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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <arch/gpio.h>
#include <arch/hlt.h>
#include <console/console.h>
#include <cpu/samsung/exynos5250/gpio.h>
#include <cpu/samsung/exynos5250/power.h>
#include <cpu/samsung/exynos5-common/exynos5-common.h>
#include "mainboard.h"
static int snow_wakeup_need_reset(void)
{
/* The "wake up" event is not reliable (known as "bad wakeup") and needs
* reset if GPIO value is high. */
return gpio_get_value(GPIO_Y10);
}
void snow_wakeup(void)
{
if (snow_wakeup_need_reset())
power_reset();
power_init(); /* Ensure ps_hold_setup() for early wakeup. */
power_exit_wakeup();
/* Should never return. */
die("Failed to wake up.\n");
}
int snow_get_wakeup_state()
{
uint32_t status = power_read_reset_status();
/* DIDLE/LPA can be resumed without clock reset (ex, bootblock),
* and SLEEP requires resetting clock (should be done in ROM stage).
*/
if (status == S5P_CHECK_DIDLE || status == S5P_CHECK_LPA)
return SNOW_WAKEUP_DIRECT;
if (status == S5P_CHECK_SLEEP)
return SNOW_WAKEUP_NEED_CLOCK_RESET;
return SNOW_IS_NOT_WAKEUP;
}
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