projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
USB: EHCI: log a warning if ehci-hcd is not loaded first
[deliverable/linux.git] / drivers / usb / host / ohci-hcd.c
1 /*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
6 *
7 * [ Initialisation is based on Linus' ]
8 * [ uhci code and gregs ohci fragments ]
9 * [ (C) Copyright 1999 Linus Torvalds ]
10 * [ (C) Copyright 1999 Gregory P. Smith]
11 *
12 *
13 * OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller
14 * interfaces (though some non-x86 Intel chips use it). It supports
15 * smarter hardware than UHCI. A download link for the spec available
16 * through the http://www.usb.org website.
17 *
18 * This file is licenced under the GPL.
19 */
20
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/pci.h>
24 #include <linux/kernel.h>
25 #include <linux/delay.h>
26 #include <linux/ioport.h>
27 #include <linux/sched.h>
28 #include <linux/slab.h>
29 #include <linux/errno.h>
30 #include <linux/init.h>
31 #include <linux/timer.h>
32 #include <linux/list.h>
33 #include <linux/usb.h>
34 #include <linux/usb/otg.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/dmapool.h>
37 #include <linux/reboot.h>
38 #include <linux/workqueue.h>
39 #include <linux/debugfs.h>
40
41 #include <asm/io.h>
42 #include <asm/irq.h>
43 #include <asm/system.h>
44 #include <asm/unaligned.h>
45 #include <asm/byteorder.h>
46
47 #include "../core/hcd.h"
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
80 static void ohci_dump (struct ohci_hcd *ohci, int verbose);
81 static int ohci_init (struct ohci_hcd *ohci);
82 static void ohci_stop (struct usb_hcd *hcd);
83
84 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
85 static int ohci_restart (struct ohci_hcd *ohci);
86 #endif
87
88 #ifdef CONFIG_PCI
89 static void quirk_amd_pll(int state);
90 static void amd_iso_dev_put(void);
91 #else
92 static inline void quirk_amd_pll(int state)
93 {
94 return;
95 }
96 static inline void amd_iso_dev_put(void)
97 {
98 return;
99 }
100 #endif
101
102
103 #include "ohci-hub.c"
104 #include "ohci-dbg.c"
105 #include "ohci-mem.c"
106 #include "ohci-q.c"
107
108
109 /*
110 * On architectures with edge-triggered interrupts we must never return
111 * IRQ_NONE.
112 */
113 #if defined(CONFIG_SA1111) /* ... or other edge-triggered systems */
114 #define IRQ_NOTMINE IRQ_HANDLED
115 #else
116 #define IRQ_NOTMINE IRQ_NONE
117 #endif
118
119
120 /* Some boards misreport power switching/overcurrent */
121 static int distrust_firmware = 1;
122 module_param (distrust_firmware, bool, 0);
123 MODULE_PARM_DESC (distrust_firmware,
124 "true to distrust firmware power/overcurrent setup");
125
126 /* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */
127 static int no_handshake = 0;
128 module_param (no_handshake, bool, 0);
129 MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
130
131 /*-------------------------------------------------------------------------*/
132
133 /*
134 * queue up an urb for anything except the root hub
135 */
136 static int ohci_urb_enqueue (
137 struct usb_hcd *hcd,
138 struct urb *urb,
139 gfp_t mem_flags
140 ) {
141 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
142 struct ed *ed;
143 urb_priv_t *urb_priv;
144 unsigned int pipe = urb->pipe;
145 int i, size = 0;
146 unsigned long flags;
147 int retval = 0;
148
149 #ifdef OHCI_VERBOSE_DEBUG
150 urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
151 #endif
152
153 /* every endpoint has a ed, locate and maybe (re)initialize it */
154 if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
155 return -ENOMEM;
156
157 /* for the private part of the URB we need the number of TDs (size) */
158 switch (ed->type) {
159 case PIPE_CONTROL:
160 /* td_submit_urb() doesn't yet handle these */
161 if (urb->transfer_buffer_length > 4096)
162 return -EMSGSIZE;
163
164 /* 1 TD for setup, 1 for ACK, plus ... */
165 size = 2;
166 /* FALLTHROUGH */
167 // case PIPE_INTERRUPT:
168 // case PIPE_BULK:
169 default:
170 /* one TD for every 4096 Bytes (can be upto 8K) */
171 size += urb->transfer_buffer_length / 4096;
172 /* ... and for any remaining bytes ... */
173 if ((urb->transfer_buffer_length % 4096) != 0)
174 size++;
175 /* ... and maybe a zero length packet to wrap it up */
176 if (size == 0)
177 size++;
178 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
179 && (urb->transfer_buffer_length
180 % usb_maxpacket (urb->dev, pipe,
181 usb_pipeout (pipe))) == 0)
182 size++;
183 break;
184 case PIPE_ISOCHRONOUS: /* number of packets from URB */
185 size = urb->number_of_packets;
186 break;
187 }
188
189 /* allocate the private part of the URB */
190 urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
191 mem_flags);
192 if (!urb_priv)
193 return -ENOMEM;
194 INIT_LIST_HEAD (&urb_priv->pending);
195 urb_priv->length = size;
196 urb_priv->ed = ed;
197
198 /* allocate the TDs (deferring hash chain updates) */
199 for (i = 0; i < size; i++) {
200 urb_priv->td [i] = td_alloc (ohci, mem_flags);
201 if (!urb_priv->td [i]) {
202 urb_priv->length = i;
203 urb_free_priv (ohci, urb_priv);
204 return -ENOMEM;
205 }
206 }
207
208 spin_lock_irqsave (&ohci->lock, flags);
209
210 /* don't submit to a dead HC */
211 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
212 retval = -ENODEV;
213 goto fail;
214 }
215 if (!HC_IS_RUNNING(hcd->state)) {
216 retval = -ENODEV;
217 goto fail;
218 }
219 retval = usb_hcd_link_urb_to_ep(hcd, urb);
220 if (retval)
221 goto fail;
222
223 /* schedule the ed if needed */
224 if (ed->state == ED_IDLE) {
225 retval = ed_schedule (ohci, ed);
226 if (retval < 0) {
227 usb_hcd_unlink_urb_from_ep(hcd, urb);
228 goto fail;
229 }
230 if (ed->type == PIPE_ISOCHRONOUS) {
231 u16 frame = ohci_frame_no(ohci);
232
233 /* delay a few frames before the first TD */
234 frame += max_t (u16, 8, ed->interval);
235 frame &= ~(ed->interval - 1);
236 frame |= ed->branch;
237 urb->start_frame = frame;
238
239 /* yes, only URB_ISO_ASAP is supported, and
240 * urb->start_frame is never used as input.
241 */
242 }
243 } else if (ed->type == PIPE_ISOCHRONOUS)
244 urb->start_frame = ed->last_iso + ed->interval;
245
246 /* fill the TDs and link them to the ed; and
247 * enable that part of the schedule, if needed
248 * and update count of queued periodic urbs
249 */
250 urb->hcpriv = urb_priv;
251 td_submit_urb (ohci, urb);
252
253 fail:
254 if (retval)
255 urb_free_priv (ohci, urb_priv);
256 spin_unlock_irqrestore (&ohci->lock, flags);
257 return retval;
258 }
259
260 /*
261 * decouple the URB from the HC queues (TDs, urb_priv).
262 * reporting is always done
263 * asynchronously, and we might be dealing with an urb that's
264 * partially transferred, or an ED with other urbs being unlinked.
265 */
266 static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
267 {
268 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
269 unsigned long flags;
270 int rc;
271
272 #ifdef OHCI_VERBOSE_DEBUG
273 urb_print(urb, "UNLINK", 1, status);
274 #endif
275
276 spin_lock_irqsave (&ohci->lock, flags);
277 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
278 if (rc) {
279 ; /* Do nothing */
280 } else if (HC_IS_RUNNING(hcd->state)) {
281 urb_priv_t *urb_priv;
282
283 /* Unless an IRQ completed the unlink while it was being
284 * handed to us, flag it for unlink and giveback, and force
285 * some upcoming INTR_SF to call finish_unlinks()
286 */
287 urb_priv = urb->hcpriv;
288 if (urb_priv) {
289 if (urb_priv->ed->state == ED_OPER)
290 start_ed_unlink (ohci, urb_priv->ed);
291 }
292 } else {
293 /*
294 * with HC dead, we won't respect hc queue pointers
295 * any more ... just clean up every urb's memory.
296 */
297 if (urb->hcpriv)
298 finish_urb(ohci, urb, status);
299 }
300 spin_unlock_irqrestore (&ohci->lock, flags);
301 return rc;
302 }
303
304 /*-------------------------------------------------------------------------*/
305
306 /* frees config/altsetting state for endpoints,
307 * including ED memory, dummy TD, and bulk/intr data toggle
308 */
309
310 static void
311 ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
312 {
313 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
314 unsigned long flags;
315 struct ed *ed = ep->hcpriv;
316 unsigned limit = 1000;
317
318 /* ASSERT: any requests/urbs are being unlinked */
319 /* ASSERT: nobody can be submitting urbs for this any more */
320
321 if (!ed)
322 return;
323
324 rescan:
325 spin_lock_irqsave (&ohci->lock, flags);
326
327 if (!HC_IS_RUNNING (hcd->state)) {
328 sanitize:
329 ed->state = ED_IDLE;
330 if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
331 ohci->eds_scheduled--;
332 finish_unlinks (ohci, 0);
333 }
334
335 switch (ed->state) {
336 case ED_UNLINK: /* wait for hw to finish? */
337 /* major IRQ delivery trouble loses INTR_SF too... */
338 if (limit-- == 0) {
339 ohci_warn(ohci, "ED unlink timeout\n");
340 if (quirk_zfmicro(ohci)) {
341 ohci_warn(ohci, "Attempting ZF TD recovery\n");
342 ohci->ed_to_check = ed;
343 ohci->zf_delay = 2;
344 }
345 goto sanitize;
346 }
347 spin_unlock_irqrestore (&ohci->lock, flags);
348 schedule_timeout_uninterruptible(1);
349 goto rescan;
350 case ED_IDLE: /* fully unlinked */
351 if (list_empty (&ed->td_list)) {
352 td_free (ohci, ed->dummy);
353 ed_free (ohci, ed);
354 break;
355 }
356 /* else FALL THROUGH */
357 default:
358 /* caller was supposed to have unlinked any requests;
359 * that's not our job. can't recover; must leak ed.
360 */
361 ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
362 ed, ep->desc.bEndpointAddress, ed->state,
363 list_empty (&ed->td_list) ? "" : " (has tds)");
364 td_free (ohci, ed->dummy);
365 break;
366 }
367 ep->hcpriv = NULL;
368 spin_unlock_irqrestore (&ohci->lock, flags);
369 return;
370 }
371
372 static int ohci_get_frame (struct usb_hcd *hcd)
373 {
374 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
375
376 return ohci_frame_no(ohci);
377 }
378
379 static void ohci_usb_reset (struct ohci_hcd *ohci)
380 {
381 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
382 ohci->hc_control &= OHCI_CTRL_RWC;
383 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
384 }
385
386 /* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
387 * other cases where the next software may expect clean state from the
388 * "firmware". this is bus-neutral, unlike shutdown() methods.
389 */
390 static void
391 ohci_shutdown (struct usb_hcd *hcd)
392 {
393 struct ohci_hcd *ohci;
394
395 ohci = hcd_to_ohci (hcd);
396 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
397 ohci_usb_reset (ohci);
398 /* flush the writes */
399 (void) ohci_readl (ohci, &ohci->regs->control);
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 disable (ohci);
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, temp;
575 int first = ohci->fminterval == 0;
576 struct usb_hcd *hcd = ohci_to_hcd(ohci);
577
578 disable (ohci);
579
580 /* boot firmware should have set this up (5.1.1.3.1) */
581 if (first) {
582
583 temp = ohci_readl (ohci, &ohci->regs->fminterval);
584 ohci->fminterval = temp & 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 was
593 * saved if boot firmware (BIOS/SMM/...) told us it's connected,
594 * or if bus glue did the same (e.g. for PCI add-in cards with
595 * PCI PM support).
596 */
597 if ((ohci->hc_control & OHCI_CTRL_RWC) != 0
598 && !device_may_wakeup(hcd->self.controller))
599 device_init_wakeup(hcd->self.controller, 1);
600
601 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
602 case OHCI_USB_OPER:
603 temp = 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 temp = 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 temp = 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(temp);
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 temp = 30; /* ... allow extra time */
632 while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
633 if (--temp == 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 hcd->poll_rh = 1;
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 hcd->state = HC_STATE_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 temp = roothub_a (ohci);
703 temp &= ~(RH_A_PSM | RH_A_OCPM);
704 if (ohci->flags & OHCI_QUIRK_SUPERIO) {
705 /* NSC 87560 and maybe others */
706 temp |= RH_A_NOCP;
707 temp &= ~(RH_A_POTPGT | RH_A_NPS);
708 ohci_writel (ohci, temp, &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 temp |= RH_A_NPS;
715 ohci_writel (ohci, temp, &ohci->regs->roothub.a);
716 }
717 ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
718 ohci_writel (ohci, (temp & 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 ((temp >> 23) & 0x1fe);
728 hcd->state = HC_STATE_RUNNING;
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
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, &regs->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 disable (ohci);
765 ohci_dbg (ohci, "device removed!\n");
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)
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 disable (ohci);
789 ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
790 }
791
792 ohci_dump (ohci, 1);
793 ohci_usb_reset (ohci);
794 }
795
796 if (ints & OHCI_INTR_RHSC) {
797 ohci_vdbg(ohci, "rhsc\n");
798 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
799 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
800 &regs->intrstatus);
801
802 /* NOTE: Vendors didn't always make the same implementation
803 * choices for RHSC. Many followed the spec; RHSC triggers
804 * on an edge, like setting and maybe clearing a port status
805 * change bit. With others it's level-triggered, active
806 * until khubd clears all the port status change bits. We'll
807 * always disable it here and rely on polling until khubd
808 * re-enables it.
809 */
810 ohci_writel(ohci, OHCI_INTR_RHSC, &regs->intrdisable);
811 usb_hcd_poll_rh_status(hcd);
812 }
813
814 /* For connect and disconnect events, we expect the controller
815 * to turn on RHSC along with RD. But for remote wakeup events
816 * this might not happen.
817 */
818 else if (ints & OHCI_INTR_RD) {
819 ohci_vdbg(ohci, "resume detect\n");
820 ohci_writel(ohci, OHCI_INTR_RD, &regs->intrstatus);
821 hcd->poll_rh = 1;
822 if (ohci->autostop) {
823 spin_lock (&ohci->lock);
824 ohci_rh_resume (ohci);
825 spin_unlock (&ohci->lock);
826 } else
827 usb_hcd_resume_root_hub(hcd);
828 }
829
830 if (ints & OHCI_INTR_WDH) {
831 spin_lock (&ohci->lock);
832 dl_done_list (ohci);
833 spin_unlock (&ohci->lock);
834 }
835
836 if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
837 spin_lock(&ohci->lock);
838 if (ohci->ed_to_check) {
839 struct ed *ed = ohci->ed_to_check;
840
841 if (check_ed(ohci, ed)) {
842 /* HC thinks the TD list is empty; HCD knows
843 * at least one TD is outstanding
844 */
845 if (--ohci->zf_delay == 0) {
846 struct td *td = list_entry(
847 ed->td_list.next,
848 struct td, td_list);
849 ohci_warn(ohci,
850 "Reclaiming orphan TD %p\n",
851 td);
852 takeback_td(ohci, td);
853 ohci->ed_to_check = NULL;
854 }
855 } else
856 ohci->ed_to_check = NULL;
857 }
858 spin_unlock(&ohci->lock);
859 }
860
861 /* could track INTR_SO to reduce available PCI/... bandwidth */
862
863 /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
864 * when there's still unlinking to be done (next frame).
865 */
866 spin_lock (&ohci->lock);
867 if (ohci->ed_rm_list)
868 finish_unlinks (ohci, ohci_frame_no(ohci));
869 if ((ints & OHCI_INTR_SF) != 0
870 && !ohci->ed_rm_list
871 && !ohci->ed_to_check
872 && HC_IS_RUNNING(hcd->state))
873 ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
874 spin_unlock (&ohci->lock);
875
876 if (HC_IS_RUNNING(hcd->state)) {
877 ohci_writel (ohci, ints, &regs->intrstatus);
878 ohci_writel (ohci, OHCI_INTR_MIE, &regs->intrenable);
879 // flush those writes
880 (void) ohci_readl (ohci, &ohci->regs->control);
881 }
882
883 return IRQ_HANDLED;
884 }
885
886 /*-------------------------------------------------------------------------*/
887
888 static void ohci_stop (struct usb_hcd *hcd)
889 {
890 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
891
892 ohci_dump (ohci, 1);
893
894 flush_scheduled_work();
895
896 ohci_usb_reset (ohci);
897 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
898 free_irq(hcd->irq, hcd);
899 hcd->irq = -1;
900
901 if (quirk_zfmicro(ohci))
902 del_timer(&ohci->unlink_watchdog);
903 if (quirk_amdiso(ohci))
904 amd_iso_dev_put();
905
906 remove_debug_files (ohci);
907 ohci_mem_cleanup (ohci);
908 if (ohci->hcca) {
909 dma_free_coherent (hcd->self.controller,
910 sizeof *ohci->hcca,
911 ohci->hcca, ohci->hcca_dma);
912 ohci->hcca = NULL;
913 ohci->hcca_dma = 0;
914 }
915 }
916
917 /*-------------------------------------------------------------------------*/
918
919 #if defined(CONFIG_PM) || defined(CONFIG_PCI)
920
921 /* must not be called from interrupt context */
922 static int ohci_restart (struct ohci_hcd *ohci)
923 {
924 int temp;
925 int i;
926 struct urb_priv *priv;
927
928 spin_lock_irq(&ohci->lock);
929 disable (ohci);
930
931 /* Recycle any "live" eds/tds (and urbs). */
932 if (!list_empty (&ohci->pending))
933 ohci_dbg(ohci, "abort schedule...\n");
934 list_for_each_entry (priv, &ohci->pending, pending) {
935 struct urb *urb = priv->td[0]->urb;
936 struct ed *ed = priv->ed;
937
938 switch (ed->state) {
939 case ED_OPER:
940 ed->state = ED_UNLINK;
941 ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
942 ed_deschedule (ohci, ed);
943
944 ed->ed_next = ohci->ed_rm_list;
945 ed->ed_prev = NULL;
946 ohci->ed_rm_list = ed;
947 /* FALLTHROUGH */
948 case ED_UNLINK:
949 break;
950 default:
951 ohci_dbg(ohci, "bogus ed %p state %d\n",
952 ed, ed->state);
953 }
954
955 if (!urb->unlinked)
956 urb->unlinked = -ESHUTDOWN;
957 }
958 finish_unlinks (ohci, 0);
959 spin_unlock_irq(&ohci->lock);
960
961 /* paranoia, in case that didn't work: */
962
963 /* empty the interrupt branches */
964 for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
965 for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
966
967 /* no EDs to remove */
968 ohci->ed_rm_list = NULL;
969
970 /* empty control and bulk lists */
971 ohci->ed_controltail = NULL;
972 ohci->ed_bulktail = NULL;
973
974 if ((temp = ohci_run (ohci)) < 0) {
975 ohci_err (ohci, "can't restart, %d\n", temp);
976 return temp;
977 }
978 ohci_dbg(ohci, "restart complete\n");
979 return 0;
980 }
981
982 #endif
983
984 /*-------------------------------------------------------------------------*/
985
986 MODULE_AUTHOR (DRIVER_AUTHOR);
987 MODULE_DESCRIPTION(DRIVER_DESC);
988 MODULE_LICENSE ("GPL");
989
990 #ifdef CONFIG_PCI
991 #include "ohci-pci.c"
992 #define PCI_DRIVER ohci_pci_driver
993 #endif
994
995 #if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
996 #include "ohci-sa1111.c"
997 #define SA1111_DRIVER ohci_hcd_sa1111_driver
998 #endif
999
1000 #ifdef CONFIG_ARCH_S3C2410
1001 #include "ohci-s3c2410.c"
1002 #define PLATFORM_DRIVER ohci_hcd_s3c2410_driver
1003 #endif
1004
1005 #ifdef CONFIG_ARCH_OMAP
1006 #include "ohci-omap.c"
1007 #define PLATFORM_DRIVER ohci_hcd_omap_driver
1008 #endif
1009
1010 #ifdef CONFIG_ARCH_LH7A404
1011 #include "ohci-lh7a404.c"
1012 #define PLATFORM_DRIVER ohci_hcd_lh7a404_driver
1013 #endif
1014
1015 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
1016 #include "ohci-pxa27x.c"
1017 #define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
1018 #endif
1019
1020 #ifdef CONFIG_ARCH_EP93XX
1021 #include "ohci-ep93xx.c"
1022 #define PLATFORM_DRIVER ohci_hcd_ep93xx_driver
1023 #endif
1024
1025 #ifdef CONFIG_SOC_AU1X00
1026 #include "ohci-au1xxx.c"
1027 #define PLATFORM_DRIVER ohci_hcd_au1xxx_driver
1028 #endif
1029
1030 #ifdef CONFIG_PNX8550
1031 #include "ohci-pnx8550.c"
1032 #define PLATFORM_DRIVER ohci_hcd_pnx8550_driver
1033 #endif
1034
1035 #ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
1036 #include "ohci-ppc-soc.c"
1037 #define PLATFORM_DRIVER ohci_hcd_ppc_soc_driver
1038 #endif
1039
1040 #ifdef CONFIG_ARCH_AT91
1041 #include "ohci-at91.c"
1042 #define PLATFORM_DRIVER ohci_hcd_at91_driver
1043 #endif
1044
1045 #ifdef CONFIG_ARCH_PNX4008
1046 #include "ohci-pnx4008.c"
1047 #define PLATFORM_DRIVER usb_hcd_pnx4008_driver
1048 #endif
1049
1050 #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
1051 defined(CONFIG_CPU_SUBTYPE_SH7721) || \
1052 defined(CONFIG_CPU_SUBTYPE_SH7763)
1053 #include "ohci-sh.c"
1054 #define PLATFORM_DRIVER ohci_hcd_sh_driver
1055 #endif
1056
1057
1058 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF
1059 #include "ohci-ppc-of.c"
1060 #define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
1061 #endif
1062
1063 #ifdef CONFIG_PPC_PS3
1064 #include "ohci-ps3.c"
1065 #define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
1066 #endif
1067
1068 #ifdef CONFIG_USB_OHCI_HCD_SSB
1069 #include "ohci-ssb.c"
1070 #define SSB_OHCI_DRIVER ssb_ohci_driver
1071 #endif
1072
1073 #ifdef CONFIG_MFD_SM501
1074 #include "ohci-sm501.c"
1075 #define SM501_OHCI_DRIVER ohci_hcd_sm501_driver
1076 #endif
1077
1078 #if !defined(PCI_DRIVER) && \
1079 !defined(PLATFORM_DRIVER) && \
1080 !defined(OF_PLATFORM_DRIVER) && \
1081 !defined(SA1111_DRIVER) && \
1082 !defined(PS3_SYSTEM_BUS_DRIVER) && \
1083 !defined(SM501_OHCI_DRIVER) && \
1084 !defined(SSB_OHCI_DRIVER)
1085 #error "missing bus glue for ohci-hcd"
1086 #endif
1087
1088 static int __init ohci_hcd_mod_init(void)
1089 {
1090 int retval = 0;
1091
1092 if (usb_disabled())
1093 return -ENODEV;
1094
1095 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1096 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
1097 sizeof (struct ed), sizeof (struct td));
1098 set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1099
1100 #ifdef DEBUG
1101 ohci_debug_root = debugfs_create_dir("ohci", NULL);
1102 if (!ohci_debug_root) {
1103 retval = -ENOENT;
1104 goto error_debug;
1105 }
1106 #endif
1107
1108 #ifdef PS3_SYSTEM_BUS_DRIVER
1109 retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1110 if (retval < 0)
1111 goto error_ps3;
1112 #endif
1113
1114 #ifdef PLATFORM_DRIVER
1115 retval = platform_driver_register(&PLATFORM_DRIVER);
1116 if (retval < 0)
1117 goto error_platform;
1118 #endif
1119
1120 #ifdef OF_PLATFORM_DRIVER
1121 retval = of_register_platform_driver(&OF_PLATFORM_DRIVER);
1122 if (retval < 0)
1123 goto error_of_platform;
1124 #endif
1125
1126 #ifdef SA1111_DRIVER
1127 retval = sa1111_driver_register(&SA1111_DRIVER);
1128 if (retval < 0)
1129 goto error_sa1111;
1130 #endif
1131
1132 #ifdef PCI_DRIVER
1133 retval = pci_register_driver(&PCI_DRIVER);
1134 if (retval < 0)
1135 goto error_pci;
1136 #endif
1137
1138 #ifdef SSB_OHCI_DRIVER
1139 retval = ssb_driver_register(&SSB_OHCI_DRIVER);
1140 if (retval)
1141 goto error_ssb;
1142 #endif
1143
1144 #ifdef SM501_OHCI_DRIVER
1145 retval = platform_driver_register(&SM501_OHCI_DRIVER);
1146 if (retval < 0)
1147 goto error_sm501;
1148 #endif
1149
1150 return retval;
1151
1152 /* Error path */
1153 #ifdef SM501_OHCI_DRIVER
1154 error_sm501:
1155 #endif
1156 #ifdef SSB_OHCI_DRIVER
1157 error_ssb:
1158 #endif
1159 #ifdef PCI_DRIVER
1160 pci_unregister_driver(&PCI_DRIVER);
1161 error_pci:
1162 #endif
1163 #ifdef SA1111_DRIVER
1164 sa1111_driver_unregister(&SA1111_DRIVER);
1165 error_sa1111:
1166 #endif
1167 #ifdef OF_PLATFORM_DRIVER
1168 of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1169 error_of_platform:
1170 #endif
1171 #ifdef PLATFORM_DRIVER
1172 platform_driver_unregister(&PLATFORM_DRIVER);
1173 error_platform:
1174 #endif
1175 #ifdef PS3_SYSTEM_BUS_DRIVER
1176 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1177 error_ps3:
1178 #endif
1179 #ifdef DEBUG
1180 debugfs_remove(ohci_debug_root);
1181 ohci_debug_root = NULL;
1182 error_debug:
1183 #endif
1184
1185 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1186 return retval;
1187 }
1188 module_init(ohci_hcd_mod_init);
1189
1190 static void __exit ohci_hcd_mod_exit(void)
1191 {
1192 #ifdef SM501_OHCI_DRIVER
1193 platform_driver_unregister(&SM501_OHCI_DRIVER);
1194 #endif
1195 #ifdef SSB_OHCI_DRIVER
1196 ssb_driver_unregister(&SSB_OHCI_DRIVER);
1197 #endif
1198 #ifdef PCI_DRIVER
1199 pci_unregister_driver(&PCI_DRIVER);
1200 #endif
1201 #ifdef SA1111_DRIVER
1202 sa1111_driver_unregister(&SA1111_DRIVER);
1203 #endif
1204 #ifdef OF_PLATFORM_DRIVER
1205 of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
1206 #endif
1207 #ifdef PLATFORM_DRIVER
1208 platform_driver_unregister(&PLATFORM_DRIVER);
1209 #endif
1210 #ifdef PS3_SYSTEM_BUS_DRIVER
1211 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1212 #endif
1213 #ifdef DEBUG
1214 debugfs_remove(ohci_debug_root);
1215 #endif
1216 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1217 }
1218 module_exit(ohci_hcd_mod_exit);
1219
Linux kernel - Deliverables
This page took 0.057187 seconds and 5 git commands to generate.