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