doc: board: ti: Add J722S-EVM documentation
Introduce basic documentation for the J722S-EVM. Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com> Reviewed-by: Neha Malcom Francis <n-francis@ti.com>
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.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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.. sectionauthor:: Jayesh Choudhary <j-choudhary@ti.com>
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J722S-EVM Platform
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==================
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The J722S is a family of application processors built for Automotive and
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Linux Application development. J722S family of SoCs is a superset of the
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AM62P SoC family and shares similar memory map, thus the nodes are being
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reused from AM62P includes instead of duplicating the definitions.
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Some highlights of J722S SoC (in addition to AM62P SoC features) are:
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* Two Cortex-R5F for Functional Safety or general-purpose usage and
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two C7x floating point vector DSP with Matrix Multiply Accelerator
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for deep learning.
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* Vision Processing Accelerator (VPAC) with image signal processor
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and Depth and Motion Processing Accelerator (DMPAC).
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* 7xUARTs, 3xSPI, 5xI2C, 2xUSB2, 2xCAN-FD, 3xMMC and SD, GPMC for
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NAND/FPGA connection, OSPI memory controller, 5xMcASP for audio,
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4xCSI-RX for Camera, 1 PCIe Gen3 controller, USB3.0 eCAP/eQEP,
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ePWM, among other peripherals.
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For those interested, more details about this SoC can be found in the
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Technical Reference Manual here: https://www.ti.com/lit/zip/sprujb3
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Boot Flow:
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----------
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The bootflow is exactly the same as all SoCs in the am62xxx extended SoC
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family. Below is the pictorial representation:
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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=j722s_evm_r5_defconfig
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$ export UBOOT_CFG_CORTEXA=j722s_evm_a53_defconfig
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$ export TFA_BOARD=lite
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$ export OPTEE_PLATFORM=k3-am62x
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$ export OPTEE_EXTRA_ARGS="CFG_WITH_SOFTWARE_PRNG=y"
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.. j722s_evm_rst_include_start_build_steps
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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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.. j722s_evm_rst_include_end_build_steps
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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 (HS-FS, HS-SE) requires a different source for these files.
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- HS-FS
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* tiboot3-j722s-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-j722s-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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A53 SPL DDR Memory Layout
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-------------------------
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.. j722s_evm_rst_include_start_ddr_mem_layout
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This provides an overview memory usage in A53 SPL stage.
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.. list-table::
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:widths: 16 16 16
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:header-rows: 1
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* - Region
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- Start Address
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- End Address
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* - EMPTY
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- 0x80000000
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- 0x80080000
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* - TEXT BASE
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- 0x80080000
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- 0x800d8000
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* - EMPTY
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- 0x800d8000
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- 0x80477660
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* - STACK
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- 0x80477660
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- 0x80477e60
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* - GD
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- 0x80477e60
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- 0x80478000
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* - MALLOC
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- 0x80478000
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- 0x80480000
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* - EMPTY
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- 0x80480000
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- 0x80a00000
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* - BSS
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- 0x80a00000
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- 0x80a80000
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* - BLOBS
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- 0x80a80000
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- 0x80d00400
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* - EMPTY
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- 0x80d00400
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- 0x81000000
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.. j722s_evm_rst_include_end_ddr_mem_layout
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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 J722S-EVM
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platform. More details can be found in the Technical Reference Manual:
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https://www.ti.com/lit/zip/sprujb3 under the `Boot Mode Pins` section.
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.. note::
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This device is very new. Currently only UART boot is available while
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we continue to add support for the other bootmodes.
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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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- SW3: 12345678
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- SW4: 12345678
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* - SD
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- 11000010
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- 01000000
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* - OSPI
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- 11001110
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- 00000000
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* - EMMC
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- 11010010
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- 00000000
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* - UART
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- 11011100
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- 00000000
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* - USB DFU
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- 11001010
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- 00000000
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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 after**: v0.12.0
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While support for the entire K3 generation including the am62xxx
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extended family was added before v0.12.0, the tcl scripts for the
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am62px have been accepted and will be available in the next release of
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OpenOCD. It may be necessary to build OpenOCD from source depending on
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the version your distribution has packaged.
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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_j722sevm.cfg
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@@ -42,6 +42,7 @@ K3 Based SoCs
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../beagle/j721e_beagleboneai64
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j721e_evm
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j721s2_evm
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j722s_evm
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j784s4_evm
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Boot Flow Overview
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