Alps source code update

Commit Message

Masaki Ota Oct. 23, 2014, 10:21 p.m. UTC

Signed-off-by: Masaki Ota <[e-mail]>
- Support Alps Button-less Touchpad device(Rushmore and SS4). New device type and a data decode logic were added.
---
 drivers/input/mouse/alps.c | 1680 +++++++++++++++++++++++++++++++++++---------
 drivers/input/mouse/alps.h |  263 ++++++-
 2 files changed, 1574 insertions(+), 369 deletions(-)

Comments

Niels de Vos Oct. 24, 2014, 7:18 a.m. UTC | #1

On Fri, Oct 24, 2014 at 06:21:23AM +0800, Masaki Ota wrote:
> Signed-off-by: Masaki Ota <[e-mail]>
> - Support Alps Button-less Touchpad device(Rushmore and SS4). New device type and a data decode logic were added.

Thanks Masaki. I can't say much about the change to the alps driver
itself, but you should probably re-post this patch with a more suitable
subject and description of the change. The format would be something
like this (this text may not be correct though, it's just an example):


    [PATCH v2] input/alps: support for button-less touchpads

    Add support for Alps button-less touchpads (Rushmore and SS4). These
    devices use a different protocol, so additional decoding routines
    are added.

    These devices are found in <some laptop vendor/model(s)>.

    Signed-off-by: ...
    Reviewed-by: ... (maybe one of your colleagues?)
    Tested-by: ... (maybe one of your colleagues?)

    ---
    v2 changes:
    - reformat commit message

    <patch follows below>


Now, this is quite a big patch. It will be easier for others to review
and check your change if you can split it up in multiple logical
patches. For example, add the v8 protocol and the supported device(s) in
the 1st patch, and the v9 protocol in a 2nd one.

If you can include some laptop vendor/model(s) in the message for the
commit, we can see if there are any bugs filed in the Red Hat Bugzilla
for these. Maybe there are some users that want to do some testing and
can offer feedback.

Thanks,
Niels


> ---
>  drivers/input/mouse/alps.c | 1680 +++++++++++++++++++++++++++++++++++---------
>  drivers/input/mouse/alps.h |  263 ++++++-
>  2 files changed, 1574 insertions(+), 369 deletions(-)
> 
> diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
> index a59a1a6..d4fc568 100644
> --- a/drivers/input/mouse/alps.c
> +++ b/drivers/input/mouse/alps.c
> @@ -20,6 +20,7 @@
>  #include <linux/input/mt.h>
>  #include <linux/serio.h>
>  #include <linux/libps2.h>
> +#include <linux/kernel.h>
>  
>  #include "psmouse.h"
>  #include "alps.h"
> @@ -32,6 +33,8 @@
>  #define ALPS_REG_BASE_RUSHMORE	0xc2c0
>  #define ALPS_REG_BASE_PINNACLE	0x0000
>  
> +#define V7_LARGE_MOVEMENT		130
> +
>  static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
>  	{ PSMOUSE_CMD_SETPOLL,		0x00 }, /* 0 */
>  	{ PSMOUSE_CMD_RESET_DIS,	0x00 }, /* 1 */
> @@ -99,8 +102,10 @@ 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_IS_RUSHMORE	0x100	/* device is a rushmore */
> -#define ALPS_BUTTONPAD		0x200	/* device is a clickpad */
> +#define ALPS_BTNLESS			0x100	/* ALPS ClickPad flag */
> +
> +#define	DOL_IS_APDATA(_BY)			((_BY[0]&0x01) == 0x01)
> +#define	DOL_IS_PROFDATA(_BY)		((_BY[0]&0x20) == 0x20)
>  
>  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 */
> @@ -142,6 +147,20 @@ 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,
> @@ -283,10 +302,11 @@ static void alps_process_packet_v1_v2(struct psmouse *psmouse)
>   *
>   * The bitmaps don't have enough data to track fingers, so this function
>   * only generates points representing a bounding box of at most two contacts.
> - * These two points are returned in fields->mt.
> + * These two points are returned in x1, y1, x2, and y2.
>   */
>  static void alps_process_bitmap_dolphin(struct alps_data *priv,
> -					struct alps_fields *fields)
> +					struct alps_fields *fields,
> +					int *x1, int *y1, int *x2, int *y2)
>  {
>  	int box_middle_x, box_middle_y;
>  	unsigned int x_map, y_map;
> @@ -309,6 +329,8 @@ static void alps_process_bitmap_dolphin(struct alps_data *priv,
>  	if (x_msb > priv->x_bits || y_msb > priv->y_bits)
>  		return;
>  
> +	*x1 = *y1 = *x2 = *y2 = 0;
> +
>  	if (fields->fingers > 1) {
>  		start_bit = priv->x_bits - x_msb;
>  		end_bit = priv->x_bits - x_lsb;
> @@ -319,35 +341,10 @@ 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));
> -		fields->mt[0] = fields->st;
> -		fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
> -		fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
> -	}
> -}
> -
> -static void alps_get_bitmap_points(unsigned int map,
> -				   struct alps_bitmap_point *low,
> -				   struct alps_bitmap_point *high,
> -				   int *fingers)
> -{
> -	struct alps_bitmap_point *point;
> -	int i, bit, prev_bit = 0;
> -
> -	point = low;
> -	for (i = 0; map != 0; i++, map >>= 1) {
> -		bit = map & 1;
> -		if (bit) {
> -			if (!prev_bit) {
> -				point->start_bit = i;
> -				point->num_bits = 0;
> -				(*fingers)++;
> -			}
> -			point->num_bits++;
> -		} else {
> -			if (prev_bit)
> -				point = high;
> -		}
> -		prev_bit = bit;
> +		*x1 = fields->pt.x;
> +		*y1 = fields->pt.y;
> +		*x2 = 2 * box_middle_x - *x1;
> +		*y2 = 2 * box_middle_y - *y1;
>  	}
>  }
>  
> @@ -358,21 +355,71 @@ static void alps_get_bitmap_points(unsigned int map,
>   *
>   * The bitmaps don't have enough data to track fingers, so this function
>   * only generates points representing a bounding box of all contacts.
> - * These points are returned in fields->mt when the return value
> + * These points are returned in x1, y1, x2, and y2 when the return value
>   * is greater than 0.
>   */
>  static int alps_process_bitmap(struct alps_data *priv,
> -			       struct alps_fields *fields)
> +			       unsigned int x_map, unsigned int y_map,
> +			       int *x1, int *y1, int *x2, int *y2)
>  {
> -	int i, fingers_x = 0, fingers_y = 0, fingers;
> +	struct alps_bitmap_point {
> +		int start_bit;
> +		int num_bits;
> +	};
> +
> +	int fingers_x = 0, fingers_y = 0, fingers;
> +	int i, bit, prev_bit;
>  	struct alps_bitmap_point x_low = {0,}, x_high = {0,};
>  	struct alps_bitmap_point y_low = {0,}, y_high = {0,};
> +	struct alps_bitmap_point *point;
>  
> -	if (!fields->x_map || !fields->y_map)
> +	if (!x_map || !y_map)
>  		return 0;
>  
> -	alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
> -	alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
> +	*x1 = *y1 = *x2 = *y2 = 0;
> +
> +	prev_bit = 0;
> +	point = &x_low;
> +	for (i = 0; x_map != 0; i++, x_map >>= 1) {
> +		bit = x_map & 1;
> +		if (bit) {
> +			if (!prev_bit) {
> +				point->start_bit = i;
> +				fingers_x++;
> +			}
> +			point->num_bits++;
> +		} else {
> +			if (prev_bit)
> +				point = &x_high;
> +			else
> +				point->num_bits = 0;
> +		}
> +		prev_bit = bit;
> +	}
> +
> +	/*
> +	 * y bitmap is reversed for what we need (lower positions are in
> +	 * higher bits), so we process from the top end.
> +	 */
> +	y_map = y_map << (sizeof(y_map) * BITS_PER_BYTE - priv->y_bits);
> +	prev_bit = 0;
> +	point = &y_low;
> +	for (i = 0; y_map != 0; i++, y_map <<= 1) {
> +		bit = y_map & (1 << (sizeof(y_map) * BITS_PER_BYTE - 1));
> +		if (bit) {
> +			if (!prev_bit) {
> +				point->start_bit = i;
> +				fingers_y++;
> +			}
> +			point->num_bits++;
> +		} else {
> +			if (prev_bit)
> +				point = &y_high;
> +			else
> +				point->num_bits = 0;
> +		}
> +		prev_bit = bit;
> +	}
>  
>  	/*
>  	 * Fingers can overlap, so we use the maximum count of fingers
> @@ -381,89 +428,103 @@ static int alps_process_bitmap(struct alps_data *priv,
>  	fingers = max(fingers_x, fingers_y);
>  
>  	/*
> -	 * If an axis reports only a single contact, we have overlapping or
> -	 * adjacent fingers. Divide the single contact between the two points.
> +	 * If total fingers is > 1 but either axis reports only a single
> +	 * contact, we have overlapping or adjacent fingers. For the
> +	 * purposes of creating a bounding box, divide the single contact
> +	 * (roughly) equally between the two points.
>  	 */
> -	if (fingers_x == 1) {
> -		i = (x_low.num_bits - 1) / 2;
> -		x_low.num_bits = x_low.num_bits - i;
> -		x_high.start_bit = x_low.start_bit + i;
> -		x_high.num_bits = max(i, 1);
> -	}
> -	if (fingers_y == 1) {
> -		i = (y_low.num_bits - 1) / 2;
> -		y_low.num_bits = y_low.num_bits - i;
> -		y_high.start_bit = y_low.start_bit + i;
> -		y_high.num_bits = max(i, 1);
> -	}
> -
> -	fields->mt[0].x =
> -		(priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
> -		(2 * (priv->x_bits - 1));
> -	fields->mt[0].y =
> -		(priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
> -		(2 * (priv->y_bits - 1));
> -
> -	fields->mt[1].x =
> -		(priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
> -		(2 * (priv->x_bits - 1));
> -	fields->mt[1].y =
> -		(priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
> -		(2 * (priv->y_bits - 1));
> -
> -	/* y-bitmap order is reversed, except on rushmore */
> -	if (!(priv->flags & ALPS_IS_RUSHMORE)) {
> -		fields->mt[0].y = priv->y_max - fields->mt[0].y;
> -		fields->mt[1].y = priv->y_max - fields->mt[1].y;
> +	if (fingers > 1) {
> +		if (fingers_x == 1) {
> +			i = x_low.num_bits / 2;
> +			x_low.num_bits = x_low.num_bits - i;
> +			x_high.start_bit = x_low.start_bit + i;
> +			x_high.num_bits = max(i, 1);
> +		} else if (fingers_y == 1) {
> +			i = y_low.num_bits / 2;
> +			y_low.num_bits = y_low.num_bits - i;
> +			y_high.start_bit = y_low.start_bit + i;
> +			y_high.num_bits = max(i, 1);
> +		}
> +	}
> +
> +	*x1 = (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
> +	      (2 * (priv->x_bits - 1));
> +	*y1 = (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
> +	      (2 * (priv->y_bits - 1));
> +
> +	if (fingers > 1) {
> +		*x2 = (priv->x_max *
> +		       (2 * x_high.start_bit + x_high.num_bits - 1)) /
> +		      (2 * (priv->x_bits - 1));
> +		*y2 = (priv->y_max *
> +		       (2 * y_high.start_bit + y_high.num_bits - 1)) /
> +		      (2 * (priv->y_bits - 1));
>  	}
>  
>  	return fingers;
>  }
>  
> -static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
> +static void alps_set_slot(struct input_dev *dev, int slot, bool active,
> +			  int x, int y)
>  {
>  	input_mt_slot(dev, slot);
> -	input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
> -	input_report_abs(dev, ABS_MT_POSITION_X, x);
> -	input_report_abs(dev, ABS_MT_POSITION_Y, y);
> +	input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
> +	if (active) {
> +		input_report_abs(dev, ABS_MT_POSITION_X, x);
> +		input_report_abs(dev, ABS_MT_POSITION_Y, y);
> +	}
>  }
>  
> -static void alps_report_mt_data(struct psmouse *psmouse, int n)
> +static void alps_report_semi_mt_data(struct input_dev *dev, int num_fingers,
> +				     int x1, int y1, int x2, int y2)
>  {
> -	struct alps_data *priv = psmouse->private;
> -	struct input_dev *dev = psmouse->dev;
> -	struct alps_fields *f = &priv->f;
> -	int i, slot[MAX_TOUCHES];
> +	alps_set_slot(dev, 0, num_fingers != 0, x1, y1);
> +	alps_set_slot(dev, 1, num_fingers == 2, x2, y2);
> +}
>  
> -	input_mt_assign_slots(dev, slot, f->mt, n);
> -	for (i = 0; i < n; i++)
> -		alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
> +static void alps_report_semi_mt_data_ex(struct input_dev *dev, int num_fingers,
> +				     struct alps_abs_data coord[])
> +{
> +	unsigned char i;
>  
> -	input_mt_sync_frame(dev);
> +	for (i = 0; i < num_fingers; i++) {
> +		if (!coord[i].x || !coord[i].y || !coord[i].z)
> +			alps_set_slot(dev, i, 0, coord[i].x, coord[i].y);
> +		else
> +			alps_set_slot(dev, i, 1, coord[i].x, coord[i].y);
> +	}
>  }
>  
> -static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
> +static void alps_report_coord_and_btn(struct psmouse *psmouse,
> +				      struct alps_fields *f)
>  {
> -	struct alps_data *priv = psmouse->private;
> -	struct input_dev *dev = psmouse->dev;
> -	struct alps_fields *f = &priv->f;
> +	struct input_dev *dev;
>  
> -	/* Use st data when we don't have mt data */
> -	if (fingers < 2) {
> -		f->mt[0].x = f->st.x;
> -		f->mt[0].y = f->st.y;
> -		fingers = f->pressure > 0 ? 1 : 0;
> -	}
> +	if (!psmouse || !f)
> +		return;
>  
> -	alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
> +	dev = psmouse->dev;
>  
> -	input_mt_report_finger_count(dev, fingers);
> +	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_key(dev, BTN_LEFT, f->left);
> -	input_report_key(dev, BTN_RIGHT, f->right);
> -	input_report_key(dev, BTN_MIDDLE, f->middle);
> +		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_abs(dev, ABS_PRESSURE, f->pressure);
> +	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);
>  
>  	input_sync(dev);
>  }
> @@ -530,16 +591,25 @@ 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 int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
> +/* proto_v9 */
> +static void alps_decode_button_ss3(struct alps_fields *f, unsigned char *p,
> +				struct alps_data *priv)
> +{
> +	if (f->dol_packet_type == DOL_GPDATA ||
> +		f->dol_packet_type == DOL_APDATA)
> +		f->btn.left = !!(p[3]&0x01);
> +}
> +
> +static void alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
>  				 struct psmouse *psmouse)
>  {
>  	f->first_mp = !!(p[4] & 0x40);
> @@ -553,17 +623,15 @@ static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
>  		   ((p[2] & 0x7f) << 1) |
>  		   (p[4] & 0x01);
>  
> -	f->st.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->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
> -	f->pressure = 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);
> -
> -	return 0;
>  }
>  
> -static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
> +static void alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
>  				 struct psmouse *psmouse)
>  {
>  	alps_decode_pinnacle(f, p, psmouse);
> @@ -573,25 +641,20 @@ static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
>  	f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
>  	f->x_map |= (p[5] & 0x10) << 11;
>  	f->y_map |= (p[5] & 0x20) << 6;
> -
> -	return 0;
>  }
>  
> -static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
> +static void alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
>  				struct psmouse *psmouse)
>  {
>  	u64 palm_data = 0;
>  	struct alps_data *priv = psmouse->private;
>  
> -	f->first_mp = !!(p[0] & 0x02);
> -	f->is_mp = !!(p[0] & 0x20);
> +	f->is_mp = 0;
> +	f->first_mp = 0;
>  
> -	if (!f->is_mp) {
> -		f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
> -		f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
> -		f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
> -		alps_decode_buttons_v3(f, p);
> -	} else {
> +	if (DOL_IS_PROFDATA(p)) {
> +		f->is_mp = 1;
> +		f->dol_packet_type = DOL_PROFDATA;
>  		f->fingers = ((p[0] & 0x6) >> 1 |
>  		     (p[0] & 0x10) >> 2);
>  
> @@ -609,22 +672,415 @@ static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
>  		/* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
>  		f->x_map = (palm_data >> priv->y_bits) &
>  			   (BIT(priv->x_bits) - 1);
> +	} else {
> +		if (DOL_IS_APDATA(p)) {
> +			f->dol_packet_type = DOL_APDATA;
> +			f->fingers = 2;
> +			f->pt_img[0].x = p[1]<<3;
> +			f->pt_img[0].y = p[2]<<2;
> +			f->pt_img[0].z = 64;
> +			f->pt_img[1].x = p[4]<<3;
> +			f->pt_img[1].y = p[5]<<2;
> +			f->pt_img[1].z = 64;
> +		} else {/* is gp data */
> +			f->dol_packet_type = DOL_GPDATA;
> +			f->first_mp = !!(p[0]&0x02);
> +			f->pt.x = f->pt_img[0].x =
> +				((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
> +			f->pt.y = f->pt_img[0].y =
> +				((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
> +			f->pt.z = f->pt_img[0].z =
> +				min(((p[0] & 0x04) ? 0 : p[5] & 0x7f) * 2, 127);
> +
> +			/*
> +				Button number will be included in
> +				the PROFILE data for a 3-f packet.
> +				So do not change .fingers because
> +				it will be updated in Profile data packet.
> +			*/
> +			if (!f->first_mp)
> +				f->fingers = (f->pt_img[0].x &&
> +					f->pt_img[0].y && f->pt_img[0].z)?1:0;
> +		}
> +
> +		if (priv->proto_version == ALPS_PROTO_V9)
> +			alps_decode_button_ss3(f, p, priv);
> +		else
> +			alps_decode_buttons_v3(f, p);
>  	}
> +}
>  
> -	return 0;
> +unsigned char alps_get_pkt_id_ss4_v1(char *byte)
> +{
> +	unsigned char pkt_id = SS4_PACKET_ID_IDLE;
> +
> +	if (((byte[0] & 0xFF) == 0x08) && ((byte[1] & 0xFF) == 0x10) &&
> +	     ((byte[2] & 0xFF) == 0x00) && ((byte[3] & 0x8F) == 0x08) &&
> +	     ((byte[4] & 0xFF) == 0x01) && ((byte[5] & 0xFF) == 0x00)) {
> +		pkt_id = SS4_PACKET_ID_IDLE;
> +	} else if (((byte[0] & 0x08) == 0x08) && ((byte[1] & 0x10) == 0x10) &&
> +		((byte[3] & 0x8E) == 0x08) && ((byte[4] & 0x81) == 0x01)) {
> +		pkt_id = SS4_PACKET_ID_ONE;
> +	} else if (((byte[0] & 0x08) == 0x08) && ((byte[3] & 0x08) == 0x08) &&
> +		  ((byte[4] & 0x01) == 0x01)) {
> +		if (((byte[5] & 0x01) == 0x01))
> +			pkt_id = SS4_PACKET_ID_TWO;
> +		else
> +			pkt_id = SS4_PACKET_ID_MULTI;
> +	}
> +
> +	return pkt_id;
> +}
> +
> +unsigned char alps_get_pkt_id_ss4_v2(char *byte)
> +{
> +	unsigned char pkt_id = SS4_PACKET_ID_IDLE;
> +
> +	if (((byte[0] & 0xFF) == 0x18) && ((byte[1] & 0xFF) == 0x10) &&
> +	     ((byte[2] & 0xFF) == 0x00) && ((byte[3] & 0x88) == 0x08) &&
> +	     ((byte[4] & 0xFF) == 0x10) && ((byte[5] & 0xFF) == 0x00)) {
> +		pkt_id = SS4_PACKET_ID_IDLE;
> +	} else if (!(byte[3] & 0x10)) {
> +		pkt_id = SS4_PACKET_ID_ONE;
> +	} else {
> +		if (!(byte[3] & 0x20))
> +			pkt_id = SS4_PACKET_ID_TWO;
> +		else
> +			pkt_id = SS4_PACKET_ID_MULTI;
> +	}
> +
> +	return pkt_id;
> +}
> +
> +static void alps_process_btnless_click(struct psmouse *psmouse,
> +				struct alps_fields *f)
> +{
> +	struct alps_data *priv = psmouse->private;
> +
> +	if (!f->btn.left)
> +		return;
> +
> +	/* Clear button flag */
> +	f->btn.left = 0;
> +
> +	switch (f->fingers) {
> +	case 1:
> +		/* In Left Resting Area */
> +		if (PT_IN_LEFT_BTN_AREA(f->pt_img[0].x,
> +				f->pt_img[0].y, priv->x_max, priv->y_max)) {
> +			f->btn.left = 1;
> +		} else if (PT_IN_RIGHT_BTN_AREA(f->pt_img[0].x,
> +				f->pt_img[0].y, priv->x_max, priv->y_max)) {
> +			/* In Right Resting Area */
> +			f->btn.right = 1;
> +		} else {
> +			/* In Normal area */
> +			f->btn.left = 1;
> +		}
> +		break;
> +
> +	case 2:
> +		/* Both two fingers are in Normal area */
> +		if (!PT_IN_BTN_AREA(f->pt_img[0].x,
> +				f->pt_img[0].y, priv->x_max, priv->y_max) &&
> +				!PT_IN_BTN_AREA(f->pt_img[1].x,
> +				f->pt_img[1].y, priv->x_max, priv->y_max)) {
> +			f->btn.right = 1;
> +		} else if (PT_IN_RIGHT_BTN_AREA(f->pt_img[0].x,
> +				f->pt_img[0].y, priv->x_max, priv->y_max) ||
> +				PT_IN_RIGHT_BTN_AREA(f->pt_img[1].x,
> +				f->pt_img[1].y, priv->x_max, priv->y_max)) {
> +			/* Either one finger is in Right Area */
> +			f->btn.right = 1;
> +		} else {
> +			f->btn.left = 1;
> +		}
> +		break;
> +
> +	case 3:
> +		f->btn.middle = 1;
> +		break;
> +
> +	case 0:
> +	default:
> +		break;
> +	}
> +}
> +
> +static void alps_process_resting_finger(struct psmouse *psmouse,
> +	struct alps_fields *f, struct alps_abs_data *output,
> +	unsigned char *p_fn)
> +{
> +	struct alps_data *priv = psmouse->private;
> +	static struct alps_abs_data prev_pt[10];
> +	static struct alps_abs_data init_pt[10];
> +	static unsigned char is_moved[10];
> +	static unsigned char prev_fn;
> +	static unsigned char prev_coord_is_output[10];
> +	unsigned char cur_coord_is_output[10];
> +	unsigned char in_resting_area[10];
> +	unsigned char i, index;
> +	unsigned char output_fn = 0;
> +
> +	memset(in_resting_area, 0, sizeof(in_resting_area));
> +	memset(cur_coord_is_output, 0, sizeof(cur_coord_is_output));
> +
> +	/* Clear "is_moved" flag when finger number changed */
> +	if (f->fingers != prev_fn) {
> +		memset(is_moved, 0, sizeof(is_moved));
> +		memcpy(init_pt, f->pt_img, sizeof(f->pt_img));
> +	}
> +
> +	/* Calculate output finger */
> +	for (i = 0, index = 0; i < f->fingers; i++) {
> +		if (is_moved[i] == 0 &&
> +			(abs(f->pt_img[i].x - init_pt[i].x)
> +				> RESTING_FN_LARGE_MOVEMENT)) {
> +			is_moved[i] = 1;
> +		}
> +
> +		/* Check if in resting area */
> +		if (PT_IN_BTN_AREA(f->pt_img[i].x,
> +				f->pt_img[i].y, priv->x_max, priv->y_max))
> +			in_resting_area[i] = 1;
> +
> +		if (!in_resting_area[i] ||
> +			(in_resting_area[i] && is_moved[i])) {
> +			memcpy(&output[index++], &f->pt_img[i],
> +				sizeof(struct alps_abs_data));
> +			cur_coord_is_output[i] = 1;
> +			output_fn++;
> +		}
> +	}
> +
> +	/* A normal finger becomes a resting finger */
> +	for (i = 0; i < f->fingers; i++) {
> +		if (prev_coord_is_output[i] &&
> +			!cur_coord_is_output[i] && f->pt_img[i].z) {
> +			output_fn = 0;
> +			memset(output, 0,
> +				sizeof(struct alps_abs_data)*f->fingers);
> +		}
> +	}
> +
> +	memcpy(prev_pt, f->pt_img, sizeof(f->pt_img));
> +	memcpy(prev_coord_is_output, cur_coord_is_output,
> +		sizeof(cur_coord_is_output));
> +	prev_fn = f->fingers;
> +	*p_fn = output_fn;
> +}
> +
> +static void alps_decode_ss4_v1(struct alps_fields *f,
> +			unsigned char *p, struct psmouse *psmouse)
> +{
> +	struct alps_data *priv = psmouse->private;
> +	unsigned char pkt_id;
> +	unsigned int no_data_x, no_data_y;
> +
> +	if (!psmouse || !f || !p)
> +		return;
> +
> +	pkt_id = alps_get_pkt_id_ss4_v1(p);
> +
> +	/* Current packet is 1Finger coordinate packet */
> +	switch (pkt_id) {
> +	case SS4_PACKET_ID_ONE:
> +		f->pt_img[0].x = SS4_1F_X_V1(p);
> +		f->pt_img[0].y = SS4_1F_Y_V1(p);
> +		/* Keep Z-value in 0-127 */
> +		f->pt_img[0].z = min(((SS4_1F_Z_V1(p)) * 2), 127);
> +		f->large_fn |= SS4_1F_LFB(p) ? 0x01 : 0x00;
> +		f->fingers = 1;
> +		f->first_mp = 0;
> +		f->is_mp = 0;
> +		break;
> +
> +	case SS4_PACKET_ID_TWO:
> +		if (priv->flags & ALPS_BTNLESS) {
> +			f->pt_img[0].x = SS4_BTL_MF_X_V1(p, 0);
> +			f->pt_img[0].y = SS4_BTL_MF_Y_V1(p, 0);
> +			f->pt_img[1].x = SS4_BTL_MF_X_V1(p, 1);
> +			f->pt_img[1].y = SS4_BTL_MF_Y_V1(p, 1);
> +		} else {
> +			f->pt_img[0].x = SS4_STD_MF_X_V1(p, 0);
> +			f->pt_img[0].y = SS4_STD_MF_Y_V1(p, 0);
> +			f->pt_img[1].x = SS4_STD_MF_X_V1(p, 1);
> +			f->pt_img[1].y = SS4_STD_MF_Y_V1(p, 1);
> +		}
> +		f->pt_img[0].z = SS4_MF_Z_V1(p, 0) ? 0x30 : 0;
> +		f->pt_img[1].z = SS4_MF_Z_V1(p, 1) ? 0x30 : 0;
> +
> +		if (SS4_IS_MF_CONTINUE_V1(p)) {
> +			f->first_mp = 1;
> +		} else {
> +			f->fingers = 2;
> +			f->first_mp = 0;
> +		}
> +		f->is_mp = 0;
> +
> +		break;
> +
> +	case SS4_PACKET_ID_MULTI:
> +		if (priv->flags & ALPS_BTNLESS) {
> +			f->pt_img[2].x = SS4_BTL_MF_X_V1(p, 0);
> +			f->pt_img[2].y = SS4_BTL_MF_Y_V1(p, 0);
> +			f->pt_img[3].x = SS4_BTL_MF_X_V1(p, 1);
> +			f->pt_img[3].y = SS4_BTL_MF_Y_V1(p, 1);
> +			no_data_x = SS4_MFPACKET_NO_AX_BL;
> +			no_data_y = SS4_MFPACKET_NO_AY_BL;
> +		} else {
> +			f->pt_img[2].x = SS4_STD_MF_X_V1(p, 0);
> +			f->pt_img[2].y = SS4_STD_MF_Y_V1(p, 0);
> +			f->pt_img[3].x = SS4_STD_MF_X_V1(p, 1);
> +			f->pt_img[3].y = SS4_STD_MF_Y_V1(p, 1);
> +			no_data_x = SS4_MFPACKET_NO_AX;
> +			no_data_y = SS4_MFPACKET_NO_AY;
> +		}
> +		f->pt_img[2].z = SS4_MF_Z_V1(p, 0) ? 0x30 : 0;
> +		f->pt_img[3].z = SS4_MF_Z_V1(p, 1) ? 0x30 : 0;
> +
> +		f->first_mp = 0;
> +		f->is_mp = 1;
> +
> +		if (SS4_IS_5F_DETECTED_V1(p)) {
> +			f->fingers = 5;
> +		} else if (f->pt_img[3].x == no_data_x &&
> +			     f->pt_img[3].y == no_data_y) {
> +			f->fingers = 3;
> +			f->pt_img[3].x = 0;
> +			f->pt_img[3].y = 0;
> +			f->pt_img[3].z = 0;
> +		} else {
> +			f->fingers = 4;
> +		}
> +		break;
> +
> +	case SS4_PACKET_ID_IDLE:
> +	default:
> +		memset(f, 0, sizeof(struct alps_fields));
> +		break;
> +	}
> +
> +	f->btn.left = !!(SS4_BTN_V1(p) & 0x01);
> +	if (!(priv->flags & ALPS_BTNLESS)) {
> +		f->btn.right = !!(SS4_BTN_V1(p) & 0x02);
> +		f->btn.middle = !!(SS4_BTN_V1(p) & 0x04);
> +	}
> +}
> +
> +static void alps_decode_ss4_v2(struct alps_fields *f,
> +			unsigned char *p, struct psmouse *psmouse)
> +{
> +	struct alps_data *priv = psmouse->private;
> +	unsigned char pkt_id;
> +	unsigned int no_data_x, no_data_y;
> +
> +	if (!psmouse || !f || !p)
> +		return;
> +
> +	pkt_id = alps_get_pkt_id_ss4_v2(p);
> +
> +	/* Current packet is 1Finger coordinate packet */
> +	switch (pkt_id) {
> +	case SS4_PACKET_ID_ONE:
> +		f->pt_img[0].x = SS4_1F_X_V2(p);
> +		f->pt_img[0].y = SS4_1F_Y_V2(p);
> +		/* Keep Z-value in 0-127 */
> +		f->pt_img[0].z = min(((SS4_1F_Z_V2(p)) * 2), 127);
> +		f->large_fn |= SS4_1F_LFB_V2(p) ? 0x01 : 0x00;
> +		f->fingers = 1;
> +		f->first_mp = 0;
> +		f->is_mp = 0;
> +		break;
> +
> +	case SS4_PACKET_ID_TWO:
> +		if (priv->flags & ALPS_BTNLESS) {
> +			f->pt_img[0].x = SS4_BTL_MF_X_V2(p, 0);
> +			f->pt_img[0].y = SS4_BTL_MF_Y_V2(p, 0);
> +			f->pt_img[1].x = SS4_BTL_MF_X_V2(p, 1);
> +			f->pt_img[1].y = SS4_BTL_MF_Y_V2(p, 1);
> +		} else {
> +			f->pt_img[0].x = SS4_STD_MF_X_V2(p, 0);
> +			f->pt_img[0].y = SS4_STD_MF_Y_V2(p, 0);
> +			f->pt_img[1].x = SS4_STD_MF_X_V2(p, 1);
> +			f->pt_img[1].y = SS4_STD_MF_Y_V2(p, 1);
> +		}
> +		f->pt_img[0].z = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
> +		f->pt_img[1].z = SS4_MF_Z_V2(p, 1) ? 0x30 : 0;
> +
> +		f->large_fn |= SS4_MF_LF_V2(p, 0) ? 0x01 : 0;
> +		f->large_fn |= SS4_MF_LF_V2(p, 1) ? 0x02 : 0;
> +
> +		if (SS4_IS_MF_CONTINUE_V2(p)) {
> +			f->first_mp = 1;
> +		} else {
> +			f->fingers = 2;
> +			f->first_mp = 0;
> +		}
> +		f->is_mp = 0;
> +		break;
> +
> +	case SS4_PACKET_ID_MULTI:
> +		if (priv->flags & ALPS_BTNLESS) {
> +			f->pt_img[2].x = SS4_BTL_MF_X_V2(p, 0);
> +			f->pt_img[2].y = SS4_BTL_MF_Y_V2(p, 0);
> +			f->pt_img[3].x = SS4_BTL_MF_X_V2(p, 1);
> +			f->pt_img[3].y = SS4_BTL_MF_Y_V2(p, 1);
> +			no_data_x = SS4_MFPACKET_NO_AX_BL;
> +			no_data_y = SS4_MFPACKET_NO_AY_BL;
> +		} else {
> +			f->pt_img[2].x = SS4_STD_MF_X_V2(p, 0);
> +			f->pt_img[2].y = SS4_STD_MF_Y_V2(p, 0);
> +			f->pt_img[3].x = SS4_STD_MF_X_V2(p, 1);
> +			f->pt_img[3].y = SS4_STD_MF_Y_V2(p, 1);
> +			no_data_x = SS4_MFPACKET_NO_AX;
> +			no_data_y = SS4_MFPACKET_NO_AY;
> +		}
> +		f->pt_img[2].z = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
> +		f->pt_img[3].z = SS4_MF_Z_V2(p, 1) ? 0x30 : 0;
> +
> +		f->large_fn |= SS4_MF_LF_V2(p, 0) ? 0x04 : 0;
> +		f->large_fn |= SS4_MF_LF_V2(p, 1) ? 0x08 : 0;
> +		f->first_mp = 0;
> +		f->is_mp = 1;
> +
> +		if (SS4_IS_5F_DETECTED_V2(p)) {
> +			f->fingers = 5;
> +		} else if (f->pt_img[3].x == no_data_x &&
> +			     f->pt_img[3].y == no_data_y) {
> +			f->fingers = 3;
> +			f->pt_img[3].x = 0;
> +			f->pt_img[3].y = 0;
> +			f->pt_img[3].z = 0;
> +		} else {
> +			f->fingers = 4;
> +		}
> +		break;
> +
> +	case SS4_PACKET_ID_IDLE:
> +	default:
> +		memset(f, 0, sizeof(struct alps_fields));
> +		break;
> +	}
> +
> +	f->btn.left = !!(SS4_BTN_V2(p) & 0x01);
> +	if (!(priv->flags & ALPS_BTNLESS)) {
> +		f->btn.right = !!(SS4_BTN_V2(p) & 0x02);
> +		f->btn.middle = !!(SS4_BTN_V2(p) & 0x04);
> +	}
>  }
>  
>  static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
>  {
>  	struct alps_data *priv = psmouse->private;
>  	unsigned char *packet = psmouse->packet;
> +	struct input_dev *dev = psmouse->dev;
>  	struct input_dev *dev2 = priv->dev2;
> -	struct alps_fields *f = &priv->f;
> -	int fingers = 0;
> +	int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
> +	int fingers = 0, bmap_fn;
> +	struct alps_fields f = {0};
>  
> -	memset(f, 0, sizeof(*f));
> -
> -	priv->decode_fields(f, packet, psmouse);
> +	priv->decode_fields(&f, packet, psmouse);
>  
>  	/*
>  	 * There's no single feature of touchpad position and bitmap packets
> @@ -639,14 +1095,22 @@ static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
>  		 * packet. Check for this, and when it happens process the
>  		 * position packet as usual.
>  		 */
> -		if (f->is_mp) {
> -			fingers = f->fingers;
> +		if (f.is_mp) {
> +			fingers = f.fingers;
>  			if (priv->proto_version == ALPS_PROTO_V3) {
> -				if (alps_process_bitmap(priv, f) == 0)
> -					fingers = 0; /* Use st data */
> +				bmap_fn = alps_process_bitmap(priv, f.x_map,
> +							      f.y_map, &x1, &y1,
> +							      &x2, &y2);
> +
> +				/*
> +				 * We shouldn't report more than one finger if
> +				 * we don't have two coordinates.
> +				 */
> +				if (fingers > 1 && bmap_fn < 2)
> +					fingers = bmap_fn;
>  
>  				/* Now process position packet */
> -				priv->decode_fields(f, priv->multi_data,
> +				priv->decode_fields(&f, priv->multi_data,
>  						    psmouse);
>  			} else {
>  				/*
> @@ -655,14 +1119,15 @@ static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
>  				 * calculate Pt2, so we need to do position
>  				 * packet decode first.
>  				 */
> -				priv->decode_fields(f, priv->multi_data,
> +				priv->decode_fields(&f, priv->multi_data,
>  						    psmouse);
>  
>  				/*
>  				 * Since Dolphin's finger number is reliable,
>  				 * there is no need to compare with bmap_fn.
>  				 */
> -				alps_process_bitmap_dolphin(priv, f);
> +				alps_process_bitmap_dolphin(priv, &f, &x1, &y1,
> +					&x2, &y2);
>  			}
>  		} else {
>  			priv->multi_packet = 0;
> @@ -677,10 +1142,10 @@ static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
>  	 * out misidentified bitmap packets, we reject anything with this
>  	 * bit set.
>  	 */
> -	if (f->is_mp)
> +	if (f.is_mp)
>  		return;
>  
> -	if (!priv->multi_packet && f->first_mp) {
> +	if (!priv->multi_packet && f.first_mp) {
>  		priv->multi_packet = 1;
>  		memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
>  		return;
> @@ -694,15 +1159,44 @@ 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->st.x && f->st.y && !f->pressure)
> +	if (f.pt.x && f.pt.y && !f.pt.z)
>  		return;
>  
> -	alps_report_semi_mt_data(psmouse, fingers);
> +	/*
> +	 * If we don't have MT data or the bitmaps were empty, we have
> +	 * to rely on ST data.
> +	 */
> +	if (!fingers) {
> +		x1 = f.pt.x;
> +		y1 = f.pt.y;
> +		fingers = f.pt.z > 0 ? 1 : 0;
> +	}
> +
> +	if (f.pt.z > 0)
> +		input_report_key(dev, BTN_TOUCH, 1);
> +	else
> +		input_report_key(dev, BTN_TOUCH, 0);
> +
> +	alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
> +
> +	input_mt_report_finger_count(dev, fingers);
> +
> +	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.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.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);
>  	}
>  }
> @@ -727,6 +1221,64 @@ static void alps_process_packet_v3(struct psmouse *psmouse)
>  	alps_process_touchpad_packet_v3_v5(psmouse);
>  }
>  
> +/* proto_v9 */
> +static void alps_process_touchpad_packet_ss3(struct psmouse *psmouse)
> +{
> +	struct alps_data *priv = psmouse->private;
> +	unsigned char *packet = psmouse->packet;
> +	struct input_dev *dev = psmouse->dev;
> +	int fingers = 0;
> +	struct alps_fields f = {0};
> +	struct alps_abs_data	pt_output[2] = { {0, 0, 0}, {0, 0, 0} };
> +	unsigned char output_fn_num = 0;
> +
> +	priv->decode_fields(&f, packet, psmouse);
> +
> +	if ((!!priv->multi_packet) != (!!f.is_mp)) {
> +		priv->multi_packet = 0;
> +		return;
> +	}
> +
> +	/* When f.first_mp is 1, next packet should be a
> +	 *	bitmap packet(when there is no error).
> +	 */
> +	priv->multi_packet = f.first_mp;
> +
> +	/* Don't process any 3-f data */
> +	if (f.first_mp || f.is_mp)
> +		return;
> +
> +	/*
> +	 * If we don't have MT data or the bitmaps were empty, we have
> +	 * to rely on ST data.
> +	 */
> +	fingers = f.fingers;
> +
> +	alps_process_resting_finger(psmouse, &f, pt_output, &output_fn_num);
> +	alps_process_btnless_click(psmouse, &f);
> +
> +	if (pt_output[0].z || pt_output[1].z)
> +		input_report_key(dev, BTN_TOUCH, 1);
> +	else
> +		input_report_key(dev, BTN_TOUCH, 0);
> +
> +	alps_report_semi_mt_data_ex(dev, 2, pt_output);
> +
> +	input_mt_report_finger_count(dev, output_fn_num);
> +
> +	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 (pt_output[0].z > 0) {
> +		input_report_abs(dev, ABS_X, pt_output[0].x);
> +		input_report_abs(dev, ABS_Y, pt_output[0].y);
> +	}
> +	input_report_abs(dev, ABS_PRESSURE, pt_output[0].z ? 30 : 0);
> +
> +	input_sync(dev);
> +}
> +
>  static void alps_process_packet_v6(struct psmouse *psmouse)
>  {
>  	struct alps_data *priv = psmouse->private;
> @@ -801,8 +1353,13 @@ static void alps_process_packet_v4(struct psmouse *psmouse)
>  {
>  	struct alps_data *priv = psmouse->private;
>  	unsigned char *packet = psmouse->packet;
> -	struct alps_fields *f = &priv->f;
> +	struct input_dev *dev = psmouse->dev;
>  	int offset;
> +	int x, y, z;
> +	int left, right;
> +	int x1, y1, x2, y2;
> +	int fingers = 0;
> +	unsigned int x_bitmap, y_bitmap;
>  
>  	/*
>  	 * v4 has a 6-byte encoding for bitmap data, but this data is
> @@ -824,41 +1381,96 @@ static void alps_process_packet_v4(struct psmouse *psmouse)
>  	if (++priv->multi_packet > 2) {
>  		priv->multi_packet = 0;
>  
> -		f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
> +		x_bitmap = ((priv->multi_data[2] & 0x1f) << 10) |
>  			   ((priv->multi_data[3] & 0x60) << 3) |
>  			   ((priv->multi_data[0] & 0x3f) << 2) |
>  			   ((priv->multi_data[1] & 0x60) >> 5);
> -		f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
> +		y_bitmap = ((priv->multi_data[5] & 0x01) << 10) |
>  			   ((priv->multi_data[3] & 0x1f) << 5) |
>  			    (priv->multi_data[1] & 0x1f);
>  
> -		f->fingers = alps_process_bitmap(priv, f);
> +		fingers = alps_process_bitmap(priv, x_bitmap, y_bitmap,
> +					      &x1, &y1, &x2, &y2);
> +
> +		/* Store MT data.*/
> +		priv->fingers = fingers;
> +		priv->x1 = x1;
> +		priv->x2 = x2;
> +		priv->y1 = y1;
> +		priv->y2 = y2;
>  	}
>  
> -	f->left = packet[4] & 0x01;
> -	f->right = packet[4] & 0x02;
> +	left = packet[4] & 0x01;
> +	right = packet[4] & 0x02;
> +
> +	x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
> +	    ((packet[0] & 0x30) >> 4);
> +	y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
> +	z = packet[5] & 0x7f;
> +
> +	/*
> +	 * If there were no contacts in the bitmap, use ST
> +	 * points in MT reports.
> +	 * If there were two contacts or more, report MT data.
> +	 */
> +	if (priv->fingers < 2) {
> +		x1 = x;
> +		y1 = y;
> +		fingers = z > 0 ? 1 : 0;
> +	} else {
> +		fingers = priv->fingers;
> +		x1 = priv->x1;
> +		x2 = priv->x2;
> +		y1 = priv->y1;
> +		y2 = priv->y2;
> +	}
> +
> +	if (z >= 64)
> +		input_report_key(dev, BTN_TOUCH, 1);
> +	else
> +		input_report_key(dev, BTN_TOUCH, 0);
> +
> +	alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
> +
> +	input_mt_report_finger_count(dev, fingers);
> +
> +	input_report_key(dev, BTN_LEFT, left);
> +	input_report_key(dev, BTN_RIGHT, right);
>  
> -	f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
> -		  ((packet[0] & 0x30) >> 4);
> -	f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
> -	f->pressure = packet[5] & 0x7f;
> +	if (z > 0) {
> +		input_report_abs(dev, ABS_X, x);
> +		input_report_abs(dev, ABS_Y, y);
> +	}
> +	input_report_abs(dev, ABS_PRESSURE, z);
>  
> -	alps_report_semi_mt_data(psmouse, f->fingers);
> +	input_sync(dev);
>  }
>  
>  static bool alps_is_valid_package_v7(struct psmouse *psmouse)
>  {
> -	switch (psmouse->pktcnt) {
> -	case 3:
> -		return (psmouse->packet[2] & 0x40) == 0x40;
> -	case 4:
> -		return (psmouse->packet[3] & 0x48) == 0x48;
> -	case 6:
> -		return (psmouse->packet[5] & 0x40) == 0x00;
> -	}
> +	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;
> @@ -874,85 +1486,251 @@ static unsigned char alps_get_packet_id_v7(char *byte)
>  	else
>  		packet_id = V7_PACKET_ID_UNKNOWN;
>  
> -	return packet_id;
> +	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;
> +
> +	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;
> +	memset(&f->btn, 0, sizeof(struct alps_btn));
> +
> +	if (priv->r.v7.pkt_id == V7_PACKET_ID_TWO ||
> +	    priv->r.v7.pkt_id == V7_PACKET_ID_MULTI) {
> +
> +		if (priv->flags & ALPS_BTNLESS) {
> +			priv->r.v7.rest_left = (p[0] & 0x10) >> 4;
> +			priv->r.v7.rest_right = (p[0] & 0x20) >> 5;
> +			f->btn.middle = (p[0] & 0x80) >> 7;
> +		} else {
> +			f->btn.left = (p[0] & 0x80) >> 7;
> +			f->btn.right = (p[0] & 0x20) >> 5;
> +			f->btn.middle = (p[0] & 0x10) >> 4;
> +		}
> +	}
> +
> +	if (priv->r.v7.pkt_id == V7_PACKET_ID_MULTI)
> +		priv->r.v7.additional_fingers = p[5] & 0x03;
>  }
>  
> -static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
> -					  unsigned char *pkt,
> -					  unsigned char pkt_id)
> +static void alps_set_each_pt_attr_v7(struct psmouse *psmouse,
> +				     struct alps_abs_data *pt,
> +				     struct alps_bl_pt_attr *pt_attr)
>  {
> -	mt[0].x = ((pkt[2] & 0x80) << 4);
> -	mt[0].x |= ((pkt[2] & 0x3F) << 5);
> -	mt[0].x |= ((pkt[3] & 0x30) >> 1);
> -	mt[0].x |= (pkt[3] & 0x07);
> -	mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
> +	struct alps_data *priv = psmouse->private;
> +	unsigned int dist;
>  
> -	mt[1].x = ((pkt[3] & 0x80) << 4);
> -	mt[1].x |= ((pkt[4] & 0x80) << 3);
> -	mt[1].x |= ((pkt[4] & 0x3F) << 4);
> -	mt[1].y = ((pkt[5] & 0x80) << 3);
> -	mt[1].y |= ((pkt[5] & 0x3F) << 4);
> +	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));
> +	}
>  
> -	switch (pkt_id) {
> -	case V7_PACKET_ID_TWO:
> -		mt[1].x &= ~0x000F;
> -		mt[1].y |= 0x000F;
> -		break;
> +	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;
> +			}
> +		}
> +	}
> +}
>  
> -	case V7_PACKET_ID_MULTI:
> -		mt[1].x &= ~0x003F;
> -		mt[1].y &= ~0x0020;
> -		mt[1].y |= ((pkt[4] & 0x02) << 4);
> -		mt[1].y |= 0x001F;
> -		break;
> +static void alps_set_pt_attr_v7(struct psmouse *psmouse,
> +				       struct alps_fields *f)
> +{
> +	struct alps_data *priv = psmouse->private;
> +	int i;
>  
> -	case V7_PACKET_ID_NEW:
> -		mt[1].x &= ~0x003F;
> -		mt[1].x |= (pkt[0] & 0x20);
> -		mt[1].y |= 0x000F;
> +	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]) * V7_IMG_PT_NUM);
>  		break;
>  	}
> -
> -	mt[0].y = 0x7FF - mt[0].y;
> -	mt[1].y = 0x7FF - mt[1].y;
>  }
>  
> -static int alps_get_mt_count(struct input_mt_pos *mt)
> +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;
>  
> -	for (i = 0; i < MAX_TOUCHES && mt[i].x != 0 && mt[i].y != 0; i++)
> -		/* empty */;
> +	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;
> +	}
>  
> -	return i;
> +	f->fingers = fn;
>  }
>  
> -static int alps_decode_packet_v7(struct alps_fields *f,
> -				  unsigned char *p,
> -				  struct psmouse *psmouse)
> +static void alps_assign_buttons_v7(struct psmouse *psmouse,
> +				   struct alps_fields *f)
>  {
> -	unsigned char pkt_id;
> +	struct alps_data *priv = psmouse->private;
>  
> -	pkt_id = alps_get_packet_id_v7(p);
> -	if (pkt_id == V7_PACKET_ID_IDLE)
> -		return 0;
> -	if (pkt_id == V7_PACKET_ID_UNKNOWN)
> -		return -1;
> +	/* It's ClickPad */
> +	if (priv->flags & ALPS_BTNLESS) {
> +		if (!f->btn.middle)
> +			goto exit;
> +
> +		f->btn.middle = 0;
> +		if (priv->prev_btn.left || priv->prev_btn.middle ||
> +			priv->prev_btn.right) {
> +			memcpy(&f->btn, &priv->prev_btn,
> +				sizeof(struct alps_btn));
> +			goto exit;
> +		}
>  
> -	alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
> +		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;
> +		} else {
> +			f->btn.left = 1;
> +		}
>  
> -	if (pkt_id == V7_PACKET_ID_TWO || pkt_id == V7_PACKET_ID_MULTI) {
> -		f->left = (p[0] & 0x80) >> 7;
> -		f->right = (p[0] & 0x20) >> 5;
> -		f->middle = (p[0] & 0x10) >> 4;
> +		goto exit;
>  	}
>  
> -	if (pkt_id == V7_PACKET_ID_TWO)
> -		f->fingers = alps_get_mt_count(f->mt);
> -	else if (pkt_id == V7_PACKET_ID_MULTI)
> -		f->fingers = 3 + (p[5] & 0x03);
> +	/* It's Standard, do nothing */
>  
> -	return 0;
> +exit:
> +	memcpy(&priv->prev_btn, &f->btn, sizeof(struct alps_btn));
>  }
>  
>  static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
> @@ -962,21 +1740,9 @@ static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
>  	struct input_dev *dev2 = priv->dev2;
>  	int x, y, z, left, right, middle;
>  
> -	/*
> -	 *        b7 b6 b5 b4 b3 b2 b1 b0
> -	 * Byte0   0  1  0  0  1  0  0  0
> -	 * Byte1   1  1  *  *  1  M  R  L
> -	 * Byte2  X7  1 X5 X4 X3 X2 X1 X0
> -	 * Byte3  Z6  1 Y6 X6  1 Y2 Y1 Y0
> -	 * Byte4  Y7  0 Y5 Y4 Y3  1  1  0
> -	 * Byte5 T&P  0 Z5 Z4 Z3 Z2 Z1 Z0
> -	 * M / R / L: Middle / Right / Left button
> -	 */
> -
> -	x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
> -	y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
> -	    ((packet[3] & 0x20) << 1);
> -	z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
> +	x = ((packet[2] & 0xBF)) | ((packet[3] & 0x10) << 2);
> +	y = (packet[3] & 0x03) | (packet[4] & 0xB8) | ((packet[3] & 0x20) << 1);
> +	z = (packet[5] & 0x3F) | ((packet[3] & 0x80) >> 1);
>  
>  	left = (packet[1] & 0x01);
>  	right = (packet[1] & 0x02) >> 1;
> @@ -996,35 +1762,115 @@ static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
>  static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
>  {
>  	struct alps_data *priv = psmouse->private;
> -	struct input_dev *dev = psmouse->dev;
> -	struct alps_fields *f = &priv->f;
> +	struct alps_fields f = {0};
> +	unsigned char *packet = psmouse->packet;
>  
> -	memset(f, 0, sizeof(*f));
> +	priv->decode_fields(&f, packet, psmouse);
>  
> -	if (priv->decode_fields(f, psmouse->packet, psmouse))
> +	if (alps_drop_unsupported_packet_v7(psmouse))
>  		return;
>  
> -	alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
> +	alps_set_pt_attr_v7(psmouse, &f);
>  
> -	input_mt_report_finger_count(dev, f->fingers);
> +	alps_cal_output_finger_num_v7(psmouse, &f);
>  
> -	input_report_key(dev, BTN_LEFT, f->left);
> -	input_report_key(dev, BTN_RIGHT, f->right);
> -	input_report_key(dev, BTN_MIDDLE, f->middle);
> +	alps_assign_buttons_v7(psmouse, &f);
>  
> -	input_sync(dev);
> +	alps_report_coord_and_btn(psmouse, &f);
>  }
>  
>  static void alps_process_packet_v7(struct psmouse *psmouse)
>  {
>  	unsigned char *packet = psmouse->packet;
>  
> -	if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
> +	if ((packet[0] == 0x48) && ((packet[4] & 0x47) == 0x06))
>  		alps_process_trackstick_packet_v7(psmouse);
>  	else
>  		alps_process_touchpad_packet_v7(psmouse);
>  }
>  
> +static void alps_process_packet_ss4(struct psmouse *psmouse)
> +{
> +	struct alps_data *priv = psmouse->private;
> +	unsigned char *packet = psmouse->packet;
> +	struct input_dev *dev = psmouse->dev;
> +	struct alps_fields f;
> +	struct alps_abs_data output_data[5];
> +	unsigned char output_fn;
> +
> +	memset(&f, 0, sizeof(struct alps_fields));
> +	priv->decode_fields(&f, packet, psmouse);
> +
> +	if (priv->multi_packet) {
> +		/*
> +		 * Sometimes the first packet will indicate a multi-packet
> +		 * sequence, but sometimes the next multi-packet would not come.
> +		 * Check for this, and when it happens process the
> +		 * position packet as usual.
> +		 */
> +		if (f.is_mp) {
> +			/* Now process the 1st packet */
> +			priv->decode_fields(&f, priv->multi_data, psmouse);
> +		} else {
> +			priv->multi_packet = 0;
> +		}
> +	}
> +
> +	/*
> +	 * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
> +	 * When it is set, it means 2nd packet comes without 1st packet come.
> +	 */
> +	if (f.is_mp)
> +		return;
> +
> +	/* Save the first packet */
> +	if (!priv->multi_packet && f.first_mp) {
> +		priv->multi_packet = 1;
> +		memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
> +		return;
> +	}
> +
> +	priv->multi_packet = 0;
> +
> +	/* Set "output_data" and "output_fn" */
> +	memset(&output_data[0], 0, sizeof(output_data));
> +	if (priv->flags & ALPS_BTNLESS) {
> +		alps_process_resting_finger(psmouse, &f,
> +			output_data, &output_fn);
> +		alps_process_btnless_click(psmouse, &f);
> +	} else {
> +		memcpy(&output_data[0], &f.pt_img[0],
> +			sizeof(struct alps_abs_data) * f.fingers);
> +		output_fn = f.fingers;
> +	}
> +
> +	f.pt.x = output_data[0].x;
> +	f.pt.y = output_data[0].y;
> +	f.pt.z = output_data[0].z;
> +
> +	if (output_data[0].z || output_data[1].z ||
> +		output_data[2].z || output_data[3].z)
> +		input_report_key(dev, BTN_TOUCH, 1);
> +	else
> +		input_report_key(dev, BTN_TOUCH, 0);
> +
> +	alps_report_semi_mt_data_ex(dev, 4, output_data);
> +
> +	input_mt_report_finger_count(dev, output_fn);
> +
> +	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.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.pt.z);
> +
> +	input_sync(dev);
> +}
> +
>  static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
>  					unsigned char packet[],
>  					bool report_buttons)
> @@ -1152,11 +1998,22 @@ static void alps_flush_packet(unsigned long data)
>  	serio_continue_rx(psmouse->ps2dev.serio);
>  }
>  
> +static bool alps_is_valid_package_ss4(struct psmouse *psmouse)
> +{
> +	if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
> +		return false;
> +	if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
> +		return false;
> +	return true;
> +}
> +
>  static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
>  {
>  	struct alps_data *priv = psmouse->private;
>  
> -	if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
> +	/* Can not distinguish V8's first byte from PS/2 packet's */
> +	if ((psmouse->packet[0] & 0xc8) == 0x08 &&
> +			priv->proto_version != ALPS_PROTO_V8) {
>  		if (psmouse->pktcnt == 3) {
>  			alps_report_bare_ps2_packet(psmouse, psmouse->packet,
>  						    true);
> @@ -1189,8 +2046,10 @@ 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)) {
> +	if ((priv->proto_version == ALPS_PROTO_V7 &&
> +		!alps_is_valid_package_v7(psmouse)) ||
> +		(priv->proto_version == ALPS_PROTO_V8 &&
> +		!alps_is_valid_package_ss4(psmouse))) {
>  		psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
>  			    psmouse->pktcnt - 1,
>  			    psmouse->packet[psmouse->pktcnt - 1]);
> @@ -1309,20 +2168,20 @@ static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
>  	return 0;
>  }
>  
> -static bool alps_check_valid_firmware_id(unsigned char id[])
> +static int alps_check_valid_firmware_id(unsigned char id[])
>  {
> -	if (id[0] == 0x73)
> -		return true;
> +	int valid = 1;
>  
> -	if (id[0] == 0x88 &&
> -	    (id[1] == 0x07 ||
> -	     id[1] == 0x08 ||
> -	     (id[1] & 0xf0) == 0xb0 ||
> -	     (id[1] & 0xf0) == 0xc0)) {
> -		return true;
> +	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 false;
> +	return valid;
>  }
>  
>  static int alps_enter_command_mode(struct psmouse *psmouse)
> @@ -1792,45 +2651,6 @@ error:
>  	return -1;
>  }
>  
> -static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
> -{
> -	int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
> -	struct alps_data *priv = psmouse->private;
> -
> -	reg = alps_command_mode_read_reg(psmouse, reg_pitch);
> -	if (reg < 0)
> -		return reg;
> -
> -	x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
> -	x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
> -
> -	y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
> -	y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
> -
> -	reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
> -	if (reg < 0)
> -		return reg;
> -
> -	x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
> -	x_electrode = 17 + x_electrode;
> -
> -	y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
> -	y_electrode = 13 + y_electrode;
> -
> -	x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
> -	y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
> -
> -	priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
> -	priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
> -
> -	psmouse_dbg(psmouse,
> -		    "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
> -		    x_pitch, y_pitch, x_electrode, y_electrode,
> -		    x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
> -
> -	return 0;
> -}
> -
>  static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
>  {
>  	struct alps_data *priv = psmouse->private;
> @@ -1851,9 +2671,6 @@ static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
>  	    alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
>  		goto error;
>  
> -	if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
> -		goto error;
> -
>  	reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
>  	if (reg_val == -1)
>  		goto error;
> @@ -1878,6 +2695,32 @@ 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) ||
> +	    alps_command_mode_read_reg(psmouse, 0xc2d9) == -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)
>  {
> @@ -1967,6 +2810,102 @@ error:
>  	return -1;
>  }
>  
> +static int alps_get_otp_values_ss4(struct psmouse *psmouse,
> +	unsigned char index, unsigned char otp[])
> +{
> +	struct ps2dev *ps2dev = &psmouse->ps2dev;
> +
> +	switch (index) {
> +	case 0:
> +		if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
> +		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
> +		    ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
> +			return -1;
> +
> +		break;
> +
> +	case 1:
> +		if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
> +		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
> +		    ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
> +			return -1;
> +
> +		break;
> +	}
> +
> +	return 0;
> +}
> +
> +int alps_update_device_area_ss4_v1(
> +	unsigned char otp[][4], struct alps_data *priv)
> +{
> +	int	num_x_electrode;
> +	int	num_y_electrode;
> +
> +	num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0]		& 0x0F);
> +	num_y_electrode = ((otp[1][0] >> 4)	& 0x0F);
> +
> +	priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
> +	priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
> +
> +	return 0;
> +}
> +
> +int alps_update_device_area_ss4_v2(
> +	unsigned char otp[][4], struct alps_data *priv)
> +{
> +	int	num_x_electrode;
> +	int	num_y_electrode;
> +
> +	num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
> +	if ((priv->fw_ver[1] > 2) ||
> +		(priv->fw_ver[1] == 2 && priv->fw_ver[2] > 0x33)) {
> +		num_y_electrode =
> +			SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x07);
> +	} else {
> +		num_y_electrode = ((otp[1][0] >> 4) & 0x0F);
> +	}
> +
> +	priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
> +	priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
> +
> +	return 0;
> +}
> +
> +int alps_update_btn_info_ss4(unsigned char otp[][4], struct alps_data *priv)
> +{
> +
> +	unsigned char is_btnless = 0;
> +
> +	is_btnless = (otp[1][1] >> 3) &  0x01;
> +
> +	if (is_btnless)
> +		priv->flags |= ALPS_BTNLESS;
> +
> +	return 0;
> +}
> +
> +static int alps_set_defaults_ss4(struct psmouse *psmouse,
> +					struct alps_data *priv)
> +{
> +	unsigned char otp[2][4];
> +
> +	memset(otp, 0, sizeof(otp));
> +
> +	if (alps_get_otp_values_ss4(psmouse, 0, &otp[0][0]) ||
> +	    alps_get_otp_values_ss4(psmouse, 1, &otp[1][0]))
> +		return -1;
> +
> +	if (priv->fw_ver[1] >= 2)
> +		alps_update_device_area_ss4_v2(otp, priv);
> +	else
> +		alps_update_device_area_ss4_v1(otp, priv);
> +
> +	alps_update_btn_info_ss4(otp, priv);
> +
> +	return 0;
> +}
> +
>  static int alps_dolphin_get_device_area(struct psmouse *psmouse,
>  					struct alps_data *priv)
>  {
> @@ -2030,28 +2969,54 @@ static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
>  	return 0;
>  }
>  
> -static int alps_hw_init_v7(struct psmouse *psmouse)
> +static int alps_hw_init_ss3(struct psmouse *psmouse)
>  {
>  	struct ps2dev *ps2dev = &psmouse->ps2dev;
> -	int reg_val, ret = -1;
> +	unsigned char	f3param0 = 0x00,
> +					f3param1 = 0x00;
>  
> -	if (alps_enter_command_mode(psmouse) ||
> -	    alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
> +	if (alps_enter_command_mode(psmouse))
>  		goto error;
>  
> -	if (alps_get_v3_v7_resolution(psmouse, 0xc397))
> +	/* Set to 2 pt-mode */
> +	f3param0 = 0x50;
> +	f3param1 = 0x3c;
> +	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
> +	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
> +	    ps2_command(ps2dev, &f3param0, PSMOUSE_CMD_SETRATE) ||
> +	    ps2_command(ps2dev, &f3param1, PSMOUSE_CMD_SETRATE))
>  		goto error;
>  
> -	if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
> -		goto error;
> +	/* output APDATA when 1 finger is in resting area */
> +	f3param0 = 0xc8;
> +	f3param1 = 0x28;
> +	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
> +	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
> +	    ps2_command(ps2dev, &f3param0, PSMOUSE_CMD_SETRATE) ||
> +	    ps2_command(ps2dev, &f3param1, PSMOUSE_CMD_SETRATE))
> +			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))
> +	return 0;
> +
> +error:
> +	return -1;
> +}
> +
> +
> +static int alps_hw_init_ss4(struct psmouse *psmouse)
> +{
> +	struct ps2dev *ps2dev = &psmouse->ps2dev;
> +	char param[2] = {0x64, 0x28};
> +	int ret = -1;
> +
> +	/* enter absolute mode */
> +	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
> +	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
> +	    ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
> +	    ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
>  		goto error;
> +	}
>  
> -	alps_exit_command_mode(psmouse);
>  	return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
>  
>  error:
> @@ -2078,6 +3043,7 @@ 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;
> @@ -2086,6 +3052,7 @@ 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;
> @@ -2093,6 +3060,7 @@ 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;
> @@ -2108,6 +3076,7 @@ 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;
> @@ -2116,6 +3085,7 @@ 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 = 1;
>  		break;
>  	case ALPS_PROTO_V7:
>  		priv->hw_init = alps_hw_init_v7;
> @@ -2129,8 +3099,44 @@ static void alps_set_defaults(struct alps_data *priv)
>  		priv->byte0 = 0x48;
>  		priv->mask0 = 0x48;
>  
> -		if (priv->fw_ver[1] != 0xba)
> -			priv->flags |= ALPS_BUTTONPAD;
> +		if (priv->fw_ver[1] == 0xBA) {
> +			priv->flags = 0;
> +			/* No resting finger area */
> +			priv->resting_zone_y_min = priv->y_max;
> +		} else {
> +			priv->flags = ALPS_BTNLESS;
> +			priv->resting_zone_y_min = 0x654;
> +		}
> +
> +		priv->slot_number = 2;
> +		break;
> +	case ALPS_PROTO_V8:
> +		if (priv->fw_ver[1] >= 2)
> +			priv->decode_fields = alps_decode_ss4_v2;
> +		else
> +			priv->decode_fields = alps_decode_ss4_v1;
> +
> +		priv->hw_init = alps_hw_init_ss4;
> +		priv->process_packet = alps_process_packet_ss4;
> +		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->byte0 = 0x18;
> +		priv->mask0 = 0x18;
> +		priv->flags = 0;
> +		priv->slot_number = 4;
> +		break;
> +	case ALPS_PROTO_V9:
> +		priv->hw_init = alps_hw_init_ss3;
> +		priv->process_packet = alps_process_touchpad_packet_ss3;
> +		priv->decode_fields = alps_decode_dolphin;
> +		priv->set_abs_params = alps_set_abs_params_mt;
> +		priv->nibble_commands = alps_v3_nibble_commands;
> +		priv->byte0 = 0xc8;
> +		priv->mask0 = 0xc8;
> +		priv->slot_number = 2;
>  		break;
>  	}
>  }
> @@ -2204,7 +3210,7 @@ static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
>  		else
>  			return 0;
>  	} else if (ec[0] == 0x88 &&
> -		   ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
> +		((ec[1] & 0xf0) == 0xB0 || (ec[1] & 0xf0) == 0xC0)) {
>  		priv->proto_version = ALPS_PROTO_V7;
>  		alps_set_defaults(priv);
>  
> @@ -2217,7 +3223,6 @@ static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
>  		priv->decode_fields = alps_decode_rushmore;
>  		priv->x_bits = 16;
>  		priv->y_bits = 12;
> -		priv->flags |= ALPS_IS_RUSHMORE;
>  
>  		/* hack to make addr_command, nibble_command available */
>  		psmouse->private = priv;
> @@ -2232,6 +3237,22 @@ static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
>  		alps_set_defaults(priv);
>  
>  		return 0;
> +	} else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x14) {
> +		priv->proto_version = ALPS_PROTO_V8;
> +		alps_set_defaults(priv);
> +
> +		if (alps_set_defaults_ss4(psmouse, priv))
> +			return -EIO;
> +
> +		return 0;
> +	} else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0xc8) {
> +		priv->proto_version = ALPS_PROTO_V9;
> +		alps_set_defaults(priv);
> +
> +		if (alps_dolphin_get_device_area(psmouse, priv))
> +			return -EIO;
> +
> +		return 0;
>  	}
>  
>  	psmouse_info(psmouse,
> @@ -2272,21 +3293,17 @@ static void alps_set_abs_params_st(struct alps_data *priv,
>  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, 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);
>  
> -	input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
> -	input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
> -
> -	input_mt_init_slots(dev1, MAX_TOUCHES, INPUT_MT_POINTER |
> -		INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
> -
> +	set_bit(BTN_TOOL_DOUBLETAP, dev1->keybit);
>  	set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
>  	set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
>  
> -	/* V7 is real multi-touch */
> -	if (priv->proto_version == ALPS_PROTO_V7)
> -		clear_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
> +	input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
> +	input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
>  }
>  
>  int alps_init(struct psmouse *psmouse)
> @@ -2332,9 +3349,7 @@ int alps_init(struct psmouse *psmouse)
>  	dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
>  
>  	priv->set_abs_params(priv, dev1);
> -	/* No pressure on V7 */
> -	if (priv->proto_version != ALPS_PROTO_V7)
> -		input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
> +	input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
>  
>  	if (priv->flags & ALPS_WHEEL) {
>  		dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
> @@ -2351,14 +3366,12 @@ int alps_init(struct psmouse *psmouse)
>  		dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
>  		dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
>  		dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
> -	} else if (priv->flags & ALPS_BUTTONPAD) {
> -		set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
> -		clear_bit(BTN_RIGHT, dev1->keybit);
>  	} else {
>  		dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
>  	}
>  
> -	snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
> +	snprintf(priv->phys, sizeof(priv->phys),
> +		"%s/input1", psmouse->ps2dev.serio->phys);
>  	dev2->phys = priv->phys;
>  	dev2->name = (priv->flags & ALPS_DUALPOINT) ?
>  		     "DualPoint Stick" : "ALPS PS/2 Device";
> @@ -2382,7 +3395,8 @@ int alps_init(struct psmouse *psmouse)
>  	psmouse->reconnect = alps_reconnect;
>  	psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
>  
> -	/* We are having trouble resyncing ALPS touchpads so disable it for now */
> +	/* We are having trouble resyncing ALPS touchpads
> +		so disable it for now */
>  	psmouse->resync_time = 0;
>  
>  	return 0;
> diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
> index 66240b4..55f5193 100644
> --- a/drivers/input/mouse/alps.h
> +++ b/drivers/input/mouse/alps.h
> @@ -12,8 +12,6 @@
>  #ifndef _ALPS_H
>  #define _ALPS_H
>  
> -#include <linux/input/mt.h>
> -
>  #define ALPS_PROTO_V1	1
>  #define ALPS_PROTO_V2	2
>  #define ALPS_PROTO_V3	3
> @@ -21,8 +19,17 @@
>  #define ALPS_PROTO_V5	5
>  #define ALPS_PROTO_V6	6
>  #define ALPS_PROTO_V7	7	/* t3btl t4s */
> +#define ALPS_PROTO_V8	8	/* ss4 */
> +#define ALPS_PROTO_V9	9	/* ss3btl */
> +
> +
> +#define MAX_IMG_PT_NUM		5
> +#define V7_IMG_PT_NUM		2
>  
> -#define MAX_TOUCHES	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 */
> @@ -45,6 +52,124 @@ enum V7_PACKET_ID {
>  	 V7_PACKET_ID_UNKNOWN,
>  };
>  
> +enum SS4_PACKET_ID {
> +	SS4_PACKET_ID_IDLE = 0,
> +	SS4_PACKET_ID_ONE,
> +	SS4_PACKET_ID_TWO,
> +	SS4_PACKET_ID_MULTI,
> +};
> +
> +#define SS4_COUNT_PER_ELECTRODE			256
> +#define SS4_NUMSENSOR_XOFFSET			7
> +#define SS4_NUMSENSOR_YOFFSET			7
> +
> +/* SWC status( 0:SW OFF, 1: SW ON) */
> +#define SS4_BUTTONLESS_BUTTONS	0x01
> +
> +#define SS4_MASK_NORMAL_BUTTONS	0x07
> +
> +#define SS4_1F_X_V1(_b)	(((_b[0] << 5) & 0x1E00) | \
> +		((_b[0] << 6) & 0x01C0) | \
> +		((_b[1] >> 2) & 0x0038) | \
> +		((_b[1] >> 1) & 0x0007) \
> +		)
> +
> +#define SS4_1F_Y_V1(_b)	(((_b[2] >> 1) & 0x007F) | \
> +		((_b[4] << 5) & 0x0F80) \
> +		)
> +
> +#define SS4_1F_Z_V1(_b)		(_b[5] & 0xFF)
> +
> +#define	SS4_1F_LFB(_b)		((_b[4] >> 1) & 0x01)
> +
> +#define SS4_BTN_V1(_b)		(_b[3] & SS4_BUTTONLESS_BUTTONS)
> +
> +#define SS4_STD_MF_X_V1(_b, _i)	(((_b[0 + _i * 3] >> 2) & 0x0020) | \
> +		((_b[1 + _i * 3] << 5) & 0x1FC0) \
> +		)
> +
> +#define SS4_STD_MF_Y_V1(_b, _i)	(((_b[0 + _i * 3] >> 2) & 0x0010) | \
> +		((_b[2 + _i * 3] << 4) & 0x0FE0) \
> +		)
> +
> +#define SS4_BTL_BTN_V1(_b)		(_b[3] & SS4_BUTTONLESS_BUTTONS)
> +
> +#define SS4_BTL_MF_X_V1(_b, _i) (SS4_STD_MF_X_V1(_b, _i) | \
> +		((_b[0 + _i * 3] << 2) & 0x0010))
> +
> +#define SS4_BTL_MF_Y_V1(_b, _i) (SS4_STD_MF_Y_V1(_b, _i) | \
> +		((_b[0 + _i * 3] << 2) & 0x0008))
> +
> +#define SS4_MF_Z_V1(_b, _i)		((_b[0 + _i * 3] >> 4) & 0x0003)
> +
> +#define SS4_IS_MF_CONTINUE_V1(_b)	((_b[0] & 0x01) == 0x01)
> +#define SS4_IS_5F_DETECTED_V1(_b)	((_b[0] & 0x01) == 0x01)
> +
> +#define SS4_1F_X_V2(_b)	((_b[0] & 0x0007) | \
> +		((_b[1] << 3) & 0x0078) | \
> +		((_b[1] << 2) & 0x0380) | \
> +		((_b[2] << 5) & 0x1C00) \
> +		)
> +
> +#define SS4_1F_Y_V2(_b)	(((_b[2]) & 0x000F) | \
> +		((_b[3] >> 2) & 0x0030) | \
> +		((_b[4] << 6) & 0x03C0) | \
> +		((_b[4] << 5) & 0x0C00) \
> +		)
> +
> +#define SS4_1F_Z_V2(_b)	(((_b[5]) & 0x0F) | \
> +		((_b[5] >> 1) & 0x70) | \
> +		((_b[4]) & 0x80) \
> +		)
> +
> +#define	SS4_1F_LFB_V2(_b)	(((_b[2] >> 4) & 0x01) == 0x01)
> +
> +#define	SS4_MF_LF_V2(_b, _i)	((_b[1 + _i * 3] & 0x0004) == 0x0004)
> +
> +#define SS4_BTN_V2(_b)		((_b[0] >> 5) & SS4_MASK_NORMAL_BUTTONS)
> +
> +#define SS4_STD_MF_X_V2(_b, _i)	(((_b[0 + _i * 3]  << 5) & 0x00E0) | \
> +		((_b[1 + _i * 3]  << 5) & 0x1F00) \
> +		)
> +
> +#define SS4_STD_MF_Y_V2(_b, _i)	(((_b[1 + _i * 3] << 3) & 0x0010) | \
> +		((_b[2 + _i * 3] << 5) & 0x01E0) | \
> +		((_b[2 + _i * 3] << 4) & 0x0E00) \
> +		)
> +
> +#define SS4_BTL_MF_X_V2(_b, _i)	(SS4_STD_MF_X_V2(_b, _i) | \
> +		((_b[0 + _i * 3] >> 3) & 0x0010))
> +
> +#define SS4_BTL_MF_Y_V2(_b, _i)	(SS4_STD_MF_Y_V2(_b, _i) | \
> +		((_b[0 + _i * 3] >> 3) & 0x0008))
> +
> +#define SS4_MF_Z_V2(_b, _i)	(((_b[1 + _i * 3]) & 0x0001) | \
> +		((_b[1 + _i * 3] >> 1) & 0x0002) \
> +		)
> +
> +#define SS4_IS_MF_CONTINUE_V2(_b)	((_b[2] & 0x10) == 0x10)
> +#define SS4_IS_5F_DETECTED_V2(_b)	((_b[2] & 0x10) == 0x10)
> +
> +
> +#define SS4_MFPACKET_NO_AX		8160	/* X-Coordinate value */
> +#define SS4_MFPACKET_NO_AY		4080	/* Y-Coordinate value */
> +#define SS4_MFPACKET_NO_AX_BL	8176	/* Buttonless X-Coordinate value */
> +#define SS4_MFPACKET_NO_AY_BL	4088	/* Buttonless Y-Coordinate value */
> +
> +/* Threshold for resting finger's large movement */
> +#define RESTING_FN_LARGE_MOVEMENT	50
> +
> +#define PT_IN_LEFT_BTN_AREA(_x, _y, _x_max, _y_max)
> +		(((_x) < (_x_max)/2) && ((_y) > (_y_max)*4/5))
> +
> +#define PT_IN_RIGHT_BTN_AREA(_x, _y, _x_max, _y_max)
> +		(((_x) >= (_x_max)/2) && ((_y) > (_y_max)*4/5))
> +
> +#define PT_IN_BTN_AREA(_x, _y, _x_max, _y_max)
> +		(PT_IN_LEFT_BTN_AREA(_x, _y, _x_max, _y_max) ||
> +		PT_IN_RIGHT_BTN_AREA(_x, _y, _x_max, _y_max)
> +		)
> +
>  /**
>   * struct alps_model_info - touchpad ID table
>   * @signature: E7 response string to match.
> @@ -68,7 +193,7 @@ struct alps_model_info {
>  	unsigned char command_mode_resp;
>  	unsigned char proto_version;
>  	unsigned char byte0, mask0;
> -	int flags;
> +	unsigned int flags;
>  };
>  
>  /**
> @@ -87,47 +212,95 @@ struct alps_nibble_commands {
>  	unsigned char data;
>  };
>  
> -struct alps_bitmap_point {
> -	int start_bit;
> -	int num_bits;
> +/**
> + * 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.
> + * @ts_left: Left trackstick button is active.
> + * @ts_right: Right trackstick button is active.
> + * @ts_middle: Middle trackstick button is active.
> + */
> +struct alps_btn {
> +	unsigned int left:1;
> +	unsigned int right:1;
> +	unsigned int middle:1;
> +
> +	unsigned int ts_left:1;
> +	unsigned int ts_right:1;
> +	unsigned int ts_middle:1;
> +};
> +
> +/**
> + * 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;
> +};
> +
> +enum dol_Packet {
> +	DOL_UNKNOWN,
> +	DOL_GPDATA,
> +	DOL_PROFDATA,
> +	DOL_APDATA
>  };
>  
>  /**
>   * 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.
> - * @fingers: Number of fingers for MT.
> - * @pressure: Pressure.
> - * @st: position for ST.
> - * @mt: position for MT.
>   * @first_mp: Packet is the first of a multi-packet report.
>   * @is_mp: Packet is part of a multi-packet report.
> - * @left: Left touchpad button is active.
> - * @right: Right touchpad button is active.
> - * @middle: Middle touchpad button is active.
> - * @ts_left: Left trackstick button is active.
> - * @ts_right: Right trackstick button is active.
> - * @ts_middle: Middle trackstick button is active.
> + * @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 fingers;
> -
> -	int pressure;
> -	struct input_mt_pos st;
> -	struct input_mt_pos mt[MAX_TOUCHES];
> -
> +	unsigned int large_fn;
>  	unsigned int first_mp:1;
>  	unsigned int is_mp:1;
> +	enum dol_Packet	dol_packet_type;
> +	struct alps_btn btn;
> +};
>  
> -	unsigned int left:1;
> -	unsigned int right:1;
> -	unsigned int middle:1;
> +/**
> + * 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.
> + */
> +struct v7_raw {
> +	unsigned char pkt_id;
> +	unsigned int additional_fingers;
> +	unsigned char rest_left;
> +	unsigned char rest_right;
> +};
>  
> -	unsigned int ts_left:1;
> -	unsigned int ts_right:1;
> -	unsigned int ts_middle:1;
> +/**
> + * 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.
> + */
> +struct alps_bl_pt_attr {
> +	unsigned char zone;
> +	unsigned char is_counted;
> +	unsigned char is_init_pt_got;
> +	struct alps_abs_data init_pt;
>  };
>  
>  /**
> @@ -142,12 +315,13 @@ struct alps_fields {
>   *   known format for this model.  The first byte of the report, ANDed with
>   *   mask0, should match byte0.
>   * @mask0: The mask used to check the first byte of the report.
> - * @fw_ver: cached copy of firmware version (EC report)
>   * @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.
> @@ -155,9 +329,18 @@ struct alps_fields {
>   * @prev_fin: Finger bit from previous packet.
>   * @multi_packet: Multi-packet data in progress.
>   * @multi_data: Saved multi-packet data.
> - * @f: Decoded packet data fields.
> + * @x1: First X coordinate from last MT report.
> + * @x2: Second X coordinate from last MT report.
> + * @y1: First Y coordinate from last MT report.
> + * @y2: Second Y coordinate from last MT report.
> + * @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;
> @@ -168,27 +351,35 @@ struct alps_data {
>  	int addr_command;
>  	unsigned char proto_version;
>  	unsigned char byte0, mask0;
> +	unsigned int flags;
>  	unsigned char fw_ver[3];
> -	int flags;
>  	int x_max;
>  	int y_max;
> +	int resting_zone_y_min;
>  	int x_bits;
>  	int y_bits;
> -	unsigned int x_res;
> -	unsigned int y_res;
> +	unsigned char slot_number;
>  
>  	int (*hw_init)(struct psmouse *psmouse);
>  	void (*process_packet)(struct psmouse *psmouse);
> -	int (*decode_fields)(struct alps_fields *f, unsigned char *p,
> +	void (*decode_fields)(struct alps_fields *f, unsigned char *p,
>  			      struct psmouse *psmouse);
>  	void (*set_abs_params)(struct alps_data *priv, struct input_dev *dev1);
>  
>  	int prev_fin;
>  	int multi_packet;
>  	unsigned char multi_data[6];
> -	struct alps_fields f;
> +	int x1, x2, y1, y2;
> +	int fingers;
>  	u8 quirks;
>  	struct timer_list timer;
> +
> +	/* these are used for buttonless touchpad*/
> +	union {
> +		struct v7_raw v7;
> +	} r;
> +	struct alps_btn prev_btn;
> +	struct alps_bl_pt_attr pt_attr[MAX_IMG_PT_NUM];
>  };
>  
>  #define ALPS_QUIRK_TRACKSTICK_BUTTONS	1 /* trakcstick buttons in trackstick packet */
> -- 
> 1.9.1
> 
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Andreas Bosch Oct. 24, 2014, 8:03 a.m. UTC | #2

Am 24.10.2014 um 00:21 schrieb Masaki Ota:
> Signed-off-by: Masaki Ota <[e-mail]>
> - Support Alps Button-less Touchpad device(Rushmore and SS4). New device type and a data decode logic were added.
> ---
>   drivers/input/mouse/alps.c | 1680 +++++++++++++++++++++++++++++++++++---------
>   drivers/input/mouse/alps.h |  263 ++++++-
>   2 files changed, 1574 insertions(+), 369 deletions(-)
Hello,

This patch is reversing changes introduced in commit 
02d04254a5dfb8de1459805c3433cd0e9e4853d7 (Input: alps - use struct 
input_mt_pos to track coordinates), maybe some others, too. Is this 
deliberate?

These are two examples of that.
> [...]
>
>    * The bitmaps don't have enough data to track fingers, so this function
>    * only generates points representing a bounding box of at most two contacts.
> - * These two points are returned in fields->mt.
> + * These two points are returned in x1, y1, x2, and y2.
>    */
>   static void alps_process_bitmap_dolphin(struct alps_data *priv,
> -					struct alps_fields *fields)
> +					struct alps_fields *fields,
> +					int *x1, int *y1, int *x2, int *y2)
>   {
>   	int box_middle_x, box_middle_y;
>   	unsigned int x_map, y_map;
> @@ -309,6 +329,8 @@ static void alps_process_bitmap_dolphin(struct alps_data *priv,
>   	if (x_msb > priv->x_bits || y_msb > priv->y_bits)
>   		return;
> [...]
>
and
> [...]
>
> @@ -168,27 +351,35 @@ struct alps_data {
>   	int addr_command;
>
> [...]
>
> -	struct alps_fields f;
> +	int x1, x2, y1, y2;
> +	int fingers;
>   	u8 quirks;
>   	struct timer_list timer;
> [...]
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Masaki Ota Oct. 27, 2014, 10:28 a.m. UTC | #3

Hi, Niels,

Thank you for reply.
I will split this modification and post it again.

Best Regards,
================================
Masaki Ota
Alps Electric Co., Ltd.
Engineering Dept.M8
Tel:[phone] ext:522
Fax:[phone]
E-mail  [e-mail]
================================

Ben Gamari May 17, 2016, 9:33 a.m. UTC | #4

Masaki Ota <[e-mail]> writes:

> Hi, Niels,
>
> Thank you for reply.
> I will split this modification and post it again.
>
Masaki,

What is the status of this effort? Do you intend on submitting a second
iteration of your patch?

Thanks.

Cheers,

- Ben

Masaki Ota May 17, 2016, 12:08 p.m. UTC | #5

Hi, Ben,

I would like to submit this modification, but it is not completed yet

Attached file is Touchpad device driver code for our I2C HID device.
This device is I2C HID Touchpad + StickPointer.

I made the Touchpad code and it can work on Linux.
But StickPointer cannot work.(Actually one device can work, another device cannot work)

I attached the source code.(Please change .zap -> .zip)
Could you just check this source code?

The point is as below.

alps_raw_event(){
case U1_ABSOLUTE_REPORT_ID:
…
case U1_STICK_REPORT_ID:

U1_ABSOLUTE_REPORT_ID <-This is Touchpad data report.
U1_STICK_REPORT_ID <-This is StickPointer data report.

Touchpad data is absolute data. Stickpointer is relative data.
We can receive the data correctly, but maybe need to send each data as each device.

I think we need to add two device in alps_input_configured().
Do you have any idea?

Best Regards,
================================
Masaki Ota
Alps Electric Co., Ltd.
Engineering Dept.M8 
Tel: [phone]
Fax:[phone]
E-mail  [e-mail]
================================
-----Original Message-----
From: Ben Gamari [mailto:[e-mail]] 
Sent: Tuesday, May 17, 2016 6:34 PM
To: ?? ?? Masaki Ota; Niels de Vos; Masaki Ota
Cc: [e-mail]; [e-mail]; [e-mail]; [e-mail]; [e-mail]
Subject: RE: [PATCH] Alps source code update

Masaki Ota <[e-mail]> writes:

> Hi, Niels,
>
> Thank you for reply.
> I will split this modification and post it again.
>
Masaki,

What is the status of this effort? Do you intend on submitting a second iteration of your patch?

Thanks.

Cheers,

- Ben

Ben Gamari May 17, 2016, 1:58 p.m. UTC | #6

Masaki Ota <[e-mail]> writes:

> Hi, Ben,
>
> I would like to submit this modification, but it is not completed yet
>
Alright.

> Attached file is Touchpad device driver code for our I2C HID device.
> This device is I2C HID Touchpad + StickPointer.
>
Fair enough.

What about the PS/2 driver? The patch which gave rise to this thread was
to drivers/input/mouse/alps.c, which supports devices with PS/2
interfaces. I know for a fact that there are still new devices produced
with this hardware (for instance, the Dell Latitude E7470). Do you
intend on adding further protocol support for these newer PS/2 devices?

> I made the Touchpad code and it can work on Linux.
> But StickPointer cannot work.(Actually one device can work, another device cannot work)
>
> I attached the source code.(Please change .zap -> .zip)
> Could you just check this source code?
>
I'm afraid I can't do a proper review without a proper patch. However,
it sounds like your intuition is correct: the device is exposing two
physical devices, therefore it should be exposed to the kernel as
two input devices.

A maintainer would likely be better equipped to provide guidance here,
but my guess would be you want to simply allocate a second input device,
as is done in the dualpoint codepath in the alps PS/2 driver [1].

Also, note that you will want to clean up the DOS line endings in
hid-alps.c before submitting this for review.

Cheers,

- Ben


[1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/input/mouse/alps.c#n2923

Patch

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index a59a1a6..d4fc568 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -20,6 +20,7 @@ 
 #include <linux/input/mt.h>
 #include <linux/serio.h>
 #include <linux/libps2.h>
+#include <linux/kernel.h>
 
 #include "psmouse.h"
 #include "alps.h"
@@ -32,6 +33,8 @@ 
 #define ALPS_REG_BASE_RUSHMORE	0xc2c0
 #define ALPS_REG_BASE_PINNACLE	0x0000
 
+#define V7_LARGE_MOVEMENT		130
+
 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
 	{ PSMOUSE_CMD_SETPOLL,		0x00 }, /* 0 */
 	{ PSMOUSE_CMD_RESET_DIS,	0x00 }, /* 1 */
@@ -99,8 +102,10 @@  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_IS_RUSHMORE	0x100	/* device is a rushmore */
-#define ALPS_BUTTONPAD		0x200	/* device is a clickpad */
+#define ALPS_BTNLESS			0x100	/* ALPS ClickPad flag */
+
+#define	DOL_IS_APDATA(_BY)			((_BY[0]&0x01) == 0x01)
+#define	DOL_IS_PROFDATA(_BY)		((_BY[0]&0x20) == 0x20)
 
 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 */
@@ -142,6 +147,20 @@  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,
@@ -283,10 +302,11 @@  static void alps_process_packet_v1_v2(struct psmouse *psmouse)
  *
  * The bitmaps don't have enough data to track fingers, so this function
  * only generates points representing a bounding box of at most two contacts.
- * These two points are returned in fields->mt.
+ * These two points are returned in x1, y1, x2, and y2.
  */
 static void alps_process_bitmap_dolphin(struct alps_data *priv,
-					struct alps_fields *fields)
+					struct alps_fields *fields,
+					int *x1, int *y1, int *x2, int *y2)
 {
 	int box_middle_x, box_middle_y;
 	unsigned int x_map, y_map;
@@ -309,6 +329,8 @@  static void alps_process_bitmap_dolphin(struct alps_data *priv,
 	if (x_msb > priv->x_bits || y_msb > priv->y_bits)
 		return;
 
+	*x1 = *y1 = *x2 = *y2 = 0;
+
 	if (fields->fingers > 1) {
 		start_bit = priv->x_bits - x_msb;
 		end_bit = priv->x_bits - x_lsb;
@@ -319,35 +341,10 @@  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));
-		fields->mt[0] = fields->st;
-		fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
-		fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
-	}
-}
-
-static void alps_get_bitmap_points(unsigned int map,
-				   struct alps_bitmap_point *low,
-				   struct alps_bitmap_point *high,
-				   int *fingers)
-{
-	struct alps_bitmap_point *point;
-	int i, bit, prev_bit = 0;
-
-	point = low;
-	for (i = 0; map != 0; i++, map >>= 1) {
-		bit = map & 1;
-		if (bit) {
-			if (!prev_bit) {
-				point->start_bit = i;
-				point->num_bits = 0;
-				(*fingers)++;
-			}
-			point->num_bits++;
-		} else {
-			if (prev_bit)
-				point = high;
-		}
-		prev_bit = bit;
+		*x1 = fields->pt.x;
+		*y1 = fields->pt.y;
+		*x2 = 2 * box_middle_x - *x1;
+		*y2 = 2 * box_middle_y - *y1;
 	}
 }
 
@@ -358,21 +355,71 @@  static void alps_get_bitmap_points(unsigned int map,
  *
  * The bitmaps don't have enough data to track fingers, so this function
  * only generates points representing a bounding box of all contacts.
- * These points are returned in fields->mt when the return value
+ * These points are returned in x1, y1, x2, and y2 when the return value
  * is greater than 0.
  */
 static int alps_process_bitmap(struct alps_data *priv,
-			       struct alps_fields *fields)
+			       unsigned int x_map, unsigned int y_map,
+			       int *x1, int *y1, int *x2, int *y2)
 {
-	int i, fingers_x = 0, fingers_y = 0, fingers;
+	struct alps_bitmap_point {
+		int start_bit;
+		int num_bits;
+	};
+
+	int fingers_x = 0, fingers_y = 0, fingers;
+	int i, bit, prev_bit;
 	struct alps_bitmap_point x_low = {0,}, x_high = {0,};
 	struct alps_bitmap_point y_low = {0,}, y_high = {0,};
+	struct alps_bitmap_point *point;
 
-	if (!fields->x_map || !fields->y_map)
+	if (!x_map || !y_map)
 		return 0;
 
-	alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
-	alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
+	*x1 = *y1 = *x2 = *y2 = 0;
+
+	prev_bit = 0;
+	point = &x_low;
+	for (i = 0; x_map != 0; i++, x_map >>= 1) {
+		bit = x_map & 1;
+		if (bit) {
+			if (!prev_bit) {
+				point->start_bit = i;
+				fingers_x++;
+			}
+			point->num_bits++;
+		} else {
+			if (prev_bit)
+				point = &x_high;
+			else
+				point->num_bits = 0;
+		}
+		prev_bit = bit;
+	}
+
+	/*
+	 * y bitmap is reversed for what we need (lower positions are in
+	 * higher bits), so we process from the top end.
+	 */
+	y_map = y_map << (sizeof(y_map) * BITS_PER_BYTE - priv->y_bits);
+	prev_bit = 0;
+	point = &y_low;
+	for (i = 0; y_map != 0; i++, y_map <<= 1) {
+		bit = y_map & (1 << (sizeof(y_map) * BITS_PER_BYTE - 1));
+		if (bit) {
+			if (!prev_bit) {
+				point->start_bit = i;
+				fingers_y++;
+			}
+			point->num_bits++;
+		} else {
+			if (prev_bit)
+				point = &y_high;
+			else
+				point->num_bits = 0;
+		}
+		prev_bit = bit;
+	}
 
 	/*
 	 * Fingers can overlap, so we use the maximum count of fingers
@@ -381,89 +428,103 @@  static int alps_process_bitmap(struct alps_data *priv,
 	fingers = max(fingers_x, fingers_y);
 
 	/*
-	 * If an axis reports only a single contact, we have overlapping or
-	 * adjacent fingers. Divide the single contact between the two points.
+	 * If total fingers is > 1 but either axis reports only a single
+	 * contact, we have overlapping or adjacent fingers. For the
+	 * purposes of creating a bounding box, divide the single contact
+	 * (roughly) equally between the two points.
 	 */
-	if (fingers_x == 1) {
-		i = (x_low.num_bits - 1) / 2;
-		x_low.num_bits = x_low.num_bits - i;
-		x_high.start_bit = x_low.start_bit + i;
-		x_high.num_bits = max(i, 1);
-	}
-	if (fingers_y == 1) {
-		i = (y_low.num_bits - 1) / 2;
-		y_low.num_bits = y_low.num_bits - i;
-		y_high.start_bit = y_low.start_bit + i;
-		y_high.num_bits = max(i, 1);
-	}
-
-	fields->mt[0].x =
-		(priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
-		(2 * (priv->x_bits - 1));
-	fields->mt[0].y =
-		(priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
-		(2 * (priv->y_bits - 1));
-
-	fields->mt[1].x =
-		(priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
-		(2 * (priv->x_bits - 1));
-	fields->mt[1].y =
-		(priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
-		(2 * (priv->y_bits - 1));
-
-	/* y-bitmap order is reversed, except on rushmore */
-	if (!(priv->flags & ALPS_IS_RUSHMORE)) {
-		fields->mt[0].y = priv->y_max - fields->mt[0].y;
-		fields->mt[1].y = priv->y_max - fields->mt[1].y;
+	if (fingers > 1) {
+		if (fingers_x == 1) {
+			i = x_low.num_bits / 2;
+			x_low.num_bits = x_low.num_bits - i;
+			x_high.start_bit = x_low.start_bit + i;
+			x_high.num_bits = max(i, 1);
+		} else if (fingers_y == 1) {
+			i = y_low.num_bits / 2;
+			y_low.num_bits = y_low.num_bits - i;
+			y_high.start_bit = y_low.start_bit + i;
+			y_high.num_bits = max(i, 1);
+		}
+	}
+
+	*x1 = (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
+	      (2 * (priv->x_bits - 1));
+	*y1 = (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
+	      (2 * (priv->y_bits - 1));
+
+	if (fingers > 1) {
+		*x2 = (priv->x_max *
+		       (2 * x_high.start_bit + x_high.num_bits - 1)) /
+		      (2 * (priv->x_bits - 1));
+		*y2 = (priv->y_max *
+		       (2 * y_high.start_bit + y_high.num_bits - 1)) /
+		      (2 * (priv->y_bits - 1));
 	}
 
 	return fingers;
 }
 
-static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
+static void alps_set_slot(struct input_dev *dev, int slot, bool active,
+			  int x, int y)
 {
 	input_mt_slot(dev, slot);
-	input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
-	input_report_abs(dev, ABS_MT_POSITION_X, x);
-	input_report_abs(dev, ABS_MT_POSITION_Y, y);
+	input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
+	if (active) {
+		input_report_abs(dev, ABS_MT_POSITION_X, x);
+		input_report_abs(dev, ABS_MT_POSITION_Y, y);
+	}
 }
 
-static void alps_report_mt_data(struct psmouse *psmouse, int n)
+static void alps_report_semi_mt_data(struct input_dev *dev, int num_fingers,
+				     int x1, int y1, int x2, int y2)
 {
-	struct alps_data *priv = psmouse->private;
-	struct input_dev *dev = psmouse->dev;
-	struct alps_fields *f = &priv->f;
-	int i, slot[MAX_TOUCHES];
+	alps_set_slot(dev, 0, num_fingers != 0, x1, y1);
+	alps_set_slot(dev, 1, num_fingers == 2, x2, y2);
+}
 
-	input_mt_assign_slots(dev, slot, f->mt, n);
-	for (i = 0; i < n; i++)
-		alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
+static void alps_report_semi_mt_data_ex(struct input_dev *dev, int num_fingers,
+				     struct alps_abs_data coord[])
+{
+	unsigned char i;
 
-	input_mt_sync_frame(dev);
+	for (i = 0; i < num_fingers; i++) {
+		if (!coord[i].x || !coord[i].y || !coord[i].z)
+			alps_set_slot(dev, i, 0, coord[i].x, coord[i].y);
+		else
+			alps_set_slot(dev, i, 1, coord[i].x, coord[i].y);
+	}
 }
 
-static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
+static void alps_report_coord_and_btn(struct psmouse *psmouse,
+				      struct alps_fields *f)
 {
-	struct alps_data *priv = psmouse->private;
-	struct input_dev *dev = psmouse->dev;
-	struct alps_fields *f = &priv->f;
+	struct input_dev *dev;
 
-	/* Use st data when we don't have mt data */
-	if (fingers < 2) {
-		f->mt[0].x = f->st.x;
-		f->mt[0].y = f->st.y;
-		fingers = f->pressure > 0 ? 1 : 0;
-	}
+	if (!psmouse || !f)
+		return;
 
-	alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
+	dev = psmouse->dev;
 
-	input_mt_report_finger_count(dev, fingers);
+	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_key(dev, BTN_LEFT, f->left);
-	input_report_key(dev, BTN_RIGHT, f->right);
-	input_report_key(dev, BTN_MIDDLE, f->middle);
+		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_abs(dev, ABS_PRESSURE, f->pressure);
+	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);
 
 	input_sync(dev);
 }
@@ -530,16 +591,25 @@  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 int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
+/* proto_v9 */
+static void alps_decode_button_ss3(struct alps_fields *f, unsigned char *p,
+				struct alps_data *priv)
+{
+	if (f->dol_packet_type == DOL_GPDATA ||
+		f->dol_packet_type == DOL_APDATA)
+		f->btn.left = !!(p[3]&0x01);
+}
+
+static void alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 				 struct psmouse *psmouse)
 {
 	f->first_mp = !!(p[4] & 0x40);
@@ -553,17 +623,15 @@  static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
 		   ((p[2] & 0x7f) << 1) |
 		   (p[4] & 0x01);
 
-	f->st.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->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
-	f->pressure = 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);
-
-	return 0;
 }
 
-static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
+static void alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 				 struct psmouse *psmouse)
 {
 	alps_decode_pinnacle(f, p, psmouse);
@@ -573,25 +641,20 @@  static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
 	f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
 	f->x_map |= (p[5] & 0x10) << 11;
 	f->y_map |= (p[5] & 0x20) << 6;
-
-	return 0;
 }
 
-static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
+static void alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 				struct psmouse *psmouse)
 {
 	u64 palm_data = 0;
 	struct alps_data *priv = psmouse->private;
 
-	f->first_mp = !!(p[0] & 0x02);
-	f->is_mp = !!(p[0] & 0x20);
+	f->is_mp = 0;
+	f->first_mp = 0;
 
-	if (!f->is_mp) {
-		f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
-		f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
-		f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
-		alps_decode_buttons_v3(f, p);
-	} else {
+	if (DOL_IS_PROFDATA(p)) {
+		f->is_mp = 1;
+		f->dol_packet_type = DOL_PROFDATA;
 		f->fingers = ((p[0] & 0x6) >> 1 |
 		     (p[0] & 0x10) >> 2);
 
@@ -609,22 +672,415 @@  static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
 		/* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
 		f->x_map = (palm_data >> priv->y_bits) &
 			   (BIT(priv->x_bits) - 1);
+	} else {
+		if (DOL_IS_APDATA(p)) {
+			f->dol_packet_type = DOL_APDATA;
+			f->fingers = 2;
+			f->pt_img[0].x = p[1]<<3;
+			f->pt_img[0].y = p[2]<<2;
+			f->pt_img[0].z = 64;
+			f->pt_img[1].x = p[4]<<3;
+			f->pt_img[1].y = p[5]<<2;
+			f->pt_img[1].z = 64;
+		} else {/* is gp data */
+			f->dol_packet_type = DOL_GPDATA;
+			f->first_mp = !!(p[0]&0x02);
+			f->pt.x = f->pt_img[0].x =
+				((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
+			f->pt.y = f->pt_img[0].y =
+				((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
+			f->pt.z = f->pt_img[0].z =
+				min(((p[0] & 0x04) ? 0 : p[5] & 0x7f) * 2, 127);
+
+			/*
+				Button number will be included in
+				the PROFILE data for a 3-f packet.
+				So do not change .fingers because
+				it will be updated in Profile data packet.
+			*/
+			if (!f->first_mp)
+				f->fingers = (f->pt_img[0].x &&
+					f->pt_img[0].y && f->pt_img[0].z)?1:0;
+		}
+
+		if (priv->proto_version == ALPS_PROTO_V9)
+			alps_decode_button_ss3(f, p, priv);
+		else
+			alps_decode_buttons_v3(f, p);
 	}
+}
 
-	return 0;
+unsigned char alps_get_pkt_id_ss4_v1(char *byte)
+{
+	unsigned char pkt_id = SS4_PACKET_ID_IDLE;
+
+	if (((byte[0] & 0xFF) == 0x08) && ((byte[1] & 0xFF) == 0x10) &&
+	     ((byte[2] & 0xFF) == 0x00) && ((byte[3] & 0x8F) == 0x08) &&
+	     ((byte[4] & 0xFF) == 0x01) && ((byte[5] & 0xFF) == 0x00)) {
+		pkt_id = SS4_PACKET_ID_IDLE;
+	} else if (((byte[0] & 0x08) == 0x08) && ((byte[1] & 0x10) == 0x10) &&
+		((byte[3] & 0x8E) == 0x08) && ((byte[4] & 0x81) == 0x01)) {
+		pkt_id = SS4_PACKET_ID_ONE;
+	} else if (((byte[0] & 0x08) == 0x08) && ((byte[3] & 0x08) == 0x08) &&
+		  ((byte[4] & 0x01) == 0x01)) {
+		if (((byte[5] & 0x01) == 0x01))
+			pkt_id = SS4_PACKET_ID_TWO;
+		else
+			pkt_id = SS4_PACKET_ID_MULTI;
+	}
+
+	return pkt_id;
+}
+
+unsigned char alps_get_pkt_id_ss4_v2(char *byte)
+{
+	unsigned char pkt_id = SS4_PACKET_ID_IDLE;
+
+	if (((byte[0] & 0xFF) == 0x18) && ((byte[1] & 0xFF) == 0x10) &&
+	     ((byte[2] & 0xFF) == 0x00) && ((byte[3] & 0x88) == 0x08) &&
+	     ((byte[4] & 0xFF) == 0x10) && ((byte[5] & 0xFF) == 0x00)) {
+		pkt_id = SS4_PACKET_ID_IDLE;
+	} else if (!(byte[3] & 0x10)) {
+		pkt_id = SS4_PACKET_ID_ONE;
+	} else {
+		if (!(byte[3] & 0x20))
+			pkt_id = SS4_PACKET_ID_TWO;
+		else
+			pkt_id = SS4_PACKET_ID_MULTI;
+	}
+
+	return pkt_id;
+}
+
+static void alps_process_btnless_click(struct psmouse *psmouse,
+				struct alps_fields *f)
+{
+	struct alps_data *priv = psmouse->private;
+
+	if (!f->btn.left)
+		return;
+
+	/* Clear button flag */
+	f->btn.left = 0;
+
+	switch (f->fingers) {
+	case 1:
+		/* In Left Resting Area */
+		if (PT_IN_LEFT_BTN_AREA(f->pt_img[0].x,
+				f->pt_img[0].y, priv->x_max, priv->y_max)) {
+			f->btn.left = 1;
+		} else if (PT_IN_RIGHT_BTN_AREA(f->pt_img[0].x,
+				f->pt_img[0].y, priv->x_max, priv->y_max)) {
+			/* In Right Resting Area */
+			f->btn.right = 1;
+		} else {
+			/* In Normal area */
+			f->btn.left = 1;
+		}
+		break;
+
+	case 2:
+		/* Both two fingers are in Normal area */
+		if (!PT_IN_BTN_AREA(f->pt_img[0].x,
+				f->pt_img[0].y, priv->x_max, priv->y_max) &&
+				!PT_IN_BTN_AREA(f->pt_img[1].x,
+				f->pt_img[1].y, priv->x_max, priv->y_max)) {
+			f->btn.right = 1;
+		} else if (PT_IN_RIGHT_BTN_AREA(f->pt_img[0].x,
+				f->pt_img[0].y, priv->x_max, priv->y_max) ||
+				PT_IN_RIGHT_BTN_AREA(f->pt_img[1].x,
+				f->pt_img[1].y, priv->x_max, priv->y_max)) {
+			/* Either one finger is in Right Area */
+			f->btn.right = 1;
+		} else {
+			f->btn.left = 1;
+		}
+		break;
+
+	case 3:
+		f->btn.middle = 1;
+		break;
+
+	case 0:
+	default:
+		break;
+	}
+}
+
+static void alps_process_resting_finger(struct psmouse *psmouse,
+	struct alps_fields *f, struct alps_abs_data *output,
+	unsigned char *p_fn)
+{
+	struct alps_data *priv = psmouse->private;
+	static struct alps_abs_data prev_pt[10];
+	static struct alps_abs_data init_pt[10];
+	static unsigned char is_moved[10];
+	static unsigned char prev_fn;
+	static unsigned char prev_coord_is_output[10];
+	unsigned char cur_coord_is_output[10];
+	unsigned char in_resting_area[10];
+	unsigned char i, index;
+	unsigned char output_fn = 0;
+
+	memset(in_resting_area, 0, sizeof(in_resting_area));
+	memset(cur_coord_is_output, 0, sizeof(cur_coord_is_output));
+
+	/* Clear "is_moved" flag when finger number changed */
+	if (f->fingers != prev_fn) {
+		memset(is_moved, 0, sizeof(is_moved));
+		memcpy(init_pt, f->pt_img, sizeof(f->pt_img));
+	}
+
+	/* Calculate output finger */
+	for (i = 0, index = 0; i < f->fingers; i++) {
+		if (is_moved[i] == 0 &&
+			(abs(f->pt_img[i].x - init_pt[i].x)
+				> RESTING_FN_LARGE_MOVEMENT)) {
+			is_moved[i] = 1;
+		}
+
+		/* Check if in resting area */
+		if (PT_IN_BTN_AREA(f->pt_img[i].x,
+				f->pt_img[i].y, priv->x_max, priv->y_max))
+			in_resting_area[i] = 1;
+
+		if (!in_resting_area[i] ||
+			(in_resting_area[i] && is_moved[i])) {
+			memcpy(&output[index++], &f->pt_img[i],
+				sizeof(struct alps_abs_data));
+			cur_coord_is_output[i] = 1;
+			output_fn++;
+		}
+	}
+
+	/* A normal finger becomes a resting finger */
+	for (i = 0; i < f->fingers; i++) {
+		if (prev_coord_is_output[i] &&
+			!cur_coord_is_output[i] && f->pt_img[i].z) {
+			output_fn = 0;
+			memset(output, 0,
+				sizeof(struct alps_abs_data)*f->fingers);
+		}
+	}
+
+	memcpy(prev_pt, f->pt_img, sizeof(f->pt_img));
+	memcpy(prev_coord_is_output, cur_coord_is_output,
+		sizeof(cur_coord_is_output));
+	prev_fn = f->fingers;
+	*p_fn = output_fn;
+}
+
+static void alps_decode_ss4_v1(struct alps_fields *f,
+			unsigned char *p, struct psmouse *psmouse)
+{
+	struct alps_data *priv = psmouse->private;
+	unsigned char pkt_id;
+	unsigned int no_data_x, no_data_y;
+
+	if (!psmouse || !f || !p)
+		return;
+
+	pkt_id = alps_get_pkt_id_ss4_v1(p);
+
+	/* Current packet is 1Finger coordinate packet */
+	switch (pkt_id) {
+	case SS4_PACKET_ID_ONE:
+		f->pt_img[0].x = SS4_1F_X_V1(p);
+		f->pt_img[0].y = SS4_1F_Y_V1(p);
+		/* Keep Z-value in 0-127 */
+		f->pt_img[0].z = min(((SS4_1F_Z_V1(p)) * 2), 127);
+		f->large_fn |= SS4_1F_LFB(p) ? 0x01 : 0x00;
+		f->fingers = 1;
+		f->first_mp = 0;
+		f->is_mp = 0;
+		break;
+
+	case SS4_PACKET_ID_TWO:
+		if (priv->flags & ALPS_BTNLESS) {
+			f->pt_img[0].x = SS4_BTL_MF_X_V1(p, 0);
+			f->pt_img[0].y = SS4_BTL_MF_Y_V1(p, 0);
+			f->pt_img[1].x = SS4_BTL_MF_X_V1(p, 1);
+			f->pt_img[1].y = SS4_BTL_MF_Y_V1(p, 1);
+		} else {
+			f->pt_img[0].x = SS4_STD_MF_X_V1(p, 0);
+			f->pt_img[0].y = SS4_STD_MF_Y_V1(p, 0);
+			f->pt_img[1].x = SS4_STD_MF_X_V1(p, 1);
+			f->pt_img[1].y = SS4_STD_MF_Y_V1(p, 1);
+		}
+		f->pt_img[0].z = SS4_MF_Z_V1(p, 0) ? 0x30 : 0;
+		f->pt_img[1].z = SS4_MF_Z_V1(p, 1) ? 0x30 : 0;
+
+		if (SS4_IS_MF_CONTINUE_V1(p)) {
+			f->first_mp = 1;
+		} else {
+			f->fingers = 2;
+			f->first_mp = 0;
+		}
+		f->is_mp = 0;
+
+		break;
+
+	case SS4_PACKET_ID_MULTI:
+		if (priv->flags & ALPS_BTNLESS) {
+			f->pt_img[2].x = SS4_BTL_MF_X_V1(p, 0);
+			f->pt_img[2].y = SS4_BTL_MF_Y_V1(p, 0);
+			f->pt_img[3].x = SS4_BTL_MF_X_V1(p, 1);
+			f->pt_img[3].y = SS4_BTL_MF_Y_V1(p, 1);
+			no_data_x = SS4_MFPACKET_NO_AX_BL;
+			no_data_y = SS4_MFPACKET_NO_AY_BL;
+		} else {
+			f->pt_img[2].x = SS4_STD_MF_X_V1(p, 0);
+			f->pt_img[2].y = SS4_STD_MF_Y_V1(p, 0);
+			f->pt_img[3].x = SS4_STD_MF_X_V1(p, 1);
+			f->pt_img[3].y = SS4_STD_MF_Y_V1(p, 1);
+			no_data_x = SS4_MFPACKET_NO_AX;
+			no_data_y = SS4_MFPACKET_NO_AY;
+		}
+		f->pt_img[2].z = SS4_MF_Z_V1(p, 0) ? 0x30 : 0;
+		f->pt_img[3].z = SS4_MF_Z_V1(p, 1) ? 0x30 : 0;
+
+		f->first_mp = 0;
+		f->is_mp = 1;
+
+		if (SS4_IS_5F_DETECTED_V1(p)) {
+			f->fingers = 5;
+		} else if (f->pt_img[3].x == no_data_x &&
+			     f->pt_img[3].y == no_data_y) {
+			f->fingers = 3;
+			f->pt_img[3].x = 0;
+			f->pt_img[3].y = 0;
+			f->pt_img[3].z = 0;
+		} else {
+			f->fingers = 4;
+		}
+		break;
+
+	case SS4_PACKET_ID_IDLE:
+	default:
+		memset(f, 0, sizeof(struct alps_fields));
+		break;
+	}
+
+	f->btn.left = !!(SS4_BTN_V1(p) & 0x01);
+	if (!(priv->flags & ALPS_BTNLESS)) {
+		f->btn.right = !!(SS4_BTN_V1(p) & 0x02);
+		f->btn.middle = !!(SS4_BTN_V1(p) & 0x04);
+	}
+}
+
+static void alps_decode_ss4_v2(struct alps_fields *f,
+			unsigned char *p, struct psmouse *psmouse)
+{
+	struct alps_data *priv = psmouse->private;
+	unsigned char pkt_id;
+	unsigned int no_data_x, no_data_y;
+
+	if (!psmouse || !f || !p)
+		return;
+
+	pkt_id = alps_get_pkt_id_ss4_v2(p);
+
+	/* Current packet is 1Finger coordinate packet */
+	switch (pkt_id) {
+	case SS4_PACKET_ID_ONE:
+		f->pt_img[0].x = SS4_1F_X_V2(p);
+		f->pt_img[0].y = SS4_1F_Y_V2(p);
+		/* Keep Z-value in 0-127 */
+		f->pt_img[0].z = min(((SS4_1F_Z_V2(p)) * 2), 127);
+		f->large_fn |= SS4_1F_LFB_V2(p) ? 0x01 : 0x00;
+		f->fingers = 1;
+		f->first_mp = 0;
+		f->is_mp = 0;
+		break;
+
+	case SS4_PACKET_ID_TWO:
+		if (priv->flags & ALPS_BTNLESS) {
+			f->pt_img[0].x = SS4_BTL_MF_X_V2(p, 0);
+			f->pt_img[0].y = SS4_BTL_MF_Y_V2(p, 0);
+			f->pt_img[1].x = SS4_BTL_MF_X_V2(p, 1);
+			f->pt_img[1].y = SS4_BTL_MF_Y_V2(p, 1);
+		} else {
+			f->pt_img[0].x = SS4_STD_MF_X_V2(p, 0);
+			f->pt_img[0].y = SS4_STD_MF_Y_V2(p, 0);
+			f->pt_img[1].x = SS4_STD_MF_X_V2(p, 1);
+			f->pt_img[1].y = SS4_STD_MF_Y_V2(p, 1);
+		}
+		f->pt_img[0].z = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
+		f->pt_img[1].z = SS4_MF_Z_V2(p, 1) ? 0x30 : 0;
+
+		f->large_fn |= SS4_MF_LF_V2(p, 0) ? 0x01 : 0;
+		f->large_fn |= SS4_MF_LF_V2(p, 1) ? 0x02 : 0;
+
+		if (SS4_IS_MF_CONTINUE_V2(p)) {
+			f->first_mp = 1;
+		} else {
+			f->fingers = 2;
+			f->first_mp = 0;
+		}
+		f->is_mp = 0;
+		break;
+
+	case SS4_PACKET_ID_MULTI:
+		if (priv->flags & ALPS_BTNLESS) {
+			f->pt_img[2].x = SS4_BTL_MF_X_V2(p, 0);
+			f->pt_img[2].y = SS4_BTL_MF_Y_V2(p, 0);
+			f->pt_img[3].x = SS4_BTL_MF_X_V2(p, 1);
+			f->pt_img[3].y = SS4_BTL_MF_Y_V2(p, 1);
+			no_data_x = SS4_MFPACKET_NO_AX_BL;
+			no_data_y = SS4_MFPACKET_NO_AY_BL;
+		} else {
+			f->pt_img[2].x = SS4_STD_MF_X_V2(p, 0);
+			f->pt_img[2].y = SS4_STD_MF_Y_V2(p, 0);
+			f->pt_img[3].x = SS4_STD_MF_X_V2(p, 1);
+			f->pt_img[3].y = SS4_STD_MF_Y_V2(p, 1);
+			no_data_x = SS4_MFPACKET_NO_AX;
+			no_data_y = SS4_MFPACKET_NO_AY;
+		}
+		f->pt_img[2].z = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
+		f->pt_img[3].z = SS4_MF_Z_V2(p, 1) ? 0x30 : 0;
+
+		f->large_fn |= SS4_MF_LF_V2(p, 0) ? 0x04 : 0;
+		f->large_fn |= SS4_MF_LF_V2(p, 1) ? 0x08 : 0;
+		f->first_mp = 0;
+		f->is_mp = 1;
+
+		if (SS4_IS_5F_DETECTED_V2(p)) {
+			f->fingers = 5;
+		} else if (f->pt_img[3].x == no_data_x &&
+			     f->pt_img[3].y == no_data_y) {
+			f->fingers = 3;
+			f->pt_img[3].x = 0;
+			f->pt_img[3].y = 0;
+			f->pt_img[3].z = 0;
+		} else {
+			f->fingers = 4;
+		}
+		break;
+
+	case SS4_PACKET_ID_IDLE:
+	default:
+		memset(f, 0, sizeof(struct alps_fields));
+		break;
+	}
+
+	f->btn.left = !!(SS4_BTN_V2(p) & 0x01);
+	if (!(priv->flags & ALPS_BTNLESS)) {
+		f->btn.right = !!(SS4_BTN_V2(p) & 0x02);
+		f->btn.middle = !!(SS4_BTN_V2(p) & 0x04);
+	}
 }
 
 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
 	unsigned char *packet = psmouse->packet;
+	struct input_dev *dev = psmouse->dev;
 	struct input_dev *dev2 = priv->dev2;
-	struct alps_fields *f = &priv->f;
-	int fingers = 0;
+	int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
+	int fingers = 0, bmap_fn;
+	struct alps_fields f = {0};
 
-	memset(f, 0, sizeof(*f));
-
-	priv->decode_fields(f, packet, psmouse);
+	priv->decode_fields(&f, packet, psmouse);
 
 	/*
 	 * There's no single feature of touchpad position and bitmap packets
@@ -639,14 +1095,22 @@  static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 		 * packet. Check for this, and when it happens process the
 		 * position packet as usual.
 		 */
-		if (f->is_mp) {
-			fingers = f->fingers;
+		if (f.is_mp) {
+			fingers = f.fingers;
 			if (priv->proto_version == ALPS_PROTO_V3) {
-				if (alps_process_bitmap(priv, f) == 0)
-					fingers = 0; /* Use st data */
+				bmap_fn = alps_process_bitmap(priv, f.x_map,
+							      f.y_map, &x1, &y1,
+							      &x2, &y2);
+
+				/*
+				 * We shouldn't report more than one finger if
+				 * we don't have two coordinates.
+				 */
+				if (fingers > 1 && bmap_fn < 2)
+					fingers = bmap_fn;
 
 				/* Now process position packet */
-				priv->decode_fields(f, priv->multi_data,
+				priv->decode_fields(&f, priv->multi_data,
 						    psmouse);
 			} else {
 				/*
@@ -655,14 +1119,15 @@  static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 				 * calculate Pt2, so we need to do position
 				 * packet decode first.
 				 */
-				priv->decode_fields(f, priv->multi_data,
+				priv->decode_fields(&f, priv->multi_data,
 						    psmouse);
 
 				/*
 				 * Since Dolphin's finger number is reliable,
 				 * there is no need to compare with bmap_fn.
 				 */
-				alps_process_bitmap_dolphin(priv, f);
+				alps_process_bitmap_dolphin(priv, &f, &x1, &y1,
+					&x2, &y2);
 			}
 		} else {
 			priv->multi_packet = 0;
@@ -677,10 +1142,10 @@  static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
 	 * out misidentified bitmap packets, we reject anything with this
 	 * bit set.
 	 */
-	if (f->is_mp)
+	if (f.is_mp)
 		return;
 
-	if (!priv->multi_packet && f->first_mp) {
+	if (!priv->multi_packet && f.first_mp) {
 		priv->multi_packet = 1;
 		memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
 		return;
@@ -694,15 +1159,44 @@  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->st.x && f->st.y && !f->pressure)
+	if (f.pt.x && f.pt.y && !f.pt.z)
 		return;
 
-	alps_report_semi_mt_data(psmouse, fingers);
+	/*
+	 * If we don't have MT data or the bitmaps were empty, we have
+	 * to rely on ST data.
+	 */
+	if (!fingers) {
+		x1 = f.pt.x;
+		y1 = f.pt.y;
+		fingers = f.pt.z > 0 ? 1 : 0;
+	}
+
+	if (f.pt.z > 0)
+		input_report_key(dev, BTN_TOUCH, 1);
+	else
+		input_report_key(dev, BTN_TOUCH, 0);
+
+	alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
+
+	input_mt_report_finger_count(dev, fingers);
+
+	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.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.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);
 	}
 }
@@ -727,6 +1221,64 @@  static void alps_process_packet_v3(struct psmouse *psmouse)
 	alps_process_touchpad_packet_v3_v5(psmouse);
 }
 
+/* proto_v9 */
+static void alps_process_touchpad_packet_ss3(struct psmouse *psmouse)
+{
+	struct alps_data *priv = psmouse->private;
+	unsigned char *packet = psmouse->packet;
+	struct input_dev *dev = psmouse->dev;
+	int fingers = 0;
+	struct alps_fields f = {0};
+	struct alps_abs_data	pt_output[2] = { {0, 0, 0}, {0, 0, 0} };
+	unsigned char output_fn_num = 0;
+
+	priv->decode_fields(&f, packet, psmouse);
+
+	if ((!!priv->multi_packet) != (!!f.is_mp)) {
+		priv->multi_packet = 0;
+		return;
+	}
+
+	/* When f.first_mp is 1, next packet should be a
+	 *	bitmap packet(when there is no error).
+	 */
+	priv->multi_packet = f.first_mp;
+
+	/* Don't process any 3-f data */
+	if (f.first_mp || f.is_mp)
+		return;
+
+	/*
+	 * If we don't have MT data or the bitmaps were empty, we have
+	 * to rely on ST data.
+	 */
+	fingers = f.fingers;
+
+	alps_process_resting_finger(psmouse, &f, pt_output, &output_fn_num);
+	alps_process_btnless_click(psmouse, &f);
+
+	if (pt_output[0].z || pt_output[1].z)
+		input_report_key(dev, BTN_TOUCH, 1);
+	else
+		input_report_key(dev, BTN_TOUCH, 0);
+
+	alps_report_semi_mt_data_ex(dev, 2, pt_output);
+
+	input_mt_report_finger_count(dev, output_fn_num);
+
+	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 (pt_output[0].z > 0) {
+		input_report_abs(dev, ABS_X, pt_output[0].x);
+		input_report_abs(dev, ABS_Y, pt_output[0].y);
+	}
+	input_report_abs(dev, ABS_PRESSURE, pt_output[0].z ? 30 : 0);
+
+	input_sync(dev);
+}
+
 static void alps_process_packet_v6(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
@@ -801,8 +1353,13 @@  static void alps_process_packet_v4(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
 	unsigned char *packet = psmouse->packet;
-	struct alps_fields *f = &priv->f;
+	struct input_dev *dev = psmouse->dev;
 	int offset;
+	int x, y, z;
+	int left, right;
+	int x1, y1, x2, y2;
+	int fingers = 0;
+	unsigned int x_bitmap, y_bitmap;
 
 	/*
 	 * v4 has a 6-byte encoding for bitmap data, but this data is
@@ -824,41 +1381,96 @@  static void alps_process_packet_v4(struct psmouse *psmouse)
 	if (++priv->multi_packet > 2) {
 		priv->multi_packet = 0;
 
-		f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
+		x_bitmap = ((priv->multi_data[2] & 0x1f) << 10) |
 			   ((priv->multi_data[3] & 0x60) << 3) |
 			   ((priv->multi_data[0] & 0x3f) << 2) |
 			   ((priv->multi_data[1] & 0x60) >> 5);
-		f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
+		y_bitmap = ((priv->multi_data[5] & 0x01) << 10) |
 			   ((priv->multi_data[3] & 0x1f) << 5) |
 			    (priv->multi_data[1] & 0x1f);
 
-		f->fingers = alps_process_bitmap(priv, f);
+		fingers = alps_process_bitmap(priv, x_bitmap, y_bitmap,
+					      &x1, &y1, &x2, &y2);
+
+		/* Store MT data.*/
+		priv->fingers = fingers;
+		priv->x1 = x1;
+		priv->x2 = x2;
+		priv->y1 = y1;
+		priv->y2 = y2;
 	}
 
-	f->left = packet[4] & 0x01;
-	f->right = packet[4] & 0x02;
+	left = packet[4] & 0x01;
+	right = packet[4] & 0x02;
+
+	x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
+	    ((packet[0] & 0x30) >> 4);
+	y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
+	z = packet[5] & 0x7f;
+
+	/*
+	 * If there were no contacts in the bitmap, use ST
+	 * points in MT reports.
+	 * If there were two contacts or more, report MT data.
+	 */
+	if (priv->fingers < 2) {
+		x1 = x;
+		y1 = y;
+		fingers = z > 0 ? 1 : 0;
+	} else {
+		fingers = priv->fingers;
+		x1 = priv->x1;
+		x2 = priv->x2;
+		y1 = priv->y1;
+		y2 = priv->y2;
+	}
+
+	if (z >= 64)
+		input_report_key(dev, BTN_TOUCH, 1);
+	else
+		input_report_key(dev, BTN_TOUCH, 0);
+
+	alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
+
+	input_mt_report_finger_count(dev, fingers);
+
+	input_report_key(dev, BTN_LEFT, left);
+	input_report_key(dev, BTN_RIGHT, right);
 
-	f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
-		  ((packet[0] & 0x30) >> 4);
-	f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
-	f->pressure = packet[5] & 0x7f;
+	if (z > 0) {
+		input_report_abs(dev, ABS_X, x);
+		input_report_abs(dev, ABS_Y, y);
+	}
+	input_report_abs(dev, ABS_PRESSURE, z);
 
-	alps_report_semi_mt_data(psmouse, f->fingers);
+	input_sync(dev);
 }
 
 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
 {
-	switch (psmouse->pktcnt) {
-	case 3:
-		return (psmouse->packet[2] & 0x40) == 0x40;
-	case 4:
-		return (psmouse->packet[3] & 0x48) == 0x48;
-	case 6:
-		return (psmouse->packet[5] & 0x40) == 0x00;
-	}
+	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;
@@ -874,85 +1486,251 @@  static unsigned char alps_get_packet_id_v7(char *byte)
 	else
 		packet_id = V7_PACKET_ID_UNKNOWN;
 
-	return packet_id;
+	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;
+
+	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;
+	memset(&f->btn, 0, sizeof(struct alps_btn));
+
+	if (priv->r.v7.pkt_id == V7_PACKET_ID_TWO ||
+	    priv->r.v7.pkt_id == V7_PACKET_ID_MULTI) {
+
+		if (priv->flags & ALPS_BTNLESS) {
+			priv->r.v7.rest_left = (p[0] & 0x10) >> 4;
+			priv->r.v7.rest_right = (p[0] & 0x20) >> 5;
+			f->btn.middle = (p[0] & 0x80) >> 7;
+		} else {
+			f->btn.left = (p[0] & 0x80) >> 7;
+			f->btn.right = (p[0] & 0x20) >> 5;
+			f->btn.middle = (p[0] & 0x10) >> 4;
+		}
+	}
+
+	if (priv->r.v7.pkt_id == V7_PACKET_ID_MULTI)
+		priv->r.v7.additional_fingers = p[5] & 0x03;
 }
 
-static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
-					  unsigned char *pkt,
-					  unsigned char pkt_id)
+static void alps_set_each_pt_attr_v7(struct psmouse *psmouse,
+				     struct alps_abs_data *pt,
+				     struct alps_bl_pt_attr *pt_attr)
 {
-	mt[0].x = ((pkt[2] & 0x80) << 4);
-	mt[0].x |= ((pkt[2] & 0x3F) << 5);
-	mt[0].x |= ((pkt[3] & 0x30) >> 1);
-	mt[0].x |= (pkt[3] & 0x07);
-	mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
+	struct alps_data *priv = psmouse->private;
+	unsigned int dist;
 
-	mt[1].x = ((pkt[3] & 0x80) << 4);
-	mt[1].x |= ((pkt[4] & 0x80) << 3);
-	mt[1].x |= ((pkt[4] & 0x3F) << 4);
-	mt[1].y = ((pkt[5] & 0x80) << 3);
-	mt[1].y |= ((pkt[5] & 0x3F) << 4);
+	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));
+	}
 
-	switch (pkt_id) {
-	case V7_PACKET_ID_TWO:
-		mt[1].x &= ~0x000F;
-		mt[1].y |= 0x000F;
-		break;
+	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;
+			}
+		}
+	}
+}
 
-	case V7_PACKET_ID_MULTI:
-		mt[1].x &= ~0x003F;
-		mt[1].y &= ~0x0020;
-		mt[1].y |= ((pkt[4] & 0x02) << 4);
-		mt[1].y |= 0x001F;
-		break;
+static void alps_set_pt_attr_v7(struct psmouse *psmouse,
+				       struct alps_fields *f)
+{
+	struct alps_data *priv = psmouse->private;
+	int i;
 
-	case V7_PACKET_ID_NEW:
-		mt[1].x &= ~0x003F;
-		mt[1].x |= (pkt[0] & 0x20);
-		mt[1].y |= 0x000F;
+	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]) * V7_IMG_PT_NUM);
 		break;
 	}
-
-	mt[0].y = 0x7FF - mt[0].y;
-	mt[1].y = 0x7FF - mt[1].y;
 }
 
-static int alps_get_mt_count(struct input_mt_pos *mt)
+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;
 
-	for (i = 0; i < MAX_TOUCHES && mt[i].x != 0 && mt[i].y != 0; i++)
-		/* empty */;
+	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;
+	}
 
-	return i;
+	f->fingers = fn;
 }
 
-static int alps_decode_packet_v7(struct alps_fields *f,
-				  unsigned char *p,
-				  struct psmouse *psmouse)
+static void alps_assign_buttons_v7(struct psmouse *psmouse,
+				   struct alps_fields *f)
 {
-	unsigned char pkt_id;
+	struct alps_data *priv = psmouse->private;
 
-	pkt_id = alps_get_packet_id_v7(p);
-	if (pkt_id == V7_PACKET_ID_IDLE)
-		return 0;
-	if (pkt_id == V7_PACKET_ID_UNKNOWN)
-		return -1;
+	/* It's ClickPad */
+	if (priv->flags & ALPS_BTNLESS) {
+		if (!f->btn.middle)
+			goto exit;
+
+		f->btn.middle = 0;
+		if (priv->prev_btn.left || priv->prev_btn.middle ||
+			priv->prev_btn.right) {
+			memcpy(&f->btn, &priv->prev_btn,
+				sizeof(struct alps_btn));
+			goto exit;
+		}
 
-	alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
+		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;
+		} else {
+			f->btn.left = 1;
+		}
 
-	if (pkt_id == V7_PACKET_ID_TWO || pkt_id == V7_PACKET_ID_MULTI) {
-		f->left = (p[0] & 0x80) >> 7;
-		f->right = (p[0] & 0x20) >> 5;
-		f->middle = (p[0] & 0x10) >> 4;
+		goto exit;
 	}
 
-	if (pkt_id == V7_PACKET_ID_TWO)
-		f->fingers = alps_get_mt_count(f->mt);
-	else if (pkt_id == V7_PACKET_ID_MULTI)
-		f->fingers = 3 + (p[5] & 0x03);
+	/* It's Standard, do nothing */
 
-	return 0;
+exit:
+	memcpy(&priv->prev_btn, &f->btn, sizeof(struct alps_btn));
 }
 
 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
@@ -962,21 +1740,9 @@  static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
 	struct input_dev *dev2 = priv->dev2;
 	int x, y, z, left, right, middle;
 
-	/*
-	 *        b7 b6 b5 b4 b3 b2 b1 b0
-	 * Byte0   0  1  0  0  1  0  0  0
-	 * Byte1   1  1  *  *  1  M  R  L
-	 * Byte2  X7  1 X5 X4 X3 X2 X1 X0
-	 * Byte3  Z6  1 Y6 X6  1 Y2 Y1 Y0
-	 * Byte4  Y7  0 Y5 Y4 Y3  1  1  0
-	 * Byte5 T&P  0 Z5 Z4 Z3 Z2 Z1 Z0
-	 * M / R / L: Middle / Right / Left button
-	 */
-
-	x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
-	y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
-	    ((packet[3] & 0x20) << 1);
-	z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
+	x = ((packet[2] & 0xBF)) | ((packet[3] & 0x10) << 2);
+	y = (packet[3] & 0x03) | (packet[4] & 0xB8) | ((packet[3] & 0x20) << 1);
+	z = (packet[5] & 0x3F) | ((packet[3] & 0x80) >> 1);
 
 	left = (packet[1] & 0x01);
 	right = (packet[1] & 0x02) >> 1;
@@ -996,35 +1762,115 @@  static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
-	struct input_dev *dev = psmouse->dev;
-	struct alps_fields *f = &priv->f;
+	struct alps_fields f = {0};
+	unsigned char *packet = psmouse->packet;
 
-	memset(f, 0, sizeof(*f));
+	priv->decode_fields(&f, packet, psmouse);
 
-	if (priv->decode_fields(f, psmouse->packet, psmouse))
+	if (alps_drop_unsupported_packet_v7(psmouse))
 		return;
 
-	alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
+	alps_set_pt_attr_v7(psmouse, &f);
 
-	input_mt_report_finger_count(dev, f->fingers);
+	alps_cal_output_finger_num_v7(psmouse, &f);
 
-	input_report_key(dev, BTN_LEFT, f->left);
-	input_report_key(dev, BTN_RIGHT, f->right);
-	input_report_key(dev, BTN_MIDDLE, f->middle);
+	alps_assign_buttons_v7(psmouse, &f);
 
-	input_sync(dev);
+	alps_report_coord_and_btn(psmouse, &f);
 }
 
 static void alps_process_packet_v7(struct psmouse *psmouse)
 {
 	unsigned char *packet = psmouse->packet;
 
-	if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
+	if ((packet[0] == 0x48) && ((packet[4] & 0x47) == 0x06))
 		alps_process_trackstick_packet_v7(psmouse);
 	else
 		alps_process_touchpad_packet_v7(psmouse);
 }
 
+static void alps_process_packet_ss4(struct psmouse *psmouse)
+{
+	struct alps_data *priv = psmouse->private;
+	unsigned char *packet = psmouse->packet;
+	struct input_dev *dev = psmouse->dev;
+	struct alps_fields f;
+	struct alps_abs_data output_data[5];
+	unsigned char output_fn;
+
+	memset(&f, 0, sizeof(struct alps_fields));
+	priv->decode_fields(&f, packet, psmouse);
+
+	if (priv->multi_packet) {
+		/*
+		 * Sometimes the first packet will indicate a multi-packet
+		 * sequence, but sometimes the next multi-packet would not come.
+		 * Check for this, and when it happens process the
+		 * position packet as usual.
+		 */
+		if (f.is_mp) {
+			/* Now process the 1st packet */
+			priv->decode_fields(&f, priv->multi_data, psmouse);
+		} else {
+			priv->multi_packet = 0;
+		}
+	}
+
+	/*
+	 * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
+	 * When it is set, it means 2nd packet comes without 1st packet come.
+	 */
+	if (f.is_mp)
+		return;
+
+	/* Save the first packet */
+	if (!priv->multi_packet && f.first_mp) {
+		priv->multi_packet = 1;
+		memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
+		return;
+	}
+
+	priv->multi_packet = 0;
+
+	/* Set "output_data" and "output_fn" */
+	memset(&output_data[0], 0, sizeof(output_data));
+	if (priv->flags & ALPS_BTNLESS) {
+		alps_process_resting_finger(psmouse, &f,
+			output_data, &output_fn);
+		alps_process_btnless_click(psmouse, &f);
+	} else {
+		memcpy(&output_data[0], &f.pt_img[0],
+			sizeof(struct alps_abs_data) * f.fingers);
+		output_fn = f.fingers;
+	}
+
+	f.pt.x = output_data[0].x;
+	f.pt.y = output_data[0].y;
+	f.pt.z = output_data[0].z;
+
+	if (output_data[0].z || output_data[1].z ||
+		output_data[2].z || output_data[3].z)
+		input_report_key(dev, BTN_TOUCH, 1);
+	else
+		input_report_key(dev, BTN_TOUCH, 0);
+
+	alps_report_semi_mt_data_ex(dev, 4, output_data);
+
+	input_mt_report_finger_count(dev, output_fn);
+
+	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.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.pt.z);
+
+	input_sync(dev);
+}
+
 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
 					unsigned char packet[],
 					bool report_buttons)
@@ -1152,11 +1998,22 @@  static void alps_flush_packet(unsigned long data)
 	serio_continue_rx(psmouse->ps2dev.serio);
 }
 
+static bool alps_is_valid_package_ss4(struct psmouse *psmouse)
+{
+	if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
+		return false;
+	if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
+		return false;
+	return true;
+}
+
 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
 
-	if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
+	/* Can not distinguish V8's first byte from PS/2 packet's */
+	if ((psmouse->packet[0] & 0xc8) == 0x08 &&
+			priv->proto_version != ALPS_PROTO_V8) {
 		if (psmouse->pktcnt == 3) {
 			alps_report_bare_ps2_packet(psmouse, psmouse->packet,
 						    true);
@@ -1189,8 +2046,10 @@  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)) {
+	if ((priv->proto_version == ALPS_PROTO_V7 &&
+		!alps_is_valid_package_v7(psmouse)) ||
+		(priv->proto_version == ALPS_PROTO_V8 &&
+		!alps_is_valid_package_ss4(psmouse))) {
 		psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
 			    psmouse->pktcnt - 1,
 			    psmouse->packet[psmouse->pktcnt - 1]);
@@ -1309,20 +2168,20 @@  static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
 	return 0;
 }
 
-static bool alps_check_valid_firmware_id(unsigned char id[])
+static int alps_check_valid_firmware_id(unsigned char id[])
 {
-	if (id[0] == 0x73)
-		return true;
+	int valid = 1;
 
-	if (id[0] == 0x88 &&
-	    (id[1] == 0x07 ||
-	     id[1] == 0x08 ||
-	     (id[1] & 0xf0) == 0xb0 ||
-	     (id[1] & 0xf0) == 0xc0)) {
-		return true;
+	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 false;
+	return valid;
 }
 
 static int alps_enter_command_mode(struct psmouse *psmouse)
@@ -1792,45 +2651,6 @@  error:
 	return -1;
 }
 
-static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
-{
-	int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
-	struct alps_data *priv = psmouse->private;
-
-	reg = alps_command_mode_read_reg(psmouse, reg_pitch);
-	if (reg < 0)
-		return reg;
-
-	x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
-	x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
-
-	y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
-	y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
-
-	reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
-	if (reg < 0)
-		return reg;
-
-	x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
-	x_electrode = 17 + x_electrode;
-
-	y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
-	y_electrode = 13 + y_electrode;
-
-	x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
-	y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
-
-	priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
-	priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
-
-	psmouse_dbg(psmouse,
-		    "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
-		    x_pitch, y_pitch, x_electrode, y_electrode,
-		    x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
-
-	return 0;
-}
-
 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
@@ -1851,9 +2671,6 @@  static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
 	    alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
 		goto error;
 
-	if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
-		goto error;
-
 	reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
 	if (reg_val == -1)
 		goto error;
@@ -1878,6 +2695,32 @@  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) ||
+	    alps_command_mode_read_reg(psmouse, 0xc2d9) == -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)
 {
@@ -1967,6 +2810,102 @@  error:
 	return -1;
 }
 
+static int alps_get_otp_values_ss4(struct psmouse *psmouse,
+	unsigned char index, unsigned char otp[])
+{
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+
+	switch (index) {
+	case 0:
+		if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
+		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
+		    ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
+			return -1;
+
+		break;
+
+	case 1:
+		if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
+		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
+		    ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
+			return -1;
+
+		break;
+	}
+
+	return 0;
+}
+
+int alps_update_device_area_ss4_v1(
+	unsigned char otp[][4], struct alps_data *priv)
+{
+	int	num_x_electrode;
+	int	num_y_electrode;
+
+	num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0]		& 0x0F);
+	num_y_electrode = ((otp[1][0] >> 4)	& 0x0F);
+
+	priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
+	priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
+
+	return 0;
+}
+
+int alps_update_device_area_ss4_v2(
+	unsigned char otp[][4], struct alps_data *priv)
+{
+	int	num_x_electrode;
+	int	num_y_electrode;
+
+	num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
+	if ((priv->fw_ver[1] > 2) ||
+		(priv->fw_ver[1] == 2 && priv->fw_ver[2] > 0x33)) {
+		num_y_electrode =
+			SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x07);
+	} else {
+		num_y_electrode = ((otp[1][0] >> 4) & 0x0F);
+	}
+
+	priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
+	priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
+
+	return 0;
+}
+
+int alps_update_btn_info_ss4(unsigned char otp[][4], struct alps_data *priv)
+{
+
+	unsigned char is_btnless = 0;
+
+	is_btnless = (otp[1][1] >> 3) &  0x01;
+
+	if (is_btnless)
+		priv->flags |= ALPS_BTNLESS;
+
+	return 0;
+}
+
+static int alps_set_defaults_ss4(struct psmouse *psmouse,
+					struct alps_data *priv)
+{
+	unsigned char otp[2][4];
+
+	memset(otp, 0, sizeof(otp));
+
+	if (alps_get_otp_values_ss4(psmouse, 0, &otp[0][0]) ||
+	    alps_get_otp_values_ss4(psmouse, 1, &otp[1][0]))
+		return -1;
+
+	if (priv->fw_ver[1] >= 2)
+		alps_update_device_area_ss4_v2(otp, priv);
+	else
+		alps_update_device_area_ss4_v1(otp, priv);
+
+	alps_update_btn_info_ss4(otp, priv);
+
+	return 0;
+}
+
 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
 					struct alps_data *priv)
 {
@@ -2030,28 +2969,54 @@  static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
 	return 0;
 }
 
-static int alps_hw_init_v7(struct psmouse *psmouse)
+static int alps_hw_init_ss3(struct psmouse *psmouse)
 {
 	struct ps2dev *ps2dev = &psmouse->ps2dev;
-	int reg_val, ret = -1;
+	unsigned char	f3param0 = 0x00,
+					f3param1 = 0x00;
 
-	if (alps_enter_command_mode(psmouse) ||
-	    alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
+	if (alps_enter_command_mode(psmouse))
 		goto error;
 
-	if (alps_get_v3_v7_resolution(psmouse, 0xc397))
+	/* Set to 2 pt-mode */
+	f3param0 = 0x50;
+	f3param1 = 0x3c;
+	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
+	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
+	    ps2_command(ps2dev, &f3param0, PSMOUSE_CMD_SETRATE) ||
+	    ps2_command(ps2dev, &f3param1, PSMOUSE_CMD_SETRATE))
 		goto error;
 
-	if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
-		goto error;
+	/* output APDATA when 1 finger is in resting area */
+	f3param0 = 0xc8;
+	f3param1 = 0x28;
+	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
+	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
+	    ps2_command(ps2dev, &f3param0, PSMOUSE_CMD_SETRATE) ||
+	    ps2_command(ps2dev, &f3param1, PSMOUSE_CMD_SETRATE))
+			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))
+	return 0;
+
+error:
+	return -1;
+}
+
+
+static int alps_hw_init_ss4(struct psmouse *psmouse)
+{
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	char param[2] = {0x64, 0x28};
+	int ret = -1;
+
+	/* enter absolute mode */
+	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
+	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
+	    ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
+	    ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
 		goto error;
+	}
 
-	alps_exit_command_mode(psmouse);
 	return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
 
 error:
@@ -2078,6 +3043,7 @@  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;
@@ -2086,6 +3052,7 @@  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;
@@ -2093,6 +3060,7 @@  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;
@@ -2108,6 +3076,7 @@  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;
@@ -2116,6 +3085,7 @@  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 = 1;
 		break;
 	case ALPS_PROTO_V7:
 		priv->hw_init = alps_hw_init_v7;
@@ -2129,8 +3099,44 @@  static void alps_set_defaults(struct alps_data *priv)
 		priv->byte0 = 0x48;
 		priv->mask0 = 0x48;
 
-		if (priv->fw_ver[1] != 0xba)
-			priv->flags |= ALPS_BUTTONPAD;
+		if (priv->fw_ver[1] == 0xBA) {
+			priv->flags = 0;
+			/* No resting finger area */
+			priv->resting_zone_y_min = priv->y_max;
+		} else {
+			priv->flags = ALPS_BTNLESS;
+			priv->resting_zone_y_min = 0x654;
+		}
+
+		priv->slot_number = 2;
+		break;
+	case ALPS_PROTO_V8:
+		if (priv->fw_ver[1] >= 2)
+			priv->decode_fields = alps_decode_ss4_v2;
+		else
+			priv->decode_fields = alps_decode_ss4_v1;
+
+		priv->hw_init = alps_hw_init_ss4;
+		priv->process_packet = alps_process_packet_ss4;
+		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->byte0 = 0x18;
+		priv->mask0 = 0x18;
+		priv->flags = 0;
+		priv->slot_number = 4;
+		break;
+	case ALPS_PROTO_V9:
+		priv->hw_init = alps_hw_init_ss3;
+		priv->process_packet = alps_process_touchpad_packet_ss3;
+		priv->decode_fields = alps_decode_dolphin;
+		priv->set_abs_params = alps_set_abs_params_mt;
+		priv->nibble_commands = alps_v3_nibble_commands;
+		priv->byte0 = 0xc8;
+		priv->mask0 = 0xc8;
+		priv->slot_number = 2;
 		break;
 	}
 }
@@ -2204,7 +3210,7 @@  static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
 		else
 			return 0;
 	} else if (ec[0] == 0x88 &&
-		   ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
+		((ec[1] & 0xf0) == 0xB0 || (ec[1] & 0xf0) == 0xC0)) {
 		priv->proto_version = ALPS_PROTO_V7;
 		alps_set_defaults(priv);
 
@@ -2217,7 +3223,6 @@  static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
 		priv->decode_fields = alps_decode_rushmore;
 		priv->x_bits = 16;
 		priv->y_bits = 12;
-		priv->flags |= ALPS_IS_RUSHMORE;
 
 		/* hack to make addr_command, nibble_command available */
 		psmouse->private = priv;
@@ -2232,6 +3237,22 @@  static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
 		alps_set_defaults(priv);
 
 		return 0;
+	} else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x14) {
+		priv->proto_version = ALPS_PROTO_V8;
+		alps_set_defaults(priv);
+
+		if (alps_set_defaults_ss4(psmouse, priv))
+			return -EIO;
+
+		return 0;
+	} else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0xc8) {
+		priv->proto_version = ALPS_PROTO_V9;
+		alps_set_defaults(priv);
+
+		if (alps_dolphin_get_device_area(psmouse, priv))
+			return -EIO;
+
+		return 0;
 	}
 
 	psmouse_info(psmouse,
@@ -2272,21 +3293,17 @@  static void alps_set_abs_params_st(struct alps_data *priv,
 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, 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);
 
-	input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
-	input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
-
-	input_mt_init_slots(dev1, MAX_TOUCHES, INPUT_MT_POINTER |
-		INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
-
+	set_bit(BTN_TOOL_DOUBLETAP, dev1->keybit);
 	set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
 	set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
 
-	/* V7 is real multi-touch */
-	if (priv->proto_version == ALPS_PROTO_V7)
-		clear_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
+	input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
+	input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
 }
 
 int alps_init(struct psmouse *psmouse)
@@ -2332,9 +3349,7 @@  int alps_init(struct psmouse *psmouse)
 	dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
 
 	priv->set_abs_params(priv, dev1);
-	/* No pressure on V7 */
-	if (priv->proto_version != ALPS_PROTO_V7)
-		input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
+	input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
 
 	if (priv->flags & ALPS_WHEEL) {
 		dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
@@ -2351,14 +3366,12 @@  int alps_init(struct psmouse *psmouse)
 		dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
 		dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
 		dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
-	} else if (priv->flags & ALPS_BUTTONPAD) {
-		set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
-		clear_bit(BTN_RIGHT, dev1->keybit);
 	} else {
 		dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
 	}
 
-	snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
+	snprintf(priv->phys, sizeof(priv->phys),
+		"%s/input1", psmouse->ps2dev.serio->phys);
 	dev2->phys = priv->phys;
 	dev2->name = (priv->flags & ALPS_DUALPOINT) ?
 		     "DualPoint Stick" : "ALPS PS/2 Device";
@@ -2382,7 +3395,8 @@  int alps_init(struct psmouse *psmouse)
 	psmouse->reconnect = alps_reconnect;
 	psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
 
-	/* We are having trouble resyncing ALPS touchpads so disable it for now */
+	/* We are having trouble resyncing ALPS touchpads
+		so disable it for now */
 	psmouse->resync_time = 0;
 
 	return 0;
diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
index 66240b4..55f5193 100644
--- a/drivers/input/mouse/alps.h
+++ b/drivers/input/mouse/alps.h
@@ -12,8 +12,6 @@ 
 #ifndef _ALPS_H
 #define _ALPS_H
 
-#include <linux/input/mt.h>
-
 #define ALPS_PROTO_V1	1
 #define ALPS_PROTO_V2	2
 #define ALPS_PROTO_V3	3
@@ -21,8 +19,17 @@ 
 #define ALPS_PROTO_V5	5
 #define ALPS_PROTO_V6	6
 #define ALPS_PROTO_V7	7	/* t3btl t4s */
+#define ALPS_PROTO_V8	8	/* ss4 */
+#define ALPS_PROTO_V9	9	/* ss3btl */
+
+
+#define MAX_IMG_PT_NUM		5
+#define V7_IMG_PT_NUM		2
 
-#define MAX_TOUCHES	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 */
@@ -45,6 +52,124 @@  enum V7_PACKET_ID {
 	 V7_PACKET_ID_UNKNOWN,
 };
 
+enum SS4_PACKET_ID {
+	SS4_PACKET_ID_IDLE = 0,
+	SS4_PACKET_ID_ONE,
+	SS4_PACKET_ID_TWO,
+	SS4_PACKET_ID_MULTI,
+};
+
+#define SS4_COUNT_PER_ELECTRODE			256
+#define SS4_NUMSENSOR_XOFFSET			7
+#define SS4_NUMSENSOR_YOFFSET			7
+
+/* SWC status( 0:SW OFF, 1: SW ON) */
+#define SS4_BUTTONLESS_BUTTONS	0x01
+
+#define SS4_MASK_NORMAL_BUTTONS	0x07
+
+#define SS4_1F_X_V1(_b)	(((_b[0] << 5) & 0x1E00) | \
+		((_b[0] << 6) & 0x01C0) | \
+		((_b[1] >> 2) & 0x0038) | \
+		((_b[1] >> 1) & 0x0007) \
+		)
+
+#define SS4_1F_Y_V1(_b)	(((_b[2] >> 1) & 0x007F) | \
+		((_b[4] << 5) & 0x0F80) \
+		)
+
+#define SS4_1F_Z_V1(_b)		(_b[5] & 0xFF)
+
+#define	SS4_1F_LFB(_b)		((_b[4] >> 1) & 0x01)
+
+#define SS4_BTN_V1(_b)		(_b[3] & SS4_BUTTONLESS_BUTTONS)
+
+#define SS4_STD_MF_X_V1(_b, _i)	(((_b[0 + _i * 3] >> 2) & 0x0020) | \
+		((_b[1 + _i * 3] << 5) & 0x1FC0) \
+		)
+
+#define SS4_STD_MF_Y_V1(_b, _i)	(((_b[0 + _i * 3] >> 2) & 0x0010) | \
+		((_b[2 + _i * 3] << 4) & 0x0FE0) \
+		)
+
+#define SS4_BTL_BTN_V1(_b)		(_b[3] & SS4_BUTTONLESS_BUTTONS)
+
+#define SS4_BTL_MF_X_V1(_b, _i) (SS4_STD_MF_X_V1(_b, _i) | \
+		((_b[0 + _i * 3] << 2) & 0x0010))
+
+#define SS4_BTL_MF_Y_V1(_b, _i) (SS4_STD_MF_Y_V1(_b, _i) | \
+		((_b[0 + _i * 3] << 2) & 0x0008))
+
+#define SS4_MF_Z_V1(_b, _i)		((_b[0 + _i * 3] >> 4) & 0x0003)
+
+#define SS4_IS_MF_CONTINUE_V1(_b)	((_b[0] & 0x01) == 0x01)
+#define SS4_IS_5F_DETECTED_V1(_b)	((_b[0] & 0x01) == 0x01)
+
+#define SS4_1F_X_V2(_b)	((_b[0] & 0x0007) | \
+		((_b[1] << 3) & 0x0078) | \
+		((_b[1] << 2) & 0x0380) | \
+		((_b[2] << 5) & 0x1C00) \
+		)
+
+#define SS4_1F_Y_V2(_b)	(((_b[2]) & 0x000F) | \
+		((_b[3] >> 2) & 0x0030) | \
+		((_b[4] << 6) & 0x03C0) | \
+		((_b[4] << 5) & 0x0C00) \
+		)
+
+#define SS4_1F_Z_V2(_b)	(((_b[5]) & 0x0F) | \
+		((_b[5] >> 1) & 0x70) | \
+		((_b[4]) & 0x80) \
+		)
+
+#define	SS4_1F_LFB_V2(_b)	(((_b[2] >> 4) & 0x01) == 0x01)
+
+#define	SS4_MF_LF_V2(_b, _i)	((_b[1 + _i * 3] & 0x0004) == 0x0004)
+
+#define SS4_BTN_V2(_b)		((_b[0] >> 5) & SS4_MASK_NORMAL_BUTTONS)
+
+#define SS4_STD_MF_X_V2(_b, _i)	(((_b[0 + _i * 3]  << 5) & 0x00E0) | \
+		((_b[1 + _i * 3]  << 5) & 0x1F00) \
+		)
+
+#define SS4_STD_MF_Y_V2(_b, _i)	(((_b[1 + _i * 3] << 3) & 0x0010) | \
+		((_b[2 + _i * 3] << 5) & 0x01E0) | \
+		((_b[2 + _i * 3] << 4) & 0x0E00) \
+		)
+
+#define SS4_BTL_MF_X_V2(_b, _i)	(SS4_STD_MF_X_V2(_b, _i) | \
+		((_b[0 + _i * 3] >> 3) & 0x0010))
+
+#define SS4_BTL_MF_Y_V2(_b, _i)	(SS4_STD_MF_Y_V2(_b, _i) | \
+		((_b[0 + _i * 3] >> 3) & 0x0008))
+
+#define SS4_MF_Z_V2(_b, _i)	(((_b[1 + _i * 3]) & 0x0001) | \
+		((_b[1 + _i * 3] >> 1) & 0x0002) \
+		)
+
+#define SS4_IS_MF_CONTINUE_V2(_b)	((_b[2] & 0x10) == 0x10)
+#define SS4_IS_5F_DETECTED_V2(_b)	((_b[2] & 0x10) == 0x10)
+
+
+#define SS4_MFPACKET_NO_AX		8160	/* X-Coordinate value */
+#define SS4_MFPACKET_NO_AY		4080	/* Y-Coordinate value */
+#define SS4_MFPACKET_NO_AX_BL	8176	/* Buttonless X-Coordinate value */
+#define SS4_MFPACKET_NO_AY_BL	4088	/* Buttonless Y-Coordinate value */
+
+/* Threshold for resting finger's large movement */
+#define RESTING_FN_LARGE_MOVEMENT	50
+
+#define PT_IN_LEFT_BTN_AREA(_x, _y, _x_max, _y_max)
+		(((_x) < (_x_max)/2) && ((_y) > (_y_max)*4/5))
+
+#define PT_IN_RIGHT_BTN_AREA(_x, _y, _x_max, _y_max)
+		(((_x) >= (_x_max)/2) && ((_y) > (_y_max)*4/5))
+
+#define PT_IN_BTN_AREA(_x, _y, _x_max, _y_max)
+		(PT_IN_LEFT_BTN_AREA(_x, _y, _x_max, _y_max) ||
+		PT_IN_RIGHT_BTN_AREA(_x, _y, _x_max, _y_max)
+		)
+
 /**
  * struct alps_model_info - touchpad ID table
  * @signature: E7 response string to match.
@@ -68,7 +193,7 @@  struct alps_model_info {
 	unsigned char command_mode_resp;
 	unsigned char proto_version;
 	unsigned char byte0, mask0;
-	int flags;
+	unsigned int flags;
 };
 
 /**
@@ -87,47 +212,95 @@  struct alps_nibble_commands {
 	unsigned char data;
 };
 
-struct alps_bitmap_point {
-	int start_bit;
-	int num_bits;
+/**
+ * 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.
+ * @ts_left: Left trackstick button is active.
+ * @ts_right: Right trackstick button is active.
+ * @ts_middle: Middle trackstick button is active.
+ */
+struct alps_btn {
+	unsigned int left:1;
+	unsigned int right:1;
+	unsigned int middle:1;
+
+	unsigned int ts_left:1;
+	unsigned int ts_right:1;
+	unsigned int ts_middle:1;
+};
+
+/**
+ * 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;
+};
+
+enum dol_Packet {
+	DOL_UNKNOWN,
+	DOL_GPDATA,
+	DOL_PROFDATA,
+	DOL_APDATA
 };
 
 /**
  * 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.
- * @fingers: Number of fingers for MT.
- * @pressure: Pressure.
- * @st: position for ST.
- * @mt: position for MT.
  * @first_mp: Packet is the first of a multi-packet report.
  * @is_mp: Packet is part of a multi-packet report.
- * @left: Left touchpad button is active.
- * @right: Right touchpad button is active.
- * @middle: Middle touchpad button is active.
- * @ts_left: Left trackstick button is active.
- * @ts_right: Right trackstick button is active.
- * @ts_middle: Middle trackstick button is active.
+ * @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 fingers;
-
-	int pressure;
-	struct input_mt_pos st;
-	struct input_mt_pos mt[MAX_TOUCHES];
-
+	unsigned int large_fn;
 	unsigned int first_mp:1;
 	unsigned int is_mp:1;
+	enum dol_Packet	dol_packet_type;
+	struct alps_btn btn;
+};
 
-	unsigned int left:1;
-	unsigned int right:1;
-	unsigned int middle:1;
+/**
+ * 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.
+ */
+struct v7_raw {
+	unsigned char pkt_id;
+	unsigned int additional_fingers;
+	unsigned char rest_left;
+	unsigned char rest_right;
+};
 
-	unsigned int ts_left:1;
-	unsigned int ts_right:1;
-	unsigned int ts_middle:1;
+/**
+ * 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.
+ */
+struct alps_bl_pt_attr {
+	unsigned char zone;
+	unsigned char is_counted;
+	unsigned char is_init_pt_got;
+	struct alps_abs_data init_pt;
 };
 
 /**
@@ -142,12 +315,13 @@  struct alps_fields {
  *   known format for this model.  The first byte of the report, ANDed with
  *   mask0, should match byte0.
  * @mask0: The mask used to check the first byte of the report.
- * @fw_ver: cached copy of firmware version (EC report)
  * @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.
@@ -155,9 +329,18 @@  struct alps_fields {
  * @prev_fin: Finger bit from previous packet.
  * @multi_packet: Multi-packet data in progress.
  * @multi_data: Saved multi-packet data.
- * @f: Decoded packet data fields.
+ * @x1: First X coordinate from last MT report.
+ * @x2: Second X coordinate from last MT report.
+ * @y1: First Y coordinate from last MT report.
+ * @y2: Second Y coordinate from last MT report.
+ * @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;
@@ -168,27 +351,35 @@  struct alps_data {
 	int addr_command;
 	unsigned char proto_version;
 	unsigned char byte0, mask0;
+	unsigned int flags;
 	unsigned char fw_ver[3];
-	int flags;
 	int x_max;
 	int y_max;
+	int resting_zone_y_min;
 	int x_bits;
 	int y_bits;
-	unsigned int x_res;
-	unsigned int y_res;
+	unsigned char slot_number;
 
 	int (*hw_init)(struct psmouse *psmouse);
 	void (*process_packet)(struct psmouse *psmouse);
-	int (*decode_fields)(struct alps_fields *f, unsigned char *p,
+	void (*decode_fields)(struct alps_fields *f, unsigned char *p,
 			      struct psmouse *psmouse);
 	void (*set_abs_params)(struct alps_data *priv, struct input_dev *dev1);
 
 	int prev_fin;
 	int multi_packet;
 	unsigned char multi_data[6];
-	struct alps_fields f;
+	int x1, x2, y1, y2;
+	int fingers;
 	u8 quirks;
 	struct timer_list timer;
+
+	/* these are used for buttonless touchpad*/
+	union {
+		struct v7_raw v7;
+	} r;
+	struct alps_btn prev_btn;
+	struct alps_bl_pt_attr pt_attr[MAX_IMG_PT_NUM];
 };
 
 #define ALPS_QUIRK_TRACKSTICK_BUTTONS	1 /* trakcstick buttons in trackstick packet */