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The MSM8916/APQ8016 Technical Reference Manual is publicly available and contains a lot of useful register maps for many core parts of the SoC. Include an archive.org link to it in the dragonboard410c documentation. Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
48 lines
1.8 KiB
ReStructuredText
48 lines
1.8 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
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.. sectionauthor:: Stephan Gerhold <stephan@gerhold.net>
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DragonBoard 410c
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================
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The DragonBoard 410c is a development board based on the Qualcomm APQ8016E SoC.
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More information can be found on the `96Boards product page`_.
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U-Boot can be used as a replacement for Qualcomm's original Android bootloader
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(a fork of Little Kernel/LK). Like LK, it is installed directly into the ``aboot``
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partition. Note that the U-Boot port used to be loaded as an Android boot image
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through LK. This is no longer the case, now U-Boot can replace LK entirely.
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.. _96Boards product page: https://www.96boards.org/product/dragonboard410c/
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.. _MSM8916/SD410/APQ8016 Technical Reference Manual: https://web.archive.org/web/20210525022203/https://developer.qualcomm.com/qfile/35259/lm80-p0436-100_d_snapdragon_410e_apq8016e_tech_reference_manual_revd.pdf
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Installation
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------------
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First, setup ``CROSS_COMPILE`` for aarch64. Then, build U-Boot for ``dragonboard410c``::
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$ export CROSS_COMPILE=<aarch64 toolchain prefix>
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$ make dragonboard410c_defconfig
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$ make
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This will build ``u-boot.elf`` in the configured output directory.
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Although the DragonBoard 410c does not have secure boot set up by default,
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the firmware still expects firmware ELF images to be "signed". The signature
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does not provide any security in this case, but it provides the firmware with
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some required metadata.
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To "sign" ``u-boot.elf`` you can use e.g. `qtestsign`_::
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$ ./qtestsign.py aboot u-boot.elf
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Then install the resulting ``u-boot-test-signed.mbn`` to the ``aboot`` partition
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on your device, e.g. with ``fastboot flash aboot u-boot-test-signed.mbn``.
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U-Boot should be running after a reboot (``fastboot reboot``).
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.. _qtestsign: https://github.com/msm8916-mainline/qtestsign
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Usage
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-----
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Press Volume Down during boot to enter Fastboot mode.
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