LXR linux/arch/powerpc/platforms/embedded6xx/gamecube.c

   1/*
   2 * arch/powerpc/platforms/embedded6xx/gamecube.c
   3 *
   4 * Nintendo GameCube board-specific support
   5 * Copyright (C) 2004-2009 The GameCube Linux Team
   6 * Copyright (C) 2007,2008,2009 Albert Herranz
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License
  10 * as published by the Free Software Foundation; either version 2
  11 * of the License, or (at your option) any later version.
  12 *
  13 */
  14
  15#include <linux/kernel.h>
  16#include <linux/init.h>
  17#include <linux/irq.h>
  18#include <linux/kexec.h>
  19#include <linux/seq_file.h>
  20#include <linux/of_platform.h>
  21
  22#include <asm/io.h>
  23#include <asm/machdep.h>
  24#include <asm/prom.h>
  25#include <asm/time.h>
  26#include <asm/udbg.h>
  27
  28#include "flipper-pic.h"
  29#include "usbgecko_udbg.h"
  30
  31
  32static void gamecube_spin(void)
  33{
  34        /* spin until power button pressed */
  35        for (;;)
  36                cpu_relax();
  37}
  38
  39static void gamecube_restart(char *cmd)
  40{
  41        local_irq_disable();
  42        flipper_platform_reset();
  43        gamecube_spin();
  44}
  45
  46static void gamecube_power_off(void)
  47{
  48        local_irq_disable();
  49        gamecube_spin();
  50}
  51
  52static void gamecube_halt(void)
  53{
  54        gamecube_restart(NULL);
  55}
  56
  57static void __init gamecube_init_early(void)
  58{
  59        ug_udbg_init();
  60}
  61
  62static int __init gamecube_probe(void)
  63{
  64        unsigned long dt_root;
  65
  66        dt_root = of_get_flat_dt_root();
  67        if (!of_flat_dt_is_compatible(dt_root, "nintendo,gamecube"))
  68                return 0;
  69
  70        return 1;
  71}
  72
  73static void gamecube_shutdown(void)
  74{
  75        flipper_quiesce();
  76}
  77
  78define_machine(gamecube) {
  79        .name                   = "gamecube",
  80        .probe                  = gamecube_probe,
  81        .init_early             = gamecube_init_early,
  82        .restart                = gamecube_restart,
  83        .power_off              = gamecube_power_off,
  84        .halt                   = gamecube_halt,
  85        .init_IRQ               = flipper_pic_probe,
  86        .get_irq                = flipper_pic_get_irq,
  87        .calibrate_decr         = generic_calibrate_decr,
  88        .progress               = udbg_progress,
  89        .machine_shutdown       = gamecube_shutdown,
  90};
  91
  92
  93static struct of_device_id gamecube_of_bus[] = {
  94        { .compatible = "nintendo,flipper", },
  95        { },
  96};
  97
  98static int __init gamecube_device_probe(void)
  99{
 100        if (!machine_is(gamecube))
 101                return 0;
 102
 103        of_platform_bus_probe(NULL, gamecube_of_bus, NULL);
 104        return 0;
 105}
 106device_initcall(gamecube_device_probe);
 107
 108