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 >= 255) 22 return -1; /* not a valid interrupt. */ 23 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 */ 41static 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 51static int __init cats_pci_init(void) 52{ 53 if (machine_is_cats()) 54 pci_common_init(&cats_pci); 55 return 0; 56} 57 58subsys_initcall(cats_pci_init); 59