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8
9
10#include <linux/module.h>
11#include <linux/pci.h>
12#include <linux/dmapool.h>
13#include <linux/kernel.h>
14#include <linux/delay.h>
15#include <linux/ioport.h>
16#include <linux/sched.h>
17#include <linux/vmalloc.h>
18#include <linux/errno.h>
19#include <linux/init.h>
20#include <linux/hrtimer.h>
21#include <linux/list.h>
22#include <linux/interrupt.h>
23#include <linux/usb.h>
24#include <linux/usb/hcd.h>
25#include <linux/usb/otg.h>
26#include <linux/moduleparam.h>
27#include <linux/dma-mapping.h>
28#include <linux/debugfs.h>
29#include <linux/slab.h>
30
31#include <asm/byteorder.h>
32#include <asm/io.h>
33#include <asm/irq.h>
34#include <asm/unaligned.h>
35
36#if defined(CONFIG_PPC_PS3)
37#include <asm/firmware.h>
38#endif
39
40
41
42
43
44
45
46
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48
49
50
51
52
53
54
55
56#define DRIVER_AUTHOR "David Brownell"
57#define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver"
58
59static const char hcd_name [] = "ehci_hcd";
60
61
62#undef EHCI_URB_TRACE
63
64
65#define EHCI_TUNE_CERR 3
66#define EHCI_TUNE_RL_HS 4
67#define EHCI_TUNE_RL_TT 0
68#define EHCI_TUNE_MULT_HS 1
69#define EHCI_TUNE_MULT_TT 1
70
71
72
73
74
75
76#define EHCI_TUNE_FLS 1
77
78
79static int log2_irq_thresh = 0;
80module_param (log2_irq_thresh, int, S_IRUGO);
81MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
82
83
84static unsigned park = 0;
85module_param (park, uint, S_IRUGO);
86MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets");
87
88
89static bool ignore_oc;
90module_param (ignore_oc, bool, S_IRUGO);
91MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
92
93#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
94
95
96
97#include "ehci.h"
98#include "pci-quirks.h"
99
100static void compute_tt_budget(u8 budget_table[EHCI_BANDWIDTH_SIZE],
101 struct ehci_tt *tt);
102
103
104
105
106
107
108
109
110static unsigned ehci_moschip_read_frame_index(struct ehci_hcd *ehci)
111{
112 unsigned uf;
113
114 uf = ehci_readl(ehci, &ehci->regs->frame_index);
115 if (unlikely((uf & 7) == 0))
116 uf = ehci_readl(ehci, &ehci->regs->frame_index);
117 return uf;
118}
119
120static inline unsigned ehci_read_frame_index(struct ehci_hcd *ehci)
121{
122 if (ehci->frame_index_bug)
123 return ehci_moschip_read_frame_index(ehci);
124 return ehci_readl(ehci, &ehci->regs->frame_index);
125}
126
127#include "ehci-dbg.c"
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
149 u32 mask, u32 done, int usec)
150{
151 u32 result;
152
153 do {
154 result = ehci_readl(ehci, ptr);
155 if (result == ~(u32)0)
156 return -ENODEV;
157 result &= mask;
158 if (result == done)
159 return 0;
160 udelay (1);
161 usec--;
162 } while (usec > 0);
163 return -ETIMEDOUT;
164}
165EXPORT_SYMBOL_GPL(ehci_handshake);
166
167
168static int tdi_in_host_mode (struct ehci_hcd *ehci)
169{
170 u32 tmp;
171
172 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
173 return (tmp & 3) == USBMODE_CM_HC;
174}
175
176
177
178
179
180static int ehci_halt (struct ehci_hcd *ehci)
181{
182 u32 temp;
183
184 spin_lock_irq(&ehci->lock);
185
186
187 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
188
189 if (ehci_is_TDI(ehci) && !tdi_in_host_mode(ehci)) {
190 spin_unlock_irq(&ehci->lock);
191 return 0;
192 }
193
194
195
196
197
198 ehci->command &= ~CMD_RUN;
199 temp = ehci_readl(ehci, &ehci->regs->command);
200 temp &= ~(CMD_RUN | CMD_IAAD);
201 ehci_writel(ehci, temp, &ehci->regs->command);
202
203 spin_unlock_irq(&ehci->lock);
204 synchronize_irq(ehci_to_hcd(ehci)->irq);
205
206 return ehci_handshake(ehci, &ehci->regs->status,
207 STS_HALT, STS_HALT, 16 * 125);
208}
209
210
211static void tdi_reset (struct ehci_hcd *ehci)
212{
213 u32 tmp;
214
215 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
216 tmp |= USBMODE_CM_HC;
217
218
219
220
221 if (ehci_big_endian_mmio(ehci))
222 tmp |= USBMODE_BE;
223 ehci_writel(ehci, tmp, &ehci->regs->usbmode);
224}
225
226
227
228
229
230int ehci_reset(struct ehci_hcd *ehci)
231{
232 int retval;
233 u32 command = ehci_readl(ehci, &ehci->regs->command);
234
235
236
237 if (ehci->debug && !dbgp_reset_prep(ehci_to_hcd(ehci)))
238 ehci->debug = NULL;
239
240 command |= CMD_RESET;
241 dbg_cmd (ehci, "reset", command);
242 ehci_writel(ehci, command, &ehci->regs->command);
243 ehci->rh_state = EHCI_RH_HALTED;
244 ehci->next_statechange = jiffies;
245 retval = ehci_handshake(ehci, &ehci->regs->command,
246 CMD_RESET, 0, 250 * 1000);
247
248 if (ehci->has_hostpc) {
249 ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS,
250 &ehci->regs->usbmode_ex);
251 ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning);
252 }
253 if (retval)
254 return retval;
255
256 if (ehci_is_TDI(ehci))
257 tdi_reset (ehci);
258
259 if (ehci->debug)
260 dbgp_external_startup(ehci_to_hcd(ehci));
261
262 ehci->port_c_suspend = ehci->suspended_ports =
263 ehci->resuming_ports = 0;
264 return retval;
265}
266EXPORT_SYMBOL_GPL(ehci_reset);
267
268
269
270
271
272static void ehci_quiesce (struct ehci_hcd *ehci)
273{
274 u32 temp;
275
276 if (ehci->rh_state != EHCI_RH_RUNNING)
277 return;
278
279
280 temp = (ehci->command << 10) & (STS_ASS | STS_PSS);
281 ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp,
282 16 * 125);
283
284
285 spin_lock_irq(&ehci->lock);
286 ehci->command &= ~(CMD_ASE | CMD_PSE);
287 ehci_writel(ehci, ehci->command, &ehci->regs->command);
288 spin_unlock_irq(&ehci->lock);
289
290
291 ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0,
292 16 * 125);
293}
294
295
296
297static void end_iaa_cycle(struct ehci_hcd *ehci);
298static void end_unlink_async(struct ehci_hcd *ehci);
299static void unlink_empty_async(struct ehci_hcd *ehci);
300static void ehci_work(struct ehci_hcd *ehci);
301static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
302static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
303static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable);
304
305#include "ehci-timer.c"
306#include "ehci-hub.c"
307#include "ehci-mem.c"
308#include "ehci-q.c"
309#include "ehci-sched.c"
310#include "ehci-sysfs.c"
311
312
313
314
315
316
317
318static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
319{
320 int port = HCS_N_PORTS(ehci->hcs_params);
321
322 while (port--) {
323 spin_unlock_irq(&ehci->lock);
324 ehci_port_power(ehci, port, false);
325 spin_lock_irq(&ehci->lock);
326 ehci_writel(ehci, PORT_RWC_BITS,
327 &ehci->regs->port_status[port]);
328 }
329}
330
331
332
333
334
335static void ehci_silence_controller(struct ehci_hcd *ehci)
336{
337 ehci_halt(ehci);
338
339 spin_lock_irq(&ehci->lock);
340 ehci->rh_state = EHCI_RH_HALTED;
341 ehci_turn_off_all_ports(ehci);
342
343
344 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
345
346
347 ehci_readl(ehci, &ehci->regs->configured_flag);
348 spin_unlock_irq(&ehci->lock);
349}
350
351
352
353
354
355static void ehci_shutdown(struct usb_hcd *hcd)
356{
357 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
358
359
360
361
362
363
364
365 if (!ehci->sbrn)
366 return;
367
368 spin_lock_irq(&ehci->lock);
369 ehci->shutdown = true;
370 ehci->rh_state = EHCI_RH_STOPPING;
371 ehci->enabled_hrtimer_events = 0;
372 spin_unlock_irq(&ehci->lock);
373
374 ehci_silence_controller(ehci);
375
376 hrtimer_cancel(&ehci->hrtimer);
377}
378
379
380
381
382
383
384
385static void ehci_work (struct ehci_hcd *ehci)
386{
387
388
389
390
391 if (ehci->scanning) {
392 ehci->need_rescan = true;
393 return;
394 }
395 ehci->scanning = true;
396
397 rescan:
398 ehci->need_rescan = false;
399 if (ehci->async_count)
400 scan_async(ehci);
401 if (ehci->intr_count > 0)
402 scan_intr(ehci);
403 if (ehci->isoc_count > 0)
404 scan_isoc(ehci);
405 if (ehci->need_rescan)
406 goto rescan;
407 ehci->scanning = false;
408
409
410
411
412
413 turn_on_io_watchdog(ehci);
414}
415
416
417
418
419static void ehci_stop (struct usb_hcd *hcd)
420{
421 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
422
423 ehci_dbg (ehci, "stop\n");
424
425
426
427 spin_lock_irq(&ehci->lock);
428 ehci->enabled_hrtimer_events = 0;
429 spin_unlock_irq(&ehci->lock);
430
431 ehci_quiesce(ehci);
432 ehci_silence_controller(ehci);
433 ehci_reset (ehci);
434
435 hrtimer_cancel(&ehci->hrtimer);
436 remove_sysfs_files(ehci);
437 remove_debug_files (ehci);
438
439
440 spin_lock_irq (&ehci->lock);
441 end_free_itds(ehci);
442 spin_unlock_irq (&ehci->lock);
443 ehci_mem_cleanup (ehci);
444
445 if (ehci->amd_pll_fix == 1)
446 usb_amd_dev_put();
447
448 dbg_status (ehci, "ehci_stop completed",
449 ehci_readl(ehci, &ehci->regs->status));
450}
451
452
453static int ehci_init(struct usb_hcd *hcd)
454{
455 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
456 u32 temp;
457 int retval;
458 u32 hcc_params;
459 struct ehci_qh_hw *hw;
460
461 spin_lock_init(&ehci->lock);
462
463
464
465
466 ehci->need_io_watchdog = 1;
467
468 hrtimer_init(&ehci->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
469 ehci->hrtimer.function = ehci_hrtimer_func;
470 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
471
472 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
473
474
475
476
477
478 ehci->uframe_periodic_max = 100;
479
480
481
482
483
484 ehci->periodic_size = DEFAULT_I_TDPS;
485 INIT_LIST_HEAD(&ehci->async_unlink);
486 INIT_LIST_HEAD(&ehci->async_idle);
487 INIT_LIST_HEAD(&ehci->intr_unlink_wait);
488 INIT_LIST_HEAD(&ehci->intr_unlink);
489 INIT_LIST_HEAD(&ehci->intr_qh_list);
490 INIT_LIST_HEAD(&ehci->cached_itd_list);
491 INIT_LIST_HEAD(&ehci->cached_sitd_list);
492 INIT_LIST_HEAD(&ehci->tt_list);
493
494 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
495
496 switch (EHCI_TUNE_FLS) {
497 case 0: ehci->periodic_size = 1024; break;
498 case 1: ehci->periodic_size = 512; break;
499 case 2: ehci->periodic_size = 256; break;
500 default: BUG();
501 }
502 }
503 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
504 return retval;
505
506
507 if (HCC_ISOC_CACHE(hcc_params))
508 ehci->i_thresh = 0;
509 else
510 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
511
512
513
514
515
516
517
518
519 ehci->async->qh_next.qh = NULL;
520 hw = ehci->async->hw;
521 hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
522 hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
523#if defined(CONFIG_PPC_PS3)
524 hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE);
525#endif
526 hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
527 hw->hw_qtd_next = EHCI_LIST_END(ehci);
528 ehci->async->qh_state = QH_STATE_LINKED;
529 hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
530
531
532 if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
533 log2_irq_thresh = 0;
534 temp = 1 << (16 + log2_irq_thresh);
535 if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
536 ehci->has_ppcd = 1;
537 ehci_dbg(ehci, "enable per-port change event\n");
538 temp |= CMD_PPCEE;
539 }
540 if (HCC_CANPARK(hcc_params)) {
541
542
543
544
545
546
547
548 if (park) {
549 park = min(park, (unsigned) 3);
550 temp |= CMD_PARK;
551 temp |= park << 8;
552 }
553 ehci_dbg(ehci, "park %d\n", park);
554 }
555 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
556
557 temp &= ~(3 << 2);
558 temp |= (EHCI_TUNE_FLS << 2);
559 }
560 ehci->command = temp;
561
562
563 if (!hcd->localmem_pool)
564 hcd->self.sg_tablesize = ~0;
565
566
567 ehci->old_current = ~0;
568 return 0;
569}
570
571
572static int ehci_run (struct usb_hcd *hcd)
573{
574 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
575 u32 temp;
576 u32 hcc_params;
577
578 hcd->uses_new_polling = 1;
579
580
581
582 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
583 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
584
585
586
587
588
589
590
591
592
593
594
595
596
597 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
598 if (HCC_64BIT_ADDR(hcc_params)) {
599 ehci_writel(ehci, 0, &ehci->regs->segment);
600#if 0
601
602 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
603 ehci_info(ehci, "enabled 64bit DMA\n");
604#endif
605 }
606
607
608
609
610 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
611 ehci->command |= CMD_RUN;
612 ehci_writel(ehci, ehci->command, &ehci->regs->command);
613 dbg_cmd (ehci, "init", ehci->command);
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629 down_write(&ehci_cf_port_reset_rwsem);
630 ehci->rh_state = EHCI_RH_RUNNING;
631 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
632 ehci_readl(ehci, &ehci->regs->command);
633 msleep(5);
634 up_write(&ehci_cf_port_reset_rwsem);
635 ehci->last_periodic_enable = ktime_get_real();
636
637 temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
638 ehci_info (ehci,
639 "USB %x.%x started, EHCI %x.%02x%s\n",
640 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
641 temp >> 8, temp & 0xff,
642 ignore_oc ? ", overcurrent ignored" : "");
643
644 ehci_writel(ehci, INTR_MASK,
645 &ehci->regs->intr_enable);
646
647
648
649
650
651 create_debug_files(ehci);
652 create_sysfs_files(ehci);
653
654 return 0;
655}
656
657int ehci_setup(struct usb_hcd *hcd)
658{
659 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
660 int retval;
661
662 ehci->regs = (void __iomem *)ehci->caps +
663 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
664 dbg_hcs_params(ehci, "reset");
665 dbg_hcc_params(ehci, "reset");
666
667
668 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
669
670 ehci->sbrn = HCD_USB2;
671
672
673 retval = ehci_init(hcd);
674 if (retval)
675 return retval;
676
677 retval = ehci_halt(ehci);
678 if (retval) {
679 ehci_mem_cleanup(ehci);
680 return retval;
681 }
682
683 ehci_reset(ehci);
684
685 return 0;
686}
687EXPORT_SYMBOL_GPL(ehci_setup);
688
689
690
691static irqreturn_t ehci_irq (struct usb_hcd *hcd)
692{
693 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
694 u32 status, masked_status, pcd_status = 0, cmd;
695 int bh;
696 unsigned long flags;
697
698
699
700
701
702
703
704 spin_lock_irqsave(&ehci->lock, flags);
705
706 status = ehci_readl(ehci, &ehci->regs->status);
707
708
709 if (status == ~(u32) 0) {
710 ehci_dbg (ehci, "device removed\n");
711 goto dead;
712 }
713
714
715
716
717
718 masked_status = status & (INTR_MASK | STS_FLR);
719
720
721 if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) {
722 spin_unlock_irqrestore(&ehci->lock, flags);
723 return IRQ_NONE;
724 }
725
726
727 ehci_writel(ehci, masked_status, &ehci->regs->status);
728 cmd = ehci_readl(ehci, &ehci->regs->command);
729 bh = 0;
730
731
732 if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
733 if (likely ((status & STS_ERR) == 0))
734 INCR(ehci->stats.normal);
735 else
736 INCR(ehci->stats.error);
737 bh = 1;
738 }
739
740
741 if (status & STS_IAA) {
742
743
744 ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_IAA_WATCHDOG);
745
746
747
748
749
750
751
752
753 if (ehci->next_hrtimer_event == EHCI_HRTIMER_IAA_WATCHDOG)
754 ++ehci->next_hrtimer_event;
755
756
757 if (cmd & CMD_IAAD)
758 ehci_dbg(ehci, "IAA with IAAD still set?\n");
759 if (ehci->iaa_in_progress)
760 INCR(ehci->stats.iaa);
761 end_iaa_cycle(ehci);
762 }
763
764
765 if (status & STS_PCD) {
766 unsigned i = HCS_N_PORTS (ehci->hcs_params);
767 u32 ppcd = ~0;
768
769
770 pcd_status = status;
771
772
773 if (ehci->rh_state == EHCI_RH_SUSPENDED)
774 usb_hcd_resume_root_hub(hcd);
775
776
777 if (ehci->has_ppcd)
778 ppcd = status >> 16;
779
780 while (i--) {
781 int pstatus;
782
783
784 if (!(ppcd & (1 << i)))
785 continue;
786 pstatus = ehci_readl(ehci,
787 &ehci->regs->port_status[i]);
788
789 if (pstatus & PORT_OWNER)
790 continue;
791 if (!(test_bit(i, &ehci->suspended_ports) &&
792 ((pstatus & PORT_RESUME) ||
793 !(pstatus & PORT_SUSPEND)) &&
794 (pstatus & PORT_PE) &&
795 ehci->reset_done[i] == 0))
796 continue;
797
798
799
800
801
802 ehci->reset_done[i] = jiffies +
803 msecs_to_jiffies(USB_RESUME_TIMEOUT);
804 set_bit(i, &ehci->resuming_ports);
805 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
806 usb_hcd_start_port_resume(&hcd->self, i);
807 mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
808 }
809 }
810
811
812 if (unlikely ((status & STS_FATAL) != 0)) {
813 ehci_err(ehci, "fatal error\n");
814 dbg_cmd(ehci, "fatal", cmd);
815 dbg_status(ehci, "fatal", status);
816dead:
817 usb_hc_died(hcd);
818
819
820 ehci->shutdown = true;
821 ehci->rh_state = EHCI_RH_STOPPING;
822 ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE);
823 ehci_writel(ehci, ehci->command, &ehci->regs->command);
824 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
825 ehci_handle_controller_death(ehci);
826
827
828 bh = 0;
829 }
830
831 if (bh)
832 ehci_work (ehci);
833 spin_unlock_irqrestore(&ehci->lock, flags);
834 if (pcd_status)
835 usb_hcd_poll_rh_status(hcd);
836 return IRQ_HANDLED;
837}
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853static int ehci_urb_enqueue (
854 struct usb_hcd *hcd,
855 struct urb *urb,
856 gfp_t mem_flags
857) {
858 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
859 struct list_head qtd_list;
860
861 INIT_LIST_HEAD (&qtd_list);
862
863 switch (usb_pipetype (urb->pipe)) {
864 case PIPE_CONTROL:
865
866
867
868 if (urb->transfer_buffer_length > (16 * 1024))
869 return -EMSGSIZE;
870
871
872 default:
873 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
874 return -ENOMEM;
875 return submit_async(ehci, urb, &qtd_list, mem_flags);
876
877 case PIPE_INTERRUPT:
878 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
879 return -ENOMEM;
880 return intr_submit(ehci, urb, &qtd_list, mem_flags);
881
882 case PIPE_ISOCHRONOUS:
883 if (urb->dev->speed == USB_SPEED_HIGH)
884 return itd_submit (ehci, urb, mem_flags);
885 else
886 return sitd_submit (ehci, urb, mem_flags);
887 }
888}
889
890
891
892
893
894static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
895{
896 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
897 struct ehci_qh *qh;
898 unsigned long flags;
899 int rc;
900
901 spin_lock_irqsave (&ehci->lock, flags);
902 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
903 if (rc)
904 goto done;
905
906 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
907
908
909
910
911
912 } else {
913 qh = (struct ehci_qh *) urb->hcpriv;
914 qh->unlink_reason |= QH_UNLINK_REQUESTED;
915 switch (qh->qh_state) {
916 case QH_STATE_LINKED:
917 if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)
918 start_unlink_intr(ehci, qh);
919 else
920 start_unlink_async(ehci, qh);
921 break;
922 case QH_STATE_COMPLETING:
923 qh->dequeue_during_giveback = 1;
924 break;
925 case QH_STATE_UNLINK:
926 case QH_STATE_UNLINK_WAIT:
927
928 break;
929 case QH_STATE_IDLE:
930
931 qh_completions(ehci, qh);
932 break;
933 }
934 }
935done:
936 spin_unlock_irqrestore (&ehci->lock, flags);
937 return rc;
938}
939
940
941
942
943
944static void
945ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
946{
947 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
948 unsigned long flags;
949 struct ehci_qh *qh;
950
951
952
953
954rescan:
955 spin_lock_irqsave (&ehci->lock, flags);
956 qh = ep->hcpriv;
957 if (!qh)
958 goto done;
959
960
961
962
963 if (qh->hw == NULL) {
964 struct ehci_iso_stream *stream = ep->hcpriv;
965
966 if (!list_empty(&stream->td_list))
967 goto idle_timeout;
968
969
970 reserve_release_iso_bandwidth(ehci, stream, -1);
971 kfree(stream);
972 goto done;
973 }
974
975 qh->unlink_reason |= QH_UNLINK_REQUESTED;
976 switch (qh->qh_state) {
977 case QH_STATE_LINKED:
978 if (list_empty(&qh->qtd_list))
979 qh->unlink_reason |= QH_UNLINK_QUEUE_EMPTY;
980 else
981 WARN_ON(1);
982 if (usb_endpoint_type(&ep->desc) != USB_ENDPOINT_XFER_INT)
983 start_unlink_async(ehci, qh);
984 else
985 start_unlink_intr(ehci, qh);
986 fallthrough;
987 case QH_STATE_COMPLETING:
988 case QH_STATE_UNLINK:
989 case QH_STATE_UNLINK_WAIT:
990idle_timeout:
991 spin_unlock_irqrestore (&ehci->lock, flags);
992 schedule_timeout_uninterruptible(1);
993 goto rescan;
994 case QH_STATE_IDLE:
995 if (qh->clearing_tt)
996 goto idle_timeout;
997 if (list_empty (&qh->qtd_list)) {
998 if (qh->ps.bw_uperiod)
999 reserve_release_intr_bandwidth(ehci, qh, -1);
1000 qh_destroy(ehci, qh);
1001 break;
1002 }
1003 fallthrough;
1004 default:
1005
1006
1007
1008 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1009 qh, ep->desc.bEndpointAddress, qh->qh_state,
1010 list_empty (&qh->qtd_list) ? "" : "(has tds)");
1011 break;
1012 }
1013 done:
1014 ep->hcpriv = NULL;
1015 spin_unlock_irqrestore (&ehci->lock, flags);
1016}
1017
1018static void
1019ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1020{
1021 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1022 struct ehci_qh *qh;
1023 int eptype = usb_endpoint_type(&ep->desc);
1024 int epnum = usb_endpoint_num(&ep->desc);
1025 int is_out = usb_endpoint_dir_out(&ep->desc);
1026 unsigned long flags;
1027
1028 if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1029 return;
1030
1031 spin_lock_irqsave(&ehci->lock, flags);
1032 qh = ep->hcpriv;
1033
1034
1035
1036
1037
1038
1039 if (qh) {
1040 if (!list_empty(&qh->qtd_list)) {
1041 WARN_ONCE(1, "clear_halt for a busy endpoint\n");
1042 } else {
1043
1044
1045
1046
1047 usb_settoggle(qh->ps.udev, epnum, is_out, 0);
1048 qh->unlink_reason |= QH_UNLINK_REQUESTED;
1049 if (eptype == USB_ENDPOINT_XFER_BULK)
1050 start_unlink_async(ehci, qh);
1051 else
1052 start_unlink_intr(ehci, qh);
1053 }
1054 }
1055 spin_unlock_irqrestore(&ehci->lock, flags);
1056}
1057
1058static int ehci_get_frame (struct usb_hcd *hcd)
1059{
1060 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
1061 return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size;
1062}
1063
1064
1065
1066
1067
1068static void ehci_remove_device(struct usb_hcd *hcd, struct usb_device *udev)
1069{
1070 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1071
1072 spin_lock_irq(&ehci->lock);
1073 drop_tt(udev);
1074 spin_unlock_irq(&ehci->lock);
1075}
1076
1077
1078
1079#ifdef CONFIG_PM
1080
1081
1082
1083
1084
1085int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup)
1086{
1087 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1088
1089 if (time_before(jiffies, ehci->next_statechange))
1090 msleep(10);
1091
1092
1093
1094
1095
1096
1097 ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
1098
1099 spin_lock_irq(&ehci->lock);
1100 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
1101 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
1102
1103 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1104 spin_unlock_irq(&ehci->lock);
1105
1106 synchronize_irq(hcd->irq);
1107
1108
1109 if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
1110 ehci_resume(hcd, false);
1111 return -EBUSY;
1112 }
1113
1114 return 0;
1115}
1116EXPORT_SYMBOL_GPL(ehci_suspend);
1117
1118
1119int ehci_resume(struct usb_hcd *hcd, bool force_reset)
1120{
1121 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1122
1123 if (time_before(jiffies, ehci->next_statechange))
1124 msleep(100);
1125
1126
1127 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1128
1129 if (ehci->shutdown)
1130 return 0;
1131
1132
1133
1134
1135
1136
1137 if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
1138 !force_reset) {
1139 int mask = INTR_MASK;
1140
1141 ehci_prepare_ports_for_controller_resume(ehci);
1142
1143 spin_lock_irq(&ehci->lock);
1144 if (ehci->shutdown)
1145 goto skip;
1146
1147 if (!hcd->self.root_hub->do_remote_wakeup)
1148 mask &= ~STS_PCD;
1149 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
1150 ehci_readl(ehci, &ehci->regs->intr_enable);
1151 skip:
1152 spin_unlock_irq(&ehci->lock);
1153 return 0;
1154 }
1155
1156
1157
1158
1159
1160 usb_root_hub_lost_power(hcd->self.root_hub);
1161 (void) ehci_halt(ehci);
1162 (void) ehci_reset(ehci);
1163
1164 spin_lock_irq(&ehci->lock);
1165 if (ehci->shutdown)
1166 goto skip;
1167
1168 ehci_writel(ehci, ehci->command, &ehci->regs->command);
1169 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
1170 ehci_readl(ehci, &ehci->regs->command);
1171
1172 ehci->rh_state = EHCI_RH_SUSPENDED;
1173 spin_unlock_irq(&ehci->lock);
1174
1175 return 1;
1176}
1177EXPORT_SYMBOL_GPL(ehci_resume);
1178
1179#endif
1180
1181
1182
1183
1184
1185
1186
1187
1188static const struct hc_driver ehci_hc_driver = {
1189 .description = hcd_name,
1190 .product_desc = "EHCI Host Controller",
1191 .hcd_priv_size = sizeof(struct ehci_hcd),
1192
1193
1194
1195
1196 .irq = ehci_irq,
1197 .flags = HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
1198
1199
1200
1201
1202 .reset = ehci_setup,
1203 .start = ehci_run,
1204 .stop = ehci_stop,
1205 .shutdown = ehci_shutdown,
1206
1207
1208
1209
1210 .urb_enqueue = ehci_urb_enqueue,
1211 .urb_dequeue = ehci_urb_dequeue,
1212 .endpoint_disable = ehci_endpoint_disable,
1213 .endpoint_reset = ehci_endpoint_reset,
1214 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
1215
1216
1217
1218
1219 .get_frame_number = ehci_get_frame,
1220
1221
1222
1223
1224 .hub_status_data = ehci_hub_status_data,
1225 .hub_control = ehci_hub_control,
1226 .bus_suspend = ehci_bus_suspend,
1227 .bus_resume = ehci_bus_resume,
1228 .relinquish_port = ehci_relinquish_port,
1229 .port_handed_over = ehci_port_handed_over,
1230 .get_resuming_ports = ehci_get_resuming_ports,
1231
1232
1233
1234
1235 .free_dev = ehci_remove_device,
1236};
1237
1238void ehci_init_driver(struct hc_driver *drv,
1239 const struct ehci_driver_overrides *over)
1240{
1241
1242 *drv = ehci_hc_driver;
1243
1244 if (over) {
1245 drv->hcd_priv_size += over->extra_priv_size;
1246 if (over->reset)
1247 drv->reset = over->reset;
1248 if (over->port_power)
1249 drv->port_power = over->port_power;
1250 }
1251}
1252EXPORT_SYMBOL_GPL(ehci_init_driver);
1253
1254
1255
1256MODULE_DESCRIPTION(DRIVER_DESC);
1257MODULE_AUTHOR (DRIVER_AUTHOR);
1258MODULE_LICENSE ("GPL");
1259
1260#ifdef CONFIG_USB_EHCI_SH
1261#include "ehci-sh.c"
1262#define PLATFORM_DRIVER ehci_hcd_sh_driver
1263#endif
1264
1265#ifdef CONFIG_PPC_PS3
1266#include "ehci-ps3.c"
1267#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
1268#endif
1269
1270#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1271#include "ehci-ppc-of.c"
1272#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver
1273#endif
1274
1275#ifdef CONFIG_XPS_USB_HCD_XILINX
1276#include "ehci-xilinx-of.c"
1277#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
1278#endif
1279
1280#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
1281#include "ehci-pmcmsp.c"
1282#define PLATFORM_DRIVER ehci_hcd_msp_driver
1283#endif
1284
1285#ifdef CONFIG_SPARC_LEON
1286#include "ehci-grlib.c"
1287#define PLATFORM_DRIVER ehci_grlib_driver
1288#endif
1289
1290static int __init ehci_hcd_init(void)
1291{
1292 int retval = 0;
1293
1294 if (usb_disabled())
1295 return -ENODEV;
1296
1297 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1298 set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1299 if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1300 test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1301 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1302 " before uhci_hcd and ohci_hcd, not after\n");
1303
1304 pr_debug("%s: block sizes: qh %zd qtd %zd itd %zd sitd %zd\n",
1305 hcd_name,
1306 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1307 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1308
1309#ifdef CONFIG_DYNAMIC_DEBUG
1310 ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
1311#endif
1312
1313#ifdef PLATFORM_DRIVER
1314 retval = platform_driver_register(&PLATFORM_DRIVER);
1315 if (retval < 0)
1316 goto clean0;
1317#endif
1318
1319#ifdef PS3_SYSTEM_BUS_DRIVER
1320 retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1321 if (retval < 0)
1322 goto clean2;
1323#endif
1324
1325#ifdef OF_PLATFORM_DRIVER
1326 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
1327 if (retval < 0)
1328 goto clean3;
1329#endif
1330
1331#ifdef XILINX_OF_PLATFORM_DRIVER
1332 retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER);
1333 if (retval < 0)
1334 goto clean4;
1335#endif
1336 return retval;
1337
1338#ifdef XILINX_OF_PLATFORM_DRIVER
1339
1340clean4:
1341#endif
1342#ifdef OF_PLATFORM_DRIVER
1343 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1344clean3:
1345#endif
1346#ifdef PS3_SYSTEM_BUS_DRIVER
1347 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1348clean2:
1349#endif
1350#ifdef PLATFORM_DRIVER
1351 platform_driver_unregister(&PLATFORM_DRIVER);
1352clean0:
1353#endif
1354#ifdef CONFIG_DYNAMIC_DEBUG
1355 debugfs_remove(ehci_debug_root);
1356 ehci_debug_root = NULL;
1357#endif
1358 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1359 return retval;
1360}
1361module_init(ehci_hcd_init);
1362
1363static void __exit ehci_hcd_cleanup(void)
1364{
1365#ifdef XILINX_OF_PLATFORM_DRIVER
1366 platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
1367#endif
1368#ifdef OF_PLATFORM_DRIVER
1369 platform_driver_unregister(&OF_PLATFORM_DRIVER);
1370#endif
1371#ifdef PLATFORM_DRIVER
1372 platform_driver_unregister(&PLATFORM_DRIVER);
1373#endif
1374#ifdef PS3_SYSTEM_BUS_DRIVER
1375 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1376#endif
1377#ifdef CONFIG_DYNAMIC_DEBUG
1378 debugfs_remove(ehci_debug_root);
1379#endif
1380 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1381}
1382module_exit(ehci_hcd_cleanup);
1383