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>
22#include <asm/mach/pci.h>
23#include <asm/mach-types.h>
24
25#define MAX_DEV		4
26#define IRQ_LINES	3
27
28/* PCI controller GPIO to IRQ pin mappings */
29#define INTA		11
30#define INTB		10
31#define INTC		9
32#define INTD		8
33#define INTE		7
34#define INTF		6
35
36void __init dsmg600_pci_preinit(void)
37{
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);
44	ixp4xx_pci_preinit();
45}
46
47static int __init dsmg600_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
48{
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 },
55	};
56
57	if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
58		return pci_irq_table[slot - 1][pin - 1];
59
60	return -1;
61}
62
63struct 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
72int __init dsmg600_pci_init(void)
73{
74	if (machine_is_dsmg600())
75		pci_common_init(&dsmg600_pci);
76
77	return 0;
78}
79
80subsys_initcall(dsmg600_pci_init);
81