blob: 381862b4a6046f533f2c66def6264d9f16f7ddeb [file] [log] [blame]
/*
* Copyright (c) 2017-2019 Phytec Messtechnik GmbH
* Copyright (c) 2017 Benedict Ohl (Benedict-Ohl@web.de)
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <device.h>
#include <drivers/gpio.h>
#include <drivers/i2c.h>
#include <sys/util.h>
#include <kernel.h>
#include <drivers/sensor.h>
#include "amg88xx.h"
extern struct amg88xx_data amg88xx_driver;
#include <logging/log.h>
LOG_MODULE_DECLARE(AMG88XX, CONFIG_SENSOR_LOG_LEVEL);
static inline void amg88xx_setup_int(struct amg88xx_data *drv_data,
bool enable)
{
unsigned int flags = enable
? GPIO_INT_EDGE_TO_ACTIVE
: GPIO_INT_DISABLE;
gpio_pin_interrupt_configure(drv_data->gpio,
drv_data->gpio_pin,
flags);
}
int amg88xx_attr_set(const struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
const struct sensor_value *val)
{
struct amg88xx_data *drv_data = dev->data;
const struct amg88xx_config *config = dev->config;
int16_t int_level = (val->val1 * 1000000 + val->val2) /
AMG88XX_TREG_LSB_SCALING;
uint8_t intl_reg;
uint8_t inth_reg;
if (chan != SENSOR_CHAN_AMBIENT_TEMP) {
return -ENOTSUP;
}
LOG_DBG("set threshold to %d", int_level);
if (attr == SENSOR_ATTR_UPPER_THRESH) {
intl_reg = AMG88XX_INTHL;
inth_reg = AMG88XX_INTHH;
} else if (attr == SENSOR_ATTR_LOWER_THRESH) {
intl_reg = AMG88XX_INTLL;
inth_reg = AMG88XX_INTLH;
} else {
return -ENOTSUP;
}
if (i2c_reg_write_byte(drv_data->i2c, config->i2c_address,
intl_reg, (uint8_t)int_level)) {
LOG_DBG("Failed to set INTxL attribute!");
return -EIO;
}
if (i2c_reg_write_byte(drv_data->i2c, config->i2c_address,
inth_reg, (uint8_t)(int_level >> 8))) {
LOG_DBG("Failed to set INTxH attribute!");
return -EIO;
}
return 0;
}
static void amg88xx_gpio_callback(const struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct amg88xx_data *drv_data =
CONTAINER_OF(cb, struct amg88xx_data, gpio_cb);
amg88xx_setup_int(drv_data, false);
#if defined(CONFIG_AMG88XX_TRIGGER_OWN_THREAD)
k_sem_give(&drv_data->gpio_sem);
#elif defined(CONFIG_AMG88XX_TRIGGER_GLOBAL_THREAD)
k_work_submit(&drv_data->work);
#endif
}
static void amg88xx_thread_cb(const struct device *dev)
{
struct amg88xx_data *drv_data = dev->data;
const struct amg88xx_config *config = dev->config;
uint8_t status;
if (i2c_reg_read_byte(drv_data->i2c, config->i2c_address,
AMG88XX_STAT, &status) < 0) {
return;
}
if (drv_data->drdy_handler != NULL) {
drv_data->drdy_handler(dev, &drv_data->drdy_trigger);
}
if (drv_data->th_handler != NULL) {
drv_data->th_handler(dev, &drv_data->th_trigger);
}
amg88xx_setup_int(drv_data, true);
}
#ifdef CONFIG_AMG88XX_TRIGGER_OWN_THREAD
static void amg88xx_thread(struct amg88xx_data *drv_data)
{
while (42) {
k_sem_take(&drv_data->gpio_sem, K_FOREVER);
amg88xx_thread_cb(drv_data->dev);
}
}
#endif
#ifdef CONFIG_AMG88XX_TRIGGER_GLOBAL_THREAD
static void amg88xx_work_cb(struct k_work *work)
{
struct amg88xx_data *drv_data =
CONTAINER_OF(work, struct amg88xx_data, work);
amg88xx_thread_cb(drv_data->dev);
}
#endif
int amg88xx_trigger_set(const struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
struct amg88xx_data *drv_data = dev->data;
const struct amg88xx_config *config = dev->config;
if (i2c_reg_write_byte(drv_data->i2c, config->i2c_address,
AMG88XX_INTC, AMG88XX_INTC_DISABLED)) {
return -EIO;
}
amg88xx_setup_int(drv_data, false);
if (trig->type == SENSOR_TRIG_THRESHOLD) {
drv_data->th_handler = handler;
drv_data->th_trigger = *trig;
} else {
LOG_ERR("Unsupported sensor trigger");
return -ENOTSUP;
}
amg88xx_setup_int(drv_data, true);
if (i2c_reg_write_byte(drv_data->i2c, config->i2c_address,
AMG88XX_INTC, AMG88XX_INTC_ABS_MODE)) {
return -EIO;
}
return 0;
}
int amg88xx_init_interrupt(const struct device *dev)
{
struct amg88xx_data *drv_data = dev->data;
const struct amg88xx_config *config = dev->config;
/* setup gpio interrupt */
drv_data->gpio = device_get_binding(config->gpio_name);
if (drv_data->gpio == NULL) {
LOG_DBG("Failed to get pointer to %s device!",
config->gpio_name);
return -EINVAL;
}
drv_data->gpio_pin = config->gpio_pin;
gpio_pin_configure(drv_data->gpio, config->gpio_pin,
GPIO_INPUT | config->gpio_flags);
gpio_init_callback(&drv_data->gpio_cb,
amg88xx_gpio_callback,
BIT(config->gpio_pin));
if (gpio_add_callback(drv_data->gpio, &drv_data->gpio_cb) < 0) {
LOG_DBG("Failed to set gpio callback!");
return -EIO;
}
drv_data->dev = dev;
#if defined(CONFIG_AMG88XX_TRIGGER_OWN_THREAD)
k_sem_init(&drv_data->gpio_sem, 0, K_SEM_MAX_LIMIT);
k_thread_create(&drv_data->thread, drv_data->thread_stack,
CONFIG_AMG88XX_THREAD_STACK_SIZE,
(k_thread_entry_t)amg88xx_thread, drv_data,
NULL, NULL, K_PRIO_COOP(CONFIG_AMG88XX_THREAD_PRIORITY),
0, K_NO_WAIT);
#elif defined(CONFIG_AMG88XX_TRIGGER_GLOBAL_THREAD)
drv_data->work.handler = amg88xx_work_cb;
#endif
amg88xx_setup_int(drv_data, true);
return 0;
}