Commit b3bd7ef3 authored by Ping Cheng's avatar Ping Cheng Committed by Jiri Kosina
Browse files

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



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: default avatarPing Cheng <pingc@wacom.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 373a5356

drivers/hid/wacom_wac.c

+8 −7
Original line number Diff line number Diff line
@@ -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;

}

drivers/hid/wacom_wac.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

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