| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-footbridge/personal-pci.c |
| 3 | * |
| 4 | * PCI bios-type initialisation for PCI machines |
| 5 | * |
| 6 | * Bits taken from various places. |
| 7 | */ |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/pci.h> |
| 10 | #include <linux/init.h> |
| 11 | |
| 12 | #include <asm/irq.h> |
| 13 | #include <asm/mach/pci.h> |
| 14 | #include <asm/mach-types.h> |
| 15 | |
| 16 | static int irqmap_personal_server[] __initdata = { |
| 17 | IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0, |
| 18 | IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI |
| 19 | }; |
| 20 | |
| 21 | static int __init personal_server_map_irq(struct pci_dev *dev, u8 slot, u8 pin) |
| 22 | { |
| 23 | unsigned char line; |
| 24 | |
| 25 | pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line); |
| 26 | |
| 27 | if (line > 0x40 && line <= 0x5f) { |
| 28 | /* line corresponds to the bit controlling this interrupt |
| 29 | * in the footbridge. Ignore the first 8 interrupt bits, |
| 30 | * look up the rest in the map. IN0 is bit number 8 |
| 31 | */ |
| 32 | return irqmap_personal_server[(line & 0x1f) - 8]; |
| 33 | } else if (line == 0) { |
| 34 | /* no interrupt */ |
| 35 | return 0; |
| 36 | } else |
| 37 | return irqmap_personal_server[(line - 1) & 3]; |
| 38 | } |
| 39 | |
| 40 | static struct hw_pci personal_server_pci __initdata = { |
| 41 | .map_irq = personal_server_map_irq, |
| 42 | .nr_controllers = 1, |
| 43 | .setup = dc21285_setup, |
| 44 | .scan = dc21285_scan_bus, |
| 45 | .preinit = dc21285_preinit, |
| 46 | .postinit = dc21285_postinit, |
| 47 | }; |
| 48 | |
| 49 | static int __init personal_pci_init(void) |
| 50 | { |
| 51 | if (machine_is_personal_server()) |
| 52 | pci_common_init(&personal_server_pci); |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | subsys_initcall(personal_pci_init); |