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24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/delay.h>
29#include <linux/ioport.h>
30#include <linux/sched.h>
31#include <linux/slab.h>
32#include <linux/errno.h>
33#include <linux/init.h>
34#include <linux/timer.h>
35#include <linux/list.h>
36#include <linux/usb.h>
37#include <linux/usb/otg.h>
38#include <linux/usb/hcd.h>
39#include <linux/dma-mapping.h>
40#include <linux/dmapool.h>
41#include <linux/workqueue.h>
42#include <linux/debugfs.h>
43#include <linux/genalloc.h>
44
45#include <asm/io.h>
46#include <asm/irq.h>
47#include <asm/unaligned.h>
48#include <asm/byteorder.h>
49
50
51#define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
52#define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
53
54
55
56
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
64#define IR_DISABLE
65#endif
66
67#ifdef CONFIG_ARCH_OMAP
68
69#define IR_DISABLE
70#endif
71
72
73
74static const char hcd_name [] = "ohci_hcd";
75
76#define STATECHANGE_DELAY msecs_to_jiffies(300)
77#define IO_WATCHDOG_DELAY msecs_to_jiffies(275)
78#define IO_WATCHDOG_OFF 0xffffff00
79
80#include "ohci.h"
81#include "pci-quirks.h"
82
83static void ohci_dump(struct ohci_hcd *ohci);
84static void ohci_stop(struct usb_hcd *hcd);
85static void io_watchdog_func(struct timer_list *t);
86
87#include "ohci-hub.c"
88#include "ohci-dbg.c"
89#include "ohci-mem.c"
90#include "ohci-q.c"
91
92
93
94
95
96
97#if defined(CONFIG_SA1111)
98#define IRQ_NOTMINE IRQ_HANDLED
99#else
100#define IRQ_NOTMINE IRQ_NONE
101#endif
102
103
104
105static bool distrust_firmware;
106module_param (distrust_firmware, bool, 0);
107MODULE_PARM_DESC (distrust_firmware,
108 "true to distrust firmware power/overcurrent setup");
109
110
111static bool no_handshake;
112module_param (no_handshake, bool, 0);
113MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
114
115
116
117static int number_of_tds(struct urb *urb)
118{
119 int len, i, num, this_sg_len;
120 struct scatterlist *sg;
121
122 len = urb->transfer_buffer_length;
123 i = urb->num_mapped_sgs;
124
125 if (len > 0 && i > 0) {
126 num = 0;
127 sg = urb->sg;
128 for (;;) {
129 this_sg_len = min_t(int, sg_dma_len(sg), len);
130 num += DIV_ROUND_UP(this_sg_len, 4096);
131 len -= this_sg_len;
132 if (--i <= 0 || len <= 0)
133 break;
134 sg = sg_next(sg);
135 }
136
137 } else {
138
139 num = DIV_ROUND_UP(len, 4096);
140 }
141 return num;
142}
143
144
145
146
147static int ohci_urb_enqueue (
148 struct usb_hcd *hcd,
149 struct urb *urb,
150 gfp_t mem_flags
151) {
152 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
153 struct ed *ed;
154 urb_priv_t *urb_priv;
155 unsigned int pipe = urb->pipe;
156 int i, size = 0;
157 unsigned long flags;
158 int retval = 0;
159
160
161 ed = ed_get(ohci, urb->ep, urb->dev, pipe, urb->interval);
162 if (! ed)
163 return -ENOMEM;
164
165
166 switch (ed->type) {
167 case PIPE_CONTROL:
168
169 if (urb->transfer_buffer_length > 4096)
170 return -EMSGSIZE;
171
172
173 size = 2;
174 fallthrough;
175
176
177 default:
178 size += number_of_tds(urb);
179
180 if (size == 0)
181 size++;
182 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
183 && (urb->transfer_buffer_length
184 % usb_maxpacket (urb->dev, pipe,
185 usb_pipeout (pipe))) == 0)
186 size++;
187 break;
188 case PIPE_ISOCHRONOUS:
189 size = urb->number_of_packets;
190 break;
191 }
192
193
194 urb_priv = kzalloc(struct_size(urb_priv, td, size), mem_flags);
195 if (!urb_priv)
196 return -ENOMEM;
197 INIT_LIST_HEAD (&urb_priv->pending);
198 urb_priv->length = size;
199 urb_priv->ed = ed;
200
201
202 for (i = 0; i < size; i++) {
203 urb_priv->td [i] = td_alloc (ohci, mem_flags);
204 if (!urb_priv->td [i]) {
205 urb_priv->length = i;
206 urb_free_priv (ohci, urb_priv);
207 return -ENOMEM;
208 }
209 }
210
211 spin_lock_irqsave (&ohci->lock, flags);
212
213
214 if (!HCD_HW_ACCESSIBLE(hcd)) {
215 retval = -ENODEV;
216 goto fail;
217 }
218 if (ohci->rh_state != OHCI_RH_RUNNING) {
219 retval = -ENODEV;
220 goto fail;
221 }
222 retval = usb_hcd_link_urb_to_ep(hcd, urb);
223 if (retval)
224 goto fail;
225
226
227 if (ed->state == ED_IDLE) {
228 retval = ed_schedule (ohci, ed);
229 if (retval < 0) {
230 usb_hcd_unlink_urb_from_ep(hcd, urb);
231 goto fail;
232 }
233
234
235 if (ohci->prev_frame_no == IO_WATCHDOG_OFF &&
236 list_empty(&ohci->eds_in_use) &&
237 !(ohci->flags & OHCI_QUIRK_QEMU)) {
238 ohci->prev_frame_no = ohci_frame_no(ohci);
239 mod_timer(&ohci->io_watchdog,
240 jiffies + IO_WATCHDOG_DELAY);
241 }
242 list_add(&ed->in_use_list, &ohci->eds_in_use);
243
244 if (ed->type == PIPE_ISOCHRONOUS) {
245 u16 frame = ohci_frame_no(ohci);
246
247
248 frame += max_t (u16, 8, ed->interval);
249 frame &= ~(ed->interval - 1);
250 frame |= ed->branch;
251 urb->start_frame = frame;
252 ed->last_iso = frame + ed->interval * (size - 1);
253 }
254 } else if (ed->type == PIPE_ISOCHRONOUS) {
255 u16 next = ohci_frame_no(ohci) + 1;
256 u16 frame = ed->last_iso + ed->interval;
257 u16 length = ed->interval * (size - 1);
258
259
260 if (unlikely(tick_before(frame, next))) {
261
262
263 if (urb->transfer_flags & URB_ISO_ASAP) {
264 frame += (next - frame + ed->interval - 1) &
265 -ed->interval;
266
267
268
269
270
271 } else {
272
273
274
275
276
277
278
279 urb_priv->td_cnt = DIV_ROUND_UP(
280 (u16) (next - frame),
281 ed->interval);
282 if (urb_priv->td_cnt >= urb_priv->length) {
283 ++urb_priv->td_cnt;
284 ohci_dbg(ohci, "iso underrun %p (%u+%u < %u)\n",
285 urb, frame, length,
286 next);
287 }
288 }
289 }
290 urb->start_frame = frame;
291 ed->last_iso = frame + length;
292 }
293
294
295
296
297
298 urb->hcpriv = urb_priv;
299 td_submit_urb (ohci, urb);
300
301fail:
302 if (retval)
303 urb_free_priv (ohci, urb_priv);
304 spin_unlock_irqrestore (&ohci->lock, flags);
305 return retval;
306}
307
308
309
310
311
312
313
314static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
315{
316 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
317 unsigned long flags;
318 int rc;
319 urb_priv_t *urb_priv;
320
321 spin_lock_irqsave (&ohci->lock, flags);
322 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
323 if (rc == 0) {
324
325
326
327
328
329 urb_priv = urb->hcpriv;
330 if (urb_priv->ed->state == ED_OPER)
331 start_ed_unlink(ohci, urb_priv->ed);
332
333 if (ohci->rh_state != OHCI_RH_RUNNING) {
334
335 ohci_work(ohci);
336 }
337 }
338 spin_unlock_irqrestore (&ohci->lock, flags);
339 return rc;
340}
341
342
343
344
345
346
347
348static void
349ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
350{
351 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
352 unsigned long flags;
353 struct ed *ed = ep->hcpriv;
354 unsigned limit = 1000;
355
356
357
358
359 if (!ed)
360 return;
361
362rescan:
363 spin_lock_irqsave (&ohci->lock, flags);
364
365 if (ohci->rh_state != OHCI_RH_RUNNING) {
366sanitize:
367 ed->state = ED_IDLE;
368 ohci_work(ohci);
369 }
370
371 switch (ed->state) {
372 case ED_UNLINK:
373
374 if (limit-- == 0) {
375 ohci_warn(ohci, "ED unlink timeout\n");
376 goto sanitize;
377 }
378 spin_unlock_irqrestore (&ohci->lock, flags);
379 schedule_timeout_uninterruptible(1);
380 goto rescan;
381 case ED_IDLE:
382 if (list_empty (&ed->td_list)) {
383 td_free (ohci, ed->dummy);
384 ed_free (ohci, ed);
385 break;
386 }
387 fallthrough;
388 default:
389
390
391
392 ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
393 ed, ep->desc.bEndpointAddress, ed->state,
394 list_empty (&ed->td_list) ? "" : " (has tds)");
395 td_free (ohci, ed->dummy);
396 break;
397 }
398 ep->hcpriv = NULL;
399 spin_unlock_irqrestore (&ohci->lock, flags);
400}
401
402static int ohci_get_frame (struct usb_hcd *hcd)
403{
404 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
405
406 return ohci_frame_no(ohci);
407}
408
409static void ohci_usb_reset (struct ohci_hcd *ohci)
410{
411 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
412 ohci->hc_control &= OHCI_CTRL_RWC;
413 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
414 ohci->rh_state = OHCI_RH_HALTED;
415}
416
417
418
419
420
421static void _ohci_shutdown(struct usb_hcd *hcd)
422{
423 struct ohci_hcd *ohci;
424
425 ohci = hcd_to_ohci (hcd);
426 ohci_writel(ohci, (u32) ~0, &ohci->regs->intrdisable);
427
428
429 ohci_writel(ohci, OHCI_HCR, &ohci->regs->cmdstatus);
430 ohci_readl(ohci, &ohci->regs->cmdstatus);
431 udelay(10);
432
433 ohci_writel(ohci, ohci->fminterval, &ohci->regs->fminterval);
434 ohci->rh_state = OHCI_RH_HALTED;
435}
436
437static void ohci_shutdown(struct usb_hcd *hcd)
438{
439 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
440 unsigned long flags;
441
442 spin_lock_irqsave(&ohci->lock, flags);
443 _ohci_shutdown(hcd);
444 spin_unlock_irqrestore(&ohci->lock, flags);
445}
446
447
448
449
450
451
452
453static int ohci_init (struct ohci_hcd *ohci)
454{
455 int ret;
456 struct usb_hcd *hcd = ohci_to_hcd(ohci);
457
458
459 if (!hcd->localmem_pool)
460 hcd->self.sg_tablesize = ~0;
461
462 if (distrust_firmware)
463 ohci->flags |= OHCI_QUIRK_HUB_POWER;
464
465 ohci->rh_state = OHCI_RH_HALTED;
466 ohci->regs = hcd->regs;
467
468
469
470
471
472#ifndef IR_DISABLE
473
474 if (!no_handshake && ohci_readl (ohci,
475 &ohci->regs->control) & OHCI_CTRL_IR) {
476 u32 temp;
477
478 ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n");
479
480
481
482
483
484 temp = 500;
485
486 ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable);
487 ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus);
488 while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) {
489 msleep (10);
490 if (--temp == 0) {
491 ohci_err (ohci, "USB HC takeover failed!"
492 " (BIOS/SMM bug)\n");
493 return -EBUSY;
494 }
495 }
496 ohci_usb_reset (ohci);
497 }
498#endif
499
500
501 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
502
503
504 if (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_RWC)
505 ohci->hc_control |= OHCI_CTRL_RWC;
506
507
508 if (ohci->num_ports == 0)
509 ohci->num_ports = roothub_a(ohci) & RH_A_NDP;
510
511 if (ohci->hcca)
512 return 0;
513
514 timer_setup(&ohci->io_watchdog, io_watchdog_func, 0);
515 ohci->prev_frame_no = IO_WATCHDOG_OFF;
516
517 if (hcd->localmem_pool)
518 ohci->hcca = gen_pool_dma_alloc_align(hcd->localmem_pool,
519 sizeof(*ohci->hcca),
520 &ohci->hcca_dma, 256);
521 else
522 ohci->hcca = dma_alloc_coherent(hcd->self.controller,
523 sizeof(*ohci->hcca),
524 &ohci->hcca_dma,
525 GFP_KERNEL);
526 if (!ohci->hcca)
527 return -ENOMEM;
528
529 if ((ret = ohci_mem_init (ohci)) < 0)
530 ohci_stop (hcd);
531 else {
532 create_debug_files (ohci);
533 }
534
535 return ret;
536}
537
538
539
540
541
542
543
544static int ohci_run (struct ohci_hcd *ohci)
545{
546 u32 mask, val;
547 int first = ohci->fminterval == 0;
548 struct usb_hcd *hcd = ohci_to_hcd(ohci);
549
550 ohci->rh_state = OHCI_RH_HALTED;
551
552
553 if (first) {
554
555 val = ohci_readl (ohci, &ohci->regs->fminterval);
556 ohci->fminterval = val & 0x3fff;
557 if (ohci->fminterval != FI)
558 ohci_dbg (ohci, "fminterval delta %d\n",
559 ohci->fminterval - FI);
560 ohci->fminterval |= FSMP (ohci->fminterval) << 16;
561
562 }
563
564
565
566
567
568
569
570 if ((ohci->hc_control & OHCI_CTRL_RWC) != 0)
571 device_set_wakeup_capable(hcd->self.controller, 1);
572
573 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
574 case OHCI_USB_OPER:
575 val = 0;
576 break;
577 case OHCI_USB_SUSPEND:
578 case OHCI_USB_RESUME:
579 ohci->hc_control &= OHCI_CTRL_RWC;
580 ohci->hc_control |= OHCI_USB_RESUME;
581 val = 10 ;
582 break;
583
584 default:
585 ohci->hc_control &= OHCI_CTRL_RWC;
586 ohci->hc_control |= OHCI_USB_RESET;
587 val = 50 ;
588 break;
589 }
590 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
591
592 (void) ohci_readl (ohci, &ohci->regs->control);
593 msleep(val);
594
595 memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
596
597
598 spin_lock_irq (&ohci->lock);
599
600retry:
601
602 ohci_writel (ohci, OHCI_HCR, &ohci->regs->cmdstatus);
603 val = 30;
604 while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
605 if (--val == 0) {
606 spin_unlock_irq (&ohci->lock);
607 ohci_err (ohci, "USB HC reset timed out!\n");
608 return -1;
609 }
610 udelay (1);
611 }
612
613
614
615
616
617
618
619
620
621
622 if (ohci->flags & OHCI_QUIRK_INITRESET) {
623 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
624
625 (void) ohci_readl (ohci, &ohci->regs->control);
626 }
627
628
629
630 ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
631 ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
632
633
634 ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
635
636 periodic_reinit (ohci);
637
638
639
640
641 if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
642 || !ohci_readl (ohci, &ohci->regs->periodicstart)) {
643 if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
644 ohci->flags |= OHCI_QUIRK_INITRESET;
645 ohci_dbg (ohci, "enabling initreset quirk\n");
646 goto retry;
647 }
648 spin_unlock_irq (&ohci->lock);
649 ohci_err (ohci, "init err (%08x %04x)\n",
650 ohci_readl (ohci, &ohci->regs->fminterval),
651 ohci_readl (ohci, &ohci->regs->periodicstart));
652 return -EOVERFLOW;
653 }
654
655
656 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
657 hcd->uses_new_polling = 1;
658
659
660 ohci->hc_control &= OHCI_CTRL_RWC;
661 ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
662 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
663 ohci->rh_state = OHCI_RH_RUNNING;
664
665
666 ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
667
668
669 mask = OHCI_INTR_INIT;
670 ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
671 ohci_writel (ohci, mask, &ohci->regs->intrenable);
672
673
674 val = roothub_a (ohci);
675
676 val &= ~RH_A_NOCP;
677 val |= RH_A_OCPM;
678 if (ohci->flags & OHCI_QUIRK_SUPERIO) {
679
680
681
682 val |= RH_A_NOCP;
683 val &= ~(RH_A_POTPGT | RH_A_NPS | RH_A_PSM | RH_A_OCPM);
684 } else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
685 (ohci->flags & OHCI_QUIRK_HUB_POWER)) {
686
687
688
689 val |= RH_A_NPS;
690 }
691 ohci_writel(ohci, val, &ohci->regs->roothub.a);
692
693 ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
694 ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
695 &ohci->regs->roothub.b);
696
697 (void) ohci_readl (ohci, &ohci->regs->control);
698
699 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
700 spin_unlock_irq (&ohci->lock);
701
702
703 mdelay ((val >> 23) & 0x1fe);
704
705 ohci_dump(ohci);
706
707 return 0;
708}
709
710
711
712int ohci_setup(struct usb_hcd *hcd)
713{
714 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
715
716 ohci_hcd_init(ohci);
717
718 return ohci_init(ohci);
719}
720EXPORT_SYMBOL_GPL(ohci_setup);
721
722
723static int ohci_start(struct usb_hcd *hcd)
724{
725 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
726 int ret;
727
728 ret = ohci_run(ohci);
729 if (ret < 0) {
730 ohci_err(ohci, "can't start\n");
731 ohci_stop(hcd);
732 }
733 return ret;
734}
735
736
737
738
739
740
741
742
743
744
745
746
747
748static void io_watchdog_func(struct timer_list *t)
749{
750 struct ohci_hcd *ohci = from_timer(ohci, t, io_watchdog);
751 bool takeback_all_pending = false;
752 u32 status;
753 u32 head;
754 struct ed *ed;
755 struct td *td, *td_start, *td_next;
756 unsigned frame_no, prev_frame_no = IO_WATCHDOG_OFF;
757 unsigned long flags;
758
759 spin_lock_irqsave(&ohci->lock, flags);
760
761
762
763
764
765
766
767
768 status = ohci_readl(ohci, &ohci->regs->intrstatus);
769 if (!(status & OHCI_INTR_WDH) && ohci->wdh_cnt == ohci->prev_wdh_cnt) {
770 if (ohci->prev_donehead) {
771 ohci_err(ohci, "HcDoneHead not written back; disabled\n");
772 died:
773 usb_hc_died(ohci_to_hcd(ohci));
774 ohci_dump(ohci);
775 _ohci_shutdown(ohci_to_hcd(ohci));
776 goto done;
777 } else {
778
779 takeback_all_pending = true;
780 }
781 }
782
783
784 list_for_each_entry(ed, &ohci->eds_in_use, in_use_list) {
785 if (ed->pending_td) {
786 if (takeback_all_pending ||
787 OKAY_TO_TAKEBACK(ohci, ed)) {
788 unsigned tmp = hc32_to_cpu(ohci, ed->hwINFO);
789
790 ohci_dbg(ohci, "takeback pending TD for dev %d ep 0x%x\n",
791 0x007f & tmp,
792 (0x000f & (tmp >> 7)) +
793 ((tmp & ED_IN) >> 5));
794 add_to_done_list(ohci, ed->pending_td);
795 }
796 }
797
798
799 td = ed->pending_td;
800
801
802 if (!td) {
803 list_for_each_entry(td_next, &ed->td_list, td_list) {
804 if (!td_next->next_dl_td)
805 break;
806 td = td_next;
807 }
808 }
809
810
811 head = hc32_to_cpu(ohci, READ_ONCE(ed->hwHeadP)) & TD_MASK;
812 td_start = td;
813 td_next = list_prepare_entry(td, &ed->td_list, td_list);
814 list_for_each_entry_continue(td_next, &ed->td_list, td_list) {
815 if (head == (u32) td_next->td_dma)
816 break;
817 td = td_next;
818 }
819 if (td != td_start) {
820
821
822
823
824
825 ed->takeback_wdh_cnt = ohci->wdh_cnt + 2;
826 ed->pending_td = td;
827 }
828 }
829
830 ohci_work(ohci);
831
832 if (ohci->rh_state == OHCI_RH_RUNNING) {
833
834
835
836
837
838
839
840
841
842 frame_no = ohci_frame_no(ohci);
843 if (frame_no == ohci->prev_frame_no) {
844 int active_cnt = 0;
845 int i;
846 unsigned tmp;
847
848 for (i = 0; i < ohci->num_ports; ++i) {
849 tmp = roothub_portstatus(ohci, i);
850
851 if ((tmp & RH_PS_PES) && !(tmp & RH_PS_PSS))
852 ++active_cnt;
853 }
854
855 if (active_cnt > 0) {
856 ohci_err(ohci, "frame counter not updating; disabled\n");
857 goto died;
858 }
859 }
860 if (!list_empty(&ohci->eds_in_use)) {
861 prev_frame_no = frame_no;
862 ohci->prev_wdh_cnt = ohci->wdh_cnt;
863 ohci->prev_donehead = ohci_readl(ohci,
864 &ohci->regs->donehead);
865 mod_timer(&ohci->io_watchdog,
866 jiffies + IO_WATCHDOG_DELAY);
867 }
868 }
869
870 done:
871 ohci->prev_frame_no = prev_frame_no;
872 spin_unlock_irqrestore(&ohci->lock, flags);
873}
874
875
876
877static irqreturn_t ohci_irq (struct usb_hcd *hcd)
878{
879 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
880 struct ohci_regs __iomem *regs = ohci->regs;
881 int ints;
882
883
884
885
886
887 ints = ohci_readl(ohci, ®s->intrstatus);
888
889
890
891
892 if (ints == ~(u32)0) {
893 ohci->rh_state = OHCI_RH_HALTED;
894 ohci_dbg (ohci, "device removed!\n");
895 usb_hc_died(hcd);
896 return IRQ_HANDLED;
897 }
898
899
900 ints &= ohci_readl(ohci, ®s->intrenable);
901
902
903 if (ints == 0 || unlikely(ohci->rh_state == OHCI_RH_HALTED))
904 return IRQ_NOTMINE;
905
906 if (ints & OHCI_INTR_UE) {
907
908 if (quirk_nec(ohci)) {
909
910
911
912 ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
913
914 ohci_writel (ohci, OHCI_INTR_UE, ®s->intrdisable);
915
916 schedule_work (&ohci->nec_work);
917 } else {
918 ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
919 ohci->rh_state = OHCI_RH_HALTED;
920 usb_hc_died(hcd);
921 }
922
923 ohci_dump(ohci);
924 ohci_usb_reset (ohci);
925 }
926
927 if (ints & OHCI_INTR_RHSC) {
928 ohci_dbg(ohci, "rhsc\n");
929 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
930 ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
931 ®s->intrstatus);
932
933
934
935
936
937
938
939
940
941 ohci_writel(ohci, OHCI_INTR_RHSC, ®s->intrdisable);
942 usb_hcd_poll_rh_status(hcd);
943 }
944
945
946
947
948
949 else if (ints & OHCI_INTR_RD) {
950 ohci_dbg(ohci, "resume detect\n");
951 ohci_writel(ohci, OHCI_INTR_RD, ®s->intrstatus);
952 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
953 if (ohci->autostop) {
954 spin_lock (&ohci->lock);
955 ohci_rh_resume (ohci);
956 spin_unlock (&ohci->lock);
957 } else
958 usb_hcd_resume_root_hub(hcd);
959 }
960
961 spin_lock(&ohci->lock);
962 if (ints & OHCI_INTR_WDH)
963 update_done_list(ohci);
964
965
966
967
968
969
970 ohci_work(ohci);
971 if ((ints & OHCI_INTR_SF) != 0 && !ohci->ed_rm_list
972 && ohci->rh_state == OHCI_RH_RUNNING)
973 ohci_writel (ohci, OHCI_INTR_SF, ®s->intrdisable);
974
975 if (ohci->rh_state == OHCI_RH_RUNNING) {
976 ohci_writel (ohci, ints, ®s->intrstatus);
977 if (ints & OHCI_INTR_WDH)
978 ++ohci->wdh_cnt;
979
980 ohci_writel (ohci, OHCI_INTR_MIE, ®s->intrenable);
981
982 (void) ohci_readl (ohci, &ohci->regs->control);
983 }
984 spin_unlock(&ohci->lock);
985
986 return IRQ_HANDLED;
987}
988
989
990
991static void ohci_stop (struct usb_hcd *hcd)
992{
993 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
994
995 ohci_dump(ohci);
996
997 if (quirk_nec(ohci))
998 flush_work(&ohci->nec_work);
999 del_timer_sync(&ohci->io_watchdog);
1000 ohci->prev_frame_no = IO_WATCHDOG_OFF;
1001
1002 ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
1003 ohci_usb_reset(ohci);
1004 free_irq(hcd->irq, hcd);
1005 hcd->irq = 0;
1006
1007 if (quirk_amdiso(ohci))
1008 usb_amd_dev_put();
1009
1010 remove_debug_files (ohci);
1011 ohci_mem_cleanup (ohci);
1012 if (ohci->hcca) {
1013 if (hcd->localmem_pool)
1014 gen_pool_free(hcd->localmem_pool,
1015 (unsigned long)ohci->hcca,
1016 sizeof(*ohci->hcca));
1017 else
1018 dma_free_coherent(hcd->self.controller,
1019 sizeof(*ohci->hcca),
1020 ohci->hcca, ohci->hcca_dma);
1021 ohci->hcca = NULL;
1022 ohci->hcca_dma = 0;
1023 }
1024}
1025
1026
1027
1028#if defined(CONFIG_PM) || defined(CONFIG_USB_PCI)
1029
1030
1031int ohci_restart(struct ohci_hcd *ohci)
1032{
1033 int temp;
1034 int i;
1035 struct urb_priv *priv;
1036
1037 ohci_init(ohci);
1038 spin_lock_irq(&ohci->lock);
1039 ohci->rh_state = OHCI_RH_HALTED;
1040
1041
1042 if (!list_empty (&ohci->pending))
1043 ohci_dbg(ohci, "abort schedule...\n");
1044 list_for_each_entry (priv, &ohci->pending, pending) {
1045 struct urb *urb = priv->td[0]->urb;
1046 struct ed *ed = priv->ed;
1047
1048 switch (ed->state) {
1049 case ED_OPER:
1050 ed->state = ED_UNLINK;
1051 ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
1052 ed_deschedule (ohci, ed);
1053
1054 ed->ed_next = ohci->ed_rm_list;
1055 ed->ed_prev = NULL;
1056 ohci->ed_rm_list = ed;
1057 fallthrough;
1058 case ED_UNLINK:
1059 break;
1060 default:
1061 ohci_dbg(ohci, "bogus ed %p state %d\n",
1062 ed, ed->state);
1063 }
1064
1065 if (!urb->unlinked)
1066 urb->unlinked = -ESHUTDOWN;
1067 }
1068 ohci_work(ohci);
1069 spin_unlock_irq(&ohci->lock);
1070
1071
1072
1073
1074 for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
1075 for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
1076
1077
1078 ohci->ed_rm_list = NULL;
1079
1080
1081 ohci->ed_controltail = NULL;
1082 ohci->ed_bulktail = NULL;
1083
1084 if ((temp = ohci_run (ohci)) < 0) {
1085 ohci_err (ohci, "can't restart, %d\n", temp);
1086 return temp;
1087 }
1088 ohci_dbg(ohci, "restart complete\n");
1089 return 0;
1090}
1091EXPORT_SYMBOL_GPL(ohci_restart);
1092
1093#endif
1094
1095#ifdef CONFIG_PM
1096
1097int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
1098{
1099 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
1100 unsigned long flags;
1101 int rc = 0;
1102
1103
1104
1105
1106
1107 spin_lock_irqsave (&ohci->lock, flags);
1108 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
1109 (void)ohci_readl(ohci, &ohci->regs->intrdisable);
1110
1111 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1112 spin_unlock_irqrestore (&ohci->lock, flags);
1113
1114 synchronize_irq(hcd->irq);
1115
1116 if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
1117 ohci_resume(hcd, false);
1118 rc = -EBUSY;
1119 }
1120 return rc;
1121}
1122EXPORT_SYMBOL_GPL(ohci_suspend);
1123
1124
1125int ohci_resume(struct usb_hcd *hcd, bool hibernated)
1126{
1127 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
1128 int port;
1129 bool need_reinit = false;
1130
1131 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1132
1133
1134 if (hibernated)
1135 ohci_usb_reset(ohci);
1136
1137
1138 ohci->hc_control = ohci_readl(ohci, &ohci->regs->control);
1139 if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
1140 need_reinit = true;
1141 } else {
1142 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
1143 case OHCI_USB_OPER:
1144 case OHCI_USB_RESET:
1145 need_reinit = true;
1146 }
1147 }
1148
1149
1150 if (need_reinit) {
1151 spin_lock_irq(&ohci->lock);
1152 ohci_rh_resume(ohci);
1153 ohci_rh_suspend(ohci, 0);
1154 spin_unlock_irq(&ohci->lock);
1155 }
1156
1157
1158 else {
1159 ohci_dbg(ohci, "powerup ports\n");
1160 for (port = 0; port < ohci->num_ports; port++)
1161 ohci_writel(ohci, RH_PS_PPS,
1162 &ohci->regs->roothub.portstatus[port]);
1163
1164 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrenable);
1165 ohci_readl(ohci, &ohci->regs->intrenable);
1166 msleep(20);
1167 }
1168
1169 usb_hcd_resume_root_hub(hcd);
1170
1171 return 0;
1172}
1173EXPORT_SYMBOL_GPL(ohci_resume);
1174
1175#endif
1176
1177
1178
1179
1180
1181
1182
1183
1184static const struct hc_driver ohci_hc_driver = {
1185 .description = hcd_name,
1186 .product_desc = "OHCI Host Controller",
1187 .hcd_priv_size = sizeof(struct ohci_hcd),
1188
1189
1190
1191
1192 .irq = ohci_irq,
1193 .flags = HCD_MEMORY | HCD_DMA | HCD_USB11,
1194
1195
1196
1197
1198 .reset = ohci_setup,
1199 .start = ohci_start,
1200 .stop = ohci_stop,
1201 .shutdown = ohci_shutdown,
1202
1203
1204
1205
1206 .urb_enqueue = ohci_urb_enqueue,
1207 .urb_dequeue = ohci_urb_dequeue,
1208 .endpoint_disable = ohci_endpoint_disable,
1209
1210
1211
1212
1213 .get_frame_number = ohci_get_frame,
1214
1215
1216
1217
1218 .hub_status_data = ohci_hub_status_data,
1219 .hub_control = ohci_hub_control,
1220#ifdef CONFIG_PM
1221 .bus_suspend = ohci_bus_suspend,
1222 .bus_resume = ohci_bus_resume,
1223#endif
1224 .start_port_reset = ohci_start_port_reset,
1225};
1226
1227void ohci_init_driver(struct hc_driver *drv,
1228 const struct ohci_driver_overrides *over)
1229{
1230
1231 *drv = ohci_hc_driver;
1232
1233 if (over) {
1234 drv->product_desc = over->product_desc;
1235 drv->hcd_priv_size += over->extra_priv_size;
1236 if (over->reset)
1237 drv->reset = over->reset;
1238 }
1239}
1240EXPORT_SYMBOL_GPL(ohci_init_driver);
1241
1242
1243
1244MODULE_AUTHOR (DRIVER_AUTHOR);
1245MODULE_DESCRIPTION(DRIVER_DESC);
1246MODULE_LICENSE ("GPL");
1247
1248#if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
1249#include "ohci-sa1111.c"
1250#define SA1111_DRIVER ohci_hcd_sa1111_driver
1251#endif
1252
1253#ifdef CONFIG_USB_OHCI_HCD_PPC_OF
1254#include "ohci-ppc-of.c"
1255#define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
1256#endif
1257
1258#ifdef CONFIG_PPC_PS3
1259#include "ohci-ps3.c"
1260#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
1261#endif
1262
1263#ifdef CONFIG_MFD_SM501
1264#include "ohci-sm501.c"
1265#define SM501_OHCI_DRIVER ohci_hcd_sm501_driver
1266#endif
1267
1268#ifdef CONFIG_MFD_TC6393XB
1269#include "ohci-tmio.c"
1270#define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver
1271#endif
1272
1273static int __init ohci_hcd_mod_init(void)
1274{
1275 int retval = 0;
1276
1277 if (usb_disabled())
1278 return -ENODEV;
1279
1280 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1281 pr_debug ("%s: block sizes: ed %zd td %zd\n", hcd_name,
1282 sizeof (struct ed), sizeof (struct td));
1283 set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1284
1285 ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root);
1286
1287#ifdef PS3_SYSTEM_BUS_DRIVER
1288 retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1289 if (retval < 0)
1290 goto error_ps3;
1291#endif
1292
1293#ifdef OF_PLATFORM_DRIVER
1294 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
1295 if (retval < 0)
1296 goto error_of_platform;
1297#endif
1298
1299#ifdef SA1111_DRIVER
1300 retval = sa1111_driver_register(&SA1111_DRIVER);
1301 if (retval < 0)
1302 goto error_sa1111;
1303#endif
1304
1305#ifdef SM501_OHCI_DRIVER
1306 retval = platform_driver_register(&SM501_OHCI_DRIVER);
1307 if (retval < 0)
1308 goto error_sm501;
1309#endif
1310
1311#ifdef TMIO_OHCI_DRIVER
1312 retval = platform_driver_register(&TMIO_OHCI_DRIVER);
1313 if (retval < 0)
1314 goto error_tmio;
1315#endif
1316
1317 return retval;
1318
1319
1320#ifdef TMIO_OHCI_DRIVER
1321 platform_driver_unregister(&TMIO_OHCI_DRIVER);
1322 error_tmio:
1323#endif
1324#ifdef SM501_OHCI_DRIVER
1325 platform_driver_unregister(&SM501_OHCI_DRIVER);
1326 error_sm501:
1327#endif
1328#ifdef SA1111_DRIVER
1329 sa1111_driver_unregister(&SA1111_DRIVER);
1330 error_sa1111:
1331#endif
1332#ifdef OF_PLATFORM_DRIVER
1333 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1334 error_of_platform:
1335#endif
1336#ifdef PS3_SYSTEM_BUS_DRIVER
1337 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1338 error_ps3:
1339#endif
1340 debugfs_remove(ohci_debug_root);
1341 ohci_debug_root = NULL;
1342
1343 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1344 return retval;
1345}
1346module_init(ohci_hcd_mod_init);
1347
1348static void __exit ohci_hcd_mod_exit(void)
1349{
1350#ifdef TMIO_OHCI_DRIVER
1351 platform_driver_unregister(&TMIO_OHCI_DRIVER);
1352#endif
1353#ifdef SM501_OHCI_DRIVER
1354 platform_driver_unregister(&SM501_OHCI_DRIVER);
1355#endif
1356#ifdef SA1111_DRIVER
1357 sa1111_driver_unregister(&SA1111_DRIVER);
1358#endif
1359#ifdef OF_PLATFORM_DRIVER
1360 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1361#endif
1362#ifdef PS3_SYSTEM_BUS_DRIVER
1363 ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1364#endif
1365 debugfs_remove(ohci_debug_root);
1366 clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
1367}
1368module_exit(ohci_hcd_mod_exit);
1369
1370