/* * Low-Level PCI Support for PC -- Routing of Interrupts * * (c) 1999--2000 Martin Mares */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24)) #define PIRQ_VERSION 0x0100 static int broken_hp_bios_irq9; static int acer_tm360_irqrouting; static struct irq_routing_table *pirq_table; static int pirq_enable_irq(struct pci_dev *dev); /* * Never use: 0, 1, 2 (timer, keyboard, and cascade) * Avoid using: 13, 14 and 15 (FP error and IDE). * Penalize: 3, 4, 6, 7, 12 (known ISA uses: serial, floppy, parallel and mouse) */ unsigned int pcibios_irq_mask = 0xfff8; static int pirq_penalty[16] = { 1000000, 1000000, 1000000, 1000, 1000, 0, 1000, 1000, 0, 0, 0, 0, 1000, 100000, 100000, 100000 }; struct irq_router { char *name; u16 vendor, device; int (*get)(struct pci_dev *router, struct pci_dev *dev, int pirq); int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq, int new); }; struct irq_router_handler { u16 vendor; int (*probe)(struct irq_router *r, struct pci_dev *router, u16 device); }; int (*pcibios_enable_irq)(struct pci_dev *dev) = NULL; void (*pcibios_disable_irq)(struct pci_dev *dev) = NULL; /* * Check passed address for the PCI IRQ Routing Table signature * and perform checksum verification. */ static inline struct irq_routing_table *pirq_check_routing_table(u8 *addr) { struct irq_routing_table *rt; int i; u8 sum; rt = (struct irq_routing_table *) addr; if (rt->signature != PIRQ_SIGNATURE || rt->version != PIRQ_VERSION || rt->size % 16 || rt->size < sizeof(struct irq_routing_table)) return NULL; sum = 0; for (i = 0; i < rt->size; i++) sum += addr[i]; if (!sum) { DBG(KERN_DEBUG "PCI: Interrupt Routing Table found at 0x%p\n", rt); return rt; } return NULL; } /* * Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table. */ static struct irq_routing_table * __init pirq_find_routing_table(void) { u8 *addr; struct irq_routing_table *rt; if (pirq_table_addr) { rt = pirq_check_routing_table((u8 *) __va(pirq_table_addr)); if (rt) return rt; printk(KERN_WARNING "PCI: PIRQ table NOT found at pirqaddr\n"); } for (addr = (u8 *) __va(0xf0000); addr < (u8 *) __va(0x100000); addr += 16) { rt = pirq_check_routing_table(addr); if (rt) return rt; } return NULL; } /* * If we have a IRQ routing table, use it to search for peer host * bridges. It's a gross hack, but since there are no other known * ways how to get a list of buses, we have to go this way. */ static void __init pirq_peer_trick(void) { struct irq_routing_table *rt = pirq_table; u8 busmap[256]; int i; struct irq_info *e; memset(busmap, 0, sizeof(busmap)); for (i = 0; i < (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); i++) { e = &rt->slots[i]; #ifdef DEBUG { int j; DBG(KERN_DEBUG "%02x:%02x slot=%02x", e->bus, e->devfn/8, e->slot); for (j = 0; j < 4; j++) DBG(" %d:%02x/%04x", j, e->irq[j].link, e->irq[j].bitmap); DBG("\n"); } #endif busmap[e->bus] = 1; } for (i = 1; i < 256; i++) { int node; if (!busmap[i] || pci_find_bus(0, i)) continue; node = get_mp_bus_to_node(i); if (pci_scan_bus_on_node(i, &pci_root_ops, node)) printk(KERN_INFO "PCI: Discovered primary peer " "bus %02x [IRQ]\n", i); } pcibios_last_bus = -1; } /* * Code for querying and setting of IRQ routes on various interrupt routers. */ void eisa_set_level_irq(unsigned int irq) { unsigned char mask = 1 << (irq & 7); unsigned int port = 0x4d0 + (irq >> 3); unsigned char val; static u16 eisa_irq_mask; if (irq >= 16 || (1 << irq) & eisa_irq_mask) return; eisa_irq_mask |= (1 << irq); printk(KERN_DEBUG "PCI: setting IRQ %u as level-triggered\n", irq); val = inb(port); if (!(val & mask)) { DBG(KERN_DEBUG " -> edge"); outb(val | mask, port); } } /* * Common IRQ routing practice: nibbles in config space, * offset by some magic constant. */ static unsigned int read_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr) { u8 x; unsigned reg = offset + (nr >> 1); pci_read_config_byte(router, reg, &x); return (nr & 1) ? (x >> 4) : (x & 0xf); } static void write_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr, unsigned int val) { u8 x; unsigned reg = offset + (nr >> 1); pci_read_config_byte(router, reg, &x); x = (nr & 1) ? ((x & 0x0f) | (val << 4)) : ((x & 0xf0) | val); pci_write_config_byte(router, reg, x); } /* * ALI pirq entries are damn ugly, and completely undocumented. * This has been figured out from pirq tables, and it's not a pretty * picture. */ static int pirq_ali_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { static const unsigned char irqmap[16] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 }; WARN_ON_ONCE(pirq > 16); return irqmap[read_config_nybble(router, 0x48, pirq-1)]; } static int pirq_ali_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { static const unsigned char irqmap[16] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 }; unsigned int val = irqmap[irq]; WARN_ON_ONCE(pirq > 16); if (val) { write_config_nybble(router, 0x48, pirq-1, val); return 1; } return 0; } /* * The Intel PIIX4 pirq rules are fairly simple: "pirq" is * just a pointer to the config space. */ static int pirq_piix_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { u8 x; pci_read_config_byte(router, pirq, &x); return (x < 16) ? x : 0; } static int pirq_piix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { pci_write_config_byte(router, pirq, irq); return 1; } /* * The VIA pirq rules are nibble-based, like ALI, * but without the ugly irq number munging. * However, PIRQD is in the upper instead of lower 4 bits. */ static int pirq_via_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { return read_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq); } static int pirq_via_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { write_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq, irq); return 1; } /* * The VIA pirq rules are nibble-based, like ALI, * but without the ugly irq number munging. * However, for 82C586, nibble map is different . */ static int pirq_via586_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 }; WARN_ON_ONCE(pirq > 5); return read_config_nybble(router, 0x55, pirqmap[pirq-1]); } static int pirq_via586_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 }; WARN_ON_ONCE(pirq > 5); write_config_nybble(router, 0x55, pirqmap[pirq-1], irq); return 1; } /* * ITE 8330G pirq rules are nibble-based * FIXME: pirqmap may be { 1, 0, 3, 2 }, * 2+3 are both mapped to irq 9 on my system */ static int pirq_ite_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { static const unsigned char pirqmap[4] = { 1, 0, 2, 3 }; WARN_ON_ONCE(pirq > 4); return read_config_nybble(router, 0x43, pirqmap[pirq-1]); } static int pirq_ite_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { static const unsigned char pirqmap[4] = { 1, 0, 2, 3 }; WARN_ON_ONCE(pirq > 4); write_config_nybble(router, 0x43, pirqmap[pirq-1], irq); return 1; } /* * OPTI: high four bits are nibble pointer.. * I wonder what the low bits do? */ static int pirq_opti_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { return read_config_nybble(router, 0xb8, pirq >> 4); } static int pirq_opti_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { write_config_nybble(router, 0xb8, pirq >> 4, irq); return 1; } /* * Cyrix: nibble offset 0x5C * 0x5C bits 7:4 is INTB bits 3:0 is INTA * 0x5D bits 7:4 is INTD bits 3:0 is INTC */ static int pirq_cyrix_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { return read_config_nybble(router, 0x5C, (pirq-1)^1); } static int pirq_cyrix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { write_config_nybble(router, 0x5C, (pirq-1)^1, irq); return 1; } /* * PIRQ routing for SiS 85C503 router used in several SiS chipsets. * We have to deal with the following issues here: * - vendors have different ideas about the meaning of link values * - some onboard devices (integrated in the chipset) have special * links and are thus routed differently (i.e. not via PCI INTA-INTD) * - different revision of the router have a different layout for * the routing registers, particularly for the onchip devices * * For all routing registers the common thing is we have one byte * per routeable link which is defined as: * bit 7 IRQ mapping enabled (0) or disabled (1) * bits [6:4] reserved (sometimes used for onchip devices) * bits [3:0] IRQ to map to * allowed: 3-7, 9-12, 14-15 * reserved: 0, 1, 2, 8, 13 * * The config-space registers located at 0x41/0x42/0x43/0x44 are * always used to route the normal PCI INT A/B/C/D respectively. * Apparently there are systems implementing PCI routing table using * link values 0x01-0x04 and others using 0x41-0x44 for PCI INTA..D. * We try our best to handle both link mappings. * * Currently (2003-05-21) it appears most SiS chipsets follow the * definition of routing registers from the SiS-5595 southbridge. * According to the SiS 5595 datasheets the revision id's of the * router (ISA-bridge) should be 0x01 or 0xb0. * * Furthermore we've also seen lspci dumps with revision 0x00 and 0xb1. * Looks like these are used in a number of SiS 5xx/6xx/7xx chipsets. * They seem to work with the current routing code. However there is * some concern because of the two USB-OHCI HCs (original SiS 5595 * had only one). YMMV. * * Onchip routing for router rev-id 0x01/0xb0 and probably 0x00/0xb1: * * 0x61: IDEIRQ: * bits [6:5] must be written 01 * bit 4 channel-select primary (0), secondary (1) * * 0x62: USBIRQ: * bit 6 OHCI function disabled (0), enabled (1) * * 0x6a: ACPI/SCI IRQ: bits 4-6 reserved * * 0x7e: Data Acq. Module IRQ - bits 4-6 reserved * * We support USBIRQ (in addition to INTA-INTD) and keep the * IDE, ACPI and DAQ routing untouched as set by the BIOS. * * Currently the only reported exception is the new SiS 65x chipset * which includes the SiS 69x southbridge. Here we have the 85C503 * router revision 0x04 and there are changes in the register layout * mostly related to the different USB HCs with USB 2.0 support. * * Onchip routing for router rev-id 0x04 (try-and-error observation) * * 0x60/0x61/0x62/0x63: 1xEHCI and 3xOHCI (companion) USB-HCs * bit 6-4 are probably unused, not like 5595 */ #define PIRQ_SIS_IRQ_MASK 0x0f #define PIRQ_SIS_IRQ_DISABLE 0x80 #define PIRQ_SIS_USB_ENABLE 0x40 static int pirq_sis_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { u8 x; int reg; reg = pirq; if (reg >= 0x01 && reg <= 0x04) reg += 0x40; pci_read_config_byte(router, reg, &x); return (x & PIRQ_SIS_IRQ_DISABLE) ? 0 : (x & PIRQ_SIS_IRQ_MASK); } static int pirq_sis_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { u8 x; int reg; reg = pirq; if (reg >= 0x01 && reg <= 0x04) reg += 0x40; pci_read_config_byte(router, reg, &x); x &= ~(PIRQ_SIS_IRQ_MASK | PIRQ_SIS_IRQ_DISABLE); x |= irq ? irq: PIRQ_SIS_IRQ_DISABLE; pci_write_config_byte(router, reg, x); return 1; } /* * VLSI: nibble offset 0x74 - educated guess due to routing table and * config space of VLSI 82C534 PCI-bridge/router (1004:0102) * Tested on HP OmniBook 800 covering PIRQ 1, 2, 4, 8 for onboard * devices, PIRQ 3 for non-pci(!) soundchip and (untested) PIRQ 6 * for the busbridge to the docking station. */ static int pirq_vlsi_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { WARN_ON_ONCE(pirq >= 9); if (pirq > 8) { dev_info(&dev->dev, "VLSI router PIRQ escape (%d)\n", pirq); return 0; } return read_config_nybble(router, 0x74, pirq-1); } static int pirq_vlsi_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { WARN_ON_ONCE(pirq >= 9); if (pirq > 8) { dev_info(&dev->dev, "VLSI router PIRQ escape (%d)\n", pirq); return 0; } write_config_nybble(router, 0x74, pirq-1, irq); return 1; } /* * ServerWorks: PCI interrupts mapped to system IRQ lines through Index * and Redirect I/O registers (0x0c00 and 0x0c01). The Index register * format is (PCIIRQ## | 0x10), e.g.: PCIIRQ10=0x1a. The Redirect * register is a straight binary coding of desired PIC IRQ (low nibble). * * The 'link' value in the PIRQ table is already in the correct format * for the Index register. There are some special index values: * 0x00 for ACPI (SCI), 0x01 for USB, 0x02 for IDE0, 0x04 for IDE1, * and 0x03 for SMBus. */ static int pirq_serverworks_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { outb(pirq, 0xc00); return inb(0xc01) & 0xf; } static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { outb(pirq, 0xc00); outb(irq, 0xc01); return 1; } /* Support for AMD756 PCI IRQ Routing * Jhon H. Caicedo * Jun/21/2001 0.2.0 Release, fixed to use "nybble" functions... (jhcaiced) * Jun/19/2001 Alpha Release 0.1.0 (jhcaiced) * The AMD756 pirq rules are nibble-based * offset 0x56 0-3 PIRQA 4-7 PIRQB * offset 0x57 0-3 PIRQC 4-7 PIRQD */ static int pirq_amd756_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { u8 irq; irq = 0; if (pirq <= 4) irq = read_config_nybble(router, 0x56, pirq - 1); dev_info(&dev->dev, "AMD756: dev [%04x:%04x], router PIRQ %d get IRQ %d\n", dev->vendor, dev->device, pirq, irq); return irq; } static int pirq_amd756_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { dev_info(&dev->dev, "AMD756: dev [%04x:%04x], router PIRQ %d set IRQ %d\n", dev->vendor, dev->device, pirq, irq); if (pirq <= 4) write_config_nybble(router, 0x56, pirq - 1, irq); return 1; } /* * PicoPower PT86C523 */ static int pirq_pico_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { outb(0x10 + ((pirq - 1) >> 1), 0x24); return ((pirq - 1) & 1) ? (inb(0x26) >> 4) : (inb(0x26) & 0xf); } static int pirq_pico_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { unsigned int x; outb(0x10 + ((pirq - 1) >> 1), 0x24); x = inb(0x26); x = ((pirq - 1) & 1) ? ((x & 0x0f) | (irq << 4)) : ((x & 0xf0) | (irq)); outb(x, 0x26); return 1; } #ifdef CONFIG_PCI_BIOS static int pirq_bios_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { struct pci_dev *bridge; int pin = pci_get_interrupt_pin(dev, &bridge); return pcibios_set_irq_routing(bridge, pin - 1, irq); } #endif static __init int intel_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { static struct pci_device_id __initdata pirq_440gx[] = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_0) }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_2) }, { }, }; /* 440GX has a proprietary PIRQ router -- don't use it */ if (pci_dev_present(pirq_440gx)) return 0; switch (device) { case PCI_DEVICE_ID_INTEL_82371FB_0: case PCI_DEVICE_ID_INTEL_82371SB_0: case PCI_DEVICE_ID_INTEL_82371AB_0: case PCI_DEVICE_ID_INTEL_82371MX: case PCI_DEVICE_ID_INTEL_82443MX_0: case PCI_DEVICE_ID_INTEL_82801AA_0: case PCI_DEVICE_ID_INTEL_82801AB_0: case PCI_DEVICE_ID_INTEL_82801BA_0: case PCI_DEVICE_ID_INTEL_82801BA_10: case PCI_DEVICE_ID_INTEL_82801CA_0: case PCI_DEVICE_ID_INTEL_82801CA_12: case PCI_DEVICE_ID_INTEL_82801DB_0: case PCI_DEVICE_ID_INTEL_82801E_0: case PCI_DEVICE_ID_INTEL_82801EB_0: case PCI_DEVICE_ID_INTEL_ESB_1: case PCI_DEVICE_ID_INTEL_ICH6_0: case PCI_DEVICE_ID_INTEL_ICH6_1: case PCI_DEVICE_ID_INTEL_ICH7_0: case PCI_DEVICE_ID_INTEL_ICH7_1: case PCI_DEVICE_ID_INTEL_ICH7_30: case PCI_DEVICE_ID_INTEL_ICH7_31: case PCI_DEVICE_ID_INTEL_TGP_LPC: case PCI_DEVICE_ID_INTEL_ESB2_0: case PCI_DEVICE_ID_INTEL_ICH8_0: case PCI_DEVICE_ID_INTEL_ICH8_1: case PCI_DEVICE_ID_INTEL_ICH8_2: case PCI_DEVICE_ID_INTEL_ICH8_3: case PCI_DEVICE_ID_INTEL_ICH8_4: case PCI_DEVICE_ID_INTEL_ICH9_0: case PCI_DEVICE_ID_INTEL_ICH9_1: case PCI_DEVICE_ID_INTEL_ICH9_2: case PCI_DEVICE_ID_INTEL_ICH9_3: case PCI_DEVICE_ID_INTEL_ICH9_4: case PCI_DEVICE_ID_INTEL_ICH9_5: case PCI_DEVICE_ID_INTEL_TOLAPAI_0: case PCI_DEVICE_ID_INTEL_ICH10_0: case PCI_DEVICE_ID_INTEL_ICH10_1: case PCI_DEVICE_ID_INTEL_ICH10_2: case PCI_DEVICE_ID_INTEL_ICH10_3: r->name = "PIIX/ICH"; r->get = pirq_piix_get; r->set = pirq_piix_set; return 1; } if ((device >= PCI_DEVICE_ID_INTEL_PCH_LPC_MIN) && (device <= PCI_DEVICE_ID_INTEL_PCH_LPC_MAX)) { r->name = "PIIX/ICH"; r->get = pirq_piix_get; r->set = pirq_piix_set; return 1; } return 0; } static __init int via_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { /* FIXME: We should move some of the quirk fixup stuff here */ /* * workarounds for some buggy BIOSes */ if (device == PCI_DEVICE_ID_VIA_82C586_0) { switch (router->device) { case PCI_DEVICE_ID_VIA_82C686: /* * Asus k7m bios wrongly reports 82C686A * as 586-compatible */ device = PCI_DEVICE_ID_VIA_82C686; break; case PCI_DEVICE_ID_VIA_8235: /** * Asus a7v-x bios wrongly reports 8235 * as 586-compatible */ device = PCI_DEVICE_ID_VIA_8235; break; case PCI_DEVICE_ID_VIA_8237: /** * Asus a7v600 bios wrongly reports 8237 * as 586-compatible */ device = PCI_DEVICE_ID_VIA_8237; break; } } switch (device) { case PCI_DEVICE_ID_VIA_82C586_0: r->name = "VIA"; r->get = pirq_via586_get; r->set = pirq_via586_set; return 1; case PCI_DEVICE_ID_VIA_82C596: case PCI_DEVICE_ID_VIA_82C686: case PCI_DEVICE_ID_VIA_8231: case PCI_DEVICE_ID_VIA_8233A: case PCI_DEVICE_ID_VIA_8235: case PCI_DEVICE_ID_VIA_8237: /* FIXME: add new ones for 8233/5 */ r->name = "VIA"; r->get = pirq_via_get; r->set = pirq_via_set; return 1; } return 0; } static __init int vlsi_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { switch (device) { case PCI_DEVICE_ID_VLSI_82C534: r->name = "VLSI 82C534"; r->get = pirq_vlsi_get; r->set = pirq_vlsi_set; return 1; } return 0; } static __init int serverworks_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { switch (device) { case PCI_DEVICE_ID_SERVERWORKS_OSB4: case PCI_DEVICE_ID_SERVERWORKS_CSB5: r->name = "ServerWorks"; r->get = pirq_serverworks_get; r->set = pirq_serverworks_set; return 1; } return 0; } static __init int sis_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { if (device != PCI_DEVICE_ID_SI_503) return 0; r->name = "SIS"; r->get = pirq_sis_get; r->set = pirq_sis_set; return 1; } static __init int cyrix_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { switch (device) { case PCI_DEVICE_ID_CYRIX_5520: r->name = "NatSemi"; r->get = pirq_cyrix_get; r->set = pirq_cyrix_set; return 1; } return 0; } static __init int opti_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { switch (device) { case PCI_DEVICE_ID_OPTI_82C700: r->name = "OPTI"; r->get = pirq_opti_get; r->set = pirq_opti_set; return 1; } return 0; } static __init int ite_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { switch (device) { case PCI_DEVICE_ID_ITE_IT8330G_0: r->name = "ITE"; r->get = pirq_ite_get; r->set = pirq_ite_set; return 1; } return 0; } static __init int ali_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { switch (device) { case PCI_DEVICE_ID_AL_M1533: case PCI_DEVICE_ID_AL_M1563: r->name = "ALI"; r->get = pirq_ali_get; r->set = pirq_ali_set; return 1; } return 0; } static __init int amd_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { switch (device) { case PCI_DEVICE_ID_AMD_VIPER_740B: r->name = "AMD756"; break; case PCI_DEVICE_ID_AMD_VIPER_7413: r->name = "AMD766"; break; case PCI_DEVICE_ID_AMD_VIPER_7443: r->name = "AMD768"; break; default: return 0; } r->get = pirq_amd756_get; r->set = pirq_amd756_set; return 1; } static __init int pico_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) { switch (device) { case PCI_DEVICE_ID_PICOPOWER_PT86C523: r->name = "PicoPower PT86C523"; r->get = pirq_pico_get; r->set = pirq_pico_set; return 1; case PCI_DEVICE_ID_PICOPOWER_PT86C523BBP: r->name = "PicoPower PT86C523 rev. BB+"; r->get = pirq_pico_get; r->set = pirq_pico_set; return 1; } return 0; } static __initdata struct irq_router_handler pirq_routers[] = { { PCI_VENDOR_ID_INTEL, intel_router_probe }, { PCI_VENDOR_ID_AL, ali_router_probe }, { PCI_VENDOR_ID_ITE, ite_router_probe }, { PCI_VENDOR_ID_VIA, via_router_probe }, { PCI_VENDOR_ID_OPTI, opti_router_probe }, { PCI_VENDOR_ID_SI, sis_router_probe }, { PCI_VENDOR_ID_CYRIX, cyrix_router_probe }, { PCI_VENDOR_ID_VLSI, vlsi_router_probe }, { PCI_VENDOR_ID_SERVERWORKS, serverworks_router_probe }, { PCI_VENDOR_ID_AMD, amd_router_probe }, { PCI_VENDOR_ID_PICOPOWER, pico_router_probe }, /* Someone with docs needs to add the ATI Radeon IGP */ { 0, NULL } }; static struct irq_router pirq_router; static struct pci_dev *pirq_router_dev; /* * FIXME: should we have an option to say "generic for * chipset" ? */ static void __init pirq_find_router(struct irq_router *r) { struct irq_routing_table *rt = pirq_table; struct irq_router_handler *h; #ifdef CONFIG_PCI_BIOS if (!rt->signature) { printk(KERN_INFO "PCI: Using BIOS for IRQ routing\n"); r->set = pirq_bios_set; r->name = "BIOS"; return; } #endif /* Default unless a driver reloads it */ r->name = "default"; r->get = NULL; r->set = NULL; DBG(KERN_DEBUG "PCI: Attempting to find IRQ router for [%04x:%04x]\n", rt->rtr_vendor, rt->rtr_device); pirq_router_dev = pci_get_bus_and_slot(rt->rtr_bus, rt->rtr_devfn); if (!pirq_router_dev) { DBG(KERN_DEBUG "PCI: Interrupt router not found at " "%02x:%02x\n", rt->rtr_bus, rt->rtr_devfn); return; } for (h = pirq_routers; h->vendor; h++) { /* First look for a router match */ if (rt->rtr_vendor == h->vendor && h->probe(r, pirq_router_dev, rt->rtr_device)) break; /* Fall back to a device match */ if (pirq_router_dev->vendor == h->vendor && h->probe(r, pirq_router_dev, pirq_router_dev->device)) break; } dev_info(&pirq_router_dev->dev, "%s IRQ router [%04x:%04x]\n", pirq_router.name, pirq_router_dev->vendor, pirq_router_dev->device); /* The device remains referenced for the kernel lifetime */ } static struct irq_info *pirq_get_info(struct pci_dev *dev) { struct irq_routing_table *rt = pirq_table; int entries = (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); struct irq_info *info; for (info = rt->slots; entries--; info++) if (info->bus == dev->bus->number && PCI_SLOT(info->devfn) == PCI_SLOT(dev->devfn)) return info; return NULL; } static int pcibios_lookup_irq(struct pci_dev *dev, int assign) { u8 pin; struct irq_info *info; int i, pirq, newirq; int irq = 0; u32 mask; struct irq_router *r = &pirq_router; struct pci_dev *dev2 = NULL; char *msg = NULL; /* Find IRQ pin */ pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); if (!pin) { dev_dbg(&dev->dev, "no interrupt pin\n"); return 0; } /* Find IRQ routing entry */ if (!pirq_table) return 0; info = pirq_get_info(dev); if (!info) { dev_dbg(&dev->dev, "PCI INT %c not found in routing table\n", 'A' + pin - 1); return 0; } pirq = info->irq[pin - 1].link; mask = info->irq[pin - 1].bitmap; if (!pirq) { dev_dbg(&dev->dev, "PCI INT %c not routed\n", 'A' + pin - 1); return 0; } dev_dbg(&dev->dev, "PCI INT %c -> PIRQ %02x, mask %04x, excl %04x", 'A' + pin - 1, pirq, mask, pirq_table->exclusive_irqs); mask &= pcibios_irq_mask; /* Work around broken HP Pavilion Notebooks which assign USB to IRQ 9 even though it is actually wired to IRQ 11 */ if (broken_hp_bios_irq9 && pirq == 0x59 && dev->irq == 9) { dev->irq = 11; pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11); r->set(pirq_router_dev, dev, pirq, 11); } /* same for Acer Travelmate 360, but with CB and irq 11 -> 10 */ if (acer_tm360_irqrouting && dev->irq == 11 && dev->vendor == PCI_VENDOR_ID_O2) { pirq = 0x68; mask = 0x400; dev->irq = r->get(pirq_router_dev, dev, pirq); pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); } /* * Find the best IRQ to assign: use the one * reported by the device if possible. */ newirq = dev->irq; if (newirq && !((1 << newirq) & mask)) { if (pci_probe & PCI_USE_PIRQ_MASK) newirq = 0; else dev_warn(&dev->dev, "IRQ %d doesn't match PIRQ mask " "%#x; try pci=usepirqmask\n", newirq, mask); } if (!newirq && assign) { for (i = 0; i < 16; i++) { if (!(mask & (1 << i))) continue; if (pirq_penalty[i] < pirq_penalty[newirq] && can_request_irq(i, IRQF_SHARED)) newirq = i; } } dev_dbg(&dev->dev, "PCI INT %c -> newirq %d", 'A' + pin - 1, newirq); /* Check if it is hardcoded */ if ((pirq & 0xf0) == 0xf0) { irq = pirq & 0xf; msg = "hardcoded"; } else if (r->get && (irq = r->get(pirq_router_dev, dev, pirq)) && \ ((!(pci_probe & PCI_USE_PIRQ_MASK)) || ((1 << irq) & mask))) { msg = "found"; eisa_set_level_irq(irq); } else if (newirq && r->set && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) { if (r->set(pirq_router_dev, dev, pirq, newirq)) { eisa_set_level_irq(newirq); msg = "assigned"; irq = newirq; } } if (!irq) { if (newirq && mask == (1 << newirq)) { msg = "guessed"; irq = newirq; } else { dev_dbg(&dev->dev, "can't route interrupt\n"); return 0; } } dev_info(&dev->dev, "%s PCI INT %c -> IRQ %d\n", msg, 'A' + pin - 1, irq); /* Update IRQ for all devices with the same pirq value */ while ((dev2 = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev2)) != NULL) { pci_read_config_byte(dev2, PCI_INTERRUPT_PIN, &pin); if (!pin) continue; info = pirq_get_info(dev2); if (!info) continue; if (info->irq[pin - 1].link == pirq) { /* * We refuse to override the dev->irq * information. Give a warning! */ if (dev2->irq && dev2->irq != irq && \ (!(pci_probe & PCI_USE_PIRQ_MASK) || \ ((1 << dev2->irq) & mask))) { #ifndef CONFIG_PCI_MSI dev_info(&dev2->dev, "IRQ routing conflict: " "have IRQ %d, want IRQ %d\n", dev2->irq, irq); #endif continue; } dev2->irq = irq; pirq_penalty[irq]++; if (dev != dev2) dev_info(&dev->dev, "sharing IRQ %d with %s\n", irq, pci_name(dev2)); } } return 1; } static void __init pcibios_fixup_irqs(void) { struct pci_dev *dev = NULL; u8 pin; DBG(KERN_DEBUG "PCI: IRQ fixup\n"); while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { /* * If the BIOS has set an out of range IRQ number, just * ignore it. Also keep track of which IRQ's are * already in use. */ if (dev->irq >= 16) { dev_dbg(&dev->dev, "ignoring bogus IRQ %d\n", dev->irq); dev->irq = 0; } /* * If the IRQ is already assigned to a PCI device, * ignore its ISA use penalty */ if (pirq_penalty[dev->irq] >= 100 && pirq_penalty[dev->irq] < 100000) pirq_penalty[dev->irq] = 0; pirq_penalty[dev->irq]++; } dev = NULL; while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); if (!pin) continue; #ifdef CONFIG_X86_IO_APIC /* * Recalculate IRQ numbers if we use the I/O APIC. */ if (io_apic_assign_pci_irqs) { int irq; int ioapic = -1, ioapic_pin = -1; int triggering, polarity; /* * interrupt pins are numbered starting from 1 */ irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin - 1, &ioapic, &ioapic_pin, &triggering, &polarity); /* * Busses behind bridges are typically not listed in the * MP-table. In this case we have to look up the IRQ * based on the parent bus, parent slot, and pin number. * The SMP code detects such bridged busses itself so we * should get into this branch reliably. */ if (irq < 0 && dev->bus->parent) { /* go back to the bridge */ struct pci_dev *bridge = dev->bus->self; int bus; pin = pci_swizzle_interrupt_pin(dev, pin); bus = bridge->bus->number; irq = IO_APIC_get_PCI_irq_vector(bus, PCI_SLOT(bridge->devfn), pin - 1, &ioapic, &ioapic_pin, &triggering, &polarity); if (irq >= 0) dev_warn(&dev->dev, "using bridge %s INT %c to " "get IRQ %d\n", pci_name(bridge), 'A' + pin - 1, irq); } if (irq >= 0) { dev_info(&dev->dev, "PCI->APIC IRQ transform: INT %c " "-> IRQ %d\n", 'A' + pin - 1, irq); dev->irq = irq; } } #endif /* * Still no IRQ? Try to lookup one... */ if (!dev->irq) pcibios_lookup_irq(dev, 0); } } /* * Work around broken HP Pavilion Notebooks which assign USB to * IRQ 9 even though it is actually wired to IRQ 11 */ static int __init fix_broken_hp_bios_irq9(const struct dmi_system_id *d) { if (!broken_hp_bios_irq9) { broken_hp_bios_irq9 = 1; printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident); } return 0; } /* * Work around broken Acer TravelMate 360 Notebooks which assign * Cardbus to IRQ 11 even though it is actually wired to IRQ 10 */ static int __init fix_acer_tm360_irqrouting(const struct dmi_system_id *d) { if (!acer_tm360_irqrouting) { acer_tm360_irqrouting = 1; printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident); } return 0; } static struct dmi_system_id __initdata pciirq_dmi_table[] = { { .callback = fix_broken_hp_bios_irq9, .ident = "HP Pavilion N5400 Series Laptop", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), DMI_MATCH(DMI_BIOS_VERSION, "GE.M1.03"), DMI_MATCH(DMI_PRODUCT_VERSION, "HP Pavilion Notebook Model GE"), DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"), }, }, { .callback = fix_acer_tm360_irqrouting, .ident = "Acer TravelMate 36x Laptop", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Acer"), DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), }, }, { } }; int __init pcibios_irq_init(void) { DBG(KERN_DEBUG "PCI: IRQ init\n"); if (pcibios_enable_irq || raw_pci_ops == NULL) return 0; dmi_check_system(pciirq_dmi_table); pirq_table = pirq_find_routing_table(); #ifdef CONFIG_PCI_BIOS if (!pirq_table && (pci_probe & PCI_BIOS_IRQ_SCAN)) pirq_table = pcibios_get_irq_routing_table(); #endif if (pirq_table) { pirq_peer_trick(); pirq_find_router(&pirq_router); if (pirq_table->exclusive_irqs) { int i; for (i = 0; i < 16; i++) if (!(pirq_table->exclusive_irqs & (1 << i))) pirq_penalty[i] += 100; } /* * If we're using the I/O APIC, avoid using the PCI IRQ * routing table */ if (io_apic_assign_pci_irqs) pirq_table = NULL; } pcibios_enable_irq = pirq_enable_irq; pcibios_fixup_irqs(); return 0; } static void pirq_penalize_isa_irq(int irq, int active) { /* * If any ISAPnP device reports an IRQ in its list of possible * IRQ's, we try to avoid assigning it to PCI devices. */ if (irq < 16) { if (active) pirq_penalty[irq] += 1000; else pirq_penalty[irq] += 100; } } void pcibios_penalize_isa_irq(int irq, int active) { #ifdef CONFIG_ACPI if (!acpi_noirq) acpi_penalize_isa_irq(irq, active); else #endif pirq_penalize_isa_irq(irq, active); } static int pirq_enable_irq(struct pci_dev *dev) { u8 pin; struct pci_dev *temp_dev; pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) { char *msg = ""; if (io_apic_assign_pci_irqs) { int irq; int ioapic = -1, ioapic_pin = -1; int triggering, polarity; irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin - 1, &ioapic, &ioapic_pin, &triggering, &polarity); /* * Busses behind bridges are typically not listed in the MP-table. * In this case we have to look up the IRQ based on the parent bus, * parent slot, and pin number. The SMP code detects such bridged * busses itself so we should get into this branch reliably. */ temp_dev = dev; while (irq < 0 && dev->bus->parent) { /* go back to the bridge */ struct pci_dev *bridge = dev->bus->self; pin = pci_swizzle_interrupt_pin(dev, pin); irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number, PCI_SLOT(bridge->devfn), pin - 1, &ioapic, &ioapic_pin, &triggering, &polarity); if (irq >= 0) dev_warn(&dev->dev, "using bridge %s " "INT %c to get IRQ %d\n", pci_name(bridge), 'A' + pin - 1, irq); dev = bridge; } dev = temp_dev; if (irq >= 0) { dev_info(&dev->dev, "PCI->APIC IRQ transform: " "INT %c -> IRQ %d\n", 'A' + pin - 1, irq); dev->irq = irq; return 0; } else msg = "; probably buggy MP table"; } else if (pci_probe & PCI_BIOS_IRQ_SCAN) msg = ""; else msg = "; please try using pci=biosirq"; /* * With IDE legacy devices the IRQ lookup failure is not * a problem.. */ if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && !(dev->class & 0x5)) return 0; dev_warn(&dev->dev, "can't find IRQ for PCI INT %c%s\n", 'A' + pin - 1, msg); } return 0; }