drivers/usb/core/hcd-pci.c

   1 /*
   2  * (C) Copyright David Brownell 2000-2002
   3  *
   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
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/pci.h>
  22 #include <linux/usb.h>
  23 #include <linux/usb/hcd.h>
  24
  25 #include <asm/io.h>
  26 #include <asm/irq.h>
  27
  28 #ifdef CONFIG_PPC_PMAC
  29 #include <asm/machdep.h>
  30 #include <asm/pmac_feature.h>
  31 #include <asm/prom.h>
  32 #endif
  33
  34 #include "usb.h"
  35
  36
  37 /* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
  38
  39 /*
  40  * Coordinate handoffs between EHCI and companion controllers
  41  * during EHCI probing and system resume.
  42  */
  43
  44 static DECLARE_RWSEM(companions_rwsem);
  45
  46 #define CL_UHCI         PCI_CLASS_SERIAL_USB_UHCI
  47 #define CL_OHCI         PCI_CLASS_SERIAL_USB_OHCI
  48 #define CL_EHCI         PCI_CLASS_SERIAL_USB_EHCI
  49
  50 static inline int is_ohci_or_uhci(struct pci_dev *pdev)
  51 {
  52         return pdev->class == CL_OHCI || pdev->class == CL_UHCI;
  53 }
  54
  55 typedef void (*companion_fn)(struct pci_dev *pdev, struct usb_hcd *hcd,
  56                 struct pci_dev *companion, struct usb_hcd *companion_hcd);
  57
  58 /* Iterate over PCI devices in the same slot as pdev and call fn for each */
  59 static void for_each_companion(struct pci_dev *pdev, struct usb_hcd *hcd,
  60                 companion_fn fn)
  61 {
  62         struct pci_dev          *companion;
  63         struct usb_hcd          *companion_hcd;
  64         unsigned int            slot = PCI_SLOT(pdev->devfn);
  65
  66         /*
  67          * Iterate through other PCI functions in the same slot.
  68          * If the function's drvdata isn't set then it isn't bound to
  69          * a USB host controller driver, so skip it.
  70          */
  71         companion = NULL;
  72         for_each_pci_dev(companion) {
  73                 if (companion->bus != pdev->bus ||
  74                                 PCI_SLOT(companion->devfn) != slot)
  75                         continue;
  76
  77                 /*
  78                  * Companion device should be either UHCI,OHCI or EHCI host
  79                  * controller, otherwise skip.
  80                  */
  81                 if (companion->class != CL_UHCI && companion->class != CL_OHCI &&
  82                                 companion->class != CL_EHCI)
  83                         continue;
  84
  85                 companion_hcd = pci_get_drvdata(companion);
  86                 if (!companion_hcd || !companion_hcd->self.root_hub)
  87                         continue;
  88                 fn(pdev, hcd, companion, companion_hcd);
  89         }
  90 }
  91
  92 /*
  93  * We're about to add an EHCI controller, which will unceremoniously grab
  94  * all the port connections away from its companions.  To prevent annoying
  95  * error messages, lock the companion's root hub and gracefully unconfigure
  96  * it beforehand.  Leave it locked until the EHCI controller is all set.
  97  */
  98 static void ehci_pre_add(struct pci_dev *pdev, struct usb_hcd *hcd,
  99                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 100 {
 101         struct usb_device *udev;
 102
 103         if (is_ohci_or_uhci(companion)) {
 104                 udev = companion_hcd->self.root_hub;
 105                 usb_lock_device(udev);
 106                 usb_set_configuration(udev, 0);
 107         }
 108 }
 109
 110 /*
 111  * Adding the EHCI controller has either succeeded or failed.  Set the
 112  * companion pointer accordingly, and in either case, reconfigure and
 113  * unlock the root hub.
 114  */
 115 static void ehci_post_add(struct pci_dev *pdev, struct usb_hcd *hcd,
 116                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 117 {
 118         struct usb_device *udev;
 119
 120         if (is_ohci_or_uhci(companion)) {
 121                 if (dev_get_drvdata(&pdev->dev)) {      /* Succeeded */
 122                         dev_dbg(&pdev->dev, "HS companion for %s\n",
 123                                         dev_name(&companion->dev));
 124                         companion_hcd->self.hs_companion = &hcd->self;
 125                 }
 126                 udev = companion_hcd->self.root_hub;
 127                 usb_set_configuration(udev, 1);
 128                 usb_unlock_device(udev);
 129         }
 130 }
 131
 132 /*
 133  * We just added a non-EHCI controller.  Find the EHCI controller to
 134  * which it is a companion, and store a pointer to the bus structure.
 135  */
 136 static void non_ehci_add(struct pci_dev *pdev, struct usb_hcd *hcd,
 137                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 138 {
 139         if (is_ohci_or_uhci(pdev) && companion->class == CL_EHCI) {
 140                 dev_dbg(&pdev->dev, "FS/LS companion for %s\n",
 141                                 dev_name(&companion->dev));
 142                 hcd->self.hs_companion = &companion_hcd->self;
 143         }
 144 }
 145
 146 /* We are removing an EHCI controller.  Clear the companions' pointers. */
 147 static void ehci_remove(struct pci_dev *pdev, struct usb_hcd *hcd,
 148                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 149 {
 150         if (is_ohci_or_uhci(companion))
 151                 companion_hcd->self.hs_companion = NULL;
 152 }
 153
 154 #ifdef  CONFIG_PM
 155
 156 /* An EHCI controller must wait for its companions before resuming. */
 157 static void ehci_wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd,
 158                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 159 {
 160         if (is_ohci_or_uhci(companion))
 161                 device_pm_wait_for_dev(&pdev->dev, &companion->dev);
 162 }
 163
 164 #endif  /* CONFIG_PM */
 165
 166 /*-------------------------------------------------------------------------*/
 167
 168 /* configure so an HC device and id are always provided */
 169 /* always called with process context; sleeping is OK */
 170
 171 /**
 172  * usb_hcd_pci_probe - initialize PCI-based HCDs
 173  * @dev: USB Host Controller being probed
 174  * @id: pci hotplug id connecting controller to HCD framework
 175  * Context: !in_interrupt()
 176  *
 177  * Allocates basic PCI resources for this USB host controller, and
 178  * then invokes the start() method for the HCD associated with it
 179  * through the hotplug entry's driver_data.
 180  *
 181  * Store this function in the HCD's struct pci_driver as probe().
 182  *
 183  * Return: 0 if successful.
 184  */
 185 int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 186 {
 187         struct hc_driver        *driver;
 188         struct usb_hcd          *hcd;
 189         int                     retval;
 190         int                     hcd_irq = 0;
 191
 192         if (usb_disabled())
 193                 return -ENODEV;
 194
 195         if (!id)
 196                 return -EINVAL;
 197         driver = (struct hc_driver *)id->driver_data;
 198         if (!driver)
 199                 return -EINVAL;
 200
 201         if (pci_enable_device(dev) < 0)
 202                 return -ENODEV;
 203
 204         /*
 205          * The xHCI driver has its own irq management
 206          * make sure irq setup is not touched for xhci in generic hcd code
 207          */
 208         if ((driver->flags & HCD_MASK) < HCD_USB3) {
 209                 if (!dev->irq) {
 210                         dev_err(&dev->dev,
 211                         "Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
 212                                 pci_name(dev));
 213                         retval = -ENODEV;
 214                         goto disable_pci;
 215                 }
 216                 hcd_irq = dev->irq;
 217         }
 218
 219         hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
 220         if (!hcd) {
 221                 retval = -ENOMEM;
 222                 goto disable_pci;
 223         }
 224
 225         hcd->amd_resume_bug = (usb_hcd_amd_remote_wakeup_quirk(dev) &&
 226                         driver->flags & (HCD_USB11 | HCD_USB3)) ? 1 : 0;
 227
 228         if (driver->flags & HCD_MEMORY) {
 229                 /* EHCI, OHCI */
 230                 hcd->rsrc_start = pci_resource_start(dev, 0);
 231                 hcd->rsrc_len = pci_resource_len(dev, 0);
 232                 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 233                                 driver->description)) {
 234                         dev_dbg(&dev->dev, "controller already in use\n");
 235                         retval = -EBUSY;
 236                         goto put_hcd;
 237                 }
 238                 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 239                 if (hcd->regs == NULL) {
 240                         dev_dbg(&dev->dev, "error mapping memory\n");
 241                         retval = -EFAULT;
 242                         goto release_mem_region;
 243                 }
 244
 245         } else {
 246                 /* UHCI */
 247                 int     region;
 248
 249                 for (region = 0; region < PCI_ROM_RESOURCE; region++) {
 250                         if (!(pci_resource_flags(dev, region) &
 251                                         IORESOURCE_IO))
 252                                 continue;
 253
 254                         hcd->rsrc_start = pci_resource_start(dev, region);
 255                         hcd->rsrc_len = pci_resource_len(dev, region);
 256                         if (request_region(hcd->rsrc_start, hcd->rsrc_len,
 257                                         driver->description))
 258                                 break;
 259                 }
 260                 if (region == PCI_ROM_RESOURCE) {
 261                         dev_dbg(&dev->dev, "no i/o regions available\n");
 262                         retval = -EBUSY;
 263                         goto put_hcd;
 264                 }
 265         }
 266
 267         pci_set_master(dev);
 268
 269         /* Note: dev_set_drvdata must be called while holding the rwsem */
 270         if (dev->class == CL_EHCI) {
 271                 down_write(&companions_rwsem);
 272                 dev_set_drvdata(&dev->dev, hcd);
 273                 for_each_companion(dev, hcd, ehci_pre_add);
 274                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 275                 if (retval != 0)
 276                         dev_set_drvdata(&dev->dev, NULL);
 277                 for_each_companion(dev, hcd, ehci_post_add);
 278                 up_write(&companions_rwsem);
 279         } else {
 280                 down_read(&companions_rwsem);
 281                 dev_set_drvdata(&dev->dev, hcd);
 282                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 283                 if (retval != 0)
 284                         dev_set_drvdata(&dev->dev, NULL);
 285                 else
 286                         for_each_companion(dev, hcd, non_ehci_add);
 287                 up_read(&companions_rwsem);
 288         }
 289
 290         if (retval != 0)
 291                 goto unmap_registers;
 292         device_wakeup_enable(hcd->self.controller);
 293
 294         if (pci_dev_run_wake(dev))
 295                 pm_runtime_put_noidle(&dev->dev);
 296         return retval;
 297
 298 unmap_registers:
 299         if (driver->flags & HCD_MEMORY) {
 300                 iounmap(hcd->regs);
 301 release_mem_region:
 302                 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 303         } else
 304                 release_region(hcd->rsrc_start, hcd->rsrc_len);
 305 put_hcd:
 306         usb_put_hcd(hcd);
 307 disable_pci:
 308         pci_disable_device(dev);
 309         dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
 310         return retval;
 311 }
 312 EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
 313
 314
 315 /* may be called without controller electrically present */
 316 /* may be called with controller, bus, and devices active */
 317
 318 /**
 319  * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
 320  * @dev: USB Host Controller being removed
 321  * Context: !in_interrupt()
 322  *
 323  * Reverses the effect of usb_hcd_pci_probe(), first invoking
 324  * the HCD's stop() method.  It is always called from a thread
 325  * context, normally "rmmod", "apmd", or something similar.
 326  *
 327  * Store this function in the HCD's struct pci_driver as remove().
 328  */
 329 void usb_hcd_pci_remove(struct pci_dev *dev)
 330 {
 331         struct usb_hcd          *hcd;
 332
 333         hcd = pci_get_drvdata(dev);
 334         if (!hcd)
 335                 return;
 336
 337         if (pci_dev_run_wake(dev))
 338                 pm_runtime_get_noresume(&dev->dev);
 339
 340         /* Fake an interrupt request in order to give the driver a chance
 341          * to test whether the controller hardware has been removed (e.g.,
 342          * cardbus physical eject).
 343          */
 344         local_irq_disable();
 345         usb_hcd_irq(0, hcd);
 346         local_irq_enable();
 347
 348         /* Note: dev_set_drvdata must be called while holding the rwsem */
 349         if (dev->class == CL_EHCI) {
 350                 down_write(&companions_rwsem);
 351                 for_each_companion(dev, hcd, ehci_remove);
 352                 usb_remove_hcd(hcd);
 353                 dev_set_drvdata(&dev->dev, NULL);
 354                 up_write(&companions_rwsem);
 355         } else {
 356                 /* Not EHCI; just clear the companion pointer */
 357                 down_read(&companions_rwsem);
 358                 hcd->self.hs_companion = NULL;
 359                 usb_remove_hcd(hcd);
 360                 dev_set_drvdata(&dev->dev, NULL);
 361                 up_read(&companions_rwsem);
 362         }
 363
 364         if (hcd->driver->flags & HCD_MEMORY) {
 365                 iounmap(hcd->regs);
 366                 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 367         } else {
 368                 release_region(hcd->rsrc_start, hcd->rsrc_len);
 369         }
 370
 371         usb_put_hcd(hcd);
 372         pci_disable_device(dev);
 373 }
 374 EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
 375
 376 /**
 377  * usb_hcd_pci_shutdown - shutdown host controller
 378  * @dev: USB Host Controller being shutdown
 379  */
 380 void usb_hcd_pci_shutdown(struct pci_dev *dev)
 381 {
 382         struct usb_hcd          *hcd;
 383
 384         hcd = pci_get_drvdata(dev);
 385         if (!hcd)
 386                 return;
 387
 388         if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&
 389                         hcd->driver->shutdown) {
 390                 hcd->driver->shutdown(hcd);
 391                 if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0)
 392                         free_irq(hcd->irq, hcd);
 393                 pci_disable_device(dev);
 394         }
 395 }
 396 EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
 397
 398 #ifdef  CONFIG_PM
 399
 400 #ifdef  CONFIG_PPC_PMAC
 401 static void powermac_set_asic(struct pci_dev *pci_dev, int enable)
 402 {
 403         /* Enanble or disable ASIC clocks for USB */
 404         if (machine_is(powermac)) {
 405                 struct device_node      *of_node;
 406
 407                 of_node = pci_device_to_OF_node(pci_dev);
 408                 if (of_node)
 409                         pmac_call_feature(PMAC_FTR_USB_ENABLE,
 410                                         of_node, 0, enable);
 411         }
 412 }
 413
 414 #else
 415
 416 static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable)
 417 {}
 418
 419 #endif  /* CONFIG_PPC_PMAC */
 420
 421 static int check_root_hub_suspended(struct device *dev)
 422 {
 423         struct pci_dev          *pci_dev = to_pci_dev(dev);
 424         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 425
 426         if (HCD_RH_RUNNING(hcd)) {
 427                 dev_warn(dev, "Root hub is not suspended\n");
 428                 return -EBUSY;
 429         }
 430         if (hcd->shared_hcd) {
 431                 hcd = hcd->shared_hcd;
 432                 if (HCD_RH_RUNNING(hcd)) {
 433                         dev_warn(dev, "Secondary root hub is not suspended\n");
 434                         return -EBUSY;
 435                 }
 436         }
 437         return 0;
 438 }
 439
 440 static int suspend_common(struct device *dev, bool do_wakeup)
 441 {
 442         struct pci_dev          *pci_dev = to_pci_dev(dev);
 443         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 444         int                     retval;
 445
 446         /* Root hub suspend should have stopped all downstream traffic,
 447          * and all bus master traffic.  And done so for both the interface
 448          * and the stub usb_device (which we check here).  But maybe it
 449          * didn't; writing sysfs power/state files ignores such rules...
 450          */
 451         retval = check_root_hub_suspended(dev);
 452         if (retval)
 453                 return retval;
 454
 455         if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) {
 456                 /* Optimization: Don't suspend if a root-hub wakeup is
 457                  * pending and it would cause the HCD to wake up anyway.
 458                  */
 459                 if (do_wakeup && HCD_WAKEUP_PENDING(hcd))
 460                         return -EBUSY;
 461                 if (do_wakeup && hcd->shared_hcd &&
 462                                 HCD_WAKEUP_PENDING(hcd->shared_hcd))
 463                         return -EBUSY;
 464                 retval = hcd->driver->pci_suspend(hcd, do_wakeup);
 465                 suspend_report_result(hcd->driver->pci_suspend, retval);
 466
 467                 /* Check again in case wakeup raced with pci_suspend */
 468                 if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) ||
 469                                 (retval == 0 && do_wakeup && hcd->shared_hcd &&
 470                                  HCD_WAKEUP_PENDING(hcd->shared_hcd))) {
 471                         if (hcd->driver->pci_resume)
 472                                 hcd->driver->pci_resume(hcd, false);
 473                         retval = -EBUSY;
 474                 }
 475                 if (retval)
 476                         return retval;
 477         }
 478
 479         /* If MSI-X is enabled, the driver will have synchronized all vectors
 480          * in pci_suspend(). If MSI or legacy PCI is enabled, that will be
 481          * synchronized here.
 482          */
 483         if (!hcd->msix_enabled)
 484                 synchronize_irq(pci_dev->irq);
 485
 486         /* Downstream ports from this root hub should already be quiesced, so
 487          * there will be no DMA activity.  Now we can shut down the upstream
 488          * link (except maybe for PME# resume signaling).  We'll enter a
 489          * low power state during suspend_noirq, if the hardware allows.
 490          */
 491         pci_disable_device(pci_dev);
 492         return retval;
 493 }
 494
 495 static int resume_common(struct device *dev, int event)
 496 {
 497         struct pci_dev          *pci_dev = to_pci_dev(dev);
 498         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 499         int                     retval;
 500
 501         if (HCD_RH_RUNNING(hcd) ||
 502                         (hcd->shared_hcd &&
 503                          HCD_RH_RUNNING(hcd->shared_hcd))) {
 504                 dev_dbg(dev, "can't resume, not suspended!\n");
 505                 return 0;
 506         }
 507
 508         retval = pci_enable_device(pci_dev);
 509         if (retval < 0) {
 510                 dev_err(dev, "can't re-enable after resume, %d!\n", retval);
 511                 return retval;
 512         }
 513
 514         pci_set_master(pci_dev);
 515
 516         if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {
 517
 518                 /*
 519                  * Only EHCI controllers have to wait for their companions.
 520                  * No locking is needed because PCI controller drivers do not
 521                  * get unbound during system resume.
 522                  */
 523                 if (pci_dev->class == CL_EHCI && event != PM_EVENT_AUTO_RESUME)
 524                         for_each_companion(pci_dev, hcd,
 525                                         ehci_wait_for_companions);
 526
 527                 retval = hcd->driver->pci_resume(hcd,
 528                                 event == PM_EVENT_RESTORE);
 529                 if (retval) {
 530                         dev_err(dev, "PCI post-resume error %d!\n", retval);
 531                         if (hcd->shared_hcd)
 532                                 usb_hc_died(hcd->shared_hcd);
 533                         usb_hc_died(hcd);
 534                 }
 535         }
 536         return retval;
 537 }
 538
 539 #ifdef  CONFIG_PM_SLEEP
 540
 541 static int hcd_pci_suspend(struct device *dev)
 542 {
 543         return suspend_common(dev, device_may_wakeup(dev));
 544 }
 545
 546 static int hcd_pci_suspend_noirq(struct device *dev)
 547 {
 548         struct pci_dev          *pci_dev = to_pci_dev(dev);
 549         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 550         int                     retval;
 551
 552         retval = check_root_hub_suspended(dev);
 553         if (retval)
 554                 return retval;
 555
 556         pci_save_state(pci_dev);
 557
 558         /* If the root hub is dead rather than suspended, disallow remote
 559          * wakeup.  usb_hc_died() should ensure that both hosts are marked as
 560          * dying, so we only need to check the primary roothub.
 561          */
 562         if (HCD_DEAD(hcd))
 563                 device_set_wakeup_enable(dev, 0);
 564         dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
 565
 566         /* Possibly enable remote wakeup,
 567          * choose the appropriate low-power state, and go to that state.
 568          */
 569         retval = pci_prepare_to_sleep(pci_dev);
 570         if (retval == -EIO) {           /* Low-power not supported */
 571                 dev_dbg(dev, "--> PCI D0 legacy\n");
 572                 retval = 0;
 573         } else if (retval == 0) {
 574                 dev_dbg(dev, "--> PCI %s\n",
 575                                 pci_power_name(pci_dev->current_state));
 576         } else {
 577                 suspend_report_result(pci_prepare_to_sleep, retval);
 578                 return retval;
 579         }
 580
 581         powermac_set_asic(pci_dev, 0);
 582         return retval;
 583 }
 584
 585 static int hcd_pci_resume_noirq(struct device *dev)
 586 {
 587         struct pci_dev          *pci_dev = to_pci_dev(dev);
 588
 589         powermac_set_asic(pci_dev, 1);
 590
 591         /* Go back to D0 and disable remote wakeup */
 592         pci_back_from_sleep(pci_dev);
 593         return 0;
 594 }
 595
 596 static int hcd_pci_resume(struct device *dev)
 597 {
 598         return resume_common(dev, PM_EVENT_RESUME);
 599 }
 600
 601 static int hcd_pci_restore(struct device *dev)
 602 {
 603         return resume_common(dev, PM_EVENT_RESTORE);
 604 }
 605
 606 #else
 607
 608 #define hcd_pci_suspend         NULL
 609 #define hcd_pci_suspend_noirq   NULL
 610 #define hcd_pci_resume_noirq    NULL
 611 #define hcd_pci_resume          NULL
 612 #define hcd_pci_restore         NULL
 613
 614 #endif  /* CONFIG_PM_SLEEP */
 615
 616 static int hcd_pci_runtime_suspend(struct device *dev)
 617 {
 618         int     retval;
 619
 620         retval = suspend_common(dev, true);
 621         if (retval == 0)
 622                 powermac_set_asic(to_pci_dev(dev), 0);
 623         dev_dbg(dev, "hcd_pci_runtime_suspend: %d\n", retval);
 624         return retval;
 625 }
 626
 627 static int hcd_pci_runtime_resume(struct device *dev)
 628 {
 629         int     retval;
 630
 631         powermac_set_asic(to_pci_dev(dev), 1);
 632         retval = resume_common(dev, PM_EVENT_AUTO_RESUME);
 633         dev_dbg(dev, "hcd_pci_runtime_resume: %d\n", retval);
 634         return retval;
 635 }
 636
 637 const struct dev_pm_ops usb_hcd_pci_pm_ops = {
 638         .suspend        = hcd_pci_suspend,
 639         .suspend_noirq  = hcd_pci_suspend_noirq,
 640         .resume_noirq   = hcd_pci_resume_noirq,
 641         .resume         = hcd_pci_resume,
 642         .freeze         = check_root_hub_suspended,
 643         .freeze_noirq   = check_root_hub_suspended,
 644         .thaw_noirq     = NULL,
 645         .thaw           = NULL,
 646         .poweroff       = hcd_pci_suspend,
 647         .poweroff_noirq = hcd_pci_suspend_noirq,
 648         .restore_noirq  = hcd_pci_resume_noirq,
 649         .restore        = hcd_pci_restore,
 650         .runtime_suspend = hcd_pci_runtime_suspend,
 651         .runtime_resume = hcd_pci_runtime_resume,
 652 };
 653 EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
 654
 655 #endif  /* CONFIG_PM */