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24
25#include <linux/module.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/init.h>
29#include <linux/delay.h>
30#include <linux/ioport.h>
31#include <linux/slab.h>
32#include <linux/errno.h>
33#include <linux/unistd.h>
34#include <linux/interrupt.h>
35#include <linux/spinlock.h>
36#include <linux/debugfs.h>
37#include <linux/pm.h>
38#include <linux/dmapool.h>
39#include <linux/dma-mapping.h>
40#include <linux/usb.h>
41#include <linux/bitops.h>
42#include <linux/dmi.h>
43
44#include <asm/uaccess.h>
45#include <asm/io.h>
46#include <asm/irq.h>
47#include <asm/system.h>
48
49#include "../core/hcd.h"
50#include "uhci-hcd.h"
51#include "pci-quirks.h"
52
53
54
55
56#define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, \
57Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber, \
58Alan Stern"
59#define DRIVER_DESC "USB Universal Host Controller Interface driver"
60
61
62static int ignore_oc;
63module_param(ignore_oc, bool, S_IRUGO);
64MODULE_PARM_DESC(ignore_oc, "ignore hardware overcurrent indications");
65
66
67
68
69
70
71
72
73#ifdef DEBUG
74#define DEBUG_CONFIGURED 1
75static int debug = 1;
76module_param(debug, int, S_IRUGO | S_IWUSR);
77MODULE_PARM_DESC(debug, "Debug level");
78
79#else
80#define DEBUG_CONFIGURED 0
81#define debug 0
82#endif
83
84static char *errbuf;
85#define ERRBUF_LEN (32 * 1024)
86
87static struct kmem_cache *uhci_up_cachep;
88
89static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state);
90static void wakeup_rh(struct uhci_hcd *uhci);
91static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
92
93
94
95
96static __le32 uhci_frame_skel_link(struct uhci_hcd *uhci, int frame)
97{
98 int skelnum;
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115 skelnum = 8 - (int) __ffs(frame | UHCI_NUMFRAMES);
116 if (skelnum <= 1)
117 skelnum = 9;
118 return LINK_TO_QH(uhci->skelqh[skelnum]);
119}
120
121#include "uhci-debug.c"
122#include "uhci-q.c"
123#include "uhci-hub.c"
124
125
126
127
128static void finish_reset(struct uhci_hcd *uhci)
129{
130 int port;
131
132
133
134
135
136 for (port = 0; port < uhci->rh_numports; ++port)
137 outw(0, uhci->io_addr + USBPORTSC1 + (port * 2));
138
139 uhci->port_c_suspend = uhci->resuming_ports = 0;
140 uhci->rh_state = UHCI_RH_RESET;
141 uhci->is_stopped = UHCI_IS_STOPPED;
142 uhci_to_hcd(uhci)->state = HC_STATE_HALT;
143 uhci_to_hcd(uhci)->poll_rh = 0;
144
145 uhci->dead = 0;
146}
147
148
149
150
151
152static void uhci_hc_died(struct uhci_hcd *uhci)
153{
154 uhci_get_current_frame_number(uhci);
155 uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
156 finish_reset(uhci);
157 uhci->dead = 1;
158
159
160 ++uhci->frame_number;
161}
162
163
164
165
166
167
168static void check_and_reset_hc(struct uhci_hcd *uhci)
169{
170 if (uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr))
171 finish_reset(uhci);
172}
173
174
175
176
177static void configure_hc(struct uhci_hcd *uhci)
178{
179
180 outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF);
181
182
183 outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD);
184
185
186 outw(uhci->frame_number & UHCI_MAX_SOF_NUMBER,
187 uhci->io_addr + USBFRNUM);
188
189
190 uhci_to_hcd(uhci)->state = HC_STATE_SUSPENDED;
191 mb();
192
193
194 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP,
195 USBLEGSUP_DEFAULT);
196}
197
198
199static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
200{
201 int port;
202
203
204
205 if (ignore_oc)
206 return 1;
207
208 switch (to_pci_dev(uhci_dev(uhci))->vendor) {
209 default:
210 break;
211
212 case PCI_VENDOR_ID_GENESYS:
213
214
215
216 return 1;
217
218 case PCI_VENDOR_ID_INTEL:
219
220
221
222
223
224
225
226 for (port = 0; port < uhci->rh_numports; ++port) {
227 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
228 USBPORTSC_OC)
229 return 1;
230 }
231 break;
232 }
233 return 0;
234}
235
236static int global_suspend_mode_is_broken(struct uhci_hcd *uhci)
237{
238 int port;
239 const char *sys_info;
240 static char bad_Asus_board[] = "A7V8X";
241
242
243
244
245
246 sys_info = dmi_get_system_info(DMI_BOARD_NAME);
247 if (sys_info && !strcmp(sys_info, bad_Asus_board)) {
248 for (port = 0; port < uhci->rh_numports; ++port) {
249 if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
250 USBPORTSC_CCS)
251 return 1;
252 }
253 }
254
255 return 0;
256}
257
258static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state)
259__releases(uhci->lock)
260__acquires(uhci->lock)
261{
262 int auto_stop;
263 int int_enable, egsm_enable, wakeup_enable;
264 struct usb_device *rhdev = uhci_to_hcd(uhci)->self.root_hub;
265
266 auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
267 dev_dbg(&rhdev->dev, "%s%s\n", __func__,
268 (auto_stop ? " (auto-stop)" : ""));
269
270
271
272
273 egsm_enable = USBCMD_EGSM;
274 uhci->RD_enable = 1;
275 int_enable = USBINTR_RESUME;
276 wakeup_enable = 1;
277
278
279
280
281
282 if (auto_stop) {
283 if (!device_may_wakeup(&rhdev->dev))
284 int_enable = 0;
285
286
287
288
289 } else {
290#ifdef CONFIG_PM
291 if (!rhdev->do_remote_wakeup)
292 wakeup_enable = 0;
293#endif
294 }
295
296
297
298
299
300
301
302 if (!wakeup_enable || global_suspend_mode_is_broken(uhci))
303 egsm_enable = 0;
304
305
306
307
308
309
310
311
312
313
314 if (!wakeup_enable || resume_detect_interrupts_are_broken(uhci) ||
315 !int_enable)
316 uhci->RD_enable = int_enable = 0;
317
318 outw(int_enable, uhci->io_addr + USBINTR);
319 outw(egsm_enable | USBCMD_CF, uhci->io_addr + USBCMD);
320 mb();
321 udelay(5);
322
323
324
325
326
327
328 if (!auto_stop && !(inw(uhci->io_addr + USBSTS) & USBSTS_HCH)) {
329 uhci->rh_state = UHCI_RH_SUSPENDING;
330 spin_unlock_irq(&uhci->lock);
331 msleep(1);
332 spin_lock_irq(&uhci->lock);
333 if (uhci->dead)
334 return;
335 }
336 if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH))
337 dev_warn(uhci_dev(uhci), "Controller not stopped yet!\n");
338
339 uhci_get_current_frame_number(uhci);
340
341 uhci->rh_state = new_state;
342 uhci->is_stopped = UHCI_IS_STOPPED;
343
344
345
346
347 uhci_to_hcd(uhci)->poll_rh = (!int_enable && wakeup_enable);
348
349 uhci_scan_schedule(uhci);
350 uhci_fsbr_off(uhci);
351}
352
353static void start_rh(struct uhci_hcd *uhci)
354{
355 uhci_to_hcd(uhci)->state = HC_STATE_RUNNING;
356 uhci->is_stopped = 0;
357
358
359
360
361 outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, uhci->io_addr + USBCMD);
362 outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
363 uhci->io_addr + USBINTR);
364 mb();
365 uhci->rh_state = UHCI_RH_RUNNING;
366 uhci_to_hcd(uhci)->poll_rh = 1;
367}
368
369static void wakeup_rh(struct uhci_hcd *uhci)
370__releases(uhci->lock)
371__acquires(uhci->lock)
372{
373 dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
374 "%s%s\n", __func__,
375 uhci->rh_state == UHCI_RH_AUTO_STOPPED ?
376 " (auto-start)" : "");
377
378
379
380
381
382 if (uhci->rh_state == UHCI_RH_SUSPENDED) {
383 unsigned egsm;
384
385
386 egsm = inw(uhci->io_addr + USBCMD) & USBCMD_EGSM;
387 uhci->rh_state = UHCI_RH_RESUMING;
388 outw(USBCMD_FGR | USBCMD_CF | egsm, uhci->io_addr + USBCMD);
389 spin_unlock_irq(&uhci->lock);
390 msleep(20);
391 spin_lock_irq(&uhci->lock);
392 if (uhci->dead)
393 return;
394
395
396 outw(USBCMD_CF, uhci->io_addr + USBCMD);
397 mb();
398 udelay(4);
399 if (inw(uhci->io_addr + USBCMD) & USBCMD_FGR)
400 dev_warn(uhci_dev(uhci), "FGR not stopped yet!\n");
401 }
402
403 start_rh(uhci);
404
405
406 mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies);
407}
408
409static irqreturn_t uhci_irq(struct usb_hcd *hcd)
410{
411 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
412 unsigned short status;
413
414
415
416
417
418
419 status = inw(uhci->io_addr + USBSTS);
420 if (!(status & ~USBSTS_HCH))
421 return IRQ_NONE;
422 outw(status, uhci->io_addr + USBSTS);
423
424 if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
425 if (status & USBSTS_HSE)
426 dev_err(uhci_dev(uhci), "host system error, "
427 "PCI problems?\n");
428 if (status & USBSTS_HCPE)
429 dev_err(uhci_dev(uhci), "host controller process "
430 "error, something bad happened!\n");
431 if (status & USBSTS_HCH) {
432 spin_lock(&uhci->lock);
433 if (uhci->rh_state >= UHCI_RH_RUNNING) {
434 dev_err(uhci_dev(uhci),
435 "host controller halted, "
436 "very bad!\n");
437 if (debug > 1 && errbuf) {
438
439 uhci_sprint_schedule(uhci,
440 errbuf, ERRBUF_LEN);
441 lprintk(errbuf);
442 }
443 uhci_hc_died(uhci);
444
445
446
447 mod_timer(&hcd->rh_timer, jiffies);
448 }
449 spin_unlock(&uhci->lock);
450 }
451 }
452
453 if (status & USBSTS_RD)
454 usb_hcd_poll_rh_status(hcd);
455 else {
456 spin_lock(&uhci->lock);
457 uhci_scan_schedule(uhci);
458 spin_unlock(&uhci->lock);
459 }
460
461 return IRQ_HANDLED;
462}
463
464
465
466
467
468
469
470
471
472static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
473{
474 if (!uhci->is_stopped) {
475 unsigned delta;
476
477 delta = (inw(uhci->io_addr + USBFRNUM) - uhci->frame_number) &
478 (UHCI_NUMFRAMES - 1);
479 uhci->frame_number += delta;
480 }
481}
482
483
484
485
486static void release_uhci(struct uhci_hcd *uhci)
487{
488 int i;
489
490 if (DEBUG_CONFIGURED) {
491 spin_lock_irq(&uhci->lock);
492 uhci->is_initialized = 0;
493 spin_unlock_irq(&uhci->lock);
494
495 debugfs_remove(uhci->dentry);
496 }
497
498 for (i = 0; i < UHCI_NUM_SKELQH; i++)
499 uhci_free_qh(uhci, uhci->skelqh[i]);
500
501 uhci_free_td(uhci, uhci->term_td);
502
503 dma_pool_destroy(uhci->qh_pool);
504
505 dma_pool_destroy(uhci->td_pool);
506
507 kfree(uhci->frame_cpu);
508
509 dma_free_coherent(uhci_dev(uhci),
510 UHCI_NUMFRAMES * sizeof(*uhci->frame),
511 uhci->frame, uhci->frame_dma_handle);
512}
513
514static int uhci_init(struct usb_hcd *hcd)
515{
516 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
517 unsigned io_size = (unsigned) hcd->rsrc_len;
518 int port;
519
520 uhci->io_addr = (unsigned long) hcd->rsrc_start;
521
522
523
524
525
526
527
528
529
530 for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) {
531 unsigned int portstatus;
532
533 portstatus = inw(uhci->io_addr + USBPORTSC1 + (port * 2));
534 if (!(portstatus & 0x0080) || portstatus == 0xffff)
535 break;
536 }
537 if (debug)
538 dev_info(uhci_dev(uhci), "detected %d ports\n", port);
539
540
541 if (port > UHCI_RH_MAXCHILD) {
542 dev_info(uhci_dev(uhci), "port count misdetected? "
543 "forcing to 2 ports\n");
544 port = 2;
545 }
546 uhci->rh_numports = port;
547
548
549
550
551 check_and_reset_hc(uhci);
552 return 0;
553}
554
555
556
557
558
559
560
561
562static void uhci_shutdown(struct pci_dev *pdev)
563{
564 struct usb_hcd *hcd = (struct usb_hcd *) pci_get_drvdata(pdev);
565
566 uhci_hc_died(hcd_to_uhci(hcd));
567}
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587static int uhci_start(struct usb_hcd *hcd)
588{
589 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
590 int retval = -EBUSY;
591 int i;
592 struct dentry *dentry;
593
594 hcd->uses_new_polling = 1;
595
596 spin_lock_init(&uhci->lock);
597 setup_timer(&uhci->fsbr_timer, uhci_fsbr_timeout,
598 (unsigned long) uhci);
599 INIT_LIST_HEAD(&uhci->idle_qh_list);
600 init_waitqueue_head(&uhci->waitqh);
601
602 if (DEBUG_CONFIGURED) {
603 dentry = debugfs_create_file(hcd->self.bus_name,
604 S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root,
605 uhci, &uhci_debug_operations);
606 if (!dentry) {
607 dev_err(uhci_dev(uhci), "couldn't create uhci "
608 "debugfs entry\n");
609 retval = -ENOMEM;
610 goto err_create_debug_entry;
611 }
612 uhci->dentry = dentry;
613 }
614
615 uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
616 UHCI_NUMFRAMES * sizeof(*uhci->frame),
617 &uhci->frame_dma_handle, 0);
618 if (!uhci->frame) {
619 dev_err(uhci_dev(uhci), "unable to allocate "
620 "consistent memory for frame list\n");
621 goto err_alloc_frame;
622 }
623 memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame));
624
625 uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
626 GFP_KERNEL);
627 if (!uhci->frame_cpu) {
628 dev_err(uhci_dev(uhci), "unable to allocate "
629 "memory for frame pointers\n");
630 goto err_alloc_frame_cpu;
631 }
632
633 uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci),
634 sizeof(struct uhci_td), 16, 0);
635 if (!uhci->td_pool) {
636 dev_err(uhci_dev(uhci), "unable to create td dma_pool\n");
637 goto err_create_td_pool;
638 }
639
640 uhci->qh_pool = dma_pool_create("uhci_qh", uhci_dev(uhci),
641 sizeof(struct uhci_qh), 16, 0);
642 if (!uhci->qh_pool) {
643 dev_err(uhci_dev(uhci), "unable to create qh dma_pool\n");
644 goto err_create_qh_pool;
645 }
646
647 uhci->term_td = uhci_alloc_td(uhci);
648 if (!uhci->term_td) {
649 dev_err(uhci_dev(uhci), "unable to allocate terminating TD\n");
650 goto err_alloc_term_td;
651 }
652
653 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
654 uhci->skelqh[i] = uhci_alloc_qh(uhci, NULL, NULL);
655 if (!uhci->skelqh[i]) {
656 dev_err(uhci_dev(uhci), "unable to allocate QH\n");
657 goto err_alloc_skelqh;
658 }
659 }
660
661
662
663
664 for (i = SKEL_ISO + 1; i < SKEL_ASYNC; ++i)
665 uhci->skelqh[i]->link = LINK_TO_QH(uhci->skel_async_qh);
666 uhci->skel_async_qh->link = UHCI_PTR_TERM;
667 uhci->skel_term_qh->link = LINK_TO_QH(uhci->skel_term_qh);
668
669
670 uhci_fill_td(uhci->term_td, 0, uhci_explen(0) |
671 (0x7f << TD_TOKEN_DEVADDR_SHIFT) | USB_PID_IN, 0);
672 uhci->term_td->link = UHCI_PTR_TERM;
673 uhci->skel_async_qh->element = uhci->skel_term_qh->element =
674 LINK_TO_TD(uhci->term_td);
675
676
677
678
679
680 for (i = 0; i < UHCI_NUMFRAMES; i++) {
681
682
683 uhci->frame[i] = uhci_frame_skel_link(uhci, i);
684 }
685
686
687
688
689
690 mb();
691
692 configure_hc(uhci);
693 uhci->is_initialized = 1;
694 start_rh(uhci);
695 return 0;
696
697
698
699
700err_alloc_skelqh:
701 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
702 if (uhci->skelqh[i])
703 uhci_free_qh(uhci, uhci->skelqh[i]);
704 }
705
706 uhci_free_td(uhci, uhci->term_td);
707
708err_alloc_term_td:
709 dma_pool_destroy(uhci->qh_pool);
710
711err_create_qh_pool:
712 dma_pool_destroy(uhci->td_pool);
713
714err_create_td_pool:
715 kfree(uhci->frame_cpu);
716
717err_alloc_frame_cpu:
718 dma_free_coherent(uhci_dev(uhci),
719 UHCI_NUMFRAMES * sizeof(*uhci->frame),
720 uhci->frame, uhci->frame_dma_handle);
721
722err_alloc_frame:
723 debugfs_remove(uhci->dentry);
724
725err_create_debug_entry:
726 return retval;
727}
728
729static void uhci_stop(struct usb_hcd *hcd)
730{
731 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
732
733 spin_lock_irq(&uhci->lock);
734 if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) && !uhci->dead)
735 uhci_hc_died(uhci);
736 uhci_scan_schedule(uhci);
737 spin_unlock_irq(&uhci->lock);
738
739 del_timer_sync(&uhci->fsbr_timer);
740 release_uhci(uhci);
741}
742
743#ifdef CONFIG_PM
744static int uhci_rh_suspend(struct usb_hcd *hcd)
745{
746 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
747 int rc = 0;
748
749 spin_lock_irq(&uhci->lock);
750 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
751 rc = -ESHUTDOWN;
752 else if (!uhci->dead)
753 suspend_rh(uhci, UHCI_RH_SUSPENDED);
754 spin_unlock_irq(&uhci->lock);
755 return rc;
756}
757
758static int uhci_rh_resume(struct usb_hcd *hcd)
759{
760 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
761 int rc = 0;
762
763 spin_lock_irq(&uhci->lock);
764 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
765 rc = -ESHUTDOWN;
766 else if (!uhci->dead)
767 wakeup_rh(uhci);
768 spin_unlock_irq(&uhci->lock);
769 return rc;
770}
771
772static int uhci_pci_suspend(struct usb_hcd *hcd)
773{
774 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
775 int rc = 0;
776
777 dev_dbg(uhci_dev(uhci), "%s\n", __func__);
778
779 spin_lock_irq(&uhci->lock);
780 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) || uhci->dead)
781 goto done_okay;
782
783 if (uhci->rh_state > UHCI_RH_SUSPENDED) {
784 dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
785 rc = -EBUSY;
786 goto done;
787 };
788
789
790
791
792 pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0);
793 mb();
794 hcd->poll_rh = 0;
795
796
797
798done_okay:
799 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
800done:
801 spin_unlock_irq(&uhci->lock);
802 return rc;
803}
804
805static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
806{
807 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
808
809 dev_dbg(uhci_dev(uhci), "%s\n", __func__);
810
811
812
813
814 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
815 mb();
816
817 spin_lock_irq(&uhci->lock);
818
819
820 if (hibernated)
821 uhci_hc_died(uhci);
822
823
824
825
826
827
828
829 check_and_reset_hc(uhci);
830
831
832 configure_hc(uhci);
833
834 if (uhci->rh_state == UHCI_RH_RESET) {
835
836
837 usb_root_hub_lost_power(hcd->self.root_hub);
838 suspend_rh(uhci, UHCI_RH_SUSPENDED);
839 }
840
841 spin_unlock_irq(&uhci->lock);
842
843
844
845
846 if (!uhci->RD_enable && hcd->self.root_hub->do_remote_wakeup) {
847 hcd->poll_rh = 1;
848 usb_hcd_poll_rh_status(hcd);
849 }
850 return 0;
851}
852#endif
853
854
855static void uhci_hcd_endpoint_disable(struct usb_hcd *hcd,
856 struct usb_host_endpoint *hep)
857{
858 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
859 struct uhci_qh *qh;
860
861 spin_lock_irq(&uhci->lock);
862 qh = (struct uhci_qh *) hep->hcpriv;
863 if (qh == NULL)
864 goto done;
865
866 while (qh->state != QH_STATE_IDLE) {
867 ++uhci->num_waiting;
868 spin_unlock_irq(&uhci->lock);
869 wait_event_interruptible(uhci->waitqh,
870 qh->state == QH_STATE_IDLE);
871 spin_lock_irq(&uhci->lock);
872 --uhci->num_waiting;
873 }
874
875 uhci_free_qh(uhci, qh);
876done:
877 spin_unlock_irq(&uhci->lock);
878}
879
880static int uhci_hcd_get_frame_number(struct usb_hcd *hcd)
881{
882 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
883 unsigned frame_number;
884 unsigned delta;
885
886
887 frame_number = uhci->frame_number;
888 barrier();
889 delta = (inw(uhci->io_addr + USBFRNUM) - frame_number) &
890 (UHCI_NUMFRAMES - 1);
891 return frame_number + delta;
892}
893
894static const char hcd_name[] = "uhci_hcd";
895
896static const struct hc_driver uhci_driver = {
897 .description = hcd_name,
898 .product_desc = "UHCI Host Controller",
899 .hcd_priv_size = sizeof(struct uhci_hcd),
900
901
902 .irq = uhci_irq,
903 .flags = HCD_USB11,
904
905
906 .reset = uhci_init,
907 .start = uhci_start,
908#ifdef CONFIG_PM
909 .pci_suspend = uhci_pci_suspend,
910 .pci_resume = uhci_pci_resume,
911 .bus_suspend = uhci_rh_suspend,
912 .bus_resume = uhci_rh_resume,
913#endif
914 .stop = uhci_stop,
915
916 .urb_enqueue = uhci_urb_enqueue,
917 .urb_dequeue = uhci_urb_dequeue,
918
919 .endpoint_disable = uhci_hcd_endpoint_disable,
920 .get_frame_number = uhci_hcd_get_frame_number,
921
922 .hub_status_data = uhci_hub_status_data,
923 .hub_control = uhci_hub_control,
924};
925
926static const struct pci_device_id uhci_pci_ids[] = { {
927
928 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0),
929 .driver_data = (unsigned long) &uhci_driver,
930 }, { }
931};
932
933MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
934
935static struct pci_driver uhci_pci_driver = {
936 .name = (char *)hcd_name,
937 .id_table = uhci_pci_ids,
938
939 .probe = usb_hcd_pci_probe,
940 .remove = usb_hcd_pci_remove,
941 .shutdown = uhci_shutdown,
942
943#ifdef CONFIG_PM_SLEEP
944 .driver = {
945 .pm = &usb_hcd_pci_pm_ops
946 },
947#endif
948};
949
950static int __init uhci_hcd_init(void)
951{
952 int retval = -ENOMEM;
953
954 if (usb_disabled())
955 return -ENODEV;
956
957 printk(KERN_INFO "uhci_hcd: " DRIVER_DESC "%s\n",
958 ignore_oc ? ", overcurrent ignored" : "");
959 set_bit(USB_UHCI_LOADED, &usb_hcds_loaded);
960
961 if (DEBUG_CONFIGURED) {
962 errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
963 if (!errbuf)
964 goto errbuf_failed;
965 uhci_debugfs_root = debugfs_create_dir("uhci", usb_debug_root);
966 if (!uhci_debugfs_root)
967 goto debug_failed;
968 }
969
970 uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
971 sizeof(struct urb_priv), 0, 0, NULL);
972 if (!uhci_up_cachep)
973 goto up_failed;
974
975 retval = pci_register_driver(&uhci_pci_driver);
976 if (retval)
977 goto init_failed;
978
979 return 0;
980
981init_failed:
982 kmem_cache_destroy(uhci_up_cachep);
983
984up_failed:
985 debugfs_remove(uhci_debugfs_root);
986
987debug_failed:
988 kfree(errbuf);
989
990errbuf_failed:
991
992 clear_bit(USB_UHCI_LOADED, &usb_hcds_loaded);
993 return retval;
994}
995
996static void __exit uhci_hcd_cleanup(void)
997{
998 pci_unregister_driver(&uhci_pci_driver);
999 kmem_cache_destroy(uhci_up_cachep);
1000 debugfs_remove(uhci_debugfs_root);
1001 kfree(errbuf);
1002 clear_bit(USB_UHCI_LOADED, &usb_hcds_loaded);
1003}
1004
1005module_init(uhci_hcd_init);
1006module_exit(uhci_hcd_cleanup);
1007
1008MODULE_AUTHOR(DRIVER_AUTHOR);
1009MODULE_DESCRIPTION(DRIVER_DESC);
1010MODULE_LICENSE("GPL");
1011