diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/bcm4908/base-files/lib/upgrade/platform.sh | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/target/linux/bcm4908/base-files/lib/upgrade/platform.sh b/target/linux/bcm4908/base-files/lib/upgrade/platform.sh new file mode 100644 index 0000000000..8aca7119e4 --- /dev/null +++ b/target/linux/bcm4908/base-files/lib/upgrade/platform.sh @@ -0,0 +1,213 @@ +# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause + +RAMFS_COPY_BIN="bcm4908img" + +PART_NAME=firmware + +# $(1): file to read from +# $(2): offset in bytes +# $(3): length in bytes +get_content() { + dd if="$1" skip=$2 bs=1 count=$3 2>/dev/null +} + +# $(1): file to read from +# $(2): offset in bytes +get_hex_u32_be() { + dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%02x"' +} + +platform_expected_image() { + local machine=$(board_name) + + case "$machine" in + asus,gt-ac5300) echo "asus GT-AC5300";; + netgear,r8000p) echo "chk U12H359T00_NETGEAR";; + tplink,archer-c2300-v1) echo "";; + esac +} + +platform_identify() { + local magic + local size + + magic=$(get_hex_u32_be "$1" 0) + case "$magic" in + 2a23245e) + echo "chk" + return + ;; + esac + + size=$(wc -c "$1" | cut -d ' ' -f 1) + + magic=$(get_content "$1" $((size - 20 - 64 + 8)) 12) + case "$magic" in + GT-AC5300) + echo "asus" + return + ;; + esac + + echo "unknown" +} + +platform_check_image() { + [ "$#" -gt 1 ] && return 1 + + local expected_image=$(platform_expected_image) + local error=0 + + bcm4908img info -i "$1" > /dev/null || { + echo "Failed to validate BCM4908 image" >&2 + notify_firmware_broken + return 1 + } + + bcm4908img bootfs -i "$1" ls | grep -q "1-openwrt" || { + # OpenWrt images have 1-openwrt dummy file in the bootfs. + # Don't allow backup if it's missing + notify_firmware_no_backup + } + + case "$(platform_identify "$1")" in + asus) + local size=$(wc -c "$1" | cut -d ' ' -f 1) + local productid=$(get_content "$1" $((size - 20 - 64 + 8)) 12) + + [ -n "$expected_image" -a "asus $productid" != "$expected_image" ] && { + echo "Firmware productid mismatch ($productid)" >&2 + error=1 + } + ;; + chk) + local header_len=$((0x$(get_hex_u32_be "$1" 4))) + local board_id_len=$(($header_len - 40)) + local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"') + + [ -n "$expected_image" -a "chk $board_id" != "$expected_image" ] && { + echo "Firmware board_id mismatch ($board_id)" >&2 + error=1 + } + ;; + *) + echo "Invalid image type. Please use firmware specific for this device." >&2 + notify_firmware_broken + error=1 + ;; + esac + + return $error +} + +# $1: cferam index increment value +platform_calc_new_cferam() { + local inc="$1" + local dir="/tmp/sysupgrade-bcm4908" + + local mtd=$(find_mtd_part bootfs) + [ -z "$mtd" ] && { + echo "Failed to find bootfs partition" >&2 + return + } + + rm -fR $dir + mkdir -p $dir + mount -t jffs2 -o ro $mtd $dir || { + echo "Failed to mount bootfs partition $mtd" >&2 + rm -fr $dir + return + } + + local idx=$(ls $dir/cferam.??? | sed -n 's/.*cferam\.\(\d\d\d\)/\1/p') + [ -z "$idx" ] && { + echo "Failed to find cferam current index" >&2 + rm -fr $dir + return + } + + umount $dir + rm -fr $dir + + idx=$(((idx + inc) % 1000)) + + echo $(printf "cferam.%03d" $idx) +} + +platform_do_upgrade_ubi() { + local dir="/tmp/sysupgrade-bcm4908" + local inc=1 + + # Verify new bootfs size + local mtd_bootfs_size=$(grep "\"bootfs\"" /proc/mtd | sed "s/mtd[0-9]*:[ \t]*\([^ \t]*\).*/\1/") + [ -z "$mtd_bootfs_size" ] && { + echo "Unable to find \"bootfs\" partition size" + return + } + mtd_bootfs_size=$((0x$mtd_bootfs_size)) + local img_bootfs_size=$(bcm4908img extract -i "$1" -t bootfs | wc -c) + [ $img_bootfs_size -gt $mtd_bootfs_size ] && { + echo "New bootfs doesn't fit MTD partition." + return + } + + # Find cferam name for new firmware + # For UBI we always flash "firmware" so don't increase cferam index if + # there is "fallback". That could result in cferam.999 & cferam.001 + [ -n "$(find_mtd_index backup)" -o -n "$(find_mtd_index fallback)" ] && inc=0 + local cferam=$(platform_calc_new_cferam $inc) + [ -z "$cferam" ] && exit 1 + + # Prepare new firmware + bcm4908img bootfs -i "$1" mv cferam.000 $cferam || { + echo "Failed to rename cferam.000 to $cferam" >&2 + exit 1 + } + + # Extract rootfs for further flashing + rm -fr $dir + mkdir -p $dir + bcm4908img extract -i "$1" -t rootfs > $dir/root || { + echo "Failed to extract rootfs" >&2 + rm -fr $dir + exit 1 + } + + # Flash bootfs MTD partition with new one + mtd erase bootfs || { + echo "Failed to erase bootfs" >&2 + rm -fr $dir + exit 1 + } + bcm4908img extract -i "$1" -t bootfs | mtd write - bootfs || { + echo "Failed to flash bootfs" >&2 + rm -fr $dir + exit 1 + } + + nand_do_upgrade $dir/root +} + +platform_do_upgrade() { + # Try NAND aware UBI upgrade for OpenWrt images + # Below call will exit on success + bcm4908img bootfs -i "$1" ls | grep -q "1-openwrt" && platform_do_upgrade_ubi "$1" + + echo "Writing whole image to NAND flash. All erase counters will be lost." + + # Find cferam name for new firmware + local cferam=$(platform_calc_new_cferam 1) + [ -z "$cferam" ] && exit 1 + + # Prepare new firmware + bcm4908img bootfs -i "$1" mv cferam.000 $cferam || { + echo "Failed to rename cferam.000 to $cferam" >&2 + exit 1 + } + + # Jush flash firmware partition as is + [ -n "$(find_mtd_index backup)" ] && PART_NAME=backup + [ -n "$(find_mtd_index fallback)" ] && PART_NAME=fallback + mtd erase $PART_NAME + default_do_upgrade "$1" "bcm4908img extract -t firmware" +} |