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Input: focaltech - report finger width to userspace

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Focaltech touchpads report finger width in packet[5] of absolute packet.
Range for width in raw format is 0x10 - 0x70. Second half-byte is always 0.
0xff is reported, when a large contact area is detected.
This can be handled in userspace.

Signed-off-by: Dmitry Tunin <hanipouspilot@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Tunin 2015-05-31 11:26:49 -07:00 committed by Dmitry Torokhov
parent ffb6e0c9a0
commit 85919a00e5
1 changed files with 13 additions and 0 deletions
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13
drivers/input/mouse/focaltech.c
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@ -103,6 +103,16 @@ struct focaltech_hw_state {
*/
struct focaltech_finger_state fingers[FOC_MAX_FINGERS];
/*
* Finger width 0-7 and 15 for a very big contact area.
* 15 value stays until the finger is released.
* Width is reported only in absolute packets.
* Since hardware reports width only for last touching finger,
* there is no need to store width for every specific finger,
* so we keep only last value reported.
*/
unsigned int width;
/* True if the clickpad has been pressed. */
bool pressed;
};
@ -137,6 +147,7 @@ static void focaltech_report_state(struct psmouse *psmouse)
input_report_abs(dev, ABS_MT_POSITION_X, clamped_x);
input_report_abs(dev, ABS_MT_POSITION_Y,
priv->y_max - clamped_y);
input_report_abs(dev, ABS_TOOL_WIDTH, state->width);
}
}
input_mt_report_pointer_emulation(dev, true);
@ -187,6 +198,7 @@ static void focaltech_process_abs_packet(struct psmouse *psmouse,
state->fingers[finger].x = ((packet[1] & 0xf) << 8) | packet[2];
state->fingers[finger].y = (packet[3] << 8) | packet[4];
state->width = packet[5] >> 4;
state->fingers[finger].valid = true;
}
@ -331,6 +343,7 @@ static void focaltech_set_input_params(struct psmouse *psmouse)
__set_bit(EV_ABS, dev->evbit);
input_set_abs_params(dev, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
input_mt_init_slots(dev, 5, INPUT_MT_POINTER);
__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
}