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cats-pci.c

/*
 * linux/arch/arm/mach-footbridge/cats-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>
#include <asm/mach-types.h>

/* cats host-specific stuff */
static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };

static int __init cats_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
      if (dev->irq >= 128)
            return dev->irq & 0x1f;

      if (dev->irq >= 1 && dev->irq <= 4)
            return irqmap_cats[dev->irq - 1];

      if (dev->irq != 0)
            printk("PCI: device %02x:%02x has unknown irq line %x\n",
                   dev->bus->number, dev->devfn, dev->irq);

      return -1;
}

/*
 * why not the standard PCI swizzle?  does this prevent 4-port tulip
 * cards being used (ie, pci-pci bridge based cards)?
 */
static struct hw_pci cats_pci __initdata = {
      .swizzle          = NULL,
      .map_irq          = cats_map_irq,
      .nr_controllers         = 1,
      .setup                  = dc21285_setup,
      .scan             = dc21285_scan_bus,
      .preinit          = dc21285_preinit,
      .postinit         = dc21285_postinit,
};

static int __init cats_pci_init(void)
{
      if (machine_is_cats())
            pci_common_init(&cats_pci);
      return 0;
}

subsys_initcall(cats_pci_init);

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