620 lines
20 KiB
C
620 lines
20 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include "fsl_sai_edma.h"
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/* Component ID definition, used by tools. */
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#ifndef FSL_COMPONENT_ID
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#define FSL_COMPONENT_ID "platform.drivers.sai_edma"
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#endif
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/*******************************************************************************
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* Definitations
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******************************************************************************/
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/* Used for 32byte aligned */
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#define STCD_ADDR(address) (edma_tcd_t *)(((uint32_t)(address) + 32) & ~0x1FU)
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static I2S_Type *const s_saiBases[] = I2S_BASE_PTRS;
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/*<! Structure definition for uart_edma_private_handle_t. The structure is private. */
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typedef struct _sai_edma_private_handle
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{
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I2S_Type *base;
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sai_edma_handle_t *handle;
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} sai_edma_private_handle_t;
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enum _sai_edma_transfer_state
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{
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kSAI_Busy = 0x0U, /*!< SAI is busy */
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kSAI_Idle, /*!< Transfer is done. */
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};
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/*<! Private handle only used for internally. */
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static sai_edma_private_handle_t s_edmaPrivateHandle[ARRAY_SIZE(s_saiBases)][2];
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*!
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* @brief Get the instance number for SAI.
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*
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* @param base SAI base pointer.
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*/
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static uint32_t SAI_GetInstance(I2S_Type *base);
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/*!
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* @brief SAI EDMA callback for send.
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*
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* @param handle pointer to sai_edma_handle_t structure which stores the transfer state.
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* @param userData Parameter for user callback.
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* @param done If the DMA transfer finished.
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* @param tcds The TCD index.
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*/
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static void SAI_TxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds);
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/*!
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* @brief SAI EDMA callback for receive.
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*
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* @param handle pointer to sai_edma_handle_t structure which stores the transfer state.
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* @param userData Parameter for user callback.
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* @param done If the DMA transfer finished.
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* @param tcds The TCD index.
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*/
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static void SAI_RxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds);
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/*******************************************************************************
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* Code
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******************************************************************************/
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static uint32_t SAI_GetInstance(I2S_Type *base)
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{
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uint32_t instance;
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/* Find the instance index from base address mappings. */
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for (instance = 0; instance < ARRAY_SIZE(s_saiBases); instance++)
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{
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if (s_saiBases[instance] == base)
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{
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break;
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}
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}
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assert(instance < ARRAY_SIZE(s_saiBases));
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return instance;
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}
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static void SAI_TxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds)
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{
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sai_edma_private_handle_t *privHandle = (sai_edma_private_handle_t *)userData;
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sai_edma_handle_t *saiHandle = privHandle->handle;
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/* If finished a blcok, call the callback function */
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memset(&saiHandle->saiQueue[saiHandle->queueDriver], 0, sizeof(sai_transfer_t));
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saiHandle->queueDriver = (saiHandle->queueDriver + 1) % SAI_XFER_QUEUE_SIZE;
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if (saiHandle->callback)
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{
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(saiHandle->callback)(privHandle->base, saiHandle, kStatus_SAI_TxIdle, saiHandle->userData);
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}
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/* If all data finished, just stop the transfer */
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if (saiHandle->saiQueue[saiHandle->queueDriver].data == NULL)
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{
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/* Disable DMA enable bit */
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SAI_TxEnableDMA(privHandle->base, kSAI_FIFORequestDMAEnable, false);
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EDMA_AbortTransfer(handle);
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}
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}
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static void SAI_RxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds)
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{
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sai_edma_private_handle_t *privHandle = (sai_edma_private_handle_t *)userData;
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sai_edma_handle_t *saiHandle = privHandle->handle;
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/* If finished a blcok, call the callback function */
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memset(&saiHandle->saiQueue[saiHandle->queueDriver], 0, sizeof(sai_transfer_t));
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saiHandle->queueDriver = (saiHandle->queueDriver + 1) % SAI_XFER_QUEUE_SIZE;
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if (saiHandle->callback)
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{
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(saiHandle->callback)(privHandle->base, saiHandle, kStatus_SAI_RxIdle, saiHandle->userData);
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}
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/* If all data finished, just stop the transfer */
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if (saiHandle->saiQueue[saiHandle->queueDriver].data == NULL)
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{
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/* Disable DMA enable bit */
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SAI_RxEnableDMA(privHandle->base, kSAI_FIFORequestDMAEnable, false);
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EDMA_AbortTransfer(handle);
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}
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}
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/*!
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* brief Initializes the SAI eDMA handle.
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*
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* This function initializes the SAI master DMA handle, which can be used for other SAI master transactional APIs.
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* Usually, for a specified SAI instance, call this API once to get the initialized handle.
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*
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* param base SAI base pointer.
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* param handle SAI eDMA handle pointer.
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* param base SAI peripheral base address.
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* param callback Pointer to user callback function.
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* param userData User parameter passed to the callback function.
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* param dmaHandle eDMA handle pointer, this handle shall be static allocated by users.
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*/
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void SAI_TransferTxCreateHandleEDMA(
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I2S_Type *base, sai_edma_handle_t *handle, sai_edma_callback_t callback, void *userData, edma_handle_t *dmaHandle)
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{
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assert(handle && dmaHandle);
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uint32_t instance = SAI_GetInstance(base);
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/* Zero the handle */
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memset(handle, 0, sizeof(*handle));
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/* Set sai base to handle */
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handle->dmaHandle = dmaHandle;
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handle->callback = callback;
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handle->userData = userData;
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/* Set SAI state to idle */
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handle->state = kSAI_Idle;
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s_edmaPrivateHandle[instance][0].base = base;
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s_edmaPrivateHandle[instance][0].handle = handle;
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/* Need to use scatter gather */
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EDMA_InstallTCDMemory(dmaHandle, (edma_tcd_t *)(STCD_ADDR(handle->tcd)), SAI_XFER_QUEUE_SIZE);
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/* Install callback for Tx dma channel */
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EDMA_SetCallback(dmaHandle, SAI_TxEDMACallback, &s_edmaPrivateHandle[instance][0]);
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}
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/*!
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* brief Initializes the SAI Rx eDMA handle.
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*
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* This function initializes the SAI slave DMA handle, which can be used for other SAI master transactional APIs.
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* Usually, for a specified SAI instance, call this API once to get the initialized handle.
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*
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* param base SAI base pointer.
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* param handle SAI eDMA handle pointer.
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* param base SAI peripheral base address.
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* param callback Pointer to user callback function.
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* param userData User parameter passed to the callback function.
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* param dmaHandle eDMA handle pointer, this handle shall be static allocated by users.
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*/
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void SAI_TransferRxCreateHandleEDMA(
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I2S_Type *base, sai_edma_handle_t *handle, sai_edma_callback_t callback, void *userData, edma_handle_t *dmaHandle)
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{
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assert(handle && dmaHandle);
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uint32_t instance = SAI_GetInstance(base);
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/* Zero the handle */
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memset(handle, 0, sizeof(*handle));
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/* Set sai base to handle */
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handle->dmaHandle = dmaHandle;
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handle->callback = callback;
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handle->userData = userData;
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/* Set SAI state to idle */
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handle->state = kSAI_Idle;
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s_edmaPrivateHandle[instance][1].base = base;
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s_edmaPrivateHandle[instance][1].handle = handle;
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/* Need to use scatter gather */
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EDMA_InstallTCDMemory(dmaHandle, STCD_ADDR(handle->tcd), SAI_XFER_QUEUE_SIZE);
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/* Install callback for Tx dma channel */
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EDMA_SetCallback(dmaHandle, SAI_RxEDMACallback, &s_edmaPrivateHandle[instance][1]);
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}
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/*!
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* brief Configures the SAI Tx audio format.
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*
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* The audio format can be changed at run-time. This function configures the sample rate and audio data
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* format to be transferred. This function also sets the eDMA parameter according to formatting requirements.
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*
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* param base SAI base pointer.
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* param handle SAI eDMA handle pointer.
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* param format Pointer to SAI audio data format structure.
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* param mclkSourceClockHz SAI master clock source frequency in Hz.
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* param bclkSourceClockHz SAI bit clock source frequency in Hz. If bit clock source is master
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* clock, this value should equals to masterClockHz in format.
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* retval kStatus_Success Audio format set successfully.
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* retval kStatus_InvalidArgument The input argument is invalid.
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*/
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void SAI_TransferTxSetFormatEDMA(I2S_Type *base,
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sai_edma_handle_t *handle,
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sai_transfer_format_t *format,
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uint32_t mclkSourceClockHz,
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uint32_t bclkSourceClockHz)
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{
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assert(handle && format);
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/* Configure the audio format to SAI registers */
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SAI_TxSetFormat(base, format, mclkSourceClockHz, bclkSourceClockHz);
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/* Get the tranfer size from format, this should be used in EDMA configuration */
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if (format->bitWidth == 24U)
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{
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handle->bytesPerFrame = 4U;
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}
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else
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{
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handle->bytesPerFrame = format->bitWidth / 8U;
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}
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/* Update the data channel SAI used */
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handle->channel = format->channel;
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/* Clear the channel enable bits unitl do a send/receive */
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base->TCR3 &= ~I2S_TCR3_TCE_MASK;
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#if defined(FSL_FEATURE_SAI_FIFO_COUNT) && (FSL_FEATURE_SAI_FIFO_COUNT > 1)
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handle->count = FSL_FEATURE_SAI_FIFO_COUNT - format->watermark;
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#else
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handle->count = 1U;
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#endif /* FSL_FEATURE_SAI_FIFO_COUNT */
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}
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/*!
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* brief Configures the SAI Rx audio format.
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*
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* The audio format can be changed at run-time. This function configures the sample rate and audio data
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* format to be transferred. This function also sets the eDMA parameter according to formatting requirements.
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*
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* param base SAI base pointer.
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* param handle SAI eDMA handle pointer.
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* param format Pointer to SAI audio data format structure.
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* param mclkSourceClockHz SAI master clock source frequency in Hz.
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* param bclkSourceClockHz SAI bit clock source frequency in Hz. If a bit clock source is the master
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* clock, this value should equal to masterClockHz in format.
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* retval kStatus_Success Audio format set successfully.
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* retval kStatus_InvalidArgument The input argument is invalid.
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*/
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void SAI_TransferRxSetFormatEDMA(I2S_Type *base,
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sai_edma_handle_t *handle,
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sai_transfer_format_t *format,
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uint32_t mclkSourceClockHz,
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uint32_t bclkSourceClockHz)
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{
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assert(handle && format);
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/* Configure the audio format to SAI registers */
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SAI_RxSetFormat(base, format, mclkSourceClockHz, bclkSourceClockHz);
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/* Get the tranfer size from format, this should be used in EDMA configuration */
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if (format->bitWidth == 24U)
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{
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handle->bytesPerFrame = 4U;
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}
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else
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{
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handle->bytesPerFrame = format->bitWidth / 8U;
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}
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/* Update the data channel SAI used */
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handle->channel = format->channel;
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/* Clear the channel enable bits unitl do a send/receive */
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base->RCR3 &= ~I2S_RCR3_RCE_MASK;
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#if defined(FSL_FEATURE_SAI_FIFO_COUNT) && (FSL_FEATURE_SAI_FIFO_COUNT > 1)
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handle->count = format->watermark;
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#else
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handle->count = 1U;
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#endif /* FSL_FEATURE_SAI_FIFO_COUNT */
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}
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/*!
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* brief Performs a non-blocking SAI transfer using DMA.
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*
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* note This interface returns immediately after the transfer initiates. Call
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* SAI_GetTransferStatus to poll the transfer status and check whether the SAI transfer is finished.
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*
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* param base SAI base pointer.
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* param handle SAI eDMA handle pointer.
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* param xfer Pointer to the DMA transfer structure.
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* retval kStatus_Success Start a SAI eDMA send successfully.
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* retval kStatus_InvalidArgument The input argument is invalid.
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* retval kStatus_TxBusy SAI is busy sending data.
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*/
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status_t SAI_TransferSendEDMA(I2S_Type *base, sai_edma_handle_t *handle, sai_transfer_t *xfer)
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{
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assert(handle && xfer);
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edma_transfer_config_t config = {0};
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uint32_t destAddr = SAI_TxGetDataRegisterAddress(base, handle->channel);
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/* Check if input parameter invalid */
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if ((xfer->data == NULL) || (xfer->dataSize == 0U))
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{
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return kStatus_InvalidArgument;
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}
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if (handle->saiQueue[handle->queueUser].data)
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{
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return kStatus_SAI_QueueFull;
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}
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/* Change the state of handle */
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handle->state = kSAI_Busy;
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/* Update the queue state */
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handle->transferSize[handle->queueUser] = xfer->dataSize;
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handle->saiQueue[handle->queueUser].data = xfer->data;
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handle->saiQueue[handle->queueUser].dataSize = xfer->dataSize;
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handle->queueUser = (handle->queueUser + 1) % SAI_XFER_QUEUE_SIZE;
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/* Prepare edma configure */
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EDMA_PrepareTransfer(&config, xfer->data, handle->bytesPerFrame, (void *)destAddr, handle->bytesPerFrame,
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handle->count * handle->bytesPerFrame, xfer->dataSize, kEDMA_MemoryToPeripheral);
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/* Store the initially configured eDMA minor byte transfer count into the SAI handle */
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handle->nbytes = handle->count * handle->bytesPerFrame;
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EDMA_SubmitTransfer(handle->dmaHandle, &config);
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/* Start DMA transfer */
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EDMA_StartTransfer(handle->dmaHandle);
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/* Enable DMA enable bit */
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SAI_TxEnableDMA(base, kSAI_FIFORequestDMAEnable, true);
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/* Enable SAI Tx clock */
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SAI_TxEnable(base, true);
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/* Enable the channel FIFO */
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base->TCR3 |= I2S_TCR3_TCE(1U << handle->channel);
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return kStatus_Success;
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}
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/*!
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* brief Performs a non-blocking SAI receive using eDMA.
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*
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* note This interface returns immediately after the transfer initiates. Call
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* the SAI_GetReceiveRemainingBytes to poll the transfer status and check whether the SAI transfer is finished.
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*
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* param base SAI base pointer
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* param handle SAI eDMA handle pointer.
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* param xfer Pointer to DMA transfer structure.
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* retval kStatus_Success Start a SAI eDMA receive successfully.
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* retval kStatus_InvalidArgument The input argument is invalid.
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* retval kStatus_RxBusy SAI is busy receiving data.
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*/
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status_t SAI_TransferReceiveEDMA(I2S_Type *base, sai_edma_handle_t *handle, sai_transfer_t *xfer)
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{
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assert(handle && xfer);
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edma_transfer_config_t config = {0};
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uint32_t srcAddr = SAI_RxGetDataRegisterAddress(base, handle->channel);
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/* Check if input parameter invalid */
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if ((xfer->data == NULL) || (xfer->dataSize == 0U))
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{
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return kStatus_InvalidArgument;
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}
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if (handle->saiQueue[handle->queueUser].data)
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{
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return kStatus_SAI_QueueFull;
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}
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/* Change the state of handle */
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handle->state = kSAI_Busy;
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/* Update queue state */
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handle->transferSize[handle->queueUser] = xfer->dataSize;
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handle->saiQueue[handle->queueUser].data = xfer->data;
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handle->saiQueue[handle->queueUser].dataSize = xfer->dataSize;
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handle->queueUser = (handle->queueUser + 1) % SAI_XFER_QUEUE_SIZE;
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/* Prepare edma configure */
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EDMA_PrepareTransfer(&config, (void *)srcAddr, handle->bytesPerFrame, xfer->data, handle->bytesPerFrame,
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handle->count * handle->bytesPerFrame, xfer->dataSize, kEDMA_PeripheralToMemory);
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/* Store the initially configured eDMA minor byte transfer count into the SAI handle */
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handle->nbytes = handle->count * handle->bytesPerFrame;
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EDMA_SubmitTransfer(handle->dmaHandle, &config);
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/* Start DMA transfer */
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EDMA_StartTransfer(handle->dmaHandle);
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/* Enable DMA enable bit */
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SAI_RxEnableDMA(base, kSAI_FIFORequestDMAEnable, true);
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/* Enable the channel FIFO */
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base->RCR3 |= I2S_RCR3_RCE(1U << handle->channel);
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/* Enable SAI Rx clock */
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SAI_RxEnable(base, true);
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return kStatus_Success;
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}
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/*!
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* brief Aborts a SAI transfer using eDMA.
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*
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* This function only aborts the current transfer slots, the other transfer slots' information still kept
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* in the handler. If users want to terminate all transfer slots, just call SAI_TransferTerminateSendEDMA.
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*
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* param base SAI base pointer.
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* param handle SAI eDMA handle pointer.
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*/
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void SAI_TransferAbortSendEDMA(I2S_Type *base, sai_edma_handle_t *handle)
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{
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assert(handle);
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/* Disable dma */
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EDMA_AbortTransfer(handle->dmaHandle);
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/* Disable the channel FIFO */
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base->TCR3 &= ~I2S_TCR3_TCE_MASK;
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/* Disable DMA enable bit */
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SAI_TxEnableDMA(base, kSAI_FIFORequestDMAEnable, false);
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/* Disable Tx */
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SAI_TxEnable(base, false);
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/* Reset the FIFO pointer, at the same time clear all error flags if set */
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base->TCSR |= (I2S_TCSR_FR_MASK | I2S_TCSR_SR_MASK);
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base->TCSR &= ~I2S_TCSR_SR_MASK;
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/* Handle the queue index */
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memset(&handle->saiQueue[handle->queueDriver], 0, sizeof(sai_transfer_t));
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handle->queueDriver = (handle->queueDriver + 1) % SAI_XFER_QUEUE_SIZE;
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/* Set the handle state */
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handle->state = kSAI_Idle;
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}
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/*!
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* brief Aborts a SAI receive using eDMA.
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*
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* 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;
|
|
}
|