[PATCH v3 5/6] docs: board: ti: Add j721s2_evm documentation
Manorit Chawdhry
m-chawdhry at ti.com
Mon Sep 4 06:55:30 CEST 2023
Hi Nishanth,
On 14:15-20230901, Nishanth Menon wrote:
> On 12:32-20230901, Manorit Chawdhry wrote:
> > The documentation is based off J7200 documentation tailored for J721S2.
>
> You can drop the documentation based off j7200... Just state this
> documentation is for J721S2.
>
> >
> > TRM for J721S2: https://www.ti.com/lit/pdf/spruj28
> > Product Page: https://www.ti.com/product/TDA4AL-Q1
> >
> > Reviewed-by: Neha Malcom Francis <n-francis at ti.com>
> > Signed-off-by: Manorit Chawdhry <m-chawdhry at ti.com>
> > ---
> > doc/board/ti/j721s2_evm.rst | 298 ++++++++++++++++++++++++++++++++++++++++++++
> > doc/board/ti/k3.rst | 1 +
> > 2 files changed, 299 insertions(+)
>
> Thanks for including am68_sk documentation
>
> >
> > diff --git a/doc/board/ti/j721s2_evm.rst b/doc/board/ti/j721s2_evm.rst
> > new file mode 100644
> > index 000000000000..6b091ad37578
> > --- /dev/null
> > +++ b/doc/board/ti/j721s2_evm.rst
> > @@ -0,0 +1,298 @@
> > +.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
> > +.. sectionauthor:: Manorit Chawdhry <m-chawdhry at ti.com>
> > +
> > +J721S2 and AM68 Platforms
> > +=========================
> > +
> > +Introduction:
> > +-------------
> > +The J721S2 family of SoCs are part of K3 Multicore SoC architecture platform
> > +targeting automotive applications. They are designed as a low power, high
> > +performance and highly integrated device architecture, adding significant
> > +enhancement on processing power, graphics capability, video and imaging
> > +processing, virtualization and coherent memory support.
> > +
> > +The AM68 Starter Kit/Evaluation Module (EVM) is based on the J721S2 family
> > +of SoCs. They are designed for machine vision, traffic monitoring, retail
> > +automation, and factory automation.
> > +
> > +The device is partitioned into three functional domains, each containing
> > +specific processing cores and peripherals:
> > +
> > +1. Wake-up (WKUP) domain:
> > + * ARM Cortex-M4F processor, runs TI Foundational Security (TIFS)
> > +
> > +2. Microcontroller (MCU) domain:
> > + * Dual core ARM Cortex-R5F processor, runs device management
> > + and SoC early boot
>
> Just use a single space for spacing?
>
> > +
> > +3. MAIN domain:
> > + * Dual core 64-bit ARM Cortex-A72, runs HLOS
>
> just use a single space?
>
> > +
> > +More info can be found in TRM: https://www.ti.com/lit/pdf/spruj28
> > +
> [...]
>
> > +
> > +Target Images
> > +--------------
> > +In order to boot we need tiboot3.bin, tispl.bin and u-boot.img. Each SoC
> > +variant (GP, HS-FS, HS-SE) requires a different source for these files.
> > +
> > + - GP
> > +
> > + * tiboot3-j721s2-gp-evm.bin from :ref:`step 3.1 <j721s2_evm_rst_u_boot_r5>`
> > + * tispl.bin_unsigned, u-boot.img_unsigned from :ref:`step 3.2 <j721s2_evm_rst_u_boot_a72>`
> > +
> > + - HS-FS
> > +
> > + * tiboot3-j721s2-hs-fs-evm.bin from :ref:`step 3.1 <j721s2_evm_rst_u_boot_r5>`
> > + * tispl.bin, u-boot.img from :ref:`step 3.2 <j721s2_evm_rst_u_boot_a72>`
> > +
> > + - HS-SE
> > +
> > + * tiboot3-j721s2-hs-evm.bin from :ref:`step 3.1 <j721s2_evm_rst_u_boot_r5>`
> > + * tispl.bin, u-boot.img from :ref:`step 3.2 <j721s2_evm_rst_u_boot_a72>`
>
> Use a single space? to separate. I think we should probably clean up
> the other docs as follow on.
>
> > +
> > +Image formats:
> > +--------------
> > +
> [...]
>
> > +Switch Setting for Boot Mode
> > +----------------------------
> > +
> > +Boot Mode pins provide means to select the boot mode and options before the
> > +device is powered up. After every POR, they are the main source to populate
> > +the Boot Parameter Tables.
> > +
> > +Boot Mode Pins for J721S2
>
> J721S2-EVM ?
>
> > +^^^^^^^^^^^^^^^^^^^^^^^^^
> > +
>
> [...]
>
> > +
> > +For SW8 and SW9, the switch state in the "ON" position = 1.
> > +
> > +Boot Mode Pins for AM68
>
> SK-AM68 ?
>
> [..]
>
> > +Debugging U-Boot
> > +----------------
> > +
> > +See :ref:`Common Debugging environment - OpenOCD<k3_rst_refer_openocd>`: for
> > +detailed setup information.
> > +
> > +.. warning::
> > +
> > + **OpenOCD support since**: v0.12.0
> > +
> > + If the default package version of OpenOCD in your development
> > + environment's distribution needs to be updated, it might be necessary to
> > + build OpenOCD from the source.
> > +
> > +.. include:: k3.rst
> > + :start-after: .. k3_rst_include_start_openocd_connect_XDS110
> > + :end-before: .. k3_rst_include_end_openocd_connect_XDS110
> > +
> > +To start OpenOCD and connect to the board
> > +
> > +.. code-block:: bash
> > +
> > + openocd -f board/ti_j721s2evm.cfg
>
> This will work for the evm, but the am68-SK doesn't seem to have XDS110
> on board.
>
> You will need the following sections to help debug on SK-AM68:
> k3_rst_include_start_openocd_connect_cti20
> and:
> k3_rst_include_start_openocd_cfg_external_intro
>
> and:
> openocd_connect.cfg:
>
> .. code-block:: tcl
>
> # TUMPA example:
> # http://www.tiaowiki.com/w/TIAO_USB_Multi_Protocol_Adapter_User's_Manual
> source [find interface/ftdi/tumpa.cfg]
>
> transport select jtag
>
> # default JTAG configuration has only SRST and no TRST
> reset_config srst_only srst_push_pull
>
> # delay after SRST goes inactive
> adapter srst delay 20
>
> if { ![info exists SOC] } {
> # Set the SoC of interest
> set SOC j721s2
> }
>
> source [find target/ti_k3.cfg]
>
> ftdi tdo_sample_edge falling
>
> # Speeds for FT2232H are in multiples of 2, and 32MHz is tops
> # max speed we seem to achieve is ~20MHz.. so we pick 16MHz
> adapter speed 16000
>
Will be sending a v4 with the fixes. Thanks for reviewing!
Regards,
Manorit
> > diff --git a/doc/board/ti/k3.rst b/doc/board/ti/k3.rst
> > index 5f9bd4dfcbe9..423d55526dc5 100644
> > --- a/doc/board/ti/k3.rst
> > +++ b/doc/board/ti/k3.rst
> > @@ -36,6 +36,7 @@ K3 Based SoCs
> > am65x_evm
> > j7200_evm
> > j721e_evm
> > + j721s2_evm
> >
> > Boot Flow Overview
> > ------------------
> >
> > --
> > 2.41.0
> >
>
> --
> Regards,
> Nishanth Menon
> Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D
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