target/linux/brcm47xx/patches-3.0/022-USB-Add-ehci-ssb-driver.patch

   1 --- a/drivers/usb/host/Kconfig
   2 +++ b/drivers/usb/host/Kconfig
   3 @@ -230,6 +230,19 @@ config USB_OXU210HP_HCD
   4           To compile this driver as a module, choose M here: the
   5           module will be called oxu210hp-hcd.
   6
   7 +config USB_EHCI_HCD_SSB
   8 +       bool "EHCI support for Broadcom SSB EHCI core"
   9 +       depends on USB_EHCI_HCD && (SSB = y || SSB = USB_EHCI_HCD) && EXPERIMENTAL
  10 +       default n
  11 +       ---help---
  12 +         Support for the Sonics Silicon Backplane (SSB) attached
  13 +         Broadcom USB EHCI core.
  14 +
  15 +         This device is present in some embedded devices with
  16 +         Broadcom based SSB bus.
  17 +
  18 +         If unsure, say N.
  19 +
  20  config USB_ISP116X_HCD
  21         tristate "ISP116X HCD support"
  22         depends on USB
  23 --- a/drivers/usb/host/ehci-hcd.c
  24 +++ b/drivers/usb/host/ehci-hcd.c
  25 @@ -1312,9 +1312,14 @@ MODULE_LICENSE ("GPL");
  26  #define PLATFORM_DRIVER                ehci_grlib_driver
  27  #endif
  28
  29 +#ifdef CONFIG_USB_EHCI_HCD_SSB
  30 +#include "ehci-ssb.c"
  31 +#define SSB_EHCI_DRIVER                ssb_ehci_driver
  32 +#endif
  33 +
  34  #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
  35      !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
  36 -    !defined(XILINX_OF_PLATFORM_DRIVER)
  37 +    !defined(XILINX_OF_PLATFORM_DRIVER) && !defined(SSB_EHCI_DRIVER)
  38  #error "missing bus glue for ehci-hcd"
  39  #endif
  40
  41 @@ -1374,10 +1379,20 @@ static int __init ehci_hcd_init(void)
  42         if (retval < 0)
  43                 goto clean4;
  44  #endif
  45 +
  46 +#ifdef SSB_EHCI_DRIVER
  47 +       retval = ssb_driver_register(&SSB_EHCI_DRIVER);
  48 +       if (retval < 0)
  49 +               goto clean5;
  50 +#endif
  51         return retval;
  52
  53 +#ifdef SSB_EHCI_DRIVER
  54 +       /* ssb_driver_unregister(&SSB_EHCI_DRIVER); */
  55 +clean5:
  56 +#endif
  57  #ifdef XILINX_OF_PLATFORM_DRIVER
  58 -       /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */
  59 +       platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
  60  clean4:
  61  #endif
  62  #ifdef OF_PLATFORM_DRIVER
  63 @@ -1408,6 +1423,9 @@ module_init(ehci_hcd_init);
  64
  65  static void __exit ehci_hcd_cleanup(void)
  66  {
  67 +#ifdef SSB_EHCI_DRIVER
  68 +       ssb_driver_unregister(&SSB_EHCI_DRIVER);
  69 +#endif
  70  #ifdef XILINX_OF_PLATFORM_DRIVER
  71         platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
  72  #endif
  73 --- /dev/null
  74 +++ b/drivers/usb/host/ehci-ssb.c
  75 @@ -0,0 +1,255 @@
  76 +/*
  77 + * Sonics Silicon Backplane
  78 + * Broadcom USB-core EHCI driver (SSB bus glue)
  79 + *
  80 + * Copyright 2007 Steven Brown <sbrown@cortland.com>
  81 + * Copyright 2010 Hauke Mehrtens <hauke@hauke-m.de>
  82 + *
  83 + * Derived from the OHCI-SSB driver
  84 + * Copyright 2007 Michael Buesch <mb@bu3sch.de>
  85 + *
  86 + * Derived from the EHCI-PCI driver
  87 + * Copyright (c) 2000-2004 by David Brownell
  88 + *
  89 + * Derived from the OHCI-PCI driver
  90 + * Copyright 1999 Roman Weissgaerber
  91 + * Copyright 2000-2002 David Brownell
  92 + * Copyright 1999 Linus Torvalds
  93 + * Copyright 1999 Gregory P. Smith
  94 + *
  95 + * Derived from the USBcore related parts of Broadcom-SB
  96 + * Copyright 2005 Broadcom Corporation
  97 + *
  98 + * Licensed under the GNU/GPL. See COPYING for details.
  99 + */
 100 +#include <linux/ssb/ssb.h>
 101 +
 102 +
 103 +struct ssb_ehci_device {
 104 +       struct ehci_hcd ehci; /* _must_ be at the beginning. */
 105 +};
 106 +
 107 +static inline
 108 +struct ssb_ehci_device *hcd_to_ssb_ehci(struct usb_hcd *hcd)
 109 +{
 110 +       return (struct ssb_ehci_device *)(hcd->hcd_priv);
 111 +}
 112 +
 113 +static int ssb_ehci_reset(struct usb_hcd *hcd)
 114 +{
 115 +       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 116 +       int err;
 117 +
 118 +       ehci->caps = hcd->regs;
 119 +       ehci->regs = hcd->regs +
 120 +               HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 121 +
 122 +       dbg_hcs_params(ehci, "reset");
 123 +       dbg_hcc_params(ehci, "reset");
 124 +
 125 +       ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 126 +
 127 +       err = ehci_halt(ehci);
 128 +
 129 +       if (err)
 130 +               return err;
 131 +
 132 +       err = ehci_init(hcd);
 133 +
 134 +       if (err)
 135 +               return err;
 136 +
 137 +       ehci_reset(ehci);
 138 +
 139 +       return err;
 140 +}
 141 +
 142 +static const struct hc_driver ssb_ehci_hc_driver = {
 143 +       .description            = "ssb-usb-ehci",
 144 +       .product_desc           = "SSB EHCI Controller",
 145 +       .hcd_priv_size          = sizeof(struct ssb_ehci_device),
 146 +
 147 +       .irq                    = ehci_irq,
 148 +       .flags                  = HCD_MEMORY | HCD_USB2,
 149 +
 150 +       .reset                  = ssb_ehci_reset,
 151 +       .start                  = ehci_run,
 152 +       .stop                   = ehci_stop,
 153 +       .shutdown               = ehci_shutdown,
 154 +
 155 +       .urb_enqueue            = ehci_urb_enqueue,
 156 +       .urb_dequeue            = ehci_urb_dequeue,
 157 +       .endpoint_disable       = ehci_endpoint_disable,
 158 +       .endpoint_reset         = ehci_endpoint_reset,
 159 +
 160 +       .get_frame_number       = ehci_get_frame,
 161 +
 162 +       .hub_status_data        = ehci_hub_status_data,
 163 +       .hub_control            = ehci_hub_control,
 164 +#if defined(CONFIG_PM)
 165 +       .bus_suspend            = ehci_bus_suspend,
 166 +       .bus_resume             = ehci_bus_resume,
 167 +#endif
 168 +       .relinquish_port        = ehci_relinquish_port,
 169 +       .port_handed_over       = ehci_port_handed_over,
 170 +
 171 +       .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 172 +};
 173 +
 174 +static void ssb_ehci_detach(struct ssb_device *dev)
 175 +{
 176 +       struct usb_hcd *hcd = ssb_get_drvdata(dev);
 177 +
 178 +       if (hcd->driver->shutdown)
 179 +               hcd->driver->shutdown(hcd);
 180 +       usb_remove_hcd(hcd);
 181 +       iounmap(hcd->regs);
 182 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 183 +       usb_put_hcd(hcd);
 184 +       ssb_device_disable(dev, 0);
 185 +}
 186 +
 187 +static int ssb_ehci_attach(struct ssb_device *dev)
 188 +{
 189 +       struct ssb_ehci_device *ehcidev;
 190 +       struct usb_hcd *hcd;
 191 +       int err = -ENOMEM;
 192 +       u32 tmp;
 193 +
 194 +       if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
 195 +           dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
 196 +               return -EOPNOTSUPP;
 197 +
 198 +       /*
 199 +        * USB 2.0 special considerations:
 200 +        *
 201 +        * In addition to the standard SSB reset sequence, the Host Control
 202 +        * Register must be programmed to bring the USB core and various phy
 203 +        * components out of reset.
 204 +        */
 205 +       ssb_device_enable(dev, 0);
 206 +       ssb_write32(dev, 0x200, 0x7ff);
 207 +
 208 +       /* Change Flush control reg */
 209 +       tmp = ssb_read32(dev, 0x400);
 210 +       tmp &= ~8;
 211 +       ssb_write32(dev, 0x400, tmp);
 212 +       tmp = ssb_read32(dev, 0x400);
 213 +
 214 +       /* Change Shim control reg */
 215 +       tmp = ssb_read32(dev, 0x304);
 216 +       tmp &= ~0x100;
 217 +       ssb_write32(dev, 0x304, tmp);
 218 +       tmp = ssb_read32(dev, 0x304);
 219 +
 220 +       udelay(1);
 221 +
 222 +       /* Work around for 5354 failures */
 223 +       if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) {
 224 +               /* Change syn01 reg */
 225 +               tmp = 0x00fe00fe;
 226 +               ssb_write32(dev, 0x894, tmp);
 227 +
 228 +               /* Change syn03 reg */
 229 +               tmp = ssb_read32(dev, 0x89c);
 230 +               tmp |= 0x1;
 231 +               ssb_write32(dev, 0x89c, tmp);
 232 +       }
 233 +
 234 +       hcd = usb_create_hcd(&ssb_ehci_hc_driver, dev->dev,
 235 +                            dev_name(dev->dev));
 236 +       if (!hcd)
 237 +               goto err_dev_disable;
 238 +
 239 +       ehcidev = hcd_to_ssb_ehci(hcd);
 240 +       tmp = ssb_read32(dev, SSB_ADMATCH0);
 241 +       hcd->rsrc_start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */
 242 +       hcd->rsrc_len = 0x100; /* ehci reg block size */
 243 +       /*
 244 +        * start & size modified per sbutils.c
 245 +        */
 246 +       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 247 +       if (!hcd->regs)
 248 +               goto err_put_hcd;
 249 +       err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
 250 +       if (err)
 251 +               goto err_iounmap;
 252 +
 253 +       ssb_set_drvdata(dev, hcd);
 254 +
 255 +       return err;
 256 +
 257 +err_iounmap:
 258 +       iounmap(hcd->regs);
 259 +err_put_hcd:
 260 +       usb_put_hcd(hcd);
 261 +err_dev_disable:
 262 +       ssb_device_disable(dev, 0);
 263 +       return err;
 264 +}
 265 +
 266 +static int ssb_ehci_probe(struct ssb_device *dev,
 267 +               const struct ssb_device_id *id)
 268 +{
 269 +       int err;
 270 +       u16 chipid_top;
 271 +
 272 +       /* USBcores are only connected on embedded devices. */
 273 +       chipid_top = (dev->bus->chip_id & 0xFF00);
 274 +       if (chipid_top != 0x4700 && chipid_top != 0x5300)
 275 +               return -ENODEV;
 276 +
 277 +       /* TODO: Probably need checks here; is the core connected? */
 278 +
 279 +       if (usb_disabled())
 280 +               return -ENODEV;
 281 +
 282 +       err = ssb_ehci_attach(dev);
 283 +
 284 +       return err;
 285 +}
 286 +
 287 +static void ssb_ehci_remove(struct ssb_device *dev)
 288 +{
 289 +       ssb_ehci_detach(dev);
 290 +}
 291 +
 292 +#ifdef CONFIG_PM
 293 +
 294 +static int ssb_ehci_suspend(struct ssb_device *dev, pm_message_t state)
 295 +{
 296 +       ssb_device_disable(dev, 0);
 297 +
 298 +       return 0;
 299 +}
 300 +
 301 +static int ssb_ehci_resume(struct ssb_device *dev)
 302 +{
 303 +       struct usb_hcd *hcd = ssb_get_drvdata(dev);
 304 +       struct ssb_ehci_device *ehcidev = hcd_to_ssb_ehci(hcd);
 305 +
 306 +       ssb_device_enable(dev, 0);
 307 +
 308 +       ehci_finish_controller_resume(hcd);
 309 +       return 0;
 310 +}
 311 +
 312 +#else /* !CONFIG_PM */
 313 +#define ssb_ehci_suspend       NULL
 314 +#define ssb_ehci_resume        NULL
 315 +#endif /* CONFIG_PM */
 316 +
 317 +static const struct ssb_device_id ssb_ehci_table[] = {
 318 +       SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
 319 +       SSB_DEVTABLE_END
 320 +};
 321 +MODULE_DEVICE_TABLE(ssb, ssb_ehci_table);
 322 +
 323 +static struct ssb_driver ssb_ehci_driver = {
 324 +       .name           = KBUILD_MODNAME,
 325 +       .id_table       = ssb_ehci_table,
 326 +       .probe          = ssb_ehci_probe,
 327 +       .remove         = ssb_ehci_remove,
 328 +       .suspend        = ssb_ehci_suspend,
 329 +       .resume         = ssb_ehci_resume,
 330 +};