blob: 4f984fde7375fc867d865bfae26ed53668c93f0c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 int __init cats_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
20{
21 if (dev->irq >= 128)
22 return dev->irq & 0x1f;
23
24 if (dev->irq >= 1 && dev->irq <= 4)
25 return irqmap_cats[dev->irq - 1];
26
27 if (dev->irq != 0)
28 printk("PCI: device %02x:%02x has unknown irq line %x\n",
29 dev->bus->number, dev->devfn, dev->irq);
30
31 return -1;
32}
33
34/*
35 * why not the standard PCI swizzle? does this prevent 4-port tulip
36 * cards being used (ie, pci-pci bridge based cards)?
37 */
38static struct hw_pci cats_pci __initdata = {
39 .swizzle = NULL,
40 .map_irq = cats_map_irq,
41 .nr_controllers = 1,
42 .setup = dc21285_setup,
43 .scan = dc21285_scan_bus,
44 .preinit = dc21285_preinit,
45 .postinit = dc21285_postinit,
46};
47
48static int cats_pci_init(void)
49{
50 if (machine_is_cats())
51 pci_common_init(&cats_pci);
52 return 0;
53}
54
55subsys_initcall(cats_pci_init);