miccpt-pci.c
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/*
* arch/arm/mach-ixp4xx/miccpt-pci.c
*
* MICCPT board-level PCI initialization
*
* Copyright (C) 2002 Intel Corporation.
* Copyright (C) 2003-2004 MontaVista Software, Inc.
* Copyright (C) 2006 OMICRON electronics GmbH
*
* Author: Michael Jochum <michael.jochum@omicron.at>
*
* 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/delay.h>
#include <linux/irq.h>
#include <asm/mach/pci.h>
#include <asm/irq.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
#define MAX_DEV 4
#define IRQ_LINES 4
/* PCI controller GPIO to IRQ pin mappings */
#define INTA 1
#define INTB 2
#define INTC 3
#define INTD 4
void __init miccpt_pci_preinit(void)
{
irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
ixp4xx_pci_preinit();
}
static int __init miccpt_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
static int pci_irq_table[IRQ_LINES] = {
IXP4XX_GPIO_IRQ(INTA),
IXP4XX_GPIO_IRQ(INTB),
IXP4XX_GPIO_IRQ(INTC),
IXP4XX_GPIO_IRQ(INTD)
};
if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
return pci_irq_table[(slot + pin - 2) % 4];
return -1;
}
struct hw_pci miccpt_pci __initdata = {
.nr_controllers = 1,
.ops = &ixp4xx_ops,
.preinit = miccpt_pci_preinit,
.setup = ixp4xx_setup,
.map_irq = miccpt_map_irq,
};
int __init miccpt_pci_init(void)
{
if (machine_is_miccpt())
pci_common_init(&miccpt_pci);
return 0;
}
subsys_initcall(miccpt_pci_init);