My previous mail seems to have been truncated.
It contained USB log.
But now I have a clue to solve my hub problem.
It's a shame that my firmware did not care for SUSPEND.
It did not put EZ-USB into low power consumption mode on the bus
inactivity
then the USB hub seems to have done a correct job to disconnect this
bad boy.
I plan to use this device to control my home communication system so
that
I do not want to put it into sleep.
Eventually, I should run this device by self-power and also implement
the remote wake-up.
I have a USB-Serial adaptor that uses Apple's CDC driver. It works fine
with USB hubs.
I checked its device descriptor to found that it declares itself as
self-powered,
although it depends on the bus power.
I tried this deception for my own device and it worked with hub.
This provisionally solves my problem.
I thank all of you who considered my problem, especially Barry Twycross.
---
Hiroshi TOMARU
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