153 lines
3.6 KiB
C
153 lines
3.6 KiB
C
/*
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* Copyright (c) 2024 Gustavo Silva
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT sciosense_ens160
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#include <zephyr/kernel.h>
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#include "ens160.h"
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LOG_MODULE_DECLARE(ENS160, CONFIG_SENSOR_LOG_LEVEL);
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static inline void ens160_setup_int(const struct device *dev, bool enable)
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{
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const struct ens160_config *config = dev->config;
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gpio_flags_t flags = enable ? GPIO_INT_EDGE_TO_ACTIVE : GPIO_INT_DISABLE;
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(void)gpio_pin_interrupt_configure_dt(&config->int_gpio, flags);
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}
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static void ens160_gpio_callback(const struct device *dev, struct gpio_callback *cb, uint32_t pins)
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{
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struct ens160_data *data = CONTAINER_OF(cb, struct ens160_data, gpio_cb);
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ens160_setup_int(data->dev, false);
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#if defined(CONFIG_ENS160_TRIGGER_OWN_THREAD)
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k_sem_give(&data->gpio_sem);
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#elif defined(CONFIG_ENS160_TRIGGER_GLOBAL_THREAD)
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k_work_submit(&data->work);
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#endif
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}
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static void ens160_thread_cb(const struct device *dev)
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{
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struct ens160_data *data = dev->data;
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uint8_t status;
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int ret;
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ret = data->tf->read_reg(dev, ENS160_REG_DEVICE_STATUS, &status);
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if (ret < 0) {
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return;
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}
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if (FIELD_GET(ENS160_STATUS_NEWDAT, status) != 0x01) {
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LOG_ERR("Data is not ready");
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return;
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}
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if (data->data_ready_handler != NULL) {
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data->data_ready_handler(dev, data->data_ready_trigger);
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}
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ens160_setup_int(dev, true);
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}
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#ifdef CONFIG_ENS160_TRIGGER_OWN_THREAD
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static void ens160_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 ens160_data *data = p1;
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while (1) {
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k_sem_take(&data->gpio_sem, K_FOREVER);
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ens160_thread_cb(data->dev);
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}
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}
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#endif /* CONFIG_ENS160_TRIGGER_OWN_THREAD */
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#ifdef CONFIG_ENS160_TRIGGER_GLOBAL_THREAD
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static void ens160_work_cb(struct k_work *work)
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{
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struct ens160_data *data = CONTAINER_OF(work, struct ens160_data, work);
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ens160_thread_cb(data->dev);
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}
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#endif /* CONFIG_ENS160_TRIGGER_GLOBAL_THREAD */
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int ens160_trigger_set(const struct device *dev, const struct sensor_trigger *trig,
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sensor_trigger_handler_t handler)
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{
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const struct ens160_config *config = dev->config;
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struct ens160_data *data = dev->data;
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if (!config->int_gpio.port) {
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return -ENOTSUP;
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}
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ens160_setup_int(dev, false);
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if (trig->type == SENSOR_TRIG_DATA_READY) {
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data->data_ready_handler = handler;
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data->data_ready_trigger = trig;
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}
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ens160_setup_int(dev, true);
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return 0;
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}
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int ens160_init_interrupt(const struct device *dev)
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{
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const struct ens160_config *config = dev->config;
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struct ens160_data *data = dev->data;
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int ret;
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uint8_t int_cfg = ENS160_CONFIG_INTEN | ENS160_CONFIG_INTDAT | ENS160_CONFIG_INT_CFG;
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ret = data->tf->write_reg(dev, ENS160_REG_CONFIG, int_cfg);
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if (ret < 0) {
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LOG_ERR("Failed to write to config register");
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return -EIO;
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}
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if (!gpio_is_ready_dt(&config->int_gpio)) {
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LOG_ERR("%s: device %s is not ready", dev->name, config->int_gpio.port->name);
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return -ENODEV;
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}
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gpio_pin_configure_dt(&config->int_gpio, GPIO_INPUT);
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gpio_init_callback(&data->gpio_cb, ens160_gpio_callback, BIT(config->int_gpio.pin));
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ret = gpio_add_callback(config->int_gpio.port, &data->gpio_cb);
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if (ret < 0) {
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LOG_ERR("Failed to set gpio callback");
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return -EIO;
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}
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ret = gpio_pin_interrupt_configure_dt(&config->int_gpio, GPIO_INT_EDGE_TO_ACTIVE);
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if (ret < 0) {
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return ret;
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}
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data->dev = dev;
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#if defined(CONFIG_ENS160_TRIGGER_OWN_THREAD)
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k_sem_init(&data->gpio_sem, 0, K_SEM_MAX_LIMIT);
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k_thread_create(&data->thread, data->thread_stack, CONFIG_ENS160_THREAD_STACK_SIZE,
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ens160_thread, data, NULL, NULL, K_PRIO_COOP(CONFIG_ENS160_THREAD_PRIORITY),
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0, K_NO_WAIT);
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#elif defined(CONFIG_ENS160_TRIGGER_GLOBAL_THREAD)
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data->work.handler = ens160_work_cb;
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#endif
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return 0;
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}
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