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* Copyright (c) 2015, Freescale Semiconductor, Inc.
* Copyright 2016-2017 NXP
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "fsl_sai_edma.h"
/* Component ID definition, used by tools. */
#ifndef FSL_COMPONENT_ID
#define FSL_COMPONENT_ID "platform.drivers.sai_edma"
#endif
/*******************************************************************************
* Definitations
******************************************************************************/
/* Used for 32byte aligned */
#define STCD_ADDR(address) (edma_tcd_t *)(((uint32_t)(address) + 32) & ~0x1FU)
static I2S_Type *const s_saiBases[] = I2S_BASE_PTRS;
/*<! 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[ARRAY_SIZE(s_saiBases)][2];
/*******************************************************************************
* Prototypes
******************************************************************************/
/*!
* @brief Get the instance number for SAI.
*
* @param base SAI base pointer.
*/
static 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 uint32_t SAI_GetInstance(I2S_Type *base)
{
uint32_t instance;
/* Find the instance index from base address mappings. */
for (instance = 0; instance < ARRAY_SIZE(s_saiBases); instance++)
{
if (s_saiBases[instance] == base)
{
break;
}
}
assert(instance < ARRAY_SIZE(s_saiBases));
return instance;
}
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)
{
/* Disable DMA enable bit */
SAI_TxEnableDMA(privHandle->base, kSAI_FIFORequestDMAEnable, false);
EDMA_AbortTransfer(handle);
}
}
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)
{
/* Disable DMA enable bit */
SAI_RxEnableDMA(privHandle->base, kSAI_FIFORequestDMAEnable, false);
EDMA_AbortTransfer(handle);
}
}
/*!
* brief Initializes the SAI eDMA handle.
*
* This function initializes the SAI master DMA handle, which can be used for other SAI master transactional APIs.
* Usually, for a specified SAI instance, call this API once to get the initialized handle.
*
* param base SAI base pointer.
* param handle SAI eDMA handle pointer.
* param base SAI peripheral base address.
* param callback Pointer to user callback function.
* param userData User parameter passed to the callback function.
* param dmaHandle eDMA handle pointer, this handle shall be static allocated by users.
*/
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);
/* Zero the handle */
memset(handle, 0, sizeof(*handle));
/* 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, (edma_tcd_t *)(STCD_ADDR(handle->tcd)), SAI_XFER_QUEUE_SIZE);
/* Install callback for Tx dma channel */
EDMA_SetCallback(dmaHandle, SAI_TxEDMACallback, &s_edmaPrivateHandle[instance][0]);
}
/*!
* brief Initializes the SAI Rx eDMA handle.
*
* This function initializes the SAI slave DMA handle, which can be used for other SAI master transactional APIs.
* Usually, for a specified SAI instance, call this API once to get the initialized handle.
*
* param base SAI base pointer.
* param handle SAI eDMA handle pointer.
* param base SAI peripheral base address.
* param callback Pointer to user callback function.
* param userData User parameter passed to the callback function.
* param dmaHandle eDMA handle pointer, this handle shall be static allocated by users.
*/
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);
/* Zero the handle */
memset(handle, 0, sizeof(*handle));
/* 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]);
}
/*!
* brief Configures the SAI Tx audio format.
*
* The audio format can be changed at run-time. This function configures the sample rate and audio data
* format to be transferred. This function also sets the eDMA parameter according to formatting requirements.
*
* param base SAI base pointer.
* param handle SAI eDMA handle pointer.
* param format Pointer to SAI audio data format structure.
* param mclkSourceClockHz SAI master clock source frequency in Hz.
* param bclkSourceClockHz SAI bit clock source frequency in Hz. If bit clock source is master
* clock, this value should equals to masterClockHz in format.
* retval kStatus_Success Audio format set successfully.
* retval kStatus_InvalidArgument The input argument is invalid.
*/
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 */
if (format->bitWidth == 24U)
{
handle->bytesPerFrame = 4U;
}
else
{
handle->bytesPerFrame = format->bitWidth / 8U;
}
/* Update the data channel SAI used */
handle->channel = format->channel;
/* Clear the channel enable bits unitl do a send/receive */
base->TCR3 &= ~I2S_TCR3_TCE_MASK;
#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 */
}
/*!
* brief Configures the SAI Rx audio format.
*
* The audio format can be changed at run-time. This function configures the sample rate and audio data
* format to be transferred. This function also sets the eDMA parameter according to formatting requirements.
*
* param base SAI base pointer.
* param handle SAI eDMA handle pointer.
* param format Pointer to SAI audio data format structure.
* param mclkSourceClockHz SAI master clock source frequency in Hz.
* param bclkSourceClockHz SAI bit clock source frequency in Hz. If a bit clock source is the master
* clock, this value should equal to masterClockHz in format.
* retval kStatus_Success Audio format set successfully.
* retval kStatus_InvalidArgument The input argument is invalid.
*/
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 */
if (format->bitWidth == 24U)
{
handle->bytesPerFrame = 4U;
}
else
{
handle->bytesPerFrame = format->bitWidth / 8U;
}
/* Update the data channel SAI used */
handle->channel = format->channel;
/* Clear the channel enable bits unitl do a send/receive */
base->RCR3 &= ~I2S_RCR3_RCE_MASK;
#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 */
}
/*!
* brief Performs a non-blocking SAI transfer using DMA.
*
* note This interface returns immediately after the transfer initiates. Call
* SAI_GetTransferStatus to poll the transfer status and check whether the SAI transfer is finished.
*
* param base SAI base pointer.
* param handle SAI eDMA handle pointer.
* param xfer Pointer to the DMA transfer structure.
* retval kStatus_Success Start a SAI eDMA send successfully.
* retval kStatus_InvalidArgument The input argument is invalid.
* retval kStatus_TxBusy SAI is busy sending data.
*/
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);
/* Store the initially configured eDMA minor byte transfer count into the SAI handle */
handle->nbytes = handle->count * handle->bytesPerFrame;
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);
/* Enable the channel FIFO */
base->TCR3 |= I2S_TCR3_TCE(1U << handle->channel);
return kStatus_Success;
}
/*!
* brief Performs a non-blocking SAI receive using eDMA.
*
* note This interface returns immediately after the transfer initiates. Call
* the SAI_GetReceiveRemainingBytes to poll the transfer status and check whether the SAI transfer is finished.
*
* param base SAI base pointer
* param handle SAI eDMA handle pointer.
* param xfer Pointer to DMA transfer structure.
* retval kStatus_Success Start a SAI eDMA receive successfully.
* retval kStatus_InvalidArgument The input argument is invalid.
* retval kStatus_RxBusy SAI is busy receiving data.
*/
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);
/* Store the initially configured eDMA minor byte transfer count into the SAI handle */
handle->nbytes = handle->count * handle->bytesPerFrame;
EDMA_SubmitTransfer(handle->dmaHandle, &config);
/* Start DMA transfer */
EDMA_StartTransfer(handle->dmaHandle);
/* Enable DMA enable bit */
SAI_RxEnableDMA(base, kSAI_FIFORequestDMAEnable, true);
/* Enable the channel FIFO */
base->RCR3 |= I2S_RCR3_RCE(1U << handle->channel);
/* Enable SAI Rx clock */
SAI_RxEnable(base, true);
return kStatus_Success;
}
/*!
* brief Aborts a SAI transfer using eDMA.
*
* This function only aborts the current transfer slots, the other transfer slots' information still kept
* in the handler. If users want to terminate all transfer slots, just call SAI_TransferTerminateSendEDMA.
*
* param base SAI base pointer.
* param handle SAI eDMA handle pointer.
*/
void SAI_TransferAbortSendEDMA(I2S_Type *base, sai_edma_handle_t *handle)
{
assert(handle);
/* Disable dma */
EDMA_AbortTransfer(handle->dmaHandle);
/* Disable the channel FIFO */
base->TCR3 &= ~I2S_TCR3_TCE_MASK;
/* Disable DMA enable bit */
SAI_TxEnableDMA(base, kSAI_FIFORequestDMAEnable, false);
/* Disable Tx */
SAI_TxEnable(base, false);
/* Reset the FIFO pointer, at the same time clear all error flags if set */
base->TCSR |= (I2S_TCSR_FR_MASK | I2S_TCSR_SR_MASK);
base->TCSR &= ~I2S_TCSR_SR_MASK;
/* Handle the queue index */
memset(&handle->saiQueue[handle->queueDriver], 0, sizeof(sai_transfer_t));
handle->queueDriver = (handle->queueDriver + 1) % SAI_XFER_QUEUE_SIZE;
/* Set the handle state */
handle->state = kSAI_Idle;
}
/*!
* brief Aborts a SAI receive using eDMA.
*
* This function only aborts the current transfer slots, the other transfer slots' information still kept
* in the handler. If users want to terminate all transfer slots, just call SAI_TransferTerminateReceiveEDMA.
*
* param base SAI base pointer
* param handle SAI eDMA handle pointer.
*/
void SAI_TransferAbortReceiveEDMA(I2S_Type *base, sai_edma_handle_t *handle)
{
assert(handle);
/* Disable dma */
EDMA_AbortTransfer(handle->dmaHandle);
/* Disable the channel FIFO */
base->RCR3 &= ~I2S_RCR3_RCE_MASK;
/* Disable DMA enable bit */
SAI_RxEnableDMA(base, kSAI_FIFORequestDMAEnable, false);
/* Disable Rx */
SAI_RxEnable(base, false);
/* Reset the FIFO pointer, at the same time clear all error flags if set */
base->RCSR |= (I2S_RCSR_FR_MASK | I2S_RCSR_SR_MASK);
base->RCSR &= ~I2S_RCSR_SR_MASK;
/* Handle the queue index */
memset(&handle->saiQueue[handle->queueDriver], 0, sizeof(sai_transfer_t));
handle->queueDriver = (handle->queueDriver + 1) % SAI_XFER_QUEUE_SIZE;
/* Set the handle state */
handle->state = kSAI_Idle;
}
/*!
* brief Terminate all SAI send.
*
* This function will clear all transfer slots buffered in the sai queue. If users only want to abort the
* current transfer slot, please call SAI_TransferAbortSendEDMA.
*
* param base SAI base pointer.
* param handle SAI eDMA handle pointer.
*/
void SAI_TransferTerminateSendEDMA(I2S_Type *base, sai_edma_handle_t *handle)
{
assert(handle);
/* Abort the current transfer */
SAI_TransferAbortSendEDMA(base, handle);
/* Clear all the internal information */
memset(handle->tcd, 0U, sizeof(handle->tcd));
memset(handle->saiQueue, 0U, sizeof(handle->saiQueue));
memset(handle->transferSize, 0U, sizeof(handle->transferSize));
handle->queueUser = 0U;
handle->queueDriver = 0U;
}
/*!
* brief Terminate all SAI receive.
*
* This function will clear all transfer slots buffered in the sai queue. If users only want to abort the
* current transfer slot, please call SAI_TransferAbortReceiveEDMA.
*
* param base SAI base pointer.
* param handle SAI eDMA handle pointer.
*/
void SAI_TransferTerminateReceiveEDMA(I2S_Type *base, sai_edma_handle_t *handle)
{
assert(handle);
/* Abort the current transfer */
SAI_TransferAbortReceiveEDMA(base, handle);
/* Clear all the internal information */
memset(handle->tcd, 0U, sizeof(handle->tcd));
memset(handle->saiQueue, 0U, sizeof(handle->saiQueue));
memset(handle->transferSize, 0U, sizeof(handle->transferSize));
handle->queueUser = 0U;
handle->queueDriver = 0U;
}
/*!
* brief Gets byte count sent by SAI.
*
* param base SAI base pointer.
* param handle SAI eDMA handle pointer.
* param count Bytes count sent by SAI.
* retval kStatus_Success Succeed get the transfer count.
* retval kStatus_NoTransferInProgress There is no non-blocking transaction in progress.
*/
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] -
(uint32_t)handle->nbytes *
EDMA_GetRemainingMajorLoopCount(handle->dmaHandle->base, handle->dmaHandle->channel));
}
return status;
}
/*!
* brief Gets byte count received by SAI.
*
* param base SAI base pointer
* param handle SAI eDMA handle pointer.
* param count Bytes count received by SAI.
* retval kStatus_Success Succeed get the transfer count.
* retval kStatus_NoTransferInProgress There is no non-blocking transaction in progress.
*/
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] -
(uint32_t)handle->nbytes *
EDMA_GetRemainingMajorLoopCount(handle->dmaHandle->base, handle->dmaHandle->channel));
}
return status;
}
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