Add base documentation for BeaglePlay Signed-off-by: Nishanth Menon <n...@ti.com> --- Cc: Heinrich Schuchardt <heinrich.schucha...@canonical.com>
Changes Since V3: * Updated documentation to give a more clear overview of MMC partitions and flashing information. * Added OpenOCD debug documentation * Added LED status information and indication of various boot stages V3: https://lore.kernel.org/all/20230815164440.2713726-5...@ti.com/ V2: https://lore.kernel.org/u-boot/20230727234446.3651836-5...@ti.com/ V1: https://lore.kernel.org/all/20230725185253.2123433-7...@ti.com/ doc/board/ti/am62x_beagleplay.rst | 256 ++++++++++ doc/board/ti/img/beagleplay_emmc.svg | 697 +++++++++++++++++++++++++++ doc/board/ti/k3.rst | 1 + 3 files changed, 954 insertions(+) create mode 100644 doc/board/ti/am62x_beagleplay.rst create mode 100644 doc/board/ti/img/beagleplay_emmc.svg diff --git a/doc/board/ti/am62x_beagleplay.rst b/doc/board/ti/am62x_beagleplay.rst new file mode 100644 index 000000000000..5adb7b4c9ace --- /dev/null +++ b/doc/board/ti/am62x_beagleplay.rst @@ -0,0 +1,256 @@ +.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause +.. sectionauthor:: Nishanth Menon <n...@ti.com> + +AM62x Beagleboard.org Beagleplay +================================ + +Introduction: +------------- + +BeagleBoard.org BeaglePlay is an easy to use, affordable open source +hardware single board computer based on the Texas Instruments AM625 +SoC that allows you to create connected devices that work even at long +distances using IEEE 802.15.4g LR-WPAN and IEEE 802.3cg 10Base-T1L. +Expansion is provided over open standards based mikroBUS, Grove and +QWIIC headers among other interfaces. + +Further information can be found at: + +* Product Page: https://beagleplay.org/ +* Hardware documentation: https://git.beagleboard.org/beagleplay/beagleplay + +Boot Flow: +---------- +Below is the pictorial representation of boot flow: + +.. image:: img/boot_diagram_k3_current.svg + :alt: Boot flow diagram + +- On this platform, 'TI Foundational Security' (TIFS) functions as the + security enclave master while 'Device Manager' (DM), also known as the + 'TISCI server' in "TI terminology", offers all the essential services. + The A53/M4F (Aux core) sends requests to TIFS/DM to accomplish these + services, as illustrated in the diagram above. + +Sources: +-------- +.. include:: k3.rst + :start-after: .. k3_rst_include_start_boot_sources + :end-before: .. k3_rst_include_end_boot_sources + +Build procedure: +---------------- +0. Setup the environment variables: + +.. include:: k3.rst + :start-after: .. k3_rst_include_start_common_env_vars_desc + :end-before: .. k3_rst_include_end_common_env_vars_desc + +.. include:: k3.rst + :start-after: .. k3_rst_include_start_board_env_vars_desc + :end-before: .. k3_rst_include_end_board_env_vars_desc + +Set the variables corresponding to this platform: + +.. include:: k3.rst + :start-after: .. k3_rst_include_start_common_env_vars_defn + :end-before: .. k3_rst_include_end_common_env_vars_defn +.. code-block:: bash + + $ export UBOOT_CFG_CORTEXR="am62x_evm_r5_defconfig beagleplay_r5.config" + $ export UBOOT_CFG_CORTEXA="am62x_evm_a53_defconfig beagleplay_a53.config" + $ export TFA_BOARD=lite + $ # we dont use any extra TFA parameters + $ unset TFA_EXTRA_ARGS + $ export OPTEE_PLATFORM=k3-am62x + $ export OPTEE_EXTRA_ARGS="CFG_WITH_SOFTWARE_PRNG=y" + +.. include:: am62x_sk.rst + :start-after: .. am62x_evm_rst_include_start_build_steps + :end-before: .. am62x_evm_rst_include_end_build_steps + +Target Images +-------------- +Copy the below images to an SD card and boot: + +* tiboot3-am62x-gp-evm.bin from R5 build as tiboot3.bin +* tispl.bin_unsigned from Cortex-A build as tispl.bin +* u-boot.img_unsigned from Cortex-A build as uboot.img + +Image formats: +-------------- + +- tiboot3.bin + +.. image:: img/multi_cert_tiboot3.bin.svg + :alt: tiboot3.bin image format + +- tispl.bin + +.. image:: img/dm_tispl.bin.svg + :alt: tispl.bin image format + +Flash to eMMC +------------- + +The eMMC layout selected is user-friendly for developers. The +boot hardware partition of the eMMC only contains the fixed-size +tiboot3.bin image. This is because the contents of the boot partitions +need to run from the SoC's internal SRAM, which remains a fixed size +constant. The other components of the boot sequence, such as tispl.bin +and u-boot.img, are located in the /BOOT partition in the User Defined +Area (UDA) hardware partition of the eMMC. These components can vary +significantly in size, so readjusting the boot partition offsets is +not practical. + +.. image:: img/beagleplay_emmc.svg + :alt: eMMC partitions and boot file organization for BeaglePlay + +The following are the steps from Linux shell to program eMMC: + +.. code-block:: bash + + # # Enable Boot0 boot + # mmc bootpart enable 1 2 /dev/mmcblk0 + # mmc bootbus set single_backward x1 x8 /dev/mmcblk0 + # mmc hwreset enable /dev/mmcblk0 + + # # Clear eMMC boot0 + # echo '0' >> /sys/class/block/mmcblk0boot0/force_ro + # dd if=/dev/zero of=/dev/mmcblk0boot0 count=32 bs=128k + # # Write tiboot3.bin + # dd if=tiboot3.bin of=/dev/mmcblk0boot0 bs=128k + + # # Copy the rest of the boot binaries + # mount /dev/mmcblk0p1 /boot/firmware + # cp tispl.bin /boot/firmware + # cp u-boot.img /boot/firmware + # sync + +.. warning :: + + The U-Boot is configured to prioritize booting from an SD card if + it detects a valid boot partition and boot files on it, even if the + system initially booted from eMMC. The boot order is set as follows: + + * SD/MMC + * eMMC + * USB + * PXE + +LED patterns during boot +------------------------ + +.. list-table:: USR LED status indication + :widths: 16 16 + :header-rows: 1 + + * - USR LEDs (012345) + - Indicates + + * - 00000 + - Boot failure or R5 image not started up + + * - 11111 + - A53 SPL/U-boot has started up + + * - 10101 + - OS boot process has been initiated + + * - 01010 + - OS boot process failed and drops to U-Boot shell + +.. note :: + + In the table above, 0 indicates LED switched off and 1 indicates LED + switched ON. + +.. warning :: + + If the "red" power LED is not glowing, the system power supply is not + functional. Please refer to `BeaglePlay documentation + <https://beagleplay.org/>`_ for further information. + +A53 SPL DDR Memory Layout +------------------------- + +.. include:: am62x_sk.rst + :start-after: .. am62x_evm_rst_include_start_ddr_mem_layout + :end-before: .. am62x_evm_rst_include_end_ddr_mem_layout + +Switch Setting for Boot Mode +---------------------------- + +The boot time option is configured via "USR" button on the board. +See `Beagleplay Schematics <https://git.beagleboard.org/beagleplay/beagleplay/-/blob/main/BeaglePlay_sch.pdf>`_ +for details. + +.. list-table:: Boot Modes + :widths: 16 16 16 + :header-rows: 1 + + * - USR Switch Position + - Primary Boot + - Secondary Boot + + * - Not Pressed + - eMMC + - UART + + * - Pressed + - SD/MMC File System (FS) mode + - USB Device Firmware Upgrade (DFU) mode + +To switch to SD card boot mode, hold the USR button while powering on +with Type-C power supply, then release when power LED lights up. + +Debugging U-Boot +---------------- + +See :ref:`Common Debugging environment - OpenOCD<k3_rst_refer_openocd>`: for +detailed setup and debugging 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_tag_connect + :end-before: .. k3_rst_include_end_openocd_connect_tag_connect + +.. include:: k3.rst + :start-after: .. k3_rst_include_start_openocd_cfg_external_intro + :end-before: .. k3_rst_include_end_openocd_cfg_external_intro + +For example, with BeaglePlay (AM62X platform), the 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 am625 + } + + 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 diff --git a/doc/board/ti/img/beagleplay_emmc.svg b/doc/board/ti/img/beagleplay_emmc.svg new file mode 100644 index 000000000000..2dec871d6fdd --- /dev/null +++ b/doc/board/ti/img/beagleplay_emmc.svg @@ -0,0 +1,697 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!--SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause--> + +<!--Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/--> + +<svg + version="1.1" + width="771px" + height="351px" + viewBox="-0.5 -0.5 771 351" + id="svg142" + sodipodi:docname="beagleplay_emmc.svg" + inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"; 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+ target="_blank" + id="a138"> + <text + text-anchor="middle" + font-size="10px" + x="50%" + y="100%" + id="text136">Text is not SVG - cannot display</text> + </a> + </switch> +</svg> diff --git a/doc/board/ti/k3.rst b/doc/board/ti/k3.rst index 5f9bd4dfcbe9..ef31ccd12a42 100644 --- a/doc/board/ti/k3.rst +++ b/doc/board/ti/k3.rst @@ -30,6 +30,7 @@ K3 Based SoCs .. toctree:: :maxdepth: 1 + am62x_beagleplay am62x_sk ../toradex/verdin-am62 am64x_evm -- 2.40.0
