[deliverable/linux.git] / arch / arm / mach-ixp4xx / ixdp425-pci.c

/*
 * 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 MAX_DEV		4
#define IRQ_LINES	4

/* PCI controller GPIO to IRQ pin mappings */
#define INTA		11
#define INTB		10
#define INTC		9
#define INTD		8


void __init ixdp425_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 ixdp425_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 ixdp425_pci __initdata = {
	.nr_controllers = 1,
	.ops		= &ixp4xx_ops,
	.preinit	= ixdp425_pci_preinit,
	.setup		= ixp4xx_setup,
	.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);
Commit	Line	Data
	1	/*
	2	* arch/arm/mach-ixp4xx/ixdp425-pci.c
	3	*
	4	* IXDP425 board-level PCI initialization
	5	*
	6	* Copyright (C) 2002 Intel Corporation.
	7	* Copyright (C) 2003-2004 MontaVista Software, Inc.
	8	*
	9	* Maintainer: Deepak Saxena <dsaxena@plexity.net>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*
	15	*/
	16
	17	#include <linux/kernel.h>
	18	#include <linux/pci.h>
	19	#include <linux/init.h>
	20	#include <linux/irq.h>
	21	#include <linux/delay.h>
	22	#include <asm/mach/pci.h>
	23	#include <asm/irq.h>
	24	#include <mach/hardware.h>
	25	#include <asm/mach-types.h>
	26
	27	#define MAX_DEV 4
	28	#define IRQ_LINES 4
	29
	30	/* PCI controller GPIO to IRQ pin mappings */
	31	#define INTA 11
	32	#define INTB 10
	33	#define INTC 9
	34	#define INTD 8
	35
	36
	37	void __init ixdp425_pci_preinit(void)
	38	{
	39	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
	40	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
	41	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
	42	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
	43	ixp4xx_pci_preinit();
	44	}
	45
	46	static int __init ixdp425_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
	47	{
	48	static int pci_irq_table[IRQ_LINES] = {
	49	IXP4XX_GPIO_IRQ(INTA),
	50	IXP4XX_GPIO_IRQ(INTB),
	51	IXP4XX_GPIO_IRQ(INTC),
	52	IXP4XX_GPIO_IRQ(INTD)
	53	};
	54
	55	if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
	56	return pci_irq_table[(slot + pin - 2) % 4];
	57
	58	return -1;
	59	}
	60
	61	struct hw_pci ixdp425_pci __initdata = {
	62	.nr_controllers = 1,
	63	.ops = &ixp4xx_ops,
	64	.preinit = ixdp425_pci_preinit,
	65	.setup = ixp4xx_setup,
	66	.map_irq = ixdp425_map_irq,
	67	};
	68
	69	int __init ixdp425_pci_init(void)
	70	{
	71	if (machine_is_ixdp425() \|\| machine_is_ixcdp1100() \|\|
	72	machine_is_ixdp465() \|\| machine_is_kixrp435())
	73	pci_common_init(&ixdp425_pci);
	74	return 0;
	75	}
	76
	77	subsys_initcall(ixdp425_pci_init);