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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>
Michael-Luke Jones0f185972006-12-16 23:04:05 +010025#include <asm/mach/pci.h>
26#include <asm/irq.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010027#include <mach/hardware.h>
Michael-Luke Jones0f185972006-12-16 23:04:05 +010028#include <asm/mach-types.h>
29
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010030#define AVILA_MAX_DEV 4
31#define LOFT_MAX_DEV 6
32#define IRQ_LINES 4
Krzysztof Hałasaec669692009-11-16 15:39:11 +010033
34/* PCI controller GPIO to IRQ pin mappings */
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010035#define INTA 11
36#define INTB 10
37#define INTC 9
38#define INTD 8
Krzysztof Hałasaec669692009-11-16 15:39:11 +010039
Michael-Luke Jones0f185972006-12-16 23:04:05 +010040void __init avila_pci_preinit(void)
41{
Thomas Gleixner6845664a2011-03-24 13:25:22 +010042 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
43 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
44 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
45 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
Michael-Luke Jones0f185972006-12-16 23:04:05 +010046 ixp4xx_pci_preinit();
47}
48
Ralf Baechled5341942011-06-10 15:30:21 +010049static int __init avila_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
Michael-Luke Jones0f185972006-12-16 23:04:05 +010050{
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010051 static int pci_irq_table[IRQ_LINES] = {
52 IXP4XX_GPIO_IRQ(INTA),
53 IXP4XX_GPIO_IRQ(INTB),
54 IXP4XX_GPIO_IRQ(INTC),
55 IXP4XX_GPIO_IRQ(INTD)
Michael-Luke Jones0f185972006-12-16 23:04:05 +010056 };
57
Michael-Luke Jones0f185972006-12-16 23:04:05 +010058 if (slot >= 1 &&
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010059 slot <= (machine_is_loft() ? LOFT_MAX_DEV : AVILA_MAX_DEV) &&
60 pin >= 1 && pin <= IRQ_LINES)
61 return pci_irq_table[(slot + pin - 2) % 4];
Michael-Luke Jones0f185972006-12-16 23:04:05 +010062
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010063 return -1;
Michael-Luke Jones0f185972006-12-16 23:04:05 +010064}
65
66struct hw_pci avila_pci __initdata = {
67 .nr_controllers = 1,
68 .preinit = avila_pci_preinit,
69 .swizzle = pci_std_swizzle,
70 .setup = ixp4xx_setup,
71 .scan = ixp4xx_scan_bus,
72 .map_irq = avila_map_irq,
73};
74
75int __init avila_pci_init(void)
76{
77 if (machine_is_avila() || machine_is_loft())
78 pci_common_init(&avila_pci);
79 return 0;
80}
81
82subsys_initcall(avila_pci_init);