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/pci.h>
19#include <linux/init.h>
20#include <linux/irq.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
28void __init ixdp425_pci_preinit(void)
29{
30	set_irq_type(IRQ_IXDP425_PCI_INTA, IRQT_LOW);
31	set_irq_type(IRQ_IXDP425_PCI_INTB, IRQT_LOW);
32	set_irq_type(IRQ_IXDP425_PCI_INTC, IRQT_LOW);
33	set_irq_type(IRQ_IXDP425_PCI_INTD, IRQT_LOW);
34
35	ixp4xx_pci_preinit();
36}
37
38static int __init ixdp425_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
39{
40	static int pci_irq_table[IXDP425_PCI_IRQ_LINES] = {
41		IRQ_IXDP425_PCI_INTA,
42		IRQ_IXDP425_PCI_INTB,
43		IRQ_IXDP425_PCI_INTC,
44		IRQ_IXDP425_PCI_INTD
45	};
46
47	int irq = -1;
48
49	if (slot >= 1 && slot <= IXDP425_PCI_MAX_DEV &&
50		pin >= 1 && pin <= IXDP425_PCI_IRQ_LINES) {
51		irq = pci_irq_table[(slot + pin - 2) % 4];
52	}
53
54	return irq;
55}
56
57struct hw_pci ixdp425_pci __initdata = {
58	.nr_controllers = 1,
59	.preinit	= ixdp425_pci_preinit,
60	.swizzle	= pci_std_swizzle,
61	.setup		= ixp4xx_setup,
62	.scan		= ixp4xx_scan_bus,
63	.map_irq	= ixdp425_map_irq,
64};
65
66int __init ixdp425_pci_init(void)
67{
68	if (machine_is_ixdp425() || machine_is_ixcdp1100() ||
69			machine_is_ixdp465() || machine_is_kixrp435())
70		pci_common_init(&ixdp425_pci);
71	return 0;
72}
73
74subsys_initcall(ixdp425_pci_init);
75