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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 spin_unlock_irq(&ehci->lock);
336 ehci_port_power(ehci, port, false);
337 spin_lock_irq(&ehci->lock);
338 ehci_writel(ehci, PORT_RWC_BITS,
339 &ehci->regs->port_status[port]);
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
372
373
374
375
376
377 if (!ehci->sbrn)
378 return;
379
380 spin_lock_irq(&ehci->lock);
381 ehci->shutdown = true;
382 ehci->rh_state = EHCI_RH_STOPPING;
383 ehci->enabled_hrtimer_events = 0;
384 spin_unlock_irq(&ehci->lock);
385
386 ehci_silence_controller(ehci);
387
388 hrtimer_cancel(&ehci->hrtimer);
389}
390
391
392
393
394
395
396
397static void ehci_work (struct ehci_hcd *ehci)
398{
399
400
401
402
403 if (ehci->scanning) {
404 ehci->need_rescan = true;
405 return;
406 }
407 ehci->scanning = true;
408
409 rescan:
410 ehci->need_rescan = false;
411 if (ehci->async_count)
412 scan_async(ehci);
413 if (ehci->intr_count > 0)
414 scan_intr(ehci);
415 if (ehci->isoc_count > 0)
416 scan_isoc(ehci);
417 if (ehci->need_rescan)
418 goto rescan;
419 ehci->scanning = false;
420
421
422
423
424
425 turn_on_io_watchdog(ehci);
426}
427
428
429
430
431static void ehci_stop (struct usb_hcd *hcd)
432{
433 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
434
435 ehci_dbg (ehci, "stop\n");
436
437
438
439 spin_lock_irq(&ehci->lock);
440 ehci->enabled_hrtimer_events = 0;
441 spin_unlock_irq(&ehci->lock);
442
443 ehci_quiesce(ehci);
444 ehci_silence_controller(ehci);
445 ehci_reset (ehci);
446
447 hrtimer_cancel(&ehci->hrtimer);
448 remove_sysfs_files(ehci);
449 remove_debug_files (ehci);
450
451
452 spin_lock_irq (&ehci->lock);
453 end_free_itds(ehci);
454 spin_unlock_irq (&ehci->lock);
455 ehci_mem_cleanup (ehci);
456
457 if (ehci->amd_pll_fix == 1)
458 usb_amd_dev_put();
459
460 dbg_status (ehci, "ehci_stop completed",
461 ehci_readl(ehci, &ehci->regs->status));
462}
463
464
465static int ehci_init(struct usb_hcd *hcd)
466{
467 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
468 u32 temp;
469 int retval;
470 u32 hcc_params;
471 struct ehci_qh_hw *hw;
472
473 spin_lock_init(&ehci->lock);
474
475
476
477
478 ehci->need_io_watchdog = 1;
479
480 hrtimer_init(&ehci->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
481 ehci->hrtimer.function = ehci_hrtimer_func;
482 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
483
484 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
485
486
487
488
489
490 ehci->uframe_periodic_max = 100;
491
492
493
494
495
496 ehci->periodic_size = DEFAULT_I_TDPS;
497 INIT_LIST_HEAD(&ehci->async_unlink);
498 INIT_LIST_HEAD(&ehci->async_idle);
499 INIT_LIST_HEAD(&ehci->intr_unlink_wait);
500 INIT_LIST_HEAD(&ehci->intr_unlink);
501 INIT_LIST_HEAD(&ehci->intr_qh_list);
502 INIT_LIST_HEAD(&ehci->cached_itd_list);
503 INIT_LIST_HEAD(&ehci->cached_sitd_list);
504 INIT_LIST_HEAD(&ehci->tt_list);
505
506 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
507
508 switch (EHCI_TUNE_FLS) {
509 case 0: ehci->periodic_size = 1024; break;
510 case 1: ehci->periodic_size = 512; break;
511 case 2: ehci->periodic_size = 256; break;
512 default: BUG();
513 }
514 }
515 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
516 return retval;
517
518
519 if (HCC_ISOC_CACHE(hcc_params))
520 ehci->i_thresh = 0;
521 else
522 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
523
524
525
526
527
528
529
530
531 ehci->async->qh_next.qh = NULL;
532 hw = ehci->async->hw;
533 hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
534 hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
535#if defined(CONFIG_PPC_PS3)
536 hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE);
537#endif
538 hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
539 hw->hw_qtd_next = EHCI_LIST_END(ehci);
540 ehci->async->qh_state = QH_STATE_LINKED;
541 hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
542
543
544 if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
545 log2_irq_thresh = 0;
546 temp = 1 << (16 + log2_irq_thresh);
547 if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
548 ehci->has_ppcd = 1;
549 ehci_dbg(ehci, "enable per-port change event\n");
550 temp |= CMD_PPCEE;
551 }
552 if (HCC_CANPARK(hcc_params)) {
553
554
555
556
557
558
559
560 if (park) {
561 park = min(park, (unsigned) 3);
562 temp |= CMD_PARK;
563 temp |= park << 8;
564 }
565 ehci_dbg(ehci, "park %d\n", park);
566 }
567 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
568
569 temp &= ~(3 << 2);
570 temp |= (EHCI_TUNE_FLS << 2);
571 }
572 ehci->command = temp;
573
574
575 if (!(hcd->driver->flags & HCD_LOCAL_MEM))
576 hcd->self.sg_tablesize = ~0;
577
578
579 ehci->old_current = ~0;
580 return 0;
581}
582
583
584static int ehci_run (struct usb_hcd *hcd)
585{
586 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
587 u32 temp;
588 u32 hcc_params;
589
590 hcd->uses_new_polling = 1;
591
592
593
594 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
595 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
596
597
598
599
600
601
602
603
604
605
606
607
608
609 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
610 if (HCC_64BIT_ADDR(hcc_params)) {
611 ehci_writel(ehci, 0, &ehci->regs->segment);
612#if 0
613
614 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
615 ehci_info(ehci, "enabled 64bit DMA\n");
616#endif
617 }
618
619
620
621
622 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
623 ehci->command |= CMD_RUN;
624 ehci_writel(ehci, ehci->command, &ehci->regs->command);
625 dbg_cmd (ehci, "init", ehci->command);
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641 down_write(&ehci_cf_port_reset_rwsem);
642 ehci->rh_state = EHCI_RH_RUNNING;
643 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
644 ehci_readl(ehci, &ehci->regs->command);
645 msleep(5);
646 up_write(&ehci_cf_port_reset_rwsem);
647 ehci->last_periodic_enable = ktime_get_real();
648
649 temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
650 ehci_info (ehci,
651 "USB %x.%x started, EHCI %x.%02x%s\n",
652 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
653 temp >> 8, temp & 0xff,
654 ignore_oc ? ", overcurrent ignored" : "");
655
656 ehci_writel(ehci, INTR_MASK,
657 &ehci->regs->intr_enable);
658
659
660
661
662
663 create_debug_files(ehci);
664 create_sysfs_files(ehci);
665
666 return 0;
667}
668
669int ehci_setup(struct usb_hcd *hcd)
670{
671 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
672 int retval;
673
674 ehci->regs = (void __iomem *)ehci->caps +
675 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
676 dbg_hcs_params(ehci, "reset");
677 dbg_hcc_params(ehci, "reset");
678
679
680 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
681
682 ehci->sbrn = HCD_USB2;
683
684
685 retval = ehci_init(hcd);
686 if (retval)
687 return retval;
688
689 retval = ehci_halt(ehci);
690 if (retval) {
691 ehci_mem_cleanup(ehci);
692 return retval;
693 }
694
695 ehci_reset(ehci);
696
697 return 0;
698}
699EXPORT_SYMBOL_GPL(ehci_setup);
700
701
702
703static irqreturn_t ehci_irq (struct usb_hcd *hcd)
704{
705 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
706 u32 status, masked_status, pcd_status = 0, cmd;
707 int bh;
708 unsigned long flags;
709
710
711
712
713
714
715
716 spin_lock_irqsave(&ehci->lock, flags);
717
718 status = ehci_readl(ehci, &ehci->regs->status);
719
720
721 if (status == ~(u32) 0) {
722 ehci_dbg (ehci, "device removed\n");
723 goto dead;
724 }
725
726
727
728
729
730 masked_status = status & (INTR_MASK | STS_FLR);
731
732
733 if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) {
734 spin_unlock_irqrestore(&ehci->lock, flags);
735 return IRQ_NONE;
736 }
737
738
739 ehci_writel(ehci, masked_status, &ehci->regs->status);
740 cmd = ehci_readl(ehci, &ehci->regs->command);
741 bh = 0;
742
743
744 if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
745 if (likely ((status & STS_ERR) == 0))
746 COUNT (ehci->stats.normal);
747 else
748 COUNT (ehci->stats.error);
749 bh = 1;
750 }
751
752
753 if (status & STS_IAA) {
754
755
756 ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_IAA_WATCHDOG);
757
758
759
760
761
762
763
764
765 if (ehci->next_hrtimer_event == EHCI_HRTIMER_IAA_WATCHDOG)
766 ++ehci->next_hrtimer_event;
767
768
769 if (cmd & CMD_IAAD)
770 ehci_dbg(ehci, "IAA with IAAD still set?\n");
771 if (ehci->iaa_in_progress)
772 COUNT(ehci->stats.iaa);
773 end_iaa_cycle(ehci);
774 }
775
776
777 if (status & STS_PCD) {
778 unsigned i = HCS_N_PORTS (ehci->hcs_params);
779 u32 ppcd = ~0;
780
781
782 pcd_status = status;
783
784
785 if (ehci->rh_state == EHCI_RH_SUSPENDED)
786 usb_hcd_resume_root_hub(hcd);
787
788
789 if (ehci->has_ppcd)
790 ppcd = status >> 16;
791
792 while (i--) {
793 int pstatus;
794
795
796 if (!(ppcd & (1 << i)))
797 continue;
798 pstatus = ehci_readl(ehci,
799 &ehci->regs->port_status[i]);
800
801 if (pstatus & PORT_OWNER)
802 continue;
803 if (!(test_bit(i, &ehci->suspended_ports) &&
804 ((pstatus & PORT_RESUME) ||
805 !(pstatus & PORT_SUSPEND)) &&
806 (pstatus & PORT_PE) &&
807 ehci->reset_done[i] == 0))
808 continue;
809
810
811
812
813
814 ehci->reset_done[i] = jiffies +
815 msecs_to_jiffies(USB_RESUME_TIMEOUT);
816 set_bit(i, &ehci->resuming_ports);
817 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
818 usb_hcd_start_port_resume(&hcd->self, i);
819 mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
820 }
821 }
822
823
824 if (unlikely ((status & STS_FATAL) != 0)) {
825 ehci_err(ehci, "fatal error\n");
826 dbg_cmd(ehci, "fatal", cmd);
827 dbg_status(ehci, "fatal", status);
828dead:
829 usb_hc_died(hcd);
830
831
832 ehci->shutdown = true;
833 ehci->rh_state = EHCI_RH_STOPPING;
834 ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE);
835 ehci_writel(ehci, ehci->command, &ehci->regs->command);
836 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
837 ehci_handle_controller_death(ehci);
838
839
840 bh = 0;
841 }
842
843 if (bh)
844 ehci_work (ehci);
845 spin_unlock_irqrestore(&ehci->lock, flags);
846 if (pcd_status)
847 usb_hcd_poll_rh_status(hcd);
848 return IRQ_HANDLED;
849}
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865static int ehci_urb_enqueue (
866 struct usb_hcd *hcd,
867 struct urb *urb,
868 gfp_t mem_flags
869) {
870 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
871 struct list_head qtd_list;
872
873 INIT_LIST_HEAD (&qtd_list);
874
875 switch (usb_pipetype (urb->pipe)) {
876 case PIPE_CONTROL:
877
878
879
880 if (urb->transfer_buffer_length > (16 * 1024))
881 return -EMSGSIZE;
882
883
884 default:
885 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
886 return -ENOMEM;
887 return submit_async(ehci, urb, &qtd_list, mem_flags);
888
889 case PIPE_INTERRUPT:
890 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
891 return -ENOMEM;
892 return intr_submit(ehci, urb, &qtd_list, mem_flags);
893
894 case PIPE_ISOCHRONOUS:
895 if (urb->dev->speed == USB_SPEED_HIGH)
896 return itd_submit (ehci, urb, mem_flags);
897 else
898 return sitd_submit (ehci, urb, mem_flags);
899 }
900}
901
902
903
904
905
906static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
907{
908 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
909 struct ehci_qh *qh;
910 unsigned long flags;
911 int rc;
912
913 spin_lock_irqsave (&ehci->lock, flags);
914 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
915 if (rc)
916 goto done;
917
918 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
919
920
921
922
923
924 } else {
925 qh = (struct ehci_qh *) urb->hcpriv;
926 qh->unlink_reason |= QH_UNLINK_REQUESTED;
927 switch (qh->qh_state) {
928 case QH_STATE_LINKED:
929 if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)
930 start_unlink_intr(ehci, qh);
931 else
932 start_unlink_async(ehci, qh);
933 break;
934 case QH_STATE_COMPLETING:
935 qh->dequeue_during_giveback = 1;
936 break;
937 case QH_STATE_UNLINK:
938 case QH_STATE_UNLINK_WAIT:
939
940 break;
941 case QH_STATE_IDLE:
942
943 qh_completions(ehci, qh);
944 break;
945 }
946 }
947done:
948 spin_unlock_irqrestore (&ehci->lock, flags);
949 return rc;
950}
951
952
953
954
955
956static void
957ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
958{
959 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
960 unsigned long flags;
961 struct ehci_qh *qh;
962
963
964
965
966rescan:
967 spin_lock_irqsave (&ehci->lock, flags);
968 qh = ep->hcpriv;
969 if (!qh)
970 goto done;
971
972
973
974
975 if (qh->hw == NULL) {
976 struct ehci_iso_stream *stream = ep->hcpriv;
977
978 if (!list_empty(&stream->td_list))
979 goto idle_timeout;
980
981
982 reserve_release_iso_bandwidth(ehci, stream, -1);
983 kfree(stream);
984 goto done;
985 }
986
987 qh->unlink_reason |= QH_UNLINK_REQUESTED;
988 switch (qh->qh_state) {
989 case QH_STATE_LINKED:
990 if (list_empty(&qh->qtd_list))
991 qh->unlink_reason |= QH_UNLINK_QUEUE_EMPTY;
992 else
993 WARN_ON(1);
994 if (usb_endpoint_type(&ep->desc) != USB_ENDPOINT_XFER_INT)
995 start_unlink_async(ehci, qh);
996 else
997 start_unlink_intr(ehci, qh);
998
999 case QH_STATE_COMPLETING:
1000 case QH_STATE_UNLINK:
1001 case QH_STATE_UNLINK_WAIT:
1002idle_timeout:
1003 spin_unlock_irqrestore (&ehci->lock, flags);
1004 schedule_timeout_uninterruptible(1);
1005 goto rescan;
1006 case QH_STATE_IDLE:
1007 if (qh->clearing_tt)
1008 goto idle_timeout;
1009 if (list_empty (&qh->qtd_list)) {
1010 if (qh->ps.bw_uperiod)
1011 reserve_release_intr_bandwidth(ehci, qh, -1);
1012 qh_destroy(ehci, qh);
1013 break;
1014 }
1015
1016 default:
1017
1018
1019
1020 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1021 qh, ep->desc.bEndpointAddress, qh->qh_state,
1022 list_empty (&qh->qtd_list) ? "" : "(has tds)");
1023 break;
1024 }
1025 done:
1026 ep->hcpriv = NULL;
1027 spin_unlock_irqrestore (&ehci->lock, flags);
1028}
1029
1030static void
1031ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1032{
1033 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1034 struct ehci_qh *qh;
1035 int eptype = usb_endpoint_type(&ep->desc);
1036 int epnum = usb_endpoint_num(&ep->desc);
1037 int is_out = usb_endpoint_dir_out(&ep->desc);
1038 unsigned long flags;
1039
1040 if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1041 return;
1042
1043 spin_lock_irqsave(&ehci->lock, flags);
1044 qh = ep->hcpriv;
1045
1046
1047
1048
1049
1050
1051 if (qh) {
1052 if (!list_empty(&qh->qtd_list)) {
1053 WARN_ONCE(1, "clear_halt for a busy endpoint\n");
1054 } else {
1055
1056
1057
1058
1059 usb_settoggle(qh->ps.udev, epnum, is_out, 0);
1060 qh->unlink_reason |= QH_UNLINK_REQUESTED;
1061 if (eptype == USB_ENDPOINT_XFER_BULK)
1062 start_unlink_async(ehci, qh);
1063 else
1064 start_unlink_intr(ehci, qh);
1065 }
1066 }
1067 spin_unlock_irqrestore(&ehci->lock, flags);
1068}
1069
1070static int ehci_get_frame (struct usb_hcd *hcd)
1071{
1072 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
1073 return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size;
1074}
1075
1076
1077
1078
1079
1080static void ehci_remove_device(struct usb_hcd *hcd, struct usb_device *udev)
1081{
1082 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1083
1084 spin_lock_irq(&ehci->lock);
1085 drop_tt(udev);
1086 spin_unlock_irq(&ehci->lock);
1087}
1088
1089
1090
1091#ifdef CONFIG_PM
1092
1093
1094
1095
1096
1097int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup)
1098{
1099 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1100
1101 if (time_before(jiffies, ehci->next_statechange))
1102 msleep(10);
1103
1104
1105
1106
1107
1108
1109 ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
1110
1111 spin_lock_irq(&ehci->lock);
1112 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
1113 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
1114
1115 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1116 spin_unlock_irq(&ehci->lock);
1117
1118 synchronize_irq(hcd->irq);
1119
1120
1121 if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
1122 ehci_resume(hcd, false);
1123 return -EBUSY;
1124 }
1125
1126 return 0;
1127}
1128EXPORT_SYMBOL_GPL(ehci_suspend);
1129
1130
1131int ehci_resume(struct usb_hcd *hcd, bool force_reset)
1132{
1133 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1134
1135 if (time_before(jiffies, ehci->next_statechange))
1136 msleep(100);
1137
1138
1139 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1140
1141 if (ehci->shutdown)
1142 return 0;
1143
1144
1145
1146
1147
1148
1149 if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
1150 !force_reset) {
1151 int mask = INTR_MASK;
1152
1153 ehci_prepare_ports_for_controller_resume(ehci);
1154
1155 spin_lock_irq(&ehci->lock);
1156 if (ehci->shutdown)
1157 goto skip;
1158
1159 if (!hcd->self.root_hub->do_remote_wakeup)
1160 mask &= ~STS_PCD;
1161 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
1162 ehci_readl(ehci, &ehci->regs->intr_enable);
1163 skip:
1164 spin_unlock_irq(&ehci->lock);
1165 return 0;
1166 }
1167
1168
1169
1170
1171
1172 usb_root_hub_lost_power(hcd->self.root_hub);
1173 (void) ehci_halt(ehci);
1174 (void) ehci_reset(ehci);
1175
1176 spin_lock_irq(&ehci->lock);
1177 if (ehci->shutdown)
1178 goto skip;
1179
1180 ehci_writel(ehci, ehci->command, &ehci->regs->command);
1181 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
1182 ehci_readl(ehci, &ehci->regs->command);
1183
1184 ehci->rh_state = EHCI_RH_SUSPENDED;
1185 spin_unlock_irq(&ehci->lock);
1186
1187 return 1;
1188}
1189EXPORT_SYMBOL_GPL(ehci_resume);
1190
1191#endif
1192
1193
1194
1195
1196
1197
1198
1199
1200static const struct hc_driver ehci_hc_driver = {
1201 .description = hcd_name,
1202 .product_desc = "EHCI Host Controller",
1203 .hcd_priv_size = sizeof(struct ehci_hcd),
1204
1205
1206
1207
1208 .irq = ehci_irq,
1209 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
1210
1211
1212
1213
1214 .reset = ehci_setup,
1215 .start = ehci_run,
1216 .stop = ehci_stop,
1217 .shutdown = ehci_shutdown,
1218
1219
1220
1221
1222 .urb_enqueue = ehci_urb_enqueue,
1223 .urb_dequeue = ehci_urb_dequeue,
1224 .endpoint_disable = ehci_endpoint_disable,
1225 .endpoint_reset = ehci_endpoint_reset,
1226 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
1227
1228
1229
1230
1231 .get_frame_number = ehci_get_frame,
1232
1233
1234
1235
1236 .hub_status_data = ehci_hub_status_data,
1237 .hub_control = ehci_hub_control,
1238 .bus_suspend = ehci_bus_suspend,
1239 .bus_resume = ehci_bus_resume,
1240 .relinquish_port = ehci_relinquish_port,
1241 .port_handed_over = ehci_port_handed_over,
1242
1243
1244
1245
1246 .free_dev = ehci_remove_device,
1247};
1248
1249void ehci_init_driver(struct hc_driver *drv,
1250 const struct ehci_driver_overrides *over)
1251{
1252
1253 *drv = ehci_hc_driver;
1254
1255 if (over) {
1256 drv->hcd_priv_size += over->extra_priv_size;
1257 if (over->reset)
1258 drv->reset = over->reset;
1259 if (over->port_power)
1260 drv->port_power = over->port_power;
1261 }
1262}
1263EXPORT_SYMBOL_GPL(ehci_init_driver);
1264
1265
1266
1267MODULE_DESCRIPTION(DRIVER_DESC);
1268MODULE_AUTHOR (DRIVER_AUTHOR);
1269MODULE_LICENSE ("GPL");
1270
1271#ifdef CONFIG_USB_EHCI_SH
1272#include "ehci-sh.c"
1273#define PLATFORM_DRIVER ehci_hcd_sh_driver
1274#endif
1275
1276#ifdef CONFIG_PPC_PS3
1277#include "ehci-ps3.c"
1278#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
1279#endif
1280
1281#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1282#include "ehci-ppc-of.c"
1283#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver
1284#endif
1285
1286#ifdef CONFIG_XPS_USB_HCD_XILINX
1287#include "ehci-xilinx-of.c"
1288#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
1289#endif
1290
1291#ifdef CONFIG_TILE_USB
1292#include "ehci-tilegx.c"
1293#define PLATFORM_DRIVER ehci_hcd_tilegx_driver
1294#endif
1295
1296#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
1297#include "ehci-pmcmsp.c"
1298#define PLATFORM_DRIVER ehci_hcd_msp_driver
1299#endif
1300
1301#ifdef CONFIG_SPARC_LEON
1302#include "ehci-grlib.c"
1303#define PLATFORM_DRIVER ehci_grlib_driver
1304#endif
1305
1306#ifdef CONFIG_USB_EHCI_MV
1307#include "ehci-mv.c"
1308#define PLATFORM_DRIVER ehci_mv_driver
1309#endif
1310
1311static int __init ehci_hcd_init(void)
1312{
1313 int retval = 0;
1314
1315 if (usb_disabled())
1316 return -ENODEV;
1317
1318 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1319 set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1320 if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1321 test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1322 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1323 " before uhci_hcd and ohci_hcd, not after\n");
1324
1325 pr_debug("%s: block sizes: qh %zd qtd %zd itd %zd sitd %zd\n",
1326 hcd_name,
1327 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1328 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1329
1330#ifdef CONFIG_DYNAMIC_DEBUG
1331 ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
1332 if (!ehci_debug_root) {
1333 retval = -ENOENT;
1334 goto err_debug;
1335 }
1336#endif
1337
1338#ifdef PLATFORM_DRIVER
1339 retval = platform_driver_register(&PLATFORM_DRIVER);
1340 if (retval < 0)
1341 goto clean0;
1342#endif
1343
1344#ifdef PS3_SYSTEM_BUS_DRIVER
1345 retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1346 if (retval < 0)
1347 goto clean2;
1348#endif
1349
1350#ifdef OF_PLATFORM_DRIVER
1351 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
1352 if (retval < 0)
1353 goto clean3;
1354#endif
1355
1356#ifdef XILINX_OF_PLATFORM_DRIVER
1357 retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER);
1358 if (retval < 0)
1359 goto clean4;
1360#endif
1361 return retval;
1362
1363#ifdef XILINX_OF_PLATFORM_DRIVER
1364
1365clean4:
1366#endif
1367#ifdef OF_PLATFORM_DRIVER
1368 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1369clean3:
1370#endif
1371#ifdef PS3_SYSTEM_BUS_DRIVER
1372 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1373clean2:
1374#endif
1375#ifdef PLATFORM_DRIVER
1376 platform_driver_unregister(&PLATFORM_DRIVER);
1377clean0:
1378#endif
1379#ifdef CONFIG_DYNAMIC_DEBUG
1380 debugfs_remove(ehci_debug_root);
1381 ehci_debug_root = NULL;
1382err_debug:
1383#endif
1384 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1385 return retval;
1386}
1387module_init(ehci_hcd_init);
1388
1389static void __exit ehci_hcd_cleanup(void)
1390{
1391#ifdef XILINX_OF_PLATFORM_DRIVER
1392 platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
1393#endif
1394#ifdef OF_PLATFORM_DRIVER
1395 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1396#endif
1397#ifdef PLATFORM_DRIVER
1398 platform_driver_unregister(&PLATFORM_DRIVER);
1399#endif
1400#ifdef PS3_SYSTEM_BUS_DRIVER
1401 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1402#endif
1403#ifdef CONFIG_DYNAMIC_DEBUG
1404 debugfs_remove(ehci_debug_root);
1405#endif
1406 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1407}
1408module_exit(ehci_hcd_cleanup);
1409