2 * arch/arm/mach-ixp4xx/nslu2-pci.c
4 * NSLU2 board-level PCI initialization
6 * based on ixdp425-pci.c:
7 * Copyright (C) 2002 Intel Corporation.
8 * Copyright (C) 2003-2004 MontaVista Software, Inc.
10 * Maintainer: http://www.nslu2-linux.org/
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.
18 #include <linux/config.h>
19 #include <linux/pci.h>
20 #include <linux/init.h>
22 #include <asm/mach/pci.h>
23 #include <asm/mach-types.h>
25 void __init nslu2_pci_preinit(void)
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);
31 gpio_line_isr_clear(NSLU2_PCI_INTA_PIN);
32 gpio_line_isr_clear(NSLU2_PCI_INTB_PIN);
33 gpio_line_isr_clear(NSLU2_PCI_INTC_PIN);
35 /* INTD is not configured as GPIO is used
36 * for the power input button.
42 static int __init nslu2_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
44 static int pci_irq_table[NSLU2_PCI_IRQ_LINES] = {
52 if (slot >= 1 && slot <= NSLU2_PCI_MAX_DEV &&
53 pin >= 1 && pin <= NSLU2_PCI_IRQ_LINES) {
54 irq = pci_irq_table[(slot + pin - 2) % NSLU2_PCI_IRQ_LINES];
60 struct hw_pci __initdata nslu2_pci = {
62 .preinit = nslu2_pci_preinit,
63 .swizzle = pci_std_swizzle,
64 .setup = ixp4xx_setup,
65 .scan = ixp4xx_scan_bus,
66 .map_irq = nslu2_map_irq,
69 int __init nslu2_pci_init(void) /* monkey see, monkey do */
71 if (machine_is_nslu2())
72 pci_common_init(&nslu2_pci);
77 subsys_initcall(nslu2_pci_init);