1 /*
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>
22 #include <asm/mach/pci.h>
23 #include <asm/mach-types.h>
24
25 #define MAX_DEV 4
26 #define IRQ_LINES 3
27
28 /* PCI controller GPIO to IRQ pin mappings */
29 #define INTA 11
30 #define INTB 10
31 #define INTC 9
32 #define INTD 8
33 #define INTE 7
34 #define INTF 6
35
dsmg600_pci_preinit(void)36 void __init dsmg600_pci_preinit(void)
37 {
38 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);
44 ixp4xx_pci_preinit();
45 }
46
dsmg600_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)47 static int __init dsmg600_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
48 {
49 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 },
55 };
56
57 if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
58 return pci_irq_table[slot - 1][pin - 1];
59
60 return -1;
61 }
62
63 struct hw_pci __initdata dsmg600_pci = {
64 .nr_controllers = 1,
65 .ops = &ixp4xx_ops,
66 .preinit = dsmg600_pci_preinit,
67 .setup = ixp4xx_setup,
68 .map_irq = dsmg600_map_irq,
69 };
70
dsmg600_pci_init(void)71 int __init dsmg600_pci_init(void)
72 {
73 if (machine_is_dsmg600())
74 pci_common_init(&dsmg600_pci);
75
76 return 0;
77 }
78
79 subsys_initcall(dsmg600_pci_init);
80
