--- /dev/null
+From ad224c0d5fa0fc05f8aaef3c19fc9b4eb275a5d2 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun, 18 Jul 2010 21:29:40 +0200
+Subject: [PATCH 2/2] USB: Add ehci ssb driver
+
+Support for the Sonics Silicon Backplane (SSB) attached Broadcom USB EHCI core.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ drivers/usb/host/Kconfig | 13 ++
+ drivers/usb/host/ehci-hcd.c | 22 ++++-
+ drivers/usb/host/ehci-ssb.c | 255 +++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 288 insertions(+), 2 deletions(-)
+ create mode 100644 drivers/usb/host/ehci-ssb.c
+
+--- a/drivers/usb/host/Kconfig
++++ b/drivers/usb/host/Kconfig
+@@ -153,6 +153,19 @@ config USB_OXU210HP_HCD
+ To compile this driver as a module, choose M here: the
+ module will be called oxu210hp-hcd.
+
++config USB_EHCI_HCD_SSB
++ bool "EHCI support for Broadcom SSB EHCI core"
++ depends on USB_EHCI_HCD && (SSB = y || SSB = USB_EHCI_HCD) && EXPERIMENTAL
++ default n
++ ---help---
++ Support for the Sonics Silicon Backplane (SSB) attached
++ Broadcom USB EHCI core.
++
++ This device is present in some embedded devices with
++ Broadcom based SSB bus.
++
++ If unsure, say N.
++
+ config USB_ISP116X_HCD
+ tristate "ISP116X HCD support"
+ depends on USB
+--- a/drivers/usb/host/ehci-hcd.c
++++ b/drivers/usb/host/ehci-hcd.c
+@@ -1197,9 +1197,14 @@ MODULE_LICENSE ("GPL");
+ #define PLATFORM_DRIVER ehci_atmel_driver
+ #endif
+
++#ifdef CONFIG_USB_EHCI_HCD_SSB
++#include "ehci-ssb.c"
++#define SSB_EHCI_DRIVER ssb_ehci_driver
++#endif
++
+ #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
+ !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
+- !defined(XILINX_OF_PLATFORM_DRIVER)
++ !defined(XILINX_OF_PLATFORM_DRIVER) && !defined(SSB_EHCI_DRIVER)
+ #error "missing bus glue for ehci-hcd"
+ #endif
+
+@@ -1259,10 +1264,20 @@ static int __init ehci_hcd_init(void)
+ if (retval < 0)
+ goto clean4;
+ #endif
++
++#ifdef SSB_EHCI_DRIVER
++ retval = ssb_driver_register(&SSB_EHCI_DRIVER);
++ if (retval < 0)
++ goto clean5;
++#endif
+ return retval;
+
++#ifdef SSB_EHCI_DRIVER
++ /* ssb_driver_unregister(&SSB_EHCI_DRIVER); */
++clean5:
++#endif
+ #ifdef XILINX_OF_PLATFORM_DRIVER
+- /* of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER); */
++ of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER);
+ clean4:
+ #endif
+ #ifdef OF_PLATFORM_DRIVER
+@@ -1293,6 +1308,9 @@ module_init(ehci_hcd_init);
+
+ static void __exit ehci_hcd_cleanup(void)
+ {
++#ifdef SSB_EHCI_DRIVER
++ ssb_driver_unregister(&SSB_EHCI_DRIVER);
++#endif
+ #ifdef XILINX_OF_PLATFORM_DRIVER
+ of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER);
+ #endif
+--- /dev/null
++++ b/drivers/usb/host/ehci-ssb.c
+@@ -0,0 +1,255 @@
++/*
++ * Sonics Silicon Backplane
++ * Broadcom USB-core EHCI driver (SSB bus glue)
++ *
++ * Copyright 2007 Steven Brown <sbrown@cortland.com>
++ * Copyright 2010 Hauke Mehrtens <hauke@hauke-m.de>
++ *
++ * Derived from the OHCI-SSB driver
++ * Copyright 2007 Michael Buesch <mb@bu3sch.de>
++ *
++ * Derived from the EHCI-PCI driver
++ * Copyright (c) 2000-2004 by David Brownell
++ *
++ * Derived from the OHCI-PCI driver
++ * Copyright 1999 Roman Weissgaerber
++ * Copyright 2000-2002 David Brownell
++ * Copyright 1999 Linus Torvalds
++ * Copyright 1999 Gregory P. Smith
++ *
++ * Derived from the USBcore related parts of Broadcom-SB
++ * Copyright 2005 Broadcom Corporation
++ *
++ * Licensed under the GNU/GPL. See COPYING for details.
++ */
++#include <linux/ssb/ssb.h>
++
++
++struct ssb_ehci_device {
++ struct ehci_hcd ehci; /* _must_ be at the beginning. */
++};
++
++static inline
++struct ssb_ehci_device *hcd_to_ssb_ehci(struct usb_hcd *hcd)
++{
++ return (struct ssb_ehci_device *)(hcd->hcd_priv);
++}
++
++static int ssb_ehci_reset(struct usb_hcd *hcd)
++{
++ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
++ int err;
++
++ ehci->caps = hcd->regs;
++ ehci->regs = hcd->regs +
++ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
++
++ dbg_hcs_params(ehci, "reset");
++ dbg_hcc_params(ehci, "reset");
++
++ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
++
++ err = ehci_halt(ehci);
++
++ if (err)
++ return err;
++
++ err = ehci_init(hcd);
++
++ if (err)
++ return err;
++
++ ehci_reset(ehci);
++
++ return err;
++}
++
++static const struct hc_driver ssb_ehci_hc_driver = {
++ .description = "ssb-usb-ehci",
++ .product_desc = "SSB EHCI Controller",
++ .hcd_priv_size = sizeof(struct ssb_ehci_device),
++
++ .irq = ehci_irq,
++ .flags = HCD_MEMORY | HCD_USB2,
++
++ .reset = ssb_ehci_reset,
++ .start = ehci_run,
++ .stop = ehci_stop,
++ .shutdown = ehci_shutdown,
++
++ .urb_enqueue = ehci_urb_enqueue,
++ .urb_dequeue = ehci_urb_dequeue,
++ .endpoint_disable = ehci_endpoint_disable,
++ .endpoint_reset = ehci_endpoint_reset,
++
++ .get_frame_number = ehci_get_frame,
++
++ .hub_status_data = ehci_hub_status_data,
++ .hub_control = ehci_hub_control,
++#if defined(CONFIG_PM)
++ .bus_suspend = ehci_bus_suspend,
++ .bus_resume = ehci_bus_resume,
++#endif
++ .relinquish_port = ehci_relinquish_port,
++ .port_handed_over = ehci_port_handed_over,
++
++ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
++};
++
++static void ssb_ehci_detach(struct ssb_device *dev)
++{
++ struct usb_hcd *hcd = ssb_get_drvdata(dev);
++
++ if (hcd->driver->shutdown)
++ hcd->driver->shutdown(hcd);
++ usb_remove_hcd(hcd);
++ iounmap(hcd->regs);
++ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
++ usb_put_hcd(hcd);
++ ssb_device_disable(dev, 0);
++}
++
++static int ssb_ehci_attach(struct ssb_device *dev)
++{
++ struct ssb_ehci_device *ehcidev;
++ struct usb_hcd *hcd;
++ int err = -ENOMEM;
++ u32 tmp;
++
++ if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
++ dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
++ return -EOPNOTSUPP;
++
++ /*
++ * USB 2.0 special considerations:
++ *
++ * In addition to the standard SSB reset sequence, the Host Control
++ * Register must be programmed to bring the USB core and various phy
++ * components out of reset.
++ */
++ ssb_device_enable(dev, 0);
++ ssb_write32(dev, 0x200, 0x7ff);
++
++ /* Change Flush control reg */
++ tmp = ssb_read32(dev, 0x400);
++ tmp &= ~8;
++ ssb_write32(dev, 0x400, tmp);
++ tmp = ssb_read32(dev, 0x400);
++
++ /* Change Shim control reg */
++ tmp = ssb_read32(dev, 0x304);
++ tmp &= ~0x100;
++ ssb_write32(dev, 0x304, tmp);
++ tmp = ssb_read32(dev, 0x304);
++
++ udelay(1);
++
++ /* Work around for 5354 failures */
++ if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) {
++ /* Change syn01 reg */
++ tmp = 0x00fe00fe;
++ ssb_write32(dev, 0x894, tmp);
++
++ /* Change syn03 reg */
++ tmp = ssb_read32(dev, 0x89c);
++ tmp |= 0x1;
++ ssb_write32(dev, 0x89c, tmp);
++ }
++
++ hcd = usb_create_hcd(&ssb_ehci_hc_driver, dev->dev,
++ dev_name(dev->dev));
++ if (!hcd)
++ goto err_dev_disable;
++
++ ehcidev = hcd_to_ssb_ehci(hcd);
++ tmp = ssb_read32(dev, SSB_ADMATCH0);
++ hcd->rsrc_start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */
++ hcd->rsrc_len = 0x100; /* ehci reg block size */
++ /*
++ * start & size modified per sbutils.c
++ */
++ hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
++ if (!hcd->regs)
++ goto err_put_hcd;
++ err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
++ if (err)
++ goto err_iounmap;
++
++ ssb_set_drvdata(dev, hcd);
++
++ return err;
++
++err_iounmap:
++ iounmap(hcd->regs);
++err_put_hcd:
++ usb_put_hcd(hcd);
++err_dev_disable:
++ ssb_device_disable(dev, 0);
++ return err;
++}
++
++static int ssb_ehci_probe(struct ssb_device *dev,
++ const struct ssb_device_id *id)
++{
++ int err;
++ u16 chipid_top;
++
++ /* USBcores are only connected on embedded devices. */
++ chipid_top = (dev->bus->chip_id & 0xFF00);
++ if (chipid_top != 0x4700 && chipid_top != 0x5300)
++ return -ENODEV;
++
++ /* TODO: Probably need checks here; is the core connected? */
++
++ if (usb_disabled())
++ return -ENODEV;
++
++ err = ssb_ehci_attach(dev);
++
++ return err;
++}
++
++static void ssb_ehci_remove(struct ssb_device *dev)
++{
++ ssb_ehci_detach(dev);
++}
++
++#ifdef CONFIG_PM
++
++static int ssb_ehci_suspend(struct ssb_device *dev, pm_message_t state)
++{
++ ssb_device_disable(dev, 0);
++
++ return 0;
++}
++
++static int ssb_ehci_resume(struct ssb_device *dev)
++{
++ struct usb_hcd *hcd = ssb_get_drvdata(dev);
++ struct ssb_ehci_device *ehcidev = hcd_to_ssb_ehci(hcd);
++
++ ssb_device_enable(dev, 0);
++
++ ehci_finish_controller_resume(hcd);
++ return 0;
++}
++
++#else /* !CONFIG_PM */
++#define ssb_ehci_suspend NULL
++#define ssb_ehci_resume NULL
++#endif /* CONFIG_PM */
++
++static const struct ssb_device_id ssb_ehci_table[] = {
++ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
++ SSB_DEVTABLE_END
++};
++MODULE_DEVICE_TABLE(ssb, ssb_ehci_table);
++
++static struct ssb_driver ssb_ehci_driver = {
++ .name = KBUILD_MODNAME,
++ .id_table = ssb_ehci_table,
++ .probe = ssb_ehci_probe,
++ .remove = ssb_ehci_remove,
++ .suspend = ssb_ehci_suspend,
++ .resume = ssb_ehci_resume,
++};
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