cns3xxx: eliminate hardcoded kernel/rootfs partition split

This changes the sysupgrade format. To support upgrades from the old
firmware to the new one, legacy images are provided. Because of the old
partition split, these have to be specific to the NOR or SPI device.

The new sysupgrade images are suitable for begin put on flash directly,
and they are independent of NOR vs SPI flash variant.

Flashing back to old firmware is supported via using the old full-flash
images instead of the old sysupgrade images.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 8 insertions, 99 deletions

diff --git a/target/linux/cns3xxx/base-files/lib/upgrade/platform.sh b/target/linux/cns3xxx/base-files/lib/upgrade/platform.sh
index 6d94a5384d..4efa47dee0 100644
--- a/target/linux/cns3xxx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/cns3xxx/base-files/lib/upgrade/platform.sh
@@ -1,112 +1,21 @@
-. /lib/cns3xxx.sh
-
-RAMFS_COPY_DATA="/lib/cns3xxx.sh"
+PART_NAME=firmware
 
 CI_BLKSZ=65536
 
-platform_find_partitions() {
-	local first dev size erasesize name
-	while read dev size erasesize name; do
-		name=${name#'"'}; name=${name%'"'}
-		case "$name" in
-			vmlinux.bin.l7|kernel|linux|rootfs)
-				if [ -z "$first" ]; then
-					first="$name"
-				else
-					echo "$erasesize:$first:$name"
-					break
-				fi
-			;;
-		esac
-	done < /proc/mtd
-}
-
-platform_find_kernelpart() {
-	local part
-	for part in "${1%:*}" "${1#*:}"; do
-		case "$part" in
-			vmlinux.bin.l7|kernel|linux)
-				echo "$part"
-				break
-			;;
-		esac
-	done
-}
-
-platform_do_upgrade_combined() {
-	local partitions=$(platform_find_partitions)
-	local kernelpart=$(platform_find_kernelpart "${partitions#*:}")
-	local erase_size=$((0x${partitions%%:*})); partitions="${partitions#*:}"
-	local kern_length=0x$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)
-	local kern_blocks=$(($kern_length / $CI_BLKSZ))
-	local root_blocks=$((0x$(dd if="$1" bs=2 skip=5 count=4 2>/dev/null) / $CI_BLKSZ))
-
-	v "platform_do_upgrade_combined"
-	v "partitions=$partitions"
-	v "kernelpart=$kernelpart"
-	v "erase_size=$erase_size" 
-	v "kern_blocks=$kern_blocks"
-	v "root_blocks=$root_blocks"
-
-	if [ -n "$partitions" ] && [ -n "$kernelpart" ] && \
-	   [ ${kern_blocks:-0} -gt 0 ] && \
-	   [ ${root_blocks:-0} -gt 0 ] && \
-	   [ ${erase_size:-0} -gt 0 ];
-	then
-		local append=""
-		[ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
-
-		dd if="$1" bs=$CI_BLKSZ skip=1 count=$kern_blocks 2>/dev/null | mtd write - kernel
-		dd if="$1" bs=$CI_BLKSZ skip=$((1+$kern_blocks)) count=$root_blocks 2>/dev/null | \
-				 mtd -r $append write - rootfs
-	else
-		echo "invalid image"
-	fi
-}
-
 platform_check_image() {
-	local board=$(cns3xxx_board_name)
-	local magic="$(get_magic_word "$1")"
-	local magic_long="$(get_magic_long "$1")"
+	local magic="$(get_magic_long "$1")"
 
 	[ "$#" -gt 1 ] && return 1
 
-	case "$board" in
-	laguna)
-		[ "$magic" != "4349" ] && {
-			echo "Invalid image. Use *-sysupgrade.bin files on this board"
-			return 1
-		}
-
-		local md5_img=$(dd if="$1" bs=2 skip=9 count=16 2>/dev/null)
-		local md5_chk=$(dd if="$1" bs=$CI_BLKSZ skip=1 2>/dev/null | md5sum -); md5_chk="${md5_chk%% *}"
-
-		if [ -n "$md5_img" -a -n "$md5_chk" ] && [ "$md5_img" = "$md5_chk" ]; then
-			return 0
-		else
-			echo "Invalid image. Contents do not match checksum (image:$md5_img calculated:$md5_chk)"
-			return 1
-		fi
-		return 0
-		;;
-	esac
-
-	echo "Sysupgrade is not yet supported on $board."
-	return 1
+	[ "$magic" != "27051956" ] && {
+		echo "Invalid image type."
+		return 1
+	}
+	return 0
 }
 
 platform_do_upgrade() {
-	local board=$(cns3xxx_board_name)
-
-	v "board=$board"
-	case "$board" in
-	laguna)
-		platform_do_upgrade_combined "$ARGV"
-		;;
-	*)
-		default_do_upgrade "$ARGV"
-		;;
-	esac
+	default_do_upgrade "$ARGV"
 }
 
 disable_watchdog() {