USB ppbus?

[Hans Petter Selasky]

On 12/19/16 20:19, George Mitchell wrote:
> I have a USB cable that terminates in a DB25 connector.  Inside is a
> Prolific Technology PL2305:
> http://prolificusa.com/files/ds_pl2305I_v1.0.pdf
> It probes as a ulpt.  I would love if there existed such a thing as
> a uppi device.  Does it sound possible to get to such a result by
> extending the ppbus code to know about USB?  Or might it be simpler
> to try to add the ppi ioctls (PPIGDATA, etc.) to ulpt.c?   -- George

Hi George,

There is currently no such thing. ulpt only provides a raw character 
device. The ppbus could possibly be implemented in userspace using libcuse.

--HPS