projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | ||
| d5341942 | 19 | static int __init cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| 1da177e4 | 20 | { |
| e38d523f BD |
21 | if (dev->irq >= 255) |
| 22 | return -1; /* not a valid interrupt. */ | |
| 23 | ||
| 1da177e4 LT |
24 | if (dev->irq >= 128) |
| 25 | return dev->irq & 0x1f; | |
| 26 | ||
| 27 | if (dev->irq >= 1 && dev->irq <= 4) | |
| 28 | return irqmap_cats[dev->irq - 1]; | |
| 29 | ||
| 30 | if (dev->irq != 0) | |
| 31 | printk("PCI: device %02x:%02x has unknown irq line %x\n", | |
| 32 | dev->bus->number, dev->devfn, dev->irq); | |
| 33 | ||
| 34 | return -1; | |
| 35 | } | |
| 36 | ||
| 37 | /* | |
| 38 | * why not the standard PCI swizzle? does this prevent 4-port tulip | |
| 39 | * cards being used (ie, pci-pci bridge based cards)? | |
| 40 | */ | |
| 41 | static struct hw_pci cats_pci __initdata = { | |
| 42 | .swizzle = NULL, | |
| 43 | .map_irq = cats_map_irq, | |
| 44 | .nr_controllers = 1, | |
| 45 | .setup = dc21285_setup, | |
| 46 | .scan = dc21285_scan_bus, | |
| 47 | .preinit = dc21285_preinit, | |
| 48 | .postinit = dc21285_postinit, | |
| 49 | }; | |
| 50 | ||
| cdea4606 | 51 | static int __init cats_pci_init(void) |
| 1da177e4 LT |
52 | { |
| 53 | if (machine_is_cats()) | |
| 54 | pci_common_init(&cats_pci); | |
| 55 | return 0; | |
| 56 | } | |
| 57 | ||
| 58 | subsys_initcall(cats_pci_init); |