Hi Dmitry,
Em Sun, 28 Jul 2013 21:53:58 -0700
Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> escreveu:
> Hi Mauro,
>
> On Mon, Jul 29, 2013 at 12:59:37AM -0300, Mauro Carvalho Chehab wrote:
> > Samsung notebooks have a FN LOCK key. It works like CAPS LOCK or NUM
> > LOCK keys.
> >
> > When FN LOCK key is pressed, any further press to a key with a blue label
> > on it (Fn keys) will produce the alternate code.
> >
> > Another press makes the keyboard to return to its normal state.
> >
> > On the notebooks where such feature were found, a FN LOCK on event
> > produces scancode 0xa8, and a FN LOCK off event produces scancode 0xa9.
> >
> > Yet, it is better to reserve some space at the keymap to allow some
> > different implementation of this feature where the same keycode might
> > be used.
> >
> > Also, as this is actually a switch, add a switch indicator to report
> > when this switch is set/reset.
> >
> > Signed-off-by: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx>
> > ---
> > include/uapi/linux/input.h | 5 +++++
> > 1 file changed, 5 insertions(+)
> >
> > diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
> > index d584047..4622c34 100644
> > --- a/include/uapi/linux/input.h
> > +++ b/include/uapi/linux/input.h
> > @@ -716,6 +716,10 @@ struct input_keymap_entry {
> > #define BTN_DPAD_LEFT 0x222
> > #define BTN_DPAD_RIGHT 0x223
> >
> > +#define KEY_FNLOCK_TOGGLE 0x224 /* Request switch Fn on or off */
> > +#define KEY_FNLOCK_ON 0x225
> > +#define KEY_FNLOCK_OFF 0x226
> > +
> > #define BTN_TRIGGER_HAPPY 0x2c0
> > #define BTN_TRIGGER_HAPPY1 0x2c0
> > #define BTN_TRIGGER_HAPPY2 0x2c1
> > @@ -853,6 +857,7 @@ struct input_keymap_entry {
> > #define SW_FRONT_PROXIMITY 0x0b /* set = front proximity sensor active */
> > #define SW_ROTATE_LOCK 0x0c /* set = rotate locked/disabled */
> > #define SW_LINEIN_INSERT 0x0d /* set = inserted */
> > +#define SW_FNLOCK 0x0e /* set = Fn locked */
>
> I am not sure if we need both the keys and the switch, so I would
> probably simply go with the keys, and not bother with switch. Then we do
> not need to touch the atkbd driver at all and rely on udev to set up the
> keymap and force release keys.
The hole idea of doing those patches is to have an userspace tool that will
be able to show software LEDs, like mate-applet-lockeys, that will query
the input driver to know the current status. So, the better is to keep
control of it as soon as kernel starts controlling the Keyboard, as,
otherwise, the software LED indicators may be wrong.
If you think that having both keycodes and a switch is an overkill, then
the better is to just keep the switch.
--
Cheers,
Mauro
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