arch/arm/mach-footbridge/ebsa285-pci.c

   1 /*
   2  * linux/arch/arm/mach-footbridge/ebsa285-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/hardware/dec21285.h>
  15
  16 static int irqmap_ebsa285[] __initdata = { IRQ_IN3, IRQ_IN1, IRQ_IN0, IRQ_PCI };
  17
  18 static u8 __init ebsa285_swizzle(struct pci_dev *dev, u8 *pin)
  19 {
  20         return PCI_SLOT(dev->devfn);
  21 }
  22
  23 static int __init ebsa285_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  24 {
  25         if (dev->vendor == PCI_VENDOR_ID_CONTAQ &&
  26             dev->device == PCI_DEVICE_ID_CONTAQ_82C693)
  27                 switch (PCI_FUNC(dev->devfn)) {
  28                         case 1: return 14;
  29                         case 2: return 15;
  30                         case 3: return 12;
  31                 }
  32
  33         return irqmap_ebsa285[(slot + pin) & 3];
  34 }
  35
  36 struct hw_pci ebsa285_pci __initdata = {
  37         .setup_resources        = dc21285_setup_resources,
  38         .init                   = dc21285_init,
  39         .mem_offset             = DC21285_PCI_MEM,
  40         .swizzle                = ebsa285_swizzle,
  41         .map_irq                = ebsa285_map_irq,
  42 };