strange ucom (uplcom) error

[Michal Mertl]

Emanuel Strobl wrote:
> Am Dienstag, 18. Januar 2005 16:17 schrieb Andrew L. Neporada:
> > On Tue, Jan 18, 2005 at 01:06:43PM +0100, Emanuel Strobl wrote:
> > > Dear experts,
> > >
> > > I have two USB-RS232 Adaptors, both with PL2303 chipset. One is working
> > > the other one not (I hate to say it but both are working under win).
> > >
> > > The not working (more expensive) one gets recognized as ucom0 and I have
> > > ucom0, also I can receive signal but not transmit.
> >
> > [skip]
> >
> > Take a look at http://gate.intercaf.ru/~lesha/6100/ and try patch
> > http://gate.intercaf.ru/~lesha/6100/pl2303x.patch
> >
> > It can break old (working) PL2303 chip, but it works for me with newer
> 
> Thanks a lot, this indeed fixes the revision 3.0 adaptor but unfortunately 
> also breakes the 2.02 version :(
> 
> Perhaps there's a goog guy out there who can refurbish the uplcom driver with 
> this information (akiyama?)?
> 
> Thanks a lot,

I've just recently been looking into this too. I used the mentioned
patch and also linux driver source and have come with the attached
patch. It contains one more change but I don't know if it's correct. It
works for both chips on CURRENT for serial console.

The author of the patch mentions it isn't binary safe - sometimes the
chip stops working. I planned to test it with binary transfers (ppp)
today, check if it's working and submit it (with some cleanup) for
inclusion in FreeBSD.

Michal Mertl
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