Touchpad state control psmouse driver patch by rkraevskiy@gmail.com

to check touchpad state: 
    cat /sys/bus/serio/drivers/psmouse/serio1/enabled
    1 -> touchpad is enabled
    0 -> touchpad is disabled

to disable touchpad: 
    echo 0 >/sys/bus/serio/drivers/psmouse/serio1/enabled

to enable touchpad: 
    echo 1 >/sys/bus/serio/drivers/psmouse/serio1/enabled


In /etc/acpi/handler.sh

    button/lid)
        STATE=`cat  /proc/acpi/button/lid/LID/state | cut -c13-`
        case "$STATE" in
            closed)
                echo 0 >/sys/bus/serio/drivers/psmouse/serio1/enabled
                ;;
            open)
                echo 1 >/sys/bus/serio/drivers/psmouse/serio1/enabled
                ;;
        esac
        ;;



diff -ur a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
--- a/drivers/input/mouse/psmouse-base.c	2012-12-11 05:30:57.000000000 +0200
+++ b/drivers/input/mouse/psmouse-base.c	2012-12-21 23:57:06.000000000 +0200
@@ -87,6 +87,9 @@
 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
 			(void *) offsetof(struct psmouse, resync_time),
 			psmouse_show_int_attr, psmouse_set_int_attr);
+PSMOUSE_DEFINE_ATTR(enabled, S_IWUSR | S_IRUGO,
+			NULL,
+			psmouse_attr_show_enabled, psmouse_attr_set_enabled);
 
 static struct attribute *psmouse_attributes[] = {
 	&psmouse_attr_protocol.dattr.attr,
@@ -94,6 +97,7 @@
 	&psmouse_attr_resolution.dattr.attr,
 	&psmouse_attr_resetafter.dattr.attr,
 	&psmouse_attr_resync_time.dattr.attr,
+	&psmouse_attr_enabled.dattr.attr,
 	NULL
 };
 
@@ -1419,7 +1423,7 @@
 	psmouse->resetafter = psmouse_resetafter;
 	psmouse->resync_time = parent ? 0 : psmouse_resync_time;
 	psmouse->smartscroll = psmouse_smartscroll;
-
+	psmouse->enabled = true;
 	psmouse_switch_protocol(psmouse, NULL);
 
 	psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
@@ -1602,7 +1606,7 @@
 	retval = attr->set(psmouse, attr->data, buf, count);
 
 	if (attr->protect) {
-		if (retval != -ENODEV)
+		if (retval != -ENODEV && psmouse->enabled)
 			psmouse_activate(psmouse);
 
 		if (parent)
@@ -1637,6 +1641,26 @@
 	return count;
 }
 
+
+static ssize_t psmouse_attr_show_enabled(struct psmouse *psmouse, void *data, char *buf)
+{
+	return sprintf(buf, "%d\n", psmouse->enabled);
+}
+
+static ssize_t psmouse_attr_set_enabled(struct psmouse *psmouse, void *data, const char *buf, size_t count)
+{
+	unsigned int value;
+	int err;
+
+	err = kstrtouint(buf, 10, &value);
+	if (err){
+		return err;
+	}
+	
+	psmouse->enabled = (value!=0); 
+	return count;
+}
+
 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
 {
 	return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
diff -ur a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h
--- a/drivers/input/mouse/psmouse.h	2012-12-11 05:30:57.000000000 +0200
+++ b/drivers/input/mouse/psmouse.h	2012-12-21 23:53:54.000000000 +0200
@@ -62,6 +62,7 @@
 	unsigned int resolution;
 	unsigned int resetafter;
 	unsigned int resync_time;
+	bool enabled;
 	bool smartscroll;	/* Logitech only */
 
 	psmouse_ret_t (*protocol_handler)(struct psmouse *psmouse);