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/*
* Copyright (c) 2014, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __FSL_RNGA_DRIVER_H__
#define __FSL_RNGA_DRIVER_H__
#include <assert.h>
#include <stdint.h>
#include <stdbool.h>
#include "fsl_rnga_hal.h"
#if FSL_FEATURE_SOC_RNG_COUNT
/*!
* @addtogroup rnga_driver
* @{
*/
/*******************************************************************************
* Definitions
*******************************************************************************/
/*! @brief Table of base addresses for RNGA instances. */
extern RNG_Type * const g_rngaBase[];
/*! @brief Table to save RNGA IRQ enumeration numbers defined in the CMSIS header file. */
extern const IRQn_Type g_rngaIrqId[RNG_INSTANCE_COUNT];
/*!
* @brief Data structure for the RNGA initialization
*
* This structure initializes the RNGA by calling the the rnga_init function.
* It contains all RNGA configurations.
* @internal gui name="Basic configuration" id="rngaCfg"
*/
typedef struct _rnga_user_config
{
bool isIntMasked; /*!< Mask the triggering of error interrupt @internal gui name="Interrupt mask" id="isIntMasked" */
bool highAssuranceEnable; /*!< Enable notification of security violations @internal gui name="High assurance" id="highAssurance" */
} rnga_user_config_t;
/*******************************************************************************
* API
*******************************************************************************/
#if defined(__cplusplus)
extern "C" {
#endif
/*!
* @brief Initializes the RNGA.
*
* This function initializes the RNGA. When called, the RNGA
* runs immediately according to the specifications in the configuration.
*
* @param instance, RNGA instance ID
* @param config, pointer to initialize configuration structure
* @return RNGA status
*/
rnga_status_t RNGA_DRV_Init(uint32_t instance, const rnga_user_config_t *config);
/*!
* @brief Shuts down the RNGA.
*
* This function shuts down the RNGA.
*
* @param instance, RNGA instance ID
*/
void RNGA_DRV_Deinit(uint32_t instance);
/*!
* @brief Sets the RNGA in normal mode or sleep mode.
*
* This function sets the RNGA in sleep mode or normal mode.
*
* @param instance, RNGA instance ID
* @param mode, normal mode or sleep mode
*/
static inline void RNGA_DRV_SetMode(uint32_t instance, rnga_mode_t mode)
{
RNGA_HAL_SetWorkModeCmd(g_rngaBase[instance], mode);
}
/*!
* @brief Gets the RNGA working mode.
*
* This function gets the RNGA working mode.
*
* @param instance, RNGA instance ID
* @return normal mode or sleep mode
*/
static inline rnga_mode_t RNGA_DRV_GetMode(uint32_t instance)
{
return RNGA_HAL_GetWorkMode(g_rngaBase[instance]);
}
/*!
* @brief Gets random data.
*
* This function gets random data from the RNGA.
*
* @param instance, RNGA instance ID
* @param data, pointer address used to store random data
* @return one random data
*/
static inline rnga_status_t RNGA_DRV_GetRandomData(uint32_t instance, uint32_t *data)
{
return RNGA_HAL_GetRandomData(g_rngaBase[instance], data);
}
/*!
* @brief Feeds the RNGA module.
*
* This function inputs an entropy value that the RNGA uses to seed its
* pseudo-random algorithm.
*
* @param instance, RNGA instance ID
* @param seed, input seed value
*/
static inline void RNGA_DRV_Seed(uint32_t instance, uint32_t seed)
{
RNGA_HAL_WriteSeed(g_rngaBase[instance],seed);
}
/*!
* @brief RNGA interrupt handler.
*
* This function handles the error interrupt caused by the RNGA underflow.
*
* @param instance, RNGA instance ID
*/
void RNGA_DRV_IRQHandler(uint32_t instance);
#if defined(__cplusplus)
}
#endif
/*! @}*/
#endif
#endif /* __FSL_RNGA_H__*/
/*******************************************************************************
* EOF
*******************************************************************************/
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