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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.
*/
#include "fsl_rnga_driver.h"
#include "fsl_interrupt_manager.h"
#include "fsl_clock_manager.h"
#if FSL_FEATURE_SOC_RNG_COUNT
/*******************************************************************************
* Definitions
*******************************************************************************/
/*******************************************************************************
* Code
******************************************************************************/
/*FUNCTION*********************************************************************
*
* Function Name: RNGA_DRV_Init
* Description: This function is used to initialize the RNGA
*
*END*************************************************************************/
rnga_status_t RNGA_DRV_Init(uint32_t instance, const rnga_user_config_t *config)
{
assert(instance < RNG_INSTANCE_COUNT);
RNG_Type * base = g_rngaBase[instance];
bool mEnable;
if (!config)
{
return kStatus_RNGA_InvalidArgument;
}
/* Enable the clock gate from clock manager. */
mEnable = CLOCK_SYS_GetRngaGateCmd(instance);
if (!mEnable)
{
CLOCK_SYS_EnableRngaClock(instance);
}
/* Reset the registers for RNGA module to reset state. */
RNGA_HAL_Init(base);
RNGA_HAL_SetIntMaskCmd(base, config->isIntMasked);
RNGA_HAL_SetHighAssuranceCmd(base, config->highAssuranceEnable);
RNGA_HAL_Enable(base);
return kStatus_RNGA_Success;
}
/*FUNCTION*********************************************************************
*
* Function Name: RNGA_DRV_Deinit
* Description: This function is used to shut down the RNGA.
*
*END*************************************************************************/
void RNGA_DRV_Deinit(uint32_t instance)
{
assert(instance < RNG_INSTANCE_COUNT);
RNG_Type * base = g_rngaBase[instance];
RNGA_HAL_Disable(base);
CLOCK_SYS_DisableRngaClock(instance);
}
/*FUNCTION*********************************************************************
*
* Function Name: RNGA_DRV_IRQHandler
* Description: This function is used to handle error interrupt caused by RNGA underflow.
*
*END*************************************************************************/
void RNGA_DRV_IRQHandler(uint32_t instance)
{
assert(instance < RNG_INSTANCE_COUNT);
RNG_Type * base = g_rngaBase[instance];
RNGA_HAL_ClearIntFlag(base, true);
RNGA_HAL_GetOutputRegUnderflowCmd(base);
RNGA_HAL_GetLastReadStatusCmd(base);
}
#endif
/*******************************************************************************
* EOF
*******************************************************************************/
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