| /* |
| * Copyright (c) 2023 Würth Elektronik eiSos GmbH & Co. KG |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT we_wsen_pads |
| |
| #include <zephyr/logging/log.h> |
| |
| #include "wsen_pads.h" |
| |
| LOG_MODULE_DECLARE(WSEN_PADS, CONFIG_SENSOR_LOG_LEVEL); |
| |
| /* Enable/disable data-ready interrupt handling */ |
| static inline int pads_setup_drdy_interrupt(const struct device *dev, bool enable) |
| { |
| const struct pads_config *cfg = dev->config; |
| unsigned int flags = enable ? GPIO_INT_EDGE_TO_ACTIVE : GPIO_INT_DISABLE; |
| |
| return gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, flags); |
| } |
| |
| /* |
| * Is called when a data-ready interrupt has occurred. Triggers |
| * asynchronous processing of the interrupt in pads_process_drdy_interrupt(). |
| */ |
| static inline void pads_handle_drdy_interrupt(const struct device *dev) |
| { |
| struct pads_data *data = dev->data; |
| |
| /* Disable interrupt handling until the interrupt has been processed */ |
| pads_setup_drdy_interrupt(dev, false); |
| |
| #if defined(CONFIG_WSEN_PADS_TRIGGER_OWN_THREAD) |
| k_sem_give(&data->drdy_sem); |
| #elif defined(CONFIG_WSEN_PADS_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&data->work); |
| #endif |
| } |
| |
| /* Calls data-ready trigger handler (if any) */ |
| static void pads_process_drdy_interrupt(const struct device *dev) |
| { |
| struct pads_data *data = dev->data; |
| |
| if (data->data_ready_handler != NULL) { |
| data->data_ready_handler(dev, data->data_ready_triggerP); |
| pads_setup_drdy_interrupt(dev, true); |
| } |
| } |
| |
| int pads_trigger_set(const struct device *dev, const struct sensor_trigger *trig, |
| sensor_trigger_handler_t handler) |
| { |
| struct pads_data *data = dev->data; |
| const struct pads_config *cfg = dev->config; |
| int32_t pressure_dummy; |
| |
| if (trig->type != SENSOR_TRIG_DATA_READY) { |
| LOG_ERR("Unsupported sensor trigger"); |
| return -ENOTSUP; |
| } |
| |
| pads_setup_drdy_interrupt(dev, false); |
| |
| data->data_ready_handler = handler; |
| if (handler == NULL) { |
| /* Disable data-ready interrupt */ |
| if (PADS_enableDataReadyInterrupt(&data->sensor_interface, PADS_disable) != |
| WE_SUCCESS) { |
| LOG_ERR("Failed to disable data-ready interrupt."); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| data->data_ready_triggerP = trig; |
| |
| pads_setup_drdy_interrupt(dev, true); |
| |
| /* Read pressure to retrigger interrupt */ |
| if (PADS_getPressure_int(&data->sensor_interface, &pressure_dummy) != WE_SUCCESS) { |
| LOG_ERR("Failed to read sample"); |
| return -EIO; |
| } |
| |
| /* Enable data-ready interrupt */ |
| if (PADS_enableDataReadyInterrupt(&data->sensor_interface, PADS_enable) != WE_SUCCESS) { |
| LOG_ERR("Failed to enable data-ready interrupt."); |
| return -EIO; |
| } |
| |
| /* |
| * If data-ready is active we probably won't get the rising edge, so |
| * invoke the handler manually. |
| */ |
| if (gpio_pin_get_dt(&cfg->gpio_drdy) > 0) { |
| pads_handle_drdy_interrupt(dev); |
| } |
| |
| return 0; |
| } |
| |
| static void pads_drdy_callback(const struct device *dev, struct gpio_callback *cb, uint32_t pins) |
| { |
| struct pads_data *data = CONTAINER_OF(cb, struct pads_data, data_ready_cb); |
| |
| ARG_UNUSED(pins); |
| |
| pads_handle_drdy_interrupt(data->dev); |
| } |
| |
| #ifdef CONFIG_WSEN_PADS_TRIGGER_OWN_THREAD |
| static void pads_thread(void *p1, void *p2, void *p3) |
| { |
| ARG_UNUSED(p2); |
| ARG_UNUSED(p3); |
| |
| struct pads_data *data = p1; |
| |
| while (true) { |
| k_sem_take(&data->drdy_sem, K_FOREVER); |
| pads_process_drdy_interrupt(data->dev); |
| } |
| } |
| #endif /* CONFIG_WSEN_PADS_TRIGGER_OWN_THREAD */ |
| |
| #ifdef CONFIG_WSEN_PADS_TRIGGER_GLOBAL_THREAD |
| static void pads_work_cb(struct k_work *work) |
| { |
| struct pads_data *data = CONTAINER_OF(work, struct pads_data, work); |
| |
| pads_process_drdy_interrupt(data->dev); |
| } |
| #endif /* CONFIG_WSEN_PADS_TRIGGER_GLOBAL_THREAD */ |
| |
| int pads_init_interrupt(const struct device *dev) |
| { |
| struct pads_data *data = dev->data; |
| const struct pads_config *cfg = dev->config; |
| int status; |
| |
| data->dev = dev; |
| |
| if (cfg->gpio_drdy.port == NULL) { |
| LOG_ERR("drdy-gpios is not defined in the device tree."); |
| return -EINVAL; |
| } |
| |
| if (!gpio_is_ready_dt(cfg->gpio_drdy.port)) { |
| LOG_ERR("Device %s is not ready", cfg->gpio_drdy.port->name); |
| return -ENODEV; |
| } |
| |
| /* Setup data-ready gpio interrupt */ |
| status = gpio_pin_configure_dt(&cfg->gpio_drdy, GPIO_INPUT); |
| if (status < 0) { |
| LOG_ERR("Failed to configure %s.%02u", cfg->gpio_drdy.port->name, |
| cfg->gpio_drdy.pin); |
| return status; |
| } |
| |
| gpio_init_callback(&data->data_ready_cb, pads_drdy_callback, BIT(cfg->gpio_drdy.pin)); |
| |
| status = gpio_add_callback(cfg->gpio_drdy.port, &data->data_ready_cb); |
| if (status < 0) { |
| LOG_ERR("Failed to set gpio callback."); |
| return status; |
| } |
| |
| #if defined(CONFIG_WSEN_PADS_TRIGGER_OWN_THREAD) |
| k_sem_init(&data->drdy_sem, 0, K_SEM_MAX_LIMIT); |
| |
| k_thread_create(&data->thread, data->thread_stack, CONFIG_WSEN_PADS_THREAD_STACK_SIZE, |
| pads_thread, data, NULL, NULL, |
| K_PRIO_COOP(CONFIG_WSEN_PADS_THREAD_PRIORITY), 0, K_NO_WAIT); |
| #elif defined(CONFIG_WSEN_PADS_TRIGGER_GLOBAL_THREAD) |
| data->work.handler = pads_work_cb; |
| #endif |
| |
| return pads_setup_drdy_interrupt(dev, true); |
| } |