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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> | |
18 | #include <linux/config.h> | |
19 | #include <linux/pci.h> | |
20 | #include <linux/init.h> | |
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 | { | |
30 | gpio_line_config(IXDP425_PCI_INTA_PIN, | |
31 | IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW); | |
32 | gpio_line_config(IXDP425_PCI_INTB_PIN, | |
33 | IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW); | |
34 | gpio_line_config(IXDP425_PCI_INTC_PIN, | |
35 | IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW); | |
36 | gpio_line_config(IXDP425_PCI_INTD_PIN, | |
37 | IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW); | |
38 | ||
39 | gpio_line_isr_clear(IXDP425_PCI_INTA_PIN); | |
40 | gpio_line_isr_clear(IXDP425_PCI_INTB_PIN); | |
41 | gpio_line_isr_clear(IXDP425_PCI_INTC_PIN); | |
42 | gpio_line_isr_clear(IXDP425_PCI_INTD_PIN); | |
43 | ||
44 | ixp4xx_pci_preinit(); | |
45 | } | |
46 | ||
47 | static int __init ixdp425_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
48 | { | |
49 | static int pci_irq_table[IXDP425_PCI_IRQ_LINES] = { | |
50 | IRQ_IXDP425_PCI_INTA, | |
51 | IRQ_IXDP425_PCI_INTB, | |
52 | IRQ_IXDP425_PCI_INTC, | |
53 | IRQ_IXDP425_PCI_INTD | |
54 | }; | |
55 | ||
56 | int irq = -1; | |
57 | ||
58 | if (slot >= 1 && slot <= IXDP425_PCI_MAX_DEV && | |
59 | pin >= 1 && pin <= IXDP425_PCI_IRQ_LINES) { | |
60 | irq = pci_irq_table[(slot + pin - 2) % 4]; | |
61 | } | |
62 | ||
63 | return irq; | |
64 | } | |
65 | ||
66 | struct hw_pci ixdp425_pci __initdata = { | |
67 | .nr_controllers = 1, | |
68 | .preinit = ixdp425_pci_preinit, | |
69 | .swizzle = pci_std_swizzle, | |
70 | .setup = ixp4xx_setup, | |
71 | .scan = ixp4xx_scan_bus, | |
72 | .map_irq = ixdp425_map_irq, | |
73 | }; | |
74 | ||
75 | int __init ixdp425_pci_init(void) | |
76 | { | |
77 | if (machine_is_ixdp425() || machine_is_ixcdp1100() || | |
78 | machine_is_avila() || machine_is_ixdp465()) | |
79 | pci_common_init(&ixdp425_pci); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | subsys_initcall(ixdp425_pci_init); | |
84 |