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a7bae3588c
Allow CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON to be defined at the board level to be the minimum battery percentage required for power-on. If the battery level is below the threshold, or if the battery is missing, power button presses will be ignored. BUG=chrome-os-partner:31127 TEST=Manual on Samus with subsequent commit. Verify that AP continues to boot normally when charge level exceeds CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON. Verify that power button presses are ignored when the charge level is below the threshold, and we return to G3. BRANCH=Samus Change-Id: I0ff3f7ddabf38080332470e172c8b2e307bf1655 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/236021 Reviewed-by: Alec Berg <alecaberg@chromium.org>
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/* Copyright (c) 2014 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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#ifndef __CROS_EC_CHARGE_STATE_H
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#define __CROS_EC_CHARGE_STATE_H
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#include "common.h"
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#include "timer.h"
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/* Stuff that's common to all charger implementations can go here. */
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/* Seconds after AP battery shutdown warning before we kill the AP */
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#define LOW_BATTERY_SHUTDOWN_TIMEOUT 30
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#define HIGH_TEMP_SHUTDOWN_TIMEOUT 30
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/* Seconds to spend trying to wake a non-responsive battery */
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#define PRECHARGE_TIMEOUT 30
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/* Power state task polling periods in usec */
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#define CHARGE_POLL_PERIOD_VERY_LONG MINUTE
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#define CHARGE_POLL_PERIOD_LONG (MSEC * 500)
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#define CHARGE_POLL_PERIOD_CHARGE (MSEC * 250)
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#define CHARGE_POLL_PERIOD_SHORT (MSEC * 100)
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#define CHARGE_MIN_SLEEP_USEC (MSEC * 50)
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#define CHARGE_MAX_SLEEP_USEC SECOND
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/* Power states */
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enum charge_state {
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/* Meta-state; unchanged from previous time through task loop */
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PWR_STATE_UNCHANGE = 0,
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/* Initializing charge state machine at boot */
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PWR_STATE_INIT,
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/* Re-initializing charge state machine */
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PWR_STATE_REINIT,
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/* Just transitioned from init to idle */
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PWR_STATE_IDLE0,
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/* Idle; AC present */
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PWR_STATE_IDLE,
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/* Discharging */
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PWR_STATE_DISCHARGE,
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/* Charging */
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PWR_STATE_CHARGE,
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/* Charging, almost fully charged */
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PWR_STATE_CHARGE_NEAR_FULL,
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/* Charging state machine error */
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PWR_STATE_ERROR
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};
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/* Charge state flags */
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/* Forcing idle state */
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#define CHARGE_FLAG_FORCE_IDLE (1 << 0)
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/* External (AC) power is present */
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#define CHARGE_FLAG_EXTERNAL_POWER (1 << 1)
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/* Battery is responsive */
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#define CHARGE_FLAG_BATT_RESPONSIVE (1 << 2)
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/* Debugging constants, in the same order as enum charge_state. This string
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* table was moved here to sync with enum above.
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*/
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#define CHARGE_STATE_NAME_TABLE { \
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"unchange", \
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"init", \
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"reinit", \
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"idle0", \
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"idle", \
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"discharge", \
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"charge", \
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"charge_near_full", \
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"error" \
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}
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/* End of CHARGE_STATE_NAME_TABLE macro */
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/**
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* Return current charge state.
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*/
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enum charge_state charge_get_state(void);
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/**
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* Return non-zero if battery is so low we want to keep AP off.
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*/
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int charge_keep_power_off(void);
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/**
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* Return current charge state flags (CHARGE_FLAG_*)
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*/
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uint32_t charge_get_flags(void);
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/**
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* Return current battery charge percentage.
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*/
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int charge_get_percent(void);
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/**
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* Return non-zero if discharging and battery so low we should shut down.
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*/
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int charge_want_shutdown(void);
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/**
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* Return non-zero if the battery level is too low to allow power on, even if
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* a charger is attached.
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*/
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int charge_prevent_power_on(void);
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/**
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* Get the last polled battery/charger temperature.
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*
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* @param idx Sensor index to read.
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* @param temp_ptr Destination for temperature in K.
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*
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* @return EC_SUCCESS if successful, non-zero if error.
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*/
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int charge_temp_sensor_get_val(int idx, int *temp_ptr);
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/**
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* Get the pointer to the battery parameters we saved in charge state.
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*
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* Use this carefully. Other threads can modify data while you are reading.
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*/
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const struct batt_params *charger_current_battery_params(void);
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/* Pick the right implementation */
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#ifdef CONFIG_CHARGER_V1
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#ifdef CONFIG_CHARGER_V2
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#error "Choose either CONFIG_CHARGER_V1 or CONFIG_CHARGER_V2, not both"
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#else
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#include "charge_state_v1.h"
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#endif
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#else /* not V1 */
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#ifdef CONFIG_CHARGER_V2
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#include "charge_state_v2.h"
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#endif
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#endif /* CONFIG_CHARGER_V1 */
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#endif /* __CROS_EC_CHARGE_STATE_H */
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