diff options
Diffstat (limited to 'arch/i386/pci/irq.c')
| -rw-r--r-- | arch/i386/pci/irq.c | 1173 |
1 files changed, 0 insertions, 1173 deletions
diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c deleted file mode 100644 index 8434f2323b8..00000000000 --- a/arch/i386/pci/irq.c +++ /dev/null @@ -1,1173 +0,0 @@ -/* - * Low-Level PCI Support for PC -- Routing of Interrupts - * - * (c) 1999--2000 Martin Mares <mj@ucw.cz> - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/dmi.h> -#include <asm/io.h> -#include <asm/smp.h> -#include <asm/io_apic.h> -#include <linux/irq.h> -#include <linux/acpi.h> - -#include "pci.h" - -#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++) { - if (!busmap[i] || pci_find_bus(0, i)) - continue; - if (pci_scan_bus_with_sysdata(i)) - 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: nybbles 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 }; - - 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]; - - 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 }; - 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 }; - 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 }; - 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 }; - 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) -{ - if (pirq > 8) { - printk(KERN_INFO "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) -{ - if (pirq > 8) { - printk(KERN_INFO "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_p(pirq, 0xc00); - return inb(0xc01) & 0xf; -} - -static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) -{ - outb_p(pirq, 0xc00); - outb_p(irq, 0xc01); - return 1; -} - -/* Support for AMD756 PCI IRQ Routing - * Jhon H. Caicedo <jhcaiced@osso.org.co> - * 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); - } - printk(KERN_INFO "AMD756: dev %04x:%04x, router pirq : %d get irq : %2d\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) -{ - printk(KERN_INFO "AMD756: dev %04x:%04x, router pirq : %d SET irq : %2d\n", - dev->vendor, dev->device, pirq, irq); - if (pirq <= 4) - { - write_config_nybble(router, 0x56, pirq - 1, irq); - } - 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, 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_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: - 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 */ - - /* - * work arounds 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; - } - } - - 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: - printk(KERN_DEBUG "PCI: Using ALI IRQ Router\n"); - 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 __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 }, - /* 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; - } - printk(KERN_INFO "PCI: Using IRQ router %s [%04x/%04x] at %s\n", - pirq_router.name, - pirq_router_dev->vendor, - pirq_router_dev->device, - pci_name(pirq_router_dev)); - - /* 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) { - DBG(KERN_DEBUG " -> no interrupt pin\n"); - return 0; - } - pin = pin - 1; - - /* Find IRQ routing entry */ - - if (!pirq_table) - return 0; - - DBG(KERN_DEBUG "IRQ for %s[%c]", pci_name(dev), 'A' + pin); - info = pirq_get_info(dev); - if (!info) { - DBG(" -> not found in routing table\n" KERN_DEBUG); - return 0; - } - pirq = info->irq[pin].link; - mask = info->irq[pin].bitmap; - if (!pirq) { - DBG(" -> not routed\n" KERN_DEBUG); - return 0; - } - DBG(" -> PIRQ %02x, mask %04x, excl %04x", 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 printk("\n" KERN_WARNING - "PCI: IRQ %i for device %s doesn't match PIRQ mask " - "- try pci=usepirqmask\n" KERN_DEBUG, newirq, - pci_name(dev)); - } - 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; - } - } - DBG(" -> newirq=%d", newirq); - - /* Check if it is hardcoded */ - if ((pirq & 0xf0) == 0xf0) { - irq = pirq & 0xf; - DBG(" -> hardcoded IRQ %d\n", irq); - msg = "Hardcoded"; - } else if ( r->get && (irq = r->get(pirq_router_dev, dev, pirq)) && \ - ((!(pci_probe & PCI_USE_PIRQ_MASK)) || ((1 << irq) & mask)) ) { - DBG(" -> got IRQ %d\n", irq); - msg = "Found"; - eisa_set_level_irq(irq); - } else if (newirq && r->set && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) { - DBG(" -> assigning IRQ %d", newirq); - if (r->set(pirq_router_dev, dev, pirq, newirq)) { - eisa_set_level_irq(newirq); - DBG(" ... OK\n"); - msg = "Assigned"; - irq = newirq; - } - } - - if (!irq) { - DBG(" ... failed\n"); - if (newirq && mask == (1 << newirq)) { - msg = "Guessed"; - irq = newirq; - } else - return 0; - } - printk(KERN_INFO "PCI: %s IRQ %d for device %s\n", msg, irq, pci_name(dev)); - - /* 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; - pin--; - info = pirq_get_info(dev2); - if (!info) - continue; - if (info->irq[pin].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 - printk(KERN_INFO "IRQ routing conflict for %s, have irq %d, want irq %d\n", - pci_name(dev2), dev2->irq, irq); -#endif - continue; - } - dev2->irq = irq; - pirq_penalty[irq]++; - if (dev != dev2) - printk(KERN_INFO "PCI: 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) { - DBG(KERN_DEBUG "%s: ignoring bogus IRQ %d\n", pci_name(dev), 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); -#ifdef CONFIG_X86_IO_APIC - /* - * Recalculate IRQ numbers if we use the I/O APIC. - */ - if (io_apic_assign_pci_irqs) - { - int irq; - - if (pin) { - pin--; /* interrupt pins are numbered starting from 1 */ - irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin); - /* - * 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; - - pin = (pin + PCI_SLOT(dev->devfn)) % 4; - irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number, - PCI_SLOT(bridge->devfn), pin); - if (irq >= 0) - printk(KERN_WARNING "PCI: using PPB %s[%c] to get irq %d\n", - pci_name(bridge), 'A' + pin, irq); - } - if (irq >= 0) { - printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n", - pci_name(dev), 'A' + pin, irq); - dev->irq = irq; - } - } - } -#endif - /* - * Still no IRQ? Try to lookup one... - */ - if (pin && !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(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(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"), - }, - }, - { } -}; - -static 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; -} - -subsys_initcall(pcibios_irq_init); - - -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 = ""; - - pin--; /* interrupt pins are numbered starting from 1 */ - - if (io_apic_assign_pci_irqs) { - int irq; - - irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin); - /* - * 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 = (pin + PCI_SLOT(dev->devfn)) % 4; - irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number, - PCI_SLOT(bridge->devfn), pin); - if (irq >= 0) - printk(KERN_WARNING "PCI: using PPB %s[%c] to get irq %d\n", - pci_name(bridge), 'A' + pin, irq); - dev = bridge; - } - dev = temp_dev; - if (irq >= 0) { - printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n", - pci_name(dev), 'A' + pin, 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; - - printk(KERN_WARNING "PCI: No IRQ known for interrupt pin %c of device %s.%s\n", - 'A' + pin, pci_name(dev), msg); - } - return 0; -} |