/*
* Copyright (c) 2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <device.h>
#include <i2c.h>
#include <misc/__assert.h>
#include <misc/util.h>
#include <kernel.h>
#include <sensor.h>
#include "hts221.h"
int hts221_trigger_set(struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
struct hts221_data *drv_data = dev->driver_data;
__ASSERT_NO_MSG(trig->type == SENSOR_TRIG_DATA_READY);
gpio_pin_disable_callback(drv_data->gpio, CONFIG_HTS221_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_HTS221_GPIO_PIN_NUM);
return 0;
}
static void hts221_gpio_callback(struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct hts221_data *drv_data =
CONTAINER_OF(cb, struct hts221_data, gpio_cb);
ARG_UNUSED(pins);
gpio_pin_disable_callback(dev, CONFIG_HTS221_GPIO_PIN_NUM);
#if defined(CONFIG_HTS221_TRIGGER_OWN_THREAD)
k_sem_give(&drv_data->gpio_sem);
#elif defined(CONFIG_HTS221_TRIGGER_GLOBAL_THREAD)
k_work_submit(&drv_data->work);
#endif
}
static void hts221_thread_cb(void *arg)
{
struct device *dev = arg;
struct hts221_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_HTS221_GPIO_PIN_NUM);
}
#ifdef CONFIG_HTS221_TRIGGER_OWN_THREAD
static void hts221_thread(int dev_ptr, int unused)
{
struct device *dev = INT_TO_POINTER(dev_ptr);
struct hts221_data *drv_data = dev->driver_data;
ARG_UNUSED(unused);
while (1) {
k_sem_take(&drv_data->gpio_sem, K_FOREVER);
hts221_thread_cb(dev);
}
}
#endif
#ifdef CONFIG_HTS221_TRIGGER_GLOBAL_THREAD
static void hts221_work_cb(struct k_work *work)
{
struct hts221_data *drv_data =
CONTAINER_OF(work, struct hts221_data, work);
hts221_thread_cb(drv_data->dev);
}
#endif
int hts221_init_interrupt(struct device *dev)
{
struct hts221_data *drv_data = dev->driver_data;
/* setup data ready gpio interrupt */
drv_data->gpio = device_get_binding(CONFIG_HTS221_GPIO_DEV_NAME);
if (drv_data->gpio == NULL) {
SYS_LOG_ERR("Cannot get pointer to %s device.",
CONFIG_HTS221_GPIO_DEV_NAME);
return -EINVAL;
}
gpio_pin_configure(drv_data->gpio, CONFIG_HTS221_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,
hts221_gpio_callback,
BIT(CONFIG_HTS221_GPIO_PIN_NUM));
if (gpio_add_callback(drv_data->gpio, &drv_data->gpio_cb) < 0) {
SYS_LOG_ERR("Could not set gpio callback.");
return -EIO;
}
/* enable data-ready interrupt */
if (i2c_reg_write_byte(drv_data->i2c, HTS221_I2C_ADDR,
HTS221_REG_CTRL3, HTS221_DRDY_EN) < 0) {
SYS_LOG_ERR("Could not enable data-ready interrupt.");
return -EIO;
}
#if defined(CONFIG_HTS221_TRIGGER_OWN_THREAD)
k_sem_init(&drv_data->gpio_sem, 0, UINT_MAX);
k_thread_spawn(drv_data->thread_stack, CONFIG_HTS221_THREAD_STACK_SIZE,
(k_thread_entry_t)hts221_thread, POINTER_TO_INT(dev),
0, NULL, K_PRIO_COOP(CONFIG_HTS221_THREAD_PRIORITY), 0, 0);
#elif defined(CONFIG_HTS221_TRIGGER_GLOBAL_THREAD)
drv_data->work.handler = hts221_work_cb;
drv_data->dev = dev;
#endif
gpio_pin_enable_callback(drv_data->gpio, CONFIG_HTS221_GPIO_PIN_NUM);
return 0;
}