[openwrt/openwrt.git] / target / linux / bcm27xx / patches-5.4 / 950-0037-Add-dwc_otg-driver.patch

From 4ece96fb20967c2723b0e3f9c915199b5817de7e Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Wed, 1 May 2013 19:46:17 +0100
Subject: [PATCH] Add dwc_otg driver
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Signed-off-by: popcornmix <popcornmix@gmail.com>

usb: dwc: fix lockdep false positive

Signed-off-by: Kari Suvanto <karis79@gmail.com>

usb: dwc: fix inconsistent lock state

Signed-off-by: Kari Suvanto <karis79@gmail.com>

Add FIQ patch to dwc_otg driver. Enable with dwc_otg.fiq_fix_enable=1. Should give about 10% more ARM performance.
Thanks to Gordon and Costas

Avoid dynamic memory allocation for channel lock in USB driver. Thanks ddv2005.

Add NAK holdoff scheme. Enabled by default, disable with dwc_otg.nak_holdoff_enable=0. Thanks gsh

Make sure we wait for the reset to finish

dwc_otg: fix bug in dwc_otg_hcd.c resulting in silent kernel
         memory corruption, escalating to OOPS under high USB load.

dwc_otg: Fix unsafe access of QTD during URB enqueue

In dwc_otg_hcd_urb_enqueue during qtd creation, it was possible that the
transaction could complete almost immediately after the qtd was assigned
to a host channel during URB enqueue, which meant the qtd pointer was no
longer valid having been completed and removed. Usually, this resulted in
an OOPS during URB submission. By predetermining whether transactions
need to be queued or not, this unsafe pointer access is avoided.

This bug was only evident on the Pi model A where a device was attached
that had no periodic endpoints (e.g. USB pendrive or some wlan devices).

dwc_otg: Fix incorrect URB allocation error handling

If the memory allocation for a dwc_otg_urb failed, the kernel would OOPS
because for some reason a member of the *unallocated* struct was set to
zero. Error handling changed to fail correctly.

dwc_otg: fix potential use-after-free case in interrupt handler

If a transaction had previously aborted, certain interrupts are
enabled to track error counts and reset where necessary. On IN
endpoints the host generates an ACK interrupt near-simultaneously
with completion of transfer. In the case where this transfer had
previously had an error, this results in a use-after-free on
the QTD memory space with a 1-byte length being overwritten to
0x00.

dwc_otg: add handling of SPLIT transaction data toggle errors

Previously a data toggle error on packets from a USB1.1 device behind
a TT would result in the Pi locking up as the driver never handled
the associated interrupt. Patch adds basic retry mechanism and
interrupt acknowledgement to cater for either a chance toggle error or
for devices that have a broken initial toggle state (FT8U232/FT232BM).

dwc_otg: implement tasklet for returning URBs to usbcore hcd layer

The dwc_otg driver interrupt handler for transfer completion will spend
a very long time with interrupts disabled when a URB is completed -
this is because usb_hcd_giveback_urb is called from within the handler
which for a USB device driver with complicated processing (e.g. webcam)
will take an exorbitant amount of time to complete. This results in
missed completion interrupts for other USB packets which lead to them
being dropped due to microframe overruns.

This patch splits returning the URB to the usb hcd layer into a
high-priority tasklet. This will have most benefit for isochronous IN
transfers but will also have incidental benefit where multiple periodic
devices are active at once.

dwc_otg: fix NAK holdoff and allow on split transactions only

This corrects a bug where if a single active non-periodic endpoint
had at least one transaction in its qh, on frnum == MAX_FRNUM the qh
would get skipped and never get queued again. This would result in
a silent device until error detection (automatic or otherwise) would
either reset the device or flush and requeue the URBs.

Additionally the NAK holdoff was enabled for all transactions - this
would potentially stall a HS endpoint for 1ms if a previous error state
enabled this interrupt and the next response was a NAK. Fix so that
only split transactions get held off.

dwc_otg: Call usb_hcd_unlink_urb_from_ep with lock held in completion handler

usb_hcd_unlink_urb_from_ep must be called with the HCD lock held.  Calling it
asynchronously in the tasklet was not safe (regression in
c4564d4a1a0a9b10d4419e48239f5d99e88d2667).

This change unlinks it from the endpoint prior to queueing it for handling in
the tasklet, and also adds a check to ensure the urb is OK to be unlinked
before doing so.

NULL pointer dereference kernel oopses had been observed in usb_hcd_giveback_urb
when a USB device was unplugged/replugged during data transfer.  This effect
was reproduced using automated USB port power control, hundreds of replug
events were performed during active transfers to confirm that the problem was
eliminated.

USB fix using a FIQ to implement split transactions

This commit adds a FIQ implementaion that schedules
the split transactions using a FIQ so we don't get
held off by the interrupt latency of Linux

dwc_otg: fix device attributes and avoid kernel warnings on boot

dcw_otg: avoid logging function that can cause panics

See: https://github.com/raspberrypi/firmware/issues/21
Thanks to cleverca22 for fix

dwc_otg: mask correct interrupts after transaction error recovery

The dwc_otg driver will unmask certain interrupts on a transaction
that previously halted in the error state in order to reset the
QTD error count. The various fine-grained interrupt handlers do not
consider that other interrupts besides themselves were unmasked.

By disabling the two other interrupts only ever enabled in DMA mode
for this purpose, we can avoid unnecessary function calls in the
IRQ handler. This will also prevent an unneccesary FIQ interrupt
from being generated if the FIQ is enabled.

dwc_otg: fiq: prevent FIQ thrash and incorrect state passing to IRQ

In the case of a transaction to a device that had previously aborted
due to an error, several interrupts are enabled to reset the error
count when a device responds. This has the side-effect of making the
FIQ thrash because the hardware will generate multiple instances of
a NAK on an IN bulk/interrupt endpoint and multiple instances of ACK
on an OUT bulk/interrupt endpoint. Make the FIQ mask and clear the
associated interrupts.

Additionally, on non-split transactions make sure that only unmasked
interrupts are cleared. This caused a hard-to-trigger but serious
race condition when you had the combination of an endpoint awaiting
error recovery and a transaction completed on an endpoint - due to
the sequencing and timing of interrupts generated by the dwc_otg core,
it was possible to confuse the IRQ handler.

Fix function tracing

dwc_otg: whitespace cleanup in dwc_otg_urb_enqueue

dwc_otg: prevent OOPSes during device disconnects

The dwc_otg_urb_enqueue function is thread-unsafe. In particular the
access of urb->hcpriv, usb_hcd_link_urb_to_ep, dwc_otg_urb->qtd and
friends does not occur within a critical section and so if a device
was unplugged during activity there was a high chance that the
usbcore hub_thread would try to disable the endpoint with partially-
formed entries in the URB queue. This would result in BUG() or null
pointer dereferences.

Fix so that access of urb->hcpriv, enqueuing to the hardware and
adding to usbcore endpoint URB lists is contained within a single
critical section.

dwc_otg: prevent BUG() in TT allocation if hub address is > 16

A fixed-size array is used to track TT allocation. This was
previously set to 16 which caused a crash because
dwc_otg_hcd_allocate_port would read past the end of the array.

This was hit if a hub was plugged in which enumerated as addr > 16,
due to previous device resets or unplugs.

Also add #ifdef FIQ_DEBUG around hcd->hub_port_alloc[], which grows
to a large size if 128 hub addresses are supported. This field is
for debug only for tracking which frame an allocate happened in.

dwc_otg: make channel halts with unknown state less damaging

If the IRQ received a channel halt interrupt through the FIQ
with no other bits set, the IRQ would not release the host
channel and never complete the URB.

Add catchall handling to treat as a transaction error and retry.

dwc_otg: fiq_split: use TTs with more granularity

This fixes certain issues with split transaction scheduling.

- Isochronous multi-packet OUT transactions now hog the TT until
  they are completed - this prevents hubs aborting transactions
  if they get a periodic start-split out-of-order
- Don't perform TT allocation on non-periodic endpoints - this
  allows simultaneous use of the TT's bulk/control and periodic
  transaction buffers

This commit will mainly affect USB audio playback.

dwc_otg: fix potential sleep while atomic during urb enqueue

Fixes a regression introduced with eb1b482a. Kmalloc called from
dwc_otg_hcd_qtd_add / dwc_otg_hcd_qtd_create did not always have
the GPF_ATOMIC flag set. Force this flag when inside the larger
critical section.

dwc_otg: make fiq_split_enable imply fiq_fix_enable

Failing to set up the FIQ correctly would result in
"IRQ 32: nobody cared" errors in dmesg.

dwc_otg: prevent crashes on host port disconnects

Fix several issues resulting in crashes or inconsistent state
if a Model A root port was disconnected.

- Clean up queue heads properly in kill_urbs_in_qh_list by
  removing the empty QHs from the schedule lists
- Set the halt status properly to prevent IRQ handlers from
  using freed memory
- Add fiq_split related cleanup for saved registers
- Make microframe scheduling reclaim host channels if
  active during a disconnect
- Abort URBs with -ESHUTDOWN status response, informing
  device drivers so they respond in a more correct fashion
  and don't try to resubmit URBs
- Prevent IRQ handlers from attempting to handle channel
  interrupts if the associated URB was dequeued (and the
  driver state was cleared)

dwc_otg: prevent leaking URBs during enqueue

A dwc_otg_urb would get leaked if the HCD enqueue function
failed for any reason. Free the URB at the appropriate points.

dwc_otg: Enable NAK holdoff for control split transactions

Certain low-speed devices take a very long time to complete a
data or status stage of a control transaction, producing NAK
responses until they complete internal processing - the USB2.0
spec limit is up to 500mS. This causes the same type of interrupt
storm as seen with USB-serial dongles prior to c8edb238.

In certain circumstances, usually while booting, this interrupt
storm could cause SD card timeouts.

dwc_otg: Fix for occasional lockup on boot when doing a USB reset

dwc_otg: Don't issue traffic to LS devices in FS mode

Issuing low-speed packets when the root port is in full-speed mode
causes the root port to stop responding. Explicitly fail when
enqueuing URBs to a LS endpoint on a FS bus.

Fix ARM architecture issue with local_irq_restore()

If local_fiq_enable() is called before a local_irq_restore(flags) where
the flags variable has the F bit set, the FIQ will be erroneously disabled.

Fixup arch_local_irq_restore to avoid trampling the F bit in CPSR.

Also fix some of the hacks previously implemented for previous dwc_otg
incarnations.

dwc_otg: fiq_fsm: Base commit for driver rewrite

This commit removes the previous FIQ fixes entirely and adds fiq_fsm.

This rewrite features much more complete support for split transactions
and takes into account several OTG hardware bugs. High-speed
isochronous transactions are also capable of being performed by fiq_fsm.

All driver options have been removed and replaced with:
  - dwc_otg.fiq_enable (bool)
  - dwc_otg.fiq_fsm_enable (bool)
  - dwc_otg.fiq_fsm_mask (bitmask)
  - dwc_otg.nak_holdoff (unsigned int)

Defaults are specified such that fiq_fsm behaves similarly to the
previously implemented FIQ fixes.

fiq_fsm: Push error recovery into the FIQ when fiq_fsm is used

If the transfer associated with a QTD failed due to a bus error, the HCD
would retry the transfer up to 3 times (implementing the USB2.0
three-strikes retry in software).

Due to the masking mechanism used by fiq_fsm, it is only possible to pass
a single interrupt through to the HCD per-transfer.

In this instance host channels would fall off the radar because the error
reset would function, but the subsequent channel halt would be lost.

Push the error count reset into the FIQ handler.

fiq_fsm: Implement timeout mechanism

For full-speed endpoints with a large packet size, interrupt latency
runs the risk of the FIQ starting a transaction too late in a full-speed
frame. If the device is still transmitting data when EOF2 for the
downstream frame occurs, the hub will disable the port. This change is
not reflected in the hub status endpoint and the device becomes
unresponsive.

Prevent high-bandwidth transactions from being started too late in a
frame. The mechanism is not guaranteed: a combination of bit stuffing
and hub latency may still result in a device overrunning.

fiq_fsm: fix bounce buffer utilisation for Isochronous OUT

Multi-packet isochronous OUT transactions were subject to a few bounday
bugs. Fix them.

Audio playback is now much more robust: however, an issue stands with
devices that have adaptive sinks - ALSA plays samples too fast.

dwc_otg: Return full-speed frame numbers in HS mode

The frame counter increments on every *microframe* in high-speed mode.
Most device drivers expect this number to be in full-speed frames - this
caused considerable confusion to e.g. snd_usb_audio which uses the
frame counter to estimate the number of samples played.

fiq_fsm: save PID on completion of interrupt OUT transfers

Also add edge case handling for interrupt transports.

Note that for periodic split IN, data toggles are unimplemented in the
OTG host hardware - it unconditionally accepts any PID.

fiq_fsm: add missing case for fiq_fsm_tt_in_use()

Certain combinations of bitrate and endpoint activity could
result in a periodic transaction erroneously getting started
while the previous Isochronous OUT was still active.

fiq_fsm: clear hcintmsk for aborted transactions

Prevents the FIQ from erroneously handling interrupts
on a timed out channel.

fiq_fsm: enable by default

fiq_fsm: fix dequeues for non-periodic split transactions

If a dequeue happened between the SSPLIT and CSPLIT phases of the
transaction, the HCD would never receive an interrupt.

fiq_fsm: Disable by default

fiq_fsm: Handle HC babble errors

The HCTSIZ transfer size field raises a babble interrupt if
the counter wraps. Handle the resulting interrupt in this case.

dwc_otg: fix interrupt registration for fiq_enable=0

Additionally make the module parameter conditional for wherever
hcd->fiq_state is touched.

fiq_fsm: Enable by default

dwc_otg: Fix various issues with root port and transaction errors

Process the host port interrupts correctly (and don't trample them).
Root port hotplug now functional again.

Fix a few thinkos with the transaction error passthrough for fiq_fsm.

fiq_fsm: Implement hack for Split Interrupt transactions

Hubs aren't too picky about which endpoint we send Control type split
transactions to. By treating Interrupt transfers as Control, it is
possible to use the non-periodic queue in the OTG core as well as the
non-periodic FIFOs in the hub itself. This massively reduces the
microframe exclusivity/contention that periodic split transactions
otherwise have to enforce.

It goes without saying that this is a fairly egregious USB specification
violation, but it works.

Original idea by Hans Petter Selasky @ FreeBSD.org.

dwc_otg: FIQ support on SMP. Set up FIQ stack and handler on Core 0 only.

dwc_otg: introduce fiq_fsm_spin(un|)lock()

SMP safety for the FIQ relies on register read-modify write cycles being
completed in the correct order. Several places in the DWC code modify
registers also touched by the FIQ. Protect these by a bare-bones lock
mechanism.

This also makes it possible to run the FIQ and IRQ handlers on different
cores.

fiq_fsm: fix build on bcm2708 and bcm2709 platforms

dwc_otg: put some barriers back where they should be for UP

bcm2709/dwc_otg: Setup FIQ on core 1 if >1 core active

dwc_otg: fixup read-modify-write in critical paths

Be more careful about read-modify-write on registers that the FIQ
also touches.

Guard fiq_fsm_spin_lock with fiq_enable check

fiq_fsm: Falling out of the state machine isn't fatal

This edge case can be hit if the port is disabled while the FIQ is
in the middle of a transaction. Make the effects less severe.

Also get rid of the useless return value.

squash: dwc_otg: Allow to build without SMP

usb: core: make overcurrent messages more prominent

Hub overcurrent messages are more serious than "debug". Increase loglevel.

usb: dwc_otg: Don't use dma_to_virt()

Commit 6ce0d20 changes dma_to_virt() which breaks this driver.
Open code the old dma_to_virt() implementation to work around this.

Limit the use of __bus_to_virt() to cases where transfer_buffer_length
is set and transfer_buffer is not set. This is done to increase the
chance that this driver will also work on ARCH_BCM2835.

transfer_buffer should not be NULL if the length is set, but the
comment in the code indicates that there are situations where this
might happen. drivers/usb/isp1760/isp1760-hcd.c also has a similar
comment pointing to a possible: 'usb storage / SCSI bug'.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

dwc_otg: Fix crash when fiq_enable=0

dwc_otg: fiq_fsm: Make high-speed isochronous strided transfers work properly

Certain low-bandwidth high-speed USB devices (specialist audio devices,
compressed-frame webcams) have packet intervals > 1 microframe.

Stride these transfers in the FIQ by using the start-of-frame interrupt
to restart the channel at the right time.

dwc_otg: Force host mode to fix incorrect compute module boards

dwc_otg: Add ARCH_BCM2835 support

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

dwc_otg: Simplify FIQ irq number code

Dropping ATAGS means we can simplify the FIQ irq number code.
Also add error checking on the returned irq number.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

dwc_otg: Remove duplicate gadget probe/unregister function

dwc_otg: Properly set the HFIR

Douglas Anderson reported:

According to the most up to date version of the dwc2 databook, the FRINT
field of the HFIR register should be programmed to:
* 125 us * (PHY clock freq for HS) - 1
* 1000 us * (PHY clock freq for FS/LS) - 1

This is opposed to older versions of the doc that claimed it should be:
* 125 us * (PHY clock freq for HS)
* 1000 us * (PHY clock freq for FS/LS)

and reported lower timing jitter on a USB analyser

dcw_otg: trim xfer length when buffer larger than allocated size is received

dwc_otg: Don't free qh align buffers in atomic context

dwc_otg: Enable the hack for Split Interrupt transactions by default

dwc_otg.fiq_fsm_mask=0xF has long been a suggestion for users with audio stutters or other USB bandwidth issues.
So far we are aware of many success stories but no failure caused by this setting.
Make it a default to learn more.

See: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=70437

Signed-off-by: popcornmix <popcornmix@gmail.com>

dwc_otg: Use kzalloc when suitable

dwc_otg: Pass struct device to dma_alloc*()

This makes it possible to get the bus address from Device Tree.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

dwc_otg: fix summarize urb->actual_length for isochronous transfers

Kernel does not copy input data of ISO transfers to userspace
if actual_length is set only in ISO transfers and not summarized
in urb->actual_length. Fixes raspberrypi/linux#903

fiq_fsm: Use correct states when starting isoc OUT transfers

In fiq_fsm_start_next_periodic() if an isochronous OUT transfer
was selected, no regard was given as to whether this was a single-packet
transfer or a multi-packet staged transfer.

For single-packet transfers, this had the effect of repeatedly sending
OUT packets with bogus data and lengths.

Eventually if the channel was repeatedly enabled enough times, this
would lock up the OTG core and no further bus transfers would happen.

Set the FSM state up properly if we select a single-packet transfer.

Fixes https://github.com/raspberrypi/linux/issues/1842

dwc_otg: make nak_holdoff work as intended with empty queues

If URBs reading from non-periodic split endpoints were dequeued and
the last transfer from the endpoint was a NAK handshake, the resulting
qh->nak_frame value was stale which would result in unnecessarily long
polling intervals for the first subsequent transfer with a fresh URB.

Fixup qh->nak_frame in dwc_otg_hcd_urb_dequeue and also guard against
a case where a single URB is submitted to the endpoint, a NAK was
received on the transfer immediately prior to receiving data and the
device subsequently resubmits another URB past the qh->nak_frame interval.

Fixes https://github.com/raspberrypi/linux/issues/1709

dwc_otg: fix split transaction data toggle handling around dequeues

See https://github.com/raspberrypi/linux/issues/1709

Fix several issues regarding endpoint state when URBs are dequeued
- If the HCD is disconnected, flush FIQ-enabled channels properly
- Save the data toggle state for bulk endpoints if the last transfer
  from an endpoint where URBs were dequeued returned a data packet
- Reset hc->start_pkt_count properly in assign_and_init_hc()

dwc_otg: fix several potential crash sources

On root port disconnect events, the host driver state is cleared and
in-progress host channels are forcibly stopped. This doesn't play
well with the FIQ running in the background, so:
- Guard the disconnect callback with both the host spinlock and FIQ
  spinlock
- Move qtd dereference in dwc_otg_handle_hc_fsm() after the early-out
  so we don't dereference a qtd that has gone away
- Turn catch-all BUG()s in dwc_otg_handle_hc_fsm() into warnings.

dwc_otg: delete hcd->channel_lock

The lock serves no purpose as it is only held while the HCD spinlock
is already being held.

dwc_otg: remove unnecessary dma-mode channel halts on disconnect interrupt

Host channels are already halted in kill_urbs_in_qh_list() with the
subsequent interrupt processing behaving as if the URB was dequeued
via HCD callback.

There's no need to clobber the host channel registers a second time
as this exposes races between the driver and host channel resulting
in hcd->free_hc_list becoming corrupted.

dwcotg: Allow to build without FIQ on ARM64

Signed-off-by: popcornmix <popcornmix@gmail.com>

dwc_otg: make periodic scheduling behave properly for FS buses

If the root port is in full-speed mode, transfer times at 12mbit/s
would be calculated but matched against high-speed quotas.

Reinitialise hcd->frame_usecs[i] on each port enable event so that
full-speed bandwidth can be tracked sensibly.

Also, don't bother using the FIQ for transfers when in full-speed
mode - at the slower bus speed, interrupt frequency is reduced by
an order of magnitude.

Related issue: https://github.com/raspberrypi/linux/issues/2020

dwc_otg: fiq_fsm: Make isochronous compatibility checks work properly

Get rid of the spammy printk and local pointer mangling.
Also, there is a nominal benefit for using fiq_fsm for isochronous
transfers in FS mode (~1.1k IRQs per second vs 2.1k IRQs per second)
so remove the root port speed check.

dwc_otg: add module parameter int_ep_interval_min

Add a module parameter (defaulting to ignored) that clamps the polling rate
of high-speed Interrupt endpoints to a minimum microframe interval.

The parameter is modifiable at runtime as it is used when activating new
endpoints (such as on device connect).

dwc_otg: fiq_fsm: Add non-periodic TT exclusivity constraints

Certain hub types do not discriminate between pipe direction (IN or OUT)
when considering non-periodic transfers. Therefore these hubs get confused
if multiple transfers are issued in different directions with the same
device address and endpoint number.

Constrain queuing non-periodic split transactions so they are performed
serially in such cases.

Related: https://github.com/raspberrypi/linux/issues/2024

dwc_otg: Fixup change to DRIVER_ATTR interface

dwc_otg: Fix compilation warnings

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

USB_DWCOTG: Disable building dwc_otg as a module (#2265)

When dwc_otg is built as a module, build will fail with the following
error:

ERROR: "DWC_TASK_HI_SCHEDULE" [drivers/usb/host/dwc_otg/dwc_otg.ko] undefined!
scripts/Makefile.modpost:91: recipe for target '__modpost' failed
make[1]: *** [__modpost] Error 1
Makefile:1199: recipe for target 'modules' failed
make: *** [modules] Error 2

Even if the error is solved by including the missing
DWC_TASK_HI_SCHEDULE function, the kernel will panic when loading
dwc_otg.

As a workaround, simply prevent user from building dwc_otg as a module
as the current kernel does not support it.

See: https://github.com/raspberrypi/linux/issues/2258

Signed-off-by: Malik Olivier Boussejra <malik@boussejra.com>

dwc_otg: New timer API

dwc_otg: Fix removed ACCESS_ONCE->READ_ONCE

dwc_otg: don't unconditionally force host mode in dwc_otg_cil_init()

Add the ability to disable force_host_mode for those that want to use
dwc_otg in both device and host modes.

dwc_otg: Fix a regression when dequeueing isochronous transfers

In 282bed95 (dwc_otg: make nak_holdoff work as intended with empty queues)
the dequeue mechanism was changed to leave FIQ-enabled transfers to run
to completion - to avoid leaving hub TT buffers with stale packets lying
around.

This broke FIQ-accelerated isochronous transfers, as this then meant that
dozens of transfers were performed after the dequeue function returned.

Restore the state machine fence for isochronous transfers.

fiq_fsm: rewind DMA pointer for OUT transactions that fail (#2288)

See: https://github.com/raspberrypi/linux/issues/2140

dwc_otg: add smp_mb() to prevent driver state corruption on boot

Occasional crashes have been seen where the FIQ code dereferences
invalid/random pointers immediately after being set up, leading to
panic on boot.

The crash occurs as the FIQ code races against hcd_init_fiq() and
the hcd_init_fiq() code races against the outstanding memory stores
from dwc_otg_hcd_init(). Use explicit barriers after touching
driver state.

usb: dwc_otg: fix memory corruption in dwc_otg driver

[Upstream commit 51b1b6491752ac066ee8d32cc66042fcc955fef6]

The move from the staging tree to the main tree exposed a
longstanding memory corruption bug in the dwc2 driver. The
reordering of the driver initialization caused the dwc2 driver
to corrupt the initialization data of the sdhci driver on the
Raspberry Pi platform, which made the bug show up.

The error is in calling to_usb_device(hsotg->dev), since ->dev
is not a member of struct usb_device. The easiest fix is to
just remove the offending code, since it is not really needed.

Thanks to Stephen Warren for tracking down the cause of this.

Reported-by: Andre Heider <a.heider@gmail.com>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[lukas: port from upstream dwc2 to out-of-tree dwc_otg driver]
Signed-off-by: Lukas Wunner <lukas@wunner.de>

usb: dwb_otg: Fix unreachable switch statement warning

This warning appears with GCC 7.3.0 from toolchains.bootlin.com:

../drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c: In function ‘fiq_fsm_update_hs_isoc’:
../drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c:595:61: warning: statement will never be executed [-Wswitch-unreachable]
   st->hctsiz_copy.b.xfersize = nrpackets * st->hcchar_copy.b.mps;
                                            ~~~~~~~~~~~~~~~~~^~~~

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

dwc_otg: fiq_fsm: fix incorrect DMA register offset calculation

Rationalise the offset and update all call sites.

Fixes https://github.com/raspberrypi/linux/issues/2408

dwc_otg: fix bug with port_addr assignment for single-TT hubs

See https://github.com/raspberrypi/linux/issues/2734

The "Hub Port" field in the split transaction packet was always set
to 1 for single-TT hubs. The majority of single-TT hub products
apparently ignore this field and broadcast to all downstream enabled
ports, which masked the issue. A subset of hub devices apparently
need the port number to be exact or split transactions will fail.

usb: dwc_otg: Clean up build warnings on 64bit kernels

No functional changes. Almost all are changes to logging lines.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>

usb: dwc_otg: Use dma allocation for mphi dummy_send buffer

The FIQ driver used a kzalloc'ed buffer for dummy_send,
passing a kernel virtual address to the hardware block.
The buffer is only ever used for a dummy read, so it
should be harmless, but there is the chance that it will
cause exceptions.

Use a dma allocation so that we have a genuine bus address,
and read from that.
Free the allocation when done for good measure.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>

dwc_otg: only do_split when we actually need to do a split

The previous test would fail if the root port was in fullspeed mode
and there was a hub between the FS device and the root port. While
the transfer worked, the schedule mangling performed for high-speed
split transfers would break leading to an 8ms polling interval.

dwc_otg: fix locking around dequeueing and killing URBs

kill_urbs_in_qh_list() is practically only ever called with the fiq lock
already held, so don't spinlock twice in the case where we need to cancel
an isochronous transfer.

Also fix up a case where the global interrupt register could be read with
the fiq lock not held.

Fixes the deadlock seen in https://github.com/raspberrypi/linux/issues/2907

ARM64/DWC_OTG: Port dwc_otg driver to ARM64

In ARM64, the FIQ mechanism used by this driver is not current
implemented.   As a workaround, reqular IRQ is used instead
of FIQ.

In a separate change, the IRQ-CPU mapping is round robined
on ARM64 to increase concurrency and allow multiple interrupts
to be serviced at a time.  This reduces the need for FIQ.

Tests Run:

This mechanism is most likely to break when multiple USB devices
are attached at the same time.  So the system was tested under
stress.

Devices:

1. USB Speakers playing back a FLAC audio through VLC
   at 96KHz.(Higher then typically, but supported on my speakers).

2. sftp transferring large files through the buildin ethernet
   connection which is connected through USB.

3. Keyboard and mouse attached and being used.

Although I do occasionally hear some glitches, the music seems to
play quite well.

Signed-off-by: Michael Zoran <mzoran@crowfest.net>

usb: dwc_otg: Clean up interrupt claiming code

The FIQ/IRQ interrupt number identification code is scattered through
the dwc_otg driver. Rationalise it, simplifying the code and solving
an existing issue.

See: https://github.com/raspberrypi/linux/issues/2612

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

dwc_otg: Choose appropriate IRQ handover strategy

2711 has no MPHI peripheral, but the ARM Control block can fake
interrupts. Use the size of the DTB "mphi" reg block to determine
which is required.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

usb: host: dwc_otg: fix compiling in separate directory

The dwc_otg Makefile does not respect the O=path argument correctly:
include paths in CFLAGS are given relatively to object path, not source
path. Compiling in a separate directory yields #include errors.

Signed-off-by: Marek Behún <marek.behun@nic.cz>

dwc_otg: use align_buf for small IN control transfers (#3150)

The hardware will do a 4-byte write to memory on any IN packet received
that is between 1 and 3 bytes long. This tramples memory in the uvcvideo
driver, as it uses a sequence of 1- and 2-byte control transfers to
query the min/max/range/step of each individual camera control and
gives us buffers that are offsets into a struct.

Catch small control transfers in the data phase and use the align_buf
to bounce the correct number of bytes into the URB's buffer.

In general, short packets on non-control endpoints should be OK as URBs
should have enough buffer space for a wMaxPacket size transfer.

See: https://github.com/raspberrypi/linux/issues/3148

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
---
 arch/arm/include/asm/irqflags.h               |   16 +-
 arch/arm/kernel/fiqasm.S                      |    4 +
 drivers/usb/Makefile                          |    1 +
 drivers/usb/core/generic.c                    |    1 +
 drivers/usb/core/hub.c                        |    2 +-
 drivers/usb/core/message.c                    |   79 +
 drivers/usb/core/otg_whitelist.h              |  114 +-
 drivers/usb/gadget/file_storage.c             | 3676 +++++++++
 drivers/usb/host/Kconfig                      |   10 +
 drivers/usb/host/Makefile                     |    1 +
 drivers/usb/host/dwc_common_port/Makefile     |   58 +
 .../usb/host/dwc_common_port/Makefile.fbsd    |   17 +
 .../usb/host/dwc_common_port/Makefile.linux   |   49 +
 drivers/usb/host/dwc_common_port/changes.txt  |  174 +
 .../usb/host/dwc_common_port/doc/doxygen.cfg  |  270 +
 drivers/usb/host/dwc_common_port/dwc_cc.c     |  532 ++
 drivers/usb/host/dwc_common_port/dwc_cc.h     |  224 +
 .../host/dwc_common_port/dwc_common_fbsd.c    | 1308 +++
 .../host/dwc_common_port/dwc_common_linux.c   | 1409 ++++
 .../host/dwc_common_port/dwc_common_nbsd.c    | 1275 +++
 drivers/usb/host/dwc_common_port/dwc_crypto.c |  308 +
 drivers/usb/host/dwc_common_port/dwc_crypto.h |  111 +
 drivers/usb/host/dwc_common_port/dwc_dh.c     |  291 +
 drivers/usb/host/dwc_common_port/dwc_dh.h     |  106 +
 drivers/usb/host/dwc_common_port/dwc_list.h   |  594 ++
 drivers/usb/host/dwc_common_port/dwc_mem.c    |  245 +
 drivers/usb/host/dwc_common_port/dwc_modpow.c |  636 ++
 drivers/usb/host/dwc_common_port/dwc_modpow.h |   34 +
 .../usb/host/dwc_common_port/dwc_notifier.c   |  319 +
 .../usb/host/dwc_common_port/dwc_notifier.h   |  122 +
 drivers/usb/host/dwc_common_port/dwc_os.h     | 1276 +++
 drivers/usb/host/dwc_common_port/usb.h        |  946 +++
 drivers/usb/host/dwc_otg/Makefile             |   85 +
 drivers/usb/host/dwc_otg/doc/doxygen.cfg      |  224 +
 drivers/usb/host/dwc_otg/dummy_audio.c        | 1574 ++++
 drivers/usb/host/dwc_otg/dwc_cfi_common.h     |  142 +
 drivers/usb/host/dwc_otg/dwc_otg_adp.c        |  854 ++
 drivers/usb/host/dwc_otg/dwc_otg_adp.h        |   80 +
 drivers/usb/host/dwc_otg/dwc_otg_attr.c       | 1212 +++
 drivers/usb/host/dwc_otg/dwc_otg_attr.h       |   89 +
 drivers/usb/host/dwc_otg/dwc_otg_cfi.c        | 1876 +++++
 drivers/usb/host/dwc_otg/dwc_otg_cfi.h        |  320 +
 drivers/usb/host/dwc_otg/dwc_otg_cil.c        | 7146 +++++++++++++++++
 drivers/usb/host/dwc_otg/dwc_otg_cil.h        | 1464 ++++
 drivers/usb/host/dwc_otg/dwc_otg_cil_intr.c   | 1601 ++++
 drivers/usb/host/dwc_otg/dwc_otg_core_if.h    |  705 ++
 drivers/usb/host/dwc_otg/dwc_otg_dbg.h        |  117 +
 drivers/usb/host/dwc_otg/dwc_otg_driver.c     | 1772 ++++
 drivers/usb/host/dwc_otg/dwc_otg_driver.h     |   86 +
 drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c    | 1425 ++++
 drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h    |  399 +
 drivers/usb/host/dwc_otg/dwc_otg_fiq_stub.S   |   80 +
 drivers/usb/host/dwc_otg/dwc_otg_hcd.c        | 4327 ++++++++++
 drivers/usb/host/dwc_otg/dwc_otg_hcd.h        |  870 ++
 drivers/usb/host/dwc_otg/dwc_otg_hcd_ddma.c   | 1134 +++
 drivers/usb/host/dwc_otg/dwc_otg_hcd_if.h     |  421 +
 drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c   | 2757 +++++++
 drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c  | 1083 +++
 drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c  |  970 +++
 drivers/usb/host/dwc_otg/dwc_otg_os_dep.h     |  199 +
 drivers/usb/host/dwc_otg/dwc_otg_pcd.c        | 2725 +++++++
 drivers/usb/host/dwc_otg/dwc_otg_pcd.h        |  273 +
 drivers/usb/host/dwc_otg/dwc_otg_pcd_if.h     |  361 +
 drivers/usb/host/dwc_otg/dwc_otg_pcd_intr.c   | 5148 ++++++++++++
 drivers/usb/host/dwc_otg/dwc_otg_pcd_linux.c  | 1262 +++
 drivers/usb/host/dwc_otg/dwc_otg_regs.h       | 2550 ++++++
 drivers/usb/host/dwc_otg/test/Makefile        |   16 +
 drivers/usb/host/dwc_otg/test/dwc_otg_test.pm |  337 +
 .../usb/host/dwc_otg/test/test_mod_param.pl   |  133 +
 drivers/usb/host/dwc_otg/test/test_sysfs.pl   |  193 +
 70 files changed, 60202 insertions(+), 16 deletions(-)
 create mode 100644 drivers/usb/gadget/file_storage.c
 create mode 100644 drivers/usb/host/dwc_common_port/Makefile
 create mode 100644 drivers/usb/host/dwc_common_port/Makefile.fbsd
 create mode 100644 drivers/usb/host/dwc_common_port/Makefile.linux
 create mode 100644 drivers/usb/host/dwc_common_port/changes.txt
 create mode 100644 drivers/usb/host/dwc_common_port/doc/doxygen.cfg
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_cc.c
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_cc.h
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_common_fbsd.c
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_common_linux.c
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_common_nbsd.c
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_crypto.c
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_crypto.h
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_dh.c
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_dh.h
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_list.h
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_mem.c
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_modpow.c
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_modpow.h
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_notifier.c
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_notifier.h
 create mode 100644 drivers/usb/host/dwc_common_port/dwc_os.h
 create mode 100644 drivers/usb/host/dwc_common_port/usb.h
 create mode 100644 drivers/usb/host/dwc_otg/Makefile
 create mode 100644 drivers/usb/host/dwc_otg/doc/doxygen.cfg
 create mode 100644 drivers/usb/host/dwc_otg/dummy_audio.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_cfi_common.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_adp.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_adp.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_attr.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_attr.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_cfi.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_cfi.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_cil.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_cil.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_cil_intr.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_core_if.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_dbg.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_driver.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_driver.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_fiq_stub.S
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_hcd.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_hcd.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_hcd_ddma.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_hcd_if.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_os_dep.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_pcd.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_pcd.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_pcd_if.h
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_pcd_intr.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_pcd_linux.c
 create mode 100644 drivers/usb/host/dwc_otg/dwc_otg_regs.h
 create mode 100644 drivers/usb/host/dwc_otg/test/Makefile
 create mode 100644 drivers/usb/host/dwc_otg/test/dwc_otg_test.pm
 create mode 100644 drivers/usb/host/dwc_otg/test/test_mod_param.pl
 create mode 100644 drivers/usb/host/dwc_otg/test/test_sysfs.pl

--- a/arch/arm/include/asm/irqflags.h
+++ b/arch/arm/include/asm/irqflags.h
@@ -163,13 +163,23 @@ static inline unsigned long arch_local_s
 }
 
 /*
- * restore saved IRQ & FIQ state
+ * restore saved IRQ state
  */
 #define arch_local_irq_restore arch_local_irq_restore
 static inline void arch_local_irq_restore(unsigned long flags)
 {
-       asm volatile(
-               "       msr     " IRQMASK_REG_NAME_W ", %0      @ local_irq_restore"
+       unsigned long temp = 0;
+       flags &= ~(1 << 6);
+       asm volatile (
+               " mrs %0, cpsr"
+               : "=r" (temp)
+               :
+               : "memory", "cc");
+               /* Preserve FIQ bit */
+               temp &= (1 << 6);
+               flags = flags | temp;
+       asm volatile (
+               "    msr    cpsr_c, %0    @ local_irq_restore"
                :
                : "r" (flags)
                : "memory", "cc");
--- a/arch/arm/kernel/fiqasm.S
+++ b/arch/arm/kernel/fiqasm.S
@@ -47,3 +47,7 @@ ENTRY(__get_fiq_regs)
        mov     r0, r0          @ avoid hazard prior to ARMv4
        ret     lr
 ENDPROC(__get_fiq_regs)
+
+ENTRY(__FIQ_Branch)
+       mov pc, r8
+ENDPROC(__FIQ_Branch)
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_USB_COMMON)        += common/
 obj-$(CONFIG_USB)              += core/
 obj-$(CONFIG_USB_SUPPORT)      += phy/
 
+obj-$(CONFIG_USB_DWCOTG)       += host/
 obj-$(CONFIG_USB_DWC3)         += dwc3/
 obj-$(CONFIG_USB_DWC2)         += dwc2/
 obj-$(CONFIG_USB_ISP1760)      += isp1760/
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -190,6 +190,7 @@ int usb_choose_configuration(struct usb_
                dev_warn(&udev->dev,
                        "no configuration chosen from %d choice%s\n",
                        num_configs, plural(num_configs));
+               dev_warn(&udev->dev, "No support over %dmA\n", udev->bus_mA);
        }
        return i;
 }
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -5296,7 +5296,7 @@ static void port_event(struct usb_hub *h
                port_dev->over_current_count++;
                port_over_current_notify(port_dev);
 
-               dev_dbg(&port_dev->dev, "over-current change #%u\n",
+               dev_notice(&port_dev->dev, "over-current change #%u\n",
                        port_dev->over_current_count);
                usb_clear_port_feature(hdev, port1,
                                USB_PORT_FEAT_C_OVER_CURRENT);
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1993,6 +1993,85 @@ free_interfaces:
        if (cp->string == NULL &&
                        !(dev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
                cp->string = usb_cache_string(dev, cp->desc.iConfiguration);
+/* Uncomment this define to enable the HS Electrical Test support */
+#define DWC_HS_ELECT_TST 1
+#ifdef DWC_HS_ELECT_TST
+               /* Here we implement the HS Electrical Test support. The
+                * tester uses a vendor ID of 0x1A0A to indicate we should
+                * run a special test sequence. The product ID tells us
+                * which sequence to run. We invoke the test sequence by
+                * sending a non-standard SetFeature command to our root
+                * hub port. Our dwc_otg_hcd_hub_control() routine will
+                * recognize the command and perform the desired test
+                * sequence.
+                */
+               if (dev->descriptor.idVendor == 0x1A0A) {
+                       /* HSOTG Electrical Test */
+                       dev_warn(&dev->dev, "VID from HSOTG Electrical Test Fixture\n");
+
+                       if (dev->bus && dev->bus->root_hub) {
+                               struct usb_device *hdev = dev->bus->root_hub;
+                               dev_warn(&dev->dev, "Got PID 0x%x\n", dev->descriptor.idProduct);
+
+                               switch (dev->descriptor.idProduct) {
+                               case 0x0101:    /* TEST_SE0_NAK */
+                                       dev_warn(&dev->dev, "TEST_SE0_NAK\n");
+                                       usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+                                                       USB_REQ_SET_FEATURE, USB_RT_PORT,
+                                                       USB_PORT_FEAT_TEST, 0x300, NULL, 0, HZ);
+                                       break;
+
+                               case 0x0102:    /* TEST_J */
+                                       dev_warn(&dev->dev, "TEST_J\n");
+                                       usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+                                                       USB_REQ_SET_FEATURE, USB_RT_PORT,
+                                                       USB_PORT_FEAT_TEST, 0x100, NULL, 0, HZ);
+                                       break;
+
+                               case 0x0103:    /* TEST_K */
+                                       dev_warn(&dev->dev, "TEST_K\n");
+                                       usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+                                                       USB_REQ_SET_FEATURE, USB_RT_PORT,
+                                                       USB_PORT_FEAT_TEST, 0x200, NULL, 0, HZ);
+                                       break;
+
+                               case 0x0104:    /* TEST_PACKET */
+                                       dev_warn(&dev->dev, "TEST_PACKET\n");
+                                       usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+                                                       USB_REQ_SET_FEATURE, USB_RT_PORT,
+                                                       USB_PORT_FEAT_TEST, 0x400, NULL, 0, HZ);
+                                       break;
+
+                               case 0x0105:    /* TEST_FORCE_ENABLE */
+                                       dev_warn(&dev->dev, "TEST_FORCE_ENABLE\n");
+                                       usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+                                                       USB_REQ_SET_FEATURE, USB_RT_PORT,
+                                                       USB_PORT_FEAT_TEST, 0x500, NULL, 0, HZ);
+                                       break;
+
+                               case 0x0106:    /* HS_HOST_PORT_SUSPEND_RESUME */
+                                       dev_warn(&dev->dev, "HS_HOST_PORT_SUSPEND_RESUME\n");
+                                       usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+                                                       USB_REQ_SET_FEATURE, USB_RT_PORT,
+                                                       USB_PORT_FEAT_TEST, 0x600, NULL, 0, 40 * HZ);
+                                       break;
+
+                               case 0x0107:    /* SINGLE_STEP_GET_DEVICE_DESCRIPTOR setup */
+                                       dev_warn(&dev->dev, "SINGLE_STEP_GET_DEVICE_DESCRIPTOR setup\n");
+                                       usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+                                                       USB_REQ_SET_FEATURE, USB_RT_PORT,
+                                                       USB_PORT_FEAT_TEST, 0x700, NULL, 0, 40 * HZ);
+                                       break;
+
+                               case 0x0108:    /* SINGLE_STEP_GET_DEVICE_DESCRIPTOR execute */
+                                       dev_warn(&dev->dev, "SINGLE_STEP_GET_DEVICE_DESCRIPTOR execute\n");
+                                       usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+                                                       USB_REQ_SET_FEATURE, USB_RT_PORT,
+                                                       USB_PORT_FEAT_TEST, 0x800, NULL, 0, 40 * HZ);
+                               }
+                       }
+               }
+#endif /* DWC_HS_ELECT_TST */
 
        /* Now that the interfaces are installed, re-enable LPM. */
        usb_unlocked_enable_lpm(dev);
--- a/drivers/usb/core/otg_whitelist.h
+++ b/drivers/usb/core/otg_whitelist.h
@@ -15,33 +15,82 @@
 static struct usb_device_id whitelist_table[] = {
 
 /* hubs are optional in OTG, but very handy ... */
+#define CERT_WITHOUT_HUBS
+#if defined(CERT_WITHOUT_HUBS)
+{ USB_DEVICE( 0x0000, 0x0000 ), }, /* Root HUB Only*/
+#else
 { USB_DEVICE_INFO(USB_CLASS_HUB, 0, 0), },
 { USB_DEVICE_INFO(USB_CLASS_HUB, 0, 1), },
+{ USB_DEVICE_INFO(USB_CLASS_HUB, 0, 2), },
+#endif
 
 #ifdef CONFIG_USB_PRINTER              /* ignoring nonstatic linkage! */
 /* FIXME actually, printers are NOT supposed to use device classes;
  * they're supposed to use interface classes...
  */
-{ USB_DEVICE_INFO(7, 1, 1) },
-{ USB_DEVICE_INFO(7, 1, 2) },
-{ USB_DEVICE_INFO(7, 1, 3) },
+//{ USB_DEVICE_INFO(7, 1, 1) },
+//{ USB_DEVICE_INFO(7, 1, 2) },
+//{ USB_DEVICE_INFO(7, 1, 3) },
 #endif
 
 #ifdef CONFIG_USB_NET_CDCETHER
 /* Linux-USB CDC Ethernet gadget */
-{ USB_DEVICE(0x0525, 0xa4a1), },
+//{ USB_DEVICE(0x0525, 0xa4a1), },
 /* Linux-USB CDC Ethernet + RNDIS gadget */
-{ USB_DEVICE(0x0525, 0xa4a2), },
+//{ USB_DEVICE(0x0525, 0xa4a2), },
 #endif
 
 #if    IS_ENABLED(CONFIG_USB_TEST)
 /* gadget zero, for testing */
-{ USB_DEVICE(0x0525, 0xa4a0), },
+//{ USB_DEVICE(0x0525, 0xa4a0), },
 #endif
 
+/* OPT Tester */
+{ USB_DEVICE( 0x1a0a, 0x0101 ), }, /* TEST_SE0_NAK */
+{ USB_DEVICE( 0x1a0a, 0x0102 ), }, /* Test_J */
+{ USB_DEVICE( 0x1a0a, 0x0103 ), }, /* Test_K */
+{ USB_DEVICE( 0x1a0a, 0x0104 ), }, /* Test_PACKET */
+{ USB_DEVICE( 0x1a0a, 0x0105 ), }, /* Test_FORCE_ENABLE */
+{ USB_DEVICE( 0x1a0a, 0x0106 ), }, /* HS_PORT_SUSPEND_RESUME  */
+{ USB_DEVICE( 0x1a0a, 0x0107 ), }, /* SINGLE_STEP_GET_DESCRIPTOR setup */
+{ USB_DEVICE( 0x1a0a, 0x0108 ), }, /* SINGLE_STEP_GET_DESCRIPTOR execute */
+
+/* Sony cameras */
+{ USB_DEVICE_VER(0x054c,0x0010,0x0410, 0x0500), },
+
+/* Memory Devices */
+//{ USB_DEVICE( 0x0781, 0x5150 ), }, /* SanDisk */
+//{ USB_DEVICE( 0x05DC, 0x0080 ), }, /* Lexar */
+//{ USB_DEVICE( 0x4146, 0x9281 ), }, /* IOMEGA */
+//{ USB_DEVICE( 0x067b, 0x2507 ), }, /* Hammer 20GB External HD  */
+{ USB_DEVICE( 0x0EA0, 0x2168 ), }, /* Ours Technology Inc. (BUFFALO ClipDrive)*/
+//{ USB_DEVICE( 0x0457, 0x0150 ), }, /* Silicon Integrated Systems Corp. */
+
+/* HP Printers */
+//{ USB_DEVICE( 0x03F0, 0x1102 ), }, /* HP Photosmart 245 */
+//{ USB_DEVICE( 0x03F0, 0x1302 ), }, /* HP Photosmart 370 Series */
+
+/* Speakers */
+//{ USB_DEVICE( 0x0499, 0x3002 ), }, /* YAMAHA YST-MS35D USB Speakers */
+//{ USB_DEVICE( 0x0672, 0x1041 ), }, /* Labtec USB Headset */
+
 { }    /* Terminating entry */
 };
 
+static inline void report_errors(struct usb_device *dev)
+{
+       /* OTG MESSAGE: report errors here, customize to match your product */
+       dev_info(&dev->dev, "device Vendor:%04x Product:%04x is not supported\n",
+                le16_to_cpu(dev->descriptor.idVendor),
+                le16_to_cpu(dev->descriptor.idProduct));
+        if (USB_CLASS_HUB == dev->descriptor.bDeviceClass){
+                dev_printk(KERN_CRIT, &dev->dev, "Unsupported Hub Topology\n");
+        } else {
+                dev_printk(KERN_CRIT, &dev->dev, "Attached Device is not Supported\n");
+        }
+}
+
+
 static int is_targeted(struct usb_device *dev)
 {
        struct usb_device_id    *id = whitelist_table;
@@ -91,16 +140,57 @@ static int is_targeted(struct usb_device
                        continue;
 
                return 1;
-       }
+               /* NOTE: can't use usb_match_id() since interface caches
+                * aren't set up yet. this is cut/paste from that code.
+                */
+               for (id = whitelist_table; id->match_flags; id++) {
+#ifdef DEBUG
+                       dev_dbg(&dev->dev,
+                               "ID: V:%04x P:%04x DC:%04x SC:%04x PR:%04x \n",
+                               id->idVendor,
+                               id->idProduct,
+                               id->bDeviceClass,
+                               id->bDeviceSubClass,
+                               id->bDeviceProtocol);
+#endif
 
-       /* add other match criteria here ... */
+                       if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
+                           id->idVendor != le16_to_cpu(dev->descriptor.idVendor))
+                               continue;
+
+                       if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
+                           id->idProduct != le16_to_cpu(dev->descriptor.idProduct))
+                               continue;
+
+                       /* No need to test id->bcdDevice_lo != 0, since 0 is never
+                          greater than any unsigned number. */
+                       if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
+                           (id->bcdDevice_lo > le16_to_cpu(dev->descriptor.bcdDevice)))
+                               continue;
+
+                       if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
+                           (id->bcdDevice_hi < le16_to_cpu(dev->descriptor.bcdDevice)))
+                               continue;
+
+                       if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
+                           (id->bDeviceClass != dev->descriptor.bDeviceClass))
+                               continue;
+
+                       if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
+                           (id->bDeviceSubClass != dev->descriptor.bDeviceSubClass))
+                               continue;
+
+                       if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
+                           (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol))
+                               continue;
 
+                       return 1;
+               }
+       }
 
-       /* OTG MESSAGE: report errors here, customize to match your product */
-       dev_err(&dev->dev, "device v%04x p%04x is not supported\n",
-               le16_to_cpu(dev->descriptor.idVendor),
-               le16_to_cpu(dev->descriptor.idProduct));
+       /* add other match criteria here ... */
 
+       report_errors(dev);
        return 0;
 }
 
--- /dev/null
+++ b/drivers/usb/gadget/file_storage.c
@@ -0,0 +1,3676 @@
+/*
+ * file_storage.c -- File-backed USB Storage Gadget, for USB development
+ *
+ * Copyright (C) 2003-2008 Alan Stern
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+/*
+ * The File-backed Storage Gadget acts as a USB Mass Storage device,
+ * appearing to the host as a disk drive or as a CD-ROM drive.  In addition
+ * to providing an example of a genuinely useful gadget driver for a USB
+ * device, it also illustrates a technique of double-buffering for increased
+ * throughput.  Last but not least, it gives an easy way to probe the
+ * behavior of the Mass Storage drivers in a USB host.
+ *
+ * Backing storage is provided by a regular file or a block device, specified
+ * by the "file" module parameter.  Access can be limited to read-only by
+ * setting the optional "ro" module parameter.  (For CD-ROM emulation,
+ * access is always read-only.)  The gadget will indicate that it has
+ * removable media if the optional "removable" module parameter is set.
+ *
+ * The gadget supports the Control-Bulk (CB), Control-Bulk-Interrupt (CBI),
+ * and Bulk-Only (also known as Bulk-Bulk-Bulk or BBB) transports, selected
+ * by the optional "transport" module parameter.  It also supports the
+ * following protocols: RBC (0x01), ATAPI or SFF-8020i (0x02), QIC-157 (0c03),
+ * UFI (0x04), SFF-8070i (0x05), and transparent SCSI (0x06), selected by
+ * the optional "protocol" module parameter.  In addition, the default
+ * Vendor ID, Product ID, release number and serial number can be overridden.
+ *
+ * There is support for multiple logical units (LUNs), each of which has
+ * its own backing file.  The number of LUNs can be set using the optional
+ * "luns" module parameter (anywhere from 1 to 8), and the corresponding
+ * files are specified using comma-separated lists for "file" and "ro".
+ * The default number of LUNs is taken from the number of "file" elements;
+ * it is 1 if "file" is not given.  If "removable" is not set then a backing
+ * file must be specified for each LUN.  If it is set, then an unspecified
+ * or empty backing filename means the LUN's medium is not loaded.  Ideally
+ * each LUN would be settable independently as a disk drive or a CD-ROM
+ * drive, but currently all LUNs have to be the same type.  The CD-ROM
+ * emulation includes a single data track and no audio tracks; hence there
+ * need be only one backing file per LUN.
+ *
+ * Requirements are modest; only a bulk-in and a bulk-out endpoint are
+ * needed (an interrupt-out endpoint is also needed for CBI).  The memory
+ * requirement amounts to two 16K buffers, size configurable by a parameter.
+ * Support is included for both full-speed and high-speed operation.
+ *
+ * Note that the driver is slightly non-portable in that it assumes a
+ * single memory/DMA buffer will be useable for bulk-in, bulk-out, and
+ * interrupt-in endpoints.  With most device controllers this isn't an
+ * issue, but there may be some with hardware restrictions that prevent
+ * a buffer from being used by more than one endpoint.
+ *
+ * Module options:
+ *
+ *     file=filename[,filename...]
+ *                             Required if "removable" is not set, names of
+ *                                     the files or block devices used for
+ *                                     backing storage
+ *     serial=HHHH...          Required serial number (string of hex chars)
+ *     ro=b[,b...]             Default false, booleans for read-only access
+ *     removable               Default false, boolean for removable media
+ *     luns=N                  Default N = number of filenames, number of
+ *                                     LUNs to support
+ *     nofua=b[,b...]          Default false, booleans for ignore FUA flag
+ *                                     in SCSI WRITE(10,12) commands
+ *     stall                   Default determined according to the type of
+ *                                     USB device controller (usually true),
+ *                                     boolean to permit the driver to halt
+ *                                     bulk endpoints
+ *     cdrom                   Default false, boolean for whether to emulate
+ *                                     a CD-ROM drive
+ *     transport=XXX           Default BBB, transport name (CB, CBI, or BBB)
+ *     protocol=YYY            Default SCSI, protocol name (RBC, 8020 or
+ *                                     ATAPI, QIC, UFI, 8070, or SCSI;
+ *                                     also 1 - 6)
+ *     vendor=0xVVVV           Default 0x0525 (NetChip), USB Vendor ID
+ *     product=0xPPPP          Default 0xa4a5 (FSG), USB Product ID
+ *     release=0xRRRR          Override the USB release number (bcdDevice)
+ *     buflen=N                Default N=16384, buffer size used (will be
+ *                                     rounded down to a multiple of
+ *                                     PAGE_CACHE_SIZE)
+ *
+ * If CONFIG_USB_FILE_STORAGE_TEST is not set, only the "file", "serial", "ro",
+ * "removable", "luns", "nofua", "stall", and "cdrom" options are available;
+ * default values are used for everything else.
+ *
+ * The pathnames of the backing files and the ro settings are available in
+ * the attribute files "file", "nofua", and "ro" in the lun<n> subdirectory of
+ * the gadget's sysfs directory.  If the "removable" option is set, writing to
+ * these files will simulate ejecting/loading the medium (writing an empty
+ * line means eject) and adjusting a write-enable tab.  Changes to the ro
+ * setting are not allowed when the medium is loaded or if CD-ROM emulation
+ * is being used.
+ *
+ * This gadget driver is heavily based on "Gadget Zero" by David Brownell.
+ * The driver's SCSI command interface was based on the "Information
+ * technology - Small Computer System Interface - 2" document from
+ * X3T9.2 Project 375D, Revision 10L, 7-SEP-93, available at
+ * <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>.  The single exception
+ * is opcode 0x23 (READ FORMAT CAPACITIES), which was based on the
+ * "Universal Serial Bus Mass Storage Class UFI Command Specification"
+ * document, Revision 1.0, December 14, 1998, available at
+ * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>.
+ */
+
+
+/*
+ *                             Driver Design
+ *
+ * The FSG driver is fairly straightforward.  There is a main kernel
+ * thread that handles most of the work.  Interrupt routines field
+ * callbacks from the controller driver: bulk- and interrupt-request
+ * completion notifications, endpoint-0 events, and disconnect events.
+ * Completion events are passed to the main thread by wakeup calls.  Many
+ * ep0 requests are handled at interrupt time, but SetInterface,
+ * SetConfiguration, and device reset requests are forwarded to the
+ * thread in the form of "exceptions" using SIGUSR1 signals (since they
+ * should interrupt any ongoing file I/O operations).
+ *
+ * The thread's main routine implements the standard command/data/status
+ * parts of a SCSI interaction.  It and its subroutines are full of tests
+ * for pending signals/exceptions -- all this polling is necessary since
+ * the kernel has no setjmp/longjmp equivalents.  (Maybe this is an
+ * indication that the driver really wants to be running in userspace.)
+ * An important point is that so long as the thread is alive it keeps an
+ * open reference to the backing file.  This will prevent unmounting
+ * the backing file's underlying filesystem and could cause problems
+ * during system shutdown, for example.  To prevent such problems, the
+ * thread catches INT, TERM, and KILL signals and converts them into
+ * an EXIT exception.
+ *
+ * In normal operation the main thread is started during the gadget's
+ * fsg_bind() callback and stopped during fsg_unbind().  But it can also
+ * exit when it receives a signal, and there's no point leaving the
+ * gadget running when the thread is dead.  So just before the thread
+ * exits, it deregisters the gadget driver.  This makes things a little
+ * tricky: The driver is deregistered at two places, and the exiting
+ * thread can indirectly call fsg_unbind() which in turn can tell the
+ * thread to exit.  The first problem is resolved through the use of the
+ * REGISTERED atomic bitflag; the driver will only be deregistered once.
+ * The second problem is resolved by having fsg_unbind() check
+ * fsg->state; it won't try to stop the thread if the state is already
+ * FSG_STATE_TERMINATED.
+ *
+ * To provide maximum throughput, the driver uses a circular pipeline of
+ * buffer heads (struct fsg_buffhd).  In principle the pipeline can be
+ * arbitrarily long; in practice the benefits don't justify having more
+ * than 2 stages (i.e., double buffering).  But it helps to think of the
+ * pipeline as being a long one.  Each buffer head contains a bulk-in and
+ * a bulk-out request pointer (since the buffer can be used for both
+ * output and input -- directions always are given from the host's
+ * point of view) as well as a pointer to the buffer and various state
+ * variables.
+ *
+ * Use of the pipeline follows a simple protocol.  There is a variable
+ * (fsg->next_buffhd_to_fill) that points to the next buffer head to use.
+ * At any time that buffer head may still be in use from an earlier
+ * request, so each buffer head has a state variable indicating whether
+ * it is EMPTY, FULL, or BUSY.  Typical use involves waiting for the
+ * buffer head to be EMPTY, filling the buffer either by file I/O or by
+ * USB I/O (during which the buffer head is BUSY), and marking the buffer
+ * head FULL when the I/O is complete.  Then the buffer will be emptied
+ * (again possibly by USB I/O, during which it is marked BUSY) and
+ * finally marked EMPTY again (possibly by a completion routine).
+ *
+ * A module parameter tells the driver to avoid stalling the bulk
+ * endpoints wherever the transport specification allows.  This is
+ * necessary for some UDCs like the SuperH, which cannot reliably clear a
+ * halt on a bulk endpoint.  However, under certain circumstances the
+ * Bulk-only specification requires a stall.  In such cases the driver
+ * will halt the endpoint and set a flag indicating that it should clear
+ * the halt in software during the next device reset.  Hopefully this
+ * will permit everything to work correctly.  Furthermore, although the
+ * specification allows the bulk-out endpoint to halt when the host sends
+ * too much data, implementing this would cause an unavoidable race.
+ * The driver will always use the "no-stall" approach for OUT transfers.
+ *
+ * One subtle point concerns sending status-stage responses for ep0
+ * requests.  Some of these requests, such as device reset, can involve
+ * interrupting an ongoing file I/O operation, which might take an
+ * arbitrarily long time.  During that delay the host might give up on
+ * the original ep0 request and issue a new one.  When that happens the
+ * driver should not notify the host about completion of the original
+ * request, as the host will no longer be waiting for it.  So the driver
+ * assigns to each ep0 request a unique tag, and it keeps track of the
+ * tag value of the request associated with a long-running exception
+ * (device-reset, interface-change, or configuration-change).  When the
+ * exception handler is finished, the status-stage response is submitted
+ * only if the current ep0 request tag is equal to the exception request
+ * tag.  Thus only the most recently received ep0 request will get a
+ * status-stage response.
+ *
+ * Warning: This driver source file is too long.  It ought to be split up
+ * into a header file plus about 3 separate .c files, to handle the details
+ * of the Gadget, USB Mass Storage, and SCSI protocols.
+ */
+
+
+/* #define VERBOSE_DEBUG */
+/* #define DUMP_MSGS */
+
+
+#include <linux/blkdev.h>
+#include <linux/completion.h>
+#include <linux/dcache.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/fcntl.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/kref.h>
+#include <linux/kthread.h>
+#include <linux/limits.h>
+#include <linux/module.h>
+#include <linux/rwsem.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <linux/freezer.h>
+#include <linux/utsname.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+#include "gadget_chips.h"
+
+
+
+/*
+ * Kbuild is not very cooperative with respect to linking separately
+ * compiled library objects into one module.  So for now we won't use
+ * separate compilation ... ensuring init/exit sections work to shrink
+ * the runtime footprint, and giving us at least some parts of what
+ * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
+ */
+#include "usbstring.c"
+#include "config.c"
+#include "epautoconf.c"
+
+/*-------------------------------------------------------------------------*/
+
+#define DRIVER_DESC            "File-backed Storage Gadget"
+#define DRIVER_NAME            "g_file_storage"
+#define DRIVER_VERSION         "1 September 2010"
+
+static       char fsg_string_manufacturer[64];
+static const char fsg_string_product[] = DRIVER_DESC;
+static const char fsg_string_config[] = "Self-powered";
+static const char fsg_string_interface[] = "Mass Storage";
+
+
+#include "storage_common.c"
+
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Alan Stern");
+MODULE_LICENSE("Dual BSD/GPL");
+
+/*
+ * This driver assumes self-powered hardware and has no way for users to
+ * trigger remote wakeup.  It uses autoconfiguration to select endpoints
+ * and endpoint addresses.
+ */
+
+
+/*-------------------------------------------------------------------------*/
+
+
+/* Encapsulate the module parameter settings */
+
+static struct {
+       char            *file[FSG_MAX_LUNS];
+       char            *serial;
+       bool            ro[FSG_MAX_LUNS];
+       bool            nofua[FSG_MAX_LUNS];
+       unsigned int    num_filenames;
+       unsigned int    num_ros;
+       unsigned int    num_nofuas;
+       unsigned int    nluns;
+
+       bool            removable;
+       bool            can_stall;
+       bool            cdrom;
+
+       char            *transport_parm;
+       char            *protocol_parm;
+       unsigned short  vendor;
+       unsigned short  product;
+       unsigned short  release;
+       unsigned int    buflen;
+
+       int             transport_type;
+       char            *transport_name;
+       int             protocol_type;
+       char            *protocol_name;
+
+} mod_data = {                                 // Default values
+       .transport_parm         = "BBB",
+       .protocol_parm          = "SCSI",
+       .removable              = 0,
+       .can_stall              = 1,
+       .cdrom                  = 0,
+       .vendor                 = FSG_VENDOR_ID,
+       .product                = FSG_PRODUCT_ID,
+       .release                = 0xffff,       // Use controller chip type
+       .buflen                 = 16384,
+       };
+
+
+module_param_array_named(file, mod_data.file, charp, &mod_data.num_filenames,
+               S_IRUGO);
+MODULE_PARM_DESC(file, "names of backing files or devices");
+
+module_param_named(serial, mod_data.serial, charp, S_IRUGO);
+MODULE_PARM_DESC(serial, "USB serial number");
+
+module_param_array_named(ro, mod_data.ro, bool, &mod_data.num_ros, S_IRUGO);
+MODULE_PARM_DESC(ro, "true to force read-only");
+
+module_param_array_named(nofua, mod_data.nofua, bool, &mod_data.num_nofuas,
+               S_IRUGO);
+MODULE_PARM_DESC(nofua, "true to ignore SCSI WRITE(10,12) FUA bit");
+
+module_param_named(luns, mod_data.nluns, uint, S_IRUGO);
+MODULE_PARM_DESC(luns, "number of LUNs");
+
+module_param_named(removable, mod_data.removable, bool, S_IRUGO);
+MODULE_PARM_DESC(removable, "true to simulate removable media");
+
+module_param_named(stall, mod_data.can_stall, bool, S_IRUGO);
+MODULE_PARM_DESC(stall, "false to prevent bulk stalls");
+
+module_param_named(cdrom, mod_data.cdrom, bool, S_IRUGO);
+MODULE_PARM_DESC(cdrom, "true to emulate cdrom instead of disk");
+
+/* In the non-TEST version, only the module parameters listed above
+ * are available. */
+#ifdef CONFIG_USB_FILE_STORAGE_TEST
+
+module_param_named(transport, mod_data.transport_parm, charp, S_IRUGO);
+MODULE_PARM_DESC(transport, "type of transport (BBB, CBI, or CB)");
+
+module_param_named(protocol, mod_data.protocol_parm, charp, S_IRUGO);
+MODULE_PARM_DESC(protocol, "type of protocol (RBC, 8020, QIC, UFI, "
+               "8070, or SCSI)");
+
+module_param_named(vendor, mod_data.vendor, ushort, S_IRUGO);
+MODULE_PARM_DESC(vendor, "USB Vendor ID");
+
+module_param_named(product, mod_data.product, ushort, S_IRUGO);
+MODULE_PARM_DESC(product, "USB Product ID");
+
+module_param_named(release, mod_data.release, ushort, S_IRUGO);
+MODULE_PARM_DESC(release, "USB release number");
+
+module_param_named(buflen, mod_data.buflen, uint, S_IRUGO);
+MODULE_PARM_DESC(buflen, "I/O buffer size");
+
+#endif /* CONFIG_USB_FILE_STORAGE_TEST */
+
+
+/*
+ * These definitions will permit the compiler to avoid generating code for
+ * parts of the driver that aren't used in the non-TEST version.  Even gcc
+ * can recognize when a test of a constant expression yields a dead code
+ * path.
+ */
+
+#ifdef CONFIG_USB_FILE_STORAGE_TEST
+
+#define transport_is_bbb()     (mod_data.transport_type == USB_PR_BULK)
+#define transport_is_cbi()     (mod_data.transport_type == USB_PR_CBI)
+#define protocol_is_scsi()     (mod_data.protocol_type == USB_SC_SCSI)
+
+#else
+
+#define transport_is_bbb()     1
+#define transport_is_cbi()     0
+#define protocol_is_scsi()     1
+
+#endif /* CONFIG_USB_FILE_STORAGE_TEST */
+
+
+/*-------------------------------------------------------------------------*/
+
+
+struct fsg_dev {
+       /* lock protects: state, all the req_busy's, and cbbuf_cmnd */
+       spinlock_t              lock;
+       struct usb_gadget       *gadget;
+
+       /* filesem protects: backing files in use */
+       struct rw_semaphore     filesem;
+
+       /* reference counting: wait until all LUNs are released */
+       struct kref             ref;
+
+       struct usb_ep           *ep0;           // Handy copy of gadget->ep0
+       struct usb_request      *ep0req;        // For control responses
+       unsigned int            ep0_req_tag;
+       const char              *ep0req_name;
+
+       struct usb_request      *intreq;        // For interrupt responses
+       int                     intreq_busy;
+       struct fsg_buffhd       *intr_buffhd;
+
+       unsigned int            bulk_out_maxpacket;
+       enum fsg_state          state;          // For exception handling
+       unsigned int            exception_req_tag;
+
+       u8                      config, new_config;
+
+       unsigned int            running : 1;
+       unsigned int            bulk_in_enabled : 1;
+       unsigned int            bulk_out_enabled : 1;
+       unsigned int            intr_in_enabled : 1;
+       unsigned int            phase_error : 1;
+       unsigned int            short_packet_received : 1;
+       unsigned int            bad_lun_okay : 1;
+
+       unsigned long           atomic_bitflags;
+#define REGISTERED             0
+#define IGNORE_BULK_OUT                1
+#define SUSPENDED              2
+
+       struct usb_ep           *bulk_in;
+       struct usb_ep           *bulk_out;
+       struct usb_ep           *intr_in;
+
+       struct fsg_buffhd       *next_buffhd_to_fill;
+       struct fsg_buffhd       *next_buffhd_to_drain;
+
+       int                     thread_wakeup_needed;
+       struct completion       thread_notifier;
+       struct task_struct      *thread_task;
+
+       int                     cmnd_size;
+       u8                      cmnd[MAX_COMMAND_SIZE];
+       enum data_direction     data_dir;
+       u32                     data_size;
+       u32                     data_size_from_cmnd;
+       u32                     tag;
+       unsigned int            lun;
+       u32                     residue;
+       u32                     usb_amount_left;
+
+       /* The CB protocol offers no way for a host to know when a command
+        * has completed.  As a result the next command may arrive early,
+        * and we will still have to handle it.  For that reason we need
+        * a buffer to store new commands when using CB (or CBI, which
+        * does not oblige a host to wait for command completion either). */
+       int                     cbbuf_cmnd_size;
+       u8                      cbbuf_cmnd[MAX_COMMAND_SIZE];
+
+       unsigned int            nluns;
+       struct fsg_lun          *luns;
+       struct fsg_lun          *curlun;
+       /* Must be the last entry */
+       struct fsg_buffhd       buffhds[];
+};
+
+typedef void (*fsg_routine_t)(struct fsg_dev *);
+
+static int exception_in_progress(struct fsg_dev *fsg)
+{
+       return (fsg->state > FSG_STATE_IDLE);
+}
+
+/* Make bulk-out requests be divisible by the maxpacket size */
+static void set_bulk_out_req_length(struct fsg_dev *fsg,
+               struct fsg_buffhd *bh, unsigned int length)
+{
+       unsigned int    rem;
+
+       bh->bulk_out_intended_length = length;
+       rem = length % fsg->bulk_out_maxpacket;
+       if (rem > 0)
+               length += fsg->bulk_out_maxpacket - rem;
+       bh->outreq->length = length;
+}
+
+static struct fsg_dev                  *the_fsg;
+static struct usb_gadget_driver                fsg_driver;
+
+
+/*-------------------------------------------------------------------------*/
+
+static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
+{
+       const char      *name;
+
+       if (ep == fsg->bulk_in)
+               name = "bulk-in";
+       else if (ep == fsg->bulk_out)
+               name = "bulk-out";
+       else
+               name = ep->name;
+       DBG(fsg, "%s set halt\n", name);
+       return usb_ep_set_halt(ep);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * DESCRIPTORS ... most are static, but strings and (full) configuration
+ * descriptors are built on demand.  Also the (static) config and interface
+ * descriptors are adjusted during fsg_bind().
+ */
+
+/* There is only one configuration. */
+#define        CONFIG_VALUE            1
+
+static struct usb_device_descriptor
+device_desc = {
+       .bLength =              sizeof device_desc,
+       .bDescriptorType =      USB_DT_DEVICE,
+
+       .bcdUSB =               cpu_to_le16(0x0200),
+       .bDeviceClass =         USB_CLASS_PER_INTERFACE,
+
+       /* The next three values can be overridden by module parameters */
+       .idVendor =             cpu_to_le16(FSG_VENDOR_ID),
+       .idProduct =            cpu_to_le16(FSG_PRODUCT_ID),
+       .bcdDevice =            cpu_to_le16(0xffff),
+
+       .iManufacturer =        FSG_STRING_MANUFACTURER,
+       .iProduct =             FSG_STRING_PRODUCT,
+       .iSerialNumber =        FSG_STRING_SERIAL,
+       .bNumConfigurations =   1,
+};
+
+static struct usb_config_descriptor
+config_desc = {
+       .bLength =              sizeof config_desc,
+       .bDescriptorType =      USB_DT_CONFIG,
+
+       /* wTotalLength computed by usb_gadget_config_buf() */
+       .bNumInterfaces =       1,
+       .bConfigurationValue =  CONFIG_VALUE,
+       .iConfiguration =       FSG_STRING_CONFIG,
+       .bmAttributes =         USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
+       .bMaxPower =            CONFIG_USB_GADGET_VBUS_DRAW / 2,
+};
+
+
+static struct usb_qualifier_descriptor
+dev_qualifier = {
+       .bLength =              sizeof dev_qualifier,
+       .bDescriptorType =      USB_DT_DEVICE_QUALIFIER,
+
+       .bcdUSB =               cpu_to_le16(0x0200),
+       .bDeviceClass =         USB_CLASS_PER_INTERFACE,
+
+       .bNumConfigurations =   1,
+};
+
+static int populate_bos(struct fsg_dev *fsg, u8 *buf)
+{
+       memcpy(buf, &fsg_bos_desc, USB_DT_BOS_SIZE);
+       buf += USB_DT_BOS_SIZE;
+
+       memcpy(buf, &fsg_ext_cap_desc, USB_DT_USB_EXT_CAP_SIZE);
+       buf += USB_DT_USB_EXT_CAP_SIZE;
+
+       memcpy(buf, &fsg_ss_cap_desc, USB_DT_USB_SS_CAP_SIZE);
+
+       return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE
+               + USB_DT_USB_EXT_CAP_SIZE;
+}
+
+/*
+ * Config descriptors must agree with the code that sets configurations
+ * and with code managing interfaces and their altsettings.  They must
+ * also handle different speeds and other-speed requests.
+ */
+static int populate_config_buf(struct usb_gadget *gadget,
+               u8 *buf, u8 type, unsigned index)
+{
+       enum usb_device_speed                   speed = gadget->speed;
+       int                                     len;
+       const struct usb_descriptor_header      **function;
+
+       if (index > 0)
+               return -EINVAL;
+
+       if (gadget_is_dualspeed(gadget) && type == USB_DT_OTHER_SPEED_CONFIG)
+               speed = (USB_SPEED_FULL + USB_SPEED_HIGH) - speed;
+       function = gadget_is_dualspeed(gadget) && speed == USB_SPEED_HIGH
+               ? (const struct usb_descriptor_header **)fsg_hs_function
+               : (const struct usb_descriptor_header **)fsg_fs_function;
+
+       /* for now, don't advertise srp-only devices */
+       if (!gadget_is_otg(gadget))
+               function++;
+
+       len = usb_gadget_config_buf(&config_desc, buf, EP0_BUFSIZE, function);
+       ((struct usb_config_descriptor *) buf)->bDescriptorType = type;
+       return len;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* These routines may be called in process context or in_irq */
+
+/* Caller must hold fsg->lock */
+static void wakeup_thread(struct fsg_dev *fsg)
+{
+       /* Tell the main thread that something has happened */
+       fsg->thread_wakeup_needed = 1;
+       if (fsg->thread_task)
+               wake_up_process(fsg->thread_task);
+}
+
+
+static void raise_exception(struct fsg_dev *fsg, enum fsg_state new_state)
+{
+       unsigned long           flags;
+
+       /* Do nothing if a higher-priority exception is already in progress.
+        * If a lower-or-equal priority exception is in progress, preempt it
+        * and notify the main thread by sending it a signal. */
+       spin_lock_irqsave(&fsg->lock, flags);
+       if (fsg->state <= new_state) {
+               fsg->exception_req_tag = fsg->ep0_req_tag;
+               fsg->state = new_state;
+               if (fsg->thread_task)
+                       send_sig_info(SIGUSR1, SEND_SIG_FORCED,
+                                       fsg->thread_task);
+       }
+       spin_unlock_irqrestore(&fsg->lock, flags);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* The disconnect callback and ep0 routines.  These always run in_irq,
+ * except that ep0_queue() is called in the main thread to acknowledge
+ * completion of various requests: set config, set interface, and
+ * Bulk-only device reset. */
+
+static void fsg_disconnect(struct usb_gadget *gadget)
+{
+       struct fsg_dev          *fsg = get_gadget_data(gadget);
+
+       DBG(fsg, "disconnect or port reset\n");
+       raise_exception(fsg, FSG_STATE_DISCONNECT);
+}
+
+
+static int ep0_queue(struct fsg_dev *fsg)
+{
+       int     rc;
+
+       rc = usb_ep_queue(fsg->ep0, fsg->ep0req, GFP_ATOMIC);
+       if (rc != 0 && rc != -ESHUTDOWN) {
+
+               /* We can't do much more than wait for a reset */
+               WARNING(fsg, "error in submission: %s --> %d\n",
+                               fsg->ep0->name, rc);
+       }
+       return rc;
+}
+
+static void ep0_complete(struct usb_ep *ep, struct usb_request *req)
+{
+       struct fsg_dev          *fsg = ep->driver_data;
+
+       if (req->actual > 0)
+               dump_msg(fsg, fsg->ep0req_name, req->buf, req->actual);
+       if (req->status || req->actual != req->length)
+               DBG(fsg, "%s --> %d, %u/%u\n", __func__,
+                               req->status, req->actual, req->length);
+       if (req->status == -ECONNRESET)         // Request was cancelled
+               usb_ep_fifo_flush(ep);
+
+       if (req->status == 0 && req->context)
+               ((fsg_routine_t) (req->context))(fsg);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* Bulk and interrupt endpoint completion handlers.
+ * These always run in_irq. */
+
+static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req)
+{
+       struct fsg_dev          *fsg = ep->driver_data;
+       struct fsg_buffhd       *bh = req->context;
+
+       if (req->status || req->actual != req->length)
+               DBG(fsg, "%s --> %d, %u/%u\n", __func__,
+                               req->status, req->actual, req->length);
+       if (req->status == -ECONNRESET)         // Request was cancelled
+               usb_ep_fifo_flush(ep);
+
+       /* Hold the lock while we update the request and buffer states */
+       smp_wmb();
+       spin_lock(&fsg->lock);
+       bh->inreq_busy = 0;
+       bh->state = BUF_STATE_EMPTY;
+       wakeup_thread(fsg);
+       spin_unlock(&fsg->lock);
+}
+
+static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req)
+{
+       struct fsg_dev          *fsg = ep->driver_data;
+       struct fsg_buffhd       *bh = req->context;
+
+       dump_msg(fsg, "bulk-out", req->buf, req->actual);
+       if (req->status || req->actual != bh->bulk_out_intended_length)
+               DBG(fsg, "%s --> %d, %u/%u\n", __func__,
+                               req->status, req->actual,
+                               bh->bulk_out_intended_length);
+       if (req->status == -ECONNRESET)         // Request was cancelled
+               usb_ep_fifo_flush(ep);
+
+       /* Hold the lock while we update the request and buffer states */
+       smp_wmb();
+       spin_lock(&fsg->lock);
+       bh->outreq_busy = 0;
+       bh->state = BUF_STATE_FULL;
+       wakeup_thread(fsg);
+       spin_unlock(&fsg->lock);
+}
+
+
+#ifdef CONFIG_USB_FILE_STORAGE_TEST
+static void intr_in_complete(struct usb_ep *ep, struct usb_request *req)
+{
+       struct fsg_dev          *fsg = ep->driver_data;
+       struct fsg_buffhd       *bh = req->context;
+
+       if (req->status || req->actual != req->length)
+               DBG(fsg, "%s --> %d, %u/%u\n", __func__,
+                               req->status, req->actual, req->length);
+       if (req->status == -ECONNRESET)         // Request was cancelled
+               usb_ep_fifo_flush(ep);
+
+       /* Hold the lock while we update the request and buffer states */
+       smp_wmb();
+       spin_lock(&fsg->lock);
+       fsg->intreq_busy = 0;
+       bh->state = BUF_STATE_EMPTY;
+       wakeup_thread(fsg);
+       spin_unlock(&fsg->lock);
+}
+
+#else
+static void intr_in_complete(struct usb_ep *ep, struct usb_request *req)
+{}
+#endif /* CONFIG_USB_FILE_STORAGE_TEST */
+
+
+/*-------------------------------------------------------------------------*/
+
+/* Ep0 class-specific handlers.  These always run in_irq. */
+
+#ifdef CONFIG_USB_FILE_STORAGE_TEST
+static void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+       struct usb_request      *req = fsg->ep0req;
+       static u8               cbi_reset_cmnd[6] = {
+                       SEND_DIAGNOSTIC, 4, 0xff, 0xff, 0xff, 0xff};
+
+       /* Error in command transfer? */
+       if (req->status || req->length != req->actual ||
+                       req->actual < 6 || req->actual > MAX_COMMAND_SIZE) {
+
+               /* Not all controllers allow a protocol stall after
+                * receiving control-out data, but we'll try anyway. */
+               fsg_set_halt(fsg, fsg->ep0);
+               return;                 // Wait for reset
+       }
+
+       /* Is it the special reset command? */
+       if (req->actual >= sizeof cbi_reset_cmnd &&
+                       memcmp(req->buf, cbi_reset_cmnd,
+                               sizeof cbi_reset_cmnd) == 0) {
+
+               /* Raise an exception to stop the current operation
+                * and reinitialize our state. */
+               DBG(fsg, "cbi reset request\n");
+               raise_exception(fsg, FSG_STATE_RESET);
+               return;
+       }
+
+       VDBG(fsg, "CB[I] accept device-specific command\n");
+       spin_lock(&fsg->lock);
+
+       /* Save the command for later */
+       if (fsg->cbbuf_cmnd_size)
+               WARNING(fsg, "CB[I] overwriting previous command\n");
+       fsg->cbbuf_cmnd_size = req->actual;
+       memcpy(fsg->cbbuf_cmnd, req->buf, fsg->cbbuf_cmnd_size);
+
+       wakeup_thread(fsg);
+       spin_unlock(&fsg->lock);
+}
+
+#else
+static void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{}
+#endif /* CONFIG_USB_FILE_STORAGE_TEST */
+
+
+static int class_setup_req(struct fsg_dev *fsg,
+               const struct usb_ctrlrequest *ctrl)
+{
+       struct usb_request      *req = fsg->ep0req;
+       int                     value = -EOPNOTSUPP;
+       u16                     w_index = le16_to_cpu(ctrl->wIndex);
+       u16                     w_value = le16_to_cpu(ctrl->wValue);
+       u16                     w_length = le16_to_cpu(ctrl->wLength);
+
+       if (!fsg->config)
+               return value;
+
+       /* Handle Bulk-only class-specific requests */
+       if (transport_is_bbb()) {
+               switch (ctrl->bRequest) {
+
+               case US_BULK_RESET_REQUEST:
+                       if (ctrl->bRequestType != (USB_DIR_OUT |
+                                       USB_TYPE_CLASS | USB_RECIP_INTERFACE))
+                               break;
+                       if (w_index != 0 || w_value != 0 || w_length != 0) {
+                               value = -EDOM;
+                               break;
+                       }
+
+                       /* Raise an exception to stop the current operation
+                        * and reinitialize our state. */
+                       DBG(fsg, "bulk reset request\n");
+                       raise_exception(fsg, FSG_STATE_RESET);
+                       value = DELAYED_STATUS;
+                       break;
+
+               case US_BULK_GET_MAX_LUN:
+                       if (ctrl->bRequestType != (USB_DIR_IN |
+                                       USB_TYPE_CLASS | USB_RECIP_INTERFACE))
+                               break;
+                       if (w_index != 0 || w_value != 0 || w_length != 1) {
+                               value = -EDOM;
+                               break;
+                       }
+                       VDBG(fsg, "get max LUN\n");
+                       *(u8 *) req->buf = fsg->nluns - 1;
+                       value = 1;
+                       break;
+               }
+       }
+
+       /* Handle CBI class-specific requests */
+       else {
+               switch (ctrl->bRequest) {
+
+               case USB_CBI_ADSC_REQUEST:
+                       if (ctrl->bRequestType != (USB_DIR_OUT |
+                                       USB_TYPE_CLASS | USB_RECIP_INTERFACE))
+                               break;
+                       if (w_index != 0 || w_value != 0) {
+                               value = -EDOM;
+                               break;
+                       }
+                       if (w_length > MAX_COMMAND_SIZE) {
+                               value = -EOVERFLOW;
+                               break;
+                       }
+                       value = w_length;
+                       fsg->ep0req->context = received_cbi_adsc;
+                       break;
+               }
+       }
+
+       if (value == -EOPNOTSUPP)
+               VDBG(fsg,
+                       "unknown class-specific control req "
+                       "%02x.%02x v%04x i%04x l%u\n",
+                       ctrl->bRequestType, ctrl->bRequest,
+                       le16_to_cpu(ctrl->wValue), w_index, w_length);
+       return value;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* Ep0 standard request handlers.  These always run in_irq. */
+
+static int standard_setup_req(struct fsg_dev *fsg,
+               const struct usb_ctrlrequest *ctrl)
+{
+       struct usb_request      *req = fsg->ep0req;
+       int                     value = -EOPNOTSUPP;
+       u16                     w_index = le16_to_cpu(ctrl->wIndex);
+       u16                     w_value = le16_to_cpu(ctrl->wValue);
+
+       /* Usually this just stores reply data in the pre-allocated ep0 buffer,
+        * but config change events will also reconfigure hardware. */
+       switch (ctrl->bRequest) {
+
+       case USB_REQ_GET_DESCRIPTOR:
+               if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
+                               USB_RECIP_DEVICE))
+                       break;
+               switch (w_value >> 8) {
+
+               case USB_DT_DEVICE:
+                       VDBG(fsg, "get device descriptor\n");
+                       device_desc.bMaxPacketSize0 = fsg->ep0->maxpacket;
+                       value = sizeof device_desc;
+                       memcpy(req->buf, &device_desc, value);
+                       break;
+               case USB_DT_DEVICE_QUALIFIER:
+                       VDBG(fsg, "get device qualifier\n");
+                       if (!gadget_is_dualspeed(fsg->gadget) ||
+                                       fsg->gadget->speed == USB_SPEED_SUPER)
+                               break;
+                       /*
+                        * Assume ep0 uses the same maxpacket value for both
+                        * speeds
+                        */
+                       dev_qualifier.bMaxPacketSize0 = fsg->ep0->maxpacket;
+                       value = sizeof dev_qualifier;
+                       memcpy(req->buf, &dev_qualifier, value);
+                       break;
+
+               case USB_DT_OTHER_SPEED_CONFIG:
+                       VDBG(fsg, "get other-speed config descriptor\n");
+                       if (!gadget_is_dualspeed(fsg->gadget) ||
+                                       fsg->gadget->speed == USB_SPEED_SUPER)
+                               break;
+                       goto get_config;
+               case USB_DT_CONFIG:
+                       VDBG(fsg, "get configuration descriptor\n");
+get_config:
+                       value = populate_config_buf(fsg->gadget,
+                                       req->buf,
+                                       w_value >> 8,
+                                       w_value & 0xff);
+                       break;
+
+               case USB_DT_STRING:
+                       VDBG(fsg, "get string descriptor\n");
+
+                       /* wIndex == language code */
+                       value = usb_gadget_get_string(&fsg_stringtab,
+                                       w_value & 0xff, req->buf);
+                       break;
+
+               case USB_DT_BOS:
+                       VDBG(fsg, "get bos descriptor\n");
+
+                       if (gadget_is_superspeed(fsg->gadget))
+                               value = populate_bos(fsg, req->buf);
+                       break;
+               }
+
+               break;
+
+       /* One config, two speeds */
+       case USB_REQ_SET_CONFIGURATION:
+               if (ctrl->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
+                               USB_RECIP_DEVICE))
+                       break;
+               VDBG(fsg, "set configuration\n");
+               if (w_value == CONFIG_VALUE || w_value == 0) {
+                       fsg->new_config = w_value;
+
+                       /* Raise an exception to wipe out previous transaction
+                        * state (queued bufs, etc) and set the new config. */
+                       raise_exception(fsg, FSG_STATE_CONFIG_CHANGE);
+                       value = DELAYED_STATUS;
+               }
+               break;
+       case USB_REQ_GET_CONFIGURATION:
+               if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
+                               USB_RECIP_DEVICE))
+                       break;
+               VDBG(fsg, "get configuration\n");
+               *(u8 *) req->buf = fsg->config;
+               value = 1;
+               break;
+
+       case USB_REQ_SET_INTERFACE:
+               if (ctrl->bRequestType != (USB_DIR_OUT| USB_TYPE_STANDARD |
+                               USB_RECIP_INTERFACE))
+                       break;
+               if (fsg->config && w_index == 0) {
+
+                       /* Raise an exception to wipe out previous transaction
+                        * state (queued bufs, etc) and install the new
+                        * interface altsetting. */
+                       raise_exception(fsg, FSG_STATE_INTERFACE_CHANGE);
+                       value = DELAYED_STATUS;
+               }
+               break;
+       case USB_REQ_GET_INTERFACE:
+               if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
+                               USB_RECIP_INTERFACE))
+                       break;
+               if (!fsg->config)
+                       break;
+               if (w_index != 0) {
+                       value = -EDOM;
+                       break;
+               }
+               VDBG(fsg, "get interface\n");
+               *(u8 *) req->buf = 0;
+               value = 1;
+               break;
+
+       default:
+               VDBG(fsg,
+                       "unknown control req %02x.%02x v%04x i%04x l%u\n",
+                       ctrl->bRequestType, ctrl->bRequest,
+                       w_value, w_index, le16_to_cpu(ctrl->wLength));
+       }
+
+       return value;
+}
+
+
+static int fsg_setup(struct usb_gadget *gadget,
+               const struct usb_ctrlrequest *ctrl)
+{
+       struct fsg_dev          *fsg = get_gadget_data(gadget);
+       int                     rc;
+       int                     w_length = le16_to_cpu(ctrl->wLength);
+
+       ++fsg->ep0_req_tag;             // Record arrival of a new request
+       fsg->ep0req->context = NULL;
+       fsg->ep0req->length = 0;
+       dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl));
+
+       if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
+               rc = class_setup_req(fsg, ctrl);
+       else
+               rc = standard_setup_req(fsg, ctrl);
+
+       /* Respond with data/status or defer until later? */
+       if (rc >= 0 && rc != DELAYED_STATUS) {
+               rc = min(rc, w_length);
+               fsg->ep0req->length = rc;
+               fsg->ep0req->zero = rc < w_length;
+               fsg->ep0req_name = (ctrl->bRequestType & USB_DIR_IN ?
+                               "ep0-in" : "ep0-out");
+               rc = ep0_queue(fsg);
+       }
+
+       /* Device either stalls (rc < 0) or reports success */
+       return rc;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* All the following routines run in process context */
+
+
+/* Use this for bulk or interrupt transfers, not ep0 */
+static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep,
+               struct usb_request *req, int *pbusy,
+               enum fsg_buffer_state *state)
+{
+       int     rc;
+
+       if (ep == fsg->bulk_in)
+               dump_msg(fsg, "bulk-in", req->buf, req->length);
+       else if (ep == fsg->intr_in)
+               dump_msg(fsg, "intr-in", req->buf, req->length);
+
+       spin_lock_irq(&fsg->lock);
+       *pbusy = 1;
+       *state = BUF_STATE_BUSY;
+       spin_unlock_irq(&fsg->lock);
+       rc = usb_ep_queue(ep, req, GFP_KERNEL);
+       if (rc != 0) {
+               *pbusy = 0;
+               *state = BUF_STATE_EMPTY;
+
+               /* We can't do much more than wait for a reset */
+
+               /* Note: currently the net2280 driver fails zero-length
+                * submissions if DMA is enabled. */
+               if (rc != -ESHUTDOWN && !(rc == -EOPNOTSUPP &&
+                                               req->length == 0))
+                       WARNING(fsg, "error in submission: %s --> %d\n",
+                                       ep->name, rc);
+       }
+}
+
+
+static int sleep_thread(struct fsg_dev *fsg)
+{
+       int     rc = 0;
+
+       /* Wait until a signal arrives or we are woken up */
+       for (;;) {
+               try_to_freeze();
+               set_current_state(TASK_INTERRUPTIBLE);
+               if (signal_pending(current)) {
+                       rc = -EINTR;
+                       break;
+               }
+               if (fsg->thread_wakeup_needed)
+                       break;
+               schedule();
+       }
+       __set_current_state(TASK_RUNNING);
+       fsg->thread_wakeup_needed = 0;
+       return rc;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int do_read(struct fsg_dev *fsg)
+{
+       struct fsg_lun          *curlun = fsg->curlun;
+       u32                     lba;
+       struct fsg_buffhd       *bh;
+       int                     rc;
+       u32                     amount_left;
+       loff_t                  file_offset, file_offset_tmp;
+       unsigned int            amount;
+       ssize_t                 nread;
+
+       /* Get the starting Logical Block Address and check that it's
+        * not too big */
+       if (fsg->cmnd[0] == READ_6)
+               lba = get_unaligned_be24(&fsg->cmnd[1]);
+       else {
+               lba = get_unaligned_be32(&fsg->cmnd[2]);
+
+               /* We allow DPO (Disable Page Out = don't save data in the
+                * cache) and FUA (Force Unit Access = don't read from the
+                * cache), but we don't implement them. */
+               if ((fsg->cmnd[1] & ~0x18) != 0) {
+                       curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+                       return -EINVAL;
+               }
+       }
+       if (lba >= curlun->num_sectors) {
+               curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+               return -EINVAL;
+       }
+       file_offset = ((loff_t) lba) << curlun->blkbits;
+
+       /* Carry out the file reads */
+       amount_left = fsg->data_size_from_cmnd;
+       if (unlikely(amount_left == 0))
+               return -EIO;            // No default reply
+
+       for (;;) {
+
+               /* Figure out how much we need to read:
+                * Try to read the remaining amount.
+                * But don't read more than the buffer size.
+                * And don't try to read past the end of the file.
+                */
+               amount = min((unsigned int) amount_left, mod_data.buflen);
+               amount = min((loff_t) amount,
+                               curlun->file_length - file_offset);
+
+               /* Wait for the next buffer to become available */
+               bh = fsg->next_buffhd_to_fill;
+               while (bh->state != BUF_STATE_EMPTY) {
+                       rc = sleep_thread(fsg);
+                       if (rc)
+                               return rc;
+               }
+
+               /* If we were asked to read past the end of file,
+                * end with an empty buffer. */
+               if (amount == 0) {
+                       curlun->sense_data =
+                                       SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+                       curlun->sense_data_info = file_offset >> curlun->blkbits;
+                       curlun->info_valid = 1;
+                       bh->inreq->length = 0;
+                       bh->state = BUF_STATE_FULL;
+                       break;
+               }
+
+               /* Perform the read */
+               file_offset_tmp = file_offset;
+               nread = vfs_read(curlun->filp,
+                               (char __user *) bh->buf,
+                               amount, &file_offset_tmp);
+               VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
+                               (unsigned long long) file_offset,
+                               (int) nread);
+               if (signal_pending(current))
+                       return -EINTR;
+
+               if (nread < 0) {
+                       LDBG(curlun, "error in file read: %d\n",
+                                       (int) nread);
+                       nread = 0;
+               } else if (nread < amount) {
+                       LDBG(curlun, "partial file read: %d/%u\n",
+                                       (int) nread, amount);
+                       nread = round_down(nread, curlun->blksize);
+               }
+               file_offset  += nread;
+               amount_left  -= nread;
+               fsg->residue -= nread;
+
+               /* Except at the end of the transfer, nread will be
+                * equal to the buffer size, which is divisible by the
+                * bulk-in maxpacket size.
+                */
+               bh->inreq->length = nread;
+               bh->state = BUF_STATE_FULL;
+
+               /* If an error occurred, report it and its position */
+               if (nread < amount) {
+                       curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
+                       curlun->sense_data_info = file_offset >> curlun->blkbits;
+                       curlun->info_valid = 1;
+                       break;
+               }
+
+               if (amount_left == 0)
+                       break;          // No more left to read
+
+               /* Send this buffer and go read some more */
+               bh->inreq->zero = 0;
+               start_transfer(fsg, fsg->bulk_in, bh->inreq,
+                               &bh->inreq_busy, &bh->state);
+               fsg->next_buffhd_to_fill = bh->next;
+       }
+
+       return -EIO;            // No default reply
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int do_write(struct fsg_dev *fsg)
+{
+       struct fsg_lun          *curlun = fsg->curlun;
+       u32                     lba;
+       struct fsg_buffhd       *bh;
+       int                     get_some_more;
+       u32                     amount_left_to_req, amount_left_to_write;
+       loff_t                  usb_offset, file_offset, file_offset_tmp;
+       unsigned int            amount;
+       ssize_t                 nwritten;
+       int                     rc;
+
+       if (curlun->ro) {
+               curlun->sense_data = SS_WRITE_PROTECTED;
+               return -EINVAL;
+       }
+       spin_lock(&curlun->filp->f_lock);
+       curlun->filp->f_flags &= ~O_SYNC;       // Default is not to wait
+       spin_unlock(&curlun->filp->f_lock);
+
+       /* Get the starting Logical Block Address and check that it's
+        * not too big */
+       if (fsg->cmnd[0] == WRITE_6)
+               lba = get_unaligned_be24(&fsg->cmnd[1]);
+       else {
+               lba = get_unaligned_be32(&fsg->cmnd[2]);
+
+               /* We allow DPO (Disable Page Out = don't save data in the
+                * cache) and FUA (Force Unit Access = write directly to the
+                * medium).  We don't implement DPO; we implement FUA by
+                * performing synchronous output. */
+               if ((fsg->cmnd[1] & ~0x18) != 0) {
+                       curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+                       return -EINVAL;
+               }
+               /* FUA */
+               if (!curlun->nofua && (fsg->cmnd[1] & 0x08)) {
+                       spin_lock(&curlun->filp->f_lock);
+                       curlun->filp->f_flags |= O_DSYNC;
+                       spin_unlock(&curlun->filp->f_lock);
+               }
+       }
+       if (lba >= curlun->num_sectors) {
+               curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+               return -EINVAL;
+       }
+
+       /* Carry out the file writes */
+       get_some_more = 1;
+       file_offset = usb_offset = ((loff_t) lba) << curlun->blkbits;
+       amount_left_to_req = amount_left_to_write = fsg->data_size_from_cmnd;
+
+       while (amount_left_to_write > 0) {
+
+               /* Queue a request for more data from the host */
+               bh = fsg->next_buffhd_to_fill;
+               if (bh->state == BUF_STATE_EMPTY && get_some_more) {
+
+                       /* Figure out how much we want to get:
+                        * Try to get the remaining amount,
+                        * but not more than the buffer size.
+                        */
+                       amount = min(amount_left_to_req, mod_data.buflen);
+
+                       /* Beyond the end of the backing file? */
+                       if (usb_offset >= curlun->file_length) {
+                               get_some_more = 0;
+                               curlun->sense_data =
+                                       SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+                               curlun->sense_data_info = usb_offset >> curlun->blkbits;
+                               curlun->info_valid = 1;
+                               continue;
+                       }
+
+                       /* Get the next buffer */
+                       usb_offset += amount;
+                       fsg->usb_amount_left -= amount;
+                       amount_left_to_req -= amount;
+                       if (amount_left_to_req == 0)
+                               get_some_more = 0;
+
+                       /* Except at the end of the transfer, amount will be
+                        * equal to the buffer size, which is divisible by
+                        * the bulk-out maxpacket size.
+                        */
+                       set_bulk_out_req_length(fsg, bh, amount);
+                       start_transfer(fsg, fsg->bulk_out, bh->outreq,
+                                       &bh->outreq_busy, &bh->state);
+                       fsg->next_buffhd_to_fill = bh->next;
+                       continue;
+               }
+
+               /* Write the received data to the backing file */
+               bh = fsg->next_buffhd_to_drain;
+               if (bh->state == BUF_STATE_EMPTY && !get_some_more)
+                       break;                  // We stopped early
+               if (bh->state == BUF_STATE_FULL) {
+                       smp_rmb();
+                       fsg->next_buffhd_to_drain = bh->next;
+                       bh->state = BUF_STATE_EMPTY;
+
+                       /* Did something go wrong with the transfer? */
+                       if (bh->outreq->status != 0) {
+                               curlun->sense_data = SS_COMMUNICATION_FAILURE;
+                               curlun->sense_data_info = file_offset >> curlun->blkbits;
+                               curlun->info_valid = 1;
+                               break;
+                       }
+
+                       amount = bh->outreq->actual;
+                       if (curlun->file_length - file_offset < amount) {
+                               LERROR(curlun,
+       "write %u @ %llu beyond end %llu\n",
+       amount, (unsigned long long) file_offset,
+       (unsigned long long) curlun->file_length);
+                               amount = curlun->file_length - file_offset;
+                       }
+
+                       /* Don't accept excess data.  The spec doesn't say
+                        * what to do in this case.  We'll ignore the error.
+                        */
+                       amount = min(amount, bh->bulk_out_intended_length);
+
+                       /* Don't write a partial block */
+                       amount = round_down(amount, curlun->blksize);
+                       if (amount == 0)
+                               goto empty_write;
+
+                       /* Perform the write */
+                       file_offset_tmp = file_offset;
+                       nwritten = vfs_write(curlun->filp,
+                                       (char __user *) bh->buf,
+                                       amount, &file_offset_tmp);
+                       VLDBG(curlun, "file write %u @ %llu -> %d\n", amount,
+                                       (unsigned long long) file_offset,
+                                       (int) nwritten);
+                       if (signal_pending(current))
+                               return -EINTR;          // Interrupted!
+
+                       if (nwritten < 0) {
+                               LDBG(curlun, "error in file write: %d\n",
+                                               (int) nwritten);
+                               nwritten = 0;
+                       } else if (nwritten < amount) {
+                               LDBG(curlun, "partial file write: %d/%u\n",
+                                               (int) nwritten, amount);
+                               nwritten = round_down(nwritten, curlun->blksize);
+                       }
+                       file_offset += nwritten;
+                       amount_left_to_write -= nwritten;
+                       fsg->residue -= nwritten;
+
+                       /* If an error occurred, report it and its position */
+                       if (nwritten < amount) {
+                               curlun->sense_data = SS_WRITE_ERROR;
+                               curlun->sense_data_info = file_offset >> curlun->blkbits;
+                               curlun->info_valid = 1;
+                               break;
+                       }
+
+ empty_write:
+                       /* Did the host decide to stop early? */
+                       if (bh->outreq->actual < bh->bulk_out_intended_length) {
+                               fsg->short_packet_received = 1;
+                               break;
+                       }
+                       continue;
+               }
+
+               /* Wait for something to happen */
+               rc = sleep_thread(fsg);
+               if (rc)
+                       return rc;
+       }
+
+       return -EIO;            // No default reply
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int do_synchronize_cache(struct fsg_dev *fsg)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+       int             rc;
+
+       /* We ignore the requested LBA and write out all file's
+        * dirty data buffers. */
+       rc = fsg_lun_fsync_sub(curlun);
+       if (rc)
+               curlun->sense_data = SS_WRITE_ERROR;
+       return 0;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static void invalidate_sub(struct fsg_lun *curlun)
+{
+       struct file     *filp = curlun->filp;
+       struct inode    *inode = filp->f_path.dentry->d_inode;
+       unsigned long   rc;
+
+       rc = invalidate_mapping_pages(inode->i_mapping, 0, -1);
+       VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc);
+}
+
+static int do_verify(struct fsg_dev *fsg)
+{
+       struct fsg_lun          *curlun = fsg->curlun;
+       u32                     lba;
+       u32                     verification_length;
+       struct fsg_buffhd       *bh = fsg->next_buffhd_to_fill;
+       loff_t                  file_offset, file_offset_tmp;
+       u32                     amount_left;
+       unsigned int            amount;
+       ssize_t                 nread;
+
+       /* Get the starting Logical Block Address and check that it's
+        * not too big */
+       lba = get_unaligned_be32(&fsg->cmnd[2]);
+       if (lba >= curlun->num_sectors) {
+               curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+               return -EINVAL;
+       }
+
+       /* We allow DPO (Disable Page Out = don't save data in the
+        * cache) but we don't implement it. */
+       if ((fsg->cmnd[1] & ~0x10) != 0) {
+               curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+               return -EINVAL;
+       }
+
+       verification_length = get_unaligned_be16(&fsg->cmnd[7]);
+       if (unlikely(verification_length == 0))
+               return -EIO;            // No default reply
+
+       /* Prepare to carry out the file verify */
+       amount_left = verification_length << curlun->blkbits;
+       file_offset = ((loff_t) lba) << curlun->blkbits;
+
+       /* Write out all the dirty buffers before invalidating them */
+       fsg_lun_fsync_sub(curlun);
+       if (signal_pending(current))
+               return -EINTR;
+
+       invalidate_sub(curlun);
+       if (signal_pending(current))
+               return -EINTR;
+
+       /* Just try to read the requested blocks */
+       while (amount_left > 0) {
+
+               /* Figure out how much we need to read:
+                * Try to read the remaining amount, but not more than
+                * the buffer size.
+                * And don't try to read past the end of the file.
+                */
+               amount = min((unsigned int) amount_left, mod_data.buflen);
+               amount = min((loff_t) amount,
+                               curlun->file_length - file_offset);
+               if (amount == 0) {
+                       curlun->sense_data =
+                                       SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+                       curlun->sense_data_info = file_offset >> curlun->blkbits;
+                       curlun->info_valid = 1;
+                       break;
+               }
+
+               /* Perform the read */
+               file_offset_tmp = file_offset;
+               nread = vfs_read(curlun->filp,
+                               (char __user *) bh->buf,
+                               amount, &file_offset_tmp);
+               VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
+                               (unsigned long long) file_offset,
+                               (int) nread);
+               if (signal_pending(current))
+                       return -EINTR;
+
+               if (nread < 0) {
+                       LDBG(curlun, "error in file verify: %d\n",
+                                       (int) nread);
+                       nread = 0;
+               } else if (nread < amount) {
+                       LDBG(curlun, "partial file verify: %d/%u\n",
+                                       (int) nread, amount);
+                       nread = round_down(nread, curlun->blksize);
+               }
+               if (nread == 0) {
+                       curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
+                       curlun->sense_data_info = file_offset >> curlun->blkbits;
+                       curlun->info_valid = 1;
+                       break;
+               }
+               file_offset += nread;
+               amount_left -= nread;
+       }
+       return 0;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+       u8      *buf = (u8 *) bh->buf;
+
+       static char vendor_id[] = "Linux   ";
+       static char product_disk_id[] = "File-Stor Gadget";
+       static char product_cdrom_id[] = "File-CD Gadget  ";
+
+       if (!fsg->curlun) {             // Unsupported LUNs are okay
+               fsg->bad_lun_okay = 1;
+               memset(buf, 0, 36);
+               buf[0] = 0x7f;          // Unsupported, no device-type
+               buf[4] = 31;            // Additional length
+               return 36;
+       }
+
+       memset(buf, 0, 8);
+       buf[0] = (mod_data.cdrom ? TYPE_ROM : TYPE_DISK);
+       if (mod_data.removable)
+               buf[1] = 0x80;
+       buf[2] = 2;             // ANSI SCSI level 2
+       buf[3] = 2;             // SCSI-2 INQUIRY data format
+       buf[4] = 31;            // Additional length
+                               // No special options
+       sprintf(buf + 8, "%-8s%-16s%04x", vendor_id,
+                       (mod_data.cdrom ? product_cdrom_id :
+                               product_disk_id),
+                       mod_data.release);
+       return 36;
+}
+
+
+static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+       u8              *buf = (u8 *) bh->buf;
+       u32             sd, sdinfo;
+       int             valid;
+
+       /*
+        * From the SCSI-2 spec., section 7.9 (Unit attention condition):
+        *
+        * If a REQUEST SENSE command is received from an initiator
+        * with a pending unit attention condition (before the target
+        * generates the contingent allegiance condition), then the
+        * target shall either:
+        *   a) report any pending sense data and preserve the unit
+        *      attention condition on the logical unit, or,
+        *   b) report the unit attention condition, may discard any
+        *      pending sense data, and clear the unit attention
+        *      condition on the logical unit for that initiator.
+        *
+        * FSG normally uses option a); enable this code to use option b).
+        */
+#if 0
+       if (curlun && curlun->unit_attention_data != SS_NO_SENSE) {
+               curlun->sense_data = curlun->unit_attention_data;
+               curlun->unit_attention_data = SS_NO_SENSE;
+       }
+#endif
+
+       if (!curlun) {          // Unsupported LUNs are okay
+               fsg->bad_lun_okay = 1;
+               sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
+               sdinfo = 0;
+               valid = 0;
+       } else {
+               sd = curlun->sense_data;
+               sdinfo = curlun->sense_data_info;
+               valid = curlun->info_valid << 7;
+               curlun->sense_data = SS_NO_SENSE;
+               curlun->sense_data_info = 0;
+               curlun->info_valid = 0;
+       }
+
+       memset(buf, 0, 18);
+       buf[0] = valid | 0x70;                  // Valid, current error
+       buf[2] = SK(sd);
+       put_unaligned_be32(sdinfo, &buf[3]);    /* Sense information */
+       buf[7] = 18 - 8;                        // Additional sense length
+       buf[12] = ASC(sd);
+       buf[13] = ASCQ(sd);
+       return 18;
+}
+
+
+static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+       u32             lba = get_unaligned_be32(&fsg->cmnd[2]);
+       int             pmi = fsg->cmnd[8];
+       u8              *buf = (u8 *) bh->buf;
+
+       /* Check the PMI and LBA fields */
+       if (pmi > 1 || (pmi == 0 && lba != 0)) {
+               curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+               return -EINVAL;
+       }
+
+       put_unaligned_be32(curlun->num_sectors - 1, &buf[0]);
+                                               /* Max logical block */
+       put_unaligned_be32(curlun->blksize, &buf[4]);   /* Block length */
+       return 8;
+}
+
+
+static int do_read_header(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+       int             msf = fsg->cmnd[1] & 0x02;
+       u32             lba = get_unaligned_be32(&fsg->cmnd[2]);
+       u8              *buf = (u8 *) bh->buf;
+
+       if ((fsg->cmnd[1] & ~0x02) != 0) {              /* Mask away MSF */
+               curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+               return -EINVAL;
+       }
+       if (lba >= curlun->num_sectors) {
+               curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+               return -EINVAL;
+       }
+
+       memset(buf, 0, 8);
+       buf[0] = 0x01;          /* 2048 bytes of user data, rest is EC */
+       store_cdrom_address(&buf[4], msf, lba);
+       return 8;
+}
+
+
+static int do_read_toc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+       int             msf = fsg->cmnd[1] & 0x02;
+       int             start_track = fsg->cmnd[6];
+       u8              *buf = (u8 *) bh->buf;
+
+       if ((fsg->cmnd[1] & ~0x02) != 0 ||              /* Mask away MSF */
+                       start_track > 1) {
+               curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+               return -EINVAL;
+       }
+
+       memset(buf, 0, 20);
+       buf[1] = (20-2);                /* TOC data length */
+       buf[2] = 1;                     /* First track number */
+       buf[3] = 1;                     /* Last track number */
+       buf[5] = 0x16;                  /* Data track, copying allowed */
+       buf[6] = 0x01;                  /* Only track is number 1 */
+       store_cdrom_address(&buf[8], msf, 0);
+
+       buf[13] = 0x16;                 /* Lead-out track is data */
+       buf[14] = 0xAA;                 /* Lead-out track number */
+       store_cdrom_address(&buf[16], msf, curlun->num_sectors);
+       return 20;
+}
+
+
+static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+       int             mscmnd = fsg->cmnd[0];
+       u8              *buf = (u8 *) bh->buf;
+       u8              *buf0 = buf;
+       int             pc, page_code;
+       int             changeable_values, all_pages;
+       int             valid_page = 0;
+       int             len, limit;
+
+       if ((fsg->cmnd[1] & ~0x08) != 0) {              // Mask away DBD
+               curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+               return -EINVAL;
+       }
+       pc = fsg->cmnd[2] >> 6;
+       page_code = fsg->cmnd[2] & 0x3f;
+       if (pc == 3) {
+               curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED;
+               return -EINVAL;
+       }
+       changeable_values = (pc == 1);
+       all_pages = (page_code == 0x3f);
+
+       /* Write the mode parameter header.  Fixed values are: default
+        * medium type, no cache control (DPOFUA), and no block descriptors.
+        * The only variable value is the WriteProtect bit.  We will fill in
+        * the mode data length later. */
+       memset(buf, 0, 8);
+       if (mscmnd == MODE_SENSE) {
+               buf[2] = (curlun->ro ? 0x80 : 0x00);            // WP, DPOFUA
+               buf += 4;
+               limit = 255;
+       } else {                        // MODE_SENSE_10
+               buf[3] = (curlun->ro ? 0x80 : 0x00);            // WP, DPOFUA
+               buf += 8;
+               limit = 65535;          // Should really be mod_data.buflen
+       }
+
+       /* No block descriptors */
+
+       /* The mode pages, in numerical order.  The only page we support
+        * is the Caching page. */
+       if (page_code == 0x08 || all_pages) {
+               valid_page = 1;
+               buf[0] = 0x08;          // Page code
+               buf[1] = 10;            // Page length
+               memset(buf+2, 0, 10);   // None of the fields are changeable
+
+               if (!changeable_values) {
+                       buf[2] = 0x04;  // Write cache enable,
+                                       // Read cache not disabled
+                                       // No cache retention priorities
+                       put_unaligned_be16(0xffff, &buf[4]);
+                                       /* Don't disable prefetch */
+                                       /* Minimum prefetch = 0 */
+                       put_unaligned_be16(0xffff, &buf[8]);
+                                       /* Maximum prefetch */
+                       put_unaligned_be16(0xffff, &buf[10]);
+                                       /* Maximum prefetch ceiling */
+               }
+               buf += 12;
+       }
+
+       /* Check that a valid page was requested and the mode data length
+        * isn't too long. */
+       len = buf - buf0;
+       if (!valid_page || len > limit) {
+               curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+               return -EINVAL;
+       }
+
+       /*  Store the mode data length */
+       if (mscmnd == MODE_SENSE)
+               buf0[0] = len - 1;
+       else
+               put_unaligned_be16(len - 2, buf0);
+       return len;
+}
+
+
+static int do_start_stop(struct fsg_dev *fsg)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+       int             loej, start;
+
+       if (!mod_data.removable) {
+               curlun->sense_data = SS_INVALID_COMMAND;
+               return -EINVAL;
+       }
+
+       // int immed = fsg->cmnd[1] & 0x01;
+       loej = fsg->cmnd[4] & 0x02;
+       start = fsg->cmnd[4] & 0x01;
+
+#ifdef CONFIG_USB_FILE_STORAGE_TEST
+       if ((fsg->cmnd[1] & ~0x01) != 0 ||              // Mask away Immed
+                       (fsg->cmnd[4] & ~0x03) != 0) {  // Mask LoEj, Start
+               curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+               return -EINVAL;
+       }
+
+       if (!start) {
+
+               /* Are we allowed to unload the media? */
+               if (curlun->prevent_medium_removal) {
+                       LDBG(curlun, "unload attempt prevented\n");
+                       curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED;
+                       return -EINVAL;
+               }
+               if (loej) {             // Simulate an unload/eject
+                       up_read(&fsg->filesem);
+                       down_write(&fsg->filesem);
+                       fsg_lun_close(curlun);
+                       up_write(&fsg->filesem);
+                       down_read(&fsg->filesem);
+               }
+       } else {
+
+               /* Our emulation doesn't support mounting; the medium is
+                * available for use as soon as it is loaded. */
+               if (!fsg_lun_is_open(curlun)) {
+                       curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
+                       return -EINVAL;
+               }
+       }
+#endif
+       return 0;
+}
+
+
+static int do_prevent_allow(struct fsg_dev *fsg)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+       int             prevent;
+
+       if (!mod_data.removable) {
+               curlun->sense_data = SS_INVALID_COMMAND;
+               return -EINVAL;
+       }
+
+       prevent = fsg->cmnd[4] & 0x01;
+       if ((fsg->cmnd[4] & ~0x01) != 0) {              // Mask away Prevent
+               curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+               return -EINVAL;
+       }
+
+       if (curlun->prevent_medium_removal && !prevent)
+               fsg_lun_fsync_sub(curlun);
+       curlun->prevent_medium_removal = prevent;
+       return 0;
+}
+
+
+static int do_read_format_capacities(struct fsg_dev *fsg,
+                       struct fsg_buffhd *bh)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+       u8              *buf = (u8 *) bh->buf;
+
+       buf[0] = buf[1] = buf[2] = 0;
+       buf[3] = 8;             // Only the Current/Maximum Capacity Descriptor
+       buf += 4;
+
+       put_unaligned_be32(curlun->num_sectors, &buf[0]);
+                                               /* Number of blocks */
+       put_unaligned_be32(curlun->blksize, &buf[4]);   /* Block length */
+       buf[4] = 0x02;                          /* Current capacity */
+       return 12;
+}
+
+
+static int do_mode_select(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+       struct fsg_lun  *curlun = fsg->curlun;
+
+       /* We don't support MODE SELECT */
+       curlun->sense_data = SS_INVALID_COMMAND;
+       return -EINVAL;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int halt_bulk_in_endpoint(struct fsg_dev *fsg)
+{
+       int     rc;
+
+       rc = fsg_set_halt(fsg, fsg->bulk_in);
+       if (rc == -EAGAIN)
+               VDBG(fsg, "delayed bulk-in endpoint halt\n");
+       while (rc != 0) {
+               if (rc != -EAGAIN) {
+                       WARNING(fsg, "usb_ep_set_halt -> %d\n", rc);
+                       rc = 0;
+                       break;
+               }
+
+               /* Wait for a short time and then try again */
+               if (msleep_interruptible(100) != 0)
+                       return -EINTR;
+               rc = usb_ep_set_halt(fsg->bulk_in);
+       }
+       return rc;
+}
+
+static int wedge_bulk_in_endpoint(struct fsg_dev *fsg)
+{
+       int     rc;
+
+       DBG(fsg, "bulk-in set wedge\n");
+       rc = usb_ep_set_wedge(fsg->bulk_in);
+       if (rc == -EAGAIN)
+               VDBG(fsg, "delayed bulk-in endpoint wedge\n");
+       while (rc != 0) {
+               if (rc != -EAGAIN) {
+                       WARNING(fsg, "usb_ep_set_wedge -> %d\n", rc);
+                       rc = 0;
+                       break;
+               }
+
+               /* Wait for a short time and then try again */
+               if (msleep_interruptible(100) != 0)
+                       return -EINTR;
+               rc = usb_ep_set_wedge(fsg->bulk_in);
+       }
+       return rc;
+}
+
+static int throw_away_data(struct fsg_dev *fsg)
+{
+       struct fsg_buffhd       *bh;
+       u32                     amount;
+       int                     rc;
+
+       while ((bh = fsg->next_buffhd_to_drain)->state != BUF_STATE_EMPTY ||
+                       fsg->usb_amount_left > 0) {
+
+               /* Throw away the data in a filled buffer */
+               if (bh->state == BUF_STATE_FULL) {
+                       smp_rmb();
+                       bh->state = BUF_STATE_EMPTY;
+                       fsg->next_buffhd_to_drain = bh->next;
+
+                       /* A short packet or an error ends everything */
+                       if (bh->outreq->actual < bh->bulk_out_intended_length ||
+                                       bh->outreq->status != 0) {
+                               raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
+                               return -EINTR;
+                       }
+                       continue;
+               }
+
+               /* Try to submit another request if we need one */
+               bh = fsg->next_buffhd_to_fill;
+               if (bh->state == BUF_STATE_EMPTY && fsg->usb_amount_left > 0) {
+                       amount = min(fsg->usb_amount_left,
+                                       (u32) mod_data.buflen);
+
+                       /* Except at the end of the transfer, amount will be
+                        * equal to the buffer size, which is divisible by
+                        * the bulk-out maxpacket size.
+                        */
+                       set_bulk_out_req_length(fsg, bh, amount);
+                       start_transfer(fsg, fsg->bulk_out, bh->outreq,
+                                       &bh->outreq_busy, &bh->state);
+                       fsg->next_buffhd_to_fill = bh->next;
+                       fsg->usb_amount_left -= amount;
+                       continue;
+               }
+
+               /* Otherwise wait for something to happen */
+               rc = sleep_thread(fsg);
+               if (rc)
+                       return rc;
+       }
+       return 0;
+}
+
+
+static int finish_reply(struct fsg_dev *fsg)
+{
+       struct fsg_buffhd       *bh = fsg->next_buffhd_to_fill;
+       int                     rc = 0;
+
+       switch (fsg->data_dir) {
+       case DATA_DIR_NONE:
+               break;                  // Nothing to send
+
+       /* If we don't know whether the host wants to read or write,
+        * this must be CB or CBI with an unknown command.  We mustn't
+        * try to send or receive any data.  So stall both bulk pipes
+        * if we can and wait for a reset. */
+       case DATA_DIR_UNKNOWN:
+               if (mod_data.can_stall) {
+                       fsg_set_halt(fsg, fsg->bulk_out);
+                       rc = halt_bulk_in_endpoint(fsg);
+               }
+               break;
+
+       /* All but the last buffer of data must have already been sent */
+       case DATA_DIR_TO_HOST:
+               if (fsg->data_size == 0)
+                       ;               // Nothing to send
+
+               /* If there's no residue, simply send the last buffer */
+               else if (fsg->residue == 0) {
+                       bh->inreq->zero = 0;
+                       start_transfer(fsg, fsg->bulk_in, bh->inreq,
+                                       &bh->inreq_busy, &bh->state);
+                       fsg->next_buffhd_to_fill = bh->next;
+               }
+
+               /* There is a residue.  For CB and CBI, simply mark the end
+                * of the data with a short packet.  However, if we are
+                * allowed to stall, there was no data at all (residue ==
+                * data_size), and the command failed (invalid LUN or
+                * sense data is set), then halt the bulk-in endpoint
+                * instead. */
+               else if (!transport_is_bbb()) {
+                       if (mod_data.can_stall &&
+                                       fsg->residue == fsg->data_size &&
+       (!fsg->curlun || fsg->curlun->sense_data != SS_NO_SENSE)) {
+                               bh->state = BUF_STATE_EMPTY;
+                               rc = halt_bulk_in_endpoint(fsg);
+                       } else {
+                               bh->inreq->zero = 1;
+                               start_transfer(fsg, fsg->bulk_in, bh->inreq,
+                                               &bh->inreq_busy, &bh->state);
+                               fsg->next_buffhd_to_fill = bh->next;
+                       }
+               }
+
+               /*
+                * For Bulk-only, mark the end of the data with a short
+                * packet.  If we are allowed to stall, halt the bulk-in
+                * endpoint.  (Note: This violates the Bulk-Only Transport
+                * specification, which requires us to pad the data if we
+                * don't halt the endpoint.  Presumably nobody will mind.)
+                */
+               else {
+                       bh->inreq->zero = 1;
+                       start_transfer(fsg, fsg->bulk_in, bh->inreq,
+                                       &bh->inreq_busy, &bh->state);
+                       fsg->next_buffhd_to_fill = bh->next;
+                       if (mod_data.can_stall)
+                               rc = halt_bulk_in_endpoint(fsg);
+               }
+               break;
+
+       /* We have processed all we want from the data the host has sent.
+        * There may still be outstanding bulk-out requests. */
+       case DATA_DIR_FROM_HOST:
+               if (fsg->residue == 0)
+                       ;               // Nothing to receive
+
+               /* Did the host stop sending unexpectedly early? */
+               else if (fsg->short_packet_received) {
+                       raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
+                       rc = -EINTR;
+               }
+
+               /* We haven't processed all the incoming data.  Even though
+                * we may be allowed to stall, doing so would cause a race.
+                * The controller may already have ACK'ed all the remaining
+                * bulk-out packets, in which case the host wouldn't see a
+                * STALL.  Not realizing the endpoint was halted, it wouldn't
+                * clear the halt -- leading to problems later on. */
+#if 0
+               else if (mod_data.can_stall) {
+                       fsg_set_halt(fsg, fsg->bulk_out);
+                       raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
+                       rc = -EINTR;
+               }
+#endif
+
+               /* We can't stall.  Read in the excess data and throw it
+                * all away. */
+               else
+                       rc = throw_away_data(fsg);
+               break;
+       }
+       return rc;
+}
+
+
+static int send_status(struct fsg_dev *fsg)
+{
+       struct fsg_lun          *curlun = fsg->curlun;
+       struct fsg_buffhd       *bh;
+       int                     rc;
+       u8                      status = US_BULK_STAT_OK;
+       u32                     sd, sdinfo = 0;
+
+       /* Wait for the next buffer to become available */
+       bh = fsg->next_buffhd_to_fill;
+       while (bh->state != BUF_STATE_EMPTY) {
+               rc = sleep_thread(fsg);
+               if (rc)
+                       return rc;
+       }
+
+       if (curlun) {
+               sd = curlun->sense_data;
+               sdinfo = curlun->sense_data_info;
+       } else if (fsg->bad_lun_okay)
+               sd = SS_NO_SENSE;
+       else
+               sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
+
+       if (fsg->phase_error) {
+               DBG(fsg, "sending phase-error status\n");
+               status = US_BULK_STAT_PHASE;
+               sd = SS_INVALID_COMMAND;
+       } else if (sd != SS_NO_SENSE) {
+               DBG(fsg, "sending command-failure status\n");
+               status = US_BULK_STAT_FAIL;
+               VDBG(fsg, "  sense data: SK x%02x, ASC x%02x, ASCQ x%02x;"
+                               "  info x%x\n",
+                               SK(sd), ASC(sd), ASCQ(sd), sdinfo);
+       }
+
+       if (transport_is_bbb()) {
+               struct bulk_cs_wrap     *csw = bh->buf;
+
+               /* Store and send the Bulk-only CSW */
+               csw->Signature = cpu_to_le32(US_BULK_CS_SIGN);
+               csw->Tag = fsg->tag;
+               csw->Residue = cpu_to_le32(fsg->residue);
+               csw->Status = status;
+
+               bh->inreq->length = US_BULK_CS_WRAP_LEN;
+               bh->inreq->zero = 0;
+               start_transfer(fsg, fsg->bulk_in, bh->inreq,
+                               &bh->inreq_busy, &bh->state);
+
+       } else if (mod_data.transport_type == USB_PR_CB) {
+
+               /* Control-Bulk transport has no status phase! */
+               return 0;
+
+       } else {                        // USB_PR_CBI
+               struct interrupt_data   *buf = bh->buf;
+
+               /* Store and send the Interrupt data.  UFI sends the ASC
+                * and ASCQ bytes.  Everything else sends a Type (which
+                * is always 0) and the status Value. */
+               if (mod_data.protocol_type == USB_SC_UFI) {
+                       buf->bType = ASC(sd);
+                       buf->bValue = ASCQ(sd);
+               } else {
+                       buf->bType = 0;
+                       buf->bValue = status;
+               }
+               fsg->intreq->length = CBI_INTERRUPT_DATA_LEN;
+
+               fsg->intr_buffhd = bh;          // Point to the right buffhd
+               fsg->intreq->buf = bh->inreq->buf;
+               fsg->intreq->context = bh;
+               start_transfer(fsg, fsg->intr_in, fsg->intreq,
+                               &fsg->intreq_busy, &bh->state);
+       }
+
+       fsg->next_buffhd_to_fill = bh->next;
+       return 0;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* Check whether the command is properly formed and whether its data size
+ * and direction agree with the values we already have. */
+static int check_command(struct fsg_dev *fsg, int cmnd_size,
+               enum data_direction data_dir, unsigned int mask,
+               int needs_medium, const char *name)
+{
+       int                     i;
+       int                     lun = fsg->cmnd[1] >> 5;
+       static const char       dirletter[4] = {'u', 'o', 'i', 'n'};
+       char                    hdlen[20];
+       struct fsg_lun          *curlun;
+
+       /* Adjust the expected cmnd_size for protocol encapsulation padding.
+        * Transparent SCSI doesn't pad. */
+       if (protocol_is_scsi())
+               ;
+
+       /* There's some disagreement as to whether RBC pads commands or not.
+        * We'll play it safe and accept either form. */
+       else if (mod_data.protocol_type == USB_SC_RBC) {
+               if (fsg->cmnd_size == 12)
+                       cmnd_size = 12;
+
+       /* All the other protocols pad to 12 bytes */
+       } else
+               cmnd_size = 12;
+
+       hdlen[0] = 0;
+       if (fsg->data_dir != DATA_DIR_UNKNOWN)
+               sprintf(hdlen, ", H%c=%u", dirletter[(int) fsg->data_dir],
+                               fsg->data_size);
+       VDBG(fsg, "SCSI command: %s;  Dc=%d, D%c=%u;  Hc=%d%s\n",
+                       name, cmnd_size, dirletter[(int) data_dir],
+                       fsg->data_size_from_cmnd, fsg->cmnd_size, hdlen);
+
+       /* We can't reply at all until we know the correct data direction
+        * and size. */
+       if (fsg->data_size_from_cmnd == 0)
+               data_dir = DATA_DIR_NONE;
+       if (fsg->data_dir == DATA_DIR_UNKNOWN) {        // CB or CBI
+               fsg->data_dir = data_dir;
+               fsg->data_size = fsg->data_size_from_cmnd;
+
+       } else {                                        // Bulk-only
+               if (fsg->data_size < fsg->data_size_from_cmnd) {
+
+                       /* Host data size < Device data size is a phase error.
+                        * Carry out the command, but only transfer as much
+                        * as we are allowed. */
+                       fsg->data_size_from_cmnd = fsg->data_size;
+                       fsg->phase_error = 1;
+               }
+       }
+       fsg->residue = fsg->usb_amount_left = fsg->data_size;
+
+       /* Conflicting data directions is a phase error */
+       if (fsg->data_dir != data_dir && fsg->data_size_from_cmnd > 0) {
+               fsg->phase_error = 1;
+               return -EINVAL;
+       }
+
+       /* Verify the length of the command itself */
+       if (cmnd_size != fsg->cmnd_size) {
+
+               /* Special case workaround: There are plenty of buggy SCSI
+                * implementations. Many have issues with cbw->Length
+                * field passing a wrong command size. For those cases we
+                * always try to work around the problem by using the length
+                * sent by the host side provided it is at least as large
+                * as the correct command length.
+                * Examples of such cases would be MS-Windows, which issues
+                * REQUEST SENSE with cbw->Length == 12 where it should
+                * be 6, and xbox360 issuing INQUIRY, TEST UNIT READY and
+                * REQUEST SENSE with cbw->Length == 10 where it should
+                * be 6 as well.
+                */
+               if (cmnd_size <= fsg->cmnd_size) {
+                       DBG(fsg, "%s is buggy! Expected length %d "
+                                       "but we got %d\n", name,
+                                       cmnd_size, fsg->cmnd_size);
+                       cmnd_size = fsg->cmnd_size;
+               } else {
+                       fsg->phase_error = 1;
+                       return -EINVAL;
+               }
+       }
+
+       /* Check that the LUN values are consistent */
+       if (transport_is_bbb()) {
+               if (fsg->lun != lun)
+                       DBG(fsg, "using LUN %d from CBW, "
+                                       "not LUN %d from CDB\n",
+                                       fsg->lun, lun);
+       }
+
+       /* Check the LUN */
+       curlun = fsg->curlun;
+       if (curlun) {
+               if (fsg->cmnd[0] != REQUEST_SENSE) {
+                       curlun->sense_data = SS_NO_SENSE;
+                       curlun->sense_data_info = 0;
+                       curlun->info_valid = 0;
+               }
+       } else {
+               fsg->bad_lun_okay = 0;
+
+               /* INQUIRY and REQUEST SENSE commands are explicitly allowed
+                * to use unsupported LUNs; all others may not. */
+               if (fsg->cmnd[0] != INQUIRY &&
+                               fsg->cmnd[0] != REQUEST_SENSE) {
+                       DBG(fsg, "unsupported LUN %d\n", fsg->lun);
+                       return -EINVAL;
+               }
+       }
+
+       /* If a unit attention condition exists, only INQUIRY and
+        * REQUEST SENSE commands are allowed; anything else must fail. */
+       if (curlun && curlun->unit_attention_data != SS_NO_SENSE &&
+                       fsg->cmnd[0] != INQUIRY &&
+                       fsg->cmnd[0] != REQUEST_SENSE) {
+               curlun->sense_data = curlun->unit_attention_data;
+               curlun->unit_attention_data = SS_NO_SENSE;
+               return -EINVAL;
+       }
+
+       /* Check that only command bytes listed in the mask are non-zero */
+       fsg->cmnd[1] &= 0x1f;                   // Mask away the LUN
+       for (i = 1; i < cmnd_size; ++i) {
+               if (fsg->cmnd[i] && !(mask & (1 << i))) {
+                       if (curlun)
+                               curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+                       return -EINVAL;
+               }
+       }
+
+       /* If the medium isn't mounted and the command needs to access
+        * it, return an error. */
+       if (curlun && !fsg_lun_is_open(curlun) && needs_medium) {
+               curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+/* wrapper of check_command for data size in blocks handling */
+static int check_command_size_in_blocks(struct fsg_dev *fsg, int cmnd_size,
+               enum data_direction data_dir, unsigned int mask,
+               int needs_medium, const char *name)
+{
+       if (fsg->curlun)
+               fsg->data_size_from_cmnd <<= fsg->curlun->blkbits;
+       return check_command(fsg, cmnd_size, data_dir,
+                       mask, needs_medium, name);
+}
+
+static int do_scsi_command(struct fsg_dev *fsg)
+{
+       struct fsg_buffhd       *bh;
+       int                     rc;
+       int                     reply = -EINVAL;
+       int                     i;
+       static char             unknown[16];
+
+       dump_cdb(fsg);
+
+       /* Wait for the next buffer to become available for data or status */
+       bh = fsg->next_buffhd_to_drain = fsg->next_buffhd_to_fill;
+       while (bh->state != BUF_STATE_EMPTY) {
+               rc = sleep_thread(fsg);
+               if (rc)
+                       return rc;
+       }
+       fsg->phase_error = 0;
+       fsg->short_packet_received = 0;
+
+       down_read(&fsg->filesem);       // We're using the backing file
+       switch (fsg->cmnd[0]) {
+
+       case INQUIRY:
+               fsg->data_size_from_cmnd = fsg->cmnd[4];
+               if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
+                               (1<<4), 0,
+                               "INQUIRY")) == 0)
+                       reply = do_inquiry(fsg, bh);
+               break;
+
+       case MODE_SELECT:
+               fsg->data_size_from_cmnd = fsg->cmnd[4];
+               if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
+                               (1<<1) | (1<<4), 0,
+                               "MODE SELECT(6)")) == 0)
+                       reply = do_mode_select(fsg, bh);
+               break;
+
+       case MODE_SELECT_10:
+               fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+               if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
+                               (1<<1) | (3<<7), 0,
+                               "MODE SELECT(10)")) == 0)
+                       reply = do_mode_select(fsg, bh);
+               break;
+
+       case MODE_SENSE:
+               fsg->data_size_from_cmnd = fsg->cmnd[4];
+               if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
+                               (1<<1) | (1<<2) | (1<<4), 0,
+                               "MODE SENSE(6)")) == 0)
+                       reply = do_mode_sense(fsg, bh);
+               break;
+
+       case MODE_SENSE_10:
+               fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+               if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+                               (1<<1) | (1<<2) | (3<<7), 0,
+                               "MODE SENSE(10)")) == 0)
+                       reply = do_mode_sense(fsg, bh);
+               break;
+
+       case ALLOW_MEDIUM_REMOVAL:
+               fsg->data_size_from_cmnd = 0;
+               if ((reply = check_command(fsg, 6, DATA_DIR_NONE,
+                               (1<<4), 0,
+                               "PREVENT-ALLOW MEDIUM REMOVAL")) == 0)
+                       reply = do_prevent_allow(fsg);
+               break;
+
+       case READ_6:
+               i = fsg->cmnd[4];
+               fsg->data_size_from_cmnd = (i == 0) ? 256 : i;
+               if ((reply = check_command_size_in_blocks(fsg, 6,
+                               DATA_DIR_TO_HOST,
+                               (7<<1) | (1<<4), 1,
+                               "READ(6)")) == 0)
+                       reply = do_read(fsg);
+               break;
+
+       case READ_10:
+               fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+               if ((reply = check_command_size_in_blocks(fsg, 10,
+                               DATA_DIR_TO_HOST,
+                               (1<<1) | (0xf<<2) | (3<<7), 1,
+                               "READ(10)")) == 0)
+                       reply = do_read(fsg);
+               break;
+
+       case READ_12:
+               fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]);
+               if ((reply = check_command_size_in_blocks(fsg, 12,
+                               DATA_DIR_TO_HOST,
+                               (1<<1) | (0xf<<2) | (0xf<<6), 1,
+                               "READ(12)")) == 0)
+                       reply = do_read(fsg);
+               break;
+
+       case READ_CAPACITY:
+               fsg->data_size_from_cmnd = 8;
+               if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+                               (0xf<<2) | (1<<8), 1,
+                               "READ CAPACITY")) == 0)
+                       reply = do_read_capacity(fsg, bh);
+               break;
+
+       case READ_HEADER:
+               if (!mod_data.cdrom)
+                       goto unknown_cmnd;
+               fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+               if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+                               (3<<7) | (0x1f<<1), 1,
+                               "READ HEADER")) == 0)
+                       reply = do_read_header(fsg, bh);
+               break;
+
+       case READ_TOC:
+               if (!mod_data.cdrom)
+                       goto unknown_cmnd;
+               fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+               if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+                               (7<<6) | (1<<1), 1,
+                               "READ TOC")) == 0)
+                       reply = do_read_toc(fsg, bh);
+               break;
+
+       case READ_FORMAT_CAPACITIES:
+               fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+               if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+                               (3<<7), 1,
+                               "READ FORMAT CAPACITIES")) == 0)
+                       reply = do_read_format_capacities(fsg, bh);
+               break;
+
+       case REQUEST_SENSE:
+               fsg->data_size_from_cmnd = fsg->cmnd[4];
+               if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
+                               (1<<4), 0,
+                               "REQUEST SENSE")) == 0)
+                       reply = do_request_sense(fsg, bh);
+               break;
+
+       case START_STOP:
+               fsg->data_size_from_cmnd = 0;
+               if ((reply = check_command(fsg, 6, DATA_DIR_NONE,
+                               (1<<1) | (1<<4), 0,
+                               "START-STOP UNIT")) == 0)
+                       reply = do_start_stop(fsg);
+               break;
+
+       case SYNCHRONIZE_CACHE:
+               fsg->data_size_from_cmnd = 0;
+               if ((reply = check_command(fsg, 10, DATA_DIR_NONE,
+                               (0xf<<2) | (3<<7), 1,
+                               "SYNCHRONIZE CACHE")) == 0)
+                       reply = do_synchronize_cache(fsg);
+               break;
+
+       case TEST_UNIT_READY:
+               fsg->data_size_from_cmnd = 0;
+               reply = check_command(fsg, 6, DATA_DIR_NONE,
+                               0, 1,
+                               "TEST UNIT READY");
+               break;
+
+       /* Although optional, this command is used by MS-Windows.  We
+        * support a minimal version: BytChk must be 0. */
+       case VERIFY:
+               fsg->data_size_from_cmnd = 0;
+               if ((reply = check_command(fsg, 10, DATA_DIR_NONE,
+                               (1<<1) | (0xf<<2) | (3<<7), 1,
+                               "VERIFY")) == 0)
+                       reply = do_verify(fsg);
+               break;
+
+       case WRITE_6:
+               i = fsg->cmnd[4];
+               fsg->data_size_from_cmnd = (i == 0) ? 256 : i;
+               if ((reply = check_command_size_in_blocks(fsg, 6,
+                               DATA_DIR_FROM_HOST,
+                               (7<<1) | (1<<4), 1,
+                               "WRITE(6)")) == 0)
+                       reply = do_write(fsg);
+               break;
+
+       case WRITE_10:
+               fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+               if ((reply = check_command_size_in_blocks(fsg, 10,
+                               DATA_DIR_FROM_HOST,
+                               (1<<1) | (0xf<<2) | (3<<7), 1,
+                               "WRITE(10)")) == 0)
+                       reply = do_write(fsg);
+               break;
+
+       case WRITE_12:
+               fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]);
+               if ((reply = check_command_size_in_blocks(fsg, 12,
+                               DATA_DIR_FROM_HOST,
+                               (1<<1) | (0xf<<2) | (0xf<<6), 1,
+                               "WRITE(12)")) == 0)
+                       reply = do_write(fsg);
+               break;
+
+       /* Some mandatory commands that we recognize but don't implement.
+        * They don't mean much in this setting.  It's left as an exercise
+        * for anyone interested to implement RESERVE and RELEASE in terms
+        * of Posix locks. */
+       case FORMAT_UNIT:
+       case RELEASE:
+       case RESERVE:
+       case SEND_DIAGNOSTIC:
+               // Fall through
+
+       default:
+ unknown_cmnd:
+               fsg->data_size_from_cmnd = 0;
+               sprintf(unknown, "Unknown x%02x", fsg->cmnd[0]);
+               if ((reply = check_command(fsg, fsg->cmnd_size,
+                               DATA_DIR_UNKNOWN, ~0, 0, unknown)) == 0) {
+                       fsg->curlun->sense_data = SS_INVALID_COMMAND;
+                       reply = -EINVAL;
+               }
+               break;
+       }
+       up_read(&fsg->filesem);
+
+       if (reply == -EINTR || signal_pending(current))
+               return -EINTR;
+
+       /* Set up the single reply buffer for finish_reply() */
+       if (reply == -EINVAL)
+               reply = 0;              // Error reply length
+       if (reply >= 0 && fsg->data_dir == DATA_DIR_TO_HOST) {
+               reply = min((u32) reply, fsg->data_size_from_cmnd);
+               bh->inreq->length = reply;
+               bh->state = BUF_STATE_FULL;
+               fsg->residue -= reply;
+       }                               // Otherwise it's already set
+
+       return 0;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+       struct usb_request              *req = bh->outreq;
+       struct bulk_cb_wrap     *cbw = req->buf;
+
+       /* Was this a real packet?  Should it be ignored? */
+       if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
+               return -EINVAL;
+
+       /* Is the CBW valid? */
+       if (req->actual != US_BULK_CB_WRAP_LEN ||
+                       cbw->Signature != cpu_to_le32(
+                               US_BULK_CB_SIGN)) {
+               DBG(fsg, "invalid CBW: len %u sig 0x%x\n",
+                               req->actual,
+                               le32_to_cpu(cbw->Signature));
+
+               /* The Bulk-only spec says we MUST stall the IN endpoint
+                * (6.6.1), so it's unavoidable.  It also says we must
+                * retain this state until the next reset, but there's
+                * no way to tell the controller driver it should ignore
+                * Clear-Feature(HALT) requests.
+                *
+                * We aren't required to halt the OUT endpoint; instead
+                * we can simply accept and discard any data received
+                * until the next reset. */
+               wedge_bulk_in_endpoint(fsg);
+               set_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
+               return -EINVAL;
+       }
+
+       /* Is the CBW meaningful? */
+       if (cbw->Lun >= FSG_MAX_LUNS || cbw->Flags & ~US_BULK_FLAG_IN ||
+                       cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) {
+               DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, "
+                               "cmdlen %u\n",
+                               cbw->Lun, cbw->Flags, cbw->Length);
+
+               /* We can do anything we want here, so let's stall the
+                * bulk pipes if we are allowed to. */
+               if (mod_data.can_stall) {
+                       fsg_set_halt(fsg, fsg->bulk_out);
+                       halt_bulk_in_endpoint(fsg);
+               }
+               return -EINVAL;
+       }
+
+       /* Save the command for later */
+       fsg->cmnd_size = cbw->Length;
+       memcpy(fsg->cmnd, cbw->CDB, fsg->cmnd_size);
+       if (cbw->Flags & US_BULK_FLAG_IN)
+               fsg->data_dir = DATA_DIR_TO_HOST;
+       else
+               fsg->data_dir = DATA_DIR_FROM_HOST;
+       fsg->data_size = le32_to_cpu(cbw->DataTransferLength);
+       if (fsg->data_size == 0)
+               fsg->data_dir = DATA_DIR_NONE;
+       fsg->lun = cbw->Lun;
+       fsg->tag = cbw->Tag;
+       return 0;
+}
+
+
+static int get_next_command(struct fsg_dev *fsg)
+{
+       struct fsg_buffhd       *bh;
+       int                     rc = 0;
+
+       if (transport_is_bbb()) {
+
+               /* Wait for the next buffer to become available */
+               bh = fsg->next_buffhd_to_fill;
+               while (bh->state != BUF_STATE_EMPTY) {
+                       rc = sleep_thread(fsg);
+                       if (rc)
+                               return rc;
+               }
+
+               /* Queue a request to read a Bulk-only CBW */
+               set_bulk_out_req_length(fsg, bh, US_BULK_CB_WRAP_LEN);
+               start_transfer(fsg, fsg->bulk_out, bh->outreq,
+                               &bh->outreq_busy, &bh->state);
+
+               /* We will drain the buffer in software, which means we
+                * can reuse it for the next filling.  No need to advance
+                * next_buffhd_to_fill. */
+
+               /* Wait for the CBW to arrive */
+               while (bh->state != BUF_STATE_FULL) {
+                       rc = sleep_thread(fsg);
+                       if (rc)
+                               return rc;
+               }
+               smp_rmb();
+               rc = received_cbw(fsg, bh);
+               bh->state = BUF_STATE_EMPTY;
+
+       } else {                // USB_PR_CB or USB_PR_CBI
+
+               /* Wait for the next command to arrive */
+               while (fsg->cbbuf_cmnd_size == 0) {
+                       rc = sleep_thread(fsg);
+                       if (rc)
+                               return rc;
+               }
+
+               /* Is the previous status interrupt request still busy?
+                * The host is allowed to skip reading the status,
+                * so we must cancel it. */
+               if (fsg->intreq_busy)
+                       usb_ep_dequeue(fsg->intr_in, fsg->intreq);
+
+               /* Copy the command and mark the buffer empty */
+               fsg->data_dir = DATA_DIR_UNKNOWN;
+               spin_lock_irq(&fsg->lock);
+               fsg->cmnd_size = fsg->cbbuf_cmnd_size;
+               memcpy(fsg->cmnd, fsg->cbbuf_cmnd, fsg->cmnd_size);
+               fsg->cbbuf_cmnd_size = 0;
+               spin_unlock_irq(&fsg->lock);
+
+               /* Use LUN from the command */
+               fsg->lun = fsg->cmnd[1] >> 5;
+       }
+
+       /* Update current lun */
+       if (fsg->lun >= 0 && fsg->lun < fsg->nluns)
+               fsg->curlun = &fsg->luns[fsg->lun];
+       else
+               fsg->curlun = NULL;
+
+       return rc;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep,
+               const struct usb_endpoint_descriptor *d)
+{
+       int     rc;
+
+       ep->driver_data = fsg;
+       ep->desc = d;
+       rc = usb_ep_enable(ep);
+       if (rc)
+               ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc);
+       return rc;
+}
+
+static int alloc_request(struct fsg_dev *fsg, struct usb_ep *ep,
+               struct usb_request **preq)
+{
+       *preq = usb_ep_alloc_request(ep, GFP_ATOMIC);
+       if (*preq)
+               return 0;
+       ERROR(fsg, "can't allocate request for %s\n", ep->name);
+       return -ENOMEM;
+}
+
+/*
+ * Reset interface setting and re-init endpoint state (toggle etc).
+ * Call with altsetting < 0 to disable the interface.  The only other
+ * available altsetting is 0, which enables the interface.
+ */
+static int do_set_interface(struct fsg_dev *fsg, int altsetting)
+{
+       int     rc = 0;
+       int     i;
+       const struct usb_endpoint_descriptor    *d;
+
+       if (fsg->running)
+               DBG(fsg, "reset interface\n");
+
+reset:
+       /* Deallocate the requests */
+       for (i = 0; i < fsg_num_buffers; ++i) {
+               struct fsg_buffhd *bh = &fsg->buffhds[i];
+
+               if (bh->inreq) {
+                       usb_ep_free_request(fsg->bulk_in, bh->inreq);
+                       bh->inreq = NULL;
+               }
+               if (bh->outreq) {
+                       usb_ep_free_request(fsg->bulk_out, bh->outreq);
+                       bh->outreq = NULL;
+               }
+       }
+       if (fsg->intreq) {
+               usb_ep_free_request(fsg->intr_in, fsg->intreq);
+               fsg->intreq = NULL;
+       }
+
+       /* Disable the endpoints */
+       if (fsg->bulk_in_enabled) {
+               usb_ep_disable(fsg->bulk_in);
+               fsg->bulk_in_enabled = 0;
+       }
+       if (fsg->bulk_out_enabled) {
+               usb_ep_disable(fsg->bulk_out);
+               fsg->bulk_out_enabled = 0;
+       }
+       if (fsg->intr_in_enabled) {
+               usb_ep_disable(fsg->intr_in);
+               fsg->intr_in_enabled = 0;
+       }
+
+       fsg->running = 0;
+       if (altsetting < 0 || rc != 0)
+               return rc;
+
+       DBG(fsg, "set interface %d\n", altsetting);
+
+       /* Enable the endpoints */
+       d = fsg_ep_desc(fsg->gadget,
+                       &fsg_fs_bulk_in_desc, &fsg_hs_bulk_in_desc,
+                       &fsg_ss_bulk_in_desc);
+       if ((rc = enable_endpoint(fsg, fsg->bulk_in, d)) != 0)
+               goto reset;
+       fsg->bulk_in_enabled = 1;
+
+       d = fsg_ep_desc(fsg->gadget,
+                       &fsg_fs_bulk_out_desc, &fsg_hs_bulk_out_desc,
+                       &fsg_ss_bulk_out_desc);
+       if ((rc = enable_endpoint(fsg, fsg->bulk_out, d)) != 0)
+               goto reset;
+       fsg->bulk_out_enabled = 1;
+       fsg->bulk_out_maxpacket = usb_endpoint_maxp(d);
+       clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
+
+       if (transport_is_cbi()) {
+               d = fsg_ep_desc(fsg->gadget,
+                               &fsg_fs_intr_in_desc, &fsg_hs_intr_in_desc,
+                               &fsg_ss_intr_in_desc);
+               if ((rc = enable_endpoint(fsg, fsg->intr_in, d)) != 0)
+                       goto reset;
+               fsg->intr_in_enabled = 1;
+       }
+
+       /* Allocate the requests */
+       for (i = 0; i < fsg_num_buffers; ++i) {
+               struct fsg_buffhd       *bh = &fsg->buffhds[i];
+
+               if ((rc = alloc_request(fsg, fsg->bulk_in, &bh->inreq)) != 0)
+                       goto reset;
+               if ((rc = alloc_request(fsg, fsg->bulk_out, &bh->outreq)) != 0)
+                       goto reset;
+               bh->inreq->buf = bh->outreq->buf = bh->buf;
+               bh->inreq->context = bh->outreq->context = bh;
+               bh->inreq->complete = bulk_in_complete;
+               bh->outreq->complete = bulk_out_complete;
+       }
+       if (transport_is_cbi()) {
+               if ((rc = alloc_request(fsg, fsg->intr_in, &fsg->intreq)) != 0)
+                       goto reset;
+               fsg->intreq->complete = intr_in_complete;
+       }
+
+       fsg->running = 1;
+       for (i = 0; i < fsg->nluns; ++i)
+               fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED;
+       return rc;
+}
+
+
+/*
+ * Change our operational configuration.  This code must agree with the code
+ * that returns config descriptors, and with interface altsetting code.
+ *
+ * It's also responsible for power management interactions.  Some
+ * configurations might not work with our current power sources.
+ * For now we just assume the gadget is always self-powered.
+ */
+static int do_set_config(struct fsg_dev *fsg, u8 new_config)
+{
+       int     rc = 0;
+
+       /* Disable the single interface */
+       if (fsg->config != 0) {
+               DBG(fsg, "reset config\n");
+               fsg->config = 0;
+               rc = do_set_interface(fsg, -1);
+       }
+
+       /* Enable the interface */
+       if (new_config != 0) {
+               fsg->config = new_config;
+               if ((rc = do_set_interface(fsg, 0)) != 0)
+                       fsg->config = 0;        // Reset on errors
+               else
+                       INFO(fsg, "%s config #%d\n",
+                            usb_speed_string(fsg->gadget->speed),
+                            fsg->config);
+       }
+       return rc;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static void handle_exception(struct fsg_dev *fsg)
+{
+       siginfo_t               info;
+       int                     sig;
+       int                     i;
+       int                     num_active;
+       struct fsg_buffhd       *bh;
+       enum fsg_state          old_state;
+       u8                      new_config;
+       struct fsg_lun          *curlun;
+       unsigned int            exception_req_tag;
+       int                     rc;
+
+       /* Clear the existing signals.  Anything but SIGUSR1 is converted
+        * into a high-priority EXIT exception. */
+       for (;;) {
+               sig = dequeue_signal_lock(current, &current->blocked, &info);
+               if (!sig)
+                       break;
+               if (sig != SIGUSR1) {
+                       if (fsg->state < FSG_STATE_EXIT)
+                               DBG(fsg, "Main thread exiting on signal\n");
+                       raise_exception(fsg, FSG_STATE_EXIT);
+               }
+       }
+
+       /* Cancel all the pending transfers */
+       if (fsg->intreq_busy)
+               usb_ep_dequeue(fsg->intr_in, fsg->intreq);
+       for (i = 0; i < fsg_num_buffers; ++i) {
+               bh = &fsg->buffhds[i];
+               if (bh->inreq_busy)
+                       usb_ep_dequeue(fsg->bulk_in, bh->inreq);
+               if (bh->outreq_busy)
+                       usb_ep_dequeue(fsg->bulk_out, bh->outreq);
+       }
+
+       /* Wait until everything is idle */
+       for (;;) {
+               num_active = fsg->intreq_busy;
+               for (i = 0; i < fsg_num_buffers; ++i) {
+                       bh = &fsg->buffhds[i];
+                       num_active += bh->inreq_busy + bh->outreq_busy;
+               }
+               if (num_active == 0)
+                       break;
+               if (sleep_thread(fsg))
+                       return;
+       }
+
+       /* Clear out the controller's fifos */
+       if (fsg->bulk_in_enabled)
+               usb_ep_fifo_flush(fsg->bulk_in);
+       if (fsg->bulk_out_enabled)
+               usb_ep_fifo_flush(fsg->bulk_out);
+       if (fsg->intr_in_enabled)
+               usb_ep_fifo_flush(fsg->intr_in);
+
+       /* Reset the I/O buffer states and pointers, the SCSI
+        * state, and the exception.  Then invoke the handler. */
+       spin_lock_irq(&fsg->lock);
+
+       for (i = 0; i < fsg_num_buffers; ++i) {
+               bh = &fsg->buffhds[i];
+               bh->state = BUF_STATE_EMPTY;
+       }
+       fsg->next_buffhd_to_fill = fsg->next_buffhd_to_drain =
+                       &fsg->buffhds[0];
+
+       exception_req_tag = fsg->exception_req_tag;
+       new_config = fsg->new_config;
+       old_state = fsg->state;
+
+       if (old_state == FSG_STATE_ABORT_BULK_OUT)
+               fsg->state = FSG_STATE_STATUS_PHASE;
+       else {
+               for (i = 0; i < fsg->nluns; ++i) {
+                       curlun = &fsg->luns[i];
+                       curlun->prevent_medium_removal = 0;
+                       curlun->sense_data = curlun->unit_attention_data =
+                                       SS_NO_SENSE;
+                       curlun->sense_data_info = 0;
+                       curlun->info_valid = 0;
+               }
+               fsg->state = FSG_STATE_IDLE;
+       }
+       spin_unlock_irq(&fsg->lock);
+
+       /* Carry out any extra actions required for the exception */
+       switch (old_state) {
+       default:
+               break;
+
+       case FSG_STATE_ABORT_BULK_OUT:
+               send_status(fsg);
+               spin_lock_irq(&fsg->lock);
+               if (fsg->state == FSG_STATE_STATUS_PHASE)
+                       fsg->state = FSG_STATE_IDLE;
+               spin_unlock_irq(&fsg->lock);
+               break;
+
+       case FSG_STATE_RESET:
+               /* In case we were forced against our will to halt a
+                * bulk endpoint, clear the halt now.  (The SuperH UDC
+                * requires this.) */
+               if (test_and_clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
+                       usb_ep_clear_halt(fsg->bulk_in);
+
+               if (transport_is_bbb()) {
+                       if (fsg->ep0_req_tag == exception_req_tag)
+                               ep0_queue(fsg); // Complete the status stage
+
+               } else if (transport_is_cbi())
+                       send_status(fsg);       // Status by interrupt pipe
+
+               /* Technically this should go here, but it would only be
+                * a waste of time.  Ditto for the INTERFACE_CHANGE and
+                * CONFIG_CHANGE cases. */
+               // for (i = 0; i < fsg->nluns; ++i)
+               //      fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED;
+               break;
+
+       case FSG_STATE_INTERFACE_CHANGE:
+               rc = do_set_interface(fsg, 0);
+               if (fsg->ep0_req_tag != exception_req_tag)
+                       break;
+               if (rc != 0)                    // STALL on errors
+                       fsg_set_halt(fsg, fsg->ep0);
+               else                            // Complete the status stage
+                       ep0_queue(fsg);
+               break;
+
+       case FSG_STATE_CONFIG_CHANGE:
+               rc = do_set_config(fsg, new_config);
+               if (fsg->ep0_req_tag != exception_req_tag)
+                       break;
+               if (rc != 0)                    // STALL on errors
+                       fsg_set_halt(fsg, fsg->ep0);
+               else                            // Complete the status stage
+                       ep0_queue(fsg);
+               break;
+
+       case FSG_STATE_DISCONNECT:
+               for (i = 0; i < fsg->nluns; ++i)
+                       fsg_lun_fsync_sub(fsg->luns + i);
+               do_set_config(fsg, 0);          // Unconfigured state
+               break;
+
+       case FSG_STATE_EXIT:
+       case FSG_STATE_TERMINATED:
+               do_set_config(fsg, 0);                  // Free resources
+               spin_lock_irq(&fsg->lock);
+               fsg->state = FSG_STATE_TERMINATED;      // Stop the thread
+               spin_unlock_irq(&fsg->lock);
+               break;
+       }
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int fsg_main_thread(void *fsg_)
+{
+       struct fsg_dev          *fsg = fsg_;
+
+       /* Allow the thread to be killed by a signal, but set the signal mask
+        * to block everything but INT, TERM, KILL, and USR1. */
+       allow_signal(SIGINT);
+       allow_signal(SIGTERM);
+       allow_signal(SIGKILL);
+       allow_signal(SIGUSR1);
+
+       /* Allow the thread to be frozen */
+       set_freezable();
+
+       /* Arrange for userspace references to be interpreted as kernel
+        * pointers.  That way we can pass a kernel pointer to a routine
+        * that expects a __user pointer and it will work okay. */
+       set_fs(get_ds());
+
+       /* The main loop */
+       while (fsg->state != FSG_STATE_TERMINATED) {
+               if (exception_in_progress(fsg) || signal_pending(current)) {
+                       handle_exception(fsg);
+                       continue;
+               }
+
+               if (!fsg->running) {
+                       sleep_thread(fsg);
+                       continue;
+               }
+
+               if (get_next_command(fsg))
+                       continue;
+
+               spin_lock_irq(&fsg->lock);
+               if (!exception_in_progress(fsg))
+                       fsg->state = FSG_STATE_DATA_PHASE;
+               spin_unlock_irq(&fsg->lock);
+
+               if (do_scsi_command(fsg) || finish_reply(fsg))
+                       continue;
+
+               spin_lock_irq(&fsg->lock);
+               if (!exception_in_progress(fsg))
+                       fsg->state = FSG_STATE_STATUS_PHASE;
+               spin_unlock_irq(&fsg->lock);
+
+               if (send_status(fsg))
+                       continue;
+
+               spin_lock_irq(&fsg->lock);
+               if (!exception_in_progress(fsg))
+                       fsg->state = FSG_STATE_IDLE;
+               spin_unlock_irq(&fsg->lock);
+               }
+
+       spin_lock_irq(&fsg->lock);
+       fsg->thread_task = NULL;
+       spin_unlock_irq(&fsg->lock);
+
+       /* If we are exiting because of a signal, unregister the
+        * gadget driver. */
+       if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags))
+               usb_gadget_unregister_driver(&fsg_driver);
+
+       /* Let the unbind and cleanup routines know the thread has exited */
+       complete_and_exit(&fsg->thread_notifier, 0);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+
+/* The write permissions and store_xxx pointers are set in fsg_bind() */
+static DEVICE_ATTR(ro, 0444, fsg_show_ro, NULL);
+static DEVICE_ATTR(nofua, 0644, fsg_show_nofua, NULL);
+static DEVICE_ATTR(file, 0444, fsg_show_file, NULL);
+
+
+/*-------------------------------------------------------------------------*/
+
+static void fsg_release(struct kref *ref)
+{
+       struct fsg_dev  *fsg = container_of(ref, struct fsg_dev, ref);
+
+       kfree(fsg->luns);
+       kfree(fsg);
+}
+
+static void lun_release(struct device *dev)
+{
+       struct rw_semaphore     *filesem = dev_get_drvdata(dev);
+       struct fsg_dev          *fsg =
+               container_of(filesem, struct fsg_dev, filesem);
+
+       kref_put(&fsg->ref, fsg_release);
+}
+
+static void /* __init_or_exit */ fsg_unbind(struct usb_gadget *gadget)
+{
+       struct fsg_dev          *fsg = get_gadget_data(gadget);
+       int                     i;
+       struct fsg_lun          *curlun;
+       struct usb_request      *req = fsg->ep0req;
+
+       DBG(fsg, "unbind\n");
+       clear_bit(REGISTERED, &fsg->atomic_bitflags);
+
+       /* If the thread isn't already dead, tell it to exit now */
+       if (fsg->state != FSG_STATE_TERMINATED) {
+               raise_exception(fsg, FSG_STATE_EXIT);
+               wait_for_completion(&fsg->thread_notifier);
+
+               /* The cleanup routine waits for this completion also */
+               complete(&fsg->thread_notifier);
+       }
+
+       /* Unregister the sysfs attribute files and the LUNs */
+       for (i = 0; i < fsg->nluns; ++i) {
+               curlun = &fsg->luns[i];
+               if (curlun->registered) {
+                       device_remove_file(&curlun->dev, &dev_attr_nofua);
+                       device_remove_file(&curlun->dev, &dev_attr_ro);
+                       device_remove_file(&curlun->dev, &dev_attr_file);
+                       fsg_lun_close(curlun);
+                       device_unregister(&curlun->dev);
+                       curlun->registered = 0;
+               }
+       }
+
+       /* Free the data buffers */
+       for (i = 0; i < fsg_num_buffers; ++i)
+               kfree(fsg->buffhds[i].buf);
+
+       /* Free the request and buffer for endpoint 0 */
+       if (req) {
+               kfree(req->buf);
+               usb_ep_free_request(fsg->ep0, req);
+       }
+
+       set_gadget_data(gadget, NULL);
+}
+
+
+static int __init check_parameters(struct fsg_dev *fsg)
+{
+       int     prot;
+       int     gcnum;
+
+       /* Store the default values */
+       mod_data.transport_type = USB_PR_BULK;
+       mod_data.transport_name = "Bulk-only";
+       mod_data.protocol_type = USB_SC_SCSI;
+       mod_data.protocol_name = "Transparent SCSI";
+
+       /* Some peripheral controllers are known not to be able to
+        * halt bulk endpoints correctly.  If one of them is present,
+        * disable stalls.
+        */
+       if (gadget_is_at91(fsg->gadget))
+               mod_data.can_stall = 0;
+
+       if (mod_data.release == 0xffff) {       // Parameter wasn't set
+               gcnum = usb_gadget_controller_number(fsg->gadget);
+               if (gcnum >= 0)
+                       mod_data.release = 0x0300 + gcnum;
+               else {
+                       WARNING(fsg, "controller '%s' not recognized\n",
+                               fsg->gadget->name);
+                       mod_data.release = 0x0399;
+               }
+       }
+
+       prot = simple_strtol(mod_data.protocol_parm, NULL, 0);
+
+#ifdef CONFIG_USB_FILE_STORAGE_TEST
+       if (strnicmp(mod_data.transport_parm, "BBB", 10) == 0) {
+               ;               // Use default setting
+       } else if (strnicmp(mod_data.transport_parm, "CB", 10) == 0) {
+               mod_data.transport_type = USB_PR_CB;
+               mod_data.transport_name = "Control-Bulk";
+       } else if (strnicmp(mod_data.transport_parm, "CBI", 10) == 0) {
+               mod_data.transport_type = USB_PR_CBI;
+               mod_data.transport_name = "Control-Bulk-Interrupt";
+       } else {
+               ERROR(fsg, "invalid transport: %s\n", mod_data.transport_parm);
+               return -EINVAL;
+       }
+
+       if (strnicmp(mod_data.protocol_parm, "SCSI", 10) == 0 ||
+                       prot == USB_SC_SCSI) {
+               ;               // Use default setting
+       } else if (strnicmp(mod_data.protocol_parm, "RBC", 10) == 0 ||
+                       prot == USB_SC_RBC) {
+               mod_data.protocol_type = USB_SC_RBC;
+               mod_data.protocol_name = "RBC";
+       } else if (strnicmp(mod_data.protocol_parm, "8020", 4) == 0 ||
+                       strnicmp(mod_data.protocol_parm, "ATAPI", 10) == 0 ||
+                       prot == USB_SC_8020) {
+               mod_data.protocol_type = USB_SC_8020;
+               mod_data.protocol_name = "8020i (ATAPI)";
+       } else if (strnicmp(mod_data.protocol_parm, "QIC", 3) == 0 ||
+                       prot == USB_SC_QIC) {
+               mod_data.protocol_type = USB_SC_QIC;
+               mod_data.protocol_name = "QIC-157";
+       } else if (strnicmp(mod_data.protocol_parm, "UFI", 10) == 0 ||
+                       prot == USB_SC_UFI) {
+               mod_data.protocol_type = USB_SC_UFI;
+               mod_data.protocol_name = "UFI";
+       } else if (strnicmp(mod_data.protocol_parm, "8070", 4) == 0 ||
+                       prot == USB_SC_8070) {
+               mod_data.protocol_type = USB_SC_8070;
+               mod_data.protocol_name = "8070i";
+       } else {
+               ERROR(fsg, "invalid protocol: %s\n", mod_data.protocol_parm);
+               return -EINVAL;
+       }
+
+       mod_data.buflen &= PAGE_CACHE_MASK;
+       if (mod_data.buflen <= 0) {
+               ERROR(fsg, "invalid buflen\n");
+               return -ETOOSMALL;
+       }
+
+#endif /* CONFIG_USB_FILE_STORAGE_TEST */
+
+       /* Serial string handling.
+        * On a real device, the serial string would be loaded
+        * from permanent storage. */
+       if (mod_data.serial) {
+               const char *ch;
+               unsigned len = 0;
+
+               /* Sanity check :
+                * The CB[I] specification limits the serial string to
+                * 12 uppercase hexadecimal characters.
+                * BBB need at least 12 uppercase hexadecimal characters,
+                * with a maximum of 126. */
+               for (ch = mod_data.serial; *ch; ++ch) {
+                       ++len;
+                       if ((*ch < '0' || *ch > '9') &&
+                           (*ch < 'A' || *ch > 'F')) { /* not uppercase hex */
+                               WARNING(fsg,
+                                       "Invalid serial string character: %c\n",
+                                       *ch);
+                               goto no_serial;
+                       }
+               }
+               if (len > 126 ||
+                   (mod_data.transport_type == USB_PR_BULK && len < 12) ||
+                   (mod_data.transport_type != USB_PR_BULK && len > 12)) {
+                       WARNING(fsg, "Invalid serial string length!\n");
+                       goto no_serial;
+               }
+               fsg_strings[FSG_STRING_SERIAL - 1].s = mod_data.serial;
+       } else {
+               WARNING(fsg, "No serial-number string provided!\n");
+ no_serial:
+               device_desc.iSerialNumber = 0;
+       }
+
+       return 0;
+}
+
+
+static int __init fsg_bind(struct usb_gadget *gadget)
+{
+       struct fsg_dev          *fsg = the_fsg;
+       int                     rc;
+       int                     i;
+       struct fsg_lun          *curlun;
+       struct usb_ep           *ep;
+       struct usb_request      *req;
+       char                    *pathbuf, *p;
+
+       fsg->gadget = gadget;
+       set_gadget_data(gadget, fsg);
+       fsg->ep0 = gadget->ep0;
+       fsg->ep0->driver_data = fsg;
+
+       if ((rc = check_parameters(fsg)) != 0)
+               goto out;
+
+       if (mod_data.removable) {       // Enable the store_xxx attributes
+               dev_attr_file.attr.mode = 0644;
+               dev_attr_file.store = fsg_store_file;
+               if (!mod_data.cdrom) {
+                       dev_attr_ro.attr.mode = 0644;
+                       dev_attr_ro.store = fsg_store_ro;
+               }
+       }
+
+       /* Only for removable media? */
+       dev_attr_nofua.attr.mode = 0644;
+       dev_attr_nofua.store = fsg_store_nofua;
+
+       /* Find out how many LUNs there should be */
+       i = mod_data.nluns;
+       if (i == 0)
+               i = max(mod_data.num_filenames, 1u);
+       if (i > FSG_MAX_LUNS) {
+               ERROR(fsg, "invalid number of LUNs: %d\n", i);
+               rc = -EINVAL;
+               goto out;
+       }
+
+       /* Create the LUNs, open their backing files, and register the
+        * LUN devices in sysfs. */
+       fsg->luns = kzalloc(i * sizeof(struct fsg_lun), GFP_KERNEL);
+       if (!fsg->luns) {
+               rc = -ENOMEM;
+               goto out;
+       }
+       fsg->nluns = i;
+
+       for (i = 0; i < fsg->nluns; ++i) {
+               curlun = &fsg->luns[i];
+               curlun->cdrom = !!mod_data.cdrom;
+               curlun->ro = mod_data.cdrom || mod_data.ro[i];
+               curlun->initially_ro = curlun->ro;
+               curlun->removable = mod_data.removable;
+               curlun->nofua = mod_data.nofua[i];
+               curlun->dev.release = lun_release;
+               curlun->dev.parent = &gadget->dev;
+               curlun->dev.driver = &fsg_driver.driver;
+               dev_set_drvdata(&curlun->dev, &fsg->filesem);
+               dev_set_name(&curlun->dev,"%s-lun%d",
+                            dev_name(&gadget->dev), i);
+
+               kref_get(&fsg->ref);
+               rc = device_register(&curlun->dev);
+               if (rc) {
+                       INFO(fsg, "failed to register LUN%d: %d\n", i, rc);
+                       put_device(&curlun->dev);
+                       goto out;
+               }
+               curlun->registered = 1;
+
+               rc = device_create_file(&curlun->dev, &dev_attr_ro);
+               if (rc)
+                       goto out;
+               rc = device_create_file(&curlun->dev, &dev_attr_nofua);
+               if (rc)
+                       goto out;
+               rc = device_create_file(&curlun->dev, &dev_attr_file);
+               if (rc)
+                       goto out;
+
+               if (mod_data.file[i] && *mod_data.file[i]) {
+                       rc = fsg_lun_open(curlun, mod_data.file[i]);
+                       if (rc)
+                               goto out;
+               } else if (!mod_data.removable) {
+                       ERROR(fsg, "no file given for LUN%d\n", i);
+                       rc = -EINVAL;
+                       goto out;
+               }
+       }
+
+       /* Find all the endpoints we will use */
+       usb_ep_autoconfig_reset(gadget);
+       ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc);
+       if (!ep)
+               goto autoconf_fail;
+       ep->driver_data = fsg;          // claim the endpoint
+       fsg->bulk_in = ep;
+
+       ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc);
+       if (!ep)
+               goto autoconf_fail;
+       ep->driver_data = fsg;          // claim the endpoint
+       fsg->bulk_out = ep;
+
+       if (transport_is_cbi()) {
+               ep = usb_ep_autoconfig(gadget, &fsg_fs_intr_in_desc);
+               if (!ep)
+                       goto autoconf_fail;
+               ep->driver_data = fsg;          // claim the endpoint
+               fsg->intr_in = ep;
+       }
+
+       /* Fix up the descriptors */
+       device_desc.idVendor = cpu_to_le16(mod_data.vendor);
+       device_desc.idProduct = cpu_to_le16(mod_data.product);
+       device_desc.bcdDevice = cpu_to_le16(mod_data.release);
+
+       i = (transport_is_cbi() ? 3 : 2);       // Number of endpoints
+       fsg_intf_desc.bNumEndpoints = i;
+       fsg_intf_desc.bInterfaceSubClass = mod_data.protocol_type;
+       fsg_intf_desc.bInterfaceProtocol = mod_data.transport_type;
+       fsg_fs_function[i + FSG_FS_FUNCTION_PRE_EP_ENTRIES] = NULL;
+
+       if (gadget_is_dualspeed(gadget)) {
+               fsg_hs_function[i + FSG_HS_FUNCTION_PRE_EP_ENTRIES] = NULL;
+
+               /* Assume endpoint addresses are the same for both speeds */
+               fsg_hs_bulk_in_desc.bEndpointAddress =
+                       fsg_fs_bulk_in_desc.bEndpointAddress;
+               fsg_hs_bulk_out_desc.bEndpointAddress =
+                       fsg_fs_bulk_out_desc.bEndpointAddress;
+               fsg_hs_intr_in_desc.bEndpointAddress =
+                       fsg_fs_intr_in_desc.bEndpointAddress;
+       }
+
+       if (gadget_is_superspeed(gadget)) {
+               unsigned                max_burst;
+
+               fsg_ss_function[i + FSG_SS_FUNCTION_PRE_EP_ENTRIES] = NULL;
+
+               /* Calculate bMaxBurst, we know packet size is 1024 */
+               max_burst = min_t(unsigned, mod_data.buflen / 1024, 15);
+
+               /* Assume endpoint addresses are the same for both speeds */
+               fsg_ss_bulk_in_desc.bEndpointAddress =
+                       fsg_fs_bulk_in_desc.bEndpointAddress;
+               fsg_ss_bulk_in_comp_desc.bMaxBurst = max_burst;
+
+               fsg_ss_bulk_out_desc.bEndpointAddress =
+                       fsg_fs_bulk_out_desc.bEndpointAddress;
+               fsg_ss_bulk_out_comp_desc.bMaxBurst = max_burst;
+       }
+
+       if (gadget_is_otg(gadget))
+               fsg_otg_desc.bmAttributes |= USB_OTG_HNP;
+
+       rc = -ENOMEM;
+
+       /* Allocate the request and buffer for endpoint 0 */
+       fsg->ep0req = req = usb_ep_alloc_request(fsg->ep0, GFP_KERNEL);
+       if (!req)
+               goto out;
+       req->buf = kmalloc(EP0_BUFSIZE, GFP_KERNEL);
+       if (!req->buf)
+               goto out;
+       req->complete = ep0_complete;
+
+       /* Allocate the data buffers */
+       for (i = 0; i < fsg_num_buffers; ++i) {
+               struct fsg_buffhd       *bh = &fsg->buffhds[i];
+
+               /* Allocate for the bulk-in endpoint.  We assume that
+                * the buffer will also work with the bulk-out (and
+                * interrupt-in) endpoint. */
+               bh->buf = kmalloc(mod_data.buflen, GFP_KERNEL);
+               if (!bh->buf)
+                       goto out;
+               bh->next = bh + 1;
+       }
+       fsg->buffhds[fsg_num_buffers - 1].next = &fsg->buffhds[0];
+
+       /* This should reflect the actual gadget power source */
+       usb_gadget_set_selfpowered(gadget);
+
+       snprintf(fsg_string_manufacturer, sizeof fsg_string_manufacturer,
+                       "%s %s with %s",
+                       init_utsname()->sysname, init_utsname()->release,
+                       gadget->name);
+
+       fsg->thread_task = kthread_create(fsg_main_thread, fsg,
+                       "file-storage-gadget");
+       if (IS_ERR(fsg->thread_task)) {
+               rc = PTR_ERR(fsg->thread_task);
+               goto out;
+       }
+
+       INFO(fsg, DRIVER_DESC ", version: " DRIVER_VERSION "\n");
+       INFO(fsg, "NOTE: This driver is deprecated.  "
+                       "Consider using g_mass_storage instead.\n");
+       INFO(fsg, "Number of LUNs=%d\n", fsg->nluns);
+
+       pathbuf = kmalloc(PATH_MAX, GFP_KERNEL);
+       for (i = 0; i < fsg->nluns; ++i) {
+               curlun = &fsg->luns[i];
+               if (fsg_lun_is_open(curlun)) {
+                       p = NULL;
+                       if (pathbuf) {
+                               p = d_path(&curlun->filp->f_path,
+                                          pathbuf, PATH_MAX);
+                               if (IS_ERR(p))
+                                       p = NULL;
+                       }
+                       LINFO(curlun, "ro=%d, nofua=%d, file: %s\n",
+                             curlun->ro, curlun->nofua, (p ? p : "(error)"));
+               }
+       }
+       kfree(pathbuf);
+
+       DBG(fsg, "transport=%s (x%02x)\n",
+                       mod_data.transport_name, mod_data.transport_type);
+       DBG(fsg, "protocol=%s (x%02x)\n",
+                       mod_data.protocol_name, mod_data.protocol_type);
+       DBG(fsg, "VendorID=x%04x, ProductID=x%04x, Release=x%04x\n",
+                       mod_data.vendor, mod_data.product, mod_data.release);
+       DBG(fsg, "removable=%d, stall=%d, cdrom=%d, buflen=%u\n",
+                       mod_data.removable, mod_data.can_stall,
+                       mod_data.cdrom, mod_data.buflen);
+       DBG(fsg, "I/O thread pid: %d\n", task_pid_nr(fsg->thread_task));
+
+       set_bit(REGISTERED, &fsg->atomic_bitflags);
+
+       /* Tell the thread to start working */
+       wake_up_process(fsg->thread_task);
+       return 0;
+
+autoconf_fail:
+       ERROR(fsg, "unable to autoconfigure all endpoints\n");
+       rc = -ENOTSUPP;
+
+out:
+       fsg->state = FSG_STATE_TERMINATED;      // The thread is dead
+       fsg_unbind(gadget);
+       complete(&fsg->thread_notifier);
+       return rc;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static void fsg_suspend(struct usb_gadget *gadget)
+{
+       struct fsg_dev          *fsg = get_gadget_data(gadget);
+
+       DBG(fsg, "suspend\n");
+       set_bit(SUSPENDED, &fsg->atomic_bitflags);
+}
+
+static void fsg_resume(struct usb_gadget *gadget)
+{
+       struct fsg_dev          *fsg = get_gadget_data(gadget);
+
+       DBG(fsg, "resume\n");
+       clear_bit(SUSPENDED, &fsg->atomic_bitflags);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_gadget_driver                fsg_driver = {
+       .max_speed      = USB_SPEED_SUPER,
+       .function       = (char *) fsg_string_product,
+       .unbind         = fsg_unbind,
+       .disconnect     = fsg_disconnect,
+       .setup          = fsg_setup,
+       .suspend        = fsg_suspend,
+       .resume         = fsg_resume,
+
+       .driver         = {
+               .name           = DRIVER_NAME,
+               .owner          = THIS_MODULE,
+               // .release = ...
+               // .suspend = ...
+               // .resume = ...
+       },
+};
+
+
+static int __init fsg_alloc(void)
+{
+       struct fsg_dev          *fsg;
+
+       fsg = kzalloc(sizeof *fsg +
+                     fsg_num_buffers * sizeof *(fsg->buffhds), GFP_KERNEL);
+
+       if (!fsg)
+               return -ENOMEM;
+       spin_lock_init(&fsg->lock);
+       init_rwsem(&fsg->filesem);
+       kref_init(&fsg->ref);
+       init_completion(&fsg->thread_notifier);
+
+       the_fsg = fsg;
+       return 0;
+}
+
+
+static int __init fsg_init(void)
+{
+       int             rc;
+       struct fsg_dev  *fsg;
+
+       rc = fsg_num_buffers_validate();
+       if (rc != 0)
+               return rc;
+
+       if ((rc = fsg_alloc()) != 0)
+               return rc;
+       fsg = the_fsg;
+       if ((rc = usb_gadget_probe_driver(&fsg_driver, fsg_bind)) != 0)
+               kref_put(&fsg->ref, fsg_release);
+       return rc;
+}
+module_init(fsg_init);
+
+
+static void __exit fsg_cleanup(void)
+{
+       struct fsg_dev  *fsg = the_fsg;
+
+       /* Unregister the driver iff the thread hasn't already done so */
+       if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags))
+               usb_gadget_unregister_driver(&fsg_driver);
+
+       /* Wait for the thread to finish up */
+       wait_for_completion(&fsg->thread_notifier);
+
+       kref_put(&fsg->ref, fsg_release);
+}
+module_exit(fsg_cleanup);
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -712,6 +712,16 @@ config USB_RENESAS_USBHS_HCD
          To compile this driver as a module, choose M here: the
          module will be called renesas-usbhs.
 
+config USB_DWCOTG
+       bool "Synopsis DWC host support"
+       depends on USB && (FIQ || ARM64)
+       help
+         The Synopsis DWC controller is a dual-role
+         host/peripheral/OTG ("On The Go") USB controllers.
+
+         Enable this option to support this IP in host controller mode.
+         If unsure, say N.
+
 config USB_IMX21_HCD
        tristate "i.MX21 HCD support"
        depends on ARM && ARCH_MXC
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -79,6 +79,7 @@ obj-$(CONFIG_USB_SL811_HCD)   += sl811-hcd
 obj-$(CONFIG_USB_SL811_CS)     += sl811_cs.o
 obj-$(CONFIG_USB_U132_HCD)     += u132-hcd.o
 obj-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
+obj-$(CONFIG_USB_DWCOTG)        += dwc_otg/ dwc_common_port/
 obj-$(CONFIG_USB_IMX21_HCD)    += imx21-hcd.o
 obj-$(CONFIG_USB_FSL_USB2)     += fsl-mph-dr-of.o
 obj-$(CONFIG_USB_EHCI_FSL)     += fsl-mph-dr-of.o
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/Makefile
@@ -0,0 +1,58 @@
+#
+# Makefile for DWC_common library
+#
+
+ifneq ($(KERNELRELEASE),)
+
+ccflags-y      += -DDWC_LINUX
+#ccflags-y     += -DDEBUG
+#ccflags-y     += -DDWC_DEBUG_REGS
+#ccflags-y     += -DDWC_DEBUG_MEMORY
+
+ccflags-y      += -DDWC_LIBMODULE
+ccflags-y      += -DDWC_CCLIB
+#ccflags-y     += -DDWC_CRYPTOLIB
+ccflags-y      += -DDWC_NOTIFYLIB
+ccflags-y      += -DDWC_UTFLIB
+
+obj-$(CONFIG_USB_DWCOTG)       += dwc_common_port_lib.o
+dwc_common_port_lib-objs := dwc_cc.o dwc_modpow.o dwc_dh.o \
+                           dwc_crypto.o dwc_notifier.o \
+                           dwc_common_linux.o dwc_mem.o
+
+kernrelwd := $(subst ., ,$(KERNELRELEASE))
+kernrel3 := $(word 1,$(kernrelwd)).$(word 2,$(kernrelwd)).$(word 3,$(kernrelwd))
+
+ifneq ($(kernrel3),2.6.20)
+# grayg - I only know that we use ccflags-y in 2.6.31 actually
+ccflags-y += $(CPPFLAGS)
+endif
+
+else
+
+#ifeq ($(KDIR),)
+#$(error Must give "KDIR=/path/to/kernel/source" on command line or in environment)
+#endif
+
+ifeq ($(ARCH),)
+$(error Must give "ARCH=<arch>" on command line or in environment. Also, if \
+ cross-compiling, must give "CROSS_COMPILE=/path/to/compiler/plus/tool-prefix-")
+endif
+
+ifeq ($(DOXYGEN),)
+DOXYGEN                := doxygen
+endif
+
+default:
+       $(MAKE) -C$(KDIR) M=$(PWD) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) modules
+
+docs:  $(wildcard *.[hc]) doc/doxygen.cfg
+       $(DOXYGEN) doc/doxygen.cfg
+
+tags:  $(wildcard *.[hc])
+       $(CTAGS) -e $(wildcard *.[hc]) $(wildcard linux/*.[hc]) $(wildcard $(KDIR)/include/linux/usb*.h)
+
+endif
+
+clean:
+       rm -rf *.o *.ko .*.cmd *.mod.c .*.o.d .*.o.tmp modules.order Module.markers Module.symvers .tmp_versions/
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/Makefile.fbsd
@@ -0,0 +1,17 @@
+CFLAGS += -I/sys/i386/compile/GENERIC -I/sys/i386/include -I/usr/include
+CFLAGS += -DDWC_FREEBSD
+CFLAGS += -DDEBUG
+#CFLAGS        += -DDWC_DEBUG_REGS
+#CFLAGS        += -DDWC_DEBUG_MEMORY
+
+#CFLAGS        += -DDWC_LIBMODULE
+#CFLAGS        += -DDWC_CCLIB
+#CFLAGS        += -DDWC_CRYPTOLIB
+#CFLAGS        += -DDWC_NOTIFYLIB
+#CFLAGS        += -DDWC_UTFLIB
+
+KMOD = dwc_common_port_lib
+SRCS = dwc_cc.c dwc_modpow.c dwc_dh.c dwc_crypto.c dwc_notifier.c \
+       dwc_common_fbsd.c dwc_mem.c
+
+.include <bsd.kmod.mk>
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/Makefile.linux
@@ -0,0 +1,49 @@
+#
+# Makefile for DWC_common library
+#
+ifneq ($(KERNELRELEASE),)
+
+ccflags-y      += -DDWC_LINUX
+#ccflags-y     += -DDEBUG
+#ccflags-y     += -DDWC_DEBUG_REGS
+#ccflags-y     += -DDWC_DEBUG_MEMORY
+
+ccflags-y      += -DDWC_LIBMODULE
+ccflags-y      += -DDWC_CCLIB
+ccflags-y      += -DDWC_CRYPTOLIB
+ccflags-y      += -DDWC_NOTIFYLIB
+ccflags-y      += -DDWC_UTFLIB
+
+obj-m                   := dwc_common_port_lib.o
+dwc_common_port_lib-objs := dwc_cc.o dwc_modpow.o dwc_dh.o \
+                           dwc_crypto.o dwc_notifier.o \
+                           dwc_common_linux.o dwc_mem.o
+
+else
+
+ifeq ($(KDIR),)
+$(error Must give "KDIR=/path/to/kernel/source" on command line or in environment)
+endif
+
+ifeq ($(ARCH),)
+$(error Must give "ARCH=<arch>" on command line or in environment. Also, if \
+ cross-compiling, must give "CROSS_COMPILE=/path/to/compiler/plus/tool-prefix-")
+endif
+
+ifeq ($(DOXYGEN),)
+DOXYGEN                := doxygen
+endif
+
+default:
+       $(MAKE) -C$(KDIR) M=$(PWD) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) modules
+
+docs:  $(wildcard *.[hc]) doc/doxygen.cfg
+       $(DOXYGEN) doc/doxygen.cfg
+
+tags:  $(wildcard *.[hc])
+       $(CTAGS) -e $(wildcard *.[hc]) $(wildcard linux/*.[hc]) $(wildcard $(KDIR)/include/linux/usb*.h)
+
+endif
+
+clean:
+       rm -rf *.o *.ko .*.cmd *.mod.c .*.o.d .*.o.tmp modules.order Module.markers Module.symvers .tmp_versions/
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/changes.txt
@@ -0,0 +1,174 @@
+
+dwc_read_reg32() and friends now take an additional parameter, a pointer to an
+IO context struct. The IO context struct should live in an os-dependent struct
+in your driver. As an example, the dwc_usb3 driver has an os-dependent struct
+named 'os_dep' embedded in the main device struct. So there these calls look
+like this:
+
+       dwc_read_reg32(&usb3_dev->os_dep.ioctx, &pcd->dev_global_regs->dcfg);
+
+       dwc_write_reg32(&usb3_dev->os_dep.ioctx,
+                       &pcd->dev_global_regs->dcfg, 0);
+
+Note that for the existing Linux driver ports, it is not necessary to actually
+define the 'ioctx' member in the os-dependent struct. Since Linux does not
+require an IO context, its macros for dwc_read_reg32() and friends do not
+use the context pointer, so it is optimized away by the compiler. But it is
+necessary to add the pointer parameter to all of the call sites, to be ready
+for any future ports (such as FreeBSD) which do require an IO context.
+
+
+Similarly, dwc_alloc(), dwc_alloc_atomic(), dwc_strdup(), and dwc_free() now
+take an additional parameter, a pointer to a memory context. Examples:
+
+       addr = dwc_alloc(&usb3_dev->os_dep.memctx, size);
+
+       dwc_free(&usb3_dev->os_dep.memctx, addr);
+
+Again, for the Linux ports, it is not necessary to actually define the memctx
+member, but it is necessary to add the pointer parameter to all of the call
+sites.
+
+
+Same for dwc_dma_alloc() and dwc_dma_free(). Examples:
+
+       virt_addr = dwc_dma_alloc(&usb3_dev->os_dep.dmactx, size, &phys_addr);
+
+       dwc_dma_free(&usb3_dev->os_dep.dmactx, size, virt_addr, phys_addr);
+
+
+Same for dwc_mutex_alloc() and dwc_mutex_free(). Examples:
+
+       mutex = dwc_mutex_alloc(&usb3_dev->os_dep.mtxctx);
+
+       dwc_mutex_free(&usb3_dev->os_dep.mtxctx, mutex);
+
+
+Same for dwc_spinlock_alloc() and dwc_spinlock_free(). Examples:
+
+       lock = dwc_spinlock_alloc(&usb3_dev->osdep.splctx);
+
+       dwc_spinlock_free(&usb3_dev->osdep.splctx, lock);
+
+
+Same for dwc_timer_alloc(). Example:
+
+       timer = dwc_timer_alloc(&usb3_dev->os_dep.tmrctx, "dwc_usb3_tmr1",
+                               cb_func, cb_data);
+
+
+Same for dwc_waitq_alloc(). Example:
+
+       waitq = dwc_waitq_alloc(&usb3_dev->os_dep.wtqctx);
+
+
+Same for dwc_thread_run(). Example:
+
+       thread = dwc_thread_run(&usb3_dev->os_dep.thdctx, func,
+                               "dwc_usb3_thd1", data);
+
+
+Same for dwc_workq_alloc(). Example:
+
+       workq = dwc_workq_alloc(&usb3_dev->osdep.wkqctx, "dwc_usb3_wkq1");
+
+
+Same for dwc_task_alloc(). Example:
+
+       task = dwc_task_alloc(&usb3_dev->os_dep.tskctx, "dwc_usb3_tsk1",
+                             cb_func, cb_data);
+
+
+In addition to the context pointer additions, a few core functions have had
+other changes made to their parameters:
+
+The 'flags' parameter to dwc_spinlock_irqsave() and dwc_spinunlock_irqrestore()
+has been changed from a uint64_t to a dwc_irqflags_t.
+
+dwc_thread_should_stop() now takes a 'dwc_thread_t *' parameter, because the
+FreeBSD equivalent of that function requires it.
+
+And, in addition to the context pointer, dwc_task_alloc() also adds a
+'char *name' parameter, to be consistent with dwc_thread_run() and
+dwc_workq_alloc(), and because the FreeBSD equivalent of that function
+requires a unique name.
+
+
+Here is a complete list of the core functions that now take a pointer to a
+context as their first parameter:
+
+       dwc_read_reg32
+       dwc_read_reg64
+       dwc_write_reg32
+       dwc_write_reg64
+       dwc_modify_reg32
+       dwc_modify_reg64
+       dwc_alloc
+       dwc_alloc_atomic
+       dwc_strdup
+       dwc_free
+       dwc_dma_alloc
+       dwc_dma_free
+       dwc_mutex_alloc
+       dwc_mutex_free
+       dwc_spinlock_alloc
+       dwc_spinlock_free
+       dwc_timer_alloc
+       dwc_waitq_alloc
+       dwc_thread_run
+       dwc_workq_alloc
+       dwc_task_alloc     Also adds a 'char *name' as its 2nd parameter
+
+And here are the core functions that have other changes to their parameters:
+
+       dwc_spinlock_irqsave      'flags' param is now a 'dwc_irqflags_t *'
+       dwc_spinunlock_irqrestore 'flags' param is now a 'dwc_irqflags_t'
+       dwc_thread_should_stop    Adds a 'dwc_thread_t *' parameter
+
+
+
+The changes to the core functions also require some of the other library
+functions to change:
+
+       dwc_cc_if_alloc() and dwc_cc_if_free() now take a 'void *memctx'
+       (for memory allocation) as the 1st param and a 'void *mtxctx'
+       (for mutex allocation) as the 2nd param.
+
+       dwc_cc_clear(), dwc_cc_add(), dwc_cc_change(), dwc_cc_remove(),
+       dwc_cc_data_for_save(), and dwc_cc_restore_from_data() now take a
+       'void *memctx' as the 1st param.
+
+       dwc_dh_modpow(), dwc_dh_pk(), and dwc_dh_derive_keys() now take a
+       'void *memctx' as the 1st param.
+
+       dwc_modpow() now takes a 'void *memctx' as the 1st param.
+
+       dwc_alloc_notification_manager() now takes a 'void *memctx' as the
+       1st param and a 'void *wkqctx' (for work queue allocation) as the 2nd
+       param, and also now returns an integer value that is non-zero if
+       allocation of its data structures or work queue fails.
+
+       dwc_register_notifier() now takes a 'void *memctx' as the 1st param.
+
+       dwc_memory_debug_start() now takes a 'void *mem_ctx' as the first
+       param, and also now returns an integer value that is non-zero if
+       allocation of its data structures fails.
+
+
+
+Other miscellaneous changes:
+
+The DEBUG_MEMORY and DEBUG_REGS #define's have been renamed to
+DWC_DEBUG_MEMORY and DWC_DEBUG_REGS.
+
+The following #define's have been added to allow selectively compiling library
+features:
+
+       DWC_CCLIB
+       DWC_CRYPTOLIB
+       DWC_NOTIFYLIB
+       DWC_UTFLIB
+
+A DWC_LIBMODULE #define has also been added. If this is not defined, then the
+module code in dwc_common_linux.c is not compiled in. This allows linking the
+library code directly into a driver module, instead of as a standalone module.
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/doc/doxygen.cfg
@@ -0,0 +1,270 @@
+# Doxyfile 1.4.5
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "Synopsys DWC Portability and Common Library for UWB"
+PROJECT_NUMBER         =
+OUTPUT_DIRECTORY       = doc
+CREATE_SUBDIRS         = NO
+OUTPUT_LANGUAGE        = English
+BRIEF_MEMBER_DESC      = YES
+REPEAT_BRIEF           = YES
+ABBREVIATE_BRIEF       = "The $name class" \
+                         "The $name widget" \
+                         "The $name file" \
+                         is \
+                         provides \
+                         specifies \
+                         contains \
+                         represents \
+                         a \
+                         an \
+                         the
+ALWAYS_DETAILED_SEC    = YES
+INLINE_INHERITED_MEMB  = NO
+FULL_PATH_NAMES        = NO
+STRIP_FROM_PATH        = ..
+STRIP_FROM_INC_PATH    =
+SHORT_NAMES            = NO
+JAVADOC_AUTOBRIEF      = YES
+MULTILINE_CPP_IS_BRIEF = NO
+DETAILS_AT_TOP         = YES
+INHERIT_DOCS           = YES
+SEPARATE_MEMBER_PAGES  = NO
+TAB_SIZE               = 8
+ALIASES                =
+OPTIMIZE_OUTPUT_FOR_C  = YES
+OPTIMIZE_OUTPUT_JAVA   = NO
+BUILTIN_STL_SUPPORT    = NO
+DISTRIBUTE_GROUP_DOC   = NO
+SUBGROUPING            = NO
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+EXTRACT_ALL            = NO
+EXTRACT_PRIVATE        = NO
+EXTRACT_STATIC         = YES
+EXTRACT_LOCAL_CLASSES  = NO
+EXTRACT_LOCAL_METHODS  = NO
+HIDE_UNDOC_MEMBERS     = NO
+HIDE_UNDOC_CLASSES     = NO
+HIDE_FRIEND_COMPOUNDS  = NO
+HIDE_IN_BODY_DOCS      = NO
+INTERNAL_DOCS          = NO
+CASE_SENSE_NAMES       = YES
+HIDE_SCOPE_NAMES       = NO
+SHOW_INCLUDE_FILES     = NO
+INLINE_INFO            = YES
+SORT_MEMBER_DOCS       = NO
+SORT_BRIEF_DOCS        = NO
+SORT_BY_SCOPE_NAME     = NO
+GENERATE_TODOLIST      = YES
+GENERATE_TESTLIST      = YES
+GENERATE_BUGLIST       = YES
+GENERATE_DEPRECATEDLIST= YES
+ENABLED_SECTIONS       =
+MAX_INITIALIZER_LINES  = 30
+SHOW_USED_FILES        = YES
+SHOW_DIRECTORIES       = YES
+FILE_VERSION_FILTER    =
+#---------------------------------------------------------------------------
+# configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+QUIET                  = YES
+WARNINGS               = YES
+WARN_IF_UNDOCUMENTED   = NO
+WARN_IF_DOC_ERROR      = YES
+WARN_NO_PARAMDOC       = YES
+WARN_FORMAT            = "$file:$line: $text"
+WARN_LOGFILE           =
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = .
+FILE_PATTERNS          = *.c \
+                         *.cc \
+                         *.cxx \
+                         *.cpp \
+                         *.c++ \
+                         *.d \
+                         *.java \
+                         *.ii \
+                         *.ixx \
+                         *.ipp \
+                         *.i++ \
+                         *.inl \
+                         *.h \
+                         *.hh \
+                         *.hxx \
+                         *.hpp \
+                         *.h++ \
+                         *.idl \
+                         *.odl \
+                         *.cs \
+                         *.php \
+                         *.php3 \
+                         *.inc \
+                         *.m \
+                         *.mm \
+                         *.dox \
+                         *.py \
+                         *.C \
+                         *.CC \
+                         *.C++ \
+                         *.II \
+                         *.I++ \
+                         *.H \
+                         *.HH \
+                         *.H++ \
+                         *.CS \
+                         *.PHP \
+                         *.PHP3 \
+                         *.M \
+                         *.MM \
+                         *.PY
+RECURSIVE              = NO
+EXCLUDE                =
+EXCLUDE_SYMLINKS       = NO
+EXCLUDE_PATTERNS       =
+EXAMPLE_PATH           =
+EXAMPLE_PATTERNS       = *
+EXAMPLE_RECURSIVE      = NO
+IMAGE_PATH             =
+INPUT_FILTER           =
+FILTER_PATTERNS        =
+FILTER_SOURCE_FILES    = NO
+#---------------------------------------------------------------------------
+# configuration options related to source browsing
+#---------------------------------------------------------------------------
+SOURCE_BROWSER         = NO
+INLINE_SOURCES         = NO
+STRIP_CODE_COMMENTS    = YES
+REFERENCED_BY_RELATION = YES
+REFERENCES_RELATION    = YES
+USE_HTAGS              = NO
+VERBATIM_HEADERS       = NO
+#---------------------------------------------------------------------------
+# configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+ALPHABETICAL_INDEX     = NO
+COLS_IN_ALPHA_INDEX    = 5
+IGNORE_PREFIX          =
+#---------------------------------------------------------------------------
+# configuration options related to the HTML output
+#---------------------------------------------------------------------------
+GENERATE_HTML          = YES
+HTML_OUTPUT            = html
+HTML_FILE_EXTENSION    = .html
+HTML_HEADER            =
+HTML_FOOTER            =
+HTML_STYLESHEET        =
+HTML_ALIGN_MEMBERS     = YES
+GENERATE_HTMLHELP      = NO
+CHM_FILE               =
+HHC_LOCATION           =
+GENERATE_CHI           = NO
+BINARY_TOC             = NO
+TOC_EXPAND             = NO
+DISABLE_INDEX          = NO
+ENUM_VALUES_PER_LINE   = 4
+GENERATE_TREEVIEW      = YES
+TREEVIEW_WIDTH         = 250
+#---------------------------------------------------------------------------
+# configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+GENERATE_LATEX         = NO
+LATEX_OUTPUT           = latex
+LATEX_CMD_NAME         = latex
+MAKEINDEX_CMD_NAME     = makeindex
+COMPACT_LATEX          = NO
+PAPER_TYPE             = a4wide
+EXTRA_PACKAGES         =
+LATEX_HEADER           =
+PDF_HYPERLINKS         = NO
+USE_PDFLATEX           = NO
+LATEX_BATCHMODE        = NO
+LATEX_HIDE_INDICES     = NO
+#---------------------------------------------------------------------------
+# configuration options related to the RTF output
+#---------------------------------------------------------------------------
+GENERATE_RTF           = NO
+RTF_OUTPUT             = rtf
+COMPACT_RTF            = NO
+RTF_HYPERLINKS         = NO
+RTF_STYLESHEET_FILE    =
+RTF_EXTENSIONS_FILE    =
+#---------------------------------------------------------------------------
+# configuration options related to the man page output
+#---------------------------------------------------------------------------
+GENERATE_MAN           = NO
+MAN_OUTPUT             = man
+MAN_EXTENSION          = .3
+MAN_LINKS              = NO
+#---------------------------------------------------------------------------
+# configuration options related to the XML output
+#---------------------------------------------------------------------------
+GENERATE_XML           = NO
+XML_OUTPUT             = xml
+XML_SCHEMA             =
+XML_DTD                =
+XML_PROGRAMLISTING     = YES
+#---------------------------------------------------------------------------
+# configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+GENERATE_AUTOGEN_DEF   = NO
+#---------------------------------------------------------------------------
+# configuration options related to the Perl module output
+#---------------------------------------------------------------------------
+GENERATE_PERLMOD       = NO
+PERLMOD_LATEX          = NO
+PERLMOD_PRETTY         = YES
+PERLMOD_MAKEVAR_PREFIX =
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor
+#---------------------------------------------------------------------------
+ENABLE_PREPROCESSING   = YES
+MACRO_EXPANSION        = NO
+EXPAND_ONLY_PREDEF     = NO
+SEARCH_INCLUDES        = YES
+INCLUDE_PATH           =
+INCLUDE_FILE_PATTERNS  =
+PREDEFINED             = DEBUG DEBUG_MEMORY
+EXPAND_AS_DEFINED      =
+SKIP_FUNCTION_MACROS   = YES
+#---------------------------------------------------------------------------
+# Configuration::additions related to external references
+#---------------------------------------------------------------------------
+TAGFILES               =
+GENERATE_TAGFILE       =
+ALLEXTERNALS           = NO
+EXTERNAL_GROUPS        = YES
+PERL_PATH              = /usr/bin/perl
+#---------------------------------------------------------------------------
+# Configuration options related to the dot tool
+#---------------------------------------------------------------------------
+CLASS_DIAGRAMS         = YES
+HIDE_UNDOC_RELATIONS   = YES
+HAVE_DOT               = NO
+CLASS_GRAPH            = YES
+COLLABORATION_GRAPH    = YES
+GROUP_GRAPHS           = YES
+UML_LOOK               = NO
+TEMPLATE_RELATIONS     = NO
+INCLUDE_GRAPH          = NO
+INCLUDED_BY_GRAPH      = YES
+CALL_GRAPH             = NO
+GRAPHICAL_HIERARCHY    = YES
+DIRECTORY_GRAPH        = YES
+DOT_IMAGE_FORMAT       = png
+DOT_PATH               =
+DOTFILE_DIRS           =
+MAX_DOT_GRAPH_DEPTH    = 1000
+DOT_TRANSPARENT        = NO
+DOT_MULTI_TARGETS      = NO
+GENERATE_LEGEND        = YES
+DOT_CLEANUP            = YES
+#---------------------------------------------------------------------------
+# Configuration::additions related to the search engine
+#---------------------------------------------------------------------------
+SEARCHENGINE           = NO
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_cc.c
@@ -0,0 +1,532 @@
+/* =========================================================================
+ * $File: //dwh/usb_iip/dev/software/dwc_common_port_2/dwc_cc.c $
+ * $Revision: #4 $
+ * $Date: 2010/11/04 $
+ * $Change: 1621692 $
+ *
+ * Synopsys Portability Library Software and documentation
+ * (hereinafter, "Software") is an Unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing
+ * between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for
+ * Licensed Product with Synopsys or any supplement thereto. You are
+ * permitted to use and redistribute this Software in source and binary
+ * forms, with or without modification, provided that redistributions
+ * of source code must retain this notice. You may not view, use,
+ * disclose, copy or distribute this file or any information contained
+ * herein except pursuant to this license grant from Synopsys. If you
+ * do not agree with this notice, including the disclaimer below, then
+ * you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL
+ * SYNOPSYS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================= */
+#ifdef DWC_CCLIB
+
+#include "dwc_cc.h"
+
+typedef struct dwc_cc
+{
+       uint32_t uid;
+       uint8_t chid[16];
+       uint8_t cdid[16];
+       uint8_t ck[16];
+       uint8_t *name;
+       uint8_t length;
+        DWC_CIRCLEQ_ENTRY(dwc_cc) list_entry;
+} dwc_cc_t;
+
+DWC_CIRCLEQ_HEAD(context_list, dwc_cc);
+
+/** The main structure for CC management.  */
+struct dwc_cc_if
+{
+       dwc_mutex_t *mutex;
+       char *filename;
+
+       unsigned is_host:1;
+
+       dwc_notifier_t *notifier;
+
+       struct context_list list;
+};
+
+#ifdef DEBUG
+static inline void dump_bytes(char *name, uint8_t *bytes, int len)
+{
+       int i;
+       DWC_PRINTF("%s: ", name);
+       for (i=0; i<len; i++) {
+               DWC_PRINTF("%02x ", bytes[i]);
+       }
+       DWC_PRINTF("\n");
+}
+#else
+#define dump_bytes(x...)
+#endif
+
+static dwc_cc_t *alloc_cc(void *mem_ctx, uint8_t *name, uint32_t length)
+{
+       dwc_cc_t *cc = dwc_alloc(mem_ctx, sizeof(dwc_cc_t));
+       if (!cc) {
+               return NULL;
+       }
+       DWC_MEMSET(cc, 0, sizeof(dwc_cc_t));
+
+       if (name) {
+               cc->length = length;
+               cc->name = dwc_alloc(mem_ctx, length);
+               if (!cc->name) {
+                       dwc_free(mem_ctx, cc);
+                       return NULL;
+               }
+
+               DWC_MEMCPY(cc->name, name, length);
+       }
+
+       return cc;
+}
+
+static void free_cc(void *mem_ctx, dwc_cc_t *cc)
+{
+       if (cc->name) {
+               dwc_free(mem_ctx, cc->name);
+       }
+       dwc_free(mem_ctx, cc);
+}
+
+static uint32_t next_uid(dwc_cc_if_t *cc_if)
+{
+       uint32_t uid = 0;
+       dwc_cc_t *cc;
+       DWC_CIRCLEQ_FOREACH(cc, &cc_if->list, list_entry) {
+               if (cc->uid > uid) {
+                       uid = cc->uid;
+               }
+       }
+
+       if (uid == 0) {
+               uid = 255;
+       }
+
+       return uid + 1;
+}
+
+static dwc_cc_t *cc_find(dwc_cc_if_t *cc_if, uint32_t uid)
+{
+       dwc_cc_t *cc;
+       DWC_CIRCLEQ_FOREACH(cc, &cc_if->list, list_entry) {
+               if (cc->uid == uid) {
+                       return cc;
+               }
+       }
+       return NULL;
+}
+
+static unsigned int cc_data_size(dwc_cc_if_t *cc_if)
+{
+       unsigned int size = 0;
+       dwc_cc_t *cc;
+       DWC_CIRCLEQ_FOREACH(cc, &cc_if->list, list_entry) {
+               size += (48 + 1);
+               if (cc->name) {
+                       size += cc->length;
+               }
+       }
+       return size;
+}
+
+static uint32_t cc_match_chid(dwc_cc_if_t *cc_if, uint8_t *chid)
+{
+       uint32_t uid = 0;
+       dwc_cc_t *cc;
+
+       DWC_CIRCLEQ_FOREACH(cc, &cc_if->list, list_entry) {
+               if (DWC_MEMCMP(cc->chid, chid, 16) == 0) {
+                       uid = cc->uid;
+                       break;
+               }
+       }
+       return uid;
+}
+static uint32_t cc_match_cdid(dwc_cc_if_t *cc_if, uint8_t *cdid)
+{
+       uint32_t uid = 0;
+       dwc_cc_t *cc;
+
+       DWC_CIRCLEQ_FOREACH(cc, &cc_if->list, list_entry) {
+               if (DWC_MEMCMP(cc->cdid, cdid, 16) == 0) {
+                       uid = cc->uid;
+                       break;
+               }
+       }
+       return uid;
+}
+
+/* Internal cc_add */
+static int32_t cc_add(void *mem_ctx, dwc_cc_if_t *cc_if, uint8_t *chid,
+                     uint8_t *cdid, uint8_t *ck, uint8_t *name, uint8_t length)
+{
+       dwc_cc_t *cc;
+       uint32_t uid;
+
+       if (cc_if->is_host) {
+               uid = cc_match_cdid(cc_if, cdid);
+       }
+       else {
+               uid = cc_match_chid(cc_if, chid);
+       }
+
+       if (uid) {
+               DWC_DEBUGC("Replacing previous connection context id=%d name=%p name_len=%d", uid, name, length);
+               cc = cc_find(cc_if, uid);
+       }
+       else {
+               cc = alloc_cc(mem_ctx, name, length);
+               cc->uid = next_uid(cc_if);
+               DWC_CIRCLEQ_INSERT_TAIL(&cc_if->list, cc, list_entry);
+       }
+
+       DWC_MEMCPY(&(cc->chid[0]), chid, 16);
+       DWC_MEMCPY(&(cc->cdid[0]), cdid, 16);
+       DWC_MEMCPY(&(cc->ck[0]), ck, 16);
+
+       DWC_DEBUGC("Added connection context id=%d name=%p name_len=%d", cc->uid, name, length);
+       dump_bytes("CHID", cc->chid, 16);
+       dump_bytes("CDID", cc->cdid, 16);
+       dump_bytes("CK", cc->ck, 16);
+       return cc->uid;
+}
+
+/* Internal cc_clear */
+static void cc_clear(void *mem_ctx, dwc_cc_if_t *cc_if)
+{
+       while (!DWC_CIRCLEQ_EMPTY(&cc_if->list)) {
+               dwc_cc_t *cc = DWC_CIRCLEQ_FIRST(&cc_if->list);
+               DWC_CIRCLEQ_REMOVE_INIT(&cc_if->list, cc, list_entry);
+               free_cc(mem_ctx, cc);
+       }
+}
+
+dwc_cc_if_t *dwc_cc_if_alloc(void *mem_ctx, void *mtx_ctx,
+                            dwc_notifier_t *notifier, unsigned is_host)
+{
+       dwc_cc_if_t *cc_if = NULL;
+
+       /* Allocate a common_cc_if structure */
+       cc_if = dwc_alloc(mem_ctx, sizeof(dwc_cc_if_t));
+
+       if (!cc_if)
+               return NULL;
+
+#if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES))
+       DWC_MUTEX_ALLOC_LINUX_DEBUG(cc_if->mutex);
+#else
+       cc_if->mutex = dwc_mutex_alloc(mtx_ctx);
+#endif
+       if (!cc_if->mutex) {
+               dwc_free(mem_ctx, cc_if);
+               return NULL;
+       }
+
+       DWC_CIRCLEQ_INIT(&cc_if->list);
+       cc_if->is_host = is_host;
+       cc_if->notifier = notifier;
+       return cc_if;
+}
+
+void dwc_cc_if_free(void *mem_ctx, void *mtx_ctx, dwc_cc_if_t *cc_if)
+{
+#if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES))
+       DWC_MUTEX_FREE(cc_if->mutex);
+#else
+       dwc_mutex_free(mtx_ctx, cc_if->mutex);
+#endif
+       cc_clear(mem_ctx, cc_if);
+       dwc_free(mem_ctx, cc_if);
+}
+
+static void cc_changed(dwc_cc_if_t *cc_if)
+{
+       if (cc_if->notifier) {
+               dwc_notify(cc_if->notifier, DWC_CC_LIST_CHANGED_NOTIFICATION, cc_if);
+       }
+}
+
+void dwc_cc_clear(void *mem_ctx, dwc_cc_if_t *cc_if)
+{
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       cc_clear(mem_ctx, cc_if);
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+       cc_changed(cc_if);
+}
+
+int32_t dwc_cc_add(void *mem_ctx, dwc_cc_if_t *cc_if, uint8_t *chid,
+                  uint8_t *cdid, uint8_t *ck, uint8_t *name, uint8_t length)
+{
+       uint32_t uid;
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       uid = cc_add(mem_ctx, cc_if, chid, cdid, ck, name, length);
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+       cc_changed(cc_if);
+
+       return uid;
+}
+
+void dwc_cc_change(void *mem_ctx, dwc_cc_if_t *cc_if, int32_t id, uint8_t *chid,
+                  uint8_t *cdid, uint8_t *ck, uint8_t *name, uint8_t length)
+{
+       dwc_cc_t* cc;
+
+       DWC_DEBUGC("Change connection context %d", id);
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       cc = cc_find(cc_if, id);
+       if (!cc) {
+               DWC_ERROR("Uid %d not found in cc list\n", id);
+               DWC_MUTEX_UNLOCK(cc_if->mutex);
+               return;
+       }
+
+       if (chid) {
+               DWC_MEMCPY(&(cc->chid[0]), chid, 16);
+       }
+       if (cdid) {
+               DWC_MEMCPY(&(cc->cdid[0]), cdid, 16);
+       }
+       if (ck) {
+               DWC_MEMCPY(&(cc->ck[0]), ck, 16);
+       }
+
+       if (name) {
+               if (cc->name) {
+                       dwc_free(mem_ctx, cc->name);
+               }
+               cc->name = dwc_alloc(mem_ctx, length);
+               if (!cc->name) {
+                       DWC_ERROR("Out of memory in dwc_cc_change()\n");
+                       DWC_MUTEX_UNLOCK(cc_if->mutex);
+                       return;
+               }
+               cc->length = length;
+               DWC_MEMCPY(cc->name, name, length);
+       }
+
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+
+       cc_changed(cc_if);
+
+       DWC_DEBUGC("Changed connection context id=%d\n", id);
+       dump_bytes("New CHID", cc->chid, 16);
+       dump_bytes("New CDID", cc->cdid, 16);
+       dump_bytes("New CK", cc->ck, 16);
+}
+
+void dwc_cc_remove(void *mem_ctx, dwc_cc_if_t *cc_if, int32_t id)
+{
+       dwc_cc_t *cc;
+
+       DWC_DEBUGC("Removing connection context %d", id);
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       cc = cc_find(cc_if, id);
+       if (!cc) {
+               DWC_ERROR("Uid %d not found in cc list\n", id);
+               DWC_MUTEX_UNLOCK(cc_if->mutex);
+               return;
+       }
+
+       DWC_CIRCLEQ_REMOVE_INIT(&cc_if->list, cc, list_entry);
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+       free_cc(mem_ctx, cc);
+
+       cc_changed(cc_if);
+}
+
+uint8_t *dwc_cc_data_for_save(void *mem_ctx, dwc_cc_if_t *cc_if, unsigned int *length)
+{
+       uint8_t *buf, *x;
+       uint8_t zero = 0;
+       dwc_cc_t *cc;
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       *length = cc_data_size(cc_if);
+       if (!(*length)) {
+               DWC_MUTEX_UNLOCK(cc_if->mutex);
+               return NULL;
+       }
+
+       DWC_DEBUGC("Creating data for saving (length=%d)", *length);
+
+       buf = dwc_alloc(mem_ctx, *length);
+       if (!buf) {
+               *length = 0;
+               DWC_MUTEX_UNLOCK(cc_if->mutex);
+               return NULL;
+       }
+
+       x = buf;
+       DWC_CIRCLEQ_FOREACH(cc, &cc_if->list, list_entry) {
+               DWC_MEMCPY(x, cc->chid, 16);
+               x += 16;
+               DWC_MEMCPY(x, cc->cdid, 16);
+               x += 16;
+               DWC_MEMCPY(x, cc->ck, 16);
+               x += 16;
+               if (cc->name) {
+                       DWC_MEMCPY(x, &cc->length, 1);
+                       x += 1;
+                       DWC_MEMCPY(x, cc->name, cc->length);
+                       x += cc->length;
+               }
+               else {
+                       DWC_MEMCPY(x, &zero, 1);
+                       x += 1;
+               }
+       }
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+
+       return buf;
+}
+
+void dwc_cc_restore_from_data(void *mem_ctx, dwc_cc_if_t *cc_if, uint8_t *data, uint32_t length)
+{
+       uint8_t name_length;
+       uint8_t *name;
+       uint8_t *chid;
+       uint8_t *cdid;
+       uint8_t *ck;
+       uint32_t i = 0;
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       cc_clear(mem_ctx, cc_if);
+
+       while (i < length) {
+               chid = &data[i];
+               i += 16;
+               cdid = &data[i];
+               i += 16;
+               ck = &data[i];
+               i += 16;
+
+               name_length = data[i];
+               i ++;
+
+               if (name_length) {
+                       name = &data[i];
+                       i += name_length;
+               }
+               else {
+                       name = NULL;
+               }
+
+               /* check to see if we haven't overflown the buffer */
+               if (i > length) {
+                       DWC_ERROR("Data format error while attempting to load CCs "
+                                 "(nlen=%d, iter=%d, buflen=%d).\n", name_length, i, length);
+                       break;
+               }
+
+               cc_add(mem_ctx, cc_if, chid, cdid, ck, name, name_length);
+       }
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+
+       cc_changed(cc_if);
+}
+
+uint32_t dwc_cc_match_chid(dwc_cc_if_t *cc_if, uint8_t *chid)
+{
+       uint32_t uid = 0;
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       uid = cc_match_chid(cc_if, chid);
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+       return uid;
+}
+uint32_t dwc_cc_match_cdid(dwc_cc_if_t *cc_if, uint8_t *cdid)
+{
+       uint32_t uid = 0;
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       uid = cc_match_cdid(cc_if, cdid);
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+       return uid;
+}
+
+uint8_t *dwc_cc_ck(dwc_cc_if_t *cc_if, int32_t id)
+{
+       uint8_t *ck = NULL;
+       dwc_cc_t *cc;
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       cc = cc_find(cc_if, id);
+       if (cc) {
+               ck = cc->ck;
+       }
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+
+       return ck;
+
+}
+
+uint8_t *dwc_cc_chid(dwc_cc_if_t *cc_if, int32_t id)
+{
+       uint8_t *retval = NULL;
+       dwc_cc_t *cc;
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       cc = cc_find(cc_if, id);
+       if (cc) {
+               retval = cc->chid;
+       }
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+
+       return retval;
+}
+
+uint8_t *dwc_cc_cdid(dwc_cc_if_t *cc_if, int32_t id)
+{
+       uint8_t *retval = NULL;
+       dwc_cc_t *cc;
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       cc = cc_find(cc_if, id);
+       if (cc) {
+               retval = cc->cdid;
+       }
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+
+       return retval;
+}
+
+uint8_t *dwc_cc_name(dwc_cc_if_t *cc_if, int32_t id, uint8_t *length)
+{
+       uint8_t *retval = NULL;
+       dwc_cc_t *cc;
+
+       DWC_MUTEX_LOCK(cc_if->mutex);
+       *length = 0;
+       cc = cc_find(cc_if, id);
+       if (cc) {
+               *length = cc->length;
+               retval = cc->name;
+       }
+       DWC_MUTEX_UNLOCK(cc_if->mutex);
+
+       return retval;
+}
+
+#endif /* DWC_CCLIB */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_cc.h
@@ -0,0 +1,224 @@
+/* =========================================================================
+ * $File: //dwh/usb_iip/dev/software/dwc_common_port_2/dwc_cc.h $
+ * $Revision: #4 $
+ * $Date: 2010/09/28 $
+ * $Change: 1596182 $
+ *
+ * Synopsys Portability Library Software and documentation
+ * (hereinafter, "Software") is an Unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing
+ * between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for
+ * Licensed Product with Synopsys or any supplement thereto. You are
+ * permitted to use and redistribute this Software in source and binary
+ * forms, with or without modification, provided that redistributions
+ * of source code must retain this notice. You may not view, use,
+ * disclose, copy or distribute this file or any information contained
+ * herein except pursuant to this license grant from Synopsys. If you
+ * do not agree with this notice, including the disclaimer below, then
+ * you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL
+ * SYNOPSYS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================= */
+#ifndef _DWC_CC_H_
+#define _DWC_CC_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @file
+ *
+ * This file defines the Context Context library.
+ *
+ * The main data structure is dwc_cc_if_t which is returned by either the
+ * dwc_cc_if_alloc function or returned by the module to the user via a provided
+ * function. The data structure is opaque and should only be manipulated via the
+ * functions provied in this API.
+ *
+ * It manages a list of connection contexts and operations can be performed to
+ * add, remove, query, search, and change, those contexts.  Additionally,
+ * a dwc_notifier_t object can be requested from the manager so that
+ * the user can be notified whenever the context list has changed.
+ */
+
+#include "dwc_os.h"
+#include "dwc_list.h"
+#include "dwc_notifier.h"
+
+
+/* Notifications */
+#define DWC_CC_LIST_CHANGED_NOTIFICATION "DWC_CC_LIST_CHANGED_NOTIFICATION"
+
+struct dwc_cc_if;
+typedef struct dwc_cc_if dwc_cc_if_t;
+
+
+/** @name Connection Context Operations */
+/** @{ */
+
+/** This function allocates memory for a dwc_cc_if_t structure, initializes
+ * fields to default values, and returns a pointer to the structure or NULL on
+ * error. */
+extern dwc_cc_if_t *dwc_cc_if_alloc(void *mem_ctx, void *mtx_ctx,
+                                   dwc_notifier_t *notifier, unsigned is_host);
+
+/** Frees the memory for the specified CC structure allocated from
+ * dwc_cc_if_alloc(). */
+extern void dwc_cc_if_free(void *mem_ctx, void *mtx_ctx, dwc_cc_if_t *cc_if);
+
+/** Removes all contexts from the connection context list */
+extern void dwc_cc_clear(void *mem_ctx, dwc_cc_if_t *cc_if);
+
+/** Adds a connection context (CHID, CK, CDID, Name) to the connection context list.
+ * If a CHID already exists, the CK and name are overwritten.  Statistics are
+ * not overwritten.
+ *
+ * @param cc_if The cc_if structure.
+ * @param chid A pointer to the 16-byte CHID.  This value will be copied.
+ * @param ck A pointer to the 16-byte CK.  This value will be copied.
+ * @param cdid A pointer to the 16-byte CDID.  This value will be copied.
+ * @param name An optional host friendly name as defined in the association model
+ * spec.  Must be a UTF16-LE unicode string.  Can be NULL to indicated no name.
+ * @param length The length othe unicode string.
+ * @return A unique identifier used to refer to this context that is valid for
+ * as long as this context is still in the list. */
+extern int32_t dwc_cc_add(void *mem_ctx, dwc_cc_if_t *cc_if, uint8_t *chid,
+                         uint8_t *cdid, uint8_t *ck, uint8_t *name,
+                         uint8_t length);
+
+/** Changes the CHID, CK, CDID, or Name values of a connection context in the
+ * list, preserving any accumulated statistics.  This would typically be called
+ * if the host decideds to change the context with a SET_CONNECTION request.
+ *
+ * @param cc_if The cc_if structure.
+ * @param id The identifier of the connection context.
+ * @param chid A pointer to the 16-byte CHID.  This value will be copied.  NULL
+ * indicates no change.
+ * @param cdid A pointer to the 16-byte CDID.  This value will be copied.  NULL
+ * indicates no change.
+ * @param ck A pointer to the 16-byte CK.  This value will be copied.  NULL
+ * indicates no change.
+ * @param name Host friendly name UTF16-LE.  NULL indicates no change.
+ * @param length Length of name. */
+extern void dwc_cc_change(void *mem_ctx, dwc_cc_if_t *cc_if, int32_t id,
+                         uint8_t *chid, uint8_t *cdid, uint8_t *ck,
+                         uint8_t *name, uint8_t length);
+
+/** Remove the specified connection context.
+ * @param cc_if The cc_if structure.
+ * @param id The identifier of the connection context to remove. */
+extern void dwc_cc_remove(void *mem_ctx, dwc_cc_if_t *cc_if, int32_t id);
+
+/** Get a binary block of data for the connection context list and attributes.
+ * This data can be used by the OS specific driver to save the connection
+ * context list into non-volatile memory.
+ *
+ * @param cc_if The cc_if structure.
+ * @param length Return the length of the data buffer.
+ * @return A pointer to the data buffer.  The memory for this buffer should be
+ * freed with DWC_FREE() after use. */
+extern uint8_t *dwc_cc_data_for_save(void *mem_ctx, dwc_cc_if_t *cc_if,
+                                    unsigned int *length);
+
+/** Restore the connection context list from the binary data that was previously
+ * returned from a call to dwc_cc_data_for_save.  This can be used by the OS specific
+ * driver to load a connection context list from non-volatile memory.
+ *
+ * @param cc_if The cc_if structure.
+ * @param data The data bytes as returned from dwc_cc_data_for_save.
+ * @param length The length of the data. */
+extern void dwc_cc_restore_from_data(void *mem_ctx, dwc_cc_if_t *cc_if,
+                                    uint8_t *data, unsigned int length);
+
+/** Find the connection context from the specified CHID.
+ *
+ * @param cc_if The cc_if structure.
+ * @param chid A pointer to the CHID data.
+ * @return A non-zero identifier of the connection context if the CHID matches.
+ * Otherwise returns 0. */
+extern uint32_t dwc_cc_match_chid(dwc_cc_if_t *cc_if, uint8_t *chid);
+
+/** Find the connection context from the specified CDID.
+ *
+ * @param cc_if The cc_if structure.
+ * @param cdid A pointer to the CDID data.
+ * @return A non-zero identifier of the connection context if the CHID matches.
+ * Otherwise returns 0. */
+extern uint32_t dwc_cc_match_cdid(dwc_cc_if_t *cc_if, uint8_t *cdid);
+
+/** Retrieve the CK from the specified connection context.
+ *
+ * @param cc_if The cc_if structure.
+ * @param id The identifier of the connection context.
+ * @return A pointer to the CK data.  The memory does not need to be freed. */
+extern uint8_t *dwc_cc_ck(dwc_cc_if_t *cc_if, int32_t id);
+
+/** Retrieve the CHID from the specified connection context.
+ *
+ * @param cc_if The cc_if structure.
+ * @param id The identifier of the connection context.
+ * @return A pointer to the CHID data.  The memory does not need to be freed. */
+extern uint8_t *dwc_cc_chid(dwc_cc_if_t *cc_if, int32_t id);
+
+/** Retrieve the CDID from the specified connection context.
+ *
+ * @param cc_if The cc_if structure.
+ * @param id The identifier of the connection context.
+ * @return A pointer to the CDID data.  The memory does not need to be freed. */
+extern uint8_t *dwc_cc_cdid(dwc_cc_if_t *cc_if, int32_t id);
+
+extern uint8_t *dwc_cc_name(dwc_cc_if_t *cc_if, int32_t id, uint8_t *length);
+
+/** Checks a buffer for non-zero.
+ * @param id A pointer to a 16 byte buffer.
+ * @return true if the 16 byte value is non-zero. */
+static inline unsigned dwc_assoc_is_not_zero_id(uint8_t *id) {
+       int i;
+       for (i=0; i<16; i++) {
+               if (id[i]) return 1;
+       }
+       return 0;
+}
+
+/** Checks a buffer for zero.
+ * @param id A pointer to a 16 byte buffer.
+ * @return true if the 16 byte value is zero. */
+static inline unsigned dwc_assoc_is_zero_id(uint8_t *id) {
+       return !dwc_assoc_is_not_zero_id(id);
+}
+
+/** Prints an ASCII representation for the 16-byte chid, cdid, or ck, into
+ * buffer. */
+static inline int dwc_print_id_string(char *buffer, uint8_t *id) {
+       char *ptr = buffer;
+       int i;
+       for (i=0; i<16; i++) {
+               ptr += DWC_SPRINTF(ptr, "%02x", id[i]);
+               if (i < 15) {
+                       ptr += DWC_SPRINTF(ptr, " ");
+               }
+       }
+       return ptr - buffer;
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _DWC_CC_H_ */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_common_fbsd.c
@@ -0,0 +1,1308 @@
+#include "dwc_os.h"
+#include "dwc_list.h"
+
+#ifdef DWC_CCLIB
+# include "dwc_cc.h"
+#endif
+
+#ifdef DWC_CRYPTOLIB
+# include "dwc_modpow.h"
+# include "dwc_dh.h"
+# include "dwc_crypto.h"
+#endif
+
+#ifdef DWC_NOTIFYLIB
+# include "dwc_notifier.h"
+#endif
+
+/* OS-Level Implementations */
+
+/* This is the FreeBSD 7.0 kernel implementation of the DWC platform library. */
+
+
+/* MISC */
+
+void *DWC_MEMSET(void *dest, uint8_t byte, uint32_t size)
+{
+       return memset(dest, byte, size);
+}
+
+void *DWC_MEMCPY(void *dest, void const *src, uint32_t size)
+{
+       return memcpy(dest, src, size);
+}
+
+void *DWC_MEMMOVE(void *dest, void *src, uint32_t size)
+{
+       bcopy(src, dest, size);
+       return dest;
+}
+
+int DWC_MEMCMP(void *m1, void *m2, uint32_t size)
+{
+       return memcmp(m1, m2, size);
+}
+
+int DWC_STRNCMP(void *s1, void *s2, uint32_t size)
+{
+       return strncmp(s1, s2, size);
+}
+
+int DWC_STRCMP(void *s1, void *s2)
+{
+       return strcmp(s1, s2);
+}
+
+int DWC_STRLEN(char const *str)
+{
+       return strlen(str);
+}
+
+char *DWC_STRCPY(char *to, char const *from)
+{
+       return strcpy(to, from);
+}
+
+char *DWC_STRDUP(char const *str)
+{
+       int len = DWC_STRLEN(str) + 1;
+       char *new = DWC_ALLOC_ATOMIC(len);
+
+       if (!new) {
+               return NULL;
+       }
+
+       DWC_MEMCPY(new, str, len);
+       return new;
+}
+
+int DWC_ATOI(char *str, int32_t *value)
+{
+       char *end = NULL;
+
+       *value = strtol(str, &end, 0);
+       if (*end == '\0') {
+               return 0;
+       }
+
+       return -1;
+}
+
+int DWC_ATOUI(char *str, uint32_t *value)
+{
+       char *end = NULL;
+
+       *value = strtoul(str, &end, 0);
+       if (*end == '\0') {
+               return 0;
+       }
+
+       return -1;
+}
+
+
+#ifdef DWC_UTFLIB
+/* From usbstring.c */
+
+int DWC_UTF8_TO_UTF16LE(uint8_t const *s, uint16_t *cp, unsigned len)
+{
+       int     count = 0;
+       u8      c;
+       u16     uchar;
+
+       /* this insists on correct encodings, though not minimal ones.
+        * BUT it currently rejects legit 4-byte UTF-8 code points,
+        * which need surrogate pairs.  (Unicode 3.1 can use them.)
+        */
+       while (len != 0 && (c = (u8) *s++) != 0) {
+               if (unlikely(c & 0x80)) {
+                       // 2-byte sequence:
+                       // 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
+                       if ((c & 0xe0) == 0xc0) {
+                               uchar = (c & 0x1f) << 6;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c;
+
+                       // 3-byte sequence (most CJKV characters):
+                       // zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
+                       } else if ((c & 0xf0) == 0xe0) {
+                               uchar = (c & 0x0f) << 12;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c << 6;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c;
+
+                               /* no bogus surrogates */
+                               if (0xd800 <= uchar && uchar <= 0xdfff)
+                                       goto fail;
+
+                       // 4-byte sequence (surrogate pairs, currently rare):
+                       // 11101110wwwwzzzzyy + 110111yyyyxxxxxx
+                       //     = 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx
+                       // (uuuuu = wwww + 1)
+                       // FIXME accept the surrogate code points (only)
+                       } else
+                               goto fail;
+               } else
+                       uchar = c;
+               put_unaligned (cpu_to_le16 (uchar), cp++);
+               count++;
+               len--;
+       }
+       return count;
+fail:
+       return -1;
+}
+
+#endif /* DWC_UTFLIB */
+
+
+/* dwc_debug.h */
+
+dwc_bool_t DWC_IN_IRQ(void)
+{
+//     return in_irq();
+       return 0;
+}
+
+dwc_bool_t DWC_IN_BH(void)
+{
+//     return in_softirq();
+       return 0;
+}
+
+void DWC_VPRINTF(char *format, va_list args)
+{
+       vprintf(format, args);
+}
+
+int DWC_VSNPRINTF(char *str, int size, char *format, va_list args)
+{
+       return vsnprintf(str, size, format, args);
+}
+
+void DWC_PRINTF(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+
+int DWC_SPRINTF(char *buffer, char *format, ...)
+{
+       int retval;
+       va_list args;
+
+       va_start(args, format);
+       retval = vsprintf(buffer, format, args);
+       va_end(args);
+       return retval;
+}
+
+int DWC_SNPRINTF(char *buffer, int size, char *format, ...)
+{
+       int retval;
+       va_list args;
+
+       va_start(args, format);
+       retval = vsnprintf(buffer, size, format, args);
+       va_end(args);
+       return retval;
+}
+
+void __DWC_WARN(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+
+void __DWC_ERROR(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+
+void DWC_EXCEPTION(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+//     BUG_ON(1);      ???
+}
+
+#ifdef DEBUG
+void __DWC_DEBUG(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+#endif
+
+
+/* dwc_mem.h */
+
+#if 0
+dwc_pool_t *DWC_DMA_POOL_CREATE(uint32_t size,
+                               uint32_t align,
+                               uint32_t alloc)
+{
+       struct dma_pool *pool = dma_pool_create("Pool", NULL,
+                                               size, align, alloc);
+       return (dwc_pool_t *)pool;
+}
+
+void DWC_DMA_POOL_DESTROY(dwc_pool_t *pool)
+{
+       dma_pool_destroy((struct dma_pool *)pool);
+}
+
+void *DWC_DMA_POOL_ALLOC(dwc_pool_t *pool, uint64_t *dma_addr)
+{
+//     return dma_pool_alloc((struct dma_pool *)pool, GFP_KERNEL, dma_addr);
+       return dma_pool_alloc((struct dma_pool *)pool, M_WAITOK, dma_addr);
+}
+
+void *DWC_DMA_POOL_ZALLOC(dwc_pool_t *pool, uint64_t *dma_addr)
+{
+       void *vaddr = DWC_DMA_POOL_ALLOC(pool, dma_addr);
+       memset(..);
+}
+
+void DWC_DMA_POOL_FREE(dwc_pool_t *pool, void *vaddr, void *daddr)
+{
+       dma_pool_free(pool, vaddr, daddr);
+}
+#endif
+
+static void dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
+{
+       if (error)
+               return;
+       *(bus_addr_t *)arg = segs[0].ds_addr;
+}
+
+void *__DWC_DMA_ALLOC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr)
+{
+       dwc_dmactx_t *dma = (dwc_dmactx_t *)dma_ctx;
+       int error;
+
+       error = bus_dma_tag_create(
+#if __FreeBSD_version >= 700000
+                       bus_get_dma_tag(dma->dev),      /* parent */
+#else
+                       NULL,                           /* parent */
+#endif
+                       4, 0,                           /* alignment, bounds */
+                       BUS_SPACE_MAXADDR_32BIT,        /* lowaddr */
+                       BUS_SPACE_MAXADDR,              /* highaddr */
+                       NULL, NULL,                     /* filter, filterarg */
+                       size,                           /* maxsize */
+                       1,                              /* nsegments */
+                       size,                           /* maxsegsize */
+                       0,                              /* flags */
+                       NULL,                           /* lockfunc */
+                       NULL,                           /* lockarg */
+                       &dma->dma_tag);
+       if (error) {
+               device_printf(dma->dev, "%s: bus_dma_tag_create failed: %d\n",
+                             __func__, error);
+               goto fail_0;
+       }
+
+       error = bus_dmamem_alloc(dma->dma_tag, &dma->dma_vaddr,
+                                BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &dma->dma_map);
+       if (error) {
+               device_printf(dma->dev, "%s: bus_dmamem_alloc(%ju) failed: %d\n",
+                             __func__, (uintmax_t)size, error);
+               goto fail_1;
+       }
+
+       dma->dma_paddr = 0;
+       error = bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->dma_vaddr, size,
+                               dmamap_cb, &dma->dma_paddr, BUS_DMA_NOWAIT);
+       if (error || dma->dma_paddr == 0) {
+               device_printf(dma->dev, "%s: bus_dmamap_load failed: %d\n",
+                             __func__, error);
+               goto fail_2;
+       }
+
+       *dma_addr = dma->dma_paddr;
+       return dma->dma_vaddr;
+
+fail_2:
+       bus_dmamap_unload(dma->dma_tag, dma->dma_map);
+fail_1:
+       bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
+       bus_dma_tag_destroy(dma->dma_tag);
+fail_0:
+       dma->dma_map = NULL;
+       dma->dma_tag = NULL;
+
+       return NULL;
+}
+
+void __DWC_DMA_FREE(void *dma_ctx, uint32_t size, void *virt_addr, dwc_dma_t dma_addr)
+{
+       dwc_dmactx_t *dma = (dwc_dmactx_t *)dma_ctx;
+
+       if (dma->dma_tag == NULL)
+               return;
+       if (dma->dma_map != NULL) {
+               bus_dmamap_sync(dma->dma_tag, dma->dma_map,
+                               BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+               bus_dmamap_unload(dma->dma_tag, dma->dma_map);
+               bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
+               dma->dma_map = NULL;
+       }
+
+       bus_dma_tag_destroy(dma->dma_tag);
+       dma->dma_tag = NULL;
+}
+
+void *__DWC_ALLOC(void *mem_ctx, uint32_t size)
+{
+       return malloc(size, M_DEVBUF, M_WAITOK | M_ZERO);
+}
+
+void *__DWC_ALLOC_ATOMIC(void *mem_ctx, uint32_t size)
+{
+       return malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
+}
+
+void __DWC_FREE(void *mem_ctx, void *addr)
+{
+       free(addr, M_DEVBUF);
+}
+
+
+#ifdef DWC_CRYPTOLIB
+/* dwc_crypto.h */
+
+void DWC_RANDOM_BYTES(uint8_t *buffer, uint32_t length)
+{
+       get_random_bytes(buffer, length);
+}
+
+int DWC_AES_CBC(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t iv[16], uint8_t *out)
+{
+       struct crypto_blkcipher *tfm;
+       struct blkcipher_desc desc;
+       struct scatterlist sgd;
+       struct scatterlist sgs;
+
+       tfm = crypto_alloc_blkcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC);
+       if (tfm == NULL) {
+               printk("failed to load transform for aes CBC\n");
+               return -1;
+       }
+
+       crypto_blkcipher_setkey(tfm, key, keylen);
+       crypto_blkcipher_set_iv(tfm, iv, 16);
+
+       sg_init_one(&sgd, out, messagelen);
+       sg_init_one(&sgs, message, messagelen);
+
+       desc.tfm = tfm;
+       desc.flags = 0;
+
+       if (crypto_blkcipher_encrypt(&desc, &sgd, &sgs, messagelen)) {
+               crypto_free_blkcipher(tfm);
+               DWC_ERROR("AES CBC encryption failed");
+               return -1;
+       }
+
+       crypto_free_blkcipher(tfm);
+       return 0;
+}
+
+int DWC_SHA256(uint8_t *message, uint32_t len, uint8_t *out)
+{
+       struct crypto_hash *tfm;
+       struct hash_desc desc;
+       struct scatterlist sg;
+
+       tfm = crypto_alloc_hash("sha256", 0, CRYPTO_ALG_ASYNC);
+       if (IS_ERR(tfm)) {
+               DWC_ERROR("Failed to load transform for sha256: %ld", PTR_ERR(tfm));
+               return 0;
+       }
+       desc.tfm = tfm;
+       desc.flags = 0;
+
+       sg_init_one(&sg, message, len);
+       crypto_hash_digest(&desc, &sg, len, out);
+       crypto_free_hash(tfm);
+
+       return 1;
+}
+
+int DWC_HMAC_SHA256(uint8_t *message, uint32_t messagelen,
+                   uint8_t *key, uint32_t keylen, uint8_t *out)
+{
+       struct crypto_hash *tfm;
+       struct hash_desc desc;
+       struct scatterlist sg;
+
+       tfm = crypto_alloc_hash("hmac(sha256)", 0, CRYPTO_ALG_ASYNC);
+       if (IS_ERR(tfm)) {
+               DWC_ERROR("Failed to load transform for hmac(sha256): %ld", PTR_ERR(tfm));
+               return 0;
+       }
+       desc.tfm = tfm;
+       desc.flags = 0;
+
+       sg_init_one(&sg, message, messagelen);
+       crypto_hash_setkey(tfm, key, keylen);
+       crypto_hash_digest(&desc, &sg, messagelen, out);
+       crypto_free_hash(tfm);
+
+       return 1;
+}
+
+#endif /* DWC_CRYPTOLIB */
+
+
+/* Byte Ordering Conversions */
+
+uint32_t DWC_CPU_TO_LE32(uint32_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint32_t DWC_CPU_TO_BE32(uint32_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint32_t DWC_LE32_TO_CPU(uint32_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint32_t DWC_BE32_TO_CPU(uint32_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint16_t DWC_CPU_TO_LE16(uint16_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+uint16_t DWC_CPU_TO_BE16(uint16_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+uint16_t DWC_LE16_TO_CPU(uint16_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+uint16_t DWC_BE16_TO_CPU(uint16_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+
+/* Registers */
+
+uint32_t DWC_READ_REG32(void *io_ctx, uint32_t volatile *reg)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       return bus_space_read_4(io->iot, io->ioh, ior);
+}
+
+#if 0
+uint64_t DWC_READ_REG64(void *io_ctx, uint64_t volatile *reg)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       return bus_space_read_8(io->iot, io->ioh, ior);
+}
+#endif
+
+void DWC_WRITE_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t value)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       bus_space_write_4(io->iot, io->ioh, ior, value);
+}
+
+#if 0
+void DWC_WRITE_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t value)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       bus_space_write_8(io->iot, io->ioh, ior, value);
+}
+#endif
+
+void DWC_MODIFY_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t clear_mask,
+                     uint32_t set_mask)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       bus_space_write_4(io->iot, io->ioh, ior,
+                         (bus_space_read_4(io->iot, io->ioh, ior) &
+                          ~clear_mask) | set_mask);
+}
+
+#if 0
+void DWC_MODIFY_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t clear_mask,
+                     uint64_t set_mask)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       bus_space_write_8(io->iot, io->ioh, ior,
+                         (bus_space_read_8(io->iot, io->ioh, ior) &
+                          ~clear_mask) | set_mask);
+}
+#endif
+
+
+/* Locking */
+
+dwc_spinlock_t *DWC_SPINLOCK_ALLOC(void)
+{
+       struct mtx *sl = DWC_ALLOC(sizeof(*sl));
+
+       if (!sl) {
+               DWC_ERROR("Cannot allocate memory for spinlock");
+               return NULL;
+       }
+
+       mtx_init(sl, "dw3spn", NULL, MTX_SPIN);
+       return (dwc_spinlock_t *)sl;
+}
+
+void DWC_SPINLOCK_FREE(dwc_spinlock_t *lock)
+{
+       struct mtx *sl = (struct mtx *)lock;
+
+       mtx_destroy(sl);
+       DWC_FREE(sl);
+}
+
+void DWC_SPINLOCK(dwc_spinlock_t *lock)
+{
+       mtx_lock_spin((struct mtx *)lock);      // ???
+}
+
+void DWC_SPINUNLOCK(dwc_spinlock_t *lock)
+{
+       mtx_unlock_spin((struct mtx *)lock);    // ???
+}
+
+void DWC_SPINLOCK_IRQSAVE(dwc_spinlock_t *lock, dwc_irqflags_t *flags)
+{
+       mtx_lock_spin((struct mtx *)lock);
+}
+
+void DWC_SPINUNLOCK_IRQRESTORE(dwc_spinlock_t *lock, dwc_irqflags_t flags)
+{
+       mtx_unlock_spin((struct mtx *)lock);
+}
+
+dwc_mutex_t *DWC_MUTEX_ALLOC(void)
+{
+       struct mtx *m;
+       dwc_mutex_t *mutex = (dwc_mutex_t *)DWC_ALLOC(sizeof(struct mtx));
+
+       if (!mutex) {
+               DWC_ERROR("Cannot allocate memory for mutex");
+               return NULL;
+       }
+
+       m = (struct mtx *)mutex;
+       mtx_init(m, "dw3mtx", NULL, MTX_DEF);
+       return mutex;
+}
+
+#if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES))
+#else
+void DWC_MUTEX_FREE(dwc_mutex_t *mutex)
+{
+       mtx_destroy((struct mtx *)mutex);
+       DWC_FREE(mutex);
+}
+#endif
+
+void DWC_MUTEX_LOCK(dwc_mutex_t *mutex)
+{
+       struct mtx *m = (struct mtx *)mutex;
+
+       mtx_lock(m);
+}
+
+int DWC_MUTEX_TRYLOCK(dwc_mutex_t *mutex)
+{
+       struct mtx *m = (struct mtx *)mutex;
+
+       return mtx_trylock(m);
+}
+
+void DWC_MUTEX_UNLOCK(dwc_mutex_t *mutex)
+{
+       struct mtx *m = (struct mtx *)mutex;
+
+       mtx_unlock(m);
+}
+
+
+/* Timing */
+
+void DWC_UDELAY(uint32_t usecs)
+{
+       DELAY(usecs);
+}
+
+void DWC_MDELAY(uint32_t msecs)
+{
+       do {
+               DELAY(1000);
+       } while (--msecs);
+}
+
+void DWC_MSLEEP(uint32_t msecs)
+{
+       struct timeval tv;
+
+       tv.tv_sec = msecs / 1000;
+       tv.tv_usec = (msecs - tv.tv_sec * 1000) * 1000;
+       pause("dw3slp", tvtohz(&tv));
+}
+
+uint32_t DWC_TIME(void)
+{
+       struct timeval tv;
+
+       microuptime(&tv);       // or getmicrouptime? (less precise, but faster)
+       return tv.tv_sec * 1000 + tv.tv_usec / 1000;
+}
+
+
+/* Timers */
+
+struct dwc_timer {
+       struct callout t;
+       char *name;
+       dwc_spinlock_t *lock;
+       dwc_timer_callback_t cb;
+       void *data;
+};
+
+dwc_timer_t *DWC_TIMER_ALLOC(char *name, dwc_timer_callback_t cb, void *data)
+{
+       dwc_timer_t *t = DWC_ALLOC(sizeof(*t));
+
+       if (!t) {
+               DWC_ERROR("Cannot allocate memory for timer");
+               return NULL;
+       }
+
+       callout_init(&t->t, 1);
+
+       t->name = DWC_STRDUP(name);
+       if (!t->name) {
+               DWC_ERROR("Cannot allocate memory for timer->name");
+               goto no_name;
+       }
+
+       t->lock = DWC_SPINLOCK_ALLOC();
+       if (!t->lock) {
+               DWC_ERROR("Cannot allocate memory for lock");
+               goto no_lock;
+       }
+
+       t->cb = cb;
+       t->data = data;
+
+       return t;
+
+ no_lock:
+       DWC_FREE(t->name);
+ no_name:
+       DWC_FREE(t);
+
+       return NULL;
+}
+
+void DWC_TIMER_FREE(dwc_timer_t *timer)
+{
+       callout_stop(&timer->t);
+       DWC_SPINLOCK_FREE(timer->lock);
+       DWC_FREE(timer->name);
+       DWC_FREE(timer);
+}
+
+void DWC_TIMER_SCHEDULE(dwc_timer_t *timer, uint32_t time)
+{
+       struct timeval tv;
+
+       tv.tv_sec = time / 1000;
+       tv.tv_usec = (time - tv.tv_sec * 1000) * 1000;
+       callout_reset(&timer->t, tvtohz(&tv), timer->cb, timer->data);
+}
+
+void DWC_TIMER_CANCEL(dwc_timer_t *timer)
+{
+       callout_stop(&timer->t);
+}
+
+
+/* Wait Queues */
+
+struct dwc_waitq {
+       struct mtx lock;
+       int abort;
+};
+
+dwc_waitq_t *DWC_WAITQ_ALLOC(void)
+{
+       dwc_waitq_t *wq = DWC_ALLOC(sizeof(*wq));
+
+       if (!wq) {
+               DWC_ERROR("Cannot allocate memory for waitqueue");
+               return NULL;
+       }
+
+       mtx_init(&wq->lock, "dw3wtq", NULL, MTX_DEF);
+       wq->abort = 0;
+
+       return wq;
+}
+
+void DWC_WAITQ_FREE(dwc_waitq_t *wq)
+{
+       mtx_destroy(&wq->lock);
+       DWC_FREE(wq);
+}
+
+int32_t DWC_WAITQ_WAIT(dwc_waitq_t *wq, dwc_waitq_condition_t cond, void *data)
+{
+//     intrmask_t ipl;
+       int result = 0;
+
+       mtx_lock(&wq->lock);
+//     ipl = splbio();
+
+       /* Skip the sleep if already aborted or triggered */
+       if (!wq->abort && !cond(data)) {
+//             splx(ipl);
+               result = msleep(wq, &wq->lock, PCATCH, "dw3wat", 0); // infinite timeout
+//             ipl = splbio();
+       }
+
+       if (result == ERESTART) {       // signaled - restart
+               result = -DWC_E_RESTART;
+
+       } else if (result == EINTR) {   // signaled - interrupt
+               result = -DWC_E_ABORT;
+
+       } else if (wq->abort) {
+               result = -DWC_E_ABORT;
+
+       } else {
+               result = 0;
+       }
+
+       wq->abort = 0;
+//     splx(ipl);
+       mtx_unlock(&wq->lock);
+       return result;
+}
+
+int32_t DWC_WAITQ_WAIT_TIMEOUT(dwc_waitq_t *wq, dwc_waitq_condition_t cond,
+                              void *data, int32_t msecs)
+{
+       struct timeval tv, tv1, tv2;
+//     intrmask_t ipl;
+       int result = 0;
+
+       tv.tv_sec = msecs / 1000;
+       tv.tv_usec = (msecs - tv.tv_sec * 1000) * 1000;
+
+       mtx_lock(&wq->lock);
+//     ipl = splbio();
+
+       /* Skip the sleep if already aborted or triggered */
+       if (!wq->abort && !cond(data)) {
+//             splx(ipl);
+               getmicrouptime(&tv1);
+               result = msleep(wq, &wq->lock, PCATCH, "dw3wto", tvtohz(&tv));
+               getmicrouptime(&tv2);
+//             ipl = splbio();
+       }
+
+       if (result == 0) {                      // awoken
+               if (wq->abort) {
+                       result = -DWC_E_ABORT;
+               } else {
+                       tv2.tv_usec -= tv1.tv_usec;
+                       if (tv2.tv_usec < 0) {
+                               tv2.tv_usec += 1000000;
+                               tv2.tv_sec--;
+                       }
+
+                       tv2.tv_sec -= tv1.tv_sec;
+                       result = tv2.tv_sec * 1000 + tv2.tv_usec / 1000;
+                       result = msecs - result;
+                       if (result <= 0)
+                               result = 1;
+               }
+       } else if (result == ERESTART) {        // signaled - restart
+               result = -DWC_E_RESTART;
+
+       } else if (result == EINTR) {           // signaled - interrupt
+               result = -DWC_E_ABORT;
+
+       } else {                                // timed out
+               result = -DWC_E_TIMEOUT;
+       }
+
+       wq->abort = 0;
+//     splx(ipl);
+       mtx_unlock(&wq->lock);
+       return result;
+}
+
+void DWC_WAITQ_TRIGGER(dwc_waitq_t *wq)
+{
+       wakeup(wq);
+}
+
+void DWC_WAITQ_ABORT(dwc_waitq_t *wq)
+{
+//     intrmask_t ipl;
+
+       mtx_lock(&wq->lock);
+//     ipl = splbio();
+       wq->abort = 1;
+       wakeup(wq);
+//     splx(ipl);
+       mtx_unlock(&wq->lock);
+}
+
+
+/* Threading */
+
+struct dwc_thread {
+       struct proc *proc;
+       int abort;
+};
+
+dwc_thread_t *DWC_THREAD_RUN(dwc_thread_function_t func, char *name, void *data)
+{
+       int retval;
+       dwc_thread_t *thread = DWC_ALLOC(sizeof(*thread));
+
+       if (!thread) {
+               return NULL;
+       }
+
+       thread->abort = 0;
+       retval = kthread_create((void (*)(void *))func, data, &thread->proc,
+                               RFPROC | RFNOWAIT, 0, "%s", name);
+       if (retval) {
+               DWC_FREE(thread);
+               return NULL;
+       }
+
+       return thread;
+}
+
+int DWC_THREAD_STOP(dwc_thread_t *thread)
+{
+       int retval;
+
+       thread->abort = 1;
+       retval = tsleep(&thread->abort, 0, "dw3stp", 60 * hz);
+
+       if (retval == 0) {
+               /* DWC_THREAD_EXIT() will free the thread struct */
+               return 0;
+       }
+
+       /* NOTE: We leak the thread struct if thread doesn't die */
+
+       if (retval == EWOULDBLOCK) {
+               return -DWC_E_TIMEOUT;
+       }
+
+       return -DWC_E_UNKNOWN;
+}
+
+dwc_bool_t DWC_THREAD_SHOULD_STOP(dwc_thread_t *thread)
+{
+       return thread->abort;
+}
+
+void DWC_THREAD_EXIT(dwc_thread_t *thread)
+{
+       wakeup(&thread->abort);
+       DWC_FREE(thread);
+       kthread_exit(0);
+}
+
+
+/* tasklets
+ - Runs in interrupt context (cannot sleep)
+ - Each tasklet runs on a single CPU [ How can we ensure this on FreeBSD? Does it matter? ]
+ - Different tasklets can be running simultaneously on different CPUs [ shouldn't matter ]
+ */
+struct dwc_tasklet {
+       struct task t;
+       dwc_tasklet_callback_t cb;
+       void *data;
+};
+
+static void tasklet_callback(void *data, int pending)  // what to do with pending ???
+{
+       dwc_tasklet_t *task = (dwc_tasklet_t *)data;
+
+       task->cb(task->data);
+}
+
+dwc_tasklet_t *DWC_TASK_ALLOC(char *name, dwc_tasklet_callback_t cb, void *data)
+{
+       dwc_tasklet_t *task = DWC_ALLOC(sizeof(*task));
+
+       if (task) {
+               task->cb = cb;
+               task->data = data;
+               TASK_INIT(&task->t, 0, tasklet_callback, task);
+       } else {
+               DWC_ERROR("Cannot allocate memory for tasklet");
+       }
+
+       return task;
+}
+
+void DWC_TASK_FREE(dwc_tasklet_t *task)
+{
+       taskqueue_drain(taskqueue_fast, &task->t);      // ???
+       DWC_FREE(task);
+}
+
+void DWC_TASK_SCHEDULE(dwc_tasklet_t *task)
+{
+       /* Uses predefined system queue */
+       taskqueue_enqueue_fast(taskqueue_fast, &task->t);
+}
+
+
+/* workqueues
+ - Runs in process context (can sleep)
+ */
+typedef struct work_container {
+       dwc_work_callback_t cb;
+       void *data;
+       dwc_workq_t *wq;
+       char *name;
+       int hz;
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_ENTRY(work_container) entry;
+#endif
+       struct task task;
+} work_container_t;
+
+#ifdef DEBUG
+DWC_CIRCLEQ_HEAD(work_container_queue, work_container);
+#endif
+
+struct dwc_workq {
+       struct taskqueue *taskq;
+       dwc_spinlock_t *lock;
+       dwc_waitq_t *waitq;
+       int pending;
+
+#ifdef DEBUG
+       struct work_container_queue entries;
+#endif
+};
+
+static void do_work(void *data, int pending)   // what to do with pending ???
+{
+       work_container_t *container = (work_container_t *)data;
+       dwc_workq_t *wq = container->wq;
+       dwc_irqflags_t flags;
+
+       if (container->hz) {
+               pause("dw3wrk", container->hz);
+       }
+
+       container->cb(container->data);
+       DWC_DEBUG("Work done: %s, container=%p", container->name, container);
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_REMOVE(&wq->entries, container, entry);
+#endif
+       if (container->name)
+               DWC_FREE(container->name);
+       DWC_FREE(container);
+       wq->pending--;
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+       DWC_WAITQ_TRIGGER(wq->waitq);
+}
+
+static int work_done(void *data)
+{
+       dwc_workq_t *workq = (dwc_workq_t *)data;
+
+       return workq->pending == 0;
+}
+
+int DWC_WORKQ_WAIT_WORK_DONE(dwc_workq_t *workq, int timeout)
+{
+       return DWC_WAITQ_WAIT_TIMEOUT(workq->waitq, work_done, workq, timeout);
+}
+
+dwc_workq_t *DWC_WORKQ_ALLOC(char *name)
+{
+       dwc_workq_t *wq = DWC_ALLOC(sizeof(*wq));
+
+       if (!wq) {
+               DWC_ERROR("Cannot allocate memory for workqueue");
+               return NULL;
+       }
+
+       wq->taskq = taskqueue_create(name, M_NOWAIT, taskqueue_thread_enqueue, &wq->taskq);
+       if (!wq->taskq) {
+               DWC_ERROR("Cannot allocate memory for taskqueue");
+               goto no_taskq;
+       }
+
+       wq->pending = 0;
+
+       wq->lock = DWC_SPINLOCK_ALLOC();
+       if (!wq->lock) {
+               DWC_ERROR("Cannot allocate memory for spinlock");
+               goto no_lock;
+       }
+
+       wq->waitq = DWC_WAITQ_ALLOC();
+       if (!wq->waitq) {
+               DWC_ERROR("Cannot allocate memory for waitqueue");
+               goto no_waitq;
+       }
+
+       taskqueue_start_threads(&wq->taskq, 1, PWAIT, "%s taskq", "dw3tsk");
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_INIT(&wq->entries);
+#endif
+       return wq;
+
+ no_waitq:
+       DWC_SPINLOCK_FREE(wq->lock);
+ no_lock:
+       taskqueue_free(wq->taskq);
+ no_taskq:
+       DWC_FREE(wq);
+
+       return NULL;
+}
+
+void DWC_WORKQ_FREE(dwc_workq_t *wq)
+{
+#ifdef DEBUG
+       dwc_irqflags_t flags;
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+
+       if (wq->pending != 0) {
+               struct work_container *container;
+
+               DWC_ERROR("Destroying work queue with pending work");
+
+               DWC_CIRCLEQ_FOREACH(container, &wq->entries, entry) {
+                       DWC_ERROR("Work %s still pending", container->name);
+               }
+       }
+
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+#endif
+       DWC_WAITQ_FREE(wq->waitq);
+       DWC_SPINLOCK_FREE(wq->lock);
+       taskqueue_free(wq->taskq);
+       DWC_FREE(wq);
+}
+
+void DWC_WORKQ_SCHEDULE(dwc_workq_t *wq, dwc_work_callback_t cb, void *data,
+                       char *format, ...)
+{
+       dwc_irqflags_t flags;
+       work_container_t *container;
+       static char name[128];
+       va_list args;
+
+       va_start(args, format);
+       DWC_VSNPRINTF(name, 128, format, args);
+       va_end(args);
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+       wq->pending++;
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+       DWC_WAITQ_TRIGGER(wq->waitq);
+
+       container = DWC_ALLOC_ATOMIC(sizeof(*container));
+       if (!container) {
+               DWC_ERROR("Cannot allocate memory for container");
+               return;
+       }
+
+       container->name = DWC_STRDUP(name);
+       if (!container->name) {
+               DWC_ERROR("Cannot allocate memory for container->name");
+               DWC_FREE(container);
+               return;
+       }
+
+       container->cb = cb;
+       container->data = data;
+       container->wq = wq;
+       container->hz = 0;
+
+       DWC_DEBUG("Queueing work: %s, container=%p", container->name, container);
+
+       TASK_INIT(&container->task, 0, do_work, container);
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_INSERT_TAIL(&wq->entries, container, entry);
+#endif
+       taskqueue_enqueue_fast(wq->taskq, &container->task);
+}
+
+void DWC_WORKQ_SCHEDULE_DELAYED(dwc_workq_t *wq, dwc_work_callback_t cb,
+                               void *data, uint32_t time, char *format, ...)
+{
+       dwc_irqflags_t flags;
+       work_container_t *container;
+       static char name[128];
+       struct timeval tv;
+       va_list args;
+
+       va_start(args, format);
+       DWC_VSNPRINTF(name, 128, format, args);
+       va_end(args);
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+       wq->pending++;
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+       DWC_WAITQ_TRIGGER(wq->waitq);
+
+       container = DWC_ALLOC_ATOMIC(sizeof(*container));
+       if (!container) {
+               DWC_ERROR("Cannot allocate memory for container");
+               return;
+       }
+
+       container->name = DWC_STRDUP(name);
+       if (!container->name) {
+               DWC_ERROR("Cannot allocate memory for container->name");
+               DWC_FREE(container);
+               return;
+       }
+
+       container->cb = cb;
+       container->data = data;
+       container->wq = wq;
+
+       tv.tv_sec = time / 1000;
+       tv.tv_usec = (time - tv.tv_sec * 1000) * 1000;
+       container->hz = tvtohz(&tv);
+
+       DWC_DEBUG("Queueing work: %s, container=%p", container->name, container);
+
+       TASK_INIT(&container->task, 0, do_work, container);
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_INSERT_TAIL(&wq->entries, container, entry);
+#endif
+       taskqueue_enqueue_fast(wq->taskq, &container->task);
+}
+
+int DWC_WORKQ_PENDING(dwc_workq_t *wq)
+{
+       return wq->pending;
+}
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_common_linux.c
@@ -0,0 +1,1409 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kthread.h>
+
+#ifdef DWC_CCLIB
+# include "dwc_cc.h"
+#endif
+
+#ifdef DWC_CRYPTOLIB
+# include "dwc_modpow.h"
+# include "dwc_dh.h"
+# include "dwc_crypto.h"
+#endif
+
+#ifdef DWC_NOTIFYLIB
+# include "dwc_notifier.h"
+#endif
+
+/* OS-Level Implementations */
+
+/* This is the Linux kernel implementation of the DWC platform library. */
+#include <linux/moduleparam.h>
+#include <linux/ctype.h>
+#include <linux/crypto.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/cdev.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/jiffies.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/random.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/usb.h>
+
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
+# include <linux/usb/gadget.h>
+#else
+# include <linux/usb_gadget.h>
+#endif
+
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+
+#include "dwc_os.h"
+#include "dwc_list.h"
+
+
+/* MISC */
+
+void *DWC_MEMSET(void *dest, uint8_t byte, uint32_t size)
+{
+       return memset(dest, byte, size);
+}
+
+void *DWC_MEMCPY(void *dest, void const *src, uint32_t size)
+{
+       return memcpy(dest, src, size);
+}
+
+void *DWC_MEMMOVE(void *dest, void *src, uint32_t size)
+{
+       return memmove(dest, src, size);
+}
+
+int DWC_MEMCMP(void *m1, void *m2, uint32_t size)
+{
+       return memcmp(m1, m2, size);
+}
+
+int DWC_STRNCMP(void *s1, void *s2, uint32_t size)
+{
+       return strncmp(s1, s2, size);
+}
+
+int DWC_STRCMP(void *s1, void *s2)
+{
+       return strcmp(s1, s2);
+}
+
+int DWC_STRLEN(char const *str)
+{
+       return strlen(str);
+}
+
+char *DWC_STRCPY(char *to, char const *from)
+{
+       return strcpy(to, from);
+}
+
+char *DWC_STRDUP(char const *str)
+{
+       int len = DWC_STRLEN(str) + 1;
+       char *new = DWC_ALLOC_ATOMIC(len);
+
+       if (!new) {
+               return NULL;
+       }
+
+       DWC_MEMCPY(new, str, len);
+       return new;
+}
+
+int DWC_ATOI(const char *str, int32_t *value)
+{
+       char *end = NULL;
+
+       *value = simple_strtol(str, &end, 0);
+       if (*end == '\0') {
+               return 0;
+       }
+
+       return -1;
+}
+
+int DWC_ATOUI(const char *str, uint32_t *value)
+{
+       char *end = NULL;
+
+       *value = simple_strtoul(str, &end, 0);
+       if (*end == '\0') {
+               return 0;
+       }
+
+       return -1;
+}
+
+
+#ifdef DWC_UTFLIB
+/* From usbstring.c */
+
+int DWC_UTF8_TO_UTF16LE(uint8_t const *s, uint16_t *cp, unsigned len)
+{
+       int     count = 0;
+       u8      c;
+       u16     uchar;
+
+       /* this insists on correct encodings, though not minimal ones.
+        * BUT it currently rejects legit 4-byte UTF-8 code points,
+        * which need surrogate pairs.  (Unicode 3.1 can use them.)
+        */
+       while (len != 0 && (c = (u8) *s++) != 0) {
+               if (unlikely(c & 0x80)) {
+                       // 2-byte sequence:
+                       // 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
+                       if ((c & 0xe0) == 0xc0) {
+                               uchar = (c & 0x1f) << 6;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c;
+
+                       // 3-byte sequence (most CJKV characters):
+                       // zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
+                       } else if ((c & 0xf0) == 0xe0) {
+                               uchar = (c & 0x0f) << 12;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c << 6;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c;
+
+                               /* no bogus surrogates */
+                               if (0xd800 <= uchar && uchar <= 0xdfff)
+                                       goto fail;
+
+                       // 4-byte sequence (surrogate pairs, currently rare):
+                       // 11101110wwwwzzzzyy + 110111yyyyxxxxxx
+                       //     = 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx
+                       // (uuuuu = wwww + 1)
+                       // FIXME accept the surrogate code points (only)
+                       } else
+                               goto fail;
+               } else
+                       uchar = c;
+               put_unaligned (cpu_to_le16 (uchar), cp++);
+               count++;
+               len--;
+       }
+       return count;
+fail:
+       return -1;
+}
+#endif /* DWC_UTFLIB */
+
+
+/* dwc_debug.h */
+
+dwc_bool_t DWC_IN_IRQ(void)
+{
+       return in_irq();
+}
+
+dwc_bool_t DWC_IN_BH(void)
+{
+       return in_softirq();
+}
+
+void DWC_VPRINTF(char *format, va_list args)
+{
+       vprintk(format, args);
+}
+
+int DWC_VSNPRINTF(char *str, int size, char *format, va_list args)
+{
+       return vsnprintf(str, size, format, args);
+}
+
+void DWC_PRINTF(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+
+int DWC_SPRINTF(char *buffer, char *format, ...)
+{
+       int retval;
+       va_list args;
+
+       va_start(args, format);
+       retval = vsprintf(buffer, format, args);
+       va_end(args);
+       return retval;
+}
+
+int DWC_SNPRINTF(char *buffer, int size, char *format, ...)
+{
+       int retval;
+       va_list args;
+
+       va_start(args, format);
+       retval = vsnprintf(buffer, size, format, args);
+       va_end(args);
+       return retval;
+}
+
+void __DWC_WARN(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_PRINTF(KERN_WARNING);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+
+void __DWC_ERROR(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_PRINTF(KERN_ERR);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+
+void DWC_EXCEPTION(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_PRINTF(KERN_ERR);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+       BUG_ON(1);
+}
+
+#ifdef DEBUG
+void __DWC_DEBUG(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_PRINTF(KERN_DEBUG);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+#endif
+
+
+/* dwc_mem.h */
+
+#if 0
+dwc_pool_t *DWC_DMA_POOL_CREATE(uint32_t size,
+                               uint32_t align,
+                               uint32_t alloc)
+{
+       struct dma_pool *pool = dma_pool_create("Pool", NULL,
+                                               size, align, alloc);
+       return (dwc_pool_t *)pool;
+}
+
+void DWC_DMA_POOL_DESTROY(dwc_pool_t *pool)
+{
+       dma_pool_destroy((struct dma_pool *)pool);
+}
+
+void *DWC_DMA_POOL_ALLOC(dwc_pool_t *pool, uint64_t *dma_addr)
+{
+       return dma_pool_alloc((struct dma_pool *)pool, GFP_KERNEL, dma_addr);
+}
+
+void *DWC_DMA_POOL_ZALLOC(dwc_pool_t *pool, uint64_t *dma_addr)
+{
+       void *vaddr = DWC_DMA_POOL_ALLOC(pool, dma_addr);
+       memset(..);
+}
+
+void DWC_DMA_POOL_FREE(dwc_pool_t *pool, void *vaddr, void *daddr)
+{
+       dma_pool_free(pool, vaddr, daddr);
+}
+#endif
+
+void *__DWC_DMA_ALLOC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr)
+{
+       return dma_alloc_coherent(dma_ctx, size, dma_addr, GFP_KERNEL | GFP_DMA32);
+}
+
+void *__DWC_DMA_ALLOC_ATOMIC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr)
+{
+       return dma_alloc_coherent(dma_ctx, size, dma_addr, GFP_ATOMIC);
+}
+
+void __DWC_DMA_FREE(void *dma_ctx, uint32_t size, void *virt_addr, dwc_dma_t dma_addr)
+{
+       dma_free_coherent(dma_ctx, size, virt_addr, dma_addr);
+}
+
+void *__DWC_ALLOC(void *mem_ctx, uint32_t size)
+{
+       return kzalloc(size, GFP_KERNEL);
+}
+
+void *__DWC_ALLOC_ATOMIC(void *mem_ctx, uint32_t size)
+{
+       return kzalloc(size, GFP_ATOMIC);
+}
+
+void __DWC_FREE(void *mem_ctx, void *addr)
+{
+       kfree(addr);
+}
+
+
+#ifdef DWC_CRYPTOLIB
+/* dwc_crypto.h */
+
+void DWC_RANDOM_BYTES(uint8_t *buffer, uint32_t length)
+{
+       get_random_bytes(buffer, length);
+}
+
+int DWC_AES_CBC(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t iv[16], uint8_t *out)
+{
+       struct crypto_blkcipher *tfm;
+       struct blkcipher_desc desc;
+       struct scatterlist sgd;
+       struct scatterlist sgs;
+
+       tfm = crypto_alloc_blkcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC);
+       if (tfm == NULL) {
+               printk("failed to load transform for aes CBC\n");
+               return -1;
+       }
+
+       crypto_blkcipher_setkey(tfm, key, keylen);
+       crypto_blkcipher_set_iv(tfm, iv, 16);
+
+       sg_init_one(&sgd, out, messagelen);
+       sg_init_one(&sgs, message, messagelen);
+
+       desc.tfm = tfm;
+       desc.flags = 0;
+
+       if (crypto_blkcipher_encrypt(&desc, &sgd, &sgs, messagelen)) {
+               crypto_free_blkcipher(tfm);
+               DWC_ERROR("AES CBC encryption failed");
+               return -1;
+       }
+
+       crypto_free_blkcipher(tfm);
+       return 0;
+}
+
+int DWC_SHA256(uint8_t *message, uint32_t len, uint8_t *out)
+{
+       struct crypto_hash *tfm;
+       struct hash_desc desc;
+       struct scatterlist sg;
+
+       tfm = crypto_alloc_hash("sha256", 0, CRYPTO_ALG_ASYNC);
+       if (IS_ERR(tfm)) {
+               DWC_ERROR("Failed to load transform for sha256: %ld\n", PTR_ERR(tfm));
+               return 0;
+       }
+       desc.tfm = tfm;
+       desc.flags = 0;
+
+       sg_init_one(&sg, message, len);
+       crypto_hash_digest(&desc, &sg, len, out);
+       crypto_free_hash(tfm);
+
+       return 1;
+}
+
+int DWC_HMAC_SHA256(uint8_t *message, uint32_t messagelen,
+                   uint8_t *key, uint32_t keylen, uint8_t *out)
+{
+       struct crypto_hash *tfm;
+       struct hash_desc desc;
+       struct scatterlist sg;
+
+       tfm = crypto_alloc_hash("hmac(sha256)", 0, CRYPTO_ALG_ASYNC);
+       if (IS_ERR(tfm)) {
+               DWC_ERROR("Failed to load transform for hmac(sha256): %ld\n", PTR_ERR(tfm));
+               return 0;
+       }
+       desc.tfm = tfm;
+       desc.flags = 0;
+
+       sg_init_one(&sg, message, messagelen);
+       crypto_hash_setkey(tfm, key, keylen);
+       crypto_hash_digest(&desc, &sg, messagelen, out);
+       crypto_free_hash(tfm);
+
+       return 1;
+}
+#endif /* DWC_CRYPTOLIB */
+
+
+/* Byte Ordering Conversions */
+
+uint32_t DWC_CPU_TO_LE32(uint32_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint32_t DWC_CPU_TO_BE32(uint32_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint32_t DWC_LE32_TO_CPU(uint32_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint32_t DWC_BE32_TO_CPU(uint32_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint16_t DWC_CPU_TO_LE16(uint16_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+uint16_t DWC_CPU_TO_BE16(uint16_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+uint16_t DWC_LE16_TO_CPU(uint16_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+uint16_t DWC_BE16_TO_CPU(uint16_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+
+/* Registers */
+
+uint32_t DWC_READ_REG32(uint32_t volatile *reg)
+{
+       return readl(reg);
+}
+
+#if 0
+uint64_t DWC_READ_REG64(uint64_t volatile *reg)
+{
+}
+#endif
+
+void DWC_WRITE_REG32(uint32_t volatile *reg, uint32_t value)
+{
+       writel(value, reg);
+}
+
+#if 0
+void DWC_WRITE_REG64(uint64_t volatile *reg, uint64_t value)
+{
+}
+#endif
+
+void DWC_MODIFY_REG32(uint32_t volatile *reg, uint32_t clear_mask, uint32_t set_mask)
+{
+       writel((readl(reg) & ~clear_mask) | set_mask, reg);
+}
+
+#if 0
+void DWC_MODIFY_REG64(uint64_t volatile *reg, uint64_t clear_mask, uint64_t set_mask)
+{
+}
+#endif
+
+
+/* Locking */
+
+dwc_spinlock_t *DWC_SPINLOCK_ALLOC(void)
+{
+       spinlock_t *sl = (spinlock_t *)1;
+
+#if defined(CONFIG_PREEMPT) || defined(CONFIG_SMP)
+       sl = DWC_ALLOC(sizeof(*sl));
+       if (!sl) {
+               DWC_ERROR("Cannot allocate memory for spinlock\n");
+               return NULL;
+       }
+
+       spin_lock_init(sl);
+#endif
+       return (dwc_spinlock_t *)sl;
+}
+
+void DWC_SPINLOCK_FREE(dwc_spinlock_t *lock)
+{
+#if defined(CONFIG_PREEMPT) || defined(CONFIG_SMP)
+       DWC_FREE(lock);
+#endif
+}
+
+void DWC_SPINLOCK(dwc_spinlock_t *lock)
+{
+#if defined(CONFIG_PREEMPT) || defined(CONFIG_SMP)
+       spin_lock((spinlock_t *)lock);
+#endif
+}
+
+void DWC_SPINUNLOCK(dwc_spinlock_t *lock)
+{
+#if defined(CONFIG_PREEMPT) || defined(CONFIG_SMP)
+       spin_unlock((spinlock_t *)lock);
+#endif
+}
+
+void DWC_SPINLOCK_IRQSAVE(dwc_spinlock_t *lock, dwc_irqflags_t *flags)
+{
+       dwc_irqflags_t f;
+
+#if defined(CONFIG_PREEMPT) || defined(CONFIG_SMP)
+       spin_lock_irqsave((spinlock_t *)lock, f);
+#else
+       local_irq_save(f);
+#endif
+       *flags = f;
+}
+
+void DWC_SPINUNLOCK_IRQRESTORE(dwc_spinlock_t *lock, dwc_irqflags_t flags)
+{
+#if defined(CONFIG_PREEMPT) || defined(CONFIG_SMP)
+       spin_unlock_irqrestore((spinlock_t *)lock, flags);
+#else
+       local_irq_restore(flags);
+#endif
+}
+
+dwc_mutex_t *DWC_MUTEX_ALLOC(void)
+{
+       struct mutex *m;
+       dwc_mutex_t *mutex = (dwc_mutex_t *)DWC_ALLOC(sizeof(struct mutex));
+
+       if (!mutex) {
+               DWC_ERROR("Cannot allocate memory for mutex\n");
+               return NULL;
+       }
+
+       m = (struct mutex *)mutex;
+       mutex_init(m);
+       return mutex;
+}
+
+#if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES))
+#else
+void DWC_MUTEX_FREE(dwc_mutex_t *mutex)
+{
+       mutex_destroy((struct mutex *)mutex);
+       DWC_FREE(mutex);
+}
+#endif
+
+void DWC_MUTEX_LOCK(dwc_mutex_t *mutex)
+{
+       struct mutex *m = (struct mutex *)mutex;
+       mutex_lock(m);
+}
+
+int DWC_MUTEX_TRYLOCK(dwc_mutex_t *mutex)
+{
+       struct mutex *m = (struct mutex *)mutex;
+       return mutex_trylock(m);
+}
+
+void DWC_MUTEX_UNLOCK(dwc_mutex_t *mutex)
+{
+       struct mutex *m = (struct mutex *)mutex;
+       mutex_unlock(m);
+}
+
+
+/* Timing */
+
+void DWC_UDELAY(uint32_t usecs)
+{
+       udelay(usecs);
+}
+
+void DWC_MDELAY(uint32_t msecs)
+{
+       mdelay(msecs);
+}
+
+void DWC_MSLEEP(uint32_t msecs)
+{
+       msleep(msecs);
+}
+
+uint32_t DWC_TIME(void)
+{
+       return jiffies_to_msecs(jiffies);
+}
+
+
+/* Timers */
+
+struct dwc_timer {
+       struct timer_list t;
+       char *name;
+       dwc_timer_callback_t cb;
+       void *data;
+       uint8_t scheduled;
+       dwc_spinlock_t *lock;
+};
+
+static void timer_callback(struct timer_list *tt)
+{
+       dwc_timer_t *timer = from_timer(timer, tt, t);
+       dwc_irqflags_t flags;
+
+       DWC_SPINLOCK_IRQSAVE(timer->lock, &flags);
+       timer->scheduled = 0;
+       DWC_SPINUNLOCK_IRQRESTORE(timer->lock, flags);
+       DWC_DEBUGC("Timer %s callback", timer->name);
+       timer->cb(timer->data);
+}
+
+dwc_timer_t *DWC_TIMER_ALLOC(char *name, dwc_timer_callback_t cb, void *data)
+{
+       dwc_timer_t *t = DWC_ALLOC(sizeof(*t));
+
+       if (!t) {
+               DWC_ERROR("Cannot allocate memory for timer");
+               return NULL;
+       }
+
+       t->name = DWC_STRDUP(name);
+       if (!t->name) {
+               DWC_ERROR("Cannot allocate memory for timer->name");
+               goto no_name;
+       }
+
+#if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_SPINLOCK))
+       DWC_SPINLOCK_ALLOC_LINUX_DEBUG(t->lock);
+#else
+       t->lock = DWC_SPINLOCK_ALLOC();
+#endif
+       if (!t->lock) {
+               DWC_ERROR("Cannot allocate memory for lock");
+               goto no_lock;
+       }
+
+       t->scheduled = 0;
+       t->t.expires = jiffies;
+       timer_setup(&t->t, timer_callback, 0);
+
+       t->cb = cb;
+       t->data = data;
+
+       return t;
+
+ no_lock:
+       DWC_FREE(t->name);
+ no_name:
+       DWC_FREE(t);
+       return NULL;
+}
+
+void DWC_TIMER_FREE(dwc_timer_t *timer)
+{
+       dwc_irqflags_t flags;
+
+       DWC_SPINLOCK_IRQSAVE(timer->lock, &flags);
+
+       if (timer->scheduled) {
+               del_timer(&timer->t);
+               timer->scheduled = 0;
+       }
+
+       DWC_SPINUNLOCK_IRQRESTORE(timer->lock, flags);
+       DWC_SPINLOCK_FREE(timer->lock);
+       DWC_FREE(timer->name);
+       DWC_FREE(timer);
+}
+
+void DWC_TIMER_SCHEDULE(dwc_timer_t *timer, uint32_t time)
+{
+       dwc_irqflags_t flags;
+
+       DWC_SPINLOCK_IRQSAVE(timer->lock, &flags);
+
+       if (!timer->scheduled) {
+               timer->scheduled = 1;
+               DWC_DEBUGC("Scheduling timer %s to expire in +%d msec", timer->name, time);
+               timer->t.expires = jiffies + msecs_to_jiffies(time);
+               add_timer(&timer->t);
+       } else {
+               DWC_DEBUGC("Modifying timer %s to expire in +%d msec", timer->name, time);
+               mod_timer(&timer->t, jiffies + msecs_to_jiffies(time));
+       }
+
+       DWC_SPINUNLOCK_IRQRESTORE(timer->lock, flags);
+}
+
+void DWC_TIMER_CANCEL(dwc_timer_t *timer)
+{
+       del_timer(&timer->t);
+}
+
+
+/* Wait Queues */
+
+struct dwc_waitq {
+       wait_queue_head_t queue;
+       int abort;
+};
+
+dwc_waitq_t *DWC_WAITQ_ALLOC(void)
+{
+       dwc_waitq_t *wq = DWC_ALLOC(sizeof(*wq));
+
+       if (!wq) {
+               DWC_ERROR("Cannot allocate memory for waitqueue\n");
+               return NULL;
+       }
+
+       init_waitqueue_head(&wq->queue);
+       wq->abort = 0;
+       return wq;
+}
+
+void DWC_WAITQ_FREE(dwc_waitq_t *wq)
+{
+       DWC_FREE(wq);
+}
+
+int32_t DWC_WAITQ_WAIT(dwc_waitq_t *wq, dwc_waitq_condition_t cond, void *data)
+{
+       int result = wait_event_interruptible(wq->queue,
+                                             cond(data) || wq->abort);
+       if (result == -ERESTARTSYS) {
+               wq->abort = 0;
+               return -DWC_E_RESTART;
+       }
+
+       if (wq->abort == 1) {
+               wq->abort = 0;
+               return -DWC_E_ABORT;
+       }
+
+       wq->abort = 0;
+
+       if (result == 0) {
+               return 0;
+       }
+
+       return -DWC_E_UNKNOWN;
+}
+
+int32_t DWC_WAITQ_WAIT_TIMEOUT(dwc_waitq_t *wq, dwc_waitq_condition_t cond,
+                              void *data, int32_t msecs)
+{
+       int32_t tmsecs;
+       int result = wait_event_interruptible_timeout(wq->queue,
+                                                     cond(data) || wq->abort,
+                                                     msecs_to_jiffies(msecs));
+       if (result == -ERESTARTSYS) {
+               wq->abort = 0;
+               return -DWC_E_RESTART;
+       }
+
+       if (wq->abort == 1) {
+               wq->abort = 0;
+               return -DWC_E_ABORT;
+       }
+
+       wq->abort = 0;
+
+       if (result > 0) {
+               tmsecs = jiffies_to_msecs(result);
+               if (!tmsecs) {
+                       return 1;
+               }
+
+               return tmsecs;
+       }
+
+       if (result == 0) {
+               return -DWC_E_TIMEOUT;
+       }
+
+       return -DWC_E_UNKNOWN;
+}
+
+void DWC_WAITQ_TRIGGER(dwc_waitq_t *wq)
+{
+       wq->abort = 0;
+       wake_up_interruptible(&wq->queue);
+}
+
+void DWC_WAITQ_ABORT(dwc_waitq_t *wq)
+{
+       wq->abort = 1;
+       wake_up_interruptible(&wq->queue);
+}
+
+
+/* Threading */
+
+dwc_thread_t *DWC_THREAD_RUN(dwc_thread_function_t func, char *name, void *data)
+{
+       struct task_struct *thread = kthread_run(func, data, name);
+
+       if (thread == ERR_PTR(-ENOMEM)) {
+               return NULL;
+       }
+
+       return (dwc_thread_t *)thread;
+}
+
+int DWC_THREAD_STOP(dwc_thread_t *thread)
+{
+       return kthread_stop((struct task_struct *)thread);
+}
+
+dwc_bool_t DWC_THREAD_SHOULD_STOP(void)
+{
+       return kthread_should_stop();
+}
+
+
+/* tasklets
+ - run in interrupt context (cannot sleep)
+ - each tasklet runs on a single CPU
+ - different tasklets can be running simultaneously on different CPUs
+ */
+struct dwc_tasklet {
+       struct tasklet_struct t;
+       dwc_tasklet_callback_t cb;
+       void *data;
+};
+
+static void tasklet_callback(unsigned long data)
+{
+       dwc_tasklet_t *t = (dwc_tasklet_t *)data;
+       t->cb(t->data);
+}
+
+dwc_tasklet_t *DWC_TASK_ALLOC(char *name, dwc_tasklet_callback_t cb, void *data)
+{
+       dwc_tasklet_t *t = DWC_ALLOC(sizeof(*t));
+
+       if (t) {
+               t->cb = cb;
+               t->data = data;
+               tasklet_init(&t->t, tasklet_callback, (unsigned long)t);
+       } else {
+               DWC_ERROR("Cannot allocate memory for tasklet\n");
+       }
+
+       return t;
+}
+
+void DWC_TASK_FREE(dwc_tasklet_t *task)
+{
+       DWC_FREE(task);
+}
+
+void DWC_TASK_SCHEDULE(dwc_tasklet_t *task)
+{
+       tasklet_schedule(&task->t);
+}
+
+void DWC_TASK_HI_SCHEDULE(dwc_tasklet_t *task)
+{
+       tasklet_hi_schedule(&task->t);
+}
+
+
+/* workqueues
+ - run in process context (can sleep)
+ */
+typedef struct work_container {
+       dwc_work_callback_t cb;
+       void *data;
+       dwc_workq_t *wq;
+       char *name;
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_ENTRY(work_container) entry;
+#endif
+       struct delayed_work work;
+} work_container_t;
+
+#ifdef DEBUG
+DWC_CIRCLEQ_HEAD(work_container_queue, work_container);
+#endif
+
+struct dwc_workq {
+       struct workqueue_struct *wq;
+       dwc_spinlock_t *lock;
+       dwc_waitq_t *waitq;
+       int pending;
+
+#ifdef DEBUG
+       struct work_container_queue entries;
+#endif
+};
+
+static void do_work(struct work_struct *work)
+{
+       dwc_irqflags_t flags;
+       struct delayed_work *dw = container_of(work, struct delayed_work, work);
+       work_container_t *container = container_of(dw, struct work_container, work);
+       dwc_workq_t *wq = container->wq;
+
+       container->cb(container->data);
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_REMOVE(&wq->entries, container, entry);
+#endif
+       DWC_DEBUGC("Work done: %s, container=%p", container->name, container);
+       if (container->name) {
+               DWC_FREE(container->name);
+       }
+       DWC_FREE(container);
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+       wq->pending--;
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+       DWC_WAITQ_TRIGGER(wq->waitq);
+}
+
+static int work_done(void *data)
+{
+       dwc_workq_t *workq = (dwc_workq_t *)data;
+       return workq->pending == 0;
+}
+
+int DWC_WORKQ_WAIT_WORK_DONE(dwc_workq_t *workq, int timeout)
+{
+       return DWC_WAITQ_WAIT_TIMEOUT(workq->waitq, work_done, workq, timeout);
+}
+
+dwc_workq_t *DWC_WORKQ_ALLOC(char *name)
+{
+       dwc_workq_t *wq = DWC_ALLOC(sizeof(*wq));
+
+       if (!wq) {
+               return NULL;
+       }
+
+       wq->wq = create_singlethread_workqueue(name);
+       if (!wq->wq) {
+               goto no_wq;
+       }
+
+       wq->pending = 0;
+
+#if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_SPINLOCK))
+       DWC_SPINLOCK_ALLOC_LINUX_DEBUG(wq->lock);
+#else
+       wq->lock = DWC_SPINLOCK_ALLOC();
+#endif
+       if (!wq->lock) {
+               goto no_lock;
+       }
+
+       wq->waitq = DWC_WAITQ_ALLOC();
+       if (!wq->waitq) {
+               goto no_waitq;
+       }
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_INIT(&wq->entries);
+#endif
+       return wq;
+
+ no_waitq:
+       DWC_SPINLOCK_FREE(wq->lock);
+ no_lock:
+       destroy_workqueue(wq->wq);
+ no_wq:
+       DWC_FREE(wq);
+
+       return NULL;
+}
+
+void DWC_WORKQ_FREE(dwc_workq_t *wq)
+{
+#ifdef DEBUG
+       if (wq->pending != 0) {
+               struct work_container *wc;
+               DWC_ERROR("Destroying work queue with pending work");
+               DWC_CIRCLEQ_FOREACH(wc, &wq->entries, entry) {
+                       DWC_ERROR("Work %s still pending", wc->name);
+               }
+       }
+#endif
+       destroy_workqueue(wq->wq);
+       DWC_SPINLOCK_FREE(wq->lock);
+       DWC_WAITQ_FREE(wq->waitq);
+       DWC_FREE(wq);
+}
+
+void DWC_WORKQ_SCHEDULE(dwc_workq_t *wq, dwc_work_callback_t cb, void *data,
+                       char *format, ...)
+{
+       dwc_irqflags_t flags;
+       work_container_t *container;
+       static char name[128];
+       va_list args;
+
+       va_start(args, format);
+       DWC_VSNPRINTF(name, 128, format, args);
+       va_end(args);
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+       wq->pending++;
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+       DWC_WAITQ_TRIGGER(wq->waitq);
+
+       container = DWC_ALLOC_ATOMIC(sizeof(*container));
+       if (!container) {
+               DWC_ERROR("Cannot allocate memory for container\n");
+               return;
+       }
+
+       container->name = DWC_STRDUP(name);
+       if (!container->name) {
+               DWC_ERROR("Cannot allocate memory for container->name\n");
+               DWC_FREE(container);
+               return;
+       }
+
+       container->cb = cb;
+       container->data = data;
+       container->wq = wq;
+       DWC_DEBUGC("Queueing work: %s, container=%p", container->name, container);
+       INIT_WORK(&container->work.work, do_work);
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_INSERT_TAIL(&wq->entries, container, entry);
+#endif
+       queue_work(wq->wq, &container->work.work);
+}
+
+void DWC_WORKQ_SCHEDULE_DELAYED(dwc_workq_t *wq, dwc_work_callback_t cb,
+                               void *data, uint32_t time, char *format, ...)
+{
+       dwc_irqflags_t flags;
+       work_container_t *container;
+       static char name[128];
+       va_list args;
+
+       va_start(args, format);
+       DWC_VSNPRINTF(name, 128, format, args);
+       va_end(args);
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+       wq->pending++;
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+       DWC_WAITQ_TRIGGER(wq->waitq);
+
+       container = DWC_ALLOC_ATOMIC(sizeof(*container));
+       if (!container) {
+               DWC_ERROR("Cannot allocate memory for container\n");
+               return;
+       }
+
+       container->name = DWC_STRDUP(name);
+       if (!container->name) {
+               DWC_ERROR("Cannot allocate memory for container->name\n");
+               DWC_FREE(container);
+               return;
+       }
+
+       container->cb = cb;
+       container->data = data;
+       container->wq = wq;
+       DWC_DEBUGC("Queueing work: %s, container=%p", container->name, container);
+       INIT_DELAYED_WORK(&container->work, do_work);
+
+#ifdef DEBUG
+       DWC_CIRCLEQ_INSERT_TAIL(&wq->entries, container, entry);
+#endif
+       queue_delayed_work(wq->wq, &container->work, msecs_to_jiffies(time));
+}
+
+int DWC_WORKQ_PENDING(dwc_workq_t *wq)
+{
+       return wq->pending;
+}
+
+
+#ifdef DWC_LIBMODULE
+
+#ifdef DWC_CCLIB
+/* CC */
+EXPORT_SYMBOL(dwc_cc_if_alloc);
+EXPORT_SYMBOL(dwc_cc_if_free);
+EXPORT_SYMBOL(dwc_cc_clear);
+EXPORT_SYMBOL(dwc_cc_add);
+EXPORT_SYMBOL(dwc_cc_remove);
+EXPORT_SYMBOL(dwc_cc_change);
+EXPORT_SYMBOL(dwc_cc_data_for_save);
+EXPORT_SYMBOL(dwc_cc_restore_from_data);
+EXPORT_SYMBOL(dwc_cc_match_chid);
+EXPORT_SYMBOL(dwc_cc_match_cdid);
+EXPORT_SYMBOL(dwc_cc_ck);
+EXPORT_SYMBOL(dwc_cc_chid);
+EXPORT_SYMBOL(dwc_cc_cdid);
+EXPORT_SYMBOL(dwc_cc_name);
+#endif /* DWC_CCLIB */
+
+#ifdef DWC_CRYPTOLIB
+# ifndef CONFIG_MACH_IPMATE
+/* Modpow */
+EXPORT_SYMBOL(dwc_modpow);
+
+/* DH */
+EXPORT_SYMBOL(dwc_dh_modpow);
+EXPORT_SYMBOL(dwc_dh_derive_keys);
+EXPORT_SYMBOL(dwc_dh_pk);
+# endif        /* CONFIG_MACH_IPMATE */
+
+/* Crypto */
+EXPORT_SYMBOL(dwc_wusb_aes_encrypt);
+EXPORT_SYMBOL(dwc_wusb_cmf);
+EXPORT_SYMBOL(dwc_wusb_prf);
+EXPORT_SYMBOL(dwc_wusb_fill_ccm_nonce);
+EXPORT_SYMBOL(dwc_wusb_gen_nonce);
+EXPORT_SYMBOL(dwc_wusb_gen_key);
+EXPORT_SYMBOL(dwc_wusb_gen_mic);
+#endif /* DWC_CRYPTOLIB */
+
+/* Notification */
+#ifdef DWC_NOTIFYLIB
+EXPORT_SYMBOL(dwc_alloc_notification_manager);
+EXPORT_SYMBOL(dwc_free_notification_manager);
+EXPORT_SYMBOL(dwc_register_notifier);
+EXPORT_SYMBOL(dwc_unregister_notifier);
+EXPORT_SYMBOL(dwc_add_observer);
+EXPORT_SYMBOL(dwc_remove_observer);
+EXPORT_SYMBOL(dwc_notify);
+#endif
+
+/* Memory Debugging Routines */
+#ifdef DWC_DEBUG_MEMORY
+EXPORT_SYMBOL(dwc_alloc_debug);
+EXPORT_SYMBOL(dwc_alloc_atomic_debug);
+EXPORT_SYMBOL(dwc_free_debug);
+EXPORT_SYMBOL(dwc_dma_alloc_debug);
+EXPORT_SYMBOL(dwc_dma_free_debug);
+#endif
+
+EXPORT_SYMBOL(DWC_MEMSET);
+EXPORT_SYMBOL(DWC_MEMCPY);
+EXPORT_SYMBOL(DWC_MEMMOVE);
+EXPORT_SYMBOL(DWC_MEMCMP);
+EXPORT_SYMBOL(DWC_STRNCMP);
+EXPORT_SYMBOL(DWC_STRCMP);
+EXPORT_SYMBOL(DWC_STRLEN);
+EXPORT_SYMBOL(DWC_STRCPY);
+EXPORT_SYMBOL(DWC_STRDUP);
+EXPORT_SYMBOL(DWC_ATOI);
+EXPORT_SYMBOL(DWC_ATOUI);
+
+#ifdef DWC_UTFLIB
+EXPORT_SYMBOL(DWC_UTF8_TO_UTF16LE);
+#endif /* DWC_UTFLIB */
+
+EXPORT_SYMBOL(DWC_IN_IRQ);
+EXPORT_SYMBOL(DWC_IN_BH);
+EXPORT_SYMBOL(DWC_VPRINTF);
+EXPORT_SYMBOL(DWC_VSNPRINTF);
+EXPORT_SYMBOL(DWC_PRINTF);
+EXPORT_SYMBOL(DWC_SPRINTF);
+EXPORT_SYMBOL(DWC_SNPRINTF);
+EXPORT_SYMBOL(__DWC_WARN);
+EXPORT_SYMBOL(__DWC_ERROR);
+EXPORT_SYMBOL(DWC_EXCEPTION);
+
+#ifdef DEBUG
+EXPORT_SYMBOL(__DWC_DEBUG);
+#endif
+
+EXPORT_SYMBOL(__DWC_DMA_ALLOC);
+EXPORT_SYMBOL(__DWC_DMA_ALLOC_ATOMIC);
+EXPORT_SYMBOL(__DWC_DMA_FREE);
+EXPORT_SYMBOL(__DWC_ALLOC);
+EXPORT_SYMBOL(__DWC_ALLOC_ATOMIC);
+EXPORT_SYMBOL(__DWC_FREE);
+
+#ifdef DWC_CRYPTOLIB
+EXPORT_SYMBOL(DWC_RANDOM_BYTES);
+EXPORT_SYMBOL(DWC_AES_CBC);
+EXPORT_SYMBOL(DWC_SHA256);
+EXPORT_SYMBOL(DWC_HMAC_SHA256);
+#endif
+
+EXPORT_SYMBOL(DWC_CPU_TO_LE32);
+EXPORT_SYMBOL(DWC_CPU_TO_BE32);
+EXPORT_SYMBOL(DWC_LE32_TO_CPU);
+EXPORT_SYMBOL(DWC_BE32_TO_CPU);
+EXPORT_SYMBOL(DWC_CPU_TO_LE16);
+EXPORT_SYMBOL(DWC_CPU_TO_BE16);
+EXPORT_SYMBOL(DWC_LE16_TO_CPU);
+EXPORT_SYMBOL(DWC_BE16_TO_CPU);
+EXPORT_SYMBOL(DWC_READ_REG32);
+EXPORT_SYMBOL(DWC_WRITE_REG32);
+EXPORT_SYMBOL(DWC_MODIFY_REG32);
+
+#if 0
+EXPORT_SYMBOL(DWC_READ_REG64);
+EXPORT_SYMBOL(DWC_WRITE_REG64);
+EXPORT_SYMBOL(DWC_MODIFY_REG64);
+#endif
+
+EXPORT_SYMBOL(DWC_SPINLOCK_ALLOC);
+EXPORT_SYMBOL(DWC_SPINLOCK_FREE);
+EXPORT_SYMBOL(DWC_SPINLOCK);
+EXPORT_SYMBOL(DWC_SPINUNLOCK);
+EXPORT_SYMBOL(DWC_SPINLOCK_IRQSAVE);
+EXPORT_SYMBOL(DWC_SPINUNLOCK_IRQRESTORE);
+EXPORT_SYMBOL(DWC_MUTEX_ALLOC);
+
+#if (!defined(DWC_LINUX) || !defined(CONFIG_DEBUG_MUTEXES))
+EXPORT_SYMBOL(DWC_MUTEX_FREE);
+#endif
+
+EXPORT_SYMBOL(DWC_MUTEX_LOCK);
+EXPORT_SYMBOL(DWC_MUTEX_TRYLOCK);
+EXPORT_SYMBOL(DWC_MUTEX_UNLOCK);
+EXPORT_SYMBOL(DWC_UDELAY);
+EXPORT_SYMBOL(DWC_MDELAY);
+EXPORT_SYMBOL(DWC_MSLEEP);
+EXPORT_SYMBOL(DWC_TIME);
+EXPORT_SYMBOL(DWC_TIMER_ALLOC);
+EXPORT_SYMBOL(DWC_TIMER_FREE);
+EXPORT_SYMBOL(DWC_TIMER_SCHEDULE);
+EXPORT_SYMBOL(DWC_TIMER_CANCEL);
+EXPORT_SYMBOL(DWC_WAITQ_ALLOC);
+EXPORT_SYMBOL(DWC_WAITQ_FREE);
+EXPORT_SYMBOL(DWC_WAITQ_WAIT);
+EXPORT_SYMBOL(DWC_WAITQ_WAIT_TIMEOUT);
+EXPORT_SYMBOL(DWC_WAITQ_TRIGGER);
+EXPORT_SYMBOL(DWC_WAITQ_ABORT);
+EXPORT_SYMBOL(DWC_THREAD_RUN);
+EXPORT_SYMBOL(DWC_THREAD_STOP);
+EXPORT_SYMBOL(DWC_THREAD_SHOULD_STOP);
+EXPORT_SYMBOL(DWC_TASK_ALLOC);
+EXPORT_SYMBOL(DWC_TASK_FREE);
+EXPORT_SYMBOL(DWC_TASK_SCHEDULE);
+EXPORT_SYMBOL(DWC_WORKQ_WAIT_WORK_DONE);
+EXPORT_SYMBOL(DWC_WORKQ_ALLOC);
+EXPORT_SYMBOL(DWC_WORKQ_FREE);
+EXPORT_SYMBOL(DWC_WORKQ_SCHEDULE);
+EXPORT_SYMBOL(DWC_WORKQ_SCHEDULE_DELAYED);
+EXPORT_SYMBOL(DWC_WORKQ_PENDING);
+
+static int dwc_common_port_init_module(void)
+{
+       int result = 0;
+
+       printk(KERN_DEBUG "Module dwc_common_port init\n" );
+
+#ifdef DWC_DEBUG_MEMORY
+       result = dwc_memory_debug_start(NULL);
+       if (result) {
+               printk(KERN_ERR
+                      "dwc_memory_debug_start() failed with error %d\n",
+                      result);
+               return result;
+       }
+#endif
+
+#ifdef DWC_NOTIFYLIB
+       result = dwc_alloc_notification_manager(NULL, NULL);
+       if (result) {
+               printk(KERN_ERR
+                      "dwc_alloc_notification_manager() failed with error %d\n",
+                      result);
+               return result;
+       }
+#endif
+       return result;
+}
+
+static void dwc_common_port_exit_module(void)
+{
+       printk(KERN_DEBUG "Module dwc_common_port exit\n" );
+
+#ifdef DWC_NOTIFYLIB
+       dwc_free_notification_manager();
+#endif
+
+#ifdef DWC_DEBUG_MEMORY
+       dwc_memory_debug_stop();
+#endif
+}
+
+module_init(dwc_common_port_init_module);
+module_exit(dwc_common_port_exit_module);
+
+MODULE_DESCRIPTION("DWC Common Library - Portable version");
+MODULE_AUTHOR("Synopsys Inc.");
+MODULE_LICENSE ("GPL");
+
+#endif /* DWC_LIBMODULE */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_common_nbsd.c
@@ -0,0 +1,1275 @@
+#include "dwc_os.h"
+#include "dwc_list.h"
+
+#ifdef DWC_CCLIB
+# include "dwc_cc.h"
+#endif
+
+#ifdef DWC_CRYPTOLIB
+# include "dwc_modpow.h"
+# include "dwc_dh.h"
+# include "dwc_crypto.h"
+#endif
+
+#ifdef DWC_NOTIFYLIB
+# include "dwc_notifier.h"
+#endif
+
+/* OS-Level Implementations */
+
+/* This is the NetBSD 4.0.1 kernel implementation of the DWC platform library. */
+
+
+/* MISC */
+
+void *DWC_MEMSET(void *dest, uint8_t byte, uint32_t size)
+{
+       return memset(dest, byte, size);
+}
+
+void *DWC_MEMCPY(void *dest, void const *src, uint32_t size)
+{
+       return memcpy(dest, src, size);
+}
+
+void *DWC_MEMMOVE(void *dest, void *src, uint32_t size)
+{
+       bcopy(src, dest, size);
+       return dest;
+}
+
+int DWC_MEMCMP(void *m1, void *m2, uint32_t size)
+{
+       return memcmp(m1, m2, size);
+}
+
+int DWC_STRNCMP(void *s1, void *s2, uint32_t size)
+{
+       return strncmp(s1, s2, size);
+}
+
+int DWC_STRCMP(void *s1, void *s2)
+{
+       return strcmp(s1, s2);
+}
+
+int DWC_STRLEN(char const *str)
+{
+       return strlen(str);
+}
+
+char *DWC_STRCPY(char *to, char const *from)
+{
+       return strcpy(to, from);
+}
+
+char *DWC_STRDUP(char const *str)
+{
+       int len = DWC_STRLEN(str) + 1;
+       char *new = DWC_ALLOC_ATOMIC(len);
+
+       if (!new) {
+               return NULL;
+       }
+
+       DWC_MEMCPY(new, str, len);
+       return new;
+}
+
+int DWC_ATOI(char *str, int32_t *value)
+{
+       char *end = NULL;
+
+       /* NetBSD doesn't have 'strtol' in the kernel, but 'strtoul'
+        * should be equivalent on 2's complement machines
+        */
+       *value = strtoul(str, &end, 0);
+       if (*end == '\0') {
+               return 0;
+       }
+
+       return -1;
+}
+
+int DWC_ATOUI(char *str, uint32_t *value)
+{
+       char *end = NULL;
+
+       *value = strtoul(str, &end, 0);
+       if (*end == '\0') {
+               return 0;
+       }
+
+       return -1;
+}
+
+
+#ifdef DWC_UTFLIB
+/* From usbstring.c */
+
+int DWC_UTF8_TO_UTF16LE(uint8_t const *s, uint16_t *cp, unsigned len)
+{
+       int     count = 0;
+       u8      c;
+       u16     uchar;
+
+       /* this insists on correct encodings, though not minimal ones.
+        * BUT it currently rejects legit 4-byte UTF-8 code points,
+        * which need surrogate pairs.  (Unicode 3.1 can use them.)
+        */
+       while (len != 0 && (c = (u8) *s++) != 0) {
+               if (unlikely(c & 0x80)) {
+                       // 2-byte sequence:
+                       // 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
+                       if ((c & 0xe0) == 0xc0) {
+                               uchar = (c & 0x1f) << 6;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c;
+
+                       // 3-byte sequence (most CJKV characters):
+                       // zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
+                       } else if ((c & 0xf0) == 0xe0) {
+                               uchar = (c & 0x0f) << 12;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c << 6;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c;
+
+                               /* no bogus surrogates */
+                               if (0xd800 <= uchar && uchar <= 0xdfff)
+                                       goto fail;
+
+                       // 4-byte sequence (surrogate pairs, currently rare):
+                       // 11101110wwwwzzzzyy + 110111yyyyxxxxxx
+                       //     = 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx
+                       // (uuuuu = wwww + 1)
+                       // FIXME accept the surrogate code points (only)
+                       } else
+                               goto fail;
+               } else
+                       uchar = c;
+               put_unaligned (cpu_to_le16 (uchar), cp++);
+               count++;
+               len--;
+       }
+       return count;
+fail:
+       return -1;
+}
+
+#endif /* DWC_UTFLIB */
+
+
+/* dwc_debug.h */
+
+dwc_bool_t DWC_IN_IRQ(void)
+{
+//     return in_irq();
+       return 0;
+}
+
+dwc_bool_t DWC_IN_BH(void)
+{
+//     return in_softirq();
+       return 0;
+}
+
+void DWC_VPRINTF(char *format, va_list args)
+{
+       vprintf(format, args);
+}
+
+int DWC_VSNPRINTF(char *str, int size, char *format, va_list args)
+{
+       return vsnprintf(str, size, format, args);
+}
+
+void DWC_PRINTF(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+
+int DWC_SPRINTF(char *buffer, char *format, ...)
+{
+       int retval;
+       va_list args;
+
+       va_start(args, format);
+       retval = vsprintf(buffer, format, args);
+       va_end(args);
+       return retval;
+}
+
+int DWC_SNPRINTF(char *buffer, int size, char *format, ...)
+{
+       int retval;
+       va_list args;
+
+       va_start(args, format);
+       retval = vsnprintf(buffer, size, format, args);
+       va_end(args);
+       return retval;
+}
+
+void __DWC_WARN(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+
+void __DWC_ERROR(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+
+void DWC_EXCEPTION(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+//     BUG_ON(1);      ???
+}
+
+#ifdef DEBUG
+void __DWC_DEBUG(char *format, ...)
+{
+       va_list args;
+
+       va_start(args, format);
+       DWC_VPRINTF(format, args);
+       va_end(args);
+}
+#endif
+
+
+/* dwc_mem.h */
+
+#if 0
+dwc_pool_t *DWC_DMA_POOL_CREATE(uint32_t size,
+                               uint32_t align,
+                               uint32_t alloc)
+{
+       struct dma_pool *pool = dma_pool_create("Pool", NULL,
+                                               size, align, alloc);
+       return (dwc_pool_t *)pool;
+}
+
+void DWC_DMA_POOL_DESTROY(dwc_pool_t *pool)
+{
+       dma_pool_destroy((struct dma_pool *)pool);
+}
+
+void *DWC_DMA_POOL_ALLOC(dwc_pool_t *pool, uint64_t *dma_addr)
+{
+//     return dma_pool_alloc((struct dma_pool *)pool, GFP_KERNEL, dma_addr);
+       return dma_pool_alloc((struct dma_pool *)pool, M_WAITOK, dma_addr);
+}
+
+void *DWC_DMA_POOL_ZALLOC(dwc_pool_t *pool, uint64_t *dma_addr)
+{
+       void *vaddr = DWC_DMA_POOL_ALLOC(pool, dma_addr);
+       memset(..);
+}
+
+void DWC_DMA_POOL_FREE(dwc_pool_t *pool, void *vaddr, void *daddr)
+{
+       dma_pool_free(pool, vaddr, daddr);
+}
+#endif
+
+void *__DWC_DMA_ALLOC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr)
+{
+       dwc_dmactx_t *dma = (dwc_dmactx_t *)dma_ctx;
+       int error;
+
+       error = bus_dmamem_alloc(dma->dma_tag, size, 1, size, dma->segs,
+                                sizeof(dma->segs) / sizeof(dma->segs[0]),
+                                &dma->nsegs, BUS_DMA_NOWAIT);
+       if (error) {
+               printf("%s: bus_dmamem_alloc(%ju) failed: %d\n", __func__,
+                      (uintmax_t)size, error);
+               goto fail_0;
+       }
+
+       error = bus_dmamem_map(dma->dma_tag, dma->segs, dma->nsegs, size,
+                              (caddr_t *)&dma->dma_vaddr,
+                              BUS_DMA_NOWAIT | BUS_DMA_COHERENT);
+       if (error) {
+               printf("%s: bus_dmamem_map failed: %d\n", __func__, error);
+               goto fail_1;
+       }
+
+       error = bus_dmamap_create(dma->dma_tag, size, 1, size, 0,
+                                 BUS_DMA_NOWAIT, &dma->dma_map);
+       if (error) {
+               printf("%s: bus_dmamap_create failed: %d\n", __func__, error);
+               goto fail_2;
+       }
+
+       error = bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->dma_vaddr,
+                               size, NULL, BUS_DMA_NOWAIT);
+       if (error) {
+               printf("%s: bus_dmamap_load failed: %d\n", __func__, error);
+               goto fail_3;
+       }
+
+       dma->dma_paddr = (bus_addr_t)dma->segs[0].ds_addr;
+       *dma_addr = dma->dma_paddr;
+       return dma->dma_vaddr;
+
+fail_3:
+       bus_dmamap_destroy(dma->dma_tag, dma->dma_map);
+fail_2:
+       bus_dmamem_unmap(dma->dma_tag, dma->dma_vaddr, size);
+fail_1:
+       bus_dmamem_free(dma->dma_tag, dma->segs, dma->nsegs);
+fail_0:
+       dma->dma_map = NULL;
+       dma->dma_vaddr = NULL;
+       dma->nsegs = 0;
+
+       return NULL;
+}
+
+void __DWC_DMA_FREE(void *dma_ctx, uint32_t size, void *virt_addr, dwc_dma_t dma_addr)
+{
+       dwc_dmactx_t *dma = (dwc_dmactx_t *)dma_ctx;
+
+       if (dma->dma_map != NULL) {
+               bus_dmamap_sync(dma->dma_tag, dma->dma_map, 0, size,
+                               BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+               bus_dmamap_unload(dma->dma_tag, dma->dma_map);
+               bus_dmamap_destroy(dma->dma_tag, dma->dma_map);
+               bus_dmamem_unmap(dma->dma_tag, dma->dma_vaddr, size);
+               bus_dmamem_free(dma->dma_tag, dma->segs, dma->nsegs);
+               dma->dma_paddr = 0;
+               dma->dma_map = NULL;
+               dma->dma_vaddr = NULL;
+               dma->nsegs = 0;
+       }
+}
+
+void *__DWC_ALLOC(void *mem_ctx, uint32_t size)
+{
+       return malloc(size, M_DEVBUF, M_WAITOK | M_ZERO);
+}
+
+void *__DWC_ALLOC_ATOMIC(void *mem_ctx, uint32_t size)
+{
+       return malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
+}
+
+void __DWC_FREE(void *mem_ctx, void *addr)
+{
+       free(addr, M_DEVBUF);
+}
+
+
+#ifdef DWC_CRYPTOLIB
+/* dwc_crypto.h */
+
+void DWC_RANDOM_BYTES(uint8_t *buffer, uint32_t length)
+{
+       get_random_bytes(buffer, length);
+}
+
+int DWC_AES_CBC(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t iv[16], uint8_t *out)
+{
+       struct crypto_blkcipher *tfm;
+       struct blkcipher_desc desc;
+       struct scatterlist sgd;
+       struct scatterlist sgs;
+
+       tfm = crypto_alloc_blkcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC);
+       if (tfm == NULL) {
+               printk("failed to load transform for aes CBC\n");
+               return -1;
+       }
+
+       crypto_blkcipher_setkey(tfm, key, keylen);
+       crypto_blkcipher_set_iv(tfm, iv, 16);
+
+       sg_init_one(&sgd, out, messagelen);
+       sg_init_one(&sgs, message, messagelen);
+
+       desc.tfm = tfm;
+       desc.flags = 0;
+
+       if (crypto_blkcipher_encrypt(&desc, &sgd, &sgs, messagelen)) {
+               crypto_free_blkcipher(tfm);
+               DWC_ERROR("AES CBC encryption failed");
+               return -1;
+       }
+
+       crypto_free_blkcipher(tfm);
+       return 0;
+}
+
+int DWC_SHA256(uint8_t *message, uint32_t len, uint8_t *out)
+{
+       struct crypto_hash *tfm;
+       struct hash_desc desc;
+       struct scatterlist sg;
+
+       tfm = crypto_alloc_hash("sha256", 0, CRYPTO_ALG_ASYNC);
+       if (IS_ERR(tfm)) {
+               DWC_ERROR("Failed to load transform for sha256: %ld", PTR_ERR(tfm));
+               return 0;
+       }
+       desc.tfm = tfm;
+       desc.flags = 0;
+
+       sg_init_one(&sg, message, len);
+       crypto_hash_digest(&desc, &sg, len, out);
+       crypto_free_hash(tfm);
+
+       return 1;
+}
+
+int DWC_HMAC_SHA256(uint8_t *message, uint32_t messagelen,
+                   uint8_t *key, uint32_t keylen, uint8_t *out)
+{
+       struct crypto_hash *tfm;
+       struct hash_desc desc;
+       struct scatterlist sg;
+
+       tfm = crypto_alloc_hash("hmac(sha256)", 0, CRYPTO_ALG_ASYNC);
+       if (IS_ERR(tfm)) {
+               DWC_ERROR("Failed to load transform for hmac(sha256): %ld", PTR_ERR(tfm));
+               return 0;
+       }
+       desc.tfm = tfm;
+       desc.flags = 0;
+
+       sg_init_one(&sg, message, messagelen);
+       crypto_hash_setkey(tfm, key, keylen);
+       crypto_hash_digest(&desc, &sg, messagelen, out);
+       crypto_free_hash(tfm);
+
+       return 1;
+}
+
+#endif /* DWC_CRYPTOLIB */
+
+
+/* Byte Ordering Conversions */
+
+uint32_t DWC_CPU_TO_LE32(uint32_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint32_t DWC_CPU_TO_BE32(uint32_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint32_t DWC_LE32_TO_CPU(uint32_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint32_t DWC_BE32_TO_CPU(uint32_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+
+       return (u_p[3] | (u_p[2] << 8) | (u_p[1] << 16) | (u_p[0] << 24));
+#endif
+}
+
+uint16_t DWC_CPU_TO_LE16(uint16_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+uint16_t DWC_CPU_TO_BE16(uint16_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+uint16_t DWC_LE16_TO_CPU(uint16_t *p)
+{
+#ifdef __LITTLE_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+uint16_t DWC_BE16_TO_CPU(uint16_t *p)
+{
+#ifdef __BIG_ENDIAN
+       return *p;
+#else
+       uint8_t *u_p = (uint8_t *)p;
+       return (u_p[1] | (u_p[0] << 8));
+#endif
+}
+
+
+/* Registers */
+
+uint32_t DWC_READ_REG32(void *io_ctx, uint32_t volatile *reg)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       return bus_space_read_4(io->iot, io->ioh, ior);
+}
+
+#if 0
+uint64_t DWC_READ_REG64(void *io_ctx, uint64_t volatile *reg)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       return bus_space_read_8(io->iot, io->ioh, ior);
+}
+#endif
+
+void DWC_WRITE_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t value)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       bus_space_write_4(io->iot, io->ioh, ior, value);
+}
+
+#if 0
+void DWC_WRITE_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t value)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       bus_space_write_8(io->iot, io->ioh, ior, value);
+}
+#endif
+
+void DWC_MODIFY_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t clear_mask,
+                     uint32_t set_mask)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       bus_space_write_4(io->iot, io->ioh, ior,
+                         (bus_space_read_4(io->iot, io->ioh, ior) &
+                          ~clear_mask) | set_mask);
+}
+
+#if 0
+void DWC_MODIFY_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t clear_mask,
+                     uint64_t set_mask)
+{
+       dwc_ioctx_t *io = (dwc_ioctx_t *)io_ctx;
+       bus_size_t ior = (bus_size_t)reg;
+
+       bus_space_write_8(io->iot, io->ioh, ior,
+                         (bus_space_read_8(io->iot, io->ioh, ior) &
+                          ~clear_mask) | set_mask);
+}
+#endif
+
+
+/* Locking */
+
+dwc_spinlock_t *DWC_SPINLOCK_ALLOC(void)
+{
+       struct simplelock *sl = DWC_ALLOC(sizeof(*sl));
+
+       if (!sl) {
+               DWC_ERROR("Cannot allocate memory for spinlock");
+               return NULL;
+       }
+
+       simple_lock_init(sl);
+       return (dwc_spinlock_t *)sl;
+}
+
+void DWC_SPINLOCK_FREE(dwc_spinlock_t *lock)
+{
+       struct simplelock *sl = (struct simplelock *)lock;
+
+       DWC_FREE(sl);
+}
+
+void DWC_SPINLOCK(dwc_spinlock_t *lock)
+{
+       simple_lock((struct simplelock *)lock);
+}
+
+void DWC_SPINUNLOCK(dwc_spinlock_t *lock)
+{
+       simple_unlock((struct simplelock *)lock);
+}
+
+void DWC_SPINLOCK_IRQSAVE(dwc_spinlock_t *lock, dwc_irqflags_t *flags)
+{
+       simple_lock((struct simplelock *)lock);
+       *flags = splbio();
+}
+
+void DWC_SPINUNLOCK_IRQRESTORE(dwc_spinlock_t *lock, dwc_irqflags_t flags)
+{
+       splx(flags);
+       simple_unlock((struct simplelock *)lock);
+}
+
+dwc_mutex_t *DWC_MUTEX_ALLOC(void)
+{
+       dwc_mutex_t *mutex = DWC_ALLOC(sizeof(struct lock));
+
+       if (!mutex) {
+               DWC_ERROR("Cannot allocate memory for mutex");
+               return NULL;
+       }
+
+       lockinit((struct lock *)mutex, 0, "dw3mtx", 0, 0);
+       return mutex;
+}
+
+#if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES))
+#else
+void DWC_MUTEX_FREE(dwc_mutex_t *mutex)
+{
+       DWC_FREE(mutex);
+}
+#endif
+
+void DWC_MUTEX_LOCK(dwc_mutex_t *mutex)
+{
+       lockmgr((struct lock *)mutex, LK_EXCLUSIVE, NULL);
+}
+
+int DWC_MUTEX_TRYLOCK(dwc_mutex_t *mutex)
+{
+       int status;
+
+       status = lockmgr((struct lock *)mutex, LK_EXCLUSIVE | LK_NOWAIT, NULL);
+       return status == 0;
+}
+
+void DWC_MUTEX_UNLOCK(dwc_mutex_t *mutex)
+{
+       lockmgr((struct lock *)mutex, LK_RELEASE, NULL);
+}
+
+
+/* Timing */
+
+void DWC_UDELAY(uint32_t usecs)
+{
+       DELAY(usecs);
+}
+
+void DWC_MDELAY(uint32_t msecs)
+{
+       do {
+               DELAY(1000);
+       } while (--msecs);
+}
+
+void DWC_MSLEEP(uint32_t msecs)
+{
+       struct timeval tv;
+
+       tv.tv_sec = msecs / 1000;
+       tv.tv_usec = (msecs - tv.tv_sec * 1000) * 1000;
+       tsleep(&tv, 0, "dw3slp", tvtohz(&tv));
+}
+
+uint32_t DWC_TIME(void)
+{
+       struct timeval tv;
+
+       microuptime(&tv);       // or getmicrouptime? (less precise, but faster)
+       return tv.tv_sec * 1000 + tv.tv_usec / 1000;
+}
+
+
+/* Timers */
+
+struct dwc_timer {
+       struct callout t;
+       char *name;
+       dwc_spinlock_t *lock;
+       dwc_timer_callback_t cb;
+       void *data;
+};
+
+dwc_timer_t *DWC_TIMER_ALLOC(char *name, dwc_timer_callback_t cb, void *data)
+{
+       dwc_timer_t *t = DWC_ALLOC(sizeof(*t));
+
+       if (!t) {
+               DWC_ERROR("Cannot allocate memory for timer");
+               return NULL;
+       }
+
+       callout_init(&t->t);
+
+       t->name = DWC_STRDUP(name);
+       if (!t->name) {
+               DWC_ERROR("Cannot allocate memory for timer->name");
+               goto no_name;
+       }
+
+       t->lock = DWC_SPINLOCK_ALLOC();
+       if (!t->lock) {
+               DWC_ERROR("Cannot allocate memory for timer->lock");
+               goto no_lock;
+       }
+
+       t->cb = cb;
+       t->data = data;
+
+       return t;
+
+ no_lock:
+       DWC_FREE(t->name);
+ no_name:
+       DWC_FREE(t);
+
+       return NULL;
+}
+
+void DWC_TIMER_FREE(dwc_timer_t *timer)
+{
+       callout_stop(&timer->t);
+       DWC_SPINLOCK_FREE(timer->lock);
+       DWC_FREE(timer->name);
+       DWC_FREE(timer);
+}
+
+void DWC_TIMER_SCHEDULE(dwc_timer_t *timer, uint32_t time)
+{
+       struct timeval tv;
+
+       tv.tv_sec = time / 1000;
+       tv.tv_usec = (time - tv.tv_sec * 1000) * 1000;
+       callout_reset(&timer->t, tvtohz(&tv), timer->cb, timer->data);
+}
+
+void DWC_TIMER_CANCEL(dwc_timer_t *timer)
+{
+       callout_stop(&timer->t);
+}
+
+
+/* Wait Queues */
+
+struct dwc_waitq {
+       struct simplelock lock;
+       int abort;
+};
+
+dwc_waitq_t *DWC_WAITQ_ALLOC(void)
+{
+       dwc_waitq_t *wq = DWC_ALLOC(sizeof(*wq));
+
+       if (!wq) {
+               DWC_ERROR("Cannot allocate memory for waitqueue");
+               return NULL;
+       }
+
+       simple_lock_init(&wq->lock);
+       wq->abort = 0;
+
+       return wq;
+}
+
+void DWC_WAITQ_FREE(dwc_waitq_t *wq)
+{
+       DWC_FREE(wq);
+}
+
+int32_t DWC_WAITQ_WAIT(dwc_waitq_t *wq, dwc_waitq_condition_t cond, void *data)
+{
+       int ipl;
+       int result = 0;
+
+       simple_lock(&wq->lock);
+       ipl = splbio();
+
+       /* Skip the sleep if already aborted or triggered */
+       if (!wq->abort && !cond(data)) {
+               splx(ipl);
+               result = ltsleep(wq, PCATCH, "dw3wat", 0, &wq->lock); // infinite timeout
+               ipl = splbio();
+       }
+
+       if (result == 0) {                      // awoken
+               if (wq->abort) {
+                       wq->abort = 0;
+                       result = -DWC_E_ABORT;
+               } else {
+                       result = 0;
+               }
+
+               splx(ipl);
+               simple_unlock(&wq->lock);
+       } else {
+               wq->abort = 0;
+               splx(ipl);
+               simple_unlock(&wq->lock);
+
+               if (result == ERESTART) {       // signaled - restart
+                       result = -DWC_E_RESTART;
+               } else {                        // signaled - must be EINTR
+                       result = -DWC_E_ABORT;
+               }
+       }
+
+       return result;
+}
+
+int32_t DWC_WAITQ_WAIT_TIMEOUT(dwc_waitq_t *wq, dwc_waitq_condition_t cond,
+                              void *data, int32_t msecs)
+{
+       struct timeval tv, tv1, tv2;
+       int ipl;
+       int result = 0;
+
+       tv.tv_sec = msecs / 1000;
+       tv.tv_usec = (msecs - tv.tv_sec * 1000) * 1000;
+
+       simple_lock(&wq->lock);
+       ipl = splbio();
+
+       /* Skip the sleep if already aborted or triggered */
+       if (!wq->abort && !cond(data)) {
+               splx(ipl);
+               getmicrouptime(&tv1);
+               result = ltsleep(wq, PCATCH, "dw3wto", tvtohz(&tv), &wq->lock);
+               getmicrouptime(&tv2);
+               ipl = splbio();
+       }
+
+       if (result == 0) {                      // awoken
+               if (wq->abort) {
+                       wq->abort = 0;
+                       splx(ipl);
+                       simple_unlock(&wq->lock);
+                       result = -DWC_E_ABORT;
+               } else {
+                       splx(ipl);
+                       simple_unlock(&wq->lock);
+
+                       tv2.tv_usec -= tv1.tv_usec;
+                       if (tv2.tv_usec < 0) {
+                               tv2.tv_usec += 1000000;
+                               tv2.tv_sec--;
+                       }
+
+                       tv2.tv_sec -= tv1.tv_sec;
+                       result = tv2.tv_sec * 1000 + tv2.tv_usec / 1000;
+                       result = msecs - result;
+                       if (result <= 0)
+                               result = 1;
+               }
+       } else {
+               wq->abort = 0;
+               splx(ipl);
+               simple_unlock(&wq->lock);
+
+               if (result == ERESTART) {       // signaled - restart
+                       result = -DWC_E_RESTART;
+
+               } else if (result == EINTR) {           // signaled - interrupt
+                       result = -DWC_E_ABORT;
+
+               } else {                                // timed out
+                       result = -DWC_E_TIMEOUT;
+               }
+       }
+
+       return result;
+}
+
+void DWC_WAITQ_TRIGGER(dwc_waitq_t *wq)
+{
+       wakeup(wq);
+}
+
+void DWC_WAITQ_ABORT(dwc_waitq_t *wq)
+{
+       int ipl;
+
+       simple_lock(&wq->lock);
+       ipl = splbio();
+       wq->abort = 1;
+       wakeup(wq);
+       splx(ipl);
+       simple_unlock(&wq->lock);
+}
+
+
+/* Threading */
+
+struct dwc_thread {
+       struct proc *proc;
+       int abort;
+};
+
+dwc_thread_t *DWC_THREAD_RUN(dwc_thread_function_t func, char *name, void *data)
+{
+       int retval;
+       dwc_thread_t *thread = DWC_ALLOC(sizeof(*thread));
+
+       if (!thread) {
+               return NULL;
+       }
+
+       thread->abort = 0;
+       retval = kthread_create1((void (*)(void *))func, data, &thread->proc,
+                                "%s", name);
+       if (retval) {
+               DWC_FREE(thread);
+               return NULL;
+       }
+
+       return thread;
+}
+
+int DWC_THREAD_STOP(dwc_thread_t *thread)
+{
+       int retval;
+
+       thread->abort = 1;
+       retval = tsleep(&thread->abort, 0, "dw3stp", 60 * hz);
+
+       if (retval == 0) {
+               /* DWC_THREAD_EXIT() will free the thread struct */
+               return 0;
+       }
+
+       /* NOTE: We leak the thread struct if thread doesn't die */
+
+       if (retval == EWOULDBLOCK) {
+               return -DWC_E_TIMEOUT;
+       }
+
+       return -DWC_E_UNKNOWN;
+}
+
+dwc_bool_t DWC_THREAD_SHOULD_STOP(dwc_thread_t *thread)
+{
+       return thread->abort;
+}
+
+void DWC_THREAD_EXIT(dwc_thread_t *thread)
+{
+       wakeup(&thread->abort);
+       DWC_FREE(thread);
+       kthread_exit(0);
+}
+
+/* tasklets
+ - Runs in interrupt context (cannot sleep)
+ - Each tasklet runs on a single CPU
+ - Different tasklets can be running simultaneously on different CPUs
+ [ On NetBSD there is no corresponding mechanism, drivers don't have bottom-
+   halves. So we just call the callback directly from DWC_TASK_SCHEDULE() ]
+ */
+struct dwc_tasklet {
+       dwc_tasklet_callback_t cb;
+       void *data;
+};
+
+static void tasklet_callback(void *data)
+{
+       dwc_tasklet_t *task = (dwc_tasklet_t *)data;
+
+       task->cb(task->data);
+}
+
+dwc_tasklet_t *DWC_TASK_ALLOC(char *name, dwc_tasklet_callback_t cb, void *data)
+{
+       dwc_tasklet_t *task = DWC_ALLOC(sizeof(*task));
+
+       if (task) {
+               task->cb = cb;
+               task->data = data;
+       } else {
+               DWC_ERROR("Cannot allocate memory for tasklet");
+       }
+
+       return task;
+}
+
+void DWC_TASK_FREE(dwc_tasklet_t *task)
+{
+       DWC_FREE(task);
+}
+
+void DWC_TASK_SCHEDULE(dwc_tasklet_t *task)
+{
+       tasklet_callback(task);
+}
+
+
+/* workqueues
+ - Runs in process context (can sleep)
+ */
+typedef struct work_container {
+       dwc_work_callback_t cb;
+       void *data;
+       dwc_workq_t *wq;
+       char *name;
+       int hz;
+       struct work task;
+} work_container_t;
+
+struct dwc_workq {
+       struct workqueue *taskq;
+       dwc_spinlock_t *lock;
+       dwc_waitq_t *waitq;
+       int pending;
+       struct work_container *container;
+};
+
+static void do_work(struct work *task, void *data)
+{
+       dwc_workq_t *wq = (dwc_workq_t *)data;
+       work_container_t *container = wq->container;
+       dwc_irqflags_t flags;
+
+       if (container->hz) {
+               tsleep(container, 0, "dw3wrk", container->hz);
+       }
+
+       container->cb(container->data);
+       DWC_DEBUG("Work done: %s, container=%p", container->name, container);
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+       if (container->name)
+               DWC_FREE(container->name);
+       DWC_FREE(container);
+       wq->pending--;
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+       DWC_WAITQ_TRIGGER(wq->waitq);
+}
+
+static int work_done(void *data)
+{
+       dwc_workq_t *workq = (dwc_workq_t *)data;
+
+       return workq->pending == 0;
+}
+
+int DWC_WORKQ_WAIT_WORK_DONE(dwc_workq_t *workq, int timeout)
+{
+       return DWC_WAITQ_WAIT_TIMEOUT(workq->waitq, work_done, workq, timeout);
+}
+
+dwc_workq_t *DWC_WORKQ_ALLOC(char *name)
+{
+       int result;
+       dwc_workq_t *wq = DWC_ALLOC(sizeof(*wq));
+
+       if (!wq) {
+               DWC_ERROR("Cannot allocate memory for workqueue");
+               return NULL;
+       }
+
+       result = workqueue_create(&wq->taskq, name, do_work, wq, 0 /*PWAIT*/,
+                                 IPL_BIO, 0);
+       if (result) {
+               DWC_ERROR("Cannot create workqueue");
+               goto no_taskq;
+       }
+
+       wq->pending = 0;
+
+       wq->lock = DWC_SPINLOCK_ALLOC();
+       if (!wq->lock) {
+               DWC_ERROR("Cannot allocate memory for spinlock");
+               goto no_lock;
+       }
+
+       wq->waitq = DWC_WAITQ_ALLOC();
+       if (!wq->waitq) {
+               DWC_ERROR("Cannot allocate memory for waitqueue");
+               goto no_waitq;
+       }
+
+       return wq;
+
+ no_waitq:
+       DWC_SPINLOCK_FREE(wq->lock);
+ no_lock:
+       workqueue_destroy(wq->taskq);
+ no_taskq:
+       DWC_FREE(wq);
+
+       return NULL;
+}
+
+void DWC_WORKQ_FREE(dwc_workq_t *wq)
+{
+#ifdef DEBUG
+       dwc_irqflags_t flags;
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+
+       if (wq->pending != 0) {
+               struct work_container *container = wq->container;
+
+               DWC_ERROR("Destroying work queue with pending work");
+
+               if (container && container->name) {
+                       DWC_ERROR("Work %s still pending", container->name);
+               }
+       }
+
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+#endif
+       DWC_WAITQ_FREE(wq->waitq);
+       DWC_SPINLOCK_FREE(wq->lock);
+       workqueue_destroy(wq->taskq);
+       DWC_FREE(wq);
+}
+
+void DWC_WORKQ_SCHEDULE(dwc_workq_t *wq, dwc_work_callback_t cb, void *data,
+                       char *format, ...)
+{
+       dwc_irqflags_t flags;
+       work_container_t *container;
+       static char name[128];
+       va_list args;
+
+       va_start(args, format);
+       DWC_VSNPRINTF(name, 128, format, args);
+       va_end(args);
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+       wq->pending++;
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+       DWC_WAITQ_TRIGGER(wq->waitq);
+
+       container = DWC_ALLOC_ATOMIC(sizeof(*container));
+       if (!container) {
+               DWC_ERROR("Cannot allocate memory for container");
+               return;
+       }
+
+       container->name = DWC_STRDUP(name);
+       if (!container->name) {
+               DWC_ERROR("Cannot allocate memory for container->name");
+               DWC_FREE(container);
+               return;
+       }
+
+       container->cb = cb;
+       container->data = data;
+       container->wq = wq;
+       container->hz = 0;
+       wq->container = container;
+
+       DWC_DEBUG("Queueing work: %s, container=%p", container->name, container);
+       workqueue_enqueue(wq->taskq, &container->task);
+}
+
+void DWC_WORKQ_SCHEDULE_DELAYED(dwc_workq_t *wq, dwc_work_callback_t cb,
+                               void *data, uint32_t time, char *format, ...)
+{
+       dwc_irqflags_t flags;
+       work_container_t *container;
+       static char name[128];
+       struct timeval tv;
+       va_list args;
+
+       va_start(args, format);
+       DWC_VSNPRINTF(name, 128, format, args);
+       va_end(args);
+
+       DWC_SPINLOCK_IRQSAVE(wq->lock, &flags);
+       wq->pending++;
+       DWC_SPINUNLOCK_IRQRESTORE(wq->lock, flags);
+       DWC_WAITQ_TRIGGER(wq->waitq);
+
+       container = DWC_ALLOC_ATOMIC(sizeof(*container));
+       if (!container) {
+               DWC_ERROR("Cannot allocate memory for container");
+               return;
+       }
+
+       container->name = DWC_STRDUP(name);
+       if (!container->name) {
+               DWC_ERROR("Cannot allocate memory for container->name");
+               DWC_FREE(container);
+               return;
+       }
+
+       container->cb = cb;
+       container->data = data;
+       container->wq = wq;
+       tv.tv_sec = time / 1000;
+       tv.tv_usec = (time - tv.tv_sec * 1000) * 1000;
+       container->hz = tvtohz(&tv);
+       wq->container = container;
+
+       DWC_DEBUG("Queueing work: %s, container=%p", container->name, container);
+       workqueue_enqueue(wq->taskq, &container->task);
+}
+
+int DWC_WORKQ_PENDING(dwc_workq_t *wq)
+{
+       return wq->pending;
+}
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_crypto.c
@@ -0,0 +1,308 @@
+/* =========================================================================
+ * $File: //dwh/usb_iip/dev/software/dwc_common_port_2/dwc_crypto.c $
+ * $Revision: #5 $
+ * $Date: 2010/09/28 $
+ * $Change: 1596182 $
+ *
+ * Synopsys Portability Library Software and documentation
+ * (hereinafter, "Software") is an Unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing
+ * between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for
+ * Licensed Product with Synopsys or any supplement thereto. You are
+ * permitted to use and redistribute this Software in source and binary
+ * forms, with or without modification, provided that redistributions
+ * of source code must retain this notice. You may not view, use,
+ * disclose, copy or distribute this file or any information contained
+ * herein except pursuant to this license grant from Synopsys. If you
+ * do not agree with this notice, including the disclaimer below, then
+ * you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL
+ * SYNOPSYS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================= */
+
+/** @file
+ * This file contains the WUSB cryptographic routines.
+ */
+
+#ifdef DWC_CRYPTOLIB
+
+#include "dwc_crypto.h"
+#include "usb.h"
+
+#ifdef DEBUG
+static inline void dump_bytes(char *name, uint8_t *bytes, int len)
+{
+       int i;
+       DWC_PRINTF("%s: ", name);
+       for (i=0; i<len; i++) {
+               DWC_PRINTF("%02x ", bytes[i]);
+       }
+       DWC_PRINTF("\n");
+}
+#else
+#define dump_bytes(x...)
+#endif
+
+/* Display a block */
+void show_block(const u8 *blk, const char *prefix, const char *suffix, int a)
+{
+#ifdef DWC_DEBUG_CRYPTO
+       int i, blksize = 16;
+
+       DWC_DEBUG("%s", prefix);
+
+       if (suffix == NULL) {
+               suffix = "\n";
+               blksize = a;
+       }
+
+       for (i = 0; i < blksize; i++)
+               DWC_PRINT("%02x%s", *blk++, ((i & 3) == 3) ? "  " : " ");
+       DWC_PRINT(suffix);
+#endif
+}
+
+/**
+ * Encrypts an array of bytes using the AES encryption engine.
+ * If <code>dst</code> == <code>src</code>, then the bytes will be encrypted
+ * in-place.
+ *
+ * @return  0 on success, negative error code on error.
+ */
+int dwc_wusb_aes_encrypt(u8 *src, u8 *key, u8 *dst)
+{
+       u8 block_t[16];
+       DWC_MEMSET(block_t, 0, 16);
+
+       return DWC_AES_CBC(src, 16, key, 16, block_t, dst);
+}
+
+/**
+ * The CCM-MAC-FUNCTION described in section 6.5 of the WUSB spec.
+ * This function takes a data string and returns the encrypted CBC
+ * Counter-mode MIC.
+ *
+ * @param key     The 128-bit symmetric key.
+ * @param nonce   The CCM nonce.
+ * @param label   The unique 14-byte ASCII text label.
+ * @param bytes   The byte array to be encrypted.
+ * @param len     Length of the byte array.
+ * @param result  Byte array to receive the 8-byte encrypted MIC.
+ */
+void dwc_wusb_cmf(u8 *key, u8 *nonce,
+                 char *label, u8 *bytes, int len, u8 *result)
+{
+       u8 block_m[16];
+       u8 block_x[16];
+       u8 block_t[8];
+       int idx, blkNum;
+       u16 la = (u16)(len + 14);
+
+       /* Set the AES-128 key */
+       //dwc_aes_setkey(tfm, key, 16);
+
+       /* Fill block B0 from flags = 0x59, N, and l(m) = 0 */
+       block_m[0] = 0x59;
+       for (idx = 0; idx < 13; idx++)
+               block_m[idx + 1] = nonce[idx];
+       block_m[14] = 0;
+       block_m[15] = 0;
+
+       /* Produce the CBC IV */
+       dwc_wusb_aes_encrypt(block_m, key, block_x);
+       show_block(block_m, "CBC IV in: ", "\n", 0);
+       show_block(block_x, "CBC IV out:", "\n", 0);
+
+       /* Fill block B1 from l(a) = Blen + 14, and A */
+       block_x[0] ^= (u8)(la >> 8);
+       block_x[1] ^= (u8)la;
+       for (idx = 0; idx < 14; idx++)
+               block_x[idx + 2] ^= label[idx];
+       show_block(block_x, "After xor: ", "b1\n", 16);
+
+       dwc_wusb_aes_encrypt(block_x, key, block_x);
+       show_block(block_x, "After AES: ", "b1\n", 16);
+
+       idx = 0;
+       blkNum = 0;
+
+       /* Fill remaining blocks with B */
+       while (len-- > 0) {
+               block_x[idx] ^= *bytes++;
+               if (++idx >= 16) {
+                       idx = 0;
+                       show_block(block_x, "After xor: ", "\n", blkNum);
+                       dwc_wusb_aes_encrypt(block_x, key, block_x);
+                       show_block(block_x, "After AES: ", "\n", blkNum);
+                       blkNum++;
+               }
+       }
+
+       /* Handle partial last block */
+       if (idx > 0) {
+               show_block(block_x, "After xor: ", "\n", blkNum);
+               dwc_wusb_aes_encrypt(block_x, key, block_x);
+               show_block(block_x, "After AES: ", "\n", blkNum);
+       }
+
+       /* Save the MIC tag */
+       DWC_MEMCPY(block_t, block_x, 8);
+       show_block(block_t, "MIC tag  : ", NULL, 8);
+
+       /* Fill block A0 from flags = 0x01, N, and counter = 0 */
+       block_m[0] = 0x01;
+       block_m[14] = 0;
+       block_m[15] = 0;
+
+       /* Encrypt the counter */
+       dwc_wusb_aes_encrypt(block_m, key, block_x);
+       show_block(block_x, "CTR[MIC] : ", NULL, 8);
+
+       /* XOR with MIC tag */
+       for (idx = 0; idx < 8; idx++) {
+               block_t[idx] ^= block_x[idx];
+       }
+
+       /* Return result to caller */
+       DWC_MEMCPY(result, block_t, 8);
+       show_block(result, "CCM-MIC  : ", NULL, 8);
+
+}
+
+/**
+ * The PRF function described in section 6.5 of the WUSB spec. This function
+ * concatenates MIC values returned from dwc_cmf() to create a value of
+ * the requested length.
+ *
+ * @param prf_len  Length of the PRF function in bits (64, 128, or 256).
+ * @param key, nonce, label, bytes, len  Same as for dwc_cmf().
+ * @param result   Byte array to receive the result.
+ */
+void dwc_wusb_prf(int prf_len, u8 *key,
+                 u8 *nonce, char *label, u8 *bytes, int len, u8 *result)
+{
+       int i;
+
+       nonce[0] = 0;
+       for (i = 0; i < prf_len >> 6; i++, nonce[0]++) {
+               dwc_wusb_cmf(key, nonce, label, bytes, len, result);
+               result += 8;
+       }
+}
+
+/**
+ * Fills in CCM Nonce per the WUSB spec.
+ *
+ * @param[in] haddr Host address.
+ * @param[in] daddr Device address.
+ * @param[in] tkid Session Key(PTK) identifier.
+ * @param[out] nonce Pointer to where the CCM Nonce output is to be written.
+ */
+void dwc_wusb_fill_ccm_nonce(uint16_t haddr, uint16_t daddr, uint8_t *tkid,
+                            uint8_t *nonce)
+{
+
+       DWC_DEBUG("%s %x %x\n", __func__, daddr, haddr);
+
+       DWC_MEMSET(&nonce[0], 0, 16);
+
+       DWC_MEMCPY(&nonce[6], tkid, 3);
+       nonce[9] = daddr & 0xFF;
+       nonce[10] = (daddr >> 8) & 0xFF;
+       nonce[11] = haddr & 0xFF;
+       nonce[12] = (haddr >> 8) & 0xFF;
+
+       dump_bytes("CCM nonce", nonce, 16);
+}
+
+/**
+ * Generates a 16-byte cryptographic-grade random number for the Host/Device
+ * Nonce.
+ */
+void dwc_wusb_gen_nonce(uint16_t addr, uint8_t *nonce)
+{
+       uint8_t inonce[16];
+       uint32_t temp[4];
+
+       /* Fill in the Nonce */
+       DWC_MEMSET(&inonce[0], 0, sizeof(inonce));
+       inonce[9] = addr & 0xFF;
+       inonce[10] = (addr >> 8) & 0xFF;
+       inonce[11] = inonce[9];
+       inonce[12] = inonce[10];
+
+       /* Collect "randomness samples" */
+       DWC_RANDOM_BYTES((uint8_t *)temp, 16);
+
+       dwc_wusb_prf_128((uint8_t *)temp, nonce,
+                        "Random Numbers", (uint8_t *)temp, sizeof(temp),
+                        nonce);
+}
+
+/**
+ * Generates the Session Key (PTK) and Key Confirmation Key (KCK) per the
+ * WUSB spec.
+ *
+ * @param[in] ccm_nonce Pointer to CCM Nonce.
+ * @param[in] mk Master Key to derive the session from
+ * @param[in] hnonce Pointer to Host Nonce.
+ * @param[in] dnonce Pointer to Device Nonce.
+ * @param[out] kck Pointer to where the KCK output is to be written.
+ * @param[out] ptk Pointer to where the PTK output is to be written.
+ */
+void dwc_wusb_gen_key(uint8_t *ccm_nonce, uint8_t *mk, uint8_t *hnonce,
+                     uint8_t *dnonce, uint8_t *kck, uint8_t *ptk)
+{
+       uint8_t idata[32];
+       uint8_t odata[32];
+
+       dump_bytes("ck", mk, 16);
+       dump_bytes("hnonce", hnonce, 16);
+       dump_bytes("dnonce", dnonce, 16);
+
+       /* The data is the HNonce and DNonce concatenated */
+       DWC_MEMCPY(&idata[0], hnonce, 16);
+       DWC_MEMCPY(&idata[16], dnonce, 16);
+
+       dwc_wusb_prf_256(mk, ccm_nonce, "Pair-wise keys", idata, 32, odata);
+
+       /* Low 16 bytes of the result is the KCK, high 16 is the PTK */
+       DWC_MEMCPY(kck, &odata[0], 16);
+       DWC_MEMCPY(ptk, &odata[16], 16);
+
+       dump_bytes("kck", kck, 16);
+       dump_bytes("ptk", ptk, 16);
+}
+
+/**
+ * Generates the Message Integrity Code over the Handshake data per the
+ * WUSB spec.
+ *
+ * @param ccm_nonce Pointer to CCM Nonce.
+ * @param kck   Pointer to Key Confirmation Key.
+ * @param data  Pointer to Handshake data to be checked.
+ * @param mic   Pointer to where the MIC output is to be written.
+ */
+void dwc_wusb_gen_mic(uint8_t *ccm_nonce, uint8_t *kck,
+                     uint8_t *data, uint8_t *mic)
+{
+
+       dwc_wusb_prf_64(kck, ccm_nonce, "out-of-bandMIC",
+                       data, WUSB_HANDSHAKE_LEN_FOR_MIC, mic);
+}
+
+#endif /* DWC_CRYPTOLIB */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_crypto.h
@@ -0,0 +1,111 @@
+/* =========================================================================
+ * $File: //dwh/usb_iip/dev/software/dwc_common_port_2/dwc_crypto.h $
+ * $Revision: #3 $
+ * $Date: 2010/09/28 $
+ * $Change: 1596182 $
+ *
+ * Synopsys Portability Library Software and documentation
+ * (hereinafter, "Software") is an Unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing
+ * between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for
+ * Licensed Product with Synopsys or any supplement thereto. You are
+ * permitted to use and redistribute this Software in source and binary
+ * forms, with or without modification, provided that redistributions
+ * of source code must retain this notice. You may not view, use,
+ * disclose, copy or distribute this file or any information contained
+ * herein except pursuant to this license grant from Synopsys. If you
+ * do not agree with this notice, including the disclaimer below, then
+ * you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL
+ * SYNOPSYS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================= */
+
+#ifndef _DWC_CRYPTO_H_
+#define _DWC_CRYPTO_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @file
+ *
+ * This file contains declarations for the WUSB Cryptographic routines as
+ * defined in the WUSB spec.  They are only to be used internally by the DWC UWB
+ * modules.
+ */
+
+#include "dwc_os.h"
+
+int dwc_wusb_aes_encrypt(u8 *src, u8 *key, u8 *dst);
+
+void dwc_wusb_cmf(u8 *key, u8 *nonce,
+                 char *label, u8 *bytes, int len, u8 *result);
+void dwc_wusb_prf(int prf_len, u8 *key,
+                 u8 *nonce, char *label, u8 *bytes, int len, u8 *result);
+
+/**
+ * The PRF-64 function described in section 6.5 of the WUSB spec.
+ *
+ * @param key, nonce, label, bytes, len, result  Same as for dwc_prf().
+ */
+static inline void dwc_wusb_prf_64(u8 *key, u8 *nonce,
+                                  char *label, u8 *bytes, int len, u8 *result)
+{
+       dwc_wusb_prf(64, key, nonce, label, bytes, len, result);
+}
+
+/**
+ * The PRF-128 function described in section 6.5 of the WUSB spec.
+ *
+ * @param key, nonce, label, bytes, len, result  Same as for dwc_prf().
+ */
+static inline void dwc_wusb_prf_128(u8 *key, u8 *nonce,
+                                   char *label, u8 *bytes, int len, u8 *result)
+{
+       dwc_wusb_prf(128, key, nonce, label, bytes, len, result);
+}
+
+/**
+ * The PRF-256 function described in section 6.5 of the WUSB spec.
+ *
+ * @param key, nonce, label, bytes, len, result  Same as for dwc_prf().
+ */
+static inline void dwc_wusb_prf_256(u8 *key, u8 *nonce,
+                                   char *label, u8 *bytes, int len, u8 *result)
+{
+       dwc_wusb_prf(256, key, nonce, label, bytes, len, result);
+}
+
+
+void dwc_wusb_fill_ccm_nonce(uint16_t haddr, uint16_t daddr, uint8_t *tkid,
+                              uint8_t *nonce);
+void dwc_wusb_gen_nonce(uint16_t addr,
+                         uint8_t *nonce);
+
+void dwc_wusb_gen_key(uint8_t *ccm_nonce, uint8_t *mk,
+                       uint8_t *hnonce, uint8_t *dnonce,
+                       uint8_t *kck, uint8_t *ptk);
+
+
+void dwc_wusb_gen_mic(uint8_t *ccm_nonce, uint8_t
+                       *kck, uint8_t *data, uint8_t *mic);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _DWC_CRYPTO_H_ */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_dh.c
@@ -0,0 +1,291 @@
+/* =========================================================================
+ * $File: //dwh/usb_iip/dev/software/dwc_common_port_2/dwc_dh.c $
+ * $Revision: #3 $
+ * $Date: 2010/09/28 $
+ * $Change: 1596182 $
+ *
+ * Synopsys Portability Library Software and documentation
+ * (hereinafter, "Software") is an Unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing
+ * between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for
+ * Licensed Product with Synopsys or any supplement thereto. You are
+ * permitted to use and redistribute this Software in source and binary
+ * forms, with or without modification, provided that redistributions
+ * of source code must retain this notice. You may not view, use,
+ * disclose, copy or distribute this file or any information contained
+ * herein except pursuant to this license grant from Synopsys. If you
+ * do not agree with this notice, including the disclaimer below, then
+ * you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL
+ * SYNOPSYS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================= */
+#ifdef DWC_CRYPTOLIB
+
+#ifndef CONFIG_MACH_IPMATE
+
+#include "dwc_dh.h"
+#include "dwc_modpow.h"
+
+#ifdef DEBUG
+/* This function prints out a buffer in the format described in the Association
+ * Model specification. */
+static void dh_dump(char *str, void *_num, int len)
+{
+       uint8_t *num = _num;
+       int i;
+       DWC_PRINTF("%s\n", str);
+       for (i = 0; i < len; i ++) {
+               DWC_PRINTF("%02x", num[i]);
+               if (((i + 1) % 2) == 0) DWC_PRINTF(" ");
+               if (((i + 1) % 26) == 0) DWC_PRINTF("\n");
+       }
+
+       DWC_PRINTF("\n");
+}
+#else
+#define dh_dump(_x...) do {; } while(0)
+#endif
+
+/* Constant g value */
+static __u32 dh_g[] = {
+       0x02000000,
+};
+
+/* Constant p value */
+static __u32 dh_p[] = {
+       0xFFFFFFFF, 0xFFFFFFFF, 0xA2DA0FC9, 0x34C26821, 0x8B62C6C4, 0xD11CDC80, 0x084E0229, 0x74CC678A,
+       0xA6BE0B02, 0x229B133B, 0x79084A51, 0xDD04348E, 0xB31995EF, 0x1B433ACD, 0x6D0A2B30, 0x37145FF2,
+       0x6D35E14F, 0x45C2516D, 0x76B585E4, 0xC67E5E62, 0xE9424CF4, 0x6BED37A6, 0xB65CFF0B, 0xEDB706F4,
+       0xFB6B38EE, 0xA59F895A, 0x11249FAE, 0xE61F4B7C, 0x51662849, 0x3D5BE4EC, 0xB87C00C2, 0x05BF63A1,
+       0x3648DA98, 0x9AD3551C, 0xA83F1669, 0x5FCF24FD, 0x235D6583, 0x96ADA3DC, 0x56F3621C, 0xBB528520,
+       0x0729D59E, 0x6D969670, 0x4E350C67, 0x0498BC4A, 0x086C74F1, 0x7C2118CA, 0x465E9032, 0x3BCE362E,
+       0x2C779EE3, 0x03860E18, 0xA283279B, 0x8FA207EC, 0xF05DC5B5, 0xC9524C6F, 0xF6CB2BDE, 0x18175895,
+       0x7C499539, 0xE56A95EA, 0x1826D215, 0x1005FA98, 0x5A8E7215, 0x2DC4AA8A, 0x0D1733AD, 0x337A5004,
+       0xAB2155A8, 0x64BA1CDF, 0x0485FBEC, 0x0AEFDB58, 0x5771EA8A, 0x7D0C065D, 0x850F97B3, 0xC7E4E1A6,
+       0x8CAEF5AB, 0xD73309DB, 0xE0948C1E, 0x9D61254A, 0x26D2E3CE, 0x6BEED21A, 0x06FA2FF1, 0x64088AD9,
+       0x730276D8, 0x646AC83E, 0x182B1F52, 0x0C207B17, 0x5717E1BB, 0x6C5D617A, 0xC0880977, 0xE246D9BA,
+       0xA04FE208, 0x31ABE574, 0xFC5BDB43, 0x8E10FDE0, 0x20D1824B, 0xCAD23AA9, 0xFFFFFFFF, 0xFFFFFFFF,
+};
+
+static void dh_swap_bytes(void *_in, void *_out, uint32_t len)
+{
+       uint8_t *in = _in;
+       uint8_t *out = _out;
+       int i;
+       for (i=0; i<len; i++) {
+               out[i] = in[len-1-i];
+       }
+}
+
+/* Computes the modular exponentiation (num^exp % mod).  num, exp, and mod are
+ * big endian numbers of size len, in bytes.  Each len value must be a multiple
+ * of 4. */
+int dwc_dh_modpow(void *mem_ctx, void *num, uint32_t num_len,
+                 void *exp, uint32_t exp_len,
+                 void *mod, uint32_t mod_len,
+                 void *out)
+{
+       /* modpow() takes little endian numbers.  AM uses big-endian.  This
+        * function swaps bytes of numbers before passing onto modpow. */
+
+       int retval = 0;
+       uint32_t *result;
+
+       uint32_t *bignum_num = dwc_alloc(mem_ctx, num_len + 4);
+       uint32_t *bignum_exp = dwc_alloc(mem_ctx, exp_len + 4);
+       uint32_t *bignum_mod = dwc_alloc(mem_ctx, mod_len + 4);
+
+       dh_swap_bytes(num, &bignum_num[1], num_len);
+       bignum_num[0] = num_len / 4;
+
+       dh_swap_bytes(exp, &bignum_exp[1], exp_len);
+       bignum_exp[0] = exp_len / 4;
+
+       dh_swap_bytes(mod, &bignum_mod[1], mod_len);
+       bignum_mod[0] = mod_len / 4;
+
+       result = dwc_modpow(mem_ctx, bignum_num, bignum_exp, bignum_mod);
+       if (!result) {
+               retval = -1;
+               goto dh_modpow_nomem;
+       }
+
+       dh_swap_bytes(&result[1], out, result[0] * 4);
+       dwc_free(mem_ctx, result);
+
+ dh_modpow_nomem:
+       dwc_free(mem_ctx, bignum_num);
+       dwc_free(mem_ctx, bignum_exp);
+       dwc_free(mem_ctx, bignum_mod);
+       return retval;
+}
+
+
+int dwc_dh_pk(void *mem_ctx, uint8_t nd, uint8_t *exp, uint8_t *pk, uint8_t *hash)
+{
+       int retval;
+       uint8_t m3[385];
+
+#ifndef DH_TEST_VECTORS
+       DWC_RANDOM_BYTES(exp, 32);
+#endif
+
+       /* Compute the pkd */
+       if ((retval = dwc_dh_modpow(mem_ctx, dh_g, 4,
+                                   exp, 32,
+                                   dh_p, 384, pk))) {
+               return retval;
+       }
+
+       m3[384] = nd;
+       DWC_MEMCPY(&m3[0], pk, 384);
+       DWC_SHA256(m3, 385, hash);
+
+       dh_dump("PK", pk, 384);
+       dh_dump("SHA-256(M3)", hash, 32);
+       return 0;
+}
+
+int dwc_dh_derive_keys(void *mem_ctx, uint8_t nd, uint8_t *pkh, uint8_t *pkd,
+                      uint8_t *exp, int is_host,
+                      char *dd, uint8_t *ck, uint8_t *kdk)
+{
+       int retval;
+       uint8_t mv[784];
+       uint8_t sha_result[32];
+       uint8_t dhkey[384];
+       uint8_t shared_secret[384];
+       char *message;
+       uint32_t vd;
+
+       uint8_t *pk;
+
+       if (is_host) {
+               pk = pkd;
+       }
+       else {
+               pk = pkh;
+       }
+
+       if ((retval = dwc_dh_modpow(mem_ctx, pk, 384,
+                                   exp, 32,
+                                   dh_p, 384, shared_secret))) {
+               return retval;
+       }
+       dh_dump("Shared Secret", shared_secret, 384);
+
+       DWC_SHA256(shared_secret, 384, dhkey);
+       dh_dump("DHKEY", dhkey, 384);
+
+       DWC_MEMCPY(&mv[0], pkd, 384);
+       DWC_MEMCPY(&mv[384], pkh, 384);
+       DWC_MEMCPY(&mv[768], "displayed digest", 16);
+       dh_dump("MV", mv, 784);
+
+       DWC_SHA256(mv, 784, sha_result);
+       dh_dump("SHA-256(MV)", sha_result, 32);
+       dh_dump("First 32-bits of SHA-256(MV)", sha_result, 4);
+
+       dh_swap_bytes(sha_result, &vd, 4);
+#ifdef DEBUG
+       DWC_PRINTF("Vd (decimal) = %d\n", vd);
+#endif
+
+       switch (nd) {
+       case 2:
+               vd = vd % 100;
+               DWC_SPRINTF(dd, "%02d", vd);
+               break;
+       case 3:
+               vd = vd % 1000;
+               DWC_SPRINTF(dd, "%03d", vd);
+               break;
+       case 4:
+               vd = vd % 10000;
+               DWC_SPRINTF(dd, "%04d", vd);
+               break;
+       }
+#ifdef DEBUG
+       DWC_PRINTF("Display Digits: %s\n", dd);
+#endif
+
+       message = "connection key";
+       DWC_HMAC_SHA256(message, DWC_STRLEN(message), dhkey, 32, sha_result);
+       dh_dump("HMAC(SHA-256, DHKey, connection key)", sha_result, 32);
+       DWC_MEMCPY(ck, sha_result, 16);
+
+       message = "key derivation key";
+       DWC_HMAC_SHA256(message, DWC_STRLEN(message), dhkey, 32, sha_result);
+       dh_dump("HMAC(SHA-256, DHKey, key derivation key)", sha_result, 32);
+       DWC_MEMCPY(kdk, sha_result, 32);
+
+       return 0;
+}
+
+
+#ifdef DH_TEST_VECTORS
+
+static __u8 dh_a[] = {
+       0x44, 0x00, 0x51, 0xd6,
+       0xf0, 0xb5, 0x5e, 0xa9,
+       0x67, 0xab, 0x31, 0xc6,
+       0x8a, 0x8b, 0x5e, 0x37,
+       0xd9, 0x10, 0xda, 0xe0,
+       0xe2, 0xd4, 0x59, 0xa4,
+       0x86, 0x45, 0x9c, 0xaa,
+       0xdf, 0x36, 0x75, 0x16,
+};
+
+static __u8 dh_b[] = {
+       0x5d, 0xae, 0xc7, 0x86,
+       0x79, 0x80, 0xa3, 0x24,
+       0x8c, 0xe3, 0x57, 0x8f,
+       0xc7, 0x5f, 0x1b, 0x0f,
+       0x2d, 0xf8, 0x9d, 0x30,
+       0x6f, 0xa4, 0x52, 0xcd,
+       0xe0, 0x7a, 0x04, 0x8a,
+       0xde, 0xd9, 0x26, 0x56,
+};
+
+void dwc_run_dh_test_vectors(void *mem_ctx)
+{
+       uint8_t pkd[384];
+       uint8_t pkh[384];
+       uint8_t hashd[32];
+       uint8_t hashh[32];
+       uint8_t ck[16];
+       uint8_t kdk[32];
+       char dd[5];
+
+       DWC_PRINTF("\n\n\nDH_TEST_VECTORS\n\n");
+
+       /* compute the PKd and SHA-256(PKd || Nd) */
+       DWC_PRINTF("Computing PKd\n");
+       dwc_dh_pk(mem_ctx, 2, dh_a, pkd, hashd);
+
+       /* compute the PKd and SHA-256(PKh || Nd) */
+       DWC_PRINTF("Computing PKh\n");
+       dwc_dh_pk(mem_ctx, 2, dh_b, pkh, hashh);
+
+       /* compute the dhkey */
+       dwc_dh_derive_keys(mem_ctx, 2, pkh, pkd, dh_a, 0, dd, ck, kdk);
+}
+#endif /* DH_TEST_VECTORS */
+
+#endif /* !CONFIG_MACH_IPMATE */
+
+#endif /* DWC_CRYPTOLIB */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_dh.h
@@ -0,0 +1,106 @@
+/* =========================================================================
+ * $File: //dwh/usb_iip/dev/software/dwc_common_port_2/dwc_dh.h $
+ * $Revision: #4 $
+ * $Date: 2010/09/28 $
+ * $Change: 1596182 $
+ *
+ * Synopsys Portability Library Software and documentation
+ * (hereinafter, "Software") is an Unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing
+ * between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for
+ * Licensed Product with Synopsys or any supplement thereto. You are
+ * permitted to use and redistribute this Software in source and binary
+ * forms, with or without modification, provided that redistributions
+ * of source code must retain this notice. You may not view, use,
+ * disclose, copy or distribute this file or any information contained
+ * herein except pursuant to this license grant from Synopsys. If you
+ * do not agree with this notice, including the disclaimer below, then
+ * you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL
+ * SYNOPSYS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================= */
+#ifndef _DWC_DH_H_
+#define _DWC_DH_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "dwc_os.h"
+
+/** @file
+ *
+ * This file defines the common functions on device and host for performing
+ * numeric association as defined in the WUSB spec.  They are only to be
+ * used internally by the DWC UWB modules. */
+
+extern int dwc_dh_sha256(uint8_t *message, uint32_t len, uint8_t *out);
+extern int dwc_dh_hmac_sha256(uint8_t *message, uint32_t messagelen,
+                             uint8_t *key, uint32_t keylen,
+                             uint8_t *out);
+extern int dwc_dh_modpow(void *mem_ctx, void *num, uint32_t num_len,
+                        void *exp, uint32_t exp_len,
+                        void *mod, uint32_t mod_len,
+                        void *out);
+
+/** Computes PKD or PKH, and SHA-256(PKd || Nd)
+ *
+ * PK = g^exp mod p.
+ *
+ * Input:
+ * Nd = Number of digits on the device.
+ *
+ * Output:
+ * exp = A 32-byte buffer to be filled with a randomly generated number.
+ *       used as either A or B.
+ * pk = A 384-byte buffer to be filled with the PKH or PKD.
+ * hash = A 32-byte buffer to be filled with SHA-256(PK || ND).
+ */
+extern int dwc_dh_pk(void *mem_ctx, uint8_t nd, uint8_t *exp, uint8_t *pkd, uint8_t *hash);
+
+/** Computes the DHKEY, and VD.
+ *
+ * If called from host, then it will comput DHKEY=PKD^exp % p.
+ * If called from device, then it will comput DHKEY=PKH^exp % p.
+ *
+ * Input:
+ * pkd = The PKD value.
+ * pkh = The PKH value.
+ * exp = The A value (if device) or B value (if host) generated in dwc_wudev_dh_pk.
+ * is_host = Set to non zero if a WUSB host is calling this function.
+ *
+ * Output:
+
+ * dd = A pointer to an buffer to be set to the displayed digits string to be shown
+ *      to the user.  This buffer should be at 5 bytes long to hold 4 digits plus a
+ *      null termination character.  This buffer can be used directly for display.
+ * ck = A 16-byte buffer to be filled with the CK.
+ * kdk = A 32-byte buffer to be filled with the KDK.
+ */
+extern int dwc_dh_derive_keys(void *mem_ctx, uint8_t nd, uint8_t *pkh, uint8_t *pkd,
+                             uint8_t *exp, int is_host,
+                             char *dd, uint8_t *ck, uint8_t *kdk);
+
+#ifdef DH_TEST_VECTORS
+extern void dwc_run_dh_test_vectors(void);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _DWC_DH_H_ */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_list.h
@@ -0,0 +1,594 @@
+/*     $OpenBSD: queue.h,v 1.26 2004/05/04 16:59:32 grange Exp $       */
+/*     $NetBSD: queue.h,v 1.11 1996/05/16 05:17:14 mycroft Exp $       */
+
+/*
+ * Copyright (c) 1991, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *     @(#)queue.h     8.5 (Berkeley) 8/20/94
+ */
+
+#ifndef _DWC_LIST_H_
+#define _DWC_LIST_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @file
+ *
+ * This file defines linked list operations.  It is derived from BSD with
+ * only the MACRO names being prefixed with DWC_.  This is because a few of
+ * these names conflict with those on Linux.  For documentation on use, see the
+ * inline comments in the source code.  The original license for this source
+ * code applies and is preserved in the dwc_list.h source file.
+ */
+
+/*
+ * This file defines five types of data structures: singly-linked lists,
+ * lists, simple queues, tail queues, and circular queues.
+ *
+ *
+ * A singly-linked list is headed by a single forward pointer. The elements
+ * are singly linked for minimum space and pointer manipulation overhead at
+ * the expense of O(n) removal for arbitrary elements. New elements can be
+ * added to the list after an existing element or at the head of the list.
+ * Elements being removed from the head of the list should use the explicit
+ * macro for this purpose for optimum efficiency. A singly-linked list may
+ * only be traversed in the forward direction.  Singly-linked lists are ideal
+ * for applications with large datasets and few or no removals or for
+ * implementing a LIFO queue.
+ *
+ * A list is headed by a single forward pointer (or an array of forward
+ * pointers for a hash table header). The elements are doubly linked
+ * so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list before
+ * or after an existing element or at the head of the list. A list
+ * may only be traversed in the forward direction.
+ *
+ * A simple queue is headed by a pair of pointers, one the head of the
+ * list and the other to the tail of the list. The elements are singly
+ * linked to save space, so elements can only be removed from the
+ * head of the list. New elements can be added to the list before or after
+ * an existing element, at the head of the list, or at the end of the
+ * list. A simple queue may only be traversed in the forward direction.
+ *
+ * A tail queue is headed by a pair of pointers, one to the head of the
+ * list and the other to the tail of the list. The elements are doubly
+ * linked so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list before or
+ * after an existing element, at the head of the list, or at the end of
+ * the list. A tail queue may be traversed in either direction.
+ *
+ * A circle queue is headed by a pair of pointers, one to the head of the
+ * list and the other to the tail of the list. The elements are doubly
+ * linked so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list before or after
+ * an existing element, at the head of the list, or at the end of the list.
+ * A circle queue may be traversed in either direction, but has a more
+ * complex end of list detection.
+ *
+ * For details on the use of these macros, see the queue(3) manual page.
+ */
+
+/*
+ * Double-linked List.
+ */
+
+typedef struct dwc_list_link {
+       struct dwc_list_link *next;
+       struct dwc_list_link *prev;
+} dwc_list_link_t;
+
+#define DWC_LIST_INIT(link) do {       \
+       (link)->next = (link);          \
+       (link)->prev = (link);          \
+} while (0)
+
+#define DWC_LIST_FIRST(link)   ((link)->next)
+#define DWC_LIST_LAST(link)    ((link)->prev)
+#define DWC_LIST_END(link)     (link)
+#define DWC_LIST_NEXT(link)    ((link)->next)
+#define DWC_LIST_PREV(link)    ((link)->prev)
+#define DWC_LIST_EMPTY(link)   \
+       (DWC_LIST_FIRST(link) == DWC_LIST_END(link))
+#define DWC_LIST_ENTRY(link, type, field)                      \
+       (type *)((uint8_t *)(link) - (size_t)(&((type *)0)->field))
+
+#if 0
+#define DWC_LIST_INSERT_HEAD(list, link) do {                  \
+       (link)->next = (list)->next;                            \
+       (link)->prev = (list);                                  \
+       (list)->next->prev = (link);                            \
+       (list)->next = (link);                                  \
+} while (0)
+
+#define DWC_LIST_INSERT_TAIL(list, link) do {                  \
+       (link)->next = (list);                                  \
+       (link)->prev = (list)->prev;                            \
+       (list)->prev->next = (link);                            \
+       (list)->prev = (link);                                  \
+} while (0)
+#else
+#define DWC_LIST_INSERT_HEAD(list, link) do {                  \
+       dwc_list_link_t *__next__ = (list)->next;               \
+       __next__->prev = (link);                                \
+       (link)->next = __next__;                                \
+       (link)->prev = (list);                                  \
+       (list)->next = (link);                                  \
+} while (0)
+
+#define DWC_LIST_INSERT_TAIL(list, link) do {                  \
+       dwc_list_link_t *__prev__ = (list)->prev;               \
+       (list)->prev = (link);                                  \
+       (link)->next = (list);                                  \
+       (link)->prev = __prev__;                                \
+       __prev__->next = (link);                                \
+} while (0)
+#endif
+
+#if 0
+static inline void __list_add(struct list_head *new,
+                              struct list_head *prev,
+                              struct list_head *next)
+{
+        next->prev = new;
+        new->next = next;
+        new->prev = prev;
+        prev->next = new;
+}
+
+static inline void list_add(struct list_head *new, struct list_head *head)
+{
+        __list_add(new, head, head->next);
+}
+
+static inline void list_add_tail(struct list_head *new, struct list_head *head)
+{
+        __list_add(new, head->prev, head);
+}
+
+static inline void __list_del(struct list_head * prev, struct list_head * next)
+{
+        next->prev = prev;
+        prev->next = next;
+}
+
+static inline void list_del(struct list_head *entry)
+{
+        __list_del(entry->prev, entry->next);
+        entry->next = LIST_POISON1;
+        entry->prev = LIST_POISON2;
+}
+#endif
+
+#define DWC_LIST_REMOVE(link) do {                             \
+       (link)->next->prev = (link)->prev;                      \
+       (link)->prev->next = (link)->next;                      \
+} while (0)
+
+#define DWC_LIST_REMOVE_INIT(link) do {                                \
+       DWC_LIST_REMOVE(link);                                  \
+       DWC_LIST_INIT(link);                                    \
+} while (0)
+
+#define DWC_LIST_MOVE_HEAD(list, link) do {                    \
+       DWC_LIST_REMOVE(link);                                  \
+       DWC_LIST_INSERT_HEAD(list, link);                       \
+} while (0)
+
+#define DWC_LIST_MOVE_TAIL(list, link) do {                    \
+       DWC_LIST_REMOVE(link);                                  \
+       DWC_LIST_INSERT_TAIL(list, link);                       \
+} while (0)
+
+#define DWC_LIST_FOREACH(var, list)                            \
+       for((var) = DWC_LIST_FIRST(list);                       \
+           (var) != DWC_LIST_END(list);                        \
+           (var) = DWC_LIST_NEXT(var))
+
+#define DWC_LIST_FOREACH_SAFE(var, var2, list)                 \
+       for((var) = DWC_LIST_FIRST(list), (var2) = DWC_LIST_NEXT(var);  \
+           (var) != DWC_LIST_END(list);                        \
+           (var) = (var2), (var2) = DWC_LIST_NEXT(var2))
+
+#define DWC_LIST_FOREACH_REVERSE(var, list)                    \
+       for((var) = DWC_LIST_LAST(list);                        \
+           (var) != DWC_LIST_END(list);                        \
+           (var) = DWC_LIST_PREV(var))
+
+/*
+ * Singly-linked List definitions.
+ */
+#define DWC_SLIST_HEAD(name, type)                                     \
+struct name {                                                          \
+       struct type *slh_first; /* first element */                     \
+}
+
+#define DWC_SLIST_HEAD_INITIALIZER(head)                               \
+       { NULL }
+
+#define DWC_SLIST_ENTRY(type)                                          \
+struct {                                                               \
+       struct type *sle_next;  /* next element */                      \
+}
+
+/*
+ * Singly-linked List access methods.
+ */
+#define DWC_SLIST_FIRST(head)  ((head)->slh_first)
+#define DWC_SLIST_END(head)            NULL
+#define DWC_SLIST_EMPTY(head)  (SLIST_FIRST(head) == SLIST_END(head))
+#define DWC_SLIST_NEXT(elm, field)     ((elm)->field.sle_next)
+
+#define DWC_SLIST_FOREACH(var, head, field)                            \
+       for((var) = SLIST_FIRST(head);                                  \
+           (var) != SLIST_END(head);                                   \
+           (var) = SLIST_NEXT(var, field))
+
+#define DWC_SLIST_FOREACH_PREVPTR(var, varp, head, field)              \
+       for((varp) = &SLIST_FIRST((head));                              \
+           ((var) = *(varp)) != SLIST_END(head);                       \
+           (varp) = &SLIST_NEXT((var), field))
+
+/*
+ * Singly-linked List functions.
+ */
+#define DWC_SLIST_INIT(head) {                                         \
+       SLIST_FIRST(head) = SLIST_END(head);                            \
+}
+
+#define DWC_SLIST_INSERT_AFTER(slistelm, elm, field) do {              \
+       (elm)->field.sle_next = (slistelm)->field.sle_next;             \
+       (slistelm)->field.sle_next = (elm);                             \
+} while (0)
+
+#define DWC_SLIST_INSERT_HEAD(head, elm, field) do {                   \
+       (elm)->field.sle_next = (head)->slh_first;                      \
+       (head)->slh_first = (elm);                                      \
+} while (0)
+
+#define DWC_SLIST_REMOVE_NEXT(head, elm, field) do {                   \
+       (elm)->field.sle_next = (elm)->field.sle_next->field.sle_next;  \
+} while (0)
+
+#define DWC_SLIST_REMOVE_HEAD(head, field) do {                                \
+       (head)->slh_first = (head)->slh_first->field.sle_next;          \
+} while (0)
+
+#define DWC_SLIST_REMOVE(head, elm, type, field) do {                  \
+       if ((head)->slh_first == (elm)) {                               \
+               SLIST_REMOVE_HEAD((head), field);                       \
+       }                                                               \
+       else {                                                          \
+               struct type *curelm = (head)->slh_first;                \
+               while( curelm->field.sle_next != (elm) )                \
+                       curelm = curelm->field.sle_next;                \
+               curelm->field.sle_next =                                \
+                   curelm->field.sle_next->field.sle_next;             \
+       }                                                               \
+} while (0)
+
+/*
+ * Simple queue definitions.
+ */
+#define DWC_SIMPLEQ_HEAD(name, type)                                   \
+struct name {                                                          \
+       struct type *sqh_first; /* first element */                     \
+       struct type **sqh_last; /* addr of last next element */         \
+}
+
+#define DWC_SIMPLEQ_HEAD_INITIALIZER(head)                             \
+       { NULL, &(head).sqh_first }
+
+#define DWC_SIMPLEQ_ENTRY(type)                                                \
+struct {                                                               \
+       struct type *sqe_next;  /* next element */                      \
+}
+
+/*
+ * Simple queue access methods.
+ */
+#define DWC_SIMPLEQ_FIRST(head)            ((head)->sqh_first)
+#define DWC_SIMPLEQ_END(head)      NULL
+#define DWC_SIMPLEQ_EMPTY(head)            (SIMPLEQ_FIRST(head) == SIMPLEQ_END(head))
+#define DWC_SIMPLEQ_NEXT(elm, field)    ((elm)->field.sqe_next)
+
+#define DWC_SIMPLEQ_FOREACH(var, head, field)                          \
+       for((var) = SIMPLEQ_FIRST(head);                                \
+           (var) != SIMPLEQ_END(head);                                 \
+           (var) = SIMPLEQ_NEXT(var, field))
+
+/*
+ * Simple queue functions.
+ */
+#define DWC_SIMPLEQ_INIT(head) do {                                    \
+       (head)->sqh_first = NULL;                                       \
+       (head)->sqh_last = &(head)->sqh_first;                          \
+} while (0)
+
+#define DWC_SIMPLEQ_INSERT_HEAD(head, elm, field) do {                 \
+       if (((elm)->field.sqe_next = (head)->sqh_first) == NULL)        \
+               (head)->sqh_last = &(elm)->field.sqe_next;              \
+       (head)->sqh_first = (elm);                                      \
+} while (0)
+
+#define DWC_SIMPLEQ_INSERT_TAIL(head, elm, field) do {                 \
+       (elm)->field.sqe_next = NULL;                                   \
+       *(head)->sqh_last = (elm);                                      \
+       (head)->sqh_last = &(elm)->field.sqe_next;                      \
+} while (0)
+
+#define DWC_SIMPLEQ_INSERT_AFTER(head, listelm, elm, field) do {       \
+       if (((elm)->field.sqe_next = (listelm)->field.sqe_next) == NULL)\
+               (head)->sqh_last = &(elm)->field.sqe_next;              \
+       (listelm)->field.sqe_next = (elm);                              \
+} while (0)
+
+#define DWC_SIMPLEQ_REMOVE_HEAD(head, field) do {                      \
+       if (((head)->sqh_first = (head)->sqh_first->field.sqe_next) == NULL) \
+               (head)->sqh_last = &(head)->sqh_first;                  \
+} while (0)
+
+/*
+ * Tail queue definitions.
+ */
+#define DWC_TAILQ_HEAD(name, type)                                     \
+struct name {                                                          \
+       struct type *tqh_first; /* first element */                     \
+       struct type **tqh_last; /* addr of last next element */         \
+}
+
+#define DWC_TAILQ_HEAD_INITIALIZER(head)                               \
+       { NULL, &(head).tqh_first }
+
+#define DWC_TAILQ_ENTRY(type)                                          \
+struct {                                                               \
+       struct type *tqe_next;  /* next element */                      \
+       struct type **tqe_prev; /* address of previous next element */  \
+}
+
+/*
+ * tail queue access methods
+ */
+#define DWC_TAILQ_FIRST(head)          ((head)->tqh_first)
+#define DWC_TAILQ_END(head)            NULL
+#define DWC_TAILQ_NEXT(elm, field)     ((elm)->field.tqe_next)
+#define DWC_TAILQ_LAST(head, headname)                                 \
+       (*(((struct headname *)((head)->tqh_last))->tqh_last))
+/* XXX */
+#define DWC_TAILQ_PREV(elm, headname, field)                           \
+       (*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
+#define DWC_TAILQ_EMPTY(head)                                          \
+       (DWC_TAILQ_FIRST(head) == DWC_TAILQ_END(head))
+
+#define DWC_TAILQ_FOREACH(var, head, field)                            \
+       for ((var) = DWC_TAILQ_FIRST(head);                             \
+           (var) != DWC_TAILQ_END(head);                               \
+           (var) = DWC_TAILQ_NEXT(var, field))
+
+#define DWC_TAILQ_FOREACH_REVERSE(var, head, headname, field)          \
+       for ((var) = DWC_TAILQ_LAST(head, headname);                    \
+           (var) != DWC_TAILQ_END(head);                               \
+           (var) = DWC_TAILQ_PREV(var, headname, field))
+
+/*
+ * Tail queue functions.
+ */
+#define DWC_TAILQ_INIT(head) do {                                      \
+       (head)->tqh_first = NULL;                                       \
+       (head)->tqh_last = &(head)->tqh_first;                          \
+} while (0)
+
+#define DWC_TAILQ_INSERT_HEAD(head, elm, field) do {                   \
+       if (((elm)->field.tqe_next = (head)->tqh_first) != NULL)        \
+               (head)->tqh_first->field.tqe_prev =                     \
+                   &(elm)->field.tqe_next;                             \
+       else                                                            \
+               (head)->tqh_last = &(elm)->field.tqe_next;              \
+       (head)->tqh_first = (elm);                                      \
+       (elm)->field.tqe_prev = &(head)->tqh_first;                     \
+} while (0)
+
+#define DWC_TAILQ_INSERT_TAIL(head, elm, field) do {                   \
+       (elm)->field.tqe_next = NULL;                                   \
+       (elm)->field.tqe_prev = (head)->tqh_last;                       \
+       *(head)->tqh_last = (elm);                                      \
+       (head)->tqh_last = &(elm)->field.tqe_next;                      \
+} while (0)
+
+#define DWC_TAILQ_INSERT_AFTER(head, listelm, elm, field) do {         \
+       if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != NULL)\
+               (elm)->field.tqe_next->field.tqe_prev =                 \
+                   &(elm)->field.tqe_next;                             \
+       else                                                            \
+               (head)->tqh_last = &(elm)->field.tqe_next;              \
+       (listelm)->field.tqe_next = (elm);                              \
+       (elm)->field.tqe_prev = &(listelm)->field.tqe_next;             \
+} while (0)
+
+#define DWC_TAILQ_INSERT_BEFORE(listelm, elm, field) do {              \
+       (elm)->field.tqe_prev = (listelm)->field.tqe_prev;              \
+       (elm)->field.tqe_next = (listelm);                              \
+       *(listelm)->field.tqe_prev = (elm);                             \
+       (listelm)->field.tqe_prev = &(elm)->field.tqe_next;             \
+} while (0)
+
+#define DWC_TAILQ_REMOVE(head, elm, field) do {                                \
+       if (((elm)->field.tqe_next) != NULL)                            \
+               (elm)->field.tqe_next->field.tqe_prev =                 \
+                   (elm)->field.tqe_prev;                              \
+       else                                                            \
+               (head)->tqh_last = (elm)->field.tqe_prev;               \
+       *(elm)->field.tqe_prev = (elm)->field.tqe_next;                 \
+} while (0)
+
+#define DWC_TAILQ_REPLACE(head, elm, elm2, field) do {                 \
+       if (((elm2)->field.tqe_next = (elm)->field.tqe_next) != NULL)   \
+               (elm2)->field.tqe_next->field.tqe_prev =                \
+                   &(elm2)->field.tqe_next;                            \
+       else                                                            \
+               (head)->tqh_last = &(elm2)->field.tqe_next;             \
+       (elm2)->field.tqe_prev = (elm)->field.tqe_prev;                 \
+       *(elm2)->field.tqe_prev = (elm2);                               \
+} while (0)
+
+/*
+ * Circular queue definitions.
+ */
+#define DWC_CIRCLEQ_HEAD(name, type)                                   \
+struct name {                                                          \
+       struct type *cqh_first;         /* first element */             \
+       struct type *cqh_last;          /* last element */              \
+}
+
+#define DWC_CIRCLEQ_HEAD_INITIALIZER(head)                             \
+       { DWC_CIRCLEQ_END(&head), DWC_CIRCLEQ_END(&head) }
+
+#define DWC_CIRCLEQ_ENTRY(type)                                                \
+struct {                                                               \
+       struct type *cqe_next;          /* next element */              \
+       struct type *cqe_prev;          /* previous element */          \
+}
+
+/*
+ * Circular queue access methods
+ */
+#define DWC_CIRCLEQ_FIRST(head)                ((head)->cqh_first)
+#define DWC_CIRCLEQ_LAST(head)         ((head)->cqh_last)
+#define DWC_CIRCLEQ_END(head)          ((void *)(head))
+#define DWC_CIRCLEQ_NEXT(elm, field)   ((elm)->field.cqe_next)
+#define DWC_CIRCLEQ_PREV(elm, field)   ((elm)->field.cqe_prev)
+#define DWC_CIRCLEQ_EMPTY(head)                                                \
+       (DWC_CIRCLEQ_FIRST(head) == DWC_CIRCLEQ_END(head))
+
+#define DWC_CIRCLEQ_EMPTY_ENTRY(elm, field) (((elm)->field.cqe_next == NULL) && ((elm)->field.cqe_prev == NULL))
+
+#define DWC_CIRCLEQ_FOREACH(var, head, field)                          \
+       for((var) = DWC_CIRCLEQ_FIRST(head);                            \
+           (var) != DWC_CIRCLEQ_END(head);                             \
+           (var) = DWC_CIRCLEQ_NEXT(var, field))
+
+#define DWC_CIRCLEQ_FOREACH_SAFE(var, var2, head, field)                       \
+       for((var) = DWC_CIRCLEQ_FIRST(head), var2 = DWC_CIRCLEQ_NEXT(var, field); \
+           (var) != DWC_CIRCLEQ_END(head);                                     \
+           (var) = var2, var2 = DWC_CIRCLEQ_NEXT(var, field))
+
+#define DWC_CIRCLEQ_FOREACH_REVERSE(var, head, field)                  \
+       for((var) = DWC_CIRCLEQ_LAST(head);                             \
+           (var) != DWC_CIRCLEQ_END(head);                             \
+           (var) = DWC_CIRCLEQ_PREV(var, field))
+
+/*
+ * Circular queue functions.
+ */
+#define DWC_CIRCLEQ_INIT(head) do {                                    \
+       (head)->cqh_first = DWC_CIRCLEQ_END(head);                      \
+       (head)->cqh_last = DWC_CIRCLEQ_END(head);                       \
+} while (0)
+
+#define DWC_CIRCLEQ_INIT_ENTRY(elm, field) do {                                \
+       (elm)->field.cqe_next = NULL;                                   \
+       (elm)->field.cqe_prev = NULL;                                   \
+} while (0)
+
+#define DWC_CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) do {       \
+       (elm)->field.cqe_next = (listelm)->field.cqe_next;              \
+       (elm)->field.cqe_prev = (listelm);                              \
+       if ((listelm)->field.cqe_next == DWC_CIRCLEQ_END(head))         \
+               (head)->cqh_last = (elm);                               \
+       else                                                            \
+               (listelm)->field.cqe_next->field.cqe_prev = (elm);      \
+       (listelm)->field.cqe_next = (elm);                              \
+} while (0)
+
+#define DWC_CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) do {      \
+       (elm)->field.cqe_next = (listelm);                              \
+       (elm)->field.cqe_prev = (listelm)->field.cqe_prev;              \
+       if ((listelm)->field.cqe_prev == DWC_CIRCLEQ_END(head))         \
+               (head)->cqh_first = (elm);                              \
+       else                                                            \
+               (listelm)->field.cqe_prev->field.cqe_next = (elm);      \
+       (listelm)->field.cqe_prev = (elm);                              \
+} while (0)
+
+#define DWC_CIRCLEQ_INSERT_HEAD(head, elm, field) do {                 \
+       (elm)->field.cqe_next = (head)->cqh_first;                      \
+       (elm)->field.cqe_prev = DWC_CIRCLEQ_END(head);                  \
+       if ((head)->cqh_last == DWC_CIRCLEQ_END(head))                  \
+               (head)->cqh_last = (elm);                               \
+       else                                                            \
+               (head)->cqh_first->field.cqe_prev = (elm);              \
+       (head)->cqh_first = (elm);                                      \
+} while (0)
+
+#define DWC_CIRCLEQ_INSERT_TAIL(head, elm, field) do {                 \
+       (elm)->field.cqe_next = DWC_CIRCLEQ_END(head);                  \
+       (elm)->field.cqe_prev = (head)->cqh_last;                       \
+       if ((head)->cqh_first == DWC_CIRCLEQ_END(head))                 \
+               (head)->cqh_first = (elm);                              \
+       else                                                            \
+               (head)->cqh_last->field.cqe_next = (elm);               \
+       (head)->cqh_last = (elm);                                       \
+} while (0)
+
+#define DWC_CIRCLEQ_REMOVE(head, elm, field) do {                      \
+       if ((elm)->field.cqe_next == DWC_CIRCLEQ_END(head))             \
+               (head)->cqh_last = (elm)->field.cqe_prev;               \
+       else                                                            \
+               (elm)->field.cqe_next->field.cqe_prev =                 \
+                   (elm)->field.cqe_prev;                              \
+       if ((elm)->field.cqe_prev == DWC_CIRCLEQ_END(head))             \
+               (head)->cqh_first = (elm)->field.cqe_next;              \
+       else                                                            \
+               (elm)->field.cqe_prev->field.cqe_next =                 \
+                   (elm)->field.cqe_next;                              \
+} while (0)
+
+#define DWC_CIRCLEQ_REMOVE_INIT(head, elm, field) do {                 \
+       DWC_CIRCLEQ_REMOVE(head, elm, field);                           \
+       DWC_CIRCLEQ_INIT_ENTRY(elm, field);                             \
+} while (0)
+
+#define DWC_CIRCLEQ_REPLACE(head, elm, elm2, field) do {               \
+       if (((elm2)->field.cqe_next = (elm)->field.cqe_next) ==         \
+           DWC_CIRCLEQ_END(head))                                      \
+               (head).cqh_last = (elm2);                               \
+       else                                                            \
+               (elm2)->field.cqe_next->field.cqe_prev = (elm2);        \
+       if (((elm2)->field.cqe_prev = (elm)->field.cqe_prev) ==         \
+           DWC_CIRCLEQ_END(head))                                      \
+               (head).cqh_first = (elm2);                              \
+       else                                                            \
+               (elm2)->field.cqe_prev->field.cqe_next = (elm2);        \
+} while (0)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _DWC_LIST_H_ */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_mem.c
@@ -0,0 +1,245 @@
+/* Memory Debugging */
+#ifdef DWC_DEBUG_MEMORY
+
+#include "dwc_os.h"
+#include "dwc_list.h"
+
+struct allocation {
+       void *addr;
+       void *ctx;
+       char *func;
+       int line;
+       uint32_t size;
+       int dma;
+       DWC_CIRCLEQ_ENTRY(allocation) entry;
+};
+
+DWC_CIRCLEQ_HEAD(allocation_queue, allocation);
+
+struct allocation_manager {
+       void *mem_ctx;
+       struct allocation_queue allocations;
+
+       /* statistics */
+       int num;
+       int num_freed;
+       int num_active;
+       uint32_t total;
+       uint32_t cur;
+       uint32_t max;
+};
+
+static struct allocation_manager *manager = NULL;
+
+static int add_allocation(void *ctx, uint32_t size, char const *func, int line, void *addr,
+                         int dma)
+{
+       struct allocation *a;
+
+       DWC_ASSERT(manager != NULL, "manager not allocated");
+
+       a = __DWC_ALLOC_ATOMIC(manager->mem_ctx, sizeof(*a));
+       if (!a) {
+               return -DWC_E_NO_MEMORY;
+       }
+
+       a->func = __DWC_ALLOC_ATOMIC(manager->mem_ctx, DWC_STRLEN(func) + 1);
+       if (!a->func) {
+               __DWC_FREE(manager->mem_ctx, a);
+               return -DWC_E_NO_MEMORY;
+       }
+
+       DWC_MEMCPY(a->func, func, DWC_STRLEN(func) + 1);
+       a->addr = addr;
+       a->ctx = ctx;
+       a->line = line;
+       a->size = size;
+       a->dma = dma;
+       DWC_CIRCLEQ_INSERT_TAIL(&manager->allocations, a, entry);
+
+       /* Update stats */
+       manager->num++;
+       manager->num_active++;
+       manager->total += size;
+       manager->cur += size;
+
+       if (manager->max < manager->cur) {
+               manager->max = manager->cur;
+       }
+
+       return 0;
+}
+
+static struct allocation *find_allocation(void *ctx, void *addr)
+{
+       struct allocation *a;
+
+       DWC_CIRCLEQ_FOREACH(a, &manager->allocations, entry) {
+               if (a->ctx == ctx && a->addr == addr) {
+                       return a;
+               }
+       }
+
+       return NULL;
+}
+
+static void free_allocation(void *ctx, void *addr, char const *func, int line)
+{
+       struct allocation *a = find_allocation(ctx, addr);
+
+       if (!a) {
+               DWC_ASSERT(0,
+                          "Free of address %p that was never allocated or already freed %s:%d",
+                          addr, func, line);
+               return;
+       }
+
+       DWC_CIRCLEQ_REMOVE(&manager->allocations, a, entry);
+
+       manager->num_active--;
+       manager->num_freed++;
+       manager->cur -= a->size;
+       __DWC_FREE(manager->mem_ctx, a->func);
+       __DWC_FREE(manager->mem_ctx, a);
+}
+
+int dwc_memory_debug_start(void *mem_ctx)
+{
+       DWC_ASSERT(manager == NULL, "Memory debugging has already started\n");
+
+       if (manager) {
+               return -DWC_E_BUSY;
+       }
+
+       manager = __DWC_ALLOC(mem_ctx, sizeof(*manager));
+       if (!manager) {
+               return -DWC_E_NO_MEMORY;
+       }
+
+       DWC_CIRCLEQ_INIT(&manager->allocations);
+       manager->mem_ctx = mem_ctx;
+       manager->num = 0;
+       manager->num_freed = 0;
+       manager->num_active = 0;
+       manager->total = 0;
+       manager->cur = 0;
+       manager->max = 0;
+
+       return 0;
+}
+
+void dwc_memory_debug_stop(void)
+{
+       struct allocation *a;
+
+       dwc_memory_debug_report();
+
+       DWC_CIRCLEQ_FOREACH(a, &manager->allocations, entry) {
+               DWC_ERROR("Memory leaked from %s:%d\n", a->func, a->line);
+               free_allocation(a->ctx, a->addr, NULL, -1);
+       }
+
+       __DWC_FREE(manager->mem_ctx, manager);
+}
+
+void dwc_memory_debug_report(void)
+{
+       struct allocation *a;
+
+       DWC_PRINTF("\n\n\n----------------- Memory Debugging Report -----------------\n\n");
+       DWC_PRINTF("Num Allocations = %d\n", manager->num);
+       DWC_PRINTF("Freed = %d\n", manager->num_freed);
+       DWC_PRINTF("Active = %d\n", manager->num_active);
+       DWC_PRINTF("Current Memory Used = %d\n", manager->cur);
+       DWC_PRINTF("Total Memory Used = %d\n", manager->total);
+       DWC_PRINTF("Maximum Memory Used at Once = %d\n", manager->max);
+       DWC_PRINTF("Unfreed allocations:\n");
+
+       DWC_CIRCLEQ_FOREACH(a, &manager->allocations, entry) {
+               DWC_PRINTF("    addr=%p, size=%d from %s:%d, DMA=%d\n",
+                          a->addr, a->size, a->func, a->line, a->dma);
+       }
+}
+
+/* The replacement functions */
+void *dwc_alloc_debug(void *mem_ctx, uint32_t size, char const *func, int line)
+{
+       void *addr = __DWC_ALLOC(mem_ctx, size);
+
+       if (!addr) {
+               return NULL;
+       }
+
+       if (add_allocation(mem_ctx, size, func, line, addr, 0)) {
+               __DWC_FREE(mem_ctx, addr);
+               return NULL;
+       }
+
+       return addr;
+}
+
+void *dwc_alloc_atomic_debug(void *mem_ctx, uint32_t size, char const *func,
+                            int line)
+{
+       void *addr = __DWC_ALLOC_ATOMIC(mem_ctx, size);
+
+       if (!addr) {
+               return NULL;
+       }
+
+       if (add_allocation(mem_ctx, size, func, line, addr, 0)) {
+               __DWC_FREE(mem_ctx, addr);
+               return NULL;
+       }
+
+       return addr;
+}
+
+void dwc_free_debug(void *mem_ctx, void *addr, char const *func, int line)
+{
+       free_allocation(mem_ctx, addr, func, line);
+       __DWC_FREE(mem_ctx, addr);
+}
+
+void *dwc_dma_alloc_debug(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr,
+                         char const *func, int line)
+{
+       void *addr = __DWC_DMA_ALLOC(dma_ctx, size, dma_addr);
+
+       if (!addr) {
+               return NULL;
+       }
+
+       if (add_allocation(dma_ctx, size, func, line, addr, 1)) {
+               __DWC_DMA_FREE(dma_ctx, size, addr, *dma_addr);
+               return NULL;
+       }
+
+       return addr;
+}
+
+void *dwc_dma_alloc_atomic_debug(void *dma_ctx, uint32_t size,
+                                dwc_dma_t *dma_addr, char const *func, int line)
+{
+       void *addr = __DWC_DMA_ALLOC_ATOMIC(dma_ctx, size, dma_addr);
+
+       if (!addr) {
+               return NULL;
+       }
+
+       if (add_allocation(dma_ctx, size, func, line, addr, 1)) {
+               __DWC_DMA_FREE(dma_ctx, size, addr, *dma_addr);
+               return NULL;
+       }
+
+       return addr;
+}
+
+void dwc_dma_free_debug(void *dma_ctx, uint32_t size, void *virt_addr,
+                       dwc_dma_t dma_addr, char const *func, int line)
+{
+       free_allocation(dma_ctx, virt_addr, func, line);
+       __DWC_DMA_FREE(dma_ctx, size, virt_addr, dma_addr);
+}
+
+#endif /* DWC_DEBUG_MEMORY */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_modpow.c
@@ -0,0 +1,636 @@
+/* Bignum routines adapted from PUTTY sources.  PuTTY copyright notice follows.
+ *
+ * PuTTY is copyright 1997-2007 Simon Tatham.
+ *
+ * Portions copyright Robert de Bath, Joris van Rantwijk, Delian
+ * Delchev, Andreas Schultz, Jeroen Massar, Wez Furlong, Nicolas Barry,
+ * Justin Bradford, Ben Harris, Malcolm Smith, Ahmad Khalifa, Markus
+ * Kuhn, and CORE SDI S.A.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE
+ * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#ifdef DWC_CRYPTOLIB
+
+#ifndef CONFIG_MACH_IPMATE
+
+#include "dwc_modpow.h"
+
+#define BIGNUM_INT_MASK  0xFFFFFFFFUL
+#define BIGNUM_TOP_BIT   0x80000000UL
+#define BIGNUM_INT_BITS  32
+
+
+static void *snmalloc(void *mem_ctx, size_t n, size_t size)
+{
+    void *p;
+    size *= n;
+    if (size == 0) size = 1;
+    p = dwc_alloc(mem_ctx, size);
+    return p;
+}
+
+#define snewn(ctx, n, type) ((type *)snmalloc((ctx), (n), sizeof(type)))
+#define sfree dwc_free
+
+/*
+ * Usage notes:
+ *  * Do not call the DIVMOD_WORD macro with expressions such as array
+ *    subscripts, as some implementations object to this (see below).
+ *  * Note that none of the division methods below will cope if the
+ *    quotient won't fit into BIGNUM_INT_BITS. Callers should be careful
+ *    to avoid this case.
+ *    If this condition occurs, in the case of the x86 DIV instruction,
+ *    an overflow exception will occur, which (according to a correspondent)
+ *    will manifest on Windows as something like
+ *      0xC0000095: Integer overflow
+ *    The C variant won't give the right answer, either.
+ */
+
+#define MUL_WORD(w1, w2) ((BignumDblInt)w1 * w2)
+
+#if defined __GNUC__ && defined __i386__
+#define DIVMOD_WORD(q, r, hi, lo, w) \
+    __asm__("div %2" : \
+           "=d" (r), "=a" (q) : \
+           "r" (w), "d" (hi), "a" (lo))
+#else
+#define DIVMOD_WORD(q, r, hi, lo, w) do { \
+    BignumDblInt n = (((BignumDblInt)hi) << BIGNUM_INT_BITS) | lo; \
+    q = n / w; \
+    r = n % w; \
+} while (0)
+#endif
+
+//    q = n / w;
+//    r = n % w;
+
+#define BIGNUM_INT_BYTES (BIGNUM_INT_BITS / 8)
+
+#define BIGNUM_INTERNAL
+
+static Bignum newbn(void *mem_ctx, int length)
+{
+    Bignum b = snewn(mem_ctx, length + 1, BignumInt);
+    //if (!b)
+    //abort();                /* FIXME */
+    DWC_MEMSET(b, 0, (length + 1) * sizeof(*b));
+    b[0] = length;
+    return b;
+}
+
+void freebn(void *mem_ctx, Bignum b)
+{
+    /*
+     * Burn the evidence, just in case.
+     */
+    DWC_MEMSET(b, 0, sizeof(b[0]) * (b[0] + 1));
+    sfree(mem_ctx, b);
+}
+
+/*
+ * Compute c = a * b.
+ * Input is in the first len words of a and b.
+ * Result is returned in the first 2*len words of c.
+ */
+static void internal_mul(BignumInt *a, BignumInt *b,
+                        BignumInt *c, int len)
+{
+    int i, j;
+    BignumDblInt t;
+
+    for (j = 0; j < 2 * len; j++)
+       c[j] = 0;
+
+    for (i = len - 1; i >= 0; i--) {
+       t = 0;
+       for (j = len - 1; j >= 0; j--) {
+           t += MUL_WORD(a[i], (BignumDblInt) b[j]);
+           t += (BignumDblInt) c[i + j + 1];
+           c[i + j + 1] = (BignumInt) t;
+           t = t >> BIGNUM_INT_BITS;
+       }
+       c[i] = (BignumInt) t;
+    }
+}
+
+static void internal_add_shifted(BignumInt *number,
+                                unsigned n, int shift)
+{
+    int word = 1 + (shift / BIGNUM_INT_BITS);
+    int bshift = shift % BIGNUM_INT_BITS;
+    BignumDblInt addend;
+
+    addend = (BignumDblInt)n << bshift;
+
+    while (addend) {
+       addend += number[word];
+       number[word] = (BignumInt) addend & BIGNUM_INT_MASK;
+       addend >>= BIGNUM_INT_BITS;
+       word++;
+    }
+}
+
+/*
+ * Compute a = a % m.
+ * Input in first alen words of a and first mlen words of m.
+ * Output in first alen words of a
+ * (of which first alen-mlen words will be zero).
+ * The MSW of m MUST have its high bit set.
+ * Quotient is accumulated in the `quotient' array, which is a Bignum
+ * rather than the internal bigendian format. Quotient parts are shifted
+ * left by `qshift' before adding into quot.
+ */
+static void internal_mod(BignumInt *a, int alen,
+                        BignumInt *m, int mlen,
+                        BignumInt *quot, int qshift)
+{
+    BignumInt m0, m1;
+    unsigned int h;
+    int i, k;
+
+    m0 = m[0];
+    if (mlen > 1)
+       m1 = m[1];
+    else
+       m1 = 0;
+
+    for (i = 0; i <= alen - mlen; i++) {
+       BignumDblInt t;
+       unsigned int q, r, c, ai1;
+
+       if (i == 0) {
+           h = 0;
+       } else {
+           h = a[i - 1];
+           a[i - 1] = 0;
+       }
+
+       if (i == alen - 1)
+           ai1 = 0;
+       else
+           ai1 = a[i + 1];
+
+       /* Find q = h:a[i] / m0 */
+       if (h >= m0) {
+           /*
+            * Special case.
+            *
+            * To illustrate it, suppose a BignumInt is 8 bits, and
+            * we are dividing (say) A1:23:45:67 by A1:B2:C3. Then
+            * our initial division will be 0xA123 / 0xA1, which
+            * will give a quotient of 0x100 and a divide overflow.
+            * However, the invariants in this division algorithm
+            * are not violated, since the full number A1:23:... is
+            * _less_ than the quotient prefix A1:B2:... and so the
+            * following correction loop would have sorted it out.
+            *
+            * In this situation we set q to be the largest
+            * quotient we _can_ stomach (0xFF, of course).
+            */
+           q = BIGNUM_INT_MASK;
+       } else {
+           /* Macro doesn't want an array subscript expression passed
+            * into it (see definition), so use a temporary. */
+           BignumInt tmplo = a[i];
+           DIVMOD_WORD(q, r, h, tmplo, m0);
+
+           /* Refine our estimate of q by looking at
+            h:a[i]:a[i+1] / m0:m1 */
+           t = MUL_WORD(m1, q);
+           if (t > ((BignumDblInt) r << BIGNUM_INT_BITS) + ai1) {
+               q--;
+               t -= m1;
+               r = (r + m0) & BIGNUM_INT_MASK;     /* overflow? */
+               if (r >= (BignumDblInt) m0 &&
+                   t > ((BignumDblInt) r << BIGNUM_INT_BITS) + ai1) q--;
+           }
+       }
+
+       /* Subtract q * m from a[i...] */
+       c = 0;
+       for (k = mlen - 1; k >= 0; k--) {
+           t = MUL_WORD(q, m[k]);
+           t += c;
+           c = (unsigned)(t >> BIGNUM_INT_BITS);
+           if ((BignumInt) t > a[i + k])
+               c++;
+           a[i + k] -= (BignumInt) t;
+       }
+
+       /* Add back m in case of borrow */
+       if (c != h) {
+           t = 0;
+           for (k = mlen - 1; k >= 0; k--) {
+               t += m[k];
+               t += a[i + k];
+               a[i + k] = (BignumInt) t;
+               t = t >> BIGNUM_INT_BITS;
+           }
+           q--;
+       }
+       if (quot)
+           internal_add_shifted(quot, q, qshift + BIGNUM_INT_BITS * (alen - mlen - i));
+    }
+}
+
+/*
+ * Compute p % mod.
+ * The most significant word of mod MUST be non-zero.
+ * We assume that the result array is the same size as the mod array.
+ * We optionally write out a quotient if `quotient' is non-NULL.
+ * We can avoid writing out the result if `result' is NULL.
+ */
+void bigdivmod(void *mem_ctx, Bignum p, Bignum mod, Bignum result, Bignum quotient)
+{
+    BignumInt *n, *m;
+    int mshift;
+    int plen, mlen, i, j;
+
+    /* Allocate m of size mlen, copy mod to m */
+    /* We use big endian internally */
+    mlen = mod[0];
+    m = snewn(mem_ctx, mlen, BignumInt);
+    //if (!m)
+    //abort();                /* FIXME */
+    for (j = 0; j < mlen; j++)
+       m[j] = mod[mod[0] - j];
+
+    /* Shift m left to make msb bit set */
+    for (mshift = 0; mshift < BIGNUM_INT_BITS-1; mshift++)
+       if ((m[0] << mshift) & BIGNUM_TOP_BIT)
+           break;
+    if (mshift) {
+       for (i = 0; i < mlen - 1; i++)
+           m[i] = (m[i] << mshift) | (m[i + 1] >> (BIGNUM_INT_BITS - mshift));
+       m[mlen - 1] = m[mlen - 1] << mshift;
+    }
+
+    plen = p[0];
+    /* Ensure plen > mlen */
+    if (plen <= mlen)
+       plen = mlen + 1;
+
+    /* Allocate n of size plen, copy p to n */
+    n = snewn(mem_ctx, plen, BignumInt);
+    //if (!n)
+    //abort();                /* FIXME */
+    for (j = 0; j < plen; j++)
+       n[j] = 0;
+    for (j = 1; j <= (int)p[0]; j++)
+       n[plen - j] = p[j];
+
+    /* Main computation */
+    internal_mod(n, plen, m, mlen, quotient, mshift);
+
+    /* Fixup result in case the modulus was shifted */
+    if (mshift) {
+       for (i = plen - mlen - 1; i < plen - 1; i++)
+           n[i] = (n[i] << mshift) | (n[i + 1] >> (BIGNUM_INT_BITS - mshift));
+       n[plen - 1] = n[plen - 1] << mshift;
+       internal_mod(n, plen, m, mlen, quotient, 0);
+       for (i = plen - 1; i >= plen - mlen; i--)
+           n[i] = (n[i] >> mshift) | (n[i - 1] << (BIGNUM_INT_BITS - mshift));
+    }
+
+    /* Copy result to buffer */
+    if (result) {
+       for (i = 1; i <= (int)result[0]; i++) {
+           int j = plen - i;
+           result[i] = j >= 0 ? n[j] : 0;
+       }
+    }
+
+    /* Free temporary arrays */
+    for (i = 0; i < mlen; i++)
+       m[i] = 0;
+    sfree(mem_ctx, m);
+    for (i = 0; i < plen; i++)
+       n[i] = 0;
+    sfree(mem_ctx, n);
+}
+
+/*
+ * Simple remainder.
+ */
+Bignum bigmod(void *mem_ctx, Bignum a, Bignum b)
+{
+    Bignum r = newbn(mem_ctx, b[0]);
+    bigdivmod(mem_ctx, a, b, r, NULL);
+    return r;
+}
+
+/*
+ * Compute (base ^ exp) % mod.
+ */
+Bignum dwc_modpow(void *mem_ctx, Bignum base_in, Bignum exp, Bignum mod)
+{
+    BignumInt *a, *b, *n, *m;
+    int mshift;
+    int mlen, i, j;
+    Bignum base, result;
+
+    /*
+     * The most significant word of mod needs to be non-zero. It
+     * should already be, but let's make sure.
+     */
+    //assert(mod[mod[0]] != 0);
+
+    /*
+     * Make sure the base is smaller than the modulus, by reducing
+     * it modulo the modulus if not.
+     */
+    base = bigmod(mem_ctx, base_in, mod);
+
+    /* Allocate m of size mlen, copy mod to m */
+    /* We use big endian internally */
+    mlen = mod[0];
+    m = snewn(mem_ctx, mlen, BignumInt);
+    //if (!m)
+    //abort();                /* FIXME */
+    for (j = 0; j < mlen; j++)
+       m[j] = mod[mod[0] - j];
+
+    /* Shift m left to make msb bit set */
+    for (mshift = 0; mshift < BIGNUM_INT_BITS - 1; mshift++)
+       if ((m[0] << mshift) & BIGNUM_TOP_BIT)
+           break;
+    if (mshift) {
+       for (i = 0; i < mlen - 1; i++)
+           m[i] =
+               (m[i] << mshift) | (m[i + 1] >>
+                                   (BIGNUM_INT_BITS - mshift));
+       m[mlen - 1] = m[mlen - 1] << mshift;
+    }
+
+    /* Allocate n of size mlen, copy base to n */
+    n = snewn(mem_ctx, mlen, BignumInt);
+    //if (!n)
+    //abort();                /* FIXME */
+    i = mlen - base[0];
+    for (j = 0; j < i; j++)
+       n[j] = 0;
+    for (j = 0; j < base[0]; j++)
+       n[i + j] = base[base[0] - j];
+
+    /* Allocate a and b of size 2*mlen. Set a = 1 */
+    a = snewn(mem_ctx, 2 * mlen, BignumInt);
+    //if (!a)
+    //abort();                /* FIXME */
+    b = snewn(mem_ctx, 2 * mlen, BignumInt);
+    //if (!b)
+    //abort();                /* FIXME */
+    for (i = 0; i < 2 * mlen; i++)
+       a[i] = 0;
+    a[2 * mlen - 1] = 1;
+
+    /* Skip leading zero bits of exp. */
+    i = 0;
+    j = BIGNUM_INT_BITS - 1;
+    while (i < exp[0] && (exp[exp[0] - i] & (1 << j)) == 0) {
+       j--;
+       if (j < 0) {
+           i++;
+           j = BIGNUM_INT_BITS - 1;
+       }
+    }
+
+    /* Main computation */
+    while (i < exp[0]) {
+       while (j >= 0) {
+           internal_mul(a + mlen, a + mlen, b, mlen);
+           internal_mod(b, mlen * 2, m, mlen, NULL, 0);
+           if ((exp[exp[0] - i] & (1 << j)) != 0) {
+               internal_mul(b + mlen, n, a, mlen);
+               internal_mod(a, mlen * 2, m, mlen, NULL, 0);
+           } else {
+               BignumInt *t;
+               t = a;
+               a = b;
+               b = t;
+           }
+           j--;
+       }
+       i++;
+       j = BIGNUM_INT_BITS - 1;
+    }
+
+    /* Fixup result in case the modulus was shifted */
+    if (mshift) {
+       for (i = mlen - 1; i < 2 * mlen - 1; i++)
+           a[i] =
+               (a[i] << mshift) | (a[i + 1] >>
+                                   (BIGNUM_INT_BITS - mshift));
+       a[2 * mlen - 1] = a[2 * mlen - 1] << mshift;
+       internal_mod(a, mlen * 2, m, mlen, NULL, 0);
+       for (i = 2 * mlen - 1; i >= mlen; i--)
+           a[i] =
+               (a[i] >> mshift) | (a[i - 1] <<
+                                   (BIGNUM_INT_BITS - mshift));
+    }
+
+    /* Copy result to buffer */
+    result = newbn(mem_ctx, mod[0]);
+    for (i = 0; i < mlen; i++)
+       result[result[0] - i] = a[i + mlen];
+    while (result[0] > 1 && result[result[0]] == 0)
+       result[0]--;
+
+    /* Free temporary arrays */
+    for (i = 0; i < 2 * mlen; i++)
+       a[i] = 0;
+    sfree(mem_ctx, a);
+    for (i = 0; i < 2 * mlen; i++)
+       b[i] = 0;
+    sfree(mem_ctx, b);
+    for (i = 0; i < mlen; i++)
+       m[i] = 0;
+    sfree(mem_ctx, m);
+    for (i = 0; i < mlen; i++)
+       n[i] = 0;
+    sfree(mem_ctx, n);
+
+    freebn(mem_ctx, base);
+
+    return result;
+}
+
+
+#ifdef UNITTEST
+
+static __u32 dh_p[] = {
+       96,
+       0xFFFFFFFF,
+       0xFFFFFFFF,
+       0xA93AD2CA,
+       0x4B82D120,
+       0xE0FD108E,
+       0x43DB5BFC,
+       0x74E5AB31,
+       0x08E24FA0,
+       0xBAD946E2,
+       0x770988C0,
+       0x7A615D6C,
+       0xBBE11757,
+       0x177B200C,
+       0x521F2B18,
+       0x3EC86A64,
+       0xD8760273,
+       0xD98A0864,
+       0xF12FFA06,
+       0x1AD2EE6B,
+       0xCEE3D226,
+       0x4A25619D,
+       0x1E8C94E0,
+       0xDB0933D7,
+       0xABF5AE8C,
+       0xA6E1E4C7,
+       0xB3970F85,
+       0x5D060C7D,
+       0x8AEA7157,
+       0x58DBEF0A,
+       0xECFB8504,
+       0xDF1CBA64,
+       0xA85521AB,
+       0x04507A33,
+       0xAD33170D,
+       0x8AAAC42D,
+       0x15728E5A,
+       0x98FA0510,
+       0x15D22618,
+       0xEA956AE5,
+       0x3995497C,
+       0x95581718,
+       0xDE2BCBF6,
+       0x6F4C52C9,
+       0xB5C55DF0,
+       0xEC07A28F,
+       0x9B2783A2,
+       0x180E8603,
+       0xE39E772C,
+       0x2E36CE3B,
+       0x32905E46,
+       0xCA18217C,
+       0xF1746C08,
+       0x4ABC9804,
+       0x670C354E,
+       0x7096966D,
+       0x9ED52907,
+       0x208552BB,
+       0x1C62F356,
+       0xDCA3AD96,
+       0x83655D23,
+       0xFD24CF5F,
+       0x69163FA8,
+       0x1C55D39A,
+       0x98DA4836,
+       0xA163BF05,
+       0xC2007CB8,
+       0xECE45B3D,
+       0x49286651,
+       0x7C4B1FE6,
+       0xAE9F2411,
+       0x5A899FA5,
+       0xEE386BFB,
+       0xF406B7ED,
+       0x0BFF5CB6,
+       0xA637ED6B,
+       0xF44C42E9,
+       0x625E7EC6,
+       0xE485B576,
+       0x6D51C245,
+       0x4FE1356D,
+       0xF25F1437,
+       0x302B0A6D,
+       0xCD3A431B,
+       0xEF9519B3,
+       0x8E3404DD,
+       0x514A0879,
+       0x3B139B22,
+       0x020BBEA6,
+       0x8A67CC74,
+       0x29024E08,
+       0x80DC1CD1,
+       0xC4C6628B,
+       0x2168C234,
+       0xC90FDAA2,
+       0xFFFFFFFF,
+       0xFFFFFFFF,
+};
+
+static __u32 dh_a[] = {
+       8,
+       0xdf367516,
+       0x86459caa,
+       0xe2d459a4,
+       0xd910dae0,
+       0x8a8b5e37,
+       0x67ab31c6,
+       0xf0b55ea9,
+       0x440051d6,
+};
+
+static __u32 dh_b[] = {
+       8,
+       0xded92656,
+       0xe07a048a,
+       0x6fa452cd,
+       0x2df89d30,
+       0xc75f1b0f,
+       0x8ce3578f,
+       0x7980a324,
+       0x5daec786,
+};
+
+static __u32 dh_g[] = {
+       1,
+       2,
+};
+
+int main(void)
+{
+       int i;
+       __u32 *k;
+       k = dwc_modpow(NULL, dh_g, dh_a, dh_p);
+
+       printf("\n\n");
+       for (i=0; i<k[0]; i++) {
+               __u32 word32 = k[k[0] - i];
+               __u16 l = word32 & 0xffff;
+               __u16 m = (word32 & 0xffff0000) >> 16;
+               printf("%04x %04x ", m, l);
+               if (!((i + 1)%13)) printf("\n");
+       }
+       printf("\n\n");
+
+       if ((k[0] == 0x60) && (k[1] == 0x28e490e5) && (k[0x60] == 0x5a0d3d4e)) {
+               printf("PASS\n\n");
+       }
+       else {
+               printf("FAIL\n\n");
+       }
+
+}
+
+#endif /* UNITTEST */
+
+#endif /* CONFIG_MACH_IPMATE */
+
+#endif /*DWC_CRYPTOLIB */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_modpow.h
@@ -0,0 +1,34 @@
+/*
+ * dwc_modpow.h
+ * See dwc_modpow.c for license and changes
+ */
+#ifndef _DWC_MODPOW_H
+#define _DWC_MODPOW_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "dwc_os.h"
+
+/** @file
+ *
+ * This file defines the module exponentiation function which is only used
+ * internally by the DWC UWB modules for calculation of PKs during numeric
+ * association.  The routine is taken from the PUTTY, an open source terminal
+ * emulator.  The PUTTY License is preserved in the dwc_modpow.c file.
+ *
+ */
+
+typedef uint32_t BignumInt;
+typedef uint64_t BignumDblInt;
+typedef BignumInt *Bignum;
+
+/* Compute modular exponentiaion */
+extern Bignum dwc_modpow(void *mem_ctx, Bignum base_in, Bignum exp, Bignum mod);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _LINUX_BIGNUM_H */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_notifier.c
@@ -0,0 +1,319 @@
+#ifdef DWC_NOTIFYLIB
+
+#include "dwc_notifier.h"
+#include "dwc_list.h"
+
+typedef struct dwc_observer {
+       void *observer;
+       dwc_notifier_callback_t callback;
+       void *data;
+       char *notification;
+       DWC_CIRCLEQ_ENTRY(dwc_observer) list_entry;
+} observer_t;
+
+DWC_CIRCLEQ_HEAD(observer_queue, dwc_observer);
+
+typedef struct dwc_notifier {
+       void *mem_ctx;
+       void *object;
+       struct observer_queue observers;
+       DWC_CIRCLEQ_ENTRY(dwc_notifier) list_entry;
+} notifier_t;
+
+DWC_CIRCLEQ_HEAD(notifier_queue, dwc_notifier);
+
+typedef struct manager {
+       void *mem_ctx;
+       void *wkq_ctx;
+       dwc_workq_t *wq;
+//     dwc_mutex_t *mutex;
+       struct notifier_queue notifiers;
+} manager_t;
+
+static manager_t *manager = NULL;
+
+static int create_manager(void *mem_ctx, void *wkq_ctx)
+{
+       manager = dwc_alloc(mem_ctx, sizeof(manager_t));
+       if (!manager) {
+               return -DWC_E_NO_MEMORY;
+       }
+
+       DWC_CIRCLEQ_INIT(&manager->notifiers);
+
+       manager->wq = dwc_workq_alloc(wkq_ctx, "DWC Notification WorkQ");
+       if (!manager->wq) {
+               return -DWC_E_NO_MEMORY;
+       }
+
+       return 0;
+}
+
+static void free_manager(void)
+{
+       dwc_workq_free(manager->wq);
+
+       /* All notifiers must have unregistered themselves before this module
+        * can be removed.  Hitting this assertion indicates a programmer
+        * error. */
+       DWC_ASSERT(DWC_CIRCLEQ_EMPTY(&manager->notifiers),
+                  "Notification manager being freed before all notifiers have been removed");
+       dwc_free(manager->mem_ctx, manager);
+}
+
+#ifdef DEBUG
+static void dump_manager(void)
+{
+       notifier_t *n;
+       observer_t *o;
+
+       DWC_ASSERT(manager, "Notification manager not found");
+
+       DWC_DEBUG("List of all notifiers and observers:\n");
+       DWC_CIRCLEQ_FOREACH(n, &manager->notifiers, list_entry) {
+               DWC_DEBUG("Notifier %p has observers:\n", n->object);
+               DWC_CIRCLEQ_FOREACH(o, &n->observers, list_entry) {
+                       DWC_DEBUG("    %p watching %s\n", o->observer, o->notification);
+               }
+       }
+}
+#else
+#define dump_manager(...)
+#endif
+
+static observer_t *alloc_observer(void *mem_ctx, void *observer, char *notification,
+                                 dwc_notifier_callback_t callback, void *data)
+{
+       observer_t *new_observer = dwc_alloc(mem_ctx, sizeof(observer_t));
+
+       if (!new_observer) {
+               return NULL;
+       }
+
+       DWC_CIRCLEQ_INIT_ENTRY(new_observer, list_entry);
+       new_observer->observer = observer;
+       new_observer->notification = notification;
+       new_observer->callback = callback;
+       new_observer->data = data;
+       return new_observer;
+}
+
+static void free_observer(void *mem_ctx, observer_t *observer)
+{
+       dwc_free(mem_ctx, observer);
+}
+
+static notifier_t *alloc_notifier(void *mem_ctx, void *object)
+{
+       notifier_t *notifier;
+
+       if (!object) {
+               return NULL;
+       }
+
+       notifier = dwc_alloc(mem_ctx, sizeof(notifier_t));
+       if (!notifier) {
+               return NULL;
+       }
+
+       DWC_CIRCLEQ_INIT(&notifier->observers);
+       DWC_CIRCLEQ_INIT_ENTRY(notifier, list_entry);
+
+       notifier->mem_ctx = mem_ctx;
+       notifier->object = object;
+       return notifier;
+}
+
+static void free_notifier(notifier_t *notifier)
+{
+       observer_t *observer;
+
+       DWC_CIRCLEQ_FOREACH(observer, &notifier->observers, list_entry) {
+               free_observer(notifier->mem_ctx, observer);
+       }
+
+       dwc_free(notifier->mem_ctx, notifier);
+}
+
+static notifier_t *find_notifier(void *object)
+{
+       notifier_t *notifier;
+
+       DWC_ASSERT(manager, "Notification manager not found");
+
+       if (!object) {
+               return NULL;
+       }
+
+       DWC_CIRCLEQ_FOREACH(notifier, &manager->notifiers, list_entry) {
+               if (notifier->object == object) {
+                       return notifier;
+               }
+       }
+
+       return NULL;
+}
+
+int dwc_alloc_notification_manager(void *mem_ctx, void *wkq_ctx)
+{
+       return create_manager(mem_ctx, wkq_ctx);
+}
+
+void dwc_free_notification_manager(void)
+{
+       free_manager();
+}
+
+dwc_notifier_t *dwc_register_notifier(void *mem_ctx, void *object)
+{
+       notifier_t *notifier;
+
+       DWC_ASSERT(manager, "Notification manager not found");
+
+       notifier = find_notifier(object);
+       if (notifier) {
+               DWC_ERROR("Notifier %p is already registered\n", object);
+               return NULL;
+       }
+
+       notifier = alloc_notifier(mem_ctx, object);
+       if (!notifier) {
+               return NULL;
+       }
+
+       DWC_CIRCLEQ_INSERT_TAIL(&manager->notifiers, notifier, list_entry);
+
+       DWC_INFO("Notifier %p registered", object);
+       dump_manager();
+
+       return notifier;
+}
+
+void dwc_unregister_notifier(dwc_notifier_t *notifier)
+{
+       DWC_ASSERT(manager, "Notification manager not found");
+
+       if (!DWC_CIRCLEQ_EMPTY(&notifier->observers)) {
+               observer_t *o;
+
+               DWC_ERROR("Notifier %p has active observers when removing\n", notifier->object);
+               DWC_CIRCLEQ_FOREACH(o, &notifier->observers, list_entry) {
+                       DWC_DEBUGC("    %p watching %s\n", o->observer, o->notification);
+               }
+
+               DWC_ASSERT(DWC_CIRCLEQ_EMPTY(&notifier->observers),
+                          "Notifier %p has active observers when removing", notifier);
+       }
+
+       DWC_CIRCLEQ_REMOVE_INIT(&manager->notifiers, notifier, list_entry);
+       free_notifier(notifier);
+
+       DWC_INFO("Notifier unregistered");
+       dump_manager();
+}
+
+/* Add an observer to observe the notifier for a particular state, event, or notification. */
+int dwc_add_observer(void *observer, void *object, char *notification,
+                    dwc_notifier_callback_t callback, void *data)
+{
+       notifier_t *notifier = find_notifier(object);
+       observer_t *new_observer;
+
+       if (!notifier) {
+               DWC_ERROR("Notifier %p is not found when adding observer\n", object);
+               return -DWC_E_INVALID;
+       }
+
+       new_observer = alloc_observer(notifier->mem_ctx, observer, notification, callback, data);
+       if (!new_observer) {
+               return -DWC_E_NO_MEMORY;
+       }
+
+       DWC_CIRCLEQ_INSERT_TAIL(&notifier->observers, new_observer, list_entry);
+
+       DWC_INFO("Added observer %p to notifier %p observing notification %s, callback=%p, data=%p",
+                observer, object, notification, callback, data);
+
+       dump_manager();
+       return 0;
+}
+
+int dwc_remove_observer(void *observer)
+{
+       notifier_t *n;
+
+       DWC_ASSERT(manager, "Notification manager not found");
+
+       DWC_CIRCLEQ_FOREACH(n, &manager->notifiers, list_entry) {
+               observer_t *o;
+               observer_t *o2;
+
+               DWC_CIRCLEQ_FOREACH_SAFE(o, o2, &n->observers, list_entry) {
+                       if (o->observer == observer) {
+                               DWC_CIRCLEQ_REMOVE_INIT(&n->observers, o, list_entry);
+                               DWC_INFO("Removing observer %p from notifier %p watching notification %s:",
+                                        o->observer, n->object, o->notification);
+                               free_observer(n->mem_ctx, o);
+                       }
+               }
+       }
+
+       dump_manager();
+       return 0;
+}
+
+typedef struct callback_data {
+       void *mem_ctx;
+       dwc_notifier_callback_t cb;
+       void *observer;
+       void *data;
+       void *object;
+       char *notification;
+       void *notification_data;
+} cb_data_t;
+
+static void cb_task(void *data)
+{
+       cb_data_t *cb = (cb_data_t *)data;
+
+       cb->cb(cb->object, cb->notification, cb->observer, cb->notification_data, cb->data);
+       dwc_free(cb->mem_ctx, cb);
+}
+
+void dwc_notify(dwc_notifier_t *notifier, char *notification, void *notification_data)
+{
+       observer_t *o;
+
+       DWC_ASSERT(manager, "Notification manager not found");
+
+       DWC_CIRCLEQ_FOREACH(o, &notifier->observers, list_entry) {
+               int len = DWC_STRLEN(notification);
+
+               if (DWC_STRLEN(o->notification) != len) {
+                       continue;
+               }
+
+               if (DWC_STRNCMP(o->notification, notification, len) == 0) {
+                       cb_data_t *cb_data = dwc_alloc(notifier->mem_ctx, sizeof(cb_data_t));
+
+                       if (!cb_data) {
+                               DWC_ERROR("Failed to allocate callback data\n");
+                               return;
+                       }
+
+                       cb_data->mem_ctx = notifier->mem_ctx;
+                       cb_data->cb = o->callback;
+                       cb_data->observer = o->observer;
+                       cb_data->data = o->data;
+                       cb_data->object = notifier->object;
+                       cb_data->notification = notification;
+                       cb_data->notification_data = notification_data;
+                       DWC_DEBUGC("Observer found %p for notification %s\n", o->observer, notification);
+                       DWC_WORKQ_SCHEDULE(manager->wq, cb_task, cb_data,
+                                          "Notify callback from %p for Notification %s, to observer %p",
+                                          cb_data->object, notification, cb_data->observer);
+               }
+       }
+}
+
+#endif /* DWC_NOTIFYLIB */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_notifier.h
@@ -0,0 +1,122 @@
+
+#ifndef __DWC_NOTIFIER_H__
+#define __DWC_NOTIFIER_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "dwc_os.h"
+
+/** @file
+ *
+ * A simple implementation of the Observer pattern.  Any "module" can
+ * register as an observer or notifier.  The notion of "module" is abstract and
+ * can mean anything used to identify either an observer or notifier.  Usually
+ * it will be a pointer to a data structure which contains some state, ie an
+ * object.
+ *
+ * Before any notifiers can be added, the global notification manager must be
+ * brought up with dwc_alloc_notification_manager().
+ * dwc_free_notification_manager() will bring it down and free all resources.
+ * These would typically be called upon module load and unload.  The
+ * notification manager is a single global instance that handles all registered
+ * observable modules and observers so this should be done only once.
+ *
+ * A module can be observable by using Notifications to publicize some general
+ * information about it's state or operation.  It does not care who listens, or
+ * even if anyone listens, or what they do with the information.  The observable
+ * modules do not need to know any information about it's observers or their
+ * interface, or their state or data.
+ *
+ * Any module can register to emit Notifications.  It should publish a list of
+ * notifications that it can emit and their behavior, such as when they will get
+ * triggered, and what information will be provided to the observer.  Then it
+ * should register itself as an observable module. See dwc_register_notifier().
+ *
+ * Any module can observe any observable, registered module, provided it has a
+ * handle to the other module and knows what notifications to observe.  See
+ * dwc_add_observer().
+ *
+ * A function of type dwc_notifier_callback_t is called whenever a notification
+ * is triggered with one or more observers observing it.  This function is
+ * called in it's own process so it may sleep or block if needed.  It is
+ * guaranteed to be called sometime after the notification has occurred and will
+ * be called once per each time the notification is triggered.  It will NOT be
+ * called in the same process context used to trigger the notification.
+ *
+ * @section Limitiations
+ *
+ * Keep in mind that Notifications that can be triggered in rapid sucession may
+ * schedule too many processes too handle.  Be aware of this limitation when
+ * designing to use notifications, and only add notifications for appropriate
+ * observable information.
+ *
+ * Also Notification callbacks are not synchronous.  If you need to synchronize
+ * the behavior between module/observer you must use other means.  And perhaps
+ * that will mean Notifications are not the proper solution.
+ */
+
+struct dwc_notifier;
+typedef struct dwc_notifier dwc_notifier_t;
+
+/** The callback function must be of this type.
+ *
+ * @param object This is the object that is being observed.
+ * @param notification This is the notification that was triggered.
+ * @param observer This is the observer
+ * @param notification_data This is notification-specific data that the notifier
+ * has included in this notification.  The value of this should be published in
+ * the documentation of the observable module with the notifications.
+ * @param user_data This is any custom data that the observer provided when
+ * adding itself as an observer to the notification. */
+typedef void (*dwc_notifier_callback_t)(void *object, char *notification, void *observer,
+                                       void *notification_data, void *user_data);
+
+/** Brings up the notification manager. */
+extern int dwc_alloc_notification_manager(void *mem_ctx, void *wkq_ctx);
+/** Brings down the notification manager. */
+extern void dwc_free_notification_manager(void);
+
+/** This function registers an observable module.  A dwc_notifier_t object is
+ * returned to the observable module.  This is an opaque object that is used by
+ * the observable module to trigger notifications.  This object should only be
+ * accessible to functions that are authorized to trigger notifications for this
+ * module.  Observers do not need this object. */
+extern dwc_notifier_t *dwc_register_notifier(void *mem_ctx, void *object);
+
+/** This function unregisters an observable module.  All observers have to be
+ * removed prior to unregistration. */
+extern void dwc_unregister_notifier(dwc_notifier_t *notifier);
+
+/** Add a module as an observer to the observable module.  The observable module
+ * needs to have previously registered with the notification manager.
+ *
+ * @param observer The observer module
+ * @param object The module to observe
+ * @param notification The notification to observe
+ * @param callback The callback function to call
+ * @param user_data Any additional user data to pass into the callback function */
+extern int dwc_add_observer(void *observer, void *object, char *notification,
+                           dwc_notifier_callback_t callback, void *user_data);
+
+/** Removes the specified observer from all notifications that it is currently
+ * observing. */
+extern int dwc_remove_observer(void *observer);
+
+/** This function triggers a Notification.  It should be called by the
+ * observable module, or any module or library which the observable module
+ * allows to trigger notification on it's behalf.  Such as the dwc_cc_t.
+ *
+ * dwc_notify is a non-blocking function.  Callbacks are scheduled called in
+ * their own process context for each trigger.  Callbacks can be blocking.
+ * dwc_notify can be called from interrupt context if needed.
+ *
+ */
+void dwc_notify(dwc_notifier_t *notifier, char *notification, void *notification_data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __DWC_NOTIFIER_H__ */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/dwc_os.h
@@ -0,0 +1,1276 @@
+/* =========================================================================
+ * $File: //dwh/usb_iip/dev/software/dwc_common_port_2/dwc_os.h $
+ * $Revision: #14 $
+ * $Date: 2010/11/04 $
+ * $Change: 1621695 $
+ *
+ * Synopsys Portability Library Software and documentation
+ * (hereinafter, "Software") is an Unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing
+ * between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for
+ * Licensed Product with Synopsys or any supplement thereto. You are
+ * permitted to use and redistribute this Software in source and binary
+ * forms, with or without modification, provided that redistributions
+ * of source code must retain this notice. You may not view, use,
+ * disclose, copy or distribute this file or any information contained
+ * herein except pursuant to this license grant from Synopsys. If you
+ * do not agree with this notice, including the disclaimer below, then
+ * you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL
+ * SYNOPSYS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================= */
+#ifndef _DWC_OS_H_
+#define _DWC_OS_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @file
+ *
+ * DWC portability library, low level os-wrapper functions
+ *
+ */
+
+/* These basic types need to be defined by some OS header file or custom header
+ * file for your specific target architecture.
+ *
+ * uint8_t, int8_t, uint16_t, int16_t, uint32_t, int32_t, uint64_t, int64_t
+ *
+ * Any custom or alternate header file must be added and enabled here.
+ */
+
+#ifdef DWC_LINUX
+# include <linux/types.h>
+# ifdef CONFIG_DEBUG_MUTEXES
+#  include <linux/mutex.h>
+# endif
+# include <linux/spinlock.h>
+# include <linux/errno.h>
+# include <stdarg.h>
+#endif
+
+#if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
+# include <os_dep.h>
+#endif
+
+
+/** @name Primitive Types and Values */
+
+/** We define a boolean type for consistency.  Can be either YES or NO */
+typedef uint8_t dwc_bool_t;
+#define YES  1
+#define NO   0
+
+#ifdef DWC_LINUX
+
+/** @name Error Codes */
+#define DWC_E_INVALID          EINVAL
+#define DWC_E_NO_MEMORY                ENOMEM
+#define DWC_E_NO_DEVICE                ENODEV
+#define DWC_E_NOT_SUPPORTED    EOPNOTSUPP
+#define DWC_E_TIMEOUT          ETIMEDOUT
+#define DWC_E_BUSY             EBUSY
+#define DWC_E_AGAIN            EAGAIN
+#define DWC_E_RESTART          ERESTART
+#define DWC_E_ABORT            ECONNABORTED
+#define DWC_E_SHUTDOWN         ESHUTDOWN
+#define DWC_E_NO_DATA          ENODATA
+#define DWC_E_DISCONNECT       ECONNRESET
+#define DWC_E_UNKNOWN          EINVAL
+#define DWC_E_NO_STREAM_RES    ENOSR
+#define DWC_E_COMMUNICATION    ECOMM
+#define DWC_E_OVERFLOW         EOVERFLOW
+#define DWC_E_PROTOCOL         EPROTO
+#define DWC_E_IN_PROGRESS      EINPROGRESS
+#define DWC_E_PIPE             EPIPE
+#define DWC_E_IO               EIO
+#define DWC_E_NO_SPACE         ENOSPC
+
+#else
+
+/** @name Error Codes */
+#define DWC_E_INVALID          1001
+#define DWC_E_NO_MEMORY                1002
+#define DWC_E_NO_DEVICE                1003
+#define DWC_E_NOT_SUPPORTED    1004
+#define DWC_E_TIMEOUT          1005
+#define DWC_E_BUSY             1006
+#define DWC_E_AGAIN            1007
+#define DWC_E_RESTART          1008
+#define DWC_E_ABORT            1009
+#define DWC_E_SHUTDOWN         1010
+#define DWC_E_NO_DATA          1011
+#define DWC_E_DISCONNECT       2000
+#define DWC_E_UNKNOWN          3000
+#define DWC_E_NO_STREAM_RES    4001
+#define DWC_E_COMMUNICATION    4002
+#define DWC_E_OVERFLOW         4003
+#define DWC_E_PROTOCOL         4004
+#define DWC_E_IN_PROGRESS      4005
+#define DWC_E_PIPE             4006
+#define DWC_E_IO               4007
+#define DWC_E_NO_SPACE         4008
+
+#endif
+
+
+/** @name Tracing/Logging Functions
+ *
+ * These function provide the capability to add tracing, debugging, and error
+ * messages, as well exceptions as assertions.  The WUDEV uses these
+ * extensively.  These could be logged to the main console, the serial port, an
+ * internal buffer, etc.  These functions could also be no-op if they are too
+ * expensive on your system.  By default undefining the DEBUG macro already
+ * no-ops some of these functions. */
+
+/** Returns non-zero if in interrupt context. */
+extern dwc_bool_t DWC_IN_IRQ(void);
+#define dwc_in_irq DWC_IN_IRQ
+
+/** Returns "IRQ" if DWC_IN_IRQ is true. */
+static inline char *dwc_irq(void) {
+       return DWC_IN_IRQ() ? "IRQ" : "";
+}
+
+/** Returns non-zero if in bottom-half context. */
+extern dwc_bool_t DWC_IN_BH(void);
+#define dwc_in_bh DWC_IN_BH
+
+/** Returns "BH" if DWC_IN_BH is true. */
+static inline char *dwc_bh(void) {
+       return DWC_IN_BH() ? "BH" : "";
+}
+
+/**
+ * A vprintf() clone.  Just call vprintf if you've got it.
+ */
+extern void DWC_VPRINTF(char *format, va_list args);
+#define dwc_vprintf DWC_VPRINTF
+
+/**
+ * A vsnprintf() clone.  Just call vprintf if you've got it.
+ */
+extern int DWC_VSNPRINTF(char *str, int size, char *format, va_list args);
+#define dwc_vsnprintf DWC_VSNPRINTF
+
+/**
+ * printf() clone.  Just call printf if you've go it.
+ */
+extern void DWC_PRINTF(char *format, ...)
+/* This provides compiler level static checking of the parameters if you're
+ * using GCC. */
+#ifdef __GNUC__
+       __attribute__ ((format(printf, 1, 2)));
+#else
+       ;
+#endif
+#define dwc_printf DWC_PRINTF
+
+/**
+ * sprintf() clone.  Just call sprintf if you've got it.
+ */
+extern int DWC_SPRINTF(char *string, char *format, ...)
+#ifdef __GNUC__
+       __attribute__ ((format(printf, 2, 3)));
+#else
+       ;
+#endif
+#define dwc_sprintf DWC_SPRINTF
+
+/**
+ * snprintf() clone.  Just call snprintf if you've got it.
+ */
+extern int DWC_SNPRINTF(char *string, int size, char *format, ...)
+#ifdef __GNUC__
+       __attribute__ ((format(printf, 3, 4)));
+#else
+       ;
+#endif
+#define dwc_snprintf DWC_SNPRINTF
+
+/**
+ * Prints a WARNING message.  On systems that don't differentiate between
+ * warnings and regular log messages, just print it.  Indicates that something
+ * may be wrong with the driver.  Works like printf().
+ *
+ * Use the DWC_WARN macro to call this function.
+ */
+extern void __DWC_WARN(char *format, ...)
+#ifdef __GNUC__
+       __attribute__ ((format(printf, 1, 2)));
+#else
+       ;
+#endif
+
+/**
+ * Prints an error message.  On systems that don't differentiate between errors
+ * and regular log messages, just print it.  Indicates that something went wrong
+ * with the driver.  Works like printf().
+ *
+ * Use the DWC_ERROR macro to call this function.
+ */
+extern void __DWC_ERROR(char *format, ...)
+#ifdef __GNUC__
+       __attribute__ ((format(printf, 1, 2)));
+#else
+       ;
+#endif
+
+/**
+ * Prints an exception error message and takes some user-defined action such as
+ * print out a backtrace or trigger a breakpoint.  Indicates that something went
+ * abnormally wrong with the driver such as programmer error, or other
+ * exceptional condition.  It should not be ignored so even on systems without
+ * printing capability, some action should be taken to notify the developer of
+ * it.  Works like printf().
+ */
+extern void DWC_EXCEPTION(char *format, ...)
+#ifdef __GNUC__
+       __attribute__ ((format(printf, 1, 2)));
+#else
+       ;
+#endif
+#define dwc_exception DWC_EXCEPTION
+
+#ifndef DWC_OTG_DEBUG_LEV
+#define DWC_OTG_DEBUG_LEV 0
+#endif
+
+#ifdef DEBUG
+/**
+ * Prints out a debug message.  Used for logging/trace messages.
+ *
+ * Use the DWC_DEBUG macro to call this function
+ */
+extern void __DWC_DEBUG(char *format, ...)
+#ifdef __GNUC__
+       __attribute__ ((format(printf, 1, 2)));
+#else
+       ;
+#endif
+#else
+#define __DWC_DEBUG printk
+#endif
+
+/**
+ * Prints out a Debug message.
+ */
+#define DWC_DEBUG(_format, _args...) __DWC_DEBUG("DEBUG:%s:%s: " _format "\n", \
+                                                __func__, dwc_irq(), ## _args)
+#define dwc_debug DWC_DEBUG
+/**
+ * Prints out a Debug message if enabled at compile time.
+ */
+#if DWC_OTG_DEBUG_LEV > 0
+#define DWC_DEBUGC(_format, _args...) DWC_DEBUG(_format, ##_args )
+#else
+#define DWC_DEBUGC(_format, _args...)
+#endif
+#define dwc_debugc DWC_DEBUGC
+/**
+ * Prints out an informative message.
+ */
+#define DWC_INFO(_format, _args...) DWC_PRINTF("INFO:%s: " _format "\n", \
+                                              dwc_irq(), ## _args)
+#define dwc_info DWC_INFO
+/**
+ * Prints out an informative message if enabled at compile time.
+ */
+#if DWC_OTG_DEBUG_LEV > 1
+#define DWC_INFOC(_format, _args...) DWC_INFO(_format, ##_args )
+#else
+#define DWC_INFOC(_format, _args...)
+#endif
+#define dwc_infoc DWC_INFOC
+/**
+ * Prints out a warning message.
+ */
+#define DWC_WARN(_format, _args...) __DWC_WARN("WARN:%s:%s:%d: " _format "\n", \
+                                       dwc_irq(), __func__, __LINE__, ## _args)
+#define dwc_warn DWC_WARN
+/**
+ * Prints out an error message.
+ */
+#define DWC_ERROR(_format, _args...) __DWC_ERROR("ERROR:%s:%s:%d: " _format "\n", \
+                                       dwc_irq(), __func__, __LINE__, ## _args)
+#define dwc_error DWC_ERROR
+
+#define DWC_PROTO_ERROR(_format, _args...) __DWC_WARN("ERROR:%s:%s:%d: " _format "\n", \
+                                               dwc_irq(), __func__, __LINE__, ## _args)
+#define dwc_proto_error DWC_PROTO_ERROR
+
+#ifdef DEBUG
+/** Prints out a exception error message if the _expr expression fails.  Disabled
+ * if DEBUG is not enabled. */
+#define DWC_ASSERT(_expr, _format, _args...) do { \
+       if (!(_expr)) { DWC_EXCEPTION("%s:%s:%d: " _format "\n", dwc_irq(), \
+                                     __FILE__, __LINE__, ## _args); } \
+       } while (0)
+#else
+#define DWC_ASSERT(_x...)
+#endif
+#define dwc_assert DWC_ASSERT
+
+
+/** @name Byte Ordering
+ * The following functions are for conversions between processor's byte ordering
+ * and specific ordering you want.
+ */
+
+/** Converts 32 bit data in CPU byte ordering to little endian. */
+extern uint32_t DWC_CPU_TO_LE32(uint32_t *p);
+#define dwc_cpu_to_le32 DWC_CPU_TO_LE32
+
+/** Converts 32 bit data in CPU byte orderint to big endian. */
+extern uint32_t DWC_CPU_TO_BE32(uint32_t *p);
+#define dwc_cpu_to_be32 DWC_CPU_TO_BE32
+
+/** Converts 32 bit little endian data to CPU byte ordering. */
+extern uint32_t DWC_LE32_TO_CPU(uint32_t *p);
+#define dwc_le32_to_cpu DWC_LE32_TO_CPU
+
+/** Converts 32 bit big endian data to CPU byte ordering. */
+extern uint32_t DWC_BE32_TO_CPU(uint32_t *p);
+#define dwc_be32_to_cpu DWC_BE32_TO_CPU
+
+/** Converts 16 bit data in CPU byte ordering to little endian. */
+extern uint16_t DWC_CPU_TO_LE16(uint16_t *p);
+#define dwc_cpu_to_le16 DWC_CPU_TO_LE16
+
+/** Converts 16 bit data in CPU byte orderint to big endian. */
+extern uint16_t DWC_CPU_TO_BE16(uint16_t *p);
+#define dwc_cpu_to_be16 DWC_CPU_TO_BE16
+
+/** Converts 16 bit little endian data to CPU byte ordering. */
+extern uint16_t DWC_LE16_TO_CPU(uint16_t *p);
+#define dwc_le16_to_cpu DWC_LE16_TO_CPU
+
+/** Converts 16 bit bi endian data to CPU byte ordering. */
+extern uint16_t DWC_BE16_TO_CPU(uint16_t *p);
+#define dwc_be16_to_cpu DWC_BE16_TO_CPU
+
+
+/** @name Register Read/Write
+ *
+ * The following six functions should be implemented to read/write registers of
+ * 32-bit and 64-bit sizes.  All modules use this to read/write register values.
+ * The reg value is a pointer to the register calculated from the void *base
+ * variable passed into the driver when it is started.  */
+
+#ifdef DWC_LINUX
+/* Linux doesn't need any extra parameters for register read/write, so we
+ * just throw away the IO context parameter.
+ */
+/** Reads the content of a 32-bit register. */
+extern uint32_t DWC_READ_REG32(uint32_t volatile *reg);
+#define dwc_read_reg32(_ctx_,_reg_) DWC_READ_REG32(_reg_)
+
+/** Reads the content of a 64-bit register. */
+extern uint64_t DWC_READ_REG64(uint64_t volatile *reg);
+#define dwc_read_reg64(_ctx_,_reg_) DWC_READ_REG64(_reg_)
+
+/** Writes to a 32-bit register. */
+extern void DWC_WRITE_REG32(uint32_t volatile *reg, uint32_t value);
+#define dwc_write_reg32(_ctx_,_reg_,_val_) DWC_WRITE_REG32(_reg_, _val_)
+
+/** Writes to a 64-bit register. */
+extern void DWC_WRITE_REG64(uint64_t volatile *reg, uint64_t value);
+#define dwc_write_reg64(_ctx_,_reg_,_val_) DWC_WRITE_REG64(_reg_, _val_)
+
+/**
+ * Modify bit values in a register.  Using the
+ * algorithm: (reg_contents & ~clear_mask) | set_mask.
+ */
+extern void DWC_MODIFY_REG32(uint32_t volatile *reg, uint32_t clear_mask, uint32_t set_mask);
+#define dwc_modify_reg32(_ctx_,_reg_,_cmsk_,_smsk_) DWC_MODIFY_REG32(_reg_,_cmsk_,_smsk_)
+extern void DWC_MODIFY_REG64(uint64_t volatile *reg, uint64_t clear_mask, uint64_t set_mask);
+#define dwc_modify_reg64(_ctx_,_reg_,_cmsk_,_smsk_) DWC_MODIFY_REG64(_reg_,_cmsk_,_smsk_)
+
+#endif /* DWC_LINUX */
+
+#if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
+typedef struct dwc_ioctx {
+       struct device *dev;
+       bus_space_tag_t iot;
+       bus_space_handle_t ioh;
+} dwc_ioctx_t;
+
+/** BSD needs two extra parameters for register read/write, so we pass
+ * them in using the IO context parameter.
+ */
+/** Reads the content of a 32-bit register. */
+extern uint32_t DWC_READ_REG32(void *io_ctx, uint32_t volatile *reg);
+#define dwc_read_reg32 DWC_READ_REG32
+
+/** Reads the content of a 64-bit register. */
+extern uint64_t DWC_READ_REG64(void *io_ctx, uint64_t volatile *reg);
+#define dwc_read_reg64 DWC_READ_REG64
+
+/** Writes to a 32-bit register. */
+extern void DWC_WRITE_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t value);
+#define dwc_write_reg32 DWC_WRITE_REG32
+
+/** Writes to a 64-bit register. */
+extern void DWC_WRITE_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t value);
+#define dwc_write_reg64 DWC_WRITE_REG64
+
+/**
+ * Modify bit values in a register.  Using the
+ * algorithm: (reg_contents & ~clear_mask) | set_mask.
+ */
+extern void DWC_MODIFY_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t clear_mask, uint32_t set_mask);
+#define dwc_modify_reg32 DWC_MODIFY_REG32
+extern void DWC_MODIFY_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t clear_mask, uint64_t set_mask);
+#define dwc_modify_reg64 DWC_MODIFY_REG64
+
+#endif /* DWC_FREEBSD || DWC_NETBSD */
+
+/** @cond */
+
+/** @name Some convenience MACROS used internally.  Define DWC_DEBUG_REGS to log the
+ * register writes. */
+
+#ifdef DWC_LINUX
+
+# ifdef DWC_DEBUG_REGS
+
+#define dwc_define_read_write_reg_n(_reg,_container_type) \
+static inline uint32_t dwc_read_##_reg##_n(_container_type *container, int num) { \
+       return DWC_READ_REG32(&container->regs->_reg[num]); \
+} \
+static inline void dwc_write_##_reg##_n(_container_type *container, int num, uint32_t data) { \
+       DWC_DEBUG("WRITING %8s[%d]: %p: %08x", #_reg, num, \
+                 &(((uint32_t*)container->regs->_reg)[num]), data); \
+       DWC_WRITE_REG32(&(((uint32_t*)container->regs->_reg)[num]), data); \
+}
+
+#define dwc_define_read_write_reg(_reg,_container_type) \
+static inline uint32_t dwc_read_##_reg(_container_type *container) { \
+       return DWC_READ_REG32(&container->regs->_reg); \
+} \
+static inline void dwc_write_##_reg(_container_type *container, uint32_t data) { \
+       DWC_DEBUG("WRITING %11s: %p: %08x", #_reg, &container->regs->_reg, data); \
+       DWC_WRITE_REG32(&container->regs->_reg, data); \
+}
+
+# else /* DWC_DEBUG_REGS */
+
+#define dwc_define_read_write_reg_n(_reg,_container_type) \
+static inline uint32_t dwc_read_##_reg##_n(_container_type *container, int num) { \
+       return DWC_READ_REG32(&container->regs->_reg[num]); \
+} \
+static inline void dwc_write_##_reg##_n(_container_type *container, int num, uint32_t data) { \
+       DWC_WRITE_REG32(&(((uint32_t*)container->regs->_reg)[num]), data); \
+}
+
+#define dwc_define_read_write_reg(_reg,_container_type) \
+static inline uint32_t dwc_read_##_reg(_container_type *container) { \
+       return DWC_READ_REG32(&container->regs->_reg); \
+} \
+static inline void dwc_write_##_reg(_container_type *container, uint32_t data) { \
+       DWC_WRITE_REG32(&container->regs->_reg, data); \
+}
+
+# endif        /* DWC_DEBUG_REGS */
+
+#endif /* DWC_LINUX */
+
+#if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
+
+# ifdef DWC_DEBUG_REGS
+
+#define dwc_define_read_write_reg_n(_reg,_container_type) \
+static inline uint32_t dwc_read_##_reg##_n(void *io_ctx, _container_type *container, int num) { \
+       return DWC_READ_REG32(io_ctx, &container->regs->_reg[num]); \
+} \
+static inline void dwc_write_##_reg##_n(void *io_ctx, _container_type *container, int num, uint32_t data) { \
+       DWC_DEBUG("WRITING %8s[%d]: %p: %08x", #_reg, num, \
+                 &(((uint32_t*)container->regs->_reg)[num]), data); \
+       DWC_WRITE_REG32(io_ctx, &(((uint32_t*)container->regs->_reg)[num]), data); \
+}
+
+#define dwc_define_read_write_reg(_reg,_container_type) \
+static inline uint32_t dwc_read_##_reg(void *io_ctx, _container_type *container) { \
+       return DWC_READ_REG32(io_ctx, &container->regs->_reg); \
+} \
+static inline void dwc_write_##_reg(void *io_ctx, _container_type *container, uint32_t data) { \
+       DWC_DEBUG("WRITING %11s: %p: %08x", #_reg, &container->regs->_reg, data); \
+       DWC_WRITE_REG32(io_ctx, &container->regs->_reg, data); \
+}
+
+# else /* DWC_DEBUG_REGS */
+
+#define dwc_define_read_write_reg_n(_reg,_container_type) \
+static inline uint32_t dwc_read_##_reg##_n(void *io_ctx, _container_type *container, int num) { \
+       return DWC_READ_REG32(io_ctx, &container->regs->_reg[num]); \
+} \
+static inline void dwc_write_##_reg##_n(void *io_ctx, _container_type *container, int num, uint32_t data) { \
+       DWC_WRITE_REG32(io_ctx, &(((uint32_t*)container->regs->_reg)[num]), data); \
+}
+
+#define dwc_define_read_write_reg(_reg,_container_type) \
+static inline uint32_t dwc_read_##_reg(void *io_ctx, _container_type *container) { \
+       return DWC_READ_REG32(io_ctx, &container->regs->_reg); \
+} \
+static inline void dwc_write_##_reg(void *io_ctx, _container_type *container, uint32_t data) { \
+       DWC_WRITE_REG32(io_ctx, &container->regs->_reg, data); \
+}
+
+# endif        /* DWC_DEBUG_REGS */
+
+#endif /* DWC_FREEBSD || DWC_NETBSD */
+
+/** @endcond */
+
+
+#ifdef DWC_CRYPTOLIB
+/** @name Crypto Functions
+ *
+ * These are the low-level cryptographic functions used by the driver. */
+
+/** Perform AES CBC */
+extern int DWC_AES_CBC(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t iv[16], uint8_t *out);
+#define dwc_aes_cbc DWC_AES_CBC
+
+/** Fill the provided buffer with random bytes.  These should be cryptographic grade random numbers. */
+extern void DWC_RANDOM_BYTES(uint8_t *buffer, uint32_t length);
+#define dwc_random_bytes DWC_RANDOM_BYTES
+
+/** Perform the SHA-256 hash function */
+extern int DWC_SHA256(uint8_t *message, uint32_t len, uint8_t *out);
+#define dwc_sha256 DWC_SHA256
+
+/** Calculated the HMAC-SHA256 */
+extern int DWC_HMAC_SHA256(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t *out);
+#define dwc_hmac_sha256 DWC_HMAC_SHA256
+
+#endif /* DWC_CRYPTOLIB */
+
+
+/** @name Memory Allocation
+ *
+ * These function provide access to memory allocation.  There are only 2 DMA
+ * functions and 3 Regular memory functions that need to be implemented.  None
+ * of the memory debugging routines need to be implemented.  The allocation
+ * routines all ZERO the contents of the memory.
+ *
+ * Defining DWC_DEBUG_MEMORY turns on memory debugging and statistic gathering.
+ * This checks for memory leaks, keeping track of alloc/free pairs.  It also
+ * keeps track of how much memory the driver is using at any given time. */
+
+#define DWC_PAGE_SIZE 4096
+#define DWC_PAGE_OFFSET(addr) (((uint32_t)addr) & 0xfff)
+#define DWC_PAGE_ALIGNED(addr) ((((uint32_t)addr) & 0xfff) == 0)
+
+#define DWC_INVALID_DMA_ADDR 0x0
+
+#ifdef DWC_LINUX
+/** Type for a DMA address */
+typedef dma_addr_t dwc_dma_t;
+#endif
+
+#if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
+typedef bus_addr_t dwc_dma_t;
+#endif
+
+#ifdef DWC_FREEBSD
+typedef struct dwc_dmactx {
+       struct device *dev;
+       bus_dma_tag_t dma_tag;
+       bus_dmamap_t dma_map;
+       bus_addr_t dma_paddr;
+       void *dma_vaddr;
+} dwc_dmactx_t;
+#endif
+
+#ifdef DWC_NETBSD
+typedef struct dwc_dmactx {
+       struct device *dev;
+       bus_dma_tag_t dma_tag;
+       bus_dmamap_t dma_map;
+       bus_dma_segment_t segs[1];
+       int nsegs;
+       bus_addr_t dma_paddr;
+       void *dma_vaddr;
+} dwc_dmactx_t;
+#endif
+
+/* @todo these functions will be added in the future */
+#if 0
+/**
+ * Creates a DMA pool from which you can allocate DMA buffers.  Buffers
+ * allocated from this pool will be guaranteed to meet the size, alignment, and
+ * boundary requirements specified.
+ *
+ * @param[in] size Specifies the size of the buffers that will be allocated from
+ * this pool.
+ * @param[in] align Specifies the byte alignment requirements of the buffers
+ * allocated from this pool.  Must be a power of 2.
+ * @param[in] boundary Specifies the N-byte boundary that buffers allocated from
+ * this pool must not cross.
+ *
+ * @returns A pointer to an internal opaque structure which is not to be
+ * accessed outside of these library functions.  Use this handle to specify
+ * which pools to allocate/free DMA buffers from and also to destroy the pool,
+ * when you are done with it.
+ */
+extern dwc_pool_t *DWC_DMA_POOL_CREATE(uint32_t size, uint32_t align, uint32_t boundary);
+
+/**
+ * Destroy a DMA pool.  All buffers allocated from that pool must be freed first.
+ */
+extern void DWC_DMA_POOL_DESTROY(dwc_pool_t *pool);
+
+/**
+ * Allocate a buffer from the specified DMA pool and zeros its contents.
+ */
+extern void *DWC_DMA_POOL_ALLOC(dwc_pool_t *pool, uint64_t *dma_addr);
+
+/**
+ * Free a previously allocated buffer from the DMA pool.
+ */
+extern void DWC_DMA_POOL_FREE(dwc_pool_t *pool, void *vaddr, void *daddr);
+#endif
+
+/** Allocates a DMA capable buffer and zeroes its contents. */
+extern void *__DWC_DMA_ALLOC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr);
+
+/** Allocates a DMA capable buffer and zeroes its contents in atomic contest */
+extern void *__DWC_DMA_ALLOC_ATOMIC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr);
+
+/** Frees a previously allocated buffer. */
+extern void __DWC_DMA_FREE(void *dma_ctx, uint32_t size, void *virt_addr, dwc_dma_t dma_addr);
+
+/** Allocates a block of memory and zeroes its contents. */
+extern void *__DWC_ALLOC(void *mem_ctx, uint32_t size);
+
+/** Allocates a block of memory and zeroes its contents, in an atomic manner
+ * which can be used inside interrupt context.  The size should be sufficiently
+ * small, a few KB at most, such that failures are not likely to occur.  Can just call
+ * __DWC_ALLOC if it is atomic. */
+extern void *__DWC_ALLOC_ATOMIC(void *mem_ctx, uint32_t size);
+
+/** Frees a previously allocated buffer. */
+extern void __DWC_FREE(void *mem_ctx, void *addr);
+
+#ifndef DWC_DEBUG_MEMORY
+
+#define DWC_ALLOC(_size_) __DWC_ALLOC(NULL, _size_)
+#define DWC_ALLOC_ATOMIC(_size_) __DWC_ALLOC_ATOMIC(NULL, _size_)
+#define DWC_FREE(_addr_) __DWC_FREE(NULL, _addr_)
+
+# ifdef DWC_LINUX
+#define DWC_DMA_ALLOC(_dev, _size_, _dma_) __DWC_DMA_ALLOC(_dev, _size_, _dma_)
+#define DWC_DMA_ALLOC_ATOMIC(_dev, _size_, _dma_) __DWC_DMA_ALLOC_ATOMIC(_dev, _size_, _dma_)
+#define DWC_DMA_FREE(_dev, _size_,_virt_, _dma_) __DWC_DMA_FREE(_dev, _size_, _virt_, _dma_)
+# endif
+
+# if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
+#define DWC_DMA_ALLOC __DWC_DMA_ALLOC
+#define DWC_DMA_FREE __DWC_DMA_FREE
+# endif
+extern void *dwc_dma_alloc_atomic_debug(uint32_t size, dwc_dma_t *dma_addr, char const *func, int line);
+
+#else  /* DWC_DEBUG_MEMORY */
+
+extern void *dwc_alloc_debug(void *mem_ctx, uint32_t size, char const *func, int line);
+extern void *dwc_alloc_atomic_debug(void *mem_ctx, uint32_t size, char const *func, int line);
+extern void dwc_free_debug(void *mem_ctx, void *addr, char const *func, int line);
+extern void *dwc_dma_alloc_debug(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr,
+                                char const *func, int line);
+extern void *dwc_dma_alloc_atomic_debug(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr,
+                               char const *func, int line);
+extern void dwc_dma_free_debug(void *dma_ctx, uint32_t size, void *virt_addr,
+                              dwc_dma_t dma_addr, char const *func, int line);
+
+extern int dwc_memory_debug_start(void *mem_ctx);
+extern void dwc_memory_debug_stop(void);
+extern void dwc_memory_debug_report(void);
+
+#define DWC_ALLOC(_size_) dwc_alloc_debug(NULL, _size_, __func__, __LINE__)
+#define DWC_ALLOC_ATOMIC(_size_) dwc_alloc_atomic_debug(NULL, _size_, \
+                                                       __func__, __LINE__)
+#define DWC_FREE(_addr_) dwc_free_debug(NULL, _addr_, __func__, __LINE__)
+
+# ifdef DWC_LINUX
+#define DWC_DMA_ALLOC(_dev, _size_, _dma_) \
+       dwc_dma_alloc_debug(_dev, _size_, _dma_, __func__, __LINE__)
+#define DWC_DMA_ALLOC_ATOMIC(_dev, _size_, _dma_) \
+       dwc_dma_alloc_atomic_debug(_dev, _size_, _dma_, __func__, __LINE__)
+#define DWC_DMA_FREE(_dev, _size_, _virt_, _dma_) \
+       dwc_dma_free_debug(_dev, _size_, _virt_, _dma_, __func__, __LINE__)
+# endif
+
+# if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
+#define DWC_DMA_ALLOC(_ctx_,_size_,_dma_) dwc_dma_alloc_debug(_ctx_, _size_, \
+                                               _dma_, __func__, __LINE__)
+#define DWC_DMA_FREE(_ctx_,_size_,_virt_,_dma_) dwc_dma_free_debug(_ctx_, _size_, \
+                                                _virt_, _dma_, __func__, __LINE__)
+# endif
+
+#endif /* DWC_DEBUG_MEMORY */
+
+#define dwc_alloc(_ctx_,_size_) DWC_ALLOC(_size_)
+#define dwc_alloc_atomic(_ctx_,_size_) DWC_ALLOC_ATOMIC(_size_)
+#define dwc_free(_ctx_,_addr_) DWC_FREE(_addr_)
+
+#ifdef DWC_LINUX
+/* Linux doesn't need any extra parameters for DMA buffer allocation, so we
+ * just throw away the DMA context parameter.
+ */
+#define dwc_dma_alloc(_ctx_,_size_,_dma_) DWC_DMA_ALLOC(_size_, _dma_)
+#define dwc_dma_alloc_atomic(_ctx_,_size_,_dma_) DWC_DMA_ALLOC_ATOMIC(_size_, _dma_)
+#define dwc_dma_free(_ctx_,_size_,_virt_,_dma_) DWC_DMA_FREE(_size_, _virt_, _dma_)
+#endif
+
+#if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
+/** BSD needs several extra parameters for DMA buffer allocation, so we pass
+ * them in using the DMA context parameter.
+ */
+#define dwc_dma_alloc DWC_DMA_ALLOC
+#define dwc_dma_free DWC_DMA_FREE
+#endif
+
+
+/** @name Memory and String Processing */
+
+/** memset() clone */
+extern void *DWC_MEMSET(void *dest, uint8_t byte, uint32_t size);
+#define dwc_memset DWC_MEMSET
+
+/** memcpy() clone */
+extern void *DWC_MEMCPY(void *dest, void const *src, uint32_t size);
+#define dwc_memcpy DWC_MEMCPY
+
+/** memmove() clone */
+extern void *DWC_MEMMOVE(void *dest, void *src, uint32_t size);
+#define dwc_memmove DWC_MEMMOVE
+
+/** memcmp() clone */
+extern int DWC_MEMCMP(void *m1, void *m2, uint32_t size);
+#define dwc_memcmp DWC_MEMCMP
+
+/** strcmp() clone */
+extern int DWC_STRCMP(void *s1, void *s2);
+#define dwc_strcmp DWC_STRCMP
+
+/** strncmp() clone */
+extern int DWC_STRNCMP(void *s1, void *s2, uint32_t size);
+#define dwc_strncmp DWC_STRNCMP
+
+/** strlen() clone, for NULL terminated ASCII strings */
+extern int DWC_STRLEN(char const *str);
+#define dwc_strlen DWC_STRLEN
+
+/** strcpy() clone, for NULL terminated ASCII strings */
+extern char *DWC_STRCPY(char *to, const char *from);
+#define dwc_strcpy DWC_STRCPY
+
+/** strdup() clone.  If you wish to use memory allocation debugging, this
+ * implementation of strdup should use the DWC_* memory routines instead of
+ * calling a predefined strdup.  Otherwise the memory allocated by this routine
+ * will not be seen by the debugging routines. */
+extern char *DWC_STRDUP(char const *str);
+#define dwc_strdup(_ctx_,_str_) DWC_STRDUP(_str_)
+
+/** NOT an atoi() clone.  Read the description carefully.  Returns an integer
+ * converted from the string str in base 10 unless the string begins with a "0x"
+ * in which case it is base 16.  String must be a NULL terminated sequence of
+ * ASCII characters and may optionally begin with whitespace, a + or -, and a
+ * "0x" prefix if base 16.  The remaining characters must be valid digits for
+ * the number and end with a NULL character.  If any invalid characters are
+ * encountered or it returns with a negative error code and the results of the
+ * conversion are undefined.  On sucess it returns 0.  Overflow conditions are
+ * undefined.  An example implementation using atoi() can be referenced from the
+ * Linux implementation. */
+extern int DWC_ATOI(const char *str, int32_t *value);
+#define dwc_atoi DWC_ATOI
+
+/** Same as above but for unsigned. */
+extern int DWC_ATOUI(const char *str, uint32_t *value);
+#define dwc_atoui DWC_ATOUI
+
+#ifdef DWC_UTFLIB
+/** This routine returns a UTF16LE unicode encoded string from a UTF8 string. */
+extern int DWC_UTF8_TO_UTF16LE(uint8_t const *utf8string, uint16_t *utf16string, unsigned len);
+#define dwc_utf8_to_utf16le DWC_UTF8_TO_UTF16LE
+#endif
+
+
+/** @name Wait queues
+ *
+ * Wait queues provide a means of synchronizing between threads or processes.  A
+ * process can block on a waitq if some condition is not true, waiting for it to
+ * become true.  When the waitq is triggered all waiting process will get
+ * unblocked and the condition will be check again.  Waitqs should be triggered
+ * every time a condition can potentially change.*/
+struct dwc_waitq;
+
+/** Type for a waitq */
+typedef struct dwc_waitq dwc_waitq_t;
+
+/** The type of waitq condition callback function.  This is called every time
+ * condition is evaluated. */
+typedef int (*dwc_waitq_condition_t)(void *data);
+
+/** Allocate a waitq */
+extern dwc_waitq_t *DWC_WAITQ_ALLOC(void);
+#define dwc_waitq_alloc(_ctx_) DWC_WAITQ_ALLOC()
+
+/** Free a waitq */
+extern void DWC_WAITQ_FREE(dwc_waitq_t *wq);
+#define dwc_waitq_free DWC_WAITQ_FREE
+
+/** Check the condition and if it is false, block on the waitq.  When unblocked, check the
+ * condition again.  The function returns when the condition becomes true.  The return value
+ * is 0 on condition true, DWC_WAITQ_ABORTED on abort or killed, or DWC_WAITQ_UNKNOWN on error. */
+extern int32_t DWC_WAITQ_WAIT(dwc_waitq_t *wq, dwc_waitq_condition_t cond, void *data);
+#define dwc_waitq_wait DWC_WAITQ_WAIT
+
+/** Check the condition and if it is false, block on the waitq.  When unblocked,
+ * check the condition again.  The function returns when the condition become
+ * true or the timeout has passed.  The return value is 0 on condition true or
+ * DWC_TIMED_OUT on timeout, or DWC_WAITQ_ABORTED, or DWC_WAITQ_UNKNOWN on
+ * error. */
+extern int32_t DWC_WAITQ_WAIT_TIMEOUT(dwc_waitq_t *wq, dwc_waitq_condition_t cond,
+                                     void *data, int32_t msecs);
+#define dwc_waitq_wait_timeout DWC_WAITQ_WAIT_TIMEOUT
+
+/** Trigger a waitq, unblocking all processes.  This should be called whenever a condition
+ * has potentially changed. */
+extern void DWC_WAITQ_TRIGGER(dwc_waitq_t *wq);
+#define dwc_waitq_trigger DWC_WAITQ_TRIGGER
+
+/** Unblock all processes waiting on the waitq with an ABORTED result. */
+extern void DWC_WAITQ_ABORT(dwc_waitq_t *wq);
+#define dwc_waitq_abort DWC_WAITQ_ABORT
+
+
+/** @name Threads
+ *
+ * A thread must be explicitly stopped.  It must check DWC_THREAD_SHOULD_STOP
+ * whenever it is woken up, and then return.  The DWC_THREAD_STOP function
+ * returns the value from the thread.
+ */
+
+struct dwc_thread;
+
+/** Type for a thread */
+typedef struct dwc_thread dwc_thread_t;
+
+/** The thread function */
+typedef int (*dwc_thread_function_t)(void *data);
+
+/** Create a thread and start it running the thread_function.  Returns a handle
+ * to the thread */
+extern dwc_thread_t *DWC_THREAD_RUN(dwc_thread_function_t func, char *name, void *data);
+#define dwc_thread_run(_ctx_,_func_,_name_,_data_) DWC_THREAD_RUN(_func_, _name_, _data_)
+
+/** Stops a thread.  Return the value returned by the thread.  Or will return
+ * DWC_ABORT if the thread never started. */
+extern int DWC_THREAD_STOP(dwc_thread_t *thread);
+#define dwc_thread_stop DWC_THREAD_STOP
+
+/** Signifies to the thread that it must stop. */
+#ifdef DWC_LINUX
+/* Linux doesn't need any parameters for kthread_should_stop() */
+extern dwc_bool_t DWC_THREAD_SHOULD_STOP(void);
+#define dwc_thread_should_stop(_thrd_) DWC_THREAD_SHOULD_STOP()
+
+/* No thread_exit function in Linux */
+#define dwc_thread_exit(_thrd_)
+#endif
+
+#if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
+/** BSD needs the thread pointer for kthread_suspend_check() */
+extern dwc_bool_t DWC_THREAD_SHOULD_STOP(dwc_thread_t *thread);
+#define dwc_thread_should_stop DWC_THREAD_SHOULD_STOP
+
+/** The thread must call this to exit. */
+extern void DWC_THREAD_EXIT(dwc_thread_t *thread);
+#define dwc_thread_exit DWC_THREAD_EXIT
+#endif
+
+
+/** @name Work queues
+ *
+ * Workqs are used to queue a callback function to be called at some later time,
+ * in another thread. */
+struct dwc_workq;
+
+/** Type for a workq */
+typedef struct dwc_workq dwc_workq_t;
+
+/** The type of the callback function to be called. */
+typedef void (*dwc_work_callback_t)(void *data);
+
+/** Allocate a workq */
+extern dwc_workq_t *DWC_WORKQ_ALLOC(char *name);
+#define dwc_workq_alloc(_ctx_,_name_) DWC_WORKQ_ALLOC(_name_)
+
+/** Free a workq.  All work must be completed before being freed. */
+extern void DWC_WORKQ_FREE(dwc_workq_t *workq);
+#define dwc_workq_free DWC_WORKQ_FREE
+
+/** Schedule a callback on the workq, passing in data.  The function will be
+ * scheduled at some later time. */
+extern void DWC_WORKQ_SCHEDULE(dwc_workq_t *workq, dwc_work_callback_t cb,
+                              void *data, char *format, ...)
+#ifdef __GNUC__
+       __attribute__ ((format(printf, 4, 5)));
+#else
+       ;
+#endif
+#define dwc_workq_schedule DWC_WORKQ_SCHEDULE
+
+/** Schedule a callback on the workq, that will be called until at least
+ * given number miliseconds have passed. */
+extern void DWC_WORKQ_SCHEDULE_DELAYED(dwc_workq_t *workq, dwc_work_callback_t cb,
+                                      void *data, uint32_t time, char *format, ...)
+#ifdef __GNUC__
+       __attribute__ ((format(printf, 5, 6)));
+#else
+       ;
+#endif
+#define dwc_workq_schedule_delayed DWC_WORKQ_SCHEDULE_DELAYED
+
+/** The number of processes in the workq */
+extern int DWC_WORKQ_PENDING(dwc_workq_t *workq);
+#define dwc_workq_pending DWC_WORKQ_PENDING
+
+/** Blocks until all the work in the workq is complete or timed out.  Returns <
+ * 0 on timeout. */
+extern int DWC_WORKQ_WAIT_WORK_DONE(dwc_workq_t *workq, int timeout);
+#define dwc_workq_wait_work_done DWC_WORKQ_WAIT_WORK_DONE
+
+
+/** @name Tasklets
+ *
+ */
+struct dwc_tasklet;
+
+/** Type for a tasklet */
+typedef struct dwc_tasklet dwc_tasklet_t;
+
+/** The type of the callback function to be called */
+typedef void (*dwc_tasklet_callback_t)(void *data);
+
+/** Allocates a tasklet */
+extern dwc_tasklet_t *DWC_TASK_ALLOC(char *name, dwc_tasklet_callback_t cb, void *data);
+#define dwc_task_alloc(_ctx_,_name_,_cb_,_data_) DWC_TASK_ALLOC(_name_, _cb_, _data_)
+
+/** Frees a tasklet */
+extern void DWC_TASK_FREE(dwc_tasklet_t *task);
+#define dwc_task_free DWC_TASK_FREE
+
+/** Schedules a tasklet to run */
+extern void DWC_TASK_SCHEDULE(dwc_tasklet_t *task);
+#define dwc_task_schedule DWC_TASK_SCHEDULE
+
+extern void DWC_TASK_HI_SCHEDULE(dwc_tasklet_t *task);
+#define dwc_task_hi_schedule DWC_TASK_HI_SCHEDULE
+
+/** @name Timer
+ *
+ * Callbacks must be small and atomic.
+ */
+struct dwc_timer;
+
+/** Type for a timer */
+typedef struct dwc_timer dwc_timer_t;
+
+/** The type of the callback function to be called */
+typedef void (*dwc_timer_callback_t)(void *data);
+
+/** Allocates a timer */
+extern dwc_timer_t *DWC_TIMER_ALLOC(char *name, dwc_timer_callback_t cb, void *data);
+#define dwc_timer_alloc(_ctx_,_name_,_cb_,_data_) DWC_TIMER_ALLOC(_name_,_cb_,_data_)
+
+/** Frees a timer */
+extern void DWC_TIMER_FREE(dwc_timer_t *timer);
+#define dwc_timer_free DWC_TIMER_FREE
+
+/** Schedules the timer to run at time ms from now.  And will repeat at every
+ * repeat_interval msec therafter
+ *
+ * Modifies a timer that is still awaiting execution to a new expiration time.
+ * The mod_time is added to the old time.  */
+extern void DWC_TIMER_SCHEDULE(dwc_timer_t *timer, uint32_t time);
+#define dwc_timer_schedule DWC_TIMER_SCHEDULE
+
+/** Disables the timer from execution. */
+extern void DWC_TIMER_CANCEL(dwc_timer_t *timer);
+#define dwc_timer_cancel DWC_TIMER_CANCEL
+
+
+/** @name Spinlocks
+ *
+ * These locks are used when the work between the lock/unlock is atomic and
+ * short.  Interrupts are also disabled during the lock/unlock and thus they are
+ * suitable to lock between interrupt/non-interrupt context.  They also lock
+ * between processes if you have multiple CPUs or Preemption.  If you don't have
+ * multiple CPUS or Preemption, then the you can simply implement the
+ * DWC_SPINLOCK and DWC_SPINUNLOCK to disable and enable interrupts.  Because
+ * the work between the lock/unlock is atomic, the process context will never
+ * change, and so you never have to lock between processes.  */
+
+struct dwc_spinlock;
+
+/** Type for a spinlock */
+typedef struct dwc_spinlock dwc_spinlock_t;
+
+/** Type for the 'flags' argument to spinlock funtions */
+typedef unsigned long dwc_irqflags_t;
+
+/** Returns an initialized lock variable.  This function should allocate and
+ * initialize the OS-specific data structure used for locking.  This data
+ * structure is to be used for the DWC_LOCK and DWC_UNLOCK functions and should
+ * be freed by the DWC_FREE_LOCK when it is no longer used.
+ *
+ * For Linux Spinlock Debugging make it macro because the debugging routines use
+ * the symbol name to determine recursive locking. Using a wrapper function
+ * makes it falsely think recursive locking occurs. */
+#if defined(DWC_LINUX) && defined(CONFIG_DEBUG_SPINLOCK)
+#define DWC_SPINLOCK_ALLOC_LINUX_DEBUG(lock) ({ \
+       lock = DWC_ALLOC(sizeof(spinlock_t)); \
+       if (lock) { \
+               spin_lock_init((spinlock_t *)lock); \
+       } \
+})
+#else
+extern dwc_spinlock_t *DWC_SPINLOCK_ALLOC(void);
+#define dwc_spinlock_alloc(_ctx_) DWC_SPINLOCK_ALLOC()
+#endif
+
+/** Frees an initialized lock variable. */
+extern void DWC_SPINLOCK_FREE(dwc_spinlock_t *lock);
+#define dwc_spinlock_free(_ctx_,_lock_) DWC_SPINLOCK_FREE(_lock_)
+
+/** Disables interrupts and blocks until it acquires the lock.
+ *
+ * @param lock Pointer to the spinlock.
+ * @param flags Unsigned long for irq flags storage.
+ */
+extern void DWC_SPINLOCK_IRQSAVE(dwc_spinlock_t *lock, dwc_irqflags_t *flags);
+#define dwc_spinlock_irqsave DWC_SPINLOCK_IRQSAVE
+
+/** Re-enables the interrupt and releases the lock.
+ *
+ * @param lock Pointer to the spinlock.
+ * @param flags Unsigned long for irq flags storage.  Must be the same as was
+ * passed into DWC_LOCK.
+ */
+extern void DWC_SPINUNLOCK_IRQRESTORE(dwc_spinlock_t *lock, dwc_irqflags_t flags);
+#define dwc_spinunlock_irqrestore DWC_SPINUNLOCK_IRQRESTORE
+
+/** Blocks until it acquires the lock.
+ *
+ * @param lock Pointer to the spinlock.
+ */
+extern void DWC_SPINLOCK(dwc_spinlock_t *lock);
+#define dwc_spinlock DWC_SPINLOCK
+
+/** Releases the lock.
+ *
+ * @param lock Pointer to the spinlock.
+ */
+extern void DWC_SPINUNLOCK(dwc_spinlock_t *lock);
+#define dwc_spinunlock DWC_SPINUNLOCK
+
+
+/** @name Mutexes
+ *
+ * Unlike spinlocks Mutexes lock only between processes and the work between the
+ * lock/unlock CAN block, therefore it CANNOT be called from interrupt context.
+ */
+
+struct dwc_mutex;
+
+/** Type for a mutex */
+typedef struct dwc_mutex dwc_mutex_t;
+
+/* For Linux Mutex Debugging make it inline because the debugging routines use
+ * the symbol to determine recursive locking.  This makes it falsely think
+ * recursive locking occurs. */
+#if defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES)
+#define DWC_MUTEX_ALLOC_LINUX_DEBUG(__mutexp) ({ \
+       __mutexp = (dwc_mutex_t *)DWC_ALLOC(sizeof(struct mutex)); \
+       mutex_init((struct mutex *)__mutexp); \
+})
+#endif
+
+/** Allocate a mutex */
+extern dwc_mutex_t *DWC_MUTEX_ALLOC(void);
+#define dwc_mutex_alloc(_ctx_) DWC_MUTEX_ALLOC()
+
+/* For memory leak debugging when using Linux Mutex Debugging */
+#if defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES)
+#define DWC_MUTEX_FREE(__mutexp) do { \
+       mutex_destroy((struct mutex *)__mutexp); \
+       DWC_FREE(__mutexp); \
+} while(0)
+#else
+/** Free a mutex */
+extern void DWC_MUTEX_FREE(dwc_mutex_t *mutex);
+#define dwc_mutex_free(_ctx_,_mutex_) DWC_MUTEX_FREE(_mutex_)
+#endif
+
+/** Lock a mutex */
+extern void DWC_MUTEX_LOCK(dwc_mutex_t *mutex);
+#define dwc_mutex_lock DWC_MUTEX_LOCK
+
+/** Non-blocking lock returns 1 on successful lock. */
+extern int DWC_MUTEX_TRYLOCK(dwc_mutex_t *mutex);
+#define dwc_mutex_trylock DWC_MUTEX_TRYLOCK
+
+/** Unlock a mutex */
+extern void DWC_MUTEX_UNLOCK(dwc_mutex_t *mutex);
+#define dwc_mutex_unlock DWC_MUTEX_UNLOCK
+
+
+/** @name Time */
+
+/** Microsecond delay.
+ *
+ * @param usecs  Microseconds to delay.
+ */
+extern void DWC_UDELAY(uint32_t usecs);
+#define dwc_udelay DWC_UDELAY
+
+/** Millisecond delay.
+ *
+ * @param msecs  Milliseconds to delay.
+ */
+extern void DWC_MDELAY(uint32_t msecs);
+#define dwc_mdelay DWC_MDELAY
+
+/** Non-busy waiting.
+ * Sleeps for specified number of milliseconds.
+ *
+ * @param msecs Milliseconds to sleep.
+ */
+extern void DWC_MSLEEP(uint32_t msecs);
+#define dwc_msleep DWC_MSLEEP
+
+/**
+ * Returns number of milliseconds since boot.
+ */
+extern uint32_t DWC_TIME(void);
+#define dwc_time DWC_TIME
+
+
+
+
+/* @mainpage DWC Portability and Common Library
+ *
+ * This is the documentation for the DWC Portability and Common Library.
+ *
+ * @section intro Introduction
+ *
+ * The DWC Portability library consists of wrapper calls and data structures to
+ * all low-level functions which are typically provided by the OS.  The WUDEV
+ * driver uses only these functions.  In order to port the WUDEV driver, only
+ * the functions in this library need to be re-implemented, with the same
+ * behavior as documented here.
+ *
+ * The Common library consists of higher level functions, which rely only on
+ * calling the functions from the DWC Portability library.  These common
+ * routines are shared across modules.  Some of the common libraries need to be
+ * used directly by the driver programmer when porting WUDEV.  Such as the
+ * parameter and notification libraries.
+ *
+ * @section low Portability Library OS Wrapper Functions
+ *
+ * Any function starting with DWC and in all CAPS is a low-level OS-wrapper that
+ * needs to be implemented when porting, for example DWC_MUTEX_ALLOC().  All of
+ * these functions are included in the dwc_os.h file.
+ *
+ * There are many functions here covering a wide array of OS services.  Please
+ * see dwc_os.h for details, and implementation notes for each function.
+ *
+ * @section common Common Library Functions
+ *
+ * Any function starting with dwc and in all lowercase is a common library
+ * routine.  These functions have a portable implementation and do not need to
+ * be reimplemented when porting.  The common routines can be used by any
+ * driver, and some must be used by the end user to control the drivers.  For
+ * example, you must use the Parameter common library in order to set the
+ * parameters in the WUDEV module.
+ *
+ * The common libraries consist of the following:
+ *
+ * - Connection Contexts - Used internally and can be used by end-user.  See dwc_cc.h
+ * - Parameters - Used internally and can be used by end-user.  See dwc_params.h
+ * - Notifications - Used internally and can be used by end-user.  See dwc_notifier.h
+ * - Lists - Used internally and can be used by end-user.  See dwc_list.h
+ * - Memory Debugging - Used internally and can be used by end-user.  See dwc_os.h
+ * - Modpow - Used internally only.  See dwc_modpow.h
+ * - DH - Used internally only.  See dwc_dh.h
+ * - Crypto - Used internally only.  See dwc_crypto.h
+ *
+ *
+ * @section prereq Prerequistes For dwc_os.h
+ * @subsection types Data Types
+ *
+ * The dwc_os.h file assumes that several low-level data types are pre defined for the
+ * compilation environment.  These data types are:
+ *
+ * - uint8_t - unsigned 8-bit data type
+ * - int8_t - signed 8-bit data type
+ * - uint16_t - unsigned 16-bit data type
+ * - int16_t - signed 16-bit data type
+ * - uint32_t - unsigned 32-bit data type
+ * - int32_t - signed 32-bit data type
+ * - uint64_t - unsigned 64-bit data type
+ * - int64_t - signed 64-bit data type
+ *
+ * Ensure that these are defined before using dwc_os.h.  The easiest way to do
+ * that is to modify the top of the file to include the appropriate header.
+ * This is already done for the Linux environment.  If the DWC_LINUX macro is
+ * defined, the correct header will be added.  A standard header <stdint.h> is
+ * also used for environments where standard C headers are available.
+ *
+ * @subsection stdarg Variable Arguments
+ *
+ * Variable arguments are provided by a standard C header <stdarg.h>.  it is
+ * available in Both the Linux and ANSI C enviornment.  An equivalent must be
+ * provided in your enviornment in order to use dwc_os.h with the debug and
+ * tracing message functionality.
+ *
+ * @subsection thread Threading
+ *
+ * WUDEV Core must be run on an operating system that provides for multiple
+ * threads/processes.  Threading can be implemented in many ways, even in
+ * embedded systems without an operating system.  At the bare minimum, the
+ * system should be able to start any number of processes at any time to handle
+ * special work.  It need not be a pre-emptive system.  Process context can
+ * change upon a call to a blocking function.  The hardware interrupt context
+ * that calls the module's ISR() function must be differentiable from process
+ * context, even if your processes are impemented via a hardware interrupt.
+ * Further locking mechanism between process must exist (or be implemented), and
+ * process context must have a way to disable interrupts for a period of time to
+ * lock them out.  If all of this exists, the functions in dwc_os.h related to
+ * threading should be able to be implemented with the defined behavior.
+ *
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _DWC_OS_H_ */
--- /dev/null
+++ b/drivers/usb/host/dwc_common_port/usb.h
@@ -0,0 +1,946 @@
+/*
+ * Copyright (c) 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Lennart Augustsson (lennart@augustsson.net) at
+ * Carlstedt Research & Technology.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* Modified by Synopsys, Inc, 12/12/2007 */
+
+
+#ifndef _USB_H_
+#define _USB_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * The USB records contain some unaligned little-endian word
+ * components.  The U[SG]ETW macros take care of both the alignment
+ * and endian problem and should always be used to access non-byte
+ * values.
+ */
+typedef u_int8_t uByte;
+typedef u_int8_t uWord[2];
+typedef u_int8_t uDWord[4];
+
+#define USETW2(w,h,l) ((w)[0] = (u_int8_t)(l), (w)[1] = (u_int8_t)(h))
+#define UCONSTW(x)     { (x) & 0xff, ((x) >> 8) & 0xff }
+#define UCONSTDW(x)    { (x) & 0xff, ((x) >> 8) & 0xff, \
+                         ((x) >> 16) & 0xff, ((x) >> 24) & 0xff }
+
+#if 1
+#define UGETW(w) ((w)[0] | ((w)[1] << 8))
+#define USETW(w,v) ((w)[0] = (u_int8_t)(v), (w)[1] = (u_int8_t)((v) >> 8))
+#define UGETDW(w) ((w)[0] | ((w)[1] << 8) | ((w)[2] << 16) | ((w)[3] << 24))
+#define USETDW(w,v) ((w)[0] = (u_int8_t)(v), \
+                    (w)[1] = (u_int8_t)((v) >> 8), \
+                    (w)[2] = (u_int8_t)((v) >> 16), \
+                    (w)[3] = (u_int8_t)((v) >> 24))
+#else
+/*
+ * On little-endian machines that can handle unanliged accesses
+ * (e.g. i386) these macros can be replaced by the following.
+ */
+#define UGETW(w) (*(u_int16_t *)(w))
+#define USETW(w,v) (*(u_int16_t *)(w) = (v))
+#define UGETDW(w) (*(u_int32_t *)(w))
+#define USETDW(w,v) (*(u_int32_t *)(w) = (v))
+#endif
+
+/*
+ * Macros for accessing UAS IU fields, which are big-endian
+ */
+#define IUSETW2(w,h,l) ((w)[0] = (u_int8_t)(h), (w)[1] = (u_int8_t)(l))
+#define IUCONSTW(x)    { ((x) >> 8) & 0xff, (x) & 0xff }
+#define IUCONSTDW(x)   { ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
+                       ((x) >> 8) & 0xff, (x) & 0xff }
+#define IUGETW(w) (((w)[0] << 8) | (w)[1])
+#define IUSETW(w,v) ((w)[0] = (u_int8_t)((v) >> 8), (w)[1] = (u_int8_t)(v))
+#define IUGETDW(w) (((w)[0] << 24) | ((w)[1] << 16) | ((w)[2] << 8) | (w)[3])
+#define IUSETDW(w,v) ((w)[0] = (u_int8_t)((v) >> 24), \
+                     (w)[1] = (u_int8_t)((v) >> 16), \
+                     (w)[2] = (u_int8_t)((v) >> 8), \
+                     (w)[3] = (u_int8_t)(v))
+
+#define UPACKED __attribute__((__packed__))
+
+typedef struct {
+       uByte           bmRequestType;
+       uByte           bRequest;
+       uWord           wValue;
+       uWord           wIndex;
+       uWord           wLength;
+} UPACKED usb_device_request_t;
+
+#define UT_GET_DIR(a) ((a) & 0x80)
+#define UT_WRITE               0x00
+#define UT_READ                        0x80
+
+#define UT_GET_TYPE(a) ((a) & 0x60)
+#define UT_STANDARD            0x00
+#define UT_CLASS               0x20
+#define UT_VENDOR              0x40
+
+#define UT_GET_RECIPIENT(a) ((a) & 0x1f)
+#define UT_DEVICE              0x00
+#define UT_INTERFACE           0x01
+#define UT_ENDPOINT            0x02
+#define UT_OTHER               0x03
+
+#define UT_READ_DEVICE         (UT_READ  | UT_STANDARD | UT_DEVICE)
+#define UT_READ_INTERFACE      (UT_READ  | UT_STANDARD | UT_INTERFACE)
+#define UT_READ_ENDPOINT       (UT_READ  | UT_STANDARD | UT_ENDPOINT)
+#define UT_WRITE_DEVICE                (UT_WRITE | UT_STANDARD | UT_DEVICE)
+#define UT_WRITE_INTERFACE     (UT_WRITE | UT_STANDARD | UT_INTERFACE)
+#define UT_WRITE_ENDPOINT      (UT_WRITE | UT_STANDARD | UT_ENDPOINT)
+#define UT_READ_CLASS_DEVICE   (UT_READ  | UT_CLASS | UT_DEVICE)
+#define UT_READ_CLASS_INTERFACE        (UT_READ  | UT_CLASS | UT_INTERFACE)
+#define UT_READ_CLASS_OTHER    (UT_READ  | UT_CLASS | UT_OTHER)
+#define UT_READ_CLASS_ENDPOINT (UT_READ  | UT_CLASS | UT_ENDPOINT)
+#define UT_WRITE_CLASS_DEVICE  (UT_WRITE | UT_CLASS | UT_DEVICE)
+#define UT_WRITE_CLASS_INTERFACE (UT_WRITE | UT_CLASS | UT_INTERFACE)
+#define UT_WRITE_CLASS_OTHER   (UT_WRITE | UT_CLASS | UT_OTHER)
+#define UT_WRITE_CLASS_ENDPOINT        (UT_WRITE | UT_CLASS | UT_ENDPOINT)
+#define UT_READ_VENDOR_DEVICE  (UT_READ  | UT_VENDOR | UT_DEVICE)
+#define UT_READ_VENDOR_INTERFACE (UT_READ  | UT_VENDOR | UT_INTERFACE)
+#define UT_READ_VENDOR_OTHER   (UT_READ  | UT_VENDOR | UT_OTHER)
+#define UT_READ_VENDOR_ENDPOINT        (UT_READ  | UT_VENDOR | UT_ENDPOINT)
+#define UT_WRITE_VENDOR_DEVICE (UT_WRITE | UT_VENDOR | UT_DEVICE)
+#define UT_WRITE_VENDOR_INTERFACE (UT_WRITE | UT_VENDOR | UT_INTERFACE)
+#define UT_WRITE_VENDOR_OTHER  (UT_WRITE | UT_VENDOR | UT_OTHER)
+#define UT_WRITE_VENDOR_ENDPOINT (UT_WRITE | UT_VENDOR | UT_ENDPOINT)
+
+/* Requests */
+#define UR_GET_STATUS          0x00
+#define  USTAT_STANDARD_STATUS  0x00
+#define  WUSTAT_WUSB_FEATURE    0x01
+#define  WUSTAT_CHANNEL_INFO    0x02
+#define  WUSTAT_RECEIVED_DATA   0x03
+#define  WUSTAT_MAS_AVAILABILITY 0x04
+#define  WUSTAT_CURRENT_TRANSMIT_POWER 0x05
+#define UR_CLEAR_FEATURE       0x01
+#define UR_SET_FEATURE         0x03
+#define UR_SET_AND_TEST_FEATURE 0x0c
+#define UR_SET_ADDRESS         0x05
+#define UR_GET_DESCRIPTOR      0x06
+#define  UDESC_DEVICE          0x01
+#define  UDESC_CONFIG          0x02
+#define  UDESC_STRING          0x03
+#define  UDESC_INTERFACE       0x04
+#define  UDESC_ENDPOINT                0x05
+#define  UDESC_SS_USB_COMPANION        0x30
+#define  UDESC_DEVICE_QUALIFIER        0x06
+#define  UDESC_OTHER_SPEED_CONFIGURATION 0x07
+#define  UDESC_INTERFACE_POWER 0x08
+#define  UDESC_OTG             0x09
+#define  WUDESC_SECURITY       0x0c
+#define  WUDESC_KEY            0x0d
+#define   WUD_GET_KEY_INDEX(_wValue_) ((_wValue_) & 0xf)
+#define   WUD_GET_KEY_TYPE(_wValue_) (((_wValue_) & 0x30) >> 4)
+#define    WUD_KEY_TYPE_ASSOC    0x01
+#define    WUD_KEY_TYPE_GTK      0x02
+#define   WUD_GET_KEY_ORIGIN(_wValue_) (((_wValue_) & 0x40) >> 6)
+#define    WUD_KEY_ORIGIN_HOST   0x00
+#define    WUD_KEY_ORIGIN_DEVICE 0x01
+#define  WUDESC_ENCRYPTION_TYPE        0x0e
+#define  WUDESC_BOS            0x0f
+#define  WUDESC_DEVICE_CAPABILITY 0x10
+#define  WUDESC_WIRELESS_ENDPOINT_COMPANION 0x11
+#define  UDESC_BOS             0x0f
+#define  UDESC_DEVICE_CAPABILITY 0x10
+#define  UDESC_CS_DEVICE       0x21    /* class specific */
+#define  UDESC_CS_CONFIG       0x22
+#define  UDESC_CS_STRING       0x23
+#define  UDESC_CS_INTERFACE    0x24
+#define  UDESC_CS_ENDPOINT     0x25
+#define  UDESC_HUB             0x29
+#define UR_SET_DESCRIPTOR      0x07
+#define UR_GET_CONFIG          0x08
+#define UR_SET_CONFIG          0x09
+#define UR_GET_INTERFACE       0x0a
+#define UR_SET_INTERFACE       0x0b
+#define UR_SYNCH_FRAME         0x0c
+#define WUR_SET_ENCRYPTION      0x0d
+#define WUR_GET_ENCRYPTION     0x0e
+#define WUR_SET_HANDSHAKE      0x0f
+#define WUR_GET_HANDSHAKE      0x10
+#define WUR_SET_CONNECTION     0x11
+#define WUR_SET_SECURITY_DATA  0x12
+#define WUR_GET_SECURITY_DATA  0x13
+#define WUR_SET_WUSB_DATA      0x14
+#define  WUDATA_DRPIE_INFO     0x01
+#define  WUDATA_TRANSMIT_DATA  0x02
+#define  WUDATA_TRANSMIT_PARAMS        0x03
+#define  WUDATA_RECEIVE_PARAMS 0x04
+#define  WUDATA_TRANSMIT_POWER 0x05
+#define WUR_LOOPBACK_DATA_WRITE        0x15
+#define WUR_LOOPBACK_DATA_READ 0x16
+#define WUR_SET_INTERFACE_DS   0x17
+
+/* Feature numbers */
+#define UF_ENDPOINT_HALT       0
+#define UF_DEVICE_REMOTE_WAKEUP        1
+#define UF_TEST_MODE           2
+#define UF_DEVICE_B_HNP_ENABLE 3
+#define UF_DEVICE_A_HNP_SUPPORT        4
+#define UF_DEVICE_A_ALT_HNP_SUPPORT 5
+#define WUF_WUSB               3
+#define  WUF_TX_DRPIE          0x0
+#define  WUF_DEV_XMIT_PACKET   0x1
+#define  WUF_COUNT_PACKETS     0x2
+#define  WUF_CAPTURE_PACKETS   0x3
+#define UF_FUNCTION_SUSPEND    0
+#define UF_U1_ENABLE           48
+#define UF_U2_ENABLE           49
+#define UF_LTM_ENABLE          50
+
+/* Class requests from the USB 2.0 hub spec, table 11-15 */
+#define UCR_CLEAR_HUB_FEATURE          (0x2000 | UR_CLEAR_FEATURE)
+#define UCR_CLEAR_PORT_FEATURE         (0x2300 | UR_CLEAR_FEATURE)
+#define UCR_GET_HUB_DESCRIPTOR         (0xa000 | UR_GET_DESCRIPTOR)
+#define UCR_GET_HUB_STATUS             (0xa000 | UR_GET_STATUS)
+#define UCR_GET_PORT_STATUS            (0xa300 | UR_GET_STATUS)
+#define UCR_SET_HUB_FEATURE            (0x2000 | UR_SET_FEATURE)
+#define UCR_SET_PORT_FEATURE           (0x2300 | UR_SET_FEATURE)
+#define UCR_SET_AND_TEST_PORT_FEATURE  (0xa300 | UR_SET_AND_TEST_FEATURE)
+
+#ifdef _MSC_VER
+#include <pshpack1.h>
+#endif
+
+typedef struct {
+       uByte           bLength;
+       uByte           bDescriptorType;
+       uByte           bDescriptorSubtype;
+} UPACKED usb_descriptor_t;
+
+typedef struct {
+       uByte           bLength;
+       uByte           bDescriptorType;
+} UPACKED usb_descriptor_header_t;
+
+typedef struct {
+       uByte           bLength;
+       uByte           bDescriptorType;
+       uWord           bcdUSB;
+#define UD_USB_2_0             0x0200
+#define UD_IS_USB2(d) (UGETW((d)->bcdUSB) >= UD_USB_2_0)
+       uByte           bDeviceClass;
+       uByte           bDeviceSubClass;
+       uByte           bDeviceProtocol;
+       uByte           bMaxPacketSize;
+       /* The fields below are not part of the initial descriptor. */
+       uWord           idVendor;
+       uWord           idProduct;
+       uWord           bcdDevice;
+       uByte           iManufacturer;
+       uByte           iProduct;
+       uByte           iSerialNumber;
+       uByte           bNumConfigurations;
+} UPACKED usb_device_descriptor_t;
+#define USB_DEVICE_DESCRIPTOR_SIZE 18
+
+typedef struct {
+       uByte           bLength;
+       uByte           bDescriptorType;
+       uWord           wTotalLength;
+       uByte           bNumInterface;
+       uByte           bConfigurationValue;
+       uByte           iConfiguration;
+#define UC_ATT_ONE             (1 << 7)        /* must be set */
+#define UC_ATT_SELFPOWER       (1 << 6)        /* self powered */
+#define UC_ATT_WAKEUP          (1 << 5)        /* can wakeup */
+#define UC_ATT_BATTERY         (1 << 4)        /* battery powered */
+       uByte           bmAttributes;
+#define UC_BUS_POWERED         0x80
+#define UC_SELF_POWERED                0x40
+#define UC_REMOTE_WAKEUP       0x20
+       uByte           bMaxPower; /* max current in 2 mA units */
+#define UC_POWER_FACTOR 2
+} UPACKED usb_config_descriptor_t;
+#define USB_CONFIG_DESCRIPTOR_SIZE 9
+
+typedef struct {
+       uByte           bLength;
+       uByte           bDescriptorType;
+       uByte           bInterfaceNumber;
+       uByte           bAlternateSetting;
+       uByte           bNumEndpoints;
+       uByte           bInterfaceClass;
+       uByte           bInterfaceSubClass;
+       uByte           bInterfaceProtocol;
+       uByte           iInterface;
+} UPACKED usb_interface_descriptor_t;
+#define USB_INTERFACE_DESCRIPTOR_SIZE 9
+
+typedef struct {
+       uByte           bLength;
+       uByte           bDescriptorType;
+       uByte           bEndpointAddress;
+#define UE_GET_DIR(a)  ((a) & 0x80)
+#define UE_SET_DIR(a,d)        ((a) | (((d)&1) << 7))
+#define UE_DIR_IN      0x80
+#define UE_DIR_OUT     0x00
+#define UE_ADDR                0x0f
+#define UE_GET_ADDR(a) ((a) & UE_ADDR)
+       uByte           bmAttributes;
+#define UE_XFERTYPE    0x03
+#define  UE_CONTROL    0x00
+#define  UE_ISOCHRONOUS        0x01
+#define  UE_BULK       0x02
+#define  UE_INTERRUPT  0x03
+#define UE_GET_XFERTYPE(a)     ((a) & UE_XFERTYPE)
+#define UE_ISO_TYPE    0x0c
+#define  UE_ISO_ASYNC  0x04
+#define  UE_ISO_ADAPT  0x08
+#define  UE_ISO_SYNC   0x0c
+#define UE_GET_ISO_TYPE(a)     ((a) & UE_ISO_TYPE)
+       uWord           wMaxPacketSize;
+       uByte           bInterval;
+} UPACKED usb_endpoint_descriptor_t;
+#define USB_ENDPOINT_DESCRIPTOR_SIZE 7
+
+typedef struct ss_endpoint_companion_descriptor {
+       uByte bLength;
+       uByte bDescriptorType;
+       uByte bMaxBurst;
+#define USSE_GET_MAX_STREAMS(a)                ((a) & 0x1f)
+#define USSE_SET_MAX_STREAMS(a, b)     ((a) | ((b) & 0x1f))
+#define USSE_GET_MAX_PACKET_NUM(a)     ((a) & 0x03)
+#define USSE_SET_MAX_PACKET_NUM(a, b)  ((a) | ((b) & 0x03))
+       uByte bmAttributes;
+       uWord wBytesPerInterval;
+} UPACKED ss_endpoint_companion_descriptor_t;
+#define USB_SS_ENDPOINT_COMPANION_DESCRIPTOR_SIZE 6
+
+typedef struct {
+       uByte           bLength;
+       uByte           bDescriptorType;
+       uWord           bString[127];
+} UPACKED usb_string_descriptor_t;
+#define USB_MAX_STRING_LEN 128
+#define USB_LANGUAGE_TABLE 0   /* # of the string language id table */
+
+/* Hub specific request */
+#define UR_GET_BUS_STATE       0x02
+#define UR_CLEAR_TT_BUFFER     0x08
+#define UR_RESET_TT            0x09
+#define UR_GET_TT_STATE                0x0a
+#define UR_STOP_TT             0x0b
+
+/* Hub features */
+#define UHF_C_HUB_LOCAL_POWER  0
+#define UHF_C_HUB_OVER_CURRENT 1
+#define UHF_PORT_CONNECTION    0
+#define UHF_PORT_ENABLE                1
+#define UHF_PORT_SUSPEND       2
+#define UHF_PORT_OVER_CURRENT  3
+#define UHF_PORT_RESET         4
+#define UHF_PORT_L1            5
+#define UHF_PORT_POWER         8
+#define UHF_PORT_LOW_SPEED     9
+#define UHF_PORT_HIGH_SPEED    10
+#define UHF_C_PORT_CONNECTION  16
+#define UHF_C_PORT_ENABLE      17
+#define UHF_C_PORT_SUSPEND     18
+#define UHF_C_PORT_OVER_CURRENT        19
+#define UHF_C_PORT_RESET       20
+#define UHF_C_PORT_L1          23
+#define UHF_PORT_TEST          21
+#define UHF_PORT_INDICATOR     22
+
+typedef struct {
+       uByte           bDescLength;
+       uByte           bDescriptorType;
+       uByte           bNbrPorts;
+       uWord           wHubCharacteristics;
+#define UHD_PWR                        0x0003
+#define  UHD_PWR_GANGED                0x0000
+#define  UHD_PWR_INDIVIDUAL    0x0001
+#define  UHD_PWR_NO_SWITCH     0x0002
+#define UHD_COMPOUND           0x0004
+#define UHD_OC                 0x0018
+#define  UHD_OC_GLOBAL         0x0000
+#define  UHD_OC_INDIVIDUAL     0x0008
+#define  UHD_OC_NONE           0x0010
+#define UHD_TT_THINK           0x0060
+#define  UHD_TT_THINK_8                0x0000
+#define  UHD_TT_THINK_16       0x0020
+#define  UHD_TT_THINK_24       0x0040
+#define  UHD_TT_THINK_32       0x0060
+#define UHD_PORT_IND           0x0080
+       uByte           bPwrOn2PwrGood; /* delay in 2 ms units */
+#define UHD_PWRON_FACTOR 2
+       uByte           bHubContrCurrent;
+       uByte           DeviceRemovable[32]; /* max 255 ports */
+#define UHD_NOT_REMOV(desc, i) \
+    (((desc)->DeviceRemovable[(i)/8] >> ((i) % 8)) & 1)
+       /* deprecated */ uByte          PortPowerCtrlMask[1];
+} UPACKED usb_hub_descriptor_t;
+#define USB_HUB_DESCRIPTOR_SIZE 9 /* includes deprecated PortPowerCtrlMask */
+
+typedef struct {
+       uByte           bLength;
+       uByte           bDescriptorType;
+       uWord           bcdUSB;
+       uByte           bDeviceClass;
+       uByte           bDeviceSubClass;
+       uByte           bDeviceProtocol;
+       uByte           bMaxPacketSize0;
+       uByte           bNumConfigurations;
+       uByte           bReserved;
+} UPACKED usb_device_qualifier_t;
+#define USB_DEVICE_QUALIFIER_SIZE 10
+
+typedef struct {
+       uByte           bLength;
+       uByte           bDescriptorType;
+       uByte           bmAttributes;
+#define UOTG_SRP       0x01
+#define UOTG_HNP       0x02
+} UPACKED usb_otg_descriptor_t;
+
+/* OTG feature selectors */
+#define UOTG_B_HNP_ENABLE      3
+#define UOTG_A_HNP_SUPPORT     4
+#define UOTG_A_ALT_HNP_SUPPORT 5
+
+typedef struct {
+       uWord           wStatus;
+/* Device status flags */
+#define UDS_SELF_POWERED               0x0001
+#define UDS_REMOTE_WAKEUP              0x0002
+/* Endpoint status flags */
+#define UES_HALT                       0x0001
+} UPACKED usb_status_t;
+
+typedef struct {
+       uWord           wHubStatus;
+#define UHS_LOCAL_POWER                        0x0001
+#define UHS_OVER_CURRENT               0x0002
+       uWord           wHubChange;
+} UPACKED usb_hub_status_t;
+
+typedef struct {
+       uWord           wPortStatus;
+#define UPS_CURRENT_CONNECT_STATUS     0x0001
+#define UPS_PORT_ENABLED               0x0002
+#define UPS_SUSPEND                    0x0004
+#define UPS_OVERCURRENT_INDICATOR      0x0008
+#define UPS_RESET                      0x0010
+#define UPS_PORT_POWER                 0x0100
+#define UPS_LOW_SPEED                  0x0200
+#define UPS_HIGH_SPEED                 0x0400
+#define UPS_PORT_TEST                  0x0800
+#define UPS_PORT_INDICATOR             0x1000
+       uWord           wPortChange;
+#define UPS_C_CONNECT_STATUS           0x0001
+#define UPS_C_PORT_ENABLED             0x0002
+#define UPS_C_SUSPEND                  0x0004
+#define UPS_C_OVERCURRENT_INDICATOR    0x0008
+#define UPS_C_PORT_RESET               0x0010
+} UPACKED usb_port_status_t;
+
+#ifdef _MSC_VER
+#include <poppack.h>
+#endif
+
+/* Device class codes */
+#define UDCLASS_IN_INTERFACE   0x00
+#define UDCLASS_COMM           0x02
+#define UDCLASS_HUB            0x09
+#define  UDSUBCLASS_HUB                0x00
+#define  UDPROTO_FSHUB         0x00
+#define  UDPROTO_HSHUBSTT      0x01
+#define  UDPROTO_HSHUBMTT      0x02
+#define UDCLASS_DIAGNOSTIC     0xdc
+#define UDCLASS_WIRELESS       0xe0
+#define  UDSUBCLASS_RF         0x01
+#define   UDPROTO_BLUETOOTH    0x01
+#define UDCLASS_VENDOR         0xff
+
+/* Interface class codes */
+#define UICLASS_UNSPEC         0x00
+
+#define UICLASS_AUDIO          0x01
+#define  UISUBCLASS_AUDIOCONTROL       1
+#define  UISUBCLASS_AUDIOSTREAM                2
+#define  UISUBCLASS_MIDISTREAM         3
+
+#define UICLASS_CDC            0x02 /* communication */
+#define  UISUBCLASS_DIRECT_LINE_CONTROL_MODEL  1
+#define  UISUBCLASS_ABSTRACT_CONTROL_MODEL     2
+#define  UISUBCLASS_TELEPHONE_CONTROL_MODEL    3
+#define  UISUBCLASS_MULTICHANNEL_CONTROL_MODEL 4
+#define  UISUBCLASS_CAPI_CONTROLMODEL          5
+#define  UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL 6
+#define  UISUBCLASS_ATM_NETWORKING_CONTROL_MODEL 7
+#define   UIPROTO_CDC_AT                       1
+
+#define UICLASS_HID            0x03
+#define  UISUBCLASS_BOOT       1
+#define  UIPROTO_BOOT_KEYBOARD 1
+
+#define UICLASS_PHYSICAL       0x05
+
+#define UICLASS_IMAGE          0x06
+
+#define UICLASS_PRINTER                0x07
+#define  UISUBCLASS_PRINTER    1
+#define  UIPROTO_PRINTER_UNI   1
+#define  UIPROTO_PRINTER_BI    2
+#define  UIPROTO_PRINTER_1284  3
+
+#define UICLASS_MASS           0x08
+#define  UISUBCLASS_RBC                1
+#define  UISUBCLASS_SFF8020I   2
+#define  UISUBCLASS_QIC157     3
+#define  UISUBCLASS_UFI                4
+#define  UISUBCLASS_SFF8070I   5
+#define  UISUBCLASS_SCSI       6
+#define  UIPROTO_MASS_CBI_I    0
+#define  UIPROTO_MASS_CBI      1
+#define  UIPROTO_MASS_BBB_OLD  2       /* Not in the spec anymore */
+#define  UIPROTO_MASS_BBB      80      /* 'P' for the Iomega Zip drive */
+
+#define UICLASS_HUB            0x09
+#define  UISUBCLASS_HUB                0
+#define  UIPROTO_FSHUB         0
+#define  UIPROTO_HSHUBSTT      0 /* Yes, same as previous */
+#define  UIPROTO_HSHUBMTT      1
+
+#define UICLASS_CDC_DATA       0x0a
+#define  UISUBCLASS_DATA               0
+#define   UIPROTO_DATA_ISDNBRI         0x30    /* Physical iface */
+#define   UIPROTO_DATA_HDLC            0x31    /* HDLC */
+#define   UIPROTO_DATA_TRANSPARENT     0x32    /* Transparent */
+#define   UIPROTO_DATA_Q921M           0x50    /* Management for Q921 */
+#define   UIPROTO_DATA_Q921            0x51    /* Data for Q921 */
+#define   UIPROTO_DATA_Q921TM          0x52    /* TEI multiplexer for Q921 */
+#define   UIPROTO_DATA_V42BIS          0x90    /* Data compression */
+#define   UIPROTO_DATA_Q931            0x91    /* Euro-ISDN */
+#define   UIPROTO_DATA_V120            0x92    /* V.24 rate adaption */
+#define   UIPROTO_DATA_CAPI            0x93    /* CAPI 2.0 commands */
+#define   UIPROTO_DATA_HOST_BASED      0xfd    /* Host based driver */
+#define   UIPROTO_DATA_PUF             0xfe    /* see Prot. Unit Func. Desc.*/
+#define   UIPROTO_DATA_VENDOR          0xff    /* Vendor specific */
+
+#define UICLASS_SMARTCARD      0x0b
+
+/*#define UICLASS_FIRM_UPD     0x0c*/
+
+#define UICLASS_SECURITY       0x0d
+
+#define UICLASS_DIAGNOSTIC     0xdc
+
+#define UICLASS_WIRELESS       0xe0
+#define  UISUBCLASS_RF                 0x01
+#define   UIPROTO_BLUETOOTH            0x01
+
+#define UICLASS_APPL_SPEC      0xfe
+#define  UISUBCLASS_FIRMWARE_DOWNLOAD  1
+#define  UISUBCLASS_IRDA               2
+#define  UIPROTO_IRDA                  0
+
+#define UICLASS_VENDOR         0xff
+
+#define USB_HUB_MAX_DEPTH 5
+
+/*
+ * Minimum time a device needs to be powered down to go through
+ * a power cycle.  XXX Are these time in the spec?
+ */
+#define USB_POWER_DOWN_TIME    200 /* ms */
+#define USB_PORT_POWER_DOWN_TIME       100 /* ms */
+
+#if 0
+/* These are the values from the spec. */
+#define USB_PORT_RESET_DELAY   10  /* ms */
+#define USB_PORT_ROOT_RESET_DELAY 50  /* ms */
+#define USB_PORT_RESET_RECOVERY        10  /* ms */
+#define USB_PORT_POWERUP_DELAY 100 /* ms */
+#define USB_SET_ADDRESS_SETTLE 2   /* ms */
+#define USB_RESUME_DELAY       (20*5)  /* ms */
+#define USB_RESUME_WAIT                10  /* ms */
+#define USB_RESUME_RECOVERY    10  /* ms */
+#define USB_EXTRA_POWER_UP_TIME        0   /* ms */
+#else
+/* Allow for marginal (i.e. non-conforming) devices. */
+#define USB_PORT_RESET_DELAY   50  /* ms */
+#define USB_PORT_ROOT_RESET_DELAY 250  /* ms */
+#define USB_PORT_RESET_RECOVERY        250  /* ms */
+#define USB_PORT_POWERUP_DELAY 300 /* ms */
+#define USB_SET_ADDRESS_SETTLE 10  /* ms */
+#define USB_RESUME_DELAY       (50*5)  /* ms */
+#define USB_RESUME_WAIT                50  /* ms */
+#define USB_RESUME_RECOVERY    50  /* ms */
+#define USB_EXTRA_POWER_UP_TIME        20  /* ms */
+#endif
+
+#define USB_MIN_POWER          100 /* mA */
+#define USB_MAX_POWER          500 /* mA */
+
+#define USB_BUS_RESET_DELAY    100 /* ms XXX?*/
+
+#define USB_UNCONFIG_NO 0
+#define USB_UNCONFIG_INDEX (-1)
+
+/*** ioctl() related stuff ***/
+
+struct usb_ctl_request {
+       int     ucr_addr;
+       usb_device_request_t ucr_request;
+       void    *ucr_data;
+       int     ucr_flags;
+#define USBD_SHORT_XFER_OK     0x04    /* allow short reads */
+       int     ucr_actlen;             /* actual length transferred */
+};
+
+struct usb_alt_interface {
+       int     uai_config_index;
+       int     uai_interface_index;
+       int     uai_alt_no;
+};
+
+#define USB_CURRENT_CONFIG_INDEX (-1)
+#define USB_CURRENT_ALT_INDEX (-1)
+
+struct usb_config_desc {
+       int     ucd_config_index;
+       usb_config_descriptor_t ucd_desc;
+};
+
+struct usb_interface_desc {
+       int     uid_config_index;
+       int     uid_interface_index;
+       int     uid_alt_index;
+       usb_interface_descriptor_t uid_desc;
+};
+
+struct usb_endpoint_desc {
+       int     ued_config_index;
+       int     ued_interface_index;
+       int     ued_alt_index;
+       int     ued_endpoint_index;
+       usb_endpoint_descriptor_t ued_desc;
+};
+
+struct usb_full_desc {
+       int     ufd_config_index;
+       u_int   ufd_size;
+       u_char  *ufd_data;
+};
+
+struct usb_string_desc {
+       int     usd_string_index;
+       int     usd_language_id;
+       usb_string_descriptor_t usd_desc;
+};
+
+struct usb_ctl_report_desc {
+       int     ucrd_size;
+       u_char  ucrd_data[1024];        /* filled data size will vary */
+};
+
+typedef struct { u_int32_t cookie; } usb_event_cookie_t;
+
+#define USB_MAX_DEVNAMES 4
+#define USB_MAX_DEVNAMELEN 16
+struct usb_device_info {
+       u_int8_t        udi_bus;
+       u_int8_t        udi_addr;       /* device address */
+       usb_event_cookie_t udi_cookie;
+       char            udi_product[USB_MAX_STRING_LEN];
+       char            udi_vendor[USB_MAX_STRING_LEN];
+       char            udi_release[8];
+       u_int16_t       udi_productNo;
+       u_int16_t       udi_vendorNo;
+       u_int16_t       udi_releaseNo;
+       u_int8_t        udi_class;
+       u_int8_t        udi_subclass;
+       u_int8_t        udi_protocol;
+       u_int8_t        udi_config;
+       u_int8_t        udi_speed;
+#define USB_SPEED_UNKNOWN      0
+#define USB_SPEED_LOW          1
+#define USB_SPEED_FULL         2
+#define USB_SPEED_HIGH         3
+#define USB_SPEED_VARIABLE     4
+#define USB_SPEED_SUPER                5
+       int             udi_power;      /* power consumption in mA, 0 if selfpowered */
+       int             udi_nports;
+       char            udi_devnames[USB_MAX_DEVNAMES][USB_MAX_DEVNAMELEN];
+       u_int8_t        udi_ports[16];/* hub only: addresses of devices on ports */
+#define USB_PORT_ENABLED 0xff
+#define USB_PORT_SUSPENDED 0xfe
+#define USB_PORT_POWERED 0xfd
+#define USB_PORT_DISABLED 0xfc
+};
+
+struct usb_ctl_report {
+       int     ucr_report;
+       u_char  ucr_data[1024]; /* filled data size will vary */
+};
+
+struct usb_device_stats {
+       u_long  uds_requests[4];        /* indexed by transfer type UE_* */
+};
+
+#define WUSB_MIN_IE                    0x80
+#define WUSB_WCTA_IE                   0x80
+#define WUSB_WCONNECTACK_IE            0x81
+#define WUSB_WHOSTINFO_IE              0x82
+#define  WUHI_GET_CA(_bmAttributes_) ((_bmAttributes_) & 0x3)
+#define   WUHI_CA_RECONN               0x00
+#define   WUHI_CA_LIMITED              0x01
+#define   WUHI_CA_ALL                  0x03
+#define  WUHI_GET_MLSI(_bmAttributes_) (((_bmAttributes_) & 0x38) >> 3)
+#define WUSB_WCHCHANGEANNOUNCE_IE      0x83
+#define WUSB_WDEV_DISCONNECT_IE                0x84
+#define WUSB_WHOST_DISCONNECT_IE       0x85
+#define WUSB_WRELEASE_CHANNEL_IE       0x86
+#define WUSB_WWORK_IE                  0x87
+#define WUSB_WCHANNEL_STOP_IE          0x88
+#define WUSB_WDEV_KEEPALIVE_IE         0x89
+#define WUSB_WISOCH_DISCARD_IE         0x8A
+#define WUSB_WRESETDEVICE_IE           0x8B
+#define WUSB_WXMIT_PACKET_ADJUST_IE    0x8C
+#define WUSB_MAX_IE                    0x8C
+
+/* Device Notification Types */
+
+#define WUSB_DN_MIN                    0x01
+#define WUSB_DN_CONNECT                        0x01
+# define WUSB_DA_OLDCONN       0x00
+# define WUSB_DA_NEWCONN       0x01
+# define WUSB_DA_SELF_BEACON   0x02
+# define WUSB_DA_DIR_BEACON    0x04
+# define WUSB_DA_NO_BEACON     0x06
+#define WUSB_DN_DISCONNECT             0x02
+#define WUSB_DN_EPRDY                  0x03
+#define WUSB_DN_MASAVAILCHANGED                0x04
+#define WUSB_DN_REMOTEWAKEUP           0x05
+#define WUSB_DN_SLEEP                  0x06
+#define WUSB_DN_ALIVE                  0x07
+#define WUSB_DN_MAX                    0x07
+
+#ifdef _MSC_VER
+#include <pshpack1.h>
+#endif
+
+/* WUSB Handshake Data.  Used during the SET/GET HANDSHAKE requests */
+typedef struct wusb_hndshk_data {
+       uByte bMessageNumber;
+       uByte bStatus;
+       uByte tTKID[3];
+       uByte bReserved;
+       uByte CDID[16];
+       uByte Nonce[16];
+       uByte MIC[8];
+} UPACKED wusb_hndshk_data_t;
+#define WUSB_HANDSHAKE_LEN_FOR_MIC     38
+
+/* WUSB Connection Context */
+typedef struct wusb_conn_context {
+       uByte CHID [16];
+       uByte CDID [16];
+       uByte CK [16];
+} UPACKED wusb_conn_context_t;
+
+/* WUSB Security Descriptor */
+typedef struct wusb_security_desc {
+       uByte bLength;
+       uByte bDescriptorType;
+       uWord wTotalLength;
+       uByte bNumEncryptionTypes;
+} UPACKED wusb_security_desc_t;
+
+/* WUSB Encryption Type Descriptor */
+typedef struct wusb_encrypt_type_desc {
+       uByte bLength;
+       uByte bDescriptorType;
+
+       uByte bEncryptionType;
+#define WUETD_UNSECURE         0
+#define WUETD_WIRED            1
+#define WUETD_CCM_1            2
+#define WUETD_RSA_1            3
+
+       uByte bEncryptionValue;
+       uByte bAuthKeyIndex;
+} UPACKED wusb_encrypt_type_desc_t;
+
+/* WUSB Key Descriptor */
+typedef struct wusb_key_desc {
+       uByte bLength;
+       uByte bDescriptorType;
+       uByte tTKID[3];
+       uByte bReserved;
+       uByte KeyData[1];       /* variable length */
+} UPACKED wusb_key_desc_t;
+
+/* WUSB BOS Descriptor (Binary device Object Store) */
+typedef struct wusb_bos_desc {
+       uByte bLength;
+       uByte bDescriptorType;
+       uWord wTotalLength;
+       uByte bNumDeviceCaps;
+} UPACKED wusb_bos_desc_t;
+
+#define USB_DEVICE_CAPABILITY_20_EXTENSION     0x02
+typedef struct usb_dev_cap_20_ext_desc {
+       uByte bLength;
+       uByte bDescriptorType;
+       uByte bDevCapabilityType;
+#define USB_20_EXT_LPM                         0x02
+       uDWord bmAttributes;
+} UPACKED usb_dev_cap_20_ext_desc_t;
+
+#define USB_DEVICE_CAPABILITY_SS_USB           0x03
+typedef struct usb_dev_cap_ss_usb {
+       uByte bLength;
+       uByte bDescriptorType;
+       uByte bDevCapabilityType;
+#define USB_DC_SS_USB_LTM_CAPABLE              0x02
+       uByte bmAttributes;
+#define USB_DC_SS_USB_SPEED_SUPPORT_LOW                0x01
+#define USB_DC_SS_USB_SPEED_SUPPORT_FULL       0x02
+#define USB_DC_SS_USB_SPEED_SUPPORT_HIGH       0x04
+#define USB_DC_SS_USB_SPEED_SUPPORT_SS         0x08
+       uWord wSpeedsSupported;
+       uByte bFunctionalitySupport;
+       uByte bU1DevExitLat;
+       uWord wU2DevExitLat;
+} UPACKED usb_dev_cap_ss_usb_t;
+
+#define USB_DEVICE_CAPABILITY_CONTAINER_ID     0x04
+typedef struct usb_dev_cap_container_id {
+       uByte bLength;
+       uByte bDescriptorType;
+       uByte bDevCapabilityType;
+       uByte bReserved;
+       uByte containerID[16];
+} UPACKED usb_dev_cap_container_id_t;
+
+/* Device Capability Type Codes */
+#define WUSB_DEVICE_CAPABILITY_WIRELESS_USB 0x01
+
+/* Device Capability Descriptor */
+typedef struct wusb_dev_cap_desc {
+       uByte bLength;
+       uByte bDescriptorType;
+       uByte bDevCapabilityType;
+       uByte caps[1];  /* Variable length */
+} UPACKED wusb_dev_cap_desc_t;
+
+/* Device Capability Descriptor */
+typedef struct wusb_dev_cap_uwb_desc {
+       uByte bLength;
+       uByte bDescriptorType;
+       uByte bDevCapabilityType;
+       uByte bmAttributes;
+       uWord wPHYRates;        /* Bitmap */
+       uByte bmTFITXPowerInfo;
+       uByte bmFFITXPowerInfo;
+       uWord bmBandGroup;
+       uByte bReserved;
+} UPACKED wusb_dev_cap_uwb_desc_t;
+
+/* Wireless USB Endpoint Companion Descriptor */
+typedef struct wusb_endpoint_companion_desc {
+       uByte bLength;
+       uByte bDescriptorType;
+       uByte bMaxBurst;
+       uByte bMaxSequence;
+       uWord wMaxStreamDelay;
+       uWord wOverTheAirPacketSize;
+       uByte bOverTheAirInterval;
+       uByte bmCompAttributes;
+} UPACKED wusb_endpoint_companion_desc_t;
+
+/* Wireless USB Numeric Association M1 Data Structure */
+typedef struct wusb_m1_data {
+       uByte version;
+       uWord langId;
+       uByte deviceFriendlyNameLength;
+       uByte sha_256_m3[32];
+       uByte deviceFriendlyName[256];
+} UPACKED wusb_m1_data_t;
+
+typedef struct wusb_m2_data {
+       uByte version;
+       uWord langId;
+       uByte hostFriendlyNameLength;
+       uByte pkh[384];
+       uByte hostFriendlyName[256];
+} UPACKED wusb_m2_data_t;
+
+typedef struct wusb_m3_data {
+       uByte pkd[384];
+       uByte nd;
+} UPACKED wusb_m3_data_t;
+
+typedef struct wusb_m4_data {
+       uDWord _attributeTypeIdAndLength_1;
+       uWord  associationTypeId;
+
+       uDWord _attributeTypeIdAndLength_2;
+       uWord  associationSubTypeId;
+
+       uDWord _attributeTypeIdAndLength_3;
+       uDWord length;
+
+       uDWord _attributeTypeIdAndLength_4;
+       uDWord associationStatus;
+
+       uDWord _attributeTypeIdAndLength_5;
+       uByte  chid[16];
+
+       uDWord _attributeTypeIdAndLength_6;
+       uByte  cdid[16];
+
+       uDWord _attributeTypeIdAndLength_7;
+       uByte  bandGroups[2];
+} UPACKED wusb_m4_data_t;
+
+#ifdef _MSC_VER
+#include <poppack.h>
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _USB_H_ */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/Makefile
@@ -0,0 +1,85 @@
+#
+# Makefile for DWC_otg Highspeed USB controller driver
+#
+
+ifneq ($(KERNELRELEASE),)
+
+# Use the BUS_INTERFACE variable to compile the software for either
+# PCI(PCI_INTERFACE) or LM(LM_INTERFACE) bus.
+ifeq ($(BUS_INTERFACE),)
+#      BUS_INTERFACE = -DPCI_INTERFACE
+#      BUS_INTERFACE = -DLM_INTERFACE
+        BUS_INTERFACE = -DPLATFORM_INTERFACE
+endif
+
+#ccflags-y     += -DDEBUG
+#ccflags-y     += -DDWC_OTG_DEBUGLEV=1 # reduce common debug msgs
+
+# Use one of the following flags to compile the software in host-only or
+# device-only mode.
+#ccflags-y        += -DDWC_HOST_ONLY
+#ccflags-y        += -DDWC_DEVICE_ONLY
+
+ccflags-y      += -Dlinux -DDWC_HS_ELECT_TST
+#ccflags-y     += -DDWC_EN_ISOC
+ccflags-y      += -I$(srctree)/drivers/usb/host/dwc_common_port
+#ccflags-y     += -I$(PORTLIB)
+ccflags-y      += -DDWC_LINUX
+ccflags-y      += $(CFI)
+ccflags-y      += $(BUS_INTERFACE)
+#ccflags-y     += -DDWC_DEV_SRPCAP
+
+obj-$(CONFIG_USB_DWCOTG) += dwc_otg.o
+
+dwc_otg-objs   := dwc_otg_driver.o dwc_otg_attr.o
+dwc_otg-objs   += dwc_otg_cil.o dwc_otg_cil_intr.o
+dwc_otg-objs   += dwc_otg_pcd_linux.o dwc_otg_pcd.o dwc_otg_pcd_intr.o
+dwc_otg-objs   += dwc_otg_hcd.o dwc_otg_hcd_linux.o dwc_otg_hcd_intr.o dwc_otg_hcd_queue.o dwc_otg_hcd_ddma.o
+dwc_otg-objs   += dwc_otg_adp.o
+dwc_otg-objs   += dwc_otg_fiq_fsm.o
+ifneq ($(CONFIG_ARM64),y)
+dwc_otg-objs   += dwc_otg_fiq_stub.o
+endif
+
+ifneq ($(CFI),)
+dwc_otg-objs   += dwc_otg_cfi.o
+endif
+
+kernrelwd := $(subst ., ,$(KERNELRELEASE))
+kernrel3 := $(word 1,$(kernrelwd)).$(word 2,$(kernrelwd)).$(word 3,$(kernrelwd))
+
+ifneq ($(kernrel3),2.6.20)
+ccflags-y += $(CPPFLAGS)
+endif
+
+else
+
+PWD            := $(shell pwd)
+PORTLIB                := $(PWD)/../dwc_common_port
+
+# Command paths
+CTAGS          := $(CTAGS)
+DOXYGEN                := $(DOXYGEN)
+
+default: portlib
+       $(MAKE) -C$(KDIR) M=$(PWD) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) modules
+
+install: default
+       $(MAKE) -C$(KDIR) M=$(PORTLIB) modules_install
+       $(MAKE) -C$(KDIR) M=$(PWD) modules_install
+
+portlib:
+       $(MAKE) -C$(KDIR) M=$(PORTLIB) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) modules
+       cp $(PORTLIB)/Module.symvers $(PWD)/
+
+docs:  $(wildcard *.[hc]) doc/doxygen.cfg
+       $(DOXYGEN) doc/doxygen.cfg
+
+tags:  $(wildcard *.[hc])
+       $(CTAGS) -e $(wildcard *.[hc]) $(wildcard linux/*.[hc]) $(wildcard $(KDIR)/include/linux/usb*.h)
+
+
+clean:
+       rm -rf   *.o *.ko .*cmd *.mod.c .tmp_versions Module.symvers
+
+endif
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/doc/doxygen.cfg
@@ -0,0 +1,224 @@
+# Doxyfile 1.3.9.1
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "DesignWare USB 2.0 OTG Controller (DWC_otg) Device Driver"
+PROJECT_NUMBER         = v3.00a
+OUTPUT_DIRECTORY       = ./doc/
+CREATE_SUBDIRS         = NO
+OUTPUT_LANGUAGE        = English
+BRIEF_MEMBER_DESC      = YES
+REPEAT_BRIEF           = YES
+ABBREVIATE_BRIEF       = "The $name class" \
+                         "The $name widget" \
+                         "The $name file" \
+                         is \
+                         provides \
+                         specifies \
+                         contains \
+                         represents \
+                         a \
+                         an \
+                         the
+ALWAYS_DETAILED_SEC    = NO
+INLINE_INHERITED_MEMB  = NO
+FULL_PATH_NAMES        = NO
+STRIP_FROM_PATH        =
+STRIP_FROM_INC_PATH    =
+SHORT_NAMES            = NO
+JAVADOC_AUTOBRIEF      = YES
+MULTILINE_CPP_IS_BRIEF = NO
+INHERIT_DOCS           = YES
+DISTRIBUTE_GROUP_DOC   = NO
+TAB_SIZE               = 8
+ALIASES                =
+OPTIMIZE_OUTPUT_FOR_C  = YES
+OPTIMIZE_OUTPUT_JAVA   = NO
+SUBGROUPING            = YES
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+EXTRACT_ALL            = NO
+EXTRACT_PRIVATE        = YES
+EXTRACT_STATIC         = YES
+EXTRACT_LOCAL_CLASSES  = YES
+EXTRACT_LOCAL_METHODS  = NO
+HIDE_UNDOC_MEMBERS     = NO
+HIDE_UNDOC_CLASSES     = NO
+HIDE_FRIEND_COMPOUNDS  = NO
+HIDE_IN_BODY_DOCS      = NO
+INTERNAL_DOCS          = NO
+CASE_SENSE_NAMES       = NO
+HIDE_SCOPE_NAMES       = NO
+SHOW_INCLUDE_FILES     = YES
+INLINE_INFO            = YES
+SORT_MEMBER_DOCS       = NO
+SORT_BRIEF_DOCS        = NO
+SORT_BY_SCOPE_NAME     = NO
+GENERATE_TODOLIST      = YES
+GENERATE_TESTLIST      = YES
+GENERATE_BUGLIST       = YES
+GENERATE_DEPRECATEDLIST= YES
+ENABLED_SECTIONS       =
+MAX_INITIALIZER_LINES  = 30
+SHOW_USED_FILES        = YES
+SHOW_DIRECTORIES       = YES
+#---------------------------------------------------------------------------
+# configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+QUIET                  = YES
+WARNINGS               = YES
+WARN_IF_UNDOCUMENTED   = NO
+WARN_IF_DOC_ERROR      = YES
+WARN_FORMAT            = "$file:$line: $text"
+WARN_LOGFILE           =
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = .
+FILE_PATTERNS          = *.c \
+                         *.h \
+                         ./linux/*.c \
+                         ./linux/*.h
+RECURSIVE              = NO
+EXCLUDE                = ./test/ \
+                         ./dwc_otg/.AppleDouble/
+EXCLUDE_SYMLINKS       = YES
+EXCLUDE_PATTERNS       = *.mod.*
+EXAMPLE_PATH           =
+EXAMPLE_PATTERNS       = *
+EXAMPLE_RECURSIVE      = NO
+IMAGE_PATH             =
+INPUT_FILTER           =
+FILTER_PATTERNS        =
+FILTER_SOURCE_FILES    = NO
+#---------------------------------------------------------------------------
+# configuration options related to source browsing
+#---------------------------------------------------------------------------
+SOURCE_BROWSER         = YES
+INLINE_SOURCES         = NO
+STRIP_CODE_COMMENTS    = YES
+REFERENCED_BY_RELATION = NO
+REFERENCES_RELATION    = NO
+VERBATIM_HEADERS       = NO
+#---------------------------------------------------------------------------
+# configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+ALPHABETICAL_INDEX     = NO
+COLS_IN_ALPHA_INDEX    = 5
+IGNORE_PREFIX          =
+#---------------------------------------------------------------------------
+# configuration options related to the HTML output
+#---------------------------------------------------------------------------
+GENERATE_HTML          = YES
+HTML_OUTPUT            = html
+HTML_FILE_EXTENSION    = .html
+HTML_HEADER            =
+HTML_FOOTER            =
+HTML_STYLESHEET        =
+HTML_ALIGN_MEMBERS     = YES
+GENERATE_HTMLHELP      = NO
+CHM_FILE               =
+HHC_LOCATION           =
+GENERATE_CHI           = NO
+BINARY_TOC             = NO
+TOC_EXPAND             = NO
+DISABLE_INDEX          = NO
+ENUM_VALUES_PER_LINE   = 4
+GENERATE_TREEVIEW      = YES
+TREEVIEW_WIDTH         = 250
+#---------------------------------------------------------------------------
+# configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+GENERATE_LATEX         = NO
+LATEX_OUTPUT           = latex
+LATEX_CMD_NAME         = latex
+MAKEINDEX_CMD_NAME     = makeindex
+COMPACT_LATEX          = NO
+PAPER_TYPE             = a4wide
+EXTRA_PACKAGES         =
+LATEX_HEADER           =
+PDF_HYPERLINKS         = NO
+USE_PDFLATEX           = NO
+LATEX_BATCHMODE        = NO
+LATEX_HIDE_INDICES     = NO
+#---------------------------------------------------------------------------
+# configuration options related to the RTF output
+#---------------------------------------------------------------------------
+GENERATE_RTF           = NO
+RTF_OUTPUT             = rtf
+COMPACT_RTF            = NO
+RTF_HYPERLINKS         = NO
+RTF_STYLESHEET_FILE    =
+RTF_EXTENSIONS_FILE    =
+#---------------------------------------------------------------------------
+# configuration options related to the man page output
+#---------------------------------------------------------------------------
+GENERATE_MAN           = NO
+MAN_OUTPUT             = man
+MAN_EXTENSION          = .3
+MAN_LINKS              = NO
+#---------------------------------------------------------------------------
+# configuration options related to the XML output
+#---------------------------------------------------------------------------
+GENERATE_XML           = NO
+XML_OUTPUT             = xml
+XML_SCHEMA             =
+XML_DTD                =
+XML_PROGRAMLISTING     = YES
+#---------------------------------------------------------------------------
+# configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+GENERATE_AUTOGEN_DEF   = NO
+#---------------------------------------------------------------------------
+# configuration options related to the Perl module output
+#---------------------------------------------------------------------------
+GENERATE_PERLMOD       = NO
+PERLMOD_LATEX          = NO
+PERLMOD_PRETTY         = YES
+PERLMOD_MAKEVAR_PREFIX =
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor
+#---------------------------------------------------------------------------
+ENABLE_PREPROCESSING   = YES
+MACRO_EXPANSION        = YES
+EXPAND_ONLY_PREDEF     = YES
+SEARCH_INCLUDES        = YES
+INCLUDE_PATH           =
+INCLUDE_FILE_PATTERNS  =
+PREDEFINED             = DEVICE_ATTR DWC_EN_ISOC
+EXPAND_AS_DEFINED      = DWC_OTG_DEVICE_ATTR_BITFIELD_SHOW DWC_OTG_DEVICE_ATTR_BITFIELD_STORE DWC_OTG_DEVICE_ATTR_BITFIELD_RW DWC_OTG_DEVICE_ATTR_BITFIELD_RO DWC_OTG_DEVICE_ATTR_REG_SHOW DWC_OTG_DEVICE_ATTR_REG_STORE DWC_OTG_DEVICE_ATTR_REG32_RW DWC_OTG_DEVICE_ATTR_REG32_RO DWC_EN_ISOC
+SKIP_FUNCTION_MACROS   = NO
+#---------------------------------------------------------------------------
+# Configuration::additions related to external references
+#---------------------------------------------------------------------------
+TAGFILES               =
+GENERATE_TAGFILE       =
+ALLEXTERNALS           = NO
+EXTERNAL_GROUPS        = YES
+PERL_PATH              = /usr/bin/perl
+#---------------------------------------------------------------------------
+# Configuration options related to the dot tool
+#---------------------------------------------------------------------------
+CLASS_DIAGRAMS         = YES
+HIDE_UNDOC_RELATIONS   = YES
+HAVE_DOT               = NO
+CLASS_GRAPH            = YES
+COLLABORATION_GRAPH    = YES
+UML_LOOK               = NO
+TEMPLATE_RELATIONS     = NO
+INCLUDE_GRAPH          = YES
+INCLUDED_BY_GRAPH      = YES
+CALL_GRAPH             = NO
+GRAPHICAL_HIERARCHY    = YES
+DOT_IMAGE_FORMAT       = png
+DOT_PATH               =
+DOTFILE_DIRS           =
+MAX_DOT_GRAPH_DEPTH    = 1000
+GENERATE_LEGEND        = YES
+DOT_CLEANUP            = YES
+#---------------------------------------------------------------------------
+# Configuration::additions related to the search engine
+#---------------------------------------------------------------------------
+SEARCHENGINE           = NO
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dummy_audio.c
@@ -0,0 +1,1574 @@
+/*
+ * zero.c -- Gadget Zero, for USB development
+ *
+ * Copyright (C) 2003-2004 David Brownell
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+/*
+ * Gadget Zero only needs two bulk endpoints, and is an example of how you
+ * can write a hardware-agnostic gadget driver running inside a USB device.
+ *
+ * Hardware details are visible (see CONFIG_USB_ZERO_* below) but don't
+ * affect most of the driver.
+ *
+ * Use it with the Linux host/master side "usbtest" driver to get a basic
+ * functional test of your device-side usb stack, or with "usb-skeleton".
+ *
+ * It supports two similar configurations.  One sinks whatever the usb host
+ * writes, and in return sources zeroes.  The other loops whatever the host
+ * writes back, so the host can read it.  Module options include:
+ *
+ *   buflen=N          default N=4096, buffer size used
+ *   qlen=N            default N=32, how many buffers in the loopback queue
+ *   loopdefault       default false, list loopback config first
+ *
+ * Many drivers will only have one configuration, letting them be much
+ * simpler if they also don't support high speed operation (like this
+ * driver does).
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/uts.h>
+#include <linux/version.h>
+#include <linux/device.h>
+#include <linux/moduleparam.h>
+#include <linux/proc_fs.h>
+
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/unaligned.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
+# include <linux/usb/ch9.h>
+#else
+# include <linux/usb_ch9.h>
+#endif
+
+#include <linux/usb_gadget.h>
+
+
+/*-------------------------------------------------------------------------*/
+/*-------------------------------------------------------------------------*/
+
+
+static int utf8_to_utf16le(const char *s, u16 *cp, unsigned len)
+{
+       int     count = 0;
+       u8      c;
+       u16     uchar;
+
+       /* this insists on correct encodings, though not minimal ones.
+        * BUT it currently rejects legit 4-byte UTF-8 code points,
+        * which need surrogate pairs.  (Unicode 3.1 can use them.)
+        */
+       while (len != 0 && (c = (u8) *s++) != 0) {
+               if (unlikely(c & 0x80)) {
+                       // 2-byte sequence:
+                       // 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
+                       if ((c & 0xe0) == 0xc0) {
+                               uchar = (c & 0x1f) << 6;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c;
+
+                       // 3-byte sequence (most CJKV characters):
+                       // zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
+                       } else if ((c & 0xf0) == 0xe0) {
+                               uchar = (c & 0x0f) << 12;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c << 6;
+
+                               c = (u8) *s++;
+                               if ((c & 0xc0) != 0xc0)
+                                       goto fail;
+                               c &= 0x3f;
+                               uchar |= c;
+
+                               /* no bogus surrogates */
+                               if (0xd800 <= uchar && uchar <= 0xdfff)
+                                       goto fail;
+
+                       // 4-byte sequence (surrogate pairs, currently rare):
+                       // 11101110wwwwzzzzyy + 110111yyyyxxxxxx
+                       //     = 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx
+                       // (uuuuu = wwww + 1)
+                       // FIXME accept the surrogate code points (only)
+
+                       } else
+                               goto fail;
+               } else
+                       uchar = c;
+               put_unaligned (cpu_to_le16 (uchar), cp++);
+               count++;
+               len--;
+       }
+       return count;
+fail:
+       return -1;
+}
+
+
+/**
+ * usb_gadget_get_string - fill out a string descriptor
+ * @table: of c strings encoded using UTF-8
+ * @id: string id, from low byte of wValue in get string descriptor
+ * @buf: at least 256 bytes
+ *
+ * Finds the UTF-8 string matching the ID, and converts it into a
+ * string descriptor in utf16-le.
+ * Returns length of descriptor (always even) or negative errno
+ *
+ * If your driver needs stings in multiple languages, you'll probably
+ * "switch (wIndex) { ... }"  in your ep0 string descriptor logic,
+ * using this routine after choosing which set of UTF-8 strings to use.
+ * Note that US-ASCII is a strict subset of UTF-8; any string bytes with
+ * the eighth bit set will be multibyte UTF-8 characters, not ISO-8859/1
+ * characters (which are also widely used in C strings).
+ */
+int
+usb_gadget_get_string (struct usb_gadget_strings *table, int id, u8 *buf)
+{
+       struct usb_string       *s;
+       int                     len;
+
+       /* descriptor 0 has the language id */
+       if (id == 0) {
+               buf [0] = 4;
+               buf [1] = USB_DT_STRING;
+               buf [2] = (u8) table->language;
+               buf [3] = (u8) (table->language >> 8);
+               return 4;
+       }
+       for (s = table->strings; s && s->s; s++)
+               if (s->id == id)
+                       break;
+
+       /* unrecognized: stall. */
+       if (!s || !s->s)
+               return -EINVAL;
+
+       /* string descriptors have length, tag, then UTF16-LE text */
+       len = min ((size_t) 126, strlen (s->s));
+       memset (buf + 2, 0, 2 * len);   /* zero all the bytes */
+       len = utf8_to_utf16le(s->s, (u16 *)&buf[2], len);
+       if (len < 0)
+               return -EINVAL;
+       buf [0] = (len + 1) * 2;
+       buf [1] = USB_DT_STRING;
+       return buf [0];
+}
+
+
+/*-------------------------------------------------------------------------*/
+/*-------------------------------------------------------------------------*/
+
+
+/**
+ * usb_descriptor_fillbuf - fill buffer with descriptors
+ * @buf: Buffer to be filled
+ * @buflen: Size of buf
+ * @src: Array of descriptor pointers, terminated by null pointer.
+ *
+ * Copies descriptors into the buffer, returning the length or a
+ * negative error code if they can't all be copied.  Useful when
+ * assembling descriptors for an associated set of interfaces used
+ * as part of configuring a composite device; or in other cases where
+ * sets of descriptors need to be marshaled.
+ */
+int
+usb_descriptor_fillbuf(void *buf, unsigned buflen,
+               const struct usb_descriptor_header **src)
+{
+       u8      *dest = buf;
+
+       if (!src)
+               return -EINVAL;
+
+       /* fill buffer from src[] until null descriptor ptr */
+       for (; 0 != *src; src++) {
+               unsigned                len = (*src)->bLength;
+
+               if (len > buflen)
+                       return -EINVAL;
+               memcpy(dest, *src, len);
+               buflen -= len;
+               dest += len;
+       }
+       return dest - (u8 *)buf;
+}
+
+
+/**
+ * usb_gadget_config_buf - builts a complete configuration descriptor
+ * @config: Header for the descriptor, including characteristics such
+ *     as power requirements and number of interfaces.
+ * @desc: Null-terminated vector of pointers to the descriptors (interface,
+ *     endpoint, etc) defining all functions in this device configuration.
+ * @buf: Buffer for the resulting configuration descriptor.
+ * @length: Length of buffer.  If this is not big enough to hold the
+ *     entire configuration descriptor, an error code will be returned.
+ *
+ * This copies descriptors into the response buffer, building a descriptor
+ * for that configuration.  It returns the buffer length or a negative
+ * status code.  The config.wTotalLength field is set to match the length
+ * of the result, but other descriptor fields (including power usage and
+ * interface count) must be set by the caller.
+ *
+ * Gadget drivers could use this when constructing a config descriptor
+ * in response to USB_REQ_GET_DESCRIPTOR.  They will need to patch the
+ * resulting bDescriptorType value if USB_DT_OTHER_SPEED_CONFIG is needed.
+ */
+int usb_gadget_config_buf(
+       const struct usb_config_descriptor      *config,
+       void                                    *buf,
+       unsigned                                length,
+       const struct usb_descriptor_header      **desc
+)
+{
+       struct usb_config_descriptor            *cp = buf;
+       int                                     len;
+
+       /* config descriptor first */
+       if (length < USB_DT_CONFIG_SIZE || !desc)
+               return -EINVAL;
+       *cp = *config;
+
+       /* then interface/endpoint/class/vendor/... */
+       len = usb_descriptor_fillbuf(USB_DT_CONFIG_SIZE + (u8*)buf,
+                       length - USB_DT_CONFIG_SIZE, desc);
+       if (len < 0)
+               return len;
+       len += USB_DT_CONFIG_SIZE;
+       if (len > 0xffff)
+               return -EINVAL;
+
+       /* patch up the config descriptor */
+       cp->bLength = USB_DT_CONFIG_SIZE;
+       cp->bDescriptorType = USB_DT_CONFIG;
+       cp->wTotalLength = cpu_to_le16(len);
+       cp->bmAttributes |= USB_CONFIG_ATT_ONE;
+       return len;
+}
+
+/*-------------------------------------------------------------------------*/
+/*-------------------------------------------------------------------------*/
+
+
+#define RBUF_LEN (1024*1024)
+static int rbuf_start;
+static int rbuf_len;
+static __u8 rbuf[RBUF_LEN];
+
+/*-------------------------------------------------------------------------*/
+
+#define DRIVER_VERSION         "St Patrick's Day 2004"
+
+static const char shortname [] = "zero";
+static const char longname [] = "YAMAHA YST-MS35D USB Speaker  ";
+
+static const char source_sink [] = "source and sink data";
+static const char loopback [] = "loop input to output";
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * driver assumes self-powered hardware, and
+ * has no way for users to trigger remote wakeup.
+ *
+ * this version autoconfigures as much as possible,
+ * which is reasonable for most "bulk-only" drivers.
+ */
+static const char *EP_IN_NAME;         /* source */
+static const char *EP_OUT_NAME;                /* sink */
+
+/*-------------------------------------------------------------------------*/
+
+/* big enough to hold our biggest descriptor */
+#define USB_BUFSIZ     512
+
+struct zero_dev {
+       spinlock_t              lock;
+       struct usb_gadget       *gadget;
+       struct usb_request      *req;           /* for control responses */
+
+       /* when configured, we have one of two configs:
+        * - source data (in to host) and sink it (out from host)
+        * - or loop it back (out from host back in to host)
+        */
+       u8                      config;
+       struct usb_ep           *in_ep, *out_ep;
+
+       /* autoresume timer */
+       struct timer_list       resume;
+};
+
+#define xprintk(d,level,fmt,args...) \
+       dev_printk(level , &(d)->gadget->dev , fmt , ## args)
+
+#ifdef DEBUG
+#define DBG(dev,fmt,args...) \
+       xprintk(dev , KERN_DEBUG , fmt , ## args)
+#else
+#define DBG(dev,fmt,args...) \
+       do { } while (0)
+#endif /* DEBUG */
+
+#ifdef VERBOSE
+#define VDBG   DBG
+#else
+#define VDBG(dev,fmt,args...) \
+       do { } while (0)
+#endif /* VERBOSE */
+
+#define ERROR(dev,fmt,args...) \
+       xprintk(dev , KERN_ERR , fmt , ## args)
+#define WARN(dev,fmt,args...) \
+       xprintk(dev , KERN_WARNING , fmt , ## args)
+#define INFO(dev,fmt,args...) \
+       xprintk(dev , KERN_INFO , fmt , ## args)
+
+/*-------------------------------------------------------------------------*/
+
+static unsigned buflen = 4096;
+static unsigned qlen = 32;
+static unsigned pattern = 0;
+
+module_param (buflen, uint, S_IRUGO|S_IWUSR);
+module_param (qlen, uint, S_IRUGO|S_IWUSR);
+module_param (pattern, uint, S_IRUGO|S_IWUSR);
+
+/*
+ * if it's nonzero, autoresume says how many seconds to wait
+ * before trying to wake up the host after suspend.
+ */
+static unsigned autoresume = 0;
+module_param (autoresume, uint, 0);
+
+/*
+ * Normally the "loopback" configuration is second (index 1) so
+ * it's not the default.  Here's where to change that order, to
+ * work better with hosts where config changes are problematic.
+ * Or controllers (like superh) that only support one config.
+ */
+static int loopdefault = 0;
+
+module_param (loopdefault, bool, S_IRUGO|S_IWUSR);
+
+/*-------------------------------------------------------------------------*/
+
+/* Thanks to NetChip Technologies for donating this product ID.
+ *
+ * DO NOT REUSE THESE IDs with a protocol-incompatible driver!!  Ever!!
+ * Instead:  allocate your own, using normal USB-IF procedures.
+ */
+#ifndef        CONFIG_USB_ZERO_HNPTEST
+#define DRIVER_VENDOR_NUM      0x0525          /* NetChip */
+#define DRIVER_PRODUCT_NUM     0xa4a0          /* Linux-USB "Gadget Zero" */
+#else
+#define DRIVER_VENDOR_NUM      0x1a0a          /* OTG test device IDs */
+#define DRIVER_PRODUCT_NUM     0xbadd
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * DESCRIPTORS ... most are static, but strings and (full)
+ * configuration descriptors are built on demand.
+ */
+
+/*
+#define STRING_MANUFACTURER            25
+#define STRING_PRODUCT                 42
+#define STRING_SERIAL                  101
+*/
+#define STRING_MANUFACTURER            1
+#define STRING_PRODUCT                 2
+#define STRING_SERIAL                  3
+
+#define STRING_SOURCE_SINK             250
+#define STRING_LOOPBACK                        251
+
+/*
+ * This device advertises two configurations; these numbers work
+ * on a pxa250 as well as more flexible hardware.
+ */
+#define        CONFIG_SOURCE_SINK      3
+#define        CONFIG_LOOPBACK         2
+
+/*
+static struct usb_device_descriptor
+device_desc = {
+       .bLength =              sizeof device_desc,
+       .bDescriptorType =      USB_DT_DEVICE,
+
+       .bcdUSB =               __constant_cpu_to_le16 (0x0200),
+       .bDeviceClass =         USB_CLASS_VENDOR_SPEC,
+
+       .idVendor =             __constant_cpu_to_le16 (DRIVER_VENDOR_NUM),
+       .idProduct =            __constant_cpu_to_le16 (DRIVER_PRODUCT_NUM),
+       .iManufacturer =        STRING_MANUFACTURER,
+       .iProduct =             STRING_PRODUCT,
+       .iSerialNumber =        STRING_SERIAL,
+       .bNumConfigurations =   2,
+};
+*/
+static struct usb_device_descriptor
+device_desc = {
+       .bLength =              sizeof device_desc,
+       .bDescriptorType =      USB_DT_DEVICE,
+       .bcdUSB =               __constant_cpu_to_le16 (0x0100),
+       .bDeviceClass =         USB_CLASS_PER_INTERFACE,
+       .bDeviceSubClass =      0,
+       .bDeviceProtocol =      0,
+       .bMaxPacketSize0 =      64,
+       .bcdDevice =            __constant_cpu_to_le16 (0x0100),
+       .idVendor =             __constant_cpu_to_le16 (0x0499),
+       .idProduct =            __constant_cpu_to_le16 (0x3002),
+       .iManufacturer =        STRING_MANUFACTURER,
+       .iProduct =             STRING_PRODUCT,
+       .iSerialNumber =        STRING_SERIAL,
+       .bNumConfigurations =   1,
+};
+
+static struct usb_config_descriptor
+z_config = {
+       .bLength =              sizeof z_config,
+       .bDescriptorType =      USB_DT_CONFIG,
+
+       /* compute wTotalLength on the fly */
+       .bNumInterfaces =       2,
+       .bConfigurationValue =  1,
+       .iConfiguration =       0,
+       .bmAttributes =         0x40,
+       .bMaxPower =            0,      /* self-powered */
+};
+
+
+static struct usb_otg_descriptor
+otg_descriptor = {
+       .bLength =              sizeof otg_descriptor,
+       .bDescriptorType =      USB_DT_OTG,
+
+       .bmAttributes =         USB_OTG_SRP,
+};
+
+/* one interface in each configuration */
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+
+/*
+ * usb 2.0 devices need to expose both high speed and full speed
+ * descriptors, unless they only run at full speed.
+ *
+ * that means alternate endpoint descriptors (bigger packets)
+ * and a "device qualifier" ... plus more construction options
+ * for the config descriptor.
+ */
+
+static struct usb_qualifier_descriptor
+dev_qualifier = {
+       .bLength =              sizeof dev_qualifier,
+       .bDescriptorType =      USB_DT_DEVICE_QUALIFIER,
+
+       .bcdUSB =               __constant_cpu_to_le16 (0x0200),
+       .bDeviceClass =         USB_CLASS_VENDOR_SPEC,
+
+       .bNumConfigurations =   2,
+};
+
+
+struct usb_cs_as_general_descriptor {
+       __u8  bLength;
+       __u8  bDescriptorType;
+
+       __u8  bDescriptorSubType;
+       __u8  bTerminalLink;
+       __u8  bDelay;
+       __u16  wFormatTag;
+} __attribute__ ((packed));
+
+struct usb_cs_as_format_descriptor {
+       __u8  bLength;
+       __u8  bDescriptorType;
+
+       __u8  bDescriptorSubType;
+       __u8  bFormatType;
+       __u8  bNrChannels;
+       __u8  bSubframeSize;
+       __u8  bBitResolution;
+       __u8  bSamfreqType;
+       __u8  tLowerSamFreq[3];
+       __u8  tUpperSamFreq[3];
+} __attribute__ ((packed));
+
+static const struct usb_interface_descriptor
+z_audio_control_if_desc = {
+       .bLength =              sizeof z_audio_control_if_desc,
+       .bDescriptorType =      USB_DT_INTERFACE,
+       .bInterfaceNumber = 0,
+       .bAlternateSetting = 0,
+       .bNumEndpoints = 0,
+       .bInterfaceClass = USB_CLASS_AUDIO,
+       .bInterfaceSubClass = 0x1,
+       .bInterfaceProtocol = 0,
+       .iInterface = 0,
+};
+
+static const struct usb_interface_descriptor
+z_audio_if_desc = {
+       .bLength =              sizeof z_audio_if_desc,
+       .bDescriptorType =      USB_DT_INTERFACE,
+       .bInterfaceNumber = 1,
+       .bAlternateSetting = 0,
+       .bNumEndpoints = 0,
+       .bInterfaceClass = USB_CLASS_AUDIO,
+       .bInterfaceSubClass = 0x2,
+       .bInterfaceProtocol = 0,
+       .iInterface = 0,
+};
+
+static const struct usb_interface_descriptor
+z_audio_if_desc2 = {
+       .bLength =              sizeof z_audio_if_desc,
+       .bDescriptorType =      USB_DT_INTERFACE,
+       .bInterfaceNumber = 1,
+       .bAlternateSetting = 1,
+       .bNumEndpoints = 1,
+       .bInterfaceClass = USB_CLASS_AUDIO,
+       .bInterfaceSubClass = 0x2,
+       .bInterfaceProtocol = 0,
+       .iInterface = 0,
+};
+
+static const struct usb_cs_as_general_descriptor
+z_audio_cs_as_if_desc = {
+       .bLength = 7,
+       .bDescriptorType = 0x24,
+
+       .bDescriptorSubType = 0x01,
+       .bTerminalLink = 0x01,
+       .bDelay = 0x0,
+       .wFormatTag = __constant_cpu_to_le16 (0x0001)
+};
+
+
+static const struct usb_cs_as_format_descriptor
+z_audio_cs_as_format_desc = {
+       .bLength = 0xe,
+       .bDescriptorType = 0x24,
+
+       .bDescriptorSubType = 2,
+       .bFormatType = 1,
+       .bNrChannels = 1,
+       .bSubframeSize = 1,
+       .bBitResolution = 8,
+       .bSamfreqType = 0,
+       .tLowerSamFreq = {0x7e, 0x13, 0x00},
+       .tUpperSamFreq = {0xe2, 0xd6, 0x00},
+};
+
+static const struct usb_endpoint_descriptor
+z_iso_ep = {
+       .bLength = 0x09,
+       .bDescriptorType = 0x05,
+       .bEndpointAddress = 0x04,
+       .bmAttributes = 0x09,
+       .wMaxPacketSize = 0x0038,
+       .bInterval = 0x01,
+       .bRefresh = 0x00,
+       .bSynchAddress = 0x00,
+};
+
+static char z_iso_ep2[] = {0x07, 0x25, 0x01, 0x00, 0x02, 0x00, 0x02};
+
+// 9 bytes
+static char z_ac_interface_header_desc[] =
+{ 0x09, 0x24, 0x01, 0x00, 0x01, 0x2b, 0x00, 0x01, 0x01 };
+
+// 12 bytes
+static char z_0[] = {0x0c, 0x24, 0x02, 0x01, 0x01, 0x01, 0x00, 0x02,
+                    0x03, 0x00, 0x00, 0x00};
+// 13 bytes
+static char z_1[] = {0x0d, 0x24, 0x06, 0x02, 0x01, 0x02, 0x15, 0x00,
+                    0x02, 0x00, 0x02, 0x00, 0x00};
+// 9 bytes
+static char z_2[] = {0x09, 0x24, 0x03, 0x03, 0x01, 0x03, 0x00, 0x02,
+                    0x00};
+
+static char za_0[] = {0x09, 0x04, 0x01, 0x02, 0x01, 0x01, 0x02, 0x00,
+                     0x00};
+
+static char za_1[] = {0x07, 0x24, 0x01, 0x01, 0x00, 0x01, 0x00};
+
+static char za_2[] = {0x0e, 0x24, 0x02, 0x01, 0x02, 0x01, 0x08, 0x00,
+                     0x7e, 0x13, 0x00, 0xe2, 0xd6, 0x00};
+
+static char za_3[] = {0x09, 0x05, 0x04, 0x09, 0x70, 0x00, 0x01, 0x00,
+                     0x00};
+
+static char za_4[] = {0x07, 0x25, 0x01, 0x00, 0x02, 0x00, 0x02};
+
+static char za_5[] = {0x09, 0x04, 0x01, 0x03, 0x01, 0x01, 0x02, 0x00,
+                     0x00};
+
+static char za_6[] = {0x07, 0x24, 0x01, 0x01, 0x00, 0x01, 0x00};
+
+static char za_7[] = {0x0e, 0x24, 0x02, 0x01, 0x01, 0x02, 0x10, 0x00,
+                     0x7e, 0x13, 0x00, 0xe2, 0xd6, 0x00};
+
+static char za_8[] = {0x09, 0x05, 0x04, 0x09, 0x70, 0x00, 0x01, 0x00,
+                     0x00};
+
+static char za_9[] = {0x07, 0x25, 0x01, 0x00, 0x02, 0x00, 0x02};
+
+static char za_10[] = {0x09, 0x04, 0x01, 0x04, 0x01, 0x01, 0x02, 0x00,
+                      0x00};
+
+static char za_11[] = {0x07, 0x24, 0x01, 0x01, 0x00, 0x01, 0x00};
+
+static char za_12[] = {0x0e, 0x24, 0x02, 0x01, 0x02, 0x02, 0x10, 0x00,
+                      0x73, 0x13, 0x00, 0xe2, 0xd6, 0x00};
+
+static char za_13[] = {0x09, 0x05, 0x04, 0x09, 0xe0, 0x00, 0x01, 0x00,
+                      0x00};
+
+static char za_14[] = {0x07, 0x25, 0x01, 0x00, 0x02, 0x00, 0x02};
+
+static char za_15[] = {0x09, 0x04, 0x01, 0x05, 0x01, 0x01, 0x02, 0x00,
+                      0x00};
+
+static char za_16[] = {0x07, 0x24, 0x01, 0x01, 0x00, 0x01, 0x00};
+
+static char za_17[] = {0x0e, 0x24, 0x02, 0x01, 0x01, 0x03, 0x14, 0x00,
+                      0x7e, 0x13, 0x00, 0xe2, 0xd6, 0x00};
+
+static char za_18[] = {0x09, 0x05, 0x04, 0x09, 0xa8, 0x00, 0x01, 0x00,
+                      0x00};
+
+static char za_19[] = {0x07, 0x25, 0x01, 0x00, 0x02, 0x00, 0x02};
+
+static char za_20[] = {0x09, 0x04, 0x01, 0x06, 0x01, 0x01, 0x02, 0x00,
+                      0x00};
+
+static char za_21[] = {0x07, 0x24, 0x01, 0x01, 0x00, 0x01, 0x00};
+
+static char za_22[] = {0x0e, 0x24, 0x02, 0x01, 0x02, 0x03, 0x14, 0x00,
+                      0x7e, 0x13, 0x00, 0xe2, 0xd6, 0x00};
+
+static char za_23[] = {0x09, 0x05, 0x04, 0x09, 0x50, 0x01, 0x01, 0x00,
+                      0x00};
+
+static char za_24[] = {0x07, 0x25, 0x01, 0x00, 0x02, 0x00, 0x02};
+
+
+
+static const struct usb_descriptor_header *z_function [] = {
+       (struct usb_descriptor_header *) &z_audio_control_if_desc,
+       (struct usb_descriptor_header *) &z_ac_interface_header_desc,
+       (struct usb_descriptor_header *) &z_0,
+       (struct usb_descriptor_header *) &z_1,
+       (struct usb_descriptor_header *) &z_2,
+       (struct usb_descriptor_header *) &z_audio_if_desc,
+       (struct usb_descriptor_header *) &z_audio_if_desc2,
+       (struct usb_descriptor_header *) &z_audio_cs_as_if_desc,
+       (struct usb_descriptor_header *) &z_audio_cs_as_format_desc,
+       (struct usb_descriptor_header *) &z_iso_ep,
+       (struct usb_descriptor_header *) &z_iso_ep2,
+       (struct usb_descriptor_header *) &za_0,
+       (struct usb_descriptor_header *) &za_1,
+       (struct usb_descriptor_header *) &za_2,
+       (struct usb_descriptor_header *) &za_3,
+       (struct usb_descriptor_header *) &za_4,
+       (struct usb_descriptor_header *) &za_5,
+       (struct usb_descriptor_header *) &za_6,
+       (struct usb_descriptor_header *) &za_7,
+       (struct usb_descriptor_header *) &za_8,
+       (struct usb_descriptor_header *) &za_9,
+       (struct usb_descriptor_header *) &za_10,
+       (struct usb_descriptor_header *) &za_11,
+       (struct usb_descriptor_header *) &za_12,
+       (struct usb_descriptor_header *) &za_13,
+       (struct usb_descriptor_header *) &za_14,
+       (struct usb_descriptor_header *) &za_15,
+       (struct usb_descriptor_header *) &za_16,
+       (struct usb_descriptor_header *) &za_17,
+       (struct usb_descriptor_header *) &za_18,
+       (struct usb_descriptor_header *) &za_19,
+       (struct usb_descriptor_header *) &za_20,
+       (struct usb_descriptor_header *) &za_21,
+       (struct usb_descriptor_header *) &za_22,
+       (struct usb_descriptor_header *) &za_23,
+       (struct usb_descriptor_header *) &za_24,
+       NULL,
+};
+
+/* maxpacket and other transfer characteristics vary by speed. */
+#define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs))
+
+#else
+
+/* if there's no high speed support, maxpacket doesn't change. */
+#define ep_desc(g,hs,fs) fs
+
+#endif /* !CONFIG_USB_GADGET_DUALSPEED */
+
+static char                            manufacturer [40];
+//static char                          serial [40];
+static char                            serial [] = "Ser 00 em";
+
+/* static strings, in UTF-8 */
+static struct usb_string               strings [] = {
+       { STRING_MANUFACTURER, manufacturer, },
+       { STRING_PRODUCT, longname, },
+       { STRING_SERIAL, serial, },
+       { STRING_LOOPBACK, loopback, },
+       { STRING_SOURCE_SINK, source_sink, },
+       {  }                    /* end of list */
+};
+
+static struct usb_gadget_strings       stringtab = {
+       .language       = 0x0409,       /* en-us */
+       .strings        = strings,
+};
+
+/*
+ * config descriptors are also handcrafted.  these must agree with code
+ * that sets configurations, and with code managing interfaces and their
+ * altsettings.  other complexity may come from:
+ *
+ *  - high speed support, including "other speed config" rules
+ *  - multiple configurations
+ *  - interfaces with alternate settings
+ *  - embedded class or vendor-specific descriptors
+ *
+ * this handles high speed, and has a second config that could as easily
+ * have been an alternate interface setting (on most hardware).
+ *
+ * NOTE:  to demonstrate (and test) more USB capabilities, this driver
+ * should include an altsetting to test interrupt transfers, including
+ * high bandwidth modes at high speed.  (Maybe work like Intel's test
+ * device?)
+ */
+static int
+config_buf (struct usb_gadget *gadget, u8 *buf, u8 type, unsigned index)
+{
+       int len;
+       const struct usb_descriptor_header **function;
+
+       function = z_function;
+       len = usb_gadget_config_buf (&z_config, buf, USB_BUFSIZ, function);
+       if (len < 0)
+               return len;
+       ((struct usb_config_descriptor *) buf)->bDescriptorType = type;
+       return len;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_request *
+alloc_ep_req (struct usb_ep *ep, unsigned length)
+{
+       struct usb_request      *req;
+
+       req = usb_ep_alloc_request (ep, GFP_ATOMIC);
+       if (req) {
+               req->length = length;
+               req->buf = usb_ep_alloc_buffer (ep, length,
+                               &req->dma, GFP_ATOMIC);
+               if (!req->buf) {
+                       usb_ep_free_request (ep, req);
+                       req = NULL;
+               }
+       }
+       return req;
+}
+
+static void free_ep_req (struct usb_ep *ep, struct usb_request *req)
+{
+       if (req->buf)
+               usb_ep_free_buffer (ep, req->buf, req->dma, req->length);
+       usb_ep_free_request (ep, req);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* optionally require specific source/sink data patterns  */
+
+static int
+check_read_data (
+       struct zero_dev         *dev,
+       struct usb_ep           *ep,
+       struct usb_request      *req
+)
+{
+       unsigned        i;
+       u8              *buf = req->buf;
+
+       for (i = 0; i < req->actual; i++, buf++) {
+               switch (pattern) {
+               /* all-zeroes has no synchronization issues */
+               case 0:
+                       if (*buf == 0)
+                               continue;
+                       break;
+               /* mod63 stays in sync with short-terminated transfers,
+                * or otherwise when host and gadget agree on how large
+                * each usb transfer request should be.  resync is done
+                * with set_interface or set_config.
+                */
+               case 1:
+                       if (*buf == (u8)(i % 63))
+                               continue;
+                       break;
+               }
+               ERROR (dev, "bad OUT byte, buf [%d] = %d\n", i, *buf);
+               usb_ep_set_halt (ep);
+               return -EINVAL;
+       }
+       return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void zero_reset_config (struct zero_dev *dev)
+{
+       if (dev->config == 0)
+               return;
+
+       DBG (dev, "reset config\n");
+
+       /* just disable endpoints, forcing completion of pending i/o.
+        * all our completion handlers free their requests in this case.
+        */
+       if (dev->in_ep) {
+               usb_ep_disable (dev->in_ep);
+               dev->in_ep = NULL;
+       }
+       if (dev->out_ep) {
+               usb_ep_disable (dev->out_ep);
+               dev->out_ep = NULL;
+       }
+       dev->config = 0;
+       del_timer (&dev->resume);
+}
+
+#define _write(f, buf, sz) (f->f_op->write(f, buf, sz, &f->f_pos))
+
+static void
+zero_isoc_complete (struct usb_ep *ep, struct usb_request *req)
+{
+       struct zero_dev *dev = ep->driver_data;
+       int             status = req->status;
+       int i, j;
+
+       switch (status) {
+
+       case 0:                         /* normal completion? */
+               //printk ("\nzero ---------------> isoc normal completion %d bytes\n", req->actual);
+               for (i=0, j=rbuf_start; i<req->actual; i++) {
+                       //printk ("%02x ", ((__u8*)req->buf)[i]);
+                       rbuf[j] = ((__u8*)req->buf)[i];
+                       j++;
+                       if (j >= RBUF_LEN) j=0;
+               }
+               rbuf_start = j;
+               //printk ("\n\n");
+
+               if (rbuf_len < RBUF_LEN) {
+                       rbuf_len += req->actual;
+                       if (rbuf_len > RBUF_LEN) {
+                               rbuf_len = RBUF_LEN;
+                       }
+               }
+
+               break;
+
+       /* this endpoint is normally active while we're configured */
+       case -ECONNABORTED:             /* hardware forced ep reset */
+       case -ECONNRESET:               /* request dequeued */
+       case -ESHUTDOWN:                /* disconnect from host */
+               VDBG (dev, "%s gone (%d), %d/%d\n", ep->name, status,
+                               req->actual, req->length);
+               if (ep == dev->out_ep)
+                       check_read_data (dev, ep, req);
+               free_ep_req (ep, req);
+               return;
+
+       case -EOVERFLOW:                /* buffer overrun on read means that
+                                        * we didn't provide a big enough
+                                        * buffer.
+                                        */
+       default:
+#if 1
+               DBG (dev, "%s complete --> %d, %d/%d\n", ep->name,
+                               status, req->actual, req->length);
+#endif
+       case -EREMOTEIO:                /* short read */
+               break;
+       }
+
+       status = usb_ep_queue (ep, req, GFP_ATOMIC);
+       if (status) {
+               ERROR (dev, "kill %s:  resubmit %d bytes --> %d\n",
+                               ep->name, req->length, status);
+               usb_ep_set_halt (ep);
+               /* FIXME recover later ... somehow */
+       }
+}
+
+static struct usb_request *
+zero_start_isoc_ep (struct usb_ep *ep, int gfp_flags)
+{
+       struct usb_request      *req;
+       int                     status;
+
+       req = alloc_ep_req (ep, 512);
+       if (!req)
+               return NULL;
+
+       req->complete = zero_isoc_complete;
+
+       status = usb_ep_queue (ep, req, gfp_flags);
+       if (status) {
+               struct zero_dev *dev = ep->driver_data;
+
+               ERROR (dev, "start %s --> %d\n", ep->name, status);
+               free_ep_req (ep, req);
+               req = NULL;
+       }
+
+       return req;
+}
+
+/* change our operational config.  this code must agree with the code
+ * that returns config descriptors, and altsetting code.
+ *
+ * it's also responsible for power management interactions. some
+ * configurations might not work with our current power sources.
+ *
+ * note that some device controller hardware will constrain what this
+ * code can do, perhaps by disallowing more than one configuration or
+ * by limiting configuration choices (like the pxa2xx).
+ */
+static int
+zero_set_config (struct zero_dev *dev, unsigned number, int gfp_flags)
+{
+       int                     result = 0;
+       struct usb_gadget       *gadget = dev->gadget;
+       const struct usb_endpoint_descriptor    *d;
+       struct usb_ep           *ep;
+
+       if (number == dev->config)
+               return 0;
+
+       zero_reset_config (dev);
+
+       gadget_for_each_ep (ep, gadget) {
+
+               if (strcmp (ep->name, "ep4") == 0) {
+
+                       d = (struct usb_endpoint_descripter *)&za_23; // isoc ep desc for audio i/f alt setting 6
+                       result = usb_ep_enable (ep, d);
+
+                       if (result == 0) {
+                               ep->driver_data = dev;
+                               dev->in_ep = ep;
+
+                               if (zero_start_isoc_ep (ep, gfp_flags) != 0) {
+
+                                       dev->in_ep = ep;
+                                       continue;
+                               }
+
+                               usb_ep_disable (ep);
+                               result = -EIO;
+                       }
+               }
+
+       }
+
+       dev->config = number;
+       return result;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void zero_setup_complete (struct usb_ep *ep, struct usb_request *req)
+{
+       if (req->status || req->actual != req->length)
+               DBG ((struct zero_dev *) ep->driver_data,
+                               "setup complete --> %d, %d/%d\n",
+                               req->status, req->actual, req->length);
+}
+
+/*
+ * The setup() callback implements all the ep0 functionality that's
+ * not handled lower down, in hardware or the hardware driver (like
+ * device and endpoint feature flags, and their status).  It's all
+ * housekeeping for the gadget function we're implementing.  Most of
+ * the work is in config-specific setup.
+ */
+static int
+zero_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
+{
+       struct zero_dev         *dev = get_gadget_data (gadget);
+       struct usb_request      *req = dev->req;
+       int                     value = -EOPNOTSUPP;
+
+       /* usually this stores reply data in the pre-allocated ep0 buffer,
+        * but config change events will reconfigure hardware.
+        */
+       req->zero = 0;
+       switch (ctrl->bRequest) {
+
+       case USB_REQ_GET_DESCRIPTOR:
+
+               switch (ctrl->wValue >> 8) {
+
+               case USB_DT_DEVICE:
+                       value = min (ctrl->wLength, (u16) sizeof device_desc);
+                       memcpy (req->buf, &device_desc, value);
+                       break;
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+               case USB_DT_DEVICE_QUALIFIER:
+                       if (!gadget->is_dualspeed)
+                               break;
+                       value = min (ctrl->wLength, (u16) sizeof dev_qualifier);
+                       memcpy (req->buf, &dev_qualifier, value);
+                       break;
+
+               case USB_DT_OTHER_SPEED_CONFIG:
+                       if (!gadget->is_dualspeed)
+                               break;
+                       // FALLTHROUGH
+#endif /* CONFIG_USB_GADGET_DUALSPEED */
+               case USB_DT_CONFIG:
+                       value = config_buf (gadget, req->buf,
+                                       ctrl->wValue >> 8,
+                                       ctrl->wValue & 0xff);
+                       if (value >= 0)
+                               value = min (ctrl->wLength, (u16) value);
+                       break;
+
+               case USB_DT_STRING:
+                       /* wIndex == language code.
+                        * this driver only handles one language, you can
+                        * add string tables for other languages, using
+                        * any UTF-8 characters
+                        */
+                       value = usb_gadget_get_string (&stringtab,
+                                       ctrl->wValue & 0xff, req->buf);
+                       if (value >= 0) {
+                               value = min (ctrl->wLength, (u16) value);
+                       }
+                       break;
+               }
+               break;
+
+       /* currently two configs, two speeds */
+       case USB_REQ_SET_CONFIGURATION:
+               if (ctrl->bRequestType != 0)
+                       goto unknown;
+
+               spin_lock (&dev->lock);
+               value = zero_set_config (dev, ctrl->wValue, GFP_ATOMIC);
+               spin_unlock (&dev->lock);
+               break;
+       case USB_REQ_GET_CONFIGURATION:
+               if (ctrl->bRequestType != USB_DIR_IN)
+                       goto unknown;
+               *(u8 *)req->buf = dev->config;
+               value = min (ctrl->wLength, (u16) 1);
+               break;
+
+       /* until we add altsetting support, or other interfaces,
+        * only 0/0 are possible.  pxa2xx only supports 0/0 (poorly)
+        * and already killed pending endpoint I/O.
+        */
+       case USB_REQ_SET_INTERFACE:
+
+               if (ctrl->bRequestType != USB_RECIP_INTERFACE)
+                       goto unknown;
+               spin_lock (&dev->lock);
+               if (dev->config) {
+                       u8              config = dev->config;
+
+                       /* resets interface configuration, forgets about
+                        * previous transaction state (queued bufs, etc)
+                        * and re-inits endpoint state (toggle etc)
+                        * no response queued, just zero status == success.
+                        * if we had more than one interface we couldn't
+                        * use this "reset the config" shortcut.
+                        */
+                       zero_reset_config (dev);
+                       zero_set_config (dev, config, GFP_ATOMIC);
+                       value = 0;
+               }
+               spin_unlock (&dev->lock);
+               break;
+       case USB_REQ_GET_INTERFACE:
+               if ((ctrl->bRequestType == 0x21) && (ctrl->wIndex == 0x02)) {
+                       value = ctrl->wLength;
+                       break;
+               }
+               else {
+                       if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE))
+                               goto unknown;
+                       if (!dev->config)
+                               break;
+                       if (ctrl->wIndex != 0) {
+                               value = -EDOM;
+                               break;
+                       }
+                       *(u8 *)req->buf = 0;
+                       value = min (ctrl->wLength, (u16) 1);
+               }
+               break;
+
+       /*
+        * These are the same vendor-specific requests supported by
+        * Intel's USB 2.0 compliance test devices.  We exceed that
+        * device spec by allowing multiple-packet requests.
+        */
+       case 0x5b:      /* control WRITE test -- fill the buffer */
+               if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
+                       goto unknown;
+               if (ctrl->wValue || ctrl->wIndex)
+                       break;
+               /* just read that many bytes into the buffer */
+               if (ctrl->wLength > USB_BUFSIZ)
+                       break;
+               value = ctrl->wLength;
+               break;
+       case 0x5c:      /* control READ test -- return the buffer */
+               if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
+                       goto unknown;
+               if (ctrl->wValue || ctrl->wIndex)
+                       break;
+               /* expect those bytes are still in the buffer; send back */
+               if (ctrl->wLength > USB_BUFSIZ
+                               || ctrl->wLength != req->length)
+                       break;
+               value = ctrl->wLength;
+               break;
+
+       case 0x01: // SET_CUR
+       case 0x02:
+       case 0x03:
+       case 0x04:
+       case 0x05:
+               value = ctrl->wLength;
+               break;
+       case 0x81:
+               switch (ctrl->wValue) {
+               case 0x0201:
+               case 0x0202:
+                       ((u8*)req->buf)[0] = 0x00;
+                       ((u8*)req->buf)[1] = 0xe3;
+                       break;
+               case 0x0300:
+               case 0x0500:
+                       ((u8*)req->buf)[0] = 0x00;
+                       break;
+               }
+               //((u8*)req->buf)[0] = 0x81;
+               //((u8*)req->buf)[1] = 0x81;
+               value = ctrl->wLength;
+               break;
+       case 0x82:
+               switch (ctrl->wValue) {
+               case 0x0201:
+               case 0x0202:
+                       ((u8*)req->buf)[0] = 0x00;
+                       ((u8*)req->buf)[1] = 0xc3;
+                       break;
+               case 0x0300:
+               case 0x0500:
+                       ((u8*)req->buf)[0] = 0x00;
+                       break;
+               }
+               //((u8*)req->buf)[0] = 0x82;
+               //((u8*)req->buf)[1] = 0x82;
+               value = ctrl->wLength;
+               break;
+       case 0x83:
+               switch (ctrl->wValue) {
+               case 0x0201:
+               case 0x0202:
+                       ((u8*)req->buf)[0] = 0x00;
+                       ((u8*)req->buf)[1] = 0x00;
+                       break;
+               case 0x0300:
+                       ((u8*)req->buf)[0] = 0x60;
+                       break;
+               case 0x0500:
+                       ((u8*)req->buf)[0] = 0x18;
+                       break;
+               }
+               //((u8*)req->buf)[0] = 0x83;
+               //((u8*)req->buf)[1] = 0x83;
+               value = ctrl->wLength;
+               break;
+       case 0x84:
+               switch (ctrl->wValue) {
+               case 0x0201:
+               case 0x0202:
+                       ((u8*)req->buf)[0] = 0x00;
+                       ((u8*)req->buf)[1] = 0x01;
+                       break;
+               case 0x0300:
+               case 0x0500:
+                       ((u8*)req->buf)[0] = 0x08;
+                       break;
+               }
+               //((u8*)req->buf)[0] = 0x84;
+               //((u8*)req->buf)[1] = 0x84;
+               value = ctrl->wLength;
+               break;
+       case 0x85:
+               ((u8*)req->buf)[0] = 0x85;
+               ((u8*)req->buf)[1] = 0x85;
+               value = ctrl->wLength;
+               break;
+
+
+       default:
+unknown:
+               printk("unknown control req%02x.%02x v%04x i%04x l%d\n",
+                       ctrl->bRequestType, ctrl->bRequest,
+                       ctrl->wValue, ctrl->wIndex, ctrl->wLength);
+       }
+
+       /* respond with data transfer before status phase? */
+       if (value >= 0) {
+               req->length = value;
+               req->zero = value < ctrl->wLength
+                               && (value % gadget->ep0->maxpacket) == 0;
+               value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
+               if (value < 0) {
+                       DBG (dev, "ep_queue < 0 --> %d\n", value);
+                       req->status = 0;
+                       zero_setup_complete (gadget->ep0, req);
+               }
+       }
+
+       /* device either stalls (value < 0) or reports success */
+       return value;
+}
+
+static void
+zero_disconnect (struct usb_gadget *gadget)
+{
+       struct zero_dev         *dev = get_gadget_data (gadget);
+       unsigned long           flags;
+
+       spin_lock_irqsave (&dev->lock, flags);
+       zero_reset_config (dev);
+
+       /* a more significant application might have some non-usb
+        * activities to quiesce here, saving resources like power
+        * or pushing the notification up a network stack.
+        */
+       spin_unlock_irqrestore (&dev->lock, flags);
+
+       /* next we may get setup() calls to enumerate new connections;
+        * or an unbind() during shutdown (including removing module).
+        */
+}
+
+static void
+zero_autoresume (unsigned long _dev)
+{
+       struct zero_dev *dev = (struct zero_dev *) _dev;
+       int             status;
+
+       /* normally the host would be woken up for something
+        * more significant than just a timer firing...
+        */
+       if (dev->gadget->speed != USB_SPEED_UNKNOWN) {
+               status = usb_gadget_wakeup (dev->gadget);
+               DBG (dev, "wakeup --> %d\n", status);
+       }
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void
+zero_unbind (struct usb_gadget *gadget)
+{
+       struct zero_dev         *dev = get_gadget_data (gadget);
+
+       DBG (dev, "unbind\n");
+
+       /* we've already been disconnected ... no i/o is active */
+       if (dev->req)
+               free_ep_req (gadget->ep0, dev->req);
+       del_timer_sync (&dev->resume);
+       kfree (dev);
+       set_gadget_data (gadget, NULL);
+}
+
+static int
+zero_bind (struct usb_gadget *gadget)
+{
+       struct zero_dev         *dev;
+       //struct usb_ep         *ep;
+
+       printk("binding\n");
+       /*
+        * DRIVER POLICY CHOICE:  you may want to do this differently.
+        * One thing to avoid is reusing a bcdDevice revision code
+        * with different host-visible configurations or behavior
+        * restrictions -- using ep1in/ep2out vs ep1out/ep3in, etc
+        */
+       //device_desc.bcdDevice = __constant_cpu_to_le16 (0x0201);
+
+
+       /* ok, we made sense of the hardware ... */
+       dev = kzalloc (sizeof *dev, SLAB_KERNEL);
+       if (!dev)
+               return -ENOMEM;
+       spin_lock_init (&dev->lock);
+       dev->gadget = gadget;
+       set_gadget_data (gadget, dev);
+
+       /* preallocate control response and buffer */
+       dev->req = usb_ep_alloc_request (gadget->ep0, GFP_KERNEL);
+       if (!dev->req)
+               goto enomem;
+       dev->req->buf = usb_ep_alloc_buffer (gadget->ep0, USB_BUFSIZ,
+                               &dev->req->dma, GFP_KERNEL);
+       if (!dev->req->buf)
+               goto enomem;
+
+       dev->req->complete = zero_setup_complete;
+
+       device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
+
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+       /* assume ep0 uses the same value for both speeds ... */
+       dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
+
+       /* and that all endpoints are dual-speed */
+       //hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
+       //hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
+#endif
+
+       usb_gadget_set_selfpowered (gadget);
+
+       init_timer (&dev->resume);
+       dev->resume.function = zero_autoresume;
+       dev->resume.data = (unsigned long) dev;
+
+       gadget->ep0->driver_data = dev;
+
+       INFO (dev, "%s, version: " DRIVER_VERSION "\n", longname);
+       INFO (dev, "using %s, OUT %s IN %s\n", gadget->name,
+               EP_OUT_NAME, EP_IN_NAME);
+
+       snprintf (manufacturer, sizeof manufacturer,
+               UTS_SYSNAME " " UTS_RELEASE " with %s",
+               gadget->name);
+
+       return 0;
+
+enomem:
+       zero_unbind (gadget);
+       return -ENOMEM;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void
+zero_suspend (struct usb_gadget *gadget)
+{
+       struct zero_dev         *dev = get_gadget_data (gadget);
+
+       if (gadget->speed == USB_SPEED_UNKNOWN)
+               return;
+
+       if (autoresume) {
+               mod_timer (&dev->resume, jiffies + (HZ * autoresume));
+               DBG (dev, "suspend, wakeup in %d seconds\n", autoresume);
+       } else
+               DBG (dev, "suspend\n");
+}
+
+static void
+zero_resume (struct usb_gadget *gadget)
+{
+       struct zero_dev         *dev = get_gadget_data (gadget);
+
+       DBG (dev, "resume\n");
+       del_timer (&dev->resume);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_gadget_driver zero_driver = {
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+       .speed          = USB_SPEED_HIGH,
+#else
+       .speed          = USB_SPEED_FULL,
+#endif
+       .function       = (char *) longname,
+       .bind           = zero_bind,
+       .unbind         = zero_unbind,
+
+       .setup          = zero_setup,
+       .disconnect     = zero_disconnect,
+
+       .suspend        = zero_suspend,
+       .resume         = zero_resume,
+
+       .driver         = {
+               .name           = (char *) shortname,
+               // .shutdown = ...
+               // .suspend = ...
+               // .resume = ...
+       },
+};
+
+MODULE_AUTHOR ("David Brownell");
+MODULE_LICENSE ("Dual BSD/GPL");
+
+static struct proc_dir_entry *pdir, *pfile;
+
+static int isoc_read_data (char *page, char **start,
+                          off_t off, int count,
+                          int *eof, void *data)
+{
+       int i;
+       static int c = 0;
+       static int done = 0;
+       static int s = 0;
+
+/*
+       printk ("\ncount: %d\n", count);
+       printk ("rbuf_start: %d\n", rbuf_start);
+       printk ("rbuf_len: %d\n", rbuf_len);
+       printk ("off: %d\n", off);
+       printk ("start: %p\n\n", *start);
+*/
+       if (done) {
+               c = 0;
+               done = 0;
+               *eof = 1;
+               return 0;
+       }
+
+       if (c == 0) {
+               if (rbuf_len == RBUF_LEN)
+                       s = rbuf_start;
+               else s = 0;
+       }
+
+       for (i=0; i<count && c<rbuf_len; i++, c++) {
+               page[i] = rbuf[(c+s) % RBUF_LEN];
+       }
+       *start = page;
+
+       if (c >= rbuf_len) {
+               *eof = 1;
+               done = 1;
+       }
+
+
+       return i;
+}
+
+static int __init init (void)
+{
+
+       int retval = 0;
+
+       pdir = proc_mkdir("isoc_test", NULL);
+       if(pdir == NULL) {
+               retval = -ENOMEM;
+               printk("Error creating dir\n");
+               goto done;
+       }
+       pdir->owner = THIS_MODULE;
+
+       pfile = create_proc_read_entry("isoc_data",
+                                      0444, pdir,
+                                      isoc_read_data,
+                                      NULL);
+       if (pfile == NULL) {
+               retval = -ENOMEM;
+               printk("Error creating file\n");
+               goto no_file;
+       }
+       pfile->owner = THIS_MODULE;
+
+       return usb_gadget_register_driver (&zero_driver);
+
+ no_file:
+       remove_proc_entry("isoc_data", NULL);
+ done:
+       return retval;
+}
+module_init (init);
+
+static void __exit cleanup (void)
+{
+
+       usb_gadget_unregister_driver (&zero_driver);
+
+       remove_proc_entry("isoc_data", pdir);
+       remove_proc_entry("isoc_test", NULL);
+}
+module_exit (cleanup);
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_cfi_common.h
@@ -0,0 +1,142 @@
+/* ==========================================================================
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+#if !defined(__DWC_CFI_COMMON_H__)
+#define __DWC_CFI_COMMON_H__
+
+//#include <linux/types.h>
+
+/**
+ * @file
+ *
+ * This file contains the CFI specific common constants, interfaces
+ * (functions and macros) and structures for Linux. No PCD specific
+ * data structure or definition is to be included in this file.
+ *
+ */
+
+/** This is a request for all Core Features */
+#define VEN_CORE_GET_FEATURES          0xB1
+
+/** This is a request to get the value of a specific Core Feature */
+#define VEN_CORE_GET_FEATURE           0xB2
+
+/** This command allows the host to set the value of a specific Core Feature */
+#define VEN_CORE_SET_FEATURE           0xB3
+
+/** This command allows the host to set the default values of
+ * either all or any specific Core Feature
+ */
+#define VEN_CORE_RESET_FEATURES                0xB4
+
+/** This command forces the PCD to write the deferred values of a Core Features */
+#define VEN_CORE_ACTIVATE_FEATURES     0xB5
+
+/** This request reads a DWORD value from a register at the specified offset */
+#define VEN_CORE_READ_REGISTER         0xB6
+
+/** This request writes a DWORD value into a register at the specified offset */
+#define VEN_CORE_WRITE_REGISTER                0xB7
+
+/** This structure is the header of the Core Features dataset returned to
+ *  the Host
+ */
+struct cfi_all_features_header {
+/** The features header structure length is */
+#define CFI_ALL_FEATURES_HDR_LEN               8
+       /**
+        * The total length of the features dataset returned to the Host
+        */
+       uint16_t wTotalLen;
+
+       /**
+        * CFI version number inBinary-Coded Decimal (i.e., 1.00 is 100H).
+        * This field identifies the version of the CFI Specification with which
+        * the device is compliant.
+        */
+       uint16_t wVersion;
+
+       /** The ID of the Core */
+       uint16_t wCoreID;
+#define CFI_CORE_ID_UDC                1
+#define CFI_CORE_ID_OTG                2
+#define CFI_CORE_ID_WUDEV      3
+
+       /** Number of features returned by VEN_CORE_GET_FEATURES request */
+       uint16_t wNumFeatures;
+} UPACKED;
+
+typedef struct cfi_all_features_header cfi_all_features_header_t;
+
+/** This structure is a header of the Core Feature descriptor dataset returned to
+ *  the Host after the VEN_CORE_GET_FEATURES request
+ */
+struct cfi_feature_desc_header {
+#define CFI_FEATURE_DESC_HDR_LEN       8
+
+       /** The feature ID */
+       uint16_t wFeatureID;
+
+       /** Length of this feature descriptor in bytes - including the
+        * length of the feature name string
+        */
+       uint16_t wLength;
+
+       /** The data length of this feature in bytes */
+       uint16_t wDataLength;
+
+       /**
+        * Attributes of this features
+        * D0: Access rights
+        * 0 - Read/Write
+        * 1 - Read only
+        */
+       uint8_t bmAttributes;
+#define CFI_FEATURE_ATTR_RO            1
+#define CFI_FEATURE_ATTR_RW            0
+
+       /** Length of the feature name in bytes */
+       uint8_t bNameLen;
+
+       /** The feature name buffer */
+       //uint8_t *name;
+} UPACKED;
+
+typedef struct cfi_feature_desc_header cfi_feature_desc_header_t;
+
+/**
+ * This structure describes a NULL terminated string referenced by its id field.
+ * It is very similar to usb_string structure but has the id field type set to 16-bit.
+ */
+struct cfi_string {
+       uint16_t id;
+       const uint8_t *s;
+};
+typedef struct cfi_string cfi_string_t;
+
+#endif
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_adp.c
@@ -0,0 +1,854 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_adp.c $
+ * $Revision: #12 $
+ * $Date: 2011/10/26 $
+ * $Change: 1873028 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+#include "dwc_os.h"
+#include "dwc_otg_regs.h"
+#include "dwc_otg_cil.h"
+#include "dwc_otg_adp.h"
+
+/** @file
+ *
+ * This file contains the most of the Attach Detect Protocol implementation for
+ * the driver to support OTG Rev2.0.
+ *
+ */
+
+void dwc_otg_adp_write_reg(dwc_otg_core_if_t * core_if, uint32_t value)
+{
+       adpctl_data_t adpctl;
+
+       adpctl.d32 = value;
+       adpctl.b.ar = 0x2;
+
+       DWC_WRITE_REG32(&core_if->core_global_regs->adpctl, adpctl.d32);
+
+       while (adpctl.b.ar) {
+               adpctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->adpctl);
+       }
+
+}
+
+/**
+ * Function is called to read ADP registers
+ */
+uint32_t dwc_otg_adp_read_reg(dwc_otg_core_if_t * core_if)
+{
+       adpctl_data_t adpctl;
+
+       adpctl.d32 = 0;
+       adpctl.b.ar = 0x1;
+
+       DWC_WRITE_REG32(&core_if->core_global_regs->adpctl, adpctl.d32);
+
+       while (adpctl.b.ar) {
+               adpctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->adpctl);
+       }
+
+       return adpctl.d32;
+}
+
+/**
+ * Function is called to read ADPCTL register and filter Write-clear bits
+ */
+uint32_t dwc_otg_adp_read_reg_filter(dwc_otg_core_if_t * core_if)
+{
+       adpctl_data_t adpctl;
+
+       adpctl.d32 = dwc_otg_adp_read_reg(core_if);
+       adpctl.b.adp_tmout_int = 0;
+       adpctl.b.adp_prb_int = 0;
+       adpctl.b.adp_tmout_int = 0;
+
+       return adpctl.d32;
+}
+
+/**
+ * Function is called to write ADP registers
+ */
+void dwc_otg_adp_modify_reg(dwc_otg_core_if_t * core_if, uint32_t clr,
+                           uint32_t set)
+{
+       dwc_otg_adp_write_reg(core_if,
+                             (dwc_otg_adp_read_reg(core_if) & (~clr)) | set);
+}
+
+static void adp_sense_timeout(void *ptr)
+{
+       dwc_otg_core_if_t *core_if = (dwc_otg_core_if_t *) ptr;
+       core_if->adp.sense_timer_started = 0;
+       DWC_PRINTF("ADP SENSE TIMEOUT\n");
+       if (core_if->adp_enable) {
+               dwc_otg_adp_sense_stop(core_if);
+               dwc_otg_adp_probe_start(core_if);
+       }
+}
+
+/**
+ * This function is called when the ADP vbus timer expires. Timeout is 1.1s.
+ */
+static void adp_vbuson_timeout(void *ptr)
+{
+       gpwrdn_data_t gpwrdn;
+       dwc_otg_core_if_t *core_if = (dwc_otg_core_if_t *) ptr;
+       hprt0_data_t hprt0 = {.d32 = 0 };
+       pcgcctl_data_t pcgcctl = {.d32 = 0 };
+       DWC_PRINTF("%s: 1.1 seconds expire after turning on VBUS\n",__FUNCTION__);
+       if (core_if) {
+               core_if->adp.vbuson_timer_started = 0;
+               /* Turn off vbus */
+               hprt0.b.prtpwr = 1;
+               DWC_MODIFY_REG32(core_if->host_if->hprt0, hprt0.d32, 0);
+               gpwrdn.d32 = 0;
+
+               /* Power off the core */
+               if (core_if->power_down == 2) {
+                       /* Enable Wakeup Logic */
+//                      gpwrdn.b.wkupactiv = 1;
+                       gpwrdn.b.pmuactv = 0;
+                       gpwrdn.b.pwrdnrstn = 1;
+                       gpwrdn.b.pwrdnclmp = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0,
+                                        gpwrdn.d32);
+
+                       /* Suspend the Phy Clock */
+                       pcgcctl.b.stoppclk = 1;
+                       DWC_MODIFY_REG32(core_if->pcgcctl, 0, pcgcctl.d32);
+
+                       /* Switch on VDD */
+//                      gpwrdn.b.wkupactiv = 1;
+                       gpwrdn.b.pmuactv = 1;
+                       gpwrdn.b.pwrdnrstn = 1;
+                       gpwrdn.b.pwrdnclmp = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0,
+                                        gpwrdn.d32);
+               } else {
+                       /* Enable Power Down Logic */
+                       gpwrdn.b.pmuintsel = 1;
+                       gpwrdn.b.pmuactv = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+               }
+
+               /* Power off the core */
+               if (core_if->power_down == 2) {
+                       gpwrdn.d32 = 0;
+                       gpwrdn.b.pwrdnswtch = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn,
+                                        gpwrdn.d32, 0);
+               }
+
+               /* Unmask SRP detected interrupt from Power Down Logic */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.srp_det_msk = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+
+               dwc_otg_adp_probe_start(core_if);
+               dwc_otg_dump_global_registers(core_if);
+               dwc_otg_dump_host_registers(core_if);
+       }
+
+}
+
+/**
+ * Start the ADP Initial Probe timer to detect if Port Connected interrupt is
+ * not asserted within 1.1 seconds.
+ *
+ * @param core_if the pointer to core_if strucure.
+ */
+void dwc_otg_adp_vbuson_timer_start(dwc_otg_core_if_t * core_if)
+{
+       core_if->adp.vbuson_timer_started = 1;
+       if (core_if->adp.vbuson_timer)
+       {
+               DWC_PRINTF("SCHEDULING VBUSON TIMER\n");
+               /* 1.1 secs + 60ms necessary for cil_hcd_start*/
+               DWC_TIMER_SCHEDULE(core_if->adp.vbuson_timer, 1160);
+       } else {
+               DWC_WARN("VBUSON_TIMER = %p\n",core_if->adp.vbuson_timer);
+       }
+}
+
+#if 0
+/**
+ * Masks all DWC OTG core interrupts
+ *
+ */
+static void mask_all_interrupts(dwc_otg_core_if_t * core_if)
+{
+       int i;
+       gahbcfg_data_t ahbcfg = {.d32 = 0 };
+
+       /* Mask Host Interrupts */
+
+       /* Clear and disable HCINTs */
+       for (i = 0; i < core_if->core_params->host_channels; i++) {
+               DWC_WRITE_REG32(&core_if->host_if->hc_regs[i]->hcintmsk, 0);
+               DWC_WRITE_REG32(&core_if->host_if->hc_regs[i]->hcint, 0xFFFFFFFF);
+
+       }
+
+       /* Clear and disable HAINT */
+       DWC_WRITE_REG32(&core_if->host_if->host_global_regs->haintmsk, 0x0000);
+       DWC_WRITE_REG32(&core_if->host_if->host_global_regs->haint, 0xFFFFFFFF);
+
+       /* Mask Device Interrupts */
+       if (!core_if->multiproc_int_enable) {
+               /* Clear and disable IN Endpoint interrupts */
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->diepmsk, 0);
+               for (i = 0; i <= core_if->dev_if->num_in_eps; i++) {
+                       DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[i]->
+                                       diepint, 0xFFFFFFFF);
+               }
+
+               /* Clear and disable OUT Endpoint interrupts */
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->doepmsk, 0);
+               for (i = 0; i <= core_if->dev_if->num_out_eps; i++) {
+                       DWC_WRITE_REG32(&core_if->dev_if->out_ep_regs[i]->
+                                       doepint, 0xFFFFFFFF);
+               }
+
+               /* Clear and disable DAINT */
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->daint,
+                               0xFFFFFFFF);
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->daintmsk, 0);
+       } else {
+               for (i = 0; i < core_if->dev_if->num_in_eps; ++i) {
+                       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->
+                                       diepeachintmsk[i], 0);
+                       DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[i]->
+                                       diepint, 0xFFFFFFFF);
+               }
+
+               for (i = 0; i < core_if->dev_if->num_out_eps; ++i) {
+                       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->
+                                       doepeachintmsk[i], 0);
+                       DWC_WRITE_REG32(&core_if->dev_if->out_ep_regs[i]->
+                                       doepint, 0xFFFFFFFF);
+               }
+
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->deachintmsk,
+                               0);
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->deachint,
+                               0xFFFFFFFF);
+
+       }
+
+       /* Disable interrupts */
+       ahbcfg.b.glblintrmsk = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gahbcfg, ahbcfg.d32, 0);
+
+       /* Disable all interrupts. */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, 0);
+
+       /* Clear any pending interrupts */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+
+       /* Clear any pending OTG Interrupts */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gotgint, 0xFFFFFFFF);
+}
+
+/**
+ * Unmask Port Connection Detected interrupt
+ *
+ */
+static void unmask_conn_det_intr(dwc_otg_core_if_t * core_if)
+{
+       gintmsk_data_t gintmsk = {.d32 = 0,.b.portintr = 1 };
+
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, gintmsk.d32);
+}
+#endif
+
+/**
+ * Starts the ADP Probing
+ *
+ * @param core_if the pointer to core_if structure.
+ */
+uint32_t dwc_otg_adp_probe_start(dwc_otg_core_if_t * core_if)
+{
+
+       adpctl_data_t adpctl = {.d32 = 0};
+       gpwrdn_data_t gpwrdn;
+#if 0
+       adpctl_data_t adpctl_int = {.d32 = 0, .b.adp_prb_int = 1,
+                                                               .b.adp_sns_int = 1, b.adp_tmout_int};
+#endif
+       dwc_otg_disable_global_interrupts(core_if);
+       DWC_PRINTF("ADP Probe Start\n");
+       core_if->adp.probe_enabled = 1;
+
+       adpctl.b.adpres = 1;
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+
+       while (adpctl.b.adpres) {
+               adpctl.d32 = dwc_otg_adp_read_reg(core_if);
+       }
+
+       adpctl.d32 = 0;
+       gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+
+       /* In Host mode unmask SRP detected interrupt */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.sts_chngint_msk = 1;
+       if (!gpwrdn.b.idsts) {
+               gpwrdn.b.srp_det_msk = 1;
+       }
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+
+       adpctl.b.adp_tmout_int_msk = 1;
+       adpctl.b.adp_prb_int_msk = 1;
+       adpctl.b.prb_dschg = 1;
+       adpctl.b.prb_delta = 1;
+       adpctl.b.prb_per = 1;
+       adpctl.b.adpen = 1;
+       adpctl.b.enaprb = 1;
+
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+       DWC_PRINTF("ADP Probe Finish\n");
+       return 0;
+}
+
+/**
+ * Starts the ADP Sense timer to detect if ADP Sense interrupt is not asserted
+ * within 3 seconds.
+ *
+ * @param core_if the pointer to core_if strucure.
+ */
+void dwc_otg_adp_sense_timer_start(dwc_otg_core_if_t * core_if)
+{
+       core_if->adp.sense_timer_started = 1;
+       DWC_TIMER_SCHEDULE(core_if->adp.sense_timer, 3000 /* 3 secs */ );
+}
+
+/**
+ * Starts the ADP Sense
+ *
+ * @param core_if the pointer to core_if strucure.
+ */
+uint32_t dwc_otg_adp_sense_start(dwc_otg_core_if_t * core_if)
+{
+       adpctl_data_t adpctl;
+
+       DWC_PRINTF("ADP Sense Start\n");
+
+       /* Unmask ADP sense interrupt and mask all other from the core */
+       adpctl.d32 = dwc_otg_adp_read_reg_filter(core_if);
+       adpctl.b.adp_sns_int_msk = 1;
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+       dwc_otg_disable_global_interrupts(core_if); // vahrama
+
+       /* Set ADP reset bit*/
+       adpctl.d32 = dwc_otg_adp_read_reg_filter(core_if);
+       adpctl.b.adpres = 1;
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+
+       while (adpctl.b.adpres) {
+               adpctl.d32 = dwc_otg_adp_read_reg(core_if);
+       }
+
+       adpctl.b.adpres = 0;
+       adpctl.b.adpen = 1;
+       adpctl.b.enasns = 1;
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+
+       dwc_otg_adp_sense_timer_start(core_if);
+
+       return 0;
+}
+
+/**
+ * Stops the ADP Probing
+ *
+ * @param core_if the pointer to core_if strucure.
+ */
+uint32_t dwc_otg_adp_probe_stop(dwc_otg_core_if_t * core_if)
+{
+
+       adpctl_data_t adpctl;
+       DWC_PRINTF("Stop ADP probe\n");
+       core_if->adp.probe_enabled = 0;
+       core_if->adp.probe_counter = 0;
+       adpctl.d32 = dwc_otg_adp_read_reg(core_if);
+
+       adpctl.b.adpen = 0;
+       adpctl.b.adp_prb_int = 1;
+       adpctl.b.adp_tmout_int = 1;
+       adpctl.b.adp_sns_int = 1;
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+
+       return 0;
+}
+
+/**
+ * Stops the ADP Sensing
+ *
+ * @param core_if the pointer to core_if strucure.
+ */
+uint32_t dwc_otg_adp_sense_stop(dwc_otg_core_if_t * core_if)
+{
+       adpctl_data_t adpctl;
+
+       core_if->adp.sense_enabled = 0;
+
+       adpctl.d32 = dwc_otg_adp_read_reg_filter(core_if);
+       adpctl.b.enasns = 0;
+       adpctl.b.adp_sns_int = 1;
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+
+       return 0;
+}
+
+/**
+ * Called to turn on the VBUS after initial ADP probe in host mode.
+ * If port power was already enabled in cil_hcd_start function then
+ * only schedule a timer.
+ *
+ * @param core_if the pointer to core_if structure.
+ */
+void dwc_otg_adp_turnon_vbus(dwc_otg_core_if_t * core_if)
+{
+       hprt0_data_t hprt0 = {.d32 = 0 };
+       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+       DWC_PRINTF("Turn on VBUS for 1.1s, port power is %d\n", hprt0.b.prtpwr);
+
+       if (hprt0.b.prtpwr == 0) {
+               hprt0.b.prtpwr = 1;
+               //DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+       }
+
+       dwc_otg_adp_vbuson_timer_start(core_if);
+}
+
+/**
+ * Called right after driver is loaded
+ * to perform initial actions for ADP
+ *
+ * @param core_if the pointer to core_if structure.
+ * @param is_host - flag for current mode of operation either from GINTSTS or GPWRDN
+ */
+void dwc_otg_adp_start(dwc_otg_core_if_t * core_if, uint8_t is_host)
+{
+       gpwrdn_data_t gpwrdn;
+
+       DWC_PRINTF("ADP Initial Start\n");
+       core_if->adp.adp_started = 1;
+
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+       dwc_otg_disable_global_interrupts(core_if);
+       if (is_host) {
+               DWC_PRINTF("HOST MODE\n");
+               /* Enable Power Down Logic Interrupt*/
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pmuintsel = 1;
+               gpwrdn.b.pmuactv = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+               /* Initialize first ADP probe to obtain Ramp Time value */
+               core_if->adp.initial_probe = 1;
+               dwc_otg_adp_probe_start(core_if);
+       } else {
+               gotgctl_data_t gotgctl;
+               gotgctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
+               DWC_PRINTF("DEVICE MODE\n");
+               if (gotgctl.b.bsesvld == 0) {
+                       /* Enable Power Down Logic Interrupt*/
+                       gpwrdn.d32 = 0;
+                       DWC_PRINTF("VBUS is not valid - start ADP probe\n");
+                       gpwrdn.b.pmuintsel = 1;
+                       gpwrdn.b.pmuactv = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+                       core_if->adp.initial_probe = 1;
+                       dwc_otg_adp_probe_start(core_if);
+               } else {
+                       DWC_PRINTF("VBUS is valid - initialize core as a Device\n");
+                       core_if->op_state = B_PERIPHERAL;
+                       dwc_otg_core_init(core_if);
+                       dwc_otg_enable_global_interrupts(core_if);
+                       cil_pcd_start(core_if);
+                       dwc_otg_dump_global_registers(core_if);
+                       dwc_otg_dump_dev_registers(core_if);
+               }
+       }
+}
+
+void dwc_otg_adp_init(dwc_otg_core_if_t * core_if)
+{
+       core_if->adp.adp_started = 0;
+       core_if->adp.initial_probe = 0;
+       core_if->adp.probe_timer_values[0] = -1;
+       core_if->adp.probe_timer_values[1] = -1;
+       core_if->adp.probe_enabled = 0;
+       core_if->adp.sense_enabled = 0;
+       core_if->adp.sense_timer_started = 0;
+       core_if->adp.vbuson_timer_started = 0;
+       core_if->adp.probe_counter = 0;
+       core_if->adp.gpwrdn = 0;
+       core_if->adp.attached = DWC_OTG_ADP_UNKOWN;
+       /* Initialize timers */
+       core_if->adp.sense_timer =
+           DWC_TIMER_ALLOC("ADP SENSE TIMER", adp_sense_timeout, core_if);
+       core_if->adp.vbuson_timer =
+           DWC_TIMER_ALLOC("ADP VBUS ON TIMER", adp_vbuson_timeout, core_if);
+       if (!core_if->adp.sense_timer || !core_if->adp.vbuson_timer)
+       {
+               DWC_ERROR("Could not allocate memory for ADP timers\n");
+       }
+}
+
+void dwc_otg_adp_remove(dwc_otg_core_if_t * core_if)
+{
+       gpwrdn_data_t gpwrdn = { .d32 = 0 };
+       gpwrdn.b.pmuintsel = 1;
+       gpwrdn.b.pmuactv = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       if (core_if->adp.probe_enabled)
+               dwc_otg_adp_probe_stop(core_if);
+       if (core_if->adp.sense_enabled)
+               dwc_otg_adp_sense_stop(core_if);
+       if (core_if->adp.sense_timer_started)
+               DWC_TIMER_CANCEL(core_if->adp.sense_timer);
+       if (core_if->adp.vbuson_timer_started)
+               DWC_TIMER_CANCEL(core_if->adp.vbuson_timer);
+       DWC_TIMER_FREE(core_if->adp.sense_timer);
+       DWC_TIMER_FREE(core_if->adp.vbuson_timer);
+}
+
+/////////////////////////////////////////////////////////////////////
+////////////// ADP Interrupt Handlers ///////////////////////////////
+/////////////////////////////////////////////////////////////////////
+/**
+ * This function sets Ramp Timer values
+ */
+static uint32_t set_timer_value(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       if (core_if->adp.probe_timer_values[0] == -1) {
+               core_if->adp.probe_timer_values[0] = val;
+               core_if->adp.probe_timer_values[1] = -1;
+               return 1;
+       } else {
+               core_if->adp.probe_timer_values[1] =
+                   core_if->adp.probe_timer_values[0];
+               core_if->adp.probe_timer_values[0] = val;
+               return 0;
+       }
+}
+
+/**
+ * This function compares Ramp Timer values
+ */
+static uint32_t compare_timer_values(dwc_otg_core_if_t * core_if)
+{
+       uint32_t diff;
+       if (core_if->adp.probe_timer_values[0]>=core_if->adp.probe_timer_values[1])
+                       diff = core_if->adp.probe_timer_values[0]-core_if->adp.probe_timer_values[1];
+       else
+                       diff = core_if->adp.probe_timer_values[1]-core_if->adp.probe_timer_values[0];
+       if(diff < 2) {
+               return 0;
+       } else {
+               return 1;
+       }
+}
+
+/**
+ * This function handles ADP Probe Interrupts
+ */
+static int32_t dwc_otg_adp_handle_prb_intr(dwc_otg_core_if_t * core_if,
+                                                uint32_t val)
+{
+       adpctl_data_t adpctl = {.d32 = 0 };
+       gpwrdn_data_t gpwrdn, temp;
+       adpctl.d32 = val;
+
+       temp.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+       core_if->adp.probe_counter++;
+       core_if->adp.gpwrdn = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+       if (adpctl.b.rtim == 0 && !temp.b.idsts){
+               DWC_PRINTF("RTIM value is 0\n");
+               goto exit;
+       }
+       if (set_timer_value(core_if, adpctl.b.rtim) &&
+           core_if->adp.initial_probe) {
+               core_if->adp.initial_probe = 0;
+               dwc_otg_adp_probe_stop(core_if);
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pmuactv = 1;
+               gpwrdn.b.pmuintsel = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+
+               /* check which value is for device mode and which for Host mode */
+               if (!temp.b.idsts) {    /* considered host mode value is 0 */
+                       /*
+                        * Turn on VBUS after initial ADP probe.
+                        */
+                       core_if->op_state = A_HOST;
+                       dwc_otg_enable_global_interrupts(core_if);
+                       DWC_SPINUNLOCK(core_if->lock);
+                       cil_hcd_start(core_if);
+                       dwc_otg_adp_turnon_vbus(core_if);
+                       DWC_SPINLOCK(core_if->lock);
+               } else {
+                       /*
+                        * Initiate SRP after initial ADP probe.
+                        */
+                       dwc_otg_enable_global_interrupts(core_if);
+                       dwc_otg_initiate_srp(core_if);
+               }
+       } else if (core_if->adp.probe_counter > 2){
+               gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+               if (compare_timer_values(core_if)) {
+                       DWC_PRINTF("Difference in timer values !!! \n");
+//                      core_if->adp.attached = DWC_OTG_ADP_ATTACHED;
+                       dwc_otg_adp_probe_stop(core_if);
+
+                       /* Power on the core */
+                       if (core_if->power_down == 2) {
+                               gpwrdn.b.pwrdnswtch = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                       }
+
+                       /* check which value is for device mode and which for Host mode */
+                       if (!temp.b.idsts) {    /* considered host mode value is 0 */
+                               /* Disable Interrupt from Power Down Logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pmuintsel = 1;
+                               gpwrdn.b.pmuactv = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, gpwrdn.d32, 0);
+
+                               /*
+                                * Initialize the Core for Host mode.
+                                */
+                               core_if->op_state = A_HOST;
+                               dwc_otg_core_init(core_if);
+                               dwc_otg_enable_global_interrupts(core_if);
+                               cil_hcd_start(core_if);
+                       } else {
+                               gotgctl_data_t gotgctl;
+                               /* Mask SRP detected interrupt from Power Down Logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.srp_det_msk = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, gpwrdn.d32, 0);
+
+                               /* Disable Power Down Logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pmuintsel = 1;
+                               gpwrdn.b.pmuactv = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, gpwrdn.d32, 0);
+
+                               /*
+                                * Initialize the Core for Device mode.
+                                */
+                               core_if->op_state = B_PERIPHERAL;
+                               dwc_otg_core_init(core_if);
+                               dwc_otg_enable_global_interrupts(core_if);
+                               cil_pcd_start(core_if);
+
+                               gotgctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
+                               if (!gotgctl.b.bsesvld) {
+                                       dwc_otg_initiate_srp(core_if);
+                               }
+                       }
+               }
+               if (core_if->power_down == 2) {
+                       if (gpwrdn.b.bsessvld) {
+                               /* Mask SRP detected interrupt from Power Down Logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.srp_det_msk = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+                               /* Disable Power Down Logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pmuactv = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+                               /*
+                                * Initialize the Core for Device mode.
+                                */
+                               core_if->op_state = B_PERIPHERAL;
+                               dwc_otg_core_init(core_if);
+                               dwc_otg_enable_global_interrupts(core_if);
+                               cil_pcd_start(core_if);
+                       }
+               }
+       }
+exit:
+       /* Clear interrupt */
+       adpctl.d32 = dwc_otg_adp_read_reg(core_if);
+       adpctl.b.adp_prb_int = 1;
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+
+       return 0;
+}
+
+/**
+ * This function hadles ADP Sense Interrupt
+ */
+static int32_t dwc_otg_adp_handle_sns_intr(dwc_otg_core_if_t * core_if)
+{
+       adpctl_data_t adpctl;
+       /* Stop ADP Sense timer */
+       DWC_TIMER_CANCEL(core_if->adp.sense_timer);
+
+       /* Restart ADP Sense timer */
+       dwc_otg_adp_sense_timer_start(core_if);
+
+       /* Clear interrupt */
+       adpctl.d32 = dwc_otg_adp_read_reg(core_if);
+       adpctl.b.adp_sns_int = 1;
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+
+       return 0;
+}
+
+/**
+ * This function handles ADP Probe Interrupts
+ */
+static int32_t dwc_otg_adp_handle_prb_tmout_intr(dwc_otg_core_if_t * core_if,
+                                                uint32_t val)
+{
+       adpctl_data_t adpctl = {.d32 = 0 };
+       adpctl.d32 = val;
+       set_timer_value(core_if, adpctl.b.rtim);
+
+       /* Clear interrupt */
+       adpctl.d32 = dwc_otg_adp_read_reg(core_if);
+       adpctl.b.adp_tmout_int = 1;
+       dwc_otg_adp_write_reg(core_if, adpctl.d32);
+
+       return 0;
+}
+
+/**
+ * ADP Interrupt handler.
+ *
+ */
+int32_t dwc_otg_adp_handle_intr(dwc_otg_core_if_t * core_if)
+{
+       int retval = 0;
+       adpctl_data_t adpctl = {.d32 = 0};
+
+       adpctl.d32 = dwc_otg_adp_read_reg(core_if);
+       DWC_PRINTF("ADPCTL = %08x\n",adpctl.d32);
+
+       if (adpctl.b.adp_sns_int & adpctl.b.adp_sns_int_msk) {
+               DWC_PRINTF("ADP Sense interrupt\n");
+               retval |= dwc_otg_adp_handle_sns_intr(core_if);
+       }
+       if (adpctl.b.adp_tmout_int & adpctl.b.adp_tmout_int_msk) {
+               DWC_PRINTF("ADP timeout interrupt\n");
+               retval |= dwc_otg_adp_handle_prb_tmout_intr(core_if, adpctl.d32);
+       }
+       if (adpctl.b.adp_prb_int & adpctl.b.adp_prb_int_msk) {
+               DWC_PRINTF("ADP Probe interrupt\n");
+               adpctl.b.adp_prb_int = 1;
+               retval |= dwc_otg_adp_handle_prb_intr(core_if, adpctl.d32);
+       }
+
+//     dwc_otg_adp_modify_reg(core_if, adpctl.d32, 0);
+       //dwc_otg_adp_write_reg(core_if, adpctl.d32);
+       DWC_PRINTF("RETURN FROM ADP ISR\n");
+
+       return retval;
+}
+
+/**
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+int32_t dwc_otg_adp_handle_srp_intr(dwc_otg_core_if_t * core_if)
+{
+
+#ifndef DWC_HOST_ONLY
+       hprt0_data_t hprt0;
+       gpwrdn_data_t gpwrdn;
+       DWC_DEBUGPL(DBG_ANY, "++ Power Down Logic Session Request Interrupt++\n");
+
+       gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+       /* check which value is for device mode and which for Host mode */
+       if (!gpwrdn.b.idsts) {  /* considered host mode value is 0 */
+               DWC_PRINTF("SRP: Host mode\n");
+
+               if (core_if->adp_enable) {
+                       dwc_otg_adp_probe_stop(core_if);
+
+                       /* Power on the core */
+                       if (core_if->power_down == 2) {
+                               gpwrdn.b.pwrdnswtch = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                       }
+
+                       core_if->op_state = A_HOST;
+                       dwc_otg_core_init(core_if);
+                       dwc_otg_enable_global_interrupts(core_if);
+                       cil_hcd_start(core_if);
+               }
+
+               /* Turn on the port power bit. */
+               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+               hprt0.b.prtpwr = 1;
+               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+
+               /* Start the Connection timer. So a message can be displayed
+                * if connect does not occur within 10 seconds. */
+               cil_hcd_session_start(core_if);
+       } else {
+               DWC_PRINTF("SRP: Device mode %s\n", __FUNCTION__);
+               if (core_if->adp_enable) {
+                       dwc_otg_adp_probe_stop(core_if);
+
+                       /* Power on the core */
+                       if (core_if->power_down == 2) {
+                               gpwrdn.b.pwrdnswtch = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                       }
+
+                       gpwrdn.d32 = 0;
+                       gpwrdn.b.pmuactv = 0;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0,
+                                        gpwrdn.d32);
+
+                       core_if->op_state = B_PERIPHERAL;
+                       dwc_otg_core_init(core_if);
+                       dwc_otg_enable_global_interrupts(core_if);
+                       cil_pcd_start(core_if);
+               }
+       }
+#endif
+       return 1;
+}
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_adp.h
@@ -0,0 +1,80 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_adp.h $
+ * $Revision: #7 $
+ * $Date: 2011/10/24 $
+ * $Change: 1871159 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+#ifndef __DWC_OTG_ADP_H__
+#define __DWC_OTG_ADP_H__
+
+/**
+ * @file
+ *
+ * This file contains the Attach Detect Protocol interfaces and defines
+ * (functions) and structures for Linux.
+ *
+ */
+
+#define DWC_OTG_ADP_UNATTACHED 0
+#define DWC_OTG_ADP_ATTACHED   1
+#define DWC_OTG_ADP_UNKOWN     2
+
+typedef struct dwc_otg_adp {
+       uint32_t adp_started;
+       uint32_t initial_probe;
+       int32_t probe_timer_values[2];
+       uint32_t probe_enabled;
+       uint32_t sense_enabled;
+       dwc_timer_t *sense_timer;
+       uint32_t sense_timer_started;
+       dwc_timer_t *vbuson_timer;
+       uint32_t vbuson_timer_started;
+       uint32_t attached;
+       uint32_t probe_counter;
+       uint32_t gpwrdn;
+} dwc_otg_adp_t;
+
+/**
+ * Attach Detect Protocol functions
+ */
+
+extern void dwc_otg_adp_write_reg(dwc_otg_core_if_t * core_if, uint32_t value);
+extern uint32_t dwc_otg_adp_read_reg(dwc_otg_core_if_t * core_if);
+extern uint32_t dwc_otg_adp_probe_start(dwc_otg_core_if_t * core_if);
+extern uint32_t dwc_otg_adp_sense_start(dwc_otg_core_if_t * core_if);
+extern uint32_t dwc_otg_adp_probe_stop(dwc_otg_core_if_t * core_if);
+extern uint32_t dwc_otg_adp_sense_stop(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_adp_start(dwc_otg_core_if_t * core_if, uint8_t is_host);
+extern void dwc_otg_adp_init(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_adp_remove(dwc_otg_core_if_t * core_if);
+extern int32_t dwc_otg_adp_handle_intr(dwc_otg_core_if_t * core_if);
+extern int32_t dwc_otg_adp_handle_srp_intr(dwc_otg_core_if_t * core_if);
+
+#endif //__DWC_OTG_ADP_H__
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_attr.c
@@ -0,0 +1,1212 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_attr.c $
+ * $Revision: #44 $
+ * $Date: 2010/11/29 $
+ * $Change: 1636033 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+/** @file
+ *
+ * The diagnostic interface will provide access to the controller for
+ * bringing up the hardware and testing.  The Linux driver attributes
+ * feature will be used to provide the Linux Diagnostic
+ * Interface. These attributes are accessed through sysfs.
+ */
+
+/** @page "Linux Module Attributes"
+ *
+ * The Linux module attributes feature is used to provide the Linux
+ * Diagnostic Interface.  These attributes are accessed through sysfs.
+ * The diagnostic interface will provide access to the controller for
+ * bringing up the hardware and testing.
+
+ The following table shows the attributes.
+ <table>
+ <tr>
+ <td><b> Name</b></td>
+ <td><b> Description</b></td>
+ <td><b> Access</b></td>
+ </tr>
+
+ <tr>
+ <td> mode </td>
+ <td> Returns the current mode: 0 for device mode, 1 for host mode</td>
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> hnpcapable </td>
+ <td> Gets or sets the "HNP-capable" bit in the Core USB Configuraton Register.
+ Read returns the current value.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> srpcapable </td>
+ <td> Gets or sets the "SRP-capable" bit in the Core USB Configuraton Register.
+ Read returns the current value.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> hsic_connect </td>
+ <td> Gets or sets the "HSIC-Connect" bit in the GLPMCFG Register.
+ Read returns the current value.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> inv_sel_hsic </td>
+ <td> Gets or sets the "Invert Select HSIC" bit in the GLPMFG Register.
+ Read returns the current value.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> hnp </td>
+ <td> Initiates the Host Negotiation Protocol.  Read returns the status.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> srp </td>
+ <td> Initiates the Session Request Protocol.  Read returns the status.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> buspower </td>
+ <td> Gets or sets the Power State of the bus (0 - Off or 1 - On)</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> bussuspend </td>
+ <td> Suspends the USB bus.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> busconnected </td>
+ <td> Gets the connection status of the bus</td>
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> gotgctl </td>
+ <td> Gets or sets the Core Control Status Register.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> gusbcfg </td>
+ <td> Gets or sets the Core USB Configuration Register</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> grxfsiz </td>
+ <td> Gets or sets the Receive FIFO Size Register</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> gnptxfsiz </td>
+ <td> Gets or sets the non-periodic Transmit Size Register</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> gpvndctl </td>
+ <td> Gets or sets the PHY Vendor Control Register</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> ggpio </td>
+ <td> Gets the value in the lower 16-bits of the General Purpose IO Register
+ or sets the upper 16 bits.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> guid </td>
+ <td> Gets or sets the value of the User ID Register</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> gsnpsid </td>
+ <td> Gets the value of the Synopsys ID Regester</td>
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> devspeed </td>
+ <td> Gets or sets the device speed setting in the DCFG register</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> enumspeed </td>
+ <td> Gets the device enumeration Speed.</td>
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> hptxfsiz </td>
+ <td> Gets the value of the Host Periodic Transmit FIFO</td>
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> hprt0 </td>
+ <td> Gets or sets the value in the Host Port Control and Status Register</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> regoffset </td>
+ <td> Sets the register offset for the next Register Access</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> regvalue </td>
+ <td> Gets or sets the value of the register at the offset in the regoffset attribute.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> remote_wakeup </td>
+ <td> On read, shows the status of Remote Wakeup. On write, initiates a remote
+ wakeup of the host. When bit 0 is 1 and Remote Wakeup is enabled, the Remote
+ Wakeup signalling bit in the Device Control Register is set for 1
+ milli-second.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> rem_wakeup_pwrdn </td>
+ <td> On read, shows the status core - hibernated or not. On write, initiates
+ a remote wakeup of the device from Hibernation. </td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> mode_ch_tim_en </td>
+ <td> This bit is used to enable or disable the host core to wait for 200 PHY
+ clock cycles at the end of Resume to change the opmode signal to the PHY to 00
+ after Suspend or LPM. </td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> fr_interval </td>
+ <td> On read, shows the value of HFIR Frame Interval. On write, dynamically
+ reload HFIR register during runtime. The application can write a value to this
+ register only after the Port Enable bit of the Host Port Control and Status
+ register (HPRT.PrtEnaPort) has been set </td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> disconnect_us </td>
+ <td> On read, shows the status of disconnect_device_us. On write, sets disconnect_us
+ which causes soft disconnect for 100us. Applicable only for device mode of operation.</td>
+ <td> Read/Write</td>
+ </tr>
+
+ <tr>
+ <td> regdump </td>
+ <td> Dumps the contents of core registers.</td>
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> spramdump </td>
+ <td> Dumps the contents of core registers.</td>
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> hcddump </td>
+ <td> Dumps the current HCD state.</td>
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> hcd_frrem </td>
+ <td> Shows the average value of the Frame Remaining
+ field in the Host Frame Number/Frame Remaining register when an SOF interrupt
+ occurs. This can be used to determine the average interrupt latency. Also
+ shows the average Frame Remaining value for start_transfer and the "a" and
+ "b" sample points. The "a" and "b" sample points may be used during debugging
+ bto determine how long it takes to execute a section of the HCD code.</td>
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> rd_reg_test </td>
+ <td> Displays the time required to read the GNPTXFSIZ register many times
+ (the output shows the number of times the register is read).
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> wr_reg_test </td>
+ <td> Displays the time required to write the GNPTXFSIZ register many times
+ (the output shows the number of times the register is written).
+ <td> Read</td>
+ </tr>
+
+ <tr>
+ <td> lpm_response </td>
+ <td> Gets or sets lpm_response mode. Applicable only in device mode.
+ <td> Write</td>
+ </tr>
+
+ <tr>
+ <td> sleep_status </td>
+ <td> Shows sleep status of device.
+ <td> Read</td>
+ </tr>
+
+ </table>
+
+ Example usage:
+ To get the current mode:
+ cat /sys/devices/lm0/mode
+
+ To power down the USB:
+ echo 0 > /sys/devices/lm0/buspower
+ */
+
+#include "dwc_otg_os_dep.h"
+#include "dwc_os.h"
+#include "dwc_otg_driver.h"
+#include "dwc_otg_attr.h"
+#include "dwc_otg_core_if.h"
+#include "dwc_otg_pcd_if.h"
+#include "dwc_otg_hcd_if.h"
+
+/*
+ * MACROs for defining sysfs attribute
+ */
+#ifdef LM_INTERFACE
+
+#define DWC_OTG_DEVICE_ATTR_BITFIELD_SHOW(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_show (struct device *_dev, struct device_attribute *attr, char *buf) \
+{ \
+       struct lm_device *lm_dev = container_of(_dev, struct lm_device, dev); \
+       dwc_otg_device_t *otg_dev = lm_get_drvdata(lm_dev);             \
+       uint32_t val; \
+       val = dwc_otg_get_##_otg_attr_name_ (otg_dev->core_if); \
+       return sprintf (buf, "%s = 0x%x\n", _string_, val); \
+}
+#define DWC_OTG_DEVICE_ATTR_BITFIELD_STORE(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_store (struct device *_dev, struct device_attribute *attr, \
+                                       const char *buf, size_t count) \
+{ \
+       struct lm_device *lm_dev = container_of(_dev, struct lm_device, dev); \
+       dwc_otg_device_t *otg_dev = lm_get_drvdata(lm_dev); \
+       uint32_t set = simple_strtoul(buf, NULL, 16); \
+       dwc_otg_set_##_otg_attr_name_(otg_dev->core_if, set);\
+       return count; \
+}
+
+#elif defined(PCI_INTERFACE)
+
+#define DWC_OTG_DEVICE_ATTR_BITFIELD_SHOW(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_show (struct device *_dev, struct device_attribute *attr, char *buf) \
+{ \
+       dwc_otg_device_t *otg_dev = dev_get_drvdata(_dev);      \
+       uint32_t val; \
+       val = dwc_otg_get_##_otg_attr_name_ (otg_dev->core_if); \
+       return sprintf (buf, "%s = 0x%x\n", _string_, val); \
+}
+#define DWC_OTG_DEVICE_ATTR_BITFIELD_STORE(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_store (struct device *_dev, struct device_attribute *attr, \
+                                       const char *buf, size_t count) \
+{ \
+       dwc_otg_device_t *otg_dev = dev_get_drvdata(_dev);  \
+       uint32_t set = simple_strtoul(buf, NULL, 16); \
+       dwc_otg_set_##_otg_attr_name_(otg_dev->core_if, set);\
+       return count; \
+}
+
+#elif defined(PLATFORM_INTERFACE)
+
+#define DWC_OTG_DEVICE_ATTR_BITFIELD_SHOW(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_show (struct device *_dev, struct device_attribute *attr, char *buf) \
+{ \
+        struct platform_device *platform_dev = \
+                container_of(_dev, struct platform_device, dev); \
+        dwc_otg_device_t *otg_dev = platform_get_drvdata(platform_dev);  \
+       uint32_t val; \
+       DWC_PRINTF("%s(%p) -> platform_dev %p, otg_dev %p\n", \
+                    __func__, _dev, platform_dev, otg_dev); \
+       val = dwc_otg_get_##_otg_attr_name_ (otg_dev->core_if); \
+       return sprintf (buf, "%s = 0x%x\n", _string_, val); \
+}
+#define DWC_OTG_DEVICE_ATTR_BITFIELD_STORE(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_store (struct device *_dev, struct device_attribute *attr, \
+                                       const char *buf, size_t count) \
+{ \
+        struct platform_device *platform_dev = container_of(_dev, struct platform_device, dev); \
+        dwc_otg_device_t *otg_dev = platform_get_drvdata(platform_dev); \
+       uint32_t set = simple_strtoul(buf, NULL, 16); \
+       dwc_otg_set_##_otg_attr_name_(otg_dev->core_if, set);\
+       return count; \
+}
+#endif
+
+/*
+ * MACROs for defining sysfs attribute for 32-bit registers
+ */
+#ifdef LM_INTERFACE
+#define DWC_OTG_DEVICE_ATTR_REG_SHOW(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_show (struct device *_dev, struct device_attribute *attr, char *buf) \
+{ \
+       struct lm_device *lm_dev = container_of(_dev, struct lm_device, dev); \
+       dwc_otg_device_t *otg_dev = lm_get_drvdata(lm_dev); \
+       uint32_t val; \
+       val = dwc_otg_get_##_otg_attr_name_ (otg_dev->core_if); \
+       return sprintf (buf, "%s = 0x%08x\n", _string_, val); \
+}
+#define DWC_OTG_DEVICE_ATTR_REG_STORE(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_store (struct device *_dev, struct device_attribute *attr, \
+                                       const char *buf, size_t count) \
+{ \
+       struct lm_device *lm_dev = container_of(_dev, struct lm_device, dev); \
+       dwc_otg_device_t *otg_dev = lm_get_drvdata(lm_dev); \
+       uint32_t val = simple_strtoul(buf, NULL, 16); \
+       dwc_otg_set_##_otg_attr_name_ (otg_dev->core_if, val); \
+       return count; \
+}
+#elif defined(PCI_INTERFACE)
+#define DWC_OTG_DEVICE_ATTR_REG_SHOW(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_show (struct device *_dev, struct device_attribute *attr, char *buf) \
+{ \
+       dwc_otg_device_t *otg_dev = dev_get_drvdata(_dev);  \
+       uint32_t val; \
+       val = dwc_otg_get_##_otg_attr_name_ (otg_dev->core_if); \
+       return sprintf (buf, "%s = 0x%08x\n", _string_, val); \
+}
+#define DWC_OTG_DEVICE_ATTR_REG_STORE(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_store (struct device *_dev, struct device_attribute *attr, \
+                                       const char *buf, size_t count) \
+{ \
+       dwc_otg_device_t *otg_dev = dev_get_drvdata(_dev);  \
+       uint32_t val = simple_strtoul(buf, NULL, 16); \
+       dwc_otg_set_##_otg_attr_name_ (otg_dev->core_if, val); \
+       return count; \
+}
+
+#elif defined(PLATFORM_INTERFACE)
+#include "dwc_otg_dbg.h"
+#define DWC_OTG_DEVICE_ATTR_REG_SHOW(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_show (struct device *_dev, struct device_attribute *attr, char *buf) \
+{ \
+       struct platform_device *platform_dev = container_of(_dev, struct platform_device, dev); \
+       dwc_otg_device_t *otg_dev = platform_get_drvdata(platform_dev); \
+       uint32_t val; \
+       DWC_PRINTF("%s(%p) -> platform_dev %p, otg_dev %p\n", \
+                    __func__, _dev, platform_dev, otg_dev); \
+       val = dwc_otg_get_##_otg_attr_name_ (otg_dev->core_if); \
+       return sprintf (buf, "%s = 0x%08x\n", _string_, val); \
+}
+#define DWC_OTG_DEVICE_ATTR_REG_STORE(_otg_attr_name_,_string_) \
+static ssize_t _otg_attr_name_##_store (struct device *_dev, struct device_attribute *attr, \
+                                       const char *buf, size_t count) \
+{ \
+       struct platform_device *platform_dev = container_of(_dev, struct platform_device, dev); \
+       dwc_otg_device_t *otg_dev = platform_get_drvdata(platform_dev); \
+       uint32_t val = simple_strtoul(buf, NULL, 16); \
+       dwc_otg_set_##_otg_attr_name_ (otg_dev->core_if, val); \
+       return count; \
+}
+
+#endif
+
+#define DWC_OTG_DEVICE_ATTR_BITFIELD_RW(_otg_attr_name_,_string_) \
+DWC_OTG_DEVICE_ATTR_BITFIELD_SHOW(_otg_attr_name_,_string_) \
+DWC_OTG_DEVICE_ATTR_BITFIELD_STORE(_otg_attr_name_,_string_) \
+DEVICE_ATTR(_otg_attr_name_,0644,_otg_attr_name_##_show,_otg_attr_name_##_store);
+
+#define DWC_OTG_DEVICE_ATTR_BITFIELD_RO(_otg_attr_name_,_string_) \
+DWC_OTG_DEVICE_ATTR_BITFIELD_SHOW(_otg_attr_name_,_string_) \
+DEVICE_ATTR(_otg_attr_name_,0444,_otg_attr_name_##_show,NULL);
+
+#define DWC_OTG_DEVICE_ATTR_REG32_RW(_otg_attr_name_,_addr_,_string_) \
+DWC_OTG_DEVICE_ATTR_REG_SHOW(_otg_attr_name_,_string_) \
+DWC_OTG_DEVICE_ATTR_REG_STORE(_otg_attr_name_,_string_) \
+DEVICE_ATTR(_otg_attr_name_,0644,_otg_attr_name_##_show,_otg_attr_name_##_store);
+
+#define DWC_OTG_DEVICE_ATTR_REG32_RO(_otg_attr_name_,_addr_,_string_) \
+DWC_OTG_DEVICE_ATTR_REG_SHOW(_otg_attr_name_,_string_) \
+DEVICE_ATTR(_otg_attr_name_,0444,_otg_attr_name_##_show,NULL);
+
+/** @name Functions for Show/Store of Attributes */
+/**@{*/
+
+/**
+ * Helper function returning the otg_device structure of the given device
+ */
+static dwc_otg_device_t *dwc_otg_drvdev(struct device *_dev)
+{
+        dwc_otg_device_t *otg_dev;
+        DWC_OTG_GETDRVDEV(otg_dev, _dev);
+        return otg_dev;
+}
+
+/**
+ * Show the register offset of the Register Access.
+ */
+static ssize_t regoffset_show(struct device *_dev,
+                             struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       return snprintf(buf, sizeof("0xFFFFFFFF\n") + 1, "0x%08x\n",
+                       otg_dev->os_dep.reg_offset);
+}
+
+/**
+ * Set the register offset for the next Register Access        Read/Write
+ */
+static ssize_t regoffset_store(struct device *_dev,
+                              struct device_attribute *attr,
+                              const char *buf, size_t count)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t offset = simple_strtoul(buf, NULL, 16);
+#if defined(LM_INTERFACE) || defined(PLATFORM_INTERFACE)
+       if (offset < SZ_256K) {
+#elif  defined(PCI_INTERFACE)
+       if (offset < 0x00040000) {
+#endif
+               otg_dev->os_dep.reg_offset = offset;
+       } else {
+               dev_err(_dev, "invalid offset\n");
+       }
+
+       return count;
+}
+
+DEVICE_ATTR(regoffset, S_IRUGO | S_IWUSR, regoffset_show, regoffset_store);
+
+/**
+ * Show the value of the register at the offset in the reg_offset
+ * attribute.
+ */
+static ssize_t regvalue_show(struct device *_dev,
+                            struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t val;
+       volatile uint32_t *addr;
+
+       if (otg_dev->os_dep.reg_offset != 0xFFFFFFFF && 0 != otg_dev->os_dep.base) {
+               /* Calculate the address */
+               addr = (uint32_t *) (otg_dev->os_dep.reg_offset +
+                                    (uint8_t *) otg_dev->os_dep.base);
+               val = DWC_READ_REG32(addr);
+               return snprintf(buf,
+                               sizeof("Reg@0xFFFFFFFF = 0xFFFFFFFF\n") + 1,
+                               "Reg@0x%06x = 0x%08x\n", otg_dev->os_dep.reg_offset,
+                               val);
+       } else {
+               dev_err(_dev, "Invalid offset (0x%0x)\n", otg_dev->os_dep.reg_offset);
+               return sprintf(buf, "invalid offset\n");
+       }
+}
+
+/**
+ * Store the value in the register at the offset in the reg_offset
+ * attribute.
+ *
+ */
+static ssize_t regvalue_store(struct device *_dev,
+                             struct device_attribute *attr,
+                             const char *buf, size_t count)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       volatile uint32_t *addr;
+       uint32_t val = simple_strtoul(buf, NULL, 16);
+       //dev_dbg(_dev, "Offset=0x%08x Val=0x%08x\n", otg_dev->reg_offset, val);
+       if (otg_dev->os_dep.reg_offset != 0xFFFFFFFF && 0 != otg_dev->os_dep.base) {
+               /* Calculate the address */
+               addr = (uint32_t *) (otg_dev->os_dep.reg_offset +
+                                    (uint8_t *) otg_dev->os_dep.base);
+               DWC_WRITE_REG32(addr, val);
+       } else {
+               dev_err(_dev, "Invalid Register Offset (0x%08x)\n",
+                       otg_dev->os_dep.reg_offset);
+       }
+       return count;
+}
+
+DEVICE_ATTR(regvalue, S_IRUGO | S_IWUSR, regvalue_show, regvalue_store);
+
+/*
+ * Attributes
+ */
+DWC_OTG_DEVICE_ATTR_BITFIELD_RO(mode, "Mode");
+DWC_OTG_DEVICE_ATTR_BITFIELD_RW(hnpcapable, "HNPCapable");
+DWC_OTG_DEVICE_ATTR_BITFIELD_RW(srpcapable, "SRPCapable");
+DWC_OTG_DEVICE_ATTR_BITFIELD_RW(hsic_connect, "HSIC Connect");
+DWC_OTG_DEVICE_ATTR_BITFIELD_RW(inv_sel_hsic, "Invert Select HSIC");
+
+//DWC_OTG_DEVICE_ATTR_BITFIELD_RW(buspower,&(otg_dev->core_if->core_global_regs->gotgctl),(1<<8),8,"Mode");
+//DWC_OTG_DEVICE_ATTR_BITFIELD_RW(bussuspend,&(otg_dev->core_if->core_global_regs->gotgctl),(1<<8),8,"Mode");
+DWC_OTG_DEVICE_ATTR_BITFIELD_RO(busconnected, "Bus Connected");
+
+DWC_OTG_DEVICE_ATTR_REG32_RW(gotgctl, 0, "GOTGCTL");
+DWC_OTG_DEVICE_ATTR_REG32_RW(gusbcfg,
+                            &(otg_dev->core_if->core_global_regs->gusbcfg),
+                            "GUSBCFG");
+DWC_OTG_DEVICE_ATTR_REG32_RW(grxfsiz,
+                            &(otg_dev->core_if->core_global_regs->grxfsiz),
+                            "GRXFSIZ");
+DWC_OTG_DEVICE_ATTR_REG32_RW(gnptxfsiz,
+                            &(otg_dev->core_if->core_global_regs->gnptxfsiz),
+                            "GNPTXFSIZ");
+DWC_OTG_DEVICE_ATTR_REG32_RW(gpvndctl,
+                            &(otg_dev->core_if->core_global_regs->gpvndctl),
+                            "GPVNDCTL");
+DWC_OTG_DEVICE_ATTR_REG32_RW(ggpio,
+                            &(otg_dev->core_if->core_global_regs->ggpio),
+                            "GGPIO");
+DWC_OTG_DEVICE_ATTR_REG32_RW(guid, &(otg_dev->core_if->core_global_regs->guid),
+                            "GUID");
+DWC_OTG_DEVICE_ATTR_REG32_RO(gsnpsid,
+                            &(otg_dev->core_if->core_global_regs->gsnpsid),
+                            "GSNPSID");
+DWC_OTG_DEVICE_ATTR_BITFIELD_RW(devspeed, "Device Speed");
+DWC_OTG_DEVICE_ATTR_BITFIELD_RO(enumspeed, "Device Enumeration Speed");
+
+DWC_OTG_DEVICE_ATTR_REG32_RO(hptxfsiz,
+                            &(otg_dev->core_if->core_global_regs->hptxfsiz),
+                            "HPTXFSIZ");
+DWC_OTG_DEVICE_ATTR_REG32_RW(hprt0, otg_dev->core_if->host_if->hprt0, "HPRT0");
+
+/**
+ * @todo Add code to initiate the HNP.
+ */
+/**
+ * Show the HNP status bit
+ */
+static ssize_t hnp_show(struct device *_dev,
+                       struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       return sprintf(buf, "HstNegScs = 0x%x\n",
+                      dwc_otg_get_hnpstatus(otg_dev->core_if));
+}
+
+/**
+ * Set the HNP Request bit
+ */
+static ssize_t hnp_store(struct device *_dev,
+                        struct device_attribute *attr,
+                        const char *buf, size_t count)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t in = simple_strtoul(buf, NULL, 16);
+       dwc_otg_set_hnpreq(otg_dev->core_if, in);
+       return count;
+}
+
+DEVICE_ATTR(hnp, 0644, hnp_show, hnp_store);
+
+/**
+ * @todo Add code to initiate the SRP.
+ */
+/**
+ * Show the SRP status bit
+ */
+static ssize_t srp_show(struct device *_dev,
+                       struct device_attribute *attr, char *buf)
+{
+#ifndef DWC_HOST_ONLY
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       return sprintf(buf, "SesReqScs = 0x%x\n",
+                      dwc_otg_get_srpstatus(otg_dev->core_if));
+#else
+       return sprintf(buf, "Host Only Mode!\n");
+#endif
+}
+
+/**
+ * Set the SRP Request bit
+ */
+static ssize_t srp_store(struct device *_dev,
+                        struct device_attribute *attr,
+                        const char *buf, size_t count)
+{
+#ifndef DWC_HOST_ONLY
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       dwc_otg_pcd_initiate_srp(otg_dev->pcd);
+#endif
+       return count;
+}
+
+DEVICE_ATTR(srp, 0644, srp_show, srp_store);
+
+/**
+ * @todo Need to do more for power on/off?
+ */
+/**
+ * Show the Bus Power status
+ */
+static ssize_t buspower_show(struct device *_dev,
+                            struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       return sprintf(buf, "Bus Power = 0x%x\n",
+                      dwc_otg_get_prtpower(otg_dev->core_if));
+}
+
+/**
+ * Set the Bus Power status
+ */
+static ssize_t buspower_store(struct device *_dev,
+                             struct device_attribute *attr,
+                             const char *buf, size_t count)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t on = simple_strtoul(buf, NULL, 16);
+       dwc_otg_set_prtpower(otg_dev->core_if, on);
+       return count;
+}
+
+DEVICE_ATTR(buspower, 0644, buspower_show, buspower_store);
+
+/**
+ * @todo Need to do more for suspend?
+ */
+/**
+ * Show the Bus Suspend status
+ */
+static ssize_t bussuspend_show(struct device *_dev,
+                              struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       return sprintf(buf, "Bus Suspend = 0x%x\n",
+                      dwc_otg_get_prtsuspend(otg_dev->core_if));
+}
+
+/**
+ * Set the Bus Suspend status
+ */
+static ssize_t bussuspend_store(struct device *_dev,
+                               struct device_attribute *attr,
+                               const char *buf, size_t count)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t in = simple_strtoul(buf, NULL, 16);
+       dwc_otg_set_prtsuspend(otg_dev->core_if, in);
+       return count;
+}
+
+DEVICE_ATTR(bussuspend, 0644, bussuspend_show, bussuspend_store);
+
+/**
+ * Show the Mode Change Ready Timer status
+ */
+static ssize_t mode_ch_tim_en_show(struct device *_dev,
+                                  struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       return sprintf(buf, "Mode Change Ready Timer Enable = 0x%x\n",
+                      dwc_otg_get_mode_ch_tim(otg_dev->core_if));
+}
+
+/**
+ * Set the Mode Change Ready Timer status
+ */
+static ssize_t mode_ch_tim_en_store(struct device *_dev,
+                                   struct device_attribute *attr,
+                                   const char *buf, size_t count)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t in = simple_strtoul(buf, NULL, 16);
+       dwc_otg_set_mode_ch_tim(otg_dev->core_if, in);
+       return count;
+}
+
+DEVICE_ATTR(mode_ch_tim_en, 0644, mode_ch_tim_en_show, mode_ch_tim_en_store);
+
+/**
+ * Show the value of HFIR Frame Interval bitfield
+ */
+static ssize_t fr_interval_show(struct device *_dev,
+                               struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       return sprintf(buf, "Frame Interval = 0x%x\n",
+                      dwc_otg_get_fr_interval(otg_dev->core_if));
+}
+
+/**
+ * Set the HFIR Frame Interval value
+ */
+static ssize_t fr_interval_store(struct device *_dev,
+                                struct device_attribute *attr,
+                                const char *buf, size_t count)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t in = simple_strtoul(buf, NULL, 10);
+       dwc_otg_set_fr_interval(otg_dev->core_if, in);
+       return count;
+}
+
+DEVICE_ATTR(fr_interval, 0644, fr_interval_show, fr_interval_store);
+
+/**
+ * Show the status of Remote Wakeup.
+ */
+static ssize_t remote_wakeup_show(struct device *_dev,
+                                 struct device_attribute *attr, char *buf)
+{
+#ifndef DWC_HOST_ONLY
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+
+       return sprintf(buf,
+                      "Remote Wakeup Sig = %d Enabled = %d LPM Remote Wakeup = %d\n",
+                      dwc_otg_get_remotewakesig(otg_dev->core_if),
+                      dwc_otg_pcd_get_rmwkup_enable(otg_dev->pcd),
+                      dwc_otg_get_lpm_remotewakeenabled(otg_dev->core_if));
+#else
+       return sprintf(buf, "Host Only Mode!\n");
+#endif /* DWC_HOST_ONLY */
+}
+
+/**
+ * Initiate a remote wakeup of the host.  The Device control register
+ * Remote Wakeup Signal bit is written if the PCD Remote wakeup enable
+ * flag is set.
+ *
+ */
+static ssize_t remote_wakeup_store(struct device *_dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t count)
+{
+#ifndef DWC_HOST_ONLY
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t val = simple_strtoul(buf, NULL, 16);
+
+       if (val & 1) {
+               dwc_otg_pcd_remote_wakeup(otg_dev->pcd, 1);
+       } else {
+               dwc_otg_pcd_remote_wakeup(otg_dev->pcd, 0);
+       }
+#endif /* DWC_HOST_ONLY */
+       return count;
+}
+
+DEVICE_ATTR(remote_wakeup, S_IRUGO | S_IWUSR, remote_wakeup_show,
+           remote_wakeup_store);
+
+/**
+ * Show the whether core is hibernated or not.
+ */
+static ssize_t rem_wakeup_pwrdn_show(struct device *_dev,
+                                    struct device_attribute *attr, char *buf)
+{
+#ifndef DWC_HOST_ONLY
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+
+       if (dwc_otg_get_core_state(otg_dev->core_if)) {
+               DWC_PRINTF("Core is in hibernation\n");
+       } else {
+               DWC_PRINTF("Core is not in hibernation\n");
+       }
+#endif /* DWC_HOST_ONLY */
+       return 0;
+}
+
+extern int dwc_otg_device_hibernation_restore(dwc_otg_core_if_t * core_if,
+                                             int rem_wakeup, int reset);
+
+/**
+ * Initiate a remote wakeup of the device to exit from hibernation.
+ */
+static ssize_t rem_wakeup_pwrdn_store(struct device *_dev,
+                                     struct device_attribute *attr,
+                                     const char *buf, size_t count)
+{
+#ifndef DWC_HOST_ONLY
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       dwc_otg_device_hibernation_restore(otg_dev->core_if, 1, 0);
+#endif
+       return count;
+}
+
+DEVICE_ATTR(rem_wakeup_pwrdn, S_IRUGO | S_IWUSR, rem_wakeup_pwrdn_show,
+           rem_wakeup_pwrdn_store);
+
+static ssize_t disconnect_us(struct device *_dev,
+                            struct device_attribute *attr,
+                            const char *buf, size_t count)
+{
+
+#ifndef DWC_HOST_ONLY
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t val = simple_strtoul(buf, NULL, 16);
+       DWC_PRINTF("The Passed value is %04x\n", val);
+
+       dwc_otg_pcd_disconnect_us(otg_dev->pcd, 50);
+
+#endif /* DWC_HOST_ONLY */
+       return count;
+}
+
+DEVICE_ATTR(disconnect_us, S_IWUSR, 0, disconnect_us);
+
+/**
+ * Dump global registers and either host or device registers (depending on the
+ * current mode of the core).
+ */
+static ssize_t regdump_show(struct device *_dev,
+                           struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+
+       dwc_otg_dump_global_registers(otg_dev->core_if);
+       if (dwc_otg_is_host_mode(otg_dev->core_if)) {
+               dwc_otg_dump_host_registers(otg_dev->core_if);
+       } else {
+               dwc_otg_dump_dev_registers(otg_dev->core_if);
+
+       }
+       return sprintf(buf, "Register Dump\n");
+}
+
+DEVICE_ATTR(regdump, S_IRUGO, regdump_show, 0);
+
+/**
+ * Dump global registers and either host or device registers (depending on the
+ * current mode of the core).
+ */
+static ssize_t spramdump_show(struct device *_dev,
+                             struct device_attribute *attr, char *buf)
+{
+#if 0
+       dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+
+       dwc_otg_dump_spram(otg_dev->core_if);
+#endif
+
+       return sprintf(buf, "SPRAM Dump\n");
+}
+
+DEVICE_ATTR(spramdump, S_IRUGO, spramdump_show, 0);
+
+/**
+ * Dump the current hcd state.
+ */
+static ssize_t hcddump_show(struct device *_dev,
+                           struct device_attribute *attr, char *buf)
+{
+#ifndef DWC_DEVICE_ONLY
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       dwc_otg_hcd_dump_state(otg_dev->hcd);
+#endif /* DWC_DEVICE_ONLY */
+       return sprintf(buf, "HCD Dump\n");
+}
+
+DEVICE_ATTR(hcddump, S_IRUGO, hcddump_show, 0);
+
+/**
+ * Dump the average frame remaining at SOF. This can be used to
+ * determine average interrupt latency. Frame remaining is also shown for
+ * start transfer and two additional sample points.
+ */
+static ssize_t hcd_frrem_show(struct device *_dev,
+                             struct device_attribute *attr, char *buf)
+{
+#ifndef DWC_DEVICE_ONLY
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+
+       dwc_otg_hcd_dump_frrem(otg_dev->hcd);
+#endif /* DWC_DEVICE_ONLY */
+       return sprintf(buf, "HCD Dump Frame Remaining\n");
+}
+
+DEVICE_ATTR(hcd_frrem, S_IRUGO, hcd_frrem_show, 0);
+
+/**
+ * Displays the time required to read the GNPTXFSIZ register many times (the
+ * output shows the number of times the register is read).
+ */
+#define RW_REG_COUNT 10000000
+#define MSEC_PER_JIFFIE 1000/HZ
+static ssize_t rd_reg_test_show(struct device *_dev,
+                               struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       int i;
+       int time;
+       int start_jiffies;
+
+       printk("HZ %d, MSEC_PER_JIFFIE %d, loops_per_jiffy %lu\n",
+              HZ, MSEC_PER_JIFFIE, loops_per_jiffy);
+       start_jiffies = jiffies;
+       for (i = 0; i < RW_REG_COUNT; i++) {
+               dwc_otg_get_gnptxfsiz(otg_dev->core_if);
+       }
+       time = jiffies - start_jiffies;
+       return sprintf(buf,
+                      "Time to read GNPTXFSIZ reg %d times: %d msecs (%d jiffies)\n",
+                      RW_REG_COUNT, time * MSEC_PER_JIFFIE, time);
+}
+
+DEVICE_ATTR(rd_reg_test, S_IRUGO, rd_reg_test_show, 0);
+
+/**
+ * Displays the time required to write the GNPTXFSIZ register many times (the
+ * output shows the number of times the register is written).
+ */
+static ssize_t wr_reg_test_show(struct device *_dev,
+                               struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t reg_val;
+       int i;
+       int time;
+       int start_jiffies;
+
+       printk("HZ %d, MSEC_PER_JIFFIE %d, loops_per_jiffy %lu\n",
+              HZ, MSEC_PER_JIFFIE, loops_per_jiffy);
+       reg_val = dwc_otg_get_gnptxfsiz(otg_dev->core_if);
+       start_jiffies = jiffies;
+       for (i = 0; i < RW_REG_COUNT; i++) {
+               dwc_otg_set_gnptxfsiz(otg_dev->core_if, reg_val);
+       }
+       time = jiffies - start_jiffies;
+       return sprintf(buf,
+                      "Time to write GNPTXFSIZ reg %d times: %d msecs (%d jiffies)\n",
+                      RW_REG_COUNT, time * MSEC_PER_JIFFIE, time);
+}
+
+DEVICE_ATTR(wr_reg_test, S_IRUGO, wr_reg_test_show, 0);
+
+#ifdef CONFIG_USB_DWC_OTG_LPM
+
+/**
+* Show the lpm_response attribute.
+*/
+static ssize_t lpmresp_show(struct device *_dev,
+                           struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+
+       if (!dwc_otg_get_param_lpm_enable(otg_dev->core_if))
+               return sprintf(buf, "** LPM is DISABLED **\n");
+
+       if (!dwc_otg_is_device_mode(otg_dev->core_if)) {
+               return sprintf(buf, "** Current mode is not device mode\n");
+       }
+       return sprintf(buf, "lpm_response = %d\n",
+                      dwc_otg_get_lpmresponse(otg_dev->core_if));
+}
+
+/**
+* Store the lpm_response attribute.
+*/
+static ssize_t lpmresp_store(struct device *_dev,
+                            struct device_attribute *attr,
+                            const char *buf, size_t count)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       uint32_t val = simple_strtoul(buf, NULL, 16);
+
+       if (!dwc_otg_get_param_lpm_enable(otg_dev->core_if)) {
+               return 0;
+       }
+
+       if (!dwc_otg_is_device_mode(otg_dev->core_if)) {
+               return 0;
+       }
+
+       dwc_otg_set_lpmresponse(otg_dev->core_if, val);
+       return count;
+}
+
+DEVICE_ATTR(lpm_response, S_IRUGO | S_IWUSR, lpmresp_show, lpmresp_store);
+
+/**
+* Show the sleep_status attribute.
+*/
+static ssize_t sleepstatus_show(struct device *_dev,
+                               struct device_attribute *attr, char *buf)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       return sprintf(buf, "Sleep Status = %d\n",
+                      dwc_otg_get_lpm_portsleepstatus(otg_dev->core_if));
+}
+
+/**
+ * Store the sleep_status attribure.
+ */
+static ssize_t sleepstatus_store(struct device *_dev,
+                                struct device_attribute *attr,
+                                const char *buf, size_t count)
+{
+        dwc_otg_device_t *otg_dev = dwc_otg_drvdev(_dev);
+       dwc_otg_core_if_t *core_if = otg_dev->core_if;
+
+       if (dwc_otg_get_lpm_portsleepstatus(otg_dev->core_if)) {
+               if (dwc_otg_is_host_mode(core_if)) {
+
+                       DWC_PRINTF("Host initiated resume\n");
+                       dwc_otg_set_prtresume(otg_dev->core_if, 1);
+               }
+       }
+
+       return count;
+}
+
+DEVICE_ATTR(sleep_status, S_IRUGO | S_IWUSR, sleepstatus_show,
+           sleepstatus_store);
+
+#endif /* CONFIG_USB_DWC_OTG_LPM_ENABLE */
+
+/**@}*/
+
+/**
+ * Create the device files
+ */
+void dwc_otg_attr_create(
+#ifdef LM_INTERFACE
+       struct lm_device *dev
+#elif  defined(PCI_INTERFACE)
+       struct pci_dev *dev
+#elif  defined(PLATFORM_INTERFACE)
+        struct platform_device *dev
+#endif
+    )
+{
+       int error;
+
+       error = device_create_file(&dev->dev, &dev_attr_regoffset);
+       error = device_create_file(&dev->dev, &dev_attr_regvalue);
+       error = device_create_file(&dev->dev, &dev_attr_mode);
+       error = device_create_file(&dev->dev, &dev_attr_hnpcapable);
+       error = device_create_file(&dev->dev, &dev_attr_srpcapable);
+       error = device_create_file(&dev->dev, &dev_attr_hsic_connect);
+       error = device_create_file(&dev->dev, &dev_attr_inv_sel_hsic);
+       error = device_create_file(&dev->dev, &dev_attr_hnp);
+       error = device_create_file(&dev->dev, &dev_attr_srp);
+       error = device_create_file(&dev->dev, &dev_attr_buspower);
+       error = device_create_file(&dev->dev, &dev_attr_bussuspend);
+       error = device_create_file(&dev->dev, &dev_attr_mode_ch_tim_en);
+       error = device_create_file(&dev->dev, &dev_attr_fr_interval);
+       error = device_create_file(&dev->dev, &dev_attr_busconnected);
+       error = device_create_file(&dev->dev, &dev_attr_gotgctl);
+       error = device_create_file(&dev->dev, &dev_attr_gusbcfg);
+       error = device_create_file(&dev->dev, &dev_attr_grxfsiz);
+       error = device_create_file(&dev->dev, &dev_attr_gnptxfsiz);
+       error = device_create_file(&dev->dev, &dev_attr_gpvndctl);
+       error = device_create_file(&dev->dev, &dev_attr_ggpio);
+       error = device_create_file(&dev->dev, &dev_attr_guid);
+       error = device_create_file(&dev->dev, &dev_attr_gsnpsid);
+       error = device_create_file(&dev->dev, &dev_attr_devspeed);
+       error = device_create_file(&dev->dev, &dev_attr_enumspeed);
+       error = device_create_file(&dev->dev, &dev_attr_hptxfsiz);
+       error = device_create_file(&dev->dev, &dev_attr_hprt0);
+       error = device_create_file(&dev->dev, &dev_attr_remote_wakeup);
+       error = device_create_file(&dev->dev, &dev_attr_rem_wakeup_pwrdn);
+       error = device_create_file(&dev->dev, &dev_attr_disconnect_us);
+       error = device_create_file(&dev->dev, &dev_attr_regdump);
+       error = device_create_file(&dev->dev, &dev_attr_spramdump);
+       error = device_create_file(&dev->dev, &dev_attr_hcddump);
+       error = device_create_file(&dev->dev, &dev_attr_hcd_frrem);
+       error = device_create_file(&dev->dev, &dev_attr_rd_reg_test);
+       error = device_create_file(&dev->dev, &dev_attr_wr_reg_test);
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       error = device_create_file(&dev->dev, &dev_attr_lpm_response);
+       error = device_create_file(&dev->dev, &dev_attr_sleep_status);
+#endif
+}
+
+/**
+ * Remove the device files
+ */
+void dwc_otg_attr_remove(
+#ifdef LM_INTERFACE
+       struct lm_device *dev
+#elif  defined(PCI_INTERFACE)
+       struct pci_dev *dev
+#elif  defined(PLATFORM_INTERFACE)
+       struct platform_device *dev
+#endif
+    )
+{
+       device_remove_file(&dev->dev, &dev_attr_regoffset);
+       device_remove_file(&dev->dev, &dev_attr_regvalue);
+       device_remove_file(&dev->dev, &dev_attr_mode);
+       device_remove_file(&dev->dev, &dev_attr_hnpcapable);
+       device_remove_file(&dev->dev, &dev_attr_srpcapable);
+       device_remove_file(&dev->dev, &dev_attr_hsic_connect);
+       device_remove_file(&dev->dev, &dev_attr_inv_sel_hsic);
+       device_remove_file(&dev->dev, &dev_attr_hnp);
+       device_remove_file(&dev->dev, &dev_attr_srp);
+       device_remove_file(&dev->dev, &dev_attr_buspower);
+       device_remove_file(&dev->dev, &dev_attr_bussuspend);
+       device_remove_file(&dev->dev, &dev_attr_mode_ch_tim_en);
+       device_remove_file(&dev->dev, &dev_attr_fr_interval);
+       device_remove_file(&dev->dev, &dev_attr_busconnected);
+       device_remove_file(&dev->dev, &dev_attr_gotgctl);
+       device_remove_file(&dev->dev, &dev_attr_gusbcfg);
+       device_remove_file(&dev->dev, &dev_attr_grxfsiz);
+       device_remove_file(&dev->dev, &dev_attr_gnptxfsiz);
+       device_remove_file(&dev->dev, &dev_attr_gpvndctl);
+       device_remove_file(&dev->dev, &dev_attr_ggpio);
+       device_remove_file(&dev->dev, &dev_attr_guid);
+       device_remove_file(&dev->dev, &dev_attr_gsnpsid);
+       device_remove_file(&dev->dev, &dev_attr_devspeed);
+       device_remove_file(&dev->dev, &dev_attr_enumspeed);
+       device_remove_file(&dev->dev, &dev_attr_hptxfsiz);
+       device_remove_file(&dev->dev, &dev_attr_hprt0);
+       device_remove_file(&dev->dev, &dev_attr_remote_wakeup);
+       device_remove_file(&dev->dev, &dev_attr_rem_wakeup_pwrdn);
+       device_remove_file(&dev->dev, &dev_attr_disconnect_us);
+       device_remove_file(&dev->dev, &dev_attr_regdump);
+       device_remove_file(&dev->dev, &dev_attr_spramdump);
+       device_remove_file(&dev->dev, &dev_attr_hcddump);
+       device_remove_file(&dev->dev, &dev_attr_hcd_frrem);
+       device_remove_file(&dev->dev, &dev_attr_rd_reg_test);
+       device_remove_file(&dev->dev, &dev_attr_wr_reg_test);
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       device_remove_file(&dev->dev, &dev_attr_lpm_response);
+       device_remove_file(&dev->dev, &dev_attr_sleep_status);
+#endif
+}
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_attr.h
@@ -0,0 +1,89 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_attr.h $
+ * $Revision: #13 $
+ * $Date: 2010/06/21 $
+ * $Change: 1532021 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+#if !defined(__DWC_OTG_ATTR_H__)
+#define __DWC_OTG_ATTR_H__
+
+/** @file
+ * This file contains the interface to the Linux device attributes.
+ */
+extern struct device_attribute dev_attr_regoffset;
+extern struct device_attribute dev_attr_regvalue;
+
+extern struct device_attribute dev_attr_mode;
+extern struct device_attribute dev_attr_hnpcapable;
+extern struct device_attribute dev_attr_srpcapable;
+extern struct device_attribute dev_attr_hnp;
+extern struct device_attribute dev_attr_srp;
+extern struct device_attribute dev_attr_buspower;
+extern struct device_attribute dev_attr_bussuspend;
+extern struct device_attribute dev_attr_mode_ch_tim_en;
+extern struct device_attribute dev_attr_fr_interval;
+extern struct device_attribute dev_attr_busconnected;
+extern struct device_attribute dev_attr_gotgctl;
+extern struct device_attribute dev_attr_gusbcfg;
+extern struct device_attribute dev_attr_grxfsiz;
+extern struct device_attribute dev_attr_gnptxfsiz;
+extern struct device_attribute dev_attr_gpvndctl;
+extern struct device_attribute dev_attr_ggpio;
+extern struct device_attribute dev_attr_guid;
+extern struct device_attribute dev_attr_gsnpsid;
+extern struct device_attribute dev_attr_devspeed;
+extern struct device_attribute dev_attr_enumspeed;
+extern struct device_attribute dev_attr_hptxfsiz;
+extern struct device_attribute dev_attr_hprt0;
+#ifdef CONFIG_USB_DWC_OTG_LPM
+extern struct device_attribute dev_attr_lpm_response;
+extern struct device_attribute devi_attr_sleep_status;
+#endif
+
+void dwc_otg_attr_create(
+#ifdef LM_INTERFACE
+                               struct lm_device *dev
+#elif  defined(PCI_INTERFACE)
+                               struct pci_dev *dev
+#elif  defined(PLATFORM_INTERFACE)
+       struct platform_device *dev
+#endif
+    );
+
+void dwc_otg_attr_remove(
+#ifdef LM_INTERFACE
+                               struct lm_device *dev
+#elif  defined(PCI_INTERFACE)
+                               struct pci_dev *dev
+#elif  defined(PLATFORM_INTERFACE)
+       struct platform_device *dev
+#endif
+    );
+#endif
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_cfi.c
@@ -0,0 +1,1876 @@
+/* ==========================================================================
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+/** @file
+ *
+ * This file contains the most of the CFI(Core Feature Interface)
+ * implementation for the OTG.
+ */
+
+#ifdef DWC_UTE_CFI
+
+#include "dwc_otg_pcd.h"
+#include "dwc_otg_cfi.h"
+
+/** This definition should actually migrate to the Portability Library */
+#define DWC_CONSTANT_CPU_TO_LE16(x) (x)
+
+extern dwc_otg_pcd_ep_t *get_ep_by_addr(dwc_otg_pcd_t * pcd, u16 wIndex);
+
+static int cfi_core_features_buf(uint8_t * buf, uint16_t buflen);
+static int cfi_get_feature_value(uint8_t * buf, uint16_t buflen,
+                                struct dwc_otg_pcd *pcd,
+                                struct cfi_usb_ctrlrequest *ctrl_req);
+static int cfi_set_feature_value(struct dwc_otg_pcd *pcd);
+static int cfi_ep_get_sg_val(uint8_t * buf, struct dwc_otg_pcd *pcd,
+                            struct cfi_usb_ctrlrequest *req);
+static int cfi_ep_get_concat_val(uint8_t * buf, struct dwc_otg_pcd *pcd,
+                                struct cfi_usb_ctrlrequest *req);
+static int cfi_ep_get_align_val(uint8_t * buf, struct dwc_otg_pcd *pcd,
+                               struct cfi_usb_ctrlrequest *req);
+static int cfi_preproc_reset(struct dwc_otg_pcd *pcd,
+                            struct cfi_usb_ctrlrequest *req);
+static void cfi_free_ep_bs_dyn_data(cfi_ep_t * cfiep);
+
+static uint16_t get_dfifo_size(dwc_otg_core_if_t * core_if);
+static int32_t get_rxfifo_size(dwc_otg_core_if_t * core_if, uint16_t wValue);
+static int32_t get_txfifo_size(struct dwc_otg_pcd *pcd, uint16_t wValue);
+
+static uint8_t resize_fifos(dwc_otg_core_if_t * core_if);
+
+/** This is the header of the all features descriptor */
+static cfi_all_features_header_t all_props_desc_header = {
+       .wVersion = DWC_CONSTANT_CPU_TO_LE16(0x100),
+       .wCoreID = DWC_CONSTANT_CPU_TO_LE16(CFI_CORE_ID_OTG),
+       .wNumFeatures = DWC_CONSTANT_CPU_TO_LE16(9),
+};
+
+/** This is an array of statically allocated feature descriptors */
+static cfi_feature_desc_header_t prop_descs[] = {
+
+       /* FT_ID_DMA_MODE */
+       {
+        .wFeatureID = DWC_CONSTANT_CPU_TO_LE16(FT_ID_DMA_MODE),
+        .bmAttributes = CFI_FEATURE_ATTR_RW,
+        .wDataLength = DWC_CONSTANT_CPU_TO_LE16(1),
+        },
+
+       /* FT_ID_DMA_BUFFER_SETUP */
+       {
+        .wFeatureID = DWC_CONSTANT_CPU_TO_LE16(FT_ID_DMA_BUFFER_SETUP),
+        .bmAttributes = CFI_FEATURE_ATTR_RW,
+        .wDataLength = DWC_CONSTANT_CPU_TO_LE16(6),
+        },
+
+       /* FT_ID_DMA_BUFF_ALIGN */
+       {
+        .wFeatureID = DWC_CONSTANT_CPU_TO_LE16(FT_ID_DMA_BUFF_ALIGN),
+        .bmAttributes = CFI_FEATURE_ATTR_RW,
+        .wDataLength = DWC_CONSTANT_CPU_TO_LE16(2),
+        },
+
+       /* FT_ID_DMA_CONCAT_SETUP */
+       {
+        .wFeatureID = DWC_CONSTANT_CPU_TO_LE16(FT_ID_DMA_CONCAT_SETUP),
+        .bmAttributes = CFI_FEATURE_ATTR_RW,
+        //.wDataLength  = DWC_CONSTANT_CPU_TO_LE16(6),
+        },
+
+       /* FT_ID_DMA_CIRCULAR */
+       {
+        .wFeatureID = DWC_CONSTANT_CPU_TO_LE16(FT_ID_DMA_CIRCULAR),
+        .bmAttributes = CFI_FEATURE_ATTR_RW,
+        .wDataLength = DWC_CONSTANT_CPU_TO_LE16(6),
+        },
+
+       /* FT_ID_THRESHOLD_SETUP */
+       {
+        .wFeatureID = DWC_CONSTANT_CPU_TO_LE16(FT_ID_THRESHOLD_SETUP),
+        .bmAttributes = CFI_FEATURE_ATTR_RW,
+        .wDataLength = DWC_CONSTANT_CPU_TO_LE16(6),
+        },
+
+       /* FT_ID_DFIFO_DEPTH */
+       {
+        .wFeatureID = DWC_CONSTANT_CPU_TO_LE16(FT_ID_DFIFO_DEPTH),
+        .bmAttributes = CFI_FEATURE_ATTR_RO,
+        .wDataLength = DWC_CONSTANT_CPU_TO_LE16(2),
+        },
+
+       /* FT_ID_TX_FIFO_DEPTH */
+       {
+        .wFeatureID = DWC_CONSTANT_CPU_TO_LE16(FT_ID_TX_FIFO_DEPTH),
+        .bmAttributes = CFI_FEATURE_ATTR_RW,
+        .wDataLength = DWC_CONSTANT_CPU_TO_LE16(2),
+        },
+
+       /* FT_ID_RX_FIFO_DEPTH */
+       {
+        .wFeatureID = DWC_CONSTANT_CPU_TO_LE16(FT_ID_RX_FIFO_DEPTH),
+        .bmAttributes = CFI_FEATURE_ATTR_RW,
+        .wDataLength = DWC_CONSTANT_CPU_TO_LE16(2),
+        }
+};
+
+/** The table of feature names */
+cfi_string_t prop_name_table[] = {
+       {FT_ID_DMA_MODE, "dma_mode"},
+       {FT_ID_DMA_BUFFER_SETUP, "buffer_setup"},
+       {FT_ID_DMA_BUFF_ALIGN, "buffer_align"},
+       {FT_ID_DMA_CONCAT_SETUP, "concat_setup"},
+       {FT_ID_DMA_CIRCULAR, "buffer_circular"},
+       {FT_ID_THRESHOLD_SETUP, "threshold_setup"},
+       {FT_ID_DFIFO_DEPTH, "dfifo_depth"},
+       {FT_ID_TX_FIFO_DEPTH, "txfifo_depth"},
+       {FT_ID_RX_FIFO_DEPTH, "rxfifo_depth"},
+       {}
+};
+
+/************************************************************************/
+
+/**
+ * Returns the name of the feature by its ID
+ * or NULL if no featute ID matches.
+ *
+ */
+const uint8_t *get_prop_name(uint16_t prop_id, int *len)
+{
+       cfi_string_t *pstr;
+       *len = 0;
+
+       for (pstr = prop_name_table; pstr && pstr->s; pstr++) {
+               if (pstr->id == prop_id) {
+                       *len = DWC_STRLEN(pstr->s);
+                       return pstr->s;
+               }
+       }
+       return NULL;
+}
+
+/**
+ * This function handles all CFI specific control requests.
+ *
+ * Return a negative value to stall the DCE.
+ */
+int cfi_setup(struct dwc_otg_pcd *pcd, struct cfi_usb_ctrlrequest *ctrl)
+{
+       int retval = 0;
+       dwc_otg_pcd_ep_t *ep = NULL;
+       cfiobject_t *cfi = pcd->cfi;
+       struct dwc_otg_core_if *coreif = GET_CORE_IF(pcd);
+       uint16_t wLen = DWC_LE16_TO_CPU(&ctrl->wLength);
+       uint16_t wValue = DWC_LE16_TO_CPU(&ctrl->wValue);
+       uint16_t wIndex = DWC_LE16_TO_CPU(&ctrl->wIndex);
+       uint32_t regaddr = 0;
+       uint32_t regval = 0;
+
+       /* Save this Control Request in the CFI object.
+        * The data field will be assigned in the data stage completion CB function.
+        */
+       cfi->ctrl_req = *ctrl;
+       cfi->ctrl_req.data = NULL;
+
+       cfi->need_gadget_att = 0;
+       cfi->need_status_in_complete = 0;
+
+       switch (ctrl->bRequest) {
+       case VEN_CORE_GET_FEATURES:
+               retval = cfi_core_features_buf(cfi->buf_in.buf, CFI_IN_BUF_LEN);
+               if (retval >= 0) {
+                       //dump_msg(cfi->buf_in.buf, retval);
+                       ep = &pcd->ep0;
+
+                       retval = min((uint16_t) retval, wLen);
+                       /* Transfer this buffer to the host through the EP0-IN EP */
+                       ep->dwc_ep.dma_addr = cfi->buf_in.addr;
+                       ep->dwc_ep.start_xfer_buff = cfi->buf_in.buf;
+                       ep->dwc_ep.xfer_buff = cfi->buf_in.buf;
+                       ep->dwc_ep.xfer_len = retval;
+                       ep->dwc_ep.xfer_count = 0;
+                       ep->dwc_ep.sent_zlp = 0;
+                       ep->dwc_ep.total_len = ep->dwc_ep.xfer_len;
+
+                       pcd->ep0_pending = 1;
+                       dwc_otg_ep0_start_transfer(coreif, &ep->dwc_ep);
+               }
+               retval = 0;
+               break;
+
+       case VEN_CORE_GET_FEATURE:
+               CFI_INFO("VEN_CORE_GET_FEATURE\n");
+               retval = cfi_get_feature_value(cfi->buf_in.buf, CFI_IN_BUF_LEN,
+                                              pcd, ctrl);
+               if (retval >= 0) {
+                       ep = &pcd->ep0;
+
+                       retval = min((uint16_t) retval, wLen);
+                       /* Transfer this buffer to the host through the EP0-IN EP */
+                       ep->dwc_ep.dma_addr = cfi->buf_in.addr;
+                       ep->dwc_ep.start_xfer_buff = cfi->buf_in.buf;
+                       ep->dwc_ep.xfer_buff = cfi->buf_in.buf;
+                       ep->dwc_ep.xfer_len = retval;
+                       ep->dwc_ep.xfer_count = 0;
+                       ep->dwc_ep.sent_zlp = 0;
+                       ep->dwc_ep.total_len = ep->dwc_ep.xfer_len;
+
+                       pcd->ep0_pending = 1;
+                       dwc_otg_ep0_start_transfer(coreif, &ep->dwc_ep);
+               }
+               CFI_INFO("VEN_CORE_GET_FEATURE=%d\n", retval);
+               dump_msg(cfi->buf_in.buf, retval);
+               break;
+
+       case VEN_CORE_SET_FEATURE:
+               CFI_INFO("VEN_CORE_SET_FEATURE\n");
+               /* Set up an XFER to get the data stage of the control request,
+                * which is the new value of the feature to be modified.
+                */
+               ep = &pcd->ep0;
+               ep->dwc_ep.is_in = 0;
+               ep->dwc_ep.dma_addr = cfi->buf_out.addr;
+               ep->dwc_ep.start_xfer_buff = cfi->buf_out.buf;
+               ep->dwc_ep.xfer_buff = cfi->buf_out.buf;
+               ep->dwc_ep.xfer_len = wLen;
+               ep->dwc_ep.xfer_count = 0;
+               ep->dwc_ep.sent_zlp = 0;
+               ep->dwc_ep.total_len = ep->dwc_ep.xfer_len;
+
+               pcd->ep0_pending = 1;
+               /* Read the control write's data stage */
+               dwc_otg_ep0_start_transfer(coreif, &ep->dwc_ep);
+               retval = 0;
+               break;
+
+       case VEN_CORE_RESET_FEATURES:
+               CFI_INFO("VEN_CORE_RESET_FEATURES\n");
+               cfi->need_gadget_att = 1;
+               cfi->need_status_in_complete = 1;
+               retval = cfi_preproc_reset(pcd, ctrl);
+               CFI_INFO("VEN_CORE_RESET_FEATURES = (%d)\n", retval);
+               break;
+
+       case VEN_CORE_ACTIVATE_FEATURES:
+               CFI_INFO("VEN_CORE_ACTIVATE_FEATURES\n");
+               break;
+
+       case VEN_CORE_READ_REGISTER:
+               CFI_INFO("VEN_CORE_READ_REGISTER\n");
+               /* wValue optionally contains the HI WORD of the register offset and
+                * wIndex contains the LOW WORD of the register offset
+                */
+               if (wValue == 0) {
+                       /* @TODO - MAS - fix the access to the base field */
+                       regaddr = 0;
+                       //regaddr = (uint32_t) pcd->otg_dev->os_dep.base;
+                       //GET_CORE_IF(pcd)->co
+                       regaddr |= wIndex;
+               } else {
+                       regaddr = (wValue << 16) | wIndex;
+               }
+
+               /* Read a 32-bit value of the memory at the regaddr */
+               regval = DWC_READ_REG32((uint32_t *) regaddr);
+
+               ep = &pcd->ep0;
+               dwc_memcpy(cfi->buf_in.buf, &regval, sizeof(uint32_t));
+               ep->dwc_ep.is_in = 1;
+               ep->dwc_ep.dma_addr = cfi->buf_in.addr;
+               ep->dwc_ep.start_xfer_buff = cfi->buf_in.buf;
+               ep->dwc_ep.xfer_buff = cfi->buf_in.buf;
+               ep->dwc_ep.xfer_len = wLen;
+               ep->dwc_ep.xfer_count = 0;
+               ep->dwc_ep.sent_zlp = 0;
+               ep->dwc_ep.total_len = ep->dwc_ep.xfer_len;
+
+               pcd->ep0_pending = 1;
+               dwc_otg_ep0_start_transfer(coreif, &ep->dwc_ep);
+               cfi->need_gadget_att = 0;
+               retval = 0;
+               break;
+
+       case VEN_CORE_WRITE_REGISTER:
+               CFI_INFO("VEN_CORE_WRITE_REGISTER\n");
+               /* Set up an XFER to get the data stage of the control request,
+                * which is the new value of the register to be modified.
+                */
+               ep = &pcd->ep0;
+               ep->dwc_ep.is_in = 0;
+               ep->dwc_ep.dma_addr = cfi->buf_out.addr;
+               ep->dwc_ep.start_xfer_buff = cfi->buf_out.buf;
+               ep->dwc_ep.xfer_buff = cfi->buf_out.buf;
+               ep->dwc_ep.xfer_len = wLen;
+               ep->dwc_ep.xfer_count = 0;
+               ep->dwc_ep.sent_zlp = 0;
+               ep->dwc_ep.total_len = ep->dwc_ep.xfer_len;
+
+               pcd->ep0_pending = 1;
+               /* Read the control write's data stage */
+               dwc_otg_ep0_start_transfer(coreif, &ep->dwc_ep);
+               retval = 0;
+               break;
+
+       default:
+               retval = -DWC_E_NOT_SUPPORTED;
+               break;
+       }
+
+       return retval;
+}
+
+/**
+ * This function prepares the core features descriptors and copies its
+ * raw representation into the buffer <buf>.
+ *
+ * The buffer structure is as follows:
+ *     all_features_header (8 bytes)
+ *     features_#1 (8 bytes + feature name string length)
+ *     features_#2 (8 bytes + feature name string length)
+ *     .....
+ *     features_#n - where n=the total count of feature descriptors
+ */
+static int cfi_core_features_buf(uint8_t * buf, uint16_t buflen)
+{
+       cfi_feature_desc_header_t *prop_hdr = prop_descs;
+       cfi_feature_desc_header_t *prop;
+       cfi_all_features_header_t *all_props_hdr = &all_props_desc_header;
+       cfi_all_features_header_t *tmp;
+       uint8_t *tmpbuf = buf;
+       const uint8_t *pname = NULL;
+       int i, j, namelen = 0, totlen;
+
+       /* Prepare and copy the core features into the buffer */
+       CFI_INFO("%s:\n", __func__);
+
+       tmp = (cfi_all_features_header_t *) tmpbuf;
+       *tmp = *all_props_hdr;
+       tmpbuf += CFI_ALL_FEATURES_HDR_LEN;
+
+       j = sizeof(prop_descs) / sizeof(cfi_all_features_header_t);
+       for (i = 0; i < j; i++, prop_hdr++) {
+               pname = get_prop_name(prop_hdr->wFeatureID, &namelen);
+               prop = (cfi_feature_desc_header_t *) tmpbuf;
+               *prop = *prop_hdr;
+
+               prop->bNameLen = namelen;
+               prop->wLength =
+                   DWC_CONSTANT_CPU_TO_LE16(CFI_FEATURE_DESC_HDR_LEN +
+                                            namelen);
+
+               tmpbuf += CFI_FEATURE_DESC_HDR_LEN;
+               dwc_memcpy(tmpbuf, pname, namelen);
+               tmpbuf += namelen;
+       }
+
+       totlen = tmpbuf - buf;
+
+       if (totlen > 0) {
+               tmp = (cfi_all_features_header_t *) buf;
+               tmp->wTotalLen = DWC_CONSTANT_CPU_TO_LE16(totlen);
+       }
+
+       return totlen;
+}
+
+/**
+ * This function releases all the dynamic memory in the CFI object.
+ */
+static void cfi_release(cfiobject_t * cfiobj)
+{
+       cfi_ep_t *cfiep;
+       dwc_list_link_t *tmp;
+
+       CFI_INFO("%s\n", __func__);
+
+       if (cfiobj->buf_in.buf) {
+               DWC_DMA_FREE(CFI_IN_BUF_LEN, cfiobj->buf_in.buf,
+                            cfiobj->buf_in.addr);
+               cfiobj->buf_in.buf = NULL;
+       }
+
+       if (cfiobj->buf_out.buf) {
+               DWC_DMA_FREE(CFI_OUT_BUF_LEN, cfiobj->buf_out.buf,
+                            cfiobj->buf_out.addr);
+               cfiobj->buf_out.buf = NULL;
+       }
+
+       /* Free the Buffer Setup values for each EP */
+       //list_for_each_entry(cfiep, &cfiobj->active_eps, lh) {
+       DWC_LIST_FOREACH(tmp, &cfiobj->active_eps) {
+               cfiep = DWC_LIST_ENTRY(tmp, struct cfi_ep, lh);
+               cfi_free_ep_bs_dyn_data(cfiep);
+       }
+}
+
+/**
+ * This function frees the dynamically allocated EP buffer setup data.
+ */
+static void cfi_free_ep_bs_dyn_data(cfi_ep_t * cfiep)
+{
+       if (cfiep->bm_sg) {
+               DWC_FREE(cfiep->bm_sg);
+               cfiep->bm_sg = NULL;
+       }
+
+       if (cfiep->bm_align) {
+               DWC_FREE(cfiep->bm_align);
+               cfiep->bm_align = NULL;
+       }
+
+       if (cfiep->bm_concat) {
+               if (NULL != cfiep->bm_concat->wTxBytes) {
+                       DWC_FREE(cfiep->bm_concat->wTxBytes);
+                       cfiep->bm_concat->wTxBytes = NULL;
+               }
+               DWC_FREE(cfiep->bm_concat);
+               cfiep->bm_concat = NULL;
+       }
+}
+
+/**
+ * This function initializes the default values of the features
+ * for a specific endpoint and should be called only once when
+ * the EP is enabled first time.
+ */
+static int cfi_ep_init_defaults(struct dwc_otg_pcd *pcd, cfi_ep_t * cfiep)
+{
+       int retval = 0;
+
+       cfiep->bm_sg = DWC_ALLOC(sizeof(ddma_sg_buffer_setup_t));
+       if (NULL == cfiep->bm_sg) {
+               CFI_INFO("Failed to allocate memory for SG feature value\n");
+               return -DWC_E_NO_MEMORY;
+       }
+       dwc_memset(cfiep->bm_sg, 0, sizeof(ddma_sg_buffer_setup_t));
+
+       /* For the Concatenation feature's default value we do not allocate
+        * memory for the wTxBytes field - it will be done in the set_feature_value
+        * request handler.
+        */
+       cfiep->bm_concat = DWC_ALLOC(sizeof(ddma_concat_buffer_setup_t));
+       if (NULL == cfiep->bm_concat) {
+               CFI_INFO
+                   ("Failed to allocate memory for CONCATENATION feature value\n");
+               DWC_FREE(cfiep->bm_sg);
+               return -DWC_E_NO_MEMORY;
+       }
+       dwc_memset(cfiep->bm_concat, 0, sizeof(ddma_concat_buffer_setup_t));
+
+       cfiep->bm_align = DWC_ALLOC(sizeof(ddma_align_buffer_setup_t));
+       if (NULL == cfiep->bm_align) {
+               CFI_INFO
+                   ("Failed to allocate memory for Alignment feature value\n");
+               DWC_FREE(cfiep->bm_sg);
+               DWC_FREE(cfiep->bm_concat);
+               return -DWC_E_NO_MEMORY;
+       }
+       dwc_memset(cfiep->bm_align, 0, sizeof(ddma_align_buffer_setup_t));
+
+       return retval;
+}
+
+/**
+ * The callback function that notifies the CFI on the activation of
+ * an endpoint in the PCD. The following steps are done in this function:
+ *
+ *     Create a dynamically allocated cfi_ep_t object (a CFI wrapper to the PCD's
+ *             active endpoint)
+ *     Create MAX_DMA_DESCS_PER_EP count DMA Descriptors for the EP
+ *     Set the Buffer Mode to standard
+ *     Initialize the default values for all EP modes (SG, Circular, Concat, Align)
+ *     Add the cfi_ep_t object to the list of active endpoints in the CFI object
+ */
+static int cfi_ep_enable(struct cfiobject *cfi, struct dwc_otg_pcd *pcd,
+                        struct dwc_otg_pcd_ep *ep)
+{
+       cfi_ep_t *cfiep;
+       int retval = -DWC_E_NOT_SUPPORTED;
+
+       CFI_INFO("%s: epname=%s; epnum=0x%02x\n", __func__,
+                "EP_" /*ep->ep.name */ , ep->desc->bEndpointAddress);
+       /* MAS - Check whether this endpoint already is in the list */
+       cfiep = get_cfi_ep_by_pcd_ep(cfi, ep);
+
+       if (NULL == cfiep) {
+               /* Allocate a cfi_ep_t object */
+               cfiep = DWC_ALLOC(sizeof(cfi_ep_t));
+               if (NULL == cfiep) {
+                       CFI_INFO
+                           ("Unable to allocate memory for <cfiep> in function %s\n",
+                            __func__);
+                       return -DWC_E_NO_MEMORY;
+               }
+               dwc_memset(cfiep, 0, sizeof(cfi_ep_t));
+
+               /* Save the dwc_otg_pcd_ep pointer in the cfiep object */
+               cfiep->ep = ep;
+
+               /* Allocate the DMA Descriptors chain of MAX_DMA_DESCS_PER_EP count */
+               ep->dwc_ep.descs =
+                   DWC_DMA_ALLOC(MAX_DMA_DESCS_PER_EP *
+                                 sizeof(dwc_otg_dma_desc_t),
+                                 &ep->dwc_ep.descs_dma_addr);
+
+               if (NULL == ep->dwc_ep.descs) {
+                       DWC_FREE(cfiep);
+                       return -DWC_E_NO_MEMORY;
+               }
+
+               DWC_LIST_INIT(&cfiep->lh);
+
+               /* Set the buffer mode to BM_STANDARD. It will be modified
+                * when building descriptors for a specific buffer mode */
+               ep->dwc_ep.buff_mode = BM_STANDARD;
+
+               /* Create and initialize the default values for this EP's Buffer modes */
+               if ((retval = cfi_ep_init_defaults(pcd, cfiep)) < 0)
+                       return retval;
+
+               /* Add the cfi_ep_t object to the CFI object's list of active endpoints */
+               DWC_LIST_INSERT_TAIL(&cfi->active_eps, &cfiep->lh);
+               retval = 0;
+       } else {                /* The sought EP already is in the list */
+               CFI_INFO("%s: The sought EP already is in the list\n",
+                        __func__);
+       }
+
+       return retval;
+}
+
+/**
+ * This function is called when the data stage of a 3-stage Control Write request
+ * is complete.
+ *
+ */
+static int cfi_ctrl_write_complete(struct cfiobject *cfi,
+                                  struct dwc_otg_pcd *pcd)
+{
+       uint32_t addr, reg_value;
+       uint16_t wIndex, wValue;
+       uint8_t bRequest;
+       uint8_t *buf = cfi->buf_out.buf;
+       //struct usb_ctrlrequest *ctrl_req = &cfi->ctrl_req_saved;
+       struct cfi_usb_ctrlrequest *ctrl_req = &cfi->ctrl_req;
+       int retval = -DWC_E_NOT_SUPPORTED;
+
+       CFI_INFO("%s\n", __func__);
+
+       bRequest = ctrl_req->bRequest;
+       wIndex = DWC_CONSTANT_CPU_TO_LE16(ctrl_req->wIndex);
+       wValue = DWC_CONSTANT_CPU_TO_LE16(ctrl_req->wValue);
+
+       /*
+        * Save the pointer to the data stage in the ctrl_req's <data> field.
+        * The request should be already saved in the command stage by now.
+        */
+       ctrl_req->data = cfi->buf_out.buf;
+       cfi->need_status_in_complete = 0;
+       cfi->need_gadget_att = 0;
+
+       switch (bRequest) {
+       case VEN_CORE_WRITE_REGISTER:
+               /* The buffer contains raw data of the new value for the register */
+               reg_value = *((uint32_t *) buf);
+               if (wValue == 0) {
+                       addr = 0;
+                       //addr = (uint32_t) pcd->otg_dev->os_dep.base;
+                       addr += wIndex;
+               } else {
+                       addr = (wValue << 16) | wIndex;
+               }
+
+               //writel(reg_value, addr);
+
+               retval = 0;
+               cfi->need_status_in_complete = 1;
+               break;
+
+       case VEN_CORE_SET_FEATURE:
+               /* The buffer contains raw data of the new value of the feature */
+               retval = cfi_set_feature_value(pcd);
+               if (retval < 0)
+                       return retval;
+
+               cfi->need_status_in_complete = 1;
+               break;
+
+       default:
+               break;
+       }
+
+       return retval;
+}
+
+/**
+ * This function builds the DMA descriptors for the SG buffer mode.
+ */
+static void cfi_build_sg_descs(struct cfiobject *cfi, cfi_ep_t * cfiep,
+                              dwc_otg_pcd_request_t * req)
+{
+       struct dwc_otg_pcd_ep *ep = cfiep->ep;
+       ddma_sg_buffer_setup_t *sgval = cfiep->bm_sg;
+       struct dwc_otg_dma_desc *desc = cfiep->ep->dwc_ep.descs;
+       struct dwc_otg_dma_desc *desc_last = cfiep->ep->dwc_ep.descs;
+       dma_addr_t buff_addr = req->dma;
+       int i;
+       uint32_t txsize, off;
+
+       txsize = sgval->wSize;
+       off = sgval->bOffset;
+
+//      CFI_INFO("%s: %s TXSIZE=0x%08x; OFFSET=0x%08x\n",
+//              __func__, cfiep->ep->ep.name, txsize, off);
+
+       for (i = 0; i < sgval->bCount; i++) {
+               desc->status.b.bs = BS_HOST_BUSY;
+               desc->buf = buff_addr;
+               desc->status.b.l = 0;
+               desc->status.b.ioc = 0;
+               desc->status.b.sp = 0;
+               desc->status.b.bytes = txsize;
+               desc->status.b.bs = BS_HOST_READY;
+
+               /* Set the next address of the buffer */
+               buff_addr += txsize + off;
+               desc_last = desc;
+               desc++;
+       }
+
+       /* Set the last, ioc and sp bits on the Last DMA Descriptor */
+       desc_last->status.b.l = 1;
+       desc_last->status.b.ioc = 1;
+       desc_last->status.b.sp = ep->dwc_ep.sent_zlp;
+       /* Save the last DMA descriptor pointer */
+       cfiep->dma_desc_last = desc_last;
+       cfiep->desc_count = sgval->bCount;
+}
+
+/**
+ * This function builds the DMA descriptors for the Concatenation buffer mode.
+ */
+static void cfi_build_concat_descs(struct cfiobject *cfi, cfi_ep_t * cfiep,
+                                  dwc_otg_pcd_request_t * req)
+{
+       struct dwc_otg_pcd_ep *ep = cfiep->ep;
+       ddma_concat_buffer_setup_t *concatval = cfiep->bm_concat;
+       struct dwc_otg_dma_desc *desc = cfiep->ep->dwc_ep.descs;
+       struct dwc_otg_dma_desc *desc_last = cfiep->ep->dwc_ep.descs;
+       dma_addr_t buff_addr = req->dma;
+       int i;
+       uint16_t *txsize;
+
+       txsize = concatval->wTxBytes;
+
+       for (i = 0; i < concatval->hdr.bDescCount; i++) {
+               desc->buf = buff_addr;
+               desc->status.b.bs = BS_HOST_BUSY;
+               desc->status.b.l = 0;
+               desc->status.b.ioc = 0;
+               desc->status.b.sp = 0;
+               desc->status.b.bytes = *txsize;
+               desc->status.b.bs = BS_HOST_READY;
+
+               txsize++;
+               /* Set the next address of the buffer */
+               buff_addr += UGETW(ep->desc->wMaxPacketSize);
+               desc_last = desc;
+               desc++;
+       }
+
+       /* Set the last, ioc and sp bits on the Last DMA Descriptor */
+       desc_last->status.b.l = 1;
+       desc_last->status.b.ioc = 1;
+       desc_last->status.b.sp = ep->dwc_ep.sent_zlp;
+       cfiep->dma_desc_last = desc_last;
+       cfiep->desc_count = concatval->hdr.bDescCount;
+}
+
+/**
+ * This function builds the DMA descriptors for the Circular buffer mode
+ */
+static void cfi_build_circ_descs(struct cfiobject *cfi, cfi_ep_t * cfiep,
+                                dwc_otg_pcd_request_t * req)
+{
+       /* @todo: MAS - add implementation when this feature needs to be tested */
+}
+
+/**
+ * This function builds the DMA descriptors for the Alignment buffer mode
+ */
+static void cfi_build_align_descs(struct cfiobject *cfi, cfi_ep_t * cfiep,
+                                 dwc_otg_pcd_request_t * req)
+{
+       struct dwc_otg_pcd_ep *ep = cfiep->ep;
+       ddma_align_buffer_setup_t *alignval = cfiep->bm_align;
+       struct dwc_otg_dma_desc *desc = cfiep->ep->dwc_ep.descs;
+       dma_addr_t buff_addr = req->dma;
+
+       desc->status.b.bs = BS_HOST_BUSY;
+       desc->status.b.l = 1;
+       desc->status.b.ioc = 1;
+       desc->status.b.sp = ep->dwc_ep.sent_zlp;
+       desc->status.b.bytes = req->length;
+       /* Adjust the buffer alignment */
+       desc->buf = (buff_addr + alignval->bAlign);
+       desc->status.b.bs = BS_HOST_READY;
+       cfiep->dma_desc_last = desc;
+       cfiep->desc_count = 1;
+}
+
+/**
+ * This function builds the DMA descriptors chain for different modes of the
+ * buffer setup of an endpoint.
+ */
+static void cfi_build_descriptors(struct cfiobject *cfi,
+                                 struct dwc_otg_pcd *pcd,
+                                 struct dwc_otg_pcd_ep *ep,
+                                 dwc_otg_pcd_request_t * req)
+{
+       cfi_ep_t *cfiep;
+
+       /* Get the cfiep by the dwc_otg_pcd_ep */
+       cfiep = get_cfi_ep_by_pcd_ep(cfi, ep);
+       if (NULL == cfiep) {
+               CFI_INFO("%s: Unable to find a matching active endpoint\n",
+                        __func__);
+               return;
+       }
+
+       cfiep->xfer_len = req->length;
+
+       /* Iterate through all the DMA descriptors */
+       switch (cfiep->ep->dwc_ep.buff_mode) {
+       case BM_SG:
+               cfi_build_sg_descs(cfi, cfiep, req);
+               break;
+
+       case BM_CONCAT:
+               cfi_build_concat_descs(cfi, cfiep, req);
+               break;
+
+       case BM_CIRCULAR:
+               cfi_build_circ_descs(cfi, cfiep, req);
+               break;
+
+       case BM_ALIGN:
+               cfi_build_align_descs(cfi, cfiep, req);
+               break;
+
+       default:
+               break;
+       }
+}
+
+/**
+ * Allocate DMA buffer for different Buffer modes.
+ */
+static void *cfi_ep_alloc_buf(struct cfiobject *cfi, struct dwc_otg_pcd *pcd,
+                             struct dwc_otg_pcd_ep *ep, dma_addr_t * dma,
+                             unsigned size, gfp_t flags)
+{
+       return DWC_DMA_ALLOC(size, dma);
+}
+
+/**
+ * This function initializes the CFI object.
+ */
+int init_cfi(cfiobject_t * cfiobj)
+{
+       CFI_INFO("%s\n", __func__);
+
+       /* Allocate a buffer for IN XFERs */
+       cfiobj->buf_in.buf =
+           DWC_DMA_ALLOC(CFI_IN_BUF_LEN, &cfiobj->buf_in.addr);
+       if (NULL == cfiobj->buf_in.buf) {
+               CFI_INFO("Unable to allocate buffer for INs\n");
+               return -DWC_E_NO_MEMORY;
+       }
+
+       /* Allocate a buffer for OUT XFERs */
+       cfiobj->buf_out.buf =
+           DWC_DMA_ALLOC(CFI_OUT_BUF_LEN, &cfiobj->buf_out.addr);
+       if (NULL == cfiobj->buf_out.buf) {
+               CFI_INFO("Unable to allocate buffer for OUT\n");
+               return -DWC_E_NO_MEMORY;
+       }
+
+       /* Initialize the callback function pointers */
+       cfiobj->ops.release = cfi_release;
+       cfiobj->ops.ep_enable = cfi_ep_enable;
+       cfiobj->ops.ctrl_write_complete = cfi_ctrl_write_complete;
+       cfiobj->ops.build_descriptors = cfi_build_descriptors;
+       cfiobj->ops.ep_alloc_buf = cfi_ep_alloc_buf;
+
+       /* Initialize the list of active endpoints in the CFI object */
+       DWC_LIST_INIT(&cfiobj->active_eps);
+
+       return 0;
+}
+
+/**
+ * This function reads the required feature's current value into the buffer
+ *
+ * @retval: Returns negative as error, or the data length of the feature
+ */
+static int cfi_get_feature_value(uint8_t * buf, uint16_t buflen,
+                                struct dwc_otg_pcd *pcd,
+                                struct cfi_usb_ctrlrequest *ctrl_req)
+{
+       int retval = -DWC_E_NOT_SUPPORTED;
+       struct dwc_otg_core_if *coreif = GET_CORE_IF(pcd);
+       uint16_t dfifo, rxfifo, txfifo;
+
+       switch (ctrl_req->wIndex) {
+               /* Whether the DDMA is enabled or not */
+       case FT_ID_DMA_MODE:
+               *buf = (coreif->dma_enable && coreif->dma_desc_enable) ? 1 : 0;
+               retval = 1;
+               break;
+
+       case FT_ID_DMA_BUFFER_SETUP:
+               retval = cfi_ep_get_sg_val(buf, pcd, ctrl_req);
+               break;
+
+       case FT_ID_DMA_BUFF_ALIGN:
+               retval = cfi_ep_get_align_val(buf, pcd, ctrl_req);
+               break;
+
+       case FT_ID_DMA_CONCAT_SETUP:
+               retval = cfi_ep_get_concat_val(buf, pcd, ctrl_req);
+               break;
+
+       case FT_ID_DMA_CIRCULAR:
+               CFI_INFO("GetFeature value (FT_ID_DMA_CIRCULAR)\n");
+               break;
+
+       case FT_ID_THRESHOLD_SETUP:
+               CFI_INFO("GetFeature value (FT_ID_THRESHOLD_SETUP)\n");
+               break;
+
+       case FT_ID_DFIFO_DEPTH:
+               dfifo = get_dfifo_size(coreif);
+               *((uint16_t *) buf) = dfifo;
+               retval = sizeof(uint16_t);
+               break;
+
+       case FT_ID_TX_FIFO_DEPTH:
+               retval = get_txfifo_size(pcd, ctrl_req->wValue);
+               if (retval >= 0) {
+                       txfifo = retval;
+                       *((uint16_t *) buf) = txfifo;
+                       retval = sizeof(uint16_t);
+               }
+               break;
+
+       case FT_ID_RX_FIFO_DEPTH:
+               retval = get_rxfifo_size(coreif, ctrl_req->wValue);
+               if (retval >= 0) {
+                       rxfifo = retval;
+                       *((uint16_t *) buf) = rxfifo;
+                       retval = sizeof(uint16_t);
+               }
+               break;
+       }
+
+       return retval;
+}
+
+/**
+ * This function resets the SG for the specified EP to its default value
+ */
+static int cfi_reset_sg_val(cfi_ep_t * cfiep)
+{
+       dwc_memset(cfiep->bm_sg, 0, sizeof(ddma_sg_buffer_setup_t));
+       return 0;
+}
+
+/**
+ * This function resets the Alignment for the specified EP to its default value
+ */
+static int cfi_reset_align_val(cfi_ep_t * cfiep)
+{
+       dwc_memset(cfiep->bm_sg, 0, sizeof(ddma_sg_buffer_setup_t));
+       return 0;
+}
+
+/**
+ * This function resets the Concatenation for the specified EP to its default value
+ * This function will also set the value of the wTxBytes field to NULL after
+ * freeing the memory previously allocated for this field.
+ */
+static int cfi_reset_concat_val(cfi_ep_t * cfiep)
+{
+       /* First we need to free the wTxBytes field */
+       if (cfiep->bm_concat->wTxBytes) {
+               DWC_FREE(cfiep->bm_concat->wTxBytes);
+               cfiep->bm_concat->wTxBytes = NULL;
+       }
+
+       dwc_memset(cfiep->bm_concat, 0, sizeof(ddma_concat_buffer_setup_t));
+       return 0;
+}
+
+/**
+ * This function resets all the buffer setups of the specified endpoint
+ */
+static int cfi_ep_reset_all_setup_vals(cfi_ep_t * cfiep)
+{
+       cfi_reset_sg_val(cfiep);
+       cfi_reset_align_val(cfiep);
+       cfi_reset_concat_val(cfiep);
+       return 0;
+}
+
+static int cfi_handle_reset_fifo_val(struct dwc_otg_pcd *pcd, uint8_t ep_addr,
+                                    uint8_t rx_rst, uint8_t tx_rst)
+{
+       int retval = -DWC_E_INVALID;
+       uint16_t tx_siz[15];
+       uint16_t rx_siz = 0;
+       dwc_otg_pcd_ep_t *ep = NULL;
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_core_params_t *params = GET_CORE_IF(pcd)->core_params;
+
+       if (rx_rst) {
+               rx_siz = params->dev_rx_fifo_size;
+               params->dev_rx_fifo_size = GET_CORE_IF(pcd)->init_rxfsiz;
+       }
+
+       if (tx_rst) {
+               if (ep_addr == 0) {
+                       int i;
+
+                       for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+                               tx_siz[i] =
+                                   core_if->core_params->dev_tx_fifo_size[i];
+                               core_if->core_params->dev_tx_fifo_size[i] =
+                                   core_if->init_txfsiz[i];
+                       }
+               } else {
+
+                       ep = get_ep_by_addr(pcd, ep_addr);
+
+                       if (NULL == ep) {
+                               CFI_INFO
+                                   ("%s: Unable to get the endpoint addr=0x%02x\n",
+                                    __func__, ep_addr);
+                               return -DWC_E_INVALID;
+                       }
+
+                       tx_siz[0] =
+                           params->dev_tx_fifo_size[ep->dwc_ep.tx_fifo_num -
+                                                    1];
+                       params->dev_tx_fifo_size[ep->dwc_ep.tx_fifo_num - 1] =
+                           GET_CORE_IF(pcd)->init_txfsiz[ep->
+                                                         dwc_ep.tx_fifo_num -
+                                                         1];
+               }
+       }
+
+       if (resize_fifos(GET_CORE_IF(pcd))) {
+               retval = 0;
+       } else {
+               CFI_INFO
+                   ("%s: Error resetting the feature Reset All(FIFO size)\n",
+                    __func__);
+               if (rx_rst) {
+                       params->dev_rx_fifo_size = rx_siz;
+               }
+
+               if (tx_rst) {
+                       if (ep_addr == 0) {
+                               int i;
+                               for (i = 0; i < core_if->hwcfg4.b.num_in_eps;
+                                    i++) {
+                                       core_if->
+                                           core_params->dev_tx_fifo_size[i] =
+                                           tx_siz[i];
+                               }
+                       } else {
+                               params->dev_tx_fifo_size[ep->
+                                                        dwc_ep.tx_fifo_num -
+                                                        1] = tx_siz[0];
+                       }
+               }
+               retval = -DWC_E_INVALID;
+       }
+       return retval;
+}
+
+static int cfi_handle_reset_all(struct dwc_otg_pcd *pcd, uint8_t addr)
+{
+       int retval = 0;
+       cfi_ep_t *cfiep;
+       cfiobject_t *cfi = pcd->cfi;
+       dwc_list_link_t *tmp;
+
+       retval = cfi_handle_reset_fifo_val(pcd, addr, 1, 1);
+       if (retval < 0) {
+               return retval;
+       }
+
+       /* If the EP address is known then reset the features for only that EP */
+       if (addr) {
+               cfiep = get_cfi_ep_by_addr(pcd->cfi, addr);
+               if (NULL == cfiep) {
+                       CFI_INFO("%s: Error getting the EP address 0x%02x\n",
+                                __func__, addr);
+                       return -DWC_E_INVALID;
+               }
+               retval = cfi_ep_reset_all_setup_vals(cfiep);
+               cfiep->ep->dwc_ep.buff_mode = BM_STANDARD;
+       }
+       /* Otherwise (wValue == 0), reset all features of all EP's */
+       else {
+               /* Traverse all the active EP's and reset the feature(s) value(s) */
+               //list_for_each_entry(cfiep, &cfi->active_eps, lh) {
+               DWC_LIST_FOREACH(tmp, &cfi->active_eps) {
+                       cfiep = DWC_LIST_ENTRY(tmp, struct cfi_ep, lh);
+                       retval = cfi_ep_reset_all_setup_vals(cfiep);
+                       cfiep->ep->dwc_ep.buff_mode = BM_STANDARD;
+                       if (retval < 0) {
+                               CFI_INFO
+                                   ("%s: Error resetting the feature Reset All\n",
+                                    __func__);
+                               return retval;
+                       }
+               }
+       }
+       return retval;
+}
+
+static int cfi_handle_reset_dma_buff_setup(struct dwc_otg_pcd *pcd,
+                                          uint8_t addr)
+{
+       int retval = 0;
+       cfi_ep_t *cfiep;
+       cfiobject_t *cfi = pcd->cfi;
+       dwc_list_link_t *tmp;
+
+       /* If the EP address is known then reset the features for only that EP */
+       if (addr) {
+               cfiep = get_cfi_ep_by_addr(pcd->cfi, addr);
+               if (NULL == cfiep) {
+                       CFI_INFO("%s: Error getting the EP address 0x%02x\n",
+                                __func__, addr);
+                       return -DWC_E_INVALID;
+               }
+               retval = cfi_reset_sg_val(cfiep);
+       }
+       /* Otherwise (wValue == 0), reset all features of all EP's */
+       else {
+               /* Traverse all the active EP's and reset the feature(s) value(s) */
+               //list_for_each_entry(cfiep, &cfi->active_eps, lh) {
+               DWC_LIST_FOREACH(tmp, &cfi->active_eps) {
+                       cfiep = DWC_LIST_ENTRY(tmp, struct cfi_ep, lh);
+                       retval = cfi_reset_sg_val(cfiep);
+                       if (retval < 0) {
+                               CFI_INFO
+                                   ("%s: Error resetting the feature Buffer Setup\n",
+                                    __func__);
+                               return retval;
+                       }
+               }
+       }
+       return retval;
+}
+
+static int cfi_handle_reset_concat_val(struct dwc_otg_pcd *pcd, uint8_t addr)
+{
+       int retval = 0;
+       cfi_ep_t *cfiep;
+       cfiobject_t *cfi = pcd->cfi;
+       dwc_list_link_t *tmp;
+
+       /* If the EP address is known then reset the features for only that EP */
+       if (addr) {
+               cfiep = get_cfi_ep_by_addr(pcd->cfi, addr);
+               if (NULL == cfiep) {
+                       CFI_INFO("%s: Error getting the EP address 0x%02x\n",
+                                __func__, addr);
+                       return -DWC_E_INVALID;
+               }
+               retval = cfi_reset_concat_val(cfiep);
+       }
+       /* Otherwise (wValue == 0), reset all features of all EP's */
+       else {
+               /* Traverse all the active EP's and reset the feature(s) value(s) */
+               //list_for_each_entry(cfiep, &cfi->active_eps, lh) {
+               DWC_LIST_FOREACH(tmp, &cfi->active_eps) {
+                       cfiep = DWC_LIST_ENTRY(tmp, struct cfi_ep, lh);
+                       retval = cfi_reset_concat_val(cfiep);
+                       if (retval < 0) {
+                               CFI_INFO
+                                   ("%s: Error resetting the feature Concatenation Value\n",
+                                    __func__);
+                               return retval;
+                       }
+               }
+       }
+       return retval;
+}
+
+static int cfi_handle_reset_align_val(struct dwc_otg_pcd *pcd, uint8_t addr)
+{
+       int retval = 0;
+       cfi_ep_t *cfiep;
+       cfiobject_t *cfi = pcd->cfi;
+       dwc_list_link_t *tmp;
+
+       /* If the EP address is known then reset the features for only that EP */
+       if (addr) {
+               cfiep = get_cfi_ep_by_addr(pcd->cfi, addr);
+               if (NULL == cfiep) {
+                       CFI_INFO("%s: Error getting the EP address 0x%02x\n",
+                                __func__, addr);
+                       return -DWC_E_INVALID;
+               }
+               retval = cfi_reset_align_val(cfiep);
+       }
+       /* Otherwise (wValue == 0), reset all features of all EP's */
+       else {
+               /* Traverse all the active EP's and reset the feature(s) value(s) */
+               //list_for_each_entry(cfiep, &cfi->active_eps, lh) {
+               DWC_LIST_FOREACH(tmp, &cfi->active_eps) {
+                       cfiep = DWC_LIST_ENTRY(tmp, struct cfi_ep, lh);
+                       retval = cfi_reset_align_val(cfiep);
+                       if (retval < 0) {
+                               CFI_INFO
+                                   ("%s: Error resetting the feature Aliignment Value\n",
+                                    __func__);
+                               return retval;
+                       }
+               }
+       }
+       return retval;
+
+}
+
+static int cfi_preproc_reset(struct dwc_otg_pcd *pcd,
+                            struct cfi_usb_ctrlrequest *req)
+{
+       int retval = 0;
+
+       switch (req->wIndex) {
+       case 0:
+               /* Reset all features */
+               retval = cfi_handle_reset_all(pcd, req->wValue & 0xff);
+               break;
+
+       case FT_ID_DMA_BUFFER_SETUP:
+               /* Reset the SG buffer setup */
+               retval =
+                   cfi_handle_reset_dma_buff_setup(pcd, req->wValue & 0xff);
+               break;
+
+       case FT_ID_DMA_CONCAT_SETUP:
+               /* Reset the Concatenation buffer setup */
+               retval = cfi_handle_reset_concat_val(pcd, req->wValue & 0xff);
+               break;
+
+       case FT_ID_DMA_BUFF_ALIGN:
+               /* Reset the Alignment buffer setup */
+               retval = cfi_handle_reset_align_val(pcd, req->wValue & 0xff);
+               break;
+
+       case FT_ID_TX_FIFO_DEPTH:
+               retval =
+                   cfi_handle_reset_fifo_val(pcd, req->wValue & 0xff, 0, 1);
+               pcd->cfi->need_gadget_att = 0;
+               break;
+
+       case FT_ID_RX_FIFO_DEPTH:
+               retval = cfi_handle_reset_fifo_val(pcd, 0, 1, 0);
+               pcd->cfi->need_gadget_att = 0;
+               break;
+       default:
+               break;
+       }
+       return retval;
+}
+
+/**
+ * This function sets a new value for the SG buffer setup.
+ */
+static int cfi_ep_set_sg_val(uint8_t * buf, struct dwc_otg_pcd *pcd)
+{
+       uint8_t inaddr, outaddr;
+       cfi_ep_t *epin, *epout;
+       ddma_sg_buffer_setup_t *psgval;
+       uint32_t desccount, size;
+
+       CFI_INFO("%s\n", __func__);
+
+       psgval = (ddma_sg_buffer_setup_t *) buf;
+       desccount = (uint32_t) psgval->bCount;
+       size = (uint32_t) psgval->wSize;
+
+       /* Check the DMA descriptor count */
+       if ((desccount > MAX_DMA_DESCS_PER_EP) || (desccount == 0)) {
+               CFI_INFO
+                   ("%s: The count of DMA Descriptors should be between 1 and %d\n",
+                    __func__, MAX_DMA_DESCS_PER_EP);
+               return -DWC_E_INVALID;
+       }
+
+       /* Check the DMA descriptor count */
+
+       if (size == 0) {
+
+               CFI_INFO("%s: The transfer size should be at least 1 byte\n",
+                        __func__);
+
+               return -DWC_E_INVALID;
+
+       }
+
+       inaddr = psgval->bInEndpointAddress;
+       outaddr = psgval->bOutEndpointAddress;
+
+       epin = get_cfi_ep_by_addr(pcd->cfi, inaddr);
+       epout = get_cfi_ep_by_addr(pcd->cfi, outaddr);
+
+       if (NULL == epin || NULL == epout) {
+               CFI_INFO
+                   ("%s: Unable to get the endpoints inaddr=0x%02x outaddr=0x%02x\n",
+                    __func__, inaddr, outaddr);
+               return -DWC_E_INVALID;
+       }
+
+       epin->ep->dwc_ep.buff_mode = BM_SG;
+       dwc_memcpy(epin->bm_sg, psgval, sizeof(ddma_sg_buffer_setup_t));
+
+       epout->ep->dwc_ep.buff_mode = BM_SG;
+       dwc_memcpy(epout->bm_sg, psgval, sizeof(ddma_sg_buffer_setup_t));
+
+       return 0;
+}
+
+/**
+ * This function sets a new value for the buffer Alignment setup.
+ */
+static int cfi_ep_set_alignment_val(uint8_t * buf, struct dwc_otg_pcd *pcd)
+{
+       cfi_ep_t *ep;
+       uint8_t addr;
+       ddma_align_buffer_setup_t *palignval;
+
+       palignval = (ddma_align_buffer_setup_t *) buf;
+       addr = palignval->bEndpointAddress;
+
+       ep = get_cfi_ep_by_addr(pcd->cfi, addr);
+
+       if (NULL == ep) {
+               CFI_INFO("%s: Unable to get the endpoint addr=0x%02x\n",
+                        __func__, addr);
+               return -DWC_E_INVALID;
+       }
+
+       ep->ep->dwc_ep.buff_mode = BM_ALIGN;
+       dwc_memcpy(ep->bm_align, palignval, sizeof(ddma_align_buffer_setup_t));
+
+       return 0;
+}
+
+/**
+ * This function sets a new value for the Concatenation buffer setup.
+ */
+static int cfi_ep_set_concat_val(uint8_t * buf, struct dwc_otg_pcd *pcd)
+{
+       uint8_t addr;
+       cfi_ep_t *ep;
+       struct _ddma_concat_buffer_setup_hdr *pConcatValHdr;
+       uint16_t *pVals;
+       uint32_t desccount;
+       int i;
+       uint16_t mps;
+
+       pConcatValHdr = (struct _ddma_concat_buffer_setup_hdr *)buf;
+       desccount = (uint32_t) pConcatValHdr->bDescCount;
+       pVals = (uint16_t *) (buf + BS_CONCAT_VAL_HDR_LEN);
+
+       /* Check the DMA descriptor count */
+       if (desccount > MAX_DMA_DESCS_PER_EP) {
+               CFI_INFO("%s: Maximum DMA Descriptor count should be %d\n",
+                        __func__, MAX_DMA_DESCS_PER_EP);
+               return -DWC_E_INVALID;
+       }
+
+       addr = pConcatValHdr->bEndpointAddress;
+       ep = get_cfi_ep_by_addr(pcd->cfi, addr);
+       if (NULL == ep) {
+               CFI_INFO("%s: Unable to get the endpoint addr=0x%02x\n",
+                        __func__, addr);
+               return -DWC_E_INVALID;
+       }
+
+       mps = UGETW(ep->ep->desc->wMaxPacketSize);
+
+#if 0
+       for (i = 0; i < desccount; i++) {
+               CFI_INFO("%s: wTxSize[%d]=0x%04x\n", __func__, i, pVals[i]);
+       }
+       CFI_INFO("%s: epname=%s; mps=%d\n", __func__, ep->ep->ep.name, mps);
+#endif
+
+       /* Check the wTxSizes to be less than or equal to the mps */
+       for (i = 0; i < desccount; i++) {
+               if (pVals[i] > mps) {
+                       CFI_INFO
+                           ("%s: ERROR - the wTxSize[%d] should be <= MPS (wTxSize=%d)\n",
+                            __func__, i, pVals[i]);
+                       return -DWC_E_INVALID;
+               }
+       }
+
+       ep->ep->dwc_ep.buff_mode = BM_CONCAT;
+       dwc_memcpy(ep->bm_concat, pConcatValHdr, BS_CONCAT_VAL_HDR_LEN);
+
+       /* Free the previously allocated storage for the wTxBytes */
+       if (ep->bm_concat->wTxBytes) {
+               DWC_FREE(ep->bm_concat->wTxBytes);
+       }
+
+       /* Allocate a new storage for the wTxBytes field */
+       ep->bm_concat->wTxBytes =
+           DWC_ALLOC(sizeof(uint16_t) * pConcatValHdr->bDescCount);
+       if (NULL == ep->bm_concat->wTxBytes) {
+               CFI_INFO("%s: Unable to allocate memory\n", __func__);
+               return -DWC_E_NO_MEMORY;
+       }
+
+       /* Copy the new values into the wTxBytes filed */
+       dwc_memcpy(ep->bm_concat->wTxBytes, buf + BS_CONCAT_VAL_HDR_LEN,
+                  sizeof(uint16_t) * pConcatValHdr->bDescCount);
+
+       return 0;
+}
+
+/**
+ * This function calculates the total of all FIFO sizes
+ *
+ * @param core_if Programming view of DWC_otg controller
+ *
+ * @return The total of data FIFO sizes.
+ *
+ */
+static uint16_t get_dfifo_size(dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_core_params_t *params = core_if->core_params;
+       uint16_t dfifo_total = 0;
+       int i;
+
+       /* The shared RxFIFO size */
+       dfifo_total =
+           params->dev_rx_fifo_size + params->dev_nperio_tx_fifo_size;
+
+       /* Add up each TxFIFO size to the total */
+       for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+               dfifo_total += params->dev_tx_fifo_size[i];
+       }
+
+       return dfifo_total;
+}
+
+/**
+ * This function returns Rx FIFO size
+ *
+ * @param core_if Programming view of DWC_otg controller
+ *
+ * @return The total of data FIFO sizes.
+ *
+ */
+static int32_t get_rxfifo_size(dwc_otg_core_if_t * core_if, uint16_t wValue)
+{
+       switch (wValue >> 8) {
+       case 0:
+               return (core_if->pwron_rxfsiz <
+                       32768) ? core_if->pwron_rxfsiz : 32768;
+               break;
+       case 1:
+               return core_if->core_params->dev_rx_fifo_size;
+               break;
+       default:
+               return -DWC_E_INVALID;
+               break;
+       }
+}
+
+/**
+ * This function returns Tx FIFO size for IN EP
+ *
+ * @param core_if Programming view of DWC_otg controller
+ *
+ * @return The total of data FIFO sizes.
+ *
+ */
+static int32_t get_txfifo_size(struct dwc_otg_pcd *pcd, uint16_t wValue)
+{
+       dwc_otg_pcd_ep_t *ep;
+
+       ep = get_ep_by_addr(pcd, wValue & 0xff);
+
+       if (NULL == ep) {
+               CFI_INFO("%s: Unable to get the endpoint addr=0x%02x\n",
+                        __func__, wValue & 0xff);
+               return -DWC_E_INVALID;
+       }
+
+       if (!ep->dwc_ep.is_in) {
+               CFI_INFO
+                   ("%s: No Tx FIFO assingned to the Out endpoint addr=0x%02x\n",
+                    __func__, wValue & 0xff);
+               return -DWC_E_INVALID;
+       }
+
+       switch (wValue >> 8) {
+       case 0:
+               return (GET_CORE_IF(pcd)->pwron_txfsiz
+                       [ep->dwc_ep.tx_fifo_num - 1] <
+                       768) ? GET_CORE_IF(pcd)->pwron_txfsiz[ep->
+                                                             dwc_ep.tx_fifo_num
+                                                             - 1] : 32768;
+               break;
+       case 1:
+               return GET_CORE_IF(pcd)->core_params->
+                   dev_tx_fifo_size[ep->dwc_ep.num - 1];
+               break;
+       default:
+               return -DWC_E_INVALID;
+               break;
+       }
+}
+
+/**
+ * This function checks if the submitted combination of
+ * device mode FIFO sizes is possible or not.
+ *
+ * @param core_if Programming view of DWC_otg controller
+ *
+ * @return 1 if possible, 0 otherwise.
+ *
+ */
+static uint8_t check_fifo_sizes(dwc_otg_core_if_t * core_if)
+{
+       uint16_t dfifo_actual = 0;
+       dwc_otg_core_params_t *params = core_if->core_params;
+       uint16_t start_addr = 0;
+       int i;
+
+       dfifo_actual =
+           params->dev_rx_fifo_size + params->dev_nperio_tx_fifo_size;
+
+       for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+               dfifo_actual += params->dev_tx_fifo_size[i];
+       }
+
+       if (dfifo_actual > core_if->total_fifo_size) {
+               return 0;
+       }
+
+       if (params->dev_rx_fifo_size > 32768 || params->dev_rx_fifo_size < 16)
+               return 0;
+
+       if (params->dev_nperio_tx_fifo_size > 32768
+           || params->dev_nperio_tx_fifo_size < 16)
+               return 0;
+
+       for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+
+               if (params->dev_tx_fifo_size[i] > 768
+                   || params->dev_tx_fifo_size[i] < 4)
+                       return 0;
+       }
+
+       if (params->dev_rx_fifo_size > core_if->pwron_rxfsiz)
+               return 0;
+       start_addr = params->dev_rx_fifo_size;
+
+       if (params->dev_nperio_tx_fifo_size > core_if->pwron_gnptxfsiz)
+               return 0;
+       start_addr += params->dev_nperio_tx_fifo_size;
+
+       for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+
+               if (params->dev_tx_fifo_size[i] > core_if->pwron_txfsiz[i])
+                       return 0;
+               start_addr += params->dev_tx_fifo_size[i];
+       }
+
+       return 1;
+}
+
+/**
+ * This function resizes Device mode FIFOs
+ *
+ * @param core_if Programming view of DWC_otg controller
+ *
+ * @return 1 if successful, 0 otherwise
+ *
+ */
+static uint8_t resize_fifos(dwc_otg_core_if_t * core_if)
+{
+       int i = 0;
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       dwc_otg_core_params_t *params = core_if->core_params;
+       uint32_t rx_fifo_size;
+       fifosize_data_t nptxfifosize;
+       fifosize_data_t txfifosize[15];
+
+       uint32_t rx_fsz_bak;
+       uint32_t nptxfsz_bak;
+       uint32_t txfsz_bak[15];
+
+       uint16_t start_address;
+       uint8_t retval = 1;
+
+       if (!check_fifo_sizes(core_if)) {
+               return 0;
+       }
+
+       /* Configure data FIFO sizes */
+       if (core_if->hwcfg2.b.dynamic_fifo && params->enable_dynamic_fifo) {
+               rx_fsz_bak = DWC_READ_REG32(&global_regs->grxfsiz);
+               rx_fifo_size = params->dev_rx_fifo_size;
+               DWC_WRITE_REG32(&global_regs->grxfsiz, rx_fifo_size);
+
+               /*
+                * Tx FIFOs These FIFOs are numbered from 1 to 15.
+                * Indexes of the FIFO size module parameters in the
+                * dev_tx_fifo_size array and the FIFO size registers in
+                * the dtxfsiz array run from 0 to 14.
+                */
+
+               /* Non-periodic Tx FIFO */
+               nptxfsz_bak = DWC_READ_REG32(&global_regs->gnptxfsiz);
+               nptxfifosize.b.depth = params->dev_nperio_tx_fifo_size;
+               start_address = params->dev_rx_fifo_size;
+               nptxfifosize.b.startaddr = start_address;
+
+               DWC_WRITE_REG32(&global_regs->gnptxfsiz, nptxfifosize.d32);
+
+               start_address += nptxfifosize.b.depth;
+
+               for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+                       txfsz_bak[i] = DWC_READ_REG32(&global_regs->dtxfsiz[i]);
+
+                       txfifosize[i].b.depth = params->dev_tx_fifo_size[i];
+                       txfifosize[i].b.startaddr = start_address;
+                       DWC_WRITE_REG32(&global_regs->dtxfsiz[i],
+                                       txfifosize[i].d32);
+
+                       start_address += txfifosize[i].b.depth;
+               }
+
+               /** Check if register values are set correctly */
+               if (rx_fifo_size != DWC_READ_REG32(&global_regs->grxfsiz)) {
+                       retval = 0;
+               }
+
+               if (nptxfifosize.d32 != DWC_READ_REG32(&global_regs->gnptxfsiz)) {
+                       retval = 0;
+               }
+
+               for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+                       if (txfifosize[i].d32 !=
+                           DWC_READ_REG32(&global_regs->dtxfsiz[i])) {
+                               retval = 0;
+                       }
+               }
+
+               /** If register values are not set correctly, reset old values */
+               if (retval == 0) {
+                       DWC_WRITE_REG32(&global_regs->grxfsiz, rx_fsz_bak);
+
+                       /* Non-periodic Tx FIFO */
+                       DWC_WRITE_REG32(&global_regs->gnptxfsiz, nptxfsz_bak);
+
+                       for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+                               DWC_WRITE_REG32(&global_regs->dtxfsiz[i],
+                                               txfsz_bak[i]);
+                       }
+               }
+       } else {
+               return 0;
+       }
+
+       /* Flush the FIFOs */
+       dwc_otg_flush_tx_fifo(core_if, 0x10);   /* all Tx FIFOs */
+       dwc_otg_flush_rx_fifo(core_if);
+
+       return retval;
+}
+
+/**
+ * This function sets a new value for the buffer Alignment setup.
+ */
+static int cfi_ep_set_tx_fifo_val(uint8_t * buf, dwc_otg_pcd_t * pcd)
+{
+       int retval;
+       uint32_t fsiz;
+       uint16_t size;
+       uint16_t ep_addr;
+       dwc_otg_pcd_ep_t *ep;
+       dwc_otg_core_params_t *params = GET_CORE_IF(pcd)->core_params;
+       tx_fifo_size_setup_t *ptxfifoval;
+
+       ptxfifoval = (tx_fifo_size_setup_t *) buf;
+       ep_addr = ptxfifoval->bEndpointAddress;
+       size = ptxfifoval->wDepth;
+
+       ep = get_ep_by_addr(pcd, ep_addr);
+
+       CFI_INFO
+           ("%s: Set Tx FIFO size: endpoint addr=0x%02x, depth=%d, FIFO Num=%d\n",
+            __func__, ep_addr, size, ep->dwc_ep.tx_fifo_num);
+
+       if (NULL == ep) {
+               CFI_INFO("%s: Unable to get the endpoint addr=0x%02x\n",
+                        __func__, ep_addr);
+               return -DWC_E_INVALID;
+       }
+
+       fsiz = params->dev_tx_fifo_size[ep->dwc_ep.tx_fifo_num - 1];
+       params->dev_tx_fifo_size[ep->dwc_ep.tx_fifo_num - 1] = size;
+
+       if (resize_fifos(GET_CORE_IF(pcd))) {
+               retval = 0;
+       } else {
+               CFI_INFO
+                   ("%s: Error setting the feature Tx FIFO Size for EP%d\n",
+                    __func__, ep_addr);
+               params->dev_tx_fifo_size[ep->dwc_ep.tx_fifo_num - 1] = fsiz;
+               retval = -DWC_E_INVALID;
+       }
+
+       return retval;
+}
+
+/**
+ * This function sets a new value for the buffer Alignment setup.
+ */
+static int cfi_set_rx_fifo_val(uint8_t * buf, dwc_otg_pcd_t * pcd)
+{
+       int retval;
+       uint32_t fsiz;
+       uint16_t size;
+       dwc_otg_core_params_t *params = GET_CORE_IF(pcd)->core_params;
+       rx_fifo_size_setup_t *prxfifoval;
+
+       prxfifoval = (rx_fifo_size_setup_t *) buf;
+       size = prxfifoval->wDepth;
+
+       fsiz = params->dev_rx_fifo_size;
+       params->dev_rx_fifo_size = size;
+
+       if (resize_fifos(GET_CORE_IF(pcd))) {
+               retval = 0;
+       } else {
+               CFI_INFO("%s: Error setting the feature Rx FIFO Size\n",
+                        __func__);
+               params->dev_rx_fifo_size = fsiz;
+               retval = -DWC_E_INVALID;
+       }
+
+       return retval;
+}
+
+/**
+ * This function reads the SG of an EP's buffer setup into the buffer buf
+ */
+static int cfi_ep_get_sg_val(uint8_t * buf, struct dwc_otg_pcd *pcd,
+                            struct cfi_usb_ctrlrequest *req)
+{
+       int retval = -DWC_E_INVALID;
+       uint8_t addr;
+       cfi_ep_t *ep;
+
+       /* The Low Byte of the wValue contains a non-zero address of the endpoint */
+       addr = req->wValue & 0xFF;
+       if (addr == 0)          /* The address should be non-zero */
+               return retval;
+
+       ep = get_cfi_ep_by_addr(pcd->cfi, addr);
+       if (NULL == ep) {
+               CFI_INFO("%s: Unable to get the endpoint address(0x%02x)\n",
+                        __func__, addr);
+               return retval;
+       }
+
+       dwc_memcpy(buf, ep->bm_sg, BS_SG_VAL_DESC_LEN);
+       retval = BS_SG_VAL_DESC_LEN;
+       return retval;
+}
+
+/**
+ * This function reads the Concatenation value of an EP's buffer mode into
+ * the buffer buf
+ */
+static int cfi_ep_get_concat_val(uint8_t * buf, struct dwc_otg_pcd *pcd,
+                                struct cfi_usb_ctrlrequest *req)
+{
+       int retval = -DWC_E_INVALID;
+       uint8_t addr;
+       cfi_ep_t *ep;
+       uint8_t desc_count;
+
+       /* The Low Byte of the wValue contains a non-zero address of the endpoint */
+       addr = req->wValue & 0xFF;
+       if (addr == 0)          /* The address should be non-zero */
+               return retval;
+
+       ep = get_cfi_ep_by_addr(pcd->cfi, addr);
+       if (NULL == ep) {
+               CFI_INFO("%s: Unable to get the endpoint address(0x%02x)\n",
+                        __func__, addr);
+               return retval;
+       }
+
+       /* Copy the header to the buffer */
+       dwc_memcpy(buf, ep->bm_concat, BS_CONCAT_VAL_HDR_LEN);
+       /* Advance the buffer pointer by the header size */
+       buf += BS_CONCAT_VAL_HDR_LEN;
+
+       desc_count = ep->bm_concat->hdr.bDescCount;
+       /* Copy alll the wTxBytes to the buffer */
+       dwc_memcpy(buf, ep->bm_concat->wTxBytes, sizeof(uid16_t) * desc_count);
+
+       retval = BS_CONCAT_VAL_HDR_LEN + sizeof(uid16_t) * desc_count;
+       return retval;
+}
+
+/**
+ * This function reads the buffer Alignment value of an EP's buffer mode into
+ * the buffer buf
+ *
+ * @return The total number of bytes copied to the buffer or negative error code.
+ */
+static int cfi_ep_get_align_val(uint8_t * buf, struct dwc_otg_pcd *pcd,
+                               struct cfi_usb_ctrlrequest *req)
+{
+       int retval = -DWC_E_INVALID;
+       uint8_t addr;
+       cfi_ep_t *ep;
+
+       /* The Low Byte of the wValue contains a non-zero address of the endpoint */
+       addr = req->wValue & 0xFF;
+       if (addr == 0)          /* The address should be non-zero */
+               return retval;
+
+       ep = get_cfi_ep_by_addr(pcd->cfi, addr);
+       if (NULL == ep) {
+               CFI_INFO("%s: Unable to get the endpoint address(0x%02x)\n",
+                        __func__, addr);
+               return retval;
+       }
+
+       dwc_memcpy(buf, ep->bm_align, BS_ALIGN_VAL_HDR_LEN);
+       retval = BS_ALIGN_VAL_HDR_LEN;
+
+       return retval;
+}
+
+/**
+ * This function sets a new value for the specified feature
+ *
+ * @param      pcd     A pointer to the PCD object
+ *
+ * @return 0 if successful, negative error code otherwise to stall the DCE.
+ */
+static int cfi_set_feature_value(struct dwc_otg_pcd *pcd)
+{
+       int retval = -DWC_E_NOT_SUPPORTED;
+       uint16_t wIndex, wValue;
+       uint8_t bRequest;
+       struct dwc_otg_core_if *coreif;
+       cfiobject_t *cfi = pcd->cfi;
+       struct cfi_usb_ctrlrequest *ctrl_req;
+       uint8_t *buf;
+       ctrl_req = &cfi->ctrl_req;
+
+       buf = pcd->cfi->ctrl_req.data;
+
+       coreif = GET_CORE_IF(pcd);
+       bRequest = ctrl_req->bRequest;
+       wIndex = DWC_CONSTANT_CPU_TO_LE16(ctrl_req->wIndex);
+       wValue = DWC_CONSTANT_CPU_TO_LE16(ctrl_req->wValue);
+
+       /* See which feature is to be modified */
+       switch (wIndex) {
+       case FT_ID_DMA_BUFFER_SETUP:
+               /* Modify the feature */
+               if ((retval = cfi_ep_set_sg_val(buf, pcd)) < 0)
+                       return retval;
+
+               /* And send this request to the gadget */
+               cfi->need_gadget_att = 1;
+               break;
+
+       case FT_ID_DMA_BUFF_ALIGN:
+               if ((retval = cfi_ep_set_alignment_val(buf, pcd)) < 0)
+                       return retval;
+               cfi->need_gadget_att = 1;
+               break;
+
+       case FT_ID_DMA_CONCAT_SETUP:
+               /* Modify the feature */
+               if ((retval = cfi_ep_set_concat_val(buf, pcd)) < 0)
+                       return retval;
+               cfi->need_gadget_att = 1;
+               break;
+
+       case FT_ID_DMA_CIRCULAR:
+               CFI_INFO("FT_ID_DMA_CIRCULAR\n");
+               break;
+
+       case FT_ID_THRESHOLD_SETUP:
+               CFI_INFO("FT_ID_THRESHOLD_SETUP\n");
+               break;
+
+       case FT_ID_DFIFO_DEPTH:
+               CFI_INFO("FT_ID_DFIFO_DEPTH\n");
+               break;
+
+       case FT_ID_TX_FIFO_DEPTH:
+               CFI_INFO("FT_ID_TX_FIFO_DEPTH\n");
+               if ((retval = cfi_ep_set_tx_fifo_val(buf, pcd)) < 0)
+                       return retval;
+               cfi->need_gadget_att = 0;
+               break;
+
+       case FT_ID_RX_FIFO_DEPTH:
+               CFI_INFO("FT_ID_RX_FIFO_DEPTH\n");
+               if ((retval = cfi_set_rx_fifo_val(buf, pcd)) < 0)
+                       return retval;
+               cfi->need_gadget_att = 0;
+               break;
+       }
+
+       return retval;
+}
+
+#endif //DWC_UTE_CFI
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_cfi.h
@@ -0,0 +1,320 @@
+/* ==========================================================================
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+#if !defined(__DWC_OTG_CFI_H__)
+#define __DWC_OTG_CFI_H__
+
+#include "dwc_otg_pcd.h"
+#include "dwc_cfi_common.h"
+
+/**
+ * @file
+ * This file contains the CFI related OTG PCD specific common constants,
+ * interfaces(functions and macros) and data structures.The CFI Protocol is an
+ * optional interface for internal testing purposes that a DUT may implement to
+ * support testing of configurable features.
+ *
+ */
+
+struct dwc_otg_pcd;
+struct dwc_otg_pcd_ep;
+
+/** OTG CFI Features (properties) ID constants */
+/** This is a request for all Core Features */
+#define FT_ID_DMA_MODE                                 0x0001
+#define FT_ID_DMA_BUFFER_SETUP                 0x0002
+#define FT_ID_DMA_BUFF_ALIGN                   0x0003
+#define FT_ID_DMA_CONCAT_SETUP                 0x0004
+#define FT_ID_DMA_CIRCULAR                             0x0005
+#define FT_ID_THRESHOLD_SETUP                  0x0006
+#define FT_ID_DFIFO_DEPTH                              0x0007
+#define FT_ID_TX_FIFO_DEPTH                            0x0008
+#define FT_ID_RX_FIFO_DEPTH                            0x0009
+
+/**********************************************************/
+#define CFI_INFO_DEF
+
+#ifdef CFI_INFO_DEF
+#define CFI_INFO(fmt...)       DWC_PRINTF("CFI: " fmt);
+#else
+#define CFI_INFO(fmt...)
+#endif
+
+#define min(x,y) ({ \
+       x < y ? x : y; })
+
+#define max(x,y) ({ \
+       x > y ? x : y; })
+
+/**
+ * Descriptor DMA SG Buffer setup structure (SG buffer). This structure is
+ * also used for setting up a buffer for Circular DDMA.
+ */
+struct _ddma_sg_buffer_setup {
+#define BS_SG_VAL_DESC_LEN     6
+       /* The OUT EP address */
+       uint8_t bOutEndpointAddress;
+       /* The IN EP address */
+       uint8_t bInEndpointAddress;
+       /* Number of bytes to put between transfer segments (must be DWORD boundaries) */
+       uint8_t bOffset;
+       /* The number of transfer segments (a DMA descriptors per each segment) */
+       uint8_t bCount;
+       /* Size (in byte) of each transfer segment */
+       uint16_t wSize;
+} __attribute__ ((packed));
+typedef struct _ddma_sg_buffer_setup ddma_sg_buffer_setup_t;
+
+/** Descriptor DMA Concatenation Buffer setup structure */
+struct _ddma_concat_buffer_setup_hdr {
+#define BS_CONCAT_VAL_HDR_LEN  4
+       /* The endpoint for which the buffer is to be set up */
+       uint8_t bEndpointAddress;
+       /* The count of descriptors to be used */
+       uint8_t bDescCount;
+       /* The total size of the transfer */
+       uint16_t wSize;
+} __attribute__ ((packed));
+typedef struct _ddma_concat_buffer_setup_hdr ddma_concat_buffer_setup_hdr_t;
+
+/** Descriptor DMA Concatenation Buffer setup structure */
+struct _ddma_concat_buffer_setup {
+       /* The SG header */
+       ddma_concat_buffer_setup_hdr_t hdr;
+
+       /* The XFER sizes pointer (allocated dynamically) */
+       uint16_t *wTxBytes;
+} __attribute__ ((packed));
+typedef struct _ddma_concat_buffer_setup ddma_concat_buffer_setup_t;
+
+/** Descriptor DMA Alignment Buffer setup structure */
+struct _ddma_align_buffer_setup {
+#define BS_ALIGN_VAL_HDR_LEN   2
+       uint8_t bEndpointAddress;
+       uint8_t bAlign;
+} __attribute__ ((packed));
+typedef struct _ddma_align_buffer_setup ddma_align_buffer_setup_t;
+
+/** Transmit FIFO Size setup structure */
+struct _tx_fifo_size_setup {
+       uint8_t bEndpointAddress;
+       uint16_t wDepth;
+} __attribute__ ((packed));
+typedef struct _tx_fifo_size_setup tx_fifo_size_setup_t;
+
+/** Transmit FIFO Size setup structure */
+struct _rx_fifo_size_setup {
+       uint16_t wDepth;
+} __attribute__ ((packed));
+typedef struct _rx_fifo_size_setup rx_fifo_size_setup_t;
+
+/**
+ * struct cfi_usb_ctrlrequest - the CFI implementation of the struct usb_ctrlrequest
+ * This structure encapsulates the standard usb_ctrlrequest and adds a pointer
+ * to the data returned in the data stage of a 3-stage Control Write requests.
+ */
+struct cfi_usb_ctrlrequest {
+       uint8_t bRequestType;
+       uint8_t bRequest;
+       uint16_t wValue;
+       uint16_t wIndex;
+       uint16_t wLength;
+       uint8_t *data;
+} UPACKED;
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ * The CFI wrapper of the enabled and activated dwc_otg_pcd_ep structures.
+ * This structure is used to store the buffer setup data for any
+ * enabled endpoint in the PCD.
+ */
+struct cfi_ep {
+       /* Entry for the list container */
+       dwc_list_link_t lh;
+       /* Pointer to the active PCD endpoint structure */
+       struct dwc_otg_pcd_ep *ep;
+       /* The last descriptor in the chain of DMA descriptors of the endpoint */
+       struct dwc_otg_dma_desc *dma_desc_last;
+       /* The SG feature value */
+       ddma_sg_buffer_setup_t *bm_sg;
+       /* The Circular feature value */
+       ddma_sg_buffer_setup_t *bm_circ;
+       /* The Concatenation feature value */
+       ddma_concat_buffer_setup_t *bm_concat;
+       /* The Alignment feature value */
+       ddma_align_buffer_setup_t *bm_align;
+       /* XFER length */
+       uint32_t xfer_len;
+       /*
+        * Count of DMA descriptors currently used.
+        * The total should not exceed the MAX_DMA_DESCS_PER_EP value
+        * defined in the dwc_otg_cil.h
+        */
+       uint32_t desc_count;
+};
+typedef struct cfi_ep cfi_ep_t;
+
+typedef struct cfi_dma_buff {
+#define CFI_IN_BUF_LEN 1024
+#define CFI_OUT_BUF_LEN        1024
+       dma_addr_t addr;
+       uint8_t *buf;
+} cfi_dma_buff_t;
+
+struct cfiobject;
+
+/**
+ * This is the interface for the CFI operations.
+ *
+ * @param      ep_enable                       Called when any endpoint is enabled and activated.
+ * @param      release                         Called when the CFI object is released and it needs to correctly
+ *                                                             deallocate the dynamic memory
+ * @param      ctrl_write_complete     Called when the data stage of the request is complete
+ */
+typedef struct cfi_ops {
+       int (*ep_enable) (struct cfiobject * cfi, struct dwc_otg_pcd * pcd,
+                         struct dwc_otg_pcd_ep * ep);
+       void *(*ep_alloc_buf) (struct cfiobject * cfi, struct dwc_otg_pcd * pcd,
+                              struct dwc_otg_pcd_ep * ep, dma_addr_t * dma,
+                              unsigned size, gfp_t flags);
+       void (*release) (struct cfiobject * cfi);
+       int (*ctrl_write_complete) (struct cfiobject * cfi,
+                                   struct dwc_otg_pcd * pcd);
+       void (*build_descriptors) (struct cfiobject * cfi,
+                                  struct dwc_otg_pcd * pcd,
+                                  struct dwc_otg_pcd_ep * ep,
+                                  dwc_otg_pcd_request_t * req);
+} cfi_ops_t;
+
+struct cfiobject {
+       cfi_ops_t ops;
+       struct dwc_otg_pcd *pcd;
+       struct usb_gadget *gadget;
+
+       /* Buffers used to send/receive CFI-related request data */
+       cfi_dma_buff_t buf_in;
+       cfi_dma_buff_t buf_out;
+
+       /* CFI specific Control request wrapper */
+       struct cfi_usb_ctrlrequest ctrl_req;
+
+       /* The list of active EP's in the PCD of type cfi_ep_t */
+       dwc_list_link_t active_eps;
+
+       /* This flag shall control the propagation of a specific request
+        * to the gadget's processing routines.
+        * 0 - no gadget handling
+        * 1 - the gadget needs to know about this request (w/o completing a status
+        * phase - just return a 0 to the _setup callback)
+        */
+       uint8_t need_gadget_att;
+
+       /* Flag indicating whether the status IN phase needs to be
+        * completed by the PCD
+        */
+       uint8_t need_status_in_complete;
+};
+typedef struct cfiobject cfiobject_t;
+
+#define DUMP_MSG
+
+#if defined(DUMP_MSG)
+static inline void dump_msg(const u8 * buf, unsigned int length)
+{
+       unsigned int start, num, i;
+       char line[52], *p;
+
+       if (length >= 512)
+               return;
+
+       start = 0;
+       while (length > 0) {
+               num = min(length, 16u);
+               p = line;
+               for (i = 0; i < num; ++i) {
+                       if (i == 8)
+                               *p++ = ' ';
+                       DWC_SPRINTF(p, " %02x", buf[i]);
+                       p += 3;
+               }
+               *p = 0;
+               DWC_DEBUG("%6x: %s\n", start, line);
+               buf += num;
+               start += num;
+               length -= num;
+       }
+}
+#else
+static inline void dump_msg(const u8 * buf, unsigned int length)
+{
+}
+#endif
+
+/**
+ * This function returns a pointer to cfi_ep_t object with the addr address.
+ */
+static inline struct cfi_ep *get_cfi_ep_by_addr(struct cfiobject *cfi,
+                                               uint8_t addr)
+{
+       struct cfi_ep *pcfiep;
+       dwc_list_link_t *tmp;
+
+       DWC_LIST_FOREACH(tmp, &cfi->active_eps) {
+               pcfiep = DWC_LIST_ENTRY(tmp, struct cfi_ep, lh);
+
+               if (pcfiep->ep->desc->bEndpointAddress == addr) {
+                       return pcfiep;
+               }
+       }
+
+       return NULL;
+}
+
+/**
+ * This function returns a pointer to cfi_ep_t object that matches
+ * the dwc_otg_pcd_ep object.
+ */
+static inline struct cfi_ep *get_cfi_ep_by_pcd_ep(struct cfiobject *cfi,
+                                                 struct dwc_otg_pcd_ep *ep)
+{
+       struct cfi_ep *pcfiep = NULL;
+       dwc_list_link_t *tmp;
+
+       DWC_LIST_FOREACH(tmp, &cfi->active_eps) {
+               pcfiep = DWC_LIST_ENTRY(tmp, struct cfi_ep, lh);
+               if (pcfiep->ep == ep) {
+                       return pcfiep;
+               }
+       }
+       return NULL;
+}
+
+int cfi_setup(struct dwc_otg_pcd *pcd, struct cfi_usb_ctrlrequest *ctrl);
+
+#endif /* (__DWC_OTG_CFI_H__) */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_cil.c
@@ -0,0 +1,7146 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_cil.c $
+ * $Revision: #191 $
+ * $Date: 2012/08/10 $
+ * $Change: 2047372 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+/** @file
+ *
+ * The Core Interface Layer provides basic services for accessing and
+ * managing the DWC_otg hardware. These services are used by both the
+ * Host Controller Driver and the Peripheral Controller Driver.
+ *
+ * The CIL manages the memory map for the core so that the HCD and PCD
+ * don't have to do this separately. It also handles basic tasks like
+ * reading/writing the registers and data FIFOs in the controller.
+ * Some of the data access functions provide encapsulation of several
+ * operations required to perform a task, such as writing multiple
+ * registers to start a transfer. Finally, the CIL performs basic
+ * services that are not specific to either the host or device modes
+ * of operation. These services include management of the OTG Host
+ * Negotiation Protocol (HNP) and Session Request Protocol (SRP). A
+ * Diagnostic API is also provided to allow testing of the controller
+ * hardware.
+ *
+ * The Core Interface Layer has the following requirements:
+ * - Provides basic controller operations.
+ * - Minimal use of OS services.
+ * - The OS services used will be abstracted by using inline functions
+ *      or macros.
+ *
+ */
+
+#include "dwc_os.h"
+#include "dwc_otg_regs.h"
+#include "dwc_otg_cil.h"
+
+extern bool cil_force_host;
+
+static int dwc_otg_setup_params(dwc_otg_core_if_t * core_if);
+
+/**
+ * This function is called to initialize the DWC_otg CSR data
+ * structures. The register addresses in the device and host
+ * structures are initialized from the base address supplied by the
+ * caller. The calling function must make the OS calls to get the
+ * base address of the DWC_otg controller registers. The core_params
+ * argument holds the parameters that specify how the core should be
+ * configured.
+ *
+ * @param reg_base_addr Base address of DWC_otg core registers
+ *
+ */
+dwc_otg_core_if_t *dwc_otg_cil_init(const uint32_t * reg_base_addr)
+{
+       dwc_otg_core_if_t *core_if = 0;
+       dwc_otg_dev_if_t *dev_if = 0;
+       dwc_otg_host_if_t *host_if = 0;
+       uint8_t *reg_base = (uint8_t *) reg_base_addr;
+       int i = 0;
+
+       DWC_DEBUGPL(DBG_CILV, "%s(%p)\n", __func__, reg_base_addr);
+
+       core_if = DWC_ALLOC(sizeof(dwc_otg_core_if_t));
+
+       if (core_if == NULL) {
+               DWC_DEBUGPL(DBG_CIL,
+                           "Allocation of dwc_otg_core_if_t failed\n");
+               return 0;
+       }
+       core_if->core_global_regs = (dwc_otg_core_global_regs_t *) reg_base;
+
+       /*
+        * Allocate the Device Mode structures.
+        */
+       dev_if = DWC_ALLOC(sizeof(dwc_otg_dev_if_t));
+
+       if (dev_if == NULL) {
+               DWC_DEBUGPL(DBG_CIL, "Allocation of dwc_otg_dev_if_t failed\n");
+               DWC_FREE(core_if);
+               return 0;
+       }
+
+       dev_if->dev_global_regs =
+           (dwc_otg_device_global_regs_t *) (reg_base +
+                                             DWC_DEV_GLOBAL_REG_OFFSET);
+
+       for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+               dev_if->in_ep_regs[i] = (dwc_otg_dev_in_ep_regs_t *)
+                   (reg_base + DWC_DEV_IN_EP_REG_OFFSET +
+                    (i * DWC_EP_REG_OFFSET));
+
+               dev_if->out_ep_regs[i] = (dwc_otg_dev_out_ep_regs_t *)
+                   (reg_base + DWC_DEV_OUT_EP_REG_OFFSET +
+                    (i * DWC_EP_REG_OFFSET));
+               DWC_DEBUGPL(DBG_CILV, "in_ep_regs[%d]->diepctl=%p\n",
+                           i, &dev_if->in_ep_regs[i]->diepctl);
+               DWC_DEBUGPL(DBG_CILV, "out_ep_regs[%d]->doepctl=%p\n",
+                           i, &dev_if->out_ep_regs[i]->doepctl);
+       }
+
+       dev_if->speed = 0;      // unknown
+
+       core_if->dev_if = dev_if;
+
+       /*
+        * Allocate the Host Mode structures.
+        */
+       host_if = DWC_ALLOC(sizeof(dwc_otg_host_if_t));
+
+       if (host_if == NULL) {
+               DWC_DEBUGPL(DBG_CIL,
+                           "Allocation of dwc_otg_host_if_t failed\n");
+               DWC_FREE(dev_if);
+               DWC_FREE(core_if);
+               return 0;
+       }
+
+       host_if->host_global_regs = (dwc_otg_host_global_regs_t *)
+           (reg_base + DWC_OTG_HOST_GLOBAL_REG_OFFSET);
+
+       host_if->hprt0 =
+           (uint32_t *) (reg_base + DWC_OTG_HOST_PORT_REGS_OFFSET);
+
+       for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+               host_if->hc_regs[i] = (dwc_otg_hc_regs_t *)
+                   (reg_base + DWC_OTG_HOST_CHAN_REGS_OFFSET +
+                    (i * DWC_OTG_CHAN_REGS_OFFSET));
+               DWC_DEBUGPL(DBG_CILV, "hc_reg[%d]->hcchar=%p\n",
+                           i, &host_if->hc_regs[i]->hcchar);
+       }
+
+       host_if->num_host_channels = MAX_EPS_CHANNELS;
+       core_if->host_if = host_if;
+
+       for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+               core_if->data_fifo[i] =
+                   (uint32_t *) (reg_base + DWC_OTG_DATA_FIFO_OFFSET +
+                                 (i * DWC_OTG_DATA_FIFO_SIZE));
+               DWC_DEBUGPL(DBG_CILV, "data_fifo[%d]=0x%08lx\n",
+                           i, (unsigned long)core_if->data_fifo[i]);
+       }
+
+       core_if->pcgcctl = (uint32_t *) (reg_base + DWC_OTG_PCGCCTL_OFFSET);
+
+       /* Initiate lx_state to L3 disconnected state */
+       core_if->lx_state = DWC_OTG_L3;
+       /*
+        * Store the contents of the hardware configuration registers here for
+        * easy access later.
+        */
+       core_if->hwcfg1.d32 =
+           DWC_READ_REG32(&core_if->core_global_regs->ghwcfg1);
+       core_if->hwcfg2.d32 =
+           DWC_READ_REG32(&core_if->core_global_regs->ghwcfg2);
+       core_if->hwcfg3.d32 =
+           DWC_READ_REG32(&core_if->core_global_regs->ghwcfg3);
+       core_if->hwcfg4.d32 =
+           DWC_READ_REG32(&core_if->core_global_regs->ghwcfg4);
+
+       /* Force host mode to get HPTXFSIZ exact power on value */
+       {
+               gusbcfg_data_t gusbcfg = {.d32 = 0 };
+               gusbcfg.d32 =  DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+               gusbcfg.b.force_host_mode = 1;
+               DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg, gusbcfg.d32);
+               dwc_mdelay(100);
+               core_if->hptxfsiz.d32 =
+               DWC_READ_REG32(&core_if->core_global_regs->hptxfsiz);
+               gusbcfg.d32 =  DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+               if (cil_force_host)
+                       gusbcfg.b.force_host_mode = 1;
+               else
+                       gusbcfg.b.force_host_mode = 0;
+               DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg, gusbcfg.d32);
+               dwc_mdelay(100);
+       }
+
+       DWC_DEBUGPL(DBG_CILV, "hwcfg1=%08x\n", core_if->hwcfg1.d32);
+       DWC_DEBUGPL(DBG_CILV, "hwcfg2=%08x\n", core_if->hwcfg2.d32);
+       DWC_DEBUGPL(DBG_CILV, "hwcfg3=%08x\n", core_if->hwcfg3.d32);
+       DWC_DEBUGPL(DBG_CILV, "hwcfg4=%08x\n", core_if->hwcfg4.d32);
+
+       core_if->hcfg.d32 =
+           DWC_READ_REG32(&core_if->host_if->host_global_regs->hcfg);
+       core_if->dcfg.d32 =
+           DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg);
+
+       DWC_DEBUGPL(DBG_CILV, "hcfg=%08x\n", core_if->hcfg.d32);
+       DWC_DEBUGPL(DBG_CILV, "dcfg=%08x\n", core_if->dcfg.d32);
+
+       DWC_DEBUGPL(DBG_CILV, "op_mode=%0x\n", core_if->hwcfg2.b.op_mode);
+       DWC_DEBUGPL(DBG_CILV, "arch=%0x\n", core_if->hwcfg2.b.architecture);
+       DWC_DEBUGPL(DBG_CILV, "num_dev_ep=%d\n", core_if->hwcfg2.b.num_dev_ep);
+       DWC_DEBUGPL(DBG_CILV, "num_host_chan=%d\n",
+                   core_if->hwcfg2.b.num_host_chan);
+       DWC_DEBUGPL(DBG_CILV, "nonperio_tx_q_depth=0x%0x\n",
+                   core_if->hwcfg2.b.nonperio_tx_q_depth);
+       DWC_DEBUGPL(DBG_CILV, "host_perio_tx_q_depth=0x%0x\n",
+                   core_if->hwcfg2.b.host_perio_tx_q_depth);
+       DWC_DEBUGPL(DBG_CILV, "dev_token_q_depth=0x%0x\n",
+                   core_if->hwcfg2.b.dev_token_q_depth);
+
+       DWC_DEBUGPL(DBG_CILV, "Total FIFO SZ=%d\n",
+                   core_if->hwcfg3.b.dfifo_depth);
+       DWC_DEBUGPL(DBG_CILV, "xfer_size_cntr_width=%0x\n",
+                   core_if->hwcfg3.b.xfer_size_cntr_width);
+
+       /*
+        * Set the SRP sucess bit for FS-I2c
+        */
+       core_if->srp_success = 0;
+       core_if->srp_timer_started = 0;
+
+       /*
+        * Create new workqueue and init works
+        */
+       core_if->wq_otg = DWC_WORKQ_ALLOC("dwc_otg");
+       if (core_if->wq_otg == 0) {
+               DWC_WARN("DWC_WORKQ_ALLOC failed\n");
+               DWC_FREE(host_if);
+               DWC_FREE(dev_if);
+               DWC_FREE(core_if);
+               return 0;
+       }
+
+       core_if->snpsid = DWC_READ_REG32(&core_if->core_global_regs->gsnpsid);
+
+       DWC_PRINTF("Core Release: %x.%x%x%x\n",
+                  (core_if->snpsid >> 12 & 0xF),
+                  (core_if->snpsid >> 8 & 0xF),
+                  (core_if->snpsid >> 4 & 0xF), (core_if->snpsid & 0xF));
+
+       core_if->wkp_timer = DWC_TIMER_ALLOC("Wake Up Timer",
+                                            w_wakeup_detected, core_if);
+       if (core_if->wkp_timer == 0) {
+               DWC_WARN("DWC_TIMER_ALLOC failed\n");
+               DWC_FREE(host_if);
+               DWC_FREE(dev_if);
+               DWC_WORKQ_FREE(core_if->wq_otg);
+               DWC_FREE(core_if);
+               return 0;
+       }
+
+       if (dwc_otg_setup_params(core_if)) {
+               DWC_WARN("Error while setting core params\n");
+       }
+
+       core_if->hibernation_suspend = 0;
+
+       /** ADP initialization */
+       dwc_otg_adp_init(core_if);
+
+       return core_if;
+}
+
+/**
+ * This function frees the structures allocated by dwc_otg_cil_init().
+ *
+ * @param core_if The core interface pointer returned from
+ *               dwc_otg_cil_init().
+ *
+ */
+void dwc_otg_cil_remove(dwc_otg_core_if_t * core_if)
+{
+       dctl_data_t dctl = {.d32 = 0 };
+       DWC_DEBUGPL(DBG_CILV, "%s(%p)\n", __func__, core_if);
+
+       /* Disable all interrupts */
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gahbcfg, 1, 0);
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, 0);
+
+       dctl.b.sftdiscon = 1;
+       if (core_if->snpsid >= OTG_CORE_REV_3_00a) {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, 0,
+                                dctl.d32);
+       }
+
+       if (core_if->wq_otg) {
+               DWC_WORKQ_WAIT_WORK_DONE(core_if->wq_otg, 500);
+               DWC_WORKQ_FREE(core_if->wq_otg);
+       }
+       if (core_if->dev_if) {
+               DWC_FREE(core_if->dev_if);
+       }
+       if (core_if->host_if) {
+               DWC_FREE(core_if->host_if);
+       }
+
+       /** Remove ADP Stuff  */
+       dwc_otg_adp_remove(core_if);
+       if (core_if->core_params) {
+               DWC_FREE(core_if->core_params);
+       }
+       if (core_if->wkp_timer) {
+               DWC_TIMER_FREE(core_if->wkp_timer);
+       }
+       if (core_if->srp_timer) {
+               DWC_TIMER_FREE(core_if->srp_timer);
+       }
+       DWC_FREE(core_if);
+}
+
+/**
+ * This function enables the controller's Global Interrupt in the AHB Config
+ * register.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+void dwc_otg_enable_global_interrupts(dwc_otg_core_if_t * core_if)
+{
+       gahbcfg_data_t ahbcfg = {.d32 = 0 };
+       ahbcfg.b.glblintrmsk = 1;       /* Enable interrupts */
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gahbcfg, 0, ahbcfg.d32);
+}
+
+/**
+ * This function disables the controller's Global Interrupt in the AHB Config
+ * register.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+void dwc_otg_disable_global_interrupts(dwc_otg_core_if_t * core_if)
+{
+       gahbcfg_data_t ahbcfg = {.d32 = 0 };
+       ahbcfg.b.glblintrmsk = 1;       /* Disable interrupts */
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gahbcfg, ahbcfg.d32, 0);
+}
+
+/**
+ * This function initializes the commmon interrupts, used in both
+ * device and host modes.
+ *
+ * @param core_if Programming view of the DWC_otg controller
+ *
+ */
+static void dwc_otg_enable_common_interrupts(dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       /* Clear any pending OTG Interrupts */
+       DWC_WRITE_REG32(&global_regs->gotgint, 0xFFFFFFFF);
+
+       /* Clear any pending interrupts */
+       DWC_WRITE_REG32(&global_regs->gintsts, 0xFFFFFFFF);
+
+       /*
+        * Enable the interrupts in the GINTMSK.
+        */
+       intr_mask.b.modemismatch = 1;
+       intr_mask.b.otgintr = 1;
+
+       if (!core_if->dma_enable) {
+               intr_mask.b.rxstsqlvl = 1;
+       }
+
+       intr_mask.b.conidstschng = 1;
+       intr_mask.b.wkupintr = 1;
+       intr_mask.b.disconnect = 0;
+       intr_mask.b.usbsuspend = 1;
+       intr_mask.b.sessreqintr = 1;
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       if (core_if->core_params->lpm_enable) {
+               intr_mask.b.lpmtranrcvd = 1;
+       }
+#endif
+       DWC_WRITE_REG32(&global_regs->gintmsk, intr_mask.d32);
+}
+
+/*
+ * The restore operation is modified to support Synopsys Emulated Powerdown and
+ * Hibernation. This function is for exiting from Device mode hibernation by
+ * Host Initiated Resume/Reset and Device Initiated Remote-Wakeup.
+ * @param core_if Programming view of DWC_otg controller.
+ * @param rem_wakeup - indicates whether resume is initiated by Device or Host.
+ * @param reset - indicates whether resume is initiated by Reset.
+ */
+int dwc_otg_device_hibernation_restore(dwc_otg_core_if_t * core_if,
+                                      int rem_wakeup, int reset)
+{
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+       pcgcctl_data_t pcgcctl = {.d32 = 0 };
+       dctl_data_t dctl = {.d32 = 0 };
+
+       int timeout = 2000;
+
+       if (!core_if->hibernation_suspend) {
+               DWC_PRINTF("Already exited from Hibernation\n");
+               return 1;
+       }
+
+       DWC_DEBUGPL(DBG_PCD, "%s called\n", __FUNCTION__);
+       /* Switch-on voltage to the core */
+       gpwrdn.b.pwrdnswtch = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Reset core */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Assert Restore signal */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.restore = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+       dwc_udelay(10);
+
+       /* Disable power clamps */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnclmp = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       if (rem_wakeup) {
+               dwc_udelay(70);
+       }
+
+       /* Deassert Reset core */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+       dwc_udelay(10);
+
+       /* Disable PMU interrupt */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuintsel = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       /* Mask interrupts from gpwrdn */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.connect_det_msk = 1;
+       gpwrdn.b.srp_det_msk = 1;
+       gpwrdn.b.disconn_det_msk = 1;
+       gpwrdn.b.rst_det_msk = 1;
+       gpwrdn.b.lnstchng_msk = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       /* Indicates that we are going out from hibernation */
+       core_if->hibernation_suspend = 0;
+
+       /*
+        * Set Restore Essential Regs bit in PCGCCTL register, restore_mode = 1
+        * indicates restore from remote_wakeup
+        */
+       restore_essential_regs(core_if, rem_wakeup, 0);
+
+       /*
+        * Wait a little for seeing new value of variable hibernation_suspend if
+        * Restore done interrupt received before polling
+        */
+       dwc_udelay(10);
+
+       if (core_if->hibernation_suspend == 0) {
+               /*
+                * Wait For Restore_done Interrupt. This mechanism of polling the
+                * interrupt is introduced to avoid any possible race conditions
+                */
+               do {
+                       gintsts_data_t gintsts;
+                       gintsts.d32 =
+                           DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+                       if (gintsts.b.restoredone) {
+                               gintsts.d32 = 0;
+                               gintsts.b.restoredone = 1;
+                               DWC_WRITE_REG32(&core_if->core_global_regs->
+                                               gintsts, gintsts.d32);
+                               DWC_PRINTF("Restore Done Interrupt seen\n");
+                               break;
+                       }
+                       dwc_udelay(10);
+               } while (--timeout);
+               if (!timeout) {
+                       DWC_PRINTF("Restore Done interrupt wasn't generated here\n");
+               }
+       }
+       /* Clear all pending interupts */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+
+       /* De-assert Restore */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.restore = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       if (!rem_wakeup) {
+               pcgcctl.d32 = 0;
+               pcgcctl.b.rstpdwnmodule = 1;
+               DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32, 0);
+       }
+
+       /* Restore GUSBCFG and DCFG */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg,
+                       core_if->gr_backup->gusbcfg_local);
+       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dcfg,
+                       core_if->dr_backup->dcfg);
+
+       /* De-assert Wakeup Logic */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuactv = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       if (!rem_wakeup) {
+               /* Set Device programming done bit */
+               dctl.b.pwronprgdone = 1;
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, 0, dctl.d32);
+       } else {
+               /* Start Remote Wakeup Signaling */
+               dctl.d32 = core_if->dr_backup->dctl;
+               dctl.b.rmtwkupsig = 1;
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dctl, dctl.d32);
+       }
+
+       dwc_mdelay(2);
+       /* Clear all pending interupts */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+
+       /* Restore global registers */
+       dwc_otg_restore_global_regs(core_if);
+       /* Restore device global registers */
+       dwc_otg_restore_dev_regs(core_if, rem_wakeup);
+
+       if (rem_wakeup) {
+               dwc_mdelay(7);
+               dctl.d32 = 0;
+               dctl.b.rmtwkupsig = 1;
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, dctl.d32, 0);
+       }
+
+       core_if->hibernation_suspend = 0;
+       /* The core will be in ON STATE */
+       core_if->lx_state = DWC_OTG_L0;
+       DWC_PRINTF("Hibernation recovery completes here\n");
+
+       return 1;
+}
+
+/*
+ * The restore operation is modified to support Synopsys Emulated Powerdown and
+ * Hibernation. This function is for exiting from Host mode hibernation by
+ * Host Initiated Resume/Reset and Device Initiated Remote-Wakeup.
+ * @param core_if Programming view of DWC_otg controller.
+ * @param rem_wakeup - indicates whether resume is initiated by Device or Host.
+ * @param reset - indicates whether resume is initiated by Reset.
+ */
+int dwc_otg_host_hibernation_restore(dwc_otg_core_if_t * core_if,
+                                    int rem_wakeup, int reset)
+{
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+       hprt0_data_t hprt0 = {.d32 = 0 };
+
+       int timeout = 2000;
+
+       DWC_DEBUGPL(DBG_HCD, "%s called\n", __FUNCTION__);
+       /* Switch-on voltage to the core */
+       gpwrdn.b.pwrdnswtch = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Reset core */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Assert Restore signal */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.restore = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+       dwc_udelay(10);
+
+       /* Disable power clamps */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnclmp = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       if (!rem_wakeup) {
+               dwc_udelay(50);
+       }
+
+       /* Deassert Reset core */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+       dwc_udelay(10);
+
+       /* Disable PMU interrupt */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuintsel = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       gpwrdn.d32 = 0;
+       gpwrdn.b.connect_det_msk = 1;
+       gpwrdn.b.srp_det_msk = 1;
+       gpwrdn.b.disconn_det_msk = 1;
+       gpwrdn.b.rst_det_msk = 1;
+       gpwrdn.b.lnstchng_msk = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       /* Indicates that we are going out from hibernation */
+       core_if->hibernation_suspend = 0;
+
+       /* Set Restore Essential Regs bit in PCGCCTL register */
+       restore_essential_regs(core_if, rem_wakeup, 1);
+
+       /* Wait a little for seeing new value of variable hibernation_suspend if
+        * Restore done interrupt received before polling */
+       dwc_udelay(10);
+
+       if (core_if->hibernation_suspend == 0) {
+               /* Wait For Restore_done Interrupt. This mechanism of polling the
+                * interrupt is introduced to avoid any possible race conditions
+                */
+               do {
+                       gintsts_data_t gintsts;
+                       gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+                       if (gintsts.b.restoredone) {
+                               gintsts.d32 = 0;
+                               gintsts.b.restoredone = 1;
+                       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+                               DWC_DEBUGPL(DBG_HCD,"Restore Done Interrupt seen\n");
+                               break;
+                       }
+                       dwc_udelay(10);
+               } while (--timeout);
+               if (!timeout) {
+                       DWC_WARN("Restore Done interrupt wasn't generated\n");
+               }
+       }
+
+       /* Set the flag's value to 0 again after receiving restore done interrupt */
+       core_if->hibernation_suspend = 0;
+
+       /* This step is not described in functional spec but if not wait for this
+        * delay, mismatch interrupts occurred because just after restore core is
+        * in Device mode(gintsts.curmode == 0) */
+       dwc_mdelay(100);
+
+       /* Clear all pending interrupts */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+
+       /* De-assert Restore */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.restore = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Restore GUSBCFG and HCFG */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg,
+                       core_if->gr_backup->gusbcfg_local);
+       DWC_WRITE_REG32(&core_if->host_if->host_global_regs->hcfg,
+                       core_if->hr_backup->hcfg_local);
+
+       /* De-assert Wakeup Logic */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuactv = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Start the Resume operation by programming HPRT0 */
+       hprt0.d32 = core_if->hr_backup->hprt0_local;
+       hprt0.b.prtpwr = 1;
+       hprt0.b.prtena = 0;
+       hprt0.b.prtsusp = 0;
+       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+
+       DWC_PRINTF("Resume Starts Now\n");
+       if (!reset) {           // Indicates it is Resume Operation
+               hprt0.d32 = core_if->hr_backup->hprt0_local;
+               hprt0.b.prtres = 1;
+               hprt0.b.prtpwr = 1;
+               hprt0.b.prtena = 0;
+               hprt0.b.prtsusp = 0;
+               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+
+               if (!rem_wakeup)
+                       hprt0.b.prtres = 0;
+               /* Wait for Resume time and then program HPRT again */
+               dwc_mdelay(100);
+               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+
+       } else {                // Indicates it is Reset Operation
+               hprt0.d32 = core_if->hr_backup->hprt0_local;
+               hprt0.b.prtrst = 1;
+               hprt0.b.prtpwr = 1;
+               hprt0.b.prtena = 0;
+               hprt0.b.prtsusp = 0;
+               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+               /* Wait for Reset time and then program HPRT again */
+               dwc_mdelay(60);
+               hprt0.b.prtrst = 0;
+               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+       }
+       /* Clear all interrupt status */
+       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+       hprt0.b.prtconndet = 1;
+       hprt0.b.prtenchng = 1;
+       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+
+       /* Clear all pending interupts */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+
+       /* Restore global registers */
+       dwc_otg_restore_global_regs(core_if);
+       /* Restore host global registers */
+       dwc_otg_restore_host_regs(core_if, reset);
+
+       /* The core will be in ON STATE */
+       core_if->lx_state = DWC_OTG_L0;
+       DWC_PRINTF("Hibernation recovery is complete here\n");
+       return 0;
+}
+
+/** Saves some register values into system memory. */
+int dwc_otg_save_global_regs(dwc_otg_core_if_t * core_if)
+{
+       struct dwc_otg_global_regs_backup *gr;
+       int i;
+
+       gr = core_if->gr_backup;
+       if (!gr) {
+               gr = DWC_ALLOC(sizeof(*gr));
+               if (!gr) {
+                       return -DWC_E_NO_MEMORY;
+               }
+               core_if->gr_backup = gr;
+       }
+
+       gr->gotgctl_local = DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
+       gr->gintmsk_local = DWC_READ_REG32(&core_if->core_global_regs->gintmsk);
+       gr->gahbcfg_local = DWC_READ_REG32(&core_if->core_global_regs->gahbcfg);
+       gr->gusbcfg_local = DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+       gr->grxfsiz_local = DWC_READ_REG32(&core_if->core_global_regs->grxfsiz);
+       gr->gnptxfsiz_local = DWC_READ_REG32(&core_if->core_global_regs->gnptxfsiz);
+       gr->hptxfsiz_local = DWC_READ_REG32(&core_if->core_global_regs->hptxfsiz);
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       gr->glpmcfg_local = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+#endif
+       gr->gi2cctl_local = DWC_READ_REG32(&core_if->core_global_regs->gi2cctl);
+       gr->pcgcctl_local = DWC_READ_REG32(core_if->pcgcctl);
+       gr->gdfifocfg_local =
+           DWC_READ_REG32(&core_if->core_global_regs->gdfifocfg);
+       for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+               gr->dtxfsiz_local[i] =
+                   DWC_READ_REG32(&(core_if->core_global_regs->dtxfsiz[i]));
+       }
+
+       DWC_DEBUGPL(DBG_ANY, "===========Backing Global registers==========\n");
+       DWC_DEBUGPL(DBG_ANY, "Backed up gotgctl   = %08x\n", gr->gotgctl_local);
+       DWC_DEBUGPL(DBG_ANY, "Backed up gintmsk   = %08x\n", gr->gintmsk_local);
+       DWC_DEBUGPL(DBG_ANY, "Backed up gahbcfg   = %08x\n", gr->gahbcfg_local);
+       DWC_DEBUGPL(DBG_ANY, "Backed up gusbcfg   = %08x\n", gr->gusbcfg_local);
+       DWC_DEBUGPL(DBG_ANY, "Backed up grxfsiz   = %08x\n", gr->grxfsiz_local);
+       DWC_DEBUGPL(DBG_ANY, "Backed up gnptxfsiz = %08x\n",
+                   gr->gnptxfsiz_local);
+       DWC_DEBUGPL(DBG_ANY, "Backed up hptxfsiz  = %08x\n",
+                   gr->hptxfsiz_local);
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       DWC_DEBUGPL(DBG_ANY, "Backed up glpmcfg   = %08x\n", gr->glpmcfg_local);
+#endif
+       DWC_DEBUGPL(DBG_ANY, "Backed up gi2cctl   = %08x\n", gr->gi2cctl_local);
+       DWC_DEBUGPL(DBG_ANY, "Backed up pcgcctl   = %08x\n", gr->pcgcctl_local);
+       DWC_DEBUGPL(DBG_ANY,"Backed up gdfifocfg   = %08x\n",gr->gdfifocfg_local);
+
+       return 0;
+}
+
+/** Saves GINTMSK register before setting the msk bits. */
+int dwc_otg_save_gintmsk_reg(dwc_otg_core_if_t * core_if)
+{
+       struct dwc_otg_global_regs_backup *gr;
+
+       gr = core_if->gr_backup;
+       if (!gr) {
+               gr = DWC_ALLOC(sizeof(*gr));
+               if (!gr) {
+                       return -DWC_E_NO_MEMORY;
+               }
+               core_if->gr_backup = gr;
+       }
+
+       gr->gintmsk_local = DWC_READ_REG32(&core_if->core_global_regs->gintmsk);
+
+       DWC_DEBUGPL(DBG_ANY,"=============Backing GINTMSK registers============\n");
+       DWC_DEBUGPL(DBG_ANY, "Backed up gintmsk   = %08x\n", gr->gintmsk_local);
+
+       return 0;
+}
+
+int dwc_otg_save_dev_regs(dwc_otg_core_if_t * core_if)
+{
+       struct dwc_otg_dev_regs_backup *dr;
+       int i;
+
+       dr = core_if->dr_backup;
+       if (!dr) {
+               dr = DWC_ALLOC(sizeof(*dr));
+               if (!dr) {
+                       return -DWC_E_NO_MEMORY;
+               }
+               core_if->dr_backup = dr;
+       }
+
+       dr->dcfg = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg);
+       dr->dctl = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dctl);
+       dr->daintmsk =
+           DWC_READ_REG32(&core_if->dev_if->dev_global_regs->daintmsk);
+       dr->diepmsk =
+           DWC_READ_REG32(&core_if->dev_if->dev_global_regs->diepmsk);
+       dr->doepmsk =
+           DWC_READ_REG32(&core_if->dev_if->dev_global_regs->doepmsk);
+
+       for (i = 0; i < core_if->dev_if->num_in_eps; ++i) {
+               dr->diepctl[i] =
+                   DWC_READ_REG32(&core_if->dev_if->in_ep_regs[i]->diepctl);
+               dr->dieptsiz[i] =
+                   DWC_READ_REG32(&core_if->dev_if->in_ep_regs[i]->dieptsiz);
+               dr->diepdma[i] =
+                   DWC_READ_REG32(&core_if->dev_if->in_ep_regs[i]->diepdma);
+       }
+
+       DWC_DEBUGPL(DBG_ANY,
+                   "=============Backing Host registers==============\n");
+       DWC_DEBUGPL(DBG_ANY, "Backed up dcfg            = %08x\n", dr->dcfg);
+       DWC_DEBUGPL(DBG_ANY, "Backed up dctl        = %08x\n", dr->dctl);
+       DWC_DEBUGPL(DBG_ANY, "Backed up daintmsk            = %08x\n",
+                   dr->daintmsk);
+       DWC_DEBUGPL(DBG_ANY, "Backed up diepmsk        = %08x\n", dr->diepmsk);
+       DWC_DEBUGPL(DBG_ANY, "Backed up doepmsk        = %08x\n", dr->doepmsk);
+       for (i = 0; i < core_if->dev_if->num_in_eps; ++i) {
+               DWC_DEBUGPL(DBG_ANY, "Backed up diepctl[%d]        = %08x\n", i,
+                           dr->diepctl[i]);
+               DWC_DEBUGPL(DBG_ANY, "Backed up dieptsiz[%d]        = %08x\n",
+                           i, dr->dieptsiz[i]);
+               DWC_DEBUGPL(DBG_ANY, "Backed up diepdma[%d]        = %08x\n", i,
+                           dr->diepdma[i]);
+       }
+
+       return 0;
+}
+
+int dwc_otg_save_host_regs(dwc_otg_core_if_t * core_if)
+{
+       struct dwc_otg_host_regs_backup *hr;
+       int i;
+
+       hr = core_if->hr_backup;
+       if (!hr) {
+               hr = DWC_ALLOC(sizeof(*hr));
+               if (!hr) {
+                       return -DWC_E_NO_MEMORY;
+               }
+               core_if->hr_backup = hr;
+       }
+
+       hr->hcfg_local =
+           DWC_READ_REG32(&core_if->host_if->host_global_regs->hcfg);
+       hr->haintmsk_local =
+           DWC_READ_REG32(&core_if->host_if->host_global_regs->haintmsk);
+       for (i = 0; i < dwc_otg_get_param_host_channels(core_if); ++i) {
+               hr->hcintmsk_local[i] =
+                   DWC_READ_REG32(&core_if->host_if->hc_regs[i]->hcintmsk);
+       }
+       hr->hprt0_local = DWC_READ_REG32(core_if->host_if->hprt0);
+       hr->hfir_local =
+           DWC_READ_REG32(&core_if->host_if->host_global_regs->hfir);
+
+       DWC_DEBUGPL(DBG_ANY,
+                   "=============Backing Host registers===============\n");
+       DWC_DEBUGPL(DBG_ANY, "Backed up hcfg            = %08x\n",
+                   hr->hcfg_local);
+       DWC_DEBUGPL(DBG_ANY, "Backed up haintmsk = %08x\n", hr->haintmsk_local);
+       for (i = 0; i < dwc_otg_get_param_host_channels(core_if); ++i) {
+               DWC_DEBUGPL(DBG_ANY, "Backed up hcintmsk[%02d]=%08x\n", i,
+                           hr->hcintmsk_local[i]);
+       }
+       DWC_DEBUGPL(DBG_ANY, "Backed up hprt0           = %08x\n",
+                   hr->hprt0_local);
+       DWC_DEBUGPL(DBG_ANY, "Backed up hfir           = %08x\n",
+                   hr->hfir_local);
+
+       return 0;
+}
+
+int dwc_otg_restore_global_regs(dwc_otg_core_if_t *core_if)
+{
+       struct dwc_otg_global_regs_backup *gr;
+       int i;
+
+       gr = core_if->gr_backup;
+       if (!gr) {
+               return -DWC_E_INVALID;
+       }
+
+       DWC_WRITE_REG32(&core_if->core_global_regs->gotgctl, gr->gotgctl_local);
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, gr->gintmsk_local);
+       DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg, gr->gusbcfg_local);
+       DWC_WRITE_REG32(&core_if->core_global_regs->gahbcfg, gr->gahbcfg_local);
+       DWC_WRITE_REG32(&core_if->core_global_regs->grxfsiz, gr->grxfsiz_local);
+       DWC_WRITE_REG32(&core_if->core_global_regs->gnptxfsiz,
+                       gr->gnptxfsiz_local);
+       DWC_WRITE_REG32(&core_if->core_global_regs->hptxfsiz,
+                       gr->hptxfsiz_local);
+       DWC_WRITE_REG32(&core_if->core_global_regs->gdfifocfg,
+                       gr->gdfifocfg_local);
+       for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+               DWC_WRITE_REG32(&core_if->core_global_regs->dtxfsiz[i],
+                               gr->dtxfsiz_local[i]);
+       }
+
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+       DWC_WRITE_REG32(core_if->host_if->hprt0, 0x0000100A);
+       DWC_WRITE_REG32(&core_if->core_global_regs->gahbcfg,
+                       (gr->gahbcfg_local));
+       return 0;
+}
+
+int dwc_otg_restore_dev_regs(dwc_otg_core_if_t * core_if, int rem_wakeup)
+{
+       struct dwc_otg_dev_regs_backup *dr;
+       int i;
+
+       dr = core_if->dr_backup;
+
+       if (!dr) {
+               return -DWC_E_INVALID;
+       }
+
+       if (!rem_wakeup) {
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dctl,
+                               dr->dctl);
+       }
+
+       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->daintmsk, dr->daintmsk);
+       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->diepmsk, dr->diepmsk);
+       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->doepmsk, dr->doepmsk);
+
+       for (i = 0; i < core_if->dev_if->num_in_eps; ++i) {
+               DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[i]->dieptsiz, dr->dieptsiz[i]);
+               DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[i]->diepdma, dr->diepdma[i]);
+               DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[i]->diepctl, dr->diepctl[i]);
+       }
+
+       return 0;
+}
+
+int dwc_otg_restore_host_regs(dwc_otg_core_if_t * core_if, int reset)
+{
+       struct dwc_otg_host_regs_backup *hr;
+       int i;
+       hr = core_if->hr_backup;
+
+       if (!hr) {
+               return -DWC_E_INVALID;
+       }
+
+       DWC_WRITE_REG32(&core_if->host_if->host_global_regs->hcfg, hr->hcfg_local);
+       //if (!reset)
+       //{
+       //      DWC_WRITE_REG32(&core_if->host_if->host_global_regs->hfir, hr->hfir_local);
+       //}
+
+       DWC_WRITE_REG32(&core_if->host_if->host_global_regs->haintmsk,
+                       hr->haintmsk_local);
+       for (i = 0; i < dwc_otg_get_param_host_channels(core_if); ++i) {
+               DWC_WRITE_REG32(&core_if->host_if->hc_regs[i]->hcintmsk,
+                               hr->hcintmsk_local[i]);
+       }
+
+       return 0;
+}
+
+int restore_lpm_i2c_regs(dwc_otg_core_if_t * core_if)
+{
+       struct dwc_otg_global_regs_backup *gr;
+
+       gr = core_if->gr_backup;
+
+       /* Restore values for LPM and I2C */
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       DWC_WRITE_REG32(&core_if->core_global_regs->glpmcfg, gr->glpmcfg_local);
+#endif
+       DWC_WRITE_REG32(&core_if->core_global_regs->gi2cctl, gr->gi2cctl_local);
+
+       return 0;
+}
+
+int restore_essential_regs(dwc_otg_core_if_t * core_if, int rmode, int is_host)
+{
+       struct dwc_otg_global_regs_backup *gr;
+       pcgcctl_data_t pcgcctl = {.d32 = 0 };
+       gahbcfg_data_t gahbcfg = {.d32 = 0 };
+       gusbcfg_data_t gusbcfg = {.d32 = 0 };
+       gintmsk_data_t gintmsk = {.d32 = 0 };
+
+       /* Restore LPM and I2C registers */
+       restore_lpm_i2c_regs(core_if);
+
+       /* Set PCGCCTL to 0 */
+       DWC_WRITE_REG32(core_if->pcgcctl, 0x00000000);
+
+       gr = core_if->gr_backup;
+       /* Load restore values for [31:14] bits */
+       DWC_WRITE_REG32(core_if->pcgcctl,
+                       ((gr->pcgcctl_local & 0xffffc000) | 0x00020000));
+
+       /* Umnask global Interrupt in GAHBCFG and restore it */
+       gahbcfg.d32 = gr->gahbcfg_local;
+       gahbcfg.b.glblintrmsk = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gahbcfg, gahbcfg.d32);
+
+       /* Clear all pending interupts */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+
+       /* Unmask restore done interrupt */
+       gintmsk.b.restoredone = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, gintmsk.d32);
+
+       /* Restore GUSBCFG and HCFG/DCFG */
+       gusbcfg.d32 = core_if->gr_backup->gusbcfg_local;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg, gusbcfg.d32);
+
+       if (is_host) {
+               hcfg_data_t hcfg = {.d32 = 0 };
+               hcfg.d32 = core_if->hr_backup->hcfg_local;
+               DWC_WRITE_REG32(&core_if->host_if->host_global_regs->hcfg,
+                               hcfg.d32);
+
+               /* Load restore values for [31:14] bits */
+               pcgcctl.d32 = gr->pcgcctl_local & 0xffffc000;
+               pcgcctl.d32 = gr->pcgcctl_local | 0x00020000;
+
+               if (rmode)
+                       pcgcctl.b.restoremode = 1;
+               DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
+               dwc_udelay(10);
+
+               /* Load restore values for [31:14] bits and set EssRegRestored bit */
+               pcgcctl.d32 = gr->pcgcctl_local | 0xffffc000;
+               pcgcctl.d32 = gr->pcgcctl_local & 0xffffc000;
+               pcgcctl.b.ess_reg_restored = 1;
+               if (rmode)
+                       pcgcctl.b.restoremode = 1;
+               DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
+       } else {
+               dcfg_data_t dcfg = {.d32 = 0 };
+               dcfg.d32 = core_if->dr_backup->dcfg;
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dcfg, dcfg.d32);
+
+               /* Load restore values for [31:14] bits */
+               pcgcctl.d32 = gr->pcgcctl_local & 0xffffc000;
+               pcgcctl.d32 = gr->pcgcctl_local | 0x00020000;
+               if (!rmode) {
+                       pcgcctl.d32 |= 0x208;
+               }
+               DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
+               dwc_udelay(10);
+
+               /* Load restore values for [31:14] bits */
+               pcgcctl.d32 = gr->pcgcctl_local & 0xffffc000;
+               pcgcctl.d32 = gr->pcgcctl_local | 0x00020000;
+               pcgcctl.b.ess_reg_restored = 1;
+               if (!rmode)
+                       pcgcctl.d32 |= 0x208;
+               DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
+       }
+
+       return 0;
+}
+
+/**
+ * Initializes the FSLSPClkSel field of the HCFG register depending on the PHY
+ * type.
+ */
+static void init_fslspclksel(dwc_otg_core_if_t * core_if)
+{
+       uint32_t val;
+       hcfg_data_t hcfg;
+
+       if (((core_if->hwcfg2.b.hs_phy_type == 2) &&
+            (core_if->hwcfg2.b.fs_phy_type == 1) &&
+            (core_if->core_params->ulpi_fs_ls)) ||
+           (core_if->core_params->phy_type == DWC_PHY_TYPE_PARAM_FS)) {
+               /* Full speed PHY */
+               val = DWC_HCFG_48_MHZ;
+       } else {
+               /* High speed PHY running at full speed or high speed */
+               val = DWC_HCFG_30_60_MHZ;
+       }
+
+       DWC_DEBUGPL(DBG_CIL, "Initializing HCFG.FSLSPClkSel to 0x%1x\n", val);
+       hcfg.d32 = DWC_READ_REG32(&core_if->host_if->host_global_regs->hcfg);
+       hcfg.b.fslspclksel = val;
+       DWC_WRITE_REG32(&core_if->host_if->host_global_regs->hcfg, hcfg.d32);
+}
+
+/**
+ * Initializes the DevSpd field of the DCFG register depending on the PHY type
+ * and the enumeration speed of the device.
+ */
+static void init_devspd(dwc_otg_core_if_t * core_if)
+{
+       uint32_t val;
+       dcfg_data_t dcfg;
+
+       if (((core_if->hwcfg2.b.hs_phy_type == 2) &&
+            (core_if->hwcfg2.b.fs_phy_type == 1) &&
+            (core_if->core_params->ulpi_fs_ls)) ||
+           (core_if->core_params->phy_type == DWC_PHY_TYPE_PARAM_FS)) {
+               /* Full speed PHY */
+               val = 0x3;
+       } else if (core_if->core_params->speed == DWC_SPEED_PARAM_FULL) {
+               /* High speed PHY running at full speed */
+               val = 0x1;
+       } else {
+               /* High speed PHY running at high speed */
+               val = 0x0;
+       }
+
+       DWC_DEBUGPL(DBG_CIL, "Initializing DCFG.DevSpd to 0x%1x\n", val);
+
+       dcfg.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg);
+       dcfg.b.devspd = val;
+       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dcfg, dcfg.d32);
+}
+
+/**
+ * This function calculates the number of IN EPS
+ * using GHWCFG1 and GHWCFG2 registers values
+ *
+ * @param core_if Programming view of the DWC_otg controller
+ */
+static uint32_t calc_num_in_eps(dwc_otg_core_if_t * core_if)
+{
+       uint32_t num_in_eps = 0;
+       uint32_t num_eps = core_if->hwcfg2.b.num_dev_ep;
+       uint32_t hwcfg1 = core_if->hwcfg1.d32 >> 3;
+       uint32_t num_tx_fifos = core_if->hwcfg4.b.num_in_eps;
+       int i;
+
+       for (i = 0; i < num_eps; ++i) {
+               if (!(hwcfg1 & 0x1))
+                       num_in_eps++;
+
+               hwcfg1 >>= 2;
+       }
+
+       if (core_if->hwcfg4.b.ded_fifo_en) {
+               num_in_eps =
+                   (num_in_eps > num_tx_fifos) ? num_tx_fifos : num_in_eps;
+       }
+
+       return num_in_eps;
+}
+
+/**
+ * This function calculates the number of OUT EPS
+ * using GHWCFG1 and GHWCFG2 registers values
+ *
+ * @param core_if Programming view of the DWC_otg controller
+ */
+static uint32_t calc_num_out_eps(dwc_otg_core_if_t * core_if)
+{
+       uint32_t num_out_eps = 0;
+       uint32_t num_eps = core_if->hwcfg2.b.num_dev_ep;
+       uint32_t hwcfg1 = core_if->hwcfg1.d32 >> 2;
+       int i;
+
+       for (i = 0; i < num_eps; ++i) {
+               if (!(hwcfg1 & 0x1))
+                       num_out_eps++;
+
+               hwcfg1 >>= 2;
+       }
+       return num_out_eps;
+}
+
+/**
+ * This function initializes the DWC_otg controller registers and
+ * prepares the core for device mode or host mode operation.
+ *
+ * @param core_if Programming view of the DWC_otg controller
+ *
+ */
+void dwc_otg_core_init(dwc_otg_core_if_t * core_if)
+{
+       int i = 0;
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       gahbcfg_data_t ahbcfg = {.d32 = 0 };
+       gusbcfg_data_t usbcfg = {.d32 = 0 };
+       gi2cctl_data_t i2cctl = {.d32 = 0 };
+
+       DWC_DEBUGPL(DBG_CILV, "dwc_otg_core_init(%p) regs at %p\n",
+                    core_if, global_regs);
+
+       /* Common Initialization */
+       usbcfg.d32 = DWC_READ_REG32(&global_regs->gusbcfg);
+
+       /* Program the ULPI External VBUS bit if needed */
+       usbcfg.b.ulpi_ext_vbus_drv =
+           (core_if->core_params->phy_ulpi_ext_vbus ==
+            DWC_PHY_ULPI_EXTERNAL_VBUS) ? 1 : 0;
+
+       /* Set external TS Dline pulsing */
+       usbcfg.b.term_sel_dl_pulse =
+           (core_if->core_params->ts_dline == 1) ? 1 : 0;
+       DWC_WRITE_REG32(&global_regs->gusbcfg, usbcfg.d32);
+
+       /* Reset the Controller */
+       dwc_otg_core_reset(core_if);
+
+       core_if->adp_enable = core_if->core_params->adp_supp_enable;
+       core_if->power_down = core_if->core_params->power_down;
+       core_if->otg_sts = 0;
+
+       /* Initialize parameters from Hardware configuration registers. */
+       dev_if->num_in_eps = calc_num_in_eps(core_if);
+       dev_if->num_out_eps = calc_num_out_eps(core_if);
+
+       DWC_DEBUGPL(DBG_CIL, "num_dev_perio_in_ep=%d\n",
+                   core_if->hwcfg4.b.num_dev_perio_in_ep);
+
+       for (i = 0; i < core_if->hwcfg4.b.num_dev_perio_in_ep; i++) {
+               dev_if->perio_tx_fifo_size[i] =
+                   DWC_READ_REG32(&global_regs->dtxfsiz[i]) >> 16;
+               DWC_DEBUGPL(DBG_CIL, "Periodic Tx FIFO SZ #%d=0x%0x\n",
+                           i, dev_if->perio_tx_fifo_size[i]);
+       }
+
+       for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+               dev_if->tx_fifo_size[i] =
+                   DWC_READ_REG32(&global_regs->dtxfsiz[i]) >> 16;
+               DWC_DEBUGPL(DBG_CIL, "Tx FIFO SZ #%d=0x%0x\n",
+                           i, dev_if->tx_fifo_size[i]);
+       }
+
+       core_if->total_fifo_size = core_if->hwcfg3.b.dfifo_depth;
+       core_if->rx_fifo_size = DWC_READ_REG32(&global_regs->grxfsiz);
+       core_if->nperio_tx_fifo_size =
+           DWC_READ_REG32(&global_regs->gnptxfsiz) >> 16;
+
+       DWC_DEBUGPL(DBG_CIL, "Total FIFO SZ=%d\n", core_if->total_fifo_size);
+       DWC_DEBUGPL(DBG_CIL, "Rx FIFO SZ=%d\n", core_if->rx_fifo_size);
+       DWC_DEBUGPL(DBG_CIL, "NP Tx FIFO SZ=%d\n",
+                   core_if->nperio_tx_fifo_size);
+
+       /* This programming sequence needs to happen in FS mode before any other
+        * programming occurs */
+       if ((core_if->core_params->speed == DWC_SPEED_PARAM_FULL) &&
+           (core_if->core_params->phy_type == DWC_PHY_TYPE_PARAM_FS)) {
+               /* If FS mode with FS PHY */
+
+               /* core_init() is now called on every switch so only call the
+                * following for the first time through. */
+               if (!core_if->phy_init_done) {
+                       core_if->phy_init_done = 1;
+                       DWC_DEBUGPL(DBG_CIL, "FS_PHY detected\n");
+                       usbcfg.d32 = DWC_READ_REG32(&global_regs->gusbcfg);
+                       usbcfg.b.physel = 1;
+                       DWC_WRITE_REG32(&global_regs->gusbcfg, usbcfg.d32);
+
+                       /* Reset after a PHY select */
+                       dwc_otg_core_reset(core_if);
+               }
+
+               /* Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS.      Also
+                * do this on HNP Dev/Host mode switches (done in dev_init and
+                * host_init). */
+               if (dwc_otg_is_host_mode(core_if)) {
+                       init_fslspclksel(core_if);
+               } else {
+                       init_devspd(core_if);
+               }
+
+               if (core_if->core_params->i2c_enable) {
+                       DWC_DEBUGPL(DBG_CIL, "FS_PHY Enabling I2c\n");
+                       /* Program GUSBCFG.OtgUtmifsSel to I2C */
+                       usbcfg.d32 = DWC_READ_REG32(&global_regs->gusbcfg);
+                       usbcfg.b.otgutmifssel = 1;
+                       DWC_WRITE_REG32(&global_regs->gusbcfg, usbcfg.d32);
+
+                       /* Program GI2CCTL.I2CEn */
+                       i2cctl.d32 = DWC_READ_REG32(&global_regs->gi2cctl);
+                       i2cctl.b.i2cdevaddr = 1;
+                       i2cctl.b.i2cen = 0;
+                       DWC_WRITE_REG32(&global_regs->gi2cctl, i2cctl.d32);
+                       i2cctl.b.i2cen = 1;
+                       DWC_WRITE_REG32(&global_regs->gi2cctl, i2cctl.d32);
+               }
+
+       } /* endif speed == DWC_SPEED_PARAM_FULL */
+       else {
+               /* High speed PHY. */
+               if (!core_if->phy_init_done) {
+                       core_if->phy_init_done = 1;
+                       /* HS PHY parameters.  These parameters are preserved
+                        * during soft reset so only program the first time.  Do
+                        * a soft reset immediately after setting phyif.  */
+
+                       if (core_if->core_params->phy_type == 2) {
+                               /* ULPI interface */
+                               usbcfg.b.ulpi_utmi_sel = 1;
+                               usbcfg.b.phyif = 0;
+                               usbcfg.b.ddrsel =
+                                   core_if->core_params->phy_ulpi_ddr;
+                       } else if (core_if->core_params->phy_type == 1) {
+                               /* UTMI+ interface */
+                               usbcfg.b.ulpi_utmi_sel = 0;
+                               if (core_if->core_params->phy_utmi_width == 16) {
+                                       usbcfg.b.phyif = 1;
+
+                               } else {
+                                       usbcfg.b.phyif = 0;
+                               }
+                       } else {
+                               DWC_ERROR("FS PHY TYPE\n");
+                       }
+                       DWC_WRITE_REG32(&global_regs->gusbcfg, usbcfg.d32);
+                       /* Reset after setting the PHY parameters */
+                       dwc_otg_core_reset(core_if);
+               }
+       }
+
+       if ((core_if->hwcfg2.b.hs_phy_type == 2) &&
+           (core_if->hwcfg2.b.fs_phy_type == 1) &&
+           (core_if->core_params->ulpi_fs_ls)) {
+               DWC_DEBUGPL(DBG_CIL, "Setting ULPI FSLS\n");
+               usbcfg.d32 = DWC_READ_REG32(&global_regs->gusbcfg);
+               usbcfg.b.ulpi_fsls = 1;
+               usbcfg.b.ulpi_clk_sus_m = 1;
+               DWC_WRITE_REG32(&global_regs->gusbcfg, usbcfg.d32);
+       } else {
+               usbcfg.d32 = DWC_READ_REG32(&global_regs->gusbcfg);
+               usbcfg.b.ulpi_fsls = 0;
+               usbcfg.b.ulpi_clk_sus_m = 0;
+               DWC_WRITE_REG32(&global_regs->gusbcfg, usbcfg.d32);
+       }
+
+       /* Program the GAHBCFG Register. */
+       switch (core_if->hwcfg2.b.architecture) {
+
+       case DWC_SLAVE_ONLY_ARCH:
+               DWC_DEBUGPL(DBG_CIL, "Slave Only Mode\n");
+               ahbcfg.b.nptxfemplvl_txfemplvl =
+                   DWC_GAHBCFG_TXFEMPTYLVL_HALFEMPTY;
+               ahbcfg.b.ptxfemplvl = DWC_GAHBCFG_TXFEMPTYLVL_HALFEMPTY;
+               core_if->dma_enable = 0;
+               core_if->dma_desc_enable = 0;
+               break;
+
+       case DWC_EXT_DMA_ARCH:
+               DWC_DEBUGPL(DBG_CIL, "External DMA Mode\n");
+               {
+                       uint8_t brst_sz = core_if->core_params->dma_burst_size;
+                       ahbcfg.b.hburstlen = 0;
+                       while (brst_sz > 1) {
+                               ahbcfg.b.hburstlen++;
+                               brst_sz >>= 1;
+                       }
+               }
+               core_if->dma_enable = (core_if->core_params->dma_enable != 0);
+               core_if->dma_desc_enable =
+                   (core_if->core_params->dma_desc_enable != 0);
+               break;
+
+       case DWC_INT_DMA_ARCH:
+               DWC_DEBUGPL(DBG_CIL, "Internal DMA Mode\n");
+               /* Old value was DWC_GAHBCFG_INT_DMA_BURST_INCR - done for
+                 Host mode ISOC in issue fix - vahrama */
+               /* Broadcom had altered to (1<<3)|(0<<0) - WRESP=1, max 4 beats */
+               ahbcfg.b.hburstlen = (1<<3)|(0<<0);//DWC_GAHBCFG_INT_DMA_BURST_INCR4;
+               core_if->dma_enable = (core_if->core_params->dma_enable != 0);
+               core_if->dma_desc_enable =
+                   (core_if->core_params->dma_desc_enable != 0);
+               break;
+
+       }
+       if (core_if->dma_enable) {
+               if (core_if->dma_desc_enable) {
+                       DWC_PRINTF("Using Descriptor DMA mode\n");
+               } else {
+                       DWC_PRINTF("Using Buffer DMA mode\n");
+
+               }
+       } else {
+               DWC_PRINTF("Using Slave mode\n");
+               core_if->dma_desc_enable = 0;
+       }
+
+       if (core_if->core_params->ahb_single) {
+               ahbcfg.b.ahbsingle = 1;
+       }
+
+       ahbcfg.b.dmaenable = core_if->dma_enable;
+       DWC_WRITE_REG32(&global_regs->gahbcfg, ahbcfg.d32);
+
+       core_if->en_multiple_tx_fifo = core_if->hwcfg4.b.ded_fifo_en;
+
+       core_if->pti_enh_enable = core_if->core_params->pti_enable != 0;
+       core_if->multiproc_int_enable = core_if->core_params->mpi_enable;
+       DWC_PRINTF("Periodic Transfer Interrupt Enhancement - %s\n",
+                  ((core_if->pti_enh_enable) ? "enabled" : "disabled"));
+       DWC_PRINTF("Multiprocessor Interrupt Enhancement - %s\n",
+                  ((core_if->multiproc_int_enable) ? "enabled" : "disabled"));
+
+       /*
+        * Program the GUSBCFG register.
+        */
+       usbcfg.d32 = DWC_READ_REG32(&global_regs->gusbcfg);
+
+       switch (core_if->hwcfg2.b.op_mode) {
+       case DWC_MODE_HNP_SRP_CAPABLE:
+               usbcfg.b.hnpcap = (core_if->core_params->otg_cap ==
+                                  DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE);
+               usbcfg.b.srpcap = (core_if->core_params->otg_cap !=
+                                  DWC_OTG_CAP_PARAM_NO_HNP_SRP_CAPABLE);
+               break;
+
+       case DWC_MODE_SRP_ONLY_CAPABLE:
+               usbcfg.b.hnpcap = 0;
+               usbcfg.b.srpcap = (core_if->core_params->otg_cap !=
+                                  DWC_OTG_CAP_PARAM_NO_HNP_SRP_CAPABLE);
+               break;
+
+       case DWC_MODE_NO_HNP_SRP_CAPABLE:
+               usbcfg.b.hnpcap = 0;
+               usbcfg.b.srpcap = 0;
+               break;
+
+       case DWC_MODE_SRP_CAPABLE_DEVICE:
+               usbcfg.b.hnpcap = 0;
+               usbcfg.b.srpcap = (core_if->core_params->otg_cap !=
+                                  DWC_OTG_CAP_PARAM_NO_HNP_SRP_CAPABLE);
+               break;
+
+       case DWC_MODE_NO_SRP_CAPABLE_DEVICE:
+               usbcfg.b.hnpcap = 0;
+               usbcfg.b.srpcap = 0;
+               break;
+
+       case DWC_MODE_SRP_CAPABLE_HOST:
+               usbcfg.b.hnpcap = 0;
+               usbcfg.b.srpcap = (core_if->core_params->otg_cap !=
+                                  DWC_OTG_CAP_PARAM_NO_HNP_SRP_CAPABLE);
+               break;
+
+       case DWC_MODE_NO_SRP_CAPABLE_HOST:
+               usbcfg.b.hnpcap = 0;
+               usbcfg.b.srpcap = 0;
+               break;
+       }
+
+       DWC_WRITE_REG32(&global_regs->gusbcfg, usbcfg.d32);
+
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       if (core_if->core_params->lpm_enable) {
+               glpmcfg_data_t lpmcfg = {.d32 = 0 };
+
+               /* To enable LPM support set lpm_cap_en bit */
+               lpmcfg.b.lpm_cap_en = 1;
+
+               /* Make AppL1Res ACK */
+               lpmcfg.b.appl_resp = 1;
+
+               /* Retry 3 times */
+               lpmcfg.b.retry_count = 3;
+
+               DWC_MODIFY_REG32(&core_if->core_global_regs->glpmcfg,
+                                0, lpmcfg.d32);
+
+       }
+#endif
+       if (core_if->core_params->ic_usb_cap) {
+               gusbcfg_data_t gusbcfg = {.d32 = 0 };
+               gusbcfg.b.ic_usb_cap = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gusbcfg,
+                                0, gusbcfg.d32);
+       }
+       {
+               gotgctl_data_t gotgctl = {.d32 = 0 };
+               gotgctl.b.otgver = core_if->core_params->otg_ver;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gotgctl, 0,
+                                gotgctl.d32);
+               /* Set OTG version supported */
+               core_if->otg_ver = core_if->core_params->otg_ver;
+               DWC_PRINTF("OTG VER PARAM: %d, OTG VER FLAG: %d\n",
+                          core_if->core_params->otg_ver, core_if->otg_ver);
+       }
+
+
+       /* Enable common interrupts */
+       dwc_otg_enable_common_interrupts(core_if);
+
+       /* Do device or host intialization based on mode during PCD
+        * and HCD initialization  */
+       if (dwc_otg_is_host_mode(core_if)) {
+               DWC_DEBUGPL(DBG_ANY, "Host Mode\n");
+               core_if->op_state = A_HOST;
+       } else {
+               DWC_DEBUGPL(DBG_ANY, "Device Mode\n");
+               core_if->op_state = B_PERIPHERAL;
+#ifdef DWC_DEVICE_ONLY
+               dwc_otg_core_dev_init(core_if);
+#endif
+       }
+}
+
+/**
+ * This function enables the Device mode interrupts.
+ *
+ * @param core_if Programming view of DWC_otg controller
+ */
+void dwc_otg_enable_device_interrupts(dwc_otg_core_if_t * core_if)
+{
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+
+       DWC_DEBUGPL(DBG_CIL, "%s()\n", __func__);
+
+       /* Disable all interrupts. */
+       DWC_WRITE_REG32(&global_regs->gintmsk, 0);
+
+       /* Clear any pending interrupts */
+       DWC_WRITE_REG32(&global_regs->gintsts, 0xFFFFFFFF);
+
+       /* Enable the common interrupts */
+       dwc_otg_enable_common_interrupts(core_if);
+
+       /* Enable interrupts */
+       intr_mask.b.usbreset = 1;
+       intr_mask.b.enumdone = 1;
+       /* Disable Disconnect interrupt in Device mode */
+       intr_mask.b.disconnect = 0;
+
+       if (!core_if->multiproc_int_enable) {
+               intr_mask.b.inepintr = 1;
+               intr_mask.b.outepintr = 1;
+       }
+
+       intr_mask.b.erlysuspend = 1;
+
+       if (core_if->en_multiple_tx_fifo == 0) {
+               intr_mask.b.epmismatch = 1;
+       }
+
+       //intr_mask.b.incomplisoout = 1;
+       intr_mask.b.incomplisoin = 1;
+
+/* Enable the ignore frame number for ISOC xfers - MAS */
+/* Disable to support high bandwith ISOC transfers - manukz */
+#if 0
+#ifdef DWC_UTE_PER_IO
+       if (core_if->dma_enable) {
+               if (core_if->dma_desc_enable) {
+                       dctl_data_t dctl1 = {.d32 = 0 };
+                       dctl1.b.ifrmnum = 1;
+                       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->
+                                        dctl, 0, dctl1.d32);
+                       DWC_DEBUG("----Enabled Ignore frame number (0x%08x)",
+                                 DWC_READ_REG32(&core_if->dev_if->
+                                                dev_global_regs->dctl));
+               }
+       }
+#endif
+#endif
+#ifdef DWC_EN_ISOC
+       if (core_if->dma_enable) {
+               if (core_if->dma_desc_enable == 0) {
+                       if (core_if->pti_enh_enable) {
+                               dctl_data_t dctl = {.d32 = 0 };
+                               dctl.b.ifrmnum = 1;
+                               DWC_MODIFY_REG32(&core_if->
+                                                dev_if->dev_global_regs->dctl,
+                                                0, dctl.d32);
+                       } else {
+                               intr_mask.b.incomplisoin = 1;
+                               intr_mask.b.incomplisoout = 1;
+                       }
+               }
+       } else {
+               intr_mask.b.incomplisoin = 1;
+               intr_mask.b.incomplisoout = 1;
+       }
+#endif /* DWC_EN_ISOC */
+
+       /** @todo NGS: Should this be a module parameter? */
+#ifdef USE_PERIODIC_EP
+       intr_mask.b.isooutdrop = 1;
+       intr_mask.b.eopframe = 1;
+       intr_mask.b.incomplisoin = 1;
+       intr_mask.b.incomplisoout = 1;
+#endif
+
+       DWC_MODIFY_REG32(&global_regs->gintmsk, intr_mask.d32, intr_mask.d32);
+
+       DWC_DEBUGPL(DBG_CIL, "%s() gintmsk=%0x\n", __func__,
+                   DWC_READ_REG32(&global_regs->gintmsk));
+}
+
+/**
+ * This function initializes the DWC_otg controller registers for
+ * device mode.
+ *
+ * @param core_if Programming view of DWC_otg controller
+ *
+ */
+void dwc_otg_core_dev_init(dwc_otg_core_if_t * core_if)
+{
+       int i;
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       dwc_otg_core_params_t *params = core_if->core_params;
+       dcfg_data_t dcfg = {.d32 = 0 };
+       depctl_data_t diepctl = {.d32 = 0 };
+       grstctl_t resetctl = {.d32 = 0 };
+       uint32_t rx_fifo_size;
+       fifosize_data_t nptxfifosize;
+       fifosize_data_t txfifosize;
+       dthrctl_data_t dthrctl;
+       fifosize_data_t ptxfifosize;
+       uint16_t rxfsiz, nptxfsiz;
+       gdfifocfg_data_t gdfifocfg = {.d32 = 0 };
+       hwcfg3_data_t hwcfg3 = {.d32 = 0 };
+
+       /* Restart the Phy Clock */
+       DWC_WRITE_REG32(core_if->pcgcctl, 0);
+
+       /* Device configuration register */
+       init_devspd(core_if);
+       dcfg.d32 = DWC_READ_REG32(&dev_if->dev_global_regs->dcfg);
+       dcfg.b.descdma = (core_if->dma_desc_enable) ? 1 : 0;
+       dcfg.b.perfrint = DWC_DCFG_FRAME_INTERVAL_80;
+       /* Enable Device OUT NAK in case of DDMA mode*/
+       if (core_if->core_params->dev_out_nak) {
+               dcfg.b.endevoutnak = 1;
+       }
+
+       if (core_if->core_params->cont_on_bna) {
+               dctl_data_t dctl = {.d32 = 0 };
+               dctl.b.encontonbna = 1;
+               DWC_MODIFY_REG32(&dev_if->dev_global_regs->dctl, 0, dctl.d32);
+       }
+
+
+       DWC_WRITE_REG32(&dev_if->dev_global_regs->dcfg, dcfg.d32);
+
+       /* Configure data FIFO sizes */
+       if (core_if->hwcfg2.b.dynamic_fifo && params->enable_dynamic_fifo) {
+               DWC_DEBUGPL(DBG_CIL, "Total FIFO Size=%d\n",
+                           core_if->total_fifo_size);
+               DWC_DEBUGPL(DBG_CIL, "Rx FIFO Size=%d\n",
+                           params->dev_rx_fifo_size);
+               DWC_DEBUGPL(DBG_CIL, "NP Tx FIFO Size=%d\n",
+                           params->dev_nperio_tx_fifo_size);
+
+               /* Rx FIFO */
+               DWC_DEBUGPL(DBG_CIL, "initial grxfsiz=%08x\n",
+                           DWC_READ_REG32(&global_regs->grxfsiz));
+
+#ifdef DWC_UTE_CFI
+               core_if->pwron_rxfsiz = DWC_READ_REG32(&global_regs->grxfsiz);
+               core_if->init_rxfsiz = params->dev_rx_fifo_size;
+#endif
+               rx_fifo_size = params->dev_rx_fifo_size;
+               DWC_WRITE_REG32(&global_regs->grxfsiz, rx_fifo_size);
+
+               DWC_DEBUGPL(DBG_CIL, "new grxfsiz=%08x\n",
+                           DWC_READ_REG32(&global_regs->grxfsiz));
+
+               /** Set Periodic Tx FIFO Mask all bits 0 */
+               core_if->p_tx_msk = 0;
+
+               /** Set Tx FIFO Mask all bits 0 */
+               core_if->tx_msk = 0;
+
+               if (core_if->en_multiple_tx_fifo == 0) {
+                       /* Non-periodic Tx FIFO */
+                       DWC_DEBUGPL(DBG_CIL, "initial gnptxfsiz=%08x\n",
+                                   DWC_READ_REG32(&global_regs->gnptxfsiz));
+
+                       nptxfifosize.b.depth = params->dev_nperio_tx_fifo_size;
+                       nptxfifosize.b.startaddr = params->dev_rx_fifo_size;
+
+                       DWC_WRITE_REG32(&global_regs->gnptxfsiz,
+                                       nptxfifosize.d32);
+
+                       DWC_DEBUGPL(DBG_CIL, "new gnptxfsiz=%08x\n",
+                                   DWC_READ_REG32(&global_regs->gnptxfsiz));
+
+                       /**@todo NGS: Fix Periodic FIFO Sizing! */
+                       /*
+                        * Periodic Tx FIFOs These FIFOs are numbered from 1 to 15.
+                        * Indexes of the FIFO size module parameters in the
+                        * dev_perio_tx_fifo_size array and the FIFO size registers in
+                        * the dptxfsiz array run from 0 to 14.
+                        */
+                       /** @todo Finish debug of this */
+                       ptxfifosize.b.startaddr =
+                           nptxfifosize.b.startaddr + nptxfifosize.b.depth;
+                       for (i = 0; i < core_if->hwcfg4.b.num_dev_perio_in_ep; i++) {
+                               ptxfifosize.b.depth =
+                                   params->dev_perio_tx_fifo_size[i];
+                               DWC_DEBUGPL(DBG_CIL,
+                                           "initial dtxfsiz[%d]=%08x\n", i,
+                                           DWC_READ_REG32(&global_regs->dtxfsiz
+                                                          [i]));
+                               DWC_WRITE_REG32(&global_regs->dtxfsiz[i],
+                                               ptxfifosize.d32);
+                               DWC_DEBUGPL(DBG_CIL, "new dtxfsiz[%d]=%08x\n",
+                                           i,
+                                           DWC_READ_REG32(&global_regs->dtxfsiz
+                                                          [i]));
+                               ptxfifosize.b.startaddr += ptxfifosize.b.depth;
+                       }
+               } else {
+                       /*
+                        * Tx FIFOs These FIFOs are numbered from 1 to 15.
+                        * Indexes of the FIFO size module parameters in the
+                        * dev_tx_fifo_size array and the FIFO size registers in
+                        * the dtxfsiz array run from 0 to 14.
+                        */
+
+                       /* Non-periodic Tx FIFO */
+                       DWC_DEBUGPL(DBG_CIL, "initial gnptxfsiz=%08x\n",
+                                   DWC_READ_REG32(&global_regs->gnptxfsiz));
+
+#ifdef DWC_UTE_CFI
+                       core_if->pwron_gnptxfsiz =
+                           (DWC_READ_REG32(&global_regs->gnptxfsiz) >> 16);
+                       core_if->init_gnptxfsiz =
+                           params->dev_nperio_tx_fifo_size;
+#endif
+                       nptxfifosize.b.depth = params->dev_nperio_tx_fifo_size;
+                       nptxfifosize.b.startaddr = params->dev_rx_fifo_size;
+
+                       DWC_WRITE_REG32(&global_regs->gnptxfsiz,
+                                       nptxfifosize.d32);
+
+                       DWC_DEBUGPL(DBG_CIL, "new gnptxfsiz=%08x\n",
+                                   DWC_READ_REG32(&global_regs->gnptxfsiz));
+
+                       txfifosize.b.startaddr =
+                           nptxfifosize.b.startaddr + nptxfifosize.b.depth;
+
+                       for (i = 0; i < core_if->hwcfg4.b.num_in_eps; i++) {
+
+                               txfifosize.b.depth =
+                                   params->dev_tx_fifo_size[i];
+
+                               DWC_DEBUGPL(DBG_CIL,
+                                           "initial dtxfsiz[%d]=%08x\n",
+                                           i,
+                                           DWC_READ_REG32(&global_regs->dtxfsiz
+                                                          [i]));
+
+#ifdef DWC_UTE_CFI
+                               core_if->pwron_txfsiz[i] =
+                                   (DWC_READ_REG32
+                                    (&global_regs->dtxfsiz[i]) >> 16);
+                               core_if->init_txfsiz[i] =
+                                   params->dev_tx_fifo_size[i];
+#endif
+                               DWC_WRITE_REG32(&global_regs->dtxfsiz[i],
+                                               txfifosize.d32);
+
+                               DWC_DEBUGPL(DBG_CIL,
+                                           "new dtxfsiz[%d]=%08x\n",
+                                           i,
+                                           DWC_READ_REG32(&global_regs->dtxfsiz
+                                                          [i]));
+
+                               txfifosize.b.startaddr += txfifosize.b.depth;
+                       }
+                       if (core_if->snpsid <= OTG_CORE_REV_2_94a) {
+                               /* Calculating DFIFOCFG for Device mode to include RxFIFO and NPTXFIFO */
+                               gdfifocfg.d32 = DWC_READ_REG32(&global_regs->gdfifocfg);
+                               hwcfg3.d32 = DWC_READ_REG32(&global_regs->ghwcfg3);
+                               gdfifocfg.b.gdfifocfg = (DWC_READ_REG32(&global_regs->ghwcfg3) >> 16);
+                               DWC_WRITE_REG32(&global_regs->gdfifocfg, gdfifocfg.d32);
+                               rxfsiz = (DWC_READ_REG32(&global_regs->grxfsiz) & 0x0000ffff);
+                               nptxfsiz = (DWC_READ_REG32(&global_regs->gnptxfsiz) >> 16);
+                               gdfifocfg.b.epinfobase = rxfsiz + nptxfsiz;
+                               DWC_WRITE_REG32(&global_regs->gdfifocfg, gdfifocfg.d32);
+                       }
+               }
+
+               /* Flush the FIFOs */
+               dwc_otg_flush_tx_fifo(core_if, 0x10);   /* all Tx FIFOs */
+               dwc_otg_flush_rx_fifo(core_if);
+
+               /* Flush the Learning Queue. */
+               resetctl.b.intknqflsh = 1;
+               DWC_WRITE_REG32(&core_if->core_global_regs->grstctl, resetctl.d32);
+
+               if (!core_if->core_params->en_multiple_tx_fifo && core_if->dma_enable) {
+                       core_if->start_predict = 0;
+                       for (i = 0; i<= core_if->dev_if->num_in_eps; ++i) {
+                               core_if->nextep_seq[i] = 0xff;  // 0xff - EP not active
+                       }
+                       core_if->nextep_seq[0] = 0;
+                       core_if->first_in_nextep_seq = 0;
+                       diepctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[0]->diepctl);
+                       diepctl.b.nextep = 0;
+                       DWC_WRITE_REG32(&dev_if->in_ep_regs[0]->diepctl, diepctl.d32);
+
+                       /* Update IN Endpoint Mismatch Count by active IN NP EP count + 1 */
+                       dcfg.d32 = DWC_READ_REG32(&dev_if->dev_global_regs->dcfg);
+                       dcfg.b.epmscnt = 2;
+                       DWC_WRITE_REG32(&dev_if->dev_global_regs->dcfg, dcfg.d32);
+
+                       DWC_DEBUGPL(DBG_CILV,"%s first_in_nextep_seq= %2d; nextep_seq[]:\n",
+                               __func__, core_if->first_in_nextep_seq);
+                       for (i=0; i <= core_if->dev_if->num_in_eps; i++) {
+                               DWC_DEBUGPL(DBG_CILV, "%2d ", core_if->nextep_seq[i]);
+                       }
+                       DWC_DEBUGPL(DBG_CILV,"\n");
+               }
+
+               /* Clear all pending Device Interrupts */
+               /** @todo - if the condition needed to be checked
+                *  or in any case all pending interrutps should be cleared?
+            */
+               if (core_if->multiproc_int_enable) {
+                       for (i = 0; i < core_if->dev_if->num_in_eps; ++i) {
+                               DWC_WRITE_REG32(&dev_if->
+                                               dev_global_regs->diepeachintmsk[i], 0);
+                       }
+               }
+
+               for (i = 0; i < core_if->dev_if->num_out_eps; ++i) {
+                       DWC_WRITE_REG32(&dev_if->
+                                       dev_global_regs->doepeachintmsk[i], 0);
+               }
+
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->deachint, 0xFFFFFFFF);
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->deachintmsk, 0);
+       } else {
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->diepmsk, 0);
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->doepmsk, 0);
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->daint, 0xFFFFFFFF);
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->daintmsk, 0);
+       }
+
+       for (i = 0; i <= dev_if->num_in_eps; i++) {
+               depctl_data_t depctl;
+               depctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepctl);
+               if (depctl.b.epena) {
+                       depctl.d32 = 0;
+                       depctl.b.epdis = 1;
+                       depctl.b.snak = 1;
+               } else {
+                       depctl.d32 = 0;
+               }
+
+               DWC_WRITE_REG32(&dev_if->in_ep_regs[i]->diepctl, depctl.d32);
+
+               DWC_WRITE_REG32(&dev_if->in_ep_regs[i]->dieptsiz, 0);
+               DWC_WRITE_REG32(&dev_if->in_ep_regs[i]->diepdma, 0);
+               DWC_WRITE_REG32(&dev_if->in_ep_regs[i]->diepint, 0xFF);
+       }
+
+       for (i = 0; i <= dev_if->num_out_eps; i++) {
+               depctl_data_t depctl;
+               depctl.d32 = DWC_READ_REG32(&dev_if->out_ep_regs[i]->doepctl);
+               if (depctl.b.epena) {
+                       dctl_data_t dctl = {.d32 = 0 };
+                       gintmsk_data_t gintsts = {.d32 = 0 };
+                       doepint_data_t doepint = {.d32 = 0 };
+                       dctl.b.sgoutnak = 1;
+                       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, 0, dctl.d32);
+                       do {
+                               dwc_udelay(10);
+                               gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+                       } while (!gintsts.b.goutnakeff);
+                       gintsts.d32 = 0;
+                       gintsts.b.goutnakeff = 1;
+                       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+                       depctl.d32 = 0;
+                       depctl.b.epdis = 1;
+                       depctl.b.snak = 1;
+                       DWC_WRITE_REG32(&core_if->dev_if->out_ep_regs[i]->doepctl, depctl.d32);
+                       do {
+                               dwc_udelay(10);
+                               doepint.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                       out_ep_regs[i]->doepint);
+                       } while (!doepint.b.epdisabled);
+
+                       doepint.b.epdisabled = 1;
+                       DWC_WRITE_REG32(&core_if->dev_if->out_ep_regs[i]->doepint, doepint.d32);
+
+                       dctl.d32 = 0;
+                       dctl.b.cgoutnak = 1;
+                       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, 0, dctl.d32);
+               } else {
+                       depctl.d32 = 0;
+               }
+
+               DWC_WRITE_REG32(&dev_if->out_ep_regs[i]->doepctl, depctl.d32);
+
+               DWC_WRITE_REG32(&dev_if->out_ep_regs[i]->doeptsiz, 0);
+               DWC_WRITE_REG32(&dev_if->out_ep_regs[i]->doepdma, 0);
+               DWC_WRITE_REG32(&dev_if->out_ep_regs[i]->doepint, 0xFF);
+       }
+
+       if (core_if->en_multiple_tx_fifo && core_if->dma_enable) {
+               dev_if->non_iso_tx_thr_en = params->thr_ctl & 0x1;
+               dev_if->iso_tx_thr_en = (params->thr_ctl >> 1) & 0x1;
+               dev_if->rx_thr_en = (params->thr_ctl >> 2) & 0x1;
+
+               dev_if->rx_thr_length = params->rx_thr_length;
+               dev_if->tx_thr_length = params->tx_thr_length;
+
+               dev_if->setup_desc_index = 0;
+
+               dthrctl.d32 = 0;
+               dthrctl.b.non_iso_thr_en = dev_if->non_iso_tx_thr_en;
+               dthrctl.b.iso_thr_en = dev_if->iso_tx_thr_en;
+               dthrctl.b.tx_thr_len = dev_if->tx_thr_length;
+               dthrctl.b.rx_thr_en = dev_if->rx_thr_en;
+               dthrctl.b.rx_thr_len = dev_if->rx_thr_length;
+               dthrctl.b.ahb_thr_ratio = params->ahb_thr_ratio;
+
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->dtknqr3_dthrctl,
+                               dthrctl.d32);
+
+               DWC_DEBUGPL(DBG_CIL,
+                           "Non ISO Tx Thr - %d\nISO Tx Thr - %d\nRx Thr - %d\nTx Thr Len - %d\nRx Thr Len - %d\n",
+                           dthrctl.b.non_iso_thr_en, dthrctl.b.iso_thr_en,
+                           dthrctl.b.rx_thr_en, dthrctl.b.tx_thr_len,
+                           dthrctl.b.rx_thr_len);
+
+       }
+
+       dwc_otg_enable_device_interrupts(core_if);
+
+       {
+               diepmsk_data_t msk = {.d32 = 0 };
+               msk.b.txfifoundrn = 1;
+               if (core_if->multiproc_int_enable) {
+                       DWC_MODIFY_REG32(&dev_if->dev_global_regs->
+                                        diepeachintmsk[0], msk.d32, msk.d32);
+               } else {
+                       DWC_MODIFY_REG32(&dev_if->dev_global_regs->diepmsk,
+                                        msk.d32, msk.d32);
+               }
+       }
+
+       if (core_if->multiproc_int_enable) {
+               /* Set NAK on Babble */
+               dctl_data_t dctl = {.d32 = 0 };
+               dctl.b.nakonbble = 1;
+               DWC_MODIFY_REG32(&dev_if->dev_global_regs->dctl, 0, dctl.d32);
+       }
+
+       if (core_if->snpsid >= OTG_CORE_REV_2_94a) {
+               dctl_data_t dctl = {.d32 = 0 };
+               dctl.d32 = DWC_READ_REG32(&dev_if->dev_global_regs->dctl);
+               dctl.b.sftdiscon = 0;
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->dctl, dctl.d32);
+       }
+}
+
+/**
+ * This function enables the Host mode interrupts.
+ *
+ * @param core_if Programming view of DWC_otg controller
+ */
+void dwc_otg_enable_host_interrupts(dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_DEBUGPL(DBG_CIL, "%s(%p)\n", __func__, core_if);
+
+       /* Disable all interrupts. */
+       DWC_WRITE_REG32(&global_regs->gintmsk, 0);
+
+       /* Clear any pending interrupts. */
+       DWC_WRITE_REG32(&global_regs->gintsts, 0xFFFFFFFF);
+
+       /* Enable the common interrupts */
+       dwc_otg_enable_common_interrupts(core_if);
+
+       /*
+        * Enable host mode interrupts without disturbing common
+        * interrupts.
+        */
+
+       intr_mask.b.disconnect = 1;
+       intr_mask.b.portintr = 1;
+       intr_mask.b.hcintr = 1;
+
+       DWC_MODIFY_REG32(&global_regs->gintmsk, intr_mask.d32, intr_mask.d32);
+}
+
+/**
+ * This function disables the Host Mode interrupts.
+ *
+ * @param core_if Programming view of DWC_otg controller
+ */
+void dwc_otg_disable_host_interrupts(dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_DEBUGPL(DBG_CILV, "%s()\n", __func__);
+
+       /*
+        * Disable host mode interrupts without disturbing common
+        * interrupts.
+        */
+       intr_mask.b.sofintr = 1;
+       intr_mask.b.portintr = 1;
+       intr_mask.b.hcintr = 1;
+       intr_mask.b.ptxfempty = 1;
+       intr_mask.b.nptxfempty = 1;
+
+       DWC_MODIFY_REG32(&global_regs->gintmsk, intr_mask.d32, 0);
+}
+
+/**
+ * This function initializes the DWC_otg controller registers for
+ * host mode.
+ *
+ * This function flushes the Tx and Rx FIFOs and it flushes any entries in the
+ * request queues. Host channels are reset to ensure that they are ready for
+ * performing transfers.
+ *
+ * @param core_if Programming view of DWC_otg controller
+ *
+ */
+void dwc_otg_core_host_init(dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       dwc_otg_host_if_t *host_if = core_if->host_if;
+       dwc_otg_core_params_t *params = core_if->core_params;
+       hprt0_data_t hprt0 = {.d32 = 0 };
+       fifosize_data_t nptxfifosize;
+       fifosize_data_t ptxfifosize;
+       uint16_t rxfsiz, nptxfsiz, hptxfsiz;
+       gdfifocfg_data_t gdfifocfg = {.d32 = 0 };
+       int i;
+       hcchar_data_t hcchar;
+       hcfg_data_t hcfg;
+       hfir_data_t hfir;
+       dwc_otg_hc_regs_t *hc_regs;
+       int num_channels;
+       gotgctl_data_t gotgctl = {.d32 = 0 };
+
+       DWC_DEBUGPL(DBG_CILV, "%s(%p)\n", __func__, core_if);
+
+       /* Restart the Phy Clock */
+       DWC_WRITE_REG32(core_if->pcgcctl, 0);
+
+       /* Initialize Host Configuration Register */
+       init_fslspclksel(core_if);
+       if (core_if->core_params->speed == DWC_SPEED_PARAM_FULL) {
+               hcfg.d32 = DWC_READ_REG32(&host_if->host_global_regs->hcfg);
+               hcfg.b.fslssupp = 1;
+               DWC_WRITE_REG32(&host_if->host_global_regs->hcfg, hcfg.d32);
+
+       }
+
+       /* This bit allows dynamic reloading of the HFIR register
+        * during runtime. This bit needs to be programmed during
+        * initial configuration and its value must not be changed
+        * during runtime.*/
+       if (core_if->core_params->reload_ctl == 1) {
+               hfir.d32 = DWC_READ_REG32(&host_if->host_global_regs->hfir);
+               hfir.b.hfirrldctrl = 1;
+               DWC_WRITE_REG32(&host_if->host_global_regs->hfir, hfir.d32);
+       }
+
+       if (core_if->core_params->dma_desc_enable) {
+               uint8_t op_mode = core_if->hwcfg2.b.op_mode;
+               if (!
+                   (core_if->hwcfg4.b.desc_dma
+                    && (core_if->snpsid >= OTG_CORE_REV_2_90a)
+                    && ((op_mode == DWC_HWCFG2_OP_MODE_HNP_SRP_CAPABLE_OTG)
+                        || (op_mode == DWC_HWCFG2_OP_MODE_SRP_ONLY_CAPABLE_OTG)
+                        || (op_mode ==
+                            DWC_HWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE_OTG)
+                        || (op_mode == DWC_HWCFG2_OP_MODE_SRP_CAPABLE_HOST)
+                        || (op_mode ==
+                            DWC_HWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST)))) {
+
+                       DWC_ERROR("Host can't operate in Descriptor DMA mode.\n"
+                                 "Either core version is below 2.90a or "
+                                 "GHWCFG2, GHWCFG4 registers' values do not allow Descriptor DMA in host mode.\n"
+                                 "To run the driver in Buffer DMA host mode set dma_desc_enable "
+                                 "module parameter to 0.\n");
+                       return;
+               }
+               hcfg.d32 = DWC_READ_REG32(&host_if->host_global_regs->hcfg);
+               hcfg.b.descdma = 1;
+               DWC_WRITE_REG32(&host_if->host_global_regs->hcfg, hcfg.d32);
+       }
+
+       /* Configure data FIFO sizes */
+       if (core_if->hwcfg2.b.dynamic_fifo && params->enable_dynamic_fifo) {
+               DWC_DEBUGPL(DBG_CIL, "Total FIFO Size=%d\n",
+                           core_if->total_fifo_size);
+               DWC_DEBUGPL(DBG_CIL, "Rx FIFO Size=%d\n",
+                           params->host_rx_fifo_size);
+               DWC_DEBUGPL(DBG_CIL, "NP Tx FIFO Size=%d\n",
+                           params->host_nperio_tx_fifo_size);
+               DWC_DEBUGPL(DBG_CIL, "P Tx FIFO Size=%d\n",
+                           params->host_perio_tx_fifo_size);
+
+               /* Rx FIFO */
+               DWC_DEBUGPL(DBG_CIL, "initial grxfsiz=%08x\n",
+                           DWC_READ_REG32(&global_regs->grxfsiz));
+               DWC_WRITE_REG32(&global_regs->grxfsiz,
+                               params->host_rx_fifo_size);
+               DWC_DEBUGPL(DBG_CIL, "new grxfsiz=%08x\n",
+                           DWC_READ_REG32(&global_regs->grxfsiz));
+
+               /* Non-periodic Tx FIFO */
+               DWC_DEBUGPL(DBG_CIL, "initial gnptxfsiz=%08x\n",
+                           DWC_READ_REG32(&global_regs->gnptxfsiz));
+               nptxfifosize.b.depth = params->host_nperio_tx_fifo_size;
+               nptxfifosize.b.startaddr = params->host_rx_fifo_size;
+               DWC_WRITE_REG32(&global_regs->gnptxfsiz, nptxfifosize.d32);
+               DWC_DEBUGPL(DBG_CIL, "new gnptxfsiz=%08x\n",
+                           DWC_READ_REG32(&global_regs->gnptxfsiz));
+
+               /* Periodic Tx FIFO */
+               DWC_DEBUGPL(DBG_CIL, "initial hptxfsiz=%08x\n",
+                           DWC_READ_REG32(&global_regs->hptxfsiz));
+               ptxfifosize.b.depth = params->host_perio_tx_fifo_size;
+               ptxfifosize.b.startaddr =
+                   nptxfifosize.b.startaddr + nptxfifosize.b.depth;
+               DWC_WRITE_REG32(&global_regs->hptxfsiz, ptxfifosize.d32);
+               DWC_DEBUGPL(DBG_CIL, "new hptxfsiz=%08x\n",
+                           DWC_READ_REG32(&global_regs->hptxfsiz));
+
+               if (core_if->en_multiple_tx_fifo
+                   && core_if->snpsid <= OTG_CORE_REV_2_94a) {
+                       /* Global DFIFOCFG calculation for Host mode - include RxFIFO, NPTXFIFO and HPTXFIFO */
+                       gdfifocfg.d32 = DWC_READ_REG32(&global_regs->gdfifocfg);
+                       rxfsiz = (DWC_READ_REG32(&global_regs->grxfsiz) & 0x0000ffff);
+                       nptxfsiz = (DWC_READ_REG32(&global_regs->gnptxfsiz) >> 16);
+                       hptxfsiz = (DWC_READ_REG32(&global_regs->hptxfsiz) >> 16);
+                       gdfifocfg.b.epinfobase = rxfsiz + nptxfsiz + hptxfsiz;
+                       DWC_WRITE_REG32(&global_regs->gdfifocfg, gdfifocfg.d32);
+               }
+       }
+
+       /* TODO - check this */
+       /* Clear Host Set HNP Enable in the OTG Control Register */
+       gotgctl.b.hstsethnpen = 1;
+       DWC_MODIFY_REG32(&global_regs->gotgctl, gotgctl.d32, 0);
+       /* Make sure the FIFOs are flushed. */
+       dwc_otg_flush_tx_fifo(core_if, 0x10 /* all TX FIFOs */ );
+       dwc_otg_flush_rx_fifo(core_if);
+
+       /* Clear Host Set HNP Enable in the OTG Control Register */
+       gotgctl.b.hstsethnpen = 1;
+       DWC_MODIFY_REG32(&global_regs->gotgctl, gotgctl.d32, 0);
+
+       if (!core_if->core_params->dma_desc_enable) {
+               /* Flush out any leftover queued requests. */
+               num_channels = core_if->core_params->host_channels;
+
+               for (i = 0; i < num_channels; i++) {
+                       hc_regs = core_if->host_if->hc_regs[i];
+                       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+                       hcchar.b.chen = 0;
+                       hcchar.b.chdis = 1;
+                       hcchar.b.epdir = 0;
+                       DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+               }
+
+               /* Halt all channels to put them into a known state. */
+               for (i = 0; i < num_channels; i++) {
+                       int count = 0;
+                       hc_regs = core_if->host_if->hc_regs[i];
+                       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+                       hcchar.b.chen = 1;
+                       hcchar.b.chdis = 1;
+                       hcchar.b.epdir = 0;
+                       DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+                       DWC_DEBUGPL(DBG_HCDV, "%s: Halt channel %d regs %p\n", __func__, i, hc_regs);
+                       do {
+                               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+                               if (++count > 1000) {
+                                       DWC_ERROR
+                                           ("%s: Unable to clear halt on channel %d (timeout HCCHAR 0x%X @%p)\n",
+                                            __func__, i, hcchar.d32, &hc_regs->hcchar);
+                                       break;
+                               }
+                               dwc_udelay(1);
+                       } while (hcchar.b.chen);
+               }
+       }
+
+       /* Turn on the vbus power. */
+       DWC_PRINTF("Init: Port Power? op_state=%d\n", core_if->op_state);
+       if (core_if->op_state == A_HOST) {
+               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+               DWC_PRINTF("Init: Power Port (%d)\n", hprt0.b.prtpwr);
+               if (hprt0.b.prtpwr == 0) {
+                       hprt0.b.prtpwr = 1;
+                       DWC_WRITE_REG32(host_if->hprt0, hprt0.d32);
+               }
+       }
+
+       dwc_otg_enable_host_interrupts(core_if);
+}
+
+/**
+ * Prepares a host channel for transferring packets to/from a specific
+ * endpoint. The HCCHARn register is set up with the characteristics specified
+ * in _hc. Host channel interrupts that may need to be serviced while this
+ * transfer is in progress are enabled.
+ *
+ * @param core_if Programming view of DWC_otg controller
+ * @param hc Information needed to initialize the host channel
+ */
+void dwc_otg_hc_init(dwc_otg_core_if_t * core_if, dwc_hc_t * hc)
+{
+       hcintmsk_data_t hc_intr_mask;
+       hcchar_data_t hcchar;
+       hcsplt_data_t hcsplt;
+
+       uint8_t hc_num = hc->hc_num;
+       dwc_otg_host_if_t *host_if = core_if->host_if;
+       dwc_otg_hc_regs_t *hc_regs = host_if->hc_regs[hc_num];
+
+       /* Clear old interrupt conditions for this host channel. */
+       hc_intr_mask.d32 = 0xFFFFFFFF;
+       hc_intr_mask.b.reserved14_31 = 0;
+       DWC_WRITE_REG32(&hc_regs->hcint, hc_intr_mask.d32);
+
+       /* Enable channel interrupts required for this transfer. */
+       hc_intr_mask.d32 = 0;
+       hc_intr_mask.b.chhltd = 1;
+       if (core_if->dma_enable) {
+               /* For Descriptor DMA mode core halts the channel on AHB error. Interrupt is not required */
+               if (!core_if->dma_desc_enable)
+                       hc_intr_mask.b.ahberr = 1;
+               else {
+                       if (hc->ep_type == DWC_OTG_EP_TYPE_ISOC)
+                               hc_intr_mask.b.xfercompl = 1;
+               }
+
+               if (hc->error_state && !hc->do_split &&
+                   hc->ep_type != DWC_OTG_EP_TYPE_ISOC) {
+                       hc_intr_mask.b.ack = 1;
+                       if (hc->ep_is_in) {
+                               hc_intr_mask.b.datatglerr = 1;
+                               if (hc->ep_type != DWC_OTG_EP_TYPE_INTR) {
+                                       hc_intr_mask.b.nak = 1;
+                               }
+                       }
+               }
+       } else {
+               switch (hc->ep_type) {
+               case DWC_OTG_EP_TYPE_CONTROL:
+               case DWC_OTG_EP_TYPE_BULK:
+                       hc_intr_mask.b.xfercompl = 1;
+                       hc_intr_mask.b.stall = 1;
+                       hc_intr_mask.b.xacterr = 1;
+                       hc_intr_mask.b.datatglerr = 1;
+                       if (hc->ep_is_in) {
+                               hc_intr_mask.b.bblerr = 1;
+                       } else {
+                               hc_intr_mask.b.nak = 1;
+                               hc_intr_mask.b.nyet = 1;
+                               if (hc->do_ping) {
+                                       hc_intr_mask.b.ack = 1;
+                               }
+                       }
+
+                       if (hc->do_split) {
+                               hc_intr_mask.b.nak = 1;
+                               if (hc->complete_split) {
+                                       hc_intr_mask.b.nyet = 1;
+                               } else {
+                                       hc_intr_mask.b.ack = 1;
+                               }
+                       }
+
+                       if (hc->error_state) {
+                               hc_intr_mask.b.ack = 1;
+                       }
+                       break;
+               case DWC_OTG_EP_TYPE_INTR:
+                       hc_intr_mask.b.xfercompl = 1;
+                       hc_intr_mask.b.nak = 1;
+                       hc_intr_mask.b.stall = 1;
+                       hc_intr_mask.b.xacterr = 1;
+                       hc_intr_mask.b.datatglerr = 1;
+                       hc_intr_mask.b.frmovrun = 1;
+
+                       if (hc->ep_is_in) {
+                               hc_intr_mask.b.bblerr = 1;
+                       }
+                       if (hc->error_state) {
+                               hc_intr_mask.b.ack = 1;
+                       }
+                       if (hc->do_split) {
+                               if (hc->complete_split) {
+                                       hc_intr_mask.b.nyet = 1;
+                               } else {
+                                       hc_intr_mask.b.ack = 1;
+                               }
+                       }
+                       break;
+               case DWC_OTG_EP_TYPE_ISOC:
+                       hc_intr_mask.b.xfercompl = 1;
+                       hc_intr_mask.b.frmovrun = 1;
+                       hc_intr_mask.b.ack = 1;
+
+                       if (hc->ep_is_in) {
+                               hc_intr_mask.b.xacterr = 1;
+                               hc_intr_mask.b.bblerr = 1;
+                       }
+                       break;
+               }
+       }
+       DWC_WRITE_REG32(&hc_regs->hcintmsk, hc_intr_mask.d32);
+
+       /*
+        * Program the HCCHARn register with the endpoint characteristics for
+        * the current transfer.
+        */
+       hcchar.d32 = 0;
+       hcchar.b.devaddr = hc->dev_addr;
+       hcchar.b.epnum = hc->ep_num;
+       hcchar.b.epdir = hc->ep_is_in;
+       hcchar.b.lspddev = (hc->speed == DWC_OTG_EP_SPEED_LOW);
+       hcchar.b.eptype = hc->ep_type;
+       hcchar.b.mps = hc->max_packet;
+
+       DWC_WRITE_REG32(&host_if->hc_regs[hc_num]->hcchar, hcchar.d32);
+
+       DWC_DEBUGPL(DBG_HCDV, "%s: Channel %d, Dev Addr %d, EP #%d\n",
+                    __func__, hc->hc_num, hcchar.b.devaddr, hcchar.b.epnum);
+       DWC_DEBUGPL(DBG_HCDV, "  Is In %d, Is Low Speed %d, EP Type %d, "
+                                "Max Pkt %d, Multi Cnt %d\n",
+                    hcchar.b.epdir, hcchar.b.lspddev, hcchar.b.eptype,
+                    hcchar.b.mps, hcchar.b.multicnt);
+
+       /*
+        * Program the HCSPLIT register for SPLITs
+        */
+       hcsplt.d32 = 0;
+       if (hc->do_split) {
+               DWC_DEBUGPL(DBG_HCDV, "Programming HC %d with split --> %s\n",
+                           hc->hc_num,
+                           hc->complete_split ? "CSPLIT" : "SSPLIT");
+               hcsplt.b.compsplt = hc->complete_split;
+               hcsplt.b.xactpos = hc->xact_pos;
+               hcsplt.b.hubaddr = hc->hub_addr;
+               hcsplt.b.prtaddr = hc->port_addr;
+               DWC_DEBUGPL(DBG_HCDV, "\t  comp split %d\n", hc->complete_split);
+               DWC_DEBUGPL(DBG_HCDV, "\t  xact pos %d\n", hc->xact_pos);
+               DWC_DEBUGPL(DBG_HCDV, "\t  hub addr %d\n", hc->hub_addr);
+               DWC_DEBUGPL(DBG_HCDV, "\t  port addr %d\n", hc->port_addr);
+               DWC_DEBUGPL(DBG_HCDV, "\t  is_in %d\n", hc->ep_is_in);
+               DWC_DEBUGPL(DBG_HCDV, "\t  Max Pkt: %d\n", hcchar.b.mps);
+               DWC_DEBUGPL(DBG_HCDV, "\t  xferlen: %d\n", hc->xfer_len);
+       }
+       DWC_WRITE_REG32(&host_if->hc_regs[hc_num]->hcsplt, hcsplt.d32);
+
+}
+
+/**
+ * Attempts to halt a host channel. This function should only be called in
+ * Slave mode or to abort a transfer in either Slave mode or DMA mode. Under
+ * normal circumstances in DMA mode, the controller halts the channel when the
+ * transfer is complete or a condition occurs that requires application
+ * intervention.
+ *
+ * In slave mode, checks for a free request queue entry, then sets the Channel
+ * Enable and Channel Disable bits of the Host Channel Characteristics
+ * register of the specified channel to intiate the halt. If there is no free
+ * request queue entry, sets only the Channel Disable bit of the HCCHARn
+ * register to flush requests for this channel. In the latter case, sets a
+ * flag to indicate that the host channel needs to be halted when a request
+ * queue slot is open.
+ *
+ * In DMA mode, always sets the Channel Enable and Channel Disable bits of the
+ * HCCHARn register. The controller ensures there is space in the request
+ * queue before submitting the halt request.
+ *
+ * Some time may elapse before the core flushes any posted requests for this
+ * host channel and halts. The Channel Halted interrupt handler completes the
+ * deactivation of the host channel.
+ *
+ * @param core_if Controller register interface.
+ * @param hc Host channel to halt.
+ * @param halt_status Reason for halting the channel.
+ */
+void dwc_otg_hc_halt(dwc_otg_core_if_t * core_if,
+                    dwc_hc_t * hc, dwc_otg_halt_status_e halt_status)
+{
+       gnptxsts_data_t nptxsts;
+       hptxsts_data_t hptxsts;
+       hcchar_data_t hcchar;
+       dwc_otg_hc_regs_t *hc_regs;
+       dwc_otg_core_global_regs_t *global_regs;
+       dwc_otg_host_global_regs_t *host_global_regs;
+
+       hc_regs = core_if->host_if->hc_regs[hc->hc_num];
+       global_regs = core_if->core_global_regs;
+       host_global_regs = core_if->host_if->host_global_regs;
+
+       DWC_ASSERT(!(halt_status == DWC_OTG_HC_XFER_NO_HALT_STATUS),
+                  "halt_status = %d\n", halt_status);
+
+       if (halt_status == DWC_OTG_HC_XFER_URB_DEQUEUE ||
+           halt_status == DWC_OTG_HC_XFER_AHB_ERR) {
+               /*
+                * Disable all channel interrupts except Ch Halted. The QTD
+                * and QH state associated with this transfer has been cleared
+                * (in the case of URB_DEQUEUE), so the channel needs to be
+                * shut down carefully to prevent crashes.
+                */
+               hcintmsk_data_t hcintmsk;
+               hcintmsk.d32 = 0;
+               hcintmsk.b.chhltd = 1;
+               DWC_WRITE_REG32(&hc_regs->hcintmsk, hcintmsk.d32);
+
+               /*
+                * Make sure no other interrupts besides halt are currently
+                * pending. Handling another interrupt could cause a crash due
+                * to the QTD and QH state.
+                */
+               DWC_WRITE_REG32(&hc_regs->hcint, ~hcintmsk.d32);
+
+               /*
+                * Make sure the halt status is set to URB_DEQUEUE or AHB_ERR
+                * even if the channel was already halted for some other
+                * reason.
+                */
+               hc->halt_status = halt_status;
+
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+               if (hcchar.b.chen == 0) {
+                       /*
+                        * The channel is either already halted or it hasn't
+                        * started yet. In DMA mode, the transfer may halt if
+                        * it finishes normally or a condition occurs that
+                        * requires driver intervention. Don't want to halt
+                        * the channel again. In either Slave or DMA mode,
+                        * it's possible that the transfer has been assigned
+                        * to a channel, but not started yet when an URB is
+                        * dequeued. Don't want to halt a channel that hasn't
+                        * started yet.
+                        */
+                       return;
+               }
+       }
+       if (hc->halt_pending) {
+               /*
+                * A halt has already been issued for this channel. This might
+                * happen when a transfer is aborted by a higher level in
+                * the stack.
+                */
+#ifdef DEBUG
+               DWC_PRINTF
+                   ("*** %s: Channel %d, _hc->halt_pending already set ***\n",
+                    __func__, hc->hc_num);
+
+#endif
+               return;
+       }
+
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+       /* No need to set the bit in DDMA for disabling the channel */
+       //TODO check it everywhere channel is disabled
+       if (!core_if->core_params->dma_desc_enable)
+               hcchar.b.chen = 1;
+       hcchar.b.chdis = 1;
+
+       if (!core_if->dma_enable) {
+               /* Check for space in the request queue to issue the halt. */
+               if (hc->ep_type == DWC_OTG_EP_TYPE_CONTROL ||
+                   hc->ep_type == DWC_OTG_EP_TYPE_BULK) {
+                       nptxsts.d32 = DWC_READ_REG32(&global_regs->gnptxsts);
+                       if (nptxsts.b.nptxqspcavail == 0) {
+                               hcchar.b.chen = 0;
+                       }
+               } else {
+                       hptxsts.d32 =
+                           DWC_READ_REG32(&host_global_regs->hptxsts);
+                       if ((hptxsts.b.ptxqspcavail == 0)
+                           || (core_if->queuing_high_bandwidth)) {
+                               hcchar.b.chen = 0;
+                       }
+               }
+       }
+       DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+
+       hc->halt_status = halt_status;
+
+       if (hcchar.b.chen) {
+               hc->halt_pending = 1;
+               hc->halt_on_queue = 0;
+       } else {
+               hc->halt_on_queue = 1;
+       }
+
+       DWC_DEBUGPL(DBG_HCDV, "%s: Channel %d\n", __func__, hc->hc_num);
+       DWC_DEBUGPL(DBG_HCDV, "  hcchar: 0x%08x\n", hcchar.d32);
+       DWC_DEBUGPL(DBG_HCDV, "  halt_pending: %d\n", hc->halt_pending);
+       DWC_DEBUGPL(DBG_HCDV, "  halt_on_queue: %d\n", hc->halt_on_queue);
+       DWC_DEBUGPL(DBG_HCDV, "  halt_status: %d\n", hc->halt_status);
+
+       return;
+}
+
+/**
+ * Clears the transfer state for a host channel. This function is normally
+ * called after a transfer is done and the host channel is being released.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param hc Identifies the host channel to clean up.
+ */
+void dwc_otg_hc_cleanup(dwc_otg_core_if_t * core_if, dwc_hc_t * hc)
+{
+       dwc_otg_hc_regs_t *hc_regs;
+
+       hc->xfer_started = 0;
+
+       /*
+        * Clear channel interrupt enables and any unhandled channel interrupt
+        * conditions.
+        */
+       hc_regs = core_if->host_if->hc_regs[hc->hc_num];
+       DWC_WRITE_REG32(&hc_regs->hcintmsk, 0);
+       DWC_WRITE_REG32(&hc_regs->hcint, 0xFFFFFFFF);
+#ifdef DEBUG
+       DWC_TIMER_CANCEL(core_if->hc_xfer_timer[hc->hc_num]);
+#endif
+}
+
+/**
+ * Sets the channel property that indicates in which frame a periodic transfer
+ * should occur. This is always set to the _next_ frame. This function has no
+ * effect on non-periodic transfers.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param hc Identifies the host channel to set up and its properties.
+ * @param hcchar Current value of the HCCHAR register for the specified host
+ * channel.
+ */
+static inline void hc_set_even_odd_frame(dwc_otg_core_if_t * core_if,
+                                        dwc_hc_t * hc, hcchar_data_t * hcchar)
+{
+       if (hc->ep_type == DWC_OTG_EP_TYPE_INTR ||
+           hc->ep_type == DWC_OTG_EP_TYPE_ISOC) {
+               hfnum_data_t hfnum;
+               hfnum.d32 =
+                   DWC_READ_REG32(&core_if->host_if->host_global_regs->hfnum);
+
+               /* 1 if _next_ frame is odd, 0 if it's even */
+               hcchar->b.oddfrm = (hfnum.b.frnum & 0x1) ? 0 : 1;
+#ifdef DEBUG
+               if (hc->ep_type == DWC_OTG_EP_TYPE_INTR && hc->do_split
+                   && !hc->complete_split) {
+                       switch (hfnum.b.frnum & 0x7) {
+                       case 7:
+                               core_if->hfnum_7_samples++;
+                               core_if->hfnum_7_frrem_accum += hfnum.b.frrem;
+                               break;
+                       case 0:
+                               core_if->hfnum_0_samples++;
+                               core_if->hfnum_0_frrem_accum += hfnum.b.frrem;
+                               break;
+                       default:
+                               core_if->hfnum_other_samples++;
+                               core_if->hfnum_other_frrem_accum +=
+                                   hfnum.b.frrem;
+                               break;
+                       }
+               }
+#endif
+       }
+}
+
+#ifdef DEBUG
+void hc_xfer_timeout(void *ptr)
+{
+       hc_xfer_info_t *xfer_info = NULL;
+       int hc_num = 0;
+
+       if (ptr)
+               xfer_info = (hc_xfer_info_t *) ptr;
+
+       if (!xfer_info->hc) {
+               DWC_ERROR("xfer_info->hc = %p\n", xfer_info->hc);
+               return;
+       }
+
+       hc_num = xfer_info->hc->hc_num;
+       DWC_WARN("%s: timeout on channel %d\n", __func__, hc_num);
+       DWC_WARN("      start_hcchar_val 0x%08x\n",
+                xfer_info->core_if->start_hcchar_val[hc_num]);
+}
+#endif
+
+void ep_xfer_timeout(void *ptr)
+{
+       ep_xfer_info_t *xfer_info = NULL;
+       int ep_num = 0;
+       dctl_data_t dctl = {.d32 = 0 };
+       gintsts_data_t gintsts = {.d32 = 0 };
+       gintmsk_data_t gintmsk = {.d32 = 0 };
+
+       if (ptr)
+               xfer_info = (ep_xfer_info_t *) ptr;
+
+       if (!xfer_info->ep) {
+               DWC_ERROR("xfer_info->ep = %p\n", xfer_info->ep);
+               return;
+       }
+
+       ep_num = xfer_info->ep->num;
+       DWC_WARN("%s: timeout on endpoit %d\n", __func__, ep_num);
+       /* Put the sate to 2 as it was time outed */
+       xfer_info->state = 2;
+
+       dctl.d32 =
+           DWC_READ_REG32(&xfer_info->core_if->dev_if->dev_global_regs->dctl);
+       gintsts.d32 =
+           DWC_READ_REG32(&xfer_info->core_if->core_global_regs->gintsts);
+       gintmsk.d32 =
+           DWC_READ_REG32(&xfer_info->core_if->core_global_regs->gintmsk);
+
+       if (!gintmsk.b.goutnakeff) {
+               /* Unmask it */
+               gintmsk.b.goutnakeff = 1;
+               DWC_WRITE_REG32(&xfer_info->core_if->core_global_regs->gintmsk,
+                               gintmsk.d32);
+
+       }
+
+       if (!gintsts.b.goutnakeff) {
+               dctl.b.sgoutnak = 1;
+       }
+       DWC_WRITE_REG32(&xfer_info->core_if->dev_if->dev_global_regs->dctl,
+                       dctl.d32);
+
+}
+
+void set_pid_isoc(dwc_hc_t * hc)
+{
+       /* Set up the initial PID for the transfer. */
+       if (hc->speed == DWC_OTG_EP_SPEED_HIGH) {
+               if (hc->ep_is_in) {
+                       if (hc->multi_count == 1) {
+                               hc->data_pid_start = DWC_OTG_HC_PID_DATA0;
+                       } else if (hc->multi_count == 2) {
+                               hc->data_pid_start = DWC_OTG_HC_PID_DATA1;
+                       } else {
+                               hc->data_pid_start = DWC_OTG_HC_PID_DATA2;
+                       }
+               } else {
+                       if (hc->multi_count == 1) {
+                               hc->data_pid_start = DWC_OTG_HC_PID_DATA0;
+                       } else {
+                               hc->data_pid_start = DWC_OTG_HC_PID_MDATA;
+                       }
+               }
+       } else {
+               hc->data_pid_start = DWC_OTG_HC_PID_DATA0;
+       }
+}
+
+/**
+ * This function does the setup for a data transfer for a host channel and
+ * starts the transfer. May be called in either Slave mode or DMA mode. In
+ * Slave mode, the caller must ensure that there is sufficient space in the
+ * request queue and Tx Data FIFO.
+ *
+ * For an OUT transfer in Slave mode, it loads a data packet into the
+ * appropriate FIFO. If necessary, additional data packets will be loaded in
+ * the Host ISR.
+ *
+ * For an IN transfer in Slave mode, a data packet is requested. The data
+ * packets are unloaded from the Rx FIFO in the Host ISR. If necessary,
+ * additional data packets are requested in the Host ISR.
+ *
+ * For a PING transfer in Slave mode, the Do Ping bit is set in the HCTSIZ
+ * register along with a packet count of 1 and the channel is enabled. This
+ * causes a single PING transaction to occur. Other fields in HCTSIZ are
+ * simply set to 0 since no data transfer occurs in this case.
+ *
+ * For a PING transfer in DMA mode, the HCTSIZ register is initialized with
+ * all the information required to perform the subsequent data transfer. In
+ * addition, the Do Ping bit is set in the HCTSIZ register. In this case, the
+ * controller performs the entire PING protocol, then starts the data
+ * transfer.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param hc Information needed to initialize the host channel. The xfer_len
+ * value may be reduced to accommodate the max widths of the XferSize and
+ * PktCnt fields in the HCTSIZn register. The multi_count value may be changed
+ * to reflect the final xfer_len value.
+ */
+void dwc_otg_hc_start_transfer(dwc_otg_core_if_t * core_if, dwc_hc_t * hc)
+{
+       hcchar_data_t hcchar;
+       hctsiz_data_t hctsiz;
+       uint16_t num_packets;
+       uint32_t max_hc_xfer_size = core_if->core_params->max_transfer_size;
+       uint16_t max_hc_pkt_count = core_if->core_params->max_packet_count;
+       dwc_otg_hc_regs_t *hc_regs = core_if->host_if->hc_regs[hc->hc_num];
+
+       hctsiz.d32 = 0;
+
+       if (hc->do_ping) {
+               if (!core_if->dma_enable) {
+                       dwc_otg_hc_do_ping(core_if, hc);
+                       hc->xfer_started = 1;
+                       return;
+               } else {
+                       hctsiz.b.dopng = 1;
+               }
+       }
+
+       if (hc->do_split) {
+               num_packets = 1;
+
+               if (hc->complete_split && !hc->ep_is_in) {
+                       /* For CSPLIT OUT Transfer, set the size to 0 so the
+                        * core doesn't expect any data written to the FIFO */
+                       hc->xfer_len = 0;
+               } else if (hc->ep_is_in || (hc->xfer_len > hc->max_packet)) {
+                       hc->xfer_len = hc->max_packet;
+               } else if (!hc->ep_is_in && (hc->xfer_len > 188)) {
+                       hc->xfer_len = 188;
+               }
+
+               hctsiz.b.xfersize = hc->xfer_len;
+       } else {
+               /*
+                * Ensure that the transfer length and packet count will fit
+                * in the widths allocated for them in the HCTSIZn register.
+                */
+               if (hc->ep_type == DWC_OTG_EP_TYPE_INTR ||
+                   hc->ep_type == DWC_OTG_EP_TYPE_ISOC) {
+                       /*
+                        * Make sure the transfer size is no larger than one
+                        * (micro)frame's worth of data. (A check was done
+                        * when the periodic transfer was accepted to ensure
+                        * that a (micro)frame's worth of data can be
+                        * programmed into a channel.)
+                        */
+                       uint32_t max_periodic_len =
+                           hc->multi_count * hc->max_packet;
+                       if (hc->xfer_len > max_periodic_len) {
+                               hc->xfer_len = max_periodic_len;
+                       } else {
+                       }
+               } else if (hc->xfer_len > max_hc_xfer_size) {
+                       /* Make sure that xfer_len is a multiple of max packet size. */
+                       hc->xfer_len = max_hc_xfer_size - hc->max_packet + 1;
+               }
+
+               if (hc->xfer_len > 0) {
+                       num_packets =
+                           (hc->xfer_len + hc->max_packet -
+                            1) / hc->max_packet;
+                       if (num_packets > max_hc_pkt_count) {
+                               num_packets = max_hc_pkt_count;
+                               hc->xfer_len = num_packets * hc->max_packet;
+                       }
+               } else {
+                       /* Need 1 packet for transfer length of 0. */
+                       num_packets = 1;
+               }
+
+               if (hc->ep_is_in) {
+                       /* Always program an integral # of max packets for IN transfers. */
+                       hc->xfer_len = num_packets * hc->max_packet;
+               }
+
+               if (hc->ep_type == DWC_OTG_EP_TYPE_INTR ||
+                   hc->ep_type == DWC_OTG_EP_TYPE_ISOC) {
+                       /*
+                        * Make sure that the multi_count field matches the
+                        * actual transfer length.
+                        */
+                       hc->multi_count = num_packets;
+               }
+
+               if (hc->ep_type == DWC_OTG_EP_TYPE_ISOC)
+                       set_pid_isoc(hc);
+
+               hctsiz.b.xfersize = hc->xfer_len;
+       }
+
+       hc->start_pkt_count = num_packets;
+       hctsiz.b.pktcnt = num_packets;
+       hctsiz.b.pid = hc->data_pid_start;
+       DWC_WRITE_REG32(&hc_regs->hctsiz, hctsiz.d32);
+
+       DWC_DEBUGPL(DBG_HCDV, "%s: Channel %d\n", __func__, hc->hc_num);
+       DWC_DEBUGPL(DBG_HCDV, "  Xfer Size: %d\n", hctsiz.b.xfersize);
+       DWC_DEBUGPL(DBG_HCDV, "  Num Pkts: %d\n", hctsiz.b.pktcnt);
+       DWC_DEBUGPL(DBG_HCDV, "  Start PID: %d\n", hctsiz.b.pid);
+
+       if (core_if->dma_enable) {
+               dwc_dma_t dma_addr;
+               if (hc->align_buff) {
+                       dma_addr = hc->align_buff;
+               } else {
+                       dma_addr = ((unsigned long)hc->xfer_buff & 0xffffffff);
+               }
+               DWC_WRITE_REG32(&hc_regs->hcdma, dma_addr);
+       }
+
+       /* Start the split */
+       if (hc->do_split) {
+               hcsplt_data_t hcsplt;
+               hcsplt.d32 = DWC_READ_REG32(&hc_regs->hcsplt);
+               hcsplt.b.spltena = 1;
+               DWC_WRITE_REG32(&hc_regs->hcsplt, hcsplt.d32);
+       }
+
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       hcchar.b.multicnt = hc->multi_count;
+       hc_set_even_odd_frame(core_if, hc, &hcchar);
+#ifdef DEBUG
+       core_if->start_hcchar_val[hc->hc_num] = hcchar.d32;
+       if (hcchar.b.chdis) {
+               DWC_WARN("%s: chdis set, channel %d, hcchar 0x%08x\n",
+                        __func__, hc->hc_num, hcchar.d32);
+       }
+#endif
+
+       /* Set host channel enable after all other setup is complete. */
+       hcchar.b.chen = 1;
+       hcchar.b.chdis = 0;
+       DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+
+       hc->xfer_started = 1;
+       hc->requests++;
+
+       if (!core_if->dma_enable && !hc->ep_is_in && hc->xfer_len > 0) {
+               /* Load OUT packet into the appropriate Tx FIFO. */
+               dwc_otg_hc_write_packet(core_if, hc);
+       }
+#ifdef DEBUG
+       if (hc->ep_type != DWC_OTG_EP_TYPE_INTR) {
+                DWC_DEBUGPL(DBG_HCDV, "transfer %d from core_if %p\n",
+                            hc->hc_num, core_if);//GRAYG
+               core_if->hc_xfer_info[hc->hc_num].core_if = core_if;
+               core_if->hc_xfer_info[hc->hc_num].hc = hc;
+
+               /* Start a timer for this transfer. */
+               DWC_TIMER_SCHEDULE(core_if->hc_xfer_timer[hc->hc_num], 10000);
+       }
+#endif
+}
+
+/**
+ * This function does the setup for a data transfer for a host channel
+ * and starts the transfer in Descriptor DMA mode.
+ *
+ * Initializes HCTSIZ register. For a PING transfer the Do Ping bit is set.
+ * Sets PID and NTD values. For periodic transfers
+ * initializes SCHED_INFO field with micro-frame bitmap.
+ *
+ * Initializes HCDMA register with descriptor list address and CTD value
+ * then starts the transfer via enabling the channel.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param hc Information needed to initialize the host channel.
+ */
+void dwc_otg_hc_start_transfer_ddma(dwc_otg_core_if_t * core_if, dwc_hc_t * hc)
+{
+       dwc_otg_hc_regs_t *hc_regs = core_if->host_if->hc_regs[hc->hc_num];
+       hcchar_data_t hcchar;
+       hctsiz_data_t hctsiz;
+       hcdma_data_t hcdma;
+
+       hctsiz.d32 = 0;
+
+       if (hc->do_ping)
+               hctsiz.b_ddma.dopng = 1;
+
+       if (hc->ep_type == DWC_OTG_EP_TYPE_ISOC)
+               set_pid_isoc(hc);
+
+       /* Packet Count and Xfer Size are not used in Descriptor DMA mode */
+       hctsiz.b_ddma.pid = hc->data_pid_start;
+       hctsiz.b_ddma.ntd = hc->ntd - 1;        /* 0 - 1 descriptor, 1 - 2 descriptors, etc. */
+       hctsiz.b_ddma.schinfo = hc->schinfo;    /* Non-zero only for high-speed interrupt endpoints */
+
+       DWC_DEBUGPL(DBG_HCDV, "%s: Channel %d\n", __func__, hc->hc_num);
+       DWC_DEBUGPL(DBG_HCDV, "  Start PID: %d\n", hctsiz.b.pid);
+       DWC_DEBUGPL(DBG_HCDV, "  NTD: %d\n", hctsiz.b_ddma.ntd);
+
+       DWC_WRITE_REG32(&hc_regs->hctsiz, hctsiz.d32);
+
+       hcdma.d32 = 0;
+       hcdma.b.dma_addr = ((uint32_t) hc->desc_list_addr) >> 11;
+
+       /* Always start from first descriptor. */
+       hcdma.b.ctd = 0;
+       DWC_WRITE_REG32(&hc_regs->hcdma, hcdma.d32);
+
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       hcchar.b.multicnt = hc->multi_count;
+
+#ifdef DEBUG
+       core_if->start_hcchar_val[hc->hc_num] = hcchar.d32;
+       if (hcchar.b.chdis) {
+               DWC_WARN("%s: chdis set, channel %d, hcchar 0x%08x\n",
+                        __func__, hc->hc_num, hcchar.d32);
+       }
+#endif
+
+       /* Set host channel enable after all other setup is complete. */
+       hcchar.b.chen = 1;
+       hcchar.b.chdis = 0;
+
+       DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+
+       hc->xfer_started = 1;
+       hc->requests++;
+
+#ifdef DEBUG
+       if ((hc->ep_type != DWC_OTG_EP_TYPE_INTR)
+           && (hc->ep_type != DWC_OTG_EP_TYPE_ISOC)) {
+                DWC_DEBUGPL(DBG_HCDV, "DMA transfer %d from core_if %p\n",
+                            hc->hc_num, core_if);//GRAYG
+               core_if->hc_xfer_info[hc->hc_num].core_if = core_if;
+               core_if->hc_xfer_info[hc->hc_num].hc = hc;
+               /* Start a timer for this transfer. */
+               DWC_TIMER_SCHEDULE(core_if->hc_xfer_timer[hc->hc_num], 10000);
+       }
+#endif
+
+}
+
+/**
+ * This function continues a data transfer that was started by previous call
+ * to <code>dwc_otg_hc_start_transfer</code>. The caller must ensure there is
+ * sufficient space in the request queue and Tx Data FIFO. This function
+ * should only be called in Slave mode. In DMA mode, the controller acts
+ * autonomously to complete transfers programmed to a host channel.
+ *
+ * For an OUT transfer, a new data packet is loaded into the appropriate FIFO
+ * if there is any data remaining to be queued. For an IN transfer, another
+ * data packet is always requested. For the SETUP phase of a control transfer,
+ * this function does nothing.
+ *
+ * @return 1 if a new request is queued, 0 if no more requests are required
+ * for this transfer.
+ */
+int dwc_otg_hc_continue_transfer(dwc_otg_core_if_t * core_if, dwc_hc_t * hc)
+{
+       DWC_DEBUGPL(DBG_HCDV, "%s: Channel %d\n", __func__, hc->hc_num);
+
+       if (hc->do_split) {
+               /* SPLITs always queue just once per channel */
+               return 0;
+       } else if (hc->data_pid_start == DWC_OTG_HC_PID_SETUP) {
+               /* SETUPs are queued only once since they can't be NAKed. */
+               return 0;
+       } else if (hc->ep_is_in) {
+               /*
+                * Always queue another request for other IN transfers. If
+                * back-to-back INs are issued and NAKs are received for both,
+                * the driver may still be processing the first NAK when the
+                * second NAK is received. When the interrupt handler clears
+                * the NAK interrupt for the first NAK, the second NAK will
+                * not be seen. So we can't depend on the NAK interrupt
+                * handler to requeue a NAKed request. Instead, IN requests
+                * are issued each time this function is called. When the
+                * transfer completes, the extra requests for the channel will
+                * be flushed.
+                */
+               hcchar_data_t hcchar;
+               dwc_otg_hc_regs_t *hc_regs =
+                   core_if->host_if->hc_regs[hc->hc_num];
+
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+               hc_set_even_odd_frame(core_if, hc, &hcchar);
+               hcchar.b.chen = 1;
+               hcchar.b.chdis = 0;
+               DWC_DEBUGPL(DBG_HCDV, "  IN xfer: hcchar = 0x%08x\n",
+                           hcchar.d32);
+               DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+               hc->requests++;
+               return 1;
+       } else {
+               /* OUT transfers. */
+               if (hc->xfer_count < hc->xfer_len) {
+                       if (hc->ep_type == DWC_OTG_EP_TYPE_INTR ||
+                           hc->ep_type == DWC_OTG_EP_TYPE_ISOC) {
+                               hcchar_data_t hcchar;
+                               dwc_otg_hc_regs_t *hc_regs;
+                               hc_regs = core_if->host_if->hc_regs[hc->hc_num];
+                               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+                               hc_set_even_odd_frame(core_if, hc, &hcchar);
+                       }
+
+                       /* Load OUT packet into the appropriate Tx FIFO. */
+                       dwc_otg_hc_write_packet(core_if, hc);
+                       hc->requests++;
+                       return 1;
+               } else {
+                       return 0;
+               }
+       }
+}
+
+/**
+ * Starts a PING transfer. This function should only be called in Slave mode.
+ * The Do Ping bit is set in the HCTSIZ register, then the channel is enabled.
+ */
+void dwc_otg_hc_do_ping(dwc_otg_core_if_t * core_if, dwc_hc_t * hc)
+{
+       hcchar_data_t hcchar;
+       hctsiz_data_t hctsiz;
+       dwc_otg_hc_regs_t *hc_regs = core_if->host_if->hc_regs[hc->hc_num];
+
+       DWC_DEBUGPL(DBG_HCDV, "%s: Channel %d\n", __func__, hc->hc_num);
+
+       hctsiz.d32 = 0;
+       hctsiz.b.dopng = 1;
+       hctsiz.b.pktcnt = 1;
+       DWC_WRITE_REG32(&hc_regs->hctsiz, hctsiz.d32);
+
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       hcchar.b.chen = 1;
+       hcchar.b.chdis = 0;
+       DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+}
+
+/*
+ * This function writes a packet into the Tx FIFO associated with the Host
+ * Channel. For a channel associated with a non-periodic EP, the non-periodic
+ * Tx FIFO is written. For a channel associated with a periodic EP, the
+ * periodic Tx FIFO is written. This function should only be called in Slave
+ * mode.
+ *
+ * Upon return the xfer_buff and xfer_count fields in _hc are incremented by
+ * then number of bytes written to the Tx FIFO.
+ */
+void dwc_otg_hc_write_packet(dwc_otg_core_if_t * core_if, dwc_hc_t * hc)
+{
+       uint32_t i;
+       uint32_t remaining_count;
+       uint32_t byte_count;
+       uint32_t dword_count;
+
+       uint32_t *data_buff = (uint32_t *) (hc->xfer_buff);
+       uint32_t *data_fifo = core_if->data_fifo[hc->hc_num];
+
+       remaining_count = hc->xfer_len - hc->xfer_count;
+       if (remaining_count > hc->max_packet) {
+               byte_count = hc->max_packet;
+       } else {
+               byte_count = remaining_count;
+       }
+
+       dword_count = (byte_count + 3) / 4;
+
+       if ((((unsigned long)data_buff) & 0x3) == 0) {
+               /* xfer_buff is DWORD aligned. */
+               for (i = 0; i < dword_count; i++, data_buff++) {
+                       DWC_WRITE_REG32(data_fifo, *data_buff);
+               }
+       } else {
+               /* xfer_buff is not DWORD aligned. */
+               for (i = 0; i < dword_count; i++, data_buff++) {
+                       uint32_t data;
+                       data =
+                           (data_buff[0] | data_buff[1] << 8 | data_buff[2] <<
+                            16 | data_buff[3] << 24);
+                       DWC_WRITE_REG32(data_fifo, data);
+               }
+       }
+
+       hc->xfer_count += byte_count;
+       hc->xfer_buff += byte_count;
+}
+
+/**
+ * Gets the current USB frame number. This is the frame number from the last
+ * SOF packet.
+ */
+uint32_t dwc_otg_get_frame_number(dwc_otg_core_if_t * core_if)
+{
+       dsts_data_t dsts;
+       dsts.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
+
+       /* read current frame/microframe number from DSTS register */
+       return dsts.b.soffn;
+}
+
+/**
+ * Calculates and gets the frame Interval value of HFIR register according PHY
+ * type and speed.The application can modify a value of HFIR register only after
+ * the Port Enable bit of the Host Port Control and Status register
+ * (HPRT.PrtEnaPort) has been set.
+*/
+
+uint32_t calc_frame_interval(dwc_otg_core_if_t * core_if)
+{
+       gusbcfg_data_t usbcfg;
+       hwcfg2_data_t hwcfg2;
+       hprt0_data_t hprt0;
+       int clock = 60;         // default value
+       usbcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+       hwcfg2.d32 = DWC_READ_REG32(&core_if->core_global_regs->ghwcfg2);
+       hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
+       if (!usbcfg.b.physel && usbcfg.b.ulpi_utmi_sel && !usbcfg.b.phyif)
+               clock = 60;
+       if (usbcfg.b.physel && hwcfg2.b.fs_phy_type == 3)
+               clock = 48;
+       if (!usbcfg.b.phylpwrclksel && !usbcfg.b.physel &&
+           !usbcfg.b.ulpi_utmi_sel && usbcfg.b.phyif)
+               clock = 30;
+       if (!usbcfg.b.phylpwrclksel && !usbcfg.b.physel &&
+           !usbcfg.b.ulpi_utmi_sel && !usbcfg.b.phyif)
+               clock = 60;
+       if (usbcfg.b.phylpwrclksel && !usbcfg.b.physel &&
+           !usbcfg.b.ulpi_utmi_sel && usbcfg.b.phyif)
+               clock = 48;
+       if (usbcfg.b.physel && !usbcfg.b.phyif && hwcfg2.b.fs_phy_type == 2)
+               clock = 48;
+       if (usbcfg.b.physel && hwcfg2.b.fs_phy_type == 1)
+               clock = 48;
+       if (hprt0.b.prtspd == 0)
+               /* High speed case */
+               return 125 * clock - 1;
+       else
+               /* FS/LS case */
+               return 1000 * clock - 1;
+}
+
+/**
+ * This function reads a setup packet from the Rx FIFO into the destination
+ * buffer. This function is called from the Rx Status Queue Level (RxStsQLvl)
+ * Interrupt routine when a SETUP packet has been received in Slave mode.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param dest Destination buffer for packet data.
+ */
+void dwc_otg_read_setup_packet(dwc_otg_core_if_t * core_if, uint32_t * dest)
+{
+       device_grxsts_data_t status;
+       /* Get the 8 bytes of a setup transaction data */
+
+       /* Pop 2 DWORDS off the receive data FIFO into memory */
+       dest[0] = DWC_READ_REG32(core_if->data_fifo[0]);
+       dest[1] = DWC_READ_REG32(core_if->data_fifo[0]);
+       if (core_if->snpsid >= OTG_CORE_REV_3_00a) {
+               status.d32 =
+                   DWC_READ_REG32(&core_if->core_global_regs->grxstsp);
+               DWC_DEBUGPL(DBG_ANY,
+                           "EP:%d BCnt:%d " "pktsts:%x Frame:%d(0x%0x)\n",
+                           status.b.epnum, status.b.bcnt, status.b.pktsts,
+                           status.b.fn, status.b.fn);
+       }
+}
+
+/**
+ * This function enables EP0 OUT to receive SETUP packets and configures EP0
+ * IN for transmitting packets. It is normally called when the
+ * "Enumeration Done" interrupt occurs.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP0 data.
+ */
+void dwc_otg_ep0_activate(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       dsts_data_t dsts;
+       depctl_data_t diepctl;
+       depctl_data_t doepctl;
+       dctl_data_t dctl = {.d32 = 0 };
+
+       ep->stp_rollover = 0;
+       /* Read the Device Status and Endpoint 0 Control registers */
+       dsts.d32 = DWC_READ_REG32(&dev_if->dev_global_regs->dsts);
+       diepctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[0]->diepctl);
+       doepctl.d32 = DWC_READ_REG32(&dev_if->out_ep_regs[0]->doepctl);
+
+       /* Set the MPS of the IN EP based on the enumeration speed */
+       switch (dsts.b.enumspd) {
+       case DWC_DSTS_ENUMSPD_HS_PHY_30MHZ_OR_60MHZ:
+       case DWC_DSTS_ENUMSPD_FS_PHY_30MHZ_OR_60MHZ:
+       case DWC_DSTS_ENUMSPD_FS_PHY_48MHZ:
+               diepctl.b.mps = DWC_DEP0CTL_MPS_64;
+               break;
+       case DWC_DSTS_ENUMSPD_LS_PHY_6MHZ:
+               diepctl.b.mps = DWC_DEP0CTL_MPS_8;
+               break;
+       }
+
+       DWC_WRITE_REG32(&dev_if->in_ep_regs[0]->diepctl, diepctl.d32);
+
+       /* Enable OUT EP for receive */
+       if (core_if->snpsid <= OTG_CORE_REV_2_94a) {
+       doepctl.b.epena = 1;
+       DWC_WRITE_REG32(&dev_if->out_ep_regs[0]->doepctl, doepctl.d32);
+       }
+#ifdef VERBOSE
+       DWC_DEBUGPL(DBG_PCDV, "doepctl0=%0x\n",
+                   DWC_READ_REG32(&dev_if->out_ep_regs[0]->doepctl));
+       DWC_DEBUGPL(DBG_PCDV, "diepctl0=%0x\n",
+                   DWC_READ_REG32(&dev_if->in_ep_regs[0]->diepctl));
+#endif
+       dctl.b.cgnpinnak = 1;
+
+       DWC_MODIFY_REG32(&dev_if->dev_global_regs->dctl, dctl.d32, dctl.d32);
+       DWC_DEBUGPL(DBG_PCDV, "dctl=%0x\n",
+                   DWC_READ_REG32(&dev_if->dev_global_regs->dctl));
+
+}
+
+/**
+ * This function activates an EP.  The Device EP control register for
+ * the EP is configured as defined in the ep structure. Note: This
+ * function is not used for EP0.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to activate.
+ */
+void dwc_otg_ep_activate(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       depctl_data_t depctl;
+       volatile uint32_t *addr;
+       daint_data_t daintmsk = {.d32 = 0 };
+       dcfg_data_t dcfg;
+       uint8_t i;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s() EP%d-%s\n", __func__, ep->num,
+                   (ep->is_in ? "IN" : "OUT"));
+
+#ifdef DWC_UTE_PER_IO
+       ep->xiso_frame_num = 0xFFFFFFFF;
+       ep->xiso_active_xfers = 0;
+       ep->xiso_queued_xfers = 0;
+#endif
+       /* Read DEPCTLn register */
+       if (ep->is_in == 1) {
+               addr = &dev_if->in_ep_regs[ep->num]->diepctl;
+               daintmsk.ep.in = 1 << ep->num;
+       } else {
+               addr = &dev_if->out_ep_regs[ep->num]->doepctl;
+               daintmsk.ep.out = 1 << ep->num;
+       }
+
+       /* If the EP is already active don't change the EP Control
+        * register. */
+       depctl.d32 = DWC_READ_REG32(addr);
+       if (!depctl.b.usbactep) {
+               depctl.b.mps = ep->maxpacket;
+               depctl.b.eptype = ep->type;
+               depctl.b.txfnum = ep->tx_fifo_num;
+
+               if (ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                       depctl.b.setd0pid = 1;  // ???
+               } else {
+                       depctl.b.setd0pid = 1;
+               }
+               depctl.b.usbactep = 1;
+
+               /* Update nextep_seq array and EPMSCNT in DCFG*/
+               if (!(depctl.b.eptype & 1) && (ep->is_in == 1)) {       // NP IN EP
+                       for (i = 0; i <= core_if->dev_if->num_in_eps; i++) {
+                               if (core_if->nextep_seq[i] == core_if->first_in_nextep_seq)
+                               break;
+                       }
+                       core_if->nextep_seq[i] = ep->num;
+                       core_if->nextep_seq[ep->num] = core_if->first_in_nextep_seq;
+                       depctl.b.nextep = core_if->nextep_seq[ep->num];
+                       dcfg.d32 = DWC_READ_REG32(&dev_if->dev_global_regs->dcfg);
+                       dcfg.b.epmscnt++;
+                       DWC_WRITE_REG32(&dev_if->dev_global_regs->dcfg, dcfg.d32);
+
+                       DWC_DEBUGPL(DBG_PCDV,
+                                   "%s first_in_nextep_seq= %2d; nextep_seq[]:\n",
+                               __func__, core_if->first_in_nextep_seq);
+                       for (i=0; i <= core_if->dev_if->num_in_eps; i++) {
+                               DWC_DEBUGPL(DBG_PCDV, "%2d\n",
+                                           core_if->nextep_seq[i]);
+                       }
+
+               }
+
+
+               DWC_WRITE_REG32(addr, depctl.d32);
+               DWC_DEBUGPL(DBG_PCDV, "DEPCTL=%08x\n", DWC_READ_REG32(addr));
+       }
+
+       /* Enable the Interrupt for this EP */
+       if (core_if->multiproc_int_enable) {
+               if (ep->is_in == 1) {
+                       diepmsk_data_t diepmsk = {.d32 = 0 };
+                       diepmsk.b.xfercompl = 1;
+                       diepmsk.b.timeout = 1;
+                       diepmsk.b.epdisabled = 1;
+                       diepmsk.b.ahberr = 1;
+                       diepmsk.b.intknepmis = 1;
+                       if (!core_if->en_multiple_tx_fifo && core_if->dma_enable)
+                               diepmsk.b.intknepmis = 0;
+                       diepmsk.b.txfifoundrn = 1;      //?????
+                       if (ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                               diepmsk.b.nak = 1;
+                       }
+
+
+
+/*
+                       if (core_if->dma_desc_enable) {
+                               diepmsk.b.bna = 1;
+                       }
+*/
+/*
+                       if (core_if->dma_enable) {
+                               doepmsk.b.nak = 1;
+                       }
+*/
+                       DWC_WRITE_REG32(&dev_if->dev_global_regs->
+                                       diepeachintmsk[ep->num], diepmsk.d32);
+
+               } else {
+                       doepmsk_data_t doepmsk = {.d32 = 0 };
+                       doepmsk.b.xfercompl = 1;
+                       doepmsk.b.ahberr = 1;
+                       doepmsk.b.epdisabled = 1;
+                       if (ep->type == DWC_OTG_EP_TYPE_ISOC)
+                               doepmsk.b.outtknepdis = 1;
+
+/*
+
+                       if (core_if->dma_desc_enable) {
+                               doepmsk.b.bna = 1;
+                       }
+*/
+/*
+                       doepmsk.b.babble = 1;
+                       doepmsk.b.nyet = 1;
+                       doepmsk.b.nak = 1;
+*/
+                       DWC_WRITE_REG32(&dev_if->dev_global_regs->
+                                       doepeachintmsk[ep->num], doepmsk.d32);
+               }
+               DWC_MODIFY_REG32(&dev_if->dev_global_regs->deachintmsk,
+                                0, daintmsk.d32);
+       } else {
+               if (ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                       if (ep->is_in) {
+                               diepmsk_data_t diepmsk = {.d32 = 0 };
+                               diepmsk.b.nak = 1;
+                               DWC_MODIFY_REG32(&dev_if->dev_global_regs->diepmsk, 0, diepmsk.d32);
+                       } else {
+                               doepmsk_data_t doepmsk = {.d32 = 0 };
+                               doepmsk.b.outtknepdis = 1;
+                               DWC_MODIFY_REG32(&dev_if->dev_global_regs->doepmsk, 0, doepmsk.d32);
+                       }
+               }
+               DWC_MODIFY_REG32(&dev_if->dev_global_regs->daintmsk,
+                                0, daintmsk.d32);
+       }
+
+       DWC_DEBUGPL(DBG_PCDV, "DAINTMSK=%0x\n",
+                   DWC_READ_REG32(&dev_if->dev_global_regs->daintmsk));
+
+       ep->stall_clear_flag = 0;
+
+       return;
+}
+
+/**
+ * This function deactivates an EP. This is done by clearing the USB Active
+ * EP bit in the Device EP control register. Note: This function is not used
+ * for EP0. EP0 cannot be deactivated.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to deactivate.
+ */
+void dwc_otg_ep_deactivate(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       depctl_data_t depctl = {.d32 = 0 };
+       volatile uint32_t *addr;
+       daint_data_t daintmsk = {.d32 = 0 };
+       dcfg_data_t dcfg;
+       uint8_t i = 0;
+
+#ifdef DWC_UTE_PER_IO
+       ep->xiso_frame_num = 0xFFFFFFFF;
+       ep->xiso_active_xfers = 0;
+       ep->xiso_queued_xfers = 0;
+#endif
+
+       /* Read DEPCTLn register */
+       if (ep->is_in == 1) {
+               addr = &core_if->dev_if->in_ep_regs[ep->num]->diepctl;
+               daintmsk.ep.in = 1 << ep->num;
+       } else {
+               addr = &core_if->dev_if->out_ep_regs[ep->num]->doepctl;
+               daintmsk.ep.out = 1 << ep->num;
+       }
+
+       depctl.d32 = DWC_READ_REG32(addr);
+
+       depctl.b.usbactep = 0;
+
+       /* Update nextep_seq array and EPMSCNT in DCFG*/
+       if (!(depctl.b.eptype & 1) && ep->is_in == 1) { // NP EP IN
+               for (i = 0; i <= core_if->dev_if->num_in_eps; i++) {
+                       if (core_if->nextep_seq[i] == ep->num)
+                       break;
+               }
+               core_if->nextep_seq[i] = core_if->nextep_seq[ep->num];
+               if (core_if->first_in_nextep_seq == ep->num)
+                       core_if->first_in_nextep_seq = i;
+               core_if->nextep_seq[ep->num] = 0xff;
+               depctl.b.nextep = 0;
+               dcfg.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg);
+               dcfg.b.epmscnt--;
+               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dcfg,
+                               dcfg.d32);
+
+               DWC_DEBUGPL(DBG_PCDV,
+                           "%s first_in_nextep_seq= %2d; nextep_seq[]:\n",
+                               __func__, core_if->first_in_nextep_seq);
+                       for (i=0; i <= core_if->dev_if->num_in_eps; i++) {
+                               DWC_DEBUGPL(DBG_PCDV, "%2d\n", core_if->nextep_seq[i]);
+                       }
+       }
+
+       if (ep->is_in == 1)
+               depctl.b.txfnum = 0;
+
+       if (core_if->dma_desc_enable)
+               depctl.b.epdis = 1;
+
+       DWC_WRITE_REG32(addr, depctl.d32);
+       depctl.d32 = DWC_READ_REG32(addr);
+       if (core_if->dma_enable && ep->type == DWC_OTG_EP_TYPE_ISOC
+           && depctl.b.epena) {
+               depctl_data_t depctl = {.d32 = 0};
+               if (ep->is_in) {
+                       diepint_data_t diepint = {.d32 = 0};
+
+                       depctl.b.snak = 1;
+                       DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[ep->num]->
+                                       diepctl, depctl.d32);
+                       do {
+                               dwc_udelay(10);
+                               diepint.d32 =
+                                   DWC_READ_REG32(&core_if->
+                                                  dev_if->in_ep_regs[ep->num]->
+                                                  diepint);
+                       } while (!diepint.b.inepnakeff);
+                       diepint.b.inepnakeff = 1;
+                       DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[ep->num]->
+                                       diepint, diepint.d32);
+                       depctl.d32 = 0;
+                       depctl.b.epdis = 1;
+                       DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[ep->num]->
+                                       diepctl, depctl.d32);
+                       do {
+                               dwc_udelay(10);
+                               diepint.d32 =
+                                   DWC_READ_REG32(&core_if->
+                                                  dev_if->in_ep_regs[ep->num]->
+                                                  diepint);
+                       } while (!diepint.b.epdisabled);
+                       diepint.b.epdisabled = 1;
+                       DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[ep->num]->
+                                       diepint, diepint.d32);
+               } else {
+                       dctl_data_t dctl = {.d32 = 0};
+                       gintmsk_data_t gintsts = {.d32 = 0};
+                       doepint_data_t doepint = {.d32 = 0};
+                       dctl.b.sgoutnak = 1;
+                       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->
+                                        dctl, 0, dctl.d32);
+                       do {
+                               dwc_udelay(10);
+                               gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+                       } while (!gintsts.b.goutnakeff);
+                       gintsts.d32 = 0;
+                       gintsts.b.goutnakeff = 1;
+                       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+                       depctl.d32 = 0;
+                       depctl.b.epdis = 1;
+                       depctl.b.snak = 1;
+                       DWC_WRITE_REG32(&core_if->dev_if->out_ep_regs[ep->num]->doepctl, depctl.d32);
+                       do
+                       {
+                               dwc_udelay(10);
+                               doepint.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                       out_ep_regs[ep->num]->doepint);
+                       } while (!doepint.b.epdisabled);
+
+                       doepint.b.epdisabled = 1;
+                       DWC_WRITE_REG32(&core_if->dev_if->out_ep_regs[ep->num]->doepint, doepint.d32);
+
+                       dctl.d32 = 0;
+                       dctl.b.cgoutnak = 1;
+                       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, 0, dctl.d32);
+               }
+       }
+
+       /* Disable the Interrupt for this EP */
+       if (core_if->multiproc_int_enable) {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->deachintmsk,
+                                daintmsk.d32, 0);
+
+               if (ep->is_in == 1) {
+                       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->
+                                       diepeachintmsk[ep->num], 0);
+               } else {
+                       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->
+                                       doepeachintmsk[ep->num], 0);
+               }
+       } else {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->daintmsk,
+                                daintmsk.d32, 0);
+       }
+
+}
+
+/**
+ * This function initializes dma descriptor chain.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ */
+static void init_dma_desc_chain(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       dwc_otg_dev_dma_desc_t *dma_desc;
+       uint32_t offset;
+       uint32_t xfer_est;
+       int i;
+       unsigned maxxfer_local, total_len;
+
+       if (!ep->is_in && ep->type == DWC_OTG_EP_TYPE_INTR &&
+                                       (ep->maxpacket%4)) {
+               maxxfer_local = ep->maxpacket;
+               total_len = ep->xfer_len;
+       } else {
+               maxxfer_local = ep->maxxfer;
+               total_len = ep->total_len;
+       }
+
+       ep->desc_cnt = (total_len / maxxfer_local) +
+            ((total_len % maxxfer_local) ? 1 : 0);
+
+       if (!ep->desc_cnt)
+               ep->desc_cnt = 1;
+
+       if (ep->desc_cnt > MAX_DMA_DESC_CNT)
+               ep->desc_cnt = MAX_DMA_DESC_CNT;
+
+       dma_desc = ep->desc_addr;
+       if (maxxfer_local == ep->maxpacket) {
+               if ((total_len % maxxfer_local) &&
+                               (total_len/maxxfer_local < MAX_DMA_DESC_CNT)) {
+                       xfer_est = (ep->desc_cnt - 1) * maxxfer_local +
+                                       (total_len % maxxfer_local);
+               } else
+                       xfer_est = ep->desc_cnt * maxxfer_local;
+       } else
+               xfer_est = total_len;
+       offset = 0;
+       for (i = 0; i < ep->desc_cnt; ++i) {
+               /** DMA Descriptor Setup */
+               if (xfer_est > maxxfer_local) {
+                       dma_desc->status.b.bs = BS_HOST_BUSY;
+                       dma_desc->status.b.l = 0;
+                       dma_desc->status.b.ioc = 0;
+                       dma_desc->status.b.sp = 0;
+                       dma_desc->status.b.bytes = maxxfer_local;
+                       dma_desc->buf = ep->dma_addr + offset;
+                       dma_desc->status.b.sts = 0;
+                       dma_desc->status.b.bs = BS_HOST_READY;
+
+                       xfer_est -= maxxfer_local;
+                       offset += maxxfer_local;
+               } else {
+                       dma_desc->status.b.bs = BS_HOST_BUSY;
+                       dma_desc->status.b.l = 1;
+                       dma_desc->status.b.ioc = 1;
+                       if (ep->is_in) {
+                               dma_desc->status.b.sp =
+                                   (xfer_est %
+                                    ep->maxpacket) ? 1 : ((ep->
+                                                           sent_zlp) ? 1 : 0);
+                               dma_desc->status.b.bytes = xfer_est;
+                       } else {
+                               if (maxxfer_local == ep->maxpacket)
+                                       dma_desc->status.b.bytes = xfer_est;
+                               else
+                                       dma_desc->status.b.bytes =
+                                               xfer_est + ((4 - (xfer_est & 0x3)) & 0x3);
+                       }
+
+                       dma_desc->buf = ep->dma_addr + offset;
+                       dma_desc->status.b.sts = 0;
+                       dma_desc->status.b.bs = BS_HOST_READY;
+               }
+               dma_desc++;
+       }
+}
+/**
+ * This function is called when to write ISOC data into appropriate dedicated
+ * periodic FIFO.
+ */
+static int32_t write_isoc_tx_fifo(dwc_otg_core_if_t * core_if, dwc_ep_t * dwc_ep)
+{
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       dwc_otg_dev_in_ep_regs_t *ep_regs;
+       dtxfsts_data_t txstatus = {.d32 = 0 };
+       uint32_t len = 0;
+       int epnum = dwc_ep->num;
+       int dwords;
+
+       DWC_DEBUGPL(DBG_PCD, "Dedicated TxFifo Empty: %d \n", epnum);
+
+       ep_regs = core_if->dev_if->in_ep_regs[epnum];
+
+       len = dwc_ep->xfer_len - dwc_ep->xfer_count;
+
+       if (len > dwc_ep->maxpacket) {
+               len = dwc_ep->maxpacket;
+       }
+
+       dwords = (len + 3) / 4;
+
+       /* While there is space in the queue and space in the FIFO and
+        * More data to tranfer, Write packets to the Tx FIFO */
+       txstatus.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->dtxfsts);
+       DWC_DEBUGPL(DBG_PCDV, "b4 dtxfsts[%d]=0x%08x\n", epnum, txstatus.d32);
+
+       while (txstatus.b.txfspcavail > dwords &&
+              dwc_ep->xfer_count < dwc_ep->xfer_len && dwc_ep->xfer_len != 0) {
+               /* Write the FIFO */
+               dwc_otg_ep_write_packet(core_if, dwc_ep, 0);
+
+               len = dwc_ep->xfer_len - dwc_ep->xfer_count;
+               if (len > dwc_ep->maxpacket) {
+                       len = dwc_ep->maxpacket;
+               }
+
+               dwords = (len + 3) / 4;
+               txstatus.d32 =
+                   DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->dtxfsts);
+               DWC_DEBUGPL(DBG_PCDV, "dtxfsts[%d]=0x%08x\n", epnum,
+                           txstatus.d32);
+       }
+
+       DWC_DEBUGPL(DBG_PCDV, "b4 dtxfsts[%d]=0x%08x\n", epnum,
+                   DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->dtxfsts));
+
+       return 1;
+}
+/**
+ * This function does the setup for a data transfer for an EP and
+ * starts the transfer. For an IN transfer, the packets will be
+ * loaded into the appropriate Tx FIFO in the ISR. For OUT transfers,
+ * the packets are unloaded from the Rx FIFO in the ISR.  the ISR.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ */
+
+void dwc_otg_ep_start_transfer(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       depctl_data_t depctl;
+       deptsiz_data_t deptsiz;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_DEBUGPL((DBG_PCDV | DBG_CILV), "%s()\n", __func__);
+       DWC_DEBUGPL(DBG_PCD, "ep%d-%s xfer_len=%d xfer_cnt=%d "
+                   "xfer_buff=%p start_xfer_buff=%p, total_len = %d\n",
+                   ep->num, (ep->is_in ? "IN" : "OUT"), ep->xfer_len,
+                   ep->xfer_count, ep->xfer_buff, ep->start_xfer_buff,
+                   ep->total_len);
+       /* IN endpoint */
+       if (ep->is_in == 1) {
+               dwc_otg_dev_in_ep_regs_t *in_regs =
+                   core_if->dev_if->in_ep_regs[ep->num];
+
+               gnptxsts_data_t gtxstatus;
+
+               gtxstatus.d32 =
+                   DWC_READ_REG32(&core_if->core_global_regs->gnptxsts);
+
+               if (core_if->en_multiple_tx_fifo == 0
+                   && gtxstatus.b.nptxqspcavail == 0 && !core_if->dma_enable) {
+#ifdef DEBUG
+                       DWC_PRINTF("TX Queue Full (0x%0x)\n", gtxstatus.d32);
+#endif
+                       return;
+               }
+
+               depctl.d32 = DWC_READ_REG32(&(in_regs->diepctl));
+               deptsiz.d32 = DWC_READ_REG32(&(in_regs->dieptsiz));
+
+               if (ep->maxpacket > ep->maxxfer / MAX_PKT_CNT)
+                       ep->xfer_len += (ep->maxxfer < (ep->total_len - ep->xfer_len)) ?
+                               ep->maxxfer : (ep->total_len - ep->xfer_len);
+               else
+                       ep->xfer_len += (MAX_PKT_CNT * ep->maxpacket < (ep->total_len - ep->xfer_len)) ?
+                                MAX_PKT_CNT * ep->maxpacket : (ep->total_len - ep->xfer_len);
+
+
+               /* Zero Length Packet? */
+               if ((ep->xfer_len - ep->xfer_count) == 0) {
+                       deptsiz.b.xfersize = 0;
+                       deptsiz.b.pktcnt = 1;
+               } else {
+                       /* Program the transfer size and packet count
+                        *      as follows: xfersize = N * maxpacket +
+                        *      short_packet pktcnt = N + (short_packet
+                        *      exist ? 1 : 0)
+                        */
+                       deptsiz.b.xfersize = ep->xfer_len - ep->xfer_count;
+                       deptsiz.b.pktcnt =
+                           (ep->xfer_len - ep->xfer_count - 1 +
+                            ep->maxpacket) / ep->maxpacket;
+                       if (deptsiz.b.pktcnt > MAX_PKT_CNT) {
+                               deptsiz.b.pktcnt = MAX_PKT_CNT;
+                               deptsiz.b.xfersize = deptsiz.b.pktcnt * ep->maxpacket;
+                       }
+                       if (ep->type == DWC_OTG_EP_TYPE_ISOC)
+                               deptsiz.b.mc = deptsiz.b.pktcnt;
+               }
+
+               /* Write the DMA register */
+               if (core_if->dma_enable) {
+                       if (core_if->dma_desc_enable == 0) {
+                               if (ep->type != DWC_OTG_EP_TYPE_ISOC)
+                                       deptsiz.b.mc = 1;
+                               DWC_WRITE_REG32(&in_regs->dieptsiz,
+                                               deptsiz.d32);
+                               DWC_WRITE_REG32(&(in_regs->diepdma),
+                                               (uint32_t) ep->dma_addr);
+                       } else {
+#ifdef DWC_UTE_CFI
+                               /* The descriptor chain should be already initialized by now */
+                               if (ep->buff_mode != BM_STANDARD) {
+                                       DWC_WRITE_REG32(&in_regs->diepdma,
+                                                       ep->descs_dma_addr);
+                               } else {
+#endif
+                                       init_dma_desc_chain(core_if, ep);
+                               /** DIEPDMAn Register write */
+                                       DWC_WRITE_REG32(&in_regs->diepdma,
+                                                       ep->dma_desc_addr);
+#ifdef DWC_UTE_CFI
+                               }
+#endif
+                       }
+               } else {
+                       DWC_WRITE_REG32(&in_regs->dieptsiz, deptsiz.d32);
+                       if (ep->type != DWC_OTG_EP_TYPE_ISOC) {
+                               /**
+                                * Enable the Non-Periodic Tx FIFO empty interrupt,
+                                * or the Tx FIFO epmty interrupt in dedicated Tx FIFO mode,
+                                * the data will be written into the fifo by the ISR.
+                                */
+                               if (core_if->en_multiple_tx_fifo == 0) {
+                                       intr_mask.b.nptxfempty = 1;
+                                       DWC_MODIFY_REG32
+                                           (&core_if->core_global_regs->gintmsk,
+                                            intr_mask.d32, intr_mask.d32);
+                               } else {
+                                       /* Enable the Tx FIFO Empty Interrupt for this EP */
+                                       if (ep->xfer_len > 0) {
+                                               uint32_t fifoemptymsk = 0;
+                                               fifoemptymsk = 1 << ep->num;
+                                               DWC_MODIFY_REG32
+                                                   (&core_if->dev_if->dev_global_regs->dtknqr4_fifoemptymsk,
+                                                    0, fifoemptymsk);
+
+                                       }
+                               }
+                       }  else {
+                                        write_isoc_tx_fifo(core_if, ep);
+                       }
+               }
+               if (!core_if->core_params->en_multiple_tx_fifo && core_if->dma_enable)
+                       depctl.b.nextep = core_if->nextep_seq[ep->num];
+
+               if (ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                       dsts_data_t dsts = {.d32 = 0};
+                       if (ep->bInterval == 1) {
+                               dsts.d32 =
+                                   DWC_READ_REG32(&core_if->dev_if->
+                                                  dev_global_regs->dsts);
+                               ep->frame_num = dsts.b.soffn + ep->bInterval;
+                               if (ep->frame_num > 0x3FFF) {
+                                       ep->frm_overrun = 1;
+                                       ep->frame_num &= 0x3FFF;
+                               } else
+                                       ep->frm_overrun = 0;
+                               if (ep->frame_num & 0x1) {
+                                       depctl.b.setd1pid = 1;
+                               } else {
+                                       depctl.b.setd0pid = 1;
+                               }
+                       }
+               }
+               /* EP enable, IN data in FIFO */
+               depctl.b.cnak = 1;
+               depctl.b.epena = 1;
+               DWC_WRITE_REG32(&in_regs->diepctl, depctl.d32);
+
+       } else {
+               /* OUT endpoint */
+               dwc_otg_dev_out_ep_regs_t *out_regs =
+                   core_if->dev_if->out_ep_regs[ep->num];
+
+               depctl.d32 = DWC_READ_REG32(&(out_regs->doepctl));
+               deptsiz.d32 = DWC_READ_REG32(&(out_regs->doeptsiz));
+
+               if (!core_if->dma_desc_enable) {
+                       if (ep->maxpacket > ep->maxxfer / MAX_PKT_CNT)
+                               ep->xfer_len += (ep->maxxfer < (ep->total_len - ep->xfer_len)) ?
+                               ep->maxxfer : (ep->total_len - ep->xfer_len);
+                else
+                                       ep->xfer_len += (MAX_PKT_CNT * ep->maxpacket < (ep->total_len
+                                       - ep->xfer_len)) ? MAX_PKT_CNT * ep->maxpacket : (ep->total_len - ep->xfer_len);
+               }
+
+               /* Program the transfer size and packet count as follows:
+                *
+                *      pktcnt = N
+                *      xfersize = N * maxpacket
+                */
+               if ((ep->xfer_len - ep->xfer_count) == 0) {
+                       /* Zero Length Packet */
+                       deptsiz.b.xfersize = ep->maxpacket;
+                       deptsiz.b.pktcnt = 1;
+               } else {
+                       deptsiz.b.pktcnt =
+                           (ep->xfer_len - ep->xfer_count +
+                            (ep->maxpacket - 1)) / ep->maxpacket;
+                       if (deptsiz.b.pktcnt > MAX_PKT_CNT) {
+                               deptsiz.b.pktcnt = MAX_PKT_CNT;
+                       }
+                       if (!core_if->dma_desc_enable) {
+                               ep->xfer_len =
+                                       deptsiz.b.pktcnt * ep->maxpacket + ep->xfer_count;
+                       }
+                       deptsiz.b.xfersize = ep->xfer_len - ep->xfer_count;
+               }
+
+               DWC_DEBUGPL(DBG_PCDV, "ep%d xfersize=%d pktcnt=%d\n",
+                           ep->num, deptsiz.b.xfersize, deptsiz.b.pktcnt);
+
+               if (core_if->dma_enable) {
+                       if (!core_if->dma_desc_enable) {
+                               DWC_WRITE_REG32(&out_regs->doeptsiz,
+                                               deptsiz.d32);
+
+                               DWC_WRITE_REG32(&(out_regs->doepdma),
+                                               (uint32_t) ep->dma_addr);
+                       } else {
+#ifdef DWC_UTE_CFI
+                               /* The descriptor chain should be already initialized by now */
+                               if (ep->buff_mode != BM_STANDARD) {
+                                       DWC_WRITE_REG32(&out_regs->doepdma,
+                                                       ep->descs_dma_addr);
+                               } else {
+#endif
+                                       /** This is used for interrupt out transfers*/
+                                       if (!ep->xfer_len)
+                                               ep->xfer_len = ep->total_len;
+                                       init_dma_desc_chain(core_if, ep);
+
+                                       if (core_if->core_params->dev_out_nak) {
+                                               if (ep->type == DWC_OTG_EP_TYPE_BULK) {
+                                                       deptsiz.b.pktcnt = (ep->total_len +
+                                                               (ep->maxpacket - 1)) / ep->maxpacket;
+                                                       deptsiz.b.xfersize = ep->total_len;
+                                                       /* Remember initial value of doeptsiz */
+                                                       core_if->start_doeptsiz_val[ep->num] = deptsiz.d32;
+                                                       DWC_WRITE_REG32(&out_regs->doeptsiz,
+                                                               deptsiz.d32);
+                                               }
+                                       }
+                               /** DOEPDMAn Register write */
+                                       DWC_WRITE_REG32(&out_regs->doepdma,
+                                                       ep->dma_desc_addr);
+#ifdef DWC_UTE_CFI
+                               }
+#endif
+                       }
+               } else {
+                       DWC_WRITE_REG32(&out_regs->doeptsiz, deptsiz.d32);
+               }
+
+               if (ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                       dsts_data_t dsts = {.d32 = 0};
+                       if (ep->bInterval == 1) {
+                               dsts.d32 =
+                                   DWC_READ_REG32(&core_if->dev_if->
+                                                  dev_global_regs->dsts);
+                               ep->frame_num = dsts.b.soffn + ep->bInterval;
+                               if (ep->frame_num > 0x3FFF) {
+                                       ep->frm_overrun = 1;
+                                       ep->frame_num &= 0x3FFF;
+                               } else
+                                       ep->frm_overrun = 0;
+
+                               if (ep->frame_num & 0x1) {
+                                       depctl.b.setd1pid = 1;
+                               } else {
+                                       depctl.b.setd0pid = 1;
+                               }
+                       }
+               }
+
+               /* EP enable */
+               depctl.b.cnak = 1;
+               depctl.b.epena = 1;
+
+               DWC_WRITE_REG32(&out_regs->doepctl, depctl.d32);
+
+               DWC_DEBUGPL(DBG_PCD, "DOEPCTL=%08x DOEPTSIZ=%08x\n",
+                           DWC_READ_REG32(&out_regs->doepctl),
+                           DWC_READ_REG32(&out_regs->doeptsiz));
+               DWC_DEBUGPL(DBG_PCD, "DAINTMSK=%08x GINTMSK=%08x\n",
+                           DWC_READ_REG32(&core_if->dev_if->dev_global_regs->
+                                          daintmsk),
+                           DWC_READ_REG32(&core_if->core_global_regs->
+                                          gintmsk));
+
+               /* Timer is scheduling only for out bulk transfers for
+                * "Device DDMA OUT NAK Enhancement" feature to inform user
+                * about received data payload in case of timeout
+                */
+               if (core_if->core_params->dev_out_nak) {
+                       if (ep->type == DWC_OTG_EP_TYPE_BULK) {
+                               core_if->ep_xfer_info[ep->num].core_if = core_if;
+                               core_if->ep_xfer_info[ep->num].ep = ep;
+                               core_if->ep_xfer_info[ep->num].state = 1;
+
+                               /* Start a timer for this transfer. */
+                               DWC_TIMER_SCHEDULE(core_if->ep_xfer_timer[ep->num], 10000);
+                       }
+               }
+       }
+}
+
+/**
+ * This function setup a zero length transfer in Buffer DMA and
+ * Slave modes for usb requests with zero field set
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ *
+ */
+void dwc_otg_ep_start_zl_transfer(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+
+       depctl_data_t depctl;
+       deptsiz_data_t deptsiz;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_DEBUGPL((DBG_PCDV | DBG_CILV), "%s()\n", __func__);
+       DWC_PRINTF("zero length transfer is called\n");
+
+       /* IN endpoint */
+       if (ep->is_in == 1) {
+               dwc_otg_dev_in_ep_regs_t *in_regs =
+                   core_if->dev_if->in_ep_regs[ep->num];
+
+               depctl.d32 = DWC_READ_REG32(&(in_regs->diepctl));
+               deptsiz.d32 = DWC_READ_REG32(&(in_regs->dieptsiz));
+
+               deptsiz.b.xfersize = 0;
+               deptsiz.b.pktcnt = 1;
+
+               /* Write the DMA register */
+               if (core_if->dma_enable) {
+                       if (core_if->dma_desc_enable == 0) {
+                               deptsiz.b.mc = 1;
+                               DWC_WRITE_REG32(&in_regs->dieptsiz,
+                                               deptsiz.d32);
+                               DWC_WRITE_REG32(&(in_regs->diepdma),
+                                               (uint32_t) ep->dma_addr);
+                       }
+               } else {
+                       DWC_WRITE_REG32(&in_regs->dieptsiz, deptsiz.d32);
+                       /**
+                        * Enable the Non-Periodic Tx FIFO empty interrupt,
+                        * or the Tx FIFO epmty interrupt in dedicated Tx FIFO mode,
+                        * the data will be written into the fifo by the ISR.
+                        */
+                       if (core_if->en_multiple_tx_fifo == 0) {
+                               intr_mask.b.nptxfempty = 1;
+                               DWC_MODIFY_REG32(&core_if->
+                                                core_global_regs->gintmsk,
+                                                intr_mask.d32, intr_mask.d32);
+                       } else {
+                               /* Enable the Tx FIFO Empty Interrupt for this EP */
+                               if (ep->xfer_len > 0) {
+                                       uint32_t fifoemptymsk = 0;
+                                       fifoemptymsk = 1 << ep->num;
+                                       DWC_MODIFY_REG32(&core_if->
+                                                        dev_if->dev_global_regs->dtknqr4_fifoemptymsk,
+                                                        0, fifoemptymsk);
+                               }
+                       }
+               }
+
+               if (!core_if->core_params->en_multiple_tx_fifo && core_if->dma_enable)
+                       depctl.b.nextep = core_if->nextep_seq[ep->num];
+               /* EP enable, IN data in FIFO */
+               depctl.b.cnak = 1;
+               depctl.b.epena = 1;
+               DWC_WRITE_REG32(&in_regs->diepctl, depctl.d32);
+
+       } else {
+               /* OUT endpoint */
+               dwc_otg_dev_out_ep_regs_t *out_regs =
+                   core_if->dev_if->out_ep_regs[ep->num];
+
+               depctl.d32 = DWC_READ_REG32(&(out_regs->doepctl));
+               deptsiz.d32 = DWC_READ_REG32(&(out_regs->doeptsiz));
+
+               /* Zero Length Packet */
+               deptsiz.b.xfersize = ep->maxpacket;
+               deptsiz.b.pktcnt = 1;
+
+               if (core_if->dma_enable) {
+                       if (!core_if->dma_desc_enable) {
+                               DWC_WRITE_REG32(&out_regs->doeptsiz,
+                                               deptsiz.d32);
+
+                               DWC_WRITE_REG32(&(out_regs->doepdma),
+                                               (uint32_t) ep->dma_addr);
+                       }
+               } else {
+                       DWC_WRITE_REG32(&out_regs->doeptsiz, deptsiz.d32);
+               }
+
+               /* EP enable */
+               depctl.b.cnak = 1;
+               depctl.b.epena = 1;
+
+               DWC_WRITE_REG32(&out_regs->doepctl, depctl.d32);
+
+       }
+}
+
+/**
+ * This function does the setup for a data transfer for EP0 and starts
+ * the transfer.  For an IN transfer, the packets will be loaded into
+ * the appropriate Tx FIFO in the ISR. For OUT transfers, the packets are
+ * unloaded from the Rx FIFO in the ISR.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP0 data.
+ */
+void dwc_otg_ep0_start_transfer(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       depctl_data_t depctl;
+       deptsiz0_data_t deptsiz;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       dwc_otg_dev_dma_desc_t *dma_desc;
+
+       DWC_DEBUGPL(DBG_PCD, "ep%d-%s xfer_len=%d xfer_cnt=%d "
+                   "xfer_buff=%p start_xfer_buff=%p \n",
+                   ep->num, (ep->is_in ? "IN" : "OUT"), ep->xfer_len,
+                   ep->xfer_count, ep->xfer_buff, ep->start_xfer_buff);
+
+       ep->total_len = ep->xfer_len;
+
+       /* IN endpoint */
+       if (ep->is_in == 1) {
+               dwc_otg_dev_in_ep_regs_t *in_regs =
+                   core_if->dev_if->in_ep_regs[0];
+
+               gnptxsts_data_t gtxstatus;
+
+               if (core_if->snpsid >= OTG_CORE_REV_3_00a) {
+                       depctl.d32 = DWC_READ_REG32(&in_regs->diepctl);
+                       if (depctl.b.epena)
+                               return;
+               }
+
+               gtxstatus.d32 =
+                   DWC_READ_REG32(&core_if->core_global_regs->gnptxsts);
+
+               /* If dedicated FIFO every time flush fifo before enable ep*/
+               if (core_if->en_multiple_tx_fifo && core_if->snpsid >= OTG_CORE_REV_3_00a)
+                       dwc_otg_flush_tx_fifo(core_if, ep->tx_fifo_num);
+
+               if (core_if->en_multiple_tx_fifo == 0
+                   && gtxstatus.b.nptxqspcavail == 0
+                   && !core_if->dma_enable) {
+#ifdef DEBUG
+                       deptsiz.d32 = DWC_READ_REG32(&in_regs->dieptsiz);
+                       DWC_DEBUGPL(DBG_PCD, "DIEPCTL0=%0x\n",
+                                   DWC_READ_REG32(&in_regs->diepctl));
+                       DWC_DEBUGPL(DBG_PCD, "DIEPTSIZ0=%0x (sz=%d, pcnt=%d)\n",
+                                   deptsiz.d32,
+                                   deptsiz.b.xfersize, deptsiz.b.pktcnt);
+                       DWC_PRINTF("TX Queue or FIFO Full (0x%0x)\n",
+                                  gtxstatus.d32);
+#endif
+                       return;
+               }
+
+               depctl.d32 = DWC_READ_REG32(&in_regs->diepctl);
+               deptsiz.d32 = DWC_READ_REG32(&in_regs->dieptsiz);
+
+               /* Zero Length Packet? */
+               if (ep->xfer_len == 0) {
+                       deptsiz.b.xfersize = 0;
+                       deptsiz.b.pktcnt = 1;
+               } else {
+                       /* Program the transfer size and packet count
+                        *      as follows: xfersize = N * maxpacket +
+                        *      short_packet pktcnt = N + (short_packet
+                        *      exist ? 1 : 0)
+                        */
+                       if (ep->xfer_len > ep->maxpacket) {
+                               ep->xfer_len = ep->maxpacket;
+                               deptsiz.b.xfersize = ep->maxpacket;
+                       } else {
+                               deptsiz.b.xfersize = ep->xfer_len;
+                       }
+                       deptsiz.b.pktcnt = 1;
+
+               }
+               DWC_DEBUGPL(DBG_PCDV,
+                           "IN len=%d  xfersize=%d pktcnt=%d [%08x]\n",
+                           ep->xfer_len, deptsiz.b.xfersize, deptsiz.b.pktcnt,
+                           deptsiz.d32);
+
+               /* Write the DMA register */
+               if (core_if->dma_enable) {
+                       if (core_if->dma_desc_enable == 0) {
+                               DWC_WRITE_REG32(&in_regs->dieptsiz,
+                                               deptsiz.d32);
+
+                               DWC_WRITE_REG32(&(in_regs->diepdma),
+                                               (uint32_t) ep->dma_addr);
+                       } else {
+                               dma_desc = core_if->dev_if->in_desc_addr;
+
+                               /** DMA Descriptor Setup */
+                               dma_desc->status.b.bs = BS_HOST_BUSY;
+                               dma_desc->status.b.l = 1;
+                               dma_desc->status.b.ioc = 1;
+                               dma_desc->status.b.sp =
+                                   (ep->xfer_len == ep->maxpacket) ? 0 : 1;
+                               dma_desc->status.b.bytes = ep->xfer_len;
+                               dma_desc->buf = ep->dma_addr;
+                               dma_desc->status.b.sts = 0;
+                               dma_desc->status.b.bs = BS_HOST_READY;
+
+                               /** DIEPDMA0 Register write */
+                               DWC_WRITE_REG32(&in_regs->diepdma,
+                                               core_if->
+                                               dev_if->dma_in_desc_addr);
+                       }
+               } else {
+                       DWC_WRITE_REG32(&in_regs->dieptsiz, deptsiz.d32);
+               }
+
+               if (!core_if->core_params->en_multiple_tx_fifo && core_if->dma_enable)
+                       depctl.b.nextep = core_if->nextep_seq[ep->num];
+               /* EP enable, IN data in FIFO */
+               depctl.b.cnak = 1;
+               depctl.b.epena = 1;
+               DWC_WRITE_REG32(&in_regs->diepctl, depctl.d32);
+
+               /**
+                * Enable the Non-Periodic Tx FIFO empty interrupt, the
+                * data will be written into the fifo by the ISR.
+                */
+               if (!core_if->dma_enable) {
+                       if (core_if->en_multiple_tx_fifo == 0) {
+                               intr_mask.b.nptxfempty = 1;
+                               DWC_MODIFY_REG32(&core_if->
+                                                core_global_regs->gintmsk,
+                                                intr_mask.d32, intr_mask.d32);
+                       } else {
+                               /* Enable the Tx FIFO Empty Interrupt for this EP */
+                               if (ep->xfer_len > 0) {
+                                       uint32_t fifoemptymsk = 0;
+                                       fifoemptymsk |= 1 << ep->num;
+                                       DWC_MODIFY_REG32(&core_if->
+                                                        dev_if->dev_global_regs->dtknqr4_fifoemptymsk,
+                                                        0, fifoemptymsk);
+                               }
+                       }
+               }
+       } else {
+               /* OUT endpoint */
+               dwc_otg_dev_out_ep_regs_t *out_regs =
+                   core_if->dev_if->out_ep_regs[0];
+
+               depctl.d32 = DWC_READ_REG32(&out_regs->doepctl);
+               deptsiz.d32 = DWC_READ_REG32(&out_regs->doeptsiz);
+
+               /* Program the transfer size and packet count as follows:
+                *      xfersize = N * (maxpacket + 4 - (maxpacket % 4))
+                *      pktcnt = N                                                                                      */
+               /* Zero Length Packet */
+               deptsiz.b.xfersize = ep->maxpacket;
+               deptsiz.b.pktcnt = 1;
+               if (core_if->snpsid >= OTG_CORE_REV_3_00a)
+                       deptsiz.b.supcnt = 3;
+
+               DWC_DEBUGPL(DBG_PCDV, "len=%d  xfersize=%d pktcnt=%d\n",
+                           ep->xfer_len, deptsiz.b.xfersize, deptsiz.b.pktcnt);
+
+               if (core_if->dma_enable) {
+                       if (!core_if->dma_desc_enable) {
+                               DWC_WRITE_REG32(&out_regs->doeptsiz,
+                                               deptsiz.d32);
+
+                               DWC_WRITE_REG32(&(out_regs->doepdma),
+                                               (uint32_t) ep->dma_addr);
+                       } else {
+                               dma_desc = core_if->dev_if->out_desc_addr;
+
+                               /** DMA Descriptor Setup */
+                               dma_desc->status.b.bs = BS_HOST_BUSY;
+                               if (core_if->snpsid >= OTG_CORE_REV_3_00a) {
+                                       dma_desc->status.b.mtrf = 0;
+                                       dma_desc->status.b.sr = 0;
+                               }
+                               dma_desc->status.b.l = 1;
+                               dma_desc->status.b.ioc = 1;
+                               dma_desc->status.b.bytes = ep->maxpacket;
+                               dma_desc->buf = ep->dma_addr;
+                               dma_desc->status.b.sts = 0;
+                               dma_desc->status.b.bs = BS_HOST_READY;
+
+                               /** DOEPDMA0 Register write */
+                               DWC_WRITE_REG32(&out_regs->doepdma,
+                                               core_if->dev_if->
+                                               dma_out_desc_addr);
+                       }
+               } else {
+                       DWC_WRITE_REG32(&out_regs->doeptsiz, deptsiz.d32);
+               }
+
+               /* EP enable */
+               depctl.b.cnak = 1;
+               depctl.b.epena = 1;
+               DWC_WRITE_REG32(&(out_regs->doepctl), depctl.d32);
+       }
+}
+
+/**
+ * This function continues control IN transfers started by
+ * dwc_otg_ep0_start_transfer, when the transfer does not fit in a
+ * single packet.  NOTE: The DIEPCTL0/DOEPCTL0 registers only have one
+ * bit for the packet count.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP0 data.
+ */
+void dwc_otg_ep0_continue_transfer(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       depctl_data_t depctl;
+       deptsiz0_data_t deptsiz;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       dwc_otg_dev_dma_desc_t *dma_desc;
+
+       if (ep->is_in == 1) {
+               dwc_otg_dev_in_ep_regs_t *in_regs =
+                   core_if->dev_if->in_ep_regs[0];
+               gnptxsts_data_t tx_status = {.d32 = 0 };
+
+               tx_status.d32 =
+                   DWC_READ_REG32(&core_if->core_global_regs->gnptxsts);
+               /** @todo Should there be check for room in the Tx
+                * Status Queue.  If not remove the code above this comment. */
+
+               depctl.d32 = DWC_READ_REG32(&in_regs->diepctl);
+               deptsiz.d32 = DWC_READ_REG32(&in_regs->dieptsiz);
+
+               /* Program the transfer size and packet count
+                *      as follows: xfersize = N * maxpacket +
+                *      short_packet pktcnt = N + (short_packet
+                *      exist ? 1 : 0)
+                */
+
+               if (core_if->dma_desc_enable == 0) {
+                       deptsiz.b.xfersize =
+                           (ep->total_len - ep->xfer_count) >
+                           ep->maxpacket ? ep->maxpacket : (ep->total_len -
+                                                            ep->xfer_count);
+                       deptsiz.b.pktcnt = 1;
+                       if (core_if->dma_enable == 0) {
+                               ep->xfer_len += deptsiz.b.xfersize;
+                       } else {
+                               ep->xfer_len = deptsiz.b.xfersize;
+                       }
+                       DWC_WRITE_REG32(&in_regs->dieptsiz, deptsiz.d32);
+               } else {
+                       ep->xfer_len =
+                           (ep->total_len - ep->xfer_count) >
+                           ep->maxpacket ? ep->maxpacket : (ep->total_len -
+                                                            ep->xfer_count);
+
+                       dma_desc = core_if->dev_if->in_desc_addr;
+
+                       /** DMA Descriptor Setup */
+                       dma_desc->status.b.bs = BS_HOST_BUSY;
+                       dma_desc->status.b.l = 1;
+                       dma_desc->status.b.ioc = 1;
+                       dma_desc->status.b.sp =
+                           (ep->xfer_len == ep->maxpacket) ? 0 : 1;
+                       dma_desc->status.b.bytes = ep->xfer_len;
+                       dma_desc->buf = ep->dma_addr;
+                       dma_desc->status.b.sts = 0;
+                       dma_desc->status.b.bs = BS_HOST_READY;
+
+                       /** DIEPDMA0 Register write */
+                       DWC_WRITE_REG32(&in_regs->diepdma,
+                                       core_if->dev_if->dma_in_desc_addr);
+               }
+
+               DWC_DEBUGPL(DBG_PCDV,
+                           "IN len=%d  xfersize=%d pktcnt=%d [%08x]\n",
+                           ep->xfer_len, deptsiz.b.xfersize, deptsiz.b.pktcnt,
+                           deptsiz.d32);
+
+               /* Write the DMA register */
+               if (core_if->hwcfg2.b.architecture == DWC_INT_DMA_ARCH) {
+                       if (core_if->dma_desc_enable == 0)
+                               DWC_WRITE_REG32(&(in_regs->diepdma),
+                                               (uint32_t) ep->dma_addr);
+               }
+               if (!core_if->core_params->en_multiple_tx_fifo && core_if->dma_enable)
+                       depctl.b.nextep = core_if->nextep_seq[ep->num];
+               /* EP enable, IN data in FIFO */
+               depctl.b.cnak = 1;
+               depctl.b.epena = 1;
+               DWC_WRITE_REG32(&in_regs->diepctl, depctl.d32);
+
+               /**
+                * Enable the Non-Periodic Tx FIFO empty interrupt, the
+                * data will be written into the fifo by the ISR.
+                */
+               if (!core_if->dma_enable) {
+                       if (core_if->en_multiple_tx_fifo == 0) {
+                               /* First clear it from GINTSTS */
+                               intr_mask.b.nptxfempty = 1;
+                               DWC_MODIFY_REG32(&core_if->
+                                                core_global_regs->gintmsk,
+                                                intr_mask.d32, intr_mask.d32);
+
+                       } else {
+                               /* Enable the Tx FIFO Empty Interrupt for this EP */
+                               if (ep->xfer_len > 0) {
+                                       uint32_t fifoemptymsk = 0;
+                                       fifoemptymsk |= 1 << ep->num;
+                                       DWC_MODIFY_REG32(&core_if->
+                                                        dev_if->dev_global_regs->dtknqr4_fifoemptymsk,
+                                                        0, fifoemptymsk);
+                               }
+                       }
+               }
+       } else {
+               dwc_otg_dev_out_ep_regs_t *out_regs =
+                   core_if->dev_if->out_ep_regs[0];
+
+               depctl.d32 = DWC_READ_REG32(&out_regs->doepctl);
+               deptsiz.d32 = DWC_READ_REG32(&out_regs->doeptsiz);
+
+               /* Program the transfer size and packet count
+                *      as follows: xfersize = N * maxpacket +
+                *      short_packet pktcnt = N + (short_packet
+                *      exist ? 1 : 0)
+                */
+               deptsiz.b.xfersize = ep->maxpacket;
+               deptsiz.b.pktcnt = 1;
+
+               if (core_if->dma_desc_enable == 0) {
+                       DWC_WRITE_REG32(&out_regs->doeptsiz, deptsiz.d32);
+               } else {
+                       dma_desc = core_if->dev_if->out_desc_addr;
+
+                       /** DMA Descriptor Setup */
+                       dma_desc->status.b.bs = BS_HOST_BUSY;
+                       dma_desc->status.b.l = 1;
+                       dma_desc->status.b.ioc = 1;
+                       dma_desc->status.b.bytes = ep->maxpacket;
+                       dma_desc->buf = ep->dma_addr;
+                       dma_desc->status.b.sts = 0;
+                       dma_desc->status.b.bs = BS_HOST_READY;
+
+                       /** DOEPDMA0 Register write */
+                       DWC_WRITE_REG32(&out_regs->doepdma,
+                                       core_if->dev_if->dma_out_desc_addr);
+               }
+
+               DWC_DEBUGPL(DBG_PCDV,
+                           "IN len=%d  xfersize=%d pktcnt=%d [%08x]\n",
+                           ep->xfer_len, deptsiz.b.xfersize, deptsiz.b.pktcnt,
+                           deptsiz.d32);
+
+               /* Write the DMA register */
+               if (core_if->hwcfg2.b.architecture == DWC_INT_DMA_ARCH) {
+                       if (core_if->dma_desc_enable == 0)
+                               DWC_WRITE_REG32(&(out_regs->doepdma),
+                                               (uint32_t) ep->dma_addr);
+
+               }
+
+               /* EP enable, IN data in FIFO */
+               depctl.b.cnak = 1;
+               depctl.b.epena = 1;
+               DWC_WRITE_REG32(&out_regs->doepctl, depctl.d32);
+
+       }
+}
+
+#ifdef DEBUG
+void dump_msg(const u8 * buf, unsigned int length)
+{
+       unsigned int start, num, i;
+       char line[52], *p;
+
+       if (length >= 512)
+               return;
+       start = 0;
+       while (length > 0) {
+               num = length < 16u ? length : 16u;
+               p = line;
+               for (i = 0; i < num; ++i) {
+                       if (i == 8)
+                               *p++ = ' ';
+                       DWC_SPRINTF(p, " %02x", buf[i]);
+                       p += 3;
+               }
+               *p = 0;
+               DWC_PRINTF("%6x: %s\n", start, line);
+               buf += num;
+               start += num;
+               length -= num;
+       }
+}
+#else
+static inline void dump_msg(const u8 * buf, unsigned int length)
+{
+}
+#endif
+
+/**
+ * This function writes a packet into the Tx FIFO associated with the
+ * EP. For non-periodic EPs the non-periodic Tx FIFO is written.  For
+ * periodic EPs the periodic Tx FIFO associated with the EP is written
+ * with all packets for the next micro-frame.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to write packet for.
+ * @param dma Indicates if DMA is being used.
+ */
+void dwc_otg_ep_write_packet(dwc_otg_core_if_t * core_if, dwc_ep_t * ep,
+                            int dma)
+{
+       /**
+        * The buffer is padded to DWORD on a per packet basis in
+        * slave/dma mode if the MPS is not DWORD aligned. The last
+        * packet, if short, is also padded to a multiple of DWORD.
+        *
+        * ep->xfer_buff always starts DWORD aligned in memory and is a
+        * multiple of DWORD in length
+        *
+        * ep->xfer_len can be any number of bytes
+        *
+        * ep->xfer_count is a multiple of ep->maxpacket until the last
+        *      packet
+        *
+        * FIFO access is DWORD */
+
+       uint32_t i;
+       uint32_t byte_count;
+       uint32_t dword_count;
+       uint32_t *fifo;
+       uint32_t *data_buff = (uint32_t *) ep->xfer_buff;
+
+       DWC_DEBUGPL((DBG_PCDV | DBG_CILV), "%s(%p,%p)\n", __func__, core_if,
+                   ep);
+       if (ep->xfer_count >= ep->xfer_len) {
+               DWC_WARN("%s() No data for EP%d!!!\n", __func__, ep->num);
+               return;
+       }
+
+       /* Find the byte length of the packet either short packet or MPS */
+       if ((ep->xfer_len - ep->xfer_count) < ep->maxpacket) {
+               byte_count = ep->xfer_len - ep->xfer_count;
+       } else {
+               byte_count = ep->maxpacket;
+       }
+
+       /* Find the DWORD length, padded by extra bytes as neccessary if MPS
+        * is not a multiple of DWORD */
+       dword_count = (byte_count + 3) / 4;
+
+#ifdef VERBOSE
+       dump_msg(ep->xfer_buff, byte_count);
+#endif
+
+       /**@todo NGS Where are the Periodic Tx FIFO addresses
+        * intialized?  What should this be? */
+
+       fifo = core_if->data_fifo[ep->num];
+
+       DWC_DEBUGPL((DBG_PCDV | DBG_CILV), "fifo=%p buff=%p *p=%08x bc=%d\n",
+                   fifo, data_buff, *data_buff, byte_count);
+
+       if (!dma) {
+               for (i = 0; i < dword_count; i++, data_buff++) {
+                       DWC_WRITE_REG32(fifo, *data_buff);
+               }
+       }
+
+       ep->xfer_count += byte_count;
+       ep->xfer_buff += byte_count;
+       ep->dma_addr += byte_count;
+}
+
+/**
+ * Set the EP STALL.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to set the stall on.
+ */
+void dwc_otg_ep_set_stall(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       depctl_data_t depctl;
+       volatile uint32_t *depctl_addr;
+
+       DWC_DEBUGPL(DBG_PCD, "%s ep%d-%s\n", __func__, ep->num,
+                   (ep->is_in ? "IN" : "OUT"));
+
+       if (ep->is_in == 1) {
+               depctl_addr = &(core_if->dev_if->in_ep_regs[ep->num]->diepctl);
+               depctl.d32 = DWC_READ_REG32(depctl_addr);
+
+               /* set the disable and stall bits */
+               if (depctl.b.epena) {
+                       depctl.b.epdis = 1;
+               }
+               depctl.b.stall = 1;
+               DWC_WRITE_REG32(depctl_addr, depctl.d32);
+       } else {
+               depctl_addr = &(core_if->dev_if->out_ep_regs[ep->num]->doepctl);
+               depctl.d32 = DWC_READ_REG32(depctl_addr);
+
+               /* set the stall bit */
+               depctl.b.stall = 1;
+               DWC_WRITE_REG32(depctl_addr, depctl.d32);
+       }
+
+       DWC_DEBUGPL(DBG_PCD, "DEPCTL=%0x\n", DWC_READ_REG32(depctl_addr));
+
+       return;
+}
+
+/**
+ * Clear the EP STALL.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to clear stall from.
+ */
+void dwc_otg_ep_clear_stall(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       depctl_data_t depctl;
+       volatile uint32_t *depctl_addr;
+
+       DWC_DEBUGPL(DBG_PCD, "%s ep%d-%s\n", __func__, ep->num,
+                   (ep->is_in ? "IN" : "OUT"));
+
+       if (ep->is_in == 1) {
+               depctl_addr = &(core_if->dev_if->in_ep_regs[ep->num]->diepctl);
+       } else {
+               depctl_addr = &(core_if->dev_if->out_ep_regs[ep->num]->doepctl);
+       }
+
+       depctl.d32 = DWC_READ_REG32(depctl_addr);
+
+       /* clear the stall bits */
+       depctl.b.stall = 0;
+
+       /*
+        * USB Spec 9.4.5: For endpoints using data toggle, regardless
+        * of whether an endpoint has the Halt feature set, a
+        * ClearFeature(ENDPOINT_HALT) request always results in the
+        * data toggle being reinitialized to DATA0.
+        */
+       if (ep->type == DWC_OTG_EP_TYPE_INTR ||
+           ep->type == DWC_OTG_EP_TYPE_BULK) {
+               depctl.b.setd0pid = 1;  /* DATA0 */
+       }
+
+       DWC_WRITE_REG32(depctl_addr, depctl.d32);
+       DWC_DEBUGPL(DBG_PCD, "DEPCTL=%0x\n", DWC_READ_REG32(depctl_addr));
+       return;
+}
+
+/**
+ * This function reads a packet from the Rx FIFO into the destination
+ * buffer. To read SETUP data use dwc_otg_read_setup_packet.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param dest   Destination buffer for the packet.
+ * @param bytes  Number of bytes to copy to the destination.
+ */
+void dwc_otg_read_packet(dwc_otg_core_if_t * core_if,
+                        uint8_t * dest, uint16_t bytes)
+{
+       int i;
+       int word_count = (bytes + 3) / 4;
+
+       volatile uint32_t *fifo = core_if->data_fifo[0];
+       uint32_t *data_buff = (uint32_t *) dest;
+
+       /**
+        * @todo Account for the case where _dest is not dword aligned. This
+        * requires reading data from the FIFO into a uint32_t temp buffer,
+        * then moving it into the data buffer.
+        */
+
+       DWC_DEBUGPL((DBG_PCDV | DBG_CILV), "%s(%p,%p,%d)\n", __func__,
+                   core_if, dest, bytes);
+
+       for (i = 0; i < word_count; i++, data_buff++) {
+               *data_buff = DWC_READ_REG32(fifo);
+       }
+
+       return;
+}
+
+/**
+ * This functions reads the device registers and prints them
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+void dwc_otg_dump_dev_registers(dwc_otg_core_if_t * core_if)
+{
+       int i;
+       volatile uint32_t *addr;
+
+       DWC_PRINTF("Device Global Registers\n");
+       addr = &core_if->dev_if->dev_global_regs->dcfg;
+       DWC_PRINTF("DCFG                 @0x%08lX : 0x%08X\n",
+                  (unsigned long)addr, DWC_READ_REG32(addr));
+       addr = &core_if->dev_if->dev_global_regs->dctl;
+       DWC_PRINTF("DCTL                 @0x%08lX : 0x%08X\n",
+                  (unsigned long)addr, DWC_READ_REG32(addr));
+       addr = &core_if->dev_if->dev_global_regs->dsts;
+       DWC_PRINTF("DSTS                 @0x%08lX : 0x%08X\n",
+                  (unsigned long)addr, DWC_READ_REG32(addr));
+       addr = &core_if->dev_if->dev_global_regs->diepmsk;
+       DWC_PRINTF("DIEPMSK      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->dev_if->dev_global_regs->doepmsk;
+       DWC_PRINTF("DOEPMSK      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->dev_if->dev_global_regs->daint;
+       DWC_PRINTF("DAINT        @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->dev_if->dev_global_regs->daintmsk;
+       DWC_PRINTF("DAINTMSK     @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->dev_if->dev_global_regs->dtknqr1;
+       DWC_PRINTF("DTKNQR1      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       if (core_if->hwcfg2.b.dev_token_q_depth > 6) {
+               addr = &core_if->dev_if->dev_global_regs->dtknqr2;
+               DWC_PRINTF("DTKNQR2      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+       }
+
+       addr = &core_if->dev_if->dev_global_regs->dvbusdis;
+       DWC_PRINTF("DVBUSID      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+
+       addr = &core_if->dev_if->dev_global_regs->dvbuspulse;
+       DWC_PRINTF("DVBUSPULSE  @0x%08lX : 0x%08X\n",
+                  (unsigned long)addr, DWC_READ_REG32(addr));
+
+       addr = &core_if->dev_if->dev_global_regs->dtknqr3_dthrctl;
+       DWC_PRINTF("DTKNQR3_DTHRCTL      @0x%08lX : 0x%08X\n",
+                  (unsigned long)addr, DWC_READ_REG32(addr));
+
+       if (core_if->hwcfg2.b.dev_token_q_depth > 22) {
+               addr = &core_if->dev_if->dev_global_regs->dtknqr4_fifoemptymsk;
+               DWC_PRINTF("DTKNQR4      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+       }
+
+       addr = &core_if->dev_if->dev_global_regs->dtknqr4_fifoemptymsk;
+       DWC_PRINTF("FIFOEMPMSK   @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+
+       if (core_if->hwcfg2.b.multi_proc_int) {
+
+               addr = &core_if->dev_if->dev_global_regs->deachint;
+               DWC_PRINTF("DEACHINT     @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->dev_if->dev_global_regs->deachintmsk;
+               DWC_PRINTF("DEACHINTMSK  @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+
+               for (i = 0; i <= core_if->dev_if->num_in_eps; i++) {
+                       addr =
+                           &core_if->dev_if->
+                           dev_global_regs->diepeachintmsk[i];
+                       DWC_PRINTF("DIEPEACHINTMSK[%d]   @0x%08lX : 0x%08X\n",
+                                  i, (unsigned long)addr,
+                                  DWC_READ_REG32(addr));
+               }
+
+               for (i = 0; i <= core_if->dev_if->num_out_eps; i++) {
+                       addr =
+                           &core_if->dev_if->
+                           dev_global_regs->doepeachintmsk[i];
+                       DWC_PRINTF("DOEPEACHINTMSK[%d]   @0x%08lX : 0x%08X\n",
+                                  i, (unsigned long)addr,
+                                  DWC_READ_REG32(addr));
+               }
+       }
+
+       for (i = 0; i <= core_if->dev_if->num_in_eps; i++) {
+               DWC_PRINTF("Device IN EP %d Registers\n", i);
+               addr = &core_if->dev_if->in_ep_regs[i]->diepctl;
+               DWC_PRINTF("DIEPCTL      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->dev_if->in_ep_regs[i]->diepint;
+               DWC_PRINTF("DIEPINT      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->dev_if->in_ep_regs[i]->dieptsiz;
+               DWC_PRINTF("DIETSIZ      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->dev_if->in_ep_regs[i]->diepdma;
+               DWC_PRINTF("DIEPDMA      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->dev_if->in_ep_regs[i]->dtxfsts;
+               DWC_PRINTF("DTXFSTS      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->dev_if->in_ep_regs[i]->diepdmab;
+               DWC_PRINTF("DIEPDMAB     @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, 0 /*DWC_READ_REG32(addr) */ );
+       }
+
+       for (i = 0; i <= core_if->dev_if->num_out_eps; i++) {
+               DWC_PRINTF("Device OUT EP %d Registers\n", i);
+               addr = &core_if->dev_if->out_ep_regs[i]->doepctl;
+               DWC_PRINTF("DOEPCTL      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->dev_if->out_ep_regs[i]->doepint;
+               DWC_PRINTF("DOEPINT      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->dev_if->out_ep_regs[i]->doeptsiz;
+               DWC_PRINTF("DOETSIZ      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->dev_if->out_ep_regs[i]->doepdma;
+               DWC_PRINTF("DOEPDMA      @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               if (core_if->dma_enable) {      /* Don't access this register in SLAVE mode */
+                       addr = &core_if->dev_if->out_ep_regs[i]->doepdmab;
+                       DWC_PRINTF("DOEPDMAB     @0x%08lX : 0x%08X\n",
+                                  (unsigned long)addr, DWC_READ_REG32(addr));
+               }
+
+       }
+}
+
+/**
+ * This functions reads the SPRAM and prints its content
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+void dwc_otg_dump_spram(dwc_otg_core_if_t * core_if)
+{
+       volatile uint8_t *addr, *start_addr, *end_addr;
+
+       DWC_PRINTF("SPRAM Data:\n");
+       start_addr = (void *)core_if->core_global_regs;
+       DWC_PRINTF("Base Address: 0x%8lX\n", (unsigned long)start_addr);
+       start_addr += 0x00028000;
+       end_addr = (void *)core_if->core_global_regs;
+       end_addr += 0x000280e0;
+
+       for (addr = start_addr; addr < end_addr; addr += 16) {
+               DWC_PRINTF
+                   ("0x%8lX:\t%2X %2X %2X %2X %2X %2X %2X %2X %2X %2X %2X %2X %2X %2X %2X %2X\n",
+                    (unsigned long)addr, addr[0], addr[1], addr[2], addr[3],
+                    addr[4], addr[5], addr[6], addr[7], addr[8], addr[9],
+                    addr[10], addr[11], addr[12], addr[13], addr[14], addr[15]
+                   );
+       }
+
+       return;
+}
+
+/**
+ * This function reads the host registers and prints them
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+void dwc_otg_dump_host_registers(dwc_otg_core_if_t * core_if)
+{
+       int i;
+       volatile uint32_t *addr;
+
+       DWC_PRINTF("Host Global Registers\n");
+       addr = &core_if->host_if->host_global_regs->hcfg;
+       DWC_PRINTF("HCFG                 @0x%08lX : 0x%08X\n",
+                  (unsigned long)addr, DWC_READ_REG32(addr));
+       addr = &core_if->host_if->host_global_regs->hfir;
+       DWC_PRINTF("HFIR                 @0x%08lX : 0x%08X\n",
+                  (unsigned long)addr, DWC_READ_REG32(addr));
+       addr = &core_if->host_if->host_global_regs->hfnum;
+       DWC_PRINTF("HFNUM        @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->host_if->host_global_regs->hptxsts;
+       DWC_PRINTF("HPTXSTS      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->host_if->host_global_regs->haint;
+       DWC_PRINTF("HAINT        @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->host_if->host_global_regs->haintmsk;
+       DWC_PRINTF("HAINTMSK     @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       if (core_if->dma_desc_enable) {
+               addr = &core_if->host_if->host_global_regs->hflbaddr;
+               DWC_PRINTF("HFLBADDR     @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+       }
+
+       addr = core_if->host_if->hprt0;
+       DWC_PRINTF("HPRT0        @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+
+       for (i = 0; i < core_if->core_params->host_channels; i++) {
+               DWC_PRINTF("Host Channel %d Specific Registers\n", i);
+               addr = &core_if->host_if->hc_regs[i]->hcchar;
+               DWC_PRINTF("HCCHAR       @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->host_if->hc_regs[i]->hcsplt;
+               DWC_PRINTF("HCSPLT       @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->host_if->hc_regs[i]->hcint;
+               DWC_PRINTF("HCINT        @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->host_if->hc_regs[i]->hcintmsk;
+               DWC_PRINTF("HCINTMSK     @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->host_if->hc_regs[i]->hctsiz;
+               DWC_PRINTF("HCTSIZ       @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               addr = &core_if->host_if->hc_regs[i]->hcdma;
+               DWC_PRINTF("HCDMA        @0x%08lX : 0x%08X\n",
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+               if (core_if->dma_desc_enable) {
+                       addr = &core_if->host_if->hc_regs[i]->hcdmab;
+                       DWC_PRINTF("HCDMAB       @0x%08lX : 0x%08X\n",
+                                  (unsigned long)addr, DWC_READ_REG32(addr));
+               }
+
+       }
+       return;
+}
+
+/**
+ * This function reads the core global registers and prints them
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+void dwc_otg_dump_global_registers(dwc_otg_core_if_t * core_if)
+{
+       int i, ep_num;
+       volatile uint32_t *addr;
+       char *txfsiz;
+
+       DWC_PRINTF("Core Global Registers\n");
+       addr = &core_if->core_global_regs->gotgctl;
+       DWC_PRINTF("GOTGCTL      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gotgint;
+       DWC_PRINTF("GOTGINT      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gahbcfg;
+       DWC_PRINTF("GAHBCFG      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gusbcfg;
+       DWC_PRINTF("GUSBCFG      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->grstctl;
+       DWC_PRINTF("GRSTCTL      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gintsts;
+       DWC_PRINTF("GINTSTS      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gintmsk;
+       DWC_PRINTF("GINTMSK      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->grxstsr;
+       DWC_PRINTF("GRXSTSR      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->grxfsiz;
+       DWC_PRINTF("GRXFSIZ      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gnptxfsiz;
+       DWC_PRINTF("GNPTXFSIZ @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gnptxsts;
+       DWC_PRINTF("GNPTXSTS     @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gi2cctl;
+       DWC_PRINTF("GI2CCTL      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gpvndctl;
+       DWC_PRINTF("GPVNDCTL     @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->ggpio;
+       DWC_PRINTF("GGPIO        @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->guid;
+       DWC_PRINTF("GUID                 @0x%08lX : 0x%08X\n",
+                  (unsigned long)addr, DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gsnpsid;
+       DWC_PRINTF("GSNPSID      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->ghwcfg1;
+       DWC_PRINTF("GHWCFG1      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->ghwcfg2;
+       DWC_PRINTF("GHWCFG2      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->ghwcfg3;
+       DWC_PRINTF("GHWCFG3      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->ghwcfg4;
+       DWC_PRINTF("GHWCFG4      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->glpmcfg;
+       DWC_PRINTF("GLPMCFG      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gpwrdn;
+       DWC_PRINTF("GPWRDN       @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->gdfifocfg;
+       DWC_PRINTF("GDFIFOCFG    @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+       addr = &core_if->core_global_regs->adpctl;
+       DWC_PRINTF("ADPCTL       @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  dwc_otg_adp_read_reg(core_if));
+       addr = &core_if->core_global_regs->hptxfsiz;
+       DWC_PRINTF("HPTXFSIZ     @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+
+       if (core_if->en_multiple_tx_fifo == 0) {
+               ep_num = core_if->hwcfg4.b.num_dev_perio_in_ep;
+               txfsiz = "DPTXFSIZ";
+       } else {
+               ep_num = core_if->hwcfg4.b.num_in_eps;
+               txfsiz = "DIENPTXF";
+       }
+       for (i = 0; i < ep_num; i++) {
+               addr = &core_if->core_global_regs->dtxfsiz[i];
+               DWC_PRINTF("%s[%d] @0x%08lX : 0x%08X\n", txfsiz, i + 1,
+                          (unsigned long)addr, DWC_READ_REG32(addr));
+       }
+       addr = core_if->pcgcctl;
+       DWC_PRINTF("PCGCCTL      @0x%08lX : 0x%08X\n", (unsigned long)addr,
+                  DWC_READ_REG32(addr));
+}
+
+/**
+ * Flush a Tx FIFO.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param num Tx FIFO to flush.
+ */
+void dwc_otg_flush_tx_fifo(dwc_otg_core_if_t * core_if, const int num)
+{
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       volatile grstctl_t greset = {.d32 = 0 };
+       int count = 0;
+
+       DWC_DEBUGPL((DBG_CIL | DBG_PCDV), "Flush Tx FIFO %d\n", num);
+
+       greset.b.txfflsh = 1;
+       greset.b.txfnum = num;
+       DWC_WRITE_REG32(&global_regs->grstctl, greset.d32);
+
+       do {
+               greset.d32 = DWC_READ_REG32(&global_regs->grstctl);
+               if (++count > 10000) {
+                       DWC_WARN("%s() HANG! GRSTCTL=%0x GNPTXSTS=0x%08x\n",
+                                __func__, greset.d32,
+                                DWC_READ_REG32(&global_regs->gnptxsts));
+                       break;
+               }
+               dwc_udelay(1);
+       } while (greset.b.txfflsh == 1);
+
+       /* Wait for 3 PHY Clocks */
+       dwc_udelay(1);
+}
+
+/**
+ * Flush Rx FIFO.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+void dwc_otg_flush_rx_fifo(dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       volatile grstctl_t greset = {.d32 = 0 };
+       int count = 0;
+
+       DWC_DEBUGPL((DBG_CIL | DBG_PCDV), "%s\n", __func__);
+       /*
+        *
+        */
+       greset.b.rxfflsh = 1;
+       DWC_WRITE_REG32(&global_regs->grstctl, greset.d32);
+
+       do {
+               greset.d32 = DWC_READ_REG32(&global_regs->grstctl);
+               if (++count > 10000) {
+                       DWC_WARN("%s() HANG! GRSTCTL=%0x\n", __func__,
+                                greset.d32);
+                       break;
+               }
+               dwc_udelay(1);
+       } while (greset.b.rxfflsh == 1);
+
+       /* Wait for 3 PHY Clocks */
+       dwc_udelay(1);
+}
+
+/**
+ * Do core a soft reset of the core.  Be careful with this because it
+ * resets all the internal state machines of the core.
+ */
+void dwc_otg_core_reset(dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       volatile grstctl_t greset = {.d32 = 0 };
+       int count = 0;
+
+       DWC_DEBUGPL(DBG_CILV, "%s\n", __func__);
+       /* Wait for AHB master IDLE state. */
+       do {
+               dwc_udelay(10);
+               greset.d32 = DWC_READ_REG32(&global_regs->grstctl);
+               if (++count > 100000) {
+                       DWC_WARN("%s() HANG! AHB Idle GRSTCTL=%0x\n", __func__,
+                                greset.d32);
+                       return;
+               }
+       }
+       while (greset.b.ahbidle == 0);
+
+       /* Core Soft Reset */
+       count = 0;
+       greset.b.csftrst = 1;
+       DWC_WRITE_REG32(&global_regs->grstctl, greset.d32);
+       do {
+               greset.d32 = DWC_READ_REG32(&global_regs->grstctl);
+               if (++count > 10000) {
+                       DWC_WARN("%s() HANG! Soft Reset GRSTCTL=%0x\n",
+                                __func__, greset.d32);
+                       break;
+               }
+               dwc_udelay(1);
+       }
+       while (greset.b.csftrst == 1);
+
+       /* Wait for 3 PHY Clocks */
+       dwc_mdelay(100);
+}
+
+uint8_t dwc_otg_is_device_mode(dwc_otg_core_if_t * _core_if)
+{
+       return (dwc_otg_mode(_core_if) != DWC_HOST_MODE);
+}
+
+uint8_t dwc_otg_is_host_mode(dwc_otg_core_if_t * _core_if)
+{
+       return (dwc_otg_mode(_core_if) == DWC_HOST_MODE);
+}
+
+/**
+ * Register HCD callbacks. The callbacks are used to start and stop
+ * the HCD for interrupt processing.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param cb the HCD callback structure.
+ * @param p pointer to be passed to callback function (usb_hcd*).
+ */
+void dwc_otg_cil_register_hcd_callbacks(dwc_otg_core_if_t * core_if,
+                                       dwc_otg_cil_callbacks_t * cb, void *p)
+{
+       core_if->hcd_cb = cb;
+       cb->p = p;
+}
+
+/**
+ * Register PCD callbacks. The callbacks are used to start and stop
+ * the PCD for interrupt processing.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param cb the PCD callback structure.
+ * @param p pointer to be passed to callback function (pcd*).
+ */
+void dwc_otg_cil_register_pcd_callbacks(dwc_otg_core_if_t * core_if,
+                                       dwc_otg_cil_callbacks_t * cb, void *p)
+{
+       core_if->pcd_cb = cb;
+       cb->p = p;
+}
+
+#ifdef DWC_EN_ISOC
+
+/**
+ * This function writes isoc data per 1 (micro)frame into tx fifo
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ *
+ */
+void write_isoc_frame_data(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       dwc_otg_dev_in_ep_regs_t *ep_regs;
+       dtxfsts_data_t txstatus = {.d32 = 0 };
+       uint32_t len = 0;
+       uint32_t dwords;
+
+       ep->xfer_len = ep->data_per_frame;
+       ep->xfer_count = 0;
+
+       ep_regs = core_if->dev_if->in_ep_regs[ep->num];
+
+       len = ep->xfer_len - ep->xfer_count;
+
+       if (len > ep->maxpacket) {
+               len = ep->maxpacket;
+       }
+
+       dwords = (len + 3) / 4;
+
+       /* While there is space in the queue and space in the FIFO and
+        * More data to tranfer, Write packets to the Tx FIFO */
+       txstatus.d32 =
+           DWC_READ_REG32(&core_if->dev_if->in_ep_regs[ep->num]->dtxfsts);
+       DWC_DEBUGPL(DBG_PCDV, "b4 dtxfsts[%d]=0x%08x\n", ep->num, txstatus.d32);
+
+       while (txstatus.b.txfspcavail > dwords &&
+              ep->xfer_count < ep->xfer_len && ep->xfer_len != 0) {
+               /* Write the FIFO */
+               dwc_otg_ep_write_packet(core_if, ep, 0);
+
+               len = ep->xfer_len - ep->xfer_count;
+               if (len > ep->maxpacket) {
+                       len = ep->maxpacket;
+               }
+
+               dwords = (len + 3) / 4;
+               txstatus.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->in_ep_regs[ep->num]->
+                                  dtxfsts);
+               DWC_DEBUGPL(DBG_PCDV, "dtxfsts[%d]=0x%08x\n", ep->num,
+                           txstatus.d32);
+       }
+}
+
+/**
+ * This function initializes a descriptor chain for Isochronous transfer
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ *
+ */
+void dwc_otg_iso_ep_start_frm_transfer(dwc_otg_core_if_t * core_if,
+                                      dwc_ep_t * ep)
+{
+       deptsiz_data_t deptsiz = {.d32 = 0 };
+       depctl_data_t depctl = {.d32 = 0 };
+       dsts_data_t dsts = {.d32 = 0 };
+       volatile uint32_t *addr;
+
+       if (ep->is_in) {
+               addr = &core_if->dev_if->in_ep_regs[ep->num]->diepctl;
+       } else {
+               addr = &core_if->dev_if->out_ep_regs[ep->num]->doepctl;
+       }
+
+       ep->xfer_len = ep->data_per_frame;
+       ep->xfer_count = 0;
+       ep->xfer_buff = ep->cur_pkt_addr;
+       ep->dma_addr = ep->cur_pkt_dma_addr;
+
+       if (ep->is_in) {
+               /* Program the transfer size and packet count
+                *      as follows: xfersize = N * maxpacket +
+                *      short_packet pktcnt = N + (short_packet
+                *      exist ? 1 : 0)
+                */
+               deptsiz.b.xfersize = ep->xfer_len;
+               deptsiz.b.pktcnt =
+                   (ep->xfer_len - 1 + ep->maxpacket) / ep->maxpacket;
+               deptsiz.b.mc = deptsiz.b.pktcnt;
+               DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[ep->num]->dieptsiz,
+                               deptsiz.d32);
+
+               /* Write the DMA register */
+               if (core_if->dma_enable) {
+                       DWC_WRITE_REG32(&
+                                       (core_if->dev_if->in_ep_regs[ep->num]->
+                                        diepdma), (uint32_t) ep->dma_addr);
+               }
+       } else {
+               deptsiz.b.pktcnt =
+                   (ep->xfer_len + (ep->maxpacket - 1)) / ep->maxpacket;
+               deptsiz.b.xfersize = deptsiz.b.pktcnt * ep->maxpacket;
+
+               DWC_WRITE_REG32(&core_if->dev_if->
+                               out_ep_regs[ep->num]->doeptsiz, deptsiz.d32);
+
+               if (core_if->dma_enable) {
+                       DWC_WRITE_REG32(&
+                                       (core_if->dev_if->
+                                        out_ep_regs[ep->num]->doepdma),
+                                       (uint32_t) ep->dma_addr);
+               }
+       }
+
+       /** Enable endpoint, clear nak  */
+
+       depctl.d32 = 0;
+       if (ep->bInterval == 1) {
+               dsts.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
+               ep->next_frame = dsts.b.soffn + ep->bInterval;
+
+               if (ep->next_frame & 0x1) {
+                       depctl.b.setd1pid = 1;
+               } else {
+                       depctl.b.setd0pid = 1;
+               }
+       } else {
+               ep->next_frame += ep->bInterval;
+
+               if (ep->next_frame & 0x1) {
+                       depctl.b.setd1pid = 1;
+               } else {
+                       depctl.b.setd0pid = 1;
+               }
+       }
+       depctl.b.epena = 1;
+       depctl.b.cnak = 1;
+
+       DWC_MODIFY_REG32(addr, 0, depctl.d32);
+       depctl.d32 = DWC_READ_REG32(addr);
+
+       if (ep->is_in && core_if->dma_enable == 0) {
+               write_isoc_frame_data(core_if, ep);
+       }
+
+}
+#endif /* DWC_EN_ISOC */
+
+static void dwc_otg_set_uninitialized(int32_t * p, int size)
+{
+       int i;
+       for (i = 0; i < size; i++) {
+               p[i] = -1;
+       }
+}
+
+static int dwc_otg_param_initialized(int32_t val)
+{
+       return val != -1;
+}
+
+static int dwc_otg_setup_params(dwc_otg_core_if_t * core_if)
+{
+       int i;
+       core_if->core_params = DWC_ALLOC(sizeof(*core_if->core_params));
+       if (!core_if->core_params) {
+               return -DWC_E_NO_MEMORY;
+       }
+       dwc_otg_set_uninitialized((int32_t *) core_if->core_params,
+                                 sizeof(*core_if->core_params) /
+                                 sizeof(int32_t));
+       DWC_PRINTF("Setting default values for core params\n");
+       dwc_otg_set_param_otg_cap(core_if, dwc_param_otg_cap_default);
+       dwc_otg_set_param_dma_enable(core_if, dwc_param_dma_enable_default);
+       dwc_otg_set_param_dma_desc_enable(core_if,
+                                         dwc_param_dma_desc_enable_default);
+       dwc_otg_set_param_opt(core_if, dwc_param_opt_default);
+       dwc_otg_set_param_dma_burst_size(core_if,
+                                        dwc_param_dma_burst_size_default);
+       dwc_otg_set_param_host_support_fs_ls_low_power(core_if,
+                                                      dwc_param_host_support_fs_ls_low_power_default);
+       dwc_otg_set_param_enable_dynamic_fifo(core_if,
+                                             dwc_param_enable_dynamic_fifo_default);
+       dwc_otg_set_param_data_fifo_size(core_if,
+                                        dwc_param_data_fifo_size_default);
+       dwc_otg_set_param_dev_rx_fifo_size(core_if,
+                                          dwc_param_dev_rx_fifo_size_default);
+       dwc_otg_set_param_dev_nperio_tx_fifo_size(core_if,
+                                                 dwc_param_dev_nperio_tx_fifo_size_default);
+       dwc_otg_set_param_host_rx_fifo_size(core_if,
+                                           dwc_param_host_rx_fifo_size_default);
+       dwc_otg_set_param_host_nperio_tx_fifo_size(core_if,
+                                                  dwc_param_host_nperio_tx_fifo_size_default);
+       dwc_otg_set_param_host_perio_tx_fifo_size(core_if,
+                                                 dwc_param_host_perio_tx_fifo_size_default);
+       dwc_otg_set_param_max_transfer_size(core_if,
+                                           dwc_param_max_transfer_size_default);
+       dwc_otg_set_param_max_packet_count(core_if,
+                                          dwc_param_max_packet_count_default);
+       dwc_otg_set_param_host_channels(core_if,
+                                       dwc_param_host_channels_default);
+       dwc_otg_set_param_dev_endpoints(core_if,
+                                       dwc_param_dev_endpoints_default);
+       dwc_otg_set_param_phy_type(core_if, dwc_param_phy_type_default);
+       dwc_otg_set_param_speed(core_if, dwc_param_speed_default);
+       dwc_otg_set_param_host_ls_low_power_phy_clk(core_if,
+                                                   dwc_param_host_ls_low_power_phy_clk_default);
+       dwc_otg_set_param_phy_ulpi_ddr(core_if, dwc_param_phy_ulpi_ddr_default);
+       dwc_otg_set_param_phy_ulpi_ext_vbus(core_if,
+                                           dwc_param_phy_ulpi_ext_vbus_default);
+       dwc_otg_set_param_phy_utmi_width(core_if,
+                                        dwc_param_phy_utmi_width_default);
+       dwc_otg_set_param_ts_dline(core_if, dwc_param_ts_dline_default);
+       dwc_otg_set_param_i2c_enable(core_if, dwc_param_i2c_enable_default);
+       dwc_otg_set_param_ulpi_fs_ls(core_if, dwc_param_ulpi_fs_ls_default);
+       dwc_otg_set_param_en_multiple_tx_fifo(core_if,
+                                             dwc_param_en_multiple_tx_fifo_default);
+       for (i = 0; i < 15; i++) {
+               dwc_otg_set_param_dev_perio_tx_fifo_size(core_if,
+                                                        dwc_param_dev_perio_tx_fifo_size_default,
+                                                        i);
+       }
+
+       for (i = 0; i < 15; i++) {
+               dwc_otg_set_param_dev_tx_fifo_size(core_if,
+                                                  dwc_param_dev_tx_fifo_size_default,
+                                                  i);
+       }
+       dwc_otg_set_param_thr_ctl(core_if, dwc_param_thr_ctl_default);
+       dwc_otg_set_param_mpi_enable(core_if, dwc_param_mpi_enable_default);
+       dwc_otg_set_param_pti_enable(core_if, dwc_param_pti_enable_default);
+       dwc_otg_set_param_lpm_enable(core_if, dwc_param_lpm_enable_default);
+       dwc_otg_set_param_ic_usb_cap(core_if, dwc_param_ic_usb_cap_default);
+       dwc_otg_set_param_tx_thr_length(core_if,
+                                       dwc_param_tx_thr_length_default);
+       dwc_otg_set_param_rx_thr_length(core_if,
+                                       dwc_param_rx_thr_length_default);
+       dwc_otg_set_param_ahb_thr_ratio(core_if,
+                                       dwc_param_ahb_thr_ratio_default);
+       dwc_otg_set_param_power_down(core_if, dwc_param_power_down_default);
+       dwc_otg_set_param_reload_ctl(core_if, dwc_param_reload_ctl_default);
+       dwc_otg_set_param_dev_out_nak(core_if, dwc_param_dev_out_nak_default);
+       dwc_otg_set_param_cont_on_bna(core_if, dwc_param_cont_on_bna_default);
+       dwc_otg_set_param_ahb_single(core_if, dwc_param_ahb_single_default);
+       dwc_otg_set_param_otg_ver(core_if, dwc_param_otg_ver_default);
+       dwc_otg_set_param_adp_enable(core_if, dwc_param_adp_enable_default);
+       DWC_PRINTF("Finished setting default values for core params\n");
+
+       return 0;
+}
+
+uint8_t dwc_otg_is_dma_enable(dwc_otg_core_if_t * core_if)
+{
+       return core_if->dma_enable;
+}
+
+/* Checks if the parameter is outside of its valid range of values */
+#define DWC_OTG_PARAM_TEST(_param_, _low_, _high_) \
+               (((_param_) < (_low_)) || \
+               ((_param_) > (_high_)))
+
+/* Parameter access functions */
+int dwc_otg_set_param_otg_cap(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int valid;
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 2)) {
+               DWC_WARN("Wrong value for otg_cap parameter\n");
+               DWC_WARN("otg_cap parameter must be 0,1 or 2\n");
+               retval = -DWC_E_INVALID;
+               goto out;
+       }
+
+       valid = 1;
+       switch (val) {
+       case DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE:
+               if (core_if->hwcfg2.b.op_mode !=
+                   DWC_HWCFG2_OP_MODE_HNP_SRP_CAPABLE_OTG)
+                       valid = 0;
+               break;
+       case DWC_OTG_CAP_PARAM_SRP_ONLY_CAPABLE:
+               if ((core_if->hwcfg2.b.op_mode !=
+                    DWC_HWCFG2_OP_MODE_HNP_SRP_CAPABLE_OTG)
+                   && (core_if->hwcfg2.b.op_mode !=
+                       DWC_HWCFG2_OP_MODE_SRP_ONLY_CAPABLE_OTG)
+                   && (core_if->hwcfg2.b.op_mode !=
+                       DWC_HWCFG2_OP_MODE_SRP_CAPABLE_DEVICE)
+                   && (core_if->hwcfg2.b.op_mode !=
+                       DWC_HWCFG2_OP_MODE_SRP_CAPABLE_HOST)) {
+                       valid = 0;
+               }
+               break;
+       case DWC_OTG_CAP_PARAM_NO_HNP_SRP_CAPABLE:
+               /* always valid */
+               break;
+       }
+       if (!valid) {
+               if (dwc_otg_param_initialized(core_if->core_params->otg_cap)) {
+                       DWC_ERROR
+                           ("%d invalid for otg_cap paremter. Check HW configuration.\n",
+                            val);
+               }
+               val =
+                   (((core_if->hwcfg2.b.op_mode ==
+                      DWC_HWCFG2_OP_MODE_HNP_SRP_CAPABLE_OTG)
+                     || (core_if->hwcfg2.b.op_mode ==
+                         DWC_HWCFG2_OP_MODE_SRP_ONLY_CAPABLE_OTG)
+                     || (core_if->hwcfg2.b.op_mode ==
+                         DWC_HWCFG2_OP_MODE_SRP_CAPABLE_DEVICE)
+                     || (core_if->hwcfg2.b.op_mode ==
+                         DWC_HWCFG2_OP_MODE_SRP_CAPABLE_HOST)) ?
+                    DWC_OTG_CAP_PARAM_SRP_ONLY_CAPABLE :
+                    DWC_OTG_CAP_PARAM_NO_HNP_SRP_CAPABLE);
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->otg_cap = val;
+out:
+       return retval;
+}
+
+int32_t dwc_otg_get_param_otg_cap(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->otg_cap;
+}
+
+int dwc_otg_set_param_opt(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong value for opt parameter\n");
+               return -DWC_E_INVALID;
+       }
+       core_if->core_params->opt = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_opt(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->opt;
+}
+
+int dwc_otg_set_param_dma_enable(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong value for dma enable\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val == 1) && (core_if->hwcfg2.b.architecture == 0)) {
+               if (dwc_otg_param_initialized(core_if->core_params->dma_enable)) {
+                       DWC_ERROR
+                           ("%d invalid for dma_enable paremter. Check HW configuration.\n",
+                            val);
+               }
+               val = 0;
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->dma_enable = val;
+       if (val == 0) {
+               dwc_otg_set_param_dma_desc_enable(core_if, 0);
+       }
+       return retval;
+}
+
+int32_t dwc_otg_get_param_dma_enable(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->dma_enable;
+}
+
+int dwc_otg_set_param_dma_desc_enable(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong value for dma_enable\n");
+               DWC_WARN("dma_desc_enable must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val == 1)
+           && ((dwc_otg_get_param_dma_enable(core_if) == 0)
+               || (core_if->hwcfg4.b.desc_dma == 0))) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->dma_desc_enable)) {
+                       DWC_ERROR
+                           ("%d invalid for dma_desc_enable paremter. Check HW configuration.\n",
+                            val);
+               }
+               val = 0;
+               retval = -DWC_E_INVALID;
+       }
+       core_if->core_params->dma_desc_enable = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_dma_desc_enable(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->dma_desc_enable;
+}
+
+int dwc_otg_set_param_host_support_fs_ls_low_power(dwc_otg_core_if_t * core_if,
+                                                  int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong value for host_support_fs_low_power\n");
+               DWC_WARN("host_support_fs_low_power must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+       core_if->core_params->host_support_fs_ls_low_power = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_host_support_fs_ls_low_power(dwc_otg_core_if_t *
+                                                      core_if)
+{
+       return core_if->core_params->host_support_fs_ls_low_power;
+}
+
+int dwc_otg_set_param_enable_dynamic_fifo(dwc_otg_core_if_t * core_if,
+                                         int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong value for enable_dynamic_fifo\n");
+               DWC_WARN("enable_dynamic_fifo must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val == 1) && (core_if->hwcfg2.b.dynamic_fifo == 0)) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->enable_dynamic_fifo)) {
+                       DWC_ERROR
+                           ("%d invalid for enable_dynamic_fifo paremter. Check HW configuration.\n",
+                            val);
+               }
+               val = 0;
+               retval = -DWC_E_INVALID;
+       }
+       core_if->core_params->enable_dynamic_fifo = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_enable_dynamic_fifo(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->enable_dynamic_fifo;
+}
+
+int dwc_otg_set_param_data_fifo_size(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 32, 32768)) {
+               DWC_WARN("Wrong value for data_fifo_size\n");
+               DWC_WARN("data_fifo_size must be 32-32768\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val > core_if->hwcfg3.b.dfifo_depth) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->data_fifo_size)) {
+                       DWC_ERROR
+                           ("%d invalid for data_fifo_size parameter. Check HW configuration.\n",
+                            val);
+               }
+               val = core_if->hwcfg3.b.dfifo_depth;
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->data_fifo_size = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_data_fifo_size(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->data_fifo_size;
+}
+
+int dwc_otg_set_param_dev_rx_fifo_size(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 16, 32768)) {
+               DWC_WARN("Wrong value for dev_rx_fifo_size\n");
+               DWC_WARN("dev_rx_fifo_size must be 16-32768\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val > DWC_READ_REG32(&core_if->core_global_regs->grxfsiz)) {
+               if (dwc_otg_param_initialized(core_if->core_params->dev_rx_fifo_size)) {
+               DWC_WARN("%d invalid for dev_rx_fifo_size parameter\n", val);
+               }
+               val = DWC_READ_REG32(&core_if->core_global_regs->grxfsiz);
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->dev_rx_fifo_size = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_dev_rx_fifo_size(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->dev_rx_fifo_size;
+}
+
+int dwc_otg_set_param_dev_nperio_tx_fifo_size(dwc_otg_core_if_t * core_if,
+                                             int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 16, 32768)) {
+               DWC_WARN("Wrong value for dev_nperio_tx_fifo\n");
+               DWC_WARN("dev_nperio_tx_fifo must be 16-32768\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val > (DWC_READ_REG32(&core_if->core_global_regs->gnptxfsiz) >> 16)) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->dev_nperio_tx_fifo_size)) {
+                       DWC_ERROR
+                           ("%d invalid for dev_nperio_tx_fifo_size. Check HW configuration.\n",
+                            val);
+               }
+               val =
+                   (DWC_READ_REG32(&core_if->core_global_regs->gnptxfsiz) >>
+                    16);
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->dev_nperio_tx_fifo_size = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_dev_nperio_tx_fifo_size(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->dev_nperio_tx_fifo_size;
+}
+
+int dwc_otg_set_param_host_rx_fifo_size(dwc_otg_core_if_t * core_if,
+                                       int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 16, 32768)) {
+               DWC_WARN("Wrong value for host_rx_fifo_size\n");
+               DWC_WARN("host_rx_fifo_size must be 16-32768\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val > DWC_READ_REG32(&core_if->core_global_regs->grxfsiz)) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->host_rx_fifo_size)) {
+                       DWC_ERROR
+                           ("%d invalid for host_rx_fifo_size. Check HW configuration.\n",
+                            val);
+               }
+               val = DWC_READ_REG32(&core_if->core_global_regs->grxfsiz);
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->host_rx_fifo_size = val;
+       return retval;
+
+}
+
+int32_t dwc_otg_get_param_host_rx_fifo_size(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->host_rx_fifo_size;
+}
+
+int dwc_otg_set_param_host_nperio_tx_fifo_size(dwc_otg_core_if_t * core_if,
+                                              int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 16, 32768)) {
+               DWC_WARN("Wrong value for host_nperio_tx_fifo_size\n");
+               DWC_WARN("host_nperio_tx_fifo_size must be 16-32768\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val > (DWC_READ_REG32(&core_if->core_global_regs->gnptxfsiz) >> 16)) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->host_nperio_tx_fifo_size)) {
+                       DWC_ERROR
+                           ("%d invalid for host_nperio_tx_fifo_size. Check HW configuration.\n",
+                            val);
+               }
+               val =
+                   (DWC_READ_REG32(&core_if->core_global_regs->gnptxfsiz) >>
+                    16);
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->host_nperio_tx_fifo_size = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_host_nperio_tx_fifo_size(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->host_nperio_tx_fifo_size;
+}
+
+int dwc_otg_set_param_host_perio_tx_fifo_size(dwc_otg_core_if_t * core_if,
+                                             int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 16, 32768)) {
+               DWC_WARN("Wrong value for host_perio_tx_fifo_size\n");
+               DWC_WARN("host_perio_tx_fifo_size must be 16-32768\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val > ((core_if->hptxfsiz.d32) >> 16)) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->host_perio_tx_fifo_size)) {
+                       DWC_ERROR
+                           ("%d invalid for host_perio_tx_fifo_size. Check HW configuration.\n",
+                            val);
+               }
+               val = (core_if->hptxfsiz.d32) >> 16;
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->host_perio_tx_fifo_size = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_host_perio_tx_fifo_size(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->host_perio_tx_fifo_size;
+}
+
+int dwc_otg_set_param_max_transfer_size(dwc_otg_core_if_t * core_if,
+                                       int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 2047, 524288)) {
+               DWC_WARN("Wrong value for max_transfer_size\n");
+               DWC_WARN("max_transfer_size must be 2047-524288\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val >= (1 << (core_if->hwcfg3.b.xfer_size_cntr_width + 11))) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->max_transfer_size)) {
+                       DWC_ERROR
+                           ("%d invalid for max_transfer_size. Check HW configuration.\n",
+                            val);
+               }
+               val =
+                   ((1 << (core_if->hwcfg3.b.packet_size_cntr_width + 11)) -
+                    1);
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->max_transfer_size = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_max_transfer_size(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->max_transfer_size;
+}
+
+int dwc_otg_set_param_max_packet_count(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 15, 511)) {
+               DWC_WARN("Wrong value for max_packet_count\n");
+               DWC_WARN("max_packet_count must be 15-511\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val > (1 << (core_if->hwcfg3.b.packet_size_cntr_width + 4))) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->max_packet_count)) {
+                       DWC_ERROR
+                           ("%d invalid for max_packet_count. Check HW configuration.\n",
+                            val);
+               }
+               val =
+                   ((1 << (core_if->hwcfg3.b.packet_size_cntr_width + 4)) - 1);
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->max_packet_count = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_max_packet_count(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->max_packet_count;
+}
+
+int dwc_otg_set_param_host_channels(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 1, 16)) {
+               DWC_WARN("Wrong value for host_channels\n");
+               DWC_WARN("host_channels must be 1-16\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val > (core_if->hwcfg2.b.num_host_chan + 1)) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->host_channels)) {
+                       DWC_ERROR
+                           ("%d invalid for host_channels. Check HW configurations.\n",
+                            val);
+               }
+               val = (core_if->hwcfg2.b.num_host_chan + 1);
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->host_channels = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_host_channels(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->host_channels;
+}
+
+int dwc_otg_set_param_dev_endpoints(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 1, 15)) {
+               DWC_WARN("Wrong value for dev_endpoints\n");
+               DWC_WARN("dev_endpoints must be 1-15\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val > (core_if->hwcfg2.b.num_dev_ep)) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->dev_endpoints)) {
+                       DWC_ERROR
+                           ("%d invalid for dev_endpoints. Check HW configurations.\n",
+                            val);
+               }
+               val = core_if->hwcfg2.b.num_dev_ep;
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->dev_endpoints = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_dev_endpoints(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->dev_endpoints;
+}
+
+int dwc_otg_set_param_phy_type(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       int valid = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 2)) {
+               DWC_WARN("Wrong value for phy_type\n");
+               DWC_WARN("phy_type must be 0,1 or 2\n");
+               return -DWC_E_INVALID;
+       }
+#ifndef NO_FS_PHY_HW_CHECKS
+       if ((val == DWC_PHY_TYPE_PARAM_UTMI) &&
+           ((core_if->hwcfg2.b.hs_phy_type == 1) ||
+            (core_if->hwcfg2.b.hs_phy_type == 3))) {
+               valid = 1;
+       } else if ((val == DWC_PHY_TYPE_PARAM_ULPI) &&
+                  ((core_if->hwcfg2.b.hs_phy_type == 2) ||
+                   (core_if->hwcfg2.b.hs_phy_type == 3))) {
+               valid = 1;
+       } else if ((val == DWC_PHY_TYPE_PARAM_FS) &&
+                  (core_if->hwcfg2.b.fs_phy_type == 1)) {
+               valid = 1;
+       }
+       if (!valid) {
+               if (dwc_otg_param_initialized(core_if->core_params->phy_type)) {
+                       DWC_ERROR
+                           ("%d invalid for phy_type. Check HW configurations.\n",
+                            val);
+               }
+               if (core_if->hwcfg2.b.hs_phy_type) {
+                       if ((core_if->hwcfg2.b.hs_phy_type == 3) ||
+                           (core_if->hwcfg2.b.hs_phy_type == 1)) {
+                               val = DWC_PHY_TYPE_PARAM_UTMI;
+                       } else {
+                               val = DWC_PHY_TYPE_PARAM_ULPI;
+                       }
+               }
+               retval = -DWC_E_INVALID;
+       }
+#endif
+       core_if->core_params->phy_type = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_phy_type(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->phy_type;
+}
+
+int dwc_otg_set_param_speed(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong value for speed parameter\n");
+               DWC_WARN("max_speed parameter must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+       if ((val == 0)
+           && dwc_otg_get_param_phy_type(core_if) == DWC_PHY_TYPE_PARAM_FS) {
+               if (dwc_otg_param_initialized(core_if->core_params->speed)) {
+                       DWC_ERROR
+                           ("%d invalid for speed paremter. Check HW configuration.\n",
+                            val);
+               }
+               val =
+                   (dwc_otg_get_param_phy_type(core_if) ==
+                    DWC_PHY_TYPE_PARAM_FS ? 1 : 0);
+               retval = -DWC_E_INVALID;
+       }
+       core_if->core_params->speed = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_speed(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->speed;
+}
+
+int dwc_otg_set_param_host_ls_low_power_phy_clk(dwc_otg_core_if_t * core_if,
+                                               int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN
+                   ("Wrong value for host_ls_low_power_phy_clk parameter\n");
+               DWC_WARN("host_ls_low_power_phy_clk must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val == DWC_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ)
+           && (dwc_otg_get_param_phy_type(core_if) == DWC_PHY_TYPE_PARAM_FS)) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->host_ls_low_power_phy_clk)) {
+                       DWC_ERROR
+                           ("%d invalid for host_ls_low_power_phy_clk. Check HW configuration.\n",
+                            val);
+               }
+               val =
+                   (dwc_otg_get_param_phy_type(core_if) ==
+                    DWC_PHY_TYPE_PARAM_FS) ?
+                   DWC_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ :
+                   DWC_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ;
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->host_ls_low_power_phy_clk = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_host_ls_low_power_phy_clk(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->host_ls_low_power_phy_clk;
+}
+
+int dwc_otg_set_param_phy_ulpi_ddr(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong value for phy_ulpi_ddr\n");
+               DWC_WARN("phy_upli_ddr must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       core_if->core_params->phy_ulpi_ddr = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_phy_ulpi_ddr(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->phy_ulpi_ddr;
+}
+
+int dwc_otg_set_param_phy_ulpi_ext_vbus(dwc_otg_core_if_t * core_if,
+                                       int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong valaue for phy_ulpi_ext_vbus\n");
+               DWC_WARN("phy_ulpi_ext_vbus must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       core_if->core_params->phy_ulpi_ext_vbus = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_phy_ulpi_ext_vbus(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->phy_ulpi_ext_vbus;
+}
+
+int dwc_otg_set_param_phy_utmi_width(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 8, 8) && DWC_OTG_PARAM_TEST(val, 16, 16)) {
+               DWC_WARN("Wrong valaue for phy_utmi_width\n");
+               DWC_WARN("phy_utmi_width must be 8 or 16\n");
+               return -DWC_E_INVALID;
+       }
+
+       core_if->core_params->phy_utmi_width = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_phy_utmi_width(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->phy_utmi_width;
+}
+
+int dwc_otg_set_param_ulpi_fs_ls(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong valaue for ulpi_fs_ls\n");
+               DWC_WARN("ulpi_fs_ls must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       core_if->core_params->ulpi_fs_ls = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_ulpi_fs_ls(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->ulpi_fs_ls;
+}
+
+int dwc_otg_set_param_ts_dline(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong valaue for ts_dline\n");
+               DWC_WARN("ts_dline must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       core_if->core_params->ts_dline = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_ts_dline(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->ts_dline;
+}
+
+int dwc_otg_set_param_i2c_enable(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong valaue for i2c_enable\n");
+               DWC_WARN("i2c_enable must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+#ifndef NO_FS_PHY_HW_CHECK
+       if (val == 1 && core_if->hwcfg3.b.i2c == 0) {
+               if (dwc_otg_param_initialized(core_if->core_params->i2c_enable)) {
+                       DWC_ERROR
+                           ("%d invalid for i2c_enable. Check HW configuration.\n",
+                            val);
+               }
+               val = 0;
+               retval = -DWC_E_INVALID;
+       }
+#endif
+
+       core_if->core_params->i2c_enable = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_i2c_enable(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->i2c_enable;
+}
+
+int dwc_otg_set_param_dev_perio_tx_fifo_size(dwc_otg_core_if_t * core_if,
+                                            int32_t val, int fifo_num)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 4, 768)) {
+               DWC_WARN("Wrong value for dev_perio_tx_fifo_size\n");
+               DWC_WARN("dev_perio_tx_fifo_size must be 4-768\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val >
+           (DWC_READ_REG32(&core_if->core_global_regs->dtxfsiz[fifo_num]))) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->dev_perio_tx_fifo_size[fifo_num])) {
+                       DWC_ERROR
+                           ("`%d' invalid for parameter `dev_perio_fifo_size_%d'. Check HW configuration.\n",
+                            val, fifo_num);
+               }
+               val = (DWC_READ_REG32(&core_if->core_global_regs->dtxfsiz[fifo_num]));
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->dev_perio_tx_fifo_size[fifo_num] = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_dev_perio_tx_fifo_size(dwc_otg_core_if_t * core_if,
+                                                int fifo_num)
+{
+       return core_if->core_params->dev_perio_tx_fifo_size[fifo_num];
+}
+
+int dwc_otg_set_param_en_multiple_tx_fifo(dwc_otg_core_if_t * core_if,
+                                         int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong valaue for en_multiple_tx_fifo,\n");
+               DWC_WARN("en_multiple_tx_fifo must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val == 1 && core_if->hwcfg4.b.ded_fifo_en == 0) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->en_multiple_tx_fifo)) {
+                       DWC_ERROR
+                           ("%d invalid for parameter en_multiple_tx_fifo. Check HW configuration.\n",
+                            val);
+               }
+               val = 0;
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->en_multiple_tx_fifo = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_en_multiple_tx_fifo(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->en_multiple_tx_fifo;
+}
+
+int dwc_otg_set_param_dev_tx_fifo_size(dwc_otg_core_if_t * core_if, int32_t val,
+                                      int fifo_num)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 4, 768)) {
+               DWC_WARN("Wrong value for dev_tx_fifo_size\n");
+               DWC_WARN("dev_tx_fifo_size must be 4-768\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val >
+           (DWC_READ_REG32(&core_if->core_global_regs->dtxfsiz[fifo_num]))) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->dev_tx_fifo_size[fifo_num])) {
+                       DWC_ERROR
+                           ("`%d' invalid for parameter `dev_tx_fifo_size_%d'. Check HW configuration.\n",
+                            val, fifo_num);
+               }
+               val = (DWC_READ_REG32(&core_if->core_global_regs->dtxfsiz[fifo_num]));
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->dev_tx_fifo_size[fifo_num] = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_dev_tx_fifo_size(dwc_otg_core_if_t * core_if,
+                                          int fifo_num)
+{
+       return core_if->core_params->dev_tx_fifo_size[fifo_num];
+}
+
+int dwc_otg_set_param_thr_ctl(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 7)) {
+               DWC_WARN("Wrong value for thr_ctl\n");
+               DWC_WARN("thr_ctl must be 0-7\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val != 0) &&
+           (!dwc_otg_get_param_dma_enable(core_if) ||
+            !core_if->hwcfg4.b.ded_fifo_en)) {
+               if (dwc_otg_param_initialized(core_if->core_params->thr_ctl)) {
+                       DWC_ERROR
+                           ("%d invalid for parameter thr_ctl. Check HW configuration.\n",
+                            val);
+               }
+               val = 0;
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->thr_ctl = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_thr_ctl(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->thr_ctl;
+}
+
+int dwc_otg_set_param_lpm_enable(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("Wrong value for lpm_enable\n");
+               DWC_WARN("lpm_enable must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val && !core_if->hwcfg3.b.otg_lpm_en) {
+               if (dwc_otg_param_initialized(core_if->core_params->lpm_enable)) {
+                       DWC_ERROR
+                           ("%d invalid for parameter lpm_enable. Check HW configuration.\n",
+                            val);
+               }
+               val = 0;
+               retval = -DWC_E_INVALID;
+       }
+
+       core_if->core_params->lpm_enable = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_lpm_enable(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->lpm_enable;
+}
+
+int dwc_otg_set_param_tx_thr_length(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 8, 128)) {
+               DWC_WARN("Wrong valaue for tx_thr_length\n");
+               DWC_WARN("tx_thr_length must be 8 - 128\n");
+               return -DWC_E_INVALID;
+       }
+
+       core_if->core_params->tx_thr_length = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_tx_thr_length(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->tx_thr_length;
+}
+
+int dwc_otg_set_param_rx_thr_length(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 8, 128)) {
+               DWC_WARN("Wrong valaue for rx_thr_length\n");
+               DWC_WARN("rx_thr_length must be 8 - 128\n");
+               return -DWC_E_INVALID;
+       }
+
+       core_if->core_params->rx_thr_length = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_rx_thr_length(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->rx_thr_length;
+}
+
+int dwc_otg_set_param_dma_burst_size(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       if (DWC_OTG_PARAM_TEST(val, 1, 1) &&
+           DWC_OTG_PARAM_TEST(val, 4, 4) &&
+           DWC_OTG_PARAM_TEST(val, 8, 8) &&
+           DWC_OTG_PARAM_TEST(val, 16, 16) &&
+           DWC_OTG_PARAM_TEST(val, 32, 32) &&
+           DWC_OTG_PARAM_TEST(val, 64, 64) &&
+           DWC_OTG_PARAM_TEST(val, 128, 128) &&
+           DWC_OTG_PARAM_TEST(val, 256, 256)) {
+               DWC_WARN("`%d' invalid for parameter `dma_burst_size'\n", val);
+               return -DWC_E_INVALID;
+       }
+       core_if->core_params->dma_burst_size = val;
+       return 0;
+}
+
+int32_t dwc_otg_get_param_dma_burst_size(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->dma_burst_size;
+}
+
+int dwc_otg_set_param_pti_enable(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("`%d' invalid for parameter `pti_enable'\n", val);
+               return -DWC_E_INVALID;
+       }
+       if (val && (core_if->snpsid < OTG_CORE_REV_2_72a)) {
+               if (dwc_otg_param_initialized(core_if->core_params->pti_enable)) {
+                       DWC_ERROR
+                           ("%d invalid for parameter pti_enable. Check HW configuration.\n",
+                            val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+       core_if->core_params->pti_enable = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_pti_enable(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->pti_enable;
+}
+
+int dwc_otg_set_param_mpi_enable(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("`%d' invalid for parameter `mpi_enable'\n", val);
+               return -DWC_E_INVALID;
+       }
+       if (val && (core_if->hwcfg2.b.multi_proc_int == 0)) {
+               if (dwc_otg_param_initialized(core_if->core_params->mpi_enable)) {
+                       DWC_ERROR
+                           ("%d invalid for parameter mpi_enable. Check HW configuration.\n",
+                            val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+       core_if->core_params->mpi_enable = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_mpi_enable(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->mpi_enable;
+}
+
+int dwc_otg_set_param_adp_enable(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("`%d' invalid for parameter `adp_enable'\n", val);
+               return -DWC_E_INVALID;
+       }
+       if (val && (core_if->hwcfg3.b.adp_supp == 0)) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->adp_supp_enable)) {
+                       DWC_ERROR
+                           ("%d invalid for parameter adp_enable. Check HW configuration.\n",
+                            val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+       core_if->core_params->adp_supp_enable = val;
+       /*Set OTG version 2.0 in case of enabling ADP*/
+       if (val)
+               dwc_otg_set_param_otg_ver(core_if, 1);
+
+       return retval;
+}
+
+int32_t dwc_otg_get_param_adp_enable(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->adp_supp_enable;
+}
+
+int dwc_otg_set_param_ic_usb_cap(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("`%d' invalid for parameter `ic_usb_cap'\n", val);
+               DWC_WARN("ic_usb_cap must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val && (core_if->hwcfg2.b.otg_enable_ic_usb == 0)) {
+               if (dwc_otg_param_initialized(core_if->core_params->ic_usb_cap)) {
+                       DWC_ERROR
+                           ("%d invalid for parameter ic_usb_cap. Check HW configuration.\n",
+                            val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+       core_if->core_params->ic_usb_cap = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_ic_usb_cap(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->ic_usb_cap;
+}
+
+int dwc_otg_set_param_ahb_thr_ratio(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       int valid = 1;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 3)) {
+               DWC_WARN("`%d' invalid for parameter `ahb_thr_ratio'\n", val);
+               DWC_WARN("ahb_thr_ratio must be 0 - 3\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (val
+           && (core_if->snpsid < OTG_CORE_REV_2_81a
+               || !dwc_otg_get_param_thr_ctl(core_if))) {
+               valid = 0;
+       } else if (val
+                  && ((dwc_otg_get_param_tx_thr_length(core_if) / (1 << val)) <
+                      4)) {
+               valid = 0;
+       }
+       if (valid == 0) {
+               if (dwc_otg_param_initialized
+                   (core_if->core_params->ahb_thr_ratio)) {
+                       DWC_ERROR
+                           ("%d invalid for parameter ahb_thr_ratio. Check HW configuration.\n",
+                            val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+
+       core_if->core_params->ahb_thr_ratio = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_ahb_thr_ratio(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->ahb_thr_ratio;
+}
+
+int dwc_otg_set_param_power_down(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       int valid = 1;
+       hwcfg4_data_t hwcfg4 = {.d32 = 0 };
+       hwcfg4.d32 = DWC_READ_REG32(&core_if->core_global_regs->ghwcfg4);
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 3)) {
+               DWC_WARN("`%d' invalid for parameter `power_down'\n", val);
+               DWC_WARN("power_down must be 0 - 2\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val == 2) && (core_if->snpsid < OTG_CORE_REV_2_91a)) {
+               valid = 0;
+       }
+       if ((val == 3)
+           && ((core_if->snpsid < OTG_CORE_REV_3_00a)
+               || (hwcfg4.b.xhiber == 0))) {
+               valid = 0;
+       }
+       if (valid == 0) {
+               if (dwc_otg_param_initialized(core_if->core_params->power_down)) {
+                       DWC_ERROR
+                           ("%d invalid for parameter power_down. Check HW configuration.\n",
+                            val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+       core_if->core_params->power_down = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_power_down(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->power_down;
+}
+
+int dwc_otg_set_param_reload_ctl(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       int valid = 1;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("`%d' invalid for parameter `reload_ctl'\n", val);
+               DWC_WARN("reload_ctl must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val == 1) && (core_if->snpsid < OTG_CORE_REV_2_92a)) {
+               valid = 0;
+       }
+       if (valid == 0) {
+               if (dwc_otg_param_initialized(core_if->core_params->reload_ctl)) {
+                       DWC_ERROR("%d invalid for parameter reload_ctl."
+                                 "Check HW configuration.\n", val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+       core_if->core_params->reload_ctl = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_reload_ctl(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->reload_ctl;
+}
+
+int dwc_otg_set_param_dev_out_nak(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       int valid = 1;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("`%d' invalid for parameter `dev_out_nak'\n", val);
+               DWC_WARN("dev_out_nak must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val == 1) && ((core_if->snpsid < OTG_CORE_REV_2_93a) ||
+               !(core_if->core_params->dma_desc_enable))) {
+               valid = 0;
+       }
+       if (valid == 0) {
+               if (dwc_otg_param_initialized(core_if->core_params->dev_out_nak)) {
+                       DWC_ERROR("%d invalid for parameter dev_out_nak."
+                               "Check HW configuration.\n", val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+       core_if->core_params->dev_out_nak = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_dev_out_nak(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->dev_out_nak;
+}
+
+int dwc_otg_set_param_cont_on_bna(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       int valid = 1;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("`%d' invalid for parameter `cont_on_bna'\n", val);
+               DWC_WARN("cont_on_bna must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val == 1) && ((core_if->snpsid < OTG_CORE_REV_2_94a) ||
+               !(core_if->core_params->dma_desc_enable))) {
+                       valid = 0;
+       }
+       if (valid == 0) {
+               if (dwc_otg_param_initialized(core_if->core_params->cont_on_bna)) {
+                       DWC_ERROR("%d invalid for parameter cont_on_bna."
+                               "Check HW configuration.\n", val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+       core_if->core_params->cont_on_bna = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_cont_on_bna(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->cont_on_bna;
+}
+
+int dwc_otg_set_param_ahb_single(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+       int valid = 1;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("`%d' invalid for parameter `ahb_single'\n", val);
+               DWC_WARN("ahb_single must be 0 or 1\n");
+               return -DWC_E_INVALID;
+       }
+
+       if ((val == 1) && (core_if->snpsid < OTG_CORE_REV_2_94a)) {
+                       valid = 0;
+       }
+       if (valid == 0) {
+               if (dwc_otg_param_initialized(core_if->core_params->ahb_single)) {
+                       DWC_ERROR("%d invalid for parameter ahb_single."
+                               "Check HW configuration.\n", val);
+               }
+               retval = -DWC_E_INVALID;
+               val = 0;
+       }
+       core_if->core_params->ahb_single = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_ahb_single(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->ahb_single;
+}
+
+int dwc_otg_set_param_otg_ver(dwc_otg_core_if_t * core_if, int32_t val)
+{
+       int retval = 0;
+
+       if (DWC_OTG_PARAM_TEST(val, 0, 1)) {
+               DWC_WARN("`%d' invalid for parameter `otg_ver'\n", val);
+               DWC_WARN
+                   ("otg_ver must be 0(for OTG 1.3 support) or 1(for OTG 2.0 support)\n");
+               return -DWC_E_INVALID;
+       }
+
+       core_if->core_params->otg_ver = val;
+       return retval;
+}
+
+int32_t dwc_otg_get_param_otg_ver(dwc_otg_core_if_t * core_if)
+{
+       return core_if->core_params->otg_ver;
+}
+
+uint32_t dwc_otg_get_hnpstatus(dwc_otg_core_if_t * core_if)
+{
+       gotgctl_data_t otgctl;
+       otgctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
+       return otgctl.b.hstnegscs;
+}
+
+uint32_t dwc_otg_get_srpstatus(dwc_otg_core_if_t * core_if)
+{
+       gotgctl_data_t otgctl;
+       otgctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
+       return otgctl.b.sesreqscs;
+}
+
+void dwc_otg_set_hnpreq(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       if(core_if->otg_ver == 0) {
+               gotgctl_data_t otgctl;
+               otgctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
+               otgctl.b.hnpreq = val;
+               DWC_WRITE_REG32(&core_if->core_global_regs->gotgctl, otgctl.d32);
+       } else {
+               core_if->otg_sts = val;
+       }
+}
+
+uint32_t dwc_otg_get_gsnpsid(dwc_otg_core_if_t * core_if)
+{
+       return core_if->snpsid;
+}
+
+uint32_t dwc_otg_get_mode(dwc_otg_core_if_t * core_if)
+{
+       gintsts_data_t gintsts;
+       gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+       return gintsts.b.curmode;
+}
+
+uint32_t dwc_otg_get_hnpcapable(dwc_otg_core_if_t * core_if)
+{
+       gusbcfg_data_t usbcfg;
+       usbcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+       return usbcfg.b.hnpcap;
+}
+
+void dwc_otg_set_hnpcapable(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       gusbcfg_data_t usbcfg;
+       usbcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+       usbcfg.b.hnpcap = val;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg, usbcfg.d32);
+}
+
+uint32_t dwc_otg_get_srpcapable(dwc_otg_core_if_t * core_if)
+{
+       gusbcfg_data_t usbcfg;
+       usbcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+       return usbcfg.b.srpcap;
+}
+
+void dwc_otg_set_srpcapable(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       gusbcfg_data_t usbcfg;
+       usbcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+       usbcfg.b.srpcap = val;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg, usbcfg.d32);
+}
+
+uint32_t dwc_otg_get_devspeed(dwc_otg_core_if_t * core_if)
+{
+       dcfg_data_t dcfg;
+       /* originally: dcfg.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg); */
+
+        dcfg.d32 = -1; //GRAYG
+        DWC_DEBUGPL(DBG_CILV, "%s - core_if(%p)\n", __func__, core_if);
+        if (NULL == core_if)
+                DWC_ERROR("reg request with NULL core_if\n");
+        DWC_DEBUGPL(DBG_CILV, "%s - core_if(%p)->dev_if(%p)\n", __func__,
+                    core_if, core_if->dev_if);
+        if (NULL == core_if->dev_if)
+                DWC_ERROR("reg request with NULL dev_if\n");
+        DWC_DEBUGPL(DBG_CILV, "%s - core_if(%p)->dev_if(%p)->"
+                    "dev_global_regs(%p)\n", __func__,
+                    core_if, core_if->dev_if,
+                    core_if->dev_if->dev_global_regs);
+        if (NULL == core_if->dev_if->dev_global_regs)
+                DWC_ERROR("reg request with NULL dev_global_regs\n");
+        else {
+                DWC_DEBUGPL(DBG_CILV, "%s - &core_if(%p)->dev_if(%p)->"
+                            "dev_global_regs(%p)->dcfg = %p\n", __func__,
+                            core_if, core_if->dev_if,
+                            core_if->dev_if->dev_global_regs,
+                            &core_if->dev_if->dev_global_regs->dcfg);
+               dcfg.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg);
+        }
+       return dcfg.b.devspd;
+}
+
+void dwc_otg_set_devspeed(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       dcfg_data_t dcfg;
+       dcfg.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg);
+       dcfg.b.devspd = val;
+       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dcfg, dcfg.d32);
+}
+
+uint32_t dwc_otg_get_busconnected(dwc_otg_core_if_t * core_if)
+{
+       hprt0_data_t hprt0;
+       hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
+       return hprt0.b.prtconnsts;
+}
+
+uint32_t dwc_otg_get_enumspeed(dwc_otg_core_if_t * core_if)
+{
+       dsts_data_t dsts;
+       dsts.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
+       return dsts.b.enumspd;
+}
+
+uint32_t dwc_otg_get_prtpower(dwc_otg_core_if_t * core_if)
+{
+       hprt0_data_t hprt0;
+       hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
+       return hprt0.b.prtpwr;
+
+}
+
+uint32_t dwc_otg_get_core_state(dwc_otg_core_if_t * core_if)
+{
+       return core_if->hibernation_suspend;
+}
+
+void dwc_otg_set_prtpower(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       hprt0_data_t hprt0;
+       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+       hprt0.b.prtpwr = val;
+       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+}
+
+uint32_t dwc_otg_get_prtsuspend(dwc_otg_core_if_t * core_if)
+{
+       hprt0_data_t hprt0;
+       hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
+       return hprt0.b.prtsusp;
+
+}
+
+void dwc_otg_set_prtsuspend(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       hprt0_data_t hprt0;
+       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+       hprt0.b.prtsusp = val;
+       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+}
+
+uint32_t dwc_otg_get_fr_interval(dwc_otg_core_if_t * core_if)
+{
+       hfir_data_t hfir;
+       hfir.d32 = DWC_READ_REG32(&core_if->host_if->host_global_regs->hfir);
+       return hfir.b.frint;
+
+}
+
+void dwc_otg_set_fr_interval(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       hfir_data_t hfir;
+       uint32_t fram_int;
+       fram_int = calc_frame_interval(core_if);
+       hfir.d32 = DWC_READ_REG32(&core_if->host_if->host_global_regs->hfir);
+       if (!core_if->core_params->reload_ctl) {
+               DWC_WARN("\nCannot reload HFIR register.HFIR.HFIRRldCtrl bit is"
+                        "not set to 1.\nShould load driver with reload_ctl=1"
+                        " module parameter\n");
+               return;
+       }
+       switch (fram_int) {
+       case 3750:
+               if ((val < 3350) || (val > 4150)) {
+                       DWC_WARN("HFIR interval for HS core and 30 MHz"
+                                "clock freq should be from 3350 to 4150\n");
+                       return;
+               }
+               break;
+       case 30000:
+               if ((val < 26820) || (val > 33180)) {
+                       DWC_WARN("HFIR interval for FS/LS core and 30 MHz"
+                                "clock freq should be from 26820 to 33180\n");
+                       return;
+               }
+               break;
+       case 6000:
+               if ((val < 5360) || (val > 6640)) {
+                       DWC_WARN("HFIR interval for HS core and 48 MHz"
+                                "clock freq should be from 5360 to 6640\n");
+                       return;
+               }
+               break;
+       case 48000:
+               if ((val < 42912) || (val > 53088)) {
+                       DWC_WARN("HFIR interval for FS/LS core and 48 MHz"
+                                "clock freq should be from 42912 to 53088\n");
+                       return;
+               }
+               break;
+       case 7500:
+               if ((val < 6700) || (val > 8300)) {
+                       DWC_WARN("HFIR interval for HS core and 60 MHz"
+                                "clock freq should be from 6700 to 8300\n");
+                       return;
+               }
+               break;
+       case 60000:
+               if ((val < 53640) || (val > 65536)) {
+                       DWC_WARN("HFIR interval for FS/LS core and 60 MHz"
+                                "clock freq should be from 53640 to 65536\n");
+                       return;
+               }
+               break;
+       default:
+               DWC_WARN("Unknown frame interval\n");
+               return;
+               break;
+
+       }
+       hfir.b.frint = val;
+       DWC_WRITE_REG32(&core_if->host_if->host_global_regs->hfir, hfir.d32);
+}
+
+uint32_t dwc_otg_get_mode_ch_tim(dwc_otg_core_if_t * core_if)
+{
+       hcfg_data_t hcfg;
+       hcfg.d32 = DWC_READ_REG32(&core_if->host_if->host_global_regs->hcfg);
+       return hcfg.b.modechtimen;
+
+}
+
+void dwc_otg_set_mode_ch_tim(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       hcfg_data_t hcfg;
+       hcfg.d32 = DWC_READ_REG32(&core_if->host_if->host_global_regs->hcfg);
+       hcfg.b.modechtimen = val;
+       DWC_WRITE_REG32(&core_if->host_if->host_global_regs->hcfg, hcfg.d32);
+}
+
+void dwc_otg_set_prtresume(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       hprt0_data_t hprt0;
+       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+       hprt0.b.prtres = val;
+       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+}
+
+uint32_t dwc_otg_get_remotewakesig(dwc_otg_core_if_t * core_if)
+{
+       dctl_data_t dctl;
+       dctl.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dctl);
+       return dctl.b.rmtwkupsig;
+}
+
+uint32_t dwc_otg_get_lpm_portsleepstatus(dwc_otg_core_if_t * core_if)
+{
+       glpmcfg_data_t lpmcfg;
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+
+       DWC_ASSERT(!
+                  ((core_if->lx_state == DWC_OTG_L1) ^ lpmcfg.b.prt_sleep_sts),
+                  "lx_state = %d, lmpcfg.prt_sleep_sts = %d\n",
+                  core_if->lx_state, lpmcfg.b.prt_sleep_sts);
+
+       return lpmcfg.b.prt_sleep_sts;
+}
+
+uint32_t dwc_otg_get_lpm_remotewakeenabled(dwc_otg_core_if_t * core_if)
+{
+       glpmcfg_data_t lpmcfg;
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       return lpmcfg.b.rem_wkup_en;
+}
+
+uint32_t dwc_otg_get_lpmresponse(dwc_otg_core_if_t * core_if)
+{
+       glpmcfg_data_t lpmcfg;
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       return lpmcfg.b.appl_resp;
+}
+
+void dwc_otg_set_lpmresponse(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       glpmcfg_data_t lpmcfg;
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       lpmcfg.b.appl_resp = val;
+       DWC_WRITE_REG32(&core_if->core_global_regs->glpmcfg, lpmcfg.d32);
+}
+
+uint32_t dwc_otg_get_hsic_connect(dwc_otg_core_if_t * core_if)
+{
+       glpmcfg_data_t lpmcfg;
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       return lpmcfg.b.hsic_connect;
+}
+
+void dwc_otg_set_hsic_connect(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       glpmcfg_data_t lpmcfg;
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       lpmcfg.b.hsic_connect = val;
+       DWC_WRITE_REG32(&core_if->core_global_regs->glpmcfg, lpmcfg.d32);
+}
+
+uint32_t dwc_otg_get_inv_sel_hsic(dwc_otg_core_if_t * core_if)
+{
+       glpmcfg_data_t lpmcfg;
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       return lpmcfg.b.inv_sel_hsic;
+
+}
+
+void dwc_otg_set_inv_sel_hsic(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       glpmcfg_data_t lpmcfg;
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       lpmcfg.b.inv_sel_hsic = val;
+       DWC_WRITE_REG32(&core_if->core_global_regs->glpmcfg, lpmcfg.d32);
+}
+
+uint32_t dwc_otg_get_gotgctl(dwc_otg_core_if_t * core_if)
+{
+       return DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
+}
+
+void dwc_otg_set_gotgctl(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       DWC_WRITE_REG32(&core_if->core_global_regs->gotgctl, val);
+}
+
+uint32_t dwc_otg_get_gusbcfg(dwc_otg_core_if_t * core_if)
+{
+       return DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+}
+
+void dwc_otg_set_gusbcfg(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg, val);
+}
+
+uint32_t dwc_otg_get_grxfsiz(dwc_otg_core_if_t * core_if)
+{
+       return DWC_READ_REG32(&core_if->core_global_regs->grxfsiz);
+}
+
+void dwc_otg_set_grxfsiz(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       DWC_WRITE_REG32(&core_if->core_global_regs->grxfsiz, val);
+}
+
+uint32_t dwc_otg_get_gnptxfsiz(dwc_otg_core_if_t * core_if)
+{
+       return DWC_READ_REG32(&core_if->core_global_regs->gnptxfsiz);
+}
+
+void dwc_otg_set_gnptxfsiz(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       DWC_WRITE_REG32(&core_if->core_global_regs->gnptxfsiz, val);
+}
+
+uint32_t dwc_otg_get_gpvndctl(dwc_otg_core_if_t * core_if)
+{
+       return DWC_READ_REG32(&core_if->core_global_regs->gpvndctl);
+}
+
+void dwc_otg_set_gpvndctl(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       DWC_WRITE_REG32(&core_if->core_global_regs->gpvndctl, val);
+}
+
+uint32_t dwc_otg_get_ggpio(dwc_otg_core_if_t * core_if)
+{
+       return DWC_READ_REG32(&core_if->core_global_regs->ggpio);
+}
+
+void dwc_otg_set_ggpio(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       DWC_WRITE_REG32(&core_if->core_global_regs->ggpio, val);
+}
+
+uint32_t dwc_otg_get_hprt0(dwc_otg_core_if_t * core_if)
+{
+       return DWC_READ_REG32(core_if->host_if->hprt0);
+
+}
+
+void dwc_otg_set_hprt0(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       DWC_WRITE_REG32(core_if->host_if->hprt0, val);
+}
+
+uint32_t dwc_otg_get_guid(dwc_otg_core_if_t * core_if)
+{
+       return DWC_READ_REG32(&core_if->core_global_regs->guid);
+}
+
+void dwc_otg_set_guid(dwc_otg_core_if_t * core_if, uint32_t val)
+{
+       DWC_WRITE_REG32(&core_if->core_global_regs->guid, val);
+}
+
+uint32_t dwc_otg_get_hptxfsiz(dwc_otg_core_if_t * core_if)
+{
+       return DWC_READ_REG32(&core_if->core_global_regs->hptxfsiz);
+}
+
+uint16_t dwc_otg_get_otg_version(dwc_otg_core_if_t * core_if)
+{
+       return ((core_if->otg_ver == 1) ? (uint16_t)0x0200 : (uint16_t)0x0103);
+}
+
+/**
+ * Start the SRP timer to detect when the SRP does not complete within
+ * 6 seconds.
+ *
+ * @param core_if the pointer to core_if strucure.
+ */
+void dwc_otg_pcd_start_srp_timer(dwc_otg_core_if_t * core_if)
+{
+       core_if->srp_timer_started = 1;
+       DWC_TIMER_SCHEDULE(core_if->srp_timer, 6000 /* 6 secs */ );
+}
+
+void dwc_otg_initiate_srp(dwc_otg_core_if_t * core_if)
+{
+       uint32_t *addr = (uint32_t *) & (core_if->core_global_regs->gotgctl);
+       gotgctl_data_t mem;
+       gotgctl_data_t val;
+
+       val.d32 = DWC_READ_REG32(addr);
+       if (val.b.sesreq) {
+               DWC_ERROR("Session Request Already active!\n");
+               return;
+       }
+
+       DWC_INFO("Session Request Initated\n"); //NOTICE
+       mem.d32 = DWC_READ_REG32(addr);
+       mem.b.sesreq = 1;
+       DWC_WRITE_REG32(addr, mem.d32);
+
+       /* Start the SRP timer */
+       dwc_otg_pcd_start_srp_timer(core_if);
+       return;
+}
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_cil.h
@@ -0,0 +1,1464 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_cil.h $
+ * $Revision: #123 $
+ * $Date: 2012/08/10 $
+ * $Change: 2047372 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+#if !defined(__DWC_CIL_H__)
+#define __DWC_CIL_H__
+
+#include "dwc_list.h"
+#include "dwc_otg_dbg.h"
+#include "dwc_otg_regs.h"
+
+#include "dwc_otg_core_if.h"
+#include "dwc_otg_adp.h"
+
+/**
+ * @file
+ * This file contains the interface to the Core Interface Layer.
+ */
+
+#ifdef DWC_UTE_CFI
+
+#define MAX_DMA_DESCS_PER_EP   256
+
+/**
+ * Enumeration for the data buffer mode
+ */
+typedef enum _data_buffer_mode {
+       BM_STANDARD = 0,        /* data buffer is in normal mode */
+       BM_SG = 1,              /* data buffer uses the scatter/gather mode */
+       BM_CONCAT = 2,          /* data buffer uses the concatenation mode */
+       BM_CIRCULAR = 3,        /* data buffer uses the circular DMA mode */
+       BM_ALIGN = 4            /* data buffer is in buffer alignment mode */
+} data_buffer_mode_e;
+#endif //DWC_UTE_CFI
+
+/** Macros defined for DWC OTG HW Release version */
+
+#define OTG_CORE_REV_2_60a     0x4F54260A
+#define OTG_CORE_REV_2_71a     0x4F54271A
+#define OTG_CORE_REV_2_72a     0x4F54272A
+#define OTG_CORE_REV_2_80a     0x4F54280A
+#define OTG_CORE_REV_2_81a     0x4F54281A
+#define OTG_CORE_REV_2_90a     0x4F54290A
+#define OTG_CORE_REV_2_91a     0x4F54291A
+#define OTG_CORE_REV_2_92a     0x4F54292A
+#define OTG_CORE_REV_2_93a     0x4F54293A
+#define OTG_CORE_REV_2_94a     0x4F54294A
+#define OTG_CORE_REV_3_00a     0x4F54300A
+
+/**
+ * Information for each ISOC packet.
+ */
+typedef struct iso_pkt_info {
+       uint32_t offset;
+       uint32_t length;
+       int32_t status;
+} iso_pkt_info_t;
+
+/**
+ * The <code>dwc_ep</code> structure represents the state of a single
+ * endpoint when acting in device mode. It contains the data items
+ * needed for an endpoint to be activated and transfer packets.
+ */
+typedef struct dwc_ep {
+       /** EP number used for register address lookup */
+       uint8_t num;
+       /** EP direction 0 = OUT */
+       unsigned is_in:1;
+       /** EP active. */
+       unsigned active:1;
+
+       /**
+        * Periodic Tx FIFO # for IN EPs For INTR EP set to 0 to use non-periodic
+        * Tx FIFO. If dedicated Tx FIFOs are enabled Tx FIFO # FOR IN EPs*/
+       unsigned tx_fifo_num:4;
+       /** EP type: 0 - Control, 1 - ISOC,      2 - BULK,      3 - INTR */
+       unsigned type:2;
+#define DWC_OTG_EP_TYPE_CONTROL           0
+#define DWC_OTG_EP_TYPE_ISOC      1
+#define DWC_OTG_EP_TYPE_BULK      2
+#define DWC_OTG_EP_TYPE_INTR      3
+
+       /** DATA start PID for INTR and BULK EP */
+       unsigned data_pid_start:1;
+       /** Frame (even/odd) for ISOC EP */
+       unsigned even_odd_frame:1;
+       /** Max Packet bytes */
+       unsigned maxpacket:11;
+
+       /** Max Transfer size */
+       uint32_t maxxfer;
+
+       /** @name Transfer state */
+       /** @{ */
+
+       /**
+        * Pointer to the beginning of the transfer buffer -- do not modify
+        * during transfer.
+        */
+
+       dwc_dma_t dma_addr;
+
+       dwc_dma_t dma_desc_addr;
+       dwc_otg_dev_dma_desc_t *desc_addr;
+
+       uint8_t *start_xfer_buff;
+       /** pointer to the transfer buffer */
+       uint8_t *xfer_buff;
+       /** Number of bytes to transfer */
+       unsigned xfer_len:19;
+       /** Number of bytes transferred. */
+       unsigned xfer_count:19;
+       /** Sent ZLP */
+       unsigned sent_zlp:1;
+       /** Total len for control transfer */
+       unsigned total_len:19;
+
+       /** stall clear flag */
+       unsigned stall_clear_flag:1;
+
+       /** SETUP pkt cnt rollover flag for EP0 out*/
+       unsigned stp_rollover;
+
+#ifdef DWC_UTE_CFI
+       /* The buffer mode */
+       data_buffer_mode_e buff_mode;
+
+       /* The chain of DMA descriptors.
+        * MAX_DMA_DESCS_PER_EP will be allocated for each active EP.
+        */
+       dwc_otg_dma_desc_t *descs;
+
+       /* The DMA address of the descriptors chain start */
+       dma_addr_t descs_dma_addr;
+       /** This variable stores the length of the last enqueued request */
+       uint32_t cfi_req_len;
+#endif                         //DWC_UTE_CFI
+
+/** Max DMA Descriptor count for any EP */
+#define MAX_DMA_DESC_CNT 256
+       /** Allocated DMA Desc count */
+       uint32_t desc_cnt;
+
+       /** bInterval */
+       uint32_t bInterval;
+       /** Next frame num to setup next ISOC transfer */
+       uint32_t frame_num;
+       /** Indicates SOF number overrun in DSTS */
+       uint8_t frm_overrun;
+
+#ifdef DWC_UTE_PER_IO
+       /** Next frame num for which will be setup DMA Desc */
+       uint32_t xiso_frame_num;
+       /** bInterval */
+       uint32_t xiso_bInterval;
+       /** Count of currently active transfers - shall be either 0 or 1 */
+       int xiso_active_xfers;
+       int xiso_queued_xfers;
+#endif
+#ifdef DWC_EN_ISOC
+       /**
+        * Variables specific for ISOC EPs
+        *
+        */
+       /** DMA addresses of ISOC buffers */
+       dwc_dma_t dma_addr0;
+       dwc_dma_t dma_addr1;
+
+       dwc_dma_t iso_dma_desc_addr;
+       dwc_otg_dev_dma_desc_t *iso_desc_addr;
+
+       /** pointer to the transfer buffers */
+       uint8_t *xfer_buff0;
+       uint8_t *xfer_buff1;
+
+       /** number of ISOC Buffer is processing */
+       uint32_t proc_buf_num;
+       /** Interval of ISOC Buffer processing */
+       uint32_t buf_proc_intrvl;
+       /** Data size for regular frame */
+       uint32_t data_per_frame;
+
+       /* todo - pattern data support is to be implemented in the future */
+       /** Data size for pattern frame */
+       uint32_t data_pattern_frame;
+       /** Frame number of pattern data */
+       uint32_t sync_frame;
+
+       /** bInterval */
+       uint32_t bInterval;
+       /** ISO Packet number per frame */
+       uint32_t pkt_per_frm;
+       /** Next frame num for which will be setup DMA Desc */
+       uint32_t next_frame;
+       /** Number of packets per buffer processing */
+       uint32_t pkt_cnt;
+       /** Info for all isoc packets */
+       iso_pkt_info_t *pkt_info;
+       /** current pkt number */
+       uint32_t cur_pkt;
+       /** current pkt number */
+       uint8_t *cur_pkt_addr;
+       /** current pkt number */
+       uint32_t cur_pkt_dma_addr;
+#endif                         /* DWC_EN_ISOC */
+
+/** @} */
+} dwc_ep_t;
+
+/*
+ * Reasons for halting a host channel.
+ */
+typedef enum dwc_otg_halt_status {
+       DWC_OTG_HC_XFER_NO_HALT_STATUS,
+       DWC_OTG_HC_XFER_COMPLETE,
+       DWC_OTG_HC_XFER_URB_COMPLETE,
+       DWC_OTG_HC_XFER_ACK,
+       DWC_OTG_HC_XFER_NAK,
+       DWC_OTG_HC_XFER_NYET,
+       DWC_OTG_HC_XFER_STALL,
+       DWC_OTG_HC_XFER_XACT_ERR,
+       DWC_OTG_HC_XFER_FRAME_OVERRUN,
+       DWC_OTG_HC_XFER_BABBLE_ERR,
+       DWC_OTG_HC_XFER_DATA_TOGGLE_ERR,
+       DWC_OTG_HC_XFER_AHB_ERR,
+       DWC_OTG_HC_XFER_PERIODIC_INCOMPLETE,
+       DWC_OTG_HC_XFER_URB_DEQUEUE
+} dwc_otg_halt_status_e;
+
+/**
+ * Host channel descriptor. This structure represents the state of a single
+ * host channel when acting in host mode. It contains the data items needed to
+ * transfer packets to an endpoint via a host channel.
+ */
+typedef struct dwc_hc {
+       /** Host channel number used for register address lookup */
+       uint8_t hc_num;
+
+       /** Device to access */
+       unsigned dev_addr:7;
+
+       /** EP to access */
+       unsigned ep_num:4;
+
+       /** EP direction. 0: OUT, 1: IN */
+       unsigned ep_is_in:1;
+
+       /**
+        * EP speed.
+        * One of the following values:
+        *      - DWC_OTG_EP_SPEED_LOW
+        *      - DWC_OTG_EP_SPEED_FULL
+        *      - DWC_OTG_EP_SPEED_HIGH
+        */
+       unsigned speed:2;
+#define DWC_OTG_EP_SPEED_LOW   0
+#define DWC_OTG_EP_SPEED_FULL  1
+#define DWC_OTG_EP_SPEED_HIGH  2
+
+       /**
+        * Endpoint type.
+        * One of the following values:
+        *      - DWC_OTG_EP_TYPE_CONTROL: 0
+        *      - DWC_OTG_EP_TYPE_ISOC: 1
+        *      - DWC_OTG_EP_TYPE_BULK: 2
+        *      - DWC_OTG_EP_TYPE_INTR: 3
+        */
+       unsigned ep_type:2;
+
+       /** Max packet size in bytes */
+       unsigned max_packet:11;
+
+       /**
+        * PID for initial transaction.
+        * 0: DATA0,<br>
+        * 1: DATA2,<br>
+        * 2: DATA1,<br>
+        * 3: MDATA (non-Control EP),
+        *        SETUP (Control EP)
+        */
+       unsigned data_pid_start:2;
+#define DWC_OTG_HC_PID_DATA0 0
+#define DWC_OTG_HC_PID_DATA2 1
+#define DWC_OTG_HC_PID_DATA1 2
+#define DWC_OTG_HC_PID_MDATA 3
+#define DWC_OTG_HC_PID_SETUP 3
+
+       /** Number of periodic transactions per (micro)frame */
+       unsigned multi_count:2;
+
+       /** @name Transfer State */
+       /** @{ */
+
+       /** Pointer to the current transfer buffer position. */
+       uint8_t *xfer_buff;
+       /**
+        * In Buffer DMA mode this buffer will be used
+        * if xfer_buff is not DWORD aligned.
+        */
+       dwc_dma_t align_buff;
+       /** Total number of bytes to transfer. */
+       uint32_t xfer_len;
+       /** Number of bytes transferred so far. */
+       uint32_t xfer_count;
+       /** Packet count at start of transfer.*/
+       uint16_t start_pkt_count;
+
+       /**
+        * Flag to indicate whether the transfer has been started. Set to 1 if
+        * it has been started, 0 otherwise.
+        */
+       uint8_t xfer_started;
+
+       /**
+        * Set to 1 to indicate that a PING request should be issued on this
+        * channel. If 0, process normally.
+        */
+       uint8_t do_ping;
+
+       /**
+        * Set to 1 to indicate that the error count for this transaction is
+        * non-zero. Set to 0 if the error count is 0.
+        */
+       uint8_t error_state;
+
+       /**
+        * Set to 1 to indicate that this channel should be halted the next
+        * time a request is queued for the channel. This is necessary in
+        * slave mode if no request queue space is available when an attempt
+        * is made to halt the channel.
+        */
+       uint8_t halt_on_queue;
+
+       /**
+        * Set to 1 if the host channel has been halted, but the core is not
+        * finished flushing queued requests. Otherwise 0.
+        */
+       uint8_t halt_pending;
+
+       /**
+        * Reason for halting the host channel.
+        */
+       dwc_otg_halt_status_e halt_status;
+
+       /*
+        * Split settings for the host channel
+        */
+       uint8_t do_split;                  /**< Enable split for the channel */
+       uint8_t complete_split;    /**< Enable complete split */
+       uint8_t hub_addr;                  /**< Address of high speed hub */
+
+       uint8_t port_addr;                 /**< Port of the low/full speed device */
+       /** Split transaction position
+        * One of the following values:
+        *        - DWC_HCSPLIT_XACTPOS_MID
+        *        - DWC_HCSPLIT_XACTPOS_BEGIN
+        *        - DWC_HCSPLIT_XACTPOS_END
+        *        - DWC_HCSPLIT_XACTPOS_ALL */
+       uint8_t xact_pos;
+
+       /** Set when the host channel does a short read. */
+       uint8_t short_read;
+
+       /**
+        * Number of requests issued for this channel since it was assigned to
+        * the current transfer (not counting PINGs).
+        */
+       uint8_t requests;
+
+       /**
+        * Queue Head for the transfer being processed by this channel.
+        */
+       struct dwc_otg_qh *qh;
+
+       /** @} */
+
+       /** Entry in list of host channels. */
+        DWC_CIRCLEQ_ENTRY(dwc_hc) hc_list_entry;
+
+       /** @name Descriptor DMA support */
+       /** @{ */
+
+       /** Number of Transfer Descriptors */
+       uint16_t ntd;
+
+       /** Descriptor List DMA address */
+       dwc_dma_t desc_list_addr;
+
+       /** Scheduling micro-frame bitmap. */
+       uint8_t schinfo;
+
+       /** @} */
+} dwc_hc_t;
+
+/**
+ * The following parameters may be specified when starting the module. These
+ * parameters define how the DWC_otg controller should be configured.
+ */
+typedef struct dwc_otg_core_params {
+       int32_t opt;
+
+       /**
+        * Specifies the OTG capabilities. The driver will automatically
+        * detect the value for this parameter if none is specified.
+        * 0 - HNP and SRP capable (default)
+        * 1 - SRP Only capable
+        * 2 - No HNP/SRP capable
+        */
+       int32_t otg_cap;
+
+       /**
+        * Specifies whether to use slave or DMA mode for accessing the data
+        * FIFOs. The driver will automatically detect the value for this
+        * parameter if none is specified.
+        * 0 - Slave
+        * 1 - DMA (default, if available)
+        */
+       int32_t dma_enable;
+
+       /**
+        * When DMA mode is enabled specifies whether to use address DMA or DMA
+        * Descriptor mode for accessing the data FIFOs in device mode. The driver
+        * will automatically detect the value for this if none is specified.
+        * 0 - address DMA
+        * 1 - DMA Descriptor(default, if available)
+        */
+       int32_t dma_desc_enable;
+       /** The DMA Burst size (applicable only for External DMA
+        * Mode). 1, 4, 8 16, 32, 64, 128, 256 (default 32)
+        */
+       int32_t dma_burst_size; /* Translate this to GAHBCFG values */
+
+       /**
+        * Specifies the maximum speed of operation in host and device mode.
+        * The actual speed depends on the speed of the attached device and
+        * the value of phy_type. The actual speed depends on the speed of the
+        * attached device.
+        * 0 - High Speed (default)
+        * 1 - Full Speed
+        */
+       int32_t speed;
+       /** Specifies whether low power mode is supported when attached
+        *      to a Full Speed or Low Speed device in host mode.
+        * 0 - Don't support low power mode (default)
+        * 1 - Support low power mode
+        */
+       int32_t host_support_fs_ls_low_power;
+
+       /** Specifies the PHY clock rate in low power mode when connected to a
+        * Low Speed device in host mode. This parameter is applicable only if
+        * HOST_SUPPORT_FS_LS_LOW_POWER is enabled. If PHY_TYPE is set to FS
+        * then defaults to 6 MHZ otherwise 48 MHZ.
+        *
+        * 0 - 48 MHz
+        * 1 - 6 MHz
+        */
+       int32_t host_ls_low_power_phy_clk;
+
+       /**
+        * 0 - Use cC FIFO size parameters
+        * 1 - Allow dynamic FIFO sizing (default)
+        */
+       int32_t enable_dynamic_fifo;
+
+       /** Total number of 4-byte words in the data FIFO memory. This
+        * memory includes the Rx FIFO, non-periodic Tx FIFO, and periodic
+        * Tx FIFOs.
+        * 32 to 32768 (default 8192)
+        * Note: The total FIFO memory depth in the FPGA configuration is 8192.
+        */
+       int32_t data_fifo_size;
+
+       /** Number of 4-byte words in the Rx FIFO in device mode when dynamic
+        * FIFO sizing is enabled.
+        * 16 to 32768 (default 1064)
+        */
+       int32_t dev_rx_fifo_size;
+
+       /** Number of 4-byte words in the non-periodic Tx FIFO in device mode
+        * when dynamic FIFO sizing is enabled.
+        * 16 to 32768 (default 1024)
+        */
+       int32_t dev_nperio_tx_fifo_size;
+
+       /** Number of 4-byte words in each of the periodic Tx FIFOs in device
+        * mode when dynamic FIFO sizing is enabled.
+        * 4 to 768 (default 256)
+        */
+       uint32_t dev_perio_tx_fifo_size[MAX_PERIO_FIFOS];
+
+       /** Number of 4-byte words in the Rx FIFO in host mode when dynamic
+        * FIFO sizing is enabled.
+        * 16 to 32768 (default 1024)
+        */
+       int32_t host_rx_fifo_size;
+
+       /** Number of 4-byte words in the non-periodic Tx FIFO in host mode
+        * when Dynamic FIFO sizing is enabled in the core.
+        * 16 to 32768 (default 1024)
+        */
+       int32_t host_nperio_tx_fifo_size;
+
+       /** Number of 4-byte words in the host periodic Tx FIFO when dynamic
+        * FIFO sizing is enabled.
+        * 16 to 32768 (default 1024)
+        */
+       int32_t host_perio_tx_fifo_size;
+
+       /** The maximum transfer size supported in bytes.
+        * 2047 to 65,535  (default 65,535)
+        */
+       int32_t max_transfer_size;
+
+       /** The maximum number of packets in a transfer.
+        * 15 to 511  (default 511)
+        */
+       int32_t max_packet_count;
+
+       /** The number of host channel registers to use.
+        * 1 to 16 (default 12)
+        * Note: The FPGA configuration supports a maximum of 12 host channels.
+        */
+       int32_t host_channels;
+
+       /** The number of endpoints in addition to EP0 available for device
+        * mode operations.
+        * 1 to 15 (default 6 IN and OUT)
+        * Note: The FPGA configuration supports a maximum of 6 IN and OUT
+        * endpoints in addition to EP0.
+        */
+       int32_t dev_endpoints;
+
+               /**
+                * Specifies the type of PHY interface to use. By default, the driver
+                * will automatically detect the phy_type.
+                *
+                * 0 - Full Speed PHY
+                * 1 - UTMI+ (default)
+                * 2 - ULPI
+                */
+       int32_t phy_type;
+
+       /**
+        * Specifies the UTMI+ Data Width. This parameter is
+        * applicable for a PHY_TYPE of UTMI+ or ULPI. (For a ULPI
+        * PHY_TYPE, this parameter indicates the data width between
+        * the MAC and the ULPI Wrapper.) Also, this parameter is
+        * applicable only if the OTG_HSPHY_WIDTH cC parameter was set
+        * to "8 and 16 bits", meaning that the core has been
+        * configured to work at either data path width.
+        *
+        * 8 or 16 bits (default 16)
+        */
+       int32_t phy_utmi_width;
+
+       /**
+        * Specifies whether the ULPI operates at double or single
+        * data rate. This parameter is only applicable if PHY_TYPE is
+        * ULPI.
+        *
+        * 0 - single data rate ULPI interface with 8 bit wide data
+        * bus (default)
+        * 1 - double data rate ULPI interface with 4 bit wide data
+        * bus
+        */
+       int32_t phy_ulpi_ddr;
+
+       /**
+        * Specifies whether to use the internal or external supply to
+        * drive the vbus with a ULPI phy.
+        */
+       int32_t phy_ulpi_ext_vbus;
+
+       /**
+        * Specifies whether to use the I2Cinterface for full speed PHY. This
+        * parameter is only applicable if PHY_TYPE is FS.
+        * 0 - No (default)
+        * 1 - Yes
+        */
+       int32_t i2c_enable;
+
+       int32_t ulpi_fs_ls;
+
+       int32_t ts_dline;
+
+       /**
+        * Specifies whether dedicated transmit FIFOs are
+        * enabled for non periodic IN endpoints in device mode
+        * 0 - No
+        * 1 - Yes
+        */
+       int32_t en_multiple_tx_fifo;
+
+       /** Number of 4-byte words in each of the Tx FIFOs in device
+        * mode when dynamic FIFO sizing is enabled.
+        * 4 to 768 (default 256)
+        */
+       uint32_t dev_tx_fifo_size[MAX_TX_FIFOS];
+
+       /** Thresholding enable flag-
+        * bit 0 - enable non-ISO Tx thresholding
+        * bit 1 - enable ISO Tx thresholding
+        * bit 2 - enable Rx thresholding
+        */
+       uint32_t thr_ctl;
+
+       /** Thresholding length for Tx
+        *      FIFOs in 32 bit DWORDs
+        */
+       uint32_t tx_thr_length;
+
+       /** Thresholding length for Rx
+        *      FIFOs in 32 bit DWORDs
+        */
+       uint32_t rx_thr_length;
+
+       /**
+        * Specifies whether LPM (Link Power Management) support is enabled
+        */
+       int32_t lpm_enable;
+
+       /** Per Transfer Interrupt
+        *      mode enable flag
+        * 1 - Enabled
+        * 0 - Disabled
+        */
+       int32_t pti_enable;
+
+       /** Multi Processor Interrupt
+        *      mode enable flag
+        * 1 - Enabled
+        * 0 - Disabled
+        */
+       int32_t mpi_enable;
+
+       /** IS_USB Capability
+        * 1 - Enabled
+        * 0 - Disabled
+        */
+       int32_t ic_usb_cap;
+
+       /** AHB Threshold Ratio
+        * 2'b00 AHB Threshold =        MAC Threshold
+        * 2'b01 AHB Threshold = 1/2    MAC Threshold
+        * 2'b10 AHB Threshold = 1/4    MAC Threshold
+        * 2'b11 AHB Threshold = 1/8    MAC Threshold
+        */
+       int32_t ahb_thr_ratio;
+
+       /** ADP Support
+        * 1 - Enabled
+        * 0 - Disabled
+        */
+       int32_t adp_supp_enable;
+
+       /** HFIR Reload Control
+        * 0 - The HFIR cannot be reloaded dynamically.
+        * 1 - Allow dynamic reloading of the HFIR register during runtime.
+        */
+       int32_t reload_ctl;
+
+       /** DCFG: Enable device Out NAK
+        * 0 - The core does not set NAK after Bulk Out transfer complete.
+        * 1 - The core sets NAK after Bulk OUT transfer complete.
+        */
+       int32_t dev_out_nak;
+
+       /** DCFG: Enable Continue on BNA
+        * After receiving BNA interrupt the core disables the endpoint,when the
+        * endpoint is re-enabled by the application the core starts processing
+        * 0 - from the DOEPDMA descriptor
+        * 1 - from the descriptor which received the BNA.
+        */
+       int32_t cont_on_bna;
+
+       /** GAHBCFG: AHB Single Support
+        * This bit when programmed supports SINGLE transfers for remainder
+        * data in a transfer for DMA mode of operation.
+        * 0 - in this case the remainder data will be sent using INCR burst size.
+        * 1 - in this case the remainder data will be sent using SINGLE burst size.
+        */
+       int32_t ahb_single;
+
+       /** Core Power down mode
+        * 0 - No Power Down is enabled
+        * 1 - Reserved
+        * 2 - Complete Power Down (Hibernation)
+        */
+       int32_t power_down;
+
+       /** OTG revision supported
+        * 0 - OTG 1.3 revision
+        * 1 - OTG 2.0 revision
+        */
+       int32_t otg_ver;
+
+} dwc_otg_core_params_t;
+
+#ifdef DEBUG
+struct dwc_otg_core_if;
+typedef struct hc_xfer_info {
+       struct dwc_otg_core_if *core_if;
+       dwc_hc_t *hc;
+} hc_xfer_info_t;
+#endif
+
+typedef struct ep_xfer_info {
+       struct dwc_otg_core_if *core_if;
+       dwc_ep_t *ep;
+       uint8_t state;
+} ep_xfer_info_t;
+/*
+ * Device States
+ */
+typedef enum dwc_otg_lx_state {
+       /** On state */
+       DWC_OTG_L0,
+       /** LPM sleep state*/
+       DWC_OTG_L1,
+       /** USB suspend state*/
+       DWC_OTG_L2,
+       /** Off state*/
+       DWC_OTG_L3
+} dwc_otg_lx_state_e;
+
+struct dwc_otg_global_regs_backup {
+       uint32_t gotgctl_local;
+       uint32_t gintmsk_local;
+       uint32_t gahbcfg_local;
+       uint32_t gusbcfg_local;
+       uint32_t grxfsiz_local;
+       uint32_t gnptxfsiz_local;
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       uint32_t glpmcfg_local;
+#endif
+       uint32_t gi2cctl_local;
+       uint32_t hptxfsiz_local;
+       uint32_t pcgcctl_local;
+       uint32_t gdfifocfg_local;
+       uint32_t dtxfsiz_local[MAX_EPS_CHANNELS];
+       uint32_t gpwrdn_local;
+       uint32_t xhib_pcgcctl;
+       uint32_t xhib_gpwrdn;
+};
+
+struct dwc_otg_host_regs_backup {
+       uint32_t hcfg_local;
+       uint32_t haintmsk_local;
+       uint32_t hcintmsk_local[MAX_EPS_CHANNELS];
+       uint32_t hprt0_local;
+       uint32_t hfir_local;
+};
+
+struct dwc_otg_dev_regs_backup {
+       uint32_t dcfg;
+       uint32_t dctl;
+       uint32_t daintmsk;
+       uint32_t diepmsk;
+       uint32_t doepmsk;
+       uint32_t diepctl[MAX_EPS_CHANNELS];
+       uint32_t dieptsiz[MAX_EPS_CHANNELS];
+       uint32_t diepdma[MAX_EPS_CHANNELS];
+};
+/**
+ * The <code>dwc_otg_core_if</code> structure contains information needed to manage
+ * the DWC_otg controller acting in either host or device mode. It
+ * represents the programming view of the controller as a whole.
+ */
+struct dwc_otg_core_if {
+       /** Parameters that define how the core should be configured.*/
+       dwc_otg_core_params_t *core_params;
+
+       /** Core Global registers starting at offset 000h. */
+       dwc_otg_core_global_regs_t *core_global_regs;
+
+       /** Device-specific information */
+       dwc_otg_dev_if_t *dev_if;
+       /** Host-specific information */
+       dwc_otg_host_if_t *host_if;
+
+       /** Value from SNPSID register */
+       uint32_t snpsid;
+
+       /*
+        * Set to 1 if the core PHY interface bits in USBCFG have been
+        * initialized.
+        */
+       uint8_t phy_init_done;
+
+       /*
+        * SRP Success flag, set by srp success interrupt in FS I2C mode
+        */
+       uint8_t srp_success;
+       uint8_t srp_timer_started;
+       /** Timer for SRP. If it expires before SRP is successful
+        * clear the SRP. */
+       dwc_timer_t *srp_timer;
+
+#ifdef DWC_DEV_SRPCAP
+       /* This timer is needed to power on the hibernated host core if SRP is not
+        * initiated on connected SRP capable device for limited period of time
+        */
+       uint8_t pwron_timer_started;
+       dwc_timer_t *pwron_timer;
+#endif
+       /* Common configuration information */
+       /** Power and Clock Gating Control Register */
+       volatile uint32_t *pcgcctl;
+#define DWC_OTG_PCGCCTL_OFFSET 0xE00
+
+       /** Push/pop addresses for endpoints or host channels.*/
+       uint32_t *data_fifo[MAX_EPS_CHANNELS];
+#define DWC_OTG_DATA_FIFO_OFFSET 0x1000
+#define DWC_OTG_DATA_FIFO_SIZE 0x1000
+
+       /** Total RAM for FIFOs (Bytes) */
+       uint16_t total_fifo_size;
+       /** Size of Rx FIFO (Bytes) */
+       uint16_t rx_fifo_size;
+       /** Size of Non-periodic Tx FIFO (Bytes) */
+       uint16_t nperio_tx_fifo_size;
+
+       /** 1 if DMA is enabled, 0 otherwise. */
+       uint8_t dma_enable;
+
+       /** 1 if DMA descriptor is enabled, 0 otherwise. */
+       uint8_t dma_desc_enable;
+
+       /** 1 if PTI Enhancement mode is enabled, 0 otherwise. */
+       uint8_t pti_enh_enable;
+
+       /** 1 if MPI Enhancement mode is enabled, 0 otherwise. */
+       uint8_t multiproc_int_enable;
+
+       /** 1 if dedicated Tx FIFOs are enabled, 0 otherwise. */
+       uint8_t en_multiple_tx_fifo;
+
+       /** Set to 1 if multiple packets of a high-bandwidth transfer is in
+        * process of being queued */
+       uint8_t queuing_high_bandwidth;
+
+       /** Hardware Configuration -- stored here for convenience.*/
+       hwcfg1_data_t hwcfg1;
+       hwcfg2_data_t hwcfg2;
+       hwcfg3_data_t hwcfg3;
+       hwcfg4_data_t hwcfg4;
+       fifosize_data_t hptxfsiz;
+
+       /** Host and Device Configuration -- stored here for convenience.*/
+       hcfg_data_t hcfg;
+       dcfg_data_t dcfg;
+
+       /** The operational State, during transations
+        * (a_host>>a_peripherial and b_device=>b_host) this may not
+        * match the core but allows the software to determine
+        * transitions.
+        */
+       uint8_t op_state;
+
+       /**
+        * Set to 1 if the HCD needs to be restarted on a session request
+        * interrupt. This is required if no connector ID status change has
+        * occurred since the HCD was last disconnected.
+        */
+       uint8_t restart_hcd_on_session_req;
+
+       /** HCD callbacks */
+       /** A-Device is a_host */
+#define A_HOST         (1)
+       /** A-Device is a_suspend */
+#define A_SUSPEND      (2)
+       /** A-Device is a_peripherial */
+#define A_PERIPHERAL   (3)
+       /** B-Device is operating as a Peripheral. */
+#define B_PERIPHERAL   (4)
+       /** B-Device is operating as a Host. */
+#define B_HOST         (5)
+
+       /** HCD callbacks */
+       struct dwc_otg_cil_callbacks *hcd_cb;
+       /** PCD callbacks */
+       struct dwc_otg_cil_callbacks *pcd_cb;
+
+       /** Device mode Periodic Tx FIFO Mask */
+       uint32_t p_tx_msk;
+       /** Device mode Periodic Tx FIFO Mask */
+       uint32_t tx_msk;
+
+       /** Workqueue object used for handling several interrupts */
+       dwc_workq_t *wq_otg;
+
+       /** Timer object used for handling "Wakeup Detected" Interrupt */
+       dwc_timer_t *wkp_timer;
+       /** This arrays used for debug purposes for DEV OUT NAK enhancement */
+       uint32_t start_doeptsiz_val[MAX_EPS_CHANNELS];
+       ep_xfer_info_t ep_xfer_info[MAX_EPS_CHANNELS];
+       dwc_timer_t *ep_xfer_timer[MAX_EPS_CHANNELS];
+#ifdef DEBUG
+       uint32_t start_hcchar_val[MAX_EPS_CHANNELS];
+
+       hc_xfer_info_t hc_xfer_info[MAX_EPS_CHANNELS];
+       dwc_timer_t *hc_xfer_timer[MAX_EPS_CHANNELS];
+
+       uint32_t hfnum_7_samples;
+       uint64_t hfnum_7_frrem_accum;
+       uint32_t hfnum_0_samples;
+       uint64_t hfnum_0_frrem_accum;
+       uint32_t hfnum_other_samples;
+       uint64_t hfnum_other_frrem_accum;
+#endif
+
+#ifdef DWC_UTE_CFI
+       uint16_t pwron_rxfsiz;
+       uint16_t pwron_gnptxfsiz;
+       uint16_t pwron_txfsiz[15];
+
+       uint16_t init_rxfsiz;
+       uint16_t init_gnptxfsiz;
+       uint16_t init_txfsiz[15];
+#endif
+
+       /** Lx state of device */
+       dwc_otg_lx_state_e lx_state;
+
+       /** Saved Core Global registers */
+       struct dwc_otg_global_regs_backup *gr_backup;
+       /** Saved Host registers */
+       struct dwc_otg_host_regs_backup *hr_backup;
+       /** Saved Device registers */
+       struct dwc_otg_dev_regs_backup *dr_backup;
+
+       /** Power Down Enable */
+       uint32_t power_down;
+
+       /** ADP support Enable */
+       uint32_t adp_enable;
+
+       /** ADP structure object */
+       dwc_otg_adp_t adp;
+
+       /** hibernation/suspend flag */
+       int hibernation_suspend;
+
+       /** Device mode extended hibernation flag */
+       int xhib;
+
+       /** OTG revision supported */
+       uint32_t otg_ver;
+
+       /** OTG status flag used for HNP polling */
+       uint8_t otg_sts;
+
+       /** Pointer to either hcd->lock or pcd->lock */
+       dwc_spinlock_t *lock;
+
+       /** Start predict NextEP based on Learning Queue if equal 1,
+        * also used as counter of disabled NP IN EP's */
+       uint8_t start_predict;
+
+       /** NextEp sequence, including EP0: nextep_seq[] = EP if non-periodic and
+        * active, 0xff otherwise */
+       uint8_t nextep_seq[MAX_EPS_CHANNELS];
+
+       /** Index of fisrt EP in nextep_seq array which should be re-enabled **/
+       uint8_t first_in_nextep_seq;
+
+       /** Frame number while entering to ISR - needed for ISOCs **/
+       uint32_t frame_num;
+
+};
+
+#ifdef DEBUG
+/*
+ * This function is called when transfer is timed out.
+ */
+extern void hc_xfer_timeout(void *ptr);
+#endif
+
+/*
+ * This function is called when transfer is timed out on endpoint.
+ */
+extern void ep_xfer_timeout(void *ptr);
+
+/*
+ * The following functions are functions for works
+ * using during handling some interrupts
+ */
+extern void w_conn_id_status_change(void *p);
+
+extern void w_wakeup_detected(void *p);
+
+/** Saves global register values into system memory. */
+extern int dwc_otg_save_global_regs(dwc_otg_core_if_t * core_if);
+/** Saves device register values into system memory. */
+extern int dwc_otg_save_dev_regs(dwc_otg_core_if_t * core_if);
+/** Saves host register values into system memory. */
+extern int dwc_otg_save_host_regs(dwc_otg_core_if_t * core_if);
+/** Restore global register values. */
+extern int dwc_otg_restore_global_regs(dwc_otg_core_if_t * core_if);
+/** Restore host register values. */
+extern int dwc_otg_restore_host_regs(dwc_otg_core_if_t * core_if, int reset);
+/** Restore device register values. */
+extern int dwc_otg_restore_dev_regs(dwc_otg_core_if_t * core_if,
+                                   int rem_wakeup);
+extern int restore_lpm_i2c_regs(dwc_otg_core_if_t * core_if);
+extern int restore_essential_regs(dwc_otg_core_if_t * core_if, int rmode,
+                                 int is_host);
+
+extern int dwc_otg_host_hibernation_restore(dwc_otg_core_if_t * core_if,
+                                           int restore_mode, int reset);
+extern int dwc_otg_device_hibernation_restore(dwc_otg_core_if_t * core_if,
+                                             int rem_wakeup, int reset);
+
+/*
+ * The following functions support initialization of the CIL driver component
+ * and the DWC_otg controller.
+ */
+extern void dwc_otg_core_host_init(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_core_dev_init(dwc_otg_core_if_t * _core_if);
+
+/** @name Device CIL Functions
+ * The following functions support managing the DWC_otg controller in device
+ * mode.
+ */
+/**@{*/
+extern void dwc_otg_wakeup(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_read_setup_packet(dwc_otg_core_if_t * _core_if,
+                                     uint32_t * _dest);
+extern uint32_t dwc_otg_get_frame_number(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_ep0_activate(dwc_otg_core_if_t * _core_if, dwc_ep_t * _ep);
+extern void dwc_otg_ep_activate(dwc_otg_core_if_t * _core_if, dwc_ep_t * _ep);
+extern void dwc_otg_ep_deactivate(dwc_otg_core_if_t * _core_if, dwc_ep_t * _ep);
+extern void dwc_otg_ep_start_transfer(dwc_otg_core_if_t * _core_if,
+                                     dwc_ep_t * _ep);
+extern void dwc_otg_ep_start_zl_transfer(dwc_otg_core_if_t * _core_if,
+                                        dwc_ep_t * _ep);
+extern void dwc_otg_ep0_start_transfer(dwc_otg_core_if_t * _core_if,
+                                      dwc_ep_t * _ep);
+extern void dwc_otg_ep0_continue_transfer(dwc_otg_core_if_t * _core_if,
+                                         dwc_ep_t * _ep);
+extern void dwc_otg_ep_write_packet(dwc_otg_core_if_t * _core_if,
+                                   dwc_ep_t * _ep, int _dma);
+extern void dwc_otg_ep_set_stall(dwc_otg_core_if_t * _core_if, dwc_ep_t * _ep);
+extern void dwc_otg_ep_clear_stall(dwc_otg_core_if_t * _core_if,
+                                  dwc_ep_t * _ep);
+extern void dwc_otg_enable_device_interrupts(dwc_otg_core_if_t * _core_if);
+
+#ifdef DWC_EN_ISOC
+extern void dwc_otg_iso_ep_start_frm_transfer(dwc_otg_core_if_t * core_if,
+                                             dwc_ep_t * ep);
+extern void dwc_otg_iso_ep_start_buf_transfer(dwc_otg_core_if_t * core_if,
+                                             dwc_ep_t * ep);
+#endif /* DWC_EN_ISOC */
+/**@}*/
+
+/** @name Host CIL Functions
+ * The following functions support managing the DWC_otg controller in host
+ * mode.
+ */
+/**@{*/
+extern void dwc_otg_hc_init(dwc_otg_core_if_t * _core_if, dwc_hc_t * _hc);
+extern void dwc_otg_hc_halt(dwc_otg_core_if_t * _core_if,
+                           dwc_hc_t * _hc, dwc_otg_halt_status_e _halt_status);
+extern void dwc_otg_hc_cleanup(dwc_otg_core_if_t * _core_if, dwc_hc_t * _hc);
+extern void dwc_otg_hc_start_transfer(dwc_otg_core_if_t * _core_if,
+                                     dwc_hc_t * _hc);
+extern int dwc_otg_hc_continue_transfer(dwc_otg_core_if_t * _core_if,
+                                       dwc_hc_t * _hc);
+extern void dwc_otg_hc_do_ping(dwc_otg_core_if_t * _core_if, dwc_hc_t * _hc);
+extern void dwc_otg_hc_write_packet(dwc_otg_core_if_t * _core_if,
+                                   dwc_hc_t * _hc);
+extern void dwc_otg_enable_host_interrupts(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_disable_host_interrupts(dwc_otg_core_if_t * _core_if);
+
+extern void dwc_otg_hc_start_transfer_ddma(dwc_otg_core_if_t * core_if,
+                                          dwc_hc_t * hc);
+
+extern uint32_t calc_frame_interval(dwc_otg_core_if_t * core_if);
+
+/* Macro used to clear one channel interrupt */
+#define clear_hc_int(_hc_regs_, _intr_) \
+do { \
+       hcint_data_t hcint_clear = {.d32 = 0}; \
+       hcint_clear.b._intr_ = 1; \
+       DWC_WRITE_REG32(&(_hc_regs_)->hcint, hcint_clear.d32); \
+} while (0)
+
+/*
+ * Macro used to disable one channel interrupt. Channel interrupts are
+ * disabled when the channel is halted or released by the interrupt handler.
+ * There is no need to handle further interrupts of that type until the
+ * channel is re-assigned. In fact, subsequent handling may cause crashes
+ * because the channel structures are cleaned up when the channel is released.
+ */
+#define disable_hc_int(_hc_regs_, _intr_) \
+do { \
+       hcintmsk_data_t hcintmsk = {.d32 = 0}; \
+       hcintmsk.b._intr_ = 1; \
+       DWC_MODIFY_REG32(&(_hc_regs_)->hcintmsk, hcintmsk.d32, 0); \
+} while (0)
+
+/**
+ * This function Reads HPRT0 in preparation to modify. It keeps the
+ * WC bits 0 so that if they are read as 1, they won't clear when you
+ * write it back
+ */
+static inline uint32_t dwc_otg_read_hprt0(dwc_otg_core_if_t * _core_if)
+{
+       hprt0_data_t hprt0;
+       hprt0.d32 = DWC_READ_REG32(_core_if->host_if->hprt0);
+       hprt0.b.prtena = 0;
+       hprt0.b.prtconndet = 0;
+       hprt0.b.prtenchng = 0;
+       hprt0.b.prtovrcurrchng = 0;
+       return hprt0.d32;
+}
+
+/**@}*/
+
+/** @name Common CIL Functions
+ * The following functions support managing the DWC_otg controller in either
+ * device or host mode.
+ */
+/**@{*/
+
+extern void dwc_otg_read_packet(dwc_otg_core_if_t * core_if,
+                               uint8_t * dest, uint16_t bytes);
+
+extern void dwc_otg_flush_tx_fifo(dwc_otg_core_if_t * _core_if, const int _num);
+extern void dwc_otg_flush_rx_fifo(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_core_reset(dwc_otg_core_if_t * _core_if);
+
+/**
+ * This function returns the Core Interrupt register.
+ */
+static inline uint32_t dwc_otg_read_core_intr(dwc_otg_core_if_t * core_if)
+{
+       return (DWC_READ_REG32(&core_if->core_global_regs->gintsts) &
+               DWC_READ_REG32(&core_if->core_global_regs->gintmsk));
+}
+
+/**
+ * This function returns the OTG Interrupt register.
+ */
+static inline uint32_t dwc_otg_read_otg_intr(dwc_otg_core_if_t * core_if)
+{
+       return (DWC_READ_REG32(&core_if->core_global_regs->gotgint));
+}
+
+/**
+ * This function reads the Device All Endpoints Interrupt register and
+ * returns the IN endpoint interrupt bits.
+ */
+static inline uint32_t dwc_otg_read_dev_all_in_ep_intr(dwc_otg_core_if_t *
+                                                      core_if)
+{
+
+       uint32_t v;
+
+       if (core_if->multiproc_int_enable) {
+               v = DWC_READ_REG32(&core_if->dev_if->
+                                  dev_global_regs->deachint) &
+                   DWC_READ_REG32(&core_if->
+                                  dev_if->dev_global_regs->deachintmsk);
+       } else {
+               v = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->daint) &
+                   DWC_READ_REG32(&core_if->dev_if->dev_global_regs->daintmsk);
+       }
+       return (v & 0xffff);
+}
+
+/**
+ * This function reads the Device All Endpoints Interrupt register and
+ * returns the OUT endpoint interrupt bits.
+ */
+static inline uint32_t dwc_otg_read_dev_all_out_ep_intr(dwc_otg_core_if_t *
+                                                       core_if)
+{
+       uint32_t v;
+
+       if (core_if->multiproc_int_enable) {
+               v = DWC_READ_REG32(&core_if->dev_if->
+                                  dev_global_regs->deachint) &
+                   DWC_READ_REG32(&core_if->
+                                  dev_if->dev_global_regs->deachintmsk);
+       } else {
+               v = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->daint) &
+                   DWC_READ_REG32(&core_if->dev_if->dev_global_regs->daintmsk);
+       }
+
+       return ((v & 0xffff0000) >> 16);
+}
+
+/**
+ * This function returns the Device IN EP Interrupt register
+ */
+static inline uint32_t dwc_otg_read_dev_in_ep_intr(dwc_otg_core_if_t * core_if,
+                                                  dwc_ep_t * ep)
+{
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       uint32_t v, msk, emp;
+
+       if (core_if->multiproc_int_enable) {
+               msk =
+                   DWC_READ_REG32(&dev_if->
+                                  dev_global_regs->diepeachintmsk[ep->num]);
+               emp =
+                   DWC_READ_REG32(&dev_if->
+                                  dev_global_regs->dtknqr4_fifoemptymsk);
+               msk |= ((emp >> ep->num) & 0x1) << 7;
+               v = DWC_READ_REG32(&dev_if->in_ep_regs[ep->num]->diepint) & msk;
+       } else {
+               msk = DWC_READ_REG32(&dev_if->dev_global_regs->diepmsk);
+               emp =
+                   DWC_READ_REG32(&dev_if->
+                                  dev_global_regs->dtknqr4_fifoemptymsk);
+               msk |= ((emp >> ep->num) & 0x1) << 7;
+               v = DWC_READ_REG32(&dev_if->in_ep_regs[ep->num]->diepint) & msk;
+       }
+
+       return v;
+}
+
+/**
+ * This function returns the Device OUT EP Interrupt register
+ */
+static inline uint32_t dwc_otg_read_dev_out_ep_intr(dwc_otg_core_if_t *
+                                                   _core_if, dwc_ep_t * _ep)
+{
+       dwc_otg_dev_if_t *dev_if = _core_if->dev_if;
+       uint32_t v;
+       doepmsk_data_t msk = {.d32 = 0 };
+
+       if (_core_if->multiproc_int_enable) {
+               msk.d32 =
+                   DWC_READ_REG32(&dev_if->
+                                  dev_global_regs->doepeachintmsk[_ep->num]);
+               if (_core_if->pti_enh_enable) {
+                       msk.b.pktdrpsts = 1;
+               }
+               v = DWC_READ_REG32(&dev_if->
+                                  out_ep_regs[_ep->num]->doepint) & msk.d32;
+       } else {
+               msk.d32 = DWC_READ_REG32(&dev_if->dev_global_regs->doepmsk);
+               if (_core_if->pti_enh_enable) {
+                       msk.b.pktdrpsts = 1;
+               }
+               v = DWC_READ_REG32(&dev_if->
+                                  out_ep_regs[_ep->num]->doepint) & msk.d32;
+       }
+       return v;
+}
+
+/**
+ * This function returns the Host All Channel Interrupt register
+ */
+static inline uint32_t dwc_otg_read_host_all_channels_intr(dwc_otg_core_if_t *
+                                                          _core_if)
+{
+       return (DWC_READ_REG32(&_core_if->host_if->host_global_regs->haint));
+}
+
+static inline uint32_t dwc_otg_read_host_channel_intr(dwc_otg_core_if_t *
+                                                     _core_if, dwc_hc_t * _hc)
+{
+       return (DWC_READ_REG32
+               (&_core_if->host_if->hc_regs[_hc->hc_num]->hcint));
+}
+
+/**
+ * This function returns the mode of the operation, host or device.
+ *
+ * @return 0 - Device Mode, 1 - Host Mode
+ */
+static inline uint32_t dwc_otg_mode(dwc_otg_core_if_t * _core_if)
+{
+       return (DWC_READ_REG32(&_core_if->core_global_regs->gintsts) & 0x1);
+}
+
+/**@}*/
+
+/**
+ * DWC_otg CIL callback structure. This structure allows the HCD and
+ * PCD to register functions used for starting and stopping the PCD
+ * and HCD for role change on for a DRD.
+ */
+typedef struct dwc_otg_cil_callbacks {
+       /** Start function for role change */
+       int (*start) (void *_p);
+       /** Stop Function for role change */
+       int (*stop) (void *_p);
+       /** Disconnect Function for role change */
+       int (*disconnect) (void *_p);
+       /** Resume/Remote wakeup Function */
+       int (*resume_wakeup) (void *_p);
+       /** Suspend function */
+       int (*suspend) (void *_p);
+       /** Session Start (SRP) */
+       int (*session_start) (void *_p);
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       /** Sleep (switch to L0 state) */
+       int (*sleep) (void *_p);
+#endif
+       /** Pointer passed to start() and stop() */
+       void *p;
+} dwc_otg_cil_callbacks_t;
+
+extern void dwc_otg_cil_register_pcd_callbacks(dwc_otg_core_if_t * _core_if,
+                                              dwc_otg_cil_callbacks_t * _cb,
+                                              void *_p);
+extern void dwc_otg_cil_register_hcd_callbacks(dwc_otg_core_if_t * _core_if,
+                                              dwc_otg_cil_callbacks_t * _cb,
+                                              void *_p);
+
+void dwc_otg_initiate_srp(dwc_otg_core_if_t * core_if);
+
+//////////////////////////////////////////////////////////////////////
+/** Start the HCD.  Helper function for using the HCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_hcd_start(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->hcd_cb && core_if->hcd_cb->start) {
+               core_if->hcd_cb->start(core_if->hcd_cb->p);
+       }
+}
+
+/** Stop the HCD.  Helper function for using the HCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_hcd_stop(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->hcd_cb && core_if->hcd_cb->stop) {
+               core_if->hcd_cb->stop(core_if->hcd_cb->p);
+       }
+}
+
+/** Disconnect the HCD.  Helper function for using the HCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_hcd_disconnect(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->hcd_cb && core_if->hcd_cb->disconnect) {
+               core_if->hcd_cb->disconnect(core_if->hcd_cb->p);
+       }
+}
+
+/** Inform the HCD the a New Session has begun.  Helper function for
+ * using the HCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_hcd_session_start(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->hcd_cb && core_if->hcd_cb->session_start) {
+               core_if->hcd_cb->session_start(core_if->hcd_cb->p);
+       }
+}
+
+#ifdef CONFIG_USB_DWC_OTG_LPM
+/**
+ * Inform the HCD about LPM sleep.
+ * Helper function for using the HCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_hcd_sleep(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->hcd_cb && core_if->hcd_cb->sleep) {
+               core_if->hcd_cb->sleep(core_if->hcd_cb->p);
+       }
+}
+#endif
+
+/** Resume the HCD.  Helper function for using the HCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_hcd_resume(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->hcd_cb && core_if->hcd_cb->resume_wakeup) {
+               core_if->hcd_cb->resume_wakeup(core_if->hcd_cb->p);
+       }
+}
+
+/** Start the PCD.  Helper function for using the PCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_pcd_start(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->pcd_cb && core_if->pcd_cb->start) {
+               core_if->pcd_cb->start(core_if->pcd_cb->p);
+       }
+}
+
+/** Stop the PCD.  Helper function for using the PCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_pcd_stop(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->pcd_cb && core_if->pcd_cb->stop) {
+               core_if->pcd_cb->stop(core_if->pcd_cb->p);
+       }
+}
+
+/** Suspend the PCD.  Helper function for using the PCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_pcd_suspend(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->pcd_cb && core_if->pcd_cb->suspend) {
+               core_if->pcd_cb->suspend(core_if->pcd_cb->p);
+       }
+}
+
+/** Resume the PCD.  Helper function for using the PCD callbacks.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static inline void cil_pcd_resume(dwc_otg_core_if_t * core_if)
+{
+       if (core_if->pcd_cb && core_if->pcd_cb->resume_wakeup) {
+               core_if->pcd_cb->resume_wakeup(core_if->pcd_cb->p);
+       }
+}
+
+//////////////////////////////////////////////////////////////////////
+
+#endif
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_cil_intr.c
@@ -0,0 +1,1601 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_cil_intr.c $
+ * $Revision: #32 $
+ * $Date: 2012/08/10 $
+ * $Change: 2047372 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+/** @file
+ *
+ * The Core Interface Layer provides basic services for accessing and
+ * managing the DWC_otg hardware. These services are used by both the
+ * Host Controller Driver and the Peripheral Controller Driver.
+ *
+ * This file contains the Common Interrupt handlers.
+ */
+#include "dwc_os.h"
+#include "dwc_otg_regs.h"
+#include "dwc_otg_cil.h"
+#include "dwc_otg_driver.h"
+#include "dwc_otg_pcd.h"
+#include "dwc_otg_hcd.h"
+
+#ifdef DEBUG
+inline const char *op_state_str(dwc_otg_core_if_t * core_if)
+{
+       return (core_if->op_state == A_HOST ? "a_host" :
+               (core_if->op_state == A_SUSPEND ? "a_suspend" :
+                (core_if->op_state == A_PERIPHERAL ? "a_peripheral" :
+                 (core_if->op_state == B_PERIPHERAL ? "b_peripheral" :
+                  (core_if->op_state == B_HOST ? "b_host" : "unknown")))));
+}
+#endif
+
+/** This function will log a debug message
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+int32_t dwc_otg_handle_mode_mismatch_intr(dwc_otg_core_if_t * core_if)
+{
+       gintsts_data_t gintsts;
+       DWC_WARN("Mode Mismatch Interrupt: currently in %s mode\n",
+                dwc_otg_mode(core_if) ? "Host" : "Device");
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.modemismatch = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+       return 1;
+}
+
+/**
+ * This function handles the OTG Interrupts. It reads the OTG
+ * Interrupt Register (GOTGINT) to determine what interrupt has
+ * occurred.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+int32_t dwc_otg_handle_otg_intr(dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       gotgint_data_t gotgint;
+       gotgctl_data_t gotgctl;
+       gintmsk_data_t gintmsk;
+       gpwrdn_data_t gpwrdn;
+
+       gotgint.d32 = DWC_READ_REG32(&global_regs->gotgint);
+       gotgctl.d32 = DWC_READ_REG32(&global_regs->gotgctl);
+       DWC_DEBUGPL(DBG_CIL, "++OTG Interrupt gotgint=%0x [%s]\n", gotgint.d32,
+                   op_state_str(core_if));
+
+       if (gotgint.b.sesenddet) {
+               DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: "
+                           "Session End Detected++ (%s)\n",
+                           op_state_str(core_if));
+               gotgctl.d32 = DWC_READ_REG32(&global_regs->gotgctl);
+
+               if (core_if->op_state == B_HOST) {
+                       cil_pcd_start(core_if);
+                       core_if->op_state = B_PERIPHERAL;
+               } else {
+                       /* If not B_HOST and Device HNP still set. HNP
+                        * Did not succeed!*/
+                       if (gotgctl.b.devhnpen) {
+                               DWC_DEBUGPL(DBG_ANY, "Session End Detected\n");
+                               __DWC_ERROR("Device Not Connected/Responding!\n");
+                       }
+
+                       /* If Session End Detected the B-Cable has
+                        * been disconnected. */
+                       /* Reset PCD and Gadget driver to a
+                        * clean state. */
+                       core_if->lx_state = DWC_OTG_L0;
+                       DWC_SPINUNLOCK(core_if->lock);
+                       cil_pcd_stop(core_if);
+                       DWC_SPINLOCK(core_if->lock);
+
+                       if (core_if->adp_enable) {
+                               if (core_if->power_down == 2) {
+                                       gpwrdn.d32 = 0;
+                                       gpwrdn.b.pwrdnswtch = 1;
+                                       DWC_MODIFY_REG32(&core_if->
+                                                        core_global_regs->
+                                                        gpwrdn, gpwrdn.d32, 0);
+                               }
+
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pmuintsel = 1;
+                               gpwrdn.b.pmuactv = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+
+                               dwc_otg_adp_sense_start(core_if);
+                       }
+               }
+
+               gotgctl.d32 = 0;
+               gotgctl.b.devhnpen = 1;
+               DWC_MODIFY_REG32(&global_regs->gotgctl, gotgctl.d32, 0);
+       }
+       if (gotgint.b.sesreqsucstschng) {
+               DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: "
+                           "Session Reqeust Success Status Change++\n");
+               gotgctl.d32 = DWC_READ_REG32(&global_regs->gotgctl);
+               if (gotgctl.b.sesreqscs) {
+
+                       if ((core_if->core_params->phy_type ==
+                            DWC_PHY_TYPE_PARAM_FS) && (core_if->core_params->i2c_enable)) {
+                               core_if->srp_success = 1;
+                       } else {
+                               DWC_SPINUNLOCK(core_if->lock);
+                               cil_pcd_resume(core_if);
+                               DWC_SPINLOCK(core_if->lock);
+                               /* Clear Session Request */
+                               gotgctl.d32 = 0;
+                               gotgctl.b.sesreq = 1;
+                               DWC_MODIFY_REG32(&global_regs->gotgctl,
+                                                gotgctl.d32, 0);
+                       }
+               }
+       }
+       if (gotgint.b.hstnegsucstschng) {
+               /* Print statements during the HNP interrupt handling
+                * can cause it to fail.*/
+               gotgctl.d32 = DWC_READ_REG32(&global_regs->gotgctl);
+               /* WA for 3.00a- HW is not setting cur_mode, even sometimes
+                * this does not help*/
+               if (core_if->snpsid >= OTG_CORE_REV_3_00a)
+                       dwc_udelay(100);
+               if (gotgctl.b.hstnegscs) {
+                       if (dwc_otg_is_host_mode(core_if)) {
+                               core_if->op_state = B_HOST;
+                               /*
+                                * Need to disable SOF interrupt immediately.
+                                * When switching from device to host, the PCD
+                                * interrupt handler won't handle the
+                                * interrupt if host mode is already set. The
+                                * HCD interrupt handler won't get called if
+                                * the HCD state is HALT. This means that the
+                                * interrupt does not get handled and Linux
+                                * complains loudly.
+                                */
+                               gintmsk.d32 = 0;
+                               gintmsk.b.sofintr = 1;
+                               DWC_MODIFY_REG32(&global_regs->gintmsk,
+                                                gintmsk.d32, 0);
+                               /* Call callback function with spin lock released */
+                               DWC_SPINUNLOCK(core_if->lock);
+                               cil_pcd_stop(core_if);
+                               /*
+                                * Initialize the Core for Host mode.
+                                */
+                               cil_hcd_start(core_if);
+                               DWC_SPINLOCK(core_if->lock);
+                               core_if->op_state = B_HOST;
+                       }
+               } else {
+                       gotgctl.d32 = 0;
+                       gotgctl.b.hnpreq = 1;
+                       gotgctl.b.devhnpen = 1;
+                       DWC_MODIFY_REG32(&global_regs->gotgctl, gotgctl.d32, 0);
+                       DWC_DEBUGPL(DBG_ANY, "HNP Failed\n");
+                       __DWC_ERROR("Device Not Connected/Responding\n");
+               }
+       }
+       if (gotgint.b.hstnegdet) {
+               /* The disconnect interrupt is set at the same time as
+                * Host Negotiation Detected.  During the mode
+                * switch all interrupts are cleared so the disconnect
+                * interrupt handler will not get executed.
+                */
+               DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: "
+                           "Host Negotiation Detected++ (%s)\n",
+                           (dwc_otg_is_host_mode(core_if) ? "Host" :
+                            "Device"));
+               if (dwc_otg_is_device_mode(core_if)) {
+                       DWC_DEBUGPL(DBG_ANY, "a_suspend->a_peripheral (%d)\n",
+                                   core_if->op_state);
+                       DWC_SPINUNLOCK(core_if->lock);
+                       cil_hcd_disconnect(core_if);
+                       cil_pcd_start(core_if);
+                       DWC_SPINLOCK(core_if->lock);
+                       core_if->op_state = A_PERIPHERAL;
+               } else {
+                       /*
+                        * Need to disable SOF interrupt immediately. When
+                        * switching from device to host, the PCD interrupt
+                        * handler won't handle the interrupt if host mode is
+                        * already set. The HCD interrupt handler won't get
+                        * called if the HCD state is HALT. This means that
+                        * the interrupt does not get handled and Linux
+                        * complains loudly.
+                        */
+                       gintmsk.d32 = 0;
+                       gintmsk.b.sofintr = 1;
+                       DWC_MODIFY_REG32(&global_regs->gintmsk, gintmsk.d32, 0);
+                       DWC_SPINUNLOCK(core_if->lock);
+                       cil_pcd_stop(core_if);
+                       cil_hcd_start(core_if);
+                       DWC_SPINLOCK(core_if->lock);
+                       core_if->op_state = A_HOST;
+               }
+       }
+       if (gotgint.b.adevtoutchng) {
+               DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: "
+                           "A-Device Timeout Change++\n");
+       }
+       if (gotgint.b.debdone) {
+               DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: " "Debounce Done++\n");
+       }
+
+       /* Clear GOTGINT */
+       DWC_WRITE_REG32(&core_if->core_global_regs->gotgint, gotgint.d32);
+
+       return 1;
+}
+
+void w_conn_id_status_change(void *p)
+{
+       dwc_otg_core_if_t *core_if = p;
+       uint32_t count = 0;
+       gotgctl_data_t gotgctl = {.d32 = 0 };
+
+       gotgctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
+       DWC_DEBUGPL(DBG_CIL, "gotgctl=%0x\n", gotgctl.d32);
+       DWC_DEBUGPL(DBG_CIL, "gotgctl.b.conidsts=%d\n", gotgctl.b.conidsts);
+
+       /* B-Device connector (Device Mode) */
+       if (gotgctl.b.conidsts) {
+               /* Wait for switch to device mode. */
+               while (!dwc_otg_is_device_mode(core_if)) {
+                       DWC_PRINTF("Waiting for Peripheral Mode, Mode=%s\n",
+                                  (dwc_otg_is_host_mode(core_if) ? "Host" :
+                                   "Peripheral"));
+                       dwc_mdelay(100);
+                       if (++count > 10000)
+                               break;
+               }
+               DWC_ASSERT(++count < 10000,
+                          "Connection id status change timed out");
+               core_if->op_state = B_PERIPHERAL;
+               dwc_otg_core_init(core_if);
+               dwc_otg_enable_global_interrupts(core_if);
+               cil_pcd_start(core_if);
+       } else {
+               /* A-Device connector (Host Mode) */
+               while (!dwc_otg_is_host_mode(core_if)) {
+                       DWC_PRINTF("Waiting for Host Mode, Mode=%s\n",
+                                  (dwc_otg_is_host_mode(core_if) ? "Host" :
+                                   "Peripheral"));
+                       dwc_mdelay(100);
+                       if (++count > 10000)
+                               break;
+               }
+               DWC_ASSERT(++count < 10000,
+                          "Connection id status change timed out");
+               core_if->op_state = A_HOST;
+               /*
+                * Initialize the Core for Host mode.
+                */
+               dwc_otg_core_init(core_if);
+               dwc_otg_enable_global_interrupts(core_if);
+               cil_hcd_start(core_if);
+       }
+}
+
+/**
+ * This function handles the Connector ID Status Change Interrupt.  It
+ * reads the OTG Interrupt Register (GOTCTL) to determine whether this
+ * is a Device to Host Mode transition or a Host Mode to Device
+ * Transition.
+ *
+ * This only occurs when the cable is connected/removed from the PHY
+ * connector.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+int32_t dwc_otg_handle_conn_id_status_change_intr(dwc_otg_core_if_t * core_if)
+{
+
+       /*
+        * Need to disable SOF interrupt immediately. If switching from device
+        * to host, the PCD interrupt handler won't handle the interrupt if
+        * host mode is already set. The HCD interrupt handler won't get
+        * called if the HCD state is HALT. This means that the interrupt does
+        * not get handled and Linux complains loudly.
+        */
+       gintmsk_data_t gintmsk = {.d32 = 0 };
+       gintsts_data_t gintsts = {.d32 = 0 };
+
+       gintmsk.b.sofintr = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk, gintmsk.d32, 0);
+
+       DWC_DEBUGPL(DBG_CIL,
+                   " ++Connector ID Status Change Interrupt++  (%s)\n",
+                   (dwc_otg_is_host_mode(core_if) ? "Host" : "Device"));
+
+       DWC_SPINUNLOCK(core_if->lock);
+
+       /*
+        * Need to schedule a work, as there are possible DELAY function calls
+        * Release lock before scheduling workq as it holds spinlock during scheduling
+        */
+
+       DWC_WORKQ_SCHEDULE(core_if->wq_otg, w_conn_id_status_change,
+                          core_if, "connection id status change");
+       DWC_SPINLOCK(core_if->lock);
+
+       /* Set flag and clear interrupt */
+       gintsts.b.conidstschng = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * This interrupt indicates that a device is initiating the Session
+ * Request Protocol to request the host to turn on bus power so a new
+ * session can begin. The handler responds by turning on bus power. If
+ * the DWC_otg controller is in low power mode, the handler brings the
+ * controller out of low power mode before turning on bus power.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+int32_t dwc_otg_handle_session_req_intr(dwc_otg_core_if_t * core_if)
+{
+       gintsts_data_t gintsts;
+
+#ifndef DWC_HOST_ONLY
+       DWC_DEBUGPL(DBG_ANY, "++Session Request Interrupt++\n");
+
+       if (dwc_otg_is_device_mode(core_if)) {
+               DWC_PRINTF("SRP: Device mode\n");
+       } else {
+               hprt0_data_t hprt0;
+               DWC_PRINTF("SRP: Host mode\n");
+
+               /* Turn on the port power bit. */
+               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+               hprt0.b.prtpwr = 1;
+               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+
+               /* Start the Connection timer. So a message can be displayed
+                * if connect does not occur within 10 seconds. */
+               cil_hcd_session_start(core_if);
+       }
+#endif
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.sessreqintr = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+       return 1;
+}
+
+void w_wakeup_detected(void *p)
+{
+       dwc_otg_core_if_t *core_if = (dwc_otg_core_if_t *) p;
+       /*
+        * Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms
+        * so that OPT tests pass with all PHYs).
+        */
+       hprt0_data_t hprt0 = {.d32 = 0 };
+#if 0
+       pcgcctl_data_t pcgcctl = {.d32 = 0 };
+       /* Restart the Phy Clock */
+       pcgcctl.b.stoppclk = 1;
+       DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32, 0);
+       dwc_udelay(10);
+#endif //0
+       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+       DWC_DEBUGPL(DBG_ANY, "Resume: HPRT0=%0x\n", hprt0.d32);
+//      dwc_mdelay(70);
+       hprt0.b.prtres = 0;     /* Resume */
+       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+       DWC_DEBUGPL(DBG_ANY, "Clear Resume: HPRT0=%0x\n",
+                   DWC_READ_REG32(core_if->host_if->hprt0));
+
+       cil_hcd_resume(core_if);
+
+       /** Change to L0 state*/
+       core_if->lx_state = DWC_OTG_L0;
+}
+
+/**
+ * This interrupt indicates that the DWC_otg controller has detected a
+ * resume or remote wakeup sequence. If the DWC_otg controller is in
+ * low power mode, the handler must brings the controller out of low
+ * power mode. The controller automatically begins resume
+ * signaling. The handler schedules a time to stop resume signaling.
+ */
+int32_t dwc_otg_handle_wakeup_detected_intr(dwc_otg_core_if_t * core_if)
+{
+       gintsts_data_t gintsts;
+
+       DWC_DEBUGPL(DBG_ANY,
+                   "++Resume and Remote Wakeup Detected Interrupt++\n");
+
+       DWC_PRINTF("%s lxstate = %d\n", __func__, core_if->lx_state);
+
+       if (dwc_otg_is_device_mode(core_if)) {
+               dctl_data_t dctl = {.d32 = 0 };
+               DWC_DEBUGPL(DBG_PCD, "DSTS=0x%0x\n",
+                           DWC_READ_REG32(&core_if->dev_if->dev_global_regs->
+                                          dsts));
+               if (core_if->lx_state == DWC_OTG_L2) {
+#ifdef PARTIAL_POWER_DOWN
+                       if (core_if->hwcfg4.b.power_optimiz) {
+                               pcgcctl_data_t power = {.d32 = 0 };
+
+                               power.d32 = DWC_READ_REG32(core_if->pcgcctl);
+                               DWC_DEBUGPL(DBG_CIL, "PCGCCTL=%0x\n",
+                                           power.d32);
+
+                               power.b.stoppclk = 0;
+                               DWC_WRITE_REG32(core_if->pcgcctl, power.d32);
+
+                               power.b.pwrclmp = 0;
+                               DWC_WRITE_REG32(core_if->pcgcctl, power.d32);
+
+                               power.b.rstpdwnmodule = 0;
+                               DWC_WRITE_REG32(core_if->pcgcctl, power.d32);
+                       }
+#endif
+                       /* Clear the Remote Wakeup Signaling */
+                       dctl.b.rmtwkupsig = 1;
+                       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->
+                                        dctl, dctl.d32, 0);
+
+                       DWC_SPINUNLOCK(core_if->lock);
+                       if (core_if->pcd_cb && core_if->pcd_cb->resume_wakeup) {
+                               core_if->pcd_cb->resume_wakeup(core_if->pcd_cb->p);
+                       }
+                       DWC_SPINLOCK(core_if->lock);
+               } else {
+                       glpmcfg_data_t lpmcfg;
+                       lpmcfg.d32 =
+                           DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+                       lpmcfg.b.hird_thres &= (~(1 << 4));
+                       DWC_WRITE_REG32(&core_if->core_global_regs->glpmcfg,
+                                       lpmcfg.d32);
+               }
+               /** Change to L0 state*/
+               core_if->lx_state = DWC_OTG_L0;
+       } else {
+               if (core_if->lx_state != DWC_OTG_L1) {
+                       pcgcctl_data_t pcgcctl = {.d32 = 0 };
+
+                       /* Restart the Phy Clock */
+                       pcgcctl.b.stoppclk = 1;
+                       DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32, 0);
+                       DWC_TIMER_SCHEDULE(core_if->wkp_timer, 71);
+               } else {
+                       /** Change to L0 state*/
+                       core_if->lx_state = DWC_OTG_L0;
+               }
+       }
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.wkupintr = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * This interrupt indicates that the Wakeup Logic has detected a
+ * Device disconnect.
+ */
+static int32_t dwc_otg_handle_pwrdn_disconnect_intr(dwc_otg_core_if_t *core_if)
+{
+       gpwrdn_data_t gpwrdn = { .d32 = 0 };
+       gpwrdn_data_t gpwrdn_temp = { .d32 = 0 };
+       gpwrdn_temp.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+
+       DWC_PRINTF("%s called\n", __FUNCTION__);
+
+       if (!core_if->hibernation_suspend) {
+               DWC_PRINTF("Already exited from Hibernation\n");
+               return 1;
+       }
+
+       /* Switch on the voltage to the core */
+       gpwrdn.b.pwrdnswtch = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Reset the core */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Disable power clamps*/
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnclmp = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       /* Remove reset the core signal */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+       dwc_udelay(10);
+
+       /* Disable PMU interrupt */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuintsel = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       core_if->hibernation_suspend = 0;
+
+       /* Disable PMU */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuactv = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       if (gpwrdn_temp.b.idsts) {
+               core_if->op_state = B_PERIPHERAL;
+               dwc_otg_core_init(core_if);
+               dwc_otg_enable_global_interrupts(core_if);
+               cil_pcd_start(core_if);
+       } else {
+               core_if->op_state = A_HOST;
+               dwc_otg_core_init(core_if);
+               dwc_otg_enable_global_interrupts(core_if);
+               cil_hcd_start(core_if);
+       }
+
+       return 1;
+}
+
+/**
+ * This interrupt indicates that the Wakeup Logic has detected a
+ * remote wakeup sequence.
+ */
+static int32_t dwc_otg_handle_pwrdn_wakeup_detected_intr(dwc_otg_core_if_t * core_if)
+{
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+       DWC_DEBUGPL(DBG_ANY,
+                   "++Powerdown Remote Wakeup Detected Interrupt++\n");
+
+       if (!core_if->hibernation_suspend) {
+               DWC_PRINTF("Already exited from Hibernation\n");
+               return 1;
+       }
+
+       gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+       if (gpwrdn.b.idsts) {   // Device Mode
+               if ((core_if->power_down == 2)
+                   && (core_if->hibernation_suspend == 1)) {
+                       dwc_otg_device_hibernation_restore(core_if, 0, 0);
+               }
+       } else {
+               if ((core_if->power_down == 2)
+                   && (core_if->hibernation_suspend == 1)) {
+                       dwc_otg_host_hibernation_restore(core_if, 1, 0);
+               }
+       }
+       return 1;
+}
+
+static int32_t dwc_otg_handle_pwrdn_idsts_change(dwc_otg_device_t *otg_dev)
+{
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+       gpwrdn_data_t gpwrdn_temp = {.d32 = 0 };
+       dwc_otg_core_if_t *core_if = otg_dev->core_if;
+
+       DWC_DEBUGPL(DBG_ANY, "%s called\n", __FUNCTION__);
+       gpwrdn_temp.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+       if (core_if->power_down == 2) {
+               if (!core_if->hibernation_suspend) {
+                       DWC_PRINTF("Already exited from Hibernation\n");
+                       return 1;
+               }
+               DWC_DEBUGPL(DBG_ANY, "Exit from hibernation on ID sts change\n");
+               /* Switch on the voltage to the core */
+               gpwrdn.b.pwrdnswtch = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               dwc_udelay(10);
+
+               /* Reset the core */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pwrdnrstn = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               dwc_udelay(10);
+
+               /* Disable power clamps */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pwrdnclmp = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+               /* Remove reset the core signal */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pwrdnrstn = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+               dwc_udelay(10);
+
+               /* Disable PMU interrupt */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pmuintsel = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+               /*Indicates that we are exiting from hibernation */
+               core_if->hibernation_suspend = 0;
+
+               /* Disable PMU */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pmuactv = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               dwc_udelay(10);
+
+               gpwrdn.d32 = core_if->gr_backup->gpwrdn_local;
+               if (gpwrdn.b.dis_vbus == 1) {
+                       gpwrdn.d32 = 0;
+                       gpwrdn.b.dis_vbus = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               }
+
+               if (gpwrdn_temp.b.idsts) {
+                       core_if->op_state = B_PERIPHERAL;
+                       dwc_otg_core_init(core_if);
+                       dwc_otg_enable_global_interrupts(core_if);
+                       cil_pcd_start(core_if);
+               } else {
+                       core_if->op_state = A_HOST;
+                       dwc_otg_core_init(core_if);
+                       dwc_otg_enable_global_interrupts(core_if);
+                       cil_hcd_start(core_if);
+               }
+       }
+
+       if (core_if->adp_enable) {
+               uint8_t is_host = 0;
+               DWC_SPINUNLOCK(core_if->lock);
+               /* Change the core_if's lock to hcd/pcd lock depend on mode? */
+#ifndef DWC_HOST_ONLY
+               if (gpwrdn_temp.b.idsts)
+                       core_if->lock = otg_dev->pcd->lock;
+#endif
+#ifndef DWC_DEVICE_ONLY
+               if (!gpwrdn_temp.b.idsts) {
+                               core_if->lock = otg_dev->hcd->lock;
+                               is_host = 1;
+               }
+#endif
+               DWC_PRINTF("RESTART ADP\n");
+               if (core_if->adp.probe_enabled)
+                       dwc_otg_adp_probe_stop(core_if);
+               if (core_if->adp.sense_enabled)
+                       dwc_otg_adp_sense_stop(core_if);
+               if (core_if->adp.sense_timer_started)
+                       DWC_TIMER_CANCEL(core_if->adp.sense_timer);
+               if (core_if->adp.vbuson_timer_started)
+                       DWC_TIMER_CANCEL(core_if->adp.vbuson_timer);
+               core_if->adp.probe_timer_values[0] = -1;
+               core_if->adp.probe_timer_values[1] = -1;
+               core_if->adp.sense_timer_started = 0;
+               core_if->adp.vbuson_timer_started = 0;
+               core_if->adp.probe_counter = 0;
+               core_if->adp.gpwrdn = 0;
+
+               /* Disable PMU and restart ADP */
+               gpwrdn_temp.d32 = 0;
+               gpwrdn_temp.b.pmuactv = 1;
+               gpwrdn_temp.b.pmuintsel = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               DWC_PRINTF("Check point 1\n");
+               dwc_mdelay(110);
+               dwc_otg_adp_start(core_if, is_host);
+               DWC_SPINLOCK(core_if->lock);
+       }
+
+
+       return 1;
+}
+
+static int32_t dwc_otg_handle_pwrdn_session_change(dwc_otg_core_if_t * core_if)
+{
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+       int32_t otg_cap_param = core_if->core_params->otg_cap;
+       DWC_DEBUGPL(DBG_ANY, "%s called\n", __FUNCTION__);
+
+       gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+       if (core_if->power_down == 2) {
+               if (!core_if->hibernation_suspend) {
+                       DWC_PRINTF("Already exited from Hibernation\n");
+                       return 1;
+               }
+
+               if ((otg_cap_param != DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE ||
+                        otg_cap_param != DWC_OTG_CAP_PARAM_SRP_ONLY_CAPABLE) &&
+                       gpwrdn.b.bsessvld == 0) {
+                       /* Save gpwrdn register for further usage if stschng interrupt */
+                       core_if->gr_backup->gpwrdn_local =
+                               DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+                       /*Exit from ISR and wait for stschng interrupt with bsessvld = 1 */
+                       return 1;
+               }
+
+               /* Switch on the voltage to the core */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pwrdnswtch = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               dwc_udelay(10);
+
+               /* Reset the core */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pwrdnrstn = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               dwc_udelay(10);
+
+               /* Disable power clamps */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pwrdnclmp = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+               /* Remove reset the core signal */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pwrdnrstn = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+               dwc_udelay(10);
+
+               /* Disable PMU interrupt */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pmuintsel = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               dwc_udelay(10);
+
+               /*Indicates that we are exiting from hibernation */
+               core_if->hibernation_suspend = 0;
+
+               /* Disable PMU */
+               gpwrdn.d32 = 0;
+               gpwrdn.b.pmuactv = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+               dwc_udelay(10);
+
+               core_if->op_state = B_PERIPHERAL;
+               dwc_otg_core_init(core_if);
+               dwc_otg_enable_global_interrupts(core_if);
+               cil_pcd_start(core_if);
+
+               if (otg_cap_param == DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE ||
+                       otg_cap_param == DWC_OTG_CAP_PARAM_SRP_ONLY_CAPABLE) {
+                       /*
+                        * Initiate SRP after initial ADP probe.
+                        */
+                       dwc_otg_initiate_srp(core_if);
+               }
+       }
+
+       return 1;
+}
+/**
+ * This interrupt indicates that the Wakeup Logic has detected a
+ * status change either on IDDIG or BSessVld.
+ */
+static uint32_t dwc_otg_handle_pwrdn_stschng_intr(dwc_otg_device_t *otg_dev)
+{
+       int retval;
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+       gpwrdn_data_t gpwrdn_temp = {.d32 = 0 };
+       dwc_otg_core_if_t *core_if = otg_dev->core_if;
+
+       DWC_PRINTF("%s called\n", __FUNCTION__);
+
+       if (core_if->power_down == 2) {
+               if (core_if->hibernation_suspend <= 0) {
+                       DWC_PRINTF("Already exited from Hibernation\n");
+                       return 1;
+               } else
+                       gpwrdn_temp.d32 = core_if->gr_backup->gpwrdn_local;
+
+       } else {
+               gpwrdn_temp.d32 = core_if->adp.gpwrdn;
+       }
+
+       gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+
+       if (gpwrdn.b.idsts ^ gpwrdn_temp.b.idsts) {
+               retval = dwc_otg_handle_pwrdn_idsts_change(otg_dev);
+       } else if (gpwrdn.b.bsessvld ^ gpwrdn_temp.b.bsessvld) {
+               retval = dwc_otg_handle_pwrdn_session_change(core_if);
+       }
+
+       return retval;
+}
+
+/**
+ * This interrupt indicates that the Wakeup Logic has detected a
+ * SRP.
+ */
+static int32_t dwc_otg_handle_pwrdn_srp_intr(dwc_otg_core_if_t * core_if)
+{
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+
+       DWC_PRINTF("%s called\n", __FUNCTION__);
+
+       if (!core_if->hibernation_suspend) {
+               DWC_PRINTF("Already exited from Hibernation\n");
+               return 1;
+       }
+#ifdef DWC_DEV_SRPCAP
+       if (core_if->pwron_timer_started) {
+               core_if->pwron_timer_started = 0;
+               DWC_TIMER_CANCEL(core_if->pwron_timer);
+       }
+#endif
+
+       /* Switch on the voltage to the core */
+       gpwrdn.b.pwrdnswtch = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Reset the core */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Disable power clamps */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnclmp = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       /* Remove reset the core signal */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+       dwc_udelay(10);
+
+       /* Disable PMU interrupt */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuintsel = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       /* Indicates that we are exiting from hibernation */
+       core_if->hibernation_suspend = 0;
+
+       /* Disable PMU */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuactv = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Programm Disable VBUS to 0 */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.dis_vbus = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       /*Initialize the core as Host */
+       core_if->op_state = A_HOST;
+       dwc_otg_core_init(core_if);
+       dwc_otg_enable_global_interrupts(core_if);
+       cil_hcd_start(core_if);
+
+       return 1;
+}
+
+/** This interrupt indicates that restore command after Hibernation
+ * was completed by the core. */
+int32_t dwc_otg_handle_restore_done_intr(dwc_otg_core_if_t * core_if)
+{
+       pcgcctl_data_t pcgcctl;
+       DWC_DEBUGPL(DBG_ANY, "++Restore Done Interrupt++\n");
+
+       //TODO De-assert restore signal. 8.a
+       pcgcctl.d32 = DWC_READ_REG32(core_if->pcgcctl);
+       if (pcgcctl.b.restoremode == 1) {
+               gintmsk_data_t gintmsk = {.d32 = 0 };
+               /*
+                * If restore mode is Remote Wakeup,
+                * unmask Remote Wakeup interrupt.
+                */
+               gintmsk.b.wkupintr = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk,
+                                0, gintmsk.d32);
+       }
+
+       return 1;
+}
+
+/**
+ * This interrupt indicates that a device has been disconnected from
+ * the root port.
+ */
+int32_t dwc_otg_handle_disconnect_intr(dwc_otg_core_if_t * core_if)
+{
+       gintsts_data_t gintsts;
+
+       DWC_DEBUGPL(DBG_ANY, "++Disconnect Detected Interrupt++ (%s) %s\n",
+                   (dwc_otg_is_host_mode(core_if) ? "Host" : "Device"),
+                   op_state_str(core_if));
+
+/** @todo Consolidate this if statement. */
+#ifndef DWC_HOST_ONLY
+       if (core_if->op_state == B_HOST) {
+               /* If in device mode Disconnect and stop the HCD, then
+                * start the PCD. */
+               DWC_SPINUNLOCK(core_if->lock);
+               cil_hcd_disconnect(core_if);
+               cil_pcd_start(core_if);
+               DWC_SPINLOCK(core_if->lock);
+               core_if->op_state = B_PERIPHERAL;
+       } else if (dwc_otg_is_device_mode(core_if)) {
+               gotgctl_data_t gotgctl = {.d32 = 0 };
+               gotgctl.d32 =
+                   DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
+               if (gotgctl.b.hstsethnpen == 1) {
+                       /* Do nothing, if HNP in process the OTG
+                        * interrupt "Host Negotiation Detected"
+                        * interrupt will do the mode switch.
+                        */
+               } else if (gotgctl.b.devhnpen == 0) {
+                       /* If in device mode Disconnect and stop the HCD, then
+                        * start the PCD. */
+                       DWC_SPINUNLOCK(core_if->lock);
+                       cil_hcd_disconnect(core_if);
+                       cil_pcd_start(core_if);
+                       DWC_SPINLOCK(core_if->lock);
+                       core_if->op_state = B_PERIPHERAL;
+               } else {
+                       DWC_DEBUGPL(DBG_ANY, "!a_peripheral && !devhnpen\n");
+               }
+       } else {
+               if (core_if->op_state == A_HOST) {
+                       /* A-Cable still connected but device disconnected. */
+                       DWC_SPINUNLOCK(core_if->lock);
+                       cil_hcd_disconnect(core_if);
+                       DWC_SPINLOCK(core_if->lock);
+                       if (core_if->adp_enable) {
+                               gpwrdn_data_t gpwrdn = { .d32 = 0 };
+                               cil_hcd_stop(core_if);
+                               /* Enable Power Down Logic */
+                               gpwrdn.b.pmuintsel = 1;
+                               gpwrdn.b.pmuactv = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                               dwc_otg_adp_probe_start(core_if);
+
+                               /* Power off the core */
+                               if (core_if->power_down == 2) {
+                                       gpwrdn.d32 = 0;
+                                       gpwrdn.b.pwrdnswtch = 1;
+                                       DWC_MODIFY_REG32
+                                           (&core_if->core_global_regs->gpwrdn,
+                                            gpwrdn.d32, 0);
+                               }
+                       }
+               }
+       }
+#endif
+       /* Change to L3(OFF) state */
+       core_if->lx_state = DWC_OTG_L3;
+
+       gintsts.d32 = 0;
+       gintsts.b.disconnect = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+       return 1;
+}
+
+/**
+ * This interrupt indicates that SUSPEND state has been detected on
+ * the USB.
+ *
+ * For HNP the USB Suspend interrupt signals the change from
+ * "a_peripheral" to "a_host".
+ *
+ * When power management is enabled the core will be put in low power
+ * mode.
+ */
+int32_t dwc_otg_handle_usb_suspend_intr(dwc_otg_core_if_t * core_if)
+{
+       dsts_data_t dsts;
+       gintsts_data_t gintsts;
+       dcfg_data_t dcfg;
+
+       DWC_DEBUGPL(DBG_ANY, "USB SUSPEND\n");
+
+       if (dwc_otg_is_device_mode(core_if)) {
+               /* Check the Device status register to determine if the Suspend
+                * state is active. */
+               dsts.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
+               DWC_DEBUGPL(DBG_PCD, "DSTS=0x%0x\n", dsts.d32);
+               DWC_DEBUGPL(DBG_PCD, "DSTS.Suspend Status=%d "
+                           "HWCFG4.power Optimize=%d\n",
+                           dsts.b.suspsts, core_if->hwcfg4.b.power_optimiz);
+
+#ifdef PARTIAL_POWER_DOWN
+/** @todo Add a module parameter for power management. */
+
+               if (dsts.b.suspsts && core_if->hwcfg4.b.power_optimiz) {
+                       pcgcctl_data_t power = {.d32 = 0 };
+                       DWC_DEBUGPL(DBG_CIL, "suspend\n");
+
+                       power.b.pwrclmp = 1;
+                       DWC_WRITE_REG32(core_if->pcgcctl, power.d32);
+
+                       power.b.rstpdwnmodule = 1;
+                       DWC_MODIFY_REG32(core_if->pcgcctl, 0, power.d32);
+
+                       power.b.stoppclk = 1;
+                       DWC_MODIFY_REG32(core_if->pcgcctl, 0, power.d32);
+
+               } else {
+                       DWC_DEBUGPL(DBG_ANY, "disconnect?\n");
+               }
+#endif
+               /* PCD callback for suspend. Release the lock inside of callback function */
+               cil_pcd_suspend(core_if);
+               if (core_if->power_down == 2)
+               {
+                       dcfg.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg);
+                       DWC_DEBUGPL(DBG_ANY,"lx_state = %08x\n",core_if->lx_state);
+                       DWC_DEBUGPL(DBG_ANY," device address = %08d\n",dcfg.b.devaddr);
+
+                       if (core_if->lx_state != DWC_OTG_L3 && dcfg.b.devaddr) {
+                               pcgcctl_data_t pcgcctl = {.d32 = 0 };
+                               gpwrdn_data_t gpwrdn = {.d32 = 0 };
+                               gusbcfg_data_t gusbcfg = {.d32 = 0 };
+
+                               /* Change to L2(suspend) state */
+                               core_if->lx_state = DWC_OTG_L2;
+
+                               /* Clear interrupt in gintsts */
+                               gintsts.d32 = 0;
+                               gintsts.b.usbsuspend = 1;
+                               DWC_WRITE_REG32(&core_if->core_global_regs->
+                                               gintsts, gintsts.d32);
+                               DWC_PRINTF("Start of hibernation completed\n");
+                               dwc_otg_save_global_regs(core_if);
+                               dwc_otg_save_dev_regs(core_if);
+
+                               gusbcfg.d32 =
+                                   DWC_READ_REG32(&core_if->core_global_regs->
+                                                  gusbcfg);
+                               if (gusbcfg.b.ulpi_utmi_sel == 1) {
+                                       /* ULPI interface */
+                                       /* Suspend the Phy Clock */
+                                       pcgcctl.d32 = 0;
+                                       pcgcctl.b.stoppclk = 1;
+                                       DWC_MODIFY_REG32(core_if->pcgcctl, 0,
+                                                        pcgcctl.d32);
+                                       dwc_udelay(10);
+                                       gpwrdn.b.pmuactv = 1;
+                                       DWC_MODIFY_REG32(&core_if->
+                                                        core_global_regs->
+                                                        gpwrdn, 0, gpwrdn.d32);
+                               } else {
+                                       /* UTMI+ Interface */
+                                       gpwrdn.b.pmuactv = 1;
+                                       DWC_MODIFY_REG32(&core_if->
+                                                        core_global_regs->
+                                                        gpwrdn, 0, gpwrdn.d32);
+                                       dwc_udelay(10);
+                                       pcgcctl.b.stoppclk = 1;
+                                       DWC_MODIFY_REG32(core_if->pcgcctl, 0,
+                                                        pcgcctl.d32);
+                                       dwc_udelay(10);
+                               }
+
+                               /* Set flag to indicate that we are in hibernation */
+                               core_if->hibernation_suspend = 1;
+                               /* Enable interrupts from wake up logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pmuintsel = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                               dwc_udelay(10);
+
+                               /* Unmask device mode interrupts in GPWRDN */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.rst_det_msk = 1;
+                               gpwrdn.b.lnstchng_msk = 1;
+                               gpwrdn.b.sts_chngint_msk = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                               dwc_udelay(10);
+
+                               /* Enable Power Down Clamp */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pwrdnclmp = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                               dwc_udelay(10);
+
+                               /* Switch off VDD */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pwrdnswtch = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+
+                               /* Save gpwrdn register for further usage if stschng interrupt */
+                               core_if->gr_backup->gpwrdn_local =
+                                                       DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+                               DWC_PRINTF("Hibernation completed\n");
+
+                               return 1;
+                       }
+               } else if (core_if->power_down == 3) {
+                       pcgcctl_data_t pcgcctl = {.d32 = 0 };
+                       dcfg.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg);
+                       DWC_DEBUGPL(DBG_ANY, "lx_state = %08x\n",core_if->lx_state);
+                       DWC_DEBUGPL(DBG_ANY, " device address = %08d\n",dcfg.b.devaddr);
+
+                       if (core_if->lx_state != DWC_OTG_L3 && dcfg.b.devaddr) {
+                               DWC_DEBUGPL(DBG_ANY, "Start entering to extended hibernation\n");
+                               core_if->xhib = 1;
+
+                               /* Clear interrupt in gintsts */
+                               gintsts.d32 = 0;
+                               gintsts.b.usbsuspend = 1;
+                               DWC_WRITE_REG32(&core_if->core_global_regs->
+                                       gintsts, gintsts.d32);
+
+                               dwc_otg_save_global_regs(core_if);
+                               dwc_otg_save_dev_regs(core_if);
+
+                               /* Wait for 10 PHY clocks */
+                               dwc_udelay(10);
+
+                               /* Program GPIO register while entering to xHib */
+                               DWC_WRITE_REG32(&core_if->core_global_regs->ggpio, 0x1);
+
+                               pcgcctl.b.enbl_extnd_hiber = 1;
+                               DWC_MODIFY_REG32(core_if->pcgcctl, 0, pcgcctl.d32);
+                               DWC_MODIFY_REG32(core_if->pcgcctl, 0, pcgcctl.d32);
+
+                               pcgcctl.d32 = 0;
+                               pcgcctl.b.extnd_hiber_pwrclmp = 1;
+                               DWC_MODIFY_REG32(core_if->pcgcctl, 0, pcgcctl.d32);
+
+                               pcgcctl.d32 = 0;
+                               pcgcctl.b.extnd_hiber_switch = 1;
+                               core_if->gr_backup->xhib_gpwrdn = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+                               core_if->gr_backup->xhib_pcgcctl = DWC_READ_REG32(core_if->pcgcctl) | pcgcctl.d32;
+                               DWC_MODIFY_REG32(core_if->pcgcctl, 0, pcgcctl.d32);
+
+                               DWC_DEBUGPL(DBG_ANY, "Finished entering to extended hibernation\n");
+
+                               return 1;
+                       }
+               }
+       } else {
+               if (core_if->op_state == A_PERIPHERAL) {
+                       DWC_DEBUGPL(DBG_ANY, "a_peripheral->a_host\n");
+                       /* Clear the a_peripheral flag, back to a_host. */
+                       DWC_SPINUNLOCK(core_if->lock);
+                       cil_pcd_stop(core_if);
+                       cil_hcd_start(core_if);
+                       DWC_SPINLOCK(core_if->lock);
+                       core_if->op_state = A_HOST;
+               }
+       }
+
+       /* Change to L2(suspend) state */
+       core_if->lx_state = DWC_OTG_L2;
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.usbsuspend = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+       return 1;
+}
+
+static int32_t dwc_otg_handle_xhib_exit_intr(dwc_otg_core_if_t * core_if)
+{
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+       pcgcctl_data_t pcgcctl = {.d32 = 0 };
+       gahbcfg_data_t gahbcfg = {.d32 = 0 };
+
+       dwc_udelay(10);
+
+       /* Program GPIO register while entering to xHib */
+       DWC_WRITE_REG32(&core_if->core_global_regs->ggpio, 0x0);
+
+       pcgcctl.d32 = core_if->gr_backup->xhib_pcgcctl;
+       pcgcctl.b.extnd_hiber_pwrclmp = 0;
+       DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
+       dwc_udelay(10);
+
+       gpwrdn.d32 = core_if->gr_backup->xhib_gpwrdn;
+       gpwrdn.b.restore = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32);
+       dwc_udelay(10);
+
+       restore_lpm_i2c_regs(core_if);
+
+       pcgcctl.d32 = core_if->gr_backup->pcgcctl_local & (0x3FFFF << 14);
+       pcgcctl.b.max_xcvrselect = 1;
+       pcgcctl.b.ess_reg_restored = 0;
+       pcgcctl.b.extnd_hiber_switch = 0;
+       pcgcctl.b.extnd_hiber_pwrclmp = 0;
+       pcgcctl.b.enbl_extnd_hiber = 1;
+       DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
+
+       gahbcfg.d32 = core_if->gr_backup->gahbcfg_local;
+       gahbcfg.b.glblintrmsk = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gahbcfg, gahbcfg.d32);
+
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, 0xFFFFFFFF);
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, 0x1 << 16);
+
+       DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg,
+                       core_if->gr_backup->gusbcfg_local);
+       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dcfg,
+                       core_if->dr_backup->dcfg);
+
+       pcgcctl.d32 = 0;
+       pcgcctl.d32 = core_if->gr_backup->pcgcctl_local & (0x3FFFF << 14);
+       pcgcctl.b.max_xcvrselect = 1;
+       pcgcctl.d32 |= 0x608;
+       DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
+       dwc_udelay(10);
+
+       pcgcctl.d32 = 0;
+       pcgcctl.d32 = core_if->gr_backup->pcgcctl_local & (0x3FFFF << 14);
+       pcgcctl.b.max_xcvrselect = 1;
+       pcgcctl.b.ess_reg_restored = 1;
+       pcgcctl.b.enbl_extnd_hiber = 1;
+       pcgcctl.b.rstpdwnmodule = 1;
+       pcgcctl.b.restoremode = 1;
+       DWC_WRITE_REG32(core_if->pcgcctl, pcgcctl.d32);
+
+       DWC_DEBUGPL(DBG_ANY, "%s called\n", __FUNCTION__);
+
+       return 1;
+}
+
+#ifdef CONFIG_USB_DWC_OTG_LPM
+/**
+ * This function hadles LPM transaction received interrupt.
+ */
+static int32_t dwc_otg_handle_lpm_intr(dwc_otg_core_if_t * core_if)
+{
+       glpmcfg_data_t lpmcfg;
+       gintsts_data_t gintsts;
+
+       if (!core_if->core_params->lpm_enable) {
+               DWC_PRINTF("Unexpected LPM interrupt\n");
+       }
+
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       DWC_PRINTF("LPM config register = 0x%08x\n", lpmcfg.d32);
+
+       if (dwc_otg_is_host_mode(core_if)) {
+               cil_hcd_sleep(core_if);
+       } else {
+               lpmcfg.b.hird_thres |= (1 << 4);
+               DWC_WRITE_REG32(&core_if->core_global_regs->glpmcfg,
+                               lpmcfg.d32);
+       }
+
+       /* Examine prt_sleep_sts after TL1TokenTetry period max (10 us) */
+       dwc_udelay(10);
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       if (lpmcfg.b.prt_sleep_sts) {
+               /* Save the current state */
+               core_if->lx_state = DWC_OTG_L1;
+       }
+
+       /* Clear interrupt  */
+       gintsts.d32 = 0;
+       gintsts.b.lpmtranrcvd = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+       return 1;
+}
+#endif /* CONFIG_USB_DWC_OTG_LPM */
+
+/**
+ * This function returns the Core Interrupt register.
+ */
+static inline uint32_t dwc_otg_read_common_intr(dwc_otg_core_if_t * core_if, gintmsk_data_t *reenable_gintmsk, dwc_otg_hcd_t *hcd)
+{
+       gahbcfg_data_t gahbcfg = {.d32 = 0 };
+       gintsts_data_t gintsts;
+       gintmsk_data_t gintmsk;
+       gintmsk_data_t gintmsk_common = {.d32 = 0 };
+       gintmsk_common.b.wkupintr = 1;
+       gintmsk_common.b.sessreqintr = 1;
+       gintmsk_common.b.conidstschng = 1;
+       gintmsk_common.b.otgintr = 1;
+       gintmsk_common.b.modemismatch = 1;
+       gintmsk_common.b.disconnect = 1;
+       gintmsk_common.b.usbsuspend = 1;
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       gintmsk_common.b.lpmtranrcvd = 1;
+#endif
+       gintmsk_common.b.restoredone = 1;
+       if(dwc_otg_is_device_mode(core_if))
+       {
+               /** @todo: The port interrupt occurs while in device
+                * mode. Added code to CIL to clear the interrupt for now!
+                */
+               gintmsk_common.b.portintr = 1;
+       }
+       if(fiq_enable) {
+               local_fiq_disable();
+               fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+               gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+               gintmsk.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk);
+               /* Pull in the interrupts that the FIQ has masked */
+               gintmsk.d32 |= ~(hcd->fiq_state->gintmsk_saved.d32);
+               gintmsk.d32 |= gintmsk_common.d32;
+               /* for the upstairs function to reenable - have to read it here in case FIQ triggers again */
+               reenable_gintmsk->d32 = gintmsk.d32;
+               fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+               local_fiq_enable();
+       } else {
+               gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+               gintmsk.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk);
+       }
+
+       gahbcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->gahbcfg);
+
+#ifdef DEBUG
+       /* if any common interrupts set */
+       if (gintsts.d32 & gintmsk_common.d32) {
+               DWC_DEBUGPL(DBG_ANY, "common_intr: gintsts=%08x  gintmsk=%08x\n",
+                           gintsts.d32, gintmsk.d32);
+       }
+#endif
+       if (!fiq_enable){
+               if (gahbcfg.b.glblintrmsk)
+                       return ((gintsts.d32 & gintmsk.d32) & gintmsk_common.d32);
+               else
+                       return 0;
+       } else {
+               /* Our IRQ kicker is no longer the USB hardware, it's the MPHI interface.
+                * Can't trust the global interrupt mask bit in this case.
+                */
+               return ((gintsts.d32 & gintmsk.d32) & gintmsk_common.d32);
+       }
+
+}
+
+/* MACRO for clearing interupt bits in GPWRDN register */
+#define CLEAR_GPWRDN_INTR(__core_if,__intr) \
+do { \
+               gpwrdn_data_t gpwrdn = {.d32=0}; \
+               gpwrdn.b.__intr = 1; \
+               DWC_MODIFY_REG32(&__core_if->core_global_regs->gpwrdn, \
+               0, gpwrdn.d32); \
+} while (0)
+
+/**
+ * Common interrupt handler.
+ *
+ * The common interrupts are those that occur in both Host and Device mode.
+ * This handler handles the following interrupts:
+ * - Mode Mismatch Interrupt
+ * - Disconnect Interrupt
+ * - OTG Interrupt
+ * - Connector ID Status Change Interrupt
+ * - Session Request Interrupt.
+ * - Resume / Remote Wakeup Detected Interrupt.
+ * - LPM Transaction Received Interrupt
+ * - ADP Transaction Received Interrupt
+ *
+ */
+int32_t dwc_otg_handle_common_intr(void *dev)
+{
+       int retval = 0;
+       gintsts_data_t gintsts;
+       gintmsk_data_t gintmsk_reenable = { .d32 = 0 };
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+       dwc_otg_device_t *otg_dev = dev;
+       dwc_otg_core_if_t *core_if = otg_dev->core_if;
+       gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+       if (dwc_otg_is_device_mode(core_if))
+               core_if->frame_num = dwc_otg_get_frame_number(core_if);
+
+       if (core_if->lock)
+               DWC_SPINLOCK(core_if->lock);
+
+       if (core_if->power_down == 3 && core_if->xhib == 1) {
+               DWC_DEBUGPL(DBG_ANY, "Exiting from xHIB state\n");
+               retval |= dwc_otg_handle_xhib_exit_intr(core_if);
+               core_if->xhib = 2;
+               if (core_if->lock)
+                       DWC_SPINUNLOCK(core_if->lock);
+
+               return retval;
+       }
+
+       if (core_if->hibernation_suspend <= 0) {
+               /* read_common will have to poke the FIQ's saved mask. We must then clear this mask at the end
+                * of this handler - god only knows why it's done like this
+                */
+               gintsts.d32 = dwc_otg_read_common_intr(core_if, &gintmsk_reenable, otg_dev->hcd);
+
+               if (gintsts.b.modemismatch) {
+                       retval |= dwc_otg_handle_mode_mismatch_intr(core_if);
+               }
+               if (gintsts.b.otgintr) {
+                       retval |= dwc_otg_handle_otg_intr(core_if);
+               }
+               if (gintsts.b.conidstschng) {
+                       retval |=
+                           dwc_otg_handle_conn_id_status_change_intr(core_if);
+               }
+               if (gintsts.b.disconnect) {
+                       retval |= dwc_otg_handle_disconnect_intr(core_if);
+               }
+               if (gintsts.b.sessreqintr) {
+                       retval |= dwc_otg_handle_session_req_intr(core_if);
+               }
+               if (gintsts.b.wkupintr) {
+                       retval |= dwc_otg_handle_wakeup_detected_intr(core_if);
+               }
+               if (gintsts.b.usbsuspend) {
+                       retval |= dwc_otg_handle_usb_suspend_intr(core_if);
+               }
+#ifdef CONFIG_USB_DWC_OTG_LPM
+               if (gintsts.b.lpmtranrcvd) {
+                       retval |= dwc_otg_handle_lpm_intr(core_if);
+               }
+#endif
+               if (gintsts.b.restoredone) {
+                       gintsts.d32 = 0;
+                       if (core_if->power_down == 2)
+                               core_if->hibernation_suspend = -1;
+                       else if (core_if->power_down == 3 && core_if->xhib == 2) {
+                               gpwrdn_data_t gpwrdn = {.d32 = 0 };
+                               pcgcctl_data_t pcgcctl = {.d32 = 0 };
+                               dctl_data_t dctl = {.d32 = 0 };
+
+                               DWC_WRITE_REG32(&core_if->core_global_regs->
+                                               gintsts, 0xFFFFFFFF);
+
+                               DWC_DEBUGPL(DBG_ANY,
+                                           "RESTORE DONE generated\n");
+
+                               gpwrdn.b.restore = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+                               dwc_udelay(10);
+
+                               pcgcctl.b.rstpdwnmodule = 1;
+                               DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32, 0);
+
+                               DWC_WRITE_REG32(&core_if->core_global_regs->gusbcfg, core_if->gr_backup->gusbcfg_local);
+                               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dcfg, core_if->dr_backup->dcfg);
+                               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dctl, core_if->dr_backup->dctl);
+                               dwc_udelay(50);
+
+                               dctl.b.pwronprgdone = 1;
+                               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, 0, dctl.d32);
+                               dwc_udelay(10);
+
+                               dwc_otg_restore_global_regs(core_if);
+                               dwc_otg_restore_dev_regs(core_if, 0);
+
+                               dctl.d32 = 0;
+                               dctl.b.pwronprgdone = 1;
+                               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, dctl.d32, 0);
+                               dwc_udelay(10);
+
+                               pcgcctl.d32 = 0;
+                               pcgcctl.b.enbl_extnd_hiber = 1;
+                               DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32, 0);
+
+                               /* The core will be in ON STATE */
+                               core_if->lx_state = DWC_OTG_L0;
+                               core_if->xhib = 0;
+
+                               DWC_SPINUNLOCK(core_if->lock);
+                               if (core_if->pcd_cb && core_if->pcd_cb->resume_wakeup) {
+                                       core_if->pcd_cb->resume_wakeup(core_if->pcd_cb->p);
+                               }
+                               DWC_SPINLOCK(core_if->lock);
+
+                       }
+
+                       gintsts.b.restoredone = 1;
+                       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts,gintsts.d32);
+                       DWC_PRINTF(" --Restore done interrupt received-- \n");
+                       retval |= 1;
+               }
+               if (gintsts.b.portintr && dwc_otg_is_device_mode(core_if)) {
+                       /* The port interrupt occurs while in device mode with HPRT0
+                        * Port Enable/Disable.
+                        */
+                       gintsts.d32 = 0;
+                       gintsts.b.portintr = 1;
+                       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts,gintsts.d32);
+                       retval |= 1;
+                       gintmsk_reenable.b.portintr = 1;
+
+               }
+               /* Did we actually handle anything? if so, unmask the interrupt */
+//             fiq_print(FIQDBG_INT, otg_dev->hcd->fiq_state, "CILOUT %1d", retval);
+//             fiq_print(FIQDBG_INT, otg_dev->hcd->fiq_state, "%08x", gintsts.d32);
+//             fiq_print(FIQDBG_INT, otg_dev->hcd->fiq_state, "%08x", gintmsk_reenable.d32);
+               if (retval && fiq_enable) {
+                       DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, gintmsk_reenable.d32);
+               }
+
+       } else {
+               DWC_DEBUGPL(DBG_ANY, "gpwrdn=%08x\n", gpwrdn.d32);
+
+               if (gpwrdn.b.disconn_det && gpwrdn.b.disconn_det_msk) {
+                       CLEAR_GPWRDN_INTR(core_if, disconn_det);
+                       if (gpwrdn.b.linestate == 0) {
+                               dwc_otg_handle_pwrdn_disconnect_intr(core_if);
+                       } else {
+                               DWC_PRINTF("Disconnect detected while linestate is not 0\n");
+                       }
+
+                       retval |= 1;
+               }
+               if (gpwrdn.b.lnstschng && gpwrdn.b.lnstchng_msk) {
+                       CLEAR_GPWRDN_INTR(core_if, lnstschng);
+                       /* remote wakeup from hibernation */
+                       if (gpwrdn.b.linestate == 2 || gpwrdn.b.linestate == 1) {
+                               dwc_otg_handle_pwrdn_wakeup_detected_intr(core_if);
+                       } else {
+                               DWC_PRINTF("gpwrdn.linestate = %d\n", gpwrdn.b.linestate);
+                       }
+                       retval |= 1;
+               }
+               if (gpwrdn.b.rst_det && gpwrdn.b.rst_det_msk) {
+                       CLEAR_GPWRDN_INTR(core_if, rst_det);
+                       if (gpwrdn.b.linestate == 0) {
+                               DWC_PRINTF("Reset detected\n");
+                               retval |= dwc_otg_device_hibernation_restore(core_if, 0, 1);
+                       }
+               }
+               if (gpwrdn.b.srp_det && gpwrdn.b.srp_det_msk) {
+                       CLEAR_GPWRDN_INTR(core_if, srp_det);
+                       dwc_otg_handle_pwrdn_srp_intr(core_if);
+                       retval |= 1;
+               }
+       }
+       /* Handle ADP interrupt here */
+       if (gpwrdn.b.adp_int) {
+               DWC_PRINTF("ADP interrupt\n");
+               CLEAR_GPWRDN_INTR(core_if, adp_int);
+               dwc_otg_adp_handle_intr(core_if);
+               retval |= 1;
+       }
+       if (gpwrdn.b.sts_chngint && gpwrdn.b.sts_chngint_msk) {
+               DWC_PRINTF("STS CHNG interrupt asserted\n");
+               CLEAR_GPWRDN_INTR(core_if, sts_chngint);
+               dwc_otg_handle_pwrdn_stschng_intr(otg_dev);
+
+               retval |= 1;
+       }
+       if (core_if->lock)
+               DWC_SPINUNLOCK(core_if->lock);
+       return retval;
+}
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_core_if.h
@@ -0,0 +1,705 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_core_if.h $
+ * $Revision: #13 $
+ * $Date: 2012/08/10 $
+ * $Change: 2047372 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#if !defined(__DWC_CORE_IF_H__)
+#define __DWC_CORE_IF_H__
+
+#include "dwc_os.h"
+
+/** @file
+ * This file defines DWC_OTG Core API
+ */
+
+struct dwc_otg_core_if;
+typedef struct dwc_otg_core_if dwc_otg_core_if_t;
+
+/** Maximum number of Periodic FIFOs */
+#define MAX_PERIO_FIFOS 15
+/** Maximum number of Periodic FIFOs */
+#define MAX_TX_FIFOS 15
+
+/** Maximum number of Endpoints/HostChannels */
+#define MAX_EPS_CHANNELS 16
+
+extern dwc_otg_core_if_t *dwc_otg_cil_init(const uint32_t * _reg_base_addr);
+extern void dwc_otg_core_init(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_cil_remove(dwc_otg_core_if_t * _core_if);
+
+extern void dwc_otg_enable_global_interrupts(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_disable_global_interrupts(dwc_otg_core_if_t * _core_if);
+
+extern uint8_t dwc_otg_is_device_mode(dwc_otg_core_if_t * _core_if);
+extern uint8_t dwc_otg_is_host_mode(dwc_otg_core_if_t * _core_if);
+
+extern uint8_t dwc_otg_is_dma_enable(dwc_otg_core_if_t * core_if);
+
+/** This function should be called on every hardware interrupt. */
+extern int32_t dwc_otg_handle_common_intr(void *otg_dev);
+
+/** @name OTG Core Parameters */
+/** @{ */
+
+/**
+ * Specifies the OTG capabilities. The driver will automatically
+ * detect the value for this parameter if none is specified.
+ * 0 - HNP and SRP capable (default)
+ * 1 - SRP Only capable
+ * 2 - No HNP/SRP capable
+ */
+extern int dwc_otg_set_param_otg_cap(dwc_otg_core_if_t * core_if, int32_t val);
+extern int32_t dwc_otg_get_param_otg_cap(dwc_otg_core_if_t * core_if);
+#define DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE 0
+#define DWC_OTG_CAP_PARAM_SRP_ONLY_CAPABLE 1
+#define DWC_OTG_CAP_PARAM_NO_HNP_SRP_CAPABLE 2
+#define dwc_param_otg_cap_default DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE
+
+extern int dwc_otg_set_param_opt(dwc_otg_core_if_t * core_if, int32_t val);
+extern int32_t dwc_otg_get_param_opt(dwc_otg_core_if_t * core_if);
+#define dwc_param_opt_default 1
+
+/**
+ * Specifies whether to use slave or DMA mode for accessing the data
+ * FIFOs. The driver will automatically detect the value for this
+ * parameter if none is specified.
+ * 0 - Slave
+ * 1 - DMA (default, if available)
+ */
+extern int dwc_otg_set_param_dma_enable(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_dma_enable(dwc_otg_core_if_t * core_if);
+#define dwc_param_dma_enable_default 1
+
+/**
+ * When DMA mode is enabled specifies whether to use
+ * address DMA or DMA Descritor mode for accessing the data
+ * FIFOs in device mode. The driver will automatically detect
+ * the value for this parameter if none is specified.
+ * 0 - address DMA
+ * 1 - DMA Descriptor(default, if available)
+ */
+extern int dwc_otg_set_param_dma_desc_enable(dwc_otg_core_if_t * core_if,
+                                            int32_t val);
+extern int32_t dwc_otg_get_param_dma_desc_enable(dwc_otg_core_if_t * core_if);
+//#define dwc_param_dma_desc_enable_default 1
+#define dwc_param_dma_desc_enable_default 0 // Broadcom BCM2708
+
+/** The DMA Burst size (applicable only for External DMA
+ * Mode). 1, 4, 8 16, 32, 64, 128, 256 (default 32)
+ */
+extern int dwc_otg_set_param_dma_burst_size(dwc_otg_core_if_t * core_if,
+                                           int32_t val);
+extern int32_t dwc_otg_get_param_dma_burst_size(dwc_otg_core_if_t * core_if);
+#define dwc_param_dma_burst_size_default 32
+
+/**
+ * Specifies the maximum speed of operation in host and device mode.
+ * The actual speed depends on the speed of the attached device and
+ * the value of phy_type. The actual speed depends on the speed of the
+ * attached device.
+ * 0 - High Speed (default)
+ * 1 - Full Speed
+ */
+extern int dwc_otg_set_param_speed(dwc_otg_core_if_t * core_if, int32_t val);
+extern int32_t dwc_otg_get_param_speed(dwc_otg_core_if_t * core_if);
+#define dwc_param_speed_default 0
+#define DWC_SPEED_PARAM_HIGH 0
+#define DWC_SPEED_PARAM_FULL 1
+
+/** Specifies whether low power mode is supported when attached
+ *     to a Full Speed or Low Speed device in host mode.
+ * 0 - Don't support low power mode (default)
+ * 1 - Support low power mode
+ */
+extern int dwc_otg_set_param_host_support_fs_ls_low_power(dwc_otg_core_if_t *
+                                                         core_if, int32_t val);
+extern int32_t dwc_otg_get_param_host_support_fs_ls_low_power(dwc_otg_core_if_t
+                                                             * core_if);
+#define dwc_param_host_support_fs_ls_low_power_default 0
+
+/** Specifies the PHY clock rate in low power mode when connected to a
+ * Low Speed device in host mode. This parameter is applicable only if
+ * HOST_SUPPORT_FS_LS_LOW_POWER is enabled. If PHY_TYPE is set to FS
+ * then defaults to 6 MHZ otherwise 48 MHZ.
+ *
+ * 0 - 48 MHz
+ * 1 - 6 MHz
+ */
+extern int dwc_otg_set_param_host_ls_low_power_phy_clk(dwc_otg_core_if_t *
+                                                      core_if, int32_t val);
+extern int32_t dwc_otg_get_param_host_ls_low_power_phy_clk(dwc_otg_core_if_t *
+                                                          core_if);
+#define dwc_param_host_ls_low_power_phy_clk_default 0
+#define DWC_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ 0
+#define DWC_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ 1
+
+/**
+ * 0 - Use cC FIFO size parameters
+ * 1 - Allow dynamic FIFO sizing (default)
+ */
+extern int dwc_otg_set_param_enable_dynamic_fifo(dwc_otg_core_if_t * core_if,
+                                                int32_t val);
+extern int32_t dwc_otg_get_param_enable_dynamic_fifo(dwc_otg_core_if_t *
+                                                    core_if);
+#define dwc_param_enable_dynamic_fifo_default 1
+
+/** Total number of 4-byte words in the data FIFO memory. This
+ * memory includes the Rx FIFO, non-periodic Tx FIFO, and periodic
+ * Tx FIFOs.
+ * 32 to 32768 (default 8192)
+ * Note: The total FIFO memory depth in the FPGA configuration is 8192.
+ */
+extern int dwc_otg_set_param_data_fifo_size(dwc_otg_core_if_t * core_if,
+                                           int32_t val);
+extern int32_t dwc_otg_get_param_data_fifo_size(dwc_otg_core_if_t * core_if);
+//#define dwc_param_data_fifo_size_default 8192
+#define dwc_param_data_fifo_size_default 0xFF0 // Broadcom BCM2708
+
+/** Number of 4-byte words in the Rx FIFO in device mode when dynamic
+ * FIFO sizing is enabled.
+ * 16 to 32768 (default 1064)
+ */
+extern int dwc_otg_set_param_dev_rx_fifo_size(dwc_otg_core_if_t * core_if,
+                                             int32_t val);
+extern int32_t dwc_otg_get_param_dev_rx_fifo_size(dwc_otg_core_if_t * core_if);
+#define dwc_param_dev_rx_fifo_size_default 1064
+
+/** Number of 4-byte words in the non-periodic Tx FIFO in device mode
+ * when dynamic FIFO sizing is enabled.
+ * 16 to 32768 (default 1024)
+ */
+extern int dwc_otg_set_param_dev_nperio_tx_fifo_size(dwc_otg_core_if_t *
+                                                    core_if, int32_t val);
+extern int32_t dwc_otg_get_param_dev_nperio_tx_fifo_size(dwc_otg_core_if_t *
+                                                        core_if);
+#define dwc_param_dev_nperio_tx_fifo_size_default 1024
+
+/** Number of 4-byte words in each of the periodic Tx FIFOs in device
+ * mode when dynamic FIFO sizing is enabled.
+ * 4 to 768 (default 256)
+ */
+extern int dwc_otg_set_param_dev_perio_tx_fifo_size(dwc_otg_core_if_t * core_if,
+                                                   int32_t val, int fifo_num);
+extern int32_t dwc_otg_get_param_dev_perio_tx_fifo_size(dwc_otg_core_if_t *
+                                                       core_if, int fifo_num);
+#define dwc_param_dev_perio_tx_fifo_size_default 256
+
+/** Number of 4-byte words in the Rx FIFO in host mode when dynamic
+ * FIFO sizing is enabled.
+ * 16 to 32768 (default 1024)
+ */
+extern int dwc_otg_set_param_host_rx_fifo_size(dwc_otg_core_if_t * core_if,
+                                              int32_t val);
+extern int32_t dwc_otg_get_param_host_rx_fifo_size(dwc_otg_core_if_t * core_if);
+//#define dwc_param_host_rx_fifo_size_default 1024
+#define dwc_param_host_rx_fifo_size_default 774 // Broadcom BCM2708
+
+/** Number of 4-byte words in the non-periodic Tx FIFO in host mode
+ * when Dynamic FIFO sizing is enabled in the core.
+ * 16 to 32768 (default 1024)
+ */
+extern int dwc_otg_set_param_host_nperio_tx_fifo_size(dwc_otg_core_if_t *
+                                                     core_if, int32_t val);
+extern int32_t dwc_otg_get_param_host_nperio_tx_fifo_size(dwc_otg_core_if_t *
+                                                         core_if);
+//#define dwc_param_host_nperio_tx_fifo_size_default 1024
+#define dwc_param_host_nperio_tx_fifo_size_default 0x100 // Broadcom BCM2708
+
+/** Number of 4-byte words in the host periodic Tx FIFO when dynamic
+ * FIFO sizing is enabled.
+ * 16 to 32768 (default 1024)
+ */
+extern int dwc_otg_set_param_host_perio_tx_fifo_size(dwc_otg_core_if_t *
+                                                    core_if, int32_t val);
+extern int32_t dwc_otg_get_param_host_perio_tx_fifo_size(dwc_otg_core_if_t *
+                                                        core_if);
+//#define dwc_param_host_perio_tx_fifo_size_default 1024
+#define dwc_param_host_perio_tx_fifo_size_default 0x200 // Broadcom BCM2708
+
+/** The maximum transfer size supported in bytes.
+ * 2047 to 65,535  (default 65,535)
+ */
+extern int dwc_otg_set_param_max_transfer_size(dwc_otg_core_if_t * core_if,
+                                              int32_t val);
+extern int32_t dwc_otg_get_param_max_transfer_size(dwc_otg_core_if_t * core_if);
+#define dwc_param_max_transfer_size_default 65535
+
+/** The maximum number of packets in a transfer.
+ * 15 to 511  (default 511)
+ */
+extern int dwc_otg_set_param_max_packet_count(dwc_otg_core_if_t * core_if,
+                                             int32_t val);
+extern int32_t dwc_otg_get_param_max_packet_count(dwc_otg_core_if_t * core_if);
+#define dwc_param_max_packet_count_default 511
+
+/** The number of host channel registers to use.
+ * 1 to 16 (default 12)
+ * Note: The FPGA configuration supports a maximum of 12 host channels.
+ */
+extern int dwc_otg_set_param_host_channels(dwc_otg_core_if_t * core_if,
+                                          int32_t val);
+extern int32_t dwc_otg_get_param_host_channels(dwc_otg_core_if_t * core_if);
+//#define dwc_param_host_channels_default 12
+#define dwc_param_host_channels_default 8 // Broadcom BCM2708
+
+/** The number of endpoints in addition to EP0 available for device
+ * mode operations.
+ * 1 to 15 (default 6 IN and OUT)
+ * Note: The FPGA configuration supports a maximum of 6 IN and OUT
+ * endpoints in addition to EP0.
+ */
+extern int dwc_otg_set_param_dev_endpoints(dwc_otg_core_if_t * core_if,
+                                          int32_t val);
+extern int32_t dwc_otg_get_param_dev_endpoints(dwc_otg_core_if_t * core_if);
+#define dwc_param_dev_endpoints_default 6
+
+/**
+ * Specifies the type of PHY interface to use. By default, the driver
+ * will automatically detect the phy_type.
+ *
+ * 0 - Full Speed PHY
+ * 1 - UTMI+ (default)
+ * 2 - ULPI
+ */
+extern int dwc_otg_set_param_phy_type(dwc_otg_core_if_t * core_if, int32_t val);
+extern int32_t dwc_otg_get_param_phy_type(dwc_otg_core_if_t * core_if);
+#define DWC_PHY_TYPE_PARAM_FS 0
+#define DWC_PHY_TYPE_PARAM_UTMI 1
+#define DWC_PHY_TYPE_PARAM_ULPI 2
+#define dwc_param_phy_type_default DWC_PHY_TYPE_PARAM_UTMI
+
+/**
+ * Specifies the UTMI+ Data Width. This parameter is
+ * applicable for a PHY_TYPE of UTMI+ or ULPI. (For a ULPI
+ * PHY_TYPE, this parameter indicates the data width between
+ * the MAC and the ULPI Wrapper.) Also, this parameter is
+ * applicable only if the OTG_HSPHY_WIDTH cC parameter was set
+ * to "8 and 16 bits", meaning that the core has been
+ * configured to work at either data path width.
+ *
+ * 8 or 16 bits (default 16)
+ */
+extern int dwc_otg_set_param_phy_utmi_width(dwc_otg_core_if_t * core_if,
+                                           int32_t val);
+extern int32_t dwc_otg_get_param_phy_utmi_width(dwc_otg_core_if_t * core_if);
+//#define dwc_param_phy_utmi_width_default 16
+#define dwc_param_phy_utmi_width_default 8 // Broadcom BCM2708
+
+/**
+ * Specifies whether the ULPI operates at double or single
+ * data rate. This parameter is only applicable if PHY_TYPE is
+ * ULPI.
+ *
+ * 0 - single data rate ULPI interface with 8 bit wide data
+ * bus (default)
+ * 1 - double data rate ULPI interface with 4 bit wide data
+ * bus
+ */
+extern int dwc_otg_set_param_phy_ulpi_ddr(dwc_otg_core_if_t * core_if,
+                                         int32_t val);
+extern int32_t dwc_otg_get_param_phy_ulpi_ddr(dwc_otg_core_if_t * core_if);
+#define dwc_param_phy_ulpi_ddr_default 0
+
+/**
+ * Specifies whether to use the internal or external supply to
+ * drive the vbus with a ULPI phy.
+ */
+extern int dwc_otg_set_param_phy_ulpi_ext_vbus(dwc_otg_core_if_t * core_if,
+                                              int32_t val);
+extern int32_t dwc_otg_get_param_phy_ulpi_ext_vbus(dwc_otg_core_if_t * core_if);
+#define DWC_PHY_ULPI_INTERNAL_VBUS 0
+#define DWC_PHY_ULPI_EXTERNAL_VBUS 1
+#define dwc_param_phy_ulpi_ext_vbus_default DWC_PHY_ULPI_INTERNAL_VBUS
+
+/**
+ * Specifies whether to use the I2Cinterface for full speed PHY. This
+ * parameter is only applicable if PHY_TYPE is FS.
+ * 0 - No (default)
+ * 1 - Yes
+ */
+extern int dwc_otg_set_param_i2c_enable(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_i2c_enable(dwc_otg_core_if_t * core_if);
+#define dwc_param_i2c_enable_default 0
+
+extern int dwc_otg_set_param_ulpi_fs_ls(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_ulpi_fs_ls(dwc_otg_core_if_t * core_if);
+#define dwc_param_ulpi_fs_ls_default 0
+
+extern int dwc_otg_set_param_ts_dline(dwc_otg_core_if_t * core_if, int32_t val);
+extern int32_t dwc_otg_get_param_ts_dline(dwc_otg_core_if_t * core_if);
+#define dwc_param_ts_dline_default 0
+
+/**
+ * Specifies whether dedicated transmit FIFOs are
+ * enabled for non periodic IN endpoints in device mode
+ * 0 - No
+ * 1 - Yes
+ */
+extern int dwc_otg_set_param_en_multiple_tx_fifo(dwc_otg_core_if_t * core_if,
+                                                int32_t val);
+extern int32_t dwc_otg_get_param_en_multiple_tx_fifo(dwc_otg_core_if_t *
+                                                    core_if);
+#define dwc_param_en_multiple_tx_fifo_default 1
+
+/** Number of 4-byte words in each of the Tx FIFOs in device
+ * mode when dynamic FIFO sizing is enabled.
+ * 4 to 768 (default 256)
+ */
+extern int dwc_otg_set_param_dev_tx_fifo_size(dwc_otg_core_if_t * core_if,
+                                             int fifo_num, int32_t val);
+extern int32_t dwc_otg_get_param_dev_tx_fifo_size(dwc_otg_core_if_t * core_if,
+                                                 int fifo_num);
+#define dwc_param_dev_tx_fifo_size_default 768
+
+/** Thresholding enable flag-
+ * bit 0 - enable non-ISO Tx thresholding
+ * bit 1 - enable ISO Tx thresholding
+ * bit 2 - enable Rx thresholding
+ */
+extern int dwc_otg_set_param_thr_ctl(dwc_otg_core_if_t * core_if, int32_t val);
+extern int32_t dwc_otg_get_thr_ctl(dwc_otg_core_if_t * core_if, int fifo_num);
+#define dwc_param_thr_ctl_default 0
+
+/** Thresholding length for Tx
+ * FIFOs in 32 bit DWORDs
+ */
+extern int dwc_otg_set_param_tx_thr_length(dwc_otg_core_if_t * core_if,
+                                          int32_t val);
+extern int32_t dwc_otg_get_tx_thr_length(dwc_otg_core_if_t * core_if);
+#define dwc_param_tx_thr_length_default 64
+
+/** Thresholding length for Rx
+ *     FIFOs in 32 bit DWORDs
+ */
+extern int dwc_otg_set_param_rx_thr_length(dwc_otg_core_if_t * core_if,
+                                          int32_t val);
+extern int32_t dwc_otg_get_rx_thr_length(dwc_otg_core_if_t * core_if);
+#define dwc_param_rx_thr_length_default 64
+
+/**
+ * Specifies whether LPM (Link Power Management) support is enabled
+ */
+extern int dwc_otg_set_param_lpm_enable(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_lpm_enable(dwc_otg_core_if_t * core_if);
+#define dwc_param_lpm_enable_default 1
+
+/**
+ * Specifies whether PTI enhancement is enabled
+ */
+extern int dwc_otg_set_param_pti_enable(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_pti_enable(dwc_otg_core_if_t * core_if);
+#define dwc_param_pti_enable_default 0
+
+/**
+ * Specifies whether MPI enhancement is enabled
+ */
+extern int dwc_otg_set_param_mpi_enable(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_mpi_enable(dwc_otg_core_if_t * core_if);
+#define dwc_param_mpi_enable_default 0
+
+/**
+ * Specifies whether ADP capability is enabled
+ */
+extern int dwc_otg_set_param_adp_enable(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_adp_enable(dwc_otg_core_if_t * core_if);
+#define dwc_param_adp_enable_default 0
+
+/**
+ * Specifies whether IC_USB capability is enabled
+ */
+
+extern int dwc_otg_set_param_ic_usb_cap(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_ic_usb_cap(dwc_otg_core_if_t * core_if);
+#define dwc_param_ic_usb_cap_default 0
+
+extern int dwc_otg_set_param_ahb_thr_ratio(dwc_otg_core_if_t * core_if,
+                                          int32_t val);
+extern int32_t dwc_otg_get_param_ahb_thr_ratio(dwc_otg_core_if_t * core_if);
+#define dwc_param_ahb_thr_ratio_default 0
+
+extern int dwc_otg_set_param_power_down(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_power_down(dwc_otg_core_if_t * core_if);
+#define dwc_param_power_down_default 0
+
+extern int dwc_otg_set_param_reload_ctl(dwc_otg_core_if_t * core_if,
+                                       int32_t val);
+extern int32_t dwc_otg_get_param_reload_ctl(dwc_otg_core_if_t * core_if);
+#define dwc_param_reload_ctl_default 0
+
+extern int dwc_otg_set_param_dev_out_nak(dwc_otg_core_if_t * core_if,
+                                                                               int32_t val);
+extern int32_t dwc_otg_get_param_dev_out_nak(dwc_otg_core_if_t * core_if);
+#define dwc_param_dev_out_nak_default 0
+
+extern int dwc_otg_set_param_cont_on_bna(dwc_otg_core_if_t * core_if,
+                                                                                int32_t val);
+extern int32_t dwc_otg_get_param_cont_on_bna(dwc_otg_core_if_t * core_if);
+#define dwc_param_cont_on_bna_default 0
+
+extern int dwc_otg_set_param_ahb_single(dwc_otg_core_if_t * core_if,
+                                                                                int32_t val);
+extern int32_t dwc_otg_get_param_ahb_single(dwc_otg_core_if_t * core_if);
+#define dwc_param_ahb_single_default 0
+
+extern int dwc_otg_set_param_otg_ver(dwc_otg_core_if_t * core_if, int32_t val);
+extern int32_t dwc_otg_get_param_otg_ver(dwc_otg_core_if_t * core_if);
+#define dwc_param_otg_ver_default 0
+
+/** @} */
+
+/** @name Access to registers and bit-fields */
+
+/**
+ * Dump core registers and SPRAM
+ */
+extern void dwc_otg_dump_dev_registers(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_dump_spram(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_dump_host_registers(dwc_otg_core_if_t * _core_if);
+extern void dwc_otg_dump_global_registers(dwc_otg_core_if_t * _core_if);
+
+/**
+ * Get host negotiation status.
+ */
+extern uint32_t dwc_otg_get_hnpstatus(dwc_otg_core_if_t * core_if);
+
+/**
+ * Get srp status
+ */
+extern uint32_t dwc_otg_get_srpstatus(dwc_otg_core_if_t * core_if);
+
+/**
+ * Set hnpreq bit in the GOTGCTL register.
+ */
+extern void dwc_otg_set_hnpreq(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get Content of SNPSID register.
+ */
+extern uint32_t dwc_otg_get_gsnpsid(dwc_otg_core_if_t * core_if);
+
+/**
+ * Get current mode.
+ * Returns 0 if in device mode, and 1 if in host mode.
+ */
+extern uint32_t dwc_otg_get_mode(dwc_otg_core_if_t * core_if);
+
+/**
+ * Get value of hnpcapable field in the GUSBCFG register
+ */
+extern uint32_t dwc_otg_get_hnpcapable(dwc_otg_core_if_t * core_if);
+/**
+ * Set value of hnpcapable field in the GUSBCFG register
+ */
+extern void dwc_otg_set_hnpcapable(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get value of srpcapable field in the GUSBCFG register
+ */
+extern uint32_t dwc_otg_get_srpcapable(dwc_otg_core_if_t * core_if);
+/**
+ * Set value of srpcapable field in the GUSBCFG register
+ */
+extern void dwc_otg_set_srpcapable(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get value of devspeed field in the DCFG register
+ */
+extern uint32_t dwc_otg_get_devspeed(dwc_otg_core_if_t * core_if);
+/**
+ * Set value of devspeed field in the DCFG register
+ */
+extern void dwc_otg_set_devspeed(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get the value of busconnected field from the HPRT0 register
+ */
+extern uint32_t dwc_otg_get_busconnected(dwc_otg_core_if_t * core_if);
+
+/**
+ * Gets the device enumeration Speed.
+ */
+extern uint32_t dwc_otg_get_enumspeed(dwc_otg_core_if_t * core_if);
+
+/**
+ * Get value of prtpwr field from the HPRT0 register
+ */
+extern uint32_t dwc_otg_get_prtpower(dwc_otg_core_if_t * core_if);
+
+/**
+ * Get value of flag indicating core state - hibernated or not
+ */
+extern uint32_t dwc_otg_get_core_state(dwc_otg_core_if_t * core_if);
+
+/**
+ * Set value of prtpwr field from the HPRT0 register
+ */
+extern void dwc_otg_set_prtpower(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get value of prtsusp field from the HPRT0 regsiter
+ */
+extern uint32_t dwc_otg_get_prtsuspend(dwc_otg_core_if_t * core_if);
+/**
+ * Set value of prtpwr field from the HPRT0 register
+ */
+extern void dwc_otg_set_prtsuspend(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get value of ModeChTimEn field from the HCFG regsiter
+ */
+extern uint32_t dwc_otg_get_mode_ch_tim(dwc_otg_core_if_t * core_if);
+/**
+ * Set value of ModeChTimEn field from the HCFG regsiter
+ */
+extern void dwc_otg_set_mode_ch_tim(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get value of Fram Interval field from the HFIR regsiter
+ */
+extern uint32_t dwc_otg_get_fr_interval(dwc_otg_core_if_t * core_if);
+/**
+ * Set value of Frame Interval field from the HFIR regsiter
+ */
+extern void dwc_otg_set_fr_interval(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Set value of prtres field from the HPRT0 register
+ *FIXME Remove?
+ */
+extern void dwc_otg_set_prtresume(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get value of rmtwkupsig bit in DCTL register
+ */
+extern uint32_t dwc_otg_get_remotewakesig(dwc_otg_core_if_t * core_if);
+
+/**
+ * Get value of prt_sleep_sts field from the GLPMCFG register
+ */
+extern uint32_t dwc_otg_get_lpm_portsleepstatus(dwc_otg_core_if_t * core_if);
+
+/**
+ * Get value of rem_wkup_en field from the GLPMCFG register
+ */
+extern uint32_t dwc_otg_get_lpm_remotewakeenabled(dwc_otg_core_if_t * core_if);
+
+/**
+ * Get value of appl_resp field from the GLPMCFG register
+ */
+extern uint32_t dwc_otg_get_lpmresponse(dwc_otg_core_if_t * core_if);
+/**
+ * Set value of appl_resp field from the GLPMCFG register
+ */
+extern void dwc_otg_set_lpmresponse(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get value of hsic_connect field from the GLPMCFG register
+ */
+extern uint32_t dwc_otg_get_hsic_connect(dwc_otg_core_if_t * core_if);
+/**
+ * Set value of hsic_connect field from the GLPMCFG register
+ */
+extern void dwc_otg_set_hsic_connect(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * Get value of inv_sel_hsic field from the GLPMCFG register.
+ */
+extern uint32_t dwc_otg_get_inv_sel_hsic(dwc_otg_core_if_t * core_if);
+/**
+ * Set value of inv_sel_hsic field from the GLPMFG register.
+ */
+extern void dwc_otg_set_inv_sel_hsic(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/*
+ * Some functions for accessing registers
+ */
+
+/**
+ *  GOTGCTL register
+ */
+extern uint32_t dwc_otg_get_gotgctl(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_set_gotgctl(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * GUSBCFG register
+ */
+extern uint32_t dwc_otg_get_gusbcfg(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_set_gusbcfg(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * GRXFSIZ register
+ */
+extern uint32_t dwc_otg_get_grxfsiz(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_set_grxfsiz(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * GNPTXFSIZ register
+ */
+extern uint32_t dwc_otg_get_gnptxfsiz(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_set_gnptxfsiz(dwc_otg_core_if_t * core_if, uint32_t val);
+
+extern uint32_t dwc_otg_get_gpvndctl(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_set_gpvndctl(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * GGPIO register
+ */
+extern uint32_t dwc_otg_get_ggpio(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_set_ggpio(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * GUID register
+ */
+extern uint32_t dwc_otg_get_guid(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_set_guid(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * HPRT0 register
+ */
+extern uint32_t dwc_otg_get_hprt0(dwc_otg_core_if_t * core_if);
+extern void dwc_otg_set_hprt0(dwc_otg_core_if_t * core_if, uint32_t val);
+
+/**
+ * GHPTXFSIZE
+ */
+extern uint32_t dwc_otg_get_hptxfsiz(dwc_otg_core_if_t * core_if);
+
+/** @} */
+
+#endif                         /* __DWC_CORE_IF_H__ */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_dbg.h
@@ -0,0 +1,117 @@
+/* ==========================================================================
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+#ifndef __DWC_OTG_DBG_H__
+#define __DWC_OTG_DBG_H__
+
+/** @file
+ * This file defines debug levels.
+ * Debugging support vanishes in non-debug builds.
+ */
+
+/**
+ * The Debug Level bit-mask variable.
+ */
+extern uint32_t g_dbg_lvl;
+/**
+ * Set the Debug Level variable.
+ */
+static inline uint32_t SET_DEBUG_LEVEL(const uint32_t new)
+{
+       uint32_t old = g_dbg_lvl;
+       g_dbg_lvl = new;
+       return old;
+}
+
+#define DBG_USER       (0x1)
+/** When debug level has the DBG_CIL bit set, display CIL Debug messages. */
+#define DBG_CIL                (0x2)
+/** When debug level has the DBG_CILV bit set, display CIL Verbose debug
+ * messages */
+#define DBG_CILV       (0x20)
+/**  When debug level has the DBG_PCD bit set, display PCD (Device) debug
+ *  messages */
+#define DBG_PCD                (0x4)
+/** When debug level has the DBG_PCDV set, display PCD (Device) Verbose debug
+ * messages */
+#define DBG_PCDV       (0x40)
+/** When debug level has the DBG_HCD bit set, display Host debug messages */
+#define DBG_HCD                (0x8)
+/** When debug level has the DBG_HCDV bit set, display Verbose Host debug
+ * messages */
+#define DBG_HCDV       (0x80)
+/** When debug level has the DBG_HCD_URB bit set, display enqueued URBs in host
+ *  mode. */
+#define DBG_HCD_URB    (0x800)
+/** When debug level has the DBG_HCDI bit set, display host interrupt
+ *  messages. */
+#define DBG_HCDI       (0x1000)
+
+/** When debug level has any bit set, display debug messages */
+#define DBG_ANY                (0xFF)
+
+/** All debug messages off */
+#define DBG_OFF                0
+
+/** Prefix string for DWC_DEBUG print macros. */
+#define USB_DWC "DWC_otg: "
+
+/**
+ * Print a debug message when the Global debug level variable contains
+ * the bit defined in <code>lvl</code>.
+ *
+ * @param[in] lvl - Debug level, use one of the DBG_ constants above.
+ * @param[in] x - like printf
+ *
+ *    Example:<p>
+ * <code>
+ *      DWC_DEBUGPL( DBG_ANY, "%s(%p)\n", __func__, _reg_base_addr);
+ * </code>
+ * <br>
+ * results in:<br>
+ * <code>
+ * usb-DWC_otg: dwc_otg_cil_init(ca867000)
+ * </code>
+ */
+#ifdef DEBUG
+
+# define DWC_DEBUGPL(lvl, x...) do{ if ((lvl)&g_dbg_lvl)__DWC_DEBUG(USB_DWC x ); }while(0)
+# define DWC_DEBUGP(x...)      DWC_DEBUGPL(DBG_ANY, x )
+
+# define CHK_DEBUG_LEVEL(level) ((level) & g_dbg_lvl)
+
+#else
+
+# define DWC_DEBUGPL(lvl, x...) do{}while(0)
+# define DWC_DEBUGP(x...)
+
+# define CHK_DEBUG_LEVEL(level) (0)
+
+#endif /*DEBUG*/
+#endif
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_driver.c
@@ -0,0 +1,1772 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_driver.c $
+ * $Revision: #92 $
+ * $Date: 2012/08/10 $
+ * $Change: 2047372 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+/** @file
+ * The dwc_otg_driver module provides the initialization and cleanup entry
+ * points for the DWC_otg driver. This module will be dynamically installed
+ * after Linux is booted using the insmod command. When the module is
+ * installed, the dwc_otg_driver_init function is called. When the module is
+ * removed (using rmmod), the dwc_otg_driver_cleanup function is called.
+ *
+ * This module also defines a data structure for the dwc_otg_driver, which is
+ * used in conjunction with the standard ARM lm_device structure. These
+ * structures allow the OTG driver to comply with the standard Linux driver
+ * model in which devices and drivers are registered with a bus driver. This
+ * has the benefit that Linux can expose attributes of the driver and device
+ * in its special sysfs file system. Users can then read or write files in
+ * this file system to perform diagnostics on the driver components or the
+ * device.
+ */
+
+#include "dwc_otg_os_dep.h"
+#include "dwc_os.h"
+#include "dwc_otg_dbg.h"
+#include "dwc_otg_driver.h"
+#include "dwc_otg_attr.h"
+#include "dwc_otg_core_if.h"
+#include "dwc_otg_pcd_if.h"
+#include "dwc_otg_hcd_if.h"
+#include "dwc_otg_fiq_fsm.h"
+
+#define DWC_DRIVER_VERSION     "3.00a 10-AUG-2012"
+#define DWC_DRIVER_DESC                "HS OTG USB Controller driver"
+
+bool microframe_schedule=true;
+
+static const char dwc_driver_name[] = "dwc_otg";
+
+
+extern int pcd_init(
+#ifdef LM_INTERFACE
+                          struct lm_device *_dev
+#elif  defined(PCI_INTERFACE)
+                          struct pci_dev *_dev
+#elif  defined(PLATFORM_INTERFACE)
+       struct platform_device *dev
+#endif
+    );
+extern int hcd_init(
+#ifdef LM_INTERFACE
+                          struct lm_device *_dev
+#elif  defined(PCI_INTERFACE)
+                          struct pci_dev *_dev
+#elif  defined(PLATFORM_INTERFACE)
+       struct platform_device *dev
+#endif
+    );
+
+extern int pcd_remove(
+#ifdef LM_INTERFACE
+                            struct lm_device *_dev
+#elif  defined(PCI_INTERFACE)
+                            struct pci_dev *_dev
+#elif  defined(PLATFORM_INTERFACE)
+       struct platform_device *_dev
+#endif
+    );
+
+extern void hcd_remove(
+#ifdef LM_INTERFACE
+                             struct lm_device *_dev
+#elif  defined(PCI_INTERFACE)
+                             struct pci_dev *_dev
+#elif  defined(PLATFORM_INTERFACE)
+       struct platform_device *_dev
+#endif
+    );
+
+extern void dwc_otg_adp_start(dwc_otg_core_if_t * core_if, uint8_t is_host);
+
+/*-------------------------------------------------------------------------*/
+/* Encapsulate the module parameter settings */
+
+struct dwc_otg_driver_module_params {
+       int32_t opt;
+       int32_t otg_cap;
+       int32_t dma_enable;
+       int32_t dma_desc_enable;
+       int32_t dma_burst_size;
+       int32_t speed;
+       int32_t host_support_fs_ls_low_power;
+       int32_t host_ls_low_power_phy_clk;
+       int32_t enable_dynamic_fifo;
+       int32_t data_fifo_size;
+       int32_t dev_rx_fifo_size;
+       int32_t dev_nperio_tx_fifo_size;
+       uint32_t dev_perio_tx_fifo_size[MAX_PERIO_FIFOS];
+       int32_t host_rx_fifo_size;
+       int32_t host_nperio_tx_fifo_size;
+       int32_t host_perio_tx_fifo_size;
+       int32_t max_transfer_size;
+       int32_t max_packet_count;
+       int32_t host_channels;
+       int32_t dev_endpoints;
+       int32_t phy_type;
+       int32_t phy_utmi_width;
+       int32_t phy_ulpi_ddr;
+       int32_t phy_ulpi_ext_vbus;
+       int32_t i2c_enable;
+       int32_t ulpi_fs_ls;
+       int32_t ts_dline;
+       int32_t en_multiple_tx_fifo;
+       uint32_t dev_tx_fifo_size[MAX_TX_FIFOS];
+       uint32_t thr_ctl;
+       uint32_t tx_thr_length;
+       uint32_t rx_thr_length;
+       int32_t pti_enable;
+       int32_t mpi_enable;
+       int32_t lpm_enable;
+       int32_t ic_usb_cap;
+       int32_t ahb_thr_ratio;
+       int32_t power_down;
+       int32_t reload_ctl;
+       int32_t dev_out_nak;
+       int32_t cont_on_bna;
+       int32_t ahb_single;
+       int32_t otg_ver;
+       int32_t adp_enable;
+};
+
+static struct dwc_otg_driver_module_params dwc_otg_module_params = {
+       .opt = -1,
+       .otg_cap = -1,
+       .dma_enable = -1,
+       .dma_desc_enable = -1,
+       .dma_burst_size = -1,
+       .speed = -1,
+       .host_support_fs_ls_low_power = -1,
+       .host_ls_low_power_phy_clk = -1,
+       .enable_dynamic_fifo = -1,
+       .data_fifo_size = -1,
+       .dev_rx_fifo_size = -1,
+       .dev_nperio_tx_fifo_size = -1,
+       .dev_perio_tx_fifo_size = {
+                                  /* dev_perio_tx_fifo_size_1 */
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1,
+                                  -1
+                                  /* 15 */
+                                  },
+       .host_rx_fifo_size = -1,
+       .host_nperio_tx_fifo_size = -1,
+       .host_perio_tx_fifo_size = -1,
+       .max_transfer_size = -1,
+       .max_packet_count = -1,
+       .host_channels = -1,
+       .dev_endpoints = -1,
+       .phy_type = -1,
+       .phy_utmi_width = -1,
+       .phy_ulpi_ddr = -1,
+       .phy_ulpi_ext_vbus = -1,
+       .i2c_enable = -1,
+       .ulpi_fs_ls = -1,
+       .ts_dline = -1,
+       .en_multiple_tx_fifo = -1,
+       .dev_tx_fifo_size = {
+                            /* dev_tx_fifo_size */
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1,
+                            -1
+                            /* 15 */
+                            },
+       .thr_ctl = -1,
+       .tx_thr_length = -1,
+       .rx_thr_length = -1,
+       .pti_enable = -1,
+       .mpi_enable = -1,
+       .lpm_enable = 0,
+       .ic_usb_cap = -1,
+       .ahb_thr_ratio = -1,
+       .power_down = -1,
+       .reload_ctl = -1,
+       .dev_out_nak = -1,
+       .cont_on_bna = -1,
+       .ahb_single = -1,
+       .otg_ver = -1,
+       .adp_enable = -1,
+};
+
+//Global variable to switch the fiq fix on or off
+bool fiq_enable = 1;
+// Global variable to enable the split transaction fix
+bool fiq_fsm_enable = true;
+//Bulk split-transaction NAK holdoff in microframes
+uint16_t nak_holdoff = 8;
+
+//Force host mode during CIL re-init
+bool cil_force_host = true;
+
+unsigned short fiq_fsm_mask = 0x0F;
+
+unsigned short int_ep_interval_min = 0;
+/**
+ * This function shows the Driver Version.
+ */
+static ssize_t version_show(struct device_driver *dev, char *buf)
+{
+       return snprintf(buf, sizeof(DWC_DRIVER_VERSION) + 2, "%s\n",
+                       DWC_DRIVER_VERSION);
+}
+
+static DRIVER_ATTR_RO(version);
+
+/**
+ * Global Debug Level Mask.
+ */
+uint32_t g_dbg_lvl = 0;                /* OFF */
+
+/**
+ * This function shows the driver Debug Level.
+ */
+static ssize_t debuglevel_show(struct device_driver *drv, char *buf)
+{
+       return sprintf(buf, "0x%0x\n", g_dbg_lvl);
+}
+
+/**
+ * This function stores the driver Debug Level.
+ */
+static ssize_t debuglevel_store(struct device_driver *drv, const char *buf,
+                              size_t count)
+{
+       g_dbg_lvl = simple_strtoul(buf, NULL, 16);
+       return count;
+}
+
+static DRIVER_ATTR_RW(debuglevel);
+
+/**
+ * This function is called during module intialization
+ * to pass module parameters to the DWC_OTG CORE.
+ */
+static int set_parameters(dwc_otg_core_if_t * core_if)
+{
+       int retval = 0;
+       int i;
+
+       if (dwc_otg_module_params.otg_cap != -1) {
+               retval +=
+                   dwc_otg_set_param_otg_cap(core_if,
+                                             dwc_otg_module_params.otg_cap);
+       }
+       if (dwc_otg_module_params.dma_enable != -1) {
+               retval +=
+                   dwc_otg_set_param_dma_enable(core_if,
+                                                dwc_otg_module_params.
+                                                dma_enable);
+       }
+       if (dwc_otg_module_params.dma_desc_enable != -1) {
+               retval +=
+                   dwc_otg_set_param_dma_desc_enable(core_if,
+                                                     dwc_otg_module_params.
+                                                     dma_desc_enable);
+       }
+       if (dwc_otg_module_params.opt != -1) {
+               retval +=
+                   dwc_otg_set_param_opt(core_if, dwc_otg_module_params.opt);
+       }
+       if (dwc_otg_module_params.dma_burst_size != -1) {
+               retval +=
+                   dwc_otg_set_param_dma_burst_size(core_if,
+                                                    dwc_otg_module_params.
+                                                    dma_burst_size);
+       }
+       if (dwc_otg_module_params.host_support_fs_ls_low_power != -1) {
+               retval +=
+                   dwc_otg_set_param_host_support_fs_ls_low_power(core_if,
+                                                                  dwc_otg_module_params.
+                                                                  host_support_fs_ls_low_power);
+       }
+       if (dwc_otg_module_params.enable_dynamic_fifo != -1) {
+               retval +=
+                   dwc_otg_set_param_enable_dynamic_fifo(core_if,
+                                                         dwc_otg_module_params.
+                                                         enable_dynamic_fifo);
+       }
+       if (dwc_otg_module_params.data_fifo_size != -1) {
+               retval +=
+                   dwc_otg_set_param_data_fifo_size(core_if,
+                                                    dwc_otg_module_params.
+                                                    data_fifo_size);
+       }
+       if (dwc_otg_module_params.dev_rx_fifo_size != -1) {
+               retval +=
+                   dwc_otg_set_param_dev_rx_fifo_size(core_if,
+                                                      dwc_otg_module_params.
+                                                      dev_rx_fifo_size);
+       }
+       if (dwc_otg_module_params.dev_nperio_tx_fifo_size != -1) {
+               retval +=
+                   dwc_otg_set_param_dev_nperio_tx_fifo_size(core_if,
+                                                             dwc_otg_module_params.
+                                                             dev_nperio_tx_fifo_size);
+       }
+       if (dwc_otg_module_params.host_rx_fifo_size != -1) {
+               retval +=
+                   dwc_otg_set_param_host_rx_fifo_size(core_if,
+                                                       dwc_otg_module_params.host_rx_fifo_size);
+       }
+       if (dwc_otg_module_params.host_nperio_tx_fifo_size != -1) {
+               retval +=
+                   dwc_otg_set_param_host_nperio_tx_fifo_size(core_if,
+                                                              dwc_otg_module_params.
+                                                              host_nperio_tx_fifo_size);
+       }
+       if (dwc_otg_module_params.host_perio_tx_fifo_size != -1) {
+               retval +=
+                   dwc_otg_set_param_host_perio_tx_fifo_size(core_if,
+                                                             dwc_otg_module_params.
+                                                             host_perio_tx_fifo_size);
+       }
+       if (dwc_otg_module_params.max_transfer_size != -1) {
+               retval +=
+                   dwc_otg_set_param_max_transfer_size(core_if,
+                                                       dwc_otg_module_params.
+                                                       max_transfer_size);
+       }
+       if (dwc_otg_module_params.max_packet_count != -1) {
+               retval +=
+                   dwc_otg_set_param_max_packet_count(core_if,
+                                                      dwc_otg_module_params.
+                                                      max_packet_count);
+       }
+       if (dwc_otg_module_params.host_channels != -1) {
+               retval +=
+                   dwc_otg_set_param_host_channels(core_if,
+                                                   dwc_otg_module_params.
+                                                   host_channels);
+       }
+       if (dwc_otg_module_params.dev_endpoints != -1) {
+               retval +=
+                   dwc_otg_set_param_dev_endpoints(core_if,
+                                                   dwc_otg_module_params.
+                                                   dev_endpoints);
+       }
+       if (dwc_otg_module_params.phy_type != -1) {
+               retval +=
+                   dwc_otg_set_param_phy_type(core_if,
+                                              dwc_otg_module_params.phy_type);
+       }
+       if (dwc_otg_module_params.speed != -1) {
+               retval +=
+                   dwc_otg_set_param_speed(core_if,
+                                           dwc_otg_module_params.speed);
+       }
+       if (dwc_otg_module_params.host_ls_low_power_phy_clk != -1) {
+               retval +=
+                   dwc_otg_set_param_host_ls_low_power_phy_clk(core_if,
+                                                               dwc_otg_module_params.
+                                                               host_ls_low_power_phy_clk);
+       }
+       if (dwc_otg_module_params.phy_ulpi_ddr != -1) {
+               retval +=
+                   dwc_otg_set_param_phy_ulpi_ddr(core_if,
+                                                  dwc_otg_module_params.
+                                                  phy_ulpi_ddr);
+       }
+       if (dwc_otg_module_params.phy_ulpi_ext_vbus != -1) {
+               retval +=
+                   dwc_otg_set_param_phy_ulpi_ext_vbus(core_if,
+                                                       dwc_otg_module_params.
+                                                       phy_ulpi_ext_vbus);
+       }
+       if (dwc_otg_module_params.phy_utmi_width != -1) {
+               retval +=
+                   dwc_otg_set_param_phy_utmi_width(core_if,
+                                                    dwc_otg_module_params.
+                                                    phy_utmi_width);
+       }
+       if (dwc_otg_module_params.ulpi_fs_ls != -1) {
+               retval +=
+                   dwc_otg_set_param_ulpi_fs_ls(core_if,
+                                                dwc_otg_module_params.ulpi_fs_ls);
+       }
+       if (dwc_otg_module_params.ts_dline != -1) {
+               retval +=
+                   dwc_otg_set_param_ts_dline(core_if,
+                                              dwc_otg_module_params.ts_dline);
+       }
+       if (dwc_otg_module_params.i2c_enable != -1) {
+               retval +=
+                   dwc_otg_set_param_i2c_enable(core_if,
+                                                dwc_otg_module_params.
+                                                i2c_enable);
+       }
+       if (dwc_otg_module_params.en_multiple_tx_fifo != -1) {
+               retval +=
+                   dwc_otg_set_param_en_multiple_tx_fifo(core_if,
+                                                         dwc_otg_module_params.
+                                                         en_multiple_tx_fifo);
+       }
+       for (i = 0; i < 15; i++) {
+               if (dwc_otg_module_params.dev_perio_tx_fifo_size[i] != -1) {
+                       retval +=
+                           dwc_otg_set_param_dev_perio_tx_fifo_size(core_if,
+                                                                    dwc_otg_module_params.
+                                                                    dev_perio_tx_fifo_size
+                                                                    [i], i);
+               }
+       }
+
+       for (i = 0; i < 15; i++) {
+               if (dwc_otg_module_params.dev_tx_fifo_size[i] != -1) {
+                       retval += dwc_otg_set_param_dev_tx_fifo_size(core_if,
+                                                                    dwc_otg_module_params.
+                                                                    dev_tx_fifo_size
+                                                                    [i], i);
+               }
+       }
+       if (dwc_otg_module_params.thr_ctl != -1) {
+               retval +=
+                   dwc_otg_set_param_thr_ctl(core_if,
+                                             dwc_otg_module_params.thr_ctl);
+       }
+       if (dwc_otg_module_params.mpi_enable != -1) {
+               retval +=
+                   dwc_otg_set_param_mpi_enable(core_if,
+                                                dwc_otg_module_params.
+                                                mpi_enable);
+       }
+       if (dwc_otg_module_params.pti_enable != -1) {
+               retval +=
+                   dwc_otg_set_param_pti_enable(core_if,
+                                                dwc_otg_module_params.
+                                                pti_enable);
+       }
+       if (dwc_otg_module_params.lpm_enable != -1) {
+               retval +=
+                   dwc_otg_set_param_lpm_enable(core_if,
+                                                dwc_otg_module_params.
+                                                lpm_enable);
+       }
+       if (dwc_otg_module_params.ic_usb_cap != -1) {
+               retval +=
+                   dwc_otg_set_param_ic_usb_cap(core_if,
+                                                dwc_otg_module_params.
+                                                ic_usb_cap);
+       }
+       if (dwc_otg_module_params.tx_thr_length != -1) {
+               retval +=
+                   dwc_otg_set_param_tx_thr_length(core_if,
+                                                   dwc_otg_module_params.tx_thr_length);
+       }
+       if (dwc_otg_module_params.rx_thr_length != -1) {
+               retval +=
+                   dwc_otg_set_param_rx_thr_length(core_if,
+                                                   dwc_otg_module_params.
+                                                   rx_thr_length);
+       }
+       if (dwc_otg_module_params.ahb_thr_ratio != -1) {
+               retval +=
+                   dwc_otg_set_param_ahb_thr_ratio(core_if,
+                                                   dwc_otg_module_params.ahb_thr_ratio);
+       }
+       if (dwc_otg_module_params.power_down != -1) {
+               retval +=
+                   dwc_otg_set_param_power_down(core_if,
+                                                dwc_otg_module_params.power_down);
+       }
+       if (dwc_otg_module_params.reload_ctl != -1) {
+               retval +=
+                   dwc_otg_set_param_reload_ctl(core_if,
+                                                dwc_otg_module_params.reload_ctl);
+       }
+
+       if (dwc_otg_module_params.dev_out_nak != -1) {
+               retval +=
+                       dwc_otg_set_param_dev_out_nak(core_if,
+                       dwc_otg_module_params.dev_out_nak);
+       }
+
+       if (dwc_otg_module_params.cont_on_bna != -1) {
+               retval +=
+                       dwc_otg_set_param_cont_on_bna(core_if,
+                       dwc_otg_module_params.cont_on_bna);
+       }
+
+       if (dwc_otg_module_params.ahb_single != -1) {
+               retval +=
+                       dwc_otg_set_param_ahb_single(core_if,
+                       dwc_otg_module_params.ahb_single);
+       }
+
+       if (dwc_otg_module_params.otg_ver != -1) {
+               retval +=
+                   dwc_otg_set_param_otg_ver(core_if,
+                                             dwc_otg_module_params.otg_ver);
+       }
+       if (dwc_otg_module_params.adp_enable != -1) {
+               retval +=
+                   dwc_otg_set_param_adp_enable(core_if,
+                                                dwc_otg_module_params.
+                                                adp_enable);
+       }
+       return retval;
+}
+
+/**
+ * This function is the top level interrupt handler for the Common
+ * (Device and host modes) interrupts.
+ */
+static irqreturn_t dwc_otg_common_irq(int irq, void *dev)
+{
+       int32_t retval = IRQ_NONE;
+
+       retval = dwc_otg_handle_common_intr(dev);
+       if (retval != 0) {
+               S3C2410X_CLEAR_EINTPEND();
+       }
+       return IRQ_RETVAL(retval);
+}
+
+/**
+ * This function is called when a lm_device is unregistered with the
+ * dwc_otg_driver. This happens, for example, when the rmmod command is
+ * executed. The device may or may not be electrically present. If it is
+ * present, the driver stops device processing. Any resources used on behalf
+ * of this device are freed.
+ *
+ * @param _dev
+ */
+#ifdef LM_INTERFACE
+#define REM_RETVAL(n)
+static void dwc_otg_driver_remove(      struct lm_device *_dev )
+{       dwc_otg_device_t *otg_dev = lm_get_drvdata(_dev);
+#elif  defined(PCI_INTERFACE)
+#define REM_RETVAL(n)
+static void dwc_otg_driver_remove(      struct pci_dev *_dev )
+{      dwc_otg_device_t *otg_dev = pci_get_drvdata(_dev);
+#elif  defined(PLATFORM_INTERFACE)
+#define REM_RETVAL(n) n
+static int dwc_otg_driver_remove(        struct platform_device *_dev )
+{       dwc_otg_device_t *otg_dev = platform_get_drvdata(_dev);
+#endif
+
+       DWC_DEBUGPL(DBG_ANY, "%s(%p) otg_dev %p\n", __func__, _dev, otg_dev);
+
+       if (!otg_dev) {
+               /* Memory allocation for the dwc_otg_device failed. */
+               DWC_DEBUGPL(DBG_ANY, "%s: otg_dev NULL!\n", __func__);
+                return REM_RETVAL(-ENOMEM);
+       }
+#ifndef DWC_DEVICE_ONLY
+       if (otg_dev->hcd) {
+               hcd_remove(_dev);
+       } else {
+               DWC_DEBUGPL(DBG_ANY, "%s: otg_dev->hcd NULL!\n", __func__);
+                return REM_RETVAL(-EINVAL);
+       }
+#endif
+
+#ifndef DWC_HOST_ONLY
+       if (otg_dev->pcd) {
+               pcd_remove(_dev);
+       } else {
+               DWC_DEBUGPL(DBG_ANY, "%s: otg_dev->pcd NULL!\n", __func__);
+                return REM_RETVAL(-EINVAL);
+       }
+#endif
+       /*
+        * Free the IRQ
+        */
+       if (otg_dev->common_irq_installed) {
+               free_irq(otg_dev->os_dep.irq_num, otg_dev);
+        } else {
+               DWC_DEBUGPL(DBG_ANY, "%s: There is no installed irq!\n", __func__);
+               return REM_RETVAL(-ENXIO);
+       }
+
+       if (otg_dev->core_if) {
+               dwc_otg_cil_remove(otg_dev->core_if);
+       } else {
+               DWC_DEBUGPL(DBG_ANY, "%s: otg_dev->core_if NULL!\n", __func__);
+               return REM_RETVAL(-ENXIO);
+       }
+
+       /*
+        * Remove the device attributes
+        */
+       dwc_otg_attr_remove(_dev);
+
+       /*
+        * Return the memory.
+        */
+       if (otg_dev->os_dep.base) {
+               iounmap(otg_dev->os_dep.base);
+       }
+       DWC_FREE(otg_dev);
+
+       /*
+        * Clear the drvdata pointer.
+        */
+#ifdef LM_INTERFACE
+       lm_set_drvdata(_dev, 0);
+#elif defined(PCI_INTERFACE)
+        release_mem_region(otg_dev->os_dep.rsrc_start,
+                           otg_dev->os_dep.rsrc_len);
+       pci_set_drvdata(_dev, 0);
+#elif  defined(PLATFORM_INTERFACE)
+        platform_set_drvdata(_dev, 0);
+#endif
+        return REM_RETVAL(0);
+}
+
+/**
+ * This function is called when an lm_device is bound to a
+ * dwc_otg_driver. It creates the driver components required to
+ * control the device (CIL, HCD, and PCD) and it initializes the
+ * device. The driver components are stored in a dwc_otg_device
+ * structure. A reference to the dwc_otg_device is saved in the
+ * lm_device. This allows the driver to access the dwc_otg_device
+ * structure on subsequent calls to driver methods for this device.
+ *
+ * @param _dev Bus device
+ */
+static int dwc_otg_driver_probe(
+#ifdef LM_INTERFACE
+                                      struct lm_device *_dev
+#elif defined(PCI_INTERFACE)
+                                      struct pci_dev *_dev,
+                                      const struct pci_device_id *id
+#elif  defined(PLATFORM_INTERFACE)
+                                       struct platform_device *_dev
+#endif
+    )
+{
+       int retval = 0;
+       dwc_otg_device_t *dwc_otg_device;
+        int devirq;
+
+       dev_dbg(&_dev->dev, "dwc_otg_driver_probe(%p)\n", _dev);
+#ifdef LM_INTERFACE
+       dev_dbg(&_dev->dev, "start=0x%08x\n", (unsigned)_dev->resource.start);
+#elif defined(PCI_INTERFACE)
+       if (!id) {
+               DWC_ERROR("Invalid pci_device_id %p", id);
+               return -EINVAL;
+       }
+
+       if (!_dev || (pci_enable_device(_dev) < 0)) {
+               DWC_ERROR("Invalid pci_device %p", _dev);
+               return -ENODEV;
+       }
+       dev_dbg(&_dev->dev, "start=0x%08x\n", (unsigned)pci_resource_start(_dev,0));
+       /* other stuff needed as well? */
+
+#elif  defined(PLATFORM_INTERFACE)
+       dev_dbg(&_dev->dev, "start=0x%08x (len 0x%x)\n",
+                (unsigned)_dev->resource->start,
+                (unsigned)(_dev->resource->end - _dev->resource->start));
+#endif
+
+       dwc_otg_device = DWC_ALLOC(sizeof(dwc_otg_device_t));
+
+       if (!dwc_otg_device) {
+               dev_err(&_dev->dev, "kmalloc of dwc_otg_device failed\n");
+               return -ENOMEM;
+       }
+
+       memset(dwc_otg_device, 0, sizeof(*dwc_otg_device));
+       dwc_otg_device->os_dep.reg_offset = 0xFFFFFFFF;
+       dwc_otg_device->os_dep.platformdev = _dev;
+
+       /*
+        * Map the DWC_otg Core memory into virtual address space.
+        */
+#ifdef LM_INTERFACE
+       dwc_otg_device->os_dep.base = ioremap(_dev->resource.start, SZ_256K);
+
+       if (!dwc_otg_device->os_dep.base) {
+               dev_err(&_dev->dev, "ioremap() failed\n");
+               DWC_FREE(dwc_otg_device);
+               return -ENOMEM;
+       }
+       dev_dbg(&_dev->dev, "base=0x%08x\n",
+               (unsigned)dwc_otg_device->os_dep.base);
+#elif defined(PCI_INTERFACE)
+       _dev->current_state = PCI_D0;
+       _dev->dev.power.power_state = PMSG_ON;
+
+       if (!_dev->irq) {
+               DWC_ERROR("Found HC with no IRQ. Check BIOS/PCI %s setup!",
+                         pci_name(_dev));
+               iounmap(dwc_otg_device->os_dep.base);
+               DWC_FREE(dwc_otg_device);
+               return -ENODEV;
+       }
+
+       dwc_otg_device->os_dep.rsrc_start = pci_resource_start(_dev, 0);
+       dwc_otg_device->os_dep.rsrc_len = pci_resource_len(_dev, 0);
+       DWC_DEBUGPL(DBG_ANY, "PCI resource: start=%08x, len=%08x\n",
+                   (unsigned)dwc_otg_device->os_dep.rsrc_start,
+                   (unsigned)dwc_otg_device->os_dep.rsrc_len);
+       if (!request_mem_region
+           (dwc_otg_device->os_dep.rsrc_start, dwc_otg_device->os_dep.rsrc_len,
+            "dwc_otg")) {
+               dev_dbg(&_dev->dev, "error requesting memory\n");
+               iounmap(dwc_otg_device->os_dep.base);
+               DWC_FREE(dwc_otg_device);
+               return -EFAULT;
+       }
+
+       dwc_otg_device->os_dep.base =
+           ioremap_nocache(dwc_otg_device->os_dep.rsrc_start,
+                           dwc_otg_device->os_dep.rsrc_len);
+       if (dwc_otg_device->os_dep.base == NULL) {
+               dev_dbg(&_dev->dev, "error mapping memory\n");
+               release_mem_region(dwc_otg_device->os_dep.rsrc_start,
+                                  dwc_otg_device->os_dep.rsrc_len);
+               iounmap(dwc_otg_device->os_dep.base);
+               DWC_FREE(dwc_otg_device);
+               return -EFAULT;
+       }
+       dev_dbg(&_dev->dev, "base=0x%p (before adjust) \n",
+               dwc_otg_device->os_dep.base);
+       dwc_otg_device->os_dep.base = (char *)dwc_otg_device->os_dep.base;
+       dev_dbg(&_dev->dev, "base=0x%p (after adjust) \n",
+               dwc_otg_device->os_dep.base);
+       dev_dbg(&_dev->dev, "%s: mapped PA 0x%x to VA 0x%p\n", __func__,
+               (unsigned)dwc_otg_device->os_dep.rsrc_start,
+               dwc_otg_device->os_dep.base);
+
+       pci_set_master(_dev);
+       pci_set_drvdata(_dev, dwc_otg_device);
+#elif defined(PLATFORM_INTERFACE)
+        DWC_DEBUGPL(DBG_ANY,"Platform resource: start=%08x, len=%08x\n",
+                    _dev->resource->start,
+                    _dev->resource->end - _dev->resource->start + 1);
+#if 1
+        if (!request_mem_region(_dev->resource[0].start,
+                                _dev->resource[0].end - _dev->resource[0].start + 1,
+                                "dwc_otg")) {
+          dev_dbg(&_dev->dev, "error reserving mapped memory\n");
+          retval = -EFAULT;
+          goto fail;
+        }
+
+       dwc_otg_device->os_dep.base = ioremap_nocache(_dev->resource[0].start,
+                                                      _dev->resource[0].end -
+                                                      _dev->resource[0].start+1);
+       if (fiq_enable)
+       {
+               if (!request_mem_region(_dev->resource[1].start,
+                                       _dev->resource[1].end - _dev->resource[1].start + 1,
+                                       "dwc_otg")) {
+                       dev_dbg(&_dev->dev, "error reserving mapped memory\n");
+                       retval = -EFAULT;
+                       goto fail;
+               }
+
+               dwc_otg_device->os_dep.mphi_base = ioremap_nocache(_dev->resource[1].start,
+                                                           _dev->resource[1].end -
+                                                           _dev->resource[1].start + 1);
+               dwc_otg_device->os_dep.use_swirq = (_dev->resource[1].end - _dev->resource[1].start) == 0x200;
+       }
+
+#else
+        {
+                struct map_desc desc = {
+                    .virtual = IO_ADDRESS((unsigned)_dev->resource->start),
+                    .pfn     = __phys_to_pfn((unsigned)_dev->resource->start),
+                    .length  = SZ_128K,
+                    .type    = MT_DEVICE
+                };
+                iotable_init(&desc, 1);
+                dwc_otg_device->os_dep.base = (void *)desc.virtual;
+        }
+#endif
+       if (!dwc_otg_device->os_dep.base) {
+               dev_err(&_dev->dev, "ioremap() failed\n");
+               retval = -ENOMEM;
+               goto fail;
+       }
+#endif
+
+       /*
+        * Initialize driver data to point to the global DWC_otg
+        * Device structure.
+        */
+#ifdef LM_INTERFACE
+       lm_set_drvdata(_dev, dwc_otg_device);
+#elif defined(PLATFORM_INTERFACE)
+       platform_set_drvdata(_dev, dwc_otg_device);
+#endif
+       dev_dbg(&_dev->dev, "dwc_otg_device=0x%p\n", dwc_otg_device);
+
+       dwc_otg_device->core_if = dwc_otg_cil_init(dwc_otg_device->os_dep.base);
+        DWC_DEBUGPL(DBG_HCDV, "probe of device %p given core_if %p\n",
+                    dwc_otg_device, dwc_otg_device->core_if);//GRAYG
+
+       if (!dwc_otg_device->core_if) {
+               dev_err(&_dev->dev, "CIL initialization failed!\n");
+               retval = -ENOMEM;
+               goto fail;
+       }
+
+       dev_dbg(&_dev->dev, "Calling get_gsnpsid\n");
+       /*
+        * Attempt to ensure this device is really a DWC_otg Controller.
+        * Read and verify the SNPSID register contents. The value should be
+        * 0x45F42XXX or 0x45F42XXX, which corresponds to either "OT2" or "OTG3",
+        * as in "OTG version 2.XX" or "OTG version 3.XX".
+        */
+
+       if (((dwc_otg_get_gsnpsid(dwc_otg_device->core_if) & 0xFFFFF000) !=     0x4F542000) &&
+               ((dwc_otg_get_gsnpsid(dwc_otg_device->core_if) & 0xFFFFF000) != 0x4F543000)) {
+               dev_err(&_dev->dev, "Bad value for SNPSID: 0x%08x\n",
+                       dwc_otg_get_gsnpsid(dwc_otg_device->core_if));
+               retval = -EINVAL;
+               goto fail;
+       }
+
+       /*
+        * Validate parameter values.
+        */
+       dev_dbg(&_dev->dev, "Calling set_parameters\n");
+       if (set_parameters(dwc_otg_device->core_if)) {
+               retval = -EINVAL;
+               goto fail;
+       }
+
+       /*
+        * Create Device Attributes in sysfs
+        */
+       dev_dbg(&_dev->dev, "Calling attr_create\n");
+       dwc_otg_attr_create(_dev);
+
+       /*
+        * Disable the global interrupt until all the interrupt
+        * handlers are installed.
+        */
+       dev_dbg(&_dev->dev, "Calling disable_global_interrupts\n");
+       dwc_otg_disable_global_interrupts(dwc_otg_device->core_if);
+
+       /*
+        * Install the interrupt handler for the common interrupts before
+        * enabling common interrupts in core_init below.
+        */
+
+#if defined(PLATFORM_INTERFACE)
+       devirq = platform_get_irq_byname(_dev, fiq_enable ? "soft" : "usb");
+       if (devirq < 0)
+           devirq = platform_get_irq(_dev, fiq_enable ? 0 : 1);
+#else
+       devirq = _dev->irq;
+#endif
+       DWC_DEBUGPL(DBG_CIL, "registering (common) handler for irq%d\n",
+                   devirq);
+       dev_dbg(&_dev->dev, "Calling request_irq(%d)\n", devirq);
+       retval = request_irq(devirq, dwc_otg_common_irq,
+                             IRQF_SHARED,
+                             "dwc_otg", dwc_otg_device);
+       if (retval) {
+               DWC_ERROR("request of irq%d failed\n", devirq);
+               retval = -EBUSY;
+               goto fail;
+       } else {
+               dwc_otg_device->common_irq_installed = 1;
+       }
+       dwc_otg_device->os_dep.irq_num = devirq;
+       dwc_otg_device->os_dep.fiq_num = -EINVAL;
+       if (fiq_enable) {
+               int devfiq = platform_get_irq_byname(_dev, "usb");
+               if (devfiq < 0)
+                       devfiq = platform_get_irq(_dev, 1);
+               dwc_otg_device->os_dep.fiq_num = devfiq;
+       }
+
+#ifndef IRQF_TRIGGER_LOW
+#if defined(LM_INTERFACE) || defined(PLATFORM_INTERFACE)
+       dev_dbg(&_dev->dev, "Calling set_irq_type\n");
+       set_irq_type(devirq,
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30))
+                     IRQT_LOW
+#else
+                     IRQ_TYPE_LEVEL_LOW
+#endif
+                    );
+#endif
+#endif /*IRQF_TRIGGER_LOW*/
+
+       /*
+        * Initialize the DWC_otg core.
+        */
+       dev_dbg(&_dev->dev, "Calling dwc_otg_core_init\n");
+       dwc_otg_core_init(dwc_otg_device->core_if);
+
+#ifndef DWC_HOST_ONLY
+       /*
+        * Initialize the PCD
+        */
+       dev_dbg(&_dev->dev, "Calling pcd_init\n");
+       retval = pcd_init(_dev);
+       if (retval != 0) {
+               DWC_ERROR("pcd_init failed\n");
+               dwc_otg_device->pcd = NULL;
+               goto fail;
+       }
+#endif
+#ifndef DWC_DEVICE_ONLY
+       /*
+        * Initialize the HCD
+        */
+       dev_dbg(&_dev->dev, "Calling hcd_init\n");
+       retval = hcd_init(_dev);
+       if (retval != 0) {
+               DWC_ERROR("hcd_init failed\n");
+               dwc_otg_device->hcd = NULL;
+               goto fail;
+       }
+#endif
+        /* Recover from drvdata having been overwritten by hcd_init() */
+#ifdef LM_INTERFACE
+       lm_set_drvdata(_dev, dwc_otg_device);
+#elif defined(PLATFORM_INTERFACE)
+       platform_set_drvdata(_dev, dwc_otg_device);
+#elif defined(PCI_INTERFACE)
+       pci_set_drvdata(_dev, dwc_otg_device);
+       dwc_otg_device->os_dep.pcidev = _dev;
+#endif
+
+       /*
+        * Enable the global interrupt after all the interrupt
+        * handlers are installed if there is no ADP support else
+        * perform initial actions required for Internal ADP logic.
+        */
+       if (!dwc_otg_get_param_adp_enable(dwc_otg_device->core_if)) {
+               dev_dbg(&_dev->dev, "Calling enable_global_interrupts\n");
+               dwc_otg_enable_global_interrupts(dwc_otg_device->core_if);
+               dev_dbg(&_dev->dev, "Done\n");
+       } else
+               dwc_otg_adp_start(dwc_otg_device->core_if,
+                                                       dwc_otg_is_host_mode(dwc_otg_device->core_if));
+
+       return 0;
+
+fail:
+       dwc_otg_driver_remove(_dev);
+       return retval;
+}
+
+/**
+ * This structure defines the methods to be called by a bus driver
+ * during the lifecycle of a device on that bus. Both drivers and
+ * devices are registered with a bus driver. The bus driver matches
+ * devices to drivers based on information in the device and driver
+ * structures.
+ *
+ * The probe function is called when the bus driver matches a device
+ * to this driver. The remove function is called when a device is
+ * unregistered with the bus driver.
+ */
+#ifdef LM_INTERFACE
+static struct lm_driver dwc_otg_driver = {
+       .drv = {.name = (char *)dwc_driver_name,},
+       .probe = dwc_otg_driver_probe,
+       .remove = dwc_otg_driver_remove,
+        // 'suspend' and 'resume' absent
+};
+#elif defined(PCI_INTERFACE)
+static const struct pci_device_id pci_ids[] = { {
+                                                PCI_DEVICE(0x16c3, 0xabcd),
+                                                .driver_data =
+                                                (unsigned long)0xdeadbeef,
+                                                }, { /* end: all zeroes */ }
+};
+
+MODULE_DEVICE_TABLE(pci, pci_ids);
+
+/* pci driver glue; this is a "new style" PCI driver module */
+static struct pci_driver dwc_otg_driver = {
+       .name = "dwc_otg",
+       .id_table = pci_ids,
+
+       .probe = dwc_otg_driver_probe,
+       .remove = dwc_otg_driver_remove,
+
+       .driver = {
+                  .name = (char *)dwc_driver_name,
+                  },
+};
+#elif defined(PLATFORM_INTERFACE)
+static struct platform_device_id platform_ids[] = {
+        {
+              .name = "bcm2708_usb",
+              .driver_data = (kernel_ulong_t) 0xdeadbeef,
+        },
+        { /* end: all zeroes */ }
+};
+MODULE_DEVICE_TABLE(platform, platform_ids);
+
+static const struct of_device_id dwc_otg_of_match_table[] = {
+       { .compatible = "brcm,bcm2708-usb", },
+       {},
+};
+MODULE_DEVICE_TABLE(of, dwc_otg_of_match_table);
+
+static struct platform_driver dwc_otg_driver = {
+       .driver = {
+               .name = (char *)dwc_driver_name,
+               .of_match_table = dwc_otg_of_match_table,
+               },
+        .id_table = platform_ids,
+
+       .probe = dwc_otg_driver_probe,
+       .remove = dwc_otg_driver_remove,
+        // no 'shutdown', 'suspend', 'resume', 'suspend_late' or 'resume_early'
+};
+#endif
+
+/**
+ * This function is called when the dwc_otg_driver is installed with the
+ * insmod command. It registers the dwc_otg_driver structure with the
+ * appropriate bus driver. This will cause the dwc_otg_driver_probe function
+ * to be called. In addition, the bus driver will automatically expose
+ * attributes defined for the device and driver in the special sysfs file
+ * system.
+ *
+ * @return
+ */
+static int __init dwc_otg_driver_init(void)
+{
+       int retval = 0;
+       int error;
+        struct device_driver *drv;
+
+       if(fiq_fsm_enable && !fiq_enable) {
+               printk(KERN_WARNING "dwc_otg: fiq_fsm_enable was set without fiq_enable! Correcting.\n");
+               fiq_enable = 1;
+       }
+
+       printk(KERN_INFO "%s: version %s (%s bus)\n", dwc_driver_name,
+              DWC_DRIVER_VERSION,
+#ifdef LM_INTERFACE
+               "logicmodule");
+       retval = lm_driver_register(&dwc_otg_driver);
+        drv = &dwc_otg_driver.drv;
+#elif defined(PCI_INTERFACE)
+               "pci");
+       retval = pci_register_driver(&dwc_otg_driver);
+        drv = &dwc_otg_driver.driver;
+#elif defined(PLATFORM_INTERFACE)
+               "platform");
+       retval = platform_driver_register(&dwc_otg_driver);
+        drv = &dwc_otg_driver.driver;
+#endif
+       if (retval < 0) {
+               printk(KERN_ERR "%s retval=%d\n", __func__, retval);
+               return retval;
+       }
+       printk(KERN_DEBUG "dwc_otg: FIQ %s\n", fiq_enable ? "enabled":"disabled");
+       printk(KERN_DEBUG "dwc_otg: NAK holdoff %s\n", nak_holdoff ? "enabled":"disabled");
+       printk(KERN_DEBUG "dwc_otg: FIQ split-transaction FSM %s\n", fiq_fsm_enable ? "enabled":"disabled");
+
+       error = driver_create_file(drv, &driver_attr_version);
+#ifdef DEBUG
+       error = driver_create_file(drv, &driver_attr_debuglevel);
+#endif
+       return retval;
+}
+
+module_init(dwc_otg_driver_init);
+
+/**
+ * This function is called when the driver is removed from the kernel
+ * with the rmmod command. The driver unregisters itself with its bus
+ * driver.
+ *
+ */
+static void __exit dwc_otg_driver_cleanup(void)
+{
+       printk(KERN_DEBUG "dwc_otg_driver_cleanup()\n");
+
+#ifdef LM_INTERFACE
+       driver_remove_file(&dwc_otg_driver.drv, &driver_attr_debuglevel);
+       driver_remove_file(&dwc_otg_driver.drv, &driver_attr_version);
+       lm_driver_unregister(&dwc_otg_driver);
+#elif defined(PCI_INTERFACE)
+       driver_remove_file(&dwc_otg_driver.driver, &driver_attr_debuglevel);
+       driver_remove_file(&dwc_otg_driver.driver, &driver_attr_version);
+       pci_unregister_driver(&dwc_otg_driver);
+#elif defined(PLATFORM_INTERFACE)
+       driver_remove_file(&dwc_otg_driver.driver, &driver_attr_debuglevel);
+       driver_remove_file(&dwc_otg_driver.driver, &driver_attr_version);
+       platform_driver_unregister(&dwc_otg_driver);
+#endif
+
+       printk(KERN_INFO "%s module removed\n", dwc_driver_name);
+}
+
+module_exit(dwc_otg_driver_cleanup);
+
+MODULE_DESCRIPTION(DWC_DRIVER_DESC);
+MODULE_AUTHOR("Synopsys Inc.");
+MODULE_LICENSE("GPL");
+
+module_param_named(otg_cap, dwc_otg_module_params.otg_cap, int, 0444);
+MODULE_PARM_DESC(otg_cap, "OTG Capabilities 0=HNP&SRP 1=SRP Only 2=None");
+module_param_named(opt, dwc_otg_module_params.opt, int, 0444);
+MODULE_PARM_DESC(opt, "OPT Mode");
+module_param_named(dma_enable, dwc_otg_module_params.dma_enable, int, 0444);
+MODULE_PARM_DESC(dma_enable, "DMA Mode 0=Slave 1=DMA enabled");
+
+module_param_named(dma_desc_enable, dwc_otg_module_params.dma_desc_enable, int,
+                  0444);
+MODULE_PARM_DESC(dma_desc_enable,
+                "DMA Desc Mode 0=Address DMA 1=DMA Descriptor enabled");
+
+module_param_named(dma_burst_size, dwc_otg_module_params.dma_burst_size, int,
+                  0444);
+MODULE_PARM_DESC(dma_burst_size,
+                "DMA Burst Size 1, 4, 8, 16, 32, 64, 128, 256");
+module_param_named(speed, dwc_otg_module_params.speed, int, 0444);
+MODULE_PARM_DESC(speed, "Speed 0=High Speed 1=Full Speed");
+module_param_named(host_support_fs_ls_low_power,
+                  dwc_otg_module_params.host_support_fs_ls_low_power, int,
+                  0444);
+MODULE_PARM_DESC(host_support_fs_ls_low_power,
+                "Support Low Power w/FS or LS 0=Support 1=Don't Support");
+module_param_named(host_ls_low_power_phy_clk,
+                  dwc_otg_module_params.host_ls_low_power_phy_clk, int, 0444);
+MODULE_PARM_DESC(host_ls_low_power_phy_clk,
+                "Low Speed Low Power Clock 0=48Mhz 1=6Mhz");
+module_param_named(enable_dynamic_fifo,
+                  dwc_otg_module_params.enable_dynamic_fifo, int, 0444);
+MODULE_PARM_DESC(enable_dynamic_fifo, "0=cC Setting 1=Allow Dynamic Sizing");
+module_param_named(data_fifo_size, dwc_otg_module_params.data_fifo_size, int,
+                  0444);
+MODULE_PARM_DESC(data_fifo_size,
+                "Total number of words in the data FIFO memory 32-32768");
+module_param_named(dev_rx_fifo_size, dwc_otg_module_params.dev_rx_fifo_size,
+                  int, 0444);
+MODULE_PARM_DESC(dev_rx_fifo_size, "Number of words in the Rx FIFO 16-32768");
+module_param_named(dev_nperio_tx_fifo_size,
+                  dwc_otg_module_params.dev_nperio_tx_fifo_size, int, 0444);
+MODULE_PARM_DESC(dev_nperio_tx_fifo_size,
+                "Number of words in the non-periodic Tx FIFO 16-32768");
+module_param_named(dev_perio_tx_fifo_size_1,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[0], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_1,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_2,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[1], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_2,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_3,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[2], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_3,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_4,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[3], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_4,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_5,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[4], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_5,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_6,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[5], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_6,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_7,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[6], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_7,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_8,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[7], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_8,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_9,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[8], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_9,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_10,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[9], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_10,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_11,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[10], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_11,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_12,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[11], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_12,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_13,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[12], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_13,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_14,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[13], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_14,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(dev_perio_tx_fifo_size_15,
+                  dwc_otg_module_params.dev_perio_tx_fifo_size[14], int, 0444);
+MODULE_PARM_DESC(dev_perio_tx_fifo_size_15,
+                "Number of words in the periodic Tx FIFO 4-768");
+module_param_named(host_rx_fifo_size, dwc_otg_module_params.host_rx_fifo_size,
+                  int, 0444);
+MODULE_PARM_DESC(host_rx_fifo_size, "Number of words in the Rx FIFO 16-32768");
+module_param_named(host_nperio_tx_fifo_size,
+                  dwc_otg_module_params.host_nperio_tx_fifo_size, int, 0444);
+MODULE_PARM_DESC(host_nperio_tx_fifo_size,
+                "Number of words in the non-periodic Tx FIFO 16-32768");
+module_param_named(host_perio_tx_fifo_size,
+                  dwc_otg_module_params.host_perio_tx_fifo_size, int, 0444);
+MODULE_PARM_DESC(host_perio_tx_fifo_size,
+                "Number of words in the host periodic Tx FIFO 16-32768");
+module_param_named(max_transfer_size, dwc_otg_module_params.max_transfer_size,
+                  int, 0444);
+/** @todo Set the max to 512K, modify checks */
+MODULE_PARM_DESC(max_transfer_size,
+                "The maximum transfer size supported in bytes 2047-65535");
+module_param_named(max_packet_count, dwc_otg_module_params.max_packet_count,
+                  int, 0444);
+MODULE_PARM_DESC(max_packet_count,
+                "The maximum number of packets in a transfer 15-511");
+module_param_named(host_channels, dwc_otg_module_params.host_channels, int,
+                  0444);
+MODULE_PARM_DESC(host_channels,
+                "The number of host channel registers to use 1-16");
+module_param_named(dev_endpoints, dwc_otg_module_params.dev_endpoints, int,
+                  0444);
+MODULE_PARM_DESC(dev_endpoints,
+                "The number of endpoints in addition to EP0 available for device mode 1-15");
+module_param_named(phy_type, dwc_otg_module_params.phy_type, int, 0444);
+MODULE_PARM_DESC(phy_type, "0=Reserved 1=UTMI+ 2=ULPI");
+module_param_named(phy_utmi_width, dwc_otg_module_params.phy_utmi_width, int,
+                  0444);
+MODULE_PARM_DESC(phy_utmi_width, "Specifies the UTMI+ Data Width 8 or 16 bits");
+module_param_named(phy_ulpi_ddr, dwc_otg_module_params.phy_ulpi_ddr, int, 0444);
+MODULE_PARM_DESC(phy_ulpi_ddr,
+                "ULPI at double or single data rate 0=Single 1=Double");
+module_param_named(phy_ulpi_ext_vbus, dwc_otg_module_params.phy_ulpi_ext_vbus,
+                  int, 0444);
+MODULE_PARM_DESC(phy_ulpi_ext_vbus,
+                "ULPI PHY using internal or external vbus 0=Internal");
+module_param_named(i2c_enable, dwc_otg_module_params.i2c_enable, int, 0444);
+MODULE_PARM_DESC(i2c_enable, "FS PHY Interface");
+module_param_named(ulpi_fs_ls, dwc_otg_module_params.ulpi_fs_ls, int, 0444);
+MODULE_PARM_DESC(ulpi_fs_ls, "ULPI PHY FS/LS mode only");
+module_param_named(ts_dline, dwc_otg_module_params.ts_dline, int, 0444);
+MODULE_PARM_DESC(ts_dline, "Term select Dline pulsing for all PHYs");
+module_param_named(debug, g_dbg_lvl, int, 0444);
+MODULE_PARM_DESC(debug, "");
+
+module_param_named(en_multiple_tx_fifo,
+                  dwc_otg_module_params.en_multiple_tx_fifo, int, 0444);
+MODULE_PARM_DESC(en_multiple_tx_fifo,
+                "Dedicated Non Periodic Tx FIFOs 0=disabled 1=enabled");
+module_param_named(dev_tx_fifo_size_1,
+                  dwc_otg_module_params.dev_tx_fifo_size[0], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_1, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_2,
+                  dwc_otg_module_params.dev_tx_fifo_size[1], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_2, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_3,
+                  dwc_otg_module_params.dev_tx_fifo_size[2], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_3, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_4,
+                  dwc_otg_module_params.dev_tx_fifo_size[3], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_4, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_5,
+                  dwc_otg_module_params.dev_tx_fifo_size[4], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_5, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_6,
+                  dwc_otg_module_params.dev_tx_fifo_size[5], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_6, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_7,
+                  dwc_otg_module_params.dev_tx_fifo_size[6], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_7, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_8,
+                  dwc_otg_module_params.dev_tx_fifo_size[7], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_8, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_9,
+                  dwc_otg_module_params.dev_tx_fifo_size[8], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_9, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_10,
+                  dwc_otg_module_params.dev_tx_fifo_size[9], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_10, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_11,
+                  dwc_otg_module_params.dev_tx_fifo_size[10], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_11, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_12,
+                  dwc_otg_module_params.dev_tx_fifo_size[11], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_12, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_13,
+                  dwc_otg_module_params.dev_tx_fifo_size[12], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_13, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_14,
+                  dwc_otg_module_params.dev_tx_fifo_size[13], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_14, "Number of words in the Tx FIFO 4-768");
+module_param_named(dev_tx_fifo_size_15,
+                  dwc_otg_module_params.dev_tx_fifo_size[14], int, 0444);
+MODULE_PARM_DESC(dev_tx_fifo_size_15, "Number of words in the Tx FIFO 4-768");
+
+module_param_named(thr_ctl, dwc_otg_module_params.thr_ctl, int, 0444);
+MODULE_PARM_DESC(thr_ctl,
+                "Thresholding enable flag bit 0 - non ISO Tx thr., 1 - ISO Tx thr., 2 - Rx thr.- bit 0=disabled 1=enabled");
+module_param_named(tx_thr_length, dwc_otg_module_params.tx_thr_length, int,
+                  0444);
+MODULE_PARM_DESC(tx_thr_length, "Tx Threshold length in 32 bit DWORDs");
+module_param_named(rx_thr_length, dwc_otg_module_params.rx_thr_length, int,
+                  0444);
+MODULE_PARM_DESC(rx_thr_length, "Rx Threshold length in 32 bit DWORDs");
+
+module_param_named(pti_enable, dwc_otg_module_params.pti_enable, int, 0444);
+module_param_named(mpi_enable, dwc_otg_module_params.mpi_enable, int, 0444);
+module_param_named(lpm_enable, dwc_otg_module_params.lpm_enable, int, 0444);
+MODULE_PARM_DESC(lpm_enable, "LPM Enable 0=LPM Disabled 1=LPM Enabled");
+module_param_named(ic_usb_cap, dwc_otg_module_params.ic_usb_cap, int, 0444);
+MODULE_PARM_DESC(ic_usb_cap,
+                "IC_USB Capability 0=IC_USB Disabled 1=IC_USB Enabled");
+module_param_named(ahb_thr_ratio, dwc_otg_module_params.ahb_thr_ratio, int,
+                  0444);
+MODULE_PARM_DESC(ahb_thr_ratio, "AHB Threshold Ratio");
+module_param_named(power_down, dwc_otg_module_params.power_down, int, 0444);
+MODULE_PARM_DESC(power_down, "Power Down Mode");
+module_param_named(reload_ctl, dwc_otg_module_params.reload_ctl, int, 0444);
+MODULE_PARM_DESC(reload_ctl, "HFIR Reload Control");
+module_param_named(dev_out_nak, dwc_otg_module_params.dev_out_nak, int, 0444);
+MODULE_PARM_DESC(dev_out_nak, "Enable Device OUT NAK");
+module_param_named(cont_on_bna, dwc_otg_module_params.cont_on_bna, int, 0444);
+MODULE_PARM_DESC(cont_on_bna, "Enable Enable Continue on BNA");
+module_param_named(ahb_single, dwc_otg_module_params.ahb_single, int, 0444);
+MODULE_PARM_DESC(ahb_single, "Enable AHB Single Support");
+module_param_named(adp_enable, dwc_otg_module_params.adp_enable, int, 0444);
+MODULE_PARM_DESC(adp_enable, "ADP Enable 0=ADP Disabled 1=ADP Enabled");
+module_param_named(otg_ver, dwc_otg_module_params.otg_ver, int, 0444);
+MODULE_PARM_DESC(otg_ver, "OTG revision supported 0=OTG 1.3 1=OTG 2.0");
+module_param(microframe_schedule, bool, 0444);
+MODULE_PARM_DESC(microframe_schedule, "Enable the microframe scheduler");
+
+module_param(fiq_enable, bool, 0444);
+MODULE_PARM_DESC(fiq_enable, "Enable the FIQ");
+module_param(nak_holdoff, ushort, 0644);
+MODULE_PARM_DESC(nak_holdoff, "Throttle duration for bulk split-transaction endpoints on a NAK. Default 8");
+module_param(fiq_fsm_enable, bool, 0444);
+MODULE_PARM_DESC(fiq_fsm_enable, "Enable the FIQ to perform split transactions as defined by fiq_fsm_mask");
+module_param(fiq_fsm_mask, ushort, 0444);
+MODULE_PARM_DESC(fiq_fsm_mask, "Bitmask of transactions to perform in the FIQ.\n"
+                                       "Bit 0 : Non-periodic split transactions\n"
+                                       "Bit 1 : Periodic split transactions\n"
+                                       "Bit 2 : High-speed multi-transfer isochronous\n"
+                                       "All other bits should be set 0.");
+module_param(int_ep_interval_min, ushort, 0644);
+MODULE_PARM_DESC(int_ep_interval_min, "Clamp high-speed Interrupt endpoints to a minimum polling interval.\n"
+                                       "0..1 = Use endpoint default\n"
+                                       "2..n = Minimum interval n microframes. Use powers of 2.\n");
+
+module_param(cil_force_host, bool, 0644);
+MODULE_PARM_DESC(cil_force_host, "On a connector-ID status change, "
+                                       "force Host Mode regardless of OTG state.");
+
+/** @page "Module Parameters"
+ *
+ * The following parameters may be specified when starting the module.
+ * These parameters define how the DWC_otg controller should be
+ * configured. Parameter values are passed to the CIL initialization
+ * function dwc_otg_cil_init
+ *
+ * Example: <code>modprobe dwc_otg speed=1 otg_cap=1</code>
+ *
+
+ <table>
+ <tr><td>Parameter Name</td><td>Meaning</td></tr>
+
+ <tr>
+ <td>otg_cap</td>
+ <td>Specifies the OTG capabilities. The driver will automatically detect the
+ value for this parameter if none is specified.
+ - 0: HNP and SRP capable (default, if available)
+ - 1: SRP Only capable
+ - 2: No HNP/SRP capable
+ </td></tr>
+
+ <tr>
+ <td>dma_enable</td>
+ <td>Specifies whether to use slave or DMA mode for accessing the data FIFOs.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - 0: Slave
+ - 1: DMA (default, if available)
+ </td></tr>
+
+ <tr>
+ <td>dma_burst_size</td>
+ <td>The DMA Burst size (applicable only for External DMA Mode).
+ - Values: 1, 4, 8 16, 32, 64, 128, 256 (default 32)
+ </td></tr>
+
+ <tr>
+ <td>speed</td>
+ <td>Specifies the maximum speed of operation in host and device mode. The
+ actual speed depends on the speed of the attached device and the value of
+ phy_type.
+ - 0: High Speed (default)
+ - 1: Full Speed
+ </td></tr>
+
+ <tr>
+ <td>host_support_fs_ls_low_power</td>
+ <td>Specifies whether low power mode is supported when attached to a Full
+ Speed or Low Speed device in host mode.
+ - 0: Don't support low power mode (default)
+ - 1: Support low power mode
+ </td></tr>
+
+ <tr>
+ <td>host_ls_low_power_phy_clk</td>
+ <td>Specifies the PHY clock rate in low power mode when connected to a Low
+ Speed device in host mode. This parameter is applicable only if
+ HOST_SUPPORT_FS_LS_LOW_POWER is enabled.
+ - 0: 48 MHz (default)
+ - 1: 6 MHz
+ </td></tr>
+
+ <tr>
+ <td>enable_dynamic_fifo</td>
+ <td> Specifies whether FIFOs may be resized by the driver software.
+ - 0: Use cC FIFO size parameters
+ - 1: Allow dynamic FIFO sizing (default)
+ </td></tr>
+
+ <tr>
+ <td>data_fifo_size</td>
+ <td>Total number of 4-byte words in the data FIFO memory. This memory
+ includes the Rx FIFO, non-periodic Tx FIFO, and periodic Tx FIFOs.
+ - Values: 32 to 32768 (default 8192)
+
+ Note: The total FIFO memory depth in the FPGA configuration is 8192.
+ </td></tr>
+
+ <tr>
+ <td>dev_rx_fifo_size</td>
+ <td>Number of 4-byte words in the Rx FIFO in device mode when dynamic
+ FIFO sizing is enabled.
+ - Values: 16 to 32768 (default 1064)
+ </td></tr>
+
+ <tr>
+ <td>dev_nperio_tx_fifo_size</td>
+ <td>Number of 4-byte words in the non-periodic Tx FIFO in device mode when
+ dynamic FIFO sizing is enabled.
+ - Values: 16 to 32768 (default 1024)
+ </td></tr>
+
+ <tr>
+ <td>dev_perio_tx_fifo_size_n (n = 1 to 15)</td>
+ <td>Number of 4-byte words in each of the periodic Tx FIFOs in device mode
+ when dynamic FIFO sizing is enabled.
+ - Values: 4 to 768 (default 256)
+ </td></tr>
+
+ <tr>
+ <td>host_rx_fifo_size</td>
+ <td>Number of 4-byte words in the Rx FIFO in host mode when dynamic FIFO
+ sizing is enabled.
+ - Values: 16 to 32768 (default 1024)
+ </td></tr>
+
+ <tr>
+ <td>host_nperio_tx_fifo_size</td>
+ <td>Number of 4-byte words in the non-periodic Tx FIFO in host mode when
+ dynamic FIFO sizing is enabled in the core.
+ - Values: 16 to 32768 (default 1024)
+ </td></tr>
+
+ <tr>
+ <td>host_perio_tx_fifo_size</td>
+ <td>Number of 4-byte words in the host periodic Tx FIFO when dynamic FIFO
+ sizing is enabled.
+ - Values: 16 to 32768 (default 1024)
+ </td></tr>
+
+ <tr>
+ <td>max_transfer_size</td>
+ <td>The maximum transfer size supported in bytes.
+ - Values: 2047 to 65,535 (default 65,535)
+ </td></tr>
+
+ <tr>
+ <td>max_packet_count</td>
+ <td>The maximum number of packets in a transfer.
+ - Values: 15 to 511 (default 511)
+ </td></tr>
+
+ <tr>
+ <td>host_channels</td>
+ <td>The number of host channel registers to use.
+ - Values: 1 to 16 (default 12)
+
+ Note: The FPGA configuration supports a maximum of 12 host channels.
+ </td></tr>
+
+ <tr>
+ <td>dev_endpoints</td>
+ <td>The number of endpoints in addition to EP0 available for device mode
+ operations.
+ - Values: 1 to 15 (default 6 IN and OUT)
+
+ Note: The FPGA configuration supports a maximum of 6 IN and OUT endpoints in
+ addition to EP0.
+ </td></tr>
+
+ <tr>
+ <td>phy_type</td>
+ <td>Specifies the type of PHY interface to use. By default, the driver will
+ automatically detect the phy_type.
+ - 0: Full Speed
+ - 1: UTMI+ (default, if available)
+ - 2: ULPI
+ </td></tr>
+
+ <tr>
+ <td>phy_utmi_width</td>
+ <td>Specifies the UTMI+ Data Width. This parameter is applicable for a
+ phy_type of UTMI+. Also, this parameter is applicable only if the
+ OTG_HSPHY_WIDTH cC parameter was set to "8 and 16 bits", meaning that the
+ core has been configured to work at either data path width.
+ - Values: 8 or 16 bits (default 16)
+ </td></tr>
+
+ <tr>
+ <td>phy_ulpi_ddr</td>
+ <td>Specifies whether the ULPI operates at double or single data rate. This
+ parameter is only applicable if phy_type is ULPI.
+ - 0: single data rate ULPI interface with 8 bit wide data bus (default)
+ - 1: double data rate ULPI interface with 4 bit wide data bus
+ </td></tr>
+
+ <tr>
+ <td>i2c_enable</td>
+ <td>Specifies whether to use the I2C interface for full speed PHY. This
+ parameter is only applicable if PHY_TYPE is FS.
+ - 0: Disabled (default)
+ - 1: Enabled
+ </td></tr>
+
+ <tr>
+ <td>ulpi_fs_ls</td>
+ <td>Specifies whether to use ULPI FS/LS mode only.
+ - 0: Disabled (default)
+ - 1: Enabled
+ </td></tr>
+
+ <tr>
+ <td>ts_dline</td>
+ <td>Specifies whether term select D-Line pulsing for all PHYs is enabled.
+ - 0: Disabled (default)
+ - 1: Enabled
+ </td></tr>
+
+ <tr>
+ <td>en_multiple_tx_fifo</td>
+ <td>Specifies whether dedicatedto tx fifos are enabled for non periodic IN EPs.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - 0: Disabled
+ - 1: Enabled (default, if available)
+ </td></tr>
+
+ <tr>
+ <td>dev_tx_fifo_size_n (n = 1 to 15)</td>
+ <td>Number of 4-byte words in each of the Tx FIFOs in device mode
+ when dynamic FIFO sizing is enabled.
+ - Values: 4 to 768 (default 256)
+ </td></tr>
+
+ <tr>
+ <td>tx_thr_length</td>
+ <td>Transmit Threshold length in 32 bit double words
+ - Values: 8 to 128 (default 64)
+ </td></tr>
+
+ <tr>
+ <td>rx_thr_length</td>
+ <td>Receive Threshold length in 32 bit double words
+ - Values: 8 to 128 (default 64)
+ </td></tr>
+
+<tr>
+ <td>thr_ctl</td>
+ <td>Specifies whether to enable Thresholding for Device mode. Bits 0, 1, 2 of
+ this parmater specifies if thresholding is enabled for non-Iso Tx, Iso Tx and
+ Rx transfers accordingly.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - Values: 0 to 7 (default 0)
+ Bit values indicate:
+ - 0: Thresholding disabled
+ - 1: Thresholding enabled
+ </td></tr>
+
+<tr>
+ <td>dma_desc_enable</td>
+ <td>Specifies whether to enable Descriptor DMA mode.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - 0: Descriptor DMA disabled
+ - 1: Descriptor DMA (default, if available)
+ </td></tr>
+
+<tr>
+ <td>mpi_enable</td>
+ <td>Specifies whether to enable MPI enhancement mode.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - 0: MPI disabled (default)
+ - 1: MPI enable
+ </td></tr>
+
+<tr>
+ <td>pti_enable</td>
+ <td>Specifies whether to enable PTI enhancement support.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - 0: PTI disabled (default)
+ - 1: PTI enable
+ </td></tr>
+
+<tr>
+ <td>lpm_enable</td>
+ <td>Specifies whether to enable LPM support.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - 0: LPM disabled
+ - 1: LPM enable (default, if available)
+ </td></tr>
+
+<tr>
+ <td>ic_usb_cap</td>
+ <td>Specifies whether to enable IC_USB capability.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - 0: IC_USB disabled (default, if available)
+ - 1: IC_USB enable
+ </td></tr>
+
+<tr>
+ <td>ahb_thr_ratio</td>
+ <td>Specifies AHB Threshold ratio.
+ - Values: 0 to 3 (default 0)
+ </td></tr>
+
+<tr>
+ <td>power_down</td>
+ <td>Specifies Power Down(Hibernation) Mode.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - 0: Power Down disabled (default)
+ - 2: Power Down enabled
+ </td></tr>
+
+ <tr>
+ <td>reload_ctl</td>
+ <td>Specifies whether dynamic reloading of the HFIR register is allowed during
+ run time. The driver will automatically detect the value for this parameter if
+ none is specified. In case the HFIR value is reloaded when HFIR.RldCtrl == 1'b0
+ the core might misbehave.
+ - 0: Reload Control disabled (default)
+ - 1: Reload Control enabled
+ </td></tr>
+
+ <tr>
+ <td>dev_out_nak</td>
+ <td>Specifies whether  Device OUT NAK enhancement enabled or no.
+ The driver will automatically detect the value for this parameter if
+ none is specified. This parameter is valid only when OTG_EN_DESC_DMA == 1b1.
+ - 0: The core does not set NAK after Bulk OUT transfer complete (default)
+ - 1: The core sets NAK after Bulk OUT transfer complete
+ </td></tr>
+
+ <tr>
+ <td>cont_on_bna</td>
+ <td>Specifies whether Enable Continue on BNA enabled or no.
+ After receiving BNA interrupt the core disables the endpoint,when the
+ endpoint is re-enabled by the application the
+ - 0: Core starts processing from the DOEPDMA descriptor (default)
+ - 1: Core starts processing from the descriptor which received the BNA.
+ This parameter is valid only when OTG_EN_DESC_DMA == 1b1.
+ </td></tr>
+
+ <tr>
+ <td>ahb_single</td>
+ <td>This bit when programmed supports SINGLE transfers for remainder data
+ in a transfer for DMA mode of operation.
+ - 0: The remainder data will be sent using INCR burst size (default)
+ - 1: The remainder data will be sent using SINGLE burst size.
+ </td></tr>
+
+<tr>
+ <td>adp_enable</td>
+ <td>Specifies whether ADP feature is enabled.
+ The driver will automatically detect the value for this parameter if none is
+ specified.
+ - 0: ADP feature disabled (default)
+ - 1: ADP feature enabled
+ </td></tr>
+
+  <tr>
+ <td>otg_ver</td>
+ <td>Specifies whether OTG is performing as USB OTG Revision 2.0 or Revision 1.3
+ USB OTG device.
+ - 0: OTG 2.0 support disabled (default)
+ - 1: OTG 2.0 support enabled
+ </td></tr>
+
+*/
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_driver.h
@@ -0,0 +1,86 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_driver.h $
+ * $Revision: #19 $
+ * $Date: 2010/11/15 $
+ * $Change: 1627671 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+#ifndef __DWC_OTG_DRIVER_H__
+#define __DWC_OTG_DRIVER_H__
+
+/** @file
+ * This file contains the interface to the Linux driver.
+ */
+#include "dwc_otg_os_dep.h"
+#include "dwc_otg_core_if.h"
+
+/* Type declarations */
+struct dwc_otg_pcd;
+struct dwc_otg_hcd;
+
+/**
+ * This structure is a wrapper that encapsulates the driver components used to
+ * manage a single DWC_otg controller.
+ */
+typedef struct dwc_otg_device {
+       /** Structure containing OS-dependent stuff. KEEP THIS STRUCT AT THE
+        * VERY BEGINNING OF THE DEVICE STRUCT. OSes such as FreeBSD and NetBSD
+        * require this. */
+       struct os_dependent os_dep;
+
+       /** Pointer to the core interface structure. */
+       dwc_otg_core_if_t *core_if;
+
+       /** Pointer to the PCD structure. */
+       struct dwc_otg_pcd *pcd;
+
+       /** Pointer to the HCD structure. */
+       struct dwc_otg_hcd *hcd;
+
+       /** Flag to indicate whether the common IRQ handler is installed. */
+       uint8_t common_irq_installed;
+
+} dwc_otg_device_t;
+
+/*We must clear S3C24XX_EINTPEND external interrupt register
+ * because after clearing in this register trigerred IRQ from
+ * H/W core in kernel interrupt can be occured again before OTG
+ * handlers clear all IRQ sources of Core registers because of
+ * timing latencies and Low Level IRQ Type.
+ */
+#ifdef CONFIG_MACH_IPMATE
+#define  S3C2410X_CLEAR_EINTPEND()   \
+do { \
+       __raw_writel(1UL << 11,S3C24XX_EINTPEND); \
+} while (0)
+#else
+#define  S3C2410X_CLEAR_EINTPEND()   do { } while (0)
+#endif
+
+#endif
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c
@@ -0,0 +1,1425 @@
+/*
+ * dwc_otg_fiq_fsm.c - The finite state machine FIQ
+ *
+ * Copyright (c) 2013 Raspberry Pi Foundation
+ *
+ * Author: Jonathan Bell <jonathan@raspberrypi.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Raspberry Pi nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This FIQ implements functionality that performs split transactions on
+ * the dwc_otg hardware without any outside intervention. A split transaction
+ * is "queued" by nominating a specific host channel to perform the entirety
+ * of a split transaction. This FIQ will then perform the microframe-precise
+ * scheduling required in each phase of the transaction until completion.
+ *
+ * The FIQ functionality is glued into the Synopsys driver via the entry point
+ * in the FSM enqueue function, and at the exit point in handling a HC interrupt
+ * for a FSM-enabled channel.
+ *
+ * NB: Large parts of this implementation have architecture-specific code.
+ * For porting this functionality to other ARM machines, the minimum is required:
+ * - An interrupt controller allowing the top-level dwc USB interrupt to be routed
+ *   to the FIQ
+ * - A method of forcing a software generated interrupt from FIQ mode that then
+ *   triggers an IRQ entry (with the dwc USB handler called by this IRQ number)
+ * - Guaranteed interrupt routing such that both the FIQ and SGI occur on the same
+ *   processor core - there is no locking between the FIQ and IRQ (aside from
+ *   local_fiq_disable)
+ *
+ */
+
+#include "dwc_otg_fiq_fsm.h"
+
+
+char buffer[1000*16];
+int wptr;
+void notrace _fiq_print(enum fiq_debug_level dbg_lvl, volatile struct fiq_state *state, char *fmt, ...)
+{
+       enum fiq_debug_level dbg_lvl_req = FIQDBG_ERR;
+       va_list args;
+       char text[17];
+       hfnum_data_t hfnum = { .d32 = FIQ_READ(state->dwc_regs_base + 0x408) };
+
+       if((dbg_lvl & dbg_lvl_req) || dbg_lvl == FIQDBG_ERR)
+       {
+               snprintf(text, 9, " %4d:%1u  ", hfnum.b.frnum/8, hfnum.b.frnum & 7);
+               va_start(args, fmt);
+               vsnprintf(text+8, 9, fmt, args);
+               va_end(args);
+
+               memcpy(buffer + wptr, text, 16);
+               wptr = (wptr + 16) % sizeof(buffer);
+       }
+}
+
+
+#ifdef CONFIG_ARM64
+
+inline void fiq_fsm_spin_lock(fiq_lock_t *lock)
+{
+       spin_lock((spinlock_t *)lock);
+}
+
+inline void fiq_fsm_spin_unlock(fiq_lock_t *lock)
+{
+       spin_unlock((spinlock_t *)lock);
+}
+
+#else
+
+/**
+ * fiq_fsm_spin_lock() - ARMv6+ bare bones spinlock
+ * Must be called with local interrupts and FIQ disabled.
+ */
+#if defined(CONFIG_ARCH_BCM2835) && defined(CONFIG_SMP)
+inline void fiq_fsm_spin_lock(fiq_lock_t *lock)
+{
+       unsigned long tmp;
+       uint32_t newval;
+       fiq_lock_t lockval;
+       /* Nested locking, yay. If we are on the same CPU as the fiq, then the disable
+        * will be sufficient. If we are on a different CPU, then the lock protects us. */
+       prefetchw(&lock->slock);
+       asm volatile (
+       "1:     ldrex   %0, [%3]\n"
+       "       add     %1, %0, %4\n"
+       "       strex   %2, %1, [%3]\n"
+       "       teq     %2, #0\n"
+       "       bne     1b"
+       : "=&r" (lockval), "=&r" (newval), "=&r" (tmp)
+       : "r" (&lock->slock), "I" (1 << 16)
+       : "cc");
+
+       while (lockval.tickets.next != lockval.tickets.owner) {
+               wfe();
+               lockval.tickets.owner = READ_ONCE(lock->tickets.owner);
+       }
+       smp_mb();
+}
+#else
+inline void fiq_fsm_spin_lock(fiq_lock_t *lock) { }
+#endif
+
+/**
+ * fiq_fsm_spin_unlock() - ARMv6+ bare bones spinunlock
+ */
+#if defined(CONFIG_ARCH_BCM2835) && defined(CONFIG_SMP)
+inline void fiq_fsm_spin_unlock(fiq_lock_t *lock)
+{
+       smp_mb();
+       lock->tickets.owner++;
+       dsb_sev();
+}
+#else
+inline void fiq_fsm_spin_unlock(fiq_lock_t *lock) { }
+#endif
+
+#endif
+
+/**
+ * fiq_fsm_restart_channel() - Poke channel enable bit for a split transaction
+ * @channel: channel to re-enable
+ */
+static void fiq_fsm_restart_channel(struct fiq_state *st, int n, int force)
+{
+       hcchar_data_t hcchar = { .d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR) };
+
+       hcchar.b.chen = 0;
+       if (st->channel[n].hcchar_copy.b.eptype & 0x1) {
+               hfnum_data_t hfnum = { .d32 = FIQ_READ(st->dwc_regs_base + HFNUM) };
+               /* Hardware bug workaround: update the ssplit index */
+               if (st->channel[n].hcsplt_copy.b.spltena)
+                       st->channel[n].expected_uframe = (hfnum.b.frnum + 1) & 0x3FFF;
+
+               hcchar.b.oddfrm = (hfnum.b.frnum & 0x1) ? 0     : 1;
+       }
+
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR, hcchar.d32);
+       hcchar.d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR);
+       hcchar.b.chen = 1;
+
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR, hcchar.d32);
+       fiq_print(FIQDBG_INT, st, "HCGO %01d %01d", n, force);
+}
+
+/**
+ * fiq_fsm_setup_csplit() - Prepare a host channel for a CSplit transaction stage
+ * @st: Pointer to the channel's state
+ * @n : channel number
+ *
+ * Change host channel registers to perform a complete-split transaction. Being mindful of the
+ * endpoint direction, set control regs up correctly.
+ */
+static void notrace fiq_fsm_setup_csplit(struct fiq_state *st, int n)
+{
+       hcsplt_data_t hcsplt = { .d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCSPLT) };
+       hctsiz_data_t hctsiz = { .d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCTSIZ) };
+
+       hcsplt.b.compsplt = 1;
+       if (st->channel[n].hcchar_copy.b.epdir == 1) {
+               // If IN, the CSPLIT result contains the data or a hub handshake. hctsiz = maxpacket.
+               hctsiz.b.xfersize = st->channel[n].hctsiz_copy.b.xfersize;
+       } else {
+               // If OUT, the CSPLIT result contains handshake only.
+               hctsiz.b.xfersize = 0;
+       }
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCSPLT, hcsplt.d32);
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCTSIZ, hctsiz.d32);
+       mb();
+}
+
+/**
+ * fiq_fsm_restart_np_pending() - Restart a single non-periodic contended transfer
+ * @st: Pointer to the channel's state
+ * @num_channels: Total number of host channels
+ * @orig_channel: Channel index of completed transfer
+ *
+ * In the case where an IN and OUT transfer are simultaneously scheduled to the
+ * same device/EP, inadequate hub implementations will misbehave. Once the first
+ * transfer is complete, a pending non-periodic split can then be issued.
+ */
+static void notrace fiq_fsm_restart_np_pending(struct fiq_state *st, int num_channels, int orig_channel)
+{
+       int i;
+       int dev_addr = st->channel[orig_channel].hcchar_copy.b.devaddr;
+       int ep_num = st->channel[orig_channel].hcchar_copy.b.epnum;
+       for (i = 0; i < num_channels; i++) {
+               if (st->channel[i].fsm == FIQ_NP_SSPLIT_PENDING &&
+                       st->channel[i].hcchar_copy.b.devaddr == dev_addr &&
+                       st->channel[i].hcchar_copy.b.epnum == ep_num) {
+                       st->channel[i].fsm = FIQ_NP_SSPLIT_STARTED;
+                       fiq_fsm_restart_channel(st, i, 0);
+                       break;
+               }
+       }
+}
+
+static inline int notrace fiq_get_xfer_len(struct fiq_state *st, int n)
+{
+       /* The xfersize register is a bit wonky. For IN transfers, it decrements by the packet size. */
+       hctsiz_data_t hctsiz = { .d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCTSIZ) };
+
+       if (st->channel[n].hcchar_copy.b.epdir == 0) {
+               return st->channel[n].hctsiz_copy.b.xfersize;
+       } else {
+               return st->channel[n].hctsiz_copy.b.xfersize - hctsiz.b.xfersize;
+       }
+
+}
+
+
+/**
+ * fiq_increment_dma_buf() - update DMA address for bounce buffers after a CSPLIT
+ *
+ * Of use only for IN periodic transfers.
+ */
+static int notrace fiq_increment_dma_buf(struct fiq_state *st, int num_channels, int n)
+{
+       hcdma_data_t hcdma;
+       int i = st->channel[n].dma_info.index;
+       int len;
+       struct fiq_dma_blob *blob = (struct fiq_dma_blob *) st->dma_base;
+
+       len = fiq_get_xfer_len(st, n);
+       fiq_print(FIQDBG_INT, st, "LEN: %03d", len);
+       st->channel[n].dma_info.slot_len[i] = len;
+       i++;
+       if (i > 6)
+               BUG();
+
+       hcdma.d32 = (dma_addr_t) &blob->channel[n].index[i].buf[0];
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HC_DMA, hcdma.d32);
+       st->channel[n].dma_info.index = i;
+       return 0;
+}
+
+/**
+ * fiq_reload_hctsiz() - for IN transactions, reset HCTSIZ
+ */
+static void notrace fiq_fsm_reload_hctsiz(struct fiq_state *st, int n)
+{
+       hctsiz_data_t hctsiz = { .d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCTSIZ) };
+       hctsiz.b.xfersize = st->channel[n].hctsiz_copy.b.xfersize;
+       hctsiz.b.pktcnt = 1;
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCTSIZ, hctsiz.d32);
+}
+
+/**
+ * fiq_fsm_reload_hcdma() - for OUT transactions, rewind DMA pointer
+ */
+static void notrace fiq_fsm_reload_hcdma(struct fiq_state *st, int n)
+{
+       hcdma_data_t hcdma = st->channel[n].hcdma_copy;
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HC_DMA, hcdma.d32);
+}
+
+/**
+ * fiq_iso_out_advance() - update DMA address and split position bits
+ * for isochronous OUT transactions.
+ *
+ * Returns 1 if this is the last packet queued, 0 otherwise. Split-ALL and
+ * Split-BEGIN states are not handled - this is done when the transaction was queued.
+ *
+ * This function must only be called from the FIQ_ISO_OUT_ACTIVE state.
+ */
+static int notrace fiq_iso_out_advance(struct fiq_state *st, int num_channels, int n)
+{
+       hcsplt_data_t hcsplt;
+       hctsiz_data_t hctsiz;
+       hcdma_data_t hcdma;
+       struct fiq_dma_blob *blob = (struct fiq_dma_blob *) st->dma_base;
+       int last = 0;
+       int i = st->channel[n].dma_info.index;
+
+       fiq_print(FIQDBG_INT, st, "ADV %01d %01d ", n, i);
+       i++;
+       if (i == 4)
+               last = 1;
+       if (st->channel[n].dma_info.slot_len[i+1] == 255)
+               last = 1;
+
+       /* New DMA address - address of bounce buffer referred to in index */
+       hcdma.d32 = (dma_addr_t) blob->channel[n].index[i].buf;
+       //hcdma.d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HC_DMA);
+       //hcdma.d32 += st->channel[n].dma_info.slot_len[i];
+       fiq_print(FIQDBG_INT, st, "LAST: %01d ", last);
+       fiq_print(FIQDBG_INT, st, "LEN: %03d", st->channel[n].dma_info.slot_len[i]);
+       hcsplt.d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCSPLT);
+       hctsiz.d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCTSIZ);
+       hcsplt.b.xactpos = (last) ? ISOC_XACTPOS_END : ISOC_XACTPOS_MID;
+       /* Set up new packet length */
+       hctsiz.b.pktcnt = 1;
+       hctsiz.b.xfersize = st->channel[n].dma_info.slot_len[i];
+       fiq_print(FIQDBG_INT, st, "%08x", hctsiz.d32);
+
+       st->channel[n].dma_info.index++;
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCSPLT, hcsplt.d32);
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCTSIZ, hctsiz.d32);
+       FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HC_DMA, hcdma.d32);
+       return last;
+}
+
+/**
+ * fiq_fsm_tt_next_isoc() - queue next pending isochronous out start-split on a TT
+ *
+ * Despite the limitations of the DWC core, we can force a microframe pipeline of
+ * isochronous OUT start-split transactions while waiting for a corresponding other-type
+ * of endpoint to finish its CSPLITs. TTs have big periodic buffers therefore it
+ * is very unlikely that filling the start-split FIFO will cause data loss.
+ * This allows much better interleaving of transactions in an order-independent way-
+ * there is no requirement to prioritise isochronous, just a state-space search has
+ * to be performed on each periodic start-split complete interrupt.
+ */
+static int notrace fiq_fsm_tt_next_isoc(struct fiq_state *st, int num_channels, int n)
+{
+       int hub_addr = st->channel[n].hub_addr;
+       int port_addr = st->channel[n].port_addr;
+       int i, poked = 0;
+       for (i = 0; i < num_channels; i++) {
+               if (i == n || st->channel[i].fsm == FIQ_PASSTHROUGH)
+                       continue;
+               if (st->channel[i].hub_addr == hub_addr &&
+                       st->channel[i].port_addr == port_addr) {
+                       switch (st->channel[i].fsm) {
+                       case FIQ_PER_ISO_OUT_PENDING:
+                               if (st->channel[i].nrpackets == 1) {
+                                       st->channel[i].fsm = FIQ_PER_ISO_OUT_LAST;
+                               } else {
+                                       st->channel[i].fsm = FIQ_PER_ISO_OUT_ACTIVE;
+                               }
+                               fiq_fsm_restart_channel(st, i, 0);
+                               poked = 1;
+                               break;
+
+                       default:
+                               break;
+                       }
+               }
+               if (poked)
+                       break;
+       }
+       return poked;
+}
+
+/**
+ * fiq_fsm_tt_in_use() - search for host channels using this TT
+ * @n: Channel to use as reference
+ *
+ */
+int notrace noinline fiq_fsm_tt_in_use(struct fiq_state *st, int num_channels, int n)
+{
+       int hub_addr = st->channel[n].hub_addr;
+       int port_addr = st->channel[n].port_addr;
+       int i, in_use = 0;
+       for (i = 0; i < num_channels; i++) {
+               if (i == n || st->channel[i].fsm == FIQ_PASSTHROUGH)
+                       continue;
+               switch (st->channel[i].fsm) {
+               /* TT is reserved for channels that are in the middle of a periodic
+                * split transaction.
+                */
+               case FIQ_PER_SSPLIT_STARTED:
+               case FIQ_PER_CSPLIT_WAIT:
+               case FIQ_PER_CSPLIT_NYET1:
+               //case FIQ_PER_CSPLIT_POLL:
+               case FIQ_PER_ISO_OUT_ACTIVE:
+               case FIQ_PER_ISO_OUT_LAST:
+                       if (st->channel[i].hub_addr == hub_addr &&
+                               st->channel[i].port_addr == port_addr) {
+                               in_use = 1;
+                       }
+                       break;
+               default:
+                       break;
+               }
+               if (in_use)
+                       break;
+       }
+       return in_use;
+}
+
+/**
+ * fiq_fsm_more_csplits() - determine whether additional CSPLITs need
+ *                     to be issued for this IN transaction.
+ *
+ * We cannot tell the inbound PID of a data packet due to hardware limitations.
+ * we need to make an educated guess as to whether we need to queue another CSPLIT
+ * or not. A no-brainer is when we have received enough data to fill the endpoint
+ * size, but for endpoints that give variable-length data then we have to resort
+ * to heuristics.
+ *
+ * We also return whether this is the last CSPLIT to be queued, again based on
+ * heuristics. This is to allow a 1-uframe overlap of periodic split transactions.
+ * Note: requires at least 1 CSPLIT to have been performed prior to being called.
+ */
+
+/*
+ * We need some way of guaranteeing if a returned periodic packet of size X
+ * has a DATA0 PID.
+ * The heuristic value of 144 bytes assumes that the received data has maximal
+ * bit-stuffing and the clock frequency of the transmitting device is at the lowest
+ * permissible limit. If the transfer length results in a final packet size
+ * 144 < p <= 188, then an erroneous CSPLIT will be issued.
+ * Also used to ensure that an endpoint will nominally only return a single
+ * complete-split worth of data.
+ */
+#define DATA0_PID_HEURISTIC 144
+
+static int notrace noinline fiq_fsm_more_csplits(struct fiq_state *state, int n, int *probably_last)
+{
+
+       int i;
+       int total_len = 0;
+       int more_needed = 1;
+       struct fiq_channel_state *st = &state->channel[n];
+
+       for (i = 0; i < st->dma_info.index; i++) {
+                       total_len += st->dma_info.slot_len[i];
+       }
+
+       *probably_last = 0;
+
+       if (st->hcchar_copy.b.eptype == 0x3) {
+               /*
+                * An interrupt endpoint will take max 2 CSPLITs. if we are receiving data
+                * then this is definitely the last CSPLIT.
+                */
+               *probably_last = 1;
+       } else {
+               /* Isoc IN. This is a bit risky if we are the first transaction:
+                * we may have been held off slightly. */
+               if (i > 1 && st->dma_info.slot_len[st->dma_info.index-1] <= DATA0_PID_HEURISTIC) {
+                       more_needed = 0;
+               }
+               /* If in the next uframe we will receive enough data to fill the endpoint,
+                * then only issue 1 more csplit.
+                */
+               if (st->hctsiz_copy.b.xfersize - total_len <= DATA0_PID_HEURISTIC)
+                       *probably_last = 1;
+       }
+
+       if (total_len >= st->hctsiz_copy.b.xfersize ||
+               i == 6 || total_len == 0)
+               /* Note: due to bit stuffing it is possible to have > 6 CSPLITs for
+                * a single endpoint. Accepting more would completely break our scheduling mechanism though
+                * - in these extreme cases we will pass through a truncated packet.
+                */
+               more_needed = 0;
+
+       return more_needed;
+}
+
+/**
+ * fiq_fsm_too_late() - Test transaction for lateness
+ *
+ * If a SSPLIT for a large IN transaction is issued too late in a frame,
+ * the hub will disable the port to the device and respond with ERR handshakes.
+ * The hub status endpoint will not reflect this change.
+ * Returns 1 if we will issue a SSPLIT that will result in a device babble.
+ */
+int notrace fiq_fsm_too_late(struct fiq_state *st, int n)
+{
+       int uframe;
+       hfnum_data_t hfnum = { .d32 = FIQ_READ(st->dwc_regs_base + HFNUM) };
+       uframe = hfnum.b.frnum & 0x7;
+       if ((uframe < 6) && (st->channel[n].nrpackets + 1 + uframe > 7)) {
+               return 1;
+       } else {
+               return 0;
+       }
+}
+
+
+/**
+ * fiq_fsm_start_next_periodic() - A half-arsed attempt at a microframe pipeline
+ *
+ * Search pending transactions in the start-split pending state and queue them.
+ * Don't queue packets in uframe .5 (comes out in .6) (USB2.0 11.18.4).
+ * Note: we specifically don't do isochronous OUT transactions first because better
+ * use of the TT's start-split fifo can be achieved by pipelining an IN before an OUT.
+ */
+static void notrace noinline fiq_fsm_start_next_periodic(struct fiq_state *st, int num_channels)
+{
+       int n;
+       hfnum_data_t hfnum = { .d32 = FIQ_READ(st->dwc_regs_base + HFNUM) };
+       if ((hfnum.b.frnum & 0x7) == 5)
+               return;
+       for (n = 0; n < num_channels; n++) {
+               if (st->channel[n].fsm == FIQ_PER_SSPLIT_QUEUED) {
+                       /* Check to see if any other transactions are using this TT */
+                       if(!fiq_fsm_tt_in_use(st, num_channels, n)) {
+                               if (!fiq_fsm_too_late(st, n)) {
+                                       st->channel[n].fsm = FIQ_PER_SSPLIT_STARTED;
+                                       fiq_print(FIQDBG_INT, st, "NEXTPER ");
+                                       fiq_fsm_restart_channel(st, n, 0);
+                               } else {
+                                       st->channel[n].fsm = FIQ_PER_SPLIT_TIMEOUT;
+                               }
+                               break;
+                       }
+               }
+       }
+       for (n = 0; n < num_channels; n++) {
+               if (st->channel[n].fsm == FIQ_PER_ISO_OUT_PENDING) {
+                       if (!fiq_fsm_tt_in_use(st, num_channels, n)) {
+                               fiq_print(FIQDBG_INT, st, "NEXTISO ");
+                               if (st->channel[n].nrpackets == 1)
+                                       st->channel[n].fsm = FIQ_PER_ISO_OUT_LAST;
+                               else
+                                       st->channel[n].fsm = FIQ_PER_ISO_OUT_ACTIVE;
+                               fiq_fsm_restart_channel(st, n, 0);
+                               break;
+                       }
+               }
+       }
+}
+
+/**
+ * fiq_fsm_update_hs_isoc() - update isochronous frame and transfer data
+ * @state:     Pointer to fiq_state
+ * @n:         Channel transaction is active on
+ * @hcint:     Copy of host channel interrupt register
+ *
+ * Returns 0 if there are no more transactions for this HC to do, 1
+ * otherwise.
+ */
+static int notrace noinline fiq_fsm_update_hs_isoc(struct fiq_state *state, int n, hcint_data_t hcint)
+{
+       struct fiq_channel_state *st = &state->channel[n];
+       int xfer_len = 0, nrpackets = 0;
+       hcdma_data_t hcdma;
+       fiq_print(FIQDBG_INT, state, "HSISO %02d", n);
+
+       xfer_len = fiq_get_xfer_len(state, n);
+       st->hs_isoc_info.iso_desc[st->hs_isoc_info.index].actual_length = xfer_len;
+
+       st->hs_isoc_info.iso_desc[st->hs_isoc_info.index].status = hcint.d32;
+
+       st->hs_isoc_info.index++;
+       if (st->hs_isoc_info.index == st->hs_isoc_info.nrframes) {
+               return 0;
+       }
+
+       /* grab the next DMA address offset from the array */
+       hcdma.d32 = st->hcdma_copy.d32 + st->hs_isoc_info.iso_desc[st->hs_isoc_info.index].offset;
+       FIQ_WRITE(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HC_DMA, hcdma.d32);
+
+       /* We need to set multi_count. This is a bit tricky - has to be set per-transaction as
+        * the core needs to be told to send the correct number. Caution: for IN transfers,
+        * this is always set to the maximum size of the endpoint. */
+       xfer_len = st->hs_isoc_info.iso_desc[st->hs_isoc_info.index].length;
+       /* Integer divide in a FIQ: fun. FIXME: make this not suck */
+       nrpackets = (xfer_len + st->hcchar_copy.b.mps - 1) / st->hcchar_copy.b.mps;
+       if (nrpackets == 0)
+               nrpackets = 1;
+       st->hcchar_copy.b.multicnt = nrpackets;
+       st->hctsiz_copy.b.pktcnt = nrpackets;
+
+       /* Initial PID also needs to be set */
+       if (st->hcchar_copy.b.epdir == 0) {
+               st->hctsiz_copy.b.xfersize = xfer_len;
+               switch (st->hcchar_copy.b.multicnt) {
+               case 1:
+                       st->hctsiz_copy.b.pid = DWC_PID_DATA0;
+                       break;
+               case 2:
+               case 3:
+                       st->hctsiz_copy.b.pid = DWC_PID_MDATA;
+                       break;
+               }
+
+       } else {
+               st->hctsiz_copy.b.xfersize = nrpackets * st->hcchar_copy.b.mps;
+               switch (st->hcchar_copy.b.multicnt) {
+               case 1:
+                       st->hctsiz_copy.b.pid = DWC_PID_DATA0;
+                       break;
+               case 2:
+                       st->hctsiz_copy.b.pid = DWC_PID_DATA1;
+                       break;
+               case 3:
+                       st->hctsiz_copy.b.pid = DWC_PID_DATA2;
+                       break;
+               }
+       }
+       FIQ_WRITE(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCTSIZ, st->hctsiz_copy.d32);
+       FIQ_WRITE(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR, st->hcchar_copy.d32);
+       /* Channel is enabled on hcint handler exit */
+       fiq_print(FIQDBG_INT, state, "HSISOOUT");
+       return 1;
+}
+
+
+/**
+ * fiq_fsm_do_sof() - FSM start-of-frame interrupt handler
+ * @state:     Pointer to the state struct passed from banked FIQ mode registers.
+ * @num_channels:      set according to the DWC hardware configuration
+ *
+ * The SOF handler in FSM mode has two functions
+ * 1. Hold off SOF from causing schedule advancement in IRQ context if there's
+ *    nothing to do
+ * 2. Advance certain FSM states that require either a microframe delay, or a microframe
+ *    of holdoff.
+ *
+ * The second part is architecture-specific to mach-bcm2835 -
+ * a sane interrupt controller would have a mask register for ARM interrupt sources
+ * to be promoted to the nFIQ line, but it doesn't. Instead a single interrupt
+ * number (USB) can be enabled. This means that certain parts of the USB specification
+ * that require "wait a little while, then issue another packet" cannot be fulfilled with
+ * the timing granularity required to achieve optimal throughout. The workaround is to use
+ * the SOF "timer" (125uS) to perform this task.
+ */
+static int notrace noinline fiq_fsm_do_sof(struct fiq_state *state, int num_channels)
+{
+       hfnum_data_t hfnum = { .d32 = FIQ_READ(state->dwc_regs_base + HFNUM) };
+       int n;
+       int kick_irq = 0;
+
+       if ((hfnum.b.frnum & 0x7) == 1) {
+               /* We cannot issue csplits for transactions in the last frame past (n+1).1
+                * Check to see if there are any transactions that are stale.
+                * Boot them out.
+                */
+               for (n = 0; n < num_channels; n++) {
+                       switch (state->channel[n].fsm) {
+                       case FIQ_PER_CSPLIT_WAIT:
+                       case FIQ_PER_CSPLIT_NYET1:
+                       case FIQ_PER_CSPLIT_POLL:
+                       case FIQ_PER_CSPLIT_LAST:
+                               /* Check if we are no longer in the same full-speed frame. */
+                               if (((state->channel[n].expected_uframe & 0x3FFF) & ~0x7) <
+                                               (hfnum.b.frnum & ~0x7))
+                                       state->channel[n].fsm = FIQ_PER_SPLIT_TIMEOUT;
+                               break;
+                       default:
+                               break;
+                       }
+               }
+       }
+
+       for (n = 0; n < num_channels; n++) {
+               switch (state->channel[n].fsm) {
+
+               case FIQ_NP_SSPLIT_RETRY:
+               case FIQ_NP_IN_CSPLIT_RETRY:
+               case FIQ_NP_OUT_CSPLIT_RETRY:
+                       fiq_fsm_restart_channel(state, n, 0);
+                       break;
+
+               case FIQ_HS_ISOC_SLEEPING:
+                       /* Is it time to wake this channel yet? */
+                       if (--state->channel[n].uframe_sleeps == 0) {
+                               state->channel[n].fsm = FIQ_HS_ISOC_TURBO;
+                               fiq_fsm_restart_channel(state, n, 0);
+                       }
+                       break;
+
+               case FIQ_PER_SSPLIT_QUEUED:
+                       if ((hfnum.b.frnum & 0x7) == 5)
+                               break;
+                       if(!fiq_fsm_tt_in_use(state, num_channels, n)) {
+                               if (!fiq_fsm_too_late(state, n)) {
+                                       fiq_print(FIQDBG_INT, state, "SOF GO %01d", n);
+                                       fiq_fsm_restart_channel(state, n, 0);
+                                       state->channel[n].fsm = FIQ_PER_SSPLIT_STARTED;
+                               } else {
+                                       /* Transaction cannot be started without risking a device babble error */
+                                       state->channel[n].fsm = FIQ_PER_SPLIT_TIMEOUT;
+                                       state->haintmsk_saved.b2.chint &= ~(1 << n);
+                                       FIQ_WRITE(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCINTMSK, 0);
+                                       kick_irq |= 1;
+                               }
+                       }
+                       break;
+
+               case FIQ_PER_ISO_OUT_PENDING:
+                       /* Ordinarily, this should be poked after the SSPLIT
+                        * complete interrupt for a competing transfer on the same
+                        * TT. Doesn't happen for aborted transactions though.
+                        */
+                       if ((hfnum.b.frnum & 0x7) >= 5)
+                               break;
+                       if (!fiq_fsm_tt_in_use(state, num_channels, n)) {
+                               /* Hardware bug. SOF can sometimes occur after the channel halt interrupt
+                                * that caused this.
+                                */
+                                       fiq_fsm_restart_channel(state, n, 0);
+                                       fiq_print(FIQDBG_INT, state, "SOF ISOC");
+                                       if (state->channel[n].nrpackets == 1) {
+                                               state->channel[n].fsm = FIQ_PER_ISO_OUT_LAST;
+                                       } else {
+                                               state->channel[n].fsm = FIQ_PER_ISO_OUT_ACTIVE;
+                                       }
+                       }
+                       break;
+
+               case FIQ_PER_CSPLIT_WAIT:
+                       /* we are guaranteed to be in this state if and only if the SSPLIT interrupt
+                        * occurred when the bus transaction occurred. The SOF interrupt reversal bug
+                        * will utterly bugger this up though.
+                        */
+                       if (hfnum.b.frnum != state->channel[n].expected_uframe) {
+                               fiq_print(FIQDBG_INT, state, "SOFCS %d ", n);
+                               state->channel[n].fsm = FIQ_PER_CSPLIT_POLL;
+                               fiq_fsm_restart_channel(state, n, 0);
+                               fiq_fsm_start_next_periodic(state, num_channels);
+
+                       }
+                       break;
+
+               case FIQ_PER_SPLIT_TIMEOUT:
+               case FIQ_DEQUEUE_ISSUED:
+                       /* Ugly: we have to force a HCD interrupt.
+                        * Poke the mask for the channel in question.
+                        * We will take a fake SOF because of this, but
+                        * that's OK.
+                        */
+                       state->haintmsk_saved.b2.chint &= ~(1 << n);
+                       FIQ_WRITE(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCINTMSK, 0);
+                       kick_irq |= 1;
+                       break;
+
+               default:
+                       break;
+               }
+       }
+
+       if (state->kick_np_queues ||
+                       dwc_frame_num_le(state->next_sched_frame, hfnum.b.frnum))
+               kick_irq |= 1;
+
+       return !kick_irq;
+}
+
+
+/**
+ * fiq_fsm_do_hcintr() - FSM host channel interrupt handler
+ * @state: Pointer to the FIQ state struct
+ * @num_channels: Number of channels as per hardware config
+ * @n: channel for which HAINT(i) was raised
+ *
+ * An important property is that only the CHHLT interrupt is unmasked. Unfortunately, AHBerr is as well.
+ */
+static int notrace noinline fiq_fsm_do_hcintr(struct fiq_state *state, int num_channels, int n)
+{
+       hcint_data_t hcint;
+       hcintmsk_data_t hcintmsk;
+       hcint_data_t hcint_probe;
+       hcchar_data_t hcchar;
+       int handled = 0;
+       int restart = 0;
+       int last_csplit = 0;
+       int start_next_periodic = 0;
+       struct fiq_channel_state *st = &state->channel[n];
+       hfnum_data_t hfnum;
+
+       hcint.d32 = FIQ_READ(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCINT);
+       hcintmsk.d32 = FIQ_READ(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCINTMSK);
+       hcint_probe.d32 = hcint.d32 & hcintmsk.d32;
+
+       if (st->fsm != FIQ_PASSTHROUGH) {
+               fiq_print(FIQDBG_INT, state, "HC%01d ST%02d", n, st->fsm);
+               fiq_print(FIQDBG_INT, state, "%08x", hcint.d32);
+       }
+
+       switch (st->fsm) {
+
+       case FIQ_PASSTHROUGH:
+       case FIQ_DEQUEUE_ISSUED:
+               /* doesn't belong to us, kick it upstairs */
+               break;
+
+       case FIQ_PASSTHROUGH_ERRORSTATE:
+               /* We are here to emulate the error recovery mechanism of the dwc HCD.
+                * Several interrupts are unmasked if a previous transaction failed - it's
+                * death for the FIQ to attempt to handle them as the channel isn't halted.
+                * Emulate what the HCD does in this situation: mask and continue.
+                * The FSM has no other state setup so this has to be handled out-of-band.
+                */
+               fiq_print(FIQDBG_ERR, state, "ERRST %02d", n);
+               if (hcint_probe.b.nak || hcint_probe.b.ack || hcint_probe.b.datatglerr) {
+                       fiq_print(FIQDBG_ERR, state, "RESET %02d", n);
+                       /* In some random cases we can get a NAK interrupt coincident with a Xacterr
+                        * interrupt, after the device has disappeared.
+                        */
+                       if (!hcint.b.xacterr)
+                               st->nr_errors = 0;
+                       hcintmsk.b.nak = 0;
+                       hcintmsk.b.ack = 0;
+                       hcintmsk.b.datatglerr = 0;
+                       FIQ_WRITE(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCINTMSK, hcintmsk.d32);
+                       return 1;
+               }
+               if (hcint_probe.b.chhltd) {
+                       fiq_print(FIQDBG_ERR, state, "CHHLT %02d", n);
+                       fiq_print(FIQDBG_ERR, state, "%08x", hcint.d32);
+                       return 0;
+               }
+               break;
+
+       /* Non-periodic state groups */
+       case FIQ_NP_SSPLIT_STARTED:
+       case FIQ_NP_SSPLIT_RETRY:
+               /* Got a HCINT for a NP SSPLIT. Expected ACK / NAK / fail */
+               if (hcint.b.ack) {
+                       /* SSPLIT complete. For OUT, the data has been sent. For IN, the LS transaction
+                        * will start shortly. SOF needs to kick the transaction to prevent a NYET flood.
+                        */
+                       if(st->hcchar_copy.b.epdir == 1)
+                               st->fsm = FIQ_NP_IN_CSPLIT_RETRY;
+                       else
+                               st->fsm = FIQ_NP_OUT_CSPLIT_RETRY;
+                       st->nr_errors = 0;
+                       handled = 1;
+                       fiq_fsm_setup_csplit(state, n);
+               } else if (hcint.b.nak) {
+                       // No buffer space in TT. Retry on a uframe boundary.
+                       fiq_fsm_reload_hcdma(state, n);
+                       st->fsm = FIQ_NP_SSPLIT_RETRY;
+                       handled = 1;
+               } else if (hcint.b.xacterr) {
+                       // The only other one we care about is xacterr. This implies HS bus error - retry.
+                       st->nr_errors++;
+                       if(st->hcchar_copy.b.epdir == 0)
+                               fiq_fsm_reload_hcdma(state, n);
+                       st->fsm = FIQ_NP_SSPLIT_RETRY;
+                       if (st->nr_errors >= 3) {
+                               st->fsm = FIQ_NP_SPLIT_HS_ABORTED;
+                       } else {
+                               handled = 1;
+                               restart = 1;
+                       }
+               } else {
+                       st->fsm = FIQ_NP_SPLIT_LS_ABORTED;
+                       handled = 0;
+                       restart = 0;
+               }
+               break;
+
+       case FIQ_NP_IN_CSPLIT_RETRY:
+               /* Received a CSPLIT done interrupt.
+                * Expected Data/NAK/STALL/NYET for IN.
+                */
+               if (hcint.b.xfercomp) {
+                       /* For IN, data is present. */
+                       st->fsm = FIQ_NP_SPLIT_DONE;
+               } else if (hcint.b.nak) {
+                       /* no endpoint data. Punt it upstairs */
+                       st->fsm = FIQ_NP_SPLIT_DONE;
+               } else if (hcint.b.nyet) {
+                       /* CSPLIT NYET - retry on a uframe boundary. */
+                       handled = 1;
+                       st->nr_errors = 0;
+               } else if (hcint.b.datatglerr) {
+                       /* data toggle errors do not set the xfercomp bit. */
+                       st->fsm = FIQ_NP_SPLIT_LS_ABORTED;
+               } else if (hcint.b.xacterr) {
+                       /* HS error. Retry immediate */
+                       st->fsm = FIQ_NP_IN_CSPLIT_RETRY;
+                       st->nr_errors++;
+                       if (st->nr_errors >= 3) {
+                               st->fsm = FIQ_NP_SPLIT_HS_ABORTED;
+                       } else {
+                               handled = 1;
+                               restart = 1;
+                       }
+               } else if (hcint.b.stall || hcint.b.bblerr) {
+                       /* A STALL implies either a LS bus error or a genuine STALL. */
+                       st->fsm = FIQ_NP_SPLIT_LS_ABORTED;
+               } else {
+                       /*  Hardware bug. It's possible in some cases to
+                        *  get a channel halt with nothing else set when
+                        *  the response was a NYET. Treat as local 3-strikes retry.
+                        */
+                       hcint_data_t hcint_test = hcint;
+                       hcint_test.b.chhltd = 0;
+                       if (!hcint_test.d32) {
+                               st->nr_errors++;
+                               if (st->nr_errors >= 3) {
+                                       st->fsm = FIQ_NP_SPLIT_HS_ABORTED;
+                               } else {
+                                       handled = 1;
+                               }
+                       } else {
+                               /* Bail out if something unexpected happened */
+                               st->fsm = FIQ_NP_SPLIT_HS_ABORTED;
+                       }
+               }
+               if (st->fsm != FIQ_NP_IN_CSPLIT_RETRY) {
+                       fiq_fsm_restart_np_pending(state, num_channels, n);
+               }
+               break;
+
+       case FIQ_NP_OUT_CSPLIT_RETRY:
+               /* Received a CSPLIT done interrupt.
+                * Expected ACK/NAK/STALL/NYET/XFERCOMP for OUT.*/
+               if (hcint.b.xfercomp) {
+                       st->fsm = FIQ_NP_SPLIT_DONE;
+               } else if (hcint.b.nak) {
+                       // The HCD will implement the holdoff on frame boundaries.
+                       st->fsm = FIQ_NP_SPLIT_DONE;
+               } else if (hcint.b.nyet) {
+                       // Hub still processing.
+                       st->fsm = FIQ_NP_OUT_CSPLIT_RETRY;
+                       handled = 1;
+                       st->nr_errors = 0;
+                       //restart = 1;
+               } else if (hcint.b.xacterr) {
+                       /* HS error. retry immediate */
+                       st->fsm = FIQ_NP_OUT_CSPLIT_RETRY;
+                       st->nr_errors++;
+                       if (st->nr_errors >= 3) {
+                               st->fsm = FIQ_NP_SPLIT_HS_ABORTED;
+                       } else {
+                               handled = 1;
+                               restart = 1;
+                       }
+               } else if (hcint.b.stall) {
+                       /* LS bus error or genuine stall */
+                       st->fsm = FIQ_NP_SPLIT_LS_ABORTED;
+               } else {
+                       /*
+                        * Hardware bug. It's possible in some cases to get a
+                        * channel halt with nothing else set when the response was a NYET.
+                        * Treat as local 3-strikes retry.
+                        */
+                       hcint_data_t hcint_test = hcint;
+                       hcint_test.b.chhltd = 0;
+                       if (!hcint_test.d32) {
+                               st->nr_errors++;
+                               if (st->nr_errors >= 3) {
+                                       st->fsm = FIQ_NP_SPLIT_HS_ABORTED;
+                               } else {
+                                       handled = 1;
+                               }
+                       } else {
+                               // Something unexpected happened. AHBerror or babble perhaps. Let the IRQ deal with it.
+                               st->fsm = FIQ_NP_SPLIT_HS_ABORTED;
+                       }
+               }
+               if (st->fsm != FIQ_NP_OUT_CSPLIT_RETRY) {
+                       fiq_fsm_restart_np_pending(state, num_channels, n);
+               }
+               break;
+
+       /* Periodic split states (except isoc out) */
+       case FIQ_PER_SSPLIT_STARTED:
+               /* Expect an ACK or failure for SSPLIT */
+               if (hcint.b.ack) {
+                       /*
+                        * SSPLIT transfer complete interrupt - the generation of this interrupt is fraught with bugs.
+                        * For a packet queued in microframe n-3 to appear in n-2, if the channel is enabled near the EOF1
+                        * point for microframe n-3, the packet will not appear on the bus until microframe n.
+                        * Additionally, the generation of the actual interrupt is dodgy. For a packet appearing on the bus
+                        * in microframe n, sometimes the interrupt is generated immediately. Sometimes, it appears in n+1
+                        * coincident with SOF for n+1.
+                        * SOF is also buggy. It can sometimes be raised AFTER the first bus transaction has taken place.
+                        * These appear to be caused by timing/clock crossing bugs within the core itself.
+                        * State machine workaround.
+                        */
+                       hfnum.d32 = FIQ_READ(state->dwc_regs_base + HFNUM);
+                       hcchar.d32 = FIQ_READ(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR);
+                       fiq_fsm_setup_csplit(state, n);
+                       /* Poke the oddfrm bit. If we are equivalent, we received the interrupt at the correct
+                        * time. If not, then we're in the next SOF.
+                        */
+                       if ((hfnum.b.frnum & 0x1) == hcchar.b.oddfrm) {
+                               fiq_print(FIQDBG_INT, state, "CSWAIT %01d", n);
+                               st->expected_uframe = hfnum.b.frnum;
+                               st->fsm = FIQ_PER_CSPLIT_WAIT;
+                       } else {
+                               fiq_print(FIQDBG_INT, state, "CSPOL  %01d", n);
+                               /* For isochronous IN endpoints,
+                                * we need to hold off if we are expecting a lot of data */
+                               if (st->hcchar_copy.b.mps < DATA0_PID_HEURISTIC) {
+                                       start_next_periodic = 1;
+                               }
+                               /* Danger will robinson: we are in a broken state. If our first interrupt after
+                                * this is a NYET, it will be delayed by 1 uframe and result in an unrecoverable
+                                * lag. Unmask the NYET interrupt.
+                                */
+                               st->expected_uframe = (hfnum.b.frnum + 1) & 0x3FFF;
+                               st->fsm = FIQ_PER_CSPLIT_BROKEN_NYET1;
+                               restart = 1;
+                       }
+                       handled = 1;
+               } else if (hcint.b.xacterr) {
+                       /* 3-strikes retry is enabled, we have hit our max nr_errors */
+                       st->fsm = FIQ_PER_SPLIT_HS_ABORTED;
+                       start_next_periodic = 1;
+               } else {
+                       st->fsm = FIQ_PER_SPLIT_HS_ABORTED;
+                       start_next_periodic = 1;
+               }
+               /* We can now queue the next isochronous OUT transaction, if one is pending. */
+               if(fiq_fsm_tt_next_isoc(state, num_channels, n)) {
+                       fiq_print(FIQDBG_INT, state, "NEXTISO ");
+               }
+               break;
+
+       case FIQ_PER_CSPLIT_NYET1:
+               /* First CSPLIT attempt was a NYET. If we get a subsequent NYET,
+                * we are too late and the TT has dropped its CSPLIT fifo.
+                */
+               hfnum.d32 = FIQ_READ(state->dwc_regs_base + HFNUM);
+               hcchar.d32 = FIQ_READ(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR);
+               start_next_periodic = 1;
+               if (hcint.b.nak) {
+                       st->fsm = FIQ_PER_SPLIT_DONE;
+               } else if (hcint.b.xfercomp) {
+                       fiq_increment_dma_buf(state, num_channels, n);
+                       st->fsm = FIQ_PER_CSPLIT_POLL;
+                       st->nr_errors = 0;
+                       if (fiq_fsm_more_csplits(state, n, &last_csplit)) {
+                               handled = 1;
+                               restart = 1;
+                               if (!last_csplit)
+                                       start_next_periodic = 0;
+                       } else {
+                               st->fsm = FIQ_PER_SPLIT_DONE;
+                       }
+               } else if (hcint.b.nyet) {
+                       /* Doh. Data lost. */
+                       st->fsm = FIQ_PER_SPLIT_NYET_ABORTED;
+               } else if (hcint.b.xacterr || hcint.b.stall || hcint.b.bblerr) {
+                       st->fsm = FIQ_PER_SPLIT_LS_ABORTED;
+               } else {
+                       st->fsm = FIQ_PER_SPLIT_HS_ABORTED;
+               }
+               break;
+
+       case FIQ_PER_CSPLIT_BROKEN_NYET1:
+               /*
+                * we got here because our host channel is in the delayed-interrupt
+                * state and we cannot take a NYET interrupt any later than when it
+                * occurred. Disable then re-enable the channel if this happens to force
+                * CSPLITs to occur at the right time.
+                */
+               hfnum.d32 = FIQ_READ(state->dwc_regs_base + HFNUM);
+               hcchar.d32 = FIQ_READ(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR);
+               fiq_print(FIQDBG_INT, state, "BROK: %01d ", n);
+               if (hcint.b.nak) {
+                       st->fsm = FIQ_PER_SPLIT_DONE;
+                       start_next_periodic = 1;
+               } else if (hcint.b.xfercomp) {
+                       fiq_increment_dma_buf(state, num_channels, n);
+                       if (fiq_fsm_more_csplits(state, n, &last_csplit)) {
+                               st->fsm = FIQ_PER_CSPLIT_POLL;
+                               handled = 1;
+                               restart = 1;
+                               start_next_periodic = 1;
+                               /* Reload HCTSIZ for the next transfer */
+                               fiq_fsm_reload_hctsiz(state, n);
+                               if (!last_csplit)
+                                       start_next_periodic = 0;
+                       } else {
+                               st->fsm = FIQ_PER_SPLIT_DONE;
+                       }
+               } else if (hcint.b.nyet) {
+                       st->fsm = FIQ_PER_SPLIT_NYET_ABORTED;
+                       start_next_periodic = 1;
+               } else if (hcint.b.xacterr || hcint.b.stall || hcint.b.bblerr) {
+                       /* Local 3-strikes retry is handled by the core. This is a ERR response.*/
+                       st->fsm = FIQ_PER_SPLIT_LS_ABORTED;
+               } else {
+                       st->fsm = FIQ_PER_SPLIT_HS_ABORTED;
+               }
+               break;
+
+       case FIQ_PER_CSPLIT_POLL:
+               hfnum.d32 = FIQ_READ(state->dwc_regs_base + HFNUM);
+               hcchar.d32 = FIQ_READ(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR);
+               start_next_periodic = 1;
+               if (hcint.b.nak) {
+                       st->fsm = FIQ_PER_SPLIT_DONE;
+               } else if (hcint.b.xfercomp) {
+                       fiq_increment_dma_buf(state, num_channels, n);
+                       if (fiq_fsm_more_csplits(state, n, &last_csplit)) {
+                               handled = 1;
+                               restart = 1;
+                               /* Reload HCTSIZ for the next transfer */
+                               fiq_fsm_reload_hctsiz(state, n);
+                               if (!last_csplit)
+                                       start_next_periodic = 0;
+                       } else {
+                               st->fsm = FIQ_PER_SPLIT_DONE;
+                       }
+               } else if (hcint.b.nyet) {
+                       /* Are we a NYET after the first data packet? */
+                       if (st->nrpackets == 0) {
+                               st->fsm = FIQ_PER_CSPLIT_NYET1;
+                               handled = 1;
+                               restart = 1;
+                       } else {
+                               /* We got a NYET when polling CSPLITs. Can happen
+                                * if our heuristic fails, or if someone disables us
+                                * for any significant length of time.
+                                */
+                               if (st->nr_errors >= 3) {
+                                       st->fsm = FIQ_PER_SPLIT_NYET_ABORTED;
+                               } else {
+                                       st->fsm = FIQ_PER_SPLIT_DONE;
+                               }
+                       }
+               } else if (hcint.b.xacterr || hcint.b.stall || hcint.b.bblerr) {
+                       /* For xacterr, Local 3-strikes retry is handled by the core. This is a ERR response.*/
+                       st->fsm = FIQ_PER_SPLIT_LS_ABORTED;
+               } else {
+                       st->fsm = FIQ_PER_SPLIT_HS_ABORTED;
+               }
+               break;
+
+       case FIQ_HS_ISOC_TURBO:
+               if (fiq_fsm_update_hs_isoc(state, n, hcint)) {
+                       /* more transactions to come */
+                       handled = 1;
+                       fiq_print(FIQDBG_INT, state, "HSISO M ");
+                       /* For strided transfers, put ourselves to sleep */
+                       if (st->hs_isoc_info.stride > 1) {
+                               st->uframe_sleeps = st->hs_isoc_info.stride - 1;
+                               st->fsm = FIQ_HS_ISOC_SLEEPING;
+                       } else {
+                               restart = 1;
+                       }
+               } else {
+                       st->fsm = FIQ_HS_ISOC_DONE;
+                       fiq_print(FIQDBG_INT, state, "HSISO F ");
+               }
+               break;
+
+       case FIQ_HS_ISOC_ABORTED:
+               /* This abort is called by the driver rewriting the state mid-transaction
+                * which allows the dequeue mechanism to work more effectively.
+                */
+               break;
+
+       case FIQ_PER_ISO_OUT_ACTIVE:
+               if (hcint.b.ack) {
+                       if(fiq_iso_out_advance(state, num_channels, n)) {
+                               /* last OUT transfer */
+                               st->fsm = FIQ_PER_ISO_OUT_LAST;
+                               /*
+                                * Assuming the periodic FIFO in the dwc core
+                                * actually does its job properly, we can queue
+                                * the next ssplit now and in theory, the wire
+                                * transactions will be in-order.
+                                */
+                               // No it doesn't. It appears to process requests in host channel order.
+                               //start_next_periodic = 1;
+                       }
+                       handled = 1;
+                       restart = 1;
+               } else {
+                       /*
+                        * Isochronous transactions carry on regardless. Log the error
+                        * and continue.
+                        */
+                       //explode += 1;
+                       st->nr_errors++;
+                       if(fiq_iso_out_advance(state, num_channels, n)) {
+                               st->fsm = FIQ_PER_ISO_OUT_LAST;
+                               //start_next_periodic = 1;
+                       }
+                       handled = 1;
+                       restart = 1;
+               }
+               break;
+
+       case FIQ_PER_ISO_OUT_LAST:
+               if (hcint.b.ack) {
+                       /* All done here */
+                       st->fsm = FIQ_PER_ISO_OUT_DONE;
+               } else {
+                       st->fsm = FIQ_PER_ISO_OUT_DONE;
+                       st->nr_errors++;
+               }
+               start_next_periodic = 1;
+               break;
+
+       case FIQ_PER_SPLIT_TIMEOUT:
+               /* SOF kicked us because we overran. */
+               start_next_periodic = 1;
+               break;
+
+       default:
+               break;
+       }
+
+       if (handled) {
+               FIQ_WRITE(state->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCINT, hcint.d32);
+       } else {
+               /* Copy the regs into the state so the IRQ knows what to do */
+               st->hcint_copy.d32 = hcint.d32;
+       }
+
+       if (restart) {
+               /* Restart always implies handled. */
+               if (restart == 2) {
+                       /* For complete-split INs, the show must go on.
+                        * Force a channel restart */
+                       fiq_fsm_restart_channel(state, n, 1);
+               } else {
+                       fiq_fsm_restart_channel(state, n, 0);
+               }
+       }
+       if (start_next_periodic) {
+               fiq_fsm_start_next_periodic(state, num_channels);
+       }
+       if (st->fsm != FIQ_PASSTHROUGH)
+               fiq_print(FIQDBG_INT, state, "FSMOUT%02d", st->fsm);
+
+       return handled;
+}
+
+
+/**
+ * dwc_otg_fiq_fsm() - Flying State Machine (monster) FIQ
+ * @state:             pointer to state struct passed from the banked FIQ mode registers.
+ * @num_channels:      set according to the DWC hardware configuration
+ * @dma:               pointer to DMA bounce buffers for split transaction slots
+ *
+ * The FSM FIQ performs the low-level tasks that normally would be performed by the microcode
+ * inside an EHCI or similar host controller regarding split transactions. The DWC core
+ * interrupts each and every time a split transaction packet is received or sent successfully.
+ * This results in either an interrupt storm when everything is working "properly", or
+ * the interrupt latency of the system in general breaks time-sensitive periodic split
+ * transactions. Pushing the low-level, but relatively easy state machine work into the FIQ
+ * solves these problems.
+ *
+ * Return: void
+ */
+void notrace dwc_otg_fiq_fsm(struct fiq_state *state, int num_channels)
+{
+       gintsts_data_t gintsts, gintsts_handled;
+       gintmsk_data_t gintmsk;
+       //hfnum_data_t hfnum;
+       haint_data_t haint, haint_handled;
+       haintmsk_data_t haintmsk;
+       int kick_irq = 0;
+
+       gintsts_handled.d32 = 0;
+       haint_handled.d32 = 0;
+
+       fiq_fsm_spin_lock(&state->lock);
+       gintsts.d32 = FIQ_READ(state->dwc_regs_base + GINTSTS);
+       gintmsk.d32 = FIQ_READ(state->dwc_regs_base + GINTMSK);
+       gintsts.d32 &= gintmsk.d32;
+
+       if (gintsts.b.sofintr) {
+               /* For FSM mode, SOF is required to keep the state machine advance for
+                * certain stages of the periodic pipeline. It's death to mask this
+                * interrupt in that case.
+                */
+
+               if (!fiq_fsm_do_sof(state, num_channels)) {
+                       /* Kick IRQ once. Queue advancement means that all pending transactions
+                        * will get serviced when the IRQ finally executes.
+                        */
+                       if (state->gintmsk_saved.b.sofintr == 1)
+                               kick_irq |= 1;
+                       state->gintmsk_saved.b.sofintr = 0;
+               }
+               gintsts_handled.b.sofintr = 1;
+       }
+
+       if (gintsts.b.hcintr) {
+               int i;
+               haint.d32 = FIQ_READ(state->dwc_regs_base + HAINT);
+               haintmsk.d32 = FIQ_READ(state->dwc_regs_base + HAINTMSK);
+               haint.d32 &= haintmsk.d32;
+               haint_handled.d32 = 0;
+               for (i=0; i<num_channels; i++) {
+                       if (haint.b2.chint & (1 << i)) {
+                               if(!fiq_fsm_do_hcintr(state, num_channels, i)) {
+                                       /* HCINT was not handled in FIQ
+                                        * HAINT is level-sensitive, leading to level-sensitive ginststs.b.hcint bit.
+                                        * Mask HAINT(i) but keep top-level hcint unmasked.
+                                        */
+                                       state->haintmsk_saved.b2.chint &= ~(1 << i);
+                               } else {
+                                       /* do_hcintr cleaned up after itself, but clear haint */
+                                       haint_handled.b2.chint |= (1 << i);
+                               }
+                       }
+               }
+
+               if (haint_handled.b2.chint) {
+                       FIQ_WRITE(state->dwc_regs_base + HAINT, haint_handled.d32);
+               }
+
+               if (haintmsk.d32 != (haintmsk.d32 & state->haintmsk_saved.d32)) {
+                       /*
+                        * This is necessary to avoid multiple retriggers of the MPHI in the case
+                        * where interrupts are held off and HCINTs start to pile up.
+                        * Only wake up the IRQ if a new interrupt came in, was not handled and was
+                        * masked.
+                        */
+                       haintmsk.d32 &= state->haintmsk_saved.d32;
+                       FIQ_WRITE(state->dwc_regs_base + HAINTMSK, haintmsk.d32);
+                       kick_irq |= 1;
+               }
+               /* Top-Level interrupt - always handled because it's level-sensitive */
+               gintsts_handled.b.hcintr = 1;
+       }
+
+
+       /* Clear the bits in the saved register that were not handled but were triggered. */
+       state->gintmsk_saved.d32 &= ~(gintsts.d32 & ~gintsts_handled.d32);
+
+       /* FIQ didn't handle something - mask has changed - write new mask */
+       if (gintmsk.d32 != (gintmsk.d32 & state->gintmsk_saved.d32)) {
+               gintmsk.d32 &= state->gintmsk_saved.d32;
+               gintmsk.b.sofintr = 1;
+               FIQ_WRITE(state->dwc_regs_base + GINTMSK, gintmsk.d32);
+//             fiq_print(FIQDBG_INT, state, "KICKGINT");
+//             fiq_print(FIQDBG_INT, state, "%08x", gintmsk.d32);
+//             fiq_print(FIQDBG_INT, state, "%08x", state->gintmsk_saved.d32);
+               kick_irq |= 1;
+       }
+
+       if (gintsts_handled.d32) {
+               /* Only applies to edge-sensitive bits in GINTSTS */
+               FIQ_WRITE(state->dwc_regs_base + GINTSTS, gintsts_handled.d32);
+       }
+
+       /* We got an interrupt, didn't handle it. */
+       if (kick_irq) {
+               state->mphi_int_count++;
+               if (state->mphi_regs.swirq_set) {
+                       FIQ_WRITE(state->mphi_regs.swirq_set, 1);
+               } else {
+                       FIQ_WRITE(state->mphi_regs.outdda, state->dummy_send_dma);
+                       FIQ_WRITE(state->mphi_regs.outddb, (1<<29));
+               }
+
+       }
+       state->fiq_done++;
+       mb();
+       fiq_fsm_spin_unlock(&state->lock);
+}
+
+
+/**
+ * dwc_otg_fiq_nop() - FIQ "lite"
+ * @state:     pointer to state struct passed from the banked FIQ mode registers.
+ *
+ * The "nop" handler does not intervene on any interrupts other than SOF.
+ * It is limited in scope to deciding at each SOF if the IRQ SOF handler (which deals
+ * with non-periodic/periodic queues) needs to be kicked.
+ *
+ * This is done to hold off the SOF interrupt, which occurs at a rate of 8000 per second.
+ *
+ * Return: void
+ */
+void notrace dwc_otg_fiq_nop(struct fiq_state *state)
+{
+       gintsts_data_t gintsts, gintsts_handled;
+       gintmsk_data_t gintmsk;
+       hfnum_data_t hfnum;
+
+       fiq_fsm_spin_lock(&state->lock);
+       hfnum.d32 = FIQ_READ(state->dwc_regs_base + HFNUM);
+       gintsts.d32 = FIQ_READ(state->dwc_regs_base + GINTSTS);
+       gintmsk.d32 = FIQ_READ(state->dwc_regs_base + GINTMSK);
+       gintsts.d32 &= gintmsk.d32;
+       gintsts_handled.d32 = 0;
+
+       if (gintsts.b.sofintr) {
+               if (!state->kick_np_queues &&
+                               dwc_frame_num_gt(state->next_sched_frame, hfnum.b.frnum)) {
+                       /* SOF handled, no work to do, just ACK interrupt */
+                       gintsts_handled.b.sofintr = 1;
+               } else {
+                       /* Kick IRQ */
+                       state->gintmsk_saved.b.sofintr = 0;
+               }
+       }
+
+       /* Reset handled interrupts */
+       if(gintsts_handled.d32) {
+               FIQ_WRITE(state->dwc_regs_base + GINTSTS, gintsts_handled.d32);
+       }
+
+       /* Clear the bits in the saved register that were not handled but were triggered. */
+       state->gintmsk_saved.d32 &= ~(gintsts.d32 & ~gintsts_handled.d32);
+
+       /* We got an interrupt, didn't handle it and want to mask it */
+       if (~(state->gintmsk_saved.d32)) {
+               state->mphi_int_count++;
+               gintmsk.d32 &= state->gintmsk_saved.d32;
+               FIQ_WRITE(state->dwc_regs_base + GINTMSK, gintmsk.d32);
+               if (state->mphi_regs.swirq_set) {
+                       FIQ_WRITE(state->mphi_regs.swirq_set, 1);
+               } else {
+                       /* Force a clear before another dummy send */
+                       FIQ_WRITE(state->mphi_regs.intstat, (1<<29));
+                       FIQ_WRITE(state->mphi_regs.outdda, state->dummy_send_dma);
+                       FIQ_WRITE(state->mphi_regs.outddb, (1<<29));
+               }
+       }
+       state->fiq_done++;
+       mb();
+       fiq_fsm_spin_unlock(&state->lock);
+}
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h
@@ -0,0 +1,399 @@
+/*
+ * dwc_otg_fiq_fsm.h - Finite state machine FIQ header definitions
+ *
+ * Copyright (c) 2013 Raspberry Pi Foundation
+ *
+ * Author: Jonathan Bell <jonathan@raspberrypi.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Raspberry Pi nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This FIQ implements functionality that performs split transactions on
+ * the dwc_otg hardware without any outside intervention. A split transaction
+ * is "queued" by nominating a specific host channel to perform the entirety
+ * of a split transaction. This FIQ will then perform the microframe-precise
+ * scheduling required in each phase of the transaction until completion.
+ *
+ * The FIQ functionality has been surgically implanted into the Synopsys
+ * vendor-provided driver.
+ *
+ */
+
+#ifndef DWC_OTG_FIQ_FSM_H_
+#define DWC_OTG_FIQ_FSM_H_
+
+#include "dwc_otg_regs.h"
+#include "dwc_otg_cil.h"
+#include "dwc_otg_hcd.h"
+#include <linux/kernel.h>
+#include <linux/irqflags.h>
+#include <linux/string.h>
+#include <asm/barrier.h>
+
+#if 0
+#define FLAME_ON(x)                                    \
+do {                                                   \
+       int gpioreg;                                    \
+                                                       \
+       gpioreg = readl(__io_address(0x20200000+0x8));  \
+       gpioreg &= ~(7 << (x-20)*3);                    \
+       gpioreg |= 0x1 << (x-20)*3;                     \
+       writel(gpioreg, __io_address(0x20200000+0x8));  \
+                                                       \
+       writel(1<<x, __io_address(0x20200000+(0x1C)));  \
+} while (0)
+
+#define FLAME_OFF(x)                                   \
+do {                                                   \
+       writel(1<<x, __io_address(0x20200000+(0x28)));  \
+} while (0)
+#else
+#define FLAME_ON(x) do { } while (0)
+#define FLAME_OFF(X) do { } while (0)
+#endif
+
+/* This is a quick-and-dirty arch-specific register read/write. We know that
+ * writes to a peripheral on BCM2835 will always arrive in-order, also that
+ * reads and writes are executed in-order therefore the need for memory barriers
+ * is obviated if we're only talking to USB.
+ */
+#define FIQ_WRITE(_addr_,_data_) (*(volatile unsigned int *) (_addr_) = (_data_))
+#define FIQ_READ(_addr_) (*(volatile unsigned int *) (_addr_))
+
+/* FIQ-ified register definitions. Offsets are from dwc_regs_base. */
+#define GINTSTS                0x014
+#define GINTMSK                0x018
+/* Debug register. Poll the top of the received packets FIFO. */
+#define GRXSTSR                0x01C
+#define HFNUM          0x408
+#define HAINT          0x414
+#define HAINTMSK       0x418
+#define HPRT0          0x440
+
+/* HC_regs start from an offset of 0x500 */
+#define HC_START       0x500
+#define HC_OFFSET      0x020
+
+#define HC_DMA         0x14
+
+#define HCCHAR         0x00
+#define HCSPLT         0x04
+#define HCINT          0x08
+#define HCINTMSK       0x0C
+#define HCTSIZ         0x10
+
+#define ISOC_XACTPOS_ALL       0b11
+#define ISOC_XACTPOS_BEGIN     0b10
+#define ISOC_XACTPOS_MID       0b00
+#define ISOC_XACTPOS_END       0b01
+
+#define DWC_PID_DATA2  0b01
+#define DWC_PID_MDATA  0b11
+#define DWC_PID_DATA1  0b10
+#define DWC_PID_DATA0  0b00
+
+typedef struct {
+       volatile void* base;
+       volatile void* ctrl;
+       volatile void* outdda;
+       volatile void* outddb;
+       volatile void* intstat;
+       volatile void* swirq_set;
+       volatile void* swirq_clr;
+} mphi_regs_t;
+
+enum fiq_debug_level {
+       FIQDBG_SCHED = (1 << 0),
+       FIQDBG_INT   = (1 << 1),
+       FIQDBG_ERR   = (1 << 2),
+       FIQDBG_PORTHUB = (1 << 3),
+};
+
+#ifdef CONFIG_ARM64
+
+typedef spinlock_t fiq_lock_t;
+
+#else
+
+typedef struct {
+       union {
+               uint32_t slock;
+               struct _tickets {
+                       uint16_t owner;
+                       uint16_t next;
+               } tickets;
+       };
+} fiq_lock_t;
+
+#endif
+
+struct fiq_state;
+
+extern void _fiq_print (enum fiq_debug_level dbg_lvl, volatile struct fiq_state *state, char *fmt, ...);
+#if 0
+#define fiq_print _fiq_print
+#else
+#define fiq_print(x, y, ...)
+#endif
+
+extern bool fiq_enable, fiq_fsm_enable;
+extern ushort nak_holdoff;
+
+/**
+ * enum fiq_fsm_state - The FIQ FSM states.
+ *
+ * This is the "core" of the FIQ FSM. Broadly, the FSM states follow the
+ * USB2.0 specification for host responses to various transaction states.
+ * There are modifications to this host state machine because of a variety of
+ * quirks and limitations in the dwc_otg hardware.
+ *
+ * The fsm state is also used to communicate back to the driver on completion of
+ * a split transaction. The end states are used in conjunction with the interrupts
+ * raised by the final transaction.
+ */
+enum fiq_fsm_state {
+       /* FIQ isn't enabled for this host channel */
+       FIQ_PASSTHROUGH = 0,
+       /* For the first interrupt received for this channel,
+        * the FIQ has to ack any interrupts indicating success. */
+       FIQ_PASSTHROUGH_ERRORSTATE = 31,
+       /* Nonperiodic state groups */
+       FIQ_NP_SSPLIT_STARTED = 1,
+       FIQ_NP_SSPLIT_RETRY = 2,
+       /* TT contention - working around hub bugs */
+       FIQ_NP_SSPLIT_PENDING = 33,
+       FIQ_NP_OUT_CSPLIT_RETRY = 3,
+       FIQ_NP_IN_CSPLIT_RETRY = 4,
+       FIQ_NP_SPLIT_DONE = 5,
+       FIQ_NP_SPLIT_LS_ABORTED = 6,
+       /* This differentiates a HS transaction error from a LS one
+        * (handling the hub state is different) */
+       FIQ_NP_SPLIT_HS_ABORTED = 7,
+
+       /* Periodic state groups */
+       /* Periodic transactions are either started directly by the IRQ handler
+        * or deferred if the TT is already in use.
+        */
+       FIQ_PER_SSPLIT_QUEUED = 8,
+       FIQ_PER_SSPLIT_STARTED = 9,
+       FIQ_PER_SSPLIT_LAST = 10,
+
+
+       FIQ_PER_ISO_OUT_PENDING = 11,
+       FIQ_PER_ISO_OUT_ACTIVE = 12,
+       FIQ_PER_ISO_OUT_LAST = 13,
+       FIQ_PER_ISO_OUT_DONE = 27,
+
+       FIQ_PER_CSPLIT_WAIT = 14,
+       FIQ_PER_CSPLIT_NYET1 = 15,
+       FIQ_PER_CSPLIT_BROKEN_NYET1 = 28,
+       FIQ_PER_CSPLIT_NYET_FAFF = 29,
+       /* For multiple CSPLITs (large isoc IN, or delayed interrupt) */
+       FIQ_PER_CSPLIT_POLL = 16,
+       /* The last CSPLIT for a transaction has been issued, differentiates
+        * for the state machine to queue the next packet.
+        */
+       FIQ_PER_CSPLIT_LAST = 17,
+
+       FIQ_PER_SPLIT_DONE = 18,
+       FIQ_PER_SPLIT_LS_ABORTED = 19,
+       FIQ_PER_SPLIT_HS_ABORTED = 20,
+       FIQ_PER_SPLIT_NYET_ABORTED = 21,
+       /* Frame rollover has occurred without the transaction finishing. */
+       FIQ_PER_SPLIT_TIMEOUT = 22,
+
+       /* FIQ-accelerated HS Isochronous state groups */
+       FIQ_HS_ISOC_TURBO = 23,
+       /* For interval > 1, SOF wakes up the isochronous FSM */
+       FIQ_HS_ISOC_SLEEPING = 24,
+       FIQ_HS_ISOC_DONE = 25,
+       FIQ_HS_ISOC_ABORTED = 26,
+       FIQ_DEQUEUE_ISSUED = 30,
+       FIQ_TEST = 32,
+};
+
+struct fiq_stack {
+       int magic1;
+       uint8_t stack[2048];
+       int magic2;
+};
+
+
+/**
+ * struct fiq_dma_info - DMA bounce buffer utilisation information (per-channel)
+ * @index:     Number of slots reported used for IN transactions / number of slots
+ *                     transmitted for an OUT transaction
+ * @slot_len[6]: Number of actual transfer bytes in each slot (255 if unused)
+ *
+ * Split transaction transfers can have variable length depending on other bus
+ * traffic. The OTG core DMA engine requires 4-byte aligned addresses therefore
+ * each transaction needs a guaranteed aligned address. A maximum of 6 split transfers
+ * can happen per-frame.
+ */
+struct fiq_dma_info {
+       u8 index;
+       u8 slot_len[6];
+};
+
+struct __attribute__((packed)) fiq_split_dma_slot {
+       u8 buf[188];
+};
+
+struct fiq_dma_channel {
+       struct __attribute__((packed)) fiq_split_dma_slot index[6];
+};
+
+struct fiq_dma_blob {
+       struct __attribute__((packed)) fiq_dma_channel channel[0];
+};
+
+/**
+ * struct fiq_hs_isoc_info - USB2.0 isochronous data
+ * @iso_frame: Pointer to the array of OTG URB iso_frame_descs.
+ * @nrframes:  Total length of iso_frame_desc array
+ * @index:     Current index (FIQ-maintained)
+ * @stride:    Interval in uframes between HS isoc transactions
+ */
+struct fiq_hs_isoc_info {
+       struct dwc_otg_hcd_iso_packet_desc *iso_desc;
+       unsigned int nrframes;
+       unsigned int index;
+       unsigned int stride;
+};
+
+/**
+ * struct fiq_channel_state - FIQ state machine storage
+ * @fsm:       Current state of the channel as understood by the FIQ
+ * @nr_errors: Number of transaction errors on this split-transaction
+ * @hub_addr:   SSPLIT/CSPLIT destination hub
+ * @port_addr:  SSPLIT/CSPLIT destination port - always 1 if single TT hub
+ * @nrpackets:  For isoc OUT, the number of split-OUT packets to transmit. For
+ *             split-IN, number of CSPLIT data packets that were received.
+ * @hcchar_copy:
+ * @hcsplt_copy:
+ * @hcintmsk_copy:
+ * @hctsiz_copy:       Copies of the host channel registers.
+ *                     For use as scratch, or for returning state.
+ *
+ * The fiq_channel_state is state storage between interrupts for a host channel. The
+ * FSM state is stored here. Members of this structure must only be set up by the
+ * driver prior to enabling the FIQ for this host channel, and not touched until the FIQ
+ * has updated the state to either a COMPLETE state group or ABORT state group.
+ */
+
+struct fiq_channel_state {
+       enum fiq_fsm_state fsm;
+       unsigned int nr_errors;
+       unsigned int hub_addr;
+       unsigned int port_addr;
+       /* Hardware bug workaround: sometimes channel halt interrupts are
+        * delayed until the next SOF. Keep track of when we expected to get interrupted. */
+       unsigned int expected_uframe;
+       /* number of uframes remaining (for interval > 1 HS isoc transfers) before next transfer */
+       unsigned int uframe_sleeps;
+       /* in/out for communicating number of dma buffers used, or number of ISOC to do */
+       unsigned int nrpackets;
+       struct fiq_dma_info dma_info;
+       struct fiq_hs_isoc_info hs_isoc_info;
+       /* Copies of HC registers - in/out communication from/to IRQ handler
+        * and for ease of channel setup. A bit of mungeing is performed - for
+        * example the hctsiz.b.maxp is _always_ the max packet size of the endpoint.
+        */
+       hcchar_data_t hcchar_copy;
+       hcsplt_data_t hcsplt_copy;
+       hcint_data_t hcint_copy;
+       hcintmsk_data_t hcintmsk_copy;
+       hctsiz_data_t hctsiz_copy;
+       hcdma_data_t hcdma_copy;
+};
+
+/**
+ * struct fiq_state - top-level FIQ state machine storage
+ * @mphi_regs:         virtual address of the MPHI peripheral register file
+ * @dwc_regs_base:     virtual address of the base of the DWC core register file
+ * @dma_base:          physical address for the base of the DMA bounce buffers
+ * @dummy_send:                Scratch area for sending a fake message to the MPHI peripheral
+ * @gintmsk_saved:     Top-level mask of interrupts that the FIQ has not handled.
+ *                     Used for determining which interrupts fired to set off the IRQ handler.
+ * @haintmsk_saved:    Mask of interrupts from host channels that the FIQ did not handle internally.
+ * @np_count:          Non-periodic transactions in the active queue
+ * @np_sent:           Count of non-periodic transactions that have completed
+ * @next_sched_frame:  For periodic transactions handled by the driver's SOF-driven queuing mechanism,
+ *                     this is the next frame on which a SOF interrupt is required. Used to hold off
+ *                     passing SOF through to the driver until necessary.
+ * @channel[n]:                Per-channel FIQ state. Allocated during init depending on the number of host
+ *                     channels configured into the core logic.
+ *
+ * This is passed as the first argument to the dwc_otg_fiq_fsm top-level FIQ handler from the asm stub.
+ * It contains top-level state information.
+ */
+struct fiq_state {
+       fiq_lock_t lock;
+       mphi_regs_t mphi_regs;
+       void *dwc_regs_base;
+       dma_addr_t dma_base;
+       struct fiq_dma_blob *fiq_dmab;
+       void *dummy_send;
+       dma_addr_t dummy_send_dma;
+       gintmsk_data_t gintmsk_saved;
+       haintmsk_data_t haintmsk_saved;
+       int mphi_int_count;
+       unsigned int fiq_done;
+       unsigned int kick_np_queues;
+       unsigned int next_sched_frame;
+#ifdef FIQ_DEBUG
+       char * buffer;
+       unsigned int bufsiz;
+#endif
+       struct fiq_channel_state channel[0];
+};
+
+#ifdef CONFIG_ARM64
+
+#ifdef local_fiq_enable
+#undef local_fiq_enable
+#endif
+
+#ifdef local_fiq_disable
+#undef local_fiq_disable
+#endif
+
+extern void local_fiq_enable(void);
+
+extern void local_fiq_disable(void);
+
+#endif
+
+extern void fiq_fsm_spin_lock(fiq_lock_t *lock);
+
+extern void fiq_fsm_spin_unlock(fiq_lock_t *lock);
+
+extern int fiq_fsm_too_late(struct fiq_state *st, int n);
+
+extern int fiq_fsm_tt_in_use(struct fiq_state *st, int num_channels, int n);
+
+extern void dwc_otg_fiq_fsm(struct fiq_state *state, int num_channels);
+
+extern void dwc_otg_fiq_nop(struct fiq_state *state);
+
+#endif /* DWC_OTG_FIQ_FSM_H_ */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_stub.S
@@ -0,0 +1,80 @@
+/*
+ * dwc_otg_fiq_fsm.S - assembly stub for the FSM FIQ
+ *
+ * Copyright (c) 2013 Raspberry Pi Foundation
+ *
+ * Author: Jonathan Bell <jonathan@raspberrypi.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Raspberry Pi nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include <asm/assembler.h>
+#include <linux/linkage.h>
+
+
+.text
+
+.global _dwc_otg_fiq_stub_end;
+
+/**
+  * _dwc_otg_fiq_stub() - entry copied to the FIQ vector page to allow
+  * a C-style function call with arguments from the FIQ banked registers.
+  * r0 = &hcd->fiq_state
+  * r1 = &hcd->num_channels
+  * r2 = &hcd->dma_buffers
+  * Tramples: r0, r1, r2, r4, fp, ip
+  */
+
+ENTRY(_dwc_otg_fiq_stub)
+       /* Stash unbanked regs - SP will have been set up for us */
+       mov ip, sp;
+       stmdb sp!, {r0-r12, lr};
+#ifdef FIQ_DEBUG
+       // Cycle profiling - read cycle counter at start
+       mrc p15, 0, r5, c15, c12, 1;
+#endif
+       /* r11 = fp, don't trample it */
+       mov r4, fp;
+       /* set EABI frame size */
+       sub fp, ip, #512;
+
+       /* for fiq NOP mode - just need state */
+       mov r0, r8;
+       /* r9 = num_channels */
+       mov r1, r9;
+       /* r10 = struct *dma_bufs */
+//     mov r2, r10;
+
+       /* r4 = &fiq_c_function */
+       blx r4;
+#ifdef FIQ_DEBUG
+       mrc p15, 0, r4, c15, c12, 1;
+       subs r5, r5, r4;
+       // r5 is now the cycle count time for executing the FIQ. Store it somewhere?
+#endif
+       ldmia sp!, {r0-r12, lr};
+       subs pc, lr, #4;
+_dwc_otg_fiq_stub_end:
+END(_dwc_otg_fiq_stub)
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
@@ -0,0 +1,4327 @@
+
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd.c $
+ * $Revision: #104 $
+ * $Date: 2011/10/24 $
+ * $Change: 1871159 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_DEVICE_ONLY
+
+/** @file
+ * This file implements HCD Core. All code in this file is portable and doesn't
+ * use any OS specific functions.
+ * Interface provided by HCD Core is defined in <code><hcd_if.h></code>
+ * header file.
+ */
+
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "dwc_otg_hcd.h"
+#include "dwc_otg_regs.h"
+#include "dwc_otg_fiq_fsm.h"
+
+extern bool microframe_schedule;
+extern uint16_t fiq_fsm_mask, nak_holdoff;
+
+//#define DEBUG_HOST_CHANNELS
+#ifdef DEBUG_HOST_CHANNELS
+static int last_sel_trans_num_per_scheduled = 0;
+static int last_sel_trans_num_nonper_scheduled = 0;
+static int last_sel_trans_num_avail_hc_at_start = 0;
+static int last_sel_trans_num_avail_hc_at_end = 0;
+#endif /* DEBUG_HOST_CHANNELS */
+
+
+dwc_otg_hcd_t *dwc_otg_hcd_alloc_hcd(void)
+{
+       return DWC_ALLOC(sizeof(dwc_otg_hcd_t));
+}
+
+/**
+ * Connection timeout function.  An OTG host is required to display a
+ * message if the device does not connect within 10 seconds.
+ */
+void dwc_otg_hcd_connect_timeout(void *ptr)
+{
+       DWC_DEBUGPL(DBG_HCDV, "%s(%p)\n", __func__, ptr);
+       DWC_PRINTF("Connect Timeout\n");
+       __DWC_ERROR("Device Not Connected/Responding\n");
+}
+
+#if defined(DEBUG)
+static void dump_channel_info(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       if (qh->channel != NULL) {
+               dwc_hc_t *hc = qh->channel;
+               dwc_list_link_t *item;
+               dwc_otg_qh_t *qh_item;
+               int num_channels = hcd->core_if->core_params->host_channels;
+               int i;
+
+               dwc_otg_hc_regs_t *hc_regs;
+               hcchar_data_t hcchar;
+               hcsplt_data_t hcsplt;
+               hctsiz_data_t hctsiz;
+               uint32_t hcdma;
+
+               hc_regs = hcd->core_if->host_if->hc_regs[hc->hc_num];
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+               hcsplt.d32 = DWC_READ_REG32(&hc_regs->hcsplt);
+               hctsiz.d32 = DWC_READ_REG32(&hc_regs->hctsiz);
+               hcdma = DWC_READ_REG32(&hc_regs->hcdma);
+
+               DWC_PRINTF("  Assigned to channel %p:\n", hc);
+               DWC_PRINTF("    hcchar 0x%08x, hcsplt 0x%08x\n", hcchar.d32,
+                          hcsplt.d32);
+               DWC_PRINTF("    hctsiz 0x%08x, hcdma 0x%08x\n", hctsiz.d32,
+                          hcdma);
+               DWC_PRINTF("    dev_addr: %d, ep_num: %d, ep_is_in: %d\n",
+                          hc->dev_addr, hc->ep_num, hc->ep_is_in);
+               DWC_PRINTF("    ep_type: %d\n", hc->ep_type);
+               DWC_PRINTF("    max_packet: %d\n", hc->max_packet);
+               DWC_PRINTF("    data_pid_start: %d\n", hc->data_pid_start);
+               DWC_PRINTF("    xfer_started: %d\n", hc->xfer_started);
+               DWC_PRINTF("    halt_status: %d\n", hc->halt_status);
+               DWC_PRINTF("    xfer_buff: %p\n", hc->xfer_buff);
+               DWC_PRINTF("    xfer_len: %d\n", hc->xfer_len);
+               DWC_PRINTF("    qh: %p\n", hc->qh);
+               DWC_PRINTF("  NP inactive sched:\n");
+               DWC_LIST_FOREACH(item, &hcd->non_periodic_sched_inactive) {
+                       qh_item =
+                           DWC_LIST_ENTRY(item, dwc_otg_qh_t, qh_list_entry);
+                       DWC_PRINTF("    %p\n", qh_item);
+               }
+               DWC_PRINTF("  NP active sched:\n");
+               DWC_LIST_FOREACH(item, &hcd->non_periodic_sched_active) {
+                       qh_item =
+                           DWC_LIST_ENTRY(item, dwc_otg_qh_t, qh_list_entry);
+                       DWC_PRINTF("    %p\n", qh_item);
+               }
+               DWC_PRINTF("  Channels: \n");
+               for (i = 0; i < num_channels; i++) {
+                       dwc_hc_t *hc = hcd->hc_ptr_array[i];
+                       DWC_PRINTF("    %2d: %p\n", i, hc);
+               }
+       }
+}
+#else
+#define dump_channel_info(hcd, qh)
+#endif /* DEBUG */
+
+/**
+ * Work queue function for starting the HCD when A-Cable is connected.
+ * The hcd_start() must be called in a process context.
+ */
+static void hcd_start_func(void *_vp)
+{
+       dwc_otg_hcd_t *hcd = (dwc_otg_hcd_t *) _vp;
+
+       DWC_DEBUGPL(DBG_HCDV, "%s() %p\n", __func__, hcd);
+       if (hcd) {
+               hcd->fops->start(hcd);
+       }
+}
+
+static void del_xfer_timers(dwc_otg_hcd_t * hcd)
+{
+#ifdef DEBUG
+       int i;
+       int num_channels = hcd->core_if->core_params->host_channels;
+       for (i = 0; i < num_channels; i++) {
+               DWC_TIMER_CANCEL(hcd->core_if->hc_xfer_timer[i]);
+       }
+#endif
+}
+
+static void del_timers(dwc_otg_hcd_t * hcd)
+{
+       del_xfer_timers(hcd);
+       DWC_TIMER_CANCEL(hcd->conn_timer);
+}
+
+/**
+ * Processes all the URBs in a single list of QHs. Completes them with
+ * -ESHUTDOWN and frees the QTD.
+ */
+static void kill_urbs_in_qh_list(dwc_otg_hcd_t * hcd, dwc_list_link_t * qh_list)
+{
+       dwc_list_link_t *qh_item, *qh_tmp;
+       dwc_otg_qh_t *qh;
+       dwc_otg_qtd_t *qtd, *qtd_tmp;
+
+       DWC_LIST_FOREACH_SAFE(qh_item, qh_tmp, qh_list) {
+               qh = DWC_LIST_ENTRY(qh_item, dwc_otg_qh_t, qh_list_entry);
+               DWC_CIRCLEQ_FOREACH_SAFE(qtd, qtd_tmp,
+                                        &qh->qtd_list, qtd_list_entry) {
+                       qtd = DWC_CIRCLEQ_FIRST(&qh->qtd_list);
+                       if (qtd->urb != NULL) {
+                               hcd->fops->complete(hcd, qtd->urb->priv,
+                                                   qtd->urb, -DWC_E_SHUTDOWN);
+                               dwc_otg_hcd_qtd_remove_and_free(hcd, qtd, qh);
+                       }
+
+               }
+               if(qh->channel) {
+                       int n = qh->channel->hc_num;
+                       /* Using hcchar.chen == 1 is not a reliable test.
+                        * It is possible that the channel has already halted
+                        * but not yet been through the IRQ handler.
+                        */
+                       if (fiq_fsm_enable && (hcd->fiq_state->channel[qh->channel->hc_num].fsm != FIQ_PASSTHROUGH)) {
+                               qh->channel->halt_status = DWC_OTG_HC_XFER_URB_DEQUEUE;
+                               qh->channel->halt_pending = 1;
+                               if (hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_TURBO ||
+                                       hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING)
+                                       hcd->fiq_state->channel[n].fsm = FIQ_HS_ISOC_ABORTED;
+                       } else {
+                               dwc_otg_hc_halt(hcd->core_if, qh->channel,
+                                               DWC_OTG_HC_XFER_URB_DEQUEUE);
+                       }
+                       qh->channel = NULL;
+               }
+               dwc_otg_hcd_qh_remove(hcd, qh);
+       }
+}
+
+/**
+ * Responds with an error status of ESHUTDOWN to all URBs in the non-periodic
+ * and periodic schedules. The QTD associated with each URB is removed from
+ * the schedule and freed. This function may be called when a disconnect is
+ * detected or when the HCD is being stopped.
+ */
+static void kill_all_urbs(dwc_otg_hcd_t * hcd)
+{
+       kill_urbs_in_qh_list(hcd, &hcd->non_periodic_sched_inactive);
+       kill_urbs_in_qh_list(hcd, &hcd->non_periodic_sched_active);
+       kill_urbs_in_qh_list(hcd, &hcd->periodic_sched_inactive);
+       kill_urbs_in_qh_list(hcd, &hcd->periodic_sched_ready);
+       kill_urbs_in_qh_list(hcd, &hcd->periodic_sched_assigned);
+       kill_urbs_in_qh_list(hcd, &hcd->periodic_sched_queued);
+}
+
+/**
+ * Start the connection timer.  An OTG host is required to display a
+ * message if the device does not connect within 10 seconds.  The
+ * timer is deleted if a port connect interrupt occurs before the
+ * timer expires.
+ */
+static void dwc_otg_hcd_start_connect_timer(dwc_otg_hcd_t * hcd)
+{
+       DWC_TIMER_SCHEDULE(hcd->conn_timer, 10000 /* 10 secs */ );
+}
+
+/**
+ * HCD Callback function for disconnect of the HCD.
+ *
+ * @param p void pointer to the <code>struct usb_hcd</code>
+ */
+static int32_t dwc_otg_hcd_session_start_cb(void *p)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd;
+       DWC_DEBUGPL(DBG_HCDV, "%s(%p)\n", __func__, p);
+       dwc_otg_hcd = p;
+       dwc_otg_hcd_start_connect_timer(dwc_otg_hcd);
+       return 1;
+}
+
+/**
+ * HCD Callback function for starting the HCD when A-Cable is
+ * connected.
+ *
+ * @param p void pointer to the <code>struct usb_hcd</code>
+ */
+static int32_t dwc_otg_hcd_start_cb(void *p)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd = p;
+       dwc_otg_core_if_t *core_if;
+       hprt0_data_t hprt0;
+
+       core_if = dwc_otg_hcd->core_if;
+
+       if (core_if->op_state == B_HOST) {
+               /*
+                * Reset the port.  During a HNP mode switch the reset
+                * needs to occur within 1ms and have a duration of at
+                * least 50ms.
+                */
+               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+               hprt0.b.prtrst = 1;
+               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+       }
+       DWC_WORKQ_SCHEDULE_DELAYED(core_if->wq_otg,
+                                  hcd_start_func, dwc_otg_hcd, 50,
+                                  "start hcd");
+
+       return 1;
+}
+
+/**
+ * HCD Callback function for disconnect of the HCD.
+ *
+ * @param p void pointer to the <code>struct usb_hcd</code>
+ */
+static int32_t dwc_otg_hcd_disconnect_cb(void *p)
+{
+       gintsts_data_t intr;
+       dwc_otg_hcd_t *dwc_otg_hcd = p;
+
+       DWC_SPINLOCK(dwc_otg_hcd->lock);
+       /*
+        * Set status flags for the hub driver.
+        */
+       dwc_otg_hcd->flags.b.port_connect_status_change = 1;
+       dwc_otg_hcd->flags.b.port_connect_status = 0;
+       if(fiq_enable) {
+               local_fiq_disable();
+               fiq_fsm_spin_lock(&dwc_otg_hcd->fiq_state->lock);
+       }
+       /*
+        * Shutdown any transfers in process by clearing the Tx FIFO Empty
+        * interrupt mask and status bits and disabling subsequent host
+        * channel interrupts.
+        */
+       intr.d32 = 0;
+       intr.b.nptxfempty = 1;
+       intr.b.ptxfempty = 1;
+       intr.b.hcintr = 1;
+       DWC_MODIFY_REG32(&dwc_otg_hcd->core_if->core_global_regs->gintmsk,
+                        intr.d32, 0);
+       DWC_MODIFY_REG32(&dwc_otg_hcd->core_if->core_global_regs->gintsts,
+                        intr.d32, 0);
+
+       del_timers(dwc_otg_hcd);
+
+       /*
+        * Turn off the vbus power only if the core has transitioned to device
+        * mode. If still in host mode, need to keep power on to detect a
+        * reconnection.
+        */
+       if (dwc_otg_is_device_mode(dwc_otg_hcd->core_if)) {
+               if (dwc_otg_hcd->core_if->op_state != A_SUSPEND) {
+                       hprt0_data_t hprt0 = {.d32 = 0 };
+                       DWC_PRINTF("Disconnect: PortPower off\n");
+                       hprt0.b.prtpwr = 0;
+                       DWC_WRITE_REG32(dwc_otg_hcd->core_if->host_if->hprt0,
+                                       hprt0.d32);
+               }
+
+               dwc_otg_disable_host_interrupts(dwc_otg_hcd->core_if);
+       }
+
+       /* Respond with an error status to all URBs in the schedule. */
+       kill_all_urbs(dwc_otg_hcd);
+
+       if (dwc_otg_is_host_mode(dwc_otg_hcd->core_if)) {
+               /* Clean up any host channels that were in use. */
+               int num_channels;
+               int i;
+               dwc_hc_t *channel;
+               dwc_otg_hc_regs_t *hc_regs;
+               hcchar_data_t hcchar;
+
+               num_channels = dwc_otg_hcd->core_if->core_params->host_channels;
+
+               if (!dwc_otg_hcd->core_if->dma_enable) {
+                       /* Flush out any channel requests in slave mode. */
+                       for (i = 0; i < num_channels; i++) {
+                               channel = dwc_otg_hcd->hc_ptr_array[i];
+                               if (DWC_CIRCLEQ_EMPTY_ENTRY
+                                   (channel, hc_list_entry)) {
+                                       hc_regs =
+                                           dwc_otg_hcd->core_if->
+                                           host_if->hc_regs[i];
+                                       hcchar.d32 =
+                                           DWC_READ_REG32(&hc_regs->hcchar);
+                                       if (hcchar.b.chen) {
+                                               hcchar.b.chen = 0;
+                                               hcchar.b.chdis = 1;
+                                               hcchar.b.epdir = 0;
+                                               DWC_WRITE_REG32
+                                                   (&hc_regs->hcchar,
+                                                    hcchar.d32);
+                                       }
+                               }
+                       }
+               }
+
+               if(fiq_fsm_enable) {
+                       for(i=0; i < 128; i++) {
+                               dwc_otg_hcd->hub_port[i] = 0;
+                       }
+               }
+       }
+
+       if(fiq_enable) {
+               fiq_fsm_spin_unlock(&dwc_otg_hcd->fiq_state->lock);
+               local_fiq_enable();
+       }
+
+       if (dwc_otg_hcd->fops->disconnect) {
+               dwc_otg_hcd->fops->disconnect(dwc_otg_hcd);
+       }
+
+       DWC_SPINUNLOCK(dwc_otg_hcd->lock);
+       return 1;
+}
+
+/**
+ * HCD Callback function for stopping the HCD.
+ *
+ * @param p void pointer to the <code>struct usb_hcd</code>
+ */
+static int32_t dwc_otg_hcd_stop_cb(void *p)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd = p;
+
+       DWC_DEBUGPL(DBG_HCDV, "%s(%p)\n", __func__, p);
+       dwc_otg_hcd_stop(dwc_otg_hcd);
+       return 1;
+}
+
+#ifdef CONFIG_USB_DWC_OTG_LPM
+/**
+ * HCD Callback function for sleep of HCD.
+ *
+ * @param p void pointer to the <code>struct usb_hcd</code>
+ */
+static int dwc_otg_hcd_sleep_cb(void *p)
+{
+       dwc_otg_hcd_t *hcd = p;
+
+       dwc_otg_hcd_free_hc_from_lpm(hcd);
+
+       return 0;
+}
+#endif
+
+
+/**
+ * HCD Callback function for Remote Wakeup.
+ *
+ * @param p void pointer to the <code>struct usb_hcd</code>
+ */
+static int dwc_otg_hcd_rem_wakeup_cb(void *p)
+{
+       dwc_otg_hcd_t *hcd = p;
+
+       if (hcd->core_if->lx_state == DWC_OTG_L2) {
+               hcd->flags.b.port_suspend_change = 1;
+       }
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       else {
+               hcd->flags.b.port_l1_change = 1;
+       }
+#endif
+       return 0;
+}
+
+/**
+ * Halts the DWC_otg host mode operations in a clean manner. USB transfers are
+ * stopped.
+ */
+void dwc_otg_hcd_stop(dwc_otg_hcd_t * hcd)
+{
+       hprt0_data_t hprt0 = {.d32 = 0 };
+
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD STOP\n");
+
+       /*
+        * The root hub should be disconnected before this function is called.
+        * The disconnect will clear the QTD lists (via ..._hcd_urb_dequeue)
+        * and the QH lists (via ..._hcd_endpoint_disable).
+        */
+
+       /* Turn off all host-specific interrupts. */
+       dwc_otg_disable_host_interrupts(hcd->core_if);
+
+       /* Turn off the vbus power */
+       DWC_PRINTF("PortPower off\n");
+       hprt0.b.prtpwr = 0;
+       DWC_WRITE_REG32(hcd->core_if->host_if->hprt0, hprt0.d32);
+       dwc_mdelay(1);
+}
+
+int dwc_otg_hcd_urb_enqueue(dwc_otg_hcd_t * hcd,
+                           dwc_otg_hcd_urb_t * dwc_otg_urb, void **ep_handle,
+                           int atomic_alloc)
+{
+       int retval = 0;
+       uint8_t needs_scheduling = 0;
+       dwc_otg_transaction_type_e tr_type;
+       dwc_otg_qtd_t *qtd;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       hprt0_data_t hprt0 = { .d32 = 0 };
+
+#ifdef DEBUG /* integrity checks (Broadcom) */
+       if (NULL == hcd->core_if) {
+               DWC_ERROR("**** DWC OTG HCD URB Enqueue - HCD has NULL core_if\n");
+               /* No longer connected. */
+               return -DWC_E_INVALID;
+       }
+#endif
+       if (!hcd->flags.b.port_connect_status) {
+               /* No longer connected. */
+               DWC_ERROR("Not connected\n");
+               return -DWC_E_NO_DEVICE;
+       }
+
+       /* Some core configurations cannot support LS traffic on a FS root port */
+       if ((hcd->fops->speed(hcd, dwc_otg_urb->priv) == USB_SPEED_LOW) &&
+               (hcd->core_if->hwcfg2.b.fs_phy_type == 1) &&
+               (hcd->core_if->hwcfg2.b.hs_phy_type == 1)) {
+                       hprt0.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0);
+                       if (hprt0.b.prtspd == DWC_HPRT0_PRTSPD_FULL_SPEED) {
+                               return -DWC_E_NO_DEVICE;
+                       }
+       }
+
+       qtd = dwc_otg_hcd_qtd_create(dwc_otg_urb, atomic_alloc);
+       if (qtd == NULL) {
+               DWC_ERROR("DWC OTG HCD URB Enqueue failed creating QTD\n");
+               return -DWC_E_NO_MEMORY;
+       }
+#ifdef DEBUG /* integrity checks (Broadcom) */
+       if (qtd->urb == NULL) {
+               DWC_ERROR("**** DWC OTG HCD URB Enqueue created QTD with no URBs\n");
+               return -DWC_E_NO_MEMORY;
+       }
+       if (qtd->urb->priv == NULL) {
+               DWC_ERROR("**** DWC OTG HCD URB Enqueue created QTD URB with no URB handle\n");
+               return -DWC_E_NO_MEMORY;
+       }
+#endif
+       intr_mask.d32 = DWC_READ_REG32(&hcd->core_if->core_global_regs->gintmsk);
+       if(!intr_mask.b.sofintr || fiq_enable) needs_scheduling = 1;
+       if((((dwc_otg_qh_t *)ep_handle)->ep_type == UE_BULK) && !(qtd->urb->flags & URB_GIVEBACK_ASAP))
+               /* Do not schedule SG transactions until qtd has URB_GIVEBACK_ASAP set */
+               needs_scheduling = 0;
+
+       retval = dwc_otg_hcd_qtd_add(qtd, hcd, (dwc_otg_qh_t **) ep_handle, atomic_alloc);
+            // creates a new queue in ep_handle if it doesn't exist already
+       if (retval < 0) {
+               DWC_ERROR("DWC OTG HCD URB Enqueue failed adding QTD. "
+                         "Error status %d\n", retval);
+               dwc_otg_hcd_qtd_free(qtd);
+               return retval;
+       }
+
+       if(needs_scheduling) {
+               tr_type = dwc_otg_hcd_select_transactions(hcd);
+               if (tr_type != DWC_OTG_TRANSACTION_NONE) {
+                       dwc_otg_hcd_queue_transactions(hcd, tr_type);
+               }
+       }
+       return retval;
+}
+
+int dwc_otg_hcd_urb_dequeue(dwc_otg_hcd_t * hcd,
+                           dwc_otg_hcd_urb_t * dwc_otg_urb)
+{
+       dwc_otg_qh_t *qh;
+       dwc_otg_qtd_t *urb_qtd;
+       BUG_ON(!hcd);
+       BUG_ON(!dwc_otg_urb);
+
+#ifdef DEBUG /* integrity checks (Broadcom) */
+
+       if (hcd == NULL) {
+               DWC_ERROR("**** DWC OTG HCD URB Dequeue has NULL HCD\n");
+               return -DWC_E_INVALID;
+       }
+       if (dwc_otg_urb == NULL) {
+               DWC_ERROR("**** DWC OTG HCD URB Dequeue has NULL URB\n");
+               return -DWC_E_INVALID;
+       }
+       if (dwc_otg_urb->qtd == NULL) {
+               DWC_ERROR("**** DWC OTG HCD URB Dequeue with NULL QTD\n");
+               return -DWC_E_INVALID;
+       }
+       urb_qtd = dwc_otg_urb->qtd;
+       BUG_ON(!urb_qtd);
+       if (urb_qtd->qh == NULL) {
+               DWC_ERROR("**** DWC OTG HCD URB Dequeue with QTD with NULL Q handler\n");
+               return -DWC_E_INVALID;
+       }
+#else
+       urb_qtd = dwc_otg_urb->qtd;
+       BUG_ON(!urb_qtd);
+#endif
+       qh = urb_qtd->qh;
+       BUG_ON(!qh);
+       if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
+               if (urb_qtd->in_process) {
+                       dump_channel_info(hcd, qh);
+               }
+       }
+#ifdef DEBUG /* integrity checks (Broadcom) */
+       if (hcd->core_if == NULL) {
+               DWC_ERROR("**** DWC OTG HCD URB Dequeue HCD has NULL core_if\n");
+               return -DWC_E_INVALID;
+       }
+#endif
+       if (urb_qtd->in_process && qh->channel) {
+               /* The QTD is in process (it has been assigned to a channel). */
+               if (hcd->flags.b.port_connect_status) {
+                       int n = qh->channel->hc_num;
+                       /*
+                        * If still connected (i.e. in host mode), halt the
+                        * channel so it can be used for other transfers. If
+                        * no longer connected, the host registers can't be
+                        * written to halt the channel since the core is in
+                        * device mode.
+                        */
+                       /* In FIQ FSM mode, we need to shut down carefully.
+                        * The FIQ may attempt to restart a disabled channel */
+                       if (fiq_fsm_enable && (hcd->fiq_state->channel[n].fsm != FIQ_PASSTHROUGH)) {
+                               local_fiq_disable();
+                               fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+                               qh->channel->halt_status = DWC_OTG_HC_XFER_URB_DEQUEUE;
+                               qh->channel->halt_pending = 1;
+                               if (hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_TURBO ||
+                                       hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING)
+                                       hcd->fiq_state->channel[n].fsm = FIQ_HS_ISOC_ABORTED;
+                               fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+                               local_fiq_enable();
+                       } else {
+                               dwc_otg_hc_halt(hcd->core_if, qh->channel,
+                                               DWC_OTG_HC_XFER_URB_DEQUEUE);
+                       }
+               }
+       }
+
+       /*
+        * Free the QTD and clean up the associated QH. Leave the QH in the
+        * schedule if it has any remaining QTDs.
+        */
+
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD URB Dequeue - "
+                    "delete %sQueue handler\n",
+                    hcd->core_if->dma_desc_enable?"DMA ":"");
+       if (!hcd->core_if->dma_desc_enable) {
+               uint8_t b = urb_qtd->in_process;
+               if (nak_holdoff && qh->do_split && dwc_qh_is_non_per(qh))
+                       qh->nak_frame = 0xFFFF;
+               dwc_otg_hcd_qtd_remove_and_free(hcd, urb_qtd, qh);
+               if (b) {
+                       dwc_otg_hcd_qh_deactivate(hcd, qh, 0);
+                       qh->channel = NULL;
+               } else if (DWC_CIRCLEQ_EMPTY(&qh->qtd_list)) {
+                       dwc_otg_hcd_qh_remove(hcd, qh);
+               }
+       } else {
+               dwc_otg_hcd_qtd_remove_and_free(hcd, urb_qtd, qh);
+       }
+       return 0;
+}
+
+int dwc_otg_hcd_endpoint_disable(dwc_otg_hcd_t * hcd, void *ep_handle,
+                                int retry)
+{
+       dwc_otg_qh_t *qh = (dwc_otg_qh_t *) ep_handle;
+       int retval = 0;
+       dwc_irqflags_t flags;
+
+       if (retry < 0) {
+               retval = -DWC_E_INVALID;
+               goto done;
+       }
+
+       if (!qh) {
+               retval = -DWC_E_INVALID;
+               goto done;
+       }
+
+       DWC_SPINLOCK_IRQSAVE(hcd->lock, &flags);
+
+       while (!DWC_CIRCLEQ_EMPTY(&qh->qtd_list) && retry) {
+               DWC_SPINUNLOCK_IRQRESTORE(hcd->lock, flags);
+               retry--;
+               dwc_msleep(5);
+               DWC_SPINLOCK_IRQSAVE(hcd->lock, &flags);
+       }
+
+       dwc_otg_hcd_qh_remove(hcd, qh);
+
+       DWC_SPINUNLOCK_IRQRESTORE(hcd->lock, flags);
+       /*
+        * Split dwc_otg_hcd_qh_remove_and_free() into qh_remove
+        * and qh_free to prevent stack dump on DWC_DMA_FREE() with
+        * irq_disabled (spinlock_irqsave) in dwc_otg_hcd_desc_list_free()
+        * and dwc_otg_hcd_frame_list_alloc().
+        */
+       dwc_otg_hcd_qh_free(hcd, qh);
+
+done:
+       return retval;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30)
+int dwc_otg_hcd_endpoint_reset(dwc_otg_hcd_t * hcd, void *ep_handle)
+{
+       int retval = 0;
+       dwc_otg_qh_t *qh = (dwc_otg_qh_t *) ep_handle;
+       if (!qh)
+               return -DWC_E_INVALID;
+
+       qh->data_toggle = DWC_OTG_HC_PID_DATA0;
+       return retval;
+}
+#endif
+
+/**
+ * HCD Callback structure for handling mode switching.
+ */
+static dwc_otg_cil_callbacks_t hcd_cil_callbacks = {
+       .start = dwc_otg_hcd_start_cb,
+       .stop = dwc_otg_hcd_stop_cb,
+       .disconnect = dwc_otg_hcd_disconnect_cb,
+       .session_start = dwc_otg_hcd_session_start_cb,
+       .resume_wakeup = dwc_otg_hcd_rem_wakeup_cb,
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       .sleep = dwc_otg_hcd_sleep_cb,
+#endif
+       .p = 0,
+};
+
+/**
+ * Reset tasklet function
+ */
+static void reset_tasklet_func(void *data)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd = (dwc_otg_hcd_t *) data;
+       dwc_otg_core_if_t *core_if = dwc_otg_hcd->core_if;
+       hprt0_data_t hprt0;
+
+       DWC_DEBUGPL(DBG_HCDV, "USB RESET tasklet called\n");
+
+       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+       hprt0.b.prtrst = 1;
+       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+       dwc_mdelay(60);
+
+       hprt0.b.prtrst = 0;
+       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+       dwc_otg_hcd->flags.b.port_reset_change = 1;
+}
+
+static void completion_tasklet_func(void *ptr)
+{
+       dwc_otg_hcd_t *hcd = (dwc_otg_hcd_t *) ptr;
+       struct urb *urb;
+       urb_tq_entry_t *item;
+       dwc_irqflags_t flags;
+
+       /* This could just be spin_lock_irq */
+       DWC_SPINLOCK_IRQSAVE(hcd->lock, &flags);
+       while (!DWC_TAILQ_EMPTY(&hcd->completed_urb_list)) {
+               item = DWC_TAILQ_FIRST(&hcd->completed_urb_list);
+               urb = item->urb;
+               DWC_TAILQ_REMOVE(&hcd->completed_urb_list, item,
+                               urb_tq_entries);
+               DWC_SPINUNLOCK_IRQRESTORE(hcd->lock, flags);
+               DWC_FREE(item);
+
+               usb_hcd_giveback_urb(hcd->priv, urb, urb->status);
+
+
+               DWC_SPINLOCK_IRQSAVE(hcd->lock, &flags);
+       }
+       DWC_SPINUNLOCK_IRQRESTORE(hcd->lock, flags);
+       return;
+}
+
+static void qh_list_free(dwc_otg_hcd_t * hcd, dwc_list_link_t * qh_list)
+{
+       dwc_list_link_t *item;
+       dwc_otg_qh_t *qh;
+       dwc_irqflags_t flags;
+
+       if (!qh_list->next) {
+               /* The list hasn't been initialized yet. */
+               return;
+       }
+       /*
+        * Hold spinlock here. Not needed in that case if bellow
+        * function is being called from ISR
+        */
+       DWC_SPINLOCK_IRQSAVE(hcd->lock, &flags);
+       /* Ensure there are no QTDs or URBs left. */
+       kill_urbs_in_qh_list(hcd, qh_list);
+       DWC_SPINUNLOCK_IRQRESTORE(hcd->lock, flags);
+
+       DWC_LIST_FOREACH(item, qh_list) {
+               qh = DWC_LIST_ENTRY(item, dwc_otg_qh_t, qh_list_entry);
+               dwc_otg_hcd_qh_remove_and_free(hcd, qh);
+       }
+}
+
+/**
+ * Exit from Hibernation if Host did not detect SRP from connected SRP capable
+ * Device during SRP time by host power up.
+ */
+void dwc_otg_hcd_power_up(void *ptr)
+{
+       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+       dwc_otg_core_if_t *core_if = (dwc_otg_core_if_t *) ptr;
+
+       DWC_PRINTF("%s called\n", __FUNCTION__);
+
+       if (!core_if->hibernation_suspend) {
+               DWC_PRINTF("Already exited from Hibernation\n");
+               return;
+       }
+
+       /* Switch on the voltage to the core */
+       gpwrdn.b.pwrdnswtch = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Reset the core */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Disable power clamps */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnclmp = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       /* Remove reset the core signal */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pwrdnrstn = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
+       dwc_udelay(10);
+
+       /* Disable PMU interrupt */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuintsel = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       core_if->hibernation_suspend = 0;
+
+       /* Disable PMU */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.pmuactv = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+       dwc_udelay(10);
+
+       /* Enable VBUS */
+       gpwrdn.d32 = 0;
+       gpwrdn.b.dis_vbus = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
+
+       core_if->op_state = A_HOST;
+       dwc_otg_core_init(core_if);
+       dwc_otg_enable_global_interrupts(core_if);
+       cil_hcd_start(core_if);
+}
+
+void dwc_otg_cleanup_fiq_channel(dwc_otg_hcd_t *hcd, uint32_t num)
+{
+       struct fiq_channel_state *st = &hcd->fiq_state->channel[num];
+       struct fiq_dma_blob *blob = hcd->fiq_dmab;
+       int i;
+
+       st->fsm = FIQ_PASSTHROUGH;
+       st->hcchar_copy.d32 = 0;
+       st->hcsplt_copy.d32 = 0;
+       st->hcint_copy.d32 = 0;
+       st->hcintmsk_copy.d32 = 0;
+       st->hctsiz_copy.d32 = 0;
+       st->hcdma_copy.d32 = 0;
+       st->nr_errors = 0;
+       st->hub_addr = 0;
+       st->port_addr = 0;
+       st->expected_uframe = 0;
+       st->nrpackets = 0;
+       st->dma_info.index = 0;
+       for (i = 0; i < 6; i++)
+               st->dma_info.slot_len[i] = 255;
+       st->hs_isoc_info.index = 0;
+       st->hs_isoc_info.iso_desc = NULL;
+       st->hs_isoc_info.nrframes = 0;
+
+       DWC_MEMSET(&blob->channel[num].index[0], 0x6b, 1128);
+}
+
+/**
+ * Frees secondary storage associated with the dwc_otg_hcd structure contained
+ * in the struct usb_hcd field.
+ */
+static void dwc_otg_hcd_free(dwc_otg_hcd_t * dwc_otg_hcd)
+{
+       struct device *dev = dwc_otg_hcd_to_dev(dwc_otg_hcd);
+       int i;
+
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD FREE\n");
+
+       del_timers(dwc_otg_hcd);
+
+       /* Free memory for QH/QTD lists */
+       qh_list_free(dwc_otg_hcd, &dwc_otg_hcd->non_periodic_sched_inactive);
+       qh_list_free(dwc_otg_hcd, &dwc_otg_hcd->non_periodic_sched_active);
+       qh_list_free(dwc_otg_hcd, &dwc_otg_hcd->periodic_sched_inactive);
+       qh_list_free(dwc_otg_hcd, &dwc_otg_hcd->periodic_sched_ready);
+       qh_list_free(dwc_otg_hcd, &dwc_otg_hcd->periodic_sched_assigned);
+       qh_list_free(dwc_otg_hcd, &dwc_otg_hcd->periodic_sched_queued);
+
+       /* Free memory for the host channels. */
+       for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+               dwc_hc_t *hc = dwc_otg_hcd->hc_ptr_array[i];
+
+#ifdef DEBUG
+               if (dwc_otg_hcd->core_if->hc_xfer_timer[i]) {
+                       DWC_TIMER_FREE(dwc_otg_hcd->core_if->hc_xfer_timer[i]);
+               }
+#endif
+               if (hc != NULL) {
+                       DWC_DEBUGPL(DBG_HCDV, "HCD Free channel #%i, hc=%p\n",
+                                   i, hc);
+                       DWC_FREE(hc);
+               }
+       }
+
+       if (dwc_otg_hcd->core_if->dma_enable) {
+               if (dwc_otg_hcd->status_buf_dma) {
+                       DWC_DMA_FREE(dev, DWC_OTG_HCD_STATUS_BUF_SIZE,
+                                    dwc_otg_hcd->status_buf,
+                                    dwc_otg_hcd->status_buf_dma);
+               }
+       } else if (dwc_otg_hcd->status_buf != NULL) {
+               DWC_FREE(dwc_otg_hcd->status_buf);
+       }
+       DWC_SPINLOCK_FREE(dwc_otg_hcd->lock);
+       /* Set core_if's lock pointer to NULL */
+       dwc_otg_hcd->core_if->lock = NULL;
+
+       DWC_TIMER_FREE(dwc_otg_hcd->conn_timer);
+       DWC_TASK_FREE(dwc_otg_hcd->reset_tasklet);
+       DWC_TASK_FREE(dwc_otg_hcd->completion_tasklet);
+       DWC_DMA_FREE(dev, 16, dwc_otg_hcd->fiq_state->dummy_send,
+                    dwc_otg_hcd->fiq_state->dummy_send_dma);
+       DWC_FREE(dwc_otg_hcd->fiq_state);
+
+#ifdef DWC_DEV_SRPCAP
+       if (dwc_otg_hcd->core_if->power_down == 2 &&
+           dwc_otg_hcd->core_if->pwron_timer) {
+               DWC_TIMER_FREE(dwc_otg_hcd->core_if->pwron_timer);
+       }
+#endif
+       DWC_FREE(dwc_otg_hcd);
+}
+
+int dwc_otg_hcd_init(dwc_otg_hcd_t * hcd, dwc_otg_core_if_t * core_if)
+{
+       struct device *dev = dwc_otg_hcd_to_dev(hcd);
+       int retval = 0;
+       int num_channels;
+       int i;
+       dwc_hc_t *channel;
+
+#if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_SPINLOCK))
+       DWC_SPINLOCK_ALLOC_LINUX_DEBUG(hcd->lock);
+#else
+       hcd->lock = DWC_SPINLOCK_ALLOC();
+#endif
+        DWC_DEBUGPL(DBG_HCDV, "init of HCD %p given core_if %p\n",
+                    hcd, core_if);
+       if (!hcd->lock) {
+               DWC_ERROR("Could not allocate lock for pcd");
+               DWC_FREE(hcd);
+               retval = -DWC_E_NO_MEMORY;
+               goto out;
+       }
+       hcd->core_if = core_if;
+
+       /* Register the HCD CIL Callbacks */
+       dwc_otg_cil_register_hcd_callbacks(hcd->core_if,
+                                          &hcd_cil_callbacks, hcd);
+
+       /* Initialize the non-periodic schedule. */
+       DWC_LIST_INIT(&hcd->non_periodic_sched_inactive);
+       DWC_LIST_INIT(&hcd->non_periodic_sched_active);
+
+       /* Initialize the periodic schedule. */
+       DWC_LIST_INIT(&hcd->periodic_sched_inactive);
+       DWC_LIST_INIT(&hcd->periodic_sched_ready);
+       DWC_LIST_INIT(&hcd->periodic_sched_assigned);
+       DWC_LIST_INIT(&hcd->periodic_sched_queued);
+       DWC_TAILQ_INIT(&hcd->completed_urb_list);
+       /*
+        * Create a host channel descriptor for each host channel implemented
+        * in the controller. Initialize the channel descriptor array.
+        */
+       DWC_CIRCLEQ_INIT(&hcd->free_hc_list);
+       num_channels = hcd->core_if->core_params->host_channels;
+       DWC_MEMSET(hcd->hc_ptr_array, 0, sizeof(hcd->hc_ptr_array));
+       for (i = 0; i < num_channels; i++) {
+               channel = DWC_ALLOC(sizeof(dwc_hc_t));
+               if (channel == NULL) {
+                       retval = -DWC_E_NO_MEMORY;
+                       DWC_ERROR("%s: host channel allocation failed\n",
+                                 __func__);
+                       dwc_otg_hcd_free(hcd);
+                       goto out;
+               }
+               channel->hc_num = i;
+               hcd->hc_ptr_array[i] = channel;
+#ifdef DEBUG
+               hcd->core_if->hc_xfer_timer[i] =
+                   DWC_TIMER_ALLOC("hc timer", hc_xfer_timeout,
+                                   &hcd->core_if->hc_xfer_info[i]);
+#endif
+               DWC_DEBUGPL(DBG_HCDV, "HCD Added channel #%d, hc=%p\n", i,
+                           channel);
+       }
+
+       if (fiq_enable) {
+               hcd->fiq_state = DWC_ALLOC(sizeof(struct fiq_state) + (sizeof(struct fiq_channel_state) * num_channels));
+               if (!hcd->fiq_state) {
+                       retval = -DWC_E_NO_MEMORY;
+                       DWC_ERROR("%s: cannot allocate fiq_state structure\n", __func__);
+                       dwc_otg_hcd_free(hcd);
+                       goto out;
+               }
+               DWC_MEMSET(hcd->fiq_state, 0, (sizeof(struct fiq_state) + (sizeof(struct fiq_channel_state) * num_channels)));
+
+#ifdef CONFIG_ARM64
+               spin_lock_init(&hcd->fiq_state->lock);
+#endif
+
+               for (i = 0; i < num_channels; i++) {
+                       hcd->fiq_state->channel[i].fsm = FIQ_PASSTHROUGH;
+               }
+               hcd->fiq_state->dummy_send = DWC_DMA_ALLOC_ATOMIC(dev, 16,
+                                                        &hcd->fiq_state->dummy_send_dma);
+
+               hcd->fiq_stack = DWC_ALLOC(sizeof(struct fiq_stack));
+               if (!hcd->fiq_stack) {
+                       retval = -DWC_E_NO_MEMORY;
+                       DWC_ERROR("%s: cannot allocate fiq_stack structure\n", __func__);
+                       dwc_otg_hcd_free(hcd);
+                       goto out;
+               }
+               hcd->fiq_stack->magic1 = 0xDEADBEEF;
+               hcd->fiq_stack->magic2 = 0xD00DFEED;
+               hcd->fiq_state->gintmsk_saved.d32 = ~0;
+               hcd->fiq_state->haintmsk_saved.b2.chint = ~0;
+
+               /* This bit is terrible and uses no API, but necessary. The FIQ has no concept of DMA pools
+                * (and if it did, would be a lot slower). This allocates a chunk of memory (~9kiB for 8 host channels)
+                * for use as transaction bounce buffers in a 2-D array. Our access into this chunk is done by some
+                * moderately readable array casts.
+                */
+               hcd->fiq_dmab = DWC_DMA_ALLOC(dev, (sizeof(struct fiq_dma_channel) * num_channels), &hcd->fiq_state->dma_base);
+               DWC_WARN("FIQ DMA bounce buffers: virt = %px dma = %pad len=%zu",
+                               hcd->fiq_dmab, &hcd->fiq_state->dma_base,
+                               sizeof(struct fiq_dma_channel) * num_channels);
+
+               DWC_MEMSET(hcd->fiq_dmab, 0x6b, 9024);
+
+               /* pointer for debug in fiq_print */
+               hcd->fiq_state->fiq_dmab = hcd->fiq_dmab;
+               if (fiq_fsm_enable) {
+                       int i;
+                       for (i=0; i < hcd->core_if->core_params->host_channels; i++) {
+                               dwc_otg_cleanup_fiq_channel(hcd, i);
+                       }
+                       DWC_PRINTF("FIQ FSM acceleration enabled for :\n%s%s%s%s",
+                               (fiq_fsm_mask & 0x1) ? "Non-periodic Split Transactions\n" : "",
+                               (fiq_fsm_mask & 0x2) ? "Periodic Split Transactions\n" : "",
+                               (fiq_fsm_mask & 0x4) ? "High-Speed Isochronous Endpoints\n" : "",
+                               (fiq_fsm_mask & 0x8) ? "Interrupt/Control Split Transaction hack enabled\n" : "");
+               }
+       }
+
+       /* Initialize the Connection timeout timer. */
+       hcd->conn_timer = DWC_TIMER_ALLOC("Connection timer",
+                                         dwc_otg_hcd_connect_timeout, 0);
+
+       printk(KERN_DEBUG "dwc_otg: Microframe scheduler %s\n", microframe_schedule ? "enabled":"disabled");
+       if (microframe_schedule)
+               init_hcd_usecs(hcd);
+
+       /* Initialize reset tasklet. */
+       hcd->reset_tasklet = DWC_TASK_ALLOC("reset_tasklet", reset_tasklet_func, hcd);
+
+       hcd->completion_tasklet = DWC_TASK_ALLOC("completion_tasklet",
+                                               completion_tasklet_func, hcd);
+#ifdef DWC_DEV_SRPCAP
+       if (hcd->core_if->power_down == 2) {
+               /* Initialize Power on timer for Host power up in case hibernation */
+               hcd->core_if->pwron_timer = DWC_TIMER_ALLOC("PWRON TIMER",
+                                                                       dwc_otg_hcd_power_up, core_if);
+       }
+#endif
+
+       /*
+        * Allocate space for storing data on status transactions. Normally no
+        * data is sent, but this space acts as a bit bucket. This must be
+        * done after usb_add_hcd since that function allocates the DMA buffer
+        * pool.
+        */
+       if (hcd->core_if->dma_enable) {
+               hcd->status_buf =
+                   DWC_DMA_ALLOC(dev, DWC_OTG_HCD_STATUS_BUF_SIZE,
+                                 &hcd->status_buf_dma);
+       } else {
+               hcd->status_buf = DWC_ALLOC(DWC_OTG_HCD_STATUS_BUF_SIZE);
+       }
+       if (!hcd->status_buf) {
+               retval = -DWC_E_NO_MEMORY;
+               DWC_ERROR("%s: status_buf allocation failed\n", __func__);
+               dwc_otg_hcd_free(hcd);
+               goto out;
+       }
+
+       hcd->otg_port = 1;
+       hcd->frame_list = NULL;
+       hcd->frame_list_dma = 0;
+       hcd->periodic_qh_count = 0;
+
+       DWC_MEMSET(hcd->hub_port, 0, sizeof(hcd->hub_port));
+#ifdef FIQ_DEBUG
+       DWC_MEMSET(hcd->hub_port_alloc, -1, sizeof(hcd->hub_port_alloc));
+#endif
+
+out:
+       return retval;
+}
+
+void dwc_otg_hcd_remove(dwc_otg_hcd_t * hcd)
+{
+       /* Turn off all host-specific interrupts. */
+       dwc_otg_disable_host_interrupts(hcd->core_if);
+
+       dwc_otg_hcd_free(hcd);
+}
+
+/**
+ * Initializes dynamic portions of the DWC_otg HCD state.
+ */
+static void dwc_otg_hcd_reinit(dwc_otg_hcd_t * hcd)
+{
+       int num_channels;
+       int i;
+       dwc_hc_t *channel;
+       dwc_hc_t *channel_tmp;
+
+       hcd->flags.d32 = 0;
+
+       hcd->non_periodic_qh_ptr = &hcd->non_periodic_sched_active;
+       if (!microframe_schedule) {
+               hcd->non_periodic_channels = 0;
+               hcd->periodic_channels = 0;
+       } else {
+               hcd->available_host_channels = hcd->core_if->core_params->host_channels;
+       }
+       /*
+        * Put all channels in the free channel list and clean up channel
+        * states.
+        */
+       DWC_CIRCLEQ_FOREACH_SAFE(channel, channel_tmp,
+                                &hcd->free_hc_list, hc_list_entry) {
+               DWC_CIRCLEQ_REMOVE(&hcd->free_hc_list, channel, hc_list_entry);
+       }
+
+       num_channels = hcd->core_if->core_params->host_channels;
+       for (i = 0; i < num_channels; i++) {
+               channel = hcd->hc_ptr_array[i];
+               DWC_CIRCLEQ_INSERT_TAIL(&hcd->free_hc_list, channel,
+                                       hc_list_entry);
+               dwc_otg_hc_cleanup(hcd->core_if, channel);
+       }
+
+       /* Initialize the DWC core for host mode operation. */
+       dwc_otg_core_host_init(hcd->core_if);
+
+       /* Set core_if's lock pointer to the hcd->lock */
+       hcd->core_if->lock = hcd->lock;
+}
+
+/**
+ * Assigns transactions from a QTD to a free host channel and initializes the
+ * host channel to perform the transactions. The host channel is removed from
+ * the free list.
+ *
+ * @param hcd The HCD state structure.
+ * @param qh Transactions from the first QTD for this QH are selected and
+ * assigned to a free host channel.
+ */
+static void assign_and_init_hc(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       dwc_hc_t *hc;
+       dwc_otg_qtd_t *qtd;
+       dwc_otg_hcd_urb_t *urb;
+       void* ptr = NULL;
+       uint16_t wLength;
+       uint32_t intr_enable;
+       unsigned long flags;
+       gintmsk_data_t gintmsk = { .d32 = 0, };
+       struct device *dev = dwc_otg_hcd_to_dev(hcd);
+
+       qtd = DWC_CIRCLEQ_FIRST(&qh->qtd_list);
+
+       urb = qtd->urb;
+
+       DWC_DEBUGPL(DBG_HCDV, "%s(%p,%p) - urb %x, actual_length %d\n", __func__, hcd, qh, (unsigned int)urb, urb->actual_length);
+
+       if (((urb->actual_length < 0) || (urb->actual_length > urb->length)) && !dwc_otg_hcd_is_pipe_in(&urb->pipe_info))
+               urb->actual_length = urb->length;
+
+
+       hc = DWC_CIRCLEQ_FIRST(&hcd->free_hc_list);
+
+       /* Remove the host channel from the free list. */
+       DWC_CIRCLEQ_REMOVE_INIT(&hcd->free_hc_list, hc, hc_list_entry);
+
+       qh->channel = hc;
+
+       qtd->in_process = 1;
+
+       /*
+        * Use usb_pipedevice to determine device address. This address is
+        * 0 before the SET_ADDRESS command and the correct address afterward.
+        */
+       hc->dev_addr = dwc_otg_hcd_get_dev_addr(&urb->pipe_info);
+       hc->ep_num = dwc_otg_hcd_get_ep_num(&urb->pipe_info);
+       hc->speed = qh->dev_speed;
+       hc->max_packet = dwc_max_packet(qh->maxp);
+
+       hc->xfer_started = 0;
+       hc->halt_status = DWC_OTG_HC_XFER_NO_HALT_STATUS;
+       hc->error_state = (qtd->error_count > 0);
+       hc->halt_on_queue = 0;
+       hc->halt_pending = 0;
+       hc->requests = 0;
+
+       /*
+        * The following values may be modified in the transfer type section
+        * below. The xfer_len value may be reduced when the transfer is
+        * started to accommodate the max widths of the XferSize and PktCnt
+        * fields in the HCTSIZn register.
+        */
+
+       hc->ep_is_in = (dwc_otg_hcd_is_pipe_in(&urb->pipe_info) != 0);
+       if (hc->ep_is_in) {
+               hc->do_ping = 0;
+       } else {
+               hc->do_ping = qh->ping_state;
+       }
+
+       hc->data_pid_start = qh->data_toggle;
+       hc->multi_count = 1;
+
+       if (hcd->core_if->dma_enable) {
+               hc->xfer_buff = (uint8_t *) urb->dma + urb->actual_length;
+
+               /* For non-dword aligned case */
+               if (((unsigned long)hc->xfer_buff & 0x3)
+                   && !hcd->core_if->dma_desc_enable) {
+                       ptr = (uint8_t *) urb->buf + urb->actual_length;
+               }
+       } else {
+               hc->xfer_buff = (uint8_t *) urb->buf + urb->actual_length;
+       }
+       hc->xfer_len = urb->length - urb->actual_length;
+       hc->xfer_count = 0;
+
+       /*
+        * Set the split attributes
+        */
+       hc->do_split = 0;
+       if (qh->do_split) {
+               uint32_t hub_addr, port_addr;
+               hc->do_split = 1;
+               hc->start_pkt_count = 1;
+               hc->xact_pos = qtd->isoc_split_pos;
+               /* We don't need to do complete splits anymore */
+//             if(fiq_fsm_enable)
+               if (0)
+                       hc->complete_split = qtd->complete_split = 0;
+               else
+                       hc->complete_split = qtd->complete_split;
+
+               hcd->fops->hub_info(hcd, urb->priv, &hub_addr, &port_addr);
+               hc->hub_addr = (uint8_t) hub_addr;
+               hc->port_addr = (uint8_t) port_addr;
+       }
+
+       switch (dwc_otg_hcd_get_pipe_type(&urb->pipe_info)) {
+       case UE_CONTROL:
+               hc->ep_type = DWC_OTG_EP_TYPE_CONTROL;
+               switch (qtd->control_phase) {
+               case DWC_OTG_CONTROL_SETUP:
+                       DWC_DEBUGPL(DBG_HCDV, "  Control setup transaction\n");
+                       hc->do_ping = 0;
+                       hc->ep_is_in = 0;
+                       hc->data_pid_start = DWC_OTG_HC_PID_SETUP;
+                       if (hcd->core_if->dma_enable) {
+                               hc->xfer_buff = (uint8_t *) urb->setup_dma;
+                       } else {
+                               hc->xfer_buff = (uint8_t *) urb->setup_packet;
+                       }
+                       hc->xfer_len = 8;
+                       ptr = NULL;
+                       break;
+               case DWC_OTG_CONTROL_DATA:
+                       DWC_DEBUGPL(DBG_HCDV, "  Control data transaction\n");
+                       /*
+                        * Hardware bug: small IN packets with length < 4
+                        * cause a 4-byte write to memory. We can only catch
+                        * the case where we know a short packet is going to be
+                        * returned in a control transfer, as the length is
+                        * specified in the setup packet. This is only an issue
+                        * for drivers that insist on packing a device's various
+                        * properties into a struct and querying them one at a
+                        * time (uvcvideo).
+                        * Force the use of align_buf so that the subsequent
+                        * memcpy puts the right number of bytes in the URB's
+                        * buffer.
+                        */
+                       wLength = ((uint16_t *)urb->setup_packet)[3];
+                       if (hc->ep_is_in && wLength < 4)
+                               ptr = hc->xfer_buff;
+
+                       hc->data_pid_start = qtd->data_toggle;
+                       break;
+               case DWC_OTG_CONTROL_STATUS:
+                       /*
+                        * Direction is opposite of data direction or IN if no
+                        * data.
+                        */
+                       DWC_DEBUGPL(DBG_HCDV, "  Control status transaction\n");
+                       if (urb->length == 0) {
+                               hc->ep_is_in = 1;
+                       } else {
+                               hc->ep_is_in =
+                                   dwc_otg_hcd_is_pipe_out(&urb->pipe_info);
+                       }
+                       if (hc->ep_is_in) {
+                               hc->do_ping = 0;
+                       }
+
+                       hc->data_pid_start = DWC_OTG_HC_PID_DATA1;
+
+                       hc->xfer_len = 0;
+                       if (hcd->core_if->dma_enable) {
+                               hc->xfer_buff = (uint8_t *) hcd->status_buf_dma;
+                       } else {
+                               hc->xfer_buff = (uint8_t *) hcd->status_buf;
+                       }
+                       ptr = NULL;
+                       break;
+               }
+               break;
+       case UE_BULK:
+               hc->ep_type = DWC_OTG_EP_TYPE_BULK;
+               break;
+       case UE_INTERRUPT:
+               hc->ep_type = DWC_OTG_EP_TYPE_INTR;
+               break;
+       case UE_ISOCHRONOUS:
+               {
+                       struct dwc_otg_hcd_iso_packet_desc *frame_desc;
+
+                       hc->ep_type = DWC_OTG_EP_TYPE_ISOC;
+
+                       if (hcd->core_if->dma_desc_enable)
+                               break;
+
+                       frame_desc = &urb->iso_descs[qtd->isoc_frame_index];
+
+                       frame_desc->status = 0;
+
+                       if (hcd->core_if->dma_enable) {
+                               hc->xfer_buff = (uint8_t *) urb->dma;
+                       } else {
+                               hc->xfer_buff = (uint8_t *) urb->buf;
+                       }
+                       hc->xfer_buff +=
+                           frame_desc->offset + qtd->isoc_split_offset;
+                       hc->xfer_len =
+                           frame_desc->length - qtd->isoc_split_offset;
+
+                       /* For non-dword aligned buffers */
+                       if (((unsigned long)hc->xfer_buff & 0x3)
+                           && hcd->core_if->dma_enable) {
+                               ptr =
+                                   (uint8_t *) urb->buf + frame_desc->offset +
+                                   qtd->isoc_split_offset;
+                       } else
+                               ptr = NULL;
+
+                       if (hc->xact_pos == DWC_HCSPLIT_XACTPOS_ALL) {
+                               if (hc->xfer_len <= 188) {
+                                       hc->xact_pos = DWC_HCSPLIT_XACTPOS_ALL;
+                               } else {
+                                       hc->xact_pos =
+                                           DWC_HCSPLIT_XACTPOS_BEGIN;
+                               }
+                       }
+               }
+               break;
+       }
+       /* non DWORD-aligned buffer case */
+       if (ptr) {
+               uint32_t buf_size;
+               if (hc->ep_type != DWC_OTG_EP_TYPE_ISOC) {
+                       buf_size = hcd->core_if->core_params->max_transfer_size;
+               } else {
+                       buf_size = 4096;
+               }
+               if (!qh->dw_align_buf) {
+                       qh->dw_align_buf = DWC_DMA_ALLOC_ATOMIC(dev, buf_size,
+                                                        &qh->dw_align_buf_dma);
+                       if (!qh->dw_align_buf) {
+                               DWC_ERROR
+                                   ("%s: Failed to allocate memory to handle "
+                                    "non-dword aligned buffer case\n",
+                                    __func__);
+                               return;
+                       }
+               }
+               if (!hc->ep_is_in) {
+                       dwc_memcpy(qh->dw_align_buf, ptr, hc->xfer_len);
+               }
+               hc->align_buff = qh->dw_align_buf_dma;
+       } else {
+               hc->align_buff = 0;
+       }
+
+       if (hc->ep_type == DWC_OTG_EP_TYPE_INTR ||
+           hc->ep_type == DWC_OTG_EP_TYPE_ISOC) {
+               /*
+                * This value may be modified when the transfer is started to
+                * reflect the actual transfer length.
+                */
+               hc->multi_count = dwc_hb_mult(qh->maxp);
+       }
+
+       if (hcd->core_if->dma_desc_enable)
+               hc->desc_list_addr = qh->desc_list_dma;
+
+       dwc_otg_hc_init(hcd->core_if, hc);
+
+       local_irq_save(flags);
+
+       if (fiq_enable) {
+               local_fiq_disable();
+               fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+       }
+
+       /* Enable the top level host channel interrupt. */
+       intr_enable = (1 << hc->hc_num);
+       DWC_MODIFY_REG32(&hcd->core_if->host_if->host_global_regs->haintmsk, 0, intr_enable);
+
+       /* Make sure host channel interrupts are enabled. */
+       gintmsk.b.hcintr = 1;
+       DWC_MODIFY_REG32(&hcd->core_if->core_global_regs->gintmsk, 0, gintmsk.d32);
+
+       if (fiq_enable) {
+               fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+               local_fiq_enable();
+       }
+
+       local_irq_restore(flags);
+       hc->qh = qh;
+}
+
+
+/**
+ * fiq_fsm_transaction_suitable() - Test a QH for compatibility with the FIQ
+ * @hcd:       Pointer to the dwc_otg_hcd struct
+ * @qh:        pointer to the endpoint's queue head
+ *
+ * Transaction start/end control flow is grafted onto the existing dwc_otg
+ * mechanisms, to avoid spaghettifying the functions more than they already are.
+ * This function's eligibility check is altered by debug parameter.
+ *
+ * Returns: 0 for unsuitable, 1 implies the FIQ can be enabled for this transaction.
+ */
+
+int fiq_fsm_transaction_suitable(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+{
+       if (qh->do_split) {
+               switch (qh->ep_type) {
+               case UE_CONTROL:
+               case UE_BULK:
+                       if (fiq_fsm_mask & (1 << 0))
+                               return 1;
+                       break;
+               case UE_INTERRUPT:
+               case UE_ISOCHRONOUS:
+                       if (fiq_fsm_mask & (1 << 1))
+                               return 1;
+                       break;
+               default:
+                       break;
+               }
+       } else if (qh->ep_type == UE_ISOCHRONOUS) {
+               if (fiq_fsm_mask & (1 << 2)) {
+                       /* ISOCH support. We test for compatibility:
+                        * - DWORD aligned buffers
+                        * - Must be at least 2 transfers (otherwise pointless to use the FIQ)
+                        * If yes, then the fsm enqueue function will handle the state machine setup.
+                        */
+                       dwc_otg_qtd_t *qtd = DWC_CIRCLEQ_FIRST(&qh->qtd_list);
+                       dwc_otg_hcd_urb_t *urb = qtd->urb;
+                       dwc_dma_t ptr;
+                       int i;
+
+                       if (urb->packet_count < 2)
+                               return 0;
+                       for (i = 0; i < urb->packet_count; i++) {
+                               ptr = urb->dma + urb->iso_descs[i].offset;
+                               if (ptr & 0x3)
+                                       return 0;
+                       }
+                       return 1;
+               }
+       }
+       return 0;
+}
+
+/**
+ * fiq_fsm_setup_periodic_dma() - Set up DMA bounce buffers
+ * @hcd: Pointer to the dwc_otg_hcd struct
+ * @qh: Pointer to the endpoint's queue head
+ *
+ * Periodic split transactions are transmitted modulo 188 bytes.
+ * This necessitates slicing data up into buckets for isochronous out
+ * and fixing up the DMA address for all IN transfers.
+ *
+ * Returns 1 if the DMA bounce buffers have been used, 0 if the default
+ * HC buffer has been used.
+ */
+int fiq_fsm_setup_periodic_dma(dwc_otg_hcd_t *hcd, struct fiq_channel_state *st, dwc_otg_qh_t *qh)
+ {
+       int frame_length, i = 0;
+       uint8_t *ptr = NULL;
+       dwc_hc_t *hc = qh->channel;
+       struct fiq_dma_blob *blob;
+       struct dwc_otg_hcd_iso_packet_desc *frame_desc;
+
+       for (i = 0; i < 6; i++) {
+               st->dma_info.slot_len[i] = 255;
+       }
+       st->dma_info.index = 0;
+       i = 0;
+       if (hc->ep_is_in) {
+               /*
+                * Set dma_regs to bounce buffer. FIQ will update the
+                * state depending on transaction progress.
+                * Pointer arithmetic on hcd->fiq_state->dma_base (a dma_addr_t)
+                * to point it to the correct offset in the allocated buffers.
+                */
+               blob = (struct fiq_dma_blob *) hcd->fiq_state->dma_base;
+               st->hcdma_copy.d32 = (dma_addr_t) blob->channel[hc->hc_num].index[0].buf;
+
+               /* Calculate the max number of CSPLITS such that the FIQ can time out
+                * a transaction if it fails.
+                */
+               frame_length = st->hcchar_copy.b.mps;
+               do {
+                       i++;
+                       frame_length -= 188;
+               } while (frame_length >= 0);
+               st->nrpackets = i;
+               return 1;
+       } else {
+               if (qh->ep_type == UE_ISOCHRONOUS) {
+
+                       dwc_otg_qtd_t *qtd = DWC_CIRCLEQ_FIRST(&qh->qtd_list);
+
+                       frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index];
+                       frame_length = frame_desc->length;
+
+                       /* Virtual address for bounce buffers */
+                       blob = hcd->fiq_dmab;
+
+                       ptr = qtd->urb->buf + frame_desc->offset;
+                       if (frame_length == 0) {
+                               /*
+                                * for isochronous transactions, we must still transmit a packet
+                                * even if the length is zero.
+                                */
+                               st->dma_info.slot_len[0] = 0;
+                               st->nrpackets = 1;
+                       } else {
+                               do {
+                                       if (frame_length <= 188) {
+                                               dwc_memcpy(&blob->channel[hc->hc_num].index[i].buf[0], ptr, frame_length);
+                                               st->dma_info.slot_len[i] = frame_length;
+                                               ptr += frame_length;
+                                       } else {
+                                               dwc_memcpy(&blob->channel[hc->hc_num].index[i].buf[0], ptr, 188);
+                                               st->dma_info.slot_len[i] = 188;
+                                               ptr += 188;
+                                       }
+                                       i++;
+                                       frame_length -= 188;
+                               } while (frame_length > 0);
+                               st->nrpackets = i;
+                       }
+                       ptr = qtd->urb->buf + frame_desc->offset;
+                       /*
+                        * Point the HC at the DMA address of the bounce buffers
+                        *
+                        * Pointer arithmetic on hcd->fiq_state->dma_base (a
+                        * dma_addr_t) to point it to the correct offset in the
+                        * allocated buffers.
+                        */
+                       blob = (struct fiq_dma_blob *) hcd->fiq_state->dma_base;
+                       st->hcdma_copy.d32 = (dma_addr_t) blob->channel[hc->hc_num].index[0].buf;
+
+                       /* fixup xfersize to the actual packet size */
+                       st->hctsiz_copy.b.pid = 0;
+                       st->hctsiz_copy.b.xfersize = st->dma_info.slot_len[0];
+                       return 1;
+               } else {
+                       /* For interrupt, single OUT packet required, goes in the SSPLIT from hc_buff. */
+                       return 0;
+               }
+       }
+}
+
+/**
+ * fiq_fsm_np_tt_contended() - Avoid performing contended non-periodic transfers
+ * @hcd: Pointer to the dwc_otg_hcd struct
+ * @qh: Pointer to the endpoint's queue head
+ *
+ * Certain hub chips don't differentiate between IN and OUT non-periodic pipes
+ * with the same endpoint number. If transfers get completed out of order
+ * (disregarding the direction token) then the hub can lock up
+ * or return erroneous responses.
+ *
+ * Returns 1 if initiating the transfer would cause contention, 0 otherwise.
+ */
+int fiq_fsm_np_tt_contended(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+{
+       int i;
+       struct fiq_channel_state *st;
+       int dev_addr = qh->channel->dev_addr;
+       int ep_num = qh->channel->ep_num;
+       for (i = 0; i < hcd->core_if->core_params->host_channels; i++) {
+               if (i == qh->channel->hc_num)
+                       continue;
+               st = &hcd->fiq_state->channel[i];
+               switch (st->fsm) {
+               case FIQ_NP_SSPLIT_STARTED:
+               case FIQ_NP_SSPLIT_RETRY:
+               case FIQ_NP_SSPLIT_PENDING:
+               case FIQ_NP_OUT_CSPLIT_RETRY:
+               case FIQ_NP_IN_CSPLIT_RETRY:
+                       if (st->hcchar_copy.b.devaddr == dev_addr &&
+                               st->hcchar_copy.b.epnum == ep_num)
+                               return 1;
+                       break;
+               default:
+                       break;
+               }
+       }
+       return 0;
+}
+
+/*
+ * Pushing a periodic request into the queue near the EOF1 point
+ * in a microframe causes erroneous behaviour (frmovrun) interrupt.
+ * Usually, the request goes out on the bus causing a transfer but
+ * the core does not transfer the data to memory.
+ * This guard interval (in number of 60MHz clocks) is required which
+ * must cater for CPU latency between reading the value and enabling
+ * the channel.
+ */
+#define PERIODIC_FRREM_BACKOFF 1000
+
+int fiq_fsm_queue_isoc_transaction(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+{
+       dwc_hc_t *hc = qh->channel;
+       dwc_otg_hc_regs_t *hc_regs = hcd->core_if->host_if->hc_regs[hc->hc_num];
+       dwc_otg_qtd_t *qtd = DWC_CIRCLEQ_FIRST(&qh->qtd_list);
+       int frame;
+       struct fiq_channel_state *st = &hcd->fiq_state->channel[hc->hc_num];
+       int xfer_len, nrpackets;
+       hcdma_data_t hcdma;
+       hfnum_data_t hfnum;
+
+       if (st->fsm != FIQ_PASSTHROUGH)
+               return 0;
+
+       st->nr_errors = 0;
+
+       st->hcchar_copy.d32 = 0;
+       st->hcchar_copy.b.mps = hc->max_packet;
+       st->hcchar_copy.b.epdir = hc->ep_is_in;
+       st->hcchar_copy.b.devaddr = hc->dev_addr;
+       st->hcchar_copy.b.epnum = hc->ep_num;
+       st->hcchar_copy.b.eptype = hc->ep_type;
+
+       st->hcintmsk_copy.b.chhltd = 1;
+
+       frame = dwc_otg_hcd_get_frame_number(hcd);
+       st->hcchar_copy.b.oddfrm = (frame & 0x1) ? 0 : 1;
+
+       st->hcchar_copy.b.lspddev = 0;
+       /* Enable the channel later as a final register write. */
+
+       st->hcsplt_copy.d32 = 0;
+
+       st->hs_isoc_info.iso_desc = (struct dwc_otg_hcd_iso_packet_desc *) &qtd->urb->iso_descs;
+       st->hs_isoc_info.nrframes = qtd->urb->packet_count;
+       /* grab the next DMA address offset from the array */
+       st->hcdma_copy.d32 = qtd->urb->dma;
+       hcdma.d32 = st->hcdma_copy.d32 + st->hs_isoc_info.iso_desc[0].offset;
+
+       /* We need to set multi_count. This is a bit tricky - has to be set per-transaction as
+        * the core needs to be told to send the correct number. Caution: for IN transfers,
+        * this is always set to the maximum size of the endpoint. */
+       xfer_len = st->hs_isoc_info.iso_desc[0].length;
+       nrpackets = (xfer_len + st->hcchar_copy.b.mps - 1) / st->hcchar_copy.b.mps;
+       if (nrpackets == 0)
+               nrpackets = 1;
+       st->hcchar_copy.b.multicnt = nrpackets;
+       st->hctsiz_copy.b.pktcnt = nrpackets;
+
+       /* Initial PID also needs to be set */
+       if (st->hcchar_copy.b.epdir == 0) {
+               st->hctsiz_copy.b.xfersize = xfer_len;
+               switch (st->hcchar_copy.b.multicnt) {
+               case 1:
+                       st->hctsiz_copy.b.pid = DWC_PID_DATA0;
+                       break;
+               case 2:
+               case 3:
+                       st->hctsiz_copy.b.pid = DWC_PID_MDATA;
+                       break;
+               }
+
+       } else {
+               st->hctsiz_copy.b.xfersize = nrpackets * st->hcchar_copy.b.mps;
+               switch (st->hcchar_copy.b.multicnt) {
+               case 1:
+                       st->hctsiz_copy.b.pid = DWC_PID_DATA0;
+                       break;
+               case 2:
+                       st->hctsiz_copy.b.pid = DWC_PID_DATA1;
+                       break;
+               case 3:
+                       st->hctsiz_copy.b.pid = DWC_PID_DATA2;
+                       break;
+               }
+       }
+
+       st->hs_isoc_info.stride = qh->interval;
+       st->uframe_sleeps = 0;
+
+       fiq_print(FIQDBG_INT, hcd->fiq_state, "FSMQ  %01d ", hc->hc_num);
+       fiq_print(FIQDBG_INT, hcd->fiq_state, "%08x", st->hcchar_copy.d32);
+       fiq_print(FIQDBG_INT, hcd->fiq_state, "%08x", st->hctsiz_copy.d32);
+       fiq_print(FIQDBG_INT, hcd->fiq_state, "%08x", st->hcdma_copy.d32);
+       hfnum.d32 = DWC_READ_REG32(&hcd->core_if->host_if->host_global_regs->hfnum);
+       local_fiq_disable();
+       fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+       DWC_WRITE_REG32(&hc_regs->hctsiz, st->hctsiz_copy.d32);
+       DWC_WRITE_REG32(&hc_regs->hcsplt, st->hcsplt_copy.d32);
+       DWC_WRITE_REG32(&hc_regs->hcdma, st->hcdma_copy.d32);
+       DWC_WRITE_REG32(&hc_regs->hcchar, st->hcchar_copy.d32);
+       DWC_WRITE_REG32(&hc_regs->hcintmsk, st->hcintmsk_copy.d32);
+       if (hfnum.b.frrem < PERIODIC_FRREM_BACKOFF) {
+               /* Prevent queueing near EOF1. Bad things happen if a periodic
+                * split transaction is queued very close to EOF. SOF interrupt handler
+                * will wake this channel at the next interrupt.
+                */
+               st->fsm = FIQ_HS_ISOC_SLEEPING;
+               st->uframe_sleeps = 1;
+       } else {
+               st->fsm = FIQ_HS_ISOC_TURBO;
+               st->hcchar_copy.b.chen = 1;
+               DWC_WRITE_REG32(&hc_regs->hcchar, st->hcchar_copy.d32);
+       }
+       mb();
+       st->hcchar_copy.b.chen = 0;
+       fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+       local_fiq_enable();
+       return 0;
+}
+
+
+/**
+ * fiq_fsm_queue_split_transaction() - Set up a host channel and FIQ state
+ * @hcd: Pointer to the dwc_otg_hcd struct
+ * @qh: Pointer to the endpoint's queue head
+ *
+ * This overrides the dwc_otg driver's normal method of queueing a transaction.
+ * Called from dwc_otg_hcd_queue_transactions(), this performs specific setup
+ * for the nominated host channel.
+ *
+ * For periodic transfers, it also peeks at the FIQ state to see if an immediate
+ * start is possible. If not, then the FIQ is left to start the transfer.
+ */
+int fiq_fsm_queue_split_transaction(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+{
+       int start_immediate = 1, i;
+       hfnum_data_t hfnum;
+       dwc_hc_t *hc = qh->channel;
+       dwc_otg_hc_regs_t *hc_regs = hcd->core_if->host_if->hc_regs[hc->hc_num];
+       /* Program HC registers, setup FIQ_state, examine FIQ if periodic, start transfer (not if uframe 5) */
+       int hub_addr, port_addr, frame, uframe;
+       struct fiq_channel_state *st = &hcd->fiq_state->channel[hc->hc_num];
+
+       /*
+        * Non-periodic channel assignments stay in the non_periodic_active queue.
+        * Therefore we get repeatedly called until the FIQ's done processing this channel.
+        */
+       if (qh->channel->xfer_started == 1)
+               return 0;
+
+       if (st->fsm != FIQ_PASSTHROUGH) {
+               pr_warn_ratelimited("%s:%d: Queue called for an active channel\n", __func__, __LINE__);
+               return 0;
+       }
+
+       qh->channel->xfer_started = 1;
+
+       st->nr_errors = 0;
+
+       st->hcchar_copy.d32 = 0;
+       st->hcchar_copy.b.mps = hc->max_packet;
+       st->hcchar_copy.b.epdir = hc->ep_is_in;
+       st->hcchar_copy.b.devaddr = hc->dev_addr;
+       st->hcchar_copy.b.epnum = hc->ep_num;
+       st->hcchar_copy.b.eptype = hc->ep_type;
+       if (hc->ep_type & 0x1) {
+               if (hc->ep_is_in)
+                       st->hcchar_copy.b.multicnt = 3;
+               else
+                       /* Docs say set this to 1, but driver sets to 0! */
+                       st->hcchar_copy.b.multicnt = 0;
+       } else {
+               st->hcchar_copy.b.multicnt = 1;
+               st->hcchar_copy.b.oddfrm = 0;
+       }
+       st->hcchar_copy.b.lspddev = (hc->speed == DWC_OTG_EP_SPEED_LOW) ? 1 : 0;
+       /* Enable the channel later as a final register write. */
+
+       st->hcsplt_copy.d32 = 0;
+       if(qh->do_split) {
+               hcd->fops->hub_info(hcd, DWC_CIRCLEQ_FIRST(&qh->qtd_list)->urb->priv, &hub_addr, &port_addr);
+               st->hcsplt_copy.b.compsplt = 0;
+               st->hcsplt_copy.b.spltena = 1;
+               // XACTPOS is for isoc-out only but needs initialising anyway.
+               st->hcsplt_copy.b.xactpos = ISOC_XACTPOS_ALL;
+               if((qh->ep_type == DWC_OTG_EP_TYPE_ISOC) && (!qh->ep_is_in)) {
+                       /* For packetsize 0 < L < 188, ISOC_XACTPOS_ALL.
+                        * for longer than this, ISOC_XACTPOS_BEGIN and the FIQ
+                        * will update as necessary.
+                        */
+                       if (hc->xfer_len > 188) {
+                               st->hcsplt_copy.b.xactpos = ISOC_XACTPOS_BEGIN;
+                       }
+               }
+               st->hcsplt_copy.b.hubaddr = (uint8_t) hub_addr;
+               st->hcsplt_copy.b.prtaddr = (uint8_t) port_addr;
+               st->hub_addr = hub_addr;
+               st->port_addr = port_addr;
+       }
+
+       st->hctsiz_copy.d32 = 0;
+       st->hctsiz_copy.b.dopng = 0;
+       st->hctsiz_copy.b.pid = hc->data_pid_start;
+
+       if (hc->ep_is_in || (hc->xfer_len > hc->max_packet)) {
+               hc->xfer_len = hc->max_packet;
+       } else if (!hc->ep_is_in && (hc->xfer_len > 188)) {
+               hc->xfer_len = 188;
+       }
+       st->hctsiz_copy.b.xfersize = hc->xfer_len;
+
+       st->hctsiz_copy.b.pktcnt = 1;
+
+       if (hc->ep_type & 0x1) {
+               /*
+                * For potentially multi-packet transfers, must use the DMA bounce buffers. For IN transfers,
+                * the DMA address is the address of the first 188byte slot buffer in the bounce buffer array.
+                * For multi-packet OUT transfers, we need to copy the data into the bounce buffer array so the FIQ can punt
+                * the right address out as necessary. hc->xfer_buff and hc->xfer_len have already been set
+                * in assign_and_init_hc(), but this is for the eventual transaction completion only. The FIQ
+                * must not touch internal driver state.
+                */
+               if(!fiq_fsm_setup_periodic_dma(hcd, st, qh)) {
+                       if (hc->align_buff) {
+                               st->hcdma_copy.d32 = hc->align_buff;
+                       } else {
+                               st->hcdma_copy.d32 = ((unsigned long) hc->xfer_buff & 0xFFFFFFFF);
+                       }
+               }
+       } else {
+               if (hc->align_buff) {
+                       st->hcdma_copy.d32 = hc->align_buff;
+               } else {
+                       st->hcdma_copy.d32 = ((unsigned long) hc->xfer_buff & 0xFFFFFFFF);
+               }
+       }
+       /* The FIQ depends upon no other interrupts being enabled except channel halt.
+        * Fixup channel interrupt mask. */
+       st->hcintmsk_copy.d32 = 0;
+       st->hcintmsk_copy.b.chhltd = 1;
+       st->hcintmsk_copy.b.ahberr = 1;
+
+       /* Hack courtesy of FreeBSD: apparently forcing Interrupt Split transactions
+        * as Control puts the transfer into the non-periodic request queue and the
+        * non-periodic handler in the hub. Makes things lots easier.
+        */
+       if ((fiq_fsm_mask & 0x8) && hc->ep_type == UE_INTERRUPT) {
+               st->hcchar_copy.b.multicnt = 0;
+               st->hcchar_copy.b.oddfrm = 0;
+               st->hcchar_copy.b.eptype = UE_CONTROL;
+               if (hc->align_buff) {
+                       st->hcdma_copy.d32 = hc->align_buff;
+               } else {
+                       st->hcdma_copy.d32 = ((unsigned long) hc->xfer_buff & 0xFFFFFFFF);
+               }
+       }
+       DWC_WRITE_REG32(&hc_regs->hcdma, st->hcdma_copy.d32);
+       DWC_WRITE_REG32(&hc_regs->hctsiz, st->hctsiz_copy.d32);
+       DWC_WRITE_REG32(&hc_regs->hcsplt, st->hcsplt_copy.d32);
+       DWC_WRITE_REG32(&hc_regs->hcchar, st->hcchar_copy.d32);
+       DWC_WRITE_REG32(&hc_regs->hcintmsk, st->hcintmsk_copy.d32);
+
+       local_fiq_disable();
+       fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+
+       if (hc->ep_type & 0x1) {
+               hfnum.d32 = DWC_READ_REG32(&hcd->core_if->host_if->host_global_regs->hfnum);
+               frame = (hfnum.b.frnum & ~0x7) >> 3;
+               uframe = hfnum.b.frnum & 0x7;
+               if (hfnum.b.frrem < PERIODIC_FRREM_BACKOFF) {
+                       /* Prevent queueing near EOF1. Bad things happen if a periodic
+                        * split transaction is queued very close to EOF.
+                        */
+                       start_immediate = 0;
+               } else if (uframe == 5) {
+                       start_immediate = 0;
+               } else if (hc->ep_type == UE_ISOCHRONOUS && !hc->ep_is_in) {
+                       start_immediate = 0;
+               } else if (hc->ep_is_in && fiq_fsm_too_late(hcd->fiq_state, hc->hc_num)) {
+                       start_immediate = 0;
+               } else {
+                       /* Search through all host channels to determine if a transaction
+                        * is currently in progress */
+                       for (i = 0; i < hcd->core_if->core_params->host_channels; i++) {
+                               if (i == hc->hc_num || hcd->fiq_state->channel[i].fsm == FIQ_PASSTHROUGH)
+                                       continue;
+                               switch (hcd->fiq_state->channel[i].fsm) {
+                               /* TT is reserved for channels that are in the middle of a periodic
+                                * split transaction.
+                                */
+                               case FIQ_PER_SSPLIT_STARTED:
+                               case FIQ_PER_CSPLIT_WAIT:
+                               case FIQ_PER_CSPLIT_NYET1:
+                               case FIQ_PER_CSPLIT_POLL:
+                               case FIQ_PER_ISO_OUT_ACTIVE:
+                               case FIQ_PER_ISO_OUT_LAST:
+                                       if (hcd->fiq_state->channel[i].hub_addr == hub_addr &&
+                                                       hcd->fiq_state->channel[i].port_addr == port_addr) {
+                                               start_immediate = 0;
+                                       }
+                                       break;
+                               default:
+                                       break;
+                               }
+                               if (!start_immediate)
+                                       break;
+                       }
+               }
+       }
+       if ((fiq_fsm_mask & 0x8) && hc->ep_type == UE_INTERRUPT)
+               start_immediate = 1;
+
+       fiq_print(FIQDBG_INT, hcd->fiq_state, "FSMQ %01d %01d", hc->hc_num, start_immediate);
+       fiq_print(FIQDBG_INT, hcd->fiq_state, "%08d", hfnum.b.frrem);
+       //fiq_print(FIQDBG_INT, hcd->fiq_state, "H:%02dP:%02d", hub_addr, port_addr);
+       //fiq_print(FIQDBG_INT, hcd->fiq_state, "%08x", st->hctsiz_copy.d32);
+       //fiq_print(FIQDBG_INT, hcd->fiq_state, "%08x", st->hcdma_copy.d32);
+       switch (hc->ep_type) {
+               case UE_CONTROL:
+               case UE_BULK:
+                       if (fiq_fsm_np_tt_contended(hcd, qh)) {
+                               st->fsm = FIQ_NP_SSPLIT_PENDING;
+                               start_immediate = 0;
+                       } else {
+                               st->fsm = FIQ_NP_SSPLIT_STARTED;
+                       }
+                       break;
+               case UE_ISOCHRONOUS:
+                       if (hc->ep_is_in) {
+                               if (start_immediate) {
+                                       st->fsm = FIQ_PER_SSPLIT_STARTED;
+                               } else {
+                                       st->fsm = FIQ_PER_SSPLIT_QUEUED;
+                               }
+                       } else {
+                               if (start_immediate) {
+                                       /* Single-isoc OUT packets don't require FIQ involvement */
+                                       if (st->nrpackets == 1) {
+                                               st->fsm = FIQ_PER_ISO_OUT_LAST;
+                                       } else {
+                                               st->fsm = FIQ_PER_ISO_OUT_ACTIVE;
+                                       }
+                               } else {
+                                       st->fsm = FIQ_PER_ISO_OUT_PENDING;
+                               }
+                       }
+                       break;
+               case UE_INTERRUPT:
+                       if (fiq_fsm_mask & 0x8) {
+                               if (fiq_fsm_np_tt_contended(hcd, qh)) {
+                                       st->fsm = FIQ_NP_SSPLIT_PENDING;
+                                       start_immediate = 0;
+                               } else {
+                                       st->fsm = FIQ_NP_SSPLIT_STARTED;
+                               }
+                       } else if (start_immediate) {
+                                       st->fsm = FIQ_PER_SSPLIT_STARTED;
+                       } else {
+                               st->fsm = FIQ_PER_SSPLIT_QUEUED;
+                       }
+               default:
+                       break;
+       }
+       if (start_immediate) {
+               /* Set the oddfrm bit as close as possible to actual queueing */
+               frame = dwc_otg_hcd_get_frame_number(hcd);
+               st->expected_uframe = (frame + 1) & 0x3FFF;
+               st->hcchar_copy.b.oddfrm = (frame & 0x1) ? 0 : 1;
+               st->hcchar_copy.b.chen = 1;
+               DWC_WRITE_REG32(&hc_regs->hcchar, st->hcchar_copy.d32);
+       }
+       mb();
+       fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+       local_fiq_enable();
+       return 0;
+}
+
+
+/**
+ * This function selects transactions from the HCD transfer schedule and
+ * assigns them to available host channels. It is called from HCD interrupt
+ * handler functions.
+ *
+ * @param hcd The HCD state structure.
+ *
+ * @return The types of new transactions that were assigned to host channels.
+ */
+dwc_otg_transaction_type_e dwc_otg_hcd_select_transactions(dwc_otg_hcd_t * hcd)
+{
+       dwc_list_link_t *qh_ptr;
+       dwc_otg_qh_t *qh;
+       int num_channels;
+       dwc_otg_transaction_type_e ret_val = DWC_OTG_TRANSACTION_NONE;
+
+#ifdef DEBUG_HOST_CHANNELS
+       last_sel_trans_num_per_scheduled = 0;
+       last_sel_trans_num_nonper_scheduled = 0;
+       last_sel_trans_num_avail_hc_at_start = hcd->available_host_channels;
+#endif /* DEBUG_HOST_CHANNELS */
+
+       /* Process entries in the periodic ready list. */
+       qh_ptr = DWC_LIST_FIRST(&hcd->periodic_sched_ready);
+
+       while (qh_ptr != &hcd->periodic_sched_ready &&
+              !DWC_CIRCLEQ_EMPTY(&hcd->free_hc_list)) {
+
+               qh = DWC_LIST_ENTRY(qh_ptr, dwc_otg_qh_t, qh_list_entry);
+
+               if (microframe_schedule) {
+                       // Make sure we leave one channel for non periodic transactions.
+                       if (hcd->available_host_channels <= 1) {
+                               break;
+                       }
+                       hcd->available_host_channels--;
+#ifdef DEBUG_HOST_CHANNELS
+                       last_sel_trans_num_per_scheduled++;
+#endif /* DEBUG_HOST_CHANNELS */
+               }
+               qh = DWC_LIST_ENTRY(qh_ptr, dwc_otg_qh_t, qh_list_entry);
+               assign_and_init_hc(hcd, qh);
+
+               /*
+                * Move the QH from the periodic ready schedule to the
+                * periodic assigned schedule.
+                */
+               qh_ptr = DWC_LIST_NEXT(qh_ptr);
+               DWC_LIST_MOVE_HEAD(&hcd->periodic_sched_assigned,
+                                  &qh->qh_list_entry);
+       }
+
+       /*
+        * Process entries in the inactive portion of the non-periodic
+        * schedule. Some free host channels may not be used if they are
+        * reserved for periodic transfers.
+        */
+       qh_ptr = hcd->non_periodic_sched_inactive.next;
+       num_channels = hcd->core_if->core_params->host_channels;
+       while (qh_ptr != &hcd->non_periodic_sched_inactive &&
+              (microframe_schedule || hcd->non_periodic_channels <
+               num_channels - hcd->periodic_channels) &&
+              !DWC_CIRCLEQ_EMPTY(&hcd->free_hc_list)) {
+
+               qh = DWC_LIST_ENTRY(qh_ptr, dwc_otg_qh_t, qh_list_entry);
+               /*
+                * Check to see if this is a NAK'd retransmit, in which case ignore for retransmission
+                * we hold off on bulk retransmissions to reduce NAK interrupt overhead for full-speed
+                * cheeky devices that just hold off using NAKs
+                */
+               if (fiq_enable && nak_holdoff && qh->do_split) {
+                       if (qh->nak_frame != 0xffff) {
+                               uint16_t next_frame = dwc_frame_num_inc(qh->nak_frame, (qh->ep_type == UE_BULK) ? nak_holdoff : 8);
+                               uint16_t frame = dwc_otg_hcd_get_frame_number(hcd);
+                               if (dwc_frame_num_le(frame, next_frame)) {
+                                       if(dwc_frame_num_le(next_frame, hcd->fiq_state->next_sched_frame)) {
+                                               hcd->fiq_state->next_sched_frame = next_frame;
+                                       }
+                                       qh_ptr = DWC_LIST_NEXT(qh_ptr);
+                                       continue;
+                               } else {
+                                       qh->nak_frame = 0xFFFF;
+                               }
+                       }
+               }
+
+               if (microframe_schedule) {
+                               if (hcd->available_host_channels < 1) {
+                                       break;
+                               }
+                               hcd->available_host_channels--;
+#ifdef DEBUG_HOST_CHANNELS
+                               last_sel_trans_num_nonper_scheduled++;
+#endif /* DEBUG_HOST_CHANNELS */
+               }
+
+               assign_and_init_hc(hcd, qh);
+
+               /*
+                * Move the QH from the non-periodic inactive schedule to the
+                * non-periodic active schedule.
+                */
+               qh_ptr = DWC_LIST_NEXT(qh_ptr);
+               DWC_LIST_MOVE_HEAD(&hcd->non_periodic_sched_active,
+                                  &qh->qh_list_entry);
+
+               if (!microframe_schedule)
+                       hcd->non_periodic_channels++;
+       }
+       /* we moved a non-periodic QH to the active schedule. If the inactive queue is empty,
+        * stop the FIQ from kicking us. We could potentially still have elements here if we
+        * ran out of host channels.
+        */
+       if (fiq_enable) {
+               if (DWC_LIST_EMPTY(&hcd->non_periodic_sched_inactive)) {
+                       hcd->fiq_state->kick_np_queues = 0;
+               } else {
+                       /* For each entry remaining in the NP inactive queue,
+                       * if this a NAK'd retransmit then don't set the kick flag.
+                       */
+                       if(nak_holdoff) {
+                               DWC_LIST_FOREACH(qh_ptr, &hcd->non_periodic_sched_inactive) {
+                                       qh = DWC_LIST_ENTRY(qh_ptr, dwc_otg_qh_t, qh_list_entry);
+                                       if (qh->nak_frame == 0xFFFF) {
+                                               hcd->fiq_state->kick_np_queues = 1;
+                                       }
+                               }
+                       }
+               }
+       }
+       if(!DWC_LIST_EMPTY(&hcd->periodic_sched_assigned))
+               ret_val |= DWC_OTG_TRANSACTION_PERIODIC;
+
+       if(!DWC_LIST_EMPTY(&hcd->non_periodic_sched_active))
+               ret_val |= DWC_OTG_TRANSACTION_NON_PERIODIC;
+
+
+#ifdef DEBUG_HOST_CHANNELS
+       last_sel_trans_num_avail_hc_at_end = hcd->available_host_channels;
+#endif /* DEBUG_HOST_CHANNELS */
+       return ret_val;
+}
+
+/**
+ * Attempts to queue a single transaction request for a host channel
+ * associated with either a periodic or non-periodic transfer. This function
+ * assumes that there is space available in the appropriate request queue. For
+ * an OUT transfer or SETUP transaction in Slave mode, it checks whether space
+ * is available in the appropriate Tx FIFO.
+ *
+ * @param hcd The HCD state structure.
+ * @param hc Host channel descriptor associated with either a periodic or
+ * non-periodic transfer.
+ * @param fifo_dwords_avail Number of DWORDs available in the periodic Tx
+ * FIFO for periodic transfers or the non-periodic Tx FIFO for non-periodic
+ * transfers.
+ *
+ * @return 1 if a request is queued and more requests may be needed to
+ * complete the transfer, 0 if no more requests are required for this
+ * transfer, -1 if there is insufficient space in the Tx FIFO.
+ */
+static int queue_transaction(dwc_otg_hcd_t * hcd,
+                            dwc_hc_t * hc, uint16_t fifo_dwords_avail)
+{
+       int retval;
+
+       if (hcd->core_if->dma_enable) {
+               if (hcd->core_if->dma_desc_enable) {
+                       if (!hc->xfer_started
+                           || (hc->ep_type == DWC_OTG_EP_TYPE_ISOC)) {
+                               dwc_otg_hcd_start_xfer_ddma(hcd, hc->qh);
+                               hc->qh->ping_state = 0;
+                       }
+               } else if (!hc->xfer_started) {
+                       if (fiq_fsm_enable && hc->error_state) {
+                               hcd->fiq_state->channel[hc->hc_num].nr_errors =
+                                       DWC_CIRCLEQ_FIRST(&hc->qh->qtd_list)->error_count;
+                               hcd->fiq_state->channel[hc->hc_num].fsm =
+                                       FIQ_PASSTHROUGH_ERRORSTATE;
+                       }
+                       dwc_otg_hc_start_transfer(hcd->core_if, hc);
+                       hc->qh->ping_state = 0;
+               }
+               retval = 0;
+       } else if (hc->halt_pending) {
+               /* Don't queue a request if the channel has been halted. */
+               retval = 0;
+       } else if (hc->halt_on_queue) {
+               dwc_otg_hc_halt(hcd->core_if, hc, hc->halt_status);
+               retval = 0;
+       } else if (hc->do_ping) {
+               if (!hc->xfer_started) {
+                       dwc_otg_hc_start_transfer(hcd->core_if, hc);
+               }
+               retval = 0;
+       } else if (!hc->ep_is_in || hc->data_pid_start == DWC_OTG_HC_PID_SETUP) {
+               if ((fifo_dwords_avail * 4) >= hc->max_packet) {
+                       if (!hc->xfer_started) {
+                               dwc_otg_hc_start_transfer(hcd->core_if, hc);
+                               retval = 1;
+                       } else {
+                               retval =
+                                   dwc_otg_hc_continue_transfer(hcd->core_if,
+                                                                hc);
+                       }
+               } else {
+                       retval = -1;
+               }
+       } else {
+               if (!hc->xfer_started) {
+                       dwc_otg_hc_start_transfer(hcd->core_if, hc);
+                       retval = 1;
+               } else {
+                       retval = dwc_otg_hc_continue_transfer(hcd->core_if, hc);
+               }
+       }
+
+       return retval;
+}
+
+/**
+ * Processes periodic channels for the next frame and queues transactions for
+ * these channels to the DWC_otg controller. After queueing transactions, the
+ * Periodic Tx FIFO Empty interrupt is enabled if there are more transactions
+ * to queue as Periodic Tx FIFO or request queue space becomes available.
+ * Otherwise, the Periodic Tx FIFO Empty interrupt is disabled.
+ */
+static void process_periodic_channels(dwc_otg_hcd_t * hcd)
+{
+       hptxsts_data_t tx_status;
+       dwc_list_link_t *qh_ptr;
+       dwc_otg_qh_t *qh;
+       int status = 0;
+       int no_queue_space = 0;
+       int no_fifo_space = 0;
+
+       dwc_otg_host_global_regs_t *host_regs;
+       host_regs = hcd->core_if->host_if->host_global_regs;
+
+       DWC_DEBUGPL(DBG_HCDV, "Queue periodic transactions\n");
+#ifdef DEBUG
+       tx_status.d32 = DWC_READ_REG32(&host_regs->hptxsts);
+       DWC_DEBUGPL(DBG_HCDV,
+                   "  P Tx Req Queue Space Avail (before queue): %d\n",
+                   tx_status.b.ptxqspcavail);
+       DWC_DEBUGPL(DBG_HCDV, "  P Tx FIFO Space Avail (before queue): %d\n",
+                   tx_status.b.ptxfspcavail);
+#endif
+
+       qh_ptr = hcd->periodic_sched_assigned.next;
+       while (qh_ptr != &hcd->periodic_sched_assigned) {
+               tx_status.d32 = DWC_READ_REG32(&host_regs->hptxsts);
+               if (tx_status.b.ptxqspcavail == 0) {
+                       no_queue_space = 1;
+                       break;
+               }
+
+               qh = DWC_LIST_ENTRY(qh_ptr, dwc_otg_qh_t, qh_list_entry);
+
+               // Do not send a split start transaction any later than frame .6
+               // Note, we have to schedule a periodic in .5 to make it go in .6
+               if(fiq_fsm_enable && qh->do_split && ((dwc_otg_hcd_get_frame_number(hcd) + 1) & 7) > 6)
+               {
+                       qh_ptr = qh_ptr->next;
+                       hcd->fiq_state->next_sched_frame = dwc_otg_hcd_get_frame_number(hcd) | 7;
+                       continue;
+               }
+
+               if (fiq_fsm_enable && fiq_fsm_transaction_suitable(hcd, qh)) {
+                       if (qh->do_split)
+                               fiq_fsm_queue_split_transaction(hcd, qh);
+                       else
+                               fiq_fsm_queue_isoc_transaction(hcd, qh);
+               } else {
+
+                       /*
+                        * Set a flag if we're queueing high-bandwidth in slave mode.
+                        * The flag prevents any halts to get into the request queue in
+                        * the middle of multiple high-bandwidth packets getting queued.
+                        */
+                       if (!hcd->core_if->dma_enable && qh->channel->multi_count > 1) {
+                               hcd->core_if->queuing_high_bandwidth = 1;
+                       }
+                       status = queue_transaction(hcd, qh->channel,
+                                                       tx_status.b.ptxfspcavail);
+                       if (status < 0) {
+                               no_fifo_space = 1;
+                               break;
+                       }
+               }
+
+               /*
+                * In Slave mode, stay on the current transfer until there is
+                * nothing more to do or the high-bandwidth request count is
+                * reached. In DMA mode, only need to queue one request. The
+                * controller automatically handles multiple packets for
+                * high-bandwidth transfers.
+                */
+               if (hcd->core_if->dma_enable || status == 0 ||
+                   qh->channel->requests == qh->channel->multi_count) {
+                       qh_ptr = qh_ptr->next;
+                       /*
+                        * Move the QH from the periodic assigned schedule to
+                        * the periodic queued schedule.
+                        */
+                       DWC_LIST_MOVE_HEAD(&hcd->periodic_sched_queued,
+                                          &qh->qh_list_entry);
+
+                       /* done queuing high bandwidth */
+                       hcd->core_if->queuing_high_bandwidth = 0;
+               }
+       }
+
+       if (!hcd->core_if->dma_enable) {
+               dwc_otg_core_global_regs_t *global_regs;
+               gintmsk_data_t intr_mask = {.d32 = 0 };
+
+               global_regs = hcd->core_if->core_global_regs;
+               intr_mask.b.ptxfempty = 1;
+#ifdef DEBUG
+               tx_status.d32 = DWC_READ_REG32(&host_regs->hptxsts);
+               DWC_DEBUGPL(DBG_HCDV,
+                           "  P Tx Req Queue Space Avail (after queue): %d\n",
+                           tx_status.b.ptxqspcavail);
+               DWC_DEBUGPL(DBG_HCDV,
+                           "  P Tx FIFO Space Avail (after queue): %d\n",
+                           tx_status.b.ptxfspcavail);
+#endif
+               if (!DWC_LIST_EMPTY(&hcd->periodic_sched_assigned) ||
+                   no_queue_space || no_fifo_space) {
+                       /*
+                        * May need to queue more transactions as the request
+                        * queue or Tx FIFO empties. Enable the periodic Tx
+                        * FIFO empty interrupt. (Always use the half-empty
+                        * level to ensure that new requests are loaded as
+                        * soon as possible.)
+                        */
+                       DWC_MODIFY_REG32(&global_regs->gintmsk, 0,
+                                        intr_mask.d32);
+               } else {
+                       /*
+                        * Disable the Tx FIFO empty interrupt since there are
+                        * no more transactions that need to be queued right
+                        * now. This function is called from interrupt
+                        * handlers to queue more transactions as transfer
+                        * states change.
+                        */
+                       DWC_MODIFY_REG32(&global_regs->gintmsk, intr_mask.d32,
+                                        0);
+               }
+       }
+}
+
+/**
+ * Processes active non-periodic channels and queues transactions for these
+ * channels to the DWC_otg controller. After queueing transactions, the NP Tx
+ * FIFO Empty interrupt is enabled if there are more transactions to queue as
+ * NP Tx FIFO or request queue space becomes available. Otherwise, the NP Tx
+ * FIFO Empty interrupt is disabled.
+ */
+static void process_non_periodic_channels(dwc_otg_hcd_t * hcd)
+{
+       gnptxsts_data_t tx_status;
+       dwc_list_link_t *orig_qh_ptr;
+       dwc_otg_qh_t *qh;
+       int status;
+       int no_queue_space = 0;
+       int no_fifo_space = 0;
+       int more_to_do = 0;
+
+       dwc_otg_core_global_regs_t *global_regs =
+           hcd->core_if->core_global_regs;
+
+       DWC_DEBUGPL(DBG_HCDV, "Queue non-periodic transactions\n");
+#ifdef DEBUG
+       tx_status.d32 = DWC_READ_REG32(&global_regs->gnptxsts);
+       DWC_DEBUGPL(DBG_HCDV,
+                   "  NP Tx Req Queue Space Avail (before queue): %d\n",
+                   tx_status.b.nptxqspcavail);
+       DWC_DEBUGPL(DBG_HCDV, "  NP Tx FIFO Space Avail (before queue): %d\n",
+                   tx_status.b.nptxfspcavail);
+#endif
+       /*
+        * Keep track of the starting point. Skip over the start-of-list
+        * entry.
+        */
+       if (hcd->non_periodic_qh_ptr == &hcd->non_periodic_sched_active) {
+               hcd->non_periodic_qh_ptr = hcd->non_periodic_qh_ptr->next;
+       }
+       orig_qh_ptr = hcd->non_periodic_qh_ptr;
+
+       /*
+        * Process once through the active list or until no more space is
+        * available in the request queue or the Tx FIFO.
+        */
+       do {
+               tx_status.d32 = DWC_READ_REG32(&global_regs->gnptxsts);
+               if (!hcd->core_if->dma_enable && tx_status.b.nptxqspcavail == 0) {
+                       no_queue_space = 1;
+                       break;
+               }
+
+               qh = DWC_LIST_ENTRY(hcd->non_periodic_qh_ptr, dwc_otg_qh_t,
+                                   qh_list_entry);
+
+               if(fiq_fsm_enable && fiq_fsm_transaction_suitable(hcd, qh)) {
+                       fiq_fsm_queue_split_transaction(hcd, qh);
+               } else {
+                       status = queue_transaction(hcd, qh->channel,
+                                               tx_status.b.nptxfspcavail);
+
+                       if (status > 0) {
+                               more_to_do = 1;
+                       } else if (status < 0) {
+                               no_fifo_space = 1;
+                               break;
+                       }
+               }
+               /* Advance to next QH, skipping start-of-list entry. */
+               hcd->non_periodic_qh_ptr = hcd->non_periodic_qh_ptr->next;
+               if (hcd->non_periodic_qh_ptr == &hcd->non_periodic_sched_active) {
+                       hcd->non_periodic_qh_ptr =
+                           hcd->non_periodic_qh_ptr->next;
+               }
+
+       } while (hcd->non_periodic_qh_ptr != orig_qh_ptr);
+
+       if (!hcd->core_if->dma_enable) {
+               gintmsk_data_t intr_mask = {.d32 = 0 };
+               intr_mask.b.nptxfempty = 1;
+
+#ifdef DEBUG
+               tx_status.d32 = DWC_READ_REG32(&global_regs->gnptxsts);
+               DWC_DEBUGPL(DBG_HCDV,
+                           "  NP Tx Req Queue Space Avail (after queue): %d\n",
+                           tx_status.b.nptxqspcavail);
+               DWC_DEBUGPL(DBG_HCDV,
+                           "  NP Tx FIFO Space Avail (after queue): %d\n",
+                           tx_status.b.nptxfspcavail);
+#endif
+               if (more_to_do || no_queue_space || no_fifo_space) {
+                       /*
+                        * May need to queue more transactions as the request
+                        * queue or Tx FIFO empties. Enable the non-periodic
+                        * Tx FIFO empty interrupt. (Always use the half-empty
+                        * level to ensure that new requests are loaded as
+                        * soon as possible.)
+                        */
+                       DWC_MODIFY_REG32(&global_regs->gintmsk, 0,
+                                        intr_mask.d32);
+               } else {
+                       /*
+                        * Disable the Tx FIFO empty interrupt since there are
+                        * no more transactions that need to be queued right
+                        * now. This function is called from interrupt
+                        * handlers to queue more transactions as transfer
+                        * states change.
+                        */
+                       DWC_MODIFY_REG32(&global_regs->gintmsk, intr_mask.d32,
+                                        0);
+               }
+       }
+}
+
+/**
+ * This function processes the currently active host channels and queues
+ * transactions for these channels to the DWC_otg controller. It is called
+ * from HCD interrupt handler functions.
+ *
+ * @param hcd The HCD state structure.
+ * @param tr_type The type(s) of transactions to queue (non-periodic,
+ * periodic, or both).
+ */
+void dwc_otg_hcd_queue_transactions(dwc_otg_hcd_t * hcd,
+                                   dwc_otg_transaction_type_e tr_type)
+{
+#ifdef DEBUG_SOF
+       DWC_DEBUGPL(DBG_HCD, "Queue Transactions\n");
+#endif
+       /* Process host channels associated with periodic transfers. */
+       if ((tr_type == DWC_OTG_TRANSACTION_PERIODIC ||
+            tr_type == DWC_OTG_TRANSACTION_ALL) &&
+           !DWC_LIST_EMPTY(&hcd->periodic_sched_assigned)) {
+
+               process_periodic_channels(hcd);
+       }
+
+       /* Process host channels associated with non-periodic transfers. */
+       if (tr_type == DWC_OTG_TRANSACTION_NON_PERIODIC ||
+           tr_type == DWC_OTG_TRANSACTION_ALL) {
+               if (!DWC_LIST_EMPTY(&hcd->non_periodic_sched_active)) {
+                       process_non_periodic_channels(hcd);
+               } else {
+                       /*
+                        * Ensure NP Tx FIFO empty interrupt is disabled when
+                        * there are no non-periodic transfers to process.
+                        */
+                       gintmsk_data_t gintmsk = {.d32 = 0 };
+                       gintmsk.b.nptxfempty = 1;
+
+                       if (fiq_enable) {
+                               local_fiq_disable();
+                               fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+                               DWC_MODIFY_REG32(&hcd->core_if->core_global_regs->gintmsk, gintmsk.d32, 0);
+                               fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+                               local_fiq_enable();
+                       } else {
+                               DWC_MODIFY_REG32(&hcd->core_if->core_global_regs->gintmsk, gintmsk.d32, 0);
+                       }
+               }
+       }
+}
+
+#ifdef DWC_HS_ELECT_TST
+/*
+ * Quick and dirty hack to implement the HS Electrical Test
+ * SINGLE_STEP_GET_DEVICE_DESCRIPTOR feature.
+ *
+ * This code was copied from our userspace app "hset". It sends a
+ * Get Device Descriptor control sequence in two parts, first the
+ * Setup packet by itself, followed some time later by the In and
+ * Ack packets. Rather than trying to figure out how to add this
+ * functionality to the normal driver code, we just hijack the
+ * hardware, using these two function to drive the hardware
+ * directly.
+ */
+
+static dwc_otg_core_global_regs_t *global_regs;
+static dwc_otg_host_global_regs_t *hc_global_regs;
+static dwc_otg_hc_regs_t *hc_regs;
+static uint32_t *data_fifo;
+
+static void do_setup(void)
+{
+       gintsts_data_t gintsts;
+       hctsiz_data_t hctsiz;
+       hcchar_data_t hcchar;
+       haint_data_t haint;
+       hcint_data_t hcint;
+
+       /* Enable HAINTs */
+       DWC_WRITE_REG32(&hc_global_regs->haintmsk, 0x0001);
+
+       /* Enable HCINTs */
+       DWC_WRITE_REG32(&hc_regs->hcintmsk, 0x04a3);
+
+       /* Read GINTSTS */
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /* Read HAINT */
+       haint.d32 = DWC_READ_REG32(&hc_global_regs->haint);
+
+       /* Read HCINT */
+       hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+
+       /* Read HCCHAR */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+       /* Clear HCINT */
+       DWC_WRITE_REG32(&hc_regs->hcint, hcint.d32);
+
+       /* Clear HAINT */
+       DWC_WRITE_REG32(&hc_global_regs->haint, haint.d32);
+
+       /* Clear GINTSTS */
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       /* Read GINTSTS */
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /*
+        * Send Setup packet (Get Device Descriptor)
+        */
+
+       /* Make sure channel is disabled */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       if (hcchar.b.chen) {
+               hcchar.b.chdis = 1;
+//              hcchar.b.chen = 1;
+               DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+               //sleep(1);
+               dwc_mdelay(1000);
+
+               /* Read GINTSTS */
+               gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+               /* Read HAINT */
+               haint.d32 = DWC_READ_REG32(&hc_global_regs->haint);
+
+               /* Read HCINT */
+               hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+
+               /* Read HCCHAR */
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+               /* Clear HCINT */
+               DWC_WRITE_REG32(&hc_regs->hcint, hcint.d32);
+
+               /* Clear HAINT */
+               DWC_WRITE_REG32(&hc_global_regs->haint, haint.d32);
+
+               /* Clear GINTSTS */
+               DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       }
+
+       /* Set HCTSIZ */
+       hctsiz.d32 = 0;
+       hctsiz.b.xfersize = 8;
+       hctsiz.b.pktcnt = 1;
+       hctsiz.b.pid = DWC_OTG_HC_PID_SETUP;
+       DWC_WRITE_REG32(&hc_regs->hctsiz, hctsiz.d32);
+
+       /* Set HCCHAR */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       hcchar.b.eptype = DWC_OTG_EP_TYPE_CONTROL;
+       hcchar.b.epdir = 0;
+       hcchar.b.epnum = 0;
+       hcchar.b.mps = 8;
+       hcchar.b.chen = 1;
+       DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+
+       /* Fill FIFO with Setup data for Get Device Descriptor */
+       data_fifo = (uint32_t *) ((char *)global_regs + 0x1000);
+       DWC_WRITE_REG32(data_fifo++, 0x01000680);
+       DWC_WRITE_REG32(data_fifo++, 0x00080000);
+
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /* Wait for host channel interrupt */
+       do {
+               gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+       } while (gintsts.b.hcintr == 0);
+
+       /* Disable HCINTs */
+       DWC_WRITE_REG32(&hc_regs->hcintmsk, 0x0000);
+
+       /* Disable HAINTs */
+       DWC_WRITE_REG32(&hc_global_regs->haintmsk, 0x0000);
+
+       /* Read HAINT */
+       haint.d32 = DWC_READ_REG32(&hc_global_regs->haint);
+
+       /* Read HCINT */
+       hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+
+       /* Read HCCHAR */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+       /* Clear HCINT */
+       DWC_WRITE_REG32(&hc_regs->hcint, hcint.d32);
+
+       /* Clear HAINT */
+       DWC_WRITE_REG32(&hc_global_regs->haint, haint.d32);
+
+       /* Clear GINTSTS */
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       /* Read GINTSTS */
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+}
+
+static void do_in_ack(void)
+{
+       gintsts_data_t gintsts;
+       hctsiz_data_t hctsiz;
+       hcchar_data_t hcchar;
+       haint_data_t haint;
+       hcint_data_t hcint;
+       host_grxsts_data_t grxsts;
+
+       /* Enable HAINTs */
+       DWC_WRITE_REG32(&hc_global_regs->haintmsk, 0x0001);
+
+       /* Enable HCINTs */
+       DWC_WRITE_REG32(&hc_regs->hcintmsk, 0x04a3);
+
+       /* Read GINTSTS */
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /* Read HAINT */
+       haint.d32 = DWC_READ_REG32(&hc_global_regs->haint);
+
+       /* Read HCINT */
+       hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+
+       /* Read HCCHAR */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+       /* Clear HCINT */
+       DWC_WRITE_REG32(&hc_regs->hcint, hcint.d32);
+
+       /* Clear HAINT */
+       DWC_WRITE_REG32(&hc_global_regs->haint, haint.d32);
+
+       /* Clear GINTSTS */
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       /* Read GINTSTS */
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /*
+        * Receive Control In packet
+        */
+
+       /* Make sure channel is disabled */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       if (hcchar.b.chen) {
+               hcchar.b.chdis = 1;
+               hcchar.b.chen = 1;
+               DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+               //sleep(1);
+               dwc_mdelay(1000);
+
+               /* Read GINTSTS */
+               gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+               /* Read HAINT */
+               haint.d32 = DWC_READ_REG32(&hc_global_regs->haint);
+
+               /* Read HCINT */
+               hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+
+               /* Read HCCHAR */
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+               /* Clear HCINT */
+               DWC_WRITE_REG32(&hc_regs->hcint, hcint.d32);
+
+               /* Clear HAINT */
+               DWC_WRITE_REG32(&hc_global_regs->haint, haint.d32);
+
+               /* Clear GINTSTS */
+               DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       }
+
+       /* Set HCTSIZ */
+       hctsiz.d32 = 0;
+       hctsiz.b.xfersize = 8;
+       hctsiz.b.pktcnt = 1;
+       hctsiz.b.pid = DWC_OTG_HC_PID_DATA1;
+       DWC_WRITE_REG32(&hc_regs->hctsiz, hctsiz.d32);
+
+       /* Set HCCHAR */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       hcchar.b.eptype = DWC_OTG_EP_TYPE_CONTROL;
+       hcchar.b.epdir = 1;
+       hcchar.b.epnum = 0;
+       hcchar.b.mps = 8;
+       hcchar.b.chen = 1;
+       DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /* Wait for receive status queue interrupt */
+       do {
+               gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+       } while (gintsts.b.rxstsqlvl == 0);
+
+       /* Read RXSTS */
+       grxsts.d32 = DWC_READ_REG32(&global_regs->grxstsp);
+
+       /* Clear RXSTSQLVL in GINTSTS */
+       gintsts.d32 = 0;
+       gintsts.b.rxstsqlvl = 1;
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       switch (grxsts.b.pktsts) {
+       case DWC_GRXSTS_PKTSTS_IN:
+               /* Read the data into the host buffer */
+               if (grxsts.b.bcnt > 0) {
+                       int i;
+                       int word_count = (grxsts.b.bcnt + 3) / 4;
+
+                       data_fifo = (uint32_t *) ((char *)global_regs + 0x1000);
+
+                       for (i = 0; i < word_count; i++) {
+                               (void)DWC_READ_REG32(data_fifo++);
+                       }
+               }
+               break;
+
+       default:
+               break;
+       }
+
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /* Wait for receive status queue interrupt */
+       do {
+               gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+       } while (gintsts.b.rxstsqlvl == 0);
+
+       /* Read RXSTS */
+       grxsts.d32 = DWC_READ_REG32(&global_regs->grxstsp);
+
+       /* Clear RXSTSQLVL in GINTSTS */
+       gintsts.d32 = 0;
+       gintsts.b.rxstsqlvl = 1;
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       switch (grxsts.b.pktsts) {
+       case DWC_GRXSTS_PKTSTS_IN_XFER_COMP:
+               break;
+
+       default:
+               break;
+       }
+
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /* Wait for host channel interrupt */
+       do {
+               gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+       } while (gintsts.b.hcintr == 0);
+
+       /* Read HAINT */
+       haint.d32 = DWC_READ_REG32(&hc_global_regs->haint);
+
+       /* Read HCINT */
+       hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+
+       /* Read HCCHAR */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+       /* Clear HCINT */
+       DWC_WRITE_REG32(&hc_regs->hcint, hcint.d32);
+
+       /* Clear HAINT */
+       DWC_WRITE_REG32(&hc_global_regs->haint, haint.d32);
+
+       /* Clear GINTSTS */
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       /* Read GINTSTS */
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+//      usleep(100000);
+//      mdelay(100);
+       dwc_mdelay(1);
+
+       /*
+        * Send handshake packet
+        */
+
+       /* Read HAINT */
+       haint.d32 = DWC_READ_REG32(&hc_global_regs->haint);
+
+       /* Read HCINT */
+       hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+
+       /* Read HCCHAR */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+       /* Clear HCINT */
+       DWC_WRITE_REG32(&hc_regs->hcint, hcint.d32);
+
+       /* Clear HAINT */
+       DWC_WRITE_REG32(&hc_global_regs->haint, haint.d32);
+
+       /* Clear GINTSTS */
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       /* Read GINTSTS */
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /* Make sure channel is disabled */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       if (hcchar.b.chen) {
+               hcchar.b.chdis = 1;
+               hcchar.b.chen = 1;
+               DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+               //sleep(1);
+               dwc_mdelay(1000);
+
+               /* Read GINTSTS */
+               gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+               /* Read HAINT */
+               haint.d32 = DWC_READ_REG32(&hc_global_regs->haint);
+
+               /* Read HCINT */
+               hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+
+               /* Read HCCHAR */
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+               /* Clear HCINT */
+               DWC_WRITE_REG32(&hc_regs->hcint, hcint.d32);
+
+               /* Clear HAINT */
+               DWC_WRITE_REG32(&hc_global_regs->haint, haint.d32);
+
+               /* Clear GINTSTS */
+               DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       }
+
+       /* Set HCTSIZ */
+       hctsiz.d32 = 0;
+       hctsiz.b.xfersize = 0;
+       hctsiz.b.pktcnt = 1;
+       hctsiz.b.pid = DWC_OTG_HC_PID_DATA1;
+       DWC_WRITE_REG32(&hc_regs->hctsiz, hctsiz.d32);
+
+       /* Set HCCHAR */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       hcchar.b.eptype = DWC_OTG_EP_TYPE_CONTROL;
+       hcchar.b.epdir = 0;
+       hcchar.b.epnum = 0;
+       hcchar.b.mps = 8;
+       hcchar.b.chen = 1;
+       DWC_WRITE_REG32(&hc_regs->hcchar, hcchar.d32);
+
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+
+       /* Wait for host channel interrupt */
+       do {
+               gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+       } while (gintsts.b.hcintr == 0);
+
+       /* Disable HCINTs */
+       DWC_WRITE_REG32(&hc_regs->hcintmsk, 0x0000);
+
+       /* Disable HAINTs */
+       DWC_WRITE_REG32(&hc_global_regs->haintmsk, 0x0000);
+
+       /* Read HAINT */
+       haint.d32 = DWC_READ_REG32(&hc_global_regs->haint);
+
+       /* Read HCINT */
+       hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+
+       /* Read HCCHAR */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+
+       /* Clear HCINT */
+       DWC_WRITE_REG32(&hc_regs->hcint, hcint.d32);
+
+       /* Clear HAINT */
+       DWC_WRITE_REG32(&hc_global_regs->haint, haint.d32);
+
+       /* Clear GINTSTS */
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       /* Read GINTSTS */
+       gintsts.d32 = DWC_READ_REG32(&global_regs->gintsts);
+}
+#endif
+
+/** Handles hub class-specific requests. */
+int dwc_otg_hcd_hub_control(dwc_otg_hcd_t * dwc_otg_hcd,
+                           uint16_t typeReq,
+                           uint16_t wValue,
+                           uint16_t wIndex, uint8_t * buf, uint16_t wLength)
+{
+       int retval = 0;
+
+       dwc_otg_core_if_t *core_if = dwc_otg_hcd->core_if;
+       usb_hub_descriptor_t *hub_desc;
+       hprt0_data_t hprt0 = {.d32 = 0 };
+
+       uint32_t port_status;
+
+       switch (typeReq) {
+       case UCR_CLEAR_HUB_FEATURE:
+               DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                           "ClearHubFeature 0x%x\n", wValue);
+               switch (wValue) {
+               case UHF_C_HUB_LOCAL_POWER:
+               case UHF_C_HUB_OVER_CURRENT:
+                       /* Nothing required here */
+                       break;
+               default:
+                       retval = -DWC_E_INVALID;
+                       DWC_ERROR("DWC OTG HCD - "
+                                 "ClearHubFeature request %xh unknown\n",
+                                 wValue);
+               }
+               break;
+       case UCR_CLEAR_PORT_FEATURE:
+#ifdef CONFIG_USB_DWC_OTG_LPM
+               if (wValue != UHF_PORT_L1)
+#endif
+                       if (!wIndex || wIndex > 1)
+                               goto error;
+
+               switch (wValue) {
+               case UHF_PORT_ENABLE:
+                       DWC_DEBUGPL(DBG_ANY, "DWC OTG HCD HUB CONTROL - "
+                                   "ClearPortFeature USB_PORT_FEAT_ENABLE\n");
+                       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                       hprt0.b.prtena = 1;
+                       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+                       break;
+               case UHF_PORT_SUSPEND:
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "ClearPortFeature USB_PORT_FEAT_SUSPEND\n");
+
+                       if (core_if->power_down == 2) {
+                               dwc_otg_host_hibernation_restore(core_if, 0, 0);
+                       } else {
+                               DWC_WRITE_REG32(core_if->pcgcctl, 0);
+                               dwc_mdelay(5);
+
+                               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                               hprt0.b.prtres = 1;
+                               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+                               hprt0.b.prtsusp = 0;
+                               /* Clear Resume bit */
+                               dwc_mdelay(100);
+                               hprt0.b.prtres = 0;
+                               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+                       }
+                       break;
+#ifdef CONFIG_USB_DWC_OTG_LPM
+               case UHF_PORT_L1:
+                       {
+                               pcgcctl_data_t pcgcctl = {.d32 = 0 };
+                               glpmcfg_data_t lpmcfg = {.d32 = 0 };
+
+                               lpmcfg.d32 =
+                                   DWC_READ_REG32(&core_if->
+                                                  core_global_regs->glpmcfg);
+                               lpmcfg.b.en_utmi_sleep = 0;
+                               lpmcfg.b.hird_thres &= (~(1 << 4));
+                               lpmcfg.b.prt_sleep_sts = 1;
+                               DWC_WRITE_REG32(&core_if->
+                                               core_global_regs->glpmcfg,
+                                               lpmcfg.d32);
+
+                               /* Clear Enbl_L1Gating bit. */
+                               pcgcctl.b.enbl_sleep_gating = 1;
+                               DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32,
+                                                0);
+
+                               dwc_mdelay(5);
+
+                               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                               hprt0.b.prtres = 1;
+                               DWC_WRITE_REG32(core_if->host_if->hprt0,
+                                               hprt0.d32);
+                               /* This bit will be cleared in wakeup interrupt handle */
+                               break;
+                       }
+#endif
+               case UHF_PORT_POWER:
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "ClearPortFeature USB_PORT_FEAT_POWER\n");
+                       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                       hprt0.b.prtpwr = 0;
+                       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+                       break;
+               case UHF_PORT_INDICATOR:
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "ClearPortFeature USB_PORT_FEAT_INDICATOR\n");
+                       /* Port inidicator not supported */
+                       break;
+               case UHF_C_PORT_CONNECTION:
+                       /* Clears drivers internal connect status change
+                        * flag */
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "ClearPortFeature USB_PORT_FEAT_C_CONNECTION\n");
+                       dwc_otg_hcd->flags.b.port_connect_status_change = 0;
+                       break;
+               case UHF_C_PORT_RESET:
+                       /* Clears the driver's internal Port Reset Change
+                        * flag */
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "ClearPortFeature USB_PORT_FEAT_C_RESET\n");
+                       dwc_otg_hcd->flags.b.port_reset_change = 0;
+                       break;
+               case UHF_C_PORT_ENABLE:
+                       /* Clears the driver's internal Port
+                        * Enable/Disable Change flag */
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "ClearPortFeature USB_PORT_FEAT_C_ENABLE\n");
+                       dwc_otg_hcd->flags.b.port_enable_change = 0;
+                       break;
+               case UHF_C_PORT_SUSPEND:
+                       /* Clears the driver's internal Port Suspend
+                        * Change flag, which is set when resume signaling on
+                        * the host port is complete */
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "ClearPortFeature USB_PORT_FEAT_C_SUSPEND\n");
+                       dwc_otg_hcd->flags.b.port_suspend_change = 0;
+                       break;
+#ifdef CONFIG_USB_DWC_OTG_LPM
+               case UHF_C_PORT_L1:
+                       dwc_otg_hcd->flags.b.port_l1_change = 0;
+                       break;
+#endif
+               case UHF_C_PORT_OVER_CURRENT:
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "ClearPortFeature USB_PORT_FEAT_C_OVER_CURRENT\n");
+                       dwc_otg_hcd->flags.b.port_over_current_change = 0;
+                       break;
+               default:
+                       retval = -DWC_E_INVALID;
+                       DWC_ERROR("DWC OTG HCD - "
+                                 "ClearPortFeature request %xh "
+                                 "unknown or unsupported\n", wValue);
+               }
+               break;
+       case UCR_GET_HUB_DESCRIPTOR:
+               DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                           "GetHubDescriptor\n");
+               hub_desc = (usb_hub_descriptor_t *) buf;
+               hub_desc->bDescLength = 9;
+               hub_desc->bDescriptorType = 0x29;
+               hub_desc->bNbrPorts = 1;
+               USETW(hub_desc->wHubCharacteristics, 0x08);
+               hub_desc->bPwrOn2PwrGood = 1;
+               hub_desc->bHubContrCurrent = 0;
+               hub_desc->DeviceRemovable[0] = 0;
+               hub_desc->DeviceRemovable[1] = 0xff;
+               break;
+       case UCR_GET_HUB_STATUS:
+               DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                           "GetHubStatus\n");
+               DWC_MEMSET(buf, 0, 4);
+               break;
+       case UCR_GET_PORT_STATUS:
+               DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                           "GetPortStatus wIndex = 0x%04x FLAGS=0x%08x\n",
+                           wIndex, dwc_otg_hcd->flags.d32);
+               if (!wIndex || wIndex > 1)
+                       goto error;
+
+               port_status = 0;
+
+               if (dwc_otg_hcd->flags.b.port_connect_status_change)
+                       port_status |= (1 << UHF_C_PORT_CONNECTION);
+
+               if (dwc_otg_hcd->flags.b.port_enable_change)
+                       port_status |= (1 << UHF_C_PORT_ENABLE);
+
+               if (dwc_otg_hcd->flags.b.port_suspend_change)
+                       port_status |= (1 << UHF_C_PORT_SUSPEND);
+
+               if (dwc_otg_hcd->flags.b.port_l1_change)
+                       port_status |= (1 << UHF_C_PORT_L1);
+
+               if (dwc_otg_hcd->flags.b.port_reset_change) {
+                       port_status |= (1 << UHF_C_PORT_RESET);
+               }
+
+               if (dwc_otg_hcd->flags.b.port_over_current_change) {
+                       DWC_WARN("Overcurrent change detected\n");
+                       port_status |= (1 << UHF_C_PORT_OVER_CURRENT);
+               }
+
+               if (!dwc_otg_hcd->flags.b.port_connect_status) {
+                       /*
+                        * The port is disconnected, which means the core is
+                        * either in device mode or it soon will be. Just
+                        * return 0's for the remainder of the port status
+                        * since the port register can't be read if the core
+                        * is in device mode.
+                        */
+                       *((__le32 *) buf) = dwc_cpu_to_le32(&port_status);
+                       break;
+               }
+
+               hprt0.d32 = DWC_READ_REG32(core_if->host_if->hprt0);
+               DWC_DEBUGPL(DBG_HCDV, "  HPRT0: 0x%08x\n", hprt0.d32);
+
+               if (hprt0.b.prtconnsts)
+                       port_status |= (1 << UHF_PORT_CONNECTION);
+
+               if (hprt0.b.prtena)
+                       port_status |= (1 << UHF_PORT_ENABLE);
+
+               if (hprt0.b.prtsusp)
+                       port_status |= (1 << UHF_PORT_SUSPEND);
+
+               if (hprt0.b.prtovrcurract)
+                       port_status |= (1 << UHF_PORT_OVER_CURRENT);
+
+               if (hprt0.b.prtrst)
+                       port_status |= (1 << UHF_PORT_RESET);
+
+               if (hprt0.b.prtpwr)
+                       port_status |= (1 << UHF_PORT_POWER);
+
+               if (hprt0.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED)
+                       port_status |= (1 << UHF_PORT_HIGH_SPEED);
+               else if (hprt0.b.prtspd == DWC_HPRT0_PRTSPD_LOW_SPEED)
+                       port_status |= (1 << UHF_PORT_LOW_SPEED);
+
+               if (hprt0.b.prttstctl)
+                       port_status |= (1 << UHF_PORT_TEST);
+               if (dwc_otg_get_lpm_portsleepstatus(dwc_otg_hcd->core_if)) {
+                       port_status |= (1 << UHF_PORT_L1);
+               }
+               /*
+                  For Synopsys HW emulation of Power down wkup_control asserts the
+                  hreset_n and prst_n on suspned. This causes the HPRT0 to be zero.
+                  We intentionally tell the software that port is in L2Suspend state.
+                  Only for STE.
+               */
+               if ((core_if->power_down == 2)
+                   && (core_if->hibernation_suspend == 1)) {
+                       port_status |= (1 << UHF_PORT_SUSPEND);
+               }
+               /* USB_PORT_FEAT_INDICATOR unsupported always 0 */
+
+               *((__le32 *) buf) = dwc_cpu_to_le32(&port_status);
+
+               break;
+       case UCR_SET_HUB_FEATURE:
+               DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                           "SetHubFeature\n");
+               /* No HUB features supported */
+               break;
+       case UCR_SET_PORT_FEATURE:
+               if (wValue != UHF_PORT_TEST && (!wIndex || wIndex > 1))
+                       goto error;
+
+               if (!dwc_otg_hcd->flags.b.port_connect_status) {
+                       /*
+                        * The port is disconnected, which means the core is
+                        * either in device mode or it soon will be. Just
+                        * return without doing anything since the port
+                        * register can't be written if the core is in device
+                        * mode.
+                        */
+                       break;
+               }
+
+               switch (wValue) {
+               case UHF_PORT_SUSPEND:
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "SetPortFeature - USB_PORT_FEAT_SUSPEND\n");
+                       if (dwc_otg_hcd_otg_port(dwc_otg_hcd) != wIndex) {
+                               goto error;
+                       }
+                       if (core_if->power_down == 2) {
+                               int timeout = 300;
+                               dwc_irqflags_t flags;
+                               pcgcctl_data_t pcgcctl = {.d32 = 0 };
+                               gpwrdn_data_t gpwrdn = {.d32 = 0 };
+                               gusbcfg_data_t gusbcfg = {.d32 = 0 };
+#ifdef DWC_DEV_SRPCAP
+                               int32_t otg_cap_param = core_if->core_params->otg_cap;
+#endif
+                               DWC_PRINTF("Preparing for complete power-off\n");
+
+                               /* Save registers before hibernation */
+                               dwc_otg_save_global_regs(core_if);
+                               dwc_otg_save_host_regs(core_if);
+
+                               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                               hprt0.b.prtsusp = 1;
+                               hprt0.b.prtena = 0;
+                               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+                               /* Spin hprt0.b.prtsusp to became 1 */
+                               do {
+                                       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                                       if (hprt0.b.prtsusp) {
+                                               break;
+                                       }
+                                       dwc_mdelay(1);
+                               } while (--timeout);
+                               if (!timeout) {
+                                       DWC_WARN("Suspend wasn't genereted\n");
+                               }
+                               dwc_udelay(10);
+
+                               /*
+                                * We need to disable interrupts to prevent servicing of any IRQ
+                                * during going to hibernation
+                                */
+                               DWC_SPINLOCK_IRQSAVE(dwc_otg_hcd->lock, &flags);
+                               core_if->lx_state = DWC_OTG_L2;
+#ifdef DWC_DEV_SRPCAP
+                               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                               hprt0.b.prtpwr = 0;
+                               hprt0.b.prtena = 0;
+                               DWC_WRITE_REG32(core_if->host_if->hprt0,
+                                               hprt0.d32);
+#endif
+                               gusbcfg.d32 =
+                                   DWC_READ_REG32(&core_if->core_global_regs->
+                                                  gusbcfg);
+                               if (gusbcfg.b.ulpi_utmi_sel == 1) {
+                                       /* ULPI interface */
+                                       /* Suspend the Phy Clock */
+                                       pcgcctl.d32 = 0;
+                                       pcgcctl.b.stoppclk = 1;
+                                       DWC_MODIFY_REG32(core_if->pcgcctl, 0,
+                                                        pcgcctl.d32);
+                                       dwc_udelay(10);
+                                       gpwrdn.b.pmuactv = 1;
+                                       DWC_MODIFY_REG32(&core_if->
+                                                        core_global_regs->
+                                                        gpwrdn, 0, gpwrdn.d32);
+                               } else {
+                                       /* UTMI+ Interface */
+                                       gpwrdn.b.pmuactv = 1;
+                                       DWC_MODIFY_REG32(&core_if->
+                                                        core_global_regs->
+                                                        gpwrdn, 0, gpwrdn.d32);
+                                       dwc_udelay(10);
+                                       pcgcctl.b.stoppclk = 1;
+                                       DWC_MODIFY_REG32(core_if->pcgcctl, 0, pcgcctl.d32);
+                                       dwc_udelay(10);
+                               }
+#ifdef DWC_DEV_SRPCAP
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.dis_vbus = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+#endif
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pmuintsel = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                               dwc_udelay(10);
+
+                               gpwrdn.d32 = 0;
+#ifdef DWC_DEV_SRPCAP
+                               gpwrdn.b.srp_det_msk = 1;
+#endif
+                               gpwrdn.b.disconn_det_msk = 1;
+                               gpwrdn.b.lnstchng_msk = 1;
+                               gpwrdn.b.sts_chngint_msk = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                               dwc_udelay(10);
+
+                               /* Enable Power Down Clamp and all interrupts in GPWRDN */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pwrdnclmp = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+                               dwc_udelay(10);
+
+                               /* Switch off VDD */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pwrdnswtch = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+
+#ifdef DWC_DEV_SRPCAP
+                               if (otg_cap_param == DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE)
+                               {
+                                       core_if->pwron_timer_started = 1;
+                                       DWC_TIMER_SCHEDULE(core_if->pwron_timer, 6000 /* 6 secs */ );
+                               }
+#endif
+                               /* Save gpwrdn register for further usage if stschng interrupt */
+                               core_if->gr_backup->gpwrdn_local =
+                                               DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
+
+                               /* Set flag to indicate that we are in hibernation */
+                               core_if->hibernation_suspend = 1;
+                               DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock,flags);
+
+                               DWC_PRINTF("Host hibernation completed\n");
+                               // Exit from case statement
+                               break;
+
+                       }
+                       if (dwc_otg_hcd_otg_port(dwc_otg_hcd) == wIndex &&
+                           dwc_otg_hcd->fops->get_b_hnp_enable(dwc_otg_hcd)) {
+                               gotgctl_data_t gotgctl = {.d32 = 0 };
+                               gotgctl.b.hstsethnpen = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gotgctl, 0, gotgctl.d32);
+                               core_if->op_state = A_SUSPEND;
+                       }
+                       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                       hprt0.b.prtsusp = 1;
+                       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+                       {
+                               dwc_irqflags_t flags;
+                               /* Update lx_state */
+                               DWC_SPINLOCK_IRQSAVE(dwc_otg_hcd->lock, &flags);
+                               core_if->lx_state = DWC_OTG_L2;
+                               DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, flags);
+                       }
+                       /* Suspend the Phy Clock */
+                       {
+                               pcgcctl_data_t pcgcctl = {.d32 = 0 };
+                               pcgcctl.b.stoppclk = 1;
+                               DWC_MODIFY_REG32(core_if->pcgcctl, 0,
+                                                pcgcctl.d32);
+                               dwc_udelay(10);
+                       }
+
+                       /* For HNP the bus must be suspended for at least 200ms. */
+                       if (dwc_otg_hcd->fops->get_b_hnp_enable(dwc_otg_hcd)) {
+                               pcgcctl_data_t pcgcctl = {.d32 = 0 };
+                               pcgcctl.b.stoppclk = 1;
+                DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32, 0);
+                               dwc_mdelay(200);
+                       }
+
+                       /** @todo - check how sw can wait for 1 sec to check asesvld??? */
+#if 0 //vahrama !!!!!!!!!!!!!!!!!!
+                       if (core_if->adp_enable) {
+                               gotgctl_data_t gotgctl = {.d32 = 0 };
+                               gpwrdn_data_t gpwrdn;
+
+                               while (gotgctl.b.asesvld == 1) {
+                                       gotgctl.d32 =
+                                           DWC_READ_REG32(&core_if->
+                                                          core_global_regs->
+                                                          gotgctl);
+                                       dwc_mdelay(100);
+                               }
+
+                               /* Enable Power Down Logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pmuactv = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+
+                               /* Unmask SRP detected interrupt from Power Down Logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.srp_det_msk = 1;
+                               DWC_MODIFY_REG32(&core_if->core_global_regs->
+                                                gpwrdn, 0, gpwrdn.d32);
+
+                               dwc_otg_adp_probe_start(core_if);
+                       }
+#endif
+                       break;
+               case UHF_PORT_POWER:
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "SetPortFeature - USB_PORT_FEAT_POWER\n");
+                       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                       hprt0.b.prtpwr = 1;
+                       DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+                       break;
+               case UHF_PORT_RESET:
+                       if ((core_if->power_down == 2)
+                           && (core_if->hibernation_suspend == 1)) {
+                               /* If we are going to exit from Hibernated
+                                * state via USB RESET.
+                                */
+                               dwc_otg_host_hibernation_restore(core_if, 0, 1);
+                       } else {
+                               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+
+                               DWC_DEBUGPL(DBG_HCD,
+                                           "DWC OTG HCD HUB CONTROL - "
+                                           "SetPortFeature - USB_PORT_FEAT_RESET\n");
+                               {
+                                       pcgcctl_data_t pcgcctl = {.d32 = 0 };
+                                       pcgcctl.b.enbl_sleep_gating = 1;
+                                       pcgcctl.b.stoppclk = 1;
+                                       DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32, 0);
+                                       DWC_WRITE_REG32(core_if->pcgcctl, 0);
+                               }
+#ifdef CONFIG_USB_DWC_OTG_LPM
+                               {
+                                       glpmcfg_data_t lpmcfg;
+                                       lpmcfg.d32 =
+                                               DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+                                       if (lpmcfg.b.prt_sleep_sts) {
+                                               lpmcfg.b.en_utmi_sleep = 0;
+                                               lpmcfg.b.hird_thres &= (~(1 << 4));
+                                               DWC_WRITE_REG32
+                                                   (&core_if->core_global_regs->glpmcfg,
+                                                    lpmcfg.d32);
+                                               dwc_mdelay(1);
+                                       }
+                               }
+#endif
+                               hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                               /* Clear suspend bit if resetting from suspended state. */
+                               hprt0.b.prtsusp = 0;
+                               /* When B-Host the Port reset bit is set in
+                                * the Start HCD Callback function, so that
+                                * the reset is started within 1ms of the HNP
+                                * success interrupt. */
+                               if (!dwc_otg_hcd_is_b_host(dwc_otg_hcd)) {
+                                       hprt0.b.prtpwr = 1;
+                                       hprt0.b.prtrst = 1;
+                                       DWC_PRINTF("Indeed it is in host mode hprt0 = %08x\n",hprt0.d32);
+                                       DWC_WRITE_REG32(core_if->host_if->hprt0,
+                                                       hprt0.d32);
+                               }
+                               /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */
+                               dwc_mdelay(60);
+                               hprt0.b.prtrst = 0;
+                               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+                               core_if->lx_state = DWC_OTG_L0; /* Now back to the on state */
+                       }
+                       break;
+#ifdef DWC_HS_ELECT_TST
+               case UHF_PORT_TEST:
+                       {
+                               uint32_t t;
+                               gintmsk_data_t gintmsk;
+
+                               t = (wIndex >> 8);      /* MSB wIndex USB */
+                               DWC_DEBUGPL(DBG_HCD,
+                                           "DWC OTG HCD HUB CONTROL - "
+                                           "SetPortFeature - USB_PORT_FEAT_TEST %d\n",
+                                           t);
+                               DWC_WARN("USB_PORT_FEAT_TEST %d\n", t);
+                               if (t < 6) {
+                                       hprt0.d32 = dwc_otg_read_hprt0(core_if);
+                                       hprt0.b.prttstctl = t;
+                                       DWC_WRITE_REG32(core_if->host_if->hprt0,
+                                                       hprt0.d32);
+                               } else {
+                                       /* Setup global vars with reg addresses (quick and
+                                        * dirty hack, should be cleaned up)
+                                        */
+                                       global_regs = core_if->core_global_regs;
+                                       hc_global_regs =
+                                           core_if->host_if->host_global_regs;
+                                       hc_regs =
+                                           (dwc_otg_hc_regs_t *) ((char *)
+                                                                  global_regs +
+                                                                  0x500);
+                                       data_fifo =
+                                           (uint32_t *) ((char *)global_regs +
+                                                         0x1000);
+
+                                       if (t == 6) {   /* HS_HOST_PORT_SUSPEND_RESUME */
+                                               /* Save current interrupt mask */
+                                               gintmsk.d32 =
+                                                   DWC_READ_REG32
+                                                   (&global_regs->gintmsk);
+
+                                               /* Disable all interrupts while we muck with
+                                                * the hardware directly
+                                                */
+                                               DWC_WRITE_REG32(&global_regs->gintmsk, 0);
+
+                                               /* 15 second delay per the test spec */
+                                               dwc_mdelay(15000);
+
+                                               /* Drive suspend on the root port */
+                                               hprt0.d32 =
+                                                   dwc_otg_read_hprt0(core_if);
+                                               hprt0.b.prtsusp = 1;
+                                               hprt0.b.prtres = 0;
+                                               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+
+                                               /* 15 second delay per the test spec */
+                                               dwc_mdelay(15000);
+
+                                               /* Drive resume on the root port */
+                                               hprt0.d32 =
+                                                   dwc_otg_read_hprt0(core_if);
+                                               hprt0.b.prtsusp = 0;
+                                               hprt0.b.prtres = 1;
+                                               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+                                               dwc_mdelay(100);
+
+                                               /* Clear the resume bit */
+                                               hprt0.b.prtres = 0;
+                                               DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
+
+                                               /* Restore interrupts */
+                                               DWC_WRITE_REG32(&global_regs->gintmsk, gintmsk.d32);
+                                       } else if (t == 7) {    /* SINGLE_STEP_GET_DEVICE_DESCRIPTOR setup */
+                                               /* Save current interrupt mask */
+                                               gintmsk.d32 =
+                                                   DWC_READ_REG32
+                                                   (&global_regs->gintmsk);
+
+                                               /* Disable all interrupts while we muck with
+                                                * the hardware directly
+                                                */
+                                               DWC_WRITE_REG32(&global_regs->gintmsk, 0);
+
+                                               /* 15 second delay per the test spec */
+                                               dwc_mdelay(15000);
+
+                                               /* Send the Setup packet */
+                                               do_setup();
+
+                                               /* 15 second delay so nothing else happens for awhile */
+                                               dwc_mdelay(15000);
+
+                                               /* Restore interrupts */
+                                               DWC_WRITE_REG32(&global_regs->gintmsk, gintmsk.d32);
+                                       } else if (t == 8) {    /* SINGLE_STEP_GET_DEVICE_DESCRIPTOR execute */
+                                               /* Save current interrupt mask */
+                                               gintmsk.d32 =
+                                                   DWC_READ_REG32
+                                                   (&global_regs->gintmsk);
+
+                                               /* Disable all interrupts while we muck with
+                                                * the hardware directly
+                                                */
+                                               DWC_WRITE_REG32(&global_regs->gintmsk, 0);
+
+                                               /* Send the Setup packet */
+                                               do_setup();
+
+                                               /* 15 second delay so nothing else happens for awhile */
+                                               dwc_mdelay(15000);
+
+                                               /* Send the In and Ack packets */
+                                               do_in_ack();
+
+                                               /* 15 second delay so nothing else happens for awhile */
+                                               dwc_mdelay(15000);
+
+                                               /* Restore interrupts */
+                                               DWC_WRITE_REG32(&global_regs->gintmsk, gintmsk.d32);
+                                       }
+                               }
+                               break;
+                       }
+#endif /* DWC_HS_ELECT_TST */
+
+               case UHF_PORT_INDICATOR:
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB CONTROL - "
+                                   "SetPortFeature - USB_PORT_FEAT_INDICATOR\n");
+                       /* Not supported */
+                       break;
+               default:
+                       retval = -DWC_E_INVALID;
+                       DWC_ERROR("DWC OTG HCD - "
+                                 "SetPortFeature request %xh "
+                                 "unknown or unsupported\n", wValue);
+                       break;
+               }
+               break;
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       case UCR_SET_AND_TEST_PORT_FEATURE:
+               if (wValue != UHF_PORT_L1) {
+                       goto error;
+               }
+               {
+                       int portnum, hird, devaddr, remwake;
+                       glpmcfg_data_t lpmcfg;
+                       uint32_t time_usecs;
+                       gintsts_data_t gintsts;
+                       gintmsk_data_t gintmsk;
+
+                       if (!dwc_otg_get_param_lpm_enable(core_if)) {
+                               goto error;
+                       }
+                       if (wValue != UHF_PORT_L1 || wLength != 1) {
+                               goto error;
+                       }
+                       /* Check if the port currently is in SLEEP state */
+                       lpmcfg.d32 =
+                           DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+                       if (lpmcfg.b.prt_sleep_sts) {
+                               DWC_INFO("Port is already in sleep mode\n");
+                               buf[0] = 0;     /* Return success */
+                               break;
+                       }
+
+                       portnum = wIndex & 0xf;
+                       hird = (wIndex >> 4) & 0xf;
+                       devaddr = (wIndex >> 8) & 0x7f;
+                       remwake = (wIndex >> 15);
+
+                       if (portnum != 1) {
+                               retval = -DWC_E_INVALID;
+                               DWC_WARN
+                                   ("Wrong port number(%d) in SetandTestPortFeature request\n",
+                                    portnum);
+                               break;
+                       }
+
+                       DWC_PRINTF
+                           ("SetandTestPortFeature request: portnum = %d, hird = %d, devaddr = %d, rewake = %d\n",
+                            portnum, hird, devaddr, remwake);
+                       /* Disable LPM interrupt */
+                       gintmsk.d32 = 0;
+                       gintmsk.b.lpmtranrcvd = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk,
+                                        gintmsk.d32, 0);
+
+                       if (dwc_otg_hcd_send_lpm
+                           (dwc_otg_hcd, devaddr, hird, remwake)) {
+                               retval = -DWC_E_INVALID;
+                               break;
+                       }
+
+                       time_usecs = 10 * (lpmcfg.b.retry_count + 1);
+                       /* We will consider timeout if time_usecs microseconds pass,
+                        * and we don't receive LPM transaction status.
+                        * After receiving non-error responce(ACK/NYET/STALL) from device,
+                        *  core will set lpmtranrcvd bit.
+                        */
+                       do {
+                               gintsts.d32 =
+                                   DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+                               if (gintsts.b.lpmtranrcvd) {
+                                       break;
+                               }
+                               dwc_udelay(1);
+                       } while (--time_usecs);
+                       /* lpm_int bit will be cleared in LPM interrupt handler */
+
+                       /* Now fill status
+                        * 0x00 - Success
+                        * 0x10 - NYET
+                        * 0x11 - Timeout
+                        */
+                       if (!gintsts.b.lpmtranrcvd) {
+                               buf[0] = 0x3;   /* Completion code is Timeout */
+                               dwc_otg_hcd_free_hc_from_lpm(dwc_otg_hcd);
+                       } else {
+                               lpmcfg.d32 =
+                                   DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+                               if (lpmcfg.b.lpm_resp == 0x3) {
+                                       /* ACK responce from the device */
+                                       buf[0] = 0x00;  /* Success */
+                               } else if (lpmcfg.b.lpm_resp == 0x2) {
+                                       /* NYET responce from the device */
+                                       buf[0] = 0x2;
+                               } else {
+                                       /* Otherwise responce with Timeout */
+                                       buf[0] = 0x3;
+                               }
+                       }
+                       DWC_PRINTF("Device responce to LPM trans is %x\n",
+                                  lpmcfg.b.lpm_resp);
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk, 0,
+                                        gintmsk.d32);
+
+                       break;
+               }
+#endif /* CONFIG_USB_DWC_OTG_LPM */
+       default:
+error:
+               retval = -DWC_E_INVALID;
+               DWC_WARN("DWC OTG HCD - "
+                        "Unknown hub control request type or invalid typeReq: %xh wIndex: %xh wValue: %xh\n",
+                        typeReq, wIndex, wValue);
+               break;
+       }
+
+       return retval;
+}
+
+#ifdef CONFIG_USB_DWC_OTG_LPM
+/** Returns index of host channel to perform LPM transaction. */
+int dwc_otg_hcd_get_hc_for_lpm_tran(dwc_otg_hcd_t * hcd, uint8_t devaddr)
+{
+       dwc_otg_core_if_t *core_if = hcd->core_if;
+       dwc_hc_t *hc;
+       hcchar_data_t hcchar;
+       gintmsk_data_t gintmsk = {.d32 = 0 };
+
+       if (DWC_CIRCLEQ_EMPTY(&hcd->free_hc_list)) {
+               DWC_PRINTF("No free channel to select for LPM transaction\n");
+               return -1;
+       }
+
+       hc = DWC_CIRCLEQ_FIRST(&hcd->free_hc_list);
+
+       /* Mask host channel interrupts. */
+       gintmsk.b.hcintr = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk, gintmsk.d32, 0);
+
+       /* Fill fields that core needs for LPM transaction */
+       hcchar.b.devaddr = devaddr;
+       hcchar.b.epnum = 0;
+       hcchar.b.eptype = DWC_OTG_EP_TYPE_CONTROL;
+       hcchar.b.mps = 64;
+       hcchar.b.lspddev = (hc->speed == DWC_OTG_EP_SPEED_LOW);
+       hcchar.b.epdir = 0;     /* OUT */
+       DWC_WRITE_REG32(&core_if->host_if->hc_regs[hc->hc_num]->hcchar,
+                       hcchar.d32);
+
+       /* Remove the host channel from the free list. */
+       DWC_CIRCLEQ_REMOVE_INIT(&hcd->free_hc_list, hc, hc_list_entry);
+
+       DWC_PRINTF("hcnum = %d devaddr = %d\n", hc->hc_num, devaddr);
+
+       return hc->hc_num;
+}
+
+/** Release hc after performing LPM transaction */
+void dwc_otg_hcd_free_hc_from_lpm(dwc_otg_hcd_t * hcd)
+{
+       dwc_hc_t *hc;
+       glpmcfg_data_t lpmcfg;
+       uint8_t hc_num;
+
+       lpmcfg.d32 = DWC_READ_REG32(&hcd->core_if->core_global_regs->glpmcfg);
+       hc_num = lpmcfg.b.lpm_chan_index;
+
+       hc = hcd->hc_ptr_array[hc_num];
+
+       DWC_PRINTF("Freeing channel %d after LPM\n", hc_num);
+       /* Return host channel to free list */
+       DWC_CIRCLEQ_INSERT_TAIL(&hcd->free_hc_list, hc, hc_list_entry);
+}
+
+int dwc_otg_hcd_send_lpm(dwc_otg_hcd_t * hcd, uint8_t devaddr, uint8_t hird,
+                        uint8_t bRemoteWake)
+{
+       glpmcfg_data_t lpmcfg;
+       pcgcctl_data_t pcgcctl = {.d32 = 0 };
+       int channel;
+
+       channel = dwc_otg_hcd_get_hc_for_lpm_tran(hcd, devaddr);
+       if (channel < 0) {
+               return channel;
+       }
+
+       pcgcctl.b.enbl_sleep_gating = 1;
+       DWC_MODIFY_REG32(hcd->core_if->pcgcctl, 0, pcgcctl.d32);
+
+       /* Read LPM config register */
+       lpmcfg.d32 = DWC_READ_REG32(&hcd->core_if->core_global_regs->glpmcfg);
+
+       /* Program LPM transaction fields */
+       lpmcfg.b.rem_wkup_en = bRemoteWake;
+       lpmcfg.b.hird = hird;
+       lpmcfg.b.hird_thres = 0x1c;
+       lpmcfg.b.lpm_chan_index = channel;
+       lpmcfg.b.en_utmi_sleep = 1;
+       /* Program LPM config register */
+       DWC_WRITE_REG32(&hcd->core_if->core_global_regs->glpmcfg, lpmcfg.d32);
+
+       /* Send LPM transaction */
+       lpmcfg.b.send_lpm = 1;
+       DWC_WRITE_REG32(&hcd->core_if->core_global_regs->glpmcfg, lpmcfg.d32);
+
+       return 0;
+}
+
+#endif /* CONFIG_USB_DWC_OTG_LPM */
+
+int dwc_otg_hcd_is_status_changed(dwc_otg_hcd_t * hcd, int port)
+{
+       int retval;
+
+       if (port != 1) {
+               return -DWC_E_INVALID;
+       }
+
+       retval = (hcd->flags.b.port_connect_status_change ||
+                 hcd->flags.b.port_reset_change ||
+                 hcd->flags.b.port_enable_change ||
+                 hcd->flags.b.port_suspend_change ||
+                 hcd->flags.b.port_over_current_change);
+#ifdef DEBUG
+       if (retval) {
+               DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD HUB STATUS DATA:"
+                           " Root port status changed\n");
+               DWC_DEBUGPL(DBG_HCDV, "  port_connect_status_change: %d\n",
+                           hcd->flags.b.port_connect_status_change);
+               DWC_DEBUGPL(DBG_HCDV, "  port_reset_change: %d\n",
+                           hcd->flags.b.port_reset_change);
+               DWC_DEBUGPL(DBG_HCDV, "  port_enable_change: %d\n",
+                           hcd->flags.b.port_enable_change);
+               DWC_DEBUGPL(DBG_HCDV, "  port_suspend_change: %d\n",
+                           hcd->flags.b.port_suspend_change);
+               DWC_DEBUGPL(DBG_HCDV, "  port_over_current_change: %d\n",
+                           hcd->flags.b.port_over_current_change);
+       }
+#endif
+       return retval;
+}
+
+int dwc_otg_hcd_get_frame_number(dwc_otg_hcd_t * dwc_otg_hcd)
+{
+       hfnum_data_t hfnum;
+       hfnum.d32 =
+           DWC_READ_REG32(&dwc_otg_hcd->core_if->host_if->host_global_regs->
+                          hfnum);
+
+#ifdef DEBUG_SOF
+       DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD GET FRAME NUMBER %d\n",
+                   hfnum.b.frnum);
+#endif
+       return hfnum.b.frnum;
+}
+
+int dwc_otg_hcd_start(dwc_otg_hcd_t * hcd,
+                     struct dwc_otg_hcd_function_ops *fops)
+{
+       int retval = 0;
+
+       hcd->fops = fops;
+       if (!dwc_otg_is_device_mode(hcd->core_if) &&
+               (!hcd->core_if->adp_enable || hcd->core_if->adp.adp_started)) {
+               dwc_otg_hcd_reinit(hcd);
+       } else {
+               retval = -DWC_E_NO_DEVICE;
+       }
+
+       return retval;
+}
+
+void *dwc_otg_hcd_get_priv_data(dwc_otg_hcd_t * hcd)
+{
+       return hcd->priv;
+}
+
+void dwc_otg_hcd_set_priv_data(dwc_otg_hcd_t * hcd, void *priv_data)
+{
+       hcd->priv = priv_data;
+}
+
+uint32_t dwc_otg_hcd_otg_port(dwc_otg_hcd_t * hcd)
+{
+       return hcd->otg_port;
+}
+
+uint32_t dwc_otg_hcd_is_b_host(dwc_otg_hcd_t * hcd)
+{
+       uint32_t is_b_host;
+       if (hcd->core_if->op_state == B_HOST) {
+               is_b_host = 1;
+       } else {
+               is_b_host = 0;
+       }
+
+       return is_b_host;
+}
+
+dwc_otg_hcd_urb_t *dwc_otg_hcd_urb_alloc(dwc_otg_hcd_t * hcd,
+                                        int iso_desc_count, int atomic_alloc)
+{
+       dwc_otg_hcd_urb_t *dwc_otg_urb;
+       uint32_t size;
+
+       size =
+           sizeof(*dwc_otg_urb) +
+           iso_desc_count * sizeof(struct dwc_otg_hcd_iso_packet_desc);
+       if (atomic_alloc)
+               dwc_otg_urb = DWC_ALLOC_ATOMIC(size);
+       else
+               dwc_otg_urb = DWC_ALLOC(size);
+
+        if (dwc_otg_urb)
+               dwc_otg_urb->packet_count = iso_desc_count;
+        else {
+               DWC_ERROR("**** DWC OTG HCD URB alloc - "
+                       "%salloc of %db failed\n",
+                       atomic_alloc?"atomic ":"", size);
+       }
+       return dwc_otg_urb;
+}
+
+void dwc_otg_hcd_urb_set_pipeinfo(dwc_otg_hcd_urb_t * dwc_otg_urb,
+                                 uint8_t dev_addr, uint8_t ep_num,
+                                 uint8_t ep_type, uint8_t ep_dir, uint16_t mps)
+{
+       dwc_otg_hcd_fill_pipe(&dwc_otg_urb->pipe_info, dev_addr, ep_num,
+                             ep_type, ep_dir, mps);
+#if 0
+       DWC_PRINTF
+           ("addr = %d, ep_num = %d, ep_dir = 0x%x, ep_type = 0x%x, mps = %d\n",
+            dev_addr, ep_num, ep_dir, ep_type, mps);
+#endif
+}
+
+void dwc_otg_hcd_urb_set_params(dwc_otg_hcd_urb_t * dwc_otg_urb,
+                               void *urb_handle, void *buf, dwc_dma_t dma,
+                               uint32_t buflen, void *setup_packet,
+                               dwc_dma_t setup_dma, uint32_t flags,
+                               uint16_t interval)
+{
+       dwc_otg_urb->priv = urb_handle;
+       dwc_otg_urb->buf = buf;
+       dwc_otg_urb->dma = dma;
+       dwc_otg_urb->length = buflen;
+       dwc_otg_urb->setup_packet = setup_packet;
+       dwc_otg_urb->setup_dma = setup_dma;
+       dwc_otg_urb->flags = flags;
+       dwc_otg_urb->interval = interval;
+       dwc_otg_urb->status = -DWC_E_IN_PROGRESS;
+}
+
+uint32_t dwc_otg_hcd_urb_get_status(dwc_otg_hcd_urb_t * dwc_otg_urb)
+{
+       return dwc_otg_urb->status;
+}
+
+uint32_t dwc_otg_hcd_urb_get_actual_length(dwc_otg_hcd_urb_t * dwc_otg_urb)
+{
+       return dwc_otg_urb->actual_length;
+}
+
+uint32_t dwc_otg_hcd_urb_get_error_count(dwc_otg_hcd_urb_t * dwc_otg_urb)
+{
+       return dwc_otg_urb->error_count;
+}
+
+void dwc_otg_hcd_urb_set_iso_desc_params(dwc_otg_hcd_urb_t * dwc_otg_urb,
+                                        int desc_num, uint32_t offset,
+                                        uint32_t length)
+{
+       dwc_otg_urb->iso_descs[desc_num].offset = offset;
+       dwc_otg_urb->iso_descs[desc_num].length = length;
+}
+
+uint32_t dwc_otg_hcd_urb_get_iso_desc_status(dwc_otg_hcd_urb_t * dwc_otg_urb,
+                                            int desc_num)
+{
+       return dwc_otg_urb->iso_descs[desc_num].status;
+}
+
+uint32_t dwc_otg_hcd_urb_get_iso_desc_actual_length(dwc_otg_hcd_urb_t *
+                                                   dwc_otg_urb, int desc_num)
+{
+       return dwc_otg_urb->iso_descs[desc_num].actual_length;
+}
+
+int dwc_otg_hcd_is_bandwidth_allocated(dwc_otg_hcd_t * hcd, void *ep_handle)
+{
+       int allocated = 0;
+       dwc_otg_qh_t *qh = (dwc_otg_qh_t *) ep_handle;
+
+       if (qh) {
+               if (!DWC_LIST_EMPTY(&qh->qh_list_entry)) {
+                       allocated = 1;
+               }
+       }
+       return allocated;
+}
+
+int dwc_otg_hcd_is_bandwidth_freed(dwc_otg_hcd_t * hcd, void *ep_handle)
+{
+       dwc_otg_qh_t *qh = (dwc_otg_qh_t *) ep_handle;
+       int freed = 0;
+       DWC_ASSERT(qh, "qh is not allocated\n");
+
+       if (DWC_LIST_EMPTY(&qh->qh_list_entry)) {
+               freed = 1;
+       }
+
+       return freed;
+}
+
+uint8_t dwc_otg_hcd_get_ep_bandwidth(dwc_otg_hcd_t * hcd, void *ep_handle)
+{
+       dwc_otg_qh_t *qh = (dwc_otg_qh_t *) ep_handle;
+       DWC_ASSERT(qh, "qh is not allocated\n");
+       return qh->usecs;
+}
+
+void dwc_otg_hcd_dump_state(dwc_otg_hcd_t * hcd)
+{
+#ifdef DEBUG
+       int num_channels;
+       int i;
+       gnptxsts_data_t np_tx_status;
+       hptxsts_data_t p_tx_status;
+
+       num_channels = hcd->core_if->core_params->host_channels;
+       DWC_PRINTF("\n");
+       DWC_PRINTF
+           ("************************************************************\n");
+       DWC_PRINTF("HCD State:\n");
+       DWC_PRINTF("  Num channels: %d\n", num_channels);
+       for (i = 0; i < num_channels; i++) {
+               dwc_hc_t *hc = hcd->hc_ptr_array[i];
+               DWC_PRINTF("  Channel %d:\n", i);
+               DWC_PRINTF("    dev_addr: %d, ep_num: %d, ep_is_in: %d\n",
+                          hc->dev_addr, hc->ep_num, hc->ep_is_in);
+               DWC_PRINTF("    speed: %d\n", hc->speed);
+               DWC_PRINTF("    ep_type: %d\n", hc->ep_type);
+               DWC_PRINTF("    max_packet: %d\n", hc->max_packet);
+               DWC_PRINTF("    data_pid_start: %d\n", hc->data_pid_start);
+               DWC_PRINTF("    multi_count: %d\n", hc->multi_count);
+               DWC_PRINTF("    xfer_started: %d\n", hc->xfer_started);
+               DWC_PRINTF("    xfer_buff: %p\n", hc->xfer_buff);
+               DWC_PRINTF("    xfer_len: %d\n", hc->xfer_len);
+               DWC_PRINTF("    xfer_count: %d\n", hc->xfer_count);
+               DWC_PRINTF("    halt_on_queue: %d\n", hc->halt_on_queue);
+               DWC_PRINTF("    halt_pending: %d\n", hc->halt_pending);
+               DWC_PRINTF("    halt_status: %d\n", hc->halt_status);
+               DWC_PRINTF("    do_split: %d\n", hc->do_split);
+               DWC_PRINTF("    complete_split: %d\n", hc->complete_split);
+               DWC_PRINTF("    hub_addr: %d\n", hc->hub_addr);
+               DWC_PRINTF("    port_addr: %d\n", hc->port_addr);
+               DWC_PRINTF("    xact_pos: %d\n", hc->xact_pos);
+               DWC_PRINTF("    requests: %d\n", hc->requests);
+               DWC_PRINTF("    qh: %p\n", hc->qh);
+               if (hc->xfer_started) {
+                       hfnum_data_t hfnum;
+                       hcchar_data_t hcchar;
+                       hctsiz_data_t hctsiz;
+                       hcint_data_t hcint;
+                       hcintmsk_data_t hcintmsk;
+                       hfnum.d32 =
+                           DWC_READ_REG32(&hcd->core_if->
+                                          host_if->host_global_regs->hfnum);
+                       hcchar.d32 =
+                           DWC_READ_REG32(&hcd->core_if->host_if->
+                                          hc_regs[i]->hcchar);
+                       hctsiz.d32 =
+                           DWC_READ_REG32(&hcd->core_if->host_if->
+                                          hc_regs[i]->hctsiz);
+                       hcint.d32 =
+                           DWC_READ_REG32(&hcd->core_if->host_if->
+                                          hc_regs[i]->hcint);
+                       hcintmsk.d32 =
+                           DWC_READ_REG32(&hcd->core_if->host_if->
+                                          hc_regs[i]->hcintmsk);
+                       DWC_PRINTF("    hfnum: 0x%08x\n", hfnum.d32);
+                       DWC_PRINTF("    hcchar: 0x%08x\n", hcchar.d32);
+                       DWC_PRINTF("    hctsiz: 0x%08x\n", hctsiz.d32);
+                       DWC_PRINTF("    hcint: 0x%08x\n", hcint.d32);
+                       DWC_PRINTF("    hcintmsk: 0x%08x\n", hcintmsk.d32);
+               }
+               if (hc->xfer_started && hc->qh) {
+                       dwc_otg_qtd_t *qtd;
+                       dwc_otg_hcd_urb_t *urb;
+
+                       DWC_CIRCLEQ_FOREACH(qtd, &hc->qh->qtd_list, qtd_list_entry) {
+                               if (!qtd->in_process)
+                                       break;
+
+                               urb = qtd->urb;
+                       DWC_PRINTF("    URB Info:\n");
+                       DWC_PRINTF("      qtd: %p, urb: %p\n", qtd, urb);
+                       if (urb) {
+                               DWC_PRINTF("      Dev: %d, EP: %d %s\n",
+                                          dwc_otg_hcd_get_dev_addr(&urb->
+                                                                   pipe_info),
+                                          dwc_otg_hcd_get_ep_num(&urb->
+                                                                 pipe_info),
+                                          dwc_otg_hcd_is_pipe_in(&urb->
+                                                                 pipe_info) ?
+                                          "IN" : "OUT");
+                               DWC_PRINTF("      Max packet size: %d\n",
+                                          dwc_otg_hcd_get_mps(&urb->
+                                                              pipe_info));
+                               DWC_PRINTF("      transfer_buffer: %p\n",
+                                          urb->buf);
+                               DWC_PRINTF("      transfer_dma: %p\n",
+                                          (void *)urb->dma);
+                               DWC_PRINTF("      transfer_buffer_length: %d\n",
+                                          urb->length);
+                                       DWC_PRINTF("      actual_length: %d\n",
+                                                  urb->actual_length);
+                               }
+                       }
+               }
+       }
+       DWC_PRINTF("  non_periodic_channels: %d\n", hcd->non_periodic_channels);
+       DWC_PRINTF("  periodic_channels: %d\n", hcd->periodic_channels);
+       DWC_PRINTF("  periodic_usecs: %d\n", hcd->periodic_usecs);
+       np_tx_status.d32 =
+           DWC_READ_REG32(&hcd->core_if->core_global_regs->gnptxsts);
+       DWC_PRINTF("  NP Tx Req Queue Space Avail: %d\n",
+                  np_tx_status.b.nptxqspcavail);
+       DWC_PRINTF("  NP Tx FIFO Space Avail: %d\n",
+                  np_tx_status.b.nptxfspcavail);
+       p_tx_status.d32 =
+           DWC_READ_REG32(&hcd->core_if->host_if->host_global_regs->hptxsts);
+       DWC_PRINTF("  P Tx Req Queue Space Avail: %d\n",
+                  p_tx_status.b.ptxqspcavail);
+       DWC_PRINTF("  P Tx FIFO Space Avail: %d\n", p_tx_status.b.ptxfspcavail);
+       dwc_otg_hcd_dump_frrem(hcd);
+       dwc_otg_dump_global_registers(hcd->core_if);
+       dwc_otg_dump_host_registers(hcd->core_if);
+       DWC_PRINTF
+           ("************************************************************\n");
+       DWC_PRINTF("\n");
+#endif
+}
+
+#ifdef DEBUG
+void dwc_print_setup_data(uint8_t * setup)
+{
+       int i;
+       if (CHK_DEBUG_LEVEL(DBG_HCD)) {
+               DWC_PRINTF("Setup Data = MSB ");
+               for (i = 7; i >= 0; i--)
+                       DWC_PRINTF("%02x ", setup[i]);
+               DWC_PRINTF("\n");
+               DWC_PRINTF("  bmRequestType Tranfer = %s\n",
+                          (setup[0] & 0x80) ? "Device-to-Host" :
+                          "Host-to-Device");
+               DWC_PRINTF("  bmRequestType Type = ");
+               switch ((setup[0] & 0x60) >> 5) {
+               case 0:
+                       DWC_PRINTF("Standard\n");
+                       break;
+               case 1:
+                       DWC_PRINTF("Class\n");
+                       break;
+               case 2:
+                       DWC_PRINTF("Vendor\n");
+                       break;
+               case 3:
+                       DWC_PRINTF("Reserved\n");
+                       break;
+               }
+               DWC_PRINTF("  bmRequestType Recipient = ");
+               switch (setup[0] & 0x1f) {
+               case 0:
+                       DWC_PRINTF("Device\n");
+                       break;
+               case 1:
+                       DWC_PRINTF("Interface\n");
+                       break;
+               case 2:
+                       DWC_PRINTF("Endpoint\n");
+                       break;
+               case 3:
+                       DWC_PRINTF("Other\n");
+                       break;
+               default:
+                       DWC_PRINTF("Reserved\n");
+                       break;
+               }
+               DWC_PRINTF("  bRequest = 0x%0x\n", setup[1]);
+               DWC_PRINTF("  wValue = 0x%0x\n", *((uint16_t *) & setup[2]));
+               DWC_PRINTF("  wIndex = 0x%0x\n", *((uint16_t *) & setup[4]));
+               DWC_PRINTF("  wLength = 0x%0x\n\n", *((uint16_t *) & setup[6]));
+       }
+}
+#endif
+
+void dwc_otg_hcd_dump_frrem(dwc_otg_hcd_t * hcd)
+{
+#if 0
+       DWC_PRINTF("Frame remaining at SOF:\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->frrem_samples, hcd->frrem_accum,
+                  (hcd->frrem_samples > 0) ?
+                  hcd->frrem_accum / hcd->frrem_samples : 0);
+
+       DWC_PRINTF("\n");
+       DWC_PRINTF("Frame remaining at start_transfer (uframe 7):\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->core_if->hfnum_7_samples,
+                  hcd->core_if->hfnum_7_frrem_accum,
+                  (hcd->core_if->hfnum_7_samples >
+                   0) ? hcd->core_if->hfnum_7_frrem_accum /
+                  hcd->core_if->hfnum_7_samples : 0);
+       DWC_PRINTF("Frame remaining at start_transfer (uframe 0):\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->core_if->hfnum_0_samples,
+                  hcd->core_if->hfnum_0_frrem_accum,
+                  (hcd->core_if->hfnum_0_samples >
+                   0) ? hcd->core_if->hfnum_0_frrem_accum /
+                  hcd->core_if->hfnum_0_samples : 0);
+       DWC_PRINTF("Frame remaining at start_transfer (uframe 1-6):\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->core_if->hfnum_other_samples,
+                  hcd->core_if->hfnum_other_frrem_accum,
+                  (hcd->core_if->hfnum_other_samples >
+                   0) ? hcd->core_if->hfnum_other_frrem_accum /
+                  hcd->core_if->hfnum_other_samples : 0);
+
+       DWC_PRINTF("\n");
+       DWC_PRINTF("Frame remaining at sample point A (uframe 7):\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->hfnum_7_samples_a, hcd->hfnum_7_frrem_accum_a,
+                  (hcd->hfnum_7_samples_a > 0) ?
+                  hcd->hfnum_7_frrem_accum_a / hcd->hfnum_7_samples_a : 0);
+       DWC_PRINTF("Frame remaining at sample point A (uframe 0):\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->hfnum_0_samples_a, hcd->hfnum_0_frrem_accum_a,
+                  (hcd->hfnum_0_samples_a > 0) ?
+                  hcd->hfnum_0_frrem_accum_a / hcd->hfnum_0_samples_a : 0);
+       DWC_PRINTF("Frame remaining at sample point A (uframe 1-6):\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->hfnum_other_samples_a, hcd->hfnum_other_frrem_accum_a,
+                  (hcd->hfnum_other_samples_a > 0) ?
+                  hcd->hfnum_other_frrem_accum_a /
+                  hcd->hfnum_other_samples_a : 0);
+
+       DWC_PRINTF("\n");
+       DWC_PRINTF("Frame remaining at sample point B (uframe 7):\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->hfnum_7_samples_b, hcd->hfnum_7_frrem_accum_b,
+                  (hcd->hfnum_7_samples_b > 0) ?
+                  hcd->hfnum_7_frrem_accum_b / hcd->hfnum_7_samples_b : 0);
+       DWC_PRINTF("Frame remaining at sample point B (uframe 0):\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->hfnum_0_samples_b, hcd->hfnum_0_frrem_accum_b,
+                  (hcd->hfnum_0_samples_b > 0) ?
+                  hcd->hfnum_0_frrem_accum_b / hcd->hfnum_0_samples_b : 0);
+       DWC_PRINTF("Frame remaining at sample point B (uframe 1-6):\n");
+       DWC_PRINTF("  samples %u, accum %llu, avg %llu\n",
+                  hcd->hfnum_other_samples_b, hcd->hfnum_other_frrem_accum_b,
+                  (hcd->hfnum_other_samples_b > 0) ?
+                  hcd->hfnum_other_frrem_accum_b /
+                  hcd->hfnum_other_samples_b : 0);
+#endif
+}
+
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.h
@@ -0,0 +1,870 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd.h $
+ * $Revision: #58 $
+ * $Date: 2011/09/15 $
+ * $Change: 1846647 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_DEVICE_ONLY
+#ifndef __DWC_HCD_H__
+#define __DWC_HCD_H__
+
+#include "dwc_otg_os_dep.h"
+#include "usb.h"
+#include "dwc_otg_hcd_if.h"
+#include "dwc_otg_core_if.h"
+#include "dwc_list.h"
+#include "dwc_otg_cil.h"
+#include "dwc_otg_fiq_fsm.h"
+#include "dwc_otg_driver.h"
+
+
+/**
+ * @file
+ *
+ * This file contains the structures, constants, and interfaces for
+ * the Host Contoller Driver (HCD).
+ *
+ * The Host Controller Driver (HCD) is responsible for translating requests
+ * from the USB Driver into the appropriate actions on the DWC_otg controller.
+ * It isolates the USBD from the specifics of the controller by providing an
+ * API to the USBD.
+ */
+
+struct dwc_otg_hcd_pipe_info {
+       uint8_t dev_addr;
+       uint8_t ep_num;
+       uint8_t pipe_type;
+       uint8_t pipe_dir;
+       uint16_t mps;
+};
+
+struct dwc_otg_hcd_iso_packet_desc {
+       uint32_t offset;
+       uint32_t length;
+       uint32_t actual_length;
+       uint32_t status;
+};
+
+struct dwc_otg_qtd;
+
+struct dwc_otg_hcd_urb {
+       void *priv;
+       struct dwc_otg_qtd *qtd;
+       void *buf;
+       dwc_dma_t dma;
+       void *setup_packet;
+       dwc_dma_t setup_dma;
+       uint32_t length;
+       uint32_t actual_length;
+       uint32_t status;
+       uint32_t error_count;
+       uint32_t packet_count;
+       uint32_t flags;
+       uint16_t interval;
+       struct dwc_otg_hcd_pipe_info pipe_info;
+       struct dwc_otg_hcd_iso_packet_desc iso_descs[0];
+};
+
+static inline uint8_t dwc_otg_hcd_get_ep_num(struct dwc_otg_hcd_pipe_info *pipe)
+{
+       return pipe->ep_num;
+}
+
+static inline uint8_t dwc_otg_hcd_get_pipe_type(struct dwc_otg_hcd_pipe_info
+                                               *pipe)
+{
+       return pipe->pipe_type;
+}
+
+static inline uint16_t dwc_otg_hcd_get_mps(struct dwc_otg_hcd_pipe_info *pipe)
+{
+       return pipe->mps;
+}
+
+static inline uint8_t dwc_otg_hcd_get_dev_addr(struct dwc_otg_hcd_pipe_info
+                                              *pipe)
+{
+       return pipe->dev_addr;
+}
+
+static inline uint8_t dwc_otg_hcd_is_pipe_isoc(struct dwc_otg_hcd_pipe_info
+                                              *pipe)
+{
+       return (pipe->pipe_type == UE_ISOCHRONOUS);
+}
+
+static inline uint8_t dwc_otg_hcd_is_pipe_int(struct dwc_otg_hcd_pipe_info
+                                             *pipe)
+{
+       return (pipe->pipe_type == UE_INTERRUPT);
+}
+
+static inline uint8_t dwc_otg_hcd_is_pipe_bulk(struct dwc_otg_hcd_pipe_info
+                                              *pipe)
+{
+       return (pipe->pipe_type == UE_BULK);
+}
+
+static inline uint8_t dwc_otg_hcd_is_pipe_control(struct dwc_otg_hcd_pipe_info
+                                                 *pipe)
+{
+       return (pipe->pipe_type == UE_CONTROL);
+}
+
+static inline uint8_t dwc_otg_hcd_is_pipe_in(struct dwc_otg_hcd_pipe_info *pipe)
+{
+       return (pipe->pipe_dir == UE_DIR_IN);
+}
+
+static inline uint8_t dwc_otg_hcd_is_pipe_out(struct dwc_otg_hcd_pipe_info
+                                             *pipe)
+{
+       return (!dwc_otg_hcd_is_pipe_in(pipe));
+}
+
+static inline void dwc_otg_hcd_fill_pipe(struct dwc_otg_hcd_pipe_info *pipe,
+                                        uint8_t devaddr, uint8_t ep_num,
+                                        uint8_t pipe_type, uint8_t pipe_dir,
+                                        uint16_t mps)
+{
+       pipe->dev_addr = devaddr;
+       pipe->ep_num = ep_num;
+       pipe->pipe_type = pipe_type;
+       pipe->pipe_dir = pipe_dir;
+       pipe->mps = mps;
+}
+
+/**
+ * Phases for control transfers.
+ */
+typedef enum dwc_otg_control_phase {
+       DWC_OTG_CONTROL_SETUP,
+       DWC_OTG_CONTROL_DATA,
+       DWC_OTG_CONTROL_STATUS
+} dwc_otg_control_phase_e;
+
+/** Transaction types. */
+typedef enum dwc_otg_transaction_type {
+       DWC_OTG_TRANSACTION_NONE          = 0,
+       DWC_OTG_TRANSACTION_PERIODIC      = 1,
+       DWC_OTG_TRANSACTION_NON_PERIODIC  = 2,
+       DWC_OTG_TRANSACTION_ALL           = DWC_OTG_TRANSACTION_PERIODIC + DWC_OTG_TRANSACTION_NON_PERIODIC
+} dwc_otg_transaction_type_e;
+
+struct dwc_otg_qh;
+
+/**
+ * A Queue Transfer Descriptor (QTD) holds the state of a bulk, control,
+ * interrupt, or isochronous transfer. A single QTD is created for each URB
+ * (of one of these types) submitted to the HCD. The transfer associated with
+ * a QTD may require one or multiple transactions.
+ *
+ * A QTD is linked to a Queue Head, which is entered in either the
+ * non-periodic or periodic schedule for execution. When a QTD is chosen for
+ * execution, some or all of its transactions may be executed. After
+ * execution, the state of the QTD is updated. The QTD may be retired if all
+ * its transactions are complete or if an error occurred. Otherwise, it
+ * remains in the schedule so more transactions can be executed later.
+ */
+typedef struct dwc_otg_qtd {
+       /**
+        * Determines the PID of the next data packet for the data phase of
+        * control transfers. Ignored for other transfer types.<br>
+        * One of the following values:
+        *      - DWC_OTG_HC_PID_DATA0
+        *      - DWC_OTG_HC_PID_DATA1
+        */
+       uint8_t data_toggle;
+
+       /** Current phase for control transfers (Setup, Data, or Status). */
+       dwc_otg_control_phase_e control_phase;
+
+       /** Keep track of the current split type
+        * for FS/LS endpoints on a HS Hub */
+       uint8_t complete_split;
+
+       /** How many bytes transferred during SSPLIT OUT */
+       uint32_t ssplit_out_xfer_count;
+
+       /**
+        * Holds the number of bus errors that have occurred for a transaction
+        * within this transfer.
+        */
+       uint8_t error_count;
+
+       /**
+        * Index of the next frame descriptor for an isochronous transfer. A
+        * frame descriptor describes the buffer position and length of the
+        * data to be transferred in the next scheduled (micro)frame of an
+        * isochronous transfer. It also holds status for that transaction.
+        * The frame index starts at 0.
+        */
+       uint16_t isoc_frame_index;
+
+       /** Position of the ISOC split on full/low speed */
+       uint8_t isoc_split_pos;
+
+       /** Position of the ISOC split in the buffer for the current frame */
+       uint16_t isoc_split_offset;
+
+       /** URB for this transfer */
+       struct dwc_otg_hcd_urb *urb;
+
+       struct dwc_otg_qh *qh;
+
+       /** This list of QTDs */
+        DWC_CIRCLEQ_ENTRY(dwc_otg_qtd) qtd_list_entry;
+
+       /** Indicates if this QTD is currently processed by HW. */
+       uint8_t in_process;
+
+       /** Number of DMA descriptors for this QTD */
+       uint8_t n_desc;
+
+       /**
+        * Last activated frame(packet) index.
+        * Used in Descriptor DMA mode only.
+        */
+       uint16_t isoc_frame_index_last;
+
+} dwc_otg_qtd_t;
+
+DWC_CIRCLEQ_HEAD(dwc_otg_qtd_list, dwc_otg_qtd);
+
+/**
+ * A Queue Head (QH) holds the static characteristics of an endpoint and
+ * maintains a list of transfers (QTDs) for that endpoint. A QH structure may
+ * be entered in either the non-periodic or periodic schedule.
+ */
+typedef struct dwc_otg_qh {
+       /**
+        * Endpoint type.
+        * One of the following values:
+        *      - UE_CONTROL
+        *      - UE_BULK
+        *      - UE_INTERRUPT
+        *      - UE_ISOCHRONOUS
+        */
+       uint8_t ep_type;
+       uint8_t ep_is_in;
+
+       /** wMaxPacketSize Field of Endpoint Descriptor. */
+       uint16_t maxp;
+
+       /**
+        * Device speed.
+        * One of the following values:
+        *      - DWC_OTG_EP_SPEED_LOW
+        *      - DWC_OTG_EP_SPEED_FULL
+        *      - DWC_OTG_EP_SPEED_HIGH
+        */
+       uint8_t dev_speed;
+
+       /**
+        * Determines the PID of the next data packet for non-control
+        * transfers. Ignored for control transfers.<br>
+        * One of the following values:
+        *      - DWC_OTG_HC_PID_DATA0
+        *      - DWC_OTG_HC_PID_DATA1
+        */
+       uint8_t data_toggle;
+
+       /** Ping state if 1. */
+       uint8_t ping_state;
+
+       /**
+        * List of QTDs for this QH.
+        */
+       struct dwc_otg_qtd_list qtd_list;
+
+       /** Host channel currently processing transfers for this QH. */
+       struct dwc_hc *channel;
+
+       /** Full/low speed endpoint on high-speed hub requires split. */
+       uint8_t do_split;
+
+       /** @name Periodic schedule information */
+       /** @{ */
+
+       /** Bandwidth in microseconds per (micro)frame. */
+       uint16_t usecs;
+
+       /** Interval between transfers in (micro)frames. */
+       uint16_t interval;
+
+       /**
+        * (micro)frame to initialize a periodic transfer. The transfer
+        * executes in the following (micro)frame.
+        */
+       uint16_t sched_frame;
+
+       /*
+       ** Frame a NAK was received on this queue head, used to minimise NAK retransmission
+       */
+       uint16_t nak_frame;
+
+       /** (micro)frame at which last start split was initialized. */
+       uint16_t start_split_frame;
+
+       /** @} */
+
+       /**
+        * Used instead of original buffer if
+        * it(physical address) is not dword-aligned.
+        */
+       uint8_t *dw_align_buf;
+       dwc_dma_t dw_align_buf_dma;
+
+       /** Entry for QH in either the periodic or non-periodic schedule. */
+       dwc_list_link_t qh_list_entry;
+
+       /** @name Descriptor DMA support */
+       /** @{ */
+
+       /** Descriptor List. */
+       dwc_otg_host_dma_desc_t *desc_list;
+
+       /** Descriptor List physical address. */
+       dwc_dma_t desc_list_dma;
+
+       /**
+        * Xfer Bytes array.
+        * Each element corresponds to a descriptor and indicates
+        * original XferSize size value for the descriptor.
+        */
+       uint32_t *n_bytes;
+
+       /** Actual number of transfer descriptors in a list. */
+       uint16_t ntd;
+
+       /** First activated isochronous transfer descriptor index. */
+       uint8_t td_first;
+       /** Last activated isochronous transfer descriptor index. */
+       uint8_t td_last;
+
+       /** @} */
+
+
+       uint16_t speed;
+       uint16_t frame_usecs[8];
+
+       uint32_t skip_count;
+} dwc_otg_qh_t;
+
+DWC_CIRCLEQ_HEAD(hc_list, dwc_hc);
+
+typedef struct urb_tq_entry {
+       struct urb *urb;
+       DWC_TAILQ_ENTRY(urb_tq_entry) urb_tq_entries;
+} urb_tq_entry_t;
+
+DWC_TAILQ_HEAD(urb_list, urb_tq_entry);
+
+/**
+ * This structure holds the state of the HCD, including the non-periodic and
+ * periodic schedules.
+ */
+struct dwc_otg_hcd {
+       /** The DWC otg device pointer */
+       struct dwc_otg_device *otg_dev;
+       /** DWC OTG Core Interface Layer */
+       dwc_otg_core_if_t *core_if;
+
+       /** Function HCD driver callbacks */
+       struct dwc_otg_hcd_function_ops *fops;
+
+       /** Internal DWC HCD Flags */
+       volatile union dwc_otg_hcd_internal_flags {
+               uint32_t d32;
+               struct {
+                       unsigned port_connect_status_change:1;
+                       unsigned port_connect_status:1;
+                       unsigned port_reset_change:1;
+                       unsigned port_enable_change:1;
+                       unsigned port_suspend_change:1;
+                       unsigned port_over_current_change:1;
+                       unsigned port_l1_change:1;
+                       unsigned port_speed:2;
+                       unsigned reserved:24;
+               } b;
+       } flags;
+
+       /**
+        * Inactive items in the non-periodic schedule. This is a list of
+        * Queue Heads. Transfers associated with these Queue Heads are not
+        * currently assigned to a host channel.
+        */
+       dwc_list_link_t non_periodic_sched_inactive;
+
+       /**
+        * Active items in the non-periodic schedule. This is a list of
+        * Queue Heads. Transfers associated with these Queue Heads are
+        * currently assigned to a host channel.
+        */
+       dwc_list_link_t non_periodic_sched_active;
+
+       /**
+        * Pointer to the next Queue Head to process in the active
+        * non-periodic schedule.
+        */
+       dwc_list_link_t *non_periodic_qh_ptr;
+
+       /**
+        * Inactive items in the periodic schedule. This is a list of QHs for
+        * periodic transfers that are _not_ scheduled for the next frame.
+        * Each QH in the list has an interval counter that determines when it
+        * needs to be scheduled for execution. This scheduling mechanism
+        * allows only a simple calculation for periodic bandwidth used (i.e.
+        * must assume that all periodic transfers may need to execute in the
+        * same frame). However, it greatly simplifies scheduling and should
+        * be sufficient for the vast majority of OTG hosts, which need to
+        * connect to a small number of peripherals at one time.
+        *
+        * Items move from this list to periodic_sched_ready when the QH
+        * interval counter is 0 at SOF.
+        */
+       dwc_list_link_t periodic_sched_inactive;
+
+       /**
+        * List of periodic QHs that are ready for execution in the next
+        * frame, but have not yet been assigned to host channels.
+        *
+        * Items move from this list to periodic_sched_assigned as host
+        * channels become available during the current frame.
+        */
+       dwc_list_link_t periodic_sched_ready;
+
+       /**
+        * List of periodic QHs to be executed in the next frame that are
+        * assigned to host channels.
+        *
+        * Items move from this list to periodic_sched_queued as the
+        * transactions for the QH are queued to the DWC_otg controller.
+        */
+       dwc_list_link_t periodic_sched_assigned;
+
+       /**
+        * List of periodic QHs that have been queued for execution.
+        *
+        * Items move from this list to either periodic_sched_inactive or
+        * periodic_sched_ready when the channel associated with the transfer
+        * is released. If the interval for the QH is 1, the item moves to
+        * periodic_sched_ready because it must be rescheduled for the next
+        * frame. Otherwise, the item moves to periodic_sched_inactive.
+        */
+       dwc_list_link_t periodic_sched_queued;
+
+       /**
+        * Total bandwidth claimed so far for periodic transfers. This value
+        * is in microseconds per (micro)frame. The assumption is that all
+        * periodic transfers may occur in the same (micro)frame.
+        */
+       uint16_t periodic_usecs;
+
+       /**
+        * Total bandwidth claimed so far for all periodic transfers
+        * in a frame.
+        * This will include a mixture of HS and FS transfers.
+        * Units are microseconds per (micro)frame.
+        * We have a budget per frame and have to schedule
+        * transactions accordingly.
+        * Watch out for the fact that things are actually scheduled for the
+        * "next frame".
+        */
+       uint16_t                frame_usecs[8];
+
+
+       /**
+        * Frame number read from the core at SOF. The value ranges from 0 to
+        * DWC_HFNUM_MAX_FRNUM.
+        */
+       uint16_t frame_number;
+
+       /**
+        * Count of periodic QHs, if using several eps. For SOF enable/disable.
+        */
+       uint16_t periodic_qh_count;
+
+       /**
+        * Free host channels in the controller. This is a list of
+        * dwc_hc_t items.
+        */
+       struct hc_list free_hc_list;
+       /**
+        * Number of host channels assigned to periodic transfers. Currently
+        * assuming that there is a dedicated host channel for each periodic
+        * transaction and at least one host channel available for
+        * non-periodic transactions.
+        */
+       int periodic_channels; /* microframe_schedule==0 */
+
+       /**
+        * Number of host channels assigned to non-periodic transfers.
+        */
+       int non_periodic_channels; /* microframe_schedule==0 */
+
+       /**
+        * Number of host channels assigned to non-periodic transfers.
+        */
+       int available_host_channels;
+
+       /**
+        * Array of pointers to the host channel descriptors. Allows accessing
+        * a host channel descriptor given the host channel number. This is
+        * useful in interrupt handlers.
+        */
+       struct dwc_hc *hc_ptr_array[MAX_EPS_CHANNELS];
+
+       /**
+        * Buffer to use for any data received during the status phase of a
+        * control transfer. Normally no data is transferred during the status
+        * phase. This buffer is used as a bit bucket.
+        */
+       uint8_t *status_buf;
+
+       /**
+        * DMA address for status_buf.
+        */
+       dma_addr_t status_buf_dma;
+#define DWC_OTG_HCD_STATUS_BUF_SIZE 64
+
+       /**
+        * Connection timer. An OTG host must display a message if the device
+        * does not connect. Started when the VBus power is turned on via
+        * sysfs attribute "buspower".
+        */
+       dwc_timer_t *conn_timer;
+
+       /* Tasket to do a reset */
+       dwc_tasklet_t *reset_tasklet;
+
+       dwc_tasklet_t *completion_tasklet;
+       struct urb_list completed_urb_list;
+
+       /*  */
+       dwc_spinlock_t *lock;
+       /**
+        * Private data that could be used by OS wrapper.
+        */
+       void *priv;
+
+       uint8_t otg_port;
+
+       /** Frame List */
+       uint32_t *frame_list;
+
+       /** Hub - Port assignment */
+       int hub_port[128];
+#ifdef FIQ_DEBUG
+       int hub_port_alloc[2048];
+#endif
+
+       /** Frame List DMA address */
+       dma_addr_t frame_list_dma;
+
+       struct fiq_stack *fiq_stack;
+       struct fiq_state *fiq_state;
+
+       /** Virtual address for split transaction DMA bounce buffers */
+       struct fiq_dma_blob *fiq_dmab;
+
+#ifdef DEBUG
+       uint32_t frrem_samples;
+       uint64_t frrem_accum;
+
+       uint32_t hfnum_7_samples_a;
+       uint64_t hfnum_7_frrem_accum_a;
+       uint32_t hfnum_0_samples_a;
+       uint64_t hfnum_0_frrem_accum_a;
+       uint32_t hfnum_other_samples_a;
+       uint64_t hfnum_other_frrem_accum_a;
+
+       uint32_t hfnum_7_samples_b;
+       uint64_t hfnum_7_frrem_accum_b;
+       uint32_t hfnum_0_samples_b;
+       uint64_t hfnum_0_frrem_accum_b;
+       uint32_t hfnum_other_samples_b;
+       uint64_t hfnum_other_frrem_accum_b;
+#endif
+};
+
+static inline struct device *dwc_otg_hcd_to_dev(struct dwc_otg_hcd *hcd)
+{
+       return &hcd->otg_dev->os_dep.platformdev->dev;
+}
+
+/** @name Transaction Execution Functions */
+/** @{ */
+extern dwc_otg_transaction_type_e dwc_otg_hcd_select_transactions(dwc_otg_hcd_t
+                                                                 * hcd);
+extern void dwc_otg_hcd_queue_transactions(dwc_otg_hcd_t * hcd,
+                                          dwc_otg_transaction_type_e tr_type);
+
+int dwc_otg_hcd_allocate_port(dwc_otg_hcd_t * hcd, dwc_otg_qh_t *qh);
+void dwc_otg_hcd_release_port(dwc_otg_hcd_t * dwc_otg_hcd, dwc_otg_qh_t *qh);
+
+extern int fiq_fsm_queue_transaction(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh);
+extern int fiq_fsm_transaction_suitable(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh);
+extern void dwc_otg_cleanup_fiq_channel(dwc_otg_hcd_t *hcd, uint32_t num);
+
+/** @} */
+
+/** @name Interrupt Handler Functions */
+/** @{ */
+extern int32_t dwc_otg_hcd_handle_intr(dwc_otg_hcd_t * dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_sof_intr(dwc_otg_hcd_t * dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_rx_status_q_level_intr(dwc_otg_hcd_t *
+                                                        dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_np_tx_fifo_empty_intr(dwc_otg_hcd_t *
+                                                       dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_perio_tx_fifo_empty_intr(dwc_otg_hcd_t *
+                                                          dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_incomplete_periodic_intr(dwc_otg_hcd_t *
+                                                          dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_port_intr(dwc_otg_hcd_t * dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_conn_id_status_change_intr(dwc_otg_hcd_t *
+                                                            dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_disconnect_intr(dwc_otg_hcd_t * dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_hc_intr(dwc_otg_hcd_t * dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_hc_n_intr(dwc_otg_hcd_t * dwc_otg_hcd,
+                                           uint32_t num);
+extern int32_t dwc_otg_hcd_handle_session_req_intr(dwc_otg_hcd_t * dwc_otg_hcd);
+extern int32_t dwc_otg_hcd_handle_wakeup_detected_intr(dwc_otg_hcd_t *
+                                                      dwc_otg_hcd);
+/** @} */
+
+/** @name Schedule Queue Functions */
+/** @{ */
+
+/* Implemented in dwc_otg_hcd_queue.c */
+extern dwc_otg_qh_t *dwc_otg_hcd_qh_create(dwc_otg_hcd_t * hcd,
+                                          dwc_otg_hcd_urb_t * urb, int atomic_alloc);
+extern void dwc_otg_hcd_qh_free(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh);
+extern int dwc_otg_hcd_qh_add(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh);
+extern void dwc_otg_hcd_qh_remove(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh);
+extern void dwc_otg_hcd_qh_deactivate(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh,
+                                     int sched_csplit);
+
+/** Remove and free a QH */
+static inline void dwc_otg_hcd_qh_remove_and_free(dwc_otg_hcd_t * hcd,
+                                                 dwc_otg_qh_t * qh)
+{
+       dwc_irqflags_t flags;
+       DWC_SPINLOCK_IRQSAVE(hcd->lock, &flags);
+       dwc_otg_hcd_qh_remove(hcd, qh);
+       DWC_SPINUNLOCK_IRQRESTORE(hcd->lock, flags);
+       dwc_otg_hcd_qh_free(hcd, qh);
+}
+
+/** Allocates memory for a QH structure.
+ * @return Returns the memory allocate or NULL on error. */
+static inline dwc_otg_qh_t *dwc_otg_hcd_qh_alloc(int atomic_alloc)
+{
+       if (atomic_alloc)
+               return (dwc_otg_qh_t *) DWC_ALLOC_ATOMIC(sizeof(dwc_otg_qh_t));
+       else
+               return (dwc_otg_qh_t *) DWC_ALLOC(sizeof(dwc_otg_qh_t));
+}
+
+extern dwc_otg_qtd_t *dwc_otg_hcd_qtd_create(dwc_otg_hcd_urb_t * urb,
+                                            int atomic_alloc);
+extern void dwc_otg_hcd_qtd_init(dwc_otg_qtd_t * qtd, dwc_otg_hcd_urb_t * urb);
+extern int dwc_otg_hcd_qtd_add(dwc_otg_qtd_t * qtd, dwc_otg_hcd_t * dwc_otg_hcd,
+                              dwc_otg_qh_t ** qh, int atomic_alloc);
+
+/** Allocates memory for a QTD structure.
+ * @return Returns the memory allocate or NULL on error. */
+static inline dwc_otg_qtd_t *dwc_otg_hcd_qtd_alloc(int atomic_alloc)
+{
+       if (atomic_alloc)
+               return (dwc_otg_qtd_t *) DWC_ALLOC_ATOMIC(sizeof(dwc_otg_qtd_t));
+       else
+               return (dwc_otg_qtd_t *) DWC_ALLOC(sizeof(dwc_otg_qtd_t));
+}
+
+/** Frees the memory for a QTD structure.  QTD should already be removed from
+ * list.
+ * @param qtd QTD to free.*/
+static inline void dwc_otg_hcd_qtd_free(dwc_otg_qtd_t * qtd)
+{
+       DWC_FREE(qtd);
+}
+
+/** Removes a QTD from list.
+ * @param hcd HCD instance.
+ * @param qtd QTD to remove from list.
+ * @param qh QTD belongs to.
+ */
+static inline void dwc_otg_hcd_qtd_remove(dwc_otg_hcd_t * hcd,
+                                         dwc_otg_qtd_t * qtd,
+                                         dwc_otg_qh_t * qh)
+{
+       DWC_CIRCLEQ_REMOVE(&qh->qtd_list, qtd, qtd_list_entry);
+}
+
+/** Remove and free a QTD
+  * Need to disable IRQ and hold hcd lock while calling this function out of
+  * interrupt servicing chain */
+static inline void dwc_otg_hcd_qtd_remove_and_free(dwc_otg_hcd_t * hcd,
+                                                  dwc_otg_qtd_t * qtd,
+                                                  dwc_otg_qh_t * qh)
+{
+       dwc_otg_hcd_qtd_remove(hcd, qtd, qh);
+       dwc_otg_hcd_qtd_free(qtd);
+}
+
+/** @} */
+
+/** @name Descriptor DMA Supporting Functions */
+/** @{ */
+
+extern void dwc_otg_hcd_start_xfer_ddma(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh);
+extern void dwc_otg_hcd_complete_xfer_ddma(dwc_otg_hcd_t * hcd,
+                                          dwc_hc_t * hc,
+                                          dwc_otg_hc_regs_t * hc_regs,
+                                          dwc_otg_halt_status_e halt_status);
+
+extern int dwc_otg_hcd_qh_init_ddma(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh);
+extern void dwc_otg_hcd_qh_free_ddma(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh);
+
+/** @} */
+
+/** @name Internal Functions */
+/** @{ */
+dwc_otg_qh_t *dwc_urb_to_qh(dwc_otg_hcd_urb_t * urb);
+/** @} */
+
+#ifdef CONFIG_USB_DWC_OTG_LPM
+extern int dwc_otg_hcd_get_hc_for_lpm_tran(dwc_otg_hcd_t * hcd,
+                                          uint8_t devaddr);
+extern void dwc_otg_hcd_free_hc_from_lpm(dwc_otg_hcd_t * hcd);
+#endif
+
+/** Gets the QH that contains the list_head */
+#define dwc_list_to_qh(_list_head_ptr_) container_of(_list_head_ptr_, dwc_otg_qh_t, qh_list_entry)
+
+/** Gets the QTD that contains the list_head */
+#define dwc_list_to_qtd(_list_head_ptr_) container_of(_list_head_ptr_, dwc_otg_qtd_t, qtd_list_entry)
+
+/** Check if QH is non-periodic  */
+#define dwc_qh_is_non_per(_qh_ptr_) ((_qh_ptr_->ep_type == UE_BULK) || \
+                                    (_qh_ptr_->ep_type == UE_CONTROL))
+
+/** High bandwidth multiplier as encoded in highspeed endpoint descriptors */
+#define dwc_hb_mult(wMaxPacketSize) (1 + (((wMaxPacketSize) >> 11) & 0x03))
+
+/** Packet size for any kind of endpoint descriptor */
+#define dwc_max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
+
+/**
+ * Returns true if _frame1 is less than or equal to _frame2. The comparison is
+ * done modulo DWC_HFNUM_MAX_FRNUM. This accounts for the rollover of the
+ * frame number when the max frame number is reached.
+ */
+static inline int dwc_frame_num_le(uint16_t frame1, uint16_t frame2)
+{
+       return ((frame2 - frame1) & DWC_HFNUM_MAX_FRNUM) <=
+           (DWC_HFNUM_MAX_FRNUM >> 1);
+}
+
+/**
+ * Returns true if _frame1 is greater than _frame2. The comparison is done
+ * modulo DWC_HFNUM_MAX_FRNUM. This accounts for the rollover of the frame
+ * number when the max frame number is reached.
+ */
+static inline int dwc_frame_num_gt(uint16_t frame1, uint16_t frame2)
+{
+       return (frame1 != frame2) &&
+           (((frame1 - frame2) & DWC_HFNUM_MAX_FRNUM) <
+            (DWC_HFNUM_MAX_FRNUM >> 1));
+}
+
+/**
+ * Increments _frame by the amount specified by _inc. The addition is done
+ * modulo DWC_HFNUM_MAX_FRNUM. Returns the incremented value.
+ */
+static inline uint16_t dwc_frame_num_inc(uint16_t frame, uint16_t inc)
+{
+       return (frame + inc) & DWC_HFNUM_MAX_FRNUM;
+}
+
+static inline uint16_t dwc_full_frame_num(uint16_t frame)
+{
+       return (frame & DWC_HFNUM_MAX_FRNUM) >> 3;
+}
+
+static inline uint16_t dwc_micro_frame_num(uint16_t frame)
+{
+       return frame & 0x7;
+}
+
+extern void init_hcd_usecs(dwc_otg_hcd_t *_hcd);
+
+void dwc_otg_hcd_save_data_toggle(dwc_hc_t * hc,
+                                 dwc_otg_hc_regs_t * hc_regs,
+                                 dwc_otg_qtd_t * qtd);
+
+#ifdef DEBUG
+/**
+ * Macro to sample the remaining PHY clocks left in the current frame. This
+ * may be used during debugging to determine the average time it takes to
+ * execute sections of code. There are two possible sample points, "a" and
+ * "b", so the _letter argument must be one of these values.
+ *
+ * To dump the average sample times, read the "hcd_frrem" sysfs attribute. For
+ * example, "cat /sys/devices/lm0/hcd_frrem".
+ */
+#define dwc_sample_frrem(_hcd, _qh, _letter) \
+{ \
+       hfnum_data_t hfnum; \
+       dwc_otg_qtd_t *qtd; \
+       qtd = list_entry(_qh->qtd_list.next, dwc_otg_qtd_t, qtd_list_entry); \
+       if (usb_pipeint(qtd->urb->pipe) && _qh->start_split_frame != 0 && !qtd->complete_split) { \
+               hfnum.d32 = DWC_READ_REG32(&_hcd->core_if->host_if->host_global_regs->hfnum); \
+               switch (hfnum.b.frnum & 0x7) { \
+               case 7: \
+                       _hcd->hfnum_7_samples_##_letter++; \
+                       _hcd->hfnum_7_frrem_accum_##_letter += hfnum.b.frrem; \
+                       break; \
+               case 0: \
+                       _hcd->hfnum_0_samples_##_letter++; \
+                       _hcd->hfnum_0_frrem_accum_##_letter += hfnum.b.frrem; \
+                       break; \
+               default: \
+                       _hcd->hfnum_other_samples_##_letter++; \
+                       _hcd->hfnum_other_frrem_accum_##_letter += hfnum.b.frrem; \
+                       break; \
+               } \
+       } \
+}
+#else
+#define dwc_sample_frrem(_hcd, _qh, _letter)
+#endif
+#endif
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_ddma.c
@@ -0,0 +1,1134 @@
+/*==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_ddma.c $
+ * $Revision: #10 $
+ * $Date: 2011/10/20 $
+ * $Change: 1869464 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_DEVICE_ONLY
+
+/** @file
+ * This file contains Descriptor DMA support implementation for host mode.
+ */
+
+#include "dwc_otg_hcd.h"
+#include "dwc_otg_regs.h"
+
+extern bool microframe_schedule;
+
+static inline uint8_t frame_list_idx(uint16_t frame)
+{
+       return (frame & (MAX_FRLIST_EN_NUM - 1));
+}
+
+static inline uint16_t desclist_idx_inc(uint16_t idx, uint16_t inc, uint8_t speed)
+{
+       return (idx + inc) &
+           (((speed ==
+              DWC_OTG_EP_SPEED_HIGH) ? MAX_DMA_DESC_NUM_HS_ISOC :
+             MAX_DMA_DESC_NUM_GENERIC) - 1);
+}
+
+static inline uint16_t desclist_idx_dec(uint16_t idx, uint16_t inc, uint8_t speed)
+{
+       return (idx - inc) &
+           (((speed ==
+              DWC_OTG_EP_SPEED_HIGH) ? MAX_DMA_DESC_NUM_HS_ISOC :
+             MAX_DMA_DESC_NUM_GENERIC) - 1);
+}
+
+static inline uint16_t max_desc_num(dwc_otg_qh_t * qh)
+{
+       return (((qh->ep_type == UE_ISOCHRONOUS)
+                && (qh->dev_speed == DWC_OTG_EP_SPEED_HIGH))
+               ? MAX_DMA_DESC_NUM_HS_ISOC : MAX_DMA_DESC_NUM_GENERIC);
+}
+static inline uint16_t frame_incr_val(dwc_otg_qh_t * qh)
+{
+       return ((qh->dev_speed == DWC_OTG_EP_SPEED_HIGH)
+               ? ((qh->interval + 8 - 1) / 8)
+               : qh->interval);
+}
+
+static int desc_list_alloc(struct device *dev, dwc_otg_qh_t * qh)
+{
+       int retval = 0;
+
+       qh->desc_list = (dwc_otg_host_dma_desc_t *)
+           DWC_DMA_ALLOC(dev, sizeof(dwc_otg_host_dma_desc_t) * max_desc_num(qh),
+                         &qh->desc_list_dma);
+
+       if (!qh->desc_list) {
+               retval = -DWC_E_NO_MEMORY;
+               DWC_ERROR("%s: DMA descriptor list allocation failed\n", __func__);
+
+       }
+
+       dwc_memset(qh->desc_list, 0x00,
+                  sizeof(dwc_otg_host_dma_desc_t) * max_desc_num(qh));
+
+       qh->n_bytes =
+           (uint32_t *) DWC_ALLOC(sizeof(uint32_t) * max_desc_num(qh));
+
+       if (!qh->n_bytes) {
+               retval = -DWC_E_NO_MEMORY;
+               DWC_ERROR
+                   ("%s: Failed to allocate array for descriptors' size actual values\n",
+                    __func__);
+
+       }
+       return retval;
+
+}
+
+static void desc_list_free(struct device *dev, dwc_otg_qh_t * qh)
+{
+       if (qh->desc_list) {
+               DWC_DMA_FREE(dev, max_desc_num(qh), qh->desc_list,
+                            qh->desc_list_dma);
+               qh->desc_list = NULL;
+       }
+
+       if (qh->n_bytes) {
+               DWC_FREE(qh->n_bytes);
+               qh->n_bytes = NULL;
+       }
+}
+
+static int frame_list_alloc(dwc_otg_hcd_t * hcd)
+{
+       struct device *dev = dwc_otg_hcd_to_dev(hcd);
+       int retval = 0;
+
+       if (hcd->frame_list)
+               return 0;
+
+       hcd->frame_list = DWC_DMA_ALLOC(dev, 4 * MAX_FRLIST_EN_NUM,
+                                       &hcd->frame_list_dma);
+       if (!hcd->frame_list) {
+               retval = -DWC_E_NO_MEMORY;
+               DWC_ERROR("%s: Frame List allocation failed\n", __func__);
+       }
+
+       dwc_memset(hcd->frame_list, 0x00, 4 * MAX_FRLIST_EN_NUM);
+
+       return retval;
+}
+
+static void frame_list_free(dwc_otg_hcd_t * hcd)
+{
+       struct device *dev = dwc_otg_hcd_to_dev(hcd);
+
+       if (!hcd->frame_list)
+               return;
+
+       DWC_DMA_FREE(dev, 4 * MAX_FRLIST_EN_NUM, hcd->frame_list, hcd->frame_list_dma);
+       hcd->frame_list = NULL;
+}
+
+static void per_sched_enable(dwc_otg_hcd_t * hcd, uint16_t fr_list_en)
+{
+
+       hcfg_data_t hcfg;
+
+       hcfg.d32 = DWC_READ_REG32(&hcd->core_if->host_if->host_global_regs->hcfg);
+
+       if (hcfg.b.perschedena) {
+               /* already enabled */
+               return;
+       }
+
+       DWC_WRITE_REG32(&hcd->core_if->host_if->host_global_regs->hflbaddr,
+                       hcd->frame_list_dma);
+
+       switch (fr_list_en) {
+       case 64:
+               hcfg.b.frlisten = 3;
+               break;
+       case 32:
+               hcfg.b.frlisten = 2;
+               break;
+       case 16:
+               hcfg.b.frlisten = 1;
+               break;
+       case 8:
+               hcfg.b.frlisten = 0;
+               break;
+       default:
+               break;
+       }
+
+       hcfg.b.perschedena = 1;
+
+       DWC_DEBUGPL(DBG_HCD, "Enabling Periodic schedule\n");
+       DWC_WRITE_REG32(&hcd->core_if->host_if->host_global_regs->hcfg, hcfg.d32);
+
+}
+
+static void per_sched_disable(dwc_otg_hcd_t * hcd)
+{
+       hcfg_data_t hcfg;
+
+       hcfg.d32 = DWC_READ_REG32(&hcd->core_if->host_if->host_global_regs->hcfg);
+
+       if (!hcfg.b.perschedena) {
+               /* already disabled */
+               return;
+       }
+       hcfg.b.perschedena = 0;
+
+       DWC_DEBUGPL(DBG_HCD, "Disabling Periodic schedule\n");
+       DWC_WRITE_REG32(&hcd->core_if->host_if->host_global_regs->hcfg, hcfg.d32);
+}
+
+/*
+ * Activates/Deactivates FrameList entries for the channel
+ * based on endpoint servicing period.
+ */
+void update_frame_list(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh, uint8_t enable)
+{
+       uint16_t i, j, inc;
+       dwc_hc_t *hc = NULL;
+
+       if (!qh->channel) {
+               DWC_ERROR("qh->channel = %p", qh->channel);
+               return;
+       }
+
+       if (!hcd) {
+               DWC_ERROR("------hcd = %p", hcd);
+               return;
+       }
+
+       if (!hcd->frame_list) {
+               DWC_ERROR("-------hcd->frame_list = %p", hcd->frame_list);
+               return;
+       }
+
+       hc = qh->channel;
+       inc = frame_incr_val(qh);
+       if (qh->ep_type == UE_ISOCHRONOUS)
+               i = frame_list_idx(qh->sched_frame);
+       else
+               i = 0;
+
+       j = i;
+       do {
+               if (enable)
+                       hcd->frame_list[j] |= (1 << hc->hc_num);
+               else
+                       hcd->frame_list[j] &= ~(1 << hc->hc_num);
+               j = (j + inc) & (MAX_FRLIST_EN_NUM - 1);
+       }
+       while (j != i);
+       if (!enable)
+               return;
+       hc->schinfo = 0;
+       if (qh->channel->speed == DWC_OTG_EP_SPEED_HIGH) {
+               j = 1;
+               /* TODO - check this */
+               inc = (8 + qh->interval - 1) / qh->interval;
+               for (i = 0; i < inc; i++) {
+                       hc->schinfo |= j;
+                       j = j << qh->interval;
+               }
+       } else {
+               hc->schinfo = 0xff;
+       }
+}
+
+#if 1
+void dump_frame_list(dwc_otg_hcd_t * hcd)
+{
+       int i = 0;
+       DWC_PRINTF("--FRAME LIST (hex) --\n");
+       for (i = 0; i < MAX_FRLIST_EN_NUM; i++) {
+               DWC_PRINTF("%x\t", hcd->frame_list[i]);
+               if (!(i % 8) && i)
+                       DWC_PRINTF("\n");
+       }
+       DWC_PRINTF("\n----\n");
+
+}
+#endif
+
+static void release_channel_ddma(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       dwc_hc_t *hc = qh->channel;
+       if (dwc_qh_is_non_per(qh)) {
+               if (!microframe_schedule)
+                       hcd->non_periodic_channels--;
+               else
+                       hcd->available_host_channels++;
+       } else
+               update_frame_list(hcd, qh, 0);
+
+       /*
+        * The condition is added to prevent double cleanup try in case of device
+        * disconnect. See channel cleanup in dwc_otg_hcd_disconnect_cb().
+        */
+       if (hc->qh) {
+               dwc_otg_hc_cleanup(hcd->core_if, hc);
+               DWC_CIRCLEQ_INSERT_TAIL(&hcd->free_hc_list, hc, hc_list_entry);
+               hc->qh = NULL;
+       }
+
+       qh->channel = NULL;
+       qh->ntd = 0;
+
+       if (qh->desc_list) {
+               dwc_memset(qh->desc_list, 0x00,
+                          sizeof(dwc_otg_host_dma_desc_t) * max_desc_num(qh));
+       }
+}
+
+/**
+ * Initializes a QH structure's Descriptor DMA related members.
+ * Allocates memory for descriptor list.
+ * On first periodic QH, allocates memory for FrameList
+ * and enables periodic scheduling.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh The QH to init.
+ *
+ * @return 0 if successful, negative error code otherwise.
+ */
+int dwc_otg_hcd_qh_init_ddma(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       struct device *dev = dwc_otg_hcd_to_dev(hcd);
+       int retval = 0;
+
+       if (qh->do_split) {
+               DWC_ERROR("SPLIT Transfers are not supported in Descriptor DMA.\n");
+               return -1;
+       }
+
+       retval = desc_list_alloc(dev, qh);
+
+       if ((retval == 0)
+           && (qh->ep_type == UE_ISOCHRONOUS || qh->ep_type == UE_INTERRUPT)) {
+               if (!hcd->frame_list) {
+                       retval = frame_list_alloc(hcd);
+                       /* Enable periodic schedule on first periodic QH */
+                       if (retval == 0)
+                               per_sched_enable(hcd, MAX_FRLIST_EN_NUM);
+               }
+       }
+
+       qh->ntd = 0;
+
+       return retval;
+}
+
+/**
+ * Frees descriptor list memory associated with the QH.
+ * If QH is periodic and the last, frees FrameList memory
+ * and disables periodic scheduling.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh The QH to init.
+ */
+void dwc_otg_hcd_qh_free_ddma(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       struct device *dev = dwc_otg_hcd_to_dev(hcd);
+
+       desc_list_free(dev, qh);
+
+       /*
+        * Channel still assigned due to some reasons.
+        * Seen on Isoc URB dequeue. Channel halted but no subsequent
+        * ChHalted interrupt to release the channel. Afterwards
+        * when it comes here from endpoint disable routine
+        * channel remains assigned.
+        */
+       if (qh->channel)
+               release_channel_ddma(hcd, qh);
+
+       if ((qh->ep_type == UE_ISOCHRONOUS || qh->ep_type == UE_INTERRUPT)
+           && (microframe_schedule || !hcd->periodic_channels) && hcd->frame_list) {
+
+               per_sched_disable(hcd);
+               frame_list_free(hcd);
+       }
+}
+
+static uint8_t frame_to_desc_idx(dwc_otg_qh_t * qh, uint16_t frame_idx)
+{
+       if (qh->dev_speed == DWC_OTG_EP_SPEED_HIGH) {
+               /*
+                * Descriptor set(8 descriptors) index
+                * which is 8-aligned.
+                */
+               return (frame_idx & ((MAX_DMA_DESC_NUM_HS_ISOC / 8) - 1)) * 8;
+       } else {
+               return (frame_idx & (MAX_DMA_DESC_NUM_GENERIC - 1));
+       }
+}
+
+/*
+ * Determine starting frame for Isochronous transfer.
+ * Few frames skipped to prevent race condition with HC.
+ */
+static uint8_t calc_starting_frame(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh,
+                                  uint8_t * skip_frames)
+{
+       uint16_t frame = 0;
+       hcd->frame_number = dwc_otg_hcd_get_frame_number(hcd);
+
+       /* sched_frame is always frame number(not uFrame) both in FS and HS !! */
+
+       /*
+        * skip_frames is used to limit activated descriptors number
+        * to avoid the situation when HC services the last activated
+        * descriptor firstly.
+        * Example for FS:
+        * Current frame is 1, scheduled frame is 3. Since HC always fetches the descriptor
+        * corresponding to curr_frame+1, the descriptor corresponding to frame 2
+        * will be fetched. If the number of descriptors is max=64 (or greather) the
+        * list will be fully programmed with Active descriptors and it is possible
+        * case(rare) that the latest descriptor(considering rollback) corresponding
+        * to frame 2 will be serviced first. HS case is more probable because, in fact,
+        * up to 11 uframes(16 in the code) may be skipped.
+        */
+       if (qh->dev_speed == DWC_OTG_EP_SPEED_HIGH) {
+               /*
+                * Consider uframe counter also, to start xfer asap.
+                * If half of the frame elapsed skip 2 frames otherwise
+                * just 1 frame.
+                * Starting descriptor index must be 8-aligned, so
+                * if the current frame is near to complete the next one
+                * is skipped as well.
+                */
+
+               if (dwc_micro_frame_num(hcd->frame_number) >= 5) {
+                       *skip_frames = 2 * 8;
+                       frame = dwc_frame_num_inc(hcd->frame_number, *skip_frames);
+               } else {
+                       *skip_frames = 1 * 8;
+                       frame = dwc_frame_num_inc(hcd->frame_number, *skip_frames);
+               }
+
+               frame = dwc_full_frame_num(frame);
+       } else {
+               /*
+                * Two frames are skipped for FS - the current and the next.
+                * But for descriptor programming, 1 frame(descriptor) is enough,
+                * see example above.
+                */
+               *skip_frames = 1;
+               frame = dwc_frame_num_inc(hcd->frame_number, 2);
+       }
+
+       return frame;
+}
+
+/*
+ * Calculate initial descriptor index for isochronous transfer
+ * based on scheduled frame.
+ */
+static uint8_t recalc_initial_desc_idx(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       uint16_t frame = 0, fr_idx, fr_idx_tmp;
+       uint8_t skip_frames = 0;
+       /*
+        * With current ISOC processing algorithm the channel is being
+        * released when no more QTDs in the list(qh->ntd == 0).
+        * Thus this function is called only when qh->ntd == 0 and qh->channel == 0.
+        *
+        * So qh->channel != NULL branch is not used and just not removed from the
+        * source file. It is required for another possible approach which is,
+        * do not disable and release the channel when ISOC session completed,
+        * just move QH to inactive schedule until new QTD arrives.
+        * On new QTD, the QH moved back to 'ready' schedule,
+        * starting frame and therefore starting desc_index are recalculated.
+        * In this case channel is released only on ep_disable.
+        */
+
+       /* Calculate starting descriptor index. For INTERRUPT endpoint it is always 0. */
+       if (qh->channel) {
+               frame = calc_starting_frame(hcd, qh, &skip_frames);
+               /*
+                * Calculate initial descriptor index based on FrameList current bitmap
+                * and servicing period.
+                */
+               fr_idx_tmp = frame_list_idx(frame);
+               fr_idx =
+                   (MAX_FRLIST_EN_NUM + frame_list_idx(qh->sched_frame) -
+                    fr_idx_tmp)
+                   % frame_incr_val(qh);
+               fr_idx = (fr_idx + fr_idx_tmp) % MAX_FRLIST_EN_NUM;
+       } else {
+               qh->sched_frame = calc_starting_frame(hcd, qh, &skip_frames);
+               fr_idx = frame_list_idx(qh->sched_frame);
+       }
+
+       qh->td_first = qh->td_last = frame_to_desc_idx(qh, fr_idx);
+
+       return skip_frames;
+}
+
+#define        ISOC_URB_GIVEBACK_ASAP
+
+#define MAX_ISOC_XFER_SIZE_FS 1023
+#define MAX_ISOC_XFER_SIZE_HS 3072
+#define DESCNUM_THRESHOLD 4
+
+static void init_isoc_dma_desc(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh,
+                              uint8_t skip_frames)
+{
+       struct dwc_otg_hcd_iso_packet_desc *frame_desc;
+       dwc_otg_qtd_t *qtd;
+       dwc_otg_host_dma_desc_t *dma_desc;
+       uint16_t idx, inc, n_desc, ntd_max, max_xfer_size;
+
+       idx = qh->td_last;
+       inc = qh->interval;
+       n_desc = 0;
+
+       ntd_max = (max_desc_num(qh) + qh->interval - 1) / qh->interval;
+       if (skip_frames && !qh->channel)
+               ntd_max = ntd_max - skip_frames / qh->interval;
+
+       max_xfer_size =
+           (qh->dev_speed ==
+            DWC_OTG_EP_SPEED_HIGH) ? MAX_ISOC_XFER_SIZE_HS :
+           MAX_ISOC_XFER_SIZE_FS;
+
+       DWC_CIRCLEQ_FOREACH(qtd, &qh->qtd_list, qtd_list_entry) {
+               while ((qh->ntd < ntd_max)
+                      && (qtd->isoc_frame_index_last <
+                          qtd->urb->packet_count)) {
+
+                       dma_desc = &qh->desc_list[idx];
+                       dwc_memset(dma_desc, 0x00, sizeof(dwc_otg_host_dma_desc_t));
+
+                       frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index_last];
+
+                       if (frame_desc->length > max_xfer_size)
+                               qh->n_bytes[idx] = max_xfer_size;
+                       else
+                               qh->n_bytes[idx] = frame_desc->length;
+                       dma_desc->status.b_isoc.n_bytes = qh->n_bytes[idx];
+                       dma_desc->status.b_isoc.a = 1;
+                       dma_desc->status.b_isoc.sts = 0;
+
+                       dma_desc->buf = qtd->urb->dma + frame_desc->offset;
+
+                       qh->ntd++;
+
+                       qtd->isoc_frame_index_last++;
+
+#ifdef ISOC_URB_GIVEBACK_ASAP
+                       /*
+                        * Set IOC for each descriptor corresponding to the
+                        * last frame of the URB.
+                        */
+                       if (qtd->isoc_frame_index_last ==
+                           qtd->urb->packet_count)
+                               dma_desc->status.b_isoc.ioc = 1;
+
+#endif
+                       idx = desclist_idx_inc(idx, inc, qh->dev_speed);
+                       n_desc++;
+
+               }
+               qtd->in_process = 1;
+       }
+
+       qh->td_last = idx;
+
+#ifdef ISOC_URB_GIVEBACK_ASAP
+       /* Set IOC for the last descriptor if descriptor list is full */
+       if (qh->ntd == ntd_max) {
+               idx = desclist_idx_dec(qh->td_last, inc, qh->dev_speed);
+               qh->desc_list[idx].status.b_isoc.ioc = 1;
+       }
+#else
+       /*
+        * Set IOC bit only for one descriptor.
+        * Always try to be ahead of HW processing,
+        * i.e. on IOC generation driver activates next descriptors but
+        * core continues to process descriptors followed the one with IOC set.
+        */
+
+       if (n_desc > DESCNUM_THRESHOLD) {
+               /*
+                * Move IOC "up". Required even if there is only one QTD
+                * in the list, cause QTDs migth continue to be queued,
+                * but during the activation it was only one queued.
+                * Actually more than one QTD might be in the list if this function called
+                * from XferCompletion - QTDs was queued during HW processing of the previous
+                * descriptor chunk.
+                */
+               idx = dwc_desclist_idx_dec(idx, inc * ((qh->ntd + 1) / 2), qh->dev_speed);
+       } else {
+               /*
+                * Set the IOC for the latest descriptor
+                * if either number of descriptor is not greather than threshold
+                * or no more new descriptors activated.
+                */
+               idx = dwc_desclist_idx_dec(qh->td_last, inc, qh->dev_speed);
+       }
+
+       qh->desc_list[idx].status.b_isoc.ioc = 1;
+#endif
+}
+
+static void init_non_isoc_dma_desc(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+
+       dwc_hc_t *hc;
+       dwc_otg_host_dma_desc_t *dma_desc;
+       dwc_otg_qtd_t *qtd;
+       int num_packets, len, n_desc = 0;
+
+       hc = qh->channel;
+
+       /*
+        * Start with hc->xfer_buff initialized in
+        * assign_and_init_hc(), then if SG transfer consists of multiple URBs,
+        * this pointer re-assigned to the buffer of the currently processed QTD.
+        * For non-SG request there is always one QTD active.
+        */
+
+       DWC_CIRCLEQ_FOREACH(qtd, &qh->qtd_list, qtd_list_entry) {
+
+               if (n_desc) {
+                       /* SG request - more than 1 QTDs */
+                       hc->xfer_buff = (uint8_t *)qtd->urb->dma + qtd->urb->actual_length;
+                       hc->xfer_len = qtd->urb->length - qtd->urb->actual_length;
+               }
+
+               qtd->n_desc = 0;
+
+               do {
+                       dma_desc = &qh->desc_list[n_desc];
+                       len = hc->xfer_len;
+
+                       if (len > MAX_DMA_DESC_SIZE)
+                               len = MAX_DMA_DESC_SIZE - hc->max_packet + 1;
+
+                       if (hc->ep_is_in) {
+                               if (len > 0) {
+                                       num_packets = (len + hc->max_packet - 1) / hc->max_packet;
+                               } else {
+                                       /* Need 1 packet for transfer length of 0. */
+                                       num_packets = 1;
+                               }
+                               /* Always program an integral # of max packets for IN transfers. */
+                               len = num_packets * hc->max_packet;
+                       }
+
+                       dma_desc->status.b.n_bytes = len;
+
+                       qh->n_bytes[n_desc] = len;
+
+                       if ((qh->ep_type == UE_CONTROL)
+                           && (qtd->control_phase == DWC_OTG_CONTROL_SETUP))
+                               dma_desc->status.b.sup = 1;     /* Setup Packet */
+
+                       dma_desc->status.b.a = 1;       /* Active descriptor */
+                       dma_desc->status.b.sts = 0;
+
+                       dma_desc->buf =
+                           ((unsigned long)hc->xfer_buff & 0xffffffff);
+
+                       /*
+                        * Last descriptor(or single) of IN transfer
+                        * with actual size less than MaxPacket.
+                        */
+                       if (len > hc->xfer_len) {
+                               hc->xfer_len = 0;
+                       } else {
+                               hc->xfer_buff += len;
+                               hc->xfer_len -= len;
+                       }
+
+                       qtd->n_desc++;
+                       n_desc++;
+               }
+               while ((hc->xfer_len > 0) && (n_desc != MAX_DMA_DESC_NUM_GENERIC));
+
+
+               qtd->in_process = 1;
+
+               if (qh->ep_type == UE_CONTROL)
+                       break;
+
+               if (n_desc == MAX_DMA_DESC_NUM_GENERIC)
+                       break;
+       }
+
+       if (n_desc) {
+               /* Request Transfer Complete interrupt for the last descriptor */
+               qh->desc_list[n_desc - 1].status.b.ioc = 1;
+               /* End of List indicator */
+               qh->desc_list[n_desc - 1].status.b.eol = 1;
+
+               hc->ntd = n_desc;
+       }
+}
+
+/**
+ * For Control and Bulk endpoints initializes descriptor list
+ * and starts the transfer.
+ *
+ * For Interrupt and Isochronous endpoints initializes descriptor list
+ * then updates FrameList, marking appropriate entries as active.
+ * In case of Isochronous, the starting descriptor index is calculated based
+ * on the scheduled frame, but only on the first transfer descriptor within a session.
+ * Then starts the transfer via enabling the channel.
+ * For Isochronous endpoint the channel is not halted on XferComplete
+ * interrupt so remains assigned to the endpoint(QH) until session is done.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh The QH to init.
+ *
+ * @return 0 if successful, negative error code otherwise.
+ */
+void dwc_otg_hcd_start_xfer_ddma(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       /* Channel is already assigned */
+       dwc_hc_t *hc = qh->channel;
+       uint8_t skip_frames = 0;
+
+       switch (hc->ep_type) {
+       case DWC_OTG_EP_TYPE_CONTROL:
+       case DWC_OTG_EP_TYPE_BULK:
+               init_non_isoc_dma_desc(hcd, qh);
+
+               dwc_otg_hc_start_transfer_ddma(hcd->core_if, hc);
+               break;
+       case DWC_OTG_EP_TYPE_INTR:
+               init_non_isoc_dma_desc(hcd, qh);
+
+               update_frame_list(hcd, qh, 1);
+
+               dwc_otg_hc_start_transfer_ddma(hcd->core_if, hc);
+               break;
+       case DWC_OTG_EP_TYPE_ISOC:
+
+               if (!qh->ntd)
+                       skip_frames = recalc_initial_desc_idx(hcd, qh);
+
+               init_isoc_dma_desc(hcd, qh, skip_frames);
+
+               if (!hc->xfer_started) {
+
+                       update_frame_list(hcd, qh, 1);
+
+                       /*
+                        * Always set to max, instead of actual size.
+                        * Otherwise ntd will be changed with
+                        * channel being enabled. Not recommended.
+                        *
+                        */
+                       hc->ntd = max_desc_num(qh);
+                       /* Enable channel only once for ISOC */
+                       dwc_otg_hc_start_transfer_ddma(hcd->core_if, hc);
+               }
+
+               break;
+       default:
+
+               break;
+       }
+}
+
+static void complete_isoc_xfer_ddma(dwc_otg_hcd_t * hcd,
+                                   dwc_hc_t * hc,
+                                   dwc_otg_hc_regs_t * hc_regs,
+                                   dwc_otg_halt_status_e halt_status)
+{
+       struct dwc_otg_hcd_iso_packet_desc *frame_desc;
+       dwc_otg_qtd_t *qtd, *qtd_tmp;
+       dwc_otg_qh_t *qh;
+       dwc_otg_host_dma_desc_t *dma_desc;
+       uint16_t idx, remain;
+       uint8_t urb_compl;
+
+       qh = hc->qh;
+       idx = qh->td_first;
+
+       if (hc->halt_status == DWC_OTG_HC_XFER_URB_DEQUEUE) {
+               DWC_CIRCLEQ_FOREACH_SAFE(qtd, qtd_tmp, &hc->qh->qtd_list, qtd_list_entry)
+                   qtd->in_process = 0;
+               return;
+       } else if ((halt_status == DWC_OTG_HC_XFER_AHB_ERR) ||
+                  (halt_status == DWC_OTG_HC_XFER_BABBLE_ERR)) {
+               /*
+                * Channel is halted in these error cases.
+                * Considered as serious issues.
+                * Complete all URBs marking all frames as failed,
+                * irrespective whether some of the descriptors(frames) succeeded or no.
+                * Pass error code to completion routine as well, to
+                * update urb->status, some of class drivers might use it to stop
+                * queing transfer requests.
+                */
+               int err = (halt_status == DWC_OTG_HC_XFER_AHB_ERR)
+                   ? (-DWC_E_IO)
+                   : (-DWC_E_OVERFLOW);
+
+               DWC_CIRCLEQ_FOREACH_SAFE(qtd, qtd_tmp, &hc->qh->qtd_list, qtd_list_entry) {
+                       for (idx = 0; idx < qtd->urb->packet_count; idx++) {
+                               frame_desc = &qtd->urb->iso_descs[idx];
+                               frame_desc->status = err;
+                       }
+                       hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, err);
+                       dwc_otg_hcd_qtd_remove_and_free(hcd, qtd, qh);
+               }
+               return;
+       }
+
+       DWC_CIRCLEQ_FOREACH_SAFE(qtd, qtd_tmp, &hc->qh->qtd_list, qtd_list_entry) {
+
+               if (!qtd->in_process)
+                       break;
+
+               urb_compl = 0;
+
+               do {
+
+                       dma_desc = &qh->desc_list[idx];
+
+                       frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index];
+                       remain = hc->ep_is_in ? dma_desc->status.b_isoc.n_bytes : 0;
+
+                       if (dma_desc->status.b_isoc.sts == DMA_DESC_STS_PKTERR) {
+                               /*
+                                * XactError or, unable to complete all the transactions
+                                * in the scheduled micro-frame/frame,
+                                * both indicated by DMA_DESC_STS_PKTERR.
+                                */
+                               qtd->urb->error_count++;
+                               frame_desc->actual_length = qh->n_bytes[idx] - remain;
+                               frame_desc->status = -DWC_E_PROTOCOL;
+                       } else {
+                               /* Success */
+
+                               frame_desc->actual_length = qh->n_bytes[idx] - remain;
+                               frame_desc->status = 0;
+                       }
+
+                       if (++qtd->isoc_frame_index == qtd->urb->packet_count) {
+                               /*
+                                * urb->status is not used for isoc transfers here.
+                                * The individual frame_desc status are used instead.
+                                */
+
+                               hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, 0);
+                               dwc_otg_hcd_qtd_remove_and_free(hcd, qtd, qh);
+
+                               /*
+                                * This check is necessary because urb_dequeue can be called
+                                * from urb complete callback(sound driver example).
+                                * All pending URBs are dequeued there, so no need for
+                                * further processing.
+                                */
+                               if (hc->halt_status == DWC_OTG_HC_XFER_URB_DEQUEUE) {
+                                       return;
+                               }
+
+                               urb_compl = 1;
+
+                       }
+
+                       qh->ntd--;
+
+                       /* Stop if IOC requested descriptor reached */
+                       if (dma_desc->status.b_isoc.ioc) {
+                               idx = desclist_idx_inc(idx, qh->interval, hc->speed);
+                               goto stop_scan;
+                       }
+
+                       idx = desclist_idx_inc(idx, qh->interval, hc->speed);
+
+                       if (urb_compl)
+                               break;
+               }
+               while (idx != qh->td_first);
+       }
+stop_scan:
+       qh->td_first = idx;
+}
+
+uint8_t update_non_isoc_urb_state_ddma(dwc_otg_hcd_t * hcd,
+                                      dwc_hc_t * hc,
+                                      dwc_otg_qtd_t * qtd,
+                                      dwc_otg_host_dma_desc_t * dma_desc,
+                                      dwc_otg_halt_status_e halt_status,
+                                      uint32_t n_bytes, uint8_t * xfer_done)
+{
+
+       uint16_t remain = hc->ep_is_in ? dma_desc->status.b.n_bytes : 0;
+       dwc_otg_hcd_urb_t *urb = qtd->urb;
+
+       if (halt_status == DWC_OTG_HC_XFER_AHB_ERR) {
+               urb->status = -DWC_E_IO;
+               return 1;
+       }
+       if (dma_desc->status.b.sts == DMA_DESC_STS_PKTERR) {
+               switch (halt_status) {
+               case DWC_OTG_HC_XFER_STALL:
+                       urb->status = -DWC_E_PIPE;
+                       break;
+               case DWC_OTG_HC_XFER_BABBLE_ERR:
+                       urb->status = -DWC_E_OVERFLOW;
+                       break;
+               case DWC_OTG_HC_XFER_XACT_ERR:
+                       urb->status = -DWC_E_PROTOCOL;
+                       break;
+               default:
+                       DWC_ERROR("%s: Unhandled descriptor error status (%d)\n", __func__,
+                                 halt_status);
+                       break;
+               }
+               return 1;
+       }
+
+       if (dma_desc->status.b.a == 1) {
+               DWC_DEBUGPL(DBG_HCDV,
+                           "Active descriptor encountered on channel %d\n",
+                           hc->hc_num);
+               return 0;
+       }
+
+       if (hc->ep_type == DWC_OTG_EP_TYPE_CONTROL) {
+               if (qtd->control_phase == DWC_OTG_CONTROL_DATA) {
+                       urb->actual_length += n_bytes - remain;
+                       if (remain || urb->actual_length == urb->length) {
+                               /*
+                                * For Control Data stage do not set urb->status=0 to prevent
+                                * URB callback. Set it when Status phase done. See below.
+                                */
+                               *xfer_done = 1;
+                       }
+
+               } else if (qtd->control_phase == DWC_OTG_CONTROL_STATUS) {
+                       urb->status = 0;
+                       *xfer_done = 1;
+               }
+               /* No handling for SETUP stage */
+       } else {
+               /* BULK and INTR */
+               urb->actual_length += n_bytes - remain;
+               if (remain || urb->actual_length == urb->length) {
+                       urb->status = 0;
+                       *xfer_done = 1;
+               }
+       }
+
+       return 0;
+}
+
+static void complete_non_isoc_xfer_ddma(dwc_otg_hcd_t * hcd,
+                                       dwc_hc_t * hc,
+                                       dwc_otg_hc_regs_t * hc_regs,
+                                       dwc_otg_halt_status_e halt_status)
+{
+       dwc_otg_hcd_urb_t *urb = NULL;
+       dwc_otg_qtd_t *qtd, *qtd_tmp;
+       dwc_otg_qh_t *qh;
+       dwc_otg_host_dma_desc_t *dma_desc;
+       uint32_t n_bytes, n_desc, i;
+       uint8_t failed = 0, xfer_done;
+
+       n_desc = 0;
+
+       qh = hc->qh;
+
+       if (hc->halt_status == DWC_OTG_HC_XFER_URB_DEQUEUE) {
+               DWC_CIRCLEQ_FOREACH_SAFE(qtd, qtd_tmp, &hc->qh->qtd_list, qtd_list_entry) {
+                       qtd->in_process = 0;
+               }
+               return;
+       }
+
+       DWC_CIRCLEQ_FOREACH_SAFE(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry) {
+
+               urb = qtd->urb;
+
+               n_bytes = 0;
+               xfer_done = 0;
+
+               for (i = 0; i < qtd->n_desc; i++) {
+                       dma_desc = &qh->desc_list[n_desc];
+
+                       n_bytes = qh->n_bytes[n_desc];
+
+                       failed =
+                           update_non_isoc_urb_state_ddma(hcd, hc, qtd,
+                                                          dma_desc,
+                                                          halt_status, n_bytes,
+                                                          &xfer_done);
+
+                       if (failed
+                           || (xfer_done
+                               && (urb->status != -DWC_E_IN_PROGRESS))) {
+
+                               hcd->fops->complete(hcd, urb->priv, urb,
+                                                   urb->status);
+                               dwc_otg_hcd_qtd_remove_and_free(hcd, qtd, qh);
+
+                               if (failed)
+                                       goto stop_scan;
+                       } else if (qh->ep_type == UE_CONTROL) {
+                               if (qtd->control_phase == DWC_OTG_CONTROL_SETUP) {
+                                       if (urb->length > 0) {
+                                               qtd->control_phase = DWC_OTG_CONTROL_DATA;
+                                       } else {
+                                               qtd->control_phase = DWC_OTG_CONTROL_STATUS;
+                                       }
+                                       DWC_DEBUGPL(DBG_HCDV, "  Control setup transaction done\n");
+                               } else if (qtd->control_phase == DWC_OTG_CONTROL_DATA) {
+                                       if (xfer_done) {
+                                               qtd->control_phase = DWC_OTG_CONTROL_STATUS;
+                                               DWC_DEBUGPL(DBG_HCDV, "  Control data transfer done\n");
+                                       } else if (i + 1 == qtd->n_desc) {
+                                               /*
+                                                * Last descriptor for Control data stage which is
+                                                * not completed yet.
+                                                */
+                                               dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+                                       }
+                               }
+                       }
+
+                       n_desc++;
+               }
+
+       }
+
+stop_scan:
+
+       if (qh->ep_type != UE_CONTROL) {
+               /*
+                * Resetting the data toggle for bulk
+                * and interrupt endpoints in case of stall. See handle_hc_stall_intr()
+                */
+               if (halt_status == DWC_OTG_HC_XFER_STALL)
+                       qh->data_toggle = DWC_OTG_HC_PID_DATA0;
+               else
+                       dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+       }
+
+       if (halt_status == DWC_OTG_HC_XFER_COMPLETE) {
+               hcint_data_t hcint;
+               hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+               if (hcint.b.nyet) {
+                       /*
+                        * Got a NYET on the last transaction of the transfer. It
+                        * means that the endpoint should be in the PING state at the
+                        * beginning of the next transfer.
+                        */
+                       qh->ping_state = 1;
+                       clear_hc_int(hc_regs, nyet);
+               }
+
+       }
+
+}
+
+/**
+ * This function is called from interrupt handlers.
+ * Scans the descriptor list, updates URB's status and
+ * calls completion routine for the URB if it's done.
+ * Releases the channel to be used by other transfers.
+ * In case of Isochronous endpoint the channel is not halted until
+ * the end of the session, i.e. QTD list is empty.
+ * If periodic channel released the FrameList is updated accordingly.
+ *
+ * Calls transaction selection routines to activate pending transfers.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param hc Host channel, the transfer is completed on.
+ * @param hc_regs Host channel registers.
+ * @param halt_status Reason the channel is being halted,
+ *                   or just XferComplete for isochronous transfer
+ */
+void dwc_otg_hcd_complete_xfer_ddma(dwc_otg_hcd_t * hcd,
+                                   dwc_hc_t * hc,
+                                   dwc_otg_hc_regs_t * hc_regs,
+                                   dwc_otg_halt_status_e halt_status)
+{
+       uint8_t continue_isoc_xfer = 0;
+       dwc_otg_transaction_type_e tr_type;
+       dwc_otg_qh_t *qh = hc->qh;
+
+       if (hc->ep_type == DWC_OTG_EP_TYPE_ISOC) {
+
+               complete_isoc_xfer_ddma(hcd, hc, hc_regs, halt_status);
+
+               /* Release the channel if halted or session completed */
+               if (halt_status != DWC_OTG_HC_XFER_COMPLETE ||
+                   DWC_CIRCLEQ_EMPTY(&qh->qtd_list)) {
+
+                       /* Halt the channel if session completed */
+                       if (halt_status == DWC_OTG_HC_XFER_COMPLETE) {
+                               dwc_otg_hc_halt(hcd->core_if, hc, halt_status);
+                       }
+
+                       release_channel_ddma(hcd, qh);
+                       dwc_otg_hcd_qh_remove(hcd, qh);
+               } else {
+                       /* Keep in assigned schedule to continue transfer */
+                       DWC_LIST_MOVE_HEAD(&hcd->periodic_sched_assigned,
+                                          &qh->qh_list_entry);
+                       continue_isoc_xfer = 1;
+
+               }
+               /** @todo Consider the case when period exceeds FrameList size.
+                *  Frame Rollover interrupt should be used.
+                */
+       } else {
+               /* Scan descriptor list to complete the URB(s), then release the channel */
+               complete_non_isoc_xfer_ddma(hcd, hc, hc_regs, halt_status);
+
+               release_channel_ddma(hcd, qh);
+               dwc_otg_hcd_qh_remove(hcd, qh);
+
+               if (!DWC_CIRCLEQ_EMPTY(&qh->qtd_list)) {
+                       /* Add back to inactive non-periodic schedule on normal completion */
+                       dwc_otg_hcd_qh_add(hcd, qh);
+               }
+
+       }
+       tr_type = dwc_otg_hcd_select_transactions(hcd);
+       if (tr_type != DWC_OTG_TRANSACTION_NONE || continue_isoc_xfer) {
+               if (continue_isoc_xfer) {
+                       if (tr_type == DWC_OTG_TRANSACTION_NONE) {
+                               tr_type = DWC_OTG_TRANSACTION_PERIODIC;
+                       } else if (tr_type == DWC_OTG_TRANSACTION_NON_PERIODIC) {
+                               tr_type = DWC_OTG_TRANSACTION_ALL;
+                       }
+               }
+               dwc_otg_hcd_queue_transactions(hcd, tr_type);
+       }
+}
+
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_if.h
@@ -0,0 +1,421 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_if.h $
+ * $Revision: #12 $
+ * $Date: 2011/10/26 $
+ * $Change: 1873028 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_DEVICE_ONLY
+#ifndef __DWC_HCD_IF_H__
+#define __DWC_HCD_IF_H__
+
+#include "dwc_otg_core_if.h"
+
+/** @file
+ * This file defines DWC_OTG HCD Core API.
+ */
+
+struct dwc_otg_hcd;
+typedef struct dwc_otg_hcd dwc_otg_hcd_t;
+
+struct dwc_otg_hcd_urb;
+typedef struct dwc_otg_hcd_urb dwc_otg_hcd_urb_t;
+
+/** @name HCD Function Driver Callbacks */
+/** @{ */
+
+/** This function is called whenever core switches to host mode. */
+typedef int (*dwc_otg_hcd_start_cb_t) (dwc_otg_hcd_t * hcd);
+
+/** This function is called when device has been disconnected */
+typedef int (*dwc_otg_hcd_disconnect_cb_t) (dwc_otg_hcd_t * hcd);
+
+/** Wrapper provides this function to HCD to core, so it can get hub information to which device is connected */
+typedef int (*dwc_otg_hcd_hub_info_from_urb_cb_t) (dwc_otg_hcd_t * hcd,
+                                                  void *urb_handle,
+                                                  uint32_t * hub_addr,
+                                                  uint32_t * port_addr);
+/** Via this function HCD core gets device speed */
+typedef int (*dwc_otg_hcd_speed_from_urb_cb_t) (dwc_otg_hcd_t * hcd,
+                                               void *urb_handle);
+
+/** This function is called when urb is completed */
+typedef int (*dwc_otg_hcd_complete_urb_cb_t) (dwc_otg_hcd_t * hcd,
+                                             void *urb_handle,
+                                             dwc_otg_hcd_urb_t * dwc_otg_urb,
+                                             int32_t status);
+
+/** Via this function HCD core gets b_hnp_enable parameter */
+typedef int (*dwc_otg_hcd_get_b_hnp_enable) (dwc_otg_hcd_t * hcd);
+
+struct dwc_otg_hcd_function_ops {
+       dwc_otg_hcd_start_cb_t start;
+       dwc_otg_hcd_disconnect_cb_t disconnect;
+       dwc_otg_hcd_hub_info_from_urb_cb_t hub_info;
+       dwc_otg_hcd_speed_from_urb_cb_t speed;
+       dwc_otg_hcd_complete_urb_cb_t complete;
+       dwc_otg_hcd_get_b_hnp_enable get_b_hnp_enable;
+};
+/** @} */
+
+/** @name HCD Core API */
+/** @{ */
+/** This function allocates dwc_otg_hcd structure and returns pointer on it. */
+extern dwc_otg_hcd_t *dwc_otg_hcd_alloc_hcd(void);
+
+/** This function should be called to initiate HCD Core.
+ *
+ * @param hcd The HCD
+ * @param core_if The DWC_OTG Core
+ *
+ * Returns -DWC_E_NO_MEMORY if no enough memory.
+ * Returns 0 on success
+ */
+extern int dwc_otg_hcd_init(dwc_otg_hcd_t * hcd, dwc_otg_core_if_t * core_if);
+
+/** Frees HCD
+ *
+ * @param hcd The HCD
+ */
+extern void dwc_otg_hcd_remove(dwc_otg_hcd_t * hcd);
+
+/** This function should be called on every hardware interrupt.
+ *
+ * @param dwc_otg_hcd The HCD
+ *
+ * Returns non zero if interrupt is handled
+ * Return 0 if interrupt is not handled
+ */
+extern int32_t dwc_otg_hcd_handle_intr(dwc_otg_hcd_t * dwc_otg_hcd);
+
+/** This function is used to handle the fast interrupt
+ *
+ */
+#ifdef CONFIG_ARM64
+extern void dwc_otg_hcd_handle_fiq(void);
+#else
+extern void __attribute__ ((naked)) dwc_otg_hcd_handle_fiq(void);
+#endif
+
+/**
+ * Returns private data set by
+ * dwc_otg_hcd_set_priv_data function.
+ *
+ * @param hcd The HCD
+ */
+extern void *dwc_otg_hcd_get_priv_data(dwc_otg_hcd_t * hcd);
+
+/**
+ * Set private data.
+ *
+ * @param hcd The HCD
+ * @param priv_data pointer to be stored in private data
+ */
+extern void dwc_otg_hcd_set_priv_data(dwc_otg_hcd_t * hcd, void *priv_data);
+
+/**
+ * This function initializes the HCD Core.
+ *
+ * @param hcd The HCD
+ * @param fops The Function Driver Operations data structure containing pointers to all callbacks.
+ *
+ * Returns -DWC_E_NO_DEVICE if Core is currently is in device mode.
+ * Returns 0 on success
+ */
+extern int dwc_otg_hcd_start(dwc_otg_hcd_t * hcd,
+                            struct dwc_otg_hcd_function_ops *fops);
+
+/**
+ * Halts the DWC_otg host mode operations in a clean manner. USB transfers are
+ * stopped.
+ *
+ * @param hcd The HCD
+ */
+extern void dwc_otg_hcd_stop(dwc_otg_hcd_t * hcd);
+
+/**
+ * Handles hub class-specific requests.
+ *
+ * @param dwc_otg_hcd The HCD
+ * @param typeReq Request Type
+ * @param wValue wValue from control request
+ * @param wIndex wIndex from control request
+ * @param buf data buffer
+ * @param wLength data buffer length
+ *
+ * Returns -DWC_E_INVALID if invalid argument is passed
+ * Returns 0 on success
+ */
+extern int dwc_otg_hcd_hub_control(dwc_otg_hcd_t * dwc_otg_hcd,
+                                  uint16_t typeReq, uint16_t wValue,
+                                  uint16_t wIndex, uint8_t * buf,
+                                  uint16_t wLength);
+
+/**
+ * Returns otg port number.
+ *
+ * @param hcd The HCD
+ */
+extern uint32_t dwc_otg_hcd_otg_port(dwc_otg_hcd_t * hcd);
+
+/**
+ * Returns OTG version - either 1.3 or 2.0.
+ *
+ * @param core_if The core_if structure pointer
+ */
+extern uint16_t dwc_otg_get_otg_version(dwc_otg_core_if_t * core_if);
+
+/**
+ * Returns 1 if currently core is acting as B host, and 0 otherwise.
+ *
+ * @param hcd The HCD
+ */
+extern uint32_t dwc_otg_hcd_is_b_host(dwc_otg_hcd_t * hcd);
+
+/**
+ * Returns current frame number.
+ *
+ * @param hcd The HCD
+ */
+extern int dwc_otg_hcd_get_frame_number(dwc_otg_hcd_t * hcd);
+
+/**
+ * Dumps hcd state.
+ *
+ * @param hcd The HCD
+ */
+extern void dwc_otg_hcd_dump_state(dwc_otg_hcd_t * hcd);
+
+/**
+ * Dump the average frame remaining at SOF. This can be used to
+ * determine average interrupt latency. Frame remaining is also shown for
+ * start transfer and two additional sample points.
+ * Currently this function is not implemented.
+ *
+ * @param hcd The HCD
+ */
+extern void dwc_otg_hcd_dump_frrem(dwc_otg_hcd_t * hcd);
+
+/**
+ * Sends LPM transaction to the local device.
+ *
+ * @param hcd The HCD
+ * @param devaddr Device Address
+ * @param hird Host initiated resume duration
+ * @param bRemoteWake Value of bRemoteWake field in LPM transaction
+ *
+ * Returns negative value if sending LPM transaction was not succeeded.
+ * Returns 0 on success.
+ */
+extern int dwc_otg_hcd_send_lpm(dwc_otg_hcd_t * hcd, uint8_t devaddr,
+                               uint8_t hird, uint8_t bRemoteWake);
+
+/* URB interface */
+
+/**
+ * Allocates memory for dwc_otg_hcd_urb structure.
+ * Allocated memory should be freed by call of DWC_FREE.
+ *
+ * @param hcd The HCD
+ * @param iso_desc_count Count of ISOC descriptors
+ * @param atomic_alloc Specefies whether to perform atomic allocation.
+ */
+extern dwc_otg_hcd_urb_t *dwc_otg_hcd_urb_alloc(dwc_otg_hcd_t * hcd,
+                                               int iso_desc_count,
+                                               int atomic_alloc);
+
+/**
+ * Set pipe information in URB.
+ *
+ * @param hcd_urb DWC_OTG URB
+ * @param devaddr Device Address
+ * @param ep_num Endpoint Number
+ * @param ep_type Endpoint Type
+ * @param ep_dir Endpoint Direction
+ * @param mps Max Packet Size
+ */
+extern void dwc_otg_hcd_urb_set_pipeinfo(dwc_otg_hcd_urb_t * hcd_urb,
+                                        uint8_t devaddr, uint8_t ep_num,
+                                        uint8_t ep_type, uint8_t ep_dir,
+                                        uint16_t mps);
+
+/* Transfer flags */
+#define URB_GIVEBACK_ASAP 0x1
+#define URB_SEND_ZERO_PACKET 0x2
+
+/**
+ * Sets dwc_otg_hcd_urb parameters.
+ *
+ * @param urb DWC_OTG URB allocated by dwc_otg_hcd_urb_alloc function.
+ * @param urb_handle Unique handle for request, this will be passed back
+ * to function driver in completion callback.
+ * @param buf The buffer for the data
+ * @param dma The DMA buffer for the data
+ * @param buflen Transfer length
+ * @param sp Buffer for setup data
+ * @param sp_dma DMA address of setup data buffer
+ * @param flags Transfer flags
+ * @param interval Polling interval for interrupt or isochronous transfers.
+ */
+extern void dwc_otg_hcd_urb_set_params(dwc_otg_hcd_urb_t * urb,
+                                      void *urb_handle, void *buf,
+                                      dwc_dma_t dma, uint32_t buflen, void *sp,
+                                      dwc_dma_t sp_dma, uint32_t flags,
+                                      uint16_t interval);
+
+/** Gets status from dwc_otg_hcd_urb
+ *
+ * @param dwc_otg_urb DWC_OTG URB
+ */
+extern uint32_t dwc_otg_hcd_urb_get_status(dwc_otg_hcd_urb_t * dwc_otg_urb);
+
+/** Gets actual length from dwc_otg_hcd_urb
+ *
+ * @param dwc_otg_urb DWC_OTG URB
+ */
+extern uint32_t dwc_otg_hcd_urb_get_actual_length(dwc_otg_hcd_urb_t *
+                                                 dwc_otg_urb);
+
+/** Gets error count from dwc_otg_hcd_urb. Only for ISOC URBs
+ *
+ * @param dwc_otg_urb DWC_OTG URB
+ */
+extern uint32_t dwc_otg_hcd_urb_get_error_count(dwc_otg_hcd_urb_t *
+                                               dwc_otg_urb);
+
+/** Set ISOC descriptor offset and length
+ *
+ * @param dwc_otg_urb DWC_OTG URB
+ * @param desc_num ISOC descriptor number
+ * @param offset Offset from beginig of buffer.
+ * @param length Transaction length
+ */
+extern void dwc_otg_hcd_urb_set_iso_desc_params(dwc_otg_hcd_urb_t * dwc_otg_urb,
+                                               int desc_num, uint32_t offset,
+                                               uint32_t length);
+
+/** Get status of ISOC descriptor, specified by desc_num
+ *
+ * @param dwc_otg_urb DWC_OTG URB
+ * @param desc_num ISOC descriptor number
+ */
+extern uint32_t dwc_otg_hcd_urb_get_iso_desc_status(dwc_otg_hcd_urb_t *
+                                                   dwc_otg_urb, int desc_num);
+
+/** Get actual length of ISOC descriptor, specified by desc_num
+ *
+ * @param dwc_otg_urb DWC_OTG URB
+ * @param desc_num ISOC descriptor number
+ */
+extern uint32_t dwc_otg_hcd_urb_get_iso_desc_actual_length(dwc_otg_hcd_urb_t *
+                                                          dwc_otg_urb,
+                                                          int desc_num);
+
+/** Queue URB. After transfer is completes, the complete callback will be called with the URB status
+ *
+ * @param dwc_otg_hcd The HCD
+ * @param dwc_otg_urb DWC_OTG URB
+ * @param ep_handle Out parameter for returning endpoint handle
+ * @param atomic_alloc Flag to do atomic allocation if needed
+ *
+ * Returns -DWC_E_NO_DEVICE if no device is connected.
+ * Returns -DWC_E_NO_MEMORY if there is no enough memory.
+ * Returns 0 on success.
+ */
+extern int dwc_otg_hcd_urb_enqueue(dwc_otg_hcd_t * dwc_otg_hcd,
+                                  dwc_otg_hcd_urb_t * dwc_otg_urb,
+                                  void **ep_handle, int atomic_alloc);
+
+/** De-queue the specified URB
+ *
+ * @param dwc_otg_hcd The HCD
+ * @param dwc_otg_urb DWC_OTG URB
+ */
+extern int dwc_otg_hcd_urb_dequeue(dwc_otg_hcd_t * dwc_otg_hcd,
+                                  dwc_otg_hcd_urb_t * dwc_otg_urb);
+
+/** Frees resources in the DWC_otg controller related to a given endpoint.
+ * Any URBs for the endpoint must already be dequeued.
+ *
+ * @param hcd The HCD
+ * @param ep_handle Endpoint handle, returned by dwc_otg_hcd_urb_enqueue function
+ * @param retry Number of retries if there are queued transfers.
+ *
+ * Returns -DWC_E_INVALID if invalid arguments are passed.
+ * Returns 0 on success
+ */
+extern int dwc_otg_hcd_endpoint_disable(dwc_otg_hcd_t * hcd, void *ep_handle,
+                                       int retry);
+
+/* Resets the data toggle in qh structure. This function can be called from
+ * usb_clear_halt routine.
+ *
+ * @param hcd The HCD
+ * @param ep_handle Endpoint handle, returned by dwc_otg_hcd_urb_enqueue function
+ *
+ * Returns -DWC_E_INVALID if invalid arguments are passed.
+ * Returns 0 on success
+ */
+extern int dwc_otg_hcd_endpoint_reset(dwc_otg_hcd_t * hcd, void *ep_handle);
+
+/** Returns 1 if status of specified port is changed and 0 otherwise.
+ *
+ * @param hcd The HCD
+ * @param port Port number
+ */
+extern int dwc_otg_hcd_is_status_changed(dwc_otg_hcd_t * hcd, int port);
+
+/** Call this function to check if bandwidth was allocated for specified endpoint.
+ * Only for ISOC and INTERRUPT endpoints.
+ *
+ * @param hcd The HCD
+ * @param ep_handle Endpoint handle
+ */
+extern int dwc_otg_hcd_is_bandwidth_allocated(dwc_otg_hcd_t * hcd,
+                                             void *ep_handle);
+
+/** Call this function to check if bandwidth was freed for specified endpoint.
+ *
+ * @param hcd The HCD
+ * @param ep_handle Endpoint handle
+ */
+extern int dwc_otg_hcd_is_bandwidth_freed(dwc_otg_hcd_t * hcd, void *ep_handle);
+
+/** Returns bandwidth allocated for specified endpoint in microseconds.
+ * Only for ISOC and INTERRUPT endpoints.
+ *
+ * @param hcd The HCD
+ * @param ep_handle Endpoint handle
+ */
+extern uint8_t dwc_otg_hcd_get_ep_bandwidth(dwc_otg_hcd_t * hcd,
+                                           void *ep_handle);
+
+/** @} */
+
+#endif /* __DWC_HCD_IF_H__ */
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
@@ -0,0 +1,2757 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_intr.c $
+ * $Revision: #89 $
+ * $Date: 2011/10/20 $
+ * $Change: 1869487 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_DEVICE_ONLY
+
+#include "dwc_otg_hcd.h"
+#include "dwc_otg_regs.h"
+
+#include <linux/jiffies.h>
+#ifdef CONFIG_ARM
+#include <asm/fiq.h>
+#endif
+
+extern bool microframe_schedule;
+
+/** @file
+ * This file contains the implementation of the HCD Interrupt handlers.
+ */
+
+int fiq_done, int_done;
+
+#ifdef FIQ_DEBUG
+char buffer[1000*16];
+int wptr;
+void notrace _fiq_print(FIQDBG_T dbg_lvl, char *fmt, ...)
+{
+       FIQDBG_T dbg_lvl_req = FIQDBG_PORTHUB;
+       va_list args;
+       char text[17];
+       hfnum_data_t hfnum = { .d32 = FIQ_READ(dwc_regs_base + 0x408) };
+
+       if(dbg_lvl & dbg_lvl_req || dbg_lvl == FIQDBG_ERR)
+       {
+               local_fiq_disable();
+               snprintf(text, 9, "%4d%d:%d ", hfnum.b.frnum/8, hfnum.b.frnum%8, 8 - hfnum.b.frrem/937);
+               va_start(args, fmt);
+               vsnprintf(text+8, 9, fmt, args);
+               va_end(args);
+
+               memcpy(buffer + wptr, text, 16);
+               wptr = (wptr + 16) % sizeof(buffer);
+               local_fiq_enable();
+       }
+}
+#endif
+
+/** This function handles interrupts for the HCD. */
+int32_t dwc_otg_hcd_handle_intr(dwc_otg_hcd_t * dwc_otg_hcd)
+{
+       int retval = 0;
+       static int last_time;
+       dwc_otg_core_if_t *core_if = dwc_otg_hcd->core_if;
+       gintsts_data_t gintsts;
+       gintmsk_data_t gintmsk;
+       hfnum_data_t hfnum;
+       haintmsk_data_t haintmsk;
+
+#ifdef DEBUG
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+
+#endif
+
+       gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+       gintmsk.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk);
+
+       /* Exit from ISR if core is hibernated */
+       if (core_if->hibernation_suspend == 1) {
+               goto exit_handler_routine;
+       }
+       DWC_SPINLOCK(dwc_otg_hcd->lock);
+       /* Check if HOST Mode */
+       if (dwc_otg_is_host_mode(core_if)) {
+               if (fiq_enable) {
+                       local_fiq_disable();
+                       fiq_fsm_spin_lock(&dwc_otg_hcd->fiq_state->lock);
+                       /* Pull in from the FIQ's disabled mask */
+                       gintmsk.d32 = gintmsk.d32 | ~(dwc_otg_hcd->fiq_state->gintmsk_saved.d32);
+                       dwc_otg_hcd->fiq_state->gintmsk_saved.d32 = ~0;
+               }
+
+               if (fiq_fsm_enable && ( 0x0000FFFF & ~(dwc_otg_hcd->fiq_state->haintmsk_saved.b2.chint))) {
+                       gintsts.b.hcintr = 1;
+               }
+
+               /* Danger will robinson: fake a SOF if necessary */
+               if (fiq_fsm_enable && (dwc_otg_hcd->fiq_state->gintmsk_saved.b.sofintr == 1)) {
+                       gintsts.b.sofintr = 1;
+               }
+               gintsts.d32 &= gintmsk.d32;
+
+               if (fiq_enable) {
+                       fiq_fsm_spin_unlock(&dwc_otg_hcd->fiq_state->lock);
+                       local_fiq_enable();
+               }
+
+               if (!gintsts.d32) {
+                       goto exit_handler_routine;
+               }
+
+#ifdef DEBUG
+               // We should be OK doing this because the common interrupts should already have been serviced
+               /* Don't print debug message in the interrupt handler on SOF */
+#ifndef DEBUG_SOF
+               if (gintsts.d32 != DWC_SOF_INTR_MASK)
+#endif
+                       DWC_DEBUGPL(DBG_HCDI, "\n");
+#endif
+
+#ifdef DEBUG
+#ifndef DEBUG_SOF
+               if (gintsts.d32 != DWC_SOF_INTR_MASK)
+#endif
+                       DWC_DEBUGPL(DBG_HCDI,
+                                   "DWC OTG HCD Interrupt Detected gintsts&gintmsk=0x%08x core_if=%p\n",
+                                   gintsts.d32, core_if);
+#endif
+               hfnum.d32 = DWC_READ_REG32(&dwc_otg_hcd->core_if->host_if->host_global_regs->hfnum);
+               if (gintsts.b.sofintr) {
+                       retval |= dwc_otg_hcd_handle_sof_intr(dwc_otg_hcd);
+               }
+
+               if (gintsts.b.rxstsqlvl) {
+                       retval |=
+                           dwc_otg_hcd_handle_rx_status_q_level_intr
+                           (dwc_otg_hcd);
+               }
+               if (gintsts.b.nptxfempty) {
+                       retval |=
+                           dwc_otg_hcd_handle_np_tx_fifo_empty_intr
+                           (dwc_otg_hcd);
+               }
+               if (gintsts.b.i2cintr) {
+                       /** @todo Implement i2cintr handler. */
+               }
+               if (gintsts.b.portintr) {
+
+                       gintmsk_data_t gintmsk = { .b.portintr = 1};
+                       retval |= dwc_otg_hcd_handle_port_intr(dwc_otg_hcd);
+                       if (fiq_enable) {
+                               local_fiq_disable();
+                               fiq_fsm_spin_lock(&dwc_otg_hcd->fiq_state->lock);
+                               DWC_MODIFY_REG32(&dwc_otg_hcd->core_if->core_global_regs->gintmsk, 0, gintmsk.d32);
+                               fiq_fsm_spin_unlock(&dwc_otg_hcd->fiq_state->lock);
+                               local_fiq_enable();
+                       } else {
+                               DWC_MODIFY_REG32(&dwc_otg_hcd->core_if->core_global_regs->gintmsk, 0, gintmsk.d32);
+                       }
+               }
+               if (gintsts.b.hcintr) {
+                       retval |= dwc_otg_hcd_handle_hc_intr(dwc_otg_hcd);
+               }
+               if (gintsts.b.ptxfempty) {
+                       retval |=
+                           dwc_otg_hcd_handle_perio_tx_fifo_empty_intr
+                           (dwc_otg_hcd);
+               }
+#ifdef DEBUG
+#ifndef DEBUG_SOF
+               if (gintsts.d32 != DWC_SOF_INTR_MASK)
+#endif
+               {
+                       DWC_DEBUGPL(DBG_HCDI,
+                                   "DWC OTG HCD Finished Servicing Interrupts\n");
+                       DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD gintsts=0x%08x\n",
+                                   DWC_READ_REG32(&global_regs->gintsts));
+                       DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD gintmsk=0x%08x\n",
+                                   DWC_READ_REG32(&global_regs->gintmsk));
+               }
+#endif
+
+#ifdef DEBUG
+#ifndef DEBUG_SOF
+               if (gintsts.d32 != DWC_SOF_INTR_MASK)
+#endif
+                       DWC_DEBUGPL(DBG_HCDI, "\n");
+#endif
+
+       }
+
+exit_handler_routine:
+       if (fiq_enable) {
+               gintmsk_data_t gintmsk_new;
+               haintmsk_data_t haintmsk_new;
+               local_fiq_disable();
+               fiq_fsm_spin_lock(&dwc_otg_hcd->fiq_state->lock);
+               gintmsk_new.d32 = *(volatile uint32_t *)&dwc_otg_hcd->fiq_state->gintmsk_saved.d32;
+               if(fiq_fsm_enable)
+                       haintmsk_new.d32 = *(volatile uint32_t *)&dwc_otg_hcd->fiq_state->haintmsk_saved.d32;
+               else
+                       haintmsk_new.d32 = 0x0000FFFF;
+
+               /* The FIQ could have sneaked another interrupt in. If so, don't clear MPHI */
+               if ((gintmsk_new.d32 == ~0) && (haintmsk_new.d32 == 0x0000FFFF)) {
+                       if (dwc_otg_hcd->fiq_state->mphi_regs.swirq_clr) {
+                               DWC_WRITE_REG32(dwc_otg_hcd->fiq_state->mphi_regs.swirq_clr, 1);
+                       } else {
+                               DWC_WRITE_REG32(dwc_otg_hcd->fiq_state->mphi_regs.intstat, (1<<16));
+                       }
+                       if (dwc_otg_hcd->fiq_state->mphi_int_count >= 50) {
+                               fiq_print(FIQDBG_INT, dwc_otg_hcd->fiq_state, "MPHI CLR");
+                                       DWC_WRITE_REG32(dwc_otg_hcd->fiq_state->mphi_regs.ctrl, ((1<<31) + (1<<16)));
+                                       while (!(DWC_READ_REG32(dwc_otg_hcd->fiq_state->mphi_regs.ctrl) & (1 << 17)))
+                                               ;
+                                       DWC_WRITE_REG32(dwc_otg_hcd->fiq_state->mphi_regs.ctrl, (1<<31));
+                                       dwc_otg_hcd->fiq_state->mphi_int_count = 0;
+                       }
+                       int_done++;
+               }
+               haintmsk.d32 = DWC_READ_REG32(&core_if->host_if->host_global_regs->haintmsk);
+               /* Re-enable interrupts that the FIQ masked (first time round) */
+               FIQ_WRITE(dwc_otg_hcd->fiq_state->dwc_regs_base + GINTMSK, gintmsk.d32);
+               fiq_fsm_spin_unlock(&dwc_otg_hcd->fiq_state->lock);
+               local_fiq_enable();
+
+               if ((jiffies / HZ) > last_time) {
+                       //dwc_otg_qh_t *qh;
+                       //dwc_list_link_t *cur;
+                       /* Once a second output the fiq and irq numbers, useful for debug */
+                       last_time = jiffies / HZ;
+               //       DWC_WARN("np_kick=%d AHC=%d sched_frame=%d cur_frame=%d int_done=%d fiq_done=%d",
+               //      dwc_otg_hcd->fiq_state->kick_np_queues, dwc_otg_hcd->available_host_channels,
+               //      dwc_otg_hcd->fiq_state->next_sched_frame, hfnum.b.frnum, int_done, dwc_otg_hcd->fiq_state->fiq_done);
+                        //printk(KERN_WARNING "Periodic queues:\n");
+               }
+       }
+
+       DWC_SPINUNLOCK(dwc_otg_hcd->lock);
+       return retval;
+}
+
+#ifdef DWC_TRACK_MISSED_SOFS
+
+#warning Compiling code to track missed SOFs
+#define FRAME_NUM_ARRAY_SIZE 1000
+/**
+ * This function is for debug only.
+ */
+static inline void track_missed_sofs(uint16_t curr_frame_number)
+{
+       static uint16_t frame_num_array[FRAME_NUM_ARRAY_SIZE];
+       static uint16_t last_frame_num_array[FRAME_NUM_ARRAY_SIZE];
+       static int frame_num_idx = 0;
+       static uint16_t last_frame_num = DWC_HFNUM_MAX_FRNUM;
+       static int dumped_frame_num_array = 0;
+
+       if (frame_num_idx < FRAME_NUM_ARRAY_SIZE) {
+               if (((last_frame_num + 1) & DWC_HFNUM_MAX_FRNUM) !=
+                   curr_frame_number) {
+                       frame_num_array[frame_num_idx] = curr_frame_number;
+                       last_frame_num_array[frame_num_idx++] = last_frame_num;
+               }
+       } else if (!dumped_frame_num_array) {
+               int i;
+               DWC_PRINTF("Frame     Last Frame\n");
+               DWC_PRINTF("-----     ----------\n");
+               for (i = 0; i < FRAME_NUM_ARRAY_SIZE; i++) {
+                       DWC_PRINTF("0x%04x    0x%04x\n",
+                                  frame_num_array[i], last_frame_num_array[i]);
+               }
+               dumped_frame_num_array = 1;
+       }
+       last_frame_num = curr_frame_number;
+}
+#endif
+
+/**
+ * Handles the start-of-frame interrupt in host mode. Non-periodic
+ * transactions may be queued to the DWC_otg controller for the current
+ * (micro)frame. Periodic transactions may be queued to the controller for the
+ * next (micro)frame.
+ */
+int32_t dwc_otg_hcd_handle_sof_intr(dwc_otg_hcd_t * hcd)
+{
+       hfnum_data_t hfnum;
+       gintsts_data_t gintsts = { .d32 = 0 };
+       dwc_list_link_t *qh_entry;
+       dwc_otg_qh_t *qh;
+       dwc_otg_transaction_type_e tr_type;
+       int did_something = 0;
+       int32_t next_sched_frame = -1;
+
+       hfnum.d32 =
+           DWC_READ_REG32(&hcd->core_if->host_if->host_global_regs->hfnum);
+
+#ifdef DEBUG_SOF
+       DWC_DEBUGPL(DBG_HCD, "--Start of Frame Interrupt--\n");
+#endif
+       hcd->frame_number = hfnum.b.frnum;
+
+#ifdef DEBUG
+       hcd->frrem_accum += hfnum.b.frrem;
+       hcd->frrem_samples++;
+#endif
+
+#ifdef DWC_TRACK_MISSED_SOFS
+       track_missed_sofs(hcd->frame_number);
+#endif
+       /* Determine whether any periodic QHs should be executed. */
+       qh_entry = DWC_LIST_FIRST(&hcd->periodic_sched_inactive);
+       while (qh_entry != &hcd->periodic_sched_inactive) {
+               qh = DWC_LIST_ENTRY(qh_entry, dwc_otg_qh_t, qh_list_entry);
+               qh_entry = qh_entry->next;
+               if (dwc_frame_num_le(qh->sched_frame, hcd->frame_number)) {
+
+                       /*
+                        * Move QH to the ready list to be executed next
+                        * (micro)frame.
+                        */
+                       DWC_LIST_MOVE_HEAD(&hcd->periodic_sched_ready,
+                                          &qh->qh_list_entry);
+
+                       did_something = 1;
+               }
+               else
+               {
+                       if(next_sched_frame < 0 || dwc_frame_num_le(qh->sched_frame, next_sched_frame))
+                       {
+                               next_sched_frame = qh->sched_frame;
+                       }
+               }
+       }
+       if (fiq_enable)
+               hcd->fiq_state->next_sched_frame = next_sched_frame;
+
+       tr_type = dwc_otg_hcd_select_transactions(hcd);
+       if (tr_type != DWC_OTG_TRANSACTION_NONE) {
+               dwc_otg_hcd_queue_transactions(hcd, tr_type);
+               did_something = 1;
+       }
+
+       /* Clear interrupt - but do not trample on the FIQ sof */
+       if (!fiq_fsm_enable) {
+               gintsts.b.sofintr = 1;
+               DWC_WRITE_REG32(&hcd->core_if->core_global_regs->gintsts, gintsts.d32);
+       }
+       return 1;
+}
+
+/** Handles the Rx Status Queue Level Interrupt, which indicates that there is at
+ * least one packet in the Rx FIFO.  The packets are moved from the FIFO to
+ * memory if the DWC_otg controller is operating in Slave mode. */
+int32_t dwc_otg_hcd_handle_rx_status_q_level_intr(dwc_otg_hcd_t * dwc_otg_hcd)
+{
+       host_grxsts_data_t grxsts;
+       dwc_hc_t *hc = NULL;
+
+       DWC_DEBUGPL(DBG_HCD, "--RxStsQ Level Interrupt--\n");
+
+       grxsts.d32 =
+           DWC_READ_REG32(&dwc_otg_hcd->core_if->core_global_regs->grxstsp);
+
+       hc = dwc_otg_hcd->hc_ptr_array[grxsts.b.chnum];
+       if (!hc) {
+               DWC_ERROR("Unable to get corresponding channel\n");
+               return 0;
+       }
+
+       /* Packet Status */
+       DWC_DEBUGPL(DBG_HCDV, "    Ch num = %d\n", grxsts.b.chnum);
+       DWC_DEBUGPL(DBG_HCDV, "    Count = %d\n", grxsts.b.bcnt);
+       DWC_DEBUGPL(DBG_HCDV, "    DPID = %d, hc.dpid = %d\n", grxsts.b.dpid,
+                   hc->data_pid_start);
+       DWC_DEBUGPL(DBG_HCDV, "    PStatus = %d\n", grxsts.b.pktsts);
+
+       switch (grxsts.b.pktsts) {
+       case DWC_GRXSTS_PKTSTS_IN:
+               /* Read the data into the host buffer. */
+               if (grxsts.b.bcnt > 0) {
+                       dwc_otg_read_packet(dwc_otg_hcd->core_if,
+                                           hc->xfer_buff, grxsts.b.bcnt);
+
+                       /* Update the HC fields for the next packet received. */
+                       hc->xfer_count += grxsts.b.bcnt;
+                       hc->xfer_buff += grxsts.b.bcnt;
+               }
+
+       case DWC_GRXSTS_PKTSTS_IN_XFER_COMP:
+       case DWC_GRXSTS_PKTSTS_DATA_TOGGLE_ERR:
+       case DWC_GRXSTS_PKTSTS_CH_HALTED:
+               /* Handled in interrupt, just ignore data */
+               break;
+       default:
+               DWC_ERROR("RX_STS_Q Interrupt: Unknown status %d\n",
+                         grxsts.b.pktsts);
+               break;
+       }
+
+       return 1;
+}
+
+/** This interrupt occurs when the non-periodic Tx FIFO is half-empty. More
+ * data packets may be written to the FIFO for OUT transfers. More requests
+ * may be written to the non-periodic request queue for IN transfers. This
+ * interrupt is enabled only in Slave mode. */
+int32_t dwc_otg_hcd_handle_np_tx_fifo_empty_intr(dwc_otg_hcd_t * dwc_otg_hcd)
+{
+       DWC_DEBUGPL(DBG_HCD, "--Non-Periodic TxFIFO Empty Interrupt--\n");
+       dwc_otg_hcd_queue_transactions(dwc_otg_hcd,
+                                      DWC_OTG_TRANSACTION_NON_PERIODIC);
+       return 1;
+}
+
+/** This interrupt occurs when the periodic Tx FIFO is half-empty. More data
+ * packets may be written to the FIFO for OUT transfers. More requests may be
+ * written to the periodic request queue for IN transfers. This interrupt is
+ * enabled only in Slave mode. */
+int32_t dwc_otg_hcd_handle_perio_tx_fifo_empty_intr(dwc_otg_hcd_t * dwc_otg_hcd)
+{
+       DWC_DEBUGPL(DBG_HCD, "--Periodic TxFIFO Empty Interrupt--\n");
+       dwc_otg_hcd_queue_transactions(dwc_otg_hcd,
+                                      DWC_OTG_TRANSACTION_PERIODIC);
+       return 1;
+}
+
+/** There are multiple conditions that can cause a port interrupt. This function
+ * determines which interrupt conditions have occurred and handles them
+ * appropriately. */
+int32_t dwc_otg_hcd_handle_port_intr(dwc_otg_hcd_t * dwc_otg_hcd)
+{
+       int retval = 0;
+       hprt0_data_t hprt0;
+       hprt0_data_t hprt0_modify;
+
+       hprt0.d32 = DWC_READ_REG32(dwc_otg_hcd->core_if->host_if->hprt0);
+       hprt0_modify.d32 = DWC_READ_REG32(dwc_otg_hcd->core_if->host_if->hprt0);
+
+       /* Clear appropriate bits in HPRT0 to clear the interrupt bit in
+        * GINTSTS */
+
+       hprt0_modify.b.prtena = 0;
+       hprt0_modify.b.prtconndet = 0;
+       hprt0_modify.b.prtenchng = 0;
+       hprt0_modify.b.prtovrcurrchng = 0;
+
+       /* Port Connect Detected
+        * Set flag and clear if detected */
+       if (dwc_otg_hcd->core_if->hibernation_suspend == 1) {
+               // Dont modify port status if we are in hibernation state
+               hprt0_modify.b.prtconndet = 1;
+               hprt0_modify.b.prtenchng = 1;
+               DWC_WRITE_REG32(dwc_otg_hcd->core_if->host_if->hprt0, hprt0_modify.d32);
+               hprt0.d32 = DWC_READ_REG32(dwc_otg_hcd->core_if->host_if->hprt0);
+               return retval;
+       }
+
+       if (hprt0.b.prtconndet) {
+               /** @todo - check if steps performed in 'else' block should be perfromed regardles adp */
+               if (dwc_otg_hcd->core_if->adp_enable &&
+                               dwc_otg_hcd->core_if->adp.vbuson_timer_started == 1) {
+                       DWC_PRINTF("PORT CONNECT DETECTED ----------------\n");
+                       DWC_TIMER_CANCEL(dwc_otg_hcd->core_if->adp.vbuson_timer);
+                       dwc_otg_hcd->core_if->adp.vbuson_timer_started = 0;
+                       /* TODO - check if this is required, as
+                        * host initialization was already performed
+                        * after initial ADP probing
+                        */
+                       /*dwc_otg_hcd->core_if->adp.vbuson_timer_started = 0;
+                       dwc_otg_core_init(dwc_otg_hcd->core_if);
+                       dwc_otg_enable_global_interrupts(dwc_otg_hcd->core_if);
+                       cil_hcd_start(dwc_otg_hcd->core_if);*/
+               } else {
+
+                       DWC_DEBUGPL(DBG_HCD, "--Port Interrupt HPRT0=0x%08x "
+                                   "Port Connect Detected--\n", hprt0.d32);
+                       dwc_otg_hcd->flags.b.port_connect_status_change = 1;
+                       dwc_otg_hcd->flags.b.port_connect_status = 1;
+                       hprt0_modify.b.prtconndet = 1;
+
+                       /* B-Device has connected, Delete the connection timer. */
+                       DWC_TIMER_CANCEL(dwc_otg_hcd->conn_timer);
+               }
+               /* The Hub driver asserts a reset when it sees port connect
+                * status change flag */
+               retval |= 1;
+       }
+
+       /* Port Enable Changed
+        * Clear if detected - Set internal flag if disabled */
+       if (hprt0.b.prtenchng) {
+               DWC_DEBUGPL(DBG_HCD, "  --Port Interrupt HPRT0=0x%08x "
+                           "Port Enable Changed--\n", hprt0.d32);
+               hprt0_modify.b.prtenchng = 1;
+               if (hprt0.b.prtena == 1) {
+                       hfir_data_t hfir;
+                       int do_reset = 0;
+                       dwc_otg_core_params_t *params =
+                           dwc_otg_hcd->core_if->core_params;
+                       dwc_otg_core_global_regs_t *global_regs =
+                           dwc_otg_hcd->core_if->core_global_regs;
+                       dwc_otg_host_if_t *host_if =
+                           dwc_otg_hcd->core_if->host_if;
+
+                       dwc_otg_hcd->flags.b.port_speed = hprt0.b.prtspd;
+                       if (microframe_schedule)
+                               init_hcd_usecs(dwc_otg_hcd);
+
+                       /* Every time when port enables calculate
+                        * HFIR.FrInterval
+                        */
+                       hfir.d32 = DWC_READ_REG32(&host_if->host_global_regs->hfir);
+                       hfir.b.frint = calc_frame_interval(dwc_otg_hcd->core_if);
+                       DWC_WRITE_REG32(&host_if->host_global_regs->hfir, hfir.d32);
+
+                       /* Check if we need to adjust the PHY clock speed for
+                        * low power and adjust it */
+                       if (params->host_support_fs_ls_low_power) {
+                               gusbcfg_data_t usbcfg;
+
+                               usbcfg.d32 =
+                                   DWC_READ_REG32(&global_regs->gusbcfg);
+
+                               if (hprt0.b.prtspd == DWC_HPRT0_PRTSPD_LOW_SPEED
+                                   || hprt0.b.prtspd ==
+                                   DWC_HPRT0_PRTSPD_FULL_SPEED) {
+                                       /*
+                                        * Low power
+                                        */
+                                       hcfg_data_t hcfg;
+                                       if (usbcfg.b.phylpwrclksel == 0) {
+                                               /* Set PHY low power clock select for FS/LS devices */
+                                               usbcfg.b.phylpwrclksel = 1;
+                                               DWC_WRITE_REG32
+                                                   (&global_regs->gusbcfg,
+                                                    usbcfg.d32);
+                                               do_reset = 1;
+                                       }
+
+                                       hcfg.d32 =
+                                           DWC_READ_REG32
+                                           (&host_if->host_global_regs->hcfg);
+
+                                       if (hprt0.b.prtspd ==
+                                           DWC_HPRT0_PRTSPD_LOW_SPEED
+                                           && params->host_ls_low_power_phy_clk
+                                           ==
+                                           DWC_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ)
+                                       {
+                                               /* 6 MHZ */
+                                               DWC_DEBUGPL(DBG_CIL,
+                                                           "FS_PHY programming HCFG to 6 MHz (Low Power)\n");
+                                               if (hcfg.b.fslspclksel !=
+                                                   DWC_HCFG_6_MHZ) {
+                                                       hcfg.b.fslspclksel =
+                                                           DWC_HCFG_6_MHZ;
+                                                       DWC_WRITE_REG32
+                                                           (&host_if->host_global_regs->hcfg,
+                                                            hcfg.d32);
+                                                       do_reset = 1;
+                                               }
+                                       } else {
+                                               /* 48 MHZ */
+                                               DWC_DEBUGPL(DBG_CIL,
+                                                           "FS_PHY programming HCFG to 48 MHz ()\n");
+                                               if (hcfg.b.fslspclksel !=
+                                                   DWC_HCFG_48_MHZ) {
+                                                       hcfg.b.fslspclksel =
+                                                           DWC_HCFG_48_MHZ;
+                                                       DWC_WRITE_REG32
+                                                           (&host_if->host_global_regs->hcfg,
+                                                            hcfg.d32);
+                                                       do_reset = 1;
+                                               }
+                                       }
+                               } else {
+                                       /*
+                                        * Not low power
+                                        */
+                                       if (usbcfg.b.phylpwrclksel == 1) {
+                                               usbcfg.b.phylpwrclksel = 0;
+                                               DWC_WRITE_REG32
+                                                   (&global_regs->gusbcfg,
+                                                    usbcfg.d32);
+                                               do_reset = 1;
+                                       }
+                               }
+
+                               if (do_reset) {
+                                       DWC_TASK_SCHEDULE(dwc_otg_hcd->reset_tasklet);
+                               }
+                       }
+
+                       if (!do_reset) {
+                               /* Port has been enabled set the reset change flag */
+                               dwc_otg_hcd->flags.b.port_reset_change = 1;
+                       }
+               } else {
+                       dwc_otg_hcd->flags.b.port_enable_change = 1;
+               }
+               retval |= 1;
+       }
+
+       /** Overcurrent Change Interrupt */
+       if (hprt0.b.prtovrcurrchng) {
+               DWC_DEBUGPL(DBG_HCD, "  --Port Interrupt HPRT0=0x%08x "
+                           "Port Overcurrent Changed--\n", hprt0.d32);
+               dwc_otg_hcd->flags.b.port_over_current_change = 1;
+               hprt0_modify.b.prtovrcurrchng = 1;
+               retval |= 1;
+       }
+
+       /* Clear Port Interrupts */
+       DWC_WRITE_REG32(dwc_otg_hcd->core_if->host_if->hprt0, hprt0_modify.d32);
+
+       return retval;
+}
+
+/** This interrupt indicates that one or more host channels has a pending
+ * interrupt. There are multiple conditions that can cause each host channel
+ * interrupt. This function determines which conditions have occurred for each
+ * host channel interrupt and handles them appropriately. */
+int32_t dwc_otg_hcd_handle_hc_intr(dwc_otg_hcd_t * dwc_otg_hcd)
+{
+       int i;
+       int retval = 0;
+       haint_data_t haint = { .d32 = 0 } ;
+
+       /* Clear appropriate bits in HCINTn to clear the interrupt bit in
+        * GINTSTS */
+
+       if (!fiq_fsm_enable)
+               haint.d32 = dwc_otg_read_host_all_channels_intr(dwc_otg_hcd->core_if);
+
+       // Overwrite with saved interrupts from fiq handler
+       if(fiq_fsm_enable)
+       {
+               /* check the mask? */
+               local_fiq_disable();
+               fiq_fsm_spin_lock(&dwc_otg_hcd->fiq_state->lock);
+               haint.b2.chint |= ~(dwc_otg_hcd->fiq_state->haintmsk_saved.b2.chint);
+               dwc_otg_hcd->fiq_state->haintmsk_saved.b2.chint = ~0;
+               fiq_fsm_spin_unlock(&dwc_otg_hcd->fiq_state->lock);
+               local_fiq_enable();
+       }
+
+       for (i = 0; i < dwc_otg_hcd->core_if->core_params->host_channels; i++) {
+               if (haint.b2.chint & (1 << i)) {
+                       retval |= dwc_otg_hcd_handle_hc_n_intr(dwc_otg_hcd, i);
+               }
+       }
+
+       return retval;
+}
+
+/**
+ * Gets the actual length of a transfer after the transfer halts. _halt_status
+ * holds the reason for the halt.
+ *
+ * For IN transfers where halt_status is DWC_OTG_HC_XFER_COMPLETE,
+ * *short_read is set to 1 upon return if less than the requested
+ * number of bytes were transferred. Otherwise, *short_read is set to 0 upon
+ * return. short_read may also be NULL on entry, in which case it remains
+ * unchanged.
+ */
+static uint32_t get_actual_xfer_length(dwc_hc_t * hc,
+                                      dwc_otg_hc_regs_t * hc_regs,
+                                      dwc_otg_qtd_t * qtd,
+                                      dwc_otg_halt_status_e halt_status,
+                                      int *short_read)
+{
+       hctsiz_data_t hctsiz;
+       uint32_t length;
+
+       if (short_read != NULL) {
+               *short_read = 0;
+       }
+       hctsiz.d32 = DWC_READ_REG32(&hc_regs->hctsiz);
+
+       if (halt_status == DWC_OTG_HC_XFER_COMPLETE) {
+               if (hc->ep_is_in) {
+                       length = hc->xfer_len - hctsiz.b.xfersize;
+                       if (short_read != NULL) {
+                               *short_read = (hctsiz.b.xfersize != 0);
+                       }
+               } else if (hc->qh->do_split) {
+                               //length = split_out_xfersize[hc->hc_num];
+                               length = qtd->ssplit_out_xfer_count;
+               } else {
+                       length = hc->xfer_len;
+               }
+       } else {
+               /*
+                * Must use the hctsiz.pktcnt field to determine how much data
+                * has been transferred. This field reflects the number of
+                * packets that have been transferred via the USB. This is
+                * always an integral number of packets if the transfer was
+                * halted before its normal completion. (Can't use the
+                * hctsiz.xfersize field because that reflects the number of
+                * bytes transferred via the AHB, not the USB).
+                */
+               length =
+                   (hc->start_pkt_count - hctsiz.b.pktcnt) * hc->max_packet;
+       }
+
+       return length;
+}
+
+/**
+ * Updates the state of the URB after a Transfer Complete interrupt on the
+ * host channel. Updates the actual_length field of the URB based on the
+ * number of bytes transferred via the host channel. Sets the URB status
+ * if the data transfer is finished.
+ *
+ * @return 1 if the data transfer specified by the URB is completely finished,
+ * 0 otherwise.
+ */
+static int update_urb_state_xfer_comp(dwc_hc_t * hc,
+                                     dwc_otg_hc_regs_t * hc_regs,
+                                     dwc_otg_hcd_urb_t * urb,
+                                     dwc_otg_qtd_t * qtd)
+{
+       int xfer_done = 0;
+       int short_read = 0;
+
+       int xfer_length;
+
+       xfer_length = get_actual_xfer_length(hc, hc_regs, qtd,
+                                            DWC_OTG_HC_XFER_COMPLETE,
+                                            &short_read);
+
+       if (urb->actual_length + xfer_length > urb->length) {
+               printk_once(KERN_DEBUG "dwc_otg: DEVICE:%03d : %s:%d:trimming xfer length\n",
+                       hc->dev_addr, __func__, __LINE__);
+               xfer_length = urb->length - urb->actual_length;
+       }
+
+       /* non DWORD-aligned buffer case handling. */
+       if (hc->align_buff && xfer_length && hc->ep_is_in) {
+               dwc_memcpy(urb->buf + urb->actual_length, hc->qh->dw_align_buf,
+                          xfer_length);
+       }
+
+       urb->actual_length += xfer_length;
+
+       if (xfer_length && (hc->ep_type == DWC_OTG_EP_TYPE_BULK) &&
+           (urb->flags & URB_SEND_ZERO_PACKET)
+           && (urb->actual_length == urb->length)
+           && !(urb->length % hc->max_packet)) {
+               xfer_done = 0;
+       } else if (short_read || urb->actual_length >= urb->length) {
+               xfer_done = 1;
+               urb->status = 0;
+       }
+
+#ifdef DEBUG
+       {
+               hctsiz_data_t hctsiz;
+               hctsiz.d32 = DWC_READ_REG32(&hc_regs->hctsiz);
+               DWC_DEBUGPL(DBG_HCDV, "DWC_otg: %s: %s, channel %d\n",
+                           __func__, (hc->ep_is_in ? "IN" : "OUT"),
+                           hc->hc_num);
+               DWC_DEBUGPL(DBG_HCDV, "  hc->xfer_len %d\n", hc->xfer_len);
+               DWC_DEBUGPL(DBG_HCDV, "  hctsiz.xfersize %d\n",
+                           hctsiz.b.xfersize);
+               DWC_DEBUGPL(DBG_HCDV, "  urb->transfer_buffer_length %d\n",
+                           urb->length);
+               DWC_DEBUGPL(DBG_HCDV, "  urb->actual_length %d\n",
+                           urb->actual_length);
+               DWC_DEBUGPL(DBG_HCDV, "  short_read %d, xfer_done %d\n",
+                           short_read, xfer_done);
+       }
+#endif
+
+       return xfer_done;
+}
+
+/*
+ * Save the starting data toggle for the next transfer. The data toggle is
+ * saved in the QH for non-control transfers and it's saved in the QTD for
+ * control transfers.
+ */
+void dwc_otg_hcd_save_data_toggle(dwc_hc_t * hc,
+                            dwc_otg_hc_regs_t * hc_regs, dwc_otg_qtd_t * qtd)
+{
+       hctsiz_data_t hctsiz;
+       hctsiz.d32 = DWC_READ_REG32(&hc_regs->hctsiz);
+
+       if (hc->ep_type != DWC_OTG_EP_TYPE_CONTROL) {
+               dwc_otg_qh_t *qh = hc->qh;
+               if (hctsiz.b.pid == DWC_HCTSIZ_DATA0) {
+                       qh->data_toggle = DWC_OTG_HC_PID_DATA0;
+               } else {
+                       qh->data_toggle = DWC_OTG_HC_PID_DATA1;
+               }
+       } else {
+               if (hctsiz.b.pid == DWC_HCTSIZ_DATA0) {
+                       qtd->data_toggle = DWC_OTG_HC_PID_DATA0;
+               } else {
+                       qtd->data_toggle = DWC_OTG_HC_PID_DATA1;
+               }
+       }
+}
+
+/**
+ * Updates the state of an Isochronous URB when the transfer is stopped for
+ * any reason. The fields of the current entry in the frame descriptor array
+ * are set based on the transfer state and the input _halt_status. Completes
+ * the Isochronous URB if all the URB frames have been completed.
+ *
+ * @return DWC_OTG_HC_XFER_COMPLETE if there are more frames remaining to be
+ * transferred in the URB. Otherwise return DWC_OTG_HC_XFER_URB_COMPLETE.
+ */
+static dwc_otg_halt_status_e
+update_isoc_urb_state(dwc_otg_hcd_t * hcd,
+                     dwc_hc_t * hc,
+                     dwc_otg_hc_regs_t * hc_regs,
+                     dwc_otg_qtd_t * qtd, dwc_otg_halt_status_e halt_status)
+{
+       dwc_otg_hcd_urb_t *urb = qtd->urb;
+       dwc_otg_halt_status_e ret_val = halt_status;
+       struct dwc_otg_hcd_iso_packet_desc *frame_desc;
+
+       frame_desc = &urb->iso_descs[qtd->isoc_frame_index];
+       switch (halt_status) {
+       case DWC_OTG_HC_XFER_COMPLETE:
+               frame_desc->status = 0;
+               frame_desc->actual_length =
+                   get_actual_xfer_length(hc, hc_regs, qtd, halt_status, NULL);
+
+               /* non DWORD-aligned buffer case handling. */
+               if (hc->align_buff && frame_desc->actual_length && hc->ep_is_in) {
+                       dwc_memcpy(urb->buf + frame_desc->offset + qtd->isoc_split_offset,
+                                  hc->qh->dw_align_buf, frame_desc->actual_length);
+               }
+
+               break;
+       case DWC_OTG_HC_XFER_FRAME_OVERRUN:
+               urb->error_count++;
+               if (hc->ep_is_in) {
+                       frame_desc->status = -DWC_E_NO_STREAM_RES;
+               } else {
+                       frame_desc->status = -DWC_E_COMMUNICATION;
+               }
+               frame_desc->actual_length = 0;
+               break;
+       case DWC_OTG_HC_XFER_BABBLE_ERR:
+               urb->error_count++;
+               frame_desc->status = -DWC_E_OVERFLOW;
+               /* Don't need to update actual_length in this case. */
+               break;
+       case DWC_OTG_HC_XFER_XACT_ERR:
+               urb->error_count++;
+               frame_desc->status = -DWC_E_PROTOCOL;
+               frame_desc->actual_length =
+                   get_actual_xfer_length(hc, hc_regs, qtd, halt_status, NULL);
+
+               /* non DWORD-aligned buffer case handling. */
+               if (hc->align_buff && frame_desc->actual_length && hc->ep_is_in) {
+                       dwc_memcpy(urb->buf + frame_desc->offset + qtd->isoc_split_offset,
+                                  hc->qh->dw_align_buf, frame_desc->actual_length);
+               }
+               /* Skip whole frame */
+               if (hc->qh->do_split && (hc->ep_type == DWC_OTG_EP_TYPE_ISOC) &&
+                   hc->ep_is_in && hcd->core_if->dma_enable) {
+                       qtd->complete_split = 0;
+                       qtd->isoc_split_offset = 0;
+               }
+
+               break;
+       default:
+               DWC_ASSERT(1, "Unhandled _halt_status (%d)\n", halt_status);
+               break;
+       }
+       if (++qtd->isoc_frame_index == urb->packet_count) {
+               /*
+                * urb->status is not used for isoc transfers.
+                * The individual frame_desc statuses are used instead.
+                */
+               hcd->fops->complete(hcd, urb->priv, urb, 0);
+               ret_val = DWC_OTG_HC_XFER_URB_COMPLETE;
+       } else {
+               ret_val = DWC_OTG_HC_XFER_COMPLETE;
+       }
+       return ret_val;
+}
+
+/**
+ * Frees the first QTD in the QH's list if free_qtd is 1. For non-periodic
+ * QHs, removes the QH from the active non-periodic schedule. If any QTDs are
+ * still linked to the QH, the QH is added to the end of the inactive
+ * non-periodic schedule. For periodic QHs, removes the QH from the periodic
+ * schedule if no more QTDs are linked to the QH.
+ */
+static void deactivate_qh(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh, int free_qtd)
+{
+       int continue_split = 0;
+       dwc_otg_qtd_t *qtd;
+
+       DWC_DEBUGPL(DBG_HCDV, "  %s(%p,%p,%d)\n", __func__, hcd, qh, free_qtd);
+
+       qtd = DWC_CIRCLEQ_FIRST(&qh->qtd_list);
+
+       if (qtd->complete_split) {
+               continue_split = 1;
+       } else if (qtd->isoc_split_pos == DWC_HCSPLIT_XACTPOS_MID ||
+                  qtd->isoc_split_pos == DWC_HCSPLIT_XACTPOS_END) {
+               continue_split = 1;
+       }
+
+       if (free_qtd) {
+               dwc_otg_hcd_qtd_remove_and_free(hcd, qtd, qh);
+               continue_split = 0;
+       }
+
+       qh->channel = NULL;
+       dwc_otg_hcd_qh_deactivate(hcd, qh, continue_split);
+}
+
+/**
+ * Releases a host channel for use by other transfers. Attempts to select and
+ * queue more transactions since at least one host channel is available.
+ *
+ * @param hcd The HCD state structure.
+ * @param hc The host channel to release.
+ * @param qtd The QTD associated with the host channel. This QTD may be freed
+ * if the transfer is complete or an error has occurred.
+ * @param halt_status Reason the channel is being released. This status
+ * determines the actions taken by this function.
+ */
+static void release_channel(dwc_otg_hcd_t * hcd,
+                           dwc_hc_t * hc,
+                           dwc_otg_qtd_t * qtd,
+                           dwc_otg_halt_status_e halt_status)
+{
+       dwc_otg_transaction_type_e tr_type;
+       int free_qtd;
+
+       int hog_port = 0;
+
+       DWC_DEBUGPL(DBG_HCDV, "  %s: channel %d, halt_status %d, xfer_len %d\n",
+                   __func__, hc->hc_num, halt_status, hc->xfer_len);
+
+       if(fiq_fsm_enable && hc->do_split) {
+               if(!hc->ep_is_in && hc->ep_type == UE_ISOCHRONOUS) {
+                       if(hc->xact_pos == DWC_HCSPLIT_XACTPOS_MID ||
+                                       hc->xact_pos == DWC_HCSPLIT_XACTPOS_BEGIN) {
+                               hog_port = 0;
+                       }
+               }
+       }
+
+       switch (halt_status) {
+       case DWC_OTG_HC_XFER_URB_COMPLETE:
+               free_qtd = 1;
+               break;
+       case DWC_OTG_HC_XFER_AHB_ERR:
+       case DWC_OTG_HC_XFER_STALL:
+       case DWC_OTG_HC_XFER_BABBLE_ERR:
+               free_qtd = 1;
+               break;
+       case DWC_OTG_HC_XFER_XACT_ERR:
+               if (qtd->error_count >= 3) {
+                       DWC_DEBUGPL(DBG_HCDV,
+                                   "  Complete URB with transaction error\n");
+                       free_qtd = 1;
+                       qtd->urb->status = -DWC_E_PROTOCOL;
+                       hcd->fops->complete(hcd, qtd->urb->priv,
+                                           qtd->urb, -DWC_E_PROTOCOL);
+               } else {
+                       free_qtd = 0;
+               }
+               break;
+       case DWC_OTG_HC_XFER_URB_DEQUEUE:
+               /*
+                * The QTD has already been removed and the QH has been
+                * deactivated. Don't want to do anything except release the
+                * host channel and try to queue more transfers.
+                */
+               goto cleanup;
+       case DWC_OTG_HC_XFER_NO_HALT_STATUS:
+               free_qtd = 0;
+               break;
+       case DWC_OTG_HC_XFER_PERIODIC_INCOMPLETE:
+               DWC_DEBUGPL(DBG_HCDV,
+                       "  Complete URB with I/O error\n");
+               free_qtd = 1;
+               qtd->urb->status = -DWC_E_IO;
+               hcd->fops->complete(hcd, qtd->urb->priv,
+                       qtd->urb, -DWC_E_IO);
+               break;
+       default:
+               free_qtd = 0;
+               break;
+       }
+
+       deactivate_qh(hcd, hc->qh, free_qtd);
+
+cleanup:
+       /*
+        * Release the host channel for use by other transfers. The cleanup
+        * function clears the channel interrupt enables and conditions, so
+        * there's no need to clear the Channel Halted interrupt separately.
+        */
+       if (fiq_fsm_enable && hcd->fiq_state->channel[hc->hc_num].fsm != FIQ_PASSTHROUGH)
+               dwc_otg_cleanup_fiq_channel(hcd, hc->hc_num);
+       dwc_otg_hc_cleanup(hcd->core_if, hc);
+       DWC_CIRCLEQ_INSERT_TAIL(&hcd->free_hc_list, hc, hc_list_entry);
+
+       if (!microframe_schedule) {
+               switch (hc->ep_type) {
+               case DWC_OTG_EP_TYPE_CONTROL:
+               case DWC_OTG_EP_TYPE_BULK:
+                       hcd->non_periodic_channels--;
+                       break;
+
+               default:
+                       /*
+                        * Don't release reservations for periodic channels here.
+                        * That's done when a periodic transfer is descheduled (i.e.
+                        * when the QH is removed from the periodic schedule).
+                        */
+                       break;
+               }
+       } else {
+               hcd->available_host_channels++;
+               fiq_print(FIQDBG_INT, hcd->fiq_state, "AHC = %d ", hcd->available_host_channels);
+       }
+
+       /* Try to queue more transfers now that there's a free channel. */
+       tr_type = dwc_otg_hcd_select_transactions(hcd);
+       if (tr_type != DWC_OTG_TRANSACTION_NONE) {
+               dwc_otg_hcd_queue_transactions(hcd, tr_type);
+       }
+}
+
+/**
+ * Halts a host channel. If the channel cannot be halted immediately because
+ * the request queue is full, this function ensures that the FIFO empty
+ * interrupt for the appropriate queue is enabled so that the halt request can
+ * be queued when there is space in the request queue.
+ *
+ * This function may also be called in DMA mode. In that case, the channel is
+ * simply released since the core always halts the channel automatically in
+ * DMA mode.
+ */
+static void halt_channel(dwc_otg_hcd_t * hcd,
+                        dwc_hc_t * hc,
+                        dwc_otg_qtd_t * qtd, dwc_otg_halt_status_e halt_status)
+{
+       if (hcd->core_if->dma_enable) {
+               release_channel(hcd, hc, qtd, halt_status);
+               return;
+       }
+
+       /* Slave mode processing... */
+       dwc_otg_hc_halt(hcd->core_if, hc, halt_status);
+
+       if (hc->halt_on_queue) {
+               gintmsk_data_t gintmsk = {.d32 = 0 };
+               dwc_otg_core_global_regs_t *global_regs;
+               global_regs = hcd->core_if->core_global_regs;
+
+               if (hc->ep_type == DWC_OTG_EP_TYPE_CONTROL ||
+                   hc->ep_type == DWC_OTG_EP_TYPE_BULK) {
+                       /*
+                        * Make sure the Non-periodic Tx FIFO empty interrupt
+                        * is enabled so that the non-periodic schedule will
+                        * be processed.
+                        */
+                       gintmsk.b.nptxfempty = 1;
+                       if (fiq_enable) {
+                               local_fiq_disable();
+                               fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+                               DWC_MODIFY_REG32(&global_regs->gintmsk, 0, gintmsk.d32);
+                               fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+                               local_fiq_enable();
+                       } else {
+                               DWC_MODIFY_REG32(&global_regs->gintmsk, 0, gintmsk.d32);
+                       }
+               } else {
+                       /*
+                        * Move the QH from the periodic queued schedule to
+                        * the periodic assigned schedule. This allows the
+                        * halt to be queued when the periodic schedule is
+                        * processed.
+                        */
+                       DWC_LIST_MOVE_HEAD(&hcd->periodic_sched_assigned,
+                                          &hc->qh->qh_list_entry);
+
+                       /*
+                        * Make sure the Periodic Tx FIFO Empty interrupt is
+                        * enabled so that the periodic schedule will be
+                        * processed.
+                        */
+                       gintmsk.b.ptxfempty = 1;
+                       if (fiq_enable) {
+                               local_fiq_disable();
+                               fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+                               DWC_MODIFY_REG32(&global_regs->gintmsk, 0, gintmsk.d32);
+                               fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+                               local_fiq_enable();
+                       } else {
+                               DWC_MODIFY_REG32(&global_regs->gintmsk, 0, gintmsk.d32);
+                       }
+               }
+       }
+}
+
+/**
+ * Performs common cleanup for non-periodic transfers after a Transfer
+ * Complete interrupt. This function should be called after any endpoint type
+ * specific handling is finished to release the host channel.
+ */
+static void complete_non_periodic_xfer(dwc_otg_hcd_t * hcd,
+                                      dwc_hc_t * hc,
+                                      dwc_otg_hc_regs_t * hc_regs,
+                                      dwc_otg_qtd_t * qtd,
+                                      dwc_otg_halt_status_e halt_status)
+{
+       hcint_data_t hcint;
+
+       qtd->error_count = 0;
+
+       hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+       if (hcint.b.nyet) {
+               /*
+                * Got a NYET on the last transaction of the transfer. This
+                * means that the endpoint should be in the PING state at the
+                * beginning of the next transfer.
+                */
+               hc->qh->ping_state = 1;
+               clear_hc_int(hc_regs, nyet);
+       }
+
+       /*
+        * Always halt and release the host channel to make it available for
+        * more transfers. There may still be more phases for a control
+        * transfer or more data packets for a bulk transfer at this point,
+        * but the host channel is still halted. A channel will be reassigned
+        * to the transfer when the non-periodic schedule is processed after
+        * the channel is released. This allows transactions to be queued
+        * properly via dwc_otg_hcd_queue_transactions, which also enables the
+        * Tx FIFO Empty interrupt if necessary.
+        */
+       if (hc->ep_is_in) {
+               /*
+                * IN transfers in Slave mode require an explicit disable to
+                * halt the channel. (In DMA mode, this call simply releases
+                * the channel.)
+                */
+               halt_channel(hcd, hc, qtd, halt_status);
+       } else {
+               /*
+                * The channel is automatically disabled by the core for OUT
+                * transfers in Slave mode.
+                */
+               release_channel(hcd, hc, qtd, halt_status);
+       }
+}
+
+/**
+ * Performs common cleanup for periodic transfers after a Transfer Complete
+ * interrupt. This function should be called after any endpoint type specific
+ * handling is finished to release the host channel.
+ */
+static void complete_periodic_xfer(dwc_otg_hcd_t * hcd,
+                                  dwc_hc_t * hc,
+                                  dwc_otg_hc_regs_t * hc_regs,
+                                  dwc_otg_qtd_t * qtd,
+                                  dwc_otg_halt_status_e halt_status)
+{
+       hctsiz_data_t hctsiz;
+       qtd->error_count = 0;
+
+       hctsiz.d32 = DWC_READ_REG32(&hc_regs->hctsiz);
+       if (!hc->ep_is_in || hctsiz.b.pktcnt == 0) {
+               /* Core halts channel in these cases. */
+               release_channel(hcd, hc, qtd, halt_status);
+       } else {
+               /* Flush any outstanding requests from the Tx queue. */
+               halt_channel(hcd, hc, qtd, halt_status);
+       }
+}
+
+static int32_t handle_xfercomp_isoc_split_in(dwc_otg_hcd_t * hcd,
+                                            dwc_hc_t * hc,
+                                            dwc_otg_hc_regs_t * hc_regs,
+                                            dwc_otg_qtd_t * qtd)
+{
+       uint32_t len;
+       struct dwc_otg_hcd_iso_packet_desc *frame_desc;
+       frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index];
+
+       len = get_actual_xfer_length(hc, hc_regs, qtd,
+                                    DWC_OTG_HC_XFER_COMPLETE, NULL);
+
+       if (!len) {
+               qtd->complete_split = 0;
+               qtd->isoc_split_offset = 0;
+               return 0;
+       }
+       frame_desc->actual_length += len;
+
+       if (hc->align_buff && len)
+               dwc_memcpy(qtd->urb->buf + frame_desc->offset +
+                          qtd->isoc_split_offset, hc->qh->dw_align_buf, len);
+       qtd->isoc_split_offset += len;
+
+       if (frame_desc->length == frame_desc->actual_length) {
+               frame_desc->status = 0;
+               qtd->isoc_frame_index++;
+               qtd->complete_split = 0;
+               qtd->isoc_split_offset = 0;
+       }
+
+       if (qtd->isoc_frame_index == qtd->urb->packet_count) {
+               hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, 0);
+               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+       } else {
+               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+       }
+
+       return 1;               /* Indicates that channel released */
+}
+
+/**
+ * Handles a host channel Transfer Complete interrupt. This handler may be
+ * called in either DMA mode or Slave mode.
+ */
+static int32_t handle_hc_xfercomp_intr(dwc_otg_hcd_t * hcd,
+                                      dwc_hc_t * hc,
+                                      dwc_otg_hc_regs_t * hc_regs,
+                                      dwc_otg_qtd_t * qtd)
+{
+       int urb_xfer_done;
+       dwc_otg_halt_status_e halt_status = DWC_OTG_HC_XFER_COMPLETE;
+       dwc_otg_hcd_urb_t *urb = qtd->urb;
+       int pipe_type = dwc_otg_hcd_get_pipe_type(&urb->pipe_info);
+
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+                   "Transfer Complete--\n", hc->hc_num);
+
+       if (hcd->core_if->dma_desc_enable) {
+               dwc_otg_hcd_complete_xfer_ddma(hcd, hc, hc_regs, halt_status);
+               if (pipe_type == UE_ISOCHRONOUS) {
+                       /* Do not disable the interrupt, just clear it */
+                       clear_hc_int(hc_regs, xfercomp);
+                       return 1;
+               }
+               goto handle_xfercomp_done;
+       }
+
+       /*
+        * Handle xfer complete on CSPLIT.
+        */
+
+       if (hc->qh->do_split) {
+               if ((hc->ep_type == DWC_OTG_EP_TYPE_ISOC) && hc->ep_is_in
+                   && hcd->core_if->dma_enable) {
+                       if (qtd->complete_split
+                           && handle_xfercomp_isoc_split_in(hcd, hc, hc_regs,
+                                                            qtd))
+                               goto handle_xfercomp_done;
+               } else {
+                       qtd->complete_split = 0;
+               }
+       }
+
+       /* Update the QTD and URB states. */
+       switch (pipe_type) {
+       case UE_CONTROL:
+               switch (qtd->control_phase) {
+               case DWC_OTG_CONTROL_SETUP:
+                       if (urb->length > 0) {
+                               qtd->control_phase = DWC_OTG_CONTROL_DATA;
+                       } else {
+                               qtd->control_phase = DWC_OTG_CONTROL_STATUS;
+                       }
+                       DWC_DEBUGPL(DBG_HCDV,
+                                   "  Control setup transaction done\n");
+                       halt_status = DWC_OTG_HC_XFER_COMPLETE;
+                       break;
+               case DWC_OTG_CONTROL_DATA:{
+                               urb_xfer_done =
+                                   update_urb_state_xfer_comp(hc, hc_regs, urb,
+                                                              qtd);
+                               if (urb_xfer_done) {
+                                       qtd->control_phase =
+                                           DWC_OTG_CONTROL_STATUS;
+                                       DWC_DEBUGPL(DBG_HCDV,
+                                                   "  Control data transfer done\n");
+                               } else {
+                                       dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+                               }
+                               halt_status = DWC_OTG_HC_XFER_COMPLETE;
+                               break;
+                       }
+               case DWC_OTG_CONTROL_STATUS:
+                       DWC_DEBUGPL(DBG_HCDV, "  Control transfer complete\n");
+                       if (urb->status == -DWC_E_IN_PROGRESS) {
+                               urb->status = 0;
+                       }
+                       hcd->fops->complete(hcd, urb->priv, urb, urb->status);
+                       halt_status = DWC_OTG_HC_XFER_URB_COMPLETE;
+                       break;
+               }
+
+               complete_non_periodic_xfer(hcd, hc, hc_regs, qtd, halt_status);
+               break;
+       case UE_BULK:
+               DWC_DEBUGPL(DBG_HCDV, "  Bulk transfer complete\n");
+               urb_xfer_done =
+                   update_urb_state_xfer_comp(hc, hc_regs, urb, qtd);
+               if (urb_xfer_done) {
+                       hcd->fops->complete(hcd, urb->priv, urb, urb->status);
+                       halt_status = DWC_OTG_HC_XFER_URB_COMPLETE;
+               } else {
+                       halt_status = DWC_OTG_HC_XFER_COMPLETE;
+               }
+
+               dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+               complete_non_periodic_xfer(hcd, hc, hc_regs, qtd, halt_status);
+               break;
+       case UE_INTERRUPT:
+               DWC_DEBUGPL(DBG_HCDV, "  Interrupt transfer complete\n");
+               urb_xfer_done =
+                       update_urb_state_xfer_comp(hc, hc_regs, urb, qtd);
+
+               /*
+                * Interrupt URB is done on the first transfer complete
+                * interrupt.
+                */
+               if (urb_xfer_done) {
+                               hcd->fops->complete(hcd, urb->priv, urb, urb->status);
+                               halt_status = DWC_OTG_HC_XFER_URB_COMPLETE;
+               } else {
+                               halt_status = DWC_OTG_HC_XFER_COMPLETE;
+               }
+
+               dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+               complete_periodic_xfer(hcd, hc, hc_regs, qtd, halt_status);
+               break;
+       case UE_ISOCHRONOUS:
+               DWC_DEBUGPL(DBG_HCDV, "  Isochronous transfer complete\n");
+               if (qtd->isoc_split_pos == DWC_HCSPLIT_XACTPOS_ALL) {
+                       halt_status =
+                           update_isoc_urb_state(hcd, hc, hc_regs, qtd,
+                                                 DWC_OTG_HC_XFER_COMPLETE);
+               }
+               complete_periodic_xfer(hcd, hc, hc_regs, qtd, halt_status);
+               break;
+       }
+
+handle_xfercomp_done:
+       disable_hc_int(hc_regs, xfercompl);
+
+       return 1;
+}
+
+/**
+ * Handles a host channel STALL interrupt. This handler may be called in
+ * either DMA mode or Slave mode.
+ */
+static int32_t handle_hc_stall_intr(dwc_otg_hcd_t * hcd,
+                                   dwc_hc_t * hc,
+                                   dwc_otg_hc_regs_t * hc_regs,
+                                   dwc_otg_qtd_t * qtd)
+{
+       dwc_otg_hcd_urb_t *urb = qtd->urb;
+       int pipe_type = dwc_otg_hcd_get_pipe_type(&urb->pipe_info);
+
+       DWC_DEBUGPL(DBG_HCD, "--Host Channel %d Interrupt: "
+                   "STALL Received--\n", hc->hc_num);
+
+       if (hcd->core_if->dma_desc_enable) {
+               dwc_otg_hcd_complete_xfer_ddma(hcd, hc, hc_regs, DWC_OTG_HC_XFER_STALL);
+               goto handle_stall_done;
+       }
+
+       if (pipe_type == UE_CONTROL) {
+               hcd->fops->complete(hcd, urb->priv, urb, -DWC_E_PIPE);
+       }
+
+       if (pipe_type == UE_BULK || pipe_type == UE_INTERRUPT) {
+               hcd->fops->complete(hcd, urb->priv, urb, -DWC_E_PIPE);
+               /*
+                * USB protocol requires resetting the data toggle for bulk
+                * and interrupt endpoints when a CLEAR_FEATURE(ENDPOINT_HALT)
+                * setup command is issued to the endpoint. Anticipate the
+                * CLEAR_FEATURE command since a STALL has occurred and reset
+                * the data toggle now.
+                */
+               hc->qh->data_toggle = 0;
+       }
+
+       halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_STALL);
+
+handle_stall_done:
+       disable_hc_int(hc_regs, stall);
+
+       return 1;
+}
+
+/*
+ * Updates the state of the URB when a transfer has been stopped due to an
+ * abnormal condition before the transfer completes. Modifies the
+ * actual_length field of the URB to reflect the number of bytes that have
+ * actually been transferred via the host channel.
+ */
+static void update_urb_state_xfer_intr(dwc_hc_t * hc,
+                                      dwc_otg_hc_regs_t * hc_regs,
+                                      dwc_otg_hcd_urb_t * urb,
+                                      dwc_otg_qtd_t * qtd,
+                                      dwc_otg_halt_status_e halt_status)
+{
+       uint32_t bytes_transferred = get_actual_xfer_length(hc, hc_regs, qtd,
+                                                           halt_status, NULL);
+
+       if (urb->actual_length + bytes_transferred > urb->length) {
+               printk_once(KERN_DEBUG "dwc_otg: DEVICE:%03d : %s:%d:trimming xfer length\n",
+                       hc->dev_addr, __func__, __LINE__);
+               bytes_transferred = urb->length - urb->actual_length;
+       }
+
+       /* non DWORD-aligned buffer case handling. */
+       if (hc->align_buff && bytes_transferred && hc->ep_is_in) {
+               dwc_memcpy(urb->buf + urb->actual_length, hc->qh->dw_align_buf,
+                          bytes_transferred);
+       }
+
+       urb->actual_length += bytes_transferred;
+
+#ifdef DEBUG
+       {
+               hctsiz_data_t hctsiz;
+               hctsiz.d32 = DWC_READ_REG32(&hc_regs->hctsiz);
+               DWC_DEBUGPL(DBG_HCDV, "DWC_otg: %s: %s, channel %d\n",
+                           __func__, (hc->ep_is_in ? "IN" : "OUT"),
+                           hc->hc_num);
+               DWC_DEBUGPL(DBG_HCDV, "  hc->start_pkt_count %d\n",
+                           hc->start_pkt_count);
+               DWC_DEBUGPL(DBG_HCDV, "  hctsiz.pktcnt %d\n", hctsiz.b.pktcnt);
+               DWC_DEBUGPL(DBG_HCDV, "  hc->max_packet %d\n", hc->max_packet);
+               DWC_DEBUGPL(DBG_HCDV, "  bytes_transferred %d\n",
+                           bytes_transferred);
+               DWC_DEBUGPL(DBG_HCDV, "  urb->actual_length %d\n",
+                           urb->actual_length);
+               DWC_DEBUGPL(DBG_HCDV, "  urb->transfer_buffer_length %d\n",
+                           urb->length);
+       }
+#endif
+}
+
+/**
+ * Handles a host channel NAK interrupt. This handler may be called in either
+ * DMA mode or Slave mode.
+ */
+static int32_t handle_hc_nak_intr(dwc_otg_hcd_t * hcd,
+                                 dwc_hc_t * hc,
+                                 dwc_otg_hc_regs_t * hc_regs,
+                                 dwc_otg_qtd_t * qtd)
+{
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+                   "NAK Received--\n", hc->hc_num);
+
+       /*
+        * When we get bulk NAKs then remember this so we holdoff on this qh until
+        * the beginning of the next frame
+        */
+       switch(dwc_otg_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
+               case UE_BULK:
+               case UE_CONTROL:
+               if (nak_holdoff && qtd->qh->do_split)
+                       hc->qh->nak_frame = dwc_otg_hcd_get_frame_number(hcd);
+       }
+
+       /*
+        * Handle NAK for IN/OUT SSPLIT/CSPLIT transfers, bulk, control, and
+        * interrupt.  Re-start the SSPLIT transfer.
+        */
+       if (hc->do_split) {
+               if (hc->complete_split) {
+                       qtd->error_count = 0;
+               }
+               qtd->complete_split = 0;
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NAK);
+               goto handle_nak_done;
+       }
+
+       switch (dwc_otg_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
+       case UE_CONTROL:
+       case UE_BULK:
+               if (hcd->core_if->dma_enable && hc->ep_is_in) {
+                       /*
+                        * NAK interrupts are enabled on bulk/control IN
+                        * transfers in DMA mode for the sole purpose of
+                        * resetting the error count after a transaction error
+                        * occurs. The core will continue transferring data.
+                        * Disable other interrupts unmasked for the same
+                        * reason.
+                        */
+                       disable_hc_int(hc_regs, datatglerr);
+                       disable_hc_int(hc_regs, ack);
+                       qtd->error_count = 0;
+                       goto handle_nak_done;
+               }
+
+               /*
+                * NAK interrupts normally occur during OUT transfers in DMA
+                * or Slave mode. For IN transfers, more requests will be
+                * queued as request queue space is available.
+                */
+               qtd->error_count = 0;
+
+               if (!hc->qh->ping_state) {
+                       update_urb_state_xfer_intr(hc, hc_regs,
+                                                  qtd->urb, qtd,
+                                                  DWC_OTG_HC_XFER_NAK);
+                       dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+
+                       if (hc->speed == DWC_OTG_EP_SPEED_HIGH)
+                               hc->qh->ping_state = 1;
+               }
+
+               /*
+                * Halt the channel so the transfer can be re-started from
+                * the appropriate point or the PING protocol will
+                * start/continue.
+                */
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NAK);
+               break;
+       case UE_INTERRUPT:
+               qtd->error_count = 0;
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NAK);
+               break;
+       case UE_ISOCHRONOUS:
+               /* Should never get called for isochronous transfers. */
+               DWC_ASSERT(1, "NACK interrupt for ISOC transfer\n");
+               break;
+       }
+
+handle_nak_done:
+       disable_hc_int(hc_regs, nak);
+
+       return 1;
+}
+
+/**
+ * Handles a host channel ACK interrupt. This interrupt is enabled when
+ * performing the PING protocol in Slave mode, when errors occur during
+ * either Slave mode or DMA mode, and during Start Split transactions.
+ */
+static int32_t handle_hc_ack_intr(dwc_otg_hcd_t * hcd,
+                                 dwc_hc_t * hc,
+                                 dwc_otg_hc_regs_t * hc_regs,
+                                 dwc_otg_qtd_t * qtd)
+{
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+                   "ACK Received--\n", hc->hc_num);
+
+       if (hc->do_split) {
+               /*
+                * Handle ACK on SSPLIT.
+                * ACK should not occur in CSPLIT.
+                */
+               if (!hc->ep_is_in && hc->data_pid_start != DWC_OTG_HC_PID_SETUP) {
+                       qtd->ssplit_out_xfer_count = hc->xfer_len;
+               }
+               if (!(hc->ep_type == DWC_OTG_EP_TYPE_ISOC && !hc->ep_is_in)) {
+                       /* Don't need complete for isochronous out transfers. */
+                       qtd->complete_split = 1;
+               }
+
+               /* ISOC OUT */
+               if (hc->ep_type == DWC_OTG_EP_TYPE_ISOC && !hc->ep_is_in) {
+                       switch (hc->xact_pos) {
+                       case DWC_HCSPLIT_XACTPOS_ALL:
+                               break;
+                       case DWC_HCSPLIT_XACTPOS_END:
+                               qtd->isoc_split_pos = DWC_HCSPLIT_XACTPOS_ALL;
+                               qtd->isoc_split_offset = 0;
+                               break;
+                       case DWC_HCSPLIT_XACTPOS_BEGIN:
+                       case DWC_HCSPLIT_XACTPOS_MID:
+                               /*
+                                * For BEGIN or MID, calculate the length for
+                                * the next microframe to determine the correct
+                                * SSPLIT token, either MID or END.
+                                */
+                               {
+                                       struct dwc_otg_hcd_iso_packet_desc
+                                       *frame_desc;
+
+                                       frame_desc =
+                                           &qtd->urb->
+                                           iso_descs[qtd->isoc_frame_index];
+                                       qtd->isoc_split_offset += 188;
+
+                                       if ((frame_desc->length -
+                                            qtd->isoc_split_offset) <= 188) {
+                                               qtd->isoc_split_pos =
+                                                   DWC_HCSPLIT_XACTPOS_END;
+                                       } else {
+                                               qtd->isoc_split_pos =
+                                                   DWC_HCSPLIT_XACTPOS_MID;
+                                       }
+
+                               }
+                               break;
+                       }
+               } else {
+                       halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_ACK);
+               }
+       } else {
+               /*
+                * An unmasked ACK on a non-split DMA transaction is
+                * for the sole purpose of resetting error counts. Disable other
+                * interrupts unmasked for the same reason.
+                */
+               if(hcd->core_if->dma_enable) {
+                       disable_hc_int(hc_regs, datatglerr);
+                       disable_hc_int(hc_regs, nak);
+               }
+               qtd->error_count = 0;
+
+               if (hc->qh->ping_state) {
+                       hc->qh->ping_state = 0;
+                       /*
+                        * Halt the channel so the transfer can be re-started
+                        * from the appropriate point. This only happens in
+                        * Slave mode. In DMA mode, the ping_state is cleared
+                        * when the transfer is started because the core
+                        * automatically executes the PING, then the transfer.
+                        */
+                       halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_ACK);
+               }
+       }
+
+       /*
+        * If the ACK occurred when _not_ in the PING state, let the channel
+        * continue transferring data after clearing the error count.
+        */
+
+       disable_hc_int(hc_regs, ack);
+
+       return 1;
+}
+
+/**
+ * Handles a host channel NYET interrupt. This interrupt should only occur on
+ * Bulk and Control OUT endpoints and for complete split transactions. If a
+ * NYET occurs at the same time as a Transfer Complete interrupt, it is
+ * handled in the xfercomp interrupt handler, not here. This handler may be
+ * called in either DMA mode or Slave mode.
+ */
+static int32_t handle_hc_nyet_intr(dwc_otg_hcd_t * hcd,
+                                  dwc_hc_t * hc,
+                                  dwc_otg_hc_regs_t * hc_regs,
+                                  dwc_otg_qtd_t * qtd)
+{
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+                   "NYET Received--\n", hc->hc_num);
+
+       /*
+        * NYET on CSPLIT
+        * re-do the CSPLIT immediately on non-periodic
+        */
+       if (hc->do_split && hc->complete_split) {
+               if (hc->ep_is_in && (hc->ep_type == DWC_OTG_EP_TYPE_ISOC)
+                   && hcd->core_if->dma_enable) {
+                       qtd->complete_split = 0;
+                       qtd->isoc_split_offset = 0;
+                       if (++qtd->isoc_frame_index == qtd->urb->packet_count) {
+                               hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, 0);
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+                       }
+                       else
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+                       goto handle_nyet_done;
+               }
+
+               if (hc->ep_type == DWC_OTG_EP_TYPE_INTR ||
+                   hc->ep_type == DWC_OTG_EP_TYPE_ISOC) {
+                       int frnum = dwc_otg_hcd_get_frame_number(hcd);
+
+                       // With the FIQ running we only ever see the failed NYET
+                       if (dwc_full_frame_num(frnum) !=
+                           dwc_full_frame_num(hc->qh->sched_frame) ||
+                           fiq_fsm_enable) {
+                               /*
+                                * No longer in the same full speed frame.
+                                * Treat this as a transaction error.
+                                */
+#if 0
+                               /** @todo Fix system performance so this can
+                                * be treated as an error. Right now complete
+                                * splits cannot be scheduled precisely enough
+                                * due to other system activity, so this error
+                                * occurs regularly in Slave mode.
+                                */
+                               qtd->error_count++;
+#endif
+                               qtd->complete_split = 0;
+                               halt_channel(hcd, hc, qtd,
+                                            DWC_OTG_HC_XFER_XACT_ERR);
+                               /** @todo add support for isoc release */
+                               goto handle_nyet_done;
+                       }
+               }
+
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NYET);
+               goto handle_nyet_done;
+       }
+
+       hc->qh->ping_state = 1;
+       qtd->error_count = 0;
+
+       update_urb_state_xfer_intr(hc, hc_regs, qtd->urb, qtd,
+                                  DWC_OTG_HC_XFER_NYET);
+       dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+
+       /*
+        * Halt the channel and re-start the transfer so the PING
+        * protocol will start.
+        */
+       halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NYET);
+
+handle_nyet_done:
+       disable_hc_int(hc_regs, nyet);
+       return 1;
+}
+
+/**
+ * Handles a host channel babble interrupt. This handler may be called in
+ * either DMA mode or Slave mode.
+ */
+static int32_t handle_hc_babble_intr(dwc_otg_hcd_t * hcd,
+                                    dwc_hc_t * hc,
+                                    dwc_otg_hc_regs_t * hc_regs,
+                                    dwc_otg_qtd_t * qtd)
+{
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+                   "Babble Error--\n", hc->hc_num);
+
+       if (hcd->core_if->dma_desc_enable) {
+               dwc_otg_hcd_complete_xfer_ddma(hcd, hc, hc_regs,
+                                              DWC_OTG_HC_XFER_BABBLE_ERR);
+               goto handle_babble_done;
+       }
+
+       if (hc->ep_type != DWC_OTG_EP_TYPE_ISOC) {
+               hcd->fops->complete(hcd, qtd->urb->priv,
+                                   qtd->urb, -DWC_E_OVERFLOW);
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_BABBLE_ERR);
+       } else {
+               dwc_otg_halt_status_e halt_status;
+               halt_status = update_isoc_urb_state(hcd, hc, hc_regs, qtd,
+                                                   DWC_OTG_HC_XFER_BABBLE_ERR);
+               halt_channel(hcd, hc, qtd, halt_status);
+       }
+
+handle_babble_done:
+       disable_hc_int(hc_regs, bblerr);
+       return 1;
+}
+
+/**
+ * Handles a host channel AHB error interrupt. This handler is only called in
+ * DMA mode.
+ */
+static int32_t handle_hc_ahberr_intr(dwc_otg_hcd_t * hcd,
+                                    dwc_hc_t * hc,
+                                    dwc_otg_hc_regs_t * hc_regs,
+                                    dwc_otg_qtd_t * qtd)
+{
+       hcchar_data_t hcchar;
+       hcsplt_data_t hcsplt;
+       hctsiz_data_t hctsiz;
+       uint32_t hcdma;
+       char *pipetype, *speed;
+
+       dwc_otg_hcd_urb_t *urb = qtd->urb;
+
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+                   "AHB Error--\n", hc->hc_num);
+
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       hcsplt.d32 = DWC_READ_REG32(&hc_regs->hcsplt);
+       hctsiz.d32 = DWC_READ_REG32(&hc_regs->hctsiz);
+       hcdma = DWC_READ_REG32(&hc_regs->hcdma);
+
+       DWC_ERROR("AHB ERROR, Channel %d\n", hc->hc_num);
+       DWC_ERROR("  hcchar 0x%08x, hcsplt 0x%08x\n", hcchar.d32, hcsplt.d32);
+       DWC_ERROR("  hctsiz 0x%08x, hcdma 0x%08x\n", hctsiz.d32, hcdma);
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD URB Enqueue\n");
+       DWC_ERROR("  Device address: %d\n",
+                 dwc_otg_hcd_get_dev_addr(&urb->pipe_info));
+       DWC_ERROR("  Endpoint: %d, %s\n",
+                 dwc_otg_hcd_get_ep_num(&urb->pipe_info),
+                 (dwc_otg_hcd_is_pipe_in(&urb->pipe_info) ? "IN" : "OUT"));
+
+       switch (dwc_otg_hcd_get_pipe_type(&urb->pipe_info)) {
+       case UE_CONTROL:
+               pipetype = "CONTROL";
+               break;
+       case UE_BULK:
+               pipetype = "BULK";
+               break;
+       case UE_INTERRUPT:
+               pipetype = "INTERRUPT";
+               break;
+       case UE_ISOCHRONOUS:
+               pipetype = "ISOCHRONOUS";
+               break;
+       default:
+               pipetype = "UNKNOWN";
+               break;
+       }
+
+       DWC_ERROR("  Endpoint type: %s\n", pipetype);
+
+       switch (hc->speed) {
+       case DWC_OTG_EP_SPEED_HIGH:
+               speed = "HIGH";
+               break;
+       case DWC_OTG_EP_SPEED_FULL:
+               speed = "FULL";
+               break;
+       case DWC_OTG_EP_SPEED_LOW:
+               speed = "LOW";
+               break;
+       default:
+               speed = "UNKNOWN";
+               break;
+       };
+
+       DWC_ERROR("  Speed: %s\n", speed);
+
+       DWC_ERROR("  Max packet size: %d\n",
+                 dwc_otg_hcd_get_mps(&urb->pipe_info));
+       DWC_ERROR("  Data buffer length: %d\n", urb->length);
+       DWC_ERROR("  Transfer buffer: %p, Transfer DMA: %p\n",
+                 urb->buf, (void *)urb->dma);
+       DWC_ERROR("  Setup buffer: %p, Setup DMA: %p\n",
+                 urb->setup_packet, (void *)urb->setup_dma);
+       DWC_ERROR("  Interval: %d\n", urb->interval);
+
+       /* Core haltes the channel for Descriptor DMA mode */
+       if (hcd->core_if->dma_desc_enable) {
+               dwc_otg_hcd_complete_xfer_ddma(hcd, hc, hc_regs,
+                                              DWC_OTG_HC_XFER_AHB_ERR);
+               goto handle_ahberr_done;
+       }
+
+       hcd->fops->complete(hcd, urb->priv, urb, -DWC_E_IO);
+
+       /*
+        * Force a channel halt. Don't call halt_channel because that won't
+        * write to the HCCHARn register in DMA mode to force the halt.
+        */
+       dwc_otg_hc_halt(hcd->core_if, hc, DWC_OTG_HC_XFER_AHB_ERR);
+handle_ahberr_done:
+       disable_hc_int(hc_regs, ahberr);
+       return 1;
+}
+
+/**
+ * Handles a host channel transaction error interrupt. This handler may be
+ * called in either DMA mode or Slave mode.
+ */
+static int32_t handle_hc_xacterr_intr(dwc_otg_hcd_t * hcd,
+                                     dwc_hc_t * hc,
+                                     dwc_otg_hc_regs_t * hc_regs,
+                                     dwc_otg_qtd_t * qtd)
+{
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+                   "Transaction Error--\n", hc->hc_num);
+
+       if (hcd->core_if->dma_desc_enable) {
+               dwc_otg_hcd_complete_xfer_ddma(hcd, hc, hc_regs,
+                                              DWC_OTG_HC_XFER_XACT_ERR);
+               goto handle_xacterr_done;
+       }
+
+       switch (dwc_otg_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
+       case UE_CONTROL:
+       case UE_BULK:
+               qtd->error_count++;
+               if (!hc->qh->ping_state) {
+
+                       update_urb_state_xfer_intr(hc, hc_regs,
+                                                  qtd->urb, qtd,
+                                                  DWC_OTG_HC_XFER_XACT_ERR);
+                       dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+                       if (!hc->ep_is_in && hc->speed == DWC_OTG_EP_SPEED_HIGH) {
+                               hc->qh->ping_state = 1;
+                       }
+               }
+
+               /*
+                * Halt the channel so the transfer can be re-started from
+                * the appropriate point or the PING protocol will start.
+                */
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_XACT_ERR);
+               break;
+       case UE_INTERRUPT:
+               qtd->error_count++;
+               if (hc->do_split && hc->complete_split) {
+                       qtd->complete_split = 0;
+               }
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_XACT_ERR);
+               break;
+       case UE_ISOCHRONOUS:
+               {
+                       dwc_otg_halt_status_e halt_status;
+                       halt_status =
+                           update_isoc_urb_state(hcd, hc, hc_regs, qtd,
+                                                 DWC_OTG_HC_XFER_XACT_ERR);
+
+                       halt_channel(hcd, hc, qtd, halt_status);
+               }
+               break;
+       }
+handle_xacterr_done:
+       disable_hc_int(hc_regs, xacterr);
+
+       return 1;
+}
+
+/**
+ * Handles a host channel frame overrun interrupt. This handler may be called
+ * in either DMA mode or Slave mode.
+ */
+static int32_t handle_hc_frmovrun_intr(dwc_otg_hcd_t * hcd,
+                                      dwc_hc_t * hc,
+                                      dwc_otg_hc_regs_t * hc_regs,
+                                      dwc_otg_qtd_t * qtd)
+{
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+                   "Frame Overrun--\n", hc->hc_num);
+
+       switch (dwc_otg_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
+       case UE_CONTROL:
+       case UE_BULK:
+               break;
+       case UE_INTERRUPT:
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_FRAME_OVERRUN);
+               break;
+       case UE_ISOCHRONOUS:
+               {
+                       dwc_otg_halt_status_e halt_status;
+                       halt_status =
+                           update_isoc_urb_state(hcd, hc, hc_regs, qtd,
+                                                 DWC_OTG_HC_XFER_FRAME_OVERRUN);
+
+                       halt_channel(hcd, hc, qtd, halt_status);
+               }
+               break;
+       }
+
+       disable_hc_int(hc_regs, frmovrun);
+
+       return 1;
+}
+
+/**
+ * Handles a host channel data toggle error interrupt. This handler may be
+ * called in either DMA mode or Slave mode.
+ */
+static int32_t handle_hc_datatglerr_intr(dwc_otg_hcd_t * hcd,
+                                        dwc_hc_t * hc,
+                                        dwc_otg_hc_regs_t * hc_regs,
+                                        dwc_otg_qtd_t * qtd)
+{
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+               "Data Toggle Error on %s transfer--\n",
+               hc->hc_num, (hc->ep_is_in ? "IN" : "OUT"));
+
+       /* Data toggles on split transactions cause the hc to halt.
+        * restart transfer */
+       if(hc->qh->do_split)
+       {
+               qtd->error_count++;
+               dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+               update_urb_state_xfer_intr(hc, hc_regs,
+                       qtd->urb, qtd, DWC_OTG_HC_XFER_XACT_ERR);
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_XACT_ERR);
+       } else if (hc->ep_is_in) {
+               /* An unmasked data toggle error on a non-split DMA transaction is
+                * for the sole purpose of resetting error counts. Disable other
+                * interrupts unmasked for the same reason.
+                */
+               if(hcd->core_if->dma_enable) {
+                       disable_hc_int(hc_regs, ack);
+                       disable_hc_int(hc_regs, nak);
+               }
+               qtd->error_count = 0;
+       }
+
+       disable_hc_int(hc_regs, datatglerr);
+
+       return 1;
+}
+
+#ifdef DEBUG
+/**
+ * This function is for debug only. It checks that a valid halt status is set
+ * and that HCCHARn.chdis is clear. If there's a problem, corrective action is
+ * taken and a warning is issued.
+ * @return 1 if halt status is ok, 0 otherwise.
+ */
+static inline int halt_status_ok(dwc_otg_hcd_t * hcd,
+                                dwc_hc_t * hc,
+                                dwc_otg_hc_regs_t * hc_regs,
+                                dwc_otg_qtd_t * qtd)
+{
+       hcchar_data_t hcchar;
+       hctsiz_data_t hctsiz;
+       hcint_data_t hcint;
+       hcintmsk_data_t hcintmsk;
+       hcsplt_data_t hcsplt;
+
+       if (hc->halt_status == DWC_OTG_HC_XFER_NO_HALT_STATUS) {
+               /*
+                * This code is here only as a check. This condition should
+                * never happen. Ignore the halt if it does occur.
+                */
+               hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+               hctsiz.d32 = DWC_READ_REG32(&hc_regs->hctsiz);
+               hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+               hcintmsk.d32 = DWC_READ_REG32(&hc_regs->hcintmsk);
+               hcsplt.d32 = DWC_READ_REG32(&hc_regs->hcsplt);
+               DWC_WARN
+                   ("%s: hc->halt_status == DWC_OTG_HC_XFER_NO_HALT_STATUS, "
+                    "channel %d, hcchar 0x%08x, hctsiz 0x%08x, "
+                    "hcint 0x%08x, hcintmsk 0x%08x, "
+                    "hcsplt 0x%08x, qtd->complete_split %d\n", __func__,
+                    hc->hc_num, hcchar.d32, hctsiz.d32, hcint.d32,
+                    hcintmsk.d32, hcsplt.d32, qtd->complete_split);
+
+               DWC_WARN("%s: no halt status, channel %d, ignoring interrupt\n",
+                        __func__, hc->hc_num);
+               DWC_WARN("\n");
+               clear_hc_int(hc_regs, chhltd);
+               return 0;
+       }
+
+       /*
+        * This code is here only as a check. hcchar.chdis should
+        * never be set when the halt interrupt occurs. Halt the
+        * channel again if it does occur.
+        */
+       hcchar.d32 = DWC_READ_REG32(&hc_regs->hcchar);
+       if (hcchar.b.chdis) {
+               DWC_WARN("%s: hcchar.chdis set unexpectedly, "
+                        "hcchar 0x%08x, trying to halt again\n",
+                        __func__, hcchar.d32);
+               clear_hc_int(hc_regs, chhltd);
+               hc->halt_pending = 0;
+               halt_channel(hcd, hc, qtd, hc->halt_status);
+               return 0;
+       }
+
+       return 1;
+}
+#endif
+
+/**
+ * Handles a host Channel Halted interrupt in DMA mode. This handler
+ * determines the reason the channel halted and proceeds accordingly.
+ */
+static void handle_hc_chhltd_intr_dma(dwc_otg_hcd_t * hcd,
+                                     dwc_hc_t * hc,
+                                     dwc_otg_hc_regs_t * hc_regs,
+                                     dwc_otg_qtd_t * qtd)
+{
+       int out_nak_enh = 0;
+       hcint_data_t hcint;
+       hcintmsk_data_t hcintmsk;
+       /* For core with OUT NAK enhancement, the flow for high-
+        * speed CONTROL/BULK OUT is handled a little differently.
+        */
+       if (hcd->core_if->snpsid >= OTG_CORE_REV_2_71a) {
+               if (hc->speed == DWC_OTG_EP_SPEED_HIGH && !hc->ep_is_in &&
+                   (hc->ep_type == DWC_OTG_EP_TYPE_CONTROL ||
+                    hc->ep_type == DWC_OTG_EP_TYPE_BULK)) {
+                       out_nak_enh = 1;
+               }
+       }
+
+       if (hc->halt_status == DWC_OTG_HC_XFER_URB_DEQUEUE ||
+           (hc->halt_status == DWC_OTG_HC_XFER_AHB_ERR
+            && !hcd->core_if->dma_desc_enable)) {
+               /*
+                * Just release the channel. A dequeue can happen on a
+                * transfer timeout. In the case of an AHB Error, the channel
+                * was forced to halt because there's no way to gracefully
+                * recover.
+                */
+               if (hcd->core_if->dma_desc_enable)
+                       dwc_otg_hcd_complete_xfer_ddma(hcd, hc, hc_regs,
+                                                      hc->halt_status);
+               else
+                       release_channel(hcd, hc, qtd, hc->halt_status);
+               return;
+       }
+
+       /* Read the HCINTn register to determine the cause for the halt. */
+
+       hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+       hcintmsk.d32 = DWC_READ_REG32(&hc_regs->hcintmsk);
+
+       if (hcint.b.xfercomp) {
+               /** @todo This is here because of a possible hardware bug.  Spec
+                * says that on SPLIT-ISOC OUT transfers in DMA mode that a HALT
+                * interrupt w/ACK bit set should occur, but I only see the
+                * XFERCOMP bit, even with it masked out.  This is a workaround
+                * for that behavior.  Should fix this when hardware is fixed.
+                */
+               if (hc->ep_type == DWC_OTG_EP_TYPE_ISOC && !hc->ep_is_in) {
+                       handle_hc_ack_intr(hcd, hc, hc_regs, qtd);
+               }
+               handle_hc_xfercomp_intr(hcd, hc, hc_regs, qtd);
+       } else if (hcint.b.stall) {
+               handle_hc_stall_intr(hcd, hc, hc_regs, qtd);
+       } else if (hcint.b.xacterr && !hcd->core_if->dma_desc_enable) {
+               if (out_nak_enh) {
+                       if (hcint.b.nyet || hcint.b.nak || hcint.b.ack) {
+                               DWC_DEBUGPL(DBG_HCD, "XactErr with NYET/NAK/ACK\n");
+                               qtd->error_count = 0;
+                       } else {
+                               DWC_DEBUGPL(DBG_HCD, "XactErr without NYET/NAK/ACK\n");
+                       }
+               }
+
+               /*
+                * Must handle xacterr before nak or ack. Could get a xacterr
+                * at the same time as either of these on a BULK/CONTROL OUT
+                * that started with a PING. The xacterr takes precedence.
+                */
+               handle_hc_xacterr_intr(hcd, hc, hc_regs, qtd);
+       } else if (hcint.b.xcs_xact && hcd->core_if->dma_desc_enable) {
+               handle_hc_xacterr_intr(hcd, hc, hc_regs, qtd);
+       } else if (hcint.b.ahberr && hcd->core_if->dma_desc_enable) {
+               handle_hc_ahberr_intr(hcd, hc, hc_regs, qtd);
+       } else if (hcint.b.bblerr) {
+               handle_hc_babble_intr(hcd, hc, hc_regs, qtd);
+       } else if (hcint.b.frmovrun) {
+               handle_hc_frmovrun_intr(hcd, hc, hc_regs, qtd);
+       } else if (hcint.b.datatglerr) {
+               handle_hc_datatglerr_intr(hcd, hc, hc_regs, qtd);
+       } else if (!out_nak_enh) {
+               if (hcint.b.nyet) {
+                       /*
+                        * Must handle nyet before nak or ack. Could get a nyet at the
+                        * same time as either of those on a BULK/CONTROL OUT that
+                        * started with a PING. The nyet takes precedence.
+                        */
+                       handle_hc_nyet_intr(hcd, hc, hc_regs, qtd);
+               } else if (hcint.b.nak && !hcintmsk.b.nak) {
+                       /*
+                        * If nak is not masked, it's because a non-split IN transfer
+                        * is in an error state. In that case, the nak is handled by
+                        * the nak interrupt handler, not here. Handle nak here for
+                        * BULK/CONTROL OUT transfers, which halt on a NAK to allow
+                        * rewinding the buffer pointer.
+                        */
+                       handle_hc_nak_intr(hcd, hc, hc_regs, qtd);
+               } else if (hcint.b.ack && !hcintmsk.b.ack) {
+                       /*
+                        * If ack is not masked, it's because a non-split IN transfer
+                        * is in an error state. In that case, the ack is handled by
+                        * the ack interrupt handler, not here. Handle ack here for
+                        * split transfers. Start splits halt on ACK.
+                        */
+                       handle_hc_ack_intr(hcd, hc, hc_regs, qtd);
+               } else {
+                       if (hc->ep_type == DWC_OTG_EP_TYPE_INTR ||
+                           hc->ep_type == DWC_OTG_EP_TYPE_ISOC) {
+                               /*
+                                * A periodic transfer halted with no other channel
+                                * interrupts set. Assume it was halted by the core
+                                * because it could not be completed in its scheduled
+                                * (micro)frame.
+                                */
+#ifdef DEBUG
+                               DWC_PRINTF
+                                   ("%s: Halt channel %d (assume incomplete periodic transfer)\n",
+                                    __func__, hc->hc_num);
+#endif
+                               halt_channel(hcd, hc, qtd,
+                                            DWC_OTG_HC_XFER_PERIODIC_INCOMPLETE);
+                       } else {
+                               DWC_ERROR
+                                   ("%s: Channel %d, DMA Mode -- ChHltd set, but reason "
+                                    "for halting is unknown, hcint 0x%08x, intsts 0x%08x\n",
+                                    __func__, hc->hc_num, hcint.d32,
+                                    DWC_READ_REG32(&hcd->
+                                                   core_if->core_global_regs->
+                                                   gintsts));
+                               /* Failthrough: use 3-strikes rule */
+                               qtd->error_count++;
+                               dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+                               update_urb_state_xfer_intr(hc, hc_regs,
+                                          qtd->urb, qtd, DWC_OTG_HC_XFER_XACT_ERR);
+                               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_XACT_ERR);
+                       }
+
+               }
+       } else {
+               DWC_PRINTF("NYET/NAK/ACK/other in non-error case, 0x%08x\n",
+                          hcint.d32);
+               /* Failthrough: use 3-strikes rule */
+               qtd->error_count++;
+               dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+               update_urb_state_xfer_intr(hc, hc_regs,
+                          qtd->urb, qtd, DWC_OTG_HC_XFER_XACT_ERR);
+               halt_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_XACT_ERR);
+       }
+}
+
+/**
+ * Handles a host channel Channel Halted interrupt.
+ *
+ * In slave mode, this handler is called only when the driver specifically
+ * requests a halt. This occurs during handling other host channel interrupts
+ * (e.g. nak, xacterr, stall, nyet, etc.).
+ *
+ * In DMA mode, this is the interrupt that occurs when the core has finished
+ * processing a transfer on a channel. Other host channel interrupts (except
+ * ahberr) are disabled in DMA mode.
+ */
+static int32_t handle_hc_chhltd_intr(dwc_otg_hcd_t * hcd,
+                                    dwc_hc_t * hc,
+                                    dwc_otg_hc_regs_t * hc_regs,
+                                    dwc_otg_qtd_t * qtd)
+{
+       DWC_DEBUGPL(DBG_HCDI, "--Host Channel %d Interrupt: "
+                   "Channel Halted--\n", hc->hc_num);
+
+       if (hcd->core_if->dma_enable) {
+               handle_hc_chhltd_intr_dma(hcd, hc, hc_regs, qtd);
+       } else {
+#ifdef DEBUG
+               if (!halt_status_ok(hcd, hc, hc_regs, qtd)) {
+                       return 1;
+               }
+#endif
+               release_channel(hcd, hc, qtd, hc->halt_status);
+       }
+
+       return 1;
+}
+
+
+/**
+ * dwc_otg_fiq_unmangle_isoc() - Update the iso_frame_desc structure on
+ * FIQ transfer completion
+ * @hcd:       Pointer to dwc_otg_hcd struct
+ * @num:       Host channel number
+ *
+ * 1. Un-mangle the status as recorded in each iso_frame_desc status
+ * 2. Copy it from the dwc_otg_urb into the real URB
+ */
+void dwc_otg_fiq_unmangle_isoc(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh, dwc_otg_qtd_t *qtd, uint32_t num)
+{
+       struct dwc_otg_hcd_urb *dwc_urb = qtd->urb;
+       int nr_frames = dwc_urb->packet_count;
+       int i;
+       hcint_data_t frame_hcint;
+
+       for (i = 0; i < nr_frames; i++) {
+               frame_hcint.d32 = dwc_urb->iso_descs[i].status;
+               if (frame_hcint.b.xfercomp) {
+                       dwc_urb->iso_descs[i].status = 0;
+                       dwc_urb->actual_length += dwc_urb->iso_descs[i].actual_length;
+               } else if (frame_hcint.b.frmovrun) {
+                       if (qh->ep_is_in)
+                               dwc_urb->iso_descs[i].status = -DWC_E_NO_STREAM_RES;
+                       else
+                               dwc_urb->iso_descs[i].status = -DWC_E_COMMUNICATION;
+                       dwc_urb->error_count++;
+                       dwc_urb->iso_descs[i].actual_length = 0;
+               } else if (frame_hcint.b.xacterr) {
+                       dwc_urb->iso_descs[i].status = -DWC_E_PROTOCOL;
+                       dwc_urb->error_count++;
+                       dwc_urb->iso_descs[i].actual_length = 0;
+               } else if (frame_hcint.b.bblerr) {
+                       dwc_urb->iso_descs[i].status = -DWC_E_OVERFLOW;
+                       dwc_urb->error_count++;
+                       dwc_urb->iso_descs[i].actual_length = 0;
+               } else {
+                       /* Something went wrong */
+                       dwc_urb->iso_descs[i].status = -1;
+                       dwc_urb->iso_descs[i].actual_length = 0;
+                       dwc_urb->error_count++;
+               }
+       }
+       qh->sched_frame = dwc_frame_num_inc(qh->sched_frame, qh->interval * (nr_frames - 1));
+
+       //printk_ratelimited(KERN_INFO "%s: HS isochronous of %d/%d frames with %d errors complete\n",
+       //                      __FUNCTION__, i, dwc_urb->packet_count, dwc_urb->error_count);
+}
+
+/**
+ * dwc_otg_fiq_unsetup_per_dma() - Remove data from bounce buffers for split transactions
+ * @hcd:       Pointer to dwc_otg_hcd struct
+ * @num:       Host channel number
+ *
+ * Copies data from the FIQ bounce buffers into the URB's transfer buffer. Does not modify URB state.
+ * Returns total length of data or -1 if the buffers were not used.
+ *
+ */
+int dwc_otg_fiq_unsetup_per_dma(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh, dwc_otg_qtd_t *qtd, uint32_t num)
+{
+       dwc_hc_t *hc = qh->channel;
+       struct fiq_dma_blob *blob = hcd->fiq_dmab;
+       struct fiq_channel_state *st = &hcd->fiq_state->channel[num];
+       uint8_t *ptr = NULL;
+       int index = 0, len = 0;
+       int i = 0;
+       if (hc->ep_is_in) {
+               /* Copy data out of the DMA bounce buffers to the URB's buffer.
+                * The align_buf is ignored as this is ignored on FSM enqueue. */
+               ptr = qtd->urb->buf;
+               if (qh->ep_type == UE_ISOCHRONOUS) {
+                       /* Isoc IN transactions - grab the offset of the iso_frame_desc into the URB transfer buffer */
+                       index = qtd->isoc_frame_index;
+                       ptr += qtd->urb->iso_descs[index].offset;
+               } else {
+                       /* Need to increment by actual_length for interrupt IN */
+                       ptr += qtd->urb->actual_length;
+               }
+
+               for (i = 0; i < st->dma_info.index; i++) {
+                       len += st->dma_info.slot_len[i];
+                       dwc_memcpy(ptr, &blob->channel[num].index[i].buf[0], st->dma_info.slot_len[i]);
+                       ptr += st->dma_info.slot_len[i];
+               }
+               return len;
+       } else {
+               /* OUT endpoints - nothing to do. */
+               return -1;
+       }
+
+}
+/**
+ * dwc_otg_hcd_handle_hc_fsm() - handle an unmasked channel interrupt
+ *                              from a channel handled in the FIQ
+ * @hcd:       Pointer to dwc_otg_hcd struct
+ * @num:       Host channel number
+ *
+ * If a host channel interrupt was received by the IRQ and this was a channel
+ * used by the FIQ, the execution flow for transfer completion is substantially
+ * different from the normal (messy) path. This function and its friends handles
+ * channel cleanup and transaction completion from a FIQ transaction.
+ */
+void dwc_otg_hcd_handle_hc_fsm(dwc_otg_hcd_t *hcd, uint32_t num)
+{
+       struct fiq_channel_state *st = &hcd->fiq_state->channel[num];
+       dwc_hc_t *hc = hcd->hc_ptr_array[num];
+       dwc_otg_qtd_t *qtd;
+       dwc_otg_hc_regs_t *hc_regs = hcd->core_if->host_if->hc_regs[num];
+       hcint_data_t hcint = hcd->fiq_state->channel[num].hcint_copy;
+       hctsiz_data_t hctsiz = hcd->fiq_state->channel[num].hctsiz_copy;
+       int hostchannels  = 0;
+       fiq_print(FIQDBG_INT, hcd->fiq_state, "OUT %01d %01d ", num , st->fsm);
+
+       hostchannels = hcd->available_host_channels;
+       if (hc->halt_pending) {
+               /* Dequeue: The FIQ was allowed to complete the transfer but state has been cleared. */
+               if (hc->qh && st->fsm == FIQ_NP_SPLIT_DONE &&
+                               hcint.b.xfercomp && hc->qh->ep_type == UE_BULK) {
+                       if (hctsiz.b.pid == DWC_HCTSIZ_DATA0) {
+                               hc->qh->data_toggle = DWC_OTG_HC_PID_DATA1;
+                       } else {
+                               hc->qh->data_toggle = DWC_OTG_HC_PID_DATA0;
+                       }
+               }
+               release_channel(hcd, hc, NULL, hc->halt_status);
+               return;
+       }
+
+       qtd = DWC_CIRCLEQ_FIRST(&hc->qh->qtd_list);
+       switch (st->fsm) {
+       case FIQ_TEST:
+               break;
+
+       case FIQ_DEQUEUE_ISSUED:
+               /* Handled above, but keep for posterity */
+               release_channel(hcd, hc, NULL, hc->halt_status);
+               break;
+
+       case FIQ_NP_SPLIT_DONE:
+               /* Nonperiodic transaction complete. */
+               if (!hc->ep_is_in) {
+                       qtd->ssplit_out_xfer_count = hc->xfer_len;
+               }
+               if (hcint.b.xfercomp) {
+                       handle_hc_xfercomp_intr(hcd, hc, hc_regs, qtd);
+               } else if (hcint.b.nak) {
+                       handle_hc_nak_intr(hcd, hc, hc_regs, qtd);
+               } else {
+                       DWC_WARN("Unexpected IRQ state on FSM transaction:"
+                                       "dev_addr=%d ep=%d fsm=%d, hcint=0x%08x\n",
+                               hc->dev_addr, hc->ep_num, st->fsm, hcint.d32);
+                       release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+               }
+               break;
+
+       case FIQ_NP_SPLIT_HS_ABORTED:
+               /* A HS abort is a 3-strikes on the HS bus at any point in the transaction.
+                * Normally a CLEAR_TT_BUFFER hub command would be required: we can't do that
+                * because there's no guarantee which order a non-periodic split happened in.
+                * We could end up clearing a perfectly good transaction out of the buffer.
+                */
+               if (hcint.b.xacterr) {
+                       qtd->error_count += st->nr_errors;
+                       handle_hc_xacterr_intr(hcd, hc, hc_regs, qtd);
+               } else if (hcint.b.ahberr) {
+                       handle_hc_ahberr_intr(hcd, hc, hc_regs, qtd);
+               } else {
+                       DWC_WARN("Unexpected IRQ state on FSM transaction:"
+                                       "dev_addr=%d ep=%d fsm=%d, hcint=0x%08x\n",
+                               hc->dev_addr, hc->ep_num, st->fsm, hcint.d32);
+                       release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+               }
+               break;
+
+       case FIQ_NP_SPLIT_LS_ABORTED:
+               /* A few cases can cause this - either an unknown state on a SSPLIT or
+                * STALL/data toggle error response on a CSPLIT */
+               if (hcint.b.stall) {
+                       handle_hc_stall_intr(hcd, hc, hc_regs, qtd);
+               } else if (hcint.b.datatglerr) {
+                       handle_hc_datatglerr_intr(hcd, hc, hc_regs, qtd);
+               } else if (hcint.b.bblerr) {
+                       handle_hc_babble_intr(hcd, hc, hc_regs, qtd);
+               } else if (hcint.b.ahberr) {
+                       handle_hc_ahberr_intr(hcd, hc, hc_regs, qtd);
+               } else {
+                       DWC_WARN("Unexpected IRQ state on FSM transaction:"
+                                       "dev_addr=%d ep=%d fsm=%d, hcint=0x%08x\n",
+                               hc->dev_addr, hc->ep_num, st->fsm, hcint.d32);
+                       release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+               }
+               break;
+
+       case FIQ_PER_SPLIT_DONE:
+               /* Isoc IN or Interrupt IN/OUT */
+
+               /* Flow control here is different from the normal execution by the driver.
+               * We need to completely ignore most of the driver's method of handling
+               * split transactions and do it ourselves.
+               */
+               if (hc->ep_type == UE_INTERRUPT) {
+                       if (hcint.b.nak) {
+                                       handle_hc_nak_intr(hcd, hc, hc_regs, qtd);
+                       } else if (hc->ep_is_in) {
+                               int len;
+                               len = dwc_otg_fiq_unsetup_per_dma(hcd, hc->qh, qtd, num);
+                               //printk(KERN_NOTICE "FIQ Transaction: hc=%d len=%d urb_len = %d\n", num, len, qtd->urb->length);
+                               qtd->urb->actual_length += len;
+                               if (qtd->urb->actual_length >= qtd->urb->length) {
+                                       qtd->urb->status = 0;
+                                       hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, qtd->urb->status);
+                                       release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+                               } else {
+                                       /* Interrupt transfer not complete yet - is it a short read? */
+                                       if (len < hc->max_packet) {
+                                               /* Interrupt transaction complete */
+                                               qtd->urb->status = 0;
+                                               hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, qtd->urb->status);
+                                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+                                       } else {
+                                               /* Further transactions required */
+                                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_COMPLETE);
+                                       }
+                               }
+                       } else {
+                               /* Interrupt OUT complete. */
+                               dwc_otg_hcd_save_data_toggle(hc, hc_regs, qtd);
+                               qtd->urb->actual_length += hc->xfer_len;
+                               if (qtd->urb->actual_length >= qtd->urb->length) {
+                                       qtd->urb->status = 0;
+                                       hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, qtd->urb->status);
+                                       release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+                               } else {
+                                       release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_COMPLETE);
+                               }
+                       }
+               } else {
+                       /* ISOC IN complete. */
+                       struct dwc_otg_hcd_iso_packet_desc *frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index];
+                       int len = 0;
+                       /* Record errors, update qtd. */
+                       if (st->nr_errors) {
+                               frame_desc->actual_length = 0;
+                               frame_desc->status = -DWC_E_PROTOCOL;
+                       } else {
+                               frame_desc->status = 0;
+                               /* Unswizzle dma */
+                               len = dwc_otg_fiq_unsetup_per_dma(hcd, hc->qh, qtd, num);
+                               frame_desc->actual_length = len;
+                       }
+                       qtd->isoc_frame_index++;
+                       if (qtd->isoc_frame_index == qtd->urb->packet_count) {
+                               hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, 0);
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+                       } else {
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_COMPLETE);
+                       }
+               }
+               break;
+
+       case FIQ_PER_ISO_OUT_DONE: {
+                       struct dwc_otg_hcd_iso_packet_desc *frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index];
+                       /* Record errors, update qtd. */
+                       if (st->nr_errors) {
+                               frame_desc->actual_length = 0;
+                               frame_desc->status = -DWC_E_PROTOCOL;
+                       } else {
+                               frame_desc->status = 0;
+                               frame_desc->actual_length = frame_desc->length;
+                       }
+                       qtd->isoc_frame_index++;
+                       qtd->isoc_split_offset = 0;
+                       if (qtd->isoc_frame_index == qtd->urb->packet_count) {
+                               hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, 0);
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+                       } else {
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_COMPLETE);
+                       }
+               }
+               break;
+
+       case FIQ_PER_SPLIT_NYET_ABORTED:
+               /* Doh. lost the data. */
+               printk_ratelimited(KERN_INFO "Transfer to device %d endpoint 0x%x frame %d failed "
+                               "- FIQ reported NYET. Data may have been lost.\n",
+                               hc->dev_addr, hc->ep_num, dwc_otg_hcd_get_frame_number(hcd) >> 3);
+               if (hc->ep_type == UE_ISOCHRONOUS) {
+                       struct dwc_otg_hcd_iso_packet_desc *frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index];
+                       /* Record errors, update qtd. */
+                       frame_desc->actual_length = 0;
+                       frame_desc->status = -DWC_E_PROTOCOL;
+                       qtd->isoc_frame_index++;
+                       qtd->isoc_split_offset = 0;
+                       if (qtd->isoc_frame_index == qtd->urb->packet_count) {
+                               hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, 0);
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+                       } else {
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_COMPLETE);
+                       }
+               } else {
+                       release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+               }
+               break;
+
+       case FIQ_HS_ISOC_DONE:
+               /* The FIQ has performed a whole pile of isochronous transactions.
+                * The status is recorded as the interrupt state should the transaction
+                * fail.
+                */
+               dwc_otg_fiq_unmangle_isoc(hcd, hc->qh, qtd, num);
+               hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, 0);
+               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+               break;
+
+       case FIQ_PER_SPLIT_LS_ABORTED:
+               if (hcint.b.xacterr) {
+                       /* Hub has responded with an ERR packet. Device
+                        * has been unplugged or the port has been disabled.
+                        * TODO: need to issue a reset to the hub port. */
+                       qtd->error_count += 3;
+                       handle_hc_xacterr_intr(hcd, hc, hc_regs, qtd);
+               } else if (hcint.b.stall) {
+                       handle_hc_stall_intr(hcd, hc, hc_regs, qtd);
+               } else if (hcint.b.bblerr) {
+                       handle_hc_babble_intr(hcd, hc, hc_regs, qtd);
+               } else {
+                       printk_ratelimited(KERN_INFO "Transfer to device %d endpoint 0x%x failed "
+                               "- FIQ reported FSM=%d. Data may have been lost.\n",
+                               st->fsm, hc->dev_addr, hc->ep_num);
+                       release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+               }
+               break;
+
+       case FIQ_PER_SPLIT_HS_ABORTED:
+               /* Either the SSPLIT phase suffered transaction errors or something
+                * unexpected happened.
+                */
+               qtd->error_count += 3;
+               handle_hc_xacterr_intr(hcd, hc, hc_regs, qtd);
+               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+               break;
+
+       case FIQ_PER_SPLIT_TIMEOUT:
+               /* Couldn't complete in the nominated frame */
+               printk(KERN_INFO "Transfer to device %d endpoint 0x%x frame %d failed "
+                               "- FIQ timed out. Data may have been lost.\n",
+                               hc->dev_addr, hc->ep_num, dwc_otg_hcd_get_frame_number(hcd) >> 3);
+               if (hc->ep_type == UE_ISOCHRONOUS) {
+                       struct dwc_otg_hcd_iso_packet_desc *frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index];
+                       /* Record errors, update qtd. */
+                       frame_desc->actual_length = 0;
+                       if (hc->ep_is_in) {
+                               frame_desc->status = -DWC_E_NO_STREAM_RES;
+                       } else {
+                               frame_desc->status = -DWC_E_COMMUNICATION;
+                       }
+                       qtd->isoc_frame_index++;
+                       if (qtd->isoc_frame_index == qtd->urb->packet_count) {
+                               hcd->fops->complete(hcd, qtd->urb->priv, qtd->urb, 0);
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_URB_COMPLETE);
+                       } else {
+                               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_COMPLETE);
+                       }
+               } else {
+                       release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+               }
+               break;
+
+       default:
+               DWC_WARN("Unexpected state received on hc=%d fsm=%d on transfer to device %d ep 0x%x", 
+                                       hc->hc_num, st->fsm, hc->dev_addr, hc->ep_num);
+               qtd->error_count++;
+               release_channel(hcd, hc, qtd, DWC_OTG_HC_XFER_NO_HALT_STATUS);
+       }
+       return;
+}
+
+/** Handles interrupt for a specific Host Channel */
+int32_t dwc_otg_hcd_handle_hc_n_intr(dwc_otg_hcd_t * dwc_otg_hcd, uint32_t num)
+{
+       int retval = 0;
+       hcint_data_t hcint;
+       hcintmsk_data_t hcintmsk;
+       dwc_hc_t *hc;
+       dwc_otg_hc_regs_t *hc_regs;
+       dwc_otg_qtd_t *qtd;
+
+       DWC_DEBUGPL(DBG_HCDV, "--Host Channel Interrupt--, Channel %d\n", num);
+
+       hc = dwc_otg_hcd->hc_ptr_array[num];
+       hc_regs = dwc_otg_hcd->core_if->host_if->hc_regs[num];
+       if(hc->halt_status == DWC_OTG_HC_XFER_URB_DEQUEUE) {
+               /* A dequeue was issued for this transfer. Our QTD has gone away
+                * but in the case of a FIQ transfer, the transfer would have run
+                * to completion.
+                */
+               if (fiq_fsm_enable && dwc_otg_hcd->fiq_state->channel[num].fsm != FIQ_PASSTHROUGH) {
+                       dwc_otg_hcd_handle_hc_fsm(dwc_otg_hcd, num);
+               } else {
+                       release_channel(dwc_otg_hcd, hc, NULL, hc->halt_status);
+               }
+               return 1;
+       }
+       qtd = DWC_CIRCLEQ_FIRST(&hc->qh->qtd_list);
+
+       /*
+        * FSM mode: Check to see if this is a HC interrupt from a channel handled by the FIQ.
+        * Execution path is fundamentally different for the channels after a FIQ has completed
+        * a split transaction.
+        */
+       if (fiq_fsm_enable) {
+               switch (dwc_otg_hcd->fiq_state->channel[num].fsm) {
+                       case FIQ_PASSTHROUGH:
+                               break;
+                       case FIQ_PASSTHROUGH_ERRORSTATE:
+                               /* Hook into the error count */
+                               fiq_print(FIQDBG_ERR, dwc_otg_hcd->fiq_state, "HCDERR%02d", num);
+                               if (!dwc_otg_hcd->fiq_state->channel[num].nr_errors) {
+                                       qtd->error_count = 0;
+                                       fiq_print(FIQDBG_ERR, dwc_otg_hcd->fiq_state, "RESET   ");
+                               }
+                               break;
+                       default:
+                               dwc_otg_hcd_handle_hc_fsm(dwc_otg_hcd, num);
+                               return 1;
+               }
+       }
+
+       hcint.d32 = DWC_READ_REG32(&hc_regs->hcint);
+       hcintmsk.d32 = DWC_READ_REG32(&hc_regs->hcintmsk);
+       hcint.d32 = hcint.d32 & hcintmsk.d32;
+       if (!dwc_otg_hcd->core_if->dma_enable) {
+               if (hcint.b.chhltd && hcint.d32 != 0x2) {
+                       hcint.b.chhltd = 0;
+               }
+       }
+
+       if (hcint.b.xfercomp) {
+               retval |=
+                   handle_hc_xfercomp_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+               /*
+                * If NYET occurred at same time as Xfer Complete, the NYET is
+                * handled by the Xfer Complete interrupt handler. Don't want
+                * to call the NYET interrupt handler in this case.
+                */
+               hcint.b.nyet = 0;
+       }
+       if (hcint.b.chhltd) {
+               retval |= handle_hc_chhltd_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+       if (hcint.b.ahberr) {
+               retval |= handle_hc_ahberr_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+       if (hcint.b.stall) {
+               retval |= handle_hc_stall_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+       if (hcint.b.nak) {
+               retval |= handle_hc_nak_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+       if (hcint.b.ack) {
+               if(!hcint.b.chhltd)
+                       retval |= handle_hc_ack_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+       if (hcint.b.nyet) {
+               retval |= handle_hc_nyet_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+       if (hcint.b.xacterr) {
+               retval |= handle_hc_xacterr_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+       if (hcint.b.bblerr) {
+               retval |= handle_hc_babble_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+       if (hcint.b.frmovrun) {
+               retval |=
+                   handle_hc_frmovrun_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+       if (hcint.b.datatglerr) {
+               retval |=
+                   handle_hc_datatglerr_intr(dwc_otg_hcd, hc, hc_regs, qtd);
+       }
+
+       return retval;
+}
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
@@ -0,0 +1,1083 @@
+
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_linux.c $
+ * $Revision: #20 $
+ * $Date: 2011/10/26 $
+ * $Change: 1872981 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_DEVICE_ONLY
+
+/**
+ * @file
+ *
+ * This file contains the implementation of the HCD. In Linux, the HCD
+ * implements the hc_driver API.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+#include <linux/dma-mapping.h>
+#include <linux/version.h>
+#include <asm/io.h>
+#ifdef CONFIG_ARM
+#include <asm/fiq.h>
+#endif
+#include <linux/usb.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
+#include <../drivers/usb/core/hcd.h>
+#else
+#include <linux/usb/hcd.h>
+#endif
+#include <asm/bug.h>
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30))
+#define USB_URB_EP_LINKING 1
+#else
+#define USB_URB_EP_LINKING 0
+#endif
+
+#include "dwc_otg_hcd_if.h"
+#include "dwc_otg_dbg.h"
+#include "dwc_otg_driver.h"
+#include "dwc_otg_hcd.h"
+
+#ifndef __virt_to_bus
+#define __virt_to_bus  __virt_to_phys
+#define __bus_to_virt  __phys_to_virt
+#define __pfn_to_bus(x)        __pfn_to_phys(x)
+#define __bus_to_pfn(x)        __phys_to_pfn(x)
+#endif
+
+extern unsigned char  _dwc_otg_fiq_stub, _dwc_otg_fiq_stub_end;
+
+/**
+ * Gets the endpoint number from a _bEndpointAddress argument. The endpoint is
+ * qualified with its direction (possible 32 endpoints per device).
+ */
+#define dwc_ep_addr_to_endpoint(_bEndpointAddress_) ((_bEndpointAddress_ & USB_ENDPOINT_NUMBER_MASK) | \
+                                                    ((_bEndpointAddress_ & USB_DIR_IN) != 0) << 4)
+
+static const char dwc_otg_hcd_name[] = "dwc_otg_hcd";
+
+extern bool fiq_enable;
+
+/** @name Linux HC Driver API Functions */
+/** @{ */
+/* manage i/o requests, device state */
+static int dwc_otg_urb_enqueue(struct usb_hcd *hcd,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+                      struct usb_host_endpoint *ep,
+#endif
+                      struct urb *urb, gfp_t mem_flags);
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+static int dwc_otg_urb_dequeue(struct usb_hcd *hcd, struct urb *urb);
+#endif
+#else /* kernels at or post 2.6.30 */
+static int dwc_otg_urb_dequeue(struct usb_hcd *hcd,
+                               struct urb *urb, int status);
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30) */
+
+static void endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30)
+static void endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep);
+#endif
+static irqreturn_t dwc_otg_hcd_irq(struct usb_hcd *hcd);
+extern int hcd_start(struct usb_hcd *hcd);
+extern void hcd_stop(struct usb_hcd *hcd);
+static int get_frame_number(struct usb_hcd *hcd);
+extern int hub_status_data(struct usb_hcd *hcd, char *buf);
+extern int hub_control(struct usb_hcd *hcd,
+                      u16 typeReq,
+                      u16 wValue, u16 wIndex, char *buf, u16 wLength);
+
+struct wrapper_priv_data {
+       dwc_otg_hcd_t *dwc_otg_hcd;
+};
+
+/** @} */
+
+static struct hc_driver dwc_otg_hc_driver = {
+
+       .description = dwc_otg_hcd_name,
+       .product_desc = "DWC OTG Controller",
+       .hcd_priv_size = sizeof(struct wrapper_priv_data),
+
+       .irq = dwc_otg_hcd_irq,
+
+       .flags = HCD_MEMORY | HCD_USB2,
+
+       //.reset =
+       .start = hcd_start,
+       //.suspend =
+       //.resume =
+       .stop = hcd_stop,
+
+       .urb_enqueue = dwc_otg_urb_enqueue,
+       .urb_dequeue = dwc_otg_urb_dequeue,
+       .endpoint_disable = endpoint_disable,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30)
+       .endpoint_reset = endpoint_reset,
+#endif
+       .get_frame_number = get_frame_number,
+
+       .hub_status_data = hub_status_data,
+       .hub_control = hub_control,
+       //.bus_suspend =
+       //.bus_resume =
+};
+
+/** Gets the dwc_otg_hcd from a struct usb_hcd */
+static inline dwc_otg_hcd_t *hcd_to_dwc_otg_hcd(struct usb_hcd *hcd)
+{
+       struct wrapper_priv_data *p;
+       p = (struct wrapper_priv_data *)(hcd->hcd_priv);
+       return p->dwc_otg_hcd;
+}
+
+/** Gets the struct usb_hcd that contains a dwc_otg_hcd_t. */
+static inline struct usb_hcd *dwc_otg_hcd_to_hcd(dwc_otg_hcd_t * dwc_otg_hcd)
+{
+       return dwc_otg_hcd_get_priv_data(dwc_otg_hcd);
+}
+
+/** Gets the usb_host_endpoint associated with an URB. */
+inline struct usb_host_endpoint *dwc_urb_to_endpoint(struct urb *urb)
+{
+       struct usb_device *dev = urb->dev;
+       int ep_num = usb_pipeendpoint(urb->pipe);
+
+       if (usb_pipein(urb->pipe))
+               return dev->ep_in[ep_num];
+       else
+               return dev->ep_out[ep_num];
+}
+
+static int _disconnect(dwc_otg_hcd_t * hcd)
+{
+       struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd);
+
+       usb_hcd->self.is_b_host = 0;
+       return 0;
+}
+
+static int _start(dwc_otg_hcd_t * hcd)
+{
+       struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd);
+
+       usb_hcd->self.is_b_host = dwc_otg_hcd_is_b_host(hcd);
+       hcd_start(usb_hcd);
+
+       return 0;
+}
+
+static int _hub_info(dwc_otg_hcd_t * hcd, void *urb_handle, uint32_t * hub_addr,
+                    uint32_t * port_addr)
+{
+   struct urb *urb = (struct urb *)urb_handle;
+   struct usb_bus *bus;
+#if 1 //GRAYG - temporary
+   if (NULL == urb_handle)
+      DWC_ERROR("**** %s - NULL URB handle\n", __func__);//GRAYG
+   if (NULL == urb->dev)
+      DWC_ERROR("**** %s - URB has no device\n", __func__);//GRAYG
+   if (NULL == port_addr)
+      DWC_ERROR("**** %s - NULL port_address\n", __func__);//GRAYG
+#endif
+   if (urb->dev->tt) {
+        if (NULL == urb->dev->tt->hub) {
+                DWC_ERROR("**** %s - (URB's transactor has no TT - giving no hub)\n",
+                           __func__); //GRAYG
+                //*hub_addr = (u8)usb_pipedevice(urb->pipe); //GRAYG
+                *hub_addr = 0; //GRAYG
+                // we probably shouldn't have a transaction translator if
+                // there's no associated hub?
+        } else {
+               bus = hcd_to_bus(dwc_otg_hcd_to_hcd(hcd));
+               if (urb->dev->tt->hub == bus->root_hub)
+                       *hub_addr = 0;
+               else
+                       *hub_addr = urb->dev->tt->hub->devnum;
+       }
+       *port_addr = urb->dev->ttport;
+   } else {
+        *hub_addr = 0;
+       *port_addr = urb->dev->ttport;
+   }
+   return 0;
+}
+
+static int _speed(dwc_otg_hcd_t * hcd, void *urb_handle)
+{
+       struct urb *urb = (struct urb *)urb_handle;
+       return urb->dev->speed;
+}
+
+static int _get_b_hnp_enable(dwc_otg_hcd_t * hcd)
+{
+       struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd);
+       return usb_hcd->self.b_hnp_enable;
+}
+
+static void allocate_bus_bandwidth(struct usb_hcd *hcd, uint32_t bw,
+                                  struct urb *urb)
+{
+       hcd_to_bus(hcd)->bandwidth_allocated += bw / urb->interval;
+       if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+               hcd_to_bus(hcd)->bandwidth_isoc_reqs++;
+       } else {
+               hcd_to_bus(hcd)->bandwidth_int_reqs++;
+       }
+}
+
+static void free_bus_bandwidth(struct usb_hcd *hcd, uint32_t bw,
+                              struct urb *urb)
+{
+       hcd_to_bus(hcd)->bandwidth_allocated -= bw / urb->interval;
+       if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+               hcd_to_bus(hcd)->bandwidth_isoc_reqs--;
+       } else {
+               hcd_to_bus(hcd)->bandwidth_int_reqs--;
+       }
+}
+
+/**
+ * Sets the final status of an URB and returns it to the device driver. Any
+ * required cleanup of the URB is performed.  The HCD lock should be held on
+ * entry.
+ */
+static int _complete(dwc_otg_hcd_t * hcd, void *urb_handle,
+                    dwc_otg_hcd_urb_t * dwc_otg_urb, int32_t status)
+{
+       struct urb *urb = (struct urb *)urb_handle;
+       urb_tq_entry_t *new_entry;
+       int rc = 0;
+       if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
+               DWC_PRINTF("%s: urb %p, device %d, ep %d %s, status=%d\n",
+                          __func__, urb, usb_pipedevice(urb->pipe),
+                          usb_pipeendpoint(urb->pipe),
+                          usb_pipein(urb->pipe) ? "IN" : "OUT", status);
+               if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+                       int i;
+                       for (i = 0; i < urb->number_of_packets; i++) {
+                               DWC_PRINTF("  ISO Desc %d status: %d\n",
+                                          i, urb->iso_frame_desc[i].status);
+                       }
+               }
+       }
+       new_entry = DWC_ALLOC_ATOMIC(sizeof(urb_tq_entry_t));
+       urb->actual_length = dwc_otg_hcd_urb_get_actual_length(dwc_otg_urb);
+       /* Convert status value. */
+       switch (status) {
+       case -DWC_E_PROTOCOL:
+               status = -EPROTO;
+               break;
+       case -DWC_E_IN_PROGRESS:
+               status = -EINPROGRESS;
+               break;
+       case -DWC_E_PIPE:
+               status = -EPIPE;
+               break;
+       case -DWC_E_IO:
+               status = -EIO;
+               break;
+       case -DWC_E_TIMEOUT:
+               status = -ETIMEDOUT;
+               break;
+       case -DWC_E_OVERFLOW:
+               status = -EOVERFLOW;
+               break;
+       case -DWC_E_SHUTDOWN:
+               status = -ESHUTDOWN;
+               break;
+       default:
+               if (status) {
+                       DWC_PRINTF("Uknown urb status %d\n", status);
+
+               }
+       }
+
+       if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+               int i;
+
+               urb->error_count = dwc_otg_hcd_urb_get_error_count(dwc_otg_urb);
+               urb->actual_length = 0;
+               for (i = 0; i < urb->number_of_packets; ++i) {
+                       urb->iso_frame_desc[i].actual_length =
+                           dwc_otg_hcd_urb_get_iso_desc_actual_length
+                           (dwc_otg_urb, i);
+                       urb->actual_length += urb->iso_frame_desc[i].actual_length;
+                       urb->iso_frame_desc[i].status =
+                           dwc_otg_hcd_urb_get_iso_desc_status(dwc_otg_urb, i);
+               }
+       }
+
+       urb->status = status;
+       urb->hcpriv = NULL;
+       if (!status) {
+               if ((urb->transfer_flags & URB_SHORT_NOT_OK) &&
+                   (urb->actual_length < urb->transfer_buffer_length)) {
+                       urb->status = -EREMOTEIO;
+               }
+       }
+
+       if ((usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) ||
+           (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
+               struct usb_host_endpoint *ep = dwc_urb_to_endpoint(urb);
+               if (ep) {
+                       free_bus_bandwidth(dwc_otg_hcd_to_hcd(hcd),
+                                          dwc_otg_hcd_get_ep_bandwidth(hcd,
+                                                                       ep->hcpriv),
+                                          urb);
+               }
+       }
+       DWC_FREE(dwc_otg_urb);
+       if (!new_entry) {
+               DWC_ERROR("dwc_otg_hcd: complete: cannot allocate URB TQ entry\n");
+               urb->status = -EPROTO;
+               /* don't schedule the tasklet -
+                * directly return the packet here with error. */
+#if USB_URB_EP_LINKING
+               usb_hcd_unlink_urb_from_ep(dwc_otg_hcd_to_hcd(hcd), urb);
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+               usb_hcd_giveback_urb(dwc_otg_hcd_to_hcd(hcd), urb);
+#else
+               usb_hcd_giveback_urb(dwc_otg_hcd_to_hcd(hcd), urb, urb->status);
+#endif
+       } else {
+               new_entry->urb = urb;
+#if USB_URB_EP_LINKING
+               rc = usb_hcd_check_unlink_urb(dwc_otg_hcd_to_hcd(hcd), urb, urb->status);
+               if(0 == rc) {
+                       usb_hcd_unlink_urb_from_ep(dwc_otg_hcd_to_hcd(hcd), urb);
+               }
+#endif
+               if(0 == rc) {
+                       DWC_TAILQ_INSERT_TAIL(&hcd->completed_urb_list, new_entry,
+                                               urb_tq_entries);
+                       DWC_TASK_HI_SCHEDULE(hcd->completion_tasklet);
+               }
+       }
+       return 0;
+}
+
+static struct dwc_otg_hcd_function_ops hcd_fops = {
+       .start = _start,
+       .disconnect = _disconnect,
+       .hub_info = _hub_info,
+       .speed = _speed,
+       .complete = _complete,
+       .get_b_hnp_enable = _get_b_hnp_enable,
+};
+
+#ifdef CONFIG_ARM64
+
+static int simfiq_irq = -1;
+
+void local_fiq_enable(void)
+{
+       if (simfiq_irq >= 0)
+               enable_irq(simfiq_irq);
+}
+
+void local_fiq_disable(void)
+{
+       if (simfiq_irq >= 0)
+               disable_irq(simfiq_irq);
+}
+
+irqreturn_t fiq_irq_handler(int irq, void *dev_id)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd = (dwc_otg_hcd_t *)dev_id;
+
+       if (fiq_fsm_enable)
+               dwc_otg_fiq_fsm(dwc_otg_hcd->fiq_state, dwc_otg_hcd->core_if->core_params->host_channels);
+       else
+               dwc_otg_fiq_nop(dwc_otg_hcd->fiq_state);
+
+       return IRQ_HANDLED;
+}
+
+#else
+static struct fiq_handler fh = {
+  .name = "usb_fiq",
+};
+
+#endif
+
+static void hcd_init_fiq(void *cookie)
+{
+       dwc_otg_device_t *otg_dev = cookie;
+       dwc_otg_hcd_t *dwc_otg_hcd = otg_dev->hcd;
+#ifdef CONFIG_ARM64
+       int retval = 0;
+       int irq;
+#else
+       struct pt_regs regs;
+       int irq;
+
+       if (claim_fiq(&fh)) {
+               DWC_ERROR("Can't claim FIQ");
+               BUG();
+       }
+       DWC_WARN("FIQ on core %d", smp_processor_id());
+       DWC_WARN("FIQ ASM at %px length %d", &_dwc_otg_fiq_stub, (int)(&_dwc_otg_fiq_stub_end - &_dwc_otg_fiq_stub));
+       set_fiq_handler((void *) &_dwc_otg_fiq_stub, &_dwc_otg_fiq_stub_end - &_dwc_otg_fiq_stub);
+       memset(&regs,0,sizeof(regs));
+
+       regs.ARM_r8 = (long) dwc_otg_hcd->fiq_state;
+       if (fiq_fsm_enable) {
+               regs.ARM_r9 = dwc_otg_hcd->core_if->core_params->host_channels;
+               //regs.ARM_r10 = dwc_otg_hcd->dma;
+               regs.ARM_fp = (long) dwc_otg_fiq_fsm;
+       } else {
+               regs.ARM_fp = (long) dwc_otg_fiq_nop;
+       }
+
+       regs.ARM_sp = (long) dwc_otg_hcd->fiq_stack + (sizeof(struct fiq_stack) - 4);
+
+//             __show_regs(&regs);
+       set_fiq_regs(&regs);
+#endif
+
+       dwc_otg_hcd->fiq_state->dwc_regs_base = otg_dev->os_dep.base;
+       //Set the mphi periph to the required registers
+       dwc_otg_hcd->fiq_state->mphi_regs.base    = otg_dev->os_dep.mphi_base;
+       if (otg_dev->os_dep.use_swirq) {
+               dwc_otg_hcd->fiq_state->mphi_regs.swirq_set =
+                       otg_dev->os_dep.mphi_base + 0x1f0;
+               dwc_otg_hcd->fiq_state->mphi_regs.swirq_clr =
+                       otg_dev->os_dep.mphi_base + 0x1f4;
+               DWC_WARN("Fake MPHI regs_base at 0x%08x",
+                        (int)dwc_otg_hcd->fiq_state->mphi_regs.base);
+       } else {
+               dwc_otg_hcd->fiq_state->mphi_regs.ctrl =
+                       otg_dev->os_dep.mphi_base + 0x4c;
+               dwc_otg_hcd->fiq_state->mphi_regs.outdda
+                       = otg_dev->os_dep.mphi_base + 0x28;
+               dwc_otg_hcd->fiq_state->mphi_regs.outddb
+                       = otg_dev->os_dep.mphi_base + 0x2c;
+               dwc_otg_hcd->fiq_state->mphi_regs.intstat
+                       = otg_dev->os_dep.mphi_base + 0x50;
+               DWC_WARN("MPHI regs_base at %px",
+                        dwc_otg_hcd->fiq_state->mphi_regs.base);
+
+               //Enable mphi peripheral
+               writel((1<<31),dwc_otg_hcd->fiq_state->mphi_regs.ctrl);
+#ifdef DEBUG
+               if (readl(dwc_otg_hcd->fiq_state->mphi_regs.ctrl) & 0x80000000)
+                       DWC_WARN("MPHI periph has been enabled");
+               else
+                       DWC_WARN("MPHI periph has NOT been enabled");
+#endif
+       }
+       // Enable FIQ interrupt from USB peripheral
+#ifdef CONFIG_ARM64
+       irq = otg_dev->os_dep.fiq_num;
+
+       if (irq < 0) {
+               DWC_ERROR("Can't get SIM-FIQ irq");
+               return;
+       }
+
+       retval = request_irq(irq, fiq_irq_handler, 0, "dwc_otg_sim-fiq", dwc_otg_hcd);
+
+       if (retval < 0) {
+               DWC_ERROR("Unable to request SIM-FIQ irq\n");
+               return;
+       }
+
+       simfiq_irq = irq;
+#else
+#ifdef CONFIG_GENERIC_IRQ_MULTI_HANDLER
+       irq = otg_dev->os_dep.fiq_num;
+#else
+       irq = INTERRUPT_VC_USB;
+#endif
+       if (irq < 0) {
+               DWC_ERROR("Can't get FIQ irq");
+               return;
+       }
+       /*
+        * We could take an interrupt immediately after enabling the FIQ.
+        * Ensure coherency of hcd->fiq_state.
+        */
+       smp_mb();
+       enable_fiq(irq);
+       local_fiq_enable();
+#endif
+
+}
+
+/**
+ * Initializes the HCD. This function allocates memory for and initializes the
+ * static parts of the usb_hcd and dwc_otg_hcd structures. It also registers the
+ * USB bus with the core and calls the hc_driver->start() function. It returns
+ * a negative error on failure.
+ */
+int hcd_init(dwc_bus_dev_t *_dev)
+{
+       struct usb_hcd *hcd = NULL;
+       dwc_otg_hcd_t *dwc_otg_hcd = NULL;
+       dwc_otg_device_t *otg_dev = DWC_OTG_BUSDRVDATA(_dev);
+       int retval = 0;
+        u64 dmamask;
+
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD INIT otg_dev=%p\n", otg_dev);
+
+       /* Set device flags indicating whether the HCD supports DMA. */
+       if (dwc_otg_is_dma_enable(otg_dev->core_if))
+                dmamask = DMA_BIT_MASK(32);
+        else
+                dmamask = 0;
+
+#if    defined(LM_INTERFACE) || defined(PLATFORM_INTERFACE)
+        dma_set_mask(&_dev->dev, dmamask);
+        dma_set_coherent_mask(&_dev->dev, dmamask);
+#elif  defined(PCI_INTERFACE)
+        pci_set_dma_mask(_dev, dmamask);
+        pci_set_consistent_dma_mask(_dev, dmamask);
+#endif
+
+       /*
+        * Allocate memory for the base HCD plus the DWC OTG HCD.
+        * Initialize the base HCD.
+        */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
+       hcd = usb_create_hcd(&dwc_otg_hc_driver, &_dev->dev, _dev->dev.bus_id);
+#else
+       hcd = usb_create_hcd(&dwc_otg_hc_driver, &_dev->dev, dev_name(&_dev->dev));
+       hcd->has_tt = 1;
+//      hcd->uses_new_polling = 1;
+//      hcd->poll_rh = 0;
+#endif
+       if (!hcd) {
+               retval = -ENOMEM;
+               goto error1;
+       }
+
+       hcd->regs = otg_dev->os_dep.base;
+
+
+       /* Initialize the DWC OTG HCD. */
+       dwc_otg_hcd = dwc_otg_hcd_alloc_hcd();
+       if (!dwc_otg_hcd) {
+               goto error2;
+       }
+       ((struct wrapper_priv_data *)(hcd->hcd_priv))->dwc_otg_hcd =
+           dwc_otg_hcd;
+       otg_dev->hcd = dwc_otg_hcd;
+       otg_dev->hcd->otg_dev = otg_dev;
+
+#ifdef CONFIG_ARM64
+       if (dwc_otg_hcd_init(dwc_otg_hcd, otg_dev->core_if))
+               goto error2;
+
+       if (fiq_enable)
+               hcd_init_fiq(otg_dev);
+#else
+       if (dwc_otg_hcd_init(dwc_otg_hcd, otg_dev->core_if)) {
+               goto error2;
+       }
+
+       if (fiq_enable) {
+               if (num_online_cpus() > 1) {
+                       /*
+                        * bcm2709: can run the FIQ on a separate core to IRQs.
+                        * Ensure driver state is visible to other cores before setting up the FIQ.
+                        */
+                       smp_mb();
+                       smp_call_function_single(1, hcd_init_fiq, otg_dev, 1);
+               } else {
+                       smp_call_function_single(0, hcd_init_fiq, otg_dev, 1);
+               }
+       }
+#endif
+
+       hcd->self.otg_port = dwc_otg_hcd_otg_port(dwc_otg_hcd);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33) //don't support for LM(with 2.6.20.1 kernel)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35) //version field absent later
+       hcd->self.otg_version = dwc_otg_get_otg_version(otg_dev->core_if);
+#endif
+       /* Don't support SG list at this point */
+       hcd->self.sg_tablesize = 0;
+#endif
+       /*
+        * Finish generic HCD initialization and start the HCD. This function
+        * allocates the DMA buffer pool, registers the USB bus, requests the
+        * IRQ line, and calls hcd_start method.
+        */
+       retval = usb_add_hcd(hcd, otg_dev->os_dep.irq_num, IRQF_SHARED);
+       if (retval < 0) {
+               goto error2;
+       }
+
+       dwc_otg_hcd_set_priv_data(dwc_otg_hcd, hcd);
+       return 0;
+
+error2:
+       usb_put_hcd(hcd);
+error1:
+       return retval;
+}
+
+/**
+ * Removes the HCD.
+ * Frees memory and resources associated with the HCD and deregisters the bus.
+ */
+void hcd_remove(dwc_bus_dev_t *_dev)
+{
+       dwc_otg_device_t *otg_dev = DWC_OTG_BUSDRVDATA(_dev);
+       dwc_otg_hcd_t *dwc_otg_hcd;
+       struct usb_hcd *hcd;
+
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD REMOVE otg_dev=%p\n", otg_dev);
+
+       if (!otg_dev) {
+               DWC_DEBUGPL(DBG_ANY, "%s: otg_dev NULL!\n", __func__);
+               return;
+       }
+
+       dwc_otg_hcd = otg_dev->hcd;
+
+       if (!dwc_otg_hcd) {
+               DWC_DEBUGPL(DBG_ANY, "%s: otg_dev->hcd NULL!\n", __func__);
+               return;
+       }
+
+       hcd = dwc_otg_hcd_to_hcd(dwc_otg_hcd);
+
+       if (!hcd) {
+               DWC_DEBUGPL(DBG_ANY,
+                           "%s: dwc_otg_hcd_to_hcd(dwc_otg_hcd) NULL!\n",
+                           __func__);
+               return;
+       }
+       usb_remove_hcd(hcd);
+       dwc_otg_hcd_set_priv_data(dwc_otg_hcd, NULL);
+       dwc_otg_hcd_remove(dwc_otg_hcd);
+       usb_put_hcd(hcd);
+}
+
+/* =========================================================================
+ *  Linux HC Driver Functions
+ * ========================================================================= */
+
+/** Initializes the DWC_otg controller and its root hub and prepares it for host
+ * mode operation. Activates the root port. Returns 0 on success and a negative
+ * error code on failure. */
+int hcd_start(struct usb_hcd *hcd)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+       struct usb_bus *bus;
+
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD START\n");
+       bus = hcd_to_bus(hcd);
+
+       hcd->state = HC_STATE_RUNNING;
+       if (dwc_otg_hcd_start(dwc_otg_hcd, &hcd_fops)) {
+               return 0;
+       }
+
+       /* Initialize and connect root hub if one is not already attached */
+       if (bus->root_hub) {
+               DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD Has Root Hub\n");
+               /* Inform the HUB driver to resume. */
+               usb_hcd_resume_root_hub(hcd);
+       }
+
+       return 0;
+}
+
+/**
+ * Halts the DWC_otg host mode operations in a clean manner. USB transfers are
+ * stopped.
+ */
+void hcd_stop(struct usb_hcd *hcd)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+
+       dwc_otg_hcd_stop(dwc_otg_hcd);
+}
+
+/** Returns the current frame number. */
+static int get_frame_number(struct usb_hcd *hcd)
+{
+       hprt0_data_t hprt0;
+       dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+       hprt0.d32 = DWC_READ_REG32(dwc_otg_hcd->core_if->host_if->hprt0);
+       if (hprt0.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED)
+               return dwc_otg_hcd_get_frame_number(dwc_otg_hcd) >> 3;
+       else
+               return dwc_otg_hcd_get_frame_number(dwc_otg_hcd);
+}
+
+#ifdef DEBUG
+static void dump_urb_info(struct urb *urb, char *fn_name)
+{
+       DWC_PRINTF("%s, urb %p\n", fn_name, urb);
+       DWC_PRINTF("  Device address: %d\n", usb_pipedevice(urb->pipe));
+       DWC_PRINTF("  Endpoint: %d, %s\n", usb_pipeendpoint(urb->pipe),
+                  (usb_pipein(urb->pipe) ? "IN" : "OUT"));
+       DWC_PRINTF("  Endpoint type: %s\n", ( {
+                                            char *pipetype;
+                                            switch (usb_pipetype(urb->pipe)) {
+case PIPE_CONTROL:
+pipetype = "CONTROL"; break; case PIPE_BULK:
+pipetype = "BULK"; break; case PIPE_INTERRUPT:
+pipetype = "INTERRUPT"; break; case PIPE_ISOCHRONOUS:
+pipetype = "ISOCHRONOUS"; break; default:
+                                            pipetype = "UNKNOWN"; break;};
+                                            pipetype;}
+                  )) ;
+       DWC_PRINTF("  Speed: %s\n", ( {
+                                    char *speed; switch (urb->dev->speed) {
+case USB_SPEED_HIGH:
+speed = "HIGH"; break; case USB_SPEED_FULL:
+speed = "FULL"; break; case USB_SPEED_LOW:
+speed = "LOW"; break; default:
+                                    speed = "UNKNOWN"; break;};
+                                    speed;}
+                  )) ;
+       DWC_PRINTF("  Max packet size: %d\n",
+                  usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)));
+       DWC_PRINTF("  Data buffer length: %d\n", urb->transfer_buffer_length);
+       DWC_PRINTF("  Transfer buffer: %p, Transfer DMA: %p\n",
+                  urb->transfer_buffer, (void *)urb->transfer_dma);
+       DWC_PRINTF("  Setup buffer: %p, Setup DMA: %p\n",
+                  urb->setup_packet, (void *)urb->setup_dma);
+       DWC_PRINTF("  Interval: %d\n", urb->interval);
+       if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+               int i;
+               for (i = 0; i < urb->number_of_packets; i++) {
+                       DWC_PRINTF("  ISO Desc %d:\n", i);
+                       DWC_PRINTF("    offset: %d, length %d\n",
+                                  urb->iso_frame_desc[i].offset,
+                                  urb->iso_frame_desc[i].length);
+               }
+       }
+}
+#endif
+
+/** Starts processing a USB transfer request specified by a USB Request Block
+ * (URB). mem_flags indicates the type of memory allocation to use while
+ * processing this URB. */
+static int dwc_otg_urb_enqueue(struct usb_hcd *hcd,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+                      struct usb_host_endpoint *ep,
+#endif
+                      struct urb *urb, gfp_t mem_flags)
+{
+       int retval = 0;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
+       struct usb_host_endpoint *ep = urb->ep;
+#endif
+       dwc_irqflags_t irqflags;
+        void **ref_ep_hcpriv = &ep->hcpriv;
+       dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+       dwc_otg_hcd_urb_t *dwc_otg_urb;
+       int i;
+       int alloc_bandwidth = 0;
+       uint8_t ep_type = 0;
+       uint32_t flags = 0;
+       void *buf;
+
+#ifdef DEBUG
+       if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
+               dump_urb_info(urb, "dwc_otg_urb_enqueue");
+       }
+#endif
+
+       if (!urb->transfer_buffer && urb->transfer_buffer_length)
+               return -EINVAL;
+
+       if ((usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
+           || (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
+               if (!dwc_otg_hcd_is_bandwidth_allocated
+                   (dwc_otg_hcd, ref_ep_hcpriv)) {
+                       alloc_bandwidth = 1;
+               }
+       }
+
+       switch (usb_pipetype(urb->pipe)) {
+       case PIPE_CONTROL:
+               ep_type = USB_ENDPOINT_XFER_CONTROL;
+               break;
+       case PIPE_ISOCHRONOUS:
+               ep_type = USB_ENDPOINT_XFER_ISOC;
+               break;
+       case PIPE_BULK:
+               ep_type = USB_ENDPOINT_XFER_BULK;
+               break;
+       case PIPE_INTERRUPT:
+               ep_type = USB_ENDPOINT_XFER_INT;
+               break;
+       default:
+                DWC_WARN("Wrong EP type - %d\n", usb_pipetype(urb->pipe));
+       }
+
+        /* # of packets is often 0 - do we really need to call this then? */
+       dwc_otg_urb = dwc_otg_hcd_urb_alloc(dwc_otg_hcd,
+                                           urb->number_of_packets,
+                                           mem_flags == GFP_ATOMIC ? 1 : 0);
+
+       if(dwc_otg_urb == NULL)
+               return -ENOMEM;
+
+       if (!dwc_otg_urb && urb->number_of_packets)
+               return -ENOMEM;
+
+       dwc_otg_hcd_urb_set_pipeinfo(dwc_otg_urb, usb_pipedevice(urb->pipe),
+                                    usb_pipeendpoint(urb->pipe), ep_type,
+                                    usb_pipein(urb->pipe),
+                                    usb_maxpacket(urb->dev, urb->pipe,
+                                                  !(usb_pipein(urb->pipe))));
+
+       buf = urb->transfer_buffer;
+       if (hcd_uses_dma(hcd) && !buf && urb->transfer_buffer_length) {
+               /*
+                * Calculate virtual address from physical address,
+                * because some class driver may not fill transfer_buffer.
+                * In Buffer DMA mode virual address is used,
+                * when handling non DWORD aligned buffers.
+                */
+               buf = (void *)__bus_to_virt((unsigned long)urb->transfer_dma);
+               dev_warn_once(&urb->dev->dev,
+                             "USB transfer_buffer was NULL, will use __bus_to_virt(%pad)=%p\n",
+                             &urb->transfer_dma, buf);
+       }
+
+       if (!(urb->transfer_flags & URB_NO_INTERRUPT))
+               flags |= URB_GIVEBACK_ASAP;
+       if (urb->transfer_flags & URB_ZERO_PACKET)
+               flags |= URB_SEND_ZERO_PACKET;
+
+       dwc_otg_hcd_urb_set_params(dwc_otg_urb, urb, buf,
+                                  urb->transfer_dma,
+                                  urb->transfer_buffer_length,
+                                  urb->setup_packet,
+                                  urb->setup_dma, flags, urb->interval);
+
+       for (i = 0; i < urb->number_of_packets; ++i) {
+               dwc_otg_hcd_urb_set_iso_desc_params(dwc_otg_urb, i,
+                                                   urb->
+                                                   iso_frame_desc[i].offset,
+                                                   urb->
+                                                   iso_frame_desc[i].length);
+       }
+
+       DWC_SPINLOCK_IRQSAVE(dwc_otg_hcd->lock, &irqflags);
+       urb->hcpriv = dwc_otg_urb;
+#if USB_URB_EP_LINKING
+       retval = usb_hcd_link_urb_to_ep(hcd, urb);
+       if (0 == retval)
+#endif
+       {
+               retval = dwc_otg_hcd_urb_enqueue(dwc_otg_hcd, dwc_otg_urb,
+                                               /*(dwc_otg_qh_t **)*/
+                                               ref_ep_hcpriv, 1);
+               if (0 == retval) {
+                       if (alloc_bandwidth) {
+                               allocate_bus_bandwidth(hcd,
+                                               dwc_otg_hcd_get_ep_bandwidth(
+                                                       dwc_otg_hcd, *ref_ep_hcpriv),
+                                               urb);
+                       }
+               } else {
+                       DWC_DEBUGPL(DBG_HCD, "DWC OTG dwc_otg_hcd_urb_enqueue failed rc %d\n", retval);
+#if USB_URB_EP_LINKING
+                       usb_hcd_unlink_urb_from_ep(hcd, urb);
+#endif
+                       DWC_FREE(dwc_otg_urb);
+                       urb->hcpriv = NULL;
+                       if (retval == -DWC_E_NO_DEVICE)
+                               retval = -ENODEV;
+               }
+       }
+#if USB_URB_EP_LINKING
+       else
+       {
+               DWC_FREE(dwc_otg_urb);
+               urb->hcpriv = NULL;
+       }
+#endif
+       DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, irqflags);
+       return retval;
+}
+
+/** Aborts/cancels a USB transfer request. Always returns 0 to indicate
+ * success.  */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+static int dwc_otg_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+#else
+static int dwc_otg_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
+#endif
+{
+       dwc_irqflags_t flags;
+       dwc_otg_hcd_t *dwc_otg_hcd;
+        int rc;
+
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD URB Dequeue\n");
+
+       dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+
+#ifdef DEBUG
+       if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
+               dump_urb_info(urb, "dwc_otg_urb_dequeue");
+       }
+#endif
+
+       DWC_SPINLOCK_IRQSAVE(dwc_otg_hcd->lock, &flags);
+       rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+       if (0 == rc) {
+               if(urb->hcpriv != NULL) {
+                       dwc_otg_hcd_urb_dequeue(dwc_otg_hcd,
+                                           (dwc_otg_hcd_urb_t *)urb->hcpriv);
+
+                       DWC_FREE(urb->hcpriv);
+                       urb->hcpriv = NULL;
+               }
+        }
+
+        if (0 == rc) {
+               /* Higher layer software sets URB status. */
+#if USB_URB_EP_LINKING
+                usb_hcd_unlink_urb_from_ep(hcd, urb);
+#endif
+               DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, flags);
+
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+                usb_hcd_giveback_urb(hcd, urb);
+#else
+                usb_hcd_giveback_urb(hcd, urb, status);
+#endif
+                if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
+                        DWC_PRINTF("Called usb_hcd_giveback_urb() \n");
+                        DWC_PRINTF("  1urb->status = %d\n", urb->status);
+                }
+                DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD URB Dequeue OK\n");
+        } else {
+               DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, flags);
+                DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD URB Dequeue failed - rc %d\n",
+                            rc);
+        }
+
+       return rc;
+}
+
+/* Frees resources in the DWC_otg controller related to a given endpoint. Also
+ * clears state in the HCD related to the endpoint. Any URBs for the endpoint
+ * must already be dequeued. */
+static void endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+
+       DWC_DEBUGPL(DBG_HCD,
+                   "DWC OTG HCD EP DISABLE: _bEndpointAddress=0x%02x, "
+                   "endpoint=%d\n", ep->desc.bEndpointAddress,
+                   dwc_ep_addr_to_endpoint(ep->desc.bEndpointAddress));
+       dwc_otg_hcd_endpoint_disable(dwc_otg_hcd, ep->hcpriv, 250);
+       ep->hcpriv = NULL;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30)
+/* Resets endpoint specific parameter values, in current version used to reset
+ * the data toggle(as a WA). This function can be called from usb_clear_halt routine */
+static void endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
+{
+       dwc_irqflags_t flags;
+       dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD EP RESET: Endpoint Num=0x%02d\n", epnum);
+
+       DWC_SPINLOCK_IRQSAVE(dwc_otg_hcd->lock, &flags);
+       if (ep->hcpriv) {
+               dwc_otg_hcd_endpoint_reset(dwc_otg_hcd, ep->hcpriv);
+       }
+       DWC_SPINUNLOCK_IRQRESTORE(dwc_otg_hcd->lock, flags);
+}
+#endif
+
+/** Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if
+ * there was no interrupt to handle. Returns IRQ_HANDLED if there was a valid
+ * interrupt.
+ *
+ * This function is called by the USB core when an interrupt occurs */
+static irqreturn_t dwc_otg_hcd_irq(struct usb_hcd *hcd)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+       int32_t retval = dwc_otg_hcd_handle_intr(dwc_otg_hcd);
+       if (retval != 0) {
+               S3C2410X_CLEAR_EINTPEND();
+       }
+       return IRQ_RETVAL(retval);
+}
+
+/** Creates Status Change bitmap for the root hub and root port. The bitmap is
+ * returned in buf. Bit 0 is the status change indicator for the root hub. Bit 1
+ * is the status change indicator for the single root port. Returns 1 if either
+ * change indicator is 1, otherwise returns 0. */
+int hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+       dwc_otg_hcd_t *dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+
+       buf[0] = 0;
+       buf[0] |= (dwc_otg_hcd_is_status_changed(dwc_otg_hcd, 1)) << 1;
+
+       return (buf[0] != 0);
+}
+
+/** Handles hub class-specific requests. */
+int hub_control(struct usb_hcd *hcd,
+               u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength)
+{
+       int retval;
+
+       retval = dwc_otg_hcd_hub_control(hcd_to_dwc_otg_hcd(hcd),
+                                        typeReq, wValue, wIndex, buf, wLength);
+
+       switch (retval) {
+       case -DWC_E_INVALID:
+               retval = -EINVAL;
+               break;
+       }
+
+       return retval;
+}
+
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
@@ -0,0 +1,970 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_queue.c $
+ * $Revision: #44 $
+ * $Date: 2011/10/26 $
+ * $Change: 1873028 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_DEVICE_ONLY
+
+/**
+ * @file
+ *
+ * This file contains the functions to manage Queue Heads and Queue
+ * Transfer Descriptors.
+ */
+
+#include "dwc_otg_hcd.h"
+#include "dwc_otg_regs.h"
+
+extern bool microframe_schedule;
+extern unsigned short int_ep_interval_min;
+
+/**
+ * Free each QTD in the QH's QTD-list then free the QH.  QH should already be
+ * removed from a list.  QTD list should already be empty if called from URB
+ * Dequeue.
+ *
+ * @param hcd HCD instance.
+ * @param qh The QH to free.
+ */
+void dwc_otg_hcd_qh_free(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       dwc_otg_qtd_t *qtd, *qtd_tmp;
+       dwc_irqflags_t flags;
+       uint32_t buf_size = 0;
+       uint8_t *align_buf_virt = NULL;
+       dwc_dma_t align_buf_dma;
+       struct device *dev = dwc_otg_hcd_to_dev(hcd);
+
+       /* Free each QTD in the QTD list */
+       DWC_SPINLOCK_IRQSAVE(hcd->lock, &flags);
+       DWC_CIRCLEQ_FOREACH_SAFE(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry) {
+               DWC_CIRCLEQ_REMOVE(&qh->qtd_list, qtd, qtd_list_entry);
+               dwc_otg_hcd_qtd_free(qtd);
+       }
+
+       if (hcd->core_if->dma_desc_enable) {
+               dwc_otg_hcd_qh_free_ddma(hcd, qh);
+       } else if (qh->dw_align_buf) {
+               if (qh->ep_type == UE_ISOCHRONOUS) {
+                       buf_size = 4096;
+               } else {
+                       buf_size = hcd->core_if->core_params->max_transfer_size;
+               }
+               align_buf_virt = qh->dw_align_buf;
+               align_buf_dma = qh->dw_align_buf_dma;
+       }
+
+       DWC_FREE(qh);
+       DWC_SPINUNLOCK_IRQRESTORE(hcd->lock, flags);
+       if (align_buf_virt)
+               DWC_DMA_FREE(dev, buf_size, align_buf_virt, align_buf_dma);
+       return;
+}
+
+#define BitStuffTime(bytecount)  ((8 * 7* bytecount) / 6)
+#define HS_HOST_DELAY          5       /* nanoseconds */
+#define FS_LS_HOST_DELAY       1000    /* nanoseconds */
+#define HUB_LS_SETUP           333     /* nanoseconds */
+#define NS_TO_US(ns)           ((ns + 500) / 1000)
+                               /* convert & round nanoseconds to microseconds */
+
+static uint32_t calc_bus_time(int speed, int is_in, int is_isoc, int bytecount)
+{
+       unsigned long retval;
+
+       switch (speed) {
+       case USB_SPEED_HIGH:
+               if (is_isoc) {
+                       retval =
+                           ((38 * 8 * 2083) +
+                            (2083 * (3 + BitStuffTime(bytecount)))) / 1000 +
+                           HS_HOST_DELAY;
+               } else {
+                       retval =
+                           ((55 * 8 * 2083) +
+                            (2083 * (3 + BitStuffTime(bytecount)))) / 1000 +
+                           HS_HOST_DELAY;
+               }
+               break;
+       case USB_SPEED_FULL:
+               if (is_isoc) {
+                       retval =
+                           (8354 * (31 + 10 * BitStuffTime(bytecount))) / 1000;
+                       if (is_in) {
+                               retval = 7268 + FS_LS_HOST_DELAY + retval;
+                       } else {
+                               retval = 6265 + FS_LS_HOST_DELAY + retval;
+                       }
+               } else {
+                       retval =
+                           (8354 * (31 + 10 * BitStuffTime(bytecount))) / 1000;
+                       retval = 9107 + FS_LS_HOST_DELAY + retval;
+               }
+               break;
+       case USB_SPEED_LOW:
+               if (is_in) {
+                       retval =
+                           (67667 * (31 + 10 * BitStuffTime(bytecount))) /
+                           1000;
+                       retval =
+                           64060 + (2 * HUB_LS_SETUP) + FS_LS_HOST_DELAY +
+                           retval;
+               } else {
+                       retval =
+                           (66700 * (31 + 10 * BitStuffTime(bytecount))) /
+                           1000;
+                       retval =
+                           64107 + (2 * HUB_LS_SETUP) + FS_LS_HOST_DELAY +
+                           retval;
+               }
+               break;
+       default:
+               DWC_WARN("Unknown device speed\n");
+               retval = -1;
+       }
+
+       return NS_TO_US(retval);
+}
+
+/**
+ * Initializes a QH structure.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh  The QH to init.
+ * @param urb Holds the information about the device/endpoint that we need
+ *           to initialize the QH.
+ */
+#define SCHEDULE_SLOP 10
+void qh_init(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh, dwc_otg_hcd_urb_t * urb)
+{
+       char *speed, *type;
+       int dev_speed;
+       uint32_t hub_addr, hub_port;
+       hprt0_data_t hprt;
+
+       dwc_memset(qh, 0, sizeof(dwc_otg_qh_t));
+       hprt.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0);
+
+       /* Initialize QH */
+       qh->ep_type = dwc_otg_hcd_get_pipe_type(&urb->pipe_info);
+       qh->ep_is_in = dwc_otg_hcd_is_pipe_in(&urb->pipe_info) ? 1 : 0;
+
+       qh->data_toggle = DWC_OTG_HC_PID_DATA0;
+       qh->maxp = dwc_otg_hcd_get_mps(&urb->pipe_info);
+       DWC_CIRCLEQ_INIT(&qh->qtd_list);
+       DWC_LIST_INIT(&qh->qh_list_entry);
+       qh->channel = NULL;
+
+       /* FS/LS Enpoint on HS Hub
+        * NOT virtual root hub */
+       dev_speed = hcd->fops->speed(hcd, urb->priv);
+
+       hcd->fops->hub_info(hcd, urb->priv, &hub_addr, &hub_port);
+       qh->do_split = 0;
+       if (microframe_schedule)
+               qh->speed = dev_speed;
+
+       qh->nak_frame = 0xffff;
+
+       if (hprt.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED &&
+                       dev_speed != USB_SPEED_HIGH) {
+               DWC_DEBUGPL(DBG_HCD,
+                           "QH init: EP %d: TT found at hub addr %d, for port %d\n",
+                           dwc_otg_hcd_get_ep_num(&urb->pipe_info), hub_addr,
+                           hub_port);
+               qh->do_split = 1;
+               qh->skip_count = 0;
+       }
+
+       if (qh->ep_type == UE_INTERRUPT || qh->ep_type == UE_ISOCHRONOUS) {
+               /* Compute scheduling parameters once and save them. */
+
+               /** @todo Account for split transfers in the bus time. */
+               int bytecount =
+                   dwc_hb_mult(qh->maxp) * dwc_max_packet(qh->maxp);
+
+               qh->usecs =
+                   calc_bus_time((qh->do_split ? USB_SPEED_HIGH : dev_speed),
+                                 qh->ep_is_in, (qh->ep_type == UE_ISOCHRONOUS),
+                                 bytecount);
+               /* Start in a slightly future (micro)frame. */
+               qh->sched_frame = dwc_frame_num_inc(hcd->frame_number,
+                                                   SCHEDULE_SLOP);
+               qh->interval = urb->interval;
+
+               if (hprt.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED) {
+                       if (dev_speed == USB_SPEED_LOW ||
+                                       dev_speed == USB_SPEED_FULL) {
+                               qh->interval *= 8;
+                               qh->sched_frame |= 0x7;
+                               qh->start_split_frame = qh->sched_frame;
+                       } else if (int_ep_interval_min >= 2 &&
+                                       qh->interval < int_ep_interval_min &&
+                                       qh->ep_type == UE_INTERRUPT) {
+                               qh->interval = int_ep_interval_min;
+                       }
+               }
+       }
+
+       DWC_DEBUGPL(DBG_HCD, "DWC OTG HCD QH Initialized\n");
+       DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH  - qh = %p\n", qh);
+       DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH  - Device Address = %d\n",
+                   dwc_otg_hcd_get_dev_addr(&urb->pipe_info));
+       DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH  - Endpoint %d, %s\n",
+                   dwc_otg_hcd_get_ep_num(&urb->pipe_info),
+                   dwc_otg_hcd_is_pipe_in(&urb->pipe_info) ? "IN" : "OUT");
+       switch (dev_speed) {
+       case USB_SPEED_LOW:
+               qh->dev_speed = DWC_OTG_EP_SPEED_LOW;
+               speed = "low";
+               break;
+       case USB_SPEED_FULL:
+               qh->dev_speed = DWC_OTG_EP_SPEED_FULL;
+               speed = "full";
+               break;
+       case USB_SPEED_HIGH:
+               qh->dev_speed = DWC_OTG_EP_SPEED_HIGH;
+               speed = "high";
+               break;
+       default:
+               speed = "?";
+               break;
+       }
+       DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH  - Speed = %s\n", speed);
+
+       switch (qh->ep_type) {
+       case UE_ISOCHRONOUS:
+               type = "isochronous";
+               break;
+       case UE_INTERRUPT:
+               type = "interrupt";
+               break;
+       case UE_CONTROL:
+               type = "control";
+               break;
+       case UE_BULK:
+               type = "bulk";
+               break;
+       default:
+               type = "?";
+               break;
+       }
+
+       DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH  - Type = %s\n", type);
+
+#ifdef DEBUG
+       if (qh->ep_type == UE_INTERRUPT) {
+               DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH - usecs = %d\n",
+                           qh->usecs);
+               DWC_DEBUGPL(DBG_HCDV, "DWC OTG HCD QH - interval = %d\n",
+                           qh->interval);
+       }
+#endif
+
+}
+
+/**
+ * This function allocates and initializes a QH.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param urb Holds the information about the device/endpoint that we need
+ *           to initialize the QH.
+ * @param atomic_alloc Flag to do atomic allocation if needed
+ *
+ * @return Returns pointer to the newly allocated QH, or NULL on error. */
+dwc_otg_qh_t *dwc_otg_hcd_qh_create(dwc_otg_hcd_t * hcd,
+                                   dwc_otg_hcd_urb_t * urb, int atomic_alloc)
+{
+       dwc_otg_qh_t *qh;
+
+       /* Allocate memory */
+       /** @todo add memflags argument */
+       qh = dwc_otg_hcd_qh_alloc(atomic_alloc);
+       if (qh == NULL) {
+               DWC_ERROR("qh allocation failed");
+               return NULL;
+       }
+
+       qh_init(hcd, qh, urb);
+
+       if (hcd->core_if->dma_desc_enable
+           && (dwc_otg_hcd_qh_init_ddma(hcd, qh) < 0)) {
+               dwc_otg_hcd_qh_free(hcd, qh);
+               return NULL;
+       }
+
+       return qh;
+}
+
+/* microframe_schedule=0 start */
+
+/**
+ * Checks that a channel is available for a periodic transfer.
+ *
+ * @return 0 if successful, negative error code otherise.
+ */
+static int periodic_channel_available(dwc_otg_hcd_t * hcd)
+{
+       /*
+        * Currently assuming that there is a dedicated host channnel for each
+        * periodic transaction plus at least one host channel for
+        * non-periodic transactions.
+        */
+       int status;
+       int num_channels;
+
+       num_channels = hcd->core_if->core_params->host_channels;
+       if ((hcd->periodic_channels + hcd->non_periodic_channels < num_channels)
+           && (hcd->periodic_channels < num_channels - 1)) {
+               status = 0;
+       } else {
+               DWC_INFO("%s: Total channels: %d, Periodic: %d, Non-periodic: %d\n",
+                       __func__, num_channels, hcd->periodic_channels, hcd->non_periodic_channels);    //NOTICE
+               status = -DWC_E_NO_SPACE;
+       }
+
+       return status;
+}
+
+/**
+ * Checks that there is sufficient bandwidth for the specified QH in the
+ * periodic schedule. For simplicity, this calculation assumes that all the
+ * transfers in the periodic schedule may occur in the same (micro)frame.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh QH containing periodic bandwidth required.
+ *
+ * @return 0 if successful, negative error code otherwise.
+ */
+static int check_periodic_bandwidth(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       int status;
+       int16_t max_claimed_usecs;
+
+       status = 0;
+
+       if ((qh->dev_speed == DWC_OTG_EP_SPEED_HIGH) || qh->do_split) {
+               /*
+                * High speed mode.
+                * Max periodic usecs is 80% x 125 usec = 100 usec.
+                */
+
+               max_claimed_usecs = 100 - qh->usecs;
+       } else {
+               /*
+                * Full speed mode.
+                * Max periodic usecs is 90% x 1000 usec = 900 usec.
+                */
+               max_claimed_usecs = 900 - qh->usecs;
+       }
+
+       if (hcd->periodic_usecs > max_claimed_usecs) {
+               DWC_INFO("%s: already claimed usecs %d, required usecs %d\n", __func__, hcd->periodic_usecs, qh->usecs);        //NOTICE
+               status = -DWC_E_NO_SPACE;
+       }
+
+       return status;
+}
+
+/* microframe_schedule=0 end */
+
+/**
+ * Microframe scheduler
+ * track the total use in hcd->frame_usecs
+ * keep each qh use in qh->frame_usecs
+ * when surrendering the qh then donate the time back
+ */
+const unsigned short max_uframe_usecs[]={ 100, 100, 100, 100, 100, 100, 30, 0 };
+
+/*
+ * called from dwc_otg_hcd.c:dwc_otg_hcd_init
+ */
+void init_hcd_usecs(dwc_otg_hcd_t *_hcd)
+{
+       int i;
+       if (_hcd->flags.b.port_speed == DWC_HPRT0_PRTSPD_FULL_SPEED) {
+               _hcd->frame_usecs[0] = 900;
+               for (i = 1; i < 8; i++)
+                       _hcd->frame_usecs[i] = 0;
+       } else {
+               for (i = 0; i < 8; i++)
+                       _hcd->frame_usecs[i] = max_uframe_usecs[i];
+       }
+}
+
+static int find_single_uframe(dwc_otg_hcd_t * _hcd, dwc_otg_qh_t * _qh)
+{
+       int i;
+       unsigned short utime;
+       int t_left;
+       int ret;
+       int done;
+
+       ret = -1;
+       utime = _qh->usecs;
+       t_left = utime;
+       i = 0;
+       done = 0;
+       while (done == 0) {
+               /* At the start _hcd->frame_usecs[i] = max_uframe_usecs[i]; */
+               if (utime <= _hcd->frame_usecs[i]) {
+                       _hcd->frame_usecs[i] -= utime;
+                       _qh->frame_usecs[i] += utime;
+                       t_left -= utime;
+                       ret = i;
+                       done = 1;
+                       return ret;
+               } else {
+                       i++;
+                       if (i == 8) {
+                               done = 1;
+                               ret = -1;
+                       }
+               }
+       }
+       return ret;
+ }
+
+/*
+ * use this for FS apps that can span multiple uframes
+  */
+static int find_multi_uframe(dwc_otg_hcd_t * _hcd, dwc_otg_qh_t * _qh)
+{
+       int i;
+       int j;
+       unsigned short utime;
+       int t_left;
+       int ret;
+       int done;
+       unsigned short xtime;
+
+       ret = -1;
+       utime = _qh->usecs;
+       t_left = utime;
+       i = 0;
+       done = 0;
+loop:
+       while (done == 0) {
+               if(_hcd->frame_usecs[i] <= 0) {
+                       i++;
+                       if (i == 8) {
+                               done = 1;
+                               ret = -1;
+                       }
+                       goto loop;
+               }
+
+               /*
+                * we need n consecutive slots
+                * so use j as a start slot j plus j+1 must be enough time (for now)
+                */
+               xtime= _hcd->frame_usecs[i];
+               for (j = i+1 ; j < 8 ; j++ ) {
+                       /*
+                        * if we add this frame remaining time to xtime we may
+                        * be OK, if not we need to test j for a complete frame
+                        */
+                       if ((xtime+_hcd->frame_usecs[j]) < utime) {
+                               if (_hcd->frame_usecs[j] < max_uframe_usecs[j]) {
+                                       j = 8;
+                                       ret = -1;
+                                       continue;
+                               }
+                       }
+                       if (xtime >= utime) {
+                               ret = i;
+                               j = 8;  /* stop loop with a good value ret */
+                               continue;
+                       }
+                       /* add the frame time to x time */
+                       xtime += _hcd->frame_usecs[j];
+                      /* we must have a fully available next frame or break */
+                      if ((xtime < utime)
+                                      && (_hcd->frame_usecs[j] == max_uframe_usecs[j])) {
+                              ret = -1;
+                              j = 8;  /* stop loop with a bad value ret */
+                              continue;
+                      }
+               }
+               if (ret >= 0) {
+                       t_left = utime;
+                       for (j = i; (t_left>0) && (j < 8); j++ ) {
+                               t_left -= _hcd->frame_usecs[j];
+                               if ( t_left <= 0 ) {
+                                       _qh->frame_usecs[j] += _hcd->frame_usecs[j] + t_left;
+                                       _hcd->frame_usecs[j]= -t_left;
+                                       ret = i;
+                                       done = 1;
+                               } else {
+                                       _qh->frame_usecs[j] += _hcd->frame_usecs[j];
+                                       _hcd->frame_usecs[j] = 0;
+                               }
+                       }
+               } else {
+                       i++;
+                       if (i == 8) {
+                               done = 1;
+                               ret = -1;
+                       }
+               }
+       }
+       return ret;
+}
+
+static int find_uframe(dwc_otg_hcd_t * _hcd, dwc_otg_qh_t * _qh)
+{
+       int ret;
+       ret = -1;
+
+       if (_qh->speed == USB_SPEED_HIGH ||
+               _hcd->flags.b.port_speed == DWC_HPRT0_PRTSPD_FULL_SPEED) {
+               /* if this is a hs transaction we need a full frame - or account for FS usecs */
+               ret = find_single_uframe(_hcd, _qh);
+       } else {
+               /* if this is a fs transaction we may need a sequence of frames */
+               ret = find_multi_uframe(_hcd, _qh);
+       }
+       return ret;
+}
+
+/**
+ * Checks that the max transfer size allowed in a host channel is large enough
+ * to handle the maximum data transfer in a single (micro)frame for a periodic
+ * transfer.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh QH for a periodic endpoint.
+ *
+ * @return 0 if successful, negative error code otherwise.
+ */
+static int check_max_xfer_size(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       int status;
+       uint32_t max_xfer_size;
+       uint32_t max_channel_xfer_size;
+
+       status = 0;
+
+       max_xfer_size = dwc_max_packet(qh->maxp) * dwc_hb_mult(qh->maxp);
+       max_channel_xfer_size = hcd->core_if->core_params->max_transfer_size;
+
+       if (max_xfer_size > max_channel_xfer_size) {
+               DWC_INFO("%s: Periodic xfer length %d > " "max xfer length for channel %d\n",
+                               __func__, max_xfer_size, max_channel_xfer_size);        //NOTICE
+               status = -DWC_E_NO_SPACE;
+       }
+
+       return status;
+}
+
+
+
+/**
+ * Schedules an interrupt or isochronous transfer in the periodic schedule.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh QH for the periodic transfer. The QH should already contain the
+ * scheduling information.
+ *
+ * @return 0 if successful, negative error code otherwise.
+ */
+static int schedule_periodic(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       int status = 0;
+
+       if (microframe_schedule) {
+               int frame;
+               status = find_uframe(hcd, qh);
+               frame = -1;
+               if (status == 0) {
+                       frame = 7;
+               } else {
+                       if (status > 0 )
+                               frame = status-1;
+               }
+
+               /* Set the new frame up */
+               if (frame > -1) {
+                       qh->sched_frame &= ~0x7;
+                       qh->sched_frame |= (frame & 7);
+               }
+
+               if (status != -1)
+                       status = 0;
+       } else {
+               status = periodic_channel_available(hcd);
+               if (status) {
+                       DWC_INFO("%s: No host channel available for periodic " "transfer.\n", __func__);        //NOTICE
+                       return status;
+               }
+
+               status = check_periodic_bandwidth(hcd, qh);
+       }
+       if (status) {
+               DWC_INFO("%s: Insufficient periodic bandwidth for "
+                           "periodic transfer.\n", __func__);
+               return -DWC_E_NO_SPACE;
+       }
+       status = check_max_xfer_size(hcd, qh);
+       if (status) {
+               DWC_INFO("%s: Channel max transfer size too small "
+                           "for periodic transfer.\n", __func__);
+               return status;
+       }
+
+       if (hcd->core_if->dma_desc_enable) {
+               /* Don't rely on SOF and start in ready schedule */
+               DWC_LIST_INSERT_TAIL(&hcd->periodic_sched_ready, &qh->qh_list_entry);
+       }
+       else {
+               if(fiq_enable && (DWC_LIST_EMPTY(&hcd->periodic_sched_inactive) || dwc_frame_num_le(qh->sched_frame, hcd->fiq_state->next_sched_frame)))
+               {
+                       hcd->fiq_state->next_sched_frame = qh->sched_frame;
+
+               }
+               /* Always start in the inactive schedule. */
+               DWC_LIST_INSERT_TAIL(&hcd->periodic_sched_inactive, &qh->qh_list_entry);
+       }
+
+       if (!microframe_schedule) {
+               /* Reserve the periodic channel. */
+               hcd->periodic_channels++;
+       }
+
+       /* Update claimed usecs per (micro)frame. */
+       hcd->periodic_usecs += qh->usecs;
+
+       return status;
+}
+
+
+/**
+ * This function adds a QH to either the non periodic or periodic schedule if
+ * it is not already in the schedule. If the QH is already in the schedule, no
+ * action is taken.
+ *
+ * @return 0 if successful, negative error code otherwise.
+ */
+int dwc_otg_hcd_qh_add(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       int status = 0;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       if (!DWC_LIST_EMPTY(&qh->qh_list_entry)) {
+               /* QH already in a schedule. */
+               return status;
+       }
+
+       /* Add the new QH to the appropriate schedule */
+       if (dwc_qh_is_non_per(qh)) {
+               /* Always start in the inactive schedule. */
+               DWC_LIST_INSERT_TAIL(&hcd->non_periodic_sched_inactive,
+                                    &qh->qh_list_entry);
+               //hcd->fiq_state->kick_np_queues = 1;
+       } else {
+               status = schedule_periodic(hcd, qh);
+               if ( !hcd->periodic_qh_count ) {
+                       intr_mask.b.sofintr = 1;
+                       if (fiq_enable) {
+                               local_fiq_disable();
+                               fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+                               DWC_MODIFY_REG32(&hcd->core_if->core_global_regs->gintmsk, intr_mask.d32, intr_mask.d32);
+                               fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+                               local_fiq_enable();
+                       } else {
+                               DWC_MODIFY_REG32(&hcd->core_if->core_global_regs->gintmsk, intr_mask.d32, intr_mask.d32);
+                       }
+               }
+               hcd->periodic_qh_count++;
+       }
+
+       return status;
+}
+
+/**
+ * Removes an interrupt or isochronous transfer from the periodic schedule.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh QH for the periodic transfer.
+ */
+static void deschedule_periodic(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       int i;
+       DWC_LIST_REMOVE_INIT(&qh->qh_list_entry);
+
+       /* Update claimed usecs per (micro)frame. */
+       hcd->periodic_usecs -= qh->usecs;
+
+       if (!microframe_schedule) {
+               /* Release the periodic channel reservation. */
+               hcd->periodic_channels--;
+       } else {
+               for (i = 0; i < 8; i++) {
+                       hcd->frame_usecs[i] += qh->frame_usecs[i];
+                       qh->frame_usecs[i] = 0;
+               }
+       }
+}
+
+/**
+ * Removes a QH from either the non-periodic or periodic schedule.  Memory is
+ * not freed.
+ *
+ * @param hcd The HCD state structure.
+ * @param qh QH to remove from schedule. */
+void dwc_otg_hcd_qh_remove(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh)
+{
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       if (DWC_LIST_EMPTY(&qh->qh_list_entry)) {
+               /* QH is not in a schedule. */
+               return;
+       }
+
+       if (dwc_qh_is_non_per(qh)) {
+               if (hcd->non_periodic_qh_ptr == &qh->qh_list_entry) {
+                       hcd->non_periodic_qh_ptr =
+                           hcd->non_periodic_qh_ptr->next;
+               }
+               DWC_LIST_REMOVE_INIT(&qh->qh_list_entry);
+               //if (!DWC_LIST_EMPTY(&hcd->non_periodic_sched_inactive))
+               //      hcd->fiq_state->kick_np_queues = 1;
+       } else {
+               deschedule_periodic(hcd, qh);
+               hcd->periodic_qh_count--;
+               if( !hcd->periodic_qh_count && !fiq_fsm_enable ) {
+                       intr_mask.b.sofintr = 1;
+                       if (fiq_enable) {
+                               local_fiq_disable();
+                               fiq_fsm_spin_lock(&hcd->fiq_state->lock);
+                               DWC_MODIFY_REG32(&hcd->core_if->core_global_regs->gintmsk, intr_mask.d32, 0);
+                               fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
+                               local_fiq_enable();
+                       } else {
+                               DWC_MODIFY_REG32(&hcd->core_if->core_global_regs->gintmsk, intr_mask.d32, 0);
+                       }
+               }
+       }
+}
+
+/**
+ * Deactivates a QH. For non-periodic QHs, removes the QH from the active
+ * non-periodic schedule. The QH is added to the inactive non-periodic
+ * schedule if any QTDs are still attached to the QH.
+ *
+ * For periodic QHs, the QH is removed from the periodic queued schedule. If
+ * there are any QTDs still attached to the QH, the QH is added to either the
+ * periodic inactive schedule or the periodic ready schedule and its next
+ * scheduled frame is calculated. The QH is placed in the ready schedule if
+ * the scheduled frame has been reached already. Otherwise it's placed in the
+ * inactive schedule. If there are no QTDs attached to the QH, the QH is
+ * completely removed from the periodic schedule.
+ */
+void dwc_otg_hcd_qh_deactivate(dwc_otg_hcd_t * hcd, dwc_otg_qh_t * qh,
+                              int sched_next_periodic_split)
+{
+       if (dwc_qh_is_non_per(qh)) {
+               dwc_otg_hcd_qh_remove(hcd, qh);
+               if (!DWC_CIRCLEQ_EMPTY(&qh->qtd_list)) {
+                       /* Add back to inactive non-periodic schedule. */
+                       dwc_otg_hcd_qh_add(hcd, qh);
+                       //hcd->fiq_state->kick_np_queues = 1;
+               } else {
+                       if(nak_holdoff && qh->do_split) {
+                               qh->nak_frame = 0xFFFF;
+                       }
+               }
+       } else {
+               uint16_t frame_number = dwc_otg_hcd_get_frame_number(hcd);
+
+               if (qh->do_split) {
+                       /* Schedule the next continuing periodic split transfer */
+                       if (sched_next_periodic_split) {
+
+                               qh->sched_frame = frame_number;
+
+                               if (dwc_frame_num_le(frame_number,
+                                                    dwc_frame_num_inc
+                                                    (qh->start_split_frame,
+                                                     1))) {
+                                       /*
+                                        * Allow one frame to elapse after start
+                                        * split microframe before scheduling
+                                        * complete split, but DONT if we are
+                                        * doing the next start split in the
+                                        * same frame for an ISOC out.
+                                        */
+                                       if ((qh->ep_type != UE_ISOCHRONOUS) ||
+                                           (qh->ep_is_in != 0)) {
+                                               qh->sched_frame =
+                                                   dwc_frame_num_inc(qh->sched_frame, 1);
+                                       }
+                               }
+                       } else {
+                               qh->sched_frame =
+                                   dwc_frame_num_inc(qh->start_split_frame,
+                                                     qh->interval);
+                               if (dwc_frame_num_le
+                                   (qh->sched_frame, frame_number)) {
+                                       qh->sched_frame = frame_number;
+                               }
+                               qh->sched_frame |= 0x7;
+                               qh->start_split_frame = qh->sched_frame;
+                       }
+               } else {
+                       qh->sched_frame =
+                           dwc_frame_num_inc(qh->sched_frame, qh->interval);
+                       if (dwc_frame_num_le(qh->sched_frame, frame_number)) {
+                               qh->sched_frame = frame_number;
+                       }
+               }
+
+               if (DWC_CIRCLEQ_EMPTY(&qh->qtd_list)) {
+                       dwc_otg_hcd_qh_remove(hcd, qh);
+               } else {
+                       /*
+                        * Remove from periodic_sched_queued and move to
+                        * appropriate queue.
+                        */
+                       if ((microframe_schedule && dwc_frame_num_le(qh->sched_frame, frame_number)) ||
+                       (!microframe_schedule && qh->sched_frame == frame_number)) {
+                               DWC_LIST_MOVE_HEAD(&hcd->periodic_sched_ready,
+                                                  &qh->qh_list_entry);
+                       } else {
+                               if(fiq_enable && !dwc_frame_num_le(hcd->fiq_state->next_sched_frame, qh->sched_frame))
+                               {
+                                       hcd->fiq_state->next_sched_frame = qh->sched_frame;
+                               }
+
+                               DWC_LIST_MOVE_HEAD
+                                   (&hcd->periodic_sched_inactive,
+                                    &qh->qh_list_entry);
+                       }
+               }
+       }
+}
+
+/**
+ * This function allocates and initializes a QTD.
+ *
+ * @param urb The URB to create a QTD from.  Each URB-QTD pair will end up
+ *           pointing to each other so each pair should have a unique correlation.
+ * @param atomic_alloc Flag to do atomic alloc if needed
+ *
+ * @return Returns pointer to the newly allocated QTD, or NULL on error. */
+dwc_otg_qtd_t *dwc_otg_hcd_qtd_create(dwc_otg_hcd_urb_t * urb, int atomic_alloc)
+{
+       dwc_otg_qtd_t *qtd;
+
+       qtd = dwc_otg_hcd_qtd_alloc(atomic_alloc);
+       if (qtd == NULL) {
+               return NULL;
+       }
+
+       dwc_otg_hcd_qtd_init(qtd, urb);
+       return qtd;
+}
+
+/**
+ * Initializes a QTD structure.
+ *
+ * @param qtd The QTD to initialize.
+ * @param urb The URB to use for initialization.  */
+void dwc_otg_hcd_qtd_init(dwc_otg_qtd_t * qtd, dwc_otg_hcd_urb_t * urb)
+{
+       dwc_memset(qtd, 0, sizeof(dwc_otg_qtd_t));
+       qtd->urb = urb;
+       if (dwc_otg_hcd_get_pipe_type(&urb->pipe_info) == UE_CONTROL) {
+               /*
+                * The only time the QTD data toggle is used is on the data
+                * phase of control transfers. This phase always starts with
+                * DATA1.
+                */
+               qtd->data_toggle = DWC_OTG_HC_PID_DATA1;
+               qtd->control_phase = DWC_OTG_CONTROL_SETUP;
+       }
+
+       /* start split */
+       qtd->complete_split = 0;
+       qtd->isoc_split_pos = DWC_HCSPLIT_XACTPOS_ALL;
+       qtd->isoc_split_offset = 0;
+       qtd->in_process = 0;
+
+       /* Store the qtd ptr in the urb to reference what QTD. */
+       urb->qtd = qtd;
+       return;
+}
+
+/**
+ * This function adds a QTD to the QTD-list of a QH.  It will find the correct
+ * QH to place the QTD into.  If it does not find a QH, then it will create a
+ * new QH. If the QH to which the QTD is added is not currently scheduled, it
+ * is placed into the proper schedule based on its EP type.
+ * HCD lock must be held and interrupts must be disabled on entry
+ *
+ * @param[in] qtd The QTD to add
+ * @param[in] hcd The DWC HCD structure
+ * @param[out] qh out parameter to return queue head
+ * @param atomic_alloc Flag to do atomic alloc if needed
+ *
+ * @return 0 if successful, negative error code otherwise.
+ */
+int dwc_otg_hcd_qtd_add(dwc_otg_qtd_t * qtd,
+                       dwc_otg_hcd_t * hcd, dwc_otg_qh_t ** qh, int atomic_alloc)
+{
+       int retval = 0;
+       dwc_otg_hcd_urb_t *urb = qtd->urb;
+
+       /*
+        * Get the QH which holds the QTD-list to insert to. Create QH if it
+        * doesn't exist.
+        */
+       if (*qh == NULL) {
+               *qh = dwc_otg_hcd_qh_create(hcd, urb, atomic_alloc);
+               if (*qh == NULL) {
+                       retval = -DWC_E_NO_MEMORY;
+                       goto done;
+               } else {
+                       if (fiq_enable)
+                               hcd->fiq_state->kick_np_queues = 1;
+               }
+       }
+       retval = dwc_otg_hcd_qh_add(hcd, *qh);
+       if (retval == 0) {
+               DWC_CIRCLEQ_INSERT_TAIL(&((*qh)->qtd_list), qtd,
+                                       qtd_list_entry);
+               qtd->qh = *qh;
+       }
+done:
+
+       return retval;
+}
+
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h
@@ -0,0 +1,199 @@
+#ifndef _DWC_OS_DEP_H_
+#define _DWC_OS_DEP_H_
+
+/**
+ * @file
+ *
+ * This file contains OS dependent structures.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/dma-mapping.h>
+#include <linux/jiffies.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+#include <linux/stat.h>
+#include <linux/pci.h>
+
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+# include <linux/irq.h>
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
+# include <linux/usb/ch9.h>
+#else
+# include <linux/usb_ch9.h>
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
+# include <linux/usb/gadget.h>
+#else
+# include <linux/usb_gadget.h>
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
+# include <asm/irq.h>
+#endif
+
+#ifdef PCI_INTERFACE
+# include <asm/io.h>
+#endif
+
+#ifdef LM_INTERFACE
+# include <asm/unaligned.h>
+# include <asm/sizes.h>
+# include <asm/param.h>
+# include <asm/io.h>
+# if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30))
+#  include <asm/arch/hardware.h>
+#  include <asm/arch/lm.h>
+#  include <asm/arch/irqs.h>
+#  include <asm/arch/regs-irq.h>
+# else
+/* in 2.6.31, at least, we seem to have lost the generic LM infrastructure -
+   here we assume that the machine architecture provides definitions
+   in its own header
+*/
+#  include <mach/lm.h>
+#  include <mach/hardware.h>
+# endif
+#endif
+
+#ifdef PLATFORM_INTERFACE
+#include <linux/platform_device.h>
+#ifdef CONFIG_ARM
+#include <asm/mach/map.h>
+#endif
+#endif
+
+/** The OS page size */
+#define DWC_OS_PAGE_SIZE       PAGE_SIZE
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14)
+typedef int gfp_t;
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
+# define IRQF_SHARED SA_SHIRQ
+#endif
+
+typedef struct os_dependent {
+       /** Base address returned from ioremap() */
+       void *base;
+
+       /** Register offset for Diagnostic API */
+       uint32_t reg_offset;
+
+       /** Base address for MPHI peripheral */
+       void *mphi_base;
+
+       /** mphi_base actually points to the SWIRQ block */
+       bool use_swirq;
+
+       /** IRQ number (<0 if not valid) */
+       int irq_num;
+
+       /** FIQ number (<0 if not valid) */
+       int fiq_num;
+
+#ifdef LM_INTERFACE
+       struct lm_device *lmdev;
+#elif  defined(PCI_INTERFACE)
+       struct pci_dev *pcidev;
+
+       /** Start address of a PCI region */
+       resource_size_t rsrc_start;
+
+       /** Length address of a PCI region */
+       resource_size_t rsrc_len;
+#elif  defined(PLATFORM_INTERFACE)
+       struct platform_device *platformdev;
+#endif
+
+} os_dependent_t;
+
+#ifdef __cplusplus
+}
+#endif
+
+
+
+/* Type for the our device on the chosen bus */
+#if   defined(LM_INTERFACE)
+typedef struct lm_device       dwc_bus_dev_t;
+#elif defined(PCI_INTERFACE)
+typedef struct pci_dev         dwc_bus_dev_t;
+#elif defined(PLATFORM_INTERFACE)
+typedef struct platform_device dwc_bus_dev_t;
+#endif
+
+/* Helper macro to retrieve drvdata from the device on the chosen bus */
+#if    defined(LM_INTERFACE)
+#define DWC_OTG_BUSDRVDATA(_dev) lm_get_drvdata(_dev)
+#elif  defined(PCI_INTERFACE)
+#define DWC_OTG_BUSDRVDATA(_dev) pci_get_drvdata(_dev)
+#elif  defined(PLATFORM_INTERFACE)
+#define DWC_OTG_BUSDRVDATA(_dev) platform_get_drvdata(_dev)
+#endif
+
+/**
+ * Helper macro returning the otg_device structure of a given struct device
+ *
+ * c.f. static dwc_otg_device_t *dwc_otg_drvdev(struct device *_dev)
+ */
+#ifdef LM_INTERFACE
+#define DWC_OTG_GETDRVDEV(_var, _dev) do { \
+                struct lm_device *lm_dev = \
+                        container_of(_dev, struct lm_device, dev); \
+                _var = lm_get_drvdata(lm_dev); \
+        } while (0)
+
+#elif defined(PCI_INTERFACE)
+#define DWC_OTG_GETDRVDEV(_var, _dev) do { \
+                _var = dev_get_drvdata(_dev); \
+        } while (0)
+
+#elif defined(PLATFORM_INTERFACE)
+#define DWC_OTG_GETDRVDEV(_var, _dev) do { \
+                struct platform_device *platform_dev = \
+                        container_of(_dev, struct platform_device, dev); \
+                _var = platform_get_drvdata(platform_dev); \
+        } while (0)
+#endif
+
+
+/**
+ * Helper macro returning the struct dev of the given struct os_dependent
+ *
+ * c.f. static struct device *dwc_otg_getdev(struct os_dependent *osdep)
+ */
+#ifdef LM_INTERFACE
+#define DWC_OTG_OS_GETDEV(_osdep) \
+        ((_osdep).lmdev == NULL? NULL: &(_osdep).lmdev->dev)
+#elif defined(PCI_INTERFACE)
+#define DWC_OTG_OS_GETDEV(_osdep) \
+        ((_osdep).pci_dev == NULL? NULL: &(_osdep).pci_dev->dev)
+#elif defined(PLATFORM_INTERFACE)
+#define DWC_OTG_OS_GETDEV(_osdep) \
+        ((_osdep).platformdev == NULL? NULL: &(_osdep).platformdev->dev)
+#endif
+
+
+
+
+#endif /* _DWC_OS_DEP_H_ */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_pcd.c
@@ -0,0 +1,2725 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_pcd.c $
+ * $Revision: #101 $
+ * $Date: 2012/08/10 $
+ * $Change: 2047372 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_HOST_ONLY
+
+/** @file
+ * This file implements PCD Core. All code in this file is portable and doesn't
+ * use any OS specific functions.
+ * PCD Core provides Interface, defined in <code><dwc_otg_pcd_if.h></code>
+ * header file, which can be used to implement OS specific PCD interface.
+ *
+ * An important function of the PCD is managing interrupts generated
+ * by the DWC_otg controller. The implementation of the DWC_otg device
+ * mode interrupt service routines is in dwc_otg_pcd_intr.c.
+ *
+ * @todo Add Device Mode test modes (Test J mode, Test K mode, etc).
+ * @todo Does it work when the request size is greater than DEPTSIZ
+ * transfer size
+ *
+ */
+
+#include "dwc_otg_pcd.h"
+
+#ifdef DWC_UTE_CFI
+#include "dwc_otg_cfi.h"
+
+extern int init_cfi(cfiobject_t * cfiobj);
+#endif
+
+/**
+ * Choose endpoint from ep arrays using usb_ep structure.
+ */
+static dwc_otg_pcd_ep_t *get_ep_from_handle(dwc_otg_pcd_t * pcd, void *handle)
+{
+       int i;
+       if (pcd->ep0.priv == handle) {
+               return &pcd->ep0;
+       }
+       for (i = 0; i < MAX_EPS_CHANNELS - 1; i++) {
+               if (pcd->in_ep[i].priv == handle)
+                       return &pcd->in_ep[i];
+               if (pcd->out_ep[i].priv == handle)
+                       return &pcd->out_ep[i];
+       }
+
+       return NULL;
+}
+
+/**
+ * This function completes a request.  It call's the request call back.
+ */
+void dwc_otg_request_done(dwc_otg_pcd_ep_t * ep, dwc_otg_pcd_request_t * req,
+                         int32_t status)
+{
+       unsigned stopped = ep->stopped;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(ep %p req %p)\n", __func__, ep, req);
+       DWC_CIRCLEQ_REMOVE_INIT(&ep->queue, req, queue_entry);
+
+       /* don't modify queue heads during completion callback */
+       ep->stopped = 1;
+       /* spin_unlock/spin_lock now done in fops->complete() */
+       ep->pcd->fops->complete(ep->pcd, ep->priv, req->priv, status,
+                               req->actual);
+
+       if (ep->pcd->request_pending > 0) {
+               --ep->pcd->request_pending;
+       }
+
+       ep->stopped = stopped;
+       DWC_FREE(req);
+}
+
+/**
+ * This function terminates all the requsts in the EP request queue.
+ */
+void dwc_otg_request_nuke(dwc_otg_pcd_ep_t * ep)
+{
+       dwc_otg_pcd_request_t *req;
+
+       ep->stopped = 1;
+
+       /* called with irqs blocked?? */
+       while (!DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+               req = DWC_CIRCLEQ_FIRST(&ep->queue);
+               dwc_otg_request_done(ep, req, -DWC_E_SHUTDOWN);
+       }
+}
+
+void dwc_otg_pcd_start(dwc_otg_pcd_t * pcd,
+                      const struct dwc_otg_pcd_function_ops *fops)
+{
+       pcd->fops = fops;
+}
+
+/**
+ * PCD Callback function for initializing the PCD when switching to
+ * device mode.
+ *
+ * @param p void pointer to the <code>dwc_otg_pcd_t</code>
+ */
+static int32_t dwc_otg_pcd_start_cb(void *p)
+{
+       dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) p;
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+
+       /*
+        * Initialized the Core for Device mode.
+        */
+       if (dwc_otg_is_device_mode(core_if)) {
+               dwc_otg_core_dev_init(core_if);
+               /* Set core_if's lock pointer to the pcd->lock */
+               core_if->lock = pcd->lock;
+       }
+       return 1;
+}
+
+/** CFI-specific buffer allocation function for EP */
+#ifdef DWC_UTE_CFI
+uint8_t *cfiw_ep_alloc_buffer(dwc_otg_pcd_t * pcd, void *pep, dwc_dma_t * addr,
+                             size_t buflen, int flags)
+{
+       dwc_otg_pcd_ep_t *ep;
+       ep = get_ep_from_handle(pcd, pep);
+       if (!ep) {
+               DWC_WARN("bad ep\n");
+               return -DWC_E_INVALID;
+       }
+
+       return pcd->cfi->ops.ep_alloc_buf(pcd->cfi, pcd, ep, addr, buflen,
+                                         flags);
+}
+#else
+uint8_t *cfiw_ep_alloc_buffer(dwc_otg_pcd_t * pcd, void *pep, dwc_dma_t * addr,
+                             size_t buflen, int flags);
+#endif
+
+/**
+ * PCD Callback function for notifying the PCD when resuming from
+ * suspend.
+ *
+ * @param p void pointer to the <code>dwc_otg_pcd_t</code>
+ */
+static int32_t dwc_otg_pcd_resume_cb(void *p)
+{
+       dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) p;
+
+       if (pcd->fops->resume) {
+               pcd->fops->resume(pcd);
+       }
+
+       /* Stop the SRP timeout timer. */
+       if ((GET_CORE_IF(pcd)->core_params->phy_type != DWC_PHY_TYPE_PARAM_FS)
+           || (!GET_CORE_IF(pcd)->core_params->i2c_enable)) {
+               if (GET_CORE_IF(pcd)->srp_timer_started) {
+                       GET_CORE_IF(pcd)->srp_timer_started = 0;
+                       DWC_TIMER_CANCEL(GET_CORE_IF(pcd)->srp_timer);
+               }
+       }
+       return 1;
+}
+
+/**
+ * PCD Callback function for notifying the PCD device is suspended.
+ *
+ * @param p void pointer to the <code>dwc_otg_pcd_t</code>
+ */
+static int32_t dwc_otg_pcd_suspend_cb(void *p)
+{
+       dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) p;
+
+       if (pcd->fops->suspend) {
+               DWC_SPINUNLOCK(pcd->lock);
+               pcd->fops->suspend(pcd);
+               DWC_SPINLOCK(pcd->lock);
+       }
+
+       return 1;
+}
+
+/**
+ * PCD Callback function for stopping the PCD when switching to Host
+ * mode.
+ *
+ * @param p void pointer to the <code>dwc_otg_pcd_t</code>
+ */
+static int32_t dwc_otg_pcd_stop_cb(void *p)
+{
+       dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) p;
+       extern void dwc_otg_pcd_stop(dwc_otg_pcd_t * _pcd);
+
+       dwc_otg_pcd_stop(pcd);
+       return 1;
+}
+
+/**
+ * PCD Callback structure for handling mode switching.
+ */
+static dwc_otg_cil_callbacks_t pcd_callbacks = {
+       .start = dwc_otg_pcd_start_cb,
+       .stop = dwc_otg_pcd_stop_cb,
+       .suspend = dwc_otg_pcd_suspend_cb,
+       .resume_wakeup = dwc_otg_pcd_resume_cb,
+       .p = 0,                 /* Set at registration */
+};
+
+/**
+ * This function allocates a DMA Descriptor chain for the Endpoint
+ * buffer to be used for a transfer to/from the specified endpoint.
+ */
+dwc_otg_dev_dma_desc_t *dwc_otg_ep_alloc_desc_chain(struct device *dev,
+                                                   dwc_dma_t * dma_desc_addr,
+                                                   uint32_t count)
+{
+       return DWC_DMA_ALLOC_ATOMIC(dev, count * sizeof(dwc_otg_dev_dma_desc_t),
+                                                       dma_desc_addr);
+}
+
+/**
+ * This function frees a DMA Descriptor chain that was allocated by ep_alloc_desc.
+ */
+void dwc_otg_ep_free_desc_chain(struct device *dev,
+                               dwc_otg_dev_dma_desc_t * desc_addr,
+                               uint32_t dma_desc_addr, uint32_t count)
+{
+       DWC_DMA_FREE(dev, count * sizeof(dwc_otg_dev_dma_desc_t), desc_addr,
+                    dma_desc_addr);
+}
+
+#ifdef DWC_EN_ISOC
+
+/**
+ * This function initializes a descriptor chain for Isochronous transfer
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param dwc_ep The EP to start the transfer on.
+ *
+ */
+void dwc_otg_iso_ep_start_ddma_transfer(dwc_otg_core_if_t * core_if,
+                                       dwc_ep_t * dwc_ep)
+{
+
+       dsts_data_t dsts = {.d32 = 0 };
+       depctl_data_t depctl = {.d32 = 0 };
+       volatile uint32_t *addr;
+       int i, j;
+       uint32_t len;
+
+       if (dwc_ep->is_in)
+               dwc_ep->desc_cnt = dwc_ep->buf_proc_intrvl / dwc_ep->bInterval;
+       else
+               dwc_ep->desc_cnt =
+                   dwc_ep->buf_proc_intrvl * dwc_ep->pkt_per_frm /
+                   dwc_ep->bInterval;
+
+       /** Allocate descriptors for double buffering */
+       dwc_ep->iso_desc_addr =
+           dwc_otg_ep_alloc_desc_chain(&dwc_ep->iso_dma_desc_addr,
+                                       dwc_ep->desc_cnt * 2);
+       if (dwc_ep->desc_addr) {
+               DWC_WARN("%s, can't allocate DMA descriptor chain\n", __func__);
+               return;
+       }
+
+       dsts.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
+
+       /** ISO OUT EP */
+       if (dwc_ep->is_in == 0) {
+               dev_dma_desc_sts_t sts = {.d32 = 0 };
+               dwc_otg_dev_dma_desc_t *dma_desc = dwc_ep->iso_desc_addr;
+               dma_addr_t dma_ad;
+               uint32_t data_per_desc;
+               dwc_otg_dev_out_ep_regs_t *out_regs =
+                   core_if->dev_if->out_ep_regs[dwc_ep->num];
+               int offset;
+
+               addr = &core_if->dev_if->out_ep_regs[dwc_ep->num]->doepctl;
+               dma_ad = (dma_addr_t) DWC_READ_REG32(&(out_regs->doepdma));
+
+               /** Buffer 0 descriptors setup */
+               dma_ad = dwc_ep->dma_addr0;
+
+               sts.b_iso_out.bs = BS_HOST_READY;
+               sts.b_iso_out.rxsts = 0;
+               sts.b_iso_out.l = 0;
+               sts.b_iso_out.sp = 0;
+               sts.b_iso_out.ioc = 0;
+               sts.b_iso_out.pid = 0;
+               sts.b_iso_out.framenum = 0;
+
+               offset = 0;
+               for (i = 0; i < dwc_ep->desc_cnt - dwc_ep->pkt_per_frm;
+                    i += dwc_ep->pkt_per_frm) {
+
+                       for (j = 0; j < dwc_ep->pkt_per_frm; ++j) {
+                               uint32_t len = (j + 1) * dwc_ep->maxpacket;
+                               if (len > dwc_ep->data_per_frame)
+                                       data_per_desc =
+                                           dwc_ep->data_per_frame -
+                                           j * dwc_ep->maxpacket;
+                               else
+                                       data_per_desc = dwc_ep->maxpacket;
+                               len = data_per_desc % 4;
+                               if (len)
+                                       data_per_desc += 4 - len;
+
+                               sts.b_iso_out.rxbytes = data_per_desc;
+                               dma_desc->buf = dma_ad;
+                               dma_desc->status.d32 = sts.d32;
+
+                               offset += data_per_desc;
+                               dma_desc++;
+                               dma_ad += data_per_desc;
+                       }
+               }
+
+               for (j = 0; j < dwc_ep->pkt_per_frm - 1; ++j) {
+                       uint32_t len = (j + 1) * dwc_ep->maxpacket;
+                       if (len > dwc_ep->data_per_frame)
+                               data_per_desc =
+                                   dwc_ep->data_per_frame -
+                                   j * dwc_ep->maxpacket;
+                       else
+                               data_per_desc = dwc_ep->maxpacket;
+                       len = data_per_desc % 4;
+                       if (len)
+                               data_per_desc += 4 - len;
+                       sts.b_iso_out.rxbytes = data_per_desc;
+                       dma_desc->buf = dma_ad;
+                       dma_desc->status.d32 = sts.d32;
+
+                       offset += data_per_desc;
+                       dma_desc++;
+                       dma_ad += data_per_desc;
+               }
+
+               sts.b_iso_out.ioc = 1;
+               len = (j + 1) * dwc_ep->maxpacket;
+               if (len > dwc_ep->data_per_frame)
+                       data_per_desc =
+                           dwc_ep->data_per_frame - j * dwc_ep->maxpacket;
+               else
+                       data_per_desc = dwc_ep->maxpacket;
+               len = data_per_desc % 4;
+               if (len)
+                       data_per_desc += 4 - len;
+               sts.b_iso_out.rxbytes = data_per_desc;
+
+               dma_desc->buf = dma_ad;
+               dma_desc->status.d32 = sts.d32;
+               dma_desc++;
+
+               /** Buffer 1 descriptors setup */
+               sts.b_iso_out.ioc = 0;
+               dma_ad = dwc_ep->dma_addr1;
+
+               offset = 0;
+               for (i = 0; i < dwc_ep->desc_cnt - dwc_ep->pkt_per_frm;
+                    i += dwc_ep->pkt_per_frm) {
+                       for (j = 0; j < dwc_ep->pkt_per_frm; ++j) {
+                               uint32_t len = (j + 1) * dwc_ep->maxpacket;
+                               if (len > dwc_ep->data_per_frame)
+                                       data_per_desc =
+                                           dwc_ep->data_per_frame -
+                                           j * dwc_ep->maxpacket;
+                               else
+                                       data_per_desc = dwc_ep->maxpacket;
+                               len = data_per_desc % 4;
+                               if (len)
+                                       data_per_desc += 4 - len;
+
+                               data_per_desc =
+                                   sts.b_iso_out.rxbytes = data_per_desc;
+                               dma_desc->buf = dma_ad;
+                               dma_desc->status.d32 = sts.d32;
+
+                               offset += data_per_desc;
+                               dma_desc++;
+                               dma_ad += data_per_desc;
+                       }
+               }
+               for (j = 0; j < dwc_ep->pkt_per_frm - 1; ++j) {
+                       data_per_desc =
+                           ((j + 1) * dwc_ep->maxpacket >
+                            dwc_ep->data_per_frame) ? dwc_ep->data_per_frame -
+                           j * dwc_ep->maxpacket : dwc_ep->maxpacket;
+                       data_per_desc +=
+                           (data_per_desc % 4) ? (4 - data_per_desc % 4) : 0;
+                       sts.b_iso_out.rxbytes = data_per_desc;
+                       dma_desc->buf = dma_ad;
+                       dma_desc->status.d32 = sts.d32;
+
+                       offset += data_per_desc;
+                       dma_desc++;
+                       dma_ad += data_per_desc;
+               }
+
+               sts.b_iso_out.ioc = 1;
+               sts.b_iso_out.l = 1;
+               data_per_desc =
+                   ((j + 1) * dwc_ep->maxpacket >
+                    dwc_ep->data_per_frame) ? dwc_ep->data_per_frame -
+                   j * dwc_ep->maxpacket : dwc_ep->maxpacket;
+               data_per_desc +=
+                   (data_per_desc % 4) ? (4 - data_per_desc % 4) : 0;
+               sts.b_iso_out.rxbytes = data_per_desc;
+
+               dma_desc->buf = dma_ad;
+               dma_desc->status.d32 = sts.d32;
+
+               dwc_ep->next_frame = 0;
+
+               /** Write dma_ad into DOEPDMA register */
+               DWC_WRITE_REG32(&(out_regs->doepdma),
+                               (uint32_t) dwc_ep->iso_dma_desc_addr);
+
+       }
+       /** ISO IN EP */
+       else {
+               dev_dma_desc_sts_t sts = {.d32 = 0 };
+               dwc_otg_dev_dma_desc_t *dma_desc = dwc_ep->iso_desc_addr;
+               dma_addr_t dma_ad;
+               dwc_otg_dev_in_ep_regs_t *in_regs =
+                   core_if->dev_if->in_ep_regs[dwc_ep->num];
+               unsigned int frmnumber;
+               fifosize_data_t txfifosize, rxfifosize;
+
+               txfifosize.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->in_ep_regs[dwc_ep->num]->
+                                  dtxfsts);
+               rxfifosize.d32 =
+                   DWC_READ_REG32(&core_if->core_global_regs->grxfsiz);
+
+               addr = &core_if->dev_if->in_ep_regs[dwc_ep->num]->diepctl;
+
+               dma_ad = dwc_ep->dma_addr0;
+
+               dsts.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
+
+               sts.b_iso_in.bs = BS_HOST_READY;
+               sts.b_iso_in.txsts = 0;
+               sts.b_iso_in.sp =
+                   (dwc_ep->data_per_frame % dwc_ep->maxpacket) ? 1 : 0;
+               sts.b_iso_in.ioc = 0;
+               sts.b_iso_in.pid = dwc_ep->pkt_per_frm;
+
+               frmnumber = dwc_ep->next_frame;
+
+               sts.b_iso_in.framenum = frmnumber;
+               sts.b_iso_in.txbytes = dwc_ep->data_per_frame;
+               sts.b_iso_in.l = 0;
+
+               /** Buffer 0 descriptors setup */
+               for (i = 0; i < dwc_ep->desc_cnt - 1; i++) {
+                       dma_desc->buf = dma_ad;
+                       dma_desc->status.d32 = sts.d32;
+                       dma_desc++;
+
+                       dma_ad += dwc_ep->data_per_frame;
+                       sts.b_iso_in.framenum += dwc_ep->bInterval;
+               }
+
+               sts.b_iso_in.ioc = 1;
+               dma_desc->buf = dma_ad;
+               dma_desc->status.d32 = sts.d32;
+               ++dma_desc;
+
+               /** Buffer 1 descriptors setup */
+               sts.b_iso_in.ioc = 0;
+               dma_ad = dwc_ep->dma_addr1;
+
+               for (i = 0; i < dwc_ep->desc_cnt - dwc_ep->pkt_per_frm;
+                    i += dwc_ep->pkt_per_frm) {
+                       dma_desc->buf = dma_ad;
+                       dma_desc->status.d32 = sts.d32;
+                       dma_desc++;
+
+                       dma_ad += dwc_ep->data_per_frame;
+                       sts.b_iso_in.framenum += dwc_ep->bInterval;
+
+                       sts.b_iso_in.ioc = 0;
+               }
+               sts.b_iso_in.ioc = 1;
+               sts.b_iso_in.l = 1;
+
+               dma_desc->buf = dma_ad;
+               dma_desc->status.d32 = sts.d32;
+
+               dwc_ep->next_frame = sts.b_iso_in.framenum + dwc_ep->bInterval;
+
+               /** Write dma_ad into diepdma register */
+               DWC_WRITE_REG32(&(in_regs->diepdma),
+                               (uint32_t) dwc_ep->iso_dma_desc_addr);
+       }
+       /** Enable endpoint, clear nak  */
+       depctl.d32 = 0;
+       depctl.b.epena = 1;
+       depctl.b.usbactep = 1;
+       depctl.b.cnak = 1;
+
+       DWC_MODIFY_REG32(addr, depctl.d32, depctl.d32);
+       depctl.d32 = DWC_READ_REG32(addr);
+}
+
+/**
+ * This function initializes a descriptor chain for Isochronous transfer
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ *
+ */
+void dwc_otg_iso_ep_start_buf_transfer(dwc_otg_core_if_t * core_if,
+                                      dwc_ep_t * ep)
+{
+       depctl_data_t depctl = {.d32 = 0 };
+       volatile uint32_t *addr;
+
+       if (ep->is_in) {
+               addr = &core_if->dev_if->in_ep_regs[ep->num]->diepctl;
+       } else {
+               addr = &core_if->dev_if->out_ep_regs[ep->num]->doepctl;
+       }
+
+       if (core_if->dma_enable == 0 || core_if->dma_desc_enable != 0) {
+               return;
+       } else {
+               deptsiz_data_t deptsiz = {.d32 = 0 };
+
+               ep->xfer_len =
+                   ep->data_per_frame * ep->buf_proc_intrvl / ep->bInterval;
+               ep->pkt_cnt =
+                   (ep->xfer_len - 1 + ep->maxpacket) / ep->maxpacket;
+               ep->xfer_count = 0;
+               ep->xfer_buff =
+                   (ep->proc_buf_num) ? ep->xfer_buff1 : ep->xfer_buff0;
+               ep->dma_addr =
+                   (ep->proc_buf_num) ? ep->dma_addr1 : ep->dma_addr0;
+
+               if (ep->is_in) {
+                       /* Program the transfer size and packet count
+                        *      as follows: xfersize = N * maxpacket +
+                        *      short_packet pktcnt = N + (short_packet
+                        *      exist ? 1 : 0)
+                        */
+                       deptsiz.b.mc = ep->pkt_per_frm;
+                       deptsiz.b.xfersize = ep->xfer_len;
+                       deptsiz.b.pktcnt =
+                           (ep->xfer_len - 1 + ep->maxpacket) / ep->maxpacket;
+                       DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[ep->num]->
+                                       dieptsiz, deptsiz.d32);
+
+                       /* Write the DMA register */
+                       DWC_WRITE_REG32(&
+                                       (core_if->dev_if->in_ep_regs[ep->num]->
+                                        diepdma), (uint32_t) ep->dma_addr);
+
+               } else {
+                       deptsiz.b.pktcnt =
+                           (ep->xfer_len + (ep->maxpacket - 1)) /
+                           ep->maxpacket;
+                       deptsiz.b.xfersize = deptsiz.b.pktcnt * ep->maxpacket;
+
+                       DWC_WRITE_REG32(&core_if->dev_if->out_ep_regs[ep->num]->
+                                       doeptsiz, deptsiz.d32);
+
+                       /* Write the DMA register */
+                       DWC_WRITE_REG32(&
+                                       (core_if->dev_if->out_ep_regs[ep->num]->
+                                        doepdma), (uint32_t) ep->dma_addr);
+
+               }
+               /** Enable endpoint, clear nak  */
+               depctl.d32 = 0;
+               depctl.b.epena = 1;
+               depctl.b.cnak = 1;
+
+               DWC_MODIFY_REG32(addr, depctl.d32, depctl.d32);
+       }
+}
+
+/**
+ * This function does the setup for a data transfer for an EP and
+ * starts the transfer. For an IN transfer, the packets will be
+ * loaded into the appropriate Tx FIFO in the ISR. For OUT transfers,
+ * the packets are unloaded from the Rx FIFO in the ISR.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ */
+
+static void dwc_otg_iso_ep_start_transfer(dwc_otg_core_if_t * core_if,
+                                         dwc_ep_t * ep)
+{
+       if (core_if->dma_enable) {
+               if (core_if->dma_desc_enable) {
+                       if (ep->is_in) {
+                               ep->desc_cnt = ep->pkt_cnt / ep->pkt_per_frm;
+                       } else {
+                               ep->desc_cnt = ep->pkt_cnt;
+                       }
+                       dwc_otg_iso_ep_start_ddma_transfer(core_if, ep);
+               } else {
+                       if (core_if->pti_enh_enable) {
+                               dwc_otg_iso_ep_start_buf_transfer(core_if, ep);
+                       } else {
+                               ep->cur_pkt_addr =
+                                   (ep->proc_buf_num) ? ep->xfer_buff1 : ep->
+                                   xfer_buff0;
+                               ep->cur_pkt_dma_addr =
+                                   (ep->proc_buf_num) ? ep->dma_addr1 : ep->
+                                   dma_addr0;
+                               dwc_otg_iso_ep_start_frm_transfer(core_if, ep);
+                       }
+               }
+       } else {
+               ep->cur_pkt_addr =
+                   (ep->proc_buf_num) ? ep->xfer_buff1 : ep->xfer_buff0;
+               ep->cur_pkt_dma_addr =
+                   (ep->proc_buf_num) ? ep->dma_addr1 : ep->dma_addr0;
+               dwc_otg_iso_ep_start_frm_transfer(core_if, ep);
+       }
+}
+
+/**
+ * This function stops transfer for an EP and
+ * resets the ep's variables.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ */
+
+void dwc_otg_iso_ep_stop_transfer(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       depctl_data_t depctl = {.d32 = 0 };
+       volatile uint32_t *addr;
+
+       if (ep->is_in == 1) {
+               addr = &core_if->dev_if->in_ep_regs[ep->num]->diepctl;
+       } else {
+               addr = &core_if->dev_if->out_ep_regs[ep->num]->doepctl;
+       }
+
+       /* disable the ep */
+       depctl.d32 = DWC_READ_REG32(addr);
+
+       depctl.b.epdis = 1;
+       depctl.b.snak = 1;
+
+       DWC_WRITE_REG32(addr, depctl.d32);
+
+       if (core_if->dma_desc_enable &&
+           ep->iso_desc_addr && ep->iso_dma_desc_addr) {
+               dwc_otg_ep_free_desc_chain(ep->iso_desc_addr,
+                                          ep->iso_dma_desc_addr,
+                                          ep->desc_cnt * 2);
+       }
+
+       /* reset varibales */
+       ep->dma_addr0 = 0;
+       ep->dma_addr1 = 0;
+       ep->xfer_buff0 = 0;
+       ep->xfer_buff1 = 0;
+       ep->data_per_frame = 0;
+       ep->data_pattern_frame = 0;
+       ep->sync_frame = 0;
+       ep->buf_proc_intrvl = 0;
+       ep->bInterval = 0;
+       ep->proc_buf_num = 0;
+       ep->pkt_per_frm = 0;
+       ep->pkt_per_frm = 0;
+       ep->desc_cnt = 0;
+       ep->iso_desc_addr = 0;
+       ep->iso_dma_desc_addr = 0;
+}
+
+int dwc_otg_pcd_iso_ep_start(dwc_otg_pcd_t * pcd, void *ep_handle,
+                            uint8_t * buf0, uint8_t * buf1, dwc_dma_t dma0,
+                            dwc_dma_t dma1, int sync_frame, int dp_frame,
+                            int data_per_frame, int start_frame,
+                            int buf_proc_intrvl, void *req_handle,
+                            int atomic_alloc)
+{
+       dwc_otg_pcd_ep_t *ep;
+       dwc_irqflags_t flags = 0;
+       dwc_ep_t *dwc_ep;
+       int32_t frm_data;
+       dsts_data_t dsts;
+       dwc_otg_core_if_t *core_if;
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+
+       if (!ep || !ep->desc || ep->dwc_ep.num == 0) {
+               DWC_WARN("bad ep\n");
+               return -DWC_E_INVALID;
+       }
+
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+       core_if = GET_CORE_IF(pcd);
+       dwc_ep = &ep->dwc_ep;
+
+       if (ep->iso_req_handle) {
+               DWC_WARN("ISO request in progress\n");
+       }
+
+       dwc_ep->dma_addr0 = dma0;
+       dwc_ep->dma_addr1 = dma1;
+
+       dwc_ep->xfer_buff0 = buf0;
+       dwc_ep->xfer_buff1 = buf1;
+
+       dwc_ep->data_per_frame = data_per_frame;
+
+       /** @todo - pattern data support is to be implemented in the future */
+       dwc_ep->data_pattern_frame = dp_frame;
+       dwc_ep->sync_frame = sync_frame;
+
+       dwc_ep->buf_proc_intrvl = buf_proc_intrvl;
+
+       dwc_ep->bInterval = 1 << (ep->desc->bInterval - 1);
+
+       dwc_ep->proc_buf_num = 0;
+
+       dwc_ep->pkt_per_frm = 0;
+       frm_data = ep->dwc_ep.data_per_frame;
+       while (frm_data > 0) {
+               dwc_ep->pkt_per_frm++;
+               frm_data -= ep->dwc_ep.maxpacket;
+       }
+
+       dsts.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
+
+       if (start_frame == -1) {
+               dwc_ep->next_frame = dsts.b.soffn + 1;
+               if (dwc_ep->bInterval != 1) {
+                       dwc_ep->next_frame =
+                           dwc_ep->next_frame + (dwc_ep->bInterval - 1 -
+                                                 dwc_ep->next_frame %
+                                                 dwc_ep->bInterval);
+               }
+       } else {
+               dwc_ep->next_frame = start_frame;
+       }
+
+       if (!core_if->pti_enh_enable) {
+               dwc_ep->pkt_cnt =
+                   dwc_ep->buf_proc_intrvl * dwc_ep->pkt_per_frm /
+                   dwc_ep->bInterval;
+       } else {
+               dwc_ep->pkt_cnt =
+                   (dwc_ep->data_per_frame *
+                    (dwc_ep->buf_proc_intrvl / dwc_ep->bInterval)
+                    - 1 + dwc_ep->maxpacket) / dwc_ep->maxpacket;
+       }
+
+       if (core_if->dma_desc_enable) {
+               dwc_ep->desc_cnt =
+                   dwc_ep->buf_proc_intrvl * dwc_ep->pkt_per_frm /
+                   dwc_ep->bInterval;
+       }
+
+       if (atomic_alloc) {
+               dwc_ep->pkt_info =
+                   DWC_ALLOC_ATOMIC(sizeof(iso_pkt_info_t) * dwc_ep->pkt_cnt);
+       } else {
+               dwc_ep->pkt_info =
+                   DWC_ALLOC(sizeof(iso_pkt_info_t) * dwc_ep->pkt_cnt);
+       }
+       if (!dwc_ep->pkt_info) {
+               DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+               return -DWC_E_NO_MEMORY;
+       }
+       if (core_if->pti_enh_enable) {
+               dwc_memset(dwc_ep->pkt_info, 0,
+                          sizeof(iso_pkt_info_t) * dwc_ep->pkt_cnt);
+       }
+
+       dwc_ep->cur_pkt = 0;
+       ep->iso_req_handle = req_handle;
+
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+       dwc_otg_iso_ep_start_transfer(core_if, dwc_ep);
+       return 0;
+}
+
+int dwc_otg_pcd_iso_ep_stop(dwc_otg_pcd_t * pcd, void *ep_handle,
+                           void *req_handle)
+{
+       dwc_irqflags_t flags = 0;
+       dwc_otg_pcd_ep_t *ep;
+       dwc_ep_t *dwc_ep;
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+       if (!ep || !ep->desc || ep->dwc_ep.num == 0) {
+               DWC_WARN("bad ep\n");
+               return -DWC_E_INVALID;
+       }
+       dwc_ep = &ep->dwc_ep;
+
+       dwc_otg_iso_ep_stop_transfer(GET_CORE_IF(pcd), dwc_ep);
+
+       DWC_FREE(dwc_ep->pkt_info);
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+       if (ep->iso_req_handle != req_handle) {
+               DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+               return -DWC_E_INVALID;
+       }
+
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+
+       ep->iso_req_handle = 0;
+       return 0;
+}
+
+/**
+ * This function is used for perodical data exchnage between PCD and gadget drivers.
+ * for Isochronous EPs
+ *
+ *     - Every time a sync period completes this function is called to
+ *       perform data exchange between PCD and gadget
+ */
+void dwc_otg_iso_buffer_done(dwc_otg_pcd_t * pcd, dwc_otg_pcd_ep_t * ep,
+                            void *req_handle)
+{
+       int i;
+       dwc_ep_t *dwc_ep;
+
+       dwc_ep = &ep->dwc_ep;
+
+       DWC_SPINUNLOCK(ep->pcd->lock);
+       pcd->fops->isoc_complete(pcd, ep->priv, ep->iso_req_handle,
+                                dwc_ep->proc_buf_num ^ 0x1);
+       DWC_SPINLOCK(ep->pcd->lock);
+
+       for (i = 0; i < dwc_ep->pkt_cnt; ++i) {
+               dwc_ep->pkt_info[i].status = 0;
+               dwc_ep->pkt_info[i].offset = 0;
+               dwc_ep->pkt_info[i].length = 0;
+       }
+}
+
+int dwc_otg_pcd_get_iso_packet_count(dwc_otg_pcd_t * pcd, void *ep_handle,
+                                    void *iso_req_handle)
+{
+       dwc_otg_pcd_ep_t *ep;
+       dwc_ep_t *dwc_ep;
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+       if (!ep->desc || ep->dwc_ep.num == 0) {
+               DWC_WARN("bad ep\n");
+               return -DWC_E_INVALID;
+       }
+       dwc_ep = &ep->dwc_ep;
+
+       return dwc_ep->pkt_cnt;
+}
+
+void dwc_otg_pcd_get_iso_packet_params(dwc_otg_pcd_t * pcd, void *ep_handle,
+                                      void *iso_req_handle, int packet,
+                                      int *status, int *actual, int *offset)
+{
+       dwc_otg_pcd_ep_t *ep;
+       dwc_ep_t *dwc_ep;
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+       if (!ep)
+               DWC_WARN("bad ep\n");
+
+       dwc_ep = &ep->dwc_ep;
+
+       *status = dwc_ep->pkt_info[packet].status;
+       *actual = dwc_ep->pkt_info[packet].length;
+       *offset = dwc_ep->pkt_info[packet].offset;
+}
+
+#endif /* DWC_EN_ISOC */
+
+static void dwc_otg_pcd_init_ep(dwc_otg_pcd_t * pcd, dwc_otg_pcd_ep_t * pcd_ep,
+                               uint32_t is_in, uint32_t ep_num)
+{
+       /* Init EP structure */
+       pcd_ep->desc = 0;
+       pcd_ep->pcd = pcd;
+       pcd_ep->stopped = 1;
+       pcd_ep->queue_sof = 0;
+
+       /* Init DWC ep structure */
+       pcd_ep->dwc_ep.is_in = is_in;
+       pcd_ep->dwc_ep.num = ep_num;
+       pcd_ep->dwc_ep.active = 0;
+       pcd_ep->dwc_ep.tx_fifo_num = 0;
+       /* Control until ep is actvated */
+       pcd_ep->dwc_ep.type = DWC_OTG_EP_TYPE_CONTROL;
+       pcd_ep->dwc_ep.maxpacket = MAX_PACKET_SIZE;
+       pcd_ep->dwc_ep.dma_addr = 0;
+       pcd_ep->dwc_ep.start_xfer_buff = 0;
+       pcd_ep->dwc_ep.xfer_buff = 0;
+       pcd_ep->dwc_ep.xfer_len = 0;
+       pcd_ep->dwc_ep.xfer_count = 0;
+       pcd_ep->dwc_ep.sent_zlp = 0;
+       pcd_ep->dwc_ep.total_len = 0;
+       pcd_ep->dwc_ep.desc_addr = 0;
+       pcd_ep->dwc_ep.dma_desc_addr = 0;
+       DWC_CIRCLEQ_INIT(&pcd_ep->queue);
+}
+
+/**
+ * Initialize ep's
+ */
+static void dwc_otg_pcd_reinit(dwc_otg_pcd_t * pcd)
+{
+       int i;
+       uint32_t hwcfg1;
+       dwc_otg_pcd_ep_t *ep;
+       int in_ep_cntr, out_ep_cntr;
+       uint32_t num_in_eps = (GET_CORE_IF(pcd))->dev_if->num_in_eps;
+       uint32_t num_out_eps = (GET_CORE_IF(pcd))->dev_if->num_out_eps;
+
+       /**
+        * Initialize the EP0 structure.
+        */
+       ep = &pcd->ep0;
+       dwc_otg_pcd_init_ep(pcd, ep, 0, 0);
+
+       in_ep_cntr = 0;
+       hwcfg1 = (GET_CORE_IF(pcd))->hwcfg1.d32 >> 3;
+       for (i = 1; in_ep_cntr < num_in_eps; i++) {
+               if ((hwcfg1 & 0x1) == 0) {
+                       dwc_otg_pcd_ep_t *ep = &pcd->in_ep[in_ep_cntr];
+                       in_ep_cntr++;
+                       /**
+                        * @todo NGS: Add direction to EP, based on contents
+                        * of HWCFG1.  Need a copy of HWCFG1 in pcd structure?
+                        * sprintf(";r
+                        */
+                       dwc_otg_pcd_init_ep(pcd, ep, 1 /* IN */ , i);
+
+                       DWC_CIRCLEQ_INIT(&ep->queue);
+               }
+               hwcfg1 >>= 2;
+       }
+
+       out_ep_cntr = 0;
+       hwcfg1 = (GET_CORE_IF(pcd))->hwcfg1.d32 >> 2;
+       for (i = 1; out_ep_cntr < num_out_eps; i++) {
+               if ((hwcfg1 & 0x1) == 0) {
+                       dwc_otg_pcd_ep_t *ep = &pcd->out_ep[out_ep_cntr];
+                       out_ep_cntr++;
+                       /**
+                        * @todo NGS: Add direction to EP, based on contents
+                        * of HWCFG1.  Need a copy of HWCFG1 in pcd structure?
+                        * sprintf(";r
+                        */
+                       dwc_otg_pcd_init_ep(pcd, ep, 0 /* OUT */ , i);
+                       DWC_CIRCLEQ_INIT(&ep->queue);
+               }
+               hwcfg1 >>= 2;
+       }
+
+       pcd->ep0state = EP0_DISCONNECT;
+       pcd->ep0.dwc_ep.maxpacket = MAX_EP0_SIZE;
+       pcd->ep0.dwc_ep.type = DWC_OTG_EP_TYPE_CONTROL;
+}
+
+/**
+ * This function is called when the SRP timer expires. The SRP should
+ * complete within 6 seconds.
+ */
+static void srp_timeout(void *ptr)
+{
+       gotgctl_data_t gotgctl;
+       dwc_otg_core_if_t *core_if = (dwc_otg_core_if_t *) ptr;
+       volatile uint32_t *addr = &core_if->core_global_regs->gotgctl;
+
+       gotgctl.d32 = DWC_READ_REG32(addr);
+
+       core_if->srp_timer_started = 0;
+
+       if (core_if->adp_enable) {
+               if (gotgctl.b.bsesvld == 0) {
+                       gpwrdn_data_t gpwrdn = {.d32 = 0 };
+                       DWC_PRINTF("SRP Timeout BSESSVLD = 0\n");
+                       /* Power off the core */
+                       if (core_if->power_down == 2) {
+                               gpwrdn.b.pwrdnswtch = 1;
+                               DWC_MODIFY_REG32(&core_if->
+                                                core_global_regs->gpwrdn,
+                                                gpwrdn.d32, 0);
+                       }
+
+                       gpwrdn.d32 = 0;
+                       gpwrdn.b.pmuintsel = 1;
+                       gpwrdn.b.pmuactv = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0,
+                                        gpwrdn.d32);
+                       dwc_otg_adp_probe_start(core_if);
+               } else {
+                       DWC_PRINTF("SRP Timeout BSESSVLD = 1\n");
+                       core_if->op_state = B_PERIPHERAL;
+                       dwc_otg_core_init(core_if);
+                       dwc_otg_enable_global_interrupts(core_if);
+                       cil_pcd_start(core_if);
+               }
+       }
+
+       if ((core_if->core_params->phy_type == DWC_PHY_TYPE_PARAM_FS) &&
+           (core_if->core_params->i2c_enable)) {
+               DWC_PRINTF("SRP Timeout\n");
+
+               if ((core_if->srp_success) && (gotgctl.b.bsesvld)) {
+                       if (core_if->pcd_cb && core_if->pcd_cb->resume_wakeup) {
+                               core_if->pcd_cb->resume_wakeup(core_if->pcd_cb->p);
+                       }
+
+                       /* Clear Session Request */
+                       gotgctl.d32 = 0;
+                       gotgctl.b.sesreq = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gotgctl,
+                                        gotgctl.d32, 0);
+
+                       core_if->srp_success = 0;
+               } else {
+                       __DWC_ERROR("Device not connected/responding\n");
+                       gotgctl.b.sesreq = 0;
+                       DWC_WRITE_REG32(addr, gotgctl.d32);
+               }
+       } else if (gotgctl.b.sesreq) {
+               DWC_PRINTF("SRP Timeout\n");
+
+               __DWC_ERROR("Device not connected/responding\n");
+               gotgctl.b.sesreq = 0;
+               DWC_WRITE_REG32(addr, gotgctl.d32);
+       } else {
+               DWC_PRINTF(" SRP GOTGCTL=%0x\n", gotgctl.d32);
+       }
+}
+
+/**
+ * Tasklet
+ *
+ */
+extern void start_next_request(dwc_otg_pcd_ep_t * ep);
+
+static void start_xfer_tasklet_func(void *data)
+{
+       dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) data;
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+
+       int i;
+       depctl_data_t diepctl;
+
+       DWC_DEBUGPL(DBG_PCDV, "Start xfer tasklet\n");
+
+       diepctl.d32 = DWC_READ_REG32(&core_if->dev_if->in_ep_regs[0]->diepctl);
+
+       if (pcd->ep0.queue_sof) {
+               pcd->ep0.queue_sof = 0;
+               start_next_request(&pcd->ep0);
+               // break;
+       }
+
+       for (i = 0; i < core_if->dev_if->num_in_eps; i++) {
+               depctl_data_t diepctl;
+               diepctl.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->in_ep_regs[i]->diepctl);
+
+               if (pcd->in_ep[i].queue_sof) {
+                       pcd->in_ep[i].queue_sof = 0;
+                       start_next_request(&pcd->in_ep[i]);
+                       // break;
+               }
+       }
+
+       return;
+}
+
+/**
+ * This function initialized the PCD portion of the driver.
+ *
+ */
+dwc_otg_pcd_t *dwc_otg_pcd_init(dwc_otg_device_t *otg_dev)
+{
+       struct device *dev = &otg_dev->os_dep.platformdev->dev;
+       dwc_otg_core_if_t *core_if = otg_dev->core_if;
+       dwc_otg_pcd_t *pcd = NULL;
+       dwc_otg_dev_if_t *dev_if;
+       int i;
+
+       /*
+        * Allocate PCD structure
+        */
+       pcd = DWC_ALLOC(sizeof(dwc_otg_pcd_t));
+
+       if (pcd == NULL) {
+               return NULL;
+       }
+
+#if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_SPINLOCK))
+       DWC_SPINLOCK_ALLOC_LINUX_DEBUG(pcd->lock);
+#else
+       pcd->lock = DWC_SPINLOCK_ALLOC();
+#endif
+        DWC_DEBUGPL(DBG_HCDV, "Init of PCD %p given core_if %p\n",
+                    pcd, core_if);//GRAYG
+       if (!pcd->lock) {
+               DWC_ERROR("Could not allocate lock for pcd");
+               DWC_FREE(pcd);
+               return NULL;
+       }
+       /* Set core_if's lock pointer to hcd->lock */
+       core_if->lock = pcd->lock;
+       pcd->core_if = core_if;
+
+       dev_if = core_if->dev_if;
+       dev_if->isoc_ep = NULL;
+
+       if (core_if->hwcfg4.b.ded_fifo_en) {
+               DWC_PRINTF("Dedicated Tx FIFOs mode\n");
+       } else {
+               DWC_PRINTF("Shared Tx FIFO mode\n");
+       }
+
+       /*
+        * Initialized the Core for Device mode here if there is nod ADP support.
+        * Otherwise it will be done later in dwc_otg_adp_start routine.
+        */
+       if (dwc_otg_is_device_mode(core_if) /*&& !core_if->adp_enable*/) {
+               dwc_otg_core_dev_init(core_if);
+       }
+
+       /*
+        * Register the PCD Callbacks.
+        */
+       dwc_otg_cil_register_pcd_callbacks(core_if, &pcd_callbacks, pcd);
+
+       /*
+        * Initialize the DMA buffer for SETUP packets
+        */
+       if (GET_CORE_IF(pcd)->dma_enable) {
+               pcd->setup_pkt =
+                   DWC_DMA_ALLOC(dev, sizeof(*pcd->setup_pkt) * 5,
+                                 &pcd->setup_pkt_dma_handle);
+               if (pcd->setup_pkt == NULL) {
+                       DWC_FREE(pcd);
+                       return NULL;
+               }
+
+               pcd->status_buf =
+                   DWC_DMA_ALLOC(dev, sizeof(uint16_t),
+                                 &pcd->status_buf_dma_handle);
+               if (pcd->status_buf == NULL) {
+                       DWC_DMA_FREE(dev, sizeof(*pcd->setup_pkt) * 5,
+                                    pcd->setup_pkt, pcd->setup_pkt_dma_handle);
+                       DWC_FREE(pcd);
+                       return NULL;
+               }
+
+               if (GET_CORE_IF(pcd)->dma_desc_enable) {
+                       dev_if->setup_desc_addr[0] =
+                           dwc_otg_ep_alloc_desc_chain(dev,
+                               &dev_if->dma_setup_desc_addr[0], 1);
+                       dev_if->setup_desc_addr[1] =
+                           dwc_otg_ep_alloc_desc_chain(dev,
+                               &dev_if->dma_setup_desc_addr[1], 1);
+                       dev_if->in_desc_addr =
+                           dwc_otg_ep_alloc_desc_chain(dev,
+                               &dev_if->dma_in_desc_addr, 1);
+                       dev_if->out_desc_addr =
+                           dwc_otg_ep_alloc_desc_chain(dev,
+                               &dev_if->dma_out_desc_addr, 1);
+                       pcd->data_terminated = 0;
+
+                       if (dev_if->setup_desc_addr[0] == 0
+                           || dev_if->setup_desc_addr[1] == 0
+                           || dev_if->in_desc_addr == 0
+                           || dev_if->out_desc_addr == 0) {
+
+                               if (dev_if->out_desc_addr)
+                                       dwc_otg_ep_free_desc_chain(dev,
+                                            dev_if->out_desc_addr,
+                                            dev_if->dma_out_desc_addr, 1);
+                               if (dev_if->in_desc_addr)
+                                       dwc_otg_ep_free_desc_chain(dev,
+                                            dev_if->in_desc_addr,
+                                            dev_if->dma_in_desc_addr, 1);
+                               if (dev_if->setup_desc_addr[1])
+                                       dwc_otg_ep_free_desc_chain(dev,
+                                            dev_if->setup_desc_addr[1],
+                                            dev_if->dma_setup_desc_addr[1], 1);
+                               if (dev_if->setup_desc_addr[0])
+                                       dwc_otg_ep_free_desc_chain(dev,
+                                            dev_if->setup_desc_addr[0],
+                                            dev_if->dma_setup_desc_addr[0], 1);
+
+                               DWC_DMA_FREE(dev, sizeof(*pcd->setup_pkt) * 5,
+                                            pcd->setup_pkt,
+                                            pcd->setup_pkt_dma_handle);
+                               DWC_DMA_FREE(dev, sizeof(*pcd->status_buf),
+                                            pcd->status_buf,
+                                            pcd->status_buf_dma_handle);
+
+                               DWC_FREE(pcd);
+
+                               return NULL;
+                       }
+               }
+       } else {
+               pcd->setup_pkt = DWC_ALLOC(sizeof(*pcd->setup_pkt) * 5);
+               if (pcd->setup_pkt == NULL) {
+                       DWC_FREE(pcd);
+                       return NULL;
+               }
+
+               pcd->status_buf = DWC_ALLOC(sizeof(uint16_t));
+               if (pcd->status_buf == NULL) {
+                       DWC_FREE(pcd->setup_pkt);
+                       DWC_FREE(pcd);
+                       return NULL;
+               }
+       }
+
+       dwc_otg_pcd_reinit(pcd);
+
+       /* Allocate the cfi object for the PCD */
+#ifdef DWC_UTE_CFI
+       pcd->cfi = DWC_ALLOC(sizeof(cfiobject_t));
+       if (NULL == pcd->cfi)
+               goto fail;
+       if (init_cfi(pcd->cfi)) {
+               CFI_INFO("%s: Failed to init the CFI object\n", __func__);
+               goto fail;
+       }
+#endif
+
+       /* Initialize tasklets */
+       pcd->start_xfer_tasklet = DWC_TASK_ALLOC("xfer_tasklet",
+                                                start_xfer_tasklet_func, pcd);
+       pcd->test_mode_tasklet = DWC_TASK_ALLOC("test_mode_tasklet",
+                                               do_test_mode, pcd);
+
+       /* Initialize SRP timer */
+       core_if->srp_timer = DWC_TIMER_ALLOC("SRP TIMER", srp_timeout, core_if);
+
+       if (core_if->core_params->dev_out_nak) {
+               /**
+               * Initialize xfer timeout timer. Implemented for
+               * 2.93a feature "Device DDMA OUT NAK Enhancement"
+               */
+               for(i = 0; i < MAX_EPS_CHANNELS; i++) {
+                       pcd->core_if->ep_xfer_timer[i] =
+                               DWC_TIMER_ALLOC("ep timer", ep_xfer_timeout,
+                               &pcd->core_if->ep_xfer_info[i]);
+               }
+       }
+
+       return pcd;
+#ifdef DWC_UTE_CFI
+fail:
+#endif
+       if (pcd->setup_pkt)
+               DWC_FREE(pcd->setup_pkt);
+       if (pcd->status_buf)
+               DWC_FREE(pcd->status_buf);
+#ifdef DWC_UTE_CFI
+       if (pcd->cfi)
+               DWC_FREE(pcd->cfi);
+#endif
+       if (pcd)
+               DWC_FREE(pcd);
+       return NULL;
+
+}
+
+/**
+ * Remove PCD specific data
+ */
+void dwc_otg_pcd_remove(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_dev_if_t *dev_if = GET_CORE_IF(pcd)->dev_if;
+       struct device *dev = dwc_otg_pcd_to_dev(pcd);
+       int i;
+
+       if (pcd->core_if->core_params->dev_out_nak) {
+               for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+                       DWC_TIMER_CANCEL(pcd->core_if->ep_xfer_timer[i]);
+                       pcd->core_if->ep_xfer_info[i].state = 0;
+               }
+       }
+
+       if (GET_CORE_IF(pcd)->dma_enable) {
+               DWC_DMA_FREE(dev, sizeof(*pcd->setup_pkt) * 5, pcd->setup_pkt,
+                            pcd->setup_pkt_dma_handle);
+               DWC_DMA_FREE(dev, sizeof(uint16_t), pcd->status_buf,
+                            pcd->status_buf_dma_handle);
+               if (GET_CORE_IF(pcd)->dma_desc_enable) {
+                       dwc_otg_ep_free_desc_chain(dev,
+                                                  dev_if->setup_desc_addr[0],
+                                                  dev_if->dma_setup_desc_addr
+                                                  [0], 1);
+                       dwc_otg_ep_free_desc_chain(dev,
+                                                  dev_if->setup_desc_addr[1],
+                                                  dev_if->dma_setup_desc_addr
+                                                  [1], 1);
+                       dwc_otg_ep_free_desc_chain(dev,
+                                                  dev_if->in_desc_addr,
+                                                  dev_if->dma_in_desc_addr, 1);
+                       dwc_otg_ep_free_desc_chain(dev,
+                                                  dev_if->out_desc_addr,
+                                                  dev_if->dma_out_desc_addr,
+                                                  1);
+               }
+       } else {
+               DWC_FREE(pcd->setup_pkt);
+               DWC_FREE(pcd->status_buf);
+       }
+       DWC_SPINLOCK_FREE(pcd->lock);
+       /* Set core_if's lock pointer to NULL */
+       pcd->core_if->lock = NULL;
+
+       DWC_TASK_FREE(pcd->start_xfer_tasklet);
+       DWC_TASK_FREE(pcd->test_mode_tasklet);
+       if (pcd->core_if->core_params->dev_out_nak) {
+               for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+                       if (pcd->core_if->ep_xfer_timer[i]) {
+                                       DWC_TIMER_FREE(pcd->core_if->ep_xfer_timer[i]);
+                       }
+               }
+       }
+
+/* Release the CFI object's dynamic memory */
+#ifdef DWC_UTE_CFI
+       if (pcd->cfi->ops.release) {
+               pcd->cfi->ops.release(pcd->cfi);
+       }
+#endif
+
+       DWC_FREE(pcd);
+}
+
+/**
+ * Returns whether registered pcd is dual speed or not
+ */
+uint32_t dwc_otg_pcd_is_dualspeed(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+
+       if ((core_if->core_params->speed == DWC_SPEED_PARAM_FULL) ||
+           ((core_if->hwcfg2.b.hs_phy_type == 2) &&
+            (core_if->hwcfg2.b.fs_phy_type == 1) &&
+            (core_if->core_params->ulpi_fs_ls))) {
+               return 0;
+       }
+
+       return 1;
+}
+
+/**
+ * Returns whether registered pcd is OTG capable or not
+ */
+uint32_t dwc_otg_pcd_is_otg(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       gusbcfg_data_t usbcfg = {.d32 = 0 };
+
+       usbcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->gusbcfg);
+       if (!usbcfg.b.srpcap || !usbcfg.b.hnpcap) {
+               return 0;
+       }
+
+       return 1;
+}
+
+/**
+ * This function assigns periodic Tx FIFO to an periodic EP
+ * in shared Tx FIFO mode
+ */
+static uint32_t assign_tx_fifo(dwc_otg_core_if_t * core_if)
+{
+       uint32_t TxMsk = 1;
+       int i;
+
+       for (i = 0; i < core_if->hwcfg4.b.num_in_eps; ++i) {
+               if ((TxMsk & core_if->tx_msk) == 0) {
+                       core_if->tx_msk |= TxMsk;
+                       return i + 1;
+               }
+               TxMsk <<= 1;
+       }
+       return 0;
+}
+
+/**
+ * This function assigns periodic Tx FIFO to an periodic EP
+ * in shared Tx FIFO mode
+ */
+static uint32_t assign_perio_tx_fifo(dwc_otg_core_if_t * core_if)
+{
+       uint32_t PerTxMsk = 1;
+       int i;
+       for (i = 0; i < core_if->hwcfg4.b.num_dev_perio_in_ep; ++i) {
+               if ((PerTxMsk & core_if->p_tx_msk) == 0) {
+                       core_if->p_tx_msk |= PerTxMsk;
+                       return i + 1;
+               }
+               PerTxMsk <<= 1;
+       }
+       return 0;
+}
+
+/**
+ * This function releases periodic Tx FIFO
+ * in shared Tx FIFO mode
+ */
+static void release_perio_tx_fifo(dwc_otg_core_if_t * core_if,
+                                 uint32_t fifo_num)
+{
+       core_if->p_tx_msk =
+           (core_if->p_tx_msk & (1 << (fifo_num - 1))) ^ core_if->p_tx_msk;
+}
+
+/**
+ * This function releases periodic Tx FIFO
+ * in shared Tx FIFO mode
+ */
+static void release_tx_fifo(dwc_otg_core_if_t * core_if, uint32_t fifo_num)
+{
+       core_if->tx_msk =
+           (core_if->tx_msk & (1 << (fifo_num - 1))) ^ core_if->tx_msk;
+}
+
+/**
+ * This function is being called from gadget
+ * to enable PCD endpoint.
+ */
+int dwc_otg_pcd_ep_enable(dwc_otg_pcd_t * pcd,
+                         const uint8_t * ep_desc, void *usb_ep)
+{
+       int num, dir;
+       dwc_otg_pcd_ep_t *ep = NULL;
+       const usb_endpoint_descriptor_t *desc;
+       dwc_irqflags_t flags;
+       fifosize_data_t dptxfsiz = {.d32 = 0 };
+       gdfifocfg_data_t gdfifocfg = {.d32 = 0 };
+       gdfifocfg_data_t gdfifocfgbase = {.d32 = 0 };
+       int retval = 0;
+       int i, epcount;
+       struct device *dev = dwc_otg_pcd_to_dev(pcd);
+
+       desc = (const usb_endpoint_descriptor_t *)ep_desc;
+
+       if (!desc) {
+               pcd->ep0.priv = usb_ep;
+               ep = &pcd->ep0;
+               retval = -DWC_E_INVALID;
+               goto out;
+       }
+
+       num = UE_GET_ADDR(desc->bEndpointAddress);
+       dir = UE_GET_DIR(desc->bEndpointAddress);
+
+       if (!desc->wMaxPacketSize) {
+               DWC_WARN("bad maxpacketsize\n");
+               retval = -DWC_E_INVALID;
+               goto out;
+       }
+
+       if (dir == UE_DIR_IN) {
+               epcount = pcd->core_if->dev_if->num_in_eps;
+               for (i = 0; i < epcount; i++) {
+                       if (num == pcd->in_ep[i].dwc_ep.num) {
+                               ep = &pcd->in_ep[i];
+                               break;
+                       }
+               }
+       } else {
+               epcount = pcd->core_if->dev_if->num_out_eps;
+               for (i = 0; i < epcount; i++) {
+                       if (num == pcd->out_ep[i].dwc_ep.num) {
+                               ep = &pcd->out_ep[i];
+                               break;
+                       }
+               }
+       }
+
+       if (!ep) {
+               DWC_WARN("bad address\n");
+               retval = -DWC_E_INVALID;
+               goto out;
+       }
+
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+
+       ep->desc = desc;
+       ep->priv = usb_ep;
+
+       /*
+        * Activate the EP
+        */
+       ep->stopped = 0;
+
+       ep->dwc_ep.is_in = (dir == UE_DIR_IN);
+       ep->dwc_ep.maxpacket = UGETW(desc->wMaxPacketSize);
+
+       ep->dwc_ep.type = desc->bmAttributes & UE_XFERTYPE;
+
+       if (ep->dwc_ep.is_in) {
+               if (!GET_CORE_IF(pcd)->en_multiple_tx_fifo) {
+                       ep->dwc_ep.tx_fifo_num = 0;
+
+                       if (ep->dwc_ep.type == UE_ISOCHRONOUS) {
+                               /*
+                                * if ISOC EP then assign a Periodic Tx FIFO.
+                                */
+                               ep->dwc_ep.tx_fifo_num =
+                                   assign_perio_tx_fifo(GET_CORE_IF(pcd));
+                       }
+               } else {
+                       /*
+                        * if Dedicated FIFOs mode is on then assign a Tx FIFO.
+                        */
+                       ep->dwc_ep.tx_fifo_num =
+                           assign_tx_fifo(GET_CORE_IF(pcd));
+               }
+
+               /* Calculating EP info controller base address */
+               if (ep->dwc_ep.tx_fifo_num
+                   && GET_CORE_IF(pcd)->en_multiple_tx_fifo) {
+                       gdfifocfg.d32 =
+                           DWC_READ_REG32(&GET_CORE_IF(pcd)->
+                                          core_global_regs->gdfifocfg);
+                       gdfifocfgbase.d32 = gdfifocfg.d32 >> 16;
+                       dptxfsiz.d32 =
+                           (DWC_READ_REG32
+                            (&GET_CORE_IF(pcd)->core_global_regs->
+                             dtxfsiz[ep->dwc_ep.tx_fifo_num - 1]) >> 16);
+                       gdfifocfg.b.epinfobase =
+                           gdfifocfgbase.d32 + dptxfsiz.d32;
+                       if (GET_CORE_IF(pcd)->snpsid <= OTG_CORE_REV_2_94a) {
+                               DWC_WRITE_REG32(&GET_CORE_IF(pcd)->
+                                               core_global_regs->gdfifocfg,
+                                               gdfifocfg.d32);
+                       }
+               }
+       }
+       /* Set initial data PID. */
+       if (ep->dwc_ep.type == UE_BULK) {
+               ep->dwc_ep.data_pid_start = 0;
+       }
+
+       /* Alloc DMA Descriptors */
+       if (GET_CORE_IF(pcd)->dma_desc_enable) {
+#ifndef DWC_UTE_PER_IO
+               if (ep->dwc_ep.type != UE_ISOCHRONOUS) {
+#endif
+                       ep->dwc_ep.desc_addr =
+                           dwc_otg_ep_alloc_desc_chain(dev,
+                                               &ep->dwc_ep.dma_desc_addr,
+                                               MAX_DMA_DESC_CNT);
+                       if (!ep->dwc_ep.desc_addr) {
+                               DWC_WARN("%s, can't allocate DMA descriptor\n",
+                                        __func__);
+                               retval = -DWC_E_SHUTDOWN;
+                               DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+                               goto out;
+                       }
+#ifndef DWC_UTE_PER_IO
+               }
+#endif
+       }
+
+       DWC_DEBUGPL(DBG_PCD, "Activate %s: type=%d, mps=%d desc=%p\n",
+                   (ep->dwc_ep.is_in ? "IN" : "OUT"),
+                   ep->dwc_ep.type, ep->dwc_ep.maxpacket, ep->desc);
+#ifdef DWC_UTE_PER_IO
+       ep->dwc_ep.xiso_bInterval = 1 << (ep->desc->bInterval - 1);
+#endif
+       if (ep->dwc_ep.type == DWC_OTG_EP_TYPE_ISOC) {
+               ep->dwc_ep.bInterval = 1 << (ep->desc->bInterval - 1);
+               ep->dwc_ep.frame_num = 0xFFFFFFFF;
+       }
+
+       dwc_otg_ep_activate(GET_CORE_IF(pcd), &ep->dwc_ep);
+
+#ifdef DWC_UTE_CFI
+       if (pcd->cfi->ops.ep_enable) {
+               pcd->cfi->ops.ep_enable(pcd->cfi, pcd, ep);
+       }
+#endif
+
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+
+out:
+       return retval;
+}
+
+/**
+ * This function is being called from gadget
+ * to disable PCD endpoint.
+ */
+int dwc_otg_pcd_ep_disable(dwc_otg_pcd_t * pcd, void *ep_handle)
+{
+       dwc_otg_pcd_ep_t *ep;
+       dwc_irqflags_t flags;
+       dwc_otg_dev_dma_desc_t *desc_addr;
+       dwc_dma_t dma_desc_addr;
+       gdfifocfg_data_t gdfifocfgbase = {.d32 = 0 };
+       gdfifocfg_data_t gdfifocfg = {.d32 = 0 };
+       fifosize_data_t dptxfsiz = {.d32 = 0 };
+       struct device *dev = dwc_otg_pcd_to_dev(pcd);
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+
+       if (!ep || !ep->desc) {
+               DWC_DEBUGPL(DBG_PCD, "bad ep address\n");
+               return -DWC_E_INVALID;
+       }
+
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+
+       dwc_otg_request_nuke(ep);
+
+       dwc_otg_ep_deactivate(GET_CORE_IF(pcd), &ep->dwc_ep);
+       if (pcd->core_if->core_params->dev_out_nak) {
+               DWC_TIMER_CANCEL(pcd->core_if->ep_xfer_timer[ep->dwc_ep.num]);
+               pcd->core_if->ep_xfer_info[ep->dwc_ep.num].state = 0;
+       }
+       ep->desc = NULL;
+       ep->stopped = 1;
+
+       gdfifocfg.d32 =
+           DWC_READ_REG32(&GET_CORE_IF(pcd)->core_global_regs->gdfifocfg);
+       gdfifocfgbase.d32 = gdfifocfg.d32 >> 16;
+
+       if (ep->dwc_ep.is_in) {
+               if (GET_CORE_IF(pcd)->en_multiple_tx_fifo) {
+                       /* Flush the Tx FIFO */
+                       dwc_otg_flush_tx_fifo(GET_CORE_IF(pcd),
+                                             ep->dwc_ep.tx_fifo_num);
+               }
+               release_perio_tx_fifo(GET_CORE_IF(pcd), ep->dwc_ep.tx_fifo_num);
+               release_tx_fifo(GET_CORE_IF(pcd), ep->dwc_ep.tx_fifo_num);
+               if (GET_CORE_IF(pcd)->en_multiple_tx_fifo) {
+                       /* Decreasing EPinfo Base Addr */
+                       dptxfsiz.d32 =
+                           (DWC_READ_REG32
+                            (&GET_CORE_IF(pcd)->
+                               core_global_regs->dtxfsiz[ep->dwc_ep.tx_fifo_num-1]) >> 16);
+                       gdfifocfg.b.epinfobase = gdfifocfgbase.d32 - dptxfsiz.d32;
+                       if (GET_CORE_IF(pcd)->snpsid <= OTG_CORE_REV_2_94a) {
+                               DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gdfifocfg,
+                                       gdfifocfg.d32);
+                       }
+               }
+       }
+
+       /* Free DMA Descriptors */
+       if (GET_CORE_IF(pcd)->dma_desc_enable) {
+               if (ep->dwc_ep.type != UE_ISOCHRONOUS) {
+                       desc_addr = ep->dwc_ep.desc_addr;
+                       dma_desc_addr = ep->dwc_ep.dma_desc_addr;
+
+                       /* Cannot call dma_free_coherent() with IRQs disabled */
+                       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+                       dwc_otg_ep_free_desc_chain(dev, desc_addr, dma_desc_addr,
+                                                  MAX_DMA_DESC_CNT);
+
+                       goto out_unlocked;
+               }
+       }
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+
+out_unlocked:
+       DWC_DEBUGPL(DBG_PCD, "%d %s disabled\n", ep->dwc_ep.num,
+                   ep->dwc_ep.is_in ? "IN" : "OUT");
+       return 0;
+
+}
+
+/******************************************************************************/
+#ifdef DWC_UTE_PER_IO
+
+/**
+ * Free the request and its extended parts
+ *
+ */
+void dwc_pcd_xiso_ereq_free(dwc_otg_pcd_ep_t * ep, dwc_otg_pcd_request_t * req)
+{
+       DWC_FREE(req->ext_req.per_io_frame_descs);
+       DWC_FREE(req);
+}
+
+/**
+ * Start the next request in the endpoint's queue.
+ *
+ */
+int dwc_otg_pcd_xiso_start_next_request(dwc_otg_pcd_t * pcd,
+                                       dwc_otg_pcd_ep_t * ep)
+{
+       int i;
+       dwc_otg_pcd_request_t *req = NULL;
+       dwc_ep_t *dwcep = NULL;
+       struct dwc_iso_xreq_port *ereq = NULL;
+       struct dwc_iso_pkt_desc_port *ddesc_iso;
+       uint16_t nat;
+       depctl_data_t diepctl;
+
+       dwcep = &ep->dwc_ep;
+
+       if (dwcep->xiso_active_xfers > 0) {
+#if 0  //Disable this to decrease s/w overhead that is crucial for Isoc transfers
+               DWC_WARN("There are currently active transfers for EP%d \
+                               (active=%d; queued=%d)", dwcep->num, dwcep->xiso_active_xfers,
+                               dwcep->xiso_queued_xfers);
+#endif
+               return 0;
+       }
+
+       nat = UGETW(ep->desc->wMaxPacketSize);
+       nat = (nat >> 11) & 0x03;
+
+       if (!DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+               req = DWC_CIRCLEQ_FIRST(&ep->queue);
+               ereq = &req->ext_req;
+               ep->stopped = 0;
+
+               /* Get the frame number */
+               dwcep->xiso_frame_num =
+                   dwc_otg_get_frame_number(GET_CORE_IF(pcd));
+               DWC_DEBUG("FRM_NUM=%d", dwcep->xiso_frame_num);
+
+               ddesc_iso = ereq->per_io_frame_descs;
+
+               if (dwcep->is_in) {
+                       /* Setup DMA Descriptor chain for IN Isoc request */
+                       for (i = 0; i < ereq->pio_pkt_count; i++) {
+                               //if ((i % (nat + 1)) == 0)
+                               if ( i > 0 )
+                                       dwcep->xiso_frame_num =
+                                           (dwcep->xiso_bInterval +
+                                                                               dwcep->xiso_frame_num) & 0x3FFF;
+                               dwcep->desc_addr[i].buf =
+                                   req->dma + ddesc_iso[i].offset;
+                               dwcep->desc_addr[i].status.b_iso_in.txbytes =
+                                   ddesc_iso[i].length;
+                               dwcep->desc_addr[i].status.b_iso_in.framenum =
+                                   dwcep->xiso_frame_num;
+                               dwcep->desc_addr[i].status.b_iso_in.bs =
+                                   BS_HOST_READY;
+                               dwcep->desc_addr[i].status.b_iso_in.txsts = 0;
+                               dwcep->desc_addr[i].status.b_iso_in.sp =
+                                   (ddesc_iso[i].length %
+                                    dwcep->maxpacket) ? 1 : 0;
+                               dwcep->desc_addr[i].status.b_iso_in.ioc = 0;
+                               dwcep->desc_addr[i].status.b_iso_in.pid = nat + 1;
+                               dwcep->desc_addr[i].status.b_iso_in.l = 0;
+
+                               /* Process the last descriptor */
+                               if (i == ereq->pio_pkt_count - 1) {
+                                       dwcep->desc_addr[i].status.b_iso_in.ioc = 1;
+                                       dwcep->desc_addr[i].status.b_iso_in.l = 1;
+                               }
+                       }
+
+                       /* Setup and start the transfer for this endpoint */
+                       dwcep->xiso_active_xfers++;
+                       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->dev_if->
+                                       in_ep_regs[dwcep->num]->diepdma,
+                                       dwcep->dma_desc_addr);
+                       diepctl.d32 = 0;
+                       diepctl.b.epena = 1;
+                       diepctl.b.cnak = 1;
+                       DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->dev_if->
+                                        in_ep_regs[dwcep->num]->diepctl, 0,
+                                        diepctl.d32);
+               } else {
+                       /* Setup DMA Descriptor chain for OUT Isoc request */
+                       for (i = 0; i < ereq->pio_pkt_count; i++) {
+                               //if ((i % (nat + 1)) == 0)
+                               dwcep->xiso_frame_num = (dwcep->xiso_bInterval +
+                                                                               dwcep->xiso_frame_num) & 0x3FFF;
+                               dwcep->desc_addr[i].buf =
+                                   req->dma + ddesc_iso[i].offset;
+                               dwcep->desc_addr[i].status.b_iso_out.rxbytes =
+                                   ddesc_iso[i].length;
+                               dwcep->desc_addr[i].status.b_iso_out.framenum =
+                                   dwcep->xiso_frame_num;
+                               dwcep->desc_addr[i].status.b_iso_out.bs =
+                                   BS_HOST_READY;
+                               dwcep->desc_addr[i].status.b_iso_out.rxsts = 0;
+                               dwcep->desc_addr[i].status.b_iso_out.sp =
+                                   (ddesc_iso[i].length %
+                                    dwcep->maxpacket) ? 1 : 0;
+                               dwcep->desc_addr[i].status.b_iso_out.ioc = 0;
+                               dwcep->desc_addr[i].status.b_iso_out.pid = nat + 1;
+                               dwcep->desc_addr[i].status.b_iso_out.l = 0;
+
+                               /* Process the last descriptor */
+                               if (i == ereq->pio_pkt_count - 1) {
+                                       dwcep->desc_addr[i].status.b_iso_out.ioc = 1;
+                                       dwcep->desc_addr[i].status.b_iso_out.l = 1;
+                               }
+                       }
+
+                       /* Setup and start the transfer for this endpoint */
+                       dwcep->xiso_active_xfers++;
+                       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->
+                                       dev_if->out_ep_regs[dwcep->num]->
+                                       doepdma, dwcep->dma_desc_addr);
+                       diepctl.d32 = 0;
+                       diepctl.b.epena = 1;
+                       diepctl.b.cnak = 1;
+                       DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->
+                                        dev_if->out_ep_regs[dwcep->num]->
+                                        doepctl, 0, diepctl.d32);
+               }
+
+       } else {
+               ep->stopped = 1;
+       }
+
+       return 0;
+}
+
+/**
+ *     - Remove the request from the queue
+ */
+void complete_xiso_ep(dwc_otg_pcd_ep_t * ep)
+{
+       dwc_otg_pcd_request_t *req = NULL;
+       struct dwc_iso_xreq_port *ereq = NULL;
+       struct dwc_iso_pkt_desc_port *ddesc_iso = NULL;
+       dwc_ep_t *dwcep = NULL;
+       int i;
+
+       //DWC_DEBUG();
+       dwcep = &ep->dwc_ep;
+
+       /* Get the first pending request from the queue */
+       if (!DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+               req = DWC_CIRCLEQ_FIRST(&ep->queue);
+               if (!req) {
+                       DWC_PRINTF("complete_ep 0x%p, req = NULL!\n", ep);
+                       return;
+               }
+               dwcep->xiso_active_xfers--;
+               dwcep->xiso_queued_xfers--;
+               /* Remove this request from the queue */
+               DWC_CIRCLEQ_REMOVE_INIT(&ep->queue, req, queue_entry);
+       } else {
+               DWC_PRINTF("complete_ep 0x%p, ep->queue empty!\n", ep);
+               return;
+       }
+
+       ep->stopped = 1;
+       ereq = &req->ext_req;
+       ddesc_iso = ereq->per_io_frame_descs;
+
+       if (dwcep->xiso_active_xfers < 0) {
+               DWC_WARN("EP#%d (xiso_active_xfers=%d)", dwcep->num,
+                        dwcep->xiso_active_xfers);
+       }
+
+       /* Fill the Isoc descs of portable extended req from dma descriptors */
+       for (i = 0; i < ereq->pio_pkt_count; i++) {
+               if (dwcep->is_in) {     /* IN endpoints */
+                       ddesc_iso[i].actual_length = ddesc_iso[i].length -
+                           dwcep->desc_addr[i].status.b_iso_in.txbytes;
+                       ddesc_iso[i].status =
+                           dwcep->desc_addr[i].status.b_iso_in.txsts;
+               } else {        /* OUT endpoints */
+                       ddesc_iso[i].actual_length = ddesc_iso[i].length -
+                           dwcep->desc_addr[i].status.b_iso_out.rxbytes;
+                       ddesc_iso[i].status =
+                           dwcep->desc_addr[i].status.b_iso_out.rxsts;
+               }
+       }
+
+       DWC_SPINUNLOCK(ep->pcd->lock);
+
+       /* Call the completion function in the non-portable logic */
+       ep->pcd->fops->xisoc_complete(ep->pcd, ep->priv, req->priv, 0,
+                                     &req->ext_req);
+
+       DWC_SPINLOCK(ep->pcd->lock);
+
+       /* Free the request - specific freeing needed for extended request object */
+       dwc_pcd_xiso_ereq_free(ep, req);
+
+       /* Start the next request */
+       dwc_otg_pcd_xiso_start_next_request(ep->pcd, ep);
+
+       return;
+}
+
+/**
+ * Create and initialize the Isoc pkt descriptors of the extended request.
+ *
+ */
+static int dwc_otg_pcd_xiso_create_pkt_descs(dwc_otg_pcd_request_t * req,
+                                            void *ereq_nonport,
+                                            int atomic_alloc)
+{
+       struct dwc_iso_xreq_port *ereq = NULL;
+       struct dwc_iso_xreq_port *req_mapped = NULL;
+       struct dwc_iso_pkt_desc_port *ipds = NULL;      /* To be created in this function */
+       uint32_t pkt_count;
+       int i;
+
+       ereq = &req->ext_req;
+       req_mapped = (struct dwc_iso_xreq_port *)ereq_nonport;
+       pkt_count = req_mapped->pio_pkt_count;
+
+       /* Create the isoc descs */
+       if (atomic_alloc) {
+               ipds = DWC_ALLOC_ATOMIC(sizeof(*ipds) * pkt_count);
+       } else {
+               ipds = DWC_ALLOC(sizeof(*ipds) * pkt_count);
+       }
+
+       if (!ipds) {
+               DWC_ERROR("Failed to allocate isoc descriptors");
+               return -DWC_E_NO_MEMORY;
+       }
+
+       /* Initialize the extended request fields */
+       ereq->per_io_frame_descs = ipds;
+       ereq->error_count = 0;
+       ereq->pio_alloc_pkt_count = pkt_count;
+       ereq->pio_pkt_count = pkt_count;
+       ereq->tr_sub_flags = req_mapped->tr_sub_flags;
+
+       /* Init the Isoc descriptors */
+       for (i = 0; i < pkt_count; i++) {
+               ipds[i].length = req_mapped->per_io_frame_descs[i].length;
+               ipds[i].offset = req_mapped->per_io_frame_descs[i].offset;
+               ipds[i].status = req_mapped->per_io_frame_descs[i].status;      /* 0 */
+               ipds[i].actual_length =
+                   req_mapped->per_io_frame_descs[i].actual_length;
+       }
+
+       return 0;
+}
+
+static void prn_ext_request(struct dwc_iso_xreq_port *ereq)
+{
+       struct dwc_iso_pkt_desc_port *xfd = NULL;
+       int i;
+
+       DWC_DEBUG("per_io_frame_descs=%p", ereq->per_io_frame_descs);
+       DWC_DEBUG("tr_sub_flags=%d", ereq->tr_sub_flags);
+       DWC_DEBUG("error_count=%d", ereq->error_count);
+       DWC_DEBUG("pio_alloc_pkt_count=%d", ereq->pio_alloc_pkt_count);
+       DWC_DEBUG("pio_pkt_count=%d", ereq->pio_pkt_count);
+       DWC_DEBUG("res=%d", ereq->res);
+
+       for (i = 0; i < ereq->pio_pkt_count; i++) {
+               xfd = &ereq->per_io_frame_descs[0];
+               DWC_DEBUG("FD #%d", i);
+
+               DWC_DEBUG("xfd->actual_length=%d", xfd->actual_length);
+               DWC_DEBUG("xfd->length=%d", xfd->length);
+               DWC_DEBUG("xfd->offset=%d", xfd->offset);
+               DWC_DEBUG("xfd->status=%d", xfd->status);
+       }
+}
+
+/**
+ *
+ */
+int dwc_otg_pcd_xiso_ep_queue(dwc_otg_pcd_t * pcd, void *ep_handle,
+                             uint8_t * buf, dwc_dma_t dma_buf, uint32_t buflen,
+                             int zero, void *req_handle, int atomic_alloc,
+                             void *ereq_nonport)
+{
+       dwc_otg_pcd_request_t *req = NULL;
+       dwc_otg_pcd_ep_t *ep;
+       dwc_irqflags_t flags;
+       int res;
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+       if (!ep) {
+               DWC_WARN("bad ep\n");
+               return -DWC_E_INVALID;
+       }
+
+       /* We support this extension only for DDMA mode */
+       if (ep->dwc_ep.type == DWC_OTG_EP_TYPE_ISOC)
+               if (!GET_CORE_IF(pcd)->dma_desc_enable)
+                       return -DWC_E_INVALID;
+
+       /* Create a dwc_otg_pcd_request_t object */
+       if (atomic_alloc) {
+               req = DWC_ALLOC_ATOMIC(sizeof(*req));
+       } else {
+               req = DWC_ALLOC(sizeof(*req));
+       }
+
+       if (!req) {
+               return -DWC_E_NO_MEMORY;
+       }
+
+       /* Create the Isoc descs for this request which shall be the exact match
+        * of the structure sent to us from the non-portable logic */
+       res =
+           dwc_otg_pcd_xiso_create_pkt_descs(req, ereq_nonport, atomic_alloc);
+       if (res) {
+               DWC_WARN("Failed to init the Isoc descriptors");
+               DWC_FREE(req);
+               return res;
+       }
+
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+
+       DWC_CIRCLEQ_INIT_ENTRY(req, queue_entry);
+       req->buf = buf;
+       req->dma = dma_buf;
+       req->length = buflen;
+       req->sent_zlp = zero;
+       req->priv = req_handle;
+
+       //DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+       ep->dwc_ep.dma_addr = dma_buf;
+       ep->dwc_ep.start_xfer_buff = buf;
+       ep->dwc_ep.xfer_buff = buf;
+       ep->dwc_ep.xfer_len = 0;
+       ep->dwc_ep.xfer_count = 0;
+       ep->dwc_ep.sent_zlp = 0;
+       ep->dwc_ep.total_len = buflen;
+
+       /* Add this request to the tail */
+       DWC_CIRCLEQ_INSERT_TAIL(&ep->queue, req, queue_entry);
+       ep->dwc_ep.xiso_queued_xfers++;
+
+//DWC_DEBUG("CP_0");
+//DWC_DEBUG("req->ext_req.tr_sub_flags=%d", req->ext_req.tr_sub_flags);
+//prn_ext_request((struct dwc_iso_xreq_port *) ereq_nonport);
+//prn_ext_request(&req->ext_req);
+
+       //DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+
+       /* If the req->status == ASAP  then check if there is any active transfer
+        * for this endpoint. If no active transfers, then get the first entry
+        * from the queue and start that transfer
+        */
+       if (req->ext_req.tr_sub_flags == DWC_EREQ_TF_ASAP) {
+               res = dwc_otg_pcd_xiso_start_next_request(pcd, ep);
+               if (res) {
+                       DWC_WARN("Failed to start the next Isoc transfer");
+                       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+                       DWC_FREE(req);
+                       return res;
+               }
+       }
+
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+       return 0;
+}
+
+#endif
+/* END ifdef DWC_UTE_PER_IO ***************************************************/
+int dwc_otg_pcd_ep_queue(dwc_otg_pcd_t * pcd, void *ep_handle,
+                        uint8_t * buf, dwc_dma_t dma_buf, uint32_t buflen,
+                        int zero, void *req_handle, int atomic_alloc)
+{
+       struct device *dev = dwc_otg_pcd_to_dev(pcd);
+       dwc_irqflags_t flags;
+       dwc_otg_pcd_request_t *req;
+       dwc_otg_pcd_ep_t *ep;
+       uint32_t max_transfer;
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+       if (!ep || (!ep->desc && ep->dwc_ep.num != 0)) {
+               DWC_WARN("bad ep\n");
+               return -DWC_E_INVALID;
+       }
+
+       if (atomic_alloc) {
+               req = DWC_ALLOC_ATOMIC(sizeof(*req));
+       } else {
+               req = DWC_ALLOC(sizeof(*req));
+       }
+
+       if (!req) {
+               return -DWC_E_NO_MEMORY;
+       }
+       DWC_CIRCLEQ_INIT_ENTRY(req, queue_entry);
+       if (!GET_CORE_IF(pcd)->core_params->opt) {
+               if (ep->dwc_ep.num != 0) {
+                       DWC_ERROR("queue req %p, len %d buf %p\n",
+                                 req_handle, buflen, buf);
+               }
+       }
+
+       req->buf = buf;
+       req->dma = dma_buf;
+       req->length = buflen;
+       req->sent_zlp = zero;
+       req->priv = req_handle;
+       req->dw_align_buf = NULL;
+       if ((dma_buf & 0x3) && GET_CORE_IF(pcd)->dma_enable
+                       && !GET_CORE_IF(pcd)->dma_desc_enable)
+               req->dw_align_buf = DWC_DMA_ALLOC(dev, buflen,
+                                &req->dw_align_buf_dma);
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+
+       /*
+        * After adding request to the queue for IN ISOC wait for In Token Received
+        * when TX FIFO is empty interrupt and for OUT ISOC wait for OUT Token
+        * Received when EP is disabled interrupt to obtain starting microframe
+        * (odd/even) start transfer
+        */
+       if (ep->dwc_ep.type == DWC_OTG_EP_TYPE_ISOC) {
+               if (req != 0) {
+                       depctl_data_t depctl = {.d32 =
+                                   DWC_READ_REG32(&pcd->core_if->dev_if->
+                                                  in_ep_regs[ep->dwc_ep.num]->
+                                                  diepctl) };
+                       ++pcd->request_pending;
+
+                       DWC_CIRCLEQ_INSERT_TAIL(&ep->queue, req, queue_entry);
+                       if (ep->dwc_ep.is_in) {
+                               depctl.b.cnak = 1;
+                               DWC_WRITE_REG32(&pcd->core_if->dev_if->
+                                               in_ep_regs[ep->dwc_ep.num]->
+                                               diepctl, depctl.d32);
+                       }
+
+                       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+               }
+               return 0;
+       }
+
+       /*
+        * For EP0 IN without premature status, zlp is required?
+        */
+       if (ep->dwc_ep.num == 0 && ep->dwc_ep.is_in) {
+               DWC_DEBUGPL(DBG_PCDV, "%d-OUT ZLP\n", ep->dwc_ep.num);
+               //_req->zero = 1;
+       }
+
+       /* Start the transfer */
+       if (DWC_CIRCLEQ_EMPTY(&ep->queue) && !ep->stopped) {
+               /* EP0 Transfer? */
+               if (ep->dwc_ep.num == 0) {
+                       switch (pcd->ep0state) {
+                       case EP0_IN_DATA_PHASE:
+                               DWC_DEBUGPL(DBG_PCD,
+                                           "%s ep0: EP0_IN_DATA_PHASE\n",
+                                           __func__);
+                               break;
+
+                       case EP0_OUT_DATA_PHASE:
+                               DWC_DEBUGPL(DBG_PCD,
+                                           "%s ep0: EP0_OUT_DATA_PHASE\n",
+                                           __func__);
+                               if (pcd->request_config) {
+                                       /* Complete STATUS PHASE */
+                                       ep->dwc_ep.is_in = 1;
+                                       pcd->ep0state = EP0_IN_STATUS_PHASE;
+                               }
+                               break;
+
+                       case EP0_IN_STATUS_PHASE:
+                               DWC_DEBUGPL(DBG_PCD,
+                                           "%s ep0: EP0_IN_STATUS_PHASE\n",
+                                           __func__);
+                               break;
+
+                       default:
+                               DWC_DEBUGPL(DBG_ANY, "ep0: odd state %d\n",
+                                           pcd->ep0state);
+                               DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+                               return -DWC_E_SHUTDOWN;
+                       }
+
+                       ep->dwc_ep.dma_addr = dma_buf;
+                       ep->dwc_ep.start_xfer_buff = buf;
+                       ep->dwc_ep.xfer_buff = buf;
+                       ep->dwc_ep.xfer_len = buflen;
+                       ep->dwc_ep.xfer_count = 0;
+                       ep->dwc_ep.sent_zlp = 0;
+                       ep->dwc_ep.total_len = ep->dwc_ep.xfer_len;
+
+                       if (zero) {
+                               if ((ep->dwc_ep.xfer_len %
+                                    ep->dwc_ep.maxpacket == 0)
+                                   && (ep->dwc_ep.xfer_len != 0)) {
+                                       ep->dwc_ep.sent_zlp = 1;
+                               }
+
+                       }
+
+                       dwc_otg_ep0_start_transfer(GET_CORE_IF(pcd),
+                                                  &ep->dwc_ep);
+               }               // non-ep0 endpoints
+               else {
+#ifdef DWC_UTE_CFI
+                       if (ep->dwc_ep.buff_mode != BM_STANDARD) {
+                               /* store the request length */
+                               ep->dwc_ep.cfi_req_len = buflen;
+                               pcd->cfi->ops.build_descriptors(pcd->cfi, pcd,
+                                                               ep, req);
+                       } else {
+#endif
+                               max_transfer =
+                                   GET_CORE_IF(ep->pcd)->core_params->
+                                   max_transfer_size;
+
+                               /* Setup and start the Transfer */
+                               if (req->dw_align_buf){
+                                       if (ep->dwc_ep.is_in)
+                                               dwc_memcpy(req->dw_align_buf,
+                                                          buf, buflen);
+                                       ep->dwc_ep.dma_addr =
+                                           req->dw_align_buf_dma;
+                                       ep->dwc_ep.start_xfer_buff =
+                                           req->dw_align_buf;
+                                       ep->dwc_ep.xfer_buff =
+                                           req->dw_align_buf;
+                               } else {
+                                       ep->dwc_ep.dma_addr = dma_buf;
+                                       ep->dwc_ep.start_xfer_buff = buf;
+                                        ep->dwc_ep.xfer_buff = buf;
+                               }
+                               ep->dwc_ep.xfer_len = 0;
+                               ep->dwc_ep.xfer_count = 0;
+                               ep->dwc_ep.sent_zlp = 0;
+                               ep->dwc_ep.total_len = buflen;
+
+                               ep->dwc_ep.maxxfer = max_transfer;
+                               if (GET_CORE_IF(pcd)->dma_desc_enable) {
+                                       uint32_t out_max_xfer =
+                                           DDMA_MAX_TRANSFER_SIZE -
+                                           (DDMA_MAX_TRANSFER_SIZE % 4);
+                                       if (ep->dwc_ep.is_in) {
+                                               if (ep->dwc_ep.maxxfer >
+                                                   DDMA_MAX_TRANSFER_SIZE) {
+                                                       ep->dwc_ep.maxxfer =
+                                                           DDMA_MAX_TRANSFER_SIZE;
+                                               }
+                                       } else {
+                                               if (ep->dwc_ep.maxxfer >
+                                                   out_max_xfer) {
+                                                       ep->dwc_ep.maxxfer =
+                                                           out_max_xfer;
+                                               }
+                                       }
+                               }
+                               if (ep->dwc_ep.maxxfer < ep->dwc_ep.total_len) {
+                                       ep->dwc_ep.maxxfer -=
+                                           (ep->dwc_ep.maxxfer %
+                                            ep->dwc_ep.maxpacket);
+                               }
+
+                               if (zero) {
+                                       if ((ep->dwc_ep.total_len %
+                                            ep->dwc_ep.maxpacket == 0)
+                                           && (ep->dwc_ep.total_len != 0)) {
+                                               ep->dwc_ep.sent_zlp = 1;
+                                       }
+                               }
+#ifdef DWC_UTE_CFI
+                       }
+#endif
+                       dwc_otg_ep_start_transfer(GET_CORE_IF(pcd),
+                                                 &ep->dwc_ep);
+               }
+       }
+
+       if (req != 0) {
+               ++pcd->request_pending;
+               DWC_CIRCLEQ_INSERT_TAIL(&ep->queue, req, queue_entry);
+               if (ep->dwc_ep.is_in && ep->stopped
+                   && !(GET_CORE_IF(pcd)->dma_enable)) {
+                       /** @todo NGS Create a function for this. */
+                       diepmsk_data_t diepmsk = {.d32 = 0 };
+                       diepmsk.b.intktxfemp = 1;
+                       if (GET_CORE_IF(pcd)->multiproc_int_enable) {
+                               DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->
+                                                dev_if->dev_global_regs->diepeachintmsk
+                                                [ep->dwc_ep.num], 0,
+                                                diepmsk.d32);
+                       } else {
+                               DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->
+                                                dev_if->dev_global_regs->
+                                                diepmsk, 0, diepmsk.d32);
+                       }
+
+               }
+       }
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+
+       return 0;
+}
+
+int dwc_otg_pcd_ep_dequeue(dwc_otg_pcd_t * pcd, void *ep_handle,
+                          void *req_handle)
+{
+       dwc_irqflags_t flags;
+       dwc_otg_pcd_request_t *req;
+       dwc_otg_pcd_ep_t *ep;
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+       if (!ep || (!ep->desc && ep->dwc_ep.num != 0)) {
+               DWC_WARN("bad argument\n");
+               return -DWC_E_INVALID;
+       }
+
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+
+       /* make sure it's actually queued on this endpoint */
+       DWC_CIRCLEQ_FOREACH(req, &ep->queue, queue_entry) {
+               if (req->priv == (void *)req_handle) {
+                       break;
+               }
+       }
+
+       if (req->priv != (void *)req_handle) {
+               DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+               return -DWC_E_INVALID;
+       }
+
+       if (!DWC_CIRCLEQ_EMPTY_ENTRY(req, queue_entry)) {
+               dwc_otg_request_done(ep, req, -DWC_E_RESTART);
+       } else {
+               req = NULL;
+       }
+
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+
+       return req ? 0 : -DWC_E_SHUTDOWN;
+
+}
+
+/**
+ * dwc_otg_pcd_ep_wedge - sets the halt feature and ignores clear requests
+ *
+ * Use this to stall an endpoint and ignore CLEAR_FEATURE(HALT_ENDPOINT)
+ * requests. If the gadget driver clears the halt status, it will
+ * automatically unwedge the endpoint.
+ *
+ * Returns zero on success, else negative DWC error code.
+ */
+int dwc_otg_pcd_ep_wedge(dwc_otg_pcd_t * pcd, void *ep_handle)
+{
+       dwc_otg_pcd_ep_t *ep;
+       dwc_irqflags_t flags;
+       int retval = 0;
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+
+       if ((!ep->desc && ep != &pcd->ep0) ||
+           (ep->desc && (ep->desc->bmAttributes == UE_ISOCHRONOUS))) {
+               DWC_WARN("%s, bad ep\n", __func__);
+               return -DWC_E_INVALID;
+       }
+
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+       if (!DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+               DWC_WARN("%d %s XFer In process\n", ep->dwc_ep.num,
+                        ep->dwc_ep.is_in ? "IN" : "OUT");
+               retval = -DWC_E_AGAIN;
+       } else {
+                /* This code needs to be reviewed */
+               if (ep->dwc_ep.is_in == 1 && GET_CORE_IF(pcd)->dma_desc_enable) {
+                       dtxfsts_data_t txstatus;
+                       fifosize_data_t txfifosize;
+
+                       txfifosize.d32 =
+                           DWC_READ_REG32(&GET_CORE_IF(pcd)->
+                                          core_global_regs->dtxfsiz[ep->dwc_ep.
+                                                                    tx_fifo_num]);
+                       txstatus.d32 =
+                           DWC_READ_REG32(&GET_CORE_IF(pcd)->
+                                          dev_if->in_ep_regs[ep->dwc_ep.num]->
+                                          dtxfsts);
+
+                       if (txstatus.b.txfspcavail < txfifosize.b.depth) {
+                               DWC_WARN("%s() Data In Tx Fifo\n", __func__);
+                               retval = -DWC_E_AGAIN;
+                       } else {
+                               if (ep->dwc_ep.num == 0) {
+                                       pcd->ep0state = EP0_STALL;
+                               }
+
+                               ep->stopped = 1;
+                               dwc_otg_ep_set_stall(GET_CORE_IF(pcd),
+                                                    &ep->dwc_ep);
+                       }
+               } else {
+                       if (ep->dwc_ep.num == 0) {
+                               pcd->ep0state = EP0_STALL;
+                       }
+
+                       ep->stopped = 1;
+                       dwc_otg_ep_set_stall(GET_CORE_IF(pcd), &ep->dwc_ep);
+               }
+       }
+
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+
+       return retval;
+}
+
+int dwc_otg_pcd_ep_halt(dwc_otg_pcd_t * pcd, void *ep_handle, int value)
+{
+       dwc_otg_pcd_ep_t *ep;
+       dwc_irqflags_t flags;
+       int retval = 0;
+
+       ep = get_ep_from_handle(pcd, ep_handle);
+
+       if (!ep || (!ep->desc && ep != &pcd->ep0) ||
+           (ep->desc && (ep->desc->bmAttributes == UE_ISOCHRONOUS))) {
+               DWC_WARN("%s, bad ep\n", __func__);
+               return -DWC_E_INVALID;
+       }
+
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+       if (!DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+               DWC_WARN("%d %s XFer In process\n", ep->dwc_ep.num,
+                        ep->dwc_ep.is_in ? "IN" : "OUT");
+               retval = -DWC_E_AGAIN;
+       } else if (value == 0) {
+               dwc_otg_ep_clear_stall(GET_CORE_IF(pcd), &ep->dwc_ep);
+       } else if (value == 1) {
+               if (ep->dwc_ep.is_in == 1 && GET_CORE_IF(pcd)->dma_desc_enable) {
+                       dtxfsts_data_t txstatus;
+                       fifosize_data_t txfifosize;
+
+                       txfifosize.d32 =
+                           DWC_READ_REG32(&GET_CORE_IF(pcd)->core_global_regs->
+                                          dtxfsiz[ep->dwc_ep.tx_fifo_num]);
+                       txstatus.d32 =
+                           DWC_READ_REG32(&GET_CORE_IF(pcd)->dev_if->
+                                          in_ep_regs[ep->dwc_ep.num]->dtxfsts);
+
+                       if (txstatus.b.txfspcavail < txfifosize.b.depth) {
+                               DWC_WARN("%s() Data In Tx Fifo\n", __func__);
+                               retval = -DWC_E_AGAIN;
+                       } else {
+                               if (ep->dwc_ep.num == 0) {
+                                       pcd->ep0state = EP0_STALL;
+                               }
+
+                               ep->stopped = 1;
+                               dwc_otg_ep_set_stall(GET_CORE_IF(pcd),
+                                                    &ep->dwc_ep);
+                       }
+               } else {
+                       if (ep->dwc_ep.num == 0) {
+                               pcd->ep0state = EP0_STALL;
+                       }
+
+                       ep->stopped = 1;
+                       dwc_otg_ep_set_stall(GET_CORE_IF(pcd), &ep->dwc_ep);
+               }
+       } else if (value == 2) {
+               ep->dwc_ep.stall_clear_flag = 0;
+       } else if (value == 3) {
+               ep->dwc_ep.stall_clear_flag = 1;
+       }
+
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+
+       return retval;
+}
+
+/**
+ * This function initiates remote wakeup of the host from suspend state.
+ */
+void dwc_otg_pcd_rem_wkup_from_suspend(dwc_otg_pcd_t * pcd, int set)
+{
+       dctl_data_t dctl = { 0 };
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dsts_data_t dsts;
+
+       dsts.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
+       if (!dsts.b.suspsts) {
+               DWC_WARN("Remote wakeup while is not in suspend state\n");
+       }
+       /* Check if DEVICE_REMOTE_WAKEUP feature enabled */
+       if (pcd->remote_wakeup_enable) {
+               if (set) {
+
+                       if (core_if->adp_enable) {
+                               gpwrdn_data_t gpwrdn;
+
+                               dwc_otg_adp_probe_stop(core_if);
+
+                               /* Mask SRP detected interrupt from Power Down Logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.srp_det_msk = 1;
+                               DWC_MODIFY_REG32(&core_if->
+                                                core_global_regs->gpwrdn,
+                                                gpwrdn.d32, 0);
+
+                               /* Disable Power Down Logic */
+                               gpwrdn.d32 = 0;
+                               gpwrdn.b.pmuactv = 1;
+                               DWC_MODIFY_REG32(&core_if->
+                                                core_global_regs->gpwrdn,
+                                                gpwrdn.d32, 0);
+
+                               /*
+                                * Initialize the Core for Device mode.
+                                */
+                               core_if->op_state = B_PERIPHERAL;
+                               dwc_otg_core_init(core_if);
+                               dwc_otg_enable_global_interrupts(core_if);
+                               cil_pcd_start(core_if);
+
+                               dwc_otg_initiate_srp(core_if);
+                       }
+
+                       dctl.b.rmtwkupsig = 1;
+                       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->
+                                        dctl, 0, dctl.d32);
+                       DWC_DEBUGPL(DBG_PCD, "Set Remote Wakeup\n");
+
+                       dwc_mdelay(2);
+                       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->
+                                        dctl, dctl.d32, 0);
+                       DWC_DEBUGPL(DBG_PCD, "Clear Remote Wakeup\n");
+               }
+       } else {
+               DWC_DEBUGPL(DBG_PCD, "Remote Wakeup is disabled\n");
+       }
+}
+
+#ifdef CONFIG_USB_DWC_OTG_LPM
+/**
+ * This function initiates remote wakeup of the host from L1 sleep state.
+ */
+void dwc_otg_pcd_rem_wkup_from_sleep(dwc_otg_pcd_t * pcd, int set)
+{
+       glpmcfg_data_t lpmcfg;
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+
+       /* Check if we are in L1 state */
+       if (!lpmcfg.b.prt_sleep_sts) {
+               DWC_DEBUGPL(DBG_PCD, "Device is not in sleep state\n");
+               return;
+       }
+
+       /* Check if host allows remote wakeup */
+       if (!lpmcfg.b.rem_wkup_en) {
+               DWC_DEBUGPL(DBG_PCD, "Host does not allow remote wakeup\n");
+               return;
+       }
+
+       /* Check if Resume OK */
+       if (!lpmcfg.b.sleep_state_resumeok) {
+               DWC_DEBUGPL(DBG_PCD, "Sleep state resume is not OK\n");
+               return;
+       }
+
+       lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
+       lpmcfg.b.en_utmi_sleep = 0;
+       lpmcfg.b.hird_thres &= (~(1 << 4));
+       DWC_WRITE_REG32(&core_if->core_global_regs->glpmcfg, lpmcfg.d32);
+
+       if (set) {
+               dctl_data_t dctl = {.d32 = 0 };
+               dctl.b.rmtwkupsig = 1;
+               /* Set RmtWkUpSig bit to start remote wakup signaling.
+                * Hardware will automatically clear this bit.
+                */
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl,
+                                0, dctl.d32);
+               DWC_DEBUGPL(DBG_PCD, "Set Remote Wakeup\n");
+       }
+
+}
+#endif
+
+/**
+ * Performs remote wakeup.
+ */
+void dwc_otg_pcd_remote_wakeup(dwc_otg_pcd_t * pcd, int set)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_irqflags_t flags;
+       if (dwc_otg_is_device_mode(core_if)) {
+               DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+#ifdef CONFIG_USB_DWC_OTG_LPM
+               if (core_if->lx_state == DWC_OTG_L1) {
+                       dwc_otg_pcd_rem_wkup_from_sleep(pcd, set);
+               } else {
+#endif
+                       dwc_otg_pcd_rem_wkup_from_suspend(pcd, set);
+#ifdef CONFIG_USB_DWC_OTG_LPM
+               }
+#endif
+               DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+       }
+       return;
+}
+
+void dwc_otg_pcd_disconnect_us(dwc_otg_pcd_t * pcd, int no_of_usecs)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dctl_data_t dctl = { 0 };
+
+       if (dwc_otg_is_device_mode(core_if)) {
+               dctl.b.sftdiscon = 1;
+               DWC_PRINTF("Soft disconnect for %d useconds\n",no_of_usecs);
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, 0, dctl.d32);
+               dwc_udelay(no_of_usecs);
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, dctl.d32,0);
+
+       } else{
+               DWC_PRINTF("NOT SUPPORTED IN HOST MODE\n");
+       }
+       return;
+
+}
+
+int dwc_otg_pcd_wakeup(dwc_otg_pcd_t * pcd)
+{
+       dsts_data_t dsts;
+       gotgctl_data_t gotgctl;
+
+       /*
+        * This function starts the Protocol if no session is in progress. If
+        * a session is already in progress, but the device is suspended,
+        * remote wakeup signaling is started.
+        */
+
+       /* Check if valid session */
+       gotgctl.d32 =
+           DWC_READ_REG32(&(GET_CORE_IF(pcd)->core_global_regs->gotgctl));
+       if (gotgctl.b.bsesvld) {
+               /* Check if suspend state */
+               dsts.d32 =
+                   DWC_READ_REG32(&
+                                  (GET_CORE_IF(pcd)->dev_if->
+                                   dev_global_regs->dsts));
+               if (dsts.b.suspsts) {
+                       dwc_otg_pcd_remote_wakeup(pcd, 1);
+               }
+       } else {
+               dwc_otg_pcd_initiate_srp(pcd);
+       }
+
+       return 0;
+
+}
+
+/**
+ * Start the SRP timer to detect when the SRP does not complete within
+ * 6 seconds.
+ *
+ * @param pcd the pcd structure.
+ */
+void dwc_otg_pcd_initiate_srp(dwc_otg_pcd_t * pcd)
+{
+       dwc_irqflags_t flags;
+       DWC_SPINLOCK_IRQSAVE(pcd->lock, &flags);
+       dwc_otg_initiate_srp(GET_CORE_IF(pcd));
+       DWC_SPINUNLOCK_IRQRESTORE(pcd->lock, flags);
+}
+
+int dwc_otg_pcd_get_frame_number(dwc_otg_pcd_t * pcd)
+{
+       return dwc_otg_get_frame_number(GET_CORE_IF(pcd));
+}
+
+int dwc_otg_pcd_is_lpm_enabled(dwc_otg_pcd_t * pcd)
+{
+       return GET_CORE_IF(pcd)->core_params->lpm_enable;
+}
+
+uint32_t get_b_hnp_enable(dwc_otg_pcd_t * pcd)
+{
+       return pcd->b_hnp_enable;
+}
+
+uint32_t get_a_hnp_support(dwc_otg_pcd_t * pcd)
+{
+       return pcd->a_hnp_support;
+}
+
+uint32_t get_a_alt_hnp_support(dwc_otg_pcd_t * pcd)
+{
+       return pcd->a_alt_hnp_support;
+}
+
+int dwc_otg_pcd_get_rmwkup_enable(dwc_otg_pcd_t * pcd)
+{
+       return pcd->remote_wakeup_enable;
+}
+
+#endif /* DWC_HOST_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_pcd.h
@@ -0,0 +1,273 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_pcd.h $
+ * $Revision: #48 $
+ * $Date: 2012/08/10 $
+ * $Change: 2047372 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_HOST_ONLY
+#if !defined(__DWC_PCD_H__)
+#define __DWC_PCD_H__
+
+#include "dwc_otg_os_dep.h"
+#include "usb.h"
+#include "dwc_otg_cil.h"
+#include "dwc_otg_pcd_if.h"
+#include "dwc_otg_driver.h"
+
+struct cfiobject;
+
+/**
+ * @file
+ *
+ * This file contains the structures, constants, and interfaces for
+ * the Perpherial Contoller Driver (PCD).
+ *
+ * The Peripheral Controller Driver (PCD) for Linux will implement the
+ * Gadget API, so that the existing Gadget drivers can be used. For
+ * the Mass Storage Function driver the File-backed USB Storage Gadget
+ * (FBS) driver will be used.  The FBS driver supports the
+ * Control-Bulk (CB), Control-Bulk-Interrupt (CBI), and Bulk-Only
+ * transports.
+ *
+ */
+
+/** Invalid DMA Address */
+#define DWC_DMA_ADDR_INVALID   (~(dwc_dma_t)0)
+
+/** Max Transfer size for any EP */
+#define DDMA_MAX_TRANSFER_SIZE 65535
+
+/**
+ * Get the pointer to the core_if from the pcd pointer.
+ */
+#define GET_CORE_IF( _pcd ) (_pcd->core_if)
+
+/**
+ * States of EP0.
+ */
+typedef enum ep0_state {
+       EP0_DISCONNECT,         /* no host */
+       EP0_IDLE,
+       EP0_IN_DATA_PHASE,
+       EP0_OUT_DATA_PHASE,
+       EP0_IN_STATUS_PHASE,
+       EP0_OUT_STATUS_PHASE,
+       EP0_STALL,
+} ep0state_e;
+
+/** Fordward declaration.*/
+struct dwc_otg_pcd;
+
+/** DWC_otg iso request structure.
+ *
+ */
+typedef struct usb_iso_request dwc_otg_pcd_iso_request_t;
+
+#ifdef DWC_UTE_PER_IO
+
+/**
+ * This shall be the exact analogy of the same type structure defined in the
+ * usb_gadget.h. Each descriptor contains
+ */
+struct dwc_iso_pkt_desc_port {
+       uint32_t offset;
+       uint32_t length;        /* expected length */
+       uint32_t actual_length;
+       uint32_t status;
+};
+
+struct dwc_iso_xreq_port {
+       /** transfer/submission flag */
+       uint32_t tr_sub_flags;
+       /** Start the request ASAP */
+#define DWC_EREQ_TF_ASAP               0x00000002
+       /** Just enqueue the request w/o initiating a transfer */
+#define DWC_EREQ_TF_ENQUEUE            0x00000004
+
+       /**
+       * count of ISO packets attached to this request - shall
+       * not exceed the pio_alloc_pkt_count
+       */
+       uint32_t pio_pkt_count;
+       /** count of ISO packets allocated for this request */
+       uint32_t pio_alloc_pkt_count;
+       /** number of ISO packet errors */
+       uint32_t error_count;
+       /** reserved for future extension */
+       uint32_t res;
+       /** Will be allocated and freed in the UTE gadget and based on the CFC value */
+       struct dwc_iso_pkt_desc_port *per_io_frame_descs;
+};
+#endif
+/** DWC_otg request structure.
+ * This structure is a list of requests.
+ */
+typedef struct dwc_otg_pcd_request {
+       void *priv;
+       void *buf;
+       dwc_dma_t dma;
+       uint32_t length;
+       uint32_t actual;
+       unsigned sent_zlp:1;
+    /**
+     * Used instead of original buffer if
+     * it(physical address) is not dword-aligned.
+     **/
+     uint8_t *dw_align_buf;
+     dwc_dma_t dw_align_buf_dma;
+
+        DWC_CIRCLEQ_ENTRY(dwc_otg_pcd_request) queue_entry;
+#ifdef DWC_UTE_PER_IO
+       struct dwc_iso_xreq_port ext_req;
+       //void *priv_ereq_nport; /*  */
+#endif
+} dwc_otg_pcd_request_t;
+
+DWC_CIRCLEQ_HEAD(req_list, dwc_otg_pcd_request);
+
+/**      PCD EP structure.
+ * This structure describes an EP, there is an array of EPs in the PCD
+ * structure.
+ */
+typedef struct dwc_otg_pcd_ep {
+       /** USB EP Descriptor */
+       const usb_endpoint_descriptor_t *desc;
+
+       /** queue of dwc_otg_pcd_requests. */
+       struct req_list queue;
+       unsigned stopped:1;
+       unsigned disabling:1;
+       unsigned dma:1;
+       unsigned queue_sof:1;
+
+#ifdef DWC_EN_ISOC
+       /** ISOC req handle passed */
+       void *iso_req_handle;
+#endif                         //_EN_ISOC_
+
+       /** DWC_otg ep data. */
+       dwc_ep_t dwc_ep;
+
+       /** Pointer to PCD */
+       struct dwc_otg_pcd *pcd;
+
+       void *priv;
+} dwc_otg_pcd_ep_t;
+
+/** DWC_otg PCD Structure.
+ * This structure encapsulates the data for the dwc_otg PCD.
+ */
+struct dwc_otg_pcd {
+       const struct dwc_otg_pcd_function_ops *fops;
+       /** The DWC otg device pointer */
+       struct dwc_otg_device *otg_dev;
+       /** Core Interface */
+       dwc_otg_core_if_t *core_if;
+       /** State of EP0 */
+       ep0state_e ep0state;
+       /** EP0 Request is pending */
+       unsigned ep0_pending:1;
+       /** Indicates when SET CONFIGURATION Request is in process */
+       unsigned request_config:1;
+       /** The state of the Remote Wakeup Enable. */
+       unsigned remote_wakeup_enable:1;
+       /** The state of the B-Device HNP Enable. */
+       unsigned b_hnp_enable:1;
+       /** The state of A-Device HNP Support. */
+       unsigned a_hnp_support:1;
+       /** The state of the A-Device Alt HNP support. */
+       unsigned a_alt_hnp_support:1;
+       /** Count of pending Requests */
+       unsigned request_pending;
+
+       /** SETUP packet for EP0
+        * This structure is allocated as a DMA buffer on PCD initialization
+        * with enough space for up to 3 setup packets.
+        */
+       union {
+               usb_device_request_t req;
+               uint32_t d32[2];
+       } *setup_pkt;
+
+       dwc_dma_t setup_pkt_dma_handle;
+
+       /* Additional buffer and flag for CTRL_WR premature case */
+       uint8_t *backup_buf;
+       unsigned data_terminated;
+
+       /** 2-byte dma buffer used to return status from GET_STATUS */
+       uint16_t *status_buf;
+       dwc_dma_t status_buf_dma_handle;
+
+       /** EP0 */
+       dwc_otg_pcd_ep_t ep0;
+
+       /** Array of IN EPs. */
+       dwc_otg_pcd_ep_t in_ep[MAX_EPS_CHANNELS - 1];
+       /** Array of OUT EPs. */
+       dwc_otg_pcd_ep_t out_ep[MAX_EPS_CHANNELS - 1];
+       /** number of valid EPs in the above array. */
+//        unsigned      num_eps : 4;
+       dwc_spinlock_t *lock;
+
+       /** Tasklet to defer starting of TEST mode transmissions until
+        *      Status Phase has been completed.
+        */
+       dwc_tasklet_t *test_mode_tasklet;
+
+       /** Tasklet to delay starting of xfer in DMA mode */
+       dwc_tasklet_t *start_xfer_tasklet;
+
+       /** The test mode to enter when the tasklet is executed. */
+       unsigned test_mode;
+       /** The cfi_api structure that implements most of the CFI API
+        * and OTG specific core configuration functionality
+        */
+#ifdef DWC_UTE_CFI
+       struct cfiobject *cfi;
+#endif
+
+};
+
+static inline struct device *dwc_otg_pcd_to_dev(struct dwc_otg_pcd *pcd)
+{
+       return &pcd->otg_dev->os_dep.platformdev->dev;
+}
+
+//FIXME this functions should be static, and this prototypes should be removed
+extern void dwc_otg_request_nuke(dwc_otg_pcd_ep_t * ep);
+extern void dwc_otg_request_done(dwc_otg_pcd_ep_t * ep,
+                                dwc_otg_pcd_request_t * req, int32_t status);
+
+void dwc_otg_iso_buffer_done(dwc_otg_pcd_t * pcd, dwc_otg_pcd_ep_t * ep,
+                            void *req_handle);
+
+extern void do_test_mode(void *data);
+#endif
+#endif /* DWC_HOST_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_pcd_if.h
@@ -0,0 +1,361 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_pcd_if.h $
+ * $Revision: #11 $
+ * $Date: 2011/10/26 $
+ * $Change: 1873028 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_HOST_ONLY
+
+#if !defined(__DWC_PCD_IF_H__)
+#define __DWC_PCD_IF_H__
+
+//#include "dwc_os.h"
+#include "dwc_otg_core_if.h"
+#include "dwc_otg_driver.h"
+
+/** @file
+ * This file defines DWC_OTG PCD Core API.
+ */
+
+struct dwc_otg_pcd;
+typedef struct dwc_otg_pcd dwc_otg_pcd_t;
+
+/** Maxpacket size for EP0 */
+#define MAX_EP0_SIZE   64
+/** Maxpacket size for any EP */
+#define MAX_PACKET_SIZE 1024
+
+/** @name Function Driver Callbacks */
+/** @{ */
+
+/** This function will be called whenever a previously queued request has
+ * completed.  The status value will be set to -DWC_E_SHUTDOWN to indicated a
+ * failed or aborted transfer, or -DWC_E_RESTART to indicate the device was reset,
+ * or -DWC_E_TIMEOUT to indicate it timed out, or -DWC_E_INVALID to indicate invalid
+ * parameters. */
+typedef int (*dwc_completion_cb_t) (dwc_otg_pcd_t * pcd, void *ep_handle,
+                                   void *req_handle, int32_t status,
+                                   uint32_t actual);
+/**
+ * This function will be called whenever a previousle queued ISOC request has
+ * completed. Count of ISOC packets could be read using dwc_otg_pcd_get_iso_packet_count
+ * function.
+ * The status of each ISOC packet could be read using dwc_otg_pcd_get_iso_packet_*
+ * functions.
+ */
+typedef int (*dwc_isoc_completion_cb_t) (dwc_otg_pcd_t * pcd, void *ep_handle,
+                                        void *req_handle, int proc_buf_num);
+/** This function should handle any SETUP request that cannot be handled by the
+ * PCD Core.  This includes most GET_DESCRIPTORs, SET_CONFIGS, Any
+ * class-specific requests, etc.  The function must non-blocking.
+ *
+ * Returns 0 on success.
+ * Returns -DWC_E_NOT_SUPPORTED if the request is not supported.
+ * Returns -DWC_E_INVALID if the setup request had invalid parameters or bytes.
+ * Returns -DWC_E_SHUTDOWN on any other error. */
+typedef int (*dwc_setup_cb_t) (dwc_otg_pcd_t * pcd, uint8_t * bytes);
+/** This is called whenever the device has been disconnected.  The function
+ * driver should take appropriate action to clean up all pending requests in the
+ * PCD Core, remove all endpoints (except ep0), and initialize back to reset
+ * state. */
+typedef int (*dwc_disconnect_cb_t) (dwc_otg_pcd_t * pcd);
+/** This function is called when device has been connected. */
+typedef int (*dwc_connect_cb_t) (dwc_otg_pcd_t * pcd, int speed);
+/** This function is called when device has been suspended */
+typedef int (*dwc_suspend_cb_t) (dwc_otg_pcd_t * pcd);
+/** This function is called when device has received LPM tokens, i.e.
+ * device has been sent to sleep state. */
+typedef int (*dwc_sleep_cb_t) (dwc_otg_pcd_t * pcd);
+/** This function is called when device has been resumed
+ * from suspend(L2) or L1 sleep state. */
+typedef int (*dwc_resume_cb_t) (dwc_otg_pcd_t * pcd);
+/** This function is called whenever hnp params has been changed.
+ * User can call get_b_hnp_enable, get_a_hnp_support, get_a_alt_hnp_support functions
+ * to get hnp parameters. */
+typedef int (*dwc_hnp_params_changed_cb_t) (dwc_otg_pcd_t * pcd);
+/** This function is called whenever USB RESET is detected. */
+typedef int (*dwc_reset_cb_t) (dwc_otg_pcd_t * pcd);
+
+typedef int (*cfi_setup_cb_t) (dwc_otg_pcd_t * pcd, void *ctrl_req_bytes);
+
+/**
+ *
+ * @param ep_handle    Void pointer to the usb_ep structure
+ * @param ereq_port Pointer to the extended request structure created in the
+ *                                     portable part.
+ */
+typedef int (*xiso_completion_cb_t) (dwc_otg_pcd_t * pcd, void *ep_handle,
+                                    void *req_handle, int32_t status,
+                                    void *ereq_port);
+/** Function Driver Ops Data Structure */
+struct dwc_otg_pcd_function_ops {
+       dwc_connect_cb_t connect;
+       dwc_disconnect_cb_t disconnect;
+       dwc_setup_cb_t setup;
+       dwc_completion_cb_t complete;
+       dwc_isoc_completion_cb_t isoc_complete;
+       dwc_suspend_cb_t suspend;
+       dwc_sleep_cb_t sleep;
+       dwc_resume_cb_t resume;
+       dwc_reset_cb_t reset;
+       dwc_hnp_params_changed_cb_t hnp_changed;
+       cfi_setup_cb_t cfi_setup;
+#ifdef DWC_UTE_PER_IO
+       xiso_completion_cb_t xisoc_complete;
+#endif
+};
+/** @} */
+
+/** @name Function Driver Functions */
+/** @{ */
+
+/** Call this function to get pointer on dwc_otg_pcd_t,
+ * this pointer will be used for all PCD API functions.
+ *
+ * @param core_if The DWC_OTG Core
+ */
+extern dwc_otg_pcd_t *dwc_otg_pcd_init(dwc_otg_device_t *otg_dev);
+
+/** Frees PCD allocated by dwc_otg_pcd_init
+ *
+ * @param pcd The PCD
+ */
+extern void dwc_otg_pcd_remove(dwc_otg_pcd_t * pcd);
+
+/** Call this to bind the function driver to the PCD Core.
+ *
+ * @param pcd Pointer on dwc_otg_pcd_t returned by dwc_otg_pcd_init function.
+ * @param fops The Function Driver Ops data structure containing pointers to all callbacks.
+ */
+extern void dwc_otg_pcd_start(dwc_otg_pcd_t * pcd,
+                             const struct dwc_otg_pcd_function_ops *fops);
+
+/** Enables an endpoint for use.  This function enables an endpoint in
+ * the PCD.  The endpoint is described by the ep_desc which has the
+ * same format as a USB ep descriptor.  The ep_handle parameter is used to refer
+ * to the endpoint from other API functions and in callbacks.  Normally this
+ * should be called after a SET_CONFIGURATION/SET_INTERFACE to configure the
+ * core for that interface.
+ *
+ * Returns -DWC_E_INVALID if invalid parameters were passed.
+ * Returns -DWC_E_SHUTDOWN if any other error ocurred.
+ * Returns 0 on success.
+ *
+ * @param pcd The PCD
+ * @param ep_desc Endpoint descriptor
+ * @param usb_ep Handle on endpoint, that will be used to identify endpoint.
+ */
+extern int dwc_otg_pcd_ep_enable(dwc_otg_pcd_t * pcd,
+                                const uint8_t * ep_desc, void *usb_ep);
+
+/** Disable the endpoint referenced by ep_handle.
+ *
+ * Returns -DWC_E_INVALID if invalid parameters were passed.
+ * Returns -DWC_E_SHUTDOWN if any other error occurred.
+ * Returns 0 on success. */
+extern int dwc_otg_pcd_ep_disable(dwc_otg_pcd_t * pcd, void *ep_handle);
+
+/** Queue a data transfer request on the endpoint referenced by ep_handle.
+ * After the transfer is completes, the complete callback will be called with
+ * the request status.
+ *
+ * @param pcd The PCD
+ * @param ep_handle The handle of the endpoint
+ * @param buf The buffer for the data
+ * @param dma_buf The DMA buffer for the data
+ * @param buflen The length of the data transfer
+ * @param zero Specifies whether to send zero length last packet.
+ * @param req_handle Set this handle to any value to use to reference this
+ * request in the ep_dequeue function or from the complete callback
+ * @param atomic_alloc If driver need to perform atomic allocations
+ * for internal data structures.
+ *
+ * Returns -DWC_E_INVALID if invalid parameters were passed.
+ * Returns -DWC_E_SHUTDOWN if any other error ocurred.
+ * Returns 0 on success. */
+extern int dwc_otg_pcd_ep_queue(dwc_otg_pcd_t * pcd, void *ep_handle,
+                               uint8_t * buf, dwc_dma_t dma_buf,
+                               uint32_t buflen, int zero, void *req_handle,
+                               int atomic_alloc);
+#ifdef DWC_UTE_PER_IO
+/**
+ *
+ * @param ereq_nonport Pointer to the extended request part of the
+ *                                             usb_request structure defined in usb_gadget.h file.
+ */
+extern int dwc_otg_pcd_xiso_ep_queue(dwc_otg_pcd_t * pcd, void *ep_handle,
+                                    uint8_t * buf, dwc_dma_t dma_buf,
+                                    uint32_t buflen, int zero,
+                                    void *req_handle, int atomic_alloc,
+                                    void *ereq_nonport);
+
+#endif
+
+/** De-queue the specified data transfer that has not yet completed.
+ *
+ * Returns -DWC_E_INVALID if invalid parameters were passed.
+ * Returns -DWC_E_SHUTDOWN if any other error ocurred.
+ * Returns 0 on success. */
+extern int dwc_otg_pcd_ep_dequeue(dwc_otg_pcd_t * pcd, void *ep_handle,
+                                 void *req_handle);
+
+/** Halt (STALL) an endpoint or clear it.
+ *
+ * Returns -DWC_E_INVALID if invalid parameters were passed.
+ * Returns -DWC_E_SHUTDOWN if any other error ocurred.
+ * Returns -DWC_E_AGAIN if the STALL cannot be sent and must be tried again later
+ * Returns 0 on success. */
+extern int dwc_otg_pcd_ep_halt(dwc_otg_pcd_t * pcd, void *ep_handle, int value);
+
+/** This function */
+extern int dwc_otg_pcd_ep_wedge(dwc_otg_pcd_t * pcd, void *ep_handle);
+
+/** This function should be called on every hardware interrupt */
+extern int32_t dwc_otg_pcd_handle_intr(dwc_otg_pcd_t * pcd);
+
+/** This function returns current frame number */
+extern int dwc_otg_pcd_get_frame_number(dwc_otg_pcd_t * pcd);
+
+/**
+ * Start isochronous transfers on the endpoint referenced by ep_handle.
+ * For isochronous transfers duble buffering is used.
+ * After processing each of buffers comlete callback will be called with
+ * status for each transaction.
+ *
+ * @param pcd The PCD
+ * @param ep_handle The handle of the endpoint
+ * @param buf0 The virtual address of first data buffer
+ * @param buf1 The virtual address of second data buffer
+ * @param dma0 The DMA address of first data buffer
+ * @param dma1 The DMA address of second data buffer
+ * @param sync_frame Data pattern frame number
+ * @param dp_frame Data size for pattern frame
+ * @param data_per_frame Data size for regular frame
+ * @param start_frame Frame number to start transfers, if -1 then start transfers ASAP.
+ * @param buf_proc_intrvl Interval of ISOC Buffer processing
+ * @param req_handle Handle of ISOC request
+ * @param atomic_alloc Specefies whether to perform atomic allocation for
+ *                     internal data structures.
+ *
+ * Returns -DWC_E_NO_MEMORY if there is no enough memory.
+ * Returns -DWC_E_INVALID if incorrect arguments are passed to the function.
+ * Returns -DW_E_SHUTDOWN for any other error.
+ * Returns 0 on success
+ */
+extern int dwc_otg_pcd_iso_ep_start(dwc_otg_pcd_t * pcd, void *ep_handle,
+                                   uint8_t * buf0, uint8_t * buf1,
+                                   dwc_dma_t dma0, dwc_dma_t dma1,
+                                   int sync_frame, int dp_frame,
+                                   int data_per_frame, int start_frame,
+                                   int buf_proc_intrvl, void *req_handle,
+                                   int atomic_alloc);
+
+/** Stop ISOC transfers on endpoint referenced by ep_handle.
+ *
+ * @param pcd The PCD
+ * @param ep_handle The handle of the endpoint
+ * @param req_handle Handle of ISOC request
+ *
+ * Returns -DWC_E_INVALID if incorrect arguments are passed to the function
+ * Returns 0 on success
+ */
+int dwc_otg_pcd_iso_ep_stop(dwc_otg_pcd_t * pcd, void *ep_handle,
+                           void *req_handle);
+
+/** Get ISOC packet status.
+ *
+ * @param pcd The PCD
+ * @param ep_handle The handle of the endpoint
+ * @param iso_req_handle Isochronoush request handle
+ * @param packet Number of packet
+ * @param status Out parameter for returning status
+ * @param actual Out parameter for returning actual length
+ * @param offset Out parameter for returning offset
+ *
+ */
+extern void dwc_otg_pcd_get_iso_packet_params(dwc_otg_pcd_t * pcd,
+                                             void *ep_handle,
+                                             void *iso_req_handle, int packet,
+                                             int *status, int *actual,
+                                             int *offset);
+
+/** Get ISOC packet count.
+ *
+ * @param pcd The PCD
+ * @param ep_handle The handle of the endpoint
+ * @param iso_req_handle
+ */
+extern int dwc_otg_pcd_get_iso_packet_count(dwc_otg_pcd_t * pcd,
+                                           void *ep_handle,
+                                           void *iso_req_handle);
+
+/** This function starts the SRP Protocol if no session is in progress. If
+ * a session is already in progress, but the device is suspended,
+ * remote wakeup signaling is started.
+ */
+extern int dwc_otg_pcd_wakeup(dwc_otg_pcd_t * pcd);
+
+/** This function returns 1 if LPM support is enabled, and 0 otherwise. */
+extern int dwc_otg_pcd_is_lpm_enabled(dwc_otg_pcd_t * pcd);
+
+/** This function returns 1 if remote wakeup is allowed and 0, otherwise. */
+extern int dwc_otg_pcd_get_rmwkup_enable(dwc_otg_pcd_t * pcd);
+
+/** Initiate SRP */
+extern void dwc_otg_pcd_initiate_srp(dwc_otg_pcd_t * pcd);
+
+/** Starts remote wakeup signaling. */
+extern void dwc_otg_pcd_remote_wakeup(dwc_otg_pcd_t * pcd, int set);
+
+/** Starts micorsecond soft disconnect. */
+extern void dwc_otg_pcd_disconnect_us(dwc_otg_pcd_t * pcd, int no_of_usecs);
+/** This function returns whether device is dualspeed.*/
+extern uint32_t dwc_otg_pcd_is_dualspeed(dwc_otg_pcd_t * pcd);
+
+/** This function returns whether device is otg. */
+extern uint32_t dwc_otg_pcd_is_otg(dwc_otg_pcd_t * pcd);
+
+/** These functions allow to get hnp parameters */
+extern uint32_t get_b_hnp_enable(dwc_otg_pcd_t * pcd);
+extern uint32_t get_a_hnp_support(dwc_otg_pcd_t * pcd);
+extern uint32_t get_a_alt_hnp_support(dwc_otg_pcd_t * pcd);
+
+/** CFI specific Interface functions */
+/** Allocate a cfi buffer */
+extern uint8_t *cfiw_ep_alloc_buffer(dwc_otg_pcd_t * pcd, void *pep,
+                                    dwc_dma_t * addr, size_t buflen,
+                                    int flags);
+
+/******************************************************************************/
+
+/** @} */
+
+#endif                         /* __DWC_PCD_IF_H__ */
+
+#endif                         /* DWC_HOST_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_pcd_intr.c
@@ -0,0 +1,5148 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_pcd_intr.c $
+ * $Revision: #116 $
+ * $Date: 2012/08/10 $
+ * $Change: 2047372 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+#ifndef DWC_HOST_ONLY
+
+#include "dwc_otg_pcd.h"
+
+#ifdef DWC_UTE_CFI
+#include "dwc_otg_cfi.h"
+#endif
+
+#ifdef DWC_UTE_PER_IO
+extern void complete_xiso_ep(dwc_otg_pcd_ep_t * ep);
+#endif
+//#define PRINT_CFI_DMA_DESCS
+
+#define DEBUG_EP0
+
+/**
+ * This function updates OTG.
+ */
+static void dwc_otg_pcd_update_otg(dwc_otg_pcd_t * pcd, const unsigned reset)
+{
+
+       if (reset) {
+               pcd->b_hnp_enable = 0;
+               pcd->a_hnp_support = 0;
+               pcd->a_alt_hnp_support = 0;
+       }
+
+       if (pcd->fops->hnp_changed) {
+               pcd->fops->hnp_changed(pcd);
+       }
+}
+
+/** @file
+ * This file contains the implementation of the PCD Interrupt handlers.
+ *
+ * The PCD handles the device interrupts.  Many conditions can cause a
+ * device interrupt. When an interrupt occurs, the device interrupt
+ * service routine determines the cause of the interrupt and
+ * dispatches handling to the appropriate function. These interrupt
+ * handling functions are described below.
+ * All interrupt registers are processed from LSB to MSB.
+ */
+
+/**
+ * This function prints the ep0 state for debug purposes.
+ */
+static inline void print_ep0_state(dwc_otg_pcd_t * pcd)
+{
+#ifdef DEBUG
+       char str[40];
+
+       switch (pcd->ep0state) {
+       case EP0_DISCONNECT:
+               dwc_strcpy(str, "EP0_DISCONNECT");
+               break;
+       case EP0_IDLE:
+               dwc_strcpy(str, "EP0_IDLE");
+               break;
+       case EP0_IN_DATA_PHASE:
+               dwc_strcpy(str, "EP0_IN_DATA_PHASE");
+               break;
+       case EP0_OUT_DATA_PHASE:
+               dwc_strcpy(str, "EP0_OUT_DATA_PHASE");
+               break;
+       case EP0_IN_STATUS_PHASE:
+               dwc_strcpy(str, "EP0_IN_STATUS_PHASE");
+               break;
+       case EP0_OUT_STATUS_PHASE:
+               dwc_strcpy(str, "EP0_OUT_STATUS_PHASE");
+               break;
+       case EP0_STALL:
+               dwc_strcpy(str, "EP0_STALL");
+               break;
+       default:
+               dwc_strcpy(str, "EP0_INVALID");
+       }
+
+       DWC_DEBUGPL(DBG_ANY, "%s(%d)\n", str, pcd->ep0state);
+#endif
+}
+
+/**
+ * This function calculate the size of the payload in the memory
+ * for out endpoints and prints size for debug purposes(used in
+ * 2.93a DevOutNak feature).
+ */
+static inline void print_memory_payload(dwc_otg_pcd_t * pcd,  dwc_ep_t * ep)
+{
+#ifdef DEBUG
+       deptsiz_data_t deptsiz_init = {.d32 = 0 };
+       deptsiz_data_t deptsiz_updt = {.d32 = 0 };
+       int pack_num;
+       unsigned payload;
+
+       deptsiz_init.d32 = pcd->core_if->start_doeptsiz_val[ep->num];
+       deptsiz_updt.d32 =
+               DWC_READ_REG32(&pcd->core_if->dev_if->
+                                               out_ep_regs[ep->num]->doeptsiz);
+       /* Payload will be */
+       payload = deptsiz_init.b.xfersize - deptsiz_updt.b.xfersize;
+       /* Packet count is decremented every time a packet
+        * is written to the RxFIFO not in to the external memory
+        * So, if payload == 0, then it means no packet was sent to ext memory*/
+       pack_num = (!payload) ? 0 : (deptsiz_init.b.pktcnt - deptsiz_updt.b.pktcnt);
+       DWC_DEBUGPL(DBG_PCDV,
+               "Payload for EP%d-%s\n",
+               ep->num, (ep->is_in ? "IN" : "OUT"));
+       DWC_DEBUGPL(DBG_PCDV,
+               "Number of transfered bytes = 0x%08x\n", payload);
+       DWC_DEBUGPL(DBG_PCDV,
+               "Number of transfered packets = %d\n", pack_num);
+#endif
+}
+
+
+#ifdef DWC_UTE_CFI
+static inline void print_desc(struct dwc_otg_dma_desc *ddesc,
+                             const uint8_t * epname, int descnum)
+{
+       CFI_INFO
+           ("%s DMA_DESC(%d) buf=0x%08x bytes=0x%04x; sp=0x%x; l=0x%x; sts=0x%02x; bs=0x%02x\n",
+            epname, descnum, ddesc->buf, ddesc->status.b.bytes,
+            ddesc->status.b.sp, ddesc->status.b.l, ddesc->status.b.sts,
+            ddesc->status.b.bs);
+}
+#endif
+
+/**
+ * This function returns pointer to in ep struct with number ep_num
+ */
+static inline dwc_otg_pcd_ep_t *get_in_ep(dwc_otg_pcd_t * pcd, uint32_t ep_num)
+{
+       int i;
+       int num_in_eps = GET_CORE_IF(pcd)->dev_if->num_in_eps;
+       if (ep_num == 0) {
+               return &pcd->ep0;
+       } else {
+               for (i = 0; i < num_in_eps; ++i) {
+                       if (pcd->in_ep[i].dwc_ep.num == ep_num)
+                               return &pcd->in_ep[i];
+               }
+               return 0;
+       }
+}
+
+/**
+ * This function returns pointer to out ep struct with number ep_num
+ */
+static inline dwc_otg_pcd_ep_t *get_out_ep(dwc_otg_pcd_t * pcd, uint32_t ep_num)
+{
+       int i;
+       int num_out_eps = GET_CORE_IF(pcd)->dev_if->num_out_eps;
+       if (ep_num == 0) {
+               return &pcd->ep0;
+       } else {
+               for (i = 0; i < num_out_eps; ++i) {
+                       if (pcd->out_ep[i].dwc_ep.num == ep_num)
+                               return &pcd->out_ep[i];
+               }
+               return 0;
+       }
+}
+
+/**
+ * This functions gets a pointer to an EP from the wIndex address
+ * value of the control request.
+ */
+dwc_otg_pcd_ep_t *get_ep_by_addr(dwc_otg_pcd_t * pcd, u16 wIndex)
+{
+       dwc_otg_pcd_ep_t *ep;
+       uint32_t ep_num = UE_GET_ADDR(wIndex);
+
+       if (ep_num == 0) {
+               ep = &pcd->ep0;
+       } else if (UE_GET_DIR(wIndex) == UE_DIR_IN) {   /* in ep */
+               ep = &pcd->in_ep[ep_num - 1];
+       } else {
+               ep = &pcd->out_ep[ep_num - 1];
+       }
+
+       return ep;
+}
+
+/**
+ * This function checks the EP request queue, if the queue is not
+ * empty the next request is started.
+ */
+void start_next_request(dwc_otg_pcd_ep_t * ep)
+{
+       dwc_otg_pcd_request_t *req = 0;
+       uint32_t max_transfer =
+           GET_CORE_IF(ep->pcd)->core_params->max_transfer_size;
+
+#ifdef DWC_UTE_CFI
+       struct dwc_otg_pcd *pcd;
+       pcd = ep->pcd;
+#endif
+
+       if (!DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+               req = DWC_CIRCLEQ_FIRST(&ep->queue);
+
+#ifdef DWC_UTE_CFI
+               if (ep->dwc_ep.buff_mode != BM_STANDARD) {
+                       ep->dwc_ep.cfi_req_len = req->length;
+                       pcd->cfi->ops.build_descriptors(pcd->cfi, pcd, ep, req);
+               } else {
+#endif
+                       /* Setup and start the Transfer */
+                       if (req->dw_align_buf) {
+                               ep->dwc_ep.dma_addr = req->dw_align_buf_dma;
+                               ep->dwc_ep.start_xfer_buff = req->dw_align_buf;
+                               ep->dwc_ep.xfer_buff = req->dw_align_buf;
+                       } else {
+                               ep->dwc_ep.dma_addr = req->dma;
+                               ep->dwc_ep.start_xfer_buff = req->buf;
+                               ep->dwc_ep.xfer_buff = req->buf;
+                       }
+                       ep->dwc_ep.sent_zlp = 0;
+                       ep->dwc_ep.total_len = req->length;
+                       ep->dwc_ep.xfer_len = 0;
+                       ep->dwc_ep.xfer_count = 0;
+
+                       ep->dwc_ep.maxxfer = max_transfer;
+                       if (GET_CORE_IF(ep->pcd)->dma_desc_enable) {
+                               uint32_t out_max_xfer = DDMA_MAX_TRANSFER_SIZE
+                                   - (DDMA_MAX_TRANSFER_SIZE % 4);
+                               if (ep->dwc_ep.is_in) {
+                                       if (ep->dwc_ep.maxxfer >
+                                           DDMA_MAX_TRANSFER_SIZE) {
+                                               ep->dwc_ep.maxxfer =
+                                                   DDMA_MAX_TRANSFER_SIZE;
+                                       }
+                               } else {
+                                       if (ep->dwc_ep.maxxfer > out_max_xfer) {
+                                               ep->dwc_ep.maxxfer =
+                                                   out_max_xfer;
+                                       }
+                               }
+                       }
+                       if (ep->dwc_ep.maxxfer < ep->dwc_ep.total_len) {
+                               ep->dwc_ep.maxxfer -=
+                                   (ep->dwc_ep.maxxfer % ep->dwc_ep.maxpacket);
+                       }
+                       if (req->sent_zlp) {
+                               if ((ep->dwc_ep.total_len %
+                                    ep->dwc_ep.maxpacket == 0)
+                                   && (ep->dwc_ep.total_len != 0)) {
+                                       ep->dwc_ep.sent_zlp = 1;
+                               }
+
+                       }
+#ifdef DWC_UTE_CFI
+               }
+#endif
+               dwc_otg_ep_start_transfer(GET_CORE_IF(ep->pcd), &ep->dwc_ep);
+       } else if (ep->dwc_ep.type == DWC_OTG_EP_TYPE_ISOC) {
+               DWC_PRINTF("There are no more ISOC requests \n");
+               ep->dwc_ep.frame_num = 0xFFFFFFFF;
+       }
+}
+
+/**
+ * This function handles the SOF Interrupts. At this time the SOF
+ * Interrupt is disabled.
+ */
+int32_t dwc_otg_pcd_handle_sof_intr(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+
+       gintsts_data_t gintsts;
+
+       DWC_DEBUGPL(DBG_PCD, "SOF\n");
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.sofintr = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * This function handles the Rx Status Queue Level Interrupt, which
+ * indicates that there is a least one packet in the Rx FIFO.  The
+ * packets are moved from the FIFO to memory, where they will be
+ * processed when the Endpoint Interrupt Register indicates Transfer
+ * Complete or SETUP Phase Done.
+ *
+ * Repeat the following until the Rx Status Queue is empty:
+ *      -# Read the Receive Status Pop Register (GRXSTSP) to get Packet
+ *             info
+ *      -# If Receive FIFO is empty then skip to step Clear the interrupt
+ *             and exit
+ *      -# If SETUP Packet call dwc_otg_read_setup_packet to copy the
+ *             SETUP data to the buffer
+ *      -# If OUT Data Packet call dwc_otg_read_packet to copy the data
+ *             to the destination buffer
+ */
+int32_t dwc_otg_pcd_handle_rx_status_q_level_intr(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       gintmsk_data_t gintmask = {.d32 = 0 };
+       device_grxsts_data_t status;
+       dwc_otg_pcd_ep_t *ep;
+       gintsts_data_t gintsts;
+#ifdef DEBUG
+       static char *dpid_str[] = { "D0", "D2", "D1", "MDATA" };
+#endif
+
+       //DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, _pcd);
+       /* Disable the Rx Status Queue Level interrupt */
+       gintmask.b.rxstsqlvl = 1;
+       DWC_MODIFY_REG32(&global_regs->gintmsk, gintmask.d32, 0);
+
+       /* Get the Status from the top of the FIFO */
+       status.d32 = DWC_READ_REG32(&global_regs->grxstsp);
+
+       DWC_DEBUGPL(DBG_PCD, "EP:%d BCnt:%d DPID:%s "
+                   "pktsts:%x Frame:%d(0x%0x)\n",
+                   status.b.epnum, status.b.bcnt,
+                   dpid_str[status.b.dpid],
+                   status.b.pktsts, status.b.fn, status.b.fn);
+       /* Get pointer to EP structure */
+       ep = get_out_ep(pcd, status.b.epnum);
+
+       switch (status.b.pktsts) {
+       case DWC_DSTS_GOUT_NAK:
+               DWC_DEBUGPL(DBG_PCDV, "Global OUT NAK\n");
+               break;
+       case DWC_STS_DATA_UPDT:
+               DWC_DEBUGPL(DBG_PCDV, "OUT Data Packet\n");
+               if (status.b.bcnt && ep->dwc_ep.xfer_buff) {
+                       /** @todo NGS Check for buffer overflow? */
+                       dwc_otg_read_packet(core_if,
+                                           ep->dwc_ep.xfer_buff,
+                                           status.b.bcnt);
+                       ep->dwc_ep.xfer_count += status.b.bcnt;
+                       ep->dwc_ep.xfer_buff += status.b.bcnt;
+               }
+               break;
+       case DWC_STS_XFER_COMP:
+               DWC_DEBUGPL(DBG_PCDV, "OUT Complete\n");
+               break;
+       case DWC_DSTS_SETUP_COMP:
+#ifdef DEBUG_EP0
+               DWC_DEBUGPL(DBG_PCDV, "Setup Complete\n");
+#endif
+               break;
+       case DWC_DSTS_SETUP_UPDT:
+               dwc_otg_read_setup_packet(core_if, pcd->setup_pkt->d32);
+#ifdef DEBUG_EP0
+               DWC_DEBUGPL(DBG_PCD,
+                           "SETUP PKT: %02x.%02x v%04x i%04x l%04x\n",
+                           pcd->setup_pkt->req.bmRequestType,
+                           pcd->setup_pkt->req.bRequest,
+                           UGETW(pcd->setup_pkt->req.wValue),
+                           UGETW(pcd->setup_pkt->req.wIndex),
+                           UGETW(pcd->setup_pkt->req.wLength));
+#endif
+               ep->dwc_ep.xfer_count += status.b.bcnt;
+               break;
+       default:
+               DWC_DEBUGPL(DBG_PCDV, "Invalid Packet Status (0x%0x)\n",
+                           status.b.pktsts);
+               break;
+       }
+
+       /* Enable the Rx Status Queue Level interrupt */
+       DWC_MODIFY_REG32(&global_regs->gintmsk, 0, gintmask.d32);
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.rxstsqlvl = 1;
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       //DWC_DEBUGPL(DBG_PCDV, "EXIT: %s\n", __func__);
+       return 1;
+}
+
+/**
+ * This function examines the Device IN Token Learning Queue to
+ * determine the EP number of the last IN token received.  This
+ * implementation is for the Mass Storage device where there are only
+ * 2 IN EPs (Control-IN and BULK-IN).
+ *
+ * The EP numbers for the first six IN Tokens are in DTKNQR1 and there
+ * are 8 EP Numbers in each of the other possible DTKNQ Registers.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ *
+ */
+static inline int get_ep_of_last_in_token(dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_device_global_regs_t *dev_global_regs =
+           core_if->dev_if->dev_global_regs;
+       const uint32_t TOKEN_Q_DEPTH = core_if->hwcfg2.b.dev_token_q_depth;
+       /* Number of Token Queue Registers */
+       const int DTKNQ_REG_CNT = (TOKEN_Q_DEPTH + 7) / 8;
+       dtknq1_data_t dtknqr1;
+       uint32_t in_tkn_epnums[4];
+       int ndx = 0;
+       int i = 0;
+       volatile uint32_t *addr = &dev_global_regs->dtknqr1;
+       int epnum = 0;
+
+       //DWC_DEBUGPL(DBG_PCD,"dev_token_q_depth=%d\n",TOKEN_Q_DEPTH);
+
+       /* Read the DTKNQ Registers */
+       for (i = 0; i < DTKNQ_REG_CNT; i++) {
+               in_tkn_epnums[i] = DWC_READ_REG32(addr);
+               DWC_DEBUGPL(DBG_PCDV, "DTKNQR%d=0x%08x\n", i + 1,
+                           in_tkn_epnums[i]);
+               if (addr == &dev_global_regs->dvbusdis) {
+                       addr = &dev_global_regs->dtknqr3_dthrctl;
+               } else {
+                       ++addr;
+               }
+
+       }
+
+       /* Copy the DTKNQR1 data to the bit field. */
+       dtknqr1.d32 = in_tkn_epnums[0];
+       /* Get the EP numbers */
+       in_tkn_epnums[0] = dtknqr1.b.epnums0_5;
+       ndx = dtknqr1.b.intknwptr - 1;
+
+       //DWC_DEBUGPL(DBG_PCDV,"ndx=%d\n",ndx);
+       if (ndx == -1) {
+               /** @todo Find a simpler way to calculate the max
+                * queue position.*/
+               int cnt = TOKEN_Q_DEPTH;
+               if (TOKEN_Q_DEPTH <= 6) {
+                       cnt = TOKEN_Q_DEPTH - 1;
+               } else if (TOKEN_Q_DEPTH <= 14) {
+                       cnt = TOKEN_Q_DEPTH - 7;
+               } else if (TOKEN_Q_DEPTH <= 22) {
+                       cnt = TOKEN_Q_DEPTH - 15;
+               } else {
+                       cnt = TOKEN_Q_DEPTH - 23;
+               }
+               epnum = (in_tkn_epnums[DTKNQ_REG_CNT - 1] >> (cnt * 4)) & 0xF;
+       } else {
+               if (ndx <= 5) {
+                       epnum = (in_tkn_epnums[0] >> (ndx * 4)) & 0xF;
+               } else if (ndx <= 13) {
+                       ndx -= 6;
+                       epnum = (in_tkn_epnums[1] >> (ndx * 4)) & 0xF;
+               } else if (ndx <= 21) {
+                       ndx -= 14;
+                       epnum = (in_tkn_epnums[2] >> (ndx * 4)) & 0xF;
+               } else if (ndx <= 29) {
+                       ndx -= 22;
+                       epnum = (in_tkn_epnums[3] >> (ndx * 4)) & 0xF;
+               }
+       }
+       //DWC_DEBUGPL(DBG_PCD,"epnum=%d\n",epnum);
+       return epnum;
+}
+
+/**
+ * This interrupt occurs when the non-periodic Tx FIFO is half-empty.
+ * The active request is checked for the next packet to be loaded into
+ * the non-periodic Tx FIFO.
+ */
+int32_t dwc_otg_pcd_handle_np_tx_fifo_empty_intr(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       dwc_otg_dev_in_ep_regs_t *ep_regs;
+       gnptxsts_data_t txstatus = {.d32 = 0 };
+       gintsts_data_t gintsts;
+
+       int epnum = 0;
+       dwc_otg_pcd_ep_t *ep = 0;
+       uint32_t len = 0;
+       int dwords;
+
+       /* Get the epnum from the IN Token Learning Queue. */
+       epnum = get_ep_of_last_in_token(core_if);
+       ep = get_in_ep(pcd, epnum);
+
+       DWC_DEBUGPL(DBG_PCD, "NP TxFifo Empty: %d \n", epnum);
+
+       ep_regs = core_if->dev_if->in_ep_regs[epnum];
+
+       len = ep->dwc_ep.xfer_len - ep->dwc_ep.xfer_count;
+       if (len > ep->dwc_ep.maxpacket) {
+               len = ep->dwc_ep.maxpacket;
+       }
+       dwords = (len + 3) / 4;
+
+       /* While there is space in the queue and space in the FIFO and
+        * More data to tranfer, Write packets to the Tx FIFO */
+       txstatus.d32 = DWC_READ_REG32(&global_regs->gnptxsts);
+       DWC_DEBUGPL(DBG_PCDV, "b4 GNPTXSTS=0x%08x\n", txstatus.d32);
+
+       while (txstatus.b.nptxqspcavail > 0 &&
+              txstatus.b.nptxfspcavail > dwords &&
+              ep->dwc_ep.xfer_count < ep->dwc_ep.xfer_len) {
+               /* Write the FIFO */
+               dwc_otg_ep_write_packet(core_if, &ep->dwc_ep, 0);
+               len = ep->dwc_ep.xfer_len - ep->dwc_ep.xfer_count;
+
+               if (len > ep->dwc_ep.maxpacket) {
+                       len = ep->dwc_ep.maxpacket;
+               }
+
+               dwords = (len + 3) / 4;
+               txstatus.d32 = DWC_READ_REG32(&global_regs->gnptxsts);
+               DWC_DEBUGPL(DBG_PCDV, "GNPTXSTS=0x%08x\n", txstatus.d32);
+       }
+
+       DWC_DEBUGPL(DBG_PCDV, "GNPTXSTS=0x%08x\n",
+                   DWC_READ_REG32(&global_regs->gnptxsts));
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.nptxfempty = 1;
+       DWC_WRITE_REG32(&global_regs->gintsts, gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * This function is called when dedicated Tx FIFO Empty interrupt occurs.
+ * The active request is checked for the next packet to be loaded into
+ * apropriate Tx FIFO.
+ */
+static int32_t write_empty_tx_fifo(dwc_otg_pcd_t * pcd, uint32_t epnum)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       dwc_otg_dev_in_ep_regs_t *ep_regs;
+       dtxfsts_data_t txstatus = {.d32 = 0 };
+       dwc_otg_pcd_ep_t *ep = 0;
+       uint32_t len = 0;
+       int dwords;
+
+       ep = get_in_ep(pcd, epnum);
+
+       DWC_DEBUGPL(DBG_PCD, "Dedicated TxFifo Empty: %d \n", epnum);
+
+       ep_regs = core_if->dev_if->in_ep_regs[epnum];
+
+       len = ep->dwc_ep.xfer_len - ep->dwc_ep.xfer_count;
+
+       if (len > ep->dwc_ep.maxpacket) {
+               len = ep->dwc_ep.maxpacket;
+       }
+
+       dwords = (len + 3) / 4;
+
+       /* While there is space in the queue and space in the FIFO and
+        * More data to tranfer, Write packets to the Tx FIFO */
+       txstatus.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->dtxfsts);
+       DWC_DEBUGPL(DBG_PCDV, "b4 dtxfsts[%d]=0x%08x\n", epnum, txstatus.d32);
+
+       while (txstatus.b.txfspcavail > dwords &&
+              ep->dwc_ep.xfer_count < ep->dwc_ep.xfer_len &&
+              ep->dwc_ep.xfer_len != 0) {
+               /* Write the FIFO */
+               dwc_otg_ep_write_packet(core_if, &ep->dwc_ep, 0);
+
+               len = ep->dwc_ep.xfer_len - ep->dwc_ep.xfer_count;
+               if (len > ep->dwc_ep.maxpacket) {
+                       len = ep->dwc_ep.maxpacket;
+               }
+
+               dwords = (len + 3) / 4;
+               txstatus.d32 =
+                   DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->dtxfsts);
+               DWC_DEBUGPL(DBG_PCDV, "dtxfsts[%d]=0x%08x\n", epnum,
+                           txstatus.d32);
+       }
+
+       DWC_DEBUGPL(DBG_PCDV, "b4 dtxfsts[%d]=0x%08x\n", epnum,
+                   DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->dtxfsts));
+
+       return 1;
+}
+
+/**
+ * This function is called when the Device is disconnected. It stops
+ * any active requests and informs the Gadget driver of the
+ * disconnect.
+ */
+void dwc_otg_pcd_stop(dwc_otg_pcd_t * pcd)
+{
+       int i, num_in_eps, num_out_eps;
+       dwc_otg_pcd_ep_t *ep;
+
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_SPINLOCK(pcd->lock);
+
+       num_in_eps = GET_CORE_IF(pcd)->dev_if->num_in_eps;
+       num_out_eps = GET_CORE_IF(pcd)->dev_if->num_out_eps;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s() \n", __func__);
+       /* don't disconnect drivers more than once */
+       if (pcd->ep0state == EP0_DISCONNECT) {
+               DWC_DEBUGPL(DBG_ANY, "%s() Already Disconnected\n", __func__);
+               DWC_SPINUNLOCK(pcd->lock);
+               return;
+       }
+       pcd->ep0state = EP0_DISCONNECT;
+
+       /* Reset the OTG state. */
+       dwc_otg_pcd_update_otg(pcd, 1);
+
+       /* Disable the NP Tx Fifo Empty Interrupt. */
+       intr_mask.b.nptxfempty = 1;
+       DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintmsk,
+                        intr_mask.d32, 0);
+
+       /* Flush the FIFOs */
+       /**@todo NGS Flush Periodic FIFOs */
+       dwc_otg_flush_tx_fifo(GET_CORE_IF(pcd), 0x10);
+       dwc_otg_flush_rx_fifo(GET_CORE_IF(pcd));
+
+       /* prevent new request submissions, kill any outstanding requests  */
+       ep = &pcd->ep0;
+       dwc_otg_request_nuke(ep);
+       /* prevent new request submissions, kill any outstanding requests  */
+       for (i = 0; i < num_in_eps; i++) {
+               dwc_otg_pcd_ep_t *ep = &pcd->in_ep[i];
+               dwc_otg_request_nuke(ep);
+       }
+       /* prevent new request submissions, kill any outstanding requests  */
+       for (i = 0; i < num_out_eps; i++) {
+               dwc_otg_pcd_ep_t *ep = &pcd->out_ep[i];
+               dwc_otg_request_nuke(ep);
+       }
+
+       /* report disconnect; the driver is already quiesced */
+       if (pcd->fops->disconnect) {
+               DWC_SPINUNLOCK(pcd->lock);
+               pcd->fops->disconnect(pcd);
+               DWC_SPINLOCK(pcd->lock);
+       }
+       DWC_SPINUNLOCK(pcd->lock);
+}
+
+/**
+ * This interrupt indicates that ...
+ */
+int32_t dwc_otg_pcd_handle_i2c_intr(dwc_otg_pcd_t * pcd)
+{
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       gintsts_data_t gintsts;
+
+       DWC_PRINTF("INTERRUPT Handler not implemented for %s\n", "i2cintr");
+       intr_mask.b.i2cintr = 1;
+       DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintmsk,
+                        intr_mask.d32, 0);
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.i2cintr = 1;
+       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintsts,
+                       gintsts.d32);
+       return 1;
+}
+
+/**
+ * This interrupt indicates that ...
+ */
+int32_t dwc_otg_pcd_handle_early_suspend_intr(dwc_otg_pcd_t * pcd)
+{
+       gintsts_data_t gintsts;
+#if defined(VERBOSE)
+       DWC_PRINTF("Early Suspend Detected\n");
+#endif
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.erlysuspend = 1;
+       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintsts,
+                       gintsts.d32);
+       return 1;
+}
+
+/**
+ * This function configures EPO to receive SETUP packets.
+ *
+ * @todo NGS: Update the comments from the HW FS.
+ *
+ *     -# Program the following fields in the endpoint specific registers
+ *     for Control OUT EP 0, in order to receive a setup packet
+ *     - DOEPTSIZ0.Packet Count = 3 (To receive up to 3 back to back
+ *       setup packets)
+ *     - DOEPTSIZE0.Transfer Size = 24 Bytes (To receive up to 3 back
+ *       to back setup packets)
+ *             - In DMA mode, DOEPDMA0 Register with a memory address to
+ *               store any setup packets received
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param pcd    Programming view of the PCD.
+ */
+static inline void ep0_out_start(dwc_otg_core_if_t * core_if,
+                                dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       deptsiz0_data_t doeptsize0 = {.d32 = 0 };
+       dwc_otg_dev_dma_desc_t *dma_desc;
+       depctl_data_t doepctl = {.d32 = 0 };
+
+#ifdef VERBOSE
+       DWC_DEBUGPL(DBG_PCDV, "%s() doepctl0=%0x\n", __func__,
+                   DWC_READ_REG32(&dev_if->out_ep_regs[0]->doepctl));
+#endif
+       if (core_if->snpsid >= OTG_CORE_REV_3_00a) {
+               doepctl.d32 = DWC_READ_REG32(&dev_if->out_ep_regs[0]->doepctl);
+               if (doepctl.b.epena) {
+                       return;
+               }
+       }
+
+       doeptsize0.b.supcnt = 3;
+       doeptsize0.b.pktcnt = 1;
+       doeptsize0.b.xfersize = 8 * 3;
+
+       if (core_if->dma_enable) {
+               if (!core_if->dma_desc_enable) {
+                       /** put here as for Hermes mode deptisz register should not be written */
+                       DWC_WRITE_REG32(&dev_if->out_ep_regs[0]->doeptsiz,
+                                       doeptsize0.d32);
+
+                       /** @todo dma needs to handle multiple setup packets (up to 3) */
+                       DWC_WRITE_REG32(&dev_if->out_ep_regs[0]->doepdma,
+                                       pcd->setup_pkt_dma_handle);
+               } else {
+                       dev_if->setup_desc_index =
+                           (dev_if->setup_desc_index + 1) & 1;
+                       dma_desc =
+                           dev_if->setup_desc_addr[dev_if->setup_desc_index];
+
+                       /** DMA Descriptor Setup */
+                       dma_desc->status.b.bs = BS_HOST_BUSY;
+                       if (core_if->snpsid >= OTG_CORE_REV_3_00a) {
+                               dma_desc->status.b.sr = 0;
+                               dma_desc->status.b.mtrf = 0;
+                       }
+                       dma_desc->status.b.l = 1;
+                       dma_desc->status.b.ioc = 1;
+                       dma_desc->status.b.bytes = pcd->ep0.dwc_ep.maxpacket;
+                       dma_desc->buf = pcd->setup_pkt_dma_handle;
+                       dma_desc->status.b.sts = 0;
+                       dma_desc->status.b.bs = BS_HOST_READY;
+
+                       /** DOEPDMA0 Register write */
+                       DWC_WRITE_REG32(&dev_if->out_ep_regs[0]->doepdma,
+                                       dev_if->dma_setup_desc_addr
+                                       [dev_if->setup_desc_index]);
+               }
+
+       } else {
+               /** put here as for Hermes mode deptisz register should not be written */
+               DWC_WRITE_REG32(&dev_if->out_ep_regs[0]->doeptsiz,
+                               doeptsize0.d32);
+       }
+
+       /** DOEPCTL0 Register write cnak will be set after setup interrupt */
+       doepctl.d32 = 0;
+       doepctl.b.epena = 1;
+       if (core_if->snpsid <= OTG_CORE_REV_2_94a) {
+       doepctl.b.cnak = 1;
+       DWC_WRITE_REG32(&dev_if->out_ep_regs[0]->doepctl, doepctl.d32);
+       } else {
+               DWC_MODIFY_REG32(&dev_if->out_ep_regs[0]->doepctl, 0, doepctl.d32);
+       }
+
+#ifdef VERBOSE
+       DWC_DEBUGPL(DBG_PCDV, "doepctl0=%0x\n",
+                   DWC_READ_REG32(&dev_if->out_ep_regs[0]->doepctl));
+       DWC_DEBUGPL(DBG_PCDV, "diepctl0=%0x\n",
+                   DWC_READ_REG32(&dev_if->in_ep_regs[0]->diepctl));
+#endif
+}
+
+/**
+ * This interrupt occurs when a USB Reset is detected. When the USB
+ * Reset Interrupt occurs the device state is set to DEFAULT and the
+ * EP0 state is set to IDLE.
+ *     -#      Set the NAK bit for all OUT endpoints (DOEPCTLn.SNAK = 1)
+ *     -#      Unmask the following interrupt bits
+ *             - DAINTMSK.INEP0 = 1 (Control 0 IN endpoint)
+ *     - DAINTMSK.OUTEP0 = 1 (Control 0 OUT endpoint)
+ *     - DOEPMSK.SETUP = 1
+ *     - DOEPMSK.XferCompl = 1
+ *     - DIEPMSK.XferCompl = 1
+ *     - DIEPMSK.TimeOut = 1
+ *     -# Program the following fields in the endpoint specific registers
+ *     for Control OUT EP 0, in order to receive a setup packet
+ *     - DOEPTSIZ0.Packet Count = 3 (To receive up to 3 back to back
+ *       setup packets)
+ *     - DOEPTSIZE0.Transfer Size = 24 Bytes (To receive up to 3 back
+ *       to back setup packets)
+ *             - In DMA mode, DOEPDMA0 Register with a memory address to
+ *               store any setup packets received
+ * At this point, all the required initialization, except for enabling
+ * the control 0 OUT endpoint is done, for receiving SETUP packets.
+ */
+int32_t dwc_otg_pcd_handle_usb_reset_intr(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       depctl_data_t doepctl = {.d32 = 0 };
+       depctl_data_t diepctl = {.d32 = 0 };
+       daint_data_t daintmsk = {.d32 = 0 };
+       doepmsk_data_t doepmsk = {.d32 = 0 };
+       diepmsk_data_t diepmsk = {.d32 = 0 };
+       dcfg_data_t dcfg = {.d32 = 0 };
+       grstctl_t resetctl = {.d32 = 0 };
+       dctl_data_t dctl = {.d32 = 0 };
+       int i = 0;
+       gintsts_data_t gintsts;
+       pcgcctl_data_t power = {.d32 = 0 };
+
+       power.d32 = DWC_READ_REG32(core_if->pcgcctl);
+       if (power.b.stoppclk) {
+               power.d32 = 0;
+               power.b.stoppclk = 1;
+               DWC_MODIFY_REG32(core_if->pcgcctl, power.d32, 0);
+
+               power.b.pwrclmp = 1;
+               DWC_MODIFY_REG32(core_if->pcgcctl, power.d32, 0);
+
+               power.b.rstpdwnmodule = 1;
+               DWC_MODIFY_REG32(core_if->pcgcctl, power.d32, 0);
+       }
+
+       core_if->lx_state = DWC_OTG_L0;
+
+       DWC_PRINTF("USB RESET\n");
+#ifdef DWC_EN_ISOC
+       for (i = 1; i < 16; ++i) {
+               dwc_otg_pcd_ep_t *ep;
+               dwc_ep_t *dwc_ep;
+               ep = get_in_ep(pcd, i);
+               if (ep != 0) {
+                       dwc_ep = &ep->dwc_ep;
+                       dwc_ep->next_frame = 0xffffffff;
+               }
+       }
+#endif /* DWC_EN_ISOC */
+
+       /* reset the HNP settings */
+       dwc_otg_pcd_update_otg(pcd, 1);
+
+       /* Clear the Remote Wakeup Signalling */
+       dctl.b.rmtwkupsig = 1;
+       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, dctl.d32, 0);
+
+       /* Set NAK for all OUT EPs */
+       doepctl.b.snak = 1;
+       for (i = 0; i <= dev_if->num_out_eps; i++) {
+               DWC_WRITE_REG32(&dev_if->out_ep_regs[i]->doepctl, doepctl.d32);
+       }
+
+       /* Flush the NP Tx FIFO */
+       dwc_otg_flush_tx_fifo(core_if, 0x10);
+       /* Flush the Learning Queue */
+       resetctl.b.intknqflsh = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->grstctl, resetctl.d32);
+
+       if (!core_if->core_params->en_multiple_tx_fifo && core_if->dma_enable) {
+               core_if->start_predict = 0;
+               for (i = 0; i<= core_if->dev_if->num_in_eps; ++i) {
+                       core_if->nextep_seq[i] = 0xff;  // 0xff - EP not active
+               }
+               core_if->nextep_seq[0] = 0;
+               core_if->first_in_nextep_seq = 0;
+               diepctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[0]->diepctl);
+               diepctl.b.nextep = 0;
+               DWC_WRITE_REG32(&dev_if->in_ep_regs[0]->diepctl, diepctl.d32);
+
+               /* Update IN Endpoint Mismatch Count by active IN NP EP count + 1 */
+               dcfg.d32 = DWC_READ_REG32(&dev_if->dev_global_regs->dcfg);
+               dcfg.b.epmscnt = 2;
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->dcfg, dcfg.d32);
+
+               DWC_DEBUGPL(DBG_PCDV,
+                           "%s first_in_nextep_seq= %2d; nextep_seq[]:\n",
+                       __func__, core_if->first_in_nextep_seq);
+               for (i=0; i <= core_if->dev_if->num_in_eps; i++) {
+                       DWC_DEBUGPL(DBG_PCDV, "%2d\n", core_if->nextep_seq[i]);
+               }
+       }
+
+       if (core_if->multiproc_int_enable) {
+               daintmsk.b.inep0 = 1;
+               daintmsk.b.outep0 = 1;
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->deachintmsk,
+                               daintmsk.d32);
+
+               doepmsk.b.setup = 1;
+               doepmsk.b.xfercompl = 1;
+               doepmsk.b.ahberr = 1;
+               doepmsk.b.epdisabled = 1;
+
+               if ((core_if->dma_desc_enable) ||
+                   (core_if->dma_enable
+                    && core_if->snpsid >= OTG_CORE_REV_3_00a)) {
+                       doepmsk.b.stsphsercvd = 1;
+               }
+               if (core_if->dma_desc_enable)
+                       doepmsk.b.bna = 1;
+/*
+               doepmsk.b.babble = 1;
+               doepmsk.b.nyet = 1;
+
+               if (core_if->dma_enable) {
+                       doepmsk.b.nak = 1;
+               }
+*/
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->doepeachintmsk[0],
+                               doepmsk.d32);
+
+               diepmsk.b.xfercompl = 1;
+               diepmsk.b.timeout = 1;
+               diepmsk.b.epdisabled = 1;
+               diepmsk.b.ahberr = 1;
+               diepmsk.b.intknepmis = 1;
+               if (!core_if->en_multiple_tx_fifo && core_if->dma_enable)
+                       diepmsk.b.intknepmis = 0;
+
+/*             if (core_if->dma_desc_enable) {
+                       diepmsk.b.bna = 1;
+               }
+*/
+/*
+               if (core_if->dma_enable) {
+                       diepmsk.b.nak = 1;
+               }
+*/
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->diepeachintmsk[0],
+                               diepmsk.d32);
+       } else {
+               daintmsk.b.inep0 = 1;
+               daintmsk.b.outep0 = 1;
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->daintmsk,
+                               daintmsk.d32);
+
+               doepmsk.b.setup = 1;
+               doepmsk.b.xfercompl = 1;
+               doepmsk.b.ahberr = 1;
+               doepmsk.b.epdisabled = 1;
+
+               if ((core_if->dma_desc_enable) ||
+                   (core_if->dma_enable
+                    && core_if->snpsid >= OTG_CORE_REV_3_00a)) {
+                       doepmsk.b.stsphsercvd = 1;
+               }
+               if (core_if->dma_desc_enable)
+                       doepmsk.b.bna = 1;
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->doepmsk, doepmsk.d32);
+
+               diepmsk.b.xfercompl = 1;
+               diepmsk.b.timeout = 1;
+               diepmsk.b.epdisabled = 1;
+               diepmsk.b.ahberr = 1;
+               if (!core_if->en_multiple_tx_fifo && core_if->dma_enable)
+                       diepmsk.b.intknepmis = 0;
+/*
+               if (core_if->dma_desc_enable) {
+                       diepmsk.b.bna = 1;
+               }
+*/
+
+               DWC_WRITE_REG32(&dev_if->dev_global_regs->diepmsk, diepmsk.d32);
+       }
+
+       /* Reset Device Address */
+       dcfg.d32 = DWC_READ_REG32(&dev_if->dev_global_regs->dcfg);
+       dcfg.b.devaddr = 0;
+       DWC_WRITE_REG32(&dev_if->dev_global_regs->dcfg, dcfg.d32);
+
+       /* setup EP0 to receive SETUP packets */
+       if (core_if->snpsid <= OTG_CORE_REV_2_94a)
+               ep0_out_start(core_if, pcd);
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.usbreset = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * Get the device speed from the device status register and convert it
+ * to USB speed constant.
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ */
+static int get_device_speed(dwc_otg_core_if_t * core_if)
+{
+       dsts_data_t dsts;
+       int speed = 0;
+       dsts.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
+
+       switch (dsts.b.enumspd) {
+       case DWC_DSTS_ENUMSPD_HS_PHY_30MHZ_OR_60MHZ:
+               speed = USB_SPEED_HIGH;
+               break;
+       case DWC_DSTS_ENUMSPD_FS_PHY_30MHZ_OR_60MHZ:
+       case DWC_DSTS_ENUMSPD_FS_PHY_48MHZ:
+               speed = USB_SPEED_FULL;
+               break;
+
+       case DWC_DSTS_ENUMSPD_LS_PHY_6MHZ:
+               speed = USB_SPEED_LOW;
+               break;
+       }
+
+       return speed;
+}
+
+/**
+ * Read the device status register and set the device speed in the
+ * data structure.
+ * Set up EP0 to receive SETUP packets by calling dwc_ep0_activate.
+ */
+int32_t dwc_otg_pcd_handle_enum_done_intr(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_pcd_ep_t *ep0 = &pcd->ep0;
+       gintsts_data_t gintsts;
+       gusbcfg_data_t gusbcfg;
+       dwc_otg_core_global_regs_t *global_regs =
+           GET_CORE_IF(pcd)->core_global_regs;
+       uint8_t utmi16b, utmi8b;
+       int speed;
+       DWC_DEBUGPL(DBG_PCD, "SPEED ENUM\n");
+
+       if (GET_CORE_IF(pcd)->snpsid >= OTG_CORE_REV_2_60a) {
+               utmi16b = 6;    //vahrama old value was 6;
+               utmi8b = 9;
+       } else {
+               utmi16b = 4;
+               utmi8b = 8;
+       }
+       dwc_otg_ep0_activate(GET_CORE_IF(pcd), &ep0->dwc_ep);
+       if (GET_CORE_IF(pcd)->snpsid >= OTG_CORE_REV_3_00a) {
+               ep0_out_start(GET_CORE_IF(pcd), pcd);
+       }
+
+#ifdef DEBUG_EP0
+       print_ep0_state(pcd);
+#endif
+
+       if (pcd->ep0state == EP0_DISCONNECT) {
+               pcd->ep0state = EP0_IDLE;
+       } else if (pcd->ep0state == EP0_STALL) {
+               pcd->ep0state = EP0_IDLE;
+       }
+
+       pcd->ep0state = EP0_IDLE;
+
+       ep0->stopped = 0;
+
+       speed = get_device_speed(GET_CORE_IF(pcd));
+       pcd->fops->connect(pcd, speed);
+
+       /* Set USB turnaround time based on device speed and PHY interface. */
+       gusbcfg.d32 = DWC_READ_REG32(&global_regs->gusbcfg);
+       if (speed == USB_SPEED_HIGH) {
+               if (GET_CORE_IF(pcd)->hwcfg2.b.hs_phy_type ==
+                   DWC_HWCFG2_HS_PHY_TYPE_ULPI) {
+                       /* ULPI interface */
+                       gusbcfg.b.usbtrdtim = 9;
+               }
+               if (GET_CORE_IF(pcd)->hwcfg2.b.hs_phy_type ==
+                   DWC_HWCFG2_HS_PHY_TYPE_UTMI) {
+                       /* UTMI+ interface */
+                       if (GET_CORE_IF(pcd)->hwcfg4.b.utmi_phy_data_width == 0) {
+                               gusbcfg.b.usbtrdtim = utmi8b;
+                       } else if (GET_CORE_IF(pcd)->hwcfg4.
+                                  b.utmi_phy_data_width == 1) {
+                               gusbcfg.b.usbtrdtim = utmi16b;
+                       } else if (GET_CORE_IF(pcd)->
+                                  core_params->phy_utmi_width == 8) {
+                               gusbcfg.b.usbtrdtim = utmi8b;
+                       } else {
+                               gusbcfg.b.usbtrdtim = utmi16b;
+                       }
+               }
+               if (GET_CORE_IF(pcd)->hwcfg2.b.hs_phy_type ==
+                   DWC_HWCFG2_HS_PHY_TYPE_UTMI_ULPI) {
+                       /* UTMI+  OR  ULPI interface */
+                       if (gusbcfg.b.ulpi_utmi_sel == 1) {
+                               /* ULPI interface */
+                               gusbcfg.b.usbtrdtim = 9;
+                       } else {
+                               /* UTMI+ interface */
+                               if (GET_CORE_IF(pcd)->
+                                   core_params->phy_utmi_width == 16) {
+                                       gusbcfg.b.usbtrdtim = utmi16b;
+                               } else {
+                                       gusbcfg.b.usbtrdtim = utmi8b;
+                               }
+                       }
+               }
+       } else {
+               /* Full or low speed */
+               gusbcfg.b.usbtrdtim = 9;
+       }
+       DWC_WRITE_REG32(&global_regs->gusbcfg, gusbcfg.d32);
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.enumdone = 1;
+       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintsts,
+                       gintsts.d32);
+       return 1;
+}
+
+/**
+ * This interrupt indicates that the ISO OUT Packet was dropped due to
+ * Rx FIFO full or Rx Status Queue Full.  If this interrupt occurs
+ * read all the data from the Rx FIFO.
+ */
+int32_t dwc_otg_pcd_handle_isoc_out_packet_dropped_intr(dwc_otg_pcd_t * pcd)
+{
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       gintsts_data_t gintsts;
+
+       DWC_WARN("INTERRUPT Handler not implemented for %s\n",
+                "ISOC Out Dropped");
+
+       intr_mask.b.isooutdrop = 1;
+       DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintmsk,
+                        intr_mask.d32, 0);
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.isooutdrop = 1;
+       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintsts,
+                       gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * This interrupt indicates the end of the portion of the micro-frame
+ * for periodic transactions.  If there is a periodic transaction for
+ * the next frame, load the packets into the EP periodic Tx FIFO.
+ */
+int32_t dwc_otg_pcd_handle_end_periodic_frame_intr(dwc_otg_pcd_t * pcd)
+{
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       gintsts_data_t gintsts;
+       DWC_PRINTF("INTERRUPT Handler not implemented for %s\n", "EOP");
+
+       intr_mask.b.eopframe = 1;
+       DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintmsk,
+                        intr_mask.d32, 0);
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.eopframe = 1;
+       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintsts,
+                       gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * This interrupt indicates that EP of the packet on the top of the
+ * non-periodic Tx FIFO does not match EP of the IN Token received.
+ *
+ * The "Device IN Token Queue" Registers are read to determine the
+ * order the IN Tokens have been received. The non-periodic Tx FIFO
+ * is flushed, so it can be reloaded in the order seen in the IN Token
+ * Queue.
+ */
+int32_t dwc_otg_pcd_handle_ep_mismatch_intr(dwc_otg_pcd_t * pcd)
+{
+       gintsts_data_t gintsts;
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dctl_data_t dctl;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       if (!core_if->en_multiple_tx_fifo && core_if->dma_enable) {
+               core_if->start_predict = 1;
+
+               DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, core_if);
+
+               gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+               if (!gintsts.b.ginnakeff) {
+                       /* Disable EP Mismatch interrupt */
+                       intr_mask.d32 = 0;
+                       intr_mask.b.epmismatch = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk, intr_mask.d32, 0);
+                       /* Enable the Global IN NAK Effective Interrupt */
+                       intr_mask.d32 = 0;
+                       intr_mask.b.ginnakeff = 1;
+                       DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk, 0, intr_mask.d32);
+                       /* Set the global non-periodic IN NAK handshake */
+                       dctl.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dctl);
+                       dctl.b.sgnpinnak = 1;
+                       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dctl, dctl.d32);
+               } else {
+                       DWC_PRINTF("gintsts.b.ginnakeff = 1! dctl.b.sgnpinnak not set\n");
+               }
+               /* Disabling of all EP's will be done in dwc_otg_pcd_handle_in_nak_effective()
+                * handler after Global IN NAK Effective interrupt will be asserted */
+       }
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.epmismatch = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * This interrupt is valid only in DMA mode. This interrupt indicates that the
+ * core has stopped fetching data for IN endpoints due to the unavailability of
+ * TxFIFO space or Request Queue space. This interrupt is used by the
+ * application for an endpoint mismatch algorithm.
+ *
+ * @param pcd The PCD
+ */
+int32_t dwc_otg_pcd_handle_ep_fetsusp_intr(dwc_otg_pcd_t * pcd)
+{
+       gintsts_data_t gintsts;
+       gintmsk_data_t gintmsk_data;
+       dctl_data_t dctl;
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, core_if);
+
+       /* Clear the global non-periodic IN NAK handshake */
+       dctl.d32 = 0;
+       dctl.b.cgnpinnak = 1;
+       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->dctl, dctl.d32, dctl.d32);
+
+       /* Mask GINTSTS.FETSUSP interrupt */
+       gintmsk_data.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk);
+       gintmsk_data.b.fetsusp = 0;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, gintmsk_data.d32);
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.fetsusp = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
+
+       return 1;
+}
+/**
+ * This funcion stalls EP0.
+ */
+static inline void ep0_do_stall(dwc_otg_pcd_t * pcd, const int err_val)
+{
+       dwc_otg_pcd_ep_t *ep0 = &pcd->ep0;
+       usb_device_request_t *ctrl = &pcd->setup_pkt->req;
+       DWC_WARN("req %02x.%02x protocol STALL; err %d\n",
+                ctrl->bmRequestType, ctrl->bRequest, err_val);
+
+       ep0->dwc_ep.is_in = 1;
+       dwc_otg_ep_set_stall(GET_CORE_IF(pcd), &ep0->dwc_ep);
+       pcd->ep0.stopped = 1;
+       pcd->ep0state = EP0_IDLE;
+       ep0_out_start(GET_CORE_IF(pcd), pcd);
+}
+
+/**
+ * This functions delegates the setup command to the gadget driver.
+ */
+static inline void do_gadget_setup(dwc_otg_pcd_t * pcd,
+                                  usb_device_request_t * ctrl)
+{
+       int ret = 0;
+       DWC_SPINUNLOCK(pcd->lock);
+       ret = pcd->fops->setup(pcd, (uint8_t *) ctrl);
+       DWC_SPINLOCK(pcd->lock);
+       if (ret < 0) {
+               ep0_do_stall(pcd, ret);
+       }
+
+       /** @todo This is a g_file_storage gadget driver specific
+        * workaround: a DELAYED_STATUS result from the fsg_setup
+        * routine will result in the gadget queueing a EP0 IN status
+        * phase for a two-stage control transfer. Exactly the same as
+        * a SET_CONFIGURATION/SET_INTERFACE except that this is a class
+        * specific request.  Need a generic way to know when the gadget
+        * driver will queue the status phase. Can we assume when we
+        * call the gadget driver setup() function that it will always
+        * queue and require the following flag? Need to look into
+        * this.
+        */
+
+       if (ret == 256 + 999) {
+               pcd->request_config = 1;
+       }
+}
+
+#ifdef DWC_UTE_CFI
+/**
+ * This functions delegates the CFI setup commands to the gadget driver.
+ * This function will return a negative value to indicate a failure.
+ */
+static inline int cfi_gadget_setup(dwc_otg_pcd_t * pcd,
+                                  struct cfi_usb_ctrlrequest *ctrl_req)
+{
+       int ret = 0;
+
+       if (pcd->fops && pcd->fops->cfi_setup) {
+               DWC_SPINUNLOCK(pcd->lock);
+               ret = pcd->fops->cfi_setup(pcd, ctrl_req);
+               DWC_SPINLOCK(pcd->lock);
+               if (ret < 0) {
+                       ep0_do_stall(pcd, ret);
+                       return ret;
+               }
+       }
+
+       return ret;
+}
+#endif
+
+/**
+ * This function starts the Zero-Length Packet for the IN status phase
+ * of a 2 stage control transfer.
+ */
+static inline void do_setup_in_status_phase(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_pcd_ep_t *ep0 = &pcd->ep0;
+       if (pcd->ep0state == EP0_STALL) {
+               return;
+       }
+
+       pcd->ep0state = EP0_IN_STATUS_PHASE;
+
+       /* Prepare for more SETUP Packets */
+       DWC_DEBUGPL(DBG_PCD, "EP0 IN ZLP\n");
+       if ((GET_CORE_IF(pcd)->snpsid >= OTG_CORE_REV_3_00a)
+           && (pcd->core_if->dma_desc_enable)
+           && (ep0->dwc_ep.xfer_count < ep0->dwc_ep.total_len)) {
+               DWC_DEBUGPL(DBG_PCDV,
+                           "Data terminated wait next packet in out_desc_addr\n");
+               pcd->backup_buf = phys_to_virt(ep0->dwc_ep.dma_addr);
+               pcd->data_terminated = 1;
+       }
+       ep0->dwc_ep.xfer_len = 0;
+       ep0->dwc_ep.xfer_count = 0;
+       ep0->dwc_ep.is_in = 1;
+       ep0->dwc_ep.dma_addr = pcd->setup_pkt_dma_handle;
+       dwc_otg_ep0_start_transfer(GET_CORE_IF(pcd), &ep0->dwc_ep);
+
+       /* Prepare for more SETUP Packets */
+       //ep0_out_start(GET_CORE_IF(pcd), pcd);
+}
+
+/**
+ * This function starts the Zero-Length Packet for the OUT status phase
+ * of a 2 stage control transfer.
+ */
+static inline void do_setup_out_status_phase(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_pcd_ep_t *ep0 = &pcd->ep0;
+       if (pcd->ep0state == EP0_STALL) {
+               DWC_DEBUGPL(DBG_PCD, "EP0 STALLED\n");
+               return;
+       }
+       pcd->ep0state = EP0_OUT_STATUS_PHASE;
+
+       DWC_DEBUGPL(DBG_PCD, "EP0 OUT ZLP\n");
+       ep0->dwc_ep.xfer_len = 0;
+       ep0->dwc_ep.xfer_count = 0;
+       ep0->dwc_ep.is_in = 0;
+       ep0->dwc_ep.dma_addr = pcd->setup_pkt_dma_handle;
+       dwc_otg_ep0_start_transfer(GET_CORE_IF(pcd), &ep0->dwc_ep);
+
+       /* Prepare for more SETUP Packets */
+       if (GET_CORE_IF(pcd)->dma_enable == 0) {
+               ep0_out_start(GET_CORE_IF(pcd), pcd);
+       }
+}
+
+/**
+ * Clear the EP halt (STALL) and if pending requests start the
+ * transfer.
+ */
+static inline void pcd_clear_halt(dwc_otg_pcd_t * pcd, dwc_otg_pcd_ep_t * ep)
+{
+       if (ep->dwc_ep.stall_clear_flag == 0)
+               dwc_otg_ep_clear_stall(GET_CORE_IF(pcd), &ep->dwc_ep);
+
+       /* Reactive the EP */
+       dwc_otg_ep_activate(GET_CORE_IF(pcd), &ep->dwc_ep);
+       if (ep->stopped) {
+               ep->stopped = 0;
+               /* If there is a request in the EP queue start it */
+
+               /** @todo FIXME: this causes an EP mismatch in DMA mode.
+                * epmismatch not yet implemented. */
+
+               /*
+                * Above fixme is solved by implmenting a tasklet to call the
+                * start_next_request(), outside of interrupt context at some
+                * time after the current time, after a clear-halt setup packet.
+                * Still need to implement ep mismatch in the future if a gadget
+                * ever uses more than one endpoint at once
+                */
+               ep->queue_sof = 1;
+               DWC_TASK_SCHEDULE(pcd->start_xfer_tasklet);
+       }
+       /* Start Control Status Phase */
+       do_setup_in_status_phase(pcd);
+}
+
+/**
+ * This function is called when the SET_FEATURE TEST_MODE Setup packet
+ * is sent from the host.  The Device Control register is written with
+ * the Test Mode bits set to the specified Test Mode.  This is done as
+ * a tasklet so that the "Status" phase of the control transfer
+ * completes before transmitting the TEST packets.
+ *
+ * @todo This has not been tested since the tasklet struct was put
+ * into the PCD struct!
+ *
+ */
+void do_test_mode(void *data)
+{
+       dctl_data_t dctl;
+       dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) data;
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       int test_mode = pcd->test_mode;
+
+//        DWC_WARN("%s() has not been tested since being rewritten!\n", __func__);
+
+       dctl.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dctl);
+       switch (test_mode) {
+       case 1:         // TEST_J
+               dctl.b.tstctl = 1;
+               break;
+
+       case 2:         // TEST_K
+               dctl.b.tstctl = 2;
+               break;
+
+       case 3:         // TEST_SE0_NAK
+               dctl.b.tstctl = 3;
+               break;
+
+       case 4:         // TEST_PACKET
+               dctl.b.tstctl = 4;
+               break;
+
+       case 5:         // TEST_FORCE_ENABLE
+               dctl.b.tstctl = 5;
+               break;
+       }
+       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dctl, dctl.d32);
+}
+
+/**
+ * This function process the GET_STATUS Setup Commands.
+ */
+static inline void do_get_status(dwc_otg_pcd_t * pcd)
+{
+       usb_device_request_t ctrl = pcd->setup_pkt->req;
+       dwc_otg_pcd_ep_t *ep;
+       dwc_otg_pcd_ep_t *ep0 = &pcd->ep0;
+       uint16_t *status = pcd->status_buf;
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+
+#ifdef DEBUG_EP0
+       DWC_DEBUGPL(DBG_PCD,
+                   "GET_STATUS %02x.%02x v%04x i%04x l%04x\n",
+                   ctrl.bmRequestType, ctrl.bRequest,
+                   UGETW(ctrl.wValue), UGETW(ctrl.wIndex),
+                   UGETW(ctrl.wLength));
+#endif
+
+       switch (UT_GET_RECIPIENT(ctrl.bmRequestType)) {
+       case UT_DEVICE:
+               if(UGETW(ctrl.wIndex) == 0xF000) { /* OTG Status selector */
+                       DWC_PRINTF("wIndex - %d\n", UGETW(ctrl.wIndex));
+                       DWC_PRINTF("OTG VERSION - %d\n", core_if->otg_ver);
+                       DWC_PRINTF("OTG CAP - %d, %d\n",
+                                  core_if->core_params->otg_cap,
+                                               DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE);
+                       if (core_if->otg_ver == 1
+                           && core_if->core_params->otg_cap ==
+                           DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE) {
+                               uint8_t *otgsts = (uint8_t*)pcd->status_buf;
+                               *otgsts = (core_if->otg_sts & 0x1);
+                               pcd->ep0_pending = 1;
+                               ep0->dwc_ep.start_xfer_buff =
+                                   (uint8_t *) otgsts;
+                               ep0->dwc_ep.xfer_buff = (uint8_t *) otgsts;
+                               ep0->dwc_ep.dma_addr =
+                                   pcd->status_buf_dma_handle;
+                               ep0->dwc_ep.xfer_len = 1;
+                               ep0->dwc_ep.xfer_count = 0;
+                               ep0->dwc_ep.total_len = ep0->dwc_ep.xfer_len;
+                               dwc_otg_ep0_start_transfer(GET_CORE_IF(pcd),
+                                                          &ep0->dwc_ep);
+                               return;
+                       } else {
+                               ep0_do_stall(pcd, -DWC_E_NOT_SUPPORTED);
+                               return;
+                       }
+                       break;
+               } else {
+                       *status = 0x1;  /* Self powered */
+                       *status |= pcd->remote_wakeup_enable << 1;
+                       break;
+               }
+       case UT_INTERFACE:
+               *status = 0;
+               break;
+
+       case UT_ENDPOINT:
+               ep = get_ep_by_addr(pcd, UGETW(ctrl.wIndex));
+               if (ep == 0 || UGETW(ctrl.wLength) > 2) {
+                       ep0_do_stall(pcd, -DWC_E_NOT_SUPPORTED);
+                       return;
+               }
+               /** @todo check for EP stall */
+               *status = ep->stopped;
+               break;
+       }
+       pcd->ep0_pending = 1;
+       ep0->dwc_ep.start_xfer_buff = (uint8_t *) status;
+       ep0->dwc_ep.xfer_buff = (uint8_t *) status;
+       ep0->dwc_ep.dma_addr = pcd->status_buf_dma_handle;
+       ep0->dwc_ep.xfer_len = 2;
+       ep0->dwc_ep.xfer_count = 0;
+       ep0->dwc_ep.total_len = ep0->dwc_ep.xfer_len;
+       dwc_otg_ep0_start_transfer(GET_CORE_IF(pcd), &ep0->dwc_ep);
+}
+
+/**
+ * This function process the SET_FEATURE Setup Commands.
+ */
+static inline void do_set_feature(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+       usb_device_request_t ctrl = pcd->setup_pkt->req;
+       dwc_otg_pcd_ep_t *ep = 0;
+       int32_t otg_cap_param = core_if->core_params->otg_cap;
+       gotgctl_data_t gotgctl = {.d32 = 0 };
+
+       DWC_DEBUGPL(DBG_PCD, "SET_FEATURE:%02x.%02x v%04x i%04x l%04x\n",
+                   ctrl.bmRequestType, ctrl.bRequest,
+                   UGETW(ctrl.wValue), UGETW(ctrl.wIndex),
+                   UGETW(ctrl.wLength));
+       DWC_DEBUGPL(DBG_PCD, "otg_cap=%d\n", otg_cap_param);
+
+       switch (UT_GET_RECIPIENT(ctrl.bmRequestType)) {
+       case UT_DEVICE:
+               switch (UGETW(ctrl.wValue)) {
+               case UF_DEVICE_REMOTE_WAKEUP:
+                       pcd->remote_wakeup_enable = 1;
+                       break;
+
+               case UF_TEST_MODE:
+                       /* Setup the Test Mode tasklet to do the Test
+                        * Packet generation after the SETUP Status
+                        * phase has completed. */
+
+                       /** @todo This has not been tested since the
+                        * tasklet struct was put into the PCD
+                        * struct! */
+                       pcd->test_mode = UGETW(ctrl.wIndex) >> 8;
+                       DWC_TASK_SCHEDULE(pcd->test_mode_tasklet);
+                       break;
+
+               case UF_DEVICE_B_HNP_ENABLE:
+                       DWC_DEBUGPL(DBG_PCDV,
+                                   "SET_FEATURE: USB_DEVICE_B_HNP_ENABLE\n");
+
+                       /* dev may initiate HNP */
+                       if (otg_cap_param == DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE) {
+                               pcd->b_hnp_enable = 1;
+                               dwc_otg_pcd_update_otg(pcd, 0);
+                               DWC_DEBUGPL(DBG_PCD, "Request B HNP\n");
+                               /**@todo Is the gotgctl.devhnpen cleared
+                                * by a USB Reset? */
+                               gotgctl.b.devhnpen = 1;
+                               gotgctl.b.hnpreq = 1;
+                               DWC_WRITE_REG32(&global_regs->gotgctl,
+                                               gotgctl.d32);
+                       } else {
+                               ep0_do_stall(pcd, -DWC_E_NOT_SUPPORTED);
+                               return;
+                       }
+                       break;
+
+               case UF_DEVICE_A_HNP_SUPPORT:
+                       /* RH port supports HNP */
+                       DWC_DEBUGPL(DBG_PCDV,
+                                   "SET_FEATURE: USB_DEVICE_A_HNP_SUPPORT\n");
+                       if (otg_cap_param == DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE) {
+                               pcd->a_hnp_support = 1;
+                               dwc_otg_pcd_update_otg(pcd, 0);
+                       } else {
+                               ep0_do_stall(pcd, -DWC_E_NOT_SUPPORTED);
+                               return;
+                       }
+                       break;
+
+               case UF_DEVICE_A_ALT_HNP_SUPPORT:
+                       /* other RH port does */
+                       DWC_DEBUGPL(DBG_PCDV,
+                                   "SET_FEATURE: USB_DEVICE_A_ALT_HNP_SUPPORT\n");
+                       if (otg_cap_param == DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE) {
+                               pcd->a_alt_hnp_support = 1;
+                               dwc_otg_pcd_update_otg(pcd, 0);
+                       } else {
+                               ep0_do_stall(pcd, -DWC_E_NOT_SUPPORTED);
+                               return;
+                       }
+                       break;
+
+               default:
+                       ep0_do_stall(pcd, -DWC_E_NOT_SUPPORTED);
+                       return;
+
+               }
+               do_setup_in_status_phase(pcd);
+               break;
+
+       case UT_INTERFACE:
+               do_gadget_setup(pcd, &ctrl);
+               break;
+
+       case UT_ENDPOINT:
+               if (UGETW(ctrl.wValue) == UF_ENDPOINT_HALT) {
+                       ep = get_ep_by_addr(pcd, UGETW(ctrl.wIndex));
+                       if (ep == 0) {
+                               ep0_do_stall(pcd, -DWC_E_NOT_SUPPORTED);
+                               return;
+                       }
+                       ep->stopped = 1;
+                       dwc_otg_ep_set_stall(core_if, &ep->dwc_ep);
+               }
+               do_setup_in_status_phase(pcd);
+               break;
+       }
+}
+
+/**
+ * This function process the CLEAR_FEATURE Setup Commands.
+ */
+static inline void do_clear_feature(dwc_otg_pcd_t * pcd)
+{
+       usb_device_request_t ctrl = pcd->setup_pkt->req;
+       dwc_otg_pcd_ep_t *ep = 0;
+
+       DWC_DEBUGPL(DBG_PCD,
+                   "CLEAR_FEATURE:%02x.%02x v%04x i%04x l%04x\n",
+                   ctrl.bmRequestType, ctrl.bRequest,
+                   UGETW(ctrl.wValue), UGETW(ctrl.wIndex),
+                   UGETW(ctrl.wLength));
+
+       switch (UT_GET_RECIPIENT(ctrl.bmRequestType)) {
+       case UT_DEVICE:
+               switch (UGETW(ctrl.wValue)) {
+               case UF_DEVICE_REMOTE_WAKEUP:
+                       pcd->remote_wakeup_enable = 0;
+                       break;
+
+               case UF_TEST_MODE:
+                       /** @todo Add CLEAR_FEATURE for TEST modes. */
+                       break;
+
+               default:
+                       ep0_do_stall(pcd, -DWC_E_NOT_SUPPORTED);
+                       return;
+               }
+               do_setup_in_status_phase(pcd);
+               break;
+
+       case UT_ENDPOINT:
+               ep = get_ep_by_addr(pcd, UGETW(ctrl.wIndex));
+               if (ep == 0) {
+                       ep0_do_stall(pcd, -DWC_E_NOT_SUPPORTED);
+                       return;
+               }
+
+               pcd_clear_halt(pcd, ep);
+
+               break;
+       }
+}
+
+/**
+ * This function process the SET_ADDRESS Setup Commands.
+ */
+static inline void do_set_address(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_dev_if_t *dev_if = GET_CORE_IF(pcd)->dev_if;
+       usb_device_request_t ctrl = pcd->setup_pkt->req;
+
+       if (ctrl.bmRequestType == UT_DEVICE) {
+               dcfg_data_t dcfg = {.d32 = 0 };
+
+#ifdef DEBUG_EP0
+//                      DWC_DEBUGPL(DBG_PCDV, "SET_ADDRESS:%d\n", ctrl.wValue);
+#endif
+               dcfg.b.devaddr = UGETW(ctrl.wValue);
+               DWC_MODIFY_REG32(&dev_if->dev_global_regs->dcfg, 0, dcfg.d32);
+               do_setup_in_status_phase(pcd);
+       }
+}
+
+/**
+ *     This function processes SETUP commands. In Linux, the USB Command
+ *     processing is done in two places - the first being the PCD and the
+ *     second in the Gadget Driver (for example, the File-Backed Storage
+ *     Gadget Driver).
+ *
+ * <table>
+ * <tr><td>Command     </td><td>Driver </td><td>Description</td></tr>
+ *
+ * <tr><td>GET_STATUS </td><td>PCD </td><td>Command is processed as
+ * defined in chapter 9 of the USB 2.0 Specification chapter 9
+ * </td></tr>
+ *
+ * <tr><td>CLEAR_FEATURE </td><td>PCD </td><td>The Device and Endpoint
+ * requests are the ENDPOINT_HALT feature is procesed, all others the
+ * interface requests are ignored.</td></tr>
+ *
+ * <tr><td>SET_FEATURE </td><td>PCD </td><td>The Device and Endpoint
+ * requests are processed by the PCD.  Interface requests are passed
+ * to the Gadget Driver.</td></tr>
+ *
+ * <tr><td>SET_ADDRESS </td><td>PCD </td><td>Program the DCFG reg,
+ * with device address received </td></tr>
+ *
+ * <tr><td>GET_DESCRIPTOR </td><td>Gadget Driver </td><td>Return the
+ * requested descriptor</td></tr>
+ *
+ * <tr><td>SET_DESCRIPTOR </td><td>Gadget Driver </td><td>Optional -
+ * not implemented by any of the existing Gadget Drivers.</td></tr>
+ *
+ * <tr><td>SET_CONFIGURATION </td><td>Gadget Driver </td><td>Disable
+ * all EPs and enable EPs for new configuration.</td></tr>
+ *
+ * <tr><td>GET_CONFIGURATION </td><td>Gadget Driver </td><td>Return
+ * the current configuration</td></tr>
+ *
+ * <tr><td>SET_INTERFACE </td><td>Gadget Driver </td><td>Disable all
+ * EPs and enable EPs for new configuration.</td></tr>
+ *
+ * <tr><td>GET_INTERFACE </td><td>Gadget Driver </td><td>Return the
+ * current interface.</td></tr>
+ *
+ * <tr><td>SYNC_FRAME </td><td>PCD </td><td>Display debug
+ * message.</td></tr>
+ * </table>
+ *
+ * When the SETUP Phase Done interrupt occurs, the PCD SETUP commands are
+ * processed by pcd_setup. Calling the Function Driver's setup function from
+ * pcd_setup processes the gadget SETUP commands.
+ */
+static inline void pcd_setup(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       usb_device_request_t ctrl = pcd->setup_pkt->req;
+       dwc_otg_pcd_ep_t *ep0 = &pcd->ep0;
+
+       deptsiz0_data_t doeptsize0 = {.d32 = 0 };
+
+#ifdef DWC_UTE_CFI
+       int retval = 0;
+       struct cfi_usb_ctrlrequest cfi_req;
+#endif
+
+       doeptsize0.d32 = DWC_READ_REG32(&dev_if->out_ep_regs[0]->doeptsiz);
+
+       /** In BDMA more then 1 setup packet is not supported till 3.00a */
+       if (core_if->dma_enable && core_if->dma_desc_enable == 0
+           && (doeptsize0.b.supcnt < 2)
+           && (core_if->snpsid < OTG_CORE_REV_2_94a)) {
+               DWC_ERROR
+                   ("\n\n-----------    CANNOT handle > 1 setup packet in DMA mode\n\n");
+       }
+       if ((core_if->snpsid >= OTG_CORE_REV_3_00a)
+           && (core_if->dma_enable == 1) && (core_if->dma_desc_enable == 0)) {
+               ctrl =
+                   (pcd->setup_pkt +
+                    (3 - doeptsize0.b.supcnt - 1 +
+                     ep0->dwc_ep.stp_rollover))->req;
+       }
+#ifdef DEBUG_EP0
+       DWC_DEBUGPL(DBG_PCD, "SETUP %02x.%02x v%04x i%04x l%04x\n",
+                   ctrl.bmRequestType, ctrl.bRequest,
+                   UGETW(ctrl.wValue), UGETW(ctrl.wIndex),
+                   UGETW(ctrl.wLength));
+#endif
+
+       /* Clean up the request queue */
+       dwc_otg_request_nuke(ep0);
+       ep0->stopped = 0;
+
+       if (ctrl.bmRequestType & UE_DIR_IN) {
+               ep0->dwc_ep.is_in = 1;
+               pcd->ep0state = EP0_IN_DATA_PHASE;
+       } else {
+               ep0->dwc_ep.is_in = 0;
+               pcd->ep0state = EP0_OUT_DATA_PHASE;
+       }
+
+       if (UGETW(ctrl.wLength) == 0) {
+               ep0->dwc_ep.is_in = 1;
+               pcd->ep0state = EP0_IN_STATUS_PHASE;
+       }
+
+       if (UT_GET_TYPE(ctrl.bmRequestType) != UT_STANDARD) {
+
+#ifdef DWC_UTE_CFI
+               DWC_MEMCPY(&cfi_req, &ctrl, sizeof(usb_device_request_t));
+
+               //printk(KERN_ALERT "CFI: req_type=0x%02x; req=0x%02x\n",
+                               ctrl.bRequestType, ctrl.bRequest);
+               if (UT_GET_TYPE(cfi_req.bRequestType) == UT_VENDOR) {
+                       if (cfi_req.bRequest > 0xB0 && cfi_req.bRequest < 0xBF) {
+                               retval = cfi_setup(pcd, &cfi_req);
+                               if (retval < 0) {
+                                       ep0_do_stall(pcd, retval);
+                                       pcd->ep0_pending = 0;
+                                       return;
+                               }
+
+                               /* if need gadget setup then call it and check the retval */
+                               if (pcd->cfi->need_gadget_att) {
+                                       retval =
+                                           cfi_gadget_setup(pcd,
+                                                            &pcd->
+                                                            cfi->ctrl_req);
+                                       if (retval < 0) {
+                                               pcd->ep0_pending = 0;
+                                               return;
+                                       }
+                               }
+
+                               if (pcd->cfi->need_status_in_complete) {
+                                       do_setup_in_status_phase(pcd);
+                               }
+                               return;
+                       }
+               }
+#endif
+
+               /* handle non-standard (class/vendor) requests in the gadget driver */
+               do_gadget_setup(pcd, &ctrl);
+               return;
+       }
+
+       /** @todo NGS: Handle bad setup packet? */
+
+///////////////////////////////////////////
+//// --- Standard Request handling --- ////
+
+       switch (ctrl.bRequest) {
+       case UR_GET_STATUS:
+               do_get_status(pcd);
+               break;
+
+       case UR_CLEAR_FEATURE:
+               do_clear_feature(pcd);
+               break;
+
+       case UR_SET_FEATURE:
+               do_set_feature(pcd);
+               break;
+
+       case UR_SET_ADDRESS:
+               do_set_address(pcd);
+               break;
+
+       case UR_SET_INTERFACE:
+       case UR_SET_CONFIG:
+//              _pcd->request_config = 1;       /* Configuration changed */
+               do_gadget_setup(pcd, &ctrl);
+               break;
+
+       case UR_SYNCH_FRAME:
+               do_gadget_setup(pcd, &ctrl);
+               break;
+
+       default:
+               /* Call the Gadget Driver's setup functions */
+               do_gadget_setup(pcd, &ctrl);
+               break;
+       }
+}
+
+/**
+ * This function completes the ep0 control transfer.
+ */
+static int32_t ep0_complete_request(dwc_otg_pcd_ep_t * ep)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(ep->pcd);
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       dwc_otg_dev_in_ep_regs_t *in_ep_regs =
+           dev_if->in_ep_regs[ep->dwc_ep.num];
+#ifdef DEBUG_EP0
+       dwc_otg_dev_out_ep_regs_t *out_ep_regs =
+           dev_if->out_ep_regs[ep->dwc_ep.num];
+#endif
+       deptsiz0_data_t deptsiz;
+       dev_dma_desc_sts_t desc_sts;
+       dwc_otg_pcd_request_t *req;
+       int is_last = 0;
+       dwc_otg_pcd_t *pcd = ep->pcd;
+
+#ifdef DWC_UTE_CFI
+       struct cfi_usb_ctrlrequest *ctrlreq;
+       int retval = -DWC_E_NOT_SUPPORTED;
+#endif
+
+        desc_sts.b.bytes = 0;
+
+       if (pcd->ep0_pending && DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+               if (ep->dwc_ep.is_in) {
+#ifdef DEBUG_EP0
+                       DWC_DEBUGPL(DBG_PCDV, "Do setup OUT status phase\n");
+#endif
+                       do_setup_out_status_phase(pcd);
+               } else {
+#ifdef DEBUG_EP0
+                       DWC_DEBUGPL(DBG_PCDV, "Do setup IN status phase\n");
+#endif
+
+#ifdef DWC_UTE_CFI
+                       ctrlreq = &pcd->cfi->ctrl_req;
+
+                       if (UT_GET_TYPE(ctrlreq->bRequestType) == UT_VENDOR) {
+                               if (ctrlreq->bRequest > 0xB0
+                                   && ctrlreq->bRequest < 0xBF) {
+
+                                       /* Return if the PCD failed to handle the request */
+                                       if ((retval =
+                                            pcd->cfi->ops.
+                                            ctrl_write_complete(pcd->cfi,
+                                                                pcd)) < 0) {
+                                               CFI_INFO
+                                                   ("ERROR setting a new value in the PCD(%d)\n",
+                                                    retval);
+                                               ep0_do_stall(pcd, retval);
+                                               pcd->ep0_pending = 0;
+                                               return 0;
+                                       }
+
+                                       /* If the gadget needs to be notified on the request */
+                                       if (pcd->cfi->need_gadget_att == 1) {
+                                               //retval = do_gadget_setup(pcd, &pcd->cfi->ctrl_req);
+                                               retval =
+                                                   cfi_gadget_setup(pcd,
+                                                                    &pcd->cfi->
+                                                                    ctrl_req);
+
+                                               /* Return from the function if the gadget failed to process
+                                                * the request properly - this should never happen !!!
+                                                */
+                                               if (retval < 0) {
+                                                       CFI_INFO
+                                                           ("ERROR setting a new value in the gadget(%d)\n",
+                                                            retval);
+                                                       pcd->ep0_pending = 0;
+                                                       return 0;
+                                               }
+                                       }
+
+                                       CFI_INFO("%s: RETVAL=%d\n", __func__,
+                                                retval);
+                                       /* If we hit here then the PCD and the gadget has properly
+                                        * handled the request - so send the ZLP IN to the host.
+                                        */
+                                       /* @todo: MAS - decide whether we need to start the setup
+                                        * stage based on the need_setup value of the cfi object
+                                        */
+                                       do_setup_in_status_phase(pcd);
+                                       pcd->ep0_pending = 0;
+                                       return 1;
+                               }
+                       }
+#endif
+
+                       do_setup_in_status_phase(pcd);
+               }
+               pcd->ep0_pending = 0;
+               return 1;
+       }
+
+       if (DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+               return 0;
+       }
+       req = DWC_CIRCLEQ_FIRST(&ep->queue);
+
+       if (pcd->ep0state == EP0_OUT_STATUS_PHASE
+           || pcd->ep0state == EP0_IN_STATUS_PHASE) {
+               is_last = 1;
+       } else if (ep->dwc_ep.is_in) {
+               deptsiz.d32 = DWC_READ_REG32(&in_ep_regs->dieptsiz);
+               if (core_if->dma_desc_enable != 0)
+                       desc_sts = dev_if->in_desc_addr->status;
+#ifdef DEBUG_EP0
+               DWC_DEBUGPL(DBG_PCDV, "%d len=%d  xfersize=%d pktcnt=%d\n",
+                           ep->dwc_ep.num, ep->dwc_ep.xfer_len,
+                           deptsiz.b.xfersize, deptsiz.b.pktcnt);
+#endif
+
+               if (((core_if->dma_desc_enable == 0)
+                    && (deptsiz.b.xfersize == 0))
+                   || ((core_if->dma_desc_enable != 0)
+                       && (desc_sts.b.bytes == 0))) {
+                       req->actual = ep->dwc_ep.xfer_count;
+                       /* Is a Zero Len Packet needed? */
+                       if (req->sent_zlp) {
+#ifdef DEBUG_EP0
+                               DWC_DEBUGPL(DBG_PCD, "Setup Rx ZLP\n");
+#endif
+                               req->sent_zlp = 0;
+                       }
+                       do_setup_out_status_phase(pcd);
+               }
+       } else {
+               /* ep0-OUT */
+#ifdef DEBUG_EP0
+               deptsiz.d32 = DWC_READ_REG32(&out_ep_regs->doeptsiz);
+               DWC_DEBUGPL(DBG_PCDV, "%d len=%d xsize=%d pktcnt=%d\n",
+                           ep->dwc_ep.num, ep->dwc_ep.xfer_len,
+                           deptsiz.b.xfersize, deptsiz.b.pktcnt);
+#endif
+               req->actual = ep->dwc_ep.xfer_count;
+
+               /* Is a Zero Len Packet needed? */
+               if (req->sent_zlp) {
+#ifdef DEBUG_EP0
+                       DWC_DEBUGPL(DBG_PCDV, "Setup Tx ZLP\n");
+#endif
+                       req->sent_zlp = 0;
+               }
+               /* For older cores do setup in status phase in Slave/BDMA modes,
+                * starting from 3.00 do that only in slave, and for DMA modes
+                * just re-enable ep 0 OUT here*/
+               if (core_if->dma_enable == 0
+                   || (core_if->dma_desc_enable == 0
+                       && core_if->snpsid <= OTG_CORE_REV_2_94a)) {
+                       do_setup_in_status_phase(pcd);
+               } else if (core_if->snpsid >= OTG_CORE_REV_3_00a) {
+                       DWC_DEBUGPL(DBG_PCDV,
+                                   "Enable out ep before in status phase\n");
+                       ep0_out_start(core_if, pcd);
+               }
+       }
+
+       /* Complete the request */
+       if (is_last) {
+               dwc_otg_request_done(ep, req, 0);
+               ep->dwc_ep.start_xfer_buff = 0;
+               ep->dwc_ep.xfer_buff = 0;
+               ep->dwc_ep.xfer_len = 0;
+               return 1;
+       }
+       return 0;
+}
+
+#ifdef DWC_UTE_CFI
+/**
+ * This function calculates traverses all the CFI DMA descriptors and
+ * and accumulates the bytes that are left to be transfered.
+ *
+ * @return The total bytes left to transfered, or a negative value as failure
+ */
+static inline int cfi_calc_desc_residue(dwc_otg_pcd_ep_t * ep)
+{
+       int32_t ret = 0;
+       int i;
+       struct dwc_otg_dma_desc *ddesc = NULL;
+       struct cfi_ep *cfiep;
+
+       /* See if the pcd_ep has its respective cfi_ep mapped */
+       cfiep = get_cfi_ep_by_pcd_ep(ep->pcd->cfi, ep);
+       if (!cfiep) {
+               CFI_INFO("%s: Failed to find ep\n", __func__);
+               return -1;
+       }
+
+       ddesc = ep->dwc_ep.descs;
+
+       for (i = 0; (i < cfiep->desc_count) && (i < MAX_DMA_DESCS_PER_EP); i++) {
+
+#if defined(PRINT_CFI_DMA_DESCS)
+               print_desc(ddesc, ep->ep.name, i);
+#endif
+               ret += ddesc->status.b.bytes;
+               ddesc++;
+       }
+
+       if (ret)
+               CFI_INFO("!!!!!!!!!! WARNING (%s) - residue=%d\n", __func__,
+                        ret);
+
+       return ret;
+}
+#endif
+
+/**
+ * This function completes the request for the EP. If there are
+ * additional requests for the EP in the queue they will be started.
+ */
+static void complete_ep(dwc_otg_pcd_ep_t * ep)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(ep->pcd);
+       struct device *dev = dwc_otg_pcd_to_dev(ep->pcd);
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       dwc_otg_dev_in_ep_regs_t *in_ep_regs =
+           dev_if->in_ep_regs[ep->dwc_ep.num];
+       deptsiz_data_t deptsiz;
+       dev_dma_desc_sts_t desc_sts;
+       dwc_otg_pcd_request_t *req = 0;
+       dwc_otg_dev_dma_desc_t *dma_desc;
+       uint32_t byte_count = 0;
+       int is_last = 0;
+       int i;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s() %d-%s\n", __func__, ep->dwc_ep.num,
+                   (ep->dwc_ep.is_in ? "IN" : "OUT"));
+
+       /* Get any pending requests */
+       if (!DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+               req = DWC_CIRCLEQ_FIRST(&ep->queue);
+               if (!req) {
+                       DWC_PRINTF("complete_ep 0x%p, req = NULL!\n", ep);
+                       return;
+               }
+       } else {
+               DWC_PRINTF("complete_ep 0x%p, ep->queue empty!\n", ep);
+               return;
+       }
+
+       DWC_DEBUGPL(DBG_PCD, "Requests %d\n", ep->pcd->request_pending);
+
+       if (ep->dwc_ep.is_in) {
+               deptsiz.d32 = DWC_READ_REG32(&in_ep_regs->dieptsiz);
+
+               if (core_if->dma_enable) {
+                       if (core_if->dma_desc_enable == 0) {
+                               if (deptsiz.b.xfersize == 0
+                                   && deptsiz.b.pktcnt == 0) {
+                                       byte_count =
+                                           ep->dwc_ep.xfer_len -
+                                           ep->dwc_ep.xfer_count;
+
+                                       ep->dwc_ep.xfer_buff += byte_count;
+                                       ep->dwc_ep.dma_addr += byte_count;
+                                       ep->dwc_ep.xfer_count += byte_count;
+
+                                       DWC_DEBUGPL(DBG_PCDV,
+                                                   "%d-%s len=%d  xfersize=%d pktcnt=%d\n",
+                                                   ep->dwc_ep.num,
+                                                   (ep->dwc_ep.
+                                                    is_in ? "IN" : "OUT"),
+                                                   ep->dwc_ep.xfer_len,
+                                                   deptsiz.b.xfersize,
+                                                   deptsiz.b.pktcnt);
+
+                                       if (ep->dwc_ep.xfer_len <
+                                           ep->dwc_ep.total_len) {
+                                               dwc_otg_ep_start_transfer
+                                                   (core_if, &ep->dwc_ep);
+                                       } else if (ep->dwc_ep.sent_zlp) {
+                                               /*
+                                                * This fragment of code should initiate 0
+                                                * length transfer in case if it is queued
+                                                * a transfer with size divisible to EPs max
+                                                * packet size and with usb_request zero field
+                                                * is set, which means that after data is transfered,
+                                                * it is also should be transfered
+                                                * a 0 length packet at the end. For Slave and
+                                                * Buffer DMA modes in this case SW has
+                                                * to initiate 2 transfers one with transfer size,
+                                                * and the second with 0 size. For Descriptor
+                                                * DMA mode SW is able to initiate a transfer,
+                                                * which will handle all the packets including
+                                                * the last  0 length.
+                                                */
+                                               ep->dwc_ep.sent_zlp = 0;
+                                               dwc_otg_ep_start_zl_transfer
+                                                   (core_if, &ep->dwc_ep);
+                                       } else {
+                                               is_last = 1;
+                                       }
+                               } else {
+                                       if (ep->dwc_ep.type ==
+                                           DWC_OTG_EP_TYPE_ISOC) {
+                                               req->actual = 0;
+                                               dwc_otg_request_done(ep, req, 0);
+
+                                               ep->dwc_ep.start_xfer_buff = 0;
+                                               ep->dwc_ep.xfer_buff = 0;
+                                               ep->dwc_ep.xfer_len = 0;
+
+                                               /* If there is a request in the queue start it. */
+                                               start_next_request(ep);
+                                       } else
+                                               DWC_WARN
+                                               ("Incomplete transfer (%d - %s [siz=%d pkt=%d])\n",
+                                               ep->dwc_ep.num,
+                                               (ep->dwc_ep.is_in ? "IN" : "OUT"),
+                                               deptsiz.b.xfersize,
+                                               deptsiz.b.pktcnt);
+                               }
+                       } else {
+                               dma_desc = ep->dwc_ep.desc_addr;
+                               byte_count = 0;
+                               ep->dwc_ep.sent_zlp = 0;
+
+#ifdef DWC_UTE_CFI
+                               CFI_INFO("%s: BUFFER_MODE=%d\n", __func__,
+                                        ep->dwc_ep.buff_mode);
+                               if (ep->dwc_ep.buff_mode != BM_STANDARD) {
+                                       int residue;
+
+                                       residue = cfi_calc_desc_residue(ep);
+                                       if (residue < 0)
+                                               return;
+
+                                       byte_count = residue;
+                               } else {
+#endif
+                                       for (i = 0; i < ep->dwc_ep.desc_cnt;
+                                            ++i) {
+                                       desc_sts = dma_desc->status;
+                                       byte_count += desc_sts.b.bytes;
+                                       dma_desc++;
+                               }
+#ifdef DWC_UTE_CFI
+                               }
+#endif
+                               if (byte_count == 0) {
+                                       ep->dwc_ep.xfer_count =
+                                           ep->dwc_ep.total_len;
+                                       is_last = 1;
+                               } else {
+                                       DWC_WARN("Incomplete transfer\n");
+                               }
+                       }
+               } else {
+                       if (deptsiz.b.xfersize == 0 && deptsiz.b.pktcnt == 0) {
+                               DWC_DEBUGPL(DBG_PCDV,
+                                           "%d-%s len=%d  xfersize=%d pktcnt=%d\n",
+                                           ep->dwc_ep.num,
+                                           ep->dwc_ep.is_in ? "IN" : "OUT",
+                                           ep->dwc_ep.xfer_len,
+                                           deptsiz.b.xfersize,
+                                           deptsiz.b.pktcnt);
+
+                               /*      Check if the whole transfer was completed,
+                                *      if no, setup transfer for next portion of data
+                                */
+                               if (ep->dwc_ep.xfer_len < ep->dwc_ep.total_len) {
+                                       dwc_otg_ep_start_transfer(core_if,
+                                                                 &ep->dwc_ep);
+                               } else if (ep->dwc_ep.sent_zlp) {
+                                       /*
+                                        * This fragment of code should initiate 0
+                                        * length trasfer in case if it is queued
+                                        * a trasfer with size divisible to EPs max
+                                        * packet size and with usb_request zero field
+                                        * is set, which means that after data is transfered,
+                                        * it is also should be transfered
+                                        * a 0 length packet at the end. For Slave and
+                                        * Buffer DMA modes in this case SW has
+                                        * to initiate 2 transfers one with transfer size,
+                                        * and the second with 0 size. For Desriptor
+                                        * DMA mode SW is able to initiate a transfer,
+                                        * which will handle all the packets including
+                                        * the last  0 legth.
+                                        */
+                                       ep->dwc_ep.sent_zlp = 0;
+                                       dwc_otg_ep_start_zl_transfer(core_if,
+                                                                    &ep->dwc_ep);
+                               } else {
+                                       is_last = 1;
+                               }
+                       } else {
+                               DWC_WARN
+                                   ("Incomplete transfer (%d-%s [siz=%d pkt=%d])\n",
+                                    ep->dwc_ep.num,
+                                    (ep->dwc_ep.is_in ? "IN" : "OUT"),
+                                    deptsiz.b.xfersize, deptsiz.b.pktcnt);
+                       }
+               }
+       } else {
+               dwc_otg_dev_out_ep_regs_t *out_ep_regs =
+                   dev_if->out_ep_regs[ep->dwc_ep.num];
+               desc_sts.d32 = 0;
+               if (core_if->dma_enable) {
+                       if (core_if->dma_desc_enable) {
+                               dma_desc = ep->dwc_ep.desc_addr;
+                               byte_count = 0;
+                               ep->dwc_ep.sent_zlp = 0;
+
+#ifdef DWC_UTE_CFI
+                               CFI_INFO("%s: BUFFER_MODE=%d\n", __func__,
+                                        ep->dwc_ep.buff_mode);
+                               if (ep->dwc_ep.buff_mode != BM_STANDARD) {
+                                       int residue;
+                                       residue = cfi_calc_desc_residue(ep);
+                                       if (residue < 0)
+                                               return;
+                                       byte_count = residue;
+                               } else {
+#endif
+
+                                       for (i = 0; i < ep->dwc_ep.desc_cnt;
+                                            ++i) {
+                                               desc_sts = dma_desc->status;
+                                               byte_count += desc_sts.b.bytes;
+                                               dma_desc++;
+                                       }
+
+#ifdef DWC_UTE_CFI
+                               }
+#endif
+                               /* Checking for interrupt Out transfers with not
+                                * dword aligned mps sizes
+                                */
+                               if (ep->dwc_ep.type == DWC_OTG_EP_TYPE_INTR &&
+                                                       (ep->dwc_ep.maxpacket%4)) {
+                                       ep->dwc_ep.xfer_count =
+                                           ep->dwc_ep.total_len - byte_count;
+                                       if ((ep->dwc_ep.xfer_len %
+                                            ep->dwc_ep.maxpacket)
+                                           && (ep->dwc_ep.xfer_len /
+                                               ep->dwc_ep.maxpacket <
+                                               MAX_DMA_DESC_CNT))
+                                               ep->dwc_ep.xfer_len -=
+                                                   (ep->dwc_ep.desc_cnt -
+                                                    1) * ep->dwc_ep.maxpacket +
+                                                   ep->dwc_ep.xfer_len %
+                                                   ep->dwc_ep.maxpacket;
+                                       else
+                                               ep->dwc_ep.xfer_len -=
+                                                   ep->dwc_ep.desc_cnt *
+                                                   ep->dwc_ep.maxpacket;
+                                       if (ep->dwc_ep.xfer_len > 0) {
+                                               dwc_otg_ep_start_transfer
+                                                   (core_if, &ep->dwc_ep);
+                                       } else {
+                                               is_last = 1;
+                                       }
+                               } else {
+                                       ep->dwc_ep.xfer_count =
+                                           ep->dwc_ep.total_len - byte_count +
+                                           ((4 -
+                                             (ep->dwc_ep.
+                                              total_len & 0x3)) & 0x3);
+                                       is_last = 1;
+                               }
+                       } else {
+                               deptsiz.d32 = 0;
+                               deptsiz.d32 =
+                                   DWC_READ_REG32(&out_ep_regs->doeptsiz);
+
+                               byte_count = (ep->dwc_ep.xfer_len -
+                                             ep->dwc_ep.xfer_count -
+                                             deptsiz.b.xfersize);
+                               ep->dwc_ep.xfer_buff += byte_count;
+                               ep->dwc_ep.dma_addr += byte_count;
+                               ep->dwc_ep.xfer_count += byte_count;
+
+                               /*      Check if the whole transfer was completed,
+                                *      if no, setup transfer for next portion of data
+                                */
+                               if (ep->dwc_ep.xfer_len < ep->dwc_ep.total_len) {
+                                       dwc_otg_ep_start_transfer(core_if,
+                                                                 &ep->dwc_ep);
+                               } else if (ep->dwc_ep.sent_zlp) {
+                                       /*
+                                        * This fragment of code should initiate 0
+                                        * length trasfer in case if it is queued
+                                        * a trasfer with size divisible to EPs max
+                                        * packet size and with usb_request zero field
+                                        * is set, which means that after data is transfered,
+                                        * it is also should be transfered
+                                        * a 0 length packet at the end. For Slave and
+                                        * Buffer DMA modes in this case SW has
+                                        * to initiate 2 transfers one with transfer size,
+                                        * and the second with 0 size. For Desriptor
+                                        * DMA mode SW is able to initiate a transfer,
+                                        * which will handle all the packets including
+                                        * the last  0 legth.
+                                        */
+                                       ep->dwc_ep.sent_zlp = 0;
+                                       dwc_otg_ep_start_zl_transfer(core_if,
+                                                                    &ep->dwc_ep);
+                               } else {
+                                       is_last = 1;
+                               }
+                       }
+               } else {
+                       /*      Check if the whole transfer was completed,
+                        *      if no, setup transfer for next portion of data
+                        */
+                       if (ep->dwc_ep.xfer_len < ep->dwc_ep.total_len) {
+                               dwc_otg_ep_start_transfer(core_if, &ep->dwc_ep);
+                       } else if (ep->dwc_ep.sent_zlp) {
+                               /*
+                                * This fragment of code should initiate 0
+                                * length transfer in case if it is queued
+                                * a transfer with size divisible to EPs max
+                                * packet size and with usb_request zero field
+                                * is set, which means that after data is transfered,
+                                * it is also should be transfered
+                                * a 0 length packet at the end. For Slave and
+                                * Buffer DMA modes in this case SW has
+                                * to initiate 2 transfers one with transfer size,
+                                * and the second with 0 size. For Descriptor
+                                * DMA mode SW is able to initiate a transfer,
+                                * which will handle all the packets including
+                                * the last  0 length.
+                                */
+                               ep->dwc_ep.sent_zlp = 0;
+                               dwc_otg_ep_start_zl_transfer(core_if,
+                                                            &ep->dwc_ep);
+                       } else {
+                               is_last = 1;
+                       }
+               }
+
+               DWC_DEBUGPL(DBG_PCDV,
+                           "addr %p,    %d-%s len=%d cnt=%d xsize=%d pktcnt=%d\n",
+                           &out_ep_regs->doeptsiz, ep->dwc_ep.num,
+                           ep->dwc_ep.is_in ? "IN" : "OUT",
+                           ep->dwc_ep.xfer_len, ep->dwc_ep.xfer_count,
+                           deptsiz.b.xfersize, deptsiz.b.pktcnt);
+       }
+
+       /* Complete the request */
+       if (is_last) {
+#ifdef DWC_UTE_CFI
+               if (ep->dwc_ep.buff_mode != BM_STANDARD) {
+                       req->actual = ep->dwc_ep.cfi_req_len - byte_count;
+               } else {
+#endif
+                       req->actual = ep->dwc_ep.xfer_count;
+#ifdef DWC_UTE_CFI
+               }
+#endif
+               if (req->dw_align_buf) {
+                       if (!ep->dwc_ep.is_in) {
+                               dwc_memcpy(req->buf, req->dw_align_buf, req->length);
+                       }
+                       DWC_DMA_FREE(dev, req->length, req->dw_align_buf,
+                                    req->dw_align_buf_dma);
+               }
+
+               dwc_otg_request_done(ep, req, 0);
+
+               ep->dwc_ep.start_xfer_buff = 0;
+               ep->dwc_ep.xfer_buff = 0;
+               ep->dwc_ep.xfer_len = 0;
+
+               /* If there is a request in the queue start it. */
+               start_next_request(ep);
+       }
+}
+
+#ifdef DWC_EN_ISOC
+
+/**
+ * This function BNA interrupt for Isochronous EPs
+ *
+ */
+static void dwc_otg_pcd_handle_iso_bna(dwc_otg_pcd_ep_t * ep)
+{
+       dwc_ep_t *dwc_ep = &ep->dwc_ep;
+       volatile uint32_t *addr;
+       depctl_data_t depctl = {.d32 = 0 };
+       dwc_otg_pcd_t *pcd = ep->pcd;
+       dwc_otg_dev_dma_desc_t *dma_desc;
+       int i;
+
+       dma_desc =
+           dwc_ep->iso_desc_addr + dwc_ep->desc_cnt * (dwc_ep->proc_buf_num);
+
+       if (dwc_ep->is_in) {
+               dev_dma_desc_sts_t sts = {.d32 = 0 };
+               for (i = 0; i < dwc_ep->desc_cnt; ++i, ++dma_desc) {
+                       sts.d32 = dma_desc->status.d32;
+                       sts.b_iso_in.bs = BS_HOST_READY;
+                       dma_desc->status.d32 = sts.d32;
+               }
+       } else {
+               dev_dma_desc_sts_t sts = {.d32 = 0 };
+               for (i = 0; i < dwc_ep->desc_cnt; ++i, ++dma_desc) {
+                       sts.d32 = dma_desc->status.d32;
+                       sts.b_iso_out.bs = BS_HOST_READY;
+                       dma_desc->status.d32 = sts.d32;
+               }
+       }
+
+       if (dwc_ep->is_in == 0) {
+               addr =
+                   &GET_CORE_IF(pcd)->dev_if->out_ep_regs[dwc_ep->
+                                                          num]->doepctl;
+       } else {
+               addr =
+                   &GET_CORE_IF(pcd)->dev_if->in_ep_regs[dwc_ep->num]->diepctl;
+       }
+       depctl.b.epena = 1;
+       DWC_MODIFY_REG32(addr, depctl.d32, depctl.d32);
+}
+
+/**
+ * This function sets latest iso packet information(non-PTI mode)
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ *
+ */
+void set_current_pkt_info(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       deptsiz_data_t deptsiz = {.d32 = 0 };
+       dma_addr_t dma_addr;
+       uint32_t offset;
+
+       if (ep->proc_buf_num)
+               dma_addr = ep->dma_addr1;
+       else
+               dma_addr = ep->dma_addr0;
+
+       if (ep->is_in) {
+               deptsiz.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->
+                                  in_ep_regs[ep->num]->dieptsiz);
+               offset = ep->data_per_frame;
+       } else {
+               deptsiz.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->
+                                  out_ep_regs[ep->num]->doeptsiz);
+               offset =
+                   ep->data_per_frame +
+                   (0x4 & (0x4 - (ep->data_per_frame & 0x3)));
+       }
+
+       if (!deptsiz.b.xfersize) {
+               ep->pkt_info[ep->cur_pkt].length = ep->data_per_frame;
+               ep->pkt_info[ep->cur_pkt].offset =
+                   ep->cur_pkt_dma_addr - dma_addr;
+               ep->pkt_info[ep->cur_pkt].status = 0;
+       } else {
+               ep->pkt_info[ep->cur_pkt].length = ep->data_per_frame;
+               ep->pkt_info[ep->cur_pkt].offset =
+                   ep->cur_pkt_dma_addr - dma_addr;
+               ep->pkt_info[ep->cur_pkt].status = -DWC_E_NO_DATA;
+       }
+       ep->cur_pkt_addr += offset;
+       ep->cur_pkt_dma_addr += offset;
+       ep->cur_pkt++;
+}
+
+/**
+ * This function sets latest iso packet information(DDMA mode)
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param dwc_ep The EP to start the transfer on.
+ *
+ */
+static void set_ddma_iso_pkts_info(dwc_otg_core_if_t * core_if,
+                                  dwc_ep_t * dwc_ep)
+{
+       dwc_otg_dev_dma_desc_t *dma_desc;
+       dev_dma_desc_sts_t sts = {.d32 = 0 };
+       iso_pkt_info_t *iso_packet;
+       uint32_t data_per_desc;
+       uint32_t offset;
+       int i, j;
+
+       iso_packet = dwc_ep->pkt_info;
+
+       /** Reinit closed DMA Descriptors*/
+       /** ISO OUT EP */
+       if (dwc_ep->is_in == 0) {
+               dma_desc =
+                   dwc_ep->iso_desc_addr +
+                   dwc_ep->desc_cnt * dwc_ep->proc_buf_num;
+               offset = 0;
+
+               for (i = 0; i < dwc_ep->desc_cnt - dwc_ep->pkt_per_frm;
+                    i += dwc_ep->pkt_per_frm) {
+                       for (j = 0; j < dwc_ep->pkt_per_frm; ++j) {
+                               data_per_desc =
+                                   ((j + 1) * dwc_ep->maxpacket >
+                                    dwc_ep->
+                                    data_per_frame) ? dwc_ep->data_per_frame -
+                                   j * dwc_ep->maxpacket : dwc_ep->maxpacket;
+                               data_per_desc +=
+                                   (data_per_desc % 4) ? (4 -
+                                                          data_per_desc %
+                                                          4) : 0;
+
+                               sts.d32 = dma_desc->status.d32;
+
+                               /* Write status in iso_packet_decsriptor  */
+                               iso_packet->status =
+                                   sts.b_iso_out.rxsts +
+                                   (sts.b_iso_out.bs ^ BS_DMA_DONE);
+                               if (iso_packet->status) {
+                                       iso_packet->status = -DWC_E_NO_DATA;
+                               }
+
+                               /* Received data length */
+                               if (!sts.b_iso_out.rxbytes) {
+                                       iso_packet->length =
+                                           data_per_desc -
+                                           sts.b_iso_out.rxbytes;
+                               } else {
+                                       iso_packet->length =
+                                           data_per_desc -
+                                           sts.b_iso_out.rxbytes + (4 -
+                                                                    dwc_ep->data_per_frame
+                                                                    % 4);
+                               }
+
+                               iso_packet->offset = offset;
+
+                               offset += data_per_desc;
+                               dma_desc++;
+                               iso_packet++;
+                       }
+               }
+
+               for (j = 0; j < dwc_ep->pkt_per_frm - 1; ++j) {
+                       data_per_desc =
+                           ((j + 1) * dwc_ep->maxpacket >
+                            dwc_ep->data_per_frame) ? dwc_ep->data_per_frame -
+                           j * dwc_ep->maxpacket : dwc_ep->maxpacket;
+                       data_per_desc +=
+                           (data_per_desc % 4) ? (4 - data_per_desc % 4) : 0;
+
+                       sts.d32 = dma_desc->status.d32;
+
+                       /* Write status in iso_packet_decsriptor  */
+                       iso_packet->status =
+                           sts.b_iso_out.rxsts +
+                           (sts.b_iso_out.bs ^ BS_DMA_DONE);
+                       if (iso_packet->status) {
+                               iso_packet->status = -DWC_E_NO_DATA;
+                       }
+
+                       /* Received data length */
+                       iso_packet->length =
+                           dwc_ep->data_per_frame - sts.b_iso_out.rxbytes;
+
+                       iso_packet->offset = offset;
+
+                       offset += data_per_desc;
+                       iso_packet++;
+                       dma_desc++;
+               }
+
+               sts.d32 = dma_desc->status.d32;
+
+               /* Write status in iso_packet_decsriptor  */
+               iso_packet->status =
+                   sts.b_iso_out.rxsts + (sts.b_iso_out.bs ^ BS_DMA_DONE);
+               if (iso_packet->status) {
+                       iso_packet->status = -DWC_E_NO_DATA;
+               }
+               /* Received data length */
+               if (!sts.b_iso_out.rxbytes) {
+                       iso_packet->length =
+                           dwc_ep->data_per_frame - sts.b_iso_out.rxbytes;
+               } else {
+                       iso_packet->length =
+                           dwc_ep->data_per_frame - sts.b_iso_out.rxbytes +
+                           (4 - dwc_ep->data_per_frame % 4);
+               }
+
+               iso_packet->offset = offset;
+       } else {
+/** ISO IN EP */
+
+               dma_desc =
+                   dwc_ep->iso_desc_addr +
+                   dwc_ep->desc_cnt * dwc_ep->proc_buf_num;
+
+               for (i = 0; i < dwc_ep->desc_cnt - 1; i++) {
+                       sts.d32 = dma_desc->status.d32;
+
+                       /* Write status in iso packet descriptor */
+                       iso_packet->status =
+                           sts.b_iso_in.txsts +
+                           (sts.b_iso_in.bs ^ BS_DMA_DONE);
+                       if (iso_packet->status != 0) {
+                               iso_packet->status = -DWC_E_NO_DATA;
+
+                       }
+                       /* Bytes has been transfered */
+                       iso_packet->length =
+                           dwc_ep->data_per_frame - sts.b_iso_in.txbytes;
+
+                       dma_desc++;
+                       iso_packet++;
+               }
+
+               sts.d32 = dma_desc->status.d32;
+               while (sts.b_iso_in.bs == BS_DMA_BUSY) {
+                       sts.d32 = dma_desc->status.d32;
+               }
+
+               /* Write status in iso packet descriptor ??? do be done with ERROR codes */
+               iso_packet->status =
+                   sts.b_iso_in.txsts + (sts.b_iso_in.bs ^ BS_DMA_DONE);
+               if (iso_packet->status != 0) {
+                       iso_packet->status = -DWC_E_NO_DATA;
+               }
+
+               /* Bytes has been transfered */
+               iso_packet->length =
+                   dwc_ep->data_per_frame - sts.b_iso_in.txbytes;
+       }
+}
+
+/**
+ * This function reinitialize DMA Descriptors for Isochronous transfer
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param dwc_ep The EP to start the transfer on.
+ *
+ */
+static void reinit_ddma_iso_xfer(dwc_otg_core_if_t * core_if, dwc_ep_t * dwc_ep)
+{
+       int i, j;
+       dwc_otg_dev_dma_desc_t *dma_desc;
+       dma_addr_t dma_ad;
+       volatile uint32_t *addr;
+       dev_dma_desc_sts_t sts = {.d32 = 0 };
+       uint32_t data_per_desc;
+
+       if (dwc_ep->is_in == 0) {
+               addr = &core_if->dev_if->out_ep_regs[dwc_ep->num]->doepctl;
+       } else {
+               addr = &core_if->dev_if->in_ep_regs[dwc_ep->num]->diepctl;
+       }
+
+       if (dwc_ep->proc_buf_num == 0) {
+               /** Buffer 0 descriptors setup */
+               dma_ad = dwc_ep->dma_addr0;
+       } else {
+               /** Buffer 1 descriptors setup */
+               dma_ad = dwc_ep->dma_addr1;
+       }
+
+       /** Reinit closed DMA Descriptors*/
+       /** ISO OUT EP */
+       if (dwc_ep->is_in == 0) {
+               dma_desc =
+                   dwc_ep->iso_desc_addr +
+                   dwc_ep->desc_cnt * dwc_ep->proc_buf_num;
+
+               sts.b_iso_out.bs = BS_HOST_READY;
+               sts.b_iso_out.rxsts = 0;
+               sts.b_iso_out.l = 0;
+               sts.b_iso_out.sp = 0;
+               sts.b_iso_out.ioc = 0;
+               sts.b_iso_out.pid = 0;
+               sts.b_iso_out.framenum = 0;
+
+               for (i = 0; i < dwc_ep->desc_cnt - dwc_ep->pkt_per_frm;
+                    i += dwc_ep->pkt_per_frm) {
+                       for (j = 0; j < dwc_ep->pkt_per_frm; ++j) {
+                               data_per_desc =
+                                   ((j + 1) * dwc_ep->maxpacket >
+                                    dwc_ep->
+                                    data_per_frame) ? dwc_ep->data_per_frame -
+                                   j * dwc_ep->maxpacket : dwc_ep->maxpacket;
+                               data_per_desc +=
+                                   (data_per_desc % 4) ? (4 -
+                                                          data_per_desc %
+                                                          4) : 0;
+                               sts.b_iso_out.rxbytes = data_per_desc;
+                               dma_desc->buf = dma_ad;
+                               dma_desc->status.d32 = sts.d32;
+
+                               dma_ad += data_per_desc;
+                               dma_desc++;
+                       }
+               }
+
+               for (j = 0; j < dwc_ep->pkt_per_frm - 1; ++j) {
+
+                       data_per_desc =
+                           ((j + 1) * dwc_ep->maxpacket >
+                            dwc_ep->data_per_frame) ? dwc_ep->data_per_frame -
+                           j * dwc_ep->maxpacket : dwc_ep->maxpacket;
+                       data_per_desc +=
+                           (data_per_desc % 4) ? (4 - data_per_desc % 4) : 0;
+                       sts.b_iso_out.rxbytes = data_per_desc;
+
+                       dma_desc->buf = dma_ad;
+                       dma_desc->status.d32 = sts.d32;
+
+                       dma_desc++;
+                       dma_ad += data_per_desc;
+               }
+
+               sts.b_iso_out.ioc = 1;
+               sts.b_iso_out.l = dwc_ep->proc_buf_num;
+
+               data_per_desc =
+                   ((j + 1) * dwc_ep->maxpacket >
+                    dwc_ep->data_per_frame) ? dwc_ep->data_per_frame -
+                   j * dwc_ep->maxpacket : dwc_ep->maxpacket;
+               data_per_desc +=
+                   (data_per_desc % 4) ? (4 - data_per_desc % 4) : 0;
+               sts.b_iso_out.rxbytes = data_per_desc;
+
+               dma_desc->buf = dma_ad;
+               dma_desc->status.d32 = sts.d32;
+       } else {
+/** ISO IN EP */
+
+               dma_desc =
+                   dwc_ep->iso_desc_addr +
+                   dwc_ep->desc_cnt * dwc_ep->proc_buf_num;
+
+               sts.b_iso_in.bs = BS_HOST_READY;
+               sts.b_iso_in.txsts = 0;
+               sts.b_iso_in.sp = 0;
+               sts.b_iso_in.ioc = 0;
+               sts.b_iso_in.pid = dwc_ep->pkt_per_frm;
+               sts.b_iso_in.framenum = dwc_ep->next_frame;
+               sts.b_iso_in.txbytes = dwc_ep->data_per_frame;
+               sts.b_iso_in.l = 0;
+
+               for (i = 0; i < dwc_ep->desc_cnt - 1; i++) {
+                       dma_desc->buf = dma_ad;
+                       dma_desc->status.d32 = sts.d32;
+
+                       sts.b_iso_in.framenum += dwc_ep->bInterval;
+                       dma_ad += dwc_ep->data_per_frame;
+                       dma_desc++;
+               }
+
+               sts.b_iso_in.ioc = 1;
+               sts.b_iso_in.l = dwc_ep->proc_buf_num;
+
+               dma_desc->buf = dma_ad;
+               dma_desc->status.d32 = sts.d32;
+
+               dwc_ep->next_frame =
+                   sts.b_iso_in.framenum + dwc_ep->bInterval * 1;
+       }
+       dwc_ep->proc_buf_num = (dwc_ep->proc_buf_num ^ 1) & 0x1;
+}
+
+/**
+ * This function is to handle Iso EP transfer complete interrupt
+ * in case Iso out packet was dropped
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param dwc_ep The EP for wihich transfer complete was asserted
+ *
+ */
+static uint32_t handle_iso_out_pkt_dropped(dwc_otg_core_if_t * core_if,
+                                          dwc_ep_t * dwc_ep)
+{
+       uint32_t dma_addr;
+       uint32_t drp_pkt;
+       uint32_t drp_pkt_cnt;
+       deptsiz_data_t deptsiz = {.d32 = 0 };
+       depctl_data_t depctl = {.d32 = 0 };
+       int i;
+
+       deptsiz.d32 =
+           DWC_READ_REG32(&core_if->dev_if->
+                          out_ep_regs[dwc_ep->num]->doeptsiz);
+
+       drp_pkt = dwc_ep->pkt_cnt - deptsiz.b.pktcnt;
+       drp_pkt_cnt = dwc_ep->pkt_per_frm - (drp_pkt % dwc_ep->pkt_per_frm);
+
+       /* Setting dropped packets status */
+       for (i = 0; i < drp_pkt_cnt; ++i) {
+               dwc_ep->pkt_info[drp_pkt].status = -DWC_E_NO_DATA;
+               drp_pkt++;
+               deptsiz.b.pktcnt--;
+       }
+
+       if (deptsiz.b.pktcnt > 0) {
+               deptsiz.b.xfersize =
+                   dwc_ep->xfer_len - (dwc_ep->pkt_cnt -
+                                       deptsiz.b.pktcnt) * dwc_ep->maxpacket;
+       } else {
+               deptsiz.b.xfersize = 0;
+               deptsiz.b.pktcnt = 0;
+       }
+
+       DWC_WRITE_REG32(&core_if->dev_if->out_ep_regs[dwc_ep->num]->doeptsiz,
+                       deptsiz.d32);
+
+       if (deptsiz.b.pktcnt > 0) {
+               if (dwc_ep->proc_buf_num) {
+                       dma_addr =
+                           dwc_ep->dma_addr1 + dwc_ep->xfer_len -
+                           deptsiz.b.xfersize;
+               } else {
+                       dma_addr =
+                           dwc_ep->dma_addr0 + dwc_ep->xfer_len -
+                           deptsiz.b.xfersize;;
+               }
+
+               DWC_WRITE_REG32(&core_if->dev_if->
+                               out_ep_regs[dwc_ep->num]->doepdma, dma_addr);
+
+               /** Re-enable endpoint, clear nak  */
+               depctl.d32 = 0;
+               depctl.b.epena = 1;
+               depctl.b.cnak = 1;
+
+               DWC_MODIFY_REG32(&core_if->dev_if->
+                                out_ep_regs[dwc_ep->num]->doepctl, depctl.d32,
+                                depctl.d32);
+               return 0;
+       } else {
+               return 1;
+       }
+}
+
+/**
+ * This function sets iso packets information(PTI mode)
+ *
+ * @param core_if Programming view of DWC_otg controller.
+ * @param ep The EP to start the transfer on.
+ *
+ */
+static uint32_t set_iso_pkts_info(dwc_otg_core_if_t * core_if, dwc_ep_t * ep)
+{
+       int i, j;
+       dma_addr_t dma_ad;
+       iso_pkt_info_t *packet_info = ep->pkt_info;
+       uint32_t offset;
+       uint32_t frame_data;
+       deptsiz_data_t deptsiz;
+
+       if (ep->proc_buf_num == 0) {
+               /** Buffer 0 descriptors setup */
+               dma_ad = ep->dma_addr0;
+       } else {
+               /** Buffer 1 descriptors setup */
+               dma_ad = ep->dma_addr1;
+       }
+
+       if (ep->is_in) {
+               deptsiz.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->in_ep_regs[ep->num]->
+                                  dieptsiz);
+       } else {
+               deptsiz.d32 =
+                   DWC_READ_REG32(&core_if->dev_if->out_ep_regs[ep->num]->
+                                  doeptsiz);
+       }
+
+       if (!deptsiz.b.xfersize) {
+               offset = 0;
+               for (i = 0; i < ep->pkt_cnt; i += ep->pkt_per_frm) {
+                       frame_data = ep->data_per_frame;
+                       for (j = 0; j < ep->pkt_per_frm; ++j) {
+
+                               /* Packet status - is not set as initially
+                                * it is set to 0 and if packet was sent
+                                successfully, status field will remain 0*/
+
+                               /* Bytes has been transfered */
+                               packet_info->length =
+                                   (ep->maxpacket <
+                                    frame_data) ? ep->maxpacket : frame_data;
+
+                               /* Received packet offset */
+                               packet_info->offset = offset;
+                               offset += packet_info->length;
+                               frame_data -= packet_info->length;
+
+                               packet_info++;
+                       }
+               }
+               return 1;
+       } else {
+               /* This is a workaround for in case of Transfer Complete with
+                * PktDrpSts interrupts merging - in this case Transfer complete
+                * interrupt for Isoc Out Endpoint is asserted without PktDrpSts
+                * set and with DOEPTSIZ register non zero. Investigations showed,
+                * that this happens when Out packet is dropped, but because of
+                * interrupts merging during first interrupt handling PktDrpSts
+                * bit is cleared and for next merged interrupts it is not reset.
+                * In this case SW hadles the interrupt as if PktDrpSts bit is set.
+                */
+               if (ep->is_in) {
+                       return 1;
+               } else {
+                       return handle_iso_out_pkt_dropped(core_if, ep);
+               }
+       }
+}
+
+/**
+ * This function is to handle Iso EP transfer complete interrupt
+ *
+ * @param pcd The PCD
+ * @param ep The EP for which transfer complete was asserted
+ *
+ */
+static void complete_iso_ep(dwc_otg_pcd_t * pcd, dwc_otg_pcd_ep_t * ep)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(ep->pcd);
+       dwc_ep_t *dwc_ep = &ep->dwc_ep;
+       uint8_t is_last = 0;
+
+       if (ep->dwc_ep.next_frame == 0xffffffff) {
+               DWC_WARN("Next frame is not set!\n");
+               return;
+       }
+
+       if (core_if->dma_enable) {
+               if (core_if->dma_desc_enable) {
+                       set_ddma_iso_pkts_info(core_if, dwc_ep);
+                       reinit_ddma_iso_xfer(core_if, dwc_ep);
+                       is_last = 1;
+               } else {
+                       if (core_if->pti_enh_enable) {
+                               if (set_iso_pkts_info(core_if, dwc_ep)) {
+                                       dwc_ep->proc_buf_num =
+                                           (dwc_ep->proc_buf_num ^ 1) & 0x1;
+                                       dwc_otg_iso_ep_start_buf_transfer
+                                           (core_if, dwc_ep);
+                                       is_last = 1;
+                               }
+                       } else {
+                               set_current_pkt_info(core_if, dwc_ep);
+                               if (dwc_ep->cur_pkt >= dwc_ep->pkt_cnt) {
+                                       is_last = 1;
+                                       dwc_ep->cur_pkt = 0;
+                                       dwc_ep->proc_buf_num =
+                                           (dwc_ep->proc_buf_num ^ 1) & 0x1;
+                                       if (dwc_ep->proc_buf_num) {
+                                               dwc_ep->cur_pkt_addr =
+                                                   dwc_ep->xfer_buff1;
+                                               dwc_ep->cur_pkt_dma_addr =
+                                                   dwc_ep->dma_addr1;
+                                       } else {
+                                               dwc_ep->cur_pkt_addr =
+                                                   dwc_ep->xfer_buff0;
+                                               dwc_ep->cur_pkt_dma_addr =
+                                                   dwc_ep->dma_addr0;
+                                       }
+
+                               }
+                               dwc_otg_iso_ep_start_frm_transfer(core_if,
+                                                                 dwc_ep);
+                       }
+               }
+       } else {
+               set_current_pkt_info(core_if, dwc_ep);
+               if (dwc_ep->cur_pkt >= dwc_ep->pkt_cnt) {
+                       is_last = 1;
+                       dwc_ep->cur_pkt = 0;
+                       dwc_ep->proc_buf_num = (dwc_ep->proc_buf_num ^ 1) & 0x1;
+                       if (dwc_ep->proc_buf_num) {
+                               dwc_ep->cur_pkt_addr = dwc_ep->xfer_buff1;
+                               dwc_ep->cur_pkt_dma_addr = dwc_ep->dma_addr1;
+                       } else {
+                               dwc_ep->cur_pkt_addr = dwc_ep->xfer_buff0;
+                               dwc_ep->cur_pkt_dma_addr = dwc_ep->dma_addr0;
+                       }
+
+               }
+               dwc_otg_iso_ep_start_frm_transfer(core_if, dwc_ep);
+       }
+       if (is_last)
+               dwc_otg_iso_buffer_done(pcd, ep, ep->iso_req_handle);
+}
+#endif /* DWC_EN_ISOC */
+
+/**
+ * This function handle BNA interrupt for Non Isochronous EPs
+ *
+ */
+static void dwc_otg_pcd_handle_noniso_bna(dwc_otg_pcd_ep_t * ep)
+{
+       dwc_ep_t *dwc_ep = &ep->dwc_ep;
+       volatile uint32_t *addr;
+       depctl_data_t depctl = {.d32 = 0 };
+       dwc_otg_pcd_t *pcd = ep->pcd;
+       dwc_otg_dev_dma_desc_t *dma_desc;
+       dev_dma_desc_sts_t sts = {.d32 = 0 };
+       dwc_otg_core_if_t *core_if = ep->pcd->core_if;
+       int i, start;
+
+       if (!dwc_ep->desc_cnt)
+               DWC_WARN("Ep%d %s Descriptor count = %d \n", dwc_ep->num,
+                        (dwc_ep->is_in ? "IN" : "OUT"), dwc_ep->desc_cnt);
+
+       if (core_if->core_params->cont_on_bna && !dwc_ep->is_in
+                                                       && dwc_ep->type != DWC_OTG_EP_TYPE_CONTROL) {
+               uint32_t doepdma;
+               dwc_otg_dev_out_ep_regs_t *out_regs =
+                       core_if->dev_if->out_ep_regs[dwc_ep->num];
+               doepdma = DWC_READ_REG32(&(out_regs->doepdma));
+               start = (doepdma - dwc_ep->dma_desc_addr)/sizeof(dwc_otg_dev_dma_desc_t);
+               dma_desc = &(dwc_ep->desc_addr[start]);
+       } else {
+               start = 0;
+               dma_desc = dwc_ep->desc_addr;
+       }
+
+
+       for (i = start; i < dwc_ep->desc_cnt; ++i, ++dma_desc) {
+               sts.d32 = dma_desc->status.d32;
+               sts.b.bs = BS_HOST_READY;
+               dma_desc->status.d32 = sts.d32;
+       }
+
+       if (dwc_ep->is_in == 0) {
+               addr =
+                   &GET_CORE_IF(pcd)->dev_if->out_ep_regs[dwc_ep->num]->
+                   doepctl;
+       } else {
+               addr =
+                   &GET_CORE_IF(pcd)->dev_if->in_ep_regs[dwc_ep->num]->diepctl;
+       }
+       depctl.b.epena = 1;
+       depctl.b.cnak = 1;
+       DWC_MODIFY_REG32(addr, 0, depctl.d32);
+}
+
+/**
+ * This function handles EP0 Control transfers.
+ *
+ * The state of the control transfers are tracked in
+ * <code>ep0state</code>.
+ */
+static void handle_ep0(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_pcd_ep_t *ep0 = &pcd->ep0;
+       dev_dma_desc_sts_t desc_sts;
+       deptsiz0_data_t deptsiz;
+       uint32_t byte_count;
+
+#ifdef DEBUG_EP0
+       DWC_DEBUGPL(DBG_PCDV, "%s()\n", __func__);
+       print_ep0_state(pcd);
+#endif
+
+//      DWC_PRINTF("HANDLE EP0\n");
+
+       switch (pcd->ep0state) {
+       case EP0_DISCONNECT:
+               break;
+
+       case EP0_IDLE:
+               pcd->request_config = 0;
+
+               pcd_setup(pcd);
+               break;
+
+       case EP0_IN_DATA_PHASE:
+#ifdef DEBUG_EP0
+               DWC_DEBUGPL(DBG_PCD, "DATA_IN EP%d-%s: type=%d, mps=%d\n",
+                           ep0->dwc_ep.num, (ep0->dwc_ep.is_in ? "IN" : "OUT"),
+                           ep0->dwc_ep.type, ep0->dwc_ep.maxpacket);
+#endif
+
+               if (core_if->dma_enable != 0) {
+                       /*
+                        * For EP0 we can only program 1 packet at a time so we
+                        * need to do the make calculations after each complete.
+                        * Call write_packet to make the calculations, as in
+                        * slave mode, and use those values to determine if we
+                        * can complete.
+                        */
+                       if (core_if->dma_desc_enable == 0) {
+                               deptsiz.d32 =
+                                   DWC_READ_REG32(&core_if->
+                                                  dev_if->in_ep_regs[0]->
+                                                  dieptsiz);
+                               byte_count =
+                                   ep0->dwc_ep.xfer_len - deptsiz.b.xfersize;
+                       } else {
+                               desc_sts =
+                                   core_if->dev_if->in_desc_addr->status;
+                               byte_count =
+                                   ep0->dwc_ep.xfer_len - desc_sts.b.bytes;
+                       }
+                       ep0->dwc_ep.xfer_count += byte_count;
+                       ep0->dwc_ep.xfer_buff += byte_count;
+                       ep0->dwc_ep.dma_addr += byte_count;
+               }
+               if (ep0->dwc_ep.xfer_count < ep0->dwc_ep.total_len) {
+                       dwc_otg_ep0_continue_transfer(GET_CORE_IF(pcd),
+                                                     &ep0->dwc_ep);
+                       DWC_DEBUGPL(DBG_PCD, "CONTINUE TRANSFER\n");
+               } else if (ep0->dwc_ep.sent_zlp) {
+                       dwc_otg_ep0_continue_transfer(GET_CORE_IF(pcd),
+                                                     &ep0->dwc_ep);
+                       ep0->dwc_ep.sent_zlp = 0;
+                       DWC_DEBUGPL(DBG_PCD, "CONTINUE TRANSFER sent zlp\n");
+               } else {
+                       ep0_complete_request(ep0);
+                       DWC_DEBUGPL(DBG_PCD, "COMPLETE TRANSFER\n");
+               }
+               break;
+       case EP0_OUT_DATA_PHASE:
+#ifdef DEBUG_EP0
+               DWC_DEBUGPL(DBG_PCD, "DATA_OUT EP%d-%s: type=%d, mps=%d\n",
+                           ep0->dwc_ep.num, (ep0->dwc_ep.is_in ? "IN" : "OUT"),
+                           ep0->dwc_ep.type, ep0->dwc_ep.maxpacket);
+#endif
+               if (core_if->dma_enable != 0) {
+                       if (core_if->dma_desc_enable == 0) {
+                               deptsiz.d32 =
+                                   DWC_READ_REG32(&core_if->
+                                                  dev_if->out_ep_regs[0]->
+                                                  doeptsiz);
+                               byte_count =
+                                   ep0->dwc_ep.maxpacket - deptsiz.b.xfersize;
+                       } else {
+                               desc_sts =
+                                   core_if->dev_if->out_desc_addr->status;
+                               byte_count =
+                                   ep0->dwc_ep.maxpacket - desc_sts.b.bytes;
+                       }
+                       ep0->dwc_ep.xfer_count += byte_count;
+                       ep0->dwc_ep.xfer_buff += byte_count;
+                       ep0->dwc_ep.dma_addr += byte_count;
+               }
+               if (ep0->dwc_ep.xfer_count < ep0->dwc_ep.total_len) {
+                       dwc_otg_ep0_continue_transfer(GET_CORE_IF(pcd),
+                                                     &ep0->dwc_ep);
+                       DWC_DEBUGPL(DBG_PCD, "CONTINUE TRANSFER\n");
+               } else if (ep0->dwc_ep.sent_zlp) {
+                       dwc_otg_ep0_continue_transfer(GET_CORE_IF(pcd),
+                                                     &ep0->dwc_ep);
+                       ep0->dwc_ep.sent_zlp = 0;
+                       DWC_DEBUGPL(DBG_PCD, "CONTINUE TRANSFER sent zlp\n");
+               } else {
+                       ep0_complete_request(ep0);
+                       DWC_DEBUGPL(DBG_PCD, "COMPLETE TRANSFER\n");
+               }
+               break;
+
+       case EP0_IN_STATUS_PHASE:
+       case EP0_OUT_STATUS_PHASE:
+               DWC_DEBUGPL(DBG_PCD, "CASE: EP0_STATUS\n");
+               ep0_complete_request(ep0);
+               pcd->ep0state = EP0_IDLE;
+               ep0->stopped = 1;
+               ep0->dwc_ep.is_in = 0;  /* OUT for next SETUP */
+
+               /* Prepare for more SETUP Packets */
+               if (core_if->dma_enable) {
+                       ep0_out_start(core_if, pcd);
+               }
+               break;
+
+       case EP0_STALL:
+               DWC_ERROR("EP0 STALLed, should not get here pcd_setup()\n");
+               break;
+       }
+#ifdef DEBUG_EP0
+       print_ep0_state(pcd);
+#endif
+}
+
+/**
+ * Restart transfer
+ */
+static void restart_transfer(dwc_otg_pcd_t * pcd, const uint32_t epnum)
+{
+       dwc_otg_core_if_t *core_if;
+       dwc_otg_dev_if_t *dev_if;
+       deptsiz_data_t dieptsiz = {.d32 = 0 };
+       dwc_otg_pcd_ep_t *ep;
+
+       ep = get_in_ep(pcd, epnum);
+
+#ifdef DWC_EN_ISOC
+       if (ep->dwc_ep.type == DWC_OTG_EP_TYPE_ISOC) {
+               return;
+       }
+#endif /* DWC_EN_ISOC  */
+
+       core_if = GET_CORE_IF(pcd);
+       dev_if = core_if->dev_if;
+
+       dieptsiz.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->dieptsiz);
+
+       DWC_DEBUGPL(DBG_PCD, "xfer_buff=%p xfer_count=%0x xfer_len=%0x"
+                   " stopped=%d\n", ep->dwc_ep.xfer_buff,
+                   ep->dwc_ep.xfer_count, ep->dwc_ep.xfer_len, ep->stopped);
+       /*
+        * If xfersize is 0 and pktcnt in not 0, resend the last packet.
+        */
+       if (dieptsiz.b.pktcnt && dieptsiz.b.xfersize == 0 &&
+           ep->dwc_ep.start_xfer_buff != 0) {
+               if (ep->dwc_ep.total_len <= ep->dwc_ep.maxpacket) {
+                       ep->dwc_ep.xfer_count = 0;
+                       ep->dwc_ep.xfer_buff = ep->dwc_ep.start_xfer_buff;
+                       ep->dwc_ep.xfer_len = ep->dwc_ep.xfer_count;
+               } else {
+                       ep->dwc_ep.xfer_count -= ep->dwc_ep.maxpacket;
+                       /* convert packet size to dwords. */
+                       ep->dwc_ep.xfer_buff -= ep->dwc_ep.maxpacket;
+                       ep->dwc_ep.xfer_len = ep->dwc_ep.xfer_count;
+               }
+               ep->stopped = 0;
+               DWC_DEBUGPL(DBG_PCD, "xfer_buff=%p xfer_count=%0x "
+                           "xfer_len=%0x stopped=%d\n",
+                           ep->dwc_ep.xfer_buff,
+                           ep->dwc_ep.xfer_count, ep->dwc_ep.xfer_len,
+                           ep->stopped);
+               if (epnum == 0) {
+                       dwc_otg_ep0_start_transfer(core_if, &ep->dwc_ep);
+               } else {
+                       dwc_otg_ep_start_transfer(core_if, &ep->dwc_ep);
+               }
+       }
+}
+
+/*
+ * This function create new nextep sequnce based on Learn Queue.
+ *
+ * @param core_if Programming view of DWC_otg controller
+ */
+void predict_nextep_seq( dwc_otg_core_if_t * core_if)
+{
+       dwc_otg_device_global_regs_t *dev_global_regs =
+           core_if->dev_if->dev_global_regs;
+       const uint32_t TOKEN_Q_DEPTH = core_if->hwcfg2.b.dev_token_q_depth;
+       /* Number of Token Queue Registers */
+       const int DTKNQ_REG_CNT = (TOKEN_Q_DEPTH + 7) / 8;
+       dtknq1_data_t dtknqr1;
+       uint32_t in_tkn_epnums[4];
+       uint8_t seqnum[MAX_EPS_CHANNELS];
+       uint8_t intkn_seq[TOKEN_Q_DEPTH];
+       grstctl_t resetctl = {.d32 = 0 };
+       uint8_t temp;
+       int ndx = 0;
+       int start = 0;
+       int end = 0;
+       int sort_done = 0;
+       int i = 0;
+       volatile uint32_t *addr = &dev_global_regs->dtknqr1;
+
+
+       DWC_DEBUGPL(DBG_PCD,"dev_token_q_depth=%d\n",TOKEN_Q_DEPTH);
+
+       /* Read the DTKNQ Registers */
+       for (i = 0; i < DTKNQ_REG_CNT; i++) {
+               in_tkn_epnums[i] = DWC_READ_REG32(addr);
+               DWC_DEBUGPL(DBG_PCDV, "DTKNQR%d=0x%08x\n", i + 1,
+                           in_tkn_epnums[i]);
+               if (addr == &dev_global_regs->dvbusdis) {
+                       addr = &dev_global_regs->dtknqr3_dthrctl;
+               } else {
+                       ++addr;
+               }
+
+       }
+
+       /* Copy the DTKNQR1 data to the bit field. */
+       dtknqr1.d32 = in_tkn_epnums[0];
+       if (dtknqr1.b.wrap_bit) {
+               ndx = dtknqr1.b.intknwptr;
+               end = ndx -1;
+               if (end < 0)
+                       end = TOKEN_Q_DEPTH -1;
+       } else {
+               ndx = 0;
+               end = dtknqr1.b.intknwptr -1;
+               if (end < 0)
+                       end = 0;
+       }
+       start = ndx;
+
+       /* Fill seqnum[] by initial values: EP number + 31 */
+       for (i=0; i <= core_if->dev_if->num_in_eps; i++) {
+               seqnum[i] = i +31;
+       }
+
+       /* Fill intkn_seq[] from in_tkn_epnums[0] */
+       for (i=0; i < 6; i++)
+               intkn_seq[i] = (in_tkn_epnums[0] >> ((7-i) * 4)) & 0xf;
+
+       if (TOKEN_Q_DEPTH > 6) {
+               /* Fill intkn_seq[] from in_tkn_epnums[1] */
+               for (i=6; i < 14; i++)
+                       intkn_seq[i] =
+                           (in_tkn_epnums[1] >> ((7 - (i - 6)) * 4)) & 0xf;
+       }
+
+       if (TOKEN_Q_DEPTH > 14) {
+               /* Fill intkn_seq[] from in_tkn_epnums[1] */
+               for (i=14; i < 22; i++)
+                       intkn_seq[i] =
+                           (in_tkn_epnums[2] >> ((7 - (i - 14)) * 4)) & 0xf;
+       }
+
+       if (TOKEN_Q_DEPTH > 22) {
+               /* Fill intkn_seq[] from in_tkn_epnums[1] */
+               for (i=22; i < 30; i++)
+                       intkn_seq[i] =
+                           (in_tkn_epnums[3] >> ((7 - (i - 22)) * 4)) & 0xf;
+       }
+
+       DWC_DEBUGPL(DBG_PCDV, "%s start=%d end=%d intkn_seq[]:\n", __func__,
+                   start, end);
+       for (i=0; i<TOKEN_Q_DEPTH; i++)
+               DWC_DEBUGPL(DBG_PCDV,"%d\n", intkn_seq[i]);
+
+       /* Update seqnum based on intkn_seq[] */
+       i = 0;
+       do {
+               seqnum[intkn_seq[ndx]] = i;
+               ndx++;
+               i++;
+               if (ndx == TOKEN_Q_DEPTH)
+                       ndx = 0;
+       } while ( i < TOKEN_Q_DEPTH );
+
+       /* Mark non active EP's in seqnum[] by 0xff */
+       for (i=0; i<=core_if->dev_if->num_in_eps; i++) {
+               if (core_if->nextep_seq[i] == 0xff )
+                       seqnum[i] = 0xff;
+       }
+
+       /* Sort seqnum[] */
+       sort_done = 0;
+       while (!sort_done) {
+               sort_done = 1;
+               for (i=0; i<core_if->dev_if->num_in_eps; i++) {
+                       if (seqnum[i] > seqnum[i+1]) {
+                               temp = seqnum[i];
+                               seqnum[i] = seqnum[i+1];
+                               seqnum[i+1] = temp;
+                               sort_done = 0;
+                       }
+               }
+       }
+
+       ndx = start + seqnum[0];
+       if (ndx >= TOKEN_Q_DEPTH)
+               ndx = ndx % TOKEN_Q_DEPTH;
+       core_if->first_in_nextep_seq = intkn_seq[ndx];
+
+       /* Update seqnum[] by EP numbers  */
+       for (i=0; i<=core_if->dev_if->num_in_eps; i++) {
+               ndx = start + i;
+               if (seqnum[i] < 31) {
+                       ndx = start + seqnum[i];
+                       if (ndx >= TOKEN_Q_DEPTH)
+                               ndx = ndx % TOKEN_Q_DEPTH;
+                       seqnum[i] = intkn_seq[ndx];
+               } else {
+                       if (seqnum[i] < 0xff) {
+                               seqnum[i] = seqnum[i] - 31;
+                       } else {
+                               break;
+                       }
+               }
+       }
+
+       /* Update nextep_seq[] based on seqnum[] */
+       for (i=0; i<core_if->dev_if->num_in_eps; i++) {
+               if (seqnum[i] != 0xff) {
+                       if (seqnum[i+1] != 0xff) {
+                               core_if->nextep_seq[seqnum[i]] = seqnum[i+1];
+                       } else {
+                               core_if->nextep_seq[seqnum[i]] = core_if->first_in_nextep_seq;
+                               break;
+                       }
+               } else {
+                       break;
+               }
+       }
+
+       DWC_DEBUGPL(DBG_PCDV, "%s first_in_nextep_seq= %2d; nextep_seq[]:\n",
+               __func__, core_if->first_in_nextep_seq);
+       for (i=0; i <= core_if->dev_if->num_in_eps; i++) {
+               DWC_DEBUGPL(DBG_PCDV,"%2d\n", core_if->nextep_seq[i]);
+       }
+
+       /* Flush the Learning Queue */
+       resetctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->grstctl);
+       resetctl.b.intknqflsh = 1;
+       DWC_WRITE_REG32(&core_if->core_global_regs->grstctl, resetctl.d32);
+
+
+}
+
+/**
+ * handle the IN EP disable interrupt.
+ */
+static inline void handle_in_ep_disable_intr(dwc_otg_pcd_t * pcd,
+                                            const uint32_t epnum)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       deptsiz_data_t dieptsiz = {.d32 = 0 };
+       dctl_data_t dctl = {.d32 = 0 };
+       dwc_otg_pcd_ep_t *ep;
+       dwc_ep_t *dwc_ep;
+       gintmsk_data_t gintmsk_data;
+       depctl_data_t depctl;
+       uint32_t diepdma;
+       uint32_t remain_to_transfer = 0;
+       uint8_t i;
+       uint32_t xfer_size;
+
+       ep = get_in_ep(pcd, epnum);
+       dwc_ep = &ep->dwc_ep;
+
+       if (dwc_ep->type == DWC_OTG_EP_TYPE_ISOC) {
+               dwc_otg_flush_tx_fifo(core_if, dwc_ep->tx_fifo_num);
+               complete_ep(ep);
+               return;
+       }
+
+       DWC_DEBUGPL(DBG_PCD, "diepctl%d=%0x\n", epnum,
+                   DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->diepctl));
+       dieptsiz.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->dieptsiz);
+       depctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->diepctl);
+
+       DWC_DEBUGPL(DBG_ANY, "pktcnt=%d size=%d\n",
+                   dieptsiz.b.pktcnt, dieptsiz.b.xfersize);
+
+       if ((core_if->start_predict == 0) || (depctl.b.eptype & 1)) {
+               if (ep->stopped) {
+                       if (core_if->en_multiple_tx_fifo)
+                               /* Flush the Tx FIFO */
+                               dwc_otg_flush_tx_fifo(core_if, dwc_ep->tx_fifo_num);
+                       /* Clear the Global IN NP NAK */
+                       dctl.d32 = 0;
+                       dctl.b.cgnpinnak = 1;
+                       DWC_MODIFY_REG32(&dev_if->dev_global_regs->dctl, dctl.d32, dctl.d32);
+                       /* Restart the transaction */
+                       if (dieptsiz.b.pktcnt != 0 || dieptsiz.b.xfersize != 0) {
+                               restart_transfer(pcd, epnum);
+                       }
+               } else {
+                       /* Restart the transaction */
+                       if (dieptsiz.b.pktcnt != 0 || dieptsiz.b.xfersize != 0) {
+                               restart_transfer(pcd, epnum);
+                       }
+                       DWC_DEBUGPL(DBG_ANY, "STOPPED!!!\n");
+               }
+               return;
+       }
+
+       if (core_if->start_predict > 2) {       // NP IN EP
+               core_if->start_predict--;
+               return;
+       }
+
+       core_if->start_predict--;
+
+       if (core_if->start_predict == 1) {      // All NP IN Ep's disabled now
+
+               predict_nextep_seq(core_if);
+
+               /* Update all active IN EP's NextEP field based of nextep_seq[] */
+               for ( i = 0; i <= core_if->dev_if->num_in_eps; i++) {
+                       depctl.d32 =
+                           DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepctl);
+                       if (core_if->nextep_seq[i] != 0xff) {   // Active NP IN EP
+                               depctl.b.nextep = core_if->nextep_seq[i];
+                               DWC_WRITE_REG32(&dev_if->in_ep_regs[i]->diepctl, depctl.d32);
+                       }
+               }
+               /* Flush Shared NP TxFIFO */
+               dwc_otg_flush_tx_fifo(core_if, 0);
+               /* Rewind buffers */
+               if (!core_if->dma_desc_enable) {
+                       i = core_if->first_in_nextep_seq;
+                       do {
+                               ep = get_in_ep(pcd, i);
+                               dieptsiz.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[i]->dieptsiz);
+                               xfer_size = ep->dwc_ep.total_len - ep->dwc_ep.xfer_count;
+                               if (xfer_size > ep->dwc_ep.maxxfer)
+                                       xfer_size = ep->dwc_ep.maxxfer;
+                               depctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepctl);
+                               if (dieptsiz.b.pktcnt != 0) {
+                                       if (xfer_size == 0) {
+                                               remain_to_transfer = 0;
+                                       } else {
+                                               if ((xfer_size % ep->dwc_ep.maxpacket) == 0) {
+                                                       remain_to_transfer =
+                                                               dieptsiz.b.pktcnt * ep->dwc_ep.maxpacket;
+                                               } else {
+                                                       remain_to_transfer = ((dieptsiz.b.pktcnt -1) * ep->dwc_ep.maxpacket)
+                                                               + (xfer_size % ep->dwc_ep.maxpacket);
+                                               }
+                                       }
+                                       diepdma = DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepdma);
+                                       dieptsiz.b.xfersize = remain_to_transfer;
+                                       DWC_WRITE_REG32(&dev_if->in_ep_regs[i]->dieptsiz, dieptsiz.d32);
+                                       diepdma = ep->dwc_ep.dma_addr + (xfer_size - remain_to_transfer);
+                                       DWC_WRITE_REG32(&dev_if->in_ep_regs[i]->diepdma, diepdma);
+                               }
+                               i = core_if->nextep_seq[i];
+                       } while (i != core_if->first_in_nextep_seq);
+               } else { // dma_desc_enable
+                               DWC_PRINTF("%s Learning Queue not supported in DDMA\n", __func__);
+               }
+
+               /* Restart transfers in predicted sequences */
+               i = core_if->first_in_nextep_seq;
+               do {
+                       dieptsiz.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[i]->dieptsiz);
+                       depctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepctl);
+                       if (dieptsiz.b.pktcnt != 0) {
+                               depctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepctl);
+                               depctl.b.epena = 1;
+                               depctl.b.cnak = 1;
+                               DWC_WRITE_REG32(&dev_if->in_ep_regs[i]->diepctl, depctl.d32);
+                       }
+                       i = core_if->nextep_seq[i];
+               } while (i != core_if->first_in_nextep_seq);
+
+               /* Clear the global non-periodic IN NAK handshake */
+               dctl.d32 = 0;
+               dctl.b.cgnpinnak = 1;
+               DWC_MODIFY_REG32(&dev_if->dev_global_regs->dctl, dctl.d32, dctl.d32);
+
+               /* Unmask EP Mismatch interrupt */
+               gintmsk_data.d32 = 0;
+               gintmsk_data.b.epmismatch = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk, 0, gintmsk_data.d32);
+
+               core_if->start_predict = 0;
+
+       }
+}
+
+/**
+ * Handler for the IN EP timeout handshake interrupt.
+ */
+static inline void handle_in_ep_timeout_intr(dwc_otg_pcd_t * pcd,
+                                            const uint32_t epnum)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+
+#ifdef DEBUG
+       deptsiz_data_t dieptsiz = {.d32 = 0 };
+       uint32_t num = 0;
+#endif
+       dctl_data_t dctl = {.d32 = 0 };
+       dwc_otg_pcd_ep_t *ep;
+
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       ep = get_in_ep(pcd, epnum);
+
+       /* Disable the NP Tx Fifo Empty Interrrupt */
+       if (!core_if->dma_enable) {
+               intr_mask.b.nptxfempty = 1;
+               DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk,
+                                intr_mask.d32, 0);
+       }
+       /** @todo NGS Check EP type.
+        * Implement for Periodic EPs */
+       /*
+        * Non-periodic EP
+        */
+       /* Enable the Global IN NAK Effective Interrupt */
+       intr_mask.b.ginnakeff = 1;
+       DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk, 0, intr_mask.d32);
+
+       /* Set Global IN NAK */
+       dctl.b.sgnpinnak = 1;
+       DWC_MODIFY_REG32(&dev_if->dev_global_regs->dctl, dctl.d32, dctl.d32);
+
+       ep->stopped = 1;
+
+#ifdef DEBUG
+       dieptsiz.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[num]->dieptsiz);
+       DWC_DEBUGPL(DBG_ANY, "pktcnt=%d size=%d\n",
+                   dieptsiz.b.pktcnt, dieptsiz.b.xfersize);
+#endif
+
+#ifdef DISABLE_PERIODIC_EP
+       /*
+        * Set the NAK bit for this EP to
+        * start the disable process.
+        */
+       diepctl.d32 = 0;
+       diepctl.b.snak = 1;
+       DWC_MODIFY_REG32(&dev_if->in_ep_regs[num]->diepctl, diepctl.d32,
+                        diepctl.d32);
+       ep->disabling = 1;
+       ep->stopped = 1;
+#endif
+}
+
+/**
+ * Handler for the IN EP NAK interrupt.
+ */
+static inline int32_t handle_in_ep_nak_intr(dwc_otg_pcd_t * pcd,
+                                           const uint32_t epnum)
+{
+       /** @todo implement ISR */
+       dwc_otg_core_if_t *core_if;
+       diepmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_PRINTF("INTERRUPT Handler not implemented for %s\n", "IN EP NAK");
+       core_if = GET_CORE_IF(pcd);
+       intr_mask.b.nak = 1;
+
+       if (core_if->multiproc_int_enable) {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->
+                                diepeachintmsk[epnum], intr_mask.d32, 0);
+       } else {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->diepmsk,
+                                intr_mask.d32, 0);
+       }
+
+       return 1;
+}
+
+/**
+ * Handler for the OUT EP Babble interrupt.
+ */
+static inline int32_t handle_out_ep_babble_intr(dwc_otg_pcd_t * pcd,
+                                               const uint32_t epnum)
+{
+       /** @todo implement ISR */
+       dwc_otg_core_if_t *core_if;
+       doepmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_PRINTF("INTERRUPT Handler not implemented for %s\n",
+                  "OUT EP Babble");
+       core_if = GET_CORE_IF(pcd);
+       intr_mask.b.babble = 1;
+
+       if (core_if->multiproc_int_enable) {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->
+                                doepeachintmsk[epnum], intr_mask.d32, 0);
+       } else {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->doepmsk,
+                                intr_mask.d32, 0);
+       }
+
+       return 1;
+}
+
+/**
+ * Handler for the OUT EP NAK interrupt.
+ */
+static inline int32_t handle_out_ep_nak_intr(dwc_otg_pcd_t * pcd,
+                                            const uint32_t epnum)
+{
+       /** @todo implement ISR */
+       dwc_otg_core_if_t *core_if;
+       doepmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_DEBUGPL(DBG_ANY, "INTERRUPT Handler not implemented for %s\n", "OUT EP NAK");
+       core_if = GET_CORE_IF(pcd);
+       intr_mask.b.nak = 1;
+
+       if (core_if->multiproc_int_enable) {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->
+                                doepeachintmsk[epnum], intr_mask.d32, 0);
+       } else {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->doepmsk,
+                                intr_mask.d32, 0);
+       }
+
+       return 1;
+}
+
+/**
+ * Handler for the OUT EP NYET interrupt.
+ */
+static inline int32_t handle_out_ep_nyet_intr(dwc_otg_pcd_t * pcd,
+                                             const uint32_t epnum)
+{
+       /** @todo implement ISR */
+       dwc_otg_core_if_t *core_if;
+       doepmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_PRINTF("INTERRUPT Handler not implemented for %s\n", "OUT EP NYET");
+       core_if = GET_CORE_IF(pcd);
+       intr_mask.b.nyet = 1;
+
+       if (core_if->multiproc_int_enable) {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->
+                                doepeachintmsk[epnum], intr_mask.d32, 0);
+       } else {
+               DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->doepmsk,
+                                intr_mask.d32, 0);
+       }
+
+       return 1;
+}
+
+/**
+ * This interrupt indicates that an IN EP has a pending Interrupt.
+ * The sequence for handling the IN EP interrupt is shown below:
+ * -#  Read the Device All Endpoint Interrupt register
+ * -#  Repeat the following for each IN EP interrupt bit set (from
+ *             LSB to MSB).
+ * -#  Read the Device Endpoint Interrupt (DIEPINTn) register
+ * -#  If "Transfer Complete" call the request complete function
+ * -#  If "Endpoint Disabled" complete the EP disable procedure.
+ * -#  If "AHB Error Interrupt" log error
+ * -#  If "Time-out Handshake" log error
+ * -#  If "IN Token Received when TxFIFO Empty" write packet to Tx
+ *             FIFO.
+ * -#  If "IN Token EP Mismatch" (disable, this is handled by EP
+ *             Mismatch Interrupt)
+ */
+static int32_t dwc_otg_pcd_handle_in_ep_intr(dwc_otg_pcd_t * pcd)
+{
+#define CLEAR_IN_EP_INTR(__core_if,__epnum,__intr) \
+do { \
+               diepint_data_t diepint = {.d32=0}; \
+               diepint.b.__intr = 1; \
+               DWC_WRITE_REG32(&__core_if->dev_if->in_ep_regs[__epnum]->diepint, \
+               diepint.d32); \
+} while (0)
+
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       dwc_otg_dev_if_t *dev_if = core_if->dev_if;
+       diepint_data_t diepint = {.d32 = 0 };
+       depctl_data_t depctl = {.d32 = 0 };
+       uint32_t ep_intr;
+       uint32_t epnum = 0;
+       dwc_otg_pcd_ep_t *ep;
+       dwc_ep_t *dwc_ep;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, pcd);
+
+       /* Read in the device interrupt bits */
+       ep_intr = dwc_otg_read_dev_all_in_ep_intr(core_if);
+
+       /* Service the Device IN interrupts for each endpoint */
+       while (ep_intr) {
+               if (ep_intr & 0x1) {
+                       uint32_t empty_msk;
+                       /* Get EP pointer */
+                       ep = get_in_ep(pcd, epnum);
+                       dwc_ep = &ep->dwc_ep;
+
+                       depctl.d32 =
+                           DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->diepctl);
+                       empty_msk =
+                           DWC_READ_REG32(&dev_if->
+                                          dev_global_regs->dtknqr4_fifoemptymsk);
+
+                       DWC_DEBUGPL(DBG_PCDV,
+                                   "IN EP INTERRUPT - %d\nepmty_msk - %8x  diepctl - %8x\n",
+                                   epnum, empty_msk, depctl.d32);
+
+                       DWC_DEBUGPL(DBG_PCD,
+                                   "EP%d-%s: type=%d, mps=%d\n",
+                                   dwc_ep->num, (dwc_ep->is_in ? "IN" : "OUT"),
+                                   dwc_ep->type, dwc_ep->maxpacket);
+
+                       diepint.d32 =
+                           dwc_otg_read_dev_in_ep_intr(core_if, dwc_ep);
+
+                       DWC_DEBUGPL(DBG_PCDV,
+                                   "EP %d Interrupt Register - 0x%x\n", epnum,
+                                   diepint.d32);
+                       /* Transfer complete */
+                       if (diepint.b.xfercompl) {
+                               /* Disable the NP Tx FIFO Empty
+                                * Interrupt */
+                               if (core_if->en_multiple_tx_fifo == 0) {
+                                       intr_mask.b.nptxfempty = 1;
+                                       DWC_MODIFY_REG32
+                                           (&core_if->core_global_regs->gintmsk,
+                                            intr_mask.d32, 0);
+                               } else {
+                                       /* Disable the Tx FIFO Empty Interrupt for this EP */
+                                       uint32_t fifoemptymsk =
+                                           0x1 << dwc_ep->num;
+                                       DWC_MODIFY_REG32(&core_if->
+                                                        dev_if->dev_global_regs->dtknqr4_fifoemptymsk,
+                                                        fifoemptymsk, 0);
+                               }
+                               /* Clear the bit in DIEPINTn for this interrupt */
+                               CLEAR_IN_EP_INTR(core_if, epnum, xfercompl);
+
+                               /* Complete the transfer */
+                               if (epnum == 0) {
+                                       handle_ep0(pcd);
+                               }
+#ifdef DWC_EN_ISOC
+                               else if (dwc_ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                                       if (!ep->stopped)
+                                               complete_iso_ep(pcd, ep);
+                               }
+#endif /* DWC_EN_ISOC */
+#ifdef DWC_UTE_PER_IO
+                               else if (dwc_ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                                       if (!ep->stopped)
+                                               complete_xiso_ep(ep);
+                               }
+#endif /* DWC_UTE_PER_IO */
+                               else {
+                                       if (dwc_ep->type == DWC_OTG_EP_TYPE_ISOC &&
+                                                       dwc_ep->bInterval > 1) {
+                                               dwc_ep->frame_num += dwc_ep->bInterval;
+                                               if (dwc_ep->frame_num > 0x3FFF)
+                                               {
+                                                       dwc_ep->frm_overrun = 1;
+                                                       dwc_ep->frame_num &= 0x3FFF;
+                                               } else
+                                                       dwc_ep->frm_overrun = 0;
+                                       }
+                                       complete_ep(ep);
+                                       if(diepint.b.nak)
+                                               CLEAR_IN_EP_INTR(core_if, epnum, nak);
+                               }
+                       }
+                       /* Endpoint disable      */
+                       if (diepint.b.epdisabled) {
+                               DWC_DEBUGPL(DBG_ANY, "EP%d IN disabled\n",
+                                           epnum);
+                               handle_in_ep_disable_intr(pcd, epnum);
+
+                               /* Clear the bit in DIEPINTn for this interrupt */
+                               CLEAR_IN_EP_INTR(core_if, epnum, epdisabled);
+                       }
+                       /* AHB Error */
+                       if (diepint.b.ahberr) {
+                               DWC_ERROR("EP%d IN AHB Error\n", epnum);
+                               /* Clear the bit in DIEPINTn for this interrupt */
+                               CLEAR_IN_EP_INTR(core_if, epnum, ahberr);
+                       }
+                       /* TimeOUT Handshake (non-ISOC IN EPs) */
+                       if (diepint.b.timeout) {
+                               DWC_ERROR("EP%d IN Time-out\n", epnum);
+                               handle_in_ep_timeout_intr(pcd, epnum);
+
+                               CLEAR_IN_EP_INTR(core_if, epnum, timeout);
+                       }
+                       /** IN Token received with TxF Empty */
+                       if (diepint.b.intktxfemp) {
+                               DWC_DEBUGPL(DBG_ANY,
+                                           "EP%d IN TKN TxFifo Empty\n",
+                                           epnum);
+                               if (!ep->stopped && epnum != 0) {
+
+                                       diepmsk_data_t diepmsk = {.d32 = 0 };
+                                       diepmsk.b.intktxfemp = 1;
+
+                                       if (core_if->multiproc_int_enable) {
+                                               DWC_MODIFY_REG32
+                                                   (&dev_if->dev_global_regs->diepeachintmsk
+                                                    [epnum], diepmsk.d32, 0);
+                                       } else {
+                                               DWC_MODIFY_REG32
+                                                   (&dev_if->dev_global_regs->diepmsk,
+                                                    diepmsk.d32, 0);
+                                       }
+                               } else if (core_if->dma_desc_enable
+                                          && epnum == 0
+                                          && pcd->ep0state ==
+                                          EP0_OUT_STATUS_PHASE) {
+                                       // EP0 IN set STALL
+                                       depctl.d32 =
+                                           DWC_READ_REG32(&dev_if->in_ep_regs
+                                                          [epnum]->diepctl);
+
+                                       /* set the disable and stall bits */
+                                       if (depctl.b.epena) {
+                                               depctl.b.epdis = 1;
+                                       }
+                                       depctl.b.stall = 1;
+                                       DWC_WRITE_REG32(&dev_if->in_ep_regs
+                                                       [epnum]->diepctl,
+                                                       depctl.d32);
+                               }
+                               CLEAR_IN_EP_INTR(core_if, epnum, intktxfemp);
+                       }
+                       /** IN Token Received with EP mismatch */
+                       if (diepint.b.intknepmis) {
+                               DWC_DEBUGPL(DBG_ANY,
+                                           "EP%d IN TKN EP Mismatch\n", epnum);
+                               CLEAR_IN_EP_INTR(core_if, epnum, intknepmis);
+                       }
+                       /** IN Endpoint NAK Effective */
+                       if (diepint.b.inepnakeff) {
+                               DWC_DEBUGPL(DBG_ANY,
+                                           "EP%d IN EP NAK Effective\n",
+                                           epnum);
+                               /* Periodic EP */
+                               if (ep->disabling) {
+                                       depctl.d32 = 0;
+                                       depctl.b.snak = 1;
+                                       depctl.b.epdis = 1;
+                                       DWC_MODIFY_REG32(&dev_if->in_ep_regs
+                                                        [epnum]->diepctl,
+                                                        depctl.d32,
+                                                        depctl.d32);
+                               }
+                               CLEAR_IN_EP_INTR(core_if, epnum, inepnakeff);
+
+                       }
+
+                       /** IN EP Tx FIFO Empty Intr */
+                       if (diepint.b.emptyintr) {
+                               DWC_DEBUGPL(DBG_ANY,
+                                           "EP%d Tx FIFO Empty Intr \n",
+                                           epnum);
+                               write_empty_tx_fifo(pcd, epnum);
+
+                               CLEAR_IN_EP_INTR(core_if, epnum, emptyintr);
+
+                       }
+
+                       /** IN EP BNA Intr */
+                       if (diepint.b.bna) {
+                               CLEAR_IN_EP_INTR(core_if, epnum, bna);
+                               if (core_if->dma_desc_enable) {
+#ifdef DWC_EN_ISOC
+                                       if (dwc_ep->type ==
+                                           DWC_OTG_EP_TYPE_ISOC) {
+                                               /*
+                                                * This checking is performed to prevent first "false" BNA
+                                                * handling occuring right after reconnect
+                                                */
+                                               if (dwc_ep->next_frame !=
+                                                   0xffffffff)
+                                                       dwc_otg_pcd_handle_iso_bna(ep);
+                                       } else
+#endif                         /* DWC_EN_ISOC */
+                                       {
+                                               dwc_otg_pcd_handle_noniso_bna(ep);
+                                       }
+                               }
+                       }
+                       /* NAK Interrutp */
+                       if (diepint.b.nak) {
+                               DWC_DEBUGPL(DBG_ANY, "EP%d IN NAK Interrupt\n",
+                                           epnum);
+                               if (ep->dwc_ep.type == DWC_OTG_EP_TYPE_ISOC) {
+                                       depctl_data_t depctl;
+                                       if (ep->dwc_ep.frame_num == 0xFFFFFFFF) {
+                                               ep->dwc_ep.frame_num = core_if->frame_num;
+                                               if (ep->dwc_ep.bInterval > 1) {
+                                                       depctl.d32 = 0;
+                                                       depctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[epnum]->diepctl);
+                                                       if (ep->dwc_ep.frame_num & 0x1) {
+                                                               depctl.b.setd1pid = 1;
+                                                               depctl.b.setd0pid = 0;
+                                                       } else {
+                                                               depctl.b.setd0pid = 1;
+                                                               depctl.b.setd1pid = 0;
+                                                       }
+                                                       DWC_WRITE_REG32(&dev_if->in_ep_regs[epnum]->diepctl, depctl.d32);
+                                               }
+                                               start_next_request(ep);
+                                       }
+                                       ep->dwc_ep.frame_num += ep->dwc_ep.bInterval;
+                                       if (dwc_ep->frame_num > 0x3FFF) {
+                                               dwc_ep->frm_overrun = 1;
+                                               dwc_ep->frame_num &= 0x3FFF;
+                                       } else
+                                               dwc_ep->frm_overrun = 0;
+                               }
+
+                               CLEAR_IN_EP_INTR(core_if, epnum, nak);
+                       }
+               }
+               epnum++;
+               ep_intr >>= 1;
+       }
+
+       return 1;
+#undef CLEAR_IN_EP_INTR
+}
+
+/**
+ * This interrupt indicates that an OUT EP has a pending Interrupt.
+ * The sequence for handling the OUT EP interrupt is shown below:
+ * -#  Read the Device All Endpoint Interrupt register
+ * -#  Repeat the following for each OUT EP interrupt bit set (from
+ *             LSB to MSB).
+ * -#  Read the Device Endpoint Interrupt (DOEPINTn) register
+ * -#  If "Transfer Complete" call the request complete function
+ * -#  If "Endpoint Disabled" complete the EP disable procedure.
+ * -#  If "AHB Error Interrupt" log error
+ * -#  If "Setup Phase Done" process Setup Packet (See Standard USB
+ *             Command Processing)
+ */
+static int32_t dwc_otg_pcd_handle_out_ep_intr(dwc_otg_pcd_t * pcd)
+{
+#define CLEAR_OUT_EP_INTR(__core_if,__epnum,__intr) \
+do { \
+               doepint_data_t doepint = {.d32=0}; \
+               doepint.b.__intr = 1; \
+               DWC_WRITE_REG32(&__core_if->dev_if->out_ep_regs[__epnum]->doepint, \
+               doepint.d32); \
+} while (0)
+
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       uint32_t ep_intr;
+       doepint_data_t doepint = {.d32 = 0 };
+       uint32_t epnum = 0;
+       dwc_otg_pcd_ep_t *ep;
+       dwc_ep_t *dwc_ep;
+       dctl_data_t dctl = {.d32 = 0 };
+       gintmsk_data_t gintmsk = {.d32 = 0 };
+
+
+       DWC_DEBUGPL(DBG_PCDV, "%s()\n", __func__);
+
+       /* Read in the device interrupt bits */
+       ep_intr = dwc_otg_read_dev_all_out_ep_intr(core_if);
+
+       while (ep_intr) {
+               if (ep_intr & 0x1) {
+                       /* Get EP pointer */
+                       ep = get_out_ep(pcd, epnum);
+                       dwc_ep = &ep->dwc_ep;
+
+#ifdef VERBOSE
+                       DWC_DEBUGPL(DBG_PCDV,
+                                   "EP%d-%s: type=%d, mps=%d\n",
+                                   dwc_ep->num, (dwc_ep->is_in ? "IN" : "OUT"),
+                                   dwc_ep->type, dwc_ep->maxpacket);
+#endif
+                       doepint.d32 =
+                           dwc_otg_read_dev_out_ep_intr(core_if, dwc_ep);
+                       /* Moved this interrupt upper due to core deffect of asserting
+                        * OUT EP 0 xfercompl along with stsphsrcvd in BDMA */
+                       if (doepint.b.stsphsercvd) {
+                               deptsiz0_data_t deptsiz;
+                               CLEAR_OUT_EP_INTR(core_if, epnum, stsphsercvd);
+                               deptsiz.d32 =
+                                   DWC_READ_REG32(&core_if->dev_if->
+                                                  out_ep_regs[0]->doeptsiz);
+                               if (core_if->snpsid >= OTG_CORE_REV_3_00a
+                                   && core_if->dma_enable
+                                   && core_if->dma_desc_enable == 0
+                                   && doepint.b.xfercompl
+                                   && deptsiz.b.xfersize == 24) {
+                                       CLEAR_OUT_EP_INTR(core_if, epnum,
+                                                         xfercompl);
+                                       doepint.b.xfercompl = 0;
+                                       ep0_out_start(core_if, pcd);
+                               }
+                               if ((core_if->dma_desc_enable) ||
+                                   (core_if->dma_enable
+                                    && core_if->snpsid >=
+                                    OTG_CORE_REV_3_00a)) {
+                                       do_setup_in_status_phase(pcd);
+                               }
+                       }
+                       /* Transfer complete */
+                       if (doepint.b.xfercompl) {
+
+                               if (epnum == 0) {
+                                       /* Clear the bit in DOEPINTn for this interrupt */
+                                       CLEAR_OUT_EP_INTR(core_if, epnum, xfercompl);
+                                       if (core_if->snpsid >= OTG_CORE_REV_3_00a) {
+                                               DWC_DEBUGPL(DBG_PCDV, "DOEPINT=%x doepint=%x\n",
+                                                       DWC_READ_REG32(&core_if->dev_if->out_ep_regs[0]->doepint),
+                                                       doepint.d32);
+                                               DWC_DEBUGPL(DBG_PCDV, "DOEPCTL=%x \n",
+                                                       DWC_READ_REG32(&core_if->dev_if->out_ep_regs[0]->doepctl));
+
+                                               if (core_if->snpsid >= OTG_CORE_REV_3_00a
+                                                       && core_if->dma_enable == 0) {
+                                                       doepint_data_t doepint;
+                                                       doepint.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                               out_ep_regs[0]->doepint);
+                                                       if (pcd->ep0state == EP0_IDLE && doepint.b.sr) {
+                                                               CLEAR_OUT_EP_INTR(core_if, epnum, sr);
+                                                               goto exit_xfercompl;
+                                                       }
+                                               }
+                                               /* In case of DDMA  look at SR bit to go to the Data Stage */
+                                               if (core_if->dma_desc_enable) {
+                                                       dev_dma_desc_sts_t status = {.d32 = 0};
+                                                       if (pcd->ep0state == EP0_IDLE) {
+                                                               status.d32 = core_if->dev_if->setup_desc_addr[core_if->
+                                                                                       dev_if->setup_desc_index]->status.d32;
+                                                               if(pcd->data_terminated) {
+                                                                        pcd->data_terminated = 0;
+                                                                        status.d32 = core_if->dev_if->out_desc_addr->status.d32;
+                                                                        dwc_memcpy(&pcd->setup_pkt->req, pcd->backup_buf, 8);
+                                                               }
+                                                               if (status.b.sr) {
+                                                                       if (doepint.b.setup) {
+                                                                               DWC_DEBUGPL(DBG_PCDV, "DMA DESC EP0_IDLE SR=1 setup=1\n");
+                                                                               /* Already started data stage, clear setup */
+                                                                               CLEAR_OUT_EP_INTR(core_if, epnum, setup);
+                                                                               doepint.b.setup = 0;
+                                                                               handle_ep0(pcd);
+                                                                               /* Prepare for more setup packets */
+                                                                               if (pcd->ep0state == EP0_IN_STATUS_PHASE ||
+                                                                                       pcd->ep0state == EP0_IN_DATA_PHASE) {
+                                                                                       ep0_out_start(core_if, pcd);
+                                                                               }
+
+                                                                               goto exit_xfercompl;
+                                                                       } else {
+                                                                               /* Prepare for more setup packets */
+                                                                               DWC_DEBUGPL(DBG_PCDV,
+                                                                                       "EP0_IDLE SR=1 setup=0 new setup comes\n");
+                                                                               ep0_out_start(core_if, pcd);
+                                                                       }
+                                                               }
+                                                       } else {
+                                                               dwc_otg_pcd_request_t *req;
+                                                               dev_dma_desc_sts_t status = {.d32 = 0};
+                                                               diepint_data_t diepint0;
+                                                               diepint0.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                                       in_ep_regs[0]->diepint);
+
+                                                               if (pcd->ep0state == EP0_STALL || pcd->ep0state == EP0_DISCONNECT) {
+                                                                       DWC_ERROR("EP0 is stalled/disconnected\n");
+                                                               }
+
+                                                               /* Clear IN xfercompl if set */
+                                                               if (diepint0.b.xfercompl && (pcd->ep0state == EP0_IN_STATUS_PHASE
+                                                                       || pcd->ep0state == EP0_IN_DATA_PHASE)) {
+                                                                       DWC_WRITE_REG32(&core_if->dev_if->
+                                                                               in_ep_regs[0]->diepint, diepint0.d32);
+                                                               }
+
+                                                               status.d32 = core_if->dev_if->setup_desc_addr[core_if->
+                                                                       dev_if->setup_desc_index]->status.d32;
+
+                                                               if (ep->dwc_ep.xfer_count != ep->dwc_ep.total_len
+                                                                       && (pcd->ep0state == EP0_OUT_DATA_PHASE))
+                                                                       status.d32 = core_if->dev_if->out_desc_addr->status.d32;
+                                                               if (pcd->ep0state == EP0_OUT_STATUS_PHASE)
+                                                                       status.d32 = core_if->dev_if->
+                                                                       out_desc_addr->status.d32;
+
+                                                               if (status.b.sr) {
+                                                                       if (DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+                                                                               DWC_DEBUGPL(DBG_PCDV, "Request queue empty!!\n");
+                                                                       } else {
+                                                                               DWC_DEBUGPL(DBG_PCDV, "complete req!!\n");
+                                                                               req = DWC_CIRCLEQ_FIRST(&ep->queue);
+                                                                               if (ep->dwc_ep.xfer_count != ep->dwc_ep.total_len &&
+                                                                                       pcd->ep0state == EP0_OUT_DATA_PHASE) {
+                                                                                               /* Read arrived setup packet from req->buf */
+                                                                                               dwc_memcpy(&pcd->setup_pkt->req,
+                                                                                                       req->buf + ep->dwc_ep.xfer_count, 8);
+                                                                               }
+                                                                               req->actual = ep->dwc_ep.xfer_count;
+                                                                               dwc_otg_request_done(ep, req, -ECONNRESET);
+                                                                               ep->dwc_ep.start_xfer_buff = 0;
+                                                                               ep->dwc_ep.xfer_buff = 0;
+                                                                               ep->dwc_ep.xfer_len = 0;
+                                                                       }
+                                                                       pcd->ep0state = EP0_IDLE;
+                                                                       if (doepint.b.setup) {
+                                                                               DWC_DEBUGPL(DBG_PCDV, "EP0_IDLE SR=1 setup=1\n");
+                                                                               /* Data stage started, clear setup */
+                                                                               CLEAR_OUT_EP_INTR(core_if, epnum, setup);
+                                                                               doepint.b.setup = 0;
+                                                                               handle_ep0(pcd);
+                                                                               /* Prepare for setup packets if ep0in was enabled*/
+                                                                               if (pcd->ep0state == EP0_IN_STATUS_PHASE) {
+                                                                                       ep0_out_start(core_if, pcd);
+                                                                               }
+
+                                                                               goto exit_xfercompl;
+                                                                       } else {
+                                                                               /* Prepare for more setup packets */
+                                                                               DWC_DEBUGPL(DBG_PCDV,
+                                                                                       "EP0_IDLE SR=1 setup=0 new setup comes 2\n");
+                                                                               ep0_out_start(core_if, pcd);
+                                                                       }
+                                                               }
+                                                       }
+                                               }
+                                               if (core_if->snpsid >= OTG_CORE_REV_2_94a && core_if->dma_enable
+                                                       && core_if->dma_desc_enable == 0) {
+                                                       doepint_data_t doepint_temp = {.d32 = 0};
+                                                       deptsiz0_data_t doeptsize0 = {.d32 = 0 };
+                                                       doepint_temp.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                                       out_ep_regs[ep->dwc_ep.num]->doepint);
+                                                       doeptsize0.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                                       out_ep_regs[ep->dwc_ep.num]->doeptsiz);
+                                                       if (pcd->ep0state == EP0_IDLE) {
+                                                               if (doepint_temp.b.sr) {
+                                                                       CLEAR_OUT_EP_INTR(core_if, epnum, sr);
+                                                               }
+                                                                       doepint.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                                                       out_ep_regs[0]->doepint);
+                                                                       if (doeptsize0.b.supcnt == 3) {
+                                                                               DWC_DEBUGPL(DBG_ANY, "Rolling over!!!!!!!\n");
+                                                                               ep->dwc_ep.stp_rollover = 1;
+                                                                       }
+                                                                       if (doepint.b.setup) {
+retry:
+                                                                               /* Already started data stage, clear setup */
+                                                                               CLEAR_OUT_EP_INTR(core_if, epnum, setup);
+                                                                               doepint.b.setup = 0;
+                                                                               handle_ep0(pcd);
+                                                                               ep->dwc_ep.stp_rollover = 0;
+                                                                               /* Prepare for more setup packets */
+                                                                               if (pcd->ep0state == EP0_IN_STATUS_PHASE ||
+                                                                                       pcd->ep0state == EP0_IN_DATA_PHASE) {
+                                                                                       ep0_out_start(core_if, pcd);
+                                                                               }
+                                                                               goto exit_xfercompl;
+                                                                       } else {
+                                                                               /* Prepare for more setup packets */
+                                                                               DWC_DEBUGPL(DBG_ANY,
+                                                                                       "EP0_IDLE SR=1 setup=0 new setup comes\n");
+                                                                               doepint.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                                                       out_ep_regs[0]->doepint);
+                                                                               if(doepint.b.setup)
+                                                                                       goto retry;
+                                                                               ep0_out_start(core_if, pcd);
+                                                                       }
+                                                       } else {
+                                                               dwc_otg_pcd_request_t *req;
+                                                               diepint_data_t diepint0 = {.d32 = 0};
+                                                               doepint_data_t doepint_temp = {.d32 = 0};
+                                                               depctl_data_t diepctl0;
+                                                               diepint0.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                                               in_ep_regs[0]->diepint);
+                                                               diepctl0.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                                               in_ep_regs[0]->diepctl);
+
+                                                               if (pcd->ep0state == EP0_IN_DATA_PHASE
+                                                                       || pcd->ep0state == EP0_IN_STATUS_PHASE) {
+                                                                       if (diepint0.b.xfercompl) {
+                                                                               DWC_WRITE_REG32(&core_if->dev_if->
+                                                                                       in_ep_regs[0]->diepint, diepint0.d32);
+                                                                       }
+                                                                       if (diepctl0.b.epena) {
+                                                                               diepint_data_t diepint = {.d32 = 0};
+                                                                               diepctl0.b.snak = 1;
+                                                                               DWC_WRITE_REG32(&core_if->dev_if->
+                                                                                                               in_ep_regs[0]->diepctl, diepctl0.d32);
+                                                                               do {
+                                                                                       dwc_udelay(10);
+                                                                                       diepint.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                               in_ep_regs[0]->diepint);
+                                                                               } while (!diepint.b.inepnakeff);
+                                                                               diepint.b.inepnakeff = 1;
+                                                                               DWC_WRITE_REG32(&core_if->dev_if->
+                                                                                       in_ep_regs[0]->diepint, diepint.d32);
+                                                                               diepctl0.d32 = 0;
+                                                                               diepctl0.b.epdis = 1;
+                                                                               DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[0]->diepctl,
+                                                                                                               diepctl0.d32);
+                                                                               do {
+                                                                                       dwc_udelay(10);
+                                                                                       diepint.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                               in_ep_regs[0]->diepint);
+                                                                               } while (!diepint.b.epdisabled);
+                                                                               diepint.b.epdisabled = 1;
+                                                                               DWC_WRITE_REG32(&core_if->dev_if->in_ep_regs[0]->diepint,
+                                                                                                                       diepint.d32);
+                                                                       }
+                                                               }
+                                                               doepint_temp.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                                               out_ep_regs[ep->dwc_ep.num]->doepint);
+                                                               if (doepint_temp.b.sr) {
+                                                                       CLEAR_OUT_EP_INTR(core_if, epnum, sr);
+                                                                       if (DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+                                                                               DWC_DEBUGPL(DBG_PCDV, "Request queue empty!!\n");
+                                                                       } else {
+                                                                               DWC_DEBUGPL(DBG_PCDV, "complete req!!\n");
+                                                                               req = DWC_CIRCLEQ_FIRST(&ep->queue);
+                                                                               if (ep->dwc_ep.xfer_count != ep->dwc_ep.total_len &&
+                                                                                       pcd->ep0state == EP0_OUT_DATA_PHASE) {
+                                                                                               /* Read arrived setup packet from req->buf */
+                                                                                               dwc_memcpy(&pcd->setup_pkt->req,
+                                                                                                       req->buf + ep->dwc_ep.xfer_count, 8);
+                                                                               }
+                                                                               req->actual = ep->dwc_ep.xfer_count;
+                                                                               dwc_otg_request_done(ep, req, -ECONNRESET);
+                                                                               ep->dwc_ep.start_xfer_buff = 0;
+                                                                               ep->dwc_ep.xfer_buff = 0;
+                                                                               ep->dwc_ep.xfer_len = 0;
+                                                                       }
+                                                                       pcd->ep0state = EP0_IDLE;
+                                                                       if (doepint.b.setup) {
+                                                                               DWC_DEBUGPL(DBG_PCDV, "EP0_IDLE SR=1 setup=1\n");
+                                                                               /* Data stage started, clear setup */
+                                                                               CLEAR_OUT_EP_INTR(core_if, epnum, setup);
+                                                                               doepint.b.setup = 0;
+                                                                               handle_ep0(pcd);
+                                                                               /* Prepare for setup packets if ep0in was enabled*/
+                                                                               if (pcd->ep0state == EP0_IN_STATUS_PHASE) {
+                                                                                       ep0_out_start(core_if, pcd);
+                                                                               }
+                                                                               goto exit_xfercompl;
+                                                                       } else {
+                                                                               /* Prepare for more setup packets */
+                                                                               DWC_DEBUGPL(DBG_PCDV,
+                                                                                       "EP0_IDLE SR=1 setup=0 new setup comes 2\n");
+                                                                               ep0_out_start(core_if, pcd);
+                                                                       }
+                                                               }
+                                                       }
+                                               }
+                                               if (core_if->dma_enable == 0 || pcd->ep0state != EP0_IDLE)
+                                                       handle_ep0(pcd);
+exit_xfercompl:
+                                               DWC_DEBUGPL(DBG_PCDV, "DOEPINT=%x doepint=%x\n",
+                                                       dwc_otg_read_dev_out_ep_intr(core_if, dwc_ep), doepint.d32);
+                                       } else {
+                                       if (core_if->dma_desc_enable == 0
+                                           || pcd->ep0state != EP0_IDLE)
+                                               handle_ep0(pcd);
+                                       }
+#ifdef DWC_EN_ISOC
+                               } else if (dwc_ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                                       if (doepint.b.pktdrpsts == 0) {
+                                               /* Clear the bit in DOEPINTn for this interrupt */
+                                               CLEAR_OUT_EP_INTR(core_if,
+                                                                 epnum,
+                                                                 xfercompl);
+                                               complete_iso_ep(pcd, ep);
+                                       } else {
+
+                                               doepint_data_t doepint = {.d32 = 0 };
+                                               doepint.b.xfercompl = 1;
+                                               doepint.b.pktdrpsts = 1;
+                                               DWC_WRITE_REG32
+                                                   (&core_if->dev_if->out_ep_regs
+                                                    [epnum]->doepint,
+                                                    doepint.d32);
+                                               if (handle_iso_out_pkt_dropped
+                                                   (core_if, dwc_ep)) {
+                                                       complete_iso_ep(pcd,
+                                                                       ep);
+                                               }
+                                       }
+#endif /* DWC_EN_ISOC */
+#ifdef DWC_UTE_PER_IO
+                               } else if (dwc_ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                                       CLEAR_OUT_EP_INTR(core_if, epnum, xfercompl);
+                                       if (!ep->stopped)
+                                               complete_xiso_ep(ep);
+#endif /* DWC_UTE_PER_IO */
+                               } else {
+                                       /* Clear the bit in DOEPINTn for this interrupt */
+                                       CLEAR_OUT_EP_INTR(core_if, epnum,
+                                                         xfercompl);
+
+                                       if (core_if->core_params->dev_out_nak) {
+                                               DWC_TIMER_CANCEL(pcd->core_if->ep_xfer_timer[epnum]);
+                                               pcd->core_if->ep_xfer_info[epnum].state = 0;
+#ifdef DEBUG
+                                               print_memory_payload(pcd, dwc_ep);
+#endif
+                                       }
+                                       complete_ep(ep);
+                               }
+
+                       }
+
+                       /* Endpoint disable      */
+                       if (doepint.b.epdisabled) {
+
+                               /* Clear the bit in DOEPINTn for this interrupt */
+                               CLEAR_OUT_EP_INTR(core_if, epnum, epdisabled);
+                               if (core_if->core_params->dev_out_nak) {
+#ifdef DEBUG
+                                       print_memory_payload(pcd, dwc_ep);
+#endif
+                                       /* In case of timeout condition */
+                                       if (core_if->ep_xfer_info[epnum].state == 2) {
+                                               dctl.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                               dev_global_regs->dctl);
+                                               dctl.b.cgoutnak = 1;
+                                               DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dctl,
+                                                                                                                               dctl.d32);
+                                               /* Unmask goutnakeff interrupt which was masked
+                                                * during handle nak out interrupt */
+                                               gintmsk.b.goutnakeff = 1;
+                                               DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk,
+                                                                                                                               0, gintmsk.d32);
+
+                                               complete_ep(ep);
+                                       }
+                               }
+                               if (ep->dwc_ep.type == DWC_OTG_EP_TYPE_ISOC)
+                               {
+                                       dctl_data_t dctl;
+                                       gintmsk_data_t intr_mask = {.d32 = 0};
+                                       dwc_otg_pcd_request_t *req = 0;
+
+                                       dctl.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                               dev_global_regs->dctl);
+                                       dctl.b.cgoutnak = 1;
+                                       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dctl,
+                                               dctl.d32);
+
+                                       intr_mask.d32 = 0;
+                                       intr_mask.b.incomplisoout = 1;
+
+                                       /* Get any pending requests */
+                                       if (!DWC_CIRCLEQ_EMPTY(&ep->queue)) {
+                                               req = DWC_CIRCLEQ_FIRST(&ep->queue);
+                                               if (!req) {
+                                                       DWC_PRINTF("complete_ep 0x%p, req = NULL!\n", ep);
+                                               } else {
+                                                       dwc_otg_request_done(ep, req, 0);
+                                                       start_next_request(ep);
+                                               }
+                                       } else {
+                                               DWC_PRINTF("complete_ep 0x%p, ep->queue empty!\n", ep);
+                                       }
+                               }
+                       }
+                       /* AHB Error */
+                       if (doepint.b.ahberr) {
+                               DWC_ERROR("EP%d OUT AHB Error\n", epnum);
+                               DWC_ERROR("EP%d DEPDMA=0x%08x \n",
+                                         epnum, core_if->dev_if->out_ep_regs[epnum]->doepdma);
+                               CLEAR_OUT_EP_INTR(core_if, epnum, ahberr);
+                       }
+                       /* Setup Phase Done (contorl EPs) */
+                       if (doepint.b.setup) {
+#ifdef DEBUG_EP0
+                               DWC_DEBUGPL(DBG_PCD, "EP%d SETUP Done\n", epnum);
+#endif
+                               CLEAR_OUT_EP_INTR(core_if, epnum, setup);
+
+                               handle_ep0(pcd);
+                       }
+
+                       /** OUT EP BNA Intr */
+                       if (doepint.b.bna) {
+                               CLEAR_OUT_EP_INTR(core_if, epnum, bna);
+                               if (core_if->dma_desc_enable) {
+#ifdef DWC_EN_ISOC
+                                       if (dwc_ep->type ==
+                                           DWC_OTG_EP_TYPE_ISOC) {
+                                               /*
+                                                * This checking is performed to prevent first "false" BNA
+                                                * handling occuring right after reconnect
+                                                */
+                                               if (dwc_ep->next_frame !=
+                                                   0xffffffff)
+                                                       dwc_otg_pcd_handle_iso_bna(ep);
+                                       } else
+#endif                         /* DWC_EN_ISOC */
+                                       {
+                                               dwc_otg_pcd_handle_noniso_bna(ep);
+                                       }
+                               }
+                       }
+                       /* Babble Interrupt */
+                       if (doepint.b.babble) {
+                               DWC_DEBUGPL(DBG_ANY, "EP%d OUT Babble\n",
+                                           epnum);
+                               handle_out_ep_babble_intr(pcd, epnum);
+
+                               CLEAR_OUT_EP_INTR(core_if, epnum, babble);
+                       }
+                       if (doepint.b.outtknepdis) {
+                               DWC_DEBUGPL(DBG_ANY, "EP%d OUT Token received when EP is \
+                                       disabled\n",epnum);
+                               if (ep->dwc_ep.type == DWC_OTG_EP_TYPE_ISOC) {
+                                       doepmsk_data_t doepmsk = {.d32 = 0};
+                                       ep->dwc_ep.frame_num = core_if->frame_num;
+                                       if (ep->dwc_ep.bInterval > 1) {
+                                               depctl_data_t depctl;
+                                               depctl.d32 = DWC_READ_REG32(&core_if->dev_if->
+                                                                                                       out_ep_regs[epnum]->doepctl);
+                                               if (ep->dwc_ep.frame_num & 0x1) {
+                                                       depctl.b.setd1pid = 1;
+                                                       depctl.b.setd0pid = 0;
+                                               } else {
+                                                       depctl.b.setd0pid = 1;
+                                                       depctl.b.setd1pid = 0;
+                                               }
+                                               DWC_WRITE_REG32(&core_if->dev_if->
+                                                                               out_ep_regs[epnum]->doepctl, depctl.d32);
+                                       }
+                                       start_next_request(ep);
+                                       doepmsk.b.outtknepdis = 1;
+                                       DWC_MODIFY_REG32(&core_if->dev_if->dev_global_regs->doepmsk,
+                                                                doepmsk.d32, 0);
+                               }
+                               CLEAR_OUT_EP_INTR(core_if, epnum, outtknepdis);
+                       }
+
+                       /* NAK Interrutp */
+                       if (doepint.b.nak) {
+                               DWC_DEBUGPL(DBG_ANY, "EP%d OUT NAK\n", epnum);
+                               handle_out_ep_nak_intr(pcd, epnum);
+
+                               CLEAR_OUT_EP_INTR(core_if, epnum, nak);
+                       }
+                       /* NYET Interrutp */
+                       if (doepint.b.nyet) {
+                               DWC_DEBUGPL(DBG_ANY, "EP%d OUT NYET\n", epnum);
+                               handle_out_ep_nyet_intr(pcd, epnum);
+
+                               CLEAR_OUT_EP_INTR(core_if, epnum, nyet);
+                       }
+               }
+
+               epnum++;
+               ep_intr >>= 1;
+       }
+
+       return 1;
+
+#undef CLEAR_OUT_EP_INTR
+}
+static int drop_transfer(uint32_t trgt_fr, uint32_t curr_fr, uint8_t frm_overrun)
+{
+       int retval = 0;
+       if(!frm_overrun && curr_fr >= trgt_fr)
+               retval = 1;
+       else if (frm_overrun
+                && (curr_fr >= trgt_fr && ((curr_fr - trgt_fr) < 0x3FFF / 2)))
+               retval = 1;
+       return retval;
+}
+/**
+ * Incomplete ISO IN Transfer Interrupt.
+ * This interrupt indicates one of the following conditions occurred
+ * while transmitting an ISOC transaction.
+ * - Corrupted IN Token for ISOC EP.
+ * - Packet not complete in FIFO.
+ * The follow actions will be taken:
+ *     -#      Determine the EP
+ *     -#      Set incomplete flag in dwc_ep structure
+ *     -#      Disable EP; when "Endpoint Disabled" interrupt is received
+ *             Flush FIFO
+ */
+int32_t dwc_otg_pcd_handle_incomplete_isoc_in_intr(dwc_otg_pcd_t * pcd)
+{
+       gintsts_data_t gintsts;
+
+#ifdef DWC_EN_ISOC
+       dwc_otg_dev_if_t *dev_if;
+       deptsiz_data_t deptsiz = {.d32 = 0 };
+       depctl_data_t depctl = {.d32 = 0 };
+       dsts_data_t dsts = {.d32 = 0 };
+       dwc_ep_t *dwc_ep;
+       int i;
+
+       dev_if = GET_CORE_IF(pcd)->dev_if;
+
+       for (i = 1; i <= dev_if->num_in_eps; ++i) {
+               dwc_ep = &pcd->in_ep[i].dwc_ep;
+               if (dwc_ep->active && dwc_ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                       deptsiz.d32 =
+                           DWC_READ_REG32(&dev_if->in_ep_regs[i]->dieptsiz);
+                       depctl.d32 =
+                           DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepctl);
+
+                       if (depctl.b.epdis && deptsiz.d32) {
+                               set_current_pkt_info(GET_CORE_IF(pcd), dwc_ep);
+                               if (dwc_ep->cur_pkt >= dwc_ep->pkt_cnt) {
+                                       dwc_ep->cur_pkt = 0;
+                                       dwc_ep->proc_buf_num =
+                                           (dwc_ep->proc_buf_num ^ 1) & 0x1;
+
+                                       if (dwc_ep->proc_buf_num) {
+                                               dwc_ep->cur_pkt_addr =
+                                                   dwc_ep->xfer_buff1;
+                                               dwc_ep->cur_pkt_dma_addr =
+                                                   dwc_ep->dma_addr1;
+                                       } else {
+                                               dwc_ep->cur_pkt_addr =
+                                                   dwc_ep->xfer_buff0;
+                                               dwc_ep->cur_pkt_dma_addr =
+                                                   dwc_ep->dma_addr0;
+                                       }
+
+                               }
+
+                               dsts.d32 =
+                                   DWC_READ_REG32(&GET_CORE_IF(pcd)->dev_if->
+                                                  dev_global_regs->dsts);
+                               dwc_ep->next_frame = dsts.b.soffn;
+
+                               dwc_otg_iso_ep_start_frm_transfer(GET_CORE_IF
+                                                                 (pcd),
+                                                                 dwc_ep);
+                       }
+               }
+       }
+
+#else
+       depctl_data_t depctl = {.d32 = 0 };
+       dwc_ep_t *dwc_ep;
+       dwc_otg_dev_if_t *dev_if;
+       int i;
+       dev_if = GET_CORE_IF(pcd)->dev_if;
+
+       DWC_DEBUGPL(DBG_PCD,"Incomplete ISO IN \n");
+
+       for (i = 1; i <= dev_if->num_in_eps; ++i) {
+               dwc_ep = &pcd->in_ep[i-1].dwc_ep;
+               depctl.d32 =
+                       DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepctl);
+               if (depctl.b.epena && dwc_ep->type == DWC_OTG_EP_TYPE_ISOC) {
+                       if (drop_transfer(dwc_ep->frame_num, GET_CORE_IF(pcd)->frame_num,
+                                                       dwc_ep->frm_overrun))
+                       {
+                               depctl.d32 =
+                                       DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepctl);
+                               depctl.b.snak = 1;
+                               depctl.b.epdis = 1;
+                               DWC_MODIFY_REG32(&dev_if->in_ep_regs[i]->diepctl, depctl.d32, depctl.d32);
+                       }
+               }
+       }
+
+       /*intr_mask.b.incomplisoin = 1;
+       DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintmsk,
+                        intr_mask.d32, 0);      */
+#endif                         //DWC_EN_ISOC
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.incomplisoin = 1;
+       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintsts,
+                       gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * Incomplete ISO OUT Transfer Interrupt.
+ *
+ * This interrupt indicates that the core has dropped an ISO OUT
+ * packet. The following conditions can be the cause:
+ * - FIFO Full, the entire packet would not fit in the FIFO.
+ * - CRC Error
+ * - Corrupted Token
+ * The follow actions will be taken:
+ *     -#      Determine the EP
+ *     -#      Set incomplete flag in dwc_ep structure
+ *     -#      Read any data from the FIFO
+ *     -#      Disable EP. When "Endpoint Disabled" interrupt is received
+ *             re-enable EP.
+ */
+int32_t dwc_otg_pcd_handle_incomplete_isoc_out_intr(dwc_otg_pcd_t * pcd)
+{
+
+       gintsts_data_t gintsts;
+
+#ifdef DWC_EN_ISOC
+       dwc_otg_dev_if_t *dev_if;
+       deptsiz_data_t deptsiz = {.d32 = 0 };
+       depctl_data_t depctl = {.d32 = 0 };
+       dsts_data_t dsts = {.d32 = 0 };
+       dwc_ep_t *dwc_ep;
+       int i;
+
+       dev_if = GET_CORE_IF(pcd)->dev_if;
+
+       for (i = 1; i <= dev_if->num_out_eps; ++i) {
+               dwc_ep = &pcd->in_ep[i].dwc_ep;
+               if (pcd->out_ep[i].dwc_ep.active &&
+                   pcd->out_ep[i].dwc_ep.type == DWC_OTG_EP_TYPE_ISOC) {
+                       deptsiz.d32 =
+                           DWC_READ_REG32(&dev_if->out_ep_regs[i]->doeptsiz);
+                       depctl.d32 =
+                           DWC_READ_REG32(&dev_if->out_ep_regs[i]->doepctl);
+
+                       if (depctl.b.epdis && deptsiz.d32) {
+                               set_current_pkt_info(GET_CORE_IF(pcd),
+                                                    &pcd->out_ep[i].dwc_ep);
+                               if (dwc_ep->cur_pkt >= dwc_ep->pkt_cnt) {
+                                       dwc_ep->cur_pkt = 0;
+                                       dwc_ep->proc_buf_num =
+                                           (dwc_ep->proc_buf_num ^ 1) & 0x1;
+
+                                       if (dwc_ep->proc_buf_num) {
+                                               dwc_ep->cur_pkt_addr =
+                                                   dwc_ep->xfer_buff1;
+                                               dwc_ep->cur_pkt_dma_addr =
+                                                   dwc_ep->dma_addr1;
+                                       } else {
+                                               dwc_ep->cur_pkt_addr =
+                                                   dwc_ep->xfer_buff0;
+                                               dwc_ep->cur_pkt_dma_addr =
+                                                   dwc_ep->dma_addr0;
+                                       }
+
+                               }
+
+                               dsts.d32 =
+                                   DWC_READ_REG32(&GET_CORE_IF(pcd)->dev_if->
+                                                  dev_global_regs->dsts);
+                               dwc_ep->next_frame = dsts.b.soffn;
+
+                               dwc_otg_iso_ep_start_frm_transfer(GET_CORE_IF
+                                                                 (pcd),
+                                                                 dwc_ep);
+                       }
+               }
+       }
+#else
+       /** @todo implement ISR */
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       dwc_otg_core_if_t *core_if;
+       deptsiz_data_t deptsiz = {.d32 = 0 };
+       depctl_data_t depctl = {.d32 = 0 };
+       dctl_data_t dctl = {.d32 = 0 };
+       dwc_ep_t *dwc_ep = NULL;
+       int i;
+       core_if = GET_CORE_IF(pcd);
+
+       for (i = 0; i < core_if->dev_if->num_out_eps; ++i) {
+               dwc_ep = &pcd->out_ep[i].dwc_ep;
+               depctl.d32 =
+                       DWC_READ_REG32(&core_if->dev_if->out_ep_regs[dwc_ep->num]->doepctl);
+               if (depctl.b.epena && depctl.b.dpid == (core_if->frame_num & 0x1)) {
+                       core_if->dev_if->isoc_ep = dwc_ep;
+                       deptsiz.d32 =
+                                       DWC_READ_REG32(&core_if->dev_if->out_ep_regs[dwc_ep->num]->doeptsiz);
+                               break;
+               }
+       }
+       dctl.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dctl);
+       gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
+       intr_mask.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk);
+
+       if (!intr_mask.b.goutnakeff) {
+               /* Unmask it */
+               intr_mask.b.goutnakeff = 1;
+               DWC_WRITE_REG32(&core_if->core_global_regs->gintmsk, intr_mask.d32);
+       }
+       if (!gintsts.b.goutnakeff) {
+               dctl.b.sgoutnak = 1;
+       }
+       DWC_WRITE_REG32(&core_if->dev_if->dev_global_regs->dctl, dctl.d32);
+
+       depctl.d32 = DWC_READ_REG32(&core_if->dev_if->out_ep_regs[dwc_ep->num]->doepctl);
+       if (depctl.b.epena) {
+               depctl.b.epdis = 1;
+               depctl.b.snak = 1;
+       }
+       DWC_WRITE_REG32(&core_if->dev_if->out_ep_regs[dwc_ep->num]->doepctl, depctl.d32);
+
+       intr_mask.d32 = 0;
+       intr_mask.b.incomplisoout = 1;
+
+#endif /* DWC_EN_ISOC */
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.incomplisoout = 1;
+       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintsts,
+                       gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * This function handles the Global IN NAK Effective interrupt.
+ *
+ */
+int32_t dwc_otg_pcd_handle_in_nak_effective(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_dev_if_t *dev_if = GET_CORE_IF(pcd)->dev_if;
+       depctl_data_t diepctl = {.d32 = 0 };
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       gintsts_data_t gintsts;
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+       int i;
+
+       DWC_DEBUGPL(DBG_PCD, "Global IN NAK Effective\n");
+
+       /* Disable all active IN EPs */
+       for (i = 0; i <= dev_if->num_in_eps; i++) {
+               diepctl.d32 = DWC_READ_REG32(&dev_if->in_ep_regs[i]->diepctl);
+               if (!(diepctl.b.eptype & 1) && diepctl.b.epena) {
+                       if (core_if->start_predict > 0)
+                               core_if->start_predict++;
+                       diepctl.b.epdis = 1;
+                       diepctl.b.snak = 1;
+                       DWC_WRITE_REG32(&dev_if->in_ep_regs[i]->diepctl, diepctl.d32);
+               }
+       }
+
+
+       /* Disable the Global IN NAK Effective Interrupt */
+       intr_mask.b.ginnakeff = 1;
+       DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintmsk,
+                        intr_mask.d32, 0);
+
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.ginnakeff = 1;
+       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintsts,
+                       gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * OUT NAK Effective.
+ *
+ */
+int32_t dwc_otg_pcd_handle_out_nak_effective(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_dev_if_t *dev_if = GET_CORE_IF(pcd)->dev_if;
+       gintmsk_data_t intr_mask = {.d32 = 0 };
+       gintsts_data_t gintsts;
+       depctl_data_t doepctl;
+       int i;
+
+       /* Disable the Global OUT NAK Effective Interrupt */
+       intr_mask.b.goutnakeff = 1;
+       DWC_MODIFY_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintmsk,
+               intr_mask.d32, 0);
+
+       /* If DEV OUT NAK enabled*/
+       if (pcd->core_if->core_params->dev_out_nak) {
+               /* Run over all out endpoints to determine the ep number on
+                * which the timeout has happened
+                */
+               for (i = 0; i <= dev_if->num_out_eps; i++) {
+                       if ( pcd->core_if->ep_xfer_info[i].state == 2 )
+                               break;
+               }
+               if (i > dev_if->num_out_eps) {
+                       dctl_data_t dctl;
+                       dctl.d32 =
+                           DWC_READ_REG32(&dev_if->dev_global_regs->dctl);
+                       dctl.b.cgoutnak = 1;
+                       DWC_WRITE_REG32(&dev_if->dev_global_regs->dctl,
+                               dctl.d32);
+                       goto out;
+               }
+
+               /* Disable the endpoint */
+               doepctl.d32 = DWC_READ_REG32(&dev_if->out_ep_regs[i]->doepctl);
+               if (doepctl.b.epena) {
+                       doepctl.b.epdis = 1;
+                       doepctl.b.snak = 1;
+               }
+               DWC_WRITE_REG32(&dev_if->out_ep_regs[i]->doepctl, doepctl.d32);
+               return 1;
+       }
+       /* We come here from Incomplete ISO OUT handler */
+       if (dev_if->isoc_ep) {
+               dwc_ep_t *dwc_ep = (dwc_ep_t *)dev_if->isoc_ep;
+               uint32_t epnum = dwc_ep->num;
+               doepint_data_t doepint;
+               doepint.d32 =
+                   DWC_READ_REG32(&dev_if->out_ep_regs[dwc_ep->num]->doepint);
+               dev_if->isoc_ep = NULL;
+               doepctl.d32 =
+                   DWC_READ_REG32(&dev_if->out_ep_regs[epnum]->doepctl);
+               DWC_PRINTF("Before disable DOEPCTL = %08x\n", doepctl.d32);
+               if (doepctl.b.epena) {
+                       doepctl.b.epdis = 1;
+                       doepctl.b.snak = 1;
+               }
+               DWC_WRITE_REG32(&dev_if->out_ep_regs[epnum]->doepctl,
+                               doepctl.d32);
+               return 1;
+       } else
+               DWC_PRINTF("INTERRUPT Handler not implemented for %s\n",
+                          "Global OUT NAK Effective\n");
+
+out:
+       /* Clear interrupt */
+       gintsts.d32 = 0;
+       gintsts.b.goutnakeff = 1;
+       DWC_WRITE_REG32(&GET_CORE_IF(pcd)->core_global_regs->gintsts,
+                       gintsts.d32);
+
+       return 1;
+}
+
+/**
+ * PCD interrupt handler.
+ *
+ * The PCD handles the device interrupts.  Many conditions can cause a
+ * device interrupt. When an interrupt occurs, the device interrupt
+ * service routine determines the cause of the interrupt and
+ * dispatches handling to the appropriate function. These interrupt
+ * handling functions are described below.
+ *
+ * All interrupt registers are processed from LSB to MSB.
+ *
+ */
+int32_t dwc_otg_pcd_handle_intr(dwc_otg_pcd_t * pcd)
+{
+       dwc_otg_core_if_t *core_if = GET_CORE_IF(pcd);
+#ifdef VERBOSE
+       dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
+#endif
+       gintsts_data_t gintr_status;
+       int32_t retval = 0;
+
+       /* Exit from ISR if core is hibernated */
+       if (core_if->hibernation_suspend == 1) {
+               return retval;
+       }
+#ifdef VERBOSE
+       DWC_DEBUGPL(DBG_ANY, "%s() gintsts=%08x  gintmsk=%08x\n",
+                   __func__,
+                   DWC_READ_REG32(&global_regs->gintsts),
+                   DWC_READ_REG32(&global_regs->gintmsk));
+#endif
+
+       if (dwc_otg_is_device_mode(core_if)) {
+               DWC_SPINLOCK(pcd->lock);
+#ifdef VERBOSE
+               DWC_DEBUGPL(DBG_PCDV, "%s() gintsts=%08x  gintmsk=%08x\n",
+                           __func__,
+                           DWC_READ_REG32(&global_regs->gintsts),
+                           DWC_READ_REG32(&global_regs->gintmsk));
+#endif
+
+               gintr_status.d32 = dwc_otg_read_core_intr(core_if);
+
+               DWC_DEBUGPL(DBG_PCDV, "%s: gintsts&gintmsk=%08x\n",
+                           __func__, gintr_status.d32);
+
+               if (gintr_status.b.sofintr) {
+                       retval |= dwc_otg_pcd_handle_sof_intr(pcd);
+               }
+               if (gintr_status.b.rxstsqlvl) {
+                       retval |=
+                           dwc_otg_pcd_handle_rx_status_q_level_intr(pcd);
+               }
+               if (gintr_status.b.nptxfempty) {
+                       retval |= dwc_otg_pcd_handle_np_tx_fifo_empty_intr(pcd);
+               }
+               if (gintr_status.b.goutnakeff) {
+                       retval |= dwc_otg_pcd_handle_out_nak_effective(pcd);
+               }
+               if (gintr_status.b.i2cintr) {
+                       retval |= dwc_otg_pcd_handle_i2c_intr(pcd);
+               }
+               if (gintr_status.b.erlysuspend) {
+                       retval |= dwc_otg_pcd_handle_early_suspend_intr(pcd);
+               }
+               if (gintr_status.b.usbreset) {
+                       retval |= dwc_otg_pcd_handle_usb_reset_intr(pcd);
+               }
+               if (gintr_status.b.enumdone) {
+                       retval |= dwc_otg_pcd_handle_enum_done_intr(pcd);
+               }
+               if (gintr_status.b.isooutdrop) {
+                       retval |=
+                           dwc_otg_pcd_handle_isoc_out_packet_dropped_intr
+                           (pcd);
+               }
+               if (gintr_status.b.eopframe) {
+                       retval |=
+                           dwc_otg_pcd_handle_end_periodic_frame_intr(pcd);
+               }
+               if (gintr_status.b.inepint) {
+                       if (!core_if->multiproc_int_enable) {
+                               retval |= dwc_otg_pcd_handle_in_ep_intr(pcd);
+                       }
+               }
+               if (gintr_status.b.outepintr) {
+                       if (!core_if->multiproc_int_enable) {
+                               retval |= dwc_otg_pcd_handle_out_ep_intr(pcd);
+                       }
+               }
+               if (gintr_status.b.epmismatch) {
+                       retval |= dwc_otg_pcd_handle_ep_mismatch_intr(pcd);
+               }
+               if (gintr_status.b.fetsusp) {
+                       retval |= dwc_otg_pcd_handle_ep_fetsusp_intr(pcd);
+               }
+               if (gintr_status.b.ginnakeff) {
+                       retval |= dwc_otg_pcd_handle_in_nak_effective(pcd);
+               }
+               if (gintr_status.b.incomplisoin) {
+                       retval |=
+                           dwc_otg_pcd_handle_incomplete_isoc_in_intr(pcd);
+               }
+               if (gintr_status.b.incomplisoout) {
+                       retval |=
+                           dwc_otg_pcd_handle_incomplete_isoc_out_intr(pcd);
+               }
+
+               /* In MPI mode Device Endpoints interrupts are asserted
+                * without setting outepintr and inepint bits set, so these
+                * Interrupt handlers are called without checking these bit-fields
+                */
+               if (core_if->multiproc_int_enable) {
+                       retval |= dwc_otg_pcd_handle_in_ep_intr(pcd);
+                       retval |= dwc_otg_pcd_handle_out_ep_intr(pcd);
+               }
+#ifdef VERBOSE
+               DWC_DEBUGPL(DBG_PCDV, "%s() gintsts=%0x\n", __func__,
+                           DWC_READ_REG32(&global_regs->gintsts));
+#endif
+               DWC_SPINUNLOCK(pcd->lock);
+       }
+       return retval;
+}
+
+#endif /* DWC_HOST_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_pcd_linux.c
@@ -0,0 +1,1262 @@
+ /* ==========================================================================
+  * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_pcd_linux.c $
+  * $Revision: #21 $
+  * $Date: 2012/08/10 $
+  * $Change: 2047372 $
+  *
+  * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+  * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+  * otherwise expressly agreed to in writing between Synopsys and you.
+  *
+  * The Software IS NOT an item of Licensed Software or Licensed Product under
+  * any End User Software License Agreement or Agreement for Licensed Product
+  * with Synopsys or any supplement thereto. You are permitted to use and
+  * redistribute this Software in source and binary forms, with or without
+  * modification, provided that redistributions of source code must retain this
+  * notice. You may not view, use, disclose, copy or distribute this file or
+  * any information contained herein except pursuant to this license grant from
+  * Synopsys. If you do not agree with this notice, including the disclaimer
+  * below, then you are not authorized to use the Software.
+  *
+  * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+  * DAMAGE.
+  * ========================================================================== */
+#ifndef DWC_HOST_ONLY
+
+/** @file
+ * This file implements the Peripheral Controller Driver.
+ *
+ * The Peripheral Controller Driver (PCD) is responsible for
+ * translating requests from the Function Driver into the appropriate
+ * actions on the DWC_otg controller. It isolates the Function Driver
+ * from the specifics of the controller by providing an API to the
+ * Function Driver.
+ *
+ * The Peripheral Controller Driver for Linux will implement the
+ * Gadget API, so that the existing Gadget drivers can be used.
+ * (Gadget Driver is the Linux terminology for a Function Driver.)
+ *
+ * The Linux Gadget API is defined in the header file
+ * <code><linux/usb_gadget.h></code>.  The USB EP operations API is
+ * defined in the structure <code>usb_ep_ops</code> and the USB
+ * Controller API is defined in the structure
+ * <code>usb_gadget_ops</code>.
+ *
+ */
+
+#include "dwc_otg_os_dep.h"
+#include "dwc_otg_pcd_if.h"
+#include "dwc_otg_pcd.h"
+#include "dwc_otg_driver.h"
+#include "dwc_otg_dbg.h"
+
+extern bool fiq_enable;
+
+static struct gadget_wrapper {
+       dwc_otg_pcd_t *pcd;
+
+       struct usb_gadget gadget;
+       struct usb_gadget_driver *driver;
+
+       struct usb_ep ep0;
+       struct usb_ep in_ep[16];
+       struct usb_ep out_ep[16];
+
+} *gadget_wrapper;
+
+/* Display the contents of the buffer */
+extern void dump_msg(const u8 * buf, unsigned int length);
+/**
+ * Get the dwc_otg_pcd_ep_t* from usb_ep* pointer - NULL in case
+ * if the endpoint is not found
+ */
+static struct dwc_otg_pcd_ep *ep_from_handle(dwc_otg_pcd_t * pcd, void *handle)
+{
+       int i;
+       if (pcd->ep0.priv == handle) {
+               return &pcd->ep0;
+       }
+
+       for (i = 0; i < MAX_EPS_CHANNELS - 1; i++) {
+               if (pcd->in_ep[i].priv == handle)
+                       return &pcd->in_ep[i];
+               if (pcd->out_ep[i].priv == handle)
+                       return &pcd->out_ep[i];
+       }
+
+       return NULL;
+}
+
+/* USB Endpoint Operations */
+/*
+ * The following sections briefly describe the behavior of the Gadget
+ * API endpoint operations implemented in the DWC_otg driver
+ * software. Detailed descriptions of the generic behavior of each of
+ * these functions can be found in the Linux header file
+ * include/linux/usb_gadget.h.
+ *
+ * The Gadget API provides wrapper functions for each of the function
+ * pointers defined in usb_ep_ops. The Gadget Driver calls the wrapper
+ * function, which then calls the underlying PCD function. The
+ * following sections are named according to the wrapper
+ * functions. Within each section, the corresponding DWC_otg PCD
+ * function name is specified.
+ *
+ */
+
+/**
+ * This function is called by the Gadget Driver for each EP to be
+ * configured for the current configuration (SET_CONFIGURATION).
+ *
+ * This function initializes the dwc_otg_ep_t data structure, and then
+ * calls dwc_otg_ep_activate.
+ */
+static int ep_enable(struct usb_ep *usb_ep,
+                    const struct usb_endpoint_descriptor *ep_desc)
+{
+       int retval;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p)\n", __func__, usb_ep, ep_desc);
+
+       if (!usb_ep || !ep_desc || ep_desc->bDescriptorType != USB_DT_ENDPOINT) {
+               DWC_WARN("%s, bad ep or descriptor\n", __func__);
+               return -EINVAL;
+       }
+       if (usb_ep == &gadget_wrapper->ep0) {
+               DWC_WARN("%s, bad ep(0)\n", __func__);
+               return -EINVAL;
+       }
+
+       /* Check FIFO size? */
+       if (!ep_desc->wMaxPacketSize) {
+               DWC_WARN("%s, bad %s maxpacket\n", __func__, usb_ep->name);
+               return -ERANGE;
+       }
+
+       if (!gadget_wrapper->driver ||
+           gadget_wrapper->gadget.speed == USB_SPEED_UNKNOWN) {
+               DWC_WARN("%s, bogus device state\n", __func__);
+               return -ESHUTDOWN;
+       }
+
+       /* Delete after check - MAS */
+#if 0
+       nat = (uint32_t) ep_desc->wMaxPacketSize;
+       printk(KERN_ALERT "%s: nat (before) =%d\n", __func__, nat);
+       nat = (nat >> 11) & 0x03;
+       printk(KERN_ALERT "%s: nat (after) =%d\n", __func__, nat);
+#endif
+       retval = dwc_otg_pcd_ep_enable(gadget_wrapper->pcd,
+                                      (const uint8_t *)ep_desc,
+                                      (void *)usb_ep);
+       if (retval) {
+               DWC_WARN("dwc_otg_pcd_ep_enable failed\n");
+               return -EINVAL;
+       }
+
+       usb_ep->maxpacket = le16_to_cpu(ep_desc->wMaxPacketSize);
+
+       return 0;
+}
+
+/**
+ * This function is called when an EP is disabled due to disconnect or
+ * change in configuration. Any pending requests will terminate with a
+ * status of -ESHUTDOWN.
+ *
+ * This function modifies the dwc_otg_ep_t data structure for this EP,
+ * and then calls dwc_otg_ep_deactivate.
+ */
+static int ep_disable(struct usb_ep *usb_ep)
+{
+       int retval;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, usb_ep);
+       if (!usb_ep) {
+               DWC_DEBUGPL(DBG_PCD, "%s, %s not enabled\n", __func__,
+                           usb_ep ? usb_ep->name : NULL);
+               return -EINVAL;
+       }
+
+       retval = dwc_otg_pcd_ep_disable(gadget_wrapper->pcd, usb_ep);
+       if (retval) {
+               retval = -EINVAL;
+       }
+
+       return retval;
+}
+
+/**
+ * This function allocates a request object to use with the specified
+ * endpoint.
+ *
+ * @param ep The endpoint to be used with with the request
+ * @param gfp_flags the GFP_* flags to use.
+ */
+static struct usb_request *dwc_otg_pcd_alloc_request(struct usb_ep *ep,
+                                                    gfp_t gfp_flags)
+{
+       struct usb_request *usb_req;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p,%d)\n", __func__, ep, gfp_flags);
+       if (0 == ep) {
+               DWC_WARN("%s() %s\n", __func__, "Invalid EP!\n");
+               return 0;
+       }
+       usb_req = kzalloc(sizeof(*usb_req), gfp_flags);
+       if (0 == usb_req) {
+               DWC_WARN("%s() %s\n", __func__, "request allocation failed!\n");
+               return 0;
+       }
+       usb_req->dma = DWC_DMA_ADDR_INVALID;
+
+       return usb_req;
+}
+
+/**
+ * This function frees a request object.
+ *
+ * @param ep The endpoint associated with the request
+ * @param req The request being freed
+ */
+static void dwc_otg_pcd_free_request(struct usb_ep *ep, struct usb_request *req)
+{
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p)\n", __func__, ep, req);
+
+       if (0 == ep || 0 == req) {
+               DWC_WARN("%s() %s\n", __func__,
+                        "Invalid ep or req argument!\n");
+               return;
+       }
+
+       kfree(req);
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+/**
+ * This function allocates an I/O buffer to be used for a transfer
+ * to/from the specified endpoint.
+ *
+ * @param usb_ep The endpoint to be used with with the request
+ * @param bytes The desired number of bytes for the buffer
+ * @param dma Pointer to the buffer's DMA address; must be valid
+ * @param gfp_flags the GFP_* flags to use.
+ * @return address of a new buffer or null is buffer could not be allocated.
+ */
+static void *dwc_otg_pcd_alloc_buffer(struct usb_ep *usb_ep, unsigned bytes,
+                                     dma_addr_t * dma, gfp_t gfp_flags)
+{
+       void *buf;
+       dwc_otg_pcd_t *pcd = 0;
+
+       pcd = gadget_wrapper->pcd;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p,%d,%p,%0x)\n", __func__, usb_ep, bytes,
+                   dma, gfp_flags);
+
+       /* Check dword alignment */
+       if ((bytes & 0x3UL) != 0) {
+               DWC_WARN("%s() Buffer size is not a multiple of"
+                        "DWORD size (%d)", __func__, bytes);
+       }
+
+       buf = dma_alloc_coherent(NULL, bytes, dma, gfp_flags);
+       WARN_ON(!buf);
+
+       /* Check dword alignment */
+       if (((int)buf & 0x3UL) != 0) {
+               DWC_WARN("%s() Buffer is not DWORD aligned (%p)",
+                        __func__, buf);
+       }
+
+       return buf;
+}
+
+/**
+ * This function frees an I/O buffer that was allocated by alloc_buffer.
+ *
+ * @param usb_ep the endpoint associated with the buffer
+ * @param buf address of the buffer
+ * @param dma The buffer's DMA address
+ * @param bytes The number of bytes of the buffer
+ */
+static void dwc_otg_pcd_free_buffer(struct usb_ep *usb_ep, void *buf,
+                                   dma_addr_t dma, unsigned bytes)
+{
+       dwc_otg_pcd_t *pcd = 0;
+
+       pcd = gadget_wrapper->pcd;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p,%0x,%d)\n", __func__, buf, dma, bytes);
+
+       dma_free_coherent(NULL, bytes, buf, dma);
+}
+#endif
+
+/**
+ * This function is used to submit an I/O Request to an EP.
+ *
+ *     - When the request completes the request's completion callback
+ *       is called to return the request to the driver.
+ *     - An EP, except control EPs, may have multiple requests
+ *       pending.
+ *     - Once submitted the request cannot be examined or modified.
+ *     - Each request is turned into one or more packets.
+ *     - A BULK EP can queue any amount of data; the transfer is
+ *       packetized.
+ *     - Zero length Packets are specified with the request 'zero'
+ *       flag.
+ */
+static int ep_queue(struct usb_ep *usb_ep, struct usb_request *usb_req,
+                   gfp_t gfp_flags)
+{
+       dwc_otg_pcd_t *pcd;
+       struct dwc_otg_pcd_ep *ep = NULL;
+       int retval = 0, is_isoc_ep = 0;
+       dma_addr_t dma_addr = DWC_DMA_ADDR_INVALID;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p,%d)\n",
+                   __func__, usb_ep, usb_req, gfp_flags);
+
+       if (!usb_req || !usb_req->complete || !usb_req->buf) {
+               DWC_WARN("bad params\n");
+               return -EINVAL;
+       }
+
+       if (!usb_ep) {
+               DWC_WARN("bad ep\n");
+               return -EINVAL;
+       }
+
+       pcd = gadget_wrapper->pcd;
+       if (!gadget_wrapper->driver ||
+           gadget_wrapper->gadget.speed == USB_SPEED_UNKNOWN) {
+               DWC_DEBUGPL(DBG_PCDV, "gadget.speed=%d\n",
+                           gadget_wrapper->gadget.speed);
+               DWC_WARN("bogus device state\n");
+               return -ESHUTDOWN;
+       }
+
+       DWC_DEBUGPL(DBG_PCD, "%s queue req %p, len %d buf %p\n",
+                   usb_ep->name, usb_req, usb_req->length, usb_req->buf);
+
+       usb_req->status = -EINPROGRESS;
+       usb_req->actual = 0;
+
+       ep = ep_from_handle(pcd, usb_ep);
+       if (ep == NULL)
+               is_isoc_ep = 0;
+       else
+               is_isoc_ep = (ep->dwc_ep.type == DWC_OTG_EP_TYPE_ISOC) ? 1 : 0;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+       dma_addr = usb_req->dma;
+#else
+       if (GET_CORE_IF(pcd)->dma_enable) {
+                dwc_otg_device_t *otg_dev = gadget_wrapper->pcd->otg_dev;
+                struct device *dev = NULL;
+
+                if (otg_dev != NULL)
+                        dev = DWC_OTG_OS_GETDEV(otg_dev->os_dep);
+
+               if (usb_req->length != 0 &&
+                    usb_req->dma == DWC_DMA_ADDR_INVALID) {
+                        dma_addr = dma_map_single(dev, usb_req->buf,
+                                                  usb_req->length,
+                                                  ep->dwc_ep.is_in ?
+                                                        DMA_TO_DEVICE:
+                                                        DMA_FROM_DEVICE);
+               }
+       }
+#endif
+
+#ifdef DWC_UTE_PER_IO
+       if (is_isoc_ep == 1) {
+               retval = dwc_otg_pcd_xiso_ep_queue(pcd, usb_ep, usb_req->buf, dma_addr,
+                       usb_req->length, usb_req->zero, usb_req,
+                       gfp_flags == GFP_ATOMIC ? 1 : 0, &usb_req->ext_req);
+               if (retval)
+                       return -EINVAL;
+
+               return 0;
+       }
+#endif
+       retval = dwc_otg_pcd_ep_queue(pcd, usb_ep, usb_req->buf, dma_addr,
+                                     usb_req->length, usb_req->zero, usb_req,
+                                     gfp_flags == GFP_ATOMIC ? 1 : 0);
+       if (retval) {
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+/**
+ * This function cancels an I/O request from an EP.
+ */
+static int ep_dequeue(struct usb_ep *usb_ep, struct usb_request *usb_req)
+{
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p)\n", __func__, usb_ep, usb_req);
+
+       if (!usb_ep || !usb_req) {
+               DWC_WARN("bad argument\n");
+               return -EINVAL;
+       }
+       if (!gadget_wrapper->driver ||
+           gadget_wrapper->gadget.speed == USB_SPEED_UNKNOWN) {
+               DWC_WARN("bogus device state\n");
+               return -ESHUTDOWN;
+       }
+       if (dwc_otg_pcd_ep_dequeue(gadget_wrapper->pcd, usb_ep, usb_req)) {
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+/**
+ * usb_ep_set_halt stalls an endpoint.
+ *
+ * usb_ep_clear_halt clears an endpoint halt and resets its data
+ * toggle.
+ *
+ * Both of these functions are implemented with the same underlying
+ * function. The behavior depends on the value argument.
+ *
+ * @param[in] usb_ep the Endpoint to halt or clear halt.
+ * @param[in] value
+ *     - 0 means clear_halt.
+ *     - 1 means set_halt,
+ *     - 2 means clear stall lock flag.
+ *     - 3 means set  stall lock flag.
+ */
+static int ep_halt(struct usb_ep *usb_ep, int value)
+{
+       int retval = 0;
+
+       DWC_DEBUGPL(DBG_PCD, "HALT %s %d\n", usb_ep->name, value);
+
+       if (!usb_ep) {
+               DWC_WARN("bad ep\n");
+               return -EINVAL;
+       }
+
+       retval = dwc_otg_pcd_ep_halt(gadget_wrapper->pcd, usb_ep, value);
+       if (retval == -DWC_E_AGAIN) {
+               return -EAGAIN;
+       } else if (retval) {
+               retval = -EINVAL;
+       }
+
+       return retval;
+}
+
+//#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30))
+#if 0
+/**
+ * ep_wedge: sets the halt feature and ignores clear requests
+ *
+ * @usb_ep: the endpoint being wedged
+ *
+ * Use this to stall an endpoint and ignore CLEAR_FEATURE(HALT_ENDPOINT)
+ * requests. If the gadget driver clears the halt status, it will
+ * automatically unwedge the endpoint.
+ *
+ * Returns zero on success, else negative errno. *
+ * Check usb_ep_set_wedge() at "usb_gadget.h" for details
+ */
+static int ep_wedge(struct usb_ep *usb_ep)
+{
+       int retval = 0;
+
+       DWC_DEBUGPL(DBG_PCD, "WEDGE %s\n", usb_ep->name);
+
+       if (!usb_ep) {
+               DWC_WARN("bad ep\n");
+               return -EINVAL;
+       }
+
+       retval = dwc_otg_pcd_ep_wedge(gadget_wrapper->pcd, usb_ep);
+       if (retval == -DWC_E_AGAIN) {
+               retval = -EAGAIN;
+       } else if (retval) {
+               retval = -EINVAL;
+       }
+
+       return retval;
+}
+#endif
+
+#ifdef DWC_EN_ISOC
+/**
+ * This function is used to submit an ISOC Transfer Request to an EP.
+ *
+ *     - Every time a sync period completes the request's completion callback
+ *       is called to provide data to the gadget driver.
+ *     - Once submitted the request cannot be modified.
+ *     - Each request is turned into periodic data packets untill ISO
+ *       Transfer is stopped..
+ */
+static int iso_ep_start(struct usb_ep *usb_ep, struct usb_iso_request *req,
+                       gfp_t gfp_flags)
+{
+       int retval = 0;
+
+       if (!req || !req->process_buffer || !req->buf0 || !req->buf1) {
+               DWC_WARN("bad params\n");
+               return -EINVAL;
+       }
+
+       if (!usb_ep) {
+               DWC_PRINTF("bad params\n");
+               return -EINVAL;
+       }
+
+       req->status = -EINPROGRESS;
+
+       retval =
+           dwc_otg_pcd_iso_ep_start(gadget_wrapper->pcd, usb_ep, req->buf0,
+                                    req->buf1, req->dma0, req->dma1,
+                                    req->sync_frame, req->data_pattern_frame,
+                                    req->data_per_frame,
+                                    req->
+                                    flags & USB_REQ_ISO_ASAP ? -1 :
+                                    req->start_frame, req->buf_proc_intrvl,
+                                    req, gfp_flags == GFP_ATOMIC ? 1 : 0);
+
+       if (retval) {
+               return -EINVAL;
+       }
+
+       return retval;
+}
+
+/**
+ * This function stops ISO EP Periodic Data Transfer.
+ */
+static int iso_ep_stop(struct usb_ep *usb_ep, struct usb_iso_request *req)
+{
+       int retval = 0;
+       if (!usb_ep) {
+               DWC_WARN("bad ep\n");
+       }
+
+       if (!gadget_wrapper->driver ||
+           gadget_wrapper->gadget.speed == USB_SPEED_UNKNOWN) {
+               DWC_DEBUGPL(DBG_PCDV, "gadget.speed=%d\n",
+                           gadget_wrapper->gadget.speed);
+               DWC_WARN("bogus device state\n");
+       }
+
+       dwc_otg_pcd_iso_ep_stop(gadget_wrapper->pcd, usb_ep, req);
+       if (retval) {
+               retval = -EINVAL;
+       }
+
+       return retval;
+}
+
+static struct usb_iso_request *alloc_iso_request(struct usb_ep *ep,
+                                                int packets, gfp_t gfp_flags)
+{
+       struct usb_iso_request *pReq = NULL;
+       uint32_t req_size;
+
+       req_size = sizeof(struct usb_iso_request);
+       req_size +=
+           (2 * packets * (sizeof(struct usb_gadget_iso_packet_descriptor)));
+
+       pReq = kmalloc(req_size, gfp_flags);
+       if (!pReq) {
+               DWC_WARN("Can't allocate Iso Request\n");
+               return 0;
+       }
+       pReq->iso_packet_desc0 = (void *)(pReq + 1);
+
+       pReq->iso_packet_desc1 = pReq->iso_packet_desc0 + packets;
+
+       return pReq;
+}
+
+static void free_iso_request(struct usb_ep *ep, struct usb_iso_request *req)
+{
+       kfree(req);
+}
+
+static struct usb_isoc_ep_ops dwc_otg_pcd_ep_ops = {
+       .ep_ops = {
+                  .enable = ep_enable,
+                  .disable = ep_disable,
+
+                  .alloc_request = dwc_otg_pcd_alloc_request,
+                  .free_request = dwc_otg_pcd_free_request,
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+                  .alloc_buffer = dwc_otg_pcd_alloc_buffer,
+                  .free_buffer = dwc_otg_pcd_free_buffer,
+#endif
+
+                  .queue = ep_queue,
+                  .dequeue = ep_dequeue,
+
+                  .set_halt = ep_halt,
+                  .fifo_status = 0,
+                  .fifo_flush = 0,
+                  },
+       .iso_ep_start = iso_ep_start,
+       .iso_ep_stop = iso_ep_stop,
+       .alloc_iso_request = alloc_iso_request,
+       .free_iso_request = free_iso_request,
+};
+
+#else
+
+       int (*enable) (struct usb_ep *ep,
+               const struct usb_endpoint_descriptor *desc);
+       int (*disable) (struct usb_ep *ep);
+
+       struct usb_request *(*alloc_request) (struct usb_ep *ep,
+               gfp_t gfp_flags);
+       void (*free_request) (struct usb_ep *ep, struct usb_request *req);
+
+       int (*queue) (struct usb_ep *ep, struct usb_request *req,
+               gfp_t gfp_flags);
+       int (*dequeue) (struct usb_ep *ep, struct usb_request *req);
+
+       int (*set_halt) (struct usb_ep *ep, int value);
+       int (*set_wedge) (struct usb_ep *ep);
+
+       int (*fifo_status) (struct usb_ep *ep);
+       void (*fifo_flush) (struct usb_ep *ep);
+static struct usb_ep_ops dwc_otg_pcd_ep_ops = {
+       .enable = ep_enable,
+       .disable = ep_disable,
+
+       .alloc_request = dwc_otg_pcd_alloc_request,
+       .free_request = dwc_otg_pcd_free_request,
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
+       .alloc_buffer = dwc_otg_pcd_alloc_buffer,
+       .free_buffer = dwc_otg_pcd_free_buffer,
+#else
+       /* .set_wedge = ep_wedge, */
+        .set_wedge = NULL, /* uses set_halt instead */
+#endif
+
+       .queue = ep_queue,
+       .dequeue = ep_dequeue,
+
+       .set_halt = ep_halt,
+       .fifo_status = 0,
+       .fifo_flush = 0,
+
+};
+
+#endif /* _EN_ISOC_ */
+/*     Gadget Operations */
+/**
+ * The following gadget operations will be implemented in the DWC_otg
+ * PCD. Functions in the API that are not described below are not
+ * implemented.
+ *
+ * The Gadget API provides wrapper functions for each of the function
+ * pointers defined in usb_gadget_ops. The Gadget Driver calls the
+ * wrapper function, which then calls the underlying PCD function. The
+ * following sections are named according to the wrapper functions
+ * (except for ioctl, which doesn't have a wrapper function). Within
+ * each section, the corresponding DWC_otg PCD function name is
+ * specified.
+ *
+ */
+
+/**
+ *Gets the USB Frame number of the last SOF.
+ */
+static int get_frame_number(struct usb_gadget *gadget)
+{
+       struct gadget_wrapper *d;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, gadget);
+
+       if (gadget == 0) {
+               return -ENODEV;
+       }
+
+       d = container_of(gadget, struct gadget_wrapper, gadget);
+       return dwc_otg_pcd_get_frame_number(d->pcd);
+}
+
+#ifdef CONFIG_USB_DWC_OTG_LPM
+static int test_lpm_enabled(struct usb_gadget *gadget)
+{
+       struct gadget_wrapper *d;
+
+       d = container_of(gadget, struct gadget_wrapper, gadget);
+
+       return dwc_otg_pcd_is_lpm_enabled(d->pcd);
+}
+#endif
+
+/**
+ * Initiates Session Request Protocol (SRP) to wakeup the host if no
+ * session is in progress. If a session is already in progress, but
+ * the device is suspended, remote wakeup signaling is started.
+ *
+ */
+static int wakeup(struct usb_gadget *gadget)
+{
+       struct gadget_wrapper *d;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, gadget);
+
+       if (gadget == 0) {
+               return -ENODEV;
+       } else {
+               d = container_of(gadget, struct gadget_wrapper, gadget);
+       }
+       dwc_otg_pcd_wakeup(d->pcd);
+       return 0;
+}
+
+static const struct usb_gadget_ops dwc_otg_pcd_ops = {
+       .get_frame = get_frame_number,
+       .wakeup = wakeup,
+#ifdef CONFIG_USB_DWC_OTG_LPM
+       .lpm_support = test_lpm_enabled,
+#endif
+       // current versions must always be self-powered
+};
+
+static int _setup(dwc_otg_pcd_t * pcd, uint8_t * bytes)
+{
+       int retval = -DWC_E_NOT_SUPPORTED;
+       if (gadget_wrapper->driver && gadget_wrapper->driver->setup) {
+               retval = gadget_wrapper->driver->setup(&gadget_wrapper->gadget,
+                                                      (struct usb_ctrlrequest
+                                                       *)bytes);
+       }
+
+       if (retval == -ENOTSUPP) {
+               retval = -DWC_E_NOT_SUPPORTED;
+       } else if (retval < 0) {
+               retval = -DWC_E_INVALID;
+       }
+
+       return retval;
+}
+
+#ifdef DWC_EN_ISOC
+static int _isoc_complete(dwc_otg_pcd_t * pcd, void *ep_handle,
+                         void *req_handle, int proc_buf_num)
+{
+       int i, packet_count;
+       struct usb_gadget_iso_packet_descriptor *iso_packet = 0;
+       struct usb_iso_request *iso_req = req_handle;
+
+       if (proc_buf_num) {
+               iso_packet = iso_req->iso_packet_desc1;
+       } else {
+               iso_packet = iso_req->iso_packet_desc0;
+       }
+       packet_count =
+           dwc_otg_pcd_get_iso_packet_count(pcd, ep_handle, req_handle);
+       for (i = 0; i < packet_count; ++i) {
+               int status;
+               int actual;
+               int offset;
+               dwc_otg_pcd_get_iso_packet_params(pcd, ep_handle, req_handle,
+                                                 i, &status, &actual, &offset);
+               switch (status) {
+               case -DWC_E_NO_DATA:
+                       status = -ENODATA;
+                       break;
+               default:
+                       if (status) {
+                               DWC_PRINTF("unknown status in isoc packet\n");
+                       }
+
+               }
+               iso_packet[i].status = status;
+               iso_packet[i].offset = offset;
+               iso_packet[i].actual_length = actual;
+       }
+
+       iso_req->status = 0;
+       iso_req->process_buffer(ep_handle, iso_req);
+
+       return 0;
+}
+#endif /* DWC_EN_ISOC */
+
+#ifdef DWC_UTE_PER_IO
+/**
+ * Copy the contents of the extended request to the Linux usb_request's
+ * extended part and call the gadget's completion.
+ *
+ * @param pcd                  Pointer to the pcd structure
+ * @param ep_handle            Void pointer to the usb_ep structure
+ * @param req_handle   Void pointer to the usb_request structure
+ * @param status               Request status returned from the portable logic
+ * @param ereq_port            Void pointer to the extended request structure
+ *                                             created in the the portable part that contains the
+ *                                             results of the processed iso packets.
+ */
+static int _xisoc_complete(dwc_otg_pcd_t * pcd, void *ep_handle,
+                          void *req_handle, int32_t status, void *ereq_port)
+{
+       struct dwc_ute_iso_req_ext *ereqorg = NULL;
+       struct dwc_iso_xreq_port *ereqport = NULL;
+       struct dwc_ute_iso_packet_descriptor *desc_org = NULL;
+       int i;
+       struct usb_request *req;
+       //struct dwc_ute_iso_packet_descriptor *
+       //int status = 0;
+
+       req = (struct usb_request *)req_handle;
+       ereqorg = &req->ext_req;
+       ereqport = (struct dwc_iso_xreq_port *)ereq_port;
+       desc_org = ereqorg->per_io_frame_descs;
+
+       if (req && req->complete) {
+               /* Copy the request data from the portable logic to our request */
+               for (i = 0; i < ereqport->pio_pkt_count; i++) {
+                       desc_org[i].actual_length =
+                           ereqport->per_io_frame_descs[i].actual_length;
+                       desc_org[i].status =
+                           ereqport->per_io_frame_descs[i].status;
+               }
+
+               switch (status) {
+               case -DWC_E_SHUTDOWN:
+                       req->status = -ESHUTDOWN;
+                       break;
+               case -DWC_E_RESTART:
+                       req->status = -ECONNRESET;
+                       break;
+               case -DWC_E_INVALID:
+                       req->status = -EINVAL;
+                       break;
+               case -DWC_E_TIMEOUT:
+                       req->status = -ETIMEDOUT;
+                       break;
+               default:
+                       req->status = status;
+               }
+
+               /* And call the gadget's completion */
+               req->complete(ep_handle, req);
+       }
+
+       return 0;
+}
+#endif /* DWC_UTE_PER_IO */
+
+static int _complete(dwc_otg_pcd_t * pcd, void *ep_handle,
+                    void *req_handle, int32_t status, uint32_t actual)
+{
+       struct usb_request *req = (struct usb_request *)req_handle;
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,27)
+       struct dwc_otg_pcd_ep *ep = NULL;
+#endif
+
+       if (req && req->complete) {
+               switch (status) {
+               case -DWC_E_SHUTDOWN:
+                       req->status = -ESHUTDOWN;
+                       break;
+               case -DWC_E_RESTART:
+                       req->status = -ECONNRESET;
+                       break;
+               case -DWC_E_INVALID:
+                       req->status = -EINVAL;
+                       break;
+               case -DWC_E_TIMEOUT:
+                       req->status = -ETIMEDOUT;
+                       break;
+               default:
+                       req->status = status;
+
+               }
+
+               req->actual = actual;
+               DWC_SPINUNLOCK(pcd->lock);
+               req->complete(ep_handle, req);
+               DWC_SPINLOCK(pcd->lock);
+       }
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,27)
+       ep = ep_from_handle(pcd, ep_handle);
+       if (GET_CORE_IF(pcd)->dma_enable) {
+                if (req->length != 0) {
+                        dwc_otg_device_t *otg_dev = gadget_wrapper->pcd->otg_dev;
+                        struct device *dev = NULL;
+
+                        if (otg_dev != NULL)
+                                  dev = DWC_OTG_OS_GETDEV(otg_dev->os_dep);
+
+                       dma_unmap_single(dev, req->dma, req->length,
+                                         ep->dwc_ep.is_in ?
+                                                DMA_TO_DEVICE: DMA_FROM_DEVICE);
+                }
+       }
+#endif
+
+       return 0;
+}
+
+static int _connect(dwc_otg_pcd_t * pcd, int speed)
+{
+       gadget_wrapper->gadget.speed = speed;
+       return 0;
+}
+
+static int _disconnect(dwc_otg_pcd_t * pcd)
+{
+       if (gadget_wrapper->driver && gadget_wrapper->driver->disconnect) {
+               gadget_wrapper->driver->disconnect(&gadget_wrapper->gadget);
+       }
+       return 0;
+}
+
+static int _resume(dwc_otg_pcd_t * pcd)
+{
+       if (gadget_wrapper->driver && gadget_wrapper->driver->resume) {
+               gadget_wrapper->driver->resume(&gadget_wrapper->gadget);
+       }
+
+       return 0;
+}
+
+static int _suspend(dwc_otg_pcd_t * pcd)
+{
+       if (gadget_wrapper->driver && gadget_wrapper->driver->suspend) {
+               gadget_wrapper->driver->suspend(&gadget_wrapper->gadget);
+       }
+       return 0;
+}
+
+/**
+ * This function updates the otg values in the gadget structure.
+ */
+static int _hnp_changed(dwc_otg_pcd_t * pcd)
+{
+
+       if (!gadget_wrapper->gadget.is_otg)
+               return 0;
+
+       gadget_wrapper->gadget.b_hnp_enable = get_b_hnp_enable(pcd);
+       gadget_wrapper->gadget.a_hnp_support = get_a_hnp_support(pcd);
+       gadget_wrapper->gadget.a_alt_hnp_support = get_a_alt_hnp_support(pcd);
+       return 0;
+}
+
+static int _reset(dwc_otg_pcd_t * pcd)
+{
+       return 0;
+}
+
+#ifdef DWC_UTE_CFI
+static int _cfi_setup(dwc_otg_pcd_t * pcd, void *cfi_req)
+{
+       int retval = -DWC_E_INVALID;
+       if (gadget_wrapper->driver->cfi_feature_setup) {
+               retval =
+                   gadget_wrapper->driver->
+                   cfi_feature_setup(&gadget_wrapper->gadget,
+                                     (struct cfi_usb_ctrlrequest *)cfi_req);
+       }
+
+       return retval;
+}
+#endif
+
+static const struct dwc_otg_pcd_function_ops fops = {
+       .complete = _complete,
+#ifdef DWC_EN_ISOC
+       .isoc_complete = _isoc_complete,
+#endif
+       .setup = _setup,
+       .disconnect = _disconnect,
+       .connect = _connect,
+       .resume = _resume,
+       .suspend = _suspend,
+       .hnp_changed = _hnp_changed,
+       .reset = _reset,
+#ifdef DWC_UTE_CFI
+       .cfi_setup = _cfi_setup,
+#endif
+#ifdef DWC_UTE_PER_IO
+       .xisoc_complete = _xisoc_complete,
+#endif
+};
+
+/**
+ * This function is the top level PCD interrupt handler.
+ */
+static irqreturn_t dwc_otg_pcd_irq(int irq, void *dev)
+{
+       dwc_otg_pcd_t *pcd = dev;
+       int32_t retval = IRQ_NONE;
+
+       retval = dwc_otg_pcd_handle_intr(pcd);
+       if (retval != 0) {
+               S3C2410X_CLEAR_EINTPEND();
+       }
+       return IRQ_RETVAL(retval);
+}
+
+/**
+ * This function initialized the usb_ep structures to there default
+ * state.
+ *
+ * @param d Pointer on gadget_wrapper.
+ */
+void gadget_add_eps(struct gadget_wrapper *d)
+{
+       static const char *names[] = {
+
+               "ep0",
+               "ep1in",
+               "ep2in",
+               "ep3in",
+               "ep4in",
+               "ep5in",
+               "ep6in",
+               "ep7in",
+               "ep8in",
+               "ep9in",
+               "ep10in",
+               "ep11in",
+               "ep12in",
+               "ep13in",
+               "ep14in",
+               "ep15in",
+               "ep1out",
+               "ep2out",
+               "ep3out",
+               "ep4out",
+               "ep5out",
+               "ep6out",
+               "ep7out",
+               "ep8out",
+               "ep9out",
+               "ep10out",
+               "ep11out",
+               "ep12out",
+               "ep13out",
+               "ep14out",
+               "ep15out"
+       };
+
+       int i;
+       struct usb_ep *ep;
+       int8_t dev_endpoints;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s\n", __func__);
+
+       INIT_LIST_HEAD(&d->gadget.ep_list);
+       d->gadget.ep0 = &d->ep0;
+       d->gadget.speed = USB_SPEED_UNKNOWN;
+
+       INIT_LIST_HEAD(&d->gadget.ep0->ep_list);
+
+       /**
+        * Initialize the EP0 structure.
+        */
+       ep = &d->ep0;
+
+       /* Init the usb_ep structure. */
+       ep->name = names[0];
+       ep->ops = (struct usb_ep_ops *)&dwc_otg_pcd_ep_ops;
+
+       /**
+        * @todo NGS: What should the max packet size be set to
+        * here?  Before EP type is set?
+        */
+       ep->maxpacket = MAX_PACKET_SIZE;
+       dwc_otg_pcd_ep_enable(d->pcd, NULL, ep);
+
+       list_add_tail(&ep->ep_list, &d->gadget.ep_list);
+
+       /**
+        * Initialize the EP structures.
+        */
+       dev_endpoints = d->pcd->core_if->dev_if->num_in_eps;
+
+       for (i = 0; i < dev_endpoints; i++) {
+               ep = &d->in_ep[i];
+
+               /* Init the usb_ep structure. */
+               ep->name = names[d->pcd->in_ep[i].dwc_ep.num];
+               ep->ops = (struct usb_ep_ops *)&dwc_otg_pcd_ep_ops;
+
+               /**
+                * @todo NGS: What should the max packet size be set to
+                * here?  Before EP type is set?
+                */
+               ep->maxpacket = MAX_PACKET_SIZE;
+               list_add_tail(&ep->ep_list, &d->gadget.ep_list);
+       }
+
+       dev_endpoints = d->pcd->core_if->dev_if->num_out_eps;
+
+       for (i = 0; i < dev_endpoints; i++) {
+               ep = &d->out_ep[i];
+
+               /* Init the usb_ep structure. */
+               ep->name = names[15 + d->pcd->out_ep[i].dwc_ep.num];
+               ep->ops = (struct usb_ep_ops *)&dwc_otg_pcd_ep_ops;
+
+               /**
+                * @todo NGS: What should the max packet size be set to
+                * here?  Before EP type is set?
+                */
+               ep->maxpacket = MAX_PACKET_SIZE;
+
+               list_add_tail(&ep->ep_list, &d->gadget.ep_list);
+       }
+
+       /* remove ep0 from the list.  There is a ep0 pointer. */
+       list_del_init(&d->ep0.ep_list);
+
+       d->ep0.maxpacket = MAX_EP0_SIZE;
+}
+
+/**
+ * This function releases the Gadget device.
+ * required by device_unregister().
+ *
+ * @todo Should this do something?     Should it free the PCD?
+ */
+static void dwc_otg_pcd_gadget_release(struct device *dev)
+{
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, dev);
+}
+
+static struct gadget_wrapper *alloc_wrapper(dwc_bus_dev_t *_dev)
+{
+       static char pcd_name[] = "dwc_otg_pcd";
+       dwc_otg_device_t *otg_dev = DWC_OTG_BUSDRVDATA(_dev);
+       struct gadget_wrapper *d;
+       int retval;
+
+       d = DWC_ALLOC(sizeof(*d));
+       if (d == NULL) {
+               return NULL;
+       }
+
+       memset(d, 0, sizeof(*d));
+
+       d->gadget.name = pcd_name;
+       d->pcd = otg_dev->pcd;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
+       strcpy(d->gadget.dev.bus_id, "gadget");
+#else
+       dev_set_name(&d->gadget.dev, "%s", "gadget");
+#endif
+
+       d->gadget.dev.parent = &_dev->dev;
+       d->gadget.dev.release = dwc_otg_pcd_gadget_release;
+       d->gadget.ops = &dwc_otg_pcd_ops;
+       d->gadget.max_speed = dwc_otg_pcd_is_dualspeed(otg_dev->pcd) ? USB_SPEED_HIGH:USB_SPEED_FULL;
+       d->gadget.is_otg = dwc_otg_pcd_is_otg(otg_dev->pcd);
+
+       d->driver = 0;
+       /* Register the gadget device */
+       retval = device_register(&d->gadget.dev);
+       if (retval != 0) {
+               DWC_ERROR("device_register failed\n");
+               DWC_FREE(d);
+               return NULL;
+       }
+
+       return d;
+}
+
+static void free_wrapper(struct gadget_wrapper *d)
+{
+       if (d->driver) {
+               /* should have been done already by driver model core */
+               DWC_WARN("driver '%s' is still registered\n",
+                        d->driver->driver.name);
+#ifdef CONFIG_USB_GADGET
+               usb_gadget_unregister_driver(d->driver);
+#endif
+       }
+
+       device_unregister(&d->gadget.dev);
+       DWC_FREE(d);
+}
+
+/**
+ * This function initialized the PCD portion of the driver.
+ *
+ */
+int pcd_init(dwc_bus_dev_t *_dev)
+{
+       dwc_otg_device_t *otg_dev = DWC_OTG_BUSDRVDATA(_dev);
+       int retval = 0;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p) otg_dev=%p\n", __func__, _dev, otg_dev);
+
+       otg_dev->pcd = dwc_otg_pcd_init(otg_dev);
+
+       if (!otg_dev->pcd) {
+               DWC_ERROR("dwc_otg_pcd_init failed\n");
+               return -ENOMEM;
+       }
+
+       otg_dev->pcd->otg_dev = otg_dev;
+       gadget_wrapper = alloc_wrapper(_dev);
+
+       /*
+        * Initialize EP structures
+        */
+       gadget_add_eps(gadget_wrapper);
+       /*
+        * Setup interupt handler
+        */
+       DWC_DEBUGPL(DBG_ANY, "registering handler for irq%d\n",
+                    otg_dev->os_dep.irq_num);
+       retval = request_irq(otg_dev->os_dep.irq_num, dwc_otg_pcd_irq,
+                            IRQF_SHARED, gadget_wrapper->gadget.name,
+                            otg_dev->pcd);
+       if (retval != 0) {
+               DWC_ERROR("request of irq%d failed\n", otg_dev->os_dep.irq_num);
+               free_wrapper(gadget_wrapper);
+               return -EBUSY;
+       }
+
+       dwc_otg_pcd_start(gadget_wrapper->pcd, &fops);
+
+       return retval;
+}
+
+/**
+ * Cleanup the PCD.
+ */
+void pcd_remove(dwc_bus_dev_t *_dev)
+{
+       dwc_otg_device_t *otg_dev = DWC_OTG_BUSDRVDATA(_dev);
+       dwc_otg_pcd_t *pcd = otg_dev->pcd;
+
+       DWC_DEBUGPL(DBG_PCDV, "%s(%p) otg_dev %p\n", __func__, _dev, otg_dev);
+
+       /*
+        * Free the IRQ
+        */
+       free_irq(otg_dev->os_dep.irq_num, pcd);
+       dwc_otg_pcd_remove(otg_dev->pcd);
+       free_wrapper(gadget_wrapper);
+       otg_dev->pcd = 0;
+}
+
+#endif /* DWC_HOST_ONLY */
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/dwc_otg_regs.h
@@ -0,0 +1,2550 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_regs.h $
+ * $Revision: #98 $
+ * $Date: 2012/08/10 $
+ * $Change: 2047372 $
+ *
+ * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
+ * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
+ * otherwise expressly agreed to in writing between Synopsys and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product under
+ * any End User Software License Agreement or Agreement for Licensed Product
+ * with Synopsys or any supplement thereto. You are permitted to use and
+ * redistribute this Software in source and binary forms, with or without
+ * modification, provided that redistributions of source code must retain this
+ * notice. You may not view, use, disclose, copy or distribute this file or
+ * any information contained herein except pursuant to this license grant from
+ * Synopsys. If you do not agree with this notice, including the disclaimer
+ * below, then you are not authorized to use the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * ========================================================================== */
+
+#ifndef __DWC_OTG_REGS_H__
+#define __DWC_OTG_REGS_H__
+
+#include "dwc_otg_core_if.h"
+
+/**
+ * @file
+ *
+ * This file contains the data structures for accessing the DWC_otg core registers.
+ *
+ * The application interfaces with the HS OTG core by reading from and
+ * writing to the Control and Status Register (CSR) space through the
+ * AHB Slave interface. These registers are 32 bits wide, and the
+ * addresses are 32-bit-block aligned.
+ * CSRs are classified as follows:
+ * - Core Global Registers
+ * - Device Mode Registers
+ * - Device Global Registers
+ * - Device Endpoint Specific Registers
+ * - Host Mode Registers
+ * - Host Global Registers
+ * - Host Port CSRs
+ * - Host Channel Specific Registers
+ *
+ * Only the Core Global registers can be accessed in both Device and
+ * Host modes. When the HS OTG core is operating in one mode, either
+ * Device or Host, the application must not access registers from the
+ * other mode. When the core switches from one mode to another, the
+ * registers in the new mode of operation must be reprogrammed as they
+ * would be after a power-on reset.
+ */
+
+/****************************************************************************/
+/** DWC_otg Core registers .
+ * The dwc_otg_core_global_regs structure defines the size
+ * and relative field offsets for the Core Global registers.
+ */
+typedef struct dwc_otg_core_global_regs {
+       /** OTG Control and Status Register.  <i>Offset: 000h</i> */
+       volatile uint32_t gotgctl;
+       /** OTG Interrupt Register.      <i>Offset: 004h</i> */
+       volatile uint32_t gotgint;
+       /**Core AHB Configuration Register.      <i>Offset: 008h</i> */
+       volatile uint32_t gahbcfg;
+
+#define DWC_GLBINTRMASK                0x0001
+#define DWC_DMAENABLE          0x0020
+#define DWC_NPTXEMPTYLVL_EMPTY 0x0080
+#define DWC_NPTXEMPTYLVL_HALFEMPTY     0x0000
+#define DWC_PTXEMPTYLVL_EMPTY  0x0100
+#define DWC_PTXEMPTYLVL_HALFEMPTY      0x0000
+
+       /**Core USB Configuration Register.      <i>Offset: 00Ch</i> */
+       volatile uint32_t gusbcfg;
+       /**Core Reset Register.  <i>Offset: 010h</i> */
+       volatile uint32_t grstctl;
+       /**Core Interrupt Register.      <i>Offset: 014h</i> */
+       volatile uint32_t gintsts;
+       /**Core Interrupt Mask Register.  <i>Offset: 018h</i> */
+       volatile uint32_t gintmsk;
+       /**Receive Status Queue Read Register (Read Only).      <i>Offset: 01Ch</i> */
+       volatile uint32_t grxstsr;
+       /**Receive Status Queue Read & POP Register (Read Only).  <i>Offset: 020h</i>*/
+       volatile uint32_t grxstsp;
+       /**Receive FIFO Size Register.  <i>Offset: 024h</i> */
+       volatile uint32_t grxfsiz;
+       /**Non Periodic Transmit FIFO Size Register.  <i>Offset: 028h</i> */
+       volatile uint32_t gnptxfsiz;
+       /**Non Periodic Transmit FIFO/Queue Status Register (Read
+        * Only). <i>Offset: 02Ch</i> */
+       volatile uint32_t gnptxsts;
+       /**I2C Access Register.  <i>Offset: 030h</i> */
+       volatile uint32_t gi2cctl;
+       /**PHY Vendor Control Register.  <i>Offset: 034h</i> */
+       volatile uint32_t gpvndctl;
+       /**General Purpose Input/Output Register.  <i>Offset: 038h</i> */
+       volatile uint32_t ggpio;
+       /**User ID Register.  <i>Offset: 03Ch</i> */
+       volatile uint32_t guid;
+       /**Synopsys ID Register (Read Only).  <i>Offset: 040h</i> */
+       volatile uint32_t gsnpsid;
+       /**User HW Config1 Register (Read Only).  <i>Offset: 044h</i> */
+       volatile uint32_t ghwcfg1;
+       /**User HW Config2 Register (Read Only).  <i>Offset: 048h</i> */
+       volatile uint32_t ghwcfg2;
+#define DWC_SLAVE_ONLY_ARCH 0
+#define DWC_EXT_DMA_ARCH 1
+#define DWC_INT_DMA_ARCH 2
+
+#define DWC_MODE_HNP_SRP_CAPABLE       0
+#define DWC_MODE_SRP_ONLY_CAPABLE      1
+#define DWC_MODE_NO_HNP_SRP_CAPABLE            2
+#define DWC_MODE_SRP_CAPABLE_DEVICE            3
+#define DWC_MODE_NO_SRP_CAPABLE_DEVICE 4
+#define DWC_MODE_SRP_CAPABLE_HOST      5
+#define DWC_MODE_NO_SRP_CAPABLE_HOST   6
+
+       /**User HW Config3 Register (Read Only).  <i>Offset: 04Ch</i> */
+       volatile uint32_t ghwcfg3;
+       /**User HW Config4 Register (Read Only).  <i>Offset: 050h</i>*/
+       volatile uint32_t ghwcfg4;
+       /** Core LPM Configuration register <i>Offset: 054h</i>*/
+       volatile uint32_t glpmcfg;
+       /** Global PowerDn Register <i>Offset: 058h</i> */
+       volatile uint32_t gpwrdn;
+       /** Global DFIFO SW Config Register  <i>Offset: 05Ch</i> */
+       volatile uint32_t gdfifocfg;
+       /** ADP Control Register  <i>Offset: 060h</i> */
+       volatile uint32_t adpctl;
+       /** Reserved  <i>Offset: 064h-0FFh</i> */
+       volatile uint32_t reserved39[39];
+       /** Host Periodic Transmit FIFO Size Register. <i>Offset: 100h</i> */
+       volatile uint32_t hptxfsiz;
+       /** Device Periodic Transmit FIFO#n Register if dedicated fifos are disabled,
+               otherwise Device Transmit FIFO#n Register.
+        * <i>Offset: 104h + (FIFO_Number-1)*04h, 1 <= FIFO Number <= 15 (1<=n<=15).</i> */
+       volatile uint32_t dtxfsiz[15];
+} dwc_otg_core_global_regs_t;
+
+/**
+ * This union represents the bit fields of the Core OTG Control
+ * and Status Register (GOTGCTL).  Set the bits using the bit
+ * fields then write the <i>d32</i> value to the register.
+ */
+typedef union gotgctl_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned sesreqscs:1;
+               unsigned sesreq:1;
+               unsigned vbvalidoven:1;
+               unsigned vbvalidovval:1;
+               unsigned avalidoven:1;
+               unsigned avalidovval:1;
+               unsigned bvalidoven:1;
+               unsigned bvalidovval:1;
+               unsigned hstnegscs:1;
+               unsigned hnpreq:1;
+               unsigned hstsethnpen:1;
+               unsigned devhnpen:1;
+               unsigned reserved12_15:4;
+               unsigned conidsts:1;
+               unsigned dbnctime:1;
+               unsigned asesvld:1;
+               unsigned bsesvld:1;
+               unsigned otgver:1;
+               unsigned reserved1:1;
+               unsigned multvalidbc:5;
+               unsigned chirpen:1;
+               unsigned reserved28_31:4;
+       } b;
+} gotgctl_data_t;
+
+/**
+ * This union represents the bit fields of the Core OTG Interrupt Register
+ * (GOTGINT).  Set/clear the bits using the bit fields then write the <i>d32</i>
+ * value to the register.
+ */
+typedef union gotgint_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Current Mode */
+               unsigned reserved0_1:2;
+
+               /** Session End Detected */
+               unsigned sesenddet:1;
+
+               unsigned reserved3_7:5;
+
+               /** Session Request Success Status Change */
+               unsigned sesreqsucstschng:1;
+               /** Host Negotiation Success Status Change */
+               unsigned hstnegsucstschng:1;
+
+               unsigned reserved10_16:7;
+
+               /** Host Negotiation Detected */
+               unsigned hstnegdet:1;
+               /** A-Device Timeout Change */
+               unsigned adevtoutchng:1;
+               /** Debounce Done */
+               unsigned debdone:1;
+               /** Multi-Valued input changed */
+               unsigned mvic:1;
+
+               unsigned reserved31_21:11;
+
+       } b;
+} gotgint_data_t;
+
+/**
+ * This union represents the bit fields of the Core AHB Configuration
+ * Register (GAHBCFG). Set/clear the bits using the bit fields then
+ * write the <i>d32</i> value to the register.
+ */
+typedef union gahbcfg_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned glblintrmsk:1;
+#define DWC_GAHBCFG_GLBINT_ENABLE              1
+
+               unsigned hburstlen:4;
+#define DWC_GAHBCFG_INT_DMA_BURST_SINGLE       0
+#define DWC_GAHBCFG_INT_DMA_BURST_INCR         1
+#define DWC_GAHBCFG_INT_DMA_BURST_INCR4                3
+#define DWC_GAHBCFG_INT_DMA_BURST_INCR8                5
+#define DWC_GAHBCFG_INT_DMA_BURST_INCR16       7
+
+               unsigned dmaenable:1;
+#define DWC_GAHBCFG_DMAENABLE                  1
+               unsigned reserved:1;
+               unsigned nptxfemplvl_txfemplvl:1;
+               unsigned ptxfemplvl:1;
+#define DWC_GAHBCFG_TXFEMPTYLVL_EMPTY          1
+#define DWC_GAHBCFG_TXFEMPTYLVL_HALFEMPTY      0
+               unsigned reserved9_20:12;
+               unsigned remmemsupp:1;
+               unsigned notialldmawrit:1;
+               unsigned ahbsingle:1;
+               unsigned reserved24_31:8;
+       } b;
+} gahbcfg_data_t;
+
+/**
+ * This union represents the bit fields of the Core USB Configuration
+ * Register (GUSBCFG). Set the bits using the bit fields then write
+ * the <i>d32</i> value to the register.
+ */
+typedef union gusbcfg_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned toutcal:3;
+               unsigned phyif:1;
+               unsigned ulpi_utmi_sel:1;
+               unsigned fsintf:1;
+               unsigned physel:1;
+               unsigned ddrsel:1;
+               unsigned srpcap:1;
+               unsigned hnpcap:1;
+               unsigned usbtrdtim:4;
+               unsigned reserved1:1;
+               unsigned phylpwrclksel:1;
+               unsigned otgutmifssel:1;
+               unsigned ulpi_fsls:1;
+               unsigned ulpi_auto_res:1;
+               unsigned ulpi_clk_sus_m:1;
+               unsigned ulpi_ext_vbus_drv:1;
+               unsigned ulpi_int_vbus_indicator:1;
+               unsigned term_sel_dl_pulse:1;
+               unsigned indicator_complement:1;
+               unsigned indicator_pass_through:1;
+               unsigned ulpi_int_prot_dis:1;
+               unsigned ic_usb_cap:1;
+               unsigned ic_traffic_pull_remove:1;
+               unsigned tx_end_delay:1;
+               unsigned force_host_mode:1;
+               unsigned force_dev_mode:1;
+               unsigned reserved31:1;
+       } b;
+} gusbcfg_data_t;
+
+/**
+ * This union represents the bit fields of the Core Reset Register
+ * (GRSTCTL).  Set/clear the bits using the bit fields then write the
+ * <i>d32</i> value to the register.
+ */
+typedef union grstctl_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Core Soft Reset (CSftRst) (Device and Host)
+                *
+                * The application can flush the control logic in the
+                * entire core using this bit. This bit resets the
+                * pipelines in the AHB Clock domain as well as the
+                * PHY Clock domain.
+                *
+                * The state machines are reset to an IDLE state, the
+                * control bits in the CSRs are cleared, all the
+                * transmit FIFOs and the receive FIFO are flushed.
+                *
+                * The status mask bits that control the generation of
+                * the interrupt, are cleared, to clear the
+                * interrupt. The interrupt status bits are not
+                * cleared, so the application can get the status of
+                * any events that occurred in the core after it has
+                * set this bit.
+                *
+                * Any transactions on the AHB are terminated as soon
+                * as possible following the protocol. Any
+                * transactions on the USB are terminated immediately.
+                *
+                * The configuration settings in the CSRs are
+                * unchanged, so the software doesn't have to
+                * reprogram these registers (Device
+                * Configuration/Host Configuration/Core System
+                * Configuration/Core PHY Configuration).
+                *
+                * The application can write to this bit, any time it
+                * wants to reset the core. This is a self clearing
+                * bit and the core clears this bit after all the
+                * necessary logic is reset in the core, which may
+                * take several clocks, depending on the current state
+                * of the core.
+                */
+               unsigned csftrst:1;
+               /** Hclk Soft Reset
+                *
+                * The application uses this bit to reset the control logic in
+                * the AHB clock domain. Only AHB clock domain pipelines are
+                * reset.
+                */
+               unsigned hsftrst:1;
+               /** Host Frame Counter Reset (Host Only)<br>
+                *
+                * The application can reset the (micro)frame number
+                * counter inside the core, using this bit. When the
+                * (micro)frame counter is reset, the subsequent SOF
+                * sent out by the core, will have a (micro)frame
+                * number of 0.
+                */
+               unsigned hstfrm:1;
+               /** In Token Sequence Learning Queue Flush
+                * (INTknQFlsh) (Device Only)
+                */
+               unsigned intknqflsh:1;
+               /** RxFIFO Flush (RxFFlsh) (Device and Host)
+                *
+                * The application can flush the entire Receive FIFO
+                * using this bit. The application must first
+                * ensure that the core is not in the middle of a
+                * transaction. The application should write into
+                * this bit, only after making sure that neither the
+                * DMA engine is reading from the RxFIFO nor the MAC
+                * is writing the data in to the FIFO. The
+                * application should wait until the bit is cleared
+                * before performing any other operations. This bit
+                * will takes 8 clocks (slowest of PHY or AHB clock)
+                * to clear.
+                */
+               unsigned rxfflsh:1;
+               /** TxFIFO Flush (TxFFlsh) (Device and Host).
+                *
+                * This bit is used to selectively flush a single or
+                * all transmit FIFOs. The application must first
+                * ensure that the core is not in the middle of a
+                * transaction. The application should write into
+                * this bit, only after making sure that neither the
+                * DMA engine is writing into the TxFIFO nor the MAC
+                * is reading the data out of the FIFO. The
+                * application should wait until the core clears this
+                * bit, before performing any operations. This bit
+                * will takes 8 clocks (slowest of PHY or AHB clock)
+                * to clear.
+                */
+               unsigned txfflsh:1;
+
+               /** TxFIFO Number (TxFNum) (Device and Host).
+                *
+                * This is the FIFO number which needs to be flushed,
+                * using the TxFIFO Flush bit. This field should not
+                * be changed until the TxFIFO Flush bit is cleared by
+                * the core.
+                *       - 0x0 : Non Periodic TxFIFO Flush
+                *       - 0x1 : Periodic TxFIFO #1 Flush in device mode
+                *         or Periodic TxFIFO in host mode
+                *       - 0x2 : Periodic TxFIFO #2 Flush in device mode.
+                *       - ...
+                *       - 0xF : Periodic TxFIFO #15 Flush in device mode
+                *       - 0x10: Flush all the Transmit NonPeriodic and
+                *         Transmit Periodic FIFOs in the core
+                */
+               unsigned txfnum:5;
+               /** Reserved */
+               unsigned reserved11_29:19;
+               /** DMA Request Signal.  Indicated DMA request is in
+                * probress. Used for debug purpose. */
+               unsigned dmareq:1;
+               /** AHB Master Idle.  Indicates the AHB Master State
+                * Machine is in IDLE condition. */
+               unsigned ahbidle:1;
+       } b;
+} grstctl_t;
+
+/**
+ * This union represents the bit fields of the Core Interrupt Mask
+ * Register (GINTMSK). Set/clear the bits using the bit fields then
+ * write the <i>d32</i> value to the register.
+ */
+typedef union gintmsk_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned reserved0:1;
+               unsigned modemismatch:1;
+               unsigned otgintr:1;
+               unsigned sofintr:1;
+               unsigned rxstsqlvl:1;
+               unsigned nptxfempty:1;
+               unsigned ginnakeff:1;
+               unsigned goutnakeff:1;
+               unsigned ulpickint:1;
+               unsigned i2cintr:1;
+               unsigned erlysuspend:1;
+               unsigned usbsuspend:1;
+               unsigned usbreset:1;
+               unsigned enumdone:1;
+               unsigned isooutdrop:1;
+               unsigned eopframe:1;
+               unsigned restoredone:1;
+               unsigned epmismatch:1;
+               unsigned inepintr:1;
+               unsigned outepintr:1;
+               unsigned incomplisoin:1;
+               unsigned incomplisoout:1;
+               unsigned fetsusp:1;
+               unsigned resetdet:1;
+               unsigned portintr:1;
+               unsigned hcintr:1;
+               unsigned ptxfempty:1;
+               unsigned lpmtranrcvd:1;
+               unsigned conidstschng:1;
+               unsigned disconnect:1;
+               unsigned sessreqintr:1;
+               unsigned wkupintr:1;
+       } b;
+} gintmsk_data_t;
+/**
+ * This union represents the bit fields of the Core Interrupt Register
+ * (GINTSTS).  Set/clear the bits using the bit fields then write the
+ * <i>d32</i> value to the register.
+ */
+typedef union gintsts_data {
+       /** raw register data */
+       uint32_t d32;
+#define DWC_SOF_INTR_MASK 0x0008
+       /** register bits */
+       struct {
+#define DWC_HOST_MODE 1
+               unsigned curmode:1;
+               unsigned modemismatch:1;
+               unsigned otgintr:1;
+               unsigned sofintr:1;
+               unsigned rxstsqlvl:1;
+               unsigned nptxfempty:1;
+               unsigned ginnakeff:1;
+               unsigned goutnakeff:1;
+               unsigned ulpickint:1;
+               unsigned i2cintr:1;
+               unsigned erlysuspend:1;
+               unsigned usbsuspend:1;
+               unsigned usbreset:1;
+               unsigned enumdone:1;
+               unsigned isooutdrop:1;
+               unsigned eopframe:1;
+               unsigned restoredone:1;
+               unsigned epmismatch:1;
+               unsigned inepint:1;
+               unsigned outepintr:1;
+               unsigned incomplisoin:1;
+               unsigned incomplisoout:1;
+               unsigned fetsusp:1;
+               unsigned resetdet:1;
+               unsigned portintr:1;
+               unsigned hcintr:1;
+               unsigned ptxfempty:1;
+               unsigned lpmtranrcvd:1;
+               unsigned conidstschng:1;
+               unsigned disconnect:1;
+               unsigned sessreqintr:1;
+               unsigned wkupintr:1;
+       } b;
+} gintsts_data_t;
+
+/**
+ * This union represents the bit fields in the Device Receive Status Read and
+ * Pop Registers (GRXSTSR, GRXSTSP) Read the register into the <i>d32</i>
+ * element then read out the bits using the <i>b</i>it elements.
+ */
+typedef union device_grxsts_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned epnum:4;
+               unsigned bcnt:11;
+               unsigned dpid:2;
+
+#define DWC_STS_DATA_UPDT              0x2     // OUT Data Packet
+#define DWC_STS_XFER_COMP              0x3     // OUT Data Transfer Complete
+
+#define DWC_DSTS_GOUT_NAK              0x1     // Global OUT NAK
+#define DWC_DSTS_SETUP_COMP            0x4     // Setup Phase Complete
+#define DWC_DSTS_SETUP_UPDT 0x6        // SETUP Packet
+               unsigned pktsts:4;
+               unsigned fn:4;
+               unsigned reserved25_31:7;
+       } b;
+} device_grxsts_data_t;
+
+/**
+ * This union represents the bit fields in the Host Receive Status Read and
+ * Pop Registers (GRXSTSR, GRXSTSP) Read the register into the <i>d32</i>
+ * element then read out the bits using the <i>b</i>it elements.
+ */
+typedef union host_grxsts_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned chnum:4;
+               unsigned bcnt:11;
+               unsigned dpid:2;
+
+               unsigned pktsts:4;
+#define DWC_GRXSTS_PKTSTS_IN                     0x2
+#define DWC_GRXSTS_PKTSTS_IN_XFER_COMP   0x3
+#define DWC_GRXSTS_PKTSTS_DATA_TOGGLE_ERR 0x5
+#define DWC_GRXSTS_PKTSTS_CH_HALTED              0x7
+
+               unsigned reserved21_31:11;
+       } b;
+} host_grxsts_data_t;
+
+/**
+ * This union represents the bit fields in the FIFO Size Registers (HPTXFSIZ,
+ * GNPTXFSIZ, DPTXFSIZn, DIEPTXFn). Read the register into the <i>d32</i> element
+ * then read out the bits using the <i>b</i>it elements.
+ */
+typedef union fifosize_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned startaddr:16;
+               unsigned depth:16;
+       } b;
+} fifosize_data_t;
+
+/**
+ * This union represents the bit fields in the Non-Periodic Transmit
+ * FIFO/Queue Status Register (GNPTXSTS). Read the register into the
+ * <i>d32</i> element then read out the bits using the <i>b</i>it
+ * elements.
+ */
+typedef union gnptxsts_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned nptxfspcavail:16;
+               unsigned nptxqspcavail:8;
+               /** Top of the Non-Periodic Transmit Request Queue
+                *      - bit 24 - Terminate (Last entry for the selected
+                *        channel/EP)
+                *      - bits 26:25 - Token Type
+                *        - 2'b00 - IN/OUT
+                *        - 2'b01 - Zero Length OUT
+                *        - 2'b10 - PING/Complete Split
+                *        - 2'b11 - Channel Halt
+                *      - bits 30:27 - Channel/EP Number
+                */
+               unsigned nptxqtop_terminate:1;
+               unsigned nptxqtop_token:2;
+               unsigned nptxqtop_chnep:4;
+               unsigned reserved:1;
+       } b;
+} gnptxsts_data_t;
+
+/**
+ * This union represents the bit fields in the Transmit
+ * FIFO Status Register (DTXFSTS). Read the register into the
+ * <i>d32</i> element then read out the bits using the <i>b</i>it
+ * elements.
+ */
+typedef union dtxfsts_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned txfspcavail:16;
+               unsigned reserved:16;
+       } b;
+} dtxfsts_data_t;
+
+/**
+ * This union represents the bit fields in the I2C Control Register
+ * (I2CCTL). Read the register into the <i>d32</i> element then read out the
+ * bits using the <i>b</i>it elements.
+ */
+typedef union gi2cctl_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned rwdata:8;
+               unsigned regaddr:8;
+               unsigned addr:7;
+               unsigned i2cen:1;
+               unsigned ack:1;
+               unsigned i2csuspctl:1;
+               unsigned i2cdevaddr:2;
+               unsigned i2cdatse0:1;
+               unsigned reserved:1;
+               unsigned rw:1;
+               unsigned bsydne:1;
+       } b;
+} gi2cctl_data_t;
+
+/**
+ * This union represents the bit fields in the PHY Vendor Control Register
+ * (GPVNDCTL). Read the register into the <i>d32</i> element then read out the
+ * bits using the <i>b</i>it elements.
+ */
+typedef union gpvndctl_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned regdata:8;
+               unsigned vctrl:8;
+               unsigned regaddr16_21:6;
+               unsigned regwr:1;
+               unsigned reserved23_24:2;
+               unsigned newregreq:1;
+               unsigned vstsbsy:1;
+               unsigned vstsdone:1;
+               unsigned reserved28_30:3;
+               unsigned disulpidrvr:1;
+       } b;
+} gpvndctl_data_t;
+
+/**
+ * This union represents the bit fields in the General Purpose
+ * Input/Output Register (GGPIO).
+ * Read the register into the <i>d32</i> element then read out the
+ * bits using the <i>b</i>it elements.
+ */
+typedef union ggpio_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned gpi:16;
+               unsigned gpo:16;
+       } b;
+} ggpio_data_t;
+
+/**
+ * This union represents the bit fields in the User ID Register
+ * (GUID). Read the register into the <i>d32</i> element then read out the
+ * bits using the <i>b</i>it elements.
+ */
+typedef union guid_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned rwdata:32;
+       } b;
+} guid_data_t;
+
+/**
+ * This union represents the bit fields in the Synopsys ID Register
+ * (GSNPSID). Read the register into the <i>d32</i> element then read out the
+ * bits using the <i>b</i>it elements.
+ */
+typedef union gsnpsid_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned rwdata:32;
+       } b;
+} gsnpsid_data_t;
+
+/**
+ * This union represents the bit fields in the User HW Config1
+ * Register.  Read the register into the <i>d32</i> element then read
+ * out the bits using the <i>b</i>it elements.
+ */
+typedef union hwcfg1_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned ep_dir0:2;
+               unsigned ep_dir1:2;
+               unsigned ep_dir2:2;
+               unsigned ep_dir3:2;
+               unsigned ep_dir4:2;
+               unsigned ep_dir5:2;
+               unsigned ep_dir6:2;
+               unsigned ep_dir7:2;
+               unsigned ep_dir8:2;
+               unsigned ep_dir9:2;
+               unsigned ep_dir10:2;
+               unsigned ep_dir11:2;
+               unsigned ep_dir12:2;
+               unsigned ep_dir13:2;
+               unsigned ep_dir14:2;
+               unsigned ep_dir15:2;
+       } b;
+} hwcfg1_data_t;
+
+/**
+ * This union represents the bit fields in the User HW Config2
+ * Register.  Read the register into the <i>d32</i> element then read
+ * out the bits using the <i>b</i>it elements.
+ */
+typedef union hwcfg2_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /* GHWCFG2 */
+               unsigned op_mode:3;
+#define DWC_HWCFG2_OP_MODE_HNP_SRP_CAPABLE_OTG 0
+#define DWC_HWCFG2_OP_MODE_SRP_ONLY_CAPABLE_OTG 1
+#define DWC_HWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE_OTG 2
+#define DWC_HWCFG2_OP_MODE_SRP_CAPABLE_DEVICE 3
+#define DWC_HWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE 4
+#define DWC_HWCFG2_OP_MODE_SRP_CAPABLE_HOST 5
+#define DWC_HWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST 6
+
+               unsigned architecture:2;
+               unsigned point2point:1;
+               unsigned hs_phy_type:2;
+#define DWC_HWCFG2_HS_PHY_TYPE_NOT_SUPPORTED 0
+#define DWC_HWCFG2_HS_PHY_TYPE_UTMI 1
+#define DWC_HWCFG2_HS_PHY_TYPE_ULPI 2
+#define DWC_HWCFG2_HS_PHY_TYPE_UTMI_ULPI 3
+
+               unsigned fs_phy_type:2;
+               unsigned num_dev_ep:4;
+               unsigned num_host_chan:4;
+               unsigned perio_ep_supported:1;
+               unsigned dynamic_fifo:1;
+               unsigned multi_proc_int:1;
+               unsigned reserved21:1;
+               unsigned nonperio_tx_q_depth:2;
+               unsigned host_perio_tx_q_depth:2;
+               unsigned dev_token_q_depth:5;
+               unsigned otg_enable_ic_usb:1;
+       } b;
+} hwcfg2_data_t;
+
+/**
+ * This union represents the bit fields in the User HW Config3
+ * Register.  Read the register into the <i>d32</i> element then read
+ * out the bits using the <i>b</i>it elements.
+ */
+typedef union hwcfg3_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /* GHWCFG3 */
+               unsigned xfer_size_cntr_width:4;
+               unsigned packet_size_cntr_width:3;
+               unsigned otg_func:1;
+               unsigned i2c:1;
+               unsigned vendor_ctrl_if:1;
+               unsigned optional_features:1;
+               unsigned synch_reset_type:1;
+               unsigned adp_supp:1;
+               unsigned otg_enable_hsic:1;
+               unsigned bc_support:1;
+               unsigned otg_lpm_en:1;
+               unsigned dfifo_depth:16;
+       } b;
+} hwcfg3_data_t;
+
+/**
+ * This union represents the bit fields in the User HW Config4
+ * Register.  Read the register into the <i>d32</i> element then read
+ * out the bits using the <i>b</i>it elements.
+ */
+typedef union hwcfg4_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned num_dev_perio_in_ep:4;
+               unsigned power_optimiz:1;
+               unsigned min_ahb_freq:1;
+               unsigned hiber:1;
+               unsigned xhiber:1;
+               unsigned reserved:6;
+               unsigned utmi_phy_data_width:2;
+               unsigned num_dev_mode_ctrl_ep:4;
+               unsigned iddig_filt_en:1;
+               unsigned vbus_valid_filt_en:1;
+               unsigned a_valid_filt_en:1;
+               unsigned b_valid_filt_en:1;
+               unsigned session_end_filt_en:1;
+               unsigned ded_fifo_en:1;
+               unsigned num_in_eps:4;
+               unsigned desc_dma:1;
+               unsigned desc_dma_dyn:1;
+       } b;
+} hwcfg4_data_t;
+
+/**
+ * This union represents the bit fields of the Core LPM Configuration
+ * Register (GLPMCFG). Set the bits using bit fields then write
+ * the <i>d32</i> value to the register.
+ */
+typedef union glpmctl_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** LPM-Capable (LPMCap) (Device and Host)
+                * The application uses this bit to control
+                * the DWC_otg core LPM capabilities.
+                */
+               unsigned lpm_cap_en:1;
+               /** LPM response programmed by application (AppL1Res) (Device)
+                * Handshake response to LPM token pre-programmed
+                * by device application software.
+                */
+               unsigned appl_resp:1;
+               /** Host Initiated Resume Duration (HIRD) (Device and Host)
+                * In Host mode this field indicates the value of HIRD
+                * to be sent in an LPM transaction.
+                * In Device mode this field is updated with the
+                * Received LPM Token HIRD bmAttribute
+                * when an ACK/NYET/STALL response is sent
+                * to an LPM transaction.
+                */
+               unsigned hird:4;
+               /** RemoteWakeEnable (bRemoteWake) (Device and Host)
+                * In Host mode this bit indicates the value of remote
+                * wake up to be sent in wIndex field of LPM transaction.
+                * In Device mode this field is updated with the
+                * Received LPM Token bRemoteWake bmAttribute
+                * when an ACK/NYET/STALL response is sent
+                * to an LPM transaction.
+                */
+               unsigned rem_wkup_en:1;
+               /** Enable utmi_sleep_n (EnblSlpM) (Device and Host)
+                * The application uses this bit to control
+                * the utmi_sleep_n assertion to the PHY when in L1 state.
+                */
+               unsigned en_utmi_sleep:1;
+               /** HIRD Threshold (HIRD_Thres) (Device and Host)
+                */
+               unsigned hird_thres:5;
+               /** LPM Response (CoreL1Res) (Device and Host)
+                * In Host mode this bit contains handsake response to
+                * LPM transaction.
+                * In Device mode the response of the core to
+                * LPM transaction received is reflected in these two bits.
+                       - 0x0 : ERROR (No handshake response)
+                       - 0x1 : STALL
+                       - 0x2 : NYET
+                       - 0x3 : ACK
+                */
+               unsigned lpm_resp:2;
+               /** Port Sleep Status (SlpSts) (Device and Host)
+                * This bit is set as long as a Sleep condition
+                * is present on the USB bus.
+                */
+               unsigned prt_sleep_sts:1;
+               /** Sleep State Resume OK (L1ResumeOK) (Device and Host)
+                * Indicates that the application or host
+                * can start resume from Sleep state.
+                */
+               unsigned sleep_state_resumeok:1;
+               /** LPM channel Index (LPM_Chnl_Indx) (Host)
+                * The channel number on which the LPM transaction
+                * has to be applied while sending
+                * an LPM transaction to the local device.
+                */
+               unsigned lpm_chan_index:4;
+               /** LPM Retry Count (LPM_Retry_Cnt) (Host)
+                * Number host retries that would be performed
+                * if the device response was not valid response.
+                */
+               unsigned retry_count:3;
+               /** Send LPM Transaction (SndLPM) (Host)
+                * When set by application software,
+                * an LPM transaction containing two tokens
+                * is sent.
+                */
+               unsigned send_lpm:1;
+               /** LPM Retry status (LPM_RetryCnt_Sts) (Host)
+                * Number of LPM Host Retries still remaining
+                * to be transmitted for the current LPM sequence
+                */
+               unsigned retry_count_sts:3;
+               unsigned reserved28_29:2;
+               /** In host mode once this bit is set, the host
+                * configures to drive the HSIC Idle state on the bus.
+                * It then waits for the  device to initiate the Connect sequence.
+                * In device mode once this bit is set, the device waits for
+                * the HSIC Idle line state on the bus. Upon receving the Idle
+                * line state, it initiates the HSIC Connect sequence.
+                */
+               unsigned hsic_connect:1;
+               /** This bit overrides and functionally inverts
+                * the if_select_hsic input port signal.
+                */
+               unsigned inv_sel_hsic:1;
+       } b;
+} glpmcfg_data_t;
+
+/**
+ * This union represents the bit fields of the Core ADP Timer, Control and
+ * Status Register (ADPTIMCTLSTS). Set the bits using bit fields then write
+ * the <i>d32</i> value to the register.
+ */
+typedef union adpctl_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Probe Discharge (PRB_DSCHG)
+                *  These bits set the times for TADP_DSCHG.
+                *  These bits are defined as follows:
+                *  2'b00 - 4 msec
+                *  2'b01 - 8 msec
+                *  2'b10 - 16 msec
+                *  2'b11 - 32 msec
+                */
+               unsigned prb_dschg:2;
+               /** Probe Delta (PRB_DELTA)
+                *  These bits set the resolution for RTIM   value.
+                *  The bits are defined in units of 32 kHz clock cycles as follows:
+                *  2'b00  -  1 cycles
+                *  2'b01  -  2 cycles
+                *  2'b10 -  3 cycles
+                *  2'b11 - 4 cycles
+                *  For example if this value is chosen to 2'b01, it means that RTIM
+                *  increments for every 3(three) 32Khz clock cycles.
+                */
+               unsigned prb_delta:2;
+               /** Probe Period (PRB_PER)
+                *  These bits sets the TADP_PRD as shown in Figure 4 as follows:
+                *  2'b00  -  0.625 to 0.925 sec (typical 0.775 sec)
+                *  2'b01  -  1.25 to 1.85 sec (typical 1.55 sec)
+                *  2'b10  -  1.9 to 2.6 sec (typical 2.275 sec)
+                *  2'b11  -  Reserved
+                */
+               unsigned prb_per:2;
+               /** These bits capture the latest time it took for VBUS to ramp from
+                *  VADP_SINK to VADP_PRB.
+                *  0x000  -  1 cycles
+                *  0x001  -  2 cycles
+                *  0x002  -  3 cycles
+                *  etc
+                *  0x7FF  -  2048 cycles
+                *  A time of 1024 cycles at 32 kHz corresponds to a time of 32 msec.
+               */
+               unsigned rtim:11;
+               /** Enable Probe (EnaPrb)
+                *  When programmed to 1'b1, the core performs a probe operation.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned enaprb:1;
+               /** Enable Sense (EnaSns)
+                *  When programmed to 1'b1, the core performs a Sense operation.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned enasns:1;
+               /** ADP Reset (ADPRes)
+                *  When set, ADP controller is reset.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned adpres:1;
+               /** ADP Enable (ADPEn)
+                *  When set, the core performs either ADP probing or sensing
+                *  based on EnaPrb or EnaSns.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned adpen:1;
+               /** ADP Probe Interrupt (ADP_PRB_INT)
+                *  When this bit is set, it means that the VBUS
+                *  voltage is greater than VADP_PRB or VADP_PRB is reached.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned adp_prb_int:1;
+               /**
+                *  ADP Sense Interrupt (ADP_SNS_INT)
+                *  When this bit is set, it means that the VBUS voltage is greater than
+                *  VADP_SNS value or VADP_SNS is reached.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned adp_sns_int:1;
+               /** ADP Tomeout Interrupt (ADP_TMOUT_INT)
+                *  This bit is relevant only for an ADP probe.
+                *  When this bit is set, it means that the ramp time has
+                *  completed ie ADPCTL.RTIM has reached its terminal value
+                *  of 0x7FF.  This is a debug feature that allows software
+                *  to read the ramp time after each cycle.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned adp_tmout_int:1;
+               /** ADP Probe Interrupt Mask (ADP_PRB_INT_MSK)
+                *  When this bit is set, it unmasks the interrupt due to ADP_PRB_INT.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned adp_prb_int_msk:1;
+               /** ADP Sense Interrupt Mask (ADP_SNS_INT_MSK)
+                *  When this bit is set, it unmasks the interrupt due to ADP_SNS_INT.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned adp_sns_int_msk:1;
+               /** ADP Timoeout Interrupt Mask (ADP_TMOUT_MSK)
+                *  When this bit is set, it unmasks the interrupt due to ADP_TMOUT_INT.
+                *  This bit is valid only if OTG_Ver = 1'b1.
+                */
+               unsigned adp_tmout_int_msk:1;
+               /** Access Request
+                * 2'b00 - Read/Write Valid (updated by the core)
+                * 2'b01 - Read
+                * 2'b00 - Write
+                * 2'b00 - Reserved
+                */
+               unsigned ar:2;
+                /** Reserved */
+               unsigned reserved29_31:3;
+       } b;
+} adpctl_data_t;
+
+////////////////////////////////////////////
+// Device Registers
+/**
+ * Device Global Registers. <i>Offsets 800h-BFFh</i>
+ *
+ * The following structures define the size and relative field offsets
+ * for the Device Mode Registers.
+ *
+ * <i>These registers are visible only in Device mode and must not be
+ * accessed in Host mode, as the results are unknown.</i>
+ */
+typedef struct dwc_otg_dev_global_regs {
+       /** Device Configuration Register. <i>Offset 800h</i> */
+       volatile uint32_t dcfg;
+       /** Device Control Register. <i>Offset: 804h</i> */
+       volatile uint32_t dctl;
+       /** Device Status Register (Read Only). <i>Offset: 808h</i> */
+       volatile uint32_t dsts;
+       /** Reserved. <i>Offset: 80Ch</i> */
+       uint32_t unused;
+       /** Device IN Endpoint Common Interrupt Mask
+        * Register. <i>Offset: 810h</i> */
+       volatile uint32_t diepmsk;
+       /** Device OUT Endpoint Common Interrupt Mask
+        * Register. <i>Offset: 814h</i> */
+       volatile uint32_t doepmsk;
+       /** Device All Endpoints Interrupt Register.  <i>Offset: 818h</i> */
+       volatile uint32_t daint;
+       /** Device All Endpoints Interrupt Mask Register.  <i>Offset:
+        * 81Ch</i> */
+       volatile uint32_t daintmsk;
+       /** Device IN Token Queue Read Register-1 (Read Only).
+        * <i>Offset: 820h</i> */
+       volatile uint32_t dtknqr1;
+       /** Device IN Token Queue Read Register-2 (Read Only).
+        * <i>Offset: 824h</i> */
+       volatile uint32_t dtknqr2;
+       /** Device VBUS  discharge Register.  <i>Offset: 828h</i> */
+       volatile uint32_t dvbusdis;
+       /** Device VBUS Pulse Register.  <i>Offset: 82Ch</i> */
+       volatile uint32_t dvbuspulse;
+       /** Device IN Token Queue Read Register-3 (Read Only). /
+        *      Device Thresholding control register (Read/Write)
+        * <i>Offset: 830h</i> */
+       volatile uint32_t dtknqr3_dthrctl;
+       /** Device IN Token Queue Read Register-4 (Read Only). /
+        *      Device IN EPs empty Inr. Mask Register (Read/Write)
+        * <i>Offset: 834h</i> */
+       volatile uint32_t dtknqr4_fifoemptymsk;
+       /** Device Each Endpoint Interrupt Register (Read Only). /
+        * <i>Offset: 838h</i> */
+       volatile uint32_t deachint;
+       /** Device Each Endpoint Interrupt mask Register (Read/Write). /
+        * <i>Offset: 83Ch</i> */
+       volatile uint32_t deachintmsk;
+       /** Device Each In Endpoint Interrupt mask Register (Read/Write). /
+        * <i>Offset: 840h</i> */
+       volatile uint32_t diepeachintmsk[MAX_EPS_CHANNELS];
+       /** Device Each Out Endpoint Interrupt mask Register (Read/Write). /
+        * <i>Offset: 880h</i> */
+       volatile uint32_t doepeachintmsk[MAX_EPS_CHANNELS];
+} dwc_otg_device_global_regs_t;
+
+/**
+ * This union represents the bit fields in the Device Configuration
+ * Register.  Read the register into the <i>d32</i> member then
+ * set/clear the bits using the <i>b</i>it elements.  Write the
+ * <i>d32</i> member to the dcfg register.
+ */
+typedef union dcfg_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Device Speed */
+               unsigned devspd:2;
+               /** Non Zero Length Status OUT Handshake */
+               unsigned nzstsouthshk:1;
+#define DWC_DCFG_SEND_STALL 1
+
+               unsigned ena32khzs:1;
+               /** Device Addresses */
+               unsigned devaddr:7;
+               /** Periodic Frame Interval */
+               unsigned perfrint:2;
+#define DWC_DCFG_FRAME_INTERVAL_80 0
+#define DWC_DCFG_FRAME_INTERVAL_85 1
+#define DWC_DCFG_FRAME_INTERVAL_90 2
+#define DWC_DCFG_FRAME_INTERVAL_95 3
+
+               /** Enable Device OUT NAK for bulk in DDMA mode */
+               unsigned endevoutnak:1;
+
+               unsigned reserved14_17:4;
+               /** In Endpoint Mis-match count */
+               unsigned epmscnt:5;
+               /** Enable Descriptor DMA in Device mode */
+               unsigned descdma:1;
+               unsigned perschintvl:2;
+               unsigned resvalid:6;
+       } b;
+} dcfg_data_t;
+
+/**
+ * This union represents the bit fields in the Device Control
+ * Register.  Read the register into the <i>d32</i> member then
+ * set/clear the bits using the <i>b</i>it elements.
+ */
+typedef union dctl_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Remote Wakeup */
+               unsigned rmtwkupsig:1;
+               /** Soft Disconnect */
+               unsigned sftdiscon:1;
+               /** Global Non-Periodic IN NAK Status */
+               unsigned gnpinnaksts:1;
+               /** Global OUT NAK Status */
+               unsigned goutnaksts:1;
+               /** Test Control */
+               unsigned tstctl:3;
+               /** Set Global Non-Periodic IN NAK */
+               unsigned sgnpinnak:1;
+               /** Clear Global Non-Periodic IN NAK */
+               unsigned cgnpinnak:1;
+               /** Set Global OUT NAK */
+               unsigned sgoutnak:1;
+               /** Clear Global OUT NAK */
+               unsigned cgoutnak:1;
+               /** Power-On Programming Done */
+               unsigned pwronprgdone:1;
+               /** Reserved */
+               unsigned reserved:1;
+               /** Global Multi Count */
+               unsigned gmc:2;
+               /** Ignore Frame Number for ISOC EPs */
+               unsigned ifrmnum:1;
+               /** NAK on Babble */
+               unsigned nakonbble:1;
+               /** Enable Continue on BNA */
+               unsigned encontonbna:1;
+
+               unsigned reserved18_31:14;
+       } b;
+} dctl_data_t;
+
+/**
+ * This union represents the bit fields in the Device Status
+ * Register.  Read the register into the <i>d32</i> member then
+ * set/clear the bits using the <i>b</i>it elements.
+ */
+typedef union dsts_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Suspend Status */
+               unsigned suspsts:1;
+               /** Enumerated Speed */
+               unsigned enumspd:2;
+#define DWC_DSTS_ENUMSPD_HS_PHY_30MHZ_OR_60MHZ 0
+#define DWC_DSTS_ENUMSPD_FS_PHY_30MHZ_OR_60MHZ 1
+#define DWC_DSTS_ENUMSPD_LS_PHY_6MHZ              2
+#define DWC_DSTS_ENUMSPD_FS_PHY_48MHZ             3
+               /** Erratic Error */
+               unsigned errticerr:1;
+               unsigned reserved4_7:4;
+               /** Frame or Microframe Number of the received SOF */
+               unsigned soffn:14;
+               unsigned reserved22_31:10;
+       } b;
+} dsts_data_t;
+
+/**
+ * This union represents the bit fields in the Device IN EP Interrupt
+ * Register and the Device IN EP Common Mask Register.
+ *
+ * - Read the register into the <i>d32</i> member then set/clear the
+ *      bits using the <i>b</i>it elements.
+ */
+typedef union diepint_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Transfer complete mask */
+               unsigned xfercompl:1;
+               /** Endpoint disable mask */
+               unsigned epdisabled:1;
+               /** AHB Error mask */
+               unsigned ahberr:1;
+               /** TimeOUT Handshake mask (non-ISOC EPs) */
+               unsigned timeout:1;
+               /** IN Token received with TxF Empty mask */
+               unsigned intktxfemp:1;
+               /** IN Token Received with EP mismatch mask */
+               unsigned intknepmis:1;
+               /** IN Endpoint NAK Effective mask */
+               unsigned inepnakeff:1;
+               /** Reserved */
+               unsigned emptyintr:1;
+
+               unsigned txfifoundrn:1;
+
+               /** BNA Interrupt mask */
+               unsigned bna:1;
+
+               unsigned reserved10_12:3;
+               /** BNA Interrupt mask */
+               unsigned nak:1;
+
+               unsigned reserved14_31:18;
+       } b;
+} diepint_data_t;
+
+/**
+ * This union represents the bit fields in the Device IN EP
+ * Common/Dedicated Interrupt Mask Register.
+ */
+typedef union diepint_data diepmsk_data_t;
+
+/**
+ * This union represents the bit fields in the Device OUT EP Interrupt
+ * Registerand Device OUT EP Common Interrupt Mask Register.
+ *
+ * - Read the register into the <i>d32</i> member then set/clear the
+ *      bits using the <i>b</i>it elements.
+ */
+typedef union doepint_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Transfer complete */
+               unsigned xfercompl:1;
+               /** Endpoint disable  */
+               unsigned epdisabled:1;
+               /** AHB Error */
+               unsigned ahberr:1;
+               /** Setup Phase Done (contorl EPs) */
+               unsigned setup:1;
+               /** OUT Token Received when Endpoint Disabled */
+               unsigned outtknepdis:1;
+
+               unsigned stsphsercvd:1;
+               /** Back-to-Back SETUP Packets Received */
+               unsigned back2backsetup:1;
+
+               unsigned reserved7:1;
+               /** OUT packet Error */
+               unsigned outpkterr:1;
+               /** BNA Interrupt */
+               unsigned bna:1;
+
+               unsigned reserved10:1;
+               /** Packet Drop Status */
+               unsigned pktdrpsts:1;
+               /** Babble Interrupt */
+               unsigned babble:1;
+               /** NAK Interrupt */
+               unsigned nak:1;
+               /** NYET Interrupt */
+               unsigned nyet:1;
+               /** Bit indicating setup packet received */
+               unsigned sr:1;
+
+               unsigned reserved16_31:16;
+       } b;
+} doepint_data_t;
+
+/**
+ * This union represents the bit fields in the Device OUT EP
+ * Common/Dedicated Interrupt Mask Register.
+ */
+typedef union doepint_data doepmsk_data_t;
+
+/**
+ * This union represents the bit fields in the Device All EP Interrupt
+ * and Mask Registers.
+ * - Read the register into the <i>d32</i> member then set/clear the
+ *      bits using the <i>b</i>it elements.
+ */
+typedef union daint_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** IN Endpoint bits */
+               unsigned in:16;
+               /** OUT Endpoint bits */
+               unsigned out:16;
+       } ep;
+       struct {
+               /** IN Endpoint bits */
+               unsigned inep0:1;
+               unsigned inep1:1;
+               unsigned inep2:1;
+               unsigned inep3:1;
+               unsigned inep4:1;
+               unsigned inep5:1;
+               unsigned inep6:1;
+               unsigned inep7:1;
+               unsigned inep8:1;
+               unsigned inep9:1;
+               unsigned inep10:1;
+               unsigned inep11:1;
+               unsigned inep12:1;
+               unsigned inep13:1;
+               unsigned inep14:1;
+               unsigned inep15:1;
+               /** OUT Endpoint bits */
+               unsigned outep0:1;
+               unsigned outep1:1;
+               unsigned outep2:1;
+               unsigned outep3:1;
+               unsigned outep4:1;
+               unsigned outep5:1;
+               unsigned outep6:1;
+               unsigned outep7:1;
+               unsigned outep8:1;
+               unsigned outep9:1;
+               unsigned outep10:1;
+               unsigned outep11:1;
+               unsigned outep12:1;
+               unsigned outep13:1;
+               unsigned outep14:1;
+               unsigned outep15:1;
+       } b;
+} daint_data_t;
+
+/**
+ * This union represents the bit fields in the Device IN Token Queue
+ * Read Registers.
+ * - Read the register into the <i>d32</i> member.
+ * - READ-ONLY Register
+ */
+typedef union dtknq1_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** In Token Queue Write Pointer */
+               unsigned intknwptr:5;
+               /** Reserved */
+               unsigned reserved05_06:2;
+               /** write pointer has wrapped. */
+               unsigned wrap_bit:1;
+               /** EP Numbers of IN Tokens 0 ... 4 */
+               unsigned epnums0_5:24;
+       } b;
+} dtknq1_data_t;
+
+/**
+ * This union represents Threshold control Register
+ * - Read and write the register into the <i>d32</i> member.
+ * - READ-WRITABLE Register
+ */
+typedef union dthrctl_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** non ISO Tx Thr. Enable */
+               unsigned non_iso_thr_en:1;
+               /** ISO Tx Thr. Enable */
+               unsigned iso_thr_en:1;
+               /** Tx Thr. Length */
+               unsigned tx_thr_len:9;
+               /** AHB Threshold ratio */
+               unsigned ahb_thr_ratio:2;
+               /** Reserved */
+               unsigned reserved13_15:3;
+               /** Rx Thr. Enable */
+               unsigned rx_thr_en:1;
+               /** Rx Thr. Length */
+               unsigned rx_thr_len:9;
+               unsigned reserved26:1;
+               /** Arbiter Parking Enable*/
+               unsigned arbprken:1;
+               /** Reserved */
+               unsigned reserved28_31:4;
+       } b;
+} dthrctl_data_t;
+
+/**
+ * Device Logical IN Endpoint-Specific Registers. <i>Offsets
+ * 900h-AFCh</i>
+ *
+ * There will be one set of endpoint registers per logical endpoint
+ * implemented.
+ *
+ * <i>These registers are visible only in Device mode and must not be
+ * accessed in Host mode, as the results are unknown.</i>
+ */
+typedef struct dwc_otg_dev_in_ep_regs {
+       /** Device IN Endpoint Control Register. <i>Offset:900h +
+        * (ep_num * 20h) + 00h</i> */
+       volatile uint32_t diepctl;
+       /** Reserved. <i>Offset:900h + (ep_num * 20h) + 04h</i> */
+       uint32_t reserved04;
+       /** Device IN Endpoint Interrupt Register. <i>Offset:900h +
+        * (ep_num * 20h) + 08h</i> */
+       volatile uint32_t diepint;
+       /** Reserved. <i>Offset:900h + (ep_num * 20h) + 0Ch</i> */
+       uint32_t reserved0C;
+       /** Device IN Endpoint Transfer Size
+        * Register. <i>Offset:900h + (ep_num * 20h) + 10h</i> */
+       volatile uint32_t dieptsiz;
+       /** Device IN Endpoint DMA Address Register. <i>Offset:900h +
+        * (ep_num * 20h) + 14h</i> */
+       volatile uint32_t diepdma;
+       /** Device IN Endpoint Transmit FIFO Status Register. <i>Offset:900h +
+        * (ep_num * 20h) + 18h</i> */
+       volatile uint32_t dtxfsts;
+       /** Device IN Endpoint DMA Buffer Register. <i>Offset:900h +
+        * (ep_num * 20h) + 1Ch</i> */
+       volatile uint32_t diepdmab;
+} dwc_otg_dev_in_ep_regs_t;
+
+/**
+ * Device Logical OUT Endpoint-Specific Registers. <i>Offsets:
+ * B00h-CFCh</i>
+ *
+ * There will be one set of endpoint registers per logical endpoint
+ * implemented.
+ *
+ * <i>These registers are visible only in Device mode and must not be
+ * accessed in Host mode, as the results are unknown.</i>
+ */
+typedef struct dwc_otg_dev_out_ep_regs {
+       /** Device OUT Endpoint Control Register. <i>Offset:B00h +
+        * (ep_num * 20h) + 00h</i> */
+       volatile uint32_t doepctl;
+       /** Reserved. <i>Offset:B00h + (ep_num * 20h) + 04h</i> */
+       uint32_t reserved04;
+       /** Device OUT Endpoint Interrupt Register. <i>Offset:B00h +
+        * (ep_num * 20h) + 08h</i> */
+       volatile uint32_t doepint;
+       /** Reserved. <i>Offset:B00h + (ep_num * 20h) + 0Ch</i> */
+       uint32_t reserved0C;
+       /** Device OUT Endpoint Transfer Size Register. <i>Offset:
+        * B00h + (ep_num * 20h) + 10h</i> */
+       volatile uint32_t doeptsiz;
+       /** Device OUT Endpoint DMA Address Register. <i>Offset:B00h
+        * + (ep_num * 20h) + 14h</i> */
+       volatile uint32_t doepdma;
+       /** Reserved. <i>Offset:B00h +   * (ep_num * 20h) + 18h</i> */
+       uint32_t unused;
+       /** Device OUT Endpoint DMA Buffer Register. <i>Offset:B00h
+        * + (ep_num * 20h) + 1Ch</i> */
+       uint32_t doepdmab;
+} dwc_otg_dev_out_ep_regs_t;
+
+/**
+ * This union represents the bit fields in the Device EP Control
+ * Register.  Read the register into the <i>d32</i> member then
+ * set/clear the bits using the <i>b</i>it elements.
+ */
+typedef union depctl_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Maximum Packet Size
+                * IN/OUT EPn
+                * IN/OUT EP0 - 2 bits
+                *       2'b00: 64 Bytes
+                *       2'b01: 32
+                *       2'b10: 16
+                *       2'b11: 8 */
+               unsigned mps:11;
+#define DWC_DEP0CTL_MPS_64      0
+#define DWC_DEP0CTL_MPS_32      1
+#define DWC_DEP0CTL_MPS_16      2
+#define DWC_DEP0CTL_MPS_8       3
+
+               /** Next Endpoint
+                * IN EPn/IN EP0
+                * OUT EPn/OUT EP0 - reserved */
+               unsigned nextep:4;
+
+               /** USB Active Endpoint */
+               unsigned usbactep:1;
+
+               /** Endpoint DPID (INTR/Bulk IN and OUT endpoints)
+                * This field contains the PID of the packet going to
+                * be received or transmitted on this endpoint. The
+                * application should program the PID of the first
+                * packet going to be received or transmitted on this
+                * endpoint , after the endpoint is
+                * activated. Application use the SetD1PID and
+                * SetD0PID fields of this register to program either
+                * D0 or D1 PID.
+                *
+                * The encoding for this field is
+                *       - 0: D0
+                *       - 1: D1
+                */
+               unsigned dpid:1;
+
+               /** NAK Status */
+               unsigned naksts:1;
+
+               /** Endpoint Type
+                *      2'b00: Control
+                *      2'b01: Isochronous
+                *      2'b10: Bulk
+                *      2'b11: Interrupt */
+               unsigned eptype:2;
+
+               /** Snoop Mode
+                * OUT EPn/OUT EP0
+                * IN EPn/IN EP0 - reserved */
+               unsigned snp:1;
+
+               /** Stall Handshake */
+               unsigned stall:1;
+
+               /** Tx Fifo Number
+                * IN EPn/IN EP0
+                * OUT EPn/OUT EP0 - reserved */
+               unsigned txfnum:4;
+
+               /** Clear NAK */
+               unsigned cnak:1;
+               /** Set NAK */
+               unsigned snak:1;
+               /** Set DATA0 PID (INTR/Bulk IN and OUT endpoints)
+                * Writing to this field sets the Endpoint DPID (DPID)
+                * field in this register to DATA0. Set Even
+                * (micro)frame (SetEvenFr) (ISO IN and OUT Endpoints)
+                * Writing to this field sets the Even/Odd
+                * (micro)frame (EO_FrNum) field to even (micro)
+                * frame.
+                */
+               unsigned setd0pid:1;
+               /** Set DATA1 PID (INTR/Bulk IN and OUT endpoints)
+                * Writing to this field sets the Endpoint DPID (DPID)
+                * field in this register to DATA1 Set Odd
+                * (micro)frame (SetOddFr) (ISO IN and OUT Endpoints)
+                * Writing to this field sets the Even/Odd
+                * (micro)frame (EO_FrNum) field to odd (micro) frame.
+                */
+               unsigned setd1pid:1;
+
+               /** Endpoint Disable */
+               unsigned epdis:1;
+               /** Endpoint Enable */
+               unsigned epena:1;
+       } b;
+} depctl_data_t;
+
+/**
+ * This union represents the bit fields in the Device EP Transfer
+ * Size Register.  Read the register into the <i>d32</i> member then
+ * set/clear the bits using the <i>b</i>it elements.
+ */
+typedef union deptsiz_data {
+               /** raw register data */
+       uint32_t d32;
+               /** register bits */
+       struct {
+               /** Transfer size */
+               unsigned xfersize:19;
+/** Max packet count for EP (pow(2,10)-1) */
+#define MAX_PKT_CNT 1023
+               /** Packet Count */
+               unsigned pktcnt:10;
+               /** Multi Count - Periodic IN endpoints */
+               unsigned mc:2;
+               unsigned reserved:1;
+       } b;
+} deptsiz_data_t;
+
+/**
+ * This union represents the bit fields in the Device EP 0 Transfer
+ * Size Register.  Read the register into the <i>d32</i> member then
+ * set/clear the bits using the <i>b</i>it elements.
+ */
+typedef union deptsiz0_data {
+               /** raw register data */
+       uint32_t d32;
+               /** register bits */
+       struct {
+               /** Transfer size */
+               unsigned xfersize:7;
+                               /** Reserved */
+               unsigned reserved7_18:12;
+               /** Packet Count */
+               unsigned pktcnt:2;
+                               /** Reserved */
+               unsigned reserved21_28:8;
+                               /**Setup Packet Count (DOEPTSIZ0 Only) */
+               unsigned supcnt:2;
+               unsigned reserved31;
+       } b;
+} deptsiz0_data_t;
+
+/////////////////////////////////////////////////
+// DMA Descriptor Specific Structures
+//
+
+/** Buffer status definitions */
+
+#define BS_HOST_READY  0x0
+#define BS_DMA_BUSY            0x1
+#define BS_DMA_DONE            0x2
+#define BS_HOST_BUSY   0x3
+
+/** Receive/Transmit status definitions */
+
+#define RTS_SUCCESS            0x0
+#define RTS_BUFFLUSH   0x1
+#define RTS_RESERVED   0x2
+#define RTS_BUFERR             0x3
+
+/**
+ * This union represents the bit fields in the DMA Descriptor
+ * status quadlet. Read the quadlet into the <i>d32</i> member then
+ * set/clear the bits using the <i>b</i>it, <i>b_iso_out</i> and
+ * <i>b_iso_in</i> elements.
+ */
+typedef union dev_dma_desc_sts {
+               /** raw register data */
+       uint32_t d32;
+               /** quadlet bits */
+       struct {
+               /** Received number of bytes */
+               unsigned bytes:16;
+               /** NAK bit - only for OUT EPs */
+               unsigned nak:1;
+               unsigned reserved17_22:6;
+               /** Multiple Transfer - only for OUT EPs */
+               unsigned mtrf:1;
+               /** Setup Packet received - only for OUT EPs */
+               unsigned sr:1;
+               /** Interrupt On Complete */
+               unsigned ioc:1;
+               /** Short Packet */
+               unsigned sp:1;
+               /** Last */
+               unsigned l:1;
+               /** Receive Status */
+               unsigned sts:2;
+               /** Buffer Status */
+               unsigned bs:2;
+       } b;
+
+//#ifdef DWC_EN_ISOC
+               /** iso out quadlet bits */
+       struct {
+               /** Received number of bytes */
+               unsigned rxbytes:11;
+
+               unsigned reserved11:1;
+               /** Frame Number */
+               unsigned framenum:11;
+               /** Received ISO Data PID */
+               unsigned pid:2;
+               /** Interrupt On Complete */
+               unsigned ioc:1;
+               /** Short Packet */
+               unsigned sp:1;
+               /** Last */
+               unsigned l:1;
+               /** Receive Status */
+               unsigned rxsts:2;
+               /** Buffer Status */
+               unsigned bs:2;
+       } b_iso_out;
+
+               /** iso in quadlet bits */
+       struct {
+               /** Transmited number of bytes */
+               unsigned txbytes:12;
+               /** Frame Number */
+               unsigned framenum:11;
+               /** Transmited ISO Data PID */
+               unsigned pid:2;
+               /** Interrupt On Complete */
+               unsigned ioc:1;
+               /** Short Packet */
+               unsigned sp:1;
+               /** Last */
+               unsigned l:1;
+               /** Transmit Status */
+               unsigned txsts:2;
+               /** Buffer Status */
+               unsigned bs:2;
+       } b_iso_in;
+//#endif                                /* DWC_EN_ISOC */
+} dev_dma_desc_sts_t;
+
+/**
+ * DMA Descriptor structure
+ *
+ * DMA Descriptor structure contains two quadlets:
+ * Status quadlet and Data buffer pointer.
+ */
+typedef struct dwc_otg_dev_dma_desc {
+       /** DMA Descriptor status quadlet */
+       dev_dma_desc_sts_t status;
+       /** DMA Descriptor data buffer pointer */
+       uint32_t buf;
+} dwc_otg_dev_dma_desc_t;
+
+/**
+ * The dwc_otg_dev_if structure contains information needed to manage
+ * the DWC_otg controller acting in device mode. It represents the
+ * programming view of the device-specific aspects of the controller.
+ */
+typedef struct dwc_otg_dev_if {
+       /** Pointer to device Global registers.
+        * Device Global Registers starting at offset 800h
+        */
+       dwc_otg_device_global_regs_t *dev_global_regs;
+#define DWC_DEV_GLOBAL_REG_OFFSET 0x800
+
+       /**
+        * Device Logical IN Endpoint-Specific Registers 900h-AFCh
+        */
+       dwc_otg_dev_in_ep_regs_t *in_ep_regs[MAX_EPS_CHANNELS];
+#define DWC_DEV_IN_EP_REG_OFFSET 0x900
+#define DWC_EP_REG_OFFSET 0x20
+
+       /** Device Logical OUT Endpoint-Specific Registers B00h-CFCh */
+       dwc_otg_dev_out_ep_regs_t *out_ep_regs[MAX_EPS_CHANNELS];
+#define DWC_DEV_OUT_EP_REG_OFFSET 0xB00
+
+       /* Device configuration information */
+       uint8_t speed;                           /**< Device Speed      0: Unknown, 1: LS, 2:FS, 3: HS */
+       uint8_t num_in_eps;              /**< Number # of Tx EP range: 0-15 exept ep0 */
+       uint8_t num_out_eps;             /**< Number # of Rx EP range: 0-15 exept ep 0*/
+
+       /** Size of periodic FIFOs (Bytes) */
+       uint16_t perio_tx_fifo_size[MAX_PERIO_FIFOS];
+
+       /** Size of Tx FIFOs (Bytes) */
+       uint16_t tx_fifo_size[MAX_TX_FIFOS];
+
+       /** Thresholding enable flags and length varaiables **/
+       uint16_t rx_thr_en;
+       uint16_t iso_tx_thr_en;
+       uint16_t non_iso_tx_thr_en;
+
+       uint16_t rx_thr_length;
+       uint16_t tx_thr_length;
+
+       /**
+        * Pointers to the DMA Descriptors for EP0 Control
+        * transfers (virtual and physical)
+        */
+
+       /** 2 descriptors for SETUP packets */
+       dwc_dma_t dma_setup_desc_addr[2];
+       dwc_otg_dev_dma_desc_t *setup_desc_addr[2];
+
+       /** Pointer to Descriptor with latest SETUP packet */
+       dwc_otg_dev_dma_desc_t *psetup;
+
+       /** Index of current SETUP handler descriptor */
+       uint32_t setup_desc_index;
+
+       /** Descriptor for Data In or Status In phases */
+       dwc_dma_t dma_in_desc_addr;
+       dwc_otg_dev_dma_desc_t *in_desc_addr;
+
+       /** Descriptor for Data Out or Status Out phases */
+       dwc_dma_t dma_out_desc_addr;
+       dwc_otg_dev_dma_desc_t *out_desc_addr;
+
+       /** Setup Packet Detected - if set clear NAK when queueing */
+       uint32_t spd;
+       /** Isoc ep pointer on which incomplete happens */
+       void *isoc_ep;
+
+} dwc_otg_dev_if_t;
+
+/////////////////////////////////////////////////
+// Host Mode Register Structures
+//
+/**
+ * The Host Global Registers structure defines the size and relative
+ * field offsets for the Host Mode Global Registers.  Host Global
+ * Registers offsets 400h-7FFh.
+*/
+typedef struct dwc_otg_host_global_regs {
+       /** Host Configuration Register.   <i>Offset: 400h</i> */
+       volatile uint32_t hcfg;
+       /** Host Frame Interval Register.       <i>Offset: 404h</i> */
+       volatile uint32_t hfir;
+       /** Host Frame Number / Frame Remaining Register. <i>Offset: 408h</i> */
+       volatile uint32_t hfnum;
+       /** Reserved.   <i>Offset: 40Ch</i> */
+       uint32_t reserved40C;
+       /** Host Periodic Transmit FIFO/ Queue Status Register. <i>Offset: 410h</i> */
+       volatile uint32_t hptxsts;
+       /** Host All Channels Interrupt Register. <i>Offset: 414h</i> */
+       volatile uint32_t haint;
+       /** Host All Channels Interrupt Mask Register. <i>Offset: 418h</i> */
+       volatile uint32_t haintmsk;
+       /** Host Frame List Base Address Register . <i>Offset: 41Ch</i> */
+       volatile uint32_t hflbaddr;
+} dwc_otg_host_global_regs_t;
+
+/**
+ * This union represents the bit fields in the Host Configuration Register.
+ * Read the register into the <i>d32</i> member then set/clear the bits using
+ * the <i>b</i>it elements. Write the <i>d32</i> member to the hcfg register.
+ */
+typedef union hcfg_data {
+       /** raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               /** FS/LS Phy Clock Select */
+               unsigned fslspclksel:2;
+#define DWC_HCFG_30_60_MHZ 0
+#define DWC_HCFG_48_MHZ           1
+#define DWC_HCFG_6_MHZ    2
+
+               /** FS/LS Only Support */
+               unsigned fslssupp:1;
+               unsigned reserved3_6:4;
+               /** Enable 32-KHz Suspend Mode */
+               unsigned ena32khzs:1;
+               /** Resume Validation Periiod */
+               unsigned resvalid:8;
+               unsigned reserved16_22:7;
+               /** Enable Scatter/gather DMA in Host mode */
+               unsigned descdma:1;
+               /** Frame List Entries */
+               unsigned frlisten:2;
+               /** Enable Periodic Scheduling */
+               unsigned perschedena:1;
+               unsigned reserved27_30:4;
+               unsigned modechtimen:1;
+       } b;
+} hcfg_data_t;
+
+/**
+ * This union represents the bit fields in the Host Frame Remaing/Number
+ * Register.
+ */
+typedef union hfir_data {
+       /** raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               unsigned frint:16;
+               unsigned hfirrldctrl:1;
+               unsigned reserved:15;
+       } b;
+} hfir_data_t;
+
+/**
+ * This union represents the bit fields in the Host Frame Remaing/Number
+ * Register.
+ */
+typedef union hfnum_data {
+       /** raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               unsigned frnum:16;
+#define DWC_HFNUM_MAX_FRNUM 0x3FFF
+               unsigned frrem:16;
+       } b;
+} hfnum_data_t;
+
+typedef union hptxsts_data {
+       /** raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               unsigned ptxfspcavail:16;
+               unsigned ptxqspcavail:8;
+               /** Top of the Periodic Transmit Request Queue
+                *      - bit 24 - Terminate (last entry for the selected channel)
+                *      - bits 26:25 - Token Type
+                *        - 2'b00 - Zero length
+                *        - 2'b01 - Ping
+                *        - 2'b10 - Disable
+                *      - bits 30:27 - Channel Number
+                *      - bit 31 - Odd/even microframe
+                */
+               unsigned ptxqtop_terminate:1;
+               unsigned ptxqtop_token:2;
+               unsigned ptxqtop_chnum:4;
+               unsigned ptxqtop_odd:1;
+       } b;
+} hptxsts_data_t;
+
+/**
+ * This union represents the bit fields in the Host Port Control and Status
+ * Register. Read the register into the <i>d32</i> member then set/clear the
+ * bits using the <i>b</i>it elements. Write the <i>d32</i> member to the
+ * hprt0 register.
+ */
+typedef union hprt0_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned prtconnsts:1;
+               unsigned prtconndet:1;
+               unsigned prtena:1;
+               unsigned prtenchng:1;
+               unsigned prtovrcurract:1;
+               unsigned prtovrcurrchng:1;
+               unsigned prtres:1;
+               unsigned prtsusp:1;
+               unsigned prtrst:1;
+               unsigned reserved9:1;
+               unsigned prtlnsts:2;
+               unsigned prtpwr:1;
+               unsigned prttstctl:4;
+               unsigned prtspd:2;
+#define DWC_HPRT0_PRTSPD_HIGH_SPEED 0
+#define DWC_HPRT0_PRTSPD_FULL_SPEED 1
+#define DWC_HPRT0_PRTSPD_LOW_SPEED     2
+               unsigned reserved19_31:13;
+       } b;
+} hprt0_data_t;
+
+/**
+ * This union represents the bit fields in the Host All Interrupt
+ * Register.
+ */
+typedef union haint_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned ch0:1;
+               unsigned ch1:1;
+               unsigned ch2:1;
+               unsigned ch3:1;
+               unsigned ch4:1;
+               unsigned ch5:1;
+               unsigned ch6:1;
+               unsigned ch7:1;
+               unsigned ch8:1;
+               unsigned ch9:1;
+               unsigned ch10:1;
+               unsigned ch11:1;
+               unsigned ch12:1;
+               unsigned ch13:1;
+               unsigned ch14:1;
+               unsigned ch15:1;
+               unsigned reserved:16;
+       } b;
+
+       struct {
+               unsigned chint:16;
+               unsigned reserved:16;
+       } b2;
+} haint_data_t;
+
+/**
+ * This union represents the bit fields in the Host All Interrupt
+ * Register.
+ */
+typedef union haintmsk_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned ch0:1;
+               unsigned ch1:1;
+               unsigned ch2:1;
+               unsigned ch3:1;
+               unsigned ch4:1;
+               unsigned ch5:1;
+               unsigned ch6:1;
+               unsigned ch7:1;
+               unsigned ch8:1;
+               unsigned ch9:1;
+               unsigned ch10:1;
+               unsigned ch11:1;
+               unsigned ch12:1;
+               unsigned ch13:1;
+               unsigned ch14:1;
+               unsigned ch15:1;
+               unsigned reserved:16;
+       } b;
+
+       struct {
+               unsigned chint:16;
+               unsigned reserved:16;
+       } b2;
+} haintmsk_data_t;
+
+/**
+ * Host Channel Specific Registers. <i>500h-5FCh</i>
+ */
+typedef struct dwc_otg_hc_regs {
+       /** Host Channel 0 Characteristic Register. <i>Offset: 500h + (chan_num * 20h) + 00h</i> */
+       volatile uint32_t hcchar;
+       /** Host Channel 0 Split Control Register. <i>Offset: 500h + (chan_num * 20h) + 04h</i> */
+       volatile uint32_t hcsplt;
+       /** Host Channel 0 Interrupt Register. <i>Offset: 500h + (chan_num * 20h) + 08h</i> */
+       volatile uint32_t hcint;
+       /** Host Channel 0 Interrupt Mask Register. <i>Offset: 500h + (chan_num * 20h) + 0Ch</i> */
+       volatile uint32_t hcintmsk;
+       /** Host Channel 0 Transfer Size Register. <i>Offset: 500h + (chan_num * 20h) + 10h</i> */
+       volatile uint32_t hctsiz;
+       /** Host Channel 0 DMA Address Register. <i>Offset: 500h + (chan_num * 20h) + 14h</i> */
+       volatile uint32_t hcdma;
+       volatile uint32_t reserved;
+       /** Host Channel 0 DMA Buffer Address Register. <i>Offset: 500h + (chan_num * 20h) + 1Ch</i> */
+       volatile uint32_t hcdmab;
+} dwc_otg_hc_regs_t;
+
+/**
+ * This union represents the bit fields in the Host Channel Characteristics
+ * Register. Read the register into the <i>d32</i> member then set/clear the
+ * bits using the <i>b</i>it elements. Write the <i>d32</i> member to the
+ * hcchar register.
+ */
+typedef union hcchar_data {
+       /** raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               /** Maximum packet size in bytes */
+               unsigned mps:11;
+
+               /** Endpoint number */
+               unsigned epnum:4;
+
+               /** 0: OUT, 1: IN */
+               unsigned epdir:1;
+
+               unsigned reserved:1;
+
+               /** 0: Full/high speed device, 1: Low speed device */
+               unsigned lspddev:1;
+
+               /** 0: Control, 1: Isoc, 2: Bulk, 3: Intr */
+               unsigned eptype:2;
+
+               /** Packets per frame for periodic transfers. 0 is reserved. */
+               unsigned multicnt:2;
+
+               /** Device address */
+               unsigned devaddr:7;
+
+               /**
+                * Frame to transmit periodic transaction.
+                * 0: even, 1: odd
+                */
+               unsigned oddfrm:1;
+
+               /** Channel disable */
+               unsigned chdis:1;
+
+               /** Channel enable */
+               unsigned chen:1;
+       } b;
+} hcchar_data_t;
+
+typedef union hcsplt_data {
+       /** raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               /** Port Address */
+               unsigned prtaddr:7;
+
+               /** Hub Address */
+               unsigned hubaddr:7;
+
+               /** Transaction Position */
+               unsigned xactpos:2;
+#define DWC_HCSPLIT_XACTPOS_MID 0
+#define DWC_HCSPLIT_XACTPOS_END 1
+#define DWC_HCSPLIT_XACTPOS_BEGIN 2
+#define DWC_HCSPLIT_XACTPOS_ALL 3
+
+               /** Do Complete Split */
+               unsigned compsplt:1;
+
+               /** Reserved */
+               unsigned reserved:14;
+
+               /** Split Enble */
+               unsigned spltena:1;
+       } b;
+} hcsplt_data_t;
+
+/**
+ * This union represents the bit fields in the Host All Interrupt
+ * Register.
+ */
+typedef union hcint_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** Transfer Complete */
+               unsigned xfercomp:1;
+               /** Channel Halted */
+               unsigned chhltd:1;
+               /** AHB Error */
+               unsigned ahberr:1;
+               /** STALL Response Received */
+               unsigned stall:1;
+               /** NAK Response Received */
+               unsigned nak:1;
+               /** ACK Response Received */
+               unsigned ack:1;
+               /** NYET Response Received */
+               unsigned nyet:1;
+               /** Transaction Err */
+               unsigned xacterr:1;
+               /** Babble Error */
+               unsigned bblerr:1;
+               /** Frame Overrun */
+               unsigned frmovrun:1;
+               /** Data Toggle Error */
+               unsigned datatglerr:1;
+               /** Buffer Not Available (only for DDMA mode) */
+               unsigned bna:1;
+               /** Exessive transaction error (only for DDMA mode) */
+               unsigned xcs_xact:1;
+               /** Frame List Rollover interrupt */
+               unsigned frm_list_roll:1;
+               /** Reserved */
+               unsigned reserved14_31:18;
+       } b;
+} hcint_data_t;
+
+/**
+ * This union represents the bit fields in the Host Channel Interrupt Mask
+ * Register. Read the register into the <i>d32</i> member then set/clear the
+ * bits using the <i>b</i>it elements. Write the <i>d32</i> member to the
+ * hcintmsk register.
+ */
+typedef union hcintmsk_data {
+       /** raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               unsigned xfercompl:1;
+               unsigned chhltd:1;
+               unsigned ahberr:1;
+               unsigned stall:1;
+               unsigned nak:1;
+               unsigned ack:1;
+               unsigned nyet:1;
+               unsigned xacterr:1;
+               unsigned bblerr:1;
+               unsigned frmovrun:1;
+               unsigned datatglerr:1;
+               unsigned bna:1;
+               unsigned xcs_xact:1;
+               unsigned frm_list_roll:1;
+               unsigned reserved14_31:18;
+       } b;
+} hcintmsk_data_t;
+
+/**
+ * This union represents the bit fields in the Host Channel Transfer Size
+ * Register. Read the register into the <i>d32</i> member then set/clear the
+ * bits using the <i>b</i>it elements. Write the <i>d32</i> member to the
+ * hcchar register.
+ */
+
+typedef union hctsiz_data {
+       /** raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               /** Total transfer size in bytes */
+               unsigned xfersize:19;
+
+               /** Data packets to transfer */
+               unsigned pktcnt:10;
+
+               /**
+                * Packet ID for next data packet
+                * 0: DATA0
+                * 1: DATA2
+                * 2: DATA1
+                * 3: MDATA (non-Control), SETUP (Control)
+                */
+               unsigned pid:2;
+#define DWC_HCTSIZ_DATA0 0
+#define DWC_HCTSIZ_DATA1 2
+#define DWC_HCTSIZ_DATA2 1
+#define DWC_HCTSIZ_MDATA 3
+#define DWC_HCTSIZ_SETUP 3
+
+               /** Do PING protocol when 1 */
+               unsigned dopng:1;
+       } b;
+
+       /** register bits */
+       struct {
+               /** Scheduling information */
+               unsigned schinfo:8;
+
+               /** Number of transfer descriptors.
+                * Max value:
+                * 64 in general,
+                * 256 only for HS isochronous endpoint.
+                */
+               unsigned ntd:8;
+
+               /** Data packets to transfer */
+               unsigned reserved16_28:13;
+
+               /**
+                * Packet ID for next data packet
+                * 0: DATA0
+                * 1: DATA2
+                * 2: DATA1
+                * 3: MDATA (non-Control)
+                */
+               unsigned pid:2;
+
+               /** Do PING protocol when 1 */
+               unsigned dopng:1;
+       } b_ddma;
+} hctsiz_data_t;
+
+/**
+ * This union represents the bit fields in the Host DMA Address
+ * Register used in Descriptor DMA mode.
+ */
+typedef union hcdma_data {
+       /** raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               unsigned reserved0_2:3;
+               /** Current Transfer Descriptor. Not used for ISOC */
+               unsigned ctd:8;
+               /** Start Address of Descriptor List */
+               unsigned dma_addr:21;
+       } b;
+} hcdma_data_t;
+
+/**
+ * This union represents the bit fields in the DMA Descriptor
+ * status quadlet for host mode. Read the quadlet into the <i>d32</i> member then
+ * set/clear the bits using the <i>b</i>it elements.
+ */
+typedef union host_dma_desc_sts {
+       /** raw register data */
+       uint32_t d32;
+       /** quadlet bits */
+
+       /* for non-isochronous  */
+       struct {
+               /** Number of bytes */
+               unsigned n_bytes:17;
+               /** QTD offset to jump when Short Packet received - only for IN EPs */
+               unsigned qtd_offset:6;
+               /**
+                * Set to request the core to jump to alternate QTD if
+                * Short Packet received - only for IN EPs
+                */
+               unsigned a_qtd:1;
+                /**
+                 * Setup Packet bit. When set indicates that buffer contains
+                 * setup packet.
+                 */
+               unsigned sup:1;
+               /** Interrupt On Complete */
+               unsigned ioc:1;
+               /** End of List */
+               unsigned eol:1;
+               unsigned reserved27:1;
+               /** Rx/Tx Status */
+               unsigned sts:2;
+#define DMA_DESC_STS_PKTERR    1
+               unsigned reserved30:1;
+               /** Active Bit */
+               unsigned a:1;
+       } b;
+       /* for isochronous */
+       struct {
+               /** Number of bytes */
+               unsigned n_bytes:12;
+               unsigned reserved12_24:13;
+               /** Interrupt On Complete */
+               unsigned ioc:1;
+               unsigned reserved26_27:2;
+               /** Rx/Tx Status */
+               unsigned sts:2;
+               unsigned reserved30:1;
+               /** Active Bit */
+               unsigned a:1;
+       } b_isoc;
+} host_dma_desc_sts_t;
+
+#define        MAX_DMA_DESC_SIZE               131071
+#define MAX_DMA_DESC_NUM_GENERIC       64
+#define MAX_DMA_DESC_NUM_HS_ISOC       256
+#define MAX_FRLIST_EN_NUM              64
+/**
+ * Host-mode DMA Descriptor structure
+ *
+ * DMA Descriptor structure contains two quadlets:
+ * Status quadlet and Data buffer pointer.
+ */
+typedef struct dwc_otg_host_dma_desc {
+       /** DMA Descriptor status quadlet */
+       host_dma_desc_sts_t status;
+       /** DMA Descriptor data buffer pointer */
+       uint32_t buf;
+} dwc_otg_host_dma_desc_t;
+
+/** OTG Host Interface Structure.
+ *
+ * The OTG Host Interface Structure structure contains information
+ * needed to manage the DWC_otg controller acting in host mode. It
+ * represents the programming view of the host-specific aspects of the
+ * controller.
+ */
+typedef struct dwc_otg_host_if {
+       /** Host Global Registers starting at offset 400h.*/
+       dwc_otg_host_global_regs_t *host_global_regs;
+#define DWC_OTG_HOST_GLOBAL_REG_OFFSET 0x400
+
+       /** Host Port 0 Control and Status Register */
+       volatile uint32_t *hprt0;
+#define DWC_OTG_HOST_PORT_REGS_OFFSET 0x440
+
+       /** Host Channel Specific Registers at offsets 500h-5FCh. */
+       dwc_otg_hc_regs_t *hc_regs[MAX_EPS_CHANNELS];
+#define DWC_OTG_HOST_CHAN_REGS_OFFSET 0x500
+#define DWC_OTG_CHAN_REGS_OFFSET 0x20
+
+       /* Host configuration information */
+       /** Number of Host Channels (range: 1-16) */
+       uint8_t num_host_channels;
+       /** Periodic EPs supported (0: no, 1: yes) */
+       uint8_t perio_eps_supported;
+       /** Periodic Tx FIFO Size (Only 1 host periodic Tx FIFO) */
+       uint16_t perio_tx_fifo_size;
+
+} dwc_otg_host_if_t;
+
+/**
+ * This union represents the bit fields in the Power and Clock Gating Control
+ * Register. Read the register into the <i>d32</i> member then set/clear the
+ * bits using the <i>b</i>it elements.
+ */
+typedef union pcgcctl_data {
+       /** raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               /** Stop Pclk */
+               unsigned stoppclk:1;
+               /** Gate Hclk */
+               unsigned gatehclk:1;
+               /** Power Clamp */
+               unsigned pwrclmp:1;
+               /** Reset Power Down Modules */
+               unsigned rstpdwnmodule:1;
+               /** Reserved */
+               unsigned reserved:1;
+               /** Enable Sleep Clock Gating (Enbl_L1Gating) */
+               unsigned enbl_sleep_gating:1;
+               /** PHY In Sleep (PhySleep) */
+               unsigned phy_in_sleep:1;
+               /** Deep Sleep*/
+               unsigned deep_sleep:1;
+               unsigned resetaftsusp:1;
+               unsigned restoremode:1;
+               unsigned enbl_extnd_hiber:1;
+               unsigned extnd_hiber_pwrclmp:1;
+               unsigned extnd_hiber_switch:1;
+               unsigned ess_reg_restored:1;
+               unsigned prt_clk_sel:2;
+               unsigned port_power:1;
+               unsigned max_xcvrselect:2;
+               unsigned max_termsel:1;
+               unsigned mac_dev_addr:7;
+               unsigned p2hd_dev_enum_spd:2;
+               unsigned p2hd_prt_spd:2;
+               unsigned if_dev_mode:1;
+       } b;
+} pcgcctl_data_t;
+
+/**
+ * This union represents the bit fields in the Global Data FIFO Software
+ * Configuration Register. Read the register into the <i>d32</i> member then
+ * set/clear the bits using the <i>b</i>it elements.
+ */
+typedef union gdfifocfg_data {
+       /* raw register data */
+       uint32_t d32;
+       /** register bits */
+       struct {
+               /** OTG Data FIFO depth */
+               unsigned gdfifocfg:16;
+               /** Start address of EP info controller */
+               unsigned epinfobase:16;
+       } b;
+} gdfifocfg_data_t;
+
+/**
+ * This union represents the bit fields in the Global Power Down Register
+ * Register. Read the register into the <i>d32</i> member then set/clear the
+ * bits using the <i>b</i>it elements.
+ */
+typedef union gpwrdn_data {
+       /* raw register data */
+       uint32_t d32;
+
+       /** register bits */
+       struct {
+               /** PMU Interrupt Select */
+               unsigned pmuintsel:1;
+               /** PMU Active */
+               unsigned pmuactv:1;
+               /** Restore */
+               unsigned restore:1;
+               /** Power Down Clamp */
+               unsigned pwrdnclmp:1;
+               /** Power Down Reset */
+               unsigned pwrdnrstn:1;
+               /** Power Down Switch */
+               unsigned pwrdnswtch:1;
+               /** Disable VBUS */
+               unsigned dis_vbus:1;
+               /** Line State Change */
+               unsigned lnstschng:1;
+               /** Line state change mask */
+               unsigned lnstchng_msk:1;
+               /** Reset Detected */
+               unsigned rst_det:1;
+               /** Reset Detect mask */
+               unsigned rst_det_msk:1;
+               /** Disconnect Detected */
+               unsigned disconn_det:1;
+               /** Disconnect Detect mask */
+               unsigned disconn_det_msk:1;
+               /** Connect Detected*/
+               unsigned connect_det:1;
+               /** Connect Detected Mask*/
+               unsigned connect_det_msk:1;
+               /** SRP Detected */
+               unsigned srp_det:1;
+               /** SRP Detect mask */
+               unsigned srp_det_msk:1;
+               /** Status Change Interrupt */
+               unsigned sts_chngint:1;
+               /** Status Change Interrupt Mask */
+               unsigned sts_chngint_msk:1;
+               /** Line State */
+               unsigned linestate:2;
+               /** Indicates current mode(status of IDDIG signal) */
+               unsigned idsts:1;
+               /** B Session Valid signal status*/
+               unsigned bsessvld:1;
+               /** ADP Event Detected */
+               unsigned adp_int:1;
+               /** Multi Valued ID pin */
+               unsigned mult_val_id_bc:5;
+               /** Reserved 24_31 */
+               unsigned reserved29_31:3;
+       } b;
+} gpwrdn_data_t;
+
+#endif
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/test/Makefile
@@ -0,0 +1,16 @@
+
+PERL=/usr/bin/perl
+PL_TESTS=test_sysfs.pl test_mod_param.pl
+
+.PHONY : test
+test : perl_tests
+
+perl_tests :
+       @echo
+       @echo Running perl tests
+       @for test in $(PL_TESTS); do \
+         if $(PERL) ./$$test ; then \
+           echo "=======> $$test, PASSED" ; \
+         else echo "=======> $$test, FAILED" ; \
+         fi \
+       done
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/test/dwc_otg_test.pm
@@ -0,0 +1,337 @@
+package dwc_otg_test;
+
+use strict;
+use Exporter ();
+
+use vars qw(@ISA @EXPORT
+$sysfsdir $paramdir $errors $params
+);
+
+@ISA = qw(Exporter);
+
+#
+# Globals
+#
+$sysfsdir = "/sys/devices/lm0";
+$paramdir = "/sys/module/dwc_otg";
+$errors = 0;
+
+$params = [
+          {
+           NAME => "otg_cap",
+           DEFAULT => 0,
+           ENUM => [],
+           LOW => 0,
+           HIGH => 2
+          },
+          {
+           NAME => "dma_enable",
+           DEFAULT => 0,
+           ENUM => [],
+           LOW => 0,
+           HIGH => 1
+          },
+          {
+           NAME => "dma_burst_size",
+           DEFAULT => 32,
+           ENUM => [1, 4, 8, 16, 32, 64, 128, 256],
+           LOW => 1,
+           HIGH => 256
+          },
+          {
+           NAME => "host_speed",
+           DEFAULT => 0,
+           ENUM => [],
+           LOW => 0,
+           HIGH => 1
+          },
+          {
+           NAME => "host_support_fs_ls_low_power",
+           DEFAULT => 0,
+           ENUM => [],
+           LOW => 0,
+           HIGH => 1
+          },
+          {
+           NAME => "host_ls_low_power_phy_clk",
+           DEFAULT => 0,
+           ENUM => [],
+           LOW => 0,
+           HIGH => 1
+          },
+          {
+           NAME => "dev_speed",
+           DEFAULT => 0,
+           ENUM => [],
+           LOW => 0,
+           HIGH => 1
+          },
+          {
+           NAME => "enable_dynamic_fifo",
+           DEFAULT => 1,
+           ENUM => [],
+           LOW => 0,
+           HIGH => 1
+          },
+          {
+           NAME => "data_fifo_size",
+           DEFAULT => 8192,
+           ENUM => [],
+           LOW => 32,
+           HIGH => 32768
+          },
+          {
+           NAME => "dev_rx_fifo_size",
+           DEFAULT => 1064,
+           ENUM => [],
+           LOW => 16,
+           HIGH => 32768
+          },
+          {
+           NAME => "dev_nperio_tx_fifo_size",
+           DEFAULT => 1024,
+           ENUM => [],
+           LOW => 16,
+           HIGH => 32768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_1",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_2",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_3",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_4",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_5",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_6",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_7",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_8",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_9",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_10",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_11",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_12",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_13",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_14",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "dev_perio_tx_fifo_size_15",
+           DEFAULT => 256,
+           ENUM => [],
+           LOW => 4,
+           HIGH => 768
+          },
+          {
+           NAME => "host_rx_fifo_size",
+           DEFAULT => 1024,
+           ENUM => [],
+           LOW => 16,
+           HIGH => 32768
+          },
+          {
+           NAME => "host_nperio_tx_fifo_size",
+           DEFAULT => 1024,
+           ENUM => [],
+           LOW => 16,
+           HIGH => 32768
+          },
+          {
+           NAME => "host_perio_tx_fifo_size",
+           DEFAULT => 1024,
+           ENUM => [],
+           LOW => 16,
+           HIGH => 32768
+          },
+          {
+           NAME => "max_transfer_size",
+           DEFAULT => 65535,
+           ENUM => [],
+           LOW => 2047,
+           HIGH => 65535
+          },
+          {
+           NAME => "max_packet_count",
+           DEFAULT => 511,
+           ENUM => [],
+           LOW => 15,
+           HIGH => 511
+          },
+          {
+           NAME => "host_channels",
+           DEFAULT => 12,
+           ENUM => [],
+           LOW => 1,
+           HIGH => 16
+          },
+          {
+           NAME => "dev_endpoints",
+           DEFAULT => 6,
+           ENUM => [],
+           LOW => 1,
+           HIGH => 15
+          },
+          {
+           NAME => "phy_type",
+           DEFAULT => 1,
+           ENUM => [],
+           LOW => 0,
+           HIGH => 2
+          },
+          {
+           NAME => "phy_utmi_width",
+           DEFAULT => 16,
+           ENUM => [8, 16],
+           LOW => 8,
+           HIGH => 16
+          },
+          {
+           NAME => "phy_ulpi_ddr",
+           DEFAULT => 0,
+           ENUM => [],
+           LOW => 0,
+           HIGH => 1
+          },
+         ];
+
+
+#
+#
+sub check_arch {
+  $_ = `uname -m`;
+  chomp;
+  unless (m/armv4tl/) {
+    warn "# \n# Can't execute on $_.  Run on integrator platform.\n# \n";
+    return 0;
+  }
+  return 1;
+}
+
+#
+#
+sub load_module {
+  my $params = shift;
+  print "\nRemoving Module\n";
+  system "rmmod dwc_otg";
+  print "Loading Module\n";
+  if ($params ne "") {
+    print "Module Parameters: $params\n";
+  }
+  if (system("modprobe dwc_otg $params")) {
+    warn "Unable to load module\n";
+    return 0;
+  }
+  return 1;
+}
+
+#
+#
+sub test_status {
+  my $arg = shift;
+
+  print "\n";
+
+  if (defined $arg) {
+    warn "WARNING: $arg\n";
+  }
+
+  if ($errors > 0) {
+    warn "TEST FAILED with $errors errors\n";
+    return 0;
+  } else {
+    print "TEST PASSED\n";
+    return 0 if (defined $arg);
+  }
+  return 1;
+}
+
+#
+#
+@EXPORT = qw(
+$sysfsdir
+$paramdir
+$params
+$errors
+check_arch
+load_module
+test_status
+);
+
+1;
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/test/test_mod_param.pl
@@ -0,0 +1,133 @@
+#!/usr/bin/perl -w
+#
+# Run this program on the integrator.
+#
+# - Tests module parameter default values.
+# - Tests setting of valid module parameter values via modprobe.
+# - Tests invalid module parameter values.
+# -----------------------------------------------------------------------------
+use strict;
+use dwc_otg_test;
+
+check_arch() or die;
+
+#
+#
+sub test {
+  my ($param,$expected) = @_;
+  my $value = get($param);
+
+  if ($value == $expected) {
+    print "$param = $value, okay\n";
+  }
+
+  else {
+    warn "ERROR: value of $param != $expected, $value\n";
+    $errors ++;
+  }
+}
+
+#
+#
+sub get {
+  my $param = shift;
+  my $tmp = `cat $paramdir/$param`;
+  chomp $tmp;
+  return $tmp;
+}
+
+#
+#
+sub test_main {
+
+  print "\nTesting Module Parameters\n";
+
+  load_module("") or die;
+
+  # Test initial values
+  print "\nTesting Default Values\n";
+  foreach (@{$params}) {
+    test ($_->{NAME}, $_->{DEFAULT});
+  }
+
+  # Test low value
+  print "\nTesting Low Value\n";
+  my $cmd_params = "";
+  foreach (@{$params}) {
+    $cmd_params = $cmd_params . "$_->{NAME}=$_->{LOW} ";
+  }
+  load_module($cmd_params) or die;
+
+  foreach (@{$params}) {
+    test ($_->{NAME}, $_->{LOW});
+  }
+
+  # Test high value
+  print "\nTesting High Value\n";
+  $cmd_params = "";
+  foreach (@{$params}) {
+    $cmd_params = $cmd_params . "$_->{NAME}=$_->{HIGH} ";
+  }
+  load_module($cmd_params) or die;
+
+  foreach (@{$params}) {
+    test ($_->{NAME}, $_->{HIGH});
+  }
+
+  # Test Enum
+  print "\nTesting Enumerated\n";
+  foreach (@{$params}) {
+    if (defined $_->{ENUM}) {
+      my $value;
+      foreach $value (@{$_->{ENUM}}) {
+       $cmd_params = "$_->{NAME}=$value";
+       load_module($cmd_params) or die;
+       test ($_->{NAME}, $value);
+      }
+    }
+  }
+
+  # Test Invalid Values
+  print "\nTesting Invalid Values\n";
+  $cmd_params = "";
+  foreach (@{$params}) {
+    $cmd_params = $cmd_params . sprintf "$_->{NAME}=%d ", $_->{LOW}-1;
+  }
+  load_module($cmd_params) or die;
+
+  foreach (@{$params}) {
+    test ($_->{NAME}, $_->{DEFAULT});
+  }
+
+  $cmd_params = "";
+  foreach (@{$params}) {
+    $cmd_params = $cmd_params . sprintf "$_->{NAME}=%d ", $_->{HIGH}+1;
+  }
+  load_module($cmd_params) or die;
+
+  foreach (@{$params}) {
+    test ($_->{NAME}, $_->{DEFAULT});
+  }
+
+  print "\nTesting Enumerated\n";
+  foreach (@{$params}) {
+    if (defined $_->{ENUM}) {
+      my $value;
+      foreach $value (@{$_->{ENUM}}) {
+       $value = $value + 1;
+       $cmd_params = "$_->{NAME}=$value";
+       load_module($cmd_params) or die;
+       test ($_->{NAME}, $_->{DEFAULT});
+       $value = $value - 2;
+       $cmd_params = "$_->{NAME}=$value";
+       load_module($cmd_params) or die;
+       test ($_->{NAME}, $_->{DEFAULT});
+      }
+    }
+  }
+
+  test_status() or die;
+}
+
+test_main();
+0;
--- /dev/null
+++ b/drivers/usb/host/dwc_otg/test/test_sysfs.pl
@@ -0,0 +1,193 @@
+#!/usr/bin/perl -w
+#
+# Run this program on the integrator
+# - Tests select sysfs attributes.
+# - Todo ... test more attributes, hnp/srp, buspower/bussuspend, etc.
+# -----------------------------------------------------------------------------
+use strict;
+use dwc_otg_test;
+
+check_arch() or die;
+
+#
+#
+sub test {
+  my ($attr,$expected) = @_;
+  my $string = get($attr);
+
+  if ($string eq $expected) {
+    printf("$attr = $string, okay\n");
+  }
+  else {
+    warn "ERROR: value of $attr != $expected, $string\n";
+    $errors ++;
+  }
+}
+
+#
+#
+sub set {
+  my ($reg, $value) = @_;
+  system "echo $value > $sysfsdir/$reg";
+}
+
+#
+#
+sub get {
+  my $attr = shift;
+  my $string = `cat $sysfsdir/$attr`;
+  chomp $string;
+  if ($string =~ m/\s\=\s/) {
+    my $tmp;
+    ($tmp, $string) = split /\s=\s/, $string;
+  }
+  return $string;
+}
+
+#
+#
+sub test_main {
+  print("\nTesting Sysfs Attributes\n");
+
+  load_module("") or die;
+
+  # Test initial values of regoffset/regvalue/guid/gsnpsid
+  print("\nTesting Default Values\n");
+
+  test("regoffset", "0xffffffff");
+  test("regvalue", "invalid offset");
+  test("guid", "0x12345678");  # this will fail if it has been changed
+  test("gsnpsid", "0x4f54200a");
+
+  # Test operation of regoffset/regvalue
+  print("\nTesting regoffset\n");
+  set('regoffset', '5a5a5a5a');
+  test("regoffset", "0xffffffff");
+
+  set('regoffset', '0');
+  test("regoffset", "0x00000000");
+
+  set('regoffset', '40000');
+  test("regoffset", "0x00000000");
+
+  set('regoffset', '3ffff');
+  test("regoffset", "0x0003ffff");
+
+  set('regoffset', '1');
+  test("regoffset", "0x00000001");
+
+  print("\nTesting regvalue\n");
+  set('regoffset', '3c');
+  test("regvalue", "0x12345678");
+  set('regvalue', '5a5a5a5a');
+  test("regvalue", "0x5a5a5a5a");
+  set('regvalue','a5a5a5a5');
+  test("regvalue", "0xa5a5a5a5");
+  set('guid','12345678');
+
+  # Test HNP Capable
+  print("\nTesting HNP Capable bit\n");
+  set('hnpcapable', '1');
+  test("hnpcapable", "0x1");
+  set('hnpcapable','0');
+  test("hnpcapable", "0x0");
+
+  set('regoffset','0c');
+
+  my $old = get('gusbcfg');
+  print("setting hnpcapable\n");
+  set('hnpcapable', '1');
+  test("hnpcapable", "0x1");
+  test('gusbcfg', sprintf "0x%08x", (oct ($old) | (1<<9)));
+  test('regvalue', sprintf "0x%08x", (oct ($old) | (1<<9)));
+
+  $old = get('gusbcfg');
+  print("clearing hnpcapable\n");
+  set('hnpcapable', '0');
+  test("hnpcapable", "0x0");
+  test ('gusbcfg', sprintf "0x%08x", oct ($old) & (~(1<<9)));
+  test ('regvalue', sprintf "0x%08x", oct ($old) & (~(1<<9)));
+
+  # Test SRP Capable
+  print("\nTesting SRP Capable bit\n");
+  set('srpcapable', '1');
+  test("srpcapable", "0x1");
+  set('srpcapable','0');
+  test("srpcapable", "0x0");
+
+  set('regoffset','0c');
+
+  $old = get('gusbcfg');
+  print("setting srpcapable\n");
+  set('srpcapable', '1');
+  test("srpcapable", "0x1");
+  test('gusbcfg', sprintf "0x%08x", (oct ($old) | (1<<8)));
+  test('regvalue', sprintf "0x%08x", (oct ($old) | (1<<8)));
+
+  $old = get('gusbcfg');
+  print("clearing srpcapable\n");
+  set('srpcapable', '0');
+  test("srpcapable", "0x0");
+  test('gusbcfg', sprintf "0x%08x", oct ($old) & (~(1<<8)));
+  test('regvalue', sprintf "0x%08x", oct ($old) & (~(1<<8)));
+
+  # Test GGPIO
+  print("\nTesting GGPIO\n");
+  set('ggpio','5a5a5a5a');
+  test('ggpio','0x5a5a0000');
+  set('ggpio','a5a5a5a5');
+  test('ggpio','0xa5a50000');
+  set('ggpio','11110000');
+  test('ggpio','0x11110000');
+  set('ggpio','00001111');
+  test('ggpio','0x00000000');
+
+  # Test DEVSPEED
+  print("\nTesting DEVSPEED\n");
+  set('regoffset','800');
+  $old = get('regvalue');
+  set('devspeed','0');
+  test('devspeed','0x0');
+  test('regvalue',sprintf("0x%08x", oct($old) & ~(0x3)));
+  set('devspeed','1');
+  test('devspeed','0x1');
+  test('regvalue',sprintf("0x%08x", oct($old) & ~(0x3) | 1));
+  set('devspeed','2');
+  test('devspeed','0x2');
+  test('regvalue',sprintf("0x%08x", oct($old) & ~(0x3) | 2));
+  set('devspeed','3');
+  test('devspeed','0x3');
+  test('regvalue',sprintf("0x%08x", oct($old) & ~(0x3) | 3));
+  set('devspeed','4');
+  test('devspeed','0x0');
+  test('regvalue',sprintf("0x%08x", oct($old) & ~(0x3)));
+  set('devspeed','5');
+  test('devspeed','0x1');
+  test('regvalue',sprintf("0x%08x", oct($old) & ~(0x3) | 1));
+
+
+  #  mode      Returns the current mode:0 for device mode1 for host mode       Read
+  #  hnp       Initiate the Host Negotiation Protocol.  Read returns the status.       Read/Write
+  #  srp       Initiate the Session Request Protocol.  Read returns the status.        Read/Write
+  #  buspower  Get or Set the Power State of the bus (0 - Off or 1 - On)       Read/Write
+  #  bussuspend        Suspend the USB bus.    Read/Write
+  #  busconnected      Get the connection status of the bus    Read
+
+  #  gotgctl   Get or set the Core Control Status Register.    Read/Write
+  ##  gusbcfg  Get or set the Core USB Configuration Register  Read/Write
+  #  grxfsiz   Get or set the Receive FIFO Size Register       Read/Write
+  #  gnptxfsiz Get or set the non-periodic Transmit Size Register      Read/Write
+  #  gpvndctl  Get or set the PHY Vendor Control Register      Read/Write
+  ##  ggpio    Get the value in the lower 16-bits of the General Purpose IO Register or Set the upper 16 bits. Read/Write
+  ##  guid     Get or set the value of the User ID Register    Read/Write
+  ##  gsnpsid  Get the value of the Synopsys ID Regester       Read
+  ##  devspeed Get or set the device speed setting in the DCFG register        Read/Write
+  #  enumspeed Gets the device enumeration Speed.      Read
+  #  hptxfsiz  Get the value of the Host Periodic Transmit FIFO        Read
+  #  hprt0     Get or Set the value in the Host Port Control and Status Register       Read/Write
+
+  test_status("TEST NYI") or die;
+}
+
+test_main();
+0;