target/linux/brcm47xx/patches-2.6.35/022-USB-Add-ehci-ssb-driver.patch

   1 From cb269cf1f97c316a5184080814a751687c72b718 Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Sun, 18 Jul 2010 21:29:40 +0200
   4 Subject: [PATCH 2/2] USB: Add ehci ssb driver
   5
   6 Support for the Sonics Silicon Backplane (SSB) attached Broadcom USB EHCI core.
   7
   8 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
   9 ---
  10  drivers/usb/host/Kconfig    |   13 ++
  11  drivers/usb/host/ehci-hcd.c |   23 ++++-
  12  drivers/usb/host/ehci-ssb.c |  258 +++++++++++++++++++++++++++++++++++++++++++
  13  3 files changed, 292 insertions(+), 2 deletions(-)
  14  create mode 100644 drivers/usb/host/ehci-ssb.c
  15
  16 --- a/drivers/usb/host/Kconfig
  17 +++ b/drivers/usb/host/Kconfig
  18 @@ -150,6 +150,19 @@ config USB_OXU210HP_HCD
  19           To compile this driver as a module, choose M here: the
  20           module will be called oxu210hp-hcd.
  21
  22 +config USB_EHCI_HCD_SSB
  23 +       bool "EHCI support for Broadcom SSB EHCI core"
  24 +       depends on USB_EHCI_HCD && (SSB = y || SSB = USB_EHCI_HCD) && EXPERIMENTAL
  25 +       default n
  26 +       ---help---
  27 +         Support for the Sonics Silicon Backplane (SSB) attached
  28 +         Broadcom USB EHCI core.
  29 +
  30 +         This device is present in some embedded devices with
  31 +         Broadcom based SSB bus.
  32 +
  33 +         If unsure, say N.
  34 +
  35  config USB_ISP116X_HCD
  36         tristate "ISP116X HCD support"
  37         depends on USB
  38 --- a/drivers/usb/host/ehci-hcd.c
  39 +++ b/drivers/usb/host/ehci-hcd.c
  40 @@ -1158,9 +1158,14 @@ MODULE_LICENSE ("GPL");
  41  #define        PLATFORM_DRIVER         ehci_atmel_driver
  42  #endif
  43
  44 +#ifdef CONFIG_USB_EHCI_HCD_SSB
  45 +#include "ehci-ssb.c"
  46 +#define SSB_EHCI_DRIVER                ssb_ehci_driver
  47 +#endif
  48 +
  49  #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
  50      !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
  51 -    !defined(XILINX_OF_PLATFORM_DRIVER)
  52 +    !defined(XILINX_OF_PLATFORM_DRIVER) && !defined(SSB_EHCI_DRIVER)
  53  #error "missing bus glue for ehci-hcd"
  54  #endif
  55
  56 @@ -1220,10 +1225,21 @@ static int __init ehci_hcd_init(void)
  57         if (retval < 0)
  58                 goto clean4;
  59  #endif
  60 +
  61 +#ifdef SSB_EHCI_DRIVER
  62 +       retval = ssb_driver_register(&SSB_EHCI_DRIVER);
  63 +       if (retval < 0)
  64 +               goto clean5;
  65 +#endif
  66 +
  67         return retval;
  68
  69 +#ifdef SSB_EHCI_DRIVER
  70 +       /* ssb_driver_unregister(&SSB_EHCI_DRIVER); */
  71 +clean5:
  72 +#endif
  73  #ifdef XILINX_OF_PLATFORM_DRIVER
  74 -       /* of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER); */
  75 +       of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER);
  76  clean4:
  77  #endif
  78  #ifdef OF_PLATFORM_DRIVER
  79 @@ -1254,6 +1270,9 @@ module_init(ehci_hcd_init);
  80
  81  static void __exit ehci_hcd_cleanup(void)
  82  {
  83 +#ifdef SSB_EHCI_DRIVER
  84 +       ssb_driver_unregister(&SSB_EHCI_DRIVER);
  85 +#endif
  86  #ifdef XILINX_OF_PLATFORM_DRIVER
  87         of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER);
  88  #endif
  89 --- /dev/null
  90 +++ b/drivers/usb/host/ehci-ssb.c
  91 @@ -0,0 +1,258 @@
  92 +/*
  93 + * Sonics Silicon Backplane
  94 + * Broadcom USB-core EHCI driver (SSB bus glue)
  95 + *
  96 + * Copyright 2007 Steven Brown <sbrown@cortland.com>
  97 + * Copyright 2010 Hauke Mehrtens <hauke@hauke-m.de>
  98 + *
  99 + * Derived from the OHCI-SSB driver
 100 + * Copyright 2007 Michael Buesch <mb@bu3sch.de>
 101 + *
 102 + * Derived from the EHCI-PCI driver
 103 + * Copyright (c) 2000-2004 by David Brownell
 104 + *
 105 + * Derived from the OHCI-PCI driver
 106 + * Copyright 1999 Roman Weissgaerber
 107 + * Copyright 2000-2002 David Brownell
 108 + * Copyright 1999 Linus Torvalds
 109 + * Copyright 1999 Gregory P. Smith
 110 + *
 111 + * Derived from the USBcore related parts of Broadcom-SB
 112 + * Copyright 2005 Broadcom Corporation
 113 + *
 114 + * Licensed under the GNU/GPL. See COPYING for details.
 115 + */
 116 +#include <linux/ssb/ssb.h>
 117 +
 118 +
 119 +struct ssb_ehci_device {
 120 +       struct ehci_hcd ehci; /* _must_ be at the beginning. */
 121 +};
 122 +
 123 +static inline
 124 +struct ssb_ehci_device *hcd_to_ssb_ehci(struct usb_hcd *hcd)
 125 +{
 126 +       return (struct ssb_ehci_device *)(hcd->hcd_priv);
 127 +}
 128 +
 129 +static int ssb_ehci_reset(struct usb_hcd *hcd)
 130 +{
 131 +       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 132 +       int err;
 133 +
 134 +       ehci->caps = hcd->regs;
 135 +       ehci->regs = hcd->regs +
 136 +               HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 137 +
 138 +       dbg_hcs_params(ehci, "reset");
 139 +       dbg_hcc_params(ehci, "reset");
 140 +
 141 +       ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 142 +
 143 +       err = ehci_halt(ehci);
 144 +
 145 +       if (err)
 146 +               return err;
 147 +
 148 +       err = ehci_init(hcd);
 149 +
 150 +       if (err)
 151 +               return err;
 152 +
 153 +       ehci_reset(ehci);
 154 +
 155 +       return err;
 156 +}
 157 +
 158 +static const struct hc_driver ssb_ehci_hc_driver = {
 159 +       .description            = "ssb-usb-ehci",
 160 +       .product_desc           = "SSB EHCI Controller",
 161 +       .hcd_priv_size          = sizeof(struct ssb_ehci_device),
 162 +
 163 +       .irq                    = ehci_irq,
 164 +       .flags                  = HCD_MEMORY | HCD_USB2,
 165 +
 166 +       .reset                  = ssb_ehci_reset,
 167 +       .start                  = ehci_run,
 168 +       .stop                   = ehci_stop,
 169 +       .shutdown               = ehci_shutdown,
 170 +
 171 +       .urb_enqueue            = ehci_urb_enqueue,
 172 +       .urb_dequeue            = ehci_urb_dequeue,
 173 +       .endpoint_disable       = ehci_endpoint_disable,
 174 +       .endpoint_reset         = ehci_endpoint_reset,
 175 +
 176 +       .get_frame_number       = ehci_get_frame,
 177 +
 178 +       .hub_status_data        = ehci_hub_status_data,
 179 +       .hub_control            = ehci_hub_control,
 180 +#if defined(CONFIG_PM)
 181 +       .bus_suspend            = ehci_bus_suspend,
 182 +       .bus_resume             = ehci_bus_resume,
 183 +#endif
 184 +       .relinquish_port        = ehci_relinquish_port,
 185 +       .port_handed_over       = ehci_port_handed_over,
 186 +
 187 +       .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 188 +};
 189 +
 190 +static void ssb_ehci_detach(struct ssb_device *dev)
 191 +{
 192 +       struct usb_hcd *hcd = ssb_get_drvdata(dev);
 193 +       if (hcd->driver->shutdown)
 194 +               hcd->driver->shutdown(hcd);
 195 +
 196 +       usb_remove_hcd(hcd);
 197 +       iounmap(hcd->regs);
 198 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 199 +       usb_put_hcd(hcd);
 200 +       ssb_device_disable(dev, 0);
 201 +}
 202 +
 203 +static int ssb_ehci_attach(struct ssb_device *dev)
 204 +{
 205 +       struct ssb_ehci_device *ehcidev;
 206 +       struct usb_hcd *hcd;
 207 +       int err = -ENOMEM;
 208 +       u32 tmp;
 209 +
 210 +       if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
 211 +           dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
 212 +               return -EOPNOTSUPP;
 213 +
 214 +       /*
 215 +        * USB 2.0 special considerations:
 216 +        *
 217 +        * 1. Since the core supports both ehci and EHCI functions, it must
 218 +        *    only be reset once.
 219 +        *
 220 +        * 2. In addition to the standard SSB reset sequence, the Host Control
 221 +        *    Register must be programmed to bring the USB core and various
 222 +        *    phy components out of reset.
 223 +        */
 224 +       ssb_device_enable(dev, 0);
 225 +       ssb_write32(dev, 0x200, 0x7ff);
 226 +
 227 +       /* Change Flush control reg */
 228 +       tmp = ssb_read32(dev, 0x400);
 229 +       tmp &= ~8;
 230 +       ssb_write32(dev, 0x400, tmp);
 231 +       tmp = ssb_read32(dev, 0x400);
 232 +
 233 +       /* Change Shim control reg */
 234 +       tmp = ssb_read32(dev, 0x304);
 235 +       tmp &= ~0x100;
 236 +       ssb_write32(dev, 0x304, tmp);
 237 +       tmp = ssb_read32(dev, 0x304);
 238 +
 239 +       udelay(1);
 240 +
 241 +       /* Work around for 5354 failures */
 242 +       if ((dev->id.revision == 2) && (dev->bus->chip_id == 0x5354)) {
 243 +               /* Change syn01 reg */
 244 +               tmp = 0x00fe00fe;
 245 +               ssb_write32(dev, 0x894, tmp);
 246 +
 247 +               /* Change syn03 reg */
 248 +               tmp = ssb_read32(dev, 0x89c);
 249 +               tmp |= 0x1;
 250 +               ssb_write32(dev, 0x89c, tmp);
 251 +       }
 252 +
 253 +       hcd = usb_create_hcd(&ssb_ehci_hc_driver, dev->dev,
 254 +                            dev_name(dev->dev));
 255 +       if (!hcd)
 256 +               goto err_dev_disable;
 257 +
 258 +       ehcidev = hcd_to_ssb_ehci(hcd);
 259 +       tmp = ssb_read32(dev, SSB_ADMATCH0);
 260 +       hcd->rsrc_start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */
 261 +       hcd->rsrc_len = 0x100; /* ehci reg block size */
 262 +       /*
 263 +        * start & size modified per sbutils.c
 264 +        */
 265 +       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 266 +       if (!hcd->regs)
 267 +               goto err_put_hcd;
 268 +       err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
 269 +       if (err)
 270 +               goto err_iounmap;
 271 +
 272 +       ssb_set_drvdata(dev, hcd);
 273 +
 274 +       return err;
 275 +
 276 +err_iounmap:
 277 +       iounmap(hcd->regs);
 278 +err_put_hcd:
 279 +       usb_put_hcd(hcd);
 280 +err_dev_disable:
 281 +       ssb_device_disable(dev, 0);
 282 +       return err;
 283 +}
 284 +
 285 +static int ssb_ehci_probe(struct ssb_device *dev,
 286 +               const struct ssb_device_id *id)
 287 +{
 288 +       int err;
 289 +       u16 chipid_top;
 290 +
 291 +       /* USBcores are only connected on embedded devices. */
 292 +       chipid_top = (dev->bus->chip_id & 0xFF00);
 293 +       if (chipid_top != 0x4700 && chipid_top != 0x5300)
 294 +               return -ENODEV;
 295 +
 296 +       /* TODO: Probably need checks here; is the core connected? */
 297 +
 298 +       if (usb_disabled())
 299 +               return -ENODEV;
 300 +
 301 +       err = ssb_ehci_attach(dev);
 302 +
 303 +       return err;
 304 +}
 305 +
 306 +static void ssb_ehci_remove(struct ssb_device *dev)
 307 +{
 308 +       ssb_ehci_detach(dev);
 309 +}
 310 +
 311 +#ifdef CONFIG_PM
 312 +
 313 +static int ssb_ehci_suspend(struct ssb_device *dev, pm_message_t state)
 314 +{
 315 +       ssb_device_disable(dev, 0);
 316 +
 317 +       return 0;
 318 +}
 319 +
 320 +static int ssb_ehci_resume(struct ssb_device *dev)
 321 +{
 322 +       struct usb_hcd *hcd = ssb_get_drvdata(dev);
 323 +       struct ssb_ehci_device *ehcidev = hcd_to_ssb_ehci(hcd);
 324 +
 325 +       ssb_device_enable(dev, 0);
 326 +
 327 +       ehci_finish_controller_resume(hcd);
 328 +       return 0;
 329 +}
 330 +
 331 +#else /* !CONFIG_PM */
 332 +#define ssb_ehci_suspend       NULL
 333 +#define ssb_ehci_resume        NULL
 334 +#endif /* CONFIG_PM */
 335 +
 336 +static const struct ssb_device_id ssb_ehci_table[] = {
 337 +       SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
 338 +       SSB_DEVTABLE_END
 339 +};
 340 +MODULE_DEVICE_TABLE(ssb, ssb_ehci_table);
 341 +
 342 +static struct ssb_driver ssb_ehci_driver = {
 343 +       .name           = KBUILD_MODNAME,
 344 +       .id_table       = ssb_ehci_table,
 345 +       .probe          = ssb_ehci_probe,
 346 +       .remove         = ssb_ehci_remove,
 347 +       .suspend        = ssb_ehci_suspend,
 348 +       .resume         = ssb_ehci_resume,
 349 +};