mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-22 03:03:05 +00:00
623a8c812e
LG X3 is a development board based on Nvidia Tegra 3 SoC on base of which Optimus 4X HD and Optimus Vu were created. Both smartphones feature a 4.7" and 5" panels respectively, an Nvidia Tegra 3 quad-core chip, 1 GB of RAM and 16/32 GB of internal storage. Optimux 4X HD additionally has a micro SD slot. Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # LG P880 T30 Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # LG P895 T30 Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
93 lines
2.9 KiB
ReStructuredText
93 lines
2.9 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
|
||
|
||
U-Boot for the LG X3 T30 device family
|
||
======================================
|
||
|
||
``DISCLAMER!`` Moving your LG P880 or P895 to use U-Boot
|
||
assumes replacement of the vendor LG bootloader. Vendor
|
||
android firmwares will no longer be able to run on the
|
||
device. This replacement IS reversible.
|
||
|
||
Quick Start
|
||
-----------
|
||
|
||
- Build U-Boot
|
||
- Pack U-Boot into repart-block
|
||
- Flash repart-block into the eMMC
|
||
- Boot
|
||
- Self Upgrading
|
||
|
||
Build U-Boot
|
||
------------
|
||
|
||
Device support is implemented by applying config fragment to a generic
|
||
board defconfig. Valid fragments are ``p880.config`` and ``p895.config``.
|
||
|
||
.. code-block:: bash
|
||
|
||
$ export CROSS_COMPILE=arm-linux-gnueabi-
|
||
$ make x3_t30_defconfig p895.config # For LG Optimus Vu
|
||
$ make
|
||
|
||
After the build succeeds, you will obtain the final ``u-boot-dtb-tegra.bin``
|
||
image, ready for flashing (but check the next section for additional
|
||
adjustments).
|
||
|
||
Pack U-Boot into repar-block
|
||
----------------------------
|
||
|
||
``DISCLAMER!`` All questions related to re-crypt work should be
|
||
asked in re-crypt repo issues. NOT HERE!
|
||
|
||
re-crypt is a small script which packs ``u-boot-dtb-tegra.bin`` in
|
||
form usable by device. This process is required only on the first
|
||
installation or to recover the device in case of a failed update.
|
||
|
||
.. code-block:: bash
|
||
|
||
$ git clone https://github.com/clamor-s/re-crypt.git
|
||
$ cd re-crypt # place your u-boot-dtb-regra.bin here
|
||
$ ./re-crypt.sh -d p895
|
||
|
||
Script will produce you a ``repart-block.bin`` ready to flash.
|
||
|
||
Flash repart-block into the eMMC
|
||
--------------------------------
|
||
|
||
``DISCLAMER!`` All questions related to NvFlash should be asked
|
||
in the proper place. NOT HERE! Flashing repart-block will erase
|
||
all your eMMC, so make a backup before!
|
||
|
||
``repart-block.bin`` contains BCT and bootloader in encrypted state
|
||
in form which can just be written RAW at the start of eMMC.
|
||
|
||
.. code-block:: bash
|
||
|
||
$ wheelie --blob blob.bin
|
||
$ nvflash --resume --rawdevicewrite 0 1024 repart-block.bin
|
||
|
||
Boot
|
||
----
|
||
|
||
After flashing ``repart-block.bin`` the device should reboot and turn
|
||
itself off. This is normal behavior if no boot configuration is
|
||
found.
|
||
|
||
To boot Linux, U-Boot will look for an ``extlinux.conf`` on MicroSD
|
||
and then on eMMC. Additionally if Volume Down button is pressed
|
||
while booting device will enter bootmenu. Bootmenu contains entries
|
||
to mount MicroSD and eMMC as mass storage, fastboot, reboot, reboot
|
||
RCM, poweroff, enter U-Boot console and update bootloader (check next
|
||
chapter).
|
||
|
||
Flashing ``repart-block.bin`` eliminates vendor restriction on eMMC
|
||
and allows the user to use/partition it in any way the user desires.
|
||
|
||
Self Upgrading
|
||
--------------
|
||
|
||
Place your ``u-boot-dtb-tegra.bin`` on the first partition of the
|
||
eMMC (using ability of u-boot to mount it). Enter bootmenu, choose
|
||
update bootloader option with Power button and U-Boot should update
|
||
itself. Once the process is completed, U-Boot will ask to press any
|
||
button to reboot.
|