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 if (!of_machine_is_compatible("nintendo,gamecube")) 54 return 0; 55 56 pm_power_off = gamecube_power_off; 57 58 ug_udbg_init(); 59 60 return 1; 61 } 62 63 static void gamecube_shutdown(void) 64 { 65 flipper_quiesce(); 66 } 67 68 define_machine(gamecube) { 69 .name = "gamecube", 70 .probe = gamecube_probe, 71 .restart = gamecube_restart, 72 .halt = gamecube_halt, 73 .init_IRQ = flipper_pic_probe, 74 .get_irq = flipper_pic_get_irq, 75 .calibrate_decr = generic_calibrate_decr, 76 .progress = udbg_progress, 77 .machine_shutdown = gamecube_shutdown, 78 }; 79 80 81 static const struct of_device_id gamecube_of_bus[] = { 82 { .compatible = "nintendo,flipper", }, 83 { }, 84 }; 85 86 static int __init gamecube_device_probe(void) 87 { 88 if (!machine_is(gamecube)) 89 return 0; 90 91 of_platform_bus_probe(NULL, gamecube_of_bus, NULL); 92 return 0; 93 } 94 device_initcall(gamecube_device_probe); 95 96