[Arm-netbook] allwinner USB HOST errors

[nikk gitanes]

All three tested hubs were powered by external +5V power supply + one was bus powered.

I have no troubles with 5+ devices plugged there: + HDD, TV Stick, mice etc.
They all work but in not a combination with BT USB dongles or 3G modem.

With enabled bluetooth or 3G I always have GPS device access error. But BT and 3G works in that case.
My thoughts it's related to transactions translation from OTG port in host mode to "serial"
full speed devices through external high speed bus usb hub.

Some theory founded here (USB 2.0 Hubs have "Transaction Translators" (TTs) section):

http://www.linux-usb.org/usb2.html

but it doesn't help resolve those faults...

09.05.2012, в 15:51, lkcl luke написал(а):

> On Wed, May 9, 2012 at 5:40 AM, nikk gitanes <tsynik at gmail.com> wrote:
>> Hi,
>> 
>> I'm still fighting with Allwinner USB host driver in 2.6.36 kernel.
>> 
>> Recompiled it with USB debugging messages, tried various modules options, but no luck.
>> 
>> It's used on Ainol NOVO7A tablet, running Android 2.3.4 with Allwinner 2.6.36 kernel (builded from Ainol's source).
>> 
>> The problem is:
>> 
>> With any bluetooth dongle, which switched ON, USB GPS doesn't working.
>> Or, if I boot tablet without bluetooth, GPS working, but I can't enable bluetooth instead.
> 
>  try running off of a powered USB hub
> 
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