input.h

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/*
 * Copyright 2023 Google LLC
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_INPUT_H_
#define ZEPHYR_INCLUDE_INPUT_H_
 
#include <stdint.h>
#include <zephyr/device.h>
#include <zephyr/dt-bindings/input/input-event-codes.h>
#include <zephyr/kernel.h>
#include <zephyr/sys/iterable_sections.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct input_event {
        const struct device *dev;
        uint8_t sync;
        uint8_t type;
        uint16_t code;
        int32_t value;
};
 
int input_report(const struct device *dev,
                 uint8_t type, uint16_t code, int32_t value, bool sync,
                 k_timeout_t timeout);
 
static inline int input_report_key(const struct device *dev,
                                   uint16_t code, int32_t value, bool sync,
                                   k_timeout_t timeout)
{
        return input_report(dev, INPUT_EV_KEY, code, !!value, sync, timeout);
}
 
static inline int input_report_rel(const struct device *dev,
                                   uint16_t code, int32_t value, bool sync,
                                   k_timeout_t timeout)
{
        return input_report(dev, INPUT_EV_REL, code, value, sync, timeout);
}
 
static inline int input_report_abs(const struct device *dev,
                                   uint16_t code, int32_t value, bool sync,
                                   k_timeout_t timeout)
{
        return input_report(dev, INPUT_EV_ABS, code, value, sync, timeout);
}
 
bool input_queue_empty(void);
 
struct input_callback {
        const struct device *dev;
        void (*callback)(struct input_event *evt, void *user_data);
        void *user_data;
};
 
#define INPUT_CALLBACK_DEFINE_NAMED(_dev, _callback, _user_data, name)         \
        static const STRUCT_SECTION_ITERABLE(input_callback, name) = {         \
                .dev = _dev,                                                   \
                .callback = _callback,                                         \
                .user_data = _user_data,                                       \
        }
 
#define INPUT_CALLBACK_DEFINE(_dev, _callback, _user_data)                     \
        INPUT_CALLBACK_DEFINE_NAMED(_dev, _callback, _user_data,               \
                                    _input_callback__##_callback)
 
#ifdef __cplusplus
}
#endif
 
#endif /* ZEPHYR_INCLUDE_INPUT_H_ */