[linux-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_TIPSWITCH:
			/* Prevent emission of touch until validated */
			return 1;
		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);
				input_report_key(input, BTN_TOUCH, 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) {
		if (hidinput->report->maxfield < 1)
			continue;

		input = hidinput->input;
		switch (hidinput->report->field[0]->application) {
		case HID_DG_PEN:
			input->name = "N-Trig Pen";
			break;
		case HID_DG_TOUCHSCREEN:
			/* These keys are redundant for fingers, clear them
			 * to prevent incorrect identification */
			__clear_bit(BTN_TOOL_PEN, input->keybit);
			__clear_bit(BTN_TOOL_FINGER, input->keybit);
			__clear_bit(BTN_0, 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;
2886539d RR	143	case HID_DG_TIPSWITCH:
	144	/* Prevent emission of touch until validated */
	145	return 1;
dbf2b17d RR	146	case HID_DG_CONFIDENCE:
	147	nd->confidence = value;
	148	break;
57fd637a SC	149	case HID_GD_X:
57fd637a SC	150	nd->x = value;
dbf2b17d RR	151	/* Clear the contact footer */
dbf2b17d RR	152	nd->mt_foot_count = 0;
57fd637a SC	153	break;
	154	case HID_GD_Y:
	155	nd->y = value;
	156	break;
	157	case HID_DG_CONTACTID:
	158	nd->id = value;
57fd637a SC	159	break;
	160	case HID_DG_WIDTH:
	161	nd->w = value;
	162	break;
	163	case HID_DG_HEIGHT:
	164	nd->h = value;
	165	/*
	166	* when in single touch mode, this is the last
	167	* report received in a finger event. We want
	168	* to emit a normal (X, Y) position
	169	*/
dbf2b17d	170	if (!nd->reading_mt) {
ff5cf34c RR	171	input_report_key(input, BTN_TOOL_DOUBLETAP,
ff5cf34c RR	172	(nd->confidence != 0));
57fd637a SC	173	input_event(input, EV_ABS, ABS_X, nd->x);
57fd637a SC	174	input_event(input, EV_ABS, ABS_Y, nd->y);
57fd637a SC	175	}
	176	break;
	177	case 0xff000002:
	178	/*
	179	* we receive this when the device is in multitouch
	180	* mode. The first of the three values tagged with
	181	* this usage tells if the contact point is real
	182	* or a placeholder
	183	*/
dbf2b17d RR	184
	185	/* Shouldn't get more than 4 footer packets, so skip */
	186	if (nd->mt_foot_count >= 4)
	187	break;
	188
	189	nd->mt_footer[nd->mt_foot_count++] = value;
	190
	191	/* if the footer isn't complete break */
	192	if (nd->mt_foot_count != 4)
	193	break;
	194
	195	/* Pen activity signal, trigger end of touch. */
	196	if (nd->mt_footer[2]) {
	197	nd->confidence = 0;
57fd637a	198	break;
dbf2b17d RR	199	}
	200
	201	/* If the contact was invalid */
	202	if (!(nd->confidence && nd->mt_footer[0])
	203	\|\| nd->w <= 250
	204	\|\| nd->h <= 190) {
	205	nd->confidence = 0;
	206	break;
	207	}
	208
57fd637a SC	209	/* emit a normal (X, Y) for the first point only */
57fd637a SC	210	if (nd->id == 0) {
dbf2b17d	211	nd->first_contact_confidence = nd->confidence;
57fd637a SC	212	input_event(input, EV_ABS, ABS_X, nd->x);
	213	input_event(input, EV_ABS, ABS_Y, nd->y);
	214	}
	215	input_event(input, EV_ABS, ABS_MT_POSITION_X, nd->x);
	216	input_event(input, EV_ABS, ABS_MT_POSITION_Y, nd->y);
	217	if (nd->w > nd->h) {
	218	input_event(input, EV_ABS,
	219	ABS_MT_ORIENTATION, 1);
	220	input_event(input, EV_ABS,
	221	ABS_MT_TOUCH_MAJOR, nd->w);
	222	input_event(input, EV_ABS,
	223	ABS_MT_TOUCH_MINOR, nd->h);
	224	} else {
	225	input_event(input, EV_ABS,
	226	ABS_MT_ORIENTATION, 0);
	227	input_event(input, EV_ABS,
	228	ABS_MT_TOUCH_MAJOR, nd->h);
	229	input_event(input, EV_ABS,
	230	ABS_MT_TOUCH_MINOR, nd->w);
	231	}
	232	input_mt_sync(field->hidinput->input);
dbf2b17d RR	233	break;
	234
	235	case HID_DG_CONTACTCOUNT: /* End of a multitouch group */
	236	if (!nd->reading_mt)
	237	break;
	238
	239	nd->reading_mt = 0;
	240
	241	if (nd->first_contact_confidence) {
	242	switch (value) {
	243	case 0: /* for single touch devices */
	244	case 1:
	245	input_report_key(input,
	246	BTN_TOOL_DOUBLETAP, 1);
	247	break;
	248	case 2:
	249	input_report_key(input,
	250	BTN_TOOL_TRIPLETAP, 1);
	251	break;
	252	case 3:
	253	default:
	254	input_report_key(input,
	255	BTN_TOOL_QUADTAP, 1);
	256	}
	257	input_report_key(input, BTN_TOUCH, 1);
	258	} else {
	259	input_report_key(input,
	260	BTN_TOOL_DOUBLETAP, 0);
	261	input_report_key(input,
	262	BTN_TOOL_TRIPLETAP, 0);
	263	input_report_key(input,
	264	BTN_TOOL_QUADTAP, 0);
2886539d	265	input_report_key(input, BTN_TOUCH, 0);
dbf2b17d	266	}
57fd637a SC	267	break;
	268
	269	default:
	270	/* fallback to the generic hidinput handling */
	271	return 0;
	272	}
	273	}
	274
	275	/* we have handled the hidinput part, now remains hiddev */
943ed464 RR	276	if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_hid_event)
943ed464 RR	277	hid->hiddev_hid_event(hid, field, usage, value);
57fd637a SC	278
	279	return 1;
	280	}
	281
	282	static int ntrig_probe(struct hid_device hdev, const struct hid_device_id id)
	283	{
	284	int ret;
	285	struct ntrig_data *nd;
943ed464 RR	286	struct hid_input *hidinput;
	287	struct input_dev *input;
	288
	289	if (id->driver_data)
	290	hdev->quirks \|= HID_QUIRK_MULTI_INPUT;
57fd637a SC	291
	292	nd = kmalloc(sizeof(struct ntrig_data), GFP_KERNEL);
	293	if (!nd) {
	294	dev_err(&hdev->dev, "cannot allocate N-Trig data\n");
	295	return -ENOMEM;
	296	}
dbf2b17d RR	297
dbf2b17d RR	298	nd->reading_mt = 0;
57fd637a SC	299	hid_set_drvdata(hdev, nd);
	300
	301	ret = hid_parse(hdev);
943ed464 RR	302	if (ret) {
	303	dev_err(&hdev->dev, "parse failed\n");
	304	goto err_free;
	305	}
	306
	307	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
	308	if (ret) {
	309	dev_err(&hdev->dev, "hw start failed\n");
	310	goto err_free;
	311	}
57fd637a	312
837b4753	313
943ed464	314	list_for_each_entry(hidinput, &hdev->inputs, list) {
2886539d RR	315	if (hidinput->report->maxfield < 1)
	316	continue;
	317
943ed464 RR	318	input = hidinput->input;
	319	switch (hidinput->report->field[0]->application) {
	320	case HID_DG_PEN:
	321	input->name = "N-Trig Pen";
	322	break;
	323	case HID_DG_TOUCHSCREEN:
2886539d RR	324	/* These keys are redundant for fingers, clear them
2886539d RR	325	* to prevent incorrect identification */
dbf2b17d	326	__clear_bit(BTN_TOOL_PEN, input->keybit);
2886539d RR	327	__clear_bit(BTN_TOOL_FINGER, input->keybit);
2886539d RR	328	__clear_bit(BTN_0, input->keybit);
dbf2b17d RR	329	/*
	330	* A little something special to enable
	331	* two and three finger taps.
	332	*/
	333	__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
	334	__set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
	335	__set_bit(BTN_TOOL_QUADTAP, input->keybit);
943ed464 RR	336	/*
	337	* The physical touchscreen (single touch)
	338	* input has a value for physical, whereas
	339	* the multitouch only has logical input
	340	* fields.
	341	*/
	342	input->name =
	343	(hidinput->report->field[0]
	344	->physical) ?
	345	"N-Trig Touchscreen" :
	346	"N-Trig MultiTouch";
	347	break;
	348	}
	349	}
	350
	351	return 0;
	352	err_free:
	353	kfree(nd);
57fd637a SC	354	return ret;
	355	}
	356
	357	static void ntrig_remove(struct hid_device *hdev)
	358	{
	359	hid_hw_stop(hdev);
	360	kfree(hid_get_drvdata(hdev));
	361	}
	362
94011f93 RR	363	static const struct hid_device_id ntrig_devices[] = {
	364	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN),
	365	.driver_data = NTRIG_DUPLICATE_USAGES },
	366	{ }
	367	};
	368	MODULE_DEVICE_TABLE(hid, ntrig_devices);
	369
57fd637a SC	370	static const struct hid_usage_id ntrig_grabbed_usages[] = {
57fd637a SC	371	{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
943ed464	372	{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1 }
57fd637a SC	373	};
57fd637a SC	374
94011f93 RR	375	static struct hid_driver ntrig_driver = {
	376	.name = "ntrig",
	377	.id_table = ntrig_devices,
57fd637a SC	378	.probe = ntrig_probe,
57fd637a SC	379	.remove = ntrig_remove,
94011f93 RR	380	.input_mapping = ntrig_input_mapping,
94011f93 RR	381	.input_mapped = ntrig_input_mapped,
57fd637a SC	382	.usage_table = ntrig_grabbed_usages,
57fd637a SC	383	.event = ntrig_event,
94011f93 RR	384	};
94011f93 RR	385
a24f423b	386	static int __init ntrig_init(void)
94011f93 RR	387	{
	388	return hid_register_driver(&ntrig_driver);
	389	}
	390
a24f423b	391	static void __exit ntrig_exit(void)
94011f93 RR	392	{
	393	hid_unregister_driver(&ntrig_driver);
	394	}
	395
	396	module_init(ntrig_init);
	397	module_exit(ntrig_exit);
	398	MODULE_LICENSE("GPL");