157 lines
3.4 KiB
Bash
157 lines
3.4 KiB
Bash
PART_NAME=firmware
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# $(1): file to read magic from
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# $(2): offset in bytes
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get_magic_long_at() {
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dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%02x"'
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}
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platform_machine() {
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cat /proc/device-tree/compatible | tr '\0' '\t' | cut -f 1
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}
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platform_flash_type() {
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# On NAND devices "rootfs" is UBI volume, so won't be find in /proc/mtd
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grep -q "\"rootfs\"" /proc/mtd && {
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echo "serial"
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return
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}
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echo "nand"
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}
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platform_expected_image() {
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local machine=$(platform_machine)
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case "$machine" in
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"netgear,r6250v1") echo "chk U12H245T00_NETGEAR"; return;;
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"netgear,r6300v2") echo "chk U12H240T00_NETGEAR"; return;;
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"netgear,r8000") echo "chk U12H315T00_NETGEAR"; return;;
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esac
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}
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platform_identify() {
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local magic
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magic=$(get_magic_long "$1")
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case "$magic" in
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"48445230")
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echo "trx"
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return
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;;
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"2a23245e")
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echo "chk"
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return
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;;
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esac
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magic=$(get_magic_long_at "$1" 14)
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[ "$magic" = "55324e44" ] && {
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echo "cybertan"
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return
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}
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echo "unknown"
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}
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platform_check_image() {
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[ "$#" -gt 1 ] && return 1
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[ "$(platform_flash_type)" = "nand" ] && {
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echo "Firmware upgrade on NAND devices is not implemented."
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return 1
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}
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local file_type=$(platform_identify "$1")
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local magic
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case "$file_type" in
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"chk")
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local header_len=$((0x$(get_magic_long_at "$1" 4)))
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local board_id_len=$(($header_len - 40))
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local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
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local dev_board_id=$(platform_expected_image)
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echo "Found CHK image with device board_id $board_id"
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[ -n "$dev_board_id" -a "chk $board_id" != "$dev_board_id" ] && {
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echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
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return 1
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}
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magic=$(get_magic_long_at "$1" "$header_len")
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[ "$magic" != "48445230" ] && {
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echo "No valid TRX firmware in the CHK image"
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return 1
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}
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return 0
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;;
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"cybertan")
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local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
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local dev_pattern=$(platform_expected_image)
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echo "Found CyberTAN image with device pattern: $pattern"
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[ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
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echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
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return 1
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}
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magic=$(get_magic_long_at "$1" 32)
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[ "$magic" != "48445230" ] && {
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echo "No valid TRX firmware in the CyberTAN image"
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return 1
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}
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return 0
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;;
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"trx")
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return 0
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;;
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*)
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echo "Invalid image type. Please use only .trx files"
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return 1
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;;
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esac
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}
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# Extract TRX and use stadard upgrade method
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platform_do_upgrade_chk() {
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local header_len=$((0x$(get_magic_long_at "$1" 4)))
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local trx="/tmp/$1.trx"
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dd if="$1" of="$trx" bs=$header_len skip=1
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shift
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platform_do_upgrade_trx "$trx" "$@"
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}
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# Extract TRX and use stadard upgrade method
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platform_do_upgrade_cybertan() {
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local trx="/tmp/$1.trx"
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dd if="$1" of="$trx" bs=32 skip=1
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shift
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platform_do_upgrade_trx "$trx" "$@"
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}
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platform_do_upgrade_trx() {
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local flash_type=$(platform_flash_type)
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case "$flash_type" in
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"serial")
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default_do_upgrade "$@"
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;;
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"nand")
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echo "Firmware upgrade on NAND devices is REALLY unsupported."
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;;
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esac
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}
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platform_do_upgrade() {
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local file_type=$(platform_identify "$1")
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case "$file_type" in
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"chk") platform_do_upgrade_chk "$ARGV";;
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"cybertan") platform_do_upgrade_cybertan "$ARGV";;
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*) platform_do_upgrade_trx "$ARGV";;
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esac
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}
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