78 lines
1.6 KiB
Bash
78 lines
1.6 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=$2 bs=1 count=4 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
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}
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brcm47xx_identify() {
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local magic
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magic=$(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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[ "$#" -gt 1 ] && return 1
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local file_type=$(brcm47xx_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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echo "Found CHK image with device board_id $board_id"
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magic=$(get_magic_long_at "$1" "$header_len")
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[ "$magic" != "48445230" ] && {
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echo "No valid TRX firmware in the CHK image"
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return 1
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}
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echo "Flashing CHK images in unsupported. Please use only .trx files."
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return 1
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;;
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"cybertan")
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magic=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
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echo "Found CyberTAN image with device magic: $magic"
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magic=$(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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echo "Flashing CyberTAN images in unsupported. Please use only .trx files."
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return 1
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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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# use default for platform_do_upgrade()
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