topic Re: write u-boot on mmc via uuu in i.MX Processors

write u-boot on mmc via uuu

fcastagnotto — Fri, 25 Jun 2021 14:20:32 GMT

Hi there, I'm trying to write the u-boot on the emmc of a som based on iMX6DL using UUU, but it doesn't work.

It seems that the UUU tool only download the u-boot into the ram and jump, returning me the console on the debug serial, but does not write directly the u-boot.imx passed, into the emmc.
I read into the UUU manual that is possible to write directly the u-boot using the command

./uuu -b emmc u-boot.imx

but I only get the download of the u-boot into the ram and the jump, but not the write.

Can anyone tell me if I done wrong?

Re: write u-boot on mmc via uuu

igorpadykov — Sat, 26 Jun 2021 05:29:45 GMT

Hi Francesco

had board passed ddr test and necessary dcd header changes were properly implemented in uboot sources.

Also it makes sense to check uuu min. revisiion, it is described in Release Notes for each BSP on link

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX?tab=In-Depth_Tab

Best regards
igor

Re: write u-boot on mmc via uuu

fcastagnotto — Mon, 28 Jun 2021 08:36:15 GMT

Re: write u-boot on mmc via uuu

fcastagnotto — Mon, 28 Jun 2021 08:36:37 GMT

Hi Igor,

thank you for the reply.
I don't know if the ddr tests were done and I don't find the dcd header in the source code of the uboot, but the SOM normally works, it correctly starts the uboot and the OS, the only my problem is using the uuu: do you think that this problem can be solved implementing the dcd header changes?
I tried to follow the link that you indicated and I downloaded another version of uuu (the last indicated for my iMX6DL) but I get the same idle condition: the uuu start, download the u-boot into the ram and it boots it, but the following commands are not executed and the uuu not returns.

I'm trying to pass this file as argument of uuu:

SDP: boot -f u-boot.imx SDPU: delay 1000 SDPU: write -f u-boot.imx SDPU: jump FB: ucmd setenv fastboot_dev mmc FB: flash bootloader u-boot.imx FB: done

but only the first command is executed

Re: write u-boot on mmc via uuu

igorpadykov — Fri, 09 Jul 2021 00:47:56 GMT

may be recommended to try uboot/linux from source.codeaurora.org/external/imx/linux-imx repository :

https://source.codeaurora.org/external/imx/uboot-imx/tree/?h=imx_v2020.04_5.4.70_2.3.0
https://source.codeaurora.org/external/imx/linux-imx/tree/?h=imx_5.4.70_2.3.0

Documentation:

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX?tab=In-Depth_Tab

DCD is described in sect.3.2.1 Changing the DCD table for i.MX DDR initialization i.MX Porting Guide

Best regards
igor