ar71xx: create 'fat' images for the DIR-825/TEW-673GRU boards
With these images, it is possible to use the 'unused' partition of the flash. The 'fat' images can be installed with the sysupgrade command. When a 'fat' image is installed from a regular one, the platform specific sysupgrade script copies the calibration data to the end of the flash. Likewise, when a regular image is installed from the 'fat' version the sysupgrade script copies the calibration data back to the original location. SVN-Revision: 33540v19.07.3_mercusys_ac12_duma
Gabor Juhos
12 years ago
parent
e7b1949d87
commit
ffc0ea6c5d
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#!/bin/sh
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#
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# Copyright (C) 2012 OpenWrt.org
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#
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. /lib/functions.sh
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. /lib/ar71xx.sh
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get_mtd_part_size() {
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local part_name=$1
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local first dev size erasesize name
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while read dev size erasesize name; do
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name=${name#'"'}; name=${name%'"'}
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if [ "$name" = "$part_name" ]; then
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echo $((0x$size))
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break
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fi
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done < /proc/mtd
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}
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get_magic_at() {
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local mtddev=$1
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local pos=$2
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dd bs=1 count=2 skip=$pos if=$mtddev 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
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}
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dir825b_is_caldata_valid() {
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local mtddev=$1
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local magic
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magic=$(get_magic_at $mtddev 4096)
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[ "$magic" != "a55a" ] && return 0
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magic=$(get_magic_at $mtddev 20480)
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[ "$magic" != "a55a" ] && return 0
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return 1
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}
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dir825b_copy_caldata() {
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local cal_src=$1
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local cal_dst=$2
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local mtd_src
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local mtd_dst
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local md5_src
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local md5_dst
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mtd_src=$(find_mtd_part $cal_src)
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[ -z "$mtd_src" ] && {
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echo "no $cal_src partition found"
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return 1
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}
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mtd_dst=$(find_mtd_part $cal_dst)
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[ -z "$mtd_dst" ] && {
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echo "no $cal_dst partition found"
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return 1
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}
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dir825b_is_caldata_valid "$mtd_src" && {
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echo "no valid calibration data found in $cal_src"
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return 1
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}
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dir825b_is_caldata_valid "$mtd_dst" && {
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echo "Copying calibration data from $cal_src to $cal_dst..."
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dd if="$mtd_src" 2>/dev/null | mtd -q -q write - "$cal_dst"
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}
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md5_src=$(md5sum "$mtd_src") && md5_src="${md5_src%% *}"
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md5_dst=$(md5sum "$mtd_dst") && md5_dst="${md5_dst%% *}"
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[ "$md5_src" != "$md5_dst" ] && {
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echo "calibration data mismatch $cal_src:$md5_src $cal_dst:$md5_dst"
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return 1
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}
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return 0
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}
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dir825b_do_upgrade_combined() {
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local fw_part=$1
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local fw_file=$2
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local fw_mtd=$(find_mtd_part $fw_part)
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local fw_length=0x$(dd if="$fw_file" bs=2 skip=1 count=4 2>/dev/null)
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local fw_blocks=$(($fw_length / 65536))
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if [ -n "$fw_mtd" ] && [ ${fw_blocks:-0} -gt 0 ]; then
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local append=""
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[ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
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sync
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dd if="$fw_file" bs=64k skip=1 count=$fw_blocks 2>/dev/null | \
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mtd $append write - "$fw_part"
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fi
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}
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dir825b_check_image() {
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local magic="$(get_magic_long "$1")"
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local fw_mtd=$(find_mtd_part "firmware_orig")
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case "$magic" in
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"27051956")
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;;
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"43493030")
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local md5_img=$(dd if="$1" bs=2 skip=9 count=16 2>/dev/null)
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local md5_chk=$(dd if="$1" bs=64k skip=1 2>/dev/null | md5sum -); md5_chk="${md5_chk%% *}"
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local fw_len=$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)
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local fw_part_len=$(get_mtd_part_size "firmware")
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if [ -z "$fw_mtd" ]; then
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ask_bool 0 "Do you have a backup of the caldata partition?" || {
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echo "Warning, please make sure that you have a backup of the caldata partition."
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echo "Once you have that, use 'sysupgrade -i' for upgrading to the 'fat' firmware."
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return 1
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}
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fi
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if [ -z "$md5_img" -o -z "$md5_chk" ]; then
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echo "Unable to get image checksums. Maybe you are using a streamed image?"
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return 1
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fi
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if [ "$md5_img" != "$md5_chk" ]; then
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echo "Invalid image. Contents do not match checksum (image:$md5_img calculated:$md5_chk)"
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return 1
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fi
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fw_len=$((0x$fw_len))
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fw_part_len=${fw_part_len:-0}
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if [ $fw_part_len -lt $fw_len ]; then
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echo "The upgrade image is too big (size:$fw_len available:$fw_part_len)"
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return 1
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fi
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;;
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*)
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echo "Unsupported image format."
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return 1
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;;
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esac
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return 0
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}
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platform_do_upgrade_dir825b() {
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local magic="$(get_magic_long "$1")"
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local fw_mtd=$(find_mtd_part "firmware_orig")
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case "$magic" in
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"27051956")
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if [ -n "$fw_mtd" ]; then
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# restore calibration data before downgrading to
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# the normal image
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dir825b_copy_caldata "caldata" "caldata_orig" || {
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echo "unable to restore calibration data"
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exit 1
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}
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PART_NAME="firmware_orig"
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else
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PART_NAME="firmware"
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fi
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default_do_upgrade "$ARGV"
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;;
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"43493030")
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if [ -z "$fw_mtd" ]; then
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# backup calibration data before upgrading to the
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# fat image
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dir825b_copy_caldata "caldata" "caldata_copy" || {
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echo "unable to backup calibration data"
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exit 1
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}
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fi
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dir825b_do_upgrade_combined "firmware" "$ARGV"
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;;
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esac
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}
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