/**
* Set initial power button state.
*/
static void set_initial_pwrbtn_state(void)
{
uint32_t reset_flags = system_get_reset_flags();
if (system_jumped_to_this_image() &&
chipset_in_state(CHIPSET_STATE_ON)) {
/*
* Jumped to this image while the chipset was already on, so
* simply reflect the actual power button state.
*/
if (power_button_is_pressed()) {
CPRINTS("PB init-jumped-held");
set_pwrbtn_to_pch(0);
} else {
CPRINTS("PB init-jumped");
}
} else if ((reset_flags & RESET_FLAG_AP_OFF) ||
(keyboard_scan_get_boot_key() == BOOT_KEY_DOWN_ARROW)) {
/*
* Reset triggered by keyboard-controlled reset, and down-arrow
* was held down. Or reset flags request AP off.
*
* Leave the main processor off. This is a fail-safe
* combination for debugging failures booting the main
* processor.
*
* Don't let the PCH see that the power button was pressed.
* Otherwise, it might power on.
*/
CPRINTS("PB init-off");
power_button_pch_release();
} else {
/*
* All other EC reset conditions power on the main processor so
* it can verify the EC.
*/
#ifdef CONFIG_BRINGUP
CPRINTS("PB idle");
pwrbtn_state = PWRBTN_STATE_IDLE;
#else
CPRINTS("PB init-on");
pwrbtn_state = PWRBTN_STATE_INIT_ON;
#endif
}
}
enum power_state power_handle_state(enum power_state state)
{
/*
* Pass through RSMRST asynchronously, as PCH may not react
* immediately to power changes.
*/
int rsmrst_in = gpio_get_level(GPIO_RSMRST_L_PGOOD);
int rsmrst_out = gpio_get_level(GPIO_PCH_RSMRST_L);
#ifdef GLADOS_BOARD_V2
int tries = 0;
#endif
if (rsmrst_in != rsmrst_out) {
/*
* Wait at least 10ms between power signals going high
* and deasserting RSMRST to PCH.
*/
if (rsmrst_in)
msleep(10);
gpio_set_level(GPIO_PCH_RSMRST_L, rsmrst_in);
CPRINTS("RSMRST: %d", rsmrst_in);
}
switch (state) {
case POWER_G3:
if (forcing_shutdown) {
power_button_pch_release();
forcing_shutdown = 0;
}
break;
case POWER_S5:
if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 1)
return POWER_S5S3; /* Power up to next state */
break;
case POWER_S3:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S3S5;
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) {
/* Power up to next state */
return POWER_S3S0;
} else if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 0) {
/* Power down to next state */
return POWER_S3S5;
}
break;
case POWER_S0:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
chipset_force_shutdown();
return POWER_S0S3;
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) {
/* Power down to next state */
return POWER_S0S3;
}
break;
case POWER_G3S5:
/* Call hooks to initialize PMIC */
hook_notify(HOOK_CHIPSET_PRE_INIT);
if (power_wait_signals(IN_PCH_SLP_SUS_DEASSERTED)) {
chipset_force_shutdown();
return POWER_G3;
}
#ifdef GLADOS_BOARD_V2
/*
* Allow up to 1s for charger to be initialized, in case
* we're trying to boot the AP with no battery.
*/
while (charge_prevent_power_on() &&
tries++ < CHARGER_INITIALIZED_TRIES) {
msleep(CHARGER_INITIALIZED_DELAY_MS);
}
/* Return to G3 if battery level is too low */
if (charge_want_shutdown() ||
tries == CHARGER_INITIALIZED_TRIES) {
CPRINTS("power-up inhibited");
chipset_force_shutdown();
return POWER_G3;
}
/* Allow AP to power on */
gpio_set_level(GPIO_PMIC_SLP_SUS_L, 1);
gpio_set_level(GPIO_PCH_BATLOW_L, 1);
#endif
return POWER_S5;
case POWER_S5S3:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S5G3;
}
/* Enable TP + USB so that they can wake the system */
gpio_set_level(GPIO_ENABLE_TOUCHPAD, 1);
gpio_set_level(GPIO_USB1_ENABLE, 1);
gpio_set_level(GPIO_USB2_ENABLE, 1);
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_STARTUP);
return POWER_S3;
case POWER_S3S0:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S3S5;
}
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
/* Enable wireless */
wireless_set_state(WIRELESS_ON);
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_RESUME);
/*
* Disable idle task deep sleep. This means that the low
* power idle task will not go into deep sleep while in S0.
*/
disable_sleep(SLEEP_MASK_AP_RUN);
/*
* Throttle CPU if necessary. This should only be asserted
* when +VCCP is powered (it is by now).
*/
gpio_set_level(GPIO_CPU_PROCHOT, throttle_cpu);
return POWER_S0;
case POWER_S0S3:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SUSPEND);
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
/* Suspend wireless */
wireless_set_state(WIRELESS_SUSPEND);
/*
* Enable idle task deep sleep. Allow the low power idle task
* to go into deep sleep in S3 or lower.
*/
enable_sleep(SLEEP_MASK_AP_RUN);
return POWER_S3;
case POWER_S3S5:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SHUTDOWN);
/* Disable wireless */
wireless_set_state(WIRELESS_OFF);
gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0);
gpio_set_level(GPIO_USB1_ENABLE, 0);
gpio_set_level(GPIO_USB2_ENABLE, 0);
return POWER_S5G3;
case POWER_S5G3:
#ifdef CONFIG_G3_SLEEP
gpio_set_level(GPIO_G3_SLEEP_EN, 1);
#endif
chipset_force_g3();
return POWER_G3;
default:
break;
}
return state;
}
static enum power_state _power_handle_state(enum power_state state)
{
int tries = 0;
switch (state) {
case POWER_G3:
break;
case POWER_S5:
if (forcing_shutdown) {
power_button_pch_release();
forcing_shutdown = 0;
}
#ifdef CONFIG_BOARD_HAS_RTC_RESET
/* Wait for S5 exit and attempt RTC reset it supported */
if (power_s5_up)
return power_wait_s5_rtc_reset();
#endif
if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 1)
return POWER_S5S3; /* Power up to next state */
break;
case POWER_S3:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S3S5;
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) {
/* Power up to next state */
return POWER_S3S0;
} else if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 0) {
/* Power down to next state */
return POWER_S3S5;
}
break;
case POWER_S0:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
chipset_force_shutdown();
return POWER_S0S3;
#ifdef CONFIG_POWER_S0IX
} else if ((gpio_get_level(GPIO_PCH_SLP_S0_L) == 0) &&
(gpio_get_level(GPIO_PCH_SLP_S3_L) == 1)) {
return POWER_S0S0ix;
#endif
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) {
/* Power down to next state */
return POWER_S0S3;
}
break;
#ifdef CONFIG_POWER_S0IX
case POWER_S0ix:
/*
* TODO: add code for unexpected power loss
*/
if ((gpio_get_level(GPIO_PCH_SLP_S0_L) == 1) &&
(gpio_get_level(GPIO_PCH_SLP_S3_L) == 1)) {
return POWER_S0ixS0;
}
break;
#endif
case POWER_G3S5:
/* Call hooks to initialize PMIC */
hook_notify(HOOK_CHIPSET_PRE_INIT);
/*
* Allow up to 1s for charger to be initialized, in case
* we're trying to boot the AP with no battery.
*/
while (charge_prevent_power_on(0) &&
tries++ < CHARGER_INITIALIZED_TRIES) {
msleep(CHARGER_INITIALIZED_DELAY_MS);
}
/* Return to G3 if battery level is too low */
if (charge_want_shutdown() ||
tries > CHARGER_INITIALIZED_TRIES) {
CPRINTS("power-up inhibited");
chipset_force_shutdown();
return POWER_G3;
}
if (power_wait_signals(IN_PCH_SLP_SUS_DEASSERTED)) {
chipset_force_shutdown();
return POWER_G3;
}
power_s5_up = 1;
return POWER_S5;
case POWER_S5S3:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S5G3;
}
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_STARTUP);
return POWER_S3;
case POWER_S3S0:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S3S5;
}
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
/* Enable wireless */
wireless_set_state(WIRELESS_ON);
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_RESUME);
/*
* Disable idle task deep sleep. This means that the low
* power idle task will not go into deep sleep while in S0.
*/
disable_sleep(SLEEP_MASK_AP_RUN);
/*
* Throttle CPU if necessary. This should only be asserted
* when +VCCP is powered (it is by now).
*/
gpio_set_level(GPIO_CPU_PROCHOT, throttle_cpu);
return POWER_S0;
case POWER_S0S3:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SUSPEND);
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
/* Suspend wireless */
wireless_set_state(WIRELESS_SUSPEND);
/*
* Enable idle task deep sleep. Allow the low power idle task
* to go into deep sleep in S3 or lower.
*/
enable_sleep(SLEEP_MASK_AP_RUN);
return POWER_S3;
#ifdef CONFIG_POWER_S0IX
case POWER_S0S0ix:
/* call hooks before standby */
hook_notify(HOOK_CHIPSET_SUSPEND);
lpc_enable_wake_mask_for_lid_open();
/*
* Enable idle task deep sleep. Allow the low power idle task
* to go into deep sleep in S0ix.
*/
enable_sleep(SLEEP_MASK_AP_RUN);
return POWER_S0ix;
case POWER_S0ixS0:
lpc_disable_wake_mask_for_lid_open();
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_RESUME);
/*
* Disable idle task deep sleep. This means that the low
* power idle task will not go into deep sleep while in S0.
*/
disable_sleep(SLEEP_MASK_AP_RUN);
return POWER_S0;
#endif
case POWER_S3S5:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SHUTDOWN);
/* Disable wireless */
wireless_set_state(WIRELESS_OFF);
/* Always enter into S5 state. The S5 state is required to
* correctly handle global resets which have a bit of delay
* while the SLP_Sx_L signals are asserted then deasserted. */
power_s5_up = 0;
return POWER_S5;
case POWER_S5G3:
chipset_force_g3();
return POWER_G3;
default:
break;
}
return state;
}
