arch/sh/drivers/pci/fixups-sh03.c

   1 #include <linux/kernel.h>
   2 #include <linux/init.h>
   3 #include <linux/types.h>
   4 #include <linux/pci.h>
   5
   6 /*
   7  *      IRQ functions
   8  */
   9
  10 int __init pcibios_map_platform_irq(u8 slot, u8 pin, struct pci_dev *dev)
  11 {
  12         int irq;
  13
  14         if (dev->bus->number == 0) {
  15                 switch (slot) {
  16                 case 4: return 5;       /* eth0       */
  17                 case 8: return 5;       /* eth1       */
  18                 case 6: return 2;       /* PCI bridge */
  19                 default:
  20                         printk("PCI: Bad IRQ mapping request for slot %d\n", slot);
  21                         return 2;
  22                 }
  23         } else {
  24                 switch (pin) {
  25                 case 0:   irq =  2; break;
  26                 case 1:   irq =  2; break;
  27                 case 2:   irq =  2; break;
  28                 case 3:   irq =  2; break;
  29                 case 4:   irq =  2; break;
  30                 default:  irq = -1; break;
  31                 }
  32         }
  33         return irq;
  34 }
  35
  36 static u8 __init sh03_no_swizzle(struct pci_dev *dev, u8 *pin)
  37 {
  38         /* no swizzling */
  39         return PCI_SLOT(dev->devfn);
  40 }
  41
  42 static int sh03_pci_lookup_irq(struct pci_dev *dev, u8 slot, u8 pin)
  43 {
  44         int irq = -1;
  45
  46         /* now lookup the actual IRQ on a platform specific basis (pci-'platform'.c) */
  47         irq = pcibios_map_platform_irq(slot, pin, dev);
  48         if( irq < 0 ) {
  49                 pr_debug("PCI: Error mapping IRQ on device %s\n", pci_name(dev));
  50                 return irq;
  51         }
  52
  53         pr_debug("Setting IRQ for slot %s to %d\n", pci_name(dev), irq);
  54
  55         return irq;
  56 }
  57
  58 void __init pcibios_fixup_irqs(void)
  59 {
  60         pci_fixup_irqs(sh03_no_swizzle, sh03_pci_lookup_irq);
  61 }