linux-kernel - [PATCH 24/40] Input: atmel_mxt_ts - Implement vector/orientation support

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Message-Id: <1361555907-19840-25-git-send-email-nick.dyer@itdev.co.uk>
Date:	Fri, 22 Feb 2013 17:58:11 +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 24/40] Input: atmel_mxt_ts - Implement vector/orientation support

The atmel touch messages contain orientation information as a byte in a packed
format which can be passed straight on to Android if the input device
configuration is correct, see
http://source.android.com/tech/input/touch-devices.html#touchorientationcalibration

This requires vector reports to be enabled in maXTouch config (zero DISVECT
bit in T9 CTRL field)

Android converts the format in frameworks/base/services/input/Input.cpp,
search for ORIENTATION_CALIBRATION_VECTOR.

Signed-off-by: Nick Dyer <nick.dyer@...ev.co.uk>
---
 drivers/input/touchscreen/atmel_mxt_ts.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index b1fdc36..6ab7ef6 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -621,6 +621,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 	int y;
 	int area;
 	int amplitude;
+	u8 vector;
 
 	/* do not report events if input device not yet registered */
 	if (!input_dev)
@@ -638,9 +639,10 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 
 	area = message[5];
 	amplitude = message[6];
+	vector = message[7];
 
 	dev_dbg(dev,
-		"[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
+		"[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u vector: %02X\n",
 		id,
 		(status & MXT_T9_DETECT) ? 'D' : '.',
 		(status & MXT_T9_PRESS) ? 'P' : '.',
@@ -650,7 +652,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 		(status & MXT_T9_AMP) ? 'A' : '.',
 		(status & MXT_T9_SUPPRESS) ? 'S' : '.',
 		(status & MXT_T9_UNGRIP) ? 'U' : '.',
-		x, y, area, amplitude);
+		x, y, area, amplitude, vector);
 
 	input_mt_slot(input_dev, id);
 
@@ -670,6 +672,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 		input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
 		input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
 		input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
+		input_report_abs(input_dev, ABS_MT_ORIENTATION, vector);
 	} else {
 		/* Touch no longer active, close out slot */
 		input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
@@ -1945,6 +1948,8 @@ static int mxt_initialize_t9_input_device(struct mxt_data *data)
 			     0, data->max_y, 0, 0);
 	input_set_abs_params(input_dev, ABS_MT_PRESSURE,
 			     0, 255, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
+			     0, 255, 0, 0);
 
 	input_set_drvdata(input_dev, data);
 
-- 
1.7.10.4

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