1/*
2 * arch/arm/mach-ixp4xx/nslu2-pci.c
3 *
4 * NSLU2 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 nslu2_pci_preinit(void)
26{
27	set_irq_type(IRQ_NSLU2_PCI_INTA, IRQT_LOW);
28	set_irq_type(IRQ_NSLU2_PCI_INTB, IRQT_LOW);
29	set_irq_type(IRQ_NSLU2_PCI_INTC, IRQT_LOW);
30
31	ixp4xx_pci_preinit();
32}
33
34static int __init nslu2_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
35{
36	static int pci_irq_table[NSLU2_PCI_IRQ_LINES] = {
37		IRQ_NSLU2_PCI_INTA,
38		IRQ_NSLU2_PCI_INTB,
39		IRQ_NSLU2_PCI_INTC,
40	};
41
42	int irq = -1;
43
44	if (slot >= 1 && slot <= NSLU2_PCI_MAX_DEV &&
45		pin >= 1 && pin <= NSLU2_PCI_IRQ_LINES) {
46			irq = pci_irq_table[(slot + pin - 2) % NSLU2_PCI_IRQ_LINES];
47	}
48
49	return irq;
50}
51
52struct hw_pci __initdata nslu2_pci = {
53	.nr_controllers = 1,
54	.preinit	= nslu2_pci_preinit,
55	.swizzle	= pci_std_swizzle,
56	.setup		= ixp4xx_setup,
57	.scan		= ixp4xx_scan_bus,
58	.map_irq	= nslu2_map_irq,
59};
60
61int __init nslu2_pci_init(void) /* monkey see, monkey do */
62{
63	if (machine_is_nslu2())
64		pci_common_init(&nslu2_pci);
65
66	return 0;
67}
68
69subsys_initcall(nslu2_pci_init);
70