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
38void __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
47static 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
62struct hw_pci miccpt_pci __initdata = {
63	.nr_controllers = 1,
64	.ops		= &ixp4xx_ops,
65	.preinit	= miccpt_pci_preinit,
66	.setup		= ixp4xx_setup,
67	.map_irq	= miccpt_map_irq,
68};
69
70int __init miccpt_pci_init(void)
71{
72	if (machine_is_miccpt())
73		pci_common_init(&miccpt_pci);
74	return 0;
75}
76
77subsys_initcall(miccpt_pci_init);
78