| /* |
| * Copyright (c) 2022 Leica Geosystems AG |
| * |
| * Copyright 2022 Google LLC |
| * Copyright 2023 Microsoft Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT sbs_sbs_gauge_new_api |
| |
| #include "sbs_gauge.h" |
| |
| #include <zephyr/drivers/fuel_gauge.h> |
| #include <zephyr/drivers/i2c.h> |
| #include <zephyr/logging/log.h> |
| #include <zephyr/sys/byteorder.h> |
| |
| LOG_MODULE_REGISTER(sbs_gauge); |
| |
| static int sbs_cmd_reg_read(const struct device *dev, uint8_t reg_addr, uint16_t *val) |
| { |
| const struct sbs_gauge_config *cfg; |
| uint8_t i2c_data[2]; |
| int status; |
| |
| cfg = dev->config; |
| status = i2c_burst_read_dt(&cfg->i2c, reg_addr, i2c_data, ARRAY_SIZE(i2c_data)); |
| if (status < 0) { |
| LOG_ERR("Unable to read register"); |
| return status; |
| } |
| |
| *val = sys_get_le16(i2c_data); |
| |
| return 0; |
| } |
| |
| static int sbs_cmd_reg_write(const struct device *dev, uint8_t reg_addr, uint16_t val) |
| { |
| const struct sbs_gauge_config *config = dev->config; |
| uint8_t buf[2]; |
| |
| sys_put_le16(val, buf); |
| |
| return i2c_burst_write_dt(&config->i2c, reg_addr, buf, sizeof(buf)); |
| } |
| |
| static int sbs_cmd_buffer_read(const struct device *dev, uint8_t reg_addr, char *buffer, |
| const uint8_t buffer_size) |
| { |
| const struct sbs_gauge_config *cfg; |
| int status; |
| |
| cfg = dev->config; |
| status = i2c_burst_read_dt(&cfg->i2c, reg_addr, buffer, buffer_size); |
| if (status < 0) { |
| LOG_ERR("Unable to read register"); |
| return status; |
| } |
| |
| return 0; |
| } |
| |
| static int sbs_gauge_get_prop(const struct device *dev, struct fuel_gauge_get_property *prop) |
| { |
| int rc = 0; |
| uint16_t val = 0; |
| |
| switch (prop->property_type) { |
| case FUEL_GAUGE_AVG_CURRENT: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_AVG_CURRENT, &val); |
| prop->value.avg_current = val * 1000; |
| break; |
| case FUEL_GAUGE_CYCLE_COUNT: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_CYCLE_COUNT, &val); |
| prop->value.cycle_count = val; |
| break; |
| case FUEL_GAUGE_CURRENT: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_CURRENT, &val); |
| prop->value.current = val * 1000; |
| break; |
| case FUEL_GAUGE_FULL_CHARGE_CAPACITY: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_FULL_CAPACITY, &val); |
| prop->value.full_charge_capacity = val * 1000; |
| break; |
| case FUEL_GAUGE_REMAINING_CAPACITY: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_REM_CAPACITY, &val); |
| prop->value.remaining_capacity = val * 1000; |
| break; |
| case FUEL_GAUGE_RUNTIME_TO_EMPTY: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_RUNTIME2EMPTY, &val); |
| prop->value.runtime_to_empty = val; |
| break; |
| case FUEL_GAUGE_RUNTIME_TO_FULL: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_AVG_TIME2FULL, &val); |
| prop->value.runtime_to_full = val; |
| break; |
| case FUEL_GAUGE_SBS_MFR_ACCESS: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_MANUFACTURER_ACCESS, &val); |
| prop->value.sbs_mfr_access_word = val; |
| break; |
| case FUEL_GAUGE_ABSOLUTE_STATE_OF_CHARGE: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_ASOC, &val); |
| prop->value.absolute_state_of_charge = val; |
| break; |
| case FUEL_GAUGE_RELATIVE_STATE_OF_CHARGE: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_RSOC, &val); |
| prop->value.relative_state_of_charge = val; |
| break; |
| case FUEL_GAUGE_TEMPERATURE: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_TEMP, &val); |
| prop->value.temperature = val; |
| break; |
| case FUEL_GAUGE_VOLTAGE: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_VOLTAGE, &val); |
| prop->value.voltage = val * 1000; |
| break; |
| case FUEL_GAUGE_SBS_MODE: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_BATTERY_MODE, &val); |
| prop->value.sbs_mode = val; |
| break; |
| case FUEL_GAUGE_CHARGE_CURRENT: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_CHG_CURRENT, &val); |
| prop->value.chg_current = val; |
| break; |
| case FUEL_GAUGE_CHARGE_VOLTAGE: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_CHG_VOLTAGE, &val); |
| prop->value.chg_voltage = val; |
| break; |
| case FUEL_GAUGE_STATUS: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_FLAGS, &val); |
| prop->value.fg_status = val; |
| break; |
| case FUEL_GAUGE_DESIGN_CAPACITY: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_NOM_CAPACITY, &val); |
| prop->value.design_cap = val; |
| break; |
| case FUEL_GAUGE_DESIGN_VOLTAGE: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_DESIGN_VOLTAGE, &val); |
| prop->value.design_volt = val; |
| break; |
| case FUEL_GAUGE_SBS_ATRATE: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_AR, &val); |
| prop->value.sbs_at_rate = val; |
| break; |
| case FUEL_GAUGE_SBS_ATRATE_TIME_TO_FULL: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_ARTTF, &val); |
| prop->value.sbs_at_rate_time_to_full = val; |
| break; |
| case FUEL_GAUGE_SBS_ATRATE_TIME_TO_EMPTY: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_ARTTE, &val); |
| prop->value.sbs_at_rate_time_to_empty = val; |
| break; |
| case FUEL_GAUGE_SBS_ATRATE_OK: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_AROK, &val); |
| prop->value.sbs_at_rate_ok = val; |
| break; |
| case FUEL_GAUGE_SBS_REMAINING_CAPACITY_ALARM: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_REM_CAPACITY_ALARM, &val); |
| prop->value.sbs_remaining_capacity_alarm = val; |
| break; |
| case FUEL_GAUGE_SBS_REMAINING_TIME_ALARM: |
| rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_REM_TIME_ALARM, &val); |
| prop->value.sbs_remaining_time_alarm = val; |
| break; |
| default: |
| rc = -ENOTSUP; |
| } |
| |
| prop->status = rc; |
| |
| return rc; |
| } |
| |
| static int sbs_gauge_set_prop(const struct device *dev, struct fuel_gauge_set_property *prop) |
| { |
| int rc = 0; |
| uint16_t val = 0; |
| |
| switch (prop->property_type) { |
| |
| case FUEL_GAUGE_SBS_MFR_ACCESS: |
| rc = sbs_cmd_reg_write(dev, SBS_GAUGE_CMD_MANUFACTURER_ACCESS, |
| prop->value.sbs_mfr_access_word); |
| prop->value.sbs_mfr_access_word = val; |
| break; |
| case FUEL_GAUGE_SBS_REMAINING_CAPACITY_ALARM: |
| rc = sbs_cmd_reg_write(dev, SBS_GAUGE_CMD_REM_CAPACITY_ALARM, |
| prop->value.sbs_remaining_capacity_alarm); |
| prop->value.sbs_remaining_capacity_alarm = val; |
| break; |
| case FUEL_GAUGE_SBS_REMAINING_TIME_ALARM: |
| rc = sbs_cmd_reg_write(dev, SBS_GAUGE_CMD_REM_TIME_ALARM, |
| prop->value.sbs_remaining_time_alarm); |
| prop->value.sbs_remaining_time_alarm = val; |
| break; |
| case FUEL_GAUGE_SBS_MODE: |
| rc = sbs_cmd_reg_write(dev, SBS_GAUGE_CMD_BATTERY_MODE, prop->value.sbs_mode); |
| prop->value.sbs_mode = val; |
| break; |
| case FUEL_GAUGE_SBS_ATRATE: |
| rc = sbs_cmd_reg_write(dev, SBS_GAUGE_CMD_AR, prop->value.sbs_at_rate); |
| prop->value.sbs_at_rate = val; |
| break; |
| |
| default: |
| rc = -ENOTSUP; |
| } |
| |
| prop->status = rc; |
| |
| return rc; |
| } |
| |
| static int sbs_gauge_get_buffer_prop(const struct device *dev, |
| struct fuel_gauge_get_buffer_property *prop, void *dst, |
| size_t dst_len) |
| { |
| int rc = 0; |
| |
| switch (prop->property_type) { |
| case FUEL_GAUGE_MANUFACTURER_NAME: |
| if (dst_len == sizeof(struct sbs_gauge_manufacturer_name)) { |
| rc = sbs_cmd_buffer_read(dev, SBS_GAUGE_CMD_MANUFACTURER_NAME, (char *)dst, |
| dst_len); |
| } else { |
| rc = -EINVAL; |
| } |
| break; |
| case FUEL_GAUGE_DEVICE_NAME: |
| if (dst_len == sizeof(struct sbs_gauge_device_name)) { |
| rc = sbs_cmd_buffer_read(dev, SBS_GAUGE_CMD_DEVICE_NAME, (char *)dst, |
| dst_len); |
| } else { |
| rc = -EINVAL; |
| } |
| break; |
| case FUEL_GAUGE_DEVICE_CHEMISTRY: |
| if (dst_len == sizeof(struct sbs_gauge_device_chemistry)) { |
| rc = sbs_cmd_buffer_read(dev, SBS_GAUGE_CMD_DEVICE_CHEMISTRY, (char *)dst, |
| dst_len); |
| } else { |
| rc = -EINVAL; |
| } |
| break; |
| default: |
| rc = -ENOTSUP; |
| } |
| |
| prop->status = rc; |
| return rc; |
| } |
| |
| static int sbs_gauge_get_props(const struct device *dev, struct fuel_gauge_get_property *props, |
| size_t len) |
| { |
| int err_count = 0; |
| |
| for (int i = 0; i < len; i++) { |
| int ret = sbs_gauge_get_prop(dev, props + i); |
| |
| err_count += ret ? 1 : 0; |
| } |
| |
| err_count = (err_count == len) ? -1 : err_count; |
| |
| return err_count; |
| } |
| |
| static int sbs_gauge_set_props(const struct device *dev, struct fuel_gauge_set_property *props, |
| size_t len) |
| { |
| int err_count = 0; |
| |
| for (int i = 0; i < len; i++) { |
| int ret = sbs_gauge_set_prop(dev, props + i); |
| |
| err_count += ret ? 1 : 0; |
| } |
| |
| err_count = (err_count == len) ? -1 : err_count; |
| |
| return err_count; |
| } |
| |
| /** |
| * @brief initialize the fuel gauge |
| * |
| * @return 0 for success |
| */ |
| static int sbs_gauge_init(const struct device *dev) |
| { |
| const struct sbs_gauge_config *cfg; |
| |
| cfg = dev->config; |
| |
| if (!device_is_ready(cfg->i2c.bus)) { |
| LOG_ERR("Bus device is not ready"); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| static const struct fuel_gauge_driver_api sbs_gauge_driver_api = { |
| .get_property = &sbs_gauge_get_props, |
| .set_property = &sbs_gauge_set_props, |
| .get_buffer_property = &sbs_gauge_get_buffer_prop, |
| }; |
| |
| /* FIXME: fix init priority */ |
| #define SBS_GAUGE_INIT(index) \ |
| \ |
| static const struct sbs_gauge_config sbs_gauge_config_##index = { \ |
| .i2c = I2C_DT_SPEC_INST_GET(index), \ |
| }; \ |
| \ |
| DEVICE_DT_INST_DEFINE(index, &sbs_gauge_init, NULL, NULL, &sbs_gauge_config_##index, \ |
| POST_KERNEL, CONFIG_FUEL_GAUGE_INIT_PRIORITY, \ |
| &sbs_gauge_driver_api); |
| |
| DT_INST_FOREACH_STATUS_OKAY(SBS_GAUGE_INIT) |