/arch/arm/mach-ixp4xx/nas100d-pci.c
C | 76 lines | 48 code | 11 blank | 17 comment | 5 complexity | c2874653b5cd9f9846c67bec6c0ea198 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
1/*
2 * arch/arm/mach-ixp4xx/nas100d-pci.c
3 *
4 * NAS 100d board-level PCI initialization
5 *
6 * based on ixdp425-pci.c:
7 * Copyright (C) 2002 Intel Corporation.
8 * Copyright (C) 2003-2004 MontaVista Software, Inc.
9 *
10 * Maintainer: http://www.nslu2-linux.org/
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 *
16 */
17
18#include <linux/pci.h>
19#include <linux/init.h>
20#include <linux/irq.h>
21#include <asm/mach/pci.h>
22#include <asm/mach-types.h>
23
24#define MAX_DEV 3
25#define IRQ_LINES 3
26
27/* PCI controller GPIO to IRQ pin mappings */
28#define INTA 11
29#define INTB 10
30#define INTC 9
31#define INTD 8
32#define INTE 7
33
34void __init nas100d_pci_preinit(void)
35{
36 set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
37 set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
38 set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
39 set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
40 set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
41 ixp4xx_pci_preinit();
42}
43
44static int __init nas100d_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
45{
46 static int pci_irq_table[MAX_DEV][IRQ_LINES] = {
47 { IXP4XX_GPIO_IRQ(INTA), -1, -1 },
48 { IXP4XX_GPIO_IRQ(INTB), -1, -1 },
49 { IXP4XX_GPIO_IRQ(INTC), IXP4XX_GPIO_IRQ(INTD),
50 IXP4XX_GPIO_IRQ(INTE) },
51 };
52
53 if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
54 return pci_irq_table[slot - 1][pin - 1];
55
56 return -1;
57}
58
59struct hw_pci __initdata nas100d_pci = {
60 .nr_controllers = 1,
61 .preinit = nas100d_pci_preinit,
62 .swizzle = pci_std_swizzle,
63 .setup = ixp4xx_setup,
64 .scan = ixp4xx_scan_bus,
65 .map_irq = nas100d_map_irq,
66};
67
68int __init nas100d_pci_init(void)
69{
70 if (machine_is_nas100d())
71 pci_common_init(&nas100d_pci);
72
73 return 0;
74}
75
76subsys_initcall(nas100d_pci_init);