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12 ********************************************************************************
13 Marvell Commercial License Option
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39 are permitted provided that the following conditions are met:
41 * Redistributions of source code must retain the above copyright notice,
42 this list of conditions and the following disclaimer.
44 * Redistributions in binary form must reproduce the above copyright
45 notice, this list of conditions and the following disclaimer in the
46 documentation and/or other materials provided with the distribution.
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52 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
53 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
54 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
55 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
56 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
57 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
58 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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60 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
61 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *******************************************************************************/
65 #include "spi/mvSpi.h"
66 #include "spi/mvSpiSpec.h"
76 /*******************************************************************************
77 * mvSpiReadAndWrite - Read and Write a buffer simultanuousely
80 * Transmit and receive a buffer over the SPI in 16bit chunks. If the
81 * buffer size is odd, then the last chunk will be 8bits.
84 * pRxBuff: Pointer to the buffer to write the RX info in
85 * pTxBuff: Pointer to the buffer holding the TX info
86 * buffSize: length of both the pTxBuff and pRxBuff
89 * pRxBuff: Pointer of the buffer holding the RX data
92 * Success or Error code.
95 *******************************************************************************/
96 MV_STATUS mvSpiReadAndWrite(MV_U8* pRxBuff, MV_U8* pTxBuff, MV_U32 buffSize)
100 /* check for null parameters */
101 if ((pRxBuff == NULL) || (pTxBuff == NULL) || (buffSize == 0))
103 mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
107 /* First assert the chip select */
110 ret = mvSpiReadWrite(pRxBuff, pTxBuff, buffSize);
112 /* Finally deassert the chip select */
118 /*******************************************************************************
119 * mvSpiWriteThenWrite - Serialize a command followed by the data over the TX line
122 * Assert the chip select line. Transmit the command buffer followed by
123 * the data buffer. Then deassert the CS line.
126 * pCmndBuff: Pointer to the command buffer to transmit
127 * cmndSize: length of the command size
128 * pTxDataBuff: Pointer to the data buffer to transmit
129 * txDataSize: length of the data buffer
135 * Success or Error code.
138 *******************************************************************************/
139 MV_STATUS mvSpiWriteThenWrite (MV_U8* pCmndBuff, MV_U32 cmndSize, MV_U8* pTxDataBuff,
142 MV_STATUS ret = MV_OK, tempRet;
144 /* check for null parameters */
145 #ifndef CONFIG_MARVELL
146 if(NULL == pTxDataBuff)
148 mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
153 if (pCmndBuff == NULL)
155 mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
159 /* First assert the chip select */
162 /* first write the command */
163 if ((cmndSize) && (pCmndBuff != NULL))
165 if ((tempRet = mvSpiWrite(pCmndBuff, cmndSize)) != MV_OK)
169 /* Then write the data buffer */
170 #ifndef CONFIG_MARVELL
173 if ((txDataSize) && (pTxDataBuff != NULL))
176 if ((tempRet = mvSpiWrite(pTxDataBuff, txDataSize)) != MV_OK)
180 /* Finally deassert the chip select */
186 /*******************************************************************************
187 * mvSpiWriteThenRead - Serialize a command then read a data buffer
190 * Assert the chip select line. Transmit the command buffer then read
191 * the data buffer. Then deassert the CS line.
194 * pCmndBuff: Pointer to the command buffer to transmit
195 * cmndSize: length of the command size
196 * pRxDataBuff: Pointer to the buffer to read the data in
197 * txDataSize: length of the data buffer
200 * pRxDataBuff: Pointer to the buffer holding the data
203 * Success or Error code.
206 *******************************************************************************/
207 MV_STATUS mvSpiWriteThenRead (MV_U8* pCmndBuff, MV_U32 cmndSize, MV_U8* pRxDataBuff,
208 MV_U32 rxDataSize,MV_U32 dummyBytesToRead)
210 MV_STATUS ret = MV_OK, tempRet;
213 /* check for null parameters */
214 if ((pCmndBuff == NULL) && (pRxDataBuff == NULL))
216 mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__);
220 /* First assert the chip select */
223 /* first write the command */
224 if ((cmndSize) && (pCmndBuff != NULL))
226 if ((tempRet = mvSpiWrite(pCmndBuff, cmndSize)) != MV_OK)
230 /* Read dummy bytes before real data. */
231 while(dummyBytesToRead)
233 mvSpiRead(&dummyByte,1);
237 /* Then write the data buffer */
238 if ((rxDataSize) && (pRxDataBuff != NULL))
240 if ((tempRet = mvSpiRead(pRxDataBuff, rxDataSize)) != MV_OK)
244 /* Finally deassert the chip select */