488 lines
16 KiB
C
488 lines
16 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2020 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include "fsl_lpuart_edma.h"
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/* Component ID definition, used by tools. */
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#ifndef FSL_COMPONENT_ID
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#define FSL_COMPONENT_ID "platform.drivers.lpuart_edma"
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#endif
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/*<! Structure definition for lpuart_edma_private_handle_t. The structure is private. */
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typedef struct _lpuart_edma_private_handle
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{
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LPUART_Type *base;
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lpuart_edma_handle_t *handle;
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} lpuart_edma_private_handle_t;
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/* LPUART EDMA transfer handle. */
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enum
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{
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kLPUART_TxIdle, /* TX idle. */
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kLPUART_TxBusy, /* TX busy. */
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kLPUART_RxIdle, /* RX idle. */
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kLPUART_RxBusy /* RX busy. */
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};
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/*******************************************************************************
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* Variables
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******************************************************************************/
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/* Array of LPUART handle. */
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#if (defined(LPUART8))
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#define LPUART_HANDLE_ARRAY_SIZE 9
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#else /* LPUART8 */
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#if (defined(LPUART7))
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#define LPUART_HANDLE_ARRAY_SIZE 8
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#else /* LPUART7 */
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#if (defined(LPUART6))
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#define LPUART_HANDLE_ARRAY_SIZE 7
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#else /* LPUART6 */
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#if (defined(LPUART5))
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#define LPUART_HANDLE_ARRAY_SIZE 6
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#else /* LPUART5 */
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#if (defined(LPUART4))
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#define LPUART_HANDLE_ARRAY_SIZE 5
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#else /* LPUART4 */
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#if (defined(LPUART3))
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#define LPUART_HANDLE_ARRAY_SIZE 4
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#else /* LPUART3 */
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#if (defined(LPUART2))
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#define LPUART_HANDLE_ARRAY_SIZE 3
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#else /* LPUART2 */
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#if (defined(LPUART1))
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#define LPUART_HANDLE_ARRAY_SIZE 2
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#else /* LPUART1 */
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#if (defined(LPUART0))
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#define LPUART_HANDLE_ARRAY_SIZE 1
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#else /* LPUART0 */
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#define LPUART_HANDLE_ARRAY_SIZE FSL_FEATURE_SOC_LPUART_COUNT
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#endif /* LPUART 0 */
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#endif /* LPUART 1 */
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#endif /* LPUART 2 */
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#endif /* LPUART 3 */
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#endif /* LPUART 4 */
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#endif /* LPUART 5 */
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#endif /* LPUART 6 */
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#endif /* LPUART 7 */
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#endif /* LPUART 8 */
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/*<! Private handle only used for internally. */
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static lpuart_edma_private_handle_t s_lpuartEdmaPrivateHandle[LPUART_HANDLE_ARRAY_SIZE];
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*!
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* @brief LPUART EDMA send finished callback function.
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*
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* This function is called when LPUART EDMA send finished. It disables the LPUART
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* TX EDMA request and sends @ref kStatus_LPUART_TxIdle to LPUART 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 LPUART_SendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
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/*!
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* @brief LPUART EDMA receive finished callback function.
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*
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* This function is called when LPUART EDMA receive finished. It disables the LPUART
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* RX EDMA request and sends @ref kStatus_LPUART_RxIdle to LPUART 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 LPUART_ReceiveEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
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/*******************************************************************************
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* Code
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******************************************************************************/
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static void LPUART_SendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
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{
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assert(NULL != param);
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lpuart_edma_private_handle_t *lpuartPrivateHandle = (lpuart_edma_private_handle_t *)param;
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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 LPUART TX EDMA. */
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LPUART_EnableTxDMA(lpuartPrivateHandle->base, false);
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/* Stop transfer. */
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EDMA_AbortTransfer(handle);
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/* Enable tx complete interrupt */
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LPUART_EnableInterrupts(lpuartPrivateHandle->base, (uint32_t)kLPUART_TransmissionCompleteInterruptEnable);
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}
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}
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static void LPUART_ReceiveEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
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{
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assert(NULL != param);
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lpuart_edma_private_handle_t *lpuartPrivateHandle = (lpuart_edma_private_handle_t *)param;
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/* Avoid warning for unused parameters. */
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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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LPUART_TransferAbortReceiveEDMA(lpuartPrivateHandle->base, lpuartPrivateHandle->handle);
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if (NULL != lpuartPrivateHandle->handle->callback)
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{
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lpuartPrivateHandle->handle->callback(lpuartPrivateHandle->base, lpuartPrivateHandle->handle,
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kStatus_LPUART_RxIdle, lpuartPrivateHandle->handle->userData);
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}
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}
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}
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/*!
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* brief Initializes the LPUART handle which is used in transactional functions.
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*
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* note This function disables all LPUART interrupts.
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*
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* param base LPUART peripheral base address.
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* param handle Pointer to lpuart_edma_handle_t structure.
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* param callback Callback function.
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* param userData User data.
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* param txEdmaHandle User requested DMA handle for TX DMA transfer.
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* param rxEdmaHandle User requested DMA handle for RX DMA transfer.
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*/
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void LPUART_TransferCreateHandleEDMA(LPUART_Type *base,
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lpuart_edma_handle_t *handle,
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lpuart_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(NULL != handle);
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uint32_t instance = LPUART_GetInstance(base);
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s_lpuartEdmaPrivateHandle[instance].base = base;
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s_lpuartEdmaPrivateHandle[instance].handle = handle;
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(void)memset(handle, 0, sizeof(*handle));
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handle->rxState = (uint8_t)kLPUART_RxIdle;
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handle->txState = (uint8_t)kLPUART_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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#if defined(FSL_FEATURE_LPUART_HAS_FIFO) && FSL_FEATURE_LPUART_HAS_FIFO
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/* Note:
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Take care of the RX FIFO, EDMA request only assert when received bytes
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equal or more than RX water mark, there is potential issue if RX water
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mark larger than 1.
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For example, if RX FIFO water mark is 2, upper layer needs 5 bytes and
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5 bytes are received. the last byte will be saved in FIFO but not trigger
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EDMA transfer because the water mark is 2.
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*/
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if (NULL != rxEdmaHandle)
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{
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base->WATER &= (~LPUART_WATER_RXWATER_MASK);
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}
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#endif
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/* Save the handle in global variables to support the double weak mechanism. */
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s_lpuartHandle[instance] = handle;
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/* Set LPUART_TransferEdmaHandleIRQ as DMA IRQ handler */
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s_lpuartIsr = LPUART_TransferEdmaHandleIRQ;
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/* Disable all LPUART internal interrupts */
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LPUART_DisableInterrupts(base, (uint32_t)kLPUART_AllInterruptEnable);
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/* Enable interrupt in NVIC. */
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#if defined(FSL_FEATURE_LPUART_HAS_SEPARATE_RX_TX_IRQ) && FSL_FEATURE_LPUART_HAS_SEPARATE_RX_TX_IRQ
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(void)EnableIRQ(s_lpuartTxIRQ[instance]);
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#else
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(void)EnableIRQ(s_lpuartIRQ[instance]);
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#endif
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/* Configure TX. */
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if (NULL != txEdmaHandle)
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{
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EDMA_SetCallback(handle->txEdmaHandle, LPUART_SendEDMACallback, &s_lpuartEdmaPrivateHandle[instance]);
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}
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/* Configure RX. */
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if (NULL != rxEdmaHandle)
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{
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EDMA_SetCallback(handle->rxEdmaHandle, LPUART_ReceiveEDMACallback, &s_lpuartEdmaPrivateHandle[instance]);
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}
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}
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/*!
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* brief Sends data using eDMA.
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*
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* This function sends data using eDMA. This is a non-blocking function, which returns
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* right away. When all data is sent, the send callback function is called.
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*
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* param base LPUART peripheral base address.
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* param handle LPUART handle pointer.
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* param xfer LPUART eDMA transfer structure. See #lpuart_transfer_t.
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* retval kStatus_Success if succeed, others failed.
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* retval kStatus_LPUART_TxBusy Previous transfer on going.
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* retval kStatus_InvalidArgument Invalid argument.
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*/
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status_t LPUART_SendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer)
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{
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assert(NULL != handle);
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assert(NULL != handle->txEdmaHandle);
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assert(NULL != xfer);
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assert(NULL != xfer->data);
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assert(0U != xfer->dataSize);
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edma_transfer_config_t xferConfig;
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status_t status;
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/* If previous TX not finished. */
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if ((uint8_t)kLPUART_TxBusy == handle->txState)
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{
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status = kStatus_LPUART_TxBusy;
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}
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else
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{
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handle->txState = (uint8_t)kLPUART_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 *)(uint32_t *)LPUART_GetDataRegisterAddress(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 LPUART handle */
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handle->nbytes = (uint8_t)sizeof(uint8_t);
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/* Submit transfer. */
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if (kStatus_Success !=
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EDMA_SubmitTransfer(handle->txEdmaHandle, (const edma_transfer_config_t *)(uint32_t)&xferConfig))
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{
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return kStatus_Fail;
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}
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EDMA_StartTransfer(handle->txEdmaHandle);
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/* Enable LPUART TX EDMA. */
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LPUART_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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/*!
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* brief Receives data using eDMA.
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*
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* This function receives data using eDMA. This is non-blocking function, which returns
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* right away. When all data is received, the receive callback function is called.
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*
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* param base LPUART peripheral base address.
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* param handle Pointer to lpuart_edma_handle_t structure.
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* param xfer LPUART eDMA transfer structure, see #lpuart_transfer_t.
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* retval kStatus_Success if succeed, others fail.
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* retval kStatus_LPUART_RxBusy Previous transfer ongoing.
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* retval kStatus_InvalidArgument Invalid argument.
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*/
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status_t LPUART_ReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer)
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{
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assert(NULL != handle);
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assert(NULL != handle->rxEdmaHandle);
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assert(NULL != xfer);
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assert(NULL != xfer->data);
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assert(0U != xfer->dataSize);
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edma_transfer_config_t xferConfig;
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status_t status;
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/* If previous RX not finished. */
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if ((uint8_t)kLPUART_RxBusy == handle->rxState)
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{
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status = kStatus_LPUART_RxBusy;
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}
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else
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{
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handle->rxState = (uint8_t)kLPUART_RxBusy;
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handle->rxDataSizeAll = xfer->dataSize;
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/* Prepare transfer. */
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EDMA_PrepareTransfer(&xferConfig, (void *)(uint32_t *)LPUART_GetDataRegisterAddress(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 LPUART handle */
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handle->nbytes = (uint8_t)sizeof(uint8_t);
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/* Submit transfer. */
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if (kStatus_Success !=
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EDMA_SubmitTransfer(handle->rxEdmaHandle, (const edma_transfer_config_t *)(uint32_t)&xferConfig))
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{
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return kStatus_Fail;
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}
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EDMA_StartTransfer(handle->rxEdmaHandle);
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/* Enable LPUART RX EDMA. */
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LPUART_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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/*!
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* brief Aborts the sent data using eDMA.
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*
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* This function aborts the sent data using eDMA.
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*
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* param base LPUART peripheral base address.
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* param handle Pointer to lpuart_edma_handle_t structure.
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*/
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void LPUART_TransferAbortSendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle)
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{
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assert(NULL != handle);
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assert(NULL != handle->txEdmaHandle);
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/* Disable LPUART TX EDMA. */
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LPUART_EnableTxDMA(base, false);
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/* Stop transfer. */
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EDMA_AbortTransfer(handle->txEdmaHandle);
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handle->txState = (uint8_t)kLPUART_TxIdle;
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}
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/*!
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* brief Aborts the received data using eDMA.
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*
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* This function aborts the received data using eDMA.
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*
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* param base LPUART peripheral base address.
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* param handle Pointer to lpuart_edma_handle_t structure.
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*/
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void LPUART_TransferAbortReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle)
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{
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assert(NULL != handle);
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assert(NULL != handle->rxEdmaHandle);
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/* Disable LPUART RX EDMA. */
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LPUART_EnableRxDMA(base, false);
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/* Stop transfer. */
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EDMA_AbortTransfer(handle->rxEdmaHandle);
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handle->rxState = (uint8_t)kLPUART_RxIdle;
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}
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/*!
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* brief Gets the number of received bytes.
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*
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* This function gets the number of received bytes.
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*
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* param base LPUART peripheral base address.
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* param handle LPUART handle pointer.
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* param count Receive bytes count.
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* retval kStatus_NoTransferInProgress No receive in progress.
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* retval kStatus_InvalidArgument Parameter is invalid.
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* retval kStatus_Success Get successfully through the parameter \p count;
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*/
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status_t LPUART_TransferGetReceiveCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count)
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{
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assert(NULL != handle);
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assert(NULL != handle->rxEdmaHandle);
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assert(NULL != count);
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if ((uint8_t)kLPUART_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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/*!
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* brief Gets the number of bytes written to the LPUART TX register.
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*
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* This function gets the number of bytes written to the LPUART TX
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* register by DMA.
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*
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* param base LPUART peripheral base address.
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* param handle LPUART handle pointer.
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* param count Send bytes count.
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* retval kStatus_NoTransferInProgress No send in progress.
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* retval kStatus_InvalidArgument Parameter is invalid.
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* retval kStatus_Success Get successfully through the parameter \p count;
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*/
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status_t LPUART_TransferGetSendCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count)
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{
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assert(NULL != handle);
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assert(NULL != handle->txEdmaHandle);
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assert(NULL != count);
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if ((uint8_t)kLPUART_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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/*!
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* brief LPUART eDMA IRQ handle function.
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*
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* This function handles the LPUART tx complete IRQ request and invoke user callback.
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* It is not set to static so that it can be used in user application.
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* note This function is used as default IRQ handler by double weak mechanism.
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* If user's specific IRQ handler is implemented, make sure this function is invoked in the handler.
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*
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* param base LPUART peripheral base address.
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* param lpuartEdmaHandle LPUART handle pointer.
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*/
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void LPUART_TransferEdmaHandleIRQ(LPUART_Type *base, void *lpuartEdmaHandle)
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{
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assert(lpuartEdmaHandle != NULL);
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if (((uint32_t)kLPUART_TransmissionCompleteFlag & LPUART_GetStatusFlags(base)) != 0U)
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{
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lpuart_edma_handle_t *handle = (lpuart_edma_handle_t *)lpuartEdmaHandle;
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/* Disable tx complete interrupt */
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LPUART_DisableInterrupts(base, (uint32_t)kLPUART_TransmissionCompleteInterruptEnable);
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handle->txState = (uint8_t)kLPUART_TxIdle;
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if (handle->callback != NULL)
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{
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handle->callback(base, handle, kStatus_LPUART_TxIdle, handle->userData);
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}
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}
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}
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