1 files changed, 700 insertions, 0 deletions

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
new file mode 100644
index 000000000000..69832f8fb720
--- /dev/null
+++ b/drivers/input/mouse/synaptics.c
@@ -0,0 +1,700 @@
+/*
+ * Synaptics TouchPad PS/2 mouse driver
+ *
+ *   2003 Dmitry Torokhov <dtor@mail.ru>
+ *     Added support for pass-through port. Special thanks to Peter Berg Larsen
+ *     for explaining various Synaptics quirks.
+ *
+ *   2003 Peter Osterlund <petero2@telia.com>
+ *     Ported to 2.5 input device infrastructure.
+ *
+ *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
+ *     start merging tpconfig and gpm code to a xfree-input module
+ *     adding some changes and extensions (ex. 3rd and 4th button)
+ *
+ *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
+ *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
+ *     code for the special synaptics commands (from the tpconfig-source)
+ *
+ * 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/module.h>
+#include <linux/input.h>
+#include <linux/serio.h>
+#include <linux/libps2.h>
+#include "psmouse.h"
+#include "synaptics.h"
+
+/*
+ * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
+ * section 2.3.2, which says that they should be valid regardless of the
+ * actual size of the sensor.
+ */
+#define XMIN_NOMINAL 1472
+#define XMAX_NOMINAL 5472
+#define YMIN_NOMINAL 1408
+#define YMAX_NOMINAL 4448
+
+/*****************************************************************************
+ *	Synaptics communications functions
+ ****************************************************************************/
+
+/*
+ * Send a command to the synpatics touchpad by special commands
+ */
+static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
+{
+	if (psmouse_sliced_command(psmouse, c))
+		return -1;
+	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
+		return -1;
+	return 0;
+}
+
+/*
+ * Set the synaptics touchpad mode byte by special commands
+ */
+static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
+{
+	unsigned char param[1];
+
+	if (psmouse_sliced_command(psmouse, mode))
+		return -1;
+	param[0] = SYN_PS_SET_MODE2;
+	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
+		return -1;
+	return 0;
+}
+
+/*
+ * Read the model-id bytes from the touchpad
+ * see also SYN_MODEL_* macros
+ */
+static int synaptics_model_id(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+	unsigned char mi[3];
+
+	if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
+		return -1;
+	priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
+	return 0;
+}
+
+/*
+ * Read the capability-bits from the touchpad
+ * see also the SYN_CAP_* macros
+ */
+static int synaptics_capability(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+	unsigned char cap[3];
+
+	if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
+		return -1;
+	priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
+	priv->ext_cap = 0;
+	if (!SYN_CAP_VALID(priv->capabilities))
+		return -1;
+
+	/*
+	 * Unless capExtended is set the rest of the flags should be ignored
+	 */
+	if (!SYN_CAP_EXTENDED(priv->capabilities))
+		priv->capabilities = 0;
+
+	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.");
+		} else {
+			priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
+
+			/*
+			 * if nExtBtn is greater than 8 it should be considered
+			 * invalid and treated as 0
+			 */
+			if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
+				priv->ext_cap &= 0xff0fff;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Identify Touchpad
+ * See also the SYN_ID_* macros
+ */
+static int synaptics_identify(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+	unsigned char id[3];
+
+	if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
+		return -1;
+	priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
+	if (SYN_ID_IS_SYNAPTICS(priv->identity))
+		return 0;
+	return -1;
+}
+
+static void print_ident(struct synaptics_data *priv)
+{
+	printk(KERN_INFO "Synaptics Touchpad, model: %ld\n", SYN_ID_MODEL(priv->identity));
+	printk(KERN_INFO " Firmware: %ld.%ld\n", SYN_ID_MAJOR(priv->identity),
+	       SYN_ID_MINOR(priv->identity));
+	if (SYN_MODEL_ROT180(priv->model_id))
+		printk(KERN_INFO " 180 degree mounted touchpad\n");
+	if (SYN_MODEL_PORTRAIT(priv->model_id))
+		printk(KERN_INFO " portrait touchpad\n");
+	printk(KERN_INFO " Sensor: %ld\n", SYN_MODEL_SENSOR(priv->model_id));
+	if (SYN_MODEL_NEWABS(priv->model_id))
+		printk(KERN_INFO " new absolute packet format\n");
+	if (SYN_MODEL_PEN(priv->model_id))
+		printk(KERN_INFO " pen detection\n");
+
+	if (SYN_CAP_EXTENDED(priv->capabilities)) {
+		printk(KERN_INFO " Touchpad has extended capability bits\n");
+		if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
+			printk(KERN_INFO " -> %d multi-buttons, i.e. besides standard buttons\n",
+			       (int)(SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap)));
+		if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
+			printk(KERN_INFO " -> middle button\n");
+		if (SYN_CAP_FOUR_BUTTON(priv->capabilities))
+			printk(KERN_INFO " -> four buttons\n");
+		if (SYN_CAP_MULTIFINGER(priv->capabilities))
+			printk(KERN_INFO " -> multifinger detection\n");
+		if (SYN_CAP_PALMDETECT(priv->capabilities))
+			printk(KERN_INFO " -> palm detection\n");
+		if (SYN_CAP_PASS_THROUGH(priv->capabilities))
+			printk(KERN_INFO " -> pass-through port\n");
+	}
+}
+
+static int synaptics_query_hardware(struct psmouse *psmouse)
+{
+	int retries = 0;
+
+	while ((retries++ < 3) && psmouse_reset(psmouse))
+		printk(KERN_ERR "synaptics reset failed\n");
+
+	if (synaptics_identify(psmouse))
+		return -1;
+	if (synaptics_model_id(psmouse))
+		return -1;
+	if (synaptics_capability(psmouse))
+		return -1;
+
+	return 0;
+}
+
+static int synaptics_set_absolute_mode(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+
+	priv->mode = SYN_BIT_ABSOLUTE_MODE;
+	if (SYN_ID_MAJOR(priv->identity) >= 4)
+		priv->mode |= SYN_BIT_DISABLE_GESTURE;
+	if (SYN_CAP_EXTENDED(priv->capabilities))
+		priv->mode |= SYN_BIT_W_MODE;
+
+	if (synaptics_mode_cmd(psmouse, priv->mode))
+		return -1;
+
+	return 0;
+}
+
+static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
+{
+	struct synaptics_data *priv = psmouse->private;
+
+	if (rate >= 80) {
+		priv->mode |= SYN_BIT_HIGH_RATE;
+		psmouse->rate = 80;
+	} else {
+		priv->mode &= ~SYN_BIT_HIGH_RATE;
+		psmouse->rate = 40;
+	}
+
+	synaptics_mode_cmd(psmouse, priv->mode);
+}
+
+/*****************************************************************************
+ *	Synaptics pass-through PS/2 port support
+ ****************************************************************************/
+static int synaptics_pt_write(struct serio *serio, unsigned char c)
+{
+	struct psmouse *parent = serio_get_drvdata(serio->parent);
+	char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
+
+	if (psmouse_sliced_command(parent, c))
+		return -1;
+	if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
+		return -1;
+	return 0;
+}
+
+static inline int synaptics_is_pt_packet(unsigned char *buf)
+{
+	return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
+}
+
+static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
+{
+	struct psmouse *child = serio_get_drvdata(ptport);
+
+	if (child && child->state == PSMOUSE_ACTIVATED) {
+		serio_interrupt(ptport, packet[1], 0, NULL);
+		serio_interrupt(ptport, packet[4], 0, NULL);
+		serio_interrupt(ptport, packet[5], 0, NULL);
+		if (child->type >= PSMOUSE_GENPS)
+			serio_interrupt(ptport, packet[2], 0, NULL);
+	} else
+		serio_interrupt(ptport, packet[1], 0, NULL);
+}
+
+static void synaptics_pt_activate(struct psmouse *psmouse)
+{
+	struct serio *ptport = psmouse->ps2dev.serio->child;
+	struct psmouse *child = serio_get_drvdata(ptport);
+	struct synaptics_data *priv = psmouse->private;
+
+	/* adjust the touchpad to child's choice of protocol */
+	if (child) {
+		if (child->type >= PSMOUSE_GENPS)
+			priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
+		else
+			priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
+
+		if (synaptics_mode_cmd(psmouse, priv->mode))
+			printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
+	}
+}
+
+static void synaptics_pt_create(struct psmouse *psmouse)
+{
+	struct serio *serio;
+
+	serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
+	if (!serio) {
+		printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
+		return;
+	}
+
+	memset(serio, 0, sizeof(struct serio));
+
+	serio->id.type = SERIO_PS_PSTHRU;
+	strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
+	strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
+	serio->write = synaptics_pt_write;
+	serio->parent = psmouse->ps2dev.serio;
+
+	psmouse->pt_activate = synaptics_pt_activate;
+
+	printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
+	serio_register_port(serio);
+}
+
+/*****************************************************************************
+ *	Functions to interpret the absolute mode packets
+ ****************************************************************************/
+
+static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
+{
+	memset(hw, 0, sizeof(struct synaptics_hw_state));
+
+	if (SYN_MODEL_NEWABS(priv->model_id)) {
+		hw->x = (((buf[3] & 0x10) << 8) |
+			 ((buf[1] & 0x0f) << 8) |
+			 buf[4]);
+		hw->y = (((buf[3] & 0x20) << 7) |
+			 ((buf[1] & 0xf0) << 4) |
+			 buf[5]);
+
+		hw->z = buf[2];
+		hw->w = (((buf[0] & 0x30) >> 2) |
+			 ((buf[0] & 0x04) >> 1) |
+			 ((buf[3] & 0x04) >> 2));
+
+		hw->left  = (buf[0] & 0x01) ? 1 : 0;
+		hw->right = (buf[0] & 0x02) ? 1 : 0;
+
+		if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
+			hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
+			if (hw->w == 2)
+				hw->scroll = (signed char)(buf[1]);
+		}
+
+		if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
+			hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
+			hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
+		}
+
+		if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
+		    ((buf[0] ^ buf[3]) & 0x02)) {
+			switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
+			default:
+				/*
+				 * if nExtBtn is greater than 8 it should be
+				 * considered invalid and treated as 0
+				 */
+				break;
+			case 8:
+				hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
+				hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
+			case 6:
+				hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
+				hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
+			case 4:
+				hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
+				hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
+			case 2:
+				hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
+				hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
+			}
+		}
+	} else {
+		hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
+		hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
+
+		hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
+		hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
+
+		hw->left  = (buf[0] & 0x01) ? 1 : 0;
+		hw->right = (buf[0] & 0x02) ? 1 : 0;
+	}
+}
+
+/*
+ *  called for each full received packet from the touchpad
+ */
+static void synaptics_process_packet(struct psmouse *psmouse)
+{
+	struct input_dev *dev = &psmouse->dev;
+	struct synaptics_data *priv = psmouse->private;
+	struct synaptics_hw_state hw;
+	int num_fingers;
+	int finger_width;
+	int i;
+
+	synaptics_parse_hw_state(psmouse->packet, priv, &hw);
+
+	if (hw.scroll) {
+		priv->scroll += hw.scroll;
+
+		while (priv->scroll >= 4) {
+			input_report_key(dev, BTN_BACK, !hw.down);
+			input_sync(dev);
+			input_report_key(dev, BTN_BACK, hw.down);
+			input_sync(dev);
+			priv->scroll -= 4;
+		}
+		while (priv->scroll <= -4) {
+			input_report_key(dev, BTN_FORWARD, !hw.up);
+			input_sync(dev);
+			input_report_key(dev, BTN_FORWARD, hw.up);
+			input_sync(dev);
+			priv->scroll += 4;
+		}
+		return;
+	}
+
+	if (hw.z > 0) {
+		num_fingers = 1;
+		finger_width = 5;
+		if (SYN_CAP_EXTENDED(priv->capabilities)) {
+			switch (hw.w) {
+			case 0 ... 1:
+				if (SYN_CAP_MULTIFINGER(priv->capabilities))
+					num_fingers = hw.w + 2;
+				break;
+			case 2:
+				if (SYN_MODEL_PEN(priv->model_id))
+					;   /* Nothing, treat a pen as a single finger */
+				break;
+			case 4 ... 15:
+				if (SYN_CAP_PALMDETECT(priv->capabilities))
+					finger_width = hw.w;
+				break;
+			}
+		}
+	} else {
+		num_fingers = 0;
+		finger_width = 0;
+	}
+
+	/* Post events
+	 * BTN_TOUCH has to be first as mousedev relies on it when doing
+	 * absolute -> relative conversion
+	 */
+	if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
+	if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
+
+	if (hw.z > 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_PRESSURE, hw.z);
+
+	input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
+	input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
+	input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
+	input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
+
+	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));
+
+	input_sync(dev);
+}
+
+static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
+{
+	static unsigned char newabs_mask[]	= { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
+	static unsigned char newabs_rel_mask[]	= { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
+	static unsigned char newabs_rslt[]	= { 0x80, 0x00, 0x00, 0xC0, 0x00 };
+	static unsigned char oldabs_mask[]	= { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
+	static unsigned char oldabs_rslt[]	= { 0xC0, 0x00, 0x00, 0x80, 0x00 };
+
+	if (idx < 0 || idx > 4)
+		return 0;
+
+	switch (pkt_type) {
+		case SYN_NEWABS:
+		case SYN_NEWABS_RELAXED:
+			return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
+
+		case SYN_NEWABS_STRICT:
+			return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
+
+		case SYN_OLDABS:
+			return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
+
+		default:
+			printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
+			return 0;
+	}
+}
+
+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");
+			return SYN_NEWABS_RELAXED;
+		}
+
+	return SYN_NEWABS_STRICT;
+}
+
+static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
+{
+	struct input_dev *dev = &psmouse->dev;
+	struct synaptics_data *priv = psmouse->private;
+
+	input_regs(dev, regs);
+
+	if (psmouse->pktcnt >= 6) { /* Full packet received */
+		if (unlikely(priv->pkt_type == SYN_NEWABS))
+			priv->pkt_type = synaptics_detect_pkt_type(psmouse);
+
+		if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
+			if (psmouse->ps2dev.serio->child)
+				synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
+		} else
+			synaptics_process_packet(psmouse);
+
+		return PSMOUSE_FULL_PACKET;
+	}
+
+	return synaptics_validate_byte(psmouse->packet, 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)
+{
+	int i;
+
+	set_bit(EV_ABS, dev->evbit);
+	input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
+	input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
+	input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
+	set_bit(ABS_TOOL_WIDTH, dev->absbit);
+
+	set_bit(EV_KEY, dev->evbit);
+	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);
+
+	set_bit(BTN_LEFT, dev->keybit);
+	set_bit(BTN_RIGHT, dev->keybit);
+
+	if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
+		set_bit(BTN_MIDDLE, dev->keybit);
+
+	if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
+	    SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
+		set_bit(BTN_FORWARD, dev->keybit);
+		set_bit(BTN_BACK, dev->keybit);
+	}
+
+	for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
+		set_bit(BTN_0 + i, dev->keybit);
+
+	clear_bit(EV_REL, dev->evbit);
+	clear_bit(REL_X, dev->relbit);
+	clear_bit(REL_Y, dev->relbit);
+}
+
+void synaptics_reset(struct psmouse *psmouse)
+{
+	/* reset touchpad back to relative mode, gestures enabled */
+	synaptics_mode_cmd(psmouse, 0);
+}
+
+static void synaptics_disconnect(struct psmouse *psmouse)
+{
+	synaptics_reset(psmouse);
+	kfree(psmouse->private);
+	psmouse->private = NULL;
+}
+
+static int synaptics_reconnect(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+	struct synaptics_data old_priv = *priv;
+
+	if (synaptics_detect(psmouse, 0))
+		return -1;
+
+	if (synaptics_query_hardware(psmouse)) {
+		printk(KERN_ERR "Unable to query Synaptics hardware.\n");
+		return -1;
+	}
+
+	if (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;
+
+	if (synaptics_set_absolute_mode(psmouse)) {
+		printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+int synaptics_detect(struct psmouse *psmouse, int set_properties)
+{
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	unsigned char param[4];
+
+	param[0] = 0;
+
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+	ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
+
+	if (param[1] != 0x47)
+		return -1;
+
+	if (set_properties) {
+		psmouse->vendor = "Synaptics";
+		psmouse->name = "TouchPad";
+	}
+
+	return 0;
+}
+
+#if defined(__i386__)
+#include <linux/dmi.h>
+static struct dmi_system_id toshiba_dmi_table[] = {
+	{
+		.ident = "Toshiba Satellite",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME , "Satellite"),
+		},
+	},
+	{ }
+};
+#endif
+
+int synaptics_init(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv;
+
+	psmouse->private = priv = kmalloc(sizeof(struct synaptics_data), GFP_KERNEL);
+	if (!priv)
+		return -1;
+	memset(priv, 0, sizeof(struct synaptics_data));
+
+	if (synaptics_query_hardware(psmouse)) {
+		printk(KERN_ERR "Unable to query Synaptics hardware.\n");
+		goto init_fail;
+	}
+
+	if (synaptics_set_absolute_mode(psmouse)) {
+		printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
+		goto init_fail;
+	}
+
+	priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
+
+	print_ident(priv);
+	set_input_params(&psmouse->dev, priv);
+
+	psmouse->protocol_handler = synaptics_process_byte;
+	psmouse->set_rate = synaptics_set_rate;
+	psmouse->disconnect = synaptics_disconnect;
+	psmouse->reconnect = synaptics_reconnect;
+	psmouse->pktsize = 6;
+
+	if (SYN_CAP_PASS_THROUGH(priv->capabilities))
+		synaptics_pt_create(psmouse);
+
+#if defined(__i386__)
+	/*
+	 * Toshiba's KBC seems to have trouble handling data from
+	 * Synaptics as full rate, switch to lower rate which is roughly
+	 * thye same as rate of standard PS/2 mouse.
+	 */
+	if (psmouse->rate >= 80 && dmi_check_system(toshiba_dmi_table)) {
+		printk(KERN_INFO "synaptics: Toshiba Satellite detected, limiting rate to 40pps.\n");
+		psmouse->rate = 40;
+	}
+#endif
+
+	return 0;
+
+ init_fail:
+	kfree(priv);
+	return -1;
+}
+
+