From: Timur Tabi <timur@freescale.com>
To: gregkh <gregkh@suse.de>, lkml <linux-kernel@vger.kernel.org>
Subject: Writing a console/tty driver -- how to use tty_port?
Date: Wed, 27 Oct 2010 16:04:13 -0500 [thread overview]
Message-ID: <4CC893CD.7020701@freescale.com> (raw)
Greg,
Do you have an updated version of Tiny TTY that uses tty_port structures? I'm
trying to write a new TTY driver for a device that is not a UART, and I'm having
a hard time finding a good example. I suspect I need to understand the tty_port
structure, but I can't find any documentation for it.
One specific problem I'm having is that I can't figure out how to get a
tty_struct pointer in my interrupt handler. The ISR gets called whenever there
is new input, and it needs to call tty_insert_flip_string(). But it appears
that it's possible to have my driver opened multiple times, each time creating a
new TTY. But since I can only have one interrupt handler, I don't know how to
determine which of the tty_structs to use. I figure tty_port is a way to
resolve this problem, but I don't know how to use it exactly.
--
Timur Tabi
Linux kernel developer at Freescale
next reply other threads:[~2010-10-27 21:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-27 21:04 Timur Tabi [this message]
2010-10-27 22:19 ` Writing a console/tty driver -- how to use tty_port? Alan Cox
2010-10-28 19:35 ` Timur Tabi
2010-10-29 13:55 ` Timur Tabi
2010-10-29 14:14 ` Timur Tabi
2010-10-28 20:34 ` Timur Tabi
2010-10-28 20:47 ` Timur Tabi
2010-10-28 20:57 ` Arnd Bergmann
2010-10-28 21:08 ` Timur Tabi
2010-10-29 14:21 ` Arnd Bergmann
2010-10-28 22:11 ` Alan Cox
2010-10-29 23:55 ` Arnd Bergmann
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