1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * arch/powerpc/platforms/embedded6xx/gamecube.c 4 * 5 * Nintendo GameCube board-specific support 6 * Copyright (C) 2004-2009 The GameCube Linux Team 7 * Copyright (C) 2007,2008,2009 Albert Herranz 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/init.h> 12 #include <linux/irq.h> 13 #include <linux/kexec.h> 14 #include <linux/seq_file.h> 15 #include <linux/of_platform.h> 16 17 #include <asm/io.h> 18 #include <asm/machdep.h> 19 #include <asm/time.h> 20 #include <asm/udbg.h> 21 22 #include "flipper-pic.h" 23 #include "usbgecko_udbg.h" 24 25 26 static void __noreturn gamecube_spin(void) 27 { 28 /* spin until power button pressed */ 29 for (;;) 30 cpu_relax(); 31 } 32 33 static void __noreturn gamecube_restart(char *cmd) 34 { 35 local_irq_disable(); 36 flipper_platform_reset(); 37 gamecube_spin(); 38 } 39 40 static void gamecube_power_off(void) 41 { 42 local_irq_disable(); 43 gamecube_spin(); 44 } 45 46 static void __noreturn gamecube_halt(void) 47 { 48 gamecube_restart(NULL); 49 } 50 51 static int __init gamecube_probe(void) 52 { 53 pm_power_off = gamecube_power_off; 54 55 ug_udbg_init(); 56 57 return 1; 58 } 59 60 static void gamecube_shutdown(void) 61 { 62 flipper_quiesce(); 63 } 64 65 define_machine(gamecube) { 66 .name = "gamecube", 67 .compatible = "nintendo,gamecube", 68 .probe = gamecube_probe, 69 .restart = gamecube_restart, 70 .halt = gamecube_halt, 71 .init_IRQ = flipper_pic_probe, 72 .get_irq = flipper_pic_get_irq, 73 .progress = udbg_progress, 74 .machine_shutdown = gamecube_shutdown, 75 }; 76 77 78 static const struct of_device_id gamecube_of_bus[] = { 79 { .compatible = "nintendo,flipper", }, 80 { }, 81 }; 82 83 static int __init gamecube_device_probe(void) 84 { 85 of_platform_bus_probe(NULL, gamecube_of_bus, NULL); 86 return 0; 87 } 88 machine_device_initcall(gamecube, gamecube_device_probe); 89 90