From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Grant Edwards <grant.b.edwards@gmail.com>
Cc: linux-serial@vger.kernel.org
Subject: Re: New serial card development
Date: Tue, 23 Oct 2012 20:24:04 +0100 [thread overview]
Message-ID: <20121023202404.7e916cca@pyramind.ukuu.org.uk> (raw)
In-Reply-To: <k66okv$811$1@ger.gmane.org>
> FWIW, in some products we're planning that will require support for
> various industrial serial protocols, I'm leaning towards abandoning
> the tty driver approach and writing a stand-alone character device
> driver. The byte-stream oriented tty/line-discipline layer just
> doesn't fit well when dealing with frame-oriented industrial protocols
> that depend on things like 9th bit addressing and detecting
> sub-millisecond inter-byte timeouts. When I add in the lack of
> long-term stability in the tty API it seems like it might not be such
> a bad idea to give up trying to make the tty abstraction fit a use
> case that's just nothing like a teletype.
Not unreasonable but we do need to cover it to some extent because there
are a lot of 'multi-use' port types where you need to share the hardware
or switch modes.
Although we don't use it that way its not entirely accidental that the
tty buffer code supports chains of buffers with lengths 8)
Alan
next prev parent reply other threads:[~2012-10-23 19:18 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-09 18:43 New serial card development Matt Schulte
2012-10-14 9:37 ` Theodore Ts'o
2012-10-15 19:08 ` Matt Schulte
2012-10-15 23:26 ` Alan Cox
2012-10-16 2:32 ` Theodore Ts'o
2012-10-17 20:24 ` Matt Schulte
2012-10-19 21:21 ` Theodore Ts'o
2012-10-23 16:27 ` Matt Schulte
2012-10-23 16:31 ` Matt Schulte
2012-10-23 18:38 ` Greg KH
2012-10-29 20:04 ` Matt Schulte
2012-10-31 21:55 ` Matt Schulte
2012-11-01 22:03 ` Matt Schulte
2012-11-01 22:26 ` Alan Cox
2012-11-02 18:47 ` Matt Schulte
2012-11-02 20:21 ` Alan Cox
2012-10-23 18:06 ` Grant Edwards
2012-10-23 18:26 ` Alan Cox
2012-10-23 18:45 ` Grant Edwards
2012-10-23 19:16 ` Greg KH
2012-10-23 19:42 ` Grant Edwards
2012-10-23 20:10 ` Greg KH
2012-10-23 19:24 ` Alan Cox [this message]
2012-10-23 19:48 ` Grant Edwards
2012-10-23 20:31 ` Theodore Ts'o
2012-10-23 20:41 ` Grant Edwards
[not found] ` <CAJp1Oe6k7NWqdbYkJnd787JiT55-wSbG+tX1tP7Cy-oPShdVaA@mail.gmail.com>
2012-10-17 20:23 ` Matt Schulte
2012-10-17 21:53 ` Alan Cox
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20121023202404.7e916cca@pyramind.ukuu.org.uk \
--to=alan@lxorguk.ukuu.org.uk \
--cc=grant.b.edwards@gmail.com \
--cc=linux-serial@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.