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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/platform_device.h>
30#include <linux/slab.h>
31
32#include <asm/byteorder.h>
33#include <asm/io.h>
34#include <asm/irq.h>
35#include <asm/unaligned.h>
36
37#if defined(CONFIG_PPC_PS3)
38#include <asm/firmware.h>
39#endif
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57#define DRIVER_AUTHOR "David Brownell"
58#define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver"
59
60static const char hcd_name [] = "ehci_hcd";
61
62
63#undef EHCI_URB_TRACE
64
65
66#define EHCI_TUNE_CERR 3
67#define EHCI_TUNE_RL_HS 4
68#define EHCI_TUNE_RL_TT 0
69#define EHCI_TUNE_MULT_HS 1
70#define EHCI_TUNE_MULT_TT 1
71
72
73
74
75
76
77#define EHCI_TUNE_FLS 1
78
79
80static int log2_irq_thresh;
81module_param (log2_irq_thresh, int, S_IRUGO);
82MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
83
84
85static unsigned park;
86module_param (park, uint, S_IRUGO);
87MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets");
88
89
90static bool ignore_oc;
91module_param (ignore_oc, bool, S_IRUGO);
92MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
93
94#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
95
96
97
98#include "ehci.h"
99#include "pci-quirks.h"
100
101static void compute_tt_budget(u8 budget_table[EHCI_BANDWIDTH_SIZE],
102 struct ehci_tt *tt);
103
104
105
106
107
108
109
110
111static unsigned ehci_moschip_read_frame_index(struct ehci_hcd *ehci)
112{
113 unsigned uf;
114
115 uf = ehci_readl(ehci, &ehci->regs->frame_index);
116 if (unlikely((uf & 7) == 0))
117 uf = ehci_readl(ehci, &ehci->regs->frame_index);
118 return uf;
119}
120
121static inline unsigned ehci_read_frame_index(struct ehci_hcd *ehci)
122{
123 if (ehci->frame_index_bug)
124 return ehci_moschip_read_frame_index(ehci);
125 return ehci_readl(ehci, &ehci->regs->frame_index);
126}
127
128#include "ehci-dbg.c"
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
150 u32 mask, u32 done, int usec)
151{
152 u32 result;
153
154 do {
155 result = ehci_readl(ehci, ptr);
156 if (result == ~(u32)0)
157 return -ENODEV;
158 result &= mask;
159 if (result == done)
160 return 0;
161 udelay (1);
162 usec--;
163 } while (usec > 0);
164 return -ETIMEDOUT;
165}
166EXPORT_SYMBOL_GPL(ehci_handshake);
167
168
169static int tdi_in_host_mode (struct ehci_hcd *ehci)
170{
171 u32 tmp;
172
173 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
174 return (tmp & 3) == USBMODE_CM_HC;
175}
176
177
178
179
180
181static int ehci_halt (struct ehci_hcd *ehci)
182{
183 u32 temp;
184
185 spin_lock_irq(&ehci->lock);
186
187
188 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
189
190 if (ehci_is_TDI(ehci) && !tdi_in_host_mode(ehci)) {
191 spin_unlock_irq(&ehci->lock);
192 return 0;
193 }
194
195
196
197
198
199 ehci->command &= ~CMD_RUN;
200 temp = ehci_readl(ehci, &ehci->regs->command);
201 temp &= ~(CMD_RUN | CMD_IAAD);
202 ehci_writel(ehci, temp, &ehci->regs->command);
203
204 spin_unlock_irq(&ehci->lock);
205 synchronize_irq(ehci_to_hcd(ehci)->irq);
206
207 return ehci_handshake(ehci, &ehci->regs->status,
208 STS_HALT, STS_HALT, 16 * 125);
209}
210
211
212static void tdi_reset (struct ehci_hcd *ehci)
213{
214 u32 tmp;
215
216 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
217 tmp |= USBMODE_CM_HC;
218
219
220
221
222 if (ehci_big_endian_mmio(ehci))
223 tmp |= USBMODE_BE;
224 ehci_writel(ehci, tmp, &ehci->regs->usbmode);
225}
226
227
228
229
230
231int ehci_reset(struct ehci_hcd *ehci)
232{
233 int retval;
234 u32 command = ehci_readl(ehci, &ehci->regs->command);
235
236
237
238 if (ehci->debug && !dbgp_reset_prep(ehci_to_hcd(ehci)))
239 ehci->debug = NULL;
240
241 command |= CMD_RESET;
242 dbg_cmd (ehci, "reset", command);
243 ehci_writel(ehci, command, &ehci->regs->command);
244 ehci->rh_state = EHCI_RH_HALTED;
245 ehci->next_statechange = jiffies;
246 retval = ehci_handshake(ehci, &ehci->regs->command,
247 CMD_RESET, 0, 250 * 1000);
248
249 if (ehci->has_hostpc) {
250 ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS,
251 &ehci->regs->usbmode_ex);
252 ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning);
253 }
254 if (retval)
255 return retval;
256
257 if (ehci_is_TDI(ehci))
258 tdi_reset (ehci);
259
260 if (ehci->debug)
261 dbgp_external_startup(ehci_to_hcd(ehci));
262
263 ehci->port_c_suspend = ehci->suspended_ports =
264 ehci->resuming_ports = 0;
265 return retval;
266}
267EXPORT_SYMBOL_GPL(ehci_reset);
268
269
270
271
272
273static void ehci_quiesce (struct ehci_hcd *ehci)
274{
275 u32 temp;
276
277 if (ehci->rh_state != EHCI_RH_RUNNING)
278 return;
279
280
281 temp = (ehci->command << 10) & (STS_ASS | STS_PSS);
282 ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp,
283 16 * 125);
284
285
286 spin_lock_irq(&ehci->lock);
287 ehci->command &= ~(CMD_ASE | CMD_PSE);
288 ehci_writel(ehci, ehci->command, &ehci->regs->command);
289 spin_unlock_irq(&ehci->lock);
290
291
292 ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0,
293 16 * 125);
294}
295
296
297
298static void end_iaa_cycle(struct ehci_hcd *ehci);
299static void end_unlink_async(struct ehci_hcd *ehci);
300static void unlink_empty_async(struct ehci_hcd *ehci);
301static void ehci_work(struct ehci_hcd *ehci);
302static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
303static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
304static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable);
305
306#include "ehci-timer.c"
307#include "ehci-hub.c"
308#include "ehci-mem.c"
309#include "ehci-q.c"
310#include "ehci-sched.c"
311#include "ehci-sysfs.c"
312
313
314
315
316
317
318
319static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
320{
321 int port = HCS_N_PORTS(ehci->hcs_params);
322
323 while (port--) {
324 spin_unlock_irq(&ehci->lock);
325 ehci_port_power(ehci, port, false);
326 spin_lock_irq(&ehci->lock);
327 ehci_writel(ehci, PORT_RWC_BITS,
328 &ehci->regs->port_status[port]);
329 }
330}
331
332
333
334
335
336static void ehci_silence_controller(struct ehci_hcd *ehci)
337{
338 ehci_halt(ehci);
339
340 spin_lock_irq(&ehci->lock);
341 ehci->rh_state = EHCI_RH_HALTED;
342 ehci_turn_off_all_ports(ehci);
343
344
345 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
346
347
348 ehci_readl(ehci, &ehci->regs->configured_flag);
349 spin_unlock_irq(&ehci->lock);
350}
351
352
353
354
355
356static void ehci_shutdown(struct usb_hcd *hcd)
357{
358 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
359
360
361
362
363
364
365
366 if (!ehci->sbrn)
367 return;
368
369 spin_lock_irq(&ehci->lock);
370 ehci->shutdown = true;
371 ehci->rh_state = EHCI_RH_STOPPING;
372 ehci->enabled_hrtimer_events = 0;
373 spin_unlock_irq(&ehci->lock);
374
375 ehci_silence_controller(ehci);
376
377 hrtimer_cancel(&ehci->hrtimer);
378}
379
380
381
382
383
384
385
386static void ehci_work (struct ehci_hcd *ehci)
387{
388
389
390
391
392 if (ehci->scanning) {
393 ehci->need_rescan = true;
394 return;
395 }
396 ehci->scanning = true;
397
398 rescan:
399 ehci->need_rescan = false;
400 if (ehci->async_count)
401 scan_async(ehci);
402 if (ehci->intr_count > 0)
403 scan_intr(ehci);
404 if (ehci->isoc_count > 0)
405 scan_isoc(ehci);
406 if (ehci->need_rescan)
407 goto rescan;
408 ehci->scanning = false;
409
410
411
412
413
414 turn_on_io_watchdog(ehci);
415}
416
417
418
419
420static void ehci_stop (struct usb_hcd *hcd)
421{
422 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
423
424 ehci_dbg (ehci, "stop\n");
425
426
427
428 spin_lock_irq(&ehci->lock);
429 ehci->enabled_hrtimer_events = 0;
430 spin_unlock_irq(&ehci->lock);
431
432 ehci_quiesce(ehci);
433 ehci_silence_controller(ehci);
434 ehci_reset (ehci);
435
436 hrtimer_cancel(&ehci->hrtimer);
437 remove_sysfs_files(ehci);
438 remove_debug_files (ehci);
439
440
441 spin_lock_irq (&ehci->lock);
442 end_free_itds(ehci);
443 spin_unlock_irq (&ehci->lock);
444 ehci_mem_cleanup (ehci);
445
446 if (ehci->amd_pll_fix == 1)
447 usb_amd_dev_put();
448
449 dbg_status (ehci, "ehci_stop completed",
450 ehci_readl(ehci, &ehci->regs->status));
451}
452
453
454static int ehci_init(struct usb_hcd *hcd)
455{
456 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
457 u32 temp;
458 int retval;
459 u32 hcc_params;
460 struct ehci_qh_hw *hw;
461
462 spin_lock_init(&ehci->lock);
463
464
465
466
467 ehci->need_io_watchdog = 1;
468
469 hrtimer_init(&ehci->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
470 ehci->hrtimer.function = ehci_hrtimer_func;
471 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
472
473 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
474
475
476
477
478
479 ehci->uframe_periodic_max = 100;
480
481
482
483
484
485 ehci->periodic_size = DEFAULT_I_TDPS;
486 INIT_LIST_HEAD(&ehci->async_unlink);
487 INIT_LIST_HEAD(&ehci->async_idle);
488 INIT_LIST_HEAD(&ehci->intr_unlink_wait);
489 INIT_LIST_HEAD(&ehci->intr_unlink);
490 INIT_LIST_HEAD(&ehci->intr_qh_list);
491 INIT_LIST_HEAD(&ehci->cached_itd_list);
492 INIT_LIST_HEAD(&ehci->cached_sitd_list);
493 INIT_LIST_HEAD(&ehci->tt_list);
494
495 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
496
497 switch (EHCI_TUNE_FLS) {
498 case 0: ehci->periodic_size = 1024; break;
499 case 1: ehci->periodic_size = 512; break;
500 case 2: ehci->periodic_size = 256; break;
501 default: BUG();
502 }
503 }
504 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
505 return retval;
506
507
508 if (HCC_ISOC_CACHE(hcc_params))
509 ehci->i_thresh = 0;
510 else
511 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
512
513
514
515
516
517
518
519
520 ehci->async->qh_next.qh = NULL;
521 hw = ehci->async->hw;
522 hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
523 hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
524#if defined(CONFIG_PPC_PS3)
525 hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE);
526#endif
527 hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
528 hw->hw_qtd_next = EHCI_LIST_END(ehci);
529 ehci->async->qh_state = QH_STATE_LINKED;
530 hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
531
532
533 if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
534 log2_irq_thresh = 0;
535 temp = 1 << (16 + log2_irq_thresh);
536 if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
537 ehci->has_ppcd = 1;
538 ehci_dbg(ehci, "enable per-port change event\n");
539 temp |= CMD_PPCEE;
540 }
541 if (HCC_CANPARK(hcc_params)) {
542
543
544
545
546
547
548
549 if (park) {
550 park = min(park, (unsigned) 3);
551 temp |= CMD_PARK;
552 temp |= park << 8;
553 }
554 ehci_dbg(ehci, "park %d\n", park);
555 }
556 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
557
558 temp &= ~(3 << 2);
559 temp |= (EHCI_TUNE_FLS << 2);
560 }
561 ehci->command = temp;
562
563
564 if (!hcd->localmem_pool)
565 hcd->self.sg_tablesize = ~0;
566
567
568 ehci->old_current = ~0;
569 return 0;
570}
571
572
573static int ehci_run (struct usb_hcd *hcd)
574{
575 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
576 u32 temp;
577 u32 hcc_params;
578 int rc;
579
580 hcd->uses_new_polling = 1;
581
582
583
584 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
585 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
586
587
588
589
590
591
592
593
594
595
596
597
598
599 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
600 if (HCC_64BIT_ADDR(hcc_params)) {
601 ehci_writel(ehci, 0, &ehci->regs->segment);
602#if 0
603
604 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
605 ehci_info(ehci, "enabled 64bit DMA\n");
606#endif
607 }
608
609
610
611
612 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
613 ehci->command |= CMD_RUN;
614 ehci_writel(ehci, ehci->command, &ehci->regs->command);
615 dbg_cmd (ehci, "init", ehci->command);
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631 down_write(&ehci_cf_port_reset_rwsem);
632 ehci->rh_state = EHCI_RH_RUNNING;
633 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
634
635
636 ehci_readl(ehci, &ehci->regs->command);
637 msleep(5);
638 rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
639
640 up_write(&ehci_cf_port_reset_rwsem);
641
642 if (rc) {
643 ehci_err(ehci, "USB %x.%x, controller refused to start: %d\n",
644 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f), rc);
645 return rc;
646 }
647
648 ehci->last_periodic_enable = ktime_get_real();
649
650 temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
651 ehci_info (ehci,
652 "USB %x.%x started, EHCI %x.%02x%s\n",
653 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
654 temp >> 8, temp & 0xff,
655 (ignore_oc || ehci->spurious_oc) ? ", overcurrent ignored" : "");
656
657 ehci_writel(ehci, INTR_MASK,
658 &ehci->regs->intr_enable);
659
660
661
662
663
664 create_debug_files(ehci);
665 create_sysfs_files(ehci);
666
667 return 0;
668}
669
670int ehci_setup(struct usb_hcd *hcd)
671{
672 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
673 int retval;
674
675 ehci->regs = (void __iomem *)ehci->caps +
676 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
677 dbg_hcs_params(ehci, "reset");
678 dbg_hcc_params(ehci, "reset");
679
680
681 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
682
683 ehci->sbrn = HCD_USB2;
684
685
686 retval = ehci_init(hcd);
687 if (retval)
688 return retval;
689
690 retval = ehci_halt(ehci);
691 if (retval) {
692 ehci_mem_cleanup(ehci);
693 return retval;
694 }
695
696 ehci_reset(ehci);
697
698 return 0;
699}
700EXPORT_SYMBOL_GPL(ehci_setup);
701
702
703
704static irqreturn_t ehci_irq (struct usb_hcd *hcd)
705{
706 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
707 u32 status, current_status, masked_status, pcd_status = 0;
708 u32 cmd;
709 int bh;
710
711 spin_lock(&ehci->lock);
712
713 status = 0;
714 current_status = ehci_readl(ehci, &ehci->regs->status);
715restart:
716
717
718 if (current_status == ~(u32) 0) {
719 ehci_dbg (ehci, "device removed\n");
720 goto dead;
721 }
722 status |= current_status;
723
724
725
726
727
728 masked_status = current_status & (INTR_MASK | STS_FLR);
729
730
731 if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) {
732 spin_unlock(&ehci->lock);
733 return IRQ_NONE;
734 }
735
736
737 ehci_writel(ehci, masked_status, &ehci->regs->status);
738
739
740 current_status = ehci_readl(ehci, &ehci->regs->status);
741 if (current_status & INTR_MASK)
742 goto restart;
743
744 cmd = ehci_readl(ehci, &ehci->regs->command);
745 bh = 0;
746
747
748 if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
749 if (likely ((status & STS_ERR) == 0))
750 INCR(ehci->stats.normal);
751 else
752 INCR(ehci->stats.error);
753 bh = 1;
754 }
755
756
757 if (status & STS_IAA) {
758
759
760 ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_IAA_WATCHDOG);
761
762
763
764
765
766
767
768
769 if (ehci->next_hrtimer_event == EHCI_HRTIMER_IAA_WATCHDOG)
770 ++ehci->next_hrtimer_event;
771
772
773 if (cmd & CMD_IAAD)
774 ehci_dbg(ehci, "IAA with IAAD still set?\n");
775 if (ehci->iaa_in_progress)
776 INCR(ehci->stats.iaa);
777 end_iaa_cycle(ehci);
778 }
779
780
781 if (status & STS_PCD) {
782 unsigned i = HCS_N_PORTS (ehci->hcs_params);
783 u32 ppcd = ~0;
784
785
786 pcd_status = status;
787
788
789 if (ehci->rh_state == EHCI_RH_SUSPENDED)
790 usb_hcd_resume_root_hub(hcd);
791
792
793 if (ehci->has_ppcd)
794 ppcd = status >> 16;
795
796 while (i--) {
797 int pstatus;
798
799
800 if (!(ppcd & (1 << i)))
801 continue;
802 pstatus = ehci_readl(ehci,
803 &ehci->regs->port_status[i]);
804
805 if (pstatus & PORT_OWNER)
806 continue;
807 if (!(test_bit(i, &ehci->suspended_ports) &&
808 ((pstatus & PORT_RESUME) ||
809 !(pstatus & PORT_SUSPEND)) &&
810 (pstatus & PORT_PE) &&
811 ehci->reset_done[i] == 0))
812 continue;
813
814
815
816
817
818 ehci->reset_done[i] = jiffies +
819 msecs_to_jiffies(USB_RESUME_TIMEOUT);
820 set_bit(i, &ehci->resuming_ports);
821 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
822 usb_hcd_start_port_resume(&hcd->self, i);
823 mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
824 }
825 }
826
827
828 if (unlikely ((status & STS_FATAL) != 0)) {
829 ehci_err(ehci, "fatal error\n");
830 dbg_cmd(ehci, "fatal", cmd);
831 dbg_status(ehci, "fatal", status);
832dead:
833 usb_hc_died(hcd);
834
835
836 ehci->shutdown = true;
837 ehci->rh_state = EHCI_RH_STOPPING;
838 ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE);
839 ehci_writel(ehci, ehci->command, &ehci->regs->command);
840 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
841 ehci_handle_controller_death(ehci);
842
843
844 bh = 0;
845 }
846
847 if (bh)
848 ehci_work (ehci);
849 spin_unlock(&ehci->lock);
850 if (pcd_status)
851 usb_hcd_poll_rh_status(hcd);
852 return IRQ_HANDLED;
853}
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869static int ehci_urb_enqueue (
870 struct usb_hcd *hcd,
871 struct urb *urb,
872 gfp_t mem_flags
873) {
874 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
875 struct list_head qtd_list;
876
877 INIT_LIST_HEAD (&qtd_list);
878
879 switch (usb_pipetype (urb->pipe)) {
880 case PIPE_CONTROL:
881
882
883
884 if (urb->transfer_buffer_length > (16 * 1024))
885 return -EMSGSIZE;
886 fallthrough;
887
888 default:
889 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
890 return -ENOMEM;
891 return submit_async(ehci, urb, &qtd_list, mem_flags);
892
893 case PIPE_INTERRUPT:
894 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
895 return -ENOMEM;
896 return intr_submit(ehci, urb, &qtd_list, mem_flags);
897
898 case PIPE_ISOCHRONOUS:
899 if (urb->dev->speed == USB_SPEED_HIGH)
900 return itd_submit (ehci, urb, mem_flags);
901 else
902 return sitd_submit (ehci, urb, mem_flags);
903 }
904}
905
906
907
908
909
910static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
911{
912 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
913 struct ehci_qh *qh;
914 unsigned long flags;
915 int rc;
916
917 spin_lock_irqsave (&ehci->lock, flags);
918 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
919 if (rc)
920 goto done;
921
922 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
923
924
925
926
927
928 } else {
929 qh = (struct ehci_qh *) urb->hcpriv;
930 qh->unlink_reason |= QH_UNLINK_REQUESTED;
931 switch (qh->qh_state) {
932 case QH_STATE_LINKED:
933 if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)
934 start_unlink_intr(ehci, qh);
935 else
936 start_unlink_async(ehci, qh);
937 break;
938 case QH_STATE_COMPLETING:
939 qh->dequeue_during_giveback = 1;
940 break;
941 case QH_STATE_UNLINK:
942 case QH_STATE_UNLINK_WAIT:
943
944 break;
945 case QH_STATE_IDLE:
946
947 qh_completions(ehci, qh);
948 break;
949 }
950 }
951done:
952 spin_unlock_irqrestore (&ehci->lock, flags);
953 return rc;
954}
955
956
957
958
959
960static void
961ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
962{
963 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
964 unsigned long flags;
965 struct ehci_qh *qh;
966
967
968
969
970rescan:
971 spin_lock_irqsave (&ehci->lock, flags);
972 qh = ep->hcpriv;
973 if (!qh)
974 goto done;
975
976
977
978
979 if (qh->hw == NULL) {
980 struct ehci_iso_stream *stream = ep->hcpriv;
981
982 if (!list_empty(&stream->td_list))
983 goto idle_timeout;
984
985
986 reserve_release_iso_bandwidth(ehci, stream, -1);
987 kfree(stream);
988 goto done;
989 }
990
991 qh->unlink_reason |= QH_UNLINK_REQUESTED;
992 switch (qh->qh_state) {
993 case QH_STATE_LINKED:
994 if (list_empty(&qh->qtd_list))
995 qh->unlink_reason |= QH_UNLINK_QUEUE_EMPTY;
996 else
997 WARN_ON(1);
998 if (usb_endpoint_type(&ep->desc) != USB_ENDPOINT_XFER_INT)
999 start_unlink_async(ehci, qh);
1000 else
1001 start_unlink_intr(ehci, qh);
1002 fallthrough;
1003 case QH_STATE_COMPLETING:
1004 case QH_STATE_UNLINK:
1005 case QH_STATE_UNLINK_WAIT:
1006idle_timeout:
1007 spin_unlock_irqrestore (&ehci->lock, flags);
1008 schedule_timeout_uninterruptible(1);
1009 goto rescan;
1010 case QH_STATE_IDLE:
1011 if (qh->clearing_tt)
1012 goto idle_timeout;
1013 if (list_empty (&qh->qtd_list)) {
1014 if (qh->ps.bw_uperiod)
1015 reserve_release_intr_bandwidth(ehci, qh, -1);
1016 qh_destroy(ehci, qh);
1017 break;
1018 }
1019 fallthrough;
1020 default:
1021
1022
1023
1024 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1025 qh, ep->desc.bEndpointAddress, qh->qh_state,
1026 list_empty (&qh->qtd_list) ? "" : "(has tds)");
1027 break;
1028 }
1029 done:
1030 ep->hcpriv = NULL;
1031 spin_unlock_irqrestore (&ehci->lock, flags);
1032}
1033
1034static void
1035ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1036{
1037 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1038 struct ehci_qh *qh;
1039 int eptype = usb_endpoint_type(&ep->desc);
1040 int epnum = usb_endpoint_num(&ep->desc);
1041 int is_out = usb_endpoint_dir_out(&ep->desc);
1042 unsigned long flags;
1043
1044 if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1045 return;
1046
1047 spin_lock_irqsave(&ehci->lock, flags);
1048 qh = ep->hcpriv;
1049
1050
1051
1052
1053
1054
1055 if (qh) {
1056 if (!list_empty(&qh->qtd_list)) {
1057 WARN_ONCE(1, "clear_halt for a busy endpoint\n");
1058 } else {
1059
1060
1061
1062
1063 usb_settoggle(qh->ps.udev, epnum, is_out, 0);
1064 qh->unlink_reason |= QH_UNLINK_REQUESTED;
1065 if (eptype == USB_ENDPOINT_XFER_BULK)
1066 start_unlink_async(ehci, qh);
1067 else
1068 start_unlink_intr(ehci, qh);
1069 }
1070 }
1071 spin_unlock_irqrestore(&ehci->lock, flags);
1072}
1073
1074static int ehci_get_frame (struct usb_hcd *hcd)
1075{
1076 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
1077 return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size;
1078}
1079
1080
1081
1082
1083
1084static void ehci_remove_device(struct usb_hcd *hcd, struct usb_device *udev)
1085{
1086 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1087
1088 spin_lock_irq(&ehci->lock);
1089 drop_tt(udev);
1090 spin_unlock_irq(&ehci->lock);
1091}
1092
1093
1094
1095#ifdef CONFIG_PM
1096
1097
1098
1099
1100
1101int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup)
1102{
1103 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1104
1105 if (time_before(jiffies, ehci->next_statechange))
1106 msleep(10);
1107
1108
1109
1110
1111
1112
1113 ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
1114
1115 spin_lock_irq(&ehci->lock);
1116 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
1117 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
1118
1119 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1120 spin_unlock_irq(&ehci->lock);
1121
1122 synchronize_irq(hcd->irq);
1123
1124
1125 if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
1126 ehci_resume(hcd, false);
1127 return -EBUSY;
1128 }
1129
1130 return 0;
1131}
1132EXPORT_SYMBOL_GPL(ehci_suspend);
1133
1134
1135int ehci_resume(struct usb_hcd *hcd, bool force_reset)
1136{
1137 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1138
1139 if (time_before(jiffies, ehci->next_statechange))
1140 msleep(100);
1141
1142
1143 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1144
1145 if (ehci->shutdown)
1146 return 0;
1147
1148
1149
1150
1151
1152
1153 if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
1154 !force_reset) {
1155 int mask = INTR_MASK;
1156
1157 ehci_prepare_ports_for_controller_resume(ehci);
1158
1159 spin_lock_irq(&ehci->lock);
1160 if (ehci->shutdown)
1161 goto skip;
1162
1163 if (!hcd->self.root_hub->do_remote_wakeup)
1164 mask &= ~STS_PCD;
1165 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
1166 ehci_readl(ehci, &ehci->regs->intr_enable);
1167 skip:
1168 spin_unlock_irq(&ehci->lock);
1169 return 0;
1170 }
1171
1172
1173
1174
1175
1176 usb_root_hub_lost_power(hcd->self.root_hub);
1177 (void) ehci_halt(ehci);
1178 (void) ehci_reset(ehci);
1179
1180 spin_lock_irq(&ehci->lock);
1181 if (ehci->shutdown)
1182 goto skip;
1183
1184 ehci_writel(ehci, ehci->command, &ehci->regs->command);
1185 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
1186 ehci_readl(ehci, &ehci->regs->command);
1187
1188 ehci->rh_state = EHCI_RH_SUSPENDED;
1189 spin_unlock_irq(&ehci->lock);
1190
1191 return 1;
1192}
1193EXPORT_SYMBOL_GPL(ehci_resume);
1194
1195#endif
1196
1197
1198
1199
1200
1201
1202
1203
1204static const struct hc_driver ehci_hc_driver = {
1205 .description = hcd_name,
1206 .product_desc = "EHCI Host Controller",
1207 .hcd_priv_size = sizeof(struct ehci_hcd),
1208
1209
1210
1211
1212 .irq = ehci_irq,
1213 .flags = HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
1214
1215
1216
1217
1218 .reset = ehci_setup,
1219 .start = ehci_run,
1220 .stop = ehci_stop,
1221 .shutdown = ehci_shutdown,
1222
1223
1224
1225
1226 .urb_enqueue = ehci_urb_enqueue,
1227 .urb_dequeue = ehci_urb_dequeue,
1228 .endpoint_disable = ehci_endpoint_disable,
1229 .endpoint_reset = ehci_endpoint_reset,
1230 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
1231
1232
1233
1234
1235 .get_frame_number = ehci_get_frame,
1236
1237
1238
1239
1240 .hub_status_data = ehci_hub_status_data,
1241 .hub_control = ehci_hub_control,
1242 .bus_suspend = ehci_bus_suspend,
1243 .bus_resume = ehci_bus_resume,
1244 .relinquish_port = ehci_relinquish_port,
1245 .port_handed_over = ehci_port_handed_over,
1246 .get_resuming_ports = ehci_get_resuming_ports,
1247
1248
1249
1250
1251 .free_dev = ehci_remove_device,
1252#ifdef CONFIG_USB_HCD_TEST_MODE
1253
1254 .submit_single_step_set_feature = ehci_submit_single_step_set_feature,
1255#endif
1256};
1257
1258void ehci_init_driver(struct hc_driver *drv,
1259 const struct ehci_driver_overrides *over)
1260{
1261
1262 *drv = ehci_hc_driver;
1263
1264 if (over) {
1265 drv->hcd_priv_size += over->extra_priv_size;
1266 if (over->reset)
1267 drv->reset = over->reset;
1268 if (over->port_power)
1269 drv->port_power = over->port_power;
1270 }
1271}
1272EXPORT_SYMBOL_GPL(ehci_init_driver);
1273
1274
1275
1276MODULE_DESCRIPTION(DRIVER_DESC);
1277MODULE_AUTHOR (DRIVER_AUTHOR);
1278MODULE_LICENSE ("GPL");
1279
1280#ifdef CONFIG_USB_EHCI_SH
1281#include "ehci-sh.c"
1282#endif
1283
1284#ifdef CONFIG_PPC_PS3
1285#include "ehci-ps3.c"
1286#endif
1287
1288#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1289#include "ehci-ppc-of.c"
1290#endif
1291
1292#ifdef CONFIG_XPS_USB_HCD_XILINX
1293#include "ehci-xilinx-of.c"
1294#endif
1295
1296#ifdef CONFIG_SPARC_LEON
1297#include "ehci-grlib.c"
1298#endif
1299
1300static struct platform_driver * const platform_drivers[] = {
1301#ifdef CONFIG_USB_EHCI_SH
1302 &ehci_hcd_sh_driver,
1303#endif
1304#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1305 &ehci_hcd_ppc_of_driver,
1306#endif
1307#ifdef CONFIG_XPS_USB_HCD_XILINX
1308 &ehci_hcd_xilinx_of_driver,
1309#endif
1310#ifdef CONFIG_SPARC_LEON
1311 &ehci_grlib_driver,
1312#endif
1313};
1314
1315static int __init ehci_hcd_init(void)
1316{
1317 int retval = 0;
1318
1319 if (usb_disabled())
1320 return -ENODEV;
1321
1322 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1323 set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1324 if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1325 test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1326 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1327 " before uhci_hcd and ohci_hcd, not after\n");
1328
1329 pr_debug("%s: block sizes: qh %zd qtd %zd itd %zd sitd %zd\n",
1330 hcd_name,
1331 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1332 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1333
1334#ifdef CONFIG_DYNAMIC_DEBUG
1335 ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
1336#endif
1337
1338 retval = platform_register_drivers(platform_drivers, ARRAY_SIZE(platform_drivers));
1339 if (retval < 0)
1340 goto clean0;
1341
1342#ifdef CONFIG_PPC_PS3
1343 retval = ps3_ehci_driver_register(&ps3_ehci_driver);
1344 if (retval < 0)
1345 goto clean1;
1346#endif
1347
1348 return 0;
1349
1350#ifdef CONFIG_PPC_PS3
1351clean1:
1352#endif
1353 platform_unregister_drivers(platform_drivers, ARRAY_SIZE(platform_drivers));
1354clean0:
1355#ifdef CONFIG_DYNAMIC_DEBUG
1356 debugfs_remove(ehci_debug_root);
1357 ehci_debug_root = NULL;
1358#endif
1359 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1360 return retval;
1361}
1362module_init(ehci_hcd_init);
1363
1364static void __exit ehci_hcd_cleanup(void)
1365{
1366#ifdef CONFIG_PPC_PS3
1367 ps3_ehci_driver_unregister(&ps3_ehci_driver);
1368#endif
1369 platform_unregister_drivers(platform_drivers, ARRAY_SIZE(platform_drivers));
1370#ifdef CONFIG_DYNAMIC_DEBUG
1371 debugfs_remove(ehci_debug_root);
1372#endif
1373 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1374}
1375module_exit(ehci_hcd_cleanup);
1376