usb gadget driver "NCM" for DM8148 --- need help

Hello,

Does ping work fine or not? Please, can you try this without the patch, so you can be sure the everything else in your setup is correct.

BR

Vladimir

Hi Vladimir:

     thank you for your reply.

     ping from PC to DM8148 works, but ping form DM8148 to PC does not work.

     without my patch, i compiled ethernet gadget for test, ping from both side works well for about 1 minute, after that the network connection will lose automatically. then PC need to up usb0 again. this seems the same as using my patch.

     can you please review my patch and see whether i set correct configuration in ti8148_evm_defconfig?

Best Regards

Hello,

I cannot determine is your patch correct or not. But what I can tell is that is the Ethernet USB gadget woks. I tried it myself many times. If on your side it fails after a minute, you have to review your setup before you proceed. Do you have any progress now?

BR

Vladimir

Hi Vladimir:

      thank you for your reply.

      1. i download the whole packet of EZSDK, and then install.

       2. i modified the kernel configuration file to enable USB gadget for EZSDK, but i did not change any source code of kernel.

      3. i built-in g_ether to kernel, and test with different kind of PC, the network connection on PC will lose.

      4. the PC i test are: Ubuntu 11.04, with kernel version 2.6.38-8-generic.

                                          ubuntu 12.04.1, with kernel version 3.2.0-29-generic

                                          fedora with kernel version 3.5.5-1.fc17.×86_64

       you said it works on your side? which EZSDK version did you test? which PC did you use for test?

       can you please upload your .config file? this is the only file i changed for this test.

Best Regards

Hello, Yitian

It was EZSDK 5.04 with Ubuntu 10.04, but actually I tested this on the DM816x EVM, so potentially there could be a problem here. Sorry I didn't mention that at first. I will try it  and I'll tell you know the result. I doubt that it is because of the configuration, if it was wrong it would be unlikely to progress that far.

BR

Vladimir

Hello Vladimir:

     thank you very much for your help.

     today i did more test on DM8148EVM, i use two DM8148EVM boards, one board use the default EZSDK without any change, which means this board is USB host. and the other board configured to be USB gadget. these two boards can ping each other well. i test more than 30 minutes and the network connection is stable.

     but when i configured the DM8148EVM to be USB gadget and connected with Ubuntu PC( version 11.04), the network connection will lose within 1 minute.

     i am waiting for your test result. thanks again.

Best Regards

Yitian,

Now, with Ubuntu 10.04 LTS, EZSDK 5.05, DM814x EVM, USB Ethernet gadget built-in, there is no disconnect for more then 30 minutes. No disconnect with EZSDK 5.05 on DM816x EVM also.

BR

Vladimir

OK, so maybe it is something with Ubuntu 11.04. Just to clarify: Is the 1 min disconnect appear on Ubuntu 12.04? On 10.04 LTS I have no problems.

BR

Vladimir

If it is working with 12.04 or if you have 10.04 on your disposal, you can test your patch this way and to tell me the result now. Thank you.

BR

Vladimir

Hello Vladimir:

    thank you for your test, i will test EZSDK 5.05 with Ubuntu 10.04.

    by the way, could you please also test the EZSDK 5.04 with Ubuntu 11.04 if you these environment on your hand?

    i tested Ubuntu 11.04 and 12.04, both of them has the disconnect issue. and the  fedora with kernel version 3.5.5-1.fc17.×86_64 also cannot work well.

Best Regards

I have tried the scenario 10.04 LTS, EZSDK 5.04, DM816x EVM, USB Ethernet gadget built-in in the past and there was no disconnects.

Vladimir

Hello, Yitian

What happened? Do you have any success? Thank you.

BR

Vladimir