433 lines
14 KiB
C
433 lines
14 KiB
C
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/*
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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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#include "fsl_flexio_spi_edma.h"
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/*******************************************************************************
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* Definitons
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******************************************************************************/
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/*<! Structure definition for spi_edma_private_handle_t. The structure is private. */
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typedef struct _flexio_spi_master_edma_private_handle
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{
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FLEXIO_SPI_Type *base;
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flexio_spi_master_edma_handle_t *handle;
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} flexio_spi_master_edma_private_handle_t;
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*!
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* @brief EDMA callback function for FLEXIO SPI send transfer.
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*
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* @param handle EDMA handle pointer.
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* @param param Callback function parameter.
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*/
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static void FLEXIO_SPI_TxEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
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/*!
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* @brief EDMA callback function for FLEXIO SPI receive transfer.
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*
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* @param handle EDMA handle pointer.
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* @param param Callback function parameter.
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*/
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static void FLEXIO_SPI_RxEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
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/*!
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* @brief EDMA config for FLEXIO SPI transfer.
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*
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* @param base pointer to FLEXIO_SPI_Type structure.
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* @param handle pointer to flexio_spi_master_edma_handle_t structure to store the transfer state.
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* @param xfer Pointer to flexio spi transfer structure.
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*/
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static void FLEXIO_SPI_EDMAConfig(FLEXIO_SPI_Type *base,
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flexio_spi_master_edma_handle_t *handle,
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flexio_spi_transfer_t *xfer);
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/*******************************************************************************
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* Variables
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******************************************************************************/
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/* Dummy data used to send */
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static const uint16_t s_dummyData = FLEXIO_SPI_DUMMYDATA;
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/*< @brief user configurable flexio spi handle count. */
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#define FLEXIO_SPI_HANDLE_COUNT 2
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/*<! Private handle only used for internally. */
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static flexio_spi_master_edma_private_handle_t s_edmaPrivateHandle[FLEXIO_SPI_HANDLE_COUNT];
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/*******************************************************************************
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* Code
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******************************************************************************/
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static void FLEXIO_SPI_TxEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
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{
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tcds = tcds;
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flexio_spi_master_edma_private_handle_t *spiPrivateHandle = (flexio_spi_master_edma_private_handle_t *)param;
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/* Disable Tx DMA */
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if (transferDone)
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{
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FLEXIO_SPI_EnableDMA(spiPrivateHandle->base, kFLEXIO_SPI_TxDmaEnable, false);
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/* change the state */
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spiPrivateHandle->handle->txInProgress = false;
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/* All finished, call the callback */
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if ((spiPrivateHandle->handle->txInProgress == false) && (spiPrivateHandle->handle->rxInProgress == false))
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{
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if (spiPrivateHandle->handle->callback)
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{
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(spiPrivateHandle->handle->callback)(spiPrivateHandle->base, spiPrivateHandle->handle, kStatus_Success,
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spiPrivateHandle->handle->userData);
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}
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}
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}
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}
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static void FLEXIO_SPI_RxEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
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{
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tcds = tcds;
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flexio_spi_master_edma_private_handle_t *spiPrivateHandle = (flexio_spi_master_edma_private_handle_t *)param;
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if (transferDone)
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{
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/* Disable Rx dma */
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FLEXIO_SPI_EnableDMA(spiPrivateHandle->base, kFLEXIO_SPI_RxDmaEnable, false);
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/* change the state */
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spiPrivateHandle->handle->rxInProgress = false;
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/* All finished, call the callback */
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if ((spiPrivateHandle->handle->txInProgress == false) && (spiPrivateHandle->handle->rxInProgress == false))
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{
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if (spiPrivateHandle->handle->callback)
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{
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(spiPrivateHandle->handle->callback)(spiPrivateHandle->base, spiPrivateHandle->handle, kStatus_Success,
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spiPrivateHandle->handle->userData);
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}
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}
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}
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}
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static void FLEXIO_SPI_EDMAConfig(FLEXIO_SPI_Type *base,
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flexio_spi_master_edma_handle_t *handle,
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flexio_spi_transfer_t *xfer)
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{
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edma_transfer_config_t xferConfig;
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flexio_spi_shift_direction_t direction;
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uint8_t bytesPerFrame;
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/* Configure the values in handle. */
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switch (xfer->flags)
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{
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case kFLEXIO_SPI_8bitMsb:
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bytesPerFrame = 1;
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direction = kFLEXIO_SPI_MsbFirst;
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break;
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case kFLEXIO_SPI_8bitLsb:
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bytesPerFrame = 1;
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direction = kFLEXIO_SPI_LsbFirst;
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break;
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case kFLEXIO_SPI_16bitMsb:
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bytesPerFrame = 2;
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direction = kFLEXIO_SPI_MsbFirst;
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break;
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case kFLEXIO_SPI_16bitLsb:
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bytesPerFrame = 2;
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direction = kFLEXIO_SPI_LsbFirst;
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break;
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default:
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bytesPerFrame = 1U;
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direction = kFLEXIO_SPI_MsbFirst;
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assert(true);
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break;
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}
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/* Save total transfer size. */
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handle->transferSize = xfer->dataSize;
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/* Configure tx transfer EDMA. */
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xferConfig.destAddr = FLEXIO_SPI_GetTxDataRegisterAddress(base, direction);
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xferConfig.destOffset = 0;
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if (bytesPerFrame == 1U)
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{
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xferConfig.srcTransferSize = kEDMA_TransferSize1Bytes;
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xferConfig.destTransferSize = kEDMA_TransferSize1Bytes;
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xferConfig.minorLoopBytes = 1;
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}
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else
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{
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if (direction == kFLEXIO_SPI_MsbFirst)
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{
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xferConfig.destAddr -= 1U;
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}
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xferConfig.srcTransferSize = kEDMA_TransferSize2Bytes;
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xferConfig.destTransferSize = kEDMA_TransferSize2Bytes;
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xferConfig.minorLoopBytes = 2;
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}
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/* Configure DMA channel. */
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if (xfer->txData)
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{
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xferConfig.srcOffset = bytesPerFrame;
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xferConfig.srcAddr = (uint32_t)(xfer->txData);
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}
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else
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{
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/* Disable the source increasement and source set to dummyData. */
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xferConfig.srcOffset = 0;
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xferConfig.srcAddr = (uint32_t)(&s_dummyData);
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}
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xferConfig.majorLoopCounts = (xfer->dataSize / xferConfig.minorLoopBytes);
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/* Store the initially configured eDMA minor byte transfer count into the FLEXIO SPI handle */
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handle->nbytes = xferConfig.minorLoopBytes;
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if (handle->txHandle)
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{
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EDMA_SubmitTransfer(handle->txHandle, &xferConfig);
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}
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/* Configure tx transfer EDMA. */
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if (xfer->rxData)
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{
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xferConfig.srcAddr = FLEXIO_SPI_GetRxDataRegisterAddress(base, direction);
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if (bytesPerFrame == 2U)
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{
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if (direction == kFLEXIO_SPI_LsbFirst)
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{
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xferConfig.srcAddr -= 1U;
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}
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}
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xferConfig.srcOffset = 0;
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xferConfig.destAddr = (uint32_t)(xfer->rxData);
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xferConfig.destOffset = bytesPerFrame;
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EDMA_SubmitTransfer(handle->rxHandle, &xferConfig);
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handle->rxInProgress = true;
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FLEXIO_SPI_EnableDMA(base, kFLEXIO_SPI_RxDmaEnable, true);
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EDMA_StartTransfer(handle->rxHandle);
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}
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/* Always start Tx transfer. */
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if (handle->txHandle)
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{
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handle->txInProgress = true;
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FLEXIO_SPI_EnableDMA(base, kFLEXIO_SPI_TxDmaEnable, true);
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EDMA_StartTransfer(handle->txHandle);
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}
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}
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status_t FLEXIO_SPI_MasterTransferCreateHandleEDMA(FLEXIO_SPI_Type *base,
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flexio_spi_master_edma_handle_t *handle,
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flexio_spi_master_edma_transfer_callback_t callback,
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void *userData,
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edma_handle_t *txHandle,
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edma_handle_t *rxHandle)
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{
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assert(handle);
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uint8_t index = 0;
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/* Find the an empty handle pointer to store the handle. */
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for (index = 0; index < FLEXIO_SPI_HANDLE_COUNT; index++)
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{
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if (s_edmaPrivateHandle[index].base == NULL)
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{
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s_edmaPrivateHandle[index].base = base;
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s_edmaPrivateHandle[index].handle = handle;
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break;
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}
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}
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if (index == FLEXIO_SPI_HANDLE_COUNT)
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{
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return kStatus_OutOfRange;
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}
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/* Set spi base to handle. */
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handle->txHandle = txHandle;
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handle->rxHandle = rxHandle;
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/* Register callback and userData. */
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handle->callback = callback;
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handle->userData = userData;
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/* Set SPI state to idle. */
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handle->txInProgress = false;
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handle->rxInProgress = false;
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/* Install callback for Tx/Rx dma channel. */
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if (handle->txHandle)
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{
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EDMA_SetCallback(handle->txHandle, FLEXIO_SPI_TxEDMACallback, &s_edmaPrivateHandle[index]);
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}
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if (handle->rxHandle)
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{
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EDMA_SetCallback(handle->rxHandle, FLEXIO_SPI_RxEDMACallback, &s_edmaPrivateHandle[index]);
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}
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return kStatus_Success;
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}
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status_t FLEXIO_SPI_MasterTransferEDMA(FLEXIO_SPI_Type *base,
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flexio_spi_master_edma_handle_t *handle,
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flexio_spi_transfer_t *xfer)
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{
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assert(handle);
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assert(xfer);
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uint32_t dataMode = 0;
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uint16_t timerCmp = base->flexioBase->TIMCMP[base->timerIndex[0]];
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timerCmp &= 0x00FFU;
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/* Check if the device is busy. */
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if ((handle->txInProgress) || (handle->rxInProgress))
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{
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return kStatus_FLEXIO_SPI_Busy;
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}
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/* Check if input parameter invalid. */
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if (((xfer->txData == NULL) && (xfer->rxData == NULL)) || (xfer->dataSize == 0U))
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{
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return kStatus_InvalidArgument;
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}
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/* configure data mode. */
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if ((xfer->flags == kFLEXIO_SPI_8bitMsb) || (xfer->flags == kFLEXIO_SPI_8bitLsb))
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{
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dataMode = (8 * 2 - 1U) << 8U;
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}
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else if ((xfer->flags == kFLEXIO_SPI_16bitMsb) || (xfer->flags == kFLEXIO_SPI_16bitLsb))
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{
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dataMode = (16 * 2 - 1U) << 8U;
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}
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else
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{
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dataMode = 8 * 2 - 1U;
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}
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dataMode |= timerCmp;
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base->flexioBase->TIMCMP[base->timerIndex[0]] = dataMode;
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FLEXIO_SPI_EDMAConfig(base, handle, xfer);
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return kStatus_Success;
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}
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status_t FLEXIO_SPI_MasterTransferGetCountEDMA(FLEXIO_SPI_Type *base,
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flexio_spi_master_edma_handle_t *handle,
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size_t *count)
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{
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assert(handle);
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if (!count)
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{
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return kStatus_InvalidArgument;
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}
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if (handle->rxInProgress)
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{
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*count = (handle->transferSize -
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(uint32_t)handle->nbytes *
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EDMA_GetRemainingMajorLoopCount(handle->rxHandle->base, handle->rxHandle->channel));
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}
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else
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{
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*count = (handle->transferSize -
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(uint32_t)handle->nbytes *
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EDMA_GetRemainingMajorLoopCount(handle->txHandle->base, handle->txHandle->channel));
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}
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|
|
|
||
|
|
return kStatus_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
void FLEXIO_SPI_MasterTransferAbortEDMA(FLEXIO_SPI_Type *base, flexio_spi_master_edma_handle_t *handle)
|
||
|
|
{
|
||
|
|
assert(handle);
|
||
|
|
|
||
|
|
/* Disable dma. */
|
||
|
|
EDMA_StopTransfer(handle->txHandle);
|
||
|
|
EDMA_StopTransfer(handle->rxHandle);
|
||
|
|
|
||
|
|
/* Disable DMA enable bit. */
|
||
|
|
FLEXIO_SPI_EnableDMA(base, kFLEXIO_SPI_DmaAllEnable, false);
|
||
|
|
|
||
|
|
/* Set the handle state. */
|
||
|
|
handle->txInProgress = false;
|
||
|
|
handle->rxInProgress = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
status_t FLEXIO_SPI_SlaveTransferEDMA(FLEXIO_SPI_Type *base,
|
||
|
|
flexio_spi_slave_edma_handle_t *handle,
|
||
|
|
flexio_spi_transfer_t *xfer)
|
||
|
|
{
|
||
|
|
assert(handle);
|
||
|
|
assert(xfer);
|
||
|
|
|
||
|
|
uint32_t dataMode = 0;
|
||
|
|
|
||
|
|
/* Check if the device is busy. */
|
||
|
|
if ((handle->txInProgress) || (handle->rxInProgress))
|
||
|
|
{
|
||
|
|
return kStatus_FLEXIO_SPI_Busy;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check if input parameter invalid. */
|
||
|
|
if (((xfer->txData == NULL) && (xfer->rxData == NULL)) || (xfer->dataSize == 0U))
|
||
|
|
{
|
||
|
|
return kStatus_InvalidArgument;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* configure data mode. */
|
||
|
|
if ((xfer->flags == kFLEXIO_SPI_8bitMsb) || (xfer->flags == kFLEXIO_SPI_8bitLsb))
|
||
|
|
{
|
||
|
|
dataMode = 8 * 2 - 1U;
|
||
|
|
}
|
||
|
|
else if ((xfer->flags == kFLEXIO_SPI_16bitMsb) || (xfer->flags == kFLEXIO_SPI_16bitLsb))
|
||
|
|
{
|
||
|
|
dataMode = 16 * 2 - 1U;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
dataMode = 8 * 2 - 1U;
|
||
|
|
}
|
||
|
|
|
||
|
|
base->flexioBase->TIMCMP[base->timerIndex[0]] = dataMode;
|
||
|
|
|
||
|
|
FLEXIO_SPI_EDMAConfig(base, handle, xfer);
|
||
|
|
|
||
|
|
return kStatus_Success;
|
||
|
|
}
|