linux-kernel - [PATCH 36/40] Input: atmel_mxt_ts - Handle reports from T47 Stylus object

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Date:	Fri, 22 Feb 2013 17:58:23 +0000
From:	Nick Dyer <nick.dyer@...ev.co.uk>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Henrik Rydberg <rydberg@...omail.se>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	Alan.Bowens@...el.com, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, pmeerw@...erw.net,
	bleung@...omium.org, olofj@...omium.org
Cc:	Nick Dyer <nick.dyer@...ev.co.uk>
Subject: [PATCH 36/40] Input: atmel_mxt_ts - Handle reports from T47 Stylus object

Signed-off-by: Nick Dyer <nick.dyer@...ev.co.uk>
---
 drivers/input/touchscreen/atmel_mxt_ts.c |   19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 267b5d8..79fe3ba 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -130,6 +130,9 @@ static unsigned long mxt_t15_keystatus;
 /* Define for MXT_PROCI_TOUCHSUPPRESSION_T42 */
 #define MXT_T42_MSG_TCHSUP	(1 << 0)
 
+/* T47 Stylus */
+#define MXT_TOUCH_MAJOR_T47_STYLUS	1
+
 /* T63 Stylus */
 #define MXT_STYLUS_PRESS	(1 << 0)
 #define MXT_STYLUS_RELEASE	(1 << 1)
@@ -625,6 +628,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 	int area;
 	int amplitude;
 	u8 vector;
+	int tool;
 
 	/* do not report events if input device not yet registered */
 	if (!input_dev)
@@ -641,6 +645,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 		y >>= 2;
 
 	area = message[5];
+
 	amplitude = message[6];
 	vector = message[7];
 
@@ -664,13 +669,21 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 		 * status messages, indicating all the events that have
 		 * happened */
 		if (status & MXT_T9_RELEASE) {
-			input_mt_report_slot_state(input_dev,
-						   MT_TOOL_FINGER, 0);
+			input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
 			mxt_input_sync(input_dev);
 		}
 
+		/* A reported size of zero indicates that the reported touch
+		 * is a stylus from a linked Stylus T47 object. */
+		if (area == 0) {
+			area = MXT_TOUCH_MAJOR_T47_STYLUS;
+			tool = MT_TOOL_PEN;
+		} else {
+			tool = MT_TOOL_FINGER;
+		}
+
 		/* Touch active */
-		input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
+		input_mt_report_slot_state(input_dev, tool, 1);
 		input_report_abs(input_dev, ABS_MT_POSITION_X, x);
 		input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
 		input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
-- 
1.7.10.4

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