| /* ST Microelectronics LIS2DS12 3-axis accelerometer driver |
| * |
| * Copyright (c) 2019 STMicroelectronics |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Datasheet: |
| * https://www.st.com/resource/en/datasheet/lis2ds12.pdf |
| */ |
| |
| #include <device.h> |
| #include <drivers/i2c.h> |
| #include <sys/__assert.h> |
| #include <sys/util.h> |
| #include <kernel.h> |
| #include <drivers/sensor.h> |
| #include <logging/log.h> |
| #include "lis2ds12.h" |
| |
| LOG_MODULE_DECLARE(LIS2DS12, CONFIG_SENSOR_LOG_LEVEL); |
| |
| static void lis2ds12_gpio_callback(const struct device *dev, |
| struct gpio_callback *cb, uint32_t pins) |
| { |
| struct lis2ds12_data *data = |
| CONTAINER_OF(cb, struct lis2ds12_data, gpio_cb); |
| const struct lis2ds12_config *cfg = data->dev->config; |
| |
| ARG_UNUSED(pins); |
| |
| gpio_pin_interrupt_configure(data->gpio, cfg->irq_pin, |
| GPIO_INT_DISABLE); |
| |
| #if defined(CONFIG_LIS2DS12_TRIGGER_OWN_THREAD) |
| k_sem_give(&data->trig_sem); |
| #elif defined(CONFIG_LIS2DS12_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&data->work); |
| #endif |
| } |
| |
| static void lis2ds12_handle_drdy_int(const struct device *dev) |
| { |
| struct lis2ds12_data *data = dev->data; |
| |
| if (data->data_ready_handler != NULL) { |
| data->data_ready_handler(dev, &data->data_ready_trigger); |
| } |
| } |
| |
| static void lis2ds12_handle_int(const struct device *dev) |
| { |
| struct lis2ds12_data *data = dev->data; |
| const struct lis2ds12_config *cfg = dev->config; |
| uint8_t status; |
| |
| if (data->hw_tf->read_reg(data, LIS2DS12_REG_STATUS, &status) < 0) { |
| LOG_ERR("status reading error"); |
| return; |
| } |
| |
| if (status & LIS2DS12_INT_DRDY) { |
| lis2ds12_handle_drdy_int(dev); |
| } |
| |
| gpio_pin_interrupt_configure(data->gpio, cfg->irq_pin, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| } |
| |
| #ifdef CONFIG_LIS2DS12_TRIGGER_OWN_THREAD |
| static void lis2ds12_thread(struct lis2ds12_data *data) |
| { |
| while (1) { |
| k_sem_take(&data->trig_sem, K_FOREVER); |
| lis2ds12_handle_int(data->dev); |
| } |
| } |
| #endif |
| |
| #ifdef CONFIG_LIS2DS12_TRIGGER_GLOBAL_THREAD |
| static void lis2ds12_work_cb(struct k_work *work) |
| { |
| struct lis2ds12_data *data = |
| CONTAINER_OF(work, struct lis2ds12_data, work); |
| |
| lis2ds12_handle_int(data->dev); |
| } |
| #endif |
| |
| static int lis2ds12_init_interrupt(const struct device *dev) |
| { |
| struct lis2ds12_data *data = dev->data; |
| |
| /* Enable latched mode */ |
| if (data->hw_tf->update_reg(data, |
| LIS2DS12_REG_CTRL3, |
| LIS2DS12_MASK_LIR, |
| (1 << LIS2DS12_SHIFT_LIR)) < 0) { |
| LOG_ERR("Could not enable LIR mode."); |
| return -EIO; |
| } |
| |
| /* enable data-ready interrupt */ |
| if (data->hw_tf->update_reg(data, |
| LIS2DS12_REG_CTRL4, |
| LIS2DS12_MASK_INT1_DRDY, |
| (1 << LIS2DS12_SHIFT_INT1_DRDY)) < 0) { |
| LOG_ERR("Could not enable data-ready interrupt."); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| int lis2ds12_trigger_init(const struct device *dev) |
| { |
| struct lis2ds12_data *data = dev->data; |
| const struct lis2ds12_config *cfg = dev->config; |
| |
| /* setup data ready gpio interrupt */ |
| data->gpio = device_get_binding(cfg->irq_port); |
| if (data->gpio == NULL) { |
| LOG_ERR("Cannot get pointer to %s device.", cfg->irq_port); |
| return -EINVAL; |
| } |
| |
| gpio_pin_configure(data->gpio, cfg->irq_pin, |
| GPIO_INPUT | cfg->irq_flags); |
| |
| gpio_init_callback(&data->gpio_cb, |
| lis2ds12_gpio_callback, |
| BIT(cfg->irq_pin)); |
| |
| if (gpio_add_callback(data->gpio, &data->gpio_cb) < 0) { |
| LOG_ERR("Could not set gpio callback."); |
| return -EIO; |
| } |
| data->dev = dev; |
| |
| #if defined(CONFIG_LIS2DS12_TRIGGER_OWN_THREAD) |
| k_sem_init(&data->trig_sem, 0, UINT_MAX); |
| |
| k_thread_create(&data->thread, data->thread_stack, |
| CONFIG_LIS2DS12_THREAD_STACK_SIZE, |
| (k_thread_entry_t)lis2ds12_thread, |
| data, NULL, NULL, |
| K_PRIO_COOP(CONFIG_LIS2DS12_THREAD_PRIORITY), |
| 0, K_NO_WAIT); |
| #elif defined(CONFIG_LIS2DS12_TRIGGER_GLOBAL_THREAD) |
| data->work.handler = lis2ds12_work_cb; |
| #endif |
| |
| gpio_pin_interrupt_configure(data->gpio, cfg->irq_pin, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| |
| return 0; |
| } |
| |
| int lis2ds12_trigger_set(const struct device *dev, |
| const struct sensor_trigger *trig, |
| sensor_trigger_handler_t handler) |
| { |
| struct lis2ds12_data *data = dev->data; |
| const struct lis2ds12_config *cfg = dev->config; |
| uint8_t buf[6]; |
| |
| __ASSERT_NO_MSG(trig->type == SENSOR_TRIG_DATA_READY); |
| |
| gpio_pin_interrupt_configure(data->gpio, cfg->irq_pin, |
| GPIO_INT_DISABLE); |
| |
| data->data_ready_handler = handler; |
| if (handler == NULL) { |
| LOG_WRN("lis2ds12: no handler"); |
| return 0; |
| } |
| |
| /* re-trigger lost interrupt */ |
| if (data->hw_tf->read_data(data, LIS2DS12_REG_OUTX_L, |
| buf, sizeof(buf)) < 0) { |
| LOG_ERR("status reading error"); |
| return -EIO; |
| } |
| |
| data->data_ready_trigger = *trig; |
| |
| lis2ds12_init_interrupt(dev); |
| gpio_pin_interrupt_configure(data->gpio, cfg->irq_pin, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| |
| return 0; |
| } |