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doc: board: ti: Add AM62A documentation
Add generic boot-flow diagrams, and SoC-specific info around build steps. Signed-off-by: Jai Luthra <j-luthra@ti.com> Signed-off-by: Nishanth Menon <nm@ti.com>
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Jai Luthra
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doc/board/ti/am62ax_sk.rst
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doc/board/ti/am62ax_sk.rst
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.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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.. sectionauthor:: Jai Luthra <j-luthra@ti.com>
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AM62A Platforms
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===============
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Introduction:
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-------------
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The AM62A SoC family is built on the K3 Multicore SoC architecture platform,
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providing a deep learning accelerator, multi-camera support with ISP, video
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transcoder and other BOM-saving integrations.
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The AM62A SoC enables cost-sensitive automotive applications including driver
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and in-cabin monitoring systems, next generation of eMirror system, as well as
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a broad set of industrial applications in Factory Automation, Building
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Automation, Robotics and more.
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Some highlights of this SoC are:
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* Quad-Cortex-A53s (running up to 1.4GHz) in a single cluster.
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* Cortex-R5F for general-purpose or safety usage.
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* Deep Learning Accelerator with Single-core C7x Vector DSP with MMA (up to
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1.0GHz).
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* Vision Processing Accelerator (VPAC) with a 315MPixel/s ISP (up to 5MP @
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60fps) supporting 16-bit RAW input with RGB-IR separation.
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* 4K Video encoder and decoder for HEVC (Level 5.1 High-tier) and H.264 (Level
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5.2) supporting upto 240MPixels/s and MJPEG encoder at 416MPixels/s
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* Single display with 24-bit RGB parallel (DPI) interface supporting upto
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165Mhz pixel clock for 2K resolution.
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* Integrated Giga-bit Ethernet switch supporting up to a total of two
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external ports (TSN capable).
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* 9xUARTs, 5xSPI, 6xI2C, 2xUSB2, 3xCAN-FD, 3x eMMC and SD, GPMC for
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NAND/FPGA connection, OSPI memory controller, 3xMcASP for audio,
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1x CSI-RX-4L for Camera, eCAP/eQEP, ePWM, among other peripherals.
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* Dedicated Centralized System Controller for Security, Power, and
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Resource Management.
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* Multiple low power modes support, ex: Deep sleep, Standby, MCU-only,
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enabling battery powered system design.
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More details can be found in the Technical Reference Manual:
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https://www.ti.com/lit/pdf/spruj16
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Platform information:
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* https://www.ti.com/tool/SK-AM62A-LP
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Boot Flow:
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----------
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Below is the pictorial representation of boot flow:
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.. image:: img/boot_diagram_k3_current.svg
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:alt: Boot flow diagram
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- Here TIFS acts as master and provides all the critical services. R5/A53
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requests TIFS to get these services done as shown in the above diagram.
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Sources:
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--------
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.. include:: ../ti/k3.rst
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:start-after: .. k3_rst_include_start_boot_sources
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:end-before: .. k3_rst_include_end_boot_sources
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Build procedure:
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----------------
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0. Setup the environment variables:
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.. include:: ../ti/k3.rst
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:start-after: .. k3_rst_include_start_common_env_vars_desc
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:end-before: .. k3_rst_include_end_common_env_vars_desc
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.. include:: ../ti/k3.rst
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:start-after: .. k3_rst_include_start_board_env_vars_desc
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:end-before: .. k3_rst_include_end_board_env_vars_desc
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Set the variables corresponding to this platform:
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.. include:: ../ti/k3.rst
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:start-after: .. k3_rst_include_start_common_env_vars_defn
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:end-before: .. k3_rst_include_end_common_env_vars_defn
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.. code-block:: bash
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$ export UBOOT_CFG_CORTEXR=am62ax_evm_r5_defconfig
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$ export UBOOT_CFG_CORTEXA=am62ax_evm_a53_defconfig
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$ export TFA_BOARD=lite
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$ # we dont use any extra TFA parameters
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$ unset TFA_EXTRA_ARGS
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$ export OPTEE_PLATFORM=k3-am62ax
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$ # we dont use any extra OPTEE parameters
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$ unset OPTEE_EXTRA_ARGS
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1. Trusted Firmware-A:
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.. include:: ../ti/k3.rst
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:start-after: .. k3_rst_include_start_build_steps_tfa
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:end-before: .. k3_rst_include_end_build_steps_tfa
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2. OP-TEE:
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.. include:: ../ti/k3.rst
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:start-after: .. k3_rst_include_start_build_steps_optee
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:end-before: .. k3_rst_include_end_build_steps_optee
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3. U-Boot:
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* 3.1 R5:
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.. include:: ../ti/k3.rst
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:start-after: .. k3_rst_include_start_build_steps_spl_r5
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:end-before: .. k3_rst_include_end_build_steps_spl_r5
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* 3.2 A53:
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.. include:: ../ti/k3.rst
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:start-after: .. k3_rst_include_start_build_steps_uboot
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:end-before: .. k3_rst_include_end_build_steps_uboot
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Target Images
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--------------
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In order to boot we need tiboot3.bin, tispl.bin and u-boot.img. Each SoC
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variant (GP, HS-FS, HS-SE) requires a different source for these files.
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- GP
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* tiboot3-am62ax-gp-evm.bin from step 3.1
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* tispl.bin_unsigned, u-boot.img_unsigned from step 3.2
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- HS-FS
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* tiboot3-am62ax-hs-fs-evm.bin from step 3.1
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* tispl.bin, u-boot.img from step 3.2
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- HS-SE
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* tiboot3-am62ax-hs-evm.bin from step 3.1
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* tispl.bin, u-boot.img from step 3.2
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Image formats:
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--------------
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- tiboot3.bin
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.. image:: img/multi_cert_tiboot3.bin.svg
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:alt: tiboot3.bin image format
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- tispl.bin
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.. image:: img/dm_tispl.bin.svg
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:alt: tispl.bin image format
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Switch Setting for Boot Mode
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----------------------------
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Boot Mode pins provide means to select the boot mode and options before the
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device is powered up. After every POR, they are the main source to populate
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the Boot Parameter Tables.
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The following table shows some common boot modes used on AM62 platform. More
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details can be found in the Technical Reference Manual:
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https://www.ti.com/lit/pdf/spruj16 under the `Boot Mode Pins` section.
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.. list-table:: Boot Modes
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:widths: 16 16 16
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:header-rows: 1
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* - Switch Label
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- SW2: 12345678
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- SW3: 12345678
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* - SD
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- 01000000
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- 11000010
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* - OSPI
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- 00000000
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- 11001110
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* - EMMC
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- 00000000
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- 11010010
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* - UART
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- 00000000
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- 11011100
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* - USB DFU
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- 00000000
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- 11001010
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For SW2 and SW1, the switch state in the "ON" position = 1.
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Debugging U-Boot
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----------------
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See :ref:`Common Debugging environment - OpenOCD<k3_rst_refer_openocd>`: for
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detailed setup information.
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.. warning::
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**OpenOCD support since**: August 2023 (git master)
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Until the next stable release of OpenOCD is available in your development
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environment's distribution, it might be necessary to build OpenOCD `from the
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source <https://github.com/openocd-org/openocd>`_.
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.. include:: k3.rst
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:start-after: .. k3_rst_include_start_openocd_connect_XDS110
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:end-before: .. k3_rst_include_end_openocd_connect_XDS110
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To start OpenOCD and connect to the board
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.. code-block:: bash
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openocd -f board/ti_am62a7evm.cfg
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@@ -30,6 +30,7 @@ K3 Based SoCs
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.. toctree::
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:maxdepth: 1
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am62ax_sk
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am62x_sk
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../beagle/am62x_beagleplay
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../toradex/verdin-am62
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