package/base-files/files/lib/functions/caldata.sh

   1 # Copyright (C) 2019 OpenWrt.org
   2
   3 . /lib/functions.sh
   4 . /lib/functions/system.sh
   5
   6 caldata_die() {
   7         echo "caldata: " "$*"
   8         exit 1
   9 }
  10
  11 caldata_extract() {
  12         local part=$1
  13         local offset=$(($2))
  14         local count=$(($3))
  15         local mtd
  16
  17         mtd=$(find_mtd_chardev $part)
  18         [ -n "$mtd" ] || caldata_die "no mtd device found for partition $part"
  19
  20         dd if=$mtd of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
  21                 caldata_die "failed to extract calibration data from $mtd"
  22 }
  23
  24 caldata_extract_ubi() {
  25         local part=$1
  26         local offset=$(($2))
  27         local count=$(($3))
  28         local ubidev
  29         local ubi
  30
  31         . /lib/upgrade/nand.sh
  32
  33         ubidev=$(nand_find_ubi $CI_UBIPART)
  34         ubi=$(nand_find_volume $ubidev $part)
  35         [ -n "$ubi" ] || caldata_die "no UBI volume found for $part"
  36
  37         dd if=/dev/$ubi of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
  38                 caldata_die "failed to extract calibration data from $ubi"
  39 }
  40
  41 caldata_extract_reverse() {
  42         local part=$1
  43         local offset=$2
  44         local count=$(($3))
  45         local mtd
  46         local reversed
  47         local caldata
  48
  49         mtd=$(find_mtd_chardev "$part")
  50         reversed=$(hexdump -v -s $offset -n $count -e '/1 "%02x "' $mtd)
  51
  52         for byte in $reversed; do
  53                 caldata="\x${byte}${caldata}"
  54         done
  55
  56         printf "%b" "$caldata" > /lib/firmware/$FIRMWARE
  57 }
  58
  59 caldata_from_file() {
  60         local source=$1
  61         local offset=$(($2))
  62         local count=$(($3))
  63
  64         dd if=$source of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
  65                 caldata_die "failed to extract calibration data from $source"
  66 }
  67
  68 caldata_valid() {
  69         local expected="$1"
  70
  71         magic=$(hexdump -v -n 2 -e '1/1 "%02x"' /lib/firmware/$FIRMWARE)
  72         [[ "$magic" == "$expected" ]]
  73         return $?
  74 }
  75