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/usb/hcd.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/dmapool.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
  48 #define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
  49 #define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
  50
  51 /*-------------------------------------------------------------------------*/
  52
  53 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  54
  55 /* For initializing controller (mask in an HCFS mode too) */
  56 #define OHCI_CONTROL_INIT       OHCI_CTRL_CBSR
  57 #define OHCI_INTR_INIT \
  58                 (OHCI_INTR_MIE | OHCI_INTR_RHSC | OHCI_INTR_UE \
  59                 | OHCI_INTR_RD | OHCI_INTR_WDH)
  60
  61 #ifdef __hppa__
  62 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
  63 #define IR_DISABLE
  64 #endif
  65
  66 #ifdef CONFIG_ARCH_OMAP
  67 /* OMAP doesn't support IR (no SMM; not needed) */
  68 #define IR_DISABLE
  69 #endif
  70
  71 /*-------------------------------------------------------------------------*/
  72
  73 static const char       hcd_name [] = "ohci_hcd";
  74
  75 #define STATECHANGE_DELAY       msecs_to_jiffies(300)
  76
  77 #include "ohci.h"
  78
  79 static void ohci_dump (struct ohci_hcd *ohci, int verbose);
  80 static int ohci_init (struct ohci_hcd *ohci);
  81 static void ohci_stop (struct usb_hcd *hcd);
  82
  83 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
  84 static int ohci_restart (struct ohci_hcd *ohci);
  85 #endif
  86
  87 #ifdef CONFIG_PCI
  88 static void quirk_amd_pll(int state);
  89 static void amd_iso_dev_put(void);
  90 static void sb800_prefetch(struct ohci_hcd *ohci, int on);
  91 #else
  92 static inline void quirk_amd_pll(int state)
  93 {
  94         return;
  95 }
  96 static inline void amd_iso_dev_put(void)
  97 {
  98         return;
  99 }
 100 static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
 101 {
 102         return;
 103 }
 104 #endif
 105
 106
 107 #include "ohci-hub.c"
 108 #include "ohci-dbg.c"
 109 #include "ohci-mem.c"
 110 #include "ohci-q.c"
 111
 112
 113 /*
 114  * On architectures with edge-triggered interrupts we must never return
 115  * IRQ_NONE.
 116  */
 117 #if defined(CONFIG_SA1111)  /* ... or other edge-triggered systems */
 118 #define IRQ_NOTMINE     IRQ_HANDLED
 119 #else
 120 #define IRQ_NOTMINE     IRQ_NONE
 121 #endif
 122
 123
 124 /* Some boards misreport power switching/overcurrent */
 125 static int distrust_firmware = 1;
 126 module_param (distrust_firmware, bool, 0);
 127 MODULE_PARM_DESC (distrust_firmware,
 128         "true to distrust firmware power/overcurrent setup");
 129
 130 /* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */
 131 static int no_handshake = 0;
 132 module_param (no_handshake, bool, 0);
 133 MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
 134
 135 /*-------------------------------------------------------------------------*/
 136
 137 /*
 138  * queue up an urb for anything except the root hub
 139  */
 140 static int ohci_urb_enqueue (
 141         struct usb_hcd  *hcd,
 142         struct urb      *urb,
 143         gfp_t           mem_flags
 144 ) {
 145         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 146         struct ed       *ed;
 147         urb_priv_t      *urb_priv;
 148         unsigned int    pipe = urb->pipe;
 149         int             i, size = 0;
 150         unsigned long   flags;
 151         int             retval = 0;
 152
 153 #ifdef OHCI_VERBOSE_DEBUG
 154         urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
 155 #endif
 156
 157         /* every endpoint has a ed, locate and maybe (re)initialize it */
 158         if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
 159                 return -ENOMEM;
 160
 161         /* for the private part of the URB we need the number of TDs (size) */
 162         switch (ed->type) {
 163                 case PIPE_CONTROL:
 164                         /* td_submit_urb() doesn't yet handle these */
 165                         if (urb->transfer_buffer_length > 4096)
 166                                 return -EMSGSIZE;
 167
 168                         /* 1 TD for setup, 1 for ACK, plus ... */
 169                         size = 2;
 170                         /* FALLTHROUGH */
 171                 // case PIPE_INTERRUPT:
 172                 // case PIPE_BULK:
 173                 default:
 174                         /* one TD for every 4096 Bytes (can be upto 8K) */
 175                         size += urb->transfer_buffer_length / 4096;
 176                         /* ... and for any remaining bytes ... */
 177                         if ((urb->transfer_buffer_length % 4096) != 0)
 178                                 size++;
 179                         /* ... and maybe a zero length packet to wrap it up */
 180                         if (size == 0)
 181                                 size++;
 182                         else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
 183                                 && (urb->transfer_buffer_length
 184                                         % usb_maxpacket (urb->dev, pipe,
 185                                                 usb_pipeout (pipe))) == 0)
 186                                 size++;
 187                         break;
 188                 case PIPE_ISOCHRONOUS: /* number of packets from URB */
 189                         size = urb->number_of_packets;
 190                         break;
 191         }
 192
 193         /* allocate the private part of the URB */
 194         urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
 195                         mem_flags);
 196         if (!urb_priv)
 197                 return -ENOMEM;
 198         INIT_LIST_HEAD (&urb_priv->pending);
 199         urb_priv->length = size;
 200         urb_priv->ed = ed;
 201
 202         /* allocate the TDs (deferring hash chain updates) */
 203         for (i = 0; i < size; i++) {
 204                 urb_priv->td [i] = td_alloc (ohci, mem_flags);
 205                 if (!urb_priv->td [i]) {
 206                         urb_priv->length = i;
 207                         urb_free_priv (ohci, urb_priv);
 208                         return -ENOMEM;
 209                 }
 210         }
 211
 212         spin_lock_irqsave (&ohci->lock, flags);
 213
 214         /* don't submit to a dead HC */
 215         if (!HCD_HW_ACCESSIBLE(hcd)) {
 216                 retval = -ENODEV;
 217                 goto fail;
 218         }
 219         if (!HC_IS_RUNNING(hcd->state)) {
 220                 retval = -ENODEV;
 221                 goto fail;
 222         }
 223         retval = usb_hcd_link_urb_to_ep(hcd, urb);
 224         if (retval)
 225                 goto fail;
 226
 227         /* schedule the ed if needed */
 228         if (ed->state == ED_IDLE) {
 229                 retval = ed_schedule (ohci, ed);
 230                 if (retval < 0) {
 231                         usb_hcd_unlink_urb_from_ep(hcd, urb);
 232                         goto fail;
 233                 }
 234                 if (ed->type == PIPE_ISOCHRONOUS) {
 235                         u16     frame = ohci_frame_no(ohci);
 236
 237                         /* delay a few frames before the first TD */
 238                         frame += max_t (u16, 8, ed->interval);
 239                         frame &= ~(ed->interval - 1);
 240                         frame |= ed->branch;
 241                         urb->start_frame = frame;
 242
 243                         /* yes, only URB_ISO_ASAP is supported, and
 244                          * urb->start_frame is never used as input.
 245                          */
 246                 }
 247         } else if (ed->type == PIPE_ISOCHRONOUS)
 248                 urb->start_frame = ed->last_iso + ed->interval;
 249
 250         /* fill the TDs and link them to the ed; and
 251          * enable that part of the schedule, if needed
 252          * and update count of queued periodic urbs
 253          */
 254         urb->hcpriv = urb_priv;
 255         td_submit_urb (ohci, urb);
 256
 257 fail:
 258         if (retval)
 259                 urb_free_priv (ohci, urb_priv);
 260         spin_unlock_irqrestore (&ohci->lock, flags);
 261         return retval;
 262 }
 263
 264 /*
 265  * decouple the URB from the HC queues (TDs, urb_priv).
 266  * reporting is always done
 267  * asynchronously, and we might be dealing with an urb that's
 268  * partially transferred, or an ED with other urbs being unlinked.
 269  */
 270 static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 271 {
 272         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 273         unsigned long           flags;
 274         int                     rc;
 275
 276 #ifdef OHCI_VERBOSE_DEBUG
 277         urb_print(urb, "UNLINK", 1, status);
 278 #endif
 279
 280         spin_lock_irqsave (&ohci->lock, flags);
 281         rc = usb_hcd_check_unlink_urb(hcd, urb, status);
 282         if (rc) {
 283                 ;       /* Do nothing */
 284         } else if (HC_IS_RUNNING(hcd->state)) {
 285                 urb_priv_t  *urb_priv;
 286
 287                 /* Unless an IRQ completed the unlink while it was being
 288                  * handed to us, flag it for unlink and giveback, and force
 289                  * some upcoming INTR_SF to call finish_unlinks()
 290                  */
 291                 urb_priv = urb->hcpriv;
 292                 if (urb_priv) {
 293                         if (urb_priv->ed->state == ED_OPER)
 294                                 start_ed_unlink (ohci, urb_priv->ed);
 295                 }
 296         } else {
 297                 /*
 298                  * with HC dead, we won't respect hc queue pointers
 299                  * any more ... just clean up every urb's memory.
 300                  */
 301                 if (urb->hcpriv)
 302                         finish_urb(ohci, urb, status);
 303         }
 304         spin_unlock_irqrestore (&ohci->lock, flags);
 305         return rc;
 306 }
 307
 308 /*-------------------------------------------------------------------------*/
 309
 310 /* frees config/altsetting state for endpoints,
 311  * including ED memory, dummy TD, and bulk/intr data toggle
 312  */
 313
 314 static void
 315 ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
 316 {
 317         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 318         unsigned long           flags;
 319         struct ed               *ed = ep->hcpriv;
 320         unsigned                limit = 1000;
 321
 322         /* ASSERT:  any requests/urbs are being unlinked */
 323         /* ASSERT:  nobody can be submitting urbs for this any more */
 324
 325         if (!ed)
 326                 return;
 327
 328 rescan:
 329         spin_lock_irqsave (&ohci->lock, flags);
 330
 331         if (!HC_IS_RUNNING (hcd->state)) {
 332 sanitize:
 333                 ed->state = ED_IDLE;
 334                 if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
 335                         ohci->eds_scheduled--;
 336                 finish_unlinks (ohci, 0);
 337         }
 338
 339         switch (ed->state) {
 340         case ED_UNLINK:         /* wait for hw to finish? */
 341                 /* major IRQ delivery trouble loses INTR_SF too... */
 342                 if (limit-- == 0) {
 343                         ohci_warn(ohci, "ED unlink timeout\n");
 344                         if (quirk_zfmicro(ohci)) {
 345                                 ohci_warn(ohci, "Attempting ZF TD recovery\n");
 346                                 ohci->ed_to_check = ed;
 347                                 ohci->zf_delay = 2;
 348                         }
 349                         goto sanitize;
 350                 }
 351                 spin_unlock_irqrestore (&ohci->lock, flags);
 352                 schedule_timeout_uninterruptible(1);
 353                 goto rescan;
 354         case ED_IDLE:           /* fully unlinked */
 355                 if (list_empty (&ed->td_list)) {
 356                         td_free (ohci, ed->dummy);
 357                         ed_free (ohci, ed);
 358                         break;
 359                 }
 360                 /* else FALL THROUGH */
 361         default:
 362                 /* caller was supposed to have unlinked any requests;
 363                  * that's not our job.  can't recover; must leak ed.
 364                  */
 365                 ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
 366                         ed, ep->desc.bEndpointAddress, ed->state,
 367                         list_empty (&ed->td_list) ? "" : " (has tds)");
 368                 td_free (ohci, ed->dummy);
 369                 break;
 370         }
 371         ep->hcpriv = NULL;
 372         spin_unlock_irqrestore (&ohci->lock, flags);
 373 }
 374
 375 static int ohci_get_frame (struct usb_hcd *hcd)
 376 {
 377         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 378
 379         return ohci_frame_no(ohci);
 380 }
 381
 382 static void ohci_usb_reset (struct ohci_hcd *ohci)
 383 {
 384         ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
 385         ohci->hc_control &= OHCI_CTRL_RWC;
 386         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 387 }
 388
 389 /* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
 390  * other cases where the next software may expect clean state from the
 391  * "firmware".  this is bus-neutral, unlike shutdown() methods.
 392  */
 393 static void
 394 ohci_shutdown (struct usb_hcd *hcd)
 395 {
 396         struct ohci_hcd *ohci;
 397
 398         ohci = hcd_to_ohci (hcd);
 399         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 400         ohci->hc_control = ohci_readl(ohci, &ohci->regs->control);
 401
 402         /* If the SHUTDOWN quirk is set, don't put the controller in RESET */
 403         ohci->hc_control &= (ohci->flags & OHCI_QUIRK_SHUTDOWN ?
 404                         OHCI_CTRL_RWC | OHCI_CTRL_HCFS :
 405                         OHCI_CTRL_RWC);
 406         ohci_writel(ohci, ohci->hc_control, &ohci->regs->control);
 407
 408         /* flush the writes */
 409         (void) ohci_readl (ohci, &ohci->regs->control);
 410 }
 411
 412 static int check_ed(struct ohci_hcd *ohci, struct ed *ed)
 413 {
 414         return (hc32_to_cpu(ohci, ed->hwINFO) & ED_IN) != 0
 415                 && (hc32_to_cpu(ohci, ed->hwHeadP) & TD_MASK)
 416                         == (hc32_to_cpu(ohci, ed->hwTailP) & TD_MASK)
 417                 && !list_empty(&ed->td_list);
 418 }
 419
 420 /* ZF Micro watchdog timer callback. The ZF Micro chipset sometimes completes
 421  * an interrupt TD but neglects to add it to the donelist.  On systems with
 422  * this chipset, we need to periodically check the state of the queues to look
 423  * for such "lost" TDs.
 424  */
 425 static void unlink_watchdog_func(unsigned long _ohci)
 426 {
 427         unsigned long   flags;
 428         unsigned        max;
 429         unsigned        seen_count = 0;
 430         unsigned        i;
 431         struct ed       **seen = NULL;
 432         struct ohci_hcd *ohci = (struct ohci_hcd *) _ohci;
 433
 434         spin_lock_irqsave(&ohci->lock, flags);
 435         max = ohci->eds_scheduled;
 436         if (!max)
 437                 goto done;
 438
 439         if (ohci->ed_to_check)
 440                 goto out;
 441
 442         seen = kcalloc(max, sizeof *seen, GFP_ATOMIC);
 443         if (!seen)
 444                 goto out;
 445
 446         for (i = 0; i < NUM_INTS; i++) {
 447                 struct ed       *ed = ohci->periodic[i];
 448
 449                 while (ed) {
 450                         unsigned        temp;
 451
 452                         /* scan this branch of the periodic schedule tree */
 453                         for (temp = 0; temp < seen_count; temp++) {
 454                                 if (seen[temp] == ed) {
 455                                         /* we've checked it and what's after */
 456                                         ed = NULL;
 457                                         break;
 458                                 }
 459                         }
 460                         if (!ed)
 461                                 break;
 462                         seen[seen_count++] = ed;
 463                         if (!check_ed(ohci, ed)) {
 464                                 ed = ed->ed_next;
 465                                 continue;
 466                         }
 467
 468                         /* HC's TD list is empty, but HCD sees at least one
 469                          * TD that's not been sent through the donelist.
 470                          */
 471                         ohci->ed_to_check = ed;
 472                         ohci->zf_delay = 2;
 473
 474                         /* The HC may wait until the next frame to report the
 475                          * TD as done through the donelist and INTR_WDH.  (We
 476                          * just *assume* it's not a multi-TD interrupt URB;
 477                          * those could defer the IRQ more than one frame, using
 478                          * DI...)  Check again after the next INTR_SF.
 479                          */
 480                         ohci_writel(ohci, OHCI_INTR_SF,
 481                                         &ohci->regs->intrstatus);
 482                         ohci_writel(ohci, OHCI_INTR_SF,
 483                                         &ohci->regs->intrenable);
 484
 485                         /* flush those writes */
 486                         (void) ohci_readl(ohci, &ohci->regs->control);
 487
 488                         goto out;
 489                 }
 490         }
 491 out:
 492         kfree(seen);
 493         if (ohci->eds_scheduled)
 494                 mod_timer(&ohci->unlink_watchdog, round_jiffies(jiffies + HZ));
 495 done:
 496         spin_unlock_irqrestore(&ohci->lock, flags);
 497 }
 498
 499 /*-------------------------------------------------------------------------*
 500  * HC functions
 501  *-------------------------------------------------------------------------*/
 502
 503 /* init memory, and kick BIOS/SMM off */
 504
 505 static int ohci_init (struct ohci_hcd *ohci)
 506 {
 507         int ret;
 508         struct usb_hcd *hcd = ohci_to_hcd(ohci);
 509
 510         if (distrust_firmware)
 511                 ohci->flags |= OHCI_QUIRK_HUB_POWER;
 512
 513         disable (ohci);
 514         ohci->regs = hcd->regs;
 515
 516         /* REVISIT this BIOS handshake is now moved into PCI "quirks", and
 517          * was never needed for most non-PCI systems ... remove the code?
 518          */
 519
 520 #ifndef IR_DISABLE
 521         /* SMM owns the HC?  not for long! */
 522         if (!no_handshake && ohci_readl (ohci,
 523                                         &ohci->regs->control) & OHCI_CTRL_IR) {
 524                 u32 temp;
 525
 526                 ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n");
 527
 528                 /* this timeout is arbitrary.  we make it long, so systems
 529                  * depending on usb keyboards may be usable even if the
 530                  * BIOS/SMM code seems pretty broken.
 531                  */
 532                 temp = 500;     /* arbitrary: five seconds */
 533
 534                 ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable);
 535                 ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus);
 536                 while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) {
 537                         msleep (10);
 538                         if (--temp == 0) {
 539                                 ohci_err (ohci, "USB HC takeover failed!"
 540                                         "  (BIOS/SMM bug)\n");
 541                                 return -EBUSY;
 542                         }
 543                 }
 544                 ohci_usb_reset (ohci);
 545         }
 546 #endif
 547
 548         /* Disable HC interrupts */
 549         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 550
 551         /* flush the writes, and save key bits like RWC */
 552         if (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_RWC)
 553                 ohci->hc_control |= OHCI_CTRL_RWC;
 554
 555         /* Read the number of ports unless overridden */
 556         if (ohci->num_ports == 0)
 557                 ohci->num_ports = roothub_a(ohci) & RH_A_NDP;
 558
 559         if (ohci->hcca)
 560                 return 0;
 561
 562         ohci->hcca = dma_alloc_coherent (hcd->self.controller,
 563                         sizeof *ohci->hcca, &ohci->hcca_dma, 0);
 564         if (!ohci->hcca)
 565                 return -ENOMEM;
 566
 567         if ((ret = ohci_mem_init (ohci)) < 0)
 568                 ohci_stop (hcd);
 569         else {
 570                 create_debug_files (ohci);
 571         }
 572
 573         return ret;
 574 }
 575
 576 /*-------------------------------------------------------------------------*/
 577
 578 /* Start an OHCI controller, set the BUS operational
 579  * resets USB and controller
 580  * enable interrupts
 581  */
 582 static int ohci_run (struct ohci_hcd *ohci)
 583 {
 584         u32                     mask, val;
 585         int                     first = ohci->fminterval == 0;
 586         struct usb_hcd          *hcd = ohci_to_hcd(ohci);
 587
 588         disable (ohci);
 589
 590         /* boot firmware should have set this up (5.1.1.3.1) */
 591         if (first) {
 592
 593                 val = ohci_readl (ohci, &ohci->regs->fminterval);
 594                 ohci->fminterval = val & 0x3fff;
 595                 if (ohci->fminterval != FI)
 596                         ohci_dbg (ohci, "fminterval delta %d\n",
 597                                 ohci->fminterval - FI);
 598                 ohci->fminterval |= FSMP (ohci->fminterval) << 16;
 599                 /* also: power/overcurrent flags in roothub.a */
 600         }
 601
 602         /* Reset USB nearly "by the book".  RemoteWakeupConnected has
 603          * to be checked in case boot firmware (BIOS/SMM/...) has set up
 604          * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM).
 605          * If the bus glue detected wakeup capability then it should
 606          * already be enabled; if so we'll just enable it again.
 607          */
 608         if ((ohci->hc_control & OHCI_CTRL_RWC) != 0)
 609                 device_set_wakeup_capable(hcd->self.controller, 1);
 610
 611         switch (ohci->hc_control & OHCI_CTRL_HCFS) {
 612         case OHCI_USB_OPER:
 613                 val = 0;
 614                 break;
 615         case OHCI_USB_SUSPEND:
 616         case OHCI_USB_RESUME:
 617                 ohci->hc_control &= OHCI_CTRL_RWC;
 618                 ohci->hc_control |= OHCI_USB_RESUME;
 619                 val = 10 /* msec wait */;
 620                 break;
 621         // case OHCI_USB_RESET:
 622         default:
 623                 ohci->hc_control &= OHCI_CTRL_RWC;
 624                 ohci->hc_control |= OHCI_USB_RESET;
 625                 val = 50 /* msec wait */;
 626                 break;
 627         }
 628         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 629         // flush the writes
 630         (void) ohci_readl (ohci, &ohci->regs->control);
 631         msleep(val);
 632
 633         memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
 634
 635         /* 2msec timelimit here means no irqs/preempt */
 636         spin_lock_irq (&ohci->lock);
 637
 638 retry:
 639         /* HC Reset requires max 10 us delay */
 640         ohci_writel (ohci, OHCI_HCR,  &ohci->regs->cmdstatus);
 641         val = 30;       /* ... allow extra time */
 642         while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
 643                 if (--val == 0) {
 644                         spin_unlock_irq (&ohci->lock);
 645                         ohci_err (ohci, "USB HC reset timed out!\n");
 646                         return -1;
 647                 }
 648                 udelay (1);
 649         }
 650
 651         /* now we're in the SUSPEND state ... must go OPERATIONAL
 652          * within 2msec else HC enters RESUME
 653          *
 654          * ... but some hardware won't init fmInterval "by the book"
 655          * (SiS, OPTi ...), so reset again instead.  SiS doesn't need
 656          * this if we write fmInterval after we're OPERATIONAL.
 657          * Unclear about ALi, ServerWorks, and others ... this could
 658          * easily be a longstanding bug in chip init on Linux.
 659          */
 660         if (ohci->flags & OHCI_QUIRK_INITRESET) {
 661                 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 662                 // flush those writes
 663                 (void) ohci_readl (ohci, &ohci->regs->control);
 664         }
 665
 666         /* Tell the controller where the control and bulk lists are
 667          * The lists are empty now. */
 668         ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
 669         ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
 670
 671         /* a reset clears this */
 672         ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
 673
 674         periodic_reinit (ohci);
 675
 676         /* some OHCI implementations are finicky about how they init.
 677          * bogus values here mean not even enumeration could work.
 678          */
 679         if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
 680                         || !ohci_readl (ohci, &ohci->regs->periodicstart)) {
 681                 if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
 682                         ohci->flags |= OHCI_QUIRK_INITRESET;
 683                         ohci_dbg (ohci, "enabling initreset quirk\n");
 684                         goto retry;
 685                 }
 686                 spin_unlock_irq (&ohci->lock);
 687                 ohci_err (ohci, "init err (%08x %04x)\n",
 688                         ohci_readl (ohci, &ohci->regs->fminterval),
 689                         ohci_readl (ohci, &ohci->regs->periodicstart));
 690                 return -EOVERFLOW;
 691         }
 692
 693         /* use rhsc irqs after khubd is fully initialized */
 694         set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 695         hcd->uses_new_polling = 1;
 696
 697         /* start controller operations */
 698         ohci->hc_control &= OHCI_CTRL_RWC;
 699         ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
 700         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 701         hcd->state = HC_STATE_RUNNING;
 702
 703         /* wake on ConnectStatusChange, matching external hubs */
 704         ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
 705
 706         /* Choose the interrupts we care about now, others later on demand */
 707         mask = OHCI_INTR_INIT;
 708         ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
 709         ohci_writel (ohci, mask, &ohci->regs->intrenable);
 710
 711         /* handle root hub init quirks ... */
 712         val = roothub_a (ohci);
 713         val &= ~(RH_A_PSM | RH_A_OCPM);
 714         if (ohci->flags & OHCI_QUIRK_SUPERIO) {
 715                 /* NSC 87560 and maybe others */
 716                 val |= RH_A_NOCP;
 717                 val &= ~(RH_A_POTPGT | RH_A_NPS);
 718                 ohci_writel (ohci, val, &ohci->regs->roothub.a);
 719         } else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
 720                         (ohci->flags & OHCI_QUIRK_HUB_POWER)) {
 721                 /* hub power always on; required for AMD-756 and some
 722                  * Mac platforms.  ganged overcurrent reporting, if any.
 723                  */
 724                 val |= RH_A_NPS;
 725                 ohci_writel (ohci, val, &ohci->regs->roothub.a);
 726         }
 727         ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
 728         ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
 729                                                 &ohci->regs->roothub.b);
 730         // flush those writes
 731         (void) ohci_readl (ohci, &ohci->regs->control);
 732
 733         ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 734         spin_unlock_irq (&ohci->lock);
 735
 736         // POTPGT delay is bits 24-31, in 2 ms units.
 737         mdelay ((val >> 23) & 0x1fe);
 738         hcd->state = HC_STATE_RUNNING;
 739
 740         if (quirk_zfmicro(ohci)) {
 741                 /* Create timer to watch for bad queue state on ZF Micro */
 742                 setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
 743                                 (unsigned long) ohci);
 744
 745                 ohci->eds_scheduled = 0;
 746                 ohci->ed_to_check = NULL;
 747         }
 748
 749         ohci_dump (ohci, 1);
 750
 751         return 0;
 752 }
 753
 754 /*-------------------------------------------------------------------------*/
 755
 756 /* an interrupt happens */
 757
 758 static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 759 {
 760         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 761         struct ohci_regs __iomem *regs = ohci->regs;
 762         int                     ints;
 763
 764         /* Read interrupt status (and flush pending writes).  We ignore the
 765          * optimization of checking the LSB of hcca->done_head; it doesn't
 766          * work on all systems (edge triggering for OHCI can be a factor).
 767          */
 768         ints = ohci_readl(ohci, &regs->intrstatus);
 769
 770         /* Check for an all 1's result which is a typical consequence
 771          * of dead, unclocked, or unplugged (CardBus...) devices
 772          */
 773         if (ints == ~(u32)0) {
 774                 disable (ohci);
 775                 ohci_dbg (ohci, "device removed!\n");
 776                 usb_hc_died(hcd);
 777                 return IRQ_HANDLED;
 778         }
 779
 780         /* We only care about interrupts that are enabled */
 781         ints &= ohci_readl(ohci, &regs->intrenable);
 782
 783         /* interrupt for some other device? */
 784         if (ints == 0 || unlikely(hcd->state == HC_STATE_HALT))
 785                 return IRQ_NOTMINE;
 786
 787         if (ints & OHCI_INTR_UE) {
 788                 // e.g. due to PCI Master/Target Abort
 789                 if (quirk_nec(ohci)) {
 790                         /* Workaround for a silicon bug in some NEC chips used
 791                          * in Apple's PowerBooks. Adapted from Darwin code.
 792                          */
 793                         ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
 794
 795                         ohci_writel (ohci, OHCI_INTR_UE, &regs->intrdisable);
 796
 797                         schedule_work (&ohci->nec_work);
 798                 } else {
 799                         disable (ohci);
 800                         ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
 801                         usb_hc_died(hcd);
 802                 }
 803
 804                 ohci_dump (ohci, 1);
 805                 ohci_usb_reset (ohci);
 806         }
 807
 808         if (ints & OHCI_INTR_RHSC) {
 809                 ohci_vdbg(ohci, "rhsc\n");
 810                 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
 811                 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
 812                                 &regs->intrstatus);
 813
 814                 /* NOTE: Vendors didn't always make the same implementation
 815                  * choices for RHSC.  Many followed the spec; RHSC triggers
 816                  * on an edge, like setting and maybe clearing a port status
 817                  * change bit.  With others it's level-triggered, active
 818                  * until khubd clears all the port status change bits.  We'll
 819                  * always disable it here and rely on polling until khubd
 820                  * re-enables it.
 821                  */
 822                 ohci_writel(ohci, OHCI_INTR_RHSC, &regs->intrdisable);
 823                 usb_hcd_poll_rh_status(hcd);
 824         }
 825
 826         /* For connect and disconnect events, we expect the controller
 827          * to turn on RHSC along with RD.  But for remote wakeup events
 828          * this might not happen.
 829          */
 830         else if (ints & OHCI_INTR_RD) {
 831                 ohci_vdbg(ohci, "resume detect\n");
 832                 ohci_writel(ohci, OHCI_INTR_RD, &regs->intrstatus);
 833                 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 834                 if (ohci->autostop) {
 835                         spin_lock (&ohci->lock);
 836                         ohci_rh_resume (ohci);
 837                         spin_unlock (&ohci->lock);
 838                 } else
 839                         usb_hcd_resume_root_hub(hcd);
 840         }
 841
 842         if (ints & OHCI_INTR_WDH) {
 843                 spin_lock (&ohci->lock);
 844                 dl_done_list (ohci);
 845                 spin_unlock (&ohci->lock);
 846         }
 847
 848         if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
 849                 spin_lock(&ohci->lock);
 850                 if (ohci->ed_to_check) {
 851                         struct ed *ed = ohci->ed_to_check;
 852
 853                         if (check_ed(ohci, ed)) {
 854                                 /* HC thinks the TD list is empty; HCD knows
 855                                  * at least one TD is outstanding
 856                                  */
 857                                 if (--ohci->zf_delay == 0) {
 858                                         struct td *td = list_entry(
 859                                                 ed->td_list.next,
 860                                                 struct td, td_list);
 861                                         ohci_warn(ohci,
 862                                                   "Reclaiming orphan TD %p\n",
 863                                                   td);
 864                                         takeback_td(ohci, td);
 865                                         ohci->ed_to_check = NULL;
 866                                 }
 867                         } else
 868                                 ohci->ed_to_check = NULL;
 869                 }
 870                 spin_unlock(&ohci->lock);
 871         }
 872
 873         /* could track INTR_SO to reduce available PCI/... bandwidth */
 874
 875         /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
 876          * when there's still unlinking to be done (next frame).
 877          */
 878         spin_lock (&ohci->lock);
 879         if (ohci->ed_rm_list)
 880                 finish_unlinks (ohci, ohci_frame_no(ohci));
 881         if ((ints & OHCI_INTR_SF) != 0
 882                         && !ohci->ed_rm_list
 883                         && !ohci->ed_to_check
 884                         && HC_IS_RUNNING(hcd->state))
 885                 ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
 886         spin_unlock (&ohci->lock);
 887
 888         if (HC_IS_RUNNING(hcd->state)) {
 889                 ohci_writel (ohci, ints, &regs->intrstatus);
 890                 ohci_writel (ohci, OHCI_INTR_MIE, &regs->intrenable);
 891                 // flush those writes
 892                 (void) ohci_readl (ohci, &ohci->regs->control);
 893         }
 894
 895         return IRQ_HANDLED;
 896 }
 897
 898 /*-------------------------------------------------------------------------*/
 899
 900 static void ohci_stop (struct usb_hcd *hcd)
 901 {
 902         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 903
 904         ohci_dump (ohci, 1);
 905
 906         if (quirk_nec(ohci))
 907                 flush_work_sync(&ohci->nec_work);
 908
 909         ohci_usb_reset (ohci);
 910         ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 911         free_irq(hcd->irq, hcd);
 912         hcd->irq = -1;
 913
 914         if (quirk_zfmicro(ohci))
 915                 del_timer(&ohci->unlink_watchdog);
 916         if (quirk_amdiso(ohci))
 917                 amd_iso_dev_put();
 918
 919         remove_debug_files (ohci);
 920         ohci_mem_cleanup (ohci);
 921         if (ohci->hcca) {
 922                 dma_free_coherent (hcd->self.controller,
 923                                 sizeof *ohci->hcca,
 924                                 ohci->hcca, ohci->hcca_dma);
 925                 ohci->hcca = NULL;
 926                 ohci->hcca_dma = 0;
 927         }
 928 }
 929
 930 /*-------------------------------------------------------------------------*/
 931
 932 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
 933
 934 /* must not be called from interrupt context */
 935 static int ohci_restart (struct ohci_hcd *ohci)
 936 {
 937         int temp;
 938         int i;
 939         struct urb_priv *priv;
 940
 941         spin_lock_irq(&ohci->lock);
 942         disable (ohci);
 943
 944         /* Recycle any "live" eds/tds (and urbs). */
 945         if (!list_empty (&ohci->pending))
 946                 ohci_dbg(ohci, "abort schedule...\n");
 947         list_for_each_entry (priv, &ohci->pending, pending) {
 948                 struct urb      *urb = priv->td[0]->urb;
 949                 struct ed       *ed = priv->ed;
 950
 951                 switch (ed->state) {
 952                 case ED_OPER:
 953                         ed->state = ED_UNLINK;
 954                         ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
 955                         ed_deschedule (ohci, ed);
 956
 957                         ed->ed_next = ohci->ed_rm_list;
 958                         ed->ed_prev = NULL;
 959                         ohci->ed_rm_list = ed;
 960                         /* FALLTHROUGH */
 961                 case ED_UNLINK:
 962                         break;
 963                 default:
 964                         ohci_dbg(ohci, "bogus ed %p state %d\n",
 965                                         ed, ed->state);
 966                 }
 967
 968                 if (!urb->unlinked)
 969                         urb->unlinked = -ESHUTDOWN;
 970         }
 971         finish_unlinks (ohci, 0);
 972         spin_unlock_irq(&ohci->lock);
 973
 974         /* paranoia, in case that didn't work: */
 975
 976         /* empty the interrupt branches */
 977         for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
 978         for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
 979
 980         /* no EDs to remove */
 981         ohci->ed_rm_list = NULL;
 982
 983         /* empty control and bulk lists */
 984         ohci->ed_controltail = NULL;
 985         ohci->ed_bulktail    = NULL;
 986
 987         if ((temp = ohci_run (ohci)) < 0) {
 988                 ohci_err (ohci, "can't restart, %d\n", temp);
 989                 return temp;
 990         }
 991         ohci_dbg(ohci, "restart complete\n");
 992         return 0;
 993 }
 994
 995 #endif
 996
 997 /*-------------------------------------------------------------------------*/
 998
 999 MODULE_AUTHOR (DRIVER_AUTHOR);
1000 MODULE_DESCRIPTION(DRIVER_DESC);
1001 MODULE_LICENSE ("GPL");
1002
1003 #ifdef CONFIG_PCI
1004 #include "ohci-pci.c"
1005 #define PCI_DRIVER              ohci_pci_driver
1006 #endif
1007
1008 #if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
1009 #include "ohci-sa1111.c"
1010 #define SA1111_DRIVER           ohci_hcd_sa1111_driver
1011 #endif
1012
1013 #if defined(CONFIG_ARCH_S3C2410) || defined(CONFIG_ARCH_S3C64XX)
1014 #include "ohci-s3c2410.c"
1015 #define PLATFORM_DRIVER         ohci_hcd_s3c2410_driver
1016 #endif
1017
1018 #ifdef CONFIG_USB_OHCI_HCD_OMAP1
1019 #include "ohci-omap.c"
1020 #define OMAP1_PLATFORM_DRIVER   ohci_hcd_omap_driver
1021 #endif
1022
1023 #ifdef CONFIG_USB_OHCI_HCD_OMAP3
1024 #include "ohci-omap3.c"
1025 #define OMAP3_PLATFORM_DRIVER   ohci_hcd_omap3_driver
1026 #endif
1027
1028 #ifdef CONFIG_ARCH_LH7A404
1029 #include "ohci-lh7a404.c"
1030 #define PLATFORM_DRIVER         ohci_hcd_lh7a404_driver
1031 #endif
1032
1033 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
1034 #include "ohci-pxa27x.c"
1035 #define PLATFORM_DRIVER         ohci_hcd_pxa27x_driver
1036 #endif
1037
1038 #ifdef CONFIG_ARCH_EP93XX
1039 #include "ohci-ep93xx.c"
1040 #define PLATFORM_DRIVER         ohci_hcd_ep93xx_driver
1041 #endif
1042
1043 #ifdef CONFIG_MIPS_ALCHEMY
1044 #include "ohci-au1xxx.c"
1045 #define PLATFORM_DRIVER         ohci_hcd_au1xxx_driver
1046 #endif
1047
1048 #ifdef CONFIG_PNX8550
1049 #include "ohci-pnx8550.c"
1050 #define PLATFORM_DRIVER         ohci_hcd_pnx8550_driver
1051 #endif
1052
1053 #ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
1054 #include "ohci-ppc-soc.c"
1055 #define PLATFORM_DRIVER         ohci_hcd_ppc_soc_driver
1056 #endif
1057
1058 #ifdef CONFIG_ARCH_AT91
1059 #include "ohci-at91.c"
1060 #define PLATFORM_DRIVER         ohci_hcd_at91_driver
1061 #endif
1062
1063 #ifdef CONFIG_ARCH_PNX4008
1064 #include "ohci-pnx4008.c"
1065 #define PLATFORM_DRIVER         usb_hcd_pnx4008_driver
1066 #endif
1067
1068 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
1069 #include "ohci-da8xx.c"
1070 #define PLATFORM_DRIVER         ohci_hcd_da8xx_driver
1071 #endif
1072
1073 #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
1074     defined(CONFIG_CPU_SUBTYPE_SH7721) || \
1075     defined(CONFIG_CPU_SUBTYPE_SH7763) || \
1076     defined(CONFIG_CPU_SUBTYPE_SH7786)
1077 #include "ohci-sh.c"
1078 #define PLATFORM_DRIVER         ohci_hcd_sh_driver
1079 #endif
1080
1081
1082 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF
1083 #include "ohci-ppc-of.c"
1084 #define OF_PLATFORM_DRIVER      ohci_hcd_ppc_of_driver
1085 #endif
1086
1087 #ifdef CONFIG_PLAT_SPEAR
1088 #include "ohci-spear.c"
1089 #define PLATFORM_DRIVER         spear_ohci_hcd_driver
1090 #endif
1091
1092 #ifdef CONFIG_PPC_PS3
1093 #include "ohci-ps3.c"
1094 #define PS3_SYSTEM_BUS_DRIVER   ps3_ohci_driver
1095 #endif
1096
1097 #ifdef CONFIG_USB_OHCI_HCD_SSB
1098 #include "ohci-ssb.c"
1099 #define SSB_OHCI_DRIVER         ssb_ohci_driver
1100 #endif
1101
1102 #ifdef CONFIG_MFD_SM501
1103 #include "ohci-sm501.c"
1104 #define SM501_OHCI_DRIVER       ohci_hcd_sm501_driver
1105 #endif
1106
1107 #ifdef CONFIG_MFD_TC6393XB
1108 #include "ohci-tmio.c"
1109 #define TMIO_OHCI_DRIVER        ohci_hcd_tmio_driver
1110 #endif
1111
1112 #ifdef CONFIG_MACH_JZ4740
1113 #include "ohci-jz4740.c"
1114 #define PLATFORM_DRIVER ohci_hcd_jz4740_driver
1115 #endif
1116
1117 #ifdef CONFIG_USB_OCTEON_OHCI
1118 #include "ohci-octeon.c"
1119 #define PLATFORM_DRIVER         ohci_octeon_driver
1120 #endif
1121
1122 #ifdef CONFIG_USB_CNS3XXX_OHCI
1123 #include "ohci-cns3xxx.c"
1124 #define PLATFORM_DRIVER         ohci_hcd_cns3xxx_driver
1125 #endif
1126
1127 #if     !defined(PCI_DRIVER) &&         \
1128         !defined(PLATFORM_DRIVER) &&    \
1129         !defined(OMAP1_PLATFORM_DRIVER) &&      \
1130         !defined(OMAP3_PLATFORM_DRIVER) &&      \
1131         !defined(OF_PLATFORM_DRIVER) && \
1132         !defined(SA1111_DRIVER) &&      \
1133         !defined(PS3_SYSTEM_BUS_DRIVER) && \
1134         !defined(SM501_OHCI_DRIVER) && \
1135         !defined(TMIO_OHCI_DRIVER) && \
1136         !defined(SSB_OHCI_DRIVER)
1137 #error "missing bus glue for ohci-hcd"
1138 #endif
1139
1140 static int __init ohci_hcd_mod_init(void)
1141 {
1142         int retval = 0;
1143
1144         if (usb_disabled())
1145                 return -ENODEV;
1146
1147         printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1148         pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
1149                 sizeof (struct ed), sizeof (struct td));
1150         set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1151
1152 #ifdef DEBUG
1153         ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root);
1154         if (!ohci_debug_root) {
1155                 retval = -ENOENT;
1156                 goto error_debug;
1157         }
1158 #endif
1159
1160 #ifdef PS3_SYSTEM_BUS_DRIVER
1161         retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1162         if (retval < 0)
1163                 goto error_ps3;
1164 #endif
1165
1166 #ifdef PLATFORM_DRIVER
1167         retval = platform_driver_register(&PLATFORM_DRIVER);
1168         if (retval < 0)
1169                 goto error_platform;
1170 #endif
1171
1172 #ifdef OMAP1_PLATFORM_DRIVER
1173         retval = platform_driver_register(&OMAP1_PLATFORM_DRIVER);
1174         if (retval < 0)
1175                 goto error_omap1_platform;
1176 #endif
1177
1178 #ifdef OMAP3_PLATFORM_DRIVER
1179         retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER);
1180         if (retval < 0)
1181                 goto error_omap3_platform;
1182 #endif
1183
1184 #ifdef OF_PLATFORM_DRIVER
1185         retval = of_register_platform_driver(&OF_PLATFORM_DRIVER);
1186         if (retval < 0)
1187                 goto error_of_platform;
1188 #endif
1189
1190 #ifdef SA1111_DRIVER
1191         retval = sa1111_driver_register(&SA1111_DRIVER);
1192         if (retval < 0)
1193                 goto error_sa1111;
1194 #endif
1195
1196 #ifdef PCI_DRIVER
1197         retval = pci_register_driver(&PCI_DRIVER);
1198         if (retval < 0)
1199                 goto error_pci;
1200 #endif
1201
1202 #ifdef SSB_OHCI_DRIVER
1203         retval = ssb_driver_register(&SSB_OHCI_DRIVER);
1204         if (retval)
1205                 goto error_ssb;
1206 #endif
1207
1208 #ifdef SM501_OHCI_DRIVER
1209         retval = platform_driver_register(&SM501_OHCI_DRIVER);
1210         if (retval < 0)
1211                 goto error_sm501;
1212 #endif
1213
1214 #ifdef TMIO_OHCI_DRIVER
1215         retval = platform_driver_register(&TMIO_OHCI_DRIVER);
1216         if (retval < 0)
1217                 goto error_tmio;
1218 #endif
1219
1220         return retval;
1221
1222         /* Error path */
1223 #ifdef TMIO_OHCI_DRIVER
1224         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1225  error_tmio:
1226 #endif
1227 #ifdef SM501_OHCI_DRIVER
1228         platform_driver_unregister(&SM501_OHCI_DRIVER);
1229  error_sm501:
1230 #endif
1231 #ifdef SSB_OHCI_DRIVER
1232         ssb_driver_unregister(&SSB_OHCI_DRIVER);
1233  error_ssb:
1234 #endif
1235 #ifdef PCI_DRIVER
1236         pci_unregister_driver(&PCI_DRIVER);
1237  error_pci:
1238 #endif
1239 #ifdef SA1111_DRIVER
1240         sa1111_driver_unregister(&SA1111_DRIVER);
1241  error_sa1111:
1242 #endif
1243 #ifdef OF_PLATFORM_DRIVER
1244         of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1245  error_of_platform:
1246 #endif
1247 #ifdef PLATFORM_DRIVER
1248         platform_driver_unregister(&PLATFORM_DRIVER);
1249  error_platform:
1250 #endif
1251 #ifdef OMAP1_PLATFORM_DRIVER
1252         platform_driver_unregister(&OMAP1_PLATFORM_DRIVER);
1253  error_omap1_platform:
1254 #endif
1255 #ifdef OMAP3_PLATFORM_DRIVER
1256         platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
1257  error_omap3_platform:
1258 #endif
1259 #ifdef PS3_SYSTEM_BUS_DRIVER
1260         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1261  error_ps3:
1262 #endif
1263 #ifdef DEBUG
1264         debugfs_remove(ohci_debug_root);
1265         ohci_debug_root = NULL;
1266  error_debug:
1267 #endif
1268
1269         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1270         return retval;
1271 }
1272 module_init(ohci_hcd_mod_init);
1273
1274 static void __exit ohci_hcd_mod_exit(void)
1275 {
1276 #ifdef TMIO_OHCI_DRIVER
1277         platform_driver_unregister(&TMIO_OHCI_DRIVER);
1278 #endif
1279 #ifdef SM501_OHCI_DRIVER
1280         platform_driver_unregister(&SM501_OHCI_DRIVER);
1281 #endif
1282 #ifdef SSB_OHCI_DRIVER
1283         ssb_driver_unregister(&SSB_OHCI_DRIVER);
1284 #endif
1285 #ifdef PCI_DRIVER
1286         pci_unregister_driver(&PCI_DRIVER);
1287 #endif
1288 #ifdef SA1111_DRIVER
1289         sa1111_driver_unregister(&SA1111_DRIVER);
1290 #endif
1291 #ifdef OF_PLATFORM_DRIVER
1292         of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1293 #endif
1294 #ifdef PLATFORM_DRIVER
1295         platform_driver_unregister(&PLATFORM_DRIVER);
1296 #endif
1297 #ifdef OMAP3_PLATFORM_DRIVER
1298         platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
1299 #endif
1300 #ifdef PS3_SYSTEM_BUS_DRIVER
1301         ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1302 #endif
1303 #ifdef DEBUG
1304         debugfs_remove(ohci_debug_root);
1305 #endif
1306         clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1307 }
1308 module_exit(ohci_hcd_mod_exit);
1309