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