add firmware binary 1.17.0.120 with the extract tool

firmware/.gitignore

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+initramfs

firmware/idl4k.bin

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+idl4k.bin-1.17.0.120

tools/cpio-idl4k-bin.sh

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+#!/bin/bash
+#
+# Author: Portisch
+# https://github.com/Portisch/idl4k
+#
+
+UIMAGE=idl4k.bin
+CPIONEW=rootfs-idl4k.cpio
+INITRAMFSDIR=initramfs
+KERNELDIR=../build/kernel/
+
+case $1 in
+extract)
+
+	#////////////////////////////////////////////////////////////
+	# Checking for uImage magic word
+	# http://linux-arm.org/git?p=u-boot-armdev.git;a=blob;f=include/image.h
+	#////////////////////////////////////////////////////////////
+	#
+	echo ">>>>> Checking for uImage magic word ( 27051956 ) :"
+	MAGICWORD=`dd if=${UIMAGE} ibs=1 count=4 | hexdump -v -e '4/1 "%02X"'`
+	if [ '27051956' != "$MAGICWORD" ]
+		then
+			echo "Not a uImage: $MAGICWORD != 27051956"
+			exit 1
+	else
+			echo "$UIMAGE acknowledged!"
+	fi
+
+	#////////////////////////////////////////////////////////////
+	# Remove header from uImage
+	#////////////////////////////////////////////////////////////
+	#
+	echo ">>>>> Remove header from $UIMAGE"
+	IMAGEOLDGZ='Image.old.gz'
+	dd if=${UIMAGE} bs=1 skip=64 of=${IMAGEOLDGZ}
+
+	#////////////////////////////////////////////////////////////
+	# Extracting kernel from uImage
+	#////////////////////////////////////////////////////////////
+	#
+	echo ">>>>> Extracting kernel from $UIMAGE"
+	gunzip ${IMAGEOLDGZ}
+
+	#////////////////////////////////////////////////////////////
+	#Extracting initramfs
+	# www.garykessler.net/library/file_sigs.html
+	# The end of the cpio archive is recognized with an empty file named 'TRAILER!!!' = '54 52 41 49 4C 45 52 21 21 21' (hexadecimal)
+	#////////////////////////////////////////////////////////////
+	#
+	echo ">>>>> Extracting initramfs from kernel"
+	CPIOSTART=`grep -a -b -m 1 -o '0707010' Image.old | head -1 | cut -f 1 -d :`
+	CPIOEND=`grep -a -b -m 1 -o -P '\x54\x52\x41\x49\x4C\x45\x52\x21\x21\x21\x00\x00\x00\x00' Image.old | head -1 | cut -f 1 -d :`
+	CPIOEND=$((CPIOEND + 11 + 3))
+	CPIOSIZE=$((CPIOEND - CPIOSTART))
+	echo "START: ${CPIOSTART} END: ${CPIOEND} SIZE: ${CPIOSIZE}"
+	OLDINITRAMFSDIR='initramfs'
+	if [ "$CPIOSIZE" -le '0' ]
+		then
+			echo "initramfs.cpio not found"
+			exit
+	fi
+	dd if=Image.old bs=1 skip=$CPIOSTART count=$CPIOSIZE > initramfs.old.cpio
+	rm -rf $OLDINITRAMFSDIR
+	mkdir -p $OLDINITRAMFSDIR
+	cd $OLDINITRAMFSDIR
+	cpio -v -i --no-absolute-filenames < ../initramfs.old.cpio
+	cd ..
+	rm -rf Image.old
+	rm -rf initramfs.old.cpio
+	echo ">>>>> CPIO arcive got extracted from binary"
+
+	;;
+repack)
+	#////////////////////////////////////////////////////////////
+	# Create new cpio archive
+	#////////////////////////////////////////////////////////////
+	#
+	cd ${INITRAMFSDIR}
+	echo ">>>>> Create new cpio archive: $CPIONEW"
+	find . "(" -path './.git' -o -name '.gitkeep' -o -name 'README.md' ")" -prune -o -print | cpio -C 1 -R root:root -H newc -o > ${KERNELDIR}${CPIONEW}
+	
+	;;
+	*)
+	echo "unknown command"
+
+esac