shofel

Shofel/include/emmc_server.h

@@ -0,0 +1,36 @@
+#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