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Michael-Luke Jones28bd3a02007-04-28 08:31:40 +01001/*
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>
Michael-Luke Jones28bd3a02007-04-28 08:31:40 +010022#include <asm/mach/pci.h>
23#include <asm/mach-types.h>
24
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010025#define MAX_DEV 4
26#define IRQ_LINES 3
Krzysztof Hałasa395e7122009-11-16 21:56:56 +010027
28/* PCI controller GPIO to IRQ pin mappings */
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010029#define INTA 11
30#define INTB 10
31#define INTC 9
32#define INTD 8
33#define INTE 7
34#define INTF 6
Krzysztof Hałasa395e7122009-11-16 21:56:56 +010035
Michael-Luke Jones28bd3a02007-04-28 08:31:40 +010036void __init dsmg600_pci_preinit(void)
37{
Thomas Gleixner6845664a2011-03-24 13:25:22 +010038 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);
Michael-Luke Jones28bd3a02007-04-28 08:31:40 +010044 ixp4xx_pci_preinit();
45}
46
Ralf Baechled5341942011-06-10 15:30:21 +010047static int __init dsmg600_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
Michael-Luke Jones28bd3a02007-04-28 08:31:40 +010048{
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010049 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 },
Michael-Luke Jones28bd3a02007-04-28 08:31:40 +010055 };
56
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010057 if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
58 return pci_irq_table[slot - 1][pin - 1];
Michael-Luke Jones28bd3a02007-04-28 08:31:40 +010059
Krzysztof Hałasa8d3fdf32009-11-17 18:48:23 +010060 return -1;
Michael-Luke Jones28bd3a02007-04-28 08:31:40 +010061}
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);