302 lines
7.7 KiB
C
302 lines
7.7 KiB
C
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/* Copyright 2016 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Battery pack vendor provided charging profile
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*/
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#include "battery.h"
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#include "battery_smart.h"
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#include "charge_state.h"
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#include "chipset.h"
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#include "console.h"
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#include "driver/battery/max17055.h"
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#include "driver/charger/rt946x.h"
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#include "ec_commands.h"
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#include "extpower.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "system.h"
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#include "util.h"
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/*
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* AE-Tech battery pack has two charging phases when operating
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* between 10 and 20C
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*/
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#define CHARGE_PHASE_CHANGE_TRIP_VOLTAGE_MV 4200
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#define CHARGE_PHASE_CHANGE_HYSTERESIS_MV 50
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#define CHARGE_PHASE_CHANGED_CURRENT_MA 1800
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#define TEMP_OUT_OF_RANGE TEMP_ZONE_COUNT
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static uint8_t batt_id = 0xff;
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/* Do not change the enum values. We directly use strap gpio level to index. */
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enum battery_type {
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BATTERY_SIMPLO = 0,
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BATTERY_AETECH,
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BATTERY_COUNT
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};
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static const struct battery_info info[] = {
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[BATTERY_SIMPLO] = {
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.voltage_max = 4400,
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.voltage_normal = 3840,
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.voltage_min = 3000,
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.precharge_current = 256,
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.start_charging_min_c = 0,
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.start_charging_max_c = 45,
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.charging_min_c = 0,
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.charging_max_c = 60,
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.discharging_min_c = -20,
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.discharging_max_c = 60,
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},
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[BATTERY_AETECH] = {
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.voltage_max = 4350,
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.voltage_normal = 3800,
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.voltage_min = 3000,
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.precharge_current = 700,
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.start_charging_min_c = 0,
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.start_charging_max_c = 45,
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.charging_min_c = 0,
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.charging_max_c = 45,
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.discharging_min_c = -20,
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.discharging_max_c = 55,
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}
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};
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static const struct max17055_batt_profile batt_profile[] = {
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[BATTERY_SIMPLO] = {
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.is_ez_config = 0,
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.design_cap = 0x221e, /* 8734mAh */
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.ichg_term = 0x589, /* 443 mA */
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/* Empty voltage = 3000mV, Recovery voltage = 3600mV */
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.v_empty_detect = 0x965a,
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.learn_cfg = 0x4406,
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.dpacc = 0x0c7a,
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.rcomp0 = 0x0062,
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.tempco = 0x1327,
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.qr_table00 = 0x1680,
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.qr_table10 = 0x0900,
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.qr_table20 = 0x0280,
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.qr_table30 = 0x0280,
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},
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[BATTERY_AETECH] = {
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.is_ez_config = 0,
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.design_cap = 0x232f, /* 9007mAh */
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.ichg_term = 0x0240, /* 180mA */
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/* Empty voltage = 2700mV, Recovery voltage = 3280mV */
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.v_empty_detect = 0x8752,
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.learn_cfg = 0x4476,
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.dpacc = 0x0c7b,
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.rcomp0 = 0x0077,
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.tempco = 0x1d3f,
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.qr_table00 = 0x1200,
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.qr_table10 = 0x0900,
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.qr_table20 = 0x0480,
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.qr_table30 = 0x0480,
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},
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};
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const struct battery_info *battery_get_info(void)
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{
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if (batt_id >= BATTERY_COUNT)
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batt_id = gpio_get_level(GPIO_BATT_ID);
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return &info[batt_id];
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}
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const struct max17055_batt_profile *max17055_get_batt_profile(void)
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{
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if (batt_id >= BATTERY_COUNT)
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batt_id = gpio_get_level(GPIO_BATT_ID);
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return &batt_profile[batt_id];
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}
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int board_cut_off_battery(void)
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{
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return rt946x_cutoff_battery();
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}
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enum battery_disconnect_state battery_get_disconnect_state(void)
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{
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if (battery_is_present() == BP_YES)
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return BATTERY_NOT_DISCONNECTED;
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return BATTERY_DISCONNECTED;
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}
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int charger_profile_override(struct charge_state_data *curr)
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{
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/* battery temp in 0.1 deg C */
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int bat_temp_c = curr->batt.temperature - 2731;
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/*
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* Keep track of battery temperature range:
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*
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* ZONE_0 ZONE_1 ZONE_2
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* -----+--------+--------+------------+----- Temperature (C)
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* t0 t1 t2 t3
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*/
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enum {
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TEMP_ZONE_0, /* t0 < bat_temp_c <= t1 */
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TEMP_ZONE_1, /* t1 < bat_temp_c <= t2 */
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TEMP_ZONE_2, /* t2 < bat_temp_c <= t3 */
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TEMP_ZONE_COUNT
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} temp_zone;
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static struct {
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int temp_min; /* 0.1 deg C */
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int temp_max; /* 0.1 deg C */
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int desired_current; /* mA */
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int desired_voltage; /* mV */
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} temp_zones[BATTERY_COUNT][TEMP_ZONE_COUNT] = {
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[BATTERY_SIMPLO] = {
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{0, 150, 1772, 4376}, /* TEMP_ZONE_0 */
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{150, 450, 4000, 4376}, /* TEMP_ZONE_1 */
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{450, 600, 4000, 4100}, /* TEMP_ZONE_2 */
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},
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[BATTERY_AETECH] = {
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{0, 100, 900, 4200}, /* TEMP_ZONE_0 */
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{100, 200, 2700, 4350}, /* TEMP_ZONE_1 */
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/*
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* TODO(b:70287349): Limit the charging current to
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* 2A unless AE-Tech fix their battery pack.
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*/
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{200, 450, 2000, 4350}, /* TEMP_ZONE_2 */
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}
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};
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BUILD_ASSERT(ARRAY_SIZE(temp_zones[0]) == TEMP_ZONE_COUNT);
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BUILD_ASSERT(ARRAY_SIZE(temp_zones) == BATTERY_COUNT);
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static int charge_phase = 1;
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static uint8_t quirk_batt_update;
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/*
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* This is a quirk for old Simplo battery to clamp
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* charging current to 3A.
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*/
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if ((board_get_version() <= 4) && !quirk_batt_update) {
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temp_zones[BATTERY_SIMPLO][TEMP_ZONE_1].desired_current = 3000;
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temp_zones[BATTERY_SIMPLO][TEMP_ZONE_2].desired_current = 3000;
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quirk_batt_update = 1;
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}
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if (batt_id >= BATTERY_COUNT)
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batt_id = gpio_get_level(GPIO_BATT_ID);
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if ((curr->batt.flags & BATT_FLAG_BAD_TEMPERATURE) ||
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(bat_temp_c < temp_zones[batt_id][0].temp_min) ||
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(bat_temp_c >= temp_zones[batt_id][TEMP_ZONE_COUNT - 1].temp_max))
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temp_zone = TEMP_OUT_OF_RANGE;
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else {
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for (temp_zone = 0; temp_zone < TEMP_ZONE_COUNT; temp_zone++) {
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if (bat_temp_c <
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temp_zones[batt_id][temp_zone].temp_max)
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break;
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}
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}
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if (curr->state != ST_CHARGE) {
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charge_phase = 1;
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return 0;
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}
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switch (temp_zone) {
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case TEMP_ZONE_0:
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case TEMP_ZONE_2:
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curr->requested_current =
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temp_zones[batt_id][temp_zone].desired_current;
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curr->requested_voltage =
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temp_zones[batt_id][temp_zone].desired_voltage;
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break;
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case TEMP_ZONE_1:
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/* No phase change for Simplo battery pack */
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if (batt_id == BATTERY_SIMPLO)
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charge_phase = 0;
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/*
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* If AE-Tech battery pack is used and the voltage reading
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* is bad, let's be conservative and assume change_phase == 1.
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*/
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else if (curr->batt.flags & BATT_FLAG_BAD_VOLTAGE)
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charge_phase = 1;
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else {
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if (curr->batt.voltage <
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(CHARGE_PHASE_CHANGE_TRIP_VOLTAGE_MV -
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CHARGE_PHASE_CHANGE_HYSTERESIS_MV))
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charge_phase = 0;
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else if (curr->batt.voltage >
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CHARGE_PHASE_CHANGE_TRIP_VOLTAGE_MV)
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charge_phase = 1;
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}
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curr->requested_voltage =
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temp_zones[batt_id][temp_zone].desired_voltage;
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curr->requested_current = (charge_phase) ?
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CHARGE_PHASE_CHANGED_CURRENT_MA :
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temp_zones[batt_id][temp_zone].desired_current;
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break;
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case TEMP_OUT_OF_RANGE:
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curr->requested_current = curr->requested_voltage = 0;
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curr->batt.flags &= ~BATT_FLAG_WANT_CHARGE;
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curr->state = ST_IDLE;
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break;
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}
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/*
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* When the charger says it's done charging, even if fuel gauge says
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* SOC < BATTERY_LEVEL_NEAR_FULL, we'll overwrite SOC with
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* BATTERY_LEVEL_NEAR_FULL. So we can ensure both Chrome OS UI
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* and battery LED indicate full charge.
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*/
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if (rt946x_is_charge_done()) {
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curr->batt.state_of_charge = MAX(BATTERY_LEVEL_NEAR_FULL,
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curr->batt.state_of_charge);
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/*
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* This is a workaround for b:78792296. When AP is off and
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* charge termination is detected, we disable idle mode.
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*/
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if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
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disable_idle();
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else
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enable_idle();
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}
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return 0;
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}
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static void board_enable_idle(void)
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{
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enable_idle();
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}
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DECLARE_HOOK(HOOK_AC_CHANGE, board_enable_idle, HOOK_PRIO_DEFAULT);
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static void board_charge_termination(void)
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{
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static uint8_t te;
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/* Enable charge termination when we are sure battery is present. */
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if (!te && battery_is_present() == BP_YES) {
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if (!rt946x_enable_charge_termination(1))
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te = 1;
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}
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}
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DECLARE_HOOK(HOOK_BATTERY_SOC_CHANGE,
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board_charge_termination,
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HOOK_PRIO_DEFAULT);
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/* Customs options controllable by host command. */
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#define PARAM_FASTCHARGE (CS_PARAM_CUSTOM_PROFILE_MIN + 0)
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enum ec_status charger_profile_override_get_param(uint32_t param,
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uint32_t *value)
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{
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return EC_RES_INVALID_PARAM;
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}
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enum ec_status charger_profile_override_set_param(uint32_t param,
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uint32_t value)
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{
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return EC_RES_INVALID_PARAM;
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}
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