249 lines
8.5 KiB
C
249 lines
8.5 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_flexio_camera_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.flexio_camera_edma"
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#endif
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/*<! Structure definition for camera_edma_private_handle_t. The structure is private. */
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typedef struct _flexio_camera_edma_private_handle
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{
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FLEXIO_CAMERA_Type *base;
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flexio_camera_edma_handle_t *handle;
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} flexio_camera_edma_private_handle_t;
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/* CAMERA EDMA transfer handle. */
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enum _flexio_camera_edma_tansfer_states
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{
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kFLEXIO_CAMERA_RxIdle, /* RX idle. */
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kFLEXIO_CAMERA_RxBusy /* RX busy. */
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};
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/*******************************************************************************
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* Variables
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******************************************************************************/
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/*< @brief user configurable flexio camera handle count. */
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#define FLEXIO_CAMERA_HANDLE_COUNT 1
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/*<! Private handle only used for internally. */
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static flexio_camera_edma_private_handle_t s_edmaPrivateHandle[FLEXIO_CAMERA_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 CAMERA EDMA receive finished callback function.
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*
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* This function is called when FLEXIO CAMERA EDMA receive finished. It disables the CAMERA
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* RX EDMA request and sends @ref kStatus_FLEXIO_CAMERA_RxIdle to CAMERA 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_CAMERA_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_CAMERA_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_camera_edma_private_handle_t *cameraPrivateHandle = (flexio_camera_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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FLEXIO_CAMERA_TransferAbortReceiveEDMA(cameraPrivateHandle->base, cameraPrivateHandle->handle);
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if (cameraPrivateHandle->handle->callback != NULL)
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{
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cameraPrivateHandle->handle->callback(cameraPrivateHandle->base, cameraPrivateHandle->handle,
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kStatus_FLEXIO_CAMERA_RxIdle, cameraPrivateHandle->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 Camera handle, which is used in transactional functions.
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*
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* param base Pointer to the FLEXIO_CAMERA_Type.
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* param handle Pointer to flexio_camera_edma_handle_t structure.
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* param callback The callback function.
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* param userData The parameter of the callback function.
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* param rxEdmaHandle User requested DMA handle for RX DMA transfer.
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* retval kStatus_Success Successfully create the handle.
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* retval kStatus_OutOfRange The FlexIO Camera eDMA type/handle table out of range.
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*/
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status_t FLEXIO_CAMERA_TransferCreateHandleEDMA(FLEXIO_CAMERA_Type *base,
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flexio_camera_edma_handle_t *handle,
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flexio_camera_edma_transfer_callback_t callback,
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void *userData,
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edma_handle_t *rxEdmaHandle)
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{
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assert(handle != NULL);
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uint8_t index;
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/* Find the an empty handle pointer to store the handle. */
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for (index = 0U; index < (uint8_t)FLEXIO_CAMERA_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 == (uint8_t)FLEXIO_CAMERA_HANDLE_COUNT)
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{
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return kStatus_OutOfRange;
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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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(void)memset(handle, 0, sizeof(*handle));
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handle->rxState = (uint8_t)kFLEXIO_CAMERA_RxIdle;
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handle->rxEdmaHandle = rxEdmaHandle;
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handle->callback = callback;
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handle->userData = userData;
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/* Configure RX. */
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if (rxEdmaHandle != NULL)
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{
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EDMA_SetCallback(handle->rxEdmaHandle, FLEXIO_CAMERA_TransferReceiveEDMACallback, &s_edmaPrivateHandle);
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}
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return kStatus_Success;
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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 a 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 Pointer to the FLEXIO_CAMERA_Type.
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* param handle Pointer to the flexio_camera_edma_handle_t structure.
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* param xfer Camera eDMA transfer structure, see #flexio_camera_transfer_t.
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* retval kStatus_Success if succeeded, others failed.
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* retval kStatus_CAMERA_RxBusy Previous transfer on going.
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*/
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status_t FLEXIO_CAMERA_TransferReceiveEDMA(FLEXIO_CAMERA_Type *base,
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flexio_camera_edma_handle_t *handle,
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flexio_camera_transfer_t *xfer)
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{
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assert(handle->rxEdmaHandle != NULL);
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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)kFLEXIO_CAMERA_RxBusy == handle->rxState)
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{
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status = kStatus_FLEXIO_CAMERA_RxBusy;
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}
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else
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{
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handle->rxState = (uint8_t)kFLEXIO_CAMERA_RxBusy;
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/* Prepare transfer. */
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EDMA_PrepareTransfer(&xferConfig, (uint32_t *)FLEXIO_CAMERA_GetRxBufferAddress(base), 32,
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(uint32_t *)xfer->dataAddress, 32, 32, xfer->dataNum, kEDMA_PeripheralToMemory);
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/* Store the initially configured eDMA minor byte transfer count into the FLEXIO CAMERA handle */
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handle->nbytes = 32;
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/* Submit transfer. */
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(void)EDMA_SubmitTransfer(handle->rxEdmaHandle, &xferConfig);
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EDMA_StartTransfer(handle->rxEdmaHandle);
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/* Enable CAMERA RX EDMA. */
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FLEXIO_CAMERA_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 receive data which used the eDMA.
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*
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* This function aborts the receive data which used the eDMA.
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*
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* param base Pointer to the FLEXIO_CAMERA_Type.
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* param handle Pointer to the flexio_camera_edma_handle_t structure.
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*/
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void FLEXIO_CAMERA_TransferAbortReceiveEDMA(FLEXIO_CAMERA_Type *base, flexio_camera_edma_handle_t *handle)
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{
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assert(handle->rxEdmaHandle != NULL);
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/* Disable CAMERA RX EDMA. */
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FLEXIO_CAMERA_EnableRxDMA(base, false);
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/* Stop transfer. */
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EDMA_StopTransfer(handle->rxEdmaHandle);
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handle->rxState = (uint8_t)kFLEXIO_CAMERA_RxIdle;
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}
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/*!
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* brief Gets the remaining bytes to be received.
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*
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* This function gets the number of bytes still not received.
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*
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* param base Pointer to the FLEXIO_CAMERA_Type.
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* param handle Pointer to the flexio_camera_edma_handle_t structure.
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* param count Number of bytes sent so far by the non-blocking transaction.
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* retval kStatus_Success Succeed get the transfer count.
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* retval kStatus_InvalidArgument The count parameter is invalid.
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*/
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status_t FLEXIO_CAMERA_TransferGetReceiveCountEDMA(FLEXIO_CAMERA_Type *base,
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flexio_camera_edma_handle_t *handle,
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size_t *count)
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{
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assert(handle->rxEdmaHandle != NULL);
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if (NULL == count)
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{
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return kStatus_InvalidArgument;
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}
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if ((uint8_t)kFLEXIO_CAMERA_RxBusy == handle->rxState)
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{
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*count = (handle->rxSize -
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(uint32_t)handle->nbytes *
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EDMA_GetRemainingMajorLoopCount(handle->rxEdmaHandle->base, handle->rxEdmaHandle->channel));
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}
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else
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{
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*count = handle->rxSize;
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}
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return kStatus_Success;
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}
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