78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
|
/*
|
||
|
|
* 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,
|
||
|
|
.preinit = miccpt_pci_preinit,
|
||
|
|
.setup = ixp4xx_setup,
|
||
|
|
.scan = ixp4xx_scan_bus,
|
||
|
|
.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);
|