/* * Copyright (c) 2016, Freescale Semiconductor, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * o Redistributions of source code must retain the above copyright notice, this list * of conditions and the following disclaimer. * * o Redistributions in binary form must reproduce the above copyright notice, this * list of conditions and the following disclaimer in the documentation and/or * other materials provided with the distribution. * * o Neither the name of Freescale Semiconductor, Inc. nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "fsl_dmic_dma.h" #include "fsl_dmic.h" /******************************************************************************* * Definitions ******************************************************************************/ #define DMIC_HANDLE_ARRAY_SIZE 1 /*<! Structure definition for dmic_dma_handle_t. The structure is private. */ typedef struct _dmic_dma_private_handle { DMIC_Type *base; dmic_dma_handle_t *handle; } dmic_dma_private_handle_t; /*! @brief DMIC transfer state, which is used for DMIC transactiaonl APIs' internal state. */ enum _dmic_dma_states_t { kDMIC_Idle = 0x0, /*!< DMIC is idle state */ kDMIC_Busy /*!< DMIC is busy tranferring data. */ }; /******************************************************************************* * Prototypes ******************************************************************************/ /*! * @brief Get the DMIC instance from peripheral base address. * * @param base DMIC peripheral base address. * @return DMIC instance. */ extern uint32_t DMIC_GetInstance(DMIC_Type *base); /******************************************************************************* * Variables ******************************************************************************/ /*<! Private handle only used for internally. */ static dmic_dma_private_handle_t s_dmaPrivateHandle[DMIC_HANDLE_ARRAY_SIZE]; /******************************************************************************* * Code ********************************************************************************/ static void DMIC_TransferReceiveDMACallback(dma_handle_t *handle, void *param, bool transferDone, uint32_t intmode) { assert(handle); assert(param); dmic_dma_private_handle_t *dmicPrivateHandle = (dmic_dma_private_handle_t *)param; dmicPrivateHandle->handle->state = kDMIC_Idle; if (dmicPrivateHandle->handle->callback) { dmicPrivateHandle->handle->callback(dmicPrivateHandle->base, dmicPrivateHandle->handle, kStatus_DMIC_Idle, dmicPrivateHandle->handle->userData); } } status_t DMIC_TransferCreateHandleDMA(DMIC_Type *base, dmic_dma_handle_t *handle, dmic_dma_transfer_callback_t callback, void *userData, dma_handle_t *rxDmaHandle) { int32_t instance = 0; /* check 'base' */ assert(!(NULL == base)); if (NULL == base) { return kStatus_InvalidArgument; } /* check 'handle' */ assert(!(NULL == handle)); if (NULL == handle) { return kStatus_InvalidArgument; } /* check DMIC instance by 'base'*/ instance = DMIC_GetInstance(base); assert(!(instance < 0)); if (instance < 0) { return kStatus_InvalidArgument; } memset(handle, 0, sizeof(*handle)); /* assign 'base' and 'handle' */ s_dmaPrivateHandle[instance].base = base; s_dmaPrivateHandle[instance].handle = handle; handle->callback = callback; handle->userData = userData; handle->rxDmaHandle = rxDmaHandle; /* Set DMIC state to idle */ handle->state = kDMIC_Idle; /* Configure RX. */ if (rxDmaHandle) { DMA_SetCallback(rxDmaHandle, DMIC_TransferReceiveDMACallback, &s_dmaPrivateHandle[instance]); } return kStatus_Success; } status_t DMIC_TransferReceiveDMA(DMIC_Type *base, dmic_dma_handle_t *handle, dmic_transfer_t *xfer, uint32_t dmic_channel) { assert(handle); assert(handle->rxDmaHandle); assert(xfer); assert(xfer->data); assert(xfer->dataSize); dma_transfer_config_t xferConfig; status_t status; /* Check if the device is busy. If previous RX not finished.*/ if (handle->state == kDMIC_Busy) { status = kStatus_DMIC_Busy; } else { handle->state = kDMIC_Busy; handle->transferSize = xfer->dataSize; /* Prepare transfer. */ DMA_PrepareTransfer(&xferConfig, (void *)&base->CHANNEL[dmic_channel].FIFO_DATA, xfer->data, sizeof(uint16_t), xfer->dataSize, kDMA_PeripheralToMemory, NULL); /* Submit transfer. */ DMA_SubmitTransfer(handle->rxDmaHandle, &xferConfig); DMA_StartTransfer(handle->rxDmaHandle); status = kStatus_Success; } return status; } void DMIC_TransferAbortReceiveDMA(DMIC_Type *base, dmic_dma_handle_t *handle) { assert(NULL != handle); assert(NULL != handle->rxDmaHandle); /* Stop transfer. */ DMA_AbortTransfer(handle->rxDmaHandle); handle->state = kDMIC_Idle; } status_t DMIC_TransferGetReceiveCountDMA(DMIC_Type *base, dmic_dma_handle_t *handle, uint32_t *count) { assert(handle); assert(handle->rxDmaHandle); assert(count); if (kDMIC_Idle == handle->state) { return kStatus_NoTransferInProgress; } *count = handle->transferSize - DMA_GetRemainingBytes(handle->rxDmaHandle->base, handle->rxDmaHandle->channel); return kStatus_Success; }