IMX51, no ethernetaddress in linux

[woutervh]

Hello all,

We have a design, based on the IMX51 EVK. Bootloader is uboot and operating system is linux (2.6.31). Now I have this problem that linux seems to be unable to find its macaddress. It's defined in uboot though. So I'm unable to start the network once linux is started. If I boot the kernel from the network (tftp), everything is fine.

Anybody any clue?

[KrishnaPavan]

I have not tried NAND Flash, but can you check the setting through env. var. Even If you have to use NAND_Flash, you have to set it right!

[jai_appari]

Hi Wouter Vanhauwaert,

I am facing similar issue, could not able to start the network. If you found the solution could you please let us know.

The mac address in my case when I issue "ifconfig -a" shows 00:00:00:00:00:00 and thus the probable reason of not communicating over  the network. Let me be clear I am using static network settings to boot the kernel via NAND Flash and   have no issue regarding using NFS mode.

[hake]

just for reminder, the uboot must use with the same release of kernel, as there are some colock setting dependency.

[fabio_estevam]

Please try a more recent kernel, such as 2.6.35.

Regards,

Fabio Estevam

[ThomasL_]

Hi

Regarding your strange chars: As you probably already know, this is typically a baudrate setting. Since the bootloader obviously has the correct settings, you will also need to set the clocks correctly for the selected baudrate in the kernel. I don't know for sure, but I think there is some early_uart_setup which requires you to set the baudrate.

From your log it looks like the setting is simply wrong in the kernel.

[woutervh]

My board is connected via RS232

And I'm using putty in stead of minicom

The output you saw in previous post, was serial output (so the "Loading kernele and a lot of strange letters)

Krishna Pavan said:

That is what I have been telling.

I have some Questions to you?

1.Is your board connected via RS-232/Ethernet?

2.Is minicom installed? so that you can check through?

[KrishnaPavan]

That is what I have been telling.

I have some Questions to you?

1.Is your board connected via RS-232/Ethernet?

2.Is minicom installed? so that you can check through?

[woutervh]

Yes, but baudrate should be 115200, also set like that in uboot kernel args and kernel itself...

Krishna Pavan said:

You can change the baudrate and port from minicom.

I did not quite understand that "Serial OUtput".

[KrishnaPavan]

You can change the baudrate and port from minicom.

I did not quite understand that "Serial OUtput".

[woutervh]

I just rebuilt the kernel, and the address is now correct 70008000, however, there seems to be another problem (baudrate related? Something else? Serial output, then it hangs)

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Wouter Vanhauwaert said:

Yes, but I really know for sure that I selected the IMX51 everywhere. at the start of ltib, in ltib itself, as platform, ...

I did it in a new clean machine to double check... At the moment I'm recompiling after reconfiguring the kernel and sign of every other IMX-based board than the imx51bbg in the kernel architecture selection...

Krishna Pavan said:

You can change in the configuration when you are preparing your kernel image to be loaded.

Probably you may have to change and rebuild, if you have wrongly selected i.MX53

[woutervh]

Yes, but I really know for sure that I selected the IMX51 everywhere. at the start of ltib, in ltib itself, as platform, ...

I did it in a new clean machine to double check... At the moment I'm recompiling after reconfiguring the kernel and sign of every other IMX-based board than the imx51bbg in the kernel architecture selection...

Krishna Pavan said:

You can change in the configuration when you are preparing your kernel image to be loaded.

Probably you may have to change and rebuild, if you have wrongly selected i.MX53

[KrishnaPavan]

You can change in the configuration when you are preparing your kernel image to be loaded.

Probably you may have to change and rebuild, if you have wrongly selected i.MX53

[woutervh]

Yes, I know, and that's what concerns me. I selected the IMX51 everywhere I could. Only thing I left behind, was the kernel configuration, but I should think, it gets its configuration imx51-specific when selected everywhere else?

Thomas Linder said:

Are you sure you selected the i.MX51 where needed?

Because for the i.MX53 the DDR starts at 0x7000 0000

[ThomasL_]

Are you sure you selected the i.MX51 where needed?

Because for the i.MX53 the DDR starts at 0x7000 0000

[KrishnaPavan]

When fetching kernel image using TFTP, probably you can make any changes to the address, check and see

[woutervh]

Another issue I'm having. I just did a test by installing ltib 10.11.01 in a clean fresh ubuntu 11.04. After some alternations to the packagelist to be able for ltib to start, it compiles just fine, and I got a uImage file. When it tries to start, I get:

Load Address: 70008000
   Entry Point:  70008000

But this can't be correct. On the Imx51, RAM starts from only 90000000, so should be 90008000. As far as I know, I've selected the IMX51 Bbg everywhere... How can I change this? I know I can look at arch/arm/mach-mx5/Makefile.boot, but for the imx51, it's filled in as 90008000, so for some reason, I get another configuration...?

[woutervh]

I use Uboot

Relevant parts:

bootdelay=3
baudrate=115200
loadaddr=0x90800000
ethprime=FEC0
uboot_addr=0xa0000000
uboot=u-boot.bin
kernel=uImage
bootargs_base=setenv bootargs console=ttymxc0,115200
ethact=FEC0
ipaddr=10.0.56.91
ethaddr=00:0E:3D:10:01:C8
bootargs=noinitrd console=ttymxc0,115200 root=/dev/mmcblk0p2 ip=dhcp
serverip=10.0.40.22
bootargs_mmc=setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw init=/init
bootcmd=run bootcmd_mmc
bootcmd_mmc=run bootargs_base bootargs_mmc; mmc read 0 ${loadaddr} 0x800 0x1800;bootm
stdin=serial
stdout=serial
stderr=serial

And in Linux, eth0 is down, with an error while booting. But ifconfig eth0 gives me that the mac-addres is 00:00:00:00:00:00.

If I try to spoof the macaddress via

'ifconfig eth0 hw ether 00:0E:3D:10:01:C8' , everything blocks. Also, when I alter the /etc/network/interfaces file with this mac-address, the device is unable to complete boot

[KrishnaPavan]

What is the bootloader that you are using?

U-boot/Redboot?

Also tell me the procedure, i mean the initial steps that you followed to give the commands in the respective shell.

[woutervh]

No, I can't, and if I want to spoof it via ifconfig, everything blocks

Krishna Pavan said:

Probably you can set the property from the shell

Check your environment variables and then set the parameter

[KrishnaPavan]

Probably you can set the property from the shell

Check your environment variables and then set the parameter