1 /* ==========================================================================
2 * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_queue.c $
7 * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
8 * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
9 * otherwise expressly agreed to in writing between Synopsys and you.
11 * The Software IS NOT an item of Licensed Software or Licensed Product under
12 * any End User Software License Agreement or Agreement for Licensed Product
13 * with Synopsys or any supplement thereto. You are permitted to use and
14 * redistribute this Software in source and binary forms, with or without
15 * modification, provided that redistributions of source code must retain this
16 * notice. You may not view, use, disclose, copy or distribute this file or
17 * any information contained herein except pursuant to this license grant from
18 * Synopsys. If you do not agree with this notice, including the disclaimer
19 * below, then you are not authorized to use the Software.
21 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
32 * ========================================================================== */
33 #ifndef DWC_DEVICE_ONLY
38 * This file contains the functions to manage Queue Heads and Queue
39 * Transfer Descriptors.
41 #include <linux/kernel.h>
42 #include <linux/module.h>
43 #include <linux/moduleparam.h>
44 #include <linux/init.h>
45 #include <linux/device.h>
46 #include <linux/errno.h>
47 #include <linux/list.h>
48 #include <linux/interrupt.h>
49 #include <linux/string.h>
50 #include <linux/version.h>
52 #include <mach/irqs.h>
54 #include "otg_driver.h"
59 * This function allocates and initializes a QH.
61 * @param hcd The HCD state structure for the DWC OTG controller.
62 * @param[in] urb Holds the information about the device/endpoint that we need
63 * to initialize the QH.
65 * @return Returns pointer to the newly allocated QH, or NULL on error. */
66 dwc_otg_qh_t
*dwc_otg_hcd_qh_create (dwc_otg_hcd_t
*hcd
, struct urb
*urb
)
71 /** @todo add memflags argument */
72 qh
= dwc_otg_hcd_qh_alloc ();
77 dwc_otg_hcd_qh_init (hcd
, qh
, urb
);
81 /** Free each QTD in the QH's QTD-list then free the QH. QH should already be
82 * removed from a list. QTD list should already be empty if called from URB
85 * @param[in] hcd HCD instance.
86 * @param[in] qh The QH to free.
88 void dwc_otg_hcd_qh_free (dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
)
91 struct list_head
*pos
;
92 //unsigned long flags;
94 /* Free each QTD in the QTD list */
97 //the spinlock is locked before this function get called,
98 //but in case the lock is needed, the check function is preserved
100 //but in non-SMP mode, all spinlock is lockable.
101 //don't do the test in non-SMP mode
103 if(spin_trylock(&hcd
->lock
)) {
104 printk("%s: It is not supposed to be lockable!!\n",__func__
);
108 // SPIN_LOCK_IRQSAVE(&hcd->lock, flags)
109 for (pos
= qh
->qtd_list
.next
;
110 pos
!= &qh
->qtd_list
;
111 pos
= qh
->qtd_list
.next
)
114 qtd
= dwc_list_to_qtd (pos
);
115 dwc_otg_hcd_qtd_free (qtd
);
117 // SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags)
123 /** Initializes a QH structure.
125 * @param[in] hcd The HCD state structure for the DWC OTG controller.
126 * @param[in] qh The QH to init.
127 * @param[in] urb Holds the information about the device/endpoint that we need
128 * to initialize the QH. */
129 #define SCHEDULE_SLOP 10
130 void dwc_otg_hcd_qh_init(dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
, struct urb
*urb
)
133 memset (qh
, 0, sizeof (dwc_otg_qh_t
));
136 switch (usb_pipetype(urb
->pipe
)) {
138 qh
->ep_type
= USB_ENDPOINT_XFER_CONTROL
;
141 qh
->ep_type
= USB_ENDPOINT_XFER_BULK
;
143 case PIPE_ISOCHRONOUS
:
144 qh
->ep_type
= USB_ENDPOINT_XFER_ISOC
;
147 qh
->ep_type
= USB_ENDPOINT_XFER_INT
;
151 qh
->ep_is_in
= usb_pipein(urb
->pipe
) ? 1 : 0;
153 qh
->data_toggle
= DWC_OTG_HC_PID_DATA0
;
154 qh
->maxp
= usb_maxpacket(urb
->dev
, urb
->pipe
, !(usb_pipein(urb
->pipe
)));
155 INIT_LIST_HEAD(&qh
->qtd_list
);
156 INIT_LIST_HEAD(&qh
->qh_list_entry
);
158 qh
->speed
= urb
->dev
->speed
;
160 /* FS/LS Enpoint on HS Hub
161 * NOT virtual root hub */
163 if (((urb
->dev
->speed
== USB_SPEED_LOW
) ||
164 (urb
->dev
->speed
== USB_SPEED_FULL
)) &&
165 (urb
->dev
->tt
) && (urb
->dev
->tt
->hub
) && (urb
->dev
->tt
->hub
->devnum
!= 1))
167 DWC_DEBUGPL(DBG_HCD
, "QH init: EP %d: TT found at hub addr %d, for port %d\n",
168 usb_pipeendpoint(urb
->pipe
), urb
->dev
->tt
->hub
->devnum
,
173 if (qh
->ep_type
== USB_ENDPOINT_XFER_INT
||
174 qh
->ep_type
== USB_ENDPOINT_XFER_ISOC
) {
175 /* Compute scheduling parameters once and save them. */
178 /** @todo Account for split transfers in the bus time. */
179 int bytecount
= dwc_hb_mult(qh
->maxp
) * dwc_max_packet(qh
->maxp
);
180 qh
->usecs
= NS_TO_US(usb_calc_bus_time(urb
->dev
->speed
,
181 usb_pipein(urb
->pipe
),
182 (qh
->ep_type
== USB_ENDPOINT_XFER_ISOC
),
185 /* Start in a slightly future (micro)frame. */
186 qh
->sched_frame
= dwc_frame_num_inc(hcd
->frame_number
,
188 qh
->interval
= urb
->interval
;
190 /* Increase interrupt polling rate for debugging. */
191 if (qh
->ep_type
== USB_ENDPOINT_XFER_INT
) {
195 hprt
.d32
= dwc_read_reg32(hcd
->core_if
->host_if
->hprt0
);
196 if ((hprt
.b
.prtspd
== DWC_HPRT0_PRTSPD_HIGH_SPEED
) &&
197 ((urb
->dev
->speed
== USB_SPEED_LOW
) ||
198 (urb
->dev
->speed
== USB_SPEED_FULL
))) {
200 qh
->sched_frame
|= 0x7;
201 qh
->start_split_frame
= qh
->sched_frame
;
206 DWC_DEBUGPL(DBG_HCD
, "DWC OTG HCD QH Initialized\n");
207 DWC_DEBUGPL(DBG_HCDV
, "DWC OTG HCD QH - qh = %p\n", qh
);
208 DWC_DEBUGPL(DBG_HCDV
, "DWC OTG HCD QH - Device Address = %d\n",
210 DWC_DEBUGPL(DBG_HCDV
, "DWC OTG HCD QH - Endpoint %d, %s\n",
211 usb_pipeendpoint(urb
->pipe
),
212 usb_pipein(urb
->pipe
) == USB_DIR_IN
? "IN" : "OUT");
214 qh
->nak_frame
= 0xffff;
216 switch(urb
->dev
->speed
) {
230 DWC_DEBUGPL(DBG_HCDV
, "DWC OTG HCD QH - Speed = %s\n", speed
);
232 switch (qh
->ep_type
) {
233 case USB_ENDPOINT_XFER_ISOC
:
234 type
= "isochronous";
236 case USB_ENDPOINT_XFER_INT
:
239 case USB_ENDPOINT_XFER_CONTROL
:
242 case USB_ENDPOINT_XFER_BULK
:
249 DWC_DEBUGPL(DBG_HCDV
, "DWC OTG HCD QH - Type = %s\n",type
);
252 if (qh
->ep_type
== USB_ENDPOINT_XFER_INT
) {
253 DWC_DEBUGPL(DBG_HCDV
, "DWC OTG HCD QH - usecs = %d\n",
255 DWC_DEBUGPL(DBG_HCDV
, "DWC OTG HCD QH - interval = %d\n",
264 * Microframe scheduler
265 * track the total use in hcd->frame_usecs
266 * keep each qh use in qh->frame_usecs
267 * when surrendering the qh then donate the time back
269 static const u16 max_uframe_usecs
[] = { 100, 100, 100, 100, 100, 100, 30, 0 };
272 * called from dwc_otg_hcd.c:dwc_otg_hcd_init
274 int init_hcd_usecs(dwc_otg_hcd_t
*hcd
)
278 for (i
= 0; i
< 8; i
++)
279 hcd
->frame_usecs
[i
] = max_uframe_usecs
[i
];
284 static int find_single_uframe(dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
)
298 /* At the start hcd->frame_usecs[i] = max_uframe_usecs[i]; */
299 if (utime
<= hcd
->frame_usecs
[i
]) {
300 hcd
->frame_usecs
[i
] -= utime
;
301 qh
->frame_usecs
[i
] += utime
;
318 * use this for FS apps that can span multiple uframes
320 static int find_multi_uframe(dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
)
337 if (hcd
->frame_usecs
[i
] <= 0) {
347 * We need n consequtive slots so use j as a start slot.
348 * j plus j+1 must be enough time (for now)
350 xtime
= hcd
->frame_usecs
[i
];
351 for (j
= i
+ 1; j
< 8; j
++) {
353 * if we add this frame remaining time to xtime we may
354 * be OK, if not we need to test j for a complete frame.
356 if ((xtime
+ hcd
->frame_usecs
[j
]) < utime
) {
357 if (hcd
->frame_usecs
[j
] < max_uframe_usecs
[j
]) {
363 if (xtime
>= utime
) {
365 j
= 8; /* stop loop with a good value ret */
368 /* add the frame time to x time */
369 xtime
+= hcd
->frame_usecs
[j
];
370 /* we must have a fully available next frame or break */
371 if ((xtime
< utime
) &&
372 (hcd
->frame_usecs
[j
] == max_uframe_usecs
[j
])) {
374 j
= 8; /* stop loop with a bad value ret */
380 for (j
= i
; (t_left
> 0) && (j
< 8); j
++) {
381 t_left
-= hcd
->frame_usecs
[j
];
383 qh
->frame_usecs
[j
] +=
384 hcd
->frame_usecs
[j
] + t_left
;
385 hcd
->frame_usecs
[j
] = -t_left
;
389 qh
->frame_usecs
[j
] +=
391 hcd
->frame_usecs
[j
] = 0;
405 static int find_uframe(dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
)
409 if (qh
->speed
== USB_SPEED_HIGH
)
410 /* if this is a hs transaction we need a full frame */
411 ret
= find_single_uframe(hcd
, qh
);
413 /* FS transaction may need a sequence of frames */
414 ret
= find_multi_uframe(hcd
, qh
);
420 * Checks that the max transfer size allowed in a host channel is large enough
421 * to handle the maximum data transfer in a single (micro)frame for a periodic
424 * @param hcd The HCD state structure for the DWC OTG controller.
425 * @param qh QH for a periodic endpoint.
427 * @return 0 if successful, negative error code otherwise.
429 static int check_max_xfer_size(dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
)
432 uint32_t max_xfer_size
;
433 uint32_t max_channel_xfer_size
;
437 max_xfer_size
= dwc_max_packet(qh
->maxp
) * dwc_hb_mult(qh
->maxp
);
438 max_channel_xfer_size
= hcd
->core_if
->core_params
->max_transfer_size
;
440 if (max_xfer_size
> max_channel_xfer_size
) {
441 DWC_NOTICE("%s: Periodic xfer length %d > "
442 "max xfer length for channel %d\n",
443 __func__
, max_xfer_size
, max_channel_xfer_size
);
451 * Schedules an interrupt or isochronous transfer in the periodic schedule.
453 static int schedule_periodic(dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
)
456 struct usb_bus
*bus
= hcd_to_bus(dwc_otg_hcd_to_hcd(hcd
));
460 num_channels
= hcd
->core_if
->core_params
->host_channels
;
462 if ((hcd
->periodic_channels
< num_channels
- 1)) {
463 if (hcd
->periodic_channels
+ hcd
->nakking_channels
>= num_channels
) {
464 /* All non-periodic channels are nakking? Halt
465 * one to make room (as long as there is at
466 * least one channel for non-periodic transfers,
467 * all the blocking non-periodics can time-share
468 * that one channel. */
469 dwc_hc_t
*hc
= dwc_otg_halt_nakking_channel(hcd
);
471 DWC_DEBUGPL(DBG_HCD
, "Out of Host Channels for periodic transfer - Halting channel %d (dev %d ep%d%s)\n", hc
->hc_num
, hc
->dev_addr
, hc
->ep_num
, (hc
->ep_is_in
? "in" : "out"));
473 /* It could be that all channels are currently occupied,
474 * but in that case one will be freed up soon (either
475 * because it completed or because it was forced to halt
478 status
= find_uframe(hcd
, qh
);
486 /* Set the new frame up */
488 qh
->sched_frame
&= ~0x7;
489 qh
->sched_frame
|= (frame
& 7);
494 pr_notice("%s: Insufficient periodic bandwidth for "
495 "periodic transfer.\n", __func__
);
498 status
= check_max_xfer_size(hcd
, qh
);
500 pr_notice("%s: Channel max transfer size too small "
501 "for periodic transfer.\n", __func__
);
504 /* Always start in the inactive schedule. */
505 list_add_tail(&qh
->qh_list_entry
, &hcd
->periodic_sched_inactive
);
507 hcd
->periodic_channels
++;
509 /* Update claimed usecs per (micro)frame. */
510 hcd
->periodic_usecs
+= qh
->usecs
;
513 * Update average periodic bandwidth claimed and # periodic reqs for
516 bus
->bandwidth_allocated
+= qh
->usecs
/ qh
->interval
;
518 if (qh
->ep_type
== USB_ENDPOINT_XFER_INT
)
519 bus
->bandwidth_int_reqs
++;
521 bus
->bandwidth_isoc_reqs
++;
527 * This function adds a QH to either the non periodic or periodic schedule if
528 * it is not already in the schedule. If the QH is already in the schedule, no
531 * @return 0 if successful, negative error code otherwise.
533 int dwc_otg_hcd_qh_add (dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
)
535 //unsigned long flags;
539 //the spinlock is locked before this function get called,
540 //but in case the lock is needed, the check function is preserved
541 //but in non-SMP mode, all spinlock is lockable.
542 //don't do the test in non-SMP mode
544 if(spin_trylock(&hcd
->lock
)) {
545 printk("%s: It is not supposed to be lockable!!\n",__func__
);
549 // SPIN_LOCK_IRQSAVE(&hcd->lock, flags)
551 if (!list_empty(&qh
->qh_list_entry
)) {
552 /* QH already in a schedule. */
556 /* Add the new QH to the appropriate schedule */
557 if (dwc_qh_is_non_per(qh
)) {
558 /* Always start in the inactive schedule. */
559 list_add_tail(&qh
->qh_list_entry
, &hcd
->non_periodic_sched_inactive
);
561 status
= schedule_periodic(hcd
, qh
);
565 // SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags)
571 * Removes an interrupt or isochronous transfer from the periodic schedule.
573 static void deschedule_periodic(dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
)
575 struct usb_bus
*bus
= hcd_to_bus(dwc_otg_hcd_to_hcd(hcd
));
578 list_del_init(&qh
->qh_list_entry
);
580 hcd
->periodic_channels
--;
582 /* Update claimed usecs per (micro)frame. */
583 hcd
->periodic_usecs
-= qh
->usecs
;
584 for (i
= 0; i
< 8; i
++) {
585 hcd
->frame_usecs
[i
] += qh
->frame_usecs
[i
];
586 qh
->frame_usecs
[i
] = 0;
589 * Update average periodic bandwidth claimed and # periodic reqs for
592 bus
->bandwidth_allocated
-= qh
->usecs
/ qh
->interval
;
594 if (qh
->ep_type
== USB_ENDPOINT_XFER_INT
)
595 bus
->bandwidth_int_reqs
--;
597 bus
->bandwidth_isoc_reqs
--;
601 * Removes a QH from either the non-periodic or periodic schedule. Memory is
604 * @param[in] hcd The HCD state structure.
605 * @param[in] qh QH to remove from schedule. */
606 void dwc_otg_hcd_qh_remove (dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
)
608 //unsigned long flags;
611 //the spinlock is locked before this function get called,
612 //but in case the lock is needed, the check function is preserved
613 //but in non-SMP mode, all spinlock is lockable.
614 //don't do the test in non-SMP mode
616 if(spin_trylock(&hcd
->lock
)) {
617 printk("%s: It is not supposed to be lockable!!\n",__func__
);
621 // SPIN_LOCK_IRQSAVE(&hcd->lock, flags);
623 if (list_empty(&qh
->qh_list_entry
)) {
624 /* QH is not in a schedule. */
628 if (dwc_qh_is_non_per(qh
)) {
629 if (hcd
->non_periodic_qh_ptr
== &qh
->qh_list_entry
) {
630 hcd
->non_periodic_qh_ptr
= hcd
->non_periodic_qh_ptr
->next
;
632 list_del_init(&qh
->qh_list_entry
);
634 deschedule_periodic(hcd
, qh
);
638 // SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags);
643 * Deactivates a QH. For non-periodic QHs, removes the QH from the active
644 * non-periodic schedule. The QH is added to the inactive non-periodic
645 * schedule if any QTDs are still attached to the QH.
647 * For periodic QHs, the QH is removed from the periodic queued schedule. If
648 * there are any QTDs still attached to the QH, the QH is added to either the
649 * periodic inactive schedule or the periodic ready schedule and its next
650 * scheduled frame is calculated. The QH is placed in the ready schedule if
651 * the scheduled frame has been reached already. Otherwise it's placed in the
652 * inactive schedule. If there are no QTDs attached to the QH, the QH is
653 * completely removed from the periodic schedule.
655 void dwc_otg_hcd_qh_deactivate(dwc_otg_hcd_t
*hcd
, dwc_otg_qh_t
*qh
, int sched_next_periodic_split
)
657 if (dwc_qh_is_non_per(qh
)) {
658 dwc_otg_hcd_qh_remove(hcd
, qh
);
659 if (!list_empty(&qh
->qtd_list
)) {
660 /* Add back to inactive non-periodic schedule. */
661 dwc_otg_hcd_qh_add(hcd
, qh
);
664 uint16_t frame_number
= dwc_otg_hcd_get_frame_number(dwc_otg_hcd_to_hcd(hcd
));
667 /* Schedule the next continuing periodic split transfer */
668 if (sched_next_periodic_split
) {
670 qh
->sched_frame
= frame_number
;
671 if (dwc_frame_num_le(frame_number
,
672 dwc_frame_num_inc(qh
->start_split_frame
, 1))) {
674 * Allow one frame to elapse after start
675 * split microframe before scheduling
676 * complete split, but DONT if we are
677 * doing the next start split in the
678 * same frame for an ISOC out.
680 if ((qh
->ep_type
!= USB_ENDPOINT_XFER_ISOC
) || (qh
->ep_is_in
!= 0)) {
681 qh
->sched_frame
= dwc_frame_num_inc(qh
->sched_frame
, 1);
685 qh
->sched_frame
= dwc_frame_num_inc(qh
->start_split_frame
,
687 if (dwc_frame_num_le(qh
->sched_frame
, frame_number
)) {
688 qh
->sched_frame
= frame_number
;
690 qh
->sched_frame
|= 0x7;
691 qh
->start_split_frame
= qh
->sched_frame
;
694 qh
->sched_frame
= dwc_frame_num_inc(qh
->sched_frame
, qh
->interval
);
695 if (dwc_frame_num_le(qh
->sched_frame
, frame_number
)) {
696 qh
->sched_frame
= frame_number
;
700 if (list_empty(&qh
->qtd_list
)) {
701 dwc_otg_hcd_qh_remove(hcd
, qh
);
704 * Remove from periodic_sched_queued and move to
707 if (qh
->sched_frame
== frame_number
) {
708 list_move(&qh
->qh_list_entry
,
709 &hcd
->periodic_sched_ready
);
711 list_move(&qh
->qh_list_entry
,
712 &hcd
->periodic_sched_inactive
);
719 * This function allocates and initializes a QTD.
721 * @param[in] urb The URB to create a QTD from. Each URB-QTD pair will end up
722 * pointing to each other so each pair should have a unique correlation.
724 * @return Returns pointer to the newly allocated QTD, or NULL on error. */
725 dwc_otg_qtd_t
*dwc_otg_hcd_qtd_create (struct urb
*urb
)
729 qtd
= dwc_otg_hcd_qtd_alloc ();
734 dwc_otg_hcd_qtd_init (qtd
, urb
);
739 * Initializes a QTD structure.
741 * @param[in] qtd The QTD to initialize.
742 * @param[in] urb The URB to use for initialization. */
743 void dwc_otg_hcd_qtd_init (dwc_otg_qtd_t
*qtd
, struct urb
*urb
)
745 memset (qtd
, 0, sizeof (dwc_otg_qtd_t
));
747 if (usb_pipecontrol(urb
->pipe
)) {
749 * The only time the QTD data toggle is used is on the data
750 * phase of control transfers. This phase always starts with
753 qtd
->data_toggle
= DWC_OTG_HC_PID_DATA1
;
754 qtd
->control_phase
= DWC_OTG_CONTROL_SETUP
;
758 qtd
->complete_split
= 0;
759 qtd
->isoc_split_pos
= DWC_HCSPLIT_XACTPOS_ALL
;
760 qtd
->isoc_split_offset
= 0;
762 /* Store the qtd ptr in the urb to reference what QTD. */
768 * This function adds a QTD to the QTD-list of a QH. It will find the correct
769 * QH to place the QTD into. If it does not find a QH, then it will create a
770 * new QH. If the QH to which the QTD is added is not currently scheduled, it
771 * is placed into the proper schedule based on its EP type.
773 * @param[in] qtd The QTD to add
774 * @param[in] dwc_otg_hcd The DWC HCD structure
776 * @return 0 if successful, negative error code otherwise.
778 int dwc_otg_hcd_qtd_add (dwc_otg_qtd_t
*qtd
,
779 dwc_otg_hcd_t
*dwc_otg_hcd
)
781 struct usb_host_endpoint
*ep
;
785 struct urb
*urb
= qtd
->urb
;
788 * Get the QH which holds the QTD-list to insert to. Create QH if it
791 usb_hcd_link_urb_to_ep(dwc_otg_hcd_to_hcd(dwc_otg_hcd
), urb
);
792 ep
= dwc_urb_to_endpoint(urb
);
793 qh
= (dwc_otg_qh_t
*)ep
->hcpriv
;
795 qh
= dwc_otg_hcd_qh_create (dwc_otg_hcd
, urb
);
797 usb_hcd_unlink_urb_from_ep(dwc_otg_hcd_to_hcd(dwc_otg_hcd
), urb
);
804 retval
= dwc_otg_hcd_qh_add(dwc_otg_hcd
, qh
);
806 list_add_tail(&qtd
->qtd_list_entry
, &qh
->qtd_list
);
808 usb_hcd_unlink_urb_from_ep(dwc_otg_hcd_to_hcd(dwc_otg_hcd
), urb
);
815 #endif /* DWC_DEVICE_ONLY */