37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
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#ifndef _EMMC_SERVER_H_
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#define _EMMC_SERVER_H_
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#if __arm__
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typedef u32 uint32_t;
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#else
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#include <stdint.h>
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#endif
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/* eMMC server protocol commands */
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#define EMMC_CMD_READ 0x01
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#define EMMC_CMD_WRITE 0x02
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#define EMMC_CMD_STATUS 0x03
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#define EMMC_CMD_READ_EXT_CSD 0x04 /* Read 512-byte EXT_CSD register for chip health */
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#define EMMC_CMD_ERASE 0x05 /* Erase a range of sectors (forces reallocation) */
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#define EMMC_CMD_EXIT 0xFF
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/* Transfer chunk sizes basically the amount much data is sent/received per USB transfer was not multiple of 0x1000
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*
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* Reads: 8 sectors (4KB) = 1.1 MB/s - OPTIMIZED
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* Writes: 1 sector (512B) - ORIGINAL (safe)
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*/
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#define EMMC_CHUNK_SECTORS_READ 8
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#define EMMC_CHUNK_SECTORS_WRITE 1
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#define EMMC_CHUNK_SECTORS 1 /* Default - single sector for compatibility */
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#define EMMC_SECTOR_SIZE 512
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#define EMMC_CHUNK_BYTES (EMMC_CHUNK_SECTORS * EMMC_SECTOR_SIZE)
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/* Command structure sent from PC to payload */
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struct emmc_cmd_s {
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uint32_t op;
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uint32_t start_sector;
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uint32_t num_sectors;
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};
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#endif
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