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bcm4908: sysupgrade: add pkgtb format support
BCM4908 devices with U-Boot use pkgtb firmware format. It's based on U-Boot's FIT: DTB with configurations, images & embedded data. This format contains bootfs, rootfs and optionally a first stage U-Boot loader. Contained images need to be extracted & flashed. Broadcom used two sets of firmwares: main & backup. It uses UBI volumes "metadata1" & "metadata2" for storing U-Boot env variables with info about flashed images. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This commit is contained in:
Rafał Miłecki
parent
a2cf659ad8
commit
5f05795aa7
@ -1,6 +1,6 @@
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# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
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RAMFS_COPY_BIN="bcm4908img expr"
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RAMFS_COPY_BIN="bcm4908img expr egrep fdtget fw_printenv fw_setenv tr"
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PART_NAME=firmware
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@ -15,6 +15,12 @@ get_content() {
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dd if="$1" skip=$2 bs=1 count=$3 2>/dev/null
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}
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# $(1): file to read from
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# $(2): offset in bytes
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get_hex_u32_le() {
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dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -e '1/4 "%02x"'
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}
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# $(1): file to read from
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# $(2): offset in bytes
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get_hex_u32_be() {
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@ -37,13 +43,23 @@ platform_identify() {
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magic=$(get_hex_u32_be "$1" 0)
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case "$magic" in
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d00dfeed)
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BCM4908_FW_FORMAT="pkgtb"
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return
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;;
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2a23245e)
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local header_len=$((0x$(get_hex_u32_be "$1" 4)))
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local board_id_len=$(($header_len - 40))
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BCM4908_FW_FORMAT="chk"
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BCM4908_FW_BOARD_ID=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
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magic=$(get_hex_u32_be "$1" "$header_len")
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[ "$magic" = "d00dfeed" ] && {
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BCM4908_FW_INT_IMG_FORMAT="pkgtb"
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} || {
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BCM4908_FW_INT_IMG_FORMAT="bcm4908img"
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}
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BCM4908_FW_INT_IMG_EXTRACT_CMD="dd skip=$header_len iflag=skip_bytes"
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return
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;;
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esac
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@ -71,6 +87,117 @@ platform_identify() {
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}
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}
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#
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# pkgtb helpers
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#
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platform_pkgtb_get_image_name() {
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local configuration=$($2 < $1 | fdtget - /configurations default)
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[ -z "$configuration" ] && {
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echo "Failed to read default configuration from pkgtb" >&2
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return
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}
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local image_name=$($2 < $1 | fdtget - /configurations/$configuration $3)
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[ -z "$image_name" ] && {
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echo "Failed to read $3 from pkgtb configuration \"$configuration\"" >&2
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return
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}
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echo "$image_name"
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}
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platform_pkgtb_get_image() {
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local cmd="${2:-cat}"
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local image_name=$(platform_pkgtb_get_image_name "$1" "$cmd" "$3")
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$cmd < $1 | fdtget -p - /images/$image_name | egrep -q "^data$" && {
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$cmd < $1 | fdtget -t r - /images/$image_name data
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return
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}
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$cmd < $1 | fdtget -p - /images/$image_name | egrep -q "^data-position$" && {
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local data_position=$($cmd < $1 | fdtget - /images/$image_name data-position)
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local data_size=$($cmd < $1 | fdtget - /images/$image_name data-size)
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$cmd < $1 2>/dev/null | dd skip=$data_position count=$data_size iflag=skip_bytes,count_bytes
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return
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}
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$cmd < $1 | fdtget -p - /images/$image_name | egrep -q "^data-offset" && {
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local data_offset=$($cmd < $1 | fdtget - /images/$image_name data-offset)
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local totalsize=$(get_hex_u32_be "$1" 4)
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local data_position=$(((0x$totalsize + data_offset + 3) & ~3))
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local data_size=$($cmd < $1 | fdtget - /images/$image_name data-size)
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$cmd < $1 2>/dev/null | dd skip=$data_position count=$data_size iflag=skip_bytes,count_bytes
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return
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}
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}
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platform_pkgtb_setup_env_config() {
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local size=$((0x$(get_hex_u32_le /dev/ubi0_1 4)))
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dd if=/dev/ubi0_1 of=/tmp/env.head count=8 iflag=count_bytes
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dd if=/dev/ubi0_1 of=/tmp/env.body skip=8 iflag=skip_bytes
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printf "%s\t0x%x\t0x%x\t0x%x" "/tmp/env.body" 0x0 $size $size > /tmp/env.config
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}
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platform_pkgtb_get_upgrade_index() {
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platform_pkgtb_setup_env_config
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case "$(fw_printenv -l /tmp -n -c /tmp/env.config COMMITTED)" in
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1) echo 2;;
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2) echo 1;;
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*) echo 1;;
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esac
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}
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platform_pkgtb_commit() {
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local size=$((0x$(get_hex_u32_le /dev/ubi0_1 4)))
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local valid1=0
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local valid2=0
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local seq1
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local seq2
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local tmp
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platform_pkgtb_setup_env_config
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# Read current values
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for valid in $(fw_printenv -l /tmp -n -c /tmp/env.config VALID | tr ',' ' '); do
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case "$valid" in
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1) valid0=1;;
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2) valid1=2;;
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esac
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done
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seq0=$(fw_printenv -l /tmp -n -c /tmp/env.config SEQ | cut -d ',' -f 1)
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seq1=$(fw_printenv -l /tmp -n -c /tmp/env.config SEQ | cut -d ',' -f 2)
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# Calculate values
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case "$1" in
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1) valid0=1; seq0=$(((seq1 + 1) % 1000));;
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2) valid1=2; seq1=$(((seq0 + 1) % 1000));;
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esac
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# Update variables
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fw_setenv -l /tmp -c /tmp/env.config COMMITTED "$1"
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fw_setenv -l /tmp -c /tmp/env.config VALID "$valid0,$valid1"
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fw_setenv -l /tmp -c /tmp/env.config SEQ "$seq0,$seq1"
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# Write
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tmp=$(cat /tmp/env.head /tmp/env.body | wc -c)
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cat /tmp/env.head /tmp/env.body | ubiupdatevol /dev/ubi0_1 -s $tmp -
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}
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#
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# check
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#
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platform_check_pkgtb() {
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local cmd="${2:-cat}"
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[ -n "$(platform_pkgtb_get_image_name "$1" "$cmd" "bootfs")" -a -n "$(platform_pkgtb_get_image_name "$1" "$cmd" "rootfs")" ]
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}
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platform_check_image() {
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[ "$#" -gt 1 ] && return 1
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@ -105,6 +232,13 @@ platform_check_image() {
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notify_firmware_no_backup
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}
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;;
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"pkgtb")
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platform_check_pkgtb "$1" || {
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echo "Failed to validate pkgtb firmware" >&2
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notify_firmware_broken
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return 1
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}
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;;
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*)
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case "$BCM4908_FW_INT_IMG_FORMAT" in
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"bcm4908img")
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@ -120,6 +254,13 @@ platform_check_image() {
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notify_firmware_no_backup
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}
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;;
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"pkgtb")
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platform_check_pkgtb "$1" "$BCM4908_FW_INT_IMG_EXTRACT_CMD" || {
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echo "Failed to validate pkgtb firmware" >&2
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notify_firmware_broken
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return 1
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}
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;;
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esac
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;;
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esac
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@ -127,6 +268,36 @@ platform_check_image() {
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return $error
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}
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#
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# upgrade
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#
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platform_do_upgrade_pkgtb() {
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local cmd="${2:-cat}"
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local size
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local idx bootfs_id rootfs_id
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idx=$(platform_pkgtb_get_upgrade_index)
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case "$idx" in
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1) bootfs_id=3; rootfs_id=4;;
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2) bootfs_id=5; rootfs_id=6;;
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esac
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size=$(platform_pkgtb_get_image "$1" "$cmd" "bootfs" | wc -c)
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ubirmvol /dev/ubi0 -N bootfs$idx
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ubimkvol /dev/ubi0 -n $bootfs_id -N bootfs$idx -t static -s $size
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platform_pkgtb_get_image "$1" "$cmd" "bootfs" | ubiupdatevol /dev/ubi0_$bootfs_id -s $size -
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size=$(platform_pkgtb_get_image "$1" "$cmd" "rootfs" | wc -c)
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ubirmvol /dev/ubi0 -N rootfs$idx
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ubimkvol /dev/ubi0 -n $rootfs_id -N rootfs$idx -t dynamic -s $size
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platform_pkgtb_get_image "$1" "$cmd" "rootfs" | ubiupdatevol /dev/ubi0_$rootfs_id -s $size -
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platform_pkgtb_commit $idx
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nand_do_upgrade_success
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}
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# $1: cferam index increment value
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platform_calc_new_cferam() {
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local inc="$1"
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@ -223,11 +394,17 @@ platform_do_upgrade() {
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"bcm4908img")
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bcm4908img bootfs -i "$1" ls | grep -q "1-openwrt" && platform_do_upgrade_ubi "$1"
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;;
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"pkgtb")
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platform_do_upgrade_pkgtb "$1"
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;;
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*)
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case "$BCM4908_FW_INT_IMG_FORMAT" in
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"bcm4908img")
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bcm4908img bootfs -i "$1" ls | grep -q "1-openwrt" && platform_do_upgrade_ubi "$1"
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;;
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"pkgtb")
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platform_do_upgrade_pkgtb "$1" "$BCM4908_FW_INT_IMG_EXTRACT_CMD"
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;;
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*)
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echo "NAND aware sysupgrade is unsupported for $BCM4908_FW_FORMAT format"
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;;
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@ -237,6 +414,10 @@ platform_do_upgrade() {
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# Above calls exit on success.
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# If we got here it isn't OpenWrt image or something went wrong.
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[ "$BCM4908_FW_FORMAT" = "pkgtb" -o "$BCM4908_FW_INT_IMG_FORMAT" = "pkgtb" ] && {
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echo "Failed to upgrade pkgtb. Fallback to raw flashing is impossible for this format." >&2
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exit 1
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}
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echo "Writing whole image to NAND flash. All erase counters will be lost."
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# Find cferam name for new firmware
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