[PATCH 37/51] Input: atmel_mxt_ts - Implement vector/orientation support

From: Nick Dyer
Date: Thu Jun 27 2013 - 08:55:50 EST


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@xxxxxxxxxxx>
Acked-by: Benson Leung <bleung@xxxxxxxxxxxx>
---
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 1c5e640..9188cf7 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -716,6 +716,7 @@ 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 (!data->enable_reporting)
@@ -734,9 +735,10 @@ 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' : '.',
@@ -746,7 +748,7 @@ 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);

@@ -766,6 +768,7 @@ 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/* Touch no longer active, close out slot */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);
@@ -2100,6 +2103,8 @@ 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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