--- /dev/null
+/*******************************************************************************
+Copyright (C) Marvell International Ltd. and its affiliates
+
+This software file (the "File") is owned and distributed by Marvell
+International Ltd. and/or its affiliates ("Marvell") under the following
+alternative licensing terms. Once you have made an election to distribute the
+File under one of the following license alternatives, please (i) delete this
+introductory statement regarding license alternatives, (ii) delete the two
+license alternatives that you have not elected to use and (iii) preserve the
+Marvell copyright notice above.
+
+********************************************************************************
+Marvell Commercial License Option
+
+If you received this File from Marvell and you have entered into a commercial
+license agreement (a "Commercial License") with Marvell, the File is licensed
+to you under the terms of the applicable Commercial License.
+
+********************************************************************************
+Marvell GPL License Option
+
+If you received this File from Marvell, you may opt to use, redistribute and/or
+modify this File in accordance with the terms and conditions of the General
+Public License Version 2, June 1991 (the "GPL License"), a copy of which is
+available along with the File in the license.txt file or by writing to the Free
+Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
+on the worldwide web at http://www.gnu.org/licenses/gpl.txt.
+
+THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
+WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
+DISCLAIMED. The GPL License provides additional details about this warranty
+disclaimer.
+********************************************************************************
+Marvell BSD License Option
+
+If you received this File from Marvell, you may opt to use, redistribute and/or
+modify this File under the following licensing terms.
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ * 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.
+
+ * Neither the name of Marvell 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 OWNER 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 "spi/mvSpi.h"
+#include "spi/mvSpiSpec.h"
+
+/*#define MV_DEBUG*/
+#ifdef MV_DEBUG
+#define DB(x) x
+#else
+#define DB(x)
+#endif
+
+
+/*******************************************************************************
+* mvSpiReadAndWrite - Read and Write a buffer simultanuousely
+*
+* DESCRIPTION:
+* Transmit and receive a buffer over the SPI in 16bit chunks. If the
+* buffer size is odd, then the last chunk will be 8bits.
+*
+* INPUT:
+* pRxBuff: Pointer to the buffer to write the RX info in
+* pTxBuff: Pointer to the buffer holding the TX info
+* buffSize: length of both the pTxBuff and pRxBuff
+*
+* OUTPUT:
+* pRxBuff: Pointer of the buffer holding the RX data
+*
+* RETURN:
+* Success or Error code.
+*
+*
+*******************************************************************************/
+MV_STATUS mvSpiReadAndWrite(MV_U8* pRxBuff, MV_U8* pTxBuff, MV_U32 buffSize)
+{
+ MV_STATUS ret;
+
+ /* check for null parameters */
+ if ((pRxBuff == NULL) || (pTxBuff == NULL) || (buffSize == 0))
+ {
+ mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
+ return MV_BAD_PARAM;
+ }
+
+ /* First assert the chip select */
+ mvSpiCsAssert();
+
+ ret = mvSpiReadWrite(pRxBuff, pTxBuff, buffSize);
+
+ /* Finally deassert the chip select */
+ mvSpiCsDeassert();
+
+ return ret;
+}
+
+/*******************************************************************************
+* mvSpiWriteThenWrite - Serialize a command followed by the data over the TX line
+*
+* DESCRIPTION:
+* Assert the chip select line. Transmit the command buffer followed by
+* the data buffer. Then deassert the CS line.
+*
+* INPUT:
+* pCmndBuff: Pointer to the command buffer to transmit
+* cmndSize: length of the command size
+* pTxDataBuff: Pointer to the data buffer to transmit
+* txDataSize: length of the data buffer
+*
+* OUTPUT:
+* None.
+*
+* RETURN:
+* Success or Error code.
+*
+*
+*******************************************************************************/
+MV_STATUS mvSpiWriteThenWrite (MV_U8* pCmndBuff, MV_U32 cmndSize, MV_U8* pTxDataBuff,
+ MV_U32 txDataSize)
+{
+ MV_STATUS ret = MV_OK, tempRet;
+
+ /* check for null parameters */
+#ifndef CONFIG_MARVELL
+ if(NULL == pTxDataBuff)
+ {
+ mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
+ return MV_BAD_PARAM;
+ }
+#endif
+
+ if (pCmndBuff == NULL)
+ {
+ mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
+ return MV_BAD_PARAM;
+ }
+
+ /* First assert the chip select */
+ mvSpiCsAssert();
+
+ /* first write the command */
+ if ((cmndSize) && (pCmndBuff != NULL))
+ {
+ if ((tempRet = mvSpiWrite(pCmndBuff, cmndSize)) != MV_OK)
+ ret = tempRet;
+ }
+
+ /* Then write the data buffer */
+#ifndef CONFIG_MARVELL
+ if (txDataSize)
+#else
+ if ((txDataSize) && (pTxDataBuff != NULL))
+#endif
+ {
+ if ((tempRet = mvSpiWrite(pTxDataBuff, txDataSize)) != MV_OK)
+ ret = tempRet;
+ }
+
+ /* Finally deassert the chip select */
+ mvSpiCsDeassert();
+
+ return ret;
+}
+
+/*******************************************************************************
+* mvSpiWriteThenRead - Serialize a command then read a data buffer
+*
+* DESCRIPTION:
+* Assert the chip select line. Transmit the command buffer then read
+* the data buffer. Then deassert the CS line.
+*
+* INPUT:
+* pCmndBuff: Pointer to the command buffer to transmit
+* cmndSize: length of the command size
+* pRxDataBuff: Pointer to the buffer to read the data in
+* txDataSize: length of the data buffer
+*
+* OUTPUT:
+* pRxDataBuff: Pointer to the buffer holding the data
+*
+* RETURN:
+* Success or Error code.
+*
+*
+*******************************************************************************/
+MV_STATUS mvSpiWriteThenRead (MV_U8* pCmndBuff, MV_U32 cmndSize, MV_U8* pRxDataBuff,
+ MV_U32 rxDataSize,MV_U32 dummyBytesToRead)
+{
+ MV_STATUS ret = MV_OK, tempRet;
+ MV_U8 dummyByte;
+
+ /* check for null parameters */
+ if ((pCmndBuff == NULL) && (pRxDataBuff == NULL))
+ {
+ mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
+ return MV_BAD_PARAM;
+ }
+
+ /* First assert the chip select */
+ mvSpiCsAssert();
+
+ /* first write the command */
+ if ((cmndSize) && (pCmndBuff != NULL))
+ {
+ if ((tempRet = mvSpiWrite(pCmndBuff, cmndSize)) != MV_OK)
+ ret = tempRet;
+ }
+
+ /* Read dummy bytes before real data. */
+ while(dummyBytesToRead)
+ {
+ mvSpiRead(&dummyByte,1);
+ dummyBytesToRead--;
+ }
+
+ /* Then write the data buffer */
+ if ((rxDataSize) && (pRxDataBuff != NULL))
+ {
+ if ((tempRet = mvSpiRead(pRxDataBuff, rxDataSize)) != MV_OK)
+ ret = tempRet;
+ }
+
+ /* Finally deassert the chip select */
+ mvSpiCsDeassert();
+
+ return ret;
+}
+
projects / 15.05 / openwrt.git / blobdiff