ARM: footbridge: convert to clockevents/clocksource
[linux-3.10.git] / arch / arm / mach-footbridge / cats-pci.c
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 >= 255)
22                 return -1;      /* not a valid interrupt. */
23
24         if (dev->irq >= 128)
25                 return dev->irq & 0x1f;
26
27         if (dev->irq >= 1 && dev->irq <= 4)
28                 return irqmap_cats[dev->irq - 1];
29
30         if (dev->irq != 0)
31                 printk("PCI: device %02x:%02x has unknown irq line %x\n",
32                        dev->bus->number, dev->devfn, dev->irq);
33
34         return -1;
35 }
36
37 /*
38  * why not the standard PCI swizzle?  does this prevent 4-port tulip
39  * cards being used (ie, pci-pci bridge based cards)?
40  */
41 static struct hw_pci cats_pci __initdata = {
42         .swizzle                = NULL,
43         .map_irq                = cats_map_irq,
44         .nr_controllers         = 1,
45         .setup                  = dc21285_setup,
46         .scan                   = dc21285_scan_bus,
47         .preinit                = dc21285_preinit,
48         .postinit               = dc21285_postinit,
49 };
50
51 static int __init cats_pci_init(void)
52 {
53         if (machine_is_cats())
54                 pci_common_init(&cats_pci);
55         return 0;
56 }
57
58 subsys_initcall(cats_pci_init);