File content as of revision 172:65be27845400:

/*
 * The Clear BSD License
 * Copyright (c) 2016, Freescale Semiconductor, Inc.
 * All rights reserved.
 *
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted (subject to the limitations in the disclaimer below) 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.
 *
 * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
 * 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_SPDIF_EDMA_H_
#define _FSL_SPDIF_EDMA_H_

#include "fsl_spdif.h"
#include "fsl_edma.h"

/*!
 * @addtogroup spdif_edma
 * @{
 */

/*******************************************************************************
 * Definitions
 ******************************************************************************/

/*! @name Driver version */
/*@{*/
#define FSL_SPDIF_EDMA_DRIVER_VERSION (MAKE_VERSION(2, 0, 0)) /*!< Version 2.0.0 */
/*@}*/

typedef struct _spdif_edma_handle spdif_edma_handle_t;

/*! @brief SPDIF eDMA transfer callback function for finish and error */
typedef void (*spdif_edma_callback_t)(SPDIF_Type *base, spdif_edma_handle_t *handle, status_t status, void *userData);

/*! @brief SPDIF transfer structure */
typedef struct _spdif_edma_transfer
{
    uint8_t *leftData;  /*!< Data start address to transfer. */
    uint8_t *rightData; /*!< Data start address to transfer. */
    size_t dataSize;    /*!< Transfer size. */
} spdif_edma_transfer_t;

/*! @brief SPDIF DMA transfer handle, users should not touch the content of the handle.*/
struct _spdif_edma_handle
{
    edma_handle_t *dmaLeftHandle;                    /*!< DMA handler for SPDIF left channel */
    edma_handle_t *dmaRightHandle;                   /*!< DMA handler for SPDIF right channel */
    uint8_t nbytes;                                  /*!< eDMA minor byte transfer count initially configured. */
    uint8_t count;                                   /*!< The transfer data count in a DMA request */
    uint32_t state;                                  /*!< Internal state for SPDIF eDMA transfer */
    spdif_edma_callback_t callback;                  /*!< Callback for users while transfer finish or error occurs */
    void *userData;                                  /*!< User callback parameter */
    edma_tcd_t leftTcd[SPDIF_XFER_QUEUE_SIZE + 1U];  /*!< TCD pool for eDMA transfer. */
    edma_tcd_t rightTcd[SPDIF_XFER_QUEUE_SIZE + 1U]; /*!< TCD pool for eDMA transfer. */
    spdif_edma_transfer_t spdifQueue[SPDIF_XFER_QUEUE_SIZE]; /*!< Transfer queue storing queued transfer. */
    size_t transferSize[SPDIF_XFER_QUEUE_SIZE]; /*!< Data bytes need to transfer, left and right are the same, so use
                                                   one */
    volatile uint8_t queueUser;                 /*!< Index for user to queue transfer. */
    volatile uint8_t queueDriver;               /*!< Index for driver to get the transfer data and size */
};

/*******************************************************************************
 * APIs
 ******************************************************************************/
#if defined(__cplusplus)
extern "C" {
#endif

/*!
 * @name eDMA Transactional
 * @{
 */

/*!
 * @brief Initializes the SPDIF eDMA handle.
 *
 * This function initializes the SPDIF master DMA handle, which can be used for other SPDIF master transactional APIs.
 * Usually, for a specified SPDIF instance, call this API once to get the initialized handle.
 *
 * @param base SPDIF base pointer.
 * @param handle SPDIF eDMA handle pointer.
 * @param base SPDIF peripheral base address.
 * @param callback Pointer to user callback function.
 * @param userData User parameter passed to the callback function.
 * @param dmaLeftHandle eDMA handle pointer for left channel, this handle shall be static allocated by users.
 * @param dmaRightHandle eDMA handle pointer for right channel, this handle shall be static allocated by users.
 */
void SPDIF_TransferTxCreateHandleEDMA(SPDIF_Type *base,
                                      spdif_edma_handle_t *handle,
                                      spdif_edma_callback_t callback,
                                      void *userData,
                                      edma_handle_t *dmaLeftHandle,
                                      edma_handle_t *dmaRightHandle);

/*!
 * @brief Initializes the SPDIF Rx eDMA handle.
 *
 * This function initializes the SPDIF slave DMA handle, which can be used for other SPDIF master transactional APIs.
 * Usually, for a specified SPDIF instance, call this API once to get the initialized handle.
 *
 * @param base SPDIF base pointer.
 * @param handle SPDIF eDMA handle pointer.
 * @param base SPDIF peripheral base address.
 * @param callback Pointer to user callback function.
 * @param userData User parameter passed to the callback function.
 * @param dmaLeftHandle eDMA handle pointer for left channel, this handle shall be static allocated by users.
 * @param dmaRightHandle eDMA handle pointer for right channel, this handle shall be static allocated by users.
 */
void SPDIF_TransferRxCreateHandleEDMA(SPDIF_Type *base,
                                      spdif_edma_handle_t *handle,
                                      spdif_edma_callback_t callback,
                                      void *userData,
                                      edma_handle_t *dmaLeftHandle,
                                      edma_handle_t *dmaRightHandle);

/*!
 * @brief Performs a non-blocking SPDIF transfer using DMA.
 *
 * @note This interface returns immediately after the transfer initiates. Call
 * SPDIF_GetTransferStatus to poll the transfer status and check whether the SPDIF transfer is finished.
 *
 * @param base SPDIF base pointer.
 * @param handle SPDIF eDMA handle pointer.
 * @param xfer Pointer to the DMA transfer structure.
 * @retval kStatus_Success Start a SPDIF eDMA send successfully.
 * @retval kStatus_InvalidArgument The input argument is invalid.
 * @retval kStatus_TxBusy SPDIF is busy sending data.
 */
status_t SPDIF_TransferSendEDMA(SPDIF_Type *base, spdif_edma_handle_t *handle, spdif_edma_transfer_t *xfer);

/*!
 * @brief Performs a non-blocking SPDIF receive using eDMA.
 *
 * @note This interface returns immediately after the transfer initiates. Call
 * the SPDIF_GetReceiveRemainingBytes to poll the transfer status and check whether the SPDIF transfer is finished.
 *
 * @param base SPDIF base pointer
 * @param handle SPDIF eDMA handle pointer.
 * @param xfer Pointer to DMA transfer structure.
 * @retval kStatus_Success Start a SPDIF eDMA receive successfully.
 * @retval kStatus_InvalidArgument The input argument is invalid.
 * @retval kStatus_RxBusy SPDIF is busy receiving data.
 */
status_t SPDIF_TransferReceiveEDMA(SPDIF_Type *base, spdif_edma_handle_t *handle, spdif_edma_transfer_t *xfer);

/*!
 * @brief Aborts a SPDIF transfer using eDMA.
 *
 * @param base SPDIF base pointer.
 * @param handle SPDIF eDMA handle pointer.
 */
void SPDIF_TransferAbortSendEDMA(SPDIF_Type *base, spdif_edma_handle_t *handle);

/*!
 * @brief Aborts a SPDIF receive using eDMA.
 *
 * @param base SPDIF base pointer
 * @param handle SPDIF eDMA handle pointer.
 */
void SPDIF_TransferAbortReceiveEDMA(SPDIF_Type *base, spdif_edma_handle_t *handle);

/*!
 * @brief Gets byte count sent by SPDIF.
 *
 * @param base SPDIF base pointer.
 * @param handle SPDIF eDMA handle pointer.
 * @param count Bytes count sent by SPDIF.
 * @retval kStatus_Success Succeed get the transfer count.
 * @retval kStatus_NoTransferInProgress There is no non-blocking transaction in progress.
 */
status_t SPDIF_TransferGetSendCountEDMA(SPDIF_Type *base, spdif_edma_handle_t *handle, size_t *count);

/*!
 * @brief Gets byte count received by SPDIF.
 *
 * @param base SPDIF base pointer
 * @param handle SPDIF eDMA handle pointer.
 * @param count Bytes count received by SPDIF.
 * @retval kStatus_Success Succeed get the transfer count.
 * @retval kStatus_NoTransferInProgress There is no non-blocking transaction in progress.
 */
status_t SPDIF_TransferGetReceiveCountEDMA(SPDIF_Type *base, spdif_edma_handle_t *handle, size_t *count);

/*! @} */

#if defined(__cplusplus)
}
#endif

/*!
 * @}
 */
#endif