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/workqueue.h>
  38 #include <linux/debugfs.h>
  39
  40 #include <asm/io.h>
  41 #include <asm/irq.h>
  42 #include <asm/system.h>
  43 #include <asm/unaligned.h>
  44 #include <asm/byteorder.h>
  45
  46 #include "../core/hcd.h"
  47
  48 #define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
  49 #define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
  50
  51 /*-------------------------------------------------------------------------*/
  52
  53 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  54
  55 /* For initializing controller (mask in an HCFS mode too) */
  56 #define OHCI_CONTROL_INIT       OHCI_CTRL_CBSR
  57 #define OHCI_INTR_INIT \
  58                 (OHCI_INTR_MIE | OHCI_INTR_RHSC | OHCI_INTR_UE \
  59                 | OHCI_INTR_RD | OHCI_INTR_WDH)
  60
  61 #ifdef __hppa__
  62 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
  63 #define IR_DISABLE
  64 #endif
  65
  66 #ifdef CONFIG_ARCH_OMAP
  67 /* OMAP doesn't support IR (no SMM; not needed) */
  68 #define IR_DISABLE
  69 #endif
  70
  71 /*-------------------------------------------------------------------------*/
  72
  73 static const char       hcd_name [] = "ohci_hcd";
  74
  75 #define STATECHANGE_DELAY       msecs_to_jiffies(300)
  76
  77 #include "ohci.h"
  78
  79 static void ohci_dump (struct ohci_hcd *ohci, int verbose);
  80 static int ohci_init (struct ohci_hcd *ohci);
  81 static void ohci_stop (struct usb_hcd *hcd);
  82
  83 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
  84 static int ohci_restart (struct ohci_hcd *ohci);
  85 #endif
  86
  87 #ifdef CONFIG_PCI
  88 static void quirk_amd_pll(int state);
  89 static void amd_iso_dev_put(void);
  90 static void sb800_prefetch(struct ohci_hcd *ohci, int on);
  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 static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
 101 {
 102         return;
 103 }
 104 #endif
 105
 106
 107 #include "ohci-hub.c"
 108 #include "ohci-dbg.c"
 109 #include "ohci-mem.c"
 110 #include "ohci-q.c"
 111
 112
 113 /*
 114  * On architectures with edge-triggered interrupts we must never return
 115  * IRQ_NONE.
 116  */
 117 #if defined(CONFIG_SA1111)  /* ... or other edge-triggered systems */
 118 #define IRQ_NOTMINE     IRQ_HANDLED
 119 #else
 120 #define IRQ_NOTMINE     IRQ_NONE
 121 #endif
 122
 123
 124 /* Some boards misreport power switching/overcurrent */
 125 static int distrust_firmware = 1;
 126 module_param (distrust_firmware, bool, 0);
 127 MODULE_PARM_DESC (distrust_firmware,
 128         "true to distrust firmware power/overcurrent setup");
 129
 130 /* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */
 131 static int no_handshake = 0;
 132 module_param (no_handshake, bool, 0);
 133 MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
 134
 135 /*-------------------------------------------------------------------------*/
 136
 137 /*
 138  * queue up an urb for anything except the root hub
 139  */
 140 static int ohci_urb_enqueue (
 141         struct usb_hcd  *hcd,
 142         struct urb      *urb,
 143         gfp_t           mem_flags
 144 ) {
 145         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 146         struct ed       *ed;
 147         urb_priv_t      *urb_priv;
 148         unsigned int    pipe = urb->pipe;
 149         int             i, size = 0;
 150         unsigned long   flags;
 151         int             retval = 0;
 152
 153 #ifdef OHCI_VERBOSE_DEBUG
 154         urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
 155 #endif
 156
 157         /* every endpoint has a ed, locate and maybe (re)initialize it */
 158         if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
 159                 return -ENOMEM;
 160
 161         /* for the private part of the URB we need the number of TDs (size) */
 162         switch (ed->type) {
 163                 case PIPE_CONTROL:
 164                         /* td_submit_urb() doesn't yet handle these */
 165                         if (urb->transfer_buffer_length > 4096)
 166                                 return -EMSGSIZE;
 167
 168                         /* 1 TD for setup, 1 for ACK, plus ... */
 169                         size = 2;
 170                         /* FALLTHROUGH */
 171                 // case PIPE_INTERRUPT:
 172                 // case PIPE_BULK:
 173                 default:
 174                         /* one TD for every 4096 Bytes (can be upto 8K) */
 175                         size += urb->transfer_buffer_length / 4096;
 176                         /* ... and for any remaining bytes ... */
 177                         if ((urb->transfer_buffer_length % 4096) != 0)
 178                                 size++;
 179                         /* ... and maybe a zero length packet to wrap it up */
 180                         if (size == 0)
 181                                 size++;
 182                         else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
 183                                 && (urb->transfer_buffer_length
 184                                         % usb_maxpacket (urb->dev, pipe,
 185                                                 usb_pipeout (pipe))) == 0)
 186                                 size++;
 187                         break;
 188                 case PIPE_ISOCHRONOUS: /* number of packets from URB */
 189                         size = urb->number_of_packets;
 190                         break;
 191         }
 192
 193         /* allocate the private part of the URB */
 194         urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
 195                         mem_flags);
 196         if (!urb_priv)
 197                 return -ENOMEM;
 198         INIT_LIST_HEAD (&urb_priv->pending);
 199         urb_priv->length = size;
 200         urb_priv->ed = ed;
 201
 202         /* allocate the TDs (deferring hash chain updates) */
 203         for (i = 0; i < size; i++) {
 204                 urb_priv->td [i] = td_alloc (ohci, mem_flags);
 205                 if (!urb_priv->td [i]) {
 206                         urb_priv->length = i;
 207                         urb_free_priv (ohci, urb_priv);
 208                         return -ENOMEM;
 209                 }
 210         }
 211
 212         spin_lock_irqsave (&ohci->lock, flags);
 213
 214         /* don't submit to a dead HC */
 215         if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
 216                 retval = -ENODEV;
 217                 goto fail;
 218         }
 219         if (!HC_IS_RUNNING(hcd->state)) {
 220                 retval = -ENODEV;
 221                 goto fail;
 222         }
 223         retval = usb_hcd_link_urb_to_ep(hcd, urb);
 224         if (retval)
 225                 goto fail;
 226
 227         /* schedule the ed if needed */
 228         if (ed->state == ED_IDLE) {
 229                 retval = ed_schedule (ohci, ed);
 230                 if (retval < 0) {
 231                         usb_hcd_unlink_urb_from_ep(hcd, urb);
 232                         goto fail;
 233                 }
 234                 if (ed->type == PIPE_ISOCHRONOUS) {
 235                         u16     frame = ohci_frame_no(ohci);
 236
 237                         /* delay a few frames before the first TD */
 238                         frame += max_t (u16, 8, ed->interval);
 239                         frame &= ~(ed->interval - 1);
 240                         frame |= ed->branch;
 241                         urb->start_frame = frame;
 242
 243                         /* yes, only URB_ISO_ASAP is supported, and
 244                          * urb->start_frame is never used as input.
 245                          */
 246                 }
 247         } else if (ed->type == PIPE_ISOCHRONOUS)
 248                 urb->start_frame = ed->last_iso + ed->interval;
 249
 250         /* fill the TDs and link them to the ed; and
 251          * enable that part of the schedule, if needed
 252          * and update count of queued periodic urbs
 253          */
 254         urb->hcpriv = urb_priv;
 255         td_submit_urb (ohci, urb);
 256
 257 fail:
 258         if (retval)
 259                 urb_free_priv (ohci, urb_priv);
 260         spin_unlock_irqrestore (&ohci->lock, flags);
 261         return retval;
 262 }
 263
 264 /*
 265  * decouple the URB from the HC queues (TDs, urb_priv).
 266  * reporting is always done
 267  * asynchronously, and we might be dealing with an urb that's
 268  * partially transferred, or an ED with other urbs being unlinked.
 269  */
 270 static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 271 {
 272         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 273         unsigned long           flags;
 274         int                     rc;
 275
 276 #ifdef OHCI_VERBOSE_DEBUG
 277         urb_print(urb, "UNLINK", 1, status);
 278 #endif
 279
 280         spin_lock_irqsave (&ohci->lock, flags);
 281         rc = usb_hcd_check_unlink_urb(hcd, urb, status);
 282         if (rc) {
 283                 ;       /* Do nothing */
 284         } else if (HC_IS_RUNNING(hcd->state)) {
 285                 urb_priv_t  *urb_priv;
 286
 287                 /* Unless an IRQ completed the unlink while it was being
 288                  * handed to us, flag it for unlink and giveback, and force
 289                  * some upcoming INTR_SF to call finish_unlinks()
 290                  */
 291                 urb_priv = urb->hcpriv;
 292                 if (urb_priv) {
 293                         if (urb_priv->ed->state == ED_OPER)
 294                                 start_ed_unlink (ohci, urb_priv->ed);
 295                 }
 296         } else {
 297                 /*
 298                  * with HC dead, we won't respect hc queue pointers
 299                  * any more ... just clean up every urb's memory.
 300                  */
 301                 if (urb->hcpriv)
 302                         finish_urb(ohci, urb, status);
 303         }
 304         spin_unlock_irqrestore (&ohci->lock, flags);
 305         return rc;
 306 }
 307
 308 /*-------------------------------------------------------------------------*/
 309
 310 /* frees config/altsetting state for endpoints,
 311  * including ED memory, dummy TD, and bulk/intr data toggle
 312  */
 313
 314 static void
 315 ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
 316 {
 317         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 318         unsigned long           flags;
 319         struct ed               *ed = ep->hcpriv;
 320         unsigned                limit = 1000;
 321
 322         /* ASSERT:  any requests/urbs are being unlinked */
 323         /* ASSERT:  nobody can be submitting urbs for this any more */
 324
 325         if (!ed)
 326                 return;
 327
 328 rescan:
 329         spin_lock_irqsave (&ohci->lock, flags);
 330
 331         if (!HC_IS_RUNNING (hcd->state)) {
 332 sanitize:
 333                 ed->state = ED_IDLE;
 334                 if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
 335                         ohci->eds_scheduled--;
 336                 finish_unlinks (ohci, 0);
 337         }
 338
 339         switch (ed->state) {
 340         case ED_UNLINK:         /* wait for hw to finish? */
 341                 /* major IRQ delivery trouble loses INTR_SF too... */
 342                 if (limit-- == 0) {
 343                         ohci_warn(ohci, "ED unlink timeout\n");
 344                         if (quirk_zfmicro(ohci)) {
 345                                 ohci_warn(ohci, "Attempting ZF TD recovery\n");
 346                                 ohci->ed_to_check = ed;
 347                                 ohci->zf_delay = 2;
 348                         }
 349                         goto sanitize;
 350                 }
 351                 spin_unlock_irqrestore (&ohci->lock, flags);
 352                 schedule_timeout_uninterruptible(1);
 353                 goto rescan;
 354         case ED_IDLE:           /* fully unlinked */
 355                 if (list_empty (&ed->td_list)) {
 356                         td_free (ohci, ed->dummy);
 357                         ed_free (ohci, ed);
 358                         break;
 359                 }
 360                 /* else FALL THROUGH */
 361         default:
 362                 /* caller was supposed to have unlinked any requests;
 363                  * that's not our job.  can't recover; must leak ed.
 364                  */
 365                 ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
 366                         ed, ep->desc.bEndpointAddress, ed->state,
 367                         list_empty (&ed->td_list) ? "" : " (has tds)");
 368                 td_free (ohci, ed->dummy);
 369                 break;
 370         }
 371         ep->hcpriv = NULL;
 372         spin_unlock_irqrestore (&ohci->lock, flags);
 373         return;
 374 }
 375
 376 static int ohci_get_frame (struct usb_hcd *hcd)
 377 {
 378         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 379
 380         return ohci_frame_no(ohci);
 381 }
 382
 383 static void ohci_usb_reset (struct ohci_hcd *ohci)
 384 {
 385         ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
 386         ohci->hc_control &= OHCI_CTRL_RWC;
 387         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 388 }
 389
 390 /* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
 391  * other cases where the next software may expect clean state from the
 392  * "firmware".  this is bus-neutral, unlike shutdown() methods.
 393  */
 394 static void
 395 ohci_shutdown (struct usb_hcd *hcd)
 396 {
 397         struct ohci_hcd *ohci;
 398
 399         ohci = hcd_to_ohci (hcd);
 400         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 401         ohci_usb_reset (ohci);
 402         /* flush the writes */
 403         (void) ohci_readl (ohci, &ohci->regs->control);
 404 }
 405
 406 static int check_ed(struct ohci_hcd *ohci, struct ed *ed)
 407 {
 408         return (hc32_to_cpu(ohci, ed->hwINFO) & ED_IN) != 0
 409                 && (hc32_to_cpu(ohci, ed->hwHeadP) & TD_MASK)
 410                         == (hc32_to_cpu(ohci, ed->hwTailP) & TD_MASK)
 411                 && !list_empty(&ed->td_list);
 412 }
 413
 414 /* ZF Micro watchdog timer callback. The ZF Micro chipset sometimes completes
 415  * an interrupt TD but neglects to add it to the donelist.  On systems with
 416  * this chipset, we need to periodically check the state of the queues to look
 417  * for such "lost" TDs.
 418  */
 419 static void unlink_watchdog_func(unsigned long _ohci)
 420 {
 421         unsigned long   flags;
 422         unsigned        max;
 423         unsigned        seen_count = 0;
 424         unsigned        i;
 425         struct ed       **seen = NULL;
 426         struct ohci_hcd *ohci = (struct ohci_hcd *) _ohci;
 427
 428         spin_lock_irqsave(&ohci->lock, flags);
 429         max = ohci->eds_scheduled;
 430         if (!max)
 431                 goto done;
 432
 433         if (ohci->ed_to_check)
 434                 goto out;
 435
 436         seen = kcalloc(max, sizeof *seen, GFP_ATOMIC);
 437         if (!seen)
 438                 goto out;
 439
 440         for (i = 0; i < NUM_INTS; i++) {
 441                 struct ed       *ed = ohci->periodic[i];
 442
 443                 while (ed) {
 444                         unsigned        temp;
 445
 446                         /* scan this branch of the periodic schedule tree */
 447                         for (temp = 0; temp < seen_count; temp++) {
 448                                 if (seen[temp] == ed) {
 449                                         /* we've checked it and what's after */
 450                                         ed = NULL;
 451                                         break;
 452                                 }
 453                         }
 454                         if (!ed)
 455                                 break;
 456                         seen[seen_count++] = ed;
 457                         if (!check_ed(ohci, ed)) {
 458                                 ed = ed->ed_next;
 459                                 continue;
 460                         }
 461
 462                         /* HC's TD list is empty, but HCD sees at least one
 463                          * TD that's not been sent through the donelist.
 464                          */
 465                         ohci->ed_to_check = ed;
 466                         ohci->zf_delay = 2;
 467
 468                         /* The HC may wait until the next frame to report the
 469                          * TD as done through the donelist and INTR_WDH.  (We
 470                          * just *assume* it's not a multi-TD interrupt URB;
 471                          * those could defer the IRQ more than one frame, using
 472                          * DI...)  Check again after the next INTR_SF.
 473                          */
 474                         ohci_writel(ohci, OHCI_INTR_SF,
 475                                         &ohci->regs->intrstatus);
 476                         ohci_writel(ohci, OHCI_INTR_SF,
 477                                         &ohci->regs->intrenable);
 478
 479                         /* flush those writes */
 480                         (void) ohci_readl(ohci, &ohci->regs->control);
 481
 482                         goto out;
 483                 }
 484         }
 485 out:
 486         kfree(seen);
 487         if (ohci->eds_scheduled)
 488                 mod_timer(&ohci->unlink_watchdog, round_jiffies(jiffies + HZ));
 489 done:
 490         spin_unlock_irqrestore(&ohci->lock, flags);
 491 }
 492
 493 /*-------------------------------------------------------------------------*
 494  * HC functions
 495  *-------------------------------------------------------------------------*/
 496
 497 /* init memory, and kick BIOS/SMM off */
 498
 499 static int ohci_init (struct ohci_hcd *ohci)
 500 {
 501         int ret;
 502         struct usb_hcd *hcd = ohci_to_hcd(ohci);
 503
 504         if (distrust_firmware)
 505                 ohci->flags |= OHCI_QUIRK_HUB_POWER;
 506
 507         disable (ohci);
 508         ohci->regs = hcd->regs;
 509
 510         /* REVISIT this BIOS handshake is now moved into PCI "quirks", and
 511          * was never needed for most non-PCI systems ... remove the code?
 512          */
 513
 514 #ifndef IR_DISABLE
 515         /* SMM owns the HC?  not for long! */
 516         if (!no_handshake && ohci_readl (ohci,
 517                                         &ohci->regs->control) & OHCI_CTRL_IR) {
 518                 u32 temp;
 519
 520                 ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n");
 521
 522                 /* this timeout is arbitrary.  we make it long, so systems
 523                  * depending on usb keyboards may be usable even if the
 524                  * BIOS/SMM code seems pretty broken.
 525                  */
 526                 temp = 500;     /* arbitrary: five seconds */
 527
 528                 ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable);
 529                 ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus);
 530                 while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) {
 531                         msleep (10);
 532                         if (--temp == 0) {
 533                                 ohci_err (ohci, "USB HC takeover failed!"
 534                                         "  (BIOS/SMM bug)\n");
 535                                 return -EBUSY;
 536                         }
 537                 }
 538                 ohci_usb_reset (ohci);
 539         }
 540 #endif
 541
 542         /* Disable HC interrupts */
 543         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 544
 545         /* flush the writes, and save key bits like RWC */
 546         if (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_RWC)
 547                 ohci->hc_control |= OHCI_CTRL_RWC;
 548
 549         /* Read the number of ports unless overridden */
 550         if (ohci->num_ports == 0)
 551                 ohci->num_ports = roothub_a(ohci) & RH_A_NDP;
 552
 553         if (ohci->hcca)
 554                 return 0;
 555
 556         ohci->hcca = dma_alloc_coherent (hcd->self.controller,
 557                         sizeof *ohci->hcca, &ohci->hcca_dma, 0);
 558         if (!ohci->hcca)
 559                 return -ENOMEM;
 560
 561         if ((ret = ohci_mem_init (ohci)) < 0)
 562                 ohci_stop (hcd);
 563         else {
 564                 create_debug_files (ohci);
 565         }
 566
 567         return ret;
 568 }
 569
 570 /*-------------------------------------------------------------------------*/
 571
 572 /* Start an OHCI controller, set the BUS operational
 573  * resets USB and controller
 574  * enable interrupts
 575  */
 576 static int ohci_run (struct ohci_hcd *ohci)
 577 {
 578         u32                     mask, val;
 579         int                     first = ohci->fminterval == 0;
 580         struct usb_hcd          *hcd = ohci_to_hcd(ohci);
 581
 582         disable (ohci);
 583
 584         /* boot firmware should have set this up (5.1.1.3.1) */
 585         if (first) {
 586
 587                 val = ohci_readl (ohci, &ohci->regs->fminterval);
 588                 ohci->fminterval = val & 0x3fff;
 589                 if (ohci->fminterval != FI)
 590                         ohci_dbg (ohci, "fminterval delta %d\n",
 591                                 ohci->fminterval - FI);
 592                 ohci->fminterval |= FSMP (ohci->fminterval) << 16;
 593                 /* also: power/overcurrent flags in roothub.a */
 594         }
 595
 596         /* Reset USB nearly "by the book".  RemoteWakeupConnected has
 597          * to be checked in case boot firmware (BIOS/SMM/...) has set up
 598          * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM).
 599          * If the bus glue detected wakeup capability then it should
 600          * already be enabled; if so we'll just enable it again.
 601          */
 602         if ((ohci->hc_control & OHCI_CTRL_RWC) != 0)
 603                 device_set_wakeup_capable(hcd->self.controller, 1);
 604
 605         switch (ohci->hc_control & OHCI_CTRL_HCFS) {
 606         case OHCI_USB_OPER:
 607                 val = 0;
 608                 break;
 609         case OHCI_USB_SUSPEND:
 610         case OHCI_USB_RESUME:
 611                 ohci->hc_control &= OHCI_CTRL_RWC;
 612                 ohci->hc_control |= OHCI_USB_RESUME;
 613                 val = 10 /* msec wait */;
 614                 break;
 615         // case OHCI_USB_RESET:
 616         default:
 617                 ohci->hc_control &= OHCI_CTRL_RWC;
 618                 ohci->hc_control |= OHCI_USB_RESET;
 619                 val = 50 /* msec wait */;
 620                 break;
 621         }
 622         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 623         // flush the writes
 624         (void) ohci_readl (ohci, &ohci->regs->control);
 625         msleep(val);
 626
 627         memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
 628
 629         /* 2msec timelimit here means no irqs/preempt */
 630         spin_lock_irq (&ohci->lock);
 631
 632 retry:
 633         /* HC Reset requires max 10 us delay */
 634         ohci_writel (ohci, OHCI_HCR,  &ohci->regs->cmdstatus);
 635         val = 30;       /* ... allow extra time */
 636         while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
 637                 if (--val == 0) {
 638                         spin_unlock_irq (&ohci->lock);
 639                         ohci_err (ohci, "USB HC reset timed out!\n");
 640                         return -1;
 641                 }
 642                 udelay (1);
 643         }
 644
 645         /* now we're in the SUSPEND state ... must go OPERATIONAL
 646          * within 2msec else HC enters RESUME
 647          *
 648          * ... but some hardware won't init fmInterval "by the book"
 649          * (SiS, OPTi ...), so reset again instead.  SiS doesn't need
 650          * this if we write fmInterval after we're OPERATIONAL.
 651          * Unclear about ALi, ServerWorks, and others ... this could
 652          * easily be a longstanding bug in chip init on Linux.
 653          */
 654         if (ohci->flags & OHCI_QUIRK_INITRESET) {
 655                 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 656                 // flush those writes
 657                 (void) ohci_readl (ohci, &ohci->regs->control);
 658         }
 659
 660         /* Tell the controller where the control and bulk lists are
 661          * The lists are empty now. */
 662         ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
 663         ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
 664
 665         /* a reset clears this */
 666         ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
 667
 668         periodic_reinit (ohci);
 669
 670         /* some OHCI implementations are finicky about how they init.
 671          * bogus values here mean not even enumeration could work.
 672          */
 673         if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
 674                         || !ohci_readl (ohci, &ohci->regs->periodicstart)) {
 675                 if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
 676                         ohci->flags |= OHCI_QUIRK_INITRESET;
 677                         ohci_dbg (ohci, "enabling initreset quirk\n");
 678                         goto retry;
 679                 }
 680                 spin_unlock_irq (&ohci->lock);
 681                 ohci_err (ohci, "init err (%08x %04x)\n",
 682                         ohci_readl (ohci, &ohci->regs->fminterval),
 683                         ohci_readl (ohci, &ohci->regs->periodicstart));
 684                 return -EOVERFLOW;
 685         }
 686
 687         /* use rhsc irqs after khubd is fully initialized */
 688         hcd->poll_rh = 1;
 689         hcd->uses_new_polling = 1;
 690
 691         /* start controller operations */
 692         ohci->hc_control &= OHCI_CTRL_RWC;
 693         ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
 694         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 695         hcd->state = HC_STATE_RUNNING;
 696
 697         /* wake on ConnectStatusChange, matching external hubs */
 698         ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
 699
 700         /* Choose the interrupts we care about now, others later on demand */
 701         mask = OHCI_INTR_INIT;
 702         ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
 703         ohci_writel (ohci, mask, &ohci->regs->intrenable);
 704
 705         /* handle root hub init quirks ... */
 706         val = roothub_a (ohci);
 707         val &= ~(RH_A_PSM | RH_A_OCPM);
 708         if (ohci->flags & OHCI_QUIRK_SUPERIO) {
 709                 /* NSC 87560 and maybe others */
 710                 val |= RH_A_NOCP;
 711                 val &= ~(RH_A_POTPGT | RH_A_NPS);
 712                 ohci_writel (ohci, val, &ohci->regs->roothub.a);
 713         } else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
 714                         (ohci->flags & OHCI_QUIRK_HUB_POWER)) {
 715                 /* hub power always on; required for AMD-756 and some
 716                  * Mac platforms.  ganged overcurrent reporting, if any.
 717                  */
 718                 val |= RH_A_NPS;
 719                 ohci_writel (ohci, val, &ohci->regs->roothub.a);
 720         }
 721         ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
 722         ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
 723                                                 &ohci->regs->roothub.b);
 724         // flush those writes
 725         (void) ohci_readl (ohci, &ohci->regs->control);
 726
 727         ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 728         spin_unlock_irq (&ohci->lock);
 729
 730         // POTPGT delay is bits 24-31, in 2 ms units.
 731         mdelay ((val >> 23) & 0x1fe);
 732         hcd->state = HC_STATE_RUNNING;
 733
 734         if (quirk_zfmicro(ohci)) {
 735                 /* Create timer to watch for bad queue state on ZF Micro */
 736                 setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
 737                                 (unsigned long) ohci);
 738
 739                 ohci->eds_scheduled = 0;
 740                 ohci->ed_to_check = NULL;
 741         }
 742
 743         ohci_dump (ohci, 1);
 744
 745         return 0;
 746 }
 747
 748 /*-------------------------------------------------------------------------*/
 749
 750 /* an interrupt happens */
 751
 752 static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 753 {
 754         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 755         struct ohci_regs __iomem *regs = ohci->regs;
 756         int                     ints;
 757
 758         /* Read interrupt status (and flush pending writes).  We ignore the
 759          * optimization of checking the LSB of hcca->done_head; it doesn't
 760          * work on all systems (edge triggering for OHCI can be a factor).
 761          */
 762         ints = ohci_readl(ohci, &regs->intrstatus);
 763
 764         /* Check for an all 1's result which is a typical consequence
 765          * of dead, unclocked, or unplugged (CardBus...) devices
 766          */
 767         if (ints == ~(u32)0) {
 768                 disable (ohci);
 769                 ohci_dbg (ohci, "device removed!\n");
 770                 return IRQ_HANDLED;
 771         }
 772
 773         /* We only care about interrupts that are enabled */
 774         ints &= ohci_readl(ohci, &regs->intrenable);
 775
 776         /* interrupt for some other device? */
 777         if (ints == 0)
 778                 return IRQ_NOTMINE;
 779
 780         if (ints & OHCI_INTR_UE) {
 781                 // e.g. due to PCI Master/Target Abort
 782                 if (quirk_nec(ohci)) {
 783                         /* Workaround for a silicon bug in some NEC chips used
 784                          * in Apple's PowerBooks. Adapted from Darwin code.
 785                          */
 786                         ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
 787
 788                         ohci_writel (ohci, OHCI_INTR_UE, &regs->intrdisable);
 789
 790                         schedule_work (&ohci->nec_work);
 791                 } else {
 792                         disable (ohci);
 793                         ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
 794                 }
 795
 796                 ohci_dump (ohci, 1);
 797                 ohci_usb_reset (ohci);
 798         }
 799
 800         if (ints & OHCI_INTR_RHSC) {
 801                 ohci_vdbg(ohci, "rhsc\n");
 802                 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 803                 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
 804                                 &regs->intrstatus);
 805
 806                 /* NOTE: Vendors didn't always make the same implementation
 807                  * choices for RHSC.  Many followed the spec; RHSC triggers
 808                  * on an edge, like setting and maybe clearing a port status
 809                  * change bit.  With others it's level-triggered, active
 810                  * until khubd clears all the port status change bits.  We'll
 811                  * always disable it here and rely on polling until khubd
 812                  * re-enables it.
 813                  */
 814                 ohci_writel(ohci, OHCI_INTR_RHSC, &regs->intrdisable);
 815                 usb_hcd_poll_rh_status(hcd);
 816         }
 817
 818         /* For connect and disconnect events, we expect the controller
 819          * to turn on RHSC along with RD.  But for remote wakeup events
 820          * this might not happen.
 821          */
 822         else if (ints & OHCI_INTR_RD) {
 823                 ohci_vdbg(ohci, "resume detect\n");
 824                 ohci_writel(ohci, OHCI_INTR_RD, &regs->intrstatus);
 825                 hcd->poll_rh = 1;
 826                 if (ohci->autostop) {
 827                         spin_lock (&ohci->lock);
 828                         ohci_rh_resume (ohci);
 829                         spin_unlock (&ohci->lock);
 830                 } else
 831                         usb_hcd_resume_root_hub(hcd);
 832         }
 833
 834         if (ints & OHCI_INTR_WDH) {
 835                 spin_lock (&ohci->lock);
 836                 dl_done_list (ohci);
 837                 spin_unlock (&ohci->lock);
 838         }
 839
 840         if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
 841                 spin_lock(&ohci->lock);
 842                 if (ohci->ed_to_check) {
 843                         struct ed *ed = ohci->ed_to_check;
 844
 845                         if (check_ed(ohci, ed)) {
 846                                 /* HC thinks the TD list is empty; HCD knows
 847                                  * at least one TD is outstanding
 848                                  */
 849                                 if (--ohci->zf_delay == 0) {
 850                                         struct td *td = list_entry(
 851                                                 ed->td_list.next,
 852                                                 struct td, td_list);
 853                                         ohci_warn(ohci,
 854                                                   "Reclaiming orphan TD %p\n",
 855                                                   td);
 856                                         takeback_td(ohci, td);
 857                                         ohci->ed_to_check = NULL;
 858                                 }
 859                         } else
 860                                 ohci->ed_to_check = NULL;
 861                 }
 862                 spin_unlock(&ohci->lock);
 863         }
 864
 865         /* could track INTR_SO to reduce available PCI/... bandwidth */
 866
 867         /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
 868          * when there's still unlinking to be done (next frame).
 869          */
 870         spin_lock (&ohci->lock);
 871         if (ohci->ed_rm_list)
 872                 finish_unlinks (ohci, ohci_frame_no(ohci));
 873         if ((ints & OHCI_INTR_SF) != 0
 874                         && !ohci->ed_rm_list
 875                         && !ohci->ed_to_check
 876                         && HC_IS_RUNNING(hcd->state))
 877                 ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
 878         spin_unlock (&ohci->lock);
 879
 880         if (HC_IS_RUNNING(hcd->state)) {
 881                 ohci_writel (ohci, ints, &regs->intrstatus);
 882                 ohci_writel (ohci, OHCI_INTR_MIE, &regs->intrenable);
 883                 // flush those writes
 884                 (void) ohci_readl (ohci, &ohci->regs->control);
 885         }
 886
 887         return IRQ_HANDLED;
 888 }
 889
 890 /*-------------------------------------------------------------------------*/
 891
 892 static void ohci_stop (struct usb_hcd *hcd)
 893 {
 894         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 895
 896         ohci_dump (ohci, 1);
 897
 898         flush_scheduled_work();
 899
 900         ohci_usb_reset (ohci);
 901         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 902         free_irq(hcd->irq, hcd);
 903         hcd->irq = -1;
 904
 905         if (quirk_zfmicro(ohci))
 906                 del_timer(&ohci->unlink_watchdog);
 907         if (quirk_amdiso(ohci))
 908                 amd_iso_dev_put();
 909
 910         remove_debug_files (ohci);
 911         ohci_mem_cleanup (ohci);
 912         if (ohci->hcca) {
 913                 dma_free_coherent (hcd->self.controller,
 914                                 sizeof *ohci->hcca,
 915                                 ohci->hcca, ohci->hcca_dma);
 916                 ohci->hcca = NULL;
 917                 ohci->hcca_dma = 0;
 918         }
 919 }
 920
 921 /*-------------------------------------------------------------------------*/
 922
 923 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
 924
 925 /* must not be called from interrupt context */
 926 static int ohci_restart (struct ohci_hcd *ohci)
 927 {
 928         int temp;
 929         int i;
 930         struct urb_priv *priv;
 931
 932         spin_lock_irq(&ohci->lock);
 933         disable (ohci);
 934
 935         /* Recycle any "live" eds/tds (and urbs). */
 936         if (!list_empty (&ohci->pending))
 937                 ohci_dbg(ohci, "abort schedule...\n");
 938         list_for_each_entry (priv, &ohci->pending, pending) {
 939                 struct urb      *urb = priv->td[0]->urb;
 940                 struct ed       *ed = priv->ed;
 941
 942                 switch (ed->state) {
 943                 case ED_OPER:
 944                         ed->state = ED_UNLINK;
 945                         ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
 946                         ed_deschedule (ohci, ed);
 947
 948                         ed->ed_next = ohci->ed_rm_list;
 949                         ed->ed_prev = NULL;
 950                         ohci->ed_rm_list = ed;
 951                         /* FALLTHROUGH */
 952                 case ED_UNLINK:
 953                         break;
 954                 default:
 955                         ohci_dbg(ohci, "bogus ed %p state %d\n",
 956                                         ed, ed->state);
 957                 }
 958
 959                 if (!urb->unlinked)
 960                         urb->unlinked = -ESHUTDOWN;
 961         }
 962         finish_unlinks (ohci, 0);
 963         spin_unlock_irq(&ohci->lock);
 964
 965         /* paranoia, in case that didn't work: */
 966
 967         /* empty the interrupt branches */
 968         for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
 969         for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
 970
 971         /* no EDs to remove */
 972         ohci->ed_rm_list = NULL;
 973
 974         /* empty control and bulk lists */
 975         ohci->ed_controltail = NULL;
 976         ohci->ed_bulktail    = NULL;
 977
 978         if ((temp = ohci_run (ohci)) < 0) {
 979                 ohci_err (ohci, "can't restart, %d\n", temp);
 980                 return temp;
 981         }
 982         ohci_dbg(ohci, "restart complete\n");
 983         return 0;
 984 }
 985
 986 #endif
 987
 988 /*-------------------------------------------------------------------------*/
 989
 990 MODULE_AUTHOR (DRIVER_AUTHOR);
 991 MODULE_DESCRIPTION(DRIVER_DESC);
 992 MODULE_LICENSE ("GPL");
 993
 994 #ifdef CONFIG_PCI
 995 #include "ohci-pci.c"
 996 #define PCI_DRIVER              ohci_pci_driver
 997 #endif
 998
 999 #if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
1000 #include "ohci-sa1111.c"
1001 #define SA1111_DRIVER           ohci_hcd_sa1111_driver
1002 #endif
1003
1004 #if defined(CONFIG_ARCH_S3C2410) || defined(CONFIG_ARCH_S3C64XX)
1005 #include "ohci-s3c2410.c"
1006 #define PLATFORM_DRIVER         ohci_hcd_s3c2410_driver
1007 #endif
1008
1009 #ifdef CONFIG_ARCH_OMAP
1010 #include "ohci-omap.c"
1011 #define PLATFORM_DRIVER         ohci_hcd_omap_driver
1012 #endif
1013
1014 #ifdef CONFIG_ARCH_LH7A404
1015 #include "ohci-lh7a404.c"
1016 #define PLATFORM_DRIVER         ohci_hcd_lh7a404_driver
1017 #endif
1018
1019 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
1020 #include "ohci-pxa27x.c"
1021 #define PLATFORM_DRIVER         ohci_hcd_pxa27x_driver
1022 #endif
1023
1024 #ifdef CONFIG_ARCH_EP93XX
1025 #include "ohci-ep93xx.c"
1026 #define PLATFORM_DRIVER         ohci_hcd_ep93xx_driver
1027 #endif
1028
1029 #ifdef CONFIG_SOC_AU1X00
1030 #include "ohci-au1xxx.c"
1031 #define PLATFORM_DRIVER         ohci_hcd_au1xxx_driver
1032 #endif
1033
1034 #ifdef CONFIG_PNX8550
1035 #include "ohci-pnx8550.c"
1036 #define PLATFORM_DRIVER         ohci_hcd_pnx8550_driver
1037 #endif
1038
1039 #ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
1040 #include "ohci-ppc-soc.c"
1041 #define PLATFORM_DRIVER         ohci_hcd_ppc_soc_driver
1042 #endif
1043
1044 #ifdef CONFIG_ARCH_AT91
1045 #include "ohci-at91.c"
1046 #define PLATFORM_DRIVER         ohci_hcd_at91_driver
1047 #endif
1048
1049 #ifdef CONFIG_ARCH_PNX4008
1050 #include "ohci-pnx4008.c"
1051 #define PLATFORM_DRIVER         usb_hcd_pnx4008_driver
1052 #endif
1053
1054 #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
1055     defined(CONFIG_CPU_SUBTYPE_SH7721) || \
1056     defined(CONFIG_CPU_SUBTYPE_SH7763) || \
1057     defined(CONFIG_CPU_SUBTYPE_SH7786)
1058 #include "ohci-sh.c"
1059 #define PLATFORM_DRIVER         ohci_hcd_sh_driver
1060 #endif
1061
1062
1063 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF
1064 #include "ohci-ppc-of.c"
1065 #define OF_PLATFORM_DRIVER      ohci_hcd_ppc_of_driver
1066 #endif
1067
1068 #ifdef CONFIG_PPC_PS3
1069 #include "ohci-ps3.c"
1070 #define PS3_SYSTEM_BUS_DRIVER   ps3_ohci_driver
1071 #endif
1072
1073 #ifdef CONFIG_USB_OHCI_HCD_SSB
1074 #include "ohci-ssb.c"
1075 #define SSB_OHCI_DRIVER         ssb_ohci_driver
1076 #endif
1077
1078 #ifdef CONFIG_MFD_SM501
1079 #include "ohci-sm501.c"
1080 #define SM501_OHCI_DRIVER       ohci_hcd_sm501_driver
1081 #endif
1082
1083 #ifdef CONFIG_MFD_TC6393XB
1084 #include "ohci-tmio.c"
1085 #define TMIO_OHCI_DRIVER        ohci_hcd_tmio_driver
1086 #endif
1087
1088 #if     !defined(PCI_DRIVER) &&         \
1089         !defined(PLATFORM_DRIVER) &&    \
1090         !defined(OF_PLATFORM_DRIVER) && \
1091         !defined(SA1111_DRIVER) &&      \
1092         !defined(PS3_SYSTEM_BUS_DRIVER) && \
1093         !defined(SM501_OHCI_DRIVER) && \
1094         !defined(TMIO_OHCI_DRIVER) && \
1095         !defined(SSB_OHCI_DRIVER)
1096 #error "missing bus glue for ohci-hcd"
1097 #endif
1098
1099 static int __init ohci_hcd_mod_init(void)
1100 {
1101         int retval = 0;
1102
1103         if (usb_disabled())
1104                 return -ENODEV;
1105
1106         printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1107         pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
1108                 sizeof (struct ed), sizeof (struct td));
1109         set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1110
1111 #ifdef DEBUG
1112         ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root);
1113         if (!ohci_debug_root) {
1114                 retval = -ENOENT;
1115                 goto error_debug;
1116         }
1117 #endif
1118
1119 #ifdef PS3_SYSTEM_BUS_DRIVER
1120         retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1121         if (retval < 0)
1122                 goto error_ps3;
1123 #endif
1124
1125 #ifdef PLATFORM_DRIVER
1126         retval = platform_driver_register(&PLATFORM_DRIVER);
1127         if (retval < 0)
1128                 goto error_platform;
1129 #endif
1130
1131 #ifdef OF_PLATFORM_DRIVER
1132         retval = of_register_platform_driver(&OF_PLATFORM_DRIVER);
1133         if (retval < 0)
1134                 goto error_of_platform;
1135 #endif
1136
1137 #ifdef SA1111_DRIVER
1138         retval = sa1111_driver_register(&SA1111_DRIVER);
1139         if (retval < 0)
1140                 goto error_sa1111;
1141 #endif
1142
1143 #ifdef PCI_DRIVER
1144         retval = pci_register_driver(&PCI_DRIVER);
1145         if (retval < 0)
1146                 goto error_pci;
1147 #endif
1148
1149 #ifdef SSB_OHCI_DRIVER
1150         retval = ssb_driver_register(&SSB_OHCI_DRIVER);
1151         if (retval)
1152                 goto error_ssb;
1153 #endif
1154
1155 #ifdef SM501_OHCI_DRIVER
1156         retval = platform_driver_register(&SM501_OHCI_DRIVER);
1157         if (retval < 0)
1158                 goto error_sm501;
1159 #endif
1160
1161 #ifdef TMIO_OHCI_DRIVER
1162         retval = platform_driver_register(&TMIO_OHCI_DRIVER);
1163         if (retval < 0)
1164                 goto error_tmio;
1165 #endif
1166
1167         return retval;
1168
1169         /* Error path */
1170 #ifdef TMIO_OHCI_DRIVER
1171         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1172  error_tmio:
1173 #endif
1174 #ifdef SM501_OHCI_DRIVER
1175         platform_driver_unregister(&SM501_OHCI_DRIVER);
1176  error_sm501:
1177 #endif
1178 #ifdef SSB_OHCI_DRIVER
1179         ssb_driver_unregister(&SSB_OHCI_DRIVER);
1180  error_ssb:
1181 #endif
1182 #ifdef PCI_DRIVER
1183         pci_unregister_driver(&PCI_DRIVER);
1184  error_pci:
1185 #endif
1186 #ifdef SA1111_DRIVER
1187         sa1111_driver_unregister(&SA1111_DRIVER);
1188  error_sa1111:
1189 #endif
1190 #ifdef OF_PLATFORM_DRIVER
1191         of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1192  error_of_platform:
1193 #endif
1194 #ifdef PLATFORM_DRIVER
1195         platform_driver_unregister(&PLATFORM_DRIVER);
1196  error_platform:
1197 #endif
1198 #ifdef PS3_SYSTEM_BUS_DRIVER
1199         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1200  error_ps3:
1201 #endif
1202 #ifdef DEBUG
1203         debugfs_remove(ohci_debug_root);
1204         ohci_debug_root = NULL;
1205  error_debug:
1206 #endif
1207
1208         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1209         return retval;
1210 }
1211 module_init(ohci_hcd_mod_init);
1212
1213 static void __exit ohci_hcd_mod_exit(void)
1214 {
1215 #ifdef TMIO_OHCI_DRIVER
1216         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1217 #endif
1218 #ifdef SM501_OHCI_DRIVER
1219         platform_driver_unregister(&SM501_OHCI_DRIVER);
1220 #endif
1221 #ifdef SSB_OHCI_DRIVER
1222         ssb_driver_unregister(&SSB_OHCI_DRIVER);
1223 #endif
1224 #ifdef PCI_DRIVER
1225         pci_unregister_driver(&PCI_DRIVER);
1226 #endif
1227 #ifdef SA1111_DRIVER
1228         sa1111_driver_unregister(&SA1111_DRIVER);
1229 #endif
1230 #ifdef OF_PLATFORM_DRIVER
1231         of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1232 #endif
1233 #ifdef PLATFORM_DRIVER
1234         platform_driver_unregister(&PLATFORM_DRIVER);
1235 #endif
1236 #ifdef PS3_SYSTEM_BUS_DRIVER
1237         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1238 #endif
1239 #ifdef DEBUG
1240         debugfs_remove(ohci_debug_root);
1241 #endif
1242         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1243 }
1244 module_exit(ohci_hcd_mod_exit);
1245