116 lines
4.4 KiB
C
116 lines
4.4 KiB
C
/***************************************************************************//**
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* @file trng.h
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* @brief Header file of true random number generator
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* @author Mihail Chindris ([email protected])
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********************************************************************************
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* @copyright
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* Copyright 2020(c) Analog Devices, Inc.
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Analog Devices, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* - The use of this software may or may not infringe the patent rights
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* of one or more patent holders. This license does not release you
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* from the requirement that you obtain separate licenses from these
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* patent holders to use this software.
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* - Use of the software either in source or binary form, must be run
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* on or directly connected to an Analog Devices Inc. component.
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*
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* THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************/
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#ifndef _TRNG_H_
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#define _TRNG_H_
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/******************************************************************************/
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/***************************** Include Files **********************************/
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/******************************************************************************/
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#include <stdint.h>
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/******************************************************************************/
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/*************************** Types Declarations *******************************/
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/******************************************************************************/
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/**
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* @struct trng_platform_ops
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* @brief Structure holding TRNG function pointers that point to the platform
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* specific function
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*/
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struct trng_platform_ops;
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/**
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* @struct trng_desc
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* @brief TRNG Descriptor
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*/
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struct trng_desc {
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/** Platform ops */
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const struct trng_platform_ops *platform_ops;
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/** Platform specific parameters */
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void *extra;
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};
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/**
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* @struct trng_init_param
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* @brief Init parameter for TRNG
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*/
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struct trng_init_param {
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/** Device id */
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uint32_t dev_id;
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/** Platform specific parameter */
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void *extra;
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/** Platform ops */
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const struct trng_platform_ops *platform_ops;
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};
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/**
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* @struct trng_platform_ops
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* @brief Structure holding TRNG function pointers that point to the platform
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* specific function
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*/
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struct trng_platform_ops {
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/** TRNG initialization function pointer */
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int (*init)(struct trng_desc **,
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const struct trng_init_param *);
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/** Fill buffer with random numbers */
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int (*fill_buffer)(struct trng_desc *, uint8_t *, uint32_t);
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/** TRNG remove function pointer */
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int (*remove)(struct trng_desc *);
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};
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/******************************************************************************/
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/************************ Functions Declarations ******************************/
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/******************************************************************************/
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/* Initialize descriptor */
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int trng_init(struct trng_desc **desc,
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const struct trng_init_param *param);
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/* Free resources allocated in descriptor */
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int trng_remove(struct trng_desc *desc);
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/* Fill buffer with random numbers */
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int trng_fill_buffer(struct trng_desc *desc, uint8_t *buff,
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uint32_t len);
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#endif // _TRNG_H_
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