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23#include <linux/module.h>
24#include <linux/pci.h>
25#include <linux/dmapool.h>
26#include <linux/kernel.h>
27#include <linux/delay.h>
28#include <linux/ioport.h>
29#include <linux/sched.h>
30#include <linux/vmalloc.h>
31#include <linux/errno.h>
32#include <linux/init.h>
33#include <linux/hrtimer.h>
34#include <linux/list.h>
35#include <linux/interrupt.h>
36#include <linux/usb.h>
37#include <linux/usb/hcd.h>
38#include <linux/moduleparam.h>
39#include <linux/dma-mapping.h>
40#include <linux/debugfs.h>
41#include <linux/slab.h>
42
43#include <asm/byteorder.h>
44#include <asm/io.h>
45#include <asm/irq.h>
46#include <asm/unaligned.h>
47
48#if defined(CONFIG_PPC_PS3)
49#include <asm/firmware.h>
50#endif
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68#define DRIVER_AUTHOR "David Brownell"
69#define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver"
70
71static const char hcd_name [] = "ehci_hcd";
72
73
74#undef EHCI_URB_TRACE
75
76
77#define EHCI_TUNE_CERR 3
78#define EHCI_TUNE_RL_HS 4
79#define EHCI_TUNE_RL_TT 0
80#define EHCI_TUNE_MULT_HS 1
81#define EHCI_TUNE_MULT_TT 1
82
83
84
85
86
87
88#define EHCI_TUNE_FLS 1
89
90
91static int log2_irq_thresh = 0;
92module_param (log2_irq_thresh, int, S_IRUGO);
93MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
94
95
96static unsigned park = 0;
97module_param (park, uint, S_IRUGO);
98MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets");
99
100
101static bool ignore_oc;
102module_param (ignore_oc, bool, S_IRUGO);
103MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
104
105#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
106
107
108
109#include "ehci.h"
110#include "pci-quirks.h"
111
112static void compute_tt_budget(u8 budget_table[EHCI_BANDWIDTH_SIZE],
113 struct ehci_tt *tt);
114
115
116
117
118
119
120
121
122static unsigned ehci_moschip_read_frame_index(struct ehci_hcd *ehci)
123{
124 unsigned uf;
125
126 uf = ehci_readl(ehci, &ehci->regs->frame_index);
127 if (unlikely((uf & 7) == 0))
128 uf = ehci_readl(ehci, &ehci->regs->frame_index);
129 return uf;
130}
131
132static inline unsigned ehci_read_frame_index(struct ehci_hcd *ehci)
133{
134 if (ehci->frame_index_bug)
135 return ehci_moschip_read_frame_index(ehci);
136 return ehci_readl(ehci, &ehci->regs->frame_index);
137}
138
139#include "ehci-dbg.c"
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
161 u32 mask, u32 done, int usec)
162{
163 u32 result;
164
165 do {
166 result = ehci_readl(ehci, ptr);
167 if (result == ~(u32)0)
168 return -ENODEV;
169 result &= mask;
170 if (result == done)
171 return 0;
172 udelay (1);
173 usec--;
174 } while (usec > 0);
175 return -ETIMEDOUT;
176}
177EXPORT_SYMBOL_GPL(ehci_handshake);
178
179
180static int tdi_in_host_mode (struct ehci_hcd *ehci)
181{
182 u32 tmp;
183
184 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
185 return (tmp & 3) == USBMODE_CM_HC;
186}
187
188
189
190
191
192static int ehci_halt (struct ehci_hcd *ehci)
193{
194 u32 temp;
195
196 spin_lock_irq(&ehci->lock);
197
198
199 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
200
201 if (ehci_is_TDI(ehci) && !tdi_in_host_mode(ehci)) {
202 spin_unlock_irq(&ehci->lock);
203 return 0;
204 }
205
206
207
208
209
210 ehci->command &= ~CMD_RUN;
211 temp = ehci_readl(ehci, &ehci->regs->command);
212 temp &= ~(CMD_RUN | CMD_IAAD);
213 ehci_writel(ehci, temp, &ehci->regs->command);
214
215 spin_unlock_irq(&ehci->lock);
216 synchronize_irq(ehci_to_hcd(ehci)->irq);
217
218 return ehci_handshake(ehci, &ehci->regs->status,
219 STS_HALT, STS_HALT, 16 * 125);
220}
221
222
223static void tdi_reset (struct ehci_hcd *ehci)
224{
225 u32 tmp;
226
227 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
228 tmp |= USBMODE_CM_HC;
229
230
231
232
233 if (ehci_big_endian_mmio(ehci))
234 tmp |= USBMODE_BE;
235 ehci_writel(ehci, tmp, &ehci->regs->usbmode);
236}
237
238
239
240
241
242int ehci_reset(struct ehci_hcd *ehci)
243{
244 int retval;
245 u32 command = ehci_readl(ehci, &ehci->regs->command);
246
247
248
249 if (ehci->debug && !dbgp_reset_prep(ehci_to_hcd(ehci)))
250 ehci->debug = NULL;
251
252 command |= CMD_RESET;
253 dbg_cmd (ehci, "reset", command);
254 ehci_writel(ehci, command, &ehci->regs->command);
255 ehci->rh_state = EHCI_RH_HALTED;
256 ehci->next_statechange = jiffies;
257 retval = ehci_handshake(ehci, &ehci->regs->command,
258 CMD_RESET, 0, 250 * 1000);
259
260 if (ehci->has_hostpc) {
261 ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS,
262 &ehci->regs->usbmode_ex);
263 ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning);
264 }
265 if (retval)
266 return retval;
267
268 if (ehci_is_TDI(ehci))
269 tdi_reset (ehci);
270
271 if (ehci->debug)
272 dbgp_external_startup(ehci_to_hcd(ehci));
273
274 ehci->port_c_suspend = ehci->suspended_ports =
275 ehci->resuming_ports = 0;
276 return retval;
277}
278EXPORT_SYMBOL_GPL(ehci_reset);
279
280
281
282
283
284static void ehci_quiesce (struct ehci_hcd *ehci)
285{
286 u32 temp;
287
288 if (ehci->rh_state != EHCI_RH_RUNNING)
289 return;
290
291
292 temp = (ehci->command << 10) & (STS_ASS | STS_PSS);
293 ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp,
294 16 * 125);
295
296
297 spin_lock_irq(&ehci->lock);
298 ehci->command &= ~(CMD_ASE | CMD_PSE);
299 ehci_writel(ehci, ehci->command, &ehci->regs->command);
300 spin_unlock_irq(&ehci->lock);
301
302
303 ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0,
304 16 * 125);
305}
306
307
308
309static void end_iaa_cycle(struct ehci_hcd *ehci);
310static void end_unlink_async(struct ehci_hcd *ehci);
311static void unlink_empty_async(struct ehci_hcd *ehci);
312static void ehci_work(struct ehci_hcd *ehci);
313static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
314static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
315static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable);
316
317#include "ehci-timer.c"
318#include "ehci-hub.c"
319#include "ehci-mem.c"
320#include "ehci-q.c"
321#include "ehci-sched.c"
322#include "ehci-sysfs.c"
323
324
325
326
327
328
329
330static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
331{
332 int port = HCS_N_PORTS(ehci->hcs_params);
333
334 while (port--) {
335 ehci_writel(ehci, PORT_RWC_BITS,
336 &ehci->regs->port_status[port]);
337 spin_unlock_irq(&ehci->lock);
338 ehci_port_power(ehci, port, false);
339 spin_lock_irq(&ehci->lock);
340 }
341}
342
343
344
345
346
347static void ehci_silence_controller(struct ehci_hcd *ehci)
348{
349 ehci_halt(ehci);
350
351 spin_lock_irq(&ehci->lock);
352 ehci->rh_state = EHCI_RH_HALTED;
353 ehci_turn_off_all_ports(ehci);
354
355
356 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
357
358
359 ehci_readl(ehci, &ehci->regs->configured_flag);
360 spin_unlock_irq(&ehci->lock);
361}
362
363
364
365
366
367static void ehci_shutdown(struct usb_hcd *hcd)
368{
369 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
370
371 spin_lock_irq(&ehci->lock);
372 ehci->shutdown = true;
373 ehci->rh_state = EHCI_RH_STOPPING;
374 ehci->enabled_hrtimer_events = 0;
375 spin_unlock_irq(&ehci->lock);
376
377 ehci_silence_controller(ehci);
378
379 hrtimer_cancel(&ehci->hrtimer);
380}
381
382
383
384
385
386
387
388static void ehci_work (struct ehci_hcd *ehci)
389{
390
391
392
393
394 if (ehci->scanning) {
395 ehci->need_rescan = true;
396 return;
397 }
398 ehci->scanning = true;
399
400 rescan:
401 ehci->need_rescan = false;
402 if (ehci->async_count)
403 scan_async(ehci);
404 if (ehci->intr_count > 0)
405 scan_intr(ehci);
406 if (ehci->isoc_count > 0)
407 scan_isoc(ehci);
408 if (ehci->need_rescan)
409 goto rescan;
410 ehci->scanning = false;
411
412
413
414
415
416 turn_on_io_watchdog(ehci);
417}
418
419
420
421
422static void ehci_stop (struct usb_hcd *hcd)
423{
424 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
425
426 ehci_dbg (ehci, "stop\n");
427
428
429
430 spin_lock_irq(&ehci->lock);
431 ehci->enabled_hrtimer_events = 0;
432 spin_unlock_irq(&ehci->lock);
433
434 ehci_quiesce(ehci);
435 ehci_silence_controller(ehci);
436 ehci_reset (ehci);
437
438 hrtimer_cancel(&ehci->hrtimer);
439 remove_sysfs_files(ehci);
440 remove_debug_files (ehci);
441
442
443 spin_lock_irq (&ehci->lock);
444 end_free_itds(ehci);
445 spin_unlock_irq (&ehci->lock);
446 ehci_mem_cleanup (ehci);
447
448 if (ehci->amd_pll_fix == 1)
449 usb_amd_dev_put();
450
451 dbg_status (ehci, "ehci_stop completed",
452 ehci_readl(ehci, &ehci->regs->status));
453}
454
455
456static int ehci_init(struct usb_hcd *hcd)
457{
458 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
459 u32 temp;
460 int retval;
461 u32 hcc_params;
462 struct ehci_qh_hw *hw;
463
464 spin_lock_init(&ehci->lock);
465
466
467
468
469 ehci->need_io_watchdog = 1;
470
471 hrtimer_init(&ehci->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
472 ehci->hrtimer.function = ehci_hrtimer_func;
473 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
474
475 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
476
477
478
479
480
481 ehci->uframe_periodic_max = 100;
482
483
484
485
486
487 ehci->periodic_size = DEFAULT_I_TDPS;
488 INIT_LIST_HEAD(&ehci->async_unlink);
489 INIT_LIST_HEAD(&ehci->async_idle);
490 INIT_LIST_HEAD(&ehci->intr_unlink_wait);
491 INIT_LIST_HEAD(&ehci->intr_unlink);
492 INIT_LIST_HEAD(&ehci->intr_qh_list);
493 INIT_LIST_HEAD(&ehci->cached_itd_list);
494 INIT_LIST_HEAD(&ehci->cached_sitd_list);
495 INIT_LIST_HEAD(&ehci->tt_list);
496
497 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
498
499 switch (EHCI_TUNE_FLS) {
500 case 0: ehci->periodic_size = 1024; break;
501 case 1: ehci->periodic_size = 512; break;
502 case 2: ehci->periodic_size = 256; break;
503 default: BUG();
504 }
505 }
506 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
507 return retval;
508
509
510 if (HCC_ISOC_CACHE(hcc_params))
511 ehci->i_thresh = 0;
512 else
513 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
514
515
516
517
518
519
520
521
522 ehci->async->qh_next.qh = NULL;
523 hw = ehci->async->hw;
524 hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
525 hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
526#if defined(CONFIG_PPC_PS3)
527 hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE);
528#endif
529 hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
530 hw->hw_qtd_next = EHCI_LIST_END(ehci);
531 ehci->async->qh_state = QH_STATE_LINKED;
532 hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
533
534
535 if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
536 log2_irq_thresh = 0;
537 temp = 1 << (16 + log2_irq_thresh);
538 if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
539 ehci->has_ppcd = 1;
540 ehci_dbg(ehci, "enable per-port change event\n");
541 temp |= CMD_PPCEE;
542 }
543 if (HCC_CANPARK(hcc_params)) {
544
545
546
547
548
549
550
551 if (park) {
552 park = min(park, (unsigned) 3);
553 temp |= CMD_PARK;
554 temp |= park << 8;
555 }
556 ehci_dbg(ehci, "park %d\n", park);
557 }
558 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
559
560 temp &= ~(3 << 2);
561 temp |= (EHCI_TUNE_FLS << 2);
562 }
563 ehci->command = temp;
564
565
566 if (!(hcd->driver->flags & HCD_LOCAL_MEM))
567 hcd->self.sg_tablesize = ~0;
568
569
570 ehci->old_current = ~0;
571 return 0;
572}
573
574
575static int ehci_run (struct usb_hcd *hcd)
576{
577 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
578 u32 temp;
579 u32 hcc_params;
580
581 hcd->uses_new_polling = 1;
582
583
584
585 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
586 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
587
588
589
590
591
592
593
594
595
596
597
598
599
600 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
601 if (HCC_64BIT_ADDR(hcc_params)) {
602 ehci_writel(ehci, 0, &ehci->regs->segment);
603#if 0
604
605 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
606 ehci_info(ehci, "enabled 64bit DMA\n");
607#endif
608 }
609
610
611
612
613 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
614 ehci->command |= CMD_RUN;
615 ehci_writel(ehci, ehci->command, &ehci->regs->command);
616 dbg_cmd (ehci, "init", ehci->command);
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632 down_write(&ehci_cf_port_reset_rwsem);
633 ehci->rh_state = EHCI_RH_RUNNING;
634 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
635 ehci_readl(ehci, &ehci->regs->command);
636 msleep(5);
637 up_write(&ehci_cf_port_reset_rwsem);
638 ehci->last_periodic_enable = ktime_get_real();
639
640 temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
641 ehci_info (ehci,
642 "USB %x.%x started, EHCI %x.%02x%s\n",
643 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
644 temp >> 8, temp & 0xff,
645 ignore_oc ? ", overcurrent ignored" : "");
646
647 ehci_writel(ehci, INTR_MASK,
648 &ehci->regs->intr_enable);
649
650
651
652
653
654 create_debug_files(ehci);
655 create_sysfs_files(ehci);
656
657 return 0;
658}
659
660int ehci_setup(struct usb_hcd *hcd)
661{
662 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
663 int retval;
664
665 ehci->regs = (void __iomem *)ehci->caps +
666 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
667 dbg_hcs_params(ehci, "reset");
668 dbg_hcc_params(ehci, "reset");
669
670
671 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
672
673 ehci->sbrn = HCD_USB2;
674
675
676 retval = ehci_init(hcd);
677 if (retval)
678 return retval;
679
680 retval = ehci_halt(ehci);
681 if (retval) {
682 ehci_mem_cleanup(ehci);
683 return retval;
684 }
685
686 ehci_reset(ehci);
687
688 return 0;
689}
690EXPORT_SYMBOL_GPL(ehci_setup);
691
692
693
694static irqreturn_t ehci_irq (struct usb_hcd *hcd)
695{
696 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
697 u32 status, masked_status, pcd_status = 0, cmd;
698 int bh;
699 unsigned long flags;
700
701
702
703
704
705
706
707 spin_lock_irqsave(&ehci->lock, flags);
708
709 status = ehci_readl(ehci, &ehci->regs->status);
710
711
712 if (status == ~(u32) 0) {
713 ehci_dbg (ehci, "device removed\n");
714 goto dead;
715 }
716
717
718
719
720
721 masked_status = status & (INTR_MASK | STS_FLR);
722
723
724 if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) {
725 spin_unlock_irqrestore(&ehci->lock, flags);
726 return IRQ_NONE;
727 }
728
729
730 ehci_writel(ehci, masked_status, &ehci->regs->status);
731 cmd = ehci_readl(ehci, &ehci->regs->command);
732 bh = 0;
733
734
735 if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
736 if (likely ((status & STS_ERR) == 0))
737 COUNT (ehci->stats.normal);
738 else
739 COUNT (ehci->stats.error);
740 bh = 1;
741 }
742
743
744 if (status & STS_IAA) {
745
746
747 ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_IAA_WATCHDOG);
748
749
750
751
752
753
754
755
756 if (ehci->next_hrtimer_event == EHCI_HRTIMER_IAA_WATCHDOG)
757 ++ehci->next_hrtimer_event;
758
759
760 if (cmd & CMD_IAAD)
761 ehci_dbg(ehci, "IAA with IAAD still set?\n");
762 if (ehci->iaa_in_progress)
763 COUNT(ehci->stats.iaa);
764 end_iaa_cycle(ehci);
765 }
766
767
768 if (status & STS_PCD) {
769 unsigned i = HCS_N_PORTS (ehci->hcs_params);
770 u32 ppcd = ~0;
771
772
773 pcd_status = status;
774
775
776 if (ehci->rh_state == EHCI_RH_SUSPENDED)
777 usb_hcd_resume_root_hub(hcd);
778
779
780 if (ehci->has_ppcd)
781 ppcd = status >> 16;
782
783 while (i--) {
784 int pstatus;
785
786
787 if (!(ppcd & (1 << i)))
788 continue;
789 pstatus = ehci_readl(ehci,
790 &ehci->regs->port_status[i]);
791
792 if (pstatus & PORT_OWNER)
793 continue;
794 if (!(test_bit(i, &ehci->suspended_ports) &&
795 ((pstatus & PORT_RESUME) ||
796 !(pstatus & PORT_SUSPEND)) &&
797 (pstatus & PORT_PE) &&
798 ehci->reset_done[i] == 0))
799 continue;
800
801
802
803
804
805 ehci->reset_done[i] = jiffies +
806 msecs_to_jiffies(USB_RESUME_TIMEOUT);
807 set_bit(i, &ehci->resuming_ports);
808 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
809 usb_hcd_start_port_resume(&hcd->self, i);
810 mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
811 }
812 }
813
814
815 if (unlikely ((status & STS_FATAL) != 0)) {
816 ehci_err(ehci, "fatal error\n");
817 dbg_cmd(ehci, "fatal", cmd);
818 dbg_status(ehci, "fatal", status);
819dead:
820 usb_hc_died(hcd);
821
822
823 ehci->shutdown = true;
824 ehci->rh_state = EHCI_RH_STOPPING;
825 ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE);
826 ehci_writel(ehci, ehci->command, &ehci->regs->command);
827 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
828 ehci_handle_controller_death(ehci);
829
830
831 bh = 0;
832 }
833
834 if (bh)
835 ehci_work (ehci);
836 spin_unlock_irqrestore(&ehci->lock, flags);
837 if (pcd_status)
838 usb_hcd_poll_rh_status(hcd);
839 return IRQ_HANDLED;
840}
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856static int ehci_urb_enqueue (
857 struct usb_hcd *hcd,
858 struct urb *urb,
859 gfp_t mem_flags
860) {
861 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
862 struct list_head qtd_list;
863
864 INIT_LIST_HEAD (&qtd_list);
865
866 switch (usb_pipetype (urb->pipe)) {
867 case PIPE_CONTROL:
868
869
870
871 if (urb->transfer_buffer_length > (16 * 1024))
872 return -EMSGSIZE;
873
874
875 default:
876 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
877 return -ENOMEM;
878 return submit_async(ehci, urb, &qtd_list, mem_flags);
879
880 case PIPE_INTERRUPT:
881 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
882 return -ENOMEM;
883 return intr_submit(ehci, urb, &qtd_list, mem_flags);
884
885 case PIPE_ISOCHRONOUS:
886 if (urb->dev->speed == USB_SPEED_HIGH)
887 return itd_submit (ehci, urb, mem_flags);
888 else
889 return sitd_submit (ehci, urb, mem_flags);
890 }
891}
892
893
894
895
896
897static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
898{
899 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
900 struct ehci_qh *qh;
901 unsigned long flags;
902 int rc;
903
904 spin_lock_irqsave (&ehci->lock, flags);
905 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
906 if (rc)
907 goto done;
908
909 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
910
911
912
913
914
915 } else {
916 qh = (struct ehci_qh *) urb->hcpriv;
917 qh->unlink_reason |= QH_UNLINK_REQUESTED;
918 switch (qh->qh_state) {
919 case QH_STATE_LINKED:
920 if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)
921 start_unlink_intr(ehci, qh);
922 else
923 start_unlink_async(ehci, qh);
924 break;
925 case QH_STATE_COMPLETING:
926 qh->dequeue_during_giveback = 1;
927 break;
928 case QH_STATE_UNLINK:
929 case QH_STATE_UNLINK_WAIT:
930
931 break;
932 case QH_STATE_IDLE:
933
934 qh_completions(ehci, qh);
935 break;
936 }
937 }
938done:
939 spin_unlock_irqrestore (&ehci->lock, flags);
940 return rc;
941}
942
943
944
945
946
947static void
948ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
949{
950 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
951 unsigned long flags;
952 struct ehci_qh *qh;
953
954
955
956
957rescan:
958 spin_lock_irqsave (&ehci->lock, flags);
959 qh = ep->hcpriv;
960 if (!qh)
961 goto done;
962
963
964
965
966 if (qh->hw == NULL) {
967 struct ehci_iso_stream *stream = ep->hcpriv;
968
969 if (!list_empty(&stream->td_list))
970 goto idle_timeout;
971
972
973 reserve_release_iso_bandwidth(ehci, stream, -1);
974 kfree(stream);
975 goto done;
976 }
977
978 qh->unlink_reason |= QH_UNLINK_REQUESTED;
979 switch (qh->qh_state) {
980 case QH_STATE_LINKED:
981 if (list_empty(&qh->qtd_list))
982 qh->unlink_reason |= QH_UNLINK_QUEUE_EMPTY;
983 else
984 WARN_ON(1);
985 if (usb_endpoint_type(&ep->desc) != USB_ENDPOINT_XFER_INT)
986 start_unlink_async(ehci, qh);
987 else
988 start_unlink_intr(ehci, qh);
989
990 case QH_STATE_COMPLETING:
991 case QH_STATE_UNLINK:
992 case QH_STATE_UNLINK_WAIT:
993idle_timeout:
994 spin_unlock_irqrestore (&ehci->lock, flags);
995 schedule_timeout_uninterruptible(1);
996 goto rescan;
997 case QH_STATE_IDLE:
998 if (qh->clearing_tt)
999 goto idle_timeout;
1000 if (list_empty (&qh->qtd_list)) {
1001 if (qh->ps.bw_uperiod)
1002 reserve_release_intr_bandwidth(ehci, qh, -1);
1003 qh_destroy(ehci, qh);
1004 break;
1005 }
1006
1007 default:
1008
1009
1010
1011 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1012 qh, ep->desc.bEndpointAddress, qh->qh_state,
1013 list_empty (&qh->qtd_list) ? "" : "(has tds)");
1014 break;
1015 }
1016 done:
1017 ep->hcpriv = NULL;
1018 spin_unlock_irqrestore (&ehci->lock, flags);
1019}
1020
1021static void
1022ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1023{
1024 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1025 struct ehci_qh *qh;
1026 int eptype = usb_endpoint_type(&ep->desc);
1027 int epnum = usb_endpoint_num(&ep->desc);
1028 int is_out = usb_endpoint_dir_out(&ep->desc);
1029 unsigned long flags;
1030
1031 if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1032 return;
1033
1034 spin_lock_irqsave(&ehci->lock, flags);
1035 qh = ep->hcpriv;
1036
1037
1038
1039
1040
1041
1042 if (qh) {
1043 if (!list_empty(&qh->qtd_list)) {
1044 WARN_ONCE(1, "clear_halt for a busy endpoint\n");
1045 } else {
1046
1047
1048
1049
1050 usb_settoggle(qh->ps.udev, epnum, is_out, 0);
1051 qh->unlink_reason |= QH_UNLINK_REQUESTED;
1052 if (eptype == USB_ENDPOINT_XFER_BULK)
1053 start_unlink_async(ehci, qh);
1054 else
1055 start_unlink_intr(ehci, qh);
1056 }
1057 }
1058 spin_unlock_irqrestore(&ehci->lock, flags);
1059}
1060
1061static int ehci_get_frame (struct usb_hcd *hcd)
1062{
1063 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
1064 return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size;
1065}
1066
1067
1068
1069
1070
1071static void ehci_remove_device(struct usb_hcd *hcd, struct usb_device *udev)
1072{
1073 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1074
1075 spin_lock_irq(&ehci->lock);
1076 drop_tt(udev);
1077 spin_unlock_irq(&ehci->lock);
1078}
1079
1080
1081
1082#ifdef CONFIG_PM
1083
1084
1085
1086
1087
1088int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup)
1089{
1090 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1091
1092 if (time_before(jiffies, ehci->next_statechange))
1093 msleep(10);
1094
1095
1096
1097
1098
1099
1100 ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
1101
1102 spin_lock_irq(&ehci->lock);
1103 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
1104 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
1105
1106 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1107 spin_unlock_irq(&ehci->lock);
1108
1109 synchronize_irq(hcd->irq);
1110
1111
1112 if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
1113 ehci_resume(hcd, false);
1114 return -EBUSY;
1115 }
1116
1117 return 0;
1118}
1119EXPORT_SYMBOL_GPL(ehci_suspend);
1120
1121
1122int ehci_resume(struct usb_hcd *hcd, bool force_reset)
1123{
1124 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1125
1126 if (time_before(jiffies, ehci->next_statechange))
1127 msleep(100);
1128
1129
1130 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1131
1132 if (ehci->shutdown)
1133 return 0;
1134
1135
1136
1137
1138
1139
1140 if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
1141 !force_reset) {
1142 int mask = INTR_MASK;
1143
1144 ehci_prepare_ports_for_controller_resume(ehci);
1145
1146 spin_lock_irq(&ehci->lock);
1147 if (ehci->shutdown)
1148 goto skip;
1149
1150 if (!hcd->self.root_hub->do_remote_wakeup)
1151 mask &= ~STS_PCD;
1152 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
1153 ehci_readl(ehci, &ehci->regs->intr_enable);
1154 skip:
1155 spin_unlock_irq(&ehci->lock);
1156 return 0;
1157 }
1158
1159
1160
1161
1162
1163 usb_root_hub_lost_power(hcd->self.root_hub);
1164 (void) ehci_halt(ehci);
1165 (void) ehci_reset(ehci);
1166
1167 spin_lock_irq(&ehci->lock);
1168 if (ehci->shutdown)
1169 goto skip;
1170
1171 ehci_writel(ehci, ehci->command, &ehci->regs->command);
1172 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
1173 ehci_readl(ehci, &ehci->regs->command);
1174
1175 ehci->rh_state = EHCI_RH_SUSPENDED;
1176 spin_unlock_irq(&ehci->lock);
1177
1178 return 1;
1179}
1180EXPORT_SYMBOL_GPL(ehci_resume);
1181
1182#endif
1183
1184
1185
1186
1187
1188
1189
1190
1191static const struct hc_driver ehci_hc_driver = {
1192 .description = hcd_name,
1193 .product_desc = "EHCI Host Controller",
1194 .hcd_priv_size = sizeof(struct ehci_hcd),
1195
1196
1197
1198
1199 .irq = ehci_irq,
1200 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
1201
1202
1203
1204
1205 .reset = ehci_setup,
1206 .start = ehci_run,
1207 .stop = ehci_stop,
1208 .shutdown = ehci_shutdown,
1209
1210
1211
1212
1213 .urb_enqueue = ehci_urb_enqueue,
1214 .urb_dequeue = ehci_urb_dequeue,
1215 .endpoint_disable = ehci_endpoint_disable,
1216 .endpoint_reset = ehci_endpoint_reset,
1217 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
1218
1219
1220
1221
1222 .get_frame_number = ehci_get_frame,
1223
1224
1225
1226
1227 .hub_status_data = ehci_hub_status_data,
1228 .hub_control = ehci_hub_control,
1229 .bus_suspend = ehci_bus_suspend,
1230 .bus_resume = ehci_bus_resume,
1231 .relinquish_port = ehci_relinquish_port,
1232 .port_handed_over = ehci_port_handed_over,
1233
1234
1235
1236
1237 .free_dev = ehci_remove_device,
1238};
1239
1240void ehci_init_driver(struct hc_driver *drv,
1241 const struct ehci_driver_overrides *over)
1242{
1243
1244 *drv = ehci_hc_driver;
1245
1246 if (over) {
1247 drv->hcd_priv_size += over->extra_priv_size;
1248 if (over->reset)
1249 drv->reset = over->reset;
1250 if (over->port_power)
1251 drv->port_power = over->port_power;
1252 }
1253}
1254EXPORT_SYMBOL_GPL(ehci_init_driver);
1255
1256
1257
1258MODULE_DESCRIPTION(DRIVER_DESC);
1259MODULE_AUTHOR (DRIVER_AUTHOR);
1260MODULE_LICENSE ("GPL");
1261
1262#ifdef CONFIG_USB_EHCI_SH
1263#include "ehci-sh.c"
1264#define PLATFORM_DRIVER ehci_hcd_sh_driver
1265#endif
1266
1267#ifdef CONFIG_PPC_PS3
1268#include "ehci-ps3.c"
1269#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
1270#endif
1271
1272#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1273#include "ehci-ppc-of.c"
1274#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver
1275#endif
1276
1277#ifdef CONFIG_XPS_USB_HCD_XILINX
1278#include "ehci-xilinx-of.c"
1279#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
1280#endif
1281
1282#ifdef CONFIG_TILE_USB
1283#include "ehci-tilegx.c"
1284#define PLATFORM_DRIVER ehci_hcd_tilegx_driver
1285#endif
1286
1287#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
1288#include "ehci-pmcmsp.c"
1289#define PLATFORM_DRIVER ehci_hcd_msp_driver
1290#endif
1291
1292#ifdef CONFIG_SPARC_LEON
1293#include "ehci-grlib.c"
1294#define PLATFORM_DRIVER ehci_grlib_driver
1295#endif
1296
1297#ifdef CONFIG_USB_EHCI_MV
1298#include "ehci-mv.c"
1299#define PLATFORM_DRIVER ehci_mv_driver
1300#endif
1301
1302#ifdef CONFIG_MIPS_SEAD3
1303#include "ehci-sead3.c"
1304#define PLATFORM_DRIVER ehci_hcd_sead3_driver
1305#endif
1306
1307static int __init ehci_hcd_init(void)
1308{
1309 int retval = 0;
1310
1311 if (usb_disabled())
1312 return -ENODEV;
1313
1314 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1315 set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1316 if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1317 test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1318 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1319 " before uhci_hcd and ohci_hcd, not after\n");
1320
1321 pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
1322 hcd_name,
1323 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1324 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1325
1326#ifdef CONFIG_DYNAMIC_DEBUG
1327 ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
1328 if (!ehci_debug_root) {
1329 retval = -ENOENT;
1330 goto err_debug;
1331 }
1332#endif
1333
1334#ifdef PLATFORM_DRIVER
1335 retval = platform_driver_register(&PLATFORM_DRIVER);
1336 if (retval < 0)
1337 goto clean0;
1338#endif
1339
1340#ifdef PS3_SYSTEM_BUS_DRIVER
1341 retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1342 if (retval < 0)
1343 goto clean2;
1344#endif
1345
1346#ifdef OF_PLATFORM_DRIVER
1347 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
1348 if (retval < 0)
1349 goto clean3;
1350#endif
1351
1352#ifdef XILINX_OF_PLATFORM_DRIVER
1353 retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER);
1354 if (retval < 0)
1355 goto clean4;
1356#endif
1357 return retval;
1358
1359#ifdef XILINX_OF_PLATFORM_DRIVER
1360
1361clean4:
1362#endif
1363#ifdef OF_PLATFORM_DRIVER
1364 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1365clean3:
1366#endif
1367#ifdef PS3_SYSTEM_BUS_DRIVER
1368 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1369clean2:
1370#endif
1371#ifdef PLATFORM_DRIVER
1372 platform_driver_unregister(&PLATFORM_DRIVER);
1373clean0:
1374#endif
1375#ifdef CONFIG_DYNAMIC_DEBUG
1376 debugfs_remove(ehci_debug_root);
1377 ehci_debug_root = NULL;
1378err_debug:
1379#endif
1380 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1381 return retval;
1382}
1383module_init(ehci_hcd_init);
1384
1385static void __exit ehci_hcd_cleanup(void)
1386{
1387#ifdef XILINX_OF_PLATFORM_DRIVER
1388 platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
1389#endif
1390#ifdef OF_PLATFORM_DRIVER
1391 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1392#endif
1393#ifdef PLATFORM_DRIVER
1394 platform_driver_unregister(&PLATFORM_DRIVER);
1395#endif
1396#ifdef PS3_SYSTEM_BUS_DRIVER
1397 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1398#endif
1399#ifdef CONFIG_DYNAMIC_DEBUG
1400 debugfs_remove(ehci_debug_root);
1401#endif
1402 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1403}
1404module_exit(ehci_hcd_cleanup);
1405