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
23 #include <asm/mach/pci.h>
24 #include <asm/mach-types.h>
25
dsmg600_pci_preinit(void)26 void __init dsmg600_pci_preinit(void)
27 {
28 set_irq_type(IRQ_DSMG600_PCI_INTA, IRQ_TYPE_LEVEL_LOW);
29 set_irq_type(IRQ_DSMG600_PCI_INTB, IRQ_TYPE_LEVEL_LOW);
30 set_irq_type(IRQ_DSMG600_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
31 set_irq_type(IRQ_DSMG600_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
32 set_irq_type(IRQ_DSMG600_PCI_INTE, IRQ_TYPE_LEVEL_LOW);
33 set_irq_type(IRQ_DSMG600_PCI_INTF, IRQ_TYPE_LEVEL_LOW);
34
35 ixp4xx_pci_preinit();
36 }
37
dsmg600_map_irq(struct pci_dev * dev,u8 slot,u8 pin)38 static int __init dsmg600_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
39 {
40 static int pci_irq_table[DSMG600_PCI_MAX_DEV][DSMG600_PCI_IRQ_LINES] =
41 {
42 { IRQ_DSMG600_PCI_INTE, -1, -1 },
43 { IRQ_DSMG600_PCI_INTA, -1, -1 },
44 { IRQ_DSMG600_PCI_INTB, IRQ_DSMG600_PCI_INTC, IRQ_DSMG600_PCI_INTD },
45 { IRQ_DSMG600_PCI_INTF, -1, -1 },
46 };
47
48 int irq = -1;
49
50 if (slot >= 1 && slot <= DSMG600_PCI_MAX_DEV &&
51 pin >= 1 && pin <= DSMG600_PCI_IRQ_LINES)
52 irq = pci_irq_table[slot-1][pin-1];
53
54 return irq;
55 }
56
57 struct hw_pci __initdata dsmg600_pci = {
58 .nr_controllers = 1,
59 .preinit = dsmg600_pci_preinit,
60 .swizzle = pci_std_swizzle,
61 .setup = ixp4xx_setup,
62 .scan = ixp4xx_scan_bus,
63 .map_irq = dsmg600_map_irq,
64 };
65
dsmg600_pci_init(void)66 int __init dsmg600_pci_init(void)
67 {
68 if (machine_is_dsmg600())
69 pci_common_init(&dsmg600_pci);
70
71 return 0;
72 }
73
74 subsys_initcall(dsmg600_pci_init);
75