projects / mirror_ubuntu-focal-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| d41ced01 JC |
1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify it | |
| 3 | * under the terms of the GNU General Public License version 2 as published | |
| 4 | * by the Free Software Foundation. | |
| 5 | * | |
| 6 | * Copyright (C) 2012 Thomas Langer <thomas.langer@lantiq.com> | |
| 97b92108 | 7 | * Copyright (C) 2012 John Crispin <john@phrozen.org> |
| d41ced01 JC |
8 | */ |
| 9 | ||
| 10 | #include <linux/init.h> | |
| 11 | #include <linux/io.h> | |
| 12 | #include <linux/pm.h> | |
| 13 | #include <asm/reboot.h> | |
| 14 | #include <linux/export.h> | |
| 15 | ||
| 16 | #include <lantiq_soc.h> | |
| 17 | ||
| 4dcfadb1 RB |
18 | /* |
| 19 | * Dummy implementation. Used to allow platform code to find out what | |
| 20 | * source was booted from | |
| 21 | */ | |
| d41ced01 JC |
22 | unsigned char ltq_boot_select(void) |
| 23 | { | |
| 4dcfadb1 | 24 | return BS_SPI; |
| d41ced01 JC |
25 | } |
| 26 | ||
| d41ced01 JC |
27 | #define BOOT_REG_BASE (KSEG1 | 0x1F200000) |
| 28 | #define BOOT_PW1_REG (BOOT_REG_BASE | 0x20) | |
| 29 | #define BOOT_PW2_REG (BOOT_REG_BASE | 0x24) | |
| 30 | #define BOOT_PW1 0x4C545100 | |
| 31 | #define BOOT_PW2 0x0051544C | |
| 32 | ||
| 33 | #define WDT_REG_BASE (KSEG1 | 0x1F8803F0) | |
| 34 | #define WDT_PW1 0x00BE0000 | |
| 35 | #define WDT_PW2 0x00DC0000 | |
| 36 | ||
| 37 | static void machine_restart(char *command) | |
| 38 | { | |
| 39 | local_irq_disable(); | |
| 40 | ||
| 41 | /* reboot magic */ | |
| 42 | ltq_w32(BOOT_PW1, (void *)BOOT_PW1_REG); /* 'LTQ\0' */ | |
| 43 | ltq_w32(BOOT_PW2, (void *)BOOT_PW2_REG); /* '\0QTL' */ | |
| 44 | ltq_w32(0, (void *)BOOT_REG_BASE); /* reset Bootreg RVEC */ | |
| 45 | ||
| 46 | /* watchdog magic */ | |
| 47 | ltq_w32(WDT_PW1, (void *)WDT_REG_BASE); | |
| 48 | ltq_w32(WDT_PW2 | | |
| 49 | (0x3 << 26) | /* PWL */ | |
| 50 | (0x2 << 24) | /* CLKDIV */ | |
| 51 | (0x1 << 31) | /* enable */ | |
| 52 | (1), /* reload */ | |
| 53 | (void *)WDT_REG_BASE); | |
| 54 | unreachable(); | |
| 55 | } | |
| 56 | ||
| 57 | static void machine_halt(void) | |
| 58 | { | |
| 59 | local_irq_disable(); | |
| 60 | unreachable(); | |
| 61 | } | |
| 62 | ||
| 63 | static void machine_power_off(void) | |
| 64 | { | |
| 65 | local_irq_disable(); | |
| 66 | unreachable(); | |
| 67 | } | |
| 68 | ||
| 69 | static int __init mips_reboot_setup(void) | |
| 70 | { | |
| 71 | _machine_restart = machine_restart; | |
| 72 | _machine_halt = machine_halt; | |
| 73 | pm_power_off = machine_power_off; | |
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | arch_initcall(mips_reboot_setup); |