I saw some interesting changes for u-boot landing in theimage-builderSolidRun provides and almost coincidentally their customer service replied to my initial inquiry about the booting process.
That lead to some more tries and testing, I had yet to see if there is a linux kernel update that makes rebooting work as should, but at least now I know that the problem is just software.
Since I do not want to wipe the eMMC image all the time I asked them directions on how to just update the bootloader and they provided me with enough directions.
Since it isn't yet trivial to get the sources in the right shape here a short blogpost about it.
Getting the sources
Our point of truth is again theimage-builder since it contains the patches and how to apply them.
I'm using Gentoo so I just read therunme.sh and adapt it.
I want to useu-boot, the boot image is of theTrusted Firmware-A kind, so I need to fetchaft to assemble the whole thing andrcw to build the Pre-Boot Loader initialization code.
cd /usr/src# Get the build script and the patchsetsgit clone https://github.com/SolidRun/lx2160a_build# u-boot as the main bootloadergit clone https://source.codeaurora.org/external/qoriq/qoriq-components/u-boot# trusted firmware buildergit clone https://source.codeaurora.org/external/qoriq/qoriq-components/atf# pre-boot initialization compilergit clone https://source.codeaurora.org/external/qoriq/qoriq-components/rcwPatches
There are plenty and they apply on specific tags, I'm usingLSDK-20.04 as base.
The patches could live inpatches/<tool name> orpatches/<tool-name>-<tag>.
forainrcw u-boot;dopushd$a git checkout-b LSDK-20.04 refs/tags/LSDK-20.04 git am ../lx2160a_build/patches/$a-LSDK-20.04/*popddonepushdaftgit checkout-b LSDK-20.04 refs/tags/LSDK-20.04git am ../lx2160a_build/patches/aft/*popdBinary blobs
The script fetches and uses some binary blobs
cd aft/tools/fiptool/git clone https://github.com/NXP/ddr-phy-binary.gitmake./fiptool create --ddr-immem-udimm-1d ddr-phy-binary/lx2160a/ddr4_pmu_train_imem.bin --ddr-immem-udimm-2d ddr-phy-binary/lx2160a/ddr4_2d_pmu_train_imem.bin --ddr-dmmem-udimm-1d ddr-phy-binary/lx2160a/ddr4_pmu_train_dmem.bin --ddr-dmmem-udimm-2d ddr-phy-binary/lx2160a/ddr4_2d_pmu_train_dmem.bin --ddr-immem-rdimm-1d ddr-phy-binary/lx2160a/ddr4_rdimm_pmu_train_imem.bin --ddr-immem-rdimm-2d ddr-phy-binary/lx2160a/ddr4_rdimm2d_pmu_train_imem.bin --ddr-dmmem-rdimm-1d ddr-phy-binary/lx2160a/ddr4_rdimm_pmu_train_dmem.bin --ddr-dmmem-rdimm-2d ddr-phy-binary/lx2160a/ddr4_rdimm2d_pmu_train_dmem.bin fip_ddr_all.binBuilding
We need to buildu-boot and thercw images first and then put everything together with atf.
u-boot
pushdu-bootmake lx2160acex7_tfa_defconfigmake-j16exportBL33=$PWD/u-boot.binpopdNote: if you are using gcc-10, you should apply a patch on top of the set
diff --git a/scripts/dtc/dtc-lexer.l b/scripts/dtc/dtc-lexer.lindex fd825ebba6..24af549977 100644--- a/scripts/dtc/dtc-lexer.l+++ b/scripts/dtc/dtc-lexer.l@@ -38,7 +38,6 @@ LINECOMMENT "//".*\n #include "srcpos.h" #include "dtc-parser.tab.h"-YYLTYPE yylloc; extern bool treesource_error; /* CAUTION: this will stop working if we ever use yyless() or yyunput() */rcw
# Set the configuration for your memory timings and the SERDES configuration for your networking# Options at hand# DDR_SPEED=2400,2600,2900,3200exportDDR_SPEED=${DDR_SPEED:-3200}# SERDES=8_5_2, 13_5_2, 20_5_2exportSERDES=${SERDES:-8_5_2}exportSPEED=2000_700_${DDR_SPEED}pushdrcw/lx2160acex7mkdir-p RCWecho"#include <configs/lx2160a_defaults.rcwi>"> RCW/template.rcwecho"#include <configs/lx2160a_${SPEED}.rcwi>">> RCW/template.rcwecho"#include <configs/lx2160a_${SERDES}.rcwi>">> RCW/template.rcwmake cleanmake-j 16popdOnce those two componets are built we assemble everything in our image
pushdatfmakePLAT=lx2160acex7 cleanmake-j16PLAT=lx2160acex7 all fip pblRCW=../rcw/lx2160acex7/RCW/template.binTRUSTED_BOARD_BOOT=0GENERATE_COT=0BOOT_MODE=autoSECURE_BOOT=falseInbuild/lx2160acex7/release/fip.bin we have our final product if everything went well.
Flashing
The process itself is quite simple, you copy with dd the image to an offset of your boot device (either the eMMC/dev/mmcblk1 or the SD/dev/mmcblk0).
Note: just in case you might back up the firmware
ddif=/dev/mmcblk0of=backup-fip.binbs=512seek=2048conv=notruncAnd then overwrite it
ddif=build/lx2160acex7/release/fip.binof=/dev/mmcblk0bs=512seek=2048conv=notruncOnce you reboot you should look for something like:
U-Boot 2019.10-00019-g16209d0bf6 (Jul 08 2020 - 15:14:33 +0300)In the early boot messages.
Word of warning
The currentu-boot code available as today is fairly new and has two interesting features:
- u-boot is able to
poweroff(linux is not, yet, sadly) - u-boot would stop setting the fan at full blast
Make sure your kernel is able to drive the fans correctly otherwise the system will hit the shutdown temperature.
I'm looking forward the time this nice machine could power on and power off correctly.
Coming next
Hopefully I'll complete and publish some more information aboutrav1e, both its API and its internals.
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