| /* |
| * Copyright (c) 2015, Freescale Semiconductor, Inc. |
| * Copyright 2016-2018 NXP |
| * All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include "fsl_flexio_i2s_edma.h" |
| |
| /* Component ID definition, used by tools. */ |
| #ifndef FSL_COMPONENT_ID |
| #define FSL_COMPONENT_ID "platform.drivers.flexio_i2s_edma" |
| #endif |
| |
| /******************************************************************************* |
| * Definitations |
| ******************************************************************************/ |
| /* Used for 32byte aligned */ |
| #define STCD_ADDR(address) (edma_tcd_t *)(((uint32_t)(address) + 32) & ~0x1FU) |
| |
| /*<! Structure definition for flexio_i2s_edma_private_handle_t. The structure is private. */ |
| typedef struct _flexio_i2s_edma_private_handle |
| { |
| FLEXIO_I2S_Type *base; |
| flexio_i2s_edma_handle_t *handle; |
| } flexio_i2s_edma_private_handle_t; |
| |
| enum _flexio_i2s_edma_transfer_state |
| { |
| kFLEXIO_I2S_Busy = 0x0U, /*!< FLEXIO I2S is busy */ |
| kFLEXIO_I2S_Idle, /*!< Transfer is done. */ |
| }; |
| |
| /*<! Private handle only used for internally. */ |
| static flexio_i2s_edma_private_handle_t s_edmaPrivateHandle[2]; |
| |
| /******************************************************************************* |
| * Prototypes |
| ******************************************************************************/ |
| /*! |
| * @brief FLEXIO I2S EDMA callback for send. |
| * |
| * @param handle pointer to flexio_i2s_edma_handle_t structure which stores the transfer state. |
| * @param userData Parameter for user callback. |
| * @param done If the DMA transfer finished. |
| * @param tcds The TCD index. |
| */ |
| static void FLEXIO_I2S_TxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds); |
| |
| /*! |
| * @brief FLEXIO I2S EDMA callback for receive. |
| * |
| * @param handle pointer to flexio_i2s_edma_handle_t structure which stores the transfer state. |
| * @param userData Parameter for user callback. |
| * @param done If the DMA transfer finished. |
| * @param tcds The TCD index. |
| */ |
| static void FLEXIO_I2S_RxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds); |
| |
| /******************************************************************************* |
| * Code |
| ******************************************************************************/ |
| static void FLEXIO_I2S_TxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds) |
| { |
| flexio_i2s_edma_private_handle_t *privHandle = (flexio_i2s_edma_private_handle_t *)userData; |
| flexio_i2s_edma_handle_t *flexio_i2sHandle = privHandle->handle; |
| |
| /* If finished a blcok, call the callback function */ |
| memset(&flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver], 0, sizeof(flexio_i2s_transfer_t)); |
| flexio_i2sHandle->queueDriver = (flexio_i2sHandle->queueDriver + 1) % FLEXIO_I2S_XFER_QUEUE_SIZE; |
| if (flexio_i2sHandle->callback) |
| { |
| (flexio_i2sHandle->callback)(privHandle->base, flexio_i2sHandle, kStatus_Success, flexio_i2sHandle->userData); |
| } |
| |
| /* If all data finished, just stop the transfer */ |
| if (flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver].data == NULL) |
| { |
| FLEXIO_I2S_TransferAbortSendEDMA(privHandle->base, flexio_i2sHandle); |
| } |
| } |
| |
| static void FLEXIO_I2S_RxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds) |
| { |
| flexio_i2s_edma_private_handle_t *privHandle = (flexio_i2s_edma_private_handle_t *)userData; |
| flexio_i2s_edma_handle_t *flexio_i2sHandle = privHandle->handle; |
| |
| /* If finished a blcok, call the callback function */ |
| memset(&flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver], 0, sizeof(flexio_i2s_transfer_t)); |
| flexio_i2sHandle->queueDriver = (flexio_i2sHandle->queueDriver + 1) % FLEXIO_I2S_XFER_QUEUE_SIZE; |
| if (flexio_i2sHandle->callback) |
| { |
| (flexio_i2sHandle->callback)(privHandle->base, flexio_i2sHandle, kStatus_Success, flexio_i2sHandle->userData); |
| } |
| |
| /* If all data finished, just stop the transfer */ |
| if (flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver].data == NULL) |
| { |
| FLEXIO_I2S_TransferAbortReceiveEDMA(privHandle->base, flexio_i2sHandle); |
| } |
| } |
| |
| /*! |
| * brief Initializes the FlexIO I2S eDMA handle. |
| * |
| * This function initializes the FlexIO I2S master DMA handle which can be used for other FlexIO I2S master |
| * transactional APIs. |
| * Usually, for a specified FlexIO I2S instance, call this API once to get the initialized handle. |
| * |
| * param base FlexIO I2S peripheral base address. |
| * param handle FlexIO I2S eDMA handle pointer. |
| * param callback FlexIO I2S eDMA callback function called while finished a block. |
| * param userData User parameter for callback. |
| * param dmaHandle eDMA handle for FlexIO I2S. This handle is a static value allocated by users. |
| */ |
| void FLEXIO_I2S_TransferTxCreateHandleEDMA(FLEXIO_I2S_Type *base, |
| flexio_i2s_edma_handle_t *handle, |
| flexio_i2s_edma_callback_t callback, |
| void *userData, |
| edma_handle_t *dmaHandle) |
| { |
| assert(handle && dmaHandle); |
| |
| /* Zero the handle. */ |
| memset(handle, 0, sizeof(*handle)); |
| |
| /* Set flexio_i2s base to handle */ |
| handle->dmaHandle = dmaHandle; |
| handle->callback = callback; |
| handle->userData = userData; |
| |
| /* Set FLEXIO I2S state to idle */ |
| handle->state = kFLEXIO_I2S_Idle; |
| |
| s_edmaPrivateHandle[0].base = base; |
| s_edmaPrivateHandle[0].handle = handle; |
| |
| /* Need to use scatter gather */ |
| EDMA_InstallTCDMemory(dmaHandle, STCD_ADDR(handle->tcd), FLEXIO_I2S_XFER_QUEUE_SIZE); |
| |
| /* Install callback for Tx dma channel */ |
| EDMA_SetCallback(dmaHandle, FLEXIO_I2S_TxEDMACallback, &s_edmaPrivateHandle[0]); |
| } |
| |
| /*! |
| * brief Initializes the FlexIO I2S Rx eDMA handle. |
| * |
| * This function initializes the FlexIO I2S slave DMA handle which can be used for other FlexIO I2S master transactional |
| * APIs. |
| * Usually, for a specified FlexIO I2S instance, call this API once to get the initialized handle. |
| * |
| * param base FlexIO I2S peripheral base address. |
| * param handle FlexIO I2S eDMA handle pointer. |
| * param callback FlexIO I2S eDMA callback function called while finished a block. |
| * param userData User parameter for callback. |
| * param dmaHandle eDMA handle for FlexIO I2S. This handle is a static value allocated by users. |
| */ |
| void FLEXIO_I2S_TransferRxCreateHandleEDMA(FLEXIO_I2S_Type *base, |
| flexio_i2s_edma_handle_t *handle, |
| flexio_i2s_edma_callback_t callback, |
| void *userData, |
| edma_handle_t *dmaHandle) |
| { |
| assert(handle && dmaHandle); |
| |
| /* Zero the handle. */ |
| memset(handle, 0, sizeof(*handle)); |
| |
| /* Set flexio_i2s base to handle */ |
| handle->dmaHandle = dmaHandle; |
| handle->callback = callback; |
| handle->userData = userData; |
| |
| /* Set FLEXIO I2S state to idle */ |
| handle->state = kFLEXIO_I2S_Idle; |
| |
| s_edmaPrivateHandle[1].base = base; |
| s_edmaPrivateHandle[1].handle = handle; |
| |
| /* Need to use scatter gather */ |
| EDMA_InstallTCDMemory(dmaHandle, STCD_ADDR(handle->tcd), FLEXIO_I2S_XFER_QUEUE_SIZE); |
| |
| /* Install callback for Tx dma channel */ |
| EDMA_SetCallback(dmaHandle, FLEXIO_I2S_RxEDMACallback, &s_edmaPrivateHandle[1]); |
| } |
| |
| /*! |
| * brief Configures the FlexIO I2S Tx audio format. |
| * |
| * Audio format can be changed in run-time of FlexIO I2S. This function configures the sample rate and audio data |
| * format to be transferred. This function also sets the eDMA parameter according to format. |
| * |
| * param base FlexIO I2S peripheral base address. |
| * param handle FlexIO I2S eDMA handle pointer |
| * param format Pointer to FlexIO I2S audio data format structure. |
| * param srcClock_Hz FlexIO I2S clock source frequency in Hz, it should be 0 while in slave mode. |
| * retval kStatus_Success Audio format set successfully. |
| * retval kStatus_InvalidArgument The input arguments is invalid. |
| */ |
| void FLEXIO_I2S_TransferSetFormatEDMA(FLEXIO_I2S_Type *base, |
| flexio_i2s_edma_handle_t *handle, |
| flexio_i2s_format_t *format, |
| uint32_t srcClock_Hz) |
| { |
| assert(handle && format); |
| |
| /* Configure the audio format to FLEXIO I2S registers */ |
| if (srcClock_Hz != 0) |
| { |
| /* It is master */ |
| FLEXIO_I2S_MasterSetFormat(base, format, srcClock_Hz); |
| } |
| else |
| { |
| FLEXIO_I2S_SlaveSetFormat(base, format); |
| } |
| |
| /* Get the tranfer size from format, this should be used in EDMA configuration */ |
| handle->bytesPerFrame = format->bitWidth / 8U; |
| } |
| |
| /*! |
| * brief Performs a non-blocking FlexIO I2S transfer using DMA. |
| * |
| * note This interface returned immediately after transfer initiates. Users should call |
| * FLEXIO_I2S_GetTransferStatus to poll the transfer status and check whether the FlexIO I2S transfer is finished. |
| * |
| * param base FlexIO I2S peripheral base address. |
| * param handle FlexIO I2S DMA handle pointer. |
| * param xfer Pointer to DMA transfer structure. |
| * retval kStatus_Success Start a FlexIO I2S eDMA send successfully. |
| * retval kStatus_InvalidArgument The input arguments is invalid. |
| * retval kStatus_TxBusy FlexIO I2S is busy sending data. |
| */ |
| status_t FLEXIO_I2S_TransferSendEDMA(FLEXIO_I2S_Type *base, |
| flexio_i2s_edma_handle_t *handle, |
| flexio_i2s_transfer_t *xfer) |
| { |
| assert(handle && xfer); |
| |
| edma_transfer_config_t config = {0}; |
| uint32_t destAddr = FLEXIO_I2S_TxGetDataRegisterAddress(base) + (4U - handle->bytesPerFrame); |
| |
| /* Check if input parameter invalid */ |
| if ((xfer->data == NULL) || (xfer->dataSize == 0U)) |
| { |
| return kStatus_InvalidArgument; |
| } |
| |
| if (handle->queue[handle->queueUser].data) |
| { |
| return kStatus_FLEXIO_I2S_QueueFull; |
| } |
| |
| /* Change the state of handle */ |
| handle->state = kFLEXIO_I2S_Busy; |
| |
| /* Update the queue state */ |
| handle->queue[handle->queueUser].data = xfer->data; |
| handle->queue[handle->queueUser].dataSize = xfer->dataSize; |
| handle->transferSize[handle->queueUser] = xfer->dataSize; |
| handle->queueUser = (handle->queueUser + 1) % FLEXIO_I2S_XFER_QUEUE_SIZE; |
| |
| /* Prepare edma configure */ |
| EDMA_PrepareTransfer(&config, xfer->data, handle->bytesPerFrame, (void *)destAddr, handle->bytesPerFrame, |
| handle->bytesPerFrame, xfer->dataSize, kEDMA_MemoryToPeripheral); |
| |
| /* Store the initially configured eDMA minor byte transfer count into the FLEXIO I2S handle */ |
| handle->nbytes = handle->bytesPerFrame; |
| |
| EDMA_SubmitTransfer(handle->dmaHandle, &config); |
| |
| /* Start DMA transfer */ |
| EDMA_StartTransfer(handle->dmaHandle); |
| |
| /* Enable DMA enable bit */ |
| FLEXIO_I2S_TxEnableDMA(base, true); |
| |
| /* Enable FLEXIO I2S Tx clock */ |
| FLEXIO_I2S_Enable(base, true); |
| |
| return kStatus_Success; |
| } |
| |
| /*! |
| * brief Performs a non-blocking FlexIO I2S receive using eDMA. |
| * |
| * note This interface returned immediately after transfer initiates. Users should call |
| * FLEXIO_I2S_GetReceiveRemainingBytes to poll the transfer status and check whether the FlexIO I2S transfer is |
| * finished. |
| * |
| * param base FlexIO I2S peripheral base address. |
| * param handle FlexIO I2S DMA handle pointer. |
| * param xfer Pointer to DMA transfer structure. |
| * retval kStatus_Success Start a FlexIO I2S eDMA receive successfully. |
| * retval kStatus_InvalidArgument The input arguments is invalid. |
| * retval kStatus_RxBusy FlexIO I2S is busy receiving data. |
| */ |
| status_t FLEXIO_I2S_TransferReceiveEDMA(FLEXIO_I2S_Type *base, |
| flexio_i2s_edma_handle_t *handle, |
| flexio_i2s_transfer_t *xfer) |
| { |
| assert(handle && xfer); |
| |
| edma_transfer_config_t config = {0}; |
| uint32_t srcAddr = FLEXIO_I2S_RxGetDataRegisterAddress(base); |
| |
| /* Check if input parameter invalid */ |
| if ((xfer->data == NULL) || (xfer->dataSize == 0U)) |
| { |
| return kStatus_InvalidArgument; |
| } |
| |
| if (handle->queue[handle->queueUser].data) |
| { |
| return kStatus_FLEXIO_I2S_QueueFull; |
| } |
| |
| /* Change the state of handle */ |
| handle->state = kFLEXIO_I2S_Busy; |
| |
| /* Update queue state */ |
| handle->queue[handle->queueUser].data = xfer->data; |
| handle->queue[handle->queueUser].dataSize = xfer->dataSize; |
| handle->transferSize[handle->queueUser] = xfer->dataSize; |
| handle->queueUser = (handle->queueUser + 1) % FLEXIO_I2S_XFER_QUEUE_SIZE; |
| |
| /* Prepare edma configure */ |
| EDMA_PrepareTransfer(&config, (void *)srcAddr, handle->bytesPerFrame, xfer->data, handle->bytesPerFrame, |
| handle->bytesPerFrame, xfer->dataSize, kEDMA_PeripheralToMemory); |
| |
| /* Store the initially configured eDMA minor byte transfer count into the FLEXIO I2S handle */ |
| handle->nbytes = handle->bytesPerFrame; |
| |
| EDMA_SubmitTransfer(handle->dmaHandle, &config); |
| |
| /* Start DMA transfer */ |
| EDMA_StartTransfer(handle->dmaHandle); |
| |
| /* Enable DMA enable bit */ |
| FLEXIO_I2S_RxEnableDMA(base, true); |
| |
| /* Enable FLEXIO I2S Rx clock */ |
| FLEXIO_I2S_Enable(base, true); |
| |
| return kStatus_Success; |
| } |
| |
| /*! |
| * brief Aborts a FlexIO I2S transfer using eDMA. |
| * |
| * param base FlexIO I2S peripheral base address. |
| * param handle FlexIO I2S DMA handle pointer. |
| */ |
| void FLEXIO_I2S_TransferAbortSendEDMA(FLEXIO_I2S_Type *base, flexio_i2s_edma_handle_t *handle) |
| { |
| assert(handle); |
| |
| /* Disable dma */ |
| EDMA_AbortTransfer(handle->dmaHandle); |
| |
| /* Disable DMA enable bit */ |
| FLEXIO_I2S_TxEnableDMA(base, false); |
| |
| /* Set the handle state */ |
| handle->state = kFLEXIO_I2S_Idle; |
| } |
| |
| /*! |
| * brief Aborts a FlexIO I2S receive using eDMA. |
| * |
| * param base FlexIO I2S peripheral base address. |
| * param handle FlexIO I2S DMA handle pointer. |
| */ |
| void FLEXIO_I2S_TransferAbortReceiveEDMA(FLEXIO_I2S_Type *base, flexio_i2s_edma_handle_t *handle) |
| { |
| assert(handle); |
| |
| /* Disable dma */ |
| EDMA_AbortTransfer(handle->dmaHandle); |
| |
| /* Disable DMA enable bit */ |
| FLEXIO_I2S_RxEnableDMA(base, false); |
| |
| /* Set the handle state */ |
| handle->state = kFLEXIO_I2S_Idle; |
| } |
| |
| /*! |
| * brief Gets the remaining bytes to be sent. |
| * |
| * param base FlexIO I2S peripheral base address. |
| * param handle FlexIO I2S DMA handle pointer. |
| * param count Bytes sent. |
| * retval kStatus_Success Succeed get the transfer count. |
| * retval kStatus_NoTransferInProgress There is not a non-blocking transaction currently in progress. |
| */ |
| status_t FLEXIO_I2S_TransferGetSendCountEDMA(FLEXIO_I2S_Type *base, flexio_i2s_edma_handle_t *handle, size_t *count) |
| { |
| assert(handle); |
| |
| status_t status = kStatus_Success; |
| |
| if (handle->state != kFLEXIO_I2S_Busy) |
| { |
| status = kStatus_NoTransferInProgress; |
| } |
| else |
| { |
| *count = handle->transferSize[handle->queueDriver] - |
| (uint32_t)handle->nbytes * |
| EDMA_GetRemainingMajorLoopCount(handle->dmaHandle->base, handle->dmaHandle->channel); |
| } |
| |
| return status; |
| } |
| |
| /*! |
| * brief Get the remaining bytes to be received. |
| * |
| * param base FlexIO I2S peripheral base address. |
| * param handle FlexIO I2S DMA handle pointer. |
| * param count Bytes received. |
| * retval kStatus_Success Succeed get the transfer count. |
| * retval kStatus_NoTransferInProgress There is not a non-blocking transaction currently in progress. |
| */ |
| status_t FLEXIO_I2S_TransferGetReceiveCountEDMA(FLEXIO_I2S_Type *base, flexio_i2s_edma_handle_t *handle, size_t *count) |
| { |
| assert(handle); |
| |
| status_t status = kStatus_Success; |
| |
| if (handle->state != kFLEXIO_I2S_Busy) |
| { |
| status = kStatus_NoTransferInProgress; |
| } |
| else |
| { |
| *count = handle->transferSize[handle->queueDriver] - |
| (uint32_t)handle->nbytes * |
| EDMA_GetRemainingMajorLoopCount(handle->dmaHandle->base, handle->dmaHandle->channel); |
| } |
| |
| return status; |
| } |