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
  15 /* cats host-specific stuff */
  16 static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };
  17
  18 static int __init cats_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  19 {
  20         if (dev->irq >= 128)
  21                 return dev->irq & 0x1f;
  22
  23         if (dev->irq >= 1 && dev->irq <= 4)
  24                 return irqmap_cats[dev->irq - 1];
  25
  26         if (dev->irq != 0)
  27                 printk("PCI: device %02x:%02x has unknown irq line %x\n",
  28                        dev->bus->number, dev->devfn, dev->irq);
  29
  30         return -1;
  31 }
  32
  33 struct hw_pci cats_pci __initdata = {
  34         init:           dc21285_init,
  35         swizzle:        no_swizzle,
  36         map_irq:        cats_map_irq,
  37 };