350 lines
12 KiB
C
350 lines
12 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_uart_edma.h"
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/*<! Structure definition for uart_edma_private_handle_t. The structure is private. */
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typedef struct _flexio_uart_edma_private_handle
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{
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FLEXIO_UART_Type *base;
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flexio_uart_edma_handle_t *handle;
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} flexio_uart_edma_private_handle_t;
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/* UART EDMA transfer handle. */
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enum _flexio_uart_edma_tansfer_states
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{
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kFLEXIO_UART_TxIdle, /* TX idle. */
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kFLEXIO_UART_TxBusy, /* TX busy. */
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kFLEXIO_UART_RxIdle, /* RX idle. */
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kFLEXIO_UART_RxBusy /* RX busy. */
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};
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/*< @brief user configurable flexio uart handle count. */
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#define FLEXIO_UART_HANDLE_COUNT 2
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/*<! Private handle only used for internally. */
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static flexio_uart_edma_private_handle_t s_edmaPrivateHandle[FLEXIO_UART_HANDLE_COUNT];
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*!
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* @brief FLEXIO UART EDMA send finished callback function.
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*
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* This function is called when FLEXIO UART EDMA send finished. It disables the UART
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* TX EDMA request and sends @ref kStatus_FLEXIO_UART_TxIdle to FLEXIO UART callback.
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*
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* @param handle The EDMA handle.
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* @param param Callback function parameter.
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*/
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static void FLEXIO_UART_TransferSendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
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/*!
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* @brief FLEXIO UART EDMA receive finished callback function.
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*
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* This function is called when FLEXIO UART EDMA receive finished. It disables the UART
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* RX EDMA request and sends @ref kStatus_FLEXIO_UART_RxIdle to UART callback.
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*
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* @param handle The EDMA handle.
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* @param param Callback function parameter.
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*/
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static void FLEXIO_UART_TransferReceiveEDMACallback(edma_handle_t *handle,
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void *param,
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bool transferDone,
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uint32_t tcds);
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/*******************************************************************************
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* Code
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******************************************************************************/
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static void FLEXIO_UART_TransferSendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
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{
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flexio_uart_edma_private_handle_t *uartPrivateHandle = (flexio_uart_edma_private_handle_t *)param;
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assert(uartPrivateHandle->handle);
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/* Avoid the warning for unused variables. */
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handle = handle;
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tcds = tcds;
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if (transferDone)
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{
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FLEXIO_UART_TransferAbortSendEDMA(uartPrivateHandle->base, uartPrivateHandle->handle);
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if (uartPrivateHandle->handle->callback)
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{
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uartPrivateHandle->handle->callback(uartPrivateHandle->base, uartPrivateHandle->handle,
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kStatus_FLEXIO_UART_TxIdle, uartPrivateHandle->handle->userData);
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}
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}
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}
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static void FLEXIO_UART_TransferReceiveEDMACallback(edma_handle_t *handle,
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void *param,
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bool transferDone,
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uint32_t tcds)
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{
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flexio_uart_edma_private_handle_t *uartPrivateHandle = (flexio_uart_edma_private_handle_t *)param;
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assert(uartPrivateHandle->handle);
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/* Avoid the warning for unused variables. */
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handle = handle;
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tcds = tcds;
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if (transferDone)
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{
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/* Disable transfer. */
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FLEXIO_UART_TransferAbortReceiveEDMA(uartPrivateHandle->base, uartPrivateHandle->handle);
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if (uartPrivateHandle->handle->callback)
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{
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uartPrivateHandle->handle->callback(uartPrivateHandle->base, uartPrivateHandle->handle,
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kStatus_FLEXIO_UART_RxIdle, uartPrivateHandle->handle->userData);
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}
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}
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}
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status_t FLEXIO_UART_TransferCreateHandleEDMA(FLEXIO_UART_Type *base,
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flexio_uart_edma_handle_t *handle,
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flexio_uart_edma_transfer_callback_t callback,
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void *userData,
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edma_handle_t *txEdmaHandle,
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edma_handle_t *rxEdmaHandle)
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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_UART_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_UART_HANDLE_COUNT)
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{
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return kStatus_OutOfRange;
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}
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memset(handle, 0, sizeof(*handle));
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handle->rxState = kFLEXIO_UART_RxIdle;
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handle->txState = kFLEXIO_UART_TxIdle;
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handle->rxEdmaHandle = rxEdmaHandle;
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handle->txEdmaHandle = txEdmaHandle;
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handle->callback = callback;
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handle->userData = userData;
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/* Configure TX. */
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if (txEdmaHandle)
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{
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EDMA_SetCallback(handle->txEdmaHandle, FLEXIO_UART_TransferSendEDMACallback, &s_edmaPrivateHandle);
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}
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/* Configure RX. */
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if (rxEdmaHandle)
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{
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EDMA_SetCallback(handle->rxEdmaHandle, FLEXIO_UART_TransferReceiveEDMACallback, &s_edmaPrivateHandle);
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}
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return kStatus_Success;
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}
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status_t FLEXIO_UART_TransferSendEDMA(FLEXIO_UART_Type *base,
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flexio_uart_edma_handle_t *handle,
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flexio_uart_transfer_t *xfer)
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{
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assert(handle->txEdmaHandle);
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edma_transfer_config_t xferConfig;
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status_t status;
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/* Return error if xfer invalid. */
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if ((0U == xfer->dataSize) || (NULL == xfer->data))
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{
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return kStatus_InvalidArgument;
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}
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/* If previous TX not finished. */
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if (kFLEXIO_UART_TxBusy == handle->txState)
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{
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status = kStatus_FLEXIO_UART_TxBusy;
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}
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else
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{
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handle->txState = kFLEXIO_UART_TxBusy;
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handle->txDataSizeAll = xfer->dataSize;
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/* Prepare transfer. */
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EDMA_PrepareTransfer(&xferConfig, xfer->data, sizeof(uint8_t),
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(void *)FLEXIO_UART_GetTxDataRegisterAddress(base), sizeof(uint8_t), sizeof(uint8_t),
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xfer->dataSize, kEDMA_MemoryToPeripheral);
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/* Store the initially configured eDMA minor byte transfer count into the FLEXIO UART handle */
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handle->nbytes = sizeof(uint8_t);
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/* Submit transfer. */
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EDMA_SubmitTransfer(handle->txEdmaHandle, &xferConfig);
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EDMA_StartTransfer(handle->txEdmaHandle);
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/* Enable UART TX EDMA. */
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FLEXIO_UART_EnableTxDMA(base, true);
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status = kStatus_Success;
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}
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return status;
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}
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status_t FLEXIO_UART_TransferReceiveEDMA(FLEXIO_UART_Type *base,
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flexio_uart_edma_handle_t *handle,
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flexio_uart_transfer_t *xfer)
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{
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assert(handle->rxEdmaHandle);
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edma_transfer_config_t xferConfig;
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status_t status;
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/* Return error if xfer invalid. */
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if ((0U == xfer->dataSize) || (NULL == xfer->data))
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{
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return kStatus_InvalidArgument;
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}
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/* If previous RX not finished. */
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if (kFLEXIO_UART_RxBusy == handle->rxState)
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{
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status = kStatus_FLEXIO_UART_RxBusy;
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}
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else
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{
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handle->rxState = kFLEXIO_UART_RxBusy;
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handle->rxDataSizeAll = xfer->dataSize;
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/* Prepare transfer. */
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EDMA_PrepareTransfer(&xferConfig, (void *)FLEXIO_UART_GetRxDataRegisterAddress(base), sizeof(uint8_t),
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xfer->data, sizeof(uint8_t), sizeof(uint8_t), xfer->dataSize, kEDMA_PeripheralToMemory);
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/* Store the initially configured eDMA minor byte transfer count into the FLEXIO UART handle */
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handle->nbytes = sizeof(uint8_t);
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/* Submit transfer. */
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EDMA_SubmitTransfer(handle->rxEdmaHandle, &xferConfig);
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EDMA_StartTransfer(handle->rxEdmaHandle);
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/* Enable UART RX EDMA. */
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FLEXIO_UART_EnableRxDMA(base, true);
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status = kStatus_Success;
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}
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return status;
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}
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void FLEXIO_UART_TransferAbortSendEDMA(FLEXIO_UART_Type *base, flexio_uart_edma_handle_t *handle)
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{
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assert(handle->txEdmaHandle);
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/* Disable UART TX EDMA. */
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FLEXIO_UART_EnableTxDMA(base, false);
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/* Stop transfer. */
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EDMA_StopTransfer(handle->txEdmaHandle);
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handle->txState = kFLEXIO_UART_TxIdle;
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}
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void FLEXIO_UART_TransferAbortReceiveEDMA(FLEXIO_UART_Type *base, flexio_uart_edma_handle_t *handle)
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{
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assert(handle->rxEdmaHandle);
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/* Disable UART RX EDMA. */
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FLEXIO_UART_EnableRxDMA(base, false);
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/* Stop transfer. */
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EDMA_StopTransfer(handle->rxEdmaHandle);
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handle->rxState = kFLEXIO_UART_RxIdle;
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}
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status_t FLEXIO_UART_TransferGetReceiveCountEDMA(FLEXIO_UART_Type *base,
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flexio_uart_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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assert(handle->rxEdmaHandle);
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assert(count);
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if (kFLEXIO_UART_RxIdle == handle->rxState)
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{
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return kStatus_NoTransferInProgress;
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}
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*count = handle->rxDataSizeAll -
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(uint32_t)handle->nbytes *
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EDMA_GetRemainingMajorLoopCount(handle->rxEdmaHandle->base, handle->rxEdmaHandle->channel);
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return kStatus_Success;
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}
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status_t FLEXIO_UART_TransferGetSendCountEDMA(FLEXIO_UART_Type *base, flexio_uart_edma_handle_t *handle, size_t *count)
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{
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assert(handle);
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assert(handle->txEdmaHandle);
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assert(count);
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if (kFLEXIO_UART_TxIdle == handle->txState)
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{
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return kStatus_NoTransferInProgress;
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}
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*count = handle->txDataSizeAll -
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(uint32_t)handle->nbytes *
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EDMA_GetRemainingMajorLoopCount(handle->txEdmaHandle->base, handle->txEdmaHandle->channel);
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return kStatus_Success;
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}
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