Date: Mon, 26 Aug 2002 16:00:41 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Mikko =?iso-8859-1?Q?Ty=F6l=E4j=E4rvi?= <mikko@dynas.se> Cc: John Nielsen <john@jnielsen.net>, Marco Molteni <molter@tin.it>, freebsd-hackers@freebsd.org Subject: Re: USB support for new HP printers? Message-ID: <3D6AB319.791060CF@mindspring.com> References: <20020826082508.X356-100000@atlas.home>
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Mikko Työläjärvi wrote:
> > I'm pretty sure that bidirectional I/O is supported, or there
> > would be no network devices.
>
> [...]
>
> Though the USB stack handles bi-directional communication, ulpt does not:
>
> Static struct cdevsw ulpt_cdevsw = {
> /* open */ ulptopen,
> /* close */ ulptclose,
> /* read */ noread, <---- !
> ...
>
> In -current, an input routine has been added, but all it does is
> discard any data that comes from the printer.
That should be trivial to correct, for anyone who wants to use
their printer, and requires bidirecitonal I/O...
But I stand corrected.
-- Terry
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