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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Krzysztof Hałasa9bf4d672009-11-16 15:24:41 +01002 * arch/arm/mach-ixp4xx/ixdp425-pci.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/pci.h>
19#include <linux/init.h>
Thomas Gleixner698dfe22006-07-01 23:01:49 +010020#include <linux/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <asm/mach/pci.h>
23#include <asm/irq.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010024#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <asm/mach-types.h>
26
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010027#define MAX_DEV 4
28#define IRQ_LINES 4
Krzysztof Hałasa9bf4d672009-11-16 15:24:41 +010029
30/* PCI controller GPIO to IRQ pin mappings */
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010031#define INTA 11
32#define INTB 10
33#define INTC 9
34#define INTD 8
Krzysztof Hałasa9bf4d672009-11-16 15:24:41 +010035
Krzysztof Hałasa9bf4d672009-11-16 15:24:41 +010036
Linus Torvalds1da177e2005-04-16 15:20:36 -070037void __init ixdp425_pci_preinit(void)
38{
Thomas Gleixner6845664a2011-03-24 13:25:22 +010039 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
40 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
41 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
42 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 ixp4xx_pci_preinit();
44}
45
Ralf Baechled5341942011-06-10 15:30:21 +010046static int __init ixdp425_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047{
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010048 static int pci_irq_table[IRQ_LINES] = {
49 IXP4XX_GPIO_IRQ(INTA),
50 IXP4XX_GPIO_IRQ(INTB),
51 IXP4XX_GPIO_IRQ(INTC),
52 IXP4XX_GPIO_IRQ(INTD)
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 };
54
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010055 if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
56 return pci_irq_table[(slot + pin - 2) % 4];
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010058 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070059}
60
61struct hw_pci ixdp425_pci __initdata = {
62 .nr_controllers = 1,
63 .preinit = ixdp425_pci_preinit,
64 .swizzle = pci_std_swizzle,
65 .setup = ixp4xx_setup,
66 .scan = ixp4xx_scan_bus,
67 .map_irq = ixdp425_map_irq,
68};
69
70int __init ixdp425_pci_init(void)
71{
72 if (machine_is_ixdp425() || machine_is_ixcdp1100() ||
Ruslan V. Sushko45fba082007-04-06 15:00:31 +010073 machine_is_ixdp465() || machine_is_kixrp435())
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 pci_common_init(&ixdp425_pci);
75 return 0;
76}
77
78subsys_initcall(ixdp425_pci_init);