blob: 3799573bd385db30aab6db375bab0d506595e9c0 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * (C) Copyright David Brownell 2000-2002
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -08003 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/pci.h>
Alan Stern6d19c002010-02-12 12:21:11 +010022#include <linux/pm_runtime.h>
David Brownell21b18612005-11-23 15:45:42 -080023#include <linux/usb.h>
Eric Lescouet27729aa2010-04-24 23:21:52 +020024#include <linux/usb/hcd.h>
David Brownell21b18612005-11-23 15:45:42 -080025
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <asm/io.h>
27#include <asm/irq.h>
David Brownell21b18612005-11-23 15:45:42 -080028
29#ifdef CONFIG_PPC_PMAC
30#include <asm/machdep.h>
31#include <asm/pmac_feature.h>
32#include <asm/pci-bridge.h>
33#include <asm/prom.h>
34#endif
David Brownell5f827ea2005-09-22 22:38:16 -070035
36#include "usb.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38
David Brownellc6053ec2005-04-18 17:39:22 -070039/* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Alan Stern6d19c002010-02-12 12:21:11 +010041#ifdef CONFIG_PM_SLEEP
42
43/* Coordinate handoffs between EHCI and companion controllers
44 * during system resume
45 */
46
47static DEFINE_MUTEX(companions_mutex);
48
49#define CL_UHCI PCI_CLASS_SERIAL_USB_UHCI
50#define CL_OHCI PCI_CLASS_SERIAL_USB_OHCI
51#define CL_EHCI PCI_CLASS_SERIAL_USB_EHCI
52
53enum companion_action {
54 SET_HS_COMPANION, CLEAR_HS_COMPANION, WAIT_FOR_COMPANIONS
55};
56
57static void companion_common(struct pci_dev *pdev, struct usb_hcd *hcd,
58 enum companion_action action)
59{
60 struct pci_dev *companion;
61 struct usb_hcd *companion_hcd;
62 unsigned int slot = PCI_SLOT(pdev->devfn);
63
64 /* Iterate through other PCI functions in the same slot.
65 * If pdev is OHCI or UHCI then we are looking for EHCI, and
66 * vice versa.
67 */
68 companion = NULL;
Kulikov Vasiliy402e8dd2010-07-03 20:04:47 +040069 for_each_pci_dev(companion) {
Alan Stern6d19c002010-02-12 12:21:11 +010070 if (companion->bus != pdev->bus ||
71 PCI_SLOT(companion->devfn) != slot)
72 continue;
73
74 companion_hcd = pci_get_drvdata(companion);
75 if (!companion_hcd)
76 continue;
77
78 /* For SET_HS_COMPANION, store a pointer to the EHCI bus in
79 * the OHCI/UHCI companion bus structure.
80 * For CLEAR_HS_COMPANION, clear the pointer to the EHCI bus
81 * in the OHCI/UHCI companion bus structure.
82 * For WAIT_FOR_COMPANIONS, wait until the OHCI/UHCI
83 * companion controllers have fully resumed.
84 */
85
86 if ((pdev->class == CL_OHCI || pdev->class == CL_UHCI) &&
87 companion->class == CL_EHCI) {
88 /* action must be SET_HS_COMPANION */
89 dev_dbg(&companion->dev, "HS companion for %s\n",
90 dev_name(&pdev->dev));
91 hcd->self.hs_companion = &companion_hcd->self;
92
93 } else if (pdev->class == CL_EHCI &&
94 (companion->class == CL_OHCI ||
95 companion->class == CL_UHCI)) {
96 switch (action) {
97 case SET_HS_COMPANION:
98 dev_dbg(&pdev->dev, "HS companion for %s\n",
99 dev_name(&companion->dev));
100 companion_hcd->self.hs_companion = &hcd->self;
101 break;
102 case CLEAR_HS_COMPANION:
103 companion_hcd->self.hs_companion = NULL;
104 break;
105 case WAIT_FOR_COMPANIONS:
106 device_pm_wait_for_dev(&pdev->dev,
107 &companion->dev);
108 break;
109 }
110 }
111 }
112}
113
114static void set_hs_companion(struct pci_dev *pdev, struct usb_hcd *hcd)
115{
116 mutex_lock(&companions_mutex);
117 dev_set_drvdata(&pdev->dev, hcd);
118 companion_common(pdev, hcd, SET_HS_COMPANION);
119 mutex_unlock(&companions_mutex);
120}
121
122static void clear_hs_companion(struct pci_dev *pdev, struct usb_hcd *hcd)
123{
124 mutex_lock(&companions_mutex);
125 dev_set_drvdata(&pdev->dev, NULL);
126
127 /* If pdev is OHCI or UHCI, just clear its hs_companion pointer */
128 if (pdev->class == CL_OHCI || pdev->class == CL_UHCI)
129 hcd->self.hs_companion = NULL;
130
131 /* Otherwise search for companion buses and clear their pointers */
132 else
133 companion_common(pdev, hcd, CLEAR_HS_COMPANION);
134 mutex_unlock(&companions_mutex);
135}
136
137static void wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd)
138{
139 /* Only EHCI controllers need to wait.
140 * No locking is needed because a controller cannot be resumed
141 * while one of its companions is getting unbound.
142 */
143 if (pdev->class == CL_EHCI)
144 companion_common(pdev, hcd, WAIT_FOR_COMPANIONS);
145}
146
147#else /* !CONFIG_PM_SLEEP */
148
149static inline void set_hs_companion(struct pci_dev *d, struct usb_hcd *h) {}
150static inline void clear_hs_companion(struct pci_dev *d, struct usb_hcd *h) {}
151static inline void wait_for_companions(struct pci_dev *d, struct usb_hcd *h) {}
152
153#endif /* !CONFIG_PM_SLEEP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155/*-------------------------------------------------------------------------*/
156
157/* configure so an HC device and id are always provided */
158/* always called with process context; sleeping is OK */
159
160/**
161 * usb_hcd_pci_probe - initialize PCI-based HCDs
162 * @dev: USB Host Controller being probed
163 * @id: pci hotplug id connecting controller to HCD framework
164 * Context: !in_interrupt()
165 *
166 * Allocates basic PCI resources for this USB host controller, and
167 * then invokes the start() method for the HCD associated with it
168 * through the hotplug entry's driver_data.
169 *
170 * Store this function in the HCD's struct pci_driver as probe().
171 */
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800172int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173{
174 struct hc_driver *driver;
175 struct usb_hcd *hcd;
176 int retval;
177
178 if (usb_disabled())
179 return -ENODEV;
180
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800181 if (!id)
182 return -EINVAL;
183 driver = (struct hc_driver *)id->driver_data;
184 if (!driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 return -EINVAL;
186
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800187 if (pci_enable_device(dev) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 return -ENODEV;
David Brownellc6053ec2005-04-18 17:39:22 -0700189 dev->current_state = PCI_D0;
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800190
191 if (!dev->irq) {
192 dev_err(&dev->dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 "Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
194 pci_name(dev));
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800195 retval = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 goto err1;
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800197 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800199 hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 if (!hcd) {
201 retval = -ENOMEM;
202 goto err1;
203 }
204
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800205 if (driver->flags & HCD_MEMORY) {
206 /* EHCI, OHCI */
207 hcd->rsrc_start = pci_resource_start(dev, 0);
208 hcd->rsrc_len = pci_resource_len(dev, 0);
209 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 driver->description)) {
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800211 dev_dbg(&dev->dev, "controller already in use\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 retval = -EBUSY;
213 goto err2;
214 }
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800215 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 if (hcd->regs == NULL) {
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800217 dev_dbg(&dev->dev, "error mapping memory\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 retval = -EFAULT;
219 goto err3;
220 }
221
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800222 } else {
223 /* UHCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 int region;
225
226 for (region = 0; region < PCI_ROM_RESOURCE; region++) {
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800227 if (!(pci_resource_flags(dev, region) &
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 IORESOURCE_IO))
229 continue;
230
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800231 hcd->rsrc_start = pci_resource_start(dev, region);
232 hcd->rsrc_len = pci_resource_len(dev, region);
233 if (request_region(hcd->rsrc_start, hcd->rsrc_len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 driver->description))
235 break;
236 }
237 if (region == PCI_ROM_RESOURCE) {
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800238 dev_dbg(&dev->dev, "no i/o regions available\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 retval = -EBUSY;
Alan Stern6d19c002010-02-12 12:21:11 +0100240 goto err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 }
242 }
243
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800244 pci_set_master(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Alan Stern442258e2007-12-06 14:47:08 -0500246 retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 if (retval != 0)
248 goto err4;
Alan Stern6d19c002010-02-12 12:21:11 +0100249 set_hs_companion(dev, hcd);
Alan Stern3da7cff2010-06-25 14:02:57 -0400250
251 if (pci_dev_run_wake(dev))
252 pm_runtime_put_noidle(&dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 return retval;
254
255 err4:
256 if (driver->flags & HCD_MEMORY) {
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800257 iounmap(hcd->regs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 err3:
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800259 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 } else
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800261 release_region(hcd->rsrc_start, hcd->rsrc_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 err2:
Alan Stern6d19c002010-02-12 12:21:11 +0100263 clear_hs_companion(dev, hcd);
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800264 usb_put_hcd(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 err1:
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800266 pci_disable_device(dev);
267 dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 return retval;
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800269}
Greg Kroah-Hartman782e70c2008-01-25 11:12:21 -0600270EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
272
273/* may be called without controller electrically present */
274/* may be called with controller, bus, and devices active */
275
276/**
277 * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
278 * @dev: USB Host Controller being removed
279 * Context: !in_interrupt()
280 *
281 * Reverses the effect of usb_hcd_pci_probe(), first invoking
282 * the HCD's stop() method. It is always called from a thread
283 * context, normally "rmmod", "apmd", or something similar.
284 *
285 * Store this function in the HCD's struct pci_driver as remove().
286 */
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800287void usb_hcd_pci_remove(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288{
289 struct usb_hcd *hcd;
290
291 hcd = pci_get_drvdata(dev);
292 if (!hcd)
293 return;
294
Alan Stern3da7cff2010-06-25 14:02:57 -0400295 if (pci_dev_run_wake(dev))
296 pm_runtime_get_noresume(&dev->dev);
297
Alan Sternc5487952010-06-09 17:34:27 -0400298 /* Fake an interrupt request in order to give the driver a chance
299 * to test whether the controller hardware has been removed (e.g.,
300 * cardbus physical eject).
301 */
302 local_irq_disable();
303 usb_hcd_irq(0, hcd);
304 local_irq_enable();
305
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800306 usb_remove_hcd(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 if (hcd->driver->flags & HCD_MEMORY) {
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800308 iounmap(hcd->regs);
309 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 } else {
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800311 release_region(hcd->rsrc_start, hcd->rsrc_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 }
Alan Stern6d19c002010-02-12 12:21:11 +0100313 clear_hs_companion(dev, hcd);
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800314 usb_put_hcd(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 pci_disable_device(dev);
316}
Greg Kroah-Hartman782e70c2008-01-25 11:12:21 -0600317EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700319/**
320 * usb_hcd_pci_shutdown - shutdown host controller
321 * @dev: USB Host Controller being shutdown
322 */
Greg Kroah-Hartman34bbe4c2008-01-30 15:21:33 -0800323void usb_hcd_pci_shutdown(struct pci_dev *dev)
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700324{
325 struct usb_hcd *hcd;
326
327 hcd = pci_get_drvdata(dev);
328 if (!hcd)
329 return;
330
Alan Stern3da7cff2010-06-25 14:02:57 -0400331 if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&
Alan Stern3df71692010-09-10 16:37:05 -0400332 hcd->driver->shutdown) {
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700333 hcd->driver->shutdown(hcd);
Alan Stern3df71692010-09-10 16:37:05 -0400334 pci_disable_device(dev);
335 }
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700336}
Greg Kroah-Hartman782e70c2008-01-25 11:12:21 -0600337EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
Alan Stern3da7cff2010-06-25 14:02:57 -0400339#ifdef CONFIG_PM_OPS
Alan Sternabb30642009-04-27 13:33:24 -0400340
Alan Stern2138a1f2010-06-25 14:01:49 -0400341#ifdef CONFIG_PPC_PMAC
342static void powermac_set_asic(struct pci_dev *pci_dev, int enable)
343{
344 /* Enanble or disable ASIC clocks for USB */
345 if (machine_is(powermac)) {
346 struct device_node *of_node;
347
348 of_node = pci_device_to_OF_node(pci_dev);
349 if (of_node)
350 pmac_call_feature(PMAC_FTR_USB_ENABLE,
351 of_node, 0, enable);
352 }
353}
354
355#else
356
357static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable)
358{}
359
360#endif /* CONFIG_PPC_PMAC */
361
Alan Sternabb30642009-04-27 13:33:24 -0400362static int check_root_hub_suspended(struct device *dev)
363{
364 struct pci_dev *pci_dev = to_pci_dev(dev);
365 struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
366
367 if (!(hcd->state == HC_STATE_SUSPENDED ||
368 hcd->state == HC_STATE_HALT)) {
369 dev_warn(dev, "Root hub is not suspended\n");
370 return -EBUSY;
371 }
372 return 0;
373}
374
Alan Stern3da7cff2010-06-25 14:02:57 -0400375static int suspend_common(struct device *dev, bool do_wakeup)
Alan Sternabb30642009-04-27 13:33:24 -0400376{
377 struct pci_dev *pci_dev = to_pci_dev(dev);
378 struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
379 int retval;
380
381 /* Root hub suspend should have stopped all downstream traffic,
382 * and all bus master traffic. And done so for both the interface
383 * and the stub usb_device (which we check here). But maybe it
384 * didn't; writing sysfs power/state files ignores such rules...
385 */
386 retval = check_root_hub_suspended(dev);
387 if (retval)
388 return retval;
389
Alan Sternabb30642009-04-27 13:33:24 -0400390 if (hcd->driver->pci_suspend) {
Alan Sternff2f0782010-06-25 14:02:35 -0400391 /* Optimization: Don't suspend if a root-hub wakeup is
392 * pending and it would cause the HCD to wake up anyway.
393 */
394 if (do_wakeup && HCD_WAKEUP_PENDING(hcd))
395 return -EBUSY;
Alan Stern41472002010-06-25 14:02:14 -0400396 retval = hcd->driver->pci_suspend(hcd, do_wakeup);
Alan Sternabb30642009-04-27 13:33:24 -0400397 suspend_report_result(hcd->driver->pci_suspend, retval);
Alan Sternff2f0782010-06-25 14:02:35 -0400398
399 /* Check again in case wakeup raced with pci_suspend */
400 if (retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
401 if (hcd->driver->pci_resume)
402 hcd->driver->pci_resume(hcd, false);
403 retval = -EBUSY;
404 }
Alan Sternabb30642009-04-27 13:33:24 -0400405 if (retval)
406 return retval;
407 }
408
409 synchronize_irq(pci_dev->irq);
410
411 /* Downstream ports from this root hub should already be quiesced, so
412 * there will be no DMA activity. Now we can shut down the upstream
413 * link (except maybe for PME# resume signaling). We'll enter a
414 * low power state during suspend_noirq, if the hardware allows.
415 */
416 pci_disable_device(pci_dev);
417 return retval;
418}
419
Alan Stern057c58b2010-06-25 14:02:03 -0400420static int resume_common(struct device *dev, int event)
421{
422 struct pci_dev *pci_dev = to_pci_dev(dev);
423 struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
424 int retval;
425
426 if (hcd->state != HC_STATE_SUSPENDED) {
427 dev_dbg(dev, "can't resume, not suspended!\n");
428 return 0;
429 }
430
431 retval = pci_enable_device(pci_dev);
432 if (retval < 0) {
433 dev_err(dev, "can't re-enable after resume, %d!\n", retval);
434 return retval;
435 }
436
437 pci_set_master(pci_dev);
438
439 clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
440
441 if (hcd->driver->pci_resume) {
Alan Stern3da7cff2010-06-25 14:02:57 -0400442 if (event != PM_EVENT_AUTO_RESUME)
443 wait_for_companions(pci_dev, hcd);
Alan Stern057c58b2010-06-25 14:02:03 -0400444
445 retval = hcd->driver->pci_resume(hcd,
446 event == PM_EVENT_RESTORE);
447 if (retval) {
448 dev_err(dev, "PCI post-resume error %d!\n", retval);
449 usb_hc_died(hcd);
450 }
451 }
452 return retval;
453}
454
Alan Stern3da7cff2010-06-25 14:02:57 -0400455#ifdef CONFIG_PM_SLEEP
456
457static int hcd_pci_suspend(struct device *dev)
458{
459 return suspend_common(dev, device_may_wakeup(dev));
460}
461
Alan Sternabb30642009-04-27 13:33:24 -0400462static int hcd_pci_suspend_noirq(struct device *dev)
463{
464 struct pci_dev *pci_dev = to_pci_dev(dev);
465 struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
466 int retval;
467
468 retval = check_root_hub_suspended(dev);
469 if (retval)
470 return retval;
471
472 pci_save_state(pci_dev);
473
474 /* If the root hub is HALTed rather than SUSPENDed,
475 * disallow remote wakeup.
476 */
477 if (hcd->state == HC_STATE_HALT)
478 device_set_wakeup_enable(dev, 0);
479 dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
480
481 /* Possibly enable remote wakeup,
482 * choose the appropriate low-power state, and go to that state.
483 */
484 retval = pci_prepare_to_sleep(pci_dev);
485 if (retval == -EIO) { /* Low-power not supported */
486 dev_dbg(dev, "--> PCI D0 legacy\n");
487 retval = 0;
488 } else if (retval == 0) {
489 dev_dbg(dev, "--> PCI %s\n",
490 pci_power_name(pci_dev->current_state));
491 } else {
492 suspend_report_result(pci_prepare_to_sleep, retval);
493 return retval;
494 }
495
Alan Stern2138a1f2010-06-25 14:01:49 -0400496 powermac_set_asic(pci_dev, 0);
Alan Sternabb30642009-04-27 13:33:24 -0400497 return retval;
498}
499
500static int hcd_pci_resume_noirq(struct device *dev)
501{
502 struct pci_dev *pci_dev = to_pci_dev(dev);
503
Alan Stern2138a1f2010-06-25 14:01:49 -0400504 powermac_set_asic(pci_dev, 1);
Alan Sternabb30642009-04-27 13:33:24 -0400505
506 /* Go back to D0 and disable remote wakeup */
507 pci_back_from_sleep(pci_dev);
508 return 0;
509}
510
Alan Sternabb30642009-04-27 13:33:24 -0400511static int hcd_pci_resume(struct device *dev)
512{
Alan Stern057c58b2010-06-25 14:02:03 -0400513 return resume_common(dev, PM_EVENT_RESUME);
Alan Sternabb30642009-04-27 13:33:24 -0400514}
515
516static int hcd_pci_restore(struct device *dev)
517{
Alan Stern057c58b2010-06-25 14:02:03 -0400518 return resume_common(dev, PM_EVENT_RESTORE);
Alan Sternabb30642009-04-27 13:33:24 -0400519}
520
Alan Stern3da7cff2010-06-25 14:02:57 -0400521#else
522
523#define hcd_pci_suspend NULL
524#define hcd_pci_suspend_noirq NULL
525#define hcd_pci_resume_noirq NULL
526#define hcd_pci_resume NULL
527#define hcd_pci_restore NULL
528
529#endif /* CONFIG_PM_SLEEP */
530
531#ifdef CONFIG_PM_RUNTIME
532
533static int hcd_pci_runtime_suspend(struct device *dev)
534{
535 int retval;
536
537 retval = suspend_common(dev, true);
538 if (retval == 0)
539 powermac_set_asic(to_pci_dev(dev), 0);
540 dev_dbg(dev, "hcd_pci_runtime_suspend: %d\n", retval);
541 return retval;
542}
543
544static int hcd_pci_runtime_resume(struct device *dev)
545{
546 int retval;
547
548 powermac_set_asic(to_pci_dev(dev), 1);
549 retval = resume_common(dev, PM_EVENT_AUTO_RESUME);
550 dev_dbg(dev, "hcd_pci_runtime_resume: %d\n", retval);
551 return retval;
552}
553
554#else
555
556#define hcd_pci_runtime_suspend NULL
557#define hcd_pci_runtime_resume NULL
558
559#endif /* CONFIG_PM_RUNTIME */
560
Alexey Dobriyan47145212009-12-14 18:00:08 -0800561const struct dev_pm_ops usb_hcd_pci_pm_ops = {
Alan Sternabb30642009-04-27 13:33:24 -0400562 .suspend = hcd_pci_suspend,
563 .suspend_noirq = hcd_pci_suspend_noirq,
564 .resume_noirq = hcd_pci_resume_noirq,
565 .resume = hcd_pci_resume,
566 .freeze = check_root_hub_suspended,
567 .freeze_noirq = check_root_hub_suspended,
568 .thaw_noirq = NULL,
569 .thaw = NULL,
570 .poweroff = hcd_pci_suspend,
571 .poweroff_noirq = hcd_pci_suspend_noirq,
572 .restore_noirq = hcd_pci_resume_noirq,
573 .restore = hcd_pci_restore,
Alan Stern3da7cff2010-06-25 14:02:57 -0400574 .runtime_suspend = hcd_pci_runtime_suspend,
575 .runtime_resume = hcd_pci_runtime_resume,
Alan Sternabb30642009-04-27 13:33:24 -0400576};
577EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
578
Alan Stern3da7cff2010-06-25 14:02:57 -0400579#endif /* CONFIG_PM_OPS */