[openwrt/openwrt] bcm4908: add sysupgrade support
LEDE Commits
lede-commits at lists.infradead.org
Thu Apr 8 12:41:03 BST 2021
rmilecki pushed a commit to openwrt/openwrt.git, branch openwrt-21.02:
https://git.openwrt.org/a5d457a0f4f006f42237fd38e25b20855cfa0740
commit a5d457a0f4f006f42237fd38e25b20855cfa0740
Author: Rafał Miłecki <rafal at milecki.pl>
AuthorDate: Wed Apr 7 14:14:57 2021 +0200
bcm4908: add sysupgrade support
It supports flashing OpenWrt images (bootfs & UBI upgrade) as well as
vendor images (whole MTD partition write).
Upgrading cferom is unsupported. It requires copying device specific
data (like MAC) to target image before flashing.
Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
(cherry picked from commit a6a0b252baa6c19dfc62611ea910b56527ce4fa5)
---
.../bcm4908/base-files/lib/upgrade/platform.sh | 213 +++++++++++++++++++++
1 file changed, 213 insertions(+)
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"
+}
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