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
gamecube_spin(void)26 static void __noreturn gamecube_spin(void)
27 {
28 /* spin until power button pressed */
29 for (;;)
30 cpu_relax();
31 }
32
gamecube_restart(char * cmd)33 static void __noreturn gamecube_restart(char *cmd)
34 {
35 local_irq_disable();
36 flipper_platform_reset();
37 gamecube_spin();
38 }
39
gamecube_power_off(void)40 static void gamecube_power_off(void)
41 {
42 local_irq_disable();
43 gamecube_spin();
44 }
45
gamecube_halt(void)46 static void __noreturn gamecube_halt(void)
47 {
48 gamecube_restart(NULL);
49 }
50
gamecube_probe(void)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
gamecube_shutdown(void)63 static void gamecube_shutdown(void)
64 {
65 flipper_quiesce();
66 }
67
define_machine(gamecube)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
gamecube_device_probe(void)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
