static void chipset_turn_off_power_rails(void)
{
/* Release the power on pin, if it was asserted */
set_pmic_pwron(0);
/* Close the pmic power source immediately */
set_pmic_source(0);
/* Keep AP and PMIC in reset the whole time */
set_pmic_warm_reset(1);
}
/**
* Power on the AP
*/
static void power_on(void)
{
int i;
set_pmic_source(1);
usleep(PMIC_SOURCE_STARTUP_TIME);
set_pmic_pwron(1);
/*
* BUG Workaround(crosbug.com/p/31635): usleep hangs in task when using
* big delays.
*/
for (i = 0; i < PMIC_STARTUP_MS; i++)
usleep(1 * MSEC);
set_pmic_warm_reset(0);
}
/**
* Power on the AP
*/
static void power_on(void)
{
int i;
set_pmic_source(1);
usleep(PMIC_SOURCE_STARTUP_TIME);
set_pmic_pwron(1);
/*
* BUG Workaround(crosbug.com/p/31635): usleep hangs in task when using
* big delays.
*/
for (i = 0; i < PMIC_STARTUP_MS; i++)
usleep(1 * MSEC);
/* Reset the PMIC to make sure it's in a known state. */
set_pmic_reset(1);
usleep(PMIC_RESET_HOLD_TIME);
set_pmic_reset(0);
set_pmic_warm_reset(0);
}
enum power_state power_handle_state(enum power_state state)
{
int value;
static int boot_from_g3;
switch (state) {
case POWER_G3:
boot_from_g3 = check_for_power_on_event();
if (boot_from_g3)
return POWER_G3S5;
break;
case POWER_G3S5:
return POWER_S5;
case POWER_S5:
if (boot_from_g3) {
value = boot_from_g3;
boot_from_g3 = 0;
} else {
value = check_for_power_on_event();
}
if (value) {
CPRINTS("power on %d", value);
return POWER_S5S3;
}
return state;
case POWER_S5S3:
hook_notify(HOOK_CHIPSET_PRE_INIT);
power_on();
disable_sleep(SLEEP_MASK_AP_RUN);
powerled_set_state(POWERLED_STATE_ON);
if (power_wait_signals(IN_POWER_GOOD) == EC_SUCCESS) {
CPRINTS("POWER_GOOD seen");
if (power_button_wait_for_release(
DELAY_SHUTDOWN_ON_POWER_HOLD) ==
EC_SUCCESS) {
power_button_was_pressed = 0;
set_pmic_pwron(0);
/* setup misc gpio for S3/S0 functionality */
gpio_set_flags(GPIO_SUSPEND_L, GPIO_INPUT
| GPIO_INT_BOTH | GPIO_PULL_DOWN);
gpio_set_flags(GPIO_EC_INT_L, GPIO_OUTPUT
| GPIO_OUT_HIGH);
/* Call hooks now that AP is running */
hook_notify(HOOK_CHIPSET_STARTUP);
return POWER_S3;
} else {
CPRINTS("long-press button, shutdown");
power_off();
/*
* Since the AP may be up already, return S0S3
* state to go through the suspend hook.
*/
return POWER_S0S3;
}
} else {
CPRINTS("POWER_GOOD not seen in time");
}
chipset_turn_off_power_rails();
return POWER_S5;
case POWER_S3:
if (!(power_get_signals() & IN_POWER_GOOD))
return POWER_S3S5;
else if (!(power_get_signals() & IN_SUSPEND))
return POWER_S3S0;
return state;
case POWER_S3S0:
powerled_set_state(POWERLED_STATE_ON);
hook_notify(HOOK_CHIPSET_RESUME);
return POWER_S0;
case POWER_S0:
value = check_for_power_off_event();
if (value) {
CPRINTS("power off %d", value);
power_off();
return POWER_S0S3;
} else if (power_get_signals() & IN_SUSPEND)
return POWER_S0S3;
return state;
case POWER_S0S3:
if (lid_is_open())
powerled_set_state(POWERLED_STATE_SUSPEND);
else
powerled_set_state(POWERLED_STATE_OFF);
/* Call hooks here since we don't know it prior to AP suspend */
hook_notify(HOOK_CHIPSET_SUSPEND);
return POWER_S3;
case POWER_S3S5:
power_button_wait_for_release(-1);
power_button_was_pressed = 0;
return POWER_S5;
case POWER_S5G3:
return POWER_G3;
}
return state;
}
