/*
 * Common firmware image format
 */

#ifndef FWIMG_H
#define FWIMG_H

#include <inttypes.h>

/*
 * Firmware chunk header.
 */
#define FW_MAGIC		0x7a07fbd6

struct fw_header {
    uint32_t magic;		/* Magic number */
    uint16_t type;		/* Content type */
    uint16_t flags;		/* Content flags */
    uint32_t len;		/* Content length (excluding header) */
    uint32_t addr;		/* Address or similar */
};

enum fw_data_type {
    FDT_END,			/* End of stream */
    FDT_DATA,			/* FPGA firmware ata to be flashed */
    FDT_TARGET,			/* Subsystem string (must match) */
    FDT_NOTE,			/* Version: XXXXX or similar */
    FDT_ESP_OTA,		/* ESP32 OTA image */
    FDT_FPGA_INIT,		/* FPGA bitstream for update */
    FDT_ESP_PART,		/* ESP32 partition table */
    FDT_ESP_SYS,		/* ESP32 boot loader, OTA control, etc */
    FDT_ESP_TOOL,		/* esptool.py options for serial flashing */
    FDT_BOARDINFO		/* Board information flash address */
};
enum fw_data_flags {
    FDF_OPTIONAL     = 0x0001	/* Ignore if chunk data type unknown */
};

#endif /* FW_H */