== fbtool introduction ==
fbtool is a tool program running at host pc.
It will send preloader and lk to platform via usb in order to support fastboot command.
1 source code
vendor/mediatek/proprietary/external/datool
2 build
windows:
install visual studio.
chdir windows and run nmake.
output file --> out\fbtool.exe
linux:
osX:
build android.
mmm vendor/mediatek/proprietary/external/datool
output file --> ${ANDROID_HOST_OUT}/bin/fbtool
3 usage
fbtool [-a auth_file] preloader lk
auth_file: device/${COMPANY}/${PROJECT}/fbtool-da/auth_sv5.auth
preloader: device/${COMPANY}/${PROJECT}/fbtool-da/fbtool-da-pl.bin
lk: device/${COMPANY}/${PROJECT}/fbtool-da/fbtool-da-lk.bin
3.1 usage with normal chip
command : fbtool preloader lk
preloader support the following files:
device/${COMPANY}/${PROJECT}/fbtool-da/fbtool-da-pl.bin
${OUT}/obj/PRELOADER_OBJ/bin/preloader_${PROJECT}_NO_GFH.bin
${OUT}/preloader.bin
${OUT}/preloader.img
We recommend to use pre-built binary fbtool-da-pl.bin in case customer disable the download support of preloader.
lk support only device/${COMPANY}/${PROJECT}/fbtool-da/fbtool-da-lk.bin
fbtool-da-lk.bin is generated by ./tool/gen-dalk-from-lk.py
usage: python gen-dalk-from-lk.py ${CHIP_ID} ${OUT}/obj/BOOTLOADER_OBJ/build-${PROJECT}/lk-no-mtk-header.bin fbtool-da-lk.bin
3.2 usage with secure chip (enable DAA)
command : fbtool -a auth_file preloader lk
Generate an auth_file which contains the corresponding public key of private-key.pem (private-key.pem is used to sign preloader)
(just like SP Flash tool).
Sign preloader with ./tool/signfile-for-brom.sh
usage: signfile-for-brom.sh private-key.pem fbtool-da-pl.bin
private-key.pem is generated from openssl command.
run the script and it will output a file : fbtool-da-pl.bin.sign.
(fbtool-da-pl.bin is a pre-built preloader_${PROJECT}_NO_GFH.bin.
DO NOT use preloader.bin or preloader.img to generate the sign file.)
With DAA enabled, the fbtool will automatically use *.sign as the signature of pl & lk.
Thus, we have to
put fbtool-da-pl.bin and fbtool-da-pl.bin.sign in the same folder.
put fbtool-da-lk.bin and fbtool-da-lk.bin.sign in the same folder.