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/* Copyright 2019 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.
*/
#include "battery.h"
#include "battery_fuel_gauge.h"
#include "charge_state.h"
#include "charger_mt6370.h"
#include "console.h"
#include "driver/charger/rt946x.h"
#include "gpio.h"
#include "power.h"
#include "timer.h"
#include "usb_pd.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
const struct board_batt_params board_battery_info[] = {
[BATTERY_SIMPLO] = {
.fuel_gauge = {
.manuf_name = "SMP",
.device_name = "L19M3PG0",
.ship_mode = {
.reg_addr = 0x34,
.reg_data = { 0x0000, 0x1000 },
},
.fet = {
.reg_addr = 0x34,
.reg_mask = 0x0100,
.disconnect_val = 0x0100,
}
},
.batt_info = {
.voltage_max = 4400,
.voltage_normal = 3840,
.voltage_min = 3000,
.precharge_current = 256,
.start_charging_min_c = 0,
.start_charging_max_c = 45,
.charging_min_c = 0,
.charging_max_c = 60,
.discharging_min_c = -20,
.discharging_max_c = 60,
},
},
[BATTERY_CELXPERT] = {
.fuel_gauge = {
.manuf_name = "Celxpert",
.device_name = "L19C3PG0",
.ship_mode = {
.reg_addr = 0x34,
.reg_data = { 0x0000, 0x1000 },
},
.fet = {
.reg_addr = 0x34,
.reg_mask = 0x0100,
.disconnect_val = 0x0100,
}
},
.batt_info = {
.voltage_max = 4400,
.voltage_normal = 3840,
.voltage_min = 2800,
.precharge_current = 404,
.start_charging_min_c = 0,
.start_charging_max_c = 45,
.charging_min_c = 0,
.charging_max_c = 60,
.discharging_min_c = -20,
.discharging_max_c = 60,
},
},
};
BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_SIMPLO;
enum battery_present battery_hw_present(void)
{
return gpio_get_level(GPIO_EC_BATT_PRES_ODL) ? BP_NO : BP_YES;
}
static void fix_single_param(int flag, int *cached, int *curr)
{
if (flag)
*curr = *cached;
else
*cached = *curr;
}
#define CACHE_INVALIDATION_TIME_US (5 * SECOND)
/*
* b:144195782: bitbang fails randomly, and there's no way to
* notify kernel side that bitbang read failed.
* Thus, if any value in batt_params is bad, replace it with a cached
* good value, to make sure we never send random numbers to kernel
* side.
*/
__override void board_battery_compensate_params(struct batt_params *batt)
{
static struct batt_params batt_cache = { 0 };
static timestamp_t deadline;
/*
* If battery keeps failing for 5 seconds, stop hiding the error and
* report back to host.
*/
if (batt->flags & BATT_FLAG_BAD_ANY) {
if (timestamp_expired(deadline, NULL))
return;
} else {
deadline.val = get_time().val + CACHE_INVALIDATION_TIME_US;
}
/* return cached values for at most CACHE_INVALIDATION_TIME_US */
fix_single_param(batt->flags & BATT_FLAG_BAD_STATE_OF_CHARGE,
&batt_cache.state_of_charge,
&batt->state_of_charge);
fix_single_param(batt->flags & BATT_FLAG_BAD_VOLTAGE,
&batt_cache.voltage,
&batt->voltage);
fix_single_param(batt->flags & BATT_FLAG_BAD_CURRENT,
&batt_cache.current,
&batt->current);
fix_single_param(batt->flags & BATT_FLAG_BAD_DESIRED_VOLTAGE,
&batt_cache.desired_voltage,
&batt->desired_voltage);
fix_single_param(batt->flags & BATT_FLAG_BAD_DESIRED_CURRENT,
&batt_cache.desired_current,
&batt->desired_current);
fix_single_param(batt->flags & BATT_FLAG_BAD_REMAINING_CAPACITY,
&batt_cache.remaining_capacity,
&batt->remaining_capacity);
fix_single_param(batt->flags & BATT_FLAG_BAD_FULL_CAPACITY,
&batt_cache.full_capacity,
&batt->full_capacity);
fix_single_param(batt->flags & BATT_FLAG_BAD_STATUS,
&batt_cache.status,
&batt->status);
fix_single_param(batt->flags & BATT_FLAG_BAD_TEMPERATURE,
&batt_cache.temperature,
&batt->temperature);
/*
* If battery_compensate_params() didn't calculate display_charge
* for us, also update it with last good value.
*/
fix_single_param(batt->display_charge == 0,
&batt_cache.display_charge,
&batt->display_charge);
/* remove bad flags after applying cached values */
batt->flags &= ~BATT_FLAG_BAD_ANY;
}
int charger_profile_override(struct charge_state_data *curr)
{
const struct battery_info *batt_info = battery_get_info();
static int normal_charge_lock, over_discharge_lock;
/* battery temp in 0.1 deg C */
int bat_temp_c = curr->batt.temperature - 2731;
/*
* SMP battery uses HW pre-charge circuit and pre-charge current is
* limited to ~50mA. Once the charge current is lower than IEOC level
* within CHG_TEDG_EOC, and TE is enabled, the charging power path will
* be turned off. Disable EOC and TE when battery stays over discharge
* state, otherwise enable EOC and TE.
*/
if (!(curr->batt.flags & BATT_FLAG_BAD_VOLTAGE)) {
if (curr->batt.voltage < batt_info->voltage_min) {
normal_charge_lock = 0;
if (!over_discharge_lock && curr->state == ST_CHARGE) {
over_discharge_lock = 1;
rt946x_enable_charge_eoc(0);
rt946x_enable_charge_termination(0);
}
} else {
over_discharge_lock = 0;
if (!normal_charge_lock) {
normal_charge_lock = 1;
rt946x_enable_charge_eoc(1);
rt946x_enable_charge_termination(1);
}
}
}
#ifdef VARIANT_KUKUI_CHARGER_MT6370
mt6370_charger_profile_override(curr);
#endif /* CONFIG_CHARGER_MT6370 */
/*
* When smart battery temperature is more than 45 deg C, the max
* charging voltage is 4100mV.
*/
if (curr->state == ST_CHARGE && bat_temp_c >= 450
&& !(curr->batt.flags & BATT_FLAG_BAD_TEMPERATURE))
curr->requested_voltage = 4100;
else
curr->requested_voltage = batt_info->voltage_max;
/*
* mt6370's minimum regulated current is 500mA REG17[7:2] 0b100,
* values below 0b100 are preserved. In the other hand, it makes sure
* mt6370's VOREG set as 4400mV and minimum value of mt6370's ICHG
* is limited as 500mA.
*/
curr->requested_current = MAX(500, curr->requested_current);
return 0;
}
enum ec_status charger_profile_override_get_param(uint32_t param,
uint32_t *value)
{
return EC_RES_INVALID_PARAM;
}
enum ec_status charger_profile_override_set_param(uint32_t param,
uint32_t value)
{
return EC_RES_INVALID_PARAM;
}
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