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HID: wacom: generic: add the "Report Valid" usage 

Wacom Bluetooth reports contain multiple pen frames per report.
Each frame contains a flag indicating if the frame is valid.
Future Wacom devices with this type of report may contain HID
descriptors, add support for this usage to the generic codepath
of the Wacom driver.

Signed-off-by: Aaron Armstrong Skomra <skomra@gmail.com>
Reviewed-by: Ping Cheng <ping.cheng@wacom.com>
Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Aaron Armstrong Skomra 2018-03-06 10:48:35 -08:00 committed by Jiri Kosina
parent f8b6a74719
commit b1f466a90c
2 changed files with 17 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/hid/wacom_wac.c
View File

@ -1715,7 +1715,8 @@ int wacom_equivalent_usage(int usage)
usage == WACOM_HID_WD_TOUCHSTRIP ||
usage == WACOM_HID_WD_TOUCHSTRIP2 ||
usage == WACOM_HID_WD_TOUCHRING ||
usage == WACOM_HID_WD_TOUCHRINGSTATUS) {
usage == WACOM_HID_WD_TOUCHRINGSTATUS ||
usage == WACOM_HID_WD_REPORT_VALID) {
return usage;
}
@ -2199,6 +2200,9 @@ static void wacom_wac_pen_event(struct hid_device *hdev, struct hid_field *field
struct input_dev *input = wacom_wac->pen_input;
unsigned equivalent_usage = wacom_equivalent_usage(usage->hid);
if (wacom_wac->is_invalid_bt_frame)
return;
switch (equivalent_usage) {
case HID_GD_Z:
/*
@ -2295,6 +2299,9 @@ static void wacom_wac_pen_event(struct hid_device *hdev, struct hid_field *field
features->offset_bottom);
features->offset_bottom = value;
return;
case WACOM_HID_WD_REPORT_VALID:
wacom_wac->is_invalid_bt_frame = !value;
return;
}
/* send pen events only when touch is up or forced out
@ -2313,6 +2320,10 @@ static void wacom_wac_pen_event(struct hid_device *hdev, struct hid_field *field
static void wacom_wac_pen_pre_report(struct hid_device *hdev,
struct hid_report *report)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
wacom_wac->is_invalid_bt_frame = false;
return;
}
@ -2325,6 +2336,9 @@ static void wacom_wac_pen_report(struct hid_device *hdev,
bool range = wacom_wac->hid_data.inrange_state;
bool sense = wacom_wac->hid_data.sense_state;
if (wacom_wac->is_invalid_bt_frame)
return;
if (!wacom_wac->tool[0] && range) { /* first in range */
/* Going into range select tool */
if (wacom_wac->hid_data.invert_state)

3
drivers/hid/wacom_wac.h
View File

@ -118,6 +118,7 @@
#define WACOM_HID_WD_TOUCHSTRIP2 (WACOM_HID_UP_WACOMDIGITIZER | 0x0137)
#define WACOM_HID_WD_TOUCHRING (WACOM_HID_UP_WACOMDIGITIZER | 0x0138)
#define WACOM_HID_WD_TOUCHRINGSTATUS (WACOM_HID_UP_WACOMDIGITIZER | 0x0139)
#define WACOM_HID_WD_REPORT_VALID (WACOM_HID_UP_WACOMDIGITIZER | 0x01d0)
#define WACOM_HID_WD_ACCELEROMETER_X (WACOM_HID_UP_WACOMDIGITIZER | 0x0401)
#define WACOM_HID_WD_ACCELEROMETER_Y (WACOM_HID_UP_WACOMDIGITIZER | 0x0402)
#define WACOM_HID_WD_ACCELEROMETER_Z (WACOM_HID_UP_WACOMDIGITIZER | 0x0403)
@ -353,7 +354,7 @@ struct wacom_wac {
bool has_mute_touch_switch;
bool has_mode_change;
bool is_direct_mode;
bool is_invalid_bt_frame;
};
#endif