Add some documentation about fastboot 'flash' command and some useful example how to use it to boot an initrd. Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx> --- Documentation/user/usb.rst | 52 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/Documentation/user/usb.rst b/Documentation/user/usb.rst index 9eb1437135a2..24bb8d8b1fb9 100644 --- a/Documentation/user/usb.rst +++ b/Documentation/user/usb.rst @@ -113,6 +113,11 @@ The Fastboot gadget supports the following commands: **NOTE** ``fastboot erase`` is not yet implemented. This means flashing MTD partitions does not yet work. +``fastboot flash`` additionally supports image types UBI and Barebox. For UBI +Images and a MTD device as target, ubiformat is called. For a Barebox image +with an available barebox update handler for the fastboot exported device, the +barebox_update is called. + The barebox Fastboot gadget supports the following non standard extensions: - ``fastboot getvar all`` @@ -126,6 +131,53 @@ The barebox Fastboot gadget supports the following non standard extensions: command returns successfully when the barebox command was successful and it fails when the barebox command fails. +**Example booting kernel/devicetree/initrd with fastboot** + +In Barebox start the fastboot gadget: + +.. code-block:: sh + + usbgadget -A /kernel(kernel)c,/initrd(initrd)c,/devicetree(devicetree)c + +On the host you can use this script to start a kernel with kernel, devicetree +and initrd: + +.. code-block:: sh + + #!/bin/bash + + set -e + set -v + + if [ "$#" -lt 3 ] + then + echo "USAGE: $0 <KERNEL> <DT> <INITRD> [<ARGS>]" + exit 0 + fi + + kernel=$1 + dt=$2 + initrd=$3 + + shift 3 + + fastboot -i 7531 flash kernel $kernel + fastboot -i 7531 flash devicetree $dt + fastboot -i 7531 flash initrd $initrd + + + fastboot -i 7531 oem exec 'global linux.bootargs.fa'$ct'=rdinit=/sbin/init' + if [ $# -gt 0 ] + then + ct=1 + for i in $* + do + fastboot -i 7531 oem exec 'global linux.bootargs.fa'$ct'='"\"$i\"" + ct=$(($ct + 1)) + done + fi + timeout -k 5 3 fastboot -i 7531 oem exec -- bootm -o /devicetree -r /initrd /kernel + USB Composite Multifunction Gadget ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -- 2.7.0 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
