1 /*
2  * arch/powerpc/platforms/embedded6xx/gamecube.c
3  *
4  * Nintendo GameCube board-specific support
5  * Copyright (C) 2004-2009 The GameCube Linux Team
6  * Copyright (C) 2007,2008,2009 Albert Herranz
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * as published by the Free Software Foundation; either version 2
11  * of the License, or (at your option) any later version.
12  *
13  */
14 
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/irq.h>
18 #include <linux/kexec.h>
19 #include <linux/seq_file.h>
20 #include <linux/of_platform.h>
21 
22 #include <asm/io.h>
23 #include <asm/machdep.h>
24 #include <asm/prom.h>
25 #include <asm/time.h>
26 #include <asm/udbg.h>
27 
28 #include "flipper-pic.h"
29 #include "usbgecko_udbg.h"
30 
31 
32 static void gamecube_spin(void)
33 {
34 	/* spin until power button pressed */
35 	for (;;)
36 		cpu_relax();
37 }
38 
39 static void gamecube_restart(char *cmd)
40 {
41 	local_irq_disable();
42 	flipper_platform_reset();
43 	gamecube_spin();
44 }
45 
46 static void gamecube_power_off(void)
47 {
48 	local_irq_disable();
49 	gamecube_spin();
50 }
51 
52 static void gamecube_halt(void)
53 {
54 	gamecube_restart(NULL);
55 }
56 
57 static void __init gamecube_init_early(void)
58 {
59 	ug_udbg_init();
60 }
61 
62 static int __init gamecube_probe(void)
63 {
64 	unsigned long dt_root;
65 
66 	dt_root = of_get_flat_dt_root();
67 	if (!of_flat_dt_is_compatible(dt_root, "nintendo,gamecube"))
68 		return 0;
69 
70 	return 1;
71 }
72 
73 static void gamecube_shutdown(void)
74 {
75 	flipper_quiesce();
76 }
77 
78 define_machine(gamecube) {
79 	.name			= "gamecube",
80 	.probe			= gamecube_probe,
81 	.init_early		= gamecube_init_early,
82 	.restart		= gamecube_restart,
83 	.power_off		= gamecube_power_off,
84 	.halt			= gamecube_halt,
85 	.init_IRQ		= flipper_pic_probe,
86 	.get_irq		= flipper_pic_get_irq,
87 	.calibrate_decr		= generic_calibrate_decr,
88 	.progress		= udbg_progress,
89 	.machine_shutdown	= gamecube_shutdown,
90 };
91 
92 
93 static struct of_device_id gamecube_of_bus[] = {
94 	{ .compatible = "nintendo,flipper", },
95 	{ },
96 };
97 
98 static int __init gamecube_device_probe(void)
99 {
100 	if (!machine_is(gamecube))
101 		return 0;
102 
103 	of_platform_bus_probe(NULL, gamecube_of_bus, NULL);
104 	return 0;
105 }
106 device_initcall(gamecube_device_probe);
107 
108