| 1 | /******************************************************************************* |
| 2 | Copyright (C) Marvell International Ltd. and its affiliates |
| 3 | |
| 4 | This software file (the "File") is owned and distributed by Marvell |
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| 12 | ******************************************************************************** |
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| 14 | |
| 15 | If you received this File from Marvell and you have entered into a commercial |
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| 17 | to you under the terms of the applicable Commercial License. |
| 18 | |
| 19 | ******************************************************************************** |
| 20 | Marvell GPL License Option |
| 21 | |
| 22 | If you received this File from Marvell, you may opt to use, redistribute and/or |
| 23 | modify this File in accordance with the terms and conditions of the General |
| 24 | Public License Version 2, June 1991 (the "GPL License"), a copy of which is |
| 25 | available along with the File in the license.txt file or by writing to the Free |
| 26 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or |
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| 28 | |
| 29 | THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED |
| 30 | WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY |
| 31 | DISCLAIMED. The GPL License provides additional details about this warranty |
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| 33 | ******************************************************************************** |
| 34 | Marvell BSD License Option |
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| 38 | Redistribution and use in source and binary forms, with or without modification, |
| 39 | are permitted provided that the following conditions are met: |
| 40 | |
| 41 | * Redistributions of source code must retain the above copyright notice, |
| 42 | this list of conditions and the following disclaimer. |
| 43 | |
| 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. |
| 47 | |
| 48 | * Neither the name of Marvell nor the names of its contributors may be |
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| 50 | specific prior written permission. |
| 51 | |
| 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 |
| 59 | ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 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. |
| 62 | |
| 63 | *******************************************************************************/ |
| 64 | |
| 65 | #include "spi/mvSpi.h" |
| 66 | #include "spi/mvSpiSpec.h" |
| 67 | |
| 68 | /*#define MV_DEBUG*/ |
| 69 | #ifdef MV_DEBUG |
| 70 | #define DB(x) x |
| 71 | #else |
| 72 | #define DB(x) |
| 73 | #endif |
| 74 | |
| 75 | |
| 76 | /******************************************************************************* |
| 77 | * mvSpiReadAndWrite - Read and Write a buffer simultanuousely |
| 78 | * |
| 79 | * DESCRIPTION: |
| 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. |
| 82 | * |
| 83 | * INPUT: |
| 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 |
| 87 | * |
| 88 | * OUTPUT: |
| 89 | * pRxBuff: Pointer of the buffer holding the RX data |
| 90 | * |
| 91 | * RETURN: |
| 92 | * Success or Error code. |
| 93 | * |
| 94 | * |
| 95 | *******************************************************************************/ |
| 96 | MV_STATUS mvSpiReadAndWrite(MV_U8* pRxBuff, MV_U8* pTxBuff, MV_U32 buffSize) |
| 97 | { |
| 98 | MV_STATUS ret; |
| 99 | |
| 100 | /* check for null parameters */ |
| 101 | if ((pRxBuff == NULL) || (pTxBuff == NULL) || (buffSize == 0)) |
| 102 | { |
| 103 | mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__); |
| 104 | return MV_BAD_PARAM; |
| 105 | } |
| 106 | |
| 107 | /* First assert the chip select */ |
| 108 | mvSpiCsAssert(); |
| 109 | |
| 110 | ret = mvSpiReadWrite(pRxBuff, pTxBuff, buffSize); |
| 111 | |
| 112 | /* Finally deassert the chip select */ |
| 113 | mvSpiCsDeassert(); |
| 114 | |
| 115 | return ret; |
| 116 | } |
| 117 | |
| 118 | /******************************************************************************* |
| 119 | * mvSpiWriteThenWrite - Serialize a command followed by the data over the TX line |
| 120 | * |
| 121 | * DESCRIPTION: |
| 122 | * Assert the chip select line. Transmit the command buffer followed by |
| 123 | * the data buffer. Then deassert the CS line. |
| 124 | * |
| 125 | * INPUT: |
| 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 |
| 130 | * |
| 131 | * OUTPUT: |
| 132 | * None. |
| 133 | * |
| 134 | * RETURN: |
| 135 | * Success or Error code. |
| 136 | * |
| 137 | * |
| 138 | *******************************************************************************/ |
| 139 | MV_STATUS mvSpiWriteThenWrite (MV_U8* pCmndBuff, MV_U32 cmndSize, MV_U8* pTxDataBuff, |
| 140 | MV_U32 txDataSize) |
| 141 | { |
| 142 | MV_STATUS ret = MV_OK, tempRet; |
| 143 | |
| 144 | /* check for null parameters */ |
| 145 | #ifndef CONFIG_MARVELL |
| 146 | if(NULL == pTxDataBuff) |
| 147 | { |
| 148 | mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__); |
| 149 | return MV_BAD_PARAM; |
| 150 | } |
| 151 | #endif |
| 152 | |
| 153 | if (pCmndBuff == NULL) |
| 154 | { |
| 155 | mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__); |
| 156 | return MV_BAD_PARAM; |
| 157 | } |
| 158 | |
| 159 | /* First assert the chip select */ |
| 160 | mvSpiCsAssert(); |
| 161 | |
| 162 | /* first write the command */ |
| 163 | if ((cmndSize) && (pCmndBuff != NULL)) |
| 164 | { |
| 165 | if ((tempRet = mvSpiWrite(pCmndBuff, cmndSize)) != MV_OK) |
| 166 | ret = tempRet; |
| 167 | } |
| 168 | |
| 169 | /* Then write the data buffer */ |
| 170 | #ifndef CONFIG_MARVELL |
| 171 | if (txDataSize) |
| 172 | #else |
| 173 | if ((txDataSize) && (pTxDataBuff != NULL)) |
| 174 | #endif |
| 175 | { |
| 176 | if ((tempRet = mvSpiWrite(pTxDataBuff, txDataSize)) != MV_OK) |
| 177 | ret = tempRet; |
| 178 | } |
| 179 | |
| 180 | /* Finally deassert the chip select */ |
| 181 | mvSpiCsDeassert(); |
| 182 | |
| 183 | return ret; |
| 184 | } |
| 185 | |
| 186 | /******************************************************************************* |
| 187 | * mvSpiWriteThenRead - Serialize a command then read a data buffer |
| 188 | * |
| 189 | * DESCRIPTION: |
| 190 | * Assert the chip select line. Transmit the command buffer then read |
| 191 | * the data buffer. Then deassert the CS line. |
| 192 | * |
| 193 | * INPUT: |
| 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 |
| 198 | * |
| 199 | * OUTPUT: |
| 200 | * pRxDataBuff: Pointer to the buffer holding the data |
| 201 | * |
| 202 | * RETURN: |
| 203 | * Success or Error code. |
| 204 | * |
| 205 | * |
| 206 | *******************************************************************************/ |
| 207 | MV_STATUS mvSpiWriteThenRead (MV_U8* pCmndBuff, MV_U32 cmndSize, MV_U8* pRxDataBuff, |
| 208 | MV_U32 rxDataSize,MV_U32 dummyBytesToRead) |
| 209 | { |
| 210 | MV_STATUS ret = MV_OK, tempRet; |
| 211 | MV_U8 dummyByte; |
| 212 | |
| 213 | /* check for null parameters */ |
| 214 | if ((pCmndBuff == NULL) && (pRxDataBuff == NULL)) |
| 215 | { |
| 216 | mvOsPrintf("%s ERROR: Null pointer parameter!\n", __FUNCTION__); |
| 217 | return MV_BAD_PARAM; |
| 218 | } |
| 219 | |
| 220 | /* First assert the chip select */ |
| 221 | mvSpiCsAssert(); |
| 222 | |
| 223 | /* first write the command */ |
| 224 | if ((cmndSize) && (pCmndBuff != NULL)) |
| 225 | { |
| 226 | if ((tempRet = mvSpiWrite(pCmndBuff, cmndSize)) != MV_OK) |
| 227 | ret = tempRet; |
| 228 | } |
| 229 | |
| 230 | /* Read dummy bytes before real data. */ |
| 231 | while(dummyBytesToRead) |
| 232 | { |
| 233 | mvSpiRead(&dummyByte,1); |
| 234 | dummyBytesToRead--; |
| 235 | } |
| 236 | |
| 237 | /* Then write the data buffer */ |
| 238 | if ((rxDataSize) && (pRxDataBuff != NULL)) |
| 239 | { |
| 240 | if ((tempRet = mvSpiRead(pRxDataBuff, rxDataSize)) != MV_OK) |
| 241 | ret = tempRet; |
| 242 | } |
| 243 | |
| 244 | /* Finally deassert the chip select */ |
| 245 | mvSpiCsDeassert(); |
| 246 | |
| 247 | return ret; |
| 248 | } |
| 249 | |
| 250 | |
