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Commit | Line | Data |
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1da177e4 LT |
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); |