[linux-2.6-block.git] / drivers / hid / hid-ntrig.c

/*
 *  HID driver for N-Trig touchscreens
 *
 *  Copyright (c) 2008 Rafi Rubin
 *  Copyright (c) 2009 Stephane Chatty
 *
 */

/*
 * 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.
 */

#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>

#include "hid-ids.h"

#define NTRIG_DUPLICATE_USAGES	0x001

#define nt_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
					EV_KEY, (c))

struct ntrig_data {
	/* Incoming raw values for a single contact */
	__u16 x, y, w, h;
	__u16 id;
	__u8 confidence;

	bool reading_mt;
	__u8 first_contact_confidence;

	__u8 mt_footer[4];
	__u8 mt_foot_count;
};

/*
 * this driver is aimed at two firmware versions in circulation:
 *  - dual pen/finger single touch
 *  - finger multitouch, pen not working
 */

static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	/* No special mappings needed for the pen and single touch */
	if (field->physical)
		return 0;

	switch (usage->hid & HID_USAGE_PAGE) {
	case HID_UP_GENDESK:
		switch (usage->hid) {
		case HID_GD_X:
			hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_POSITION_X);
			input_set_abs_params(hi->input, ABS_X,
					field->logical_minimum,
					field->logical_maximum, 0, 0);
			return 1;
		case HID_GD_Y:
			hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_POSITION_Y);
			input_set_abs_params(hi->input, ABS_Y,
					field->logical_minimum,
					field->logical_maximum, 0, 0);
			return 1;
		}
		return 0;

	case HID_UP_DIGITIZER:
		switch (usage->hid) {
		/* we do not want to map these for now */
		case HID_DG_CONTACTID: /* Not trustworthy, squelch for now */
		case HID_DG_INPUTMODE:
		case HID_DG_DEVICEINDEX:
		case HID_DG_CONTACTMAX:
			return -1;

		/* width/height mapped on TouchMajor/TouchMinor/Orientation */
		case HID_DG_WIDTH:
			hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_TOUCH_MAJOR);
			return 1;
		case HID_DG_HEIGHT:
			hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_TOUCH_MINOR);
			input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
					0, 1, 0, 0);
			return 1;
		}
		return 0;

	case 0xff000000:
		/* we do not want to map these: no input-oriented meaning */
		return -1;
	}

	return 0;
}

static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	/* No special mappings needed for the pen and single touch */
	if (field->physical)
		return 0;

	if (usage->type == EV_KEY || usage->type == EV_REL
			|| usage->type == EV_ABS)
		clear_bit(usage->code, *bit);

	return 0;
}

/*
 * this function is called upon all reports
 * so that we can filter contact point information,
 * decide whether we are in multi or single touch mode
 * and call input_mt_sync after each point if necessary
 */
static int ntrig_event (struct hid_device *hid, struct hid_field *field,
		                        struct hid_usage *usage, __s32 value)
{
	struct input_dev *input = field->hidinput->input;
	struct ntrig_data *nd = hid_get_drvdata(hid);

	/* No special handling needed for the pen */
	if (field->application == HID_DG_PEN)
		return 0;

        if (hid->claimed & HID_CLAIMED_INPUT) {
		switch (usage->hid) {
		case 0xff000001:
			/* Tag indicating the start of a multitouch group */
			nd->reading_mt = 1;
			nd->first_contact_confidence = 0;
			break;
		case HID_DG_CONFIDENCE:
			nd->confidence = value;
			break;
		case HID_GD_X:
			nd->x = value;
			/* Clear the contact footer */
			nd->mt_foot_count = 0;
			break;
		case HID_GD_Y:
			nd->y = value;
			break;
		case HID_DG_CONTACTID:
			nd->id = value;
			break;
		case HID_DG_WIDTH:
			nd->w = value;
			break;
		case HID_DG_HEIGHT:
			nd->h = value;
			/*
			 * when in single touch mode, this is the last
			 * report received in a finger event. We want
			 * to emit a normal (X, Y) position
			 */
			if (!nd->reading_mt) {
				input_report_key(input, BTN_TOOL_DOUBLETAP,
						 (nd->confidence != 0));
				input_event(input, EV_ABS, ABS_X, nd->x);
				input_event(input, EV_ABS, ABS_Y, nd->y);
			}
			break;
		case 0xff000002:
			/*
			 * we receive this when the device is in multitouch
			 * mode. The first of the three values tagged with
			 * this usage tells if the contact point is real
			 * or a placeholder
			 */

			/* Shouldn't get more than 4 footer packets, so skip */
			if (nd->mt_foot_count >= 4)
				break;

			nd->mt_footer[nd->mt_foot_count++] = value;

			/* if the footer isn't complete break */
			if (nd->mt_foot_count != 4)
				break;

			/* Pen activity signal, trigger end of touch. */
			if (nd->mt_footer[2]) {
				nd->confidence = 0;
				break;
			}

			/* If the contact was invalid */
			if (!(nd->confidence && nd->mt_footer[0])
					|| nd->w <= 250
					|| nd->h <= 190) {
				nd->confidence = 0;
				break;
			}

			/* emit a normal (X, Y) for the first point only */
			if (nd->id == 0) {
				nd->first_contact_confidence = nd->confidence;
				input_event(input, EV_ABS, ABS_X, nd->x);
				input_event(input, EV_ABS, ABS_Y, nd->y);
			}
			input_event(input, EV_ABS, ABS_MT_POSITION_X, nd->x);
			input_event(input, EV_ABS, ABS_MT_POSITION_Y, nd->y);
			if (nd->w > nd->h) {
				input_event(input, EV_ABS,
						ABS_MT_ORIENTATION, 1);
				input_event(input, EV_ABS,
						ABS_MT_TOUCH_MAJOR, nd->w);
				input_event(input, EV_ABS,
						ABS_MT_TOUCH_MINOR, nd->h);
			} else {
				input_event(input, EV_ABS,
						ABS_MT_ORIENTATION, 0);
				input_event(input, EV_ABS,
						ABS_MT_TOUCH_MAJOR, nd->h);
				input_event(input, EV_ABS,
						ABS_MT_TOUCH_MINOR, nd->w);
			}
			input_mt_sync(field->hidinput->input);
			break;

		case HID_DG_CONTACTCOUNT: /* End of a multitouch group */
			if (!nd->reading_mt)
				break;

			nd->reading_mt = 0;

			if (nd->first_contact_confidence) {
				switch (value) {
				case 0:	/* for single touch devices */
				case 1:
					input_report_key(input,
							BTN_TOOL_DOUBLETAP, 1);
					break;
				case 2:
					input_report_key(input,
							BTN_TOOL_TRIPLETAP, 1);
					break;
				case 3:
				default:
					input_report_key(input,
							BTN_TOOL_QUADTAP, 1);
				}
				input_report_key(input, BTN_TOUCH, 1);
			} else {
				input_report_key(input,
						BTN_TOOL_DOUBLETAP, 0);
				input_report_key(input,
						BTN_TOOL_TRIPLETAP, 0);
				input_report_key(input,
						BTN_TOOL_QUADTAP, 0);
			}
			break;

		default:
			/* fallback to the generic hidinput handling */
			return 0;
		}
	}

	/* we have handled the hidinput part, now remains hiddev */
	if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_hid_event)
		hid->hiddev_hid_event(hid, field, usage, value);

	return 1;
}

static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
	int ret;
	struct ntrig_data *nd;
	struct hid_input *hidinput;
	struct input_dev *input;

	if (id->driver_data)
		hdev->quirks |= HID_QUIRK_MULTI_INPUT;

	nd = kmalloc(sizeof(struct ntrig_data), GFP_KERNEL);
	if (!nd) {
		dev_err(&hdev->dev, "cannot allocate N-Trig data\n");
		return -ENOMEM;
	}

	nd->reading_mt = 0;
	hid_set_drvdata(hdev, nd);

	ret = hid_parse(hdev);
	if (ret) {
		dev_err(&hdev->dev, "parse failed\n");
		goto err_free;
	}

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
	if (ret) {
		dev_err(&hdev->dev, "hw start failed\n");
		goto err_free;
	}


	list_for_each_entry(hidinput, &hdev->inputs, list) {
		input = hidinput->input;
		switch (hidinput->report->field[0]->application) {
		case HID_DG_PEN:
			input->name = "N-Trig Pen";
			break;
		case HID_DG_TOUCHSCREEN:
			__clear_bit(BTN_TOOL_PEN, input->keybit);
			/*
			 * A little something special to enable
			 * two and three finger taps.
			 */
			__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
			__set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
			__set_bit(BTN_TOOL_QUADTAP, input->keybit);
			/*
			 * The physical touchscreen (single touch)
			 * input has a value for physical, whereas
			 * the multitouch only has logical input
			 * fields.
			 */
			input->name =
				(hidinput->report->field[0]
				 ->physical) ?
				"N-Trig Touchscreen" :
				"N-Trig MultiTouch";
			break;
		}
	}

	return 0;
err_free:
	kfree(nd);
	return ret;
}

static void ntrig_remove(struct hid_device *hdev)
{
	hid_hw_stop(hdev);
	kfree(hid_get_drvdata(hdev));
}

static const struct hid_device_id ntrig_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN),
		.driver_data = NTRIG_DUPLICATE_USAGES },
	{ }
};
MODULE_DEVICE_TABLE(hid, ntrig_devices);

static const struct hid_usage_id ntrig_grabbed_usages[] = {
	{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
	{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1 }
};

static struct hid_driver ntrig_driver = {
	.name = "ntrig",
	.id_table = ntrig_devices,
	.probe = ntrig_probe,
	.remove = ntrig_remove,
	.input_mapping = ntrig_input_mapping,
	.input_mapped = ntrig_input_mapped,
	.usage_table = ntrig_grabbed_usages,
	.event = ntrig_event,
};

static int __init ntrig_init(void)
{
	return hid_register_driver(&ntrig_driver);
}

static void __exit ntrig_exit(void)
{
	hid_unregister_driver(&ntrig_driver);
}

module_init(ntrig_init);
module_exit(ntrig_exit);
MODULE_LICENSE("GPL");
Commit	Line	Data
94011f93	1	/*
57fd637a	2	* HID driver for N-Trig touchscreens
94011f93	3	*
94011f93	4	* Copyright (c) 2008 Rafi Rubin
57fd637a	5	* Copyright (c) 2009 Stephane Chatty
94011f93 RR	6	*
	7	*/
	8
	9	/*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the Free
	12	* Software Foundation; either version 2 of the License, or (at your option)
	13	* any later version.
	14	*/
	15
	16	#include <linux/device.h>
	17	#include <linux/hid.h>
	18	#include <linux/module.h>
	19
	20	#include "hid-ids.h"
	21
	22	#define NTRIG_DUPLICATE_USAGES 0x001
	23
	24	#define nt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
	25	EV_KEY, (c))
	26
57fd637a	27	struct ntrig_data {
dbf2b17d RR	28	/* Incoming raw values for a single contact */
	29	__u16 x, y, w, h;
	30	__u16 id;
	31	__u8 confidence;
	32
	33	bool reading_mt;
	34	__u8 first_contact_confidence;
	35
	36	__u8 mt_footer[4];
	37	__u8 mt_foot_count;
57fd637a SC	38	};
	39
	40	/*
	41	* this driver is aimed at two firmware versions in circulation:
	42	* - dual pen/finger single touch
	43	* - finger multitouch, pen not working
	44	*/
	45
94011f93 RR	46	static int ntrig_input_mapping(struct hid_device hdev, struct hid_input hi,
	47	struct hid_field field, struct hid_usage usage,
	48	unsigned long *bit, int max)
	49	{
dbf2b17d RR	50	/* No special mappings needed for the pen and single touch */
dbf2b17d RR	51	if (field->physical)
943ed464 RR	52	return 0;
943ed464 RR	53
57fd637a	54	switch (usage->hid & HID_USAGE_PAGE) {
57fd637a SC	55	case HID_UP_GENDESK:
	56	switch (usage->hid) {
	57	case HID_GD_X:
	58	hid_map_usage(hi, usage, bit, max,
	59	EV_ABS, ABS_MT_POSITION_X);
	60	input_set_abs_params(hi->input, ABS_X,
	61	field->logical_minimum,
	62	field->logical_maximum, 0, 0);
	63	return 1;
	64	case HID_GD_Y:
	65	hid_map_usage(hi, usage, bit, max,
	66	EV_ABS, ABS_MT_POSITION_Y);
	67	input_set_abs_params(hi->input, ABS_Y,
	68	field->logical_minimum,
	69	field->logical_maximum, 0, 0);
	70	return 1;
	71	}
	72	return 0;
	73
	74	case HID_UP_DIGITIZER:
	75	switch (usage->hid) {
	76	/* we do not want to map these for now */
dbf2b17d	77	case HID_DG_CONTACTID: /* Not trustworthy, squelch for now */
57fd637a SC	78	case HID_DG_INPUTMODE:
57fd637a SC	79	case HID_DG_DEVICEINDEX:
57fd637a SC	80	case HID_DG_CONTACTMAX:
	81	return -1;
	82
57fd637a SC	83	/* width/height mapped on TouchMajor/TouchMinor/Orientation */
	84	case HID_DG_WIDTH:
	85	hid_map_usage(hi, usage, bit, max,
	86	EV_ABS, ABS_MT_TOUCH_MAJOR);
	87	return 1;
	88	case HID_DG_HEIGHT:
	89	hid_map_usage(hi, usage, bit, max,
	90	EV_ABS, ABS_MT_TOUCH_MINOR);
	91	input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
	92	0, 1, 0, 0);
	93	return 1;
	94	}
	95	return 0;
	96
	97	case 0xff000000:
	98	/* we do not want to map these: no input-oriented meaning */
	99	return -1;
94011f93	100	}
57fd637a	101
94011f93 RR	102	return 0;
	103	}
	104
	105	static int ntrig_input_mapped(struct hid_device hdev, struct hid_input hi,
	106	struct hid_field field, struct hid_usage usage,
	107	unsigned long *bit, int max)
	108	{
dbf2b17d RR	109	/* No special mappings needed for the pen and single touch */
dbf2b17d RR	110	if (field->physical)
943ed464	111	return 0;
b0549cf1	112
94011f93 RR	113	if (usage->type == EV_KEY \|\| usage->type == EV_REL
	114	\|\| usage->type == EV_ABS)
	115	clear_bit(usage->code, *bit);
	116
	117	return 0;
	118	}
57fd637a SC	119
	120	/*
	121	* this function is called upon all reports
	122	* so that we can filter contact point information,
	123	* decide whether we are in multi or single touch mode
	124	* and call input_mt_sync after each point if necessary
	125	*/
	126	static int ntrig_event (struct hid_device hid, struct hid_field field,
	127	struct hid_usage *usage, __s32 value)
	128	{
	129	struct input_dev *input = field->hidinput->input;
	130	struct ntrig_data *nd = hid_get_drvdata(hid);
	131
943ed464 RR	132	/* No special handling needed for the pen */
	133	if (field->application == HID_DG_PEN)
	134	return 0;
	135
57fd637a SC	136	if (hid->claimed & HID_CLAIMED_INPUT) {
57fd637a SC	137	switch (usage->hid) {
dbf2b17d RR	138	case 0xff000001:
	139	/* Tag indicating the start of a multitouch group */
	140	nd->reading_mt = 1;
	141	nd->first_contact_confidence = 0;
	142	break;
	143	case HID_DG_CONFIDENCE:
	144	nd->confidence = value;
	145	break;
57fd637a SC	146	case HID_GD_X:
57fd637a SC	147	nd->x = value;
dbf2b17d RR	148	/* Clear the contact footer */
dbf2b17d RR	149	nd->mt_foot_count = 0;
57fd637a SC	150	break;
	151	case HID_GD_Y:
	152	nd->y = value;
	153	break;
	154	case HID_DG_CONTACTID:
	155	nd->id = value;
57fd637a SC	156	break;
	157	case HID_DG_WIDTH:
	158	nd->w = value;
	159	break;
	160	case HID_DG_HEIGHT:
	161	nd->h = value;
	162	/*
	163	* when in single touch mode, this is the last
	164	* report received in a finger event. We want
	165	* to emit a normal (X, Y) position
	166	*/
dbf2b17d	167	if (!nd->reading_mt) {
ff5cf34c RR	168	input_report_key(input, BTN_TOOL_DOUBLETAP,
ff5cf34c RR	169	(nd->confidence != 0));
57fd637a SC	170	input_event(input, EV_ABS, ABS_X, nd->x);
57fd637a SC	171	input_event(input, EV_ABS, ABS_Y, nd->y);
57fd637a SC	172	}
	173	break;
	174	case 0xff000002:
	175	/*
	176	* we receive this when the device is in multitouch
	177	* mode. The first of the three values tagged with
	178	* this usage tells if the contact point is real
	179	* or a placeholder
	180	*/
dbf2b17d RR	181
	182	/* Shouldn't get more than 4 footer packets, so skip */
	183	if (nd->mt_foot_count >= 4)
	184	break;
	185
	186	nd->mt_footer[nd->mt_foot_count++] = value;
	187
	188	/* if the footer isn't complete break */
	189	if (nd->mt_foot_count != 4)
	190	break;
	191
	192	/* Pen activity signal, trigger end of touch. */
	193	if (nd->mt_footer[2]) {
	194	nd->confidence = 0;
57fd637a	195	break;
dbf2b17d RR	196	}
	197
	198	/* If the contact was invalid */
	199	if (!(nd->confidence && nd->mt_footer[0])
	200	\|\| nd->w <= 250
	201	\|\| nd->h <= 190) {
	202	nd->confidence = 0;
	203	break;
	204	}
	205
57fd637a SC	206	/* emit a normal (X, Y) for the first point only */
57fd637a SC	207	if (nd->id == 0) {
dbf2b17d	208	nd->first_contact_confidence = nd->confidence;
57fd637a SC	209	input_event(input, EV_ABS, ABS_X, nd->x);
	210	input_event(input, EV_ABS, ABS_Y, nd->y);
	211	}
	212	input_event(input, EV_ABS, ABS_MT_POSITION_X, nd->x);
	213	input_event(input, EV_ABS, ABS_MT_POSITION_Y, nd->y);
	214	if (nd->w > nd->h) {
	215	input_event(input, EV_ABS,
	216	ABS_MT_ORIENTATION, 1);
	217	input_event(input, EV_ABS,
	218	ABS_MT_TOUCH_MAJOR, nd->w);
	219	input_event(input, EV_ABS,
	220	ABS_MT_TOUCH_MINOR, nd->h);
	221	} else {
	222	input_event(input, EV_ABS,
	223	ABS_MT_ORIENTATION, 0);
	224	input_event(input, EV_ABS,
	225	ABS_MT_TOUCH_MAJOR, nd->h);
	226	input_event(input, EV_ABS,
	227	ABS_MT_TOUCH_MINOR, nd->w);
	228	}
	229	input_mt_sync(field->hidinput->input);
dbf2b17d RR	230	break;
	231
	232	case HID_DG_CONTACTCOUNT: /* End of a multitouch group */
	233	if (!nd->reading_mt)
	234	break;
	235
	236	nd->reading_mt = 0;
	237
	238	if (nd->first_contact_confidence) {
	239	switch (value) {
	240	case 0: /* for single touch devices */
	241	case 1:
	242	input_report_key(input,
	243	BTN_TOOL_DOUBLETAP, 1);
	244	break;
	245	case 2:
	246	input_report_key(input,
	247	BTN_TOOL_TRIPLETAP, 1);
	248	break;
	249	case 3:
	250	default:
	251	input_report_key(input,
	252	BTN_TOOL_QUADTAP, 1);
	253	}
	254	input_report_key(input, BTN_TOUCH, 1);
	255	} else {
	256	input_report_key(input,
	257	BTN_TOOL_DOUBLETAP, 0);
	258	input_report_key(input,
	259	BTN_TOOL_TRIPLETAP, 0);
	260	input_report_key(input,
	261	BTN_TOOL_QUADTAP, 0);
	262	}
57fd637a SC	263	break;
	264
	265	default:
	266	/* fallback to the generic hidinput handling */
	267	return 0;
	268	}
	269	}
	270
	271	/* we have handled the hidinput part, now remains hiddev */
943ed464 RR	272	if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_hid_event)
943ed464 RR	273	hid->hiddev_hid_event(hid, field, usage, value);
57fd637a SC	274
	275	return 1;
	276	}
	277
	278	static int ntrig_probe(struct hid_device hdev, const struct hid_device_id id)
	279	{
	280	int ret;
	281	struct ntrig_data *nd;
943ed464 RR	282	struct hid_input *hidinput;
	283	struct input_dev *input;
	284
	285	if (id->driver_data)
	286	hdev->quirks \|= HID_QUIRK_MULTI_INPUT;
57fd637a SC	287
	288	nd = kmalloc(sizeof(struct ntrig_data), GFP_KERNEL);
	289	if (!nd) {
	290	dev_err(&hdev->dev, "cannot allocate N-Trig data\n");
	291	return -ENOMEM;
	292	}
dbf2b17d RR	293
dbf2b17d RR	294	nd->reading_mt = 0;
57fd637a SC	295	hid_set_drvdata(hdev, nd);
	296
	297	ret = hid_parse(hdev);
943ed464 RR	298	if (ret) {
	299	dev_err(&hdev->dev, "parse failed\n");
	300	goto err_free;
	301	}
	302
	303	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
	304	if (ret) {
	305	dev_err(&hdev->dev, "hw start failed\n");
	306	goto err_free;
	307	}
57fd637a	308
837b4753	309
943ed464 RR	310	list_for_each_entry(hidinput, &hdev->inputs, list) {
	311	input = hidinput->input;
	312	switch (hidinput->report->field[0]->application) {
	313	case HID_DG_PEN:
	314	input->name = "N-Trig Pen";
	315	break;
	316	case HID_DG_TOUCHSCREEN:
dbf2b17d RR	317	__clear_bit(BTN_TOOL_PEN, input->keybit);
	318	/*
	319	* A little something special to enable
	320	* two and three finger taps.
	321	*/
	322	__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
	323	__set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
	324	__set_bit(BTN_TOOL_QUADTAP, input->keybit);
943ed464 RR	325	/*
	326	* The physical touchscreen (single touch)
	327	* input has a value for physical, whereas
	328	* the multitouch only has logical input
	329	* fields.
	330	*/
	331	input->name =
	332	(hidinput->report->field[0]
	333	->physical) ?
	334	"N-Trig Touchscreen" :
	335	"N-Trig MultiTouch";
	336	break;
	337	}
	338	}
	339
	340	return 0;
	341	err_free:
	342	kfree(nd);
57fd637a SC	343	return ret;
	344	}
	345
	346	static void ntrig_remove(struct hid_device *hdev)
	347	{
	348	hid_hw_stop(hdev);
	349	kfree(hid_get_drvdata(hdev));
	350	}
	351
94011f93 RR	352	static const struct hid_device_id ntrig_devices[] = {
	353	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN),
	354	.driver_data = NTRIG_DUPLICATE_USAGES },
	355	{ }
	356	};
	357	MODULE_DEVICE_TABLE(hid, ntrig_devices);
	358
57fd637a SC	359	static const struct hid_usage_id ntrig_grabbed_usages[] = {
57fd637a SC	360	{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
943ed464	361	{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1 }
57fd637a SC	362	};
57fd637a SC	363
94011f93 RR	364	static struct hid_driver ntrig_driver = {
	365	.name = "ntrig",
	366	.id_table = ntrig_devices,
57fd637a SC	367	.probe = ntrig_probe,
57fd637a SC	368	.remove = ntrig_remove,
94011f93 RR	369	.input_mapping = ntrig_input_mapping,
94011f93 RR	370	.input_mapped = ntrig_input_mapped,
57fd637a SC	371	.usage_table = ntrig_grabbed_usages,
57fd637a SC	372	.event = ntrig_event,
94011f93 RR	373	};
94011f93 RR	374
a24f423b	375	static int __init ntrig_init(void)
94011f93 RR	376	{
	377	return hid_register_driver(&ntrig_driver);
	378	}
	379
a24f423b	380	static void __exit ntrig_exit(void)
94011f93 RR	381	{
	382	hid_unregister_driver(&ntrig_driver);
	383	}
	384
	385	module_init(ntrig_init);
	386	module_exit(ntrig_exit);
	387	MODULE_LICENSE("GPL");