kernel/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
  78                 /*
  79                  * Companion device should be either UHCI,OHCI or EHCI host
  80                  * controller, otherwise skip.
  81                  */
  82                 if (companion->class != CL_UHCI && companion->class != CL_OHCI &&
  83                                 companion->class != CL_EHCI)
  84                         continue;
  85
  86                 companion_hcd = pci_get_drvdata(companion);
  87                 if (!companion_hcd || !companion_hcd->self.root_hub)
  88                         continue;
  89                 fn(pdev, hcd, companion, companion_hcd);
  90         }
  91 }
  92
  93 /*
  94  * We're about to add an EHCI controller, which will unceremoniously grab
  95  * all the port connections away from its companions.  To prevent annoying
  96  * error messages, lock the companion's root hub and gracefully unconfigure
  97  * it beforehand.  Leave it locked until the EHCI controller is all set.
  98  */
  99 static void ehci_pre_add(struct pci_dev *pdev, struct usb_hcd *hcd,
 100                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 101 {
 102         struct usb_device *udev;
 103
 104         if (is_ohci_or_uhci(companion)) {
 105                 udev = companion_hcd->self.root_hub;
 106                 usb_lock_device(udev);
 107                 usb_set_configuration(udev, 0);
 108         }
 109 }
 110
 111 /*
 112  * Adding the EHCI controller has either succeeded or failed.  Set the
 113  * companion pointer accordingly, and in either case, reconfigure and
 114  * unlock the root hub.
 115  */
 116 static void ehci_post_add(struct pci_dev *pdev, struct usb_hcd *hcd,
 117                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 118 {
 119         struct usb_device *udev;
 120
 121         if (is_ohci_or_uhci(companion)) {
 122                 if (dev_get_drvdata(&pdev->dev)) {      /* Succeeded */
 123                         dev_dbg(&pdev->dev, "HS companion for %s\n",
 124                                         dev_name(&companion->dev));
 125                         companion_hcd->self.hs_companion = &hcd->self;
 126                 }
 127                 udev = companion_hcd->self.root_hub;
 128                 usb_set_configuration(udev, 1);
 129                 usb_unlock_device(udev);
 130         }
 131 }
 132
 133 /*
 134  * We just added a non-EHCI controller.  Find the EHCI controller to
 135  * which it is a companion, and store a pointer to the bus structure.
 136  */
 137 static void non_ehci_add(struct pci_dev *pdev, struct usb_hcd *hcd,
 138                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 139 {
 140         if (is_ohci_or_uhci(pdev) && companion->class == CL_EHCI) {
 141                 dev_dbg(&pdev->dev, "FS/LS companion for %s\n",
 142                                 dev_name(&companion->dev));
 143                 hcd->self.hs_companion = &companion_hcd->self;
 144         }
 145 }
 146
 147 /* We are removing an EHCI controller.  Clear the companions' pointers. */
 148 static void ehci_remove(struct pci_dev *pdev, struct usb_hcd *hcd,
 149                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 150 {
 151         if (is_ohci_or_uhci(companion))
 152                 companion_hcd->self.hs_companion = NULL;
 153 }
 154
 155 #ifdef  CONFIG_PM
 156
 157 /* An EHCI controller must wait for its companions before resuming. */
 158 static void ehci_wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd,
 159                 struct pci_dev *companion, struct usb_hcd *companion_hcd)
 160 {
 161         if (is_ohci_or_uhci(companion))
 162                 device_pm_wait_for_dev(&pdev->dev, &companion->dev);
 163 }
 164
 165 #endif  /* CONFIG_PM */
 166
 167 /*-------------------------------------------------------------------------*/
 168
 169 /* configure so an HC device and id are always provided */
 170 /* always called with process context; sleeping is OK */
 171
 172 /**
 173  * usb_hcd_pci_probe - initialize PCI-based HCDs
 174  * @dev: USB Host Controller being probed
 175  * @id: pci hotplug id connecting controller to HCD framework
 176  * Context: !in_interrupt()
 177  *
 178  * Allocates basic PCI resources for this USB host controller, and
 179  * then invokes the start() method for the HCD associated with it
 180  * through the hotplug entry's driver_data.
 181  *
 182  * Store this function in the HCD's struct pci_driver as probe().
 183  *
 184  * Return: 0 if successful.
 185  */
 186 int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 187 {
 188         struct hc_driver        *driver;
 189         struct usb_hcd          *hcd;
 190         int                     retval;
 191         int                     hcd_irq = 0;
 192
 193         if (usb_disabled())
 194                 return -ENODEV;
 195
 196         if (!id)
 197                 return -EINVAL;
 198         driver = (struct hc_driver *)id->driver_data;
 199         if (!driver)
 200                 return -EINVAL;
 201
 202         if (pci_enable_device(dev) < 0)
 203                 return -ENODEV;
 204
 205         /*
 206          * The xHCI driver has its own irq management
 207          * make sure irq setup is not touched for xhci in generic hcd code
 208          */
 209         if ((driver->flags & HCD_MASK) < HCD_USB3) {
 210                 if (!dev->irq) {
 211                         dev_err(&dev->dev,
 212                         "Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
 213                                 pci_name(dev));
 214                         retval = -ENODEV;
 215                         goto disable_pci;
 216                 }
 217                 hcd_irq = dev->irq;
 218         }
 219
 220         hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
 221         if (!hcd) {
 222                 retval = -ENOMEM;
 223                 goto disable_pci;
 224         }
 225
 226         hcd->amd_resume_bug = (usb_hcd_amd_remote_wakeup_quirk(dev) &&
 227                         driver->flags & (HCD_USB11 | HCD_USB3)) ? 1 : 0;
 228
 229         if (driver->flags & HCD_MEMORY) {
 230                 /* EHCI, OHCI */
 231                 hcd->rsrc_start = pci_resource_start(dev, 0);
 232                 hcd->rsrc_len = pci_resource_len(dev, 0);
 233                 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 234                                 driver->description)) {
 235                         dev_dbg(&dev->dev, "controller already in use\n");
 236                         retval = -EBUSY;
 237                         goto put_hcd;
 238                 }
 239                 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 240                 if (hcd->regs == NULL) {
 241                         dev_dbg(&dev->dev, "error mapping memory\n");
 242                         retval = -EFAULT;
 243                         goto release_mem_region;
 244                 }
 245
 246         } else {
 247                 /* UHCI */
 248                 int     region;
 249
 250                 for (region = 0; region < PCI_ROM_RESOURCE; region++) {
 251                         if (!(pci_resource_flags(dev, region) &
 252                                         IORESOURCE_IO))
 253                                 continue;
 254
 255                         hcd->rsrc_start = pci_resource_start(dev, region);
 256                         hcd->rsrc_len = pci_resource_len(dev, region);
 257                         if (request_region(hcd->rsrc_start, hcd->rsrc_len,
 258                                         driver->description))
 259                                 break;
 260                 }
 261                 if (region == PCI_ROM_RESOURCE) {
 262                         dev_dbg(&dev->dev, "no i/o regions available\n");
 263                         retval = -EBUSY;
 264                         goto put_hcd;
 265                 }
 266         }
 267
 268         pci_set_master(dev);
 269
 270         /* Note: dev_set_drvdata must be called while holding the rwsem */
 271         if (dev->class == CL_EHCI) {
 272                 down_write(&companions_rwsem);
 273                 dev_set_drvdata(&dev->dev, hcd);
 274                 for_each_companion(dev, hcd, ehci_pre_add);
 275                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 276                 if (retval != 0)
 277                         dev_set_drvdata(&dev->dev, NULL);
 278                 for_each_companion(dev, hcd, ehci_post_add);
 279                 up_write(&companions_rwsem);
 280         } else {
 281                 down_read(&companions_rwsem);
 282                 dev_set_drvdata(&dev->dev, hcd);
 283                 retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
 284                 if (retval != 0)
 285                         dev_set_drvdata(&dev->dev, NULL);
 286                 else
 287                         for_each_companion(dev, hcd, non_ehci_add);
 288                 up_read(&companions_rwsem);
 289         }
 290
 291         if (retval != 0)
 292                 goto unmap_registers;
 293         device_wakeup_enable(hcd->self.controller);
 294
 295         if (pci_dev_run_wake(dev))
 296                 pm_runtime_put_noidle(&dev->dev);
 297         return retval;
 298
 299 unmap_registers:
 300         if (driver->flags & HCD_MEMORY) {
 301                 iounmap(hcd->regs);
 302 release_mem_region:
 303                 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 304         } else
 305                 release_region(hcd->rsrc_start, hcd->rsrc_len);
 306 put_hcd:
 307         usb_put_hcd(hcd);
 308 disable_pci:
 309         pci_disable_device(dev);
 310         dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
 311         return retval;
 312 }
 313 EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
 314
 315
 316 /* may be called without controller electrically present */
 317 /* may be called with controller, bus, and devices active */
 318
 319 /**
 320  * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
 321  * @dev: USB Host Controller being removed
 322  * Context: !in_interrupt()
 323  *
 324  * Reverses the effect of usb_hcd_pci_probe(), first invoking
 325  * the HCD's stop() method.  It is always called from a thread
 326  * context, normally "rmmod", "apmd", or something similar.
 327  *
 328  * Store this function in the HCD's struct pci_driver as remove().
 329  */
 330 void usb_hcd_pci_remove(struct pci_dev *dev)
 331 {
 332         struct usb_hcd          *hcd;
 333
 334         hcd = pci_get_drvdata(dev);
 335         if (!hcd)
 336                 return;
 337
 338         if (pci_dev_run_wake(dev))
 339                 pm_runtime_get_noresume(&dev->dev);
 340
 341         /* Fake an interrupt request in order to give the driver a chance
 342          * to test whether the controller hardware has been removed (e.g.,
 343          * cardbus physical eject).
 344          */
 345         local_irq_disable();
 346         usb_hcd_irq(0, hcd);
 347         local_irq_enable();
 348
 349         /* Note: dev_set_drvdata must be called while holding the rwsem */
 350         if (dev->class == CL_EHCI) {
 351                 down_write(&companions_rwsem);
 352                 for_each_companion(dev, hcd, ehci_remove);
 353                 usb_remove_hcd(hcd);
 354                 dev_set_drvdata(&dev->dev, NULL);
 355                 up_write(&companions_rwsem);
 356         } else {
 357                 /* Not EHCI; just clear the companion pointer */
 358                 down_read(&companions_rwsem);
 359                 hcd->self.hs_companion = NULL;
 360                 usb_remove_hcd(hcd);
 361                 dev_set_drvdata(&dev->dev, NULL);
 362                 up_read(&companions_rwsem);
 363         }
 364
 365         if (hcd->driver->flags & HCD_MEMORY) {
 366                 iounmap(hcd->regs);
 367                 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 368         } else {
 369                 release_region(hcd->rsrc_start, hcd->rsrc_len);
 370         }
 371
 372         usb_put_hcd(hcd);
 373         pci_disable_device(dev);
 374 }
 375 EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
 376
 377 /**
 378  * usb_hcd_pci_shutdown - shutdown host controller
 379  * @dev: USB Host Controller being shutdown
 380  */
 381 void usb_hcd_pci_shutdown(struct pci_dev *dev)
 382 {
 383         struct usb_hcd          *hcd;
 384
 385         hcd = pci_get_drvdata(dev);
 386         if (!hcd)
 387                 return;
 388
 389         if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&
 390                         hcd->driver->shutdown) {
 391                 hcd->driver->shutdown(hcd);
 392                 if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0)
 393                         free_irq(hcd->irq, hcd);
 394                 pci_disable_device(dev);
 395         }
 396 }
 397 EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
 398
 399 #ifdef  CONFIG_PM
 400
 401 #ifdef  CONFIG_PPC_PMAC
 402 static void powermac_set_asic(struct pci_dev *pci_dev, int enable)
 403 {
 404         /* Enanble or disable ASIC clocks for USB */
 405         if (machine_is(powermac)) {
 406                 struct device_node      *of_node;
 407
 408                 of_node = pci_device_to_OF_node(pci_dev);
 409                 if (of_node)
 410                         pmac_call_feature(PMAC_FTR_USB_ENABLE,
 411                                         of_node, 0, enable);
 412         }
 413 }
 414
 415 #else
 416
 417 static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable)
 418 {}
 419
 420 #endif  /* CONFIG_PPC_PMAC */
 421
 422 static int check_root_hub_suspended(struct device *dev)
 423 {
 424         struct pci_dev          *pci_dev = to_pci_dev(dev);
 425         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 426
 427         if (HCD_RH_RUNNING(hcd)) {
 428                 dev_warn(dev, "Root hub is not suspended\n");
 429                 return -EBUSY;
 430         }
 431         if (hcd->shared_hcd) {
 432                 hcd = hcd->shared_hcd;
 433                 if (HCD_RH_RUNNING(hcd)) {
 434                         dev_warn(dev, "Secondary root hub is not suspended\n");
 435                         return -EBUSY;
 436                 }
 437         }
 438         return 0;
 439 }
 440
 441 static int suspend_common(struct device *dev, bool do_wakeup)
 442 {
 443         struct pci_dev          *pci_dev = to_pci_dev(dev);
 444         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 445         int                     retval;
 446
 447         /* Root hub suspend should have stopped all downstream traffic,
 448          * and all bus master traffic.  And done so for both the interface
 449          * and the stub usb_device (which we check here).  But maybe it
 450          * didn't; writing sysfs power/state files ignores such rules...
 451          */
 452         retval = check_root_hub_suspended(dev);
 453         if (retval)
 454                 return retval;
 455
 456         if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) {
 457                 /* Optimization: Don't suspend if a root-hub wakeup is
 458                  * pending and it would cause the HCD to wake up anyway.
 459                  */
 460                 if (do_wakeup && HCD_WAKEUP_PENDING(hcd))
 461                         return -EBUSY;
 462                 if (do_wakeup && hcd->shared_hcd &&
 463                                 HCD_WAKEUP_PENDING(hcd->shared_hcd))
 464                         return -EBUSY;
 465                 retval = hcd->driver->pci_suspend(hcd, do_wakeup);
 466                 suspend_report_result(hcd->driver->pci_suspend, retval);
 467
 468                 /* Check again in case wakeup raced with pci_suspend */
 469                 if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) ||
 470                                 (retval == 0 && do_wakeup && hcd->shared_hcd &&
 471                                  HCD_WAKEUP_PENDING(hcd->shared_hcd))) {
 472                         if (hcd->driver->pci_resume)
 473                                 hcd->driver->pci_resume(hcd, false);
 474                         retval = -EBUSY;
 475                 }
 476                 if (retval)
 477                         return retval;
 478         }
 479
 480         /* If MSI-X is enabled, the driver will have synchronized all vectors
 481          * in pci_suspend(). If MSI or legacy PCI is enabled, that will be
 482          * synchronized here.
 483          */
 484         if (!hcd->msix_enabled)
 485                 synchronize_irq(pci_dev->irq);
 486
 487         /* Downstream ports from this root hub should already be quiesced, so
 488          * there will be no DMA activity.  Now we can shut down the upstream
 489          * link (except maybe for PME# resume signaling).  We'll enter a
 490          * low power state during suspend_noirq, if the hardware allows.
 491          */
 492         pci_disable_device(pci_dev);
 493         return retval;
 494 }
 495
 496 static int resume_common(struct device *dev, int event)
 497 {
 498         struct pci_dev          *pci_dev = to_pci_dev(dev);
 499         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 500         int                     retval;
 501
 502         if (HCD_RH_RUNNING(hcd) ||
 503                         (hcd->shared_hcd &&
 504                          HCD_RH_RUNNING(hcd->shared_hcd))) {
 505                 dev_dbg(dev, "can't resume, not suspended!\n");
 506                 return 0;
 507         }
 508
 509         retval = pci_enable_device(pci_dev);
 510         if (retval < 0) {
 511                 dev_err(dev, "can't re-enable after resume, %d!\n", retval);
 512                 return retval;
 513         }
 514
 515         pci_set_master(pci_dev);
 516
 517         if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {
 518
 519                 /*
 520                  * Only EHCI controllers have to wait for their companions.
 521                  * No locking is needed because PCI controller drivers do not
 522                  * get unbound during system resume.
 523                  */
 524                 if (pci_dev->class == CL_EHCI && event != PM_EVENT_AUTO_RESUME)
 525                         for_each_companion(pci_dev, hcd,
 526                                         ehci_wait_for_companions);
 527
 528                 retval = hcd->driver->pci_resume(hcd,
 529                                 event == PM_EVENT_RESTORE);
 530                 if (retval) {
 531                         dev_err(dev, "PCI post-resume error %d!\n", retval);
 532                         if (hcd->shared_hcd)
 533                                 usb_hc_died(hcd->shared_hcd);
 534                         usb_hc_died(hcd);
 535                 }
 536         }
 537         return retval;
 538 }
 539
 540 #ifdef  CONFIG_PM_SLEEP
 541
 542 static int hcd_pci_suspend(struct device *dev)
 543 {
 544         return suspend_common(dev, device_may_wakeup(dev));
 545 }
 546
 547 static int hcd_pci_suspend_noirq(struct device *dev)
 548 {
 549         struct pci_dev          *pci_dev = to_pci_dev(dev);
 550         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 551         int                     retval;
 552
 553         retval = check_root_hub_suspended(dev);
 554         if (retval)
 555                 return retval;
 556
 557         pci_save_state(pci_dev);
 558
 559         /* If the root hub is dead rather than suspended, disallow remote
 560          * wakeup.  usb_hc_died() should ensure that both hosts are marked as
 561          * dying, so we only need to check the primary roothub.
 562          */
 563         if (HCD_DEAD(hcd))
 564                 device_set_wakeup_enable(dev, 0);
 565         dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
 566
 567         /* Possibly enable remote wakeup,
 568          * choose the appropriate low-power state, and go to that state.
 569          */
 570         retval = pci_prepare_to_sleep(pci_dev);
 571         if (retval == -EIO) {           /* Low-power not supported */
 572                 dev_dbg(dev, "--> PCI D0 legacy\n");
 573                 retval = 0;
 574         } else if (retval == 0) {
 575                 dev_dbg(dev, "--> PCI %s\n",
 576                                 pci_power_name(pci_dev->current_state));
 577         } else {
 578                 suspend_report_result(pci_prepare_to_sleep, retval);
 579                 return retval;
 580         }
 581
 582         powermac_set_asic(pci_dev, 0);
 583         return retval;
 584 }
 585
 586 static int hcd_pci_resume_noirq(struct device *dev)
 587 {
 588         struct pci_dev          *pci_dev = to_pci_dev(dev);
 589
 590         powermac_set_asic(pci_dev, 1);
 591
 592         /* Go back to D0 and disable remote wakeup */
 593         pci_back_from_sleep(pci_dev);
 594         return 0;
 595 }
 596
 597 static int hcd_pci_resume(struct device *dev)
 598 {
 599         return resume_common(dev, PM_EVENT_RESUME);
 600 }
 601
 602 static int hcd_pci_restore(struct device *dev)
 603 {
 604         return resume_common(dev, PM_EVENT_RESTORE);
 605 }
 606
 607 #else
 608
 609 #define hcd_pci_suspend         NULL
 610 #define hcd_pci_suspend_noirq   NULL
 611 #define hcd_pci_resume_noirq    NULL
 612 #define hcd_pci_resume          NULL
 613 #define hcd_pci_restore         NULL
 614
 615 #endif  /* CONFIG_PM_SLEEP */
 616
 617 static int hcd_pci_runtime_suspend(struct device *dev)
 618 {
 619         int     retval;
 620
 621         retval = suspend_common(dev, true);
 622         if (retval == 0)
 623                 powermac_set_asic(to_pci_dev(dev), 0);
 624         dev_dbg(dev, "hcd_pci_runtime_suspend: %d\n", retval);
 625         return retval;
 626 }
 627
 628 static int hcd_pci_runtime_resume(struct device *dev)
 629 {
 630         int     retval;
 631
 632         powermac_set_asic(to_pci_dev(dev), 1);
 633         retval = resume_common(dev, PM_EVENT_AUTO_RESUME);
 634         dev_dbg(dev, "hcd_pci_runtime_resume: %d\n", retval);
 635         return retval;
 636 }
 637
 638 const struct dev_pm_ops usb_hcd_pci_pm_ops = {
 639         .suspend        = hcd_pci_suspend,
 640         .suspend_noirq  = hcd_pci_suspend_noirq,
 641         .resume_noirq   = hcd_pci_resume_noirq,
 642         .resume         = hcd_pci_resume,
 643         .freeze         = check_root_hub_suspended,
 644         .freeze_noirq   = check_root_hub_suspended,
 645         .thaw_noirq     = NULL,
 646         .thaw           = NULL,
 647         .poweroff       = hcd_pci_suspend,
 648         .poweroff_noirq = hcd_pci_suspend_noirq,
 649         .restore_noirq  = hcd_pci_resume_noirq,
 650         .restore        = hcd_pci_restore,
 651         .runtime_suspend = hcd_pci_runtime_suspend,
 652         .runtime_resume = hcd_pci_runtime_resume,
 653 };
 654 EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
 655
 656 #endif  /* CONFIG_PM */