[U-Boot] u-boot Marvell ethernet switch development

[Chris Packham]

Hi Dennis,

On Thu, May 3, 2018 at 3:21 AM Dennis Jacobs <
dennis.jacobs2 at prodrive-technologies.com> wrote:

> Dear U-boot mailing list,

> Its the first time I make use of this U-boot mailing list. I am here for
a problem I am having recently with u-boot which is part of my graduation
project.

Welcome.

A couple of minor nit-pick things to start.

If you can please try to send email as plain text and rather that images
paste console output and code snippets directly in-line.

Many people on this list prefer reading it in a text-base MUA like alpine
or mutt so messages with HTML and images tend to get ignored, which cuts
you off from people that may be able to help. Plain text also works best
for the mailing list archive which really helps people when searching.

> I am developing firmware for a Marvell Ethernet switch chip (98DX3336) on
the RD-XC3-24G4XG-B (Marvell Ethernet switch). Marvell has provided me with
U-boot binary files for UART, SPI etc.

Technically speaking you should be directing your questions to Marvell
since this board doesn't exist upstream and they're shipping a modified
u-boot. But you're in luck because I happen to have one of those boards as
well and I think I might know what's going on.

> I managed to load the U-boot UART binary file trough the UART interface.
Showing:

> [cid:image003.png at 01D3E22C.D21A6560]



> Ok so that is good... now I need to set up my own u-boot environment to
add some changes. So I did. I Downloaded u-boot 2013.01 and added marvell
configurations. I was able to compile and load the U-boot Uart binary
trough the UART interface. The terminal is showing the following:



> [cid:image004.png at 01D3E22D.C73E7040]


> So ok its loads! But now... I can not perform any commands. All commands
are Unknown...
> So what I did was checking the configurations and I found out that I have
set the CMD configurations. Like CMD_NET etc etc

> [cid:image005.png at 01D3E22E.7D8A6070]

> Anny one that could help me here? I would really appreciate it. I am
struggling with this problem for almost 2 full days now.
> Actions I have been taken

> -          Tested if help command was realy executed and no other
invisible fragments where added.


I think it is actually this.

Are you using hyperterm by any chance? I hit a problem a while back where
hyperterm worked fine for a while but then started adding other invisible
characters to my input which in-turn caused every command to be rejected.
Particularly if I'd used the uart boot. My primary environment is Linux so
I'm not sure what people are using for a terminal emulator on Windows these
days. When I last used a windows box for work teraterm
https://ttssh2.osdn.jp/index.html.en was the terminal emulator we used.

The uart tx/rx lines on the RD-XC3 board don't appear to be well
controlled, there always seems to be a bit of junk captured around reset
due to the lines floating. So even if it's not your terminal emulator
getting confused your host UART driver might be.

The fact that you've proven your built image boots over uart means the spi
version should work. So I'd recommend just updating what's on the board
(make sure you feed it the spi.bin not the spi-uart.bin). If it all goes
catastrophically wrong you can still recover the system over uart.

> -          Tested the compilation with 7 different armv7-marvell cross
compilers

> Left binary is the working one the second binary is mine. It only differs
26 bytes. I noticed that a different cross compiler also changes the size.
Sometime more sometimes less. All of the binarys I compiled where executing
correctly but not reacting on anny commands

> [cid:image006.png at 01D3E22F.61EE8C00]

> Please help me.

> Kind regards,

> Dennis Jacobs
> Designer

> [Prodrive B.V.]<http://www.prodrive-technologies.com/>
> Mobile

> +31 62 57 28 194

> Phone

> +31 40 26 76 200


> www.prodrive-technologies.com<http://www.prodrive-technologies.com>

> [cid:image002.png at 01D3E22B.A33384D0]

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