/* * Copyright (c) 2015, Freescale Semiconductor, Inc. * Copyright 2016-2018 NXP * All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include "fsl_flexio_i2s_dma.h" /* Component ID definition, used by tools. */ #ifndef FSL_COMPONENT_ID #define FSL_COMPONENT_ID "platform.drivers.flexio_i2s_dma" #endif /******************************************************************************* * Definitations ******************************************************************************/ /*handle; /* If finished a block, call the callback function */ (void)memset(&flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver], 0, sizeof(flexio_i2s_transfer_t)); flexio_i2sHandle->queueDriver = (flexio_i2sHandle->queueDriver + 1U) % FLEXIO_I2S_XFER_QUEUE_SIZE; if (flexio_i2sHandle->callback != NULL) { (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_TransferAbortSendDMA(privHandle->base, flexio_i2sHandle); } } static void FLEXIO_I2S_RxDMACallback(dma_handle_t *handle, void *userData) { flexio_i2s_dma_private_handle_t *privHandle = (flexio_i2s_dma_private_handle_t *)userData; flexio_i2s_dma_handle_t *flexio_i2sHandle = privHandle->handle; /* If finished a block, call the callback function */ (void)memset(&flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver], 0, sizeof(flexio_i2s_transfer_t)); flexio_i2sHandle->queueDriver = (flexio_i2sHandle->queueDriver + 1U) % FLEXIO_I2S_XFER_QUEUE_SIZE; if (flexio_i2sHandle->callback != NULL) { (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_TransferAbortReceiveDMA(privHandle->base, flexio_i2sHandle); } } /*! * brief Initializes the FlexIO I2S DMA 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 DMA handle pointer. * param callback FlexIO I2S DMA callback function called while finished a block. * param userData User parameter for callback. * param dmaHandle DMA handle for FlexIO I2S. This handle is a static value allocated by users. */ void FLEXIO_I2S_TransferTxCreateHandleDMA(FLEXIO_I2S_Type *base, flexio_i2s_dma_handle_t *handle, flexio_i2s_dma_callback_t callback, void *userData, dma_handle_t *dmaHandle) { assert((handle != NULL) && (dmaHandle != NULL)); /* Zero the handle */ (void)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 = (uint32_t)kFLEXIO_I2S_Idle; s_dmaPrivateHandle[0].base = base; s_dmaPrivateHandle[0].handle = handle; /* Install callback for Tx dma channel */ DMA_SetCallback(dmaHandle, FLEXIO_I2S_TxDMACallback, &s_dmaPrivateHandle[0]); } /*! * brief Initializes the FlexIO I2S Rx DMA 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 DMA handle pointer. * param callback FlexIO I2S DMA callback function called while finished a block. * param userData User parameter for callback. * param dmaHandle DMA handle for FlexIO I2S. This handle is a static value allocated by users. */ void FLEXIO_I2S_TransferRxCreateHandleDMA(FLEXIO_I2S_Type *base, flexio_i2s_dma_handle_t *handle, flexio_i2s_dma_callback_t callback, void *userData, dma_handle_t *dmaHandle) { assert((handle != NULL) && (dmaHandle != NULL)); /* Zero the handle */ (void)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 = (uint32_t)kFLEXIO_I2S_Idle; s_dmaPrivateHandle[1].base = base; s_dmaPrivateHandle[1].handle = handle; /* Install callback for Tx dma channel */ DMA_SetCallback(dmaHandle, FLEXIO_I2S_RxDMACallback, &s_dmaPrivateHandle[1]); } /*! * brief Configures the FlexIO I2S Tx audio format. * * Audio format can be changed at run-time of FlexIO I2S. This function configures the sample rate and audio data * format to be transferred. This function also sets the DMA parameter according to the format. * * param base FlexIO I2S peripheral base address. * param handle FlexIO I2S DMA 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_TransferSetFormatDMA(FLEXIO_I2S_Type *base, flexio_i2s_dma_handle_t *handle, flexio_i2s_format_t *format, uint32_t srcClock_Hz) { assert((handle != NULL) && (format != NULL)); /* Configure the audio format to FLEXIO I2S registers */ if (srcClock_Hz != 0U) { /* It is master */ FLEXIO_I2S_MasterSetFormat(base, format, srcClock_Hz); } else { FLEXIO_I2S_SlaveSetFormat(base, format); } /* Get the transfer size from format, this should be used in DMA configuration */ handle->bytesPerFrame = format->bitWidth / 8U; } /*! * brief Performs a non-blocking FlexIO I2S transfer using DMA. * * note This interface returns immediately after transfer initiates. Call * FLEXIO_I2S_GetTransferStatus to poll the transfer status and check whether FLEXIO I2S transfer 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 DMA send successfully. * retval kStatus_InvalidArgument The input arguments is invalid. * retval kStatus_TxBusy FlexIO I2S is busy sending data. */ status_t FLEXIO_I2S_TransferSendDMA(FLEXIO_I2S_Type *base, flexio_i2s_dma_handle_t *handle, flexio_i2s_transfer_t *xfer) { assert((handle != NULL) && (xfer != NULL)); dma_transfer_config_t config = {0}; uint32_t destAddr = FLEXIO_I2S_TxGetDataRegisterAddress(base) + (4UL - handle->bytesPerFrame); /* Check if input parameter invalid */ if ((xfer->data == NULL) || (xfer->dataSize == 0U)) { return kStatus_InvalidArgument; } if (handle->queue[handle->queueUser].data != NULL) { return kStatus_FLEXIO_I2S_QueueFull; } /* Change the state of handle */ handle->state = (uint32_t)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 + 1U) % FLEXIO_I2S_XFER_QUEUE_SIZE; DMA_PrepareTransfer(&config, xfer->data, handle->bytesPerFrame, (uint32_t *)destAddr, handle->bytesPerFrame, xfer->dataSize, kDMA_MemoryToPeripheral); /* Configure DMA channel */ (void)DMA_SubmitTransfer(handle->dmaHandle, &config, 1UL); /* Start DMA transfer */ DMA_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 DMA. * * note This interface returns immediately after transfer initiates. Call * FLEXIO_I2S_GetReceiveRemainingBytes to poll the transfer status to 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 DMA receive successfully. * retval kStatus_InvalidArgument The input arguments is invalid. * retval kStatus_RxBusy FlexIO I2S is busy receiving data. */ status_t FLEXIO_I2S_TransferReceiveDMA(FLEXIO_I2S_Type *base, flexio_i2s_dma_handle_t *handle, flexio_i2s_transfer_t *xfer) { assert((handle != NULL) && (xfer != NULL)); dma_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 != NULL) { return kStatus_FLEXIO_I2S_QueueFull; } /* Change the state of handle */ handle->state = (uint32_t)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 + 1U) % FLEXIO_I2S_XFER_QUEUE_SIZE; /* Prepare dma configure */ DMA_PrepareTransfer(&config, (uint32_t *)srcAddr, handle->bytesPerFrame, xfer->data, handle->bytesPerFrame, xfer->dataSize, kDMA_PeripheralToMemory); (void)DMA_SubmitTransfer(handle->dmaHandle, &config, 1UL); /* Start DMA transfer */ DMA_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 DMA. * * param base FlexIO I2S peripheral base address. * param handle FlexIO I2S DMA handle pointer. */ void FLEXIO_I2S_TransferAbortSendDMA(FLEXIO_I2S_Type *base, flexio_i2s_dma_handle_t *handle) { assert(handle != NULL); /* Disable dma */ DMA_AbortTransfer(handle->dmaHandle); /* Disable DMA enable bit */ FLEXIO_I2S_TxEnableDMA(base, false); /* Set the handle state */ handle->state = (uint32_t)kFLEXIO_I2S_Idle; } /*! * brief Aborts a FlexIO I2S receive using DMA. * * param base FlexIO I2S peripheral base address. * param handle FlexIO I2S DMA handle pointer. */ void FLEXIO_I2S_TransferAbortReceiveDMA(FLEXIO_I2S_Type *base, flexio_i2s_dma_handle_t *handle) { assert(handle != NULL); /* Disable dma */ DMA_AbortTransfer(handle->dmaHandle); /* Disable DMA enable bit */ FLEXIO_I2S_RxEnableDMA(base, false); /* Set the handle state */ handle->state = (uint32_t)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_TransferGetSendCountDMA(FLEXIO_I2S_Type *base, flexio_i2s_dma_handle_t *handle, size_t *count) { assert(handle != NULL); status_t status = kStatus_Success; if (handle->state != (uint32_t)kFLEXIO_I2S_Busy) { status = kStatus_NoTransferInProgress; } else { *count = handle->transferSize[handle->queueDriver] - DMA_GetRemainingBytes(handle->dmaHandle->base, handle->dmaHandle->channel); } return status; } /*! * brief Gets 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_TransferGetReceiveCountDMA(FLEXIO_I2S_Type *base, flexio_i2s_dma_handle_t *handle, size_t *count) { assert(handle != NULL); status_t status = kStatus_Success; if (handle->state != (uint32_t)kFLEXIO_I2S_Busy) { status = kStatus_NoTransferInProgress; } else { *count = handle->transferSize[handle->queueDriver] - DMA_GetRemainingBytes(handle->dmaHandle->base, handle->dmaHandle->channel); } return status; }