git.oblomov.eu Git - linux-2.6/blob - drivers/usb/host/ohci-hcd.c

   1 /*
   2  * OHCI HCD (Host Controller Driver) for USB.
   3  *
   4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   5  * (C) Copyright 2000-2004 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  *
  13  * OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller
  14  * interfaces (though some non-x86 Intel chips use it).  It supports
  15  * smarter hardware than UHCI.  A download link for the spec available
  16  * through the http://www.usb.org website.
  17  *
  18  * This file is licenced under the GPL.
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/pci.h>
  24 #include <linux/kernel.h>
  25 #include <linux/delay.h>
  26 #include <linux/ioport.h>
  27 #include <linux/sched.h>
  28 #include <linux/slab.h>
  29 #include <linux/errno.h>
  30 #include <linux/init.h>
  31 #include <linux/timer.h>
  32 #include <linux/list.h>
  33 #include <linux/usb.h>
  34 #include <linux/usb/otg.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/dmapool.h>
  37 #include <linux/reboot.h>
  38 #include <linux/workqueue.h>
  39 #include <linux/debugfs.h>
  40
  41 #include <asm/io.h>
  42 #include <asm/irq.h>
  43 #include <asm/system.h>
  44 #include <asm/unaligned.h>
  45 #include <asm/byteorder.h>
  46
  47 #include "../core/hcd.h"
  48
  49 #define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
  50 #define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
  51
  52 /*-------------------------------------------------------------------------*/
  53
  54 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  55
  56 /* For initializing controller (mask in an HCFS mode too) */
  57 #define OHCI_CONTROL_INIT       OHCI_CTRL_CBSR
  58 #define OHCI_INTR_INIT \
  59                 (OHCI_INTR_MIE | OHCI_INTR_RHSC | OHCI_INTR_UE \
  60                 | OHCI_INTR_RD | OHCI_INTR_WDH)
  61
  62 #ifdef __hppa__
  63 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
  64 #define IR_DISABLE
  65 #endif
  66
  67 #ifdef CONFIG_ARCH_OMAP
  68 /* OMAP doesn't support IR (no SMM; not needed) */
  69 #define IR_DISABLE
  70 #endif
  71
  72 /*-------------------------------------------------------------------------*/
  73
  74 static const char       hcd_name [] = "ohci_hcd";
  75
  76 #define STATECHANGE_DELAY       msecs_to_jiffies(300)
  77
  78 #include "ohci.h"
  79
  80 static void ohci_dump (struct ohci_hcd *ohci, int verbose);
  81 static int ohci_init (struct ohci_hcd *ohci);
  82 static void ohci_stop (struct usb_hcd *hcd);
  83
  84 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
  85 static int ohci_restart (struct ohci_hcd *ohci);
  86 #endif
  87
  88 #ifdef CONFIG_PCI
  89 static void quirk_amd_pll(int state);
  90 static void amd_iso_dev_put(void);
  91 #else
  92 static inline void quirk_amd_pll(int state)
  93 {
  94         return;
  95 }
  96 static inline void amd_iso_dev_put(void)
  97 {
  98         return;
  99 }
 100 #endif
 101
 102
 103 #include "ohci-hub.c"
 104 #include "ohci-dbg.c"
 105 #include "ohci-mem.c"
 106 #include "ohci-q.c"
 107
 108
 109 /*
 110  * On architectures with edge-triggered interrupts we must never return
 111  * IRQ_NONE.
 112  */
 113 #if defined(CONFIG_SA1111)  /* ... or other edge-triggered systems */
 114 #define IRQ_NOTMINE     IRQ_HANDLED
 115 #else
 116 #define IRQ_NOTMINE     IRQ_NONE
 117 #endif
 118
 119
 120 /* Some boards misreport power switching/overcurrent */
 121 static int distrust_firmware = 1;
 122 module_param (distrust_firmware, bool, 0);
 123 MODULE_PARM_DESC (distrust_firmware,
 124         "true to distrust firmware power/overcurrent setup");
 125
 126 /* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */
 127 static int no_handshake = 0;
 128 module_param (no_handshake, bool, 0);
 129 MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
 130
 131 /*-------------------------------------------------------------------------*/
 132
 133 /*
 134  * queue up an urb for anything except the root hub
 135  */
 136 static int ohci_urb_enqueue (
 137         struct usb_hcd  *hcd,
 138         struct urb      *urb,
 139         gfp_t           mem_flags
 140 ) {
 141         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 142         struct ed       *ed;
 143         urb_priv_t      *urb_priv;
 144         unsigned int    pipe = urb->pipe;
 145         int             i, size = 0;
 146         unsigned long   flags;
 147         int             retval = 0;
 148
 149 #ifdef OHCI_VERBOSE_DEBUG
 150         urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
 151 #endif
 152
 153         /* every endpoint has a ed, locate and maybe (re)initialize it */
 154         if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
 155                 return -ENOMEM;
 156
 157         /* for the private part of the URB we need the number of TDs (size) */
 158         switch (ed->type) {
 159                 case PIPE_CONTROL:
 160                         /* td_submit_urb() doesn't yet handle these */
 161                         if (urb->transfer_buffer_length > 4096)
 162                                 return -EMSGSIZE;
 163
 164                         /* 1 TD for setup, 1 for ACK, plus ... */
 165                         size = 2;
 166                         /* FALLTHROUGH */
 167                 // case PIPE_INTERRUPT:
 168                 // case PIPE_BULK:
 169                 default:
 170                         /* one TD for every 4096 Bytes (can be upto 8K) */
 171                         size += urb->transfer_buffer_length / 4096;
 172                         /* ... and for any remaining bytes ... */
 173                         if ((urb->transfer_buffer_length % 4096) != 0)
 174                                 size++;
 175                         /* ... and maybe a zero length packet to wrap it up */
 176                         if (size == 0)
 177                                 size++;
 178                         else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
 179                                 && (urb->transfer_buffer_length
 180                                         % usb_maxpacket (urb->dev, pipe,
 181                                                 usb_pipeout (pipe))) == 0)
 182                                 size++;
 183                         break;
 184                 case PIPE_ISOCHRONOUS: /* number of packets from URB */
 185                         size = urb->number_of_packets;
 186                         break;
 187         }
 188
 189         /* allocate the private part of the URB */
 190         urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
 191                         mem_flags);
 192         if (!urb_priv)
 193                 return -ENOMEM;
 194         INIT_LIST_HEAD (&urb_priv->pending);
 195         urb_priv->length = size;
 196         urb_priv->ed = ed;
 197
 198         /* allocate the TDs (deferring hash chain updates) */
 199         for (i = 0; i < size; i++) {
 200                 urb_priv->td [i] = td_alloc (ohci, mem_flags);
 201                 if (!urb_priv->td [i]) {
 202                         urb_priv->length = i;
 203                         urb_free_priv (ohci, urb_priv);
 204                         return -ENOMEM;
 205                 }
 206         }
 207
 208         spin_lock_irqsave (&ohci->lock, flags);
 209
 210         /* don't submit to a dead HC */
 211         if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
 212                 retval = -ENODEV;
 213                 goto fail;
 214         }
 215         if (!HC_IS_RUNNING(hcd->state)) {
 216                 retval = -ENODEV;
 217                 goto fail;
 218         }
 219         retval = usb_hcd_link_urb_to_ep(hcd, urb);
 220         if (retval)
 221                 goto fail;
 222
 223         /* schedule the ed if needed */
 224         if (ed->state == ED_IDLE) {
 225                 retval = ed_schedule (ohci, ed);
 226                 if (retval < 0) {
 227                         usb_hcd_unlink_urb_from_ep(hcd, urb);
 228                         goto fail;
 229                 }
 230                 if (ed->type == PIPE_ISOCHRONOUS) {
 231                         u16     frame = ohci_frame_no(ohci);
 232
 233                         /* delay a few frames before the first TD */
 234                         frame += max_t (u16, 8, ed->interval);
 235                         frame &= ~(ed->interval - 1);
 236                         frame |= ed->branch;
 237                         urb->start_frame = frame;
 238
 239                         /* yes, only URB_ISO_ASAP is supported, and
 240                          * urb->start_frame is never used as input.
 241                          */
 242                 }
 243         } else if (ed->type == PIPE_ISOCHRONOUS)
 244                 urb->start_frame = ed->last_iso + ed->interval;
 245
 246         /* fill the TDs and link them to the ed; and
 247          * enable that part of the schedule, if needed
 248          * and update count of queued periodic urbs
 249          */
 250         urb->hcpriv = urb_priv;
 251         td_submit_urb (ohci, urb);
 252
 253 fail:
 254         if (retval)
 255                 urb_free_priv (ohci, urb_priv);
 256         spin_unlock_irqrestore (&ohci->lock, flags);
 257         return retval;
 258 }
 259
 260 /*
 261  * decouple the URB from the HC queues (TDs, urb_priv).
 262  * reporting is always done
 263  * asynchronously, and we might be dealing with an urb that's
 264  * partially transferred, or an ED with other urbs being unlinked.
 265  */
 266 static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 267 {
 268         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 269         unsigned long           flags;
 270         int                     rc;
 271
 272 #ifdef OHCI_VERBOSE_DEBUG
 273         urb_print(urb, "UNLINK", 1, status);
 274 #endif
 275
 276         spin_lock_irqsave (&ohci->lock, flags);
 277         rc = usb_hcd_check_unlink_urb(hcd, urb, status);
 278         if (rc) {
 279                 ;       /* Do nothing */
 280         } else if (HC_IS_RUNNING(hcd->state)) {
 281                 urb_priv_t  *urb_priv;
 282
 283                 /* Unless an IRQ completed the unlink while it was being
 284                  * handed to us, flag it for unlink and giveback, and force
 285                  * some upcoming INTR_SF to call finish_unlinks()
 286                  */
 287                 urb_priv = urb->hcpriv;
 288                 if (urb_priv) {
 289                         if (urb_priv->ed->state == ED_OPER)
 290                                 start_ed_unlink (ohci, urb_priv->ed);
 291                 }
 292         } else {
 293                 /*
 294                  * with HC dead, we won't respect hc queue pointers
 295                  * any more ... just clean up every urb's memory.
 296                  */
 297                 if (urb->hcpriv)
 298                         finish_urb(ohci, urb, status);
 299         }
 300         spin_unlock_irqrestore (&ohci->lock, flags);
 301         return rc;
 302 }
 303
 304 /*-------------------------------------------------------------------------*/
 305
 306 /* frees config/altsetting state for endpoints,
 307  * including ED memory, dummy TD, and bulk/intr data toggle
 308  */
 309
 310 static void
 311 ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
 312 {
 313         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 314         unsigned long           flags;
 315         struct ed               *ed = ep->hcpriv;
 316         unsigned                limit = 1000;
 317
 318         /* ASSERT:  any requests/urbs are being unlinked */
 319         /* ASSERT:  nobody can be submitting urbs for this any more */
 320
 321         if (!ed)
 322                 return;
 323
 324 rescan:
 325         spin_lock_irqsave (&ohci->lock, flags);
 326
 327         if (!HC_IS_RUNNING (hcd->state)) {
 328 sanitize:
 329                 ed->state = ED_IDLE;
 330                 if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
 331                         ohci->eds_scheduled--;
 332                 finish_unlinks (ohci, 0);
 333         }
 334
 335         switch (ed->state) {
 336         case ED_UNLINK:         /* wait for hw to finish? */
 337                 /* major IRQ delivery trouble loses INTR_SF too... */
 338                 if (limit-- == 0) {
 339                         ohci_warn(ohci, "ED unlink timeout\n");
 340                         if (quirk_zfmicro(ohci)) {
 341                                 ohci_warn(ohci, "Attempting ZF TD recovery\n");
 342                                 ohci->ed_to_check = ed;
 343                                 ohci->zf_delay = 2;
 344                         }
 345                         goto sanitize;
 346                 }
 347                 spin_unlock_irqrestore (&ohci->lock, flags);
 348                 schedule_timeout_uninterruptible(1);
 349                 goto rescan;
 350         case ED_IDLE:           /* fully unlinked */
 351                 if (list_empty (&ed->td_list)) {
 352                         td_free (ohci, ed->dummy);
 353                         ed_free (ohci, ed);
 354                         break;
 355                 }
 356                 /* else FALL THROUGH */
 357         default:
 358                 /* caller was supposed to have unlinked any requests;
 359                  * that's not our job.  can't recover; must leak ed.
 360                  */
 361                 ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
 362                         ed, ep->desc.bEndpointAddress, ed->state,
 363                         list_empty (&ed->td_list) ? "" : " (has tds)");
 364                 td_free (ohci, ed->dummy);
 365                 break;
 366         }
 367         ep->hcpriv = NULL;
 368         spin_unlock_irqrestore (&ohci->lock, flags);
 369         return;
 370 }
 371
 372 static int ohci_get_frame (struct usb_hcd *hcd)
 373 {
 374         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 375
 376         return ohci_frame_no(ohci);
 377 }
 378
 379 static void ohci_usb_reset (struct ohci_hcd *ohci)
 380 {
 381         ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
 382         ohci->hc_control &= OHCI_CTRL_RWC;
 383         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 384 }
 385
 386 /* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
 387  * other cases where the next software may expect clean state from the
 388  * "firmware".  this is bus-neutral, unlike shutdown() methods.
 389  */
 390 static void
 391 ohci_shutdown (struct usb_hcd *hcd)
 392 {
 393         struct ohci_hcd *ohci;
 394
 395         ohci = hcd_to_ohci (hcd);
 396         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 397         ohci_usb_reset (ohci);
 398         /* flush the writes */
 399         (void) ohci_readl (ohci, &ohci->regs->control);
 400 }
 401
 402 static int check_ed(struct ohci_hcd *ohci, struct ed *ed)
 403 {
 404         return (hc32_to_cpu(ohci, ed->hwINFO) & ED_IN) != 0
 405                 && (hc32_to_cpu(ohci, ed->hwHeadP) & TD_MASK)
 406                         == (hc32_to_cpu(ohci, ed->hwTailP) & TD_MASK)
 407                 && !list_empty(&ed->td_list);
 408 }
 409
 410 /* ZF Micro watchdog timer callback. The ZF Micro chipset sometimes completes
 411  * an interrupt TD but neglects to add it to the donelist.  On systems with
 412  * this chipset, we need to periodically check the state of the queues to look
 413  * for such "lost" TDs.
 414  */
 415 static void unlink_watchdog_func(unsigned long _ohci)
 416 {
 417         unsigned long   flags;
 418         unsigned        max;
 419         unsigned        seen_count = 0;
 420         unsigned        i;
 421         struct ed       **seen = NULL;
 422         struct ohci_hcd *ohci = (struct ohci_hcd *) _ohci;
 423
 424         spin_lock_irqsave(&ohci->lock, flags);
 425         max = ohci->eds_scheduled;
 426         if (!max)
 427                 goto done;
 428
 429         if (ohci->ed_to_check)
 430                 goto out;
 431
 432         seen = kcalloc(max, sizeof *seen, GFP_ATOMIC);
 433         if (!seen)
 434                 goto out;
 435
 436         for (i = 0; i < NUM_INTS; i++) {
 437                 struct ed       *ed = ohci->periodic[i];
 438
 439                 while (ed) {
 440                         unsigned        temp;
 441
 442                         /* scan this branch of the periodic schedule tree */
 443                         for (temp = 0; temp < seen_count; temp++) {
 444                                 if (seen[temp] == ed) {
 445                                         /* we've checked it and what's after */
 446                                         ed = NULL;
 447                                         break;
 448                                 }
 449                         }
 450                         if (!ed)
 451                                 break;
 452                         seen[seen_count++] = ed;
 453                         if (!check_ed(ohci, ed)) {
 454                                 ed = ed->ed_next;
 455                                 continue;
 456                         }
 457
 458                         /* HC's TD list is empty, but HCD sees at least one
 459                          * TD that's not been sent through the donelist.
 460                          */
 461                         ohci->ed_to_check = ed;
 462                         ohci->zf_delay = 2;
 463
 464                         /* The HC may wait until the next frame to report the
 465                          * TD as done through the donelist and INTR_WDH.  (We
 466                          * just *assume* it's not a multi-TD interrupt URB;
 467                          * those could defer the IRQ more than one frame, using
 468                          * DI...)  Check again after the next INTR_SF.
 469                          */
 470                         ohci_writel(ohci, OHCI_INTR_SF,
 471                                         &ohci->regs->intrstatus);
 472                         ohci_writel(ohci, OHCI_INTR_SF,
 473                                         &ohci->regs->intrenable);
 474
 475                         /* flush those writes */
 476                         (void) ohci_readl(ohci, &ohci->regs->control);
 477
 478                         goto out;
 479                 }
 480         }
 481 out:
 482         kfree(seen);
 483         if (ohci->eds_scheduled)
 484                 mod_timer(&ohci->unlink_watchdog, round_jiffies(jiffies + HZ));
 485 done:
 486         spin_unlock_irqrestore(&ohci->lock, flags);
 487 }
 488
 489 /*-------------------------------------------------------------------------*
 490  * HC functions
 491  *-------------------------------------------------------------------------*/
 492
 493 /* init memory, and kick BIOS/SMM off */
 494
 495 static int ohci_init (struct ohci_hcd *ohci)
 496 {
 497         int ret;
 498         struct usb_hcd *hcd = ohci_to_hcd(ohci);
 499
 500         if (distrust_firmware)
 501                 ohci->flags |= OHCI_QUIRK_HUB_POWER;
 502
 503         disable (ohci);
 504         ohci->regs = hcd->regs;
 505
 506         /* REVISIT this BIOS handshake is now moved into PCI "quirks", and
 507          * was never needed for most non-PCI systems ... remove the code?
 508          */
 509
 510 #ifndef IR_DISABLE
 511         /* SMM owns the HC?  not for long! */
 512         if (!no_handshake && ohci_readl (ohci,
 513                                         &ohci->regs->control) & OHCI_CTRL_IR) {
 514                 u32 temp;
 515
 516                 ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n");
 517
 518                 /* this timeout is arbitrary.  we make it long, so systems
 519                  * depending on usb keyboards may be usable even if the
 520                  * BIOS/SMM code seems pretty broken.
 521                  */
 522                 temp = 500;     /* arbitrary: five seconds */
 523
 524                 ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable);
 525                 ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus);
 526                 while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) {
 527                         msleep (10);
 528                         if (--temp == 0) {
 529                                 ohci_err (ohci, "USB HC takeover failed!"
 530                                         "  (BIOS/SMM bug)\n");
 531                                 return -EBUSY;
 532                         }
 533                 }
 534                 ohci_usb_reset (ohci);
 535         }
 536 #endif
 537
 538         /* Disable HC interrupts */
 539         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 540
 541         /* flush the writes, and save key bits like RWC */
 542         if (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_RWC)
 543                 ohci->hc_control |= OHCI_CTRL_RWC;
 544
 545         /* Read the number of ports unless overridden */
 546         if (ohci->num_ports == 0)
 547                 ohci->num_ports = roothub_a(ohci) & RH_A_NDP;
 548
 549         if (ohci->hcca)
 550                 return 0;
 551
 552         ohci->hcca = dma_alloc_coherent (hcd->self.controller,
 553                         sizeof *ohci->hcca, &ohci->hcca_dma, 0);
 554         if (!ohci->hcca)
 555                 return -ENOMEM;
 556
 557         if ((ret = ohci_mem_init (ohci)) < 0)
 558                 ohci_stop (hcd);
 559         else {
 560                 create_debug_files (ohci);
 561         }
 562
 563         return ret;
 564 }
 565
 566 /*-------------------------------------------------------------------------*/
 567
 568 /* Start an OHCI controller, set the BUS operational
 569  * resets USB and controller
 570  * enable interrupts
 571  */
 572 static int ohci_run (struct ohci_hcd *ohci)
 573 {
 574         u32                     mask, temp;
 575         int                     first = ohci->fminterval == 0;
 576         struct usb_hcd          *hcd = ohci_to_hcd(ohci);
 577
 578         disable (ohci);
 579
 580         /* boot firmware should have set this up (5.1.1.3.1) */
 581         if (first) {
 582
 583                 temp = ohci_readl (ohci, &ohci->regs->fminterval);
 584                 ohci->fminterval = temp & 0x3fff;
 585                 if (ohci->fminterval != FI)
 586                         ohci_dbg (ohci, "fminterval delta %d\n",
 587                                 ohci->fminterval - FI);
 588                 ohci->fminterval |= FSMP (ohci->fminterval) << 16;
 589                 /* also: power/overcurrent flags in roothub.a */
 590         }
 591
 592         /* Reset USB nearly "by the book".  RemoteWakeupConnected has
 593          * to be checked in case boot firmware (BIOS/SMM/...) has set up
 594          * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM).
 595          * If the bus glue detected wakeup capability then it should
 596          * already be enabled; if so we'll just enable it again.
 597          */
 598         if ((ohci->hc_control & OHCI_CTRL_RWC) != 0)
 599                 device_set_wakeup_capable(hcd->self.controller, 1);
 600
 601         switch (ohci->hc_control & OHCI_CTRL_HCFS) {
 602         case OHCI_USB_OPER:
 603                 temp = 0;
 604                 break;
 605         case OHCI_USB_SUSPEND:
 606         case OHCI_USB_RESUME:
 607                 ohci->hc_control &= OHCI_CTRL_RWC;
 608                 ohci->hc_control |= OHCI_USB_RESUME;
 609                 temp = 10 /* msec wait */;
 610                 break;
 611         // case OHCI_USB_RESET:
 612         default:
 613                 ohci->hc_control &= OHCI_CTRL_RWC;
 614                 ohci->hc_control |= OHCI_USB_RESET;
 615                 temp = 50 /* msec wait */;
 616                 break;
 617         }
 618         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 619         // flush the writes
 620         (void) ohci_readl (ohci, &ohci->regs->control);
 621         msleep(temp);
 622
 623         memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
 624
 625         /* 2msec timelimit here means no irqs/preempt */
 626         spin_lock_irq (&ohci->lock);
 627
 628 retry:
 629         /* HC Reset requires max 10 us delay */
 630         ohci_writel (ohci, OHCI_HCR,  &ohci->regs->cmdstatus);
 631         temp = 30;      /* ... allow extra time */
 632         while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
 633                 if (--temp == 0) {
 634                         spin_unlock_irq (&ohci->lock);
 635                         ohci_err (ohci, "USB HC reset timed out!\n");
 636                         return -1;
 637                 }
 638                 udelay (1);
 639         }
 640
 641         /* now we're in the SUSPEND state ... must go OPERATIONAL
 642          * within 2msec else HC enters RESUME
 643          *
 644          * ... but some hardware won't init fmInterval "by the book"
 645          * (SiS, OPTi ...), so reset again instead.  SiS doesn't need
 646          * this if we write fmInterval after we're OPERATIONAL.
 647          * Unclear about ALi, ServerWorks, and others ... this could
 648          * easily be a longstanding bug in chip init on Linux.
 649          */
 650         if (ohci->flags & OHCI_QUIRK_INITRESET) {
 651                 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 652                 // flush those writes
 653                 (void) ohci_readl (ohci, &ohci->regs->control);
 654         }
 655
 656         /* Tell the controller where the control and bulk lists are
 657          * The lists are empty now. */
 658         ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
 659         ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
 660
 661         /* a reset clears this */
 662         ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
 663
 664         periodic_reinit (ohci);
 665
 666         /* some OHCI implementations are finicky about how they init.
 667          * bogus values here mean not even enumeration could work.
 668          */
 669         if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
 670                         || !ohci_readl (ohci, &ohci->regs->periodicstart)) {
 671                 if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
 672                         ohci->flags |= OHCI_QUIRK_INITRESET;
 673                         ohci_dbg (ohci, "enabling initreset quirk\n");
 674                         goto retry;
 675                 }
 676                 spin_unlock_irq (&ohci->lock);
 677                 ohci_err (ohci, "init err (%08x %04x)\n",
 678                         ohci_readl (ohci, &ohci->regs->fminterval),
 679                         ohci_readl (ohci, &ohci->regs->periodicstart));
 680                 return -EOVERFLOW;
 681         }
 682
 683         /* use rhsc irqs after khubd is fully initialized */
 684         hcd->poll_rh = 1;
 685         hcd->uses_new_polling = 1;
 686
 687         /* start controller operations */
 688         ohci->hc_control &= OHCI_CTRL_RWC;
 689         ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
 690         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 691         hcd->state = HC_STATE_RUNNING;
 692
 693         /* wake on ConnectStatusChange, matching external hubs */
 694         ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
 695
 696         /* Choose the interrupts we care about now, others later on demand */
 697         mask = OHCI_INTR_INIT;
 698         ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
 699         ohci_writel (ohci, mask, &ohci->regs->intrenable);
 700
 701         /* handle root hub init quirks ... */
 702         temp = roothub_a (ohci);
 703         temp &= ~(RH_A_PSM | RH_A_OCPM);
 704         if (ohci->flags & OHCI_QUIRK_SUPERIO) {
 705                 /* NSC 87560 and maybe others */
 706                 temp |= RH_A_NOCP;
 707                 temp &= ~(RH_A_POTPGT | RH_A_NPS);
 708                 ohci_writel (ohci, temp, &ohci->regs->roothub.a);
 709         } else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
 710                         (ohci->flags & OHCI_QUIRK_HUB_POWER)) {
 711                 /* hub power always on; required for AMD-756 and some
 712                  * Mac platforms.  ganged overcurrent reporting, if any.
 713                  */
 714                 temp |= RH_A_NPS;
 715                 ohci_writel (ohci, temp, &ohci->regs->roothub.a);
 716         }
 717         ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
 718         ohci_writel (ohci, (temp & RH_A_NPS) ? 0 : RH_B_PPCM,
 719                                                 &ohci->regs->roothub.b);
 720         // flush those writes
 721         (void) ohci_readl (ohci, &ohci->regs->control);
 722
 723         ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 724         spin_unlock_irq (&ohci->lock);
 725
 726         // POTPGT delay is bits 24-31, in 2 ms units.
 727         mdelay ((temp >> 23) & 0x1fe);
 728         hcd->state = HC_STATE_RUNNING;
 729
 730         if (quirk_zfmicro(ohci)) {
 731                 /* Create timer to watch for bad queue state on ZF Micro */
 732                 setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
 733                                 (unsigned long) ohci);
 734
 735                 ohci->eds_scheduled = 0;
 736                 ohci->ed_to_check = NULL;
 737         }
 738
 739         ohci_dump (ohci, 1);
 740
 741         return 0;
 742 }
 743
 744 /*-------------------------------------------------------------------------*/
 745
 746 /* an interrupt happens */
 747
 748 static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 749 {
 750         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 751         struct ohci_regs __iomem *regs = ohci->regs;
 752         int                     ints;
 753
 754         /* Read interrupt status (and flush pending writes).  We ignore the
 755          * optimization of checking the LSB of hcca->done_head; it doesn't
 756          * work on all systems (edge triggering for OHCI can be a factor).
 757          */
 758         ints = ohci_readl(ohci, &regs->intrstatus);
 759
 760         /* Check for an all 1's result which is a typical consequence
 761          * of dead, unclocked, or unplugged (CardBus...) devices
 762          */
 763         if (ints == ~(u32)0) {
 764                 disable (ohci);
 765                 ohci_dbg (ohci, "device removed!\n");
 766                 return IRQ_HANDLED;
 767         }
 768
 769         /* We only care about interrupts that are enabled */
 770         ints &= ohci_readl(ohci, &regs->intrenable);
 771
 772         /* interrupt for some other device? */
 773         if (ints == 0)
 774                 return IRQ_NOTMINE;
 775
 776         if (ints & OHCI_INTR_UE) {
 777                 // e.g. due to PCI Master/Target Abort
 778                 if (quirk_nec(ohci)) {
 779                         /* Workaround for a silicon bug in some NEC chips used
 780                          * in Apple's PowerBooks. Adapted from Darwin code.
 781                          */
 782                         ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
 783
 784                         ohci_writel (ohci, OHCI_INTR_UE, &regs->intrdisable);
 785
 786                         schedule_work (&ohci->nec_work);
 787                 } else {
 788                         disable (ohci);
 789                         ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
 790                 }
 791
 792                 ohci_dump (ohci, 1);
 793                 ohci_usb_reset (ohci);
 794         }
 795
 796         if (ints & OHCI_INTR_RHSC) {
 797                 ohci_vdbg(ohci, "rhsc\n");
 798                 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 799                 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
 800                                 &regs->intrstatus);
 801
 802                 /* NOTE: Vendors didn't always make the same implementation
 803                  * choices for RHSC.  Many followed the spec; RHSC triggers
 804                  * on an edge, like setting and maybe clearing a port status
 805                  * change bit.  With others it's level-triggered, active
 806                  * until khubd clears all the port status change bits.  We'll
 807                  * always disable it here and rely on polling until khubd
 808                  * re-enables it.
 809                  */
 810                 ohci_writel(ohci, OHCI_INTR_RHSC, &regs->intrdisable);
 811                 usb_hcd_poll_rh_status(hcd);
 812         }
 813
 814         /* For connect and disconnect events, we expect the controller
 815          * to turn on RHSC along with RD.  But for remote wakeup events
 816          * this might not happen.
 817          */
 818         else if (ints & OHCI_INTR_RD) {
 819                 ohci_vdbg(ohci, "resume detect\n");
 820                 ohci_writel(ohci, OHCI_INTR_RD, &regs->intrstatus);
 821                 hcd->poll_rh = 1;
 822                 if (ohci->autostop) {
 823                         spin_lock (&ohci->lock);
 824                         ohci_rh_resume (ohci);
 825                         spin_unlock (&ohci->lock);
 826                 } else
 827                         usb_hcd_resume_root_hub(hcd);
 828         }
 829
 830         if (ints & OHCI_INTR_WDH) {
 831                 spin_lock (&ohci->lock);
 832                 dl_done_list (ohci);
 833                 spin_unlock (&ohci->lock);
 834         }
 835
 836         if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
 837                 spin_lock(&ohci->lock);
 838                 if (ohci->ed_to_check) {
 839                         struct ed *ed = ohci->ed_to_check;
 840
 841                         if (check_ed(ohci, ed)) {
 842                                 /* HC thinks the TD list is empty; HCD knows
 843                                  * at least one TD is outstanding
 844                                  */
 845                                 if (--ohci->zf_delay == 0) {
 846                                         struct td *td = list_entry(
 847                                                 ed->td_list.next,
 848                                                 struct td, td_list);
 849                                         ohci_warn(ohci,
 850                                                   "Reclaiming orphan TD %p\n",
 851                                                   td);
 852                                         takeback_td(ohci, td);
 853                                         ohci->ed_to_check = NULL;
 854                                 }
 855                         } else
 856                                 ohci->ed_to_check = NULL;
 857                 }
 858                 spin_unlock(&ohci->lock);
 859         }
 860
 861         /* could track INTR_SO to reduce available PCI/... bandwidth */
 862
 863         /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
 864          * when there's still unlinking to be done (next frame).
 865          */
 866         spin_lock (&ohci->lock);
 867         if (ohci->ed_rm_list)
 868                 finish_unlinks (ohci, ohci_frame_no(ohci));
 869         if ((ints & OHCI_INTR_SF) != 0
 870                         && !ohci->ed_rm_list
 871                         && !ohci->ed_to_check
 872                         && HC_IS_RUNNING(hcd->state))
 873                 ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
 874         spin_unlock (&ohci->lock);
 875
 876         if (HC_IS_RUNNING(hcd->state)) {
 877                 ohci_writel (ohci, ints, &regs->intrstatus);
 878                 ohci_writel (ohci, OHCI_INTR_MIE, &regs->intrenable);
 879                 // flush those writes
 880                 (void) ohci_readl (ohci, &ohci->regs->control);
 881         }
 882
 883         return IRQ_HANDLED;
 884 }
 885
 886 /*-------------------------------------------------------------------------*/
 887
 888 static void ohci_stop (struct usb_hcd *hcd)
 889 {
 890         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 891
 892         ohci_dump (ohci, 1);
 893
 894         flush_scheduled_work();
 895
 896         ohci_usb_reset (ohci);
 897         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 898         free_irq(hcd->irq, hcd);
 899         hcd->irq = -1;
 900
 901         if (quirk_zfmicro(ohci))
 902                 del_timer(&ohci->unlink_watchdog);
 903         if (quirk_amdiso(ohci))
 904                 amd_iso_dev_put();
 905
 906         remove_debug_files (ohci);
 907         ohci_mem_cleanup (ohci);
 908         if (ohci->hcca) {
 909                 dma_free_coherent (hcd->self.controller,
 910                                 sizeof *ohci->hcca,
 911                                 ohci->hcca, ohci->hcca_dma);
 912                 ohci->hcca = NULL;
 913                 ohci->hcca_dma = 0;
 914         }
 915 }
 916
 917 /*-------------------------------------------------------------------------*/
 918
 919 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
 920
 921 /* must not be called from interrupt context */
 922 static int ohci_restart (struct ohci_hcd *ohci)
 923 {
 924         int temp;
 925         int i;
 926         struct urb_priv *priv;
 927
 928         spin_lock_irq(&ohci->lock);
 929         disable (ohci);
 930
 931         /* Recycle any "live" eds/tds (and urbs). */
 932         if (!list_empty (&ohci->pending))
 933                 ohci_dbg(ohci, "abort schedule...\n");
 934         list_for_each_entry (priv, &ohci->pending, pending) {
 935                 struct urb      *urb = priv->td[0]->urb;
 936                 struct ed       *ed = priv->ed;
 937
 938                 switch (ed->state) {
 939                 case ED_OPER:
 940                         ed->state = ED_UNLINK;
 941                         ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
 942                         ed_deschedule (ohci, ed);
 943
 944                         ed->ed_next = ohci->ed_rm_list;
 945                         ed->ed_prev = NULL;
 946                         ohci->ed_rm_list = ed;
 947                         /* FALLTHROUGH */
 948                 case ED_UNLINK:
 949                         break;
 950                 default:
 951                         ohci_dbg(ohci, "bogus ed %p state %d\n",
 952                                         ed, ed->state);
 953                 }
 954
 955                 if (!urb->unlinked)
 956                         urb->unlinked = -ESHUTDOWN;
 957         }
 958         finish_unlinks (ohci, 0);
 959         spin_unlock_irq(&ohci->lock);
 960
 961         /* paranoia, in case that didn't work: */
 962
 963         /* empty the interrupt branches */
 964         for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
 965         for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
 966
 967         /* no EDs to remove */
 968         ohci->ed_rm_list = NULL;
 969
 970         /* empty control and bulk lists */
 971         ohci->ed_controltail = NULL;
 972         ohci->ed_bulktail    = NULL;
 973
 974         if ((temp = ohci_run (ohci)) < 0) {
 975                 ohci_err (ohci, "can't restart, %d\n", temp);
 976                 return temp;
 977         }
 978         ohci_dbg(ohci, "restart complete\n");
 979         return 0;
 980 }
 981
 982 #endif
 983
 984 /*-------------------------------------------------------------------------*/
 985
 986 MODULE_AUTHOR (DRIVER_AUTHOR);
 987 MODULE_DESCRIPTION(DRIVER_DESC);
 988 MODULE_LICENSE ("GPL");
 989
 990 #ifdef CONFIG_PCI
 991 #include "ohci-pci.c"
 992 #define PCI_DRIVER              ohci_pci_driver
 993 #endif
 994
 995 #if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
 996 #include "ohci-sa1111.c"
 997 #define SA1111_DRIVER           ohci_hcd_sa1111_driver
 998 #endif
 999
1000 #if defined(CONFIG_ARCH_S3C2410) || defined(CONFIG_ARCH_S3C64XX)
1001 #include "ohci-s3c2410.c"
1002 #define PLATFORM_DRIVER         ohci_hcd_s3c2410_driver
1003 #endif
1004
1005 #ifdef CONFIG_ARCH_OMAP
1006 #include "ohci-omap.c"
1007 #define PLATFORM_DRIVER         ohci_hcd_omap_driver
1008 #endif
1009
1010 #ifdef CONFIG_ARCH_LH7A404
1011 #include "ohci-lh7a404.c"
1012 #define PLATFORM_DRIVER         ohci_hcd_lh7a404_driver
1013 #endif
1014
1015 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
1016 #include "ohci-pxa27x.c"
1017 #define PLATFORM_DRIVER         ohci_hcd_pxa27x_driver
1018 #endif
1019
1020 #ifdef CONFIG_ARCH_EP93XX
1021 #include "ohci-ep93xx.c"
1022 #define PLATFORM_DRIVER         ohci_hcd_ep93xx_driver
1023 #endif
1024
1025 #ifdef CONFIG_SOC_AU1X00
1026 #include "ohci-au1xxx.c"
1027 #define PLATFORM_DRIVER         ohci_hcd_au1xxx_driver
1028 #endif
1029
1030 #ifdef CONFIG_PNX8550
1031 #include "ohci-pnx8550.c"
1032 #define PLATFORM_DRIVER         ohci_hcd_pnx8550_driver
1033 #endif
1034
1035 #ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
1036 #include "ohci-ppc-soc.c"
1037 #define PLATFORM_DRIVER         ohci_hcd_ppc_soc_driver
1038 #endif
1039
1040 #ifdef CONFIG_ARCH_AT91
1041 #include "ohci-at91.c"
1042 #define PLATFORM_DRIVER         ohci_hcd_at91_driver
1043 #endif
1044
1045 #ifdef CONFIG_ARCH_PNX4008
1046 #include "ohci-pnx4008.c"
1047 #define PLATFORM_DRIVER         usb_hcd_pnx4008_driver
1048 #endif
1049
1050 #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
1051     defined(CONFIG_CPU_SUBTYPE_SH7721) || \
1052     defined(CONFIG_CPU_SUBTYPE_SH7763) || \
1053     defined(CONFIG_CPU_SUBTYPE_SH7786)
1054 #include "ohci-sh.c"
1055 #define PLATFORM_DRIVER         ohci_hcd_sh_driver
1056 #endif
1057
1058
1059 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF
1060 #include "ohci-ppc-of.c"
1061 #define OF_PLATFORM_DRIVER      ohci_hcd_ppc_of_driver
1062 #endif
1063
1064 #ifdef CONFIG_PPC_PS3
1065 #include "ohci-ps3.c"
1066 #define PS3_SYSTEM_BUS_DRIVER   ps3_ohci_driver
1067 #endif
1068
1069 #ifdef CONFIG_USB_OHCI_HCD_SSB
1070 #include "ohci-ssb.c"
1071 #define SSB_OHCI_DRIVER         ssb_ohci_driver
1072 #endif
1073
1074 #ifdef CONFIG_MFD_SM501
1075 #include "ohci-sm501.c"
1076 #define SM501_OHCI_DRIVER       ohci_hcd_sm501_driver
1077 #endif
1078
1079 #ifdef CONFIG_MFD_TC6393XB
1080 #include "ohci-tmio.c"
1081 #define TMIO_OHCI_DRIVER        ohci_hcd_tmio_driver
1082 #endif
1083
1084 #if     !defined(PCI_DRIVER) &&         \
1085         !defined(PLATFORM_DRIVER) &&    \
1086         !defined(OF_PLATFORM_DRIVER) && \
1087         !defined(SA1111_DRIVER) &&      \
1088         !defined(PS3_SYSTEM_BUS_DRIVER) && \
1089         !defined(SM501_OHCI_DRIVER) && \
1090         !defined(TMIO_OHCI_DRIVER) && \
1091         !defined(SSB_OHCI_DRIVER)
1092 #error "missing bus glue for ohci-hcd"
1093 #endif
1094
1095 static int __init ohci_hcd_mod_init(void)
1096 {
1097         int retval = 0;
1098
1099         if (usb_disabled())
1100                 return -ENODEV;
1101
1102         printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1103         pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
1104                 sizeof (struct ed), sizeof (struct td));
1105         set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1106
1107 #ifdef DEBUG
1108         ohci_debug_root = debugfs_create_dir("ohci", NULL);
1109         if (!ohci_debug_root) {
1110                 retval = -ENOENT;
1111                 goto error_debug;
1112         }
1113 #endif
1114
1115 #ifdef PS3_SYSTEM_BUS_DRIVER
1116         retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1117         if (retval < 0)
1118                 goto error_ps3;
1119 #endif
1120
1121 #ifdef PLATFORM_DRIVER
1122         retval = platform_driver_register(&PLATFORM_DRIVER);
1123         if (retval < 0)
1124                 goto error_platform;
1125 #endif
1126
1127 #ifdef OF_PLATFORM_DRIVER
1128         retval = of_register_platform_driver(&OF_PLATFORM_DRIVER);
1129         if (retval < 0)
1130                 goto error_of_platform;
1131 #endif
1132
1133 #ifdef SA1111_DRIVER
1134         retval = sa1111_driver_register(&SA1111_DRIVER);
1135         if (retval < 0)
1136                 goto error_sa1111;
1137 #endif
1138
1139 #ifdef PCI_DRIVER
1140         retval = pci_register_driver(&PCI_DRIVER);
1141         if (retval < 0)
1142                 goto error_pci;
1143 #endif
1144
1145 #ifdef SSB_OHCI_DRIVER
1146         retval = ssb_driver_register(&SSB_OHCI_DRIVER);
1147         if (retval)
1148                 goto error_ssb;
1149 #endif
1150
1151 #ifdef SM501_OHCI_DRIVER
1152         retval = platform_driver_register(&SM501_OHCI_DRIVER);
1153         if (retval < 0)
1154                 goto error_sm501;
1155 #endif
1156
1157 #ifdef TMIO_OHCI_DRIVER
1158         retval = platform_driver_register(&TMIO_OHCI_DRIVER);
1159         if (retval < 0)
1160                 goto error_tmio;
1161 #endif
1162
1163         return retval;
1164
1165         /* Error path */
1166 #ifdef TMIO_OHCI_DRIVER
1167         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1168  error_tmio:
1169 #endif
1170 #ifdef SM501_OHCI_DRIVER
1171         platform_driver_unregister(&SM501_OHCI_DRIVER);
1172  error_sm501:
1173 #endif
1174 #ifdef SSB_OHCI_DRIVER
1175         ssb_driver_unregister(&SSB_OHCI_DRIVER);
1176  error_ssb:
1177 #endif
1178 #ifdef PCI_DRIVER
1179         pci_unregister_driver(&PCI_DRIVER);
1180  error_pci:
1181 #endif
1182 #ifdef SA1111_DRIVER
1183         sa1111_driver_unregister(&SA1111_DRIVER);
1184  error_sa1111:
1185 #endif
1186 #ifdef OF_PLATFORM_DRIVER
1187         of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1188  error_of_platform:
1189 #endif
1190 #ifdef PLATFORM_DRIVER
1191         platform_driver_unregister(&PLATFORM_DRIVER);
1192  error_platform:
1193 #endif
1194 #ifdef PS3_SYSTEM_BUS_DRIVER
1195         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1196  error_ps3:
1197 #endif
1198 #ifdef DEBUG
1199         debugfs_remove(ohci_debug_root);
1200         ohci_debug_root = NULL;
1201  error_debug:
1202 #endif
1203
1204         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1205         return retval;
1206 }
1207 module_init(ohci_hcd_mod_init);
1208
1209 static void __exit ohci_hcd_mod_exit(void)
1210 {
1211 #ifdef TMIO_OHCI_DRIVER
1212         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1213 #endif
1214 #ifdef SM501_OHCI_DRIVER
1215         platform_driver_unregister(&SM501_OHCI_DRIVER);
1216 #endif
1217 #ifdef SSB_OHCI_DRIVER
1218         ssb_driver_unregister(&SSB_OHCI_DRIVER);
1219 #endif
1220 #ifdef PCI_DRIVER
1221         pci_unregister_driver(&PCI_DRIVER);
1222 #endif
1223 #ifdef SA1111_DRIVER
1224         sa1111_driver_unregister(&SA1111_DRIVER);
1225 #endif
1226 #ifdef OF_PLATFORM_DRIVER
1227         of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1228 #endif
1229 #ifdef PLATFORM_DRIVER
1230         platform_driver_unregister(&PLATFORM_DRIVER);
1231 #endif
1232 #ifdef PS3_SYSTEM_BUS_DRIVER
1233         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1234 #endif
1235 #ifdef DEBUG
1236         debugfs_remove(ohci_debug_root);
1237 #endif
1238         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1239 }
1240 module_exit(ohci_hcd_mod_exit);
1241