| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-footbridge/cats-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 | /* cats host-specific stuff */ |
| 17 | static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 }; |
| 18 | |
| 19 | static int __init cats_map_irq(struct pci_dev *dev, u8 slot, u8 pin) |
| 20 | { |
| 21 | if (dev->irq >= 128) |
| 22 | return dev->irq & 0x1f; |
| 23 | |
| 24 | if (dev->irq >= 1 && dev->irq <= 4) |
| 25 | return irqmap_cats[dev->irq - 1]; |
| 26 | |
| 27 | if (dev->irq != 0) |
| 28 | printk("PCI: device %02x:%02x has unknown irq line %x\n", |
| 29 | dev->bus->number, dev->devfn, dev->irq); |
| 30 | |
| 31 | return -1; |
| 32 | } |
| 33 | |
| 34 | /* |
| 35 | * why not the standard PCI swizzle? does this prevent 4-port tulip |
| 36 | * cards being used (ie, pci-pci bridge based cards)? |
| 37 | */ |
| 38 | static struct hw_pci cats_pci __initdata = { |
| 39 | .swizzle = NULL, |
| 40 | .map_irq = cats_map_irq, |
| 41 | .nr_controllers = 1, |
| 42 | .setup = dc21285_setup, |
| 43 | .scan = dc21285_scan_bus, |
| 44 | .preinit = dc21285_preinit, |
| 45 | .postinit = dc21285_postinit, |
| 46 | }; |
| 47 | |
| 48 | static int cats_pci_init(void) |
| 49 | { |
| 50 | if (machine_is_cats()) |
| 51 | pci_common_init(&cats_pci); |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | subsys_initcall(cats_pci_init); |