drivers/usb/host/xhci-pci.c

   1 /*
   2  * xHCI host controller driver PCI Bus Glue.
   3  *
   4  * Copyright (C) 2008 Intel Corp.
   5  *
   6  * Author: Sarah Sharp
   7  * Some code borrowed from the Linux EHCI driver.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  * for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/module.h>
  26 #include <linux/acpi.h>
  27
  28 #include "xhci.h"
  29 #include "xhci-trace.h"
  30
  31 #define PORT2_SSIC_CONFIG_REG2  0x883c
  32 #define PROG_DONE               (1 << 30)
  33 #define SSIC_PORT_UNUSED        (1 << 31)
  34
  35 /* Device for a quirk */
  36 #define PCI_VENDOR_ID_FRESCO_LOGIC      0x1b73
  37 #define PCI_DEVICE_ID_FRESCO_LOGIC_PDK  0x1000
  38 #define PCI_DEVICE_ID_FRESCO_LOGIC_FL1400       0x1400
  39
  40 #define PCI_VENDOR_ID_ETRON             0x1b6f
  41 #define PCI_DEVICE_ID_EJ168             0x7023
  42
  43 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_XHCI      0x8c31
  44 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI   0x9c31
  45 #define PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI             0x22b5
  46 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI         0xa12f
  47 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI        0x9d2f
  48
  49 static const char hcd_name[] = "xhci_hcd";
  50
  51 static struct hc_driver __read_mostly xhci_pci_hc_driver;
  52
  53 static int xhci_pci_setup(struct usb_hcd *hcd);
  54
  55 static const struct xhci_driver_overrides xhci_pci_overrides __initconst = {
  56         .extra_priv_size = sizeof(struct xhci_hcd),
  57         .reset = xhci_pci_setup,
  58 };
  59
  60 /* called after powerup, by probe or system-pm "wakeup" */
  61 static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
  62 {
  63         /*
  64          * TODO: Implement finding debug ports later.
  65          * TODO: see if there are any quirks that need to be added to handle
  66          * new extended capabilities.
  67          */
  68
  69         /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
  70         if (!pci_set_mwi(pdev))
  71                 xhci_dbg(xhci, "MWI active\n");
  72
  73         xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
  74         return 0;
  75 }
  76
  77 static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
  78 {
  79         struct pci_dev          *pdev = to_pci_dev(dev);
  80
  81         /* Look for vendor-specific quirks */
  82         if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
  83                         (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK ||
  84                          pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1400)) {
  85                 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
  86                                 pdev->revision == 0x0) {
  87                         xhci->quirks |= XHCI_RESET_EP_QUIRK;
  88                         xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
  89                                 "QUIRK: Fresco Logic xHC needs configure"
  90                                 " endpoint cmd after reset endpoint");
  91                 }
  92                 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
  93                                 pdev->revision == 0x4) {
  94                         xhci->quirks |= XHCI_SLOW_SUSPEND;
  95                         xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
  96                                 "QUIRK: Fresco Logic xHC revision %u"
  97                                 "must be suspended extra slowly",
  98                                 pdev->revision);
  99                 }
 100                 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK)
 101                         xhci->quirks |= XHCI_BROKEN_STREAMS;
 102                 /* Fresco Logic confirms: all revisions of this chip do not
 103                  * support MSI, even though some of them claim to in their PCI
 104                  * capabilities.
 105                  */
 106                 xhci->quirks |= XHCI_BROKEN_MSI;
 107                 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
 108                                 "QUIRK: Fresco Logic revision %u "
 109                                 "has broken MSI implementation",
 110                                 pdev->revision);
 111                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 112         }
 113
 114         if (pdev->vendor == PCI_VENDOR_ID_NEC)
 115                 xhci->quirks |= XHCI_NEC_HOST;
 116
 117         if (pdev->vendor == PCI_VENDOR_ID_AMD && xhci->hci_version == 0x96)
 118                 xhci->quirks |= XHCI_AMD_0x96_HOST;
 119
 120         /* AMD PLL quirk */
 121         if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info())
 122                 xhci->quirks |= XHCI_AMD_PLL_FIX;
 123
 124         if (pdev->vendor == PCI_VENDOR_ID_AMD)
 125                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 126
 127         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
 128                 xhci->quirks |= XHCI_LPM_SUPPORT;
 129                 xhci->quirks |= XHCI_INTEL_HOST;
 130                 xhci->quirks |= XHCI_AVOID_BEI;
 131         }
 132         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 133                         pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) {
 134                 xhci->quirks |= XHCI_EP_LIMIT_QUIRK;
 135                 xhci->limit_active_eps = 64;
 136                 xhci->quirks |= XHCI_SW_BW_CHECKING;
 137                 /*
 138                  * PPT desktop boards DH77EB and DH77DF will power back on after
 139                  * a few seconds of being shutdown.  The fix for this is to
 140                  * switch the ports from xHCI to EHCI on shutdown.  We can't use
 141                  * DMI information to find those particular boards (since each
 142                  * vendor will change the board name), so we have to key off all
 143                  * PPT chipsets.
 144                  */
 145                 xhci->quirks |= XHCI_SPURIOUS_REBOOT;
 146         }
 147         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 148                 pdev->device == PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI) {
 149                 xhci->quirks |= XHCI_SPURIOUS_REBOOT;
 150                 xhci->quirks |= XHCI_SPURIOUS_WAKEUP;
 151         }
 152         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 153                 (pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
 154                  pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI ||
 155                  pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI)) {
 156                 xhci->quirks |= XHCI_PME_STUCK_QUIRK;
 157         }
 158         if (pdev->vendor == PCI_VENDOR_ID_ETRON &&
 159                         pdev->device == PCI_DEVICE_ID_EJ168) {
 160                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 161                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 162                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 163         }
 164         if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
 165                         pdev->device == 0x0015)
 166                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 167         if (pdev->vendor == PCI_VENDOR_ID_VIA)
 168                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 169
 170         /* See https://bugzilla.kernel.org/show_bug.cgi?id=79511 */
 171         if (pdev->vendor == PCI_VENDOR_ID_VIA &&
 172                         pdev->device == 0x3432)
 173                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 174
 175         if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
 176                         pdev->device == 0x1042)
 177                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 178
 179         if (xhci->quirks & XHCI_RESET_ON_RESUME)
 180                 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
 181                                 "QUIRK: Resetting on resume");
 182 }
 183
 184 #ifdef CONFIG_ACPI
 185 static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
 186 {
 187         static const u8 intel_dsm_uuid[] = {
 188                 0xb7, 0x0c, 0x34, 0xac, 0x01, 0xe9, 0xbf, 0x45,
 189                 0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23,
 190         };
 191         acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), intel_dsm_uuid, 3, 1, NULL);
 192 }
 193 #else
 194         static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev) { }
 195 #endif /* CONFIG_ACPI */
 196
 197 /* called during probe() after chip reset completes */
 198 static int xhci_pci_setup(struct usb_hcd *hcd)
 199 {
 200         struct xhci_hcd         *xhci;
 201         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 202         int                     retval;
 203
 204         retval = xhci_gen_setup(hcd, xhci_pci_quirks);
 205         if (retval)
 206                 return retval;
 207
 208         xhci = hcd_to_xhci(hcd);
 209         if (!usb_hcd_is_primary_hcd(hcd))
 210                 return 0;
 211
 212         pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
 213         xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
 214
 215         /* Find any debug ports */
 216         retval = xhci_pci_reinit(xhci, pdev);
 217         if (!retval)
 218                 return retval;
 219
 220         return retval;
 221 }
 222
 223 /*
 224  * We need to register our own PCI probe function (instead of the USB core's
 225  * function) in order to create a second roothub under xHCI.
 226  */
 227 static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 228 {
 229         int retval;
 230         struct xhci_hcd *xhci;
 231         struct hc_driver *driver;
 232         struct usb_hcd *hcd;
 233
 234         driver = (struct hc_driver *)id->driver_data;
 235
 236         /* Prevent runtime suspending between USB-2 and USB-3 initialization */
 237         pm_runtime_get_noresume(&dev->dev);
 238
 239         /* Register the USB 2.0 roothub.
 240          * FIXME: USB core must know to register the USB 2.0 roothub first.
 241          * This is sort of silly, because we could just set the HCD driver flags
 242          * to say USB 2.0, but I'm not sure what the implications would be in
 243          * the other parts of the HCD code.
 244          */
 245         retval = usb_hcd_pci_probe(dev, id);
 246
 247         if (retval)
 248                 goto put_runtime_pm;
 249
 250         /* USB 2.0 roothub is stored in the PCI device now. */
 251         hcd = dev_get_drvdata(&dev->dev);
 252         xhci = hcd_to_xhci(hcd);
 253         xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev,
 254                                 pci_name(dev), hcd);
 255         if (!xhci->shared_hcd) {
 256                 retval = -ENOMEM;
 257                 goto dealloc_usb2_hcd;
 258         }
 259
 260         retval = usb_add_hcd(xhci->shared_hcd, dev->irq,
 261                         IRQF_SHARED);
 262         if (retval)
 263                 goto put_usb3_hcd;
 264         /* Roothub already marked as USB 3.0 speed */
 265
 266         if (!(xhci->quirks & XHCI_BROKEN_STREAMS) &&
 267                         HCC_MAX_PSA(xhci->hcc_params) >= 4)
 268                 xhci->shared_hcd->can_do_streams = 1;
 269
 270         if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
 271                 xhci_pme_acpi_rtd3_enable(dev);
 272
 273         /* USB-2 and USB-3 roothubs initialized, allow runtime pm suspend */
 274         pm_runtime_put_noidle(&dev->dev);
 275
 276         return 0;
 277
 278 put_usb3_hcd:
 279         usb_put_hcd(xhci->shared_hcd);
 280 dealloc_usb2_hcd:
 281         usb_hcd_pci_remove(dev);
 282 put_runtime_pm:
 283         pm_runtime_put_noidle(&dev->dev);
 284         return retval;
 285 }
 286
 287 static void xhci_pci_remove(struct pci_dev *dev)
 288 {
 289         struct xhci_hcd *xhci;
 290
 291         xhci = hcd_to_xhci(pci_get_drvdata(dev));
 292         if (xhci->shared_hcd) {
 293                 usb_remove_hcd(xhci->shared_hcd);
 294                 usb_put_hcd(xhci->shared_hcd);
 295         }
 296         usb_hcd_pci_remove(dev);
 297
 298         /* Workaround for spurious wakeups at shutdown with HSW */
 299         if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
 300                 pci_set_power_state(dev, PCI_D3hot);
 301 }
 302
 303 #ifdef CONFIG_PM
 304 /*
 305  * In some Intel xHCI controllers, in order to get D3 working,
 306  * through a vendor specific SSIC CONFIG register at offset 0x883c,
 307  * SSIC PORT need to be marked as "unused" before putting xHCI
 308  * into D3. After D3 exit, the SSIC port need to be marked as "used".
 309  * Without this change, xHCI might not enter D3 state.
 310  * Make sure PME works on some Intel xHCI controllers by writing 1 to clear
 311  * the Internal PME flag bit in vendor specific PMCTRL register at offset 0x80a4
 312  */
 313 static void xhci_pme_quirk(struct usb_hcd *hcd, bool suspend)
 314 {
 315         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 316         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 317         u32 val;
 318         void __iomem *reg;
 319
 320         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 321                  pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI) {
 322
 323                 reg = (void __iomem *) xhci->cap_regs + PORT2_SSIC_CONFIG_REG2;
 324
 325                 /* Notify SSIC that SSIC profile programming is not done */
 326                 val = readl(reg) & ~PROG_DONE;
 327                 writel(val, reg);
 328
 329                 /* Mark SSIC port as unused(suspend) or used(resume) */
 330                 val = readl(reg);
 331                 if (suspend)
 332                         val |= SSIC_PORT_UNUSED;
 333                 else
 334                         val &= ~SSIC_PORT_UNUSED;
 335                 writel(val, reg);
 336
 337                 /* Notify SSIC that SSIC profile programming is done */
 338                 val = readl(reg) | PROG_DONE;
 339                 writel(val, reg);
 340                 readl(reg);
 341         }
 342
 343         reg = (void __iomem *) xhci->cap_regs + 0x80a4;
 344         val = readl(reg);
 345         writel(val | BIT(28), reg);
 346         readl(reg);
 347 }
 348
 349 static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
 350 {
 351         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 352         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 353
 354         /*
 355          * Systems with the TI redriver that loses port status change events
 356          * need to have the registers polled during D3, so avoid D3cold.
 357          */
 358         if (xhci->quirks & XHCI_COMP_MODE_QUIRK)
 359                 pdev->no_d3cold = true;
 360
 361         if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
 362                 xhci_pme_quirk(hcd, true);
 363
 364         return xhci_suspend(xhci, do_wakeup);
 365 }
 366
 367 static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 368 {
 369         struct xhci_hcd         *xhci = hcd_to_xhci(hcd);
 370         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 371         int                     retval = 0;
 372
 373         /* The BIOS on systems with the Intel Panther Point chipset may or may
 374          * not support xHCI natively.  That means that during system resume, it
 375          * may switch the ports back to EHCI so that users can use their
 376          * keyboard to select a kernel from GRUB after resume from hibernate.
 377          *
 378          * The BIOS is supposed to remember whether the OS had xHCI ports
 379          * enabled before resume, and switch the ports back to xHCI when the
 380          * BIOS/OS semaphore is written, but we all know we can't trust BIOS
 381          * writers.
 382          *
 383          * Unconditionally switch the ports back to xHCI after a system resume.
 384          * It should not matter whether the EHCI or xHCI controller is
 385          * resumed first. It's enough to do the switchover in xHCI because
 386          * USB core won't notice anything as the hub driver doesn't start
 387          * running again until after all the devices (including both EHCI and
 388          * xHCI host controllers) have been resumed.
 389          */
 390
 391         if (pdev->vendor == PCI_VENDOR_ID_INTEL)
 392                 usb_enable_intel_xhci_ports(pdev);
 393
 394         if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
 395                 xhci_pme_quirk(hcd, false);
 396
 397         retval = xhci_resume(xhci, hibernated);
 398         return retval;
 399 }
 400 #endif /* CONFIG_PM */
 401
 402 /*-------------------------------------------------------------------------*/
 403
 404 /* PCI driver selection metadata; PCI hotplugging uses this */
 405 static const struct pci_device_id pci_ids[] = { {
 406         /* handle any USB 3.0 xHCI controller */
 407         PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
 408         .driver_data =  (unsigned long) &xhci_pci_hc_driver,
 409         },
 410         { /* end: all zeroes */ }
 411 };
 412 MODULE_DEVICE_TABLE(pci, pci_ids);
 413
 414 /* pci driver glue; this is a "new style" PCI driver module */
 415 static struct pci_driver xhci_pci_driver = {
 416         .name =         (char *) hcd_name,
 417         .id_table =     pci_ids,
 418
 419         .probe =        xhci_pci_probe,
 420         .remove =       xhci_pci_remove,
 421         /* suspend and resume implemented later */
 422
 423         .shutdown =     usb_hcd_pci_shutdown,
 424 #ifdef CONFIG_PM
 425         .driver = {
 426                 .pm = &usb_hcd_pci_pm_ops
 427         },
 428 #endif
 429 };
 430
 431 static int __init xhci_pci_init(void)
 432 {
 433         xhci_init_driver(&xhci_pci_hc_driver, &xhci_pci_overrides);
 434 #ifdef CONFIG_PM
 435         xhci_pci_hc_driver.pci_suspend = xhci_pci_suspend;
 436         xhci_pci_hc_driver.pci_resume = xhci_pci_resume;
 437 #endif
 438         return pci_register_driver(&xhci_pci_driver);
 439 }
 440 module_init(xhci_pci_init);
 441
 442 static void __exit xhci_pci_exit(void)
 443 {
 444         pci_unregister_driver(&xhci_pci_driver);
 445 }
 446 module_exit(xhci_pci_exit);
 447
 448 MODULE_DESCRIPTION("xHCI PCI Host Controller Driver");
 449 MODULE_LICENSE("GPL");