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Linux: TI8168 MUSB problem

Tool/software: Linux

  1.Two USB interface are export on my board, one connect USB-HUB, other connect USB device(mouse/u-disk etc).
and runing with DVRRDK_04.01.00.02。 all usb work error.
  2.kernel runing later, some error like next, or no found any usb device.( two USB interface ocurs error)。
usb 2-1: new high speed USB device using musb-hdrc and address 88
hub 2-0:1.0: unable to enumerate USB device on port 1
3.just so no usb device found,  this usb interface run fine.  shell run "lssb", get next:(on this time, check usb vbus power,
it's low, means not poweron).
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
4. debug it long time.   we found  when system runing and reset/reboot it( not poweroff) later, the two usb interface are
    run success. how we fix it?

5. we compile kernel with musb by module, then insmod ->rmmod ->insmod this module. two usb still error.