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1 | /* | |
2 | * arch/arm/mach-ixp4xx/nas100d-pci.c | |
3 | * | |
4 | * NAS 100d board-level PCI initialization | |
5 | * | |
6 | * based on ixdp425-pci.c: | |
7 | * Copyright (C) 2002 Intel Corporation. | |
8 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
9 | * | |
10 | * Maintainer: http://www.nslu2-linux.org/ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/pci.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/irq.h> | |
21 | #include <asm/mach/pci.h> | |
22 | #include <asm/mach-types.h> | |
23 | ||
24 | #define MAX_DEV 3 | |
25 | #define IRQ_LINES 3 | |
26 | ||
27 | /* PCI controller GPIO to IRQ pin mappings */ | |
28 | #define INTA 11 | |
29 | #define INTB 10 | |
30 | #define INTC 9 | |
31 | #define INTD 8 | |
32 | #define INTE 7 | |
33 | ||
34 | void __init nas100d_pci_preinit(void) | |
35 | { | |
36 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); | |
37 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); | |
38 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); | |
39 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); | |
40 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW); | |
41 | ixp4xx_pci_preinit(); | |
42 | } | |
43 | ||
44 | static int __init nas100d_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) | |
45 | { | |
46 | static int pci_irq_table[MAX_DEV][IRQ_LINES] = { | |
47 | { IXP4XX_GPIO_IRQ(INTA), -1, -1 }, | |
48 | { IXP4XX_GPIO_IRQ(INTB), -1, -1 }, | |
49 | { IXP4XX_GPIO_IRQ(INTC), IXP4XX_GPIO_IRQ(INTD), | |
50 | IXP4XX_GPIO_IRQ(INTE) }, | |
51 | }; | |
52 | ||
53 | if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) | |
54 | return pci_irq_table[slot - 1][pin - 1]; | |
55 | ||
56 | return -1; | |
57 | } | |
58 | ||
59 | struct hw_pci __initdata nas100d_pci = { | |
60 | .nr_controllers = 1, | |
61 | .ops = &ixp4xx_ops, | |
62 | .preinit = nas100d_pci_preinit, | |
63 | .setup = ixp4xx_setup, | |
64 | .map_irq = nas100d_map_irq, | |
65 | }; | |
66 | ||
67 | int __init nas100d_pci_init(void) | |
68 | { | |
69 | if (machine_is_nas100d()) | |
70 | pci_common_init(&nas100d_pci); | |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
75 | subsys_initcall(nas100d_pci_init); |