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 */ 116enum 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 128struct amd_chipset_type { 129 enum amd_chipset_gen gen; 130 u8 rev; 131}; 132 133static 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 143static 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 */ 153static 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 196void 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} 207EXPORT_SYMBOL_GPL(sb800_prefetch); 208 209static 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 267commit: 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 289int 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} 300EXPORT_SYMBOL_GPL(usb_hcd_amd_remote_wakeup_quirk); 301 302bool 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} 313EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk); 314 315bool 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} 321EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk); 322 323bool usb_amd_quirk_pll_check(void) 324{ 325 usb_amd_find_chipset_info(); 326 return amd_chipset.need_pll_quirk; 327} 328EXPORT_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 */ 340static 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 457void usb_amd_quirk_pll_disable(void) 458{ 459 usb_amd_quirk_pll(1); 460} 461EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_disable); 462 463void usb_amd_quirk_pll_enable(void) 464{ 465 usb_amd_quirk_pll(0); 466} 467EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_enable); 468 469void 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} 498EXPORT_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 */ 506bool 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} 590EXPORT_SYMBOL_GPL(usb_amd_pt_check_port); 591#endif /* CONFIG_USB_PCI_AMD */ 592 593static 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 617void 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} 635EXPORT_SYMBOL_GPL(usb_asmedia_modifyflowcontrol); 636 637static 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 */ 651void 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} 675EXPORT_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 */ 683int 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 721reset_needed: 722 dev_dbg(&pdev->dev, "Performing full reset\n"); 723 uhci_reset_hc(pdev, base); 724 return 1; 725} 726EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc); 727 728#define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO) 729 730static 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 750static void quirk_usb_handoff_uhci(struct pci_dev *pdev) {} 751 752#endif /* defined(CONFIG_HAS_IOPORT && IS_ENABLED(CONFIG_USB_UHCI_HCD) */ 753 754static int mmio_resource_enabled(struct pci_dev *pdev, int idx) 755{ 756 return pci_resource_start(pdev, idx) && mmio_enabled(pdev); 757} 758 759static 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 832static 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 865static 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 939static 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 offset = (hcc_params >> 8) & 0xff; 962 while (offset && --count) { 963 pci_read_config_dword(pdev, offset, &cap); 964 965 switch (cap & 0xff) { 966 case 1: 967 ehci_bios_handoff(pdev, op_reg_base, cap, offset); 968 break; 969 case 0: /* Illegal reserved cap, set cap=0 so we exit */ 970 cap = 0; 971 fallthrough; 972 default: 973 dev_warn(&pdev->dev, 974 "EHCI: unrecognized capability %02x\n", 975 cap & 0xff); 976 } 977 offset = (cap >> 8) & 0xff; 978 } 979 if (!count) 980 dev_printk(KERN_DEBUG, &pdev->dev, "EHCI: capability loop?\n"); 981 982 /* 983 * halt EHCI & disable its interrupts in any case 984 */ 985 val = readl(op_reg_base + EHCI_USBSTS); 986 if ((val & EHCI_USBSTS_HALTED) == 0) { 987 val = readl(op_reg_base + EHCI_USBCMD); 988 val &= ~EHCI_USBCMD_RUN; 989 writel(val, op_reg_base + EHCI_USBCMD); 990 991 wait_time = 2000; 992 do { 993 writel(0x3f, op_reg_base + EHCI_USBSTS); 994 udelay(100); 995 wait_time -= 100; 996 val = readl(op_reg_base + EHCI_USBSTS); 997 if ((val == ~(u32)0) || (val & EHCI_USBSTS_HALTED)) { 998 break; 999 } 1000 } while (wait_time > 0); 1001 } 1002 writel(0, op_reg_base + EHCI_USBINTR); 1003 writel(0x3f, op_reg_base + EHCI_USBSTS); 1004 1005 iounmap(base); 1006} 1007 1008/* 1009 * handshake - spin reading a register until handshake completes 1010 * @ptr: address of hc register to be read 1011 * @mask: bits to look at in result of read 1012 * @done: value of those bits when handshake succeeds 1013 * @wait_usec: timeout in microseconds 1014 * @delay_usec: delay in microseconds to wait between polling 1015 * 1016 * Polls a register every delay_usec microseconds. 1017 * Returns 0 when the mask bits have the value done. 1018 * Returns -ETIMEDOUT if this condition is not true after 1019 * wait_usec microseconds have passed. 1020 */ 1021static int handshake(void __iomem *ptr, u32 mask, u32 done, 1022 int wait_usec, int delay_usec) 1023{ 1024 u32 result; 1025 1026 return readl_poll_timeout_atomic(ptr, result, 1027 ((result & mask) == done), 1028 delay_usec, wait_usec); 1029} 1030 1031/* 1032 * Intel's Panther Point chipset has two host controllers (EHCI and xHCI) that 1033 * share some number of ports. These ports can be switched between either 1034 * controller. Not all of the ports under the EHCI host controller may be 1035 * switchable. 1036 * 1037 * The ports should be switched over to xHCI before PCI probes for any device 1038 * start. This avoids active devices under EHCI being disconnected during the 1039 * port switchover, which could cause loss of data on USB storage devices, or 1040 * failed boot when the root file system is on a USB mass storage device and is 1041 * enumerated under EHCI first. 1042 * 1043 * We write into the xHC's PCI configuration space in some Intel-specific 1044 * registers to switch the ports over. The USB 3.0 terminations and the USB 1045 * 2.0 data wires are switched separately. We want to enable the SuperSpeed 1046 * terminations before switching the USB 2.0 wires over, so that USB 3.0 1047 * devices connect at SuperSpeed, rather than at USB 2.0 speeds. 1048 */ 1049void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev) 1050{ 1051 u32 ports_available; 1052 bool ehci_found = false; 1053 struct pci_dev *companion = NULL; 1054 1055 /* Sony VAIO t-series with subsystem device ID 90a8 is not capable of 1056 * switching ports from EHCI to xHCI 1057 */ 1058 if (xhci_pdev->subsystem_vendor == PCI_VENDOR_ID_SONY && 1059 xhci_pdev->subsystem_device == 0x90a8) 1060 return; 1061 1062 /* make sure an intel EHCI controller exists */ 1063 for_each_pci_dev(companion) { 1064 if (companion->class == PCI_CLASS_SERIAL_USB_EHCI && 1065 companion->vendor == PCI_VENDOR_ID_INTEL) { 1066 ehci_found = true; 1067 break; 1068 } 1069 } 1070 1071 if (!ehci_found) 1072 return; 1073 1074 /* Don't switchover the ports if the user hasn't compiled the xHCI 1075 * driver. Otherwise they will see "dead" USB ports that don't power 1076 * the devices. 1077 */ 1078 if (!IS_ENABLED(CONFIG_USB_XHCI_HCD)) { 1079 dev_warn(&xhci_pdev->dev, 1080 "CONFIG_USB_XHCI_HCD is turned off, defaulting to EHCI.\n"); 1081 dev_warn(&xhci_pdev->dev, 1082 "USB 3.0 devices will work at USB 2.0 speeds.\n"); 1083 usb_disable_xhci_ports(xhci_pdev); 1084 return; 1085 } 1086 1087 /* Read USB3PRM, the USB 3.0 Port Routing Mask Register 1088 * Indicate the ports that can be changed from OS. 1089 */ 1090 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3PRM, 1091 &ports_available); 1092 1093 dev_dbg(&xhci_pdev->dev, "Configurable ports to enable SuperSpeed: 0x%x\n", 1094 ports_available); 1095 1096 /* Write USB3_PSSEN, the USB 3.0 Port SuperSpeed Enable 1097 * Register, to turn on SuperSpeed terminations for the 1098 * switchable ports. 1099 */ 1100 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 1101 ports_available); 1102 1103 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 1104 &ports_available); 1105 dev_dbg(&xhci_pdev->dev, 1106 "USB 3.0 ports that are now enabled under xHCI: 0x%x\n", 1107 ports_available); 1108 1109 /* Read XUSB2PRM, xHCI USB 2.0 Port Routing Mask Register 1110 * Indicate the USB 2.0 ports to be controlled by the xHCI host. 1111 */ 1112 1113 pci_read_config_dword(xhci_pdev, USB_INTEL_USB2PRM, 1114 &ports_available); 1115 1116 dev_dbg(&xhci_pdev->dev, "Configurable USB 2.0 ports to hand over to xCHI: 0x%x\n", 1117 ports_available); 1118 1119 /* Write XUSB2PR, the xHC USB 2.0 Port Routing Register, to 1120 * switch the USB 2.0 power and data lines over to the xHCI 1121 * host. 1122 */ 1123 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 1124 ports_available); 1125 1126 pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 1127 &ports_available); 1128 dev_dbg(&xhci_pdev->dev, 1129 "USB 2.0 ports that are now switched over to xHCI: 0x%x\n", 1130 ports_available); 1131} 1132EXPORT_SYMBOL_GPL(usb_enable_intel_xhci_ports); 1133 1134void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) 1135{ 1136 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 0x0); 1137 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 0x0); 1138} 1139EXPORT_SYMBOL_GPL(usb_disable_xhci_ports); 1140 1141/* 1142 * PCI Quirks for xHCI. 1143 * 1144 * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS. 1145 * It signals to the BIOS that the OS wants control of the host controller, 1146 * and then waits 1 second for the BIOS to hand over control. 1147 * If we timeout, assume the BIOS is broken and take control anyway. 1148 */ 1149static void quirk_usb_handoff_xhci(struct pci_dev *pdev) 1150{ 1151 void __iomem *base; 1152 int ext_cap_offset; 1153 void __iomem *op_reg_base; 1154 u32 val; 1155 int timeout; 1156 int len = pci_resource_len(pdev, 0); 1157 1158 if (!mmio_resource_enabled(pdev, 0)) 1159 return; 1160 1161 base = ioremap(pci_resource_start(pdev, 0), len); 1162 if (base == NULL) 1163 return; 1164 1165 /* 1166 * Find the Legacy Support Capability register - 1167 * this is optional for xHCI host controllers. 1168 */ 1169 ext_cap_offset = xhci_find_next_ext_cap(base, 0, XHCI_EXT_CAPS_LEGACY); 1170 1171 if (!ext_cap_offset) 1172 goto hc_init; 1173 1174 if ((ext_cap_offset + sizeof(val)) > len) { 1175 /* We're reading garbage from the controller */ 1176 dev_warn(&pdev->dev, "xHCI controller failing to respond"); 1177 goto iounmap; 1178 } 1179 val = readl(base + ext_cap_offset); 1180 1181 /* Auto handoff never worked for these devices. Force it and continue */ 1182 if ((pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241) || 1183 (pdev->vendor == PCI_VENDOR_ID_RENESAS 1184 && pdev->device == 0x0014)) { 1185 val = (val | XHCI_HC_OS_OWNED) & ~XHCI_HC_BIOS_OWNED; 1186 writel(val, base + ext_cap_offset); 1187 } 1188 1189 /* If the BIOS owns the HC, signal that the OS wants it, and wait */ 1190 if (val & XHCI_HC_BIOS_OWNED) { 1191 writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset); 1192 1193 /* Wait for 1 second with 10 microsecond polling interval */ 1194 timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED, 1195 0, 1000000, 10); 1196 1197 /* Assume a buggy BIOS and take HC ownership anyway */ 1198 if (timeout) { 1199 dev_warn(&pdev->dev, 1200 "xHCI BIOS handoff failed (BIOS bug ?) %08x\n", 1201 val); 1202 writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset); 1203 } 1204 } 1205 1206 val = readl(base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); 1207 /* Mask off (turn off) any enabled SMIs */ 1208 val &= XHCI_LEGACY_DISABLE_SMI; 1209 /* Mask all SMI events bits, RW1C */ 1210 val |= XHCI_LEGACY_SMI_EVENTS; 1211 /* Disable any BIOS SMIs and clear all SMI events*/ 1212 writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); 1213 1214hc_init: 1215 if (pdev->vendor == PCI_VENDOR_ID_INTEL) 1216 usb_enable_intel_xhci_ports(pdev); 1217 1218 op_reg_base = base + XHCI_HC_LENGTH(readl(base)); 1219 1220 /* Wait for the host controller to be ready before writing any 1221 * operational or runtime registers. Wait 5 seconds and no more. 1222 */ 1223 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0, 1224 5000000, 10); 1225 /* Assume a buggy HC and start HC initialization anyway */ 1226 if (timeout) { 1227 val = readl(op_reg_base + XHCI_STS_OFFSET); 1228 dev_warn(&pdev->dev, 1229 "xHCI HW not ready after 5 sec (HC bug?) status = 0x%x\n", 1230 val); 1231 } 1232 1233 /* Send the halt and disable interrupts command */ 1234 val = readl(op_reg_base + XHCI_CMD_OFFSET); 1235 val &= ~(XHCI_CMD_RUN | XHCI_IRQS); 1236 writel(val, op_reg_base + XHCI_CMD_OFFSET); 1237 1238 /* Wait for the HC to halt - poll every 125 usec (one microframe). */ 1239 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1, 1240 XHCI_MAX_HALT_USEC, 125); 1241 if (timeout) { 1242 val = readl(op_reg_base + XHCI_STS_OFFSET); 1243 dev_warn(&pdev->dev, 1244 "xHCI HW did not halt within %d usec status = 0x%x\n", 1245 XHCI_MAX_HALT_USEC, val); 1246 } 1247 1248iounmap: 1249 iounmap(base); 1250} 1251 1252static void quirk_usb_early_handoff(struct pci_dev *pdev) 1253{ 1254 struct device_node *parent; 1255 bool is_rpi; 1256 1257 /* Skip Netlogic mips SoC's internal PCI USB controller. 1258 * This device does not need/support EHCI/OHCI handoff 1259 */ 1260 if (pdev->vendor == 0x184e) /* vendor Netlogic */ 1261 return; 1262 1263 /* 1264 * Bypass the Raspberry Pi 4 controller xHCI controller, things are 1265 * taken care of by the board's co-processor. 1266 */ 1267 if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483) { 1268 parent = of_get_parent(pdev->bus->dev.of_node); 1269 is_rpi = of_device_is_compatible(parent, "brcm,bcm2711-pcie"); 1270 of_node_put(parent); 1271 if (is_rpi) 1272 return; 1273 } 1274 1275 if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI && 1276 pdev->class != PCI_CLASS_SERIAL_USB_OHCI && 1277 pdev->class != PCI_CLASS_SERIAL_USB_EHCI && 1278 pdev->class != PCI_CLASS_SERIAL_USB_XHCI) 1279 return; 1280 1281 if (pci_enable_device(pdev) < 0) { 1282 dev_warn(&pdev->dev, 1283 "Can't enable PCI device, BIOS handoff failed.\n"); 1284 return; 1285 } 1286 if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI) 1287 quirk_usb_handoff_uhci(pdev); 1288 else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI) 1289 quirk_usb_handoff_ohci(pdev); 1290 else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI) 1291 quirk_usb_disable_ehci(pdev); 1292 else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI) 1293 quirk_usb_handoff_xhci(pdev); 1294 pci_disable_device(pdev); 1295} 1296DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, 1297 PCI_CLASS_SERIAL_USB, 8, quirk_usb_early_handoff); 1298