Input: wacom - add support for new LCD tablets

This adds support for the foolowing Wacom devices:

 - 0x9F - a single touch only LCD tablet;
 - 0xE2 - a two finger touch only LCD tablet;
 - 0xE3 -  a two finger touch, penabled LCD tablet.
Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/tablet/wacom.h

@@ -71,6 +71,7 @@
  *      v1.51 (pc) - Added support for Intuos4
  *      v1.52 (pc) - Query Wacom data upon system resume
  *                 - add defines for features->type
+ *                 - add new devices (0x9F, 0xE2, and 0XE3)
  */
 
 /*
@@ -135,6 +136,8 @@ extern void input_dev_i4s(struct input_dev *input_dev, struct wacom_wac *wacom_w
 extern void input_dev_i4(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern void input_dev_pl(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
+extern void input_dev_tpc(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
+extern void input_dev_tpc2fg(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern void input_dev_mo(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern void input_dev_bee(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern __u16 wacom_le16_to_cpu(unsigned char *data);

drivers/input/tablet/wacom_wac.h

@@ -19,7 +19,9 @@
 #define WACOM_PKGLEN_INTUOS 	10
 #define WACOM_PKGLEN_PENABLED	 8
 #define WACOM_PKGLEN_TPC1FG	 5
+#define WACOM_PKGLEN_TPC2FG 	14
 
+/* device IDs */
 #define STYLUS_DEVICE_ID	0x02
 #define TOUCH_DEVICE_ID		0x03
 #define CURSOR_DEVICE_ID	0x06
@@ -43,6 +45,7 @@ enum {
 	WACOM_BEE,
 	WACOM_MO,
 	TABLETPC,
+	TABLETPC2FG,
 	MAX_TYPE
 };
 
@@ -54,8 +57,11 @@ struct wacom_features {
 	int pressure_max;
 	int distance_max;
 	int type;
-	int touch_x_max;
-	int touch_y_max;
+	int device_type;
+	int x_phy;
+	int y_phy;
+	unsigned char unit;
+	unsigned char unitExpo;
 };
 
 struct wacom_wac {