| /* |
| * Copyright (c) 2015, Freescale Semiconductor, Inc. |
| * Copyright 2016-2017 NXP |
| * All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include "fsl_flexio_uart_edma.h" |
| |
| /******************************************************************************* |
| * Definitions |
| ******************************************************************************/ |
| |
| /* Component ID definition, used by tools. */ |
| #ifndef FSL_COMPONENT_ID |
| #define FSL_COMPONENT_ID "platform.drivers.flexio_uart_edma" |
| #endif |
| |
| /*<! 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. */ |
| }; |
| |
| /******************************************************************************* |
| * Variables |
| ******************************************************************************/ |
| |
| /*< @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); |
| } |
| } |
| } |
| |
| /*! |
| * brief Initializes the UART handle which is used in transactional functions. |
| * |
| * param base Pointer to FLEXIO_UART_Type. |
| * param handle Pointer to flexio_uart_edma_handle_t structure. |
| * param callback The callback function. |
| * param userData The parameter of the callback function. |
| * param rxEdmaHandle User requested DMA handle for RX DMA transfer. |
| * param txEdmaHandle User requested DMA handle for TX DMA transfer. |
| * retval kStatus_Success Successfully create the handle. |
| * retval kStatus_OutOfRange The FlexIO SPI eDMA type/handle table out of range. |
| */ |
| 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; |
| } |
| |
| /*! |
| * brief Sends data using eDMA. |
| * |
| * This function sends data using eDMA. This is a non-blocking function, which returns |
| * right away. When all data is sent out, the send callback function is called. |
| * |
| * param base Pointer to FLEXIO_UART_Type |
| * param handle UART handle pointer. |
| * param xfer UART eDMA transfer structure, see #flexio_uart_transfer_t. |
| * retval kStatus_Success if succeed, others failed. |
| * retval kStatus_FLEXIO_UART_TxBusy Previous transfer on going. |
| */ |
| 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; |
| } |
| |
| /*! |
| * brief Receives data using eDMA. |
| * |
| * This function receives data using eDMA. This is a non-blocking function, which returns |
| * right away. When all data is received, the receive callback function is called. |
| * |
| * param base Pointer to FLEXIO_UART_Type |
| * param handle Pointer to flexio_uart_edma_handle_t structure |
| * param xfer UART eDMA transfer structure, see #flexio_uart_transfer_t. |
| * retval kStatus_Success if succeed, others failed. |
| * retval kStatus_UART_RxBusy Previous transfer on going. |
| */ |
| 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; |
| } |
| |
| /*! |
| * brief Aborts the sent data which using eDMA. |
| * |
| * This function aborts sent data which using eDMA. |
| * |
| * param base Pointer to FLEXIO_UART_Type |
| * param handle Pointer to flexio_uart_edma_handle_t structure |
| */ |
| 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; |
| } |
| |
| /*! |
| * brief Aborts the receive data which using eDMA. |
| * |
| * This function aborts the receive data which using eDMA. |
| * |
| * param base Pointer to FLEXIO_UART_Type |
| * param handle Pointer to flexio_uart_edma_handle_t structure |
| */ |
| 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; |
| } |
| |
| /*! |
| * brief Gets the number of bytes received. |
| * |
| * This function gets the number of bytes received. |
| * |
| * param base Pointer to FLEXIO_UART_Type |
| * param handle Pointer to flexio_uart_edma_handle_t structure |
| * param count Number of bytes received so far by the non-blocking transaction. |
| * retval kStatus_NoTransferInProgress transfer has finished or no transfer in progress. |
| * retval kStatus_Success Successfully return the count. |
| */ |
| 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; |
| } |
| |
| /*! |
| * brief Gets the number of bytes sent out. |
| * |
| * This function gets the number of bytes sent out. |
| * |
| * param base Pointer to FLEXIO_UART_Type |
| * param handle Pointer to flexio_uart_edma_handle_t structure |
| * param count Number of bytes sent so far by the non-blocking transaction. |
| * retval kStatus_NoTransferInProgress transfer has finished or no transfer in progress. |
| * retval kStatus_Success Successfully return the count. |
| */ |
| 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; |
| } |