232 lines
9.8 KiB
C
232 lines
9.8 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _FSL_SAI_EDMA_H_
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#define _FSL_SAI_EDMA_H_
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#include "fsl_sai.h"
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#include "fsl_edma.h"
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/*!
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* @addtogroup sai_edma
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* @{
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*/
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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typedef struct _sai_edma_handle sai_edma_handle_t;
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/*! @brief SAI eDMA transfer callback function for finish and error */
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typedef void (*sai_edma_callback_t)(I2S_Type *base, sai_edma_handle_t *handle, status_t status, void *userData);
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/*! @brief SAI DMA transfer handle, users should not touch the content of the handle.*/
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struct _sai_edma_handle
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{
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edma_handle_t *dmaHandle; /*!< DMA handler for SAI send */
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uint8_t nbytes; /*!< eDMA minor byte transfer count initially configured. */
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uint8_t bytesPerFrame; /*!< Bytes in a frame */
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uint8_t channel; /*!< Which data channel */
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uint8_t count; /*!< The transfer data count in a DMA request */
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uint32_t state; /*!< Internal state for SAI eDMA transfer */
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sai_edma_callback_t callback; /*!< Callback for users while transfer finish or error occurs */
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void *userData; /*!< User callback parameter */
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edma_tcd_t tcd[SAI_XFER_QUEUE_SIZE + 1U]; /*!< TCD pool for eDMA transfer. */
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sai_transfer_t saiQueue[SAI_XFER_QUEUE_SIZE]; /*!< Transfer queue storing queued transfer. */
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size_t transferSize[SAI_XFER_QUEUE_SIZE]; /*!< Data bytes need to transfer */
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volatile uint8_t queueUser; /*!< Index for user to queue transfer. */
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volatile uint8_t queueDriver; /*!< Index for driver to get the transfer data and size */
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};
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/*******************************************************************************
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* APIs
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******************************************************************************/
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/*!
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* @name eDMA Transactional
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* @{
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*/
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/*!
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* @brief Initializes the SAI eDMA handle.
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*
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* This function initializes the SAI master DMA handle, which can be used for other SAI master transactional APIs.
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* Usually, for a specified SAI instance, call this API once to get the initialized handle.
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*
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* @param base SAI base pointer.
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* @param handle SAI eDMA handle pointer.
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* @param base SAI peripheral base address.
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* @param callback Pointer to user callback function.
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* @param userData User parameter passed to the callback function.
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* @param dmaHandle eDMA handle pointer, this handle shall be static allocated by users.
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*/
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void SAI_TransferTxCreateHandleEDMA(
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I2S_Type *base, sai_edma_handle_t *handle, sai_edma_callback_t callback, void *userData, edma_handle_t *dmaHandle);
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/*!
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* @brief Initializes the SAI Rx eDMA handle.
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*
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* This function initializes the SAI slave DMA handle, which can be used for other SAI master transactional APIs.
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* Usually, for a specified SAI instance, call this API once to get the initialized handle.
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*
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* @param base SAI base pointer.
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* @param handle SAI eDMA handle pointer.
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* @param base SAI peripheral base address.
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* @param callback Pointer to user callback function.
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* @param userData User parameter passed to the callback function.
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* @param dmaHandle eDMA handle pointer, this handle shall be static allocated by users.
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*/
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void SAI_TransferRxCreateHandleEDMA(
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I2S_Type *base, sai_edma_handle_t *handle, sai_edma_callback_t callback, void *userData, edma_handle_t *dmaHandle);
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/*!
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* @brief Configures the SAI Tx audio format.
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*
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* The audio format can be changed at run-time. This function configures the sample rate and audio data
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* format to be transferred. This function also sets the eDMA parameter according to formatting requirements.
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*
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* @param base SAI base pointer.
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* @param handle SAI eDMA handle pointer.
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* @param format Pointer to SAI audio data format structure.
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* @param mclkSourceClockHz SAI master clock source frequency in Hz.
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* @param bclkSourceClockHz SAI bit clock source frequency in Hz. If bit clock source is master
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* clock, this value should equals to masterClockHz in format.
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* @retval kStatus_Success Audio format set successfully.
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* @retval kStatus_InvalidArgument The input argument is invalid.
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*/
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void SAI_TransferTxSetFormatEDMA(I2S_Type *base,
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sai_edma_handle_t *handle,
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sai_transfer_format_t *format,
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uint32_t mclkSourceClockHz,
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uint32_t bclkSourceClockHz);
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/*!
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* @brief Configures the SAI Rx audio format.
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*
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* The audio format can be changed at run-time. This function configures the sample rate and audio data
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* format to be transferred. This function also sets the eDMA parameter according to formatting requirements.
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*
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* @param base SAI base pointer.
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* @param handle SAI eDMA handle pointer.
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* @param format Pointer to SAI audio data format structure.
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* @param mclkSourceClockHz SAI master clock source frequency in Hz.
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* @param bclkSourceClockHz SAI bit clock source frequency in Hz. If a bit clock source is the master
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* clock, this value should equal to masterClockHz in format.
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* @retval kStatus_Success Audio format set successfully.
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* @retval kStatus_InvalidArgument The input argument is invalid.
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*/
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void SAI_TransferRxSetFormatEDMA(I2S_Type *base,
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sai_edma_handle_t *handle,
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sai_transfer_format_t *format,
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uint32_t mclkSourceClockHz,
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uint32_t bclkSourceClockHz);
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/*!
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* @brief Performs a non-blocking SAI transfer using DMA.
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*
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* @note This interface returns immediately after the transfer initiates. Call
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* SAI_GetTransferStatus to poll the transfer status and check whether the SAI transfer is finished.
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*
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* @param base SAI base pointer.
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* @param handle SAI eDMA handle pointer.
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* @param xfer Pointer to the DMA transfer structure.
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* @retval kStatus_Success Start a SAI eDMA send successfully.
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* @retval kStatus_InvalidArgument The input argument is invalid.
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* @retval kStatus_TxBusy SAI is busy sending data.
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*/
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status_t SAI_TransferSendEDMA(I2S_Type *base, sai_edma_handle_t *handle, sai_transfer_t *xfer);
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/*!
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* @brief Performs a non-blocking SAI receive using eDMA.
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*
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* @note This interface returns immediately after the transfer initiates. Call
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* the SAI_GetReceiveRemainingBytes to poll the transfer status and check whether the SAI transfer is finished.
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*
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* @param base SAI base pointer
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* @param handle SAI eDMA handle pointer.
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* @param xfer Pointer to DMA transfer structure.
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* @retval kStatus_Success Start a SAI eDMA receive successfully.
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* @retval kStatus_InvalidArgument The input argument is invalid.
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* @retval kStatus_RxBusy SAI is busy receiving data.
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*/
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status_t SAI_TransferReceiveEDMA(I2S_Type *base, sai_edma_handle_t *handle, sai_transfer_t *xfer);
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/*!
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* @brief Aborts a SAI transfer using eDMA.
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*
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* @param base SAI base pointer.
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* @param handle SAI eDMA handle pointer.
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*/
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void SAI_TransferAbortSendEDMA(I2S_Type *base, sai_edma_handle_t *handle);
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/*!
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* @brief Aborts a SAI receive using eDMA.
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*
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* @param base SAI base pointer
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* @param handle SAI eDMA handle pointer.
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*/
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void SAI_TransferAbortReceiveEDMA(I2S_Type *base, sai_edma_handle_t *handle);
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/*!
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* @brief Gets byte count sent by SAI.
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*
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* @param base SAI base pointer.
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* @param handle SAI eDMA handle pointer.
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* @param count Bytes count sent by SAI.
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* @retval kStatus_Success Succeed get the transfer count.
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* @retval kStatus_NoTransferInProgress There is no non-blocking transaction in progress.
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*/
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status_t SAI_TransferGetSendCountEDMA(I2S_Type *base, sai_edma_handle_t *handle, size_t *count);
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/*!
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* @brief Gets byte count received by SAI.
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*
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* @param base SAI base pointer
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* @param handle SAI eDMA handle pointer.
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* @param count Bytes count received by SAI.
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* @retval kStatus_Success Succeed get the transfer count.
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* @retval kStatus_NoTransferInProgress There is no non-blocking transaction in progress.
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*/
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status_t SAI_TransferGetReceiveCountEDMA(I2S_Type *base, sai_edma_handle_t *handle, size_t *count);
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/*! @} */
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#if defined(__cplusplus)
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}
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#endif
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/*!
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* @}
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*/
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#endif
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