1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief SD Card LibI2C driver. |
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5 | */ |
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6 | |
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7 | /* |
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8 | * Copyright (c) 2008 |
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9 | * Embedded Brains GmbH |
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10 | * Obere Lagerstr. 30 |
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11 | * D-82178 Puchheim |
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12 | * Germany |
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13 | * rtems@embedded-brains.de |
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14 | * |
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15 | * The license and distribution terms for this file may be found in the file |
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16 | * LICENSE in this distribution or at http://www.rtems.com/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #include <stdio.h> |
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20 | #include <errno.h> |
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21 | #include <inttypes.h> |
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22 | |
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23 | #include <rtems.h> |
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24 | #include <rtems/libi2c.h> |
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25 | #include <rtems/libio.h> |
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26 | #include <rtems/diskdevs.h> |
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27 | |
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28 | #include <libchip/spi-sd-card.h> |
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29 | |
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30 | #include <rtems/status-checks.h> |
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31 | |
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32 | /** |
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33 | * @name Integer to and from Byte-Stream Converter |
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34 | * @{ |
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35 | */ |
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36 | |
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37 | static inline uint16_t sd_card_get_uint16( const uint8_t *s) |
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38 | { |
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39 | return (uint16_t) ((s [0] << 8) | s [1]); |
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40 | } |
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41 | |
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42 | static inline uint32_t sd_card_get_uint32( const uint8_t *s) |
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43 | { |
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44 | return ((uint32_t) s [0] << 24) | ((uint32_t) s [1] << 16) | ((uint32_t) s [2] << 8) | (uint32_t) s [3]; |
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45 | } |
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46 | |
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47 | static inline void sd_card_put_uint16( uint16_t v, uint8_t *s) |
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48 | { |
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49 | *s++ = (uint8_t) (v >> 8); |
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50 | *s = (uint8_t) (v); |
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51 | } |
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52 | |
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53 | static inline void sd_card_put_uint32( uint32_t v, uint8_t *s) |
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54 | { |
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55 | *s++ = (uint8_t) (v >> 24); |
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56 | *s++ = (uint8_t) (v >> 16); |
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57 | *s++ = (uint8_t) (v >> 8); |
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58 | *s = (uint8_t) (v); |
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59 | } |
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60 | |
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61 | /** @} */ |
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62 | |
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63 | #define SD_CARD_BUSY_TOKEN 0 |
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64 | |
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65 | #define SD_CARD_BLOCK_SIZE_DEFAULT 512 |
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66 | |
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67 | #define SD_CARD_COMMAND_RESPONSE_START 7 |
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68 | |
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69 | /** |
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70 | * @name Commands |
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71 | * @{ |
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72 | */ |
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73 | |
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74 | #define SD_CARD_CMD_GO_IDLE_STATE 0 |
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75 | #define SD_CARD_CMD_SEND_OP_COND 1 |
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76 | #define SD_CARD_CMD_SEND_CSD 9 |
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77 | #define SD_CARD_CMD_SEND_CID 10 |
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78 | #define SD_CARD_CMD_STOP_TRANSMISSION 12 |
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79 | #define SD_CARD_CMD_SEND_STATUS 13 |
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80 | #define SD_CARD_CMD_SET_BLOCKLEN 16 |
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81 | #define SD_CARD_CMD_READ_SINGLE_BLOCK 17 |
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82 | #define SD_CARD_CMD_READ_MULTIPLE_BLOCK 18 |
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83 | #define SD_CARD_CMD_SET_BLOCK_COUNT 23 |
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84 | #define SD_CARD_CMD_WRITE_BLOCK 24 |
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85 | #define SD_CARD_CMD_WRITE_MULTIPLE_BLOCK 25 |
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86 | #define SD_CARD_CMD_PROGRAM_CSD 27 |
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87 | #define SD_CARD_CMD_SET_WRITE_PROT 28 |
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88 | #define SD_CARD_CMD_CLR_WRITE_PROT 29 |
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89 | #define SD_CARD_CMD_SEND_WRITE_PROT 30 |
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90 | #define SD_CARD_CMD_TAG_SECTOR_START 32 |
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91 | #define SD_CARD_CMD_TAG_SECTOR_END 33 |
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92 | #define SD_CARD_CMD_UNTAG_SECTOR 34 |
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93 | #define SD_CARD_CMD_TAG_ERASE_GROUP_START 35 |
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94 | #define SD_CARD_CMD_TAG_ERASE_GROUP_END 36 |
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95 | #define SD_CARD_CMD_UNTAG_ERASE_GROUP 37 |
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96 | #define SD_CARD_CMD_ERASE 38 |
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97 | #define SD_CARD_CMD_LOCK_UNLOCK 42 |
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98 | #define SD_CARD_CMD_APP_CMD 55 |
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99 | #define SD_CARD_CMD_GEN_CND 56 |
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100 | #define SD_CARD_CMD_READ_OCR 58 |
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101 | #define SD_CARD_CMD_CRC_ON_OFF 59 |
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102 | |
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103 | /** @} */ |
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104 | |
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105 | /** |
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106 | * @name Application Commands |
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107 | * @{ |
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108 | */ |
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109 | |
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110 | #define SD_CARD_ACMD_SD_SEND_OP_COND 41 |
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111 | |
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112 | /** @} */ |
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113 | |
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114 | /** |
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115 | * @name Command Fields |
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116 | * @{ |
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117 | */ |
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118 | |
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119 | #define SD_CARD_COMMAND_SET_COMMAND( c, cmd) (c) [1] = (uint8_t) (0x40 + ((cmd) & 0x3f)) |
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120 | #define SD_CARD_COMMAND_SET_ARGUMENT( c, arg) sd_card_put_uint32( (arg), &((c) [2])) |
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121 | #define SD_CARD_COMMAND_SET_CRC7( c, crc7) ((c) [6] = (crc7) << 1) |
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122 | |
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123 | #define SD_CARD_COMMAND_GET_CRC7( c) ((c) [6] >> 1) |
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124 | |
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125 | /** @} */ |
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126 | |
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127 | /** |
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128 | * @name Response Fields |
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129 | * @{ |
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130 | */ |
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131 | |
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132 | #define SD_CARD_IS_RESPONSE( r) (((r) & 0x80) == 0) |
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133 | |
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134 | #define SD_CARD_IS_ERRORLESS_RESPONSE( r) (((r) & 0x7e) == 0) |
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135 | |
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136 | #define SD_CARD_IS_NOT_IDLE_RESPONSE( r) (((r) & 0x81) == 0) |
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137 | |
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138 | #define SD_CARD_IS_DATA_ERROR( r) (((r) & 0xe0) == 0) |
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139 | |
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140 | #define SD_CARD_IS_DATA_REJECTED( r) (((r) & 0x1f) != 0x05) |
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141 | |
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142 | /** @} */ |
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143 | |
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144 | /** |
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145 | * @name Card Identification |
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146 | * @{ |
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147 | */ |
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148 | |
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149 | #define SD_CARD_CID_SIZE 16 |
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150 | |
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151 | #define SD_CARD_CID_GET_MID( cid) ((cid) [0]) |
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152 | #define SD_CARD_CID_GET_OID( cid) sd_card_get_uint16( cid + 1) |
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153 | #define SD_CARD_CID_GET_PNM( cid, i) ((char) (cid) [3 + (i)]) |
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154 | #define SD_CARD_CID_GET_PRV( cid) ((cid) [9]) |
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155 | #define SD_CARD_CID_GET_PSN( cid) sd_card_get_uint32( cid + 10) |
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156 | #define SD_CARD_CID_GET_MDT( cid) ((cid) [14]) |
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157 | #define SD_CARD_CID_GET_CRC7( cid) ((cid) [15] >> 1) |
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158 | |
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159 | /** @} */ |
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160 | |
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161 | /** |
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162 | * @name Card Specific Data |
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163 | * @{ |
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164 | */ |
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165 | |
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166 | #define SD_CARD_CSD_SIZE 16 |
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167 | |
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168 | #define SD_CARD_CSD_GET_CSD_STRUCTURE( csd) ((csd) [0] >> 6) |
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169 | #define SD_CARD_CSD_GET_SPEC_VERS( csd) (((csd) [0] >> 2) & 0xf) |
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170 | #define SD_CARD_CSD_GET_TAAC( csd) ((csd) [1]) |
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171 | #define SD_CARD_CSD_GET_NSAC( csd) ((uint32_t) (csd) [2]) |
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172 | #define SD_CARD_CSD_GET_TRAN_SPEED( csd) ((csd) [3]) |
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173 | #define SD_CARD_CSD_GET_C_SIZE( csd) ((((uint32_t) (csd) [6] & 0x3) << 10) + ((uint32_t) (csd) [7] << 2) + (((uint32_t) (csd) [8] >> 6) & 0x3)) |
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174 | #define SD_CARD_CSD_GET_C_SIZE_MULT( csd) ((((csd) [9] & 0x3) << 1) + (((csd) [10] >> 7) & 0x1)) |
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175 | #define SD_CARD_CSD_GET_READ_BLK_LEN( csd) ((uint32_t) (csd) [5] & 0xf) |
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176 | #define SD_CARD_CSD_GET_WRITE_BLK_LEN( csd) ((((csd) [12] & 0x3) << 2) + (((csd) [13] >> 6) & 0x3)) |
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177 | |
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178 | /** @} */ |
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179 | |
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180 | #define SD_CARD_INVALIDATE_RESPONSE_INDEX( e) e->response_index = SD_CARD_COMMAND_SIZE |
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181 | |
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182 | /** |
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183 | * @name Data Start and Stop Tokens |
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184 | * @{ |
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185 | */ |
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186 | |
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187 | #define SD_CARD_START_BLOCK_SINGLE_BLOCK_READ 0xfe |
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188 | #define SD_CARD_START_BLOCK_MULTIPLE_BLOCK_READ 0xfe |
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189 | #define SD_CARD_START_BLOCK_SINGLE_BLOCK_WRITE 0xfe |
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190 | #define SD_CARD_START_BLOCK_MULTIPLE_BLOCK_WRITE 0xfc |
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191 | #define SD_CARD_STOP_TRANSFER_MULTIPLE_BLOCK_WRITE 0xfd |
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192 | |
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193 | /** @} */ |
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194 | |
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195 | /** |
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196 | * @name Card Specific Data Functions |
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197 | * @{ |
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198 | */ |
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199 | |
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200 | static inline uint32_t sd_card_block_number( const uint8_t *csd) |
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201 | { |
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202 | uint32_t size = SD_CARD_CSD_GET_C_SIZE( csd); |
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203 | uint32_t mult = 1U << (SD_CARD_CSD_GET_C_SIZE_MULT( csd) + 2); |
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204 | return (size + 1) * mult; |
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205 | } |
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206 | |
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207 | static inline uint32_t sd_card_capacity( const uint8_t *csd) |
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208 | { |
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209 | uint32_t block_size = 1U << SD_CARD_CSD_GET_READ_BLK_LEN( csd); |
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210 | return sd_card_block_number( csd) * block_size; |
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211 | } |
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212 | |
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213 | static inline uint32_t sd_card_transfer_speed( const uint8_t *csd) |
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214 | { |
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215 | uint32_t s = SD_CARD_CSD_GET_TRAN_SPEED( csd); |
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216 | uint32_t e = s & 0x7; |
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217 | uint32_t m = s >> 3; |
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218 | switch (e) { |
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219 | case 0: s = 10000; break; |
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220 | case 1: s = 100000; break; |
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221 | case 2: s = 1000000; break; |
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222 | case 3: s = 10000000; break; |
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223 | default: s = 0; break; |
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224 | } |
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225 | switch (m) { |
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226 | case 1: s *= 10; break; |
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227 | case 2: s *= 12; break; |
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228 | case 3: s *= 13; break; |
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229 | case 4: s *= 15; break; |
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230 | case 5: s *= 20; break; |
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231 | case 6: s *= 25; break; |
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232 | case 7: s *= 30; break; |
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233 | case 8: s *= 35; break; |
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234 | case 9: s *= 40; break; |
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235 | case 10: s *= 45; break; |
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236 | case 11: s *= 50; break; |
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237 | case 12: s *= 55; break; |
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238 | case 13: s *= 60; break; |
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239 | case 14: s *= 70; break; |
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240 | case 15: s *= 80; break; |
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241 | default: s *= 0; break; |
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242 | } |
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243 | return s; |
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244 | } |
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245 | |
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246 | static inline uint32_t sd_card_access_time( const uint8_t *csd) |
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247 | { |
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248 | uint32_t ac = SD_CARD_CSD_GET_TAAC( csd); |
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249 | uint32_t e = ac & 0x7; |
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250 | uint32_t m = ac >> 3; |
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251 | switch (e) { |
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252 | case 0: ac = 1; break; |
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253 | case 1: ac = 10; break; |
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254 | case 2: ac = 100; break; |
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255 | case 3: ac = 1000; break; |
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256 | case 4: ac = 10000; break; |
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257 | case 5: ac = 100000; break; |
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258 | case 6: ac = 1000000; break; |
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259 | case 7: ac = 10000000; break; |
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260 | default: ac = 0; break; |
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261 | } |
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262 | switch (m) { |
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263 | case 1: ac *= 10; break; |
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264 | case 2: ac *= 12; break; |
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265 | case 3: ac *= 13; break; |
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266 | case 4: ac *= 15; break; |
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267 | case 5: ac *= 20; break; |
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268 | case 6: ac *= 25; break; |
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269 | case 7: ac *= 30; break; |
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270 | case 8: ac *= 35; break; |
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271 | case 9: ac *= 40; break; |
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272 | case 10: ac *= 45; break; |
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273 | case 11: ac *= 50; break; |
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274 | case 12: ac *= 55; break; |
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275 | case 13: ac *= 60; break; |
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276 | case 14: ac *= 70; break; |
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277 | case 15: ac *= 80; break; |
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278 | default: ac *= 0; break; |
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279 | } |
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280 | return ac / 10; |
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281 | } |
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282 | |
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283 | static inline uint32_t sd_card_max_access_time( const uint8_t *csd, uint32_t transfer_speed) |
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284 | { |
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285 | uint64_t ac = sd_card_access_time( csd); |
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286 | uint32_t n = SD_CARD_CSD_GET_NSAC( csd) * 100; |
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287 | ac = (ac * transfer_speed) / 8000000000ULL; |
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288 | return n + (uint32_t) ac; |
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289 | } |
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290 | |
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291 | /** @} */ |
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292 | |
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293 | /** |
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294 | * @name Communication Functions |
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295 | * @{ |
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296 | */ |
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297 | |
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298 | static inline int sd_card_query( sd_card_driver_entry *e, uint8_t *in, int n) |
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299 | { |
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300 | return rtems_libi2c_read_bytes( e->bus, in, n); |
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301 | } |
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302 | |
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303 | static int sd_card_wait( sd_card_driver_entry *e) |
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304 | { |
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305 | int rv = 0; |
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306 | int r = 0; |
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307 | int n = 2; |
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308 | while (e->busy) { |
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309 | /* Query busy tokens */ |
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310 | rv = sd_card_query( e, e->response, n); |
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311 | RTEMS_CHECK_RV( rv, "Busy"); |
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312 | |
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313 | /* Search for non busy tokens */ |
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314 | for (r = 0; r < n; ++r) { |
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315 | if (e->response [r] != SD_CARD_BUSY_TOKEN) { |
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316 | e->busy = false; |
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317 | return 0; |
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318 | } |
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319 | } |
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320 | n = SD_CARD_COMMAND_SIZE; |
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321 | |
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322 | if (e->schedule_if_busy) { |
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323 | /* Invoke the scheduler */ |
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324 | rtems_task_wake_after( RTEMS_YIELD_PROCESSOR); |
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325 | } |
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326 | } |
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327 | return 0; |
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328 | } |
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329 | |
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330 | static int sd_card_send_command( sd_card_driver_entry *e, uint32_t command, uint32_t argument) |
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331 | { |
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332 | int rv = 0; |
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333 | rtems_libi2c_read_write_t rw = { |
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334 | .rd_buf = e->response, |
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335 | .wr_buf = e->command, |
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336 | .byte_cnt = SD_CARD_COMMAND_SIZE |
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337 | }; |
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338 | int r = 0; |
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339 | |
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340 | SD_CARD_INVALIDATE_RESPONSE_INDEX( e); |
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341 | |
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342 | /* Wait until card is not busy */ |
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343 | rv = sd_card_wait( e); |
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344 | RTEMS_CHECK_RV( rv, "Wait"); |
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345 | |
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346 | /* Write command and read response */ |
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347 | SD_CARD_COMMAND_SET_COMMAND( e->command, command); |
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348 | SD_CARD_COMMAND_SET_ARGUMENT( e->command, argument); |
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349 | rv = rtems_libi2c_ioctl( e->bus, RTEMS_LIBI2C_IOCTL_READ_WRITE, &rw); |
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350 | RTEMS_CHECK_RV( rv, "Write command and read response"); |
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351 | |
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352 | /* Check respose */ |
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353 | for (r = SD_CARD_COMMAND_RESPONSE_START; r < SD_CARD_COMMAND_SIZE; ++r) { |
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354 | RTEMS_DEBUG_PRINT( "Token [%02u]: 0x%02x\n", r, e->response [r]); |
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355 | e->response_index = r; |
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356 | if (SD_CARD_IS_RESPONSE( e->response [r])) { |
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357 | if (SD_CARD_IS_ERRORLESS_RESPONSE( e->response [r])) { |
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358 | return 0; |
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359 | } else { |
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360 | RTEMS_SYSLOG_ERROR( "Command error [%02i]: 0x%02" PRIx8 "\n", r, e->response [r]); |
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361 | goto sd_card_send_command_error; |
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362 | } |
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363 | } else if (e->response [r] != SD_CARD_IDLE_TOKEN) { |
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364 | RTEMS_SYSLOG_ERROR( "Unexpected token [%02i]: 0x%02" PRIx8 "\n", r, e->response [r]); |
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365 | goto sd_card_send_command_error; |
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366 | } |
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367 | } |
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368 | |
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369 | RTEMS_SYSLOG_ERROR( "Timeout\n"); |
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370 | |
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371 | sd_card_send_command_error: |
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372 | |
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373 | RTEMS_SYSLOG_ERROR( "Response:"); |
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374 | for (r = 0; r < SD_CARD_COMMAND_SIZE; ++r) { |
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375 | if (e->response_index == r) { |
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376 | RTEMS_SYSLOG_PRINT( " %02" PRIx8 ":[%02" PRIx8 "]", e->command [r], e->response [r]); |
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377 | } else { |
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378 | RTEMS_SYSLOG_PRINT( " %02" PRIx8 ":%02" PRIx8 "", e->command [r], e->response [r]); |
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379 | } |
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380 | } |
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381 | RTEMS_SYSLOG_PRINT( "\n"); |
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382 | |
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383 | return -RTEMS_IO_ERROR; |
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384 | } |
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385 | |
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386 | static int sd_card_stop_multiple_block_read( sd_card_driver_entry *e) |
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387 | { |
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388 | int rv = 0; |
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389 | |
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390 | SD_CARD_COMMAND_SET_COMMAND( e->command, SD_CARD_CMD_STOP_TRANSMISSION); |
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391 | rv = rtems_libi2c_write_bytes( e->bus, e->command, SD_CARD_COMMAND_SIZE); |
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392 | RTEMS_CHECK_RV( rv, "Write stop transfer token"); |
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393 | |
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394 | return 0; |
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395 | } |
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396 | |
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397 | static int sd_card_stop_multiple_block_write( sd_card_driver_entry *e) |
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398 | { |
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399 | int rv = 0; |
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400 | uint8_t stop_transfer [3] = { SD_CARD_IDLE_TOKEN, SD_CARD_STOP_TRANSFER_MULTIPLE_BLOCK_WRITE, SD_CARD_IDLE_TOKEN }; |
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401 | |
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402 | /* Wait until card is not busy */ |
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403 | rv = sd_card_wait( e); |
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404 | RTEMS_CHECK_RV( rv, "Wait"); |
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405 | |
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406 | /* Send stop token */ |
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407 | rv = rtems_libi2c_write_bytes( e->bus, stop_transfer, 3); |
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408 | RTEMS_CHECK_RV( rv, "Write stop transfer token"); |
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409 | |
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410 | /* Card is now busy */ |
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411 | e->busy = true; |
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412 | |
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413 | return 0; |
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414 | } |
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415 | |
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416 | static int sd_card_read( sd_card_driver_entry *e, uint8_t start_token, uint8_t *in, int n) |
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417 | { |
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418 | int rv = 0; |
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419 | |
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420 | /* Access time idle tokens */ |
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421 | uint32_t n_ac = 1; |
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422 | |
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423 | /* Discard command response */ |
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424 | int r = e->response_index + 1; |
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425 | |
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426 | /* Minimum token number before data start */ |
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427 | int next_response_size = 2; |
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428 | |
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429 | /* Standard response size */ |
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430 | int response_size = SD_CARD_COMMAND_SIZE; |
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431 | |
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432 | /* Data input index */ |
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433 | int i = 0; |
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434 | |
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435 | SD_CARD_INVALIDATE_RESPONSE_INDEX( e); |
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436 | |
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437 | while (true) { |
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438 | RTEMS_DEBUG_PRINT( "Search from %u to %u\n", r, response_size - 1); |
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439 | |
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440 | /* Search the data start token in in current response buffer */ |
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441 | while (r < response_size) { |
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442 | RTEMS_DEBUG_PRINT( "Token [%02u]: 0x%02x\n", r, e->response [r]); |
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443 | if (n_ac > e->n_ac_max) { |
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444 | RTEMS_SYSLOG_ERROR( "Timeout\n"); |
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445 | return -RTEMS_IO_ERROR; |
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446 | } else if (e->response [r] == start_token) { |
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447 | /* Discard data start token */ |
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448 | ++r; |
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449 | goto sd_card_read_start; |
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450 | } else if (SD_CARD_IS_DATA_ERROR( e->response [r])) { |
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451 | RTEMS_SYSLOG_ERROR( "Data error token [%02i]: 0x%02" PRIx8 "\n", r, e->response [r]); |
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452 | return -RTEMS_IO_ERROR; |
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453 | } else if (e->response [r] != SD_CARD_IDLE_TOKEN) { |
---|
454 | RTEMS_SYSLOG_ERROR( "Unexpected token [%02i]: 0x%02" PRIx8 "\n", r, e->response [r]); |
---|
455 | return -RTEMS_IO_ERROR; |
---|
456 | } |
---|
457 | ++n_ac; |
---|
458 | ++r; |
---|
459 | } |
---|
460 | |
---|
461 | /* Query more */ |
---|
462 | rv = sd_card_query( e, e->response, next_response_size); |
---|
463 | RTEMS_CHECK_RV( rv, "Query data start token"); |
---|
464 | |
---|
465 | /* Set standard query size */ |
---|
466 | response_size = next_response_size; |
---|
467 | next_response_size = SD_CARD_COMMAND_SIZE; |
---|
468 | |
---|
469 | /* Reset start position */ |
---|
470 | r = 0; |
---|
471 | } |
---|
472 | |
---|
473 | sd_card_read_start: |
---|
474 | |
---|
475 | /* Read data */ |
---|
476 | while (r < response_size && i < n) { |
---|
477 | in [i++] = e->response [r++]; |
---|
478 | } |
---|
479 | |
---|
480 | /* Read more data? */ |
---|
481 | if (i < n) { |
---|
482 | rv = sd_card_query( e, &in [i], n - i); |
---|
483 | RTEMS_CHECK_RV( rv, "Read data"); |
---|
484 | i += rv; |
---|
485 | } |
---|
486 | |
---|
487 | /* Read CRC 16 and N_RC */ |
---|
488 | rv = sd_card_query( e, e->response, 3); |
---|
489 | RTEMS_CHECK_RV( rv, "Read CRC 16"); |
---|
490 | |
---|
491 | return i; |
---|
492 | } |
---|
493 | |
---|
494 | static int sd_card_write( sd_card_driver_entry *e, uint8_t start_token, uint8_t *out, int n) |
---|
495 | { |
---|
496 | int rv = 0; |
---|
497 | uint8_t crc16 [2] = { 0, 0 }; |
---|
498 | |
---|
499 | /* Data output index */ |
---|
500 | int o = 0; |
---|
501 | |
---|
502 | /* Wait until card is not busy */ |
---|
503 | rv = sd_card_wait( e); |
---|
504 | RTEMS_CHECK_RV( rv, "Wait"); |
---|
505 | |
---|
506 | /* Write data start token */ |
---|
507 | rv = rtems_libi2c_write_bytes( e->bus, &start_token, 1); |
---|
508 | RTEMS_CHECK_RV( rv, "Write data start token"); |
---|
509 | |
---|
510 | /* Write data */ |
---|
511 | o = rtems_libi2c_write_bytes( e->bus, out, n); |
---|
512 | RTEMS_CHECK_RV( o, "Write data"); |
---|
513 | |
---|
514 | /* Write CRC 16 */ |
---|
515 | rv = rtems_libi2c_write_bytes( e->bus, crc16, 2); |
---|
516 | RTEMS_CHECK_RV( rv, "Write CRC 16"); |
---|
517 | |
---|
518 | /* Read data response */ |
---|
519 | rv = sd_card_query( e, e->response, 2); |
---|
520 | RTEMS_CHECK_RV( rv, "Read data response"); |
---|
521 | if (SD_CARD_IS_DATA_REJECTED( e->response [0])) { |
---|
522 | RTEMS_SYSLOG_ERROR( "Data rejected: 0x%02" PRIx8 "\n", e->response [0]); |
---|
523 | return -RTEMS_IO_ERROR; |
---|
524 | } |
---|
525 | |
---|
526 | /* Card is now busy */ |
---|
527 | e->busy = true; |
---|
528 | |
---|
529 | return o; |
---|
530 | } |
---|
531 | |
---|
532 | static inline rtems_status_code sd_card_start( sd_card_driver_entry *e) |
---|
533 | { |
---|
534 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
535 | int rv = 0; |
---|
536 | |
---|
537 | sc = rtems_libi2c_send_start( e->bus); |
---|
538 | RTEMS_CHECK_SC( sc, "Send start"); |
---|
539 | |
---|
540 | rv = rtems_libi2c_ioctl( e->bus, RTEMS_LIBI2C_IOCTL_SET_TFRMODE, &e->transfer_mode); |
---|
541 | RTEMS_CHECK_RV_SC( rv, "Set transfer mode"); |
---|
542 | |
---|
543 | sc = rtems_libi2c_send_addr( e->bus, 1); |
---|
544 | RTEMS_CHECK_SC( sc, "Send address"); |
---|
545 | |
---|
546 | return RTEMS_SUCCESSFUL; |
---|
547 | } |
---|
548 | |
---|
549 | static inline rtems_status_code sd_card_stop( sd_card_driver_entry *e) |
---|
550 | { |
---|
551 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
552 | |
---|
553 | sc = rtems_libi2c_send_stop( e->bus); |
---|
554 | RTEMS_CHECK_SC( sc, "Send stop"); |
---|
555 | |
---|
556 | return RTEMS_SUCCESSFUL; |
---|
557 | } |
---|
558 | |
---|
559 | static rtems_status_code sd_card_init( sd_card_driver_entry *e) |
---|
560 | { |
---|
561 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
562 | int rv = 0; |
---|
563 | uint8_t block [SD_CARD_BLOCK_SIZE_DEFAULT]; |
---|
564 | uint32_t transfer_speed = 0; |
---|
565 | uint32_t read_block_size = 0; |
---|
566 | uint32_t write_block_size = 0; |
---|
567 | |
---|
568 | /* Start */ |
---|
569 | sc = sd_card_start( e); |
---|
570 | RTEMS_CLEANUP_SC( sc, sd_card_driver_init_cleanup, "Start"); |
---|
571 | |
---|
572 | /* Wait until card is not busy */ |
---|
573 | rv = sd_card_wait( e); |
---|
574 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Wait"); |
---|
575 | |
---|
576 | /* Send idle tokens for at least 74 clock cycles with active chip select */ |
---|
577 | memset( block, SD_CARD_IDLE_TOKEN, SD_CARD_BLOCK_SIZE_DEFAULT); |
---|
578 | rv = rtems_libi2c_write_bytes( e->bus, block, SD_CARD_BLOCK_SIZE_DEFAULT); |
---|
579 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Active chip select delay"); |
---|
580 | |
---|
581 | /* Stop */ |
---|
582 | sc = sd_card_stop( e); |
---|
583 | RTEMS_CHECK_SC( sc, "Stop"); |
---|
584 | |
---|
585 | /* Start with inactive chip select */ |
---|
586 | sc = rtems_libi2c_send_start( e->bus); |
---|
587 | RTEMS_CHECK_SC( sc, "Send start"); |
---|
588 | |
---|
589 | /* Set transfer mode */ |
---|
590 | rv = rtems_libi2c_ioctl( e->bus, RTEMS_LIBI2C_IOCTL_SET_TFRMODE, &e->transfer_mode); |
---|
591 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Set transfer mode"); |
---|
592 | |
---|
593 | /* Send idle tokens with inactive chip select */ |
---|
594 | rv = sd_card_query( e, e->response, SD_CARD_COMMAND_SIZE); |
---|
595 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Inactive chip select delay"); |
---|
596 | |
---|
597 | /* Activate chip select */ |
---|
598 | sc = rtems_libi2c_send_addr( e->bus, 1); |
---|
599 | RTEMS_CLEANUP_SC( sc, sd_card_driver_init_cleanup, "Send address"); |
---|
600 | |
---|
601 | /* Stop multiple block write */ |
---|
602 | sd_card_stop_multiple_block_write( e); |
---|
603 | |
---|
604 | /* Get card status */ |
---|
605 | sd_card_send_command( e, SD_CARD_CMD_SEND_STATUS, 0); |
---|
606 | |
---|
607 | /* Stop multiple block read */ |
---|
608 | sd_card_stop_multiple_block_read( e); |
---|
609 | |
---|
610 | /* Switch to SPI mode */ |
---|
611 | rv = sd_card_send_command( e, SD_CARD_CMD_GO_IDLE_STATE, 0); |
---|
612 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_CMD_GO_IDLE_STATE"); |
---|
613 | |
---|
614 | /* Initialize card */ |
---|
615 | while (true) { |
---|
616 | rv = sd_card_send_command( e, SD_CARD_CMD_APP_CMD, 0); |
---|
617 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_CMD_APP_CMD"); |
---|
618 | rv = sd_card_send_command( e, SD_CARD_ACMD_SD_SEND_OP_COND, 0); |
---|
619 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_ACMD_SD_SEND_OP_COND"); |
---|
620 | |
---|
621 | /* Not idle? */ |
---|
622 | if (SD_CARD_IS_NOT_IDLE_RESPONSE( e->response [e->response_index])) { |
---|
623 | break; |
---|
624 | } |
---|
625 | |
---|
626 | /* Invoke the scheduler */ |
---|
627 | rtems_task_wake_after( RTEMS_YIELD_PROCESSOR); |
---|
628 | }; |
---|
629 | |
---|
630 | /* Card Identification */ |
---|
631 | if (e->verbose) { |
---|
632 | rv = sd_card_send_command( e, SD_CARD_CMD_SEND_CID, 0); |
---|
633 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_CMD_SEND_CID"); |
---|
634 | rv = sd_card_read( e, SD_CARD_START_BLOCK_SINGLE_BLOCK_READ, block, SD_CARD_CID_SIZE); |
---|
635 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Read: SD_CARD_CMD_SEND_CID"); |
---|
636 | RTEMS_SYSLOG( "*** Card Identification ***\n"); |
---|
637 | RTEMS_SYSLOG( "Manufacturer ID : %" PRIu8 "\n", SD_CARD_CID_GET_MID( block)); |
---|
638 | RTEMS_SYSLOG( "OEM/Application ID : %" PRIu16 "\n", SD_CARD_CID_GET_OID( block)); |
---|
639 | RTEMS_SYSLOG( |
---|
640 | "Product name : %c%c%c%c%c%c\n", |
---|
641 | SD_CARD_CID_GET_PNM( block, 0), |
---|
642 | SD_CARD_CID_GET_PNM( block, 1), |
---|
643 | SD_CARD_CID_GET_PNM( block, 2), |
---|
644 | SD_CARD_CID_GET_PNM( block, 3), |
---|
645 | SD_CARD_CID_GET_PNM( block, 4), |
---|
646 | SD_CARD_CID_GET_PNM( block, 5) |
---|
647 | ); |
---|
648 | RTEMS_SYSLOG( "Product revision : %" PRIu8 "\n", SD_CARD_CID_GET_PRV( block)); |
---|
649 | RTEMS_SYSLOG( "Product serial number : %" PRIu32 "\n", SD_CARD_CID_GET_PSN( block)); |
---|
650 | RTEMS_SYSLOG( "Manufacturing date : %" PRIu8 "\n", SD_CARD_CID_GET_MDT( block)); |
---|
651 | RTEMS_SYSLOG( "7-bit CRC checksum : %" PRIu8 "\n", SD_CARD_CID_GET_CRC7( block)); |
---|
652 | } |
---|
653 | |
---|
654 | /* Card Specific Data */ |
---|
655 | rv = sd_card_send_command( e, SD_CARD_CMD_SEND_CSD, 0); |
---|
656 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_CMD_SEND_CSD"); |
---|
657 | rv = sd_card_read( e, SD_CARD_START_BLOCK_SINGLE_BLOCK_READ, block, SD_CARD_CSD_SIZE); |
---|
658 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Read: SD_CARD_CMD_SEND_CSD"); |
---|
659 | transfer_speed = sd_card_transfer_speed( block); |
---|
660 | e->transfer_mode.baudrate = transfer_speed; |
---|
661 | e->n_ac_max = sd_card_max_access_time( block, transfer_speed); |
---|
662 | read_block_size = 1U << SD_CARD_CSD_GET_READ_BLK_LEN( block); |
---|
663 | e->block_size_shift = SD_CARD_CSD_GET_READ_BLK_LEN( block); |
---|
664 | write_block_size = 1U << e->block_size_shift; |
---|
665 | if (read_block_size < write_block_size) { |
---|
666 | RTEMS_SYSLOG_ERROR( "Read block size smaller than write block size\n"); |
---|
667 | return -RTEMS_IO_ERROR; |
---|
668 | } |
---|
669 | e->block_size = write_block_size; |
---|
670 | e->block_number = sd_card_block_number( block); |
---|
671 | if (e->verbose) { |
---|
672 | RTEMS_SYSLOG( "*** Card Specific Data ***\n"); |
---|
673 | RTEMS_SYSLOG( "CSD structure : %" PRIu8 "\n", SD_CARD_CSD_GET_CSD_STRUCTURE( block)); |
---|
674 | RTEMS_SYSLOG( "Spec version : %" PRIu8 "\n", SD_CARD_CSD_GET_SPEC_VERS( block)); |
---|
675 | RTEMS_SYSLOG( "Access time [ns] : %" PRIu32 "\n", sd_card_access_time( block)); |
---|
676 | RTEMS_SYSLOG( "Max access time [N] : %" PRIu32 "\n", e->n_ac_max); |
---|
677 | RTEMS_SYSLOG( "Max read block size [B] : %" PRIu32 "\n", read_block_size); |
---|
678 | RTEMS_SYSLOG( "Max write block size [B] : %" PRIu32 "\n", write_block_size); |
---|
679 | RTEMS_SYSLOG( "Block size [B] : %" PRIu32 "\n", e->block_size); |
---|
680 | RTEMS_SYSLOG( "Block number : %" PRIu32 "\n", e->block_number); |
---|
681 | RTEMS_SYSLOG( "Capacity [B] : %" PRIu32 "\n", sd_card_capacity( block)); |
---|
682 | RTEMS_SYSLOG( "Max transfer speed [b/s] : %" PRIu32 "\n", transfer_speed); |
---|
683 | } |
---|
684 | |
---|
685 | /* Set read block size */ |
---|
686 | rv = sd_card_send_command( e, SD_CARD_CMD_SET_BLOCKLEN, e->block_size); |
---|
687 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_CMD_SET_BLOCKLEN"); |
---|
688 | |
---|
689 | /* Stop */ |
---|
690 | sc = sd_card_stop( e); |
---|
691 | RTEMS_CHECK_SC( sc, "Stop"); |
---|
692 | |
---|
693 | return RTEMS_SUCCESSFUL; |
---|
694 | |
---|
695 | sd_card_driver_init_cleanup: |
---|
696 | |
---|
697 | /* Stop */ |
---|
698 | sd_card_stop( e); |
---|
699 | |
---|
700 | return sc; |
---|
701 | } |
---|
702 | /** @} */ |
---|
703 | |
---|
704 | /** |
---|
705 | * @name Disk Driver Functions |
---|
706 | * @{ |
---|
707 | */ |
---|
708 | |
---|
709 | static int sd_card_disk_block_read( sd_card_driver_entry *e, rtems_blkdev_request *r) |
---|
710 | { |
---|
711 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
712 | int rv = 0; |
---|
713 | uint32_t start_address = RTEMS_BLKDEV_START_BLOCK (r) << e->block_size_shift; |
---|
714 | uint32_t i = 0; |
---|
715 | |
---|
716 | #ifdef DEBUG |
---|
717 | /* Check request */ |
---|
718 | if (r->bufs[0].block >= e->block_number) { |
---|
719 | RTEMS_SYSLOG_ERROR( "Start block number out of range"); |
---|
720 | return -RTEMS_INTERNAL_ERROR; |
---|
721 | } else if (r->bufnum > e->block_number - RTEMS_BLKDEV_START_BLOCK (r)) { |
---|
722 | RTEMS_SYSLOG_ERROR( "Block count out of range"); |
---|
723 | return -RTEMS_INTERNAL_ERROR; |
---|
724 | } |
---|
725 | #endif /* DEBUG */ |
---|
726 | |
---|
727 | /* Start */ |
---|
728 | sc = sd_card_start( e); |
---|
729 | RTEMS_CLEANUP_SC_RV( sc, rv, sd_card_disk_block_read_cleanup, "Start"); |
---|
730 | |
---|
731 | if (r->bufnum == 1) { |
---|
732 | #ifdef DEBUG |
---|
733 | /* Check buffer */ |
---|
734 | if (r->bufs [0].length != e->block_size) { |
---|
735 | RTEMS_DO_CLEANUP_RV( -RTEMS_INTERNAL_ERROR, rv, sd_card_disk_block_read_cleanup, "Buffer and disk block size are not equal"); |
---|
736 | } |
---|
737 | RTEMS_DEBUG_PRINT( "[01:01]: buffer = 0x%08x, size = %u\n", r->bufs [0].buffer, r->bufs [0].length); |
---|
738 | #endif /* DEBUG */ |
---|
739 | |
---|
740 | /* Single block read */ |
---|
741 | rv = sd_card_send_command( e, SD_CARD_CMD_READ_SINGLE_BLOCK, start_address); |
---|
742 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_cleanup, "Send: SD_CARD_CMD_READ_SINGLE_BLOCK"); |
---|
743 | rv = sd_card_read( e, SD_CARD_START_BLOCK_SINGLE_BLOCK_READ, (uint8_t *) r->bufs [0].buffer, (int) e->block_size); |
---|
744 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_cleanup, "Read: SD_CARD_CMD_READ_SINGLE_BLOCK"); |
---|
745 | } else { |
---|
746 | /* Start multiple block read */ |
---|
747 | rv = sd_card_send_command( e, SD_CARD_CMD_READ_MULTIPLE_BLOCK, start_address); |
---|
748 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_stop_cleanup, "Send: SD_CARD_CMD_READ_MULTIPLE_BLOCK"); |
---|
749 | |
---|
750 | /* Multiple block read */ |
---|
751 | for (i = 0; i < r->bufnum; ++i) { |
---|
752 | #ifdef DEBUG |
---|
753 | /* Check buffer */ |
---|
754 | if (r->bufs [i].length != e->block_size) { |
---|
755 | RTEMS_DO_CLEANUP_RV( -RTEMS_INTERNAL_ERROR, rv, sd_card_disk_block_read_stop_cleanup, "Buffer and disk block size are not equal"); |
---|
756 | } |
---|
757 | RTEMS_DEBUG_PRINT( "[%02u:%02u]: buffer = 0x%08x, size = %u\n", i + 1, r->bufnum, r->bufs [i].buffer, r->bufs [i].length); |
---|
758 | #endif /* DEBUG */ |
---|
759 | |
---|
760 | rv = sd_card_read( e, SD_CARD_START_BLOCK_MULTIPLE_BLOCK_READ, (uint8_t *) r->bufs [i].buffer, (int) e->block_size); |
---|
761 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_stop_cleanup, "Read block"); |
---|
762 | } |
---|
763 | |
---|
764 | /* Stop multiple block read */ |
---|
765 | rv = sd_card_stop_multiple_block_read( e); |
---|
766 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_cleanup, "Stop multiple block read"); |
---|
767 | } |
---|
768 | |
---|
769 | /* Stop */ |
---|
770 | sc = sd_card_stop( e); |
---|
771 | RTEMS_CHECK_SC_RV( sc, "Stop"); |
---|
772 | |
---|
773 | /* Done */ |
---|
774 | r->req_done( r->done_arg, RTEMS_SUCCESSFUL, 0); |
---|
775 | |
---|
776 | return 0; |
---|
777 | |
---|
778 | sd_card_disk_block_read_stop_cleanup: |
---|
779 | |
---|
780 | /* Stop multiple block read */ |
---|
781 | sd_card_stop_multiple_block_read( e); |
---|
782 | |
---|
783 | sd_card_disk_block_read_cleanup: |
---|
784 | |
---|
785 | /* Stop */ |
---|
786 | sd_card_stop( e); |
---|
787 | |
---|
788 | /* Done */ |
---|
789 | r->req_done( r->done_arg, RTEMS_IO_ERROR, 0); |
---|
790 | |
---|
791 | return rv; |
---|
792 | } |
---|
793 | |
---|
794 | static int sd_card_disk_block_write( sd_card_driver_entry *e, rtems_blkdev_request *r) |
---|
795 | { |
---|
796 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
797 | int rv = 0; |
---|
798 | uint32_t start_address = RTEMS_BLKDEV_START_BLOCK (r) << e->block_size_shift; |
---|
799 | uint32_t i = 0; |
---|
800 | |
---|
801 | #ifdef DEBUG |
---|
802 | /* Check request */ |
---|
803 | if (r->bufs[0].block >= e->block_number) { |
---|
804 | RTEMS_SYSLOG_ERROR( "Start block number out of range"); |
---|
805 | return -RTEMS_INTERNAL_ERROR; |
---|
806 | } else if (r->bufnum > e->block_number - RTEMS_BLKDEV_START_BLOCK (r)) { |
---|
807 | RTEMS_SYSLOG_ERROR( "Block count out of range"); |
---|
808 | return -RTEMS_INTERNAL_ERROR; |
---|
809 | } |
---|
810 | #endif /* DEBUG */ |
---|
811 | |
---|
812 | /* Start */ |
---|
813 | sc = sd_card_start( e); |
---|
814 | RTEMS_CLEANUP_SC_RV( sc, rv, sd_card_disk_block_write_cleanup, "Start"); |
---|
815 | |
---|
816 | if (r->bufnum == 1) { |
---|
817 | #ifdef DEBUG |
---|
818 | /* Check buffer */ |
---|
819 | if (r->bufs [0].length != e->block_size) { |
---|
820 | RTEMS_DO_CLEANUP_RV( -RTEMS_INTERNAL_ERROR, rv, sd_card_disk_block_write_cleanup, "Buffer and disk block size are not equal"); |
---|
821 | } |
---|
822 | RTEMS_DEBUG_PRINT( "[01:01]: buffer = 0x%08x, size = %u\n", r->bufs [0].buffer, r->bufs [0].length); |
---|
823 | #endif /* DEBUG */ |
---|
824 | |
---|
825 | /* Single block write */ |
---|
826 | rv = sd_card_send_command( e, SD_CARD_CMD_WRITE_BLOCK, start_address); |
---|
827 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_cleanup, "Send: SD_CARD_CMD_WRITE_BLOCK"); |
---|
828 | rv = sd_card_write( e, SD_CARD_START_BLOCK_SINGLE_BLOCK_WRITE, (uint8_t *) r->bufs [0].buffer, (int) e->block_size); |
---|
829 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_cleanup, "Write: SD_CARD_CMD_WRITE_BLOCK"); |
---|
830 | } else { |
---|
831 | /* Start multiple block write */ |
---|
832 | rv = sd_card_send_command( e, SD_CARD_CMD_WRITE_MULTIPLE_BLOCK, start_address); |
---|
833 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_stop_cleanup, "Send: SD_CARD_CMD_WRITE_MULTIPLE_BLOCK"); |
---|
834 | |
---|
835 | /* Multiple block write */ |
---|
836 | for (i = 0; i < r->bufnum; ++i) { |
---|
837 | #ifdef DEBUG |
---|
838 | /* Check buffer */ |
---|
839 | if (r->bufs [i].length != e->block_size) { |
---|
840 | RTEMS_DO_CLEANUP_RV( -RTEMS_INTERNAL_ERROR, rv, sd_card_disk_block_write_stop_cleanup, "Buffer and disk block size are not equal"); |
---|
841 | } |
---|
842 | RTEMS_DEBUG_PRINT( "[%02u:%02u]: buffer = 0x%08x, size = %u\n", i + 1, r->bufnum, r->bufs [i].buffer, r->bufs [i].length); |
---|
843 | #endif /* DEBUG */ |
---|
844 | |
---|
845 | rv = sd_card_write( e, SD_CARD_START_BLOCK_MULTIPLE_BLOCK_WRITE, (uint8_t *) r->bufs [i].buffer, (int) e->block_size); |
---|
846 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_stop_cleanup, "Write block"); |
---|
847 | } |
---|
848 | |
---|
849 | /* Stop multiple block write */ |
---|
850 | rv = sd_card_stop_multiple_block_write( e); |
---|
851 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_cleanup, "Stop multiple block write"); |
---|
852 | } |
---|
853 | |
---|
854 | /* Get card status */ |
---|
855 | rv = sd_card_send_command( e, SD_CARD_CMD_SEND_STATUS, 0); |
---|
856 | RTEMS_CHECK_RV( rv, "Send: SD_CARD_CMD_SEND_STATUS"); |
---|
857 | |
---|
858 | /* Stop */ |
---|
859 | sc = sd_card_stop( e); |
---|
860 | RTEMS_CHECK_SC_RV( sc, "Stop"); |
---|
861 | |
---|
862 | /* Done */ |
---|
863 | r->req_done( r->done_arg, RTEMS_SUCCESSFUL, 0); |
---|
864 | |
---|
865 | return 0; |
---|
866 | |
---|
867 | sd_card_disk_block_write_stop_cleanup: |
---|
868 | |
---|
869 | /* Stop multiple block write */ |
---|
870 | sd_card_stop_multiple_block_write( e); |
---|
871 | |
---|
872 | sd_card_disk_block_write_cleanup: |
---|
873 | |
---|
874 | /* Get card status */ |
---|
875 | rv = sd_card_send_command( e, SD_CARD_CMD_SEND_STATUS, 0); |
---|
876 | RTEMS_CHECK_RV( rv, "Send: SD_CARD_CMD_SEND_STATUS"); |
---|
877 | |
---|
878 | /* Stop */ |
---|
879 | sd_card_stop( e); |
---|
880 | |
---|
881 | /* Done */ |
---|
882 | r->req_done( r->done_arg, RTEMS_IO_ERROR, 0); |
---|
883 | |
---|
884 | return rv; |
---|
885 | } |
---|
886 | |
---|
887 | static int sd_card_disk_ioctl( dev_t dev, uint32_t req, void *arg) |
---|
888 | { |
---|
889 | RTEMS_DEBUG_PRINT( "dev = %u, req = %u, arg = 0x08%x\n", dev, req, arg); |
---|
890 | if (req == RTEMS_BLKIO_REQUEST) { |
---|
891 | rtems_device_minor_number minor = rtems_filesystem_dev_minor_t( dev); |
---|
892 | sd_card_driver_entry *e = &sd_card_driver_table [minor]; |
---|
893 | rtems_blkdev_request *r = (rtems_blkdev_request *) arg; |
---|
894 | switch (r->req) { |
---|
895 | case RTEMS_BLKDEV_REQ_READ: |
---|
896 | return sd_card_disk_block_read( e, r); |
---|
897 | case RTEMS_BLKDEV_REQ_WRITE: |
---|
898 | return sd_card_disk_block_write( e, r); |
---|
899 | default: |
---|
900 | errno = EBADRQC; |
---|
901 | return -1; |
---|
902 | } |
---|
903 | } else if (req == RTEMS_BLKDEV_CAPABILITIES) { |
---|
904 | *(uint32_t*) arg = RTEMS_BLKDEV_CAP_MULTISECTOR_CONT; |
---|
905 | return 0; |
---|
906 | } else { |
---|
907 | errno = EBADRQC; |
---|
908 | return -1; |
---|
909 | } |
---|
910 | } |
---|
911 | |
---|
912 | static rtems_status_code sd_card_disk_init( rtems_device_major_number major, rtems_device_minor_number minor, void *arg) |
---|
913 | { |
---|
914 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
915 | sd_card_driver_entry *e = NULL; |
---|
916 | dev_t dev = 0; |
---|
917 | |
---|
918 | /* Initialize disk IO */ |
---|
919 | sc = rtems_disk_io_initialize(); |
---|
920 | RTEMS_CHECK_SC( sc, "Initialize RTEMS disk IO"); |
---|
921 | |
---|
922 | for (minor = 0; minor < sd_card_driver_table_size; ++minor) { |
---|
923 | e = &sd_card_driver_table [minor]; |
---|
924 | |
---|
925 | /* Initialize SD Card */ |
---|
926 | sc = sd_card_init( e); |
---|
927 | RTEMS_CHECK_SC( sc, "Initialize SD Card"); |
---|
928 | |
---|
929 | /* Create disk device */ |
---|
930 | dev = rtems_filesystem_make_dev_t( major, minor); |
---|
931 | sc = rtems_disk_create_phys( dev, (int) e->block_size, (int) e->block_number, sd_card_disk_ioctl, e->device_name); |
---|
932 | RTEMS_CHECK_SC( sc, "Create disk device"); |
---|
933 | } |
---|
934 | |
---|
935 | return RTEMS_SUCCESSFUL; |
---|
936 | } |
---|
937 | |
---|
938 | /** @} */ |
---|
939 | |
---|
940 | static const rtems_driver_address_table sd_card_disk_ops = { |
---|
941 | .initialization_entry = sd_card_disk_init, |
---|
942 | .open_entry = rtems_blkdev_generic_open, |
---|
943 | .close_entry = rtems_blkdev_generic_close, |
---|
944 | .read_entry = rtems_blkdev_generic_read, |
---|
945 | .write_entry = rtems_blkdev_generic_write, |
---|
946 | .control_entry = rtems_blkdev_generic_ioctl |
---|
947 | }; |
---|
948 | |
---|
949 | rtems_status_code sd_card_register( void) |
---|
950 | { |
---|
951 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
952 | rtems_device_major_number major = 0; |
---|
953 | |
---|
954 | sc = rtems_io_register_driver( 0, &sd_card_disk_ops, &major); |
---|
955 | RTEMS_CHECK_SC( sc, "Register disk SD Card driver"); |
---|
956 | |
---|
957 | return RTEMS_SUCCESSFUL; |
---|
958 | } |
---|