164 lines
4.1 KiB
C
164 lines
4.1 KiB
C
/*
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* Copyright (c) 2022 Würth Elektronik eiSos GmbH & Co. KG
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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 we_wsen_hids
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#include <zephyr/logging/log.h>
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#include "wsen_hids.h"
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LOG_MODULE_DECLARE(WSEN_HIDS, CONFIG_SENSOR_LOG_LEVEL);
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static inline void hids_setup_drdy_interrupt(const struct device *dev, bool enable)
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{
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const struct hids_config *cfg = dev->config;
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unsigned int flags = enable ? GPIO_INT_EDGE_TO_ACTIVE : GPIO_INT_DISABLE;
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gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, flags);
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}
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static inline void hids_handle_drdy_interrupt(const struct device *dev)
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{
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struct hids_data *data = dev->data;
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hids_setup_drdy_interrupt(dev, false);
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#if defined(CONFIG_WSEN_HIDS_TRIGGER_OWN_THREAD)
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k_sem_give(&data->drdy_sem);
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#elif defined(CONFIG_WSEN_HIDS_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 hids_process_drdy_interrupt(const struct device *dev)
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{
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struct hids_data *data = dev->data;
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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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if (data->data_ready_handler != NULL) {
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hids_setup_drdy_interrupt(dev, true);
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}
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}
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int hids_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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struct hids_data *data = dev->data;
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const struct hids_config *cfg = dev->config;
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if (trig->type != SENSOR_TRIG_DATA_READY) {
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LOG_ERR("Unsupported sensor trigger");
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return -ENOTSUP;
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}
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hids_setup_drdy_interrupt(dev, false);
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data->data_ready_handler = handler;
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if (handler == NULL) {
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return 0;
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}
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data->data_ready_trigger = *trig;
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hids_setup_drdy_interrupt(dev, true);
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/*
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* If DRDY is active we probably won't get the rising edge, so
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* invoke the callback manually.
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*/
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if (gpio_pin_get_dt(&cfg->gpio_drdy) > 0) {
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hids_handle_drdy_interrupt(dev);
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}
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return 0;
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}
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static void hids_drdy_callback(const struct device *dev, struct gpio_callback *cb, uint32_t pins)
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{
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struct hids_data *data = CONTAINER_OF(cb, struct hids_data, data_ready_cb);
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ARG_UNUSED(pins);
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hids_handle_drdy_interrupt(data->dev);
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}
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#ifdef CONFIG_WSEN_HIDS_TRIGGER_OWN_THREAD
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static void hids_thread(struct hids_data *data)
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{
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while (true) {
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k_sem_take(&data->drdy_sem, K_FOREVER);
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hids_process_drdy_interrupt(data->dev);
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}
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}
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#endif /* CONFIG_WSEN_HIDS_TRIGGER_OWN_THREAD */
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#ifdef CONFIG_WSEN_HIDS_TRIGGER_GLOBAL_THREAD
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static void hids_work_cb(struct k_work *work)
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{
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struct hids_data *data = CONTAINER_OF(work, struct hids_data, work);
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hids_process_drdy_interrupt(data->dev);
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}
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#endif /* CONFIG_WSEN_HIDS_TRIGGER_GLOBAL_THREAD */
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int hids_init_interrupt(const struct device *dev)
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{
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struct hids_data *data = dev->data;
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const struct hids_config *cfg = dev->config;
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int status;
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data->dev = dev;
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if (cfg->gpio_drdy.port == NULL) {
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LOG_ERR("drdy-gpios is not defined in the device tree.");
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return -EINVAL;
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}
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if (!device_is_ready(cfg->gpio_drdy.port)) {
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LOG_ERR("Device %s is not ready", cfg->gpio_drdy.port->name);
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return -ENODEV;
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}
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/* Setup data-ready gpio interrupt */
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status = gpio_pin_configure_dt(&cfg->gpio_drdy, GPIO_INPUT);
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if (status < 0) {
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LOG_ERR("Could not configure %s.%02u", cfg->gpio_drdy.port->name,
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cfg->gpio_drdy.pin);
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return status;
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}
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gpio_init_callback(&data->data_ready_cb, hids_drdy_callback, BIT(cfg->gpio_drdy.pin));
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status = gpio_add_callback(cfg->gpio_drdy.port, &data->data_ready_cb);
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if (status < 0) {
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LOG_ERR("Could not set gpio callback.");
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return status;
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}
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/* Enable data-ready interrupt */
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if (HIDS_enableDataReadyInterrupt(&data->sensor_interface, HIDS_enable) != WE_SUCCESS) {
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LOG_ERR("Could not enable data-ready interrupt.");
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return -EIO;
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}
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#if defined(CONFIG_WSEN_HIDS_TRIGGER_OWN_THREAD)
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k_sem_init(&data->drdy_sem, 0, K_SEM_MAX_LIMIT);
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k_thread_create(&data->thread, data->thread_stack, CONFIG_WSEN_HIDS_THREAD_STACK_SIZE,
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(k_thread_entry_t)hids_thread, data, NULL, NULL,
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K_PRIO_COOP(CONFIG_WSEN_HIDS_THREAD_PRIORITY), 0, K_NO_WAIT);
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#elif defined(CONFIG_WSEN_HIDS_TRIGGER_GLOBAL_THREAD)
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data->work.handler = hids_work_cb;
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#endif
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hids_setup_drdy_interrupt(dev, true);
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return 0;
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}
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