/*
   * Exceptions for specific devices. Usually work-arounds for fatal design flaws.
   */
  
  #include <linux/delay.h>
  #include <linux/dmi.h>
  #include <linux/pci.h>
  #include <linux/vgaarb.h>
  #include <asm/pci_x86.h>
  
  static void pci_fixup_i450nx(struct pci_dev *d)
  {
  	/*
  	 * i450NX -- Find and scan all secondary buses on all PXB's.
  	 */
  	int pxb, reg;
  	u8 busno, suba, subb;
  
  	dev_warn(&d->dev, "Searching for i450NX host bridges
  ");
  	reg = 0xd0;
  	for(pxb = 0; pxb < 2; pxb++) {
  		pci_read_config_byte(d, reg++, &busno);
  		pci_read_config_byte(d, reg++, &suba);
  		pci_read_config_byte(d, reg++, &subb);
  		dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x
  ", pxb, busno,
  			suba, subb);
  		if (busno)
  			pci_scan_bus_with_sysdata(busno);	/* Bus A */
  		if (suba < subb)
  			pci_scan_bus_with_sysdata(suba+1);	/* Bus B */
  	}
  	pcibios_last_bus = -1;
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
  
  static void pci_fixup_i450gx(struct pci_dev *d)
  {
  	/*
  	 * i450GX and i450KX -- Find and scan all secondary buses.
  	 * (called separately for each PCI bridge found)
  	 */
  	u8 busno;
  	pci_read_config_byte(d, 0x4a, &busno);
  	dev_info(&d->dev, "i440KX/GX host bridge; secondary bus %02x
  ", busno);
  	pci_scan_bus_with_sysdata(busno);
  	pcibios_last_bus = -1;
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx);
  
  static void pci_fixup_umc_ide(struct pci_dev *d)
  {
  	/*
  	 * UM8886BF IDE controller sets region type bits incorrectly,
  	 * therefore they look like memory despite of them being I/O.
  	 */
  	int i;
  
  	dev_warn(&d->dev, "Fixing base address flags
  ");
  	for(i = 0; i < 4; i++)
  		d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide);
  
  static void pci_fixup_ncr53c810(struct pci_dev *d)
  {
  	/*
  	 * NCR 53C810 returns class code 0 (at least on some systems).
  	 * Fix class to be PCI_CLASS_STORAGE_SCSI
  	 */
  	if (!d->class) {
  		dev_warn(&d->dev, "Fixing NCR 53C810 class code
  ");
  		d->class = PCI_CLASS_STORAGE_SCSI << 8;
  	}
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, pci_fixup_ncr53c810);
  
  static void pci_fixup_latency(struct pci_dev *d)
  {
  	/*
  	 *  SiS 5597 and 5598 chipsets require latency timer set to
  	 *  at most 32 to avoid lockups.
  	 */
  	dev_dbg(&d->dev, "Setting max latency to 32
  ");
  	pcibios_max_latency = 32;
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency);
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency);
  
  static void pci_fixup_piix4_acpi(struct pci_dev *d)
  {
  	/*
  	 * PIIX4 ACPI device: hardwired IRQ9
  	 */
  	d->irq = 9;
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi);
  
  /*
   * Addresses issues with problems in the memory write queue timer in
   * certain VIA Northbridges.  This bugfix is per VIA's specifications,
   * except for the KL133/KM133: clearing bit 5 on those Northbridges seems
   * to trigger a bug in its integrated ProSavage video card, which
   * causes screen corruption.  We only clear bits 6 and 7 for that chipset,
   * until VIA can provide us with definitive information on why screen
   * corruption occurs, and what exactly those bits do.
   *
   * VIA 8363,8622,8361 Northbridges:
   *  - bits  5, 6, 7 at offset 0x55 need to be turned off
   * VIA 8367 (KT266x) Northbridges:
   *  - bits  5, 6, 7 at offset 0x95 need to be turned off
   * VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
   *  - bits     6, 7 at offset 0x55 need to be turned off
   */
  
  #define VIA_8363_KL133_REVISION_ID 0x81
  #define VIA_8363_KM133_REVISION_ID 0x84
  
  static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
  {
  	u8 v;
  	int where = 0x55;
  	int mask = 0x1f; /* clear bits 5, 6, 7 by default */
  
  	if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
  		/* fix pci bus latency issues resulted by NB bios error
  		   it appears on bug free^Wreduced kt266x's bios forces
  		   NB latency to zero */
  		pci_write_config_byte(d, PCI_LATENCY_TIMER, 0);
  
  		where = 0x95; /* the memory write queue timer register is
  				different for the KT266x's: 0x95 not 0x55 */
  	} else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
  			(d->revision == VIA_8363_KL133_REVISION_ID ||
  			d->revision == VIA_8363_KM133_REVISION_ID)) {
  			mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
  					causes screen corruption on the KL133/KM133 */
  	}
  
  	pci_read_config_byte(d, where, &v);
  	if (v & ~mask) {
  		dev_warn(&d->dev, "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x
  ", \
  			d->device, d->revision, where, v, mask, v & mask);
  		v &= mask;
  		pci_write_config_byte(d, where, v);
  	}
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
  DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
  DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
  DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
  DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
  
  /*
   * For some reasons Intel decided that certain parts of their
   * 815, 845 and some other chipsets must look like PCI-to-PCI bridges
   * while they are obviously not. The 82801 family (AA, AB, BAM/CAM,
   * BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according
   * to Intel terminology. These devices do forward all addresses from
   * system to PCI bus no matter what are their window settings, so they are
   * "transparent" (or subtractive decoding) from programmers point of view.
   */
  static void pci_fixup_transparent_bridge(struct pci_dev *dev)
  {
  	if ((dev->device & 0xff00) == 0x2400)
  		dev->transparent = 1;
  }
  DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
  			 PCI_CLASS_BRIDGE_PCI, 8, pci_fixup_transparent_bridge);
  
  /*
   * Fixup for C1 Halt Disconnect problem on nForce2 systems.
   *
   * From information provided by "Allen Martin" <AMartin@nvidia.com>:
   *
   * A hang is caused when the CPU generates a very fast CONNECT/HALT cycle
   * sequence.  Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns.
   * This allows the state-machine and timer to return to a proper state within
   * 80 ns of the CONNECT and probe appearing together.  Since the CPU will not
   * issue another HALT within 80 ns of the initial HALT, the failure condition
   * is avoided.
   */
  static void pci_fixup_nforce2(struct pci_dev *dev)
  {
  	u32 val;
  
  	/*
  	 * Chip  Old value   New value
  	 * C17   0x1F0FFF01  0x1F01FF01
  	 * C18D  0x9F0FFF01  0x9F01FF01
  	 *
  	 * Northbridge chip version may be determined by
  	 * reading the PCI revision ID (0xC1 or greater is C18D).
  	 */
  	pci_read_config_dword(dev, 0x6c, &val);
  
  	/*
  	 * Apply fixup if needed, but don't touch disconnect state
  	 */
  	if ((val & 0x00FF0000) != 0x00010000) {
  		dev_warn(&dev->dev, "nForce2 C1 Halt Disconnect fixup
  ");
  		pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000);
  	}
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
  DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
  
  /* Max PCI Express root ports */
  #define MAX_PCIEROOT	6
  static int quirk_aspm_offset[MAX_PCIEROOT << 3];
  
  #define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
  
  static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
  {
  	return raw_pci_read(pci_domain_nr(bus), bus->number,
  						devfn, where, size, value);
  }
  
  /*
   * Replace the original pci bus ops for write with a new one that will filter
   * the request to insure ASPM cannot be enabled.
   */
  static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
  {
  	u8 offset;
  
  	offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)];
  
  	if ((offset) && (where == offset))
  		value = value & ~PCI_EXP_LNKCTL_ASPMC;
  
  	return raw_pci_write(pci_domain_nr(bus), bus->number,
  						devfn, where, size, value);
  }
  
  static struct pci_ops quirk_pcie_aspm_ops = {
  	.read = quirk_pcie_aspm_read,
  	.write = quirk_pcie_aspm_write,
  };
  
  /*
   * Prevents PCI Express ASPM (Active State Power Management) being enabled.
   *
   * Save the register offset, where the ASPM control bits are located,
   * for each PCI Express device that is in the device list of
   * the root port in an array for fast indexing. Replace the bus ops
   * with the modified one.
   */
  static void pcie_rootport_aspm_quirk(struct pci_dev *pdev)
  {
  	int i;
  	struct pci_bus  *pbus;
  	struct pci_dev *dev;
  
  	if ((pbus = pdev->subordinate) == NULL)
  		return;
  
  	/*
  	 * Check if the DID of pdev matches one of the six root ports. This
  	 * check is needed in the case this function is called directly by the
  	 * hot-plug driver.
  	 */
  	if ((pdev->device < PCI_DEVICE_ID_INTEL_MCH_PA) ||
  	    (pdev->device > PCI_DEVICE_ID_INTEL_MCH_PC1))
  		return;
  
  	if (list_empty(&pbus->devices)) {
  		/*
  		 * If no device is attached to the root port at power-up or
  		 * after hot-remove, the pbus->devices is empty and this code
  		 * will set the offsets to zero and the bus ops to parent's bus
  		 * ops, which is unmodified.
  		 */
  		for (i = GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i)
  			quirk_aspm_offset[i] = 0;
  
  		pci_bus_set_ops(pbus, pbus->parent->ops);
  	} else {
  		/*
  		 * If devices are attached to the root port at power-up or
  		 * after hot-add, the code loops through the device list of
  		 * each root port to save the register offsets and replace the
  		 * bus ops.
  		 */
  		list_for_each_entry(dev, &pbus->devices, bus_list)
  			/* There are 0 to 8 devices attached to this bus */
  			quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)] =
  				dev->pcie_cap + PCI_EXP_LNKCTL;
  
  		pci_bus_set_ops(pbus, &quirk_pcie_aspm_ops);
  		dev_info(&pbus->dev, "writes to ASPM control bits will be ignored
  ");
  	}
  
  }
  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_MCH_PA,	pcie_rootport_aspm_quirk);
  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_MCH_PA1,	pcie_rootport_aspm_quirk);
  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_MCH_PB,	pcie_rootport_aspm_quirk);
  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_MCH_PB1,	pcie_rootport_aspm_quirk);
  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_MCH_PC,	pcie_rootport_aspm_quirk);
  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_MCH_PC1,	pcie_rootport_aspm_quirk);
  
  /*
   * Fixup to mark boot BIOS video selected by BIOS before it changes
   *
   * From information provided by "Jon Smirl" <jonsmirl@gmail.com>
   *
   * The standard boot ROM sequence for an x86 machine uses the BIOS
   * to select an initial video card for boot display. This boot video
   * card will have it's BIOS copied to C0000 in system RAM.
   * IORESOURCE_ROM_SHADOW is used to associate the boot video
   * card with this copy. On laptops this copy has to be used since
   * the main ROM may be compressed or combined with another image.
   * See pci_map_rom() for use of this flag. IORESOURCE_ROM_SHADOW
   * is marked here since the boot video device will be the only enabled
   * video device at this point.
   */
  
  static void pci_fixup_video(struct pci_dev *pdev)
  {
  	struct pci_dev *bridge;
  	struct pci_bus *bus;
  	u16 config;
  
  	/* Is VGA routed to us? */
  	bus = pdev->bus;
  	while (bus) {
  		bridge = bus->self;
  
  		/*
  		 * From information provided by
  		 * "David Miller" <davem@davemloft.net>
  		 * The bridge control register is valid for PCI header
  		 * type BRIDGE, or CARDBUS. Host to PCI controllers use
  		 * PCI header type NORMAL.
  		 */
  		if (bridge
  		    && ((bridge->hdr_type == PCI_HEADER_TYPE_BRIDGE)
  		       || (bridge->hdr_type == PCI_HEADER_TYPE_CARDBUS))) {
  			pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
  						&config);
  			if (!(config & PCI_BRIDGE_CTL_VGA))
  				return;
  		}
  		bus = bus->parent;
  	}
  	pci_read_config_word(pdev, PCI_COMMAND, &config);
  	if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
  		pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
  		dev_printk(KERN_DEBUG, &pdev->dev, "Boot video device
  ");
  		if (!vga_default_device())
  			vga_set_default_device(pdev);
  	}
  }
  DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
  				PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video);
  
  
  static const struct dmi_system_id msi_k8t_dmi_table[] = {
  	{
  		.ident = "MSI-K8T-Neo2Fir",
  		.matches = {
  			DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
  			DMI_MATCH(DMI_PRODUCT_NAME, "MS-6702E"),
  		},
  	},
  	{}
  };
  
  /*
   * The AMD-Athlon64 board MSI "K8T Neo2-FIR" disables the onboard sound
   * card if a PCI-soundcard is added.
   *
   * The BIOS only gives options "DISABLED" and "AUTO". This code sets
   * the corresponding register-value to enable the soundcard.
   *
   * The soundcard is only enabled, if the mainborad is identified
   * via DMI-tables and the soundcard is detected to be off.
   */
  static void pci_fixup_msi_k8t_onboard_sound(struct pci_dev *dev)
  {
  	unsigned char val;
  	if (!dmi_check_system(msi_k8t_dmi_table))
  		return; /* only applies to MSI K8T Neo2-FIR */
  
  	pci_read_config_byte(dev, 0x50, &val);
  	if (val & 0x40) {
  		pci_write_config_byte(dev, 0x50, val & (~0x40));
  
  		/* verify the change for status output */
  		pci_read_config_byte(dev, 0x50, &val);
  		if (val & 0x40)
  			dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
  					"can't enable onboard soundcard!
  ");
  		else
  			dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
  					"enabled onboard soundcard
  ");
  	}
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
  		pci_fixup_msi_k8t_onboard_sound);
  DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
  		pci_fixup_msi_k8t_onboard_sound);
  
  /*
   * Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
   *
   * We pretend to bring them out of full D3 state, and restore the proper
   * IRQ, PCI cache line size, and BARs, otherwise the device won't function
   * properly.  In some cases, the device will generate an interrupt on
   * the wrong IRQ line, causing any devices sharing the line it's
   * *supposed* to use to be disabled by the kernel's IRQ debug code.
   */
  static u16 toshiba_line_size;
  
  static const struct dmi_system_id toshiba_ohci1394_dmi_table[] = {
  	{
  		.ident = "Toshiba PS5 based laptop",
  		.matches = {
  			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
  			DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"),
  		},
  	},
  	{
  		.ident = "Toshiba PSM4 based laptop",
  		.matches = {
  			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
  			DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"),
  		},
  	},
  	{
  		.ident = "Toshiba A40 based laptop",
  		.matches = {
  			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
  			DMI_MATCH(DMI_PRODUCT_VERSION, "PSA40U"),
  		},
  	},
  	{ }
  };
  
  static void pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev)
  {
  	if (!dmi_check_system(toshiba_ohci1394_dmi_table))
  		return; /* only applies to certain Toshibas (so far) */
  
  	dev->current_state = PCI_D3cold;
  	pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size);
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032,
  			 pci_pre_fixup_toshiba_ohci1394);
  
  static void pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
  {
  	if (!dmi_check_system(toshiba_ohci1394_dmi_table))
  		return; /* only applies to certain Toshibas (so far) */
  
  	/* Restore config space on Toshiba laptops */
  	pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size);
  	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq);
  	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
  			       pci_resource_start(dev, 0));
  	pci_write_config_dword(dev, PCI_BASE_ADDRESS_1,
  			       pci_resource_start(dev, 1));
  }
  DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
  			 pci_post_fixup_toshiba_ohci1394);
  
  
  /*
   * Prevent the BIOS trapping accesses to the Cyrix CS5530A video device
   * configuration space.
   */
  static void pci_early_fixup_cyrix_5530(struct pci_dev *dev)
  {
  	u8 r;
  	/* clear 'F4 Video Configuration Trap' bit */
  	pci_read_config_byte(dev, 0x42, &r);
  	r &= 0xfd;
  	pci_write_config_byte(dev, 0x42, r);
  }
  DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
  			pci_early_fixup_cyrix_5530);
  DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
  			pci_early_fixup_cyrix_5530);
  
  /*
   * Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller:
   * prevent update of the BAR0, which doesn't look like a normal BAR.
   */
  static void pci_siemens_interrupt_controller(struct pci_dev *dev)
  {
  	dev->resource[0].flags |= IORESOURCE_PCI_FIXED;
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
  			  pci_siemens_interrupt_controller);
  
  /*
   * SB600: Disable BAR1 on device 14.0 to avoid HPET resources from
   * confusing the PCI engine:
   */
  static void sb600_disable_hpet_bar(struct pci_dev *dev)
  {
  	u8 val;
  
  	/*
  	 * The SB600 and SB700 both share the same device
  	 * ID, but the PM register 0x55 does something different
  	 * for the SB700, so make sure we are dealing with the
  	 * SB600 before touching the bit:
  	 */
  
  	pci_read_config_byte(dev, 0x08, &val);
  
  	if (val < 0x2F) {
  		outb(0x55, 0xCD6);
  		val = inb(0xCD7);
  
  		/* Set bit 7 in PM register 0x55 */
  		outb(0x55, 0xCD6);
  		outb(val | 0x80, 0xCD7);
  	}
  }
  DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar);
  
  /*
   * Twinhead H12Y needs us to block out a region otherwise we map devices
   * there and any access kills the box.
   *
   *   See: https://bugzilla.kernel.org/show_bug.cgi?id=10231
   *
   * Match off the LPC and svid/sdid (older kernels lose the bridge subvendor)
   */
  static void twinhead_reserve_killing_zone(struct pci_dev *dev)
  {
          if (dev->subsystem_vendor == 0x14FF && dev->subsystem_device == 0xA003) {
                  pr_info("Reserving memory on Twinhead H12Y
  ");
                  request_mem_region(0xFFB00000, 0x100000, "twinhead");
          }
  }
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone);