gamecube.c

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/*
 * arch/powerpc/platforms/embedded6xx/gamecube.c
 *
 * Nintendo GameCube board-specific support
 * Copyright (C) 2004-2009 The GameCube Linux Team
 * Copyright (C) 2007,2008,2009 Albert Herranz
 *
 * 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.
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/kexec.h>
#include <linux/seq_file.h>
#include <linux/of_platform.h>

#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/time.h>
#include <asm/udbg.h>

#include "flipper-pic.h"
#include "usbgecko_udbg.h"


static void gamecube_spin(void)
{
    /* spin until power button pressed */
    for (;;)
        cpu_relax();
}

static void gamecube_restart(char *cmd)
{
    local_irq_disable();
    flipper_platform_reset();
    gamecube_spin();
}

static void gamecube_power_off(void)
{
    local_irq_disable();
    gamecube_spin();
}

static void gamecube_halt(void)
{
    gamecube_restart(NULL);
}

static void __init gamecube_init_early(void)
{
    ug_udbg_init();
}

static int __init gamecube_probe(void)
{
    unsigned long dt_root;

    dt_root = of_get_flat_dt_root();
    if (!of_flat_dt_is_compatible(dt_root, "nintendo,gamecube"))
        return 0;

    return 1;
}

static void gamecube_shutdown(void)
{
    flipper_quiesce();
}

define_machine(gamecube) {
    .name           = "gamecube",
    .probe          = gamecube_probe,
    .init_early     = gamecube_init_early,
    .restart        = gamecube_restart,
    .power_off      = gamecube_power_off,
    .halt           = gamecube_halt,
    .init_IRQ       = flipper_pic_probe,
    .get_irq        = flipper_pic_get_irq,
    .calibrate_decr     = generic_calibrate_decr,
    .progress       = udbg_progress,
    .machine_shutdown   = gamecube_shutdown,
};


static struct of_device_id gamecube_of_bus[] = {
    { .compatible = "nintendo,flipper", },
    { },
};

static int __init gamecube_device_probe(void)
{
    if (!machine_is(gamecube))
        return 0;

    of_platform_bus_probe(NULL, gamecube_of_bus, NULL);
    return 0;
}
device_initcall(gamecube_device_probe);