drivers/usb/host/ohci-pci.c

   1 /*
   2  * OHCI HCD (Host Controller Driver) for USB.
   3  *
   4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   5  * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
   6  *
   7  * [ Initialisation is based on Linus'  ]
   8  * [ uhci code and gregs ohci fragments ]
   9  * [ (C) Copyright 1999 Linus Torvalds  ]
  10  * [ (C) Copyright 1999 Gregory P. Smith]
  11  *
  12  * PCI Bus Glue
  13  *
  14  * This file is licenced under the GPL.
  15  */
  16
  17 #ifndef CONFIG_PCI
  18 #error "This file is PCI bus glue.  CONFIG_PCI must be defined."
  19 #endif
  20
  21 #include <linux/pci.h>
  22 #include <linux/io.h>
  23
  24
  25 /*-------------------------------------------------------------------------*/
  26
  27 static int broken_suspend(struct usb_hcd *hcd)
  28 {
  29         device_init_wakeup(&hcd->self.root_hub->dev, 0);
  30         return 0;
  31 }
  32
  33 /* AMD 756, for most chips (early revs), corrupts register
  34  * values on read ... so enable the vendor workaround.
  35  */
  36 static int ohci_quirk_amd756(struct usb_hcd *hcd)
  37 {
  38         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  39
  40         ohci->flags = OHCI_QUIRK_AMD756;
  41         ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
  42
  43         /* also erratum 10 (suspend/resume issues) */
  44         return broken_suspend(hcd);
  45 }
  46
  47 /* Apple's OHCI driver has a lot of bizarre workarounds
  48  * for this chip.  Evidently control and bulk lists
  49  * can get confused.  (B&W G3 models, and ...)
  50  */
  51 static int ohci_quirk_opti(struct usb_hcd *hcd)
  52 {
  53         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  54
  55         ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n");
  56
  57         return 0;
  58 }
  59
  60 /* Check for NSC87560. We have to look at the bridge (fn1) to
  61  * identify the USB (fn2). This quirk might apply to more or
  62  * even all NSC stuff.
  63  */
  64 static int ohci_quirk_ns(struct usb_hcd *hcd)
  65 {
  66         struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
  67         struct pci_dev  *b;
  68
  69         b  = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
  70         if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
  71             && b->vendor == PCI_VENDOR_ID_NS) {
  72                 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  73
  74                 ohci->flags |= OHCI_QUIRK_SUPERIO;
  75                 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
  76         }
  77         pci_dev_put(b);
  78
  79         return 0;
  80 }
  81
  82 /* Check for Compaq's ZFMicro chipset, which needs short
  83  * delays before control or bulk queues get re-activated
  84  * in finish_unlinks()
  85  */
  86 static int ohci_quirk_zfmicro(struct usb_hcd *hcd)
  87 {
  88         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  89
  90         ohci->flags |= OHCI_QUIRK_ZFMICRO;
  91         ohci_dbg(ohci, "enabled Compaq ZFMicro chipset quirks\n");
  92
  93         return 0;
  94 }
  95
  96 /* Check for Toshiba SCC OHCI which has big endian registers
  97  * and little endian in memory data structures
  98  */
  99 static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd)
 100 {
 101         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 102
 103         /* That chip is only present in the southbridge of some
 104          * cell based platforms which are supposed to select
 105          * CONFIG_USB_OHCI_BIG_ENDIAN_MMIO. We verify here if
 106          * that was the case though.
 107          */
 108 #ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
 109         ohci->flags |= OHCI_QUIRK_BE_MMIO;
 110         ohci_dbg (ohci, "enabled big endian Toshiba quirk\n");
 111         return 0;
 112 #else
 113         ohci_err (ohci, "unsupported big endian Toshiba quirk\n");
 114         return -ENXIO;
 115 #endif
 116 }
 117
 118 /* Check for NEC chip and apply quirk for allegedly lost interrupts.
 119  */
 120
 121 static void ohci_quirk_nec_worker(struct work_struct *work)
 122 {
 123         struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
 124         int status;
 125
 126         status = ohci_init(ohci);
 127         if (status != 0) {
 128                 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
 129                          "ohci_init", status);
 130                 return;
 131         }
 132
 133         status = ohci_restart(ohci);
 134         if (status != 0)
 135                 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
 136                          "ohci_restart", status);
 137 }
 138
 139 static int ohci_quirk_nec(struct usb_hcd *hcd)
 140 {
 141         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 142
 143         ohci->flags |= OHCI_QUIRK_NEC;
 144         INIT_WORK(&ohci->nec_work, ohci_quirk_nec_worker);
 145         ohci_dbg (ohci, "enabled NEC chipset lost interrupt quirk\n");
 146
 147         return 0;
 148 }
 149
 150 static int ohci_quirk_amd700(struct usb_hcd *hcd)
 151 {
 152         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 153         struct pci_dev *amd_smbus_dev;
 154         u8 rev = 0;
 155
 156         if (usb_amd_find_chipset_info())
 157                 ohci->flags |= OHCI_QUIRK_AMD_PLL;
 158
 159         amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
 160                         PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
 161         if (!amd_smbus_dev)
 162                 return 0;
 163
 164         pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
 165
 166         /* SB800 needs pre-fetch fix */
 167         if ((rev >= 0x40) && (rev <= 0x4f)) {
 168                 ohci->flags |= OHCI_QUIRK_AMD_PREFETCH;
 169                 ohci_dbg(ohci, "enabled AMD prefetch quirk\n");
 170         }
 171
 172         pci_dev_put(amd_smbus_dev);
 173         amd_smbus_dev = NULL;
 174
 175         return 0;
 176 }
 177
 178 /* nVidia controllers continue to drive Reset signalling on the bus
 179  * even after system shutdown, wasting power.  This flag tells the
 180  * shutdown routine to leave the controller OPERATIONAL instead of RESET.
 181  */
 182 static int ohci_quirk_nvidia_shutdown(struct usb_hcd *hcd)
 183 {
 184         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 185
 186         ohci->flags |= OHCI_QUIRK_SHUTDOWN;
 187         ohci_dbg(ohci, "enabled nVidia shutdown quirk\n");
 188
 189         return 0;
 190 }
 191
 192 static void sb800_prefetch(struct ohci_hcd *ohci, int on)
 193 {
 194         struct pci_dev *pdev;
 195         u16 misc;
 196
 197         pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
 198         pci_read_config_word(pdev, 0x50, &misc);
 199         if (on == 0)
 200                 pci_write_config_word(pdev, 0x50, misc & 0xfcff);
 201         else
 202                 pci_write_config_word(pdev, 0x50, misc | 0x0300);
 203 }
 204
 205 /* List of quirks for OHCI */
 206 static const struct pci_device_id ohci_pci_quirks[] = {
 207         {
 208                 PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c),
 209                 .driver_data = (unsigned long)ohci_quirk_amd756,
 210         },
 211         {
 212                 PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861),
 213                 .driver_data = (unsigned long)ohci_quirk_opti,
 214         },
 215         {
 216                 PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID),
 217                 .driver_data = (unsigned long)ohci_quirk_ns,
 218         },
 219         {
 220                 PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8),
 221                 .driver_data = (unsigned long)ohci_quirk_zfmicro,
 222         },
 223         {
 224                 PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6),
 225                 .driver_data = (unsigned long)ohci_quirk_toshiba_scc,
 226         },
 227         {
 228                 PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB),
 229                 .driver_data = (unsigned long)ohci_quirk_nec,
 230         },
 231         {
 232                 /* Toshiba portege 4000 */
 233                 .vendor         = PCI_VENDOR_ID_AL,
 234                 .device         = 0x5237,
 235                 .subvendor      = PCI_VENDOR_ID_TOSHIBA,
 236                 .subdevice      = 0x0004,
 237                 .driver_data    = (unsigned long) broken_suspend,
 238         },
 239         {
 240                 PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152),
 241                 .driver_data = (unsigned long) broken_suspend,
 242         },
 243         {
 244                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4397),
 245                 .driver_data = (unsigned long)ohci_quirk_amd700,
 246         },
 247         {
 248                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4398),
 249                 .driver_data = (unsigned long)ohci_quirk_amd700,
 250         },
 251         {
 252                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4399),
 253                 .driver_data = (unsigned long)ohci_quirk_amd700,
 254         },
 255         {
 256                 PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID),
 257                 .driver_data = (unsigned long) ohci_quirk_nvidia_shutdown,
 258         },
 259
 260         /* FIXME for some of the early AMD 760 southbridges, OHCI
 261          * won't work at all.  blacklist them.
 262          */
 263
 264         {},
 265 };
 266
 267 static int ohci_pci_reset (struct usb_hcd *hcd)
 268 {
 269         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 270         int ret = 0;
 271
 272         if (hcd->self.controller) {
 273                 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
 274                 const struct pci_device_id *quirk_id;
 275
 276                 quirk_id = pci_match_id(ohci_pci_quirks, pdev);
 277                 if (quirk_id != NULL) {
 278                         int (*quirk)(struct usb_hcd *ohci);
 279                         quirk = (void *)quirk_id->driver_data;
 280                         ret = quirk(hcd);
 281                 }
 282         }
 283         if (ret == 0) {
 284                 ohci_hcd_init (ohci);
 285                 return ohci_init (ohci);
 286         }
 287         return ret;
 288 }
 289
 290
 291 static int __devinit ohci_pci_start (struct usb_hcd *hcd)
 292 {
 293         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 294         int             ret;
 295
 296 #ifdef CONFIG_PM /* avoid warnings about unused pdev */
 297         if (hcd->self.controller) {
 298                 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
 299
 300                 /* RWC may not be set for add-in PCI cards, since boot
 301                  * firmware probably ignored them.  This transfers PCI
 302                  * PM wakeup capabilities.
 303                  */
 304                 if (device_can_wakeup(&pdev->dev))
 305                         ohci->hc_control |= OHCI_CTRL_RWC;
 306         }
 307 #endif /* CONFIG_PM */
 308
 309         ret = ohci_run (ohci);
 310         if (ret < 0) {
 311                 ohci_err (ohci, "can't start\n");
 312                 ohci_stop (hcd);
 313         }
 314         return ret;
 315 }
 316
 317 #ifdef  CONFIG_PM
 318
 319 static int ohci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
 320 {
 321         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 322         unsigned long   flags;
 323         int             rc = 0;
 324
 325         /* Root hub was already suspended. Disable irq emission and
 326          * mark HW unaccessible, bail out if RH has been resumed. Use
 327          * the spinlock to properly synchronize with possible pending
 328          * RH suspend or resume activity.
 329          *
 330          * This is still racy as hcd->state is manipulated outside of
 331          * any locks =P But that will be a different fix.
 332          */
 333         spin_lock_irqsave (&ohci->lock, flags);
 334         if (hcd->state != HC_STATE_SUSPENDED) {
 335                 rc = -EINVAL;
 336                 goto bail;
 337         }
 338         ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 339         (void)ohci_readl(ohci, &ohci->regs->intrdisable);
 340
 341         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 342  bail:
 343         spin_unlock_irqrestore (&ohci->lock, flags);
 344
 345         return rc;
 346 }
 347
 348
 349 static int ohci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 350 {
 351         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 352
 353         /* Make sure resume from hibernation re-enumerates everything */
 354         if (hibernated)
 355                 ohci_usb_reset(hcd_to_ohci(hcd));
 356
 357         ohci_finish_controller_resume(hcd);
 358         return 0;
 359 }
 360
 361 #endif  /* CONFIG_PM */
 362
 363
 364 /*-------------------------------------------------------------------------*/
 365
 366 static const struct hc_driver ohci_pci_hc_driver = {
 367         .description =          hcd_name,
 368         .product_desc =         "OHCI Host Controller",
 369         .hcd_priv_size =        sizeof(struct ohci_hcd),
 370
 371         /*
 372          * generic hardware linkage
 373          */
 374         .irq =                  ohci_irq,
 375         .flags =                HCD_MEMORY | HCD_USB11,
 376
 377         /*
 378          * basic lifecycle operations
 379          */
 380         .reset =                ohci_pci_reset,
 381         .start =                ohci_pci_start,
 382         .stop =                 ohci_stop,
 383         .shutdown =             ohci_shutdown,
 384
 385 #ifdef  CONFIG_PM
 386         .pci_suspend =          ohci_pci_suspend,
 387         .pci_resume =           ohci_pci_resume,
 388 #endif
 389
 390         /*
 391          * managing i/o requests and associated device resources
 392          */
 393         .urb_enqueue =          ohci_urb_enqueue,
 394         .urb_dequeue =          ohci_urb_dequeue,
 395         .endpoint_disable =     ohci_endpoint_disable,
 396
 397         /*
 398          * scheduling support
 399          */
 400         .get_frame_number =     ohci_get_frame,
 401
 402         /*
 403          * root hub support
 404          */
 405         .hub_status_data =      ohci_hub_status_data,
 406         .hub_control =          ohci_hub_control,
 407 #ifdef  CONFIG_PM
 408         .bus_suspend =          ohci_bus_suspend,
 409         .bus_resume =           ohci_bus_resume,
 410 #endif
 411         .start_port_reset =     ohci_start_port_reset,
 412 };
 413
 414 /*-------------------------------------------------------------------------*/
 415
 416
 417 static const struct pci_device_id pci_ids [] = { {
 418         /* handle any USB OHCI controller */
 419         PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
 420         .driver_data =  (unsigned long) &ohci_pci_hc_driver,
 421         }, { /* end: all zeroes */ }
 422 };
 423 MODULE_DEVICE_TABLE (pci, pci_ids);
 424
 425 /* pci driver glue; this is a "new style" PCI driver module */
 426 static struct pci_driver ohci_pci_driver = {
 427         .name =         (char *) hcd_name,
 428         .id_table =     pci_ids,
 429
 430         .probe =        usb_hcd_pci_probe,
 431         .remove =       usb_hcd_pci_remove,
 432         .shutdown =     usb_hcd_pci_shutdown,
 433
 434 #ifdef CONFIG_PM_SLEEP
 435         .driver =       {
 436                 .pm =   &usb_hcd_pci_pm_ops
 437         },
 438 #endif
 439 };