--- linux-2.6.32-orig/drivers/input/mouse/alps.c	2010-11-23 14:07:11.000000000 +0100
+++ linux-2.6.32/drivers/input/mouse/alps.c	2010-11-23 14:01:34.000000000 +0100
@@ -61,6 +61,8 @@ static const struct alps_model_info alps
 	/* Dell Latitude E5500, E6400, E6500, Precision M4400 */
 	{ { 0x62, 0x02, 0x14 }, 0xcf, 0xcf,
 		ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
+	/* Dell Precision 4500 */
+	{ { 0x73, 0x02, 0x64 }, 0x80, 0x80, 0 },
 	{ { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FW_BK_1 },		  /* Dell Vostro 1400 */
 	{ { 0x52, 0x01, 0x14 }, 0xff, 0xff,
 		ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },	  /* Toshiba Tecra A11-11L */
@@ -109,6 +111,33 @@ static const struct alps_model_info alps
  * on a dualpoint, etc.
  */
 
+
+static int dell_e2_setup_intellimouse_mode(void *data);
+
+static struct alps_model_quirk alps_model_init_quirk_tbl[] = {
+
+	{ {0x73, 0x02, 0x64}, dell_e2_setup_intellimouse_mode },
+	{}
+};
+
+static int alps_model_init_quirk(struct psmouse *psmouse,
+					const struct alps_model_info *model)
+{
+
+	int rc = 1;
+	struct alps_model_quirk *d = alps_model_init_quirk_tbl;
+
+	for (d = alps_model_init_quirk_tbl; d; d++) {
+		if (!memcmp(model->signature, d->signature,
+			    sizeof(d->signature))) {
+			rc = d->callback(psmouse);
+			break;
+		}
+	}
+
+	return rc;
+}
+
 static bool alps_is_valid_first_byte(const struct alps_model_info *model,
 				     unsigned char data)
 {
@@ -652,11 +681,64 @@ static void alps_disconnect(struct psmou
 	kfree(priv);
 }
 
+/* Magic Sequence to enable Intellimouse Mode on Dell E2 Touchpads*/
+
+static int dell_e2_setup_intellimouse_mode(void *data)
+{
+	struct psmouse *psmouse = (struct psmouse *)(data);
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	struct input_dev *dev = psmouse->dev;
+	unsigned char param[3] = {0, 0, 0};
+
+	if (ps2_command(ps2dev, param, 0x00f5) ||
+		ps2_command(ps2dev, param, 0x00ea) ||
+		ps2_command(ps2dev, param, 0x00ec) ||
+		ps2_command(ps2dev, param, 0x00ec) ||
+		ps2_command(ps2dev, param, 0x00ec) ||
+		ps2_command(ps2dev, param, 0x03e9))
+			return -1;
+
+	dbg("alps:dell_e2_setup: param[0]: %x,"
+		"param[1]: %x, param[2]: %x\n", param[0],
+					param[1], param[2]);
+/* Check for supported model to continue */
+
+	if (!((param[0] == 0x88) && (param[1] == 0x07)
+		&& ((param[2] == 0x9D) || (param[2] == 0x9B))))
+		return -1;
+
+	if (ps2_command(ps2dev, NULL, 0x00ec) ||
+		ps2_command(ps2dev, NULL, 0x00f0) ||
+		ps2_command(ps2dev, NULL, 0x00f0) ||
+		ps2_command(ps2dev, NULL, 0x00f0) ||
+		ps2_command(ps2dev, NULL, 0x00f3) ||
+		ps2_command(ps2dev, NULL, 0x0028) ||
+		ps2_command(ps2dev, NULL, 0x00f0) ||
+		ps2_command(ps2dev, NULL, 0x00f6) ||
+		ps2_command(ps2dev, NULL, 0x00ea) ||
+		ps2_command(ps2dev, NULL, 0x00f4))
+			return -1;
+
+	__set_bit(BTN_MIDDLE, dev->keybit);
+	__set_bit(REL_WHEEL, dev->relbit);
+
+	psmouse->pktsize = 4;
+	psmouse->type = PSMOUSE_IMPS;
+
+	return 0;
+}
+
 int alps_init(struct psmouse *psmouse)
 {
 	struct alps_data *priv;
 	struct input_dev *dev1 = psmouse->dev, *dev2;
 	int version;
+	const struct alps_model_info *model;
+
+	model = alps_get_model(psmouse, &version);
+	
+	if (!model)
+		return -1;
 
 	priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
 	dev2 = input_allocate_device();
@@ -670,7 +752,15 @@ int alps_init(struct psmouse *psmouse)
 
 	if (alps_hw_init(psmouse, &version))
 		goto init_fail;
-
+	
+	if (!alps_model_init_quirk(psmouse, model)) {
+		printk(KERN_WARNING "alps.c: Enabled hardware quirk, falling back to psmouse-core\n");
+		input_free_device(dev2);
+		kfree(priv);
+		psmouse->private = NULL;
+		return 0;
+	}
+	
 	dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
 	dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
 	dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
--- linux-2.6.32-orig/drivers/input/mouse/alps.h	2010-11-23 14:07:11.000000000 +0100
+++ linux-2.6.32/drivers/input/mouse/alps.h	2010-11-22 12:18:19.000000000 +0100
@@ -26,6 +26,11 @@ struct alps_data {
 	struct timer_list timer;
 };
 
+struct alps_model_quirk {
+unsigned char signature[3];
+int (*callback)(void *data);
+};
+
 #ifdef CONFIG_MOUSE_PS2_ALPS
 int alps_detect(struct psmouse *psmouse, bool set_properties);
 int alps_init(struct psmouse *psmouse);
--- linux-2.6.32-orig/drivers/input/mouse/psmouse-base.c	2010-11-23 14:07:11.000000000 +0100
+++ linux-2.6.32/drivers/input/mouse/psmouse-base.c	2010-11-22 12:18:19.000000000 +0100
@@ -633,7 +633,8 @@ static int psmouse_extensions(struct psm
 		ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
 		if (alps_detect(psmouse, set_properties) == 0) {
 			if (!set_properties || alps_init(psmouse) == 0)
-				return PSMOUSE_ALPS;
+	/*If ALPS model quirk was applied, don't change the settings*/
+				return psmouse->type ? psmouse->type : PSMOUSE_ALPS;
 /*
  * Init failed, try basic relative protocols
  */