arch/x86/pci/fixup.c

   1 /*
   2  * Exceptions for specific devices. Usually work-arounds for fatal design flaws.
   3  */
   4
   5 #include <linux/delay.h>
   6 #include <linux/dmi.h>
   7 #include <linux/pci.h>
   8 #include <linux/vgaarb.h>
   9 #include <asm/hpet.h>
  10 #include <asm/pci_x86.h>
  11
  12 static void pci_fixup_i450nx(struct pci_dev *d)
  13 {
  14         /*
  15          * i450NX -- Find and scan all secondary buses on all PXB's.
  16          */
  17         int pxb, reg;
  18         u8 busno, suba, subb;
  19
  20         dev_warn(&d->dev, "Searching for i450NX host bridges\n");
  21         reg = 0xd0;
  22         for(pxb = 0; pxb < 2; pxb++) {
  23                 pci_read_config_byte(d, reg++, &busno);
  24                 pci_read_config_byte(d, reg++, &suba);
  25                 pci_read_config_byte(d, reg++, &subb);
  26                 dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno,
  27                         suba, subb);
  28                 if (busno)
  29                         pcibios_scan_root(busno);       /* Bus A */
  30                 if (suba < subb)
  31                         pcibios_scan_root(suba+1);      /* Bus B */
  32         }
  33         pcibios_last_bus = -1;
  34 }
  35 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
  36
  37 static void pci_fixup_i450gx(struct pci_dev *d)
  38 {
  39         /*
  40          * i450GX and i450KX -- Find and scan all secondary buses.
  41          * (called separately for each PCI bridge found)
  42          */
  43         u8 busno;
  44         pci_read_config_byte(d, 0x4a, &busno);
  45         dev_info(&d->dev, "i440KX/GX host bridge; secondary bus %02x\n", busno);
  46         pcibios_scan_root(busno);
  47         pcibios_last_bus = -1;
  48 }
  49 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx);
  50
  51 static void pci_fixup_umc_ide(struct pci_dev *d)
  52 {
  53         /*
  54          * UM8886BF IDE controller sets region type bits incorrectly,
  55          * therefore they look like memory despite of them being I/O.
  56          */
  57         int i;
  58
  59         dev_warn(&d->dev, "Fixing base address flags\n");
  60         for(i = 0; i < 4; i++)
  61                 d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
  62 }
  63 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide);
  64
  65 static void pci_fixup_latency(struct pci_dev *d)
  66 {
  67         /*
  68          *  SiS 5597 and 5598 chipsets require latency timer set to
  69          *  at most 32 to avoid lockups.
  70          */
  71         dev_dbg(&d->dev, "Setting max latency to 32\n");
  72         pcibios_max_latency = 32;
  73 }
  74 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency);
  75 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency);
  76
  77 static void pci_fixup_piix4_acpi(struct pci_dev *d)
  78 {
  79         /*
  80          * PIIX4 ACPI device: hardwired IRQ9
  81          */
  82         d->irq = 9;
  83 }
  84 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi);
  85
  86 /*
  87  * Addresses issues with problems in the memory write queue timer in
  88  * certain VIA Northbridges.  This bugfix is per VIA's specifications,
  89  * except for the KL133/KM133: clearing bit 5 on those Northbridges seems
  90  * to trigger a bug in its integrated ProSavage video card, which
  91  * causes screen corruption.  We only clear bits 6 and 7 for that chipset,
  92  * until VIA can provide us with definitive information on why screen
  93  * corruption occurs, and what exactly those bits do.
  94  *
  95  * VIA 8363,8622,8361 Northbridges:
  96  *  - bits  5, 6, 7 at offset 0x55 need to be turned off
  97  * VIA 8367 (KT266x) Northbridges:
  98  *  - bits  5, 6, 7 at offset 0x95 need to be turned off
  99  * VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
 100  *  - bits     6, 7 at offset 0x55 need to be turned off
 101  */
 102
 103 #define VIA_8363_KL133_REVISION_ID 0x81
 104 #define VIA_8363_KM133_REVISION_ID 0x84
 105
 106 static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
 107 {
 108         u8 v;
 109         int where = 0x55;
 110         int mask = 0x1f; /* clear bits 5, 6, 7 by default */
 111
 112         if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
 113                 /* fix pci bus latency issues resulted by NB bios error
 114                    it appears on bug free^Wreduced kt266x's bios forces
 115                    NB latency to zero */
 116                 pci_write_config_byte(d, PCI_LATENCY_TIMER, 0);
 117
 118                 where = 0x95; /* the memory write queue timer register is
 119                                 different for the KT266x's: 0x95 not 0x55 */
 120         } else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
 121                         (d->revision == VIA_8363_KL133_REVISION_ID ||
 122                         d->revision == VIA_8363_KM133_REVISION_ID)) {
 123                         mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
 124                                         causes screen corruption on the KL133/KM133 */
 125         }
 126
 127         pci_read_config_byte(d, where, &v);
 128         if (v & ~mask) {
 129                 dev_warn(&d->dev, "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
 130                         d->device, d->revision, where, v, mask, v & mask);
 131                 v &= mask;
 132                 pci_write_config_byte(d, where, v);
 133         }
 134 }
 135 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
 136 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
 137 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
 138 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
 139 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
 140 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
 141 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
 142 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
 143
 144 /*
 145  * For some reasons Intel decided that certain parts of their
 146  * 815, 845 and some other chipsets must look like PCI-to-PCI bridges
 147  * while they are obviously not. The 82801 family (AA, AB, BAM/CAM,
 148  * BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according
 149  * to Intel terminology. These devices do forward all addresses from
 150  * system to PCI bus no matter what are their window settings, so they are
 151  * "transparent" (or subtractive decoding) from programmers point of view.
 152  */
 153 static void pci_fixup_transparent_bridge(struct pci_dev *dev)
 154 {
 155         if ((dev->device & 0xff00) == 0x2400)
 156                 dev->transparent = 1;
 157 }
 158 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
 159                          PCI_CLASS_BRIDGE_PCI, 8, pci_fixup_transparent_bridge);
 160
 161 /*
 162  * Fixup for C1 Halt Disconnect problem on nForce2 systems.
 163  *
 164  * From information provided by "Allen Martin" <AMartin@nvidia.com>:
 165  *
 166  * A hang is caused when the CPU generates a very fast CONNECT/HALT cycle
 167  * sequence.  Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns.
 168  * This allows the state-machine and timer to return to a proper state within
 169  * 80 ns of the CONNECT and probe appearing together.  Since the CPU will not
 170  * issue another HALT within 80 ns of the initial HALT, the failure condition
 171  * is avoided.
 172  */
 173 static void pci_fixup_nforce2(struct pci_dev *dev)
 174 {
 175         u32 val;
 176
 177         /*
 178          * Chip  Old value   New value
 179          * C17   0x1F0FFF01  0x1F01FF01
 180          * C18D  0x9F0FFF01  0x9F01FF01
 181          *
 182          * Northbridge chip version may be determined by
 183          * reading the PCI revision ID (0xC1 or greater is C18D).
 184          */
 185         pci_read_config_dword(dev, 0x6c, &val);
 186
 187         /*
 188          * Apply fixup if needed, but don't touch disconnect state
 189          */
 190         if ((val & 0x00FF0000) != 0x00010000) {
 191                 dev_warn(&dev->dev, "nForce2 C1 Halt Disconnect fixup\n");
 192                 pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000);
 193         }
 194 }
 195 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
 196 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
 197
 198 /* Max PCI Express root ports */
 199 #define MAX_PCIEROOT    6
 200 static int quirk_aspm_offset[MAX_PCIEROOT << 3];
 201
 202 #define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
 203
 204 static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
 205 {
 206         return raw_pci_read(pci_domain_nr(bus), bus->number,
 207                                                 devfn, where, size, value);
 208 }
 209
 210 /*
 211  * Replace the original pci bus ops for write with a new one that will filter
 212  * the request to insure ASPM cannot be enabled.
 213  */
 214 static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
 215 {
 216         u8 offset;
 217
 218         offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)];
 219
 220         if ((offset) && (where == offset))
 221                 value = value & ~PCI_EXP_LNKCTL_ASPMC;
 222
 223         return raw_pci_write(pci_domain_nr(bus), bus->number,
 224                                                 devfn, where, size, value);
 225 }
 226
 227 static struct pci_ops quirk_pcie_aspm_ops = {
 228         .read = quirk_pcie_aspm_read,
 229         .write = quirk_pcie_aspm_write,
 230 };
 231
 232 /*
 233  * Prevents PCI Express ASPM (Active State Power Management) being enabled.
 234  *
 235  * Save the register offset, where the ASPM control bits are located,
 236  * for each PCI Express device that is in the device list of
 237  * the root port in an array for fast indexing. Replace the bus ops
 238  * with the modified one.
 239  */
 240 static void pcie_rootport_aspm_quirk(struct pci_dev *pdev)
 241 {
 242         int i;
 243         struct pci_bus  *pbus;
 244         struct pci_dev *dev;
 245
 246         if ((pbus = pdev->subordinate) == NULL)
 247                 return;
 248
 249         /*
 250          * Check if the DID of pdev matches one of the six root ports. This
 251          * check is needed in the case this function is called directly by the
 252          * hot-plug driver.
 253          */
 254         if ((pdev->device < PCI_DEVICE_ID_INTEL_MCH_PA) ||
 255             (pdev->device > PCI_DEVICE_ID_INTEL_MCH_PC1))
 256                 return;
 257
 258         if (list_empty(&pbus->devices)) {
 259                 /*
 260                  * If no device is attached to the root port at power-up or
 261                  * after hot-remove, the pbus->devices is empty and this code
 262                  * will set the offsets to zero and the bus ops to parent's bus
 263                  * ops, which is unmodified.
 264                  */
 265                 for (i = GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i)
 266                         quirk_aspm_offset[i] = 0;
 267
 268                 pci_bus_set_ops(pbus, pbus->parent->ops);
 269         } else {
 270                 /*
 271                  * If devices are attached to the root port at power-up or
 272                  * after hot-add, the code loops through the device list of
 273                  * each root port to save the register offsets and replace the
 274                  * bus ops.
 275                  */
 276                 list_for_each_entry(dev, &pbus->devices, bus_list)
 277                         /* There are 0 to 8 devices attached to this bus */
 278                         quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)] =
 279                                 dev->pcie_cap + PCI_EXP_LNKCTL;
 280
 281                 pci_bus_set_ops(pbus, &quirk_pcie_aspm_ops);
 282                 dev_info(&pbus->dev, "writes to ASPM control bits will be ignored\n");
 283         }
 284
 285 }
 286 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_MCH_PA,     pcie_rootport_aspm_quirk);
 287 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_MCH_PA1,    pcie_rootport_aspm_quirk);
 288 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_MCH_PB,     pcie_rootport_aspm_quirk);
 289 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_MCH_PB1,    pcie_rootport_aspm_quirk);
 290 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_MCH_PC,     pcie_rootport_aspm_quirk);
 291 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_MCH_PC1,    pcie_rootport_aspm_quirk);
 292
 293 /*
 294  * Fixup to mark boot BIOS video selected by BIOS before it changes
 295  *
 296  * From information provided by "Jon Smirl" <jonsmirl@gmail.com>
 297  *
 298  * The standard boot ROM sequence for an x86 machine uses the BIOS
 299  * to select an initial video card for boot display. This boot video
 300  * card will have it's BIOS copied to C0000 in system RAM.
 301  * IORESOURCE_ROM_SHADOW is used to associate the boot video
 302  * card with this copy. On laptops this copy has to be used since
 303  * the main ROM may be compressed or combined with another image.
 304  * See pci_map_rom() for use of this flag. Before marking the device
 305  * with IORESOURCE_ROM_SHADOW check if a vga_default_device is already set
 306  * by either arch cde or vga-arbitration, if so only apply the fixup to this
 307  * already determined primary video card.
 308  */
 309
 310 static void pci_fixup_video(struct pci_dev *pdev)
 311 {
 312         struct pci_dev *bridge;
 313         struct pci_bus *bus;
 314         u16 config;
 315
 316         /* Is VGA routed to us? */
 317         bus = pdev->bus;
 318         while (bus) {
 319                 bridge = bus->self;
 320
 321                 /*
 322                  * From information provided by
 323                  * "David Miller" <davem@davemloft.net>
 324                  * The bridge control register is valid for PCI header
 325                  * type BRIDGE, or CARDBUS. Host to PCI controllers use
 326                  * PCI header type NORMAL.
 327                  */
 328                 if (bridge && (pci_is_bridge(bridge))) {
 329                         pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
 330                                                 &config);
 331                         if (!(config & PCI_BRIDGE_CTL_VGA))
 332                                 return;
 333                 }
 334                 bus = bus->parent;
 335         }
 336         if (!vga_default_device() || pdev == vga_default_device()) {
 337                 pci_read_config_word(pdev, PCI_COMMAND, &config);
 338                 if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
 339                         pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
 340                         dev_printk(KERN_DEBUG, &pdev->dev, "Video device with shadowed ROM\n");
 341                 }
 342         }
 343 }
 344 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
 345                                 PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video);
 346
 347
 348 static const struct dmi_system_id msi_k8t_dmi_table[] = {
 349         {
 350                 .ident = "MSI-K8T-Neo2Fir",
 351                 .matches = {
 352                         DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
 353                         DMI_MATCH(DMI_PRODUCT_NAME, "MS-6702E"),
 354                 },
 355         },
 356         {}
 357 };
 358
 359 /*
 360  * The AMD-Athlon64 board MSI "K8T Neo2-FIR" disables the onboard sound
 361  * card if a PCI-soundcard is added.
 362  *
 363  * The BIOS only gives options "DISABLED" and "AUTO". This code sets
 364  * the corresponding register-value to enable the soundcard.
 365  *
 366  * The soundcard is only enabled, if the mainborad is identified
 367  * via DMI-tables and the soundcard is detected to be off.
 368  */
 369 static void pci_fixup_msi_k8t_onboard_sound(struct pci_dev *dev)
 370 {
 371         unsigned char val;
 372         if (!dmi_check_system(msi_k8t_dmi_table))
 373                 return; /* only applies to MSI K8T Neo2-FIR */
 374
 375         pci_read_config_byte(dev, 0x50, &val);
 376         if (val & 0x40) {
 377                 pci_write_config_byte(dev, 0x50, val & (~0x40));
 378
 379                 /* verify the change for status output */
 380                 pci_read_config_byte(dev, 0x50, &val);
 381                 if (val & 0x40)
 382                         dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
 383                                         "can't enable onboard soundcard!\n");
 384                 else
 385                         dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
 386                                         "enabled onboard soundcard\n");
 387         }
 388 }
 389 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
 390                 pci_fixup_msi_k8t_onboard_sound);
 391 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
 392                 pci_fixup_msi_k8t_onboard_sound);
 393
 394 /*
 395  * Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
 396  *
 397  * We pretend to bring them out of full D3 state, and restore the proper
 398  * IRQ, PCI cache line size, and BARs, otherwise the device won't function
 399  * properly.  In some cases, the device will generate an interrupt on
 400  * the wrong IRQ line, causing any devices sharing the line it's
 401  * *supposed* to use to be disabled by the kernel's IRQ debug code.
 402  */
 403 static u16 toshiba_line_size;
 404
 405 static const struct dmi_system_id toshiba_ohci1394_dmi_table[] = {
 406         {
 407                 .ident = "Toshiba PS5 based laptop",
 408                 .matches = {
 409                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 410                         DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"),
 411                 },
 412         },
 413         {
 414                 .ident = "Toshiba PSM4 based laptop",
 415                 .matches = {
 416                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 417                         DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"),
 418                 },
 419         },
 420         {
 421                 .ident = "Toshiba A40 based laptop",
 422                 .matches = {
 423                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 424                         DMI_MATCH(DMI_PRODUCT_VERSION, "PSA40U"),
 425                 },
 426         },
 427         { }
 428 };
 429
 430 static void pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev)
 431 {
 432         if (!dmi_check_system(toshiba_ohci1394_dmi_table))
 433                 return; /* only applies to certain Toshibas (so far) */
 434
 435         dev->current_state = PCI_D3cold;
 436         pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size);
 437 }
 438 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032,
 439                          pci_pre_fixup_toshiba_ohci1394);
 440
 441 static void pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
 442 {
 443         if (!dmi_check_system(toshiba_ohci1394_dmi_table))
 444                 return; /* only applies to certain Toshibas (so far) */
 445
 446         /* Restore config space on Toshiba laptops */
 447         pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size);
 448         pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq);
 449         pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
 450                                pci_resource_start(dev, 0));
 451         pci_write_config_dword(dev, PCI_BASE_ADDRESS_1,
 452                                pci_resource_start(dev, 1));
 453 }
 454 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
 455                          pci_post_fixup_toshiba_ohci1394);
 456
 457
 458 /*
 459  * Prevent the BIOS trapping accesses to the Cyrix CS5530A video device
 460  * configuration space.
 461  */
 462 static void pci_early_fixup_cyrix_5530(struct pci_dev *dev)
 463 {
 464         u8 r;
 465         /* clear 'F4 Video Configuration Trap' bit */
 466         pci_read_config_byte(dev, 0x42, &r);
 467         r &= 0xfd;
 468         pci_write_config_byte(dev, 0x42, r);
 469 }
 470 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
 471                         pci_early_fixup_cyrix_5530);
 472 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
 473                         pci_early_fixup_cyrix_5530);
 474
 475 /*
 476  * Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller:
 477  * prevent update of the BAR0, which doesn't look like a normal BAR.
 478  */
 479 static void pci_siemens_interrupt_controller(struct pci_dev *dev)
 480 {
 481         dev->resource[0].flags |= IORESOURCE_PCI_FIXED;
 482 }
 483 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
 484                           pci_siemens_interrupt_controller);
 485
 486 /*
 487  * SB600: Disable BAR1 on device 14.0 to avoid HPET resources from
 488  * confusing the PCI engine:
 489  */
 490 static void sb600_disable_hpet_bar(struct pci_dev *dev)
 491 {
 492         u8 val;
 493
 494         /*
 495          * The SB600 and SB700 both share the same device
 496          * ID, but the PM register 0x55 does something different
 497          * for the SB700, so make sure we are dealing with the
 498          * SB600 before touching the bit:
 499          */
 500
 501         pci_read_config_byte(dev, 0x08, &val);
 502
 503         if (val < 0x2F) {
 504                 outb(0x55, 0xCD6);
 505                 val = inb(0xCD7);
 506
 507                 /* Set bit 7 in PM register 0x55 */
 508                 outb(0x55, 0xCD6);
 509                 outb(val | 0x80, 0xCD7);
 510         }
 511 }
 512 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar);
 513
 514 #ifdef CONFIG_HPET_TIMER
 515 static void sb600_hpet_quirk(struct pci_dev *dev)
 516 {
 517         struct resource *r = &dev->resource[1];
 518
 519         if (r->flags & IORESOURCE_MEM && r->start == hpet_address) {
 520                 r->flags |= IORESOURCE_PCI_FIXED;
 521                 dev_info(&dev->dev, "reg 0x14 contains HPET; making it immovable\n");
 522         }
 523 }
 524 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, 0x4385, sb600_hpet_quirk);
 525 #endif
 526
 527 /*
 528  * Twinhead H12Y needs us to block out a region otherwise we map devices
 529  * there and any access kills the box.
 530  *
 531  *   See: https://bugzilla.kernel.org/show_bug.cgi?id=10231
 532  *
 533  * Match off the LPC and svid/sdid (older kernels lose the bridge subvendor)
 534  */
 535 static void twinhead_reserve_killing_zone(struct pci_dev *dev)
 536 {
 537         if (dev->subsystem_vendor == 0x14FF && dev->subsystem_device == 0xA003) {
 538                 pr_info("Reserving memory on Twinhead H12Y\n");
 539                 request_mem_region(0xFFB00000, 0x100000, "twinhead");
 540         }
 541 }
 542 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone);