Samsung keyboards have a key called FN LOCK. This key acts like
CAPS LOCK and NUM LOCK. When pressed, the keyboard switches to a state
where the produced scancode are the blue ones (the Fn keycodes).
Add support for it at atkbd.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx>
---
drivers/input/keyboard/atkbd.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/input/keyboard/atkbd.c b/drivers/input/keyboard/atkbd.c
index 298ac1d..7f88132 100644
--- a/drivers/input/keyboard/atkbd.c
+++ b/drivers/input/keyboard/atkbd.c
@@ -218,6 +218,7 @@ struct atkbd {
bool softraw;
bool scroll;
bool enabled;
+ bool fnlock_set;
/* Accessed only from interrupt */
unsigned char emul;
@@ -453,6 +454,28 @@ static irqreturn_t atkbd_interrupt(struct serio *serio, unsigned char data,
if (keycode != ATKBD_KEY_NULL)
input_event(dev, EV_MSC, MSC_SCAN, code);
+ /*
+ * Handles special Fn Lock switch.
+ *
+ * This switch can't be merged with the next one, as we also want
+ * to report those keycodes to userspace, via input_event, and
+ * call input_sync().
+ */
+ switch (keycode) {
+ case KEY_FNLOCK_OFF:
+ atkbd->fnlock_set = false;
+ input_report_switch(dev, SW_FNLOCK, atkbd->fnlock_set);
+ break;
+ case KEY_FNLOCK_ON:
+ atkbd->fnlock_set = true;
+ input_report_switch(dev, SW_FNLOCK, atkbd->fnlock_set);
+ break;
+ case KEY_FNLOCK_TOGGLE:
+ atkbd->fnlock_set = !atkbd->fnlock_set;
+ input_report_switch(dev, SW_FNLOCK, atkbd->fnlock_set);
+ break;
+ }
+
switch (keycode) {
case ATKBD_KEY_NULL:
break;
@@ -1126,6 +1149,10 @@ static void atkbd_set_device_attrs(struct atkbd *atkbd)
__set_bit(atkbd->keycode[i], input_dev->keybit);
}
}
+
+ /* FIXME: Unconditionqally sets FN LOCK switch */
+ __set_bit(SW_FNLOCK, atkbd->dev->swbit);
+ input_dev->evbit[0] |= BIT_MASK(EV_SW);
}
/*
--
1.8.3.1
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