/**
  ******************************************************************************
  * @file    stm32l5xx_hal_dma_ex.c
  * @author  MCD Application Team
  * @brief   DMA Extension HAL module driver
  *         This file provides firmware functions to manage the following
  *         functionalities of the DMA Extension peripheral:
  *           + Extended features functions
  *
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2019 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  @verbatim
  ==============================================================================
                        ##### How to use this driver #####
  ==============================================================================
  [..]
  The DMA Extension HAL driver can be used as follows:

   (+) Configure the DMA_MUX Synchronization Block using HAL_DMAEx_ConfigMuxSync function.
   (+) Configure the DMA_MUX Request Generator Block using HAL_DMAEx_ConfigMuxRequestGenerator function.
       Functions HAL_DMAEx_EnableMuxRequestGenerator and HAL_DMAEx_DisableMuxRequestGenerator can then be used
       to respectively enable/disable the request generator.

   (+) To handle the DMAMUX Interrupts, the function  HAL_DMAEx_MUX_IRQHandler should be called from
       the DMAMUX IRQ handler i.e DMAMUX1_OVR_IRQHandler.
       As only one interrupt line is available for all DMAMUX channels and request generators , HAL_DMAEx_MUX_IRQHandler should be
       called with, as parameter, the appropriate DMA handle as many as used DMAs in the user project
      (exception done if a given DMA is not using the DMAMUX SYNC block neither a request generator)

     -@-  In Memory-to-Memory transfer mode, Multi (Double) Buffer mode is not allowed.
     -@-  When Multi (Double) Buffer mode is enabled, the transfer is circular by default.
     -@-  In Multi (Double) buffer mode, it is possible to update the base address for
          the AHB memory port on the fly (DMA_CM0ARx or DMA_CM1ARx) when the channel is enabled.


  @endverbatim
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32l5xx_hal.h"

/** @addtogroup STM32L5xx_HAL_Driver
  * @{
  */

/** @defgroup DMAEx DMAEx
  * @brief DMA Extended HAL module driver
  * @{
  */

#ifdef HAL_DMA_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private Constants ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @addtogroup DMAEx_Private_Functions
  * @{
  */

static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength);

/**
  * @}
  */


/* Private functions ---------------------------------------------------------*/


/** @defgroup DMAEx_Exported_Functions DMAEx Exported Functions
  * @{
  */

/** @defgroup DMAEx_Exported_Functions_Group1 DMAEx Extended features functions
 *  @brief   Extended features functions
 *
@verbatim
 ===============================================================================
                #####  Extended features functions  #####
 ===============================================================================
    [..]  This section provides functions allowing to:

    (+) Configure the DMAMUX Synchronization Block using HAL_DMAEx_ConfigMuxSync function.
    (+) Configure the DMAMUX Request Generator Block using HAL_DMAEx_ConfigMuxRequestGenerator function.
       Functions HAL_DMAEx_EnableMuxRequestGenerator and HAL_DMAEx_DisableMuxRequestGenerator can then be used
       to respectively enable/disable the request generator.

@endverbatim
  * @{
  */

/**
  * @brief  Starts the multi_buffer DMA Transfer.
  * @note   The multi_buffer transfer operates in circular transfer only.
  * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  *              the configuration information for the specified DMA channel.
  * @param  SrcAddress: The source memory Buffer address
  * @param  DstAddress: The destination memory Buffer address
  * @param  SecondMemAddress: The second memory Buffer address in case of multi buffer Transfer
  * @param  DataLength: The length of data to be transferred from source to destination
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DMAEx_MultiBufferStart(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t SecondMemAddress, uint32_t DataLength)
{
  HAL_StatusTypeDef status = HAL_OK;

  /* Check the parameters */
  assert_param(IS_DMA_BUFFER_SIZE(DataLength));

  /* Memory-to-memory transfer not supported in double buffering mode */
  if (hdma->Init.Direction == DMA_MEMORY_TO_MEMORY)
  {
    hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
    status = HAL_ERROR;
  }
  else
  {
    /* Process Locked */
    __HAL_LOCK(hdma);

    if(hdma->State ==  HAL_DMA_STATE_READY)
    {
      /* Change DMA peripheral state */
      hdma->State = HAL_DMA_STATE_BUSY;

      /* Initialize the error code */
      hdma->ErrorCode = HAL_DMA_ERROR_NONE;

      /* Enable the double buffer mode */
      hdma->Instance->CCR |= (uint32_t) (DMA_CCR_DBM | DMA_CCR_CIRC);

      /* Configure DMA channel destination address */
      hdma->Instance->CM1AR = SecondMemAddress;

      /* Configure the source, destination address and the data length */
      DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);

      /* Clear all flags */
      hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << (hdma->ChannelIndex & 0x1CU));

      /* Clear the DMAMUX synchro overrun flag */
      hdma->DMAmuxChannelStatus->CFR = hdma->DMAmuxChannelStatusMask;

      if(hdma->DMAmuxRequestGen != 0U)
      {
        /* Clear the DMAMUX request generator overrun flag */
        hdma->DMAmuxRequestGenStatus->RGCFR = hdma->DMAmuxRequestGenStatusMask;
      }

      /* Enable the peripheral */
      __HAL_DMA_ENABLE(hdma);
    }
    else
    {
      /* Process Unlocked */
      __HAL_UNLOCK(hdma);
      status = HAL_BUSY;
    }
  }
  return status;
}

/**
  * @brief  Starts the multi_buffer DMA Transfer with interrupt enabled.
  * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  *              the configuration information for the specified DMA Channel.
  * @param  SrcAddress: The source memory Buffer address
  * @param  DstAddress: The destination memory Buffer address
  * @param  SecondMemAddress: The second memory Buffer address in case of multi buffer Transfer
  * @param  DataLength: The length of data to be transferred from source to destination
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DMAEx_MultiBufferStart_IT(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t SecondMemAddress, uint32_t DataLength)
{
  HAL_StatusTypeDef status = HAL_OK;

  /* Check the parameters */
  assert_param(IS_DMA_BUFFER_SIZE(DataLength));

  /* Memory-to-memory transfer not supported in double buffering mode */
  /* double buffering mode not supported for BDMA (D3 DMA)            */
  if(hdma->Init.Direction == DMA_MEMORY_TO_MEMORY)
  {
    hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
    return HAL_ERROR;
  }

  /* Process locked */
  __HAL_LOCK(hdma);

  if(hdma->State == HAL_DMA_STATE_READY)
  {
    /* Change DMA peripheral state */
    hdma->State = HAL_DMA_STATE_BUSY;

    /* Initialize the error code */
    hdma->ErrorCode = HAL_DMA_ERROR_NONE;

   /* Disable the peripheral */
    __HAL_DMA_DISABLE(hdma);

    /* Enable the double buffer mode */
    /* Circular mode has to be Enable when double buffer mode is used */
    hdma->Instance->CCR |= (uint32_t) (DMA_CCR_DBM | DMA_CCR_CIRC);

    /* Configure DMA channel destination address */
    hdma->Instance->CM1AR = SecondMemAddress;

    /* Configure the source, destination address and the data length */
    DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);

    /* Clear all flags */
    hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << (hdma->ChannelIndex & 0x1CU));

    /* Clear the DMAMUX synchro overrun flag */
    hdma->DMAmuxChannelStatus->CFR = hdma->DMAmuxChannelStatusMask;

    if(hdma->DMAmuxRequestGen != 0U)
    {
      /* Clear the DMAMUX request generator overrun flag */
      hdma->DMAmuxRequestGenStatus->RGCFR = hdma->DMAmuxRequestGenStatusMask;
    }

    /* Enable common interrupts */
    if(NULL != hdma->XferHalfCpltCallback )
    {
      /* Enable the Half transfer complete interrupt as well */
      __HAL_DMA_ENABLE_IT(hdma, (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE));
    }
    else
    {
      __HAL_DMA_DISABLE_IT(hdma, DMA_IT_HT);
      __HAL_DMA_ENABLE_IT(hdma, (DMA_IT_TC | DMA_IT_TE));
    }

    /* Check if DMAMUX Synchronization is enabled*/
    if((hdma->DMAmuxChannel->CCR & DMAMUX_CxCR_SE) != 0U)
    {
      /* Enable DMAMUX sync overrun IT*/
      hdma->DMAmuxChannel->CCR |= DMAMUX_CxCR_SOIE;
    }

    if(hdma->DMAmuxRequestGen != 0U)
    {
      /* if using DMAMUX request generator, enable the DMAMUX request generator overrun IT*/
      /* enable the request gen overrun IT*/
      hdma->DMAmuxRequestGen->RGCR |= DMAMUX_RGxCR_OIE;
    }

    /* Enable the peripheral */
    __HAL_DMA_ENABLE(hdma);
  }
  else
  {
    /* Process Unlocked */
    __HAL_UNLOCK(hdma);

    /* Remain BUSY */
    status = HAL_BUSY;
  }
  return status;
}

/**
  * @brief  Change the memory0 or memory1 address on the fly.
  * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  *              the configuration information for the specified DMA Channel.
  * @param  Address:    The new address
  * @param  memory:     the memory to be changed, This parameter can be one of
  *                     the following values:
  *                      MEMORY0 /
  *                      MEMORY1
  * @note   The MEMORY0 address can be changed only when the current transfer use
  *         MEMORY1 and the MEMORY1 address can be changed only when the current
  *         transfer use MEMORY0.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DMAEx_ChangeMemory(DMA_HandleTypeDef *hdma, uint32_t Address, HAL_DMA_MemoryTypeDef memory)
{
  if(memory == MEMORY0)
  {
    /* change the memory0 address */
    hdma->Instance->CM0AR = Address;
  }
  else
  {
    /* change the memory1 address */
    hdma->Instance->CM1AR = Address;
  }

  return HAL_OK;
}

/**
  * @brief  Configure the DMAMUX synchronization parameters for a given DMA channel (instance).
  * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  *              the configuration information for the specified DMA channel.
  * @param  pSyncConfig : pointer to HAL_DMA_MuxSyncConfigTypeDef : contains the DMAMUX synchronization parameters
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DMAEx_ConfigMuxSync(DMA_HandleTypeDef *hdma, HAL_DMA_MuxSyncConfigTypeDef *pSyncConfig)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));

  assert_param(IS_DMAMUX_SYNC_SIGNAL_ID(pSyncConfig->SyncSignalID));

  assert_param(IS_DMAMUX_SYNC_POLARITY(pSyncConfig-> SyncPolarity));
  assert_param(IS_DMAMUX_SYNC_STATE(pSyncConfig->SyncEnable));
  assert_param(IS_DMAMUX_SYNC_EVENT(pSyncConfig->EventEnable));
  assert_param(IS_DMAMUX_SYNC_REQUEST_NUMBER(pSyncConfig->RequestNumber));

  /*Check if the DMA state is ready */
  if(hdma->State == HAL_DMA_STATE_READY)
  {
    /* Process Locked */
    __HAL_LOCK(hdma);

    /* Set the new synchronization parameters (and keep the request ID filled during the Init)*/
    MODIFY_REG( hdma->DMAmuxChannel->CCR, \
               (~DMAMUX_CxCR_DMAREQ_ID) , \
               ((pSyncConfig->SyncSignalID) << DMAMUX_CxCR_SYNC_ID_Pos) | ((pSyncConfig->RequestNumber - 1U) << DMAMUX_CxCR_NBREQ_Pos) | \
               pSyncConfig->SyncPolarity | ((uint32_t)pSyncConfig->SyncEnable << DMAMUX_CxCR_SE_Pos) | \
                 ((uint32_t)pSyncConfig->EventEnable << DMAMUX_CxCR_EGE_Pos));

    /* Process UnLocked */
    __HAL_UNLOCK(hdma);

    return HAL_OK;
  }
  else
  {
    /*DMA State not Ready*/
    return HAL_ERROR;
  }
}

/**
  * @brief  Configure the DMAMUX request generator block used by the given DMA channel (instance).
  * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  *              the configuration information for the specified DMA channel.
  * @param  pRequestGeneratorConfig : pointer to HAL_DMA_MuxRequestGeneratorConfigTypeDef :
  *         contains the request generator parameters.
  *
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DMAEx_ConfigMuxRequestGenerator (DMA_HandleTypeDef *hdma, HAL_DMA_MuxRequestGeneratorConfigTypeDef *pRequestGeneratorConfig)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));

  assert_param(IS_DMAMUX_REQUEST_GEN_SIGNAL_ID(pRequestGeneratorConfig->SignalID));

  assert_param(IS_DMAMUX_REQUEST_GEN_POLARITY(pRequestGeneratorConfig->Polarity));
  assert_param(IS_DMAMUX_REQUEST_GEN_REQUEST_NUMBER(pRequestGeneratorConfig->RequestNumber));

  /* check if the DMA state is ready
     and DMA is using a DMAMUX request generator block
  */
  if((hdma->State == HAL_DMA_STATE_READY) && (hdma->DMAmuxRequestGen != 0U))
  {
    /* Process Locked */
    __HAL_LOCK(hdma);

    /* Set the request generator new parameters */
    hdma->DMAmuxRequestGen->RGCR = pRequestGeneratorConfig->SignalID | \
                                  ((pRequestGeneratorConfig->RequestNumber - 1U) << DMAMUX_RGxCR_GNBREQ_Pos)| \
                                  pRequestGeneratorConfig->Polarity;
   /* Process UnLocked */
   __HAL_UNLOCK(hdma);

   return HAL_OK;
 }
 else
 {
   return HAL_ERROR;
 }
}

/**
  * @brief  Enable the DMAMUX request generator block used by the given DMA channel (instance).
  * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  *              the configuration information for the specified DMA channel.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DMAEx_EnableMuxRequestGenerator (DMA_HandleTypeDef *hdma)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));

  /* check if the DMA state is ready
     and DMA is using a DMAMUX request generator block
  */
  if((hdma->State != HAL_DMA_STATE_RESET) && (hdma->DMAmuxRequestGen != 0))
  {

    /* Enable the request generator*/
    hdma->DMAmuxRequestGen->RGCR |= DMAMUX_RGxCR_GE;

   return HAL_OK;
 }
 else
 {
   return HAL_ERROR;
 }
}

/**
  * @brief  Disable the DMAMUX request generator block used by the given DMA channel (instance).
  * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  *              the configuration information for the specified DMA channel.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DMAEx_DisableMuxRequestGenerator (DMA_HandleTypeDef *hdma)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));

  /* check if the DMA state is ready
     and DMA is using a DMAMUX request generator block
  */
  if((hdma->State != HAL_DMA_STATE_RESET) && (hdma->DMAmuxRequestGen != 0))
  {

    /* Disable the request generator*/
    hdma->DMAmuxRequestGen->RGCR &= ~DMAMUX_RGxCR_GE;

    return HAL_OK;
  }
  else
  {
    return HAL_ERROR;
  }
}

/**
  * @brief  Handles DMAMUX interrupt request.
  * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  *              the configuration information for the specified DMA channel.
  * @retval None
  */
void HAL_DMAEx_MUX_IRQHandler(DMA_HandleTypeDef *hdma)
{
  /* Check for DMAMUX Synchronization overrun */
  if((hdma->DMAmuxChannelStatus->CSR & hdma->DMAmuxChannelStatusMask) != 0U)
  {
    /* Disable the synchro overrun interrupt */
    hdma->DMAmuxChannel->CCR &= ~DMAMUX_CxCR_SOIE;

    /* Clear the DMAMUX synchro overrun flag */
    hdma->DMAmuxChannelStatus->CFR = hdma->DMAmuxChannelStatusMask;

    /* Update error code */
    hdma->ErrorCode |= HAL_DMA_ERROR_SYNC;

    if(hdma->XferErrorCallback != NULL)
    {
      /* Transfer error callback */
      hdma->XferErrorCallback(hdma);
    }
  }

  if(hdma->DMAmuxRequestGen != 0)
  {
   /* if using a DMAMUX request generator block Check for DMAMUX request generator overrun */
    if((hdma->DMAmuxRequestGenStatus->RGSR & hdma->DMAmuxRequestGenStatusMask) != 0U)
    {
      /* Disable the request gen overrun interrupt */
      hdma->DMAmuxRequestGen->RGCR &= ~DMAMUX_RGxCR_OIE;

      /* Clear the DMAMUX request generator overrun flag */
      hdma->DMAmuxRequestGenStatus->RGCFR = hdma->DMAmuxRequestGenStatusMask;

      /* Update error code */
      hdma->ErrorCode |= HAL_DMA_ERROR_REQGEN;

      if(hdma->XferErrorCallback != NULL)
      {
        /* Transfer error callback */
        hdma->XferErrorCallback(hdma);
      }
    }
  }
}

/**
  * @}
  */

/**
  * @}
  */

/** @addtogroup DMAEx_Private_Functions
  * @{
  */

/**
  * @brief  Set the DMA Transfer parameter.
  * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  *              the configuration information for the specified DMA channel.
  * @param  SrcAddress: The source memory Buffer address
  * @param  DstAddress: The destination memory Buffer address
  * @param  DataLength: The length of data to be transferred from source to destination
  * @retval HAL status
  */
static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
{
  /* Configure DMA channel data length */
  hdma->Instance->CNDTR = DataLength;

  /* Memory to Peripheral */
  if((hdma->Init.Direction) == DMA_MEMORY_TO_PERIPH)
  {
    /* Configure DMA channel destination address */
    hdma->Instance->CPAR = DstAddress;

    /* Configure DMA channel source address */
    hdma->Instance->CM0AR = SrcAddress;
  }
  /* Peripheral to Memory */
  else
  {
    /* Configure DMA channel source address */
    hdma->Instance->CPAR = SrcAddress;

    /* Configure DMA channel destination address */
    hdma->Instance->CM0AR = DstAddress;
  }
}

/**
  * @}
  */

#endif /* HAL_DMA_MODULE_ENABLED */

/**
  * @}
  */

/**
  * @}
  */