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/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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.
*/
/**
* @file hal_trng_lld.h
* @brief PLATFORM TRNG subsystem low level driver header.
*
* @addtogroup TRNG
* @{
*/
#ifndef HAL_TRNG_LLD_H
#define HAL_TRNG_LLD_H
#if (HAL_USE_TRNG == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name PLATFORM configuration options
* @{
*/
/**
* @brief TRNGD1 driver enable switch.
* @details If set to @p TRUE the support for TRNGD1 is included.
* @note The default is @p FALSE.
*/
#if !defined(PLATFORM_TRNG_USE_TRNG1) || defined(__DOXYGEN__)
#define PLATFORM_TRNG_USE_TRNG1 FALSE
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Driver configuration structure.
* @note It could be empty on some architectures.
*/
typedef struct {
/* End of the mandatory fields.*/
/**
* @brief Dummy configuration, it is not needed..
*/
uint32_t dummy;
} TRNGConfig;
/**
* @brief Structure representing a TRNG driver.
*/
struct TRNGDriver {
/**
* @brief Driver state.
*/
trngstate_t state;
/**
* @brief Current configuration data.
*/
const TRNGConfig *config;
#if defined(TRNG_DRIVER_EXT_FIELDS)
TRNG_DRIVER_EXT_FIELDS
#endif
/* End of the mandatory fields.*/
};
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if (PLATFORM_TRNG_USE_TRNG1 == TRUE) && !defined(__DOXYGEN__)
extern TRNGDriver TRNGD1;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void trng_lld_init(void);
void trng_lld_start(TRNGDriver *trngp);
void trng_lld_stop(TRNGDriver *trngp);
bool trng_lld_generate(TRNGDriver *trngp, size_t size, uint8_t *out);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_TRNG == TRUE */
#endif /* HAL_TRNG_LLD_H */
/** @} */
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