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HID: wacom: peport In Range event according to the spec

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Some Cintiq and Intuos tablets report In Range event. This event is sent before
valid data is reported when tool enters proximity; or before out of proximity
event is reported when tool exits.

While entering proximity, In Range means a pen is detected. This information
can be used for palm/touch rejection on both pen and touch enabled devices.
While exiting, it means the tool has reached its maximum detectable distance.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Ping Cheng 2015-01-09 11:05:13 -08:00 committed by Jiri Kosina
parent 373a5356df
commit b3bd7ef397
2 changed files with 9 additions and 7 deletions
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15
drivers/hid/wacom_wac.c
View File

@ -443,9 +443,6 @@ static int wacom_intuos_inout(struct wacom_wac *wacom)
/* Enter report */
if ((data[1] & 0xfc) == 0xc0) {
if (features->quirks & WACOM_QUIRK_MULTI_INPUT)
wacom->shared->stylus_in_proximity = true;
/* serial number of the tool */
wacom->serial[idx] = ((data[3] & 0x0f) << 28) +
(data[4] << 20) + (data[5] << 12) +
@ -554,19 +551,22 @@ static int wacom_intuos_inout(struct wacom_wac *wacom)
(features->type == CINTIQ && !(data[1] & 0x40)))
return 1;
/* Range Report */
if ((data[1] & 0xfe) == 0x20) {
if (features->quirks & WACOM_QUIRK_MULTI_INPUT)
wacom->shared->stylus_in_proximity = true;
/* in Range while exiting */
if (((data[1] & 0xfe) == 0x20) && wacom->reporting_data) {
input_report_key(input, BTN_TOUCH, 0);
input_report_abs(input, ABS_PRESSURE, 0);
input_report_abs(input, ABS_DISTANCE, wacom->features.distance_max);
if (features->quirks & WACOM_QUIRK_MULTI_INPUT)
wacom->shared->stylus_in_proximity = true;
return 2;
}
/* Exit report */
if ((data[1] & 0xfe) == 0x80) {
if (features->quirks & WACOM_QUIRK_MULTI_INPUT)
wacom->shared->stylus_in_proximity = false;
wacom->reporting_data = false;
/* don't report exit if we don't know the ID */
if (!wacom->id[idx])
@ -952,6 +952,7 @@ static int wacom_intuos_irq(struct wacom_wac *wacom)
input_report_abs(input, ABS_MISC, wacom->id[idx]); /* report tool id */
input_report_key(input, wacom->tool[idx], 1);
input_event(input, EV_MSC, MSC_SERIAL, wacom->serial[idx]);
wacom->reporting_data = true;
return 1;
}

1
drivers/hid/wacom_wac.h
View File

@ -189,6 +189,7 @@ struct wacom_wac {
int tool[2];
int id[2];
__u32 serial[2];
bool reporting_data;
struct wacom_features features;
struct wacom_shared *shared;
struct input_dev *input;