enum battery_disconnect_state battery_get_disconnect_state(void)
{
uint8_t data[6];
int rv;
/*
* Take note if we find that the battery isn't in disconnect state,
* and always return NOT_DISCONNECTED without probing the battery.
* This assumes the battery will not go to disconnect state during
* runtime.
*/
static int not_disconnected;
if (not_disconnected)
return BATTERY_NOT_DISCONNECTED;
if (extpower_is_present()) {
/* Check if battery charging + discharging is disabled. */
rv = sb_write(SB_MANUFACTURER_ACCESS,
PARAM_OPERATION_STATUS);
if (rv)
return BATTERY_DISCONNECT_ERROR;
rv = sb_read_string(I2C_PORT_BATTERY, BATTERY_ADDR,
SB_ALT_MANUFACTURER_ACCESS, data, 6);
if (rv || (~data[3] & (BATTERY_DISCHARGING_DISABLED |
BATTERY_CHARGING_DISABLED))) {
not_disconnected = 1;
return BATTERY_NOT_DISCONNECTED;
}
/*
* Battery is neither charging nor discharging. Verify that
* we didn't enter this state due to a safety fault.
*/
rv = sb_write(SB_MANUFACTURER_ACCESS, PARAM_SAFETY_STATUS);
if (rv)
return BATTERY_DISCONNECT_ERROR;
rv = sb_read_string(I2C_PORT_BATTERY, BATTERY_ADDR,
SB_ALT_MANUFACTURER_ACCESS, data, 6);
if (rv || data[2] || data[3] || data[4] || data[5])
return BATTERY_DISCONNECT_ERROR;
/*
* Battery is present and also the status is initialized and
* no safety fault, battery is disconnected.
*/
if (battery_is_present() == BP_YES)
return BATTERY_DISCONNECTED;
}
not_disconnected = 1;
return BATTERY_NOT_DISCONNECTED;
}
//Get the specified battery's current charge in percent.
int get_battery_percentage(unsigned int battery_index) {
unsigned int percentage;
struct battery_status * status;
struct battery_info * info;
unsigned long capacity;
if (battery_index >= num_battery_structs_allocd)
return 0;
if (battery_is_present(battery_index) == NO)
return 0;
status = &last_status[battery_index];
info = &last_info[battery_index];
//If last_full_capacity isn't available, use design_capacity.
if (info->last_full_capacity != 0) {
capacity = info->last_full_capacity;
}
else {
capacity = info->design_capacity;
}
//Avoid dividing by zero
if (capacity == 0) {
percentage = 0;
}
else {
percentage = status->remaining_capacity * 100 / capacity;
}
//Don't report greater than 100% charge.
if (percentage > 100) {
percentage = 100;
}
return (int)percentage;
}
void battery_read_status(nyx_battery_status_t *state)
{
if (state) {
memset(state,0,sizeof(nyx_battery_status_t));
state->present = battery_is_present();
if (state->present) {
state->percentage = battery_percent();
state->temperature = battery_temperature();
state->current = battery_current();
state->voltage = battery_voltage();
state->avg_current = battery_current();
state->capacity = battery_coulomb();
state->capacity_raw = battery_rawcoulomb();
state->capacity_full40 = battery_full40();
state->age=battery_age();
if (state->avg_current > 0)
state->charging = true;
}
else
state->charging = false;
}
}
/**
* In certain cases we need to override the default behavior of not charging
* from non-dedicated chargers. If the system is in RO and locked, we have no
* way of determining the actual dualrole capability of the charger because
* PD communication is not allowed, so we must assume that it is dedicated.
* Also, if no battery is present, the charger may be our only source of power,
* so again we must assume that the charger is dedicated.
*/
static int charge_manager_spoof_dualrole_capability(void)
{
return (system_get_image_copy() == SYSTEM_IMAGE_RO &&
system_is_locked()) ||
(battery_is_present() != BP_YES);
}
/**
* 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;
}