| /* ST Microelectronics IIS2DLPC 3-axis accelerometer driver |
| * |
| * Copyright (c) 2020 STMicroelectronics |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Datasheet: |
| * https://www.st.com/resource/en/datasheet/iis2dlpc.pdf |
| */ |
| |
| #define DT_DRV_COMPAT st_iis2dlpc |
| |
| #include <kernel.h> |
| #include <drivers/sensor.h> |
| #include <drivers/gpio.h> |
| #include <logging/log.h> |
| |
| #include "iis2dlpc.h" |
| |
| LOG_MODULE_DECLARE(IIS2DLPC, CONFIG_SENSOR_LOG_LEVEL); |
| |
| /** |
| * iis2dlpc_enable_int - enable selected int pin to generate interrupt |
| */ |
| static int iis2dlpc_enable_int(struct device *dev, |
| enum sensor_trigger_type type, int enable) |
| { |
| const struct iis2dlpc_device_config *cfg = dev->config_info; |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| iis2dlpc_reg_t int_route; |
| |
| if (cfg->int_pin == 1U) { |
| /* set interrupt for pin INT1 */ |
| iis2dlpc_pin_int1_route_get(iis2dlpc->ctx, |
| &int_route.ctrl4_int1_pad_ctrl); |
| |
| switch (type) { |
| case SENSOR_TRIG_DATA_READY: |
| int_route.ctrl4_int1_pad_ctrl.int1_drdy = enable; |
| break; |
| #ifdef CONFIG_IIS2DLPC_PULSE |
| case SENSOR_TRIG_TAP: |
| int_route.ctrl4_int1_pad_ctrl.int1_single_tap = enable; |
| break; |
| case SENSOR_TRIG_DOUBLE_TAP: |
| int_route.ctrl4_int1_pad_ctrl.int1_tap = enable; |
| break; |
| #endif /* CONFIG_IIS2DLPC_PULSE */ |
| default: |
| LOG_ERR("Unsupported trigger interrupt route"); |
| return -ENOTSUP; |
| } |
| |
| return iis2dlpc_pin_int1_route_set(iis2dlpc->ctx, |
| &int_route.ctrl4_int1_pad_ctrl); |
| } else { |
| /* set interrupt for pin INT2 */ |
| iis2dlpc_pin_int2_route_get(iis2dlpc->ctx, |
| &int_route.ctrl5_int2_pad_ctrl); |
| |
| switch (type) { |
| case SENSOR_TRIG_DATA_READY: |
| int_route.ctrl5_int2_pad_ctrl.int2_drdy = enable; |
| break; |
| default: |
| LOG_ERR("Unsupported trigger interrupt route"); |
| return -ENOTSUP; |
| } |
| |
| return iis2dlpc_pin_int2_route_set(iis2dlpc->ctx, |
| &int_route.ctrl5_int2_pad_ctrl); |
| } |
| } |
| |
| /** |
| * iis2dlpc_trigger_set - link external trigger to event data ready |
| */ |
| int iis2dlpc_trigger_set(struct device *dev, |
| const struct sensor_trigger *trig, |
| sensor_trigger_handler_t handler) |
| { |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| union axis3bit16_t raw; |
| int state = (handler != NULL) ? PROPERTY_ENABLE : PROPERTY_DISABLE; |
| |
| switch (trig->type) { |
| case SENSOR_TRIG_DATA_READY: |
| iis2dlpc->drdy_handler = handler; |
| if (state) { |
| /* dummy read: re-trigger interrupt */ |
| iis2dlpc_acceleration_raw_get(iis2dlpc->ctx, raw.u8bit); |
| } |
| return iis2dlpc_enable_int(dev, SENSOR_TRIG_DATA_READY, state); |
| #ifdef CONFIG_IIS2DLPC_PULSE |
| case SENSOR_TRIG_TAP: |
| iis2dlpc->tap_handler = handler; |
| return iis2dlpc_enable_int(dev, SENSOR_TRIG_TAP, state); |
| case SENSOR_TRIG_DOUBLE_TAP: |
| iis2dlpc->double_tap_handler = handler; |
| return iis2dlpc_enable_int(dev, SENSOR_TRIG_DOUBLE_TAP, state); |
| #endif /* CONFIG_IIS2DLPC_PULSE */ |
| default: |
| LOG_ERR("Unsupported sensor trigger"); |
| return -ENOTSUP; |
| } |
| } |
| |
| static int iis2dlpc_handle_drdy_int(struct device *dev) |
| { |
| struct iis2dlpc_data *data = dev->driver_data; |
| |
| struct sensor_trigger drdy_trig = { |
| .type = SENSOR_TRIG_DATA_READY, |
| .chan = SENSOR_CHAN_ALL, |
| }; |
| |
| if (data->drdy_handler) { |
| data->drdy_handler(dev, &drdy_trig); |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_IIS2DLPC_PULSE |
| static int iis2dlpc_handle_single_tap_int(struct device *dev) |
| { |
| struct iis2dlpc_data *data = dev->driver_data; |
| sensor_trigger_handler_t handler = data->tap_handler; |
| |
| struct sensor_trigger pulse_trig = { |
| .type = SENSOR_TRIG_TAP, |
| .chan = SENSOR_CHAN_ALL, |
| }; |
| |
| if (handler) { |
| handler(dev, &pulse_trig); |
| } |
| |
| return 0; |
| } |
| |
| static int iis2dlpc_handle_double_tap_int(struct device *dev) |
| { |
| struct iis2dlpc_data *data = dev->driver_data; |
| sensor_trigger_handler_t handler = data->double_tap_handler; |
| |
| struct sensor_trigger pulse_trig = { |
| .type = SENSOR_TRIG_DOUBLE_TAP, |
| .chan = SENSOR_CHAN_ALL, |
| }; |
| |
| if (handler) { |
| handler(dev, &pulse_trig); |
| } |
| |
| return 0; |
| } |
| #endif /* CONFIG_IIS2DLPC_PULSE */ |
| |
| /** |
| * iis2dlpc_handle_interrupt - handle the drdy event |
| * read data and call handler if registered any |
| */ |
| static void iis2dlpc_handle_interrupt(void *arg) |
| { |
| struct device *dev = (struct device *)arg; |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| const struct iis2dlpc_device_config *cfg = dev->config_info; |
| iis2dlpc_all_sources_t sources; |
| |
| iis2dlpc_all_sources_get(iis2dlpc->ctx, &sources); |
| |
| if (sources.status_dup.drdy) { |
| iis2dlpc_handle_drdy_int(dev); |
| } |
| #ifdef CONFIG_IIS2DLPC_PULSE |
| if (sources.status_dup.single_tap) { |
| iis2dlpc_handle_single_tap_int(dev); |
| } |
| if (sources.status_dup.double_tap) { |
| iis2dlpc_handle_double_tap_int(dev); |
| } |
| #endif /* CONFIG_IIS2DLPC_PULSE */ |
| |
| gpio_pin_interrupt_configure(iis2dlpc->gpio, cfg->int_gpio_pin, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| } |
| |
| static void iis2dlpc_gpio_callback(struct device *dev, |
| struct gpio_callback *cb, u32_t pins) |
| { |
| struct iis2dlpc_data *iis2dlpc = |
| CONTAINER_OF(cb, struct iis2dlpc_data, gpio_cb); |
| |
| if ((pins & BIT(iis2dlpc->gpio_pin)) == 0U) { |
| return; |
| } |
| |
| gpio_pin_interrupt_configure(dev, iis2dlpc->gpio_pin, |
| GPIO_INT_DISABLE); |
| |
| #if defined(CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD) |
| k_sem_give(&iis2dlpc->gpio_sem); |
| #elif defined(CONFIG_IIS2DLPC_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&iis2dlpc->work); |
| #endif /* CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD */ |
| } |
| |
| #ifdef CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD |
| static void iis2dlpc_thread(int dev_ptr, int unused) |
| { |
| struct device *dev = INT_TO_POINTER(dev_ptr); |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| |
| ARG_UNUSED(unused); |
| |
| while (1) { |
| k_sem_take(&iis2dlpc->gpio_sem, K_FOREVER); |
| iis2dlpc_handle_interrupt(dev); |
| } |
| } |
| #endif /* CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD */ |
| |
| #ifdef CONFIG_IIS2DLPC_TRIGGER_GLOBAL_THREAD |
| static void iis2dlpc_work_cb(struct k_work *work) |
| { |
| struct iis2dlpc_data *iis2dlpc = |
| CONTAINER_OF(work, struct iis2dlpc_data, work); |
| |
| iis2dlpc_handle_interrupt(iis2dlpc->dev); |
| } |
| #endif /* CONFIG_IIS2DLPC_TRIGGER_GLOBAL_THREAD */ |
| |
| int iis2dlpc_init_interrupt(struct device *dev) |
| { |
| struct iis2dlpc_data *iis2dlpc = dev->driver_data; |
| const struct iis2dlpc_device_config *cfg = dev->config_info; |
| int ret; |
| |
| /* setup data ready gpio interrupt (INT1 or INT2) */ |
| iis2dlpc->gpio = device_get_binding(cfg->int_gpio_port); |
| if (iis2dlpc->gpio == NULL) { |
| LOG_DBG("Cannot get pointer to %s device", |
| cfg->int_gpio_port); |
| return -EINVAL; |
| } |
| |
| #if defined(CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD) |
| k_sem_init(&iis2dlpc->gpio_sem, 0, UINT_MAX); |
| |
| k_thread_create(&iis2dlpc->thread, iis2dlpc->thread_stack, |
| CONFIG_IIS2DLPC_THREAD_STACK_SIZE, |
| (k_thread_entry_t)iis2dlpc_thread, dev, |
| 0, NULL, K_PRIO_COOP(CONFIG_IIS2DLPC_THREAD_PRIORITY), |
| 0, K_NO_WAIT); |
| #elif defined(CONFIG_IIS2DLPC_TRIGGER_GLOBAL_THREAD) |
| iis2dlpc->work.handler = iis2dlpc_work_cb; |
| iis2dlpc->dev = dev; |
| #endif /* CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD */ |
| |
| iis2dlpc->gpio_pin = cfg->int_gpio_pin; |
| |
| ret = gpio_pin_configure(iis2dlpc->gpio, cfg->int_gpio_pin, |
| GPIO_INPUT | cfg->int_gpio_flags); |
| if (ret < 0) { |
| LOG_DBG("Could not configure gpio"); |
| return ret; |
| } |
| |
| gpio_init_callback(&iis2dlpc->gpio_cb, |
| iis2dlpc_gpio_callback, |
| BIT(cfg->int_gpio_pin)); |
| |
| if (gpio_add_callback(iis2dlpc->gpio, &iis2dlpc->gpio_cb) < 0) { |
| LOG_DBG("Could not set gpio callback"); |
| return -EIO; |
| } |
| |
| /* enable interrupt on int1/int2 in pulse mode */ |
| if (iis2dlpc_int_notification_set(iis2dlpc->ctx, IIS2DLPC_INT_PULSED)) { |
| return -EIO; |
| } |
| |
| return gpio_pin_interrupt_configure(iis2dlpc->gpio, cfg->int_gpio_pin, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| } |