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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <common.h>
#include <command.h>
#include "include/wmt_pmc.h"
#include "include/common_def.h"
#define PMHC_HIBERNATE 0x205
void do_wmt_poweroff(void)
{
/*
* Set scratchpad to zero, just in case it is used as a restart
* address by the bootloader. Since PB_RESUME button has been
* set to be one of the wakeup sources, clean the resume address
* will cause zacboot to issue a SW_RESET, for design a behavior
* to let PB_RESUME button be a power on button.
*
* Also force to disable watchdog timer, if it has been enabled.
*/
HSP0_VAL = 0;
OSTW_VAL &= ~OSTW_WE;
/*
* Well, I cannot power-off myself,
* so try to enter power-off suspend mode.
*/
PMHC_VAL = PMHC_HIBERNATE;
/* Force ARM to idle mode*/
asm volatile("ldr r0, =0xD813004C\n\t"
"adr r1, .Cpu1_wfi\n\t"
"str r1, [r0]\n\t"
"sev\n\t"
"ldr r0, =0xD8018008 @SCU\n\t"
"ldr r1, =0x0303\n\t"
"str r1, [r0]\n\t"
"ldr r0, =0xD8130012\n\t"
"ldr r1, =0x205\n\t"
"strh r1, [r0]\n\t"
"wfi\n\t"
".Cpu1_wfi:\n\t"
"wfi\n\t"
"b .Cpu1_wfi\n\t"
);
}
U_BOOT_CMD(
poweroff, 1, 0, do_wmt_poweroff,
"poweroff - wmt device power off. \n",
"- wmt device power off.\n"
);
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