siu.c

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/*
 *  NEC VR4100 series SIU platform device.
 *
 *  Copyright (C) 2007-2008  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/ioport.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/irq.h>

#include <asm/cpu.h>
#include <asm/vr41xx/siu.h>

static unsigned int siu_type1_ports[SIU_PORTS_MAX] __initdata = {
    PORT_VR41XX_SIU,
    PORT_UNKNOWN,
};

static struct resource siu_type1_resource[] __initdata = {
    {
        .start  = 0x0c000000,
        .end    = 0x0c00000a,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = SIU_IRQ,
        .end    = SIU_IRQ,
        .flags  = IORESOURCE_IRQ,
    },
};

static unsigned int siu_type2_ports[SIU_PORTS_MAX] __initdata = {
    PORT_VR41XX_SIU,
    PORT_VR41XX_DSIU,
};

static struct resource siu_type2_resource[] __initdata = {
    {
        .start  = 0x0f000800,
        .end    = 0x0f00080a,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = 0x0f000820,
        .end    = 0x0f000829,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = SIU_IRQ,
        .end    = SIU_IRQ,
        .flags  = IORESOURCE_IRQ,
    },
    {
        .start  = DSIU_IRQ,
        .end    = DSIU_IRQ,
        .flags  = IORESOURCE_IRQ,
    },
};

static int __init vr41xx_siu_add(void)
{
    struct platform_device *pdev;
    struct resource *res;
    unsigned int num;
    int retval;

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

    switch (current_cpu_type()) {
    case CPU_VR4111:
    case CPU_VR4121:
        pdev->dev.platform_data = siu_type1_ports;
        res = siu_type1_resource;
        num = ARRAY_SIZE(siu_type1_resource);
        break;
    case CPU_VR4122:
    case CPU_VR4131:
    case CPU_VR4133:
        pdev->dev.platform_data = siu_type2_ports;
        res = siu_type2_resource;
        num = ARRAY_SIZE(siu_type2_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_siu_add);

void __init vr41xx_siu_setup(void)
{
    struct uart_port port;
    struct resource *res;
    unsigned int *type;
    int i;

    switch (current_cpu_type()) {
    case CPU_VR4111:
    case CPU_VR4121:
        type = siu_type1_ports;
        res = siu_type1_resource;
        break;
    case CPU_VR4122:
    case CPU_VR4131:
    case CPU_VR4133:
        type = siu_type2_ports;
        res = siu_type2_resource;
        break;
    default:
        return;
    }

    for (i = 0; i < SIU_PORTS_MAX; i++) {
        port.line = i;
        port.type = type[i];
        if (port.type == PORT_UNKNOWN)
            break;
        port.mapbase = res[i].start;
        port.membase = (unsigned char __iomem *)KSEG1ADDR(res[i].start);
        vr41xx_siu_early_setup(&port);
    }
}