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chromium / chromiumos / platform / ec / 333f7d439d191281e17d5f1138723accc5e6831b / . / common / charge_state_v2.c
blob: 6f72d4e82bd1d854e9f42e94686256cb22a8a8f3 [file] [log] [blame]
/* Copyright (c) 2014 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 "battery_smart.h"
#include "charge_manager.h"
#include "charger_profile_override.h"
#include "charge_state.h"
#include "charger.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "ec_ec_comm_master.h"
#include "ec_ec_comm_slave.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "i2c.h"
#include "math_util.h"
#include "printf.h"
#include "system.h"
#include "task.h"
#include "throttle_ap.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)
#define CPRINTF(format, args...) cprintf(CC_CHARGER, format, ## args)
/* Extra debugging prints when allocating power between lid and base. */
#undef CHARGE_ALLOCATE_EXTRA_DEBUG
#define CRITICAL_BATTERY_SHUTDOWN_TIMEOUT_US \
(CONFIG_BATTERY_CRITICAL_SHUTDOWN_TIMEOUT * SECOND)
#define PRECHARGE_TIMEOUT_US (PRECHARGE_TIMEOUT * SECOND)
#define LFCC_EVENT_THRESH 5 /* Full-capacity change reqd for host event */
#ifdef CONFIG_THROTTLE_AP_ON_BAT_DISCHG_CURRENT
#ifndef CONFIG_HOSTCMD_EVENTS
#error "CONFIG_THROTTLE_AP_ON_BAT_DISCHG_CURRENT needs CONFIG_HOSTCMD_EVENTS"
#endif /* CONFIG_HOSTCMD_EVENTS */
#define BAT_OCP_TIMEOUT_US (60 * SECOND)
/* BAT_OCP_HYSTERESIS_PCT can be optionally overridden in board.h. */
#ifndef BAT_OCP_HYSTERESIS_PCT
#define BAT_OCP_HYSTERESIS_PCT 10
#endif /* BAT_OCP_HYSTERESIS_PCT */
#define BAT_OCP_HYSTERESIS \
(BAT_MAX_DISCHG_CURRENT * BAT_OCP_HYSTERESIS_PCT / 100) /* mA */
#endif /* CONFIG_THROTTLE_AP_ON_BAT_DISCHG_CURRENT */
#ifdef CONFIG_THROTTLE_AP_ON_BAT_VOLTAGE
#ifndef CONFIG_HOSTCMD_EVENTS
#error "CONFIG_THROTTLE_AP_ON_BAT_VOLTAGE needs CONFIG_HOSTCMD_EVENTS"
#endif /* CONFIG_HOSTCMD_EVENTS */
#define BAT_UVP_TIMEOUT_US (60 * SECOND)
/* BAT_UVP_HYSTERESIS_PCT can be optionally overridden in board.h. */
#ifndef BAT_UVP_HYSTERESIS_PCT
#define BAT_UVP_HYSTERESIS_PCT 3
#endif /* BAT_UVP_HYSTERESIS_PCT */
#define BAT_UVP_HYSTERESIS \
(BAT_LOW_VOLTAGE_THRESH * BAT_UVP_HYSTERESIS_PCT / 100) /* mV */
static timestamp_t uvp_throttle_start_time;
#endif /* CONFIG_THROTTLE_AP_ON_BAT_OLTAGE */
static int charge_request(int voltage, int current);
/*
* State for charger_task(). Here so we can reset it on a HOOK_INIT, and
* because stack space is more limited than .bss
*/
static const struct battery_info *batt_info;
static struct charge_state_data curr;
static enum charge_state_v2 prev_state;
static int prev_ac, prev_charge, prev_full;
static enum battery_present prev_bp;
static int is_full; /* battery not accepting current */
static enum ec_charge_control_mode chg_ctl_mode;
static int manual_voltage; /* Manual voltage override (-1 = no override) */
static int manual_current; /* Manual current override (-1 = no override) */
static unsigned int user_current_limit = -1U;
test_export_static timestamp_t shutdown_warning_time;
static timestamp_t precharge_start_time;
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
static int base_connected;
/* Base has responded to one of our commands already. */
static int base_responsive;
static int charge_base;
static int prev_charge_base;
static int prev_current_base;
static int prev_allow_charge_base;
static int prev_current_lid;
/*
* In debugging mode, with AC, input current to allocate to base. Negative
* value disables manual mode.
*/
static int manual_ac_current_base = -1;
/*
* In debugging mode, when discharging, current to transfer from lid to base
* (negative to transfer from base to lid). Only valid when enabled is true.
*/
static int manual_noac_enabled;
static int manual_noac_current_base;
#else
static const int base_connected;
#endif
/* Is battery connected but unresponsive after precharge? */
static int battery_seems_to_be_dead;
static int battery_seems_to_be_disconnected;
/*
* Was battery removed? Set when we see BP_NO, cleared after the battery is
* reattached and becomes responsive. Used to indicate an error state after
* removal and trigger re-reading the battery static info when battery is
* reattached and responsive.
*/
static int battery_was_removed;
static int problems_exist;
static int debugging;
/* Track problems in communicating with the battery or charger */
enum problem_type {
PR_STATIC_UPDATE,
PR_SET_VOLTAGE,
PR_SET_CURRENT,
PR_SET_MODE,
PR_SET_INPUT_CURR,
PR_POST_INIT,
PR_CHG_FLAGS,
PR_BATT_FLAGS,
PR_CUSTOM,
NUM_PROBLEM_TYPES
};
static const char * const prob_text[] = {
"static update",
"set voltage",
"set current",
"set mode",
"set input current",
"post init",
"chg params",
"batt params",
"custom profile",
};
BUILD_ASSERT(ARRAY_SIZE(prob_text) == NUM_PROBLEM_TYPES);
/*
* TODO(crosbug.com/p/27639): When do we decide a problem is real and not
* just intermittent? And what do we do about it?
*/
static void problem(enum problem_type p, int v)
{
static int __bss_slow last_prob_val[NUM_PROBLEM_TYPES];
static timestamp_t __bss_slow last_prob_time[NUM_PROBLEM_TYPES];
timestamp_t t_now, t_diff;
if (last_prob_val[p] != v) {
t_now = get_time();
t_diff.val = t_now.val - last_prob_time[p].val;
CPRINTS("charge problem: %s, 0x%x -> 0x%x after %.6lds",
prob_text[p], last_prob_val[p], v, t_diff.val);
last_prob_val[p] = v;
last_prob_time[p] = t_now;
}
problems_exist = 1;
}
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
/*
* Parameters for dual-battery policy.
* TODO(b:71881017): This should be made configurable by AP in the future.
*/
struct dual_battery_policy {
/*** Policies when AC is not connected. ***/
/* Voltage to use when using OTG mode between lid and base (mV) */
uint16_t otg_voltage;
/* Maximum current to apply from base to lid (mA) */
uint16_t max_base_to_lid_current;
/*
* Margin to apply between provided OTG output current and input current
* limit, to make sure that input charger does not overcurrent output
* charger. input_current = (1-margin) * output_current. (/128)
*/
uint8_t margin_otg_current;
/* Only do base to lid OTG when base battery above this value (%) */
uint8_t min_charge_base_otg;
/*
* When base/lid battery percentage is below this value, do
* battery-to-battery charging. (%)
*/
uint8_t max_charge_base_batt_to_batt;
uint8_t max_charge_lid_batt_to_batt;
/*** Policies when AC is connected. ***/
/* Minimum power to allocate to base (mW), includes some margin to allow
* base to charge when critically low.
*/
uint16_t min_base_system_power;
/* Smoothing factor for lid power (/128) */
uint8_t lid_system_power_smooth;
/*
* Smoothing factor for base/lid battery power, when the battery power
* is decreasing only: we try to estimate the maximum power that the
* battery is willing to take and always reset it when it draws more
* than the estimate. (/128)
*/
uint8_t battery_power_smooth;
/*
* Margin to add to requested base/lid battery power, to figure out how
* much current to allocate. allocation = (1+margin) * request. (/128)
*/
uint8_t margin_base_battery_power;
uint8_t margin_lid_battery_power;
/* Maximum current to apply from lid to base (mA) */
uint16_t max_lid_to_base_current;
};
static const struct dual_battery_policy db_policy = {
.otg_voltage = 12000, /* mV */
.max_base_to_lid_current = 1800, /* mA, about 2000mA with margin. */
.margin_otg_current = 13, /* /128 = 10.1% */
.min_charge_base_otg = 5, /* % */
.max_charge_base_batt_to_batt = 4, /* % */
.max_charge_lid_batt_to_batt = 10, /* % */
.min_base_system_power = 1300, /* mW */
.lid_system_power_smooth = 32, /* 32/128 = 0.25 */
.battery_power_smooth = 1, /* 1/128 = 0.008 */
.margin_base_battery_power = 32, /* 32/128 = 0.25 */
.margin_lid_battery_power = 32, /* 32/128 = 0.25 */
.max_lid_to_base_current = 2000, /* mA */
};
/* Add at most "value" to power_var, subtracting from total_power budget. */
#define CHG_ALLOCATE(power_var, total_power, value) do { \
int val_capped = MIN(value, total_power); \
(power_var) += val_capped; \
(total_power) -= val_capped; \
} while (0)
/* Update base battery information */
static void update_base_battery_info(void)
{
struct ec_response_battery_dynamic_info *const bd =
&battery_dynamic[BATT_IDX_BASE];
base_connected = board_is_base_connected();
if (!base_connected) {
const int invalid_flags = EC_BATT_FLAG_INVALID_DATA;
/* Invalidate static/dynamic information */
if (bd->flags != invalid_flags) {
bd->flags = invalid_flags;
host_set_single_event(EC_HOST_EVENT_BATTERY);
host_set_single_event(EC_HOST_EVENT_BATTERY_STATUS);
}
charge_base = -1;
base_responsive = 0;
prev_current_base = 0;
prev_allow_charge_base = 0;
} else if (base_responsive) {
int old_flags = bd->flags;
int flags_changed;
int old_full_capacity = bd->full_capacity;
ec_ec_master_base_get_dynamic_info();
flags_changed = (old_flags != bd->flags);
/* Fetch static information when flags change. */
if (flags_changed)
ec_ec_master_base_get_static_info();
battery_memmap_refresh(BATT_IDX_BASE);
/* Newly connected battery, or change in capacity. */
if (old_flags & EC_BATT_FLAG_INVALID_DATA ||
((old_flags & EC_BATT_FLAG_BATT_PRESENT) !=
(bd->flags & EC_BATT_FLAG_BATT_PRESENT)) ||
old_full_capacity != bd->full_capacity)
host_set_single_event(EC_HOST_EVENT_BATTERY);
if (flags_changed)
host_set_single_event(EC_HOST_EVENT_BATTERY_STATUS);
/* Update charge_base */
if (bd->flags & (BATT_FLAG_BAD_FULL_CAPACITY |
BATT_FLAG_BAD_REMAINING_CAPACITY))
charge_base = -1;
else if (bd->full_capacity > 0)
charge_base = 100 * bd->remaining_capacity
/ bd->full_capacity;
else
charge_base = 0;
}
}
/**
* Setup current settings for base, and record previous values, if the base
* is responsive.
*
* @param current_base Current to be drawn by base (negative to provide power)
* @param allow_charge_base Whether base battery should be charged (only makes
* sense with positive current)
*/
static int set_base_current(int current_base, int allow_charge_base)
{
/* "OTG" voltage from base to lid. */
const int otg_voltage = db_policy.otg_voltage;
int ret;
ret = ec_ec_master_base_charge_control(current_base,
otg_voltage, allow_charge_base);
if (ret) {
/* Ignore errors until the base is responsive. */
if (base_responsive)
return ret;
} else {
base_responsive = 1;
prev_current_base = current_base;
prev_allow_charge_base = allow_charge_base;
}
return EC_RES_SUCCESS;
}
/**
* Setup current settings for lid and base, in a safe way.
*
* @param current_base Current to be drawn by base (negative to provide power)
* @param allow_charge_base Whether base battery should be charged (only makes
* sense with positive current)
* @param current_lid Current to be drawn by lid (negative to provide power)
* @param allow_charge_lid Whether lid battery should be charged
*/
static void set_base_lid_current(int current_base, int allow_charge_base,
int current_lid, int allow_charge_lid)
{
/* "OTG" voltage from lid to base. */
const int otg_voltage = db_policy.otg_voltage;
int lid_first;
int ret;
/* TODO(b:71881017): This is still quite verbose during charging. */
if (prev_current_base != current_base ||
prev_allow_charge_base != allow_charge_base ||
prev_current_lid != current_lid) {
CPRINTS("Base/Lid: %d%s/%d%s mA",
current_base, allow_charge_base ? "+" : "",
current_lid, allow_charge_lid ? "+" : "");
}
/*
* To decide whether to first control the lid or the base, we first
* control the side that _reduces_ current that would be drawn, then
* setup one that would start providing power, then increase current.
*/
if (current_lid >= 0 && current_lid < prev_current_lid)
lid_first = 1; /* Lid decreases current */
else if (current_base >= 0 && current_base < prev_current_base)
lid_first = 0; /* Base decreases current */
else if (current_lid < 0)
lid_first = 1; /* Lid provide power */
else
lid_first = 0; /* All other cases: control the base first */
if (!lid_first && base_connected) {
ret = set_base_current(current_base, allow_charge_base);
if (ret)
return;
}
if (current_lid >= 0) {
ret = charge_set_output_current_limit(0, 0);
if (ret)
return;
ret = charger_set_input_current(current_lid);
if (ret)
return;
if (allow_charge_lid)
ret = charge_request(curr.requested_voltage,
curr.requested_current);
else
ret = charge_request(0, 0);
} else {
ret = charge_set_output_current_limit(
-current_lid, otg_voltage);
}
if (ret)
return;
prev_current_lid = current_lid;
if (lid_first && base_connected) {
ret = set_base_current(current_base, allow_charge_base);
if (ret)
return;
}
/*
* Make sure cross-power is enabled (it might not be enabled right after
* plugging the base, or when an adapter just got connected).
*/
if (base_connected && current_base != 0)
board_enable_base_power(1);
}
/**
* Smooth power value, covering some edge cases.
* Compute s*curr+(1-s)*prev, where s is in 1/128 unit.
*/
static int smooth_value(int prev, int curr, int s)
{
if (curr < 0)
curr = 0;
if (prev < 0)
return curr;
return prev + s * (curr - prev) / 128;
}
/**
* Add margin m to value. Compute (1+m)*value, where m is in 1/128 unit.
*/
static int add_margin(int value, int m)
{
return value + m * value / 128;
}
static void charge_allocate_input_current_limit(void)
{
/*
* All the power numbers are in mW.
*
* Since we work with current and voltage in mA and mV, multiplying them
* gives numbers in uW, which are dangerously close to overflowing when
* doing intermediate computations (60W * 100 overflows a 32-bit int,
* for example). We therefore divide the product by 1000 and re-multiply
* the power numbers by 1000 when converting them back to current.
*/
int total_power = 0;
static int prev_base_battery_power = -1;
int base_battery_power = 0;
int base_battery_power_max = 0;
static int prev_lid_system_power = -1;
int lid_system_power;
static int prev_lid_battery_power = -1;
int lid_battery_power = 0;
int lid_battery_power_max = 0;
int power_base = 0;
int power_lid = 0;
int current_base = 0;
int current_lid = 0;
int charge_lid = charge_get_percent();
const struct ec_response_battery_dynamic_info *const base_bd =
&battery_dynamic[BATT_IDX_BASE];
if (!base_connected) {
set_base_lid_current(0, 0, curr.desired_input_current, 1);
prev_base_battery_power = -1;
return;
}
/* Charging */
if (curr.desired_input_current > 0 && curr.input_voltage > 0)
total_power =
curr.desired_input_current * curr.input_voltage / 1000;
/*
* TODO(b:71723024): We should be able to replace this test by curr.ac,
* but the value is currently wrong, especially during transitions.
*/
if (total_power <= 0) {
int base_critical = charge_base >= 0 &&
charge_base < db_policy.max_charge_base_batt_to_batt;
/* Discharging */
prev_base_battery_power = -1;
prev_lid_system_power = -1;
prev_lid_battery_power = -1;
/* Manual control */
if (manual_noac_enabled) {
int lid_current, base_current;
if (manual_noac_current_base > 0) {
base_current = -manual_noac_current_base;
lid_current =
add_margin(manual_noac_current_base,
db_policy.margin_otg_current);
} else {
lid_current = manual_noac_current_base;
base_current =
add_margin(-manual_noac_current_base,
db_policy.margin_otg_current);
}
set_base_lid_current(base_current, 0, lid_current, 0);
return;
}
/*
* System is off, cut power to the base. We'll reset the base
* when system restarts, or when AC is plugged.
*/
if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
set_base_lid_current(0, 0, 0, 0);
if (base_responsive) {
/* Base still responsive, put it to sleep. */
CPRINTF("Hibernating base\n");
ec_ec_master_hibernate();
base_responsive = 0;
board_enable_base_power(0);
}
return;
}
/*
* System is suspended, let the lid and base run on their
* own power. However, if the base battery is critically low, we
* still want to provide power to the base, to make sure it
* stays alive to be able to wake the system on keyboard or
* touchpad events.
*/
if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND) &&
!base_critical) {
set_base_lid_current(0, 0, 0, 0);
return;
}
if (charge_base > db_policy.min_charge_base_otg) {
int lid_current = db_policy.max_base_to_lid_current;
int base_current = add_margin(lid_current,
db_policy.margin_otg_current);
/* Draw current from base to lid */
set_base_lid_current(-base_current, 0, lid_current,
charge_lid < db_policy.max_charge_lid_batt_to_batt);
} else {
/*
* Base battery is too low, apply power to it, and allow
* it to charge if it is critically low.
*
* TODO(b:71881017): When suspended, this will make the
* battery charge oscillate between 3 and 4 percent,
* which might not be great for battery life. We need
* some hysteresis.
*/
/*
* TODO(b:71881017): Precompute (ideally, at build time)
* the base_current, so we do not need to do a division
* here.
*/
int base_current =
(db_policy.min_base_system_power * 1000) /
db_policy.otg_voltage;
int lid_current = add_margin(base_current,
db_policy.margin_otg_current);
set_base_lid_current(base_current, base_critical,
-lid_current, 0);
}
return;
}
/* Manual control */
if (manual_ac_current_base >= 0) {
int current_base = manual_ac_current_base;
int current_lid =
curr.desired_input_current - manual_ac_current_base;
if (current_lid < 0) {
current_base = curr.desired_input_current;
current_lid = 0;
}
set_base_lid_current(current_base, 1, current_lid, 1);
return;
}
/* Estimate system power. */
lid_system_power = charger_get_system_power() / 1000;
/* Smooth system power, as it is very spiky */
lid_system_power = smooth_value(prev_lid_system_power,
lid_system_power, db_policy.lid_system_power_smooth);
prev_lid_system_power = lid_system_power;
/*
* TODO(b:71881017): Smoothing the battery power isn't necessarily a
* good idea: if the system takes up too much power, we may reduce the
* estimate power too quickly, leading to oscillations when the system
* power goes down. Instead, we should probably estimate the current
* based on remaining capacity.
*/
/* Estimate lid battery power. */
if (!(curr.batt.flags &
(BATT_FLAG_BAD_VOLTAGE | BATT_FLAG_BAD_CURRENT)))
lid_battery_power = curr.batt.current *
curr.batt.voltage / 1000;
if (lid_battery_power < prev_lid_battery_power)
lid_battery_power = smooth_value(prev_lid_battery_power,
lid_battery_power, db_policy.battery_power_smooth);
if (!(curr.batt.flags &
(BATT_FLAG_BAD_DESIRED_VOLTAGE |
BATT_FLAG_BAD_DESIRED_CURRENT)))
lid_battery_power_max = curr.batt.desired_current *
curr.batt.desired_voltage / 1000;
lid_battery_power = MIN(lid_battery_power, lid_battery_power_max);
/* Estimate base battery power. */
if (!(base_bd->flags & EC_BATT_FLAG_INVALID_DATA)) {
base_battery_power = base_bd->actual_current *
base_bd->actual_voltage / 1000;
base_battery_power_max = base_bd->desired_current *
base_bd->desired_voltage / 1000;
}
if (base_battery_power < prev_base_battery_power)
base_battery_power = smooth_value(prev_base_battery_power,
base_battery_power, db_policy.battery_power_smooth);
base_battery_power = MIN(base_battery_power, base_battery_power_max);
if (debugging) {
CPRINTF("%s:\n", __func__);
CPRINTF("total power: %d\n", total_power);
CPRINTF("base battery power: %d (%d)\n",
base_battery_power, base_battery_power_max);
CPRINTF("lid system power: %d\n", lid_system_power);
CPRINTF("lid battery power: %d\n", lid_battery_power);
CPRINTF("percent base/lid: %d%% %d%%\n",
charge_base, charge_lid);
}
prev_lid_battery_power = lid_battery_power;
prev_base_battery_power = base_battery_power;
if (total_power > 0) { /* Charging */
/* Allocate system power */
CHG_ALLOCATE(power_base, total_power,
db_policy.min_base_system_power);
CHG_ALLOCATE(power_lid, total_power, lid_system_power);
/* Allocate lid, then base battery power */
lid_battery_power = add_margin(lid_battery_power,
db_policy.margin_lid_battery_power);
CHG_ALLOCATE(power_lid, total_power, lid_battery_power);
base_battery_power = add_margin(base_battery_power,
db_policy.margin_base_battery_power);
CHG_ALLOCATE(power_base, total_power, base_battery_power);
/* Give everything else to the lid. */
CHG_ALLOCATE(power_lid, total_power, total_power);
if (debugging)
CPRINTF("power: base %d mW / lid %d mW\n",
power_base, power_lid);
current_base = 1000 * power_base / curr.input_voltage;
current_lid = 1000 * power_lid / curr.input_voltage;
if (current_base > db_policy.max_lid_to_base_current) {
current_lid += (current_base
- db_policy.max_lid_to_base_current);
current_base = db_policy.max_lid_to_base_current;
}
if (debugging)
CPRINTF("current: base %d mA / lid %d mA\n",
current_base, current_lid);
set_base_lid_current(current_base, 1, current_lid, 1);
} else { /* Discharging */
}
if (debugging)
CPRINTF("====\n");
}
#endif /* CONFIG_EC_EC_COMM_BATTERY_MASTER */
#ifndef CONFIG_BATTERY_V2
/* Returns zero if every item was updated. */
static int update_static_battery_info(void)
{
char *batt_str;
int batt_serial;
uint8_t batt_flags = 0;
/*
* The return values have type enum ec_error_list, but EC_SUCCESS is
* zero. We'll just look for any failures so we can try them all again.
*/
int rv;
/* 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);
rv = battery_serial_number(&batt_serial);
if (!rv)
snprintf(batt_str, EC_MEMMAP_TEXT_MAX, "%04X", batt_serial);
/* Design Capacity of Full */
rv |= battery_design_capacity(
(int *)host_get_memmap(EC_MEMMAP_BATT_DCAP));
/* Design Voltage */
rv |= battery_design_voltage(
(int *)host_get_memmap(EC_MEMMAP_BATT_DVLT));
/* Last Full Charge Capacity (this is only mostly static) */
rv |= battery_full_charge_capacity(
(int *)host_get_memmap(EC_MEMMAP_BATT_LFCC));
/* Cycle Count */
rv |= 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);
rv |= 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);
rv |= battery_device_name(batt_str, EC_MEMMAP_TEXT_MAX);
/* Battery Type string */
batt_str = (char *)host_get_memmap(EC_MEMMAP_BATT_TYPE);
rv |= battery_device_chemistry(batt_str, EC_MEMMAP_TEXT_MAX);
/* Zero the dynamic entries. They'll come next. */
*(int *)host_get_memmap(EC_MEMMAP_BATT_VOLT) = 0;
*(int *)host_get_memmap(EC_MEMMAP_BATT_RATE) = 0;
*(int *)host_get_memmap(EC_MEMMAP_BATT_CAP) = 0;
*(int *)host_get_memmap(EC_MEMMAP_BATT_LFCC) = 0;
if (extpower_is_present())
batt_flags |= EC_BATT_FLAG_AC_PRESENT;
*host_get_memmap(EC_MEMMAP_BATT_FLAG) = batt_flags;
if (rv)
problem(PR_STATIC_UPDATE, rv);
else
/* No errors seen. Battery data is now present */
*host_get_memmap(EC_MEMMAP_BATTERY_VERSION) = 1;
return rv;
}
static void update_dynamic_battery_info(void)
{
/* The memmap address is constant. We should fix these calls somehow. */
int *memmap_volt = (int *)host_get_memmap(EC_MEMMAP_BATT_VOLT);
int *memmap_rate = (int *)host_get_memmap(EC_MEMMAP_BATT_RATE);
int *memmap_cap = (int *)host_get_memmap(EC_MEMMAP_BATT_CAP);
int *memmap_lfcc = (int *)host_get_memmap(EC_MEMMAP_BATT_LFCC);
uint8_t *memmap_flags = host_get_memmap(EC_MEMMAP_BATT_FLAG);
uint8_t tmp;
int send_batt_status_event = 0;
int send_batt_info_event = 0;
static int __bss_slow batt_present;
tmp = 0;
if (curr.ac)
tmp |= EC_BATT_FLAG_AC_PRESENT;
if (curr.batt.is_present == BP_YES) {
tmp |= EC_BATT_FLAG_BATT_PRESENT;
batt_present = 1;
/* Tell the AP to read battery info if it is newly present. */
if (!(*memmap_flags & EC_BATT_FLAG_BATT_PRESENT))
send_batt_info_event++;
} else {
/*
* Require two consecutive updates with BP_NOT_SURE
* before reporting it gone to the host.
*/
if (batt_present)
tmp |= EC_BATT_FLAG_BATT_PRESENT;
else if (*memmap_flags & EC_BATT_FLAG_BATT_PRESENT)
send_batt_info_event++;
batt_present = 0;
}
if (curr.batt.flags & EC_BATT_FLAG_INVALID_DATA)
tmp |= EC_BATT_FLAG_INVALID_DATA;
if (!(curr.batt.flags & BATT_FLAG_BAD_VOLTAGE))
*memmap_volt = curr.batt.voltage;
if (!(curr.batt.flags & BATT_FLAG_BAD_CURRENT))
*memmap_rate = ABS(curr.batt.current);
if (!(curr.batt.flags & BATT_FLAG_BAD_REMAINING_CAPACITY)) {
/*
* If we're running off the battery, it must have some charge.
* Don't report zero charge, as that has special meaning
* to Chrome OS powerd.
*/
if (curr.batt.remaining_capacity == 0 && !curr.batt_is_charging)
*memmap_cap = 1;
else
*memmap_cap = curr.batt.remaining_capacity;
}
if (!(curr.batt.flags & BATT_FLAG_BAD_FULL_CAPACITY) &&
(curr.batt.full_capacity <= (*memmap_lfcc - LFCC_EVENT_THRESH) ||
curr.batt.full_capacity >= (*memmap_lfcc + LFCC_EVENT_THRESH))) {
*memmap_lfcc = curr.batt.full_capacity;
/* Poke the AP if the full_capacity changes. */
send_batt_info_event++;
}
if (curr.batt.is_present == BP_YES &&
!(curr.batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE) &&
curr.batt.state_of_charge <= BATTERY_LEVEL_CRITICAL)
tmp |= EC_BATT_FLAG_LEVEL_CRITICAL;
tmp |= curr.batt_is_charging ? EC_BATT_FLAG_CHARGING :
EC_BATT_FLAG_DISCHARGING;
/* Tell the AP to re-read battery status if charge state changes */
if (*memmap_flags != tmp)
send_batt_status_event++;
/* Update flags before sending host events. */
*memmap_flags = tmp;
if (send_batt_info_event)
host_set_single_event(EC_HOST_EVENT_BATTERY);
if (send_batt_status_event)
host_set_single_event(EC_HOST_EVENT_BATTERY_STATUS);
}
#else /* CONFIG_BATTERY_V2 */
static int update_static_battery_info(void)
{
int batt_serial;
int val;
/*
* The return values have type enum ec_error_list, but EC_SUCCESS is
* zero. We'll just look for any failures so we can try them all again.
*/
int rv, ret;
struct ec_response_battery_static_info *const bs =
&battery_static[BATT_IDX_MAIN];
/* Clear all static information. */
memset(bs, 0, sizeof(*bs));
/* Smart battery serial number is 16 bits */
rv = battery_serial_number(&batt_serial);
if (!rv)
snprintf(bs->serial, sizeof(bs->serial), "%04X", batt_serial);
/* Design Capacity of Full */
ret = battery_design_capacity(&val);
if (!ret)
bs->design_capacity = val;
rv |= ret;
/* Design Voltage */
ret = battery_design_voltage(&val);
if (!ret)
bs->design_voltage = val;
rv |= ret;
/* Cycle Count */
ret = battery_cycle_count(&val);
if (!ret)
bs->cycle_count = val;
rv |= ret;
/* Battery Manufacturer string */
rv |= battery_manufacturer_name(bs->manufacturer,
sizeof(bs->manufacturer));
/* Battery Model string */
rv |= battery_device_name(bs->model, sizeof(bs->model));
/* Battery Type string */
rv |= battery_device_chemistry(bs->type, sizeof(bs->type));
/* Zero the dynamic entries. They'll come next. */
memset(&battery_dynamic[BATT_IDX_MAIN], 0,
sizeof(battery_dynamic[BATT_IDX_MAIN]));
if (rv)
problem(PR_STATIC_UPDATE, rv);
#ifdef HAS_TASK_HOSTCMD
battery_memmap_refresh(BATT_IDX_MAIN);
#endif
return rv;
}
static void update_dynamic_battery_info(void)
{
static int __bss_slow batt_present;
uint8_t tmp;
int send_batt_status_event = 0;
int send_batt_info_event = 0;
struct ec_response_battery_dynamic_info *const bd =
&battery_dynamic[BATT_IDX_MAIN];
tmp = 0;
if (curr.ac)
tmp |= EC_BATT_FLAG_AC_PRESENT;
if (curr.batt.is_present == BP_YES) {
tmp |= EC_BATT_FLAG_BATT_PRESENT;
batt_present = 1;
/* Tell the AP to read battery info if it is newly present. */
if (!(bd->flags & EC_BATT_FLAG_BATT_PRESENT))
send_batt_info_event++;
} else {
/*
* Require two consecutive updates with BP_NOT_SURE
* before reporting it gone to the host.
*/
if (batt_present)
tmp |= EC_BATT_FLAG_BATT_PRESENT;
else if (bd->flags & EC_BATT_FLAG_BATT_PRESENT)
send_batt_info_event++;
batt_present = 0;
}
if (curr.batt.flags & EC_BATT_FLAG_INVALID_DATA)
tmp |= EC_BATT_FLAG_INVALID_DATA;
if (!(curr.batt.flags & BATT_FLAG_BAD_VOLTAGE))
bd->actual_voltage = curr.batt.voltage;
if (!(curr.batt.flags & BATT_FLAG_BAD_CURRENT))
bd->actual_current = curr.batt.current;
if (!(curr.batt.flags & BATT_FLAG_BAD_DESIRED_VOLTAGE))
bd->desired_voltage = curr.batt.desired_voltage;
if (!(curr.batt.flags & BATT_FLAG_BAD_DESIRED_CURRENT))
bd->desired_current = curr.batt.desired_current;
if (!(curr.batt.flags & BATT_FLAG_BAD_REMAINING_CAPACITY)) {
/*
* If we're running off the battery, it must have some charge.
* Don't report zero charge, as that has special meaning
* to Chrome OS powerd.
*/
if (curr.batt.remaining_capacity == 0 && !curr.batt_is_charging)
bd->remaining_capacity = 1;
else
bd->remaining_capacity = curr.batt.remaining_capacity;
}
if (!(curr.batt.flags & BATT_FLAG_BAD_FULL_CAPACITY) &&
(curr.batt.full_capacity <=
(bd->full_capacity - LFCC_EVENT_THRESH) ||
curr.batt.full_capacity >=
(bd->full_capacity + LFCC_EVENT_THRESH))) {
bd->full_capacity = curr.batt.full_capacity;
/* Poke the AP if the full_capacity changes. */
send_batt_info_event++;
}
if (curr.batt.is_present == BP_YES &&
!(curr.batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE) &&
curr.batt.state_of_charge <= BATTERY_LEVEL_CRITICAL)
tmp |= EC_BATT_FLAG_LEVEL_CRITICAL;
tmp |= curr.batt_is_charging ? EC_BATT_FLAG_CHARGING :
EC_BATT_FLAG_DISCHARGING;
/* Tell the AP to re-read battery status if charge state changes */
if (bd->flags != tmp)
send_batt_status_event++;
bd->flags = tmp;
#ifdef HAS_TASK_HOSTCMD
battery_memmap_refresh(BATT_IDX_MAIN);
#endif
#ifdef CONFIG_HOSTCMD_EVENTS
if (send_batt_info_event)
host_set_single_event(EC_HOST_EVENT_BATTERY);
if (send_batt_status_event)
host_set_single_event(EC_HOST_EVENT_BATTERY_STATUS);
#endif
}
#endif /* CONFIG_BATTERY_V2 */
static const char * const state_list[] = {
"idle", "discharge", "charge", "precharge"
};
BUILD_ASSERT(ARRAY_SIZE(state_list) == NUM_STATES_V2);
static const char * const batt_pres[] = {
"NO", "YES", "NOT_SURE",
};
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");
cflush();
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]);
cflush();
DUMP(requested_voltage, "%dmV");
DUMP(requested_current, "%dmA");
#ifdef CONFIG_CHARGER_OTG
DUMP(output_current, "%dmA");
#endif
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
DUMP(input_voltage, "%dmV");
#endif
ccprintf("chg_ctl_mode = %d\n", chg_ctl_mode);
ccprintf("manual_voltage = %d\n", manual_voltage);
ccprintf("manual_current = %d\n", manual_current);
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
}
static void show_charging_progress(void)
{
int rv = 0, minutes, to_full;
#ifdef CONFIG_BATTERY_SMART
/*
* Predicted remaining battery capacity based on AverageCurrent().
* 65535 = Battery is not being discharged.
*/
if (!battery_time_to_empty(&minutes) && minutes != 65535)
to_full = 0;
/*
* Predicted time-to-full charge based on AverageCurrent().
* 65535 = Battery is not being discharged.
*/
else if (!battery_time_to_full(&minutes) && minutes != 65535)
to_full = 1;
/*
* If both time to empty and time to full have invalid data, consider
* measured current from the coulomb counter and ac present status to
* decide whether battery is about to full or empty.
*/
else {
to_full = curr.batt_is_charging;
rv = EC_ERROR_UNKNOWN;
}
#else
if (!curr.batt_is_charging) {
rv = battery_time_to_empty(&minutes);
to_full = 0;
} else {
rv = battery_time_to_full(&minutes);
to_full = 1;
}
#endif
if (rv)
CPRINTS("Battery %d%% / ??h:?? %s%s",
curr.batt.state_of_charge,
to_full ? "to full" : "to empty",
is_full ? ", not accepting current" : "");
else
CPRINTS("Battery %d%% / %dh:%d %s%s",
curr.batt.state_of_charge,
minutes / 60, minutes % 60,
to_full ? "to full" : "to empty",
is_full ? ", not accepting current" : "");
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
CPRINTS("Base battery %d%%", charge_base);
#endif
if (debugging) {
ccprintf("battery:\n");
print_battery_debug();
ccprintf("charger:\n");
print_charger_debug();
ccprintf("chg:\n");
dump_charge_state();
}
}
/* Calculate if battery is full based on whether it is accepting charge */
static int calc_is_full(void)
{
static int __bss_slow ret;
/* If bad state of charge reading, return last value */
if (curr.batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE ||
curr.batt.state_of_charge > 100)
return ret;
/*
* Battery is full when SoC is above 90% and battery desired current
* is 0. This is necessary because some batteries stop charging when
* the SoC still reports <100%, so we need to check desired current
* to know if it is actually full.
*/
ret = (curr.batt.state_of_charge >= 90 &&
curr.batt.desired_current == 0);
return ret;
}
/*
* Ask the charger for some voltage and current. If either value is 0,
* charging is disabled; otherwise it's enabled. Negative values are ignored.
*/
static int charge_request(int voltage, int current)
{
int r1 = EC_SUCCESS, r2 = EC_SUCCESS, r3 = EC_SUCCESS;
static int __bss_slow prev_volt, prev_curr;
if (!voltage || !current) {
#ifdef CONFIG_CHARGER_NARROW_VDC
current = 0;
/*
* With NVDC charger, keep VSYS voltage higher than battery,
* otherwise the BGATE FET body diode would conduct and
* discharge the battery.
*/
voltage = charger_closest_voltage(
curr.batt.voltage + charger_get_info()->voltage_step);
/* If the battery is full, request the max voltage. */
if (is_full)
voltage = battery_get_info()->voltage_max;
/* And handle dead battery case */
voltage = MAX(voltage, battery_get_info()->voltage_normal);
#else
voltage = current = 0;
#endif
}
if (curr.ac) {
if (prev_volt != voltage || prev_curr != current)
CPRINTS("%s(%dmV, %dmA)", __func__, voltage, current);
}
/*
* Set current before voltage so that if we are just starting
* to charge, we allow some time (i2c delay) for charging circuit to
* start at a voltage just above battery voltage before jumping
* up. This helps avoid large current spikes when connecting
* battery.
*/
if (current >= 0)
r2 = charger_set_current(current);
if (r2 != EC_SUCCESS)
problem(PR_SET_CURRENT, r2);
if (voltage >= 0)
r1 = charger_set_voltage(voltage);
if (r1 != EC_SUCCESS)
problem(PR_SET_VOLTAGE, r1);
/*
* Set the charge inhibit bit when possible as it appears to save
* power in some cases (e.g. Nyan with BQ24735).
*/
if (voltage > 0 || current > 0)
r3 = charger_set_mode(0);
else
r3 = charger_set_mode(CHARGE_FLAG_INHIBIT_CHARGE);
if (r3 != EC_SUCCESS)
problem(PR_SET_MODE, r3);
/*
* Only update if the request worked, so we'll keep trying on failures.
*/
if (!r1 && !r2) {
prev_volt = voltage;
prev_curr = current;
}
return r1 ? r1 : r2;
}
void chgstate_set_manual_current(int curr_ma)
{
if (curr_ma < 0)
manual_current = -1;
else
manual_current = charger_closest_current(curr_ma);
}
void chgstate_set_manual_voltage(int volt_mv)
{
manual_voltage = charger_closest_voltage(volt_mv);
}
/* Force charging off before the battery is full. */
static int set_chg_ctrl_mode(enum ec_charge_control_mode mode)
{
if (mode == CHARGE_CONTROL_NORMAL) {
chg_ctl_mode = mode;
manual_current = -1;
manual_voltage = -1;
} else {
/*
* Changing mode is only meaningful if external power is
* present. If it's not present we can't charge anyway.
*/
if (!curr.ac)
return EC_ERROR_NOT_POWERED;
chg_ctl_mode = mode;
manual_current = 0;
manual_voltage = 0;
}
return EC_SUCCESS;
}
/* True if we know the battery temp is too high or too low */
static inline int battery_too_hot(int batt_temp_c)
{
return (!(curr.batt.flags & BATT_FLAG_BAD_TEMPERATURE) &&
(batt_temp_c > batt_info->discharging_max_c ||
batt_temp_c < batt_info->discharging_min_c));
}
/* True if we know the charge is too low, or we know the voltage is too low. */
static inline int battery_too_low(void)
{
return ((!(curr.batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE) &&
curr.batt.state_of_charge < BATTERY_LEVEL_SHUTDOWN) ||
(!(curr.batt.flags & BATT_FLAG_BAD_VOLTAGE) &&
curr.batt.voltage <= batt_info->voltage_min));
}
/*
* If the battery is at extremely low charge (and discharging) or extremely
* high temperature, the EC will notify the AP and start a timer. If the
* critical condition is not corrected before the timeout expires, the EC
* will shut down the AP (if the AP is not already off) and then optionally
* hibernate or cut off battery.
*/
static int 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 battery_critical;
}
if (!shutdown_warning_time.val) {
CPRINTS("charge warn shutdown due to critical battery");
shutdown_warning_time = get_time();
#ifdef CONFIG_HOSTCMD_EVENTS
if (!chipset_in_state(CHIPSET_STATE_ANY_OFF))
host_set_single_event(EC_HOST_EVENT_BATTERY_SHUTDOWN);
#endif
} else if (get_time().val > shutdown_warning_time.val +
CRITICAL_BATTERY_SHUTDOWN_TIMEOUT_US) {
if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
/* Timeout waiting for charger to provide more power */
#if defined(CONFIG_BATTERY_CRITICAL_SHUTDOWN_CUT_OFF)
#ifdef CONFIG_BATTERY_CRITICAL_CUT_OFF_CUSTOM_CONDITION
if (!board_critical_shutdown_check(&curr))
return battery_critical;
#endif /* CONFIG_BATTERY_CRITICAL_CUT_OFF_CUSTOM_CONDITION */
CPRINTS(
"charge force battery cut-off due to critical level");
board_cut_off_battery();
#elif defined(CONFIG_HIBERNATE)
CPRINTS(
"charge force EC hibernate due to critical battery");
system_hibernate(0, 0);
#endif
} else {
/* Timeout waiting for AP to shut down, so kill it */
CPRINTS(
"charge force shutdown due to critical battery");
chipset_force_shutdown(CHIPSET_SHUTDOWN_BATTERY_CRIT);
}
}
return battery_critical;
}
/*
* Send host events as the battery charge drops below certain thresholds.
* We handle forced shutdown and other actions elsewhere; this is just for the
* host events. We send these even if the AP is off, since the AP will read and
* discard any events it doesn't care about the next time it wakes up.
*/
static void notify_host_of_low_battery_charge(void)
{
/* We can't tell what the current charge is. Assume it's okay. */
if (curr.batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE)
return;
#ifdef CONFIG_HOSTCMD_EVENTS
if (curr.batt.state_of_charge <= BATTERY_LEVEL_LOW &&
prev_charge > BATTERY_LEVEL_LOW)
host_set_single_event(EC_HOST_EVENT_BATTERY_LOW);
if (curr.batt.state_of_charge <= BATTERY_LEVEL_CRITICAL &&
prev_charge > BATTERY_LEVEL_CRITICAL)
host_set_single_event(EC_HOST_EVENT_BATTERY_CRITICAL);
#endif
}
static void set_charge_state(enum charge_state_v2 state)
{
prev_state = curr.state;
curr.state = state;
}
static void notify_host_of_low_battery_voltage(void)
{
#ifdef CONFIG_THROTTLE_AP_ON_BAT_VOLTAGE
if ((curr.batt.flags & BATT_FLAG_BAD_VOLTAGE) ||
chipset_in_state(CHIPSET_STATE_ANY_OFF))
return;
if (!uvp_throttle_start_time.val &&
(curr.batt.voltage < BAT_LOW_VOLTAGE_THRESH)) {
throttle_ap(THROTTLE_ON, THROTTLE_SOFT,
THROTTLE_SRC_BAT_VOLTAGE);
uvp_throttle_start_time = get_time();
} else if (uvp_throttle_start_time.val &&
(curr.batt.voltage < BAT_LOW_VOLTAGE_THRESH +
BAT_UVP_HYSTERESIS)) {
/*
* Reset the timer when we are not sure if VBAT can stay
* above BAT_LOW_VOLTAGE_THRESH after we stop throttling.
*/
uvp_throttle_start_time = get_time();
} else if (uvp_throttle_start_time.val &&
(get_time().val > uvp_throttle_start_time.val +
BAT_UVP_TIMEOUT_US)) {
throttle_ap(THROTTLE_OFF, THROTTLE_SOFT,
THROTTLE_SRC_BAT_VOLTAGE);
uvp_throttle_start_time.val = 0;
}
#endif
}
static void notify_host_of_over_current(struct batt_params *batt)
{
#ifdef CONFIG_THROTTLE_AP_ON_BAT_DISCHG_CURRENT
static timestamp_t ocp_throttle_start_time;
if (batt->flags & BATT_FLAG_BAD_CURRENT)
return;
if ((!ocp_throttle_start_time.val &&
(batt->current < -BAT_MAX_DISCHG_CURRENT)) ||
(ocp_throttle_start_time.val &&
(batt->current < -BAT_MAX_DISCHG_CURRENT + BAT_OCP_HYSTERESIS))) {
ocp_throttle_start_time = get_time();
throttle_ap(THROTTLE_ON, THROTTLE_SOFT,
THROTTLE_SRC_BAT_DISCHG_CURRENT);
} else if (ocp_throttle_start_time.val &&
(get_time().val > ocp_throttle_start_time.val +
BAT_OCP_TIMEOUT_US)) {
/*
* Clear the timer and notify AP to stop throttling if
* we haven't seen over current for BAT_OCP_TIMEOUT_US.
*/
ocp_throttle_start_time.val = 0;
throttle_ap(THROTTLE_OFF, THROTTLE_SOFT,
THROTTLE_SRC_BAT_DISCHG_CURRENT);
}
#endif
}
const struct batt_params *charger_current_battery_params(void)
{
return &curr.batt;
}
/*****************************************************************************/
/* Hooks */
void charger_init(void)
{
/* Initialize current state */
memset(&curr, 0, sizeof(curr));
curr.batt.is_present = BP_NOT_SURE;
/* Manual voltage/current set to off */
manual_voltage = -1;
manual_current = -1;
}
DECLARE_HOOK(HOOK_INIT, charger_init, HOOK_PRIO_DEFAULT);
/* Wake up the task when something important happens */
static void charge_wakeup(void)
{
task_wake(TASK_ID_CHARGER);
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, charge_wakeup, HOOK_PRIO_DEFAULT);
DECLARE_HOOK(HOOK_AC_CHANGE, charge_wakeup, HOOK_PRIO_DEFAULT);
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
/* Reset the base on S5->S0 transition. */
DECLARE_HOOK(HOOK_CHIPSET_STARTUP, board_base_reset, HOOK_PRIO_DEFAULT);
#endif
#ifdef CONFIG_THROTTLE_AP_ON_BAT_VOLTAGE
static void bat_low_voltage_throttle_reset(void)
{
uvp_throttle_start_time.val = 0;
}
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN,
bat_low_voltage_throttle_reset,
HOOK_PRIO_DEFAULT);
#endif
static int get_desired_input_current(enum battery_present batt_present,
const struct charger_info * const info)
{
if (batt_present == BP_YES || system_is_locked() || base_connected) {
#ifdef CONFIG_CHARGE_MANAGER
int ilim = charge_manager_get_charger_current();
return ilim == CHARGE_CURRENT_UNINITIALIZED ?
CHARGE_CURRENT_UNINITIALIZED :
MAX(CONFIG_CHARGER_INPUT_CURRENT, ilim);
#else
return CONFIG_CHARGER_INPUT_CURRENT;
#endif
} else {
#ifdef CONFIG_USB_POWER_DELIVERY
return MIN(PD_MAX_CURRENT_MA, info->input_current_max);
#else
return info->input_current_max;
#endif
}
}
/* Main loop */
void charger_task(void *u)
{
int sleep_usec;
int battery_critical;
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;
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
base_responsive = 0;
curr.input_voltage = CHARGE_VOLTAGE_UNINITIALIZED;
battery_dynamic[BATT_IDX_BASE].flags = EC_BATT_FLAG_INVALID_DATA;
charge_base = -1;
#endif
/*
* 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 = BP_NOT_INIT;
curr.desired_input_current = get_desired_input_current(
curr.batt.is_present, info);
while (1) {
/* Let's see what's going on... */
curr.ts = get_time();
sleep_usec = 0;
problems_exist = 0;
battery_critical = 0;
curr.ac = extpower_is_present();
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
/*
* When base is powering the system, make sure curr.ac stays 0.
* TODO(b:71723024): Fix extpower_is_present() in hardware
* instead.
*/
if (base_responsive && prev_current_base < 0)
curr.ac = 0;
/* System is off: if AC gets connected, reset the base. */
if (chipset_in_state(CHIPSET_STATE_ANY_OFF) &&
!prev_ac && curr.ac)
board_base_reset();
#endif
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;
}
}
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
update_base_battery_info();
#endif
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;
}
notify_host_of_over_current(&curr.batt);
/*
* 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) {
if (!curr.ac)
CPRINTS("running with no battery and no AC");
set_charge_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. */
battery_critical = shutdown_on_critical_battery();
if (!curr.ac) {
set_charge_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) {
set_charge_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 */
set_charge_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;
set_charge_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;
}
set_charge_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
/*
* Always check the disconnect state. This is because
* the battery disconnect state is one of the items used
* to decide whether or not to leave safe mode.
*/
battery_seems_to_be_disconnected =
battery_get_disconnect_state() ==
BATTERY_DISCONNECTED;
if (curr.requested_voltage == 0 &&
curr.requested_current == 0 &&
battery_seems_to_be_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;
} 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;
set_charge_state(ST_CHARGE);
}
wait_for_it:
#ifdef CONFIG_CHARGER_PROFILE_OVERRIDE
if (chg_ctl_mode == CHARGE_CONTROL_NORMAL) {
sleep_usec = charger_profile_override(&curr);
if (sleep_usec < 0)
problem(PR_CUSTOM, sleep_usec);
}
#endif
#ifdef CONFIG_CHARGE_MANAGER
if (curr.batt.state_of_charge >=
CONFIG_CHARGE_MANAGER_BAT_PCT_SAFE_MODE_EXIT &&
!battery_seems_to_be_disconnected) {
/*
* Sometimes the fuel gauge will report that it has
* sufficient state of charge and remaining capacity,
* but in actuality it doesn't. When the EC sees that
* information, it trusts it and leaves charge manager
* safe mode. Doing so will allow CHARGE_PORT_NONE to
* be selected, thereby cutting off the input FETs.
* When the battery cannot provide the charge it claims,
* the system loses power, shuts down, and the battery
* is not charged even though the charger is plugged in.
* By waiting 500ms, we can avoid the selection of
* CHARGE_PORT_NONE around init time and not cut off the
* input FETs.
*/
msleep(500);
charge_manager_leave_safe_mode();
}
#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_charge();
notify_host_of_low_battery_voltage();
/* 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) ||
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
(charge_base != prev_charge_base) ||
#endif
(is_full != prev_full) ||
(curr.state != prev_state)) {
show_charging_progress();
prev_charge = curr.batt.state_of_charge;
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
prev_charge_base = charge_base;
#endif
hook_notify(HOOK_BATTERY_SOC_CHANGE);
}
prev_full = is_full;
#ifndef CONFIG_CHARGER_MAINTAIN_VBAT
/* 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;
}
#endif
/* 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()) {
curr.requested_voltage = 0;
curr.requested_current = 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_voltage != -1)
curr.requested_voltage = manual_voltage;
if (manual_current != -1)
curr.requested_current = manual_current;
}
} else {
#ifndef CONFIG_CHARGER_MAINTAIN_VBAT
curr.requested_voltage = charger_closest_voltage(
curr.batt.voltage + info->voltage_step);
curr.requested_current = -1;
#endif
#ifdef CONFIG_EC_EC_COMM_BATTERY_SLAVE
/*
* On EC-EC slave, do not charge if curr.ac is 0: there
* might still be some external power available but we
* do not want to use it for charging.
*/
curr.requested_current = 0;
#endif
}
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
charge_allocate_input_current_limit();
#else
charge_request(curr.requested_voltage, curr.requested_current);
#endif
/* 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.ac &&
(curr.state == ST_IDLE ||
curr.state == ST_DISCHARGE)) {
#ifdef CONFIG_CHARGER_OTG
int output_current = curr.output_current;
#else
int output_current = 0;
#endif
/*
* If AP is off and we do not provide power, we
* can sleep a long time.
*/
if (chipset_in_state(CHIPSET_STATE_ANY_OFF |
CHIPSET_STATE_ANY_SUSPEND)
&& output_current == 0)
sleep_usec =
CHARGE_POLL_PERIOD_VERY_LONG;
else
/* Discharging, not too urgent */
sleep_usec = CHARGE_POLL_PERIOD_LONG;
} else {
/* AC present, 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;
/*
* If battery is critical, ensure that the sleep time is not
* very long since we might want to hibernate or cut-off
* battery sooner.
*/
if (battery_critical &&
(sleep_usec > CRITICAL_BATTERY_SHUTDOWN_TIMEOUT_US))
sleep_usec = CRITICAL_BATTERY_SHUTDOWN_TIMEOUT_US;
task_wait_event(sleep_usec);
}
}
/*****************************************************************************/
/* Exported functions */
int charge_want_shutdown(void)
{
return (curr.state == ST_DISCHARGE) &&
!(curr.batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE) &&
(curr.batt.state_of_charge < BATTERY_LEVEL_SHUTDOWN);
}
int charge_prevent_power_on(int power_button_pressed)
{
int prevent_power_on = 0;
struct batt_params params;
struct batt_params *current_batt_params = &curr.batt;
#ifdef CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON
static int automatic_power_on = 1;
#endif
/* If battery params seem uninitialized then retrieve them */
if (current_batt_params->is_present == BP_NOT_SURE) {
battery_get_params(&params);
current_batt_params = &params;
}
#ifdef CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON
/*
* Remember that a power button was pressed, and assume subsequent
* power-ups are user-requested and non-automatic.
*/
if (power_button_pressed)
automatic_power_on = 0;
/*
* Require a minimum battery level to power on and ensure that the
* battery can provide power to the system.
*/
if (current_batt_params->is_present != BP_YES ||
#ifdef CONFIG_BATTERY_MEASURE_IMBALANCE
(current_batt_params->flags & BATT_FLAG_IMBALANCED_CELL &&
current_batt_params->state_of_charge <
CONFIG_CHARGER_MIN_BAT_PCT_IMBALANCED_POWER_ON) ||
#endif
#ifdef CONFIG_BATTERY_REVIVE_DISCONNECT
battery_get_disconnect_state() != BATTERY_NOT_DISCONNECTED ||
#endif
current_batt_params->state_of_charge <
CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON)
prevent_power_on = 1;
#if defined(CONFIG_CHARGER_MIN_POWER_MW_FOR_POWER_ON) && \
defined(CONFIG_CHARGE_MANAGER)
/* However, we can power on if a sufficient charger is present. */
if (prevent_power_on) {
if (charge_manager_get_power_limit_uw() >=
CONFIG_CHARGER_MIN_POWER_MW_FOR_POWER_ON * 1000)
prevent_power_on = 0;
#if defined(CONFIG_CHARGER_MIN_POWER_MW_FOR_POWER_ON_WITH_BATT) && \
defined(CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON_WITH_AC)
else if (charge_manager_get_power_limit_uw() >=
CONFIG_CHARGER_MIN_POWER_MW_FOR_POWER_ON_WITH_BATT * 1000
&& (current_batt_params->state_of_charge >=
CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON_WITH_AC))
prevent_power_on = 0;
#endif
}
#endif /* CONFIG_CHARGE_MANAGER && CONFIG_CHARGER_MIN_POWER_MW_FOR_POWER_ON */
/*
* Factory override: Always allow power on if WP is disabled,
* except when auto-power-on at EC startup and the battery
* is physically present.
*/
prevent_power_on &= (system_is_locked() || (automatic_power_on
#ifdef CONFIG_BATTERY_HW_PRESENT_CUSTOM
&& battery_hw_present() == BP_YES
#endif
));
#endif /* CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON */
#ifdef CONFIG_CHARGE_MANAGER
/* Always prevent power on until charge current is initialized */
if (extpower_is_present() &&
(charge_manager_get_charger_current() ==
CHARGE_CURRENT_UNINITIALIZED))
prevent_power_on = 1;
#ifdef CONFIG_BATTERY_HW_PRESENT_CUSTOM
/*
* If battery is NOT physically present then prevent power on until
* a sufficient charger is present.
*/
if (extpower_is_present() && battery_hw_present() == BP_NO
#ifdef CONFIG_CHARGER_MIN_POWER_MW_FOR_POWER_ON
&& charge_manager_get_power_limit_uw() <
CONFIG_CHARGER_MIN_POWER_MW_FOR_POWER_ON * 1000
#endif /* CONFIG_CHARGER_MIN_POWER_MW_FOR_POWER_ON */
)
prevent_power_on = 1;
#endif /* CONFIG_BATTERY_HW_PRESENT_CUSTOM */
#endif /* CONFIG_CHARGE_MANAGER */
/*
* Prevent power on if there is no battery nor ac power. This
* happens when the servo is powering the EC to flash it. Only include
* this logic for boards in initial bring up phase since this won't
* happen for released boards.
*/
#ifdef CONFIG_SYSTEM_UNLOCKED
if (!current_batt_params->is_present && !curr.ac)
prevent_power_on = 1;
#endif /* CONFIG_SYSTEM_UNLOCKED */
return prevent_power_on;
}
static int battery_near_full(void)
{
if (curr.batt.state_of_charge < BATTERY_LEVEL_NEAR_FULL)
return 0;
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
if (charge_base > -1 && charge_base < BATTERY_LEVEL_NEAR_FULL)
return 0;
#endif
return 1;
}
enum charge_state charge_get_state(void)
{
switch (curr.state) {
case ST_IDLE:
if (battery_seems_to_be_dead || battery_was_removed)
return PWR_STATE_ERROR;
return PWR_STATE_IDLE;
case ST_DISCHARGE:
#ifdef CONFIG_PWR_STATE_DISCHARGE_FULL
if (battery_near_full())
return PWR_STATE_DISCHARGE_FULL;
else
#endif
return PWR_STATE_DISCHARGE;
case ST_CHARGE:
/* The only difference here is what the LEDs display. */
if (battery_near_full())
return PWR_STATE_CHARGE_NEAR_FULL;
else
return PWR_STATE_CHARGE;
default:
/* Anything else can be considered an error for LED purposes */
return PWR_STATE_ERROR;
}
}
uint32_t charge_get_flags(void)
{
uint32_t flags = 0;
if (chg_ctl_mode != CHARGE_CONTROL_NORMAL)
flags |= CHARGE_FLAG_FORCE_IDLE;
if (curr.ac)
flags |= CHARGE_FLAG_EXTERNAL_POWER;
if (curr.batt.flags & BATT_FLAG_RESPONSIVE)
flags |= CHARGE_FLAG_BATT_RESPONSIVE;
return flags;
}
int charge_get_percent(void)
{
/*
* Since there's no way to indicate an error to the caller, we'll just
* return the last known value. Even if we've never been able to talk
* to the battery, that'll be zero, which is probably as good as
* anything.
*/
return is_full ? 100 : curr.batt.state_of_charge;
}
int charge_get_battery_temp(int idx, int *temp_ptr)
{
if (curr.batt.flags & BATT_FLAG_BAD_TEMPERATURE)
return EC_ERROR_UNKNOWN;
/* Battery temp is 10ths of degrees K, temp wants degrees K */
*temp_ptr = curr.batt.temperature / 10;
return EC_SUCCESS;
}
int charge_is_consuming_full_input_current(void)
{
int chg_pct = charge_get_percent();
return chg_pct > 2 && chg_pct < 95;
}
#ifdef CONFIG_CHARGER_OTG
int charge_set_output_current_limit(int ma, int mv)
{
int ret;
int enable = ma > 0;
if (enable) {
ret = charger_set_otg_current_voltage(ma, mv);
if (ret != EC_SUCCESS)
return ret;
}
ret = charger_enable_otg_power(enable);
if (ret != EC_SUCCESS)
return ret;
/* If we start/stop providing power, wake the charger task. */
if ((curr.output_current == 0 && enable) ||
(curr.output_current > 0 && !enable))
task_wake(TASK_ID_CHARGER);
curr.output_current = ma;
return EC_SUCCESS;
}
#endif
int charge_set_input_current_limit(int ma, int mv)
{
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
curr.input_voltage = mv;
#endif
/*
* If battery is not present, we are not locked, and base is not
* connected then allow system to pull as much input current as needed.
* Yes, we might overcurrent the charger but this is no worse than
* browning out due to insufficient input current.
*/
if (curr.batt.is_present != BP_YES && !system_is_locked() &&
!base_connected) {
#ifdef CONFIG_USB_POWER_DELIVERY
#if ((PD_MAX_POWER_MW * 1000) / PD_MAX_VOLTAGE_MV != PD_MAX_CURRENT_MA)
/*
* If battery is not present, input current is set to
* PD_MAX_CURRENT_MA. If the input power set is greater than
* the maximum allowed system power, system might get damaged.
* Hence, limit the input current to meet maximum allowed
* input system power.
*/
if (mv > 0 && mv * curr.desired_input_current >
PD_MAX_POWER_MW * 1000)
ma = (PD_MAX_POWER_MW * 1000) / mv;
else
return EC_SUCCESS;
#else
return EC_SUCCESS;
#endif
#endif /* CONFIG_USB_POWER_DELIVERY */
}
#ifdef CONFIG_CHARGER_MAX_INPUT_CURRENT
/* Limit input current limit to max limit for this board */
ma = MIN(ma, CONFIG_CHARGER_MAX_INPUT_CURRENT);
#endif
curr.desired_input_current = ma;
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
/* Wake up charger task to allocate current between lid and base. */
charge_wakeup();
return EC_SUCCESS;
#else
return charger_set_input_current(ma);
#endif
}
/*****************************************************************************/
/* 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;
rv = set_chg_ctrl_mode(p->mode);
if (rv != EC_SUCCESS)
return EC_RES_ERROR;
#ifdef CONFIG_CHARGER_DISCHARGE_ON_AC
#ifdef CONFIG_CHARGER_DISCHARGE_ON_AC_CUSTOM
rv = board_discharge_on_ac(p->mode == CHARGE_CONTROL_DISCHARGE);
#else
rv = charger_discharge_on_ac(p->mode == CHARGE_CONTROL_DISCHARGE);
#endif
if (rv != EC_SUCCESS)
return EC_RES_ERROR;
#endif
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_CHARGE_CONTROL, charge_command_charge_control,
EC_VER_MASK(1));
static void reset_current_limit(void)
{
user_current_limit = -1U;
}
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));
static int charge_command_charge_state(struct host_cmd_handler_args *args)
{
const struct ec_params_charge_state *in = args->params;
struct ec_response_charge_state *out = args->response;
uint32_t val;
int rv = EC_RES_SUCCESS;
switch (in->cmd) {
case CHARGE_STATE_CMD_GET_STATE:
out->get_state.ac = curr.ac;
out->get_state.chg_voltage = curr.chg.voltage;
out->get_state.chg_current = curr.chg.current;
out->get_state.chg_input_current = curr.chg.input_current;
out->get_state.batt_state_of_charge = curr.batt.state_of_charge;
args->response_size = sizeof(out->get_state);
break;
case CHARGE_STATE_CMD_GET_PARAM:
val = 0;
#ifdef CONFIG_CHARGER_PROFILE_OVERRIDE
/* custom profile params */
if (in->get_param.param >= CS_PARAM_CUSTOM_PROFILE_MIN &&
in->get_param.param <= CS_PARAM_CUSTOM_PROFILE_MAX) {
rv = charger_profile_override_get_param(
in->get_param.param, &val);
} else
#endif
#ifdef CONFIG_CHARGE_STATE_DEBUG
/* debug params */
if (in->get_param.param >= CS_PARAM_DEBUG_MIN &&
in->get_param.param <= CS_PARAM_DEBUG_MAX) {
rv = charge_get_charge_state_debug(
in->get_param.param, &val);
} else
#endif
/* standard params */
switch (in->get_param.param) {
case CS_PARAM_CHG_VOLTAGE:
val = curr.chg.voltage;
break;
case CS_PARAM_CHG_CURRENT:
val = curr.chg.current;
break;
case CS_PARAM_CHG_INPUT_CURRENT:
val = curr.chg.input_current;
break;
case CS_PARAM_CHG_STATUS:
val = curr.chg.status;
break;
case CS_PARAM_CHG_OPTION:
val = curr.chg.option;
break;
case CS_PARAM_LIMIT_POWER:
#ifdef CONFIG_CHARGER_LIMIT_POWER_THRESH_BAT_PCT
/*
* LIMIT_POWER status is based on battery level
* and external charger power.
*/
if ((curr.batt.is_present != BP_YES ||
curr.batt.state_of_charge <
CONFIG_CHARGER_LIMIT_POWER_THRESH_BAT_PCT)
&& charge_manager_get_power_limit_uw() <
CONFIG_CHARGER_LIMIT_POWER_THRESH_CHG_MW
* 1000 && system_is_locked())
val = 1;
else
#endif
val = 0;
break;
default:
rv = EC_RES_INVALID_PARAM;
}
/* got something */
out->get_param.value = val;
args->response_size = sizeof(out->get_param);
break;
case CHARGE_STATE_CMD_SET_PARAM:
if (system_is_locked())
return EC_RES_ACCESS_DENIED;
val = in->set_param.value;
#ifdef CONFIG_CHARGER_PROFILE_OVERRIDE
/* custom profile params */
if (in->set_param.param >= CS_PARAM_CUSTOM_PROFILE_MIN &&
in->set_param.param <= CS_PARAM_CUSTOM_PROFILE_MAX) {
rv = charger_profile_override_set_param(
in->set_param.param, val);
} else
#endif
switch (in->set_param.param) {
case CS_PARAM_CHG_VOLTAGE:
chgstate_set_manual_voltage(val);
break;
case CS_PARAM_CHG_CURRENT:
chgstate_set_manual_current(val);
break;
case CS_PARAM_CHG_INPUT_CURRENT:
if (charger_set_input_current(val))
rv = EC_RES_ERROR;
break;
case CS_PARAM_CHG_STATUS:
case CS_PARAM_LIMIT_POWER:
/* Can't set this */
rv = EC_RES_ACCESS_DENIED;
break;
case CS_PARAM_CHG_OPTION:
if (charger_set_option(val))
rv = EC_RES_ERROR;
break;
default:
rv = EC_RES_INVALID_PARAM;
}
break;
default:
CPRINTS("EC_CMD_CHARGE_STATE: bad cmd 0x%x", in->cmd);
rv = EC_RES_INVALID_PARAM;
}
return rv;
}
DECLARE_HOST_COMMAND(EC_CMD_CHARGE_STATE, charge_command_charge_state,
EC_VER_MASK(0));
/*****************************************************************************/
/* Console commands */
#ifdef CONFIG_CMD_PWR_AVG
static int command_pwr_avg(int argc, char **argv)
{
int avg_mv;
int avg_ma;
int avg_mw;
if (argc != 1)
return EC_ERROR_PARAM_COUNT;
avg_mv = battery_get_avg_voltage();
if (avg_mv < 0)
return EC_ERROR_UNKNOWN;
avg_ma = battery_get_avg_current();
avg_mw = avg_mv * avg_ma / 1000;
ccprintf("mv = %d\nma = %d\nmw = %d\n",
avg_mv, avg_ma, avg_mw);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(pwr_avg, command_pwr_avg,
NULL,
"Get 1 min power average");
#endif /* CONFIG_CMD_PWR_AVG */
static int command_chgstate(int argc, char **argv)
{
int rv;
int val;
if (argc > 1) {
if (!strcasecmp(argv[1], "idle")) {
if (argc <= 2)
return EC_ERROR_PARAM_COUNT;
if (!parse_bool(argv[2], &val))
return EC_ERROR_PARAM2;
rv = set_chg_ctrl_mode(val ? CHARGE_CONTROL_IDLE :
CHARGE_CONTROL_NORMAL);
if (rv)
return rv;
#ifdef CONFIG_CHARGER_DISCHARGE_ON_AC
} else if (!strcasecmp(argv[1], "discharge")) {
if (argc <= 2)
return EC_ERROR_PARAM_COUNT;
if (!parse_bool(argv[2], &val))
return EC_ERROR_PARAM2;
rv = set_chg_ctrl_mode(val ? CHARGE_CONTROL_DISCHARGE :
CHARGE_CONTROL_NORMAL);
if (rv)
return rv;
#ifdef CONFIG_CHARGER_DISCHARGE_ON_AC_CUSTOM
rv = board_discharge_on_ac(val);
#else
rv = charger_discharge_on_ac(val);
#endif /* CONFIG_CHARGER_DISCHARGE_ON_AC_CUSTOM */
if (rv)
return rv;
#endif /* CONFIG_CHARGER_DISCHARGE_ON_AC */
} else if (!strcasecmp(argv[1], "debug")) {
if (argc <= 2)
return EC_ERROR_PARAM_COUNT;
if (!parse_bool(argv[2], &debugging))
return EC_ERROR_PARAM2;
} else {
return EC_ERROR_PARAM1;
}
}
dump_charge_state();
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(chgstate, command_chgstate,
"[idle|discharge|debug on|off]",
"Get/set charge state machine status");
#ifdef CONFIG_EC_EC_COMM_BATTERY_MASTER
static int command_chgdualdebug(int argc, char **argv)
{
int val;
char *e;
if (argc > 1) {
if (argv[1][0] == 'c') {
if (argc <= 2)
return EC_ERROR_PARAM_COUNT;
if (!strcasecmp(argv[2], "auto")) {
val = -1;
} else {
val = strtoi(argv[2], &e, 0);
if (*e || val < 0)
return EC_ERROR_PARAM2;
}
manual_ac_current_base = val;
charge_wakeup();
} else if (argv[1][0] == 'd') {
if (argc <= 2)
return EC_ERROR_PARAM_COUNT;
if (!strcasecmp(argv[2], "auto")) {
manual_noac_enabled = 0;
} else {
val = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
manual_noac_current_base = val;
manual_noac_enabled = 1;
}
charge_wakeup();
} else {
return EC_ERROR_PARAM1;
}
} else {
ccprintf("Base/Lid: %d%s/%d mA\n",
prev_current_base, prev_allow_charge_base ? "+" : "",
prev_current_lid);
}
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(chgdualdebug, command_chgdualdebug,
"[charge (auto|<current>)|discharge (auto|<current>)]",
"Manually control dual-battery charging algorithm.");
#endif
#ifdef CONFIG_CHARGE_STATE_DEBUG
int charge_get_charge_state_debug(int param, uint32_t *value)
{
switch (param) {
case CS_PARAM_DEBUG_CTL_MODE:
*value = chg_ctl_mode;
break;
case CS_PARAM_DEBUG_MANUAL_CURRENT:
*value = manual_current;
break;
case CS_PARAM_DEBUG_MANUAL_VOLTAGE:
*value = manual_voltage;
break;
case CS_PARAM_DEBUG_SEEMS_DEAD:
*value = battery_seems_to_be_dead;
break;
case CS_PARAM_DEBUG_SEEMS_DISCONNECTED:
*value = battery_seems_to_be_disconnected;
break;
case CS_PARAM_DEBUG_BATT_REMOVED:
*value = battery_was_removed;
break;
default:
*value = 0;
return EC_ERROR_INVAL;
}
return EC_SUCCESS;
}
#endif