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28bd3a0d MLJ |
1 | /* |
2 | * DSM-G600 board-level PCI initialization | |
3 | * | |
4 | * Copyright (C) 2006 Tower Technologies | |
5 | * Author: Alessandro Zummo <a.zummo@towertech.it> | |
6 | * | |
7 | * based on ixdp425-pci.c: | |
8 | * Copyright (C) 2002 Intel Corporation. | |
9 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
10 | * | |
11 | * Maintainer: http://www.nslu2-linux.org/ | |
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> | |
28bd3a0d MLJ |
22 | #include <asm/mach/pci.h> |
23 | #include <asm/mach-types.h> | |
24 | ||
8d3fdf31 KH |
25 | #define MAX_DEV 4 |
26 | #define IRQ_LINES 3 | |
395e7127 KH |
27 | |
28 | /* PCI controller GPIO to IRQ pin mappings */ | |
8d3fdf31 KH |
29 | #define INTA 11 |
30 | #define INTB 10 | |
31 | #define INTC 9 | |
32 | #define INTD 8 | |
33 | #define INTE 7 | |
34 | #define INTF 6 | |
395e7127 | 35 | |
28bd3a0d MLJ |
36 | void __init dsmg600_pci_preinit(void) |
37 | { | |
6845664a TG |
38 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); |
39 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); | |
40 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); | |
41 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); | |
42 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW); | |
43 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTF), IRQ_TYPE_LEVEL_LOW); | |
28bd3a0d MLJ |
44 | ixp4xx_pci_preinit(); |
45 | } | |
46 | ||
47 | static int __init dsmg600_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
48 | { | |
8d3fdf31 KH |
49 | static int pci_irq_table[MAX_DEV][IRQ_LINES] = { |
50 | { IXP4XX_GPIO_IRQ(INTE), -1, -1 }, | |
51 | { IXP4XX_GPIO_IRQ(INTA), -1, -1 }, | |
52 | { IXP4XX_GPIO_IRQ(INTB), IXP4XX_GPIO_IRQ(INTC), | |
53 | IXP4XX_GPIO_IRQ(INTD) }, | |
54 | { IXP4XX_GPIO_IRQ(INTF), -1, -1 }, | |
28bd3a0d MLJ |
55 | }; |
56 | ||
8d3fdf31 KH |
57 | if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) |
58 | return pci_irq_table[slot - 1][pin - 1]; | |
28bd3a0d | 59 | |
8d3fdf31 | 60 | return -1; |
28bd3a0d MLJ |
61 | } |
62 | ||
63 | struct hw_pci __initdata dsmg600_pci = { | |
64 | .nr_controllers = 1, | |
65 | .preinit = dsmg600_pci_preinit, | |
66 | .swizzle = pci_std_swizzle, | |
67 | .setup = ixp4xx_setup, | |
68 | .scan = ixp4xx_scan_bus, | |
69 | .map_irq = dsmg600_map_irq, | |
70 | }; | |
71 | ||
72 | int __init dsmg600_pci_init(void) | |
73 | { | |
74 | if (machine_is_dsmg600()) | |
75 | pci_common_init(&dsmg600_pci); | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | subsys_initcall(dsmg600_pci_init); |