]>
Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
d41ced01 | 2 | /* |
d41ced01 JC |
3 | * |
4 | * Copyright (C) 2012 Thomas Langer <thomas.langer@lantiq.com> | |
97b92108 | 5 | * Copyright (C) 2012 John Crispin <john@phrozen.org> |
d41ced01 JC |
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 | ||
4dcfadb1 RB |
16 | /* |
17 | * Dummy implementation. Used to allow platform code to find out what | |
18 | * source was booted from | |
19 | */ | |
d41ced01 JC |
20 | unsigned char ltq_boot_select(void) |
21 | { | |
4dcfadb1 | 22 | return BS_SPI; |
d41ced01 JC |
23 | } |
24 | ||
d41ced01 JC |
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 | ||
35 | static 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 | ||
55 | static void machine_halt(void) | |
56 | { | |
57 | local_irq_disable(); | |
58 | unreachable(); | |
59 | } | |
60 | ||
61 | static void machine_power_off(void) | |
62 | { | |
63 | local_irq_disable(); | |
64 | unreachable(); | |
65 | } | |
66 | ||
67 | static 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 | ||
75 | arch_initcall(mips_reboot_setup); |