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 || !companion_hcd->self.root_hub)
  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 int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 176 {
 177         struct hc_driver        *driver;
 178         struct usb_hcd          *hcd;
 179         int                     retval;
 180         int                     hcd_irq = 0;
 181
 182         if (usb_disabled())
 183                 return -ENODEV;
 184
 185         if (!id)
 186                 return -EINVAL;
 187         driver = (struct hc_driver *)id->driver_data;
 188         if (!driver)
 189                 return -EINVAL;
 190
 191         if (pci_enable_device(dev) < 0)
 192                 return -ENODEV;
 193         dev->current_state = PCI_D0;
 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         if (driver->flags & HCD_MEMORY) {
 217                 /* EHCI, OHCI */
 218                 hcd->rsrc_start = pci_resource_start(dev, 0);
 219                 hcd->rsrc_len = pci_resource_len(dev, 0);
 220                 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 221                                 driver->description)) {
 222                         dev_dbg(&dev->dev, "controller already in use\n");
 223                         retval = -EBUSY;
 224                         goto put_hcd;
 225                 }
 226                 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 227                 if (hcd->regs == NULL) {
 228                         dev_dbg(&dev->dev, "error mapping memory\n");
 229                         retval = -EFAULT;
 230                         goto release_mem_region;
 231                 }
 232
 233         } else {
 234                 /* UHCI */
 235                 int     region;
 236
 237                 for (region = 0; region < PCI_ROM_RESOURCE; region++) {
 238                         if (!(pci_resource_flags(dev, region) &
 239                                         IORESOURCE_IO))
 240                                 continue;
 241
 242                         hcd->rsrc_start = pci_resource_start(dev, region);
 243                         hcd->rsrc_len = pci_resource_len(dev, region);
 244                         if (request_region(hcd->rsrc_start, hcd->rsrc_len,
 245                                         driver->description))
 246                                 break;
 247                 }
 248                 if (region == PCI_ROM_RESOURCE) {
 249                         dev_dbg(&dev->dev, "no i/o regions available\n");
 250                         retval = -EBUSY;
 251                         goto put_hcd;
 252                 }
 253         }
 254
 255         pci_set_master(dev);
 256
 257         /* Note: dev_set_drvdata must be called while holding the rwsem */
 258         if (dev->class == CL_EHCI) {
 259                 down_write(&companions_rwsem);
 260                 dev_set_drvdata(&dev->dev, hcd);
 261                 for_each_companion(dev, hcd, ehci_pre_add);
 262                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 263                 if (retval != 0)
 264                         dev_set_drvdata(&dev->dev, NULL);
 265                 for_each_companion(dev, hcd, ehci_post_add);
 266                 up_write(&companions_rwsem);
 267         } else {
 268                 down_read(&companions_rwsem);
 269                 dev_set_drvdata(&dev->dev, hcd);
 270                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 271                 if (retval != 0)
 272                         dev_set_drvdata(&dev->dev, NULL);
 273                 else
 274                         for_each_companion(dev, hcd, non_ehci_add);
 275                 up_read(&companions_rwsem);
 276         }
 277
 278         if (retval != 0)
 279                 goto unmap_registers;
 280
 281         if (pci_dev_run_wake(dev))
 282                 pm_runtime_put_noidle(&dev->dev);
 283         return retval;
 284
 285 unmap_registers:
 286         if (driver->flags & HCD_MEMORY) {
 287                 iounmap(hcd->regs);
 288 release_mem_region:
 289                 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 290         } else
 291                 release_region(hcd->rsrc_start, hcd->rsrc_len);
 292 put_hcd:
 293         usb_put_hcd(hcd);
 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  * Context: !in_interrupt()
 309  *
 310  * Reverses the effect of usb_hcd_pci_probe(), first invoking
 311  * the HCD's stop() method.  It is always called from a thread
 312  * context, normally "rmmod", "apmd", or something similar.
 313  *
 314  * Store this function in the HCD's struct pci_driver as remove().
 315  */
 316 void usb_hcd_pci_remove(struct pci_dev *dev)
 317 {
 318         struct usb_hcd          *hcd;
 319
 320         hcd = pci_get_drvdata(dev);
 321         if (!hcd)
 322                 return;
 323
 324         if (pci_dev_run_wake(dev))
 325                 pm_runtime_get_noresume(&dev->dev);
 326
 327         /* Fake an interrupt request in order to give the driver a chance
 328          * to test whether the controller hardware has been removed (e.g.,
 329          * cardbus physical eject).
 330          */
 331         local_irq_disable();
 332         usb_hcd_irq(0, hcd);
 333         local_irq_enable();
 334
 335         /* Note: dev_set_drvdata must be called while holding the rwsem */
 336         if (dev->class == CL_EHCI) {
 337                 down_write(&companions_rwsem);
 338                 for_each_companion(dev, hcd, ehci_remove);
 339                 usb_remove_hcd(hcd);
 340                 dev_set_drvdata(&dev->dev, NULL);
 341                 up_write(&companions_rwsem);
 342         } else {
 343                 /* Not EHCI; just clear the companion pointer */
 344                 down_read(&companions_rwsem);
 345                 hcd->self.hs_companion = NULL;
 346                 usb_remove_hcd(hcd);
 347                 dev_set_drvdata(&dev->dev, NULL);
 348                 up_read(&companions_rwsem);
 349         }
 350
 351         if (hcd->driver->flags & HCD_MEMORY) {
 352                 iounmap(hcd->regs);
 353                 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 354         } else {
 355                 release_region(hcd->rsrc_start, hcd->rsrc_len);
 356         }
 357
 358         usb_put_hcd(hcd);
 359         pci_disable_device(dev);
 360 }
 361 EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
 362
 363 /**
 364  * usb_hcd_pci_shutdown - shutdown host controller
 365  * @dev: USB Host Controller being shutdown
 366  */
 367 void usb_hcd_pci_shutdown(struct pci_dev *dev)
 368 {
 369         struct usb_hcd          *hcd;
 370
 371         hcd = pci_get_drvdata(dev);
 372         if (!hcd)
 373                 return;
 374
 375         if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&
 376                         hcd->driver->shutdown) {
 377                 hcd->driver->shutdown(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 pci_dev          *pci_dev = to_pci_dev(dev);
 409         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 410
 411         if (HCD_RH_RUNNING(hcd)) {
 412                 dev_warn(dev, "Root hub is not suspended\n");
 413                 return -EBUSY;
 414         }
 415         if (hcd->shared_hcd) {
 416                 hcd = hcd->shared_hcd;
 417                 if (HCD_RH_RUNNING(hcd)) {
 418                         dev_warn(dev, "Secondary root hub is not suspended\n");
 419                         return -EBUSY;
 420                 }
 421         }
 422         return 0;
 423 }
 424
 425 #if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM_RUNTIME)
 426 static int suspend_common(struct device *dev, bool do_wakeup)
 427 {
 428         struct pci_dev          *pci_dev = to_pci_dev(dev);
 429         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 430         int                     retval;
 431
 432         /* Root hub suspend should have stopped all downstream traffic,
 433          * and all bus master traffic.  And done so for both the interface
 434          * and the stub usb_device (which we check here).  But maybe it
 435          * didn't; writing sysfs power/state files ignores such rules...
 436          */
 437         retval = check_root_hub_suspended(dev);
 438         if (retval)
 439                 return retval;
 440
 441         if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) {
 442                 /* Optimization: Don't suspend if a root-hub wakeup is
 443                  * pending and it would cause the HCD to wake up anyway.
 444                  */
 445                 if (do_wakeup && HCD_WAKEUP_PENDING(hcd))
 446                         return -EBUSY;
 447                 if (do_wakeup && hcd->shared_hcd &&
 448                                 HCD_WAKEUP_PENDING(hcd->shared_hcd))
 449                         return -EBUSY;
 450                 retval = hcd->driver->pci_suspend(hcd, do_wakeup);
 451                 suspend_report_result(hcd->driver->pci_suspend, retval);
 452
 453                 /* Check again in case wakeup raced with pci_suspend */
 454                 if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) ||
 455                                 (retval == 0 && do_wakeup && hcd->shared_hcd &&
 456                                  HCD_WAKEUP_PENDING(hcd->shared_hcd))) {
 457                         if (hcd->driver->pci_resume)
 458                                 hcd->driver->pci_resume(hcd, false);
 459                         retval = -EBUSY;
 460                 }
 461                 if (retval)
 462                         return retval;
 463         }
 464
 465         /* If MSI-X is enabled, the driver will have synchronized all vectors
 466          * in pci_suspend(). If MSI or legacy PCI is enabled, that will be
 467          * synchronized here.
 468          */
 469         if (!hcd->msix_enabled)
 470                 synchronize_irq(pci_dev->irq);
 471
 472         /* Downstream ports from this root hub should already be quiesced, so
 473          * there will be no DMA activity.  Now we can shut down the upstream
 474          * link (except maybe for PME# resume signaling).  We'll enter a
 475          * low power state during suspend_noirq, if the hardware allows.
 476          */
 477         pci_disable_device(pci_dev);
 478         return retval;
 479 }
 480
 481 static int resume_common(struct device *dev, int event)
 482 {
 483         struct pci_dev          *pci_dev = to_pci_dev(dev);
 484         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 485         int                     retval;
 486
 487         if (HCD_RH_RUNNING(hcd) ||
 488                         (hcd->shared_hcd &&
 489                          HCD_RH_RUNNING(hcd->shared_hcd))) {
 490                 dev_dbg(dev, "can't resume, not suspended!\n");
 491                 return 0;
 492         }
 493
 494         retval = pci_enable_device(pci_dev);
 495         if (retval < 0) {
 496                 dev_err(dev, "can't re-enable after resume, %d!\n", retval);
 497                 return retval;
 498         }
 499
 500         pci_set_master(pci_dev);
 501
 502         if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {
 503
 504                 /*
 505                  * Only EHCI controllers have to wait for their companions.
 506                  * No locking is needed because PCI controller drivers do not
 507                  * get unbound during system resume.
 508                  */
 509                 if (pci_dev->class == CL_EHCI && event != PM_EVENT_AUTO_RESUME)
 510                         for_each_companion(pci_dev, hcd,
 511                                         ehci_wait_for_companions);
 512
 513                 retval = hcd->driver->pci_resume(hcd,
 514                                 event == PM_EVENT_RESTORE);
 515                 if (retval) {
 516                         dev_err(dev, "PCI post-resume error %d!\n", retval);
 517                         if (hcd->shared_hcd)
 518                                 usb_hc_died(hcd->shared_hcd);
 519                         usb_hc_died(hcd);
 520                 }
 521         }
 522         return retval;
 523 }
 524 #endif  /* SLEEP || RUNTIME */
 525
 526 #ifdef  CONFIG_PM_SLEEP
 527
 528 static int hcd_pci_suspend(struct device *dev)
 529 {
 530         return suspend_common(dev, device_may_wakeup(dev));
 531 }
 532
 533 static int hcd_pci_suspend_noirq(struct device *dev)
 534 {
 535         struct pci_dev          *pci_dev = to_pci_dev(dev);
 536         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 537         int                     retval;
 538
 539         retval = check_root_hub_suspended(dev);
 540         if (retval)
 541                 return retval;
 542
 543         pci_save_state(pci_dev);
 544
 545         /* If the root hub is dead rather than suspended, disallow remote
 546          * wakeup.  usb_hc_died() should ensure that both hosts are marked as
 547          * dying, so we only need to check the primary roothub.
 548          */
 549         if (HCD_DEAD(hcd))
 550                 device_set_wakeup_enable(dev, 0);
 551         dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
 552
 553         /* Possibly enable remote wakeup,
 554          * choose the appropriate low-power state, and go to that state.
 555          */
 556         retval = pci_prepare_to_sleep(pci_dev);
 557         if (retval == -EIO) {           /* Low-power not supported */
 558                 dev_dbg(dev, "--> PCI D0 legacy\n");
 559                 retval = 0;
 560         } else if (retval == 0) {
 561                 dev_dbg(dev, "--> PCI %s\n",
 562                                 pci_power_name(pci_dev->current_state));
 563         } else {
 564                 suspend_report_result(pci_prepare_to_sleep, retval);
 565                 return retval;
 566         }
 567
 568         powermac_set_asic(pci_dev, 0);
 569         return retval;
 570 }
 571
 572 static int hcd_pci_resume_noirq(struct device *dev)
 573 {
 574         struct pci_dev          *pci_dev = to_pci_dev(dev);
 575
 576         powermac_set_asic(pci_dev, 1);
 577
 578         /* Go back to D0 and disable remote wakeup */
 579         pci_back_from_sleep(pci_dev);
 580         return 0;
 581 }
 582
 583 static int hcd_pci_resume(struct device *dev)
 584 {
 585         return resume_common(dev, PM_EVENT_RESUME);
 586 }
 587
 588 static int hcd_pci_restore(struct device *dev)
 589 {
 590         return resume_common(dev, PM_EVENT_RESTORE);
 591 }
 592
 593 #else
 594
 595 #define hcd_pci_suspend         NULL
 596 #define hcd_pci_suspend_noirq   NULL
 597 #define hcd_pci_resume_noirq    NULL
 598 #define hcd_pci_resume          NULL
 599 #define hcd_pci_restore         NULL
 600
 601 #endif  /* CONFIG_PM_SLEEP */
 602
 603 #ifdef  CONFIG_PM_RUNTIME
 604
 605 static int hcd_pci_runtime_suspend(struct device *dev)
 606 {
 607         int     retval;
 608
 609         retval = suspend_common(dev, true);
 610         if (retval == 0)
 611                 powermac_set_asic(to_pci_dev(dev), 0);
 612         dev_dbg(dev, "hcd_pci_runtime_suspend: %d\n", retval);
 613         return retval;
 614 }
 615
 616 static int hcd_pci_runtime_resume(struct device *dev)
 617 {
 618         int     retval;
 619
 620         powermac_set_asic(to_pci_dev(dev), 1);
 621         retval = resume_common(dev, PM_EVENT_AUTO_RESUME);
 622         dev_dbg(dev, "hcd_pci_runtime_resume: %d\n", retval);
 623         return retval;
 624 }
 625
 626 #else
 627
 628 #define hcd_pci_runtime_suspend NULL
 629 #define hcd_pci_runtime_resume  NULL
 630
 631 #endif  /* CONFIG_PM_RUNTIME */
 632
 633 const struct dev_pm_ops usb_hcd_pci_pm_ops = {
 634         .suspend        = hcd_pci_suspend,
 635         .suspend_noirq  = hcd_pci_suspend_noirq,
 636         .resume_noirq   = hcd_pci_resume_noirq,
 637         .resume         = hcd_pci_resume,
 638         .freeze         = check_root_hub_suspended,
 639         .freeze_noirq   = check_root_hub_suspended,
 640         .thaw_noirq     = NULL,
 641         .thaw           = NULL,
 642         .poweroff       = hcd_pci_suspend,
 643         .poweroff_noirq = hcd_pci_suspend_noirq,
 644         .restore_noirq  = hcd_pci_resume_noirq,
 645         .restore        = hcd_pci_restore,
 646         .runtime_suspend = hcd_pci_runtime_suspend,
 647         .runtime_resume = hcd_pci_runtime_resume,
 648 };
 649 EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
 650
 651 #endif  /* CONFIG_PM */