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 */
17 static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };
18
19 static 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 */
38 static 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
48 static int __init cats_pci_init(void)
49 {
50 if (machine_is_cats())
51 pci_common_init(&cats_pci);
52 return 0;
53 }
54
55 subsys_initcall(cats_pci_init);
56
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