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 */ 17static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 }; 18 19static 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 */ 38static 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 48static int __init cats_pci_init(void) 49{ 50 if (machine_is_cats()) 51 pci_common_init(&cats_pci); 52 return 0; 53} 54 55subsys_initcall(cats_pci_init); 56