Merge pull request #2861 from maurerle/backport-migrate-fritz7360-v2

backport-v2022.1.x - xrx200: migrate fritz7360-v2 using incorrect image

patches/openwrt/0008-xrx200-migrate-fritz7360-v2-using-incorrect-image.patch

+From: Grische <github@grische.xyz>
+Date: Sun, 18 Sep 2022 14:03:16 +0200
+Subject: xrx200: migrate fritz7360-v2 using incorrect image
+
+Migrate AVM FRITZ!Box 7360 v2 boards flashed with the incorrect v1 image to use
+the newly added v2 target image during the next upgrade.
+Using the v2 target image allows the boards to read the TFFS partition, which
+is misaligned when using the v1 image.
+
+Ref: https://github.com/freifunk-gluon/gluon/pull/2648
+
+Co-authored-by: Jan-Niklas Burfeind <git@aiyionpri.me>
+
+diff --git a/target/linux/lantiq/xrx200/base-files/lib/preinit/01_sysinfo.sh b/target/linux/lantiq/xrx200/base-files/lib/preinit/01_sysinfo.sh
+new file mode 100644
+index 0000000000000000000000000000000000000000..fab50d708e872f819c643cea79327e4f438de524
+--- /dev/null
++++ b/target/linux/lantiq/xrx200/base-files/lib/preinit/01_sysinfo.sh
+@@ -0,0 +1,62 @@
++set_sysinfo_xrx200_for_fritz7360_model() {
++    local board_name=$1
++    local model
++    local urlader_version urlader_memsize urlader_flashsize
++    local hexdump_format='4/1 "%02x""\n"'
++
++    # Values are based on urlader-parser-py
++    # https://github.com/grische/urlader-parser-py/blob/42970bf8dec7962317df4ff734c57ebf36df8905/parser.py#L77-L84
++    urlader_version="$(dd if=/dev/mtd0ro bs=1 skip=$((0x580+0x0)) count=4 | hexdump -e "${hexdump_format}")"
++    if [ "${urlader_version}" != "00000003" ]; then
++        logger -s -p warn -t sysinfo-xrx200 "unexpected urlader version found: ${urlader_version}"
++        return
++    fi
++
++    urlader_memsize="$(dd if=/dev/mtd0ro bs=1 skip=$((0x580+0x4)) count=4 | hexdump -e "${hexdump_format}")"
++    if [ "${urlader_memsize}" != "08000000" ]; then
++        logger -s -p warn -t sysinfo-xrx200 "unexpected memsize found: ${urlader_memsize}"
++        return
++    fi
++
++    urlader_flashsize="$(dd if=/dev/mtd0ro bs=1 skip=$((0x580+0x8)) count=4 | hexdump -e "${hexdump_format}")"
++    case "${urlader_flashsize}" in
++        "02000000")    # 32MB
++            # see vr9_avm_fritz7360-v2.dts
++            board_name="avm,fritz7360-v2"
++            model="AVM FRITZ!Box 7360 V2"
++            ;;
++        "01000000")    # 16MB
++            return
++            ;;
++        *)
++            logger -s -p warn -t sysinfo-xrx200 "unexpected flashsize found: ${urlader_flashsize}"
++            return
++            ;;
++    esac
++
++    logger -s -p notice -t sysinfo-xrx200 "detected ${board_name} from urlader partition /dev/mtd0ro. Enforcing model ${model}."
++    echo "${board_name}" > /tmp/sysinfo/board_name
++    echo "${model}" > /tmp/sysinfo/model
++}
++
++do_sysinfo_xrx200() {
++    local reported_board board_name model
++
++    [ -d /proc/device-tree ] || return
++    reported_board="$(strings /proc/device-tree/compatible | head -1)"
++
++    mkdir -p /tmp/sysinfo
++    # 7360 is notoriously known for not writing "v2" on their labels and many
++    # routers have flashed the wrong firmware with the wrong flash layout.
++    # We ensure that the underlying hardware is reported correctly, so that
++    # future upgrades will use the correct flash layout.
++    # Using 7360v2 hardware, an upgrade from a 7360v1/sl firmware to a 7360v2
++    # is working.
++    case "${reported_board}" in
++        avm,fritz7360sl)
++            set_sysinfo_xrx200_for_fritz7360_model "${reported_board}"
++            ;;
++    esac
++}
++
++boot_hook_add preinit_main do_sysinfo_xrx200