drivers/usb/host/xhci-pci.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * xHCI host controller driver PCI Bus Glue.
   4  *
   5  * Copyright (C) 2008 Intel Corp.
   6  *
   7  * Author: Sarah Sharp
   8  * Some code borrowed from the Linux EHCI driver.
   9  */
  10
  11 #include <linux/pci.h>
  12 #include <linux/slab.h>
  13 #include <linux/module.h>
  14 #include <linux/acpi.h>
  15 #include <linux/reset.h>
  16 #include <linux/suspend.h>
  17
  18 #include "xhci.h"
  19 #include "xhci-trace.h"
  20 #include "xhci-pci.h"
  21
  22 #define SSIC_PORT_NUM           2
  23 #define SSIC_PORT_CFG2          0x880c
  24 #define SSIC_PORT_CFG2_OFFSET   0x30
  25 #define PROG_DONE               (1 << 30)
  26 #define SSIC_PORT_UNUSED        (1 << 31)
  27 #define SPARSE_DISABLE_BIT      17
  28 #define SPARSE_CNTL_ENABLE      0xC12C
  29
  30 /* Device for a quirk */
  31 #define PCI_VENDOR_ID_FRESCO_LOGIC      0x1b73
  32 #define PCI_DEVICE_ID_FRESCO_LOGIC_PDK  0x1000
  33 #define PCI_DEVICE_ID_FRESCO_LOGIC_FL1009       0x1009
  34 #define PCI_DEVICE_ID_FRESCO_LOGIC_FL1100       0x1100
  35 #define PCI_DEVICE_ID_FRESCO_LOGIC_FL1400       0x1400
  36
  37 #define PCI_VENDOR_ID_ETRON             0x1b6f
  38 #define PCI_DEVICE_ID_EJ168             0x7023
  39
  40 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_XHCI      0x8c31
  41 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI   0x9c31
  42 #define PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_XHCI        0x9cb1
  43 #define PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI             0x22b5
  44 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI         0xa12f
  45 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI        0x9d2f
  46 #define PCI_DEVICE_ID_INTEL_BROXTON_M_XHCI              0x0aa8
  47 #define PCI_DEVICE_ID_INTEL_BROXTON_B_XHCI              0x1aa8
  48 #define PCI_DEVICE_ID_INTEL_APL_XHCI                    0x5aa8
  49 #define PCI_DEVICE_ID_INTEL_DNV_XHCI                    0x19d0
  50 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_XHCI        0x15b5
  51 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_XHCI        0x15b6
  52 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_XHCI        0x15c1
  53 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_XHCI      0x15db
  54 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_XHCI      0x15d4
  55 #define PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_XHCI         0x15e9
  56 #define PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_XHCI         0x15ec
  57 #define PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_XHCI         0x15f0
  58 #define PCI_DEVICE_ID_INTEL_ICE_LAKE_XHCI               0x8a13
  59 #define PCI_DEVICE_ID_INTEL_CML_XHCI                    0xa3af
  60 #define PCI_DEVICE_ID_INTEL_TIGER_LAKE_XHCI             0x9a13
  61 #define PCI_DEVICE_ID_INTEL_MAPLE_RIDGE_XHCI            0x1138
  62 #define PCI_DEVICE_ID_INTEL_ALDER_LAKE_PCH_XHCI         0x51ed
  63 #define PCI_DEVICE_ID_INTEL_ALDER_LAKE_N_PCH_XHCI       0x54ed
  64
  65 #define PCI_DEVICE_ID_AMD_RENOIR_XHCI                   0x1639
  66 #define PCI_DEVICE_ID_AMD_PROMONTORYA_4                 0x43b9
  67 #define PCI_DEVICE_ID_AMD_PROMONTORYA_3                 0x43ba
  68 #define PCI_DEVICE_ID_AMD_PROMONTORYA_2                 0x43bb
  69 #define PCI_DEVICE_ID_AMD_PROMONTORYA_1                 0x43bc
  70
  71 #define PCI_DEVICE_ID_ASMEDIA_1042_XHCI                 0x1042
  72 #define PCI_DEVICE_ID_ASMEDIA_1042A_XHCI                0x1142
  73 #define PCI_DEVICE_ID_ASMEDIA_1142_XHCI                 0x1242
  74 #define PCI_DEVICE_ID_ASMEDIA_2142_XHCI                 0x2142
  75 #define PCI_DEVICE_ID_ASMEDIA_3242_XHCI                 0x3242
  76
  77 static const char hcd_name[] = "xhci_hcd";
  78
  79 static struct hc_driver __read_mostly xhci_pci_hc_driver;
  80
  81 static int xhci_pci_setup(struct usb_hcd *hcd);
  82 static int xhci_pci_run(struct usb_hcd *hcd);
  83 static int xhci_pci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
  84                                       struct usb_tt *tt, gfp_t mem_flags);
  85
  86 static const struct xhci_driver_overrides xhci_pci_overrides __initconst = {
  87         .reset = xhci_pci_setup,
  88         .start = xhci_pci_run,
  89         .update_hub_device = xhci_pci_update_hub_device,
  90 };
  91
  92 static void xhci_msix_sync_irqs(struct xhci_hcd *xhci)
  93 {
  94         struct usb_hcd *hcd = xhci_to_hcd(xhci);
  95
  96         if (hcd->msix_enabled) {
  97                 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
  98                 int i;
  99
 100                 for (i = 0; i < xhci->msix_count; i++)
 101                         synchronize_irq(pci_irq_vector(pdev, i));
 102         }
 103 }
 104
 105 /* Free any IRQs and disable MSI-X */
 106 static void xhci_cleanup_msix(struct xhci_hcd *xhci)
 107 {
 108         struct usb_hcd *hcd = xhci_to_hcd(xhci);
 109         struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
 110
 111         /* return if using legacy interrupt */
 112         if (hcd->irq > 0)
 113                 return;
 114
 115         if (hcd->msix_enabled) {
 116                 int i;
 117
 118                 for (i = 0; i < xhci->msix_count; i++)
 119                         free_irq(pci_irq_vector(pdev, i), xhci_to_hcd(xhci));
 120         } else {
 121                 free_irq(pci_irq_vector(pdev, 0), xhci_to_hcd(xhci));
 122         }
 123
 124         pci_free_irq_vectors(pdev);
 125         hcd->msix_enabled = 0;
 126 }
 127
 128 /*
 129  * Set up MSI
 130  */
 131 static int xhci_setup_msi(struct xhci_hcd *xhci)
 132 {
 133         int ret;
 134         /*
 135          * TODO:Check with MSI Soc for sysdev
 136          */
 137         struct pci_dev  *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
 138
 139         ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);
 140         if (ret < 0) {
 141                 xhci_dbg_trace(xhci, trace_xhci_dbg_init,
 142                                 "failed to allocate MSI entry");
 143                 return ret;
 144         }
 145
 146         ret = request_irq(pdev->irq, xhci_msi_irq,
 147                                 0, "xhci_hcd", xhci_to_hcd(xhci));
 148         if (ret) {
 149                 xhci_dbg_trace(xhci, trace_xhci_dbg_init,
 150                                 "disable MSI interrupt");
 151                 pci_free_irq_vectors(pdev);
 152         }
 153
 154         return ret;
 155 }
 156
 157 /*
 158  * Set up MSI-X
 159  */
 160 static int xhci_setup_msix(struct xhci_hcd *xhci)
 161 {
 162         int i, ret;
 163         struct usb_hcd *hcd = xhci_to_hcd(xhci);
 164         struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
 165
 166         /*
 167          * calculate number of msi-x vectors supported.
 168          * - HCS_MAX_INTRS: the max number of interrupts the host can handle,
 169          *   with max number of interrupters based on the xhci HCSPARAMS1.
 170          * - num_online_cpus: maximum msi-x vectors per CPUs core.
 171          *   Add additional 1 vector to ensure always available interrupt.
 172          */
 173         xhci->msix_count = min(num_online_cpus() + 1,
 174                                 HCS_MAX_INTRS(xhci->hcs_params1));
 175
 176         ret = pci_alloc_irq_vectors(pdev, xhci->msix_count, xhci->msix_count,
 177                         PCI_IRQ_MSIX);
 178         if (ret < 0) {
 179                 xhci_dbg_trace(xhci, trace_xhci_dbg_init,
 180                                 "Failed to enable MSI-X");
 181                 return ret;
 182         }
 183
 184         for (i = 0; i < xhci->msix_count; i++) {
 185                 ret = request_irq(pci_irq_vector(pdev, i), xhci_msi_irq, 0,
 186                                 "xhci_hcd", xhci_to_hcd(xhci));
 187                 if (ret)
 188                         goto disable_msix;
 189         }
 190
 191         hcd->msix_enabled = 1;
 192         return ret;
 193
 194 disable_msix:
 195         xhci_dbg_trace(xhci, trace_xhci_dbg_init, "disable MSI-X interrupt");
 196         while (--i >= 0)
 197                 free_irq(pci_irq_vector(pdev, i), xhci_to_hcd(xhci));
 198         pci_free_irq_vectors(pdev);
 199         return ret;
 200 }
 201
 202 static int xhci_try_enable_msi(struct usb_hcd *hcd)
 203 {
 204         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 205         struct pci_dev  *pdev;
 206         int ret;
 207
 208         pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
 209         /*
 210          * Some Fresco Logic host controllers advertise MSI, but fail to
 211          * generate interrupts.  Don't even try to enable MSI.
 212          */
 213         if (xhci->quirks & XHCI_BROKEN_MSI)
 214                 goto legacy_irq;
 215
 216         /* unregister the legacy interrupt */
 217         if (hcd->irq)
 218                 free_irq(hcd->irq, hcd);
 219         hcd->irq = 0;
 220
 221         ret = xhci_setup_msix(xhci);
 222         if (ret)
 223                 /* fall back to msi*/
 224                 ret = xhci_setup_msi(xhci);
 225
 226         if (!ret) {
 227                 hcd->msi_enabled = 1;
 228                 return 0;
 229         }
 230
 231         if (!pdev->irq) {
 232                 xhci_err(xhci, "No msi-x/msi found and no IRQ in BIOS\n");
 233                 return -EINVAL;
 234         }
 235
 236  legacy_irq:
 237         if (!strlen(hcd->irq_descr))
 238                 snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d",
 239                          hcd->driver->description, hcd->self.busnum);
 240
 241         /* fall back to legacy interrupt*/
 242         ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED,
 243                         hcd->irq_descr, hcd);
 244         if (ret) {
 245                 xhci_err(xhci, "request interrupt %d failed\n",
 246                                 pdev->irq);
 247                 return ret;
 248         }
 249         hcd->irq = pdev->irq;
 250         return 0;
 251 }
 252
 253 static int xhci_pci_run(struct usb_hcd *hcd)
 254 {
 255         int ret;
 256
 257         if (usb_hcd_is_primary_hcd(hcd)) {
 258                 ret = xhci_try_enable_msi(hcd);
 259                 if (ret)
 260                         return ret;
 261         }
 262
 263         return xhci_run(hcd);
 264 }
 265
 266 static void xhci_pci_stop(struct usb_hcd *hcd)
 267 {
 268         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 269
 270         xhci_stop(hcd);
 271
 272         if (usb_hcd_is_primary_hcd(hcd))
 273                 xhci_cleanup_msix(xhci);
 274 }
 275
 276 /* called after powerup, by probe or system-pm "wakeup" */
 277 static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
 278 {
 279         /*
 280          * TODO: Implement finding debug ports later.
 281          * TODO: see if there are any quirks that need to be added to handle
 282          * new extended capabilities.
 283          */
 284
 285         /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
 286         if (!pci_set_mwi(pdev))
 287                 xhci_dbg(xhci, "MWI active\n");
 288
 289         xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
 290         return 0;
 291 }
 292
 293 static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 294 {
 295         struct pci_dev                  *pdev = to_pci_dev(dev);
 296         struct xhci_driver_data         *driver_data;
 297         const struct pci_device_id      *id;
 298
 299         id = pci_match_id(to_pci_driver(pdev->dev.driver)->id_table, pdev);
 300
 301         if (id && id->driver_data) {
 302                 driver_data = (struct xhci_driver_data *)id->driver_data;
 303                 xhci->quirks |= driver_data->quirks;
 304         }
 305
 306         /* Look for vendor-specific quirks */
 307         if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
 308                         (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK ||
 309                          pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1400)) {
 310                 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
 311                                 pdev->revision == 0x0) {
 312                         xhci->quirks |= XHCI_RESET_EP_QUIRK;
 313                         xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
 314                                 "XHCI_RESET_EP_QUIRK for this evaluation HW is deprecated");
 315                 }
 316                 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
 317                                 pdev->revision == 0x4) {
 318                         xhci->quirks |= XHCI_SLOW_SUSPEND;
 319                         xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
 320                                 "QUIRK: Fresco Logic xHC revision %u"
 321                                 "must be suspended extra slowly",
 322                                 pdev->revision);
 323                 }
 324                 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK)
 325                         xhci->quirks |= XHCI_BROKEN_STREAMS;
 326                 /* Fresco Logic confirms: all revisions of this chip do not
 327                  * support MSI, even though some of them claim to in their PCI
 328                  * capabilities.
 329                  */
 330                 xhci->quirks |= XHCI_BROKEN_MSI;
 331                 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
 332                                 "QUIRK: Fresco Logic revision %u "
 333                                 "has broken MSI implementation",
 334                                 pdev->revision);
 335                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 336         }
 337
 338         if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
 339                         pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1009)
 340                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 341
 342         if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
 343                         pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1100)
 344                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 345
 346         if (pdev->vendor == PCI_VENDOR_ID_NEC)
 347                 xhci->quirks |= XHCI_NEC_HOST;
 348
 349         if (pdev->vendor == PCI_VENDOR_ID_AMD && xhci->hci_version == 0x96)
 350                 xhci->quirks |= XHCI_AMD_0x96_HOST;
 351
 352         /* AMD PLL quirk */
 353         if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_quirk_pll_check())
 354                 xhci->quirks |= XHCI_AMD_PLL_FIX;
 355
 356         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
 357                 (pdev->device == 0x145c ||
 358                  pdev->device == 0x15e0 ||
 359                  pdev->device == 0x15e1 ||
 360                  pdev->device == 0x43bb))
 361                 xhci->quirks |= XHCI_SUSPEND_DELAY;
 362
 363         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
 364             (pdev->device == 0x15e0 || pdev->device == 0x15e1))
 365                 xhci->quirks |= XHCI_SNPS_BROKEN_SUSPEND;
 366
 367         if (pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x15e5) {
 368                 xhci->quirks |= XHCI_DISABLE_SPARSE;
 369                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 370         }
 371
 372         if (pdev->vendor == PCI_VENDOR_ID_AMD)
 373                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 374
 375         if ((pdev->vendor == PCI_VENDOR_ID_AMD) &&
 376                 ((pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_4) ||
 377                 (pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_3) ||
 378                 (pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_2) ||
 379                 (pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_1)))
 380                 xhci->quirks |= XHCI_U2_DISABLE_WAKE;
 381
 382         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
 383                 pdev->device == PCI_DEVICE_ID_AMD_RENOIR_XHCI)
 384                 xhci->quirks |= XHCI_BROKEN_D3COLD_S2I;
 385
 386         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
 387                 xhci->quirks |= XHCI_LPM_SUPPORT;
 388                 xhci->quirks |= XHCI_INTEL_HOST;
 389                 xhci->quirks |= XHCI_AVOID_BEI;
 390         }
 391         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 392                         pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) {
 393                 xhci->quirks |= XHCI_EP_LIMIT_QUIRK;
 394                 xhci->limit_active_eps = 64;
 395                 xhci->quirks |= XHCI_SW_BW_CHECKING;
 396                 /*
 397                  * PPT desktop boards DH77EB and DH77DF will power back on after
 398                  * a few seconds of being shutdown.  The fix for this is to
 399                  * switch the ports from xHCI to EHCI on shutdown.  We can't use
 400                  * DMI information to find those particular boards (since each
 401                  * vendor will change the board name), so we have to key off all
 402                  * PPT chipsets.
 403                  */
 404                 xhci->quirks |= XHCI_SPURIOUS_REBOOT;
 405         }
 406         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 407                 (pdev->device == PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI ||
 408                  pdev->device == PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_XHCI)) {
 409                 xhci->quirks |= XHCI_SPURIOUS_REBOOT;
 410                 xhci->quirks |= XHCI_SPURIOUS_WAKEUP;
 411         }
 412         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 413                 (pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
 414                  pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI ||
 415                  pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
 416                  pdev->device == PCI_DEVICE_ID_INTEL_BROXTON_M_XHCI ||
 417                  pdev->device == PCI_DEVICE_ID_INTEL_BROXTON_B_XHCI ||
 418                  pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI ||
 419                  pdev->device == PCI_DEVICE_ID_INTEL_DNV_XHCI ||
 420                  pdev->device == PCI_DEVICE_ID_INTEL_CML_XHCI)) {
 421                 xhci->quirks |= XHCI_PME_STUCK_QUIRK;
 422         }
 423         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 424             pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI)
 425                 xhci->quirks |= XHCI_SSIC_PORT_UNUSED;
 426         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 427             (pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
 428              pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
 429              pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI))
 430                 xhci->quirks |= XHCI_INTEL_USB_ROLE_SW;
 431         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 432             (pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
 433              pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
 434              pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI ||
 435              pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI ||
 436              pdev->device == PCI_DEVICE_ID_INTEL_DNV_XHCI))
 437                 xhci->quirks |= XHCI_MISSING_CAS;
 438
 439         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 440             (pdev->device == PCI_DEVICE_ID_INTEL_ALDER_LAKE_PCH_XHCI ||
 441              pdev->device == PCI_DEVICE_ID_INTEL_ALDER_LAKE_N_PCH_XHCI))
 442                 xhci->quirks |= XHCI_RESET_TO_DEFAULT;
 443
 444         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 445             (pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_XHCI ||
 446              pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_XHCI ||
 447              pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_XHCI ||
 448              pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_XHCI ||
 449              pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_XHCI ||
 450              pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_XHCI ||
 451              pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_XHCI ||
 452              pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_XHCI ||
 453              pdev->device == PCI_DEVICE_ID_INTEL_ICE_LAKE_XHCI ||
 454              pdev->device == PCI_DEVICE_ID_INTEL_TIGER_LAKE_XHCI ||
 455              pdev->device == PCI_DEVICE_ID_INTEL_MAPLE_RIDGE_XHCI))
 456                 xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
 457
 458         if (pdev->vendor == PCI_VENDOR_ID_ETRON &&
 459                         pdev->device == PCI_DEVICE_ID_EJ168) {
 460                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 461                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 462                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 463         }
 464         if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
 465             pdev->device == 0x0014) {
 466                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 467                 xhci->quirks |= XHCI_ZERO_64B_REGS;
 468         }
 469         if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
 470             pdev->device == 0x0015) {
 471                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 472                 xhci->quirks |= XHCI_ZERO_64B_REGS;
 473         }
 474         if (pdev->vendor == PCI_VENDOR_ID_VIA)
 475                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 476
 477         /* See https://bugzilla.kernel.org/show_bug.cgi?id=79511 */
 478         if (pdev->vendor == PCI_VENDOR_ID_VIA &&
 479                         pdev->device == 0x3432)
 480                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 481
 482         if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483)
 483                 xhci->quirks |= XHCI_LPM_SUPPORT;
 484
 485         if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
 486                 pdev->device == PCI_DEVICE_ID_ASMEDIA_1042_XHCI) {
 487                 /*
 488                  * try to tame the ASMedia 1042 controller which reports 0.96
 489                  * but appears to behave more like 1.0
 490                  */
 491                 xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
 492                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 493         }
 494         if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
 495                 pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI) {
 496                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 497                 xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
 498         }
 499         if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
 500             (pdev->device == PCI_DEVICE_ID_ASMEDIA_1142_XHCI ||
 501              pdev->device == PCI_DEVICE_ID_ASMEDIA_2142_XHCI ||
 502              pdev->device == PCI_DEVICE_ID_ASMEDIA_3242_XHCI))
 503                 xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
 504
 505         if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
 506                 pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI)
 507                 xhci->quirks |= XHCI_ASMEDIA_MODIFY_FLOWCONTROL;
 508
 509         if (pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241)
 510                 xhci->quirks |= XHCI_LIMIT_ENDPOINT_INTERVAL_7;
 511
 512         if ((pdev->vendor == PCI_VENDOR_ID_BROADCOM ||
 513              pdev->vendor == PCI_VENDOR_ID_CAVIUM) &&
 514              pdev->device == 0x9026)
 515                 xhci->quirks |= XHCI_RESET_PLL_ON_DISCONNECT;
 516
 517         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
 518             (pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_2 ||
 519              pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_4))
 520                 xhci->quirks |= XHCI_NO_SOFT_RETRY;
 521
 522         if (pdev->vendor == PCI_VENDOR_ID_ZHAOXIN) {
 523                 xhci->quirks |= XHCI_ZHAOXIN_HOST;
 524                 xhci->quirks |= XHCI_LPM_SUPPORT;
 525
 526                 if (pdev->device == 0x9202) {
 527                         xhci->quirks |= XHCI_RESET_ON_RESUME;
 528                         xhci->quirks |= XHCI_ZHAOXIN_TRB_FETCH;
 529                 }
 530
 531                 if (pdev->device == 0x9203)
 532                         xhci->quirks |= XHCI_ZHAOXIN_TRB_FETCH;
 533         }
 534
 535         /* xHC spec requires PCI devices to support D3hot and D3cold */
 536         if (xhci->hci_version >= 0x120)
 537                 xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
 538
 539         if (xhci->quirks & XHCI_RESET_ON_RESUME)
 540                 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
 541                                 "QUIRK: Resetting on resume");
 542 }
 543
 544 #ifdef CONFIG_ACPI
 545 static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
 546 {
 547         static const guid_t intel_dsm_guid =
 548                 GUID_INIT(0xac340cb7, 0xe901, 0x45bf,
 549                           0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23);
 550         union acpi_object *obj;
 551
 552         obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), &intel_dsm_guid, 3, 1,
 553                                 NULL);
 554         ACPI_FREE(obj);
 555 }
 556
 557 static void xhci_find_lpm_incapable_ports(struct usb_hcd *hcd, struct usb_device *hdev)
 558 {
 559         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 560         struct xhci_hub *rhub = &xhci->usb3_rhub;
 561         int ret;
 562         int i;
 563
 564         /* This is not the usb3 roothub we are looking for */
 565         if (hcd != rhub->hcd)
 566                 return;
 567
 568         if (hdev->maxchild > rhub->num_ports) {
 569                 dev_err(&hdev->dev, "USB3 roothub port number mismatch\n");
 570                 return;
 571         }
 572
 573         for (i = 0; i < hdev->maxchild; i++) {
 574                 ret = usb_acpi_port_lpm_incapable(hdev, i);
 575
 576                 dev_dbg(&hdev->dev, "port-%d disable U1/U2 _DSM: %d\n", i + 1, ret);
 577
 578                 if (ret >= 0) {
 579                         rhub->ports[i]->lpm_incapable = ret;
 580                         continue;
 581                 }
 582         }
 583 }
 584
 585 #else
 586 static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev) { }
 587 static void xhci_find_lpm_incapable_ports(struct usb_hcd *hcd, struct usb_device *hdev) { }
 588 #endif /* CONFIG_ACPI */
 589
 590 /* called during probe() after chip reset completes */
 591 static int xhci_pci_setup(struct usb_hcd *hcd)
 592 {
 593         struct xhci_hcd         *xhci;
 594         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 595         int                     retval;
 596
 597         xhci = hcd_to_xhci(hcd);
 598         if (!xhci->sbrn)
 599                 pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
 600
 601         /* imod_interval is the interrupt moderation value in nanoseconds. */
 602         xhci->imod_interval = 40000;
 603
 604         retval = xhci_gen_setup(hcd, xhci_pci_quirks);
 605         if (retval)
 606                 return retval;
 607
 608         if (!usb_hcd_is_primary_hcd(hcd))
 609                 return 0;
 610
 611         if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
 612                 xhci_pme_acpi_rtd3_enable(pdev);
 613
 614         xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
 615
 616         /* Find any debug ports */
 617         return xhci_pci_reinit(xhci, pdev);
 618 }
 619
 620 static int xhci_pci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
 621                                       struct usb_tt *tt, gfp_t mem_flags)
 622 {
 623         /* Check if acpi claims some USB3 roothub ports are lpm incapable */
 624         if (!hdev->parent)
 625                 xhci_find_lpm_incapable_ports(hcd, hdev);
 626
 627         return xhci_update_hub_device(hcd, hdev, tt, mem_flags);
 628 }
 629
 630 /*
 631  * We need to register our own PCI probe function (instead of the USB core's
 632  * function) in order to create a second roothub under xHCI.
 633  */
 634 static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 635 {
 636         int retval;
 637         struct xhci_hcd *xhci;
 638         struct usb_hcd *hcd;
 639         struct xhci_driver_data *driver_data;
 640         struct reset_control *reset;
 641
 642         driver_data = (struct xhci_driver_data *)id->driver_data;
 643         if (driver_data && driver_data->quirks & XHCI_RENESAS_FW_QUIRK) {
 644                 retval = renesas_xhci_check_request_fw(dev, id);
 645                 if (retval)
 646                         return retval;
 647         }
 648
 649         reset = devm_reset_control_get_optional_exclusive(&dev->dev, NULL);
 650         if (IS_ERR(reset))
 651                 return PTR_ERR(reset);
 652         reset_control_reset(reset);
 653
 654         /* Prevent runtime suspending between USB-2 and USB-3 initialization */
 655         pm_runtime_get_noresume(&dev->dev);
 656
 657         /* Register the USB 2.0 roothub.
 658          * FIXME: USB core must know to register the USB 2.0 roothub first.
 659          * This is sort of silly, because we could just set the HCD driver flags
 660          * to say USB 2.0, but I'm not sure what the implications would be in
 661          * the other parts of the HCD code.
 662          */
 663         retval = usb_hcd_pci_probe(dev, &xhci_pci_hc_driver);
 664
 665         if (retval)
 666                 goto put_runtime_pm;
 667
 668         /* USB 2.0 roothub is stored in the PCI device now. */
 669         hcd = dev_get_drvdata(&dev->dev);
 670         xhci = hcd_to_xhci(hcd);
 671         xhci->reset = reset;
 672         xhci->shared_hcd = usb_create_shared_hcd(&xhci_pci_hc_driver, &dev->dev,
 673                                                  pci_name(dev), hcd);
 674         if (!xhci->shared_hcd) {
 675                 retval = -ENOMEM;
 676                 goto dealloc_usb2_hcd;
 677         }
 678
 679         retval = xhci_ext_cap_init(xhci);
 680         if (retval)
 681                 goto put_usb3_hcd;
 682
 683         retval = usb_add_hcd(xhci->shared_hcd, dev->irq,
 684                         IRQF_SHARED);
 685         if (retval)
 686                 goto put_usb3_hcd;
 687         /* Roothub already marked as USB 3.0 speed */
 688
 689         if (!(xhci->quirks & XHCI_BROKEN_STREAMS) &&
 690                         HCC_MAX_PSA(xhci->hcc_params) >= 4)
 691                 xhci->shared_hcd->can_do_streams = 1;
 692
 693         /* USB-2 and USB-3 roothubs initialized, allow runtime pm suspend */
 694         pm_runtime_put_noidle(&dev->dev);
 695
 696         if (pci_choose_state(dev, PMSG_SUSPEND) == PCI_D0)
 697                 pm_runtime_forbid(&dev->dev);
 698         else if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
 699                 pm_runtime_allow(&dev->dev);
 700
 701         dma_set_max_seg_size(&dev->dev, UINT_MAX);
 702
 703         return 0;
 704
 705 put_usb3_hcd:
 706         usb_put_hcd(xhci->shared_hcd);
 707 dealloc_usb2_hcd:
 708         usb_hcd_pci_remove(dev);
 709 put_runtime_pm:
 710         pm_runtime_put_noidle(&dev->dev);
 711         return retval;
 712 }
 713
 714 static void xhci_pci_remove(struct pci_dev *dev)
 715 {
 716         struct xhci_hcd *xhci;
 717
 718         xhci = hcd_to_xhci(pci_get_drvdata(dev));
 719
 720         xhci->xhc_state |= XHCI_STATE_REMOVING;
 721
 722         if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
 723                 pm_runtime_forbid(&dev->dev);
 724
 725         if (xhci->shared_hcd) {
 726                 usb_remove_hcd(xhci->shared_hcd);
 727                 usb_put_hcd(xhci->shared_hcd);
 728                 xhci->shared_hcd = NULL;
 729         }
 730
 731         /* Workaround for spurious wakeups at shutdown with HSW */
 732         if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
 733                 pci_set_power_state(dev, PCI_D3hot);
 734
 735         usb_hcd_pci_remove(dev);
 736 }
 737
 738 /*
 739  * In some Intel xHCI controllers, in order to get D3 working,
 740  * through a vendor specific SSIC CONFIG register at offset 0x883c,
 741  * SSIC PORT need to be marked as "unused" before putting xHCI
 742  * into D3. After D3 exit, the SSIC port need to be marked as "used".
 743  * Without this change, xHCI might not enter D3 state.
 744  */
 745 static void xhci_ssic_port_unused_quirk(struct usb_hcd *hcd, bool suspend)
 746 {
 747         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 748         u32 val;
 749         void __iomem *reg;
 750         int i;
 751
 752         for (i = 0; i < SSIC_PORT_NUM; i++) {
 753                 reg = (void __iomem *) xhci->cap_regs +
 754                                 SSIC_PORT_CFG2 +
 755                                 i * SSIC_PORT_CFG2_OFFSET;
 756
 757                 /* Notify SSIC that SSIC profile programming is not done. */
 758                 val = readl(reg) & ~PROG_DONE;
 759                 writel(val, reg);
 760
 761                 /* Mark SSIC port as unused(suspend) or used(resume) */
 762                 val = readl(reg);
 763                 if (suspend)
 764                         val |= SSIC_PORT_UNUSED;
 765                 else
 766                         val &= ~SSIC_PORT_UNUSED;
 767                 writel(val, reg);
 768
 769                 /* Notify SSIC that SSIC profile programming is done */
 770                 val = readl(reg) | PROG_DONE;
 771                 writel(val, reg);
 772                 readl(reg);
 773         }
 774 }
 775
 776 /*
 777  * Make sure PME works on some Intel xHCI controllers by writing 1 to clear
 778  * the Internal PME flag bit in vendor specific PMCTRL register at offset 0x80a4
 779  */
 780 static void xhci_pme_quirk(struct usb_hcd *hcd)
 781 {
 782         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 783         void __iomem *reg;
 784         u32 val;
 785
 786         reg = (void __iomem *) xhci->cap_regs + 0x80a4;
 787         val = readl(reg);
 788         writel(val | BIT(28), reg);
 789         readl(reg);
 790 }
 791
 792 static void xhci_sparse_control_quirk(struct usb_hcd *hcd)
 793 {
 794         u32 reg;
 795
 796         reg = readl(hcd->regs + SPARSE_CNTL_ENABLE);
 797         reg &= ~BIT(SPARSE_DISABLE_BIT);
 798         writel(reg, hcd->regs + SPARSE_CNTL_ENABLE);
 799 }
 800
 801 static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
 802 {
 803         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 804         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 805         int                     ret;
 806
 807         /*
 808          * Systems with the TI redriver that loses port status change events
 809          * need to have the registers polled during D3, so avoid D3cold.
 810          */
 811         if (xhci->quirks & XHCI_COMP_MODE_QUIRK)
 812                 pci_d3cold_disable(pdev);
 813
 814 #ifdef CONFIG_SUSPEND
 815         /* d3cold is broken, but only when s2idle is used */
 816         if (pm_suspend_target_state == PM_SUSPEND_TO_IDLE &&
 817             xhci->quirks & (XHCI_BROKEN_D3COLD_S2I))
 818                 pci_d3cold_disable(pdev);
 819 #endif
 820
 821         if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
 822                 xhci_pme_quirk(hcd);
 823
 824         if (xhci->quirks & XHCI_SSIC_PORT_UNUSED)
 825                 xhci_ssic_port_unused_quirk(hcd, true);
 826
 827         if (xhci->quirks & XHCI_DISABLE_SPARSE)
 828                 xhci_sparse_control_quirk(hcd);
 829
 830         ret = xhci_suspend(xhci, do_wakeup);
 831
 832         /* synchronize irq when using MSI-X */
 833         xhci_msix_sync_irqs(xhci);
 834
 835         if (ret && (xhci->quirks & XHCI_SSIC_PORT_UNUSED))
 836                 xhci_ssic_port_unused_quirk(hcd, false);
 837
 838         return ret;
 839 }
 840
 841 static int xhci_pci_resume(struct usb_hcd *hcd, pm_message_t msg)
 842 {
 843         struct xhci_hcd         *xhci = hcd_to_xhci(hcd);
 844         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 845         int                     retval = 0;
 846
 847         reset_control_reset(xhci->reset);
 848
 849         /* The BIOS on systems with the Intel Panther Point chipset may or may
 850          * not support xHCI natively.  That means that during system resume, it
 851          * may switch the ports back to EHCI so that users can use their
 852          * keyboard to select a kernel from GRUB after resume from hibernate.
 853          *
 854          * The BIOS is supposed to remember whether the OS had xHCI ports
 855          * enabled before resume, and switch the ports back to xHCI when the
 856          * BIOS/OS semaphore is written, but we all know we can't trust BIOS
 857          * writers.
 858          *
 859          * Unconditionally switch the ports back to xHCI after a system resume.
 860          * It should not matter whether the EHCI or xHCI controller is
 861          * resumed first. It's enough to do the switchover in xHCI because
 862          * USB core won't notice anything as the hub driver doesn't start
 863          * running again until after all the devices (including both EHCI and
 864          * xHCI host controllers) have been resumed.
 865          */
 866
 867         if (pdev->vendor == PCI_VENDOR_ID_INTEL)
 868                 usb_enable_intel_xhci_ports(pdev);
 869
 870         if (xhci->quirks & XHCI_SSIC_PORT_UNUSED)
 871                 xhci_ssic_port_unused_quirk(hcd, false);
 872
 873         if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
 874                 xhci_pme_quirk(hcd);
 875
 876         retval = xhci_resume(xhci, msg);
 877         return retval;
 878 }
 879
 880 static int xhci_pci_poweroff_late(struct usb_hcd *hcd, bool do_wakeup)
 881 {
 882         struct xhci_hcd         *xhci = hcd_to_xhci(hcd);
 883         struct xhci_port        *port;
 884         struct usb_device       *udev;
 885         unsigned int            slot_id;
 886         u32                     portsc;
 887         int                     i;
 888
 889         /*
 890          * Systems with XHCI_RESET_TO_DEFAULT quirk have boot firmware that
 891          * cause significant boot delay if usb ports are in suspended U3 state
 892          * during boot. Some USB devices survive in U3 state over S4 hibernate
 893          *
 894          * Disable ports that are in U3 if remote wake is not enabled for either
 895          * host controller or connected device
 896          */
 897
 898         if (!(xhci->quirks & XHCI_RESET_TO_DEFAULT))
 899                 return 0;
 900
 901         for (i = 0; i < HCS_MAX_PORTS(xhci->hcs_params1); i++) {
 902                 port = &xhci->hw_ports[i];
 903                 portsc = readl(port->addr);
 904
 905                 if ((portsc & PORT_PLS_MASK) != XDEV_U3)
 906                         continue;
 907
 908                 slot_id = xhci_find_slot_id_by_port(port->rhub->hcd, xhci,
 909                                                     port->hcd_portnum + 1);
 910                 if (!slot_id || !xhci->devs[slot_id]) {
 911                         xhci_err(xhci, "No dev for slot_id %d for port %d-%d in U3\n",
 912                                  slot_id, port->rhub->hcd->self.busnum, port->hcd_portnum + 1);
 913                         continue;
 914                 }
 915
 916                 udev = xhci->devs[slot_id]->udev;
 917
 918                 /* if wakeup is enabled then don't disable the port */
 919                 if (udev->do_remote_wakeup && do_wakeup)
 920                         continue;
 921
 922                 xhci_dbg(xhci, "port %d-%d in U3 without wakeup, disable it\n",
 923                          port->rhub->hcd->self.busnum, port->hcd_portnum + 1);
 924                 portsc = xhci_port_state_to_neutral(portsc);
 925                 writel(portsc | PORT_PE, port->addr);
 926         }
 927
 928         return 0;
 929 }
 930
 931 static void xhci_pci_shutdown(struct usb_hcd *hcd)
 932 {
 933         struct xhci_hcd         *xhci = hcd_to_xhci(hcd);
 934         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 935
 936         xhci_shutdown(hcd);
 937         xhci_cleanup_msix(xhci);
 938
 939         /* Yet another workaround for spurious wakeups at shutdown with HSW */
 940         if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
 941                 pci_set_power_state(pdev, PCI_D3hot);
 942 }
 943
 944 /*-------------------------------------------------------------------------*/
 945
 946 static const struct xhci_driver_data reneses_data = {
 947         .quirks  = XHCI_RENESAS_FW_QUIRK,
 948         .firmware = "renesas_usb_fw.mem",
 949 };
 950
 951 /* PCI driver selection metadata; PCI hotplugging uses this */
 952 static const struct pci_device_id pci_ids[] = {
 953         { PCI_DEVICE(0x1912, 0x0014),
 954                 .driver_data =  (unsigned long)&reneses_data,
 955         },
 956         { PCI_DEVICE(0x1912, 0x0015),
 957                 .driver_data =  (unsigned long)&reneses_data,
 958         },
 959         /* handle any USB 3.0 xHCI controller */
 960         { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
 961         },
 962         { /* end: all zeroes */ }
 963 };
 964 MODULE_DEVICE_TABLE(pci, pci_ids);
 965
 966 /*
 967  * Without CONFIG_USB_XHCI_PCI_RENESAS renesas_xhci_check_request_fw() won't
 968  * load firmware, so don't encumber the xhci-pci driver with it.
 969  */
 970 #if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
 971 MODULE_FIRMWARE("renesas_usb_fw.mem");
 972 #endif
 973
 974 /* pci driver glue; this is a "new style" PCI driver module */
 975 static struct pci_driver xhci_pci_driver = {
 976         .name =         hcd_name,
 977         .id_table =     pci_ids,
 978
 979         .probe =        xhci_pci_probe,
 980         .remove =       xhci_pci_remove,
 981         /* suspend and resume implemented later */
 982
 983         .shutdown =     usb_hcd_pci_shutdown,
 984         .driver = {
 985                 .pm = pm_ptr(&usb_hcd_pci_pm_ops),
 986         },
 987 };
 988
 989 static int __init xhci_pci_init(void)
 990 {
 991         xhci_init_driver(&xhci_pci_hc_driver, &xhci_pci_overrides);
 992         xhci_pci_hc_driver.pci_suspend = pm_ptr(xhci_pci_suspend);
 993         xhci_pci_hc_driver.pci_resume = pm_ptr(xhci_pci_resume);
 994         xhci_pci_hc_driver.pci_poweroff_late = pm_ptr(xhci_pci_poweroff_late);
 995         xhci_pci_hc_driver.shutdown = pm_ptr(xhci_pci_shutdown);
 996         xhci_pci_hc_driver.stop = xhci_pci_stop;
 997         return pci_register_driver(&xhci_pci_driver);
 998 }
 999 module_init(xhci_pci_init);
1000
1001 static void __exit xhci_pci_exit(void)
1002 {
1003         pci_unregister_driver(&xhci_pci_driver);
1004 }
1005 module_exit(xhci_pci_exit);
1006
1007 MODULE_DESCRIPTION("xHCI PCI Host Controller Driver");
1008 MODULE_LICENSE("GPL");