Usage: ./sunxi-fel [options] command arguments... [command...]
    -h, --help            Print this usage summary and exit
    -v, --verbose            Verbose logging
    -p, --progress            "write" transfers show a progress bar
    -l, --list            Enumerate all (USB) FEL devices and exit
    -d, --dev bus:devnum        Use specific USB bus and device number
        --sid SID            Select device by SID key (exact match)

    spl file            Load and execute U-Boot SPL
        If file additionally contains a main U-Boot binary
        (u-boot-sunxi-with-spl.bin), this command also transfers that
        to memory (default address from image), but won't execute it.

    uboot file-with-spl        like "spl", but actually starts U-Boot
        U-Boot execution will take place when the fel utility exits.
        This allows combining "uboot" with further "write" commands
        (to transfer other files needed for the boot).

    hex[dump] address length    Dumps memory region in hex
    dump address length        Binary memory dump
    exe[cute] address        Call function address
    reset64 address            RMR request for AArch64 warm boot
    memmove dest source size    Copy <size> bytes within device memory
    readl address            Read 32-bit value from device memory
    writel address value        Write 32-bit value to device memory
    read address length file    Write memory contents into file
    write address file        Store file contents into memory
    write-with-progress addr file    "write" with progress bar
    write-with-gauge addr file    Output progress for "dialog --gauge"
    write-with-xgauge addr file    Extended gauge output (updates prompt)
    multi[write] # addr file ...    "write-with-progress" multiple files,
                    sharing a common progress status
    multi[write]-with-gauge ...    like their "write-with-*" counterpart,
    multi[write]-with-xgauge ...      but following the 'multi' syntax:
                      <#> addr file [addr file [...]]
    echo-gauge "some text"        Update prompt/caption for gauge output
    ver[sion]            Show BROM version
    sid                Retrieve and output 128-bit SID key
    clear address length        Clear memory
    fill address length value    Fill memory

    spiflash-info            Retrieves basic information
    spiflash-read addr length file    Write SPI flash contents into file
    spiflash-write addr file    Store file contents into SPI flash