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a7918f39 AZ |
1 | /* |
2 | * arch/arm/mach-ixp4xx/nslu2-pci.c | |
3 | * | |
4 | * NSLU2 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 | ||
a7918f39 AZ |
18 | #include <linux/pci.h> |
19 | #include <linux/init.h> | |
f64c2c01 | 20 | #include <linux/irq.h> |
a7918f39 AZ |
21 | |
22 | #include <asm/mach/pci.h> | |
23 | #include <asm/mach-types.h> | |
24 | ||
25 | void __init nslu2_pci_preinit(void) | |
26 | { | |
27 | set_irq_type(IRQ_NSLU2_PCI_INTA, IRQT_LOW); | |
28 | set_irq_type(IRQ_NSLU2_PCI_INTB, IRQT_LOW); | |
29 | set_irq_type(IRQ_NSLU2_PCI_INTC, IRQT_LOW); | |
30 | ||
a7918f39 AZ |
31 | ixp4xx_pci_preinit(); |
32 | } | |
33 | ||
34 | static int __init nslu2_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
35 | { | |
36 | static int pci_irq_table[NSLU2_PCI_IRQ_LINES] = { | |
37 | IRQ_NSLU2_PCI_INTA, | |
38 | IRQ_NSLU2_PCI_INTB, | |
39 | IRQ_NSLU2_PCI_INTC, | |
40 | }; | |
41 | ||
42 | int irq = -1; | |
43 | ||
44 | if (slot >= 1 && slot <= NSLU2_PCI_MAX_DEV && | |
45 | pin >= 1 && pin <= NSLU2_PCI_IRQ_LINES) { | |
46 | irq = pci_irq_table[(slot + pin - 2) % NSLU2_PCI_IRQ_LINES]; | |
47 | } | |
48 | ||
49 | return irq; | |
50 | } | |
51 | ||
52 | struct hw_pci __initdata nslu2_pci = { | |
53 | .nr_controllers = 1, | |
54 | .preinit = nslu2_pci_preinit, | |
55 | .swizzle = pci_std_swizzle, | |
56 | .setup = ixp4xx_setup, | |
57 | .scan = ixp4xx_scan_bus, | |
58 | .map_irq = nslu2_map_irq, | |
59 | }; | |
60 | ||
61 | int __init nslu2_pci_init(void) /* monkey see, monkey do */ | |
62 | { | |
63 | if (machine_is_nslu2()) | |
64 | pci_common_init(&nslu2_pci); | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | subsys_initcall(nslu2_pci_init); |