From: john slee <indigoid@higherplane.net>
To: "Dmitry A. Fedorov" <D.A.Fedorov@inp.nsk.su>
Cc: Balbir Singh <balbir_soni@yahoo.com>, linux-kernel@vger.kernel.org
Subject: Re: Is it useful to support user level drivers
Date: Thu, 21 Jun 2001 23:50:25 +1000 [thread overview]
Message-ID: <20010621235025.J30872@higherplane.net> (raw)
In-Reply-To: <Pine.SGI.4.10.10106211833390.3193032-100000@Sky.inp.nsk.su>
On Thu, Jun 21, 2001 at 06:38:09PM +0700, Dmitry A. Fedorov wrote:
> kernel module to delivery hardware interrupts to user space
> programs. Hardware interrupts (IRQ) are accessible by
> character devices /dev/irq[0-15]. Interrupts delivered by
> signals and select(2)/poll(2)
i believe libgpio uses the existing usb/iee1394/serial/parallel
interfaces to provide a limited userspace driver capability. gphoto2
uses this to support a LOT of digital cameras entirely in userspace...
obviously this concept isn't covering everything but it sure covers a
lot of bases. also depends on what you understand a "driver" to be...
from a "common user"'s perspective it just means "it makes my WinWidget
work!"
it's similar to what you describe above in that there's a kernel
interface, but it's more specific than /dev/irq5. this is good in that
you don't want a different usb driver for every userspace usb device
driver...
http://sourceforge.net/projects/gphoto/ (i think)
j.
--
"Bobby, jiggle Grandpa's rat so it looks alive, please" -- gary larson
next prev parent reply other threads:[~2001-06-21 13:34 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-21 10:41 Is it useful to support user level drivers Balbir Singh
2001-06-21 10:55 ` Tim Waugh
2001-06-21 11:04 ` Alan Cox
2001-06-21 12:43 ` Balbir Singh
2001-06-21 13:27 ` Alan Cox
2001-06-28 22:52 ` Pavel Machek
2001-06-21 12:45 ` Dmitry A. Fedorov
2001-06-21 13:24 ` Oliver Neukum
2001-06-21 14:46 ` Dmitry A. Fedorov
2001-06-21 15:19 ` Oliver Neukum
2001-06-22 4:19 ` Dmitry A. Fedorov
2001-06-22 7:28 ` Balbir Singh
2001-06-21 16:34 ` Abramo Bagnara
2001-06-21 17:27 ` Alan Cox
2001-06-21 19:59 ` Abramo Bagnara
2001-06-21 20:40 ` Richard B. Johnson
2001-06-21 20:54 ` Abramo Bagnara
2001-06-21 21:09 ` Oliver Neukum
2001-06-28 22:57 ` Pavel Machek
2001-06-21 13:28 ` Alan Cox
2001-06-21 14:03 ` Matthias Urlichs
2001-06-28 22:54 ` Pavel Machek
2001-06-21 14:20 ` Dmitry A. Fedorov
2001-06-21 11:38 ` Dmitry A. Fedorov
2001-06-21 13:50 ` john slee [this message]
2001-06-21 13:58 ` Matthias Urlichs
2001-06-21 14:21 ` john slee
2001-06-28 22:51 ` Pavel Machek
[not found] <mailman.993156181.18994.linux-kernel2news@redhat.com>
2001-06-21 22:06 ` Pete Zaitcev
2001-06-21 22:20 ` David S. Miller
2001-06-21 23:09 ` Mike Mackovitch
2001-06-21 23:22 ` David S. Miller
2001-06-21 23:50 ` Mike Mackovitch
2001-06-22 0:36 ` David S. Miller
2001-06-21 23:40 ` Richard B. Johnson
2001-06-22 0:30 ` Anders Larsen
2001-06-22 0:43 ` Richard B. Johnson
2001-06-25 0:06 ` Anders Larsen
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