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
gamecube_spin(void)27 static void __noreturn gamecube_spin(void)
28 {
29 /* spin until power button pressed */
30 for (;;)
31 cpu_relax();
32 }
33
gamecube_restart(char * cmd)34 static void __noreturn gamecube_restart(char *cmd)
35 {
36 local_irq_disable();
37 flipper_platform_reset();
38 gamecube_spin();
39 }
40
gamecube_power_off(void)41 static void gamecube_power_off(void)
42 {
43 local_irq_disable();
44 gamecube_spin();
45 }
46
gamecube_halt(void)47 static void __noreturn gamecube_halt(void)
48 {
49 gamecube_restart(NULL);
50 }
51
gamecube_probe(void)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
gamecube_shutdown(void)64 static void gamecube_shutdown(void)
65 {
66 flipper_quiesce();
67 }
68
define_machine(gamecube)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
gamecube_device_probe(void)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