static int calc_next_state(int state)
{
struct batt_params batt;
int alarm;
battery_get_params_and_save_a_copy(&batt);
switch (state) {
case ST_IDLE0:
case ST_BAD_COND:
case ST_IDLE:
/* Check AC and chiset state */
if (!extpower_is_present()) {
if (chipset_in_state(CHIPSET_STATE_ON))
return ST_DISCHARGING;
return ST_IDLE;
}
/* Stay in idle mode if charger overtemp */
if (pmu_is_charger_alarm())
return ST_BAD_COND;
/* Enable charging when battery doesn't respond */
if (!(batt.flags & BATT_FLAG_RESPONSIVE))
return ST_PRE_CHARGING;
/* Turn off charger when battery temperature is out
* of the start charging range.
*/
if (!battery_start_charging_range(batt.temperature))
return ST_BAD_COND;
/* Turn off charger on battery over temperature alarm */
if (battery_status(&alarm) || (alarm & ALARM_OVER_TEMP))
return ST_BAD_COND;
/* Stop charging if the battery says it's charged */
if (alarm & ALARM_CHARGED)
return ST_IDLE;
/* Start charging only when battery charge lower than 100% */
if (!(batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE)) {
if (batt.state_of_charge < 100)
return ST_CHARGING;
}
return ST_IDLE;
case ST_PRE_CHARGING:
if (!extpower_is_present())
return ST_IDLE0;
/*
* If the battery goes online after enabling the charger, go
* into charging state.
*/
if (batt.flags & BATT_FLAG_RESPONSIVE) {
if (!battery_start_charging_range(batt.temperature))
return ST_IDLE0;
if (!(batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE)) {
if (batt.state_of_charge >= 100)
return ST_IDLE0;
}
return ST_CHARGING;
}
return ST_PRE_CHARGING;
case ST_CHARGING:
/* Go back to idle state when AC is unplugged */
if (!extpower_is_present())
return ST_IDLE0;
/*
* Disable charging on battery access error, or charging
* temperature out of range.
*/
if (!(batt.flags & BATT_FLAG_RESPONSIVE)) {
CPRINTS("pmu charging: unable to get battery "
"temperature");
return ST_IDLE0;
} else if (!battery_charging_range(batt.temperature)) {
CPRINTS("pmu charging: temperature out of range "
"%dC",
DECI_KELVIN_TO_CELSIUS(batt.temperature));
return ST_CHARGING_ERROR;
}
/*
* Disable charging on battery alarm events or access error:
* - over temperature
* - over current
*/
if (battery_status(&alarm))
return ST_IDLE0;
if (alarm & ALARM_OVER_TEMP) {
CPRINTS("pmu charging: battery over temp");
return ST_CHARGING_ERROR;
}
/* Go to idle state if battery is fully charged */
if (alarm & ALARM_CHARGED)
return ST_IDLE;
/*
* Disable charging on charger alarm events:
* - charger over current
* - charger over temperature
*/
if (pmu_is_charger_alarm()) {
CPRINTS("pmu charging: charger alarm");
return ST_IDLE0;
}
return ST_CHARGING;
case ST_CHARGING_ERROR:
/*
* This state indicates AC is plugged but the battery is not
* charging. The conditions to exit this state:
* - battery detected
* - battery temperature is in start charging range
* - no battery alarm
*/
if (extpower_is_present()) {
if (battery_status(&alarm))
return ST_CHARGING_ERROR;
if (alarm & ALARM_OVER_TEMP)
return ST_CHARGING_ERROR;
if (!(batt.flags & BATT_FLAG_RESPONSIVE))
return ST_CHARGING_ERROR;
if (!battery_charging_range(batt.temperature))
return ST_CHARGING_ERROR;
return ST_CHARGING;
}
return ST_IDLE0;
case ST_DISCHARGING:
/* Go back to idle state when AC is plugged */
if (extpower_is_present())
return ST_IDLE0;
/* Prepare EC sleep after system stopped discharging */
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
return ST_IDLE0;
/* Check battery discharging temperature range */
if (batt.flags & BATT_FLAG_RESPONSIVE) {
if (!battery_discharging_range(batt.temperature)) {
CPRINTS("pmu discharging: temperature out of "
"range %dC",
DECI_KELVIN_TO_CELSIUS(
batt.temperature));
return system_off();
}
}
/* Check discharging alarm */
if (!battery_status(&alarm) && (alarm & ALARM_DISCHARGING)) {
CPRINTS("pmu discharging: battery alarm %016b", alarm);
return system_off();
}
/* Check remaining charge % */
if (!(batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE)) {
/*
* Shutdown AP when state of charge < 1.5%.
* Moving average is rounded to integer.
*/
if (rsoc_moving_average(batt.state_of_charge) < 2)
return system_off();
else if (batt.state_of_charge < 4)
notify_battery_low();
}
return ST_DISCHARGING;
}
return ST_IDLE0;
}
static void button_long_push()
{
if(system_off) system_off();
}
