drivers/usb/core/hcd-pci.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright David Brownell 2000-2002
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/module.h>
   8 #include <linux/pci.h>
   9 #include <linux/usb.h>
  10 #include <linux/usb/hcd.h>
  11
  12 #include <asm/io.h>
  13 #include <asm/irq.h>
  14
  15 #ifdef CONFIG_PPC_PMAC
  16 #include <asm/machdep.h>
  17 #include <asm/pmac_feature.h>
  18 #endif
  19
  20 #include "usb.h"
  21
  22
  23 /* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
  24
  25 /*
  26  * Coordinate handoffs between EHCI and companion controllers
  27  * during EHCI probing and system resume.
  28  */
  29
  30 static DECLARE_RWSEM(companions_rwsem);
  31
  32 #define CL_UHCI         PCI_CLASS_SERIAL_USB_UHCI
  33 #define CL_OHCI         PCI_CLASS_SERIAL_USB_OHCI
  34 #define CL_EHCI         PCI_CLASS_SERIAL_USB_EHCI
  35
  36 static inline int is_ohci_or_uhci(struct pci_dev *pdev)
  37 {
  38         return pdev->class == CL_OHCI || pdev->class == CL_UHCI;
  39 }
  40
  41 typedef void (*companion_fn)(struct pci_dev *pdev, struct usb_hcd *hcd,
  42                 struct pci_dev *companion, struct usb_hcd *companion_hcd);
  43
  44 /* Iterate over PCI devices in the same slot as pdev and call fn for each */
  45 static void for_each_companion(struct pci_dev *pdev, struct usb_hcd *hcd,
  46                 companion_fn fn)
  47 {
  48         struct pci_dev          *companion;
  49         struct usb_hcd          *companion_hcd;
  50         unsigned int            slot = PCI_SLOT(pdev->devfn);
  51
  52         /*
  53          * Iterate through other PCI functions in the same slot.
  54          * If the function's drvdata isn't set then it isn't bound to
  55          * a USB host controller driver, so skip it.
  56          */
  57         companion = NULL;
  58         for_each_pci_dev(companion) {
  59                 if (companion->bus != pdev->bus ||
  60                                 PCI_SLOT(companion->devfn) != slot)
  61                         continue;
  62
  63                 /*
  64                  * Companion device should be either UHCI,OHCI or EHCI host
  65                  * controller, otherwise skip.
  66                  */
  67                 if (companion->class != CL_UHCI && companion->class != CL_OHCI &&
  68                                 companion->class != CL_EHCI)
  69                         continue;
  70
  71                 companion_hcd = pci_get_drvdata(companion);
  72                 if (!companion_hcd || !companion_hcd->self.root_hub)
  73                         continue;
  74                 fn(pdev, hcd, companion, companion_hcd);
  75         }
  76 }
  77
  78 /*
  79  * We're about to add an EHCI controller, which will unceremoniously grab
  80  * all the port connections away from its companions.  To prevent annoying
  81  * error messages, lock the companion's root hub and gracefully unconfigure
  82  * it beforehand.  Leave it locked until the EHCI controller is all set.
  83  */
  84 static void ehci_pre_add(struct pci_dev *pdev, struct usb_hcd *hcd,
  85                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
  86 {
  87         struct usb_device *udev;
  88
  89         if (is_ohci_or_uhci(companion)) {
  90                 udev = companion_hcd->self.root_hub;
  91                 usb_lock_device(udev);
  92                 usb_set_configuration(udev, 0);
  93         }
  94 }
  95
  96 /*
  97  * Adding the EHCI controller has either succeeded or failed.  Set the
  98  * companion pointer accordingly, and in either case, reconfigure and
  99  * unlock the root hub.
 100  */
 101 static void ehci_post_add(struct pci_dev *pdev, struct usb_hcd *hcd,
 102                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 103 {
 104         struct usb_device *udev;
 105
 106         if (is_ohci_or_uhci(companion)) {
 107                 if (dev_get_drvdata(&pdev->dev)) {      /* Succeeded */
 108                         dev_dbg(&pdev->dev, "HS companion for %s\n",
 109                                         dev_name(&companion->dev));
 110                         companion_hcd->self.hs_companion = &hcd->self;
 111                 }
 112                 udev = companion_hcd->self.root_hub;
 113                 usb_set_configuration(udev, 1);
 114                 usb_unlock_device(udev);
 115         }
 116 }
 117
 118 /*
 119  * We just added a non-EHCI controller.  Find the EHCI controller to
 120  * which it is a companion, and store a pointer to the bus structure.
 121  */
 122 static void non_ehci_add(struct pci_dev *pdev, struct usb_hcd *hcd,
 123                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 124 {
 125         if (is_ohci_or_uhci(pdev) && companion->class == CL_EHCI) {
 126                 dev_dbg(&pdev->dev, "FS/LS companion for %s\n",
 127                                 dev_name(&companion->dev));
 128                 hcd->self.hs_companion = &companion_hcd->self;
 129         }
 130 }
 131
 132 /* We are removing an EHCI controller.  Clear the companions' pointers. */
 133 static void ehci_remove(struct pci_dev *pdev, struct usb_hcd *hcd,
 134                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 135 {
 136         if (is_ohci_or_uhci(companion))
 137                 companion_hcd->self.hs_companion = NULL;
 138 }
 139
 140 #ifdef  CONFIG_PM
 141
 142 /* An EHCI controller must wait for its companions before resuming. */
 143 static void ehci_wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd,
 144                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 145 {
 146         if (is_ohci_or_uhci(companion))
 147                 device_pm_wait_for_dev(&pdev->dev, &companion->dev);
 148 }
 149
 150 #endif  /* CONFIG_PM */
 151
 152 /*-------------------------------------------------------------------------*/
 153
 154 /* configure so an HC device and id are always provided */
 155 /* always called with process context; sleeping is OK */
 156
 157 /**
 158  * usb_hcd_pci_probe - initialize PCI-based HCDs
 159  * @dev: USB Host Controller being probed
 160  * @driver: USB HC driver handle
 161  *
 162  * Context: task context, might sleep
 163  *
 164  * Allocates basic PCI resources for this USB host controller, and
 165  * then invokes the start() method for the HCD associated with it
 166  * through the hotplug entry's driver_data.
 167  *
 168  * Store this function in the HCD's struct pci_driver as probe().
 169  *
 170  * Return: 0 if successful.
 171  */
 172 int usb_hcd_pci_probe(struct pci_dev *dev, const struct hc_driver *driver)
 173 {
 174         struct usb_hcd          *hcd;
 175         int                     retval;
 176         int                     hcd_irq = 0;
 177
 178         if (usb_disabled())
 179                 return -ENODEV;
 180
 181         if (!driver)
 182                 return -EINVAL;
 183
 184         if (pci_enable_device(dev) < 0)
 185                 return -ENODEV;
 186
 187         /*
 188          * The xHCI driver has its own irq management
 189          * make sure irq setup is not touched for xhci in generic hcd code
 190          */
 191         if ((driver->flags & HCD_MASK) < HCD_USB3) {
 192                 retval = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_LEGACY | PCI_IRQ_MSI);
 193                 if (retval < 0) {
 194                         dev_err(&dev->dev,
 195                         "Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
 196                                 pci_name(dev));
 197                         retval = -ENODEV;
 198                         goto disable_pci;
 199                 }
 200                 hcd_irq = pci_irq_vector(dev, 0);
 201         }
 202
 203         hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
 204         if (!hcd) {
 205                 retval = -ENOMEM;
 206                 goto free_irq_vectors;
 207         }
 208
 209         hcd->amd_resume_bug = (usb_hcd_amd_remote_wakeup_quirk(dev) &&
 210                         driver->flags & (HCD_USB11 | HCD_USB3)) ? 1 : 0;
 211
 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 (!devm_request_mem_region(&dev->dev, hcd->rsrc_start,
 217                                 hcd->rsrc_len, driver->description)) {
 218                         dev_dbg(&dev->dev, "controller already in use\n");
 219                         retval = -EBUSY;
 220                         goto put_hcd;
 221                 }
 222                 hcd->regs = devm_ioremap(&dev->dev, hcd->rsrc_start,
 223                                 hcd->rsrc_len);
 224                 if (hcd->regs == NULL) {
 225                         dev_dbg(&dev->dev, "error mapping memory\n");
 226                         retval = -EFAULT;
 227                         goto put_hcd;
 228                 }
 229
 230         } else {
 231                 /* UHCI */
 232                 int     region;
 233
 234                 for (region = 0; region < PCI_STD_NUM_BARS; region++) {
 235                         if (!(pci_resource_flags(dev, region) &
 236                                         IORESOURCE_IO))
 237                                 continue;
 238
 239                         hcd->rsrc_start = pci_resource_start(dev, region);
 240                         hcd->rsrc_len = pci_resource_len(dev, region);
 241                         if (devm_request_region(&dev->dev, hcd->rsrc_start,
 242                                         hcd->rsrc_len, driver->description))
 243                                 break;
 244                 }
 245                 if (region == PCI_STD_NUM_BARS) {
 246                         dev_dbg(&dev->dev, "no i/o regions available\n");
 247                         retval = -EBUSY;
 248                         goto put_hcd;
 249                 }
 250         }
 251
 252         pci_set_master(dev);
 253
 254         /* Note: dev_set_drvdata must be called while holding the rwsem */
 255         if (dev->class == CL_EHCI) {
 256                 down_write(&companions_rwsem);
 257                 dev_set_drvdata(&dev->dev, hcd);
 258                 for_each_companion(dev, hcd, ehci_pre_add);
 259                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 260                 if (retval != 0)
 261                         dev_set_drvdata(&dev->dev, NULL);
 262                 for_each_companion(dev, hcd, ehci_post_add);
 263                 up_write(&companions_rwsem);
 264         } else {
 265                 down_read(&companions_rwsem);
 266                 dev_set_drvdata(&dev->dev, hcd);
 267                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 268                 if (retval != 0)
 269                         dev_set_drvdata(&dev->dev, NULL);
 270                 else
 271                         for_each_companion(dev, hcd, non_ehci_add);
 272                 up_read(&companions_rwsem);
 273         }
 274
 275         if (retval != 0)
 276                 goto put_hcd;
 277         device_wakeup_enable(hcd->self.controller);
 278
 279         if (pci_dev_run_wake(dev))
 280                 pm_runtime_put_noidle(&dev->dev);
 281         return retval;
 282
 283 put_hcd:
 284         usb_put_hcd(hcd);
 285 free_irq_vectors:
 286         if ((driver->flags & HCD_MASK) < HCD_USB3)
 287                 pci_free_irq_vectors(dev);
 288 disable_pci:
 289         pci_disable_device(dev);
 290         dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
 291         return retval;
 292 }
 293 EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
 294
 295
 296 /* may be called without controller electrically present */
 297 /* may be called with controller, bus, and devices active */
 298
 299 /**
 300  * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
 301  * @dev: USB Host Controller being removed
 302  *
 303  * Context: task context, might sleep
 304  *
 305  * Reverses the effect of usb_hcd_pci_probe(), first invoking
 306  * the HCD's stop() method.  It is always called from a thread
 307  * context, normally "rmmod", "apmd", or something similar.
 308  *
 309  * Store this function in the HCD's struct pci_driver as remove().
 310  */
 311 void usb_hcd_pci_remove(struct pci_dev *dev)
 312 {
 313         struct usb_hcd          *hcd;
 314         int                     hcd_driver_flags;
 315
 316         hcd = pci_get_drvdata(dev);
 317         if (!hcd)
 318                 return;
 319
 320         hcd_driver_flags = hcd->driver->flags;
 321
 322         if (pci_dev_run_wake(dev))
 323                 pm_runtime_get_noresume(&dev->dev);
 324
 325         /* Fake an interrupt request in order to give the driver a chance
 326          * to test whether the controller hardware has been removed (e.g.,
 327          * cardbus physical eject).
 328          */
 329         local_irq_disable();
 330         usb_hcd_irq(0, hcd);
 331         local_irq_enable();
 332
 333         /* Note: dev_set_drvdata must be called while holding the rwsem */
 334         if (dev->class == CL_EHCI) {
 335                 down_write(&companions_rwsem);
 336                 for_each_companion(dev, hcd, ehci_remove);
 337                 usb_remove_hcd(hcd);
 338                 dev_set_drvdata(&dev->dev, NULL);
 339                 up_write(&companions_rwsem);
 340         } else {
 341                 /* Not EHCI; just clear the companion pointer */
 342                 down_read(&companions_rwsem);
 343                 hcd->self.hs_companion = NULL;
 344                 usb_remove_hcd(hcd);
 345                 dev_set_drvdata(&dev->dev, NULL);
 346                 up_read(&companions_rwsem);
 347         }
 348         usb_put_hcd(hcd);
 349         if ((hcd_driver_flags & HCD_MASK) < HCD_USB3)
 350                 pci_free_irq_vectors(dev);
 351         pci_disable_device(dev);
 352 }
 353 EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
 354
 355 /**
 356  * usb_hcd_pci_shutdown - shutdown host controller
 357  * @dev: USB Host Controller being shutdown
 358  */
 359 void usb_hcd_pci_shutdown(struct pci_dev *dev)
 360 {
 361         struct usb_hcd          *hcd;
 362
 363         hcd = pci_get_drvdata(dev);
 364         if (!hcd)
 365                 return;
 366
 367         if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&
 368                         hcd->driver->shutdown) {
 369                 hcd->driver->shutdown(hcd);
 370                 if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0)
 371                         free_irq(hcd->irq, hcd);
 372                 pci_disable_device(dev);
 373         }
 374 }
 375 EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
 376
 377 #ifdef  CONFIG_PM
 378
 379 #ifdef  CONFIG_PPC_PMAC
 380 static void powermac_set_asic(struct pci_dev *pci_dev, int enable)
 381 {
 382         /* Enanble or disable ASIC clocks for USB */
 383         if (machine_is(powermac)) {
 384                 struct device_node      *of_node;
 385
 386                 of_node = pci_device_to_OF_node(pci_dev);
 387                 if (of_node)
 388                         pmac_call_feature(PMAC_FTR_USB_ENABLE,
 389                                         of_node, 0, enable);
 390         }
 391 }
 392
 393 #else
 394
 395 static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable)
 396 {}
 397
 398 #endif  /* CONFIG_PPC_PMAC */
 399
 400 static int check_root_hub_suspended(struct device *dev)
 401 {
 402         struct usb_hcd          *hcd = dev_get_drvdata(dev);
 403
 404         if (HCD_RH_RUNNING(hcd)) {
 405                 dev_warn(dev, "Root hub is not suspended\n");
 406                 return -EBUSY;
 407         }
 408         if (hcd->shared_hcd) {
 409                 hcd = hcd->shared_hcd;
 410                 if (HCD_RH_RUNNING(hcd)) {
 411                         dev_warn(dev, "Secondary root hub is not suspended\n");
 412                         return -EBUSY;
 413                 }
 414         }
 415         return 0;
 416 }
 417
 418 static int suspend_common(struct device *dev, pm_message_t msg)
 419 {
 420         struct pci_dev          *pci_dev = to_pci_dev(dev);
 421         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 422         bool                    do_wakeup;
 423         int                     retval;
 424
 425         do_wakeup = PMSG_IS_AUTO(msg) ? true : device_may_wakeup(dev);
 426
 427         /* Root hub suspend should have stopped all downstream traffic,
 428          * and all bus master traffic.  And done so for both the interface
 429          * and the stub usb_device (which we check here).  But maybe it
 430          * didn't; writing sysfs power/state files ignores such rules...
 431          */
 432         retval = check_root_hub_suspended(dev);
 433         if (retval)
 434                 return retval;
 435
 436         if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) {
 437                 /* Optimization: Don't suspend if a root-hub wakeup is
 438                  * pending and it would cause the HCD to wake up anyway.
 439                  */
 440                 if (do_wakeup && HCD_WAKEUP_PENDING(hcd))
 441                         return -EBUSY;
 442                 if (do_wakeup && hcd->shared_hcd &&
 443                                 HCD_WAKEUP_PENDING(hcd->shared_hcd))
 444                         return -EBUSY;
 445                 retval = hcd->driver->pci_suspend(hcd, do_wakeup);
 446                 suspend_report_result(dev, hcd->driver->pci_suspend, retval);
 447
 448                 /* Check again in case wakeup raced with pci_suspend */
 449                 if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) ||
 450                                 (retval == 0 && do_wakeup && hcd->shared_hcd &&
 451                                  HCD_WAKEUP_PENDING(hcd->shared_hcd))) {
 452                         if (hcd->driver->pci_resume)
 453                                 hcd->driver->pci_resume(hcd, msg);
 454                         retval = -EBUSY;
 455                 }
 456                 if (retval)
 457                         return retval;
 458         }
 459
 460         /* If MSI-X is enabled, the driver will have synchronized all vectors
 461          * in pci_suspend(). If MSI or legacy PCI is enabled, that will be
 462          * synchronized here.
 463          */
 464         if (!hcd->msix_enabled)
 465                 synchronize_irq(pci_irq_vector(pci_dev, 0));
 466
 467         /* Downstream ports from this root hub should already be quiesced, so
 468          * there will be no DMA activity.  Now we can shut down the upstream
 469          * link (except maybe for PME# resume signaling).  We'll enter a
 470          * low power state during suspend_noirq, if the hardware allows.
 471          */
 472         pci_disable_device(pci_dev);
 473         return retval;
 474 }
 475
 476 static int resume_common(struct device *dev, pm_message_t msg)
 477 {
 478         struct pci_dev          *pci_dev = to_pci_dev(dev);
 479         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 480         int                     retval;
 481
 482         if (HCD_RH_RUNNING(hcd) ||
 483                         (hcd->shared_hcd &&
 484                          HCD_RH_RUNNING(hcd->shared_hcd))) {
 485                 dev_dbg(dev, "can't resume, not suspended!\n");
 486                 return 0;
 487         }
 488
 489         retval = pci_enable_device(pci_dev);
 490         if (retval < 0) {
 491                 dev_err(dev, "can't re-enable after resume, %d!\n", retval);
 492                 return retval;
 493         }
 494
 495         pci_set_master(pci_dev);
 496
 497         if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {
 498
 499                 /*
 500                  * Only EHCI controllers have to wait for their companions.
 501                  * No locking is needed because PCI controller drivers do not
 502                  * get unbound during system resume.
 503                  */
 504                 if (pci_dev->class == CL_EHCI && msg.event != PM_EVENT_AUTO_RESUME)
 505                         for_each_companion(pci_dev, hcd,
 506                                         ehci_wait_for_companions);
 507
 508                 retval = hcd->driver->pci_resume(hcd, msg);
 509                 if (retval) {
 510                         dev_err(dev, "PCI post-resume error %d!\n", retval);
 511                         usb_hc_died(hcd);
 512                 }
 513         }
 514         return retval;
 515 }
 516
 517 #ifdef  CONFIG_PM_SLEEP
 518
 519 static int hcd_pci_suspend(struct device *dev)
 520 {
 521         return suspend_common(dev, PMSG_SUSPEND);
 522 }
 523
 524 static int hcd_pci_suspend_noirq(struct device *dev)
 525 {
 526         struct pci_dev          *pci_dev = to_pci_dev(dev);
 527         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 528         int                     retval;
 529
 530         retval = check_root_hub_suspended(dev);
 531         if (retval)
 532                 return retval;
 533
 534         pci_save_state(pci_dev);
 535
 536         /* If the root hub is dead rather than suspended, disallow remote
 537          * wakeup.  usb_hc_died() should ensure that both hosts are marked as
 538          * dying, so we only need to check the primary roothub.
 539          */
 540         if (HCD_DEAD(hcd))
 541                 device_set_wakeup_enable(dev, 0);
 542         dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
 543
 544         /* Possibly enable remote wakeup,
 545          * choose the appropriate low-power state, and go to that state.
 546          */
 547         retval = pci_prepare_to_sleep(pci_dev);
 548         if (retval == -EIO) {           /* Low-power not supported */
 549                 dev_dbg(dev, "--> PCI D0 legacy\n");
 550                 retval = 0;
 551         } else if (retval == 0) {
 552                 dev_dbg(dev, "--> PCI %s\n",
 553                                 pci_power_name(pci_dev->current_state));
 554         } else {
 555                 suspend_report_result(dev, pci_prepare_to_sleep, retval);
 556                 return retval;
 557         }
 558
 559         powermac_set_asic(pci_dev, 0);
 560         return retval;
 561 }
 562
 563 static int hcd_pci_poweroff_late(struct device *dev)
 564 {
 565         struct pci_dev          *pci_dev = to_pci_dev(dev);
 566         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 567
 568         if (hcd->driver->pci_poweroff_late && !HCD_DEAD(hcd))
 569                 return hcd->driver->pci_poweroff_late(hcd, device_may_wakeup(dev));
 570
 571         return 0;
 572 }
 573
 574 static int hcd_pci_resume_noirq(struct device *dev)
 575 {
 576         powermac_set_asic(to_pci_dev(dev), 1);
 577         return 0;
 578 }
 579
 580 static int hcd_pci_resume(struct device *dev)
 581 {
 582         return resume_common(dev, PMSG_RESUME);
 583 }
 584
 585 static int hcd_pci_restore(struct device *dev)
 586 {
 587         return resume_common(dev, PMSG_RESTORE);
 588 }
 589
 590 #else
 591
 592 #define hcd_pci_suspend         NULL
 593 #define hcd_pci_suspend_noirq   NULL
 594 #define hcd_pci_poweroff_late   NULL
 595 #define hcd_pci_resume_noirq    NULL
 596 #define hcd_pci_resume          NULL
 597 #define hcd_pci_restore         NULL
 598
 599 #endif  /* CONFIG_PM_SLEEP */
 600
 601 static int hcd_pci_runtime_suspend(struct device *dev)
 602 {
 603         int     retval;
 604
 605         retval = suspend_common(dev, PMSG_AUTO_SUSPEND);
 606         if (retval == 0)
 607                 powermac_set_asic(to_pci_dev(dev), 0);
 608         dev_dbg(dev, "hcd_pci_runtime_suspend: %d\n", retval);
 609         return retval;
 610 }
 611
 612 static int hcd_pci_runtime_resume(struct device *dev)
 613 {
 614         int     retval;
 615
 616         powermac_set_asic(to_pci_dev(dev), 1);
 617         retval = resume_common(dev, PMSG_AUTO_RESUME);
 618         dev_dbg(dev, "hcd_pci_runtime_resume: %d\n", retval);
 619         return retval;
 620 }
 621
 622 const struct dev_pm_ops usb_hcd_pci_pm_ops = {
 623         .suspend        = hcd_pci_suspend,
 624         .suspend_noirq  = hcd_pci_suspend_noirq,
 625         .resume_noirq   = hcd_pci_resume_noirq,
 626         .resume         = hcd_pci_resume,
 627         .freeze         = hcd_pci_suspend,
 628         .freeze_noirq   = check_root_hub_suspended,
 629         .thaw_noirq     = NULL,
 630         .thaw           = hcd_pci_resume,
 631         .poweroff       = hcd_pci_suspend,
 632         .poweroff_late  = hcd_pci_poweroff_late,
 633         .poweroff_noirq = hcd_pci_suspend_noirq,
 634         .restore_noirq  = hcd_pci_resume_noirq,
 635         .restore        = hcd_pci_restore,
 636         .runtime_suspend = hcd_pci_runtime_suspend,
 637         .runtime_resume = hcd_pci_runtime_resume,
 638 };
 639 EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
 640
 641 #endif  /* CONFIG_PM */