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