[net-next-2.6.git] / drivers / usb / input / touchkitusb.c

/******************************************************************************
 * touchkitusb.c  --  Driver for eGalax TouchKit USB Touchscreens
 *
 * Copyright (C) 2004-2005 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.
 *
 * Based upon mtouchusb.c
 *
 *****************************************************************************/

//#define DEBUG

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

#define TOUCHKIT_MIN_XC			0x0
#define TOUCHKIT_MAX_XC			0x07ff
#define TOUCHKIT_XC_FUZZ		0x0
#define TOUCHKIT_XC_FLAT		0x0
#define TOUCHKIT_MIN_YC			0x0
#define TOUCHKIT_MAX_YC			0x07ff
#define TOUCHKIT_YC_FUZZ		0x0
#define TOUCHKIT_YC_FLAT		0x0
#define TOUCHKIT_REPORT_DATA_SIZE	16

#define TOUCHKIT_DOWN			0x01

#define TOUCHKIT_PKT_TYPE_MASK		0xFE
#define TOUCHKIT_PKT_TYPE_REPT		0x80
#define TOUCHKIT_PKT_TYPE_DIAG		0x0A

#define DRIVER_VERSION			"v0.1"
#define DRIVER_AUTHOR			"Daniel Ritz <daniel.ritz@gmx.ch>"
#define DRIVER_DESC			"eGalax TouchKit USB HID Touchscreen Driver"

static int swap_xy;
module_param(swap_xy, bool, 0644);
MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");

struct touchkit_usb {
	unsigned char *data;
	dma_addr_t data_dma;
	char buffer[TOUCHKIT_REPORT_DATA_SIZE];
	int buf_len;
	struct urb *irq;
	struct usb_device *udev;
	struct input_dev *input;
	char name[128];
	char phys[64];
};

static struct usb_device_id touchkit_devices[] = {
	{USB_DEVICE(0x3823, 0x0001)},
	{USB_DEVICE(0x0123, 0x0001)},
	{USB_DEVICE(0x0eef, 0x0001)},
	{USB_DEVICE(0x0eef, 0x0002)},
	{}
};

/* helpers to read the data */
static inline int touchkit_get_touched(char *data)
{
	return (data[0] & TOUCHKIT_DOWN) ? 1 : 0;
}

static inline int touchkit_get_x(char *data)
{
	return ((data[3] & 0x0F) << 7) | (data[4] & 0x7F);
}

static inline int touchkit_get_y(char *data)
{
	return ((data[1] & 0x0F) << 7) | (data[2] & 0x7F);
}


/* processes one input packet. */
static void touchkit_process_pkt(struct touchkit_usb *touchkit, char *pkt)
{
	int x, y;

	/* only process report packets */
	if ((pkt[0] & TOUCHKIT_PKT_TYPE_MASK) != TOUCHKIT_PKT_TYPE_REPT)
		return;

	if (swap_xy) {
		y = touchkit_get_x(pkt);
		x = touchkit_get_y(pkt);
	} else {
		x = touchkit_get_x(pkt);
		y = touchkit_get_y(pkt);
	}

	input_report_key(touchkit->input, BTN_TOUCH, touchkit_get_touched(pkt));
	input_report_abs(touchkit->input, ABS_X, x);
	input_report_abs(touchkit->input, ABS_Y, y);
	input_sync(touchkit->input);
}


static int touchkit_get_pkt_len(char *buf)
{
	switch (buf[0] & TOUCHKIT_PKT_TYPE_MASK) {
	case TOUCHKIT_PKT_TYPE_REPT:
		return 5;

	case TOUCHKIT_PKT_TYPE_DIAG:
		return buf[1] + 2;
	}

	return 0;
}

static void touchkit_process(struct touchkit_usb *touchkit, int len)
{
	char *buffer;
	int pkt_len, buf_len, pos;

	/* if the buffer contains data, append */
	if (unlikely(touchkit->buf_len)) {
		int tmp;

		/* if only 1 byte in buffer, add another one to get length */
		if (touchkit->buf_len == 1)
			touchkit->buffer[1] = touchkit->data[0];

		pkt_len = touchkit_get_pkt_len(touchkit->buffer);

		/* unknown packet: drop everything */
		if (!pkt_len)
			return;

		/* append, process */
		tmp = pkt_len - touchkit->buf_len;
		memcpy(touchkit->buffer + touchkit->buf_len, touchkit->data, tmp);
		touchkit_process_pkt(touchkit, touchkit->buffer);

		buffer = touchkit->data + tmp;
		buf_len = len - tmp;
	} else {
		buffer = touchkit->data;
		buf_len = len;
	}

	/* only one byte left in buffer */
	if (unlikely(buf_len == 1)) {
		touchkit->buffer[0] = buffer[0];
		touchkit->buf_len = 1;
		return;
	}

	/* loop over the buffer */
	pos = 0;
	while (pos < buf_len) {
		/* get packet len */
		pkt_len = touchkit_get_pkt_len(buffer + pos);

		/* unknown packet: drop everything */
		if (unlikely(!pkt_len))
			return;

		/* full packet: process */
		if (likely(pkt_len <= buf_len)) {
			touchkit_process_pkt(touchkit, buffer + pos);
		} else {
			/* incomplete packet: save in buffer */
			memcpy(touchkit->buffer, buffer + pos, buf_len - pos);
			touchkit->buf_len = buf_len - pos;
		}
		pos += pkt_len;
	}
}


static void touchkit_irq(struct urb *urb)
{
	struct touchkit_usb *touchkit = urb->context;
	int retval;

	switch (urb->status) {
	case 0:
		/* success */
		break;
	case -ETIME:
		/* 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;
	}

	touchkit_process(touchkit, urb->actual_length);

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

static int touchkit_open(struct input_dev *input)
{
	struct touchkit_usb *touchkit = input->private;

	touchkit->irq->dev = touchkit->udev;

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

	return 0;
}

static void touchkit_close(struct input_dev *input)
{
	struct touchkit_usb *touchkit = input->private;

	usb_kill_urb(touchkit->irq);
}

static int touchkit_alloc_buffers(struct usb_device *udev,
				  struct touchkit_usb *touchkit)
{
	touchkit->data = usb_buffer_alloc(udev, TOUCHKIT_REPORT_DATA_SIZE,
	                                  GFP_ATOMIC, &touchkit->data_dma);

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

	return 0;
}

static void touchkit_free_buffers(struct usb_device *udev,
				  struct touchkit_usb *touchkit)
{
	if (touchkit->data)
		usb_buffer_free(udev, TOUCHKIT_REPORT_DATA_SIZE,
		                touchkit->data, touchkit->data_dma);
}

static int touchkit_probe(struct usb_interface *intf,
			  const struct usb_device_id *id)
{
	struct touchkit_usb *touchkit;
	struct input_dev *input_dev;
	struct usb_host_interface *interface;
	struct usb_endpoint_descriptor *endpoint;
	struct usb_device *udev = interface_to_usbdev(intf);

	interface = intf->cur_altsetting;
	endpoint = &interface->endpoint[0].desc;

	touchkit = kzalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!touchkit || !input_dev)
		goto out_free;

	if (touchkit_alloc_buffers(udev, touchkit))
		goto out_free;

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

	touchkit->udev = udev;
	touchkit->input = input_dev;

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

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

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

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

	input_dev->name = touchkit->name;
	input_dev->phys = touchkit->phys;
	usb_to_input_id(udev, &input_dev->id);
	input_dev->cdev.dev = &intf->dev;
	input_dev->private = touchkit;
	input_dev->open = touchkit_open;
	input_dev->close = touchkit_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, TOUCHKIT_MIN_XC, TOUCHKIT_MAX_XC,
				TOUCHKIT_XC_FUZZ, TOUCHKIT_XC_FLAT);
	input_set_abs_params(input_dev, ABS_Y, TOUCHKIT_MIN_YC, TOUCHKIT_MAX_YC,
				TOUCHKIT_YC_FUZZ, TOUCHKIT_YC_FLAT);

	usb_fill_int_urb(touchkit->irq, touchkit->udev,
			 usb_rcvintpipe(touchkit->udev, 0x81),
			 touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
			 touchkit_irq, touchkit, endpoint->bInterval);

	touchkit->irq->transfer_dma = touchkit->data_dma;
	touchkit->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

	input_register_device(touchkit->input);

	usb_set_intfdata(intf, touchkit);
	return 0;

out_free_buffers:
	touchkit_free_buffers(udev, touchkit);
out_free:
	input_free_device(input_dev);
	kfree(touchkit);
	return -ENOMEM;
}

static void touchkit_disconnect(struct usb_interface *intf)
{
	struct touchkit_usb *touchkit = usb_get_intfdata(intf);

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

	if (!touchkit)
		return;

	dbg("%s - touchkit is initialized, cleaning up", __FUNCTION__);
	usb_set_intfdata(intf, NULL);
	usb_kill_urb(touchkit->irq);
	input_unregister_device(touchkit->input);
	usb_free_urb(touchkit->irq);
	touchkit_free_buffers(interface_to_usbdev(intf), touchkit);
	kfree(touchkit);
}

MODULE_DEVICE_TABLE(usb, touchkit_devices);

static struct usb_driver touchkit_driver = {
	.name		= "touchkitusb",
	.probe		= touchkit_probe,
	.disconnect	= touchkit_disconnect,
	.id_table	= touchkit_devices,
};

static int __init touchkit_init(void)
{
	return usb_register(&touchkit_driver);
}

static void __exit touchkit_cleanup(void)
{
	usb_deregister(&touchkit_driver);
}

module_init(touchkit_init);
module_exit(touchkit_cleanup);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/******************************************************************************
	2	* touchkitusb.c -- Driver for eGalax TouchKit USB Touchscreens
	3	*
5d320294	4	* Copyright (C) 2004-2005 by Daniel Ritz <daniel.ritz@gmx.ch>
1da177e4 LT	5	* Copyright (C) by Todd E. Johnson (mtouchusb.c)
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation; either version 2 of the
	10	* License, or (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*
	21	* Based upon mtouchusb.c
	22	*
	23	*****************************************************************************/
	24
	25	//#define DEBUG
	26
1da177e4 LT	27	#include <linux/kernel.h>
1da177e4 LT	28	#include <linux/slab.h>
1da177e4 LT	29	#include <linux/module.h>
1da177e4 LT	30	#include <linux/init.h>
ae0dadcf	31	#include <linux/usb/input.h>
1da177e4 LT	32
	33	#define TOUCHKIT_MIN_XC 0x0
	34	#define TOUCHKIT_MAX_XC 0x07ff
	35	#define TOUCHKIT_XC_FUZZ 0x0
	36	#define TOUCHKIT_XC_FLAT 0x0
	37	#define TOUCHKIT_MIN_YC 0x0
	38	#define TOUCHKIT_MAX_YC 0x07ff
	39	#define TOUCHKIT_YC_FUZZ 0x0
	40	#define TOUCHKIT_YC_FLAT 0x0
5d320294	41	#define TOUCHKIT_REPORT_DATA_SIZE 16
1da177e4 LT	42
1da177e4 LT	43	#define TOUCHKIT_DOWN 0x01
1da177e4	44
5d320294 DR	45	#define TOUCHKIT_PKT_TYPE_MASK 0xFE
	46	#define TOUCHKIT_PKT_TYPE_REPT 0x80
	47	#define TOUCHKIT_PKT_TYPE_DIAG 0x0A
1da177e4 LT	48
	49	#define DRIVER_VERSION "v0.1"
	50	#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
	51	#define DRIVER_DESC "eGalax TouchKit USB HID Touchscreen Driver"
	52
	53	static int swap_xy;
	54	module_param(swap_xy, bool, 0644);
	55	MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
	56
	57	struct touchkit_usb {
	58	unsigned char *data;
	59	dma_addr_t data_dma;
5d320294 DR	60	char buffer[TOUCHKIT_REPORT_DATA_SIZE];
5d320294 DR	61	int buf_len;
1da177e4 LT	62	struct urb *irq;
1da177e4 LT	63	struct usb_device *udev;
c5b7c7c3	64	struct input_dev *input;
1da177e4 LT	65	char name[128];
	66	char phys[64];
	67	};
	68
	69	static struct usb_device_id touchkit_devices[] = {
	70	{USB_DEVICE(0x3823, 0x0001)},
3f8c03ee	71	{USB_DEVICE(0x0123, 0x0001)},
1da177e4	72	{USB_DEVICE(0x0eef, 0x0001)},
3f8c03ee	73	{USB_DEVICE(0x0eef, 0x0002)},
1da177e4 LT	74	{}
	75	};
	76
5d320294 DR	77	/* helpers to read the data */
	78	static inline int touchkit_get_touched(char *data)
	79	{
	80	return (data[0] & TOUCHKIT_DOWN) ? 1 : 0;
	81	}
	82
	83	static inline int touchkit_get_x(char *data)
	84	{
	85	return ((data[3] & 0x0F) << 7) \| (data[4] & 0x7F);
	86	}
	87
	88	static inline int touchkit_get_y(char *data)
	89	{
	90	return ((data[1] & 0x0F) << 7) \| (data[2] & 0x7F);
	91	}
	92
	93
	94	/* processes one input packet. */
7d12e780	95	static void touchkit_process_pkt(struct touchkit_usb touchkit, char pkt)
5d320294 DR	96	{
	97	int x, y;
	98
	99	/* only process report packets */
	100	if ((pkt[0] & TOUCHKIT_PKT_TYPE_MASK) != TOUCHKIT_PKT_TYPE_REPT)
	101	return;
	102
	103	if (swap_xy) {
	104	y = touchkit_get_x(pkt);
	105	x = touchkit_get_y(pkt);
	106	} else {
	107	x = touchkit_get_x(pkt);
	108	y = touchkit_get_y(pkt);
	109	}
	110
5d320294 DR	111	input_report_key(touchkit->input, BTN_TOUCH, touchkit_get_touched(pkt));
	112	input_report_abs(touchkit->input, ABS_X, x);
	113	input_report_abs(touchkit->input, ABS_Y, y);
	114	input_sync(touchkit->input);
	115	}
	116
	117
	118	static int touchkit_get_pkt_len(char *buf)
	119	{
	120	switch (buf[0] & TOUCHKIT_PKT_TYPE_MASK) {
	121	case TOUCHKIT_PKT_TYPE_REPT:
	122	return 5;
	123
	124	case TOUCHKIT_PKT_TYPE_DIAG:
	125	return buf[1] + 2;
	126	}
	127
	128	return 0;
	129	}
	130
7d12e780	131	static void touchkit_process(struct touchkit_usb *touchkit, int len)
5d320294 DR	132	{
	133	char *buffer;
	134	int pkt_len, buf_len, pos;
	135
	136	/* if the buffer contains data, append */
	137	if (unlikely(touchkit->buf_len)) {
	138	int tmp;
	139
	140	/* if only 1 byte in buffer, add another one to get length */
	141	if (touchkit->buf_len == 1)
	142	touchkit->buffer[1] = touchkit->data[0];
	143
	144	pkt_len = touchkit_get_pkt_len(touchkit->buffer);
	145
	146	/* unknown packet: drop everything */
	147	if (!pkt_len)
	148	return;
	149
	150	/* append, process */
	151	tmp = pkt_len - touchkit->buf_len;
	152	memcpy(touchkit->buffer + touchkit->buf_len, touchkit->data, tmp);
7d12e780	153	touchkit_process_pkt(touchkit, touchkit->buffer);
5d320294 DR	154
	155	buffer = touchkit->data + tmp;
	156	buf_len = len - tmp;
	157	} else {
	158	buffer = touchkit->data;
	159	buf_len = len;
	160	}
	161
	162	/* only one byte left in buffer */
	163	if (unlikely(buf_len == 1)) {
	164	touchkit->buffer[0] = buffer[0];
	165	touchkit->buf_len = 1;
	166	return;
	167	}
	168
	169	/* loop over the buffer */
	170	pos = 0;
	171	while (pos < buf_len) {
	172	/* get packet len */
	173	pkt_len = touchkit_get_pkt_len(buffer + pos);
	174
	175	/* unknown packet: drop everything */
	176	if (unlikely(!pkt_len))
	177	return;
	178
	179	/* full packet: process */
	180	if (likely(pkt_len <= buf_len)) {
7d12e780	181	touchkit_process_pkt(touchkit, buffer + pos);
5d320294 DR	182	} else {
	183	/* incomplete packet: save in buffer */
	184	memcpy(touchkit->buffer, buffer + pos, buf_len - pos);
	185	touchkit->buf_len = buf_len - pos;
	186	}
	187	pos += pkt_len;
	188	}
	189	}
	190
	191
7d12e780	192	static void touchkit_irq(struct urb *urb)
1da177e4 LT	193	{
	194	struct touchkit_usb *touchkit = urb->context;
	195	int retval;
1da177e4 LT	196
	197	switch (urb->status) {
	198	case 0:
	199	/* success */
	200	break;
38e2bfc9	201	case -ETIME:
1da177e4 LT	202	/* this urb is timing out */
	203	dbg("%s - urb timed out - was the device unplugged?",
	204	__FUNCTION__);
	205	return;
	206	case -ECONNRESET:
	207	case -ENOENT:
	208	case -ESHUTDOWN:
	209	/* this urb is terminated, clean up */
	210	dbg("%s - urb shutting down with status: %d",
	211	__FUNCTION__, urb->status);
	212	return;
	213	default:
	214	dbg("%s - nonzero urb status received: %d",
	215	__FUNCTION__, urb->status);
	216	goto exit;
	217	}
	218
7d12e780	219	touchkit_process(touchkit, urb->actual_length);
1da177e4 LT	220
	221	exit:
	222	retval = usb_submit_urb(urb, GFP_ATOMIC);
	223	if (retval)
	224	err("%s - usb_submit_urb failed with result: %d",
	225	__FUNCTION__, retval);
	226	}
	227
	228	static int touchkit_open(struct input_dev *input)
	229	{
	230	struct touchkit_usb *touchkit = input->private;
	231
1da177e4 LT	232	touchkit->irq->dev = touchkit->udev;
1da177e4 LT	233
65cde54b	234	if (usb_submit_urb(touchkit->irq, GFP_ATOMIC))
1da177e4	235	return -EIO;
1da177e4 LT	236
	237	return 0;
	238	}
	239
	240	static void touchkit_close(struct input_dev *input)
	241	{
	242	struct touchkit_usb *touchkit = input->private;
	243
65cde54b	244	usb_kill_urb(touchkit->irq);
1da177e4 LT	245	}
	246
	247	static int touchkit_alloc_buffers(struct usb_device *udev,
	248	struct touchkit_usb *touchkit)
	249	{
	250	touchkit->data = usb_buffer_alloc(udev, TOUCHKIT_REPORT_DATA_SIZE,
54e6ecb2	251	GFP_ATOMIC, &touchkit->data_dma);
1da177e4 LT	252
	253	if (!touchkit->data)
	254	return -1;
	255
	256	return 0;
	257	}
	258
	259	static void touchkit_free_buffers(struct usb_device *udev,
	260	struct touchkit_usb *touchkit)
	261	{
	262	if (touchkit->data)
	263	usb_buffer_free(udev, TOUCHKIT_REPORT_DATA_SIZE,
	264	touchkit->data, touchkit->data_dma);
	265	}
	266
	267	static int touchkit_probe(struct usb_interface *intf,
	268	const struct usb_device_id *id)
	269	{
1da177e4	270	struct touchkit_usb *touchkit;
c5b7c7c3	271	struct input_dev *input_dev;
1da177e4 LT	272	struct usb_host_interface *interface;
	273	struct usb_endpoint_descriptor *endpoint;
	274	struct usb_device *udev = interface_to_usbdev(intf);
1da177e4 LT	275
	276	interface = intf->cur_altsetting;
	277	endpoint = &interface->endpoint[0].desc;
	278
c5b7c7c3 DT	279	touchkit = kzalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
	280	input_dev = input_allocate_device();
	281	if (!touchkit \|\| !input_dev)
1da177e4	282	goto out_free;
1da177e4	283
c5b7c7c3 DT	284	if (touchkit_alloc_buffers(udev, touchkit))
c5b7c7c3 DT	285	goto out_free;
1da177e4 LT	286
	287	touchkit->irq = usb_alloc_urb(0, GFP_KERNEL);
	288	if (!touchkit->irq) {
	289	dbg("%s - usb_alloc_urb failed: touchkit->irq", __FUNCTION__);
1da177e4 LT	290	goto out_free_buffers;
	291	}
	292
c5b7c7c3 DT	293	touchkit->udev = udev;
	294	touchkit->input = input_dev;
	295
	296	if (udev->manufacturer)
	297	strlcpy(touchkit->name, udev->manufacturer, sizeof(touchkit->name));
	298
	299	if (udev->product) {
	300	if (udev->manufacturer)
	301	strlcat(touchkit->name, " ", sizeof(touchkit->name));
	302	strlcat(touchkit->name, udev->product, sizeof(touchkit->name));
	303	}
	304
	305	if (!strlen(touchkit->name))
	306	snprintf(touchkit->name, sizeof(touchkit->name),
	307	"USB Touchscreen %04x:%04x",
	308	le16_to_cpu(udev->descriptor.idVendor),
	309	le16_to_cpu(udev->descriptor.idProduct));
	310
	311	usb_make_path(udev, touchkit->phys, sizeof(touchkit->phys));
	312	strlcpy(touchkit->phys, "/input0", sizeof(touchkit->phys));
	313
	314	input_dev->name = touchkit->name;
	315	input_dev->phys = touchkit->phys;
	316	usb_to_input_id(udev, &input_dev->id);
	317	input_dev->cdev.dev = &intf->dev;
	318	input_dev->private = touchkit;
	319	input_dev->open = touchkit_open;
	320	input_dev->close = touchkit_close;
	321
	322	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
	323	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
	324	input_set_abs_params(input_dev, ABS_X, TOUCHKIT_MIN_XC, TOUCHKIT_MAX_XC,
	325	TOUCHKIT_XC_FUZZ, TOUCHKIT_XC_FLAT);
	326	input_set_abs_params(input_dev, ABS_Y, TOUCHKIT_MIN_YC, TOUCHKIT_MAX_YC,
	327	TOUCHKIT_YC_FUZZ, TOUCHKIT_YC_FLAT);
	328
1da177e4	329	usb_fill_int_urb(touchkit->irq, touchkit->udev,
c5b7c7c3 DT	330	usb_rcvintpipe(touchkit->udev, 0x81),
	331	touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
	332	touchkit_irq, touchkit, endpoint->bInterval);
1da177e4	333
a001100d JS	334	touchkit->irq->transfer_dma = touchkit->data_dma;
	335	touchkit->irq->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;
	336
c5b7c7c3	337	input_register_device(touchkit->input);
1da177e4	338
1da177e4	339	usb_set_intfdata(intf, touchkit);
1da177e4 LT	340	return 0;
	341
	342	out_free_buffers:
	343	touchkit_free_buffers(udev, touchkit);
	344	out_free:
c5b7c7c3	345	input_free_device(input_dev);
1da177e4	346	kfree(touchkit);
c5b7c7c3	347	return -ENOMEM;
1da177e4 LT	348	}
	349
	350	static void touchkit_disconnect(struct usb_interface *intf)
	351	{
	352	struct touchkit_usb *touchkit = usb_get_intfdata(intf);
	353
	354	dbg("%s - called", __FUNCTION__);
	355
	356	if (!touchkit)
	357	return;
	358
	359	dbg("%s - touchkit is initialized, cleaning up", __FUNCTION__);
	360	usb_set_intfdata(intf, NULL);
1da177e4	361	usb_kill_urb(touchkit->irq);
c5b7c7c3	362	input_unregister_device(touchkit->input);
1da177e4 LT	363	usb_free_urb(touchkit->irq);
	364	touchkit_free_buffers(interface_to_usbdev(intf), touchkit);
	365	kfree(touchkit);
	366	}
	367
	368	MODULE_DEVICE_TABLE(usb, touchkit_devices);
	369
	370	static struct usb_driver touchkit_driver = {
1da177e4 LT	371	.name = "touchkitusb",
	372	.probe = touchkit_probe,
	373	.disconnect = touchkit_disconnect,
	374	.id_table = touchkit_devices,
	375	};
	376
	377	static int __init touchkit_init(void)
	378	{
	379	return usb_register(&touchkit_driver);
	380	}
	381
	382	static void __exit touchkit_cleanup(void)
	383	{
	384	usb_deregister(&touchkit_driver);
	385	}
	386
	387	module_init(touchkit_init);
	388	module_exit(touchkit_cleanup);
	389
	390	MODULE_AUTHOR(DRIVER_AUTHOR);
	391	MODULE_DESCRIPTION(DRIVER_DESC);
	392	MODULE_LICENSE("GPL");