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2b8f0119 RC |
1 | /* |
2 | * arch/arm/mach-ixp4xx/miccpt-pci.c | |
3 | * | |
4 | * MICCPT board-level PCI initialization | |
5 | * | |
6 | * Copyright (C) 2002 Intel Corporation. | |
7 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
8 | * Copyright (C) 2006 OMICRON electronics GmbH | |
9 | * | |
10 | * Author: Michael Jochum <michael.jochum@omicron.at> | |
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 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/pci.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/irq.h> | |
23 | #include <asm/mach/pci.h> | |
24 | #include <asm/irq.h> | |
25 | #include <mach/hardware.h> | |
26 | #include <asm/mach-types.h> | |
27 | ||
28 | #define MAX_DEV 4 | |
29 | #define IRQ_LINES 4 | |
30 | ||
31 | /* PCI controller GPIO to IRQ pin mappings */ | |
32 | #define INTA 1 | |
33 | #define INTB 2 | |
34 | #define INTC 3 | |
35 | #define INTD 4 | |
36 | ||
37 | ||
38 | void __init miccpt_pci_preinit(void) | |
39 | { | |
40 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); | |
41 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); | |
42 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); | |
43 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); | |
44 | ixp4xx_pci_preinit(); | |
45 | } | |
46 | ||
47 | static int __init miccpt_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) | |
48 | { | |
49 | static int pci_irq_table[IRQ_LINES] = { | |
50 | IXP4XX_GPIO_IRQ(INTA), | |
51 | IXP4XX_GPIO_IRQ(INTB), | |
52 | IXP4XX_GPIO_IRQ(INTC), | |
53 | IXP4XX_GPIO_IRQ(INTD) | |
54 | }; | |
55 | ||
56 | if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) | |
57 | return pci_irq_table[(slot + pin - 2) % 4]; | |
58 | ||
59 | return -1; | |
60 | } | |
61 | ||
62 | struct hw_pci miccpt_pci __initdata = { | |
63 | .nr_controllers = 1, | |
c23bfc38 | 64 | .ops = &ixp4xx_ops, |
2b8f0119 | 65 | .preinit = miccpt_pci_preinit, |
2b8f0119 | 66 | .setup = ixp4xx_setup, |
2b8f0119 RC |
67 | .map_irq = miccpt_map_irq, |
68 | }; | |
69 | ||
70 | int __init miccpt_pci_init(void) | |
71 | { | |
72 | if (machine_is_miccpt()) | |
73 | pci_common_init(&miccpt_pci); | |
74 | return 0; | |
75 | } | |
76 | ||
77 | subsys_initcall(miccpt_pci_init); |