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-rw-r--r--package/base-files/files/lib/functions/caldata.sh75
1 files changed, 75 insertions, 0 deletions
diff --git a/package/base-files/files/lib/functions/caldata.sh b/package/base-files/files/lib/functions/caldata.sh
new file mode 100644
index 0000000000..f2a306675f
--- /dev/null
+++ b/package/base-files/files/lib/functions/caldata.sh
@@ -0,0 +1,75 @@
+# Copyright (C) 2019 OpenWrt.org
+
+. /lib/functions.sh
+. /lib/functions/system.sh
+
+caldata_die() {
+ echo "caldata: " "$*"
+ exit 1
+}
+
+caldata_extract() {
+ local part=$1
+ local offset=$(($2))
+ local count=$(($3))
+ local mtd
+
+ mtd=$(find_mtd_chardev $part)
+ [ -n "$mtd" ] || caldata_die "no mtd device found for partition $part"
+
+ dd if=$mtd of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
+ caldata_die "failed to extract calibration data from $mtd"
+}
+
+caldata_extract_ubi() {
+ local part=$1
+ local offset=$(($2))
+ local count=$(($3))
+ local ubidev
+ local ubi
+
+ . /lib/upgrade/nand.sh
+
+ ubidev=$(nand_find_ubi $CI_UBIPART)
+ ubi=$(nand_find_volume $ubidev $part)
+ [ -n "$ubi" ] || caldata_die "no UBI volume found for $part"
+
+ dd if=/dev/$ubi of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
+ caldata_die "failed to extract calibration data from $ubi"
+}
+
+caldata_extract_reverse() {
+ local part=$1
+ local offset=$2
+ local count=$(($3))
+ local mtd
+ local reversed
+ local caldata
+
+ mtd=$(find_mtd_chardev "$part")
+ reversed=$(hexdump -v -s $offset -n $count -e '/1 "%02x "' $mtd)
+
+ for byte in $reversed; do
+ caldata="\x${byte}${caldata}"
+ done
+
+ printf "%b" "$caldata" > /lib/firmware/$FIRMWARE
+}
+
+caldata_from_file() {
+ local source=$1
+ local offset=$(($2))
+ local count=$(($3))
+
+ dd if=$source of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
+ caldata_die "failed to extract calibration data from $source"
+}
+
+caldata_valid() {
+ local expected="$1"
+
+ magic=$(hexdump -v -n 2 -e '1/1 "%02x"' /lib/firmware/$FIRMWARE)
+ [[ "$magic" == "$expected" ]]
+ return $?
+}
+