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6#include <linux/kernel.h>
7#include <linux/module.h>
8#include <linux/pci.h>
9#include <linux/usb.h>
10#include <linux/usb/hcd.h>
11
12#include <asm/io.h>
13#include <asm/irq.h>
14
15#ifdef CONFIG_PPC_PMAC
16#include <asm/machdep.h>
17#include <asm/pmac_feature.h>
18#include <asm/prom.h>
19#endif
20
21#include "usb.h"
22
23
24
25
26
27
28
29
30
31static DECLARE_RWSEM(companions_rwsem);
32
33#define CL_UHCI PCI_CLASS_SERIAL_USB_UHCI
34#define CL_OHCI PCI_CLASS_SERIAL_USB_OHCI
35#define CL_EHCI PCI_CLASS_SERIAL_USB_EHCI
36
37static inline int is_ohci_or_uhci(struct pci_dev *pdev)
38{
39 return pdev->class == CL_OHCI || pdev->class == CL_UHCI;
40}
41
42typedef void (*companion_fn)(struct pci_dev *pdev, struct usb_hcd *hcd,
43 struct pci_dev *companion, struct usb_hcd *companion_hcd);
44
45
46static void for_each_companion(struct pci_dev *pdev, struct usb_hcd *hcd,
47 companion_fn fn)
48{
49 struct pci_dev *companion;
50 struct usb_hcd *companion_hcd;
51 unsigned int slot = PCI_SLOT(pdev->devfn);
52
53
54
55
56
57
58 companion = NULL;
59 for_each_pci_dev(companion) {
60 if (companion->bus != pdev->bus ||
61 PCI_SLOT(companion->devfn) != slot)
62 continue;
63
64
65
66
67
68 if (companion->class != CL_UHCI && companion->class != CL_OHCI &&
69 companion->class != CL_EHCI)
70 continue;
71
72 companion_hcd = pci_get_drvdata(companion);
73 if (!companion_hcd || !companion_hcd->self.root_hub)
74 continue;
75 fn(pdev, hcd, companion, companion_hcd);
76 }
77}
78
79
80
81
82
83
84
85static void ehci_pre_add(struct pci_dev *pdev, struct usb_hcd *hcd,
86 struct pci_dev *companion, struct usb_hcd *companion_hcd)
87{
88 struct usb_device *udev;
89
90 if (is_ohci_or_uhci(companion)) {
91 udev = companion_hcd->self.root_hub;
92 usb_lock_device(udev);
93 usb_set_configuration(udev, 0);
94 }
95}
96
97
98
99
100
101
102static void ehci_post_add(struct pci_dev *pdev, struct usb_hcd *hcd,
103 struct pci_dev *companion, struct usb_hcd *companion_hcd)
104{
105 struct usb_device *udev;
106
107 if (is_ohci_or_uhci(companion)) {
108 if (dev_get_drvdata(&pdev->dev)) {
109 dev_dbg(&pdev->dev, "HS companion for %s\n",
110 dev_name(&companion->dev));
111 companion_hcd->self.hs_companion = &hcd->self;
112 }
113 udev = companion_hcd->self.root_hub;
114 usb_set_configuration(udev, 1);
115 usb_unlock_device(udev);
116 }
117}
118
119
120
121
122
123static void non_ehci_add(struct pci_dev *pdev, struct usb_hcd *hcd,
124 struct pci_dev *companion, struct usb_hcd *companion_hcd)
125{
126 if (is_ohci_or_uhci(pdev) && companion->class == CL_EHCI) {
127 dev_dbg(&pdev->dev, "FS/LS companion for %s\n",
128 dev_name(&companion->dev));
129 hcd->self.hs_companion = &companion_hcd->self;
130 }
131}
132
133
134static void ehci_remove(struct pci_dev *pdev, struct usb_hcd *hcd,
135 struct pci_dev *companion, struct usb_hcd *companion_hcd)
136{
137 if (is_ohci_or_uhci(companion))
138 companion_hcd->self.hs_companion = NULL;
139}
140
141#ifdef CONFIG_PM
142
143
144static void ehci_wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd,
145 struct pci_dev *companion, struct usb_hcd *companion_hcd)
146{
147 if (is_ohci_or_uhci(companion))
148 device_pm_wait_for_dev(&pdev->dev, &companion->dev);
149}
150
151#endif
152
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172
173
174int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id,
175 const struct hc_driver *driver)
176{
177 struct usb_hcd *hcd;
178 int retval;
179 int hcd_irq = 0;
180
181 if (usb_disabled())
182 return -ENODEV;
183
184 if (!id)
185 return -EINVAL;
186
187 if (!driver)
188 return -EINVAL;
189
190 if (pci_enable_device(dev) < 0)
191 return -ENODEV;
192
193
194
195
196
197 if ((driver->flags & HCD_MASK) < HCD_USB3) {
198 retval = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_LEGACY | PCI_IRQ_MSI);
199 if (retval < 0) {
200 dev_err(&dev->dev,
201 "Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
202 pci_name(dev));
203 retval = -ENODEV;
204 goto disable_pci;
205 }
206 hcd_irq = pci_irq_vector(dev, 0);
207 }
208
209 hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
210 if (!hcd) {
211 retval = -ENOMEM;
212 goto free_irq_vectors;
213 }
214
215 hcd->amd_resume_bug = (usb_hcd_amd_remote_wakeup_quirk(dev) &&
216 driver->flags & (HCD_USB11 | HCD_USB3)) ? 1 : 0;
217
218 if (driver->flags & HCD_MEMORY) {
219
220 hcd->rsrc_start = pci_resource_start(dev, 0);
221 hcd->rsrc_len = pci_resource_len(dev, 0);
222 if (!devm_request_mem_region(&dev->dev, hcd->rsrc_start,
223 hcd->rsrc_len, driver->description)) {
224 dev_dbg(&dev->dev, "controller already in use\n");
225 retval = -EBUSY;
226 goto put_hcd;
227 }
228 hcd->regs = devm_ioremap(&dev->dev, hcd->rsrc_start,
229 hcd->rsrc_len);
230 if (hcd->regs == NULL) {
231 dev_dbg(&dev->dev, "error mapping memory\n");
232 retval = -EFAULT;
233 goto put_hcd;
234 }
235
236 } else {
237
238 int region;
239
240 for (region = 0; region < PCI_STD_NUM_BARS; region++) {
241 if (!(pci_resource_flags(dev, region) &
242 IORESOURCE_IO))
243 continue;
244
245 hcd->rsrc_start = pci_resource_start(dev, region);
246 hcd->rsrc_len = pci_resource_len(dev, region);
247 if (devm_request_region(&dev->dev, hcd->rsrc_start,
248 hcd->rsrc_len, driver->description))
249 break;
250 }
251 if (region == PCI_ROM_RESOURCE) {
252 dev_dbg(&dev->dev, "no i/o regions available\n");
253 retval = -EBUSY;
254 goto put_hcd;
255 }
256 }
257
258 pci_set_master(dev);
259
260
261 if (dev->class == CL_EHCI) {
262 down_write(&companions_rwsem);
263 dev_set_drvdata(&dev->dev, hcd);
264 for_each_companion(dev, hcd, ehci_pre_add);
265 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
266 if (retval != 0)
267 dev_set_drvdata(&dev->dev, NULL);
268 for_each_companion(dev, hcd, ehci_post_add);
269 up_write(&companions_rwsem);
270 } else {
271 down_read(&companions_rwsem);
272 dev_set_drvdata(&dev->dev, hcd);
273 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
274 if (retval != 0)
275 dev_set_drvdata(&dev->dev, NULL);
276 else
277 for_each_companion(dev, hcd, non_ehci_add);
278 up_read(&companions_rwsem);
279 }
280
281 if (retval != 0)
282 goto put_hcd;
283 device_wakeup_enable(hcd->self.controller);
284
285 if (pci_dev_run_wake(dev))
286 pm_runtime_put_noidle(&dev->dev);
287 return retval;
288
289put_hcd:
290 usb_put_hcd(hcd);
291free_irq_vectors:
292 if ((driver->flags & HCD_MASK) < HCD_USB3)
293 pci_free_irq_vectors(dev);
294disable_pci:
295 pci_disable_device(dev);
296 dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
297 return retval;
298}
299EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
300
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313
314
315
316
317void usb_hcd_pci_remove(struct pci_dev *dev)
318{
319 struct usb_hcd *hcd;
320 int hcd_driver_flags;
321
322 hcd = pci_get_drvdata(dev);
323 if (!hcd)
324 return;
325
326 hcd_driver_flags = hcd->driver->flags;
327
328 if (pci_dev_run_wake(dev))
329 pm_runtime_get_noresume(&dev->dev);
330
331
332
333
334
335 local_irq_disable();
336 usb_hcd_irq(0, hcd);
337 local_irq_enable();
338
339
340 if (dev->class == CL_EHCI) {
341 down_write(&companions_rwsem);
342 for_each_companion(dev, hcd, ehci_remove);
343 usb_remove_hcd(hcd);
344 dev_set_drvdata(&dev->dev, NULL);
345 up_write(&companions_rwsem);
346 } else {
347
348 down_read(&companions_rwsem);
349 hcd->self.hs_companion = NULL;
350 usb_remove_hcd(hcd);
351 dev_set_drvdata(&dev->dev, NULL);
352 up_read(&companions_rwsem);
353 }
354 usb_put_hcd(hcd);
355 if ((hcd_driver_flags & HCD_MASK) < HCD_USB3)
356 pci_free_irq_vectors(dev);
357 pci_disable_device(dev);
358}
359EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
360
361
362
363
364
365void usb_hcd_pci_shutdown(struct pci_dev *dev)
366{
367 struct usb_hcd *hcd;
368
369 hcd = pci_get_drvdata(dev);
370 if (!hcd)
371 return;
372
373 if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&
374 hcd->driver->shutdown) {
375 hcd->driver->shutdown(hcd);
376 if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0)
377 free_irq(hcd->irq, hcd);
378 pci_disable_device(dev);
379 }
380}
381EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
382
383#ifdef CONFIG_PM
384
385#ifdef CONFIG_PPC_PMAC
386static void powermac_set_asic(struct pci_dev *pci_dev, int enable)
387{
388
389 if (machine_is(powermac)) {
390 struct device_node *of_node;
391
392 of_node = pci_device_to_OF_node(pci_dev);
393 if (of_node)
394 pmac_call_feature(PMAC_FTR_USB_ENABLE,
395 of_node, 0, enable);
396 }
397}
398
399#else
400
401static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable)
402{}
403
404#endif
405
406static int check_root_hub_suspended(struct device *dev)
407{
408 struct usb_hcd *hcd = dev_get_drvdata(dev);
409
410 if (HCD_RH_RUNNING(hcd)) {
411 dev_warn(dev, "Root hub is not suspended\n");
412 return -EBUSY;
413 }
414 if (hcd->shared_hcd) {
415 hcd = hcd->shared_hcd;
416 if (HCD_RH_RUNNING(hcd)) {
417 dev_warn(dev, "Secondary root hub is not suspended\n");
418 return -EBUSY;
419 }
420 }
421 return 0;
422}
423
424static int suspend_common(struct device *dev, bool do_wakeup)
425{
426 struct pci_dev *pci_dev = to_pci_dev(dev);
427 struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
428 int retval;
429
430
431
432
433
434
435 retval = check_root_hub_suspended(dev);
436 if (retval)
437 return retval;
438
439 if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) {
440
441
442
443 if (do_wakeup && HCD_WAKEUP_PENDING(hcd))
444 return -EBUSY;
445 if (do_wakeup && hcd->shared_hcd &&
446 HCD_WAKEUP_PENDING(hcd->shared_hcd))
447 return -EBUSY;
448 retval = hcd->driver->pci_suspend(hcd, do_wakeup);
449 suspend_report_result(hcd->driver->pci_suspend, retval);
450
451
452 if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) ||
453 (retval == 0 && do_wakeup && hcd->shared_hcd &&
454 HCD_WAKEUP_PENDING(hcd->shared_hcd))) {
455 if (hcd->driver->pci_resume)
456 hcd->driver->pci_resume(hcd, false);
457 retval = -EBUSY;
458 }
459 if (retval)
460 return retval;
461 }
462
463
464
465
466
467 if (!hcd->msix_enabled)
468 synchronize_irq(pci_irq_vector(pci_dev, 0));
469
470
471
472
473
474
475 pci_disable_device(pci_dev);
476 return retval;
477}
478
479static int resume_common(struct device *dev, int event)
480{
481 struct pci_dev *pci_dev = to_pci_dev(dev);
482 struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
483 int retval;
484
485 if (HCD_RH_RUNNING(hcd) ||
486 (hcd->shared_hcd &&
487 HCD_RH_RUNNING(hcd->shared_hcd))) {
488 dev_dbg(dev, "can't resume, not suspended!\n");
489 return 0;
490 }
491
492 retval = pci_enable_device(pci_dev);
493 if (retval < 0) {
494 dev_err(dev, "can't re-enable after resume, %d!\n", retval);
495 return retval;
496 }
497
498 pci_set_master(pci_dev);
499
500 if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {
501
502
503
504
505
506
507 if (pci_dev->class == CL_EHCI && event != PM_EVENT_AUTO_RESUME)
508 for_each_companion(pci_dev, hcd,
509 ehci_wait_for_companions);
510
511 retval = hcd->driver->pci_resume(hcd,
512 event == PM_EVENT_RESTORE);
513 if (retval) {
514 dev_err(dev, "PCI post-resume error %d!\n", retval);
515 usb_hc_died(hcd);
516 }
517 }
518 return retval;
519}
520
521#ifdef CONFIG_PM_SLEEP
522
523static int hcd_pci_suspend(struct device *dev)
524{
525 return suspend_common(dev, device_may_wakeup(dev));
526}
527
528static int hcd_pci_suspend_noirq(struct device *dev)
529{
530 struct pci_dev *pci_dev = to_pci_dev(dev);
531 struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
532 int retval;
533
534 retval = check_root_hub_suspended(dev);
535 if (retval)
536 return retval;
537
538 pci_save_state(pci_dev);
539
540
541
542
543
544 if (HCD_DEAD(hcd))
545 device_set_wakeup_enable(dev, 0);
546 dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
547
548
549
550
551 retval = pci_prepare_to_sleep(pci_dev);
552 if (retval == -EIO) {
553 dev_dbg(dev, "--> PCI D0 legacy\n");
554 retval = 0;
555 } else if (retval == 0) {
556 dev_dbg(dev, "--> PCI %s\n",
557 pci_power_name(pci_dev->current_state));
558 } else {
559 suspend_report_result(pci_prepare_to_sleep, retval);
560 return retval;
561 }
562
563 powermac_set_asic(pci_dev, 0);
564 return retval;
565}
566
567static int hcd_pci_resume_noirq(struct device *dev)
568{
569 powermac_set_asic(to_pci_dev(dev), 1);
570 return 0;
571}
572
573static int hcd_pci_resume(struct device *dev)
574{
575 return resume_common(dev, PM_EVENT_RESUME);
576}
577
578static int hcd_pci_restore(struct device *dev)
579{
580 return resume_common(dev, PM_EVENT_RESTORE);
581}
582
583#else
584
585#define hcd_pci_suspend NULL
586#define hcd_pci_suspend_noirq NULL
587#define hcd_pci_resume_noirq NULL
588#define hcd_pci_resume NULL
589#define hcd_pci_restore NULL
590
591#endif
592
593static int hcd_pci_runtime_suspend(struct device *dev)
594{
595 int retval;
596
597 retval = suspend_common(dev, true);
598 if (retval == 0)
599 powermac_set_asic(to_pci_dev(dev), 0);
600 dev_dbg(dev, "hcd_pci_runtime_suspend: %d\n", retval);
601 return retval;
602}
603
604static int hcd_pci_runtime_resume(struct device *dev)
605{
606 int retval;
607
608 powermac_set_asic(to_pci_dev(dev), 1);
609 retval = resume_common(dev, PM_EVENT_AUTO_RESUME);
610 dev_dbg(dev, "hcd_pci_runtime_resume: %d\n", retval);
611 return retval;
612}
613
614const struct dev_pm_ops usb_hcd_pci_pm_ops = {
615 .suspend = hcd_pci_suspend,
616 .suspend_noirq = hcd_pci_suspend_noirq,
617 .resume_noirq = hcd_pci_resume_noirq,
618 .resume = hcd_pci_resume,
619 .freeze = check_root_hub_suspended,
620 .freeze_noirq = check_root_hub_suspended,
621 .thaw_noirq = NULL,
622 .thaw = NULL,
623 .poweroff = hcd_pci_suspend,
624 .poweroff_noirq = hcd_pci_suspend_noirq,
625 .restore_noirq = hcd_pci_resume_noirq,
626 .restore = hcd_pci_restore,
627 .runtime_suspend = hcd_pci_runtime_suspend,
628 .runtime_resume = hcd_pci_runtime_resume,
629};
630EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
631
632#endif
633