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 u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin)
20{
21	return 0;
22}
23
24static int __init cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
25{
26	if (dev->irq >= 255)
27		return -1;	/* not a valid interrupt. */
28
29	if (dev->irq >= 128)
30		return dev->irq & 0x1f;
31
32	if (dev->irq >= 1 && dev->irq <= 4)
33		return irqmap_cats[dev->irq - 1];
34
35	if (dev->irq != 0)
36		printk("PCI: device %02x:%02x has unknown irq line %x\n",
37		       dev->bus->number, dev->devfn, dev->irq);
38
39	return -1;
40}
41
42/*
43 * why not the standard PCI swizzle?  does this prevent 4-port tulip
44 * cards being used (ie, pci-pci bridge based cards)?
45 */
46static struct hw_pci cats_pci __initdata = {
47	.swizzle		= cats_no_swizzle,
48	.map_irq		= cats_map_irq,
49	.nr_controllers		= 1,
50	.ops			= &dc21285_ops,
51	.setup			= dc21285_setup,
52	.preinit		= dc21285_preinit,
53	.postinit		= dc21285_postinit,
54};
55
56static int __init cats_pci_init(void)
57{
58	if (machine_is_cats())
59		pci_common_init(&cats_pci);
60	return 0;
61}
62
63subsys_initcall(cats_pci_init);
64