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annotate fatfs_sd.c @ 49:ace431a0d0f5

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Add SDIO code poached from STM. Use FatFS to read from SD card. LFN doesn't work reliably so it's disabled for now.
author Daniel O'Connor <darius@dons.net.au>
date Wed, 03 Apr 2013 23:34:20 +1030
parents
children d7207a9d3c3b
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rev   line source
49
ace431a0d0f5 Add SDIO code poached from STM. Use FatFS to read from SD card.
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1 /*
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2 * Glue between FatFS and the ST SDIO code
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3 *
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4 * Copyright (c) 2013
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5 * Daniel O'Connor <darius@dons.net.au>. All rights reserved.
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6 *
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7 * Redistribution and use in source and binary forms, with or without
ace431a0d0f5 Add SDIO code poached from STM. Use FatFS to read from SD card.
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8 * modification, are permitted provided that the following conditions
ace431a0d0f5 Add SDIO code poached from STM. Use FatFS to read from SD card.
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9 * are met:
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10 * 1. Redistributions of source code must retain the above copyright
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11 * notice, this list of conditions and the following disclaimer.
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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26 * SUCH DAMAGE.
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27 */
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28
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29 #include <assert.h>
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30 #include <inttypes.h>
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31 #include <stdio.h>
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32 #include <stdint.h>
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33 #include <stdlib.h>
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34 #include <string.h>
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35
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36 #include "stm32f10x.h"
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37 #include "stm32_eval_sdio_sd.h"
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38 #include "diskio.h"
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39
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40 DSTATUS
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41 disk_initialize(BYTE pdrv) {
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42 SD_Error err;
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43
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44 /* Only have 1 disk */
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45 if (pdrv != 0)
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46 return STA_NOINIT;
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47
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48 if ((err = SD_Init()) != SD_OK) {
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49 printf("Failed init: %d\r\n", err);
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50 return STA_NOINIT;
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51 }
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52
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53 return 0;
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54 }
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55
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56 DSTATUS
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57 disk_status(BYTE pdrv) {
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58 if (pdrv != 0)
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59 return STA_NOINIT;
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60
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61 return 0;
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62 }
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63
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64 DRESULT
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65 disk_read(BYTE pdrv, BYTE *buff, DWORD sector, BYTE count) {
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66 SD_Error err;
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67
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68 if (pdrv != 0)
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69 return STA_NOINIT;
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70
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71 if (count == 1)
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72 err = SD_ReadBlock(buff, sector * SD_BLOCK_SIZE, SD_BLOCK_SIZE);
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73 else
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74 err = SD_ReadMultiBlocks(buff, sector * SD_BLOCK_SIZE, SD_BLOCK_SIZE, count);
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75
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76 if (err != SD_OK) {
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77 printf("Read failed: %d\r\n", err);
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78 return STA_NOINIT;
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79 }
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80
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81 return RES_OK;
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82 }
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83
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84 DRESULT
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85 disk_write(BYTE pdrv, const BYTE *buff, DWORD sector, BYTE count) {
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86 if (pdrv != 0)
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87 return STA_NOINIT;
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88
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89 return RES_WRPRT;
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90 }
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91
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92 DRESULT
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93 disk_ioctl(BYTE pdrv, BYTE cmd, void *buff) {
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94 WORD *wd;
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95 DWORD *dwd;
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96 SD_CardInfo cardinfo;
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97 SD_Error err;
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98
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99 wd = buff;
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100 dwd = buff;
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101
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102 if (pdrv != 0)
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103 return STA_NOINIT;
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104 switch (cmd) {
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105 case CTRL_SYNC:
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106 printf("Sync\r\n");
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107 break;
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108
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109 case GET_SECTOR_SIZE:
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110 printf("Get sector size\r\n");
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111 *wd = SD_BLOCK_SIZE;
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112 break;
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113
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114 case GET_SECTOR_COUNT:
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115 printf("Get sector count\r\n");
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116
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117 if ((err = SD_GetCardInfo(&cardinfo)) != SD_OK) {
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118 printf("Get card info failed: %d\r\b", err);
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119 return RES_ERROR;
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120 }
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121 *dwd = cardinfo.CardCapacity / SD_BLOCK_SIZE;
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122 break;
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123
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124 case GET_BLOCK_SIZE:
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125 printf("Get block size\r\n");
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126
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127 if ((err = SD_GetCardInfo(&cardinfo)) != SD_OK) {
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128 printf("Get card info failed: %d\r\b", err);
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129 return RES_ERROR;
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130 }
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131
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132 /* FatFS wants log2(blocksize) */
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133 *dwd = 0;
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134 while (cardinfo.CardBlockSize > 0) {
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135 *dwd++;
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136 cardinfo.CardBlockSize >>= 1;
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137 }
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138 break;
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139
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140 case CTRL_ERASE_SECTOR:
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141 return RES_ERROR;
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142 }
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143
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144 return RES_OK;
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145
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146 }
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147
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148 /*
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149 bit 31:25 Year from 1980 (0..127)
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150 bit 24:21 Month (1..12)
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151 bit 20:16 Day in month(1..31)
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152 bit 15:11 Hour (0..23)
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153 bit 10: 5 Minute (0..59)
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154 bit 4: 0 Second / 2 (0..29)
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155 */
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156 DWORD
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157 get_fattime(void) {
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158 return 0;
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159 }
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160
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161 void *
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162 ff_memalloc(UINT msize) {
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163 return malloc(msize);
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164 }
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165
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166 void
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167 ff_memfree(void *mblock) {
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168 free(mblock);
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169 }