Piranha

http://comments.gmane.org/gmane.linux.kernel.input/35013

Here is a patch of supporting ALPS v7 protocol device.
ALPS v7 protocol device is a clickpad that is currently used on
Lenovo S430/S435/S530, Lenovo Z410/Z510, HP Odie, HP Revolve 810 G1,
as well as other machines with ALPS Touchpad of following infomation:
	Device ID = 0x73, 0x03, 0x0a
	Firmware ID = 0x88, 0xb*, 0x**

A v7 protocol support patch is first relesed 2 months ago:
http://www.spinics.net/lists/linux-input/msg29084.html
After that some feedbacks were received from end user. Now this patch fixed
the bugs
reported by them:
1) Fix cursor jump when doing a right click drag
2) Fix cursor jitter when button clicking

Signed-off-by: Qiting Chen 
---
 drivers/input/mouse/alps.c | 560
++++++++++++++++++++++++++++++++++++++++++---
 drivers/input/mouse/alps.h | 132 +++++++++--
 2 files changed, 641 insertions(+), 51 deletions(-)

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index fb15c64..383281f 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -32,6 +32,13 @@
 #define ALPS_REG_BASE_RUSHMORE	0xc2c0
 #define ALPS_REG_BASE_PINNACLE	0x0000
 
+#define LEFT_BUTTON_BIT			0x01
+#define RIGHT_BUTTON_BIT		0x02
+
+#define V7_LARGE_MOVEMENT		130
+#define V7_DEAD_ZONE_OFFSET_X	72
+#define V7_DEAD_ZONE_OFFSET_Y	72
+
 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
 	{ PSMOUSE_CMD_SETPOLL,		0x00 }, /* 0 */
 	{ PSMOUSE_CMD_RESET_DIS,	0x00 }, /* 1 */
@@ -99,6 +106,7 @@ static const struct alps_nibble_commands
alps_v6_nibble_commands[] = {
 #define ALPS_FOUR_BUTTONS	0x40	/* 4 direction button present */
 #define ALPS_PS2_INTERLEAVED	0x80	/* 3-byte PS/2 packet interleaved with
 					   6-byte ALPS packet */
+#define ALPS_BTNLESS			0x100	/* ALPS ClickPad flag */
 
 static const struct alps_model_info alps_model_data[] = {
 	{ { 0x32, 0x02, 0x14 },	0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS |
ALPS_DUALPOINT },	/* Toshiba Salellite Pro M10 */
@@ -140,6 +148,20 @@ static void alps_set_abs_params_mt(struct alps_data
*priv,
  * isn't valid per PS/2 spec.
  */
 
+static unsigned int alps_pt_distance(struct alps_abs_data *pt0,
+				    struct alps_abs_data *pt1)
+{
+	int vect_x, vect_y;
+
+	if (!pt0 || !pt1)
+		return 0;
+
+	vect_x = pt0->x - pt1->x;
+	vect_y = pt0->y - pt1->y;
+
+	return int_sqrt(vect_x * vect_x + vect_y * vect_y);
+}
+
 /* Packet formats are described in Documentation/input/alps.txt */
 
 static bool alps_is_valid_first_byte(struct alps_data *priv,
@@ -320,8 +342,8 @@ static void alps_process_bitmap_dolphin(struct
alps_data *priv,
 		end_bit = y_msb - 1;
 		box_middle_y = (priv->y_max * (start_bit + end_bit)) /
 				(2 * (priv->y_bits - 1));
-		*x1 = fields->x;
-		*y1 = fields->y;
+		*x1 = fields->pt.x;
+		*y1 = fields->pt.y;
 		*x2 = 2 * box_middle_x - *x1;
 		*y2 = 2 * box_middle_y - *y1;
 	}
@@ -461,6 +483,38 @@ static void alps_report_semi_mt_data(struct input_dev
*dev, int num_fingers,
 	alps_set_slot(dev, 1, num_fingers == 2, x2, y2);
 }
 
+static void alps_report_coord_and_btn(struct psmouse *psmouse,
+				      struct alps_fields *f)
+{
+	struct input_dev *dev;
+
+	if (!psmouse || !f)
+		return;
+
+	dev = psmouse->dev;
+
+	if (f->fingers) {
+		input_report_key(dev, BTN_TOUCH, 1);
+		alps_report_semi_mt_data(dev, f->fingers,
+			f->pt_img[0].x, f->pt_img[0].y,
+			f->pt_img[1].x, f->pt_img[1].y);
+		input_mt_report_finger_count(dev, f->fingers);
+
+		input_report_abs(dev, ABS_X, f->pt_img[0].x);
+		input_report_abs(dev, ABS_Y, f->pt_img[0].y);
+		input_report_abs(dev, ABS_PRESSURE, f->pt_img[0].z);
+	} else {
+		input_report_key(dev, BTN_TOUCH, 0);
+		input_mt_report_finger_count(dev, 0);
+		input_report_abs(dev, ABS_PRESSURE, 0);
+	}
+
+	input_report_key(dev, BTN_LEFT, f->btn.left);
+	input_report_key(dev, BTN_RIGHT, f->btn.right);
+
+	input_sync(dev);
+}
+
 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
@@ -523,13 +577,13 @@ static void alps_process_trackstick_packet_v3(struct
psmouse *psmouse)
 
 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char
*p)
 {
-	f->left = !!(p[3] & 0x01);
-	f->right = !!(p[3] & 0x02);
-	f->middle = !!(p[3] & 0x04);
+	f->btn.left = !!(p[3] & 0x01);
+	f->btn.right = !!(p[3] & 0x02);
+	f->btn.middle = !!(p[3] & 0x04);
 
-	f->ts_left = !!(p[3] & 0x10);
-	f->ts_right = !!(p[3] & 0x20);
-	f->ts_middle = !!(p[3] & 0x40);
+	f->btn.ts_left = !!(p[3] & 0x10);
+	f->btn.ts_right = !!(p[3] & 0x20);
+	f->btn.ts_middle = !!(p[3] & 0x40);
 }
 
 static void alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
@@ -546,10 +600,10 @@ static void alps_decode_pinnacle(struct alps_fields
*f, unsigned char *p,
 		   ((p[2] & 0x7f) << 1) |
 		   (p[4] & 0x01);
 
-	f->x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
+	f->pt.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
 	       ((p[0] & 0x30) >> 4);
-	f->y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
-	f->z = p[5] & 0x7f;
+	f->pt.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
+	f->pt.z = p[5] & 0x7f;
 
 	alps_decode_buttons_v3(f, p);
 }
@@ -573,9 +627,9 @@ static void alps_decode_dolphin(struct alps_fields *f,
unsigned char *p,
 	f->is_mp = !!(p[0] & 0x20);
 
 	if (!f->is_mp) {
-		f->x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
-		f->y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
-		f->z = (p[0] & 4) ? 0 : p[5] & 0x7f;
+		f->pt.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
+		f->pt.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
+		f->pt.z = (p[0] & 4) ? 0 : p[5] & 0x7f;
 		alps_decode_buttons_v3(f, p);
 	} else {
 		f->fingers = ((p[0] & 0x6) >> 1 |
@@ -687,7 +741,7 @@ static void alps_process_touchpad_packet_v3_v5(struct
psmouse *psmouse)
 	 * with x, y, and z all zero, so these seem to be flukes.
 	 * Ignore them.
 	 */
-	if (f.x && f.y && !f.z)
+	if (f.pt.x && f.pt.y && !f.pt.z)
 		return;
 
 	/*
@@ -695,12 +749,12 @@ static void alps_process_touchpad_packet_v3_v5(struct
psmouse *psmouse)
 	 * to rely on ST data.
 	 */
 	if (!fingers) {
-		x1 = f.x;
-		y1 = f.y;
-		fingers = f.z > 0 ? 1 : 0;
+		x1 = f.pt.x;
+		y1 = f.pt.y;
+		fingers = f.pt.z > 0 ? 1 : 0;
 	}
 
-	if (f.z >= 64)
+	if (f.pt.z >= 64)
 		input_report_key(dev, BTN_TOUCH, 1);
 	else
 		input_report_key(dev, BTN_TOUCH, 0);
@@ -709,22 +763,22 @@ static void alps_process_touchpad_packet_v3_v5(struct
psmouse *psmouse)
 
 	input_mt_report_finger_count(dev, fingers);
 
-	input_report_key(dev, BTN_LEFT, f.left);
-	input_report_key(dev, BTN_RIGHT, f.right);
-	input_report_key(dev, BTN_MIDDLE, f.middle);
+	input_report_key(dev, BTN_LEFT, f.btn.left);
+	input_report_key(dev, BTN_RIGHT, f.btn.right);
+	input_report_key(dev, BTN_MIDDLE, f.btn.middle);
 
-	if (f.z > 0) {
-		input_report_abs(dev, ABS_X, f.x);
-		input_report_abs(dev, ABS_Y, f.y);
+	if (f.pt.z > 0) {
+		input_report_abs(dev, ABS_X, f.pt.x);
+		input_report_abs(dev, ABS_Y, f.pt.y);
 	}
-	input_report_abs(dev, ABS_PRESSURE, f.z);
+	input_report_abs(dev, ABS_PRESSURE, f.pt.z);
 
 	input_sync(dev);
 
 	if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
-		input_report_key(dev2, BTN_LEFT, f.ts_left);
-		input_report_key(dev2, BTN_RIGHT, f.ts_right);
-		input_report_key(dev2, BTN_MIDDLE, f.ts_middle);
+		input_report_key(dev2, BTN_LEFT, f.btn.ts_left);
+		input_report_key(dev2, BTN_RIGHT, f.btn.ts_right);
+		input_report_key(dev2, BTN_MIDDLE, f.btn.ts_middle);
 		input_sync(dev2);
 	}
 }
@@ -916,6 +970,364 @@ static void alps_process_packet_v4(struct psmouse
*psmouse)
 	input_sync(dev);
 }
 
+static bool alps_is_valid_package_v7(struct psmouse *psmouse)
+{
+	if ((psmouse->pktcnt == 3) && ((psmouse->packet[2] & 0x40) != 0x40))
+		return false;
+	if ((psmouse->pktcnt == 4) && ((psmouse->packet[3] & 0x48) != 0x48))
+		return false;
+	if ((psmouse->pktcnt == 6) && ((psmouse->packet[5] & 0x40) != 0x0))
+		return false;
+	return true;
+}
+
+static int alps_drop_unsupported_packet_v7(struct psmouse *psmouse)
+{
+	struct alps_data *priv = psmouse->private;
+	int drop = 1;
+
+	if (priv->r.v7.pkt_id == V7_PACKET_ID_NEW ||
+	    priv->r.v7.pkt_id == V7_PACKET_ID_TWO ||
+	    priv->r.v7.pkt_id == V7_PACKET_ID_MULTI ||
+	    priv->r.v7.pkt_id == V7_PACKET_ID_IDLE)
+		drop = 0;
+
+	return drop;
+}
+
+static unsigned char alps_get_packet_id_v7(char *byte)
+{
+	unsigned char packet_id;
+
+	if (byte[4] & 0x40)
+		packet_id = V7_PACKET_ID_TWO;
+	else if (byte[4] & 0x01)
+		packet_id = V7_PACKET_ID_MULTI;
+	else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
+		packet_id = V7_PACKET_ID_NEW;
+	else
+		packet_id = V7_PACKET_ID_IDLE;
+
+	return packet_id;
+}
+
+static void alps_get_finger_coordinate_v7(struct alps_abs_data *pt,
+					  unsigned char *pkt,
+					  unsigned char pkt_id)
+{
+	if ((pkt_id == V7_PACKET_ID_TWO) ||
+	   (pkt_id == V7_PACKET_ID_MULTI) ||
+	   (pkt_id == V7_PACKET_ID_NEW)) {
+		pt[0].x = ((pkt[2] & 0x80) << 4);
+		pt[0].x |= ((pkt[2] & 0x3F) << 5);
+		pt[0].x |= ((pkt[3] & 0x30) >> 1);
+		pt[0].x |= (pkt[3] & 0x07);
+		pt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
+
+		pt[1].x = ((pkt[3] & 0x80) << 4);
+		pt[1].x |= ((pkt[4] & 0x80) << 3);
+		pt[1].x |= ((pkt[4] & 0x3F) << 4);
+		pt[1].y = ((pkt[5] & 0x80) << 3);
+		pt[1].y |= ((pkt[5] & 0x3F) << 4);
+
+		if (pkt_id == V7_PACKET_ID_TWO) {
+			pt[1].x &= ~0x000F;
+			pt[1].y |= 0x000F;
+		} else if (pkt_id == V7_PACKET_ID_MULTI) {
+			pt[1].x &= ~0x003F;
+			pt[1].y &= ~0x0020;
+			pt[1].y |= ((pkt[4] & 0x02) << 4);
+			pt[1].y |= 0x001F;
+		} else if (pkt_id == V7_PACKET_ID_NEW) {
+			pt[1].x &= ~0x003F;
+			pt[1].x |= (pkt[0] & 0x20);
+			pt[1].y |= 0x000F;
+		}
+
+		pt[0].y = 0x7FF - pt[0].y;
+		pt[1].y = 0x7FF - pt[1].y;
+
+		pt[0].z = (pt[0].x && pt[0].y) ? 62 : 0;
+		pt[1].z = (pt[1].x && pt[1].y) ? 62 : 0;
+	}
+}
+
+static void alps_decode_packet_v7(struct alps_fields *f,
+				  unsigned char *p,
+				  struct psmouse *psmouse)
+{
+	struct alps_data *priv = psmouse->private;
+	static struct v7_raw prev_r;
+
+	priv->r.v7.pkt_id = alps_get_packet_id_v7(p);
+
+	alps_get_finger_coordinate_v7(f->pt_img, p, priv->r.v7.pkt_id);
+
+	priv->r.v7.rest_left = 0;
+	priv->r.v7.rest_right = 0;
+	priv->r.v7.additional_fingers = 0;
+	priv->phy_btn = 0;
+
+	if (priv->r.v7.pkt_id == V7_PACKET_ID_TWO ||
+	    priv->r.v7.pkt_id == V7_PACKET_ID_MULTI) {
+		priv->r.v7.rest_left = (p[0] & 0x10) >> 4;
+		priv->r.v7.rest_right = (p[0] & 0x20) >> 5;
+	}
+
+	if (priv->r.v7.pkt_id == V7_PACKET_ID_MULTI)
+		priv->r.v7.additional_fingers = p[5] & 0x03;
+
+	priv->phy_btn = (p[0] & 0x80) >> 7;
+
+	if (priv->r.v7.pkt_id == V7_PACKET_ID_TWO) {
+		if (f->pt_img[0].z != 0 && f->pt_img[1].z != 0)
+			priv->r.v7.raw_fn = 2;
+		else
+			priv->r.v7.raw_fn = 1;
+	} else if (priv->r.v7.pkt_id == V7_PACKET_ID_MULTI)
+		priv->r.v7.raw_fn = 3 + priv->r.v7.additional_fingers;
+	else if (priv->r.v7.pkt_id == V7_PACKET_ID_IDLE)
+		priv->r.v7.raw_fn = 0;
+	else if (priv->r.v7.pkt_id == V7_PACKET_ID_NEW)
+		priv->r.v7.raw_fn = prev_r.raw_fn;
+
+	/* It is a trick to bypass firmware bug of older version
+	that 'New' Packet is missed when finger number changed.
+	We fake a 'New' Packet in such cases.*/
+	if (priv->r.v7.pkt_id == V7_PACKET_ID_TWO ||
+		priv->r.v7.pkt_id == V7_PACKET_ID_MULTI ||
+		priv->r.v7.pkt_id == V7_PACKET_ID_IDLE) {
+		if (priv->r.v7.raw_fn != prev_r.raw_fn)
+			priv->r.v7.pkt_id = V7_PACKET_ID_NEW;
+	}
+
+	memcpy(&prev_r, &priv->r.v7, sizeof(struct v7_raw));
+}
+
+static void alps_set_each_pt_attr_v7(struct psmouse *psmouse,
+				     struct alps_abs_data *pt,
+				     struct alps_bl_pt_attr *pt_attr)
+{
+	struct alps_data *priv = psmouse->private;
+	unsigned int dist;
+
+	if (!pt_attr->is_init_pt_got && pt->z != 0) {
+		pt_attr->is_init_pt_got = 1;
+		pt_attr->is_counted = 0;
+		memcpy(&pt_attr->init_pt, pt, sizeof(pt_attr->init_pt));
+	}
+
+	if (pt->z != 0) {
+		if (pt->y < priv->resting_zone_y_min) {
+			/* A finger is recognized as a non-resting finger
+			if it's position is outside the resting finger zone.*/
+			pt_attr->zone = ZONE_NORMAL;
+			pt_attr->is_counted = 1;
+		} else {
+			/* A finger is recognized as a resting finger if it's
+			position is inside the resting finger zone and there's
+			no large movement from it's touch down position.*/
+			pt_attr->zone = ZONE_RESTING;
+
+			if (pt->x > priv->x_max / 2)
+				pt_attr->zone |= ZONE_RIGHT_BTN;
+			else
+				pt_attr->zone |= ZONE_LEFT_BTN;
+
+			/* A resting finger will turn to be a non-resting
+			finger if it has made large movement from it's touch
+			down position. A non-resting finger will never turn
+			to a resting finger before it leaves the touchpad
+			surface.*/
+			if (pt_attr->is_init_pt_got) {
+				dist = alps_pt_distance(pt, &pt_attr->init_pt);
+
+				if (dist > V7_LARGE_MOVEMENT)
+					pt_attr->is_counted = 1;
+			}
+		}
+	}
+}
+
+static void alps_set_pt_attr_v7(struct psmouse *psmouse,
+				       struct alps_fields *f)
+{
+	struct alps_data *priv = psmouse->private;
+	int i;
+
+	switch (priv->r.v7.pkt_id) {
+	case  V7_PACKET_ID_TWO:
+	case  V7_PACKET_ID_MULTI:
+		for (i = 0; i < V7_IMG_PT_NUM; i++) {
+			alps_set_each_pt_attr_v7(psmouse,
+						 &f->pt_img[i],
+						 &priv->pt_attr[i]);
+		}
+		break;
+	default:
+		/*All finger attributes are cleared when packet ID is
+		'IDLE', 'New'or other unknown IDs. An 'IDLE' packet
+		indicates that there's no finger and no button activity.
+		A 'NEW' packet indicates the finger position in packet
+		is not continues from previous packet. Such as the
+		condition there's finger placed or lifted. In these cases,
+		finger attributes will be reset.*/
+		memset(priv->pt_attr, 0, sizeof(priv->pt_attr[0]) * 2);
+		break;
+	}
+}
+
+static void alps_cal_output_finger_num_v7(struct psmouse *psmouse,
+					struct alps_fields *f)
+{
+	struct alps_data *priv = psmouse->private;
+	unsigned int fn = 0;
+	int i;
+
+	switch (priv->r.v7.pkt_id) {
+	case V7_PACKET_ID_IDLE:
+	case V7_PACKET_ID_NEW:
+		/*No finger is reported when packet ID is 'IDLE' or 'New'.
+		An 'IDLE' packet indicates that there's no finger on touchpad.
+		A 'NEW' packet indicates there's finger placed or lifted.
+		Finger position of 'New' packet is not continues from the
+		previous packet.*/
+		fn = 0;
+		break;
+	case V7_PACKET_ID_TWO:
+		if (f->pt_img[0].z == 0) {
+			/*The first finger slot is zero when a non-resting
+			finger lifted and remaining only one resting finger
+			on touchpad. Hardware report the remaining resting
+			finger in second slot. This resting is ignored*/
+			fn = 0;
+		} else if (f->pt_img[1].z == 0) {
+			/* The second finger slot is zero if there's
+			only one finger*/
+			fn = 1;
+		} else {
+			/*All non-resting fingers will be counted to report*/
+			fn = 0;
+			for (i = 0; i < V7_IMG_PT_NUM; i++) {
+				if (priv->pt_attr[i].is_counted)
+					fn++;
+			}
+
+			/*In the case that both fingers are
+			resting fingers, report the first one*/
+			if (!priv->pt_attr[0].is_counted &&
+			    !priv->pt_attr[1].is_counted) {
+				fn = 1;
+			}
+		}
+		break;
+	case V7_PACKET_ID_MULTI:
+		/*A packet ID 'MULTI' indicats that at least 3 non-resting
+		finger exist.*/
+		fn = 3 + priv->r.v7.additional_fingers;
+		break;
+	}
+
+	f->fingers = fn;
+}
+
+static void alps_button_dead_zone_filter(struct psmouse *psmouse,
+				   struct alps_fields *f,
+				   struct alps_fields *prev_f)
+{
+	struct alps_data *priv = psmouse->private;
+	int dx, dy;
+
+	if (priv->prev_phy_btn == 0 && priv->phy_btn != 0) {
+		memcpy(&priv->pt_attr[0].init_dead_pt,
+				&f->pt_img[0],
+				sizeof(struct alps_abs_data));
+	}
+
+	if (priv->pt_attr[0].init_dead_pt.x != 0 &&
+		priv->pt_attr[0].init_dead_pt.x != 0) {
+			dx = f->pt_img[0].x - priv->pt_attr[0].init_dead_pt.x;
+			dy = f->pt_img[0].y - priv->pt_attr[0].init_dead_pt.y;
+		if ((abs(dx) > V7_DEAD_ZONE_OFFSET_X) ||
+			(abs(dy) > V7_DEAD_ZONE_OFFSET_Y)) {
+				memset(&priv->pt_attr[0].init_dead_pt, 0,
+						sizeof(struct alps_abs_data));
+				priv->btn_delay_cnt = 0;
+		} else {
+			memcpy(&f->pt_img[0],
+					&prev_f->pt_img[0],
+					sizeof(struct alps_abs_data));
+			if (priv->prev_phy_btn == 0 && priv->phy_btn != 0)
+				priv->btn_delay_cnt = 2;
+		}
+	}
+
+	if (priv->btn_delay_cnt > 0) {
+		f->btn.left = 0;
+		f->btn.right = 0;
+		priv->btn_delay_cnt--;
+	}
+}
+
+static void alps_assign_buttons_v7(struct psmouse *psmouse,
+				   struct alps_fields *f,
+				   struct alps_fields *prev_f)
+{
+	struct alps_data *priv = psmouse->private;
+
+	if (priv->phy_btn) {
+		if (!priv->prev_phy_btn) {
+			/* Report a right click as long as there's finger on
+			right button zone. Othrewise, report a left click.*/
+			if (priv->r.v7.rest_right ||
+			    priv->pt_attr[0].zone & ZONE_RIGHT_BTN ||
+			    priv->pt_attr[1].zone & ZONE_RIGHT_BTN) {
+				f->btn.right = 1;
+				priv->pressed_btn_bits |= RIGHT_BUTTON_BIT;
+			} else {
+				f->btn.left = 1;
+				priv->pressed_btn_bits |= LEFT_BUTTON_BIT;
+			}
+		} else {
+			if (priv->pressed_btn_bits & RIGHT_BUTTON_BIT)
+				f->btn.right = 1;
+			if (priv->pressed_btn_bits & LEFT_BUTTON_BIT)
+				f->btn.left = 1;
+		}
+	} else {
+		priv->pressed_btn_bits = 0;
+		f->btn.right = 0;
+		f->btn.left = 0;
+	}
+
+	alps_button_dead_zone_filter(psmouse, f, prev_f);
+
+	priv->prev_phy_btn = priv->phy_btn;
+}
+
+static void alps_process_packet_v7(struct psmouse *psmouse)
+{
+	struct alps_data *priv = psmouse->private;
+	struct alps_fields f = {0};
+	static struct alps_fields prev_f;
+	unsigned char *packet = psmouse->packet;
+
+	priv->decode_fields(&f, packet, psmouse);
+
+	if (alps_drop_unsupported_packet_v7(psmouse))
+		return;
+
+	alps_set_pt_attr_v7(psmouse, &f);
+
+	alps_cal_output_finger_num_v7(psmouse, &f);
+
+	alps_assign_buttons_v7(psmouse, &f, &prev_f);
+
+	alps_report_coord_and_btn(psmouse, &f);
+
+	memcpy(&prev_f, &f, sizeof(struct alps_fields));
+}
+
 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 					unsigned char packet[],
 					bool report_buttons)
@@ -1080,6 +1492,14 @@ static psmouse_ret_t alps_process_byte(struct
psmouse *psmouse)
 		return PSMOUSE_BAD_DATA;
 	}
 
+	if ((priv->proto_version == ALPS_PROTO_V7 &&
+	    !alps_is_valid_package_v7(psmouse))) {
+		psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
+			    psmouse->pktcnt - 1,
+			    psmouse->packet[psmouse->pktcnt - 1]);
+		return PSMOUSE_BAD_DATA;
+	}
+
 	if (psmouse->pktcnt == psmouse->pktsize) {
 		priv->process_packet(psmouse);
 		return PSMOUSE_FULL_PACKET;
@@ -1192,6 +1612,22 @@ static int alps_rpt_cmd(struct psmouse *psmouse, int
init_command,
 	return 0;
 }
 
+static int alps_check_valid_firmware_id(unsigned char id[])
+{
+	int valid = 1;
+
+	if (id[0] == 0x73)
+		valid = 1;
+	else if (id[0] == 0x88) {
+		if ((id[1] == 0x07) ||
+		    (id[1] == 0x08) ||
+		    ((id[1] & 0xf0) == 0xB0))
+			valid = 1;
+	}
+
+	return valid;
+}
+
 static int alps_enter_command_mode(struct psmouse *psmouse)
 {
 	unsigned char param[4];
@@ -1201,8 +1637,7 @@ static int alps_enter_command_mode(struct psmouse
*psmouse)
 		return -1;
 	}
 
-	if ((param[0] != 0x88 || (param[1] != 0x07 && param[1] != 0x08)) &&
-	    param[0] != 0x73) {
+	if (!alps_check_valid_firmware_id(param)) {
 		psmouse_dbg(psmouse,
 			    "unknown response while entering command mode\n");
 		return -1;
@@ -1704,6 +2139,36 @@ error:
 	return ret;
 }
 
+static int alps_hw_init_v7(struct psmouse *psmouse)
+{
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	int reg_val, ret = -1;
+
+	if (alps_enter_command_mode(psmouse))
+		goto error;
+
+	reg_val = alps_command_mode_read_reg(psmouse, 0xc2d9);
+	if (reg_val == -1)
+		goto error;
+
+	if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
+		goto error;
+
+	reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
+	if (reg_val == -1)
+		goto error;
+
+	if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
+		goto error;
+
+	alps_exit_command_mode(psmouse);
+	return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
+
+error:
+	alps_exit_command_mode(psmouse);
+	return ret;
+}
+
 /* Must be in command mode when calling this function */
 static int alps_absolute_mode_v4(struct psmouse *psmouse)
 {
@@ -1875,6 +2340,7 @@ static void alps_set_defaults(struct alps_data *priv)
 		priv->set_abs_params = alps_set_abs_params_st;
 		priv->x_max = 1023;
 		priv->y_max = 767;
+		priv->slot_number = 1;
 		break;
 	case ALPS_PROTO_V3:
 		priv->hw_init = alps_hw_init_v3;
@@ -1883,6 +2349,7 @@ static void alps_set_defaults(struct alps_data *priv)
 		priv->decode_fields = alps_decode_pinnacle;
 		priv->nibble_commands = alps_v3_nibble_commands;
 		priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
+		priv->slot_number = 2;
 		break;
 	case ALPS_PROTO_V4:
 		priv->hw_init = alps_hw_init_v4;
@@ -1890,6 +2357,7 @@ static void alps_set_defaults(struct alps_data *priv)
 		priv->set_abs_params = alps_set_abs_params_mt;
 		priv->nibble_commands = alps_v4_nibble_commands;
 		priv->addr_command = PSMOUSE_CMD_DISABLE;
+		priv->slot_number = 2;
 		break;
 	case ALPS_PROTO_V5:
 		priv->hw_init = alps_hw_init_dolphin_v1;
@@ -1905,6 +2373,7 @@ static void alps_set_defaults(struct alps_data *priv)
 		priv->y_max = 660;
 		priv->x_bits = 23;
 		priv->y_bits = 12;
+		priv->slot_number = 2;
 		break;
 	case ALPS_PROTO_V6:
 		priv->hw_init = alps_hw_init_v6;
@@ -1913,6 +2382,28 @@ static void alps_set_defaults(struct alps_data
*priv)
 		priv->nibble_commands = alps_v6_nibble_commands;
 		priv->x_max = 2047;
 		priv->y_max = 1535;
+		priv->slot_number = 2;
+		break;
+	case ALPS_PROTO_V7:
+		priv->hw_init = alps_hw_init_v7;
+		priv->process_packet = alps_process_packet_v7;
+		priv->decode_fields = alps_decode_packet_v7;
+		priv->set_abs_params = alps_set_abs_params_mt;
+		priv->nibble_commands = alps_v3_nibble_commands;
+		priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
+		priv->x_max = 0xfff;
+		priv->y_max = 0x7ff;
+		priv->resting_zone_y_min = 0x654;
+		priv->byte0 = 0x48;
+		priv->mask0 = 0x48;
+		priv->flags = 0;
+		priv->slot_number = 2;
+
+		priv->phy_btn = 0;
+		priv->prev_phy_btn = 0;
+		priv->btn_delay_cnt = 0;
+		priv->pressed_btn_bits = 0;
+		memset(priv->pt_attr, 0, sizeof(priv->pt_attr[0]) * 2);
 		break;
 	}
 }
@@ -1982,6 +2473,11 @@ static int alps_identify(struct psmouse *psmouse,
struct alps_data *priv)
 			return -EIO;
 		else
 			return 0;
+	} else if (ec[0] == 0x88 && (ec[1] & 0xf0) == 0xB0) {
+		priv->proto_version = ALPS_PROTO_V7;
+		alps_set_defaults(priv);
+
+		return 0;
 	} else if (ec[0] == 0x88 && ec[1] == 0x08) {
 		priv->proto_version = ALPS_PROTO_V3;
 		alps_set_defaults(priv);
@@ -2045,7 +2541,7 @@ static void alps_set_abs_params_mt(struct alps_data
*priv,
 				   struct input_dev *dev1)
 {
 	set_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
-	input_mt_init_slots(dev1, 2, 0);
+	input_mt_init_slots(dev1, priv->slot_number, 0);
 	input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
 	input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
 
diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
index 03f88b6..dedbd27 100644
--- a/drivers/input/mouse/alps.h
+++ b/drivers/input/mouse/alps.h
@@ -18,11 +18,36 @@
 #define ALPS_PROTO_V4	4
 #define ALPS_PROTO_V5	5
 #define ALPS_PROTO_V6	6
+#define ALPS_PROTO_V7	7
+
+#define MAX_IMG_PT_NUM		5
+#define V7_IMG_PT_NUM		2
+
+#define ZONE_NORMAL				0x01
+#define ZONE_RESTING			0x02
+#define ZONE_LEFT_BTN			0x04
+#define ZONE_RIGHT_BTN			0x08
 
 #define DOLPHIN_COUNT_PER_ELECTRODE	64
 #define DOLPHIN_PROFILE_XOFFSET		8	/* x-electrode offset */
 #define DOLPHIN_PROFILE_YOFFSET		1	/* y-electrode offset */
 
+/*
+ * enum V7_PACKET_ID - defines the packet type for V7
+ * V7_PACKET_ID_IDLE: There's no finger and no button activity.
+ * V7_PACKET_ID_TWO: There's one or two non-resting fingers on touchpad
+ *  or there's button activities.
+ * V7_PACKET_ID_MULTI: There are at least three non-resting fingers.
+ * V7_PACKET_ID_NEW: The finger position in slot is not continues from
+ *  previous packet.
+*/
+enum V7_PACKET_ID {
+	 V7_PACKET_ID_IDLE,
+	 V7_PACKET_ID_TWO,
+	 V7_PACKET_ID_MULTI,
+	 V7_PACKET_ID_NEW,
+};
+
 /**
  * struct alps_model_info - touchpad ID table
  * @signature: E7 response string to match.
@@ -66,15 +91,7 @@ struct alps_nibble_commands {
 };
 
 /**
- * struct alps_fields - decoded version of the report packet
- * @x_map: Bitmap of active X positions for MT.
- * @y_map: Bitmap of active Y positions for MT.
- * @fingers: Number of fingers for MT.
- * @x: X position for ST.
- * @y: Y position for ST.
- * @z: Z position for ST.
- * @first_mp: Packet is the first of a multi-packet report.
- * @is_mp: Packet is part of a multi-packet report.
+ * struct alps_btn - decoded version of the button status
  * @left: Left touchpad button is active.
  * @right: Right touchpad button is active.
  * @middle: Middle touchpad button is active.
@@ -82,16 +99,7 @@ struct alps_nibble_commands {
  * @ts_right: Right trackstick button is active.
  * @ts_middle: Middle trackstick button is active.
  */
-struct alps_fields {
-	unsigned int x_map;
-	unsigned int y_map;
-	unsigned int fingers;
-	unsigned int x;
-	unsigned int y;
-	unsigned int z;
-	unsigned int first_mp:1;
-	unsigned int is_mp:1;
-
+struct alps_btn {
 	unsigned int left:1;
 	unsigned int right:1;
 	unsigned int middle:1;
@@ -102,6 +110,73 @@ struct alps_fields {
 };
 
 /**
+ * struct alps_btn - decoded version of the X Y Z postion for ST.
+ * @x: X position for ST.
+ * @y: Y position for ST.
+ * @z: Z position for ST.
+ */
+struct alps_abs_data {
+	unsigned int x;
+	unsigned int y;
+	unsigned int z;
+};
+
+/**
+ * struct alps_fields - decoded version of the report packet
+ * @fingers: Number of fingers for MT.
+ * @pt: X Y Z postion for ST.
+ * @pt: X Y Z postion for image MT.
+ * @x_map: Bitmap of active X positions for MT.
+ * @y_map: Bitmap of active Y positions for MT.
+ * @first_mp: Packet is the first of a multi-packet report.
+ * @is_mp: Packet is part of a multi-packet report.
+ * @btn: Button activity status
+ */
+struct alps_fields {
+	unsigned int fingers;
+	struct alps_abs_data pt;
+	struct alps_abs_data pt_img[MAX_IMG_PT_NUM];
+	unsigned int x_map;
+	unsigned int y_map;
+	unsigned int first_mp:1;
+	unsigned int is_mp:1;
+	struct alps_btn btn;
+};
+
+/**
+ * struct v7_raw - data decoded from raw packet for V7.
+ * @pkt_id: An id that specifies the type of packet.
+ * @additional_fingers: Number of additional finger that is neighter
included
+ *  in pt slot nor reflected in rest_left and rest_right flag of data
packet.
+ * @rest_left: There are fingers on left resting zone.
+ * @rest_right: There are fingers on right resting zone.
+ * @raw_fn: The number of finger on touchpad.
+ */
+struct v7_raw {
+	unsigned char pkt_id;
+	unsigned int additional_fingers;
+	unsigned char rest_left;
+	unsigned char rest_right;
+	unsigned char raw_fn;
+};
+
+/**
+ * struct alps_bl_pt_attr - generic attributes of touch points for
buttonless device
+ * @zone: The part of touchpad that the touch point locates
+ * @is_counted: The touch point is not a resting finger.
+ * @is_init_pt_got: The touch down point is got.
+ * @init_pt: The X Y Z position of the touch down point.
+ * @init_dead_pt: The touch down point of a finger used by dead zone
process.
+ */
+struct alps_bl_pt_attr {
+	unsigned char zone;
+	unsigned char is_counted;
+	unsigned char is_init_pt_got;
+	struct alps_abs_data init_pt;
+	struct alps_abs_data init_dead_pt;
+};
+
+/**
  * struct alps_data - private data structure for the ALPS driver
  * @dev2: "Relative" device used to report trackstick or mouse activity.
  * @phys: Physical path for the relative device.
@@ -116,8 +191,10 @@ struct alps_fields {
  * @flags: Additional device capabilities (passthrough port, trackstick,
etc.).
  * @x_max: Largest possible X position value.
  * @y_max: Largest possible Y position value.
+ * @resting_zone_y_min: Smallest Y postion value of the bottom resting
zone.
  * @x_bits: Number of X bits in the MT bitmap.
  * @y_bits: Number of Y bits in the MT bitmap.
+ * @img_fingers: Number of image fingers.
  * @hw_init: Protocol-specific hardware init function.
  * @process_packet: Protocol-specific function to process a report packet.
  * @decode_fields: Protocol-specific function to read packet bitfields.
@@ -132,6 +209,11 @@ struct alps_fields {
  * @fingers: Number of fingers from last MT report.
  * @quirks: Bitmap of ALPS_QUIRK_*.
  * @timer: Timer for flushing out the final report packet in the stream.
+ * @v7: Data decoded from raw packet for V7
+ * @phy_btn: Physical button is active.
+ * @prev_phy_btn: Physical button of previous packet is active.
+ * @pressed_btn_bits: Pressed positon of button zone
+ * @pt_attr: Generic attributes of touch points for buttonless device.
  */
 struct alps_data {
 	struct input_dev *dev2;
@@ -145,8 +227,10 @@ struct alps_data {
 	unsigned char flags;
 	int x_max;
 	int y_max;
+	int resting_zone_y_min;
 	int x_bits;
 	int y_bits;
+	unsigned char slot_number;
 
 	int (*hw_init)(struct psmouse *psmouse);
 	void (*process_packet)(struct psmouse *psmouse);
@@ -161,6 +245,16 @@ struct alps_data {
 	int fingers;
 	u8 quirks;
 	struct timer_list timer;
+
+	/* these are used for buttonless touchpad*/
+	union {
+		struct v7_raw v7;
+	} r;
+	unsigned char phy_btn;
+	unsigned char prev_phy_btn;
+	unsigned char btn_delay_cnt;
+	unsigned char pressed_btn_bits;
+	struct alps_bl_pt_attr pt_attr[MAX_IMG_PT_NUM];
 };
 
 #define ALPS_QUIRK_TRACKSTICK_BUTTONS	1 /* trakcstick buttons in
trackstick packet */
-- 
1.8.3.2

--