IRTOUCHSYSTEMS support for usbtouchscreen
PATCH 1/1 IRTOUCHSYSTEMS support for usbtouchscreen
Hello,
this patch adds support for IRTOUCHSYSTEMS (or UNITOP) infrared touchscreens.
The manufacturer (http://www.irtouch.com) provides only closed source drivers for specific kernel versions (looks like GPL violation, btw.) which I haven't even tried (as there's no chance that any of the modules could work with 2.6.22-rc kernel). They also don't provide any protocol specification.
So I made this code (attached) after observing the data stream with usbmon for a while. If someone is interested in my observations, here are the results:
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
Signature · 1 line
Ondrej Zary
drivers/input/touchscreen/Kconfig +6 -0
@@ -177,6 +177,7 @@ - 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 @@ 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
Only in linux-2.6.22-rc6/drivers/input/touchscreen/: built-in.o
drivers/input/touchscreen/usbtouchscreen.c +33 -0
@@ -9,6 +9,7 @@* - eTurboTouch * - Gunze AHL61 * - DMC TSC-10/25 +* - IRTOUCHSYSTEMS/UNITOP * * Copyright (C) 2004-2006 by Daniel Ritz <[email protected]> * Copyright (C) by Todd E. Johnson (mtouchusb.c)
@@ -110,6 +111,7 @@DEVTYPE_ETURBO ,DEVTYPE_GUNZE ,DEVTYPE_DMC_TSC10 , + DEVTYPE_IRTOUCH, }; static struct usb_device_id usbtouch_devices[] = {
@@ -150,6 +152,11 @@ {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10}, #endif +#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH + {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, + {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, +#endif + {} };
@@ -416,6 +423,21 @@/***************************************************************************** +* IRTOUCH Part +*/ +#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH +static int irtouch_read_data (struct usbtouch_usb *dev,unsigned char *pkt) +{ + dev->x = (pkt[3 ] <<8 ) | pkt[2 ]; + dev->y = (pkt[5 ] <<8 ) | pkt[4 ]; + dev->touch = (pkt[1 ] &0x03 ) ?1 :0 ; + +return 1 ; +} +#endif + + +/***************************************************************************** * the different device descriptors */ static struct usbtouch_device_info usbtouch_dev_info[] = {
@@ -504,6 +526,17 @@ .read_data = dmc_tsc10_read_data, },#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH + [DEVTYPE_IRTOUCH] = { + .min_xc = 0x0, + .max_xc = 0x0fff, + .min_yc = 0x0, + .max_yc = 0x0fff, + .rept_size = 8, + .read_data = irtouch_read_data, + }, +#endif };