Esempio n. 1
0
static void set_pwrbtn_to_pch(int high)
{
	/*
	 * If the battery is discharging and low enough we'd shut down the
	 * system, don't press the power button. Also, don't press the
	 * power button if the battery is charging but the battery level
	 * is too low.
	 */
#ifdef CONFIG_CHARGER
	if (chipset_in_state(CHIPSET_STATE_ANY_OFF) && !high &&
	   (charge_want_shutdown() || charge_prevent_power_on())) {
		CPRINTS("PB PCH pwrbtn ignored due to battery level");
		high = 1;
	}
#endif
	CPRINTS("PB PCH pwrbtn=%s", high ? "HIGH" : "LOW");
	gpio_set_level(GPIO_PCH_PWRBTN_L, high);
}
Esempio n. 2
0
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;
}
Esempio n. 3
0
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;
}