[PATCH 2/2] doc: spacemit: bananapi_f3: document Banana Pi F3 board

[Kongyang Liu]

Heinrich Schuchardt <xypron.glpk at gmx.de> 于2024年7月14日周日 23:19写道：
>
> On 7/14/24 17:08, Kongyang Liu wrote:
> > Add document for Banana Pi F3 board which based on SpacemiT's K1 SoC.
> >
> > Signed-off-by: Kongyang Liu <seashell11234455 at gmail.com>
> > ---
> >
> >   doc/board/index.rst                |  1 +
> >   doc/board/spacemit/bananapi_f3.rst | 78 ++++++++++++++++++++++++++++++
> >   doc/board/spacemit/index.rst       |  8 +++
> >   3 files changed, 87 insertions(+)
> >   create mode 100644 doc/board/spacemit/bananapi_f3.rst
> >   create mode 100644 doc/board/spacemit/index.rst
> >
> > diff --git a/doc/board/index.rst b/doc/board/index.rst
> > index 417c128c7a..367da2d623 100644
> > --- a/doc/board/index.rst
> > +++ b/doc/board/index.rst
> > @@ -51,6 +51,7 @@ Board-specific doc
> >      sipeed/index
> >      socionext/index
> >      sophgo/index
> > +   spacemit/index
> >      st/index
> >      starfive/index
> >      ste/index
> > diff --git a/doc/board/spacemit/bananapi_f3.rst b/doc/board/spacemit/bananapi_f3.rst
> > new file mode 100644
> > index 0000000000..465040b94f
> > --- /dev/null
> > +++ b/doc/board/spacemit/bananapi_f3.rst
> > @@ -0,0 +1,78 @@
> > +.. SPDX-License-Identifier: GPL-2.0+
> > +
> > +Banana Pi F3
> > +============
> > +
> > +About This
> > +----------
> > +Banana Pi F3 board is a industrial grade RISC-V development board, it
> > +design with SpacemiT K1 8 core RISC-V chip, CPU integrates 2.0 TOPs AI
> > +computing power. 4G DDR and 16G eMMC onboard.2x GbE Ethernet prot, 4x USB
> > +3.0 and PCIe for M.2 interface, support HDMI and Dual MIPI-CSI Camera.
> > +
> > +Building
> > +~~~~~~~~
> > +1. Add the RISC-V toolchain to your PATH.
> > +2. Setup ARCH & cross compilation environment variable:
> > +
> > +.. code-block:: console
> > +
> > +   export CROSS_COMPILE=<riscv64 toolchain prefix>
> > +
> > +3. Before building U-Boot, OpenSBI should be built first. OpenSBI can be
> > +built for SpacemiT K1 SoC as below:
> > +
> > +.. code-block:: console
> > +
> > +   git clone https://github.com/cyyself/opensbi -b k1-opensbi
> > +   cd opensbi
> > +   make PLATFORM=generic
> > +
> > +4. Then build U-Boot as following:
> > +
> > +.. code-block:: console
> > +
> > +   cd <U-Boot-dir>
> > +   make bananapi_f3_defconfig
> > +   make OPENSBI=<OpenSBI-dir>/build/platform/generic/firmware/fw_dynamic.bin
> > +
> > +This will generate u-boot.itb
>
> Thanks a lot for the board documentation.
>
> Could you, please, describe how to install the u-boot.itb.
>
> To where should it be copied?
> Does it need to be signed to be accepted by the vendor SPL?
>

In the vendor's U-Boot SPL, OpenSBI and U-Boot are loaded separately. From
my observation, U-Boot seems to prefer loading a FIT image that includes
both OpenSBI and U-Boot. Therefore, I modified this part to allow them to
be loaded together. The modified code might be somewhat messy because I
just made it work.

As a result, it is currently difficult to describe how to boot into
U-Boot. Perhaps I can improve the documentation after U-Boot SPL is
available for Banana Pi F3.

Best regards
Kongyang Liu

> Best regards
>
> Heinrich
>
> > +
> > +Booting
> > +~~~~~~~
> > +Currently, we use a modified vendor's U-Boot SPL to load a FIT image that
> > +includes OpenSBI and U-Boot. Fully describing how to boot into U-Boot is a
> > +challenging task. And the booting method will be added after the SPL
> > +support is available.
> > +
> > +Sample boot log from Banana Pi F3 board
> > +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > +.. code-block:: none
> > +
> > +   U-Boot 2024.07-00686-g608f2d51760c (Jul 08 2024 - 14:53:51 +0800)
> > +
> > +   DRAM:  4 GiB
> > +   Core:  18 devices, 7 uclasses, devicetree: separate
> > +   Loading Environment from nowhere... OK
> > +   In:    serial at d4017000
> > +   Out:   serial at d4017000
> > +   Err:   serial at d4017000
> > +   Net:   No ethernet found.
> > +   bananapi_f3# cpu detail
> > +     0: cpu at 0      spacemit,x60
> > +      ID = 0, freq = 0 Hz: MMU
> > +     1: cpu at 1      spacemit,x60
> > +      ID = 1, freq = 0 Hz: MMU
> > +     2: cpu at 2      spacemit,x60
> > +      ID = 2, freq = 0 Hz: MMU
> > +     3: cpu at 3      spacemit,x60
> > +      ID = 3, freq = 0 Hz: MMU
> > +     4: cpu at 4      spacemit,x60
> > +      ID = 4, freq = 0 Hz: MMU
> > +     5: cpu at 5      spacemit,x60
> > +      ID = 5, freq = 0 Hz: MMU
> > +     6: cpu at 6      spacemit,x60
> > +      ID = 6, freq = 0 Hz: MMU
> > +     7: cpu at 7      spacemit,x60
> > +      ID = 7, freq = 0 Hz: MMU
> > +   bananapi_f3#
> > diff --git a/doc/board/spacemit/index.rst b/doc/board/spacemit/index.rst
> > new file mode 100644
> > index 0000000000..cc2bd6ab0a
> > --- /dev/null
> > +++ b/doc/board/spacemit/index.rst
> > @@ -0,0 +1,8 @@
> > +.. SPDX-License-Identifier: GPL-2.0+
> > +
> > +SpacemiT
> > +========
> > +.. toctree::
> > +   :maxdepth: 1
> > +
> > +   bananapi_f3
>