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 /* For initializing controller (mask in an HCFS mode too) */ 55 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR 56 #define OHCI_INTR_INIT \ 57 (OHCI_INTR_MIE | OHCI_INTR_RHSC | OHCI_INTR_UE \ 58 | OHCI_INTR_RD | OHCI_INTR_WDH) 59 60 #ifdef __hppa__ 61 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */ 62 #define IR_DISABLE 63 #endif 64 65 #ifdef CONFIG_ARCH_OMAP 66 /* OMAP doesn't support IR (no SMM; not needed) */ 67 #define IR_DISABLE 68 #endif 69 70 /*-------------------------------------------------------------------------*/ 71 72 static const char hcd_name [] = "ohci_hcd"; 73 74 #define STATECHANGE_DELAY msecs_to_jiffies(300) 75 #define IO_WATCHDOG_DELAY msecs_to_jiffies(275) 76 77 #include "ohci.h" 78 #include "pci-quirks.h" 79 80 static void ohci_dump(struct ohci_hcd *ohci); 81 static void ohci_stop(struct usb_hcd *hcd); 82 static void io_watchdog_func(unsigned long _ohci); 83 84 #include "ohci-hub.c" 85 #include "ohci-dbg.c" 86 #include "ohci-mem.c" 87 #include "ohci-q.c" 88 89 90 /* 91 * On architectures with edge-triggered interrupts we must never return 92 * IRQ_NONE. 93 */ 94 #if defined(CONFIG_SA1111) /* ... or other edge-triggered systems */ 95 #define IRQ_NOTMINE IRQ_HANDLED 96 #else 97 #define IRQ_NOTMINE IRQ_NONE 98 #endif 99 100 101 /* Some boards misreport power switching/overcurrent */ 102 static bool distrust_firmware = true; 103 module_param (distrust_firmware, bool, 0); 104 MODULE_PARM_DESC (distrust_firmware, 105 "true to distrust firmware power/overcurrent setup"); 106 107 /* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */ 108 static bool no_handshake; 109 module_param (no_handshake, bool, 0); 110 MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake"); 111 112 /*-------------------------------------------------------------------------*/ 113 114 static int number_of_tds(struct urb *urb) 115 { 116 int len, i, num, this_sg_len; 117 struct scatterlist *sg; 118 119 len = urb->transfer_buffer_length; 120 i = urb->num_mapped_sgs; 121 122 if (len > 0 && i > 0) { /* Scatter-gather transfer */ 123 num = 0; 124 sg = urb->sg; 125 for (;;) { 126 this_sg_len = min_t(int, sg_dma_len(sg), len); 127 num += DIV_ROUND_UP(this_sg_len, 4096); 128 len -= this_sg_len; 129 if (--i <= 0 || len <= 0) 130 break; 131 sg = sg_next(sg); 132 } 133 134 } else { /* Non-SG transfer */ 135 /* one TD for every 4096 Bytes (could be up to 8K) */ 136 num = DIV_ROUND_UP(len, 4096); 137 } 138 return num; 139 } 140 141 /* 142 * queue up an urb for anything except the root hub 143 */ 144 static int ohci_urb_enqueue ( 145 struct usb_hcd *hcd, 146 struct urb *urb, 147 gfp_t mem_flags 148 ) { 149 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 150 struct ed *ed; 151 urb_priv_t *urb_priv; 152 unsigned int pipe = urb->pipe; 153 int i, size = 0; 154 unsigned long flags; 155 int retval = 0; 156 157 /* every endpoint has a ed, locate and maybe (re)initialize it */ 158 ed = ed_get(ohci, urb->ep, urb->dev, pipe, urb->interval); 159 if (! ed) 160 return -ENOMEM; 161 162 /* for the private part of the URB we need the number of TDs (size) */ 163 switch (ed->type) { 164 case PIPE_CONTROL: 165 /* td_submit_urb() doesn't yet handle these */ 166 if (urb->transfer_buffer_length > 4096) 167 return -EMSGSIZE; 168 169 /* 1 TD for setup, 1 for ACK, plus ... */ 170 size = 2; 171 /* FALLTHROUGH */ 172 // case PIPE_INTERRUPT: 173 // case PIPE_BULK: 174 default: 175 size += number_of_tds(urb); 176 /* maybe a zero-length packet to wrap it up */ 177 if (size == 0) 178 size++; 179 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0 180 && (urb->transfer_buffer_length 181 % usb_maxpacket (urb->dev, pipe, 182 usb_pipeout (pipe))) == 0) 183 size++; 184 break; 185 case PIPE_ISOCHRONOUS: /* number of packets from URB */ 186 size = urb->number_of_packets; 187 break; 188 } 189 190 /* allocate the private part of the URB */ 191 urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *), 192 mem_flags); 193 if (!urb_priv) 194 return -ENOMEM; 195 INIT_LIST_HEAD (&urb_priv->pending); 196 urb_priv->length = size; 197 urb_priv->ed = ed; 198 199 /* allocate the TDs (deferring hash chain updates) */ 200 for (i = 0; i < size; i++) { 201 urb_priv->td [i] = td_alloc (ohci, mem_flags); 202 if (!urb_priv->td [i]) { 203 urb_priv->length = i; 204 urb_free_priv (ohci, urb_priv); 205 return -ENOMEM; 206 } 207 } 208 209 spin_lock_irqsave (&ohci->lock, flags); 210 211 /* don't submit to a dead HC */ 212 if (!HCD_HW_ACCESSIBLE(hcd)) { 213 retval = -ENODEV; 214 goto fail; 215 } 216 if (ohci->rh_state != OHCI_RH_RUNNING) { 217 retval = -ENODEV; 218 goto fail; 219 } 220 retval = usb_hcd_link_urb_to_ep(hcd, urb); 221 if (retval) 222 goto fail; 223 224 /* schedule the ed if needed */ 225 if (ed->state == ED_IDLE) { 226 retval = ed_schedule (ohci, ed); 227 if (retval < 0) { 228 usb_hcd_unlink_urb_from_ep(hcd, urb); 229 goto fail; 230 } 231 232 /* Start up the I/O watchdog timer, if it's not running */ 233 if (!timer_pending(&ohci->io_watchdog) && 234 list_empty(&ohci->eds_in_use)) { 235 ohci->prev_frame_no = ohci_frame_no(ohci); 236 mod_timer(&ohci->io_watchdog, 237 jiffies + IO_WATCHDOG_DELAY); 238 } 239 list_add(&ed->in_use_list, &ohci->eds_in_use); 240 241 if (ed->type == PIPE_ISOCHRONOUS) { 242 u16 frame = ohci_frame_no(ohci); 243 244 /* delay a few frames before the first TD */ 245 frame += max_t (u16, 8, ed->interval); 246 frame &= ~(ed->interval - 1); 247 frame |= ed->branch; 248 urb->start_frame = frame; 249 ed->last_iso = frame + ed->interval * (size - 1); 250 } 251 } else if (ed->type == PIPE_ISOCHRONOUS) { 252 u16 next = ohci_frame_no(ohci) + 1; 253 u16 frame = ed->last_iso + ed->interval; 254 u16 length = ed->interval * (size - 1); 255 256 /* Behind the scheduling threshold? */ 257 if (unlikely(tick_before(frame, next))) { 258 259 /* URB_ISO_ASAP: Round up to the first available slot */ 260 if (urb->transfer_flags & URB_ISO_ASAP) { 261 frame += (next - frame + ed->interval - 1) & 262 -ed->interval; 263 264 /* 265 * Not ASAP: Use the next slot in the stream, 266 * no matter what. 267 */ 268 } else { 269 /* 270 * Some OHCI hardware doesn't handle late TDs 271 * correctly. After retiring them it proceeds 272 * to the next ED instead of the next TD. 273 * Therefore we have to omit the late TDs 274 * entirely. 275 */ 276 urb_priv->td_cnt = DIV_ROUND_UP( 277 (u16) (next - frame), 278 ed->interval); 279 if (urb_priv->td_cnt >= urb_priv->length) { 280 ++urb_priv->td_cnt; /* Mark it */ 281 ohci_dbg(ohci, "iso underrun %p (%u+%u < %u)\n", 282 urb, frame, length, 283 next); 284 } 285 } 286 } 287 urb->start_frame = frame; 288 ed->last_iso = frame + length; 289 } 290 291 /* fill the TDs and link them to the ed; and 292 * enable that part of the schedule, if needed 293 * and update count of queued periodic urbs 294 */ 295 urb->hcpriv = urb_priv; 296 td_submit_urb (ohci, urb); 297 298 fail: 299 if (retval) 300 urb_free_priv (ohci, urb_priv); 301 spin_unlock_irqrestore (&ohci->lock, flags); 302 return retval; 303 } 304 305 /* 306 * decouple the URB from the HC queues (TDs, urb_priv). 307 * reporting is always done 308 * asynchronously, and we might be dealing with an urb that's 309 * partially transferred, or an ED with other urbs being unlinked. 310 */ 311 static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 312 { 313 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 314 unsigned long flags; 315 int rc; 316 urb_priv_t *urb_priv; 317 318 spin_lock_irqsave (&ohci->lock, flags); 319 rc = usb_hcd_check_unlink_urb(hcd, urb, status); 320 if (rc == 0) { 321 322 /* Unless an IRQ completed the unlink while it was being 323 * handed to us, flag it for unlink and giveback, and force 324 * some upcoming INTR_SF to call finish_unlinks() 325 */ 326 urb_priv = urb->hcpriv; 327 if (urb_priv->ed->state == ED_OPER) 328 start_ed_unlink(ohci, urb_priv->ed); 329 330 if (ohci->rh_state != OHCI_RH_RUNNING) { 331 /* With HC dead, we can clean up right away */ 332 ohci_work(ohci); 333 } 334 } 335 spin_unlock_irqrestore (&ohci->lock, flags); 336 return rc; 337 } 338 339 /*-------------------------------------------------------------------------*/ 340 341 /* frees config/altsetting state for endpoints, 342 * including ED memory, dummy TD, and bulk/intr data toggle 343 */ 344 345 static void 346 ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep) 347 { 348 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 349 unsigned long flags; 350 struct ed *ed = ep->hcpriv; 351 unsigned limit = 1000; 352 353 /* ASSERT: any requests/urbs are being unlinked */ 354 /* ASSERT: nobody can be submitting urbs for this any more */ 355 356 if (!ed) 357 return; 358 359 rescan: 360 spin_lock_irqsave (&ohci->lock, flags); 361 362 if (ohci->rh_state != OHCI_RH_RUNNING) { 363 sanitize: 364 ed->state = ED_IDLE; 365 ohci_work(ohci); 366 } 367 368 switch (ed->state) { 369 case ED_UNLINK: /* wait for hw to finish? */ 370 /* major IRQ delivery trouble loses INTR_SF too... */ 371 if (limit-- == 0) { 372 ohci_warn(ohci, "ED unlink timeout\n"); 373 goto sanitize; 374 } 375 spin_unlock_irqrestore (&ohci->lock, flags); 376 schedule_timeout_uninterruptible(1); 377 goto rescan; 378 case ED_IDLE: /* fully unlinked */ 379 if (list_empty (&ed->td_list)) { 380 td_free (ohci, ed->dummy); 381 ed_free (ohci, ed); 382 break; 383 } 384 /* else FALL THROUGH */ 385 default: 386 /* caller was supposed to have unlinked any requests; 387 * that's not our job. can't recover; must leak ed. 388 */ 389 ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n", 390 ed, ep->desc.bEndpointAddress, ed->state, 391 list_empty (&ed->td_list) ? "" : " (has tds)"); 392 td_free (ohci, ed->dummy); 393 break; 394 } 395 ep->hcpriv = NULL; 396 spin_unlock_irqrestore (&ohci->lock, flags); 397 } 398 399 static int ohci_get_frame (struct usb_hcd *hcd) 400 { 401 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 402 403 return ohci_frame_no(ohci); 404 } 405 406 static void ohci_usb_reset (struct ohci_hcd *ohci) 407 { 408 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); 409 ohci->hc_control &= OHCI_CTRL_RWC; 410 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); 411 ohci->rh_state = OHCI_RH_HALTED; 412 } 413 414 /* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and 415 * other cases where the next software may expect clean state from the 416 * "firmware". this is bus-neutral, unlike shutdown() methods. 417 */ 418 static void 419 ohci_shutdown (struct usb_hcd *hcd) 420 { 421 struct ohci_hcd *ohci; 422 423 ohci = hcd_to_ohci (hcd); 424 ohci_writel(ohci, (u32) ~0, &ohci->regs->intrdisable); 425 426 /* Software reset, after which the controller goes into SUSPEND */ 427 ohci_writel(ohci, OHCI_HCR, &ohci->regs->cmdstatus); 428 ohci_readl(ohci, &ohci->regs->cmdstatus); /* flush the writes */ 429 udelay(10); 430 431 ohci_writel(ohci, ohci->fminterval, &ohci->regs->fminterval); 432 ohci->rh_state = OHCI_RH_HALTED; 433 } 434 435 /*-------------------------------------------------------------------------* 436 * HC functions 437 *-------------------------------------------------------------------------*/ 438 439 /* init memory, and kick BIOS/SMM off */ 440 441 static int ohci_init (struct ohci_hcd *ohci) 442 { 443 int ret; 444 struct usb_hcd *hcd = ohci_to_hcd(ohci); 445 446 /* Accept arbitrarily long scatter-gather lists */ 447 hcd->self.sg_tablesize = ~0; 448 449 if (distrust_firmware) 450 ohci->flags |= OHCI_QUIRK_HUB_POWER; 451 452 ohci->rh_state = OHCI_RH_HALTED; 453 ohci->regs = hcd->regs; 454 455 /* REVISIT this BIOS handshake is now moved into PCI "quirks", and 456 * was never needed for most non-PCI systems ... remove the code? 457 */ 458 459 #ifndef IR_DISABLE 460 /* SMM owns the HC? not for long! */ 461 if (!no_handshake && ohci_readl (ohci, 462 &ohci->regs->control) & OHCI_CTRL_IR) { 463 u32 temp; 464 465 ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n"); 466 467 /* this timeout is arbitrary. we make it long, so systems 468 * depending on usb keyboards may be usable even if the 469 * BIOS/SMM code seems pretty broken. 470 */ 471 temp = 500; /* arbitrary: five seconds */ 472 473 ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable); 474 ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus); 475 while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) { 476 msleep (10); 477 if (--temp == 0) { 478 ohci_err (ohci, "USB HC takeover failed!" 479 " (BIOS/SMM bug)\n"); 480 return -EBUSY; 481 } 482 } 483 ohci_usb_reset (ohci); 484 } 485 #endif 486 487 /* Disable HC interrupts */ 488 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); 489 490 /* flush the writes, and save key bits like RWC */ 491 if (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_RWC) 492 ohci->hc_control |= OHCI_CTRL_RWC; 493 494 /* Read the number of ports unless overridden */ 495 if (ohci->num_ports == 0) 496 ohci->num_ports = roothub_a(ohci) & RH_A_NDP; 497 498 if (ohci->hcca) 499 return 0; 500 501 setup_timer(&ohci->io_watchdog, io_watchdog_func, 502 (unsigned long) ohci); 503 504 ohci->hcca = dma_alloc_coherent (hcd->self.controller, 505 sizeof(*ohci->hcca), &ohci->hcca_dma, GFP_KERNEL); 506 if (!ohci->hcca) 507 return -ENOMEM; 508 509 if ((ret = ohci_mem_init (ohci)) < 0) 510 ohci_stop (hcd); 511 else { 512 create_debug_files (ohci); 513 } 514 515 return ret; 516 } 517 518 /*-------------------------------------------------------------------------*/ 519 520 /* Start an OHCI controller, set the BUS operational 521 * resets USB and controller 522 * enable interrupts 523 */ 524 static int ohci_run (struct ohci_hcd *ohci) 525 { 526 u32 mask, val; 527 int first = ohci->fminterval == 0; 528 struct usb_hcd *hcd = ohci_to_hcd(ohci); 529 530 ohci->rh_state = OHCI_RH_HALTED; 531 532 /* boot firmware should have set this up (5.1.1.3.1) */ 533 if (first) { 534 535 val = ohci_readl (ohci, &ohci->regs->fminterval); 536 ohci->fminterval = val & 0x3fff; 537 if (ohci->fminterval != FI) 538 ohci_dbg (ohci, "fminterval delta %d\n", 539 ohci->fminterval - FI); 540 ohci->fminterval |= FSMP (ohci->fminterval) << 16; 541 /* also: power/overcurrent flags in roothub.a */ 542 } 543 544 /* Reset USB nearly "by the book". RemoteWakeupConnected has 545 * to be checked in case boot firmware (BIOS/SMM/...) has set up 546 * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM). 547 * If the bus glue detected wakeup capability then it should 548 * already be enabled; if so we'll just enable it again. 549 */ 550 if ((ohci->hc_control & OHCI_CTRL_RWC) != 0) 551 device_set_wakeup_capable(hcd->self.controller, 1); 552 553 switch (ohci->hc_control & OHCI_CTRL_HCFS) { 554 case OHCI_USB_OPER: 555 val = 0; 556 break; 557 case OHCI_USB_SUSPEND: 558 case OHCI_USB_RESUME: 559 ohci->hc_control &= OHCI_CTRL_RWC; 560 ohci->hc_control |= OHCI_USB_RESUME; 561 val = 10 /* msec wait */; 562 break; 563 // case OHCI_USB_RESET: 564 default: 565 ohci->hc_control &= OHCI_CTRL_RWC; 566 ohci->hc_control |= OHCI_USB_RESET; 567 val = 50 /* msec wait */; 568 break; 569 } 570 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); 571 // flush the writes 572 (void) ohci_readl (ohci, &ohci->regs->control); 573 msleep(val); 574 575 memset (ohci->hcca, 0, sizeof (struct ohci_hcca)); 576 577 /* 2msec timelimit here means no irqs/preempt */ 578 spin_lock_irq (&ohci->lock); 579 580 retry: 581 /* HC Reset requires max 10 us delay */ 582 ohci_writel (ohci, OHCI_HCR, &ohci->regs->cmdstatus); 583 val = 30; /* ... allow extra time */ 584 while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) { 585 if (--val == 0) { 586 spin_unlock_irq (&ohci->lock); 587 ohci_err (ohci, "USB HC reset timed out!\n"); 588 return -1; 589 } 590 udelay (1); 591 } 592 593 /* now we're in the SUSPEND state ... must go OPERATIONAL 594 * within 2msec else HC enters RESUME 595 * 596 * ... but some hardware won't init fmInterval "by the book" 597 * (SiS, OPTi ...), so reset again instead. SiS doesn't need 598 * this if we write fmInterval after we're OPERATIONAL. 599 * Unclear about ALi, ServerWorks, and others ... this could 600 * easily be a longstanding bug in chip init on Linux. 601 */ 602 if (ohci->flags & OHCI_QUIRK_INITRESET) { 603 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); 604 // flush those writes 605 (void) ohci_readl (ohci, &ohci->regs->control); 606 } 607 608 /* Tell the controller where the control and bulk lists are 609 * The lists are empty now. */ 610 ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); 611 ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); 612 613 /* a reset clears this */ 614 ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); 615 616 periodic_reinit (ohci); 617 618 /* some OHCI implementations are finicky about how they init. 619 * bogus values here mean not even enumeration could work. 620 */ 621 if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0 622 || !ohci_readl (ohci, &ohci->regs->periodicstart)) { 623 if (!(ohci->flags & OHCI_QUIRK_INITRESET)) { 624 ohci->flags |= OHCI_QUIRK_INITRESET; 625 ohci_dbg (ohci, "enabling initreset quirk\n"); 626 goto retry; 627 } 628 spin_unlock_irq (&ohci->lock); 629 ohci_err (ohci, "init err (%08x %04x)\n", 630 ohci_readl (ohci, &ohci->regs->fminterval), 631 ohci_readl (ohci, &ohci->regs->periodicstart)); 632 return -EOVERFLOW; 633 } 634 635 /* use rhsc irqs after hub_wq is allocated */ 636 set_bit(HCD_FLAG_POLL_RH, &hcd->flags); 637 hcd->uses_new_polling = 1; 638 639 /* start controller operations */ 640 ohci->hc_control &= OHCI_CTRL_RWC; 641 ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER; 642 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); 643 ohci->rh_state = OHCI_RH_RUNNING; 644 645 /* wake on ConnectStatusChange, matching external hubs */ 646 ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status); 647 648 /* Choose the interrupts we care about now, others later on demand */ 649 mask = OHCI_INTR_INIT; 650 ohci_writel (ohci, ~0, &ohci->regs->intrstatus); 651 ohci_writel (ohci, mask, &ohci->regs->intrenable); 652 653 /* handle root hub init quirks ... */ 654 val = roothub_a (ohci); 655 val &= ~(RH_A_PSM | RH_A_OCPM); 656 if (ohci->flags & OHCI_QUIRK_SUPERIO) { 657 /* NSC 87560 and maybe others */ 658 val |= RH_A_NOCP; 659 val &= ~(RH_A_POTPGT | RH_A_NPS); 660 ohci_writel (ohci, val, &ohci->regs->roothub.a); 661 } else if ((ohci->flags & OHCI_QUIRK_AMD756) || 662 (ohci->flags & OHCI_QUIRK_HUB_POWER)) { 663 /* hub power always on; required for AMD-756 and some 664 * Mac platforms. ganged overcurrent reporting, if any. 665 */ 666 val |= RH_A_NPS; 667 ohci_writel (ohci, val, &ohci->regs->roothub.a); 668 } 669 ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status); 670 ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM, 671 &ohci->regs->roothub.b); 672 // flush those writes 673 (void) ohci_readl (ohci, &ohci->regs->control); 674 675 ohci->next_statechange = jiffies + STATECHANGE_DELAY; 676 spin_unlock_irq (&ohci->lock); 677 678 // POTPGT delay is bits 24-31, in 2 ms units. 679 mdelay ((val >> 23) & 0x1fe); 680 681 ohci_dump(ohci); 682 683 return 0; 684 } 685 686 /* ohci_setup routine for generic controller initialization */ 687 688 int ohci_setup(struct usb_hcd *hcd) 689 { 690 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 691 692 ohci_hcd_init(ohci); 693 694 return ohci_init(ohci); 695 } 696 EXPORT_SYMBOL_GPL(ohci_setup); 697 698 /* ohci_start routine for generic controller start of all OHCI bus glue */ 699 static int ohci_start(struct usb_hcd *hcd) 700 { 701 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 702 int ret; 703 704 ret = ohci_run(ohci); 705 if (ret < 0) { 706 ohci_err(ohci, "can't start\n"); 707 ohci_stop(hcd); 708 } 709 return ret; 710 } 711 712 /*-------------------------------------------------------------------------*/ 713 714 /* 715 * Some OHCI controllers are known to lose track of completed TDs. They 716 * don't add the TDs to the hardware done queue, which means we never see 717 * them as being completed. 718 * 719 * This watchdog routine checks for such problems. Without some way to 720 * tell when those TDs have completed, we would never take their EDs off 721 * the unlink list. As a result, URBs could never be dequeued and 722 * endpoints could never be released. 723 */ 724 static void io_watchdog_func(unsigned long _ohci) 725 { 726 struct ohci_hcd *ohci = (struct ohci_hcd *) _ohci; 727 bool takeback_all_pending = false; 728 u32 status; 729 u32 head; 730 struct ed *ed; 731 struct td *td, *td_start, *td_next; 732 unsigned frame_no; 733 unsigned long flags; 734 735 spin_lock_irqsave(&ohci->lock, flags); 736 737 /* 738 * One way to lose track of completed TDs is if the controller 739 * never writes back the done queue head. If it hasn't been 740 * written back since the last time this function ran and if it 741 * was non-empty at that time, something is badly wrong with the 742 * hardware. 743 */ 744 status = ohci_readl(ohci, &ohci->regs->intrstatus); 745 if (!(status & OHCI_INTR_WDH) && ohci->wdh_cnt == ohci->prev_wdh_cnt) { 746 if (ohci->prev_donehead) { 747 ohci_err(ohci, "HcDoneHead not written back; disabled\n"); 748 died: 749 usb_hc_died(ohci_to_hcd(ohci)); 750 ohci_dump(ohci); 751 ohci_shutdown(ohci_to_hcd(ohci)); 752 goto done; 753 } else { 754 /* No write back because the done queue was empty */ 755 takeback_all_pending = true; 756 } 757 } 758 759 /* Check every ED which might have pending TDs */ 760 list_for_each_entry(ed, &ohci->eds_in_use, in_use_list) { 761 if (ed->pending_td) { 762 if (takeback_all_pending || 763 OKAY_TO_TAKEBACK(ohci, ed)) { 764 unsigned tmp = hc32_to_cpu(ohci, ed->hwINFO); 765 766 ohci_dbg(ohci, "takeback pending TD for dev %d ep 0x%x\n", 767 0x007f & tmp, 768 (0x000f & (tmp >> 7)) + 769 ((tmp & ED_IN) >> 5)); 770 add_to_done_list(ohci, ed->pending_td); 771 } 772 } 773 774 /* Starting from the latest pending TD, */ 775 td = ed->pending_td; 776 777 /* or the last TD on the done list, */ 778 if (!td) { 779 list_for_each_entry(td_next, &ed->td_list, td_list) { 780 if (!td_next->next_dl_td) 781 break; 782 td = td_next; 783 } 784 } 785 786 /* find the last TD processed by the controller. */ 787 head = hc32_to_cpu(ohci, ACCESS_ONCE(ed->hwHeadP)) & TD_MASK; 788 td_start = td; 789 td_next = list_prepare_entry(td, &ed->td_list, td_list); 790 list_for_each_entry_continue(td_next, &ed->td_list, td_list) { 791 if (head == (u32) td_next->td_dma) 792 break; 793 td = td_next; /* head pointer has passed this TD */ 794 } 795 if (td != td_start) { 796 /* 797 * In case a WDH cycle is in progress, we will wait 798 * for the next two cycles to complete before assuming 799 * this TD will never get on the done queue. 800 */ 801 ed->takeback_wdh_cnt = ohci->wdh_cnt + 2; 802 ed->pending_td = td; 803 } 804 } 805 806 ohci_work(ohci); 807 808 if (ohci->rh_state == OHCI_RH_RUNNING) { 809 810 /* 811 * Sometimes a controller just stops working. We can tell 812 * by checking that the frame counter has advanced since 813 * the last time we ran. 814 * 815 * But be careful: Some controllers violate the spec by 816 * stopping their frame counter when no ports are active. 817 */ 818 frame_no = ohci_frame_no(ohci); 819 if (frame_no == ohci->prev_frame_no) { 820 int active_cnt = 0; 821 int i; 822 unsigned tmp; 823 824 for (i = 0; i < ohci->num_ports; ++i) { 825 tmp = roothub_portstatus(ohci, i); 826 /* Enabled and not suspended? */ 827 if ((tmp & RH_PS_PES) && !(tmp & RH_PS_PSS)) 828 ++active_cnt; 829 } 830 831 if (active_cnt > 0) { 832 ohci_err(ohci, "frame counter not updating; disabled\n"); 833 goto died; 834 } 835 } 836 if (!list_empty(&ohci->eds_in_use)) { 837 ohci->prev_frame_no = frame_no; 838 ohci->prev_wdh_cnt = ohci->wdh_cnt; 839 ohci->prev_donehead = ohci_readl(ohci, 840 &ohci->regs->donehead); 841 mod_timer(&ohci->io_watchdog, 842 jiffies + IO_WATCHDOG_DELAY); 843 } 844 } 845 846 done: 847 spin_unlock_irqrestore(&ohci->lock, flags); 848 } 849 850 /* an interrupt happens */ 851 852 static irqreturn_t ohci_irq (struct usb_hcd *hcd) 853 { 854 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 855 struct ohci_regs __iomem *regs = ohci->regs; 856 int ints; 857 858 /* Read interrupt status (and flush pending writes). We ignore the 859 * optimization of checking the LSB of hcca->done_head; it doesn't 860 * work on all systems (edge triggering for OHCI can be a factor). 861 */ 862 ints = ohci_readl(ohci, ®s->intrstatus); 863 864 /* Check for an all 1's result which is a typical consequence 865 * of dead, unclocked, or unplugged (CardBus...) devices 866 */ 867 if (ints == ~(u32)0) { 868 ohci->rh_state = OHCI_RH_HALTED; 869 ohci_dbg (ohci, "device removed!\n"); 870 usb_hc_died(hcd); 871 return IRQ_HANDLED; 872 } 873 874 /* We only care about interrupts that are enabled */ 875 ints &= ohci_readl(ohci, ®s->intrenable); 876 877 /* interrupt for some other device? */ 878 if (ints == 0 || unlikely(ohci->rh_state == OHCI_RH_HALTED)) 879 return IRQ_NOTMINE; 880 881 if (ints & OHCI_INTR_UE) { 882 // e.g. due to PCI Master/Target Abort 883 if (quirk_nec(ohci)) { 884 /* Workaround for a silicon bug in some NEC chips used 885 * in Apple's PowerBooks. Adapted from Darwin code. 886 */ 887 ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n"); 888 889 ohci_writel (ohci, OHCI_INTR_UE, ®s->intrdisable); 890 891 schedule_work (&ohci->nec_work); 892 } else { 893 ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n"); 894 ohci->rh_state = OHCI_RH_HALTED; 895 usb_hc_died(hcd); 896 } 897 898 ohci_dump(ohci); 899 ohci_usb_reset (ohci); 900 } 901 902 if (ints & OHCI_INTR_RHSC) { 903 ohci_dbg(ohci, "rhsc\n"); 904 ohci->next_statechange = jiffies + STATECHANGE_DELAY; 905 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC, 906 ®s->intrstatus); 907 908 /* NOTE: Vendors didn't always make the same implementation 909 * choices for RHSC. Many followed the spec; RHSC triggers 910 * on an edge, like setting and maybe clearing a port status 911 * change bit. With others it's level-triggered, active 912 * until hub_wq clears all the port status change bits. We'll 913 * always disable it here and rely on polling until hub_wq 914 * re-enables it. 915 */ 916 ohci_writel(ohci, OHCI_INTR_RHSC, ®s->intrdisable); 917 usb_hcd_poll_rh_status(hcd); 918 } 919 920 /* For connect and disconnect events, we expect the controller 921 * to turn on RHSC along with RD. But for remote wakeup events 922 * this might not happen. 923 */ 924 else if (ints & OHCI_INTR_RD) { 925 ohci_dbg(ohci, "resume detect\n"); 926 ohci_writel(ohci, OHCI_INTR_RD, ®s->intrstatus); 927 set_bit(HCD_FLAG_POLL_RH, &hcd->flags); 928 if (ohci->autostop) { 929 spin_lock (&ohci->lock); 930 ohci_rh_resume (ohci); 931 spin_unlock (&ohci->lock); 932 } else 933 usb_hcd_resume_root_hub(hcd); 934 } 935 936 spin_lock(&ohci->lock); 937 if (ints & OHCI_INTR_WDH) 938 update_done_list(ohci); 939 940 /* could track INTR_SO to reduce available PCI/... bandwidth */ 941 942 /* handle any pending URB/ED unlinks, leaving INTR_SF enabled 943 * when there's still unlinking to be done (next frame). 944 */ 945 ohci_work(ohci); 946 if ((ints & OHCI_INTR_SF) != 0 && !ohci->ed_rm_list 947 && ohci->rh_state == OHCI_RH_RUNNING) 948 ohci_writel (ohci, OHCI_INTR_SF, ®s->intrdisable); 949 950 if (ohci->rh_state == OHCI_RH_RUNNING) { 951 ohci_writel (ohci, ints, ®s->intrstatus); 952 if (ints & OHCI_INTR_WDH) 953 ++ohci->wdh_cnt; 954 955 ohci_writel (ohci, OHCI_INTR_MIE, ®s->intrenable); 956 // flush those writes 957 (void) ohci_readl (ohci, &ohci->regs->control); 958 } 959 spin_unlock(&ohci->lock); 960 961 return IRQ_HANDLED; 962 } 963 964 /*-------------------------------------------------------------------------*/ 965 966 static void ohci_stop (struct usb_hcd *hcd) 967 { 968 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 969 970 ohci_dump(ohci); 971 972 if (quirk_nec(ohci)) 973 flush_work(&ohci->nec_work); 974 del_timer_sync(&ohci->io_watchdog); 975 976 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); 977 ohci_usb_reset(ohci); 978 free_irq(hcd->irq, hcd); 979 hcd->irq = 0; 980 981 if (quirk_amdiso(ohci)) 982 usb_amd_dev_put(); 983 984 remove_debug_files (ohci); 985 ohci_mem_cleanup (ohci); 986 if (ohci->hcca) { 987 dma_free_coherent (hcd->self.controller, 988 sizeof *ohci->hcca, 989 ohci->hcca, ohci->hcca_dma); 990 ohci->hcca = NULL; 991 ohci->hcca_dma = 0; 992 } 993 } 994 995 /*-------------------------------------------------------------------------*/ 996 997 #if defined(CONFIG_PM) || defined(CONFIG_PCI) 998 999 /* must not be called from interrupt context */ 1000 int ohci_restart(struct ohci_hcd *ohci) 1001 { 1002 int temp; 1003 int i; 1004 struct urb_priv *priv; 1005 1006 ohci_init(ohci); 1007 spin_lock_irq(&ohci->lock); 1008 ohci->rh_state = OHCI_RH_HALTED; 1009 1010 /* Recycle any "live" eds/tds (and urbs). */ 1011 if (!list_empty (&ohci->pending)) 1012 ohci_dbg(ohci, "abort schedule...\n"); 1013 list_for_each_entry (priv, &ohci->pending, pending) { 1014 struct urb *urb = priv->td[0]->urb; 1015 struct ed *ed = priv->ed; 1016 1017 switch (ed->state) { 1018 case ED_OPER: 1019 ed->state = ED_UNLINK; 1020 ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE); 1021 ed_deschedule (ohci, ed); 1022 1023 ed->ed_next = ohci->ed_rm_list; 1024 ed->ed_prev = NULL; 1025 ohci->ed_rm_list = ed; 1026 /* FALLTHROUGH */ 1027 case ED_UNLINK: 1028 break; 1029 default: 1030 ohci_dbg(ohci, "bogus ed %p state %d\n", 1031 ed, ed->state); 1032 } 1033 1034 if (!urb->unlinked) 1035 urb->unlinked = -ESHUTDOWN; 1036 } 1037 ohci_work(ohci); 1038 spin_unlock_irq(&ohci->lock); 1039 1040 /* paranoia, in case that didn't work: */ 1041 1042 /* empty the interrupt branches */ 1043 for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0; 1044 for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0; 1045 1046 /* no EDs to remove */ 1047 ohci->ed_rm_list = NULL; 1048 1049 /* empty control and bulk lists */ 1050 ohci->ed_controltail = NULL; 1051 ohci->ed_bulktail = NULL; 1052 1053 if ((temp = ohci_run (ohci)) < 0) { 1054 ohci_err (ohci, "can't restart, %d\n", temp); 1055 return temp; 1056 } 1057 ohci_dbg(ohci, "restart complete\n"); 1058 return 0; 1059 } 1060 EXPORT_SYMBOL_GPL(ohci_restart); 1061 1062 #endif 1063 1064 #ifdef CONFIG_PM 1065 1066 int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup) 1067 { 1068 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 1069 unsigned long flags; 1070 int rc = 0; 1071 1072 /* Disable irq emission and mark HW unaccessible. Use 1073 * the spinlock to properly synchronize with possible pending 1074 * RH suspend or resume activity. 1075 */ 1076 spin_lock_irqsave (&ohci->lock, flags); 1077 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); 1078 (void)ohci_readl(ohci, &ohci->regs->intrdisable); 1079 1080 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 1081 spin_unlock_irqrestore (&ohci->lock, flags); 1082 1083 synchronize_irq(hcd->irq); 1084 1085 if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) { 1086 ohci_resume(hcd, false); 1087 rc = -EBUSY; 1088 } 1089 return rc; 1090 } 1091 EXPORT_SYMBOL_GPL(ohci_suspend); 1092 1093 1094 int ohci_resume(struct usb_hcd *hcd, bool hibernated) 1095 { 1096 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 1097 int port; 1098 bool need_reinit = false; 1099 1100 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 1101 1102 /* Make sure resume from hibernation re-enumerates everything */ 1103 if (hibernated) 1104 ohci_usb_reset(ohci); 1105 1106 /* See if the controller is already running or has been reset */ 1107 ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); 1108 if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { 1109 need_reinit = true; 1110 } else { 1111 switch (ohci->hc_control & OHCI_CTRL_HCFS) { 1112 case OHCI_USB_OPER: 1113 case OHCI_USB_RESET: 1114 need_reinit = true; 1115 } 1116 } 1117 1118 /* If needed, reinitialize and suspend the root hub */ 1119 if (need_reinit) { 1120 spin_lock_irq(&ohci->lock); 1121 ohci_rh_resume(ohci); 1122 ohci_rh_suspend(ohci, 0); 1123 spin_unlock_irq(&ohci->lock); 1124 } 1125 1126 /* Normally just turn on port power and enable interrupts */ 1127 else { 1128 ohci_dbg(ohci, "powerup ports\n"); 1129 for (port = 0; port < ohci->num_ports; port++) 1130 ohci_writel(ohci, RH_PS_PPS, 1131 &ohci->regs->roothub.portstatus[port]); 1132 1133 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrenable); 1134 ohci_readl(ohci, &ohci->regs->intrenable); 1135 msleep(20); 1136 } 1137 1138 usb_hcd_resume_root_hub(hcd); 1139 1140 return 0; 1141 } 1142 EXPORT_SYMBOL_GPL(ohci_resume); 1143 1144 #endif 1145 1146 /*-------------------------------------------------------------------------*/ 1147 1148 /* 1149 * Generic structure: This gets copied for platform drivers so that 1150 * individual entries can be overridden as needed. 1151 */ 1152 1153 static const struct hc_driver ohci_hc_driver = { 1154 .description = hcd_name, 1155 .product_desc = "OHCI Host Controller", 1156 .hcd_priv_size = sizeof(struct ohci_hcd), 1157 1158 /* 1159 * generic hardware linkage 1160 */ 1161 .irq = ohci_irq, 1162 .flags = HCD_MEMORY | HCD_USB11, 1163 1164 /* 1165 * basic lifecycle operations 1166 */ 1167 .reset = ohci_setup, 1168 .start = ohci_start, 1169 .stop = ohci_stop, 1170 .shutdown = ohci_shutdown, 1171 1172 /* 1173 * managing i/o requests and associated device resources 1174 */ 1175 .urb_enqueue = ohci_urb_enqueue, 1176 .urb_dequeue = ohci_urb_dequeue, 1177 .endpoint_disable = ohci_endpoint_disable, 1178 1179 /* 1180 * scheduling support 1181 */ 1182 .get_frame_number = ohci_get_frame, 1183 1184 /* 1185 * root hub support 1186 */ 1187 .hub_status_data = ohci_hub_status_data, 1188 .hub_control = ohci_hub_control, 1189 #ifdef CONFIG_PM 1190 .bus_suspend = ohci_bus_suspend, 1191 .bus_resume = ohci_bus_resume, 1192 #endif 1193 .start_port_reset = ohci_start_port_reset, 1194 }; 1195 1196 void ohci_init_driver(struct hc_driver *drv, 1197 const struct ohci_driver_overrides *over) 1198 { 1199 /* Copy the generic table to drv and then apply the overrides */ 1200 *drv = ohci_hc_driver; 1201 1202 if (over) { 1203 drv->product_desc = over->product_desc; 1204 drv->hcd_priv_size += over->extra_priv_size; 1205 if (over->reset) 1206 drv->reset = over->reset; 1207 } 1208 } 1209 EXPORT_SYMBOL_GPL(ohci_init_driver); 1210 1211 /*-------------------------------------------------------------------------*/ 1212 1213 MODULE_AUTHOR (DRIVER_AUTHOR); 1214 MODULE_DESCRIPTION(DRIVER_DESC); 1215 MODULE_LICENSE ("GPL"); 1216 1217 #if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111) 1218 #include "ohci-sa1111.c" 1219 #define SA1111_DRIVER ohci_hcd_sa1111_driver 1220 #endif 1221 1222 #ifdef CONFIG_USB_OHCI_HCD_DAVINCI 1223 #include "ohci-da8xx.c" 1224 #define DAVINCI_PLATFORM_DRIVER ohci_hcd_da8xx_driver 1225 #endif 1226 1227 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF 1228 #include "ohci-ppc-of.c" 1229 #define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver 1230 #endif 1231 1232 #ifdef CONFIG_PPC_PS3 1233 #include "ohci-ps3.c" 1234 #define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver 1235 #endif 1236 1237 #ifdef CONFIG_MFD_SM501 1238 #include "ohci-sm501.c" 1239 #define SM501_OHCI_DRIVER ohci_hcd_sm501_driver 1240 #endif 1241 1242 #ifdef CONFIG_MFD_TC6393XB 1243 #include "ohci-tmio.c" 1244 #define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver 1245 #endif 1246 1247 #ifdef CONFIG_TILE_USB 1248 #include "ohci-tilegx.c" 1249 #define PLATFORM_DRIVER ohci_hcd_tilegx_driver 1250 #endif 1251 1252 static int __init ohci_hcd_mod_init(void) 1253 { 1254 int retval = 0; 1255 1256 if (usb_disabled()) 1257 return -ENODEV; 1258 1259 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name); 1260 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name, 1261 sizeof (struct ed), sizeof (struct td)); 1262 set_bit(USB_OHCI_LOADED, &usb_hcds_loaded); 1263 1264 ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root); 1265 if (!ohci_debug_root) { 1266 retval = -ENOENT; 1267 goto error_debug; 1268 } 1269 1270 #ifdef PS3_SYSTEM_BUS_DRIVER 1271 retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER); 1272 if (retval < 0) 1273 goto error_ps3; 1274 #endif 1275 1276 #ifdef PLATFORM_DRIVER 1277 retval = platform_driver_register(&PLATFORM_DRIVER); 1278 if (retval < 0) 1279 goto error_platform; 1280 #endif 1281 1282 #ifdef OF_PLATFORM_DRIVER 1283 retval = platform_driver_register(&OF_PLATFORM_DRIVER); 1284 if (retval < 0) 1285 goto error_of_platform; 1286 #endif 1287 1288 #ifdef SA1111_DRIVER 1289 retval = sa1111_driver_register(&SA1111_DRIVER); 1290 if (retval < 0) 1291 goto error_sa1111; 1292 #endif 1293 1294 #ifdef SM501_OHCI_DRIVER 1295 retval = platform_driver_register(&SM501_OHCI_DRIVER); 1296 if (retval < 0) 1297 goto error_sm501; 1298 #endif 1299 1300 #ifdef TMIO_OHCI_DRIVER 1301 retval = platform_driver_register(&TMIO_OHCI_DRIVER); 1302 if (retval < 0) 1303 goto error_tmio; 1304 #endif 1305 1306 #ifdef DAVINCI_PLATFORM_DRIVER 1307 retval = platform_driver_register(&DAVINCI_PLATFORM_DRIVER); 1308 if (retval < 0) 1309 goto error_davinci; 1310 #endif 1311 1312 return retval; 1313 1314 /* Error path */ 1315 #ifdef DAVINCI_PLATFORM_DRIVER 1316 platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER); 1317 error_davinci: 1318 #endif 1319 #ifdef TMIO_OHCI_DRIVER 1320 platform_driver_unregister(&TMIO_OHCI_DRIVER); 1321 error_tmio: 1322 #endif 1323 #ifdef SM501_OHCI_DRIVER 1324 platform_driver_unregister(&SM501_OHCI_DRIVER); 1325 error_sm501: 1326 #endif 1327 #ifdef SA1111_DRIVER 1328 sa1111_driver_unregister(&SA1111_DRIVER); 1329 error_sa1111: 1330 #endif 1331 #ifdef OF_PLATFORM_DRIVER 1332 platform_driver_unregister(&OF_PLATFORM_DRIVER); 1333 error_of_platform: 1334 #endif 1335 #ifdef PLATFORM_DRIVER 1336 platform_driver_unregister(&PLATFORM_DRIVER); 1337 error_platform: 1338 #endif 1339 #ifdef PS3_SYSTEM_BUS_DRIVER 1340 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); 1341 error_ps3: 1342 #endif 1343 debugfs_remove(ohci_debug_root); 1344 ohci_debug_root = NULL; 1345 error_debug: 1346 1347 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded); 1348 return retval; 1349 } 1350 module_init(ohci_hcd_mod_init); 1351 1352 static void __exit ohci_hcd_mod_exit(void) 1353 { 1354 #ifdef DAVINCI_PLATFORM_DRIVER 1355 platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER); 1356 #endif 1357 #ifdef TMIO_OHCI_DRIVER 1358 platform_driver_unregister(&TMIO_OHCI_DRIVER); 1359 #endif 1360 #ifdef SM501_OHCI_DRIVER 1361 platform_driver_unregister(&SM501_OHCI_DRIVER); 1362 #endif 1363 #ifdef SA1111_DRIVER 1364 sa1111_driver_unregister(&SA1111_DRIVER); 1365 #endif 1366 #ifdef OF_PLATFORM_DRIVER 1367 platform_driver_unregister(&OF_PLATFORM_DRIVER); 1368 #endif 1369 #ifdef PLATFORM_DRIVER 1370 platform_driver_unregister(&PLATFORM_DRIVER); 1371 #endif 1372 #ifdef PS3_SYSTEM_BUS_DRIVER 1373 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); 1374 #endif 1375 debugfs_remove(ohci_debug_root); 1376 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded); 1377 } 1378 module_exit(ohci_hcd_mod_exit); 1379 1380