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/system.h>
46 #include <asm/unaligned.h>
47 #include <asm/byteorder.h>
48
49
50 #define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
51 #define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
52
53 /*-------------------------------------------------------------------------*/
54
55 #undef OHCI_VERBOSE_DEBUG /* not always helpful */
56
57 /* For initializing controller (mask in an HCFS mode too) */
58 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
59 #define OHCI_INTR_INIT \
60 (OHCI_INTR_MIE | OHCI_INTR_RHSC | OHCI_INTR_UE \
61 | OHCI_INTR_RD | OHCI_INTR_WDH)
62
63 #ifdef __hppa__
64 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
65 #define IR_DISABLE
66 #endif
67
68 #ifdef CONFIG_ARCH_OMAP
69 /* OMAP doesn't support IR (no SMM; not needed) */
70 #define IR_DISABLE
71 #endif
72
73 /*-------------------------------------------------------------------------*/
74
75 static const char hcd_name [] = "ohci_hcd";
76
77 #define STATECHANGE_DELAY msecs_to_jiffies(300)
78
79 #include "ohci.h"
80 #include "pci-quirks.h"
81
82 static void ohci_dump (struct ohci_hcd *ohci, int verbose);
83 static int ohci_init (struct ohci_hcd *ohci);
84 static void ohci_stop (struct usb_hcd *hcd);
85
86 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
87 static int ohci_restart (struct ohci_hcd *ohci);
88 #endif
89
90 #ifdef CONFIG_PCI
91 static void sb800_prefetch(struct ohci_hcd *ohci, int on);
92 #else
sb800_prefetch(struct ohci_hcd * ohci,int on)93 static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
94 {
95 return;
96 }
97 #endif
98
99
100 #include "ohci-hub.c"
101 #include "ohci-dbg.c"
102 #include "ohci-mem.c"
103 #include "ohci-q.c"
104
105
106 /*
107 * On architectures with edge-triggered interrupts we must never return
108 * IRQ_NONE.
109 */
110 #if defined(CONFIG_SA1111) /* ... or other edge-triggered systems */
111 #define IRQ_NOTMINE IRQ_HANDLED
112 #else
113 #define IRQ_NOTMINE IRQ_NONE
114 #endif
115
116
117 /* Some boards misreport power switching/overcurrent */
118 static bool distrust_firmware = 1;
119 module_param (distrust_firmware, bool, 0);
120 MODULE_PARM_DESC (distrust_firmware,
121 "true to distrust firmware power/overcurrent setup");
122
123 /* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */
124 static bool no_handshake = 0;
125 module_param (no_handshake, bool, 0);
126 MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
127
128 /*-------------------------------------------------------------------------*/
129
130 /*
131 * queue up an urb for anything except the root hub
132 */
ohci_urb_enqueue(struct usb_hcd * hcd,struct urb * urb,gfp_t mem_flags)133 static int ohci_urb_enqueue (
134 struct usb_hcd *hcd,
135 struct urb *urb,
136 gfp_t mem_flags
137 ) {
138 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
139 struct ed *ed;
140 urb_priv_t *urb_priv;
141 unsigned int pipe = urb->pipe;
142 int i, size = 0;
143 unsigned long flags;
144 int retval = 0;
145
146 #ifdef OHCI_VERBOSE_DEBUG
147 urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
148 #endif
149
150 /* every endpoint has a ed, locate and maybe (re)initialize it */
151 if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
152 return -ENOMEM;
153
154 /* for the private part of the URB we need the number of TDs (size) */
155 switch (ed->type) {
156 case PIPE_CONTROL:
157 /* td_submit_urb() doesn't yet handle these */
158 if (urb->transfer_buffer_length > 4096)
159 return -EMSGSIZE;
160
161 /* 1 TD for setup, 1 for ACK, plus ... */
162 size = 2;
163 /* FALLTHROUGH */
164 // case PIPE_INTERRUPT:
165 // case PIPE_BULK:
166 default:
167 /* one TD for every 4096 Bytes (can be up to 8K) */
168 size += urb->transfer_buffer_length / 4096;
169 /* ... and for any remaining bytes ... */
170 if ((urb->transfer_buffer_length % 4096) != 0)
171 size++;
172 /* ... and maybe a zero length packet to wrap it up */
173 if (size == 0)
174 size++;
175 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
176 && (urb->transfer_buffer_length
177 % usb_maxpacket (urb->dev, pipe,
178 usb_pipeout (pipe))) == 0)
179 size++;
180 break;
181 case PIPE_ISOCHRONOUS: /* number of packets from URB */
182 size = urb->number_of_packets;
183 break;
184 }
185
186 /* allocate the private part of the URB */
187 urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
188 mem_flags);
189 if (!urb_priv)
190 return -ENOMEM;
191 INIT_LIST_HEAD (&urb_priv->pending);
192 urb_priv->length = size;
193 urb_priv->ed = ed;
194
195 /* allocate the TDs (deferring hash chain updates) */
196 for (i = 0; i < size; i++) {
197 urb_priv->td [i] = td_alloc (ohci, mem_flags);
198 if (!urb_priv->td [i]) {
199 urb_priv->length = i;
200 urb_free_priv (ohci, urb_priv);
201 return -ENOMEM;
202 }
203 }
204
205 spin_lock_irqsave (&ohci->lock, flags);
206
207 /* don't submit to a dead HC */
208 if (!HCD_HW_ACCESSIBLE(hcd)) {
209 retval = -ENODEV;
210 goto fail;
211 }
212 if (ohci->rh_state != OHCI_RH_RUNNING) {
213 retval = -ENODEV;
214 goto fail;
215 }
216 retval = usb_hcd_link_urb_to_ep(hcd, urb);
217 if (retval)
218 goto fail;
219
220 /* schedule the ed if needed */
221 if (ed->state == ED_IDLE) {
222 retval = ed_schedule (ohci, ed);
223 if (retval < 0) {
224 usb_hcd_unlink_urb_from_ep(hcd, urb);
225 goto fail;
226 }
227 if (ed->type == PIPE_ISOCHRONOUS) {
228 u16 frame = ohci_frame_no(ohci);
229
230 /* delay a few frames before the first TD */
231 frame += max_t (u16, 8, ed->interval);
232 frame &= ~(ed->interval - 1);
233 frame |= ed->branch;
234 urb->start_frame = frame;
235
236 /* yes, only URB_ISO_ASAP is supported, and
237 * urb->start_frame is never used as input.
238 */
239 }
240 } else if (ed->type == PIPE_ISOCHRONOUS)
241 urb->start_frame = ed->last_iso + ed->interval;
242
243 /* fill the TDs and link them to the ed; and
244 * enable that part of the schedule, if needed
245 * and update count of queued periodic urbs
246 */
247 urb->hcpriv = urb_priv;
248 td_submit_urb (ohci, urb);
249
250 fail:
251 if (retval)
252 urb_free_priv (ohci, urb_priv);
253 spin_unlock_irqrestore (&ohci->lock, flags);
254 return retval;
255 }
256
257 /*
258 * decouple the URB from the HC queues (TDs, urb_priv).
259 * reporting is always done
260 * asynchronously, and we might be dealing with an urb that's
261 * partially transferred, or an ED with other urbs being unlinked.
262 */
ohci_urb_dequeue(struct usb_hcd * hcd,struct urb * urb,int status)263 static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
264 {
265 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
266 unsigned long flags;
267 int rc;
268
269 #ifdef OHCI_VERBOSE_DEBUG
270 urb_print(urb, "UNLINK", 1, status);
271 #endif
272
273 spin_lock_irqsave (&ohci->lock, flags);
274 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
275 if (rc) {
276 ; /* Do nothing */
277 } else if (ohci->rh_state == OHCI_RH_RUNNING) {
278 urb_priv_t *urb_priv;
279
280 /* Unless an IRQ completed the unlink while it was being
281 * handed to us, flag it for unlink and giveback, and force
282 * some upcoming INTR_SF to call finish_unlinks()
283 */
284 urb_priv = urb->hcpriv;
285 if (urb_priv) {
286 if (urb_priv->ed->state == ED_OPER)
287 start_ed_unlink (ohci, urb_priv->ed);
288 }
289 } else {
290 /*
291 * with HC dead, we won't respect hc queue pointers
292 * any more ... just clean up every urb's memory.
293 */
294 if (urb->hcpriv)
295 finish_urb(ohci, urb, status);
296 }
297 spin_unlock_irqrestore (&ohci->lock, flags);
298 return rc;
299 }
300
301 /*-------------------------------------------------------------------------*/
302
303 /* frees config/altsetting state for endpoints,
304 * including ED memory, dummy TD, and bulk/intr data toggle
305 */
306
307 static void
ohci_endpoint_disable(struct usb_hcd * hcd,struct usb_host_endpoint * ep)308 ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
309 {
310 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
311 unsigned long flags;
312 struct ed *ed = ep->hcpriv;
313 unsigned limit = 1000;
314
315 /* ASSERT: any requests/urbs are being unlinked */
316 /* ASSERT: nobody can be submitting urbs for this any more */
317
318 if (!ed)
319 return;
320
321 rescan:
322 spin_lock_irqsave (&ohci->lock, flags);
323
324 if (ohci->rh_state != OHCI_RH_RUNNING) {
325 sanitize:
326 ed->state = ED_IDLE;
327 if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
328 ohci->eds_scheduled--;
329 finish_unlinks (ohci, 0);
330 }
331
332 switch (ed->state) {
333 case ED_UNLINK: /* wait for hw to finish? */
334 /* major IRQ delivery trouble loses INTR_SF too... */
335 if (limit-- == 0) {
336 ohci_warn(ohci, "ED unlink timeout\n");
337 if (quirk_zfmicro(ohci)) {
338 ohci_warn(ohci, "Attempting ZF TD recovery\n");
339 ohci->ed_to_check = ed;
340 ohci->zf_delay = 2;
341 }
342 goto sanitize;
343 }
344 spin_unlock_irqrestore (&ohci->lock, flags);
345 schedule_timeout_uninterruptible(1);
346 goto rescan;
347 case ED_IDLE: /* fully unlinked */
348 if (list_empty (&ed->td_list)) {
349 td_free (ohci, ed->dummy);
350 ed_free (ohci, ed);
351 break;
352 }
353 /* else FALL THROUGH */
354 default:
355 /* caller was supposed to have unlinked any requests;
356 * that's not our job. can't recover; must leak ed.
357 */
358 ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
359 ed, ep->desc.bEndpointAddress, ed->state,
360 list_empty (&ed->td_list) ? "" : " (has tds)");
361 td_free (ohci, ed->dummy);
362 break;
363 }
364 ep->hcpriv = NULL;
365 spin_unlock_irqrestore (&ohci->lock, flags);
366 }
367
ohci_get_frame(struct usb_hcd * hcd)368 static int ohci_get_frame (struct usb_hcd *hcd)
369 {
370 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
371
372 return ohci_frame_no(ohci);
373 }
374
ohci_usb_reset(struct ohci_hcd * ohci)375 static void ohci_usb_reset (struct ohci_hcd *ohci)
376 {
377 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
378 ohci->hc_control &= OHCI_CTRL_RWC;
379 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
380 ohci->rh_state = OHCI_RH_HALTED;
381 }
382
383 /* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
384 * other cases where the next software may expect clean state from the
385 * "firmware". this is bus-neutral, unlike shutdown() methods.
386 */
387 static void
ohci_shutdown(struct usb_hcd * hcd)388 ohci_shutdown (struct usb_hcd *hcd)
389 {
390 struct ohci_hcd *ohci;
391
392 ohci = hcd_to_ohci (hcd);
393 ohci_writel(ohci, (u32) ~0, &ohci->regs->intrdisable);
394
395 /* Software reset, after which the controller goes into SUSPEND */
396 ohci_writel(ohci, OHCI_HCR, &ohci->regs->cmdstatus);
397 ohci_readl(ohci, &ohci->regs->cmdstatus); /* flush the writes */
398 udelay(10);
399
400 ohci_writel(ohci, ohci->fminterval, &ohci->regs->fminterval);
401 }
402
check_ed(struct ohci_hcd * ohci,struct ed * ed)403 static int check_ed(struct ohci_hcd *ohci, struct ed *ed)
404 {
405 return (hc32_to_cpu(ohci, ed->hwINFO) & ED_IN) != 0
406 && (hc32_to_cpu(ohci, ed->hwHeadP) & TD_MASK)
407 == (hc32_to_cpu(ohci, ed->hwTailP) & TD_MASK)
408 && !list_empty(&ed->td_list);
409 }
410
411 /* ZF Micro watchdog timer callback. The ZF Micro chipset sometimes completes
412 * an interrupt TD but neglects to add it to the donelist. On systems with
413 * this chipset, we need to periodically check the state of the queues to look
414 * for such "lost" TDs.
415 */
unlink_watchdog_func(unsigned long _ohci)416 static void unlink_watchdog_func(unsigned long _ohci)
417 {
418 unsigned long flags;
419 unsigned max;
420 unsigned seen_count = 0;
421 unsigned i;
422 struct ed **seen = NULL;
423 struct ohci_hcd *ohci = (struct ohci_hcd *) _ohci;
424
425 spin_lock_irqsave(&ohci->lock, flags);
426 max = ohci->eds_scheduled;
427 if (!max)
428 goto done;
429
430 if (ohci->ed_to_check)
431 goto out;
432
433 seen = kcalloc(max, sizeof *seen, GFP_ATOMIC);
434 if (!seen)
435 goto out;
436
437 for (i = 0; i < NUM_INTS; i++) {
438 struct ed *ed = ohci->periodic[i];
439
440 while (ed) {
441 unsigned temp;
442
443 /* scan this branch of the periodic schedule tree */
444 for (temp = 0; temp < seen_count; temp++) {
445 if (seen[temp] == ed) {
446 /* we've checked it and what's after */
447 ed = NULL;
448 break;
449 }
450 }
451 if (!ed)
452 break;
453 seen[seen_count++] = ed;
454 if (!check_ed(ohci, ed)) {
455 ed = ed->ed_next;
456 continue;
457 }
458
459 /* HC's TD list is empty, but HCD sees at least one
460 * TD that's not been sent through the donelist.
461 */
462 ohci->ed_to_check = ed;
463 ohci->zf_delay = 2;
464
465 /* The HC may wait until the next frame to report the
466 * TD as done through the donelist and INTR_WDH. (We
467 * just *assume* it's not a multi-TD interrupt URB;
468 * those could defer the IRQ more than one frame, using
469 * DI...) Check again after the next INTR_SF.
470 */
471 ohci_writel(ohci, OHCI_INTR_SF,
472 &ohci->regs->intrstatus);
473 ohci_writel(ohci, OHCI_INTR_SF,
474 &ohci->regs->intrenable);
475
476 /* flush those writes */
477 (void) ohci_readl(ohci, &ohci->regs->control);
478
479 goto out;
480 }
481 }
482 out:
483 kfree(seen);
484 if (ohci->eds_scheduled)
485 mod_timer(&ohci->unlink_watchdog, round_jiffies(jiffies + HZ));
486 done:
487 spin_unlock_irqrestore(&ohci->lock, flags);
488 }
489
490 /*-------------------------------------------------------------------------*
491 * HC functions
492 *-------------------------------------------------------------------------*/
493
494 /* init memory, and kick BIOS/SMM off */
495
ohci_init(struct ohci_hcd * ohci)496 static int ohci_init (struct ohci_hcd *ohci)
497 {
498 int ret;
499 struct usb_hcd *hcd = ohci_to_hcd(ohci);
500
501 if (distrust_firmware)
502 ohci->flags |= OHCI_QUIRK_HUB_POWER;
503
504 ohci->rh_state = OHCI_RH_HALTED;
505 ohci->regs = hcd->regs;
506
507 /* REVISIT this BIOS handshake is now moved into PCI "quirks", and
508 * was never needed for most non-PCI systems ... remove the code?
509 */
510
511 #ifndef IR_DISABLE
512 /* SMM owns the HC? not for long! */
513 if (!no_handshake && ohci_readl (ohci,
514 &ohci->regs->control) & OHCI_CTRL_IR) {
515 u32 temp;
516
517 ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n");
518
519 /* this timeout is arbitrary. we make it long, so systems
520 * depending on usb keyboards may be usable even if the
521 * BIOS/SMM code seems pretty broken.
522 */
523 temp = 500; /* arbitrary: five seconds */
524
525 ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable);
526 ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus);
527 while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) {
528 msleep (10);
529 if (--temp == 0) {
530 ohci_err (ohci, "USB HC takeover failed!"
531 " (BIOS/SMM bug)\n");
532 return -EBUSY;
533 }
534 }
535 ohci_usb_reset (ohci);
536 }
537 #endif
538
539 /* Disable HC interrupts */
540 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
541
542 /* flush the writes, and save key bits like RWC */
543 if (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_RWC)
544 ohci->hc_control |= OHCI_CTRL_RWC;
545
546 /* Read the number of ports unless overridden */
547 if (ohci->num_ports == 0)
548 ohci->num_ports = roothub_a(ohci) & RH_A_NDP;
549
550 if (ohci->hcca)
551 return 0;
552
553 ohci->hcca = dma_alloc_coherent (hcd->self.controller,
554 sizeof *ohci->hcca, &ohci->hcca_dma, 0);
555 if (!ohci->hcca)
556 return -ENOMEM;
557
558 if ((ret = ohci_mem_init (ohci)) < 0)
559 ohci_stop (hcd);
560 else {
561 create_debug_files (ohci);
562 }
563
564 return ret;
565 }
566
567 /*-------------------------------------------------------------------------*/
568
569 /* Start an OHCI controller, set the BUS operational
570 * resets USB and controller
571 * enable interrupts
572 */
ohci_run(struct ohci_hcd * ohci)573 static int ohci_run (struct ohci_hcd *ohci)
574 {
575 u32 mask, val;
576 int first = ohci->fminterval == 0;
577 struct usb_hcd *hcd = ohci_to_hcd(ohci);
578
579 ohci->rh_state = OHCI_RH_HALTED;
580
581 /* boot firmware should have set this up (5.1.1.3.1) */
582 if (first) {
583
584 val = ohci_readl (ohci, &ohci->regs->fminterval);
585 ohci->fminterval = val & 0x3fff;
586 if (ohci->fminterval != FI)
587 ohci_dbg (ohci, "fminterval delta %d\n",
588 ohci->fminterval - FI);
589 ohci->fminterval |= FSMP (ohci->fminterval) << 16;
590 /* also: power/overcurrent flags in roothub.a */
591 }
592
593 /* Reset USB nearly "by the book". RemoteWakeupConnected has
594 * to be checked in case boot firmware (BIOS/SMM/...) has set up
595 * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM).
596 * If the bus glue detected wakeup capability then it should
597 * already be enabled; if so we'll just enable it again.
598 */
599 if ((ohci->hc_control & OHCI_CTRL_RWC) != 0)
600 device_set_wakeup_capable(hcd->self.controller, 1);
601
602 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
603 case OHCI_USB_OPER:
604 val = 0;
605 break;
606 case OHCI_USB_SUSPEND:
607 case OHCI_USB_RESUME:
608 ohci->hc_control &= OHCI_CTRL_RWC;
609 ohci->hc_control |= OHCI_USB_RESUME;
610 val = 10 /* msec wait */;
611 break;
612 // case OHCI_USB_RESET:
613 default:
614 ohci->hc_control &= OHCI_CTRL_RWC;
615 ohci->hc_control |= OHCI_USB_RESET;
616 val = 50 /* msec wait */;
617 break;
618 }
619 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
620 // flush the writes
621 (void) ohci_readl (ohci, &ohci->regs->control);
622 msleep(val);
623
624 memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
625
626 /* 2msec timelimit here means no irqs/preempt */
627 spin_lock_irq (&ohci->lock);
628
629 retry:
630 /* HC Reset requires max 10 us delay */
631 ohci_writel (ohci, OHCI_HCR, &ohci->regs->cmdstatus);
632 val = 30; /* ... allow extra time */
633 while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
634 if (--val == 0) {
635 spin_unlock_irq (&ohci->lock);
636 ohci_err (ohci, "USB HC reset timed out!\n");
637 return -1;
638 }
639 udelay (1);
640 }
641
642 /* now we're in the SUSPEND state ... must go OPERATIONAL
643 * within 2msec else HC enters RESUME
644 *
645 * ... but some hardware won't init fmInterval "by the book"
646 * (SiS, OPTi ...), so reset again instead. SiS doesn't need
647 * this if we write fmInterval after we're OPERATIONAL.
648 * Unclear about ALi, ServerWorks, and others ... this could
649 * easily be a longstanding bug in chip init on Linux.
650 */
651 if (ohci->flags & OHCI_QUIRK_INITRESET) {
652 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
653 // flush those writes
654 (void) ohci_readl (ohci, &ohci->regs->control);
655 }
656
657 /* Tell the controller where the control and bulk lists are
658 * The lists are empty now. */
659 ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
660 ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
661
662 /* a reset clears this */
663 ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
664
665 periodic_reinit (ohci);
666
667 /* some OHCI implementations are finicky about how they init.
668 * bogus values here mean not even enumeration could work.
669 */
670 if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
671 || !ohci_readl (ohci, &ohci->regs->periodicstart)) {
672 if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
673 ohci->flags |= OHCI_QUIRK_INITRESET;
674 ohci_dbg (ohci, "enabling initreset quirk\n");
675 goto retry;
676 }
677 spin_unlock_irq (&ohci->lock);
678 ohci_err (ohci, "init err (%08x %04x)\n",
679 ohci_readl (ohci, &ohci->regs->fminterval),
680 ohci_readl (ohci, &ohci->regs->periodicstart));
681 return -EOVERFLOW;
682 }
683
684 /* use rhsc irqs after khubd is fully initialized */
685 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
686 hcd->uses_new_polling = 1;
687
688 /* start controller operations */
689 ohci->hc_control &= OHCI_CTRL_RWC;
690 ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
691 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
692 ohci->rh_state = OHCI_RH_RUNNING;
693
694 /* wake on ConnectStatusChange, matching external hubs */
695 ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
696
697 /* Choose the interrupts we care about now, others later on demand */
698 mask = OHCI_INTR_INIT;
699 ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
700 ohci_writel (ohci, mask, &ohci->regs->intrenable);
701
702 /* handle root hub init quirks ... */
703 val = roothub_a (ohci);
704 val &= ~(RH_A_PSM | RH_A_OCPM);
705 if (ohci->flags & OHCI_QUIRK_SUPERIO) {
706 /* NSC 87560 and maybe others */
707 val |= RH_A_NOCP;
708 val &= ~(RH_A_POTPGT | RH_A_NPS);
709 ohci_writel (ohci, val, &ohci->regs->roothub.a);
710 } else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
711 (ohci->flags & OHCI_QUIRK_HUB_POWER)) {
712 /* hub power always on; required for AMD-756 and some
713 * Mac platforms. ganged overcurrent reporting, if any.
714 */
715 val |= RH_A_NPS;
716 ohci_writel (ohci, val, &ohci->regs->roothub.a);
717 }
718 ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
719 ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
720 &ohci->regs->roothub.b);
721 // flush those writes
722 (void) ohci_readl (ohci, &ohci->regs->control);
723
724 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
725 spin_unlock_irq (&ohci->lock);
726
727 // POTPGT delay is bits 24-31, in 2 ms units.
728 mdelay ((val >> 23) & 0x1fe);
729
730 if (quirk_zfmicro(ohci)) {
731 /* Create timer to watch for bad queue state on ZF Micro */
732 setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
733 (unsigned long) ohci);
734
735 ohci->eds_scheduled = 0;
736 ohci->ed_to_check = NULL;
737 }
738
739 ohci_dump (ohci, 1);
740
741 return 0;
742 }
743
744 /*-------------------------------------------------------------------------*/
745
746 /* an interrupt happens */
747
ohci_irq(struct usb_hcd * hcd)748 static irqreturn_t ohci_irq (struct usb_hcd *hcd)
749 {
750 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
751 struct ohci_regs __iomem *regs = ohci->regs;
752 int ints;
753
754 /* Read interrupt status (and flush pending writes). We ignore the
755 * optimization of checking the LSB of hcca->done_head; it doesn't
756 * work on all systems (edge triggering for OHCI can be a factor).
757 */
758 ints = ohci_readl(ohci, ®s->intrstatus);
759
760 /* Check for an all 1's result which is a typical consequence
761 * of dead, unclocked, or unplugged (CardBus...) devices
762 */
763 if (ints == ~(u32)0) {
764 ohci->rh_state = OHCI_RH_HALTED;
765 ohci_dbg (ohci, "device removed!\n");
766 usb_hc_died(hcd);
767 return IRQ_HANDLED;
768 }
769
770 /* We only care about interrupts that are enabled */
771 ints &= ohci_readl(ohci, ®s->intrenable);
772
773 /* interrupt for some other device? */
774 if (ints == 0 || unlikely(ohci->rh_state == OHCI_RH_HALTED))
775 return IRQ_NOTMINE;
776
777 if (ints & OHCI_INTR_UE) {
778 // e.g. due to PCI Master/Target Abort
779 if (quirk_nec(ohci)) {
780 /* Workaround for a silicon bug in some NEC chips used
781 * in Apple's PowerBooks. Adapted from Darwin code.
782 */
783 ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
784
785 ohci_writel (ohci, OHCI_INTR_UE, ®s->intrdisable);
786
787 schedule_work (&ohci->nec_work);
788 } else {
789 ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
790 ohci->rh_state = OHCI_RH_HALTED;
791 usb_hc_died(hcd);
792 }
793
794 ohci_dump (ohci, 1);
795 ohci_usb_reset (ohci);
796 }
797
798 if (ints & OHCI_INTR_RHSC) {
799 ohci_vdbg(ohci, "rhsc\n");
800 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
801 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
802 ®s->intrstatus);
803
804 /* NOTE: Vendors didn't always make the same implementation
805 * choices for RHSC. Many followed the spec; RHSC triggers
806 * on an edge, like setting and maybe clearing a port status
807 * change bit. With others it's level-triggered, active
808 * until khubd clears all the port status change bits. We'll
809 * always disable it here and rely on polling until khubd
810 * re-enables it.
811 */
812 ohci_writel(ohci, OHCI_INTR_RHSC, ®s->intrdisable);
813 usb_hcd_poll_rh_status(hcd);
814 }
815
816 /* For connect and disconnect events, we expect the controller
817 * to turn on RHSC along with RD. But for remote wakeup events
818 * this might not happen.
819 */
820 else if (ints & OHCI_INTR_RD) {
821 ohci_vdbg(ohci, "resume detect\n");
822 ohci_writel(ohci, OHCI_INTR_RD, ®s->intrstatus);
823 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
824 if (ohci->autostop) {
825 spin_lock (&ohci->lock);
826 ohci_rh_resume (ohci);
827 spin_unlock (&ohci->lock);
828 } else
829 usb_hcd_resume_root_hub(hcd);
830 }
831
832 if (ints & OHCI_INTR_WDH) {
833 spin_lock (&ohci->lock);
834 dl_done_list (ohci);
835 spin_unlock (&ohci->lock);
836 }
837
838 if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
839 spin_lock(&ohci->lock);
840 if (ohci->ed_to_check) {
841 struct ed *ed = ohci->ed_to_check;
842
843 if (check_ed(ohci, ed)) {
844 /* HC thinks the TD list is empty; HCD knows
845 * at least one TD is outstanding
846 */
847 if (--ohci->zf_delay == 0) {
848 struct td *td = list_entry(
849 ed->td_list.next,
850 struct td, td_list);
851 ohci_warn(ohci,
852 "Reclaiming orphan TD %p\n",
853 td);
854 takeback_td(ohci, td);
855 ohci->ed_to_check = NULL;
856 }
857 } else
858 ohci->ed_to_check = NULL;
859 }
860 spin_unlock(&ohci->lock);
861 }
862
863 /* could track INTR_SO to reduce available PCI/... bandwidth */
864
865 /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
866 * when there's still unlinking to be done (next frame).
867 */
868 spin_lock (&ohci->lock);
869 if (ohci->ed_rm_list)
870 finish_unlinks (ohci, ohci_frame_no(ohci));
871 if ((ints & OHCI_INTR_SF) != 0
872 && !ohci->ed_rm_list
873 && !ohci->ed_to_check
874 && ohci->rh_state == OHCI_RH_RUNNING)
875 ohci_writel (ohci, OHCI_INTR_SF, ®s->intrdisable);
876 spin_unlock (&ohci->lock);
877
878 if (ohci->rh_state == OHCI_RH_RUNNING) {
879 ohci_writel (ohci, ints, ®s->intrstatus);
880 ohci_writel (ohci, OHCI_INTR_MIE, ®s->intrenable);
881 // flush those writes
882 (void) ohci_readl (ohci, &ohci->regs->control);
883 }
884
885 return IRQ_HANDLED;
886 }
887
888 /*-------------------------------------------------------------------------*/
889
ohci_stop(struct usb_hcd * hcd)890 static void ohci_stop (struct usb_hcd *hcd)
891 {
892 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
893
894 ohci_dump (ohci, 1);
895
896 if (quirk_nec(ohci))
897 flush_work_sync(&ohci->nec_work);
898
899 ohci_usb_reset (ohci);
900 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
901 free_irq(hcd->irq, hcd);
902 hcd->irq = -1;
903
904 if (quirk_zfmicro(ohci))
905 del_timer(&ohci->unlink_watchdog);
906 if (quirk_amdiso(ohci))
907 usb_amd_dev_put();
908
909 remove_debug_files (ohci);
910 ohci_mem_cleanup (ohci);
911 if (ohci->hcca) {
912 dma_free_coherent (hcd->self.controller,
913 sizeof *ohci->hcca,
914 ohci->hcca, ohci->hcca_dma);
915 ohci->hcca = NULL;
916 ohci->hcca_dma = 0;
917 }
918 }
919
920 /*-------------------------------------------------------------------------*/
921
922 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
923
924 /* must not be called from interrupt context */
ohci_restart(struct ohci_hcd * ohci)925 static int ohci_restart (struct ohci_hcd *ohci)
926 {
927 int temp;
928 int i;
929 struct urb_priv *priv;
930
931 spin_lock_irq(&ohci->lock);
932 ohci->rh_state = OHCI_RH_HALTED;
933
934 /* Recycle any "live" eds/tds (and urbs). */
935 if (!list_empty (&ohci->pending))
936 ohci_dbg(ohci, "abort schedule...\n");
937 list_for_each_entry (priv, &ohci->pending, pending) {
938 struct urb *urb = priv->td[0]->urb;
939 struct ed *ed = priv->ed;
940
941 switch (ed->state) {
942 case ED_OPER:
943 ed->state = ED_UNLINK;
944 ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
945 ed_deschedule (ohci, ed);
946
947 ed->ed_next = ohci->ed_rm_list;
948 ed->ed_prev = NULL;
949 ohci->ed_rm_list = ed;
950 /* FALLTHROUGH */
951 case ED_UNLINK:
952 break;
953 default:
954 ohci_dbg(ohci, "bogus ed %p state %d\n",
955 ed, ed->state);
956 }
957
958 if (!urb->unlinked)
959 urb->unlinked = -ESHUTDOWN;
960 }
961 finish_unlinks (ohci, 0);
962 spin_unlock_irq(&ohci->lock);
963
964 /* paranoia, in case that didn't work: */
965
966 /* empty the interrupt branches */
967 for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
968 for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
969
970 /* no EDs to remove */
971 ohci->ed_rm_list = NULL;
972
973 /* empty control and bulk lists */
974 ohci->ed_controltail = NULL;
975 ohci->ed_bulktail = NULL;
976
977 if ((temp = ohci_run (ohci)) < 0) {
978 ohci_err (ohci, "can't restart, %d\n", temp);
979 return temp;
980 }
981 ohci_dbg(ohci, "restart complete\n");
982 return 0;
983 }
984
985 #endif
986
987 /*-------------------------------------------------------------------------*/
988
989 MODULE_AUTHOR (DRIVER_AUTHOR);
990 MODULE_DESCRIPTION(DRIVER_DESC);
991 MODULE_LICENSE ("GPL");
992
993 #ifdef CONFIG_PCI
994 #include "ohci-pci.c"
995 #define PCI_DRIVER ohci_pci_driver
996 #endif
997
998 #if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
999 #include "ohci-sa1111.c"
1000 #define SA1111_DRIVER ohci_hcd_sa1111_driver
1001 #endif
1002
1003 #if defined(CONFIG_ARCH_S3C2410) || defined(CONFIG_ARCH_S3C64XX)
1004 #include "ohci-s3c2410.c"
1005 #define PLATFORM_DRIVER ohci_hcd_s3c2410_driver
1006 #endif
1007
1008 #ifdef CONFIG_USB_OHCI_EXYNOS
1009 #include "ohci-exynos.c"
1010 #define PLATFORM_DRIVER exynos_ohci_driver
1011 #endif
1012
1013 #ifdef CONFIG_USB_OHCI_HCD_OMAP1
1014 #include "ohci-omap.c"
1015 #define OMAP1_PLATFORM_DRIVER ohci_hcd_omap_driver
1016 #endif
1017
1018 #ifdef CONFIG_USB_OHCI_HCD_OMAP3
1019 #include "ohci-omap3.c"
1020 #define OMAP3_PLATFORM_DRIVER ohci_hcd_omap3_driver
1021 #endif
1022
1023 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
1024 #include "ohci-pxa27x.c"
1025 #define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
1026 #endif
1027
1028 #ifdef CONFIG_ARCH_EP93XX
1029 #include "ohci-ep93xx.c"
1030 #define PLATFORM_DRIVER ohci_hcd_ep93xx_driver
1031 #endif
1032
1033 #ifdef CONFIG_MIPS_ALCHEMY
1034 #include "ohci-au1xxx.c"
1035 #define PLATFORM_DRIVER ohci_hcd_au1xxx_driver
1036 #endif
1037
1038 #ifdef CONFIG_PNX8550
1039 #include "ohci-pnx8550.c"
1040 #define PLATFORM_DRIVER ohci_hcd_pnx8550_driver
1041 #endif
1042
1043 #ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
1044 #include "ohci-ppc-soc.c"
1045 #define PLATFORM_DRIVER ohci_hcd_ppc_soc_driver
1046 #endif
1047
1048 #ifdef CONFIG_ARCH_AT91
1049 #include "ohci-at91.c"
1050 #define PLATFORM_DRIVER ohci_hcd_at91_driver
1051 #endif
1052
1053 #ifdef CONFIG_ARCH_PNX4008
1054 #include "ohci-pnx4008.c"
1055 #define PLATFORM_DRIVER usb_hcd_pnx4008_driver
1056 #endif
1057
1058 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
1059 #include "ohci-da8xx.c"
1060 #define PLATFORM_DRIVER ohci_hcd_da8xx_driver
1061 #endif
1062
1063 #ifdef CONFIG_USB_OHCI_SH
1064 #include "ohci-sh.c"
1065 #define PLATFORM_DRIVER ohci_hcd_sh_driver
1066 #endif
1067
1068
1069 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF
1070 #include "ohci-ppc-of.c"
1071 #define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
1072 #endif
1073
1074 #ifdef CONFIG_PLAT_SPEAR
1075 #include "ohci-spear.c"
1076 #define PLATFORM_DRIVER spear_ohci_hcd_driver
1077 #endif
1078
1079 #ifdef CONFIG_PPC_PS3
1080 #include "ohci-ps3.c"
1081 #define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
1082 #endif
1083
1084 #ifdef CONFIG_USB_OHCI_HCD_SSB
1085 #include "ohci-ssb.c"
1086 #define SSB_OHCI_DRIVER ssb_ohci_driver
1087 #endif
1088
1089 #ifdef CONFIG_MFD_SM501
1090 #include "ohci-sm501.c"
1091 #define SM501_OHCI_DRIVER ohci_hcd_sm501_driver
1092 #endif
1093
1094 #ifdef CONFIG_MFD_TC6393XB
1095 #include "ohci-tmio.c"
1096 #define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver
1097 #endif
1098
1099 #ifdef CONFIG_MACH_JZ4740
1100 #include "ohci-jz4740.c"
1101 #define PLATFORM_DRIVER ohci_hcd_jz4740_driver
1102 #endif
1103
1104 #ifdef CONFIG_USB_OCTEON_OHCI
1105 #include "ohci-octeon.c"
1106 #define PLATFORM_DRIVER ohci_octeon_driver
1107 #endif
1108
1109 #ifdef CONFIG_USB_CNS3XXX_OHCI
1110 #include "ohci-cns3xxx.c"
1111 #define PLATFORM_DRIVER ohci_hcd_cns3xxx_driver
1112 #endif
1113
1114 #ifdef CONFIG_USB_OHCI_ATH79
1115 #include "ohci-ath79.c"
1116 #define PLATFORM_DRIVER ohci_hcd_ath79_driver
1117 #endif
1118
1119 #ifdef CONFIG_CPU_XLR
1120 #include "ohci-xls.c"
1121 #define PLATFORM_DRIVER ohci_xls_driver
1122 #endif
1123
1124 #if !defined(PCI_DRIVER) && \
1125 !defined(PLATFORM_DRIVER) && \
1126 !defined(OMAP1_PLATFORM_DRIVER) && \
1127 !defined(OMAP3_PLATFORM_DRIVER) && \
1128 !defined(OF_PLATFORM_DRIVER) && \
1129 !defined(SA1111_DRIVER) && \
1130 !defined(PS3_SYSTEM_BUS_DRIVER) && \
1131 !defined(SM501_OHCI_DRIVER) && \
1132 !defined(TMIO_OHCI_DRIVER) && \
1133 !defined(SSB_OHCI_DRIVER)
1134 #error "missing bus glue for ohci-hcd"
1135 #endif
1136
ohci_hcd_mod_init(void)1137 static int __init ohci_hcd_mod_init(void)
1138 {
1139 int retval = 0;
1140
1141 if (usb_disabled())
1142 return -ENODEV;
1143
1144 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1145 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
1146 sizeof (struct ed), sizeof (struct td));
1147 set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1148
1149 #ifdef DEBUG
1150 ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root);
1151 if (!ohci_debug_root) {
1152 retval = -ENOENT;
1153 goto error_debug;
1154 }
1155 #endif
1156
1157 #ifdef PS3_SYSTEM_BUS_DRIVER
1158 retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1159 if (retval < 0)
1160 goto error_ps3;
1161 #endif
1162
1163 #ifdef PLATFORM_DRIVER
1164 retval = platform_driver_register(&PLATFORM_DRIVER);
1165 if (retval < 0)
1166 goto error_platform;
1167 #endif
1168
1169 #ifdef OMAP1_PLATFORM_DRIVER
1170 retval = platform_driver_register(&OMAP1_PLATFORM_DRIVER);
1171 if (retval < 0)
1172 goto error_omap1_platform;
1173 #endif
1174
1175 #ifdef OMAP3_PLATFORM_DRIVER
1176 retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER);
1177 if (retval < 0)
1178 goto error_omap3_platform;
1179 #endif
1180
1181 #ifdef OF_PLATFORM_DRIVER
1182 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
1183 if (retval < 0)
1184 goto error_of_platform;
1185 #endif
1186
1187 #ifdef SA1111_DRIVER
1188 retval = sa1111_driver_register(&SA1111_DRIVER);
1189 if (retval < 0)
1190 goto error_sa1111;
1191 #endif
1192
1193 #ifdef PCI_DRIVER
1194 retval = pci_register_driver(&PCI_DRIVER);
1195 if (retval < 0)
1196 goto error_pci;
1197 #endif
1198
1199 #ifdef SSB_OHCI_DRIVER
1200 retval = ssb_driver_register(&SSB_OHCI_DRIVER);
1201 if (retval)
1202 goto error_ssb;
1203 #endif
1204
1205 #ifdef SM501_OHCI_DRIVER
1206 retval = platform_driver_register(&SM501_OHCI_DRIVER);
1207 if (retval < 0)
1208 goto error_sm501;
1209 #endif
1210
1211 #ifdef TMIO_OHCI_DRIVER
1212 retval = platform_driver_register(&TMIO_OHCI_DRIVER);
1213 if (retval < 0)
1214 goto error_tmio;
1215 #endif
1216
1217 return retval;
1218
1219 /* Error path */
1220 #ifdef TMIO_OHCI_DRIVER
1221 platform_driver_unregister(&TMIO_OHCI_DRIVER);
1222 error_tmio:
1223 #endif
1224 #ifdef SM501_OHCI_DRIVER
1225 platform_driver_unregister(&SM501_OHCI_DRIVER);
1226 error_sm501:
1227 #endif
1228 #ifdef SSB_OHCI_DRIVER
1229 ssb_driver_unregister(&SSB_OHCI_DRIVER);
1230 error_ssb:
1231 #endif
1232 #ifdef PCI_DRIVER
1233 pci_unregister_driver(&PCI_DRIVER);
1234 error_pci:
1235 #endif
1236 #ifdef SA1111_DRIVER
1237 sa1111_driver_unregister(&SA1111_DRIVER);
1238 error_sa1111:
1239 #endif
1240 #ifdef OF_PLATFORM_DRIVER
1241 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1242 error_of_platform:
1243 #endif
1244 #ifdef PLATFORM_DRIVER
1245 platform_driver_unregister(&PLATFORM_DRIVER);
1246 error_platform:
1247 #endif
1248 #ifdef OMAP1_PLATFORM_DRIVER
1249 platform_driver_unregister(&OMAP1_PLATFORM_DRIVER);
1250 error_omap1_platform:
1251 #endif
1252 #ifdef OMAP3_PLATFORM_DRIVER
1253 platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
1254 error_omap3_platform:
1255 #endif
1256 #ifdef PS3_SYSTEM_BUS_DRIVER
1257 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1258 error_ps3:
1259 #endif
1260 #ifdef DEBUG
1261 debugfs_remove(ohci_debug_root);
1262 ohci_debug_root = NULL;
1263 error_debug:
1264 #endif
1265
1266 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1267 return retval;
1268 }
1269 module_init(ohci_hcd_mod_init);
1270
ohci_hcd_mod_exit(void)1271 static void __exit ohci_hcd_mod_exit(void)
1272 {
1273 #ifdef TMIO_OHCI_DRIVER
1274 platform_driver_unregister(&TMIO_OHCI_DRIVER);
1275 #endif
1276 #ifdef SM501_OHCI_DRIVER
1277 platform_driver_unregister(&SM501_OHCI_DRIVER);
1278 #endif
1279 #ifdef SSB_OHCI_DRIVER
1280 ssb_driver_unregister(&SSB_OHCI_DRIVER);
1281 #endif
1282 #ifdef PCI_DRIVER
1283 pci_unregister_driver(&PCI_DRIVER);
1284 #endif
1285 #ifdef SA1111_DRIVER
1286 sa1111_driver_unregister(&SA1111_DRIVER);
1287 #endif
1288 #ifdef OF_PLATFORM_DRIVER
1289 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1290 #endif
1291 #ifdef PLATFORM_DRIVER
1292 platform_driver_unregister(&PLATFORM_DRIVER);
1293 #endif
1294 #ifdef OMAP3_PLATFORM_DRIVER
1295 platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
1296 #endif
1297 #ifdef PS3_SYSTEM_BUS_DRIVER
1298 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1299 #endif
1300 #ifdef DEBUG
1301 debugfs_remove(ohci_debug_root);
1302 #endif
1303 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1304 }
1305 module_exit(ohci_hcd_mod_exit);
1306
1307