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>

2 files changed, 40 insertions, 2 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index e3e0baa1a158..fa8442b6241c 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/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
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 9fb3d5c30999..f7d4a3b1ee7b 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/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
+
         {}
 };
 
@@ -501,6 +509,20 @@ 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
  */
 static struct usbtouch_device_info usbtouch_dev_info[] = {
@@ -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
 };