diff options
Diffstat (limited to 'drivers/src/fsl_sai_edma.c')
| -rw-r--r-- | drivers/src/fsl_sai_edma.c | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/drivers/src/fsl_sai_edma.c b/drivers/src/fsl_sai_edma.c new file mode 100644 index 0000000..9b1b2f6 --- /dev/null +++ b/drivers/src/fsl_sai_edma.c @@ -0,0 +1,379 @@ +/* + * Copyright (c) 2015, 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_sai_edma.h" + +/******************************************************************************* + * Definitations + ******************************************************************************/ +/* Used for 32byte aligned */ +#define STCD_ADDR(address) (edma_tcd_t *)(((uint32_t)address + 32) & ~0x1FU) + +/*<! Structure definition for uart_edma_private_handle_t. The structure is private. */ +typedef struct _sai_edma_private_handle +{ + I2S_Type *base; + sai_edma_handle_t *handle; +} sai_edma_private_handle_t; + +enum _sai_edma_transfer_state +{ + kSAI_Busy = 0x0U, /*!< SAI is busy */ + kSAI_Idle, /*!< Transfer is done. */ +}; + +/*<! Private handle only used for internally. */ +static sai_edma_private_handle_t s_edmaPrivateHandle[FSL_FEATURE_SOC_I2S_COUNT][2]; + +/******************************************************************************* + * Prototypes + ******************************************************************************/ +/*! + * @brief Get the instance number for SAI. + * + * @param base SAI base pointer. + */ +extern uint32_t SAI_GetInstance(I2S_Type *base); + +/*! + * @brief SAI EDMA callback for send. + * + * @param handle pointer to sai_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 SAI_TxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds); + +/*! + * @brief SAI EDMA callback for receive. + * + * @param handle pointer to sai_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 SAI_RxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds); + +/******************************************************************************* +* Code +******************************************************************************/ +static void SAI_TxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds) +{ + sai_edma_private_handle_t *privHandle = (sai_edma_private_handle_t *)userData; + sai_edma_handle_t *saiHandle = privHandle->handle; + + /* If finished a blcok, call the callback function */ + memset(&saiHandle->saiQueue[saiHandle->queueDriver], 0, sizeof(sai_transfer_t)); + saiHandle->queueDriver = (saiHandle->queueDriver + 1) % SAI_XFER_QUEUE_SIZE; + if (saiHandle->callback) + { + (saiHandle->callback)(privHandle->base, saiHandle, kStatus_SAI_TxIdle, saiHandle->userData); + } + + /* If all data finished, just stop the transfer */ + if (saiHandle->saiQueue[saiHandle->queueDriver].data == NULL) + { + SAI_TransferAbortSendEDMA(privHandle->base, saiHandle); + } +} + +static void SAI_RxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds) +{ + sai_edma_private_handle_t *privHandle = (sai_edma_private_handle_t *)userData; + sai_edma_handle_t *saiHandle = privHandle->handle; + + /* If finished a blcok, call the callback function */ + memset(&saiHandle->saiQueue[saiHandle->queueDriver], 0, sizeof(sai_transfer_t)); + saiHandle->queueDriver = (saiHandle->queueDriver + 1) % SAI_XFER_QUEUE_SIZE; + if (saiHandle->callback) + { + (saiHandle->callback)(privHandle->base, saiHandle, kStatus_SAI_RxIdle, saiHandle->userData); + } + + /* If all data finished, just stop the transfer */ + if (saiHandle->saiQueue[saiHandle->queueDriver].data == NULL) + { + SAI_TransferAbortReceiveEDMA(privHandle->base, saiHandle); + } +} + +void SAI_TransferTxCreateHandleEDMA( + I2S_Type *base, sai_edma_handle_t *handle, sai_edma_callback_t callback, void *userData, edma_handle_t *dmaHandle) +{ + assert(handle && dmaHandle); + + uint32_t instance = SAI_GetInstance(base); + + /* Set sai base to handle */ + handle->dmaHandle = dmaHandle; + handle->callback = callback; + handle->userData = userData; + + /* Set SAI state to idle */ + handle->state = kSAI_Idle; + + s_edmaPrivateHandle[instance][0].base = base; + s_edmaPrivateHandle[instance][0].handle = handle; + + /* Need to use scatter gather */ + EDMA_InstallTCDMemory(dmaHandle, STCD_ADDR(handle->tcd), SAI_XFER_QUEUE_SIZE); + + /* Install callback for Tx dma channel */ + EDMA_SetCallback(dmaHandle, SAI_TxEDMACallback, &s_edmaPrivateHandle[instance][0]); +} + +void SAI_TransferRxCreateHandleEDMA( + I2S_Type *base, sai_edma_handle_t *handle, sai_edma_callback_t callback, void *userData, edma_handle_t *dmaHandle) +{ + assert(handle && dmaHandle); + + uint32_t instance = SAI_GetInstance(base); + + /* Set sai base to handle */ + handle->dmaHandle = dmaHandle; + handle->callback = callback; + handle->userData = userData; + + /* Set SAI state to idle */ + handle->state = kSAI_Idle; + + s_edmaPrivateHandle[instance][1].base = base; + s_edmaPrivateHandle[instance][1].handle = handle; + + /* Need to use scatter gather */ + EDMA_InstallTCDMemory(dmaHandle, STCD_ADDR(handle->tcd), SAI_XFER_QUEUE_SIZE); + + /* Install callback for Tx dma channel */ + EDMA_SetCallback(dmaHandle, SAI_RxEDMACallback, &s_edmaPrivateHandle[instance][1]); +} + +void SAI_TransferTxSetFormatEDMA(I2S_Type *base, + sai_edma_handle_t *handle, + sai_transfer_format_t *format, + uint32_t mclkSourceClockHz, + uint32_t bclkSourceClockHz) +{ + assert(handle && format); + + /* Configure the audio format to SAI registers */ + SAI_TxSetFormat(base, format, mclkSourceClockHz, bclkSourceClockHz); + + /* Get the tranfer size from format, this should be used in EDMA configuration */ + handle->bytesPerFrame = format->bitWidth / 8U; + + /* Update the data channel SAI used */ + handle->channel = format->channel; +#if defined(FSL_FEATURE_SAI_FIFO_COUNT) && (FSL_FEATURE_SAI_FIFO_COUNT > 1) + handle->count = FSL_FEATURE_SAI_FIFO_COUNT - format->watermark; +#else + handle->count = 1U; +#endif /* FSL_FEATURE_SAI_FIFO_COUNT */ +} + +void SAI_TransferRxSetFormatEDMA(I2S_Type *base, + sai_edma_handle_t *handle, + sai_transfer_format_t *format, + uint32_t mclkSourceClockHz, + uint32_t bclkSourceClockHz) +{ + assert(handle && format); + + /* Configure the audio format to SAI registers */ + SAI_RxSetFormat(base, format, mclkSourceClockHz, bclkSourceClockHz); + + /* Get the tranfer size from format, this should be used in EDMA configuration */ + handle->bytesPerFrame = format->bitWidth / 8U; + + /* Update the data channel SAI used */ + handle->channel = format->channel; + +#if defined(FSL_FEATURE_SAI_FIFO_COUNT) && (FSL_FEATURE_SAI_FIFO_COUNT > 1) + handle->count = format->watermark; +#else + handle->count = 1U; +#endif /* FSL_FEATURE_SAI_FIFO_COUNT */ +} + +status_t SAI_TransferSendEDMA(I2S_Type *base, sai_edma_handle_t *handle, sai_transfer_t *xfer) +{ + assert(handle && xfer); + + edma_transfer_config_t config = {0}; + uint32_t destAddr = SAI_TxGetDataRegisterAddress(base, handle->channel); + + /* Check if input parameter invalid */ + if ((xfer->data == NULL) || (xfer->dataSize == 0U)) + { + return kStatus_InvalidArgument; + } + + if (handle->saiQueue[handle->queueUser].data) + { + return kStatus_SAI_QueueFull; + } + + /* Change the state of handle */ + handle->state = kSAI_Busy; + + /* Update the queue state */ + handle->transferSize[handle->queueUser] = xfer->dataSize; + handle->saiQueue[handle->queueUser].data = xfer->data; + handle->saiQueue[handle->queueUser].dataSize = xfer->dataSize; + handle->queueUser = (handle->queueUser + 1) % SAI_XFER_QUEUE_SIZE; + + /* Prepare edma configure */ + EDMA_PrepareTransfer(&config, xfer->data, handle->bytesPerFrame, (void *)destAddr, handle->bytesPerFrame, + handle->count * handle->bytesPerFrame, xfer->dataSize, kEDMA_MemoryToPeripheral); + + EDMA_SubmitTransfer(handle->dmaHandle, &config); + + /* Start DMA transfer */ + EDMA_StartTransfer(handle->dmaHandle); + + /* Enable DMA enable bit */ + SAI_TxEnableDMA(base, kSAI_FIFORequestDMAEnable, true); + + /* Enable SAI Tx clock */ + SAI_TxEnable(base, true); + + return kStatus_Success; +} + +status_t SAI_TransferReceiveEDMA(I2S_Type *base, sai_edma_handle_t *handle, sai_transfer_t *xfer) +{ + assert(handle && xfer); + + edma_transfer_config_t config = {0}; + uint32_t srcAddr = SAI_RxGetDataRegisterAddress(base, handle->channel); + + /* Check if input parameter invalid */ + if ((xfer->data == NULL) || (xfer->dataSize == 0U)) + { + return kStatus_InvalidArgument; + } + + if (handle->saiQueue[handle->queueUser].data) + { + return kStatus_SAI_QueueFull; + } + + /* Change the state of handle */ + handle->state = kSAI_Busy; + + /* Update queue state */ + handle->transferSize[handle->queueUser] = xfer->dataSize; + handle->saiQueue[handle->queueUser].data = xfer->data; + handle->saiQueue[handle->queueUser].dataSize = xfer->dataSize; + handle->queueUser = (handle->queueUser + 1) % SAI_XFER_QUEUE_SIZE; + + /* Prepare edma configure */ + EDMA_PrepareTransfer(&config, (void *)srcAddr, handle->bytesPerFrame, xfer->data, handle->bytesPerFrame, + handle->count * handle->bytesPerFrame, xfer->dataSize, kEDMA_PeripheralToMemory); + + EDMA_SubmitTransfer(handle->dmaHandle, &config); + + /* Start DMA transfer */ + EDMA_StartTransfer(handle->dmaHandle); + + /* Enable DMA enable bit */ + SAI_RxEnableDMA(base, kSAI_FIFORequestDMAEnable, true); + + /* Enable SAI Rx clock */ + SAI_RxEnable(base, true); + + return kStatus_Success; +} + +void SAI_TransferAbortSendEDMA(I2S_Type *base, sai_edma_handle_t *handle) +{ + assert(handle); + + /* Disable dma */ + EDMA_AbortTransfer(handle->dmaHandle); + + /* Disable DMA enable bit */ + SAI_TxEnableDMA(base, kSAI_FIFORequestDMAEnable, false); + + /* Set the handle state */ + handle->state = kSAI_Idle; +} + +void SAI_TransferAbortReceiveEDMA(I2S_Type *base, sai_edma_handle_t *handle) +{ + assert(handle); + + /* Disable dma */ + EDMA_AbortTransfer(handle->dmaHandle); + + /* Disable DMA enable bit */ + SAI_RxEnableDMA(base, kSAI_FIFORequestDMAEnable, false); + + /* Set the handle state */ + handle->state = kSAI_Idle; +} + +status_t SAI_TransferGetSendCountEDMA(I2S_Type *base, sai_edma_handle_t *handle, size_t *count) +{ + assert(handle); + + status_t status = kStatus_Success; + + if (handle->state != kSAI_Busy) + { + status = kStatus_NoTransferInProgress; + } + else + { + *count = (handle->transferSize[handle->queueDriver] - + EDMA_GetRemainingBytes(handle->dmaHandle->base, handle->dmaHandle->channel)); + } + + return status; +} + +status_t SAI_TransferGetReceiveCountEDMA(I2S_Type *base, sai_edma_handle_t *handle, size_t *count) +{ + assert(handle); + + status_t status = kStatus_Success; + + if (handle->state != kSAI_Busy) + { + status = kStatus_NoTransferInProgress; + } + else + { + *count = (handle->transferSize[handle->queueDriver] - + EDMA_GetRemainingBytes(handle->dmaHandle->base, handle->dmaHandle->channel)); + } + + return status; +} |