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