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Michael-Luke Jones0f185972006-12-16 23:04:05 +01001/*
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>
Russell Kinga09e64f2008-08-05 16:14:15 +010028#include <mach/hardware.h>
Michael-Luke Jones0f185972006-12-16 23:04:05 +010029#include <asm/mach-types.h>
30
31void __init avila_pci_preinit(void)
32{
Dmitry Baryshkov6cab4862008-07-27 04:23:31 +010033 set_irq_type(IRQ_AVILA_PCI_INTA, IRQ_TYPE_LEVEL_LOW);
34 set_irq_type(IRQ_AVILA_PCI_INTB, IRQ_TYPE_LEVEL_LOW);
35 set_irq_type(IRQ_AVILA_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
36 set_irq_type(IRQ_AVILA_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
Michael-Luke Jones0f185972006-12-16 23:04:05 +010037
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