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Problem on accessing USB device.

David Allen
Intellectual 685 points

Hello everyone!

I'm working on OMAPL137 evm.Now I met a problem with the use of USB.

When I plug a USB storage device into USB1.1 on evm, it displayed as below:

Only if I press any key can it return to console and is this display info correct?

Also I check  /proc/bus/device, the info displayed seems normal:

But when check /proc/partitions, the document was empty:  

How to solve the problem, I need help. Thanks!

  • 0
    TI__Genius 9460 points

    David,

    the displayed information is correct. As you inserted the storage device to USB1 port which is full speed OHCI host (USB1.1 standard) so it can work only in full speed mode and so it print that device is not running at top speed. You can use USB0 port which is USB2.0 standard and  can run at high speed.

    Ajay

  • 0 in reply to Ajay
    Intellectual 685 points

    Thanks very much, Ajay.

    I forgot to mention that when plugged into USB0 the result was similar.The partitions still didn't display USB devices message when plugged.

    Now I reconpile the kernel, and the error meaasge changed:

    I reconfirmed  that I had select scsi module when take menuconfig.

    Sorry to ask so long, while I'm still confused by this prolem and failed to acess USB storage.

    Best regards. 

  • 0 in reply to Ajay
    Intellectual 685 points

    After I modified the da830_omapl137_defconfig(I use this config and didnot use menuconfig) and compiled the kernel, the result was different:

    I'm glad to see "scsi1 : SCSI emulation for USB Mass Storage devices", but some errors still exists.

    Usb-storage module is correct but usbcore fails instead. Now the USB-storage cannot be acessed yet.

    The configure docunment is uploaded. Could you please help to rectify it?

    Regards.

    0412.da830_omapl137_defconfig.txt

     

  • 0 in reply to David Allen
    TI__Genius 9460 points

    You should enabled SCSI support (disk and generic) at drivers->SCSI. Additionally USB mass storage class at drivers->USB support->Mass storgae

    Ajay