@@ -1,9 +1,9 @@
.. SPDX-License-Identifier: GPL-2.0+
-U-Boot for LibreTech AC
-=======================
+U-Boot for LibreTech-AC 'LaFrite' (S805X)
+=========================================
-LibreTech AC is a single board computer manufactured by Libre Technology
+LibreTech-AC aka 'LaFrite' is a Single Board Computer manufactured by Libre Computer
with the following specifications:
- Amlogic S805X ARM Cortex-A53 quad-core SoC @ 1.2GHz
@@ -13,12 +13,13 @@ with the following specifications:
- HDMI 2.0 4K/60Hz display
- 40-pin GPIO header
- 4 x USB 2.0 Host
- - eMMC, SPI NOR Flash
+ - SPI NOR Flash
+ - Removable eMMC module
- Infrared receiver
Schematics are available on the manufacturer website.
-U-Boot compilation
+U-Boot Compilation
------------------
.. code-block:: bash
@@ -27,14 +28,20 @@ U-Boot compilation
$ make libretech-ac_defconfig
$ make
-Image creation
---------------
+U-Boot Signing with Pre-Built FIP repo
+--------------------------------------
-For simplified usage, pleaser refer to :doc:`pre-generated-fip` with codename `lafrite`
+.. code-block:: bash
+ $ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
+ $ cd amlogic-boot-fip
+ $ mkdir my-output-dir
+ $ ./build-fip.sh lafrite /path/to/u-boot/u-boot.bin my-output-dir
+
+U-Boot Manual Signing
+---------------------
-Amlogic doesn't provide sources for the firmware and for tools needed
-to create the bootloader image, so it is necessary to obtain them from
-the git tree published by the board vendor:
+Amlogic does not provide sources for the firmware and tools needed to create a bootloader
+image so it is necessary to obtain binaries from sources published by the board vendor:
.. code-block:: bash
@@ -50,7 +57,7 @@ the git tree published by the board vendor:
$ make
$ export UBOOTDIR=$PWD
-Download the latest Amlogic Buildroot package, and extract it :
+Download the latest Amlogic buildroot package and extract it:
.. code-block:: bash
@@ -58,7 +65,7 @@ Download the latest Amlogic Buildroot package, and extract it :
$ tar xfz buildroot_openlinux_kernel_4.9_fbdev_20180418.tar.gz buildroot_openlinux_kernel_4.9_fbdev_20180418/bootloader
$ export BRDIR=$PWD/buildroot_openlinux_kernel_4.9_fbdev_20180418
-Go back to mainline U-Boot source tree then :
+Go back to the mainline U-Boot source tree then:
.. code-block:: bash
@@ -73,40 +80,40 @@ Go back to mainline U-Boot source tree then :
$ cp u-boot.bin fip/bl33.bin
$ sh $UBOOTDIR/blx_fix.sh \
- fip/bl30.bin \
- fip/zero_tmp \
- fip/bl30_zero.bin \
- fip/bl301.bin \
- fip/bl301_zero.bin \
- fip/bl30_new.bin \
- bl30
+ fip/bl30.bin \
+ fip/zero_tmp \
+ fip/bl30_zero.bin \
+ fip/bl301.bin \
+ fip/bl301_zero.bin \
+ fip/bl30_new.bin \
+ bl30
$ $BRDIR/bootloader/uboot-repo/fip/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0
$ sh $UBOOTDIR/blx_fix.sh \
- fip/bl2_acs.bin \
- fip/zero_tmp \
- fip/bl2_zero.bin \
- fip/bl21.bin \
- fip/bl21_zero.bin \
- fip/bl2_new.bin \
- bl2
+ fip/bl2_acs.bin \
+ fip/zero_tmp \
+ fip/bl2_zero.bin \
+ fip/bl21.bin \
+ fip/bl21_zero.bin \
+ fip/bl2_new.bin \
+ bl2
$ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl3enc --input fip/bl30_new.bin
$ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl3enc --input fip/bl31.img
$ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl3enc --input fip/bl33.bin
$ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig
$ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bootmk \
- --output fip/u-boot.bin \
- --bl2 fip/bl2.n.bin.sig \
- --bl30 fip/bl30_new.bin.enc \
- --bl31 fip/bl31.img.enc \
- --bl33 fip/bl33.bin.enc
+ --output fip/u-boot.bin \
+ --bl2 fip/bl2.n.bin.sig \
+ --bl30 fip/bl30_new.bin.enc \
+ --bl31 fip/bl31.img.enc \
+ --bl33 fip/bl33.bin.enc
-and then write the image to SD with:
+Then write U-Boot to USB or SPI-NOR with:
.. code-block:: bash
- $ DEV=/dev/your_sd_device
+ $ DEV=/dev/boot_device
$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
- $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444
+ $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=440
Improve documentation. Signed-off-by: Christian Hewitt <christianshewitt@gmail.com> --- doc/board/amlogic/libretech-ac.rst | 77 ++++++++++++++++-------------- 1 file changed, 42 insertions(+), 35 deletions(-)