| /* |
| * Copyright (c) 2016, Freescale Semiconductor, Inc. |
| * Copyright 2016-2017 NXP |
| * All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| #ifndef _FSL_I2S_DMA_H_ |
| #define _FSL_I2S_DMA_H_ |
| |
| #include "fsl_device_registers.h" |
| #include "fsl_common.h" |
| #include "fsl_flexcomm.h" |
| |
| #include "fsl_dma.h" |
| #include "fsl_i2s.h" |
| |
| /******************************************************************************* |
| * Definitions |
| ******************************************************************************/ |
| |
| /*! |
| * @addtogroup i2s_dma_driver |
| * @{ |
| */ |
| |
| /*! @name Driver version */ |
| /*@{*/ |
| /*! @brief I2S DMA driver version 2.0.1. */ |
| #define FSL_I2S_DMA_DRIVER_VERSION (MAKE_VERSION(2, 0, 1)) |
| /*@}*/ |
| |
| /*! @brief Members not to be accessed / modified outside of the driver. */ |
| typedef struct _i2s_dma_handle i2s_dma_handle_t; |
| |
| /*! |
| * @brief Callback function invoked from DMA API on completion. |
| * |
| * @param base I2S base pointer. |
| * @param handle pointer to I2S transaction. |
| * @param completionStatus status of the transaction. |
| * @param userData optional pointer to user arguments data. |
| */ |
| typedef void (*i2s_dma_transfer_callback_t)(I2S_Type *base, |
| i2s_dma_handle_t *handle, |
| status_t completionStatus, |
| void *userData); |
| |
| struct _i2s_dma_handle |
| { |
| uint32_t state; /*!< Internal state of I2S DMA transfer */ |
| i2s_dma_transfer_callback_t completionCallback; /*!< Callback function pointer */ |
| void *userData; /*!< Application data passed to callback */ |
| dma_handle_t *dmaHandle; /*!< DMA handle */ |
| volatile i2s_transfer_t i2sQueue[I2S_NUM_BUFFERS]; /*!< Transfer queue storing transfer buffers */ |
| volatile uint8_t queueUser; /*!< Queue index where user's next transfer will be stored */ |
| volatile uint8_t queueDriver; /*!< Queue index of buffer actually used by the driver */ |
| }; |
| |
| /******************************************************************************* |
| * API |
| ******************************************************************************/ |
| |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif |
| |
| /*! |
| * @name Initialization and deinitialization |
| * @{ |
| */ |
| |
| /*! @} */ |
| |
| /*! |
| * @name DMA API |
| * @{ |
| */ |
| |
| /*! |
| * @brief Initializes handle for transfer of audio data. |
| * |
| * @param base I2S base pointer. |
| * @param handle pointer to handle structure. |
| * @param dmaHandle pointer to dma handle structure. |
| * @param callback function to be called back when transfer is done or fails. |
| * @param userData pointer to data passed to callback. |
| */ |
| void I2S_TxTransferCreateHandleDMA(I2S_Type *base, |
| i2s_dma_handle_t *handle, |
| dma_handle_t *dmaHandle, |
| i2s_dma_transfer_callback_t callback, |
| void *userData); |
| |
| /*! |
| * @brief Begins or queue sending of the given data. |
| * |
| * @param base I2S base pointer. |
| * @param handle pointer to handle structure. |
| * @param transfer data buffer. |
| * |
| * @retval kStatus_Success |
| * @retval kStatus_I2S_Busy if all queue slots are occupied with unsent buffers. |
| */ |
| status_t I2S_TxTransferSendDMA(I2S_Type *base, i2s_dma_handle_t *handle, i2s_transfer_t transfer); |
| |
| /*! |
| * @brief Aborts transfer of data. |
| * |
| * @param base I2S base pointer. |
| * @param handle pointer to handle structure. |
| */ |
| void I2S_TransferAbortDMA(I2S_Type *base, i2s_dma_handle_t *handle); |
| |
| /*! |
| * @brief Initializes handle for reception of audio data. |
| * |
| * @param base I2S base pointer. |
| * @param handle pointer to handle structure. |
| * @param dmaHandle pointer to dma handle structure. |
| * @param callback function to be called back when transfer is done or fails. |
| * @param userData pointer to data passed to callback. |
| */ |
| void I2S_RxTransferCreateHandleDMA(I2S_Type *base, |
| i2s_dma_handle_t *handle, |
| dma_handle_t *dmaHandle, |
| i2s_dma_transfer_callback_t callback, |
| void *userData); |
| |
| /*! |
| * @brief Begins or queue reception of data into given buffer. |
| * |
| * @param base I2S base pointer. |
| * @param handle pointer to handle structure. |
| * @param transfer data buffer. |
| * |
| * @retval kStatus_Success |
| * @retval kStatus_I2S_Busy if all queue slots are occupied with buffers |
| * which are not full. |
| */ |
| status_t I2S_RxTransferReceiveDMA(I2S_Type *base, i2s_dma_handle_t *handle, i2s_transfer_t transfer); |
| |
| /*! |
| * @brief Invoked from DMA interrupt handler. |
| * |
| * @param handle pointer to DMA handle structure. |
| * @param userData argument for user callback. |
| * @param transferDone if transfer was done. |
| * @param tcds |
| */ |
| void I2S_DMACallback(dma_handle_t *handle, void *userData, bool transferDone, uint32_t tcds); |
| |
| /*! @} */ |
| |
| /*! @} */ |
| |
| #if defined(__cplusplus) |
| } |
| #endif |
| |
| #endif /* _FSL_I2S_DMA_H_ */ |