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1 | /* |
2 | * arch/arch/mach-ixp4xx/fsg-pci.c | |
3 | * | |
4 | * FSG board-level PCI initialization | |
5 | * | |
6 | * Author: Rod Whitby <rod@whitby.id.au> | |
7 | * Maintainer: http://www.nslu2-linux.org/ | |
8 | * | |
9 | * based on ixdp425-pci.c: | |
10 | * Copyright (C) 2002 Intel Corporation. | |
11 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | * | |
17 | */ | |
18 | ||
19 | #include <linux/pci.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/irq.h> | |
22 | ||
23 | #include <asm/mach/pci.h> | |
24 | #include <asm/mach-types.h> | |
25 | ||
26 | void __init fsg_pci_preinit(void) | |
27 | { | |
6cab4860 DB |
28 | set_irq_type(IRQ_FSG_PCI_INTA, IRQ_TYPE_LEVEL_LOW); |
29 | set_irq_type(IRQ_FSG_PCI_INTB, IRQ_TYPE_LEVEL_LOW); | |
30 | set_irq_type(IRQ_FSG_PCI_INTC, IRQ_TYPE_LEVEL_LOW); | |
7e36e2f5 RW |
31 | |
32 | ixp4xx_pci_preinit(); | |
33 | } | |
34 | ||
35 | static int __init fsg_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
36 | { | |
37 | static int pci_irq_table[FSG_PCI_IRQ_LINES] = { | |
38 | IRQ_FSG_PCI_INTC, | |
39 | IRQ_FSG_PCI_INTB, | |
40 | IRQ_FSG_PCI_INTA, | |
41 | }; | |
42 | ||
43 | int irq = -1; | |
44 | slot = slot - 11; | |
45 | ||
46 | if (slot >= 1 && slot <= FSG_PCI_MAX_DEV && | |
47 | pin >= 1 && pin <= FSG_PCI_IRQ_LINES) | |
48 | irq = pci_irq_table[(slot - 1)]; | |
49 | printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n", | |
50 | __func__, slot, pin, irq); | |
51 | ||
52 | return irq; | |
53 | } | |
54 | ||
55 | struct hw_pci fsg_pci __initdata = { | |
56 | .nr_controllers = 1, | |
57 | .preinit = fsg_pci_preinit, | |
58 | .swizzle = pci_std_swizzle, | |
59 | .setup = ixp4xx_setup, | |
60 | .scan = ixp4xx_scan_bus, | |
61 | .map_irq = fsg_map_irq, | |
62 | }; | |
63 | ||
64 | int __init fsg_pci_init(void) | |
65 | { | |
66 | if (machine_is_fsg()) | |
67 | pci_common_init(&fsg_pci); | |
68 | return 0; | |
69 | } | |
70 | ||
71 | subsys_initcall(fsg_pci_init); |