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PROCESSOR-SDK-AM335X: PROCESSOR-SDK-AM335X

Part Number: PROCESSOR-SDK-AM335X

Hi,

we have designed as system based on the Beaglebone Board.
We us Toshiba eMMC as system Flash memory.
Up to now we used the Toshiba 8GB THGBMHG6C1LBAIL, with that the system worked fine.

Now we upgraded to Toshiba 64GB THGBMHG9C4LBAIR, after initial boot system works fine, but after standby and wake up the eMMC flash many times is in read only mode and reports an error on the boot.

We have the Kernel V3.12 that was delivered by TI when we started development.

We enabled debugging what we are wondering is that the kernel send cmd 5 to set the Flash to sleep but for wakeup it does not send awake, there we see cmd 0 Reset and then CMD1 ask op condition.
After that some read requests are possible but when the kernel tries to write eMMC fails and is booting in read only mode.

Thanks for your support.

  • Hello and thanks for your post.

    I'm afraid v3.12 is no longer supported.

    It seems you are on the right track to compare the operation with the older eMMC to that of the new and understand the differences. You might also try contacting Toshiba to see if they have any ideas in the changes of the eMMC.

    I'm sorry I can't be of more help at this point.

  • Hi,

    are there fixes for mmc driver available from TI where we can check if applying a fix from a later release might fix the issue with the eMMC.

    Bernd
  • Bernd,

    All of our Linux development is done out in the open on various trees and you are welcome to try these various branches for fixes that might help your situation. Our main Linux repo is here:

    git.ti.com/.../ti-linux-kernel

    A good place to start might be here:

    git.ti.com/.../linux-3.12.y

    We generally continuously integrate the communitie's patches and this might have something useful for you. You can also check other branches to see what other changes have been made to the driver over time.

    I hope this helps you.
  • Bernd,

    We haven't heard any further feedback from you in a while, so I'm going to go ahead and mark this as resolved. If that is not the case, please reply back with more information. Thank you.