[e0ecc66d] | 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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[0e27119] | 15 | * The license and distribution terms for this file may be |
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| 16 | * found in the file LICENSE in this distribution or at |
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| 17 | * http://www.rtems.com/license/LICENSE. |
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[e0ecc66d] | 18 | */ |
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| 19 | |
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[574fb67] | 20 | #include <stdio.h> |
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[7660e8b3] | 21 | #include <string.h> |
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[574fb67] | 22 | #include <errno.h> |
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[be78809] | 23 | #include <inttypes.h> |
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[574fb67] | 24 | |
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[e0ecc66d] | 25 | #include <rtems.h> |
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| 26 | #include <rtems/libi2c.h> |
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| 27 | #include <rtems/libio.h> |
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| 28 | #include <rtems/diskdevs.h> |
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[94d7bd7] | 29 | #include <rtems/blkdev.h> |
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[e0ecc66d] | 30 | |
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| 31 | #include <libchip/spi-sd-card.h> |
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| 32 | |
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| 33 | #include <rtems/status-checks.h> |
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| 34 | |
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| 35 | /** |
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| 36 | * @name Integer to and from Byte-Stream Converter |
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| 37 | * @{ |
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| 38 | */ |
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| 39 | |
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| 40 | static inline uint16_t sd_card_get_uint16( const uint8_t *s) |
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| 41 | { |
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[dccd351] | 42 | return (uint16_t) ((s [0] << 8) | s [1]); |
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[e0ecc66d] | 43 | } |
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| 44 | |
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| 45 | static inline uint32_t sd_card_get_uint32( const uint8_t *s) |
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| 46 | { |
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[dccd351] | 47 | return ((uint32_t) s [0] << 24) | ((uint32_t) s [1] << 16) | ((uint32_t) s [2] << 8) | (uint32_t) s [3]; |
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[e0ecc66d] | 48 | } |
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| 49 | |
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| 50 | static inline void sd_card_put_uint16( uint16_t v, uint8_t *s) |
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| 51 | { |
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[dccd351] | 52 | *s++ = (uint8_t) (v >> 8); |
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| 53 | *s = (uint8_t) (v); |
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[e0ecc66d] | 54 | } |
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| 55 | |
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| 56 | static inline void sd_card_put_uint32( uint32_t v, uint8_t *s) |
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| 57 | { |
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[dccd351] | 58 | *s++ = (uint8_t) (v >> 24); |
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| 59 | *s++ = (uint8_t) (v >> 16); |
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| 60 | *s++ = (uint8_t) (v >> 8); |
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| 61 | *s = (uint8_t) (v); |
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[e0ecc66d] | 62 | } |
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| 63 | |
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| 64 | /** @} */ |
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| 65 | |
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| 66 | #define SD_CARD_BUSY_TOKEN 0 |
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| 67 | |
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| 68 | #define SD_CARD_BLOCK_SIZE_DEFAULT 512 |
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| 69 | |
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| 70 | #define SD_CARD_COMMAND_RESPONSE_START 7 |
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| 71 | |
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| 72 | /** |
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| 73 | * @name Commands |
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| 74 | * @{ |
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| 75 | */ |
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| 76 | |
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| 77 | #define SD_CARD_CMD_GO_IDLE_STATE 0 |
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| 78 | #define SD_CARD_CMD_SEND_OP_COND 1 |
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[ca5bcd8] | 79 | #define SD_CARD_CMD_SEND_IF_COND 8 |
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[e0ecc66d] | 80 | #define SD_CARD_CMD_SEND_CSD 9 |
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| 81 | #define SD_CARD_CMD_SEND_CID 10 |
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| 82 | #define SD_CARD_CMD_STOP_TRANSMISSION 12 |
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| 83 | #define SD_CARD_CMD_SEND_STATUS 13 |
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| 84 | #define SD_CARD_CMD_SET_BLOCKLEN 16 |
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| 85 | #define SD_CARD_CMD_READ_SINGLE_BLOCK 17 |
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| 86 | #define SD_CARD_CMD_READ_MULTIPLE_BLOCK 18 |
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| 87 | #define SD_CARD_CMD_SET_BLOCK_COUNT 23 |
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| 88 | #define SD_CARD_CMD_WRITE_BLOCK 24 |
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| 89 | #define SD_CARD_CMD_WRITE_MULTIPLE_BLOCK 25 |
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| 90 | #define SD_CARD_CMD_PROGRAM_CSD 27 |
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| 91 | #define SD_CARD_CMD_SET_WRITE_PROT 28 |
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| 92 | #define SD_CARD_CMD_CLR_WRITE_PROT 29 |
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| 93 | #define SD_CARD_CMD_SEND_WRITE_PROT 30 |
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| 94 | #define SD_CARD_CMD_TAG_SECTOR_START 32 |
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| 95 | #define SD_CARD_CMD_TAG_SECTOR_END 33 |
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| 96 | #define SD_CARD_CMD_UNTAG_SECTOR 34 |
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| 97 | #define SD_CARD_CMD_TAG_ERASE_GROUP_START 35 |
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| 98 | #define SD_CARD_CMD_TAG_ERASE_GROUP_END 36 |
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| 99 | #define SD_CARD_CMD_UNTAG_ERASE_GROUP 37 |
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| 100 | #define SD_CARD_CMD_ERASE 38 |
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| 101 | #define SD_CARD_CMD_LOCK_UNLOCK 42 |
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| 102 | #define SD_CARD_CMD_APP_CMD 55 |
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| 103 | #define SD_CARD_CMD_GEN_CND 56 |
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| 104 | #define SD_CARD_CMD_READ_OCR 58 |
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| 105 | #define SD_CARD_CMD_CRC_ON_OFF 59 |
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| 106 | |
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| 107 | /** @} */ |
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| 108 | |
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| 109 | /** |
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| 110 | * @name Application Commands |
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| 111 | * @{ |
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| 112 | */ |
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| 113 | |
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| 114 | #define SD_CARD_ACMD_SD_SEND_OP_COND 41 |
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| 115 | |
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| 116 | /** @} */ |
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| 117 | |
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[ca5bcd8] | 118 | /** |
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| 119 | * @name Command Flags |
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| 120 | * @{ |
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| 121 | */ |
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| 122 | |
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| 123 | #define SD_CARD_FLAG_HCS 0x40000000U |
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| 124 | |
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| 125 | #define SD_CARD_FLAG_VHS_2_7_TO_3_3 0x00000100U |
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| 126 | |
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| 127 | #define SD_CARD_FLAG_CHECK_PATTERN 0x000000aaU |
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| 128 | |
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| 129 | /** @} */ |
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| 130 | |
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[e0ecc66d] | 131 | /** |
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| 132 | * @name Command Fields |
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| 133 | * @{ |
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| 134 | */ |
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| 135 | |
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[dccd351] | 136 | #define SD_CARD_COMMAND_SET_COMMAND( c, cmd) (c) [1] = (uint8_t) (0x40 + ((cmd) & 0x3f)) |
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[ca5bcd8] | 137 | |
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[e0ecc66d] | 138 | #define SD_CARD_COMMAND_SET_ARGUMENT( c, arg) sd_card_put_uint32( (arg), &((c) [2])) |
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[ca5bcd8] | 139 | |
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| 140 | #define SD_CARD_COMMAND_SET_CRC7( c, crc7) ((c) [6] = ((crc7) << 1) | 1U) |
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[e0ecc66d] | 141 | |
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| 142 | #define SD_CARD_COMMAND_GET_CRC7( c) ((c) [6] >> 1) |
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| 143 | |
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| 144 | /** @} */ |
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| 145 | |
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| 146 | /** |
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| 147 | * @name Response Fields |
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| 148 | * @{ |
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| 149 | */ |
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| 150 | |
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| 151 | #define SD_CARD_IS_RESPONSE( r) (((r) & 0x80) == 0) |
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| 152 | |
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| 153 | #define SD_CARD_IS_ERRORLESS_RESPONSE( r) (((r) & 0x7e) == 0) |
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| 154 | |
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| 155 | #define SD_CARD_IS_NOT_IDLE_RESPONSE( r) (((r) & 0x81) == 0) |
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| 156 | |
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| 157 | #define SD_CARD_IS_DATA_ERROR( r) (((r) & 0xe0) == 0) |
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| 158 | |
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| 159 | #define SD_CARD_IS_DATA_REJECTED( r) (((r) & 0x1f) != 0x05) |
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| 160 | |
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| 161 | /** @} */ |
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| 162 | |
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| 163 | /** |
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| 164 | * @name Card Identification |
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| 165 | * @{ |
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| 166 | */ |
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| 167 | |
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| 168 | #define SD_CARD_CID_SIZE 16 |
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| 169 | |
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| 170 | #define SD_CARD_CID_GET_MID( cid) ((cid) [0]) |
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| 171 | #define SD_CARD_CID_GET_OID( cid) sd_card_get_uint16( cid + 1) |
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[be78809] | 172 | #define SD_CARD_CID_GET_PNM( cid, i) ((char) (cid) [3 + (i)]) |
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[e0ecc66d] | 173 | #define SD_CARD_CID_GET_PRV( cid) ((cid) [9]) |
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| 174 | #define SD_CARD_CID_GET_PSN( cid) sd_card_get_uint32( cid + 10) |
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| 175 | #define SD_CARD_CID_GET_MDT( cid) ((cid) [14]) |
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| 176 | #define SD_CARD_CID_GET_CRC7( cid) ((cid) [15] >> 1) |
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| 177 | |
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| 178 | /** @} */ |
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| 179 | |
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| 180 | /** |
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| 181 | * @name Card Specific Data |
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| 182 | * @{ |
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| 183 | */ |
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| 184 | |
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| 185 | #define SD_CARD_CSD_SIZE 16 |
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| 186 | |
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| 187 | #define SD_CARD_CSD_GET_CSD_STRUCTURE( csd) ((csd) [0] >> 6) |
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| 188 | #define SD_CARD_CSD_GET_SPEC_VERS( csd) (((csd) [0] >> 2) & 0xf) |
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| 189 | #define SD_CARD_CSD_GET_TAAC( csd) ((csd) [1]) |
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[dccd351] | 190 | #define SD_CARD_CSD_GET_NSAC( csd) ((uint32_t) (csd) [2]) |
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[e0ecc66d] | 191 | #define SD_CARD_CSD_GET_TRAN_SPEED( csd) ((csd) [3]) |
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[ca5bcd8] | 192 | #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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[e0ecc66d] | 193 | #define SD_CARD_CSD_GET_C_SIZE_MULT( csd) ((((csd) [9] & 0x3) << 1) + (((csd) [10] >> 7) & 0x1)) |
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[dccd351] | 194 | #define SD_CARD_CSD_GET_READ_BLK_LEN( csd) ((uint32_t) (csd) [5] & 0xf) |
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[ca5bcd8] | 195 | #define SD_CARD_CSD_GET_WRITE_BLK_LEN( csd) ((((uint32_t) (csd) [12] & 0x3) << 2) + ((((uint32_t) (csd) [13]) >> 6) & 0x3)) |
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| 196 | #define SD_CARD_CSD_1_GET_C_SIZE( csd) ((((uint32_t) (csd) [7] & 0x3f) << 16) + (((uint32_t) (csd) [8]) << 8) + (uint32_t) (csd) [9]) |
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[e0ecc66d] | 197 | |
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| 198 | /** @} */ |
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| 199 | |
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| 200 | #define SD_CARD_INVALIDATE_RESPONSE_INDEX( e) e->response_index = SD_CARD_COMMAND_SIZE |
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| 201 | |
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| 202 | /** |
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| 203 | * @name Data Start and Stop Tokens |
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| 204 | * @{ |
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| 205 | */ |
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| 206 | |
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| 207 | #define SD_CARD_START_BLOCK_SINGLE_BLOCK_READ 0xfe |
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| 208 | #define SD_CARD_START_BLOCK_MULTIPLE_BLOCK_READ 0xfe |
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| 209 | #define SD_CARD_START_BLOCK_SINGLE_BLOCK_WRITE 0xfe |
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| 210 | #define SD_CARD_START_BLOCK_MULTIPLE_BLOCK_WRITE 0xfc |
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| 211 | #define SD_CARD_STOP_TRANSFER_MULTIPLE_BLOCK_WRITE 0xfd |
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| 212 | |
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| 213 | /** @} */ |
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| 214 | |
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| 215 | /** |
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| 216 | * @name Card Specific Data Functions |
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| 217 | * @{ |
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| 218 | */ |
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| 219 | |
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| 220 | static inline uint32_t sd_card_block_number( const uint8_t *csd) |
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| 221 | { |
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| 222 | uint32_t size = SD_CARD_CSD_GET_C_SIZE( csd); |
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[dccd351] | 223 | uint32_t mult = 1U << (SD_CARD_CSD_GET_C_SIZE_MULT( csd) + 2); |
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[e0ecc66d] | 224 | return (size + 1) * mult; |
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| 225 | } |
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| 226 | |
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| 227 | static inline uint32_t sd_card_capacity( const uint8_t *csd) |
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| 228 | { |
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[dccd351] | 229 | uint32_t block_size = 1U << SD_CARD_CSD_GET_READ_BLK_LEN( csd); |
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[e0ecc66d] | 230 | return sd_card_block_number( csd) * block_size; |
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| 231 | } |
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| 232 | |
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| 233 | static inline uint32_t sd_card_transfer_speed( const uint8_t *csd) |
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| 234 | { |
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| 235 | uint32_t s = SD_CARD_CSD_GET_TRAN_SPEED( csd); |
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| 236 | uint32_t e = s & 0x7; |
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| 237 | uint32_t m = s >> 3; |
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| 238 | switch (e) { |
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| 239 | case 0: s = 10000; break; |
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| 240 | case 1: s = 100000; break; |
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| 241 | case 2: s = 1000000; break; |
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| 242 | case 3: s = 10000000; break; |
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| 243 | default: s = 0; break; |
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| 244 | } |
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| 245 | switch (m) { |
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| 246 | case 1: s *= 10; break; |
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| 247 | case 2: s *= 12; break; |
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| 248 | case 3: s *= 13; break; |
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| 249 | case 4: s *= 15; break; |
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| 250 | case 5: s *= 20; break; |
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| 251 | case 6: s *= 25; break; |
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| 252 | case 7: s *= 30; break; |
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| 253 | case 8: s *= 35; break; |
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| 254 | case 9: s *= 40; break; |
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| 255 | case 10: s *= 45; break; |
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| 256 | case 11: s *= 50; break; |
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| 257 | case 12: s *= 55; break; |
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| 258 | case 13: s *= 60; break; |
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| 259 | case 14: s *= 70; break; |
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| 260 | case 15: s *= 80; break; |
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| 261 | default: s *= 0; break; |
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| 262 | } |
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| 263 | return s; |
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| 264 | } |
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| 265 | |
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| 266 | static inline uint32_t sd_card_access_time( const uint8_t *csd) |
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| 267 | { |
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| 268 | uint32_t ac = SD_CARD_CSD_GET_TAAC( csd); |
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| 269 | uint32_t e = ac & 0x7; |
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| 270 | uint32_t m = ac >> 3; |
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| 271 | switch (e) { |
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| 272 | case 0: ac = 1; break; |
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| 273 | case 1: ac = 10; break; |
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| 274 | case 2: ac = 100; break; |
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| 275 | case 3: ac = 1000; break; |
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| 276 | case 4: ac = 10000; break; |
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| 277 | case 5: ac = 100000; break; |
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| 278 | case 6: ac = 1000000; break; |
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| 279 | case 7: ac = 10000000; break; |
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| 280 | default: ac = 0; break; |
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| 281 | } |
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| 282 | switch (m) { |
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| 283 | case 1: ac *= 10; break; |
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| 284 | case 2: ac *= 12; break; |
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| 285 | case 3: ac *= 13; break; |
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| 286 | case 4: ac *= 15; break; |
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| 287 | case 5: ac *= 20; break; |
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| 288 | case 6: ac *= 25; break; |
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| 289 | case 7: ac *= 30; break; |
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| 290 | case 8: ac *= 35; break; |
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| 291 | case 9: ac *= 40; break; |
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| 292 | case 10: ac *= 45; break; |
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| 293 | case 11: ac *= 50; break; |
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| 294 | case 12: ac *= 55; break; |
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| 295 | case 13: ac *= 60; break; |
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| 296 | case 14: ac *= 70; break; |
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| 297 | case 15: ac *= 80; break; |
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| 298 | default: ac *= 0; break; |
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| 299 | } |
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| 300 | return ac / 10; |
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| 301 | } |
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| 302 | |
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| 303 | static inline uint32_t sd_card_max_access_time( const uint8_t *csd, uint32_t transfer_speed) |
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| 304 | { |
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| 305 | uint64_t ac = sd_card_access_time( csd); |
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[58eccd0] | 306 | uint32_t ac_100ms = transfer_speed / 80; |
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[e0ecc66d] | 307 | uint32_t n = SD_CARD_CSD_GET_NSAC( csd) * 100; |
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[58eccd0] | 308 | /* ac is in ns, transfer_speed in bps, max_access_time in bytes. |
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| 309 | max_access_time is 100 times typical access time (taac+nsac) */ |
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| 310 | ac = ac * transfer_speed / 80000000; |
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| 311 | ac = ac + 100*n; |
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| 312 | if ((uint32_t)ac > ac_100ms) |
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| 313 | return ac_100ms; |
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| 314 | else |
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| 315 | return (uint32_t)ac; |
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[e0ecc66d] | 316 | } |
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| 317 | |
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| 318 | /** @} */ |
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| 319 | |
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[07109c2] | 320 | /** |
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| 321 | * @name CRC functions |
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| 322 | * |
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| 323 | * Based on http://en.wikipedia.org/wiki/Computation_of_CRC |
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| 324 | * |
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| 325 | * @{ |
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| 326 | */ |
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| 327 | |
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[fa011f35] | 328 | static uint8_t sd_card_compute_crc7 (uint8_t *data, size_t len) |
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[07109c2] | 329 | { |
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| 330 | uint8_t e, f, crc; |
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| 331 | size_t i; |
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| 332 | |
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| 333 | crc = 0; |
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| 334 | for (i = 0; i < len; i++) { |
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| 335 | e = crc ^ data[i]; |
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| 336 | f = e ^ (e >> 4) ^ (e >> 7); |
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| 337 | crc = (f << 1) ^ (f << 4); |
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| 338 | } |
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| 339 | return crc >> 1; |
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| 340 | } |
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| 341 | |
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[fa011f35] | 342 | static uint16_t sd_card_compute_crc16 (uint8_t *data, size_t len) |
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[07109c2] | 343 | { |
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| 344 | uint8_t s, t; |
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| 345 | uint16_t crc; |
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| 346 | size_t i; |
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| 347 | |
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| 348 | crc = 0; |
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| 349 | for (i = 0; i < len; i++) { |
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| 350 | s = data[i] ^ (crc >> 8); |
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| 351 | t = s ^ (s >> 4); |
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| 352 | crc = (crc << 8) ^ t ^ (t << 5) ^ (t << 12); |
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| 353 | } |
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| 354 | return crc; |
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| 355 | } |
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| 356 | |
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| 357 | /** @} */ |
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| 358 | |
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[e0ecc66d] | 359 | /** |
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| 360 | * @name Communication Functions |
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| 361 | * @{ |
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| 362 | */ |
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| 363 | |
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| 364 | static inline int sd_card_query( sd_card_driver_entry *e, uint8_t *in, int n) |
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| 365 | { |
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[9814d2dd] | 366 | return rtems_libi2c_read_bytes( e->bus, in, n); |
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[e0ecc66d] | 367 | } |
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| 368 | |
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| 369 | static int sd_card_wait( sd_card_driver_entry *e) |
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| 370 | { |
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| 371 | int rv = 0; |
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| 372 | int r = 0; |
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| 373 | int n = 2; |
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[58eccd0] | 374 | /* For writes, the timeout is 2.5 times that of reads; since we |
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| 375 | don't know if it is a write or read, assume write. |
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| 376 | FIXME should actually look at R2W_FACTOR for non-HC cards. */ |
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| 377 | int retries = e->n_ac_max * 25 / 10; |
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[5e649e5] | 378 | /* n_ac_max/100 is supposed to be the average waiting time. To |
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[0596902] | 379 | approximate this, we start with waiting n_ac_max/150 and |
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[5e649e5] | 380 | gradually increase the waiting time. */ |
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| 381 | int wait_time_bytes = (retries + 149) / 150; |
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[e0ecc66d] | 382 | while (e->busy) { |
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| 383 | /* Query busy tokens */ |
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| 384 | rv = sd_card_query( e, e->response, n); |
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[f049983] | 385 | RTEMS_CHECK_RV( rv, "Busy"); |
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[e0ecc66d] | 386 | |
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| 387 | /* Search for non busy tokens */ |
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| 388 | for (r = 0; r < n; ++r) { |
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| 389 | if (e->response [r] != SD_CARD_BUSY_TOKEN) { |
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| 390 | e->busy = false; |
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| 391 | return 0; |
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| 392 | } |
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| 393 | } |
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[58eccd0] | 394 | retries -= n; |
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| 395 | if (retries <= 0) { |
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| 396 | return -RTEMS_TIMEOUT; |
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| 397 | } |
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[e0ecc66d] | 398 | |
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| 399 | if (e->schedule_if_busy) { |
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[5e649e5] | 400 | uint64_t wait_time_us = wait_time_bytes; |
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| 401 | wait_time_us *= 8000000; |
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| 402 | wait_time_us /= e->transfer_mode.baudrate; |
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| 403 | rtems_task_wake_after( RTEMS_MICROSECONDS_TO_TICKS(wait_time_us)); |
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| 404 | retries -= wait_time_bytes; |
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| 405 | wait_time_bytes = wait_time_bytes * 15 / 10; |
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| 406 | } else { |
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| 407 | n = SD_CARD_COMMAND_SIZE; |
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[e0ecc66d] | 408 | } |
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| 409 | } |
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| 410 | return 0; |
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| 411 | } |
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| 412 | |
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| 413 | static int sd_card_send_command( sd_card_driver_entry *e, uint32_t command, uint32_t argument) |
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| 414 | { |
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| 415 | int rv = 0; |
---|
[dccd351] | 416 | rtems_libi2c_read_write_t rw = { |
---|
| 417 | .rd_buf = e->response, |
---|
| 418 | .wr_buf = e->command, |
---|
| 419 | .byte_cnt = SD_CARD_COMMAND_SIZE |
---|
| 420 | }; |
---|
[e0ecc66d] | 421 | int r = 0; |
---|
[07109c2] | 422 | uint8_t crc7; |
---|
[e0ecc66d] | 423 | |
---|
| 424 | SD_CARD_INVALIDATE_RESPONSE_INDEX( e); |
---|
| 425 | |
---|
| 426 | /* Wait until card is not busy */ |
---|
| 427 | rv = sd_card_wait( e); |
---|
[f049983] | 428 | RTEMS_CHECK_RV( rv, "Wait"); |
---|
[e0ecc66d] | 429 | |
---|
| 430 | /* Write command and read response */ |
---|
| 431 | SD_CARD_COMMAND_SET_COMMAND( e->command, command); |
---|
| 432 | SD_CARD_COMMAND_SET_ARGUMENT( e->command, argument); |
---|
[07109c2] | 433 | crc7 = sd_card_compute_crc7( e->command + 1, 5); |
---|
| 434 | SD_CARD_COMMAND_SET_CRC7( e->command, crc7); |
---|
[9814d2dd] | 435 | rv = rtems_libi2c_ioctl( e->bus, RTEMS_LIBI2C_IOCTL_READ_WRITE, &rw); |
---|
[f049983] | 436 | RTEMS_CHECK_RV( rv, "Write command and read response"); |
---|
[e0ecc66d] | 437 | |
---|
| 438 | /* Check respose */ |
---|
| 439 | for (r = SD_CARD_COMMAND_RESPONSE_START; r < SD_CARD_COMMAND_SIZE; ++r) { |
---|
[f049983] | 440 | RTEMS_DEBUG_PRINT( "Token [%02u]: 0x%02x\n", r, e->response [r]); |
---|
[e0ecc66d] | 441 | e->response_index = r; |
---|
| 442 | if (SD_CARD_IS_RESPONSE( e->response [r])) { |
---|
| 443 | if (SD_CARD_IS_ERRORLESS_RESPONSE( e->response [r])) { |
---|
| 444 | return 0; |
---|
| 445 | } else { |
---|
[f049983] | 446 | RTEMS_SYSLOG_ERROR( "Command error [%02i]: 0x%02" PRIx8 "\n", r, e->response [r]); |
---|
[e0ecc66d] | 447 | goto sd_card_send_command_error; |
---|
| 448 | } |
---|
| 449 | } else if (e->response [r] != SD_CARD_IDLE_TOKEN) { |
---|
[f049983] | 450 | RTEMS_SYSLOG_ERROR( "Unexpected token [%02i]: 0x%02" PRIx8 "\n", r, e->response [r]); |
---|
[e0ecc66d] | 451 | goto sd_card_send_command_error; |
---|
| 452 | } |
---|
| 453 | } |
---|
| 454 | |
---|
[f049983] | 455 | RTEMS_SYSLOG_ERROR( "Timeout\n"); |
---|
[e0ecc66d] | 456 | |
---|
| 457 | sd_card_send_command_error: |
---|
| 458 | |
---|
[f049983] | 459 | RTEMS_SYSLOG_ERROR( "Response:"); |
---|
[e0ecc66d] | 460 | for (r = 0; r < SD_CARD_COMMAND_SIZE; ++r) { |
---|
| 461 | if (e->response_index == r) { |
---|
[f049983] | 462 | RTEMS_SYSLOG_PRINT( " %02" PRIx8 ":[%02" PRIx8 "]", e->command [r], e->response [r]); |
---|
[e0ecc66d] | 463 | } else { |
---|
[f049983] | 464 | RTEMS_SYSLOG_PRINT( " %02" PRIx8 ":%02" PRIx8 "", e->command [r], e->response [r]); |
---|
[e0ecc66d] | 465 | } |
---|
| 466 | } |
---|
[f049983] | 467 | RTEMS_SYSLOG_PRINT( "\n"); |
---|
[e0ecc66d] | 468 | |
---|
| 469 | return -RTEMS_IO_ERROR; |
---|
| 470 | } |
---|
| 471 | |
---|
[ca5bcd8] | 472 | static int sd_card_send_register_command( sd_card_driver_entry *e, uint32_t command, uint32_t argument, uint32_t *reg) |
---|
| 473 | { |
---|
| 474 | int rv = 0; |
---|
[07109c2] | 475 | uint8_t crc7; |
---|
[ca5bcd8] | 476 | |
---|
| 477 | rv = sd_card_send_command( e, command, argument); |
---|
| 478 | RTEMS_CHECK_RV( rv, "Send command"); |
---|
| 479 | |
---|
| 480 | if (e->response_index + 5 > SD_CARD_COMMAND_SIZE) { |
---|
| 481 | /* |
---|
| 482 | * TODO: If this happens in the wild we need to implement a |
---|
| 483 | * more sophisticated response query. |
---|
| 484 | */ |
---|
| 485 | RTEMS_SYSLOG_ERROR( "Unexpected response position\n"); |
---|
| 486 | return -RTEMS_IO_ERROR; |
---|
| 487 | } |
---|
| 488 | |
---|
[07109c2] | 489 | crc7 = sd_card_compute_crc7( e->response + e->response_index, 5); |
---|
[167c6ce] | 490 | if (crc7 != SD_CARD_COMMAND_GET_CRC7( e->response + e->response_index) && |
---|
| 491 | SD_CARD_COMMAND_GET_CRC7( e->response + e->response_index) != 0x7f) { |
---|
[07109c2] | 492 | RTEMS_SYSLOG_ERROR( "CRC check failed on register command\n"); |
---|
| 493 | return -RTEMS_IO_ERROR; |
---|
| 494 | } |
---|
| 495 | |
---|
[ca5bcd8] | 496 | *reg = sd_card_get_uint32( e->response + e->response_index + 1); |
---|
| 497 | |
---|
| 498 | return 0; |
---|
| 499 | } |
---|
| 500 | |
---|
[e0ecc66d] | 501 | static int sd_card_stop_multiple_block_read( sd_card_driver_entry *e) |
---|
| 502 | { |
---|
| 503 | int rv = 0; |
---|
[382f714] | 504 | uint8_t crc7; |
---|
[e0ecc66d] | 505 | |
---|
| 506 | SD_CARD_COMMAND_SET_COMMAND( e->command, SD_CARD_CMD_STOP_TRANSMISSION); |
---|
[382f714] | 507 | SD_CARD_COMMAND_SET_ARGUMENT( e->command, 0); |
---|
| 508 | /*crc7 = sd_card_compute_crc7( e->command + 1, 5);*/ |
---|
| 509 | crc7 = 0x30; /* Help compiler - command and argument are constants */ |
---|
| 510 | SD_CARD_COMMAND_SET_CRC7( e->command, crc7); |
---|
[9814d2dd] | 511 | rv = rtems_libi2c_write_bytes( e->bus, e->command, SD_CARD_COMMAND_SIZE); |
---|
[f049983] | 512 | RTEMS_CHECK_RV( rv, "Write stop transfer token"); |
---|
[e0ecc66d] | 513 | |
---|
| 514 | return 0; |
---|
| 515 | } |
---|
| 516 | |
---|
| 517 | static int sd_card_stop_multiple_block_write( sd_card_driver_entry *e) |
---|
| 518 | { |
---|
| 519 | int rv = 0; |
---|
| 520 | uint8_t stop_transfer [3] = { SD_CARD_IDLE_TOKEN, SD_CARD_STOP_TRANSFER_MULTIPLE_BLOCK_WRITE, SD_CARD_IDLE_TOKEN }; |
---|
| 521 | |
---|
| 522 | /* Wait until card is not busy */ |
---|
| 523 | rv = sd_card_wait( e); |
---|
[f049983] | 524 | RTEMS_CHECK_RV( rv, "Wait"); |
---|
[e0ecc66d] | 525 | |
---|
| 526 | /* Send stop token */ |
---|
[9814d2dd] | 527 | rv = rtems_libi2c_write_bytes( e->bus, stop_transfer, 3); |
---|
[f049983] | 528 | RTEMS_CHECK_RV( rv, "Write stop transfer token"); |
---|
[e0ecc66d] | 529 | |
---|
| 530 | /* Card is now busy */ |
---|
| 531 | e->busy = true; |
---|
| 532 | |
---|
| 533 | return 0; |
---|
| 534 | } |
---|
| 535 | |
---|
| 536 | static int sd_card_read( sd_card_driver_entry *e, uint8_t start_token, uint8_t *in, int n) |
---|
| 537 | { |
---|
| 538 | int rv = 0; |
---|
| 539 | |
---|
| 540 | /* Discard command response */ |
---|
| 541 | int r = e->response_index + 1; |
---|
| 542 | |
---|
| 543 | /* Standard response size */ |
---|
| 544 | int response_size = SD_CARD_COMMAND_SIZE; |
---|
| 545 | |
---|
[0596902] | 546 | /* Where the response is stored */ |
---|
| 547 | uint8_t *response = e->response; |
---|
| 548 | |
---|
[e0ecc66d] | 549 | /* Data input index */ |
---|
| 550 | int i = 0; |
---|
| 551 | |
---|
[07109c2] | 552 | /* CRC check of data */ |
---|
| 553 | uint16_t crc16; |
---|
| 554 | |
---|
[0596902] | 555 | /* Maximum number of tokens to read. */ |
---|
| 556 | int retries = e->n_ac_max; |
---|
| 557 | |
---|
[e0ecc66d] | 558 | SD_CARD_INVALIDATE_RESPONSE_INDEX( e); |
---|
| 559 | |
---|
[9814d2dd] | 560 | while (true) { |
---|
[f049983] | 561 | RTEMS_DEBUG_PRINT( "Search from %u to %u\n", r, response_size - 1); |
---|
[e0ecc66d] | 562 | |
---|
| 563 | /* Search the data start token in in current response buffer */ |
---|
[0596902] | 564 | retries -= (response_size - r); |
---|
[e0ecc66d] | 565 | while (r < response_size) { |
---|
[0596902] | 566 | RTEMS_DEBUG_PRINT( "Token [%02u]: 0x%02x\n", r, response [r]); |
---|
| 567 | if (response [r] == start_token) { |
---|
[e0ecc66d] | 568 | /* Discard data start token */ |
---|
| 569 | ++r; |
---|
| 570 | goto sd_card_read_start; |
---|
[0596902] | 571 | } else if (SD_CARD_IS_DATA_ERROR( response [r])) { |
---|
| 572 | RTEMS_SYSLOG_ERROR( "Data error token [%02i]: 0x%02" PRIx8 "\n", r, response [r]); |
---|
[e0ecc66d] | 573 | return -RTEMS_IO_ERROR; |
---|
[0596902] | 574 | } else if (response [r] != SD_CARD_IDLE_TOKEN) { |
---|
| 575 | RTEMS_SYSLOG_ERROR( "Unexpected token [%02i]: 0x%02" PRIx8 "\n", r, response [r]); |
---|
[e0ecc66d] | 576 | return -RTEMS_IO_ERROR; |
---|
| 577 | } |
---|
| 578 | ++r; |
---|
| 579 | } |
---|
| 580 | |
---|
[0596902] | 581 | if (retries <= 0) { |
---|
| 582 | RTEMS_SYSLOG_ERROR( "Timeout\n"); |
---|
| 583 | return -RTEMS_IO_ERROR; |
---|
| 584 | } |
---|
[e0ecc66d] | 585 | |
---|
[0596902] | 586 | if (e->schedule_if_busy) |
---|
| 587 | rtems_task_wake_after( RTEMS_YIELD_PROCESSOR); |
---|
| 588 | |
---|
| 589 | /* Query more. We typically have to wait between 10 and 100 |
---|
| 590 | bytes. To reduce overhead, read the response in chunks of |
---|
| 591 | 50 bytes - this doesn't introduce too much copy overhead |
---|
| 592 | but does allow SPI DMA transfers to work efficiently. */ |
---|
| 593 | response = in; |
---|
| 594 | response_size = 50; |
---|
| 595 | if (response_size > n) |
---|
| 596 | response_size = n; |
---|
| 597 | rv = sd_card_query( e, response, response_size); |
---|
| 598 | RTEMS_CHECK_RV( rv, "Query data start token"); |
---|
[e0ecc66d] | 599 | |
---|
| 600 | /* Reset start position */ |
---|
| 601 | r = 0; |
---|
| 602 | } |
---|
| 603 | |
---|
| 604 | sd_card_read_start: |
---|
| 605 | |
---|
| 606 | /* Read data */ |
---|
| 607 | while (r < response_size && i < n) { |
---|
[0596902] | 608 | in [i++] = response [r++]; |
---|
[e0ecc66d] | 609 | } |
---|
| 610 | |
---|
| 611 | /* Read more data? */ |
---|
| 612 | if (i < n) { |
---|
| 613 | rv = sd_card_query( e, &in [i], n - i); |
---|
[f049983] | 614 | RTEMS_CHECK_RV( rv, "Read data"); |
---|
[e0ecc66d] | 615 | i += rv; |
---|
| 616 | } |
---|
| 617 | |
---|
| 618 | /* Read CRC 16 and N_RC */ |
---|
| 619 | rv = sd_card_query( e, e->response, 3); |
---|
[f049983] | 620 | RTEMS_CHECK_RV( rv, "Read CRC 16"); |
---|
[e0ecc66d] | 621 | |
---|
[07109c2] | 622 | crc16 = sd_card_compute_crc16 (in, n); |
---|
| 623 | if ((e->response[0] != ((crc16 >> 8) & 0xff)) || |
---|
| 624 | (e->response[1] != (crc16 & 0xff))) { |
---|
| 625 | RTEMS_SYSLOG_ERROR( "CRC check failed on read\n"); |
---|
| 626 | return -RTEMS_IO_ERROR; |
---|
| 627 | } |
---|
| 628 | |
---|
[e0ecc66d] | 629 | return i; |
---|
| 630 | } |
---|
| 631 | |
---|
| 632 | static int sd_card_write( sd_card_driver_entry *e, uint8_t start_token, uint8_t *out, int n) |
---|
| 633 | { |
---|
| 634 | int rv = 0; |
---|
[07109c2] | 635 | uint8_t crc16_bytes [2] = { 0, 0 }; |
---|
| 636 | uint16_t crc16; |
---|
[e0ecc66d] | 637 | |
---|
| 638 | /* Data output index */ |
---|
| 639 | int o = 0; |
---|
| 640 | |
---|
| 641 | /* Wait until card is not busy */ |
---|
| 642 | rv = sd_card_wait( e); |
---|
[f049983] | 643 | RTEMS_CHECK_RV( rv, "Wait"); |
---|
[e0ecc66d] | 644 | |
---|
| 645 | /* Write data start token */ |
---|
[9814d2dd] | 646 | rv = rtems_libi2c_write_bytes( e->bus, &start_token, 1); |
---|
[f049983] | 647 | RTEMS_CHECK_RV( rv, "Write data start token"); |
---|
[e0ecc66d] | 648 | |
---|
| 649 | /* Write data */ |
---|
[9814d2dd] | 650 | o = rtems_libi2c_write_bytes( e->bus, out, n); |
---|
[f049983] | 651 | RTEMS_CHECK_RV( o, "Write data"); |
---|
[e0ecc66d] | 652 | |
---|
| 653 | /* Write CRC 16 */ |
---|
[07109c2] | 654 | crc16 = sd_card_compute_crc16(out, n); |
---|
| 655 | crc16_bytes[0] = (crc16>>8) & 0xff; |
---|
| 656 | crc16_bytes[1] = (crc16) & 0xff; |
---|
| 657 | rv = rtems_libi2c_write_bytes( e->bus, crc16_bytes, 2); |
---|
[f049983] | 658 | RTEMS_CHECK_RV( rv, "Write CRC 16"); |
---|
[e0ecc66d] | 659 | |
---|
| 660 | /* Read data response */ |
---|
| 661 | rv = sd_card_query( e, e->response, 2); |
---|
[f049983] | 662 | RTEMS_CHECK_RV( rv, "Read data response"); |
---|
[e0ecc66d] | 663 | if (SD_CARD_IS_DATA_REJECTED( e->response [0])) { |
---|
[f049983] | 664 | RTEMS_SYSLOG_ERROR( "Data rejected: 0x%02" PRIx8 "\n", e->response [0]); |
---|
[e0ecc66d] | 665 | return -RTEMS_IO_ERROR; |
---|
| 666 | } |
---|
| 667 | |
---|
| 668 | /* Card is now busy */ |
---|
| 669 | e->busy = true; |
---|
| 670 | |
---|
| 671 | return o; |
---|
| 672 | } |
---|
| 673 | |
---|
| 674 | static inline rtems_status_code sd_card_start( sd_card_driver_entry *e) |
---|
| 675 | { |
---|
| 676 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 677 | int rv = 0; |
---|
| 678 | |
---|
[9814d2dd] | 679 | sc = rtems_libi2c_send_start( e->bus); |
---|
[f049983] | 680 | RTEMS_CHECK_SC( sc, "Send start"); |
---|
[e0ecc66d] | 681 | |
---|
[9814d2dd] | 682 | rv = rtems_libi2c_ioctl( e->bus, RTEMS_LIBI2C_IOCTL_SET_TFRMODE, &e->transfer_mode); |
---|
[f049983] | 683 | RTEMS_CHECK_RV_SC( rv, "Set transfer mode"); |
---|
[e0ecc66d] | 684 | |
---|
[9814d2dd] | 685 | sc = rtems_libi2c_send_addr( e->bus, 1); |
---|
[f049983] | 686 | RTEMS_CHECK_SC( sc, "Send address"); |
---|
[e0ecc66d] | 687 | |
---|
| 688 | return RTEMS_SUCCESSFUL; |
---|
| 689 | } |
---|
| 690 | |
---|
| 691 | static inline rtems_status_code sd_card_stop( sd_card_driver_entry *e) |
---|
| 692 | { |
---|
| 693 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 694 | |
---|
[9814d2dd] | 695 | sc = rtems_libi2c_send_stop( e->bus); |
---|
[f049983] | 696 | RTEMS_CHECK_SC( sc, "Send stop"); |
---|
[e0ecc66d] | 697 | |
---|
| 698 | return RTEMS_SUCCESSFUL; |
---|
| 699 | } |
---|
[9814d2dd] | 700 | |
---|
| 701 | static rtems_status_code sd_card_init( sd_card_driver_entry *e) |
---|
| 702 | { |
---|
| 703 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 704 | int rv = 0; |
---|
| 705 | uint8_t block [SD_CARD_BLOCK_SIZE_DEFAULT]; |
---|
| 706 | uint32_t transfer_speed = 0; |
---|
| 707 | uint32_t read_block_size = 0; |
---|
| 708 | uint32_t write_block_size = 0; |
---|
[ca5bcd8] | 709 | uint8_t csd_structure = 0; |
---|
| 710 | uint64_t capacity = 0; |
---|
[07109c2] | 711 | uint8_t crc7; |
---|
[ca5bcd8] | 712 | |
---|
| 713 | /* Assume first that we have a SD card and not a MMC card */ |
---|
| 714 | bool assume_sd = true; |
---|
| 715 | |
---|
| 716 | /* |
---|
| 717 | * Assume high capacity until proven wrong (applies to SD and not yet |
---|
| 718 | * existing MMC). |
---|
| 719 | */ |
---|
| 720 | bool high_capacity = true; |
---|
| 721 | |
---|
| 722 | bool do_cmd58 = true; |
---|
| 723 | uint32_t cmd_arg = 0; |
---|
| 724 | uint32_t if_cond_test = SD_CARD_FLAG_VHS_2_7_TO_3_3 | SD_CARD_FLAG_CHECK_PATTERN; |
---|
| 725 | uint32_t if_cond_reg = if_cond_test; |
---|
[9814d2dd] | 726 | |
---|
| 727 | /* Start */ |
---|
| 728 | sc = sd_card_start( e); |
---|
| 729 | RTEMS_CLEANUP_SC( sc, sd_card_driver_init_cleanup, "Start"); |
---|
| 730 | |
---|
| 731 | /* Wait until card is not busy */ |
---|
| 732 | rv = sd_card_wait( e); |
---|
| 733 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Wait"); |
---|
| 734 | |
---|
| 735 | /* Send idle tokens for at least 74 clock cycles with active chip select */ |
---|
| 736 | memset( block, SD_CARD_IDLE_TOKEN, SD_CARD_BLOCK_SIZE_DEFAULT); |
---|
| 737 | rv = rtems_libi2c_write_bytes( e->bus, block, SD_CARD_BLOCK_SIZE_DEFAULT); |
---|
| 738 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Active chip select delay"); |
---|
| 739 | |
---|
| 740 | /* Stop */ |
---|
| 741 | sc = sd_card_stop( e); |
---|
| 742 | RTEMS_CHECK_SC( sc, "Stop"); |
---|
| 743 | |
---|
| 744 | /* Start with inactive chip select */ |
---|
| 745 | sc = rtems_libi2c_send_start( e->bus); |
---|
| 746 | RTEMS_CHECK_SC( sc, "Send start"); |
---|
| 747 | |
---|
| 748 | /* Set transfer mode */ |
---|
| 749 | rv = rtems_libi2c_ioctl( e->bus, RTEMS_LIBI2C_IOCTL_SET_TFRMODE, &e->transfer_mode); |
---|
| 750 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Set transfer mode"); |
---|
| 751 | |
---|
| 752 | /* Send idle tokens with inactive chip select */ |
---|
| 753 | rv = sd_card_query( e, e->response, SD_CARD_COMMAND_SIZE); |
---|
| 754 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Inactive chip select delay"); |
---|
| 755 | |
---|
| 756 | /* Activate chip select */ |
---|
| 757 | sc = rtems_libi2c_send_addr( e->bus, 1); |
---|
| 758 | RTEMS_CLEANUP_SC( sc, sd_card_driver_init_cleanup, "Send address"); |
---|
| 759 | |
---|
| 760 | /* Stop multiple block write */ |
---|
| 761 | sd_card_stop_multiple_block_write( e); |
---|
| 762 | |
---|
| 763 | /* Get card status */ |
---|
| 764 | sd_card_send_command( e, SD_CARD_CMD_SEND_STATUS, 0); |
---|
| 765 | |
---|
| 766 | /* Stop multiple block read */ |
---|
| 767 | sd_card_stop_multiple_block_read( e); |
---|
| 768 | |
---|
| 769 | /* Switch to SPI mode */ |
---|
| 770 | rv = sd_card_send_command( e, SD_CARD_CMD_GO_IDLE_STATE, 0); |
---|
| 771 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_CMD_GO_IDLE_STATE"); |
---|
| 772 | |
---|
[ca5bcd8] | 773 | /* |
---|
| 774 | * Get interface condition, CMD8. This is new for SD 2.x and enables |
---|
| 775 | * getting the High Capacity Support flag HCS and checks that the |
---|
| 776 | * voltage is right. Some MMCs accept this command but will still fail |
---|
| 777 | * on ACMD41. SD 1.x cards will fails this command and do not support |
---|
[07109c2] | 778 | * HCS (> 2G capacity). |
---|
[3495c57] | 779 | */ |
---|
[ca5bcd8] | 780 | rv = sd_card_send_register_command( e, SD_CARD_CMD_SEND_IF_COND, if_cond_reg, &if_cond_reg); |
---|
| 781 | |
---|
| 782 | /* |
---|
| 783 | * Regardless of whether CMD8 above passes or fails, send ACMD41. If |
---|
| 784 | * card is MMC it will fail. But older SD < 2.0 (which fail CMD8) will |
---|
| 785 | * always stay "idle" if cmd_arg is non-zero, so set to 0 above on |
---|
| 786 | * fail. |
---|
| 787 | */ |
---|
| 788 | if (rv < 0) { |
---|
[3495c57] | 789 | /* Failed CMD8, so SD 1.x or MMC */ |
---|
[ca5bcd8] | 790 | cmd_arg = 0; |
---|
[3495c57] | 791 | } else { |
---|
[ca5bcd8] | 792 | cmd_arg = SD_CARD_FLAG_HCS; |
---|
| 793 | } |
---|
| 794 | |
---|
[167c6ce] | 795 | /* Enable CRC */ |
---|
| 796 | sd_card_send_command( e, SD_CARD_CMD_CRC_ON_OFF, 1); |
---|
| 797 | |
---|
[9814d2dd] | 798 | /* Initialize card */ |
---|
| 799 | while (true) { |
---|
[ca5bcd8] | 800 | if (assume_sd) { |
---|
| 801 | /* This command (CMD55) supported by SD and (most?) MMCs */ |
---|
| 802 | rv = sd_card_send_command( e, SD_CARD_CMD_APP_CMD, 0); |
---|
| 803 | if (rv < 0) { |
---|
| 804 | RTEMS_SYSLOG( "CMD55 failed. Assume MMC and try CMD1\n"); |
---|
| 805 | assume_sd = false; |
---|
| 806 | continue; |
---|
| 807 | } |
---|
| 808 | |
---|
| 809 | /* |
---|
| 810 | * This command (ACMD41) only supported by SD. Always |
---|
| 811 | * fails if MMC. |
---|
| 812 | */ |
---|
| 813 | rv = sd_card_send_command( e, SD_CARD_ACMD_SD_SEND_OP_COND, cmd_arg); |
---|
| 814 | if (rv < 0) { |
---|
| 815 | /* |
---|
| 816 | * This *will* fail for MMC. If fails, bad/no |
---|
| 817 | * card or card is MMC, do CMD58 then CMD1. |
---|
| 818 | */ |
---|
| 819 | RTEMS_SYSLOG( "ACMD41 failed. Assume MMC and do CMD58 (once) then CMD1\n"); |
---|
| 820 | assume_sd = false; |
---|
| 821 | cmd_arg = SD_CARD_FLAG_HCS; |
---|
| 822 | do_cmd58 = true; |
---|
| 823 | continue; |
---|
| 824 | } else { |
---|
| 825 | /* |
---|
| 826 | * Passed ACMD41 so SD. It is now save to |
---|
| 827 | * check if_cond_reg from CMD8. Reject the |
---|
| 828 | * card in case of a indicated bad voltage. |
---|
| 829 | */ |
---|
| 830 | if (if_cond_reg != if_cond_test) { |
---|
| 831 | RTEMS_CLEANUP_RV_SC( -1, sc, sd_card_driver_init_cleanup, "Bad voltage for SD"); |
---|
| 832 | } |
---|
| 833 | } |
---|
| 834 | } else { |
---|
[3495c57] | 835 | /* |
---|
[ca5bcd8] | 836 | * Does not seem to be SD card. Do init for MMC. |
---|
| 837 | * First send CMD58 once to enable check for HCS |
---|
| 838 | * (similar to CMD8 of SD) with bits 30:29 set to 10b. |
---|
| 839 | * This will work for MMC >= 4.2. Older cards (<= 4.1) |
---|
| 840 | * may may not respond to CMD1 unless CMD58 is sent |
---|
| 841 | * again with zero argument. |
---|
| 842 | */ |
---|
| 843 | if (do_cmd58) { |
---|
| 844 | rv = sd_card_send_command( e, SD_CARD_CMD_READ_OCR, cmd_arg); |
---|
| 845 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Failed CMD58 for MMC"); |
---|
| 846 | |
---|
| 847 | /* A one-shot call */ |
---|
| 848 | do_cmd58 = false; |
---|
| 849 | } |
---|
| 850 | |
---|
| 851 | /* Do CMD1 */ |
---|
| 852 | rv = sd_card_send_command( e, SD_CARD_CMD_SEND_OP_COND, 0); |
---|
| 853 | if (rv < 0) { |
---|
| 854 | if (cmd_arg != 0) { |
---|
| 855 | /* |
---|
| 856 | * Send CMD58 again with zero argument |
---|
| 857 | * value. Proves card is not |
---|
| 858 | * high_capacity. |
---|
| 859 | */ |
---|
| 860 | cmd_arg = 0; |
---|
| 861 | do_cmd58 = true; |
---|
| 862 | high_capacity = false; |
---|
| 863 | continue; |
---|
| 864 | } |
---|
| 865 | |
---|
| 866 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Failed to initialize MMC"); |
---|
| 867 | } |
---|
| 868 | } |
---|
[3495c57] | 869 | |
---|
[ca5bcd8] | 870 | /* |
---|
| 871 | * Not idle? |
---|
| 872 | * |
---|
| 873 | * This hangs forever if the card remains not idle and sends |
---|
| 874 | * always a valid response. |
---|
| 875 | */ |
---|
[9814d2dd] | 876 | if (SD_CARD_IS_NOT_IDLE_RESPONSE( e->response [e->response_index])) { |
---|
| 877 | break; |
---|
| 878 | } |
---|
| 879 | |
---|
| 880 | /* Invoke the scheduler */ |
---|
| 881 | rtems_task_wake_after( RTEMS_YIELD_PROCESSOR); |
---|
[ca5bcd8] | 882 | } |
---|
| 883 | |
---|
| 884 | /* Now we know if we are SD or MMC */ |
---|
| 885 | if (assume_sd) { |
---|
| 886 | if (cmd_arg == 0) { |
---|
| 887 | /* SD is < 2.0 so never high capacity (<= 2G) */ |
---|
| 888 | high_capacity = 0; |
---|
| 889 | } else { |
---|
| 890 | uint32_t reg = 0; |
---|
| 891 | |
---|
| 892 | /* |
---|
| 893 | * SD is definitely 2.x. Now need to send CMD58 to get |
---|
| 894 | * the OCR to see if the HCS bit is set (capacity > 2G) |
---|
| 895 | * or if bit is off (capacity <= 2G, standard |
---|
| 896 | * capacity). |
---|
| 897 | */ |
---|
| 898 | rv = sd_card_send_register_command( e, SD_CARD_CMD_READ_OCR, 0, ®); |
---|
| 899 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Failed CMD58 for SD 2.x"); |
---|
| 900 | |
---|
| 901 | /* Check HCS bit of OCR */ |
---|
| 902 | high_capacity = (reg & SD_CARD_FLAG_HCS) != 0; |
---|
| 903 | } |
---|
| 904 | } else { |
---|
| 905 | /* |
---|
| 906 | * Card is MMC. Unless already proven to be not HCS (< 4.2) |
---|
| 907 | * must do CMD58 again to check the OCR bits 30:29. |
---|
[3495c57] | 908 | */ |
---|
[ca5bcd8] | 909 | if (high_capacity) { |
---|
| 910 | uint32_t reg = 0; |
---|
| 911 | |
---|
| 912 | /* |
---|
| 913 | * The argument should still be correct since was never |
---|
| 914 | * set to 0 |
---|
[3495c57] | 915 | */ |
---|
[ca5bcd8] | 916 | rv = sd_card_send_register_command( e, SD_CARD_CMD_READ_OCR, cmd_arg, ®); |
---|
| 917 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Failed CMD58 for MMC 4.2"); |
---|
| 918 | |
---|
| 919 | /* Check HCS bit of the OCR */ |
---|
| 920 | high_capacity = (reg & 0x600000) == SD_CARD_FLAG_HCS; |
---|
| 921 | } |
---|
| 922 | } |
---|
[9814d2dd] | 923 | |
---|
| 924 | /* Card Identification */ |
---|
| 925 | if (e->verbose) { |
---|
| 926 | rv = sd_card_send_command( e, SD_CARD_CMD_SEND_CID, 0); |
---|
| 927 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_CMD_SEND_CID"); |
---|
| 928 | rv = sd_card_read( e, SD_CARD_START_BLOCK_SINGLE_BLOCK_READ, block, SD_CARD_CID_SIZE); |
---|
| 929 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Read: SD_CARD_CMD_SEND_CID"); |
---|
| 930 | RTEMS_SYSLOG( "*** Card Identification ***\n"); |
---|
| 931 | RTEMS_SYSLOG( "Manufacturer ID : %" PRIu8 "\n", SD_CARD_CID_GET_MID( block)); |
---|
| 932 | RTEMS_SYSLOG( "OEM/Application ID : %" PRIu16 "\n", SD_CARD_CID_GET_OID( block)); |
---|
| 933 | RTEMS_SYSLOG( |
---|
| 934 | "Product name : %c%c%c%c%c%c\n", |
---|
| 935 | SD_CARD_CID_GET_PNM( block, 0), |
---|
| 936 | SD_CARD_CID_GET_PNM( block, 1), |
---|
| 937 | SD_CARD_CID_GET_PNM( block, 2), |
---|
| 938 | SD_CARD_CID_GET_PNM( block, 3), |
---|
| 939 | SD_CARD_CID_GET_PNM( block, 4), |
---|
| 940 | SD_CARD_CID_GET_PNM( block, 5) |
---|
| 941 | ); |
---|
| 942 | RTEMS_SYSLOG( "Product revision : %" PRIu8 "\n", SD_CARD_CID_GET_PRV( block)); |
---|
| 943 | RTEMS_SYSLOG( "Product serial number : %" PRIu32 "\n", SD_CARD_CID_GET_PSN( block)); |
---|
| 944 | RTEMS_SYSLOG( "Manufacturing date : %" PRIu8 "\n", SD_CARD_CID_GET_MDT( block)); |
---|
| 945 | RTEMS_SYSLOG( "7-bit CRC checksum : %" PRIu8 "\n", SD_CARD_CID_GET_CRC7( block)); |
---|
[07109c2] | 946 | crc7 = sd_card_compute_crc7( block, 15); |
---|
| 947 | if (crc7 != SD_CARD_CID_GET_CRC7( block)) |
---|
| 948 | RTEMS_SYSLOG( " Failed! (computed %02" PRIx8 ")\n", crc7); |
---|
[9814d2dd] | 949 | } |
---|
| 950 | |
---|
| 951 | /* Card Specific Data */ |
---|
[ca5bcd8] | 952 | |
---|
| 953 | /* Read CSD */ |
---|
[9814d2dd] | 954 | rv = sd_card_send_command( e, SD_CARD_CMD_SEND_CSD, 0); |
---|
| 955 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_CMD_SEND_CSD"); |
---|
| 956 | rv = sd_card_read( e, SD_CARD_START_BLOCK_SINGLE_BLOCK_READ, block, SD_CARD_CSD_SIZE); |
---|
| 957 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Read: SD_CARD_CMD_SEND_CSD"); |
---|
[ca5bcd8] | 958 | |
---|
[07109c2] | 959 | crc7 = sd_card_compute_crc7( block, 15); |
---|
| 960 | if (crc7 != SD_CARD_CID_GET_CRC7( block)) { |
---|
| 961 | RTEMS_SYSLOG( "SD_CARD_CMD_SEND_CSD CRC failed\n"); |
---|
| 962 | sc = RTEMS_IO_ERROR; |
---|
| 963 | goto sd_card_driver_init_cleanup; |
---|
| 964 | } |
---|
| 965 | |
---|
[ca5bcd8] | 966 | /* CSD Structure */ |
---|
| 967 | csd_structure = SD_CARD_CSD_GET_CSD_STRUCTURE( block); |
---|
| 968 | |
---|
| 969 | /* Transfer speed and access time */ |
---|
[9814d2dd] | 970 | transfer_speed = sd_card_transfer_speed( block); |
---|
| 971 | e->transfer_mode.baudrate = transfer_speed; |
---|
| 972 | e->n_ac_max = sd_card_max_access_time( block, transfer_speed); |
---|
[ca5bcd8] | 973 | |
---|
| 974 | /* Block sizes and capacity */ |
---|
| 975 | if (csd_structure == 0 || !assume_sd) { |
---|
| 976 | /* Treat MMC same as CSD Version 1.0 */ |
---|
| 977 | |
---|
| 978 | read_block_size = 1U << SD_CARD_CSD_GET_READ_BLK_LEN( block); |
---|
| 979 | e->block_size_shift = SD_CARD_CSD_GET_WRITE_BLK_LEN( block); |
---|
| 980 | write_block_size = 1U << e->block_size_shift; |
---|
| 981 | if (read_block_size < write_block_size) { |
---|
| 982 | RTEMS_SYSLOG_ERROR( "Read block size smaller than write block size\n"); |
---|
| 983 | return -RTEMS_IO_ERROR; |
---|
| 984 | } |
---|
| 985 | e->block_size = write_block_size; |
---|
| 986 | e->block_number = sd_card_block_number( block); |
---|
| 987 | capacity = sd_card_capacity( block); |
---|
| 988 | } else if (csd_structure == 1) { |
---|
| 989 | uint32_t c_size = SD_CARD_CSD_1_GET_C_SIZE( block); |
---|
| 990 | |
---|
| 991 | /* Block size is fixed in CSD Version 2.0 */ |
---|
| 992 | e->block_size_shift = 9; |
---|
| 993 | e->block_size = 512; |
---|
| 994 | |
---|
| 995 | e->block_number = (c_size + 1) * 1024; |
---|
| 996 | capacity = (c_size + 1) * 512 * 1024; |
---|
| 997 | read_block_size = 512; |
---|
| 998 | write_block_size = 512; |
---|
[58eccd0] | 999 | |
---|
| 1000 | /* Timeout is fixed at 100ms in CSD Version 2.0 */ |
---|
| 1001 | e->n_ac_max = transfer_speed / 80; |
---|
[ca5bcd8] | 1002 | } else { |
---|
| 1003 | RTEMS_DO_CLEANUP_SC( RTEMS_IO_ERROR, sc, sd_card_driver_init_cleanup, "Unexpected CSD Structure number"); |
---|
[9814d2dd] | 1004 | } |
---|
[ca5bcd8] | 1005 | |
---|
| 1006 | /* Print CSD information */ |
---|
[9814d2dd] | 1007 | if (e->verbose) { |
---|
| 1008 | RTEMS_SYSLOG( "*** Card Specific Data ***\n"); |
---|
| 1009 | RTEMS_SYSLOG( "CSD structure : %" PRIu8 "\n", SD_CARD_CSD_GET_CSD_STRUCTURE( block)); |
---|
| 1010 | RTEMS_SYSLOG( "Spec version : %" PRIu8 "\n", SD_CARD_CSD_GET_SPEC_VERS( block)); |
---|
| 1011 | RTEMS_SYSLOG( "Access time [ns] : %" PRIu32 "\n", sd_card_access_time( block)); |
---|
[58eccd0] | 1012 | RTEMS_SYSLOG( "Access time [N] : %" PRIu32 "\n", SD_CARD_CSD_GET_NSAC( block)*100); |
---|
[9814d2dd] | 1013 | RTEMS_SYSLOG( "Max access time [N] : %" PRIu32 "\n", e->n_ac_max); |
---|
| 1014 | RTEMS_SYSLOG( "Max read block size [B] : %" PRIu32 "\n", read_block_size); |
---|
| 1015 | RTEMS_SYSLOG( "Max write block size [B] : %" PRIu32 "\n", write_block_size); |
---|
| 1016 | RTEMS_SYSLOG( "Block size [B] : %" PRIu32 "\n", e->block_size); |
---|
| 1017 | RTEMS_SYSLOG( "Block number : %" PRIu32 "\n", e->block_number); |
---|
[ca5bcd8] | 1018 | RTEMS_SYSLOG( "Capacity [B] : %" PRIu64 "\n", capacity); |
---|
[9814d2dd] | 1019 | RTEMS_SYSLOG( "Max transfer speed [b/s] : %" PRIu32 "\n", transfer_speed); |
---|
| 1020 | } |
---|
| 1021 | |
---|
[ca5bcd8] | 1022 | if (high_capacity) { |
---|
| 1023 | /* For high capacity cards the address is in blocks */ |
---|
| 1024 | e->block_size_shift = 0; |
---|
| 1025 | } else if (e->block_size_shift == 10) { |
---|
[3495c57] | 1026 | /* |
---|
[ca5bcd8] | 1027 | * Low capacity 2GByte cards with reported block size of 1024 |
---|
| 1028 | * need to be set back to block size of 512 per 'Simplified |
---|
| 1029 | * Physical Layer Specification Version 2.0' section 4.3.2. |
---|
| 1030 | * Otherwise, CMD16 fails if set to 1024. |
---|
| 1031 | */ |
---|
| 1032 | e->block_size_shift = 9; |
---|
| 1033 | e->block_size = 512; |
---|
[58a1f8a] | 1034 | e->block_number *= 2; |
---|
[ca5bcd8] | 1035 | } |
---|
| 1036 | |
---|
[9814d2dd] | 1037 | /* Set read block size */ |
---|
| 1038 | rv = sd_card_send_command( e, SD_CARD_CMD_SET_BLOCKLEN, e->block_size); |
---|
| 1039 | RTEMS_CLEANUP_RV_SC( rv, sc, sd_card_driver_init_cleanup, "Send: SD_CARD_CMD_SET_BLOCKLEN"); |
---|
| 1040 | |
---|
| 1041 | /* Stop */ |
---|
| 1042 | sc = sd_card_stop( e); |
---|
| 1043 | RTEMS_CHECK_SC( sc, "Stop"); |
---|
| 1044 | |
---|
| 1045 | return RTEMS_SUCCESSFUL; |
---|
| 1046 | |
---|
| 1047 | sd_card_driver_init_cleanup: |
---|
| 1048 | |
---|
| 1049 | /* Stop */ |
---|
| 1050 | sd_card_stop( e); |
---|
| 1051 | |
---|
| 1052 | return sc; |
---|
| 1053 | } |
---|
[e0ecc66d] | 1054 | /** @} */ |
---|
| 1055 | |
---|
| 1056 | /** |
---|
| 1057 | * @name Disk Driver Functions |
---|
| 1058 | * @{ |
---|
| 1059 | */ |
---|
| 1060 | |
---|
[3735f08] | 1061 | static int sd_card_disk_block_read( sd_card_driver_entry *e, rtems_blkdev_request *r) |
---|
[e0ecc66d] | 1062 | { |
---|
| 1063 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 1064 | int rv = 0; |
---|
[f031251c] | 1065 | uint32_t start_address = RTEMS_BLKDEV_START_BLOCK (r) << e->block_size_shift; |
---|
[e0ecc66d] | 1066 | uint32_t i = 0; |
---|
| 1067 | |
---|
| 1068 | #ifdef DEBUG |
---|
| 1069 | /* Check request */ |
---|
[9814d2dd] | 1070 | if (r->bufs[0].block >= e->block_number) { |
---|
[f049983] | 1071 | RTEMS_SYSLOG_ERROR( "Start block number out of range"); |
---|
[e0ecc66d] | 1072 | return -RTEMS_INTERNAL_ERROR; |
---|
[f031251c] | 1073 | } else if (r->bufnum > e->block_number - RTEMS_BLKDEV_START_BLOCK (r)) { |
---|
[f049983] | 1074 | RTEMS_SYSLOG_ERROR( "Block count out of range"); |
---|
[e0ecc66d] | 1075 | return -RTEMS_INTERNAL_ERROR; |
---|
| 1076 | } |
---|
| 1077 | #endif /* DEBUG */ |
---|
| 1078 | |
---|
| 1079 | /* Start */ |
---|
| 1080 | sc = sd_card_start( e); |
---|
[f049983] | 1081 | RTEMS_CLEANUP_SC_RV( sc, rv, sd_card_disk_block_read_cleanup, "Start"); |
---|
[e0ecc66d] | 1082 | |
---|
[f031251c] | 1083 | if (r->bufnum == 1) { |
---|
[e0ecc66d] | 1084 | #ifdef DEBUG |
---|
| 1085 | /* Check buffer */ |
---|
| 1086 | if (r->bufs [0].length != e->block_size) { |
---|
[f049983] | 1087 | RTEMS_DO_CLEANUP_RV( -RTEMS_INTERNAL_ERROR, rv, sd_card_disk_block_read_cleanup, "Buffer and disk block size are not equal"); |
---|
[e0ecc66d] | 1088 | } |
---|
[9814d2dd] | 1089 | RTEMS_DEBUG_PRINT( "[01:01]: buffer = 0x%08x, size = %u\n", r->bufs [0].buffer, r->bufs [0].length); |
---|
[e0ecc66d] | 1090 | #endif /* DEBUG */ |
---|
| 1091 | |
---|
| 1092 | /* Single block read */ |
---|
| 1093 | rv = sd_card_send_command( e, SD_CARD_CMD_READ_SINGLE_BLOCK, start_address); |
---|
[f049983] | 1094 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_cleanup, "Send: SD_CARD_CMD_READ_SINGLE_BLOCK"); |
---|
[dccd351] | 1095 | rv = sd_card_read( e, SD_CARD_START_BLOCK_SINGLE_BLOCK_READ, (uint8_t *) r->bufs [0].buffer, (int) e->block_size); |
---|
[f049983] | 1096 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_cleanup, "Read: SD_CARD_CMD_READ_SINGLE_BLOCK"); |
---|
[e0ecc66d] | 1097 | } else { |
---|
| 1098 | /* Start multiple block read */ |
---|
| 1099 | rv = sd_card_send_command( e, SD_CARD_CMD_READ_MULTIPLE_BLOCK, start_address); |
---|
[f049983] | 1100 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_stop_cleanup, "Send: SD_CARD_CMD_READ_MULTIPLE_BLOCK"); |
---|
[e0ecc66d] | 1101 | |
---|
| 1102 | /* Multiple block read */ |
---|
[f031251c] | 1103 | for (i = 0; i < r->bufnum; ++i) { |
---|
[e0ecc66d] | 1104 | #ifdef DEBUG |
---|
| 1105 | /* Check buffer */ |
---|
| 1106 | if (r->bufs [i].length != e->block_size) { |
---|
[f049983] | 1107 | RTEMS_DO_CLEANUP_RV( -RTEMS_INTERNAL_ERROR, rv, sd_card_disk_block_read_stop_cleanup, "Buffer and disk block size are not equal"); |
---|
[e0ecc66d] | 1108 | } |
---|
[9814d2dd] | 1109 | RTEMS_DEBUG_PRINT( "[%02u:%02u]: buffer = 0x%08x, size = %u\n", i + 1, r->bufnum, r->bufs [i].buffer, r->bufs [i].length); |
---|
[e0ecc66d] | 1110 | #endif /* DEBUG */ |
---|
| 1111 | |
---|
[dccd351] | 1112 | rv = sd_card_read( e, SD_CARD_START_BLOCK_MULTIPLE_BLOCK_READ, (uint8_t *) r->bufs [i].buffer, (int) e->block_size); |
---|
[f049983] | 1113 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_stop_cleanup, "Read block"); |
---|
[e0ecc66d] | 1114 | } |
---|
| 1115 | |
---|
| 1116 | /* Stop multiple block read */ |
---|
| 1117 | rv = sd_card_stop_multiple_block_read( e); |
---|
[f049983] | 1118 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_read_cleanup, "Stop multiple block read"); |
---|
[e0ecc66d] | 1119 | } |
---|
| 1120 | |
---|
| 1121 | /* Stop */ |
---|
| 1122 | sc = sd_card_stop( e); |
---|
[f049983] | 1123 | RTEMS_CHECK_SC_RV( sc, "Stop"); |
---|
[e0ecc66d] | 1124 | |
---|
| 1125 | /* Done */ |
---|
[9f0a68c] | 1126 | rtems_blkdev_request_done( r, RTEMS_SUCCESSFUL); |
---|
[e0ecc66d] | 1127 | |
---|
| 1128 | return 0; |
---|
| 1129 | |
---|
| 1130 | sd_card_disk_block_read_stop_cleanup: |
---|
| 1131 | |
---|
| 1132 | /* Stop multiple block read */ |
---|
| 1133 | sd_card_stop_multiple_block_read( e); |
---|
| 1134 | |
---|
| 1135 | sd_card_disk_block_read_cleanup: |
---|
| 1136 | |
---|
| 1137 | /* Stop */ |
---|
| 1138 | sd_card_stop( e); |
---|
| 1139 | |
---|
| 1140 | /* Done */ |
---|
[9f0a68c] | 1141 | rtems_blkdev_request_done( r, RTEMS_IO_ERROR); |
---|
[e0ecc66d] | 1142 | |
---|
[9f0a68c] | 1143 | return 0; |
---|
[e0ecc66d] | 1144 | } |
---|
| 1145 | |
---|
[3735f08] | 1146 | static int sd_card_disk_block_write( sd_card_driver_entry *e, rtems_blkdev_request *r) |
---|
[e0ecc66d] | 1147 | { |
---|
| 1148 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 1149 | int rv = 0; |
---|
[f031251c] | 1150 | uint32_t start_address = RTEMS_BLKDEV_START_BLOCK (r) << e->block_size_shift; |
---|
[e0ecc66d] | 1151 | uint32_t i = 0; |
---|
| 1152 | |
---|
| 1153 | #ifdef DEBUG |
---|
| 1154 | /* Check request */ |
---|
[9814d2dd] | 1155 | if (r->bufs[0].block >= e->block_number) { |
---|
[f049983] | 1156 | RTEMS_SYSLOG_ERROR( "Start block number out of range"); |
---|
[e0ecc66d] | 1157 | return -RTEMS_INTERNAL_ERROR; |
---|
[f031251c] | 1158 | } else if (r->bufnum > e->block_number - RTEMS_BLKDEV_START_BLOCK (r)) { |
---|
[f049983] | 1159 | RTEMS_SYSLOG_ERROR( "Block count out of range"); |
---|
[e0ecc66d] | 1160 | return -RTEMS_INTERNAL_ERROR; |
---|
| 1161 | } |
---|
| 1162 | #endif /* DEBUG */ |
---|
| 1163 | |
---|
| 1164 | /* Start */ |
---|
| 1165 | sc = sd_card_start( e); |
---|
[f049983] | 1166 | RTEMS_CLEANUP_SC_RV( sc, rv, sd_card_disk_block_write_cleanup, "Start"); |
---|
[e0ecc66d] | 1167 | |
---|
[f031251c] | 1168 | if (r->bufnum == 1) { |
---|
[e0ecc66d] | 1169 | #ifdef DEBUG |
---|
| 1170 | /* Check buffer */ |
---|
| 1171 | if (r->bufs [0].length != e->block_size) { |
---|
[f049983] | 1172 | RTEMS_DO_CLEANUP_RV( -RTEMS_INTERNAL_ERROR, rv, sd_card_disk_block_write_cleanup, "Buffer and disk block size are not equal"); |
---|
[e0ecc66d] | 1173 | } |
---|
[9814d2dd] | 1174 | RTEMS_DEBUG_PRINT( "[01:01]: buffer = 0x%08x, size = %u\n", r->bufs [0].buffer, r->bufs [0].length); |
---|
[e0ecc66d] | 1175 | #endif /* DEBUG */ |
---|
| 1176 | |
---|
| 1177 | /* Single block write */ |
---|
| 1178 | rv = sd_card_send_command( e, SD_CARD_CMD_WRITE_BLOCK, start_address); |
---|
[f049983] | 1179 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_cleanup, "Send: SD_CARD_CMD_WRITE_BLOCK"); |
---|
[dccd351] | 1180 | rv = sd_card_write( e, SD_CARD_START_BLOCK_SINGLE_BLOCK_WRITE, (uint8_t *) r->bufs [0].buffer, (int) e->block_size); |
---|
[f049983] | 1181 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_cleanup, "Write: SD_CARD_CMD_WRITE_BLOCK"); |
---|
[e0ecc66d] | 1182 | } else { |
---|
| 1183 | /* Start multiple block write */ |
---|
| 1184 | rv = sd_card_send_command( e, SD_CARD_CMD_WRITE_MULTIPLE_BLOCK, start_address); |
---|
[f049983] | 1185 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_stop_cleanup, "Send: SD_CARD_CMD_WRITE_MULTIPLE_BLOCK"); |
---|
[e0ecc66d] | 1186 | |
---|
| 1187 | /* Multiple block write */ |
---|
[f031251c] | 1188 | for (i = 0; i < r->bufnum; ++i) { |
---|
[e0ecc66d] | 1189 | #ifdef DEBUG |
---|
| 1190 | /* Check buffer */ |
---|
| 1191 | if (r->bufs [i].length != e->block_size) { |
---|
[f049983] | 1192 | RTEMS_DO_CLEANUP_RV( -RTEMS_INTERNAL_ERROR, rv, sd_card_disk_block_write_stop_cleanup, "Buffer and disk block size are not equal"); |
---|
[e0ecc66d] | 1193 | } |
---|
[9814d2dd] | 1194 | RTEMS_DEBUG_PRINT( "[%02u:%02u]: buffer = 0x%08x, size = %u\n", i + 1, r->bufnum, r->bufs [i].buffer, r->bufs [i].length); |
---|
[e0ecc66d] | 1195 | #endif /* DEBUG */ |
---|
| 1196 | |
---|
[dccd351] | 1197 | rv = sd_card_write( e, SD_CARD_START_BLOCK_MULTIPLE_BLOCK_WRITE, (uint8_t *) r->bufs [i].buffer, (int) e->block_size); |
---|
[f049983] | 1198 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_stop_cleanup, "Write block"); |
---|
[e0ecc66d] | 1199 | } |
---|
| 1200 | |
---|
| 1201 | /* Stop multiple block write */ |
---|
| 1202 | rv = sd_card_stop_multiple_block_write( e); |
---|
[f049983] | 1203 | RTEMS_CLEANUP_RV( rv, sd_card_disk_block_write_cleanup, "Stop multiple block write"); |
---|
[e0ecc66d] | 1204 | } |
---|
| 1205 | |
---|
| 1206 | /* Get card status */ |
---|
| 1207 | rv = sd_card_send_command( e, SD_CARD_CMD_SEND_STATUS, 0); |
---|
[f049983] | 1208 | RTEMS_CHECK_RV( rv, "Send: SD_CARD_CMD_SEND_STATUS"); |
---|
[e0ecc66d] | 1209 | |
---|
| 1210 | /* Stop */ |
---|
| 1211 | sc = sd_card_stop( e); |
---|
[f049983] | 1212 | RTEMS_CHECK_SC_RV( sc, "Stop"); |
---|
[e0ecc66d] | 1213 | |
---|
| 1214 | /* Done */ |
---|
[9f0a68c] | 1215 | rtems_blkdev_request_done( r, RTEMS_SUCCESSFUL); |
---|
[e0ecc66d] | 1216 | |
---|
| 1217 | return 0; |
---|
| 1218 | |
---|
| 1219 | sd_card_disk_block_write_stop_cleanup: |
---|
| 1220 | |
---|
| 1221 | /* Stop multiple block write */ |
---|
| 1222 | sd_card_stop_multiple_block_write( e); |
---|
| 1223 | |
---|
| 1224 | sd_card_disk_block_write_cleanup: |
---|
| 1225 | |
---|
| 1226 | /* Get card status */ |
---|
| 1227 | rv = sd_card_send_command( e, SD_CARD_CMD_SEND_STATUS, 0); |
---|
[f049983] | 1228 | RTEMS_CHECK_RV( rv, "Send: SD_CARD_CMD_SEND_STATUS"); |
---|
[e0ecc66d] | 1229 | |
---|
| 1230 | /* Stop */ |
---|
| 1231 | sd_card_stop( e); |
---|
| 1232 | |
---|
| 1233 | /* Done */ |
---|
[9f0a68c] | 1234 | rtems_blkdev_request_done( r, RTEMS_IO_ERROR); |
---|
[e0ecc66d] | 1235 | |
---|
[9f0a68c] | 1236 | return 0; |
---|
[e0ecc66d] | 1237 | } |
---|
| 1238 | |
---|
[94d7bd7] | 1239 | static int sd_card_disk_ioctl( rtems_disk_device *dd, uint32_t req, void *arg) |
---|
[e0ecc66d] | 1240 | { |
---|
[f049983] | 1241 | RTEMS_DEBUG_PRINT( "dev = %u, req = %u, arg = 0x08%x\n", dev, req, arg); |
---|
[4c18d8c] | 1242 | if (req == RTEMS_BLKIO_REQUEST) { |
---|
[1e0a5512] | 1243 | rtems_device_minor_number minor = rtems_disk_get_minor_number( dd); |
---|
[e0ecc66d] | 1244 | sd_card_driver_entry *e = &sd_card_driver_table [minor]; |
---|
[4c18d8c] | 1245 | rtems_blkdev_request *r = (rtems_blkdev_request *) arg; |
---|
[d290bbb] | 1246 | int (*f)( sd_card_driver_entry *, rtems_blkdev_request *); |
---|
| 1247 | uint32_t retries = e->retries; |
---|
| 1248 | int result; |
---|
| 1249 | |
---|
[4c18d8c] | 1250 | switch (r->req) { |
---|
| 1251 | case RTEMS_BLKDEV_REQ_READ: |
---|
[d290bbb] | 1252 | f = sd_card_disk_block_read; |
---|
| 1253 | break; |
---|
[4c18d8c] | 1254 | case RTEMS_BLKDEV_REQ_WRITE: |
---|
[d290bbb] | 1255 | f = sd_card_disk_block_write; |
---|
| 1256 | break; |
---|
[4c18d8c] | 1257 | default: |
---|
[58eccd0] | 1258 | errno = EINVAL; |
---|
[4c18d8c] | 1259 | return -1; |
---|
| 1260 | } |
---|
[d290bbb] | 1261 | do { |
---|
| 1262 | result = f( e, r); |
---|
| 1263 | } while (retries-- > 0 && result != 0); |
---|
| 1264 | return result; |
---|
| 1265 | |
---|
[baf64cdb] | 1266 | } else if (req == RTEMS_BLKIO_CAPABILITIES) { |
---|
[ca5bcd8] | 1267 | *(uint32_t *) arg = RTEMS_BLKDEV_CAP_MULTISECTOR_CONT; |
---|
[4c18d8c] | 1268 | return 0; |
---|
| 1269 | } else { |
---|
[58eccd0] | 1270 | errno = EINVAL; |
---|
[4c18d8c] | 1271 | return -1; |
---|
| 1272 | } |
---|
[e0ecc66d] | 1273 | } |
---|
| 1274 | |
---|
| 1275 | static rtems_status_code sd_card_disk_init( rtems_device_major_number major, rtems_device_minor_number minor, void *arg) |
---|
| 1276 | { |
---|
| 1277 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 1278 | |
---|
[9814d2dd] | 1279 | /* Initialize disk IO */ |
---|
[e0ecc66d] | 1280 | sc = rtems_disk_io_initialize(); |
---|
[9814d2dd] | 1281 | RTEMS_CHECK_SC( sc, "Initialize RTEMS disk IO"); |
---|
[e0ecc66d] | 1282 | |
---|
[9814d2dd] | 1283 | for (minor = 0; minor < sd_card_driver_table_size; ++minor) { |
---|
[ca5bcd8] | 1284 | sd_card_driver_entry *e = &sd_card_driver_table [minor]; |
---|
| 1285 | dev_t dev = rtems_filesystem_make_dev_t( major, minor); |
---|
[d290bbb] | 1286 | uint32_t retries = e->retries; |
---|
[e0ecc66d] | 1287 | |
---|
[9814d2dd] | 1288 | /* Initialize SD Card */ |
---|
[d290bbb] | 1289 | do { |
---|
| 1290 | sc = sd_card_init( e); |
---|
| 1291 | } while (retries-- > 0 && sc != RTEMS_SUCCESSFUL); |
---|
[9814d2dd] | 1292 | RTEMS_CHECK_SC( sc, "Initialize SD Card"); |
---|
[e0ecc66d] | 1293 | |
---|
[9814d2dd] | 1294 | /* Create disk device */ |
---|
[94d7bd7] | 1295 | sc = rtems_disk_create_phys( dev, e->block_size, e->block_number, sd_card_disk_ioctl, NULL, e->device_name); |
---|
[9814d2dd] | 1296 | RTEMS_CHECK_SC( sc, "Create disk device"); |
---|
[e0ecc66d] | 1297 | } |
---|
| 1298 | |
---|
| 1299 | return RTEMS_SUCCESSFUL; |
---|
[9814d2dd] | 1300 | } |
---|
[e0ecc66d] | 1301 | |
---|
[9814d2dd] | 1302 | /** @} */ |
---|
[e0ecc66d] | 1303 | |
---|
[9814d2dd] | 1304 | static const rtems_driver_address_table sd_card_disk_ops = { |
---|
| 1305 | .initialization_entry = sd_card_disk_init, |
---|
| 1306 | .open_entry = rtems_blkdev_generic_open, |
---|
| 1307 | .close_entry = rtems_blkdev_generic_close, |
---|
| 1308 | .read_entry = rtems_blkdev_generic_read, |
---|
| 1309 | .write_entry = rtems_blkdev_generic_write, |
---|
| 1310 | .control_entry = rtems_blkdev_generic_ioctl |
---|
| 1311 | }; |
---|
[e0ecc66d] | 1312 | |
---|
[9814d2dd] | 1313 | rtems_status_code sd_card_register( void) |
---|
[e0ecc66d] | 1314 | { |
---|
| 1315 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[9814d2dd] | 1316 | rtems_device_major_number major = 0; |
---|
[e0ecc66d] | 1317 | |
---|
[9814d2dd] | 1318 | sc = rtems_io_register_driver( 0, &sd_card_disk_ops, &major); |
---|
| 1319 | RTEMS_CHECK_SC( sc, "Register disk SD Card driver"); |
---|
[e0ecc66d] | 1320 | |
---|
| 1321 | return RTEMS_SUCCESSFUL; |
---|
| 1322 | } |
---|