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*
* Copyright (c) 2019 STMicroelectronics
*
* SPDX-License-Identifier: Apache-2.0
*
* Datasheet:
* https://www.st.com/resource/en/datasheet/lis2ds12.pdf
*/
#define DT_DRV_COMPAT st_lis2ds12
#include <zephyr/drivers/sensor.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/init.h>
#include <string.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/sys/__assert.h>
#include <zephyr/logging/log.h>
#include "lis2ds12.h"
LOG_MODULE_REGISTER(LIS2DS12, CONFIG_SENSOR_LOG_LEVEL);
static int lis2ds12_set_odr(const struct device *dev, uint8_t odr)
{
const struct lis2ds12_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
lis2ds12_odr_t val;
/* check if power off */
if (odr == 0U) {
LOG_DBG("%s: set power-down", dev->name);
return lis2ds12_xl_data_rate_set(ctx, LIS2DS12_XL_ODR_OFF);
}
/*
* odr >= 1600Hz are available in HF mode only
* 12,5Hz <= odr <= 800Hz are available in LP and HR mode only
* odr == 1Hz is available in LP mode only
*/
if ((odr >= 9 && cfg->pm != 3) || (odr < 9 && cfg->pm == 3) ||
(odr == 1 && cfg->pm != 1)) {
LOG_ERR("%s: bad odr and pm combination", dev->name);
return -ENOTSUP;
}
switch (odr) {
case 1:
val = LIS2DS12_XL_ODR_1Hz_LP;
break;
case 2:
val = (cfg->pm == 1) ? LIS2DS12_XL_ODR_12Hz5_LP :
LIS2DS12_XL_ODR_12Hz5_HR;
break;
case 3:
val = (cfg->pm == 1) ? LIS2DS12_XL_ODR_25Hz_LP :
LIS2DS12_XL_ODR_25Hz_HR;
break;
case 4:
val = (cfg->pm == 1) ? LIS2DS12_XL_ODR_50Hz_LP :
LIS2DS12_XL_ODR_50Hz_HR;
break;
case 5:
val = (cfg->pm == 1) ? LIS2DS12_XL_ODR_100Hz_LP :
LIS2DS12_XL_ODR_100Hz_HR;
break;
case 6:
val = (cfg->pm == 1) ? LIS2DS12_XL_ODR_200Hz_LP :
LIS2DS12_XL_ODR_200Hz_HR;
break;
case 7:
val = (cfg->pm == 1) ? LIS2DS12_XL_ODR_400Hz_LP :
LIS2DS12_XL_ODR_400Hz_HR;
break;
case 8:
val = (cfg->pm == 1) ? LIS2DS12_XL_ODR_800Hz_LP :
LIS2DS12_XL_ODR_800Hz_HR;
break;
case 9:
val = LIS2DS12_XL_ODR_1k6Hz_HF;
break;
case 10:
val = LIS2DS12_XL_ODR_3k2Hz_HF;
break;
case 11:
val = LIS2DS12_XL_ODR_6k4Hz_HF;
break;
default:
LOG_ERR("%s: bad odr %d", dev->name, odr);
return -ENOTSUP;
}
return lis2ds12_xl_data_rate_set(ctx, val);
}
static int lis2ds12_set_range(const struct device *dev, uint8_t range)
{
int err;
struct lis2ds12_data *data = dev->data;
const struct lis2ds12_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
switch (range) {
default:
case 2U:
err = lis2ds12_xl_full_scale_set(ctx, LIS2DS12_2g);
data->gain = lis2ds12_from_fs2g_to_mg(1);
break;
case 4U:
err = lis2ds12_xl_full_scale_set(ctx, LIS2DS12_4g);
data->gain = lis2ds12_from_fs4g_to_mg(1);
break;
case 8U:
err = lis2ds12_xl_full_scale_set(ctx, LIS2DS12_8g);
data->gain = lis2ds12_from_fs8g_to_mg(1);
break;
case 16U:
err = lis2ds12_xl_full_scale_set(ctx, LIS2DS12_16g);
data->gain = lis2ds12_from_fs16g_to_mg(1);
break;
}
return err;
}
static int lis2ds12_accel_config(const struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
const struct sensor_value *val)
{
switch (attr) {
case SENSOR_ATTR_FULL_SCALE:
return lis2ds12_set_range(dev, sensor_ms2_to_g(val));
case SENSOR_ATTR_SAMPLING_FREQUENCY:
LOG_DBG("%s: set odr to %d Hz", dev->name, val->val1);
return lis2ds12_set_odr(dev, LIS2DS12_ODR_TO_REG(val->val1));
default:
LOG_DBG("Accel attribute not supported.");
return -ENOTSUP;
}
return 0;
}
static int lis2ds12_attr_set(const struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
const struct sensor_value *val)
{
switch (chan) {
case SENSOR_CHAN_ACCEL_XYZ:
return lis2ds12_accel_config(dev, chan, attr, val);
default:
LOG_WRN("attr_set() not supported on this channel.");
return -ENOTSUP;
}
return 0;
}
static int lis2ds12_sample_fetch_accel(const struct device *dev)
{
struct lis2ds12_data *data = dev->data;
const struct lis2ds12_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
int16_t buf[3];
/* fetch raw data sample */
if (lis2ds12_acceleration_raw_get(ctx, buf) < 0) {
LOG_ERR("Failed to fetch raw data sample");
return -EIO;
}
data->sample_x = sys_le16_to_cpu(buf[0]);
data->sample_y = sys_le16_to_cpu(buf[1]);
data->sample_z = sys_le16_to_cpu(buf[2]);
return 0;
}
static int lis2ds12_sample_fetch(const struct device *dev,
enum sensor_channel chan)
{
switch (chan) {
case SENSOR_CHAN_ACCEL_XYZ:
lis2ds12_sample_fetch_accel(dev);
break;
#if defined(CONFIG_LIS2DS12_ENABLE_TEMP)
case SENSOR_CHAN_DIE_TEMP:
/* ToDo:
lis2ds12_sample_fetch_temp(dev)
*/
break;
#endif
case SENSOR_CHAN_ALL:
lis2ds12_sample_fetch_accel(dev);
#if defined(CONFIG_LIS2DS12_ENABLE_TEMP)
/* ToDo:
lis2ds12_sample_fetch_temp(dev)
*/
#endif
break;
default:
return -ENOTSUP;
}
return 0;
}
static inline void lis2ds12_convert(struct sensor_value *val, int raw_val,
float gain)
{
int64_t dval;
/* Gain is in mg/LSB */
/* Convert to m/s^2 */
dval = ((int64_t)raw_val * gain * SENSOR_G) / 1000;
val->val1 = dval / 1000000LL;
val->val2 = dval % 1000000LL;
}
static inline int lis2ds12_get_channel(enum sensor_channel chan,
struct sensor_value *val,
struct lis2ds12_data *data,
float gain)
{
switch (chan) {
case SENSOR_CHAN_ACCEL_X:
lis2ds12_convert(val, data->sample_x, gain);
break;
case SENSOR_CHAN_ACCEL_Y:
lis2ds12_convert(val, data->sample_y, gain);
break;
case SENSOR_CHAN_ACCEL_Z:
lis2ds12_convert(val, data->sample_z, gain);
break;
case SENSOR_CHAN_ACCEL_XYZ:
lis2ds12_convert(val, data->sample_x, gain);
lis2ds12_convert(val + 1, data->sample_y, gain);
lis2ds12_convert(val + 2, data->sample_z, gain);
break;
default:
return -ENOTSUP;
}
return 0;
}
static int lis2ds12_channel_get(const struct device *dev,
enum sensor_channel chan,
struct sensor_value *val)
{
struct lis2ds12_data *data = dev->data;
return lis2ds12_get_channel(chan, val, data, data->gain);
}
static const struct sensor_driver_api lis2ds12_driver_api = {
.attr_set = lis2ds12_attr_set,
#if defined(CONFIG_LIS2DS12_TRIGGER)
.trigger_set = lis2ds12_trigger_set,
#endif
.sample_fetch = lis2ds12_sample_fetch,
.channel_get = lis2ds12_channel_get,
};
static int lis2ds12_init(const struct device *dev)
{
const struct lis2ds12_config * const cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
uint8_t chip_id;
int ret;
/* check chip ID */
ret = lis2ds12_device_id_get(ctx, &chip_id);
if (ret < 0) {
LOG_ERR("%s: Not able to read dev id", dev->name);
return ret;
}
if (chip_id != LIS2DS12_ID) {
LOG_ERR("%s: Invalid chip ID 0x%02x", dev->name, chip_id);
return -EINVAL;
}
/* reset device */
ret = lis2ds12_reset_set(ctx, PROPERTY_ENABLE);
if (ret < 0) {
return ret;
}
k_busy_wait(100);
LOG_DBG("%s: chip id 0x%x", dev->name, chip_id);
#ifdef CONFIG_LIS2DS12_TRIGGER
ret = lis2ds12_trigger_init(dev);
if (ret < 0) {
LOG_ERR("%s: Failed to initialize triggers", dev->name);
return ret;
}
#endif
/* set sensor default pm and odr */
LOG_DBG("%s: pm: %d, odr: %d", dev->name, cfg->pm, cfg->odr);
ret = lis2ds12_set_odr(dev, (cfg->pm == 0) ? 0 : cfg->odr);
if (ret < 0) {
LOG_ERR("%s: odr init error (12.5 Hz)", dev->name);
return ret;
}
/* set sensor default scale */
LOG_DBG("%s: range is %d", dev->name, cfg->range);
ret = lis2ds12_set_range(dev, cfg->range);
if (ret < 0) {
LOG_ERR("%s: range init error %d", dev->name, cfg->range);
return ret;
}
return 0;
}
#if DT_NUM_INST_STATUS_OKAY(DT_DRV_COMPAT) == 0
#warning "LIS2DS12 driver enabled without any devices"
#endif
/*
* Device creation macro, shared by LIS2DS12_DEFINE_SPI() and
* LIS2DS12_DEFINE_I2C().
*/
#define LIS2DS12_DEVICE_INIT(inst) \
DEVICE_DT_INST_DEFINE(inst, \
lis2ds12_init, \
NULL, \
&lis2ds12_data_##inst, \
&lis2ds12_config_##inst, \
POST_KERNEL, \
CONFIG_SENSOR_INIT_PRIORITY, \
&lis2ds12_driver_api);
/*
* Instantiation macros used when a device is on a SPI bus.
*/
#ifdef CONFIG_LIS2DS12_TRIGGER
#define LIS2DS12_CFG_IRQ(inst) \
.gpio_int = GPIO_DT_SPEC_INST_GET(inst, irq_gpios),
#else
#define LIS2DS12_CFG_IRQ(inst)
#endif /* CONFIG_LIS2DS12_TRIGGER */
#define LIS2DS12_SPI_OPERATION (SPI_WORD_SET(8) | \
SPI_OP_MODE_MASTER | \
SPI_MODE_CPOL | \
SPI_MODE_CPHA) \
#define LIS2DS12_CONFIG_SPI(inst) \
{ \
.ctx = { \
.read_reg = \
(stmdev_read_ptr) stmemsc_spi_read, \
.write_reg = \
(stmdev_write_ptr) stmemsc_spi_write, \
.handle = \
(void *)&lis2ds12_config_##inst.stmemsc_cfg, \
}, \
.stmemsc_cfg = { \
.spi = SPI_DT_SPEC_INST_GET(inst, \
LIS2DS12_SPI_OPERATION, \
0), \
}, \
.range = DT_INST_PROP(inst, range), \
.pm = DT_INST_PROP(inst, power_mode), \
.odr = DT_INST_PROP(inst, odr), \
COND_CODE_1(DT_INST_NODE_HAS_PROP(inst, irq_gpios), \
(LIS2DS12_CFG_IRQ(inst)), ()) \
}
/*
* Instantiation macros used when a device is on an I2C bus.
*/
#define LIS2DS12_CONFIG_I2C(inst) \
{ \
.ctx = { \
.read_reg = \
(stmdev_read_ptr) stmemsc_i2c_read, \
.write_reg = \
(stmdev_write_ptr) stmemsc_i2c_write, \
.handle = \
(void *)&lis2ds12_config_##inst.stmemsc_cfg, \
}, \
.stmemsc_cfg = { \
.i2c = I2C_DT_SPEC_INST_GET(inst), \
}, \
.range = DT_INST_PROP(inst, range), \
.pm = DT_INST_PROP(inst, power_mode), \
.odr = DT_INST_PROP(inst, odr), \
COND_CODE_1(DT_INST_NODE_HAS_PROP(inst, irq_gpios), \
(LIS2DS12_CFG_IRQ(inst)), ()) \
}
/*
* Main instantiation macro. Use of COND_CODE_1() selects the right
* bus-specific macro at preprocessor time.
*/
#define LIS2DS12_DEFINE(inst) \
static struct lis2ds12_data lis2ds12_data_##inst; \
static const struct lis2ds12_config lis2ds12_config_##inst = \
COND_CODE_1(DT_INST_ON_BUS(inst, spi), \
(LIS2DS12_CONFIG_SPI(inst)), \
(LIS2DS12_CONFIG_I2C(inst))); \
LIS2DS12_DEVICE_INIT(inst)
DT_INST_FOREACH_STATUS_OKAY(LIS2DS12_DEFINE)
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