Input: usbtouchscreen - add support for ET&T TC5UH touchscreen controller

This patch adds support for the ET&T TC5UH 5-wire USB touchscreen controller.
More info at http://www.etandt.com.tw/board_solution.html

Signed-off-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/touchscreen/Kconfig

@@ -520,6 +520,11 @@ config TOUCHSCREEN_USB_ZYTRONIC
 	bool "Zytronic controller" if EMBEDDED
 	depends on TOUCHSCREEN_USB_COMPOSITE
 
+config TOUCHSCREEN_USB_ETT_TC5UH
+	default y
+	bool "ET&T TC5UH touchscreen controler support" if EMBEDDED
+	depends on TOUCHSCREEN_USB_COMPOSITE
+
 config TOUCHSCREEN_TOUCHIT213
 	tristate "Sahara TouchIT-213 touchscreen"
 	select SERIO

drivers/input/touchscreen/usbtouchscreen.c

@@ -132,6 +132,7 @@ enum {
 	DEVTYPE_JASTEC,
 	DEVTYPE_E2I,
 	DEVTYPE_ZYTRONIC,
+	DEVTYPE_TC5UH,
 };
 
 #define USB_DEVICE_HID_CLASS(vend, prod) \
@@ -217,6 +218,10 @@ static struct usb_device_id usbtouch_devices[] = {
 	{USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 #endif
 
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
+	{USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC5UH},
+#endif
+
 	{}
 };
 
@@ -554,6 +559,19 @@ static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 }
 #endif
 
+/*****************************************************************************
+ * ET&T TC5UH part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
+static int tc5uh_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
+	dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
+	dev->touch = pkt[0] & 0x01;
+
+	return 1;
+}
+#endif
 
 /*****************************************************************************
  * IdealTEK URTC1000 Part
@@ -844,6 +862,17 @@ static struct usbtouch_device_info usbtouch_dev_info[] = {
 		.irq_always     = true,
 	},
 #endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
+	[DEVTYPE_TC5UH] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x0fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x0fff,
+		.rept_size	= 5,
+		.read_data	= tc5uh_read_data,
+	},
+#endif
 };