Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 1394 deletions

diff --git a/ANDROID_3.4.5/drivers/input/mouse/elantech.c b/ANDROID_3.4.5/drivers/input/mouse/elantech.c
deleted file mode 100644
index 47901100..00000000
--- a/ANDROID_3.4.5/drivers/input/mouse/elantech.c
+++ /dev/null
@@ -1,1394 +0,0 @@
-/*
- * Elantech Touchpad driver (v6)
- *
- * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- * Trademarks are the property of their respective owners.
- */
-
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/input.h>
-#include <linux/input/mt.h>
-#include <linux/serio.h>
-#include <linux/libps2.h>
-#include "psmouse.h"
-#include "elantech.h"
-
-#define elantech_debug(fmt, ...)					\
-	do {								\
-		if (etd->debug)						\
-			psmouse_printk(KERN_DEBUG, psmouse,		\
-					fmt, ##__VA_ARGS__);		\
-	} while (0)
-
-/*
- * Send a Synaptics style sliced query command
- */
-static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c,
-				unsigned char *param)
-{
-	if (psmouse_sliced_command(psmouse, c) ||
-	    ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
-		psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c);
-		return -1;
-	}
-
-	return 0;
-}
-
-/*
- * V3 and later support this fast command
- */
-static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c,
-				unsigned char *param)
-{
-	struct ps2dev *ps2dev = &psmouse->ps2dev;
-
-	if (ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) ||
-	    ps2_command(ps2dev, NULL, c) ||
-	    ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
-		psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c);
-		return -1;
-	}
-
-	return 0;
-}
-
-/*
- * A retrying version of ps2_command
- */
-static int elantech_ps2_command(struct psmouse *psmouse,
-				unsigned char *param, int command)
-{
-	struct ps2dev *ps2dev = &psmouse->ps2dev;
-	struct elantech_data *etd = psmouse->private;
-	int rc;
-	int tries = ETP_PS2_COMMAND_TRIES;
-
-	do {
-		rc = ps2_command(ps2dev, param, command);
-		if (rc == 0)
-			break;
-		tries--;
-		elantech_debug("retrying ps2 command 0x%02x (%d).\n",
-				command, tries);
-		msleep(ETP_PS2_COMMAND_DELAY);
-	} while (tries > 0);
-
-	if (rc)
-		psmouse_err(psmouse, "ps2 command 0x%02x failed.\n", command);
-
-	return rc;
-}
-
-/*
- * Send an Elantech style special command to read a value from a register
- */
-static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
-				unsigned char *val)
-{
-	struct elantech_data *etd = psmouse->private;
-	unsigned char param[3];
-	int rc = 0;
-
-	if (reg < 0x07 || reg > 0x26)
-		return -1;
-
-	if (reg > 0x11 && reg < 0x20)
-		return -1;
-
-	switch (etd->hw_version) {
-	case 1:
-		if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) ||
-		    psmouse_sliced_command(psmouse, reg) ||
-		    ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
-			rc = -1;
-		}
-		break;
-
-	case 2:
-		if (elantech_ps2_command(psmouse,  NULL, ETP_PS2_CUSTOM_COMMAND) ||
-		    elantech_ps2_command(psmouse,  NULL, ETP_REGISTER_READ) ||
-		    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;
-
-	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)
-		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;
-}
-
-/*
- * Send an Elantech style special command to write a register with a value
- */
-static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
-				unsigned char val)
-{
-	struct elantech_data *etd = psmouse->private;
-	int rc = 0;
-
-	if (reg < 0x07 || reg > 0x26)
-		return -1;
-
-	if (reg > 0x11 && reg < 0x20)
-		return -1;
-
-	switch (etd->hw_version) {
-	case 1:
-		if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) ||
-		    psmouse_sliced_command(psmouse, reg) ||
-		    psmouse_sliced_command(psmouse, val) ||
-		    ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) {
-			rc = -1;
-		}
-		break;
-
-	case 2:
-		if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
-		    elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) ||
-		    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 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)
-		psmouse_err(psmouse,
-			    "failed to write register 0x%02x with value 0x%02x.\n",
-			    reg, val);
-
-	return rc;
-}
-
-/*
- * Dump a complete mouse movement packet to the syslog
- */
-static void elantech_packet_dump(struct psmouse *psmouse)
-{
-	int	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");
-}
-
-/*
- * Interpret complete data packets and report absolute mode input events for
- * hardware version 1. (4 byte packets)
- */
-static void elantech_report_absolute_v1(struct psmouse *psmouse)
-{
-	struct input_dev *dev = psmouse->dev;
-	struct elantech_data *etd = psmouse->private;
-	unsigned char *packet = psmouse->packet;
-	int fingers;
-
-	if (etd->fw_version < 0x020000) {
-		/*
-		 * byte 0:  D   U  p1  p2   1  p3   R   L
-		 * byte 1:  f   0  th  tw  x9  x8  y9  y8
-		 */
-		fingers = ((packet[1] & 0x80) >> 7) +
-				((packet[1] & 0x30) >> 4);
-	} else {
-		/*
-		 * byte 0: n1  n0  p2  p1   1  p3   R   L
-		 * byte 1:  0   0   0   0  x9  x8  y9  y8
-		 */
-		fingers = (packet[0] & 0xc0) >> 6;
-	}
-
-	if (etd->jumpy_cursor) {
-		if (fingers != 1) {
-			etd->single_finger_reports = 0;
-		} else if (etd->single_finger_reports < 2) {
-			/* Discard first 2 reports of one finger, bogus */
-			etd->single_finger_reports++;
-			elantech_debug("discarding packet\n");
-			return;
-		}
-	}
-
-	input_report_key(dev, BTN_TOUCH, fingers != 0);
-
-	/*
-	 * byte 2: x7  x6  x5  x4  x3  x2  x1  x0
-	 * byte 3: y7  y6  y5  y4  y3  y2  y1  y0
-	 */
-	if (fingers) {
-		input_report_abs(dev, ABS_X,
-			((packet[1] & 0x0c) << 6) | packet[2]);
-		input_report_abs(dev, ABS_Y,
-			etd->y_max - (((packet[1] & 0x03) << 8) | packet[3]));
-	}
-
-	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);
-
-	if (etd->fw_version < 0x020000 &&
-	    (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
-		/* rocker up */
-		input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
-		/* rocker down */
-		input_report_key(dev, BTN_BACK, packet[0] & 0x80);
-	}
-
-	input_sync(dev);
-}
-
-static void elantech_set_slot(struct input_dev *dev, int slot, bool active,
-			      unsigned int x, unsigned int y)
-{
-	input_mt_slot(dev, 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, y);
-	}
-}
-
-/* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */
-static void elantech_report_semi_mt_data(struct input_dev *dev,
-					 unsigned int num_fingers,
-					 unsigned int x1, unsigned int y1,
-					 unsigned int x2, unsigned int y2)
-{
-	elantech_set_slot(dev, 0, num_fingers != 0, x1, y1);
-	elantech_set_slot(dev, 1, num_fingers == 2, x2, y2);
-}
-
-/*
- * Interpret complete data packets and report absolute mode input events for
- * hardware version 2. (6 byte packets)
- */
-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;
-	unsigned int width = 0, pres = 0;
-
-	/* byte 0: n1  n0   .   .   .   .   R   L */
-	fingers = (packet[0] & 0xc0) >> 6;
-
-	switch (fingers) {
-	case 3:
-		/*
-		 * Same as one finger, except report of more than 3 fingers:
-		 * byte 3:  n4  .   w1  w0   .   .   .   .
-		 */
-		if (packet[3] & 0x80)
-			fingers = 4;
-		/* pass through... */
-	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]);
-
-		pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
-		width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
-		break;
-
-	case 2:
-		/*
-		 * The coordinate of each finger is reported separately
-		 * with a lower resolution for two finger touches:
-		 * byte 0:  .   .  ay8 ax8  .   .   .   .
-		 * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
-		 */
-		x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2;
-		/* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
-		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]) << 2;
-		/* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
-		y2 = etd->y_max -
-			((((packet[3] & 0x20) << 3) | packet[5]) << 2);
-
-		/* Unknown so just report sensible values */
-		pres = 127;
-		width = 7;
-		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);
-	input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
-	input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4);
-	input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
-	input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
-	if (etd->reports_pressure) {
-		input_report_abs(dev, ABS_PRESSURE, pres);
-		input_report_abs(dev, ABS_TOOL_WIDTH, width);
-	}
-
-	input_sync(dev);
-}
-
-/*
- * 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_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;
-	unsigned char p1, p2, p3;
-
-	/* Parity bits are placed differently */
-	if (etd->fw_version < 0x020000) {
-		/* byte 0:  D   U  p1  p2   1  p3   R   L */
-		p1 = (packet[0] & 0x20) >> 5;
-		p2 = (packet[0] & 0x10) >> 4;
-	} else {
-		/* byte 0: n1  n0  p2  p1   1  p3   R   L */
-		p1 = (packet[0] & 0x10) >> 4;
-		p2 = (packet[0] & 0x20) >> 5;
-	}
-
-	p3 = (packet[0] & 0x04) >> 2;
-
-	return etd->parity[packet[1]] == p1 &&
-	       etd->parity[packet[2]] == p2 &&
-	       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);
-
-	switch (etd->hw_version) {
-	case 1:
-		if (etd->paritycheck && !elantech_packet_check_v1(psmouse))
-			return PSMOUSE_BAD_DATA;
-
-		elantech_report_absolute_v1(psmouse);
-		break;
-
-	case 2:
-		/* 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;
-}
-
-/*
- * Put the touchpad into absolute mode
- */
-static int elantech_set_absolute_mode(struct psmouse *psmouse)
-{
-	struct elantech_data *etd = psmouse->private;
-	unsigned char val;
-	int tries = ETP_READ_BACK_TRIES;
-	int rc = 0;
-
-	switch (etd->hw_version) {
-	case 1:
-		etd->reg_10 = 0x16;
-		etd->reg_11 = 0x8f;
-		if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
-		    elantech_write_reg(psmouse, 0x11, etd->reg_11)) {
-			rc = -1;
-		}
-		break;
-
-	case 2:
-					/* Windows driver values */
-		etd->reg_10 = 0x54;
-		etd->reg_11 = 0x88;	/* 0x8a */
-		etd->reg_21 = 0x60;	/* 0x00 */
-		if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
-		    elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
-		    elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
-			rc = -1;
-		}
-		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 initializing and not ready until
-		 * we read back the value we just wrote.
-		 */
-		do {
-			rc = elantech_read_reg(psmouse, 0x10, &val);
-			if (rc == 0)
-				break;
-			tries--;
-			elantech_debug("retrying read (%d).\n", tries);
-			msleep(ETP_READ_BACK_DELAY);
-		} while (tries > 0);
-
-		if (rc) {
-			psmouse_err(psmouse,
-				    "failed to read back register 0x10.\n");
-		} else if (etd->hw_version == 1 &&
-			   !(val & ETP_R10_ABSOLUTE_MODE)) {
-			psmouse_err(psmouse,
-				    "touchpad refuses to switch to absolute mode.\n");
-			rc = -1;
-		}
-	}
-
- skip_readback_reg_10:
-	if (rc)
-		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 (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
-				return -1;
-
-			fixed_dpi = param[1] & 0x10;
-
-			if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) {
-				if (etd->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 (etd->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 (etd->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;
-}
-
-/*
- * (value from firmware) * 10 + 790 = dpi
- * we also have to convert dpi to dots/mm (*10/254 to avoid floating point)
- */
-static unsigned int elantech_convert_res(unsigned int val)
-{
-	return (val * 10 + 790) * 10 / 254;
-}
-
-static int elantech_get_resolution_v4(struct psmouse *psmouse,
-				      unsigned int *x_res,
-				      unsigned int *y_res)
-{
-	unsigned char param[3];
-
-	if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param))
-		return -1;
-
-	*x_res = elantech_convert_res(param[1] & 0x0f);
-	*y_res = elantech_convert_res((param[1] & 0xf0) >> 4);
-
-	return 0;
-}
-
-/*
- * Set the appropriate event bits for the input subsystem
- */
-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;
-	unsigned int x_res = 0, y_res = 0;
-
-	if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
-		return -1;
-
-	__set_bit(INPUT_PROP_POINTER, dev->propbit);
-	__set_bit(EV_KEY, dev->evbit);
-	__set_bit(EV_ABS, dev->evbit);
-	__clear_bit(EV_REL, dev->evbit);
-
-	__set_bit(BTN_LEFT, dev->keybit);
-	__set_bit(BTN_RIGHT, dev->keybit);
-
-	__set_bit(BTN_TOUCH, dev->keybit);
-	__set_bit(BTN_TOOL_FINGER, dev->keybit);
-	__set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
-	__set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
-
-	switch (etd->hw_version) {
-	case 1:
-		/* Rocker button */
-		if (etd->fw_version < 0x020000 &&
-		    (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, 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);
-		__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);
-		}
-		input_mt_init_slots(dev, 2);
-		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:
-		if (elantech_get_resolution_v4(psmouse, &x_res, &y_res)) {
-			/*
-			 * if query failed, print a warning and leave the values
-			 * zero to resemble synaptics.c behavior.
-			 */
-			psmouse_warn(psmouse, "couldn't query resolution data.\n");
-		}
-		/* v4 is clickpad, with only one button. */
-		__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
-		__clear_bit(BTN_RIGHT, dev->keybit);
-		__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);
-		input_abs_set_res(dev, ABS_X, x_res);
-		input_abs_set_res(dev, ABS_Y, y_res);
-		/*
-		 * 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_abs_set_res(dev, ABS_MT_POSITION_X, x_res);
-		input_abs_set_res(dev, ABS_MT_POSITION_Y, y_res);
-		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 {
-	size_t		field_offset;
-	unsigned char	reg;
-};
-
-/*
- * Display a register value by reading a sysfs entry
- */
-static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data,
-					char *buf)
-{
-	struct elantech_data *etd = psmouse->private;
-	struct elantech_attr_data *attr = data;
-	unsigned char *reg = (unsigned char *) etd + attr->field_offset;
-	int rc = 0;
-
-	if (attr->reg)
-		rc = elantech_read_reg(psmouse, attr->reg, reg);
-
-	return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg);
-}
-
-/*
- * Write a register value by writing a sysfs entry
- */
-static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
-				     void *data, const char *buf, size_t count)
-{
-	struct elantech_data *etd = psmouse->private;
-	struct elantech_attr_data *attr = data;
-	unsigned char *reg = (unsigned char *) etd + attr->field_offset;
-	unsigned char value;
-	int err;
-
-	err = kstrtou8(buf, 16, &value);
-	if (err)
-		return err;
-
-	/* Do we need to preserve some bits for version 2 hardware too? */
-	if (etd->hw_version == 1) {
-		if (attr->reg == 0x10)
-			/* Force absolute mode always on */
-			value |= ETP_R10_ABSOLUTE_MODE;
-		else if (attr->reg == 0x11)
-			/* Force 4 byte mode always on */
-			value |= ETP_R11_4_BYTE_MODE;
-	}
-
-	if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0)
-		*reg = value;
-
-	return count;
-}
-
-#define ELANTECH_INT_ATTR(_name, _register)				\
-	static struct elantech_attr_data elantech_attr_##_name = {	\
-		.field_offset = offsetof(struct elantech_data, _name),	\
-		.reg = _register,					\
-	};								\
-	PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO,			\
-			    &elantech_attr_##_name,			\
-			    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);
-ELANTECH_INT_ATTR(reg_21, 0x21);
-ELANTECH_INT_ATTR(reg_22, 0x22);
-ELANTECH_INT_ATTR(reg_23, 0x23);
-ELANTECH_INT_ATTR(reg_24, 0x24);
-ELANTECH_INT_ATTR(reg_25, 0x25);
-ELANTECH_INT_ATTR(reg_26, 0x26);
-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,
-	&psmouse_attr_reg_21.dattr.attr,
-	&psmouse_attr_reg_22.dattr.attr,
-	&psmouse_attr_reg_23.dattr.attr,
-	&psmouse_attr_reg_24.dattr.attr,
-	&psmouse_attr_reg_25.dattr.attr,
-	&psmouse_attr_reg_26.dattr.attr,
-	&psmouse_attr_debug.dattr.attr,
-	&psmouse_attr_paritycheck.dattr.attr,
-	NULL
-};
-
-static struct attribute_group elantech_attr_group = {
-	.attrs = elantech_attrs,
-};
-
-static bool elantech_is_signature_valid(const unsigned char *param)
-{
-	static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 };
-	int i;
-
-	if (param[0] == 0)
-		return false;
-
-	if (param[1] == 0)
-		return true;
-
-	for (i = 0; i < ARRAY_SIZE(rates); i++)
-		if (param[2] == rates[i])
-			return false;
-
-	return true;
-}
-
-/*
- * Use magic knock to detect Elantech touchpad
- */
-int elantech_detect(struct psmouse *psmouse, bool set_properties)
-{
-	struct ps2dev *ps2dev = &psmouse->ps2dev;
-	unsigned char param[3];
-
-	ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
-
-	if (ps2_command(ps2dev,  NULL, PSMOUSE_CMD_DISABLE) ||
-	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
-	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
-	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
-	    ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
-		psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n");
-		return -1;
-	}
-
-	/*
-	 * 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 && 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;
-	}
-
-	/*
-	 * Query touchpad's firmware version and see if it reports known
-	 * value to avoid mis-detection. Logitech mice are known to respond
-	 * to Elantech magic knock and there might be more.
-	 */
-	if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
-		psmouse_dbg(psmouse, "failed to query firmware version.\n");
-		return -1;
-	}
-
-	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)) {
-		psmouse_dbg(psmouse,
-			    "Probably not a real Elantech touchpad. Aborting.\n");
-		return -1;
-	}
-
-	if (set_properties) {
-		psmouse->vendor = "Elantech";
-		psmouse->name = "Touchpad";
-	}
-
-	return 0;
-}
-
-/*
- * Clean up sysfs entries when disconnecting
- */
-static void elantech_disconnect(struct psmouse *psmouse)
-{
-	sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
-			   &elantech_attr_group);
-	kfree(psmouse->private);
-	psmouse->private = NULL;
-}
-
-/*
- * Put the touchpad back into absolute mode when reconnecting
- */
-static int elantech_reconnect(struct psmouse *psmouse)
-{
-	psmouse_reset(psmouse);
-
-	if (elantech_detect(psmouse, 0))
-		return -1;
-
-	if (elantech_set_absolute_mode(psmouse)) {
-		psmouse_err(psmouse,
-			    "failed to put touchpad back into absolute mode.\n");
-		return -1;
-	}
-
-	return 0;
-}
-
-/*
- * determine hardware version and set some properties according to it.
- */
-static int elantech_set_properties(struct elantech_data *etd)
-{
-	/* This represents the version of IC body. */
-	int ver = (etd->fw_version & 0x0f0000) >> 16;
-
-	/* Early version of Elan touchpads doesn't obey the rule. */
-	if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
-		etd->hw_version = 1;
-	else {
-		switch (ver) {
-		case 2:
-		case 4:
-			etd->hw_version = 2;
-			break;
-		case 5:
-			etd->hw_version = 3;
-			break;
-		case 6:
-			etd->hw_version = 4;
-			break;
-		default:
-			return -1;
-		}
-	}
-
-	/* decide which send_cmd we're gonna use early */
-	etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd :
-					       synaptics_send_cmd;
-
-	/* 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)
-{
-	struct elantech_data *etd;
-	int i, error;
-	unsigned char param[3];
-
-	psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
-	if (!etd)
-		return -ENOMEM;
-
-	psmouse_reset(psmouse);
-
-	etd->parity[0] = 1;
-	for (i = 1; i < 256; i++)
-		etd->parity[i] = etd->parity[i & (i - 1)] ^ 1;
-
-	/*
-	 * Do the version query again so we can store the result
-	 */
-	if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
-		psmouse_err(psmouse, "failed to query firmware version.\n");
-		goto init_fail;
-	}
-	etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2];
-
-	if (elantech_set_properties(etd)) {
-		psmouse_err(psmouse, "unknown hardware version, aborting...\n");
-		goto init_fail;
-	}
-	psmouse_info(psmouse,
-		     "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n",
-		     etd->hw_version, param[0], param[1], param[2]);
-
-	if (etd->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)) {
-		psmouse_err(psmouse,
-			    "failed to put touchpad into absolute mode.\n");
-		goto init_fail;
-	}
-
-	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) {
-		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 > 1 ? 6 : 4;
-
-	return 0;
-
- init_fail:
-	kfree(etd);
-	return -1;
-}