> I have gone through the document "USB programming guide for linux".
> The document does not say anything about vendor specific requests to
> be made to the device. Are they made in the same way as the normal requests?
> The explanantion given there is also not very extensive.
> Can anyone suggest some other references.

See the USB 2.0 specification.  Basically vendor control
requests are just like standard ones, except some of the
bits in the setup packet are different.

Also, look at the kerneldoc in the latest 2.5 tree -- many
more of the functions and structures have documentation,
and it's more current than that programming guide.  (Not
that it talks about vendor requests ... :)

- Dave



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