drivers/usb/host/ohci-hcd.c

   1 /*
   2  * Open Host Controller Interface (OHCI) driver for USB.
   3  *
   4  * Maintainer: Alan Stern <stern@rowland.harvard.edu>
   5  *
   6  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   7  * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
   8  *
   9  * [ Initialisation is based on Linus'  ]
  10  * [ uhci code and gregs ohci fragments ]
  11  * [ (C) Copyright 1999 Linus Torvalds  ]
  12  * [ (C) Copyright 1999 Gregory P. Smith]
  13  *
  14  *
  15  * OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller
  16  * interfaces (though some non-x86 Intel chips use it).  It supports
  17  * smarter hardware than UHCI.  A download link for the spec available
  18  * through the http://www.usb.org website.
  19  *
  20  * This file is licenced under the GPL.
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <linux/pci.h>
  26 #include <linux/kernel.h>
  27 #include <linux/delay.h>
  28 #include <linux/ioport.h>
  29 #include <linux/sched.h>
  30 #include <linux/slab.h>
  31 #include <linux/errno.h>
  32 #include <linux/init.h>
  33 #include <linux/timer.h>
  34 #include <linux/list.h>
  35 #include <linux/usb.h>
  36 #include <linux/usb/otg.h>
  37 #include <linux/usb/hcd.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/dmapool.h>
  40 #include <linux/workqueue.h>
  41 #include <linux/debugfs.h>
  42
  43 #include <asm/io.h>
  44 #include <asm/irq.h>
  45 #include <asm/unaligned.h>
  46 #include <asm/byteorder.h>
  47
  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 #include "pci-quirks.h"
  80
  81 static void ohci_dump (struct ohci_hcd *ohci, int verbose);
  82 static int ohci_init (struct ohci_hcd *ohci);
  83 static void ohci_stop (struct usb_hcd *hcd);
  84
  85 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
  86 static int ohci_restart (struct ohci_hcd *ohci);
  87 #endif
  88
  89 #ifdef CONFIG_PCI
  90 static void sb800_prefetch(struct ohci_hcd *ohci, int on);
  91 #else
  92 static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
  93 {
  94         return;
  95 }
  96 #endif
  97
  98
  99 #include "ohci-hub.c"
 100 #include "ohci-dbg.c"
 101 #include "ohci-mem.c"
 102 #include "ohci-q.c"
 103
 104
 105 /*
 106  * On architectures with edge-triggered interrupts we must never return
 107  * IRQ_NONE.
 108  */
 109 #if defined(CONFIG_SA1111)  /* ... or other edge-triggered systems */
 110 #define IRQ_NOTMINE     IRQ_HANDLED
 111 #else
 112 #define IRQ_NOTMINE     IRQ_NONE
 113 #endif
 114
 115
 116 /* Some boards misreport power switching/overcurrent */
 117 static bool distrust_firmware = 1;
 118 module_param (distrust_firmware, bool, 0);
 119 MODULE_PARM_DESC (distrust_firmware,
 120         "true to distrust firmware power/overcurrent setup");
 121
 122 /* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */
 123 static bool no_handshake = 0;
 124 module_param (no_handshake, bool, 0);
 125 MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
 126
 127 /*-------------------------------------------------------------------------*/
 128
 129 /*
 130  * queue up an urb for anything except the root hub
 131  */
 132 static int ohci_urb_enqueue (
 133         struct usb_hcd  *hcd,
 134         struct urb      *urb,
 135         gfp_t           mem_flags
 136 ) {
 137         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 138         struct ed       *ed;
 139         urb_priv_t      *urb_priv;
 140         unsigned int    pipe = urb->pipe;
 141         int             i, size = 0;
 142         unsigned long   flags;
 143         int             retval = 0;
 144
 145 #ifdef OHCI_VERBOSE_DEBUG
 146         urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
 147 #endif
 148
 149         /* every endpoint has a ed, locate and maybe (re)initialize it */
 150         if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
 151                 return -ENOMEM;
 152
 153         /* for the private part of the URB we need the number of TDs (size) */
 154         switch (ed->type) {
 155                 case PIPE_CONTROL:
 156                         /* td_submit_urb() doesn't yet handle these */
 157                         if (urb->transfer_buffer_length > 4096)
 158                                 return -EMSGSIZE;
 159
 160                         /* 1 TD for setup, 1 for ACK, plus ... */
 161                         size = 2;
 162                         /* FALLTHROUGH */
 163                 // case PIPE_INTERRUPT:
 164                 // case PIPE_BULK:
 165                 default:
 166                         /* one TD for every 4096 Bytes (can be up to 8K) */
 167                         size += urb->transfer_buffer_length / 4096;
 168                         /* ... and for any remaining bytes ... */
 169                         if ((urb->transfer_buffer_length % 4096) != 0)
 170                                 size++;
 171                         /* ... and maybe a zero length packet to wrap it up */
 172                         if (size == 0)
 173                                 size++;
 174                         else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
 175                                 && (urb->transfer_buffer_length
 176                                         % usb_maxpacket (urb->dev, pipe,
 177                                                 usb_pipeout (pipe))) == 0)
 178                                 size++;
 179                         break;
 180                 case PIPE_ISOCHRONOUS: /* number of packets from URB */
 181                         size = urb->number_of_packets;
 182                         break;
 183         }
 184
 185         /* allocate the private part of the URB */
 186         urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
 187                         mem_flags);
 188         if (!urb_priv)
 189                 return -ENOMEM;
 190         INIT_LIST_HEAD (&urb_priv->pending);
 191         urb_priv->length = size;
 192         urb_priv->ed = ed;
 193
 194         /* allocate the TDs (deferring hash chain updates) */
 195         for (i = 0; i < size; i++) {
 196                 urb_priv->td [i] = td_alloc (ohci, mem_flags);
 197                 if (!urb_priv->td [i]) {
 198                         urb_priv->length = i;
 199                         urb_free_priv (ohci, urb_priv);
 200                         return -ENOMEM;
 201                 }
 202         }
 203
 204         spin_lock_irqsave (&ohci->lock, flags);
 205
 206         /* don't submit to a dead HC */
 207         if (!HCD_HW_ACCESSIBLE(hcd)) {
 208                 retval = -ENODEV;
 209                 goto fail;
 210         }
 211         if (ohci->rh_state != OHCI_RH_RUNNING) {
 212                 retval = -ENODEV;
 213                 goto fail;
 214         }
 215         retval = usb_hcd_link_urb_to_ep(hcd, urb);
 216         if (retval)
 217                 goto fail;
 218
 219         /* schedule the ed if needed */
 220         if (ed->state == ED_IDLE) {
 221                 retval = ed_schedule (ohci, ed);
 222                 if (retval < 0) {
 223                         usb_hcd_unlink_urb_from_ep(hcd, urb);
 224                         goto fail;
 225                 }
 226                 if (ed->type == PIPE_ISOCHRONOUS) {
 227                         u16     frame = ohci_frame_no(ohci);
 228
 229                         /* delay a few frames before the first TD */
 230                         frame += max_t (u16, 8, ed->interval);
 231                         frame &= ~(ed->interval - 1);
 232                         frame |= ed->branch;
 233                         urb->start_frame = frame;
 234
 235                         /* yes, only URB_ISO_ASAP is supported, and
 236                          * urb->start_frame is never used as input.
 237                          */
 238                 }
 239         } else if (ed->type == PIPE_ISOCHRONOUS)
 240                 urb->start_frame = ed->last_iso + ed->interval;
 241
 242         /* fill the TDs and link them to the ed; and
 243          * enable that part of the schedule, if needed
 244          * and update count of queued periodic urbs
 245          */
 246         urb->hcpriv = urb_priv;
 247         td_submit_urb (ohci, urb);
 248
 249 fail:
 250         if (retval)
 251                 urb_free_priv (ohci, urb_priv);
 252         spin_unlock_irqrestore (&ohci->lock, flags);
 253         return retval;
 254 }
 255
 256 /*
 257  * decouple the URB from the HC queues (TDs, urb_priv).
 258  * reporting is always done
 259  * asynchronously, and we might be dealing with an urb that's
 260  * partially transferred, or an ED with other urbs being unlinked.
 261  */
 262 static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 263 {
 264         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 265         unsigned long           flags;
 266         int                     rc;
 267
 268 #ifdef OHCI_VERBOSE_DEBUG
 269         urb_print(urb, "UNLINK", 1, status);
 270 #endif
 271
 272         spin_lock_irqsave (&ohci->lock, flags);
 273         rc = usb_hcd_check_unlink_urb(hcd, urb, status);
 274         if (rc) {
 275                 ;       /* Do nothing */
 276         } else if (ohci->rh_state == OHCI_RH_RUNNING) {
 277                 urb_priv_t  *urb_priv;
 278
 279                 /* Unless an IRQ completed the unlink while it was being
 280                  * handed to us, flag it for unlink and giveback, and force
 281                  * some upcoming INTR_SF to call finish_unlinks()
 282                  */
 283                 urb_priv = urb->hcpriv;
 284                 if (urb_priv) {
 285                         if (urb_priv->ed->state == ED_OPER)
 286                                 start_ed_unlink (ohci, urb_priv->ed);
 287                 }
 288         } else {
 289                 /*
 290                  * with HC dead, we won't respect hc queue pointers
 291                  * any more ... just clean up every urb's memory.
 292                  */
 293                 if (urb->hcpriv)
 294                         finish_urb(ohci, urb, status);
 295         }
 296         spin_unlock_irqrestore (&ohci->lock, flags);
 297         return rc;
 298 }
 299
 300 /*-------------------------------------------------------------------------*/
 301
 302 /* frees config/altsetting state for endpoints,
 303  * including ED memory, dummy TD, and bulk/intr data toggle
 304  */
 305
 306 static void
 307 ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
 308 {
 309         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 310         unsigned long           flags;
 311         struct ed               *ed = ep->hcpriv;
 312         unsigned                limit = 1000;
 313
 314         /* ASSERT:  any requests/urbs are being unlinked */
 315         /* ASSERT:  nobody can be submitting urbs for this any more */
 316
 317         if (!ed)
 318                 return;
 319
 320 rescan:
 321         spin_lock_irqsave (&ohci->lock, flags);
 322
 323         if (ohci->rh_state != OHCI_RH_RUNNING) {
 324 sanitize:
 325                 ed->state = ED_IDLE;
 326                 if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
 327                         ohci->eds_scheduled--;
 328                 finish_unlinks (ohci, 0);
 329         }
 330
 331         switch (ed->state) {
 332         case ED_UNLINK:         /* wait for hw to finish? */
 333                 /* major IRQ delivery trouble loses INTR_SF too... */
 334                 if (limit-- == 0) {
 335                         ohci_warn(ohci, "ED unlink timeout\n");
 336                         if (quirk_zfmicro(ohci)) {
 337                                 ohci_warn(ohci, "Attempting ZF TD recovery\n");
 338                                 ohci->ed_to_check = ed;
 339                                 ohci->zf_delay = 2;
 340                         }
 341                         goto sanitize;
 342                 }
 343                 spin_unlock_irqrestore (&ohci->lock, flags);
 344                 schedule_timeout_uninterruptible(1);
 345                 goto rescan;
 346         case ED_IDLE:           /* fully unlinked */
 347                 if (list_empty (&ed->td_list)) {
 348                         td_free (ohci, ed->dummy);
 349                         ed_free (ohci, ed);
 350                         break;
 351                 }
 352                 /* else FALL THROUGH */
 353         default:
 354                 /* caller was supposed to have unlinked any requests;
 355                  * that's not our job.  can't recover; must leak ed.
 356                  */
 357                 ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
 358                         ed, ep->desc.bEndpointAddress, ed->state,
 359                         list_empty (&ed->td_list) ? "" : " (has tds)");
 360                 td_free (ohci, ed->dummy);
 361                 break;
 362         }
 363         ep->hcpriv = NULL;
 364         spin_unlock_irqrestore (&ohci->lock, flags);
 365 }
 366
 367 static int ohci_get_frame (struct usb_hcd *hcd)
 368 {
 369         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 370
 371         return ohci_frame_no(ohci);
 372 }
 373
 374 static void ohci_usb_reset (struct ohci_hcd *ohci)
 375 {
 376         ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
 377         ohci->hc_control &= OHCI_CTRL_RWC;
 378         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 379         ohci->rh_state = OHCI_RH_HALTED;
 380 }
 381
 382 /* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
 383  * other cases where the next software may expect clean state from the
 384  * "firmware".  this is bus-neutral, unlike shutdown() methods.
 385  */
 386 static void
 387 ohci_shutdown (struct usb_hcd *hcd)
 388 {
 389         struct ohci_hcd *ohci;
 390
 391         ohci = hcd_to_ohci (hcd);
 392         ohci_writel(ohci, (u32) ~0, &ohci->regs->intrdisable);
 393
 394         /* Software reset, after which the controller goes into SUSPEND */
 395         ohci_writel(ohci, OHCI_HCR, &ohci->regs->cmdstatus);
 396         ohci_readl(ohci, &ohci->regs->cmdstatus);       /* flush the writes */
 397         udelay(10);
 398
 399         ohci_writel(ohci, ohci->fminterval, &ohci->regs->fminterval);
 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         ohci->rh_state = OHCI_RH_HALTED;
 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, val;
 575         int                     first = ohci->fminterval == 0;
 576         struct usb_hcd          *hcd = ohci_to_hcd(ohci);
 577
 578         ohci->rh_state = OHCI_RH_HALTED;
 579
 580         /* boot firmware should have set this up (5.1.1.3.1) */
 581         if (first) {
 582
 583                 val = ohci_readl (ohci, &ohci->regs->fminterval);
 584                 ohci->fminterval = val & 0x3fff;
 585                 if (ohci->fminterval != FI)
 586                         ohci_dbg (ohci, "fminterval delta %d\n",
 587                                 ohci->fminterval - FI);
 588                 ohci->fminterval |= FSMP (ohci->fminterval) << 16;
 589                 /* also: power/overcurrent flags in roothub.a */
 590         }
 591
 592         /* Reset USB nearly "by the book".  RemoteWakeupConnected has
 593          * to be checked in case boot firmware (BIOS/SMM/...) has set up
 594          * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM).
 595          * If the bus glue detected wakeup capability then it should
 596          * already be enabled; if so we'll just enable it again.
 597          */
 598         if ((ohci->hc_control & OHCI_CTRL_RWC) != 0)
 599                 device_set_wakeup_capable(hcd->self.controller, 1);
 600
 601         switch (ohci->hc_control & OHCI_CTRL_HCFS) {
 602         case OHCI_USB_OPER:
 603                 val = 0;
 604                 break;
 605         case OHCI_USB_SUSPEND:
 606         case OHCI_USB_RESUME:
 607                 ohci->hc_control &= OHCI_CTRL_RWC;
 608                 ohci->hc_control |= OHCI_USB_RESUME;
 609                 val = 10 /* msec wait */;
 610                 break;
 611         // case OHCI_USB_RESET:
 612         default:
 613                 ohci->hc_control &= OHCI_CTRL_RWC;
 614                 ohci->hc_control |= OHCI_USB_RESET;
 615                 val = 50 /* msec wait */;
 616                 break;
 617         }
 618         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 619         // flush the writes
 620         (void) ohci_readl (ohci, &ohci->regs->control);
 621         msleep(val);
 622
 623         memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
 624
 625         /* 2msec timelimit here means no irqs/preempt */
 626         spin_lock_irq (&ohci->lock);
 627
 628 retry:
 629         /* HC Reset requires max 10 us delay */
 630         ohci_writel (ohci, OHCI_HCR,  &ohci->regs->cmdstatus);
 631         val = 30;       /* ... allow extra time */
 632         while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
 633                 if (--val == 0) {
 634                         spin_unlock_irq (&ohci->lock);
 635                         ohci_err (ohci, "USB HC reset timed out!\n");
 636                         return -1;
 637                 }
 638                 udelay (1);
 639         }
 640
 641         /* now we're in the SUSPEND state ... must go OPERATIONAL
 642          * within 2msec else HC enters RESUME
 643          *
 644          * ... but some hardware won't init fmInterval "by the book"
 645          * (SiS, OPTi ...), so reset again instead.  SiS doesn't need
 646          * this if we write fmInterval after we're OPERATIONAL.
 647          * Unclear about ALi, ServerWorks, and others ... this could
 648          * easily be a longstanding bug in chip init on Linux.
 649          */
 650         if (ohci->flags & OHCI_QUIRK_INITRESET) {
 651                 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 652                 // flush those writes
 653                 (void) ohci_readl (ohci, &ohci->regs->control);
 654         }
 655
 656         /* Tell the controller where the control and bulk lists are
 657          * The lists are empty now. */
 658         ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
 659         ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
 660
 661         /* a reset clears this */
 662         ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
 663
 664         periodic_reinit (ohci);
 665
 666         /* some OHCI implementations are finicky about how they init.
 667          * bogus values here mean not even enumeration could work.
 668          */
 669         if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
 670                         || !ohci_readl (ohci, &ohci->regs->periodicstart)) {
 671                 if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
 672                         ohci->flags |= OHCI_QUIRK_INITRESET;
 673                         ohci_dbg (ohci, "enabling initreset quirk\n");
 674                         goto retry;
 675                 }
 676                 spin_unlock_irq (&ohci->lock);
 677                 ohci_err (ohci, "init err (%08x %04x)\n",
 678                         ohci_readl (ohci, &ohci->regs->fminterval),
 679                         ohci_readl (ohci, &ohci->regs->periodicstart));
 680                 return -EOVERFLOW;
 681         }
 682
 683         /* use rhsc irqs after khubd is fully initialized */
 684         set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 685         hcd->uses_new_polling = 1;
 686
 687         /* start controller operations */
 688         ohci->hc_control &= OHCI_CTRL_RWC;
 689         ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
 690         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 691         ohci->rh_state = OHCI_RH_RUNNING;
 692
 693         /* wake on ConnectStatusChange, matching external hubs */
 694         ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
 695
 696         /* Choose the interrupts we care about now, others later on demand */
 697         mask = OHCI_INTR_INIT;
 698         ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
 699         ohci_writel (ohci, mask, &ohci->regs->intrenable);
 700
 701         /* handle root hub init quirks ... */
 702         val = roothub_a (ohci);
 703         val &= ~(RH_A_PSM | RH_A_OCPM);
 704         if (ohci->flags & OHCI_QUIRK_SUPERIO) {
 705                 /* NSC 87560 and maybe others */
 706                 val |= RH_A_NOCP;
 707                 val &= ~(RH_A_POTPGT | RH_A_NPS);
 708                 ohci_writel (ohci, val, &ohci->regs->roothub.a);
 709         } else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
 710                         (ohci->flags & OHCI_QUIRK_HUB_POWER)) {
 711                 /* hub power always on; required for AMD-756 and some
 712                  * Mac platforms.  ganged overcurrent reporting, if any.
 713                  */
 714                 val |= RH_A_NPS;
 715                 ohci_writel (ohci, val, &ohci->regs->roothub.a);
 716         }
 717         ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
 718         ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
 719                                                 &ohci->regs->roothub.b);
 720         // flush those writes
 721         (void) ohci_readl (ohci, &ohci->regs->control);
 722
 723         ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 724         spin_unlock_irq (&ohci->lock);
 725
 726         // POTPGT delay is bits 24-31, in 2 ms units.
 727         mdelay ((val >> 23) & 0x1fe);
 728
 729         if (quirk_zfmicro(ohci)) {
 730                 /* Create timer to watch for bad queue state on ZF Micro */
 731                 setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
 732                                 (unsigned long) ohci);
 733
 734                 ohci->eds_scheduled = 0;
 735                 ohci->ed_to_check = NULL;
 736         }
 737
 738         ohci_dump (ohci, 1);
 739
 740         return 0;
 741 }
 742
 743 /*-------------------------------------------------------------------------*/
 744
 745 /* an interrupt happens */
 746
 747 static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 748 {
 749         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 750         struct ohci_regs __iomem *regs = ohci->regs;
 751         int                     ints;
 752
 753         /* Read interrupt status (and flush pending writes).  We ignore the
 754          * optimization of checking the LSB of hcca->done_head; it doesn't
 755          * work on all systems (edge triggering for OHCI can be a factor).
 756          */
 757         ints = ohci_readl(ohci, &regs->intrstatus);
 758
 759         /* Check for an all 1's result which is a typical consequence
 760          * of dead, unclocked, or unplugged (CardBus...) devices
 761          */
 762         if (ints == ~(u32)0) {
 763                 ohci->rh_state = OHCI_RH_HALTED;
 764                 ohci_dbg (ohci, "device removed!\n");
 765                 usb_hc_died(hcd);
 766                 return IRQ_HANDLED;
 767         }
 768
 769         /* We only care about interrupts that are enabled */
 770         ints &= ohci_readl(ohci, &regs->intrenable);
 771
 772         /* interrupt for some other device? */
 773         if (ints == 0 || unlikely(ohci->rh_state == OHCI_RH_HALTED))
 774                 return IRQ_NOTMINE;
 775
 776         if (ints & OHCI_INTR_UE) {
 777                 // e.g. due to PCI Master/Target Abort
 778                 if (quirk_nec(ohci)) {
 779                         /* Workaround for a silicon bug in some NEC chips used
 780                          * in Apple's PowerBooks. Adapted from Darwin code.
 781                          */
 782                         ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
 783
 784                         ohci_writel (ohci, OHCI_INTR_UE, &regs->intrdisable);
 785
 786                         schedule_work (&ohci->nec_work);
 787                 } else {
 788                         ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
 789                         ohci->rh_state = OHCI_RH_HALTED;
 790                         usb_hc_died(hcd);
 791                 }
 792
 793                 ohci_dump (ohci, 1);
 794                 ohci_usb_reset (ohci);
 795         }
 796
 797         if (ints & OHCI_INTR_RHSC) {
 798                 ohci_vdbg(ohci, "rhsc\n");
 799                 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 800                 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
 801                                 &regs->intrstatus);
 802
 803                 /* NOTE: Vendors didn't always make the same implementation
 804                  * choices for RHSC.  Many followed the spec; RHSC triggers
 805                  * on an edge, like setting and maybe clearing a port status
 806                  * change bit.  With others it's level-triggered, active
 807                  * until khubd clears all the port status change bits.  We'll
 808                  * always disable it here and rely on polling until khubd
 809                  * re-enables it.
 810                  */
 811                 ohci_writel(ohci, OHCI_INTR_RHSC, &regs->intrdisable);
 812                 usb_hcd_poll_rh_status(hcd);
 813         }
 814
 815         /* For connect and disconnect events, we expect the controller
 816          * to turn on RHSC along with RD.  But for remote wakeup events
 817          * this might not happen.
 818          */
 819         else if (ints & OHCI_INTR_RD) {
 820                 ohci_vdbg(ohci, "resume detect\n");
 821                 ohci_writel(ohci, OHCI_INTR_RD, &regs->intrstatus);
 822                 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 823                 if (ohci->autostop) {
 824                         spin_lock (&ohci->lock);
 825                         ohci_rh_resume (ohci);
 826                         spin_unlock (&ohci->lock);
 827                 } else
 828                         usb_hcd_resume_root_hub(hcd);
 829         }
 830
 831         if (ints & OHCI_INTR_WDH) {
 832                 spin_lock (&ohci->lock);
 833                 dl_done_list (ohci);
 834                 spin_unlock (&ohci->lock);
 835         }
 836
 837         if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
 838                 spin_lock(&ohci->lock);
 839                 if (ohci->ed_to_check) {
 840                         struct ed *ed = ohci->ed_to_check;
 841
 842                         if (check_ed(ohci, ed)) {
 843                                 /* HC thinks the TD list is empty; HCD knows
 844                                  * at least one TD is outstanding
 845                                  */
 846                                 if (--ohci->zf_delay == 0) {
 847                                         struct td *td = list_entry(
 848                                                 ed->td_list.next,
 849                                                 struct td, td_list);
 850                                         ohci_warn(ohci,
 851                                                   "Reclaiming orphan TD %p\n",
 852                                                   td);
 853                                         takeback_td(ohci, td);
 854                                         ohci->ed_to_check = NULL;
 855                                 }
 856                         } else
 857                                 ohci->ed_to_check = NULL;
 858                 }
 859                 spin_unlock(&ohci->lock);
 860         }
 861
 862         /* could track INTR_SO to reduce available PCI/... bandwidth */
 863
 864         /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
 865          * when there's still unlinking to be done (next frame).
 866          */
 867         spin_lock (&ohci->lock);
 868         if (ohci->ed_rm_list)
 869                 finish_unlinks (ohci, ohci_frame_no(ohci));
 870         if ((ints & OHCI_INTR_SF) != 0
 871                         && !ohci->ed_rm_list
 872                         && !ohci->ed_to_check
 873                         && ohci->rh_state == OHCI_RH_RUNNING)
 874                 ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
 875         spin_unlock (&ohci->lock);
 876
 877         if (ohci->rh_state == OHCI_RH_RUNNING) {
 878                 ohci_writel (ohci, ints, &regs->intrstatus);
 879                 ohci_writel (ohci, OHCI_INTR_MIE, &regs->intrenable);
 880                 // flush those writes
 881                 (void) ohci_readl (ohci, &ohci->regs->control);
 882         }
 883
 884         return IRQ_HANDLED;
 885 }
 886
 887 /*-------------------------------------------------------------------------*/
 888
 889 static void ohci_stop (struct usb_hcd *hcd)
 890 {
 891         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 892
 893         ohci_dump (ohci, 1);
 894
 895         if (quirk_nec(ohci))
 896                 flush_work_sync(&ohci->nec_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 = 0;
 902
 903         if (quirk_zfmicro(ohci))
 904                 del_timer(&ohci->unlink_watchdog);
 905         if (quirk_amdiso(ohci))
 906                 usb_amd_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         ohci->rh_state = OHCI_RH_HALTED;
 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 #if defined(CONFIG_ARCH_S3C24XX) || defined(CONFIG_ARCH_S3C64XX)
1003 #include "ohci-s3c2410.c"
1004 #define PLATFORM_DRIVER         ohci_hcd_s3c2410_driver
1005 #endif
1006
1007 #ifdef CONFIG_USB_OHCI_EXYNOS
1008 #include "ohci-exynos.c"
1009 #define PLATFORM_DRIVER         exynos_ohci_driver
1010 #endif
1011
1012 #ifdef CONFIG_USB_OHCI_HCD_OMAP1
1013 #include "ohci-omap.c"
1014 #define OMAP1_PLATFORM_DRIVER   ohci_hcd_omap_driver
1015 #endif
1016
1017 #ifdef CONFIG_USB_OHCI_HCD_OMAP3
1018 #include "ohci-omap3.c"
1019 #define OMAP3_PLATFORM_DRIVER   ohci_hcd_omap3_driver
1020 #endif
1021
1022 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
1023 #include "ohci-pxa27x.c"
1024 #define PLATFORM_DRIVER         ohci_hcd_pxa27x_driver
1025 #endif
1026
1027 #ifdef CONFIG_ARCH_EP93XX
1028 #include "ohci-ep93xx.c"
1029 #define PLATFORM_DRIVER         ohci_hcd_ep93xx_driver
1030 #endif
1031
1032 #ifdef CONFIG_MIPS_ALCHEMY
1033 #include "ohci-au1xxx.c"
1034 #define PLATFORM_DRIVER         ohci_hcd_au1xxx_driver
1035 #endif
1036
1037 #ifdef CONFIG_PNX8550
1038 #include "ohci-pnx8550.c"
1039 #define PLATFORM_DRIVER         ohci_hcd_pnx8550_driver
1040 #endif
1041
1042 #ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
1043 #include "ohci-ppc-soc.c"
1044 #define PLATFORM_DRIVER         ohci_hcd_ppc_soc_driver
1045 #endif
1046
1047 #ifdef CONFIG_ARCH_AT91
1048 #include "ohci-at91.c"
1049 #define PLATFORM_DRIVER         ohci_hcd_at91_driver
1050 #endif
1051
1052 #ifdef CONFIG_ARCH_LPC32XX
1053 #include "ohci-nxp.c"
1054 #define PLATFORM_DRIVER         usb_hcd_nxp_driver
1055 #endif
1056
1057 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
1058 #include "ohci-da8xx.c"
1059 #define PLATFORM_DRIVER         ohci_hcd_da8xx_driver
1060 #endif
1061
1062 #ifdef CONFIG_USB_OHCI_SH
1063 #include "ohci-sh.c"
1064 #define PLATFORM_DRIVER         ohci_hcd_sh_driver
1065 #endif
1066
1067
1068 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF
1069 #include "ohci-ppc-of.c"
1070 #define OF_PLATFORM_DRIVER      ohci_hcd_ppc_of_driver
1071 #endif
1072
1073 #ifdef CONFIG_PLAT_SPEAR
1074 #include "ohci-spear.c"
1075 #define PLATFORM_DRIVER         spear_ohci_hcd_driver
1076 #endif
1077
1078 #ifdef CONFIG_PPC_PS3
1079 #include "ohci-ps3.c"
1080 #define PS3_SYSTEM_BUS_DRIVER   ps3_ohci_driver
1081 #endif
1082
1083 #ifdef CONFIG_MFD_SM501
1084 #include "ohci-sm501.c"
1085 #define SM501_OHCI_DRIVER       ohci_hcd_sm501_driver
1086 #endif
1087
1088 #ifdef CONFIG_MFD_TC6393XB
1089 #include "ohci-tmio.c"
1090 #define TMIO_OHCI_DRIVER        ohci_hcd_tmio_driver
1091 #endif
1092
1093 #ifdef CONFIG_MACH_JZ4740
1094 #include "ohci-jz4740.c"
1095 #define PLATFORM_DRIVER ohci_hcd_jz4740_driver
1096 #endif
1097
1098 #ifdef CONFIG_USB_OCTEON_OHCI
1099 #include "ohci-octeon.c"
1100 #define PLATFORM_DRIVER         ohci_octeon_driver
1101 #endif
1102
1103 #ifdef CONFIG_TILE_USB
1104 #include "ohci-tilegx.c"
1105 #define PLATFORM_DRIVER         ohci_hcd_tilegx_driver
1106 #endif
1107
1108 #ifdef CONFIG_USB_CNS3XXX_OHCI
1109 #include "ohci-cns3xxx.c"
1110 #define PLATFORM_DRIVER         ohci_hcd_cns3xxx_driver
1111 #endif
1112
1113 #ifdef CONFIG_CPU_XLR
1114 #include "ohci-xls.c"
1115 #define PLATFORM_DRIVER         ohci_xls_driver
1116 #endif
1117
1118 #ifdef CONFIG_USB_OHCI_HCD_PLATFORM
1119 #include "ohci-platform.c"
1120 #define PLATFORM_DRIVER         ohci_platform_driver
1121 #endif
1122
1123 #if     !defined(PCI_DRIVER) &&         \
1124         !defined(PLATFORM_DRIVER) &&    \
1125         !defined(OMAP1_PLATFORM_DRIVER) &&      \
1126         !defined(OMAP3_PLATFORM_DRIVER) &&      \
1127         !defined(OF_PLATFORM_DRIVER) && \
1128         !defined(SA1111_DRIVER) &&      \
1129         !defined(PS3_SYSTEM_BUS_DRIVER) && \
1130         !defined(SM501_OHCI_DRIVER) && \
1131         !defined(TMIO_OHCI_DRIVER)
1132 #error "missing bus glue for ohci-hcd"
1133 #endif
1134
1135 static int __init ohci_hcd_mod_init(void)
1136 {
1137         int retval = 0;
1138
1139         if (usb_disabled())
1140                 return -ENODEV;
1141
1142         printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1143         pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
1144                 sizeof (struct ed), sizeof (struct td));
1145         set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1146
1147 #ifdef DEBUG
1148         ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root);
1149         if (!ohci_debug_root) {
1150                 retval = -ENOENT;
1151                 goto error_debug;
1152         }
1153 #endif
1154
1155 #ifdef PS3_SYSTEM_BUS_DRIVER
1156         retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1157         if (retval < 0)
1158                 goto error_ps3;
1159 #endif
1160
1161 #ifdef PLATFORM_DRIVER
1162         retval = platform_driver_register(&PLATFORM_DRIVER);
1163         if (retval < 0)
1164                 goto error_platform;
1165 #endif
1166
1167 #ifdef OMAP1_PLATFORM_DRIVER
1168         retval = platform_driver_register(&OMAP1_PLATFORM_DRIVER);
1169         if (retval < 0)
1170                 goto error_omap1_platform;
1171 #endif
1172
1173 #ifdef OMAP3_PLATFORM_DRIVER
1174         retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER);
1175         if (retval < 0)
1176                 goto error_omap3_platform;
1177 #endif
1178
1179 #ifdef OF_PLATFORM_DRIVER
1180         retval = platform_driver_register(&OF_PLATFORM_DRIVER);
1181         if (retval < 0)
1182                 goto error_of_platform;
1183 #endif
1184
1185 #ifdef SA1111_DRIVER
1186         retval = sa1111_driver_register(&SA1111_DRIVER);
1187         if (retval < 0)
1188                 goto error_sa1111;
1189 #endif
1190
1191 #ifdef PCI_DRIVER
1192         retval = pci_register_driver(&PCI_DRIVER);
1193         if (retval < 0)
1194                 goto error_pci;
1195 #endif
1196
1197 #ifdef SM501_OHCI_DRIVER
1198         retval = platform_driver_register(&SM501_OHCI_DRIVER);
1199         if (retval < 0)
1200                 goto error_sm501;
1201 #endif
1202
1203 #ifdef TMIO_OHCI_DRIVER
1204         retval = platform_driver_register(&TMIO_OHCI_DRIVER);
1205         if (retval < 0)
1206                 goto error_tmio;
1207 #endif
1208
1209         return retval;
1210
1211         /* Error path */
1212 #ifdef TMIO_OHCI_DRIVER
1213         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1214  error_tmio:
1215 #endif
1216 #ifdef SM501_OHCI_DRIVER
1217         platform_driver_unregister(&SM501_OHCI_DRIVER);
1218  error_sm501:
1219 #endif
1220 #ifdef PCI_DRIVER
1221         pci_unregister_driver(&PCI_DRIVER);
1222  error_pci:
1223 #endif
1224 #ifdef SA1111_DRIVER
1225         sa1111_driver_unregister(&SA1111_DRIVER);
1226  error_sa1111:
1227 #endif
1228 #ifdef OF_PLATFORM_DRIVER
1229         platform_driver_unregister(&OF_PLATFORM_DRIVER);
1230  error_of_platform:
1231 #endif
1232 #ifdef PLATFORM_DRIVER
1233         platform_driver_unregister(&PLATFORM_DRIVER);
1234  error_platform:
1235 #endif
1236 #ifdef OMAP1_PLATFORM_DRIVER
1237         platform_driver_unregister(&OMAP1_PLATFORM_DRIVER);
1238  error_omap1_platform:
1239 #endif
1240 #ifdef OMAP3_PLATFORM_DRIVER
1241         platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
1242  error_omap3_platform:
1243 #endif
1244 #ifdef PS3_SYSTEM_BUS_DRIVER
1245         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1246  error_ps3:
1247 #endif
1248 #ifdef DEBUG
1249         debugfs_remove(ohci_debug_root);
1250         ohci_debug_root = NULL;
1251  error_debug:
1252 #endif
1253
1254         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1255         return retval;
1256 }
1257 module_init(ohci_hcd_mod_init);
1258
1259 static void __exit ohci_hcd_mod_exit(void)
1260 {
1261 #ifdef TMIO_OHCI_DRIVER
1262         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1263 #endif
1264 #ifdef SM501_OHCI_DRIVER
1265         platform_driver_unregister(&SM501_OHCI_DRIVER);
1266 #endif
1267 #ifdef PCI_DRIVER
1268         pci_unregister_driver(&PCI_DRIVER);
1269 #endif
1270 #ifdef SA1111_DRIVER
1271         sa1111_driver_unregister(&SA1111_DRIVER);
1272 #endif
1273 #ifdef OF_PLATFORM_DRIVER
1274         platform_driver_unregister(&OF_PLATFORM_DRIVER);
1275 #endif
1276 #ifdef PLATFORM_DRIVER
1277         platform_driver_unregister(&PLATFORM_DRIVER);
1278 #endif
1279 #ifdef OMAP3_PLATFORM_DRIVER
1280         platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
1281 #endif
1282 #ifdef PS3_SYSTEM_BUS_DRIVER
1283         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1284 #endif
1285 #ifdef DEBUG
1286         debugfs_remove(ohci_debug_root);
1287 #endif
1288         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1289 }
1290 module_exit(ohci_hcd_mod_exit);
1291