From 167371b600698b1b65b590af6cb1719e2ba57229 Mon Sep 17 00:00:00 2001
From: "Ycarus (Yannick Chabanois)" <ycarus@zugaina.org>
Date: Wed, 23 Feb 2022 21:58:51 +0100
Subject: [PATCH] Add script used for multiples DTS

---
 root/scripts/mkits.sh | 177 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 177 insertions(+)
 create mode 100755 root/scripts/mkits.sh

diff --git a/root/scripts/mkits.sh b/root/scripts/mkits.sh
new file mode 100755
index 00000000..7ee39edb
--- /dev/null
+++ b/root/scripts/mkits.sh
@@ -0,0 +1,177 @@
+#!/bin/sh
+#
+# Licensed under the terms of the GNU GPL License version 2 or later.
+#
+# Author: Peter Tyser <ptyser@xes-inc.com>
+#
+# U-Boot firmware supports the booting of images in the Flattened Image
+# Tree (FIT) format.  The FIT format uses a device tree structure to
+# describe a kernel image, device tree blob, ramdisk, etc.  This script
+# creates an Image Tree Source (.its file) which can be passed to the
+# 'mkimage' utility to generate an Image Tree Blob (.itb file).  The .itb
+# file can then be booted by U-Boot (or other bootloaders which support
+# FIT images).  See doc/uImage.FIT/howto.txt in U-Boot source code for
+# additional information on FIT images.
+#
+
+usage() {
+	printf "Usage: %s -A arch -C comp -a addr -e entry" "$(basename "$0")"
+	printf " -v version -k kernel [-D name -n address -d dtb] -o its_file"
+
+	printf "\n\t-A ==> set architecture to 'arch'"
+	printf "\n\t-C ==> set compression type 'comp'"
+	printf "\n\t-c ==> set config name 'config'"
+	printf "\n\t-a ==> set load address to 'addr' (hex)"
+	printf "\n\t-e ==> set entry point to 'entry' (hex)"
+	printf "\n\t-v ==> set kernel version to 'version'"
+	printf "\n\t-k ==> include kernel image 'kernel'"
+	printf "\n\t-D ==> human friendly Device Tree Blob 'name'"
+	printf "\n\t-n ==> fdt unit-address 'address'"
+	printf "\n\t-d ==> include Device Tree Blob 'dtb'"
+	printf "\n\t-o ==> create output file 'its_file'\n"
+	exit 1
+}
+
+FDTNUM=1
+
+while getopts ":A:a:c:C:D:d:e:k:n:o:v:" OPTION
+do
+	case $OPTION in
+		A ) ARCH=$OPTARG;;
+		a ) LOAD_ADDR=$OPTARG;;
+		c ) CONFIG=$OPTARG;;
+		C ) COMPRESS=$OPTARG;;
+		D ) DEVICE=$OPTARG;;
+		d ) DTB=$OPTARG;;
+		e ) ENTRY_ADDR=$OPTARG;;
+		k ) KERNEL=$OPTARG;;
+		n ) FDTNUM=$OPTARG;;
+		o ) OUTPUT=$OPTARG;;
+		v ) VERSION=$OPTARG;;
+		* ) echo "Invalid option passed to '$0' (options:$*)"
+		usage;;
+	esac
+done
+
+# Make sure user entered all required parameters
+if [ -z "${ARCH}" ] || [ -z "${COMPRESS}" ] || [ -z "${LOAD_ADDR}" ] || \
+	[ -z "${ENTRY_ADDR}" ] || [ -z "${VERSION}" ] || [ -z "${KERNEL}" ] || \
+	[ -z "${OUTPUT}" ] || [ -z "${CONFIG}" ]; then
+	usage
+fi
+
+ARCH_UPPER=$(echo "$ARCH" | tr '[:lower:]' '[:upper:]')
+
+# Conditionally create fdt information
+if [ -n "${DTB}" ]; then
+	if [ -f "$DTB" ]; then
+		FDT_NODE="
+			fdt@$FDTNUM {
+				description = \"${ARCH_UPPER} OpenWrt ${DEVICE} device tree blob\";
+				data = /incbin/(\"${DTB}\");
+				type = \"flat_dt\";
+				arch = \"${ARCH}\";
+				compression = \"none\";
+				hash@1 {
+					algo = \"crc32\";
+				};
+				hash@2 {
+					algo = \"sha1\";
+				};
+			};
+"
+
+		CONFIG_NODE="
+			${CONFIG} {
+			description = \"OpenWrt\";
+			kernel = \"kernel@1\";
+			fdt = \"fdt@$FDTNUM\";
+		};
+"
+	else
+		FDTNUM=0
+		DEFAULT_CONFIG=$FDTNUM
+
+		# for f in $(eval echo $DTB); do <= doesn't work on dash, here comes a workaround:
+		DTB_DIR="${DTB%%{*}"
+		DTB="${DTB##*{}"
+		DTB_CSV="${DTB##*{}"
+		DTB_CSV="${DTB%\}*}"
+		IFS=,
+		for f in $DTB_CSV; do
+			FDTNUM=$((FDTNUM+1))
+
+			ff="${DTB_DIR}/${f}"
+			[ -f "${ff}" ] || {
+				echo "ERROR: no DTBs found" >&2
+				rm -f "${OUTPUT}"
+				exit 1
+			}
+
+			FDT_NODE="${FDT_NODE}
+
+				fdt@$FDTNUM {
+					description = \"${f}\";
+					data = /incbin/(\"${ff}\");
+					type = \"flat_dt\";
+					arch = \"${ARCH}\";
+					compression = \"none\";
+					hash@1 {
+						algo = \"crc32\";
+					};
+					hash@2 {
+						algo = \"sha1\";
+					};
+				};
+"
+			# extract XYZ from image-qcom-ipq4018-rutx-XYZ.dtb
+			f=${f##*-}
+			f=${f%.*}
+
+			CONFIG_NODE="${CONFIG_NODE}
+
+				conf_mdtb@${FDTNUM} {
+				description = \"${f}\";
+				kernel = \"kernel@1\";
+				fdt = \"fdt@$FDTNUM\";
+			};
+"
+		done
+	fi
+fi
+
+# Create a default, fully populated DTS file
+DATA="/dts-v1/;
+
+/ {
+	description = \"${ARCH_UPPER} OpenWrt FIT (Flattened Image Tree)\";
+	#address-cells = <1>;
+
+	images {
+		kernel@1 {
+			description = \"${ARCH_UPPER} OpenWrt Linux-${VERSION}\";
+			data = /incbin/(\"${KERNEL}\");
+			type = \"kernel\";
+			arch = \"${ARCH}\";
+			os = \"linux\";
+			compression = \"${COMPRESS}\";
+			load = <${LOAD_ADDR}>;
+			entry = <${ENTRY_ADDR}>;
+			hash@1 {
+				algo = \"crc32\";
+			};
+			hash@2 {
+				algo = \"sha1\";
+			};
+		};
+${FDT_NODE}
+	};
+
+	configurations {
+		default = \"${DEFAULT_CONFIG}\";
+${CONFIG_NODE}
+	};
+};"
+
+# Write .its file to disk
+echo "$DATA" > "${OUTPUT}"