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1484116cb0
We don't have available GPIO pin for power button as the hibernate (stand-by) wake-up source. Also, we don't want to do board change. So, put the EC in a decent infinite loop to pretend the hibernate mode and wait for particular wake-up event. This should be fine because the AP is already down before EC hibernates. BUG=chrome-os-partner:25435 BRANCH=Nyan TEST=see comment #6 of issue for detailed test steps. Change-Id: I2cae131789f9ca5808b60d5f2495222ca9016e7c Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/186061 Reviewed-by: Randall Spangler <rspangler@chromium.org>
107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Common power interface for all chipsets */
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#ifndef __CROS_EC_POWER_H
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#define __CROS_EC_POWER_H
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#include "common.h"
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#include "gpio.h"
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enum power_state {
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/* Steady states */
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POWER_G3 = 0, /*
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* System is off (not technically all the way into G3,
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* which means totally unpowered...)
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*/
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POWER_S5, /* System is soft-off */
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POWER_S3, /* Suspend; RAM on, processor is asleep */
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POWER_S0, /* System is on */
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/* Transitions */
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POWER_G3S5, /* G3 -> S5 (at system init time) */
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POWER_S5S3, /* S5 -> S3 */
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POWER_S3S0, /* S3 -> S0 */
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POWER_S0S3, /* S0 -> S3 */
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POWER_S3S5, /* S3 -> S5 */
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POWER_S5G3, /* S5 -> G3 */
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};
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/* Information on an power signal */
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struct power_signal_info {
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enum gpio_signal gpio; /* GPIO for signal */
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int level; /* GPIO level which sets signal bit */
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const char *name; /* Name of signal */
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};
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/*
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* Each board must provide its signal list and a corresponding enum
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* power_signal.
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*/
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extern const struct power_signal_info power_signal_list[];
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/* Convert enum power_signal to a mask for signal functions */
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#define POWER_SIGNAL_MASK(signal) (1 << (signal))
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/**
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* Return current input signal state (one or more POWER_SIGNAL_MASK()s).
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*/
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uint32_t power_get_signals(void);
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/**
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* Check for required inputs
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*
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* @param want Mask of signals which must be present (one or more
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* POWER_SIGNAL_MASK()s).
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*
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* @return Non-zero if all present; zero if a required signal is missing.
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*/
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int power_has_signals(uint32_t want);
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/**
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* Wait for power input signals to be present
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*
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* @param want Mask of signals which must be present (one or more
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* POWER_SIGNAL_MASK()s). If want=0, stops waiting for
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* signals.
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* @return EC_SUCCESS when all inputs are present, or ERROR_TIMEOUT if timeout
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* before reaching the desired state.
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*/
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int power_wait_signals(uint32_t want);
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/**
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* Set the low-level power chipset state.
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*
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* @param new_state New chipset state.
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*/
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void power_set_state(enum power_state new_state);
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/**
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* Chipset-specific initialization
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*
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* @return The state the chipset should start in. Usually POWER_G3, but may
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* be POWER_G0 if the chipset was already on and we've jumped to this image.
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*/
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enum power_state power_chipset_init(void);
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/**
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* Chipset-specific state handler
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*
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* @return The updated state for the chipset.
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*/
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enum power_state power_handle_state(enum power_state state);
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/**
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* Interrupt handler for power signal GPIOs.
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*/
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#ifdef HAS_TASK_CHIPSET
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void power_signal_interrupt(enum gpio_signal signal);
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#else
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#define power_signal_interrupt NULL
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#endif
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#endif /* __CROS_EC_POWER_H */
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