[deliverable/linux.git] / drivers / hid / hid-3m-pct.c

/*
 *  HID driver for 3M PCT multitouch panels
 *
 *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
 *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
 *  Copyright (c) 2010      Canonical, Ltd.
 *
 */

/*
 * 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 <linux/slab.h>
#include <linux/usb.h>
#include <linux/input/mt.h>

MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
MODULE_DESCRIPTION("3M PCT multitouch panels");
MODULE_LICENSE("GPL");

#include "hid-ids.h"

#define MAX_SLOTS		60
#define MAX_TRKID		USHRT_MAX
#define MAX_EVENTS		360

/* estimated signal-to-noise ratios */
#define SN_MOVE			2048
#define SN_WIDTH		128

struct mmm_finger {
	__s32 x, y, w, h;
	__u16 id;
	bool prev_touch;
	bool touch, valid;
};

struct mmm_data {
	struct mmm_finger f[MAX_SLOTS];
	__u16 id;
	__u8 curid;
	__u8 nexp, nreal;
	bool touch, valid;
};

static int mmm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	int f1 = field->logical_minimum;
	int f2 = field->logical_maximum;
	int df = f2 - f1;

	switch (usage->hid & HID_USAGE_PAGE) {

	case HID_UP_BUTTON:
		return -1;

	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_MT_POSITION_X,
					     f1, f2, df / SN_MOVE, 0);
			/* touchscreen emulation */
			input_set_abs_params(hi->input, ABS_X,
					     f1, f2, df / SN_MOVE, 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_MT_POSITION_Y,
					     f1, f2, df / SN_MOVE, 0);
			/* touchscreen emulation */
			input_set_abs_params(hi->input, ABS_Y,
					     f1, f2, df / SN_MOVE, 0);
			return 1;
		}
		return 0;

	case HID_UP_DIGITIZER:
		switch (usage->hid) {
		/* we do not want to map these: no input-oriented meaning */
		case 0x14:
		case 0x23:
		case HID_DG_INPUTMODE:
		case HID_DG_DEVICEINDEX:
		case HID_DG_CONTACTCOUNT:
		case HID_DG_CONTACTMAX:
		case HID_DG_INRANGE:
		case HID_DG_CONFIDENCE:
			return -1;
		case HID_DG_TIPSWITCH:
			/* touchscreen emulation */
			hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
			input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
			return 1;
		case HID_DG_WIDTH:
			hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_TOUCH_MAJOR);
			input_set_abs_params(hi->input, ABS_MT_TOUCH_MAJOR,
					     f1, f2, df / SN_WIDTH, 0);
			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_TOUCH_MINOR,
					     f1, f2, df / SN_WIDTH, 0);
			input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
					0, 1, 0, 0);
			return 1;
		case HID_DG_CONTACTID:
			field->logical_maximum = MAX_TRKID;
			hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_TRACKING_ID);
			input_set_abs_params(hi->input, ABS_MT_TRACKING_ID,
					     0, MAX_TRKID, 0, 0);
			if (!hi->input->mt)
				input_mt_create_slots(hi->input, MAX_SLOTS);
			input_set_events_per_packet(hi->input, MAX_EVENTS);
			return 1;
		}
		/* let hid-input decide for the others */
		return 0;

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

	return 0;
}

static int mmm_input_mapped(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	/* tell hid-input to skip setup of these event types */
	if (usage->type == EV_KEY || usage->type == EV_ABS)
		set_bit(usage->type, hi->input->evbit);
	return -1;
}

/*
 * this function is called when a whole packet has been received and processed,
 * so that it can decide what to send to the input layer.
 */
static void mmm_filter_event(struct mmm_data *md, struct input_dev *input)
{
	struct mmm_finger *oldest = 0;
	int i;
	for (i = 0; i < MAX_SLOTS; ++i) {
		struct mmm_finger *f = &md->f[i];
		if (!f->valid) {
			/* this finger is just placeholder data, ignore */
			continue;
		}
		input_mt_slot(input, i);
		if (f->touch) {
			/* this finger is on the screen */
			int wide = (f->w > f->h);
			/* divided by two to match visual scale of touch */
			int major = max(f->w, f->h) >> 1;
			int minor = min(f->w, f->h) >> 1;

			if (!f->prev_touch)
				f->id = md->id++;
			input_event(input, EV_ABS, ABS_MT_TRACKING_ID, f->id);
			input_event(input, EV_ABS, ABS_MT_POSITION_X, f->x);
			input_event(input, EV_ABS, ABS_MT_POSITION_Y, f->y);
			input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
			/* touchscreen emulation: pick the oldest contact */
			if (!oldest || ((f->id - oldest->id) & (SHRT_MAX + 1)))
				oldest = f;
		} else {
			/* this finger took off the screen */
			input_event(input, EV_ABS, ABS_MT_TRACKING_ID, -1);
		}
		f->prev_touch = f->touch;
		f->valid = 0;
	}

	/* touchscreen emulation */
	if (oldest) {
		input_event(input, EV_KEY, BTN_TOUCH, 1);
		input_event(input, EV_ABS, ABS_X, oldest->x);
		input_event(input, EV_ABS, ABS_Y, oldest->y);
	} else {
		input_event(input, EV_KEY, BTN_TOUCH, 0);
	}
	input_sync(input);
}

/*
 * this function is called upon all reports
 * so that we can accumulate contact point information,
 * and call input_mt_sync after each point.
 */
static int mmm_event(struct hid_device *hid, struct hid_field *field,
				struct hid_usage *usage, __s32 value)
{
	struct mmm_data *md = hid_get_drvdata(hid);
	/*
	 * strangely, this function can be called before
	 * field->hidinput is initialized!
	 */
	if (hid->claimed & HID_CLAIMED_INPUT) {
		struct input_dev *input = field->hidinput->input;
		switch (usage->hid) {
		case HID_DG_TIPSWITCH:
			md->touch = value;
			break;
		case HID_DG_CONFIDENCE:
			md->valid = value;
			break;
		case HID_DG_WIDTH:
			if (md->valid)
				md->f[md->curid].w = value;
			break;
		case HID_DG_HEIGHT:
			if (md->valid)
				md->f[md->curid].h = value;
			break;
		case HID_DG_CONTACTID:
			value = clamp_val(value, 0, MAX_SLOTS - 1);
			if (md->valid) {
				md->curid = value;
				md->f[value].touch = md->touch;
				md->f[value].valid = 1;
				md->nreal++;
			}
			break;
		case HID_GD_X:
			if (md->valid)
				md->f[md->curid].x = value;
			break;
		case HID_GD_Y:
			if (md->valid)
				md->f[md->curid].y = value;
			break;
		case HID_DG_CONTACTCOUNT:
			if (value)
				md->nexp = value;
			if (md->nreal >= md->nexp) {
				mmm_filter_event(md, input);
				md->nreal = 0;
			}
			break;
		}
	}

	/* 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 mmm_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
	int ret;
	struct mmm_data *md;

	hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;

	md = kzalloc(sizeof(struct mmm_data), GFP_KERNEL);
	if (!md) {
		dev_err(&hdev->dev, "cannot allocate 3M data\n");
		return -ENOMEM;
	}
	hid_set_drvdata(hdev, md);

	ret = hid_parse(hdev);
	if (!ret)
		ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);

	if (ret)
		kfree(md);
	return ret;
}

static void mmm_remove(struct hid_device *hdev)
{
	hid_hw_stop(hdev);
	kfree(hid_get_drvdata(hdev));
	hid_set_drvdata(hdev, NULL);
}

static const struct hid_device_id mmm_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M2256) },
	{ }
};
MODULE_DEVICE_TABLE(hid, mmm_devices);

static const struct hid_usage_id mmm_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 mmm_driver = {
	.name = "3m-pct",
	.id_table = mmm_devices,
	.probe = mmm_probe,
	.remove = mmm_remove,
	.input_mapping = mmm_input_mapping,
	.input_mapped = mmm_input_mapped,
	.usage_table = mmm_grabbed_usages,
	.event = mmm_event,
};

static int __init mmm_init(void)
{
	return hid_register_driver(&mmm_driver);
}

static void __exit mmm_exit(void)
{
	hid_unregister_driver(&mmm_driver);
}

module_init(mmm_init);
module_exit(mmm_exit);
Commit	Line	Data
b6353f4f SC	1	/*
	2	* HID driver for 3M PCT multitouch panels
	3	*
6dec143a	4	* Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
1f01a1fe HR	5	* Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
1f01a1fe HR	6	* Copyright (c) 2010 Canonical, Ltd.
b6353f4f SC	7	*
	8	*/
	9
	10	/*
	11	* This program is free software; you can redistribute it and/or modify it
	12	* under the terms of the GNU General Public License as published by the Free
	13	* Software Foundation; either version 2 of the License, or (at your option)
	14	* any later version.
	15	*/
	16
	17	#include <linux/device.h>
	18	#include <linux/hid.h>
	19	#include <linux/module.h>
5a0e3ad6	20	#include <linux/slab.h>
b6353f4f	21	#include <linux/usb.h>
47c78e89	22	#include <linux/input/mt.h>
b6353f4f	23
b6353f4f SC	24	MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
	25	MODULE_DESCRIPTION("3M PCT multitouch panels");
	26	MODULE_LICENSE("GPL");
	27
	28	#include "hid-ids.h"
	29
41035901	30	#define MAX_SLOTS 60
1f01a1fe HR	31	#define MAX_TRKID USHRT_MAX
	32	#define MAX_EVENTS 360
	33
	34	/* estimated signal-to-noise ratios */
	35	#define SN_MOVE 2048
	36	#define SN_WIDTH 128
41035901	37
b6353f4f	38	struct mmm_finger {
6dec143a	39	__s32 x, y, w, h;
1f01a1fe	40	__u16 id;
1f01a1fe	41	bool prev_touch;
b6353f4f SC	42	bool touch, valid;
	43	};
	44
	45	struct mmm_data {
41035901	46	struct mmm_finger f[MAX_SLOTS];
1f01a1fe	47	__u16 id;
1d958c83	48	__u8 curid;
41035901	49	__u8 nexp, nreal;
b6353f4f SC	50	bool touch, valid;
	51	};
	52
	53	static int mmm_input_mapping(struct hid_device hdev, struct hid_input hi,
	54	struct hid_field field, struct hid_usage usage,
	55	unsigned long *bit, int max)
	56	{
1f01a1fe HR	57	int f1 = field->logical_minimum;
	58	int f2 = field->logical_maximum;
	59	int df = f2 - f1;
	60
b6353f4f SC	61	switch (usage->hid & HID_USAGE_PAGE) {
	62
	63	case HID_UP_BUTTON:
	64	return -1;
	65
	66	case HID_UP_GENDESK:
	67	switch (usage->hid) {
	68	case HID_GD_X:
	69	hid_map_usage(hi, usage, bit, max,
	70	EV_ABS, ABS_MT_POSITION_X);
1f01a1fe HR	71	input_set_abs_params(hi->input, ABS_MT_POSITION_X,
1f01a1fe HR	72	f1, f2, df / SN_MOVE, 0);
b6353f4f SC	73	/* touchscreen emulation */
b6353f4f SC	74	input_set_abs_params(hi->input, ABS_X,
1f01a1fe	75	f1, f2, df / SN_MOVE, 0);
b6353f4f SC	76	return 1;
	77	case HID_GD_Y:
	78	hid_map_usage(hi, usage, bit, max,
	79	EV_ABS, ABS_MT_POSITION_Y);
1f01a1fe HR	80	input_set_abs_params(hi->input, ABS_MT_POSITION_Y,
1f01a1fe HR	81	f1, f2, df / SN_MOVE, 0);
b6353f4f SC	82	/* touchscreen emulation */
b6353f4f SC	83	input_set_abs_params(hi->input, ABS_Y,
1f01a1fe	84	f1, f2, df / SN_MOVE, 0);
b6353f4f SC	85	return 1;
	86	}
	87	return 0;
	88
	89	case HID_UP_DIGITIZER:
	90	switch (usage->hid) {
	91	/* we do not want to map these: no input-oriented meaning */
	92	case 0x14:
	93	case 0x23:
	94	case HID_DG_INPUTMODE:
	95	case HID_DG_DEVICEINDEX:
	96	case HID_DG_CONTACTCOUNT:
	97	case HID_DG_CONTACTMAX:
	98	case HID_DG_INRANGE:
	99	case HID_DG_CONFIDENCE:
	100	return -1;
	101	case HID_DG_TIPSWITCH:
	102	/* touchscreen emulation */
	103	hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
1f01a1fe	104	input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
b6353f4f	105	return 1;
6dec143a SC	106	case HID_DG_WIDTH:
	107	hid_map_usage(hi, usage, bit, max,
	108	EV_ABS, ABS_MT_TOUCH_MAJOR);
1f01a1fe HR	109	input_set_abs_params(hi->input, ABS_MT_TOUCH_MAJOR,
1f01a1fe HR	110	f1, f2, df / SN_WIDTH, 0);
6dec143a SC	111	return 1;
	112	case HID_DG_HEIGHT:
	113	hid_map_usage(hi, usage, bit, max,
	114	EV_ABS, ABS_MT_TOUCH_MINOR);
1f01a1fe HR	115	input_set_abs_params(hi->input, ABS_MT_TOUCH_MINOR,
1f01a1fe HR	116	f1, f2, df / SN_WIDTH, 0);
6dec143a	117	input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
46c4ba01	118	0, 1, 0, 0);
6dec143a	119	return 1;
b6353f4f	120	case HID_DG_CONTACTID:
41035901	121	field->logical_maximum = MAX_TRKID;
b6353f4f SC	122	hid_map_usage(hi, usage, bit, max,
b6353f4f SC	123	EV_ABS, ABS_MT_TRACKING_ID);
1f01a1fe HR	124	input_set_abs_params(hi->input, ABS_MT_TRACKING_ID,
	125	0, MAX_TRKID, 0, 0);
	126	if (!hi->input->mt)
	127	input_mt_create_slots(hi->input, MAX_SLOTS);
	128	input_set_events_per_packet(hi->input, MAX_EVENTS);
b6353f4f SC	129	return 1;
	130	}
	131	/* let hid-input decide for the others */
	132	return 0;
	133
	134	case 0xff000000:
	135	/* we do not want to map these: no input-oriented meaning */
	136	return -1;
	137	}
	138
	139	return 0;
	140	}
	141
	142	static int mmm_input_mapped(struct hid_device hdev, struct hid_input hi,
	143	struct hid_field field, struct hid_usage usage,
	144	unsigned long *bit, int max)
	145	{
1f01a1fe	146	/* tell hid-input to skip setup of these event types */
b6353f4f	147	if (usage->type == EV_KEY \|\| usage->type == EV_ABS)
1f01a1fe HR	148	set_bit(usage->type, hi->input->evbit);
1f01a1fe HR	149	return -1;
b6353f4f SC	150	}
	151
	152	/*
	153	* this function is called when a whole packet has been received and processed,
	154	* so that it can decide what to send to the input layer.
	155	*/
	156	static void mmm_filter_event(struct mmm_data md, struct input_dev input)
	157	{
	158	struct mmm_finger *oldest = 0;
b6353f4f	159	int i;
41035901	160	for (i = 0; i < MAX_SLOTS; ++i) {
b6353f4f SC	161	struct mmm_finger *f = &md->f[i];
	162	if (!f->valid) {
	163	/* this finger is just placeholder data, ignore */
1f01a1fe HR	164	continue;
	165	}
	166	input_mt_slot(input, i);
	167	if (f->touch) {
b6353f4f	168	/* this finger is on the screen */
6dec143a	169	int wide = (f->w > f->h);
48216fbd HR	170	/* divided by two to match visual scale of touch */
	171	int major = max(f->w, f->h) >> 1;
	172	int minor = min(f->w, f->h) >> 1;
	173
1f01a1fe HR	174	if (!f->prev_touch)
	175	f->id = md->id++;
	176	input_event(input, EV_ABS, ABS_MT_TRACKING_ID, f->id);
b6353f4f SC	177	input_event(input, EV_ABS, ABS_MT_POSITION_X, f->x);
b6353f4f SC	178	input_event(input, EV_ABS, ABS_MT_POSITION_Y, f->y);
6dec143a	179	input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
48216fbd HR	180	input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
48216fbd HR	181	input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1d958c83 HR	182	/* touchscreen emulation: pick the oldest contact */
1d958c83 HR	183	if (!oldest \|\| ((f->id - oldest->id) & (SHRT_MAX + 1)))
b6353f4f SC	184	oldest = f;
	185	} else {
	186	/* this finger took off the screen */
1f01a1fe	187	input_event(input, EV_ABS, ABS_MT_TRACKING_ID, -1);
b6353f4f	188	}
1f01a1fe	189	f->prev_touch = f->touch;
b6353f4f SC	190	f->valid = 0;
	191	}
	192
	193	/* touchscreen emulation */
	194	if (oldest) {
1d958c83	195	input_event(input, EV_KEY, BTN_TOUCH, 1);
b6353f4f SC	196	input_event(input, EV_ABS, ABS_X, oldest->x);
b6353f4f SC	197	input_event(input, EV_ABS, ABS_Y, oldest->y);
1d958c83	198	} else {
b6353f4f SC	199	input_event(input, EV_KEY, BTN_TOUCH, 0);
b6353f4f SC	200	}
41035901	201	input_sync(input);
b6353f4f SC	202	}
	203
	204	/*
	205	* this function is called upon all reports
	206	* so that we can accumulate contact point information,
	207	* and call input_mt_sync after each point.
	208	*/
	209	static int mmm_event(struct hid_device hid, struct hid_field field,
	210	struct hid_usage *usage, __s32 value)
	211	{
	212	struct mmm_data *md = hid_get_drvdata(hid);
	213	/*
	214	* strangely, this function can be called before
	215	* field->hidinput is initialized!
	216	*/
	217	if (hid->claimed & HID_CLAIMED_INPUT) {
	218	struct input_dev *input = field->hidinput->input;
	219	switch (usage->hid) {
	220	case HID_DG_TIPSWITCH:
	221	md->touch = value;
	222	break;
	223	case HID_DG_CONFIDENCE:
	224	md->valid = value;
	225	break;
6dec143a SC	226	case HID_DG_WIDTH:
	227	if (md->valid)
	228	md->f[md->curid].w = value;
	229	break;
	230	case HID_DG_HEIGHT:
	231	if (md->valid)
	232	md->f[md->curid].h = value;
	233	break;
b6353f4f	234	case HID_DG_CONTACTID:
41035901	235	value = clamp_val(value, 0, MAX_SLOTS - 1);
b6353f4f SC	236	if (md->valid) {
	237	md->curid = value;
	238	md->f[value].touch = md->touch;
	239	md->f[value].valid = 1;
41035901	240	md->nreal++;
b6353f4f SC	241	}
	242	break;
	243	case HID_GD_X:
	244	if (md->valid)
	245	md->f[md->curid].x = value;
	246	break;
	247	case HID_GD_Y:
	248	if (md->valid)
	249	md->f[md->curid].y = value;
	250	break;
	251	case HID_DG_CONTACTCOUNT:
41035901 HR	252	if (value)
	253	md->nexp = value;
	254	if (md->nreal >= md->nexp) {
	255	mmm_filter_event(md, input);
	256	md->nreal = 0;
	257	}
b6353f4f SC	258	break;
	259	}
	260	}
	261
	262	/* we have handled the hidinput part, now remains hiddev */
	263	if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
	264	hid->hiddev_hid_event(hid, field, usage, value);
	265
	266	return 1;
	267	}
	268
	269	static int mmm_probe(struct hid_device hdev, const struct hid_device_id id)
	270	{
	271	int ret;
	272	struct mmm_data *md;
	273
41035901 HR	274	hdev->quirks \|= HID_QUIRK_NO_INPUT_SYNC;
41035901 HR	275
b6353f4f SC	276	md = kzalloc(sizeof(struct mmm_data), GFP_KERNEL);
	277	if (!md) {
	278	dev_err(&hdev->dev, "cannot allocate 3M data\n");
	279	return -ENOMEM;
	280	}
	281	hid_set_drvdata(hdev, md);
	282
	283	ret = hid_parse(hdev);
	284	if (!ret)
	285	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	286
	287	if (ret)
	288	kfree(md);
	289	return ret;
	290	}
	291
	292	static void mmm_remove(struct hid_device *hdev)
	293	{
	294	hid_hw_stop(hdev);
	295	kfree(hid_get_drvdata(hdev));
	296	hid_set_drvdata(hdev, NULL);
	297	}
	298
	299	static const struct hid_device_id mmm_devices[] = {
	300	{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
6dec143a	301	{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M2256) },
b6353f4f SC	302	{ }
	303	};
	304	MODULE_DEVICE_TABLE(hid, mmm_devices);
	305
	306	static const struct hid_usage_id mmm_grabbed_usages[] = {
	307	{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
	308	{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
	309	};
	310
	311	static struct hid_driver mmm_driver = {
	312	.name = "3m-pct",
	313	.id_table = mmm_devices,
	314	.probe = mmm_probe,
	315	.remove = mmm_remove,
	316	.input_mapping = mmm_input_mapping,
	317	.input_mapped = mmm_input_mapped,
	318	.usage_table = mmm_grabbed_usages,
	319	.event = mmm_event,
	320	};
	321
	322	static int __init mmm_init(void)
	323	{
	324	return hid_register_driver(&mmm_driver);
	325	}
	326
	327	static void __exit mmm_exit(void)
	328	{
	329	hid_unregister_driver(&mmm_driver);
	330	}
	331
	332	module_init(mmm_init);
	333	module_exit(mmm_exit);
b6353f4f	334