Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel...
[sfrench/cifs-2.6.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 u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin)
20 {
21         return 0;
22 }
23
24 static 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  */
46 static 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
56 static int __init cats_pci_init(void)
57 {
58         if (machine_is_cats())
59                 pci_common_init(&cats_pci);
60         return 0;
61 }
62
63 subsys_initcall(cats_pci_init);