1 // SPDX-License-Identifier: GPL-2.0 2 /* Various workarounds for chipset bugs. 3 This code runs very early and can't use the regular PCI subsystem 4 The entries are keyed to PCI bridges which usually identify chipsets 5 uniquely. 6 This is only for whole classes of chipsets with specific problems which 7 need early invasive action (e.g. before the timers are initialized). 8 Most PCI device specific workarounds can be done later and should be 9 in standard PCI quirks 10 Mainboard specific bugs should be handled by DMI entries. 11 CPU specific bugs in setup.c */ 12 13 #include <linux/pci.h> 14 #include <linux/acpi.h> 15 #include <linux/delay.h> 16 #include <linux/pci_ids.h> 17 #include <linux/bcma/bcma.h> 18 #include <linux/bcma/bcma_regs.h> 19 #include <linux/platform_data/x86/apple.h> 20 #include <drm/i915_drm.h> 21 #include <asm/pci-direct.h> 22 #include <asm/dma.h> 23 #include <asm/io_apic.h> 24 #include <asm/apic.h> 25 #include <asm/hpet.h> 26 #include <asm/iommu.h> 27 #include <asm/gart.h> 28 #include <asm/irq_remapping.h> 29 #include <asm/early_ioremap.h> 30 31 static void __init fix_hypertransport_config(int num, int slot, int func) 32 { 33 u32 htcfg; 34 /* 35 * we found a hypertransport bus 36 * make sure that we are broadcasting 37 * interrupts to all cpus on the ht bus 38 * if we're using extended apic ids 39 */ 40 htcfg = read_pci_config(num, slot, func, 0x68); 41 if (htcfg & (1 << 18)) { 42 printk(KERN_INFO "Detected use of extended apic ids " 43 "on hypertransport bus\n"); 44 if ((htcfg & (1 << 17)) == 0) { 45 printk(KERN_INFO "Enabling hypertransport extended " 46 "apic interrupt broadcast\n"); 47 printk(KERN_INFO "Note this is a bios bug, " 48 "please contact your hw vendor\n"); 49 htcfg |= (1 << 17); 50 write_pci_config(num, slot, func, 0x68, htcfg); 51 } 52 } 53 54 55 } 56 57 static void __init via_bugs(int num, int slot, int func) 58 { 59 #ifdef CONFIG_GART_IOMMU 60 if ((max_pfn > MAX_DMA32_PFN || force_iommu) && 61 !gart_iommu_aperture_allowed) { 62 printk(KERN_INFO 63 "Looks like a VIA chipset. Disabling IOMMU." 64 " Override with iommu=allowed\n"); 65 gart_iommu_aperture_disabled = 1; 66 } 67 #endif 68 } 69 70 #ifdef CONFIG_ACPI 71 #ifdef CONFIG_X86_IO_APIC 72 73 static int __init nvidia_hpet_check(struct acpi_table_header *header) 74 { 75 return 0; 76 } 77 #endif /* CONFIG_X86_IO_APIC */ 78 #endif /* CONFIG_ACPI */ 79 80 static void __init nvidia_bugs(int num, int slot, int func) 81 { 82 #ifdef CONFIG_ACPI 83 #ifdef CONFIG_X86_IO_APIC 84 /* 85 * Only applies to Nvidia root ports (bus 0) and not to 86 * Nvidia graphics cards with PCI ports on secondary buses. 87 */ 88 if (num) 89 return; 90 91 /* 92 * All timer overrides on Nvidia are 93 * wrong unless HPET is enabled. 94 * Unfortunately that's not true on many Asus boards. 95 * We don't know yet how to detect this automatically, but 96 * at least allow a command line override. 97 */ 98 if (acpi_use_timer_override) 99 return; 100 101 if (acpi_table_parse(ACPI_SIG_HPET, nvidia_hpet_check)) { 102 acpi_skip_timer_override = 1; 103 printk(KERN_INFO "Nvidia board " 104 "detected. Ignoring ACPI " 105 "timer override.\n"); 106 printk(KERN_INFO "If you got timer trouble " 107 "try acpi_use_timer_override\n"); 108 } 109 #endif 110 #endif 111 /* RED-PEN skip them on mptables too? */ 112 113 } 114 115 #if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC) 116 static u32 __init ati_ixp4x0_rev(int num, int slot, int func) 117 { 118 u32 d; 119 u8 b; 120 121 b = read_pci_config_byte(num, slot, func, 0xac); 122 b &= ~(1<<5); 123 write_pci_config_byte(num, slot, func, 0xac, b); 124 125 d = read_pci_config(num, slot, func, 0x70); 126 d |= 1<<8; 127 write_pci_config(num, slot, func, 0x70, d); 128 129 d = read_pci_config(num, slot, func, 0x8); 130 d &= 0xff; 131 return d; 132 } 133 134 static void __init ati_bugs(int num, int slot, int func) 135 { 136 u32 d; 137 u8 b; 138 139 if (acpi_use_timer_override) 140 return; 141 142 d = ati_ixp4x0_rev(num, slot, func); 143 if (d < 0x82) 144 acpi_skip_timer_override = 1; 145 else { 146 /* check for IRQ0 interrupt swap */ 147 outb(0x72, 0xcd6); b = inb(0xcd7); 148 if (!(b & 0x2)) 149 acpi_skip_timer_override = 1; 150 } 151 152 if (acpi_skip_timer_override) { 153 printk(KERN_INFO "SB4X0 revision 0x%x\n", d); 154 printk(KERN_INFO "Ignoring ACPI timer override.\n"); 155 printk(KERN_INFO "If you got timer trouble " 156 "try acpi_use_timer_override\n"); 157 } 158 } 159 160 static u32 __init ati_sbx00_rev(int num, int slot, int func) 161 { 162 u32 d; 163 164 d = read_pci_config(num, slot, func, 0x8); 165 d &= 0xff; 166 167 return d; 168 } 169 170 static void __init ati_bugs_contd(int num, int slot, int func) 171 { 172 u32 d, rev; 173 174 rev = ati_sbx00_rev(num, slot, func); 175 if (rev >= 0x40) 176 acpi_fix_pin2_polarity = 1; 177 178 /* 179 * SB600: revisions 0x11, 0x12, 0x13, 0x14, ... 180 * SB700: revisions 0x39, 0x3a, ... 181 * SB800: revisions 0x40, 0x41, ... 182 */ 183 if (rev >= 0x39) 184 return; 185 186 if (acpi_use_timer_override) 187 return; 188 189 /* check for IRQ0 interrupt swap */ 190 d = read_pci_config(num, slot, func, 0x64); 191 if (!(d & (1<<14))) 192 acpi_skip_timer_override = 1; 193 194 if (acpi_skip_timer_override) { 195 printk(KERN_INFO "SB600 revision 0x%x\n", rev); 196 printk(KERN_INFO "Ignoring ACPI timer override.\n"); 197 printk(KERN_INFO "If you got timer trouble " 198 "try acpi_use_timer_override\n"); 199 } 200 } 201 #else 202 static void __init ati_bugs(int num, int slot, int func) 203 { 204 } 205 206 static void __init ati_bugs_contd(int num, int slot, int func) 207 { 208 } 209 #endif 210 211 static void __init intel_remapping_check(int num, int slot, int func) 212 { 213 u8 revision; 214 u16 device; 215 216 device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID); 217 revision = read_pci_config_byte(num, slot, func, PCI_REVISION_ID); 218 219 /* 220 * Revision <= 13 of all triggering devices id in this quirk 221 * have a problem draining interrupts when irq remapping is 222 * enabled, and should be flagged as broken. Additionally 223 * revision 0x22 of device id 0x3405 has this problem. 224 */ 225 if (revision <= 0x13) 226 set_irq_remapping_broken(); 227 else if (device == 0x3405 && revision == 0x22) 228 set_irq_remapping_broken(); 229 } 230 231 /* 232 * Systems with Intel graphics controllers set aside memory exclusively 233 * for gfx driver use. This memory is not marked in the E820 as reserved 234 * or as RAM, and so is subject to overlap from E820 manipulation later 235 * in the boot process. On some systems, MMIO space is allocated on top, 236 * despite the efforts of the "RAM buffer" approach, which simply rounds 237 * memory boundaries up to 64M to try to catch space that may decode 238 * as RAM and so is not suitable for MMIO. 239 */ 240 241 #define KB(x) ((x) * 1024UL) 242 #define MB(x) (KB (KB (x))) 243 244 static resource_size_t __init i830_tseg_size(void) 245 { 246 u8 esmramc = read_pci_config_byte(0, 0, 0, I830_ESMRAMC); 247 248 if (!(esmramc & TSEG_ENABLE)) 249 return 0; 250 251 if (esmramc & I830_TSEG_SIZE_1M) 252 return MB(1); 253 else 254 return KB(512); 255 } 256 257 static resource_size_t __init i845_tseg_size(void) 258 { 259 u8 esmramc = read_pci_config_byte(0, 0, 0, I845_ESMRAMC); 260 u8 tseg_size = esmramc & I845_TSEG_SIZE_MASK; 261 262 if (!(esmramc & TSEG_ENABLE)) 263 return 0; 264 265 switch (tseg_size) { 266 case I845_TSEG_SIZE_512K: return KB(512); 267 case I845_TSEG_SIZE_1M: return MB(1); 268 default: 269 WARN(1, "Unknown ESMRAMC value: %x!\n", esmramc); 270 } 271 return 0; 272 } 273 274 static resource_size_t __init i85x_tseg_size(void) 275 { 276 u8 esmramc = read_pci_config_byte(0, 0, 0, I85X_ESMRAMC); 277 278 if (!(esmramc & TSEG_ENABLE)) 279 return 0; 280 281 return MB(1); 282 } 283 284 static resource_size_t __init i830_mem_size(void) 285 { 286 return read_pci_config_byte(0, 0, 0, I830_DRB3) * MB(32); 287 } 288 289 static resource_size_t __init i85x_mem_size(void) 290 { 291 return read_pci_config_byte(0, 0, 1, I85X_DRB3) * MB(32); 292 } 293 294 /* 295 * On 830/845/85x the stolen memory base isn't available in any 296 * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size. 297 */ 298 static resource_size_t __init i830_stolen_base(int num, int slot, int func, 299 resource_size_t stolen_size) 300 { 301 return i830_mem_size() - i830_tseg_size() - stolen_size; 302 } 303 304 static resource_size_t __init i845_stolen_base(int num, int slot, int func, 305 resource_size_t stolen_size) 306 { 307 return i830_mem_size() - i845_tseg_size() - stolen_size; 308 } 309 310 static resource_size_t __init i85x_stolen_base(int num, int slot, int func, 311 resource_size_t stolen_size) 312 { 313 return i85x_mem_size() - i85x_tseg_size() - stolen_size; 314 } 315 316 static resource_size_t __init i865_stolen_base(int num, int slot, int func, 317 resource_size_t stolen_size) 318 { 319 u16 toud = 0; 320 321 toud = read_pci_config_16(0, 0, 0, I865_TOUD); 322 323 return toud * KB(64) + i845_tseg_size(); 324 } 325 326 static resource_size_t __init gen3_stolen_base(int num, int slot, int func, 327 resource_size_t stolen_size) 328 { 329 u32 bsm; 330 331 /* Almost universally we can find the Graphics Base of Stolen Memory 332 * at register BSM (0x5c) in the igfx configuration space. On a few 333 * (desktop) machines this is also mirrored in the bridge device at 334 * different locations, or in the MCHBAR. 335 */ 336 bsm = read_pci_config(num, slot, func, INTEL_BSM); 337 338 return bsm & INTEL_BSM_MASK; 339 } 340 341 static resource_size_t __init gen11_stolen_base(int num, int slot, int func, 342 resource_size_t stolen_size) 343 { 344 u64 bsm; 345 346 bsm = read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW0); 347 bsm &= INTEL_BSM_MASK; 348 bsm |= (u64)read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW1) << 32; 349 350 return bsm; 351 } 352 353 static resource_size_t __init i830_stolen_size(int num, int slot, int func) 354 { 355 u16 gmch_ctrl; 356 u16 gms; 357 358 gmch_ctrl = read_pci_config_16(0, 0, 0, I830_GMCH_CTRL); 359 gms = gmch_ctrl & I830_GMCH_GMS_MASK; 360 361 switch (gms) { 362 case I830_GMCH_GMS_STOLEN_512: return KB(512); 363 case I830_GMCH_GMS_STOLEN_1024: return MB(1); 364 case I830_GMCH_GMS_STOLEN_8192: return MB(8); 365 /* local memory isn't part of the normal address space */ 366 case I830_GMCH_GMS_LOCAL: return 0; 367 default: 368 WARN(1, "Unknown GMCH_CTRL value: %x!\n", gmch_ctrl); 369 } 370 371 return 0; 372 } 373 374 static resource_size_t __init gen3_stolen_size(int num, int slot, int func) 375 { 376 u16 gmch_ctrl; 377 u16 gms; 378 379 gmch_ctrl = read_pci_config_16(0, 0, 0, I830_GMCH_CTRL); 380 gms = gmch_ctrl & I855_GMCH_GMS_MASK; 381 382 switch (gms) { 383 case I855_GMCH_GMS_STOLEN_1M: return MB(1); 384 case I855_GMCH_GMS_STOLEN_4M: return MB(4); 385 case I855_GMCH_GMS_STOLEN_8M: return MB(8); 386 case I855_GMCH_GMS_STOLEN_16M: return MB(16); 387 case I855_GMCH_GMS_STOLEN_32M: return MB(32); 388 case I915_GMCH_GMS_STOLEN_48M: return MB(48); 389 case I915_GMCH_GMS_STOLEN_64M: return MB(64); 390 case G33_GMCH_GMS_STOLEN_128M: return MB(128); 391 case G33_GMCH_GMS_STOLEN_256M: return MB(256); 392 case INTEL_GMCH_GMS_STOLEN_96M: return MB(96); 393 case INTEL_GMCH_GMS_STOLEN_160M:return MB(160); 394 case INTEL_GMCH_GMS_STOLEN_224M:return MB(224); 395 case INTEL_GMCH_GMS_STOLEN_352M:return MB(352); 396 default: 397 WARN(1, "Unknown GMCH_CTRL value: %x!\n", gmch_ctrl); 398 } 399 400 return 0; 401 } 402 403 static resource_size_t __init gen6_stolen_size(int num, int slot, int func) 404 { 405 u16 gmch_ctrl; 406 u16 gms; 407 408 gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL); 409 gms = (gmch_ctrl >> SNB_GMCH_GMS_SHIFT) & SNB_GMCH_GMS_MASK; 410 411 return gms * MB(32); 412 } 413 414 static resource_size_t __init gen8_stolen_size(int num, int slot, int func) 415 { 416 u16 gmch_ctrl; 417 u16 gms; 418 419 gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL); 420 gms = (gmch_ctrl >> BDW_GMCH_GMS_SHIFT) & BDW_GMCH_GMS_MASK; 421 422 return gms * MB(32); 423 } 424 425 static resource_size_t __init chv_stolen_size(int num, int slot, int func) 426 { 427 u16 gmch_ctrl; 428 u16 gms; 429 430 gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL); 431 gms = (gmch_ctrl >> SNB_GMCH_GMS_SHIFT) & SNB_GMCH_GMS_MASK; 432 433 /* 434 * 0x0 to 0x10: 32MB increments starting at 0MB 435 * 0x11 to 0x16: 4MB increments starting at 8MB 436 * 0x17 to 0x1d: 4MB increments start at 36MB 437 */ 438 if (gms < 0x11) 439 return gms * MB(32); 440 else if (gms < 0x17) 441 return (gms - 0x11) * MB(4) + MB(8); 442 else 443 return (gms - 0x17) * MB(4) + MB(36); 444 } 445 446 static resource_size_t __init gen9_stolen_size(int num, int slot, int func) 447 { 448 u16 gmch_ctrl; 449 u16 gms; 450 451 gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL); 452 gms = (gmch_ctrl >> BDW_GMCH_GMS_SHIFT) & BDW_GMCH_GMS_MASK; 453 454 /* 0x0 to 0xef: 32MB increments starting at 0MB */ 455 /* 0xf0 to 0xfe: 4MB increments starting at 4MB */ 456 if (gms < 0xf0) 457 return gms * MB(32); 458 else 459 return (gms - 0xf0) * MB(4) + MB(4); 460 } 461 462 struct intel_early_ops { 463 resource_size_t (*stolen_size)(int num, int slot, int func); 464 resource_size_t (*stolen_base)(int num, int slot, int func, 465 resource_size_t size); 466 }; 467 468 static const struct intel_early_ops i830_early_ops __initconst = { 469 .stolen_base = i830_stolen_base, 470 .stolen_size = i830_stolen_size, 471 }; 472 473 static const struct intel_early_ops i845_early_ops __initconst = { 474 .stolen_base = i845_stolen_base, 475 .stolen_size = i830_stolen_size, 476 }; 477 478 static const struct intel_early_ops i85x_early_ops __initconst = { 479 .stolen_base = i85x_stolen_base, 480 .stolen_size = gen3_stolen_size, 481 }; 482 483 static const struct intel_early_ops i865_early_ops __initconst = { 484 .stolen_base = i865_stolen_base, 485 .stolen_size = gen3_stolen_size, 486 }; 487 488 static const struct intel_early_ops gen3_early_ops __initconst = { 489 .stolen_base = gen3_stolen_base, 490 .stolen_size = gen3_stolen_size, 491 }; 492 493 static const struct intel_early_ops gen6_early_ops __initconst = { 494 .stolen_base = gen3_stolen_base, 495 .stolen_size = gen6_stolen_size, 496 }; 497 498 static const struct intel_early_ops gen8_early_ops __initconst = { 499 .stolen_base = gen3_stolen_base, 500 .stolen_size = gen8_stolen_size, 501 }; 502 503 static const struct intel_early_ops gen9_early_ops __initconst = { 504 .stolen_base = gen3_stolen_base, 505 .stolen_size = gen9_stolen_size, 506 }; 507 508 static const struct intel_early_ops chv_early_ops __initconst = { 509 .stolen_base = gen3_stolen_base, 510 .stolen_size = chv_stolen_size, 511 }; 512 513 static const struct intel_early_ops gen11_early_ops __initconst = { 514 .stolen_base = gen11_stolen_base, 515 .stolen_size = gen9_stolen_size, 516 }; 517 518 static const struct pci_device_id intel_early_ids[] __initconst = { 519 INTEL_I830_IDS(&i830_early_ops), 520 INTEL_I845G_IDS(&i845_early_ops), 521 INTEL_I85X_IDS(&i85x_early_ops), 522 INTEL_I865G_IDS(&i865_early_ops), 523 INTEL_I915G_IDS(&gen3_early_ops), 524 INTEL_I915GM_IDS(&gen3_early_ops), 525 INTEL_I945G_IDS(&gen3_early_ops), 526 INTEL_I945GM_IDS(&gen3_early_ops), 527 INTEL_VLV_IDS(&gen6_early_ops), 528 INTEL_PINEVIEW_IDS(&gen3_early_ops), 529 INTEL_I965G_IDS(&gen3_early_ops), 530 INTEL_G33_IDS(&gen3_early_ops), 531 INTEL_I965GM_IDS(&gen3_early_ops), 532 INTEL_GM45_IDS(&gen3_early_ops), 533 INTEL_G45_IDS(&gen3_early_ops), 534 INTEL_IRONLAKE_D_IDS(&gen3_early_ops), 535 INTEL_IRONLAKE_M_IDS(&gen3_early_ops), 536 INTEL_SNB_D_IDS(&gen6_early_ops), 537 INTEL_SNB_M_IDS(&gen6_early_ops), 538 INTEL_IVB_M_IDS(&gen6_early_ops), 539 INTEL_IVB_D_IDS(&gen6_early_ops), 540 INTEL_HSW_IDS(&gen6_early_ops), 541 INTEL_BDW_IDS(&gen8_early_ops), 542 INTEL_CHV_IDS(&chv_early_ops), 543 INTEL_SKL_IDS(&gen9_early_ops), 544 INTEL_BXT_IDS(&gen9_early_ops), 545 INTEL_KBL_IDS(&gen9_early_ops), 546 INTEL_CFL_IDS(&gen9_early_ops), 547 INTEL_GLK_IDS(&gen9_early_ops), 548 INTEL_CNL_IDS(&gen9_early_ops), 549 INTEL_ICL_11_IDS(&gen11_early_ops), 550 }; 551 552 struct resource intel_graphics_stolen_res __ro_after_init = DEFINE_RES_MEM(0, 0); 553 EXPORT_SYMBOL(intel_graphics_stolen_res); 554 555 static void __init 556 intel_graphics_stolen(int num, int slot, int func, 557 const struct intel_early_ops *early_ops) 558 { 559 resource_size_t base, size; 560 resource_size_t end; 561 562 size = early_ops->stolen_size(num, slot, func); 563 base = early_ops->stolen_base(num, slot, func, size); 564 565 if (!size || !base) 566 return; 567 568 end = base + size - 1; 569 570 intel_graphics_stolen_res.start = base; 571 intel_graphics_stolen_res.end = end; 572 573 printk(KERN_INFO "Reserving Intel graphics memory at %pR\n", 574 &intel_graphics_stolen_res); 575 576 /* Mark this space as reserved */ 577 e820__range_add(base, size, E820_TYPE_RESERVED); 578 e820__update_table(e820_table); 579 } 580 581 static void __init intel_graphics_quirks(int num, int slot, int func) 582 { 583 const struct intel_early_ops *early_ops; 584 u16 device; 585 int i; 586 587 device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID); 588 589 for (i = 0; i < ARRAY_SIZE(intel_early_ids); i++) { 590 kernel_ulong_t driver_data = intel_early_ids[i].driver_data; 591 592 if (intel_early_ids[i].device != device) 593 continue; 594 595 early_ops = (typeof(early_ops))driver_data; 596 597 intel_graphics_stolen(num, slot, func, early_ops); 598 599 return; 600 } 601 } 602 603 static void __init force_disable_hpet(int num, int slot, int func) 604 { 605 #ifdef CONFIG_HPET_TIMER 606 boot_hpet_disable = true; 607 pr_info("x86/hpet: Will disable the HPET for this platform because it's not reliable\n"); 608 #endif 609 } 610 611 #define BCM4331_MMIO_SIZE 16384 612 #define BCM4331_PM_CAP 0x40 613 #define bcma_aread32(reg) ioread32(mmio + 1 * BCMA_CORE_SIZE + reg) 614 #define bcma_awrite32(reg, val) iowrite32(val, mmio + 1 * BCMA_CORE_SIZE + reg) 615 616 static void __init apple_airport_reset(int bus, int slot, int func) 617 { 618 void __iomem *mmio; 619 u16 pmcsr; 620 u64 addr; 621 int i; 622 623 if (!x86_apple_machine) 624 return; 625 626 /* Card may have been put into PCI_D3hot by grub quirk */ 627 pmcsr = read_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL); 628 629 if ((pmcsr & PCI_PM_CTRL_STATE_MASK) != PCI_D0) { 630 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 631 write_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL, pmcsr); 632 mdelay(10); 633 634 pmcsr = read_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL); 635 if ((pmcsr & PCI_PM_CTRL_STATE_MASK) != PCI_D0) { 636 pr_err("pci 0000:%02x:%02x.%d: Cannot power up Apple AirPort card\n", 637 bus, slot, func); 638 return; 639 } 640 } 641 642 addr = read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_0); 643 addr |= (u64)read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_1) << 32; 644 addr &= PCI_BASE_ADDRESS_MEM_MASK; 645 646 mmio = early_ioremap(addr, BCM4331_MMIO_SIZE); 647 if (!mmio) { 648 pr_err("pci 0000:%02x:%02x.%d: Cannot iomap Apple AirPort card\n", 649 bus, slot, func); 650 return; 651 } 652 653 pr_info("Resetting Apple AirPort card (left enabled by EFI)\n"); 654 655 for (i = 0; bcma_aread32(BCMA_RESET_ST) && i < 30; i++) 656 udelay(10); 657 658 bcma_awrite32(BCMA_RESET_CTL, BCMA_RESET_CTL_RESET); 659 bcma_aread32(BCMA_RESET_CTL); 660 udelay(1); 661 662 bcma_awrite32(BCMA_RESET_CTL, 0); 663 bcma_aread32(BCMA_RESET_CTL); 664 udelay(10); 665 666 early_iounmap(mmio, BCM4331_MMIO_SIZE); 667 } 668 669 #define QFLAG_APPLY_ONCE 0x1 670 #define QFLAG_APPLIED 0x2 671 #define QFLAG_DONE (QFLAG_APPLY_ONCE|QFLAG_APPLIED) 672 struct chipset { 673 u32 vendor; 674 u32 device; 675 u32 class; 676 u32 class_mask; 677 u32 flags; 678 void (*f)(int num, int slot, int func); 679 }; 680 681 static struct chipset early_qrk[] __initdata = { 682 { PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, 683 PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, nvidia_bugs }, 684 { PCI_VENDOR_ID_VIA, PCI_ANY_ID, 685 PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, via_bugs }, 686 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB, 687 PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config }, 688 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS, 689 PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs }, 690 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS, 691 PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd }, 692 { PCI_VENDOR_ID_INTEL, 0x3403, PCI_CLASS_BRIDGE_HOST, 693 PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check }, 694 { PCI_VENDOR_ID_INTEL, 0x3405, PCI_CLASS_BRIDGE_HOST, 695 PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check }, 696 { PCI_VENDOR_ID_INTEL, 0x3406, PCI_CLASS_BRIDGE_HOST, 697 PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check }, 698 { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA, PCI_ANY_ID, 699 QFLAG_APPLY_ONCE, intel_graphics_quirks }, 700 /* 701 * HPET on the current version of the Baytrail platform has accuracy 702 * problems: it will halt in deep idle state - so we disable it. 703 * 704 * More details can be found in section 18.10.1.3 of the datasheet: 705 * 706 * http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z8000-datasheet-vol-1.pdf 707 */ 708 { PCI_VENDOR_ID_INTEL, 0x0f00, 709 PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet}, 710 { PCI_VENDOR_ID_BROADCOM, 0x4331, 711 PCI_CLASS_NETWORK_OTHER, PCI_ANY_ID, 0, apple_airport_reset}, 712 {} 713 }; 714 715 static void __init early_pci_scan_bus(int bus); 716 717 /** 718 * check_dev_quirk - apply early quirks to a given PCI device 719 * @num: bus number 720 * @slot: slot number 721 * @func: PCI function 722 * 723 * Check the vendor & device ID against the early quirks table. 724 * 725 * If the device is single function, let early_pci_scan_bus() know so we don't 726 * poke at this device again. 727 */ 728 static int __init check_dev_quirk(int num, int slot, int func) 729 { 730 u16 class; 731 u16 vendor; 732 u16 device; 733 u8 type; 734 u8 sec; 735 int i; 736 737 class = read_pci_config_16(num, slot, func, PCI_CLASS_DEVICE); 738 739 if (class == 0xffff) 740 return -1; /* no class, treat as single function */ 741 742 vendor = read_pci_config_16(num, slot, func, PCI_VENDOR_ID); 743 744 device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID); 745 746 for (i = 0; early_qrk[i].f != NULL; i++) { 747 if (((early_qrk[i].vendor == PCI_ANY_ID) || 748 (early_qrk[i].vendor == vendor)) && 749 ((early_qrk[i].device == PCI_ANY_ID) || 750 (early_qrk[i].device == device)) && 751 (!((early_qrk[i].class ^ class) & 752 early_qrk[i].class_mask))) { 753 if ((early_qrk[i].flags & 754 QFLAG_DONE) != QFLAG_DONE) 755 early_qrk[i].f(num, slot, func); 756 early_qrk[i].flags |= QFLAG_APPLIED; 757 } 758 } 759 760 type = read_pci_config_byte(num, slot, func, 761 PCI_HEADER_TYPE); 762 763 if ((type & 0x7f) == PCI_HEADER_TYPE_BRIDGE) { 764 sec = read_pci_config_byte(num, slot, func, PCI_SECONDARY_BUS); 765 if (sec > num) 766 early_pci_scan_bus(sec); 767 } 768 769 if (!(type & 0x80)) 770 return -1; 771 772 return 0; 773 } 774 775 static void __init early_pci_scan_bus(int bus) 776 { 777 int slot, func; 778 779 /* Poor man's PCI discovery */ 780 for (slot = 0; slot < 32; slot++) 781 for (func = 0; func < 8; func++) { 782 /* Only probe function 0 on single fn devices */ 783 if (check_dev_quirk(bus, slot, func)) 784 break; 785 } 786 } 787 788 void __init early_quirks(void) 789 { 790 if (!early_pci_allowed()) 791 return; 792 793 early_pci_scan_bus(0); 794 } 795