[deliverable/linux.git] / drivers / input / tablet / hanwang.c

/*
 *  USB Hanwang tablet support
 *
 *  Copyright (c) 2010 Xing Wei <weixing@hanwang.com.cn>
 *
 */

/*
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

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

#define DRIVER_AUTHOR   "Xing Wei <weixing@hanwang.com.cn>"
#define DRIVER_DESC     "USB Hanwang tablet driver"
#define DRIVER_LICENSE  "GPL"

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE(DRIVER_LICENSE);

#define USB_VENDOR_ID_HANWANG		0x0b57
#define HANWANG_TABLET_INT_CLASS	0x0003
#define HANWANG_TABLET_INT_SUB_CLASS	0x0001
#define HANWANG_TABLET_INT_PROTOCOL	0x0002

#define ART_MASTERIII_PKGLEN_MAX	10

/* device IDs */
#define STYLUS_DEVICE_ID	0x02
#define TOUCH_DEVICE_ID		0x03
#define CURSOR_DEVICE_ID	0x06
#define ERASER_DEVICE_ID	0x0A
#define PAD_DEVICE_ID		0x0F

/* match vendor and interface info  */
#define HANWANG_TABLET_DEVICE(vend, cl, sc, pr) \
	.match_flags = USB_DEVICE_ID_MATCH_VENDOR \
		| USB_DEVICE_ID_MATCH_INT_INFO, \
	.idVendor = (vend), \
	.bInterfaceClass = (cl), \
	.bInterfaceSubClass = (sc), \
	.bInterfaceProtocol = (pr)

struct hanwang {
	unsigned char *data;
	dma_addr_t data_dma;
	struct input_dev *dev;
	struct usb_device *usbdev;
	struct urb *irq;
	const struct hanwang_features *features;
	unsigned int current_tool;
	unsigned int current_id;
	char name[64];
	char phys[32];
};

struct hanwang_features {
	unsigned short pid;
	char *name;
	int pkg_len;
	int max_x;
	int max_y;
	int max_tilt_x;
	int max_tilt_y;
	int max_pressure;
};

static const struct hanwang_features features_array[] = {
	{ 0x8528, "Hanwang Art Master III 0906",
	  ART_MASTERIII_PKGLEN_MAX, 0x5757, 0x3692, 0x3f, 0x7f, 2048 },
	{ 0x8529, "Hanwang Art Master III 0604",
	  ART_MASTERIII_PKGLEN_MAX, 0x3d84, 0x2672, 0x3f, 0x7f, 2048 },
	{ 0x852a, "Hanwang Art Master III 1308",
	  ART_MASTERIII_PKGLEN_MAX, 0x7f00, 0x4f60, 0x3f, 0x7f, 2048 },
};

static const int hw_eventtypes[] = {
	EV_KEY, EV_ABS, EV_MSC,
};

static const int hw_absevents[] = {
	ABS_X, ABS_Y, ABS_TILT_X, ABS_TILT_Y, ABS_WHEEL,
	ABS_PRESSURE, ABS_MISC,
};

static const int hw_btnevents[] = {
	BTN_STYLUS, BTN_STYLUS2, BTN_TOOL_PEN, BTN_TOOL_RUBBER,
	BTN_TOOL_MOUSE, BTN_TOOL_FINGER,
	BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8,
};

static const int hw_mscevents[] = {
	MSC_SERIAL,
};

static void hanwang_parse_packet(struct hanwang *hanwang)
{
	unsigned char *data = hanwang->data;
	struct input_dev *input_dev = hanwang->dev;
	struct usb_device *dev = hanwang->usbdev;
	int i;

	switch (data[0]) {
	case 0x02:	/* data packet */
		switch (data[1]) {
		case 0x80:	/* tool prox out */
			hanwang->current_id = 0;
			input_report_key(input_dev, hanwang->current_tool, 0);
			break;

		case 0xc2:	/* first time tool prox in */
			switch (data[3] & 0xf0) {
			case 0x20:
				hanwang->current_id = STYLUS_DEVICE_ID;
				hanwang->current_tool = BTN_TOOL_PEN;
				input_report_key(input_dev, BTN_TOOL_PEN, 1);
				break;
			case 0xa0:
				hanwang->current_id = ERASER_DEVICE_ID;
				hanwang->current_tool = BTN_TOOL_RUBBER;
				input_report_key(input_dev, BTN_TOOL_RUBBER, 1);
				break;
			default:
				hanwang->current_id = 0;
				dev_dbg(&dev->dev,
					"unknown tablet tool %02x ", data[0]);
				break;
			}
			break;

		default:	/* tool data packet */
			input_report_abs(input_dev, ABS_X,
					 (data[2] << 8) | data[3]);
			input_report_abs(input_dev, ABS_Y,
					 (data[4] << 8) | data[5]);
			input_report_abs(input_dev, ABS_PRESSURE,
					 (data[6] << 3) |
					 ((data[7] & 0xc0) >> 5) |
					 (data[1] & 0x01));
			input_report_abs(input_dev, ABS_TILT_X, data[7] & 0x3f);
			input_report_abs(input_dev, ABS_TILT_Y, data[8] & 0x7f);
			input_report_key(input_dev, BTN_STYLUS, data[1] & 0x02);
			input_report_key(input_dev, BTN_STYLUS2, data[1] & 0x04);
			break;
		}
		input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
		input_event(input_dev, EV_MSC, MSC_SERIAL,
				hanwang->features->pid);
		break;

	case 0x0c:
		/* roll wheel */
		hanwang->current_id = PAD_DEVICE_ID;
		input_report_key(input_dev, BTN_TOOL_FINGER, data[1] ||
						data[2] || data[3]);
		input_report_abs(input_dev, ABS_WHEEL, data[1]);
		input_report_key(input_dev, BTN_0, data[2]);
		for (i = 0; i < 8; i++)
			input_report_key(input_dev,
					 BTN_1 + i, data[3] & (1 << i));
		input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
		input_event(input_dev, EV_MSC, MSC_SERIAL, 0xffffffff);
		break;

	default:
		dev_dbg(&dev->dev, "error packet  %02x ", data[0]);
		break;
	}

	input_sync(input_dev);
}

static void hanwang_irq(struct urb *urb)
{
	struct hanwang *hanwang = urb->context;
	struct usb_device *dev = hanwang->usbdev;
	int retval;

	switch (urb->status) {
	case 0:
		/* success */;
		hanwang_parse_packet(hanwang);
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
		dev_err(&dev->dev, "%s - urb shutting down with status: %d",
			__func__, urb->status);
		return;
	default:
		dev_err(&dev->dev, "%s - nonzero urb status received: %d",
			__func__, urb->status);
		break;
	}

	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
		dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d",
			__func__, retval);
}

static int hanwang_open(struct input_dev *dev)
{
	struct hanwang *hanwang = input_get_drvdata(dev);

	hanwang->irq->dev = hanwang->usbdev;
	if (usb_submit_urb(hanwang->irq, GFP_KERNEL))
		return -EIO;

	return 0;
}

static void hanwang_close(struct input_dev *dev)
{
	struct hanwang *hanwang = input_get_drvdata(dev);

	usb_kill_urb(hanwang->irq);
}

static bool get_features(struct usb_device *dev, struct hanwang *hanwang)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(features_array); i++) {
		if (le16_to_cpu(dev->descriptor.idProduct) ==
				features_array[i].pid) {
			hanwang->features = &features_array[i];
			return true;
		}
	}

	return false;
}


static int hanwang_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	struct usb_device *dev = interface_to_usbdev(intf);
	struct usb_endpoint_descriptor *endpoint;
	struct hanwang *hanwang;
	struct input_dev *input_dev;
	int error;
	int i;

	hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!hanwang || !input_dev) {
		error = -ENOMEM;
		goto fail1;
	}

	if (!get_features(dev, hanwang)) {
		error = -ENXIO;
		goto fail1;
	}

	hanwang->data = usb_alloc_coherent(dev, hanwang->features->pkg_len,
					GFP_KERNEL, &hanwang->data_dma);
	if (!hanwang->data) {
		error = -ENOMEM;
		goto fail1;
	}

	hanwang->irq = usb_alloc_urb(0, GFP_KERNEL);
	if (!hanwang->irq) {
		error = -ENOMEM;
		goto fail2;
	}

	hanwang->usbdev = dev;
	hanwang->dev = input_dev;

	usb_make_path(dev, hanwang->phys, sizeof(hanwang->phys));
	strlcat(hanwang->phys, "/input0", sizeof(hanwang->phys));

	strlcpy(hanwang->name, hanwang->features->name, sizeof(hanwang->name));
	input_dev->name = hanwang->name;
	input_dev->phys = hanwang->phys;
	usb_to_input_id(dev, &input_dev->id);
	input_dev->dev.parent = &intf->dev;

	input_set_drvdata(input_dev, hanwang);

	input_dev->open = hanwang_open;
	input_dev->close = hanwang_close;

	for (i = 0; i < ARRAY_SIZE(hw_eventtypes); ++i)
		__set_bit(hw_eventtypes[i], input_dev->evbit);

	for (i = 0; i < ARRAY_SIZE(hw_absevents); ++i)
		__set_bit(hw_absevents[i], input_dev->absbit);

	for (i = 0; i < ARRAY_SIZE(hw_btnevents); ++i)
		__set_bit(hw_btnevents[i], input_dev->keybit);

	for (i = 0; i < ARRAY_SIZE(hw_mscevents); ++i)
		__set_bit(hw_mscevents[i], input_dev->mscbit);

	input_set_abs_params(input_dev, ABS_X,
			     0, hanwang->features->max_x, 4, 0);
	input_set_abs_params(input_dev, ABS_Y,
			     0, hanwang->features->max_y, 4, 0);
	input_set_abs_params(input_dev, ABS_TILT_X,
			     0, hanwang->features->max_tilt_x, 0, 0);
	input_set_abs_params(input_dev, ABS_TILT_Y,
			     0, hanwang->features->max_tilt_y, 0, 0);
	input_set_abs_params(input_dev, ABS_PRESSURE,
			     0, hanwang->features->max_pressure, 0, 0);

	endpoint = &intf->cur_altsetting->endpoint[0].desc;
	usb_fill_int_urb(hanwang->irq, dev,
			usb_rcvintpipe(dev, endpoint->bEndpointAddress),
			hanwang->data, hanwang->features->pkg_len,
			hanwang_irq, hanwang, endpoint->bInterval);
	hanwang->irq->transfer_dma = hanwang->data_dma;
	hanwang->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

	error = input_register_device(hanwang->dev);
	if (error)
		goto fail3;

	usb_set_intfdata(intf, hanwang);

	return 0;

 fail3:	usb_free_urb(hanwang->irq);
 fail2:	usb_free_coherent(dev, hanwang->features->pkg_len,
			hanwang->data, hanwang->data_dma);
 fail1:	input_free_device(input_dev);
	kfree(hanwang);
	return error;

}

static void hanwang_disconnect(struct usb_interface *intf)
{
	struct hanwang *hanwang = usb_get_intfdata(intf);

	input_unregister_device(hanwang->dev);
	usb_free_urb(hanwang->irq);
	usb_free_coherent(interface_to_usbdev(intf),
			hanwang->features->pkg_len, hanwang->data,
			hanwang->data_dma);
	kfree(hanwang);
	usb_set_intfdata(intf, NULL);
}

static const struct usb_device_id hanwang_ids[] = {
	{ HANWANG_TABLET_DEVICE(USB_VENDOR_ID_HANWANG, HANWANG_TABLET_INT_CLASS,
		HANWANG_TABLET_INT_SUB_CLASS, HANWANG_TABLET_INT_PROTOCOL) },
	{}
};

MODULE_DEVICE_TABLE(usb, hanwang_ids);

static struct usb_driver hanwang_driver = {
	.name		= "hanwang",
	.probe		= hanwang_probe,
	.disconnect	= hanwang_disconnect,
	.id_table	= hanwang_ids,
};

static int __init hanwang_init(void)
{
	return usb_register(&hanwang_driver);
}

static void __exit hanwang_exit(void)
{
	usb_deregister(&hanwang_driver);
}

module_init(hanwang_init);
module_exit(hanwang_exit);
Commit	Line	Data
bba5394a XW	1	/*
	2	* USB Hanwang tablet support
	3	*
	4	* Copyright (c) 2010 Xing Wei <weixing@hanwang.com.cn>
	5	*
	6	*/
	7
	8	/*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*
	23	*/
	24
	25	#include <linux/types.h>
	26	#include <linux/kernel.h>
	27	#include <linux/slab.h>
	28	#include <linux/module.h>
	29	#include <linux/init.h>
	30	#include <linux/usb/input.h>
	31
	32	#define DRIVER_AUTHOR "Xing Wei <weixing@hanwang.com.cn>"
	33	#define DRIVER_DESC "USB Hanwang tablet driver"
	34	#define DRIVER_LICENSE "GPL"
	35
	36	MODULE_AUTHOR(DRIVER_AUTHOR);
	37	MODULE_DESCRIPTION(DRIVER_DESC);
	38	MODULE_LICENSE(DRIVER_LICENSE);
	39
	40	#define USB_VENDOR_ID_HANWANG 0x0b57
	41	#define HANWANG_TABLET_INT_CLASS 0x0003
	42	#define HANWANG_TABLET_INT_SUB_CLASS 0x0001
	43	#define HANWANG_TABLET_INT_PROTOCOL 0x0002
	44
	45	#define ART_MASTERIII_PKGLEN_MAX 10
	46
24dd3b58 XW	47	/* device IDs */
	48	#define STYLUS_DEVICE_ID 0x02
	49	#define TOUCH_DEVICE_ID 0x03
	50	#define CURSOR_DEVICE_ID 0x06
	51	#define ERASER_DEVICE_ID 0x0A
	52	#define PAD_DEVICE_ID 0x0F
	53
bba5394a XW	54	/* match vendor and interface info */
	55	#define HANWANG_TABLET_DEVICE(vend, cl, sc, pr) \
	56	.match_flags = USB_DEVICE_ID_MATCH_VENDOR \
	57	\| USB_DEVICE_ID_MATCH_INT_INFO, \
	58	.idVendor = (vend), \
	59	.bInterfaceClass = (cl), \
	60	.bInterfaceSubClass = (sc), \
	61	.bInterfaceProtocol = (pr)
	62
	63	struct hanwang {
	64	unsigned char *data;
	65	dma_addr_t data_dma;
	66	struct input_dev *dev;
	67	struct usb_device *usbdev;
	68	struct urb *irq;
	69	const struct hanwang_features *features;
	70	unsigned int current_tool;
24dd3b58	71	unsigned int current_id;
bba5394a XW	72	char name[64];
	73	char phys[32];
	74	};
	75
	76	struct hanwang_features {
	77	unsigned short pid;
	78	char *name;
	79	int pkg_len;
	80	int max_x;
	81	int max_y;
	82	int max_tilt_x;
	83	int max_tilt_y;
	84	int max_pressure;
	85	};
	86
	87	static const struct hanwang_features features_array[] = {
	88	{ 0x8528, "Hanwang Art Master III 0906",
	89	ART_MASTERIII_PKGLEN_MAX, 0x5757, 0x3692, 0x3f, 0x7f, 2048 },
	90	{ 0x8529, "Hanwang Art Master III 0604",
	91	ART_MASTERIII_PKGLEN_MAX, 0x3d84, 0x2672, 0x3f, 0x7f, 2048 },
	92	{ 0x852a, "Hanwang Art Master III 1308",
	93	ART_MASTERIII_PKGLEN_MAX, 0x7f00, 0x4f60, 0x3f, 0x7f, 2048 },
	94	};
	95
	96	static const int hw_eventtypes[] = {
24dd3b58	97	EV_KEY, EV_ABS, EV_MSC,
bba5394a XW	98	};
	99
	100	static const int hw_absevents[] = {
24dd3b58 XW	101	ABS_X, ABS_Y, ABS_TILT_X, ABS_TILT_Y, ABS_WHEEL,
24dd3b58 XW	102	ABS_PRESSURE, ABS_MISC,
bba5394a XW	103	};
	104
	105	static const int hw_btnevents[] = {
24dd3b58 XW	106	BTN_STYLUS, BTN_STYLUS2, BTN_TOOL_PEN, BTN_TOOL_RUBBER,
	107	BTN_TOOL_MOUSE, BTN_TOOL_FINGER,
	108	BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8,
	109	};
	110
	111	static const int hw_mscevents[] = {
	112	MSC_SERIAL,
bba5394a XW	113	};
	114
	115	static void hanwang_parse_packet(struct hanwang *hanwang)
	116	{
	117	unsigned char *data = hanwang->data;
	118	struct input_dev *input_dev = hanwang->dev;
	119	struct usb_device *dev = hanwang->usbdev;
	120	int i;
	121
	122	switch (data[0]) {
	123	case 0x02: /* data packet */
	124	switch (data[1]) {
	125	case 0x80: /* tool prox out */
24dd3b58	126	hanwang->current_id = 0;
bba5394a XW	127	input_report_key(input_dev, hanwang->current_tool, 0);
	128	break;
	129
	130	case 0xc2: /* first time tool prox in */
	131	switch (data[3] & 0xf0) {
	132	case 0x20:
24dd3b58	133	hanwang->current_id = STYLUS_DEVICE_ID;
bba5394a XW	134	hanwang->current_tool = BTN_TOOL_PEN;
	135	input_report_key(input_dev, BTN_TOOL_PEN, 1);
	136	break;
	137	case 0xa0:
24dd3b58	138	hanwang->current_id = ERASER_DEVICE_ID;
bba5394a XW	139	hanwang->current_tool = BTN_TOOL_RUBBER;
	140	input_report_key(input_dev, BTN_TOOL_RUBBER, 1);
	141	break;
	142	default:
24dd3b58	143	hanwang->current_id = 0;
bba5394a XW	144	dev_dbg(&dev->dev,
	145	"unknown tablet tool %02x ", data[0]);
	146	break;
	147	}
	148	break;
	149
	150	default: /* tool data packet */
	151	input_report_abs(input_dev, ABS_X,
	152	(data[2] << 8) \| data[3]);
	153	input_report_abs(input_dev, ABS_Y,
	154	(data[4] << 8) \| data[5]);
	155	input_report_abs(input_dev, ABS_PRESSURE,
	156	(data[6] << 3) \|
	157	((data[7] & 0xc0) >> 5) \|
	158	(data[1] & 0x01));
	159	input_report_abs(input_dev, ABS_TILT_X, data[7] & 0x3f);
	160	input_report_abs(input_dev, ABS_TILT_Y, data[8] & 0x7f);
	161	input_report_key(input_dev, BTN_STYLUS, data[1] & 0x02);
	162	input_report_key(input_dev, BTN_STYLUS2, data[1] & 0x04);
	163	break;
	164	}
24dd3b58 XW	165	input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
	166	input_event(input_dev, EV_MSC, MSC_SERIAL,
	167	hanwang->features->pid);
bba5394a XW	168	break;
	169
	170	case 0x0c:
	171	/* roll wheel */
24dd3b58 XW	172	hanwang->current_id = PAD_DEVICE_ID;
	173	input_report_key(input_dev, BTN_TOOL_FINGER, data[1] \|\|
	174	data[2] \|\| data[3]);
bba5394a XW	175	input_report_abs(input_dev, ABS_WHEEL, data[1]);
	176	input_report_key(input_dev, BTN_0, data[2]);
	177	for (i = 0; i < 8; i++)
	178	input_report_key(input_dev,
	179	BTN_1 + i, data[3] & (1 << i));
24dd3b58 XW	180	input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
24dd3b58 XW	181	input_event(input_dev, EV_MSC, MSC_SERIAL, 0xffffffff);
bba5394a XW	182	break;
	183
	184	default:
	185	dev_dbg(&dev->dev, "error packet %02x ", data[0]);
	186	break;
	187	}
	188
	189	input_sync(input_dev);
	190	}
	191
	192	static void hanwang_irq(struct urb *urb)
	193	{
	194	struct hanwang *hanwang = urb->context;
	195	struct usb_device *dev = hanwang->usbdev;
	196	int retval;
	197
	198	switch (urb->status) {
	199	case 0:
	200	/* success */;
	201	hanwang_parse_packet(hanwang);
	202	break;
	203	case -ECONNRESET:
	204	case -ENOENT:
	205	case -ESHUTDOWN:
	206	/* this urb is terminated, clean up */
	207	dev_err(&dev->dev, "%s - urb shutting down with status: %d",
	208	__func__, urb->status);
	209	return;
	210	default:
	211	dev_err(&dev->dev, "%s - nonzero urb status received: %d",
	212	__func__, urb->status);
	213	break;
	214	}
	215
	216	retval = usb_submit_urb(urb, GFP_ATOMIC);
	217	if (retval)
	218	dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d",
	219	__func__, retval);
	220	}
	221
	222	static int hanwang_open(struct input_dev *dev)
	223	{
	224	struct hanwang *hanwang = input_get_drvdata(dev);
	225
	226	hanwang->irq->dev = hanwang->usbdev;
	227	if (usb_submit_urb(hanwang->irq, GFP_KERNEL))
	228	return -EIO;
	229
	230	return 0;
	231	}
	232
	233	static void hanwang_close(struct input_dev *dev)
	234	{
	235	struct hanwang *hanwang = input_get_drvdata(dev);
	236
	237	usb_kill_urb(hanwang->irq);
	238	}
	239
	240	static bool get_features(struct usb_device dev, struct hanwang hanwang)
	241	{
	242	int i;
	243
	244	for (i = 0; i < ARRAY_SIZE(features_array); i++) {
	245	if (le16_to_cpu(dev->descriptor.idProduct) ==
246	features_array[i].pid) {
247	hanwang->features = &features_array[i];
248	return true;
249	}
250	}
251
252	return false;
253	}
254
255
256	static int hanwang_probe(struct usb_interface intf, const struct usb_device_id id)
257	{
258	struct usb_device *dev = interface_to_usbdev(intf);
259	struct usb_endpoint_descriptor *endpoint;
260	struct hanwang *hanwang;
261	struct input_dev *input_dev;
262	int error;
263	int i;
264
265	hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
266	input_dev = input_allocate_device();
267	if (!hanwang \|\| !input_dev) {
268	error = -ENOMEM;
269	goto fail1;
270	}
271
272	if (!get_features(dev, hanwang)) {
273	error = -ENXIO;
274	goto fail1;
275	}
276
277	hanwang->data = usb_alloc_coherent(dev, hanwang->features->pkg_len,
278	GFP_KERNEL, &hanwang->data_dma);
279	if (!hanwang->data) {
280	error = -ENOMEM;
281	goto fail1;
282	}
283
284	hanwang->irq = usb_alloc_urb(0, GFP_KERNEL);
285	if (!hanwang->irq) {
286	error = -ENOMEM;
287	goto fail2;
288	}
289
290	hanwang->usbdev = dev;
291	hanwang->dev = input_dev;
292
293	usb_make_path(dev, hanwang->phys, sizeof(hanwang->phys));
294	strlcat(hanwang->phys, "/input0", sizeof(hanwang->phys));
295
296	strlcpy(hanwang->name, hanwang->features->name, sizeof(hanwang->name));
297	input_dev->name = hanwang->name;
298	input_dev->phys = hanwang->phys;
299	usb_to_input_id(dev, &input_dev->id);
300	input_dev->dev.parent = &intf->dev;
301
302	input_set_drvdata(input_dev, hanwang);
303
304	input_dev->open = hanwang_open;
305	input_dev->close = hanwang_close;
306
307	for (i = 0; i < ARRAY_SIZE(hw_eventtypes); ++i)
308	__set_bit(hw_eventtypes[i], input_dev->evbit);
309
310	for (i = 0; i < ARRAY_SIZE(hw_absevents); ++i)
311	__set_bit(hw_absevents[i], input_dev->absbit);
312
313	for (i = 0; i < ARRAY_SIZE(hw_btnevents); ++i)
314	__set_bit(hw_btnevents[i], input_dev->keybit);
315
24dd3b58 XW	316	for (i = 0; i < ARRAY_SIZE(hw_mscevents); ++i)
	317	__set_bit(hw_mscevents[i], input_dev->mscbit);
	318
bba5394a XW	319	input_set_abs_params(input_dev, ABS_X,
	320	0, hanwang->features->max_x, 4, 0);
	321	input_set_abs_params(input_dev, ABS_Y,
	322	0, hanwang->features->max_y, 4, 0);
	323	input_set_abs_params(input_dev, ABS_TILT_X,
	324	0, hanwang->features->max_tilt_x, 0, 0);
	325	input_set_abs_params(input_dev, ABS_TILT_Y,
	326	0, hanwang->features->max_tilt_y, 0, 0);
	327	input_set_abs_params(input_dev, ABS_PRESSURE,
	328	0, hanwang->features->max_pressure, 0, 0);
	329
	330	endpoint = &intf->cur_altsetting->endpoint[0].desc;
	331	usb_fill_int_urb(hanwang->irq, dev,
	332	usb_rcvintpipe(dev, endpoint->bEndpointAddress),
	333	hanwang->data, hanwang->features->pkg_len,
	334	hanwang_irq, hanwang, endpoint->bInterval);
	335	hanwang->irq->transfer_dma = hanwang->data_dma;
	336	hanwang->irq->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;
	337
	338	error = input_register_device(hanwang->dev);
	339	if (error)
	340	goto fail3;
	341
	342	usb_set_intfdata(intf, hanwang);
	343
	344	return 0;
	345
	346	fail3: usb_free_urb(hanwang->irq);
	347	fail2: usb_free_coherent(dev, hanwang->features->pkg_len,
	348	hanwang->data, hanwang->data_dma);
	349	fail1: input_free_device(input_dev);
	350	kfree(hanwang);
	351	return error;
	352
	353	}
	354
	355	static void hanwang_disconnect(struct usb_interface *intf)
	356	{
	357	struct hanwang *hanwang = usb_get_intfdata(intf);
	358
	359	input_unregister_device(hanwang->dev);
	360	usb_free_urb(hanwang->irq);
	361	usb_free_coherent(interface_to_usbdev(intf),
	362	hanwang->features->pkg_len, hanwang->data,
	363	hanwang->data_dma);
	364	kfree(hanwang);
	365	usb_set_intfdata(intf, NULL);
	366	}
	367
	368	static const struct usb_device_id hanwang_ids[] = {
	369	{ HANWANG_TABLET_DEVICE(USB_VENDOR_ID_HANWANG, HANWANG_TABLET_INT_CLASS,
	370	HANWANG_TABLET_INT_SUB_CLASS, HANWANG_TABLET_INT_PROTOCOL) },
	371	{}
	372	};
	373
	374	MODULE_DEVICE_TABLE(usb, hanwang_ids);
	375
	376	static struct usb_driver hanwang_driver = {
	377	.name = "hanwang",
	378	.probe = hanwang_probe,
	379	.disconnect = hanwang_disconnect,
	380	.id_table = hanwang_ids,
	381	};
	382
383	static int __init hanwang_init(void)
384	{
385	return usb_register(&hanwang_driver);
386	}
387
388	static void __exit hanwang_exit(void)
389	{
390	usb_deregister(&hanwang_driver);
391	}
392
393	module_init(hanwang_init);
394	module_exit(hanwang_exit);