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authorRafi Rubin <rafi@seas.upenn.edu>2010-03-10 16:10:28 +0100
committerJiri Kosina <jkosina@suse.cz>2010-03-10 16:10:28 +0100
commit2886539d5e649c22a6d2107eb431d3bee81e0e6d (patch)
tree3c552a2f31654171553a55bf2db45ec468b7c5d1 /drivers/hid/hid-ntrig.c
parenteff7f270e9a05688066f40589d7b44e1dcf335dc (diff)
downloadlinux-2.6.38-lt-ux500-2886539d5e649c22a6d2107eb431d3bee81e0e6d.tar.gz
HID: ntrig: fix touch events
This reinstates the lost unpressing of BTN_TOUCH. To prevent undesireably touch toggles this also deals with tip switch events. Added a trap to prevent going out of bounds for hidinputs with empty reports. Clear bits of unused buttons which result in misidentification. Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-ntrig.c')
-rw-r--r--drivers/hid/hid-ntrig.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
index 3234c729a89..edcc0c4247b 100644
--- a/drivers/hid/hid-ntrig.c
+++ b/drivers/hid/hid-ntrig.c
@@ -140,6 +140,9 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
nd->reading_mt = 1;
nd->first_contact_confidence = 0;
break;
+ case HID_DG_TIPSWITCH:
+ /* Prevent emission of touch until validated */
+ return 1;
case HID_DG_CONFIDENCE:
nd->confidence = value;
break;
@@ -259,6 +262,7 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
BTN_TOOL_TRIPLETAP, 0);
input_report_key(input,
BTN_TOOL_QUADTAP, 0);
+ input_report_key(input, BTN_TOUCH, 0);
}
break;
@@ -308,13 +312,20 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
list_for_each_entry(hidinput, &hdev->inputs, list) {
+ if (hidinput->report->maxfield < 1)
+ continue;
+
input = hidinput->input;
switch (hidinput->report->field[0]->application) {
case HID_DG_PEN:
input->name = "N-Trig Pen";
break;
case HID_DG_TOUCHSCREEN:
+ /* These keys are redundant for fingers, clear them
+ * to prevent incorrect identification */
__clear_bit(BTN_TOOL_PEN, input->keybit);
+ __clear_bit(BTN_TOOL_FINGER, input->keybit);
+ __clear_bit(BTN_0, input->keybit);
/*
* A little something special to enable
* two and three finger taps.