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