Re: [PATCH 001/001] INPUT: new ioctl's to retrieve values of EV_REP and EV_SND event codes

Dmitry Torokhov
2006-04-26T05:06:42Z

On Tuesday 25 April 2006 11:26, Vojtech Pavlik wrote:
> On Tue, Apr 25, 2006 at 11:23:02AM -0400, Dmitry Torokhov wrote:
> > On 4/25/06, Vojtech Pavlik <vojtech@suse.cz> wrote:
> > > On Tue, Apr 25, 2006 at 09:19:42AM -0400, Dmitry Torokhov wrote:
> > > > On 4/24/06, Dmitry Torokhov <dmitry.torokhov@gmail.com> wrote:
> > > > > On 4/24/06, Vojtech Pavlik <vojtech@suse.cz> wrote:
> > > > > > On Mon, Apr 24, 2006 at 10:31:39AM -0400, Dmitry Torokhov wrote:
> > > > > > >
> > > > > > > Vojtech, could you remind me why EVIOC{G|S}REP were removed? Some
> > > > > > > people want to have ability to separate keyboards (via grabbing); they
> > > > > > > also might want to control repeat rate independently. Shoudl we
> > > > > > > reinstate these ioctls?
> > > > > >
> > > > > > I believe they were replaced by the ability to send EV_REP style events
> > > > > > to the device, setting the repeat rate.
> > > > > >
> > > > >
> > > > > Argh, why am I always forgetting about ability to write events into devices?
> > > >
> > > > Thinking about it some more - writing to the event device is an
> > > > elegant way to set repeat rate but how do you retrieve current repeat
> > > > rate for a given device?
> > >
> > > You can't. And that's likely a problem that needs fixing.
> > >
> >
> > So do you agree that we need to ressurect EVIOCGREP (and EVIOCSREP
> > just to complement the interface)?
>
> Yes. And EVIOCSREP should just generate the events needed to notify the
> drivers to do the change.
>

What do you gius think about the patch below?

--
Dmitry

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

drivers/input/evdev.c | 21 +++++++++++++++++++++
include/linux/input.h | 2 ++
2 files changed, 23 insertions(+)

Index: work/drivers/input/evdev.c
===================================================================
--- work.orig/drivers/input/evdev.c
+++ work/drivers/input/evdev.c
@@ -403,6 +403,27 @@ static long evdev_ioctl_handler(struct f
case EVIOCGID:
if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
return -EFAULT;
+ return 0;
+
+ case EVIOCGREP:
+ if (!test_bit(EV_REP, dev->evbit))
+ return -ENOSYS;
+ if (put_user(dev->rep[REP_DELAY], ip))
+ return -EFAULT;
+ if (put_user(dev->rep[REP_PERIOD], ip + 1))
+ return -EFAULT;
+ return 0;
+
+ case EVIOCSREP:
+ if (!test_bit(EV_REP, dev->evbit))
+ return -ENOSYS;
+ if (get_user(u, ip))
+ return -EFAULT;
+ if (get_user(v, ip + 1))
+ return -EFAULT;
+
+ input_event(dev, EV_REP, REP_DELAY, u);
+ input_event(dev, EV_REP, REP_PERIOD, v);

return 0;

Index: work/include/linux/input.h
===================================================================
--- work.orig/include/linux/input.h
+++ work/include/linux/input.h
@@ -56,6 +56,8 @@ struct input_absinfo {

#define EVIOCGVERSION _IOR('E', 0x01, int) /* get driver version */
#define EVIOCGID _IOR('E', 0x02, struct input_id) /* get device ID */
+#define EVIOCGREP _IOR('E', 0x03, int[2]) /* get repeat settings */
+#define EVIOCSREP _IOW('E', 0x03, int[2]) /* get repeat settings */
#define EVIOCGKEYCODE _IOR('E', 0x04, int[2]) /* get keycode */
#define EVIOCSKEYCODE _IOW('E', 0x04, int[2]) /* set keycode */