gtwx5715-pci.c

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/*
 * arch/arm/mach-ixp4xx/gtwx5715-pci.c
 *
 * Gemtek GTWX5715 (Linksys WRV54G) board setup
 *
 * Copyright (C) 2004 George T. Joseph
 * Derived from Coyote
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#include <linux/pci.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <asm/mach/pci.h>

#define SLOT0_DEVID 0
#define SLOT1_DEVID 1
#define INTA        10 /* slot 1 has INTA and INTB crossed */
#define INTB        11

/*
 * Slot 0 isn't actually populated with a card connector but
 * we initialize it anyway in case a future version has the
 * slot populated or someone with good soldering skills has
 * some free time.
 */
void __init gtwx5715_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);
    ixp4xx_pci_preinit();
}


static int __init gtwx5715_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
    int rc = -1;

    if ((slot == SLOT0_DEVID && pin == 1) ||
        (slot == SLOT1_DEVID && pin == 2))
        rc = IXP4XX_GPIO_IRQ(INTA);
    else if ((slot == SLOT0_DEVID && pin == 2) ||
         (slot == SLOT1_DEVID && pin == 1))
        rc = IXP4XX_GPIO_IRQ(INTB);

    printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",
           __func__, slot, pin, rc);
    return rc;
}

struct hw_pci gtwx5715_pci __initdata = {
    .nr_controllers = 1,
    .ops        = &ixp4xx_ops,
    .preinit =        gtwx5715_pci_preinit,
    .setup =          ixp4xx_setup,
    .map_irq =        gtwx5715_map_irq,
};

int __init gtwx5715_pci_init(void)
{
    if (machine_is_gtwx5715())
        pci_common_init(&gtwx5715_pci);

    return 0;
}

subsys_initcall(gtwx5715_pci_init);