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.  Either way, if wakeup should be enabled
 597          * but isn't, we'll enable it now.
 598          */
 599         if ((ohci->hc_control & OHCI_CTRL_RWC) != 0
 600                         && !device_can_wakeup(hcd->self.controller))
 601                 device_init_wakeup(hcd->self.controller, 1);
 602
 603         switch (ohci->hc_control & OHCI_CTRL_HCFS) {
 604         case OHCI_USB_OPER:
 605                 temp = 0;
 606                 break;
 607         case OHCI_USB_SUSPEND:
 608         case OHCI_USB_RESUME:
 609                 ohci->hc_control &= OHCI_CTRL_RWC;
 610                 ohci->hc_control |= OHCI_USB_RESUME;
 611                 temp = 10 /* msec wait */;
 612                 break;
 613         // case OHCI_USB_RESET:
 614         default:
 615                 ohci->hc_control &= OHCI_CTRL_RWC;
 616                 ohci->hc_control |= OHCI_USB_RESET;
 617                 temp = 50 /* msec wait */;
 618                 break;
 619         }
 620         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 621         // flush the writes
 622         (void) ohci_readl (ohci, &ohci->regs->control);
 623         msleep(temp);
 624
 625         memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
 626
 627         /* 2msec timelimit here means no irqs/preempt */
 628         spin_lock_irq (&ohci->lock);
 629
 630 retry:
 631         /* HC Reset requires max 10 us delay */
 632         ohci_writel (ohci, OHCI_HCR,  &ohci->regs->cmdstatus);
 633         temp = 30;      /* ... allow extra time */
 634         while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
 635                 if (--temp == 0) {
 636                         spin_unlock_irq (&ohci->lock);
 637                         ohci_err (ohci, "USB HC reset timed out!\n");
 638                         return -1;
 639                 }
 640                 udelay (1);
 641         }
 642
 643         /* now we're in the SUSPEND state ... must go OPERATIONAL
 644          * within 2msec else HC enters RESUME
 645          *
 646          * ... but some hardware won't init fmInterval "by the book"
 647          * (SiS, OPTi ...), so reset again instead.  SiS doesn't need
 648          * this if we write fmInterval after we're OPERATIONAL.
 649          * Unclear about ALi, ServerWorks, and others ... this could
 650          * easily be a longstanding bug in chip init on Linux.
 651          */
 652         if (ohci->flags & OHCI_QUIRK_INITRESET) {
 653                 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 654                 // flush those writes
 655                 (void) ohci_readl (ohci, &ohci->regs->control);
 656         }
 657
 658         /* Tell the controller where the control and bulk lists are
 659          * The lists are empty now. */
 660         ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
 661         ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
 662
 663         /* a reset clears this */
 664         ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
 665
 666         periodic_reinit (ohci);
 667
 668         /* some OHCI implementations are finicky about how they init.
 669          * bogus values here mean not even enumeration could work.
 670          */
 671         if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
 672                         || !ohci_readl (ohci, &ohci->regs->periodicstart)) {
 673                 if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
 674                         ohci->flags |= OHCI_QUIRK_INITRESET;
 675                         ohci_dbg (ohci, "enabling initreset quirk\n");
 676                         goto retry;
 677                 }
 678                 spin_unlock_irq (&ohci->lock);
 679                 ohci_err (ohci, "init err (%08x %04x)\n",
 680                         ohci_readl (ohci, &ohci->regs->fminterval),
 681                         ohci_readl (ohci, &ohci->regs->periodicstart));
 682                 return -EOVERFLOW;
 683         }
 684
 685         /* use rhsc irqs after khubd is fully initialized */
 686         hcd->poll_rh = 1;
 687         hcd->uses_new_polling = 1;
 688
 689         /* start controller operations */
 690         ohci->hc_control &= OHCI_CTRL_RWC;
 691         ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
 692         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 693         hcd->state = HC_STATE_RUNNING;
 694
 695         /* wake on ConnectStatusChange, matching external hubs */
 696         ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
 697
 698         /* Choose the interrupts we care about now, others later on demand */
 699         mask = OHCI_INTR_INIT;
 700         ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
 701         ohci_writel (ohci, mask, &ohci->regs->intrenable);
 702
 703         /* handle root hub init quirks ... */
 704         temp = roothub_a (ohci);
 705         temp &= ~(RH_A_PSM | RH_A_OCPM);
 706         if (ohci->flags & OHCI_QUIRK_SUPERIO) {
 707                 /* NSC 87560 and maybe others */
 708                 temp |= RH_A_NOCP;
 709                 temp &= ~(RH_A_POTPGT | RH_A_NPS);
 710                 ohci_writel (ohci, temp, &ohci->regs->roothub.a);
 711         } else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
 712                         (ohci->flags & OHCI_QUIRK_HUB_POWER)) {
 713                 /* hub power always on; required for AMD-756 and some
 714                  * Mac platforms.  ganged overcurrent reporting, if any.
 715                  */
 716                 temp |= RH_A_NPS;
 717                 ohci_writel (ohci, temp, &ohci->regs->roothub.a);
 718         }
 719         ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
 720         ohci_writel (ohci, (temp & RH_A_NPS) ? 0 : RH_B_PPCM,
 721                                                 &ohci->regs->roothub.b);
 722         // flush those writes
 723         (void) ohci_readl (ohci, &ohci->regs->control);
 724
 725         ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 726         spin_unlock_irq (&ohci->lock);
 727
 728         // POTPGT delay is bits 24-31, in 2 ms units.
 729         mdelay ((temp >> 23) & 0x1fe);
 730         hcd->state = HC_STATE_RUNNING;
 731
 732         if (quirk_zfmicro(ohci)) {
 733                 /* Create timer to watch for bad queue state on ZF Micro */
 734                 setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
 735                                 (unsigned long) ohci);
 736
 737                 ohci->eds_scheduled = 0;
 738                 ohci->ed_to_check = NULL;
 739         }
 740
 741         ohci_dump (ohci, 1);
 742
 743         return 0;
 744 }
 745
 746 /*-------------------------------------------------------------------------*/
 747
 748 /* an interrupt happens */
 749
 750 static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 751 {
 752         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 753         struct ohci_regs __iomem *regs = ohci->regs;
 754         int                     ints;
 755
 756         /* Read interrupt status (and flush pending writes).  We ignore the
 757          * optimization of checking the LSB of hcca->done_head; it doesn't
 758          * work on all systems (edge triggering for OHCI can be a factor).
 759          */
 760         ints = ohci_readl(ohci, &regs->intrstatus);
 761
 762         /* Check for an all 1's result which is a typical consequence
 763          * of dead, unclocked, or unplugged (CardBus...) devices
 764          */
 765         if (ints == ~(u32)0) {
 766                 disable (ohci);
 767                 ohci_dbg (ohci, "device removed!\n");
 768                 return IRQ_HANDLED;
 769         }
 770
 771         /* We only care about interrupts that are enabled */
 772         ints &= ohci_readl(ohci, &regs->intrenable);
 773
 774         /* interrupt for some other device? */
 775         if (ints == 0)
 776                 return IRQ_NOTMINE;
 777
 778         if (ints & OHCI_INTR_UE) {
 779                 // e.g. due to PCI Master/Target Abort
 780                 if (quirk_nec(ohci)) {
 781                         /* Workaround for a silicon bug in some NEC chips used
 782                          * in Apple's PowerBooks. Adapted from Darwin code.
 783                          */
 784                         ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
 785
 786                         ohci_writel (ohci, OHCI_INTR_UE, &regs->intrdisable);
 787
 788                         schedule_work (&ohci->nec_work);
 789                 } else {
 790                         disable (ohci);
 791                         ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
 792                 }
 793
 794                 ohci_dump (ohci, 1);
 795                 ohci_usb_reset (ohci);
 796         }
 797
 798         if (ints & OHCI_INTR_RHSC) {
 799                 ohci_vdbg(ohci, "rhsc\n");
 800                 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 801                 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
 802                                 &regs->intrstatus);
 803
 804                 /* NOTE: Vendors didn't always make the same implementation
 805                  * choices for RHSC.  Many followed the spec; RHSC triggers
 806                  * on an edge, like setting and maybe clearing a port status
 807                  * change bit.  With others it's level-triggered, active
 808                  * until khubd clears all the port status change bits.  We'll
 809                  * always disable it here and rely on polling until khubd
 810                  * re-enables it.
 811                  */
 812                 ohci_writel(ohci, OHCI_INTR_RHSC, &regs->intrdisable);
 813                 usb_hcd_poll_rh_status(hcd);
 814         }
 815
 816         /* For connect and disconnect events, we expect the controller
 817          * to turn on RHSC along with RD.  But for remote wakeup events
 818          * this might not happen.
 819          */
 820         else if (ints & OHCI_INTR_RD) {
 821                 ohci_vdbg(ohci, "resume detect\n");
 822                 ohci_writel(ohci, OHCI_INTR_RD, &regs->intrstatus);
 823                 hcd->poll_rh = 1;
 824                 if (ohci->autostop) {
 825                         spin_lock (&ohci->lock);
 826                         ohci_rh_resume (ohci);
 827                         spin_unlock (&ohci->lock);
 828                 } else
 829                         usb_hcd_resume_root_hub(hcd);
 830         }
 831
 832         if (ints & OHCI_INTR_WDH) {
 833                 spin_lock (&ohci->lock);
 834                 dl_done_list (ohci);
 835                 spin_unlock (&ohci->lock);
 836         }
 837
 838         if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
 839                 spin_lock(&ohci->lock);
 840                 if (ohci->ed_to_check) {
 841                         struct ed *ed = ohci->ed_to_check;
 842
 843                         if (check_ed(ohci, ed)) {
 844                                 /* HC thinks the TD list is empty; HCD knows
 845                                  * at least one TD is outstanding
 846                                  */
 847                                 if (--ohci->zf_delay == 0) {
 848                                         struct td *td = list_entry(
 849                                                 ed->td_list.next,
 850                                                 struct td, td_list);
 851                                         ohci_warn(ohci,
 852                                                   "Reclaiming orphan TD %p\n",
 853                                                   td);
 854                                         takeback_td(ohci, td);
 855                                         ohci->ed_to_check = NULL;
 856                                 }
 857                         } else
 858                                 ohci->ed_to_check = NULL;
 859                 }
 860                 spin_unlock(&ohci->lock);
 861         }
 862
 863         /* could track INTR_SO to reduce available PCI/... bandwidth */
 864
 865         /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
 866          * when there's still unlinking to be done (next frame).
 867          */
 868         spin_lock (&ohci->lock);
 869         if (ohci->ed_rm_list)
 870                 finish_unlinks (ohci, ohci_frame_no(ohci));
 871         if ((ints & OHCI_INTR_SF) != 0
 872                         && !ohci->ed_rm_list
 873                         && !ohci->ed_to_check
 874                         && HC_IS_RUNNING(hcd->state))
 875                 ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
 876         spin_unlock (&ohci->lock);
 877
 878         if (HC_IS_RUNNING(hcd->state)) {
 879                 ohci_writel (ohci, ints, &regs->intrstatus);
 880                 ohci_writel (ohci, OHCI_INTR_MIE, &regs->intrenable);
 881                 // flush those writes
 882                 (void) ohci_readl (ohci, &ohci->regs->control);
 883         }
 884
 885         return IRQ_HANDLED;
 886 }
 887
 888 /*-------------------------------------------------------------------------*/
 889
 890 static void ohci_stop (struct usb_hcd *hcd)
 891 {
 892         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 893
 894         ohci_dump (ohci, 1);
 895
 896         flush_scheduled_work();
 897
 898         ohci_usb_reset (ohci);
 899         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 900         free_irq(hcd->irq, hcd);
 901         hcd->irq = -1;
 902
 903         if (quirk_zfmicro(ohci))
 904                 del_timer(&ohci->unlink_watchdog);
 905         if (quirk_amdiso(ohci))
 906                 amd_iso_dev_put();
 907
 908         remove_debug_files (ohci);
 909         ohci_mem_cleanup (ohci);
 910         if (ohci->hcca) {
 911                 dma_free_coherent (hcd->self.controller,
 912                                 sizeof *ohci->hcca,
 913                                 ohci->hcca, ohci->hcca_dma);
 914                 ohci->hcca = NULL;
 915                 ohci->hcca_dma = 0;
 916         }
 917 }
 918
 919 /*-------------------------------------------------------------------------*/
 920
 921 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
 922
 923 /* must not be called from interrupt context */
 924 static int ohci_restart (struct ohci_hcd *ohci)
 925 {
 926         int temp;
 927         int i;
 928         struct urb_priv *priv;
 929
 930         spin_lock_irq(&ohci->lock);
 931         disable (ohci);
 932
 933         /* Recycle any "live" eds/tds (and urbs). */
 934         if (!list_empty (&ohci->pending))
 935                 ohci_dbg(ohci, "abort schedule...\n");
 936         list_for_each_entry (priv, &ohci->pending, pending) {
 937                 struct urb      *urb = priv->td[0]->urb;
 938                 struct ed       *ed = priv->ed;
 939
 940                 switch (ed->state) {
 941                 case ED_OPER:
 942                         ed->state = ED_UNLINK;
 943                         ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
 944                         ed_deschedule (ohci, ed);
 945
 946                         ed->ed_next = ohci->ed_rm_list;
 947                         ed->ed_prev = NULL;
 948                         ohci->ed_rm_list = ed;
 949                         /* FALLTHROUGH */
 950                 case ED_UNLINK:
 951                         break;
 952                 default:
 953                         ohci_dbg(ohci, "bogus ed %p state %d\n",
 954                                         ed, ed->state);
 955                 }
 956
 957                 if (!urb->unlinked)
 958                         urb->unlinked = -ESHUTDOWN;
 959         }
 960         finish_unlinks (ohci, 0);
 961         spin_unlock_irq(&ohci->lock);
 962
 963         /* paranoia, in case that didn't work: */
 964
 965         /* empty the interrupt branches */
 966         for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
 967         for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
 968
 969         /* no EDs to remove */
 970         ohci->ed_rm_list = NULL;
 971
 972         /* empty control and bulk lists */
 973         ohci->ed_controltail = NULL;
 974         ohci->ed_bulktail    = NULL;
 975
 976         if ((temp = ohci_run (ohci)) < 0) {
 977                 ohci_err (ohci, "can't restart, %d\n", temp);
 978                 return temp;
 979         }
 980         ohci_dbg(ohci, "restart complete\n");
 981         return 0;
 982 }
 983
 984 #endif
 985
 986 /*-------------------------------------------------------------------------*/
 987
 988 MODULE_AUTHOR (DRIVER_AUTHOR);
 989 MODULE_DESCRIPTION(DRIVER_DESC);
 990 MODULE_LICENSE ("GPL");
 991
 992 #ifdef CONFIG_PCI
 993 #include "ohci-pci.c"
 994 #define PCI_DRIVER              ohci_pci_driver
 995 #endif
 996
 997 #if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
 998 #include "ohci-sa1111.c"
 999 #define SA1111_DRIVER           ohci_hcd_sa1111_driver
1000 #endif
1001
1002 #ifdef CONFIG_ARCH_S3C2410
1003 #include "ohci-s3c2410.c"
1004 #define PLATFORM_DRIVER         ohci_hcd_s3c2410_driver
1005 #endif
1006
1007 #ifdef CONFIG_ARCH_OMAP
1008 #include "ohci-omap.c"
1009 #define PLATFORM_DRIVER         ohci_hcd_omap_driver
1010 #endif
1011
1012 #ifdef CONFIG_ARCH_LH7A404
1013 #include "ohci-lh7a404.c"
1014 #define PLATFORM_DRIVER         ohci_hcd_lh7a404_driver
1015 #endif
1016
1017 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
1018 #include "ohci-pxa27x.c"
1019 #define PLATFORM_DRIVER         ohci_hcd_pxa27x_driver
1020 #endif
1021
1022 #ifdef CONFIG_ARCH_EP93XX
1023 #include "ohci-ep93xx.c"
1024 #define PLATFORM_DRIVER         ohci_hcd_ep93xx_driver
1025 #endif
1026
1027 #ifdef CONFIG_SOC_AU1X00
1028 #include "ohci-au1xxx.c"
1029 #define PLATFORM_DRIVER         ohci_hcd_au1xxx_driver
1030 #endif
1031
1032 #ifdef CONFIG_PNX8550
1033 #include "ohci-pnx8550.c"
1034 #define PLATFORM_DRIVER         ohci_hcd_pnx8550_driver
1035 #endif
1036
1037 #ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
1038 #include "ohci-ppc-soc.c"
1039 #define PLATFORM_DRIVER         ohci_hcd_ppc_soc_driver
1040 #endif
1041
1042 #ifdef CONFIG_ARCH_AT91
1043 #include "ohci-at91.c"
1044 #define PLATFORM_DRIVER         ohci_hcd_at91_driver
1045 #endif
1046
1047 #ifdef CONFIG_ARCH_PNX4008
1048 #include "ohci-pnx4008.c"
1049 #define PLATFORM_DRIVER         usb_hcd_pnx4008_driver
1050 #endif
1051
1052 #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
1053     defined(CONFIG_CPU_SUBTYPE_SH7721) || \
1054     defined(CONFIG_CPU_SUBTYPE_SH7763)
1055 #include "ohci-sh.c"
1056 #define PLATFORM_DRIVER         ohci_hcd_sh_driver
1057 #endif
1058
1059
1060 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF
1061 #include "ohci-ppc-of.c"
1062 #define OF_PLATFORM_DRIVER      ohci_hcd_ppc_of_driver
1063 #endif
1064
1065 #ifdef CONFIG_PPC_PS3
1066 #include "ohci-ps3.c"
1067 #define PS3_SYSTEM_BUS_DRIVER   ps3_ohci_driver
1068 #endif
1069
1070 #ifdef CONFIG_USB_OHCI_HCD_SSB
1071 #include "ohci-ssb.c"
1072 #define SSB_OHCI_DRIVER         ssb_ohci_driver
1073 #endif
1074
1075 #ifdef CONFIG_MFD_SM501
1076 #include "ohci-sm501.c"
1077 #define SM501_OHCI_DRIVER       ohci_hcd_sm501_driver
1078 #endif
1079
1080 #ifdef CONFIG_MFD_TC6393XB
1081 #include "ohci-tmio.c"
1082 #define TMIO_OHCI_DRIVER        ohci_hcd_tmio_driver
1083 #endif
1084
1085 #if     !defined(PCI_DRIVER) &&         \
1086         !defined(PLATFORM_DRIVER) &&    \
1087         !defined(OF_PLATFORM_DRIVER) && \
1088         !defined(SA1111_DRIVER) &&      \
1089         !defined(PS3_SYSTEM_BUS_DRIVER) && \
1090         !defined(SM501_OHCI_DRIVER) && \
1091         !defined(TMIO_OHCI_DRIVER) && \
1092         !defined(SSB_OHCI_DRIVER)
1093 #error "missing bus glue for ohci-hcd"
1094 #endif
1095
1096 static int __init ohci_hcd_mod_init(void)
1097 {
1098         int retval = 0;
1099
1100         if (usb_disabled())
1101                 return -ENODEV;
1102
1103         printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1104         pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
1105                 sizeof (struct ed), sizeof (struct td));
1106         set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1107
1108 #ifdef DEBUG
1109         ohci_debug_root = debugfs_create_dir("ohci", NULL);
1110         if (!ohci_debug_root) {
1111                 retval = -ENOENT;
1112                 goto error_debug;
1113         }
1114 #endif
1115
1116 #ifdef PS3_SYSTEM_BUS_DRIVER
1117         retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1118         if (retval < 0)
1119                 goto error_ps3;
1120 #endif
1121
1122 #ifdef PLATFORM_DRIVER
1123         retval = platform_driver_register(&PLATFORM_DRIVER);
1124         if (retval < 0)
1125                 goto error_platform;
1126 #endif
1127
1128 #ifdef OF_PLATFORM_DRIVER
1129         retval = of_register_platform_driver(&OF_PLATFORM_DRIVER);
1130         if (retval < 0)
1131                 goto error_of_platform;
1132 #endif
1133
1134 #ifdef SA1111_DRIVER
1135         retval = sa1111_driver_register(&SA1111_DRIVER);
1136         if (retval < 0)
1137                 goto error_sa1111;
1138 #endif
1139
1140 #ifdef PCI_DRIVER
1141         retval = pci_register_driver(&PCI_DRIVER);
1142         if (retval < 0)
1143                 goto error_pci;
1144 #endif
1145
1146 #ifdef SSB_OHCI_DRIVER
1147         retval = ssb_driver_register(&SSB_OHCI_DRIVER);
1148         if (retval)
1149                 goto error_ssb;
1150 #endif
1151
1152 #ifdef SM501_OHCI_DRIVER
1153         retval = platform_driver_register(&SM501_OHCI_DRIVER);
1154         if (retval < 0)
1155                 goto error_sm501;
1156 #endif
1157
1158 #ifdef TMIO_OHCI_DRIVER
1159         retval = platform_driver_register(&TMIO_OHCI_DRIVER);
1160         if (retval < 0)
1161                 goto error_tmio;
1162 #endif
1163
1164         return retval;
1165
1166         /* Error path */
1167 #ifdef TMIO_OHCI_DRIVER
1168         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1169  error_tmio:
1170 #endif
1171 #ifdef SM501_OHCI_DRIVER
1172         platform_driver_unregister(&SM501_OHCI_DRIVER);
1173  error_sm501:
1174 #endif
1175 #ifdef SSB_OHCI_DRIVER
1176         ssb_driver_unregister(&SSB_OHCI_DRIVER);
1177  error_ssb:
1178 #endif
1179 #ifdef PCI_DRIVER
1180         pci_unregister_driver(&PCI_DRIVER);
1181  error_pci:
1182 #endif
1183 #ifdef SA1111_DRIVER
1184         sa1111_driver_unregister(&SA1111_DRIVER);
1185  error_sa1111:
1186 #endif
1187 #ifdef OF_PLATFORM_DRIVER
1188         of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1189  error_of_platform:
1190 #endif
1191 #ifdef PLATFORM_DRIVER
1192         platform_driver_unregister(&PLATFORM_DRIVER);
1193  error_platform:
1194 #endif
1195 #ifdef PS3_SYSTEM_BUS_DRIVER
1196         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1197  error_ps3:
1198 #endif
1199 #ifdef DEBUG
1200         debugfs_remove(ohci_debug_root);
1201         ohci_debug_root = NULL;
1202  error_debug:
1203 #endif
1204
1205         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1206         return retval;
1207 }
1208 module_init(ohci_hcd_mod_init);
1209
1210 static void __exit ohci_hcd_mod_exit(void)
1211 {
1212 #ifdef TMIO_OHCI_DRIVER
1213         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1214 #endif
1215 #ifdef SM501_OHCI_DRIVER
1216         platform_driver_unregister(&SM501_OHCI_DRIVER);
1217 #endif
1218 #ifdef SSB_OHCI_DRIVER
1219         ssb_driver_unregister(&SSB_OHCI_DRIVER);
1220 #endif
1221 #ifdef PCI_DRIVER
1222         pci_unregister_driver(&PCI_DRIVER);
1223 #endif
1224 #ifdef SA1111_DRIVER
1225         sa1111_driver_unregister(&SA1111_DRIVER);
1226 #endif
1227 #ifdef OF_PLATFORM_DRIVER
1228         of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1229 #endif
1230 #ifdef PLATFORM_DRIVER
1231         platform_driver_unregister(&PLATFORM_DRIVER);
1232 #endif
1233 #ifdef PS3_SYSTEM_BUS_DRIVER
1234         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1235 #endif
1236 #ifdef DEBUG
1237         debugfs_remove(ohci_debug_root);
1238 #endif
1239         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1240 }
1241 module_exit(ohci_hcd_mod_exit);
1242