static int command_power(int argc, char **argv)
{
int v;
if (argc < 2) {
enum power_state_t state;
state = PSTATE_UNKNOWN;
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
state = PSTATE_OFF;
if (chipset_in_state(CHIPSET_STATE_SUSPEND))
state = PSTATE_SUSPEND;
if (chipset_in_state(CHIPSET_STATE_ON))
state = PSTATE_ON;
ccprintf("%s\n", state_name[state]);
return EC_SUCCESS;
}
if (!parse_bool(argv[1], &v))
return EC_ERROR_PARAM1;
power_request = v ? POWER_REQ_ON : POWER_REQ_OFF;
ccprintf("Requesting power %s\n", power_req_name[power_request]);
task_wake(TASK_ID_CHIPSET);
return EC_SUCCESS;
}
static void oak_led_set_power(int board_version)
{
static int power_second;
power_second++;
switch(board_version) {
case OAK_REV3:
case OAK_REV4:
/*
* For Rev3 and Rev4 revision.
* PWR LED behavior:
* Power on: Green ON
* Suspend: Orange in breeze mode ( 1 sec on/ 3 sec off)
* Power off: OFF
*/
if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
bat_led_set(PWR_LED_GREEN, 0);
bat_led_set(PWR_LED_ORANGE, 0);
} else if (chipset_in_state(CHIPSET_STATE_ON)) {
bat_led_set(PWR_LED_GREEN, 1);
bat_led_set(PWR_LED_ORANGE, 0);
} else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) {
bat_led_set(PWR_LED_GREEN, 0);
bat_led_set(PWR_LED_ORANGE,
(power_second & 3) ? 0 : 1);
}
break;
default:
break;
}
}
/*
* In AP S0ix & S3 -> S0 transitions,
* the chipset_resume hook is called.
*
* During S0ix exit, the wake mask for lid open is disabled.
* All pending events are cleared
*
*/
void lpc_disable_wake_mask_for_lid_open(void)
{
if ((chipset_in_state(CHIPSET_STATE_STANDBY | CHIPSET_STATE_ON)) ||
chipset_in_state(CHIPSET_STATE_ON)) {
lpc_set_host_event_mask(LPC_HOST_EVENT_WAKE, 0);
lpc_clear_host_events();
}
}
/*
* In AP S0 -> S3 & S0ix transitions,
* the chipset_suspend is called.
*
* The chipset_in_state(CHIPSET_STATE_STANDBY | CHIPSET_STATE_ON)
* is used to detect the S0ix transiton.
*
* During S0ix entry, the wake mask for lid open is enabled.
*
*/
void lpc_enable_wake_mask_for_lid_open(void)
{
if ((chipset_in_state(CHIPSET_STATE_STANDBY | CHIPSET_STATE_ON)) ||
chipset_in_state(CHIPSET_STATE_STANDBY)) {
uint32_t mask = 0;
mask = ((lpc_get_host_event_mask(LPC_HOST_EVENT_WAKE)) |
EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN));
lpc_set_host_event_mask(LPC_HOST_EVENT_WAKE, mask);
} }
/*
* 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();
}
}
}
static void std_led_set_power(void)
{
static int power_second;
power_second++;
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
pwr_led_set_color(LED_OFF);
else if (chipset_in_state(CHIPSET_STATE_ON))
pwr_led_set_color(LED_WHITE);
else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
pwr_led_set_color((power_second & 3) ? LED_OFF : LED_WHITE);
}
static void spi_init(void)
{
stm32_spi_regs_t *spi = STM32_SPI1_REGS;
/* Reset the SPI Peripheral to clear any existing weird states. */
/* Fix for bug chrome-os-partner:31390 */
enabled = 0;
state = SPI_STATE_DISABLED;
STM32_RCC_APB2RSTR |= (1 << 12);
STM32_RCC_APB2RSTR &= ~(1 << 12);
/* 40 MHz pin speed */
STM32_GPIO_OSPEEDR(GPIO_A) |= 0xff00;
/* Enable clocks to SPI1 module */
STM32_RCC_APB2ENR |= STM32_RCC_PB2_SPI1;
/*
* Enable rx/tx DMA and get ready to receive our first transaction and
* "disable" FIFO by setting event to happen after only 1 byte
*/
spi->cr2 = STM32_SPI_CR2_RXDMAEN | STM32_SPI_CR2_TXDMAEN |
STM32_SPI_CR2_FRXTH;
/* Enable the SPI peripheral */
spi->cr1 |= STM32_SPI_CR1_SPE;
gpio_enable_interrupt(GPIO_SPI1_NSS);
/* If chipset is already on, prepare for transactions */
if (chipset_in_state(CHIPSET_STATE_ON))
spi_chipset_startup();
}
int peci_temp_sensor_get_val(int idx, int *temp_ptr)
{
int sum = 0;
int success_cnt = 0;
int i;
if (!chipset_in_state(CHIPSET_STATE_ON))
return EC_ERROR_NOT_POWERED;
for (i = 0; i < TEMP_AVG_LENGTH; ++i) {
if (temp_vals[i] >= 0) {
success_cnt++;
sum += temp_vals[i];
}
}
/*
* Require at least two valid samples. When the AP transitions into S0,
* it is possible, depending on the timing of the PECI sample, to read
* an invalid temperature. This is very rare, but when it does happen
* the temperature returned is CONFIG_PECI_TJMAX. Requiring two valid
* samples here assures us that one bad maximum temperature reading
* when entering S0 won't cause us to trigger an over temperature.
*/
if (success_cnt < 2)
return EC_ERROR_UNKNOWN;
*temp_ptr = sum / success_cnt;
return EC_SUCCESS;
}
static void kevin_led_set_power_battery(void)
{
static int power_ticks;
if (chipset_in_state(CHIPSET_STATE_ON)) {
set_color(LED_BLUE);
return;
}
/* CHIPSET_STATE_OFF */
switch (charge_get_state()) {
case PWR_STATE_DISCHARGE:
set_color(LED_OFF);
break;
case PWR_STATE_CHARGE:
set_color(LED_RED);
break;
case PWR_STATE_ERROR:
power_ticks++;
set_color(((power_ticks % LED_TOTAL_TICKS)
< LED_ON_TICKS) ? LED_RED : LED_GREEN);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
case PWR_STATE_IDLE: /* External power connected in IDLE. */
set_color(LED_GREEN);
break;
default:
set_color(LED_RED);
break;
}
if ((charge_get_state()) != PWR_STATE_ERROR)
power_ticks = 0;
}
static void big_led_set_power(void)
{
static int power_second;
power_second++;
/* PWR LED behavior:
* Power on: Blue
* Suspend: Orange in breeze mode ( 1 sec on/ 3 sec off)
* Power off: OFF
*/
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
pwr_led_set_color(LED_OFF);
else if (chipset_in_state(CHIPSET_STATE_ON))
pwr_led_set_color(LED_BLUE);
else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
pwr_led_set_color((power_second & 3) ? LED_OFF : LED_ORANGE);
}
static void jerry_led_set_power(void)
{
static int power_second;
power_second++;
/* PWR LED behavior:
* Power on: Green
* Suspend: Green in breeze mode ( 1 sec on/ 3 sec off)
* Power off: OFF
*/
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
pwr_led_set(0);
else if (chipset_in_state(CHIPSET_STATE_ON))
pwr_led_set(1);
else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
pwr_led_set((power_second & 3) ? 0 : 1);
}
/**
* Turn off the AP
*/
static int system_off(void)
{
if (chipset_in_state(CHIPSET_STATE_ON)) {
CPRINTS("pmu turning system off");
chipset_force_shutdown();
}
return ST_IDLE0;
}
static void motion_sense_startup(void)
{
int i;
struct motion_sensor_t *sensor;
sensor_active = SENSOR_ACTIVE_S5;
for (i = 0; i < motion_sensor_count; ++i) {
sensor = &motion_sensors[i];
sensor->state = SENSOR_NOT_INITIALIZED;
}
/* If the AP is already in S0, call the resume hook now.
* We may initialize the sensor 2 times (once in RO, anoter time in RW),
* but it may be necessary if the init sequence has changed.
*/
if (chipset_in_state(SENSOR_ACTIVE_S0_S3))
motion_sense_suspend();
if (chipset_in_state(SENSOR_ACTIVE_S0))
motion_sense_resume();
}
/*
* In AP S0ix & S3 -> S0 transitions,
* the chipset_resume hook is called.
*
* During S0ix exit, the wake mask for lid open is disabled.
* All pending events are cleared
*/
void lpc_disable_wake_mask_for_lid_open(void)
{
if (chipset_in_state(CHIPSET_STATE_STANDBY | CHIPSET_STATE_ON)) {
uint32_t mask;
mask = lpc_get_host_event_mask(LPC_HOST_EVENT_WAKE) &
~EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN);
lpc_set_host_event_mask(LPC_HOST_EVENT_WAKE, mask);
lpc_clear_host_events();
}
}
static void lpc_resume(void)
{
#ifdef CONFIG_POWER_S0IX
if (chipset_in_state(CHIPSET_STATE_SUSPEND | CHIPSET_STATE_ON))
#endif
{
/* Mask all host events until the host unmasks them itself. */
lpc_set_host_event_mask(LPC_HOST_EVENT_SMI, 0);
lpc_set_host_event_mask(LPC_HOST_EVENT_SCI, 0);
lpc_set_host_event_mask(LPC_HOST_EVENT_WAKE, 0);
}
/* Store port 80 event so we know where resume happened */
port_80_write(PORT_80_EVENT_RESUME);
}
/**
* Notify the host when battery remaining charge is lower than 10%
*/
static int notify_battery_low(void)
{
static timestamp_t last_notify_time;
timestamp_t now;
if (chipset_in_state(CHIPSET_STATE_ON)) {
now = get_time();
if (now.val - last_notify_time.val > MINUTE) {
CPRINTS("pmu notify battery low (< 4%)");
last_notify_time = now;
/* TODO(crosbug.com/p/23814): Actually notify AP */
}
}
return ST_DISCHARGING;
}
/* Enable or disable input devices, based upon chipset state and tablet mode */
static void enable_input_devices(void)
{
int kb_enable = 1;
int tp_enable = 1;
/* Disable KB & TP if chipset is off */
if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
kb_enable = 0;
tp_enable = 0;
}
keyboard_scan_enable(kb_enable, KB_SCAN_DISABLE_LID_ANGLE);
gpio_set_level(GPIO_EN_P3300_TRACKPAD_ODL, !tp_enable);
}
/* Enable or disable input devices, based upon chipset state and tablet mode */
static void enable_input_devices(void)
{
int kb_enable = 1;
int tp_enable = 1;
/* Disable both TP and KB in tablet mode */
if (!gpio_get_level(GPIO_TABLET_MODE_L))
kb_enable = tp_enable = 0;
/* Disable TP if chipset is off */
else if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
tp_enable = 0;
keyboard_scan_enable(kb_enable, KB_SCAN_DISABLE_LID_ANGLE);
gpio_set_level(GPIO_ENABLE_TOUCHPAD, tp_enable);
}
void chipset_force_shutdown(void)
{
CPRINTS("%s()", __func__);
/*
* Force off. Sending a reset command to the PMIC will power off
* the EC, so simulate a long power button press instead. This
* condition will reset once the state machine transitions to G3.
* Consider reducing the latency here by changing the power off
* hold time on the PMIC.
*/
if (!chipset_in_state(CHIPSET_STATE_HARD_OFF)) {
forcing_shutdown = 1;
power_button_pch_press();
}
}
int charger_profile_override(struct charge_state_data *curr)
{
if (override_voltage)
curr->requested_voltage = override_voltage;
if (override_current)
curr->requested_current = override_current;
if (override_usec)
return override_usec;
/* Don't let it sleep a whole minute when the AP is off */
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
return CHARGE_POLL_PERIOD_LONG;
return 0;
}
/**
* Setup backlight controller and turn it on.
*/
static void lp8555_enable_pwm_mode(void)
{
int reg;
int rv;
/*
* If not in S0, then PCH backlight enable will not be on, and if
* lid is closed EC backlight enable will not be on. Since these
* two signals are AND'ed together, no point in trying to talk to
* the lp8555 if either one of them is not true.
*/
if (!chipset_in_state(CHIPSET_STATE_ON) || !lid_is_open())
return;
/* Enable PWM mode. */
rv = lp8555_read_with_retry(LP8555_REG_CONFIG, ®);
if (rv != EC_SUCCESS)
return;
reg &= ~LP8555_REG_CONFIG_MODE_MASK;
reg |= LP8555_REG_CONFIG_MODE_PWM;
rv = lp8555_write_with_retry(LP8555_REG_CONFIG, reg);
if (rv != EC_SUCCESS)
return;
/* Set max LED current to 23mA. */
rv = lp8555_write_with_retry(LP8555_REG_CURRENT,
LP8555_REG_CURRENT_MAXCURR_23MA);
if (rv != EC_SUCCESS)
return;
/* Set the rate of brightness change. */
rv = lp8555_write_with_retry(LP8555_REG_STEP,
LP8555_REG_STEP_STEP_200MS |
LP8555_REG_STEP_PWM_IN_HYST_8LSB |
LP8555_REG_STEP_SMOOTH_HEAVY);
if (rv != EC_SUCCESS)
return;
/* Power on. */
rv = lp8555_read_with_retry(LP8555_REG_COMMAND, ®);
if (rv != EC_SUCCESS)
return;
reg |= LP8555_REG_COMMAND_ON;
rv = lp8555_write_with_retry(LP8555_REG_COMMAND, reg);
}
/**
* 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
}
}
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);
}
/**
* Prevent battery from going into deep discharge state
*/
static void low_battery_shutdown(struct charge_state_context *ctx)
{
if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
/* AP is off, so shut down the EC now */
CPRINTS("charge force EC hibernate due to low battery");
system_hibernate(0, 0);
} else if (!ctx->shutdown_warning_time.val) {
/* Warn AP battery level is so low we'll shut down */
CPRINTS("charge warn shutdown due to low battery");
ctx->shutdown_warning_time = get_time();
host_set_single_event(EC_HOST_EVENT_BATTERY_SHUTDOWN);
} else if (get_time().val > ctx->shutdown_warning_time.val +
LOW_BATTERY_SHUTDOWN_TIMEOUT_US) {
/* Timeout waiting for AP to shut down, so kill it */
CPRINTS("charge force shutdown due to low battery");
chipset_force_shutdown();
}
}
/**
* 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;
}
void mkbp_send_event(uint8_t event_type)
{
set_event(event_type);
#ifdef CONFIG_MKBP_WAKEUP_MASK
/* checking the event if AP suspended */
if (chipset_in_state(CHIPSET_STATE_SUSPEND)) {
uint32_t events;
events = *(uint32_t *)host_get_memmap(EC_MEMMAP_HOST_EVENTS);
/*
* interrupt the AP if it is a wakeup event
* which is defined in the white list.
*/
if ((events & CONFIG_MKBP_WAKEUP_MASK) ||
(event_type == EC_MKBP_EVENT_KEY_MATRIX))
set_host_interrupt(1);
return;
}
#endif
set_host_interrupt(1);
}
static void oak_led_set_battery(int board_version)
{
static int battery_second;
battery_second++;
switch(board_version) {
case OAK_REV3:
case OAK_REV4:
/*
* For Rev3 and Rev4 revision:
* BAT LED behavior:
* - Fully charged / idle: Green ON
* - Charging: Amber ON (BAT_LED_RED && BAT_LED_GREEN)
* - Battery discharging capacity<10%, red blink
* - Battery error: Red ON
*/
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
bat_led_set(BAT_LED_AMBER, 1);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
bat_led_set(BAT_LED_GREEN, 1);
bat_led_set(BAT_LED_RED, 0);
break;
case PWR_STATE_DISCHARGE:
bat_led_set(BAT_LED_GREEN, 0);
if (charge_get_percent() < 3)
bat_led_set(BAT_LED_RED,
(battery_second & 1) ? 0 : 1);
else if (charge_get_percent() < 10)
bat_led_set(BAT_LED_RED,
(battery_second & 3) ? 0 : 1);
else
bat_led_set(BAT_LED_RED, 0);
break;
case PWR_STATE_ERROR:
bat_led_set(BAT_LED_RED, 1);
break;
case PWR_STATE_IDLE: /* Ext. power connected in IDLE. */
bat_led_set(BAT_LED_GREEN, 1);
bat_led_set(BAT_LED_RED, 0);
break;
default:
/* Other states don't alter LED behavior */
break;
}
break; /* End of case OAK_REV3 & OAK_REV4 */
default:
/*
* Put power control here since we are using the "battery" LED.
* This allows LED autocontrol to be turned off by cmd during factory test.
*
* PWR LED behavior:
* Power on: Green
* Suspend: Green in breeze mode ( 1 sec on/ 3 sec off)
* Power off: OFF
*/
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
bat_led_set(BAT_LED_GREEN, 0);
else if (chipset_in_state(CHIPSET_STATE_ON))
bat_led_set(BAT_LED_GREEN, 1);
else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) {
int cycle_time = 4;
/* Oak rev5 with GlaDOS ID has a extremely power
* comsuming LED. Increase LED blink cycle time to reduce
* S3 power comsuption. */
if (board_version >= OAK_REV5)
cycle_time = 10;
bat_led_set(BAT_LED_GREEN,
(battery_second % cycle_time) ? 0 : 1);
}
/* BAT LED behavior:
* Fully charged / idle: Off
* Under charging: Orange
* Bat. low (10%): Orange in breeze mode (1s on, 3s off)
* Bat. critical low (less than 3%) or abnormal battery
* situation: Orange in blinking mode (1s on, 1s off)
* Using battery or not connected to AC power: OFF
*/
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
bat_led_set(BAT_LED_ORANGE, 1);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
bat_led_set(BAT_LED_ORANGE, 1);
break;
case PWR_STATE_DISCHARGE:
if (charge_get_percent() < 3)
bat_led_set(BAT_LED_ORANGE,
(battery_second & 1) ? 0 : 1);
else if (charge_get_percent() < 10)
bat_led_set(BAT_LED_ORANGE,
(battery_second & 3) ? 0 : 1);
else
bat_led_set(BAT_LED_ORANGE, 0);
break;
case PWR_STATE_ERROR:
bat_led_set(BAT_LED_ORANGE,
(battery_second & 1) ? 0 : 1);
break;
case PWR_STATE_IDLE: /* Ext. power connected in IDLE. */
bat_led_set(BAT_LED_ORANGE, 0);
break;
default:
/* Other states don't alter LED behavior */
break;
}
break; /* End of default */
}
}
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;
}
/* 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);
}
}
void charger_task(void)
{
int next_state;
int wait_time = T1_USEC;
timestamp_t pre_chg_start = get_time();
pmu_init();
/* Enable low current charging */
pmu_low_current_charging(1);
/* Enable charger interrupt */
gpio_enable_interrupt(GPIO_CHARGER_INT_L);
/*
* EC STOP mode support
* The charging loop can be stopped in idle state with AC unplugged.
* Charging loop will be resumed by TPSCHROME interrupt.
*/
enable_charging(0);
disable_sleep(SLEEP_MASK_CHARGING);
while (1) {
last_waken = get_time();
pmu_clear_irq();
#ifdef CONFIG_PMU_TPS65090_CHARGING_LED
update_battery_led();
#endif
/*
* When battery is extremely low, the internal voltage can not
* power on its gas guage IC. Charging loop will enable the
* charger and turn on trickle charging. For safty reason,
* charger should be disabled if the communication to battery
* failed.
*/
if (current_state == ST_PRE_CHARGING &&
get_time().val - pre_chg_start.val >= PRE_CHARGING_TIMEOUT)
next_state = ST_CHARGING_ERROR;
else
next_state = calc_next_state(current_state);
if (next_state != current_state) {
/* Reset state of charge moving average window */
rsoc_moving_average(-1);
CPRINTS("batt state %s -> %s",
state_list[current_state],
state_list[next_state]);
current_state = next_state;
switch (current_state) {
case ST_PRE_CHARGING:
pre_chg_start = get_time();
/* Fall through */
case ST_CHARGING:
if (pmu_blink_led(0))
next_state = ST_CHARGING_ERROR;
else
enable_charging(1);
break;
case ST_CHARGING_ERROR:
/*
* Enable hardware charging circuit after set
* PMU to hardware error state.
*/
if (pmu_blink_led(1))
enable_charging(0);
else
enable_charging(1);
break;
case ST_IDLE:
case ST_IDLE0:
case ST_BAD_COND:
case ST_DISCHARGING:
enable_charging(0);
/* Ignore charger error when discharging */
pmu_blink_led(0);
break;
}
}
switch (current_state) {
case ST_CHARGING:
case ST_CHARGING_ERROR:
wait_time = T2_USEC;
break;
case ST_DISCHARGING:
wait_time = T3_USEC;
break;
case ST_PRE_CHARGING:
wait_time = T1_USEC;
if (get_time().val - pre_chg_start.val >=
PRE_CHARGING_TIMEOUT)
enable_charging(0);
break;
default:
if (extpower_is_present()) {
wait_time = T1_USEC;
break;
} else if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
wait_time = T1_OFF_USEC;
enable_sleep(SLEEP_MASK_CHARGING);
} else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) {
wait_time = T1_SUSPEND_USEC;
} else {
wait_time = T1_USEC;
}
}
if (!has_pending_event) {
task_wait_event(wait_time);
disable_sleep(SLEEP_MASK_CHARGING);
} else {
has_pending_event = 0;
}
}
}
