Input: usbtouchscreen - add support for IRTOUCHSYSTEMS touchscreens

This patch adds support for IRTOUCHSYSTEMS (or UNITOP) infrared touchscreens.

The touchscreen sends data in 8-byte packets.
BYTE 0 - unknown meaning, seen only one value: 0x54
BYTE 1 - unknown meaning, 3 lowest bits indicate touch state
        values seen: 0x81, 0x82 or 0x83
        bit 0 = set if the screen is touched and was not touched before (touch
        bit 1 = set if the screen is touched and was touched (dragging)
        bit 2 = set if the touch was ended (release)
BYTES 2 and 3 - X position, high-order-byte first, range = 0 to 0x0FFF
BYTES 4 and 5 - Y position, high-order-byte first, range = 0 to 0x0FFF
BYTE 6 - unknown meaning, seen only one value: 0xFF
BYTE 7 - unknown meaning, seen only one value: 0x00

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index e5cca9bd0406..69371779806a 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -177,6 +177,7 @@ config TOUCHSCREEN_USB_COMPOSITE
           - some other eTurboTouch
           - Gunze AHL61
           - DMC TSC-10/25
+          - IRTOUCHSYSTEMS/UNITOP
 
           Have a look at <http://linux.chapter7.ch/touchkit/> for
           a usage description and the required user-space stuff.
@@ -219,4 +220,9 @@ config TOUCHSCREEN_USB_DMC_TSC10
         bool "DMC TSC-10/25 device support" if EMBEDDED
         depends on TOUCHSCREEN_USB_COMPOSITE
 
+config TOUCHSCREEN_USB_IRTOUCH
+        default y
+        bool "IRTOUCHSYSTEMS/UNITOP device support" if EMBEDDED
+        depends on TOUCHSCREEN_USB_COMPOSITE
+
 endif