| /* |
| * Copyright (c) 2015, Freescale Semiconductor, Inc. |
| * Copyright 2016-2017 NXP |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted 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 the copyright holder nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * 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. |
| */ |
| |
| #include "fsl_flexio_uart_edma.h" |
| |
| /******************************************************************************* |
| * Definitions |
| ******************************************************************************/ |
| |
| /*<! Structure definition for uart_edma_private_handle_t. The structure is private. */ |
| typedef struct _flexio_uart_edma_private_handle |
| { |
| FLEXIO_UART_Type *base; |
| flexio_uart_edma_handle_t *handle; |
| } flexio_uart_edma_private_handle_t; |
| |
| /* UART EDMA transfer handle. */ |
| enum _flexio_uart_edma_tansfer_states |
| { |
| kFLEXIO_UART_TxIdle, /* TX idle. */ |
| kFLEXIO_UART_TxBusy, /* TX busy. */ |
| kFLEXIO_UART_RxIdle, /* RX idle. */ |
| kFLEXIO_UART_RxBusy /* RX busy. */ |
| }; |
| |
| /******************************************************************************* |
| * Definitions |
| ******************************************************************************/ |
| /*< @brief user configurable flexio uart handle count. */ |
| #define FLEXIO_UART_HANDLE_COUNT 2 |
| |
| /*<! Private handle only used for internally. */ |
| static flexio_uart_edma_private_handle_t s_edmaPrivateHandle[FLEXIO_UART_HANDLE_COUNT]; |
| |
| /******************************************************************************* |
| * Prototypes |
| ******************************************************************************/ |
| |
| /*! |
| * @brief FLEXIO UART EDMA send finished callback function. |
| * |
| * This function is called when FLEXIO UART EDMA send finished. It disables the UART |
| * TX EDMA request and sends @ref kStatus_FLEXIO_UART_TxIdle to FLEXIO UART callback. |
| * |
| * @param handle The EDMA handle. |
| * @param param Callback function parameter. |
| */ |
| static void FLEXIO_UART_TransferSendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds); |
| |
| /*! |
| * @brief FLEXIO UART EDMA receive finished callback function. |
| * |
| * This function is called when FLEXIO UART EDMA receive finished. It disables the UART |
| * RX EDMA request and sends @ref kStatus_FLEXIO_UART_RxIdle to UART callback. |
| * |
| * @param handle The EDMA handle. |
| * @param param Callback function parameter. |
| */ |
| static void FLEXIO_UART_TransferReceiveEDMACallback(edma_handle_t *handle, |
| void *param, |
| bool transferDone, |
| uint32_t tcds); |
| |
| /******************************************************************************* |
| * Code |
| ******************************************************************************/ |
| |
| static void FLEXIO_UART_TransferSendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds) |
| { |
| flexio_uart_edma_private_handle_t *uartPrivateHandle = (flexio_uart_edma_private_handle_t *)param; |
| |
| assert(uartPrivateHandle->handle); |
| |
| /* Avoid the warning for unused variables. */ |
| handle = handle; |
| tcds = tcds; |
| |
| if (transferDone) |
| { |
| FLEXIO_UART_TransferAbortSendEDMA(uartPrivateHandle->base, uartPrivateHandle->handle); |
| |
| if (uartPrivateHandle->handle->callback) |
| { |
| uartPrivateHandle->handle->callback(uartPrivateHandle->base, uartPrivateHandle->handle, |
| kStatus_FLEXIO_UART_TxIdle, uartPrivateHandle->handle->userData); |
| } |
| } |
| } |
| |
| static void FLEXIO_UART_TransferReceiveEDMACallback(edma_handle_t *handle, |
| void *param, |
| bool transferDone, |
| uint32_t tcds) |
| { |
| flexio_uart_edma_private_handle_t *uartPrivateHandle = (flexio_uart_edma_private_handle_t *)param; |
| |
| assert(uartPrivateHandle->handle); |
| |
| /* Avoid the warning for unused variables. */ |
| handle = handle; |
| tcds = tcds; |
| |
| if (transferDone) |
| { |
| /* Disable transfer. */ |
| FLEXIO_UART_TransferAbortReceiveEDMA(uartPrivateHandle->base, uartPrivateHandle->handle); |
| |
| if (uartPrivateHandle->handle->callback) |
| { |
| uartPrivateHandle->handle->callback(uartPrivateHandle->base, uartPrivateHandle->handle, |
| kStatus_FLEXIO_UART_RxIdle, uartPrivateHandle->handle->userData); |
| } |
| } |
| } |
| |
| status_t FLEXIO_UART_TransferCreateHandleEDMA(FLEXIO_UART_Type *base, |
| flexio_uart_edma_handle_t *handle, |
| flexio_uart_edma_transfer_callback_t callback, |
| void *userData, |
| edma_handle_t *txEdmaHandle, |
| edma_handle_t *rxEdmaHandle) |
| { |
| assert(handle); |
| |
| uint8_t index = 0; |
| |
| /* Find the an empty handle pointer to store the handle. */ |
| for (index = 0; index < FLEXIO_UART_HANDLE_COUNT; index++) |
| { |
| if (s_edmaPrivateHandle[index].base == NULL) |
| { |
| s_edmaPrivateHandle[index].base = base; |
| s_edmaPrivateHandle[index].handle = handle; |
| break; |
| } |
| } |
| |
| if (index == FLEXIO_UART_HANDLE_COUNT) |
| { |
| return kStatus_OutOfRange; |
| } |
| |
| memset(handle, 0, sizeof(*handle)); |
| |
| handle->rxState = kFLEXIO_UART_RxIdle; |
| handle->txState = kFLEXIO_UART_TxIdle; |
| |
| handle->rxEdmaHandle = rxEdmaHandle; |
| handle->txEdmaHandle = txEdmaHandle; |
| |
| handle->callback = callback; |
| handle->userData = userData; |
| |
| /* Configure TX. */ |
| if (txEdmaHandle) |
| { |
| EDMA_SetCallback(handle->txEdmaHandle, FLEXIO_UART_TransferSendEDMACallback, &s_edmaPrivateHandle); |
| } |
| |
| /* Configure RX. */ |
| if (rxEdmaHandle) |
| { |
| EDMA_SetCallback(handle->rxEdmaHandle, FLEXIO_UART_TransferReceiveEDMACallback, &s_edmaPrivateHandle); |
| } |
| |
| return kStatus_Success; |
| } |
| |
| status_t FLEXIO_UART_TransferSendEDMA(FLEXIO_UART_Type *base, |
| flexio_uart_edma_handle_t *handle, |
| flexio_uart_transfer_t *xfer) |
| { |
| assert(handle->txEdmaHandle); |
| |
| edma_transfer_config_t xferConfig; |
| status_t status; |
| |
| /* Return error if xfer invalid. */ |
| if ((0U == xfer->dataSize) || (NULL == xfer->data)) |
| { |
| return kStatus_InvalidArgument; |
| } |
| |
| /* If previous TX not finished. */ |
| if (kFLEXIO_UART_TxBusy == handle->txState) |
| { |
| status = kStatus_FLEXIO_UART_TxBusy; |
| } |
| else |
| { |
| handle->txState = kFLEXIO_UART_TxBusy; |
| handle->txDataSizeAll = xfer->dataSize; |
| |
| /* Prepare transfer. */ |
| EDMA_PrepareTransfer(&xferConfig, xfer->data, sizeof(uint8_t), |
| (void *)FLEXIO_UART_GetTxDataRegisterAddress(base), sizeof(uint8_t), sizeof(uint8_t), |
| xfer->dataSize, kEDMA_MemoryToPeripheral); |
| |
| /* Store the initially configured eDMA minor byte transfer count into the FLEXIO UART handle */ |
| handle->nbytes = sizeof(uint8_t); |
| |
| /* Submit transfer. */ |
| EDMA_SubmitTransfer(handle->txEdmaHandle, &xferConfig); |
| EDMA_StartTransfer(handle->txEdmaHandle); |
| |
| /* Enable UART TX EDMA. */ |
| FLEXIO_UART_EnableTxDMA(base, true); |
| |
| status = kStatus_Success; |
| } |
| |
| return status; |
| } |
| |
| status_t FLEXIO_UART_TransferReceiveEDMA(FLEXIO_UART_Type *base, |
| flexio_uart_edma_handle_t *handle, |
| flexio_uart_transfer_t *xfer) |
| { |
| assert(handle->rxEdmaHandle); |
| |
| edma_transfer_config_t xferConfig; |
| status_t status; |
| |
| /* Return error if xfer invalid. */ |
| if ((0U == xfer->dataSize) || (NULL == xfer->data)) |
| { |
| return kStatus_InvalidArgument; |
| } |
| |
| /* If previous RX not finished. */ |
| if (kFLEXIO_UART_RxBusy == handle->rxState) |
| { |
| status = kStatus_FLEXIO_UART_RxBusy; |
| } |
| else |
| { |
| handle->rxState = kFLEXIO_UART_RxBusy; |
| handle->rxDataSizeAll = xfer->dataSize; |
| |
| /* Prepare transfer. */ |
| EDMA_PrepareTransfer(&xferConfig, (void *)FLEXIO_UART_GetRxDataRegisterAddress(base), sizeof(uint8_t), |
| xfer->data, sizeof(uint8_t), sizeof(uint8_t), xfer->dataSize, kEDMA_PeripheralToMemory); |
| |
| /* Store the initially configured eDMA minor byte transfer count into the FLEXIO UART handle */ |
| handle->nbytes = sizeof(uint8_t); |
| |
| /* Submit transfer. */ |
| EDMA_SubmitTransfer(handle->rxEdmaHandle, &xferConfig); |
| EDMA_StartTransfer(handle->rxEdmaHandle); |
| |
| /* Enable UART RX EDMA. */ |
| FLEXIO_UART_EnableRxDMA(base, true); |
| |
| status = kStatus_Success; |
| } |
| |
| return status; |
| } |
| |
| void FLEXIO_UART_TransferAbortSendEDMA(FLEXIO_UART_Type *base, flexio_uart_edma_handle_t *handle) |
| { |
| assert(handle->txEdmaHandle); |
| |
| /* Disable UART TX EDMA. */ |
| FLEXIO_UART_EnableTxDMA(base, false); |
| |
| /* Stop transfer. */ |
| EDMA_StopTransfer(handle->txEdmaHandle); |
| |
| handle->txState = kFLEXIO_UART_TxIdle; |
| } |
| |
| void FLEXIO_UART_TransferAbortReceiveEDMA(FLEXIO_UART_Type *base, flexio_uart_edma_handle_t *handle) |
| { |
| assert(handle->rxEdmaHandle); |
| |
| /* Disable UART RX EDMA. */ |
| FLEXIO_UART_EnableRxDMA(base, false); |
| |
| /* Stop transfer. */ |
| EDMA_StopTransfer(handle->rxEdmaHandle); |
| |
| handle->rxState = kFLEXIO_UART_RxIdle; |
| } |
| |
| status_t FLEXIO_UART_TransferGetReceiveCountEDMA(FLEXIO_UART_Type *base, |
| flexio_uart_edma_handle_t *handle, |
| size_t *count) |
| { |
| assert(handle); |
| assert(handle->rxEdmaHandle); |
| assert(count); |
| |
| if (kFLEXIO_UART_RxIdle == handle->rxState) |
| { |
| return kStatus_NoTransferInProgress; |
| } |
| |
| *count = handle->rxDataSizeAll - |
| (uint32_t)handle->nbytes * |
| EDMA_GetRemainingMajorLoopCount(handle->rxEdmaHandle->base, handle->rxEdmaHandle->channel); |
| |
| return kStatus_Success; |
| } |
| |
| status_t FLEXIO_UART_TransferGetSendCountEDMA(FLEXIO_UART_Type *base, flexio_uart_edma_handle_t *handle, size_t *count) |
| { |
| assert(handle); |
| assert(handle->txEdmaHandle); |
| assert(count); |
| |
| if (kFLEXIO_UART_TxIdle == handle->txState) |
| { |
| return kStatus_NoTransferInProgress; |
| } |
| |
| *count = handle->txDataSizeAll - |
| (uint32_t)handle->nbytes * |
| EDMA_GetRemainingMajorLoopCount(handle->txEdmaHandle->base, handle->txEdmaHandle->channel); |
| |
| return kStatus_Success; |
| } |
