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/intel/i915_drm.h> 21 #include <drm/intel/i915_pciids.h> 22 #include <asm/pci-direct.h> 23 #include <asm/dma.h> 24 #include <asm/io_apic.h> 25 #include <asm/apic.h> 26 #include <asm/hpet.h> 27 #include <asm/iommu.h> 28 #include <asm/gart.h> 29 #include <asm/irq_remapping.h> 30 #include <asm/early_ioremap.h> 31 32 static void __init fix_hypertransport_config(int num, int slot, int func) 33 { 34 u32 htcfg; 35 /* 36 * we found a hypertransport bus 37 * make sure that we are broadcasting 38 * interrupts to all cpus on the ht bus 39 * if we're using extended apic ids 40 */ 41 htcfg = read_pci_config(num, slot, func, 0x68); 42 if (htcfg & (1 << 18)) { 43 printk(KERN_INFO "Detected use of extended apic ids " 44 "on hypertransport bus\n"); 45 if ((htcfg & (1 << 17)) == 0) { 46 printk(KERN_INFO "Enabling hypertransport extended " 47 "apic interrupt broadcast\n"); 48 printk(KERN_INFO "Note this is a bios bug, " 49 "please contact your hw vendor\n"); 50 htcfg |= (1 << 17); 51 write_pci_config(num, slot, func, 0x68, htcfg); 52 } 53 } 54 55 56 } 57 58 static void __init via_bugs(int num, int slot, int func) 59 { 60 #ifdef CONFIG_GART_IOMMU 61 if ((max_pfn > MAX_DMA32_PFN || force_iommu) && 62 !gart_iommu_aperture_allowed) { 63 printk(KERN_INFO 64 "Looks like a VIA chipset. Disabling IOMMU." 65 " Override with iommu=allowed\n"); 66 gart_iommu_aperture_disabled = 1; 67 } 68 #endif 69 } 70 71 #ifdef CONFIG_ACPI 72 #ifdef CONFIG_X86_IO_APIC 73 74 static int __init nvidia_hpet_check(struct acpi_table_header *header) 75 { 76 return 0; 77 } 78 #endif /* CONFIG_X86_IO_APIC */ 79 #endif /* CONFIG_ACPI */ 80 81 static void __init nvidia_bugs(int num, int slot, int func) 82 { 83 #ifdef CONFIG_ACPI 84 #ifdef CONFIG_X86_IO_APIC 85 /* 86 * Only applies to Nvidia root ports (bus 0) and not to 87 * Nvidia graphics cards with PCI ports on secondary buses. 88 */ 89 if (num) 90 return; 91 92 /* 93 * All timer overrides on Nvidia are 94 * wrong unless HPET is enabled. 95 * Unfortunately that's not true on many Asus boards. 96 * We don't know yet how to detect this automatically, but 97 * at least allow a command line override. 98 */ 99 if (acpi_use_timer_override) 100 return; 101 102 if (acpi_table_parse(ACPI_SIG_HPET, nvidia_hpet_check)) { 103 acpi_skip_timer_override = 1; 104 printk(KERN_INFO "Nvidia board " 105 "detected. Ignoring ACPI " 106 "timer override.\n"); 107 printk(KERN_INFO "If you got timer trouble " 108 "try acpi_use_timer_override\n"); 109 } 110 #endif 111 #endif 112 /* RED-PEN skip them on mptables too? */ 113 114 } 115 116 #if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC) 117 static u32 __init ati_ixp4x0_rev(int num, int slot, int func) 118 { 119 u32 d; 120 u8 b; 121 122 b = read_pci_config_byte(num, slot, func, 0xac); 123 b &= ~(1<<5); 124 write_pci_config_byte(num, slot, func, 0xac, b); 125 126 d = read_pci_config(num, slot, func, 0x70); 127 d |= 1<<8; 128 write_pci_config(num, slot, func, 0x70, d); 129 130 d = read_pci_config(num, slot, func, 0x8); 131 d &= 0xff; 132 return d; 133 } 134 135 static void __init ati_bugs(int num, int slot, int func) 136 { 137 u32 d; 138 u8 b; 139 140 if (acpi_use_timer_override) 141 return; 142 143 d = ati_ixp4x0_rev(num, slot, func); 144 if (d < 0x82) 145 acpi_skip_timer_override = 1; 146 else { 147 /* check for IRQ0 interrupt swap */ 148 outb(0x72, 0xcd6); b = inb(0xcd7); 149 if (!(b & 0x2)) 150 acpi_skip_timer_override = 1; 151 } 152 153 if (acpi_skip_timer_override) { 154 printk(KERN_INFO "SB4X0 revision 0x%x\n", d); 155 printk(KERN_INFO "Ignoring ACPI timer override.\n"); 156 printk(KERN_INFO "If you got timer trouble " 157 "try acpi_use_timer_override\n"); 158 } 159 } 160 161 static u32 __init ati_sbx00_rev(int num, int slot, int func) 162 { 163 u32 d; 164 165 d = read_pci_config(num, slot, func, 0x8); 166 d &= 0xff; 167 168 return d; 169 } 170 171 static void __init ati_bugs_contd(int num, int slot, int func) 172 { 173 u32 d, rev; 174 175 rev = ati_sbx00_rev(num, slot, func); 176 if (rev >= 0x40) 177 acpi_fix_pin2_polarity = 1; 178 179 /* 180 * SB600: revisions 0x11, 0x12, 0x13, 0x14, ... 181 * SB700: revisions 0x39, 0x3a, ... 182 * SB800: revisions 0x40, 0x41, ... 183 */ 184 if (rev >= 0x39) 185 return; 186 187 if (acpi_use_timer_override) 188 return; 189 190 /* check for IRQ0 interrupt swap */ 191 d = read_pci_config(num, slot, func, 0x64); 192 if (!(d & (1<<14))) 193 acpi_skip_timer_override = 1; 194 195 if (acpi_skip_timer_override) { 196 printk(KERN_INFO "SB600 revision 0x%x\n", rev); 197 printk(KERN_INFO "Ignoring ACPI timer override.\n"); 198 printk(KERN_INFO "If you got timer trouble " 199 "try acpi_use_timer_override\n"); 200 } 201 } 202 #else 203 static void __init ati_bugs(int num, int slot, int func) 204 { 205 } 206 207 static void __init ati_bugs_contd(int num, int slot, int func) 208 { 209 } 210 #endif 211 212 static void __init intel_remapping_check(int num, int slot, int func) 213 { 214 u8 revision; 215 u16 device; 216 217 device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID); 218 revision = read_pci_config_byte(num, slot, func, PCI_REVISION_ID); 219 220 /* 221 * Revision <= 13 of all triggering devices id in this quirk 222 * have a problem draining interrupts when irq remapping is 223 * enabled, and should be flagged as broken. Additionally 224 * revision 0x22 of device id 0x3405 has this problem. 225 */ 226 if (revision <= 0x13) 227 set_irq_remapping_broken(); 228 else if (device == 0x3405 && revision == 0x22) 229 set_irq_remapping_broken(); 230 } 231 232 /* 233 * Systems with Intel graphics controllers set aside memory exclusively 234 * for gfx driver use. This memory is not marked in the E820 as reserved 235 * or as RAM, and so is subject to overlap from E820 manipulation later 236 * in the boot process. On some systems, MMIO space is allocated on top, 237 * despite the efforts of the "RAM buffer" approach, which simply rounds 238 * memory boundaries up to 64M to try to catch space that may decode 239 * as RAM and so is not suitable for MMIO. 240 */ 241 242 #define KB(x) ((x) * 1024UL) 243 #define MB(x) (KB (KB (x))) 244 245 static resource_size_t __init i830_tseg_size(void) 246 { 247 u8 esmramc = read_pci_config_byte(0, 0, 0, I830_ESMRAMC); 248 249 if (!(esmramc & TSEG_ENABLE)) 250 return 0; 251 252 if (esmramc & I830_TSEG_SIZE_1M) 253 return MB(1); 254 else 255 return KB(512); 256 } 257 258 static resource_size_t __init i845_tseg_size(void) 259 { 260 u8 esmramc = read_pci_config_byte(0, 0, 0, I845_ESMRAMC); 261 u8 tseg_size = esmramc & I845_TSEG_SIZE_MASK; 262 263 if (!(esmramc & TSEG_ENABLE)) 264 return 0; 265 266 switch (tseg_size) { 267 case I845_TSEG_SIZE_512K: return KB(512); 268 case I845_TSEG_SIZE_1M: return MB(1); 269 default: 270 WARN(1, "Unknown ESMRAMC value: %x!\n", esmramc); 271 } 272 return 0; 273 } 274 275 static resource_size_t __init i85x_tseg_size(void) 276 { 277 u8 esmramc = read_pci_config_byte(0, 0, 0, I85X_ESMRAMC); 278 279 if (!(esmramc & TSEG_ENABLE)) 280 return 0; 281 282 return MB(1); 283 } 284 285 static resource_size_t __init i830_mem_size(void) 286 { 287 return read_pci_config_byte(0, 0, 0, I830_DRB3) * MB(32); 288 } 289 290 static resource_size_t __init i85x_mem_size(void) 291 { 292 return read_pci_config_byte(0, 0, 1, I85X_DRB3) * MB(32); 293 } 294 295 /* 296 * On 830/845/85x the stolen memory base isn't available in any 297 * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size. 298 */ 299 static resource_size_t __init i830_stolen_base(int num, int slot, int func, 300 resource_size_t stolen_size) 301 { 302 return i830_mem_size() - i830_tseg_size() - stolen_size; 303 } 304 305 static resource_size_t __init i845_stolen_base(int num, int slot, int func, 306 resource_size_t stolen_size) 307 { 308 return i830_mem_size() - i845_tseg_size() - stolen_size; 309 } 310 311 static resource_size_t __init i85x_stolen_base(int num, int slot, int func, 312 resource_size_t stolen_size) 313 { 314 return i85x_mem_size() - i85x_tseg_size() - stolen_size; 315 } 316 317 static resource_size_t __init i865_stolen_base(int num, int slot, int func, 318 resource_size_t stolen_size) 319 { 320 u16 toud = 0; 321 322 toud = read_pci_config_16(0, 0, 0, I865_TOUD); 323 324 return toud * KB(64) + i845_tseg_size(); 325 } 326 327 static resource_size_t __init gen3_stolen_base(int num, int slot, int func, 328 resource_size_t stolen_size) 329 { 330 u32 bsm; 331 332 /* Almost universally we can find the Graphics Base of Stolen Memory 333 * at register BSM (0x5c) in the igfx configuration space. On a few 334 * (desktop) machines this is also mirrored in the bridge device at 335 * different locations, or in the MCHBAR. 336 */ 337 bsm = read_pci_config(num, slot, func, INTEL_BSM); 338 339 return bsm & INTEL_BSM_MASK; 340 } 341 342 static resource_size_t __init gen11_stolen_base(int num, int slot, int func, 343 resource_size_t stolen_size) 344 { 345 u64 bsm; 346 347 bsm = read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW0); 348 bsm &= INTEL_BSM_MASK; 349 bsm |= (u64)read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW1) << 32; 350 351 return bsm; 352 } 353 354 static resource_size_t __init i830_stolen_size(int num, int slot, int func) 355 { 356 u16 gmch_ctrl; 357 u16 gms; 358 359 gmch_ctrl = read_pci_config_16(0, 0, 0, I830_GMCH_CTRL); 360 gms = gmch_ctrl & I830_GMCH_GMS_MASK; 361 362 switch (gms) { 363 case I830_GMCH_GMS_STOLEN_512: return KB(512); 364 case I830_GMCH_GMS_STOLEN_1024: return MB(1); 365 case I830_GMCH_GMS_STOLEN_8192: return MB(8); 366 /* local memory isn't part of the normal address space */ 367 case I830_GMCH_GMS_LOCAL: return 0; 368 default: 369 WARN(1, "Unknown GMCH_CTRL value: %x!\n", gmch_ctrl); 370 } 371 372 return 0; 373 } 374 375 static resource_size_t __init gen3_stolen_size(int num, int slot, int func) 376 { 377 u16 gmch_ctrl; 378 u16 gms; 379 380 gmch_ctrl = read_pci_config_16(0, 0, 0, I830_GMCH_CTRL); 381 gms = gmch_ctrl & I855_GMCH_GMS_MASK; 382 383 switch (gms) { 384 case I855_GMCH_GMS_STOLEN_1M: return MB(1); 385 case I855_GMCH_GMS_STOLEN_4M: return MB(4); 386 case I855_GMCH_GMS_STOLEN_8M: return MB(8); 387 case I855_GMCH_GMS_STOLEN_16M: return MB(16); 388 case I855_GMCH_GMS_STOLEN_32M: return MB(32); 389 case I915_GMCH_GMS_STOLEN_48M: return MB(48); 390 case I915_GMCH_GMS_STOLEN_64M: return MB(64); 391 case G33_GMCH_GMS_STOLEN_128M: return MB(128); 392 case G33_GMCH_GMS_STOLEN_256M: return MB(256); 393 case INTEL_GMCH_GMS_STOLEN_96M: return MB(96); 394 case INTEL_GMCH_GMS_STOLEN_160M:return MB(160); 395 case INTEL_GMCH_GMS_STOLEN_224M:return MB(224); 396 case INTEL_GMCH_GMS_STOLEN_352M:return MB(352); 397 default: 398 WARN(1, "Unknown GMCH_CTRL value: %x!\n", gmch_ctrl); 399 } 400 401 return 0; 402 } 403 404 static resource_size_t __init gen6_stolen_size(int num, int slot, int func) 405 { 406 u16 gmch_ctrl; 407 u16 gms; 408 409 gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL); 410 gms = (gmch_ctrl >> SNB_GMCH_GMS_SHIFT) & SNB_GMCH_GMS_MASK; 411 412 return gms * MB(32); 413 } 414 415 static resource_size_t __init gen8_stolen_size(int num, int slot, int func) 416 { 417 u16 gmch_ctrl; 418 u16 gms; 419 420 gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL); 421 gms = (gmch_ctrl >> BDW_GMCH_GMS_SHIFT) & BDW_GMCH_GMS_MASK; 422 423 return gms * MB(32); 424 } 425 426 static resource_size_t __init chv_stolen_size(int num, int slot, int func) 427 { 428 u16 gmch_ctrl; 429 u16 gms; 430 431 gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL); 432 gms = (gmch_ctrl >> SNB_GMCH_GMS_SHIFT) & SNB_GMCH_GMS_MASK; 433 434 /* 435 * 0x0 to 0x10: 32MB increments starting at 0MB 436 * 0x11 to 0x16: 4MB increments starting at 8MB 437 * 0x17 to 0x1d: 4MB increments start at 36MB 438 */ 439 if (gms < 0x11) 440 return gms * MB(32); 441 else if (gms < 0x17) 442 return (gms - 0x11) * MB(4) + MB(8); 443 else 444 return (gms - 0x17) * MB(4) + MB(36); 445 } 446 447 static resource_size_t __init gen9_stolen_size(int num, int slot, int func) 448 { 449 u16 gmch_ctrl; 450 u16 gms; 451 452 gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL); 453 gms = (gmch_ctrl >> BDW_GMCH_GMS_SHIFT) & BDW_GMCH_GMS_MASK; 454 455 /* 0x0 to 0xef: 32MB increments starting at 0MB */ 456 /* 0xf0 to 0xfe: 4MB increments starting at 4MB */ 457 if (gms < 0xf0) 458 return gms * MB(32); 459 else 460 return (gms - 0xf0) * MB(4) + MB(4); 461 } 462 463 struct intel_early_ops { 464 resource_size_t (*stolen_size)(int num, int slot, int func); 465 resource_size_t (*stolen_base)(int num, int slot, int func, 466 resource_size_t size); 467 }; 468 469 static const struct intel_early_ops i830_early_ops __initconst = { 470 .stolen_base = i830_stolen_base, 471 .stolen_size = i830_stolen_size, 472 }; 473 474 static const struct intel_early_ops i845_early_ops __initconst = { 475 .stolen_base = i845_stolen_base, 476 .stolen_size = i830_stolen_size, 477 }; 478 479 static const struct intel_early_ops i85x_early_ops __initconst = { 480 .stolen_base = i85x_stolen_base, 481 .stolen_size = gen3_stolen_size, 482 }; 483 484 static const struct intel_early_ops i865_early_ops __initconst = { 485 .stolen_base = i865_stolen_base, 486 .stolen_size = gen3_stolen_size, 487 }; 488 489 static const struct intel_early_ops gen3_early_ops __initconst = { 490 .stolen_base = gen3_stolen_base, 491 .stolen_size = gen3_stolen_size, 492 }; 493 494 static const struct intel_early_ops gen6_early_ops __initconst = { 495 .stolen_base = gen3_stolen_base, 496 .stolen_size = gen6_stolen_size, 497 }; 498 499 static const struct intel_early_ops gen8_early_ops __initconst = { 500 .stolen_base = gen3_stolen_base, 501 .stolen_size = gen8_stolen_size, 502 }; 503 504 static const struct intel_early_ops gen9_early_ops __initconst = { 505 .stolen_base = gen3_stolen_base, 506 .stolen_size = gen9_stolen_size, 507 }; 508 509 static const struct intel_early_ops chv_early_ops __initconst = { 510 .stolen_base = gen3_stolen_base, 511 .stolen_size = chv_stolen_size, 512 }; 513 514 static const struct intel_early_ops gen11_early_ops __initconst = { 515 .stolen_base = gen11_stolen_base, 516 .stolen_size = gen9_stolen_size, 517 }; 518 519 /* Intel integrated GPUs for which we need to reserve "stolen memory" */ 520 static const struct pci_device_id intel_early_ids[] __initconst = { 521 INTEL_I830_IDS(INTEL_VGA_DEVICE, &i830_early_ops), 522 INTEL_I845G_IDS(INTEL_VGA_DEVICE, &i845_early_ops), 523 INTEL_I85X_IDS(INTEL_VGA_DEVICE, &i85x_early_ops), 524 INTEL_I865G_IDS(INTEL_VGA_DEVICE, &i865_early_ops), 525 INTEL_I915G_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 526 INTEL_I915GM_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 527 INTEL_I945G_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 528 INTEL_I945GM_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 529 INTEL_VLV_IDS(INTEL_VGA_DEVICE, &gen6_early_ops), 530 INTEL_PNV_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 531 INTEL_I965G_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 532 INTEL_G33_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 533 INTEL_I965GM_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 534 INTEL_GM45_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 535 INTEL_G45_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 536 INTEL_ILK_IDS(INTEL_VGA_DEVICE, &gen3_early_ops), 537 INTEL_SNB_IDS(INTEL_VGA_DEVICE, &gen6_early_ops), 538 INTEL_IVB_IDS(INTEL_VGA_DEVICE, &gen6_early_ops), 539 INTEL_HSW_IDS(INTEL_VGA_DEVICE, &gen6_early_ops), 540 INTEL_BDW_IDS(INTEL_VGA_DEVICE, &gen8_early_ops), 541 INTEL_CHV_IDS(INTEL_VGA_DEVICE, &chv_early_ops), 542 INTEL_SKL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops), 543 INTEL_BXT_IDS(INTEL_VGA_DEVICE, &gen9_early_ops), 544 INTEL_KBL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops), 545 INTEL_CFL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops), 546 INTEL_WHL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops), 547 INTEL_CML_IDS(INTEL_VGA_DEVICE, &gen9_early_ops), 548 INTEL_GLK_IDS(INTEL_VGA_DEVICE, &gen9_early_ops), 549 INTEL_CNL_IDS(INTEL_VGA_DEVICE, &gen9_early_ops), 550 INTEL_ICL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 551 INTEL_EHL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 552 INTEL_JSL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 553 INTEL_TGL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 554 INTEL_RKL_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 555 INTEL_ADLS_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 556 INTEL_ADLP_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 557 INTEL_ADLN_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 558 INTEL_RPLS_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 559 INTEL_RPLU_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 560 INTEL_RPLP_IDS(INTEL_VGA_DEVICE, &gen11_early_ops), 561 }; 562 563 struct resource intel_graphics_stolen_res __ro_after_init = DEFINE_RES_MEM(0, 0); 564 EXPORT_SYMBOL(intel_graphics_stolen_res); 565 566 static void __init 567 intel_graphics_stolen(int num, int slot, int func, 568 const struct intel_early_ops *early_ops) 569 { 570 resource_size_t base, size; 571 resource_size_t end; 572 573 size = early_ops->stolen_size(num, slot, func); 574 base = early_ops->stolen_base(num, slot, func, size); 575 576 if (!size || !base) 577 return; 578 579 end = base + size - 1; 580 581 intel_graphics_stolen_res.start = base; 582 intel_graphics_stolen_res.end = end; 583 584 printk(KERN_INFO "Reserving Intel graphics memory at %pR\n", 585 &intel_graphics_stolen_res); 586 587 /* Mark this space as reserved */ 588 e820__range_add(base, size, E820_TYPE_RESERVED); 589 e820__update_table(e820_table); 590 } 591 592 static void __init intel_graphics_quirks(int num, int slot, int func) 593 { 594 const struct intel_early_ops *early_ops; 595 u16 device; 596 int i; 597 598 /* 599 * Reserve "stolen memory" for an integrated GPU. If we've already 600 * found one, there's nothing to do for other (discrete) GPUs. 601 */ 602 if (resource_size(&intel_graphics_stolen_res)) 603 return; 604 605 device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID); 606 607 for (i = 0; i < ARRAY_SIZE(intel_early_ids); i++) { 608 kernel_ulong_t driver_data = intel_early_ids[i].driver_data; 609 610 if (intel_early_ids[i].device != device) 611 continue; 612 613 early_ops = (typeof(early_ops))driver_data; 614 615 intel_graphics_stolen(num, slot, func, early_ops); 616 617 return; 618 } 619 } 620 621 static void __init force_disable_hpet(int num, int slot, int func) 622 { 623 #ifdef CONFIG_HPET_TIMER 624 boot_hpet_disable = true; 625 pr_info("x86/hpet: Will disable the HPET for this platform because it's not reliable\n"); 626 #endif 627 } 628 629 #define BCM4331_MMIO_SIZE 16384 630 #define BCM4331_PM_CAP 0x40 631 #define bcma_aread32(reg) ioread32(mmio + 1 * BCMA_CORE_SIZE + reg) 632 #define bcma_awrite32(reg, val) iowrite32(val, mmio + 1 * BCMA_CORE_SIZE + reg) 633 634 static void __init apple_airport_reset(int bus, int slot, int func) 635 { 636 void __iomem *mmio; 637 u16 pmcsr; 638 u64 addr; 639 int i; 640 641 if (!x86_apple_machine) 642 return; 643 644 /* Card may have been put into PCI_D3hot by grub quirk */ 645 pmcsr = read_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL); 646 647 if ((pmcsr & PCI_PM_CTRL_STATE_MASK) != PCI_D0) { 648 pmcsr &= ~PCI_PM_CTRL_STATE_MASK; 649 write_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL, pmcsr); 650 mdelay(10); 651 652 pmcsr = read_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL); 653 if ((pmcsr & PCI_PM_CTRL_STATE_MASK) != PCI_D0) { 654 pr_err("pci 0000:%02x:%02x.%d: Cannot power up Apple AirPort card\n", 655 bus, slot, func); 656 return; 657 } 658 } 659 660 addr = read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_0); 661 addr |= (u64)read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_1) << 32; 662 addr &= PCI_BASE_ADDRESS_MEM_MASK; 663 664 mmio = early_ioremap(addr, BCM4331_MMIO_SIZE); 665 if (!mmio) { 666 pr_err("pci 0000:%02x:%02x.%d: Cannot iomap Apple AirPort card\n", 667 bus, slot, func); 668 return; 669 } 670 671 pr_info("Resetting Apple AirPort card (left enabled by EFI)\n"); 672 673 for (i = 0; bcma_aread32(BCMA_RESET_ST) && i < 30; i++) 674 udelay(10); 675 676 bcma_awrite32(BCMA_RESET_CTL, BCMA_RESET_CTL_RESET); 677 bcma_aread32(BCMA_RESET_CTL); 678 udelay(1); 679 680 bcma_awrite32(BCMA_RESET_CTL, 0); 681 bcma_aread32(BCMA_RESET_CTL); 682 udelay(10); 683 684 early_iounmap(mmio, BCM4331_MMIO_SIZE); 685 } 686 687 #define QFLAG_APPLY_ONCE 0x1 688 #define QFLAG_APPLIED 0x2 689 #define QFLAG_DONE (QFLAG_APPLY_ONCE|QFLAG_APPLIED) 690 struct chipset { 691 u32 vendor; 692 u32 device; 693 u32 class; 694 u32 class_mask; 695 u32 flags; 696 void (*f)(int num, int slot, int func); 697 }; 698 699 static struct chipset early_qrk[] __initdata = { 700 { PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, 701 PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, nvidia_bugs }, 702 { PCI_VENDOR_ID_VIA, PCI_ANY_ID, 703 PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, via_bugs }, 704 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB, 705 PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config }, 706 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS, 707 PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs }, 708 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS, 709 PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd }, 710 { PCI_VENDOR_ID_INTEL, 0x3403, PCI_CLASS_BRIDGE_HOST, 711 PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check }, 712 { PCI_VENDOR_ID_INTEL, 0x3405, PCI_CLASS_BRIDGE_HOST, 713 PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check }, 714 { PCI_VENDOR_ID_INTEL, 0x3406, PCI_CLASS_BRIDGE_HOST, 715 PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check }, 716 { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA, PCI_ANY_ID, 717 0, intel_graphics_quirks }, 718 /* 719 * HPET on the current version of the Baytrail platform has accuracy 720 * problems: it will halt in deep idle state - so we disable it. 721 * 722 * More details can be found in section 18.10.1.3 of the datasheet: 723 * 724 * http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z8000-datasheet-vol-1.pdf 725 */ 726 { PCI_VENDOR_ID_INTEL, 0x0f00, 727 PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet}, 728 { PCI_VENDOR_ID_BROADCOM, 0x4331, 729 PCI_CLASS_NETWORK_OTHER, PCI_ANY_ID, 0, apple_airport_reset}, 730 {} 731 }; 732 733 static void __init early_pci_scan_bus(int bus); 734 735 /** 736 * check_dev_quirk - apply early quirks to a given PCI device 737 * @num: bus number 738 * @slot: slot number 739 * @func: PCI function 740 * 741 * Check the vendor & device ID against the early quirks table. 742 * 743 * If the device is single function, let early_pci_scan_bus() know so we don't 744 * poke at this device again. 745 */ 746 static int __init check_dev_quirk(int num, int slot, int func) 747 { 748 u16 class; 749 u16 vendor; 750 u16 device; 751 u8 type; 752 u8 sec; 753 int i; 754 755 class = read_pci_config_16(num, slot, func, PCI_CLASS_DEVICE); 756 757 if (class == 0xffff) 758 return -1; /* no class, treat as single function */ 759 760 vendor = read_pci_config_16(num, slot, func, PCI_VENDOR_ID); 761 762 device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID); 763 764 for (i = 0; early_qrk[i].f != NULL; i++) { 765 if (((early_qrk[i].vendor == PCI_ANY_ID) || 766 (early_qrk[i].vendor == vendor)) && 767 ((early_qrk[i].device == PCI_ANY_ID) || 768 (early_qrk[i].device == device)) && 769 (!((early_qrk[i].class ^ class) & 770 early_qrk[i].class_mask))) { 771 if ((early_qrk[i].flags & 772 QFLAG_DONE) != QFLAG_DONE) 773 early_qrk[i].f(num, slot, func); 774 early_qrk[i].flags |= QFLAG_APPLIED; 775 } 776 } 777 778 type = read_pci_config_byte(num, slot, func, 779 PCI_HEADER_TYPE); 780 781 if ((type & PCI_HEADER_TYPE_MASK) == PCI_HEADER_TYPE_BRIDGE) { 782 sec = read_pci_config_byte(num, slot, func, PCI_SECONDARY_BUS); 783 if (sec > num) 784 early_pci_scan_bus(sec); 785 } 786 787 if (!(type & PCI_HEADER_TYPE_MFD)) 788 return -1; 789 790 return 0; 791 } 792 793 static void __init early_pci_scan_bus(int bus) 794 { 795 int slot, func; 796 797 /* Poor man's PCI discovery */ 798 for (slot = 0; slot < 32; slot++) 799 for (func = 0; func < 8; func++) { 800 /* Only probe function 0 on single fn devices */ 801 if (check_dev_quirk(bus, slot, func)) 802 break; 803 } 804 } 805 806 void __init early_quirks(void) 807 { 808 if (!early_pci_allowed()) 809 return; 810 811 early_pci_scan_bus(0); 812 } 813