From: Henrik Rydberg 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 Signed-off-by: Andrew Morton --- 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; _