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 __noreturn gamecube_spin(void)
  33{
  34        /* spin until power button pressed */
  35        for (;;)
  36                cpu_relax();
  37}
  38
  39static void __noreturn 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 __noreturn gamecube_halt(void)
  53{
  54        gamecube_restart(NULL);
  55}
  56
  57static int __init gamecube_probe(void)
  58{
  59        if (!of_machine_is_compatible("nintendo,gamecube"))
  60                return 0;
  61
  62        pm_power_off = gamecube_power_off;
  63
  64        ug_udbg_init();
  65
  66        return 1;
  67}
  68
  69static void gamecube_shutdown(void)
  70{
  71        flipper_quiesce();
  72}
  73
  74define_machine(gamecube) {
  75        .name                   = "gamecube",
  76        .probe                  = gamecube_probe,
  77        .restart                = gamecube_restart,
  78        .halt                   = gamecube_halt,
  79        .init_IRQ               = flipper_pic_probe,
  80        .get_irq                = flipper_pic_get_irq,
  81        .calibrate_decr         = generic_calibrate_decr,
  82        .progress               = udbg_progress,
  83        .machine_shutdown       = gamecube_shutdown,
  84};
  85
  86
  87static const struct of_device_id gamecube_of_bus[] = {
  88        { .compatible = "nintendo,flipper", },
  89        { },
  90};
  91
  92static int __init gamecube_device_probe(void)
  93{
  94        if (!machine_is(gamecube))
  95                return 0;
  96
  97        of_platform_bus_probe(NULL, gamecube_of_bus, NULL);
  98        return 0;
  99}
 100device_initcall(gamecube_device_probe);
 101
 102