test:dfu: Add test scripts for testing DFU regression

This commit adds test scripts for testing if any commit has introduced
regression to the DFU subsystem.

It uses md5 to test if sent and received file is correct.
The test detailed description is available at README file.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
diff --git a/test/dfu/dfu_gadget_test.sh b/test/dfu/dfu_gadget_test.sh
new file mode 100755
index 0000000..4a848c8
--- /dev/null
+++ b/test/dfu/dfu_gadget_test.sh
@@ -0,0 +1,88 @@
+#! /bin/bash
+set -e # any command return if not equal to zero
+clear
+
+COLOUR_RED="\33[31m"
+COLOUR_GREEN="\33[32m"
+COLOUR_DEFAULT="\33[0m"
+
+DIR=./
+SUFFIX=img
+RCV_DIR=rcv/
+LOG_FILE=./log/log-`date +%d-%m-%Y_%H-%M-%S`
+
+./dfu_gadget_test_init.sh
+
+cleanup () {
+    rm -rf $RCV_DIR
+}
+
+die () {
+	printf "   $COLOUR_RED FAILED $COLOUR_DEFAULT \n"
+	cleanup
+	exit 1
+}
+
+calculate_md5sum () {
+    MD5SUM=`md5sum $1`
+    MD5SUM=`echo $MD5SUM | cut -d ' ' -f1`
+    echo "md5sum:"$MD5SUM
+}
+
+dfu_test_file () {
+    printf "$COLOUR_GREEN ========================================================================================= $COLOUR_DEFAULT\n"
+    printf "File:$COLOUR_GREEN %s $COLOUR_DEFAULT\n" $1
+
+    dfu-util -D $1 -a $TARGET_ALT_SETTING >> $LOG_FILE 2>&1 || die $?
+
+    echo -n "TX: "
+    calculate_md5sum $1
+
+    MD5_TX=$MD5SUM
+
+    N_FILE=$DIR$RCV_DIR${1:2}"_rcv"
+
+    dfu-util -U $N_FILE -a $TARGET_ALT_SETTING >> $LOG_FILE 2>&1 || die $?
+
+    echo -n "RX: "
+    calculate_md5sum $N_FILE
+    MD5_RX=$MD5SUM
+
+    if [ "$MD5_TX" == "$MD5_RX" ]; then
+	printf "   $COLOUR_GREEN -------> OK $COLOUR_DEFAULT \n"
+    else
+	printf "   $COLOUR_RED -------> FAILED $COLOUR_DEFAULT \n"
+	cleanup
+	exit 1
+    fi
+
+}
+
+printf "$COLOUR_GREEN========================================================================================= $COLOUR_DEFAULT\n"
+echo "DFU EP0 transmission test program"
+echo "Trouble shoot -> disable DBG (even the KERN_DEBUG) in the UDC driver"
+echo "@ -> TRATS2 # dfu 0 mmc 0"
+mkdir -p $RCV_DIR
+touch $LOG_FILE
+
+if [ $# -eq 0 ]
+then
+	printf "   $COLOUR_RED Please pass alt setting number!!  $COLOUR_DEFAULT \n"
+	exit 0
+fi
+
+TARGET_ALT_SETTING=$1
+
+if [ -n "$2" ]
+then
+	dfu_test_file $2
+else
+	for file in $DIR*.$SUFFIX
+	do
+	    dfu_test_file $file
+	done
+fi
+
+cleanup
+
+exit 0