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 pm_power_off = gamecube_power_off; 71 72 return 1; 73 } 74 75 static void gamecube_shutdown(void) 76 { 77 flipper_quiesce(); 78 } 79 80 define_machine(gamecube) { 81 .name = "gamecube", 82 .probe = gamecube_probe, 83 .init_early = gamecube_init_early, 84 .restart = gamecube_restart, 85 .halt = gamecube_halt, 86 .init_IRQ = flipper_pic_probe, 87 .get_irq = flipper_pic_get_irq, 88 .calibrate_decr = generic_calibrate_decr, 89 .progress = udbg_progress, 90 .machine_shutdown = gamecube_shutdown, 91 }; 92 93 94 static const struct of_device_id gamecube_of_bus[] = { 95 { .compatible = "nintendo,flipper", }, 96 { }, 97 }; 98 99 static int __init gamecube_device_probe(void) 100 { 101 if (!machine_is(gamecube)) 102 return 0; 103 104 of_platform_bus_probe(NULL, gamecube_of_bus, NULL); 105 return 0; 106 } 107 device_initcall(gamecube_device_probe); 108 109