defaultenv: Add boot option for DFU

DFU is for device firmware upgrade, but for development purposes it's
sometmes useful to just start a kernel vie DFU. This adds a boot option
for doing this and also the corresponding counterpart on the host. With
this it's possible to boot a system with:

scripts/dfuboot.sh -k linuximage -d dtb -c "root=ubi0:root ubi.mtd=ubi rootfstype=ubifs ignore_loglevel"

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 68 insertions, 0 deletions

diff --git a/scripts/dfuboot.sh b/scripts/dfuboot.sh
new file mode 100755
index 0000000000..524113b613
--- /dev/null
+++ b/scripts/dfuboot.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+
+DEVICETREE=
+KERNEL=
+CMDLINE=
+
+usage() {
+	echo "usage: $0 [OPTIONS]"
+	echo "This script uploads a kernel and optionally a devicetree"
+	echo "and a kernel commandline to barebox via DFU running the"
+	echo "'boot dfu' command."
+	echo "OPTIONS:"
+	echo "  -k <kernel>       kernelimage to upload"
+	echo "  -d <dtb>          devicetree binary blob to upload"
+	echo "  -c \"cmdline\"      kernel commandline"
+	echo "  -h                This help text"
+
+	exit 0
+}
+
+while getopts "k:d:c:h" opt
+do
+	case "$opt" in
+	h)
+		usage
+		;;
+	d)
+		DEVICETREE="$OPTARG"
+		;;
+	k)
+		KERNEL="$OPTARG"
+		;;
+	c)
+		CMDLINE="$OPTARG"
+		;;
+	esac
+done
+
+dfu-util -D "${KERNEL}" -a kernel
+if [ $? != 0 ]; then
+	echo "Failed to upload kernel"
+	exit 1
+fi
+
+if [ -n "$DEVICETREE" ]; then
+	dfu-util -D "${DEVICETREE}" -a dtb
+	if [ $? != 0 ]; then
+		echo "Failed to upload devicetree"
+		exit 1
+	fi
+fi
+
+if [ -n "$CMDLINE" ]; then
+	cmdlinefile=$(mktemp)
+
+	echo -e "$CMDLINE" > "${cmdlinefile}"
+
+	dfu-util -D "${cmdlinefile}" -a cmdline -R
+	result=$?
+
+	rm -f "${cmdlinefile}"
+
+	if [ $result != 0 ]; then
+		echo "Failed to upload cmdline"
+		exit 1
+	fi
+
+fi