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README

      1 U-Boot for LibreTech CC
      2 =======================
      3 
      4 LibreTech CC is a single board computer manufactured by Libre Technology
      5 with the following specifications:
      6 
      7  - Amlogic S905X ARM Cortex-A53 quad-core SoC @ 2GHz
      8  - ARM Mali 450 GPU
      9  - 2GB DDR3 SDRAM
     10  - Gigabit Ethernet
     11  - HDMI 2.0 4K/60Hz display
     12  - 40-pin GPIO header
     13  - 4 x USB 2.0 Host, 1 x USB OTG
     14  - eMMC, microSD
     15  - Infrared receiver
     16 
     17 Schematics are available on the manufacturer website.
     18 
     19 Currently the U-Boot port supports the following devices:
     20  - serial
     21  - eMMC, microSD
     22  - Ethernet
     23 
     24 U-Boot compilation
     25 ==================
     26 
     27  > export ARCH=arm
     28  > export CROSS_COMPILE=aarch64-none-elf-
     29  > make libretech-cc_defconfig
     30  > make
     31 
     32 Image creation
     33 ==============
     34 
     35 Amlogic doesn't provide sources for the firmware and for tools needed
     36 to create the bootloader image, so it is necessary to obtain them from
     37 the git tree published by the board vendor:
     38 
     39  > wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
     40  > wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
     41  > tar xvfJ gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
     42  > tar xvfJ gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
     43  > export PATH=$PWD/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux/bin:$PWD/gcc-linaro-arm-none-eabi-4.8-2013.11_linux/bin:$PATH
     44  > git clone https://github.com/BayLibre/u-boot.git -b libretech-cc amlogic-u-boot
     45  > cd amlogic-u-boot
     46  > make libretech_cc_defconfig
     47  > make
     48  > export FIPDIR=$PWD/fip
     49 
     50 Go back to mainline U-Boot source tree then :
     51  > mkdir fip
     52 
     53  > cp $FIPDIR/gxl/bl2.bin fip/
     54  > cp $FIPDIR/gxl/acs.bin fip/
     55  > cp $FIPDIR/gxl/bl21.bin fip/
     56  > cp $FIPDIR/gxl/bl30.bin fip/
     57  > cp $FIPDIR/gxl/bl301.bin fip/
     58  > cp $FIPDIR/gxl/bl31.img fip/
     59  > cp u-boot.bin fip/bl33.bin
     60 
     61  > $FIPDIR/blx_fix.sh \
     62 	fip/bl30.bin \
     63 	fip/zero_tmp \
     64 	fip/bl30_zero.bin \
     65 	fip/bl301.bin \
     66 	fip/bl301_zero.bin \
     67 	fip/bl30_new.bin \
     68 	bl30
     69 
     70  > $FIPDIR/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0
     71 
     72  > $FIPDIR/blx_fix.sh \
     73 	fip/bl2_acs.bin \
     74 	fip/zero_tmp \
     75 	fip/bl2_zero.bin \
     76 	fip/bl21.bin \
     77 	fip/bl21_zero.bin \
     78 	fip/bl2_new.bin \
     79 	bl2
     80 
     81  > $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl30_new.bin
     82  > $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl31.img
     83  > $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl33.bin
     84  > $FIPDIR/gxl/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig
     85  > $FIPDIR/gxl/aml_encrypt_gxl --bootmk \
     86 		--output fip/u-boot.bin \
     87 		--bl2 fip/bl2.n.bin.sig \
     88 		--bl30 fip/bl30_new.bin.enc \
     89 		--bl31 fip/bl31.img.enc \
     90 		--bl33 fip/bl33.bin.enc
     91 
     92 and then write the image to SD with:
     93 
     94  > DEV=/dev/your_sd_device
     95  > dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
     96  > dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444
     97