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Merge tag 'mfd-3.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
[deliverable/linux.git] / drivers / usb / host / ohci-hcd.c
1 /*
2 * Open Host Controller Interface (OHCI) driver for USB.
3 *
4 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
5 *
6 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
7 * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
8 *
9 * [ Initialisation is based on Linus' ]
10 * [ uhci code and gregs ohci fragments ]
11 * [ (C) Copyright 1999 Linus Torvalds ]
12 * [ (C) Copyright 1999 Gregory P. Smith]
13 *
14 *
15 * OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller
16 * interfaces (though some non-x86 Intel chips use it). It supports
17 * smarter hardware than UHCI. A download link for the spec available
18 * through the http://www.usb.org website.
19 *
20 * This file is licenced under the GPL.
21 */
22
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <linux/pci.h>
26 #include <linux/kernel.h>
27 #include <linux/delay.h>
28 #include <linux/ioport.h>
29 #include <linux/sched.h>
30 #include <linux/slab.h>
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/timer.h>
34 #include <linux/list.h>
35 #include <linux/usb.h>
36 #include <linux/usb/otg.h>
37 #include <linux/usb/hcd.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/dmapool.h>
40 #include <linux/workqueue.h>
41 #include <linux/debugfs.h>
42
43 #include <asm/io.h>
44 #include <asm/irq.h>
45 #include <asm/unaligned.h>
46 #include <asm/byteorder.h>
47
48
49 #define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
50 #define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
51
52 /*-------------------------------------------------------------------------*/
53
54 #undef OHCI_VERBOSE_DEBUG /* not always helpful */
55
56 /* For initializing controller (mask in an HCFS mode too) */
57 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
58 #define OHCI_INTR_INIT \
59 (OHCI_INTR_MIE | OHCI_INTR_RHSC | OHCI_INTR_UE \
60 | OHCI_INTR_RD | OHCI_INTR_WDH)
61
62 #ifdef __hppa__
63 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
64 #define IR_DISABLE
65 #endif
66
67 #ifdef CONFIG_ARCH_OMAP
68 /* OMAP doesn't support IR (no SMM; not needed) */
69 #define IR_DISABLE
70 #endif
71
72 /*-------------------------------------------------------------------------*/
73
74 static const char hcd_name [] = "ohci_hcd";
75
76 #define STATECHANGE_DELAY msecs_to_jiffies(300)
77
78 #include "ohci.h"
79 #include "pci-quirks.h"
80
81 static void ohci_dump (struct ohci_hcd *ohci, int verbose);
82 static int ohci_init (struct ohci_hcd *ohci);
83 static void ohci_stop (struct usb_hcd *hcd);
84
85 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
86 static int ohci_restart (struct ohci_hcd *ohci);
87 #endif
88
89 #ifdef CONFIG_PCI
90 static void sb800_prefetch(struct ohci_hcd *ohci, int on);
91 #else
92 static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
93 {
94 return;
95 }
96 #endif
97
98
99 #include "ohci-hub.c"
100 #include "ohci-dbg.c"
101 #include "ohci-mem.c"
102 #include "ohci-q.c"
103
104
105 /*
106 * On architectures with edge-triggered interrupts we must never return
107 * IRQ_NONE.
108 */
109 #if defined(CONFIG_SA1111) /* ... or other edge-triggered systems */
110 #define IRQ_NOTMINE IRQ_HANDLED
111 #else
112 #define IRQ_NOTMINE IRQ_NONE
113 #endif
114
115
116 /* Some boards misreport power switching/overcurrent */
117 static bool distrust_firmware = 1;
118 module_param (distrust_firmware, bool, 0);
119 MODULE_PARM_DESC (distrust_firmware,
120 "true to distrust firmware power/overcurrent setup");
121
122 /* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */
123 static bool no_handshake = 0;
124 module_param (no_handshake, bool, 0);
125 MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
126
127 /*-------------------------------------------------------------------------*/
128
129 /*
130 * queue up an urb for anything except the root hub
131 */
132 static int ohci_urb_enqueue (
133 struct usb_hcd *hcd,
134 struct urb *urb,
135 gfp_t mem_flags
136 ) {
137 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
138 struct ed *ed;
139 urb_priv_t *urb_priv;
140 unsigned int pipe = urb->pipe;
141 int i, size = 0;
142 unsigned long flags;
143 int retval = 0;
144
145 #ifdef OHCI_VERBOSE_DEBUG
146 urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
147 #endif
148
149 /* every endpoint has a ed, locate and maybe (re)initialize it */
150 if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
151 return -ENOMEM;
152
153 /* for the private part of the URB we need the number of TDs (size) */
154 switch (ed->type) {
155 case PIPE_CONTROL:
156 /* td_submit_urb() doesn't yet handle these */
157 if (urb->transfer_buffer_length > 4096)
158 return -EMSGSIZE;
159
160 /* 1 TD for setup, 1 for ACK, plus ... */
161 size = 2;
162 /* FALLTHROUGH */
163 // case PIPE_INTERRUPT:
164 // case PIPE_BULK:
165 default:
166 /* one TD for every 4096 Bytes (can be up to 8K) */
167 size += urb->transfer_buffer_length / 4096;
168 /* ... and for any remaining bytes ... */
169 if ((urb->transfer_buffer_length % 4096) != 0)
170 size++;
171 /* ... and maybe a zero length packet to wrap it up */
172 if (size == 0)
173 size++;
174 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
175 && (urb->transfer_buffer_length
176 % usb_maxpacket (urb->dev, pipe,
177 usb_pipeout (pipe))) == 0)
178 size++;
179 break;
180 case PIPE_ISOCHRONOUS: /* number of packets from URB */
181 size = urb->number_of_packets;
182 break;
183 }
184
185 /* allocate the private part of the URB */
186 urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
187 mem_flags);
188 if (!urb_priv)
189 return -ENOMEM;
190 INIT_LIST_HEAD (&urb_priv->pending);
191 urb_priv->length = size;
192 urb_priv->ed = ed;
193
194 /* allocate the TDs (deferring hash chain updates) */
195 for (i = 0; i < size; i++) {
196 urb_priv->td [i] = td_alloc (ohci, mem_flags);
197 if (!urb_priv->td [i]) {
198 urb_priv->length = i;
199 urb_free_priv (ohci, urb_priv);
200 return -ENOMEM;
201 }
202 }
203
204 spin_lock_irqsave (&ohci->lock, flags);
205
206 /* don't submit to a dead HC */
207 if (!HCD_HW_ACCESSIBLE(hcd)) {
208 retval = -ENODEV;
209 goto fail;
210 }
211 if (ohci->rh_state != OHCI_RH_RUNNING) {
212 retval = -ENODEV;
213 goto fail;
214 }
215 retval = usb_hcd_link_urb_to_ep(hcd, urb);
216 if (retval)
217 goto fail;
218
219 /* schedule the ed if needed */
220 if (ed->state == ED_IDLE) {
221 retval = ed_schedule (ohci, ed);
222 if (retval < 0) {
223 usb_hcd_unlink_urb_from_ep(hcd, urb);
224 goto fail;
225 }
226 if (ed->type == PIPE_ISOCHRONOUS) {
227 u16 frame = ohci_frame_no(ohci);
228
229 /* delay a few frames before the first TD */
230 frame += max_t (u16, 8, ed->interval);
231 frame &= ~(ed->interval - 1);
232 frame |= ed->branch;
233 urb->start_frame = frame;
234
235 /* yes, only URB_ISO_ASAP is supported, and
236 * urb->start_frame is never used as input.
237 */
238 }
239 } else if (ed->type == PIPE_ISOCHRONOUS)
240 urb->start_frame = ed->last_iso + ed->interval;
241
242 /* fill the TDs and link them to the ed; and
243 * enable that part of the schedule, if needed
244 * and update count of queued periodic urbs
245 */
246 urb->hcpriv = urb_priv;
247 td_submit_urb (ohci, urb);
248
249 fail:
250 if (retval)
251 urb_free_priv (ohci, urb_priv);
252 spin_unlock_irqrestore (&ohci->lock, flags);
253 return retval;
254 }
255
256 /*
257 * decouple the URB from the HC queues (TDs, urb_priv).
258 * reporting is always done
259 * asynchronously, and we might be dealing with an urb that's
260 * partially transferred, or an ED with other urbs being unlinked.
261 */
262 static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
263 {
264 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
265 unsigned long flags;
266 int rc;
267
268 #ifdef OHCI_VERBOSE_DEBUG
269 urb_print(urb, "UNLINK", 1, status);
270 #endif
271
272 spin_lock_irqsave (&ohci->lock, flags);
273 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
274 if (rc) {
275 ; /* Do nothing */
276 } else if (ohci->rh_state == OHCI_RH_RUNNING) {
277 urb_priv_t *urb_priv;
278
279 /* Unless an IRQ completed the unlink while it was being
280 * handed to us, flag it for unlink and giveback, and force
281 * some upcoming INTR_SF to call finish_unlinks()
282 */
283 urb_priv = urb->hcpriv;
284 if (urb_priv) {
285 if (urb_priv->ed->state == ED_OPER)
286 start_ed_unlink (ohci, urb_priv->ed);
287 }
288 } else {
289 /*
290 * with HC dead, we won't respect hc queue pointers
291 * any more ... just clean up every urb's memory.
292 */
293 if (urb->hcpriv)
294 finish_urb(ohci, urb, status);
295 }
296 spin_unlock_irqrestore (&ohci->lock, flags);
297 return rc;
298 }
299
300 /*-------------------------------------------------------------------------*/
301
302 /* frees config/altsetting state for endpoints,
303 * including ED memory, dummy TD, and bulk/intr data toggle
304 */
305
306 static void
307 ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
308 {
309 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
310 unsigned long flags;
311 struct ed *ed = ep->hcpriv;
312 unsigned limit = 1000;
313
314 /* ASSERT: any requests/urbs are being unlinked */
315 /* ASSERT: nobody can be submitting urbs for this any more */
316
317 if (!ed)
318 return;
319
320 rescan:
321 spin_lock_irqsave (&ohci->lock, flags);
322
323 if (ohci->rh_state != OHCI_RH_RUNNING) {
324 sanitize:
325 ed->state = ED_IDLE;
326 if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
327 ohci->eds_scheduled--;
328 finish_unlinks (ohci, 0);
329 }
330
331 switch (ed->state) {
332 case ED_UNLINK: /* wait for hw to finish? */
333 /* major IRQ delivery trouble loses INTR_SF too... */
334 if (limit-- == 0) {
335 ohci_warn(ohci, "ED unlink timeout\n");
336 if (quirk_zfmicro(ohci)) {
337 ohci_warn(ohci, "Attempting ZF TD recovery\n");
338 ohci->ed_to_check = ed;
339 ohci->zf_delay = 2;
340 }
341 goto sanitize;
342 }
343 spin_unlock_irqrestore (&ohci->lock, flags);
344 schedule_timeout_uninterruptible(1);
345 goto rescan;
346 case ED_IDLE: /* fully unlinked */
347 if (list_empty (&ed->td_list)) {
348 td_free (ohci, ed->dummy);
349 ed_free (ohci, ed);
350 break;
351 }
352 /* else FALL THROUGH */
353 default:
354 /* caller was supposed to have unlinked any requests;
355 * that's not our job. can't recover; must leak ed.
356 */
357 ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
358 ed, ep->desc.bEndpointAddress, ed->state,
359 list_empty (&ed->td_list) ? "" : " (has tds)");
360 td_free (ohci, ed->dummy);
361 break;
362 }
363 ep->hcpriv = NULL;
364 spin_unlock_irqrestore (&ohci->lock, flags);
365 }
366
367 static int ohci_get_frame (struct usb_hcd *hcd)
368 {
369 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
370
371 return ohci_frame_no(ohci);
372 }
373
374 static void ohci_usb_reset (struct ohci_hcd *ohci)
375 {
376 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
377 ohci->hc_control &= OHCI_CTRL_RWC;
378 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
379 ohci->rh_state = OHCI_RH_HALTED;
380 }
381
382 /* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
383 * other cases where the next software may expect clean state from the
384 * "firmware". this is bus-neutral, unlike shutdown() methods.
385 */
386 static void
387 ohci_shutdown (struct usb_hcd *hcd)
388 {
389 struct ohci_hcd *ohci;
390
391 ohci = hcd_to_ohci (hcd);
392 ohci_writel(ohci, (u32) ~0, &ohci->regs->intrdisable);
393
394 /* Software reset, after which the controller goes into SUSPEND */
395 ohci_writel(ohci, OHCI_HCR, &ohci->regs->cmdstatus);
396 ohci_readl(ohci, &ohci->regs->cmdstatus); /* flush the writes */
397 udelay(10);
398
399 ohci_writel(ohci, ohci->fminterval, &ohci->regs->fminterval);
400 }
401
402 static int check_ed(struct ohci_hcd *ohci, struct ed *ed)
403 {
404 return (hc32_to_cpu(ohci, ed->hwINFO) & ED_IN) != 0
405 && (hc32_to_cpu(ohci, ed->hwHeadP) & TD_MASK)
406 == (hc32_to_cpu(ohci, ed->hwTailP) & TD_MASK)
407 && !list_empty(&ed->td_list);
408 }
409
410 /* ZF Micro watchdog timer callback. The ZF Micro chipset sometimes completes
411 * an interrupt TD but neglects to add it to the donelist. On systems with
412 * this chipset, we need to periodically check the state of the queues to look
413 * for such "lost" TDs.
414 */
415 static void unlink_watchdog_func(unsigned long _ohci)
416 {
417 unsigned long flags;
418 unsigned max;
419 unsigned seen_count = 0;
420 unsigned i;
421 struct ed **seen = NULL;
422 struct ohci_hcd *ohci = (struct ohci_hcd *) _ohci;
423
424 spin_lock_irqsave(&ohci->lock, flags);
425 max = ohci->eds_scheduled;
426 if (!max)
427 goto done;
428
429 if (ohci->ed_to_check)
430 goto out;
431
432 seen = kcalloc(max, sizeof *seen, GFP_ATOMIC);
433 if (!seen)
434 goto out;
435
436 for (i = 0; i < NUM_INTS; i++) {
437 struct ed *ed = ohci->periodic[i];
438
439 while (ed) {
440 unsigned temp;
441
442 /* scan this branch of the periodic schedule tree */
443 for (temp = 0; temp < seen_count; temp++) {
444 if (seen[temp] == ed) {
445 /* we've checked it and what's after */
446 ed = NULL;
447 break;
448 }
449 }
450 if (!ed)
451 break;
452 seen[seen_count++] = ed;
453 if (!check_ed(ohci, ed)) {
454 ed = ed->ed_next;
455 continue;
456 }
457
458 /* HC's TD list is empty, but HCD sees at least one
459 * TD that's not been sent through the donelist.
460 */
461 ohci->ed_to_check = ed;
462 ohci->zf_delay = 2;
463
464 /* The HC may wait until the next frame to report the
465 * TD as done through the donelist and INTR_WDH. (We
466 * just *assume* it's not a multi-TD interrupt URB;
467 * those could defer the IRQ more than one frame, using
468 * DI...) Check again after the next INTR_SF.
469 */
470 ohci_writel(ohci, OHCI_INTR_SF,
471 &ohci->regs->intrstatus);
472 ohci_writel(ohci, OHCI_INTR_SF,
473 &ohci->regs->intrenable);
474
475 /* flush those writes */
476 (void) ohci_readl(ohci, &ohci->regs->control);
477
478 goto out;
479 }
480 }
481 out:
482 kfree(seen);
483 if (ohci->eds_scheduled)
484 mod_timer(&ohci->unlink_watchdog, round_jiffies(jiffies + HZ));
485 done:
486 spin_unlock_irqrestore(&ohci->lock, flags);
487 }
488
489 /*-------------------------------------------------------------------------*
490 * HC functions
491 *-------------------------------------------------------------------------*/
492
493 /* init memory, and kick BIOS/SMM off */
494
495 static int ohci_init (struct ohci_hcd *ohci)
496 {
497 int ret;
498 struct usb_hcd *hcd = ohci_to_hcd(ohci);
499
500 if (distrust_firmware)
501 ohci->flags |= OHCI_QUIRK_HUB_POWER;
502
503 ohci->rh_state = OHCI_RH_HALTED;
504 ohci->regs = hcd->regs;
505
506 /* REVISIT this BIOS handshake is now moved into PCI "quirks", and
507 * was never needed for most non-PCI systems ... remove the code?
508 */
509
510 #ifndef IR_DISABLE
511 /* SMM owns the HC? not for long! */
512 if (!no_handshake && ohci_readl (ohci,
513 &ohci->regs->control) & OHCI_CTRL_IR) {
514 u32 temp;
515
516 ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n");
517
518 /* this timeout is arbitrary. we make it long, so systems
519 * depending on usb keyboards may be usable even if the
520 * BIOS/SMM code seems pretty broken.
521 */
522 temp = 500; /* arbitrary: five seconds */
523
524 ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable);
525 ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus);
526 while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) {
527 msleep (10);
528 if (--temp == 0) {
529 ohci_err (ohci, "USB HC takeover failed!"
530 " (BIOS/SMM bug)\n");
531 return -EBUSY;
532 }
533 }
534 ohci_usb_reset (ohci);
535 }
536 #endif
537
538 /* Disable HC interrupts */
539 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
540
541 /* flush the writes, and save key bits like RWC */
542 if (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_RWC)
543 ohci->hc_control |= OHCI_CTRL_RWC;
544
545 /* Read the number of ports unless overridden */
546 if (ohci->num_ports == 0)
547 ohci->num_ports = roothub_a(ohci) & RH_A_NDP;
548
549 if (ohci->hcca)
550 return 0;
551
552 ohci->hcca = dma_alloc_coherent (hcd->self.controller,
553 sizeof *ohci->hcca, &ohci->hcca_dma, 0);
554 if (!ohci->hcca)
555 return -ENOMEM;
556
557 if ((ret = ohci_mem_init (ohci)) < 0)
558 ohci_stop (hcd);
559 else {
560 create_debug_files (ohci);
561 }
562
563 return ret;
564 }
565
566 /*-------------------------------------------------------------------------*/
567
568 /* Start an OHCI controller, set the BUS operational
569 * resets USB and controller
570 * enable interrupts
571 */
572 static int ohci_run (struct ohci_hcd *ohci)
573 {
574 u32 mask, val;
575 int first = ohci->fminterval == 0;
576 struct usb_hcd *hcd = ohci_to_hcd(ohci);
577
578 ohci->rh_state = OHCI_RH_HALTED;
579
580 /* boot firmware should have set this up (5.1.1.3.1) */
581 if (first) {
582
583 val = ohci_readl (ohci, &ohci->regs->fminterval);
584 ohci->fminterval = val & 0x3fff;
585 if (ohci->fminterval != FI)
586 ohci_dbg (ohci, "fminterval delta %d\n",
587 ohci->fminterval - FI);
588 ohci->fminterval |= FSMP (ohci->fminterval) << 16;
589 /* also: power/overcurrent flags in roothub.a */
590 }
591
592 /* Reset USB nearly "by the book". RemoteWakeupConnected has
593 * to be checked in case boot firmware (BIOS/SMM/...) has set up
594 * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM).
595 * If the bus glue detected wakeup capability then it should
596 * already be enabled; if so we'll just enable it again.
597 */
598 if ((ohci->hc_control & OHCI_CTRL_RWC) != 0)
599 device_set_wakeup_capable(hcd->self.controller, 1);
600
601 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
602 case OHCI_USB_OPER:
603 val = 0;
604 break;
605 case OHCI_USB_SUSPEND:
606 case OHCI_USB_RESUME:
607 ohci->hc_control &= OHCI_CTRL_RWC;
608 ohci->hc_control |= OHCI_USB_RESUME;
609 val = 10 /* msec wait */;
610 break;
611 // case OHCI_USB_RESET:
612 default:
613 ohci->hc_control &= OHCI_CTRL_RWC;
614 ohci->hc_control |= OHCI_USB_RESET;
615 val = 50 /* msec wait */;
616 break;
617 }
618 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
619 // flush the writes
620 (void) ohci_readl (ohci, &ohci->regs->control);
621 msleep(val);
622
623 memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
624
625 /* 2msec timelimit here means no irqs/preempt */
626 spin_lock_irq (&ohci->lock);
627
628 retry:
629 /* HC Reset requires max 10 us delay */
630 ohci_writel (ohci, OHCI_HCR, &ohci->regs->cmdstatus);
631 val = 30; /* ... allow extra time */
632 while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
633 if (--val == 0) {
634 spin_unlock_irq (&ohci->lock);
635 ohci_err (ohci, "USB HC reset timed out!\n");
636 return -1;
637 }
638 udelay (1);
639 }
640
641 /* now we're in the SUSPEND state ... must go OPERATIONAL
642 * within 2msec else HC enters RESUME
643 *
644 * ... but some hardware won't init fmInterval "by the book"
645 * (SiS, OPTi ...), so reset again instead. SiS doesn't need
646 * this if we write fmInterval after we're OPERATIONAL.
647 * Unclear about ALi, ServerWorks, and others ... this could
648 * easily be a longstanding bug in chip init on Linux.
649 */
650 if (ohci->flags & OHCI_QUIRK_INITRESET) {
651 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
652 // flush those writes
653 (void) ohci_readl (ohci, &ohci->regs->control);
654 }
655
656 /* Tell the controller where the control and bulk lists are
657 * The lists are empty now. */
658 ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
659 ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
660
661 /* a reset clears this */
662 ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
663
664 periodic_reinit (ohci);
665
666 /* some OHCI implementations are finicky about how they init.
667 * bogus values here mean not even enumeration could work.
668 */
669 if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
670 || !ohci_readl (ohci, &ohci->regs->periodicstart)) {
671 if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
672 ohci->flags |= OHCI_QUIRK_INITRESET;
673 ohci_dbg (ohci, "enabling initreset quirk\n");
674 goto retry;
675 }
676 spin_unlock_irq (&ohci->lock);
677 ohci_err (ohci, "init err (%08x %04x)\n",
678 ohci_readl (ohci, &ohci->regs->fminterval),
679 ohci_readl (ohci, &ohci->regs->periodicstart));
680 return -EOVERFLOW;
681 }
682
683 /* use rhsc irqs after khubd is fully initialized */
684 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
685 hcd->uses_new_polling = 1;
686
687 /* start controller operations */
688 ohci->hc_control &= OHCI_CTRL_RWC;
689 ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
690 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
691 ohci->rh_state = OHCI_RH_RUNNING;
692
693 /* wake on ConnectStatusChange, matching external hubs */
694 ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
695
696 /* Choose the interrupts we care about now, others later on demand */
697 mask = OHCI_INTR_INIT;
698 ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
699 ohci_writel (ohci, mask, &ohci->regs->intrenable);
700
701 /* handle root hub init quirks ... */
702 val = roothub_a (ohci);
703 val &= ~(RH_A_PSM | RH_A_OCPM);
704 if (ohci->flags & OHCI_QUIRK_SUPERIO) {
705 /* NSC 87560 and maybe others */
706 val |= RH_A_NOCP;
707 val &= ~(RH_A_POTPGT | RH_A_NPS);
708 ohci_writel (ohci, val, &ohci->regs->roothub.a);
709 } else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
710 (ohci->flags & OHCI_QUIRK_HUB_POWER)) {
711 /* hub power always on; required for AMD-756 and some
712 * Mac platforms. ganged overcurrent reporting, if any.
713 */
714 val |= RH_A_NPS;
715 ohci_writel (ohci, val, &ohci->regs->roothub.a);
716 }
717 ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
718 ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
719 &ohci->regs->roothub.b);
720 // flush those writes
721 (void) ohci_readl (ohci, &ohci->regs->control);
722
723 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
724 spin_unlock_irq (&ohci->lock);
725
726 // POTPGT delay is bits 24-31, in 2 ms units.
727 mdelay ((val >> 23) & 0x1fe);
728
729 if (quirk_zfmicro(ohci)) {
730 /* Create timer to watch for bad queue state on ZF Micro */
731 setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
732 (unsigned long) ohci);
733
734 ohci->eds_scheduled = 0;
735 ohci->ed_to_check = NULL;
736 }
737
738 ohci_dump (ohci, 1);
739
740 return 0;
741 }
742
743 /*-------------------------------------------------------------------------*/
744
745 /* an interrupt happens */
746
747 static irqreturn_t ohci_irq (struct usb_hcd *hcd)
748 {
749 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
750 struct ohci_regs __iomem *regs = ohci->regs;
751 int ints;
752
753 /* Read interrupt status (and flush pending writes). We ignore the
754 * optimization of checking the LSB of hcca->done_head; it doesn't
755 * work on all systems (edge triggering for OHCI can be a factor).
756 */
757 ints = ohci_readl(ohci, &regs->intrstatus);
758
759 /* Check for an all 1's result which is a typical consequence
760 * of dead, unclocked, or unplugged (CardBus...) devices
761 */
762 if (ints == ~(u32)0) {
763 ohci->rh_state = OHCI_RH_HALTED;
764 ohci_dbg (ohci, "device removed!\n");
765 usb_hc_died(hcd);
766 return IRQ_HANDLED;
767 }
768
769 /* We only care about interrupts that are enabled */
770 ints &= ohci_readl(ohci, &regs->intrenable);
771
772 /* interrupt for some other device? */
773 if (ints == 0 || unlikely(ohci->rh_state == OHCI_RH_HALTED))
774 return IRQ_NOTMINE;
775
776 if (ints & OHCI_INTR_UE) {
777 // e.g. due to PCI Master/Target Abort
778 if (quirk_nec(ohci)) {
779 /* Workaround for a silicon bug in some NEC chips used
780 * in Apple's PowerBooks. Adapted from Darwin code.
781 */
782 ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
783
784 ohci_writel (ohci, OHCI_INTR_UE, &regs->intrdisable);
785
786 schedule_work (&ohci->nec_work);
787 } else {
788 ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
789 ohci->rh_state = OHCI_RH_HALTED;
790 usb_hc_died(hcd);
791 }
792
793 ohci_dump (ohci, 1);
794 ohci_usb_reset (ohci);
795 }
796
797 if (ints & OHCI_INTR_RHSC) {
798 ohci_vdbg(ohci, "rhsc\n");
799 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
800 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
801 &regs->intrstatus);
802
803 /* NOTE: Vendors didn't always make the same implementation
804 * choices for RHSC. Many followed the spec; RHSC triggers
805 * on an edge, like setting and maybe clearing a port status
806 * change bit. With others it's level-triggered, active
807 * until khubd clears all the port status change bits. We'll
808 * always disable it here and rely on polling until khubd
809 * re-enables it.
810 */
811 ohci_writel(ohci, OHCI_INTR_RHSC, &regs->intrdisable);
812 usb_hcd_poll_rh_status(hcd);
813 }
814
815 /* For connect and disconnect events, we expect the controller
816 * to turn on RHSC along with RD. But for remote wakeup events
817 * this might not happen.
818 */
819 else if (ints & OHCI_INTR_RD) {
820 ohci_vdbg(ohci, "resume detect\n");
821 ohci_writel(ohci, OHCI_INTR_RD, &regs->intrstatus);
822 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
823 if (ohci->autostop) {
824 spin_lock (&ohci->lock);
825 ohci_rh_resume (ohci);
826 spin_unlock (&ohci->lock);
827 } else
828 usb_hcd_resume_root_hub(hcd);
829 }
830
831 if (ints & OHCI_INTR_WDH) {
832 spin_lock (&ohci->lock);
833 dl_done_list (ohci);
834 spin_unlock (&ohci->lock);
835 }
836
837 if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
838 spin_lock(&ohci->lock);
839 if (ohci->ed_to_check) {
840 struct ed *ed = ohci->ed_to_check;
841
842 if (check_ed(ohci, ed)) {
843 /* HC thinks the TD list is empty; HCD knows
844 * at least one TD is outstanding
845 */
846 if (--ohci->zf_delay == 0) {
847 struct td *td = list_entry(
848 ed->td_list.next,
849 struct td, td_list);
850 ohci_warn(ohci,
851 "Reclaiming orphan TD %p\n",
852 td);
853 takeback_td(ohci, td);
854 ohci->ed_to_check = NULL;
855 }
856 } else
857 ohci->ed_to_check = NULL;
858 }
859 spin_unlock(&ohci->lock);
860 }
861
862 /* could track INTR_SO to reduce available PCI/... bandwidth */
863
864 /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
865 * when there's still unlinking to be done (next frame).
866 */
867 spin_lock (&ohci->lock);
868 if (ohci->ed_rm_list)
869 finish_unlinks (ohci, ohci_frame_no(ohci));
870 if ((ints & OHCI_INTR_SF) != 0
871 && !ohci->ed_rm_list
872 && !ohci->ed_to_check
873 && ohci->rh_state == OHCI_RH_RUNNING)
874 ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
875 spin_unlock (&ohci->lock);
876
877 if (ohci->rh_state == OHCI_RH_RUNNING) {
878 ohci_writel (ohci, ints, &regs->intrstatus);
879 ohci_writel (ohci, OHCI_INTR_MIE, &regs->intrenable);
880 // flush those writes
881 (void) ohci_readl (ohci, &ohci->regs->control);
882 }
883
884 return IRQ_HANDLED;
885 }
886
887 /*-------------------------------------------------------------------------*/
888
889 static void ohci_stop (struct usb_hcd *hcd)
890 {
891 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
892
893 ohci_dump (ohci, 1);
894
895 if (quirk_nec(ohci))
896 flush_work_sync(&ohci->nec_work);
897
898 ohci_usb_reset (ohci);
899 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
900 free_irq(hcd->irq, hcd);
901 hcd->irq = 0;
902
903 if (quirk_zfmicro(ohci))
904 del_timer(&ohci->unlink_watchdog);
905 if (quirk_amdiso(ohci))
906 usb_amd_dev_put();
907
908 remove_debug_files (ohci);
909 ohci_mem_cleanup (ohci);
910 if (ohci->hcca) {
911 dma_free_coherent (hcd->self.controller,
912 sizeof *ohci->hcca,
913 ohci->hcca, ohci->hcca_dma);
914 ohci->hcca = NULL;
915 ohci->hcca_dma = 0;
916 }
917 }
918
919 /*-------------------------------------------------------------------------*/
920
921 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
922
923 /* must not be called from interrupt context */
924 static int ohci_restart (struct ohci_hcd *ohci)
925 {
926 int temp;
927 int i;
928 struct urb_priv *priv;
929
930 spin_lock_irq(&ohci->lock);
931 ohci->rh_state = OHCI_RH_HALTED;
932
933 /* Recycle any "live" eds/tds (and urbs). */
934 if (!list_empty (&ohci->pending))
935 ohci_dbg(ohci, "abort schedule...\n");
936 list_for_each_entry (priv, &ohci->pending, pending) {
937 struct urb *urb = priv->td[0]->urb;
938 struct ed *ed = priv->ed;
939
940 switch (ed->state) {
941 case ED_OPER:
942 ed->state = ED_UNLINK;
943 ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
944 ed_deschedule (ohci, ed);
945
946 ed->ed_next = ohci->ed_rm_list;
947 ed->ed_prev = NULL;
948 ohci->ed_rm_list = ed;
949 /* FALLTHROUGH */
950 case ED_UNLINK:
951 break;
952 default:
953 ohci_dbg(ohci, "bogus ed %p state %d\n",
954 ed, ed->state);
955 }
956
957 if (!urb->unlinked)
958 urb->unlinked = -ESHUTDOWN;
959 }
960 finish_unlinks (ohci, 0);
961 spin_unlock_irq(&ohci->lock);
962
963 /* paranoia, in case that didn't work: */
964
965 /* empty the interrupt branches */
966 for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
967 for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
968
969 /* no EDs to remove */
970 ohci->ed_rm_list = NULL;
971
972 /* empty control and bulk lists */
973 ohci->ed_controltail = NULL;
974 ohci->ed_bulktail = NULL;
975
976 if ((temp = ohci_run (ohci)) < 0) {
977 ohci_err (ohci, "can't restart, %d\n", temp);
978 return temp;
979 }
980 ohci_dbg(ohci, "restart complete\n");
981 return 0;
982 }
983
984 #endif
985
986 /*-------------------------------------------------------------------------*/
987
988 MODULE_AUTHOR (DRIVER_AUTHOR);
989 MODULE_DESCRIPTION(DRIVER_DESC);
990 MODULE_LICENSE ("GPL");
991
992 #ifdef CONFIG_PCI
993 #include "ohci-pci.c"
994 #define PCI_DRIVER ohci_pci_driver
995 #endif
996
997 #if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
998 #include "ohci-sa1111.c"
999 #define SA1111_DRIVER ohci_hcd_sa1111_driver
1000 #endif
1001
1002 #if defined(CONFIG_ARCH_S3C24XX) || defined(CONFIG_ARCH_S3C64XX)
1003 #include "ohci-s3c2410.c"
1004 #define PLATFORM_DRIVER ohci_hcd_s3c2410_driver
1005 #endif
1006
1007 #ifdef CONFIG_USB_OHCI_EXYNOS
1008 #include "ohci-exynos.c"
1009 #define PLATFORM_DRIVER exynos_ohci_driver
1010 #endif
1011
1012 #ifdef CONFIG_USB_OHCI_HCD_OMAP1
1013 #include "ohci-omap.c"
1014 #define OMAP1_PLATFORM_DRIVER ohci_hcd_omap_driver
1015 #endif
1016
1017 #ifdef CONFIG_USB_OHCI_HCD_OMAP3
1018 #include "ohci-omap3.c"
1019 #define OMAP3_PLATFORM_DRIVER ohci_hcd_omap3_driver
1020 #endif
1021
1022 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
1023 #include "ohci-pxa27x.c"
1024 #define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
1025 #endif
1026
1027 #ifdef CONFIG_ARCH_EP93XX
1028 #include "ohci-ep93xx.c"
1029 #define PLATFORM_DRIVER ohci_hcd_ep93xx_driver
1030 #endif
1031
1032 #ifdef CONFIG_MIPS_ALCHEMY
1033 #include "ohci-au1xxx.c"
1034 #define PLATFORM_DRIVER ohci_hcd_au1xxx_driver
1035 #endif
1036
1037 #ifdef CONFIG_PNX8550
1038 #include "ohci-pnx8550.c"
1039 #define PLATFORM_DRIVER ohci_hcd_pnx8550_driver
1040 #endif
1041
1042 #ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
1043 #include "ohci-ppc-soc.c"
1044 #define PLATFORM_DRIVER ohci_hcd_ppc_soc_driver
1045 #endif
1046
1047 #ifdef CONFIG_ARCH_AT91
1048 #include "ohci-at91.c"
1049 #define PLATFORM_DRIVER ohci_hcd_at91_driver
1050 #endif
1051
1052 #if defined(CONFIG_ARCH_PNX4008) || defined(CONFIG_ARCH_LPC32XX)
1053 #include "ohci-nxp.c"
1054 #define PLATFORM_DRIVER usb_hcd_nxp_driver
1055 #endif
1056
1057 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
1058 #include "ohci-da8xx.c"
1059 #define PLATFORM_DRIVER ohci_hcd_da8xx_driver
1060 #endif
1061
1062 #ifdef CONFIG_USB_OHCI_SH
1063 #include "ohci-sh.c"
1064 #define PLATFORM_DRIVER ohci_hcd_sh_driver
1065 #endif
1066
1067
1068 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF
1069 #include "ohci-ppc-of.c"
1070 #define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
1071 #endif
1072
1073 #ifdef CONFIG_PLAT_SPEAR
1074 #include "ohci-spear.c"
1075 #define PLATFORM_DRIVER spear_ohci_hcd_driver
1076 #endif
1077
1078 #ifdef CONFIG_PPC_PS3
1079 #include "ohci-ps3.c"
1080 #define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
1081 #endif
1082
1083 #ifdef CONFIG_MFD_SM501
1084 #include "ohci-sm501.c"
1085 #define SM501_OHCI_DRIVER ohci_hcd_sm501_driver
1086 #endif
1087
1088 #ifdef CONFIG_MFD_TC6393XB
1089 #include "ohci-tmio.c"
1090 #define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver
1091 #endif
1092
1093 #ifdef CONFIG_MACH_JZ4740
1094 #include "ohci-jz4740.c"
1095 #define PLATFORM_DRIVER ohci_hcd_jz4740_driver
1096 #endif
1097
1098 #ifdef CONFIG_USB_OCTEON_OHCI
1099 #include "ohci-octeon.c"
1100 #define PLATFORM_DRIVER ohci_octeon_driver
1101 #endif
1102
1103 #ifdef CONFIG_USB_CNS3XXX_OHCI
1104 #include "ohci-cns3xxx.c"
1105 #define PLATFORM_DRIVER ohci_hcd_cns3xxx_driver
1106 #endif
1107
1108 #ifdef CONFIG_CPU_XLR
1109 #include "ohci-xls.c"
1110 #define PLATFORM_DRIVER ohci_xls_driver
1111 #endif
1112
1113 #ifdef CONFIG_USB_OHCI_HCD_PLATFORM
1114 #include "ohci-platform.c"
1115 #define PLATFORM_DRIVER ohci_platform_driver
1116 #endif
1117
1118 #if !defined(PCI_DRIVER) && \
1119 !defined(PLATFORM_DRIVER) && \
1120 !defined(OMAP1_PLATFORM_DRIVER) && \
1121 !defined(OMAP3_PLATFORM_DRIVER) && \
1122 !defined(OF_PLATFORM_DRIVER) && \
1123 !defined(SA1111_DRIVER) && \
1124 !defined(PS3_SYSTEM_BUS_DRIVER) && \
1125 !defined(SM501_OHCI_DRIVER) && \
1126 !defined(TMIO_OHCI_DRIVER)
1127 #error "missing bus glue for ohci-hcd"
1128 #endif
1129
1130 static int __init ohci_hcd_mod_init(void)
1131 {
1132 int retval = 0;
1133
1134 if (usb_disabled())
1135 return -ENODEV;
1136
1137 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1138 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
1139 sizeof (struct ed), sizeof (struct td));
1140 set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1141
1142 #ifdef DEBUG
1143 ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root);
1144 if (!ohci_debug_root) {
1145 retval = -ENOENT;
1146 goto error_debug;
1147 }
1148 #endif
1149
1150 #ifdef PS3_SYSTEM_BUS_DRIVER
1151 retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1152 if (retval < 0)
1153 goto error_ps3;
1154 #endif
1155
1156 #ifdef PLATFORM_DRIVER
1157 retval = platform_driver_register(&PLATFORM_DRIVER);
1158 if (retval < 0)
1159 goto error_platform;
1160 #endif
1161
1162 #ifdef OMAP1_PLATFORM_DRIVER
1163 retval = platform_driver_register(&OMAP1_PLATFORM_DRIVER);
1164 if (retval < 0)
1165 goto error_omap1_platform;
1166 #endif
1167
1168 #ifdef OMAP3_PLATFORM_DRIVER
1169 retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER);
1170 if (retval < 0)
1171 goto error_omap3_platform;
1172 #endif
1173
1174 #ifdef OF_PLATFORM_DRIVER
1175 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
1176 if (retval < 0)
1177 goto error_of_platform;
1178 #endif
1179
1180 #ifdef SA1111_DRIVER
1181 retval = sa1111_driver_register(&SA1111_DRIVER);
1182 if (retval < 0)
1183 goto error_sa1111;
1184 #endif
1185
1186 #ifdef PCI_DRIVER
1187 retval = pci_register_driver(&PCI_DRIVER);
1188 if (retval < 0)
1189 goto error_pci;
1190 #endif
1191
1192 #ifdef SM501_OHCI_DRIVER
1193 retval = platform_driver_register(&SM501_OHCI_DRIVER);
1194 if (retval < 0)
1195 goto error_sm501;
1196 #endif
1197
1198 #ifdef TMIO_OHCI_DRIVER
1199 retval = platform_driver_register(&TMIO_OHCI_DRIVER);
1200 if (retval < 0)
1201 goto error_tmio;
1202 #endif
1203
1204 return retval;
1205
1206 /* Error path */
1207 #ifdef TMIO_OHCI_DRIVER
1208 platform_driver_unregister(&TMIO_OHCI_DRIVER);
1209 error_tmio:
1210 #endif
1211 #ifdef SM501_OHCI_DRIVER
1212 platform_driver_unregister(&SM501_OHCI_DRIVER);
1213 error_sm501:
1214 #endif
1215 #ifdef PCI_DRIVER
1216 pci_unregister_driver(&PCI_DRIVER);
1217 error_pci:
1218 #endif
1219 #ifdef SA1111_DRIVER
1220 sa1111_driver_unregister(&SA1111_DRIVER);
1221 error_sa1111:
1222 #endif
1223 #ifdef OF_PLATFORM_DRIVER
1224 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1225 error_of_platform:
1226 #endif
1227 #ifdef PLATFORM_DRIVER
1228 platform_driver_unregister(&PLATFORM_DRIVER);
1229 error_platform:
1230 #endif
1231 #ifdef OMAP1_PLATFORM_DRIVER
1232 platform_driver_unregister(&OMAP1_PLATFORM_DRIVER);
1233 error_omap1_platform:
1234 #endif
1235 #ifdef OMAP3_PLATFORM_DRIVER
1236 platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
1237 error_omap3_platform:
1238 #endif
1239 #ifdef PS3_SYSTEM_BUS_DRIVER
1240 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1241 error_ps3:
1242 #endif
1243 #ifdef DEBUG
1244 debugfs_remove(ohci_debug_root);
1245 ohci_debug_root = NULL;
1246 error_debug:
1247 #endif
1248
1249 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1250 return retval;
1251 }
1252 module_init(ohci_hcd_mod_init);
1253
1254 static void __exit ohci_hcd_mod_exit(void)
1255 {
1256 #ifdef TMIO_OHCI_DRIVER
1257 platform_driver_unregister(&TMIO_OHCI_DRIVER);
1258 #endif
1259 #ifdef SM501_OHCI_DRIVER
1260 platform_driver_unregister(&SM501_OHCI_DRIVER);
1261 #endif
1262 #ifdef PCI_DRIVER
1263 pci_unregister_driver(&PCI_DRIVER);
1264 #endif
1265 #ifdef SA1111_DRIVER
1266 sa1111_driver_unregister(&SA1111_DRIVER);
1267 #endif
1268 #ifdef OF_PLATFORM_DRIVER
1269 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1270 #endif
1271 #ifdef PLATFORM_DRIVER
1272 platform_driver_unregister(&PLATFORM_DRIVER);
1273 #endif
1274 #ifdef OMAP3_PLATFORM_DRIVER
1275 platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
1276 #endif
1277 #ifdef PS3_SYSTEM_BUS_DRIVER
1278 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1279 #endif
1280 #ifdef DEBUG
1281 debugfs_remove(ohci_debug_root);
1282 #endif
1283 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1284 }
1285 module_exit(ohci_hcd_mod_exit);
1286
Linux kernel - Deliverables
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