1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/powerpc/platforms/embedded6xx/gamecube.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Nintendo GameCube board-specific support
6*4882a593Smuzhiyun * Copyright (C) 2004-2009 The GameCube Linux Team
7*4882a593Smuzhiyun * Copyright (C) 2007,2008,2009 Albert Herranz
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/irq.h>
13*4882a593Smuzhiyun #include <linux/kexec.h>
14*4882a593Smuzhiyun #include <linux/seq_file.h>
15*4882a593Smuzhiyun #include <linux/of_platform.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #include <asm/io.h>
18*4882a593Smuzhiyun #include <asm/machdep.h>
19*4882a593Smuzhiyun #include <asm/prom.h>
20*4882a593Smuzhiyun #include <asm/time.h>
21*4882a593Smuzhiyun #include <asm/udbg.h>
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #include "flipper-pic.h"
24*4882a593Smuzhiyun #include "usbgecko_udbg.h"
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun
gamecube_spin(void)27*4882a593Smuzhiyun static void __noreturn gamecube_spin(void)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun /* spin until power button pressed */
30*4882a593Smuzhiyun for (;;)
31*4882a593Smuzhiyun cpu_relax();
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
gamecube_restart(char * cmd)34*4882a593Smuzhiyun static void __noreturn gamecube_restart(char *cmd)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun local_irq_disable();
37*4882a593Smuzhiyun flipper_platform_reset();
38*4882a593Smuzhiyun gamecube_spin();
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
gamecube_power_off(void)41*4882a593Smuzhiyun static void gamecube_power_off(void)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun local_irq_disable();
44*4882a593Smuzhiyun gamecube_spin();
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
gamecube_halt(void)47*4882a593Smuzhiyun static void __noreturn gamecube_halt(void)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun gamecube_restart(NULL);
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
gamecube_probe(void)52*4882a593Smuzhiyun static int __init gamecube_probe(void)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun if (!of_machine_is_compatible("nintendo,gamecube"))
55*4882a593Smuzhiyun return 0;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun pm_power_off = gamecube_power_off;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun ug_udbg_init();
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun return 1;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
gamecube_shutdown(void)64*4882a593Smuzhiyun static void gamecube_shutdown(void)
65*4882a593Smuzhiyun {
66*4882a593Smuzhiyun flipper_quiesce();
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
define_machine(gamecube)69*4882a593Smuzhiyun define_machine(gamecube) {
70*4882a593Smuzhiyun .name = "gamecube",
71*4882a593Smuzhiyun .probe = gamecube_probe,
72*4882a593Smuzhiyun .restart = gamecube_restart,
73*4882a593Smuzhiyun .halt = gamecube_halt,
74*4882a593Smuzhiyun .init_IRQ = flipper_pic_probe,
75*4882a593Smuzhiyun .get_irq = flipper_pic_get_irq,
76*4882a593Smuzhiyun .calibrate_decr = generic_calibrate_decr,
77*4882a593Smuzhiyun .progress = udbg_progress,
78*4882a593Smuzhiyun .machine_shutdown = gamecube_shutdown,
79*4882a593Smuzhiyun };
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun static const struct of_device_id gamecube_of_bus[] = {
83*4882a593Smuzhiyun { .compatible = "nintendo,flipper", },
84*4882a593Smuzhiyun { },
85*4882a593Smuzhiyun };
86*4882a593Smuzhiyun
gamecube_device_probe(void)87*4882a593Smuzhiyun static int __init gamecube_device_probe(void)
88*4882a593Smuzhiyun {
89*4882a593Smuzhiyun if (!machine_is(gamecube))
90*4882a593Smuzhiyun return 0;
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun of_platform_bus_probe(NULL, gamecube_of_bus, NULL);
93*4882a593Smuzhiyun return 0;
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun device_initcall(gamecube_device_probe);
96*4882a593Smuzhiyun
97