[U-Boot-Users] MAC address setting

[U-Boot-Users] MAC address setting

[Jevgeni Zolotarjov]

Hi all!

I have custom designed ARM board, based on AT91RM9200EK reference design. 
Hardware works fine.
And I have following problem: When U-boot loads Kernel image from tftp, 
everything fine. When U-Boot starts kernel from flash, then Linux cannot 
communicate to ethernet device. I understand, that this is because MAC 
address was not set by U-Boot. But I could not find a command to initialise 
Ethernet.
Please advice, how to act.

Best regards,
Jevgeni 

[U-Boot-Users] MAC address setting

[Wolfgang Denk]

In message <e8i8ho$5ch$1@sea.gmane.org> you wrote:
> 
> And I have following problem: When U-boot loads Kernel image from tftp, 
> everything fine. When U-Boot starts kernel from flash, then Linux cannot 
> communicate to ethernet device. I understand, that this is because MAC 
> address was not set by U-Boot. But I could not find a command to initialise 
> Ethernet.
> Please advice, how to act.

Please read the FAQ: http://www.denx.de/wiki/view/DULG/EthernetDoesNotWorkInLinux

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
You can fool some of the people all of the time, and You can fool all
of the people some of the time, but You can't fool mom.

[U-Boot-Users] MAC address setting

[Kiran Jammula]

There are many ways to set the MAC address with U-boot.
you can hard code the MAC address in include/configs/xxx.h where xxx.h is 
your board configuration file.

You can also develop command to accept the MAC address and put in EEPROM of 
MAC controller.
It is not so difficult. Go through the drivers directory and check the file 
for your MAC controller.

One more way of assigning the MAC address is asign it in your boot scripts
using  the command
ifconfig eth0 hw ether MACADDR

Best Regards
Kiran Jammula.




>From: "Jevgeni Zolotarjov" <zhenja@zlo.ee>
>To: u-boot-users at lists.sourceforge.net
>Subject: [U-Boot-Users] MAC address setting
>Date: Thu, 6 Jul 2006 08:53:17 +0300
>
>Hi all!
>
>I have custom designed ARM board, based on AT91RM9200EK reference design.
>Hardware works fine.
>And I have following problem: When U-boot loads Kernel image from tftp,
>everything fine. When U-Boot starts kernel from flash, then Linux cannot
>communicate to ethernet device. I understand, that this is because MAC
>address was not set by U-Boot. But I could not find a command to initialise
>Ethernet.
>Please advice, how to act.
>
>Best regards,
>Jevgeni
>
>
>
>
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>_______________________________________________
>U-Boot-Users mailing list
>U-Boot-Users at lists.sourceforge.net
>https://lists.sourceforge.net/lists/listinfo/u-boot-users

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[U-Boot-Users] MAC address setting

[Mirco Fuchs]

> Hi all!
> 
> I have custom designed ARM board, based on AT91RM9200EK reference design. 
> Hardware works fine.
> And I have following problem: When U-boot loads Kernel image from tftp, 
> everything fine. When U-Boot starts kernel from flash, then Linux cannot 
> communicate to ethernet device. I understand, that this is because MAC 
> address was not set by U-Boot. But I could not find a command to initialise 
> Ethernet.

I have the same problem with an other AT91RM9200 based board, but 
this is not an u-boot issue. The kernel driver for the emac should 
initialize this correctly, but this is obviously not the case. I 
worked around this problem by doing a ping manually before booting 
linux or by inserting the eth_init() function call in 
start_armboot().

Regards

Mirco

[U-Boot-Users] MAC address setting

[Wolfgang Denk]

In message <BAY121-F10E8C00BC2499BA458BAC9C3770@phx.gbl> you wrote:
> There are many ways to set the MAC address with U-boot.

True. But the fact is, that U-Boot normally doies  NOT  set  the  MAC
address  at  all - not unless it needs it for U-0Boot operations like
network related commands.

> you can hard code the MAC address in include/configs/xxx.h where xxx.h is 
> your board configuration file.

I'm sorry, but thisis a really stupid idea. You will end up with many
systems all using the same MAC address which is in violation  of  the
standards and will cause lots of nasty trouble later.

DON'T DO THIS!

> You can also develop command to accept the MAC address and put in EEPROM of 
> MAC controller.

Of course. But please understand that this is not U-Boot's responsibility.
It's a Linux driver issue.

> >From: "Jevgeni Zolotarjov" <zhenja@zlo.ee>
> >To: u-boot-users at lists.sourceforge.net
> >Subject: [U-Boot-Users] MAC address setting
> >Date: Thu, 6 Jul 2006 08:53:17 +0300

And please don't top post / full quote!!

See http://www.netmeister.org/news/learn2quote.html

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Violence in reality is quite different from theory.
	-- Spock, "The Cloud Minders", stardate 5818.4

[U-Boot-Users] MAC address setting

[Wolfgang Denk]

In message <44ACCBE1.32244.109A0E@mircofuchs.web.de> you wrote:
>
> initialize this correctly, but this is obviously not the case. I 
> worked around this problem by doing a ping manually before booting 
> linux or by inserting the eth_init() function call in 
> start_armboot().

I just want to point out that this is a really bad idea. Instead, you
should fixe the problem where it existis, i. e. in the Linux  driver.
If  you  want, implement a way to pass the MAC address from U-Boot to
Linux, either as a boot argument or by your platform-specific way  of
passing  such  parameters [I never understood why nobody came up with
an ATAG for the MAC address yet. But maybe this  would  just  be  too
simple.]

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Q:  Why do mountain climbers rope themselves together?
A:  To prevent the sensible ones from going home.

[U-Boot-Users] MAC address setting

[Peter Menzebach]

Hi,
as you can read here in the thread, you are sitting exactly between the 
chairs of Wolfgang and rmk ;) ...

http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2004-July/thread.html#23257

So you can either start a general discussion again, or put in the hack 
with eth_init() as suggested, or look for another bootloader ;) ...

Best regards
Peter

[U-Boot-Users] MAC address setting

[Wolfgang Denk]

In message <44ACDAB8.1000101@mw-itcon.de> you wrote:
>
> as you can read here in the thread, you are sitting exactly between the 
> chairs of Wolfgang and rmk ;) ...

Only as far as the ATAG for MAC address is concerned [and actually  I
don't  complain  of  propose  anything  - I just don't understand RMK
here.]

> So you can either start a general discussion again, or put in the hack 
> with eth_init() as suggested, or look for another bootloader ;) ...

Or pass some  "ethaddr="  boot  argument,  which  is  IMHO  the  most
sensible  thing  to do as it is architecture-independent (guess which
options are available on - say - MIPS systems?)

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
panic: can't find /

[U-Boot-Users] MAC address setting

[Zhukov]

Hello Jevgeni,

1. EMAC-address doesn't matter for Linux.
2. One of the uncountable ways of init Ethernet before Linux bootstrap,
is to call ping from the module, which implements the user command "loadm".

Regards,
Andrew Zhukov