Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-2.6] / arch / arm / mach-footbridge / personal-pci.c
1 /*
2  * linux/arch/arm/mach-footbridge/personal-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 static int irqmap_personal_server[] __initdata = {
17         IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
18         IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
19 };
20
21 static int __init personal_server_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
22 {
23         unsigned char line;
24
25         pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
26
27         if (line > 0x40 && line <= 0x5f) {
28                 /* line corresponds to the bit controlling this interrupt
29                  * in the footbridge.  Ignore the first 8 interrupt bits,
30                  * look up the rest in the map.  IN0 is bit number 8
31                  */
32                 return irqmap_personal_server[(line & 0x1f) - 8];
33         } else if (line == 0) {
34                 /* no interrupt */
35                 return 0;
36         } else
37                 return irqmap_personal_server[(line - 1) & 3];
38 }
39
40 static struct hw_pci personal_server_pci __initdata = {
41         .map_irq                = personal_server_map_irq,
42         .nr_controllers         = 1,
43         .setup                  = dc21285_setup,
44         .scan                   = dc21285_scan_bus,
45         .preinit                = dc21285_preinit,
46         .postinit               = dc21285_postinit,
47 };
48
49 static int __init personal_pci_init(void)
50 {
51         if (machine_is_personal_server())
52                 pci_common_init(&personal_server_pci);
53         return 0;
54 }
55
56 subsys_initcall(personal_pci_init);