1 files changed, 118 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh b/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh
new file mode 100644
index 0000000..de8d883
--- /dev/null
+++ b/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh
@@ -0,0 +1,118 @@
+PART_NAME=firmware
+
+# $(1): file to read magic from
+# $(2): offset in bytes
+get_magic_long_at() {
+	dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%02x"'
+}
+
+platform_flash_type() {
+	# On NAND devices "rootfs" is UBI volume, so won't be find in /proc/mtd
+	grep -q "\"rootfs\"" /proc/mtd && {
+		echo "serial"
+		return
+	}
+
+	echo "nand"
+}
+
+platform_identify() {
+	local magic
+
+	magic=$(get_magic_long "$1")
+	case "$magic" in
+		"48445230")
+			echo "trx"
+			return
+			;;
+		"2a23245e")
+			echo "chk"
+			return
+			;;
+	esac
+
+	magic=$(get_magic_long_at "$1" 14)
+	[ "$magic" = "55324e44" ] && {
+		echo "cybertan"
+		return
+	}
+
+	echo "unknown"
+}
+
+platform_check_image() {
+	[ "$#" -gt 1 ] && return 1
+
+	[ "$(platform_flash_type)" = "nand" ] && {
+		echo "Firmware upgrade on NAND devices is not implemented."
+		return 1
+	}
+
+	local file_type=$(platform_identify "$1")
+
+	case "$file_type" in
+		"chk")
+			local header_len=$((0x$(get_magic_long_at "$1" 4)))
+			local board_id_len=$(($header_len - 40))
+			local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
+			echo "Found CHK image with device board_id $board_id"
+			echo "Flashing CHK images in unsupported. Please use only .trx files."
+			return 1
+		;;
+		"cybertan")
+			local magic=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
+			echo "Found CyberTAN image with device magic: $magic"
+			echo "Flashing CyberTAN images in unsupported. Please use only .trx files."
+			return 1
+		;;
+		"trx")
+			return 0
+		;;
+		*)
+			echo "Invalid image type. Please use only .trx files"
+			return 1
+		;;
+	esac
+}
+
+# Extract TRX and use stadard upgrade method
+platform_do_upgrade_chk() {
+	local header_len=$((0x$(get_magic_long_at "$1" 4)))
+	local trx="/tmp/$1.trx"
+
+	dd if="$1" of="$trx" bs=$header_len skip=1
+	shift
+	platform_do_upgrade_trx "$trx" "$@"
+}
+
+# Extract TRX and use stadard upgrade method
+platform_do_upgrade_cybertan() {
+	local trx="/tmp/$1.trx"
+
+	dd if="$1" of="$trx" bs=32 skip=1
+	shift
+	platform_do_upgrade_trx "$trx" "$@"
+}
+
+platform_do_upgrade_trx() {
+	local flash_type=$(platform_flash_type)
+
+	case "$flash_type" in
+		"serial")
+			default_do_upgrade "$@"
+		;;
+		"nand")
+			echo "Firmware upgrade on NAND devices is REALLY unsupported."
+		;;
+	esac
+}
+
+platform_do_upgrade() {
+	local file_type=$(platform_identify "$1")
+
+	case "$file_type" in
+		"chk")		platform_do_upgrade_chk "$ARGV";;
+		"cybertan")	platform_do_upgrade_cybertan "$ARGV";;
+		*)		platform_do_upgrade_trx "$ARGV";;
+	esac
+}