/* * 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/init.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\n"); 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\n", 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\n", 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\n"); 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\n"); 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\n"); 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\n", \ 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\n"); 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\n"); } } 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\n"); 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!\n"); else dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; " "enabled onboard soundcard\n"); } } 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\n"); request_mem_region(0xFFB00000, 0x100000, "twinhead"); } } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone);