giu.c

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/*
 *  NEC VR4100 series GIU platform device.
 *
 *  Copyright (C) 2007  Yoichi Yuasa <[email protected]>
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>

#include <asm/cpu.h>
#include <asm/vr41xx/giu.h>
#include <asm/vr41xx/irq.h>

static struct resource giu_50pins_pullupdown_resource[] __initdata = {
    {
        .start  = 0x0b000100,
        .end    = 0x0b00011f,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = 0x0b0002e0,
        .end    = 0x0b0002e3,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = GIUINT_IRQ,
        .end    = GIUINT_IRQ,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct resource giu_36pins_resource[] __initdata = {
    {
        .start  = 0x0f000140,
        .end    = 0x0f00015f,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = GIUINT_IRQ,
        .end    = GIUINT_IRQ,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct resource giu_48pins_resource[] __initdata = {
    {
        .start  = 0x0f000140,
        .end    = 0x0f000167,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = GIUINT_IRQ,
        .end    = GIUINT_IRQ,
        .flags  = IORESOURCE_IRQ,
    },
};

static int __init vr41xx_giu_add(void)
{
    struct platform_device *pdev;
    struct resource *res;
    unsigned int num;
    int retval;

    pdev = platform_device_alloc("GIU", -1);
    if (!pdev)
        return -ENOMEM;

    switch (current_cpu_type()) {
    case CPU_VR4111:
    case CPU_VR4121:
        pdev->id = GPIO_50PINS_PULLUPDOWN;
        res = giu_50pins_pullupdown_resource;
        num = ARRAY_SIZE(giu_50pins_pullupdown_resource);
        break;
    case CPU_VR4122:
    case CPU_VR4131:
        pdev->id = GPIO_36PINS;
        res = giu_36pins_resource;
        num = ARRAY_SIZE(giu_36pins_resource);
        break;
    case CPU_VR4133:
        pdev->id = GPIO_48PINS_EDGE_SELECT;
        res = giu_48pins_resource;
        num = ARRAY_SIZE(giu_48pins_resource);
        break;
    default:
        retval = -ENODEV;
        goto err_free_device;
    }

    retval = platform_device_add_resources(pdev, res, num);
    if (retval)
        goto err_free_device;

    retval = platform_device_add(pdev);
    if (retval)
        goto err_free_device;

    return 0;

err_free_device:
    platform_device_put(pdev);

    return retval;
}
device_initcall(vr41xx_giu_add);