>From Masaki Ota <[email protected]>

<ChangePoint>
- Support SS4 device as ALPS_PROT_V8
- SS4 device has two types. One is a button type, the other is a buttonless 
type.
- SS4 supports four-finger data.
---
Signed-off-by: Masaki Ota <[email protected]>
---
 drivers/input/mouse/alps.c | 472 +++++++++++++++++++++++++++++++++++++++++++--
 drivers/input/mouse/alps.h |  94 ++++++++-
 2 files changed, 554 insertions(+), 12 deletions(-)

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index d28726a..57b7cbd 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -153,6 +153,10 @@ static const struct alps_protocol_info 
alps_v7_protocol_data = {
        ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
 };
 
+static const struct alps_protocol_info alps_v8_protocol_data = {
+       ALPS_PROTO_V8, 0x18, 0x18, 0
+};
+
 static void alps_set_abs_params_st(struct alps_data *priv,
                                   struct input_dev *dev1);
 static void alps_set_abs_params_mt(struct alps_data *priv,
@@ -436,12 +440,15 @@ static int alps_process_bitmap(struct alps_data *priv,
        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)
@@ -453,7 +460,7 @@ static void alps_report_mt_data(struct psmouse *psmouse, 
int n)
 
        input_mt_assign_slots(dev, slot, f->mt, n, 0);
        for (i = 0; i < n; i++)
-               alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
+               alps_set_slot(dev, slot[i], 1, f->mt[i].x, f->mt[i].y);
 
        input_mt_sync_frame(dev);
 }
@@ -1085,6 +1092,325 @@ static void alps_process_packet_v7(struct psmouse 
*psmouse)
                alps_process_touchpad_packet_v7(psmouse);
 }
 
+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->left)
+               return;
+
+       /* Clear button flag */
+       f->left = 0;
+
+       switch (f->fingers) {
+       case 1:
+               /* In Left Resting Area */
+               if (PT_IN_LEFT_BTN_AREA(f->mt[0].x, f->mt[0].y,
+                       priv->x_max, priv->y_max)) {
+                       f->left = 1;
+               /* In Right Resting Area */
+               } else if (PT_IN_RIGHT_BTN_AREA(f->mt[0].x, f->mt[0].y,
+                       priv->x_max, priv->y_max)) {
+                       f->right = 1;
+               /* In Normal area */
+               } else {
+                       f->left = 1;
+               }
+               break;
+
+       case 2:
+               /* Both two fingers are in Normal area */
+               if (!PT_IN_BTN_AREA(f->mt[0].x, f->mt[0].y,
+                       priv->x_max, priv->y_max) &&
+                       !PT_IN_BTN_AREA(f->mt[1].x, f->mt[1].y,
+                       priv->x_max, priv->y_max)) {
+                       f->right = 1;
+               /* Either one finger is in Right Area */
+               } else if (PT_IN_RIGHT_BTN_AREA(f->mt[0].x, f->mt[0].y,
+                       priv->x_max, priv->y_max) ||
+                       PT_IN_RIGHT_BTN_AREA(f->mt[1].x, f->mt[1].y,
+                       priv->x_max, priv->y_max)) {
+                       f->right = 1;
+               } else {
+                       f->left = 1;
+               }
+               break;
+
+       case 3:
+               f->middle = 1;
+               break;
+
+       case 0:
+       default:
+               break;
+       }
+}
+
+static void alps_process_resting_finger(struct psmouse *psmouse,
+       struct alps_fields *f, struct input_mt_pos *output,
+       unsigned char *p_fn)
+{
+       struct alps_data *priv = psmouse->private;
+       static struct input_mt_pos prev_data[10];
+       static unsigned char is_moved[10];
+       static unsigned char prev_fn;
+       unsigned char in_resting_area[10];
+       unsigned char i, index;
+       unsigned char output_fn = 0;
+
+       memset(in_resting_area, 0, sizeof(in_resting_area));
+
+       /* Simulate finger lift when finger number changed */
+       if (f->fingers != prev_fn) {
+               memset(is_moved, 0, sizeof(is_moved));
+               output_fn = 0;
+               goto end;
+       }
+
+       /* Calculate output finger */
+       for (i = 0, index = 0; i < f->fingers; i++) {
+               if (is_moved[i] == 0 &&
+                       (abs(f->mt[i].x - prev_data[i].x)
+                       > RESTING_FN_LARGE_MOVEMENT)) {
+                       is_moved[i] = 1;
+               }
+
+               /* Check if in resting area */
+               if (PT_IN_BTN_AREA(f->mt[i].x, f->mt[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->mt[i],
+                               sizeof(struct input_mt_pos));
+                       output_fn++;
+               }
+       }
+
+end:
+       memcpy(prev_data, f->mt, sizeof(f->mt));
+       prev_fn = f->fingers;
+       *p_fn = output_fn;
+}
+
+static int 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 0;
+
+       pkt_id = alps_get_pkt_id_ss4_v2(p);
+
+       /* Current packet is 1Finger coordinate packet */
+       switch (pkt_id) {
+       case SS4_PACKET_ID_ONE:
+               f->mt[0].x = SS4_1F_X_V2(p);
+               f->mt[0].y = SS4_1F_Y_V2(p);
+               f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
+               f->fingers = 1;
+               f->first_mp = 0;
+               f->is_mp = 0;
+               break;
+
+       case SS4_PACKET_ID_TWO:
+               if (priv->flags & ALPS_BUTTONPAD) {
+                       f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
+                       f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
+                       f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
+                       f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
+               } else {
+                       f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
+                       f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
+                       f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
+                       f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
+               }
+               f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
+
+               if (SS4_IS_MF_CONTINUE(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_BUTTONPAD) {
+                       f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
+                       f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
+                       f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
+                       f->mt[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->mt[2].x = SS4_STD_MF_X_V2(p, 0);
+                       f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
+                       f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
+                       f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
+                       no_data_x = SS4_MFPACKET_NO_AX;
+                       no_data_y = SS4_MFPACKET_NO_AY;
+               }
+
+               f->first_mp = 0;
+               f->is_mp = 1;
+
+               if (SS4_IS_5F_DETECTED(p)) {
+                       f->fingers = 5;
+               } else if (f->mt[3].x == no_data_x &&
+                            f->mt[3].y == no_data_y) {
+                       f->mt[3].x = 0;
+                       f->mt[3].y = 0;
+                       f->fingers = 3;
+               } else {
+                       f->fingers = 4;
+               }
+               break;
+
+       case SS4_PACKET_ID_IDLE:
+       default:
+               memset(f, 0, sizeof(struct alps_fields));
+               break;
+       }
+
+       f->left = !!(SS4_BTN_V2(p) & 0x01);
+       if (!(priv->flags & ALPS_BUTTONPAD)) {
+               f->right = !!(SS4_BTN_V2(p) & 0x02);
+               f->middle = !!(SS4_BTN_V2(p) & 0x04);
+       }
+
+       return 0;
+}
+
+static void alps_process_packet_ss4_v2(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 input_mt_pos output_data[5];
+       unsigned char output_fn;
+       int i;
+
+       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_BUTTONPAD) {
+               alps_process_resting_finger(psmouse, &f,
+                       output_data, &output_fn);
+               alps_process_btnless_click(psmouse, &f);
+       } else {
+               memcpy(&output_data[0], &f.mt[0],
+                       sizeof(struct input_mt_pos) * f.fingers);
+               output_fn = f.fingers;
+       }
+
+       f.x = output_data[0].x;
+       f.y = output_data[0].y;
+       if (f.x && f.y)
+               f.z = f.pressure;
+
+       if (f.pressure)
+               input_report_key(dev, BTN_TOUCH, 1);
+       else
+               input_report_key(dev, BTN_TOUCH, 0);
+
+       for (i = 0; i < 4; i++) {
+               if (!output_data[i].x || !output_data[i].y) {
+                       alps_set_slot(dev, i, 0,
+                               output_data[i].x, output_data[i].y);
+               } else {
+                       alps_set_slot(dev, i, 1,
+                               output_data[i].x, output_data[i].y);
+               }
+       }
+
+       input_mt_report_finger_count(dev, output_fn);
+
+       input_report_key(dev, BTN_LEFT, f.left);
+       input_report_key(dev, BTN_RIGHT, f.right);
+       input_report_key(dev, BTN_MIDDLE, f.middle);
+
+       if (f.z > 0) {
+               input_report_abs(dev, ABS_X, f.x);
+               input_report_abs(dev, ABS_Y, f.y);
+       }
+       input_report_abs(dev, ABS_PRESSURE, f.z);
+
+       input_sync(dev);
+}
+
+static bool alps_is_valid_package_ss4_v2(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 DEFINE_MUTEX(alps_mutex);
 
 static void alps_register_bare_ps2_mouse(struct work_struct *work)
@@ -1287,8 +1613,10 @@ static psmouse_ret_t alps_process_byte(struct psmouse 
*psmouse)
         * a device connected to the external PS/2 port. Because bare PS/2
         * protocol does not have enough constant bits to self-synchronize
         * properly we only do this if the device is fully synchronized.
+        * Can not distinguish V8's first byte from PS/2 packet's
         */
-       if (!psmouse->out_of_sync_cnt && (psmouse->packet[0] & 0xc8) == 0x08) {
+       if (!psmouse->out_of_sync_cnt && (psmouse->packet[0] & 0xc8) == 0x08 &&
+               priv->proto_version != ALPS_PROTO_V8) {
 
                /* Register dev3 mouse if we received PS/2 packet first time */
                if (unlikely(!priv->dev3))
@@ -1345,8 +1673,10 @@ 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_v2(psmouse))) {
                psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
                            psmouse->pktcnt - 1,
                            psmouse->packet[psmouse->pktcnt - 1]);
@@ -2121,6 +2451,77 @@ error:
        return -1;
 }
 
+static int alps_get_otp_values_ss4_v2(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_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);
+       num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((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_v2(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_BUTTONPAD;
+
+       return 0;
+}
+
+static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
+                       struct alps_data *priv)
+{
+       unsigned char otp[2][4];
+
+       memset(otp, 0, sizeof(otp));
+
+       if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
+           alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
+               return -1;
+
+       alps_update_device_area_ss4_v2(otp, priv);
+
+       alps_update_btn_info_ss4_v2(otp, priv);
+
+       return 0;
+}
+
 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
                                        struct alps_data *priv)
 {
@@ -2213,6 +2614,37 @@ error:
        return ret;
 }
 
+static int alps_hw_init_ss4_v2(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;
+       }
+
+#if 1
+       /* T.B.D. Decread noise packet number, delete in the future */
+       if (alps_exit_command_mode(psmouse) ||
+           alps_enter_command_mode(psmouse) ||
+           alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
+               goto error;
+       }
+       alps_exit_command_mode(psmouse);
+#endif
+
+       return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
+
+error:
+       alps_exit_command_mode(psmouse);
+       return ret;
+}
+
 static int alps_set_protocol(struct psmouse *psmouse,
                             struct alps_data *priv,
                             const struct alps_protocol_info *protocol)
@@ -2311,6 +2743,20 @@ static int alps_set_protocol(struct psmouse *psmouse,
                        priv->flags |= ALPS_BUTTONPAD;
 
                break;
+
+       case ALPS_PROTO_V8:
+               priv->hw_init = alps_hw_init_ss4_v2;
+               priv->process_packet = alps_process_packet_ss4_v2;
+               priv->decode_fields = alps_decode_ss4_v2;
+               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;
+               if (alps_set_defaults_ss4_v2(psmouse, priv))
+                       return -EIO;
+
+               break;
        }
 
        return 0;
@@ -2379,6 +2825,9 @@ static int alps_identify(struct psmouse *psmouse, struct 
alps_data *priv)
                } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
                           ec[2] >= 0x90 && ec[2] <= 0x9d) {
                        protocol = &alps_v3_protocol_data;
+               } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
+                               e7[2] == 0x14 && ec[1] == 0x02) {
+                                       protocol = &alps_v8_protocol_data;
                } else {
                        psmouse_dbg(psmouse,
                                    "Likely not an ALPS touchpad: E7=%3ph, 
EC=%3ph\n", e7, ec);
@@ -2444,8 +2893,9 @@ static void alps_set_abs_params_mt(struct alps_data *priv,
        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)
+       /* V7,V8 is real multi-touch */
+       if (priv->proto_version == ALPS_PROTO_V7 ||
+               priv->proto_version == ALPS_PROTO_V8)
                clear_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
 }
 
@@ -2498,7 +2948,7 @@ 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) {
+       } else if (priv->proto_version == ALPS_PROTO_V7) {
                set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
                clear_bit(BTN_RIGHT, dev1->keybit);
        } else {
diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
index 02513c0..fd913f2 100644
--- a/drivers/input/mouse/alps.h
+++ b/drivers/input/mouse/alps.h
@@ -22,14 +22,103 @@
 #define ALPS_PROTO_V5          0x500
 #define ALPS_PROTO_V6          0x600
 #define ALPS_PROTO_V7          0x700   /* t3btl t4s */
+#define ALPS_PROTO_V8          0x800   /* SS4btl SS4s */
 
-#define MAX_TOUCHES    2
+#define MAX_TOUCHES    4
 
 #define DOLPHIN_COUNT_PER_ELECTRODE    64
 #define DOLPHIN_PROFILE_XOFFSET                8       /* x-electrode offset */
 #define DOLPHIN_PROFILE_YOFFSET                1       /* y-electrode offset */
 
 /*
+ * enum SS4_PACKET_ID - defines the packet type for V8
+ * SS4_PACKET_ID_IDLE: There's no finger and no button activity.
+ * SS4_PACKET_ID_ONE: There's one finger on touchpad
+ *  or there's button activities.
+ * SS4_PACKET_ID_TWO: There's two or more fingers on touchpad
+ * SS4_PACKET_ID_MULTI: There's three or more fingers on touchpad
+*/
+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
+
+#define SS4_MASK_NORMAL_BUTTONS        0x07
+
+#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(_b) ((_b[2] & 0x10) == 0x10)
+#define SS4_IS_5F_DETECTED(_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) \
+       )
+
+/*
  * enum V7_PACKET_ID - defines the packet type for V7
  * V7_PACKET_ID_IDLE: There's no finger and no button activity.
  * V7_PACKET_ID_TWO: There's one or two non-resting fingers on touchpad
@@ -122,6 +211,9 @@ struct alps_fields {
        unsigned int x_map;
        unsigned int y_map;
        unsigned int fingers;
+       unsigned int x;
+       unsigned int y;
+       unsigned int z;
 
        int pressure;
        struct input_mt_pos st;
-- 
2.1.0

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