Initial import

1 files changed, 1769 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
new file mode 100644
index 000000000..f2c6c352c
--- /dev/null
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -0,0 +1,1769 @@
+/******************************************************************************
+ * usbtouchscreen.c
+ * Driver for USB Touchscreens, supporting those devices:
+ *  - eGalax Touchkit
+ *    includes eTurboTouch CT-410/510/700
+ *  - 3M/Microtouch  EX II series
+ *  - ITM
+ *  - PanJit TouchSet
+ *  - eTurboTouch
+ *  - Gunze AHL61
+ *  - DMC TSC-10/25
+ *  - IRTOUCHSYSTEMS/UNITOP
+ *  - IdealTEK URTC1000
+ *  - General Touch
+ *  - GoTop Super_Q2/GogoPen/PenPower tablets
+ *  - JASTEC USB touch controller/DigiTech DTR-02U
+ *  - Zytronic capacitive touchscreen
+ *  - NEXIO/iNexio
+ *  - Elo TouchSystems 2700 IntelliTouch
+ *  - EasyTouch USB Dual/Multi touch controller from Data Modul
+ *
+ * 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
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Driver is based on touchkitusb.c
+ * - ITM parts are from itmtouch.c
+ * - 3M parts are from mtouchusb.c
+ * - PanJit parts are from an unmerged driver by Lanslott Gish
+ * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
+ *   driver from Marius Vollmer
+ *
+ *****************************************************************************/
+
+//#define DEBUG
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/usb/input.h>
+#include <linux/hid.h>
+
+
+#define DRIVER_VERSION		"v0.6"
+#define DRIVER_AUTHOR		"Daniel Ritz <daniel.ritz@gmx.ch>"
+#define DRIVER_DESC		"USB Touchscreen Driver"
+
+static bool swap_xy;
+module_param(swap_xy, bool, 0644);
+MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
+
+static bool hwcalib_xy;
+module_param(hwcalib_xy, bool, 0644);
+MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
+
+/* device specifc data/functions */
+struct usbtouch_usb;
+struct usbtouch_device_info {
+	int min_xc, max_xc;
+	int min_yc, max_yc;
+	int min_press, max_press;
+	int rept_size;
+
+	/*
+	 * Always service the USB devices irq not just when the input device is
+	 * open. This is useful when devices have a watchdog which prevents us
+	 * from periodically polling the device. Leave this unset unless your
+	 * touchscreen device requires it, as it does consume more of the USB
+	 * bandwidth.
+	 */
+	bool irq_always;
+
+	void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
+
+	/*
+	 * used to get the packet len. possible return values:
+	 * > 0: packet len
+	 * = 0: skip one byte
+	 * < 0: -return value more bytes needed
+	 */
+	int  (*get_pkt_len) (unsigned char *pkt, int len);
+
+	int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
+	int  (*alloc)       (struct usbtouch_usb *usbtouch);
+	int  (*init)        (struct usbtouch_usb *usbtouch);
+	void (*exit)	    (struct usbtouch_usb *usbtouch);
+};
+
+/* a usbtouch device */
+struct usbtouch_usb {
+	unsigned char *data;
+	dma_addr_t data_dma;
+	int data_size;
+	unsigned char *buffer;
+	int buf_len;
+	struct urb *irq;
+	struct usb_interface *interface;
+	struct input_dev *input;
+	struct usbtouch_device_info *type;
+	char name[128];
+	char phys[64];
+	void *priv;
+
+	int x, y;
+	int touch, press;
+};
+
+
+/* device types */
+enum {
+	DEVTYPE_IGNORE = -1,
+	DEVTYPE_EGALAX,
+	DEVTYPE_PANJIT,
+	DEVTYPE_3M,
+	DEVTYPE_ITM,
+	DEVTYPE_ETURBO,
+	DEVTYPE_GUNZE,
+	DEVTYPE_DMC_TSC10,
+	DEVTYPE_IRTOUCH,
+	DEVTYPE_IRTOUCH_HIRES,
+	DEVTYPE_IDEALTEK,
+	DEVTYPE_GENERAL_TOUCH,
+	DEVTYPE_GOTOP,
+	DEVTYPE_JASTEC,
+	DEVTYPE_E2I,
+	DEVTYPE_ZYTRONIC,
+	DEVTYPE_TC45USB,
+	DEVTYPE_NEXIO,
+	DEVTYPE_ELO,
+	DEVTYPE_ETOUCH,
+};
+
+#define USB_DEVICE_HID_CLASS(vend, prod) \
+	.match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
+		| USB_DEVICE_ID_MATCH_DEVICE, \
+	.idVendor = (vend), \
+	.idProduct = (prod), \
+	.bInterfaceClass = USB_INTERFACE_CLASS_HID
+
+static const struct usb_device_id usbtouch_devices[] = {
+#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
+	/* ignore the HID capable devices, handled by usbhid */
+	{USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
+	{USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
+
+	/* normal device IDs */
+	{USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
+	{USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
+	{USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
+	{USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
+	{USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
+	{USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
+	{USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
+	{USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
+	{USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
+	{USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
+	{USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_3M
+	{USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ITM
+	{USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
+	{USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
+	{USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
+	{USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
+	{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},
+	{USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
+	{USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
+	{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
+
+#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
+	{USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_E2I
+	{USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
+	{USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
+	/* TC5UH */
+	{USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
+	/* TC4UM */
+	{USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
+	/* data interface only */
+	{USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
+		.driver_info = DEVTYPE_NEXIO},
+	{USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
+		.driver_info = DEVTYPE_NEXIO},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ELO
+	{USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
+	{USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
+#endif
+
+	{}
+};
+
+
+/*****************************************************************************
+ * e2i Part
+ */
+
+#ifdef CONFIG_TOUCHSCREEN_USB_E2I
+static int e2i_init(struct usbtouch_usb *usbtouch)
+{
+	int ret;
+	struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
+
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+	                      0x01, 0x02, 0x0000, 0x0081,
+	                      NULL, 0, USB_CTRL_SET_TIMEOUT);
+
+	dev_dbg(&usbtouch->interface->dev,
+		"%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
+		__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
+ */
+
+#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
+
+#ifndef MULTI_PACKET
+#define MULTI_PACKET
+#endif
+
+#define EGALAX_PKT_TYPE_MASK		0xFE
+#define EGALAX_PKT_TYPE_REPT		0x80
+#define EGALAX_PKT_TYPE_DIAG		0x0A
+
+static int egalax_init(struct usbtouch_usb *usbtouch)
+{
+	int ret, i;
+	unsigned char *buf;
+	struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
+
+	/*
+	 * An eGalax diagnostic packet kicks the device into using the right
+	 * protocol.  We send a "check active" packet.  The response will be
+	 * read later and ignored.
+	 */
+
+	buf = kmalloc(3, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	buf[0] = EGALAX_PKT_TYPE_DIAG;
+	buf[1] = 1;	/* length */
+	buf[2] = 'A';	/* command - check active */
+
+	for (i = 0; i < 3; i++) {
+		ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+				      0,
+				      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				      0, 0, buf, 3,
+				      USB_CTRL_SET_TIMEOUT);
+		if (ret >= 0) {
+			ret = 0;
+			break;
+		}
+		if (ret != -EPIPE)
+			break;
+	}
+
+	kfree(buf);
+
+	return ret;
+}
+
+static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
+		return 0;
+
+	dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
+	dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
+	dev->touch = pkt[0] & 0x01;
+
+	return 1;
+}
+
+static int egalax_get_pkt_len(unsigned char *buf, int len)
+{
+	switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
+	case EGALAX_PKT_TYPE_REPT:
+		return 5;
+
+	case EGALAX_PKT_TYPE_DIAG:
+		if (len < 2)
+			return -1;
+
+		return buf[1] + 2;
+	}
+
+	return 0;
+}
+#endif
+
+/*****************************************************************************
+ * EasyTouch part
+ */
+
+#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
+
+#ifndef MULTI_PACKET
+#define MULTI_PACKET
+#endif
+
+#define ETOUCH_PKT_TYPE_MASK		0xFE
+#define ETOUCH_PKT_TYPE_REPT		0x80
+#define ETOUCH_PKT_TYPE_REPT2		0xB0
+#define ETOUCH_PKT_TYPE_DIAG		0x0A
+
+static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
+		(pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
+		return 0;
+
+	dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
+	dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
+	dev->touch = pkt[0] & 0x01;
+
+	return 1;
+}
+
+static int etouch_get_pkt_len(unsigned char *buf, int len)
+{
+	switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
+	case ETOUCH_PKT_TYPE_REPT:
+	case ETOUCH_PKT_TYPE_REPT2:
+		return 5;
+
+	case ETOUCH_PKT_TYPE_DIAG:
+		if (len < 2)
+			return -1;
+
+		return buf[1] + 2;
+	}
+
+	return 0;
+}
+#endif
+
+/*****************************************************************************
+ * PanJit Part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
+static int panjit_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
+
+
+/*****************************************************************************
+ * 3M/Microtouch Part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_3M
+
+#define MTOUCHUSB_ASYNC_REPORT          1
+#define MTOUCHUSB_RESET                 7
+#define MTOUCHUSB_REQ_CTRLLR_ID         10
+
+static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	if (hwcalib_xy) {
+		dev->x = (pkt[4] << 8) | pkt[3];
+		dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
+	} else {
+		dev->x = (pkt[8] << 8) | pkt[7];
+		dev->y = (pkt[10] << 8) | pkt[9];
+	}
+	dev->touch = (pkt[2] & 0x40) ? 1 : 0;
+
+	return 1;
+}
+
+static int mtouch_init(struct usbtouch_usb *usbtouch)
+{
+	int ret, i;
+	struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
+
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+	                      MTOUCHUSB_RESET,
+	                      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+	                      1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
+	dev_dbg(&usbtouch->interface->dev,
+		"%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
+		__func__, ret);
+	if (ret < 0)
+		return ret;
+	msleep(150);
+
+	for (i = 0; i < 3; i++) {
+		ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+				      MTOUCHUSB_ASYNC_REPORT,
+				      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				      1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
+		dev_dbg(&usbtouch->interface->dev,
+			"%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
+			__func__, ret);
+		if (ret >= 0)
+			break;
+		if (ret != -EPIPE)
+			return ret;
+	}
+
+	/* Default min/max xy are the raw values, override if using hw-calib */
+	if (hwcalib_xy) {
+		input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
+		input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
+	}
+
+	return 0;
+}
+#endif
+
+
+/*****************************************************************************
+ * ITM Part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_ITM
+static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	int touch;
+	/*
+	 * ITM devices report invalid x/y data if not touched.
+	 * if the screen was touched before but is not touched any more
+	 * report touch as 0 with the last valid x/y data once. then stop
+	 * reporting data until touched again.
+	 */
+	dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
+
+	touch = ~pkt[7] & 0x20;
+	if (!touch) {
+		if (dev->touch) {
+			dev->touch = 0;
+			return 1;
+		}
+
+		return 0;
+	}
+
+	dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
+	dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
+	dev->touch = touch;
+
+	return 1;
+}
+#endif
+
+
+/*****************************************************************************
+ * eTurboTouch part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
+#ifndef MULTI_PACKET
+#define MULTI_PACKET
+#endif
+static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	unsigned int shift;
+
+	/* packets should start with sync */
+	if (!(pkt[0] & 0x80))
+		return 0;
+
+	shift = (6 - (pkt[0] & 0x03));
+	dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
+	dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
+	dev->touch = (pkt[0] & 0x10) ? 1 : 0;
+
+	return 1;
+}
+
+static int eturbo_get_pkt_len(unsigned char *buf, int len)
+{
+	if (buf[0] & 0x80)
+		return 5;
+	if (buf[0] == 0x01)
+		return 3;
+	return 0;
+}
+#endif
+
+
+/*****************************************************************************
+ * Gunze part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
+static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
+		return 0;
+
+	dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
+	dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
+	dev->touch = pkt[0] & 0x20;
+
+	return 1;
+}
+#endif
+
+/*****************************************************************************
+ * DMC TSC-10/25 Part
+ *
+ * Documentation about the controller and it's protocol can be found at
+ *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
+ *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
+
+/* supported data rates. currently using 130 */
+#define TSC10_RATE_POINT	0x50
+#define TSC10_RATE_30		0x40
+#define TSC10_RATE_50		0x41
+#define TSC10_RATE_80		0x42
+#define TSC10_RATE_100		0x43
+#define TSC10_RATE_130		0x44
+#define TSC10_RATE_150		0x45
+
+/* commands */
+#define TSC10_CMD_RESET		0x55
+#define TSC10_CMD_RATE		0x05
+#define TSC10_CMD_DATA1		0x01
+
+static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
+{
+	struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
+	int ret = -ENOMEM;
+	unsigned char *buf;
+
+	buf = kmalloc(2, GFP_NOIO);
+	if (!buf)
+		goto err_nobuf;
+	/* reset */
+	buf[0] = buf[1] = 0xFF;
+	ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
+	                      TSC10_CMD_RESET,
+	                      USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+	                      0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
+	if (ret < 0)
+		goto err_out;
+	if (buf[0] != 0x06) {
+		ret = -ENODEV;
+		goto err_out;
+	}
+
+	/* set coordinate output rate */
+	buf[0] = buf[1] = 0xFF;
+	ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
+	                      TSC10_CMD_RATE,
+	                      USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+	                      TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
+	if (ret < 0)
+		goto err_out;
+	if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
+		ret = -ENODEV;
+		goto err_out;
+	}
+
+	/* start sending data */
+	ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
+	                      TSC10_CMD_DATA1,
+	                      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+	                      0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
+err_out:
+	kfree(buf);
+err_nobuf:
+	return ret;
+}
+
+
+static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
+	dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
+	dev->touch = pkt[0] & 0x01;
+
+	return 1;
+}
+#endif
+
+
+/*****************************************************************************
+ * 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
+
+/*****************************************************************************
+ * ET&T TC5UH/TC4UM part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
+static int tc45usb_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
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
+#ifndef MULTI_PACKET
+#define MULTI_PACKET
+#endif
+static int idealtek_get_pkt_len(unsigned char *buf, int len)
+{
+	if (buf[0] & 0x80)
+		return 5;
+	if (buf[0] == 0x01)
+		return len;
+	return 0;
+}
+
+static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	switch (pkt[0] & 0x98) {
+	case 0x88:
+		/* touch data in IdealTEK mode */
+		dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
+		dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
+		dev->touch = (pkt[0] & 0x40) ? 1 : 0;
+		return 1;
+
+	case 0x98:
+		/* touch data in MT emulation mode */
+		dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
+		dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
+		dev->touch = (pkt[0] & 0x40) ? 1 : 0;
+		return 1;
+
+	default:
+		return 0;
+	}
+}
+#endif
+
+/*****************************************************************************
+ * General Touch Part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
+static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	dev->x = (pkt[2] << 8) | pkt[1];
+	dev->y = (pkt[4] << 8) | pkt[3];
+	dev->press = pkt[5] & 0xff;
+	dev->touch = pkt[0] & 0x01;
+
+	return 1;
+}
+#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
+
+/*****************************************************************************
+ * JASTEC Part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
+static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
+	dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
+	dev->touch = (pkt[0] & 0x40) >> 6;
+
+	return 1;
+}
+#endif
+
+/*****************************************************************************
+ * Zytronic Part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
+static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+	struct usb_interface *intf = dev->interface;
+
+	switch (pkt[0]) {
+	case 0x3A: /* command response */
+		dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
+		break;
+
+	case 0xC0: /* down */
+		dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
+		dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
+		dev->touch = 1;
+		dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
+		return 1;
+
+	case 0x80: /* up */
+		dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
+		dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
+		dev->touch = 0;
+		dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
+		return 1;
+
+	default:
+		dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
+		break;
+	}
+
+	return 0;
+}
+#endif
+
+/*****************************************************************************
+ * NEXIO Part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
+
+#define NEXIO_TIMEOUT	5000
+#define NEXIO_BUFSIZE	1024
+#define NEXIO_THRESHOLD	50
+
+struct nexio_priv {
+	struct urb *ack;
+	unsigned char *ack_buf;
+};
+
+struct nexio_touch_packet {
+	u8	flags;		/* 0xe1 = touch, 0xe1 = release */
+	__be16	data_len;	/* total bytes of touch data */
+	__be16	x_len;		/* bytes for X axis */
+	__be16	y_len;		/* bytes for Y axis */
+	u8	data[];
+} __attribute__ ((packed));
+
+static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
+static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
+
+static void nexio_ack_complete(struct urb *urb)
+{
+}
+
+static int nexio_alloc(struct usbtouch_usb *usbtouch)
+{
+	struct nexio_priv *priv;
+	int ret = -ENOMEM;
+
+	usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
+	if (!usbtouch->priv)
+		goto out_buf;
+
+	priv = usbtouch->priv;
+
+	priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
+				GFP_KERNEL);
+	if (!priv->ack_buf)
+		goto err_priv;
+
+	priv->ack = usb_alloc_urb(0, GFP_KERNEL);
+	if (!priv->ack) {
+		dev_dbg(&usbtouch->interface->dev,
+			"%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
+		goto err_ack_buf;
+	}
+
+	return 0;
+
+err_ack_buf:
+	kfree(priv->ack_buf);
+err_priv:
+	kfree(priv);
+out_buf:
+	return ret;
+}
+
+static int nexio_init(struct usbtouch_usb *usbtouch)
+{
+	struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
+	struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
+	struct nexio_priv *priv = usbtouch->priv;
+	int ret = -ENOMEM;
+	int actual_len, i;
+	unsigned char *buf;
+	char *firmware_ver = NULL, *device_name = NULL;
+	int input_ep = 0, output_ep = 0;
+
+	/* find first input and output endpoint */
+	for (i = 0; i < interface->desc.bNumEndpoints; i++) {
+		if (!input_ep &&
+		    usb_endpoint_dir_in(&interface->endpoint[i].desc))
+			input_ep = interface->endpoint[i].desc.bEndpointAddress;
+		if (!output_ep &&
+		    usb_endpoint_dir_out(&interface->endpoint[i].desc))
+			output_ep = interface->endpoint[i].desc.bEndpointAddress;
+	}
+	if (!input_ep || !output_ep)
+		return -ENXIO;
+
+	buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
+	if (!buf)
+		goto out_buf;
+
+	/* two empty reads */
+	for (i = 0; i < 2; i++) {
+		ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
+				   buf, NEXIO_BUFSIZE, &actual_len,
+				   NEXIO_TIMEOUT);
+		if (ret < 0)
+			goto out_buf;
+	}
+
+	/* send init command */
+	memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
+	ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
+			   buf, sizeof(nexio_init_pkt), &actual_len,
+			   NEXIO_TIMEOUT);
+	if (ret < 0)
+		goto out_buf;
+
+	/* read replies */
+	for (i = 0; i < 3; i++) {
+		memset(buf, 0, NEXIO_BUFSIZE);
+		ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
+				   buf, NEXIO_BUFSIZE, &actual_len,
+				   NEXIO_TIMEOUT);
+		if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
+			continue;
+		switch (buf[0]) {
+		case 0x83:	/* firmware version */
+			if (!firmware_ver)
+				firmware_ver = kstrdup(&buf[2], GFP_NOIO);
+			break;
+		case 0x84:	/* device name */
+			if (!device_name)
+				device_name = kstrdup(&buf[2], GFP_NOIO);
+			break;
+		}
+	}
+
+	printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
+	       device_name, firmware_ver);
+
+	kfree(firmware_ver);
+	kfree(device_name);
+
+	usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
+			  priv->ack_buf, sizeof(nexio_ack_pkt),
+			  nexio_ack_complete, usbtouch);
+	ret = 0;
+
+out_buf:
+	kfree(buf);
+	return ret;
+}
+
+static void nexio_exit(struct usbtouch_usb *usbtouch)
+{
+	struct nexio_priv *priv = usbtouch->priv;
+
+	usb_kill_urb(priv->ack);
+	usb_free_urb(priv->ack);
+	kfree(priv->ack_buf);
+	kfree(priv);
+}
+
+static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
+{
+	struct nexio_touch_packet *packet = (void *) pkt;
+	struct nexio_priv *priv = usbtouch->priv;
+	unsigned int data_len = be16_to_cpu(packet->data_len);
+	unsigned int x_len = be16_to_cpu(packet->x_len);
+	unsigned int y_len = be16_to_cpu(packet->y_len);
+	int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
+
+	/* got touch data? */
+	if ((pkt[0] & 0xe0) != 0xe0)
+		return 0;
+
+	if (data_len > 0xff)
+		data_len -= 0x100;
+	if (x_len > 0xff)
+		x_len -= 0x80;
+
+	/* send ACK */
+	ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
+
+	if (!usbtouch->type->max_xc) {
+		usbtouch->type->max_xc = 2 * x_len;
+		input_set_abs_params(usbtouch->input, ABS_X,
+				     0, usbtouch->type->max_xc, 0, 0);
+		usbtouch->type->max_yc = 2 * y_len;
+		input_set_abs_params(usbtouch->input, ABS_Y,
+				     0, usbtouch->type->max_yc, 0, 0);
+	}
+	/*
+	 * The device reports state of IR sensors on X and Y axes.
+	 * Each byte represents "darkness" percentage (0-100) of one element.
+	 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
+	 * This also means that there's a limited multi-touch capability but
+	 * it's disabled (and untested) here as there's no X driver for that.
+	 */
+	begin_x = end_x = begin_y = end_y = -1;
+	for (x = 0; x < x_len; x++) {
+		if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
+			begin_x = x;
+			continue;
+		}
+		if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
+			end_x = x - 1;
+			for (y = x_len; y < data_len; y++) {
+				if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
+					begin_y = y - x_len;
+					continue;
+				}
+				if (end_y == -1 &&
+				    begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
+					end_y = y - 1 - x_len;
+					w = end_x - begin_x;
+					h = end_y - begin_y;
+#if 0
+					/* multi-touch */
+					input_report_abs(usbtouch->input,
+						    ABS_MT_TOUCH_MAJOR, max(w,h));
+					input_report_abs(usbtouch->input,
+						    ABS_MT_TOUCH_MINOR, min(x,h));
+					input_report_abs(usbtouch->input,
+						    ABS_MT_POSITION_X, 2*begin_x+w);
+					input_report_abs(usbtouch->input,
+						    ABS_MT_POSITION_Y, 2*begin_y+h);
+					input_report_abs(usbtouch->input,
+						    ABS_MT_ORIENTATION, w > h);
+					input_mt_sync(usbtouch->input);
+#endif
+					/* single touch */
+					usbtouch->x = 2 * begin_x + w;
+					usbtouch->y = 2 * begin_y + h;
+					usbtouch->touch = packet->flags & 0x01;
+					begin_y = end_y = -1;
+					return 1;
+				}
+			}
+			begin_x = end_x = -1;
+		}
+
+	}
+	return 0;
+}
+#endif
+
+
+/*****************************************************************************
+ * ELO part
+ */
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ELO
+
+static int elo_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[6] > 0;
+	dev->press = pkt[6];
+
+	return 1;
+}
+#endif
+
+
+/*****************************************************************************
+ * the different device descriptors
+ */
+#ifdef MULTI_PACKET
+static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
+				   unsigned char *pkt, int len);
+#endif
+
+static struct usbtouch_device_info usbtouch_dev_info[] = {
+#ifdef CONFIG_TOUCHSCREEN_USB_ELO
+	[DEVTYPE_ELO] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x0fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x0fff,
+		.max_press	= 0xff,
+		.rept_size	= 8,
+		.read_data	= elo_read_data,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
+	[DEVTYPE_EGALAX] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x07ff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x07ff,
+		.rept_size	= 16,
+		.process_pkt	= usbtouch_process_multi,
+		.get_pkt_len	= egalax_get_pkt_len,
+		.read_data	= egalax_read_data,
+		.init		= egalax_init,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
+	[DEVTYPE_PANJIT] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x0fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x0fff,
+		.rept_size	= 8,
+		.read_data	= panjit_read_data,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_3M
+	[DEVTYPE_3M] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x4000,
+		.min_yc		= 0x0,
+		.max_yc		= 0x4000,
+		.rept_size	= 11,
+		.read_data	= mtouch_read_data,
+		.init		= mtouch_init,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ITM
+	[DEVTYPE_ITM] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x0fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x0fff,
+		.max_press	= 0xff,
+		.rept_size	= 8,
+		.read_data	= itm_read_data,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
+	[DEVTYPE_ETURBO] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x07ff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x07ff,
+		.rept_size	= 8,
+		.process_pkt	= usbtouch_process_multi,
+		.get_pkt_len	= eturbo_get_pkt_len,
+		.read_data	= eturbo_read_data,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
+	[DEVTYPE_GUNZE] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x0fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x0fff,
+		.rept_size	= 4,
+		.read_data	= gunze_read_data,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
+	[DEVTYPE_DMC_TSC10] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x03ff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x03ff,
+		.rept_size	= 5,
+		.init		= dmc_tsc10_init,
+		.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,
+	},
+
+	[DEVTYPE_IRTOUCH_HIRES] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x7fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x7fff,
+		.rept_size	= 8,
+		.read_data	= irtouch_read_data,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
+	[DEVTYPE_IDEALTEK] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x0fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x0fff,
+		.rept_size	= 8,
+		.process_pkt	= usbtouch_process_multi,
+		.get_pkt_len	= idealtek_get_pkt_len,
+		.read_data	= idealtek_read_data,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
+	[DEVTYPE_GENERAL_TOUCH] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x7fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x7fff,
+		.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
+
+#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
+	[DEVTYPE_JASTEC] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x0fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x0fff,
+		.rept_size	= 4,
+		.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
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
+	[DEVTYPE_ZYTRONIC] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x03ff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x03ff,
+		.rept_size	= 5,
+		.read_data	= zytronic_read_data,
+		.irq_always     = true,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
+	[DEVTYPE_TC45USB] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x0fff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x0fff,
+		.rept_size	= 5,
+		.read_data	= tc45usb_read_data,
+	},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
+	[DEVTYPE_NEXIO] = {
+		.rept_size	= 1024,
+		.irq_always	= true,
+		.read_data	= nexio_read_data,
+		.alloc		= nexio_alloc,
+		.init		= nexio_init,
+		.exit		= nexio_exit,
+	},
+#endif
+#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
+	[DEVTYPE_ETOUCH] = {
+		.min_xc		= 0x0,
+		.max_xc		= 0x07ff,
+		.min_yc		= 0x0,
+		.max_yc		= 0x07ff,
+		.rept_size	= 16,
+		.process_pkt	= usbtouch_process_multi,
+		.get_pkt_len	= etouch_get_pkt_len,
+		.read_data	= etouch_read_data,
+	},
+#endif
+};
+
+
+/*****************************************************************************
+ * Generic Part
+ */
+static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
+                                 unsigned char *pkt, int len)
+{
+	struct usbtouch_device_info *type = usbtouch->type;
+
+	if (!type->read_data(usbtouch, pkt))
+			return;
+
+	input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
+
+	if (swap_xy) {
+		input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
+		input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
+	} else {
+		input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
+		input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
+	}
+	if (type->max_press)
+		input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
+	input_sync(usbtouch->input);
+}
+
+
+#ifdef MULTI_PACKET
+static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
+                                   unsigned char *pkt, int len)
+{
+	unsigned char *buffer;
+	int pkt_len, pos, buf_len, tmp;
+
+	/* process buffer */
+	if (unlikely(usbtouch->buf_len)) {
+		/* try to get size */
+		pkt_len = usbtouch->type->get_pkt_len(
+				usbtouch->buffer, usbtouch->buf_len);
+
+		/* drop? */
+		if (unlikely(!pkt_len))
+			goto out_flush_buf;
+
+		/* need to append -pkt_len bytes before able to get size */
+		if (unlikely(pkt_len < 0)) {
+			int append = -pkt_len;
+			if (unlikely(append > len))
+			       append = len;
+			if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
+				goto out_flush_buf;
+			memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
+			usbtouch->buf_len += append;
+
+			pkt_len = usbtouch->type->get_pkt_len(
+					usbtouch->buffer, usbtouch->buf_len);
+			if (pkt_len < 0)
+				return;
+		}
+
+		/* append */
+		tmp = pkt_len - usbtouch->buf_len;
+		if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
+			goto out_flush_buf;
+		memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
+		usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
+
+		buffer = pkt + tmp;
+		buf_len = len - tmp;
+	} else {
+		buffer = pkt;
+		buf_len = len;
+	}
+
+	/* loop over the received packet, process */
+	pos = 0;
+	while (pos < buf_len) {
+		/* get packet len */
+		pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
+							buf_len - pos);
+
+		/* unknown packet: skip one byte */
+		if (unlikely(!pkt_len)) {
+			pos++;
+			continue;
+		}
+
+		/* full packet: process */
+		if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
+			usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
+		} else {
+			/* incomplete packet: save in buffer */
+			memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
+			usbtouch->buf_len = buf_len - pos;
+			return;
+		}
+		pos += pkt_len;
+	}
+
+out_flush_buf:
+	usbtouch->buf_len = 0;
+	return;
+}
+#endif
+
+
+static void usbtouch_irq(struct urb *urb)
+{
+	struct usbtouch_usb *usbtouch = urb->context;
+	struct device *dev = &usbtouch->interface->dev;
+	int retval;
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		break;
+	case -ETIME:
+		/* this urb is timing out */
+		dev_dbg(dev,
+			"%s - urb timed out - was the device unplugged?\n",
+			__func__);
+		return;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+	case -EPIPE:
+		/* this urb is terminated, clean up */
+		dev_dbg(dev, "%s - urb shutting down with status: %d\n",
+			__func__, urb->status);
+		return;
+	default:
+		dev_dbg(dev, "%s - nonzero urb status received: %d\n",
+			__func__, urb->status);
+		goto exit;
+	}
+
+	usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
+
+exit:
+	usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
+	retval = usb_submit_urb(urb, GFP_ATOMIC);
+	if (retval)
+		dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
+			__func__, retval);
+}
+
+static int usbtouch_open(struct input_dev *input)
+{
+	struct usbtouch_usb *usbtouch = input_get_drvdata(input);
+	int r;
+
+	usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
+
+	r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
+	if (r < 0)
+		goto out;
+
+	if (!usbtouch->type->irq_always) {
+		if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
+			r = -EIO;
+			goto out_put;
+		}
+	}
+
+	usbtouch->interface->needs_remote_wakeup = 1;
+out_put:
+	usb_autopm_put_interface(usbtouch->interface);
+out:
+	return r;
+}
+
+static void usbtouch_close(struct input_dev *input)
+{
+	struct usbtouch_usb *usbtouch = input_get_drvdata(input);
+	int r;
+
+	if (!usbtouch->type->irq_always)
+		usb_kill_urb(usbtouch->irq);
+	r = usb_autopm_get_interface(usbtouch->interface);
+	usbtouch->interface->needs_remote_wakeup = 0;
+	if (!r)
+		usb_autopm_put_interface(usbtouch->interface);
+}
+
+static int usbtouch_suspend
+(struct usb_interface *intf, pm_message_t message)
+{
+	struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
+
+	usb_kill_urb(usbtouch->irq);
+
+	return 0;
+}
+
+static int usbtouch_resume(struct usb_interface *intf)
+{
+	struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
+	struct input_dev *input = usbtouch->input;
+	int result = 0;
+
+	mutex_lock(&input->mutex);
+	if (input->users || usbtouch->type->irq_always)
+		result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
+	mutex_unlock(&input->mutex);
+
+	return result;
+}
+
+static int usbtouch_reset_resume(struct usb_interface *intf)
+{
+	struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
+	struct input_dev *input = usbtouch->input;
+	int err = 0;
+
+	/* reinit the device */
+	if (usbtouch->type->init) {
+		err = usbtouch->type->init(usbtouch);
+		if (err) {
+			dev_dbg(&intf->dev,
+				"%s - type->init() failed, err: %d\n",
+				__func__, err);
+			return err;
+		}
+	}
+
+	/* restart IO if needed */
+	mutex_lock(&input->mutex);
+	if (input->users)
+		err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
+	mutex_unlock(&input->mutex);
+
+	return err;
+}
+
+static void usbtouch_free_buffers(struct usb_device *udev,
+				  struct usbtouch_usb *usbtouch)
+{
+	usb_free_coherent(udev, usbtouch->data_size,
+			  usbtouch->data, usbtouch->data_dma);
+	kfree(usbtouch->buffer);
+}
+
+static struct usb_endpoint_descriptor *
+usbtouch_get_input_endpoint(struct usb_host_interface *interface)
+{
+	int i;
+
+	for (i = 0; i < interface->desc.bNumEndpoints; i++)
+		if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
+			return &interface->endpoint[i].desc;
+
+	return NULL;
+}
+
+static int usbtouch_probe(struct usb_interface *intf,
+			  const struct usb_device_id *id)
+{
+	struct usbtouch_usb *usbtouch;
+	struct input_dev *input_dev;
+	struct usb_endpoint_descriptor *endpoint;
+	struct usb_device *udev = interface_to_usbdev(intf);
+	struct usbtouch_device_info *type;
+	int err = -ENOMEM;
+
+	/* some devices are ignored */
+	if (id->driver_info == DEVTYPE_IGNORE)
+		return -ENODEV;
+
+	endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
+	if (!endpoint)
+		return -ENXIO;
+
+	usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!usbtouch || !input_dev)
+		goto out_free;
+
+	type = &usbtouch_dev_info[id->driver_info];
+	usbtouch->type = type;
+	if (!type->process_pkt)
+		type->process_pkt = usbtouch_process_pkt;
+
+	usbtouch->data_size = type->rept_size;
+	if (type->get_pkt_len) {
+		/*
+		 * When dealing with variable-length packets we should
+		 * not request more than wMaxPacketSize bytes at once
+		 * as we do not know if there is more data coming or
+		 * we filled exactly wMaxPacketSize bytes and there is
+		 * nothing else.
+		 */
+		usbtouch->data_size = min(usbtouch->data_size,
+					  usb_endpoint_maxp(endpoint));
+	}
+
+	usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
+					    GFP_KERNEL, &usbtouch->data_dma);
+	if (!usbtouch->data)
+		goto out_free;
+
+	if (type->get_pkt_len) {
+		usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
+		if (!usbtouch->buffer)
+			goto out_free_buffers;
+	}
+
+	usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!usbtouch->irq) {
+		dev_dbg(&intf->dev,
+			"%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
+		goto out_free_buffers;
+	}
+
+	usbtouch->interface = intf;
+	usbtouch->input = input_dev;
+
+	if (udev->manufacturer)
+		strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
+
+	if (udev->product) {
+		if (udev->manufacturer)
+			strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
+		strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
+	}
+
+	if (!strlen(usbtouch->name))
+		snprintf(usbtouch->name, sizeof(usbtouch->name),
+			"USB Touchscreen %04x:%04x",
+			 le16_to_cpu(udev->descriptor.idVendor),
+			 le16_to_cpu(udev->descriptor.idProduct));
+
+	usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
+	strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
+
+	input_dev->name = usbtouch->name;
+	input_dev->phys = usbtouch->phys;
+	usb_to_input_id(udev, &input_dev->id);
+	input_dev->dev.parent = &intf->dev;
+
+	input_set_drvdata(input_dev, usbtouch);
+
+	input_dev->open = usbtouch_open;
+	input_dev->close = usbtouch_close;
+
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+	input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
+	input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
+	if (type->max_press)
+		input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
+		                     type->max_press, 0, 0);
+
+	if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
+		usb_fill_int_urb(usbtouch->irq, udev,
+			 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
+			 usbtouch->data, usbtouch->data_size,
+			 usbtouch_irq, usbtouch, endpoint->bInterval);
+	else
+		usb_fill_bulk_urb(usbtouch->irq, udev,
+			 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
+			 usbtouch->data, usbtouch->data_size,
+			 usbtouch_irq, usbtouch);
+
+	usbtouch->irq->dev = udev;
+	usbtouch->irq->transfer_dma = usbtouch->data_dma;
+	usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	/* device specific allocations */
+	if (type->alloc) {
+		err = type->alloc(usbtouch);
+		if (err) {
+			dev_dbg(&intf->dev,
+				"%s - type->alloc() failed, err: %d\n",
+				__func__, err);
+			goto out_free_urb;
+		}
+	}
+
+	/* device specific initialisation*/
+	if (type->init) {
+		err = type->init(usbtouch);
+		if (err) {
+			dev_dbg(&intf->dev,
+				"%s - type->init() failed, err: %d\n",
+				__func__, err);
+			goto out_do_exit;
+		}
+	}
+
+	err = input_register_device(usbtouch->input);
+	if (err) {
+		dev_dbg(&intf->dev,
+			"%s - input_register_device failed, err: %d\n",
+			__func__, err);
+		goto out_do_exit;
+	}
+
+	usb_set_intfdata(intf, usbtouch);
+
+	if (usbtouch->type->irq_always) {
+		/* this can't fail */
+		usb_autopm_get_interface(intf);
+		err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
+		if (err) {
+			usb_autopm_put_interface(intf);
+			dev_err(&intf->dev,
+				"%s - usb_submit_urb failed with result: %d\n",
+				__func__, err);
+			goto out_unregister_input;
+		}
+	}
+
+	return 0;
+
+out_unregister_input:
+	input_unregister_device(input_dev);
+	input_dev = NULL;
+out_do_exit:
+	if (type->exit)
+		type->exit(usbtouch);
+out_free_urb:
+	usb_free_urb(usbtouch->irq);
+out_free_buffers:
+	usbtouch_free_buffers(udev, usbtouch);
+out_free:
+	input_free_device(input_dev);
+	kfree(usbtouch);
+	return err;
+}
+
+static void usbtouch_disconnect(struct usb_interface *intf)
+{
+	struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
+
+	if (!usbtouch)
+		return;
+
+	dev_dbg(&intf->dev,
+		"%s - usbtouch is initialized, cleaning up\n", __func__);
+
+	usb_set_intfdata(intf, NULL);
+	/* this will stop IO via close */
+	input_unregister_device(usbtouch->input);
+	usb_free_urb(usbtouch->irq);
+	if (usbtouch->type->exit)
+		usbtouch->type->exit(usbtouch);
+	usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
+	kfree(usbtouch);
+}
+
+MODULE_DEVICE_TABLE(usb, usbtouch_devices);
+
+static struct usb_driver usbtouch_driver = {
+	.name		= "usbtouchscreen",
+	.probe		= usbtouch_probe,
+	.disconnect	= usbtouch_disconnect,
+	.suspend	= usbtouch_suspend,
+	.resume		= usbtouch_resume,
+	.reset_resume	= usbtouch_reset_resume,
+	.id_table	= usbtouch_devices,
+	.supports_autosuspend = 1,
+};
+
+module_usb_driver(usbtouch_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS("touchkitusb");
+MODULE_ALIAS("itmtouch");
+MODULE_ALIAS("mtouchusb");