/*
* Copyright (c) 2016 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <device.h>
#include <misc/util.h>
#include <nanokernel.h>
#include <sensor.h>
#include "sensor_lis3dh.h"
int lis3dh_trigger_set(struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
struct lis3dh_data *drv_data = dev->driver_data;
if (trig->type != SENSOR_TRIG_DATA_READY) {
return -ENOTSUP;
}
gpio_pin_disable_callback(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM);
drv_data->data_ready_handler = handler;
if (handler == NULL) {
return 0;
}
drv_data->data_ready_trigger = *trig;
gpio_pin_enable_callback(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM);
return 0;
}
static void lis3dh_gpio_callback(struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct lis3dh_data *drv_data =
CONTAINER_OF(cb, struct lis3dh_data, gpio_cb);
ARG_UNUSED(pins);
gpio_pin_disable_callback(dev, CONFIG_LIS3DH_GPIO_PIN_NUM);
#if defined(CONFIG_LIS3DH_TRIGGER_OWN_FIBER)
nano_sem_give(&drv_data->gpio_sem);
#elif defined(CONFIG_LIS3DH_TRIGGER_GLOBAL_FIBER)
nano_isr_fifo_put(sensor_get_work_fifo(), &drv_data->work);
#endif
}
static void lis3dh_fiber_cb(void *arg)
{
struct device *dev = arg;
struct lis3dh_data *drv_data = dev->driver_data;
if (drv_data->data_ready_handler != NULL) {
drv_data->data_ready_handler(dev,
&drv_data->data_ready_trigger);
}
gpio_pin_enable_callback(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM);
}
#ifdef CONFIG_LIS3DH_TRIGGER_OWN_FIBER
static void lis3dh_fiber(int dev_ptr, int unused)
{
struct device *dev = INT_TO_POINTER(dev_ptr);
struct lis3dh_data *drv_data = dev->driver_data;
ARG_UNUSED(unused);
while (1) {
nano_fiber_sem_take(&drv_data->gpio_sem, TICKS_UNLIMITED);
lis3dh_fiber_cb(dev);
}
}
#endif
int lis3dh_init_interrupt(struct device *dev)
{
struct lis3dh_data *drv_data = dev->driver_data;
int rc;
/* setup data ready gpio interrupt */
drv_data->gpio = device_get_binding(CONFIG_LIS3DH_GPIO_DEV_NAME);
if (drv_data->gpio == NULL) {
DBG("Cannot get pointer to %s device\n",
CONFIG_LIS3DH_GPIO_DEV_NAME);
return -EINVAL;
}
gpio_pin_configure(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM,
GPIO_DIR_IN | GPIO_INT | GPIO_INT_EDGE |
GPIO_INT_ACTIVE_HIGH | GPIO_INT_DEBOUNCE);
gpio_init_callback(&drv_data->gpio_cb,
lis3dh_gpio_callback,
BIT(CONFIG_LIS3DH_GPIO_PIN_NUM));
rc = gpio_add_callback(drv_data->gpio, &drv_data->gpio_cb);
if (rc != 0) {
DBG("Could not set gpio callback\n");
return -EIO;
}
/* clear data ready interrupt line by reading sample data */
rc = lis3dh_sample_fetch(dev);
if (rc != 0) {
DBG("Could not clear data ready interrupt line.\n");
return -EIO;
}
/* enable data ready interrupt on INT1 line */
rc = lis3dh_reg_write(drv_data, LIS3DH_REG_CTRL3,
LIS3DH_EN_DRDY1_INT1);
if (rc != 0) {
DBG("Failed to enable data ready interrupt.\n");
return -EIO;
}
#if defined(CONFIG_LIS3DH_TRIGGER_OWN_FIBER)
nano_sem_init(&drv_data->gpio_sem);
fiber_start(drv_data->fiber_stack, CONFIG_LIS3DH_FIBER_STACK_SIZE,
(nano_fiber_entry_t)lis3dh_fiber, POINTER_TO_INT(dev),
0, CONFIG_LIS3DH_FIBER_PRIORITY, 0);
#elif defined(CONFIG_LIS3DH_TRIGGER_GLOBAL_FIBER)
drv_data->work.handler = lis3dh_fiber_cb;
drv_data->work.arg = dev;
#endif
gpio_pin_enable_callback(drv_data->gpio, CONFIG_LIS3DH_GPIO_PIN_NUM);
return 0;
}