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/prom.h> 20 #include <asm/time.h> 21 #include <asm/udbg.h> 22 23 #include "flipper-pic.h" 24 #include "usbgecko_udbg.h" 25 26 27 static void __noreturn gamecube_spin(void) 28 { 29 /* spin until power button pressed */ 30 for (;;) 31 cpu_relax(); 32 } 33 34 static void __noreturn gamecube_restart(char *cmd) 35 { 36 local_irq_disable(); 37 flipper_platform_reset(); 38 gamecube_spin(); 39 } 40 41 static void gamecube_power_off(void) 42 { 43 local_irq_disable(); 44 gamecube_spin(); 45 } 46 47 static void __noreturn gamecube_halt(void) 48 { 49 gamecube_restart(NULL); 50 } 51 52 static int __init gamecube_probe(void) 53 { 54 if (!of_machine_is_compatible("nintendo,gamecube")) 55 return 0; 56 57 pm_power_off = gamecube_power_off; 58 59 ug_udbg_init(); 60 61 return 1; 62 } 63 64 static void gamecube_shutdown(void) 65 { 66 flipper_quiesce(); 67 } 68 69 define_machine(gamecube) { 70 .name = "gamecube", 71 .probe = gamecube_probe, 72 .restart = gamecube_restart, 73 .halt = gamecube_halt, 74 .init_IRQ = flipper_pic_probe, 75 .get_irq = flipper_pic_get_irq, 76 .calibrate_decr = generic_calibrate_decr, 77 .progress = udbg_progress, 78 .machine_shutdown = gamecube_shutdown, 79 }; 80 81 82 static const struct of_device_id gamecube_of_bus[] = { 83 { .compatible = "nintendo,flipper", }, 84 { }, 85 }; 86 87 static int __init gamecube_device_probe(void) 88 { 89 if (!machine_is(gamecube)) 90 return 0; 91 92 of_platform_bus_probe(NULL, gamecube_of_bus, NULL); 93 return 0; 94 } 95 device_initcall(gamecube_device_probe); 96 97