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/*
* Copyright (c) 2019 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief Public API for PS/2 devices such as keyboard and mouse.
* Callers of this API are responsible for setting the typematic rate
* and decode keys using their desired scan code tables.
*/
#ifndef ZEPHYR_INCLUDE_DRIVERS_PS2_H_
#define ZEPHYR_INCLUDE_DRIVERS_PS2_H_
#include <errno.h>
#include <zephyr/types.h>
#include <stddef.h>
#include <zephyr/device.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief PS/2 Driver APIs
* @defgroup ps2_interface PS/2 Driver APIs
* @ingroup io_interfaces
* @{
*/
/**
* @brief PS/2 callback called when user types or click a mouse.
*
* @param dev Pointer to the device structure for the driver instance.
* @param data Data byte passed pack to the user.
*/
typedef void (*ps2_callback_t)(const struct device *dev, uint8_t data);
/**
* @cond INTERNAL_HIDDEN
*
* PS2 driver API definition and system call entry points
*
* (Internal use only.)
*/
typedef int (*ps2_config_t)(const struct device *dev,
ps2_callback_t callback_isr);
typedef int (*ps2_read_t)(const struct device *dev, uint8_t *value);
typedef int (*ps2_write_t)(const struct device *dev, uint8_t value);
typedef int (*ps2_disable_callback_t)(const struct device *dev);
typedef int (*ps2_enable_callback_t)(const struct device *dev);
__subsystem struct ps2_driver_api {
ps2_config_t config;
ps2_read_t read;
ps2_write_t write;
ps2_disable_callback_t disable_callback;
ps2_enable_callback_t enable_callback;
};
/**
* @endcond
*/
/**
* @brief Configure a ps2 instance.
*
* @param dev Pointer to the device structure for the driver instance.
* @param callback_isr called when PS/2 devices reply to a configuration
* command or when a mouse/keyboard send data to the client application.
*
* @retval 0 If successful.
* @retval Negative errno code if failure.
*/
__syscall int ps2_config(const struct device *dev,
ps2_callback_t callback_isr);
static inline int z_impl_ps2_config(const struct device *dev,
ps2_callback_t callback_isr)
{
const struct ps2_driver_api *api =
(struct ps2_driver_api *)dev->api;
return api->config(dev, callback_isr);
}
/**
* @brief Write to PS/2 device.
*
* @param dev Pointer to the device structure for the driver instance.
* @param value Data for the PS2 device.
*
* @retval 0 If successful.
* @retval Negative errno code if failure.
*/
__syscall int ps2_write(const struct device *dev, uint8_t value);
static inline int z_impl_ps2_write(const struct device *dev, uint8_t value)
{
const struct ps2_driver_api *api =
(const struct ps2_driver_api *)dev->api;
return api->write(dev, value);
}
/**
* @brief Read slave-to-host values from PS/2 device.
* @param dev Pointer to the device structure for the driver instance.
* @param value Pointer used for reading the PS/2 device.
*
* @retval 0 If successful.
* @retval Negative errno code if failure.
*/
__syscall int ps2_read(const struct device *dev, uint8_t *value);
static inline int z_impl_ps2_read(const struct device *dev, uint8_t *value)
{
const struct ps2_driver_api *api =
(const struct ps2_driver_api *)dev->api;
return api->read(dev, value);
}
/**
* @brief Enables callback.
* @param dev Pointer to the device structure for the driver instance.
*
* @retval 0 If successful.
* @retval Negative errno code if failure.
*/
__syscall int ps2_enable_callback(const struct device *dev);
static inline int z_impl_ps2_enable_callback(const struct device *dev)
{
const struct ps2_driver_api *api =
(const struct ps2_driver_api *)dev->api;
if (api->enable_callback == NULL) {
return -ENOSYS;
}
return api->enable_callback(dev);
}
/**
* @brief Disables callback.
* @param dev Pointer to the device structure for the driver instance.
*
* @retval 0 If successful.
* @retval Negative errno code if failure.
*/
__syscall int ps2_disable_callback(const struct device *dev);
static inline int z_impl_ps2_disable_callback(const struct device *dev)
{
const struct ps2_driver_api *api =
(const struct ps2_driver_api *)dev->api;
if (api->disable_callback == NULL) {
return -ENOSYS;
}
return api->disable_callback(dev);
}
#ifdef __cplusplus
}
#endif
/**
* @}
*/
#include <zephyr/syscalls/ps2.h>
#endif /* ZEPHYR_INCLUDE_DRIVERS_PS2_H_ */