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         }
 151         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 152                 (pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
 153                  pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI ||
 154                  pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI)) {
 155                 xhci->quirks |= XHCI_PME_STUCK_QUIRK;
 156         }
 157         if (pdev->vendor == PCI_VENDOR_ID_ETRON &&
 158                         pdev->device == PCI_DEVICE_ID_EJ168) {
 159                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 160                 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 161                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 162         }
 163         if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
 164                         pdev->device == 0x0015)
 165                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 166         if (pdev->vendor == PCI_VENDOR_ID_VIA)
 167                 xhci->quirks |= XHCI_RESET_ON_RESUME;
 168
 169         /* See https://bugzilla.kernel.org/show_bug.cgi?id=79511 */
 170         if (pdev->vendor == PCI_VENDOR_ID_VIA &&
 171                         pdev->device == 0x3432)
 172                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 173
 174         if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
 175                         pdev->device == 0x1042)
 176                 xhci->quirks |= XHCI_BROKEN_STREAMS;
 177
 178         if (xhci->quirks & XHCI_RESET_ON_RESUME)
 179                 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
 180                                 "QUIRK: Resetting on resume");
 181 }
 182
 183 /*
 184  * In some Intel xHCI controllers, in order to get D3 working,
 185  * through a vendor specific SSIC CONFIG register at offset 0x883c,
 186  * SSIC PORT need to be marked as "unused" before putting xHCI
 187  * into D3. After D3 exit, the SSIC port need to be marked as "used".
 188  * Without this change, xHCI might not enter D3 state.
 189  * Make sure PME works on some Intel xHCI controllers by writing 1 to clear
 190  * the Internal PME flag bit in vendor specific PMCTRL register at offset 0x80a4
 191  */
 192 static void xhci_pme_quirk(struct usb_hcd *hcd, bool suspend)
 193 {
 194         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 195         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 196         u32 val;
 197         void __iomem *reg;
 198
 199         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 200                  pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI) {
 201
 202                 reg = (void __iomem *) xhci->cap_regs + PORT2_SSIC_CONFIG_REG2;
 203
 204                 /* Notify SSIC that SSIC profile programming is not done */
 205                 val = readl(reg) & ~PROG_DONE;
 206                 writel(val, reg);
 207
 208                 /* Mark SSIC port as unused(suspend) or used(resume) */
 209                 val = readl(reg);
 210                 if (suspend)
 211                         val |= SSIC_PORT_UNUSED;
 212                 else
 213                         val &= ~SSIC_PORT_UNUSED;
 214                 writel(val, reg);
 215
 216                 /* Notify SSIC that SSIC profile programming is done */
 217                 val = readl(reg) | PROG_DONE;
 218                 writel(val, reg);
 219                 readl(reg);
 220         }
 221
 222         reg = (void __iomem *) xhci->cap_regs + 0x80a4;
 223         val = readl(reg);
 224         writel(val | BIT(28), reg);
 225         readl(reg);
 226 }
 227
 228 #ifdef CONFIG_ACPI
 229 static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
 230 {
 231         static const u8 intel_dsm_uuid[] = {
 232                 0xb7, 0x0c, 0x34, 0xac, 0x01, 0xe9, 0xbf, 0x45,
 233                 0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23,
 234         };
 235         acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), intel_dsm_uuid, 3, 1, NULL);
 236 }
 237 #else
 238         static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev) { }
 239 #endif /* CONFIG_ACPI */
 240
 241 /* called during probe() after chip reset completes */
 242 static int xhci_pci_setup(struct usb_hcd *hcd)
 243 {
 244         struct xhci_hcd         *xhci;
 245         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 246         int                     retval;
 247
 248         retval = xhci_gen_setup(hcd, xhci_pci_quirks);
 249         if (retval)
 250                 return retval;
 251
 252         xhci = hcd_to_xhci(hcd);
 253         if (!usb_hcd_is_primary_hcd(hcd))
 254                 return 0;
 255
 256         pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
 257         xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
 258
 259         /* Find any debug ports */
 260         retval = xhci_pci_reinit(xhci, pdev);
 261         if (!retval)
 262                 return retval;
 263
 264         return retval;
 265 }
 266
 267 /*
 268  * We need to register our own PCI probe function (instead of the USB core's
 269  * function) in order to create a second roothub under xHCI.
 270  */
 271 static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 272 {
 273         int retval;
 274         struct xhci_hcd *xhci;
 275         struct hc_driver *driver;
 276         struct usb_hcd *hcd;
 277
 278         driver = (struct hc_driver *)id->driver_data;
 279
 280         /* Prevent runtime suspending between USB-2 and USB-3 initialization */
 281         pm_runtime_get_noresume(&dev->dev);
 282
 283         /* Register the USB 2.0 roothub.
 284          * FIXME: USB core must know to register the USB 2.0 roothub first.
 285          * This is sort of silly, because we could just set the HCD driver flags
 286          * to say USB 2.0, but I'm not sure what the implications would be in
 287          * the other parts of the HCD code.
 288          */
 289         retval = usb_hcd_pci_probe(dev, id);
 290
 291         if (retval)
 292                 goto put_runtime_pm;
 293
 294         /* USB 2.0 roothub is stored in the PCI device now. */
 295         hcd = dev_get_drvdata(&dev->dev);
 296         xhci = hcd_to_xhci(hcd);
 297         xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev,
 298                                 pci_name(dev), hcd);
 299         if (!xhci->shared_hcd) {
 300                 retval = -ENOMEM;
 301                 goto dealloc_usb2_hcd;
 302         }
 303
 304         retval = usb_add_hcd(xhci->shared_hcd, dev->irq,
 305                         IRQF_SHARED);
 306         if (retval)
 307                 goto put_usb3_hcd;
 308         /* Roothub already marked as USB 3.0 speed */
 309
 310         if (!(xhci->quirks & XHCI_BROKEN_STREAMS) &&
 311                         HCC_MAX_PSA(xhci->hcc_params) >= 4)
 312                 xhci->shared_hcd->can_do_streams = 1;
 313
 314         if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
 315                 xhci_pme_acpi_rtd3_enable(dev);
 316
 317         /* USB-2 and USB-3 roothubs initialized, allow runtime pm suspend */
 318         pm_runtime_put_noidle(&dev->dev);
 319
 320         return 0;
 321
 322 put_usb3_hcd:
 323         usb_put_hcd(xhci->shared_hcd);
 324 dealloc_usb2_hcd:
 325         usb_hcd_pci_remove(dev);
 326 put_runtime_pm:
 327         pm_runtime_put_noidle(&dev->dev);
 328         return retval;
 329 }
 330
 331 static void xhci_pci_remove(struct pci_dev *dev)
 332 {
 333         struct xhci_hcd *xhci;
 334
 335         xhci = hcd_to_xhci(pci_get_drvdata(dev));
 336         if (xhci->shared_hcd) {
 337                 usb_remove_hcd(xhci->shared_hcd);
 338                 usb_put_hcd(xhci->shared_hcd);
 339         }
 340         usb_hcd_pci_remove(dev);
 341
 342         /* Workaround for spurious wakeups at shutdown with HSW */
 343         if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
 344                 pci_set_power_state(dev, PCI_D3hot);
 345 }
 346
 347 #ifdef CONFIG_PM
 348 static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
 349 {
 350         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 351         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 352
 353         /*
 354          * Systems with the TI redriver that loses port status change events
 355          * need to have the registers polled during D3, so avoid D3cold.
 356          */
 357         if (xhci->quirks & XHCI_COMP_MODE_QUIRK)
 358                 pdev->no_d3cold = true;
 359
 360         if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
 361                 xhci_pme_quirk(hcd, true);
 362
 363         return xhci_suspend(xhci, do_wakeup);
 364 }
 365
 366 static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 367 {
 368         struct xhci_hcd         *xhci = hcd_to_xhci(hcd);
 369         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
 370         int                     retval = 0;
 371
 372         /* The BIOS on systems with the Intel Panther Point chipset may or may
 373          * not support xHCI natively.  That means that during system resume, it
 374          * may switch the ports back to EHCI so that users can use their
 375          * keyboard to select a kernel from GRUB after resume from hibernate.
 376          *
 377          * The BIOS is supposed to remember whether the OS had xHCI ports
 378          * enabled before resume, and switch the ports back to xHCI when the
 379          * BIOS/OS semaphore is written, but we all know we can't trust BIOS
 380          * writers.
 381          *
 382          * Unconditionally switch the ports back to xHCI after a system resume.
 383          * It should not matter whether the EHCI or xHCI controller is
 384          * resumed first. It's enough to do the switchover in xHCI because
 385          * USB core won't notice anything as the hub driver doesn't start
 386          * running again until after all the devices (including both EHCI and
 387          * xHCI host controllers) have been resumed.
 388          */
 389
 390         if (pdev->vendor == PCI_VENDOR_ID_INTEL)
 391                 usb_enable_intel_xhci_ports(pdev);
 392
 393         if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
 394                 xhci_pme_quirk(hcd, false);
 395
 396         retval = xhci_resume(xhci, hibernated);
 397         return retval;
 398 }
 399 #endif /* CONFIG_PM */
 400
 401 /*-------------------------------------------------------------------------*/
 402
 403 /* PCI driver selection metadata; PCI hotplugging uses this */
 404 static const struct pci_device_id pci_ids[] = { {
 405         /* handle any USB 3.0 xHCI controller */
 406         PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
 407         .driver_data =  (unsigned long) &xhci_pci_hc_driver,
 408         },
 409         { /* end: all zeroes */ }
 410 };
 411 MODULE_DEVICE_TABLE(pci, pci_ids);
 412
 413 /* pci driver glue; this is a "new style" PCI driver module */
 414 static struct pci_driver xhci_pci_driver = {
 415         .name =         (char *) hcd_name,
 416         .id_table =     pci_ids,
 417
 418         .probe =        xhci_pci_probe,
 419         .remove =       xhci_pci_remove,
 420         /* suspend and resume implemented later */
 421
 422         .shutdown =     usb_hcd_pci_shutdown,
 423 #ifdef CONFIG_PM
 424         .driver = {
 425                 .pm = &usb_hcd_pci_pm_ops
 426         },
 427 #endif
 428 };
 429
 430 static int __init xhci_pci_init(void)
 431 {
 432         xhci_init_driver(&xhci_pci_hc_driver, &xhci_pci_overrides);
 433 #ifdef CONFIG_PM
 434         xhci_pci_hc_driver.pci_suspend = xhci_pci_suspend;
 435         xhci_pci_hc_driver.pci_resume = xhci_pci_resume;
 436 #endif
 437         return pci_register_driver(&xhci_pci_driver);
 438 }
 439 module_init(xhci_pci_init);
 440
 441 static void __exit xhci_pci_exit(void)
 442 {
 443         pci_unregister_driver(&xhci_pci_driver);
 444 }
 445 module_exit(xhci_pci_exit);
 446
 447 MODULE_DESCRIPTION("xHCI PCI Host Controller Driver");
 448 MODULE_LICENSE("GPL");