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/pci-bridge.h>
  32 #include <asm/prom.h>
  33 #endif
  34
  35 #include "usb.h"
  36
  37
  38 /* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
  39
  40 /*
  41  * Coordinate handoffs between EHCI and companion controllers
  42  * during EHCI probing and system resume.
  43  */
  44
  45 static DECLARE_RWSEM(companions_rwsem);
  46
  47 #define CL_UHCI         PCI_CLASS_SERIAL_USB_UHCI
  48 #define CL_OHCI         PCI_CLASS_SERIAL_USB_OHCI
  49 #define CL_EHCI         PCI_CLASS_SERIAL_USB_EHCI
  50
  51 static inline int is_ohci_or_uhci(struct pci_dev *pdev)
  52 {
  53         return pdev->class == CL_OHCI || pdev->class == CL_UHCI;
  54 }
  55
  56 typedef void (*companion_fn)(struct pci_dev *pdev, struct usb_hcd *hcd,
  57                 struct pci_dev *companion, struct usb_hcd *companion_hcd);
  58
  59 /* Iterate over PCI devices in the same slot as pdev and call fn for each */
  60 static void for_each_companion(struct pci_dev *pdev, struct usb_hcd *hcd,
  61                 companion_fn fn)
  62 {
  63         struct pci_dev          *companion;
  64         struct usb_hcd          *companion_hcd;
  65         unsigned int            slot = PCI_SLOT(pdev->devfn);
  66
  67         /*
  68          * Iterate through other PCI functions in the same slot.
  69          * If the function's drvdata isn't set then it isn't bound to
  70          * a USB host controller driver, so skip it.
  71          */
  72         companion = NULL;
  73         for_each_pci_dev(companion) {
  74                 if (companion->bus != pdev->bus ||
  75                                 PCI_SLOT(companion->devfn) != slot)
  76                         continue;
  77                 companion_hcd = pci_get_drvdata(companion);
  78                 if (!companion_hcd)
  79                         continue;
  80                 fn(pdev, hcd, companion, companion_hcd);
  81         }
  82 }
  83
  84 /*
  85  * We're about to add an EHCI controller, which will unceremoniously grab
  86  * all the port connections away from its companions.  To prevent annoying
  87  * error messages, lock the companion's root hub and gracefully unconfigure
  88  * it beforehand.  Leave it locked until the EHCI controller is all set.
  89  */
  90 static void ehci_pre_add(struct pci_dev *pdev, struct usb_hcd *hcd,
  91                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
  92 {
  93         struct usb_device *udev;
  94
  95         if (is_ohci_or_uhci(companion)) {
  96                 udev = companion_hcd->self.root_hub;
  97                 usb_lock_device(udev);
  98                 usb_set_configuration(udev, 0);
  99         }
 100 }
 101
 102 /*
 103  * Adding the EHCI controller has either succeeded or failed.  Set the
 104  * companion pointer accordingly, and in either case, reconfigure and
 105  * unlock the root hub.
 106  */
 107 static void ehci_post_add(struct pci_dev *pdev, struct usb_hcd *hcd,
 108                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 109 {
 110         struct usb_device *udev;
 111
 112         if (is_ohci_or_uhci(companion)) {
 113                 if (dev_get_drvdata(&pdev->dev)) {      /* Succeeded */
 114                         dev_dbg(&pdev->dev, "HS companion for %s\n",
 115                                         dev_name(&companion->dev));
 116                         companion_hcd->self.hs_companion = &hcd->self;
 117                 }
 118                 udev = companion_hcd->self.root_hub;
 119                 usb_set_configuration(udev, 1);
 120                 usb_unlock_device(udev);
 121         }
 122 }
 123
 124 /*
 125  * We just added a non-EHCI controller.  Find the EHCI controller to
 126  * which it is a companion, and store a pointer to the bus structure.
 127  */
 128 static void non_ehci_add(struct pci_dev *pdev, struct usb_hcd *hcd,
 129                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 130 {
 131         if (is_ohci_or_uhci(pdev) && companion->class == CL_EHCI) {
 132                 dev_dbg(&pdev->dev, "FS/LS companion for %s\n",
 133                                 dev_name(&companion->dev));
 134                 hcd->self.hs_companion = &companion_hcd->self;
 135         }
 136 }
 137
 138 /* We are removing an EHCI controller.  Clear the companions' pointers. */
 139 static void ehci_remove(struct pci_dev *pdev, struct usb_hcd *hcd,
 140                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 141 {
 142         if (is_ohci_or_uhci(companion))
 143                 companion_hcd->self.hs_companion = NULL;
 144 }
 145
 146 #ifdef  CONFIG_PM
 147
 148 /* An EHCI controller must wait for its companions before resuming. */
 149 static void ehci_wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd,
 150                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 151 {
 152         if (is_ohci_or_uhci(companion))
 153                 device_pm_wait_for_dev(&pdev->dev, &companion->dev);
 154 }
 155
 156 #endif  /* CONFIG_PM */
 157
 158 /*-------------------------------------------------------------------------*/
 159
 160 /* configure so an HC device and id are always provided */
 161 /* always called with process context; sleeping is OK */
 162
 163 /**
 164  * usb_hcd_pci_probe - initialize PCI-based HCDs
 165  * @dev: USB Host Controller being probed
 166  * @id: pci hotplug id connecting controller to HCD framework
 167  * Context: !in_interrupt()
 168  *
 169  * Allocates basic PCI resources for this USB host controller, and
 170  * then invokes the start() method for the HCD associated with it
 171  * through the hotplug entry's driver_data.
 172  *
 173  * Store this function in the HCD's struct pci_driver as probe().
 174  *
 175  * Return: 0 if successful.
 176  */
 177 int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 178 {
 179         struct hc_driver        *driver;
 180         struct usb_hcd          *hcd;
 181         int                     retval;
 182         int                     hcd_irq = 0;
 183
 184         if (usb_disabled())
 185                 return -ENODEV;
 186
 187         if (!id)
 188                 return -EINVAL;
 189         driver = (struct hc_driver *)id->driver_data;
 190         if (!driver)
 191                 return -EINVAL;
 192
 193         if (pci_enable_device(dev) < 0)
 194                 return -ENODEV;
 195         dev->current_state = PCI_D0;
 196
 197         /*
 198          * The xHCI driver has its own irq management
 199          * make sure irq setup is not touched for xhci in generic hcd code
 200          */
 201         if ((driver->flags & HCD_MASK) != HCD_USB3) {
 202                 if (!dev->irq) {
 203                         dev_err(&dev->dev,
 204                         "Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
 205                                 pci_name(dev));
 206                         retval = -ENODEV;
 207                         goto disable_pci;
 208                 }
 209                 hcd_irq = dev->irq;
 210         }
 211
 212         hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
 213         if (!hcd) {
 214                 retval = -ENOMEM;
 215                 goto disable_pci;
 216         }
 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 (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 223                                 driver->description)) {
 224                         dev_dbg(&dev->dev, "controller already in use\n");
 225                         retval = -EBUSY;
 226                         goto put_hcd;
 227                 }
 228                 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 229                 if (hcd->regs == NULL) {
 230                         dev_dbg(&dev->dev, "error mapping memory\n");
 231                         retval = -EFAULT;
 232                         goto release_mem_region;
 233                 }
 234
 235         } else {
 236                 /* UHCI */
 237                 int     region;
 238
 239                 for (region = 0; region < PCI_ROM_RESOURCE; region++) {
 240                         if (!(pci_resource_flags(dev, region) &
 241                                         IORESOURCE_IO))
 242                                 continue;
 243
 244                         hcd->rsrc_start = pci_resource_start(dev, region);
 245                         hcd->rsrc_len = pci_resource_len(dev, region);
 246                         if (request_region(hcd->rsrc_start, hcd->rsrc_len,
 247                                         driver->description))
 248                                 break;
 249                 }
 250                 if (region == PCI_ROM_RESOURCE) {
 251                         dev_dbg(&dev->dev, "no i/o regions available\n");
 252                         retval = -EBUSY;
 253                         goto put_hcd;
 254                 }
 255         }
 256
 257         pci_set_master(dev);
 258
 259         /* Note: dev_set_drvdata must be called while holding the rwsem */
 260         if (dev->class == CL_EHCI) {
 261                 down_write(&companions_rwsem);
 262                 dev_set_drvdata(&dev->dev, hcd);
 263                 for_each_companion(dev, hcd, ehci_pre_add);
 264                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 265                 if (retval != 0)
 266                         dev_set_drvdata(&dev->dev, NULL);
 267                 for_each_companion(dev, hcd, ehci_post_add);
 268                 up_write(&companions_rwsem);
 269         } else {
 270                 down_read(&companions_rwsem);
 271                 dev_set_drvdata(&dev->dev, hcd);
 272                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 273                 if (retval != 0)
 274                         dev_set_drvdata(&dev->dev, NULL);
 275                 else
 276                         for_each_companion(dev, hcd, non_ehci_add);
 277                 up_read(&companions_rwsem);
 278         }
 279
 280         if (retval != 0)
 281                 goto unmap_registers;
 282
 283         if (pci_dev_run_wake(dev))
 284                 pm_runtime_put_noidle(&dev->dev);
 285         return retval;
 286
 287 unmap_registers:
 288         if (driver->flags & HCD_MEMORY) {
 289                 iounmap(hcd->regs);
 290 release_mem_region:
 291                 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 292         } else
 293                 release_region(hcd->rsrc_start, hcd->rsrc_len);
 294 put_hcd:
 295         usb_put_hcd(hcd);
 296 disable_pci:
 297         pci_disable_device(dev);
 298         dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
 299         return retval;
 300 }
 301 EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
 302
 303
 304 /* may be called without controller electrically present */
 305 /* may be called with controller, bus, and devices active */
 306
 307 /**
 308  * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
 309  * @dev: USB Host Controller being removed
 310  * Context: !in_interrupt()
 311  *
 312  * Reverses the effect of usb_hcd_pci_probe(), first invoking
 313  * the HCD's stop() method.  It is always called from a thread
 314  * context, normally "rmmod", "apmd", or something similar.
 315  *
 316  * Store this function in the HCD's struct pci_driver as remove().
 317  */
 318 void usb_hcd_pci_remove(struct pci_dev *dev)
 319 {
 320         struct usb_hcd          *hcd;
 321
 322         hcd = pci_get_drvdata(dev);
 323         if (!hcd)
 324                 return;
 325
 326         if (pci_dev_run_wake(dev))
 327                 pm_runtime_get_noresume(&dev->dev);
 328
 329         /* Fake an interrupt request in order to give the driver a chance
 330          * to test whether the controller hardware has been removed (e.g.,
 331          * cardbus physical eject).
 332          */
 333         local_irq_disable();
 334         usb_hcd_irq(0, hcd);
 335         local_irq_enable();
 336
 337         /* Note: dev_set_drvdata must be called while holding the rwsem */
 338         if (dev->class == CL_EHCI) {
 339                 down_write(&companions_rwsem);
 340                 for_each_companion(dev, hcd, ehci_remove);
 341                 usb_remove_hcd(hcd);
 342                 dev_set_drvdata(&dev->dev, NULL);
 343                 up_write(&companions_rwsem);
 344         } else {
 345                 /* Not EHCI; just clear the companion pointer */
 346                 down_read(&companions_rwsem);
 347                 hcd->self.hs_companion = NULL;
 348                 usb_remove_hcd(hcd);
 349                 dev_set_drvdata(&dev->dev, NULL);
 350                 up_read(&companions_rwsem);
 351         }
 352
 353         if (hcd->driver->flags & HCD_MEMORY) {
 354                 iounmap(hcd->regs);
 355                 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 356         } else {
 357                 release_region(hcd->rsrc_start, hcd->rsrc_len);
 358         }
 359
 360         usb_put_hcd(hcd);
 361         pci_disable_device(dev);
 362 }
 363 EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
 364
 365 /**
 366  * usb_hcd_pci_shutdown - shutdown host controller
 367  * @dev: USB Host Controller being shutdown
 368  */
 369 void usb_hcd_pci_shutdown(struct pci_dev *dev)
 370 {
 371         struct usb_hcd          *hcd;
 372
 373         hcd = pci_get_drvdata(dev);
 374         if (!hcd)
 375                 return;
 376
 377         if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&
 378                         hcd->driver->shutdown) {
 379                 hcd->driver->shutdown(hcd);
 380                 pci_disable_device(dev);
 381         }
 382 }
 383 EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
 384
 385 #ifdef  CONFIG_PM
 386
 387 #ifdef  CONFIG_PPC_PMAC
 388 static void powermac_set_asic(struct pci_dev *pci_dev, int enable)
 389 {
 390         /* Enanble or disable ASIC clocks for USB */
 391         if (machine_is(powermac)) {
 392                 struct device_node      *of_node;
 393
 394                 of_node = pci_device_to_OF_node(pci_dev);
 395                 if (of_node)
 396                         pmac_call_feature(PMAC_FTR_USB_ENABLE,
 397                                         of_node, 0, enable);
 398         }
 399 }
 400
 401 #else
 402
 403 static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable)
 404 {}
 405
 406 #endif  /* CONFIG_PPC_PMAC */
 407
 408 static int check_root_hub_suspended(struct device *dev)
 409 {
 410         struct pci_dev          *pci_dev = to_pci_dev(dev);
 411         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 412
 413         if (HCD_RH_RUNNING(hcd)) {
 414                 dev_warn(dev, "Root hub is not suspended\n");
 415                 return -EBUSY;
 416         }
 417         if (hcd->shared_hcd) {
 418                 hcd = hcd->shared_hcd;
 419                 if (HCD_RH_RUNNING(hcd)) {
 420                         dev_warn(dev, "Secondary root hub is not suspended\n");
 421                         return -EBUSY;
 422                 }
 423         }
 424         return 0;
 425 }
 426
 427 #if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM_RUNTIME)
 428 static int suspend_common(struct device *dev, bool do_wakeup)
 429 {
 430         struct pci_dev          *pci_dev = to_pci_dev(dev);
 431         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 432         int                     retval;
 433
 434         /* Root hub suspend should have stopped all downstream traffic,
 435          * and all bus master traffic.  And done so for both the interface
 436          * and the stub usb_device (which we check here).  But maybe it
 437          * didn't; writing sysfs power/state files ignores such rules...
 438          */
 439         retval = check_root_hub_suspended(dev);
 440         if (retval)
 441                 return retval;
 442
 443         if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) {
 444                 /* Optimization: Don't suspend if a root-hub wakeup is
 445                  * pending and it would cause the HCD to wake up anyway.
 446                  */
 447                 if (do_wakeup && HCD_WAKEUP_PENDING(hcd))
 448                         return -EBUSY;
 449                 if (do_wakeup && hcd->shared_hcd &&
 450                                 HCD_WAKEUP_PENDING(hcd->shared_hcd))
 451                         return -EBUSY;
 452                 retval = hcd->driver->pci_suspend(hcd, do_wakeup);
 453                 suspend_report_result(hcd->driver->pci_suspend, retval);
 454
 455                 /* Check again in case wakeup raced with pci_suspend */
 456                 if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) ||
 457                                 (retval == 0 && do_wakeup && hcd->shared_hcd &&
 458                                  HCD_WAKEUP_PENDING(hcd->shared_hcd))) {
 459                         if (hcd->driver->pci_resume)
 460                                 hcd->driver->pci_resume(hcd, false);
 461                         retval = -EBUSY;
 462                 }
 463                 if (retval)
 464                         return retval;
 465         }
 466
 467         /* If MSI-X is enabled, the driver will have synchronized all vectors
 468          * in pci_suspend(). If MSI or legacy PCI is enabled, that will be
 469          * synchronized here.
 470          */
 471         if (!hcd->msix_enabled)
 472                 synchronize_irq(pci_dev->irq);
 473
 474         /* Downstream ports from this root hub should already be quiesced, so
 475          * there will be no DMA activity.  Now we can shut down the upstream
 476          * link (except maybe for PME# resume signaling).  We'll enter a
 477          * low power state during suspend_noirq, if the hardware allows.
 478          */
 479         pci_disable_device(pci_dev);
 480         return retval;
 481 }
 482
 483 static int resume_common(struct device *dev, int event)
 484 {
 485         struct pci_dev          *pci_dev = to_pci_dev(dev);
 486         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 487         int                     retval;
 488
 489         if (HCD_RH_RUNNING(hcd) ||
 490                         (hcd->shared_hcd &&
 491                          HCD_RH_RUNNING(hcd->shared_hcd))) {
 492                 dev_dbg(dev, "can't resume, not suspended!\n");
 493                 return 0;
 494         }
 495
 496         retval = pci_enable_device(pci_dev);
 497         if (retval < 0) {
 498                 dev_err(dev, "can't re-enable after resume, %d!\n", retval);
 499                 return retval;
 500         }
 501
 502         pci_set_master(pci_dev);
 503
 504         if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {
 505
 506                 /*
 507                  * Only EHCI controllers have to wait for their companions.
 508                  * No locking is needed because PCI controller drivers do not
 509                  * get unbound during system resume.
 510                  */
 511                 if (pci_dev->class == CL_EHCI && event != PM_EVENT_AUTO_RESUME)
 512                         for_each_companion(pci_dev, hcd,
 513                                         ehci_wait_for_companions);
 514
 515                 retval = hcd->driver->pci_resume(hcd,
 516                                 event == PM_EVENT_RESTORE);
 517                 if (retval) {
 518                         dev_err(dev, "PCI post-resume error %d!\n", retval);
 519                         if (hcd->shared_hcd)
 520                                 usb_hc_died(hcd->shared_hcd);
 521                         usb_hc_died(hcd);
 522                 }
 523         }
 524         return retval;
 525 }
 526 #endif  /* SLEEP || RUNTIME */
 527
 528 #ifdef  CONFIG_PM_SLEEP
 529
 530 static int hcd_pci_suspend(struct device *dev)
 531 {
 532         return suspend_common(dev, device_may_wakeup(dev));
 533 }
 534
 535 static int hcd_pci_suspend_noirq(struct device *dev)
 536 {
 537         struct pci_dev          *pci_dev = to_pci_dev(dev);
 538         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 539         int                     retval;
 540
 541         retval = check_root_hub_suspended(dev);
 542         if (retval)
 543                 return retval;
 544
 545         pci_save_state(pci_dev);
 546
 547         /* If the root hub is dead rather than suspended, disallow remote
 548          * wakeup.  usb_hc_died() should ensure that both hosts are marked as
 549          * dying, so we only need to check the primary roothub.
 550          */
 551         if (HCD_DEAD(hcd))
 552                 device_set_wakeup_enable(dev, 0);
 553         dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
 554
 555         /* Possibly enable remote wakeup,
 556          * choose the appropriate low-power state, and go to that state.
 557          */
 558         retval = pci_prepare_to_sleep(pci_dev);
 559         if (retval == -EIO) {           /* Low-power not supported */
 560                 dev_dbg(dev, "--> PCI D0 legacy\n");
 561                 retval = 0;
 562         } else if (retval == 0) {
 563                 dev_dbg(dev, "--> PCI %s\n",
 564                                 pci_power_name(pci_dev->current_state));
 565         } else {
 566                 suspend_report_result(pci_prepare_to_sleep, retval);
 567                 return retval;
 568         }
 569
 570         powermac_set_asic(pci_dev, 0);
 571         return retval;
 572 }
 573
 574 static int hcd_pci_resume_noirq(struct device *dev)
 575 {
 576         struct pci_dev          *pci_dev = to_pci_dev(dev);
 577
 578         powermac_set_asic(pci_dev, 1);
 579
 580         /* Go back to D0 and disable remote wakeup */
 581         pci_back_from_sleep(pci_dev);
 582         return 0;
 583 }
 584
 585 static int hcd_pci_resume(struct device *dev)
 586 {
 587         return resume_common(dev, PM_EVENT_RESUME);
 588 }
 589
 590 static int hcd_pci_restore(struct device *dev)
 591 {
 592         return resume_common(dev, PM_EVENT_RESTORE);
 593 }
 594
 595 #else
 596
 597 #define hcd_pci_suspend         NULL
 598 #define hcd_pci_suspend_noirq   NULL
 599 #define hcd_pci_resume_noirq    NULL
 600 #define hcd_pci_resume          NULL
 601 #define hcd_pci_restore         NULL
 602
 603 #endif  /* CONFIG_PM_SLEEP */
 604
 605 #ifdef  CONFIG_PM_RUNTIME
 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 #else
 629
 630 #define hcd_pci_runtime_suspend NULL
 631 #define hcd_pci_runtime_resume  NULL
 632
 633 #endif  /* CONFIG_PM_RUNTIME */
 634
 635 const struct dev_pm_ops usb_hcd_pci_pm_ops = {
 636         .suspend        = hcd_pci_suspend,
 637         .suspend_noirq  = hcd_pci_suspend_noirq,
 638         .resume_noirq   = hcd_pci_resume_noirq,
 639         .resume         = hcd_pci_resume,
 640         .freeze         = check_root_hub_suspended,
 641         .freeze_noirq   = check_root_hub_suspended,
 642         .thaw_noirq     = NULL,
 643         .thaw           = NULL,
 644         .poweroff       = hcd_pci_suspend,
 645         .poweroff_noirq = hcd_pci_suspend_noirq,
 646         .restore_noirq  = hcd_pci_resume_noirq,
 647         .restore        = hcd_pci_restore,
 648         .runtime_suspend = hcd_pci_runtime_suspend,
 649         .runtime_resume = hcd_pci_runtime_resume,
 650 };
 651 EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
 652
 653 #endif  /* CONFIG_PM */