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HID: wacom: generic: Send BTN_STYLUS3 when both barrel switches are set 

The Wacom Pro Pen 3D includes a third barrel switch which is intended to
be particularly useful in applications where one frequency uses pan, zoom,
and rotate to navigate around a scene or model. The pen is compatible with
the MobileStudio Pro, 2nd-gen Intuos Pro, and Cintiq Pro. When the third
button is pressed, these devices set both the HID_DG_BARRELSWITCH and
HID_DG_BARRELSWITCH2 usages since their HID descriptors do not include a
usage specific to the button.

Rather than send both BTN_STYLUS and BTN_STYLUS2 when the third button is
pressed, userspace (libinput) has requested that we detect this condition
and report a newly-defined BTN_STYLUS3 event instead. We could define a
quirk specific to devices compatible with the Pro Pen 3D, but the liklihood
of seeing both barrel switch bits set with other pens/devices is low enough
to not worry about (pens mechanically prevent accidental activation of
multiple switches).

Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Jason Gerecke 2017-11-07 08:25:17 -08:00 committed by Jiri Kosina
parent 2f84723de7
commit 9e429d5649
3 changed files with 19 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/hid/wacom_wac.c
View File

@ -2140,6 +2140,12 @@ static void wacom_wac_pen_event(struct hid_device *hdev, struct hid_field *field
case HID_DG_TIPSWITCH:
wacom_wac->hid_data.tipswitch |= value;
return;
case HID_DG_BARRELSWITCH:
wacom_wac->hid_data.barrelswitch = value;
return;
case HID_DG_BARRELSWITCH2:
wacom_wac->hid_data.barrelswitch2 = value;
return;
case HID_DG_TOOLSERIALNUMBER:
if (value) {
wacom_wac->serial[0] = (wacom_wac->serial[0] & ~0xFFFFFFFFULL);
@ -2254,6 +2260,12 @@ static void wacom_wac_pen_report(struct hid_device *hdev,
if (!delay_pen_events(wacom_wac) && wacom_wac->tool[0]) {
int id = wacom_wac->id[0];
int sw_state = wacom_wac->hid_data.barrelswitch |
(wacom_wac->hid_data.barrelswitch2 << 1);
input_report_key(input, BTN_STYLUS, sw_state == 1);
input_report_key(input, BTN_STYLUS2, sw_state == 2);
input_report_key(input, BTN_STYLUS3, sw_state == 3);
/*
* Non-USI EMR tools should have their IDs mangled to
@ -3300,9 +3312,11 @@ int wacom_setup_pen_input_capabilities(struct input_dev *input_dev,
else
__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
if (features->type == HID_GENERIC)
/* setup has already been done */
if (features->type == HID_GENERIC) {
/* setup has already been done; apply otherwise-undetectible quirks */
input_set_capability(input_dev, EV_KEY, BTN_STYLUS3);
return 0;
}
__set_bit(BTN_TOUCH, input_dev->keybit);
__set_bit(ABS_MISC, input_dev->absbit);

2
drivers/hid/wacom_wac.h
View File

@ -291,6 +291,8 @@ struct hid_data {
bool inrange_state;
bool invert_state;
bool tipswitch;
bool barrelswitch;
bool barrelswitch2;
int x;
int y;
int pressure;

1
include/uapi/linux/input-event-codes.h
View File

@ -406,6 +406,7 @@
#define BTN_TOOL_MOUSE 0x146
#define BTN_TOOL_LENS 0x147
#define BTN_TOOL_QUINTTAP 0x148 /* Five fingers on trackpad */
#define BTN_STYLUS3 0x149
#define BTN_TOUCH 0x14a
#define BTN_STYLUS 0x14b
#define BTN_STYLUS2 0x14c