test -n ${interface} || setenv interface mmc
test -n ${drive} || setenv drive 1

setenv set_blkcnt 'setexpr blkcnt ${filesize} + 0x1ff && setexpr blkcnt ${blkcnt} / 0x200'
setenv set_nextpos 'setexpr filepos ${filepos} + ${filesize}; setexpr blkstart ${blkstart} + ${blkcnt}'

setenv check_1 'setenv conf_blk_offset 0x1fff; mmc read $loadaddr $conf_blk_offset 1'
setenv check_2 'setenv conf_blk_offset 0xfff; mmc read $loadaddr $conf_blk_offset 1'
setenv check_3 'setenv conf_blk_offset 0x7ff; mmc read $loadaddr $conf_blk_offset 1'
setenv check_configblock 'setexpr toradex_oui_addr $loadaddr + 8; mmc dev 0 1; run check_1 || run check_2 || run check_3; crc32 -v $toradex_oui_addr 3 94305232'

setenv migrate_1 'mmc dev 0 0; mmc read ${loadaddr} 6000 1; setenv conf_blk_offset 0x1fff; crc32 -v $toradex_oui_addr 3 94305232 && mmc dev 0 1 && mmc write $loadaddr $conf_blk_offset 1'
setenv migrate_2 'mmc dev 0 0; mmc read ${loadaddr} 8000 1; setenv conf_blk_offset 0xfff; crc32 -v $toradex_oui_addr 3 94305232 && mmc dev 0 1 && mmc write $loadaddr $conf_blk_offset 1'
setenv migrate_3 'mmc dev 0 0; mmc read ${loadaddr} 9000 1; setenv conf_blk_offset 0x7ff; crc32 -v $toradex_oui_addr 3 94305232 && mmc dev 0 1 && mmc write $loadaddr $conf_blk_offset 1'
setenv migrate_4 'mmc dev 0 0; mmc read ${loadaddr} 34000 1; setenv conf_blk_offset 0x1fff; crc32 -v $toradex_oui_addr 3 94305232 && mmc dev 0 1 && mmc write $loadaddr $conf_blk_offset 1'
setenv migrate_5 'mmc dev 0 0; mmc read ${loadaddr} 36000 1; setenv conf_blk_offset 0xfff; crc32 -v $toradex_oui_addr 3 94305232 && mmc dev 0 1 && mmc write $loadaddr $conf_blk_offset 1'
setenv migrate_6 'mmc dev 0 0; mmc read ${loadaddr} 37000 1; setenv conf_blk_offset 0x7ff; crc32 -v $toradex_oui_addr 3 94305232 && mmc dev 0 1 && mmc write $loadaddr $conf_blk_offset 1'
setenv migrate_configblock 'setexpr toradex_oui_addr $loadaddr + 8; run migrate_1; run migrate_2; run migrate_3; run migrate_4; run migrate_5; run migrate_6'

setenv cp_file_chunk 'load ${interface} ${drive}:1 ${loadaddr} root.ext3 ${filesize} ${filepos}; run set_blkcnt; mmc dev 0 0 && mmc write ${loadaddr} ${blkstart} ${blkcnt}'

setenv update_uboot 'load ${interface} ${drive}:1 ${loadaddr} apalis_t30.img && run set_blkcnt && mmc dev 0 1 && mmc write ${loadaddr} 0x0 ${blkcnt}'

setenv update_kernel 'load ${interface} ${drive}:1 ${loadaddr} uImage && fatwrite mmc 0:1 ${loadaddr} uImage ${filesize}'

setenv update_fdt 'load ${interface} ${drive}:1 ${loadaddr} ${fdt_file} && fatwrite mmc 0:1 ${loadaddr} ${fdt_file} ${filesize}'

setenv update_configblock 'run check_configblock; load ${interface} ${drive}:1 ${loadaddr} configblock.bin && run set_blkcnt && mmc dev 0 1 && mmc write ${loadaddr} ${conf_blk_offset} ${blkcnt}'

setenv update_1 'load ${interface} ${drive}:1 ${loadaddr} mbr.bin && mmc dev 0 0 && mmc write ${loadaddr} 0x0 0x1'
setenv update_2 'load ${interface} ${drive}:1 ${loadaddr} boot.vfat && run set_blkcnt && mmc dev 0 0 && mmc write ${loadaddr} 0x2000 ${blkcnt}'
#do it in chunks of 256M to fit into DDR RAM of the smallest module
setenv update_3 'setenv filesize 10000000; setenv filepos 0; setenv blkstart a000; while test ${filesize} -eq "10000000"; do run cp_file_chunk; run set_nextpos; done'

setenv echo_v2.3b2 echo "successfully updated U-Boot, power-cycle and enter \"run setupdate\; run migrate_v2.3b2\" to complete update"
setenv migrate_v2.3b2 'run migrate_configblock; run update_new'
setenv update_v2.3b2 'run update_uboot && run echo_v2.3b2'

setenv update_new 'run check_configblock || run migrate_configblock; run update_uboot; run update_1; run update_2; run update_3; reset'
setenv update 'if test -v $ver; then run update_new; else run update_v2.3b2; fi'

echo 'enter "run update" to update the entire module'