[mirror_ubuntu-hirsute-kernel.git] / arch / arm / mach-ixp4xx / nslu2-pci.c

/*
 * arch/arm/mach-ixp4xx/nslu2-pci.c
 *
 * NSLU2 board-level PCI initialization
 *
 * based on ixdp425-pci.c:
 *	Copyright (C) 2002 Intel Corporation.
 *	Copyright (C) 2003-2004 MontaVista Software, Inc.
 *
 * Maintainer: http://www.nslu2-linux.org/
 *
 * 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/pci.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/mach/pci.h>
#include <asm/mach-types.h>

#include "irqs.h"

#define MAX_DEV		3
#define IRQ_LINES	3

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

void __init nslu2_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);
	ixp4xx_pci_preinit();
}

static int __init nslu2_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),
	};

	if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
		return pci_irq_table[(slot + pin - 2) % IRQ_LINES];

	return -1;
}

struct hw_pci __initdata nslu2_pci = {
	.nr_controllers = 1,
	.ops		= &ixp4xx_ops,
	.preinit	= nslu2_pci_preinit,
	.setup		= ixp4xx_setup,
	.map_irq	= nslu2_map_irq,
};

int __init nslu2_pci_init(void) /* monkey see, monkey do */
{
	if (machine_is_nslu2())
		pci_common_init(&nslu2_pci);

	return 0;
}

subsys_initcall(nslu2_pci_init);
Commit	Line	Data
a7918f39 AZ	1	/*
	2	* arch/arm/mach-ixp4xx/nslu2-pci.c
	3	*
	4	* NSLU2 board-level PCI initialization
	5	*
	6	* based on ixdp425-pci.c:
	7	* Copyright (C) 2002 Intel Corporation.
	8	* Copyright (C) 2003-2004 MontaVista Software, Inc.
	9	*
	10	* Maintainer: http://www.nslu2-linux.org/
	11	*
	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.
	15	*
	16	*/
	17
a7918f39 AZ	18	#include <linux/pci.h>
a7918f39 AZ	19	#include <linux/init.h>
f64c2c01	20	#include <linux/irq.h>
a7918f39 AZ	21	#include <asm/mach/pci.h>
	22	#include <asm/mach-types.h>
	23
dc8ef8cd LW	24	#include "irqs.h"
dc8ef8cd LW	25
8d3fdf31 KH	26	#define MAX_DEV 3
8d3fdf31 KH	27	#define IRQ_LINES 3
c1117c63 KH	28
c1117c63 KH	29	/* PCI controller GPIO to IRQ pin mappings */
8d3fdf31 KH	30	#define INTA 11
	31	#define INTB 10
	32	#define INTC 9
	33	#define INTD 8
c1117c63	34
a7918f39 AZ	35	void __init nslu2_pci_preinit(void)
a7918f39 AZ	36	{
6845664a TG	37	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
	38	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
	39	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
a7918f39 AZ	40	ixp4xx_pci_preinit();
	41	}
	42
d5341942	43	static int __init nslu2_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
a7918f39	44	{
8d3fdf31 KH	45	static int pci_irq_table[IRQ_LINES] = {
	46	IXP4XX_GPIO_IRQ(INTA),
	47	IXP4XX_GPIO_IRQ(INTB),
	48	IXP4XX_GPIO_IRQ(INTC),
a7918f39 AZ	49	};
a7918f39 AZ	50
8d3fdf31 KH	51	if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
8d3fdf31 KH	52	return pci_irq_table[(slot + pin - 2) % IRQ_LINES];
a7918f39	53
8d3fdf31	54	return -1;
a7918f39 AZ	55	}
	56
	57	struct hw_pci __initdata nslu2_pci = {
	58	.nr_controllers = 1,
c23bfc38	59	.ops = &ixp4xx_ops,
a7918f39	60	.preinit = nslu2_pci_preinit,
a7918f39	61	.setup = ixp4xx_setup,
a7918f39 AZ	62	.map_irq = nslu2_map_irq,
	63	};
	64
	65	int __init nslu2_pci_init(void) /* monkey see, monkey do */
	66	{
	67	if (machine_is_nslu2())
	68	pci_common_init(&nslu2_pci);
	69
	70	return 0;
	71	}
	72
	73	subsys_initcall(nslu2_pci_init);