265 lines
6.9 KiB
C
265 lines
6.9 KiB
C
/* ST Microelectronics IIS2ICLX 2-axis accelerometer sensor driver
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*
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* Copyright (c) 2020 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Datasheet:
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* https://www.st.com/resource/en/datasheet/iis2iclx.pdf
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*/
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#define DT_DRV_COMPAT st_iis2iclx
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#include <zephyr/kernel.h>
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#include <zephyr/drivers/sensor.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/logging/log.h>
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#include "iis2iclx.h"
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LOG_MODULE_DECLARE(IIS2ICLX, CONFIG_SENSOR_LOG_LEVEL);
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#if defined(CONFIG_IIS2ICLX_ENABLE_TEMP)
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/**
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* iis2iclx_enable_t_int - TEMP enable selected int pin to generate interrupt
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*/
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static int iis2iclx_enable_t_int(const struct device *dev, int enable)
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{
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const struct iis2iclx_config *cfg = dev->config;
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iis2iclx_pin_int2_route_t int2_route;
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if (enable) {
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int16_t buf;
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/* dummy read: re-trigger interrupt */
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iis2iclx_temperature_raw_get((stmdev_ctx_t *)&cfg->ctx, &buf);
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}
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/* set interrupt (TEMP DRDY interrupt is only on INT2) */
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if (cfg->int_pin == 1) {
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return -EIO;
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}
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iis2iclx_read_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL,
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(uint8_t *)&int2_route.int2_ctrl, 1);
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int2_route.int2_ctrl.int2_drdy_temp = enable;
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return iis2iclx_write_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL,
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(uint8_t *)&int2_route.int2_ctrl, 1);
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}
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#endif
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/**
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* iis2iclx_enable_xl_int - XL enable selected int pin to generate interrupt
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*/
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static int iis2iclx_enable_xl_int(const struct device *dev, int enable)
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{
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const struct iis2iclx_config *cfg = dev->config;
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if (enable) {
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int16_t buf[3];
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/* dummy read: re-trigger interrupt */
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iis2iclx_acceleration_raw_get((stmdev_ctx_t *)&cfg->ctx, buf);
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}
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/* set interrupt */
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if (cfg->int_pin == 1) {
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iis2iclx_pin_int1_route_t int1_route;
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iis2iclx_read_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT1_CTRL,
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(uint8_t *)&int1_route.int1_ctrl, 1);
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int1_route.int1_ctrl.int1_drdy_xl = enable;
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return iis2iclx_write_reg((stmdev_ctx_t *)&cfg->ctx,
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IIS2ICLX_INT1_CTRL,
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(uint8_t *)&int1_route.int1_ctrl, 1);
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} else {
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iis2iclx_pin_int2_route_t int2_route;
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iis2iclx_read_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL,
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(uint8_t *)&int2_route.int2_ctrl, 1);
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int2_route.int2_ctrl.int2_drdy_xl = enable;
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return iis2iclx_write_reg((stmdev_ctx_t *)&cfg->ctx,
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IIS2ICLX_INT2_CTRL,
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(uint8_t *)&int2_route.int2_ctrl, 1);
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}
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}
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/**
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* iis2iclx_trigger_set - link external trigger to event data ready
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*/
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int iis2iclx_trigger_set(const struct device *dev,
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const struct sensor_trigger *trig,
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sensor_trigger_handler_t handler)
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{
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const struct iis2iclx_config *cfg = dev->config;
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struct iis2iclx_data *iis2iclx = dev->data;
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if (!cfg->trig_enabled) {
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LOG_ERR("trigger_set op not supported");
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return -ENOTSUP;
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}
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if (trig->chan == SENSOR_CHAN_ACCEL_XYZ) {
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iis2iclx->handler_drdy_acc = handler;
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iis2iclx->trig_drdy_acc = trig;
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if (handler) {
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return iis2iclx_enable_xl_int(dev, IIS2ICLX_EN_BIT);
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} else {
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return iis2iclx_enable_xl_int(dev, IIS2ICLX_DIS_BIT);
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}
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}
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#if defined(CONFIG_IIS2ICLX_ENABLE_TEMP)
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else if (trig->chan == SENSOR_CHAN_DIE_TEMP) {
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iis2iclx->handler_drdy_temp = handler;
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iis2iclx->trig_drdy_temp = trig;
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if (handler) {
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return iis2iclx_enable_t_int(dev, IIS2ICLX_EN_BIT);
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} else {
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return iis2iclx_enable_t_int(dev, IIS2ICLX_DIS_BIT);
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}
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}
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#endif
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return -ENOTSUP;
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}
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/**
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* iis2iclx_handle_interrupt - handle the drdy event
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* read data and call handler if registered any
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*/
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static void iis2iclx_handle_interrupt(const struct device *dev)
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{
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struct iis2iclx_data *iis2iclx = dev->data;
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const struct iis2iclx_config *cfg = dev->config;
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iis2iclx_status_reg_t status;
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while (1) {
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if (iis2iclx_status_reg_get((stmdev_ctx_t *)&cfg->ctx,
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&status) < 0) {
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LOG_DBG("failed reading status reg");
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return;
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}
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if (status.xlda == 0
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#if defined(CONFIG_IIS2ICLX_ENABLE_TEMP)
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&& status.tda == 0
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#endif
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) {
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break;
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}
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if ((status.xlda) && (iis2iclx->handler_drdy_acc != NULL)) {
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iis2iclx->handler_drdy_acc(dev, iis2iclx->trig_drdy_acc);
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}
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#if defined(CONFIG_IIS2ICLX_ENABLE_TEMP)
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if ((status.tda) && (iis2iclx->handler_drdy_temp != NULL)) {
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iis2iclx->handler_drdy_temp(dev, iis2iclx->trig_drdy_temp);
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}
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#endif
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}
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gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy,
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GPIO_INT_EDGE_TO_ACTIVE);
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}
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static void iis2iclx_gpio_callback(const struct device *dev,
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struct gpio_callback *cb, uint32_t pins)
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{
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struct iis2iclx_data *iis2iclx =
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CONTAINER_OF(cb, struct iis2iclx_data, gpio_cb);
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const struct iis2iclx_config *cfg = iis2iclx->dev->config;
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ARG_UNUSED(pins);
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gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, GPIO_INT_DISABLE);
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#if defined(CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD)
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k_sem_give(&iis2iclx->gpio_sem);
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#elif defined(CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD)
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k_work_submit(&iis2iclx->work);
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#endif /* CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD */
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}
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#ifdef CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD
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static void iis2iclx_thread(void *p1, void *p2, void *p3)
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{
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ARG_UNUSED(p2);
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ARG_UNUSED(p3);
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struct iis2iclx_data *iis2iclx = p1;
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while (1) {
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k_sem_take(&iis2iclx->gpio_sem, K_FOREVER);
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iis2iclx_handle_interrupt(iis2iclx->dev);
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}
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}
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#endif /* CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD */
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#ifdef CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD
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static void iis2iclx_work_cb(struct k_work *work)
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{
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struct iis2iclx_data *iis2iclx =
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CONTAINER_OF(work, struct iis2iclx_data, work);
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iis2iclx_handle_interrupt(iis2iclx->dev);
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}
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#endif /* CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD */
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int iis2iclx_init_interrupt(const struct device *dev)
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{
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struct iis2iclx_data *iis2iclx = dev->data;
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const struct iis2iclx_config *cfg = dev->config;
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int ret;
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/* setup data ready gpio interrupt (INT1 or INT2) */
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if (!gpio_is_ready_dt(&cfg->gpio_drdy)) {
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LOG_ERR("Cannot get pointer to drdy_gpio device");
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return -EINVAL;
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}
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#if defined(CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD)
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k_sem_init(&iis2iclx->gpio_sem, 0, K_SEM_MAX_LIMIT);
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k_thread_create(&iis2iclx->thread, iis2iclx->thread_stack,
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CONFIG_IIS2ICLX_THREAD_STACK_SIZE,
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iis2iclx_thread,
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iis2iclx, NULL, NULL,
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K_PRIO_COOP(CONFIG_IIS2ICLX_THREAD_PRIORITY),
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0, K_NO_WAIT);
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#elif defined(CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD)
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iis2iclx->work.handler = iis2iclx_work_cb;
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#endif /* CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD */
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ret = gpio_pin_configure_dt(&cfg->gpio_drdy, GPIO_INPUT);
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if (ret < 0) {
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LOG_ERR("Could not configure gpio");
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return ret;
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}
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gpio_init_callback(&iis2iclx->gpio_cb,
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iis2iclx_gpio_callback,
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BIT(cfg->gpio_drdy.pin));
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if (gpio_add_callback(cfg->gpio_drdy.port, &iis2iclx->gpio_cb) < 0) {
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LOG_ERR("Could not set gpio callback");
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return -EIO;
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}
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/* enable interrupt on int1/int2 in pulse mode */
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if (iis2iclx_int_notification_set((stmdev_ctx_t *)&cfg->ctx,
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IIS2ICLX_ALL_INT_PULSED) < 0) {
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LOG_ERR("Could not set pulse mode");
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return -EIO;
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}
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if (gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy,
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GPIO_INT_EDGE_TO_ACTIVE) < 0) {
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LOG_ERR("Could not configure interrupt");
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return -EIO;
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}
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return 0;
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}
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