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 <hanipouspi...@gmail.com> --- drivers/input/mouse/focaltech.c | 53 +++++++++++++++++++++++++---------------- 1 file changed, 32 insertions(+), 21 deletions(-) diff --git a/drivers/input/mouse/focaltech.c b/drivers/input/mouse/focaltech.c index 23d2594..1ef9d2b 100644 --- a/drivers/input/mouse/focaltech.c +++ b/drivers/input/mouse/focaltech.c @@ -55,8 +55,6 @@ static void focaltech_reset(struct psmouse *psmouse) psmouse_reset(psmouse); } -#ifdef CONFIG_MOUSE_PS2_FOCALTECH - /* * Packet types - the numbers are not consecutive, so we might be missing * something here. @@ -105,6 +103,16 @@ struct focaltech_hw_state { /* True if the clickpad has been pressed. */ bool pressed; + + /* + * Finger width 0-7 and 15 for 'latching' + * 15 value stays until the finger is released + * Width is reported only when 1 finger is active + */ + unsigned int width; + + /* Finger count */ + unsigned int count; }; struct focaltech_data { @@ -118,7 +126,7 @@ static void focaltech_report_state(struct psmouse *psmouse) struct focaltech_hw_state *state = &priv->state; struct input_dev *dev = psmouse->dev; int i; - + for (i = 0; i < FOC_MAX_FINGERS; i++) { struct focaltech_finger_state *finger = &state->fingers[i]; bool active = finger->active && finger->valid; @@ -126,21 +134,23 @@ static void focaltech_report_state(struct psmouse *psmouse) input_mt_slot(dev, i); input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); if (active) { - unsigned int clamped_x, clamped_y; + int clamped_x, clamped_y; /* * The touchpad might report invalid data, so we clamp * the resulting values so that we do not confuse * userspace. */ - clamped_x = clamp(finger->x, 0U, priv->x_max); - clamped_y = clamp(finger->y, 0U, priv->y_max); + clamped_x = clamp((int)finger->x, 0, (int)priv->x_max); + clamped_y = clamp((int)finger->y, 0, (int)priv->y_max); input_report_abs(dev, ABS_MT_POSITION_X, clamped_x); input_report_abs(dev, ABS_MT_POSITION_Y, priv->y_max - clamped_y); + if (state->count == 1) + input_report_abs(dev, ABS_TOOL_WIDTH, state->width); } } - input_mt_report_pointer_emulation(dev, true); - + input_mt_report_finger_count(dev, state->count); + input_mt_report_pointer_emulation(dev, false); input_report_key(psmouse->dev, BTN_LEFT, state->pressed); input_sync(psmouse->dev); } @@ -152,13 +162,17 @@ static void focaltech_process_touch_packet(struct psmouse *psmouse, struct focaltech_hw_state *state = &priv->state; unsigned char fingers = packet[1]; int i; + int count = 0; state->pressed = (packet[0] >> 4) & 1; /* the second byte contains a bitmap of all fingers touching the pad */ for (i = 0; i < FOC_MAX_FINGERS; i++) { - state->fingers[i].active = fingers & 0x1; - if (!state->fingers[i].active) { + + if (fingers & 0x1) { + state->fingers[i].active = true; + count++; + } else { /* * Even when the finger becomes active again, we still * will have to wait for the first valid position. @@ -167,6 +181,8 @@ static void focaltech_process_touch_packet(struct psmouse *psmouse, } fingers >>= 1; } + state->width = packet[5] >> 4; + state->count = count; } static void focaltech_process_abs_packet(struct psmouse *psmouse, @@ -187,6 +203,7 @@ 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 +348,7 @@ 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); } @@ -428,9 +446,8 @@ int focaltech_init(struct psmouse *psmouse) /* resync is not supported yet */ psmouse->resync_time = 0; /* - * rate/resolution/scale changes are not supported yet, and - * the generic implementations of these functions seem to - * confuse some touchpads + * rate/resolution/scale changes are not supported yet, and the generic + * implementations of these functions seem to confuse some touchpads */ psmouse->set_resolution = focaltech_set_resolution; psmouse->set_rate = focaltech_set_rate; @@ -444,13 +461,7 @@ fail: return error; } -#else /* CONFIG_MOUSE_PS2_FOCALTECH */ - -int focaltech_init(struct psmouse *psmouse) +bool focaltech_supported(void) { - focaltech_reset(psmouse); - - return 0; + return true; } - -#endif /* CONFIG_MOUSE_PS2_FOCALTECH */ -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html