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 <linux/of.h> 20 #include <linux/iopoll.h> 21 22 #include "pci-quirks.h" 23 #include "xhci-ext-caps.h" 24 25 26 #define UHCI_USBLEGSUP 0xc0 /* legacy support */ 27 #define UHCI_USBCMD 0 /* command register */ 28 #define UHCI_USBINTR 4 /* interrupt register */ 29 #define UHCI_USBLEGSUP_RWC 0x8f00 /* the R/WC bits */ 30 #define UHCI_USBLEGSUP_RO 0x5040 /* R/O and reserved bits */ 31 #define UHCI_USBCMD_RUN 0x0001 /* RUN/STOP bit */ 32 #define UHCI_USBCMD_HCRESET 0x0002 /* Host Controller reset */ 33 #define UHCI_USBCMD_EGSM 0x0008 /* Global Suspend Mode */ 34 #define UHCI_USBCMD_CONFIGURE 0x0040 /* Config Flag */ 35 #define UHCI_USBINTR_RESUME 0x0002 /* Resume interrupt enable */ 36 37 #define OHCI_CONTROL 0x04 38 #define OHCI_CMDSTATUS 0x08 39 #define OHCI_INTRSTATUS 0x0c 40 #define OHCI_INTRENABLE 0x10 41 #define OHCI_INTRDISABLE 0x14 42 #define OHCI_FMINTERVAL 0x34 43 #define OHCI_HCFS (3 << 6) /* hc functional state */ 44 #define OHCI_HCR (1 << 0) /* host controller reset */ 45 #define OHCI_OCR (1 << 3) /* ownership change request */ 46 #define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */ 47 #define OHCI_CTRL_IR (1 << 8) /* interrupt routing */ 48 #define OHCI_INTR_OC (1 << 30) /* ownership change */ 49 50 #define EHCI_HCC_PARAMS 0x08 /* extended capabilities */ 51 #define EHCI_USBCMD 0 /* command register */ 52 #define EHCI_USBCMD_RUN (1 << 0) /* RUN/STOP bit */ 53 #define EHCI_USBSTS 4 /* status register */ 54 #define EHCI_USBSTS_HALTED (1 << 12) /* HCHalted bit */ 55 #define EHCI_USBINTR 8 /* interrupt register */ 56 #define EHCI_CONFIGFLAG 0x40 /* configured flag register */ 57 #define EHCI_USBLEGSUP 0 /* legacy support register */ 58 #define EHCI_USBLEGSUP_BIOS (1 << 16) /* BIOS semaphore */ 59 #define EHCI_USBLEGSUP_OS (1 << 24) /* OS semaphore */ 60 #define EHCI_USBLEGCTLSTS 4 /* legacy control/status */ 61 #define EHCI_USBLEGCTLSTS_SOOE (1 << 13) /* SMI on ownership change */ 62 63 /* ASMEDIA quirk use */ 64 #define ASMT_DATA_WRITE0_REG 0xF8 65 #define ASMT_DATA_WRITE1_REG 0xFC 66 #define ASMT_CONTROL_REG 0xE0 67 #define ASMT_CONTROL_WRITE_BIT 0x02 68 #define ASMT_WRITEREG_CMD 0x10423 69 #define ASMT_FLOWCTL_ADDR 0xFA30 70 #define ASMT_FLOWCTL_DATA 0xBA 71 #define ASMT_PSEUDO_DATA 0 72 73 /* Intel quirk use */ 74 #define USB_INTEL_XUSB2PR 0xD0 75 #define USB_INTEL_USB2PRM 0xD4 76 #define USB_INTEL_USB3_PSSEN 0xD8 77 #define USB_INTEL_USB3PRM 0xDC 78 79 #ifdef CONFIG_USB_PCI_AMD 80 /* AMD quirk use */ 81 #define AB_REG_BAR_LOW 0xe0 82 #define AB_REG_BAR_HIGH 0xe1 83 #define AB_REG_BAR_SB700 0xf0 84 #define AB_INDX(addr) ((addr) + 0x00) 85 #define AB_DATA(addr) ((addr) + 0x04) 86 #define AX_INDXC 0x30 87 #define AX_DATAC 0x34 88 89 #define PT_ADDR_INDX 0xE8 90 #define PT_READ_INDX 0xE4 91 #define PT_SIG_1_ADDR 0xA520 92 #define PT_SIG_2_ADDR 0xA521 93 #define PT_SIG_3_ADDR 0xA522 94 #define PT_SIG_4_ADDR 0xA523 95 #define PT_SIG_1_DATA 0x78 96 #define PT_SIG_2_DATA 0x56 97 #define PT_SIG_3_DATA 0x34 98 #define PT_SIG_4_DATA 0x12 99 #define PT4_P1_REG 0xB521 100 #define PT4_P2_REG 0xB522 101 #define PT2_P1_REG 0xD520 102 #define PT2_P2_REG 0xD521 103 #define PT1_P1_REG 0xD522 104 #define PT1_P2_REG 0xD523 105 106 #define NB_PCIE_INDX_ADDR 0xe0 107 #define NB_PCIE_INDX_DATA 0xe4 108 #define PCIE_P_CNTL 0x10040 109 #define BIF_NB 0x10002 110 #define NB_PIF0_PWRDOWN_0 0x01100012 111 #define NB_PIF0_PWRDOWN_1 0x01100013 112 113 /* 114 * amd_chipset_gen values represent AMD different chipset generations 115 */ 116 enum amd_chipset_gen { 117 NOT_AMD_CHIPSET = 0, 118 AMD_CHIPSET_SB600, 119 AMD_CHIPSET_SB700, 120 AMD_CHIPSET_SB800, 121 AMD_CHIPSET_HUDSON2, 122 AMD_CHIPSET_BOLTON, 123 AMD_CHIPSET_YANGTZE, 124 AMD_CHIPSET_TAISHAN, 125 AMD_CHIPSET_UNKNOWN, 126 }; 127 128 struct amd_chipset_type { 129 enum amd_chipset_gen gen; 130 u8 rev; 131 }; 132 133 static struct amd_chipset_info { 134 struct pci_dev *nb_dev; 135 struct pci_dev *smbus_dev; 136 int nb_type; 137 struct amd_chipset_type sb_type; 138 int isoc_reqs; 139 int probe_count; 140 bool need_pll_quirk; 141 } amd_chipset; 142 143 static DEFINE_SPINLOCK(amd_lock); 144 145 /* 146 * amd_chipset_sb_type_init - initialize amd chipset southbridge type 147 * 148 * AMD FCH/SB generation and revision is identified by SMBus controller 149 * vendor, device and revision IDs. 150 * 151 * Returns: 1 if it is an AMD chipset, 0 otherwise. 152 */ 153 static int amd_chipset_sb_type_init(struct amd_chipset_info *pinfo) 154 { 155 u8 rev = 0; 156 pinfo->sb_type.gen = AMD_CHIPSET_UNKNOWN; 157 158 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 159 PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL); 160 if (pinfo->smbus_dev) { 161 rev = pinfo->smbus_dev->revision; 162 if (rev >= 0x10 && rev <= 0x1f) 163 pinfo->sb_type.gen = AMD_CHIPSET_SB600; 164 else if (rev >= 0x30 && rev <= 0x3f) 165 pinfo->sb_type.gen = AMD_CHIPSET_SB700; 166 else if (rev >= 0x40 && rev <= 0x4f) 167 pinfo->sb_type.gen = AMD_CHIPSET_SB800; 168 } else { 169 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD, 170 PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL); 171 172 if (pinfo->smbus_dev) { 173 rev = pinfo->smbus_dev->revision; 174 if (rev >= 0x11 && rev <= 0x14) 175 pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2; 176 else if (rev >= 0x15 && rev <= 0x18) 177 pinfo->sb_type.gen = AMD_CHIPSET_BOLTON; 178 else if (rev >= 0x39 && rev <= 0x3a) 179 pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE; 180 } else { 181 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD, 182 0x145c, NULL); 183 if (pinfo->smbus_dev) { 184 rev = pinfo->smbus_dev->revision; 185 pinfo->sb_type.gen = AMD_CHIPSET_TAISHAN; 186 } else { 187 pinfo->sb_type.gen = NOT_AMD_CHIPSET; 188 return 0; 189 } 190 } 191 } 192 pinfo->sb_type.rev = rev; 193 return 1; 194 } 195 196 void sb800_prefetch(struct device *dev, int on) 197 { 198 u16 misc; 199 struct pci_dev *pdev = to_pci_dev(dev); 200 201 pci_read_config_word(pdev, 0x50, &misc); 202 if (on == 0) 203 pci_write_config_word(pdev, 0x50, misc & 0xfcff); 204 else 205 pci_write_config_word(pdev, 0x50, misc | 0x0300); 206 } 207 EXPORT_SYMBOL_GPL(sb800_prefetch); 208 209 static void usb_amd_find_chipset_info(void) 210 { 211 unsigned long flags; 212 struct amd_chipset_info info = { }; 213 214 spin_lock_irqsave(&amd_lock, flags); 215 216 /* probe only once */ 217 if (amd_chipset.probe_count > 0) { 218 amd_chipset.probe_count++; 219 spin_unlock_irqrestore(&amd_lock, flags); 220 return; 221 } 222 spin_unlock_irqrestore(&amd_lock, flags); 223 224 if (!amd_chipset_sb_type_init(&info)) { 225 goto commit; 226 } 227 228 switch (info.sb_type.gen) { 229 case AMD_CHIPSET_SB700: 230 info.need_pll_quirk = info.sb_type.rev <= 0x3B; 231 break; 232 case AMD_CHIPSET_SB800: 233 case AMD_CHIPSET_HUDSON2: 234 case AMD_CHIPSET_BOLTON: 235 info.need_pll_quirk = true; 236 break; 237 default: 238 info.need_pll_quirk = false; 239 break; 240 } 241 242 if (!info.need_pll_quirk) { 243 if (info.smbus_dev) { 244 pci_dev_put(info.smbus_dev); 245 info.smbus_dev = NULL; 246 } 247 goto commit; 248 } 249 250 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9601, NULL); 251 if (info.nb_dev) { 252 info.nb_type = 1; 253 } else { 254 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL); 255 if (info.nb_dev) { 256 info.nb_type = 2; 257 } else { 258 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 259 0x9600, NULL); 260 if (info.nb_dev) 261 info.nb_type = 3; 262 } 263 } 264 265 printk(KERN_DEBUG "QUIRK: Enable AMD PLL fix\n"); 266 267 commit: 268 269 spin_lock_irqsave(&amd_lock, flags); 270 if (amd_chipset.probe_count > 0) { 271 /* race - someone else was faster - drop devices */ 272 273 /* Mark that we where here */ 274 amd_chipset.probe_count++; 275 276 spin_unlock_irqrestore(&amd_lock, flags); 277 278 pci_dev_put(info.nb_dev); 279 pci_dev_put(info.smbus_dev); 280 281 } else { 282 /* no race - commit the result */ 283 info.probe_count++; 284 amd_chipset = info; 285 spin_unlock_irqrestore(&amd_lock, flags); 286 } 287 } 288 289 int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev) 290 { 291 /* Make sure amd chipset type has already been initialized */ 292 usb_amd_find_chipset_info(); 293 if (amd_chipset.sb_type.gen == AMD_CHIPSET_YANGTZE || 294 amd_chipset.sb_type.gen == AMD_CHIPSET_TAISHAN) { 295 dev_dbg(&pdev->dev, "QUIRK: Enable AMD remote wakeup fix\n"); 296 return 1; 297 } 298 return 0; 299 } 300 EXPORT_SYMBOL_GPL(usb_hcd_amd_remote_wakeup_quirk); 301 302 bool usb_amd_hang_symptom_quirk(void) 303 { 304 u8 rev; 305 306 usb_amd_find_chipset_info(); 307 rev = amd_chipset.sb_type.rev; 308 /* SB600 and old version of SB700 have hang symptom bug */ 309 return amd_chipset.sb_type.gen == AMD_CHIPSET_SB600 || 310 (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 && 311 rev >= 0x3a && rev <= 0x3b); 312 } 313 EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk); 314 315 bool usb_amd_prefetch_quirk(void) 316 { 317 usb_amd_find_chipset_info(); 318 /* SB800 needs pre-fetch fix */ 319 return amd_chipset.sb_type.gen == AMD_CHIPSET_SB800; 320 } 321 EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk); 322 323 bool usb_amd_quirk_pll_check(void) 324 { 325 usb_amd_find_chipset_info(); 326 return amd_chipset.need_pll_quirk; 327 } 328 EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_check); 329 330 /* 331 * The hardware normally enables the A-link power management feature, which 332 * lets the system lower the power consumption in idle states. 333 * 334 * This USB quirk prevents the link going into that lower power state 335 * during isochronous transfers. 336 * 337 * Without this quirk, isochronous stream on OHCI/EHCI/xHCI controllers of 338 * some AMD platforms may stutter or have breaks occasionally. 339 */ 340 static void usb_amd_quirk_pll(int disable) 341 { 342 u32 addr, addr_low, addr_high, val; 343 u32 bit = disable ? 0 : 1; 344 unsigned long flags; 345 346 spin_lock_irqsave(&amd_lock, flags); 347 348 if (disable) { 349 amd_chipset.isoc_reqs++; 350 if (amd_chipset.isoc_reqs > 1) { 351 spin_unlock_irqrestore(&amd_lock, flags); 352 return; 353 } 354 } else { 355 amd_chipset.isoc_reqs--; 356 if (amd_chipset.isoc_reqs > 0) { 357 spin_unlock_irqrestore(&amd_lock, flags); 358 return; 359 } 360 } 361 362 if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB800 || 363 amd_chipset.sb_type.gen == AMD_CHIPSET_HUDSON2 || 364 amd_chipset.sb_type.gen == AMD_CHIPSET_BOLTON) { 365 outb_p(AB_REG_BAR_LOW, 0xcd6); 366 addr_low = inb_p(0xcd7); 367 outb_p(AB_REG_BAR_HIGH, 0xcd6); 368 addr_high = inb_p(0xcd7); 369 addr = addr_high << 8 | addr_low; 370 371 outl_p(0x30, AB_INDX(addr)); 372 outl_p(0x40, AB_DATA(addr)); 373 outl_p(0x34, AB_INDX(addr)); 374 val = inl_p(AB_DATA(addr)); 375 } else if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 && 376 amd_chipset.sb_type.rev <= 0x3b) { 377 pci_read_config_dword(amd_chipset.smbus_dev, 378 AB_REG_BAR_SB700, &addr); 379 outl(AX_INDXC, AB_INDX(addr)); 380 outl(0x40, AB_DATA(addr)); 381 outl(AX_DATAC, AB_INDX(addr)); 382 val = inl(AB_DATA(addr)); 383 } else { 384 spin_unlock_irqrestore(&amd_lock, flags); 385 return; 386 } 387 388 if (disable) { 389 val &= ~0x08; 390 val |= (1 << 4) | (1 << 9); 391 } else { 392 val |= 0x08; 393 val &= ~((1 << 4) | (1 << 9)); 394 } 395 outl_p(val, AB_DATA(addr)); 396 397 if (!amd_chipset.nb_dev) { 398 spin_unlock_irqrestore(&amd_lock, flags); 399 return; 400 } 401 402 if (amd_chipset.nb_type == 1 || amd_chipset.nb_type == 3) { 403 addr = PCIE_P_CNTL; 404 pci_write_config_dword(amd_chipset.nb_dev, 405 NB_PCIE_INDX_ADDR, addr); 406 pci_read_config_dword(amd_chipset.nb_dev, 407 NB_PCIE_INDX_DATA, &val); 408 409 val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12)); 410 val |= bit | (bit << 3) | (bit << 12); 411 val |= ((!bit) << 4) | ((!bit) << 9); 412 pci_write_config_dword(amd_chipset.nb_dev, 413 NB_PCIE_INDX_DATA, val); 414 415 addr = BIF_NB; 416 pci_write_config_dword(amd_chipset.nb_dev, 417 NB_PCIE_INDX_ADDR, addr); 418 pci_read_config_dword(amd_chipset.nb_dev, 419 NB_PCIE_INDX_DATA, &val); 420 val &= ~(1 << 8); 421 val |= bit << 8; 422 423 pci_write_config_dword(amd_chipset.nb_dev, 424 NB_PCIE_INDX_DATA, val); 425 } else if (amd_chipset.nb_type == 2) { 426 addr = NB_PIF0_PWRDOWN_0; 427 pci_write_config_dword(amd_chipset.nb_dev, 428 NB_PCIE_INDX_ADDR, addr); 429 pci_read_config_dword(amd_chipset.nb_dev, 430 NB_PCIE_INDX_DATA, &val); 431 if (disable) 432 val &= ~(0x3f << 7); 433 else 434 val |= 0x3f << 7; 435 436 pci_write_config_dword(amd_chipset.nb_dev, 437 NB_PCIE_INDX_DATA, val); 438 439 addr = NB_PIF0_PWRDOWN_1; 440 pci_write_config_dword(amd_chipset.nb_dev, 441 NB_PCIE_INDX_ADDR, addr); 442 pci_read_config_dword(amd_chipset.nb_dev, 443 NB_PCIE_INDX_DATA, &val); 444 if (disable) 445 val &= ~(0x3f << 7); 446 else 447 val |= 0x3f << 7; 448 449 pci_write_config_dword(amd_chipset.nb_dev, 450 NB_PCIE_INDX_DATA, val); 451 } 452 453 spin_unlock_irqrestore(&amd_lock, flags); 454 return; 455 } 456 457 void usb_amd_quirk_pll_disable(void) 458 { 459 usb_amd_quirk_pll(1); 460 } 461 EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_disable); 462 463 void usb_amd_quirk_pll_enable(void) 464 { 465 usb_amd_quirk_pll(0); 466 } 467 EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_enable); 468 469 void usb_amd_dev_put(void) 470 { 471 struct pci_dev *nb, *smbus; 472 unsigned long flags; 473 474 spin_lock_irqsave(&amd_lock, flags); 475 476 amd_chipset.probe_count--; 477 if (amd_chipset.probe_count > 0) { 478 spin_unlock_irqrestore(&amd_lock, flags); 479 return; 480 } 481 482 /* save them to pci_dev_put outside of spinlock */ 483 nb = amd_chipset.nb_dev; 484 smbus = amd_chipset.smbus_dev; 485 486 amd_chipset.nb_dev = NULL; 487 amd_chipset.smbus_dev = NULL; 488 amd_chipset.nb_type = 0; 489 memset(&amd_chipset.sb_type, 0, sizeof(amd_chipset.sb_type)); 490 amd_chipset.isoc_reqs = 0; 491 amd_chipset.need_pll_quirk = false; 492 493 spin_unlock_irqrestore(&amd_lock, flags); 494 495 pci_dev_put(nb); 496 pci_dev_put(smbus); 497 } 498 EXPORT_SYMBOL_GPL(usb_amd_dev_put); 499 500 /* 501 * Check if port is disabled in BIOS on AMD Promontory host. 502 * BIOS Disabled ports may wake on connect/disconnect and need 503 * driver workaround to keep them disabled. 504 * Returns true if port is marked disabled. 505 */ 506 bool usb_amd_pt_check_port(struct device *device, int port) 507 { 508 unsigned char value, port_shift; 509 struct pci_dev *pdev; 510 u16 reg; 511 512 pdev = to_pci_dev(device); 513 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_1_ADDR); 514 515 pci_read_config_byte(pdev, PT_READ_INDX, &value); 516 if (value != PT_SIG_1_DATA) 517 return false; 518 519 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_2_ADDR); 520 521 pci_read_config_byte(pdev, PT_READ_INDX, &value); 522 if (value != PT_SIG_2_DATA) 523 return false; 524 525 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_3_ADDR); 526 527 pci_read_config_byte(pdev, PT_READ_INDX, &value); 528 if (value != PT_SIG_3_DATA) 529 return false; 530 531 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_4_ADDR); 532 533 pci_read_config_byte(pdev, PT_READ_INDX, &value); 534 if (value != PT_SIG_4_DATA) 535 return false; 536 537 /* Check disabled port setting, if bit is set port is enabled */ 538 switch (pdev->device) { 539 case 0x43b9: 540 case 0x43ba: 541 /* 542 * device is AMD_PROMONTORYA_4(0x43b9) or PROMONTORYA_3(0x43ba) 543 * PT4_P1_REG bits[7..1] represents USB2.0 ports 6 to 0 544 * PT4_P2_REG bits[6..0] represents ports 13 to 7 545 */ 546 if (port > 6) { 547 reg = PT4_P2_REG; 548 port_shift = port - 7; 549 } else { 550 reg = PT4_P1_REG; 551 port_shift = port + 1; 552 } 553 break; 554 case 0x43bb: 555 /* 556 * device is AMD_PROMONTORYA_2(0x43bb) 557 * PT2_P1_REG bits[7..5] represents USB2.0 ports 2 to 0 558 * PT2_P2_REG bits[5..0] represents ports 9 to 3 559 */ 560 if (port > 2) { 561 reg = PT2_P2_REG; 562 port_shift = port - 3; 563 } else { 564 reg = PT2_P1_REG; 565 port_shift = port + 5; 566 } 567 break; 568 case 0x43bc: 569 /* 570 * device is AMD_PROMONTORYA_1(0x43bc) 571 * PT1_P1_REG[7..4] represents USB2.0 ports 3 to 0 572 * PT1_P2_REG[5..0] represents ports 9 to 4 573 */ 574 if (port > 3) { 575 reg = PT1_P2_REG; 576 port_shift = port - 4; 577 } else { 578 reg = PT1_P1_REG; 579 port_shift = port + 4; 580 } 581 break; 582 default: 583 return false; 584 } 585 pci_write_config_word(pdev, PT_ADDR_INDX, reg); 586 pci_read_config_byte(pdev, PT_READ_INDX, &value); 587 588 return !(value & BIT(port_shift)); 589 } 590 EXPORT_SYMBOL_GPL(usb_amd_pt_check_port); 591 #endif /* CONFIG_USB_PCI_AMD */ 592 593 static int usb_asmedia_wait_write(struct pci_dev *pdev) 594 { 595 unsigned long retry_count; 596 unsigned char value; 597 598 for (retry_count = 1000; retry_count > 0; --retry_count) { 599 600 pci_read_config_byte(pdev, ASMT_CONTROL_REG, &value); 601 602 if (value == 0xff) { 603 dev_err(&pdev->dev, "%s: check_ready ERROR", __func__); 604 return -EIO; 605 } 606 607 if ((value & ASMT_CONTROL_WRITE_BIT) == 0) 608 return 0; 609 610 udelay(50); 611 } 612 613 dev_warn(&pdev->dev, "%s: check_write_ready timeout", __func__); 614 return -ETIMEDOUT; 615 } 616 617 void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev) 618 { 619 if (usb_asmedia_wait_write(pdev) != 0) 620 return; 621 622 /* send command and address to device */ 623 pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_WRITEREG_CMD); 624 pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_FLOWCTL_ADDR); 625 pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT); 626 627 if (usb_asmedia_wait_write(pdev) != 0) 628 return; 629 630 /* send data to device */ 631 pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_FLOWCTL_DATA); 632 pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_PSEUDO_DATA); 633 pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT); 634 } 635 EXPORT_SYMBOL_GPL(usb_asmedia_modifyflowcontrol); 636 637 static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask) 638 { 639 u16 cmd; 640 641 return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask); 642 } 643 644 #define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY) 645 646 #if defined(CONFIG_HAS_IOPORT) && IS_ENABLED(CONFIG_USB_UHCI_HCD) 647 /* 648 * Make sure the controller is completely inactive, unable to 649 * generate interrupts or do DMA. 650 */ 651 void uhci_reset_hc(struct pci_dev *pdev, unsigned long base) 652 { 653 /* Turn off PIRQ enable and SMI enable. (This also turns off the 654 * BIOS's USB Legacy Support.) Turn off all the R/WC bits too. 655 */ 656 pci_write_config_word(pdev, UHCI_USBLEGSUP, UHCI_USBLEGSUP_RWC); 657 658 /* Reset the HC - this will force us to get a 659 * new notification of any already connected 660 * ports due to the virtual disconnect that it 661 * implies. 662 */ 663 outw(UHCI_USBCMD_HCRESET, base + UHCI_USBCMD); 664 mb(); 665 udelay(5); 666 if (inw(base + UHCI_USBCMD) & UHCI_USBCMD_HCRESET) 667 dev_warn(&pdev->dev, "HCRESET not completed yet!\n"); 668 669 /* Just to be safe, disable interrupt requests and 670 * make sure the controller is stopped. 671 */ 672 outw(0, base + UHCI_USBINTR); 673 outw(0, base + UHCI_USBCMD); 674 } 675 EXPORT_SYMBOL_GPL(uhci_reset_hc); 676 677 /* 678 * Initialize a controller that was newly discovered or has just been 679 * resumed. In either case we can't be sure of its previous state. 680 * 681 * Returns: 1 if the controller was reset, 0 otherwise. 682 */ 683 int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base) 684 { 685 u16 legsup; 686 unsigned int cmd, intr; 687 688 /* 689 * When restarting a suspended controller, we expect all the 690 * settings to be the same as we left them: 691 * 692 * PIRQ and SMI disabled, no R/W bits set in USBLEGSUP; 693 * Controller is stopped and configured with EGSM set; 694 * No interrupts enabled except possibly Resume Detect. 695 * 696 * If any of these conditions are violated we do a complete reset. 697 */ 698 pci_read_config_word(pdev, UHCI_USBLEGSUP, &legsup); 699 if (legsup & ~(UHCI_USBLEGSUP_RO | UHCI_USBLEGSUP_RWC)) { 700 dev_dbg(&pdev->dev, "%s: legsup = 0x%04x\n", 701 __func__, legsup); 702 goto reset_needed; 703 } 704 705 cmd = inw(base + UHCI_USBCMD); 706 if ((cmd & UHCI_USBCMD_RUN) || !(cmd & UHCI_USBCMD_CONFIGURE) || 707 !(cmd & UHCI_USBCMD_EGSM)) { 708 dev_dbg(&pdev->dev, "%s: cmd = 0x%04x\n", 709 __func__, cmd); 710 goto reset_needed; 711 } 712 713 intr = inw(base + UHCI_USBINTR); 714 if (intr & (~UHCI_USBINTR_RESUME)) { 715 dev_dbg(&pdev->dev, "%s: intr = 0x%04x\n", 716 __func__, intr); 717 goto reset_needed; 718 } 719 return 0; 720 721 reset_needed: 722 dev_dbg(&pdev->dev, "Performing full reset\n"); 723 uhci_reset_hc(pdev, base); 724 return 1; 725 } 726 EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc); 727 728 #define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO) 729 730 static void quirk_usb_handoff_uhci(struct pci_dev *pdev) 731 { 732 unsigned long base = 0; 733 int i; 734 735 if (!pio_enabled(pdev)) 736 return; 737 738 for (i = 0; i < PCI_STD_NUM_BARS; i++) 739 if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) { 740 base = pci_resource_start(pdev, i); 741 break; 742 } 743 744 if (base) 745 uhci_check_and_reset_hc(pdev, base); 746 } 747 748 #else /* defined(CONFIG_HAS_IOPORT && IS_ENABLED(CONFIG_USB_UHCI_HCD) */ 749 750 static void quirk_usb_handoff_uhci(struct pci_dev *pdev) {} 751 752 #endif /* defined(CONFIG_HAS_IOPORT && IS_ENABLED(CONFIG_USB_UHCI_HCD) */ 753 754 static int mmio_resource_enabled(struct pci_dev *pdev, int idx) 755 { 756 return pci_resource_start(pdev, idx) && mmio_enabled(pdev); 757 } 758 759 static void quirk_usb_handoff_ohci(struct pci_dev *pdev) 760 { 761 void __iomem *base; 762 u32 control; 763 u32 fminterval = 0; 764 bool no_fminterval = false; 765 int cnt; 766 767 if (!mmio_resource_enabled(pdev, 0)) 768 return; 769 770 base = pci_ioremap_bar(pdev, 0); 771 if (base == NULL) 772 return; 773 774 /* 775 * ULi M5237 OHCI controller locks the whole system when accessing 776 * the OHCI_FMINTERVAL offset. 777 */ 778 if (pdev->vendor == PCI_VENDOR_ID_AL && pdev->device == 0x5237) 779 no_fminterval = true; 780 781 control = readl(base + OHCI_CONTROL); 782 783 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */ 784 #ifdef __hppa__ 785 #define OHCI_CTRL_MASK (OHCI_CTRL_RWC | OHCI_CTRL_IR) 786 #else 787 #define OHCI_CTRL_MASK OHCI_CTRL_RWC 788 789 if (control & OHCI_CTRL_IR) { 790 int wait_time = 500; /* arbitrary; 5 seconds */ 791 writel(OHCI_INTR_OC, base + OHCI_INTRENABLE); 792 writel(OHCI_OCR, base + OHCI_CMDSTATUS); 793 while (wait_time > 0 && 794 readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) { 795 wait_time -= 10; 796 msleep(10); 797 } 798 if (wait_time <= 0) 799 dev_warn(&pdev->dev, 800 "OHCI: BIOS handoff failed (BIOS bug?) %08x\n", 801 readl(base + OHCI_CONTROL)); 802 } 803 #endif 804 805 /* disable interrupts */ 806 writel((u32) ~0, base + OHCI_INTRDISABLE); 807 808 /* Go into the USB_RESET state, preserving RWC (and possibly IR) */ 809 writel(control & OHCI_CTRL_MASK, base + OHCI_CONTROL); 810 readl(base + OHCI_CONTROL); 811 812 /* software reset of the controller, preserving HcFmInterval */ 813 if (!no_fminterval) 814 fminterval = readl(base + OHCI_FMINTERVAL); 815 816 writel(OHCI_HCR, base + OHCI_CMDSTATUS); 817 818 /* reset requires max 10 us delay */ 819 for (cnt = 30; cnt > 0; --cnt) { /* ... allow extra time */ 820 if ((readl(base + OHCI_CMDSTATUS) & OHCI_HCR) == 0) 821 break; 822 udelay(1); 823 } 824 825 if (!no_fminterval) 826 writel(fminterval, base + OHCI_FMINTERVAL); 827 828 /* Now the controller is safely in SUSPEND and nothing can wake it up */ 829 iounmap(base); 830 } 831 832 static const struct dmi_system_id ehci_dmi_nohandoff_table[] = { 833 { 834 /* Pegatron Lucid (ExoPC) */ 835 .matches = { 836 DMI_MATCH(DMI_BOARD_NAME, "EXOPG06411"), 837 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-CE-133"), 838 }, 839 }, 840 { 841 /* Pegatron Lucid (Ordissimo AIRIS) */ 842 .matches = { 843 DMI_MATCH(DMI_BOARD_NAME, "M11JB"), 844 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"), 845 }, 846 }, 847 { 848 /* Pegatron Lucid (Ordissimo) */ 849 .matches = { 850 DMI_MATCH(DMI_BOARD_NAME, "Ordissimo"), 851 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"), 852 }, 853 }, 854 { 855 /* HASEE E200 */ 856 .matches = { 857 DMI_MATCH(DMI_BOARD_VENDOR, "HASEE"), 858 DMI_MATCH(DMI_BOARD_NAME, "E210"), 859 DMI_MATCH(DMI_BIOS_VERSION, "6.00"), 860 }, 861 }, 862 { } 863 }; 864 865 static void ehci_bios_handoff(struct pci_dev *pdev, 866 void __iomem *op_reg_base, 867 u32 cap, u8 offset) 868 { 869 int try_handoff = 1, tried_handoff = 0; 870 871 /* 872 * The Pegatron Lucid tablet sporadically waits for 98 seconds trying 873 * the handoff on its unused controller. Skip it. 874 * 875 * The HASEE E200 hangs when the semaphore is set (bugzilla #77021). 876 */ 877 if (pdev->vendor == 0x8086 && (pdev->device == 0x283a || 878 pdev->device == 0x27cc)) { 879 if (dmi_check_system(ehci_dmi_nohandoff_table)) 880 try_handoff = 0; 881 } 882 883 if (try_handoff && (cap & EHCI_USBLEGSUP_BIOS)) { 884 dev_dbg(&pdev->dev, "EHCI: BIOS handoff\n"); 885 886 #if 0 887 /* aleksey_gorelov@phoenix.com reports that some systems need SMI forced on, 888 * but that seems dubious in general (the BIOS left it off intentionally) 889 * and is known to prevent some systems from booting. so we won't do this 890 * unless maybe we can determine when we're on a system that needs SMI forced. 891 */ 892 /* BIOS workaround (?): be sure the pre-Linux code 893 * receives the SMI 894 */ 895 pci_read_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, &val); 896 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 897 val | EHCI_USBLEGCTLSTS_SOOE); 898 #endif 899 900 /* some systems get upset if this semaphore is 901 * set for any other reason than forcing a BIOS 902 * handoff.. 903 */ 904 pci_write_config_byte(pdev, offset + 3, 1); 905 } 906 907 /* if boot firmware now owns EHCI, spin till it hands it over. */ 908 if (try_handoff) { 909 int msec = 1000; 910 while ((cap & EHCI_USBLEGSUP_BIOS) && (msec > 0)) { 911 tried_handoff = 1; 912 msleep(10); 913 msec -= 10; 914 pci_read_config_dword(pdev, offset, &cap); 915 } 916 } 917 918 if (cap & EHCI_USBLEGSUP_BIOS) { 919 /* well, possibly buggy BIOS... try to shut it down, 920 * and hope nothing goes too wrong 921 */ 922 if (try_handoff) 923 dev_warn(&pdev->dev, 924 "EHCI: BIOS handoff failed (BIOS bug?) %08x\n", 925 cap); 926 pci_write_config_byte(pdev, offset + 2, 0); 927 } 928 929 /* just in case, always disable EHCI SMIs */ 930 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 0); 931 932 /* If the BIOS ever owned the controller then we can't expect 933 * any power sessions to remain intact. 934 */ 935 if (tried_handoff) 936 writel(0, op_reg_base + EHCI_CONFIGFLAG); 937 } 938 939 static void quirk_usb_disable_ehci(struct pci_dev *pdev) 940 { 941 void __iomem *base, *op_reg_base; 942 u32 hcc_params, cap, val; 943 u8 offset, cap_length; 944 int wait_time, count = 256/4; 945 946 if (!mmio_resource_enabled(pdev, 0)) 947 return; 948 949 base = pci_ioremap_bar(pdev, 0); 950 if (base == NULL) 951 return; 952 953 cap_length = readb(base); 954 op_reg_base = base + cap_length; 955 956 /* EHCI 0.96 and later may have "extended capabilities" 957 * spec section 5.1 explains the bios handoff, e.g. for 958 * booting from USB disk or using a usb keyboard 959 */ 960 hcc_params = readl(base + EHCI_HCC_PARAMS); 961 962 /* LS7A EHCI controller doesn't have extended capabilities, the 963 * EECP (EHCI Extended Capabilities Pointer) field of HCCPARAMS 964 * register should be 0x0 but it reads as 0xa0. So clear it to 965 * avoid error messages on boot. 966 */ 967 if (pdev->vendor == PCI_VENDOR_ID_LOONGSON && pdev->device == 0x7a14) 968 hcc_params &= ~(0xffL << 8); 969 970 offset = (hcc_params >> 8) & 0xff; 971 while (offset && --count) { 972 pci_read_config_dword(pdev, offset, &cap); 973 974 switch (cap & 0xff) { 975 case 1: 976 ehci_bios_handoff(pdev, op_reg_base, cap, offset); 977 break; 978 case 0: /* Illegal reserved cap, set cap=0 so we exit */ 979 cap = 0; 980 fallthrough; 981 default: 982 dev_warn(&pdev->dev, 983 "EHCI: unrecognized capability %02x\n", 984 cap & 0xff); 985 } 986 offset = (cap >> 8) & 0xff; 987 } 988 if (!count) 989 dev_printk(KERN_DEBUG, &pdev->dev, "EHCI: capability loop?\n"); 990 991 /* 992 * halt EHCI & disable its interrupts in any case 993 */ 994 val = readl(op_reg_base + EHCI_USBSTS); 995 if ((val & EHCI_USBSTS_HALTED) == 0) { 996 val = readl(op_reg_base + EHCI_USBCMD); 997 val &= ~EHCI_USBCMD_RUN; 998 writel(val, op_reg_base + EHCI_USBCMD); 999 1000 wait_time = 2000; 1001 do { 1002 writel(0x3f, op_reg_base + EHCI_USBSTS); 1003 udelay(100); 1004 wait_time -= 100; 1005 val = readl(op_reg_base + EHCI_USBSTS); 1006 if ((val == ~(u32)0) || (val & EHCI_USBSTS_HALTED)) { 1007 break; 1008 } 1009 } while (wait_time > 0); 1010 } 1011 writel(0, op_reg_base + EHCI_USBINTR); 1012 writel(0x3f, op_reg_base + EHCI_USBSTS); 1013 1014 iounmap(base); 1015 } 1016 1017 /* 1018 * handshake - spin reading a register until handshake completes 1019 * @ptr: address of hc register to be read 1020 * @mask: bits to look at in result of read 1021 * @done: value of those bits when handshake succeeds 1022 * @wait_usec: timeout in microseconds 1023 * @delay_usec: delay in microseconds to wait between polling 1024 * 1025 * Polls a register every delay_usec microseconds. 1026 * Returns 0 when the mask bits have the value done. 1027 * Returns -ETIMEDOUT if this condition is not true after 1028 * wait_usec microseconds have passed. 1029 */ 1030 static int handshake(void __iomem *ptr, u32 mask, u32 done, 1031 int wait_usec, int delay_usec) 1032 { 1033 u32 result; 1034 1035 return readl_poll_timeout_atomic(ptr, result, 1036 ((result & mask) == done), 1037 delay_usec, wait_usec); 1038 } 1039 1040 /* 1041 * Intel's Panther Point chipset has two host controllers (EHCI and xHCI) that 1042 * share some number of ports. These ports can be switched between either 1043 * controller. Not all of the ports under the EHCI host controller may be 1044 * switchable. 1045 * 1046 * The ports should be switched over to xHCI before PCI probes for any device 1047 * start. This avoids active devices under EHCI being disconnected during the 1048 * port switchover, which could cause loss of data on USB storage devices, or 1049 * failed boot when the root file system is on a USB mass storage device and is 1050 * enumerated under EHCI first. 1051 * 1052 * We write into the xHC's PCI configuration space in some Intel-specific 1053 * registers to switch the ports over. The USB 3.0 terminations and the USB 1054 * 2.0 data wires are switched separately. We want to enable the SuperSpeed 1055 * terminations before switching the USB 2.0 wires over, so that USB 3.0 1056 * devices connect at SuperSpeed, rather than at USB 2.0 speeds. 1057 */ 1058 void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev) 1059 { 1060 u32 ports_available; 1061 bool ehci_found = false; 1062 struct pci_dev *companion = NULL; 1063 1064 /* Sony VAIO t-series with subsystem device ID 90a8 is not capable of 1065 * switching ports from EHCI to xHCI 1066 */ 1067 if (xhci_pdev->subsystem_vendor == PCI_VENDOR_ID_SONY && 1068 xhci_pdev->subsystem_device == 0x90a8) 1069 return; 1070 1071 /* make sure an intel EHCI controller exists */ 1072 for_each_pci_dev(companion) { 1073 if (companion->class == PCI_CLASS_SERIAL_USB_EHCI && 1074 companion->vendor == PCI_VENDOR_ID_INTEL) { 1075 ehci_found = true; 1076 break; 1077 } 1078 } 1079 1080 if (!ehci_found) 1081 return; 1082 1083 /* Don't switchover the ports if the user hasn't compiled the xHCI 1084 * driver. Otherwise they will see "dead" USB ports that don't power 1085 * the devices. 1086 */ 1087 if (!IS_ENABLED(CONFIG_USB_XHCI_HCD)) { 1088 dev_warn(&xhci_pdev->dev, 1089 "CONFIG_USB_XHCI_HCD is turned off, defaulting to EHCI.\n"); 1090 dev_warn(&xhci_pdev->dev, 1091 "USB 3.0 devices will work at USB 2.0 speeds.\n"); 1092 usb_disable_xhci_ports(xhci_pdev); 1093 return; 1094 } 1095 1096 /* Read USB3PRM, the USB 3.0 Port Routing Mask Register 1097 * Indicate the ports that can be changed from OS. 1098 */ 1099 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3PRM, 1100 &ports_available); 1101 1102 dev_dbg(&xhci_pdev->dev, "Configurable ports to enable SuperSpeed: 0x%x\n", 1103 ports_available); 1104 1105 /* Write USB3_PSSEN, the USB 3.0 Port SuperSpeed Enable 1106 * Register, to turn on SuperSpeed terminations for the 1107 * switchable ports. 1108 */ 1109 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 1110 ports_available); 1111 1112 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 1113 &ports_available); 1114 dev_dbg(&xhci_pdev->dev, 1115 "USB 3.0 ports that are now enabled under xHCI: 0x%x\n", 1116 ports_available); 1117 1118 /* Read XUSB2PRM, xHCI USB 2.0 Port Routing Mask Register 1119 * Indicate the USB 2.0 ports to be controlled by the xHCI host. 1120 */ 1121 1122 pci_read_config_dword(xhci_pdev, USB_INTEL_USB2PRM, 1123 &ports_available); 1124 1125 dev_dbg(&xhci_pdev->dev, "Configurable USB 2.0 ports to hand over to xCHI: 0x%x\n", 1126 ports_available); 1127 1128 /* Write XUSB2PR, the xHC USB 2.0 Port Routing Register, to 1129 * switch the USB 2.0 power and data lines over to the xHCI 1130 * host. 1131 */ 1132 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 1133 ports_available); 1134 1135 pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 1136 &ports_available); 1137 dev_dbg(&xhci_pdev->dev, 1138 "USB 2.0 ports that are now switched over to xHCI: 0x%x\n", 1139 ports_available); 1140 } 1141 EXPORT_SYMBOL_GPL(usb_enable_intel_xhci_ports); 1142 1143 void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) 1144 { 1145 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 0x0); 1146 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 0x0); 1147 } 1148 EXPORT_SYMBOL_GPL(usb_disable_xhci_ports); 1149 1150 /* 1151 * PCI Quirks for xHCI. 1152 * 1153 * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS. 1154 * It signals to the BIOS that the OS wants control of the host controller, 1155 * and then waits 1 second for the BIOS to hand over control. 1156 * If we timeout, assume the BIOS is broken and take control anyway. 1157 */ 1158 static void quirk_usb_handoff_xhci(struct pci_dev *pdev) 1159 { 1160 void __iomem *base; 1161 int ext_cap_offset; 1162 void __iomem *op_reg_base; 1163 u32 val; 1164 int timeout; 1165 int len = pci_resource_len(pdev, 0); 1166 1167 if (!mmio_resource_enabled(pdev, 0)) 1168 return; 1169 1170 base = ioremap(pci_resource_start(pdev, 0), len); 1171 if (base == NULL) 1172 return; 1173 1174 /* 1175 * Find the Legacy Support Capability register - 1176 * this is optional for xHCI host controllers. 1177 */ 1178 ext_cap_offset = xhci_find_next_ext_cap(base, 0, XHCI_EXT_CAPS_LEGACY); 1179 1180 if (!ext_cap_offset) 1181 goto hc_init; 1182 1183 if ((ext_cap_offset + sizeof(val)) > len) { 1184 /* We're reading garbage from the controller */ 1185 dev_warn(&pdev->dev, "xHCI controller failing to respond"); 1186 goto iounmap; 1187 } 1188 val = readl(base + ext_cap_offset); 1189 1190 /* Auto handoff never worked for these devices. Force it and continue */ 1191 if ((pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241) || 1192 (pdev->vendor == PCI_VENDOR_ID_RENESAS 1193 && pdev->device == 0x0014)) { 1194 val = (val | XHCI_HC_OS_OWNED) & ~XHCI_HC_BIOS_OWNED; 1195 writel(val, base + ext_cap_offset); 1196 } 1197 1198 /* If the BIOS owns the HC, signal that the OS wants it, and wait */ 1199 if (val & XHCI_HC_BIOS_OWNED) { 1200 writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset); 1201 1202 /* Wait for 1 second with 10 microsecond polling interval */ 1203 timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED, 1204 0, 1000000, 10); 1205 1206 /* Assume a buggy BIOS and take HC ownership anyway */ 1207 if (timeout) { 1208 dev_warn(&pdev->dev, 1209 "xHCI BIOS handoff failed (BIOS bug ?) %08x\n", 1210 val); 1211 writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset); 1212 } 1213 } 1214 1215 val = readl(base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); 1216 /* Mask off (turn off) any enabled SMIs */ 1217 val &= XHCI_LEGACY_DISABLE_SMI; 1218 /* Mask all SMI events bits, RW1C */ 1219 val |= XHCI_LEGACY_SMI_EVENTS; 1220 /* Disable any BIOS SMIs and clear all SMI events*/ 1221 writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); 1222 1223 hc_init: 1224 if (pdev->vendor == PCI_VENDOR_ID_INTEL) 1225 usb_enable_intel_xhci_ports(pdev); 1226 1227 op_reg_base = base + XHCI_HC_LENGTH(readl(base)); 1228 1229 /* Wait for the host controller to be ready before writing any 1230 * operational or runtime registers. Wait 5 seconds and no more. 1231 */ 1232 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0, 1233 5000000, 10); 1234 /* Assume a buggy HC and start HC initialization anyway */ 1235 if (timeout) { 1236 val = readl(op_reg_base + XHCI_STS_OFFSET); 1237 dev_warn(&pdev->dev, 1238 "xHCI HW not ready after 5 sec (HC bug?) status = 0x%x\n", 1239 val); 1240 } 1241 1242 /* Send the halt and disable interrupts command */ 1243 val = readl(op_reg_base + XHCI_CMD_OFFSET); 1244 val &= ~(XHCI_CMD_RUN | XHCI_IRQS); 1245 writel(val, op_reg_base + XHCI_CMD_OFFSET); 1246 1247 /* Wait for the HC to halt - poll every 125 usec (one microframe). */ 1248 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1, 1249 XHCI_MAX_HALT_USEC, 125); 1250 if (timeout) { 1251 val = readl(op_reg_base + XHCI_STS_OFFSET); 1252 dev_warn(&pdev->dev, 1253 "xHCI HW did not halt within %d usec status = 0x%x\n", 1254 XHCI_MAX_HALT_USEC, val); 1255 } 1256 1257 iounmap: 1258 iounmap(base); 1259 } 1260 1261 static void quirk_usb_early_handoff(struct pci_dev *pdev) 1262 { 1263 struct device_node *parent; 1264 bool is_rpi; 1265 1266 /* Skip Netlogic mips SoC's internal PCI USB controller. 1267 * This device does not need/support EHCI/OHCI handoff 1268 */ 1269 if (pdev->vendor == 0x184e) /* vendor Netlogic */ 1270 return; 1271 1272 /* 1273 * Bypass the Raspberry Pi 4 controller xHCI controller, things are 1274 * taken care of by the board's co-processor. 1275 */ 1276 if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483) { 1277 parent = of_get_parent(pdev->bus->dev.of_node); 1278 is_rpi = of_device_is_compatible(parent, "brcm,bcm2711-pcie"); 1279 of_node_put(parent); 1280 if (is_rpi) 1281 return; 1282 } 1283 1284 if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI && 1285 pdev->class != PCI_CLASS_SERIAL_USB_OHCI && 1286 pdev->class != PCI_CLASS_SERIAL_USB_EHCI && 1287 pdev->class != PCI_CLASS_SERIAL_USB_XHCI) 1288 return; 1289 1290 if (pci_enable_device(pdev) < 0) { 1291 dev_warn(&pdev->dev, 1292 "Can't enable PCI device, BIOS handoff failed.\n"); 1293 return; 1294 } 1295 if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI) 1296 quirk_usb_handoff_uhci(pdev); 1297 else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI) 1298 quirk_usb_handoff_ohci(pdev); 1299 else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI) 1300 quirk_usb_disable_ehci(pdev); 1301 else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI) 1302 quirk_usb_handoff_xhci(pdev); 1303 pci_disable_device(pdev); 1304 } 1305 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, 1306 PCI_CLASS_SERIAL_USB, 8, quirk_usb_early_handoff); 1307