27c9d80f51
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89 lines
2.0 KiB
Bash
89 lines
2.0 KiB
Bash
#
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# Copyright (C) 2019 OpenWrt.org
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#
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. /lib/functions.sh
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iodata_mstc_prepare_fail() {
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echo "failed to check and prepare the environment, rebooting..."
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umount -a
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reboot -f
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}
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# read/write 1byte in mtd device
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#
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# parameters:
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# $1: target mtd device ("/dev/mtdblockN")
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# $2: offset of target value (decimal or hex)
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# $3: value to set (decimal or hex, don't set when reading)
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iodata_mstc_rw_byte() {
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local mtd="$1"
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local offset="$2"
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local setval="$3"
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local _val=$(hexdump -s $offset -n 1 -e '"%d"' $mtd)
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if [ -z "$setval" ]; then
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echo $_val
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return 0
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fi
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# decimal or hex -> decimal
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setval=$((setval))
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[ "$_val" = "$setval" ] && return 0
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setval="$(printf '%02x' $setval)"
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if ! (printf "\x$setval" | dd bs=1 seek=$((offset)) conv=notrunc of=$mtd 2>/dev/null); then
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return 1
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fi
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}
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# set flag in mtd device on I-O DATA devices manufactured by MSTC
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# (MitraStar Technology Corp.)
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#
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# parameters:
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# $1: parameter name
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# $2: mtd name contains target flag
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# $3: offset of flag
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# $4: valid flag values ("n,n,...", ex:"0,1" or "1,2")
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# $5: value to set to the flag
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iodata_mstc_set_flag() {
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local name="$1"
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local mtddev="$(find_mtd_part $2)"
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local offset="$3"
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local valid="$4"
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local setval="$5"
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if [ -z "$offset" ]; then
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echo "no $name flag offset provided"
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iodata_mstc_prepare_fail
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fi
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if [ -z "$mtddev" ]; then
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echo "cannot find \"$2\" mtd partition"
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iodata_mstc_prepare_fail
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fi
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local flag=$(iodata_mstc_rw_byte "$mtddev" "$offset")
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local _tmp
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for i in ${valid//,/ }; do
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if [ "$flag" = "$((i))" ]; then
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_tmp=$flag
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break
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fi
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done
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if [ -z "$_tmp" ]; then
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echo "failed to get valid $name flag, please check the value at $offset in $mtddev"
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iodata_mstc_prepare_fail
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fi
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echo "current: $name => $flag"
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if [ "$flag" != "$((setval))" ]; then
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if ! iodata_mstc_rw_byte "$mtddev" "$offset" "$setval"; then
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echo "failed to set \"$name\" flag"
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iodata_mstc_prepare_fail
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fi
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echo " --> set \"$name\" flag to $setval (valid: $valid)"
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fi
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}
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