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| author | Benjamin Tissoires <benjamin.tissoires@gmail.com> | 2012-11-14 16:59:19 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2012-11-15 10:09:12 +0100 |
| commit | 349fd6705b13946c04794bf27d67282940aa46b8 (patch) | |
| tree | 45a7012eb24f99b589418c9cf4e4a1c581c4549e /drivers/hid | |
| parent | afbcb04c181f36634f4af207bb0c9cc46b7405e4 (diff) | |
| download | linux-349fd6705b13946c04794bf27d67282940aa46b8.tar.gz linux-349fd6705b13946c04794bf27d67282940aa46b8.tar.bz2 linux-349fd6705b13946c04794bf27d67282940aa46b8.zip | |
HID: multitouch: support T and C for win8 devices
Win8 input specification clarifies the X and Y sent by devices.
It distincts the position where the user wants to Touch (T) from
the center of the ellipsoide (C). This patch enable supports for this
distinction in hid-multitouch.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-multitouch.c | 46 |
1 files changed, 37 insertions, 9 deletions
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 9c7415ff4aaf..a2963b238fde 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -54,7 +54,7 @@ MODULE_LICENSE("GPL"); #define MT_QUIRK_NO_AREA (1 << 9) struct mt_slot { - __s32 x, y, p, w, h; + __s32 x, y, cx, cy, p, w, h; __s32 contactid; /* the device ContactID assigned to this slot */ bool touch_state; /* is the touch valid? */ }; @@ -322,6 +322,7 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, struct mt_device *td = hid_get_drvdata(hdev); struct mt_class *cls = &td->mtclass; int code; + struct hid_usage *prev_usage = NULL; /* Only map fields from TouchScreen or TouchPad collections. * We need to ignore fields that belong to other collections @@ -344,23 +345,42 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, if (field->physical == HID_DG_STYLUS) return -1; + if (usage->usage_index) + prev_usage = &field->usage[usage->usage_index - 1]; + switch (usage->hid & HID_USAGE_PAGE) { case HID_UP_GENDESK: switch (usage->hid) { case HID_GD_X: - hid_map_usage(hi, usage, bit, max, + if (prev_usage && (prev_usage->hid == usage->hid)) { + hid_map_usage(hi, usage, bit, max, + EV_ABS, ABS_MT_TOOL_X); + set_abs(hi->input, ABS_MT_TOOL_X, field, + cls->sn_move); + } else { + hid_map_usage(hi, usage, bit, max, EV_ABS, ABS_MT_POSITION_X); - set_abs(hi->input, ABS_MT_POSITION_X, field, - cls->sn_move); + set_abs(hi->input, ABS_MT_POSITION_X, field, + cls->sn_move); + } + mt_store_field(usage, td, hi); td->last_field_index = field->index; return 1; case HID_GD_Y: - hid_map_usage(hi, usage, bit, max, + if (prev_usage && (prev_usage->hid == usage->hid)) { + hid_map_usage(hi, usage, bit, max, + EV_ABS, ABS_MT_TOOL_Y); + set_abs(hi->input, ABS_MT_TOOL_Y, field, + cls->sn_move); + } else { + hid_map_usage(hi, usage, bit, max, EV_ABS, ABS_MT_POSITION_Y); - set_abs(hi->input, ABS_MT_POSITION_Y, field, - cls->sn_move); + set_abs(hi->input, ABS_MT_POSITION_Y, field, + cls->sn_move); + } + mt_store_field(usage, td, hi); td->last_field_index = field->index; return 1; @@ -501,6 +521,8 @@ static void mt_complete_slot(struct mt_device *td, struct input_dev *input) input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x); input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y); + input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx); + input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy); input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide); input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p); input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major); @@ -552,10 +574,16 @@ static int mt_event(struct hid_device *hid, struct hid_field *field, td->curdata.p = value; break; case HID_GD_X: - td->curdata.x = value; + if (usage->code == ABS_MT_TOOL_X) + td->curdata.cx = value; + else + td->curdata.x = value; break; case HID_GD_Y: - td->curdata.y = value; + if (usage->code == ABS_MT_TOOL_Y) + td->curdata.cy = value; + else + td->curdata.y = value; break; case HID_DG_WIDTH: td->curdata.w = value; |