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HID: ntrig: TipSwitch for single touch mode touch. 

Include TipSwitch in the touch detection decision for some single touch
firmwares.  Confidence and InRange are high for all finger events
including those used to indicate the finger is no longer in contact with
the sensor.

Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
hifive-unleashed-5.1
Rafi Rubin 2010-05-03 05:08:29 -04:00 committed by Jiri Kosina
parent 5a38f2c7c4
commit 250d377522
1 changed files with 21 additions and 8 deletions
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29
drivers/hid/hid-ntrig.c
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@ -31,10 +31,12 @@ struct ntrig_data {
/* Incoming raw values for a single contact */
__u16 x, y, w, h;
__u16 id;
__u8 confidence;
bool tipswitch;
bool confidence;
bool first_contact_touch;
bool reading_mt;
__u8 first_contact_confidence;
__u8 mt_footer[4];
__u8 mt_foot_count;
@ -141,9 +143,10 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
case 0xff000001:
/* Tag indicating the start of a multitouch group */
nd->reading_mt = 1;
nd->first_contact_confidence = 0;
nd->first_contact_touch = 0;
break;
case HID_DG_TIPSWITCH:
nd->tipswitch = value;
/* Prevent emission of touch until validated */
return 1;
case HID_DG_CONFIDENCE:
@ -171,10 +174,14 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
* to emit a normal (X, Y) position
*/
if (!nd->reading_mt) {
input_report_key(input, BTN_TOOL_DOUBLETAP,
(nd->confidence != 0));
/*
* TipSwitch indicates the presence of a
* finger in single touch mode.
*/
input_report_key(input, BTN_TOUCH,
(nd->confidence != 0));
nd->tipswitch);
input_report_key(input, BTN_TOOL_DOUBLETAP,
nd->tipswitch);
input_event(input, EV_ABS, ABS_X, nd->x);
input_event(input, EV_ABS, ABS_Y, nd->y);
}
@ -213,7 +220,13 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
/* emit a normal (X, Y) for the first point only */
if (nd->id == 0) {
nd->first_contact_confidence = nd->confidence;
/*
* TipSwitch is superfluous in multitouch
* mode. The footer events tell us
* if there is a finger on the screen or
* not.
*/
nd->first_contact_touch = nd->confidence;
input_event(input, EV_ABS, ABS_X, nd->x);
input_event(input, EV_ABS, ABS_Y, nd->y);
}
@ -243,7 +256,7 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
nd->reading_mt = 0;
if (nd->first_contact_confidence) {
if (nd->first_contact_touch) {
switch (value) {
case 0: /* for single touch devices */
case 1: