target/linux/brcm47xx/patches-2.6.34/022-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 @@ -1159,8 +1159,14 @@ 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(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
  52 +    !defined(SSB_EHCI_DRIVER)
  53  #error "missing bus glue for ehci-hcd"
  54  #endif
  55
  56 @@ -1214,10 +1220,20 @@ static int __init ehci_hcd_init(void)
  57         if (retval < 0)
  58                 goto clean3;
  59  #endif
  60 +
  61 +#ifdef SSB_EHCI_DRIVER
  62 +       retval = ssb_driver_register(&SSB_EHCI_DRIVER);
  63 +       if (retval < 0)
  64 +               goto clean4;
  65 +#endif
  66         return retval;
  67
  68 +#ifdef SSB_EHCI_DRIVER
  69 +       /* ssb_driver_unregister(&SSB_EHCI_DRIVER); */
  70 +clean4:
  71 +#endif
  72  #ifdef OF_PLATFORM_DRIVER
  73 -       /* of_unregister_platform_driver(&OF_PLATFORM_DRIVER); */
  74 +       of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
  75  clean3:
  76  #endif
  77  #ifdef PS3_SYSTEM_BUS_DRIVER
  78 @@ -1256,6 +1272,9 @@ static void __exit ehci_hcd_cleanup(void
  79  #ifdef PS3_SYSTEM_BUS_DRIVER
  80         ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
  81  #endif
  82 +#ifdef SSB_EHCI_DRIVER
  83 +       ssb_driver_unregister(&SSB_EHCI_DRIVER);
  84 +#endif
  85  #ifdef DEBUG
  86         debugfs_remove(ehci_debug_root);
  87  #endif
  88 --- /dev/null
  89 +++ b/drivers/usb/host/ehci-ssb.c
  90 @@ -0,0 +1,258 @@
  91 +/*
  92 + * Sonics Silicon Backplane
  93 + * Broadcom USB-core EHCI driver (SSB bus glue)
  94 + *
  95 + * Copyright 2007 Steven Brown <sbrown@cortland.com>
  96 + * Copyright 2010 Hauke Mehrtens <hauke@hauke-m.de>
  97 + *
  98 + * Derived from the OHCI-SSB driver
  99 + * Copyright 2007 Michael Buesch <mb@bu3sch.de>
 100 + *
 101 + * Derived from the EHCI-PCI driver
 102 + * Copyright (c) 2000-2004 by David Brownell
 103 + *
 104 + * Derived from the OHCI-PCI driver
 105 + * Copyright 1999 Roman Weissgaerber
 106 + * Copyright 2000-2002 David Brownell
 107 + * Copyright 1999 Linus Torvalds
 108 + * Copyright 1999 Gregory P. Smith
 109 + *
 110 + * Derived from the USBcore related parts of Broadcom-SB
 111 + * Copyright 2005 Broadcom Corporation
 112 + *
 113 + * Licensed under the GNU/GPL. See COPYING for details.
 114 + */
 115 +#include <linux/ssb/ssb.h>
 116 +
 117 +
 118 +struct ssb_ehci_device {
 119 +       struct ehci_hcd ehci; /* _must_ be at the beginning. */
 120 +};
 121 +
 122 +static inline
 123 +struct ssb_ehci_device *hcd_to_ssb_ehci(struct usb_hcd *hcd)
 124 +{
 125 +       return (struct ssb_ehci_device *)(hcd->hcd_priv);
 126 +}
 127 +
 128 +static int ssb_ehci_reset(struct usb_hcd *hcd)
 129 +{
 130 +       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 131 +       int err;
 132 +
 133 +       ehci->caps = hcd->regs;
 134 +       ehci->regs = hcd->regs +
 135 +               HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 136 +
 137 +       dbg_hcs_params(ehci, "reset");
 138 +       dbg_hcc_params(ehci, "reset");
 139 +
 140 +       ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 141 +
 142 +       err = ehci_halt(ehci);
 143 +
 144 +       if (err)
 145 +               return err;
 146 +
 147 +       err = ehci_init(hcd);
 148 +
 149 +       if (err)
 150 +               return err;
 151 +
 152 +       ehci_reset(ehci);
 153 +
 154 +       return err;
 155 +}
 156 +
 157 +static const struct hc_driver ssb_ehci_hc_driver = {
 158 +       .description            = "ssb-usb-ehci",
 159 +       .product_desc           = "SSB EHCI Controller",
 160 +       .hcd_priv_size          = sizeof(struct ssb_ehci_device),
 161 +
 162 +       .irq                    = ehci_irq,
 163 +       .flags                  = HCD_MEMORY | HCD_USB2,
 164 +
 165 +       .reset                  = ssb_ehci_reset,
 166 +       .start                  = ehci_run,
 167 +       .stop                   = ehci_stop,
 168 +       .shutdown               = ehci_shutdown,
 169 +
 170 +       .urb_enqueue            = ehci_urb_enqueue,
 171 +       .urb_dequeue            = ehci_urb_dequeue,
 172 +       .endpoint_disable       = ehci_endpoint_disable,
 173 +       .endpoint_reset         = ehci_endpoint_reset,
 174 +
 175 +       .get_frame_number       = ehci_get_frame,
 176 +
 177 +       .hub_status_data        = ehci_hub_status_data,
 178 +       .hub_control            = ehci_hub_control,
 179 +#if defined(CONFIG_PM)
 180 +       .bus_suspend            = ehci_bus_suspend,
 181 +       .bus_resume             = ehci_bus_resume,
 182 +#endif
 183 +       .relinquish_port        = ehci_relinquish_port,
 184 +       .port_handed_over       = ehci_port_handed_over,
 185 +
 186 +       .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 187 +};
 188 +
 189 +static void ssb_ehci_detach(struct ssb_device *dev)
 190 +{
 191 +       struct usb_hcd *hcd = ssb_get_drvdata(dev);
 192 +       if (hcd->driver->shutdown)
 193 +               hcd->driver->shutdown(hcd);
 194 +
 195 +       usb_remove_hcd(hcd);
 196 +       iounmap(hcd->regs);
 197 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 198 +       usb_put_hcd(hcd);
 199 +       ssb_device_disable(dev, 0);
 200 +}
 201 +
 202 +static int ssb_ehci_attach(struct ssb_device *dev)
 203 +{
 204 +       struct ssb_ehci_device *ehcidev;
 205 +       struct usb_hcd *hcd;
 206 +       int err = -ENOMEM;
 207 +       u32 tmp;
 208 +
 209 +       if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
 210 +           dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
 211 +               return -EOPNOTSUPP;
 212 +
 213 +       /*
 214 +        * USB 2.0 special considerations:
 215 +        *
 216 +        * 1. Since the core supports both ehci and EHCI functions, it must
 217 +        *    only be reset once.
 218 +        *
 219 +        * 2. In addition to the standard SSB reset sequence, the Host Control
 220 +        *    Register must be programmed to bring the USB core and various
 221 +        *    phy components out of reset.
 222 +        */
 223 +       ssb_device_enable(dev, 0);
 224 +       ssb_write32(dev, 0x200, 0x7ff);
 225 +
 226 +       /* Change Flush control reg */
 227 +       tmp = ssb_read32(dev, 0x400);
 228 +       tmp &= ~8;
 229 +       ssb_write32(dev, 0x400, tmp);
 230 +       tmp = ssb_read32(dev, 0x400);
 231 +
 232 +       /* Change Shim control reg */
 233 +       tmp = ssb_read32(dev, 0x304);
 234 +       tmp &= ~0x100;
 235 +       ssb_write32(dev, 0x304, tmp);
 236 +       tmp = ssb_read32(dev, 0x304);
 237 +
 238 +       udelay(1);
 239 +
 240 +       /* Work around for 5354 failures */
 241 +       if ((dev->id.revision == 2) && (dev->bus->chip_id == 0x5354)) {
 242 +               /* Change syn01 reg */
 243 +               tmp = 0x00fe00fe;
 244 +               ssb_write32(dev, 0x894, tmp);
 245 +
 246 +               /* Change syn03 reg */
 247 +               tmp = ssb_read32(dev, 0x89c);
 248 +               tmp |= 0x1;
 249 +               ssb_write32(dev, 0x89c, tmp);
 250 +       }
 251 +
 252 +       hcd = usb_create_hcd(&ssb_ehci_hc_driver, dev->dev,
 253 +                            dev_name(dev->dev));
 254 +       if (!hcd)
 255 +               goto err_dev_disable;
 256 +
 257 +       ehcidev = hcd_to_ssb_ehci(hcd);
 258 +       tmp = ssb_read32(dev, SSB_ADMATCH0);
 259 +       hcd->rsrc_start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */
 260 +       hcd->rsrc_len = 0x100; /* ehci reg block size */
 261 +       /*
 262 +        * start & size modified per sbutils.c
 263 +        */
 264 +       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 265 +       if (!hcd->regs)
 266 +               goto err_put_hcd;
 267 +       err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
 268 +       if (err)
 269 +               goto err_iounmap;
 270 +
 271 +       ssb_set_drvdata(dev, hcd);
 272 +
 273 +       return err;
 274 +
 275 +err_iounmap:
 276 +       iounmap(hcd->regs);
 277 +err_put_hcd:
 278 +       usb_put_hcd(hcd);
 279 +err_dev_disable:
 280 +       ssb_device_disable(dev, 0);
 281 +       return err;
 282 +}
 283 +
 284 +static int ssb_ehci_probe(struct ssb_device *dev,
 285 +               const struct ssb_device_id *id)
 286 +{
 287 +       int err;
 288 +       u16 chipid_top;
 289 +
 290 +       /* USBcores are only connected on embedded devices. */
 291 +       chipid_top = (dev->bus->chip_id & 0xFF00);
 292 +       if (chipid_top != 0x4700 && chipid_top != 0x5300)
 293 +               return -ENODEV;
 294 +
 295 +       /* TODO: Probably need checks here; is the core connected? */
 296 +
 297 +       if (usb_disabled())
 298 +               return -ENODEV;
 299 +
 300 +       err = ssb_ehci_attach(dev);
 301 +
 302 +       return err;
 303 +}
 304 +
 305 +static void ssb_ehci_remove(struct ssb_device *dev)
 306 +{
 307 +       ssb_ehci_detach(dev);
 308 +}
 309 +
 310 +#ifdef CONFIG_PM
 311 +
 312 +static int ssb_ehci_suspend(struct ssb_device *dev, pm_message_t state)
 313 +{
 314 +       ssb_device_disable(dev, 0);
 315 +
 316 +       return 0;
 317 +}
 318 +
 319 +static int ssb_ehci_resume(struct ssb_device *dev)
 320 +{
 321 +       struct usb_hcd *hcd = ssb_get_drvdata(dev);
 322 +       struct ssb_ehci_device *ehcidev = hcd_to_ssb_ehci(hcd);
 323 +
 324 +       ssb_device_enable(dev, 0);
 325 +
 326 +       ehci_finish_controller_resume(hcd);
 327 +       return 0;
 328 +}
 329 +
 330 +#else /* !CONFIG_PM */
 331 +#define ssb_ehci_suspend       NULL
 332 +#define ssb_ehci_resume        NULL
 333 +#endif /* CONFIG_PM */
 334 +
 335 +static const struct ssb_device_id ssb_ehci_table[] = {
 336 +       SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
 337 +       SSB_DEVTABLE_END
 338 +};
 339 +MODULE_DEVICE_TABLE(ssb, ssb_ehci_table);
 340 +
 341 +static struct ssb_driver ssb_ehci_driver = {
 342 +       .name           = KBUILD_MODNAME,
 343 +       .id_table       = ssb_ehci_table,
 344 +       .probe          = ssb_ehci_probe,
 345 +       .remove         = ssb_ehci_remove,
 346 +       .suspend        = ssb_ehci_suspend,
 347 +       .resume         = ssb_ehci_resume,
 348 +};