drivers/usb/input/mtouchusb.c - android_kernel_lge_hammerhead - Gitiles

 /******************************************************************************
  * mtouchusb.c  --  Driver for Microtouch (Now 3M) USB Touchscreens
  *
  * 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.
  *
  * Based upon original work by Radoslaw Garbacz (usb-support@ite.pl)
  *  (http://freshmeat.net/projects/3mtouchscreendriver)
  *
  * History
  *
  *  0.3 & 0.4  2002 (TEJ) tejohnson@yahoo.com
  *    Updated to 2.4.18, then 2.4.19
  *    Old version still relied on stealing a minor
  *
  *  0.5  02/26/2004 (TEJ) tejohnson@yahoo.com
  *    Complete rewrite using Linux Input in 2.6.3
  *    Unfortunately no calibration support at this time
  *
  *  1.4 04/25/2004 (TEJ) tejohnson@yahoo.com
  *    Changed reset from standard USB dev reset to vendor reset
  *    Changed data sent to host from compensated to raw coordinates
  *    Eliminated vendor/product module params
  *    Performed multiple successful tests with an EXII-5010UC
  *
  *  1.5 02/27/2005 ddstreet@ieee.org
  *    Added module parameter to select raw or hw-calibrated coordinate reporting
  *
  *****************************************************************************/

 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/usb/input.h>

 #define MTOUCHUSB_MIN_XC                0x0
 #define MTOUCHUSB_MAX_RAW_XC            0x4000
 #define MTOUCHUSB_MAX_CALIB_XC          0xffff
 #define MTOUCHUSB_XC_FUZZ               0x0
 #define MTOUCHUSB_XC_FLAT               0x0
 #define MTOUCHUSB_MIN_YC                0x0
 #define MTOUCHUSB_MAX_RAW_YC            0x4000
 #define MTOUCHUSB_MAX_CALIB_YC          0xffff
 #define MTOUCHUSB_YC_FUZZ               0x0
 #define MTOUCHUSB_YC_FLAT               0x0

 #define MTOUCHUSB_ASYNC_REPORT          1
 #define MTOUCHUSB_RESET                 7
 #define MTOUCHUSB_REPORT_DATA_SIZE      11
 #define MTOUCHUSB_REQ_CTRLLR_ID         10

 #define MTOUCHUSB_GET_RAW_XC(data)      (data[8]<<8 | data[7])
 #define MTOUCHUSB_GET_CALIB_XC(data)    (data[4]<<8 | data[3])
 #define MTOUCHUSB_GET_RAW_YC(data)      (data[10]<<8 | data[9])
 #define MTOUCHUSB_GET_CALIB_YC(data)    (data[6]<<8 | data[5])
 #define MTOUCHUSB_GET_XC(data)          (raw_coordinates ? \
                                          MTOUCHUSB_GET_RAW_XC(data) : \
                                          MTOUCHUSB_GET_CALIB_XC(data))
 #define MTOUCHUSB_GET_YC(data)          (raw_coordinates ? \
                                          MTOUCHUSB_GET_RAW_YC(data) : \
                                          MTOUCHUSB_GET_CALIB_YC(data))
 #define MTOUCHUSB_GET_TOUCHED(data)     ((data[2] & 0x40) ? 1:0)

 #define DRIVER_VERSION "v1.5"
 #define DRIVER_AUTHOR "Todd E. Johnson, tejohnson@yahoo.com"
 #define DRIVER_DESC "3M USB Touchscreen Driver"
 #define DRIVER_LICENSE "GPL"

 static int raw_coordinates = 1;

 module_param(raw_coordinates, bool, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(raw_coordinates, "report raw coordinate values (y, default) or hardware-calibrated coordinate values (n)");

 struct mtouch_usb {
 	unsigned char *data;
 	dma_addr_t data_dma;
 	struct urb *irq;
 	struct usb_device *udev;
 	struct input_dev *input;
 	char name[128];
 	char phys[64];
 };

 static struct usb_device_id mtouchusb_devices[] = {
 	{ USB_DEVICE(0x0596, 0x0001) },
 	{ }
 };

 static void mtouchusb_irq(struct urb *urb, struct pt_regs *regs)
 {
 	struct mtouch_usb *mtouch = urb->context;
 	int retval;

 	switch (urb->status) {
 	case 0:
 		/* success */
 		break;
 	case -ETIMEDOUT:
 		/* this urb is timing out */
 		dbg("%s - urb timed out - was the device unplugged?",
 		    __FUNCTION__);
 		return;
 	case -ECONNRESET:
 	case -ENOENT:
 	case -ESHUTDOWN:
 		/* this urb is terminated, clean up */
 		dbg("%s - urb shutting down with status: %d",
 		    __FUNCTION__, urb->status);
 		return;
 	default:
 		dbg("%s - nonzero urb status received: %d",
 		    __FUNCTION__, urb->status);
 		goto exit;
 	}

 	input_regs(mtouch->input, regs);
 	input_report_key(mtouch->input, BTN_TOUCH,
 			 MTOUCHUSB_GET_TOUCHED(mtouch->data));
 	input_report_abs(mtouch->input, ABS_X, MTOUCHUSB_GET_XC(mtouch->data));
 	input_report_abs(mtouch->input, ABS_Y,
 			 (raw_coordinates ? MTOUCHUSB_MAX_RAW_YC : MTOUCHUSB_MAX_CALIB_YC)
 			 - MTOUCHUSB_GET_YC(mtouch->data));
 	input_sync(mtouch->input);

 exit:
 	retval = usb_submit_urb(urb, GFP_ATOMIC);
 	if (retval)
 		err("%s - usb_submit_urb failed with result: %d",
 		    __FUNCTION__, retval);
 }

 static int mtouchusb_open(struct input_dev *input)
 {
 	struct mtouch_usb *mtouch = input->private;

 	mtouch->irq->dev = mtouch->udev;

 	if (usb_submit_urb(mtouch->irq, GFP_ATOMIC))
 		return -EIO;

 	return 0;
 }

 static void mtouchusb_close(struct input_dev *input)
 {
 	struct mtouch_usb *mtouch = input->private;

 	usb_kill_urb(mtouch->irq);
 }

 static int mtouchusb_alloc_buffers(struct usb_device *udev, struct mtouch_usb *mtouch)
 {
 	dbg("%s - called", __FUNCTION__);

 	mtouch->data = usb_buffer_alloc(udev, MTOUCHUSB_REPORT_DATA_SIZE,
 					SLAB_ATOMIC, &mtouch->data_dma);

 	if (!mtouch->data)
 		return -1;

 	return 0;
 }

 static void mtouchusb_free_buffers(struct usb_device *udev, struct mtouch_usb *mtouch)
 {
 	dbg("%s - called", __FUNCTION__);

 	if (mtouch->data)
 		usb_buffer_free(udev, MTOUCHUSB_REPORT_DATA_SIZE,
 				mtouch->data, mtouch->data_dma);
 }

 static int mtouchusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 {
 	struct mtouch_usb *mtouch;
 	struct input_dev *input_dev;
 	struct usb_host_interface *interface;
 	struct usb_endpoint_descriptor *endpoint;
 	struct usb_device *udev = interface_to_usbdev(intf);
 	int nRet;

 	dbg("%s - called", __FUNCTION__);

 	dbg("%s - setting interface", __FUNCTION__);
 	interface = intf->cur_altsetting;

 	dbg("%s - setting endpoint", __FUNCTION__);
 	endpoint = &interface->endpoint[0].desc;

 	mtouch = kzalloc(sizeof(struct mtouch_usb), GFP_KERNEL);
 	input_dev = input_allocate_device();
 	if (!mtouch || !input_dev) {
 		err("%s - Out of memory.", __FUNCTION__);
 		goto fail1;
 	}

 	dbg("%s - allocating buffers", __FUNCTION__);
 	if (mtouchusb_alloc_buffers(udev, mtouch))
 		goto fail2;

 	mtouch->udev = udev;
 	mtouch->input = input_dev;

 	if (udev->manufacturer)
 		strlcpy(mtouch->name, udev->manufacturer, sizeof(mtouch->name));

 	if (udev->product) {
 		if (udev->manufacturer)
 			strlcat(mtouch->name, " ", sizeof(mtouch->name));
 		strlcat(mtouch->name, udev->product, sizeof(mtouch->name));
 	}

 	if (!strlen(mtouch->name))
 		snprintf(mtouch->name, sizeof(mtouch->name),
 			"USB Touchscreen %04x:%04x",
 			le16_to_cpu(udev->descriptor.idVendor),
 			le16_to_cpu(udev->descriptor.idProduct));

 	usb_make_path(udev, mtouch->phys, sizeof(mtouch->phys));
 	strlcpy(mtouch->phys, "/input0", sizeof(mtouch->phys));

 	input_dev->name = mtouch->name;
 	input_dev->phys = mtouch->phys;
 	usb_to_input_id(udev, &input_dev->id);
 	input_dev->cdev.dev = &intf->dev;
 	input_dev->private = mtouch;

 	input_dev->open = mtouchusb_open;
 	input_dev->close = mtouchusb_close;

 	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 	input_set_abs_params(input_dev, ABS_X, MTOUCHUSB_MIN_XC,
 		raw_coordinates ? MTOUCHUSB_MAX_RAW_XC : MTOUCHUSB_MAX_CALIB_XC,
 				MTOUCHUSB_XC_FUZZ, MTOUCHUSB_XC_FLAT);
 	input_set_abs_params(input_dev, ABS_Y, MTOUCHUSB_MIN_YC,
 		raw_coordinates ? MTOUCHUSB_MAX_RAW_YC : MTOUCHUSB_MAX_CALIB_YC,
 		MTOUCHUSB_YC_FUZZ, MTOUCHUSB_YC_FLAT);

 	nRet = usb_control_msg(mtouch->udev, usb_rcvctrlpipe(udev, 0),
 			       MTOUCHUSB_RESET,
 			       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 			       1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 	dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 	    __FUNCTION__, nRet);

 	dbg("%s - usb_alloc_urb: mtouch->irq", __FUNCTION__);
 	mtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 	if (!mtouch->irq) {
 		dbg("%s - usb_alloc_urb failed: mtouch->irq", __FUNCTION__);
 		goto fail2;
 	}

 	dbg("%s - usb_fill_int_urb", __FUNCTION__);
 	usb_fill_int_urb(mtouch->irq, mtouch->udev,
 			 usb_rcvintpipe(mtouch->udev, 0x81),
 			 mtouch->data, MTOUCHUSB_REPORT_DATA_SIZE,
 			 mtouchusb_irq, mtouch, endpoint->bInterval);

 	dbg("%s - input_register_device", __FUNCTION__);
 	input_register_device(mtouch->input);

 	nRet = usb_control_msg(mtouch->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);
 	dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 	    __FUNCTION__, nRet);

 	usb_set_intfdata(intf, mtouch);
 	return 0;

 fail2:	mtouchusb_free_buffers(udev, mtouch);
 fail1:	input_free_device(input_dev);
 	kfree(mtouch);
 	return -ENOMEM;
 }

 static void mtouchusb_disconnect(struct usb_interface *intf)
 {
 	struct mtouch_usb *mtouch = usb_get_intfdata(intf);

 	dbg("%s - called", __FUNCTION__);
 	usb_set_intfdata(intf, NULL);
 	if (mtouch) {
 		dbg("%s - mtouch is initialized, cleaning up", __FUNCTION__);
 		usb_kill_urb(mtouch->irq);
 		input_unregister_device(mtouch->input);
 		usb_free_urb(mtouch->irq);
 		mtouchusb_free_buffers(interface_to_usbdev(intf), mtouch);
 		kfree(mtouch);
 	}
 }

 MODULE_DEVICE_TABLE(usb, mtouchusb_devices);

 static struct usb_driver mtouchusb_driver = {
 	.name		= "mtouchusb",
 	.probe		= mtouchusb_probe,
 	.disconnect	= mtouchusb_disconnect,
 	.id_table	= mtouchusb_devices,
 };

 static int __init mtouchusb_init(void)
 {
 	dbg("%s - called", __FUNCTION__);
 	return usb_register(&mtouchusb_driver);
 }

 static void __exit mtouchusb_cleanup(void)
 {
 	dbg("%s - called", __FUNCTION__);
 	usb_deregister(&mtouchusb_driver);
 }

 module_init(mtouchusb_init);
 module_exit(mtouchusb_cleanup);

 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
	/******************************************************************************
	* mtouchusb.c -- Driver for Microtouch (Now 3M) USB Touchscreens
	*
	* 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.
	*
	* Based upon original work by Radoslaw Garbacz (usb-support@ite.pl)
	* (http://freshmeat.net/projects/3mtouchscreendriver)
	*
	* History
	*
	* 0.3 & 0.4 2002 (TEJ) tejohnson@yahoo.com
	* Updated to 2.4.18, then 2.4.19
	* Old version still relied on stealing a minor
	*
	* 0.5 02/26/2004 (TEJ) tejohnson@yahoo.com
	* Complete rewrite using Linux Input in 2.6.3
	* Unfortunately no calibration support at this time
	*
	* 1.4 04/25/2004 (TEJ) tejohnson@yahoo.com
	* Changed reset from standard USB dev reset to vendor reset
	* Changed data sent to host from compensated to raw coordinates
	* Eliminated vendor/product module params
	* Performed multiple successful tests with an EXII-5010UC
	*
	* 1.5 02/27/2005 ddstreet@ieee.org
	* Added module parameter to select raw or hw-calibrated coordinate reporting
	*
	*****************************************************************************/

	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/usb/input.h>

	#define MTOUCHUSB_MIN_XC 0x0
	#define MTOUCHUSB_MAX_RAW_XC 0x4000
	#define MTOUCHUSB_MAX_CALIB_XC 0xffff
	#define MTOUCHUSB_XC_FUZZ 0x0
	#define MTOUCHUSB_XC_FLAT 0x0
	#define MTOUCHUSB_MIN_YC 0x0
	#define MTOUCHUSB_MAX_RAW_YC 0x4000
	#define MTOUCHUSB_MAX_CALIB_YC 0xffff
	#define MTOUCHUSB_YC_FUZZ 0x0
	#define MTOUCHUSB_YC_FLAT 0x0

	#define MTOUCHUSB_ASYNC_REPORT 1
	#define MTOUCHUSB_RESET 7
	#define MTOUCHUSB_REPORT_DATA_SIZE 11
	#define MTOUCHUSB_REQ_CTRLLR_ID 10

	#define MTOUCHUSB_GET_RAW_XC(data) (data[8]<<8 \| data[7])
	#define MTOUCHUSB_GET_CALIB_XC(data) (data[4]<<8 \| data[3])
	#define MTOUCHUSB_GET_RAW_YC(data) (data[10]<<8 \| data[9])
	#define MTOUCHUSB_GET_CALIB_YC(data) (data[6]<<8 \| data[5])
	#define MTOUCHUSB_GET_XC(data) (raw_coordinates ? \
	MTOUCHUSB_GET_RAW_XC(data) : \
	MTOUCHUSB_GET_CALIB_XC(data))
	#define MTOUCHUSB_GET_YC(data) (raw_coordinates ? \
	MTOUCHUSB_GET_RAW_YC(data) : \
	MTOUCHUSB_GET_CALIB_YC(data))
	#define MTOUCHUSB_GET_TOUCHED(data) ((data[2] & 0x40) ? 1:0)

	#define DRIVER_VERSION "v1.5"
	#define DRIVER_AUTHOR "Todd E. Johnson, tejohnson@yahoo.com"
	#define DRIVER_DESC "3M USB Touchscreen Driver"
	#define DRIVER_LICENSE "GPL"

	static int raw_coordinates = 1;

	module_param(raw_coordinates, bool, S_IRUGO \| S_IWUSR);
	MODULE_PARM_DESC(raw_coordinates, "report raw coordinate values (y, default) or hardware-calibrated coordinate values (n)");

	struct mtouch_usb {
	unsigned char *data;
	dma_addr_t data_dma;
	struct urb *irq;
	struct usb_device *udev;
	struct input_dev *input;
	char name[128];
	char phys[64];
	};

	static struct usb_device_id mtouchusb_devices[] = {
	{ USB_DEVICE(0x0596, 0x0001) },
	{ }
	};

	static void mtouchusb_irq(struct urb urb, struct pt_regs regs)
	{
	struct mtouch_usb *mtouch = urb->context;
	int retval;

	switch (urb->status) {
	case 0:
	/* success */
	break;
	case -ETIMEDOUT:
	/* this urb is timing out */
	dbg("%s - urb timed out - was the device unplugged?",
	__FUNCTION__);
	return;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
	/* this urb is terminated, clean up */
	dbg("%s - urb shutting down with status: %d",
	__FUNCTION__, urb->status);
	return;
	default:
	dbg("%s - nonzero urb status received: %d",
	__FUNCTION__, urb->status);
	goto exit;
	}

	input_regs(mtouch->input, regs);
	input_report_key(mtouch->input, BTN_TOUCH,
	MTOUCHUSB_GET_TOUCHED(mtouch->data));
	input_report_abs(mtouch->input, ABS_X, MTOUCHUSB_GET_XC(mtouch->data));
	input_report_abs(mtouch->input, ABS_Y,
	(raw_coordinates ? MTOUCHUSB_MAX_RAW_YC : MTOUCHUSB_MAX_CALIB_YC)
	- MTOUCHUSB_GET_YC(mtouch->data));
	input_sync(mtouch->input);

	exit:
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
	err("%s - usb_submit_urb failed with result: %d",
	__FUNCTION__, retval);
	}

	static int mtouchusb_open(struct input_dev *input)
	{
	struct mtouch_usb *mtouch = input->private;

	mtouch->irq->dev = mtouch->udev;

	if (usb_submit_urb(mtouch->irq, GFP_ATOMIC))
	return -EIO;

	return 0;
	}

	static void mtouchusb_close(struct input_dev *input)
	{
	struct mtouch_usb *mtouch = input->private;

	usb_kill_urb(mtouch->irq);
	}

	static int mtouchusb_alloc_buffers(struct usb_device udev, struct mtouch_usb mtouch)
	{
	dbg("%s - called", __FUNCTION__);

	mtouch->data = usb_buffer_alloc(udev, MTOUCHUSB_REPORT_DATA_SIZE,
	SLAB_ATOMIC, &mtouch->data_dma);

	if (!mtouch->data)
	return -1;

	return 0;
	}

	static void mtouchusb_free_buffers(struct usb_device udev, struct mtouch_usb mtouch)
	{
	dbg("%s - called", __FUNCTION__);

	if (mtouch->data)
	usb_buffer_free(udev, MTOUCHUSB_REPORT_DATA_SIZE,
	mtouch->data, mtouch->data_dma);
	}

	static int mtouchusb_probe(struct usb_interface intf, const struct usb_device_id id)
	{
	struct mtouch_usb *mtouch;
	struct input_dev *input_dev;
	struct usb_host_interface *interface;
	struct usb_endpoint_descriptor *endpoint;
	struct usb_device *udev = interface_to_usbdev(intf);
	int nRet;

	dbg("%s - called", __FUNCTION__);

	dbg("%s - setting interface", __FUNCTION__);
	interface = intf->cur_altsetting;

	dbg("%s - setting endpoint", __FUNCTION__);
	endpoint = &interface->endpoint[0].desc;

	mtouch = kzalloc(sizeof(struct mtouch_usb), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!mtouch \|\| !input_dev) {
	err("%s - Out of memory.", __FUNCTION__);
	goto fail1;
	}

	dbg("%s - allocating buffers", __FUNCTION__);
	if (mtouchusb_alloc_buffers(udev, mtouch))
	goto fail2;

	mtouch->udev = udev;
	mtouch->input = input_dev;

	if (udev->manufacturer)
	strlcpy(mtouch->name, udev->manufacturer, sizeof(mtouch->name));

	if (udev->product) {
	if (udev->manufacturer)
	strlcat(mtouch->name, " ", sizeof(mtouch->name));
	strlcat(mtouch->name, udev->product, sizeof(mtouch->name));
	}

	if (!strlen(mtouch->name))
	snprintf(mtouch->name, sizeof(mtouch->name),
	"USB Touchscreen %04x:%04x",
	le16_to_cpu(udev->descriptor.idVendor),
	le16_to_cpu(udev->descriptor.idProduct));

	usb_make_path(udev, mtouch->phys, sizeof(mtouch->phys));
	strlcpy(mtouch->phys, "/input0", sizeof(mtouch->phys));

	input_dev->name = mtouch->name;
	input_dev->phys = mtouch->phys;
	usb_to_input_id(udev, &input_dev->id);
	input_dev->cdev.dev = &intf->dev;
	input_dev->private = mtouch;

	input_dev->open = mtouchusb_open;
	input_dev->close = mtouchusb_close;

	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
	input_set_abs_params(input_dev, ABS_X, MTOUCHUSB_MIN_XC,
	raw_coordinates ? MTOUCHUSB_MAX_RAW_XC : MTOUCHUSB_MAX_CALIB_XC,
	MTOUCHUSB_XC_FUZZ, MTOUCHUSB_XC_FLAT);
	input_set_abs_params(input_dev, ABS_Y, MTOUCHUSB_MIN_YC,
	raw_coordinates ? MTOUCHUSB_MAX_RAW_YC : MTOUCHUSB_MAX_CALIB_YC,
	MTOUCHUSB_YC_FUZZ, MTOUCHUSB_YC_FLAT);

	nRet = usb_control_msg(mtouch->udev, usb_rcvctrlpipe(udev, 0),
	MTOUCHUSB_RESET,
	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
	dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes\|err: %d",
	__FUNCTION__, nRet);

	dbg("%s - usb_alloc_urb: mtouch->irq", __FUNCTION__);
	mtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
	if (!mtouch->irq) {
	dbg("%s - usb_alloc_urb failed: mtouch->irq", __FUNCTION__);
	goto fail2;
	}

	dbg("%s - usb_fill_int_urb", __FUNCTION__);
	usb_fill_int_urb(mtouch->irq, mtouch->udev,
	usb_rcvintpipe(mtouch->udev, 0x81),
	mtouch->data, MTOUCHUSB_REPORT_DATA_SIZE,
	mtouchusb_irq, mtouch, endpoint->bInterval);

	dbg("%s - input_register_device", __FUNCTION__);
	input_register_device(mtouch->input);

	nRet = usb_control_msg(mtouch->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);
	dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes\|err: %d",
	__FUNCTION__, nRet);

	usb_set_intfdata(intf, mtouch);
	return 0;

	fail2: mtouchusb_free_buffers(udev, mtouch);
	fail1: input_free_device(input_dev);
	kfree(mtouch);
	return -ENOMEM;
	}

	static void mtouchusb_disconnect(struct usb_interface *intf)
	{
	struct mtouch_usb *mtouch = usb_get_intfdata(intf);

	dbg("%s - called", __FUNCTION__);
	usb_set_intfdata(intf, NULL);
	if (mtouch) {
	dbg("%s - mtouch is initialized, cleaning up", __FUNCTION__);
	usb_kill_urb(mtouch->irq);
	input_unregister_device(mtouch->input);
	usb_free_urb(mtouch->irq);
	mtouchusb_free_buffers(interface_to_usbdev(intf), mtouch);
	kfree(mtouch);
	}
	}

	MODULE_DEVICE_TABLE(usb, mtouchusb_devices);

	static struct usb_driver mtouchusb_driver = {
	.name = "mtouchusb",
	.probe = mtouchusb_probe,
	.disconnect = mtouchusb_disconnect,
	.id_table = mtouchusb_devices,
	};

	static int __init mtouchusb_init(void)
	{
	dbg("%s - called", __FUNCTION__);
	return usb_register(&mtouchusb_driver);
	}

	static void __exit mtouchusb_cleanup(void)
	{
	dbg("%s - called", __FUNCTION__);
	usb_deregister(&mtouchusb_driver);
	}

	module_init(mtouchusb_init);
	module_exit(mtouchusb_cleanup);

	MODULE_AUTHOR(DRIVER_AUTHOR);
	MODULE_DESCRIPTION(DRIVER_DESC);
	MODULE_LICENSE("GPL");