/* *  linux/arch/arm/kernel/ftv-pci.c * *  PCI bios-type initialisation for PCI machines * *  Bits taken from various places. */#include <linux/kernel.h>#include <linux/pci.h>#include <linux/init.h>#include <asm/irq.h>#include <asm/mach/pci.h>/* * Owing to a PCB cockup, issue A backplanes are wired thus: * * Slot 1    2    3    4    5   Bridge   S1    S2    S3    S4 * IRQ  D    C    B    A    A            C     B     A     D *      A    D    C    B    B            D     C     B     A *      B    A    D    C    C            A     D     C     B *      C    B    A    D    D            B     A     D     C * * ID A31  A30  A29  A28  A27   A26      DEV4  DEV5  DEV6  DEV7 * * Actually, this isn't too bad, because with the processor card * in slot 5 on the primary bus, the IRQs rotate on both sides * as you'd expect. */static int irqmap_ftv[] __initdata = { IRQ_PCI_D, IRQ_PCI_C, IRQ_PCI_B, IRQ_PCI_A };static int __init ftv_map_irq(struct pci_dev *dev, u8 slot, u8 pin){	if (slot > 0x10)		slot--;	return irqmap_ftv[(slot - pin) & 3];}static u8 __init ftv_swizzle(struct pci_dev *dev, u8 *pin){	return PCI_SLOT(dev->devfn);}/* ftv host-specific stuff */struct hw_pci ftv_pci __initdata = {	init:		plx90x0_init,	swizzle:	ftv_swizzle,	map_irq:	ftv_map_irq,};