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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 
 32 static void gamecube_spin(void)
 33 {
 34         /* spin until power button pressed */
 35         for (;;)
 36                 cpu_relax();
 37 }
 38 
 39 static void gamecube_restart(char *cmd)
 40 {
 41         local_irq_disable();
 42         flipper_platform_reset();
 43         gamecube_spin();
 44 }
 45 
 46 static void gamecube_power_off(void)
 47 {
 48         local_irq_disable();
 49         gamecube_spin();
 50 }
 51 
 52 static void gamecube_halt(void)
 53 {
 54         gamecube_restart(NULL);
 55 }
 56 
 57 static void __init gamecube_init_early(void)
 58 {
 59         ug_udbg_init();
 60 }
 61 
 62 static 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 
 73 static void gamecube_shutdown(void)
 74 {
 75         flipper_quiesce();
 76 }
 77 
 78 define_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 
 93 static const struct of_device_id gamecube_of_bus[] = {
 94         { .compatible = "nintendo,flipper", },
 95         { },
 96 };
 97 
 98 static 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 }
106 device_initcall(gamecube_device_probe);
107 
108 

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