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- /*
- * The Clear BSD License
- * Copyright (c) 2016, Freescale Semiconductor, Inc.
- * Copyright 2016-2017 NXP
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted (subject to the limitations in the disclaimer below) 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 the copyright holder nor the names of its
- * contributors may be used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
- * 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
- ******************************************************************************/
- /* Component ID definition, used by tools. */
- #ifndef FSL_COMPONENT_ID
- #define FSL_COMPONENT_ID "platform.drivers.dmic_dma"
- #endif
- #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
- ******************************************************************************/
- /*******************************************************************************
- * 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;
- uint32_t srcAddr = (uint32_t)(&base->CHANNEL[dmic_channel].FIFO_DATA);
- /* 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 *)srcAddr, 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;
- }
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