251 lines
8.3 KiB
C
251 lines
8.3 KiB
C
/*******************************************************************************
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Copyright (C) Marvell International Ltd. and its affiliates
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This software file (the "File") is owned and distributed by Marvell
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International Ltd. and/or its affiliates ("Marvell") under the following
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alternative licensing terms. Once you have made an election to distribute the
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File under one of the following license alternatives, please (i) delete this
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introductory statement regarding license alternatives, (ii) delete the two
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license alternatives that you have not elected to use and (iii) preserve the
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Marvell copyright notice above.
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********************************************************************************
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Marvell Commercial License Option
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If you received this File from Marvell and you have entered into a commercial
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license agreement (a "Commercial License") with Marvell, the File is licensed
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to you under the terms of the applicable Commercial License.
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********************************************************************************
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Marvell GPL License Option
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If you received this File from Marvell, you may opt to use, redistribute and/or
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modify this File in accordance with the terms and conditions of the General
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Public License Version 2, June 1991 (the "GPL License"), a copy of which is
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available along with the File in the license.txt file or by writing to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
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on the worldwide web at http://www.gnu.org/licenses/gpl.txt.
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THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
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WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
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DISCLAIMED. The GPL License provides additional details about this warranty
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disclaimer.
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********************************************************************************
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Marvell BSD License Option
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If you received this File from Marvell, you may opt to use, redistribute and/or
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modify this File under the following licensing terms.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Marvell nor the names of its contributors may be
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used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************/
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#include "spi/mvSpi.h"
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#include "spi/mvSpiSpec.h"
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#include "spi/mvSpiCmnd.h"
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/*#define MV_DEBUG*/
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#ifdef MV_DEBUG
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#define DB(x) x
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#else
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#define DB(x)
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#endif
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/*******************************************************************************
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* mvSpiReadAndWrite - Read and Write a buffer simultanuousely
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*
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* DESCRIPTION:
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* Transmit and receive a buffer over the SPI in 16bit chunks. If the
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* buffer size is odd, then the last chunk will be 8bits.
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*
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* INPUT:
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* pRxBuff: Pointer to the buffer to write the RX info in
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* pTxBuff: Pointer to the buffer holding the TX info
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* buffSize: length of both the pTxBuff and pRxBuff
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*
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* OUTPUT:
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* pRxBuff: Pointer of the buffer holding the RX data
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*
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* RETURN:
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* Success or Error code.
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*
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*
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*******************************************************************************/
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MV_STATUS mvSpiReadAndWrite(MV_U8* pRxBuff, MV_U8* pTxBuff, MV_U32 buffSize)
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{
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MV_STATUS ret;
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/* check for null parameters */
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if ((pRxBuff == NULL) || (pTxBuff == NULL) || (buffSize == 0))
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{
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mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
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return MV_BAD_PARAM;
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}
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/* First assert the chip select */
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mvSpiCsAssert();
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ret = mvSpiReadWrite(pRxBuff, pTxBuff, buffSize);
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/* Finally deassert the chip select */
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mvSpiCsDeassert();
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return ret;
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}
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/*******************************************************************************
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* mvSpiWriteThenWrite - Serialize a command followed by the data over the TX line
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*
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* DESCRIPTION:
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* Assert the chip select line. Transmit the command buffer followed by
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* the data buffer. Then deassert the CS line.
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*
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* INPUT:
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* pCmndBuff: Pointer to the command buffer to transmit
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* cmndSize: length of the command size
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* pTxDataBuff: Pointer to the data buffer to transmit
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* txDataSize: length of the data buffer
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* Success or Error code.
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*
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*
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*******************************************************************************/
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MV_STATUS mvSpiWriteThenWrite (MV_U8* pCmndBuff, MV_U32 cmndSize, MV_U8* pTxDataBuff,
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MV_U32 txDataSize)
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{
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MV_STATUS ret = MV_OK, tempRet;
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/* check for null parameters */
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#ifndef CONFIG_MARVELL
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if(NULL == pTxDataBuff)
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{
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mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
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return MV_BAD_PARAM;
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}
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#endif
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if (pCmndBuff == NULL)
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{
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mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
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return MV_BAD_PARAM;
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}
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/* First assert the chip select */
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mvSpiCsAssert();
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/* first write the command */
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if ((cmndSize) && (pCmndBuff != NULL))
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{
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if ((tempRet = mvSpiWrite(pCmndBuff, cmndSize)) != MV_OK)
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ret = tempRet;
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}
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/* Then write the data buffer */
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#ifndef CONFIG_MARVELL
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if (txDataSize)
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#else
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if ((txDataSize) && (pTxDataBuff != NULL))
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#endif
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{
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if ((tempRet = mvSpiWrite(pTxDataBuff, txDataSize)) != MV_OK)
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ret = tempRet;
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}
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/* Finally deassert the chip select */
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mvSpiCsDeassert();
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return ret;
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}
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/*******************************************************************************
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* mvSpiWriteThenRead - Serialize a command then read a data buffer
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*
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* DESCRIPTION:
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* Assert the chip select line. Transmit the command buffer then read
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* the data buffer. Then deassert the CS line.
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*
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* INPUT:
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* pCmndBuff: Pointer to the command buffer to transmit
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* cmndSize: length of the command size
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* pRxDataBuff: Pointer to the buffer to read the data in
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* txDataSize: length of the data buffer
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*
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* OUTPUT:
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* pRxDataBuff: Pointer to the buffer holding the data
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*
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* RETURN:
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* Success or Error code.
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*
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*
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*******************************************************************************/
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MV_STATUS mvSpiWriteThenRead (MV_U8* pCmndBuff, MV_U32 cmndSize, MV_U8* pRxDataBuff,
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MV_U32 rxDataSize,MV_U32 dummyBytesToRead)
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{
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MV_STATUS ret = MV_OK, tempRet;
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MV_U8 dummyByte;
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/* check for null parameters */
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if ((pCmndBuff == NULL) && (pRxDataBuff == NULL))
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{
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mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
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return MV_BAD_PARAM;
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}
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/* First assert the chip select */
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mvSpiCsAssert();
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/* first write the command */
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if ((cmndSize) && (pCmndBuff != NULL))
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{
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if ((tempRet = mvSpiWrite(pCmndBuff, cmndSize)) != MV_OK)
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ret = tempRet;
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}
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/* Read dummy bytes before real data. */
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while(dummyBytesToRead)
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{
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mvSpiRead(&dummyByte,1);
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dummyBytesToRead--;
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}
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/* Then write the data buffer */
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if ((rxDataSize) && (pRxDataBuff != NULL))
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{
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if ((tempRet = mvSpiRead(pRxDataBuff, rxDataSize)) != MV_OK)
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ret = tempRet;
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}
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/* Finally deassert the chip select */
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mvSpiCsDeassert();
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return ret;
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}
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