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
25void __init nas100d_pci_preinit(void)
26{
27	set_irq_type(IRQ_NAS100D_PCI_INTA, IRQT_LOW);
28	set_irq_type(IRQ_NAS100D_PCI_INTB, IRQT_LOW);
29	set_irq_type(IRQ_NAS100D_PCI_INTC, IRQT_LOW);
30	set_irq_type(IRQ_NAS100D_PCI_INTD, IRQT_LOW);
31	set_irq_type(IRQ_NAS100D_PCI_INTE, IRQT_LOW);
32
33	ixp4xx_pci_preinit();
34}
35
36static 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
54struct 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
63int __init nas100d_pci_init(void)
64{
65	if (machine_is_nas100d())
66		pci_common_init(&nas100d_pci);
67
68	return 0;
69}
70
71subsys_initcall(nas100d_pci_init);
72