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authorJason Gerecke <killertofu@gmail.com>2018-05-18 07:17:18 -0700
committerJiri Kosina <jkosina@suse.cz>2018-05-22 14:35:14 +0200
commit8947b0cfdcc111722b2293f26debdab8697f4c68 (patch)
treef31ec4a547bdfd8d0a489346d1fc604703d7073e /drivers/hid
parent008464a9360e31b14677457dcd976fbf9dd58e2e (diff)
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HID: wacom: Support "in range" for Intuos/Bamboo tablets where possible
The 1st-generation Intuos tablets (CTL-X80) include an "in range" flag like some professional tablets. To ensure the pen remains usable at as large as distance as possible (and to preemptively disable touch when it is nearby) we need to ensure that we handle these "in range" events. Handling of tool type identification has been moved to occur only when the pen is fully in prox rather than any time the "stylus_in_proximity" flag changes (which is controlled by the further-out "in range" flag). Link: https://sourceforge.net/p/linuxwacom/bugs/358/ Link: https://github.com/linuxwacom/xf86-input-wacom/issues/14 Link: https://github.com/linuxwacom/xf86-input-wacom/issues/17 Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com> Tested-by: Ping Cheng <ping.cheng@wacom.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/wacom_wac.c74
1 files changed, 39 insertions, 35 deletions
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 5f947ec20dcb..0bb44d0088ed 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -2894,24 +2894,31 @@ static int wacom_bpt_pen(struct wacom_wac *wacom)
struct wacom_features *features = &wacom->features;
struct input_dev *input = wacom->pen_input;
unsigned char *data = wacom->data;
- int prox = 0, x = 0, y = 0, p = 0, d = 0, pen = 0, btn1 = 0, btn2 = 0;
+ int x = 0, y = 0, p = 0, d = 0;
+ bool pen = false, btn1 = false, btn2 = false;
+ bool range, prox, rdy;
if (data[0] != WACOM_REPORT_PENABLED)
return 0;
- prox = (data[1] & 0x20) == 0x20;
+ range = (data[1] & 0x80) == 0x80;
+ prox = (data[1] & 0x40) == 0x40;
+ rdy = (data[1] & 0x20) == 0x20;
+
+ wacom->shared->stylus_in_proximity = range;
+ if (delay_pen_events(wacom))
+ return 0;
+
+ if (rdy) {
+ p = le16_to_cpup((__le16 *)&data[6]);
+ pen = data[1] & 0x01;
+ btn1 = data[1] & 0x02;
+ btn2 = data[1] & 0x04;
+ }
+ if (prox) {
+ x = le16_to_cpup((__le16 *)&data[2]);
+ y = le16_to_cpup((__le16 *)&data[4]);
- /*
- * All reports shared between PEN and RUBBER tool must be
- * forced to a known starting value (zero) when transitioning to
- * out-of-prox.
- *
- * If not reset then, to userspace, it will look like lost events
- * if new tool comes in-prox with same values as previous tool sent.
- *
- * Hardware does report zero in most out-of-prox cases but not all.
- */
- if (!wacom->shared->stylus_in_proximity) {
if (data[1] & 0x08) {
wacom->tool[0] = BTN_TOOL_RUBBER;
wacom->id[0] = ERASER_DEVICE_ID;
@@ -2919,16 +2926,9 @@ static int wacom_bpt_pen(struct wacom_wac *wacom)
wacom->tool[0] = BTN_TOOL_PEN;
wacom->id[0] = STYLUS_DEVICE_ID;
}
+ wacom->reporting_data = true;
}
-
- wacom->shared->stylus_in_proximity = prox;
- if (delay_pen_events(wacom))
- return 0;
-
- if (prox) {
- x = le16_to_cpup((__le16 *)&data[2]);
- y = le16_to_cpup((__le16 *)&data[4]);
- p = le16_to_cpup((__le16 *)&data[6]);
+ if (range) {
/*
* Convert distance from out prox to distance from tablet.
* distance will be greater than distance_max once
@@ -2937,25 +2937,29 @@ static int wacom_bpt_pen(struct wacom_wac *wacom)
*/
if (data[8] <= features->distance_max)
d = features->distance_max - data[8];
-
- pen = data[1] & 0x01;
- btn1 = data[1] & 0x02;
- btn2 = data[1] & 0x04;
} else {
wacom->id[0] = 0;
}
- input_report_key(input, BTN_TOUCH, pen);
- input_report_key(input, BTN_STYLUS, btn1);
- input_report_key(input, BTN_STYLUS2, btn2);
+ if (wacom->reporting_data) {
+ input_report_key(input, BTN_TOUCH, pen);
+ input_report_key(input, BTN_STYLUS, btn1);
+ input_report_key(input, BTN_STYLUS2, btn2);
- input_report_abs(input, ABS_X, x);
- input_report_abs(input, ABS_Y, y);
- input_report_abs(input, ABS_PRESSURE, p);
- input_report_abs(input, ABS_DISTANCE, d);
+ if (prox || !range) {
+ input_report_abs(input, ABS_X, x);
+ input_report_abs(input, ABS_Y, y);
+ }
+ input_report_abs(input, ABS_PRESSURE, p);
+ input_report_abs(input, ABS_DISTANCE, d);
- input_report_key(input, wacom->tool[0], prox); /* PEN or RUBBER */
- input_report_abs(input, ABS_MISC, wacom->id[0]); /* TOOL ID */
+ input_report_key(input, wacom->tool[0], range); /* PEN or RUBBER */
+ input_report_abs(input, ABS_MISC, wacom->id[0]); /* TOOL ID */
+ }
+
+ if (!range) {
+ wacom->reporting_data = false;
+ }
return 1;
}