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/*
* arch/arm/mach-ixp4xx/ixdp425-pci.c
*
* IXDP425 board-level PCI initialization
*
* Copyright (C) 2002 Intel Corporation.
* Copyright (C) 2003-2004 MontaVista Software, Inc.
*
* Maintainer: Deepak Saxena <dsaxena@plexity.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <asm/mach/pci.h>
#include <asm/irq.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
#define IXDP425_PCI_MAX_DEV 4
#define IXDP425_PCI_IRQ_LINES 4
/* PCI controller GPIO to IRQ pin mappings */
#define IXDP425_PCI_INTA_PIN 11
#define IXDP425_PCI_INTB_PIN 10
#define IXDP425_PCI_INTC_PIN 9
#define IXDP425_PCI_INTD_PIN 8
#define IRQ_IXDP425_PCI_INTA IRQ_IXP4XX_GPIO11
#define IRQ_IXDP425_PCI_INTB IRQ_IXP4XX_GPIO10
#define IRQ_IXDP425_PCI_INTC IRQ_IXP4XX_GPIO9
#define IRQ_IXDP425_PCI_INTD IRQ_IXP4XX_GPIO8
void __init ixdp425_pci_preinit(void)
{
set_irq_type(IRQ_IXDP425_PCI_INTA, IRQ_TYPE_LEVEL_LOW);
set_irq_type(IRQ_IXDP425_PCI_INTB, IRQ_TYPE_LEVEL_LOW);
set_irq_type(IRQ_IXDP425_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
set_irq_type(IRQ_IXDP425_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
ixp4xx_pci_preinit();
}
static int __init ixdp425_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
static int pci_irq_table[IXDP425_PCI_IRQ_LINES] = {
IRQ_IXDP425_PCI_INTA,
IRQ_IXDP425_PCI_INTB,
IRQ_IXDP425_PCI_INTC,
IRQ_IXDP425_PCI_INTD
};
int irq = -1;
if (slot >= 1 && slot <= IXDP425_PCI_MAX_DEV &&
pin >= 1 && pin <= IXDP425_PCI_IRQ_LINES) {
irq = pci_irq_table[(slot + pin - 2) % 4];
}
return irq;
}
struct hw_pci ixdp425_pci __initdata = {
.nr_controllers = 1,
.preinit = ixdp425_pci_preinit,
.swizzle = pci_std_swizzle,
.setup = ixp4xx_setup,
.scan = ixp4xx_scan_bus,
.map_irq = ixdp425_map_irq,
};
int __init ixdp425_pci_init(void)
{
if (machine_is_ixdp425() || machine_is_ixcdp1100() ||
machine_is_ixdp465() || machine_is_kixrp435())
pci_common_init(&ixdp425_pci);
return 0;
}
subsys_initcall(ixdp425_pci_init);
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