static int charge_force_idle(int enable)
{
if (enable) {
/*
* Force-idle state is only meaningful if external power is
* present. If it's not present we can't charge anyway...
*/
if (!(charge_get_flags() & CHARGE_FLAG_EXTERNAL_POWER))
return EC_ERROR_UNKNOWN;
charger_post_init();
}
state_machine_force_idle = enable;
return EC_SUCCESS;
}
/* 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);
}
}
/**
* Common handler for charging states.
*
* This handler gets battery charging parameters, charger state, ac state, and
* timestamp. It also fills memory map and issues power events on state change.
*/
static int state_common(struct charge_state_context *ctx)
{
int rv, d;
struct charge_state_data *curr = &ctx->curr;
struct charge_state_data *prev = &ctx->prev;
struct batt_params *batt = &ctx->curr.batt;
uint8_t *batt_flags = ctx->memmap_batt_flags;
/* Copy previous state and init new state */
ctx->prev = ctx->curr;
curr->ts = get_time();
curr->error = 0;
/* Detect AC change */
curr->ac = charge_get_flags() & CHARGE_FLAG_EXTERNAL_POWER;
if (curr->ac != prev->ac) {
if (curr->ac) {
/* AC on
* Initialize charger to power on reset mode
*/
rv = charger_post_init();
if (rv)
curr->error |= F_CHARGER_INIT;
}
}
if (curr->ac) {
*batt_flags |= EC_BATT_FLAG_AC_PRESENT;
if (charger_get_voltage(&curr->charging_voltage)) {
charge_request(0, 0);
curr->error |= F_CHARGER_VOLTAGE;
}
if (charger_get_current(&curr->charging_current)) {
charge_request(0, 0);
curr->error |= F_CHARGER_CURRENT;
}
#ifdef CONFIG_CHARGER_EN_GPIO
if (!charge_get_charger_en_gpio()) {
curr->charging_voltage = 0;
curr->charging_current = 0;
}
#endif
} else {
*batt_flags &= ~EC_BATT_FLAG_AC_PRESENT;
/* AC disconnected should get us out of force idle mode. */
state_machine_force_idle = 0;
}
#if defined(CONFIG_BATTERY_PRESENT_CUSTOM) || \
defined(CONFIG_BATTERY_PRESENT_GPIO)
if (battery_is_present() == BP_NO) {
curr->error |= F_BATTERY_NOT_CONNECTED;
return curr->error;
}
#endif
/* Read params and see if battery is responsive */
battery_get_params(batt);
if (!(batt->flags & BATT_FLAG_RESPONSIVE)) {
/* Check low battery condition and retry */
if (curr->ac && ctx->battery_responsive &&
!(curr->error & F_CHARGER_MASK)) {
ctx->battery_responsive = 0;
/*
* Try to revive ultra low voltage pack. Charge
* battery pack with minimum current and maximum
* voltage for 30 seconds.
*/
charge_request(ctx->battery->voltage_max,
ctx->battery->precharge_current);
for (d = 0; d < PRECHARGE_TIMEOUT; d++) {
sleep(1);
battery_get_params(batt);
if (batt->flags & BATT_FLAG_RESPONSIVE) {
ctx->battery_responsive = 1;
break;
}
}
}
/* Set error if battery is still unresponsive */
if (!(batt->flags & BATT_FLAG_RESPONSIVE)) {
curr->error |= F_BATTERY_UNRESPONSIVE;
return curr->error;
}
} else {
ctx->battery_responsive = 1;
}
/* Translate flags */
if (batt->flags & BATT_FLAG_BAD_ANY)
curr->error |= F_BATTERY_GET_PARAMS;
if (batt->flags & BATT_FLAG_BAD_VOLTAGE)
curr->error |= F_BATTERY_VOLTAGE;
if (batt->flags & BATT_FLAG_BAD_STATE_OF_CHARGE)
curr->error |= F_BATTERY_STATE_OF_CHARGE;
*ctx->memmap_batt_volt = batt->voltage;
/* Memory mapped value: discharge rate */
*ctx->memmap_batt_rate = batt->current < 0 ?
-batt->current : batt->current;
/* Fake state of charge if necessary */
if (fake_state_of_charge >= 0) {
batt->state_of_charge = fake_state_of_charge;
curr->error &= ~F_BATTERY_STATE_OF_CHARGE;
}
if (batt->state_of_charge != prev->batt.state_of_charge) {
rv = battery_full_charge_capacity(&d);
if (!rv && d != *(int *)host_get_memmap(EC_MEMMAP_BATT_LFCC)) {
*(int *)host_get_memmap(EC_MEMMAP_BATT_LFCC) = d;
/* Notify host to re-read battery information */
host_set_single_event(EC_HOST_EVENT_BATTERY);
}
}
/* Prevent deep discharging */
if (!curr->ac) {
if ((batt->state_of_charge < BATTERY_LEVEL_SHUTDOWN &&
!(curr->error & F_BATTERY_STATE_OF_CHARGE)) ||
(batt->voltage <= ctx->battery->voltage_min &&
!(curr->error & F_BATTERY_VOLTAGE)))
low_battery_shutdown(ctx);
}
/* Check battery presence */
if (curr->error & F_BATTERY_MASK) {
*ctx->memmap_batt_flags &= ~EC_BATT_FLAG_BATT_PRESENT;
return curr->error;
}
*ctx->memmap_batt_flags |= EC_BATT_FLAG_BATT_PRESENT;
/* Battery charge level low */
if (batt->state_of_charge <= BATTERY_LEVEL_LOW &&
prev->batt.state_of_charge > BATTERY_LEVEL_LOW)
host_set_single_event(EC_HOST_EVENT_BATTERY_LOW);
/* Battery charge level critical */
if (batt->state_of_charge <= BATTERY_LEVEL_CRITICAL) {
*ctx->memmap_batt_flags |= EC_BATT_FLAG_LEVEL_CRITICAL;
/* Send battery critical host event */
if (prev->batt.state_of_charge > BATTERY_LEVEL_CRITICAL)
host_set_single_event(EC_HOST_EVENT_BATTERY_CRITICAL);
} else {
*ctx->memmap_batt_flags &= ~EC_BATT_FLAG_LEVEL_CRITICAL;
}
#ifdef CONFIG_BATTERY_OVERRIDE_PARAMS
/* Apply battery pack vendor charging method */
battery_override_params(batt);
#endif
#ifdef CONFIG_CHARGER_CURRENT_LIMIT
if (batt->desired_current > CONFIG_CHARGER_CURRENT_LIMIT)
batt->desired_current = CONFIG_CHARGER_CURRENT_LIMIT;
#endif
if (batt->desired_current > user_current_limit)
batt->desired_current = user_current_limit;
if (fake_state_of_charge >= 0)
*ctx->memmap_batt_cap =
fake_state_of_charge *
*(int *)host_get_memmap(EC_MEMMAP_BATT_LFCC) / 100;
else if (battery_remaining_capacity(&d))
ctx->curr.error |= F_BATTERY_CAPACITY;
else
*ctx->memmap_batt_cap = d;
return ctx->curr.error;
}
