Hello

I have an M-Audio (Fast Track Pro) USB device and I'd like to improve  
the usb driver to support this device.

The problem I'd like to ask the usb-devel list for is the following:

This device has two configurations:

Config 1 (this ist chosen by default)
Is class compliant Audio interface and support standard 16-Bit Audio

Config 2
Is also class compliant (it claims to be) and has more available  
alternate settings. Thes are used for 24Bit Audio

see alsa-devel list for detailled device description
http://sourceforge.net/mailarchive/message.php?msg_id=36140571

I'd like so setup something that the configuration will automatically  
be chosen after plugin of the device.


In the linux/usb.h header it is said, thet a device driver not attempt  
to activate configurations. So my question is where is the right place  
to do this?

I think a patch for the hub.c (where the default configuration is  
chosen) would also be a bad Idea? Becaus the hub.c would make  
decisions depending on vendor and device ID.

Or is there a user space configuration to influence this decision?


Regards,

Peter Oehry

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