static int battery_discharging_range(int deci_k)
{
	int8_t temp_c = DECI_KELVIN_TO_CELSIUS(deci_k);
	const struct battery_info *info = battery_get_info();

	return (temp_c >= info->discharging_min_c &&
		temp_c < info->discharging_max_c);
}
Esempio n. 2
0
int charge_temp_sensor_get_val(int idx, int *temp_ptr)
{
	const struct batt_params *batt = &task_ctx.curr.batt;

	if (!(batt->flags & BATT_FLAG_RESPONSIVE))
		return EC_ERROR_UNKNOWN;

	*temp_ptr = C_TO_K(DECI_KELVIN_TO_CELSIUS(batt->temperature));
	return EC_SUCCESS;
}
Esempio n. 3
0
/*
 * Send host event to the AP if the battery is temperature or charge level
 * is critical. Force-shutdown if the problem isn't corrected after timeout.
 */
static void shutdown_on_critical_battery(void)
{
	int batt_temp_c;
	int battery_critical = 0;

	/*
	 * TODO(crosbug.com/p/27642): The thermal loop should watch the battery
	 * temp, so it can turn fans on.
	 */
	batt_temp_c = DECI_KELVIN_TO_CELSIUS(curr.batt.temperature);
	if (battery_too_hot(batt_temp_c)) {
		CPRINTS("Batt temp out of range: %dC", batt_temp_c);
		battery_critical = 1;
	}

	if (battery_too_low() && !curr.batt_is_charging) {
		CPRINTS("Low battery: %d%%, %dmV",
			curr.batt.state_of_charge, curr.batt.voltage);
		battery_critical = 1;
	}

	if (!battery_critical) {
		/* Reset shutdown warning time */
		shutdown_warning_time.val = 0;
		return;
	}

	if (!shutdown_warning_time.val) {
		CPRINTS("charge warn shutdown due to critical battery");
		shutdown_warning_time = get_time();
		if (!chipset_in_state(CHIPSET_STATE_ANY_OFF))
			host_set_single_event(EC_HOST_EVENT_BATTERY_SHUTDOWN);
	} else if (get_time().val > shutdown_warning_time.val +
		   CRITICAL_BATTERY_SHUTDOWN_TIMEOUT_US) {
		if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
#ifdef CONFIG_HIBERNATE
			/* Timeout waiting for charger to provide more power */
			CPRINTS(
			  "charge force EC hibernate due to critical battery");
			system_hibernate(0, 0);
#elif defined(CONFIG_BATTERY_CRITICAL_SHUTDOWN_CUT_OFF)
			CPRINTS(
			  "charge force battery cut-off due to critical level");
			board_cut_off_battery();
#endif
		} else {
			/* Timeout waiting for AP to shut down, so kill it */
			CPRINTS(
			  "charge force shutdown due to critical battery");
			chipset_force_shutdown();
		}
	}
}
Esempio n. 4
0
/**
 * Discharge state handler
 *
 *	- detect ac status
 *	- new state: INIT
 */
static enum charge_state state_discharge(struct charge_state_context *ctx)
{
	struct batt_params *batt = &ctx->curr.batt;
	int8_t bat_temp_c = DECI_KELVIN_TO_CELSIUS(batt->temperature);
	if (ctx->curr.ac)
		return PWR_STATE_REINIT;

	if (ctx->curr.error)
		return PWR_STATE_ERROR;

	/* Handle overtemp in discharging state by powering off host */
	if ((bat_temp_c >= ctx->battery->discharging_max_c ||
	     bat_temp_c < ctx->battery->discharging_min_c) &&
	    chipset_in_state(CHIPSET_STATE_ON)) {
		CPRINTS("charge force shutdown due to battery temp");
		chipset_force_shutdown();
		host_set_single_event(EC_HOST_EVENT_BATTERY_SHUTDOWN);
	}
	return PWR_STATE_UNCHANGE;
}
Esempio n. 5
0
static int acpi_thermal_add(struct acpi_device *device)
{
	int result = 0;
	struct acpi_thermal *tz = NULL;


	if (!device)
		return -EINVAL;

	tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
	if (!tz)
		return -ENOMEM;

	tz->device = device;
	strcpy(tz->name, device->pnp.bus_id);
	strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
	strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
	device->driver_data = tz;

	result = acpi_thermal_get_info(tz);
	if (result)
		goto free_memory;

	acpi_thermal_guess_offset(tz);

	result = acpi_thermal_register_thermal_zone(tz);
	if (result)
		goto free_memory;

	INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn);

	pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device),
		acpi_device_bid(device), DECI_KELVIN_TO_CELSIUS(tz->temperature));
	goto end;

free_memory:
	kfree(tz);
end:
	return result;
}
Esempio n. 6
0
static void dump_charge_state(void)
{
#define DUMP(FLD, FMT) ccprintf(#FLD " = " FMT "\n", curr.FLD)
#define DUMP_CHG(FLD, FMT) ccprintf("\t" #FLD " = " FMT "\n", curr.chg. FLD)
#define DUMP_BATT(FLD, FMT) ccprintf("\t" #FLD " = " FMT "\n", curr.batt. FLD)
	ccprintf("state = %s\n", state_list[curr.state]);
	DUMP(ac, "%d");
	DUMP(batt_is_charging, "%d");
	ccprintf("chg.*:\n");
	DUMP_CHG(voltage, "%dmV");
	DUMP_CHG(current, "%dmA");
	DUMP_CHG(input_current, "%dmA");
	DUMP_CHG(status, "0x%x");
	DUMP_CHG(option, "0x%x");
	DUMP_CHG(flags, "0x%x");
	ccprintf("batt.*:\n");
	ccprintf("\ttemperature = %dC\n",
		 DECI_KELVIN_TO_CELSIUS(curr.batt.temperature));
	DUMP_BATT(state_of_charge, "%d%%");
	DUMP_BATT(voltage, "%dmV");
	DUMP_BATT(current, "%dmA");
	DUMP_BATT(desired_voltage, "%dmV");
	DUMP_BATT(desired_current, "%dmA");
	DUMP_BATT(flags, "0x%x");
	DUMP_BATT(remaining_capacity, "%dmAh");
	DUMP_BATT(full_capacity, "%dmAh");
	ccprintf("\tis_present = %s\n", batt_pres[curr.batt.is_present]);
	DUMP(requested_voltage, "%dmV");
	DUMP(requested_current, "%dmA");
	ccprintf("chg_ctl_mode = %d\n", chg_ctl_mode);
	ccprintf("manual_mode = %d\n", manual_mode);
	ccprintf("user_current_limit = %dmA\n", user_current_limit);
	ccprintf("battery_seems_to_be_dead = %d\n", battery_seems_to_be_dead);
	ccprintf("battery_seems_to_be_disconnected = %d\n",
		 battery_seems_to_be_disconnected);
	ccprintf("battery_was_removed = %d\n", battery_was_removed);
	ccprintf("debug output = %s\n", debugging ? "on" : "off");
#undef DUMP
}
Esempio n. 7
0
/* Main loop */
void charger_task(void)
{
	int sleep_usec;
	int need_static = 1;
	const struct charger_info * const info = charger_get_info();

	/* Get the battery-specific values */
	batt_info = battery_get_info();

	prev_ac = prev_charge = -1;
	chg_ctl_mode = CHARGE_CONTROL_NORMAL;
	shutdown_warning_time.val = 0UL;
	battery_seems_to_be_dead = 0;

	/*
	 * If system is not locked and we don't have a battery to live on,
	 * then use max input current limit so that we can pull as much power
	 * as needed.
	 */
	battery_get_params(&curr.batt);
	prev_bp = curr.batt.is_present;
	curr.desired_input_current = get_desired_input_current(prev_bp, info);

	while (1) {

#ifdef CONFIG_SB_FIRMWARE_UPDATE
		if (sb_fw_update_in_progress()) {
			task_wait_event(CHARGE_MAX_SLEEP_USEC);
			continue;
		}
#endif

		/* Let's see what's going on... */
		curr.ts = get_time();
		sleep_usec = 0;
		problems_exist = 0;
		curr.ac = extpower_is_present();
		if (curr.ac != prev_ac) {
			if (curr.ac) {
				/*
				 * Some chargers are unpowered when the AC is
				 * off, so we'll reinitialize it when AC
				 * comes back and set the input current limit.
				 * Try again if it fails.
				 */
				int rv = charger_post_init();
				if (rv != EC_SUCCESS) {
					problem(PR_POST_INIT, rv);
				} else {
					if (curr.desired_input_current !=
					    CHARGE_CURRENT_UNINITIALIZED)
						rv = charger_set_input_current(
						    curr.desired_input_current);
					if (rv != EC_SUCCESS)
						problem(PR_SET_INPUT_CURR, rv);
					else
						prev_ac = curr.ac;
				}
			} else {
				/* Some things are only meaningful on AC */
				chg_ctl_mode = CHARGE_CONTROL_NORMAL;
				battery_seems_to_be_dead = 0;
				prev_ac = curr.ac;
			}
		}
		charger_get_params(&curr.chg);
		battery_get_params(&curr.batt);

		if (prev_bp != curr.batt.is_present) {
			prev_bp = curr.batt.is_present;

			/* Update battery info due to change of battery */
			batt_info = battery_get_info();
			need_static = 1;

			curr.desired_input_current =
				get_desired_input_current(prev_bp, info);
			if (curr.desired_input_current !=
			    CHARGE_CURRENT_UNINITIALIZED)
				charger_set_input_current(
					curr.desired_input_current);
			hook_notify(HOOK_BATTERY_SOC_CHANGE);
		}

		/*
		 * TODO(crosbug.com/p/27527). Sometimes the battery thinks its
		 * temperature is 6280C, which seems a bit high. Let's ignore
		 * anything above the boiling point of tungsten until this bug
		 * is fixed. If the battery is really that warm, we probably
		 * have more urgent problems.
		 */
		if (curr.batt.temperature > CELSIUS_TO_DECI_KELVIN(5660)) {
			CPRINTS("ignoring ridiculous batt.temp of %dC",
				 DECI_KELVIN_TO_CELSIUS(curr.batt.temperature));
			curr.batt.flags |= BATT_FLAG_BAD_TEMPERATURE;
		}

		/* If the battery thinks it's above 100%, don't believe it */
		if (curr.batt.state_of_charge > 100) {
			CPRINTS("ignoring ridiculous batt.soc of %d%%",
				curr.batt.state_of_charge);
			curr.batt.flags |= BATT_FLAG_BAD_STATE_OF_CHARGE;
		}

		/*
		 * Now decide what we want to do about it. We'll normally just
		 * pass along whatever the battery wants to the charger. Note
		 * that if battery_get_params() can't get valid values from the
		 * battery it uses (0, 0), which is probably safer than blindly
		 * applying power to a battery we can't talk to.
		 */
		curr.requested_voltage = curr.batt.desired_voltage;
		curr.requested_current = curr.batt.desired_current;

		/* If we *know* there's no battery, wait for one to appear. */
		if (curr.batt.is_present == BP_NO) {
			ASSERT(curr.ac);	/* How are we running? */
			curr.state = ST_IDLE;
			curr.batt_is_charging = 0;
			battery_was_removed = 1;
			goto wait_for_it;
		}

		/*
		 * If we had trouble talking to the battery or the charger, we
		 * should probably do nothing for a bit, and if it doesn't get
		 * better then flag it as an error.
		 */
		if (curr.chg.flags & CHG_FLAG_BAD_ANY)
			problem(PR_CHG_FLAGS, curr.chg.flags);
		if (curr.batt.flags & BATT_FLAG_BAD_ANY)
			problem(PR_BATT_FLAGS, curr.batt.flags);

		/*
		 * If AC is present, check if input current is sufficient to
		 * actually charge battery.
		 */
		curr.batt_is_charging = curr.ac && (curr.batt.current >= 0);

		/* Don't let the battery hurt itself. */
		shutdown_on_critical_battery();

		if (!curr.ac) {
			curr.state = ST_DISCHARGE;
			goto wait_for_it;
		}

		/* Okay, we're on AC and we should have a battery. */

		/* Used for factory tests. */
		if (chg_ctl_mode != CHARGE_CONTROL_NORMAL) {
			curr.state = ST_IDLE;
			goto wait_for_it;
		}

		/* If the battery is not responsive, try to wake it up. */
		if (!(curr.batt.flags & BATT_FLAG_RESPONSIVE)) {
			if (battery_seems_to_be_dead || battery_is_cut_off()) {
				/* It's dead, do nothing */
				curr.state = ST_IDLE;
				curr.requested_voltage = 0;
				curr.requested_current = 0;
			} else if (curr.state == ST_PRECHARGE &&
				   (get_time().val > precharge_start_time.val +
				    PRECHARGE_TIMEOUT_US)) {
				/* We've tried long enough, give up */
				CPRINTS("battery seems to be dead");
				battery_seems_to_be_dead = 1;
				curr.state = ST_IDLE;
				curr.requested_voltage = 0;
				curr.requested_current = 0;
			} else {
				/* See if we can wake it up */
				if (curr.state != ST_PRECHARGE) {
					CPRINTS("try to wake battery");
					precharge_start_time = get_time();
					need_static = 1;
				}
				curr.state = ST_PRECHARGE;
				curr.requested_voltage =
					batt_info->voltage_max;
				curr.requested_current =
					batt_info->precharge_current;
			}
			goto wait_for_it;
		} else {
			/* The battery is responding. Yay. Try to use it. */
#ifdef CONFIG_BATTERY_REQUESTS_NIL_WHEN_DEAD
			/*
			 * TODO (crosbug.com/p/29467): remove this workaround
			 * for dead battery that requests no voltage/current
			 */
			if (curr.requested_voltage == 0 &&
			    curr.requested_current == 0 &&
			    curr.batt.state_of_charge == 0) {
				/* Battery is dead, give precharge current */
				curr.requested_voltage =
					batt_info->voltage_max;
				curr.requested_current =
					batt_info->precharge_current;
			} else
#endif
#ifdef CONFIG_BATTERY_REVIVE_DISCONNECT
			battery_seems_to_be_disconnected = 0;

			if (curr.requested_voltage == 0 &&
			    curr.requested_current == 0 &&
			    battery_get_disconnect_state() ==
			    BATTERY_DISCONNECTED) {
				/*
				 * Battery is in disconnect state. Apply a
				 * current to kick it out of this state.
				 */
				CPRINTS("found battery in disconnect state");
				curr.requested_voltage =
					batt_info->voltage_max;
				curr.requested_current =
					batt_info->precharge_current;
				battery_seems_to_be_disconnected = 1;
			} else
#endif
			if (curr.state == ST_PRECHARGE ||
			    battery_seems_to_be_dead ||
			    battery_was_removed) {
				CPRINTS("battery woke up");

				/* Update the battery-specific values */
				batt_info = battery_get_info();
				need_static = 1;
			    }

			battery_seems_to_be_dead = battery_was_removed = 0;
			curr.state = ST_CHARGE;
		}

		/*
		 * TODO(crosbug.com/p/27643): Quit trying if charging too long
		 * without getting full (CONFIG_CHARGER_TIMEOUT_HOURS).
		 */

wait_for_it:
#ifdef CONFIG_CHARGER_PROFILE_OVERRIDE
		sleep_usec = charger_profile_override(&curr);
		if (sleep_usec < 0)
			problem(PR_CUSTOM, sleep_usec);
#endif

		/* Keep the AP informed */
		if (need_static)
			need_static = update_static_battery_info();
		/* Wait on the dynamic info until the static info is good. */
		if (!need_static)
			update_dynamic_battery_info();
		notify_host_of_low_battery();

		/* And the EC console */
		is_full = calc_is_full();
		if ((!(curr.batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE) &&
		    curr.batt.state_of_charge != prev_charge) ||
		    (is_full != prev_full)) {
			show_charging_progress();
			prev_charge = curr.batt.state_of_charge;
			hook_notify(HOOK_BATTERY_SOC_CHANGE);
		}
		prev_full = is_full;

		/* Turn charger off if it's not needed */
		if (curr.state == ST_IDLE || curr.state == ST_DISCHARGE) {
			curr.requested_voltage = 0;
			curr.requested_current = 0;
		}

		/* Apply external limits */
		if (curr.requested_current > user_current_limit)
			curr.requested_current = user_current_limit;

		/* Round to valid values */
		curr.requested_voltage =
			charger_closest_voltage(curr.requested_voltage);
		curr.requested_current =
			charger_closest_current(curr.requested_current);

		/* Charger only accpets request when AC is on. */
		if (curr.ac) {
			/*
			 * Some batteries would wake up after cut-off if we keep
			 * charging it. Thus, we only charge when AC is on and
			 * battery is not cut off yet.
			 */
			if (battery_is_cut_off())
				charge_request(0, 0);
			/*
			 * As a safety feature, some chargers will stop
			 * charging if we don't communicate with it frequently
			 * enough. In manual mode, we'll just tell it what it
			 * knows.
			 */
			else if (manual_mode) {
				charge_request(curr.chg.voltage,
					       curr.chg.current);
			} else {
				charge_request(curr.requested_voltage,
					       curr.requested_current);
			}
		} else {
			charge_request(
				charger_closest_voltage(
				  curr.batt.voltage + info->voltage_step), -1);
		}

		/* How long to sleep? */
		if (problems_exist)
			/* If there are errors, don't wait very long. */
			sleep_usec = CHARGE_POLL_PERIOD_SHORT;
		else if (sleep_usec <= 0) {
			/* default values depend on the state */
			if (curr.state == ST_IDLE ||
			    curr.state == ST_DISCHARGE) {
				/* If AP is off, we can sleep a long time */
				if (chipset_in_state(CHIPSET_STATE_ANY_OFF |
						     CHIPSET_STATE_SUSPEND))
					sleep_usec =
						CHARGE_POLL_PERIOD_VERY_LONG;
				else
					/* Discharging, not too urgent */
					sleep_usec = CHARGE_POLL_PERIOD_LONG;
			} else {
				/* Charging, so pay closer attention */
				sleep_usec = CHARGE_POLL_PERIOD_CHARGE;
			}
		}

		/* Adjust for time spent in this loop */
		sleep_usec -= (int)(get_time().val - curr.ts.val);
		if (sleep_usec < CHARGE_MIN_SLEEP_USEC)
			sleep_usec = CHARGE_MIN_SLEEP_USEC;
		else if (sleep_usec > CHARGE_MAX_SLEEP_USEC)
			sleep_usec = CHARGE_MAX_SLEEP_USEC;

		task_wait_event(sleep_usec);
	}
}
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;
}