2018-02-22 10:05:40 +01:00
|
|
|
/* lsm6dsl_spi.c - SPI routines for LSM6DSL driver
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Copyright (c) 2018 STMicroelectronics
|
|
|
|
*
|
|
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <string.h>
|
2019-06-25 21:54:01 +02:00
|
|
|
#include <drivers/spi.h>
|
2018-10-10 08:38:54 +02:00
|
|
|
#include <logging/log.h>
|
2018-02-22 10:05:40 +01:00
|
|
|
|
2020-07-11 19:57:28 +02:00
|
|
|
#include "lsm6dsl.h"
|
2018-12-14 15:34:32 +01:00
|
|
|
|
2018-02-22 10:05:40 +01:00
|
|
|
#define LSM6DSL_SPI_READ (1 << 7)
|
|
|
|
|
2019-10-11 12:40:57 +02:00
|
|
|
LOG_MODULE_DECLARE(LSM6DSL, CONFIG_SENSOR_LOG_LEVEL);
|
2018-10-10 08:38:54 +02:00
|
|
|
|
2020-07-11 17:54:05 +02:00
|
|
|
static int lsm6dsl_raw_read(struct device *dev, uint8_t reg_addr,
|
2020-05-27 18:26:57 +02:00
|
|
|
uint8_t *value, uint8_t len)
|
2018-02-22 10:05:40 +01:00
|
|
|
{
|
2020-07-11 17:54:05 +02:00
|
|
|
struct lsm6dsl_data *data = dev->driver_data;
|
2020-07-11 19:57:28 +02:00
|
|
|
const struct lsm6dsl_config *config = dev->config_info;
|
|
|
|
const struct spi_config *spi_cfg = config->spi.spi_conf;
|
2020-05-27 18:26:57 +02:00
|
|
|
uint8_t buffer_tx[2] = { reg_addr | LSM6DSL_SPI_READ, 0 };
|
2018-02-22 10:05:40 +01:00
|
|
|
const struct spi_buf tx_buf = {
|
|
|
|
.buf = buffer_tx,
|
|
|
|
.len = 2,
|
|
|
|
};
|
2018-04-10 18:13:38 +02:00
|
|
|
const struct spi_buf_set tx = {
|
|
|
|
.buffers = &tx_buf,
|
|
|
|
.count = 1
|
|
|
|
};
|
|
|
|
const struct spi_buf rx_buf[2] = {
|
2018-02-22 10:05:40 +01:00
|
|
|
{
|
|
|
|
.buf = NULL,
|
|
|
|
.len = 1,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.buf = value,
|
|
|
|
.len = len,
|
|
|
|
}
|
|
|
|
};
|
2018-04-10 18:13:38 +02:00
|
|
|
const struct spi_buf_set rx = {
|
|
|
|
.buffers = rx_buf,
|
|
|
|
.count = 2
|
|
|
|
};
|
|
|
|
|
2018-02-22 10:05:40 +01:00
|
|
|
|
|
|
|
if (len > 64) {
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
2018-04-10 18:13:38 +02:00
|
|
|
if (spi_transceive(data->comm_master, spi_cfg, &tx, &rx)) {
|
2018-02-22 10:05:40 +01:00
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2020-07-11 17:54:05 +02:00
|
|
|
static int lsm6dsl_raw_write(struct device *dev, uint8_t reg_addr,
|
2020-05-27 18:26:57 +02:00
|
|
|
uint8_t *value, uint8_t len)
|
2018-02-22 10:05:40 +01:00
|
|
|
{
|
2020-07-11 17:54:05 +02:00
|
|
|
struct lsm6dsl_data *data = dev->driver_data;
|
2020-07-11 19:57:28 +02:00
|
|
|
const struct lsm6dsl_config *config = dev->config_info;
|
|
|
|
const struct spi_config *spi_cfg = config->spi.spi_conf;
|
2020-05-27 18:26:57 +02:00
|
|
|
uint8_t buffer_tx[1] = { reg_addr & ~LSM6DSL_SPI_READ };
|
2018-04-10 18:13:38 +02:00
|
|
|
const struct spi_buf tx_buf[2] = {
|
2018-02-22 10:05:40 +01:00
|
|
|
{
|
|
|
|
.buf = buffer_tx,
|
|
|
|
.len = 1,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.buf = value,
|
|
|
|
.len = len,
|
|
|
|
}
|
|
|
|
};
|
2018-04-10 18:13:38 +02:00
|
|
|
const struct spi_buf_set tx = {
|
|
|
|
.buffers = tx_buf,
|
|
|
|
.count = 2
|
|
|
|
};
|
|
|
|
|
2018-02-22 10:05:40 +01:00
|
|
|
|
|
|
|
if (len > 64) {
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
2018-04-10 18:13:38 +02:00
|
|
|
if (spi_write(data->comm_master, spi_cfg, &tx)) {
|
2018-02-22 10:05:40 +01:00
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2020-07-11 17:54:05 +02:00
|
|
|
static int lsm6dsl_spi_read_data(struct device *dev, uint8_t reg_addr,
|
2020-05-27 18:26:57 +02:00
|
|
|
uint8_t *value, uint8_t len)
|
2018-02-22 10:05:40 +01:00
|
|
|
{
|
2020-07-11 17:54:05 +02:00
|
|
|
return lsm6dsl_raw_read(dev, reg_addr, value, len);
|
2018-02-22 10:05:40 +01:00
|
|
|
}
|
|
|
|
|
2020-07-11 17:54:05 +02:00
|
|
|
static int lsm6dsl_spi_write_data(struct device *dev, uint8_t reg_addr,
|
2020-05-27 18:26:57 +02:00
|
|
|
uint8_t *value, uint8_t len)
|
2018-02-22 10:05:40 +01:00
|
|
|
{
|
2020-07-11 17:54:05 +02:00
|
|
|
return lsm6dsl_raw_write(dev, reg_addr, value, len);
|
2018-02-22 10:05:40 +01:00
|
|
|
}
|
|
|
|
|
2020-07-11 17:54:05 +02:00
|
|
|
static int lsm6dsl_spi_read_reg(struct device *dev, uint8_t reg_addr,
|
2020-05-27 18:26:57 +02:00
|
|
|
uint8_t *value)
|
2018-02-22 10:05:40 +01:00
|
|
|
{
|
2020-07-11 17:54:05 +02:00
|
|
|
return lsm6dsl_raw_read(dev, reg_addr, value, 1);
|
2018-02-22 10:05:40 +01:00
|
|
|
}
|
|
|
|
|
2020-07-11 17:54:05 +02:00
|
|
|
static int lsm6dsl_spi_update_reg(struct device *dev, uint8_t reg_addr,
|
2020-05-27 18:26:57 +02:00
|
|
|
uint8_t mask, uint8_t value)
|
2018-02-22 10:05:40 +01:00
|
|
|
{
|
2020-05-27 18:26:57 +02:00
|
|
|
uint8_t tmp_val;
|
2018-02-22 10:05:40 +01:00
|
|
|
|
2020-07-11 17:54:05 +02:00
|
|
|
lsm6dsl_raw_read(dev, reg_addr, &tmp_val, 1);
|
2018-02-22 10:05:40 +01:00
|
|
|
tmp_val = (tmp_val & ~mask) | (value & mask);
|
2018-04-10 18:13:38 +02:00
|
|
|
|
2020-07-11 17:54:05 +02:00
|
|
|
return lsm6dsl_raw_write(dev, reg_addr, &tmp_val, 1);
|
2018-02-22 10:05:40 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static const struct lsm6dsl_transfer_function lsm6dsl_spi_transfer_fn = {
|
|
|
|
.read_data = lsm6dsl_spi_read_data,
|
|
|
|
.write_data = lsm6dsl_spi_write_data,
|
|
|
|
.read_reg = lsm6dsl_spi_read_reg,
|
|
|
|
.update_reg = lsm6dsl_spi_update_reg,
|
|
|
|
};
|
|
|
|
|
|
|
|
int lsm6dsl_spi_init(struct device *dev)
|
|
|
|
{
|
|
|
|
struct lsm6dsl_data *data = dev->driver_data;
|
2020-07-11 19:57:28 +02:00
|
|
|
const struct lsm6dsl_config *config = dev->config_info;
|
2018-02-22 10:05:40 +01:00
|
|
|
|
|
|
|
data->hw_tf = &lsm6dsl_spi_transfer_fn;
|
|
|
|
|
2020-07-11 19:57:28 +02:00
|
|
|
if (config->spi.gpio_name != NULL) {
|
|
|
|
/* The config is placed in RAM by LSM6DSL_SPI_CS_CONFIG */
|
|
|
|
struct spi_cs_control *cs =
|
|
|
|
(struct spi_cs_control *)config->spi.spi_conf->cs;
|
|
|
|
cs->gpio_dev = device_get_binding(config->spi.gpio_name);
|
|
|
|
if (!cs->gpio_dev) {
|
|
|
|
LOG_ERR("Unable to get GPIO SPI CS device");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
2019-01-31 11:16:49 +01:00
|
|
|
}
|
2018-02-22 10:05:40 +01:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|