Input: usbtouchscreen - add support for GoTop tablet devices

Add support for GoTop Super_Q2/GogoPen/PenPower tablets to usbtouchscreen.
Protocol discovery was done by Yick Yan Lam.
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/touchscreen/Kconfig

@@ -202,6 +202,7 @@ config TOUCHSCREEN_USB_COMPOSITE
 	  - DMC TSC-10/25
 	  - IRTOUCHSYSTEMS/UNITOP
 	  - IdealTEK URTC1000
+	  - GoTop Super_Q2/GogoPen/PenPower tablets
 
 	  Have a look at <http://linux.chapter7.ch/touchkit/> for
 	  a usage description and the required user-space stuff.
@@ -259,4 +260,9 @@ config TOUCHSCREEN_USB_GENERAL_TOUCH
 	bool "GeneralTouch Touchscreen device support" if EMBEDDED
 	depends on TOUCHSCREEN_USB_COMPOSITE
 
+config TOUCHSCREEN_USB_GOTOP
+	default y
+	bool "GoTop Super_Q2/GogoPen/PenPower tablet device support" if EMBEDDED
+	depends on TOUCHSCREEN_USB_COMPOSITE
+
 endif

drivers/input/touchscreen/usbtouchscreen.c

@@ -11,8 +11,9 @@
  *  - DMC TSC-10/25
  *  - IRTOUCHSYSTEMS/UNITOP
  *  - IdealTEK URTC1000
+ *  - GoTop Super_Q2/GogoPen/PenPower tablets
  *
- * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch>
+ * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  *
  * This program is free software; you can redistribute it and/or
@@ -115,6 +116,7 @@ enum {
 	DEVTYPE_IRTOUCH,
 	DEVTYPE_IDEALTEK,
 	DEVTYPE_GENERAL_TOUCH,
+	DEVTYPE_GOTOP,
 };
 
 static struct usb_device_id usbtouch_devices[] = {
@@ -168,6 +170,12 @@ static struct usb_device_id usbtouch_devices[] = {
 	{USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 #endif
 
+#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
+	{USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
+	{USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
+	{USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
+#endif
+
 	{}
 };
 
@@ -500,6 +508,20 @@ static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 }
 #endif
 
+/*****************************************************************************
+ * GoTop Part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
+static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
+	dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
+	dev->touch = pkt[0] & 0x01;
+	return 1;
+}
+#endif
+
+
 /*****************************************************************************
  * the different device descriptors
  */
@@ -623,9 +645,19 @@ static struct usbtouch_device_info usbtouch_dev_info[] = {
 		.max_yc		= 0x0500,
 		.rept_size	= 7,
 		.read_data	= general_touch_read_data,
-	}
+	},
 #endif
 
+#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
+	[DEVTYPE_GOTOP] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x03ff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x03ff,
+		.rept_size	= 4,
+		.read_data	= gotop_read_data,
+	},
+#endif
 };