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
nas100d_pci_preinit(void)34 void __init nas100d_pci_preinit(void)
35 {
36 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
37 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
38 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
39 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
40 irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
41 ixp4xx_pci_preinit();
42 }
43
nas100d_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)44 static int __init nas100d_map_irq(const 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
59 struct hw_pci __initdata nas100d_pci = {
60 .nr_controllers = 1,
61 .ops = &ixp4xx_ops,
62 .preinit = nas100d_pci_preinit,
63 .setup = ixp4xx_setup,
64 .map_irq = nas100d_map_irq,
65 };
66
nas100d_pci_init(void)67 int __init nas100d_pci_init(void)
68 {
69 if (machine_is_nas100d())
70 pci_common_init(&nas100d_pci);
71
72 return 0;
73 }
74
75 subsys_initcall(nas100d_pci_init);
76