ftv-pci.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- /*
- * 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,
- };