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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/usb/hcd.h>
42#include <linux/bitops.h>
43#include <linux/dmi.h>
44
45#include <asm/uaccess.h>
46#include <asm/io.h>
47#include <asm/irq.h>
48
49#include "uhci-hcd.h"
50
51
52
53
54#define DRIVER_AUTHOR \
55 "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, " \
56 "Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, " \
57 "Roman Weissgaerber, Alan Stern"
58#define DRIVER_DESC "USB Universal Host Controller Interface driver"
59
60
61static bool ignore_oc;
62module_param(ignore_oc, bool, S_IRUGO);
63MODULE_PARM_DESC(ignore_oc, "ignore hardware overcurrent indications");
64
65
66
67
68
69
70
71
72#ifdef CONFIG_DYNAMIC_DEBUG
73
74static int debug = 1;
75module_param(debug, int, S_IRUGO | S_IWUSR);
76MODULE_PARM_DESC(debug, "Debug level");
77static char *errbuf;
78
79#else
80
81#define debug 0
82#define errbuf NULL
83
84#endif
85
86
87#define ERRBUF_LEN (32 * 1024)
88
89static struct kmem_cache *uhci_up_cachep;
90
91static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state);
92static void wakeup_rh(struct uhci_hcd *uhci);
93static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
94
95
96
97
98static __hc32 uhci_frame_skel_link(struct uhci_hcd *uhci, int frame)
99{
100 int skelnum;
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117 skelnum = 8 - (int) __ffs(frame | UHCI_NUMFRAMES);
118 if (skelnum <= 1)
119 skelnum = 9;
120 return LINK_TO_QH(uhci, uhci->skelqh[skelnum]);
121}
122
123#include "uhci-debug.c"
124#include "uhci-q.c"
125#include "uhci-hub.c"
126
127
128
129
130static void finish_reset(struct uhci_hcd *uhci)
131{
132 int port;
133
134
135
136
137
138 for (port = 0; port < uhci->rh_numports; ++port)
139 uhci_writew(uhci, 0, USBPORTSC1 + (port * 2));
140
141 uhci->port_c_suspend = uhci->resuming_ports = 0;
142 uhci->rh_state = UHCI_RH_RESET;
143 uhci->is_stopped = UHCI_IS_STOPPED;
144 clear_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags);
145}
146
147
148
149
150
151static void uhci_hc_died(struct uhci_hcd *uhci)
152{
153 uhci_get_current_frame_number(uhci);
154 uhci->reset_hc(uhci);
155 finish_reset(uhci);
156 uhci->dead = 1;
157
158
159 ++uhci->frame_number;
160}
161
162
163
164
165
166
167static void check_and_reset_hc(struct uhci_hcd *uhci)
168{
169 if (uhci->check_and_reset_hc(uhci))
170 finish_reset(uhci);
171}
172
173#if defined(CONFIG_USB_UHCI_SUPPORT_NON_PCI_HC)
174
175
176
177
178
179
180
181
182
183
184static void uhci_generic_reset_hc(struct uhci_hcd *uhci)
185{
186
187
188
189
190
191 uhci_writew(uhci, USBCMD_HCRESET, USBCMD);
192 mb();
193 udelay(5);
194 if (uhci_readw(uhci, USBCMD) & USBCMD_HCRESET)
195 dev_warn(uhci_dev(uhci), "HCRESET not completed yet!\n");
196
197
198
199
200 uhci_writew(uhci, 0, USBINTR);
201 uhci_writew(uhci, 0, USBCMD);
202}
203
204
205
206
207
208
209
210static int uhci_generic_check_and_reset_hc(struct uhci_hcd *uhci)
211{
212 unsigned int cmd, intr;
213
214
215
216
217
218
219
220
221
222
223
224 cmd = uhci_readw(uhci, USBCMD);
225 if ((cmd & USBCMD_RS) || !(cmd & USBCMD_CF) || !(cmd & USBCMD_EGSM)) {
226 dev_dbg(uhci_dev(uhci), "%s: cmd = 0x%04x\n",
227 __func__, cmd);
228 goto reset_needed;
229 }
230
231 intr = uhci_readw(uhci, USBINTR);
232 if (intr & (~USBINTR_RESUME)) {
233 dev_dbg(uhci_dev(uhci), "%s: intr = 0x%04x\n",
234 __func__, intr);
235 goto reset_needed;
236 }
237 return 0;
238
239reset_needed:
240 dev_dbg(uhci_dev(uhci), "Performing full reset\n");
241 uhci_generic_reset_hc(uhci);
242 return 1;
243}
244#endif
245
246
247
248
249static void configure_hc(struct uhci_hcd *uhci)
250{
251
252 uhci_writeb(uhci, USBSOF_DEFAULT, USBSOF);
253
254
255 uhci_writel(uhci, uhci->frame_dma_handle, USBFLBASEADD);
256
257
258 uhci_writew(uhci, uhci->frame_number & UHCI_MAX_SOF_NUMBER,
259 USBFRNUM);
260
261
262 if (uhci->configure_hc)
263 uhci->configure_hc(uhci);
264}
265
266static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
267{
268
269
270 if (ignore_oc)
271 return 1;
272
273 return uhci->resume_detect_interrupts_are_broken ?
274 uhci->resume_detect_interrupts_are_broken(uhci) : 0;
275}
276
277static int global_suspend_mode_is_broken(struct uhci_hcd *uhci)
278{
279 return uhci->global_suspend_mode_is_broken ?
280 uhci->global_suspend_mode_is_broken(uhci) : 0;
281}
282
283static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state)
284__releases(uhci->lock)
285__acquires(uhci->lock)
286{
287 int auto_stop;
288 int int_enable, egsm_enable, wakeup_enable;
289 struct usb_device *rhdev = uhci_to_hcd(uhci)->self.root_hub;
290
291 auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
292 dev_dbg(&rhdev->dev, "%s%s\n", __func__,
293 (auto_stop ? " (auto-stop)" : ""));
294
295
296
297
298 egsm_enable = USBCMD_EGSM;
299 int_enable = USBINTR_RESUME;
300 wakeup_enable = 1;
301
302
303
304
305
306
307 if (auto_stop) {
308 if (!device_may_wakeup(&rhdev->dev))
309 egsm_enable = int_enable = 0;
310 }
311
312#ifdef CONFIG_PM
313
314
315
316
317 else {
318 if (!rhdev->do_remote_wakeup)
319 wakeup_enable = 0;
320 }
321#endif
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338 if (!wakeup_enable || global_suspend_mode_is_broken(uhci) ||
339 resume_detect_interrupts_are_broken(uhci))
340 egsm_enable = int_enable = 0;
341
342 uhci->RD_enable = !!int_enable;
343 uhci_writew(uhci, int_enable, USBINTR);
344 uhci_writew(uhci, egsm_enable | USBCMD_CF, USBCMD);
345 mb();
346 udelay(5);
347
348
349
350
351
352
353 if (!auto_stop && !(uhci_readw(uhci, USBSTS) & USBSTS_HCH)) {
354 uhci->rh_state = UHCI_RH_SUSPENDING;
355 spin_unlock_irq(&uhci->lock);
356 msleep(1);
357 spin_lock_irq(&uhci->lock);
358 if (uhci->dead)
359 return;
360 }
361 if (!(uhci_readw(uhci, USBSTS) & USBSTS_HCH))
362 dev_warn(uhci_dev(uhci), "Controller not stopped yet!\n");
363
364 uhci_get_current_frame_number(uhci);
365
366 uhci->rh_state = new_state;
367 uhci->is_stopped = UHCI_IS_STOPPED;
368
369
370
371
372
373
374 if (wakeup_enable && (!int_enable || !egsm_enable))
375 set_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags);
376 else
377 clear_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags);
378
379 uhci_scan_schedule(uhci);
380 uhci_fsbr_off(uhci);
381}
382
383static void start_rh(struct uhci_hcd *uhci)
384{
385 uhci->is_stopped = 0;
386
387
388
389
390 uhci_writew(uhci, USBCMD_RS | USBCMD_CF | USBCMD_MAXP, USBCMD);
391 uhci_writew(uhci, USBINTR_TIMEOUT | USBINTR_RESUME |
392 USBINTR_IOC | USBINTR_SP, USBINTR);
393 mb();
394 uhci->rh_state = UHCI_RH_RUNNING;
395 set_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags);
396}
397
398static void wakeup_rh(struct uhci_hcd *uhci)
399__releases(uhci->lock)
400__acquires(uhci->lock)
401{
402 dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
403 "%s%s\n", __func__,
404 uhci->rh_state == UHCI_RH_AUTO_STOPPED ?
405 " (auto-start)" : "");
406
407
408
409
410
411 if (uhci->rh_state == UHCI_RH_SUSPENDED) {
412 unsigned egsm;
413
414
415 egsm = uhci_readw(uhci, USBCMD) & USBCMD_EGSM;
416 uhci->rh_state = UHCI_RH_RESUMING;
417 uhci_writew(uhci, USBCMD_FGR | USBCMD_CF | egsm, USBCMD);
418 spin_unlock_irq(&uhci->lock);
419 msleep(20);
420 spin_lock_irq(&uhci->lock);
421 if (uhci->dead)
422 return;
423
424
425 uhci_writew(uhci, USBCMD_CF, USBCMD);
426 mb();
427 udelay(4);
428 if (uhci_readw(uhci, USBCMD) & USBCMD_FGR)
429 dev_warn(uhci_dev(uhci), "FGR not stopped yet!\n");
430 }
431
432 start_rh(uhci);
433
434
435 mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies);
436}
437
438static irqreturn_t uhci_irq(struct usb_hcd *hcd)
439{
440 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
441 unsigned short status;
442
443
444
445
446
447
448 status = uhci_readw(uhci, USBSTS);
449 if (!(status & ~USBSTS_HCH))
450 return IRQ_NONE;
451 uhci_writew(uhci, status, USBSTS);
452
453 spin_lock(&uhci->lock);
454 if (unlikely(!uhci->is_initialized))
455 goto done;
456
457 if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
458 if (status & USBSTS_HSE)
459 dev_err(uhci_dev(uhci),
460 "host system error, PCI problems?\n");
461 if (status & USBSTS_HCPE)
462 dev_err(uhci_dev(uhci),
463 "host controller process error, something bad happened!\n");
464 if (status & USBSTS_HCH) {
465 if (uhci->rh_state >= UHCI_RH_RUNNING) {
466 dev_err(uhci_dev(uhci),
467 "host controller halted, very bad!\n");
468 if (debug > 1 && errbuf) {
469
470 uhci_sprint_schedule(uhci, errbuf,
471 ERRBUF_LEN - EXTRA_SPACE);
472 lprintk(errbuf);
473 }
474 uhci_hc_died(uhci);
475 usb_hc_died(hcd);
476
477
478
479 mod_timer(&hcd->rh_timer, jiffies);
480 }
481 }
482 }
483
484 if (status & USBSTS_RD) {
485 spin_unlock(&uhci->lock);
486 usb_hcd_poll_rh_status(hcd);
487 } else {
488 uhci_scan_schedule(uhci);
489 done:
490 spin_unlock(&uhci->lock);
491 }
492
493 return IRQ_HANDLED;
494}
495
496
497
498
499
500
501
502
503
504static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
505{
506 if (!uhci->is_stopped) {
507 unsigned delta;
508
509 delta = (uhci_readw(uhci, USBFRNUM) - uhci->frame_number) &
510 (UHCI_NUMFRAMES - 1);
511 uhci->frame_number += delta;
512 }
513}
514
515
516
517
518static void release_uhci(struct uhci_hcd *uhci)
519{
520 int i;
521
522
523 spin_lock_irq(&uhci->lock);
524 uhci->is_initialized = 0;
525 spin_unlock_irq(&uhci->lock);
526
527 debugfs_remove(uhci->dentry);
528
529 for (i = 0; i < UHCI_NUM_SKELQH; i++)
530 uhci_free_qh(uhci, uhci->skelqh[i]);
531
532 uhci_free_td(uhci, uhci->term_td);
533
534 dma_pool_destroy(uhci->qh_pool);
535
536 dma_pool_destroy(uhci->td_pool);
537
538 kfree(uhci->frame_cpu);
539
540 dma_free_coherent(uhci_dev(uhci),
541 UHCI_NUMFRAMES * sizeof(*uhci->frame),
542 uhci->frame, uhci->frame_dma_handle);
543}
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563static int uhci_start(struct usb_hcd *hcd)
564{
565 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
566 int retval = -EBUSY;
567 int i;
568 struct dentry __maybe_unused *dentry;
569
570 hcd->uses_new_polling = 1;
571
572 if (!(hcd->driver->flags & HCD_LOCAL_MEM))
573 hcd->self.sg_tablesize = ~0;
574
575 spin_lock_init(&uhci->lock);
576 setup_timer(&uhci->fsbr_timer, uhci_fsbr_timeout,
577 (unsigned long) uhci);
578 INIT_LIST_HEAD(&uhci->idle_qh_list);
579 init_waitqueue_head(&uhci->waitqh);
580
581#ifdef UHCI_DEBUG_OPS
582 dentry = debugfs_create_file(hcd->self.bus_name,
583 S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root,
584 uhci, &uhci_debug_operations);
585 if (!dentry) {
586 dev_err(uhci_dev(uhci), "couldn't create uhci debugfs entry\n");
587 return -ENOMEM;
588 }
589 uhci->dentry = dentry;
590#endif
591
592 uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
593 UHCI_NUMFRAMES * sizeof(*uhci->frame),
594 &uhci->frame_dma_handle, GFP_KERNEL);
595 if (!uhci->frame) {
596 dev_err(uhci_dev(uhci),
597 "unable to allocate consistent memory for frame list\n");
598 goto err_alloc_frame;
599 }
600 memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame));
601
602 uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
603 GFP_KERNEL);
604 if (!uhci->frame_cpu) {
605 dev_err(uhci_dev(uhci),
606 "unable to allocate memory for frame pointers\n");
607 goto err_alloc_frame_cpu;
608 }
609
610 uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci),
611 sizeof(struct uhci_td), 16, 0);
612 if (!uhci->td_pool) {
613 dev_err(uhci_dev(uhci), "unable to create td dma_pool\n");
614 goto err_create_td_pool;
615 }
616
617 uhci->qh_pool = dma_pool_create("uhci_qh", uhci_dev(uhci),
618 sizeof(struct uhci_qh), 16, 0);
619 if (!uhci->qh_pool) {
620 dev_err(uhci_dev(uhci), "unable to create qh dma_pool\n");
621 goto err_create_qh_pool;
622 }
623
624 uhci->term_td = uhci_alloc_td(uhci);
625 if (!uhci->term_td) {
626 dev_err(uhci_dev(uhci), "unable to allocate terminating TD\n");
627 goto err_alloc_term_td;
628 }
629
630 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
631 uhci->skelqh[i] = uhci_alloc_qh(uhci, NULL, NULL);
632 if (!uhci->skelqh[i]) {
633 dev_err(uhci_dev(uhci), "unable to allocate QH\n");
634 goto err_alloc_skelqh;
635 }
636 }
637
638
639
640
641 for (i = SKEL_ISO + 1; i < SKEL_ASYNC; ++i)
642 uhci->skelqh[i]->link = LINK_TO_QH(uhci, uhci->skel_async_qh);
643 uhci->skel_async_qh->link = UHCI_PTR_TERM(uhci);
644 uhci->skel_term_qh->link = LINK_TO_QH(uhci, uhci->skel_term_qh);
645
646
647 uhci_fill_td(uhci, uhci->term_td, 0, uhci_explen(0) |
648 (0x7f << TD_TOKEN_DEVADDR_SHIFT) | USB_PID_IN, 0);
649 uhci->term_td->link = UHCI_PTR_TERM(uhci);
650 uhci->skel_async_qh->element = uhci->skel_term_qh->element =
651 LINK_TO_TD(uhci, uhci->term_td);
652
653
654
655
656
657 for (i = 0; i < UHCI_NUMFRAMES; i++) {
658
659
660 uhci->frame[i] = uhci_frame_skel_link(uhci, i);
661 }
662
663
664
665
666
667 mb();
668
669 spin_lock_irq(&uhci->lock);
670 configure_hc(uhci);
671 uhci->is_initialized = 1;
672 start_rh(uhci);
673 spin_unlock_irq(&uhci->lock);
674 return 0;
675
676
677
678
679err_alloc_skelqh:
680 for (i = 0; i < UHCI_NUM_SKELQH; i++) {
681 if (uhci->skelqh[i])
682 uhci_free_qh(uhci, uhci->skelqh[i]);
683 }
684
685 uhci_free_td(uhci, uhci->term_td);
686
687err_alloc_term_td:
688 dma_pool_destroy(uhci->qh_pool);
689
690err_create_qh_pool:
691 dma_pool_destroy(uhci->td_pool);
692
693err_create_td_pool:
694 kfree(uhci->frame_cpu);
695
696err_alloc_frame_cpu:
697 dma_free_coherent(uhci_dev(uhci),
698 UHCI_NUMFRAMES * sizeof(*uhci->frame),
699 uhci->frame, uhci->frame_dma_handle);
700
701err_alloc_frame:
702 debugfs_remove(uhci->dentry);
703
704 return retval;
705}
706
707static void uhci_stop(struct usb_hcd *hcd)
708{
709 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
710
711 spin_lock_irq(&uhci->lock);
712 if (HCD_HW_ACCESSIBLE(hcd) && !uhci->dead)
713 uhci_hc_died(uhci);
714 uhci_scan_schedule(uhci);
715 spin_unlock_irq(&uhci->lock);
716 synchronize_irq(hcd->irq);
717
718 del_timer_sync(&uhci->fsbr_timer);
719 release_uhci(uhci);
720}
721
722#ifdef CONFIG_PM
723static int uhci_rh_suspend(struct usb_hcd *hcd)
724{
725 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
726 int rc = 0;
727
728 spin_lock_irq(&uhci->lock);
729 if (!HCD_HW_ACCESSIBLE(hcd))
730 rc = -ESHUTDOWN;
731 else if (uhci->dead)
732 ;
733
734
735
736
737
738
739 else if (hcd->self.root_hub->do_remote_wakeup &&
740 uhci->resuming_ports) {
741 dev_dbg(uhci_dev(uhci),
742 "suspend failed because a port is resuming\n");
743 rc = -EBUSY;
744 } else
745 suspend_rh(uhci, UHCI_RH_SUSPENDED);
746 spin_unlock_irq(&uhci->lock);
747 return rc;
748}
749
750static int uhci_rh_resume(struct usb_hcd *hcd)
751{
752 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
753 int rc = 0;
754
755 spin_lock_irq(&uhci->lock);
756 if (!HCD_HW_ACCESSIBLE(hcd))
757 rc = -ESHUTDOWN;
758 else if (!uhci->dead)
759 wakeup_rh(uhci);
760 spin_unlock_irq(&uhci->lock);
761 return rc;
762}
763
764#endif
765
766
767static void uhci_hcd_endpoint_disable(struct usb_hcd *hcd,
768 struct usb_host_endpoint *hep)
769{
770 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
771 struct uhci_qh *qh;
772
773 spin_lock_irq(&uhci->lock);
774 qh = (struct uhci_qh *) hep->hcpriv;
775 if (qh == NULL)
776 goto done;
777
778 while (qh->state != QH_STATE_IDLE) {
779 ++uhci->num_waiting;
780 spin_unlock_irq(&uhci->lock);
781 wait_event_interruptible(uhci->waitqh,
782 qh->state == QH_STATE_IDLE);
783 spin_lock_irq(&uhci->lock);
784 --uhci->num_waiting;
785 }
786
787 uhci_free_qh(uhci, qh);
788done:
789 spin_unlock_irq(&uhci->lock);
790}
791
792static int uhci_hcd_get_frame_number(struct usb_hcd *hcd)
793{
794 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
795 unsigned frame_number;
796 unsigned delta;
797
798
799 frame_number = uhci->frame_number;
800 barrier();
801 delta = (uhci_readw(uhci, USBFRNUM) - frame_number) &
802 (UHCI_NUMFRAMES - 1);
803 return frame_number + delta;
804}
805
806
807static int uhci_count_ports(struct usb_hcd *hcd)
808{
809 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
810 unsigned io_size = (unsigned) hcd->rsrc_len;
811 int port;
812
813
814
815
816
817
818
819
820
821 for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) {
822 unsigned int portstatus;
823
824 portstatus = uhci_readw(uhci, USBPORTSC1 + (port * 2));
825 if (!(portstatus & 0x0080) || portstatus == 0xffff)
826 break;
827 }
828 if (debug)
829 dev_info(uhci_dev(uhci), "detected %d ports\n", port);
830
831
832 if (port > UHCI_RH_MAXCHILD) {
833 dev_info(uhci_dev(uhci),
834 "port count misdetected? forcing to 2 ports\n");
835 port = 2;
836 }
837
838 return port;
839}
840
841static const char hcd_name[] = "uhci_hcd";
842
843#ifdef CONFIG_PCI
844#include "uhci-pci.c"
845#define PCI_DRIVER uhci_pci_driver
846#endif
847
848#ifdef CONFIG_SPARC_LEON
849#include "uhci-grlib.c"
850#define PLATFORM_DRIVER uhci_grlib_driver
851#endif
852
853#ifdef CONFIG_USB_UHCI_PLATFORM
854#include "uhci-platform.c"
855#define PLATFORM_DRIVER uhci_platform_driver
856#endif
857
858#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER)
859#error "missing bus glue for uhci-hcd"
860#endif
861
862static int __init uhci_hcd_init(void)
863{
864 int retval = -ENOMEM;
865
866 if (usb_disabled())
867 return -ENODEV;
868
869 printk(KERN_INFO "uhci_hcd: " DRIVER_DESC "%s\n",
870 ignore_oc ? ", overcurrent ignored" : "");
871 set_bit(USB_UHCI_LOADED, &usb_hcds_loaded);
872
873#ifdef CONFIG_DYNAMIC_DEBUG
874 errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
875 if (!errbuf)
876 goto errbuf_failed;
877 uhci_debugfs_root = debugfs_create_dir("uhci", usb_debug_root);
878 if (!uhci_debugfs_root)
879 goto debug_failed;
880#endif
881
882 uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
883 sizeof(struct urb_priv), 0, 0, NULL);
884 if (!uhci_up_cachep)
885 goto up_failed;
886
887#ifdef PLATFORM_DRIVER
888 retval = platform_driver_register(&PLATFORM_DRIVER);
889 if (retval < 0)
890 goto clean0;
891#endif
892
893#ifdef PCI_DRIVER
894 retval = pci_register_driver(&PCI_DRIVER);
895 if (retval < 0)
896 goto clean1;
897#endif
898
899 return 0;
900
901#ifdef PCI_DRIVER
902clean1:
903#endif
904#ifdef PLATFORM_DRIVER
905 platform_driver_unregister(&PLATFORM_DRIVER);
906clean0:
907#endif
908 kmem_cache_destroy(uhci_up_cachep);
909
910up_failed:
911#if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
912 debugfs_remove(uhci_debugfs_root);
913
914debug_failed:
915 kfree(errbuf);
916
917errbuf_failed:
918#endif
919
920 clear_bit(USB_UHCI_LOADED, &usb_hcds_loaded);
921 return retval;
922}
923
924static void __exit uhci_hcd_cleanup(void)
925{
926#ifdef PLATFORM_DRIVER
927 platform_driver_unregister(&PLATFORM_DRIVER);
928#endif
929#ifdef PCI_DRIVER
930 pci_unregister_driver(&PCI_DRIVER);
931#endif
932 kmem_cache_destroy(uhci_up_cachep);
933 debugfs_remove(uhci_debugfs_root);
934#ifdef CONFIG_DYNAMIC_DEBUG
935 kfree(errbuf);
936#endif
937 clear_bit(USB_UHCI_LOADED, &usb_hcds_loaded);
938}
939
940module_init(uhci_hcd_init);
941module_exit(uhci_hcd_cleanup);
942
943MODULE_AUTHOR(DRIVER_AUTHOR);
944MODULE_DESCRIPTION(DRIVER_DESC);
945MODULE_LICENSE("GPL");
946