mk_spl_image

#!/bin/bash

SCRIPTDIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
source $SCRIPTDIR/chip_nand_scripts_common

require sunxi-nand-image-builder "Please install from http://github.com/linux-sunxi/sunxi-tools."

# build the SPL image
prepare_spl() {
  local tmpdir=`mktemp -d -t chip-spl-XXXXXX`
  local nandrepeatedspl=$1
  local spl=$2
  local eraseblocksize=$3
  local pagesize=$4
  local oobsize=$5
  local repeat=$((eraseblocksize/pagesize/64))
  local nandspl=$tmpdir/nand-spl.bin
  local nandpaddedspl=$tmpdir/nand-padded-spl.bin
  local padding=$tmpdir/padding
  local splpadding=$tmpdir/nand-spl-padding

  echo sunxi-nand-image-builder -c 64/1024 -p $pagesize -o $oobsize -u 1024 -e $eraseblocksize -b -s $spl $nandspl
  sunxi-nand-image-builder -c 64/1024 -p $pagesize -o $oobsize -u 1024 -e $eraseblocksize -b -s $spl $nandspl

  local splsize=`filesize $nandspl`
  local paddingsize=$((64-(splsize/(pagesize+oobsize))))
  local i=0

  while [ $i -lt $repeat ]; do
    dd if=/dev/urandom of=$padding bs=1024 count=$paddingsize
    echo sunxi-nand-image-builder -c 64/1024 -p $pagesize -o $oobsize -u 1024 -e $eraseblocksize -b -s $padding $splpadding
    sunxi-nand-image-builder -c 64/1024 -p $pagesize -o $oobsize -u 1024 -e $eraseblocksize -b -s $padding $splpadding
    cat $nandspl $splpadding > $nandpaddedspl

    if [ "$i" -eq "0" ]; then
      cat $nandpaddedspl > $nandrepeatedspl
    else
      cat $nandpaddedspl >> $nandrepeatedspl
    fi

    i=$((i+1))
  done

  rm -rf $tmpdir
}

usage() {
  echo -e "\n\
  usage: $(basename $0) [options] INPUTFILE\n\
\n
  options:\n\
    -N FILENAME		- read nand configuration from FILENAME\n\
    -d OUTPUTDIR    - write to output directory (default: current directory)\n\
    -o OUTPUTFILE   - write to output file (if no absolute path is given, it will go to OUTPUTDIR)\n\
    -h, --help          - show this help\n\
\n"
  exit 1
}


while getopts ":N:d:o:" o; do
    case "${o}" in
        N)
            nand_config="${OPTARG}"
            ;;
        o)
            outputfile="${OPTARG}"
            ;;
        d)
            outputdir="${OPTARG}"
            ;;
        *)
            usage
            ;;
    esac
done
shift $((OPTIND-1))

[[ -z "${nand_config}" ]] && echo "ERROR: no nand configuration specified" && usage && exit
read_nand_config "${nand_config}"

outputdir=${outputdir:-$PWD}
outputfile=${outputfile:-$outputdir/spl-$NAND_EBSIZE-$NAND_PSIZE-$NAND_OSIZE.bin}
input_file=$1

[[ -z "${input_file}" ]] && echo "ERROR: no input file specified" && usage && exit
 
 
echo prepare_spl $outputfile $input_file $NAND_ERASE_BLOCK_SIZE $NAND_PAGE_SIZE $NAND_OOB_SIZE
prepare_spl $outputfile $input_file $NAND_ERASE_BLOCK_SIZE $NAND_PAGE_SIZE $NAND_OOB_SIZE