| /* ST Microelectronics IIS2DLPC 3-axis accelerometer driver |
| * |
| * Copyright (c) 2020 STMicroelectronics |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Datasheet: |
| * https://www.st.com/resource/en/datasheet/iis2dlpc.pdf |
| */ |
| |
| #define DT_DRV_COMPAT st_iis2dlpc |
| |
| #include <init.h> |
| #include <sys/__assert.h> |
| #include <sys/byteorder.h> |
| #include <logging/log.h> |
| #include <drivers/sensor.h> |
| |
| #if DT_ANY_INST_ON_BUS_STATUS_OKAY(spi) |
| #include <drivers/spi.h> |
| #elif DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c) |
| #include <drivers/i2c.h> |
| #endif |
| |
| #include "iis2dlpc.h" |
| |
| LOG_MODULE_REGISTER(IIS2DLPC, CONFIG_SENSOR_LOG_LEVEL); |
| |
| /** |
| * iis2dlpc_set_range - set full scale range for acc |
| * @dev: Pointer to instance of struct device (I2C or SPI) |
| * @range: Full scale range (2, 4, 8 and 16 G) |
| */ |
| static int iis2dlpc_set_range(struct device *dev, u16_t range) |
| { |
| int err; |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| const struct iis2dlpc_device_config *cfg = dev->config_info; |
| u8_t shift_gain = 0U; |
| u8_t fs = IIS2DLPC_FS_TO_REG(range); |
| |
| err = iis2dlpc_full_scale_set(iis2dlpc->ctx, fs); |
| |
| if (cfg->pm == IIS2DLPC_CONT_LOW_PWR_12bit) { |
| shift_gain = IIS2DLPC_SHFT_GAIN_NOLP1; |
| } |
| |
| if (!err) { |
| /* save internally gain for optimization */ |
| iis2dlpc->gain = |
| IIS2DLPC_FS_TO_GAIN(IIS2DLPC_FS_TO_REG(range), |
| shift_gain); |
| } |
| |
| return err; |
| } |
| |
| /** |
| * iis2dlpc_set_odr - set new sampling frequency |
| * @dev: Pointer to instance of struct device (I2C or SPI) |
| * @odr: Output data rate |
| */ |
| static int iis2dlpc_set_odr(struct device *dev, u16_t odr) |
| { |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| u8_t val; |
| |
| /* check if power off */ |
| if (odr == 0U) { |
| return iis2dlpc_data_rate_set(iis2dlpc->ctx, |
| IIS2DLPC_XL_ODR_OFF); |
| } |
| |
| val = IIS2DLPC_ODR_TO_REG(odr); |
| if (val > IIS2DLPC_XL_ODR_1k6Hz) { |
| LOG_ERR("ODR too high"); |
| return -ENOTSUP; |
| } |
| |
| return iis2dlpc_data_rate_set(iis2dlpc->ctx, val); |
| } |
| |
| static inline void iis2dlpc_convert(struct sensor_value *val, int raw_val, |
| float gain) |
| { |
| s64_t dval; |
| |
| /* Gain is in ug/LSB */ |
| /* Convert to m/s^2 */ |
| dval = ((s64_t)raw_val * gain * SENSOR_G) / 1000000LL; |
| val->val1 = dval / 1000000LL; |
| val->val2 = dval % 1000000LL; |
| } |
| |
| static inline void iis2dlpc_channel_get_acc(struct device *dev, |
| enum sensor_channel chan, |
| struct sensor_value *val) |
| { |
| int i; |
| u8_t ofs_start, ofs_stop; |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| struct sensor_value *pval = val; |
| |
| switch (chan) { |
| case SENSOR_CHAN_ACCEL_X: |
| ofs_start = ofs_stop = 0U; |
| break; |
| case SENSOR_CHAN_ACCEL_Y: |
| ofs_start = ofs_stop = 1U; |
| break; |
| case SENSOR_CHAN_ACCEL_Z: |
| ofs_start = ofs_stop = 2U; |
| break; |
| default: |
| ofs_start = 0U; ofs_stop = 2U; |
| break; |
| } |
| |
| for (i = ofs_start; i <= ofs_stop ; i++) { |
| iis2dlpc_convert(pval++, iis2dlpc->acc[i], iis2dlpc->gain); |
| } |
| } |
| |
| static int iis2dlpc_channel_get(struct device *dev, |
| enum sensor_channel chan, |
| struct sensor_value *val) |
| { |
| switch (chan) { |
| case SENSOR_CHAN_ACCEL_X: |
| case SENSOR_CHAN_ACCEL_Y: |
| case SENSOR_CHAN_ACCEL_Z: |
| case SENSOR_CHAN_ACCEL_XYZ: |
| iis2dlpc_channel_get_acc(dev, chan, val); |
| return 0; |
| default: |
| LOG_DBG("Channel not supported"); |
| break; |
| } |
| |
| return -ENOTSUP; |
| } |
| |
| static int iis2dlpc_config(struct device *dev, enum sensor_channel chan, |
| enum sensor_attribute attr, |
| const struct sensor_value *val) |
| { |
| switch (attr) { |
| case SENSOR_ATTR_FULL_SCALE: |
| return iis2dlpc_set_range(dev, sensor_ms2_to_g(val)); |
| case SENSOR_ATTR_SAMPLING_FREQUENCY: |
| return iis2dlpc_set_odr(dev, val->val1); |
| default: |
| LOG_DBG("Acc attribute not supported"); |
| break; |
| } |
| |
| return -ENOTSUP; |
| } |
| |
| static int iis2dlpc_attr_set(struct device *dev, enum sensor_channel chan, |
| enum sensor_attribute attr, |
| const struct sensor_value *val) |
| { |
| switch (chan) { |
| case SENSOR_CHAN_ACCEL_X: |
| case SENSOR_CHAN_ACCEL_Y: |
| case SENSOR_CHAN_ACCEL_Z: |
| case SENSOR_CHAN_ACCEL_XYZ: |
| return iis2dlpc_config(dev, chan, attr, val); |
| default: |
| LOG_DBG("Attr not supported on %d channel", chan); |
| break; |
| } |
| |
| return -ENOTSUP; |
| } |
| |
| static int iis2dlpc_sample_fetch(struct device *dev, enum sensor_channel chan) |
| { |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| const struct iis2dlpc_device_config *cfg = dev->config_info; |
| u8_t shift; |
| union axis3bit16_t buf; |
| |
| /* fetch raw data sample */ |
| if (iis2dlpc_acceleration_raw_get(iis2dlpc->ctx, buf.u8bit) < 0) { |
| LOG_DBG("Failed to fetch raw data sample"); |
| return -EIO; |
| } |
| |
| /* adjust to resolution */ |
| if (cfg->pm == IIS2DLPC_CONT_LOW_PWR_12bit) { |
| shift = IIS2DLPC_SHIFT_PM1; |
| } else { |
| shift = IIS2DLPC_SHIFT_PMOTHER; |
| } |
| |
| iis2dlpc->acc[0] = sys_le16_to_cpu(buf.i16bit[0]) >> shift; |
| iis2dlpc->acc[1] = sys_le16_to_cpu(buf.i16bit[1]) >> shift; |
| iis2dlpc->acc[2] = sys_le16_to_cpu(buf.i16bit[2]) >> shift; |
| |
| return 0; |
| } |
| |
| static const struct sensor_driver_api iis2dlpc_driver_api = { |
| .attr_set = iis2dlpc_attr_set, |
| #if CONFIG_IIS2DLPC_TRIGGER |
| .trigger_set = iis2dlpc_trigger_set, |
| #endif /* CONFIG_IIS2DLPC_TRIGGER */ |
| .sample_fetch = iis2dlpc_sample_fetch, |
| .channel_get = iis2dlpc_channel_get, |
| }; |
| |
| static int iis2dlpc_init_interface(struct device *dev) |
| { |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| const struct iis2dlpc_device_config *cfg = dev->config_info; |
| |
| iis2dlpc->bus = device_get_binding(cfg->bus_name); |
| if (!iis2dlpc->bus) { |
| LOG_DBG("master bus not found: %s", cfg->bus_name); |
| return -EINVAL; |
| } |
| |
| #if DT_ANY_INST_ON_BUS_STATUS_OKAY(spi) |
| iis2dlpc_spi_init(dev); |
| #elif DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c) |
| iis2dlpc_i2c_init(dev); |
| #else |
| #error "BUS MACRO NOT DEFINED IN DTS" |
| #endif |
| |
| return 0; |
| } |
| |
| static int iis2dlpc_set_power_mode(struct iis2dlpc_data *iis2dlpc, |
| iis2dlpc_mode_t pm) |
| { |
| u8_t regval = IIS2DLPC_CONT_LOW_PWR_12bit; |
| |
| switch (pm) { |
| case IIS2DLPC_CONT_LOW_PWR_2: |
| case IIS2DLPC_CONT_LOW_PWR_3: |
| case IIS2DLPC_CONT_LOW_PWR_4: |
| case IIS2DLPC_HIGH_PERFORMANCE: |
| regval = pm; |
| break; |
| default: |
| LOG_DBG("Apply default Power Mode"); |
| break; |
| } |
| |
| return iis2dlpc_write_reg(iis2dlpc->ctx, IIS2DLPC_CTRL1, ®val, 1); |
| } |
| |
| static int iis2dlpc_init(struct device *dev) |
| { |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| const struct iis2dlpc_device_config *cfg = dev->config_info; |
| u8_t wai; |
| |
| if (iis2dlpc_init_interface(dev)) { |
| return -EINVAL; |
| } |
| |
| /* check chip ID */ |
| if (iis2dlpc_device_id_get(iis2dlpc->ctx, &wai) < 0) { |
| return -EIO; |
| } |
| |
| if (wai != IIS2DLPC_ID) { |
| LOG_ERR("Invalid chip ID"); |
| return -EINVAL; |
| } |
| |
| /* reset device */ |
| if (iis2dlpc_reset_set(iis2dlpc->ctx, PROPERTY_ENABLE) < 0) { |
| return -EIO; |
| } |
| |
| k_busy_wait(100); |
| |
| if (iis2dlpc_block_data_update_set(iis2dlpc->ctx, |
| PROPERTY_ENABLE) < 0) { |
| return -EIO; |
| } |
| |
| /* set power mode */ |
| if (iis2dlpc_set_power_mode(iis2dlpc, CONFIG_IIS2DLPC_POWER_MODE)) { |
| return -EIO; |
| } |
| |
| /* set default odr and full scale for acc */ |
| if (iis2dlpc_data_rate_set(iis2dlpc->ctx, IIS2DLPC_DEFAULT_ODR) < 0) { |
| return -EIO; |
| } |
| |
| if (iis2dlpc_full_scale_set(iis2dlpc->ctx, IIS2DLPC_ACC_FS) < 0) { |
| return -EIO; |
| } |
| |
| iis2dlpc->gain = |
| IIS2DLPC_FS_TO_GAIN(IIS2DLPC_ACC_FS, |
| cfg->pm == IIS2DLPC_CONT_LOW_PWR_12bit ? |
| IIS2DLPC_SHFT_GAIN_NOLP1 : 0); |
| |
| #ifdef CONFIG_IIS2DLPC_TRIGGER |
| if (iis2dlpc_init_interrupt(dev) < 0) { |
| LOG_ERR("Failed to initialize interrupts"); |
| return -EIO; |
| } |
| |
| #ifdef CONFIG_IIS2DLPC_PULSE |
| if (iis2dlpc_tap_mode_set(iis2dlpc->ctx, cfg->pulse_trigger) < 0) { |
| LOG_ERR("Failed to select pulse trigger mode"); |
| return -EIO; |
| } |
| |
| if (iis2dlpc_tap_threshold_x_set(iis2dlpc->ctx, |
| cfg->pulse_ths[0]) < 0) { |
| LOG_ERR("Failed to set tap X axis threshold"); |
| return -EIO; |
| } |
| |
| if (iis2dlpc_tap_threshold_y_set(iis2dlpc->ctx, |
| cfg->pulse_ths[1]) < 0) { |
| LOG_ERR("Failed to set tap Y axis threshold"); |
| return -EIO; |
| } |
| |
| if (iis2dlpc_tap_threshold_z_set(iis2dlpc->ctx, |
| cfg->pulse_ths[2]) < 0) { |
| LOG_ERR("Failed to set tap Z axis threshold"); |
| return -EIO; |
| } |
| |
| if (iis2dlpc_tap_detection_on_x_set(iis2dlpc->ctx, |
| CONFIG_IIS2DLPC_PULSE_X) < 0) { |
| LOG_ERR("Failed to set tap detection on X axis"); |
| return -EIO; |
| } |
| |
| if (iis2dlpc_tap_detection_on_y_set(iis2dlpc->ctx, |
| CONFIG_IIS2DLPC_PULSE_Y) < 0) { |
| LOG_ERR("Failed to set tap detection on Y axis"); |
| return -EIO; |
| } |
| |
| if (iis2dlpc_tap_detection_on_z_set(iis2dlpc->ctx, |
| CONFIG_IIS2DLPC_PULSE_Z) < 0) { |
| LOG_ERR("Failed to set tap detection on Z axis"); |
| return -EIO; |
| } |
| |
| if (iis2dlpc_tap_shock_set(iis2dlpc->ctx, cfg->pulse_shock) < 0) { |
| LOG_ERR("Failed to set tap shock duration"); |
| return -EIO; |
| } |
| |
| if (iis2dlpc_tap_dur_set(iis2dlpc->ctx, cfg->pulse_ltncy) < 0) { |
| LOG_ERR("Failed to set tap latency"); |
| return -EIO; |
| } |
| |
| if (iis2dlpc_tap_quiet_set(iis2dlpc->ctx, cfg->pulse_quiet) < 0) { |
| LOG_ERR("Failed to set tap quiet time"); |
| return -EIO; |
| } |
| #endif /* CONFIG_IIS2DLPC_PULSE */ |
| #endif /* CONFIG_IIS2DLPC_TRIGGER */ |
| |
| return 0; |
| } |
| |
| const struct iis2dlpc_device_config iis2dlpc_cfg = { |
| .bus_name = DT_INST_BUS_LABEL(0), |
| .pm = CONFIG_IIS2DLPC_POWER_MODE, |
| #ifdef CONFIG_IIS2DLPC_TRIGGER |
| .int_gpio_port = DT_INST_GPIO_LABEL(0, drdy_gpios), |
| .int_gpio_pin = DT_INST_GPIO_PIN(0, drdy_gpios), |
| .int_gpio_flags = DT_INST_GPIO_FLAGS(0, drdy_gpios), |
| #if defined(CONFIG_IIS2DLPC_INT_PIN_1) |
| .int_pin = 1, |
| #elif defined(CONFIG_IIS2DLPC_INT_PIN_2) |
| .int_pin = 2, |
| #endif /* CONFIG_IIS2DLPC_INT_PIN_* */ |
| |
| #ifdef CONFIG_IIS2DLPC_PULSE |
| #if defined(CONFIG_IIS2DLPC_ONLY_SINGLE) |
| .pulse_trigger = IIS2DLPC_ONLY_SINGLE, |
| #elif defined(CONFIG_IIS2DLPC_SINGLE_DOUBLE) |
| .pulse_trigger = IIS2DLPC_BOTH_SINGLE_DOUBLE, |
| #endif |
| .pulse_ths[0] = CONFIG_IIS2DLPC_PULSE_THSX, |
| .pulse_ths[1] = CONFIG_IIS2DLPC_PULSE_THSY, |
| .pulse_ths[2] = CONFIG_IIS2DLPC_PULSE_THSZ, |
| .pulse_shock = CONFIG_IIS2DLPC_PULSE_SHOCK, |
| .pulse_ltncy = CONFIG_IIS2DLPC_PULSE_LTNCY, |
| .pulse_quiet = CONFIG_IIS2DLPC_PULSE_QUIET, |
| #endif /* CONFIG_IIS2DLPC_PULSE */ |
| #endif /* CONFIG_IIS2DLPC_TRIGGER */ |
| }; |
| |
| struct iis2dlpc_data iis2dlpc_data; |
| |
| DEVICE_AND_API_INIT(iis2dlpc, DT_INST_LABEL(0), iis2dlpc_init, |
| &iis2dlpc_data, &iis2dlpc_cfg, POST_KERNEL, |
| CONFIG_SENSOR_INIT_PRIORITY, &iis2dlpc_driver_api); |