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Commit b5c921e6 authored Oct 19, 2016 by Jason Gerecke Committed by Jiri Kosina Oct 20, 2016

HID: wacom: generic: Add support for vendor-defined "Distance" usage

The vendor-defined 0xFF0D01032 ("Distance") usage is nearly equivalent to
HID_GD_Z, except that the axis direction is inverted. Unlike HID_GD_Z which
increases in value as the pen-to-surface distance is decreased, this usage
decreases. Treat this usage as a special case to ensure we don't invert the
scale to be ABS_DISTANCE compatible like we do for HID_GD_Z.

Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

parent c9c09587

drivers/hid/wacom_wac.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1442,7 +1442,8 @@ static int wacom_equivalent_usage(int usage)
		int subusage = (usage & 0xFF);

		if (subpage == WACOM_HID_SP_DIGITIZER \|\|
		subpage == WACOM_HID_SP_DIGITIZERINFO) {
		subpage == WACOM_HID_SP_DIGITIZERINFO \|\|
		usage == WACOM_HID_WD_DISTANCE) {
		return usage;
		}

		@@ -1502,6 +1503,7 @@ static void wacom_wac_pen_usage_mapping(struct hid_device *hdev,
		case HID_GD_Y:
		wacom_map_usage(input, usage, field, EV_ABS, ABS_Y, 4);
		break;
		case WACOM_HID_WD_DISTANCE:
		case HID_GD_Z:
		wacom_map_usage(input, usage, field, EV_ABS, ABS_DISTANCE, 0);
		break;

drivers/hid/wacom_wac.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -88,6 +88,7 @@
		#define WACOM_HID_SP_DIGITIZER 0x000d0000
		#define WACOM_HID_SP_DIGITIZERINFO 0x00100000
		#define WACOM_HID_WD_DIGITIZER (WACOM_HID_UP_WACOMDIGITIZER \| 0x01)
		#define WACOM_HID_WD_DISTANCE (WACOM_HID_UP_WACOMDIGITIZER \| 0x0132)
		#define WACOM_HID_WD_DATAMODE (WACOM_HID_UP_WACOMDIGITIZER \| 0x1002)
		#define WACOM_HID_UP_G9 0xff090000
		#define WACOM_HID_G9_PEN (WACOM_HID_UP_G9 \| 0x02)