Input: usbtouchscreen - add support for e2i touchscreen controller

This patch adds support for the e2i touchscreen controller used in the Mimo 740 (and probably in other e2i touchscreen products). Tested on Mimo 740. Signed-off-by: Florian Echtler <floe@butterbrot.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
git-mirror · Jul 28, 2009 · 9e3b258 · 9e3b258
1 parent 703490f
commit 9e3b258
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diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
@@ -474,6 +474,11 @@ config TOUCHSCREEN_USB_JASTEC
 	bool "JASTEC/DigiTech DTR-02U USB touch controller device support" if EMBEDDED
 	depends on TOUCHSCREEN_USB_COMPOSITE
 
+config TOUCHSCREEN_USB_E2I
+	default y
+	bool "e2i Touchscreen controller (e.g. from Mimo 740)"
+	depends on TOUCHSCREEN_USB_COMPOSITE
+
 config TOUCHSCREEN_TOUCHIT213
 	tristate "Sahara TouchIT-213 touchscreen"
 	select SERIO

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
@@ -120,6 +120,7 @@ enum {
 	DEVTYPE_GENERAL_TOUCH,
 	DEVTYPE_GOTOP,
 	DEVTYPE_JASTEC,
+	DEVTYPE_E2I,
 };
 
 #define USB_DEVICE_HID_CLASS(vend, prod) \
@@ -197,10 +198,46 @@ static struct usb_device_id usbtouch_devices[] = {
 	{USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 #endif
 
+#ifdef CONFIG_TOUCHSCREEN_USB_E2I
+	{USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
+#endif
 	{}
 };
 
 
+/*****************************************************************************
+ * e2i Part
+ */
+
+#ifdef CONFIG_TOUCHSCREEN_USB_E2I
+static int e2i_init(struct usbtouch_usb *usbtouch)
+{
+	int ret;
+
+	ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
+	                      0x01, 0x02, 0x0000, 0x0081,
+	                      NULL, 0, USB_CTRL_SET_TIMEOUT);
+
+	dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
+	    __func__, ret);
+	return ret;
+}
+
+static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	int tmp = (pkt[0] << 8) | pkt[1];
+	dev->x  = (pkt[2] << 8) | pkt[3];
+	dev->y  = (pkt[4] << 8) | pkt[5];
+
+	tmp = tmp - 0xA000;
+	dev->touch = (tmp > 0);
+	dev->press = (tmp > 0 ? tmp : 0);
+
+	return 1;
+}
+#endif
+
+
 /*****************************************************************************
  * eGalax part
  */
@@ -734,6 +771,18 @@ static struct usbtouch_device_info usbtouch_dev_info[] = {
 		.read_data	= jastec_read_data,
 	},
 #endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_E2I
+	[DEVTYPE_E2I] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x7fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x7fff,
+		.rept_size	= 6,
+		.init		= e2i_init,
+		.read_data	= e2i_read_data,
+	},
+#endif
 };