156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <device.h>
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#include <i2c.h>
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#include <misc/util.h>
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#include <kernel.h>
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#include <sensor.h>
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#include "lis3dh.h"
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int lis3dh_trigger_set(struct device *dev,
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const struct sensor_trigger *trig,
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sensor_trigger_handler_t handler)
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{
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struct lis3dh_data *drv_data = dev->driver_data;
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if (trig->type != SENSOR_TRIG_DATA_READY) {
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return -ENOTSUP;
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}
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gpio_pin_disable_callback(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM);
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drv_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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drv_data->data_ready_trigger = *trig;
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gpio_pin_enable_callback(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM);
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return 0;
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}
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static void lis3dh_gpio_callback(struct device *dev,
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struct gpio_callback *cb, uint32_t pins)
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{
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struct lis3dh_data *drv_data =
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CONTAINER_OF(cb, struct lis3dh_data, gpio_cb);
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ARG_UNUSED(pins);
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gpio_pin_disable_callback(dev, CONFIG_LIS3DH_GPIO_PIN_NUM);
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#if defined(CONFIG_LIS3DH_TRIGGER_OWN_THREAD)
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k_sem_give(&drv_data->gpio_sem);
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#elif defined(CONFIG_LIS3DH_TRIGGER_GLOBAL_THREAD)
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k_work_submit(&drv_data->work);
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#endif
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}
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static void lis3dh_thread_cb(void *arg)
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{
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struct device *dev = arg;
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struct lis3dh_data *drv_data = dev->driver_data;
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if (drv_data->data_ready_handler != NULL) {
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drv_data->data_ready_handler(dev,
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&drv_data->data_ready_trigger);
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}
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gpio_pin_enable_callback(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM);
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}
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#ifdef CONFIG_LIS3DH_TRIGGER_OWN_THREAD
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static void lis3dh_thread(int dev_ptr, int unused)
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{
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struct device *dev = INT_TO_POINTER(dev_ptr);
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struct lis3dh_data *drv_data = dev->driver_data;
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ARG_UNUSED(unused);
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while (1) {
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k_sem_take(&drv_data->gpio_sem, K_FOREVER);
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lis3dh_thread_cb(dev);
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}
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}
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#endif
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#ifdef CONFIG_LIS3DH_TRIGGER_GLOBAL_THREAD
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static void lis3dh_work_cb(struct k_work *work)
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{
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struct lis3dh_data *drv_data =
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CONTAINER_OF(work, struct lis3dh_data, work);
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lis3dh_thread_cb(drv_data->dev);
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}
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#endif
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int lis3dh_init_interrupt(struct device *dev)
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{
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struct lis3dh_data *drv_data = dev->driver_data;
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/* setup data ready gpio interrupt */
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drv_data->gpio = device_get_binding(CONFIG_LIS3DH_GPIO_DEV_NAME);
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if (drv_data->gpio == NULL) {
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SYS_LOG_DBG("Cannot get pointer to %s device",
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CONFIG_LIS3DH_GPIO_DEV_NAME);
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return -EINVAL;
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}
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gpio_pin_configure(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM,
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GPIO_DIR_IN | GPIO_INT | GPIO_INT_EDGE |
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GPIO_INT_ACTIVE_HIGH | GPIO_INT_DEBOUNCE);
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gpio_init_callback(&drv_data->gpio_cb,
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lis3dh_gpio_callback,
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BIT(CONFIG_LIS3DH_GPIO_PIN_NUM));
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if (gpio_add_callback(drv_data->gpio, &drv_data->gpio_cb) < 0) {
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SYS_LOG_DBG("Could not set gpio callback");
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return -EIO;
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}
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/* clear data ready interrupt line by reading sample data */
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if (lis3dh_sample_fetch(dev, SENSOR_CHAN_ALL) < 0) {
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SYS_LOG_DBG("Could not clear data ready interrupt line.");
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return -EIO;
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}
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/* enable data ready interrupt on INT1 line */
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if (i2c_reg_write_byte(drv_data->i2c, LIS3DH_I2C_ADDRESS,
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LIS3DH_REG_CTRL3, LIS3DH_EN_DRDY1_INT1) < 0) {
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SYS_LOG_DBG("Failed to enable data ready interrupt.");
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return -EIO;
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}
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#if defined(CONFIG_LIS3DH_TRIGGER_OWN_THREAD)
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k_sem_init(&drv_data->gpio_sem, 0, UINT_MAX);
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k_thread_spawn(drv_data->thread_stack, CONFIG_LIS3DH_THREAD_STACK_SIZE,
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(k_thread_entry_t)lis3dh_thread, POINTER_TO_INT(dev),
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0, NULL, K_PRIO_COOP(CONFIG_LIS3DH_THREAD_PRIORITY), 0, 0);
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#elif defined(CONFIG_LIS3DH_TRIGGER_GLOBAL_THREAD)
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drv_data->work.handler = lis3dh_work_cb;
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drv_data->dev = dev;
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#endif
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gpio_pin_enable_callback(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM);
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return 0;
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}
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