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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> | |
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22 | #include <asm/mach/pci.h> |
23 | #include <asm/mach-types.h> | |
24 | ||
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25 | #define MAX_DEV 3 |
26 | #define IRQ_LINES 3 | |
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27 | |
28 | /* PCI controller GPIO to IRQ pin mappings */ | |
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29 | #define INTA 6 |
30 | #define INTB 7 | |
31 | #define INTC 5 | |
914e7bc2 | 32 | |
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33 | void __init fsg_pci_preinit(void) |
34 | { | |
6845664a TG |
35 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); |
36 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); | |
37 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); | |
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38 | ixp4xx_pci_preinit(); |
39 | } | |
40 | ||
41 | static int __init fsg_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
42 | { | |
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43 | static int pci_irq_table[IRQ_LINES] = { |
44 | IXP4XX_GPIO_IRQ(INTC), | |
45 | IXP4XX_GPIO_IRQ(INTB), | |
46 | IXP4XX_GPIO_IRQ(INTA), | |
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47 | }; |
48 | ||
49 | int irq = -1; | |
8d3fdf31 | 50 | slot -= 11; |
7e36e2f5 | 51 | |
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52 | if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) |
53 | irq = pci_irq_table[slot - 1]; | |
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54 | printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n", |
55 | __func__, slot, pin, irq); | |
56 | ||
57 | return irq; | |
58 | } | |
59 | ||
60 | struct hw_pci fsg_pci __initdata = { | |
61 | .nr_controllers = 1, | |
62 | .preinit = fsg_pci_preinit, | |
63 | .swizzle = pci_std_swizzle, | |
64 | .setup = ixp4xx_setup, | |
65 | .scan = ixp4xx_scan_bus, | |
66 | .map_irq = fsg_map_irq, | |
67 | }; | |
68 | ||
69 | int __init fsg_pci_init(void) | |
70 | { | |
71 | if (machine_is_fsg()) | |
72 | pci_common_init(&fsg_pci); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | subsys_initcall(fsg_pci_init); |