1/*
2 * arch/arm/mach-ixp4xx/avila-pci.c
3 *
4 * Gateworks Avila board-level PCI initialization
5 *
6 * Author: Michael-Luke Jones <mlj28@cam.ac.uk>
7 *
8 * Based on ixdp-pci.c
9 * Copyright (C) 2002 Intel Corporation.
10 * Copyright (C) 2003-2004 MontaVista Software, Inc.
11 *
12 * Maintainer: Deepak Saxena <dsaxena@plexity.net>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 */
19
20#include <linux/kernel.h>
21#include <linux/pci.h>
22#include <linux/init.h>
23#include <linux/irq.h>
24#include <linux/delay.h>
25
26#include <asm/mach/pci.h>
27#include <asm/irq.h>
28#include <asm/hardware.h>
29#include <asm/mach-types.h>
30
31void __init avila_pci_preinit(void)
32{
33	set_irq_type(IRQ_AVILA_PCI_INTA, IRQT_LOW);
34	set_irq_type(IRQ_AVILA_PCI_INTB, IRQT_LOW);
35	set_irq_type(IRQ_AVILA_PCI_INTC, IRQT_LOW);
36	set_irq_type(IRQ_AVILA_PCI_INTD, IRQT_LOW);
37
38	ixp4xx_pci_preinit();
39}
40
41static int __init avila_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
42{
43	static int pci_irq_table[AVILA_PCI_IRQ_LINES] = {
44		IRQ_AVILA_PCI_INTA,
45		IRQ_AVILA_PCI_INTB,
46		IRQ_AVILA_PCI_INTC,
47		IRQ_AVILA_PCI_INTD
48	};
49
50	int irq = -1;
51
52	if (slot >= 1 &&
53	slot <= (machine_is_loft() ? LOFT_PCI_MAX_DEV : AVILA_PCI_MAX_DEV) &&
54		pin >= 1 && pin <= AVILA_PCI_IRQ_LINES) {
55		irq = pci_irq_table[(slot + pin - 2) % 4];
56	}
57
58	return irq;
59}
60
61struct hw_pci avila_pci __initdata = {
62	.nr_controllers = 1,
63	.preinit	= avila_pci_preinit,
64	.swizzle	= pci_std_swizzle,
65	.setup		= ixp4xx_setup,
66	.scan		= ixp4xx_scan_bus,
67	.map_irq	= avila_map_irq,
68};
69
70int __init avila_pci_init(void)
71{
72	if (machine_is_avila() || machine_is_loft())
73		pci_common_init(&avila_pci);
74	return 0;
75}
76
77subsys_initcall(avila_pci_init);
78