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rt-thread-official/bsp/lpc54114-lite/Libraries/devices/LPC54114/drivers/fsl_usart_dma.c

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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_usart.h"
#include "fsl_device_registers.h"
#include "fsl_dma.h"
#include "fsl_flexcomm.h"
#include "fsl_usart_dma.h"
/* Component ID definition, used by tools. */
#ifndef FSL_COMPONENT_ID
#define FSL_COMPONENT_ID "platform.drivers.flexcomm_usart_dma"
#endif
/*<! Structure definition for uart_dma_handle_t. The structure is private. */
typedef struct _usart_dma_private_handle
{
USART_Type *base;
usart_dma_handle_t *handle;
} usart_dma_private_handle_t;
enum _usart_transfer_states
{
kUSART_TxIdle, /* TX idle. */
kUSART_TxBusy, /* TX busy. */
kUSART_RxIdle, /* RX idle. */
kUSART_RxBusy /* RX busy. */
};
/*<! Private handle only used for internally. */
static usart_dma_private_handle_t s_dmaPrivateHandle[FSL_FEATURE_SOC_USART_COUNT];
/*******************************************************************************
* Prototypes
******************************************************************************/
static void USART_TransferSendDMACallback(dma_handle_t *handle, void *param, bool transferDone, uint32_t intmode)
{
assert(handle);
assert(param);
usart_dma_private_handle_t *usartPrivateHandle = (usart_dma_private_handle_t *)param;
/* Disable UART TX DMA. */
USART_EnableTxDMA(usartPrivateHandle->base, false);
usartPrivateHandle->handle->txState = kUSART_TxIdle;
if (usartPrivateHandle->handle->callback)
{
usartPrivateHandle->handle->callback(usartPrivateHandle->base, usartPrivateHandle->handle, kStatus_USART_TxIdle,
usartPrivateHandle->handle->userData);
}
}
static void USART_TransferReceiveDMACallback(dma_handle_t *handle, void *param, bool transferDone, uint32_t intmode)
{
assert(handle);
assert(param);
usart_dma_private_handle_t *usartPrivateHandle = (usart_dma_private_handle_t *)param;
/* Disable UART RX DMA. */
USART_EnableRxDMA(usartPrivateHandle->base, false);
usartPrivateHandle->handle->rxState = kUSART_RxIdle;
if (usartPrivateHandle->handle->callback)
{
usartPrivateHandle->handle->callback(usartPrivateHandle->base, usartPrivateHandle->handle, kStatus_USART_RxIdle,
usartPrivateHandle->handle->userData);
}
}
status_t USART_TransferCreateHandleDMA(USART_Type *base,
usart_dma_handle_t *handle,
usart_dma_transfer_callback_t callback,
void *userData,
dma_handle_t *txDmaHandle,
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;
}
instance = USART_GetInstance(base);
memset(handle, 0, sizeof(*handle));
/* assign 'base' and 'handle' */
s_dmaPrivateHandle[instance].base = base;
s_dmaPrivateHandle[instance].handle = handle;
/* set tx/rx 'idle' state */
handle->rxState = kUSART_RxIdle;
handle->txState = kUSART_TxIdle;
handle->callback = callback;
handle->userData = userData;
handle->rxDmaHandle = rxDmaHandle;
handle->txDmaHandle = txDmaHandle;
/* Configure TX. */
if (txDmaHandle)
{
DMA_SetCallback(txDmaHandle, USART_TransferSendDMACallback, &s_dmaPrivateHandle[instance]);
}
/* Configure RX. */
if (rxDmaHandle)
{
DMA_SetCallback(rxDmaHandle, USART_TransferReceiveDMACallback, &s_dmaPrivateHandle[instance]);
}
return kStatus_Success;
}
status_t USART_TransferSendDMA(USART_Type *base, usart_dma_handle_t *handle, usart_transfer_t *xfer)
{
assert(handle);
assert(handle->txDmaHandle);
assert(xfer);
assert(xfer->data);
assert(xfer->dataSize);
dma_transfer_config_t xferConfig;
status_t status;
/* If previous TX not finished. */
if (kUSART_TxBusy == handle->txState)
{
status = kStatus_USART_TxBusy;
}
else
{
handle->txState = kUSART_TxBusy;
handle->txDataSizeAll = xfer->dataSize;
/* Enable DMA request from txFIFO */
USART_EnableTxDMA(base, true);
/* Prepare transfer. */
DMA_PrepareTransfer(&xferConfig, xfer->data, ((void *)((uint32_t)&base->FIFOWR)), sizeof(uint8_t),
xfer->dataSize, kDMA_MemoryToPeripheral, NULL);
/* Submit transfer. */
DMA_SubmitTransfer(handle->txDmaHandle, &xferConfig);
DMA_StartTransfer(handle->txDmaHandle);
status = kStatus_Success;
}
return status;
}
status_t USART_TransferReceiveDMA(USART_Type *base, usart_dma_handle_t *handle, usart_transfer_t *xfer)
{
assert(handle);
assert(handle->rxDmaHandle);
assert(xfer);
assert(xfer->data);
assert(xfer->dataSize);
dma_transfer_config_t xferConfig;
status_t status;
/* If previous RX not finished. */
if (kUSART_RxBusy == handle->rxState)
{
status = kStatus_USART_RxBusy;
}
else
{
handle->rxState = kUSART_RxBusy;
handle->rxDataSizeAll = xfer->dataSize;
/* Enable DMA request from rxFIFO */
USART_EnableRxDMA(base, true);
/* Prepare transfer. */
DMA_PrepareTransfer(&xferConfig, ((void *)((uint32_t)&base->FIFORD)), xfer->data, sizeof(uint8_t),
xfer->dataSize, kDMA_PeripheralToMemory, NULL);
/* Submit transfer. */
DMA_SubmitTransfer(handle->rxDmaHandle, &xferConfig);
DMA_StartTransfer(handle->rxDmaHandle);
status = kStatus_Success;
}
return status;
}
void USART_TransferAbortSendDMA(USART_Type *base, usart_dma_handle_t *handle)
{
assert(NULL != handle);
assert(NULL != handle->txDmaHandle);
/* Stop transfer. */
DMA_AbortTransfer(handle->txDmaHandle);
handle->txState = kUSART_TxIdle;
}
void USART_TransferAbortReceiveDMA(USART_Type *base, usart_dma_handle_t *handle)
{
assert(NULL != handle);
assert(NULL != handle->rxDmaHandle);
/* Stop transfer. */
DMA_AbortTransfer(handle->rxDmaHandle);
handle->rxState = kUSART_RxIdle;
}
status_t USART_TransferGetReceiveCountDMA(USART_Type *base, usart_dma_handle_t *handle, uint32_t *count)
{
assert(handle);
assert(handle->rxDmaHandle);
assert(count);
if (kUSART_RxIdle == handle->rxState)
{
return kStatus_NoTransferInProgress;
}
*count = handle->rxDataSizeAll - DMA_GetRemainingBytes(handle->rxDmaHandle->base, handle->rxDmaHandle->channel);
return kStatus_Success;
}
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