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1da177e4 LT |
1 | /* |
2 | * arch/arm/mach-ixp4xx/ixdp425-pci.c | |
3 | * | |
4 | * IXDP425 board-level PCI initialization | |
5 | * | |
6 | * Copyright (C) 2002 Intel Corporation. | |
7 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
8 | * | |
9 | * Maintainer: Deepak Saxena <dsaxena@plexity.net> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
1da177e4 LT |
18 | #include <linux/pci.h> |
19 | #include <linux/init.h> | |
698dfe2b | 20 | #include <linux/irq.h> |
1da177e4 LT |
21 | #include <linux/delay.h> |
22 | ||
23 | #include <asm/mach/pci.h> | |
24 | #include <asm/irq.h> | |
25 | #include <asm/hardware.h> | |
26 | #include <asm/mach-types.h> | |
27 | ||
28 | void __init ixdp425_pci_preinit(void) | |
29 | { | |
6cab4860 DB |
30 | set_irq_type(IRQ_IXDP425_PCI_INTA, IRQ_TYPE_LEVEL_LOW); |
31 | set_irq_type(IRQ_IXDP425_PCI_INTB, IRQ_TYPE_LEVEL_LOW); | |
32 | set_irq_type(IRQ_IXDP425_PCI_INTC, IRQ_TYPE_LEVEL_LOW); | |
33 | set_irq_type(IRQ_IXDP425_PCI_INTD, IRQ_TYPE_LEVEL_LOW); | |
1da177e4 | 34 | |
1da177e4 LT |
35 | ixp4xx_pci_preinit(); |
36 | } | |
37 | ||
38 | static int __init ixdp425_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
39 | { | |
40 | static int pci_irq_table[IXDP425_PCI_IRQ_LINES] = { | |
41 | IRQ_IXDP425_PCI_INTA, | |
42 | IRQ_IXDP425_PCI_INTB, | |
43 | IRQ_IXDP425_PCI_INTC, | |
44 | IRQ_IXDP425_PCI_INTD | |
45 | }; | |
46 | ||
47 | int irq = -1; | |
48 | ||
49 | if (slot >= 1 && slot <= IXDP425_PCI_MAX_DEV && | |
50 | pin >= 1 && pin <= IXDP425_PCI_IRQ_LINES) { | |
51 | irq = pci_irq_table[(slot + pin - 2) % 4]; | |
52 | } | |
53 | ||
54 | return irq; | |
55 | } | |
56 | ||
57 | struct hw_pci ixdp425_pci __initdata = { | |
58 | .nr_controllers = 1, | |
59 | .preinit = ixdp425_pci_preinit, | |
60 | .swizzle = pci_std_swizzle, | |
61 | .setup = ixp4xx_setup, | |
62 | .scan = ixp4xx_scan_bus, | |
63 | .map_irq = ixdp425_map_irq, | |
64 | }; | |
65 | ||
66 | int __init ixdp425_pci_init(void) | |
67 | { | |
68 | if (machine_is_ixdp425() || machine_is_ixcdp1100() || | |
45fba084 | 69 | machine_is_ixdp465() || machine_is_kixrp435()) |
1da177e4 LT |
70 | pci_common_init(&ixdp425_pci); |
71 | return 0; | |
72 | } | |
73 | ||
74 | subsys_initcall(ixdp425_pci_init); | |
75 |