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; | |
00eed9c8 | 176 | int hcd_irq = 0; |
1da177e4 LT |
177 | |
178 | if (usb_disabled()) | |
179 | return -ENODEV; | |
180 | ||
34bbe4c1 GKH |
181 | if (!id) |
182 | return -EINVAL; | |
183 | driver = (struct hc_driver *)id->driver_data; | |
184 | if (!driver) | |
1da177e4 LT |
185 | return -EINVAL; |
186 | ||
34bbe4c1 | 187 | if (pci_enable_device(dev) < 0) |
1da177e4 | 188 | return -ENODEV; |
c6053ecf | 189 | dev->current_state = PCI_D0; |
34bbe4c1 | 190 | |
00eed9c8 HR |
191 | /* |
192 | * The xHCI driver has its own irq management | |
193 | * make sure irq setup is not touched for xhci in generic hcd code | |
68d07f64 | 194 | */ |
00eed9c8 HR |
195 | if ((driver->flags & HCD_MASK) != HCD_USB3) { |
196 | if (!dev->irq) { | |
197 | dev_err(&dev->dev, | |
198 | "Found HC with no IRQ. Check BIOS/PCI %s setup!\n", | |
199 | pci_name(dev)); | |
200 | retval = -ENODEV; | |
201 | goto disable_pci; | |
202 | } | |
203 | hcd_irq = dev->irq; | |
34bbe4c1 | 204 | } |
1da177e4 | 205 | |
34bbe4c1 | 206 | hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev)); |
1da177e4 LT |
207 | if (!hcd) { |
208 | retval = -ENOMEM; | |
8766c815 | 209 | goto disable_pci; |
1da177e4 LT |
210 | } |
211 | ||
34bbe4c1 GKH |
212 | if (driver->flags & HCD_MEMORY) { |
213 | /* EHCI, OHCI */ | |
214 | hcd->rsrc_start = pci_resource_start(dev, 0); | |
215 | hcd->rsrc_len = pci_resource_len(dev, 0); | |
216 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, | |
1da177e4 | 217 | driver->description)) { |
34bbe4c1 | 218 | dev_dbg(&dev->dev, "controller already in use\n"); |
1da177e4 | 219 | retval = -EBUSY; |
8766c815 | 220 | goto clear_companion; |
1da177e4 | 221 | } |
34bbe4c1 | 222 | hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 223 | if (hcd->regs == NULL) { |
34bbe4c1 | 224 | dev_dbg(&dev->dev, "error mapping memory\n"); |
1da177e4 | 225 | retval = -EFAULT; |
8766c815 | 226 | goto release_mem_region; |
1da177e4 LT |
227 | } |
228 | ||
34bbe4c1 GKH |
229 | } else { |
230 | /* UHCI */ | |
1da177e4 LT |
231 | int region; |
232 | ||
233 | for (region = 0; region < PCI_ROM_RESOURCE; region++) { | |
34bbe4c1 | 234 | if (!(pci_resource_flags(dev, region) & |
1da177e4 LT |
235 | IORESOURCE_IO)) |
236 | continue; | |
237 | ||
34bbe4c1 GKH |
238 | hcd->rsrc_start = pci_resource_start(dev, region); |
239 | hcd->rsrc_len = pci_resource_len(dev, region); | |
240 | if (request_region(hcd->rsrc_start, hcd->rsrc_len, | |
1da177e4 LT |
241 | driver->description)) |
242 | break; | |
243 | } | |
244 | if (region == PCI_ROM_RESOURCE) { | |
34bbe4c1 | 245 | dev_dbg(&dev->dev, "no i/o regions available\n"); |
1da177e4 | 246 | retval = -EBUSY; |
8766c815 | 247 | goto clear_companion; |
1da177e4 LT |
248 | } |
249 | } | |
250 | ||
34bbe4c1 | 251 | pci_set_master(dev); |
1da177e4 | 252 | |
00eed9c8 | 253 | retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED); |
1da177e4 | 254 | if (retval != 0) |
8766c815 | 255 | goto unmap_registers; |
6d19c009 | 256 | set_hs_companion(dev, hcd); |
3da7cff4 AS |
257 | |
258 | if (pci_dev_run_wake(dev)) | |
259 | pm_runtime_put_noidle(&dev->dev); | |
1da177e4 LT |
260 | return retval; |
261 | ||
8766c815 | 262 | unmap_registers: |
1da177e4 | 263 | if (driver->flags & HCD_MEMORY) { |
34bbe4c1 | 264 | iounmap(hcd->regs); |
8766c815 | 265 | release_mem_region: |
34bbe4c1 | 266 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 267 | } else |
34bbe4c1 | 268 | release_region(hcd->rsrc_start, hcd->rsrc_len); |
8766c815 | 269 | clear_companion: |
6d19c009 | 270 | clear_hs_companion(dev, hcd); |
34bbe4c1 | 271 | usb_put_hcd(hcd); |
8766c815 | 272 | disable_pci: |
34bbe4c1 GKH |
273 | pci_disable_device(dev); |
274 | dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval); | |
1da177e4 | 275 | return retval; |
34bbe4c1 | 276 | } |
782e70c6 | 277 | EXPORT_SYMBOL_GPL(usb_hcd_pci_probe); |
1da177e4 LT |
278 | |
279 | ||
280 | /* may be called without controller electrically present */ | |
281 | /* may be called with controller, bus, and devices active */ | |
282 | ||
283 | /** | |
284 | * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs | |
285 | * @dev: USB Host Controller being removed | |
286 | * Context: !in_interrupt() | |
287 | * | |
288 | * Reverses the effect of usb_hcd_pci_probe(), first invoking | |
289 | * the HCD's stop() method. It is always called from a thread | |
290 | * context, normally "rmmod", "apmd", or something similar. | |
291 | * | |
292 | * Store this function in the HCD's struct pci_driver as remove(). | |
293 | */ | |
34bbe4c1 | 294 | void usb_hcd_pci_remove(struct pci_dev *dev) |
1da177e4 LT |
295 | { |
296 | struct usb_hcd *hcd; | |
297 | ||
298 | hcd = pci_get_drvdata(dev); | |
299 | if (!hcd) | |
300 | return; | |
301 | ||
3da7cff4 AS |
302 | if (pci_dev_run_wake(dev)) |
303 | pm_runtime_get_noresume(&dev->dev); | |
304 | ||
c548795a AS |
305 | /* Fake an interrupt request in order to give the driver a chance |
306 | * to test whether the controller hardware has been removed (e.g., | |
307 | * cardbus physical eject). | |
308 | */ | |
309 | local_irq_disable(); | |
310 | usb_hcd_irq(0, hcd); | |
311 | local_irq_enable(); | |
312 | ||
34bbe4c1 | 313 | usb_remove_hcd(hcd); |
1da177e4 | 314 | if (hcd->driver->flags & HCD_MEMORY) { |
34bbe4c1 GKH |
315 | iounmap(hcd->regs); |
316 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
1da177e4 | 317 | } else { |
34bbe4c1 | 318 | release_region(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 319 | } |
6d19c009 | 320 | clear_hs_companion(dev, hcd); |
34bbe4c1 | 321 | usb_put_hcd(hcd); |
1da177e4 LT |
322 | pci_disable_device(dev); |
323 | } | |
782e70c6 | 324 | EXPORT_SYMBOL_GPL(usb_hcd_pci_remove); |
1da177e4 | 325 | |
1da177e4 | 326 | /** |
abb30641 AS |
327 | * usb_hcd_pci_shutdown - shutdown host controller |
328 | * @dev: USB Host Controller being shutdown | |
1da177e4 | 329 | */ |
abb30641 AS |
330 | void usb_hcd_pci_shutdown(struct pci_dev *dev) |
331 | { | |
332 | struct usb_hcd *hcd; | |
333 | ||
334 | hcd = pci_get_drvdata(dev); | |
335 | if (!hcd) | |
336 | return; | |
337 | ||
3da7cff4 | 338 | if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) && |
3df7169e | 339 | hcd->driver->shutdown) { |
abb30641 | 340 | hcd->driver->shutdown(hcd); |
3df7169e AS |
341 | pci_disable_device(dev); |
342 | } | |
abb30641 AS |
343 | } |
344 | EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown); | |
345 | ||
aa338601 | 346 | #ifdef CONFIG_PM |
abb30641 | 347 | |
2138a1f1 AS |
348 | #ifdef CONFIG_PPC_PMAC |
349 | static void powermac_set_asic(struct pci_dev *pci_dev, int enable) | |
350 | { | |
351 | /* Enanble or disable ASIC clocks for USB */ | |
352 | if (machine_is(powermac)) { | |
353 | struct device_node *of_node; | |
354 | ||
355 | of_node = pci_device_to_OF_node(pci_dev); | |
356 | if (of_node) | |
357 | pmac_call_feature(PMAC_FTR_USB_ENABLE, | |
358 | of_node, 0, enable); | |
359 | } | |
360 | } | |
361 | ||
362 | #else | |
363 | ||
364 | static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable) | |
365 | {} | |
366 | ||
367 | #endif /* CONFIG_PPC_PMAC */ | |
368 | ||
abb30641 AS |
369 | static int check_root_hub_suspended(struct device *dev) |
370 | { | |
371 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
372 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
373 | ||
9b37596a | 374 | if (HCD_RH_RUNNING(hcd)) { |
abb30641 AS |
375 | dev_warn(dev, "Root hub is not suspended\n"); |
376 | return -EBUSY; | |
377 | } | |
ff9d78b3 SS |
378 | if (hcd->shared_hcd) { |
379 | hcd = hcd->shared_hcd; | |
380 | if (HCD_RH_RUNNING(hcd)) { | |
381 | dev_warn(dev, "Secondary root hub is not suspended\n"); | |
382 | return -EBUSY; | |
383 | } | |
384 | } | |
abb30641 AS |
385 | return 0; |
386 | } | |
387 | ||
87364624 | 388 | #if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM_RUNTIME) |
3da7cff4 | 389 | static int suspend_common(struct device *dev, bool do_wakeup) |
1da177e4 | 390 | { |
abb30641 AS |
391 | struct pci_dev *pci_dev = to_pci_dev(dev); |
392 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
393 | int retval; | |
1da177e4 | 394 | |
5f827ea3 DB |
395 | /* Root hub suspend should have stopped all downstream traffic, |
396 | * and all bus master traffic. And done so for both the interface | |
397 | * and the stub usb_device (which we check here). But maybe it | |
398 | * didn't; writing sysfs power/state files ignores such rules... | |
5f827ea3 | 399 | */ |
abb30641 AS |
400 | retval = check_root_hub_suspended(dev); |
401 | if (retval) | |
402 | return retval; | |
a0d4922d | 403 | |
9b37596a | 404 | if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) { |
ff2f0787 AS |
405 | /* Optimization: Don't suspend if a root-hub wakeup is |
406 | * pending and it would cause the HCD to wake up anyway. | |
407 | */ | |
408 | if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) | |
409 | return -EBUSY; | |
ff9d78b3 SS |
410 | if (do_wakeup && hcd->shared_hcd && |
411 | HCD_WAKEUP_PENDING(hcd->shared_hcd)) | |
412 | return -EBUSY; | |
4147200d | 413 | retval = hcd->driver->pci_suspend(hcd, do_wakeup); |
7be7d741 | 414 | suspend_report_result(hcd->driver->pci_suspend, retval); |
ff2f0787 AS |
415 | |
416 | /* Check again in case wakeup raced with pci_suspend */ | |
ff9d78b3 SS |
417 | if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) || |
418 | (retval == 0 && do_wakeup && hcd->shared_hcd && | |
419 | HCD_WAKEUP_PENDING(hcd->shared_hcd))) { | |
ff2f0787 AS |
420 | if (hcd->driver->pci_resume) |
421 | hcd->driver->pci_resume(hcd, false); | |
422 | retval = -EBUSY; | |
423 | } | |
02669492 | 424 | if (retval) |
abb30641 | 425 | return retval; |
5f827ea3 DB |
426 | } |
427 | ||
0029227f AX |
428 | /* If MSI-X is enabled, the driver will have synchronized all vectors |
429 | * in pci_suspend(). If MSI or legacy PCI is enabled, that will be | |
430 | * synchronized here. | |
431 | */ | |
432 | if (!hcd->msix_enabled) | |
433 | synchronize_irq(pci_dev->irq); | |
c6053ecf | 434 | |
a15d95a0 RW |
435 | /* Downstream ports from this root hub should already be quiesced, so |
436 | * there will be no DMA activity. Now we can shut down the upstream | |
abb30641 AS |
437 | * link (except maybe for PME# resume signaling). We'll enter a |
438 | * low power state during suspend_noirq, if the hardware allows. | |
a15d95a0 | 439 | */ |
abb30641 AS |
440 | pci_disable_device(pci_dev); |
441 | return retval; | |
442 | } | |
443 | ||
057c58bf AS |
444 | static int resume_common(struct device *dev, int event) |
445 | { | |
446 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
447 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
448 | int retval; | |
449 | ||
ff9d78b3 SS |
450 | if (HCD_RH_RUNNING(hcd) || |
451 | (hcd->shared_hcd && | |
452 | HCD_RH_RUNNING(hcd->shared_hcd))) { | |
057c58bf AS |
453 | dev_dbg(dev, "can't resume, not suspended!\n"); |
454 | return 0; | |
455 | } | |
456 | ||
457 | retval = pci_enable_device(pci_dev); | |
458 | if (retval < 0) { | |
459 | dev_err(dev, "can't re-enable after resume, %d!\n", retval); | |
460 | return retval; | |
461 | } | |
462 | ||
463 | pci_set_master(pci_dev); | |
464 | ||
9b37596a | 465 | if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) { |
3da7cff4 AS |
466 | if (event != PM_EVENT_AUTO_RESUME) |
467 | wait_for_companions(pci_dev, hcd); | |
057c58bf AS |
468 | |
469 | retval = hcd->driver->pci_resume(hcd, | |
470 | event == PM_EVENT_RESTORE); | |
471 | if (retval) { | |
472 | dev_err(dev, "PCI post-resume error %d!\n", retval); | |
ff9d78b3 SS |
473 | if (hcd->shared_hcd) |
474 | usb_hc_died(hcd->shared_hcd); | |
057c58bf AS |
475 | usb_hc_died(hcd); |
476 | } | |
477 | } | |
478 | return retval; | |
479 | } | |
87364624 | 480 | #endif /* SLEEP || RUNTIME */ |
057c58bf | 481 | |
3da7cff4 AS |
482 | #ifdef CONFIG_PM_SLEEP |
483 | ||
484 | static int hcd_pci_suspend(struct device *dev) | |
485 | { | |
486 | return suspend_common(dev, device_may_wakeup(dev)); | |
487 | } | |
488 | ||
abb30641 AS |
489 | static int hcd_pci_suspend_noirq(struct device *dev) |
490 | { | |
491 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
492 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
493 | int retval; | |
494 | ||
495 | retval = check_root_hub_suspended(dev); | |
496 | if (retval) | |
497 | return retval; | |
a15d95a0 | 498 | |
abb30641 | 499 | pci_save_state(pci_dev); |
a15d95a0 | 500 | |
ff9d78b3 SS |
501 | /* If the root hub is dead rather than suspended, disallow remote |
502 | * wakeup. usb_hc_died() should ensure that both hosts are marked as | |
503 | * dying, so we only need to check the primary roothub. | |
1da177e4 | 504 | */ |
9b37596a | 505 | if (HCD_DEAD(hcd)) |
abb30641 AS |
506 | device_set_wakeup_enable(dev, 0); |
507 | dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev)); | |
a0d4922d | 508 | |
abb30641 AS |
509 | /* Possibly enable remote wakeup, |
510 | * choose the appropriate low-power state, and go to that state. | |
511 | */ | |
512 | retval = pci_prepare_to_sleep(pci_dev); | |
513 | if (retval == -EIO) { /* Low-power not supported */ | |
514 | dev_dbg(dev, "--> PCI D0 legacy\n"); | |
515 | retval = 0; | |
516 | } else if (retval == 0) { | |
517 | dev_dbg(dev, "--> PCI %s\n", | |
518 | pci_power_name(pci_dev->current_state)); | |
a0d4922d | 519 | } else { |
abb30641 AS |
520 | suspend_report_result(pci_prepare_to_sleep, retval); |
521 | return retval; | |
1da177e4 LT |
522 | } |
523 | ||
2138a1f1 | 524 | powermac_set_asic(pci_dev, 0); |
1da177e4 LT |
525 | return retval; |
526 | } | |
1da177e4 | 527 | |
abb30641 | 528 | static int hcd_pci_resume_noirq(struct device *dev) |
a0d4922d | 529 | { |
abb30641 | 530 | struct pci_dev *pci_dev = to_pci_dev(dev); |
a0d4922d | 531 | |
2138a1f1 | 532 | powermac_set_asic(pci_dev, 1); |
a15d95a0 | 533 | |
abb30641 AS |
534 | /* Go back to D0 and disable remote wakeup */ |
535 | pci_back_from_sleep(pci_dev); | |
536 | return 0; | |
537 | } | |
538 | ||
abb30641 | 539 | static int hcd_pci_resume(struct device *dev) |
64a21d02 | 540 | { |
057c58bf | 541 | return resume_common(dev, PM_EVENT_RESUME); |
abb30641 | 542 | } |
64a21d02 | 543 | |
abb30641 AS |
544 | static int hcd_pci_restore(struct device *dev) |
545 | { | |
057c58bf | 546 | return resume_common(dev, PM_EVENT_RESTORE); |
64a21d02 | 547 | } |
1da177e4 | 548 | |
3da7cff4 AS |
549 | #else |
550 | ||
551 | #define hcd_pci_suspend NULL | |
552 | #define hcd_pci_suspend_noirq NULL | |
553 | #define hcd_pci_resume_noirq NULL | |
554 | #define hcd_pci_resume NULL | |
555 | #define hcd_pci_restore NULL | |
556 | ||
557 | #endif /* CONFIG_PM_SLEEP */ | |
558 | ||
559 | #ifdef CONFIG_PM_RUNTIME | |
560 | ||
561 | static int hcd_pci_runtime_suspend(struct device *dev) | |
562 | { | |
563 | int retval; | |
564 | ||
565 | retval = suspend_common(dev, true); | |
566 | if (retval == 0) | |
567 | powermac_set_asic(to_pci_dev(dev), 0); | |
568 | dev_dbg(dev, "hcd_pci_runtime_suspend: %d\n", retval); | |
569 | return retval; | |
570 | } | |
571 | ||
572 | static int hcd_pci_runtime_resume(struct device *dev) | |
573 | { | |
574 | int retval; | |
575 | ||
576 | powermac_set_asic(to_pci_dev(dev), 1); | |
577 | retval = resume_common(dev, PM_EVENT_AUTO_RESUME); | |
578 | dev_dbg(dev, "hcd_pci_runtime_resume: %d\n", retval); | |
579 | return retval; | |
580 | } | |
581 | ||
582 | #else | |
583 | ||
584 | #define hcd_pci_runtime_suspend NULL | |
585 | #define hcd_pci_runtime_resume NULL | |
586 | ||
587 | #endif /* CONFIG_PM_RUNTIME */ | |
588 | ||
47145210 | 589 | const struct dev_pm_ops usb_hcd_pci_pm_ops = { |
abb30641 AS |
590 | .suspend = hcd_pci_suspend, |
591 | .suspend_noirq = hcd_pci_suspend_noirq, | |
592 | .resume_noirq = hcd_pci_resume_noirq, | |
593 | .resume = hcd_pci_resume, | |
594 | .freeze = check_root_hub_suspended, | |
595 | .freeze_noirq = check_root_hub_suspended, | |
596 | .thaw_noirq = NULL, | |
597 | .thaw = NULL, | |
598 | .poweroff = hcd_pci_suspend, | |
599 | .poweroff_noirq = hcd_pci_suspend_noirq, | |
600 | .restore_noirq = hcd_pci_resume_noirq, | |
601 | .restore = hcd_pci_restore, | |
3da7cff4 AS |
602 | .runtime_suspend = hcd_pci_runtime_suspend, |
603 | .runtime_resume = hcd_pci_runtime_resume, | |
abb30641 AS |
604 | }; |
605 | EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops); | |
606 | ||
aa338601 | 607 | #endif /* CONFIG_PM */ |