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.
---
drivers/input/mouse/focaltech.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/input/mouse/focaltech.c b/drivers/input/mouse/focaltech.c
index 23d2594..513a7e1 100644
--- a/drivers/input/mouse/focaltech.c
+++ b/drivers/input/mouse/focaltech.c
@@ -90,6 +90,13 @@ struct focaltech_finger_state {
*/
unsigned int x;
unsigned int y;
+
+ /*
+ * Finger width 0-7 and 15 for 'latching'
+ * 15 value stays until the finger is released
+ * Width is reported only in absolute packets
+ */
+ unsigned int width;
};
/*
@@ -112,7 +119,7 @@ struct focaltech_data {
struct focaltech_hw_state state;
};
-static void focaltech_report_state(struct psmouse *psmouse)
+static void focaltech_report_state(struct psmouse *psmouse, bool abs)
{
struct focaltech_data *priv = psmouse->private;
struct focaltech_hw_state *state = &priv->state;
@@ -137,6 +144,7 @@ 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);
+ if (abs) input_report_abs(dev, ABS_TOOL_WIDTH, state->width);
}
}
input_mt_report_pointer_emulation(dev, true);
@@ -187,6 +195,7 @@ 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->fingers[finger].width = packet[5] >> 4;
state->fingers[finger].valid = true;
}
@@ -228,14 +237,17 @@ static void focaltech_process_packet(struct psmouse *psmouse)
switch (packet[0] & 0xf) {
case FOC_TOUCH:
focaltech_process_touch_packet(psmouse, packet);
+ focaltech_report_state(psmouse, false);
break;
case FOC_ABS:
focaltech_process_abs_packet(psmouse, packet);
+ focaltech_report_state(psmouse, true);
break;
case FOC_REL:
focaltech_process_rel_packet(psmouse, packet);
+ focaltech_report_state(psmouse, false);
break;
default:
@@ -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);
}
--
1.9.1