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|
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Battery charging task and state machine.
*/
#include "battery.h"
#include "charge_state.h"
#include "charger.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "printf.h"
#include "system.h"
#include "task.h"
#include "timer.h"
#include "util.h"
/* Console output macros */
#define CPUTS(outstr) cputs(CC_CHARGER, outstr)
#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
/* Voltage debounce time */
#define DEBOUNCE_TIME (10 * SECOND)
#define LOW_BATTERY_SHUTDOWN_TIMEOUT_US (LOW_BATTERY_SHUTDOWN_TIMEOUT * SECOND)
#ifndef BATTERY_AP_OFF_LEVEL
#define BATTERY_AP_OFF_LEVEL 0
#endif
static const char * const state_name[] = CHARGE_STATE_NAME_TABLE;
static int state_machine_force_idle;
static unsigned user_current_limit = -1U;
static int fake_state_of_charge = -1;
/* Current power state context */
static struct charge_state_context task_ctx;
static inline int is_charger_expired(
struct charge_state_context *ctx, timestamp_t now)
{
return now.val - ctx->charger_update_time.val > CHARGER_UPDATE_PERIOD;
}
static inline void update_charger_time(
struct charge_state_context *ctx, timestamp_t now)
{
ctx->charger_update_time.val = now.val;
}
/**
* Update memory-mapped battery information, used by ACPI _BIF and/or _BIX.
*/
static void update_battery_info(void)
{
char *batt_str;
int batt_serial;
/* Design Capacity of Full */
battery_design_capacity((int *)host_get_memmap(EC_MEMMAP_BATT_DCAP));
/* Design Voltage */
battery_design_voltage((int *)host_get_memmap(EC_MEMMAP_BATT_DVLT));
/* Last Full Charge Capacity */
battery_full_charge_capacity(
(int *)host_get_memmap(EC_MEMMAP_BATT_LFCC));
/* Cycle Count */
battery_cycle_count((int *)host_get_memmap(EC_MEMMAP_BATT_CCNT));
/* Battery Manufacturer string */
batt_str = (char *)host_get_memmap(EC_MEMMAP_BATT_MFGR);
memset(batt_str, 0, EC_MEMMAP_TEXT_MAX);
battery_manufacturer_name(batt_str, EC_MEMMAP_TEXT_MAX);
/* Battery Model string */
batt_str = (char *)host_get_memmap(EC_MEMMAP_BATT_MODEL);
memset(batt_str, 0, EC_MEMMAP_TEXT_MAX);
battery_device_name(batt_str, EC_MEMMAP_TEXT_MAX);
/* Battery Type string */
batt_str = (char *)host_get_memmap(EC_MEMMAP_BATT_TYPE);
battery_device_chemistry(batt_str, EC_MEMMAP_TEXT_MAX);
/* Smart battery serial number is 16 bits */
batt_str = (char *)host_get_memmap(EC_MEMMAP_BATT_SERIAL);
memset(batt_str, 0, EC_MEMMAP_TEXT_MAX);
if (battery_serial_number(&batt_serial) == 0)
snprintf(batt_str, EC_MEMMAP_TEXT_MAX, "%04X", batt_serial);
/* Battery data is now present */
*host_get_memmap(EC_MEMMAP_BATTERY_VERSION) = 1;
}
/**
* 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();
}
}
int charge_keep_power_off(void)
{
int charge;
if (BATTERY_AP_OFF_LEVEL == 0)
return 0;
if (battery_remaining_capacity(&charge))
return charge_get_state() != PWR_STATE_ERROR;
return charge <= BATTERY_AP_OFF_LEVEL;
}
#ifdef CONFIG_CHARGER_EN_GPIO
#ifdef CONFIG_CHARGER_EN_ACTIVE_LOW
static void charge_set_charger_en_gpio(int level)
{
gpio_set_level(GPIO_CHARGER_EN_L, !level);
}
static int charge_get_charger_en_gpio(void)
{
return !gpio_get_level(GPIO_CHARGER_EN_L);
}
#else
static void charge_set_charger_en_gpio(int level)
{
gpio_set_level(GPIO_CHARGER_EN, level);
}
static int charge_get_charger_en_gpio(void)
{
return gpio_get_level(GPIO_CHARGER_EN);
}
#endif
#endif
/**
* Enable or disable charging, and set requested voltage and current. If either
* of voltage and current is set to 0, charging is disable.
*
* @param voltage Requested voltage in mV. Set -1 to preserve current value.
* @param current Requested current in mA. Set -1 to preserve current value.
*/
static int charge_request(int voltage, int current)
{
int rv = EC_SUCCESS;
if (voltage == -1 && current == -1)
return EC_SUCCESS;
#ifdef CONFIG_CHARGER_EN_GPIO
if (voltage == 0 || current == 0) {
charge_set_charger_en_gpio(0);
return EC_SUCCESS;
} else {
charge_set_charger_en_gpio(1);
}
#endif
if (voltage != -1)
rv |= charger_set_voltage(voltage);
if (current != -1)
rv |= charger_set_current(current);
return rv;
}
/**
* 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;
}
/**
* Init state handler
*
* - check ac, charger, battery and temperature
* - initialize charger
* - new states: DISCHARGE, IDLE
*/
static enum charge_state state_init(struct charge_state_context *ctx)
{
/* Stop charger, unconditionally */
charge_request(0, 0);
/* if battery was not detected initially, get battery info again */
if (ctx->battery == NULL)
ctx->battery = battery_get_info();
/* Update static battery info */
update_battery_info();
/* Clear shutdown timer */
ctx->shutdown_warning_time.val = 0;
/* If AC is not present, switch to discharging state */
if (!ctx->curr.ac)
return PWR_STATE_DISCHARGE;
/* Check general error conditions */
if (ctx->curr.error)
return PWR_STATE_ERROR;
/* Send battery event to host */
host_set_single_event(EC_HOST_EVENT_BATTERY);
return PWR_STATE_IDLE0;
}
/**
* Idle state handler
*
* - both charger and battery are online
* - detect charger and battery status change
* - new states: CHARGE, INIT
*/
static enum charge_state state_idle(struct charge_state_context *ctx)
{
struct batt_params *batt = &ctx->curr.batt;
/* If we are forcing idle mode, then just stay in IDLE. */
if (state_machine_force_idle)
return PWR_STATE_UNCHANGE;
if (!ctx->curr.ac)
return PWR_STATE_REINIT;
if (ctx->curr.error)
return PWR_STATE_ERROR;
/* Prevent charging in idle mode */
if (ctx->curr.charging_voltage ||
ctx->curr.charging_current)
return PWR_STATE_REINIT;
if (batt->state_of_charge >= BATTERY_LEVEL_FULL)
return PWR_STATE_UNCHANGE;
/* Configure init charger state and switch to charge state */
if (batt->flags & BATT_FLAG_WANT_CHARGE) {
int want_current =
charger_closest_current(batt->desired_current);
CPRINTS("Charge start %dmV %dmA",
batt->desired_voltage, want_current);
if (charge_request(batt->desired_voltage, want_current))
return PWR_STATE_ERROR;
update_charger_time(ctx, get_time());
if (ctx->curr.batt.state_of_charge < BATTERY_LEVEL_NEAR_FULL)
return PWR_STATE_CHARGE;
else
return PWR_STATE_CHARGE_NEAR_FULL;
}
return PWR_STATE_UNCHANGE;
}
/**
* Charge state handler
*
* - detect battery status change
* - new state: INIT
*/
static enum charge_state state_charge(struct charge_state_context *ctx)
{
struct charge_state_data *curr = &ctx->curr;
struct batt_params *batt = &ctx->curr.batt;
int debounce = 0;
int want_current;
int want_voltage;
timestamp_t now;
if (curr->error)
return PWR_STATE_ERROR;
/*
* Some chargers will reset out from underneath us. If this happens,
* reinitialize charging.
*/
if (curr->charging_voltage == 0 ||
curr->charging_current == 0)
return PWR_STATE_REINIT;
if (!curr->ac)
return PWR_STATE_REINIT;
/* Stop charging if charging is no longer allowed */
if (!(batt->flags & BATT_FLAG_WANT_CHARGE)) {
if (charge_request(0, 0))
return PWR_STATE_ERROR;
return PWR_STATE_IDLE;
}
now = get_time();
/*
* Adjust desired voltage to one the charger can actually supply
* or else we'll keep asking for a voltage the charger can't actually
* supply.
*/
want_voltage = charger_closest_voltage(batt->desired_voltage);
if (want_voltage != curr->charging_voltage) {
CPRINTS("Charge voltage %dmV", want_voltage);
if (charge_request(want_voltage, -1))
return PWR_STATE_ERROR;
update_charger_time(ctx, now);
}
/*
* Adjust desired current to one the charger can actually supply before
* we do debouncing, or else we'll keep asking for a current the
* charger can't actually supply.
*/
want_current = charger_closest_current(batt->desired_current);
if (want_current == curr->charging_current) {
/* Tick charger watchdog */
if (!is_charger_expired(ctx, now))
return PWR_STATE_UNCHANGE;
} else if (want_current > curr->charging_current) {
if (!timestamp_expired(ctx->voltage_debounce_time, &now))
return PWR_STATE_UNCHANGE;
} else {
debounce = 1;
}
if (want_current != curr->charging_current) {
CPRINTS("Charge current %dmA @ %dmV",
want_current, batt->desired_voltage);
}
if (charge_request(-1, want_current))
return PWR_STATE_ERROR;
/* Update charger watchdog timer and debounce timer */
update_charger_time(ctx, now);
if (debounce)
ctx->voltage_debounce_time.val = now.val + DEBOUNCE_TIME;
return PWR_STATE_UNCHANGE;
}
/**
* 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;
}
/**
* Error state handler
*
* - check charger and battery communication
* - log error
* - new state: INIT
*/
static enum charge_state state_error(struct charge_state_context *ctx)
{
static int logged_error;
if (!ctx->curr.error) {
logged_error = 0;
return PWR_STATE_REINIT;
}
charge_request(0, 0);
/* Debug output */
if (ctx->curr.error != logged_error) {
CPRINTS("Charge error: flag[%08b -> %08b], ac %d, "
" charger %s, battery %s",
logged_error, ctx->curr.error, ctx->curr.ac,
(ctx->curr.error & F_CHARGER_MASK) ? "(err)" : "ok",
(ctx->curr.error & F_BATTERY_MASK) ? "(err)" : "ok");
logged_error = ctx->curr.error;
}
return PWR_STATE_UNCHANGE;
}
/**
* Print charging progress
*/
static void charging_progress(struct charge_state_context *ctx)
{
int seconds, minutes;
if (ctx->curr.batt.state_of_charge != ctx->prev.batt.state_of_charge) {
if (ctx->curr.ac)
battery_time_to_full(&minutes);
else
battery_time_to_empty(&minutes);
CPRINTS("Battery %3d%% / %dh:%d",
ctx->curr.batt.state_of_charge,
minutes / 60, minutes % 60);
return;
}
if (ctx->curr.charging_voltage != ctx->prev.charging_voltage &&
ctx->trickle_charging_time.val) {
/* Calculate minutes by dividing usec by 60 million. GNU
* toolchain generates architecture dependent calls instead of
* machine code when the divisor is large, so break the
* calculation into 2 lines.
*/
seconds = (int)(get_time().val -
ctx->trickle_charging_time.val) / (int)SECOND;
minutes = seconds / 60;
CPRINTS("Precharge CHG(%dmV) BATT(%dmV %dmA) "
"%dh:%d", ctx->curr.charging_voltage,
ctx->curr.batt.voltage, ctx->curr.batt.current,
minutes / 60, minutes % 60);
}
}
enum charge_state charge_get_state(void)
{
return task_ctx.curr.state;
}
uint32_t charge_get_flags(void)
{
uint32_t flags = 0;
if (state_machine_force_idle)
flags |= CHARGE_FLAG_FORCE_IDLE;
if (extpower_is_present())
flags |= CHARGE_FLAG_EXTERNAL_POWER;
return flags;
}
int charge_get_percent(void)
{
return task_ctx.curr.batt.state_of_charge;
}
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;
}
int charge_want_shutdown(void)
{
return (charge_get_state() == PWR_STATE_DISCHARGE) &&
charge_get_percent() < BATTERY_LEVEL_SHUTDOWN;
}
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;
}
const struct batt_params *charger_current_battery_params(void)
{
return &task_ctx.curr.batt;
}
/**
* Battery charging task
*/
void charger_task(void)
{
struct charge_state_context *ctx = &task_ctx;
timestamp_t ts;
int sleep_usec = CHARGE_POLL_PERIOD_SHORT, diff_usec, sleep_next;
enum charge_state new_state;
uint8_t batt_flags;
while (1) {
state_common(ctx);
#ifdef CONFIG_CHARGER_TIMEOUT_HOURS
if (ctx->curr.state == PWR_STATE_CHARGE &&
ctx->charge_state_updated_time.val +
CONFIG_CHARGER_TIMEOUT_HOURS * HOUR < ctx->curr.ts.val) {
CPRINTS("Charge timed out after %d hours",
CONFIG_CHARGER_TIMEOUT_HOURS);
charge_force_idle(1);
}
#endif /* CONFIG_CHARGER_TIMEOUT_HOURS */
switch (ctx->prev.state) {
case PWR_STATE_INIT:
case PWR_STATE_REINIT:
new_state = state_init(ctx);
break;
case PWR_STATE_IDLE0:
new_state = state_idle(ctx);
/* If still idling, move from IDLE0 to IDLE */
if (new_state == PWR_STATE_UNCHANGE)
new_state = PWR_STATE_IDLE;
break;
case PWR_STATE_IDLE:
new_state = state_idle(ctx);
break;
case PWR_STATE_DISCHARGE:
new_state = state_discharge(ctx);
break;
case PWR_STATE_CHARGE:
new_state = state_charge(ctx);
if (new_state == PWR_STATE_UNCHANGE &&
(ctx->curr.batt.state_of_charge >=
BATTERY_LEVEL_NEAR_FULL)) {
/* Almost done charging */
new_state = PWR_STATE_CHARGE_NEAR_FULL;
}
break;
case PWR_STATE_CHARGE_NEAR_FULL:
new_state = state_charge(ctx);
if (new_state == PWR_STATE_UNCHANGE &&
(ctx->curr.batt.state_of_charge <
BATTERY_LEVEL_NEAR_FULL)) {
/* Battery below almost-full threshold. */
new_state = PWR_STATE_CHARGE;
}
break;
case PWR_STATE_ERROR:
new_state = state_error(ctx);
break;
default:
CPRINTS("Charge state %d undefined",
ctx->curr.state);
ctx->curr.state = PWR_STATE_ERROR;
new_state = PWR_STATE_ERROR;
}
if (state_machine_force_idle &&
ctx->prev.state != PWR_STATE_IDLE0 &&
ctx->prev.state != PWR_STATE_IDLE &&
ctx->prev.state != PWR_STATE_INIT &&
ctx->prev.state != PWR_STATE_REINIT)
new_state = PWR_STATE_REINIT;
if (new_state) {
ctx->curr.state = new_state;
CPRINTS("Charge state %s -> %s after %.6ld sec",
state_name[ctx->prev.state],
state_name[new_state],
ctx->curr.ts.val -
ctx->charge_state_updated_time.val);
ctx->charge_state_updated_time = ctx->curr.ts;
hook_notify(HOOK_CHARGE_STATE_CHANGE);
}
switch (new_state) {
case PWR_STATE_IDLE0:
/*
* First time transitioning from init -> idle. Don't
* set the flags or LED yet because we may transition
* to charging on the next call and we don't want to
* blink the LED green.
*/
sleep_usec = CHARGE_POLL_PERIOD_SHORT;
break;
case PWR_STATE_CHARGE_NEAR_FULL:
/*
* Battery is almost charged. The last few percent
* take a loooong time, so fall through and look like
* we're charged. This mirrors similar hacks at the
* ACPI/kernel/UI level.
*/
case PWR_STATE_IDLE:
batt_flags = *ctx->memmap_batt_flags;
batt_flags &= ~EC_BATT_FLAG_CHARGING;
batt_flags &= ~EC_BATT_FLAG_DISCHARGING;
*ctx->memmap_batt_flags = batt_flags;
/* Charge done */
sleep_usec = (new_state == PWR_STATE_IDLE
? CHARGE_POLL_PERIOD_LONG
: CHARGE_POLL_PERIOD_CHARGE);
break;
case PWR_STATE_DISCHARGE:
batt_flags = *ctx->memmap_batt_flags;
batt_flags &= ~EC_BATT_FLAG_CHARGING;
batt_flags |= EC_BATT_FLAG_DISCHARGING;
*ctx->memmap_batt_flags = batt_flags;
sleep_usec = CHARGE_POLL_PERIOD_LONG;
break;
case PWR_STATE_CHARGE:
batt_flags = *ctx->memmap_batt_flags;
batt_flags |= EC_BATT_FLAG_CHARGING;
batt_flags &= ~EC_BATT_FLAG_DISCHARGING;
*ctx->memmap_batt_flags = batt_flags;
/* Charging */
sleep_usec = CHARGE_POLL_PERIOD_CHARGE;
break;
case PWR_STATE_ERROR:
/* Error */
sleep_usec = CHARGE_POLL_PERIOD_CHARGE;
break;
case PWR_STATE_UNCHANGE:
/* Don't change sleep duration */
break;
default:
/* Other state; poll quickly and hope it goes away */
sleep_usec = CHARGE_POLL_PERIOD_SHORT;
}
#ifdef CONFIG_EXTPOWER_FALCO
watch_adapter_closely(ctx);
sleep_usec = EXTPOWER_FALCO_POLL_PERIOD;
#endif
/* Show charging progress in console */
charging_progress(ctx);
ts = get_time();
diff_usec = (int)(ts.val - ctx->curr.ts.val);
sleep_next = sleep_usec - diff_usec;
if (ctx->curr.state == PWR_STATE_DISCHARGE &&
chipset_in_state(CHIPSET_STATE_ANY_OFF |
CHIPSET_STATE_SUSPEND)) {
/*
* Discharging and system is off or suspended, so no
* need to poll frequently. charge_hook() will wake us
* up if anything important changes.
*/
sleep_next = CHARGE_POLL_PERIOD_VERY_LONG - diff_usec;
} else if (sleep_next < CHARGE_MIN_SLEEP_USEC) {
sleep_next = CHARGE_MIN_SLEEP_USEC;
} else if (sleep_next > CHARGE_MAX_SLEEP_USEC) {
sleep_next = CHARGE_MAX_SLEEP_USEC;
}
task_wait_event(sleep_next);
}
}
/*****************************************************************************/
/* Hooks */
/**
* Chipset notification hook.
*
* This is triggered when the system boots or resumes, so that we can update
* our charging state.
*/
static void chipset_hook(void)
{
/* Wake up the task now */
task_wake(TASK_ID_CHARGER);
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, chipset_hook, HOOK_PRIO_DEFAULT);
/**
* AC change notification hook.
*
* This is triggered when the AC state changes, so that we can update the
* memory-mapped AC status and our charging state.
*/
static void ac_change_hook(void)
{
/**
* Update the memory-mapped AC_PRESENT flag immediately so the
* state is correct prior to the host being notified of the AC
* change event.
*/
if (extpower_is_present())
*task_ctx.memmap_batt_flags |= EC_BATT_FLAG_AC_PRESENT;
else
*task_ctx.memmap_batt_flags &= ~EC_BATT_FLAG_AC_PRESENT;
/* Wake up the task now */
task_wake(TASK_ID_CHARGER);
}
DECLARE_HOOK(HOOK_AC_CHANGE, ac_change_hook, HOOK_PRIO_DEFAULT);
static void charge_init(void)
{
struct charge_state_context *ctx = &task_ctx;
ctx->prev.state = PWR_STATE_INIT;
ctx->curr.state = PWR_STATE_INIT;
ctx->trickle_charging_time.val = 0;
ctx->battery = battery_get_info();
ctx->charger = charger_get_info();
/* Assume the battery is responsive until proven otherwise */
ctx->battery_responsive = 1;
/* Set up LPC direct memmap */
ctx->memmap_batt_volt =
(uint32_t *)host_get_memmap(EC_MEMMAP_BATT_VOLT);
ctx->memmap_batt_rate =
(uint32_t *)host_get_memmap(EC_MEMMAP_BATT_RATE);
ctx->memmap_batt_cap =
(uint32_t *)host_get_memmap(EC_MEMMAP_BATT_CAP);
ctx->memmap_batt_flags = host_get_memmap(EC_MEMMAP_BATT_FLAG);
}
DECLARE_HOOK(HOOK_INIT, charge_init, HOOK_PRIO_DEFAULT);
static void charge_shutdown(void)
{
/* Hibernate immediately if battery level is too low */
if (charge_want_shutdown()) {
CPRINTS("charge force EC hibernate after "
"shutdown due to low battery");
system_hibernate(0, 0);
}
}
/*
* Run the charge shutdown hook last, since when it hibernates no subsequent
* hooks would be run.
*/
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, charge_shutdown, HOOK_PRIO_LAST);
/*****************************************************************************/
/* Host commands */
static int charge_command_charge_control(struct host_cmd_handler_args *args)
{
const struct ec_params_charge_control *p = args->params;
int rv;
if (system_is_locked())
return EC_RES_ACCESS_DENIED;
rv = charge_force_idle(p->mode != CHARGE_CONTROL_NORMAL);
if (rv != EC_SUCCESS)
return rv;
#ifdef CONFIG_CHARGER_DISCHARGE_ON_AC
rv = board_discharge_on_ac(p->mode == CHARGE_CONTROL_DISCHARGE);
if (rv != EC_SUCCESS)
return rv;
#endif
return EC_RES_SUCCESS;
}
/*
* TODO(crbug.com/239197) : Adding both versions to the version mask is a
* temporary workaround for a problem in the cros_ec driver. Drop
* EC_VER_MASK(0) once cros_ec driver can send the correct version.
*/
DECLARE_HOST_COMMAND(EC_CMD_CHARGE_CONTROL, charge_command_charge_control,
EC_VER_MASK(0) | EC_VER_MASK(1));
static void reset_current_limit(void)
{
user_current_limit = -1;
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, reset_current_limit, HOOK_PRIO_DEFAULT);
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, reset_current_limit, HOOK_PRIO_DEFAULT);
static int charge_command_current_limit(struct host_cmd_handler_args *args)
{
const struct ec_params_current_limit *p = args->params;
user_current_limit = p->limit;
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_CHARGE_CURRENT_LIMIT, charge_command_current_limit,
EC_VER_MASK(0));
/*****************************************************************************/
/* Console commands */
static int command_battfake(int argc, char **argv)
{
char *e;
int v;
if (argc == 2) {
v = strtoi(argv[1], &e, 0);
if (*e || v < -1 || v > 100)
return EC_ERROR_PARAM1;
fake_state_of_charge = v;
}
if (fake_state_of_charge < 0)
ccprintf("Reporting real battery level\n");
else
ccprintf("Reporting fake battery level %d%%\n",
fake_state_of_charge);
/* Wake charger task immediately to see new level */
task_wake(TASK_ID_CHARGER);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(battfake, command_battfake,
"percent (-1 = use real level)",
"Set fake battery level",
NULL);
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