LXR linux/arch/arm/mach-footbridge/cats-pci.c

   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 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