Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * (C) Copyright David Brownell 2000-2002 | |
34bbe4c1 | 3 | * |
1da177e4 LT |
4 | * 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 | ||
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/pci.h> | |
21b1861f | 22 | #include <linux/usb.h> |
27729aad | 23 | #include <linux/usb/hcd.h> |
21b1861f | 24 | |
1da177e4 LT |
25 | #include <asm/io.h> |
26 | #include <asm/irq.h> | |
21b1861f DB |
27 | |
28 | #ifdef CONFIG_PPC_PMAC | |
29 | #include <asm/machdep.h> | |
30 | #include <asm/pmac_feature.h> | |
31 | #include <asm/pci-bridge.h> | |
32 | #include <asm/prom.h> | |
33 | #endif | |
5f827ea3 DB |
34 | |
35 | #include "usb.h" | |
1da177e4 LT |
36 | |
37 | ||
c6053ecf | 38 | /* PCI-based HCs are common, but plenty of non-PCI HCs are used too */ |
1da177e4 | 39 | |
6d19c009 AS |
40 | #ifdef CONFIG_PM_SLEEP |
41 | ||
42 | /* Coordinate handoffs between EHCI and companion controllers | |
43 | * during system resume | |
44 | */ | |
45 | ||
46 | static DEFINE_MUTEX(companions_mutex); | |
47 | ||
48 | #define CL_UHCI PCI_CLASS_SERIAL_USB_UHCI | |
49 | #define CL_OHCI PCI_CLASS_SERIAL_USB_OHCI | |
50 | #define CL_EHCI PCI_CLASS_SERIAL_USB_EHCI | |
51 | ||
52 | enum companion_action { | |
53 | SET_HS_COMPANION, CLEAR_HS_COMPANION, WAIT_FOR_COMPANIONS | |
54 | }; | |
55 | ||
56 | static void companion_common(struct pci_dev *pdev, struct usb_hcd *hcd, | |
57 | enum companion_action action) | |
58 | { | |
59 | struct pci_dev *companion; | |
60 | struct usb_hcd *companion_hcd; | |
61 | unsigned int slot = PCI_SLOT(pdev->devfn); | |
62 | ||
63 | /* Iterate through other PCI functions in the same slot. | |
64 | * If pdev is OHCI or UHCI then we are looking for EHCI, and | |
65 | * vice versa. | |
66 | */ | |
67 | companion = NULL; | |
402e8dd6 | 68 | for_each_pci_dev(companion) { |
6d19c009 AS |
69 | if (companion->bus != pdev->bus || |
70 | PCI_SLOT(companion->devfn) != slot) | |
71 | continue; | |
72 | ||
73 | companion_hcd = pci_get_drvdata(companion); | |
74 | if (!companion_hcd) | |
75 | continue; | |
76 | ||
77 | /* For SET_HS_COMPANION, store a pointer to the EHCI bus in | |
78 | * the OHCI/UHCI companion bus structure. | |
79 | * For CLEAR_HS_COMPANION, clear the pointer to the EHCI bus | |
80 | * in the OHCI/UHCI companion bus structure. | |
81 | * For WAIT_FOR_COMPANIONS, wait until the OHCI/UHCI | |
82 | * companion controllers have fully resumed. | |
83 | */ | |
84 | ||
85 | if ((pdev->class == CL_OHCI || pdev->class == CL_UHCI) && | |
86 | companion->class == CL_EHCI) { | |
87 | /* action must be SET_HS_COMPANION */ | |
88 | dev_dbg(&companion->dev, "HS companion for %s\n", | |
89 | dev_name(&pdev->dev)); | |
90 | hcd->self.hs_companion = &companion_hcd->self; | |
91 | ||
92 | } else if (pdev->class == CL_EHCI && | |
93 | (companion->class == CL_OHCI || | |
94 | companion->class == CL_UHCI)) { | |
95 | switch (action) { | |
96 | case SET_HS_COMPANION: | |
97 | dev_dbg(&pdev->dev, "HS companion for %s\n", | |
98 | dev_name(&companion->dev)); | |
99 | companion_hcd->self.hs_companion = &hcd->self; | |
100 | break; | |
101 | case CLEAR_HS_COMPANION: | |
102 | companion_hcd->self.hs_companion = NULL; | |
103 | break; | |
104 | case WAIT_FOR_COMPANIONS: | |
105 | device_pm_wait_for_dev(&pdev->dev, | |
106 | &companion->dev); | |
107 | break; | |
108 | } | |
109 | } | |
110 | } | |
111 | } | |
112 | ||
113 | static void set_hs_companion(struct pci_dev *pdev, struct usb_hcd *hcd) | |
114 | { | |
115 | mutex_lock(&companions_mutex); | |
116 | dev_set_drvdata(&pdev->dev, hcd); | |
117 | companion_common(pdev, hcd, SET_HS_COMPANION); | |
118 | mutex_unlock(&companions_mutex); | |
119 | } | |
120 | ||
121 | static void clear_hs_companion(struct pci_dev *pdev, struct usb_hcd *hcd) | |
122 | { | |
123 | mutex_lock(&companions_mutex); | |
124 | dev_set_drvdata(&pdev->dev, NULL); | |
125 | ||
126 | /* If pdev is OHCI or UHCI, just clear its hs_companion pointer */ | |
127 | if (pdev->class == CL_OHCI || pdev->class == CL_UHCI) | |
128 | hcd->self.hs_companion = NULL; | |
129 | ||
130 | /* Otherwise search for companion buses and clear their pointers */ | |
131 | else | |
132 | companion_common(pdev, hcd, CLEAR_HS_COMPANION); | |
133 | mutex_unlock(&companions_mutex); | |
134 | } | |
135 | ||
136 | static void wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd) | |
137 | { | |
138 | /* Only EHCI controllers need to wait. | |
139 | * No locking is needed because a controller cannot be resumed | |
140 | * while one of its companions is getting unbound. | |
141 | */ | |
142 | if (pdev->class == CL_EHCI) | |
143 | companion_common(pdev, hcd, WAIT_FOR_COMPANIONS); | |
144 | } | |
145 | ||
146 | #else /* !CONFIG_PM_SLEEP */ | |
147 | ||
148 | static inline void set_hs_companion(struct pci_dev *d, struct usb_hcd *h) {} | |
149 | static inline void clear_hs_companion(struct pci_dev *d, struct usb_hcd *h) {} | |
150 | static inline void wait_for_companions(struct pci_dev *d, struct usb_hcd *h) {} | |
151 | ||
152 | #endif /* !CONFIG_PM_SLEEP */ | |
1da177e4 LT |
153 | |
154 | /*-------------------------------------------------------------------------*/ | |
155 | ||
156 | /* configure so an HC device and id are always provided */ | |
157 | /* always called with process context; sleeping is OK */ | |
158 | ||
159 | /** | |
160 | * usb_hcd_pci_probe - initialize PCI-based HCDs | |
161 | * @dev: USB Host Controller being probed | |
162 | * @id: pci hotplug id connecting controller to HCD framework | |
163 | * Context: !in_interrupt() | |
164 | * | |
165 | * Allocates basic PCI resources for this USB host controller, and | |
166 | * then invokes the start() method for the HCD associated with it | |
167 | * through the hotplug entry's driver_data. | |
168 | * | |
169 | * Store this function in the HCD's struct pci_driver as probe(). | |
170 | */ | |
34bbe4c1 | 171 | int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4 LT |
172 | { |
173 | struct hc_driver *driver; | |
174 | struct usb_hcd *hcd; | |
175 | int retval; | |
176 | ||
177 | if (usb_disabled()) | |
178 | return -ENODEV; | |
179 | ||
34bbe4c1 GKH |
180 | if (!id) |
181 | return -EINVAL; | |
182 | driver = (struct hc_driver *)id->driver_data; | |
183 | if (!driver) | |
1da177e4 LT |
184 | return -EINVAL; |
185 | ||
34bbe4c1 | 186 | if (pci_enable_device(dev) < 0) |
1da177e4 | 187 | return -ENODEV; |
c6053ecf | 188 | dev->current_state = PCI_D0; |
34bbe4c1 | 189 | |
68d07f64 SS |
190 | /* The xHCI driver supports MSI and MSI-X, |
191 | * so don't fail if the BIOS doesn't provide a legacy IRQ. | |
192 | */ | |
193 | if (!dev->irq && (driver->flags & HCD_MASK) != HCD_USB3) { | |
34bbe4c1 | 194 | dev_err(&dev->dev, |
1da177e4 LT |
195 | "Found HC with no IRQ. Check BIOS/PCI %s setup!\n", |
196 | pci_name(dev)); | |
34bbe4c1 | 197 | retval = -ENODEV; |
8766c815 | 198 | goto disable_pci; |
34bbe4c1 | 199 | } |
1da177e4 | 200 | |
34bbe4c1 | 201 | hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev)); |
1da177e4 LT |
202 | if (!hcd) { |
203 | retval = -ENOMEM; | |
8766c815 | 204 | goto disable_pci; |
1da177e4 LT |
205 | } |
206 | ||
34bbe4c1 GKH |
207 | if (driver->flags & HCD_MEMORY) { |
208 | /* EHCI, OHCI */ | |
209 | hcd->rsrc_start = pci_resource_start(dev, 0); | |
210 | hcd->rsrc_len = pci_resource_len(dev, 0); | |
211 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, | |
1da177e4 | 212 | driver->description)) { |
34bbe4c1 | 213 | dev_dbg(&dev->dev, "controller already in use\n"); |
1da177e4 | 214 | retval = -EBUSY; |
8766c815 | 215 | goto clear_companion; |
1da177e4 | 216 | } |
34bbe4c1 | 217 | hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 218 | if (hcd->regs == NULL) { |
34bbe4c1 | 219 | dev_dbg(&dev->dev, "error mapping memory\n"); |
1da177e4 | 220 | retval = -EFAULT; |
8766c815 | 221 | goto release_mem_region; |
1da177e4 LT |
222 | } |
223 | ||
34bbe4c1 GKH |
224 | } else { |
225 | /* UHCI */ | |
1da177e4 LT |
226 | int region; |
227 | ||
228 | for (region = 0; region < PCI_ROM_RESOURCE; region++) { | |
34bbe4c1 | 229 | if (!(pci_resource_flags(dev, region) & |
1da177e4 LT |
230 | IORESOURCE_IO)) |
231 | continue; | |
232 | ||
34bbe4c1 GKH |
233 | hcd->rsrc_start = pci_resource_start(dev, region); |
234 | hcd->rsrc_len = pci_resource_len(dev, region); | |
235 | if (request_region(hcd->rsrc_start, hcd->rsrc_len, | |
1da177e4 LT |
236 | driver->description)) |
237 | break; | |
238 | } | |
239 | if (region == PCI_ROM_RESOURCE) { | |
34bbe4c1 | 240 | dev_dbg(&dev->dev, "no i/o regions available\n"); |
1da177e4 | 241 | retval = -EBUSY; |
8766c815 | 242 | goto clear_companion; |
1da177e4 LT |
243 | } |
244 | } | |
245 | ||
34bbe4c1 | 246 | pci_set_master(dev); |
1da177e4 | 247 | |
b5dd18d8 | 248 | retval = usb_add_hcd(hcd, dev->irq, IRQF_SHARED); |
1da177e4 | 249 | if (retval != 0) |
8766c815 | 250 | goto unmap_registers; |
6d19c009 | 251 | set_hs_companion(dev, hcd); |
3da7cff4 AS |
252 | |
253 | if (pci_dev_run_wake(dev)) | |
254 | pm_runtime_put_noidle(&dev->dev); | |
1da177e4 LT |
255 | return retval; |
256 | ||
8766c815 | 257 | unmap_registers: |
1da177e4 | 258 | if (driver->flags & HCD_MEMORY) { |
34bbe4c1 | 259 | iounmap(hcd->regs); |
8766c815 | 260 | release_mem_region: |
34bbe4c1 | 261 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 262 | } else |
34bbe4c1 | 263 | release_region(hcd->rsrc_start, hcd->rsrc_len); |
8766c815 | 264 | clear_companion: |
6d19c009 | 265 | clear_hs_companion(dev, hcd); |
34bbe4c1 | 266 | usb_put_hcd(hcd); |
8766c815 | 267 | disable_pci: |
34bbe4c1 GKH |
268 | pci_disable_device(dev); |
269 | dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval); | |
1da177e4 | 270 | return retval; |
34bbe4c1 | 271 | } |
782e70c6 | 272 | EXPORT_SYMBOL_GPL(usb_hcd_pci_probe); |
1da177e4 LT |
273 | |
274 | ||
275 | /* may be called without controller electrically present */ | |
276 | /* may be called with controller, bus, and devices active */ | |
277 | ||
278 | /** | |
279 | * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs | |
280 | * @dev: USB Host Controller being removed | |
281 | * Context: !in_interrupt() | |
282 | * | |
283 | * Reverses the effect of usb_hcd_pci_probe(), first invoking | |
284 | * the HCD's stop() method. It is always called from a thread | |
285 | * context, normally "rmmod", "apmd", or something similar. | |
286 | * | |
287 | * Store this function in the HCD's struct pci_driver as remove(). | |
288 | */ | |
34bbe4c1 | 289 | void usb_hcd_pci_remove(struct pci_dev *dev) |
1da177e4 LT |
290 | { |
291 | struct usb_hcd *hcd; | |
292 | ||
293 | hcd = pci_get_drvdata(dev); | |
294 | if (!hcd) | |
295 | return; | |
296 | ||
3da7cff4 AS |
297 | if (pci_dev_run_wake(dev)) |
298 | pm_runtime_get_noresume(&dev->dev); | |
299 | ||
c548795a AS |
300 | /* Fake an interrupt request in order to give the driver a chance |
301 | * to test whether the controller hardware has been removed (e.g., | |
302 | * cardbus physical eject). | |
303 | */ | |
304 | local_irq_disable(); | |
305 | usb_hcd_irq(0, hcd); | |
306 | local_irq_enable(); | |
307 | ||
34bbe4c1 | 308 | usb_remove_hcd(hcd); |
1da177e4 | 309 | if (hcd->driver->flags & HCD_MEMORY) { |
34bbe4c1 GKH |
310 | iounmap(hcd->regs); |
311 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
1da177e4 | 312 | } else { |
34bbe4c1 | 313 | release_region(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 314 | } |
6d19c009 | 315 | clear_hs_companion(dev, hcd); |
34bbe4c1 | 316 | usb_put_hcd(hcd); |
1da177e4 LT |
317 | pci_disable_device(dev); |
318 | } | |
782e70c6 | 319 | EXPORT_SYMBOL_GPL(usb_hcd_pci_remove); |
1da177e4 | 320 | |
1da177e4 | 321 | /** |
abb30641 AS |
322 | * usb_hcd_pci_shutdown - shutdown host controller |
323 | * @dev: USB Host Controller being shutdown | |
1da177e4 | 324 | */ |
abb30641 AS |
325 | void usb_hcd_pci_shutdown(struct pci_dev *dev) |
326 | { | |
327 | struct usb_hcd *hcd; | |
328 | ||
329 | hcd = pci_get_drvdata(dev); | |
330 | if (!hcd) | |
331 | return; | |
332 | ||
3da7cff4 | 333 | if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) && |
3df7169e | 334 | hcd->driver->shutdown) { |
abb30641 | 335 | hcd->driver->shutdown(hcd); |
3df7169e AS |
336 | pci_disable_device(dev); |
337 | } | |
abb30641 AS |
338 | } |
339 | EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown); | |
340 | ||
aa338601 | 341 | #ifdef CONFIG_PM |
abb30641 | 342 | |
2138a1f1 AS |
343 | #ifdef CONFIG_PPC_PMAC |
344 | static void powermac_set_asic(struct pci_dev *pci_dev, int enable) | |
345 | { | |
346 | /* Enanble or disable ASIC clocks for USB */ | |
347 | if (machine_is(powermac)) { | |
348 | struct device_node *of_node; | |
349 | ||
350 | of_node = pci_device_to_OF_node(pci_dev); | |
351 | if (of_node) | |
352 | pmac_call_feature(PMAC_FTR_USB_ENABLE, | |
353 | of_node, 0, enable); | |
354 | } | |
355 | } | |
356 | ||
357 | #else | |
358 | ||
359 | static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable) | |
360 | {} | |
361 | ||
362 | #endif /* CONFIG_PPC_PMAC */ | |
363 | ||
abb30641 AS |
364 | static int check_root_hub_suspended(struct device *dev) |
365 | { | |
366 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
367 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
368 | ||
9b37596a | 369 | if (HCD_RH_RUNNING(hcd)) { |
abb30641 AS |
370 | dev_warn(dev, "Root hub is not suspended\n"); |
371 | return -EBUSY; | |
372 | } | |
ff9d78b3 SS |
373 | if (hcd->shared_hcd) { |
374 | hcd = hcd->shared_hcd; | |
375 | if (HCD_RH_RUNNING(hcd)) { | |
376 | dev_warn(dev, "Secondary root hub is not suspended\n"); | |
377 | return -EBUSY; | |
378 | } | |
379 | } | |
abb30641 AS |
380 | return 0; |
381 | } | |
382 | ||
87364624 | 383 | #if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM_RUNTIME) |
3da7cff4 | 384 | static int suspend_common(struct device *dev, bool do_wakeup) |
1da177e4 | 385 | { |
abb30641 AS |
386 | struct pci_dev *pci_dev = to_pci_dev(dev); |
387 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
388 | int retval; | |
1da177e4 | 389 | |
5f827ea3 DB |
390 | /* Root hub suspend should have stopped all downstream traffic, |
391 | * and all bus master traffic. And done so for both the interface | |
392 | * and the stub usb_device (which we check here). But maybe it | |
393 | * didn't; writing sysfs power/state files ignores such rules... | |
5f827ea3 | 394 | */ |
abb30641 AS |
395 | retval = check_root_hub_suspended(dev); |
396 | if (retval) | |
397 | return retval; | |
a0d4922d | 398 | |
9b37596a | 399 | if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) { |
ff2f0787 AS |
400 | /* Optimization: Don't suspend if a root-hub wakeup is |
401 | * pending and it would cause the HCD to wake up anyway. | |
402 | */ | |
403 | if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) | |
404 | return -EBUSY; | |
ff9d78b3 SS |
405 | if (do_wakeup && hcd->shared_hcd && |
406 | HCD_WAKEUP_PENDING(hcd->shared_hcd)) | |
407 | return -EBUSY; | |
4147200d | 408 | retval = hcd->driver->pci_suspend(hcd, do_wakeup); |
7be7d741 | 409 | suspend_report_result(hcd->driver->pci_suspend, retval); |
ff2f0787 AS |
410 | |
411 | /* Check again in case wakeup raced with pci_suspend */ | |
ff9d78b3 SS |
412 | if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) || |
413 | (retval == 0 && do_wakeup && hcd->shared_hcd && | |
414 | HCD_WAKEUP_PENDING(hcd->shared_hcd))) { | |
ff2f0787 AS |
415 | if (hcd->driver->pci_resume) |
416 | hcd->driver->pci_resume(hcd, false); | |
417 | retval = -EBUSY; | |
418 | } | |
02669492 | 419 | if (retval) |
abb30641 | 420 | return retval; |
5f827ea3 DB |
421 | } |
422 | ||
0029227f AX |
423 | /* If MSI-X is enabled, the driver will have synchronized all vectors |
424 | * in pci_suspend(). If MSI or legacy PCI is enabled, that will be | |
425 | * synchronized here. | |
426 | */ | |
427 | if (!hcd->msix_enabled) | |
428 | synchronize_irq(pci_dev->irq); | |
c6053ecf | 429 | |
a15d95a0 RW |
430 | /* Downstream ports from this root hub should already be quiesced, so |
431 | * there will be no DMA activity. Now we can shut down the upstream | |
abb30641 AS |
432 | * link (except maybe for PME# resume signaling). We'll enter a |
433 | * low power state during suspend_noirq, if the hardware allows. | |
a15d95a0 | 434 | */ |
abb30641 AS |
435 | pci_disable_device(pci_dev); |
436 | return retval; | |
437 | } | |
438 | ||
057c58bf AS |
439 | static int resume_common(struct device *dev, int event) |
440 | { | |
441 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
442 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
443 | int retval; | |
444 | ||
ff9d78b3 SS |
445 | if (HCD_RH_RUNNING(hcd) || |
446 | (hcd->shared_hcd && | |
447 | HCD_RH_RUNNING(hcd->shared_hcd))) { | |
057c58bf AS |
448 | dev_dbg(dev, "can't resume, not suspended!\n"); |
449 | return 0; | |
450 | } | |
451 | ||
452 | retval = pci_enable_device(pci_dev); | |
453 | if (retval < 0) { | |
454 | dev_err(dev, "can't re-enable after resume, %d!\n", retval); | |
455 | return retval; | |
456 | } | |
457 | ||
458 | pci_set_master(pci_dev); | |
459 | ||
9b37596a | 460 | if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) { |
3da7cff4 AS |
461 | if (event != PM_EVENT_AUTO_RESUME) |
462 | wait_for_companions(pci_dev, hcd); | |
057c58bf AS |
463 | |
464 | retval = hcd->driver->pci_resume(hcd, | |
465 | event == PM_EVENT_RESTORE); | |
466 | if (retval) { | |
467 | dev_err(dev, "PCI post-resume error %d!\n", retval); | |
ff9d78b3 SS |
468 | if (hcd->shared_hcd) |
469 | usb_hc_died(hcd->shared_hcd); | |
057c58bf AS |
470 | usb_hc_died(hcd); |
471 | } | |
472 | } | |
473 | return retval; | |
474 | } | |
87364624 | 475 | #endif /* SLEEP || RUNTIME */ |
057c58bf | 476 | |
3da7cff4 AS |
477 | #ifdef CONFIG_PM_SLEEP |
478 | ||
479 | static int hcd_pci_suspend(struct device *dev) | |
480 | { | |
481 | return suspend_common(dev, device_may_wakeup(dev)); | |
482 | } | |
483 | ||
abb30641 AS |
484 | static int hcd_pci_suspend_noirq(struct device *dev) |
485 | { | |
486 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
487 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
488 | int retval; | |
489 | ||
490 | retval = check_root_hub_suspended(dev); | |
491 | if (retval) | |
492 | return retval; | |
a15d95a0 | 493 | |
abb30641 | 494 | pci_save_state(pci_dev); |
a15d95a0 | 495 | |
ff9d78b3 SS |
496 | /* If the root hub is dead rather than suspended, disallow remote |
497 | * wakeup. usb_hc_died() should ensure that both hosts are marked as | |
498 | * dying, so we only need to check the primary roothub. | |
1da177e4 | 499 | */ |
9b37596a | 500 | if (HCD_DEAD(hcd)) |
abb30641 AS |
501 | device_set_wakeup_enable(dev, 0); |
502 | dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev)); | |
a0d4922d | 503 | |
abb30641 AS |
504 | /* Possibly enable remote wakeup, |
505 | * choose the appropriate low-power state, and go to that state. | |
506 | */ | |
507 | retval = pci_prepare_to_sleep(pci_dev); | |
508 | if (retval == -EIO) { /* Low-power not supported */ | |
509 | dev_dbg(dev, "--> PCI D0 legacy\n"); | |
510 | retval = 0; | |
511 | } else if (retval == 0) { | |
512 | dev_dbg(dev, "--> PCI %s\n", | |
513 | pci_power_name(pci_dev->current_state)); | |
a0d4922d | 514 | } else { |
abb30641 AS |
515 | suspend_report_result(pci_prepare_to_sleep, retval); |
516 | return retval; | |
1da177e4 LT |
517 | } |
518 | ||
2138a1f1 | 519 | powermac_set_asic(pci_dev, 0); |
1da177e4 LT |
520 | return retval; |
521 | } | |
1da177e4 | 522 | |
abb30641 | 523 | static int hcd_pci_resume_noirq(struct device *dev) |
a0d4922d | 524 | { |
abb30641 | 525 | struct pci_dev *pci_dev = to_pci_dev(dev); |
a0d4922d | 526 | |
2138a1f1 | 527 | powermac_set_asic(pci_dev, 1); |
a15d95a0 | 528 | |
abb30641 AS |
529 | /* Go back to D0 and disable remote wakeup */ |
530 | pci_back_from_sleep(pci_dev); | |
531 | return 0; | |
532 | } | |
533 | ||
abb30641 | 534 | static int hcd_pci_resume(struct device *dev) |
64a21d02 | 535 | { |
057c58bf | 536 | return resume_common(dev, PM_EVENT_RESUME); |
abb30641 | 537 | } |
64a21d02 | 538 | |
abb30641 AS |
539 | static int hcd_pci_restore(struct device *dev) |
540 | { | |
057c58bf | 541 | return resume_common(dev, PM_EVENT_RESTORE); |
64a21d02 | 542 | } |
1da177e4 | 543 | |
3da7cff4 AS |
544 | #else |
545 | ||
546 | #define hcd_pci_suspend NULL | |
547 | #define hcd_pci_suspend_noirq NULL | |
548 | #define hcd_pci_resume_noirq NULL | |
549 | #define hcd_pci_resume NULL | |
550 | #define hcd_pci_restore NULL | |
551 | ||
552 | #endif /* CONFIG_PM_SLEEP */ | |
553 | ||
554 | #ifdef CONFIG_PM_RUNTIME | |
555 | ||
556 | static int hcd_pci_runtime_suspend(struct device *dev) | |
557 | { | |
558 | int retval; | |
559 | ||
560 | retval = suspend_common(dev, true); | |
561 | if (retval == 0) | |
562 | powermac_set_asic(to_pci_dev(dev), 0); | |
563 | dev_dbg(dev, "hcd_pci_runtime_suspend: %d\n", retval); | |
564 | return retval; | |
565 | } | |
566 | ||
567 | static int hcd_pci_runtime_resume(struct device *dev) | |
568 | { | |
569 | int retval; | |
570 | ||
571 | powermac_set_asic(to_pci_dev(dev), 1); | |
572 | retval = resume_common(dev, PM_EVENT_AUTO_RESUME); | |
573 | dev_dbg(dev, "hcd_pci_runtime_resume: %d\n", retval); | |
574 | return retval; | |
575 | } | |
576 | ||
577 | #else | |
578 | ||
579 | #define hcd_pci_runtime_suspend NULL | |
580 | #define hcd_pci_runtime_resume NULL | |
581 | ||
582 | #endif /* CONFIG_PM_RUNTIME */ | |
583 | ||
47145210 | 584 | const struct dev_pm_ops usb_hcd_pci_pm_ops = { |
abb30641 AS |
585 | .suspend = hcd_pci_suspend, |
586 | .suspend_noirq = hcd_pci_suspend_noirq, | |
587 | .resume_noirq = hcd_pci_resume_noirq, | |
588 | .resume = hcd_pci_resume, | |
589 | .freeze = check_root_hub_suspended, | |
590 | .freeze_noirq = check_root_hub_suspended, | |
591 | .thaw_noirq = NULL, | |
592 | .thaw = NULL, | |
593 | .poweroff = hcd_pci_suspend, | |
594 | .poweroff_noirq = hcd_pci_suspend_noirq, | |
595 | .restore_noirq = hcd_pci_resume_noirq, | |
596 | .restore = hcd_pci_restore, | |
3da7cff4 AS |
597 | .runtime_suspend = hcd_pci_runtime_suspend, |
598 | .runtime_resume = hcd_pci_runtime_resume, | |
abb30641 AS |
599 | }; |
600 | EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops); | |
601 | ||
aa338601 | 602 | #endif /* CONFIG_PM */ |