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https://github.com/Telecominfraproject/OpenCellular.git
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c51a8982ff
This reduces power consumption in S3/S5 because the EC doesn't need to poll the battery every 500ms. BUG=chrome-os-partner:9676 BRANCH=link TEST=manual As much as can be tested with the current debug information: - Boot system with AC adapter in. Charge state machine should go to charging state. - Remove AC adapter. Charge state -> discharging. - Shut system down. - Plug AC adapter in. Charge state -> init -> charging over the course of a few seconds (NOT a minute). - Remove AC adapter. Charge state -> discharging. Really good testing requires a source-level change. Hack in a line of debug output above task_wait_event(sleep_next) in charge_state_machine_task() which prints how long the charge state machine is sleeping. It should sleep for ~250ms when charging, ~500ms when discharging and the system is on, or ~60000ms when discharging and the system is off. (I did this when writing this change, but removed it because it clutters up the debug console output.) Change-Id: I7d3e291fbc40bfcc67d1fb4982d91f0e6bf2e785 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/33921 Reviewed-by: Bill Richardson <wfrichar@chromium.org> Reviewed-by: Rong Chang <rongchang@chromium.org>
126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/* Copyright (c) 2012 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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*/
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#include "timer.h"
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#ifndef __CROS_EC_CHARGE_STATE_H
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#define __CROS_EC_CHARGE_STATE_H
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/* Time constants */
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#define MSEC (1000ULL)
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#define SECOND (MSEC * 1000)
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#define MINUTE (SECOND * 60)
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#define HOUR (MINUTE * 60)
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/* Update period to prevent charger watchdog timeout */
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#define CHARGER_UPDATE_PERIOD (SECOND * 10)
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/* Power state task polling period in usec */
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#define POLL_PERIOD_VERY_LONG MINUTE
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#define POLL_PERIOD_LONG (MSEC * 500)
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#define POLL_PERIOD_CHARGE (MSEC * 250)
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#define POLL_PERIOD_SHORT (MSEC * 100)
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#define MIN_SLEEP_USEC (MSEC * 50)
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#define MAX_SLEEP_USEC SECOND
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/* Power state error flags */
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#define F_CHARGER_INIT (1 << 0) /* Charger initialization */
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#define F_CHARGER_VOLTAGE (1 << 1) /* Charger maximun output voltage */
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#define F_CHARGER_CURRENT (1 << 2) /* Charger maximum output current */
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#define F_BATTERY_VOLTAGE (1 << 3) /* Battery voltage */
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#define F_BATTERY_CURRENT (1 << 4) /* Battery charging current */
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#define F_DESIRED_VOLTAGE (1 << 5) /* Battery desired voltage */
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#define F_DESIRED_CURRENT (1 << 6) /* Battery desired current */
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#define F_BATTERY_TEMPERATURE (1 << 7) /* Battery temperature */
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#define F_BATTERY_MODE (1 << 8) /* Battery mode */
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#define F_BATTERY_CAPACITY (1 << 9) /* Battery capacity */
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#define F_BATTERY_STATE_OF_CHARGE (1 << 10) /* State of charge, percentage */
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#define F_BATTERY_MASK (F_BATTERY_VOLTAGE | F_BATTERY_CURRENT | \
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F_DESIRED_VOLTAGE | F_DESIRED_CURRENT | \
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F_BATTERY_TEMPERATURE | F_BATTERY_MODE | \
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F_BATTERY_CAPACITY | F_BATTERY_STATE_OF_CHARGE)
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#define F_CHARGER_MASK (F_CHARGER_VOLTAGE | F_CHARGER_CURRENT | \
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F_CHARGER_INIT)
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/* Power states */
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enum power_state {
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PWR_STATE_UNCHANGE = 0,
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PWR_STATE_INIT,
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PWR_STATE_IDLE,
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PWR_STATE_DISCHARGE,
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PWR_STATE_CHARGE,
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PWR_STATE_ERROR
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};
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/* Debugging constants, in the same order as enum power_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 POWER_STATE_NAME_TABLE \
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{ \
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"unchange", \
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"init", \
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"idle", \
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"discharge", \
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"charge", \
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"error" \
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}
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/* End of POWER_STATE_NAME_TABLE macro */
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/* Power state data
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* Status collection of charging state machine.
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*/
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struct power_state_data {
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int ac;
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int charging_voltage;
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int charging_current;
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struct batt_params batt;
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enum power_state state;
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uint32_t error;
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timestamp_t ts;
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};
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/* State context
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* The shared context for state handler. The context contains current and
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* previous state.
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*/
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struct power_state_context {
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struct power_state_data curr;
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struct power_state_data prev;
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uint32_t *memmap_batt_volt;
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/* TODO(rong): check endianness of EC and memmap*/
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uint32_t *memmap_batt_rate;
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uint32_t *memmap_batt_cap;
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uint8_t *memmap_batt_flags;
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/* Charger and battery pack info */
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const struct charger_info *charger;
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const struct battery_info *battery;
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/* Charging timestamps */
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timestamp_t charger_update_time;
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timestamp_t trickle_charging_time;
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timestamp_t voltage_debounce_time;
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};
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/* Trickle charging state handler.
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* Trickle charging state is sub-state of charging. Normal charging handler
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* can not set battery input current cap to a very low value. This function
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* uses charging voltage to control battery input current.
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*/
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enum power_state trickle_charge(struct power_state_context *ctx);
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/**
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* Return current charge state.
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*/
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enum power_state charge_get_state(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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#endif /* __CROS_EC_CHARGE_STATE_H */
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