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babble interrupt issue on ti816x platform

rakesh sasanapuri
Prodigy 110 points
Other Parts Discussed in Thread: TS3USB221

Hi,

 

             I am connecting and disconnecting USB Devices using TS3USB221/A/E  on ti816x platform, but after few a attempts ( connecting and disconnecting successfully) it is giving babble interrupt and usb port became inactive. Could any one give solution in this regard.

 

 

 

Thanks

 

Rakesh S

  • 0 in reply to MarcPyne
    Prodigy 110 points

    Hi Marc,

     

           Thanks for reply.

           Actually when we connect usb devices directly , usb devices working fine. But as we connect usb devices through MUX TS3USB221/A/E and controlling the MUX by GPIO or

    Jumpers we are facing this babble interrupt.

     

    Please find the attached log file. Please suggest any solution.

    Fullscreen 4760.log.txt Download 
    musb_h_ep0_irq 1162: no URB for end 0

CAUTION: musb1: Babble Interrupt Occured
Please issue long 
reset to make usb functional !!
usb 2-1: new low speed USB device using musb-hdrc and address 3

usb 2-1: device descriptor read/64, error -110

usb 2-1: device descriptor read/64, error -110

usb 2-1: new low speed USB device using musb-hdrc and addres
s 4

usb 2-1: device descriptor read/64, error -110

     

     

    Thanks

    Rakesh

  • 0 in reply to rakesh sasanapuri
    TI__Expert 5475 points

    Hi,

    When are you getting the babble interrupt? Before or right prior to initialization or in a middle of a transfer? If it is prior to a bus reset happening, you can ignore the babble interrupt.

    Best regards, Zegeye

  • 0 in reply to Zegeye Alemu
    Prodigy 110 points

    Hi Zegeye

     

         I am connecting the usb devices through MUX after android is UP. Then if i do switching by jumper insertion or removal , i am getting babble interrupt.

    It is not prior to bus reset.

     

     

    Thanks

     

    Rakesh

  • 0 in reply to rakesh sasanapuri
    TI__Expert 5475 points

    Hi,

    It seems ESD related issue. First place to check is your board. I think your h/w is susseptable to ESD.

    I will discuss your issue within others here and would let you know if they have a suggestion.

    Best regards, Zegeye