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authorAaron Armstrong Skomra <skomra@gmail.com>2018-03-06 10:48:35 -0800
committerJiri Kosina <jkosina@suse.cz>2018-03-07 15:21:44 +0100
commitb1f466a90c516d54bd8bea7fb142a807d7800304 (patch)
tree13055b214546129acaf32904d6e76d416b294b3c /drivers/hid/wacom_wac.c
parentf8b6a74719b5e003e28b2deb7ef91d7158333cbf (diff)
downloadlinux-b1f466a90c516d54bd8bea7fb142a807d7800304.tar.gz
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>
Diffstat (limited to 'drivers/hid/wacom_wac.c')
-rw-r--r--drivers/hid/wacom_wac.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 7a0a7f67e7ed..afa8c9f24a42 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -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)