dsmg600-pci.c

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/*
 * DSM-G600 board-level PCI initialization
 *
 * Copyright (C) 2006 Tower Technologies
 * Author: Alessandro Zummo <[email protected]>
 *
 * 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>

#define MAX_DEV     4
#define IRQ_LINES   3

/* PCI controller GPIO to IRQ pin mappings */
#define INTA        11
#define INTB        10
#define INTC        9
#define INTD        8
#define INTE        7
#define INTF        6

void __init dsmg600_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);
    irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(IXP4XX_GPIO_IRQ(INTF), IRQ_TYPE_LEVEL_LOW);
    ixp4xx_pci_preinit();
}

static int __init dsmg600_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
    static int pci_irq_table[MAX_DEV][IRQ_LINES] = {
        { IXP4XX_GPIO_IRQ(INTE), -1, -1 },
        { IXP4XX_GPIO_IRQ(INTA), -1, -1 },
        { IXP4XX_GPIO_IRQ(INTB), IXP4XX_GPIO_IRQ(INTC),
          IXP4XX_GPIO_IRQ(INTD) },
        { IXP4XX_GPIO_IRQ(INTF), -1, -1 },
    };

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

    return -1;
}

struct hw_pci __initdata dsmg600_pci = {
    .nr_controllers = 1,
    .ops        = &ixp4xx_ops,
    .preinit    = dsmg600_pci_preinit,
    .setup      = ixp4xx_setup,
    .map_irq    = dsmg600_map_irq,
};

int __init dsmg600_pci_init(void)
{
    if (machine_is_dsmg600())
        pci_common_init(&dsmg600_pci);

    return 0;
}

subsys_initcall(dsmg600_pci_init);