From: Henrik Rydberg <rydberg@xxxxxxxxxxx>
The tap functionality of mousedev does not distinguish between a tap
(on/off localized in time and space) and a quick move (on/off localized in
time only). This patch improves the tap detection by testing also for
space locality.
Signed-off-by: Henrik Rydberg <rydberg@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/input/mousedev.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff -puN drivers/input/mousedev.c~input-mousedev-distinguish-a-moving-finger-from-a-tapping-finger drivers/input/mousedev.c
--- a/drivers/input/mousedev.c~input-mousedev-distinguish-a-moving-finger-from-a-tapping-finger
+++ a/drivers/input/mousedev.c
@@ -49,6 +49,10 @@ static unsigned tap_time = 200;
module_param(tap_time, uint, 0644);
MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)");
+static unsigned tap_move = 20;
+module_param(tap_move, uint, 0644);
+MODULE_PARM_DESC(tap_move, "Tap distance for touchpads in absolute mode (res)");
+
struct mousedev_hw_data {
int dx, dy, dz;
int x, y;
@@ -76,6 +80,7 @@ struct mousedev {
int old_x[4], old_y[4];
int frac_dx, frac_dy;
unsigned long touch;
+ int touch_dx, touch_dy;
};
enum mousedev_emul {
@@ -143,6 +148,7 @@ static void mousedev_touchpad_event(stru
tmp = ((value - fx(2)) * 256 * FRACTION_DENOM) / size;
tmp += mousedev->frac_dx;
mousedev->packet.dx = tmp / FRACTION_DENOM;
+ mousedev->touch_dx += mousedev->packet.dx;
mousedev->frac_dx =
tmp - mousedev->packet.dx * FRACTION_DENOM;
}
@@ -158,6 +164,7 @@ static void mousedev_touchpad_event(stru
tmp = -((value - fy(2)) * 256 * FRACTION_DENOM) / size;
tmp += mousedev->frac_dy;
mousedev->packet.dy = tmp / FRACTION_DENOM;
+ mousedev->touch_dy += mousedev->packet.dy;
mousedev->frac_dy = tmp -
mousedev->packet.dy * FRACTION_DENOM;
}
@@ -320,6 +327,8 @@ static void mousedev_touchpad_touch(stru
{
if (!value) {
if (mousedev->touch &&
+ abs(mousedev->touch_dx) < tap_move &&
+ abs(mousedev->touch_dy) < tap_move &&
time_before(jiffies,
mousedev->touch + msecs_to_jiffies(tap_time))) {
/*
@@ -336,6 +345,7 @@ static void mousedev_touchpad_touch(stru
clear_bit(0, &mousedev_mix->packet.buttons);
}
mousedev->touch = mousedev->pkt_count = 0;
+ mousedev->touch_dx = mousedev->touch_dy = 0;
mousedev->frac_dx = 0;
mousedev->frac_dy = 0;
_
--
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