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
22 #include <asm/mach/pci.h>
23 #include <asm/mach-types.h>
24
nas100d_pci_preinit(void)25 void __init nas100d_pci_preinit(void)
26 {
27 set_irq_type(IRQ_NAS100D_PCI_INTA, IRQ_TYPE_LEVEL_LOW);
28 set_irq_type(IRQ_NAS100D_PCI_INTB, IRQ_TYPE_LEVEL_LOW);
29 set_irq_type(IRQ_NAS100D_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
30 set_irq_type(IRQ_NAS100D_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
31 set_irq_type(IRQ_NAS100D_PCI_INTE, IRQ_TYPE_LEVEL_LOW);
32
33 ixp4xx_pci_preinit();
34 }
35
nas100d_map_irq(struct pci_dev * dev,u8 slot,u8 pin)36 static int __init nas100d_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
37 {
38 static int pci_irq_table[NAS100D_PCI_MAX_DEV][NAS100D_PCI_IRQ_LINES] =
39 {
40 { IRQ_NAS100D_PCI_INTA, -1, -1 },
41 { IRQ_NAS100D_PCI_INTB, -1, -1 },
42 { IRQ_NAS100D_PCI_INTC, IRQ_NAS100D_PCI_INTD, IRQ_NAS100D_PCI_INTE },
43 };
44
45 int irq = -1;
46
47 if (slot >= 1 && slot <= NAS100D_PCI_MAX_DEV &&
48 pin >= 1 && pin <= NAS100D_PCI_IRQ_LINES)
49 irq = pci_irq_table[slot-1][pin-1];
50
51 return irq;
52 }
53
54 struct hw_pci __initdata nas100d_pci = {
55 .nr_controllers = 1,
56 .preinit = nas100d_pci_preinit,
57 .swizzle = pci_std_swizzle,
58 .setup = ixp4xx_setup,
59 .scan = ixp4xx_scan_bus,
60 .map_irq = nas100d_map_irq,
61 };
62
nas100d_pci_init(void)63 int __init nas100d_pci_init(void)
64 {
65 if (machine_is_nas100d())
66 pci_common_init(&nas100d_pci);
67
68 return 0;
69 }
70
71 subsys_initcall(nas100d_pci_init);
72