Merge branch 'next' into for-linus

14 files changed, 1363 insertions, 345 deletions

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 99d58764ef03..003587c71f43 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -23,13 +23,6 @@
 #include "psmouse.h"
 #include "alps.h"
 
-#undef DEBUG
-#ifdef DEBUG
-#define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
-#else
-#define dbg(format, arg...) do {} while (0)
-#endif
-
 #define ALPS_OLDPROTO		0x01	/* old style input */
 #define ALPS_DUALPOINT		0x02	/* touchpad has trackstick */
 #define ALPS_PASS		0x04	/* device has a pass-through port */
@@ -297,10 +290,10 @@ static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 		      psmouse->packet[4] |
 		      psmouse->packet[5]) & 0x80) ||
 		    (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
-			dbg("refusing packet %x %x %x %x "
-			    "(suspected interleaved ps/2)\n",
-			    psmouse->packet[3], psmouse->packet[4],
-			    psmouse->packet[5], psmouse->packet[6]);
+			psmouse_dbg(psmouse,
+				    "refusing packet %x %x %x %x (suspected interleaved ps/2)\n",
+				    psmouse->packet[3], psmouse->packet[4],
+				    psmouse->packet[5], psmouse->packet[6]);
 			return PSMOUSE_BAD_DATA;
 		}
 
@@ -319,13 +312,13 @@ static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
 		 * There is also possibility that we got 6-byte ALPS
 		 * packet followed  by 3-byte packet from trackpoint. We
 		 * can not distinguish between these 2 scenarios but
-		 * becase the latter is unlikely to happen in course of
+		 * because the latter is unlikely to happen in course of
 		 * normal operation (user would need to press all
 		 * buttons on the pad and start moving trackpoint
 		 * without touching the pad surface) we assume former.
 		 * Even if we are wrong the wost thing that would happen
 		 * the cursor would jump but we should not get protocol
-		 * desynchronization.
+		 * de-synchronization.
 		 */
 
 		alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
@@ -361,10 +354,10 @@ static void alps_flush_packet(unsigned long data)
 		if ((psmouse->packet[3] |
 		     psmouse->packet[4] |
 		     psmouse->packet[5]) & 0x80) {
-			dbg("refusing packet %x %x %x "
-			    "(suspected interleaved ps/2)\n",
-			    psmouse->packet[3], psmouse->packet[4],
-			    psmouse->packet[5]);
+			psmouse_dbg(psmouse,
+				    "refusing packet %x %x %x (suspected interleaved ps/2)\n",
+				    psmouse->packet[3], psmouse->packet[4],
+				    psmouse->packet[5]);
 		} else {
 			alps_process_packet(psmouse);
 		}
@@ -396,16 +389,18 @@ static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 	}
 
 	if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
-		dbg("refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
-		    psmouse->packet[0], model->mask0, model->byte0);
+		psmouse_dbg(psmouse,
+			    "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
+			    psmouse->packet[0], model->mask0, model->byte0);
 		return PSMOUSE_BAD_DATA;
 	}
 
 	/* Bytes 2 - 6 should have 0 in the highest bit */
 	if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 	    (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
-		dbg("refusing packet[%i] = %x\n",
-		    psmouse->pktcnt - 1, psmouse->packet[psmouse->pktcnt - 1]);
+		psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
+			    psmouse->pktcnt - 1,
+			    psmouse->packet[psmouse->pktcnt - 1]);
 		return PSMOUSE_BAD_DATA;
 	}
 
@@ -439,7 +434,8 @@ static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int
 	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 		return NULL;
 
-	dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
+	psmouse_dbg(psmouse, "E6 report: %2.2x %2.2x %2.2x",
+		    param[0], param[1], param[2]);
 
 	if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 		return NULL;
@@ -459,7 +455,8 @@ static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int
 	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 		return NULL;
 
-	dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
+	psmouse_dbg(psmouse, "E7 report: %2.2x %2.2x %2.2x",
+		    param[0], param[1], param[2]);
 
 	if (version) {
 		for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
@@ -527,7 +524,8 @@ static int alps_get_status(struct psmouse *psmouse, char *param)
 	    ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 		return -1;
 
-	dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
+	psmouse_dbg(psmouse, "Status: %2.2x %2.2x %2.2x",
+		    param[0], param[1], param[2]);
 
 	return 0;
 }
@@ -605,12 +603,12 @@ static int alps_hw_init(struct psmouse *psmouse)
 	}
 
 	if (alps_tap_mode(psmouse, true)) {
-		printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
+		psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
 		return -1;
 	}
 
 	if (alps_absolute_mode(psmouse)) {
-		printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
+		psmouse_err(psmouse, "Failed to enable absolute mode\n");
 		return -1;
 	}
 
@@ -621,7 +619,7 @@ static int alps_hw_init(struct psmouse *psmouse)
 
 	/* ALPS needs stream mode, otherwise it won't report any data */
 	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
-		printk(KERN_ERR "alps.c: Failed to enable stream mode\n");
+		psmouse_err(psmouse, "Failed to enable stream mode\n");
 		return -1;
 	}
 
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 32503565faf9..09b93b11a274 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -10,8 +10,6 @@
  * Trademarks are the property of their respective owners.
  */
 
-#define pr_fmt(fmt) KBUILD_BASENAME ": " fmt
-
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/module.h>
@@ -25,13 +23,10 @@
 #define elantech_debug(fmt, ...)					\
 	do {								\
 		if (etd->debug)						\
-			printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);	\
+			psmouse_printk(KERN_DEBUG, psmouse,		\
+					fmt, ##__VA_ARGS__);		\
 	} while (0)
 
-static bool force_elantech;
-module_param_named(force_elantech, force_elantech, bool, 0644);
-MODULE_PARM_DESC(force_elantech, "Force the Elantech PS/2 protocol extension to be used, 1 = enabled, 0 = disabled (default).");
-
 /*
  * Send a Synaptics style sliced query command
  */
@@ -40,7 +35,7 @@ static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c,
 {
 	if (psmouse_sliced_command(psmouse, c) ||
 	    ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
-		pr_err("synaptics_send_cmd query 0x%02x failed.\n", c);
+		psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c);
 		return -1;
 	}
 
@@ -69,7 +64,7 @@ static int elantech_ps2_command(struct psmouse *psmouse,
 	} while (tries > 0);
 
 	if (rc)
-		pr_err("ps2 command 0x%02x failed.\n", command);
+		psmouse_err(psmouse, "ps2 command 0x%02x failed.\n", command);
 
 	return rc;
 }
@@ -84,7 +79,7 @@ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
 	unsigned char param[3];
 	int rc = 0;
 
-	if (reg < 0x10 || reg > 0x26)
+	if (reg < 0x07 || reg > 0x26)
 		return -1;
 
 	if (reg > 0x11 && reg < 0x20)
@@ -108,12 +103,24 @@ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
 			rc = -1;
 		}
 		break;
+
+	case 3 ... 4:
+		if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+		    elantech_ps2_command(psmouse, NULL, reg) ||
+		    elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) {
+			rc = -1;
+		}
+		break;
 	}
 
 	if (rc)
-		pr_err("failed to read register 0x%02x.\n", reg);
-	else
+		psmouse_err(psmouse, "failed to read register 0x%02x.\n", reg);
+	else if (etd->hw_version != 4)
 		*val = param[0];
+	else
+		*val = param[1];
 
 	return rc;
 }
@@ -127,7 +134,7 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
 	struct elantech_data *etd = psmouse->private;
 	int rc = 0;
 
-	if (reg < 0x10 || reg > 0x26)
+	if (reg < 0x07 || reg > 0x26)
 		return -1;
 
 	if (reg > 0x11 && reg < 0x20)
@@ -154,11 +161,38 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
 			rc = -1;
 		}
 		break;
+
+	case 3:
+		if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+		    elantech_ps2_command(psmouse, NULL, reg) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+		    elantech_ps2_command(psmouse, NULL, val) ||
+		    elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
+			rc = -1;
+		}
+		break;
+
+	case 4:
+		if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+		    elantech_ps2_command(psmouse, NULL, reg) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
+		    elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+		    elantech_ps2_command(psmouse, NULL, val) ||
+		    elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
+			rc = -1;
+		}
+		break;
 	}
 
 	if (rc)
-		pr_err("failed to write register 0x%02x with value 0x%02x.\n",
-			reg, val);
+		psmouse_err(psmouse,
+			    "failed to write register 0x%02x with value 0x%02x.\n",
+			    reg, val);
 
 	return rc;
 }
@@ -166,13 +200,13 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
 /*
  * Dump a complete mouse movement packet to the syslog
  */
-static void elantech_packet_dump(unsigned char *packet, int size)
+static void elantech_packet_dump(struct psmouse *psmouse)
 {
 	int	i;
 
-	printk(KERN_DEBUG pr_fmt("PS/2 packet ["));
-	for (i = 0; i < size; i++)
-		printk("%s0x%02x ", (i) ? ", " : " ", packet[i]);
+	psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [");
+	for (i = 0; i < psmouse->pktsize; i++)
+		printk("%s0x%02x ", i ? ", " : " ", psmouse->packet[i]);
 	printk("]\n");
 }
 
@@ -223,7 +257,7 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse)
 		input_report_abs(dev, ABS_X,
 			((packet[1] & 0x0c) << 6) | packet[2]);
 		input_report_abs(dev, ABS_Y,
-			ETP_YMAX_V1 - (((packet[1] & 0x03) << 8) | packet[3]));
+			etd->y_max - (((packet[1] & 0x03) << 8) | packet[3]));
 	}
 
 	input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
@@ -233,7 +267,7 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse)
 	input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
 
 	if (etd->fw_version < 0x020000 &&
-	    (etd->capabilities & ETP_CAP_HAS_ROCKER)) {
+	    (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
 		/* rocker up */
 		input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
 		/* rocker down */
@@ -273,11 +307,11 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
 	struct elantech_data *etd = psmouse->private;
 	struct input_dev *dev = psmouse->dev;
 	unsigned char *packet = psmouse->packet;
-	unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0, width = 0, pres = 0;
+	unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
+	unsigned int width = 0, pres = 0;
 
 	/* byte 0: n1  n0   .   .   .   .   R   L */
 	fingers = (packet[0] & 0xc0) >> 6;
-	input_report_key(dev, BTN_TOUCH, fingers != 0);
 
 	switch (fingers) {
 	case 3:
@@ -290,18 +324,15 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
 		/* pass through... */
 	case 1:
 		/*
-		 * byte 1:  .   .   .   .   .  x10 x9  x8
+		 * byte 1:  .   .   .   .  x11 x10 x9  x8
 		 * byte 2: x7  x6  x5  x4  x4  x2  x1  x0
 		 */
-		x1 = ((packet[1] & 0x07) << 8) | packet[2];
+		x1 = ((packet[1] & 0x0f) << 8) | packet[2];
 		/*
-		 * byte 4:  .   .   .   .   .   .  y9  y8
+		 * byte 4:  .   .   .   .  y11 y10 y9  y8
 		 * byte 5: y7  y6  y5  y4  y3  y2  y1  y0
 		 */
-		y1 = ETP_YMAX_V2 - (((packet[4] & 0x03) << 8) | packet[5]);
-
-		input_report_abs(dev, ABS_X, x1);
-		input_report_abs(dev, ABS_Y, y1);
+		y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
 
 		pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
 		width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
@@ -314,22 +345,18 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
 		 * byte 0:  .   .  ay8 ax8  .   .   .   .
 		 * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
 		 */
-		x1 = ((packet[0] & 0x10) << 4) | packet[1];
+		x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2;
 		/* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
-		y1 = ETP_2FT_YMAX - (((packet[0] & 0x20) << 3) | packet[2]);
+		y1 = etd->y_max -
+			((((packet[0] & 0x20) << 3) | packet[2]) << 2);
 		/*
 		 * byte 3:  .   .  by8 bx8  .   .   .   .
 		 * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0
 		 */
-		x2 = ((packet[3] & 0x10) << 4) | packet[4];
+		x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2;
 		/* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
-		y2 = ETP_2FT_YMAX - (((packet[3] & 0x20) << 3) | packet[5]);
-		/*
-		 * For compatibility with the X Synaptics driver scale up
-		 * one coordinate and report as ordinary mouse movent
-		 */
-		input_report_abs(dev, ABS_X, x1 << 2);
-		input_report_abs(dev, ABS_Y, y1 << 2);
+		y2 = etd->y_max -
+			((((packet[3] & 0x20) << 3) | packet[5]) << 2);
 
 		/* Unknown so just report sensible values */
 		pres = 127;
@@ -337,6 +364,11 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
 		break;
 	}
 
+	input_report_key(dev, BTN_TOUCH, fingers != 0);
+	if (fingers != 0) {
+		input_report_abs(dev, ABS_X, x1);
+		input_report_abs(dev, ABS_Y, y1);
+	}
 	elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
 	input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
 	input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
@@ -352,7 +384,208 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
 	input_sync(dev);
 }
 
-static int elantech_check_parity_v1(struct psmouse *psmouse)
+/*
+ * Interpret complete data packets and report absolute mode input events for
+ * hardware version 3. (12 byte packets for two fingers)
+ */
+static void elantech_report_absolute_v3(struct psmouse *psmouse,
+					int packet_type)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct elantech_data *etd = psmouse->private;
+	unsigned char *packet = psmouse->packet;
+	unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
+	unsigned int width = 0, pres = 0;
+
+	/* byte 0: n1  n0   .   .   .   .   R   L */
+	fingers = (packet[0] & 0xc0) >> 6;
+
+	switch (fingers) {
+	case 3:
+	case 1:
+		/*
+		 * byte 1:  .   .   .   .  x11 x10 x9  x8
+		 * byte 2: x7  x6  x5  x4  x4  x2  x1  x0
+		 */
+		x1 = ((packet[1] & 0x0f) << 8) | packet[2];
+		/*
+		 * byte 4:  .   .   .   .  y11 y10 y9  y8
+		 * byte 5: y7  y6  y5  y4  y3  y2  y1  y0
+		 */
+		y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
+		break;
+
+	case 2:
+		if (packet_type == PACKET_V3_HEAD) {
+			/*
+			 * byte 1:   .    .    .    .  ax11 ax10 ax9  ax8
+			 * byte 2: ax7  ax6  ax5  ax4  ax3  ax2  ax1  ax0
+			 */
+			etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2];
+			/*
+			 * byte 4:   .    .    .    .  ay11 ay10 ay9  ay8
+			 * byte 5: ay7  ay6  ay5  ay4  ay3  ay2  ay1  ay0
+			 */
+			etd->mt[0].y = etd->y_max -
+				(((packet[4] & 0x0f) << 8) | packet[5]);
+			/*
+			 * wait for next packet
+			 */
+			return;
+		}
+
+		/* packet_type == PACKET_V3_TAIL */
+		x1 = etd->mt[0].x;
+		y1 = etd->mt[0].y;
+		x2 = ((packet[1] & 0x0f) << 8) | packet[2];
+		y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
+		break;
+	}
+
+	pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
+	width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
+
+	input_report_key(dev, BTN_TOUCH, fingers != 0);
+	if (fingers != 0) {
+		input_report_abs(dev, ABS_X, x1);
+		input_report_abs(dev, ABS_Y, y1);
+	}
+	elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
+	input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
+	input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
+	input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
+	input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
+	input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
+	input_report_abs(dev, ABS_PRESSURE, pres);
+	input_report_abs(dev, ABS_TOOL_WIDTH, width);
+
+	input_sync(dev);
+}
+
+static void elantech_input_sync_v4(struct psmouse *psmouse)
+{
+	struct input_dev *dev = psmouse->dev;
+	unsigned char *packet = psmouse->packet;
+
+	input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
+	input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
+	input_mt_report_pointer_emulation(dev, true);
+	input_sync(dev);
+}
+
+static void process_packet_status_v4(struct psmouse *psmouse)
+{
+	struct input_dev *dev = psmouse->dev;
+	unsigned char *packet = psmouse->packet;
+	unsigned fingers;
+	int i;
+
+	/* notify finger state change */
+	fingers = packet[1] & 0x1f;
+	for (i = 0; i < ETP_MAX_FINGERS; i++) {
+		if ((fingers & (1 << i)) == 0) {
+			input_mt_slot(dev, i);
+			input_mt_report_slot_state(dev, MT_TOOL_FINGER, false);
+		}
+	}
+
+	elantech_input_sync_v4(psmouse);
+}
+
+static void process_packet_head_v4(struct psmouse *psmouse)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct elantech_data *etd = psmouse->private;
+	unsigned char *packet = psmouse->packet;
+	int id = ((packet[3] & 0xe0) >> 5) - 1;
+	int pres, traces;
+
+	if (id < 0)
+		return;
+
+	etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2];
+	etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
+	pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
+	traces = (packet[0] & 0xf0) >> 4;
+
+	input_mt_slot(dev, id);
+	input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
+
+	input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
+	input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
+	input_report_abs(dev, ABS_MT_PRESSURE, pres);
+	input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width);
+	/* report this for backwards compatibility */
+	input_report_abs(dev, ABS_TOOL_WIDTH, traces);
+
+	elantech_input_sync_v4(psmouse);
+}
+
+static void process_packet_motion_v4(struct psmouse *psmouse)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct elantech_data *etd = psmouse->private;
+	unsigned char *packet = psmouse->packet;
+	int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0;
+	int id, sid;
+
+	id = ((packet[0] & 0xe0) >> 5) - 1;
+	if (id < 0)
+		return;
+
+	sid = ((packet[3] & 0xe0) >> 5) - 1;
+	weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1;
+	/*
+	 * Motion packets give us the delta of x, y values of specific fingers,
+	 * but in two's complement. Let the compiler do the conversion for us.
+	 * Also _enlarge_ the numbers to int, in case of overflow.
+	 */
+	delta_x1 = (signed char)packet[1];
+	delta_y1 = (signed char)packet[2];
+	delta_x2 = (signed char)packet[4];
+	delta_y2 = (signed char)packet[5];
+
+	etd->mt[id].x += delta_x1 * weight;
+	etd->mt[id].y -= delta_y1 * weight;
+	input_mt_slot(dev, id);
+	input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
+	input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
+
+	if (sid >= 0) {
+		etd->mt[sid].x += delta_x2 * weight;
+		etd->mt[sid].y -= delta_y2 * weight;
+		input_mt_slot(dev, sid);
+		input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x);
+		input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y);
+	}
+
+	elantech_input_sync_v4(psmouse);
+}
+
+static void elantech_report_absolute_v4(struct psmouse *psmouse,
+					int packet_type)
+{
+	switch (packet_type) {
+	case PACKET_V4_STATUS:
+		process_packet_status_v4(psmouse);
+		break;
+
+	case PACKET_V4_HEAD:
+		process_packet_head_v4(psmouse);
+		break;
+
+	case PACKET_V4_MOTION:
+		process_packet_motion_v4(psmouse);
+		break;
+
+	case PACKET_UNKNOWN:
+	default:
+		/* impossible to get here */
+		break;
+	}
+}
+
+static int elantech_packet_check_v1(struct psmouse *psmouse)
 {
 	struct elantech_data *etd = psmouse->private;
 	unsigned char *packet = psmouse->packet;
@@ -376,31 +609,142 @@ static int elantech_check_parity_v1(struct psmouse *psmouse)
 	       etd->parity[packet[3]] == p3;
 }
 
+static int elantech_debounce_check_v2(struct psmouse *psmouse)
+{
+        /*
+         * When we encounter packet that matches this exactly, it means the
+         * hardware is in debounce status. Just ignore the whole packet.
+         */
+        const u8 debounce_packet[] = { 0x84, 0xff, 0xff, 0x02, 0xff, 0xff };
+        unsigned char *packet = psmouse->packet;
+
+        return !memcmp(packet, debounce_packet, sizeof(debounce_packet));
+}
+
+static int elantech_packet_check_v2(struct psmouse *psmouse)
+{
+	struct elantech_data *etd = psmouse->private;
+	unsigned char *packet = psmouse->packet;
+
+	/*
+	 * V2 hardware has two flavors. Older ones that do not report pressure,
+	 * and newer ones that reports pressure and width. With newer ones, all
+	 * packets (1, 2, 3 finger touch) have the same constant bits. With
+	 * older ones, 1/3 finger touch packets and 2 finger touch packets
+	 * have different constant bits.
+	 * With all three cases, if the constant bits are not exactly what I
+	 * expected, I consider them invalid.
+	 */
+	if (etd->reports_pressure)
+		return (packet[0] & 0x0c) == 0x04 &&
+		       (packet[3] & 0x0f) == 0x02;
+
+	if ((packet[0] & 0xc0) == 0x80)
+		return (packet[0] & 0x0c) == 0x0c &&
+		       (packet[3] & 0x0e) == 0x08;
+
+	return (packet[0] & 0x3c) == 0x3c &&
+	       (packet[1] & 0xf0) == 0x00 &&
+	       (packet[3] & 0x3e) == 0x38 &&
+	       (packet[4] & 0xf0) == 0x00;
+}
+
+/*
+ * We check the constant bits to determine what packet type we get,
+ * so packet checking is mandatory for v3 and later hardware.
+ */
+static int elantech_packet_check_v3(struct psmouse *psmouse)
+{
+	const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff };
+	unsigned char *packet = psmouse->packet;
+
+	/*
+	 * check debounce first, it has the same signature in byte 0
+	 * and byte 3 as PACKET_V3_HEAD.
+	 */
+	if (!memcmp(packet, debounce_packet, sizeof(debounce_packet)))
+		return PACKET_DEBOUNCE;
+
+	if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02)
+		return PACKET_V3_HEAD;
+
+	if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c)
+		return PACKET_V3_TAIL;
+
+	return PACKET_UNKNOWN;
+}
+
+static int elantech_packet_check_v4(struct psmouse *psmouse)
+{
+	unsigned char *packet = psmouse->packet;
+
+	if ((packet[0] & 0x0c) == 0x04 &&
+	    (packet[3] & 0x1f) == 0x11)
+		return PACKET_V4_HEAD;
+
+	if ((packet[0] & 0x0c) == 0x04 &&
+	    (packet[3] & 0x1f) == 0x12)
+		return PACKET_V4_MOTION;
+
+	if ((packet[0] & 0x0c) == 0x04 &&
+	    (packet[3] & 0x1f) == 0x10)
+		return PACKET_V4_STATUS;
+
+	return PACKET_UNKNOWN;
+}
+
 /*
  * Process byte stream from mouse and handle complete packets
  */
 static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
 {
 	struct elantech_data *etd = psmouse->private;
+	int packet_type;
 
 	if (psmouse->pktcnt < psmouse->pktsize)
 		return PSMOUSE_GOOD_DATA;
 
 	if (etd->debug > 1)
-		elantech_packet_dump(psmouse->packet, psmouse->pktsize);
+		elantech_packet_dump(psmouse);
 
 	switch (etd->hw_version) {
 	case 1:
-		if (etd->paritycheck && !elantech_check_parity_v1(psmouse))
+		if (etd->paritycheck && !elantech_packet_check_v1(psmouse))
 			return PSMOUSE_BAD_DATA;
 
 		elantech_report_absolute_v1(psmouse);
 		break;
 
 	case 2:
-		/* We don't know how to check parity in protocol v2 */
+		/* ignore debounce */
+		if (elantech_debounce_check_v2(psmouse))
+			return PSMOUSE_FULL_PACKET;
+
+		if (etd->paritycheck && !elantech_packet_check_v2(psmouse))
+			return PSMOUSE_BAD_DATA;
+
 		elantech_report_absolute_v2(psmouse);
 		break;
+
+	case 3:
+		packet_type = elantech_packet_check_v3(psmouse);
+		/* ignore debounce */
+		if (packet_type == PACKET_DEBOUNCE)
+			return PSMOUSE_FULL_PACKET;
+
+		if (packet_type == PACKET_UNKNOWN)
+			return PSMOUSE_BAD_DATA;
+
+		elantech_report_absolute_v3(psmouse, packet_type);
+		break;
+
+	case 4:
+		packet_type = elantech_packet_check_v4(psmouse);
+		if (packet_type == PACKET_UNKNOWN)
+			return PSMOUSE_BAD_DATA;
+
+		elantech_report_absolute_v4(psmouse, packet_type);
+		break;
 	}
 
 	return PSMOUSE_FULL_PACKET;
@@ -435,15 +779,29 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
 		    elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
 		    elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
 			rc = -1;
-			break;
 		}
+		break;
+
+	case 3:
+		etd->reg_10 = 0x0b;
+		if (elantech_write_reg(psmouse, 0x10, etd->reg_10))
+			rc = -1;
+
+		break;
+
+	case 4:
+		etd->reg_07 = 0x01;
+		if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
+			rc = -1;
+
+		goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */
 	}
 
 	if (rc == 0) {
 		/*
 		 * Read back reg 0x10. For hardware version 1 we must make
 		 * sure the absolute mode bit is set. For hardware version 2
-		 * the touchpad is probably initalising and not ready until
+		 * the touchpad is probably initializing and not ready until
 		 * we read back the value we just wrote.
 		 */
 		do {
@@ -456,27 +814,115 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
 		} while (tries > 0);
 
 		if (rc) {
-			pr_err("failed to read back register 0x10.\n");
+			psmouse_err(psmouse,
+				    "failed to read back register 0x10.\n");
 		} else if (etd->hw_version == 1 &&
 			   !(val & ETP_R10_ABSOLUTE_MODE)) {
-			pr_err("touchpad refuses to switch to absolute mode.\n");
+			psmouse_err(psmouse,
+				    "touchpad refuses to switch to absolute mode.\n");
 			rc = -1;
 		}
 	}
 
+ skip_readback_reg_10:
 	if (rc)
-		pr_err("failed to initialise registers.\n");
+		psmouse_err(psmouse, "failed to initialise registers.\n");
 
 	return rc;
 }
 
+static int elantech_set_range(struct psmouse *psmouse,
+			      unsigned int *x_min, unsigned int *y_min,
+			      unsigned int *x_max, unsigned int *y_max,
+			      unsigned int *width)
+{
+	struct elantech_data *etd = psmouse->private;
+	unsigned char param[3];
+	unsigned char traces;
+
+	switch (etd->hw_version) {
+	case 1:
+		*x_min = ETP_XMIN_V1;
+		*y_min = ETP_YMIN_V1;
+		*x_max = ETP_XMAX_V1;
+		*y_max = ETP_YMAX_V1;
+		break;
+
+	case 2:
+		if (etd->fw_version == 0x020800 ||
+		    etd->fw_version == 0x020b00 ||
+		    etd->fw_version == 0x020030) {
+			*x_min = ETP_XMIN_V2;
+			*y_min = ETP_YMIN_V2;
+			*x_max = ETP_XMAX_V2;
+			*y_max = ETP_YMAX_V2;
+		} else {
+			int i;
+			int fixed_dpi;
+
+			i = (etd->fw_version > 0x020800 &&
+			     etd->fw_version < 0x020900) ? 1 : 2;
+
+			if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param))
+				return -1;
+
+			fixed_dpi = param[1] & 0x10;
+
+			if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) {
+				if (synaptics_send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
+					return -1;
+
+				*x_max = (etd->capabilities[1] - i) * param[1] / 2;
+				*y_max = (etd->capabilities[2] - i) * param[2] / 2;
+			} else if (etd->fw_version == 0x040216) {
+				*x_max = 819;
+				*y_max = 405;
+			} else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) {
+				*x_max = 900;
+				*y_max = 500;
+			} else {
+				*x_max = (etd->capabilities[1] - i) * 64;
+				*y_max = (etd->capabilities[2] - i) * 64;
+			}
+		}
+		break;
+
+	case 3:
+		if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param))
+			return -1;
+
+		*x_max = (0x0f & param[0]) << 8 | param[1];
+		*y_max = (0xf0 & param[0]) << 4 | param[2];
+		break;
+
+	case 4:
+		if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param))
+			return -1;
+
+		*x_max = (0x0f & param[0]) << 8 | param[1];
+		*y_max = (0xf0 & param[0]) << 4 | param[2];
+		traces = etd->capabilities[1];
+		if ((traces < 2) || (traces > *x_max))
+			return -1;
+
+		*width = *x_max / (traces - 1);
+		break;
+	}
+
+	return 0;
+}
+
 /*
  * Set the appropriate event bits for the input subsystem
  */
-static void elantech_set_input_params(struct psmouse *psmouse)
+static int elantech_set_input_params(struct psmouse *psmouse)
 {
 	struct input_dev *dev = psmouse->dev;
 	struct elantech_data *etd = psmouse->private;
+	unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0;
+
+	if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
+		return -1;
 
 	__set_bit(EV_KEY, dev->evbit);
 	__set_bit(EV_ABS, dev->evbit);
@@ -494,30 +940,64 @@ static void elantech_set_input_params(struct psmouse *psmouse)
 	case 1:
 		/* Rocker button */
 		if (etd->fw_version < 0x020000 &&
-		    (etd->capabilities & ETP_CAP_HAS_ROCKER)) {
+		    (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
 			__set_bit(BTN_FORWARD, dev->keybit);
 			__set_bit(BTN_BACK, dev->keybit);
 		}
-		input_set_abs_params(dev, ABS_X, ETP_XMIN_V1, ETP_XMAX_V1, 0, 0);
-		input_set_abs_params(dev, ABS_Y, ETP_YMIN_V1, ETP_YMAX_V1, 0, 0);
+		input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
+		input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
 		break;
 
 	case 2:
 		__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
-		input_set_abs_params(dev, ABS_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0);
-		input_set_abs_params(dev, ABS_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0);
+		__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
+		/* fall through */
+	case 3:
+		input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
+		input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
 		if (etd->reports_pressure) {
 			input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
 					     ETP_PMAX_V2, 0, 0);
 			input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
 					     ETP_WMAX_V2, 0, 0);
 		}
-		__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
 		input_mt_init_slots(dev, 2);
-		input_set_abs_params(dev, ABS_MT_POSITION_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0);
-		input_set_abs_params(dev, ABS_MT_POSITION_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0);
+		input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
+		input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
+		break;
+
+	case 4:
+		__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
+		/* For X to recognize me as touchpad. */
+		input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
+		input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
+		/*
+		 * range of pressure and width is the same as v2,
+		 * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility.
+		 */
+		input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
+				     ETP_PMAX_V2, 0, 0);
+		input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
+				     ETP_WMAX_V2, 0, 0);
+		/* Multitouch capable pad, up to 5 fingers. */
+		input_mt_init_slots(dev, ETP_MAX_FINGERS);
+		input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
+		input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
+		input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2,
+				     ETP_PMAX_V2, 0, 0);
+		/*
+		 * The firmware reports how many trace lines the finger spans,
+		 * convert to surface unit as Protocol-B requires.
+		 */
+		input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0,
+				     ETP_WMAX_V2 * width, 0, 0);
 		break;
 	}
+
+	etd->y_max = y_max;
+	etd->width = width;
+
+	return 0;
 }
 
 struct elantech_attr_data {
@@ -587,6 +1067,7 @@ static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
 			    elantech_show_int_attr,			\
 			    elantech_set_int_attr)
 
+ELANTECH_INT_ATTR(reg_07, 0x07);
 ELANTECH_INT_ATTR(reg_10, 0x10);
 ELANTECH_INT_ATTR(reg_11, 0x11);
 ELANTECH_INT_ATTR(reg_20, 0x20);
@@ -600,6 +1081,7 @@ ELANTECH_INT_ATTR(debug, 0);
 ELANTECH_INT_ATTR(paritycheck, 0);
 
 static struct attribute *elantech_attrs[] = {
+	&psmouse_attr_reg_07.dattr.attr,
 	&psmouse_attr_reg_10.dattr.attr,
 	&psmouse_attr_reg_11.dattr.attr,
 	&psmouse_attr_reg_20.dattr.attr,
@@ -651,7 +1133,7 @@ int elantech_detect(struct psmouse *psmouse, bool set_properties)
 	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 	    ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
-		pr_debug("sending Elantech magic knock failed.\n");
+		psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n");
 		return -1;
 	}
 
@@ -659,9 +1141,11 @@ int elantech_detect(struct psmouse *psmouse, bool set_properties)
 	 * Report this in case there are Elantech models that use a different
 	 * set of magic numbers
 	 */
-	if (param[0] != 0x3c || param[1] != 0x03 || param[2] != 0xc8) {
-		pr_debug("unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
-			 param[0], param[1], param[2]);
+	if (param[0] != 0x3c || param[1] != 0x03 ||
+	    (param[2] != 0xc8 && param[2] != 0x00)) {
+		psmouse_dbg(psmouse,
+			    "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
+			    param[0], param[1], param[2]);
 		return -1;
 	}
 
@@ -671,20 +1155,18 @@ int elantech_detect(struct psmouse *psmouse, bool set_properties)
 	 * to Elantech magic knock and there might be more.
 	 */
 	if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
-		pr_debug("failed to query firmware version.\n");
+		psmouse_dbg(psmouse, "failed to query firmware version.\n");
 		return -1;
 	}
 
-	pr_debug("Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
-		 param[0], param[1], param[2]);
+	psmouse_dbg(psmouse,
+		    "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
+		    param[0], param[1], param[2]);
 
 	if (!elantech_is_signature_valid(param)) {
-		if (!force_elantech) {
-			pr_debug("Probably not a real Elantech touchpad. Aborting.\n");
-			return -1;
-		}
-
-		pr_debug("Probably not a real Elantech touchpad. Enabling anyway due to force_elantech.\n");
+		psmouse_dbg(psmouse,
+			    "Probably not a real Elantech touchpad. Aborting.\n");
+		return -1;
 	}
 
 	if (set_properties) {
@@ -715,7 +1197,8 @@ static int elantech_reconnect(struct psmouse *psmouse)
 		return -1;
 
 	if (elantech_set_absolute_mode(psmouse)) {
-		pr_err("failed to put touchpad back into absolute mode.\n");
+		psmouse_err(psmouse,
+			    "failed to put touchpad back into absolute mode.\n");
 		return -1;
 	}
 
@@ -723,6 +1206,48 @@ static int elantech_reconnect(struct psmouse *psmouse)
 }
 
 /*
+ * determine hardware version and set some properties according to it.
+ */
+static int elantech_set_properties(struct elantech_data *etd)
+{
+	int ver = (etd->fw_version & 0x0f0000) >> 16;
+
+	if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
+		etd->hw_version = 1;
+	else if (etd->fw_version < 0x150600)
+		etd->hw_version = 2;
+	else if (ver == 5)
+		etd->hw_version = 3;
+	else if (ver == 6)
+		etd->hw_version = 4;
+	else
+		return -1;
+
+	/*
+	 * Turn on packet checking by default.
+	 */
+	etd->paritycheck = 1;
+
+	/*
+	 * This firmware suffers from misreporting coordinates when
+	 * a touch action starts causing the mouse cursor or scrolled page
+	 * to jump. Enable a workaround.
+	 */
+	etd->jumpy_cursor =
+		(etd->fw_version == 0x020022 || etd->fw_version == 0x020600);
+
+	if (etd->hw_version > 1) {
+		/* For now show extra debug information */
+		etd->debug = 1;
+
+		if (etd->fw_version >= 0x020800)
+			etd->reports_pressure = true;
+	}
+
+	return 0;
+}
+
+/*
  * Initialize the touchpad and create sysfs entries
  */
 int elantech_init(struct psmouse *psmouse)
@@ -743,70 +1268,53 @@ int elantech_init(struct psmouse *psmouse)
 	 * Do the version query again so we can store the result
 	 */
 	if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
-		pr_err("failed to query firmware version.\n");
+		psmouse_err(psmouse, "failed to query firmware version.\n");
 		goto init_fail;
 	}
-
 	etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2];
 
-	/*
-	 * Assume every version greater than this is new EeePC style
-	 * hardware with 6 byte packets
-	 */
-	if (etd->fw_version >= 0x020030) {
-		etd->hw_version = 2;
-		/* For now show extra debug information */
-		etd->debug = 1;
-		/* Don't know how to do parity checking for version 2 */
-		etd->paritycheck = 0;
-
-		if (etd->fw_version >= 0x020800)
-			etd->reports_pressure = true;
-
-	} else {
-		etd->hw_version = 1;
-		etd->paritycheck = 1;
-	}
-
-	pr_info("assuming hardware version %d, firmware version %d.%d.%d\n",
-		etd->hw_version, param[0], param[1], param[2]);
-
-	if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY, param)) {
-		pr_err("failed to query capabilities.\n");
+	if (elantech_set_properties(etd)) {
+		psmouse_err(psmouse, "unknown hardware version, aborting...\n");
 		goto init_fail;
 	}
-	pr_info("Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
-		param[0], param[1], param[2]);
-	etd->capabilities = param[0];
+	psmouse_info(psmouse,
+		     "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n",
+		     etd->hw_version, param[0], param[1], param[2]);
 
-	/*
-	 * This firmware suffers from misreporting coordinates when
-	 * a touch action starts causing the mouse cursor or scrolled page
-	 * to jump. Enable a workaround.
-	 */
-	if (etd->fw_version == 0x020022 || etd->fw_version == 0x020600) {
-		pr_info("firmware version 2.0.34/2.6.0 detected, enabling jumpy cursor workaround\n");
-		etd->jumpy_cursor = true;
+	if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
+	    etd->capabilities)) {
+		psmouse_err(psmouse, "failed to query capabilities.\n");
+		goto init_fail;
 	}
+	psmouse_info(psmouse,
+		     "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
+		     etd->capabilities[0], etd->capabilities[1],
+		     etd->capabilities[2]);
 
 	if (elantech_set_absolute_mode(psmouse)) {
-		pr_err("failed to put touchpad into absolute mode.\n");
+		psmouse_err(psmouse,
+			    "failed to put touchpad into absolute mode.\n");
 		goto init_fail;
 	}
 
-	elantech_set_input_params(psmouse);
+	if (elantech_set_input_params(psmouse)) {
+		psmouse_err(psmouse, "failed to query touchpad range.\n");
+		goto init_fail;
+	}
 
 	error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
 				   &elantech_attr_group);
 	if (error) {
-		pr_err("failed to create sysfs attributes, error: %d.\n", error);
+		psmouse_err(psmouse,
+			    "failed to create sysfs attributes, error: %d.\n",
+			    error);
 		goto init_fail;
 	}
 
 	psmouse->protocol_handler = elantech_process_byte;
 	psmouse->disconnect = elantech_disconnect;
 	psmouse->reconnect = elantech_reconnect;
-	psmouse->pktsize = etd->hw_version == 2 ? 6 : 4;
+	psmouse->pktsize = etd->hw_version > 1 ? 6 : 4;
 
 	return 0;
 
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index fabb2b99615c..9e5f1aabea7e 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -16,14 +16,17 @@
 /*
  * Command values for Synaptics style queries
  */
+#define ETP_FW_ID_QUERY			0x00
 #define ETP_FW_VERSION_QUERY		0x01
 #define ETP_CAPABILITIES_QUERY		0x02
+#define ETP_SAMPLE_QUERY		0x03
 
 /*
  * Command values for register reading or writing
  */
 #define ETP_REGISTER_READ		0x10
 #define ETP_REGISTER_WRITE		0x11
+#define ETP_REGISTER_READWRITE		0x00
 
 /*
  * Hardware version 2 custom PS/2 command value
@@ -66,16 +69,13 @@
 #define ETP_YMAX_V1			(384 - ETP_EDGE_FUZZ_V1)
 
 /*
- * It seems the resolution for hardware version 2 doubled.
- * Hence the X and Y ranges are doubled too.
- * The bezel around the pad also appears to be smaller
+ * The resolution for older v2 hardware doubled.
+ * (newer v2's firmware provides command so we can query)
  */
-#define ETP_EDGE_FUZZ_V2		8
-
-#define ETP_XMIN_V2			(   0 + ETP_EDGE_FUZZ_V2)
-#define ETP_XMAX_V2			(1152 - ETP_EDGE_FUZZ_V2)
-#define ETP_YMIN_V2			(   0 + ETP_EDGE_FUZZ_V2)
-#define ETP_YMAX_V2			( 768 - ETP_EDGE_FUZZ_V2)
+#define ETP_XMIN_V2			0
+#define ETP_XMAX_V2			1152
+#define ETP_YMIN_V2			0
+#define ETP_YMAX_V2			768
 
 #define ETP_PMIN_V2			0
 #define ETP_PMAX_V2			255
@@ -83,17 +83,37 @@
 #define ETP_WMAX_V2			15
 
 /*
- * For two finger touches the coordinate of each finger gets reported
- * separately but with reduced resolution.
+ * v3 hardware has 2 kinds of packet types,
+ * v4 hardware has 3.
+ */
+#define PACKET_UNKNOWN			0x01
+#define PACKET_DEBOUNCE			0x02
+#define PACKET_V3_HEAD			0x03
+#define PACKET_V3_TAIL			0x04
+#define PACKET_V4_HEAD			0x05
+#define PACKET_V4_MOTION		0x06
+#define PACKET_V4_STATUS		0x07
+
+/*
+ * track up to 5 fingers for v4 hardware
+ */
+#define ETP_MAX_FINGERS			5
+
+/*
+ * weight value for v4 hardware
  */
-#define ETP_2FT_FUZZ			4
+#define ETP_WEIGHT_VALUE		5
 
-#define ETP_2FT_XMIN			(  0 + ETP_2FT_FUZZ)
-#define ETP_2FT_XMAX			(288 - ETP_2FT_FUZZ)
-#define ETP_2FT_YMIN			(  0 + ETP_2FT_FUZZ)
-#define ETP_2FT_YMAX			(192 - ETP_2FT_FUZZ)
+/*
+ * The base position for one finger, v4 hardware
+ */
+struct finger_pos {
+	unsigned int x;
+	unsigned int y;
+};
 
 struct elantech_data {
+	unsigned char reg_07;
 	unsigned char reg_10;
 	unsigned char reg_11;
 	unsigned char reg_20;
@@ -104,13 +124,16 @@ struct elantech_data {
 	unsigned char reg_25;
 	unsigned char reg_26;
 	unsigned char debug;
-	unsigned char capabilities;
+	unsigned char capabilities[3];
 	bool paritycheck;
 	bool jumpy_cursor;
 	bool reports_pressure;
 	unsigned char hw_version;
 	unsigned int fw_version;
 	unsigned int single_finger_reports;
+	unsigned int y_max;
+	unsigned int width;
+	struct finger_pos mt[ETP_MAX_FINGERS];
 	unsigned char parity[256];
 };
 
diff --git a/drivers/input/mouse/hgpk.c b/drivers/input/mouse/hgpk.c
index 4d17d9f3320b..0470dd46b566 100644
--- a/drivers/input/mouse/hgpk.c
+++ b/drivers/input/mouse/hgpk.c
@@ -136,10 +136,10 @@ static int hgpk_discard_decay_hack(struct psmouse *psmouse, int x, int y)
 	/* discard if too big, or half that but > 4 times the prev delta */
 	if (avx > recalib_delta ||
 		(avx > recalib_delta / 2 && ((avx / 4) > priv->xlast))) {
-		hgpk_err(psmouse, "detected %dpx jump in x\n", x);
+		psmouse_warn(psmouse, "detected %dpx jump in x\n", x);
 		priv->xbigj = avx;
 	} else if (approx_half(avx, priv->xbigj)) {
-		hgpk_err(psmouse, "detected secondary %dpx jump in x\n", x);
+		psmouse_warn(psmouse, "detected secondary %dpx jump in x\n", x);
 		priv->xbigj = avx;
 		priv->xsaw_secondary++;
 	} else {
@@ -151,10 +151,10 @@ static int hgpk_discard_decay_hack(struct psmouse *psmouse, int x, int y)
 
 	if (avy > recalib_delta ||
 		(avy > recalib_delta / 2 && ((avy / 4) > priv->ylast))) {
-		hgpk_err(psmouse, "detected %dpx jump in y\n", y);
+		psmouse_warn(psmouse, "detected %dpx jump in y\n", y);
 		priv->ybigj = avy;
 	} else if (approx_half(avy, priv->ybigj)) {
-		hgpk_err(psmouse, "detected secondary %dpx jump in y\n", y);
+		psmouse_warn(psmouse, "detected secondary %dpx jump in y\n", y);
 		priv->ybigj = avy;
 		priv->ysaw_secondary++;
 	} else {
@@ -168,7 +168,7 @@ static int hgpk_discard_decay_hack(struct psmouse *psmouse, int x, int y)
 	priv->ylast = avy;
 
 	if (do_recal && jumpy_delay) {
-		hgpk_err(psmouse, "scheduling recalibration\n");
+		psmouse_warn(psmouse, "scheduling recalibration\n");
 		psmouse_queue_work(psmouse, &priv->recalib_wq,
 				msecs_to_jiffies(jumpy_delay));
 	}
@@ -260,8 +260,8 @@ static void hgpk_spewing_hack(struct psmouse *psmouse,
 		 * movement, it is probably a case of the user moving the
 		 * cursor very slowly across the screen. */
 		if (abs(priv->x_tally) < 3 && abs(priv->y_tally) < 3) {
-			hgpk_err(psmouse, "packet spew detected (%d,%d)\n",
-				 priv->x_tally, priv->y_tally);
+			psmouse_warn(psmouse, "packet spew detected (%d,%d)\n",
+				     priv->x_tally, priv->y_tally);
 			priv->spew_flag = RECALIBRATING;
 			psmouse_queue_work(psmouse, &priv->recalib_wq,
 					   msecs_to_jiffies(spew_delay));
@@ -333,12 +333,12 @@ static bool hgpk_is_byte_valid(struct psmouse *psmouse, unsigned char *packet)
 	}
 
 	if (!valid)
-		hgpk_dbg(psmouse,
-			 "bad data, mode %d (%d) %02x %02x %02x %02x %02x %02x\n",
-			 priv->mode, pktcnt,
-			 psmouse->packet[0], psmouse->packet[1],
-			 psmouse->packet[2], psmouse->packet[3],
-			 psmouse->packet[4], psmouse->packet[5]);
+		psmouse_dbg(psmouse,
+			    "bad data, mode %d (%d) %02x %02x %02x %02x %02x %02x\n",
+			    priv->mode, pktcnt,
+			    psmouse->packet[0], psmouse->packet[1],
+			    psmouse->packet[2], psmouse->packet[3],
+			    psmouse->packet[4], psmouse->packet[5]);
 
 	return valid;
 }
@@ -361,19 +361,20 @@ static void hgpk_process_advanced_packet(struct psmouse *psmouse)
 
 		input_report_abs(idev, ABS_PRESSURE, z);
 		if (tpdebug)
-			hgpk_dbg(psmouse, "pd=%d fd=%d z=%d",
-				 pt_down, finger_down, z);
+			psmouse_dbg(psmouse, "pd=%d fd=%d z=%d",
+				    pt_down, finger_down, z);
 	} else {
 		/*
 		 * PenTablet mode does not report pressure, so we don't
 		 * report it here
 		 */
 		if (tpdebug)
-			hgpk_dbg(psmouse, "pd=%d ", down);
+			psmouse_dbg(psmouse, "pd=%d ", down);
 	}
 
 	if (tpdebug)
-		hgpk_dbg(psmouse, "l=%d r=%d x=%d y=%d\n", left, right, x, y);
+		psmouse_dbg(psmouse, "l=%d r=%d x=%d y=%d\n",
+			    left, right, x, y);
 
 	input_report_key(idev, BTN_TOUCH, down);
 	input_report_key(idev, BTN_LEFT, left);
@@ -395,7 +396,7 @@ static void hgpk_process_advanced_packet(struct psmouse *psmouse)
 	if (x == priv->abs_x && y == priv->abs_y) {
 		if (++priv->dupe_count > SPEW_WATCH_COUNT) {
 			if (tpdebug)
-				hgpk_dbg(psmouse, "hard spew detected\n");
+				psmouse_dbg(psmouse, "hard spew detected\n");
 			priv->spew_flag = RECALIBRATING;
 			psmouse_queue_work(psmouse, &priv->recalib_wq,
 					   msecs_to_jiffies(spew_delay));
@@ -412,7 +413,7 @@ static void hgpk_process_advanced_packet(struct psmouse *psmouse)
 		int y_diff = priv->abs_y - y;
 		if (hgpk_discard_decay_hack(psmouse, x_diff, y_diff)) {
 			if (tpdebug)
-				hgpk_dbg(psmouse, "discarding\n");
+				psmouse_dbg(psmouse, "discarding\n");
 			goto done;
 		}
 		hgpk_spewing_hack(psmouse, left, right, x_diff, y_diff);
@@ -437,20 +438,21 @@ static void hgpk_process_simple_packet(struct psmouse *psmouse)
 	int y = ((packet[0] << 3) & 0x100) - packet[2];
 
 	if (packet[0] & 0xc0)
-		hgpk_dbg(psmouse,
-			 "overflow -- 0x%02x 0x%02x 0x%02x\n",
-			 packet[0], packet[1], packet[2]);
+		psmouse_dbg(psmouse,
+			    "overflow -- 0x%02x 0x%02x 0x%02x\n",
+			    packet[0], packet[1], packet[2]);
 
 	if (hgpk_discard_decay_hack(psmouse, x, y)) {
 		if (tpdebug)
-			hgpk_dbg(psmouse, "discarding\n");
+			psmouse_dbg(psmouse, "discarding\n");
 		return;
 	}
 
 	hgpk_spewing_hack(psmouse, left, right, x, y);
 
 	if (tpdebug)
-		hgpk_dbg(psmouse, "l=%d r=%d x=%d y=%d\n", left, right, x, y);
+		psmouse_dbg(psmouse, "l=%d r=%d x=%d y=%d\n",
+			    left, right, x, y);
 
 	input_report_key(dev, BTN_LEFT, left);
 	input_report_key(dev, BTN_RIGHT, right);
@@ -482,9 +484,8 @@ static psmouse_ret_t hgpk_process_byte(struct psmouse *psmouse)
 			 * ugh, got a packet inside our recalibration
 			 * window, schedule another recalibration.
 			 */
-			hgpk_dbg(psmouse,
-				 "packet inside calibration window, "
-				 "queueing another recalibration\n");
+			psmouse_dbg(psmouse,
+				    "packet inside calibration window, queueing another recalibration\n");
 			psmouse_queue_work(psmouse, &priv->recalib_wq,
 					msecs_to_jiffies(post_interrupt_delay));
 		}
@@ -628,7 +629,7 @@ static int hgpk_reset_device(struct psmouse *psmouse, bool recalibrate)
 
 	err = hgpk_select_mode(psmouse);
 	if (err) {
-		hgpk_err(psmouse, "failed to select mode\n");
+		psmouse_err(psmouse, "failed to select mode\n");
 		return err;
 	}
 
@@ -648,11 +649,11 @@ static int hgpk_force_recalibrate(struct psmouse *psmouse)
 		return 0;
 
 	if (!autorecal) {
-		hgpk_dbg(psmouse, "recalibrations disabled, ignoring\n");
+		psmouse_dbg(psmouse, "recalibration disabled, ignoring\n");
 		return 0;
 	}
 
-	hgpk_dbg(psmouse, "recalibrating touchpad..\n");
+	psmouse_dbg(psmouse, "recalibrating touchpad..\n");
 
 	/* we don't want to race with the irq handler, nor with resyncs */
 	psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
@@ -675,7 +676,7 @@ static int hgpk_force_recalibrate(struct psmouse *psmouse)
 	psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 
 	if (tpdebug)
-		hgpk_dbg(psmouse, "touchpad reactivated\n");
+		psmouse_dbg(psmouse, "touchpad reactivated\n");
 
 	/*
 	 * If we get packets right away after recalibrating, it's likely
@@ -727,16 +728,16 @@ static int hgpk_toggle_powersave(struct psmouse *psmouse, int enable)
 
 		err = hgpk_reset_device(psmouse, false);
 		if (err) {
-			hgpk_err(psmouse, "Failed to reset device!\n");
+			psmouse_err(psmouse, "Failed to reset device!\n");
 			return err;
 		}
 
 		/* should be all set, enable the touchpad */
 		ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
 		psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
-		hgpk_dbg(psmouse, "Touchpad powered up.\n");
+		psmouse_dbg(psmouse, "Touchpad powered up.\n");
 	} else {
-		hgpk_dbg(psmouse, "Powering off touchpad.\n");
+		psmouse_dbg(psmouse, "Powering off touchpad.\n");
 
 		if (ps2_command(ps2dev, NULL, 0xec) ||
 		    ps2_command(ps2dev, NULL, 0xec) ||
@@ -923,7 +924,7 @@ static void hgpk_recalib_work(struct work_struct *work)
 	struct psmouse *psmouse = priv->psmouse;
 
 	if (hgpk_force_recalibrate(psmouse))
-		hgpk_err(psmouse, "recalibration failed!\n");
+		psmouse_err(psmouse, "recalibration failed!\n");
 }
 
 static int hgpk_register(struct psmouse *psmouse)
@@ -947,14 +948,15 @@ static int hgpk_register(struct psmouse *psmouse)
 	err = device_create_file(&psmouse->ps2dev.serio->dev,
 				 &psmouse_attr_powered.dattr);
 	if (err) {
-		hgpk_err(psmouse, "Failed creating 'powered' sysfs node\n");
+		psmouse_err(psmouse, "Failed creating 'powered' sysfs node\n");
 		return err;
 	}
 
 	err = device_create_file(&psmouse->ps2dev.serio->dev,
 				 &psmouse_attr_hgpk_mode.dattr);
 	if (err) {
-		hgpk_err(psmouse, "Failed creating 'hgpk_mode' sysfs node\n");
+		psmouse_err(psmouse,
+			    "Failed creating 'hgpk_mode' sysfs node\n");
 		goto err_remove_powered;
 	}
 
@@ -963,8 +965,8 @@ static int hgpk_register(struct psmouse *psmouse)
 		err = device_create_file(&psmouse->ps2dev.serio->dev,
 					 &psmouse_attr_recalibrate.dattr);
 		if (err) {
-			hgpk_err(psmouse,
-				"Failed creating 'recalibrate' sysfs node\n");
+			psmouse_err(psmouse,
+				    "Failed creating 'recalibrate' sysfs node\n");
 			goto err_remove_mode;
 		}
 	}
@@ -1027,13 +1029,13 @@ static enum hgpk_model_t hgpk_get_model(struct psmouse *psmouse)
 		return -EIO;
 	}
 
-	hgpk_dbg(psmouse, "ID: %02x %02x %02x\n", param[0], param[1], param[2]);
+	psmouse_dbg(psmouse, "ID: %02x %02x %02x\n", param[0], param[1], param[2]);
 
 	/* HGPK signature: 0x67, 0x00, 0x<model> */
 	if (param[0] != 0x67 || param[1] != 0x00)
 		return -ENODEV;
 
-	hgpk_info(psmouse, "OLPC touchpad revision 0x%x\n", param[2]);
+	psmouse_info(psmouse, "OLPC touchpad revision 0x%x\n", param[2]);
 
 	return param[2];
 }
diff --git a/drivers/input/mouse/hgpk.h b/drivers/input/mouse/hgpk.h
index 311c0e87fcbf..dd686771cfe0 100644
--- a/drivers/input/mouse/hgpk.h
+++ b/drivers/input/mouse/hgpk.h
@@ -46,17 +46,6 @@ struct hgpk_data {
 	int xsaw_secondary, ysaw_secondary; /* jumpiness detection */
 };
 
-#define hgpk_dbg(psmouse, format, arg...)		\
-	dev_dbg(&(psmouse)->ps2dev.serio->dev, format, ## arg)
-#define hgpk_err(psmouse, format, arg...)		\
-	dev_err(&(psmouse)->ps2dev.serio->dev, format, ## arg)
-#define hgpk_info(psmouse, format, arg...)		\
-	dev_info(&(psmouse)->ps2dev.serio->dev, format, ## arg)
-#define hgpk_warn(psmouse, format, arg...)		\
-	dev_warn(&(psmouse)->ps2dev.serio->dev, format, ## arg)
-#define hgpk_notice(psmouse, format, arg...)		\
-	dev_notice(&(psmouse)->ps2dev.serio->dev, format, ## arg)
-
 #ifdef CONFIG_MOUSE_PS2_OLPC
 void hgpk_module_init(void);
 int hgpk_detect(struct psmouse *psmouse, bool set_properties);
diff --git a/drivers/input/mouse/lifebook.c b/drivers/input/mouse/lifebook.c
index 83bcaba96b89..2c4db636de6c 100644
--- a/drivers/input/mouse/lifebook.c
+++ b/drivers/input/mouse/lifebook.c
@@ -169,8 +169,8 @@ static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse)
 
 	if (relative_packet) {
 		if (!dev2)
-			printk(KERN_WARNING "lifebook.c: got relative packet "
-				"but no relative device set up\n");
+			psmouse_warn(psmouse,
+				     "got relative packet but no relative device set up\n");
 	} else {
 		if (lifebook_use_6byte_proto) {
 			input_report_abs(dev1, ABS_X,
@@ -212,7 +212,7 @@ static int lifebook_absolute_mode(struct psmouse *psmouse)
 
 	/*
 	 * Enable absolute output -- ps2_command fails always but if
-	 * you leave this call out the touchsreen will never send
+	 * you leave this call out the touchscreen will never send
 	 * absolute coordinates
 	 */
 	param = lifebook_use_6byte_proto ? 0x08 : 0x07;
diff --git a/drivers/input/mouse/logips2pp.c b/drivers/input/mouse/logips2pp.c
index c9983aee9082..faac2c3bef74 100644
--- a/drivers/input/mouse/logips2pp.c
+++ b/drivers/input/mouse/logips2pp.c
@@ -82,11 +82,11 @@ static psmouse_ret_t ps2pp_process_byte(struct psmouse *psmouse)
 			packet[0] = packet[2] | 0x08;
 			break;
 
-#ifdef DEBUG
 		default:
-			printk(KERN_WARNING "psmouse.c: Received PS2++ packet #%x, but don't know how to handle.\n",
-				(packet[1] >> 4) | (packet[0] & 0x30));
-#endif
+			psmouse_dbg(psmouse,
+				    "Received PS2++ packet #%x, but don't know how to handle.\n",
+				    (packet[1] >> 4) | (packet[0] & 0x30));
+			break;
 		}
 	} else {
 		/* Standard PS/2 motion data */
@@ -382,7 +382,7 @@ int ps2pp_init(struct psmouse *psmouse, bool set_properties)
 		}
 
 	} else {
-		printk(KERN_WARNING "logips2pp: Detected unknown logitech mouse model %d\n", model);
+		psmouse_warn(psmouse, "Detected unknown Logitech mouse model %d\n", model);
 	}
 
 	if (set_properties) {
@@ -400,9 +400,9 @@ int ps2pp_init(struct psmouse *psmouse, bool set_properties)
 				error = device_create_file(&psmouse->ps2dev.serio->dev,
 							   &psmouse_attr_smartscroll.dattr);
 				if (error) {
-					printk(KERN_ERR
-						"logips2pp.c: failed to create smartscroll "
-						"sysfs attribute, error: %d\n", error);
+					psmouse_err(psmouse,
+						    "failed to create smartscroll sysfs attribute, error: %d\n",
+						    error);
 					return -1;
 				}
 			}
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 3f74baee102b..9f352fbd7b4f 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -11,6 +11,9 @@
  * the Free Software Foundation.
  */
 
+#define pr_fmt(fmt)		KBUILD_MODNAME ": " fmt
+#define psmouse_fmt(fmt)	fmt
+
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -251,11 +254,14 @@ static int psmouse_handle_byte(struct psmouse *psmouse)
 	switch (rc) {
 	case PSMOUSE_BAD_DATA:
 		if (psmouse->state == PSMOUSE_ACTIVATED) {
-			printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
-				psmouse->name, psmouse->phys, psmouse->pktcnt);
+			psmouse_warn(psmouse,
+				     "%s at %s lost sync at byte %d\n",
+				     psmouse->name, psmouse->phys,
+				     psmouse->pktcnt);
 			if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
 				__psmouse_set_state(psmouse, PSMOUSE_IGNORE);
-				printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
+				psmouse_notice(psmouse,
+						"issuing reconnect request\n");
 				serio_reconnect(psmouse->ps2dev.serio);
 				return -1;
 			}
@@ -267,8 +273,9 @@ static int psmouse_handle_byte(struct psmouse *psmouse)
 		psmouse->pktcnt = 0;
 		if (psmouse->out_of_sync_cnt) {
 			psmouse->out_of_sync_cnt = 0;
-			printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
-				psmouse->name, psmouse->phys);
+			psmouse_notice(psmouse,
+					"%s at %s - driver resynced.\n",
+					psmouse->name, psmouse->phys);
 		}
 		break;
 
@@ -295,9 +302,10 @@ static irqreturn_t psmouse_interrupt(struct serio *serio,
 		     ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) {
 
 		if (psmouse->state == PSMOUSE_ACTIVATED)
-			printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
-				flags & SERIO_TIMEOUT ? " timeout" : "",
-				flags & SERIO_PARITY ? " bad parity" : "");
+			psmouse_warn(psmouse,
+				     "bad data from KBC -%s%s\n",
+				     flags & SERIO_TIMEOUT ? " timeout" : "",
+				     flags & SERIO_PARITY ? " bad parity" : "");
 		ps2_cmd_aborted(&psmouse->ps2dev);
 		goto out;
 	}
@@ -315,8 +323,8 @@ static irqreturn_t psmouse_interrupt(struct serio *serio,
 
 	if (psmouse->state == PSMOUSE_ACTIVATED &&
 	    psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
-		printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
-		       psmouse->name, psmouse->phys, psmouse->pktcnt);
+		psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
+			     psmouse->name, psmouse->phys, psmouse->pktcnt);
 		psmouse->badbyte = psmouse->packet[0];
 		__psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
 		psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
@@ -943,7 +951,8 @@ static int psmouse_probe(struct psmouse *psmouse)
  */
 
 	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
-		printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
+		psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
+			     ps2dev->serio->phys);
 
 	return 0;
 }
@@ -1005,8 +1014,8 @@ static void psmouse_initialize(struct psmouse *psmouse)
 static void psmouse_activate(struct psmouse *psmouse)
 {
 	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
-		printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
-			psmouse->ps2dev.serio->phys);
+		psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
+			     psmouse->ps2dev.serio->phys);
 
 	psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 }
@@ -1020,14 +1029,14 @@ static void psmouse_activate(struct psmouse *psmouse)
 static void psmouse_deactivate(struct psmouse *psmouse)
 {
 	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
-		printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
-			psmouse->ps2dev.serio->phys);
+		psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
+			     psmouse->ps2dev.serio->phys);
 
 	psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 }
 
 /*
- * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
+ * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
  */
 
 static int psmouse_poll(struct psmouse *psmouse)
@@ -1115,14 +1124,15 @@ static void psmouse_resync(struct work_struct *work)
 	}
 
 	if (!enabled) {
-		printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
-			psmouse->ps2dev.serio->phys);
+		psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
+			     psmouse->ps2dev.serio->phys);
 		failed = true;
 	}
 
 	if (failed) {
 		psmouse_set_state(psmouse, PSMOUSE_IGNORE);
-		printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
+		psmouse_info(psmouse,
+			     "resync failed, issuing reconnect request\n");
 		serio_reconnect(serio);
 	} else
 		psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
@@ -1155,8 +1165,8 @@ static void psmouse_cleanup(struct serio *serio)
 	 * Disable stream mode so cleanup routine can proceed undisturbed.
 	 */
 	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
-		printk(KERN_WARNING "psmouse.c: Failed to disable mouse on %s\n",
-			psmouse->ps2dev.serio->phys);
+		psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
+			     psmouse->ps2dev.serio->phys);
 
 	if (psmouse->cleanup)
 		psmouse->cleanup(psmouse);
@@ -1400,7 +1410,8 @@ static int psmouse_reconnect(struct serio *serio)
 	int rc = -1;
 
 	if (!drv || !psmouse) {
-		printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
+		psmouse_dbg(psmouse,
+			    "reconnect request, but serio is disconnected, ignoring...\n");
 		return -1;
 	}
 
@@ -1427,8 +1438,9 @@ static int psmouse_reconnect(struct serio *serio)
 			goto out;
 	}
 
-	/* ok, the device type (and capabilities) match the old one,
-	 * we can continue using it, complete intialization
+	/*
+	 * OK, the device type (and capabilities) match the old one,
+	 * we can continue using it, complete initialization
 	 */
 	psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 
@@ -1586,9 +1598,8 @@ static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, co
 
 	while (!list_empty(&serio->children)) {
 		if (++retry > 3) {
-			printk(KERN_WARNING
-				"psmouse: failed to destroy children ports, "
-				"protocol change aborted.\n");
+			psmouse_warn(psmouse,
+				     "failed to destroy children ports, protocol change aborted.\n");
 			input_free_device(new_dev);
 			return -EIO;
 		}
@@ -1715,7 +1726,7 @@ static int __init psmouse_init(void)
 
 	kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
 	if (!kpsmoused_wq) {
-		printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
+		pr_err("failed to create kpsmoused workqueue\n");
 		return -ENOMEM;
 	}
 
diff --git a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h
index 593e910bfc7a..9b84b0c4e371 100644
--- a/drivers/input/mouse/psmouse.h
+++ b/drivers/input/mouse/psmouse.h
@@ -150,4 +150,29 @@ static struct psmouse_attribute psmouse_attr_##_name = {			\
 	static ssize_t _set(struct psmouse *, void *, const char *, size_t);	\
 	__PSMOUSE_DEFINE_ATTR_VAR(_name, _mode, _data, NULL, _set, true)
 
+#ifndef psmouse_fmt
+#define psmouse_fmt(fmt)	KBUILD_BASENAME ": " fmt
+#endif
+
+#define psmouse_dbg(psmouse, format, ...)		\
+	dev_dbg(&(psmouse)->ps2dev.serio->dev,		\
+		psmouse_fmt(format), ##__VA_ARGS__)
+#define psmouse_info(psmouse, format, ...)		\
+	dev_info(&(psmouse)->ps2dev.serio->dev,		\
+		 psmouse_fmt(format), ##__VA_ARGS__)
+#define psmouse_warn(psmouse, format, ...)		\
+	dev_warn(&(psmouse)->ps2dev.serio->dev,		\
+		 psmouse_fmt(format), ##__VA_ARGS__)
+#define psmouse_err(psmouse, format, ...)		\
+	dev_err(&(psmouse)->ps2dev.serio->dev,		\
+		psmouse_fmt(format), ##__VA_ARGS__)
+#define psmouse_notice(psmouse, format, ...)		\
+	dev_notice(&(psmouse)->ps2dev.serio->dev,	\
+		   psmouse_fmt(format), ##__VA_ARGS__)
+#define psmouse_printk(level, psmouse, format, ...)	\
+	dev_printk(level,				\
+		   &(psmouse)->ps2dev.serio->dev,	\
+		   psmouse_fmt(format), ##__VA_ARGS__)
+
+
 #endif /* _PSMOUSE_H */
diff --git a/drivers/input/mouse/pxa930_trkball.c b/drivers/input/mouse/pxa930_trkball.c
index 6c5d84fcdea1..ee3b0ca9d592 100644
--- a/drivers/input/mouse/pxa930_trkball.c
+++ b/drivers/input/mouse/pxa930_trkball.c
@@ -183,7 +183,7 @@ static int __devinit pxa930_trkball_probe(struct platform_device *pdev)
 	/* held the module in reset, will be enabled in open() */
 	pxa930_trkball_disable(trkball);
 
-	error = request_irq(irq, pxa930_trkball_interrupt, IRQF_DISABLED,
+	error = request_irq(irq, pxa930_trkball_interrupt, 0,
 			    pdev->name, trkball);
 	if (error) {
 		dev_err(&pdev->dev, "failed to request irq: %d\n", error);
diff --git a/drivers/input/mouse/sentelic.c b/drivers/input/mouse/sentelic.c
index 2fc887a51066..c5b12d2e955a 100644
--- a/drivers/input/mouse/sentelic.c
+++ b/drivers/input/mouse/sentelic.c
@@ -607,11 +607,12 @@ static void fsp_packet_debug(unsigned char packet[])
 
 	ps2_packet_cnt++;
 	jiffies_msec = jiffies_to_msecs(jiffies);
-	printk(KERN_DEBUG "%08dms PS/2 packets: %02x, %02x, %02x, %02x\n",
-		jiffies_msec, packet[0], packet[1], packet[2], packet[3]);
+	psmouse_dbg(psmouse,
+		    "%08dms PS/2 packets: %02x, %02x, %02x, %02x\n",
+		    jiffies_msec, packet[0], packet[1], packet[2], packet[3]);
 
 	if (jiffies_msec - ps2_last_second > 1000) {
-		printk(KERN_DEBUG "PS/2 packets/sec = %d\n", ps2_packet_cnt);
+		psmouse_dbg(psmouse, "PS/2 packets/sec = %d\n", ps2_packet_cnt);
 		ps2_packet_cnt = 0;
 		ps2_last_second = jiffies_msec;
 	}
@@ -820,9 +821,9 @@ int fsp_init(struct psmouse *psmouse)
 		return -ENODEV;
 	}
 
-	printk(KERN_INFO
-		"Finger Sensing Pad, hw: %d.%d.%d, sw: %s, buttons: %d\n",
-		ver >> 4, ver & 0x0F, rev, fsp_drv_ver, buttons & 7);
+	psmouse_info(psmouse,
+		     "Finger Sensing Pad, hw: %d.%d.%d, sw: %s, buttons: %d\n",
+		     ver >> 4, ver & 0x0F, rev, fsp_drv_ver, buttons & 7);
 
 	psmouse->private = priv = kzalloc(sizeof(struct fsp_data), GFP_KERNEL);
 	if (!priv)
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 5538fc657af1..c080b828e5dc 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -44,6 +44,16 @@
 #define YMIN_NOMINAL 1408
 #define YMAX_NOMINAL 4448
 
+/*
+ * Synaptics touchpads report the y coordinate from bottom to top, which is
+ * opposite from what userspace expects.
+ * This function is used to invert y before reporting.
+ */
+static int synaptics_invert_y(int y)
+{
+	return YMAX_NOMINAL + YMIN_NOMINAL - y;
+}
+
 
 /*****************************************************************************
  *	Stuff we need even when we do not want native Synaptics support
@@ -157,8 +167,8 @@ static int synaptics_capability(struct psmouse *psmouse)
 
 	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
-			printk(KERN_ERR "Synaptics claims to have extended capabilities,"
-			       " but I'm not able to read them.\n");
+			psmouse_warn(psmouse,
+				     "device claims to have extended capabilities, but I'm not able to read them.\n");
 		} else {
 			priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 
@@ -173,8 +183,8 @@ static int synaptics_capability(struct psmouse *psmouse)
 
 	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
-			printk(KERN_ERR "Synaptics claims to have extended capability 0x0c,"
-			       " but I'm not able to read it.\n");
+			psmouse_warn(psmouse,
+				     "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 		} else {
 			priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 		}
@@ -222,8 +232,8 @@ static int synaptics_resolution(struct psmouse *psmouse)
 	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 	    SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
-			printk(KERN_ERR "Synaptics claims to have max coordinates"
-			       " query, but I'm not able to read it.\n");
+			psmouse_warn(psmouse,
+				     "device claims to have max coordinates query, but I'm not able to read it.\n");
 		} else {
 			priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 			priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
@@ -233,8 +243,8 @@ static int synaptics_resolution(struct psmouse *psmouse)
 	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
 	    SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
 		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
-			printk(KERN_ERR "Synaptics claims to have min coordinates"
-			       " query, but I'm not able to read it.\n");
+			psmouse_warn(psmouse,
+				     "device claims to have min coordinates query, but I'm not able to read it.\n");
 		} else {
 			priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 			priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
@@ -294,7 +304,8 @@ static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 	static unsigned char param = 0xc8;
 	struct synaptics_data *priv = psmouse->private;
 
-	if (!SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
+	if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
+			SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 		return 0;
 
 	if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
@@ -377,7 +388,8 @@ static void synaptics_pt_activate(struct psmouse *psmouse)
 			priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 
 		if (synaptics_mode_cmd(psmouse, priv->mode))
-			printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
+			psmouse_warn(psmouse,
+				     "failed to switch guest protocol\n");
 	}
 }
 
@@ -387,7 +399,8 @@ static void synaptics_pt_create(struct psmouse *psmouse)
 
 	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 	if (!serio) {
-		printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
+		psmouse_err(psmouse,
+			    "not enough memory for pass-through port\n");
 		return;
 	}
 
@@ -401,7 +414,8 @@ static void synaptics_pt_create(struct psmouse *psmouse)
 
 	psmouse->pt_activate = synaptics_pt_activate;
 
-	printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
+	psmouse_info(psmouse, "serio: %s port at %s\n",
+		     serio->name, psmouse->phys);
 	serio_register_port(serio);
 }
 
@@ -409,6 +423,44 @@ static void synaptics_pt_create(struct psmouse *psmouse)
  *	Functions to interpret the absolute mode packets
  ****************************************************************************/
 
+static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
+				   int sgm, int agm)
+{
+	state->count = count;
+	state->sgm = sgm;
+	state->agm = agm;
+}
+
+static void synaptics_parse_agm(const unsigned char buf[],
+				struct synaptics_data *priv,
+				struct synaptics_hw_state *hw)
+{
+	struct synaptics_hw_state *agm = &priv->agm;
+	int agm_packet_type;
+
+	agm_packet_type = (buf[5] & 0x30) >> 4;
+	switch (agm_packet_type) {
+	case 1:
+		/* Gesture packet: (x, y, z) half resolution */
+		agm->w = hw->w;
+		agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
+		agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
+		agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
+		break;
+
+	case 2:
+		/* AGM-CONTACT packet: (count, sgm, agm) */
+		synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
+		break;
+
+	default:
+		break;
+	}
+
+	/* Record that at least one AGM has been received since last SGM */
+	priv->agm_pending = true;
+}
+
 static int synaptics_parse_hw_state(const unsigned char buf[],
 				    struct synaptics_data *priv,
 				    struct synaptics_hw_state *hw)
@@ -442,11 +494,10 @@ static int synaptics_parse_hw_state(const unsigned char buf[],
 			hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 		}
 
-		if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) && hw->w == 2) {
-			/* Gesture packet: (x, y, z) at half resolution */
-			priv->mt.x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
-			priv->mt.y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
-			priv->mt.z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
+		if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
+			SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
+		    hw->w == 2) {
+			synaptics_parse_agm(buf, priv, hw);
 			return 1;
 		}
 
@@ -502,8 +553,7 @@ static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 	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,
-				 YMAX_NOMINAL + YMIN_NOMINAL - y);
+		input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 	}
 }
 
@@ -526,6 +576,388 @@ static void synaptics_report_semi_mt_data(struct input_dev *dev,
 	}
 }
 
+static void synaptics_report_buttons(struct psmouse *psmouse,
+				     const struct synaptics_hw_state *hw)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct synaptics_data *priv = psmouse->private;
+	int i;
+
+	input_report_key(dev, BTN_LEFT, hw->left);
+	input_report_key(dev, BTN_RIGHT, hw->right);
+
+	if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
+		input_report_key(dev, BTN_MIDDLE, hw->middle);
+
+	if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
+		input_report_key(dev, BTN_FORWARD, hw->up);
+		input_report_key(dev, BTN_BACK, hw->down);
+	}
+
+	for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
+		input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
+}
+
+static void synaptics_report_slot(struct input_dev *dev, int slot,
+				  const struct synaptics_hw_state *hw)
+{
+	input_mt_slot(dev, slot);
+	input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
+	if (!hw)
+		return;
+
+	input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
+	input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
+	input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
+}
+
+static void synaptics_report_mt_data(struct psmouse *psmouse,
+				     struct synaptics_mt_state *mt_state,
+				     const struct synaptics_hw_state *sgm)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct synaptics_data *priv = psmouse->private;
+	struct synaptics_hw_state *agm = &priv->agm;
+	struct synaptics_mt_state *old = &priv->mt_state;
+
+	switch (mt_state->count) {
+	case 0:
+		synaptics_report_slot(dev, 0, NULL);
+		synaptics_report_slot(dev, 1, NULL);
+		break;
+	case 1:
+		if (mt_state->sgm == -1) {
+			synaptics_report_slot(dev, 0, NULL);
+			synaptics_report_slot(dev, 1, NULL);
+		} else if (mt_state->sgm == 0) {
+			synaptics_report_slot(dev, 0, sgm);
+			synaptics_report_slot(dev, 1, NULL);
+		} else {
+			synaptics_report_slot(dev, 0, NULL);
+			synaptics_report_slot(dev, 1, sgm);
+		}
+		break;
+	default:
+		/*
+		 * If the finger slot contained in SGM is valid, and either
+		 * hasn't changed, or is new, then report SGM in MTB slot 0.
+		 * Otherwise, empty MTB slot 0.
+		 */
+		if (mt_state->sgm != -1 &&
+		    (mt_state->sgm == old->sgm || old->sgm == -1))
+			synaptics_report_slot(dev, 0, sgm);
+		else
+			synaptics_report_slot(dev, 0, NULL);
+
+		/*
+		 * If the finger slot contained in AGM is valid, and either
+		 * hasn't changed, or is new, then report AGM in MTB slot 1.
+		 * Otherwise, empty MTB slot 1.
+		 */
+		if (mt_state->agm != -1 &&
+		    (mt_state->agm == old->agm || old->agm == -1))
+			synaptics_report_slot(dev, 1, agm);
+		else
+			synaptics_report_slot(dev, 1, NULL);
+		break;
+	}
+
+	/* Don't use active slot count to generate BTN_TOOL events. */
+	input_mt_report_pointer_emulation(dev, false);
+
+	/* Send the number of fingers reported by touchpad itself. */
+	input_mt_report_finger_count(dev, mt_state->count);
+
+	synaptics_report_buttons(psmouse, sgm);
+
+	input_sync(dev);
+}
+
+/* Handle case where mt_state->count = 0 */
+static void synaptics_image_sensor_0f(struct synaptics_data *priv,
+				      struct synaptics_mt_state *mt_state)
+{
+	synaptics_mt_state_set(mt_state, 0, -1, -1);
+	priv->mt_state_lost = false;
+}
+
+/* Handle case where mt_state->count = 1 */
+static void synaptics_image_sensor_1f(struct synaptics_data *priv,
+				      struct synaptics_mt_state *mt_state)
+{
+	struct synaptics_hw_state *agm = &priv->agm;
+	struct synaptics_mt_state *old = &priv->mt_state;
+
+	/*
+	 * If the last AGM was (0,0,0), and there is only one finger left,
+	 * then we absolutely know that SGM contains slot 0, and all other
+	 * fingers have been removed.
+	 */
+	if (priv->agm_pending && agm->z == 0) {
+		synaptics_mt_state_set(mt_state, 1, 0, -1);
+		priv->mt_state_lost = false;
+		return;
+	}
+
+	switch (old->count) {
+	case 0:
+		synaptics_mt_state_set(mt_state, 1, 0, -1);
+		break;
+	case 1:
+		/*
+		 * If mt_state_lost, then the previous transition was 3->1,
+		 * and SGM now contains either slot 0 or 1, but we don't know
+		 * which.  So, we just assume that the SGM now contains slot 1.
+		 *
+		 * If pending AGM and either:
+		 *   (a) the previous SGM slot contains slot 0, or
+		 *   (b) there was no SGM slot
+		 * then, the SGM now contains slot 1
+		 *
+		 * Case (a) happens with very rapid "drum roll" gestures, where
+		 * slot 0 finger is lifted and a new slot 1 finger touches
+		 * within one reporting interval.
+		 *
+		 * Case (b) happens if initially two or more fingers tap
+		 * briefly, and all but one lift before the end of the first
+		 * reporting interval.
+		 *
+		 * (In both these cases, slot 0 will becomes empty, so SGM
+		 * contains slot 1 with the new finger)
+		 *
+		 * Else, if there was no previous SGM, it now contains slot 0.
+		 *
+		 * Otherwise, SGM still contains the same slot.
+		 */
+		if (priv->mt_state_lost ||
+		    (priv->agm_pending && old->sgm <= 0))
+			synaptics_mt_state_set(mt_state, 1, 1, -1);
+		else if (old->sgm == -1)
+			synaptics_mt_state_set(mt_state, 1, 0, -1);
+		break;
+	case 2:
+		/*
+		 * If mt_state_lost, we don't know which finger SGM contains.
+		 *
+		 * So, report 1 finger, but with both slots empty.
+		 * We will use slot 1 on subsequent 1->1
+		 */
+		if (priv->mt_state_lost) {
+			synaptics_mt_state_set(mt_state, 1, -1, -1);
+			break;
+		}
+		/*
+		 * Since the last AGM was NOT (0,0,0), it was the finger in
+		 * slot 0 that has been removed.
+		 * So, SGM now contains previous AGM's slot, and AGM is now
+		 * empty.
+		 */
+		synaptics_mt_state_set(mt_state, 1, old->agm, -1);
+		break;
+	case 3:
+		/*
+		 * Since last AGM was not (0,0,0), we don't know which finger
+		 * is left.
+		 *
+		 * So, report 1 finger, but with both slots empty.
+		 * We will use slot 1 on subsequent 1->1
+		 */
+		synaptics_mt_state_set(mt_state, 1, -1, -1);
+		priv->mt_state_lost = true;
+		break;
+	case 4:
+	case 5:
+		/* mt_state was updated by AGM-CONTACT packet */
+		break;
+	}
+}
+
+/* Handle case where mt_state->count = 2 */
+static void synaptics_image_sensor_2f(struct synaptics_data *priv,
+				      struct synaptics_mt_state *mt_state)
+{
+	struct synaptics_mt_state *old = &priv->mt_state;
+
+	switch (old->count) {
+	case 0:
+		synaptics_mt_state_set(mt_state, 2, 0, 1);
+		break;
+	case 1:
+		/*
+		 * If previous SGM contained slot 1 or higher, SGM now contains
+		 * slot 0 (the newly touching finger) and AGM contains SGM's
+		 * previous slot.
+		 *
+		 * Otherwise, SGM still contains slot 0 and AGM now contains
+		 * slot 1.
+		 */
+		if (old->sgm >= 1)
+			synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
+		else
+			synaptics_mt_state_set(mt_state, 2, 0, 1);
+		break;
+	case 2:
+		/*
+		 * If mt_state_lost, SGM now contains either finger 1 or 2, but
+		 * we don't know which.
+		 * So, we just assume that the SGM contains slot 0 and AGM 1.
+		 */
+		if (priv->mt_state_lost)
+			synaptics_mt_state_set(mt_state, 2, 0, 1);
+		/*
+		 * Otherwise, use the same mt_state, since it either hasn't
+		 * changed, or was updated by a recently received AGM-CONTACT
+		 * packet.
+		 */
+		break;
+	case 3:
+		/*
+		 * 3->2 transitions have two unsolvable problems:
+		 *  1) no indication is given which finger was removed
+		 *  2) no way to tell if agm packet was for finger 3
+		 *     before 3->2, or finger 2 after 3->2.
+		 *
+		 * So, report 2 fingers, but empty all slots.
+		 * We will guess slots [0,1] on subsequent 2->2.
+		 */
+		synaptics_mt_state_set(mt_state, 2, -1, -1);
+		priv->mt_state_lost = true;
+		break;
+	case 4:
+	case 5:
+		/* mt_state was updated by AGM-CONTACT packet */
+		break;
+	}
+}
+
+/* Handle case where mt_state->count = 3 */
+static void synaptics_image_sensor_3f(struct synaptics_data *priv,
+				      struct synaptics_mt_state *mt_state)
+{
+	struct synaptics_mt_state *old = &priv->mt_state;
+
+	switch (old->count) {
+	case 0:
+		synaptics_mt_state_set(mt_state, 3, 0, 2);
+		break;
+	case 1:
+		/*
+		 * If previous SGM contained slot 2 or higher, SGM now contains
+		 * slot 0 (one of the newly touching fingers) and AGM contains
+		 * SGM's previous slot.
+		 *
+		 * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
+		 */
+		if (old->sgm >= 2)
+			synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
+		else
+			synaptics_mt_state_set(mt_state, 3, 0, 2);
+		break;
+	case 2:
+		/*
+		 * If the AGM previously contained slot 3 or higher, then the
+		 * newly touching finger is in the lowest available slot.
+		 *
+		 * If SGM was previously 1 or higher, then the new SGM is
+		 * now slot 0 (with a new finger), otherwise, the new finger
+		 * is now in a hidden slot between 0 and AGM's slot.
+		 *
+		 * In all such cases, the SGM now contains slot 0, and the AGM
+		 * continues to contain the same slot as before.
+		 */
+		if (old->agm >= 3) {
+			synaptics_mt_state_set(mt_state, 3, 0, old->agm);
+			break;
+		}
+
+		/*
+		 * After some 3->1 and all 3->2 transitions, we lose track
+		 * of which slot is reported by SGM and AGM.
+		 *
+		 * For 2->3 in this state, report 3 fingers, but empty all
+		 * slots, and we will guess (0,2) on a subsequent 0->3.
+		 *
+		 * To userspace, the resulting transition will look like:
+		 *    2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
+		 */
+		if (priv->mt_state_lost) {
+			synaptics_mt_state_set(mt_state, 3, -1, -1);
+			break;
+		}
+
+		/*
+		 * If the (SGM,AGM) really previously contained slots (0, 1),
+		 * then we cannot know what slot was just reported by the AGM,
+		 * because the 2->3 transition can occur either before or after
+		 * the AGM packet. Thus, this most recent AGM could contain
+		 * either the same old slot 1 or the new slot 2.
+		 * Subsequent AGMs will be reporting slot 2.
+		 *
+		 * To userspace, the resulting transition will look like:
+		 *    2:[0,1] -> 3:[0,-1] -> 3:[0,2]
+		 */
+		synaptics_mt_state_set(mt_state, 3, 0, -1);
+		break;
+	case 3:
+		/*
+		 * If, for whatever reason, the previous agm was invalid,
+		 * Assume SGM now contains slot 0, AGM now contains slot 2.
+		 */
+		if (old->agm <= 2)
+			synaptics_mt_state_set(mt_state, 3, 0, 2);
+		/*
+		 * mt_state either hasn't changed, or was updated by a recently
+		 * received AGM-CONTACT packet.
+		 */
+		break;
+
+	case 4:
+	case 5:
+		/* mt_state was updated by AGM-CONTACT packet */
+		break;
+	}
+}
+
+/* Handle case where mt_state->count = 4, or = 5 */
+static void synaptics_image_sensor_45f(struct synaptics_data *priv,
+				       struct synaptics_mt_state *mt_state)
+{
+	/* mt_state was updated correctly by AGM-CONTACT packet */
+	priv->mt_state_lost = false;
+}
+
+static void synaptics_image_sensor_process(struct psmouse *psmouse,
+					   struct synaptics_hw_state *sgm)
+{
+	struct synaptics_data *priv = psmouse->private;
+	struct synaptics_hw_state *agm = &priv->agm;
+	struct synaptics_mt_state mt_state;
+
+	/* Initialize using current mt_state (as updated by last agm) */
+	mt_state = agm->mt_state;
+
+	/*
+	 * Update mt_state using the new finger count and current mt_state.
+	 */
+	if (sgm->z == 0)
+		synaptics_image_sensor_0f(priv, &mt_state);
+	else if (sgm->w >= 4)
+		synaptics_image_sensor_1f(priv, &mt_state);
+	else if (sgm->w == 0)
+		synaptics_image_sensor_2f(priv, &mt_state);
+	else if (sgm->w == 1 && mt_state.count <= 3)
+		synaptics_image_sensor_3f(priv, &mt_state);
+	else
+		synaptics_image_sensor_45f(priv, &mt_state);
+
+	/* Send resulting input events to user space */
+	synaptics_report_mt_data(psmouse, &mt_state, sgm);
+
+	/* Store updated mt_state */
+	priv->mt_state = agm->mt_state = mt_state;
+	priv->agm_pending = false;
+}
+
 /*
  *  called for each full received packet from the touchpad
  */
@@ -536,11 +968,15 @@ static void synaptics_process_packet(struct psmouse *psmouse)
 	struct synaptics_hw_state hw;
 	int num_fingers;
 	int finger_width;
-	int i;
 
 	if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 		return;
 
+	if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
+		synaptics_image_sensor_process(psmouse, &hw);
+		return;
+	}
+
 	if (hw.scroll) {
 		priv->scroll += hw.scroll;
 
@@ -586,7 +1022,8 @@ static void synaptics_process_packet(struct psmouse *psmouse)
 	}
 
 	if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
-		synaptics_report_semi_mt_data(dev, &hw, &priv->mt, num_fingers);
+		synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
+					      num_fingers);
 
 	/* Post events
 	 * BTN_TOUCH has to be first as mousedev relies on it when doing
@@ -597,7 +1034,7 @@ static void synaptics_process_packet(struct psmouse *psmouse)
 
 	if (num_fingers > 0) {
 		input_report_abs(dev, ABS_X, hw.x);
-		input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
+		input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
 	}
 	input_report_abs(dev, ABS_PRESSURE, hw.z);
 
@@ -605,35 +1042,25 @@ static void synaptics_process_packet(struct psmouse *psmouse)
 		input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 
 	input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
-	input_report_key(dev, BTN_LEFT, hw.left);
-	input_report_key(dev, BTN_RIGHT, hw.right);
-
 	if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 		input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 		input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 	}
 
-	if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
-		input_report_key(dev, BTN_MIDDLE, hw.middle);
-
-	if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
-		input_report_key(dev, BTN_FORWARD, hw.up);
-		input_report_key(dev, BTN_BACK, hw.down);
-	}
-
-	for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
-		input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
+	synaptics_report_buttons(psmouse, &hw);
 
 	input_sync(dev);
 }
 
-static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
+static int synaptics_validate_byte(struct psmouse *psmouse,
+				   int idx, unsigned char pkt_type)
 {
 	static const unsigned char newabs_mask[]	= { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 	static const unsigned char newabs_rel_mask[]	= { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 	static const unsigned char newabs_rslt[]	= { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 	static const unsigned char oldabs_mask[]	= { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 	static const unsigned char oldabs_rslt[]	= { 0xC0, 0x00, 0x00, 0x80, 0x00 };
+	const char *packet = psmouse->packet;
 
 	if (idx < 0 || idx > 4)
 		return 0;
@@ -651,7 +1078,7 @@ static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned cha
 		return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 
 	default:
-		printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
+		psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
 		return 0;
 	}
 }
@@ -661,8 +1088,8 @@ static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 	int i;
 
 	for (i = 0; i < 5; i++)
-		if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
-			printk(KERN_INFO "synaptics: using relaxed packet validation\n");
+		if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
+			psmouse_info(psmouse, "using relaxed packet validation\n");
 			return SYN_NEWABS_RELAXED;
 		}
 
@@ -687,46 +1114,56 @@ static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 		return PSMOUSE_FULL_PACKET;
 	}
 
-	return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
+	return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
 		PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 }
 
 /*****************************************************************************
  *	Driver initialization/cleanup functions
  ****************************************************************************/
-static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
+static void set_abs_position_params(struct input_dev *dev,
+				    struct synaptics_data *priv, int x_code,
+				    int y_code)
 {
-	int i;
+	int x_min = priv->x_min ?: XMIN_NOMINAL;
+	int x_max = priv->x_max ?: XMAX_NOMINAL;
+	int y_min = priv->y_min ?: YMIN_NOMINAL;
+	int y_max = priv->y_max ?: YMAX_NOMINAL;
 	int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
 			SYN_REDUCED_FILTER_FUZZ : 0;
 
+	input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
+	input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
+	input_abs_set_res(dev, x_code, priv->x_res);
+	input_abs_set_res(dev, y_code, priv->y_res);
+}
+
+static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
+{
+	int i;
+
 	__set_bit(INPUT_PROP_POINTER, dev->propbit);
 
 	__set_bit(EV_ABS, dev->evbit);
-	input_set_abs_params(dev, ABS_X,
-			     priv->x_min ?: XMIN_NOMINAL,
-			     priv->x_max ?: XMAX_NOMINAL,
-			     fuzz, 0);
-	input_set_abs_params(dev, ABS_Y,
-			     priv->y_min ?: YMIN_NOMINAL,
-			     priv->y_max ?: YMAX_NOMINAL,
-			     fuzz, 0);
+	set_abs_position_params(dev, priv, ABS_X, ABS_Y);
 	input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
 
-	if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
+	if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
+		input_mt_init_slots(dev, 2);
+		set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
+					ABS_MT_POSITION_Y);
+		/* Image sensors can report per-contact pressure */
+		input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
+
+		/* Image sensors can signal 4 and 5 finger clicks */
+		__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
+		__set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
+	} else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
+		/* Non-image sensors with AGM use semi-mt */
 		__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
 		input_mt_init_slots(dev, 2);
-		input_set_abs_params(dev, ABS_MT_POSITION_X,
-				     priv->x_min ?: XMIN_NOMINAL,
-				     priv->x_max ?: XMAX_NOMINAL,
-				     fuzz, 0);
-		input_set_abs_params(dev, ABS_MT_POSITION_Y,
-				     priv->y_min ?: YMIN_NOMINAL,
-				     priv->y_max ?: YMAX_NOMINAL,
-				     fuzz, 0);
-
-		input_abs_set_res(dev, ABS_MT_POSITION_X, priv->x_res);
-		input_abs_set_res(dev, ABS_MT_POSITION_Y, priv->y_res);
+		set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
+					ABS_MT_POSITION_Y);
 	}
 
 	if (SYN_CAP_PALMDETECT(priv->capabilities))
@@ -759,9 +1196,6 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 	__clear_bit(REL_X, dev->relbit);
 	__clear_bit(REL_Y, dev->relbit);
 
-	input_abs_set_res(dev, ABS_X, priv->x_res);
-	input_abs_set_res(dev, ABS_Y, priv->y_res);
-
 	if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 		__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
 		/* Clickpads report only left button */
@@ -793,21 +1227,21 @@ static int synaptics_reconnect(struct psmouse *psmouse)
 		return -1;
 
 	if (retry > 1)
-		printk(KERN_DEBUG "Synaptics reconnected after %d tries\n",
-			retry);
+		psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
 
 	if (synaptics_query_hardware(psmouse)) {
-		printk(KERN_ERR "Unable to query Synaptics hardware.\n");
+		psmouse_err(psmouse, "Unable to query device.\n");
 		return -1;
 	}
 
 	if (synaptics_set_absolute_mode(psmouse)) {
-		printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
+		psmouse_err(psmouse, "Unable to initialize device.\n");
 		return -1;
 	}
 
 	if (synaptics_set_advanced_gesture_mode(psmouse)) {
-		printk(KERN_ERR "Advanced gesture mode reconnect failed.\n");
+		psmouse_err(psmouse,
+			    "Advanced gesture mode reconnect failed.\n");
 		return -1;
 	}
 
@@ -815,12 +1249,12 @@ static int synaptics_reconnect(struct psmouse *psmouse)
 	    old_priv.model_id != priv->model_id ||
 	    old_priv.capabilities != priv->capabilities ||
 	    old_priv.ext_cap != priv->ext_cap) {
-		printk(KERN_ERR "Synaptics hardware appears to be different: "
-			"id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
-			old_priv.identity, priv->identity,
-			old_priv.model_id, priv->model_id,
-			old_priv.capabilities, priv->capabilities,
-			old_priv.ext_cap, priv->ext_cap);
+		psmouse_err(psmouse,
+			    "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
+			    old_priv.identity, priv->identity,
+			    old_priv.model_id, priv->model_id,
+			    old_priv.capabilities, priv->capabilities,
+			    old_priv.ext_cap, priv->ext_cap);
 		return -1;
 	}
 
@@ -901,7 +1335,8 @@ int synaptics_init(struct psmouse *psmouse)
 	 * just fine.
 	 */
 	if (broken_olpc_ec) {
-		printk(KERN_INFO "synaptics: OLPC XO detected, not enabling Synaptics protocol.\n");
+		psmouse_info(psmouse,
+			     "OLPC XO detected, not enabling Synaptics protocol.\n");
 		return -ENODEV;
 	}
 
@@ -912,26 +1347,28 @@ int synaptics_init(struct psmouse *psmouse)
 	psmouse_reset(psmouse);
 
 	if (synaptics_query_hardware(psmouse)) {
-		printk(KERN_ERR "Unable to query Synaptics hardware.\n");
+		psmouse_err(psmouse, "Unable to query device.\n");
 		goto init_fail;
 	}
 
 	if (synaptics_set_absolute_mode(psmouse)) {
-		printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
+		psmouse_err(psmouse, "Unable to initialize device.\n");
 		goto init_fail;
 	}
 
 	if (synaptics_set_advanced_gesture_mode(psmouse)) {
-		printk(KERN_ERR "Advanced gesture mode init failed.\n");
+		psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 		goto init_fail;
 	}
 
 	priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
 
-	printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
-		SYN_ID_MODEL(priv->identity),
-		SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
-		priv->model_id, priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
+	psmouse_info(psmouse,
+		     "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
+		     SYN_ID_MODEL(priv->identity),
+		     SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
+		     priv->model_id,
+		     priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
 
 	set_input_params(psmouse->dev, priv);
 
@@ -963,8 +1400,9 @@ int synaptics_init(struct psmouse *psmouse)
 	 * the same rate as a standard PS/2 mouse).
 	 */
 	if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
-		printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
-			dmi_get_system_info(DMI_PRODUCT_NAME));
+		psmouse_info(psmouse,
+			     "Toshiba %s detected, limiting rate to 40pps.\n",
+			     dmi_get_system_info(DMI_PRODUCT_NAME));
 		psmouse->rate = 40;
 	}
 
diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index ca040aa80fa7..622aea8dd7e0 100644
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -74,6 +74,8 @@
  * 2	0x04	reduced filtering	firmware does less filtering on
  *					position data, driver should watch
  *					for noise.
+ * 2	0x08	image sensor		image sensor tracks 5 fingers, but only
+ *					reports 2.
  * 2	0x20	report min		query 0x0f gives min coord reported
  */
 #define SYN_CAP_CLICKPAD(ex0c)		((ex0c) & 0x100000) /* 1-button ClickPad */
@@ -82,6 +84,7 @@
 #define SYN_CAP_MIN_DIMENSIONS(ex0c)	((ex0c) & 0x002000)
 #define SYN_CAP_ADV_GESTURE(ex0c)	((ex0c) & 0x080000)
 #define SYN_CAP_REDUCED_FILTERING(ex0c)	((ex0c) & 0x000400)
+#define SYN_CAP_IMAGE_SENSOR(ex0c)	((ex0c) & 0x000800)
 
 /* synaptics modes query bits */
 #define SYN_MODE_ABSOLUTE(m)		((m) & (1 << 7))
@@ -112,9 +115,18 @@
 #define SYN_REDUCED_FILTER_FUZZ		8
 
 /*
- * A structure to describe the state of the touchpad hardware (buttons and pad)
+ * A structure to describe which internal touchpad finger slots are being
+ * reported in raw packets.
  */
+struct synaptics_mt_state {
+	int count;			/* num fingers being tracked */
+	int sgm;			/* which slot is reported by sgm pkt */
+	int agm;			/* which slot is reported by agm pkt*/
+};
 
+/*
+ * A structure to describe the state of the touchpad hardware (buttons and pad)
+ */
 struct synaptics_hw_state {
 	int x;
 	int y;
@@ -127,6 +139,9 @@ struct synaptics_hw_state {
 	unsigned int down:1;
 	unsigned char ext_buttons;
 	signed char scroll;
+
+	/* As reported in last AGM-CONTACT packets */
+	struct synaptics_mt_state mt_state;
 };
 
 struct synaptics_data {
@@ -146,7 +161,15 @@ struct synaptics_data {
 
 	struct serio *pt_port;			/* Pass-through serio port */
 
-	struct synaptics_hw_state mt;		/* current gesture packet */
+	struct synaptics_mt_state mt_state;	/* Current mt finger state */
+	bool mt_state_lost;			/* mt_state may be incorrect */
+
+	/*
+	 * Last received Advanced Gesture Mode (AGM) packet. An AGM packet
+	 * contains position data for a second contact, at half resolution.
+	 */
+	struct synaptics_hw_state agm;
+	bool agm_pending;			/* new AGM packet received */
 };
 
 void synaptics_module_init(void);
diff --git a/drivers/input/mouse/synaptics_i2c.c b/drivers/input/mouse/synaptics_i2c.c
index cba3c84d2f21..4b755cb5b38c 100644
--- a/drivers/input/mouse/synaptics_i2c.c
+++ b/drivers/input/mouse/synaptics_i2c.c
@@ -570,7 +570,7 @@ static int __devinit synaptics_i2c_probe(struct i2c_client *client,
 			 "Requesting IRQ: %d\n", touch->client->irq);
 
 		ret = request_irq(touch->client->irq, synaptics_i2c_irq,
-				  IRQF_DISABLED|IRQ_TYPE_EDGE_FALLING,
+				  IRQ_TYPE_EDGE_FALLING,
 				  DRIVER_NAME, touch);
 		if (ret) {
 			dev_warn(&touch->client->dev,
@@ -619,7 +619,7 @@ static int __devexit synaptics_i2c_remove(struct i2c_client *client)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int synaptics_i2c_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);