1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *
4 * Copyright (C) 2012 Thomas Langer <thomas.langer@lantiq.com>
5 * Copyright (C) 2012 John Crispin <john@phrozen.org>
6 */
7
8#include <linux/init.h>
9#include <linux/io.h>
10#include <linux/pm.h>
11#include <asm/reboot.h>
12#include <linux/export.h>
13
14#include <lantiq_soc.h>
15
16/*
17 * Dummy implementation.  Used to allow platform code to find out what
18 * source was booted from
19 */
20unsigned char ltq_boot_select(void)
21{
22	return BS_SPI;
23}
24
25#define BOOT_REG_BASE	(KSEG1 | 0x1F200000)
26#define BOOT_PW1_REG	(BOOT_REG_BASE | 0x20)
27#define BOOT_PW2_REG	(BOOT_REG_BASE | 0x24)
28#define BOOT_PW1	0x4C545100
29#define BOOT_PW2	0x0051544C
30
31#define WDT_REG_BASE	(KSEG1 | 0x1F8803F0)
32#define WDT_PW1		0x00BE0000
33#define WDT_PW2		0x00DC0000
34
35static void machine_restart(char *command)
36{
37	local_irq_disable();
38
39	/* reboot magic */
40	ltq_w32(BOOT_PW1, (void *)BOOT_PW1_REG); /* 'LTQ\0' */
41	ltq_w32(BOOT_PW2, (void *)BOOT_PW2_REG); /* '\0QTL' */
42	ltq_w32(0, (void *)BOOT_REG_BASE); /* reset Bootreg RVEC */
43
44	/* watchdog magic */
45	ltq_w32(WDT_PW1, (void *)WDT_REG_BASE);
46	ltq_w32(WDT_PW2 |
47		(0x3 << 26) | /* PWL */
48		(0x2 << 24) | /* CLKDIV */
49		(0x1 << 31) | /* enable */
50		(1), /* reload */
51		(void *)WDT_REG_BASE);
52	unreachable();
53}
54
55static void machine_halt(void)
56{
57	local_irq_disable();
58	unreachable();
59}
60
61static void machine_power_off(void)
62{
63	local_irq_disable();
64	unreachable();
65}
66
67static int __init mips_reboot_setup(void)
68{
69	_machine_restart = machine_restart;
70	_machine_halt = machine_halt;
71	pm_power_off = machine_power_off;
72	return 0;
73}
74
75arch_initcall(mips_reboot_setup);
76