#ifndef _EMMC_SERVER_H_
#define _EMMC_SERVER_H_

#if __arm__
    typedef u32 uint32_t;
#else
    #include <stdint.h>
#endif

/* eMMC server protocol commands */
#define EMMC_CMD_READ           0x01
#define EMMC_CMD_WRITE          0x02
#define EMMC_CMD_STATUS         0x03
#define EMMC_CMD_READ_EXT_CSD   0x04  /* Read 512-byte EXT_CSD register for chip health */
#define EMMC_CMD_ERASE          0x05  /* Erase a range of sectors (forces reallocation) */
#define EMMC_CMD_EXIT           0xFF

/* Transfer chunk sizes basically the amount much data is sent/received per USB transfer was not multiple of 0x1000
 *
 * Reads: 8 sectors (4KB) = 1.1 MB/s - OPTIMIZED
 * Writes: 1 sector (512B) - ORIGINAL (safe)
 */
#define EMMC_CHUNK_SECTORS_READ    8
#define EMMC_CHUNK_SECTORS_WRITE   1
#define EMMC_CHUNK_SECTORS         1   /* Default - single sector for compatibility */
#define EMMC_SECTOR_SIZE           512
#define EMMC_CHUNK_BYTES           (EMMC_CHUNK_SECTORS * EMMC_SECTOR_SIZE)

/* Command structure sent from PC to payload */
struct emmc_cmd_s {
    uint32_t op;
    uint32_t start_sector;
    uint32_t num_sectors;
};

#endif