1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * This file contains code to reset and initialize USB host controllers. 4 * Some of it includes work-arounds for PCI hardware and BIOS quirks. 5 * It may need to run early during booting -- before USB would normally 6 * initialize -- to ensure that Linux doesn't use any legacy modes. 7 * 8 * Copyright (c) 1999 Martin Mares <mj@ucw.cz> 9 * (and others) 10 */ 11 12 #include <linux/types.h> 13 #include <linux/kernel.h> 14 #include <linux/pci.h> 15 #include <linux/delay.h> 16 #include <linux/export.h> 17 #include <linux/acpi.h> 18 #include <linux/dmi.h> 19 #include "pci-quirks.h" 20 #include "xhci-ext-caps.h" 21 22 23 #define UHCI_USBLEGSUP 0xc0 /* legacy support */ 24 #define UHCI_USBCMD 0 /* command register */ 25 #define UHCI_USBINTR 4 /* interrupt register */ 26 #define UHCI_USBLEGSUP_RWC 0x8f00 /* the R/WC bits */ 27 #define UHCI_USBLEGSUP_RO 0x5040 /* R/O and reserved bits */ 28 #define UHCI_USBCMD_RUN 0x0001 /* RUN/STOP bit */ 29 #define UHCI_USBCMD_HCRESET 0x0002 /* Host Controller reset */ 30 #define UHCI_USBCMD_EGSM 0x0008 /* Global Suspend Mode */ 31 #define UHCI_USBCMD_CONFIGURE 0x0040 /* Config Flag */ 32 #define UHCI_USBINTR_RESUME 0x0002 /* Resume interrupt enable */ 33 34 #define OHCI_CONTROL 0x04 35 #define OHCI_CMDSTATUS 0x08 36 #define OHCI_INTRSTATUS 0x0c 37 #define OHCI_INTRENABLE 0x10 38 #define OHCI_INTRDISABLE 0x14 39 #define OHCI_FMINTERVAL 0x34 40 #define OHCI_HCFS (3 << 6) /* hc functional state */ 41 #define OHCI_HCR (1 << 0) /* host controller reset */ 42 #define OHCI_OCR (1 << 3) /* ownership change request */ 43 #define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */ 44 #define OHCI_CTRL_IR (1 << 8) /* interrupt routing */ 45 #define OHCI_INTR_OC (1 << 30) /* ownership change */ 46 47 #define EHCI_HCC_PARAMS 0x08 /* extended capabilities */ 48 #define EHCI_USBCMD 0 /* command register */ 49 #define EHCI_USBCMD_RUN (1 << 0) /* RUN/STOP bit */ 50 #define EHCI_USBSTS 4 /* status register */ 51 #define EHCI_USBSTS_HALTED (1 << 12) /* HCHalted bit */ 52 #define EHCI_USBINTR 8 /* interrupt register */ 53 #define EHCI_CONFIGFLAG 0x40 /* configured flag register */ 54 #define EHCI_USBLEGSUP 0 /* legacy support register */ 55 #define EHCI_USBLEGSUP_BIOS (1 << 16) /* BIOS semaphore */ 56 #define EHCI_USBLEGSUP_OS (1 << 24) /* OS semaphore */ 57 #define EHCI_USBLEGCTLSTS 4 /* legacy control/status */ 58 #define EHCI_USBLEGCTLSTS_SOOE (1 << 13) /* SMI on ownership change */ 59 60 /* AMD quirk use */ 61 #define AB_REG_BAR_LOW 0xe0 62 #define AB_REG_BAR_HIGH 0xe1 63 #define AB_REG_BAR_SB700 0xf0 64 #define AB_INDX(addr) ((addr) + 0x00) 65 #define AB_DATA(addr) ((addr) + 0x04) 66 #define AX_INDXC 0x30 67 #define AX_DATAC 0x34 68 69 #define PT_ADDR_INDX 0xE8 70 #define PT_READ_INDX 0xE4 71 #define PT_SIG_1_ADDR 0xA520 72 #define PT_SIG_2_ADDR 0xA521 73 #define PT_SIG_3_ADDR 0xA522 74 #define PT_SIG_4_ADDR 0xA523 75 #define PT_SIG_1_DATA 0x78 76 #define PT_SIG_2_DATA 0x56 77 #define PT_SIG_3_DATA 0x34 78 #define PT_SIG_4_DATA 0x12 79 #define PT4_P1_REG 0xB521 80 #define PT4_P2_REG 0xB522 81 #define PT2_P1_REG 0xD520 82 #define PT2_P2_REG 0xD521 83 #define PT1_P1_REG 0xD522 84 #define PT1_P2_REG 0xD523 85 86 #define NB_PCIE_INDX_ADDR 0xe0 87 #define NB_PCIE_INDX_DATA 0xe4 88 #define PCIE_P_CNTL 0x10040 89 #define BIF_NB 0x10002 90 #define NB_PIF0_PWRDOWN_0 0x01100012 91 #define NB_PIF0_PWRDOWN_1 0x01100013 92 93 #define USB_INTEL_XUSB2PR 0xD0 94 #define USB_INTEL_USB2PRM 0xD4 95 #define USB_INTEL_USB3_PSSEN 0xD8 96 #define USB_INTEL_USB3PRM 0xDC 97 98 /* ASMEDIA quirk use */ 99 #define ASMT_DATA_WRITE0_REG 0xF8 100 #define ASMT_DATA_WRITE1_REG 0xFC 101 #define ASMT_CONTROL_REG 0xE0 102 #define ASMT_CONTROL_WRITE_BIT 0x02 103 #define ASMT_WRITEREG_CMD 0x10423 104 #define ASMT_FLOWCTL_ADDR 0xFA30 105 #define ASMT_FLOWCTL_DATA 0xBA 106 #define ASMT_PSEUDO_DATA 0 107 108 /* 109 * amd_chipset_gen values represent AMD different chipset generations 110 */ 111 enum amd_chipset_gen { 112 NOT_AMD_CHIPSET = 0, 113 AMD_CHIPSET_SB600, 114 AMD_CHIPSET_SB700, 115 AMD_CHIPSET_SB800, 116 AMD_CHIPSET_HUDSON2, 117 AMD_CHIPSET_BOLTON, 118 AMD_CHIPSET_YANGTZE, 119 AMD_CHIPSET_TAISHAN, 120 AMD_CHIPSET_UNKNOWN, 121 }; 122 123 struct amd_chipset_type { 124 enum amd_chipset_gen gen; 125 u8 rev; 126 }; 127 128 static struct amd_chipset_info { 129 struct pci_dev *nb_dev; 130 struct pci_dev *smbus_dev; 131 int nb_type; 132 struct amd_chipset_type sb_type; 133 int isoc_reqs; 134 int probe_count; 135 bool need_pll_quirk; 136 } amd_chipset; 137 138 static DEFINE_SPINLOCK(amd_lock); 139 140 /* 141 * amd_chipset_sb_type_init - initialize amd chipset southbridge type 142 * 143 * AMD FCH/SB generation and revision is identified by SMBus controller 144 * vendor, device and revision IDs. 145 * 146 * Returns: 1 if it is an AMD chipset, 0 otherwise. 147 */ 148 static int amd_chipset_sb_type_init(struct amd_chipset_info *pinfo) 149 { 150 u8 rev = 0; 151 pinfo->sb_type.gen = AMD_CHIPSET_UNKNOWN; 152 153 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 154 PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL); 155 if (pinfo->smbus_dev) { 156 rev = pinfo->smbus_dev->revision; 157 if (rev >= 0x10 && rev <= 0x1f) 158 pinfo->sb_type.gen = AMD_CHIPSET_SB600; 159 else if (rev >= 0x30 && rev <= 0x3f) 160 pinfo->sb_type.gen = AMD_CHIPSET_SB700; 161 else if (rev >= 0x40 && rev <= 0x4f) 162 pinfo->sb_type.gen = AMD_CHIPSET_SB800; 163 } else { 164 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD, 165 PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL); 166 167 if (pinfo->smbus_dev) { 168 rev = pinfo->smbus_dev->revision; 169 if (rev >= 0x11 && rev <= 0x14) 170 pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2; 171 else if (rev >= 0x15 && rev <= 0x18) 172 pinfo->sb_type.gen = AMD_CHIPSET_BOLTON; 173 else if (rev >= 0x39 && rev <= 0x3a) 174 pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE; 175 } else { 176 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD, 177 0x145c, NULL); 178 if (pinfo->smbus_dev) { 179 rev = pinfo->smbus_dev->revision; 180 pinfo->sb_type.gen = AMD_CHIPSET_TAISHAN; 181 } else { 182 pinfo->sb_type.gen = NOT_AMD_CHIPSET; 183 return 0; 184 } 185 } 186 } 187 pinfo->sb_type.rev = rev; 188 return 1; 189 } 190 191 void sb800_prefetch(struct device *dev, int on) 192 { 193 u16 misc; 194 struct pci_dev *pdev = to_pci_dev(dev); 195 196 pci_read_config_word(pdev, 0x50, &misc); 197 if (on == 0) 198 pci_write_config_word(pdev, 0x50, misc & 0xfcff); 199 else 200 pci_write_config_word(pdev, 0x50, misc | 0x0300); 201 } 202 EXPORT_SYMBOL_GPL(sb800_prefetch); 203 204 static void usb_amd_find_chipset_info(void) 205 { 206 unsigned long flags; 207 struct amd_chipset_info info; 208 info.need_pll_quirk = 0; 209 210 spin_lock_irqsave(&amd_lock, flags); 211 212 /* probe only once */ 213 if (amd_chipset.probe_count > 0) { 214 amd_chipset.probe_count++; 215 spin_unlock_irqrestore(&amd_lock, flags); 216 return; 217 } 218 memset(&info, 0, sizeof(info)); 219 spin_unlock_irqrestore(&amd_lock, flags); 220 221 if (!amd_chipset_sb_type_init(&info)) { 222 goto commit; 223 } 224 225 switch (info.sb_type.gen) { 226 case AMD_CHIPSET_SB700: 227 info.need_pll_quirk = info.sb_type.rev <= 0x3B; 228 break; 229 case AMD_CHIPSET_SB800: 230 case AMD_CHIPSET_HUDSON2: 231 case AMD_CHIPSET_BOLTON: 232 info.need_pll_quirk = 1; 233 break; 234 default: 235 info.need_pll_quirk = 0; 236 break; 237 } 238 239 if (!info.need_pll_quirk) { 240 if (info.smbus_dev) { 241 pci_dev_put(info.smbus_dev); 242 info.smbus_dev = NULL; 243 } 244 goto commit; 245 } 246 247 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9601, NULL); 248 if (info.nb_dev) { 249 info.nb_type = 1; 250 } else { 251 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL); 252 if (info.nb_dev) { 253 info.nb_type = 2; 254 } else { 255 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 256 0x9600, NULL); 257 if (info.nb_dev) 258 info.nb_type = 3; 259 } 260 } 261 262 printk(KERN_DEBUG "QUIRK: Enable AMD PLL fix\n"); 263 264 commit: 265 266 spin_lock_irqsave(&amd_lock, flags); 267 if (amd_chipset.probe_count > 0) { 268 /* race - someone else was faster - drop devices */ 269 270 /* Mark that we where here */ 271 amd_chipset.probe_count++; 272 273 spin_unlock_irqrestore(&amd_lock, flags); 274 275 pci_dev_put(info.nb_dev); 276 pci_dev_put(info.smbus_dev); 277 278 } else { 279 /* no race - commit the result */ 280 info.probe_count++; 281 amd_chipset = info; 282 spin_unlock_irqrestore(&amd_lock, flags); 283 } 284 } 285 286 int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev) 287 { 288 /* Make sure amd chipset type has already been initialized */ 289 usb_amd_find_chipset_info(); 290 if (amd_chipset.sb_type.gen == AMD_CHIPSET_YANGTZE || 291 amd_chipset.sb_type.gen == AMD_CHIPSET_TAISHAN) { 292 dev_dbg(&pdev->dev, "QUIRK: Enable AMD remote wakeup fix\n"); 293 return 1; 294 } 295 return 0; 296 } 297 EXPORT_SYMBOL_GPL(usb_hcd_amd_remote_wakeup_quirk); 298 299 bool usb_amd_hang_symptom_quirk(void) 300 { 301 u8 rev; 302 303 usb_amd_find_chipset_info(); 304 rev = amd_chipset.sb_type.rev; 305 /* SB600 and old version of SB700 have hang symptom bug */ 306 return amd_chipset.sb_type.gen == AMD_CHIPSET_SB600 || 307 (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 && 308 rev >= 0x3a && rev <= 0x3b); 309 } 310 EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk); 311 312 bool usb_amd_prefetch_quirk(void) 313 { 314 usb_amd_find_chipset_info(); 315 /* SB800 needs pre-fetch fix */ 316 return amd_chipset.sb_type.gen == AMD_CHIPSET_SB800; 317 } 318 EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk); 319 320 bool usb_amd_quirk_pll_check(void) 321 { 322 usb_amd_find_chipset_info(); 323 return amd_chipset.need_pll_quirk; 324 } 325 EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_check); 326 327 /* 328 * The hardware normally enables the A-link power management feature, which 329 * lets the system lower the power consumption in idle states. 330 * 331 * This USB quirk prevents the link going into that lower power state 332 * during isochronous transfers. 333 * 334 * Without this quirk, isochronous stream on OHCI/EHCI/xHCI controllers of 335 * some AMD platforms may stutter or have breaks occasionally. 336 */ 337 static void usb_amd_quirk_pll(int disable) 338 { 339 u32 addr, addr_low, addr_high, val; 340 u32 bit = disable ? 0 : 1; 341 unsigned long flags; 342 343 spin_lock_irqsave(&amd_lock, flags); 344 345 if (disable) { 346 amd_chipset.isoc_reqs++; 347 if (amd_chipset.isoc_reqs > 1) { 348 spin_unlock_irqrestore(&amd_lock, flags); 349 return; 350 } 351 } else { 352 amd_chipset.isoc_reqs--; 353 if (amd_chipset.isoc_reqs > 0) { 354 spin_unlock_irqrestore(&amd_lock, flags); 355 return; 356 } 357 } 358 359 if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB800 || 360 amd_chipset.sb_type.gen == AMD_CHIPSET_HUDSON2 || 361 amd_chipset.sb_type.gen == AMD_CHIPSET_BOLTON) { 362 outb_p(AB_REG_BAR_LOW, 0xcd6); 363 addr_low = inb_p(0xcd7); 364 outb_p(AB_REG_BAR_HIGH, 0xcd6); 365 addr_high = inb_p(0xcd7); 366 addr = addr_high << 8 | addr_low; 367 368 outl_p(0x30, AB_INDX(addr)); 369 outl_p(0x40, AB_DATA(addr)); 370 outl_p(0x34, AB_INDX(addr)); 371 val = inl_p(AB_DATA(addr)); 372 } else if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 && 373 amd_chipset.sb_type.rev <= 0x3b) { 374 pci_read_config_dword(amd_chipset.smbus_dev, 375 AB_REG_BAR_SB700, &addr); 376 outl(AX_INDXC, AB_INDX(addr)); 377 outl(0x40, AB_DATA(addr)); 378 outl(AX_DATAC, AB_INDX(addr)); 379 val = inl(AB_DATA(addr)); 380 } else { 381 spin_unlock_irqrestore(&amd_lock, flags); 382 return; 383 } 384 385 if (disable) { 386 val &= ~0x08; 387 val |= (1 << 4) | (1 << 9); 388 } else { 389 val |= 0x08; 390 val &= ~((1 << 4) | (1 << 9)); 391 } 392 outl_p(val, AB_DATA(addr)); 393 394 if (!amd_chipset.nb_dev) { 395 spin_unlock_irqrestore(&amd_lock, flags); 396 return; 397 } 398 399 if (amd_chipset.nb_type == 1 || amd_chipset.nb_type == 3) { 400 addr = PCIE_P_CNTL; 401 pci_write_config_dword(amd_chipset.nb_dev, 402 NB_PCIE_INDX_ADDR, addr); 403 pci_read_config_dword(amd_chipset.nb_dev, 404 NB_PCIE_INDX_DATA, &val); 405 406 val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12)); 407 val |= bit | (bit << 3) | (bit << 12); 408 val |= ((!bit) << 4) | ((!bit) << 9); 409 pci_write_config_dword(amd_chipset.nb_dev, 410 NB_PCIE_INDX_DATA, val); 411 412 addr = BIF_NB; 413 pci_write_config_dword(amd_chipset.nb_dev, 414 NB_PCIE_INDX_ADDR, addr); 415 pci_read_config_dword(amd_chipset.nb_dev, 416 NB_PCIE_INDX_DATA, &val); 417 val &= ~(1 << 8); 418 val |= bit << 8; 419 420 pci_write_config_dword(amd_chipset.nb_dev, 421 NB_PCIE_INDX_DATA, val); 422 } else if (amd_chipset.nb_type == 2) { 423 addr = NB_PIF0_PWRDOWN_0; 424 pci_write_config_dword(amd_chipset.nb_dev, 425 NB_PCIE_INDX_ADDR, addr); 426 pci_read_config_dword(amd_chipset.nb_dev, 427 NB_PCIE_INDX_DATA, &val); 428 if (disable) 429 val &= ~(0x3f << 7); 430 else 431 val |= 0x3f << 7; 432 433 pci_write_config_dword(amd_chipset.nb_dev, 434 NB_PCIE_INDX_DATA, val); 435 436 addr = NB_PIF0_PWRDOWN_1; 437 pci_write_config_dword(amd_chipset.nb_dev, 438 NB_PCIE_INDX_ADDR, addr); 439 pci_read_config_dword(amd_chipset.nb_dev, 440 NB_PCIE_INDX_DATA, &val); 441 if (disable) 442 val &= ~(0x3f << 7); 443 else 444 val |= 0x3f << 7; 445 446 pci_write_config_dword(amd_chipset.nb_dev, 447 NB_PCIE_INDX_DATA, val); 448 } 449 450 spin_unlock_irqrestore(&amd_lock, flags); 451 return; 452 } 453 454 void usb_amd_quirk_pll_disable(void) 455 { 456 usb_amd_quirk_pll(1); 457 } 458 EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_disable); 459 460 static int usb_asmedia_wait_write(struct pci_dev *pdev) 461 { 462 unsigned long retry_count; 463 unsigned char value; 464 465 for (retry_count = 1000; retry_count > 0; --retry_count) { 466 467 pci_read_config_byte(pdev, ASMT_CONTROL_REG, &value); 468 469 if (value == 0xff) { 470 dev_err(&pdev->dev, "%s: check_ready ERROR", __func__); 471 return -EIO; 472 } 473 474 if ((value & ASMT_CONTROL_WRITE_BIT) == 0) 475 return 0; 476 477 udelay(50); 478 } 479 480 dev_warn(&pdev->dev, "%s: check_write_ready timeout", __func__); 481 return -ETIMEDOUT; 482 } 483 484 void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev) 485 { 486 if (usb_asmedia_wait_write(pdev) != 0) 487 return; 488 489 /* send command and address to device */ 490 pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_WRITEREG_CMD); 491 pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_FLOWCTL_ADDR); 492 pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT); 493 494 if (usb_asmedia_wait_write(pdev) != 0) 495 return; 496 497 /* send data to device */ 498 pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_FLOWCTL_DATA); 499 pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_PSEUDO_DATA); 500 pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT); 501 } 502 EXPORT_SYMBOL_GPL(usb_asmedia_modifyflowcontrol); 503 504 void usb_amd_quirk_pll_enable(void) 505 { 506 usb_amd_quirk_pll(0); 507 } 508 EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_enable); 509 510 void usb_amd_dev_put(void) 511 { 512 struct pci_dev *nb, *smbus; 513 unsigned long flags; 514 515 spin_lock_irqsave(&amd_lock, flags); 516 517 amd_chipset.probe_count--; 518 if (amd_chipset.probe_count > 0) { 519 spin_unlock_irqrestore(&amd_lock, flags); 520 return; 521 } 522 523 /* save them to pci_dev_put outside of spinlock */ 524 nb = amd_chipset.nb_dev; 525 smbus = amd_chipset.smbus_dev; 526 527 amd_chipset.nb_dev = NULL; 528 amd_chipset.smbus_dev = NULL; 529 amd_chipset.nb_type = 0; 530 memset(&amd_chipset.sb_type, 0, sizeof(amd_chipset.sb_type)); 531 amd_chipset.isoc_reqs = 0; 532 amd_chipset.need_pll_quirk = 0; 533 534 spin_unlock_irqrestore(&amd_lock, flags); 535 536 pci_dev_put(nb); 537 pci_dev_put(smbus); 538 } 539 EXPORT_SYMBOL_GPL(usb_amd_dev_put); 540 541 /* 542 * Check if port is disabled in BIOS on AMD Promontory host. 543 * BIOS Disabled ports may wake on connect/disconnect and need 544 * driver workaround to keep them disabled. 545 * Returns true if port is marked disabled. 546 */ 547 bool usb_amd_pt_check_port(struct device *device, int port) 548 { 549 unsigned char value, port_shift; 550 struct pci_dev *pdev; 551 u16 reg; 552 553 pdev = to_pci_dev(device); 554 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_1_ADDR); 555 556 pci_read_config_byte(pdev, PT_READ_INDX, &value); 557 if (value != PT_SIG_1_DATA) 558 return false; 559 560 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_2_ADDR); 561 562 pci_read_config_byte(pdev, PT_READ_INDX, &value); 563 if (value != PT_SIG_2_DATA) 564 return false; 565 566 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_3_ADDR); 567 568 pci_read_config_byte(pdev, PT_READ_INDX, &value); 569 if (value != PT_SIG_3_DATA) 570 return false; 571 572 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_4_ADDR); 573 574 pci_read_config_byte(pdev, PT_READ_INDX, &value); 575 if (value != PT_SIG_4_DATA) 576 return false; 577 578 /* Check disabled port setting, if bit is set port is enabled */ 579 switch (pdev->device) { 580 case 0x43b9: 581 case 0x43ba: 582 /* 583 * device is AMD_PROMONTORYA_4(0x43b9) or PROMONTORYA_3(0x43ba) 584 * PT4_P1_REG bits[7..1] represents USB2.0 ports 6 to 0 585 * PT4_P2_REG bits[6..0] represents ports 13 to 7 586 */ 587 if (port > 6) { 588 reg = PT4_P2_REG; 589 port_shift = port - 7; 590 } else { 591 reg = PT4_P1_REG; 592 port_shift = port + 1; 593 } 594 break; 595 case 0x43bb: 596 /* 597 * device is AMD_PROMONTORYA_2(0x43bb) 598 * PT2_P1_REG bits[7..5] represents USB2.0 ports 2 to 0 599 * PT2_P2_REG bits[5..0] represents ports 9 to 3 600 */ 601 if (port > 2) { 602 reg = PT2_P2_REG; 603 port_shift = port - 3; 604 } else { 605 reg = PT2_P1_REG; 606 port_shift = port + 5; 607 } 608 break; 609 case 0x43bc: 610 /* 611 * device is AMD_PROMONTORYA_1(0x43bc) 612 * PT1_P1_REG[7..4] represents USB2.0 ports 3 to 0 613 * PT1_P2_REG[5..0] represents ports 9 to 4 614 */ 615 if (port > 3) { 616 reg = PT1_P2_REG; 617 port_shift = port - 4; 618 } else { 619 reg = PT1_P1_REG; 620 port_shift = port + 4; 621 } 622 break; 623 default: 624 return false; 625 } 626 pci_write_config_word(pdev, PT_ADDR_INDX, reg); 627 pci_read_config_byte(pdev, PT_READ_INDX, &value); 628 629 return !(value & BIT(port_shift)); 630 } 631 EXPORT_SYMBOL_GPL(usb_amd_pt_check_port); 632 633 /* 634 * Make sure the controller is completely inactive, unable to 635 * generate interrupts or do DMA. 636 */ 637 void uhci_reset_hc(struct pci_dev *pdev, unsigned long base) 638 { 639 /* Turn off PIRQ enable and SMI enable. (This also turns off the 640 * BIOS's USB Legacy Support.) Turn off all the R/WC bits too. 641 */ 642 pci_write_config_word(pdev, UHCI_USBLEGSUP, UHCI_USBLEGSUP_RWC); 643 644 /* Reset the HC - this will force us to get a 645 * new notification of any already connected 646 * ports due to the virtual disconnect that it 647 * implies. 648 */ 649 outw(UHCI_USBCMD_HCRESET, base + UHCI_USBCMD); 650 mb(); 651 udelay(5); 652 if (inw(base + UHCI_USBCMD) & UHCI_USBCMD_HCRESET) 653 dev_warn(&pdev->dev, "HCRESET not completed yet!\n"); 654 655 /* Just to be safe, disable interrupt requests and 656 * make sure the controller is stopped. 657 */ 658 outw(0, base + UHCI_USBINTR); 659 outw(0, base + UHCI_USBCMD); 660 } 661 EXPORT_SYMBOL_GPL(uhci_reset_hc); 662 663 /* 664 * Initialize a controller that was newly discovered or has just been 665 * resumed. In either case we can't be sure of its previous state. 666 * 667 * Returns: 1 if the controller was reset, 0 otherwise. 668 */ 669 int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base) 670 { 671 u16 legsup; 672 unsigned int cmd, intr; 673 674 /* 675 * When restarting a suspended controller, we expect all the 676 * settings to be the same as we left them: 677 * 678 * PIRQ and SMI disabled, no R/W bits set in USBLEGSUP; 679 * Controller is stopped and configured with EGSM set; 680 * No interrupts enabled except possibly Resume Detect. 681 * 682 * If any of these conditions are violated we do a complete reset. 683 */ 684 pci_read_config_word(pdev, UHCI_USBLEGSUP, &legsup); 685 if (legsup & ~(UHCI_USBLEGSUP_RO | UHCI_USBLEGSUP_RWC)) { 686 dev_dbg(&pdev->dev, "%s: legsup = 0x%04x\n", 687 __func__, legsup); 688 goto reset_needed; 689 } 690 691 cmd = inw(base + UHCI_USBCMD); 692 if ((cmd & UHCI_USBCMD_RUN) || !(cmd & UHCI_USBCMD_CONFIGURE) || 693 !(cmd & UHCI_USBCMD_EGSM)) { 694 dev_dbg(&pdev->dev, "%s: cmd = 0x%04x\n", 695 __func__, cmd); 696 goto reset_needed; 697 } 698 699 intr = inw(base + UHCI_USBINTR); 700 if (intr & (~UHCI_USBINTR_RESUME)) { 701 dev_dbg(&pdev->dev, "%s: intr = 0x%04x\n", 702 __func__, intr); 703 goto reset_needed; 704 } 705 return 0; 706 707 reset_needed: 708 dev_dbg(&pdev->dev, "Performing full reset\n"); 709 uhci_reset_hc(pdev, base); 710 return 1; 711 } 712 EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc); 713 714 static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask) 715 { 716 u16 cmd; 717 return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask); 718 } 719 720 #define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO) 721 #define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY) 722 723 static void quirk_usb_handoff_uhci(struct pci_dev *pdev) 724 { 725 unsigned long base = 0; 726 int i; 727 728 if (!pio_enabled(pdev)) 729 return; 730 731 for (i = 0; i < PCI_STD_NUM_BARS; i++) 732 if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) { 733 base = pci_resource_start(pdev, i); 734 break; 735 } 736 737 if (base) 738 uhci_check_and_reset_hc(pdev, base); 739 } 740 741 static int mmio_resource_enabled(struct pci_dev *pdev, int idx) 742 { 743 return pci_resource_start(pdev, idx) && mmio_enabled(pdev); 744 } 745 746 static void quirk_usb_handoff_ohci(struct pci_dev *pdev) 747 { 748 void __iomem *base; 749 u32 control; 750 u32 fminterval = 0; 751 bool no_fminterval = false; 752 int cnt; 753 754 if (!mmio_resource_enabled(pdev, 0)) 755 return; 756 757 base = pci_ioremap_bar(pdev, 0); 758 if (base == NULL) 759 return; 760 761 /* 762 * ULi M5237 OHCI controller locks the whole system when accessing 763 * the OHCI_FMINTERVAL offset. 764 */ 765 if (pdev->vendor == PCI_VENDOR_ID_AL && pdev->device == 0x5237) 766 no_fminterval = true; 767 768 control = readl(base + OHCI_CONTROL); 769 770 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */ 771 #ifdef __hppa__ 772 #define OHCI_CTRL_MASK (OHCI_CTRL_RWC | OHCI_CTRL_IR) 773 #else 774 #define OHCI_CTRL_MASK OHCI_CTRL_RWC 775 776 if (control & OHCI_CTRL_IR) { 777 int wait_time = 500; /* arbitrary; 5 seconds */ 778 writel(OHCI_INTR_OC, base + OHCI_INTRENABLE); 779 writel(OHCI_OCR, base + OHCI_CMDSTATUS); 780 while (wait_time > 0 && 781 readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) { 782 wait_time -= 10; 783 msleep(10); 784 } 785 if (wait_time <= 0) 786 dev_warn(&pdev->dev, 787 "OHCI: BIOS handoff failed (BIOS bug?) %08x\n", 788 readl(base + OHCI_CONTROL)); 789 } 790 #endif 791 792 /* disable interrupts */ 793 writel((u32) ~0, base + OHCI_INTRDISABLE); 794 795 /* Go into the USB_RESET state, preserving RWC (and possibly IR) */ 796 writel(control & OHCI_CTRL_MASK, base + OHCI_CONTROL); 797 readl(base + OHCI_CONTROL); 798 799 /* software reset of the controller, preserving HcFmInterval */ 800 if (!no_fminterval) 801 fminterval = readl(base + OHCI_FMINTERVAL); 802 803 writel(OHCI_HCR, base + OHCI_CMDSTATUS); 804 805 /* reset requires max 10 us delay */ 806 for (cnt = 30; cnt > 0; --cnt) { /* ... allow extra time */ 807 if ((readl(base + OHCI_CMDSTATUS) & OHCI_HCR) == 0) 808 break; 809 udelay(1); 810 } 811 812 if (!no_fminterval) 813 writel(fminterval, base + OHCI_FMINTERVAL); 814 815 /* Now the controller is safely in SUSPEND and nothing can wake it up */ 816 iounmap(base); 817 } 818 819 static const struct dmi_system_id ehci_dmi_nohandoff_table[] = { 820 { 821 /* Pegatron Lucid (ExoPC) */ 822 .matches = { 823 DMI_MATCH(DMI_BOARD_NAME, "EXOPG06411"), 824 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-CE-133"), 825 }, 826 }, 827 { 828 /* Pegatron Lucid (Ordissimo AIRIS) */ 829 .matches = { 830 DMI_MATCH(DMI_BOARD_NAME, "M11JB"), 831 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"), 832 }, 833 }, 834 { 835 /* Pegatron Lucid (Ordissimo) */ 836 .matches = { 837 DMI_MATCH(DMI_BOARD_NAME, "Ordissimo"), 838 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"), 839 }, 840 }, 841 { 842 /* HASEE E200 */ 843 .matches = { 844 DMI_MATCH(DMI_BOARD_VENDOR, "HASEE"), 845 DMI_MATCH(DMI_BOARD_NAME, "E210"), 846 DMI_MATCH(DMI_BIOS_VERSION, "6.00"), 847 }, 848 }, 849 { } 850 }; 851 852 static void ehci_bios_handoff(struct pci_dev *pdev, 853 void __iomem *op_reg_base, 854 u32 cap, u8 offset) 855 { 856 int try_handoff = 1, tried_handoff = 0; 857 858 /* 859 * The Pegatron Lucid tablet sporadically waits for 98 seconds trying 860 * the handoff on its unused controller. Skip it. 861 * 862 * The HASEE E200 hangs when the semaphore is set (bugzilla #77021). 863 */ 864 if (pdev->vendor == 0x8086 && (pdev->device == 0x283a || 865 pdev->device == 0x27cc)) { 866 if (dmi_check_system(ehci_dmi_nohandoff_table)) 867 try_handoff = 0; 868 } 869 870 if (try_handoff && (cap & EHCI_USBLEGSUP_BIOS)) { 871 dev_dbg(&pdev->dev, "EHCI: BIOS handoff\n"); 872 873 #if 0 874 /* aleksey_gorelov@phoenix.com reports that some systems need SMI forced on, 875 * but that seems dubious in general (the BIOS left it off intentionally) 876 * and is known to prevent some systems from booting. so we won't do this 877 * unless maybe we can determine when we're on a system that needs SMI forced. 878 */ 879 /* BIOS workaround (?): be sure the pre-Linux code 880 * receives the SMI 881 */ 882 pci_read_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, &val); 883 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 884 val | EHCI_USBLEGCTLSTS_SOOE); 885 #endif 886 887 /* some systems get upset if this semaphore is 888 * set for any other reason than forcing a BIOS 889 * handoff.. 890 */ 891 pci_write_config_byte(pdev, offset + 3, 1); 892 } 893 894 /* if boot firmware now owns EHCI, spin till it hands it over. */ 895 if (try_handoff) { 896 int msec = 1000; 897 while ((cap & EHCI_USBLEGSUP_BIOS) && (msec > 0)) { 898 tried_handoff = 1; 899 msleep(10); 900 msec -= 10; 901 pci_read_config_dword(pdev, offset, &cap); 902 } 903 } 904 905 if (cap & EHCI_USBLEGSUP_BIOS) { 906 /* well, possibly buggy BIOS... try to shut it down, 907 * and hope nothing goes too wrong 908 */ 909 if (try_handoff) 910 dev_warn(&pdev->dev, 911 "EHCI: BIOS handoff failed (BIOS bug?) %08x\n", 912 cap); 913 pci_write_config_byte(pdev, offset + 2, 0); 914 } 915 916 /* just in case, always disable EHCI SMIs */ 917 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 0); 918 919 /* If the BIOS ever owned the controller then we can't expect 920 * any power sessions to remain intact. 921 */ 922 if (tried_handoff) 923 writel(0, op_reg_base + EHCI_CONFIGFLAG); 924 } 925 926 static void quirk_usb_disable_ehci(struct pci_dev *pdev) 927 { 928 void __iomem *base, *op_reg_base; 929 u32 hcc_params, cap, val; 930 u8 offset, cap_length; 931 int wait_time, count = 256/4; 932 933 if (!mmio_resource_enabled(pdev, 0)) 934 return; 935 936 base = pci_ioremap_bar(pdev, 0); 937 if (base == NULL) 938 return; 939 940 cap_length = readb(base); 941 op_reg_base = base + cap_length; 942 943 /* EHCI 0.96 and later may have "extended capabilities" 944 * spec section 5.1 explains the bios handoff, e.g. for 945 * booting from USB disk or using a usb keyboard 946 */ 947 hcc_params = readl(base + EHCI_HCC_PARAMS); 948 offset = (hcc_params >> 8) & 0xff; 949 while (offset && --count) { 950 pci_read_config_dword(pdev, offset, &cap); 951 952 switch (cap & 0xff) { 953 case 1: 954 ehci_bios_handoff(pdev, op_reg_base, cap, offset); 955 break; 956 case 0: /* Illegal reserved cap, set cap=0 so we exit */ 957 cap = 0; /* fall through */ 958 default: 959 dev_warn(&pdev->dev, 960 "EHCI: unrecognized capability %02x\n", 961 cap & 0xff); 962 } 963 offset = (cap >> 8) & 0xff; 964 } 965 if (!count) 966 dev_printk(KERN_DEBUG, &pdev->dev, "EHCI: capability loop?\n"); 967 968 /* 969 * halt EHCI & disable its interrupts in any case 970 */ 971 val = readl(op_reg_base + EHCI_USBSTS); 972 if ((val & EHCI_USBSTS_HALTED) == 0) { 973 val = readl(op_reg_base + EHCI_USBCMD); 974 val &= ~EHCI_USBCMD_RUN; 975 writel(val, op_reg_base + EHCI_USBCMD); 976 977 wait_time = 2000; 978 do { 979 writel(0x3f, op_reg_base + EHCI_USBSTS); 980 udelay(100); 981 wait_time -= 100; 982 val = readl(op_reg_base + EHCI_USBSTS); 983 if ((val == ~(u32)0) || (val & EHCI_USBSTS_HALTED)) { 984 break; 985 } 986 } while (wait_time > 0); 987 } 988 writel(0, op_reg_base + EHCI_USBINTR); 989 writel(0x3f, op_reg_base + EHCI_USBSTS); 990 991 iounmap(base); 992 } 993 994 /* 995 * handshake - spin reading a register until handshake completes 996 * @ptr: address of hc register to be read 997 * @mask: bits to look at in result of read 998 * @done: value of those bits when handshake succeeds 999 * @wait_usec: timeout in microseconds 1000 * @delay_usec: delay in microseconds to wait between polling 1001 * 1002 * Polls a register every delay_usec microseconds. 1003 * Returns 0 when the mask bits have the value done. 1004 * Returns -ETIMEDOUT if this condition is not true after 1005 * wait_usec microseconds have passed. 1006 */ 1007 static int handshake(void __iomem *ptr, u32 mask, u32 done, 1008 int wait_usec, int delay_usec) 1009 { 1010 u32 result; 1011 1012 do { 1013 result = readl(ptr); 1014 result &= mask; 1015 if (result == done) 1016 return 0; 1017 udelay(delay_usec); 1018 wait_usec -= delay_usec; 1019 } while (wait_usec > 0); 1020 return -ETIMEDOUT; 1021 } 1022 1023 /* 1024 * Intel's Panther Point chipset has two host controllers (EHCI and xHCI) that 1025 * share some number of ports. These ports can be switched between either 1026 * controller. Not all of the ports under the EHCI host controller may be 1027 * switchable. 1028 * 1029 * The ports should be switched over to xHCI before PCI probes for any device 1030 * start. This avoids active devices under EHCI being disconnected during the 1031 * port switchover, which could cause loss of data on USB storage devices, or 1032 * failed boot when the root file system is on a USB mass storage device and is 1033 * enumerated under EHCI first. 1034 * 1035 * We write into the xHC's PCI configuration space in some Intel-specific 1036 * registers to switch the ports over. The USB 3.0 terminations and the USB 1037 * 2.0 data wires are switched separately. We want to enable the SuperSpeed 1038 * terminations before switching the USB 2.0 wires over, so that USB 3.0 1039 * devices connect at SuperSpeed, rather than at USB 2.0 speeds. 1040 */ 1041 void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev) 1042 { 1043 u32 ports_available; 1044 bool ehci_found = false; 1045 struct pci_dev *companion = NULL; 1046 1047 /* Sony VAIO t-series with subsystem device ID 90a8 is not capable of 1048 * switching ports from EHCI to xHCI 1049 */ 1050 if (xhci_pdev->subsystem_vendor == PCI_VENDOR_ID_SONY && 1051 xhci_pdev->subsystem_device == 0x90a8) 1052 return; 1053 1054 /* make sure an intel EHCI controller exists */ 1055 for_each_pci_dev(companion) { 1056 if (companion->class == PCI_CLASS_SERIAL_USB_EHCI && 1057 companion->vendor == PCI_VENDOR_ID_INTEL) { 1058 ehci_found = true; 1059 break; 1060 } 1061 } 1062 1063 if (!ehci_found) 1064 return; 1065 1066 /* Don't switchover the ports if the user hasn't compiled the xHCI 1067 * driver. Otherwise they will see "dead" USB ports that don't power 1068 * the devices. 1069 */ 1070 if (!IS_ENABLED(CONFIG_USB_XHCI_HCD)) { 1071 dev_warn(&xhci_pdev->dev, 1072 "CONFIG_USB_XHCI_HCD is turned off, defaulting to EHCI.\n"); 1073 dev_warn(&xhci_pdev->dev, 1074 "USB 3.0 devices will work at USB 2.0 speeds.\n"); 1075 usb_disable_xhci_ports(xhci_pdev); 1076 return; 1077 } 1078 1079 /* Read USB3PRM, the USB 3.0 Port Routing Mask Register 1080 * Indicate the ports that can be changed from OS. 1081 */ 1082 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3PRM, 1083 &ports_available); 1084 1085 dev_dbg(&xhci_pdev->dev, "Configurable ports to enable SuperSpeed: 0x%x\n", 1086 ports_available); 1087 1088 /* Write USB3_PSSEN, the USB 3.0 Port SuperSpeed Enable 1089 * Register, to turn on SuperSpeed terminations for the 1090 * switchable ports. 1091 */ 1092 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 1093 ports_available); 1094 1095 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 1096 &ports_available); 1097 dev_dbg(&xhci_pdev->dev, 1098 "USB 3.0 ports that are now enabled under xHCI: 0x%x\n", 1099 ports_available); 1100 1101 /* Read XUSB2PRM, xHCI USB 2.0 Port Routing Mask Register 1102 * Indicate the USB 2.0 ports to be controlled by the xHCI host. 1103 */ 1104 1105 pci_read_config_dword(xhci_pdev, USB_INTEL_USB2PRM, 1106 &ports_available); 1107 1108 dev_dbg(&xhci_pdev->dev, "Configurable USB 2.0 ports to hand over to xCHI: 0x%x\n", 1109 ports_available); 1110 1111 /* Write XUSB2PR, the xHC USB 2.0 Port Routing Register, to 1112 * switch the USB 2.0 power and data lines over to the xHCI 1113 * host. 1114 */ 1115 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 1116 ports_available); 1117 1118 pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 1119 &ports_available); 1120 dev_dbg(&xhci_pdev->dev, 1121 "USB 2.0 ports that are now switched over to xHCI: 0x%x\n", 1122 ports_available); 1123 } 1124 EXPORT_SYMBOL_GPL(usb_enable_intel_xhci_ports); 1125 1126 void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) 1127 { 1128 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 0x0); 1129 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 0x0); 1130 } 1131 EXPORT_SYMBOL_GPL(usb_disable_xhci_ports); 1132 1133 /** 1134 * PCI Quirks for xHCI. 1135 * 1136 * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS. 1137 * It signals to the BIOS that the OS wants control of the host controller, 1138 * and then waits 1 second for the BIOS to hand over control. 1139 * If we timeout, assume the BIOS is broken and take control anyway. 1140 */ 1141 static void quirk_usb_handoff_xhci(struct pci_dev *pdev) 1142 { 1143 void __iomem *base; 1144 int ext_cap_offset; 1145 void __iomem *op_reg_base; 1146 u32 val; 1147 int timeout; 1148 int len = pci_resource_len(pdev, 0); 1149 1150 if (!mmio_resource_enabled(pdev, 0)) 1151 return; 1152 1153 base = ioremap(pci_resource_start(pdev, 0), len); 1154 if (base == NULL) 1155 return; 1156 1157 /* 1158 * Find the Legacy Support Capability register - 1159 * this is optional for xHCI host controllers. 1160 */ 1161 ext_cap_offset = xhci_find_next_ext_cap(base, 0, XHCI_EXT_CAPS_LEGACY); 1162 1163 if (!ext_cap_offset) 1164 goto hc_init; 1165 1166 if ((ext_cap_offset + sizeof(val)) > len) { 1167 /* We're reading garbage from the controller */ 1168 dev_warn(&pdev->dev, "xHCI controller failing to respond"); 1169 goto iounmap; 1170 } 1171 val = readl(base + ext_cap_offset); 1172 1173 /* Auto handoff never worked for these devices. Force it and continue */ 1174 if ((pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241) || 1175 (pdev->vendor == PCI_VENDOR_ID_RENESAS 1176 && pdev->device == 0x0014)) { 1177 val = (val | XHCI_HC_OS_OWNED) & ~XHCI_HC_BIOS_OWNED; 1178 writel(val, base + ext_cap_offset); 1179 } 1180 1181 /* If the BIOS owns the HC, signal that the OS wants it, and wait */ 1182 if (val & XHCI_HC_BIOS_OWNED) { 1183 writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset); 1184 1185 /* Wait for 1 second with 10 microsecond polling interval */ 1186 timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED, 1187 0, 1000000, 10); 1188 1189 /* Assume a buggy BIOS and take HC ownership anyway */ 1190 if (timeout) { 1191 dev_warn(&pdev->dev, 1192 "xHCI BIOS handoff failed (BIOS bug ?) %08x\n", 1193 val); 1194 writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset); 1195 } 1196 } 1197 1198 val = readl(base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); 1199 /* Mask off (turn off) any enabled SMIs */ 1200 val &= XHCI_LEGACY_DISABLE_SMI; 1201 /* Mask all SMI events bits, RW1C */ 1202 val |= XHCI_LEGACY_SMI_EVENTS; 1203 /* Disable any BIOS SMIs and clear all SMI events*/ 1204 writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); 1205 1206 hc_init: 1207 if (pdev->vendor == PCI_VENDOR_ID_INTEL) 1208 usb_enable_intel_xhci_ports(pdev); 1209 1210 op_reg_base = base + XHCI_HC_LENGTH(readl(base)); 1211 1212 /* Wait for the host controller to be ready before writing any 1213 * operational or runtime registers. Wait 5 seconds and no more. 1214 */ 1215 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0, 1216 5000000, 10); 1217 /* Assume a buggy HC and start HC initialization anyway */ 1218 if (timeout) { 1219 val = readl(op_reg_base + XHCI_STS_OFFSET); 1220 dev_warn(&pdev->dev, 1221 "xHCI HW not ready after 5 sec (HC bug?) status = 0x%x\n", 1222 val); 1223 } 1224 1225 /* Send the halt and disable interrupts command */ 1226 val = readl(op_reg_base + XHCI_CMD_OFFSET); 1227 val &= ~(XHCI_CMD_RUN | XHCI_IRQS); 1228 writel(val, op_reg_base + XHCI_CMD_OFFSET); 1229 1230 /* Wait for the HC to halt - poll every 125 usec (one microframe). */ 1231 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1, 1232 XHCI_MAX_HALT_USEC, 125); 1233 if (timeout) { 1234 val = readl(op_reg_base + XHCI_STS_OFFSET); 1235 dev_warn(&pdev->dev, 1236 "xHCI HW did not halt within %d usec status = 0x%x\n", 1237 XHCI_MAX_HALT_USEC, val); 1238 } 1239 1240 iounmap: 1241 iounmap(base); 1242 } 1243 1244 static void quirk_usb_early_handoff(struct pci_dev *pdev) 1245 { 1246 /* Skip Netlogic mips SoC's internal PCI USB controller. 1247 * This device does not need/support EHCI/OHCI handoff 1248 */ 1249 if (pdev->vendor == 0x184e) /* vendor Netlogic */ 1250 return; 1251 if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI && 1252 pdev->class != PCI_CLASS_SERIAL_USB_OHCI && 1253 pdev->class != PCI_CLASS_SERIAL_USB_EHCI && 1254 pdev->class != PCI_CLASS_SERIAL_USB_XHCI) 1255 return; 1256 1257 if (pci_enable_device(pdev) < 0) { 1258 dev_warn(&pdev->dev, 1259 "Can't enable PCI device, BIOS handoff failed.\n"); 1260 return; 1261 } 1262 if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI) 1263 quirk_usb_handoff_uhci(pdev); 1264 else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI) 1265 quirk_usb_handoff_ohci(pdev); 1266 else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI) 1267 quirk_usb_disable_ehci(pdev); 1268 else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI) 1269 quirk_usb_handoff_xhci(pdev); 1270 pci_disable_device(pdev); 1271 } 1272 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, 1273 PCI_CLASS_SERIAL_USB, 8, quirk_usb_early_handoff); 1274