/**
* Common handler for steady states
*
* @param state Current power state
* @return Updated power state
*/
static enum power_state power_common_state(enum power_state state)
{
switch (state) {
case POWER_G3:
if (want_g3_exit) {
want_g3_exit = 0;
return POWER_G3S5;
}
in_want = 0;
#ifdef CONFIG_HIBERNATE
if (extpower_is_present())
task_wait_event(-1);
else {
uint64_t target_time;
uint64_t time_now = get_time().val;
uint32_t delay = hibernate_delay;
#ifdef CONFIG_HIBERNATE_BATT_PCT
if (charge_get_percent() <= CONFIG_HIBERNATE_BATT_PCT
&& CONFIG_HIBERNATE_BATT_SEC < delay)
delay = CONFIG_HIBERNATE_BATT_SEC;
#endif
target_time = last_shutdown_time + delay * 1000000ull;
if (time_now > target_time) {
/*
* Time's up. Hibernate until wake pin
* asserted.
*/
#ifdef CONFIG_LOW_POWER_PSEUDO_G3
enter_pseudo_g3();
#else
CPRINTS("hibernating");
system_hibernate(0, 0);
#endif
} else {
uint64_t wait = target_time - time_now;
if (wait > TASK_MAX_WAIT_US)
wait = TASK_MAX_WAIT_US;
/* Wait for a message */
task_wait_event(wait);
}
}
#else /* !CONFIG_HIBERNATE */
task_wait_event(-1);
#endif
break;
case POWER_S5:
/*
* If the power button is pressed before S5 inactivity timer
* expires, the timer will be cancelled and the task of the
* power state machine will be back here again. Since we are
* here, which means the system has been waiting for CPU
* starting up, we don't need want_g3_exit flag to be set
* anymore. Therefore, we can reset the flag here to prevent
* the situation that the flag is still set after S5 inactivity
* timer expires, which can cause the system to exit G3 again.
*/
want_g3_exit = 0;
/* Wait for inactivity timeout */
power_wait_signals(0);
if (task_wait_event(S5_INACTIVITY_TIMEOUT) ==
TASK_EVENT_TIMER) {
/* Prepare to drop to G3; wake not requested yet */
return POWER_S5G3;
}
break;
case POWER_S3:
/* Wait for a message */
power_wait_signals(0);
task_wait_event(-1);
break;
case POWER_S0:
/* Wait for a message */
power_wait_signals(0);
task_wait_event(-1);
break;
default:
/* No common functionality for transition states */
break;
}
return state;
}
/**
* Common handler for steady states
*
* @param state Current power state
* @return Updated power state
*/
static enum power_state power_common_state(enum power_state state)
{
switch (state) {
case POWER_G3:
if (want_g3_exit) {
want_g3_exit = 0;
return POWER_G3S5;
}
in_want = 0;
#ifdef CONFIG_HIBERNATE
if (extpower_is_present())
task_wait_event(-1);
else {
uint64_t target_time;
uint64_t time_now = get_time().val;
uint32_t delay = hibernate_delay;
#ifdef CONFIG_HIBERNATE_BATT_PCT
if (charge_get_percent() <= CONFIG_HIBERNATE_BATT_PCT
&& CONFIG_HIBERNATE_BATT_SEC < delay)
delay = CONFIG_HIBERNATE_BATT_SEC;
#endif
target_time = last_shutdown_time + delay * 1000000ull;
if (time_now > target_time) {
/*
* Time's up. Hibernate until wake pin
* asserted.
*/
#ifdef CONFIG_LOW_POWER_PSEUDO_G3
enter_pseudo_g3();
#else
CPRINTS("hibernating");
system_hibernate(0, 0);
#endif
} else {
uint64_t wait = target_time - time_now;
if (wait > TASK_MAX_WAIT_US)
wait = TASK_MAX_WAIT_US;
/* Wait for a message */
task_wait_event(wait);
}
}
#else /* !CONFIG_HIBERNATE */
task_wait_event(-1);
#endif
break;
case POWER_S5:
/* Wait for inactivity timeout */
power_wait_signals(0);
if (task_wait_event(S5_INACTIVITY_TIMEOUT) ==
TASK_EVENT_TIMER) {
/* Drop to G3; wake not requested yet */
want_g3_exit = 0;
return POWER_S5G3;
}
break;
case POWER_S3:
/* Wait for a message */
power_wait_signals(0);
task_wait_event(-1);
break;
case POWER_S0:
/* Wait for a message */
power_wait_signals(0);
task_wait_event(-1);
break;
default:
/* No common functionality for transition states */
break;
}
return state;
}
