2 * HID driver for multitouch panels
4 * Copyright (c) 2010-2011 Stephane Chatty <chatty@enac.fr>
5 * Copyright (c) 2010-2011 Benjamin Tissoires <benjamin.tissoires@gmail.com>
6 * Copyright (c) 2010-2011 Ecole Nationale de l'Aviation Civile, France
8 * This code is partly based on hid-egalax.c:
10 * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
11 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
12 * Copyright (c) 2010 Canonical, Ltd.
14 * This code is partly based on hid-3m-pct.c:
16 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
17 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
18 * Copyright (c) 2010 Canonical, Ltd.
23 * This program is free software; you can redistribute it and/or modify it
24 * under the terms of the GNU General Public License as published by the Free
25 * Software Foundation; either version 2 of the License, or (at your option)
29 #include <linux/device.h>
30 #include <linux/hid.h>
31 #include <linux/module.h>
32 #include <linux/slab.h>
33 #include <linux/usb.h>
34 #include <linux/input/mt.h>
35 #include "usbhid/usbhid.h"
38 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
39 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
40 MODULE_DESCRIPTION("HID multitouch panels");
41 MODULE_LICENSE("GPL");
45 /* quirks to control the device */
46 #define MT_QUIRK_NOT_SEEN_MEANS_UP (1 << 0)
47 #define MT_QUIRK_SLOT_IS_CONTACTID (1 << 1)
48 #define MT_QUIRK_CYPRESS (1 << 2)
49 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER (1 << 3)
50 #define MT_QUIRK_VALID_IS_INRANGE (1 << 4)
51 #define MT_QUIRK_VALID_IS_CONFIDENCE (1 << 5)
52 #define MT_QUIRK_EGALAX_XYZ_FIXUP (1 << 6)
53 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE (1 << 7)
57 __s32 contactid; /* the device ContactID assigned to this slot */
58 bool touch_state; /* is the touch valid? */
59 bool seen_in_this_frame;/* has this slot been updated */
63 struct mt_slot curdata; /* placeholder of incoming data */
64 struct mt_class *mtclass; /* our mt device class */
65 unsigned last_field_index; /* last field index of the report */
66 unsigned last_slot_field; /* the last field of a slot */
67 __s8 inputmode; /* InputMode HID feature, -1 if non-existent */
68 __u8 num_received; /* how many contacts we received */
69 __u8 num_expected; /* expected last contact index */
71 bool curvalid; /* is the current contact valid? */
72 struct mt_slot *slots;
76 __s32 name; /* MT_CLS */
78 __s32 sn_move; /* Signal/noise ratio for move events */
79 __s32 sn_width; /* Signal/noise ratio for width events */
80 __s32 sn_height; /* Signal/noise ratio for height events */
81 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
85 /* classes of device behavior */
86 #define MT_CLS_DEFAULT 1
87 #define MT_CLS_DUAL_INRANGE_CONTACTID 2
88 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 3
89 #define MT_CLS_CYPRESS 4
90 #define MT_CLS_EGALAX 5
91 #define MT_CLS_STANTUM 6
93 #define MT_CLS_CONFIDENCE 8
94 #define MT_CLS_CONFIDENCE_MINUS_ONE 9
95 #define MT_CLS_DUAL_NSMU_CONTACTID 10
97 #define MT_DEFAULT_MAXCONTACT 10
100 * these device-dependent functions determine what slot corresponds
101 * to a valid contact that was just read.
104 static int cypress_compute_slot(struct mt_device *td)
106 if (td->curdata.contactid != 0 || td->num_received == 0)
107 return td->curdata.contactid;
112 static int find_slot_from_contactid(struct mt_device *td)
115 for (i = 0; i < td->maxcontacts; ++i) {
116 if (td->slots[i].contactid == td->curdata.contactid &&
117 td->slots[i].touch_state)
120 for (i = 0; i < td->maxcontacts; ++i) {
121 if (!td->slots[i].seen_in_this_frame &&
122 !td->slots[i].touch_state)
125 /* should not occurs. If this happens that means
126 * that the device sent more touches that it says
127 * in the report descriptor. It is ignored then. */
131 struct mt_class mt_classes[] = {
132 { .name = MT_CLS_DEFAULT,
133 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
134 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
135 .quirks = MT_QUIRK_VALID_IS_INRANGE |
136 MT_QUIRK_SLOT_IS_CONTACTID,
138 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
139 .quirks = MT_QUIRK_VALID_IS_INRANGE |
140 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
142 { .name = MT_CLS_CYPRESS,
143 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
146 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
147 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
148 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
149 { .name = MT_CLS_EGALAX,
150 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
151 MT_QUIRK_VALID_IS_INRANGE |
152 MT_QUIRK_EGALAX_XYZ_FIXUP,
157 { .name = MT_CLS_STANTUM,
158 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
160 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
161 MT_QUIRK_SLOT_IS_CONTACTID,
165 { .name = MT_CLS_CONFIDENCE,
166 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
167 { .name = MT_CLS_DUAL_NSMU_CONTACTID,
168 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
169 MT_QUIRK_SLOT_IS_CONTACTID,
175 static void mt_feature_mapping(struct hid_device *hdev,
176 struct hid_field *field, struct hid_usage *usage)
178 struct mt_device *td = hid_get_drvdata(hdev);
180 switch (usage->hid) {
181 case HID_DG_INPUTMODE:
182 td->inputmode = field->report->id;
184 case HID_DG_CONTACTMAX:
185 td->maxcontacts = field->value[0];
186 if (td->mtclass->maxcontacts)
187 /* check if the maxcontacts is given by the class */
188 td->maxcontacts = td->mtclass->maxcontacts;
194 static void set_abs(struct input_dev *input, unsigned int code,
195 struct hid_field *field, int snratio)
197 int fmin = field->logical_minimum;
198 int fmax = field->logical_maximum;
199 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
200 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
203 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
204 struct hid_field *field, struct hid_usage *usage,
205 unsigned long **bit, int *max)
207 struct mt_device *td = hid_get_drvdata(hdev);
208 struct mt_class *cls = td->mtclass;
209 __s32 quirks = cls->quirks;
211 switch (usage->hid & HID_USAGE_PAGE) {
214 switch (usage->hid) {
216 if (quirks & MT_QUIRK_EGALAX_XYZ_FIXUP)
217 field->logical_maximum = 32760;
218 hid_map_usage(hi, usage, bit, max,
219 EV_ABS, ABS_MT_POSITION_X);
220 set_abs(hi->input, ABS_MT_POSITION_X, field,
222 /* touchscreen emulation */
223 set_abs(hi->input, ABS_X, field, cls->sn_move);
224 td->last_slot_field = usage->hid;
225 td->last_field_index = field->index;
228 if (quirks & MT_QUIRK_EGALAX_XYZ_FIXUP)
229 field->logical_maximum = 32760;
230 hid_map_usage(hi, usage, bit, max,
231 EV_ABS, ABS_MT_POSITION_Y);
232 set_abs(hi->input, ABS_MT_POSITION_Y, field,
234 /* touchscreen emulation */
235 set_abs(hi->input, ABS_Y, field, cls->sn_move);
236 td->last_slot_field = usage->hid;
237 td->last_field_index = field->index;
242 case HID_UP_DIGITIZER:
243 switch (usage->hid) {
245 td->last_slot_field = usage->hid;
246 td->last_field_index = field->index;
248 case HID_DG_CONFIDENCE:
249 td->last_slot_field = usage->hid;
250 td->last_field_index = field->index;
252 case HID_DG_TIPSWITCH:
253 hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
254 input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
255 td->last_slot_field = usage->hid;
256 td->last_field_index = field->index;
258 case HID_DG_CONTACTID:
259 input_mt_init_slots(hi->input, td->maxcontacts);
260 td->last_slot_field = usage->hid;
261 td->last_field_index = field->index;
264 hid_map_usage(hi, usage, bit, max,
265 EV_ABS, ABS_MT_TOUCH_MAJOR);
266 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
268 td->last_slot_field = usage->hid;
269 td->last_field_index = field->index;
272 hid_map_usage(hi, usage, bit, max,
273 EV_ABS, ABS_MT_TOUCH_MINOR);
274 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
276 input_set_abs_params(hi->input,
277 ABS_MT_ORIENTATION, 0, 1, 0, 0);
278 td->last_slot_field = usage->hid;
279 td->last_field_index = field->index;
281 case HID_DG_TIPPRESSURE:
282 if (quirks & MT_QUIRK_EGALAX_XYZ_FIXUP)
283 field->logical_minimum = 0;
284 hid_map_usage(hi, usage, bit, max,
285 EV_ABS, ABS_MT_PRESSURE);
286 set_abs(hi->input, ABS_MT_PRESSURE, field,
288 /* touchscreen emulation */
289 set_abs(hi->input, ABS_PRESSURE, field,
291 td->last_slot_field = usage->hid;
292 td->last_field_index = field->index;
294 case HID_DG_CONTACTCOUNT:
295 td->last_field_index = field->index;
297 case HID_DG_CONTACTMAX:
298 /* we don't set td->last_slot_field as contactcount and
299 * contact max are global to the report */
300 td->last_field_index = field->index;
303 /* let hid-input decide for the others */
307 /* we do not want to map these: no input-oriented meaning */
314 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
315 struct hid_field *field, struct hid_usage *usage,
316 unsigned long **bit, int *max)
318 if (usage->type == EV_KEY || usage->type == EV_ABS)
319 set_bit(usage->type, hi->input->evbit);
324 static int mt_compute_slot(struct mt_device *td)
326 __s32 quirks = td->mtclass->quirks;
328 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
329 return td->curdata.contactid;
331 if (quirks & MT_QUIRK_CYPRESS)
332 return cypress_compute_slot(td);
334 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
335 return td->num_received;
337 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
338 return td->curdata.contactid - 1;
340 return find_slot_from_contactid(td);
344 * this function is called when a whole contact has been processed,
345 * so that it can assign it to a slot and store the data there
347 static void mt_complete_slot(struct mt_device *td)
349 td->curdata.seen_in_this_frame = true;
351 int slotnum = mt_compute_slot(td);
353 if (slotnum >= 0 && slotnum < td->maxcontacts)
354 td->slots[slotnum] = td->curdata;
361 * this function is called when a whole packet has been received and processed,
362 * so that it can decide what to send to the input layer.
364 static void mt_emit_event(struct mt_device *td, struct input_dev *input)
368 for (i = 0; i < td->maxcontacts; ++i) {
369 struct mt_slot *s = &(td->slots[i]);
370 if ((td->mtclass->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) &&
371 !s->seen_in_this_frame) {
372 s->touch_state = false;
375 input_mt_slot(input, i);
376 input_mt_report_slot_state(input, MT_TOOL_FINGER,
378 if (s->touch_state) {
379 /* this finger is on the screen */
380 int wide = (s->w > s->h);
381 /* divided by two to match visual scale of touch */
382 int major = max(s->w, s->h) >> 1;
383 int minor = min(s->w, s->h) >> 1;
385 input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
386 input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
387 input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
388 input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
389 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
390 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
392 s->seen_in_this_frame = false;
396 input_mt_report_pointer_emulation(input, true);
398 td->num_received = 0;
403 static int mt_event(struct hid_device *hid, struct hid_field *field,
404 struct hid_usage *usage, __s32 value)
406 struct mt_device *td = hid_get_drvdata(hid);
407 __s32 quirks = td->mtclass->quirks;
409 if (hid->claimed & HID_CLAIMED_INPUT && td->slots) {
410 switch (usage->hid) {
412 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
413 td->curvalid = value;
415 case HID_DG_TIPSWITCH:
416 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
417 td->curvalid = value;
418 td->curdata.touch_state = value;
420 case HID_DG_CONFIDENCE:
421 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
422 td->curvalid = value;
424 case HID_DG_CONTACTID:
425 td->curdata.contactid = value;
427 case HID_DG_TIPPRESSURE:
428 td->curdata.p = value;
431 td->curdata.x = value;
434 td->curdata.y = value;
437 td->curdata.w = value;
440 td->curdata.h = value;
442 case HID_DG_CONTACTCOUNT:
444 * Includes multi-packet support where subsequent
445 * packets are sent with zero contactcount.
448 td->num_expected = value;
452 /* fallback to the generic hidinput handling */
456 if (usage->hid == td->last_slot_field) {
457 mt_complete_slot(td);
460 if (field->index == td->last_field_index
461 && td->num_received >= td->num_expected)
462 mt_emit_event(td, field->hidinput->input);
466 /* we have handled the hidinput part, now remains hiddev */
467 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
468 hid->hiddev_hid_event(hid, field, usage, value);
473 static void mt_set_input_mode(struct hid_device *hdev)
475 struct mt_device *td = hid_get_drvdata(hdev);
476 struct hid_report *r;
477 struct hid_report_enum *re;
479 if (td->inputmode < 0)
482 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
483 r = re->report_id_hash[td->inputmode];
485 r->field[0]->value[0] = 0x02;
486 usbhid_submit_report(hdev, r, USB_DIR_OUT);
490 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
493 struct mt_device *td;
494 struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
496 for (i = 0; mt_classes[i].name ; i++) {
497 if (id->driver_data == mt_classes[i].name) {
498 mtclass = &(mt_classes[i]);
503 /* This allows the driver to correctly support devices
504 * that emit events over several HID messages.
506 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
508 td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
510 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
513 td->mtclass = mtclass;
515 hid_set_drvdata(hdev, td);
517 ret = hid_parse(hdev);
521 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
525 if (!td->maxcontacts)
526 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
528 td->slots = kzalloc(td->maxcontacts * sizeof(struct mt_slot),
531 dev_err(&hdev->dev, "cannot allocate multitouch slots\n");
537 mt_set_input_mode(hdev);
547 static int mt_reset_resume(struct hid_device *hdev)
549 mt_set_input_mode(hdev);
554 static void mt_remove(struct hid_device *hdev)
556 struct mt_device *td = hid_get_drvdata(hdev);
560 hid_set_drvdata(hdev, NULL);
563 static const struct hid_device_id mt_devices[] = {
566 { .driver_data = MT_CLS_3M,
567 HID_USB_DEVICE(USB_VENDOR_ID_3M,
568 USB_DEVICE_ID_3M1968) },
569 { .driver_data = MT_CLS_3M,
570 HID_USB_DEVICE(USB_VENDOR_ID_3M,
571 USB_DEVICE_ID_3M2256) },
573 /* ActionStar panels */
574 { .driver_data = MT_CLS_DEFAULT,
575 HID_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
576 USB_DEVICE_ID_ACTIONSTAR_1011) },
579 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
580 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
581 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
582 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
583 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
584 USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
585 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
586 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
587 USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
588 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
589 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
590 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
593 { .driver_data = MT_CLS_CYPRESS,
594 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
595 USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
597 /* Elo TouchSystems IntelliTouch Plus panel */
598 { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID,
599 HID_USB_DEVICE(USB_VENDOR_ID_ELO,
600 USB_DEVICE_ID_ELO_TS2515) },
602 /* GeneralTouch panel */
603 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
604 HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
605 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
607 /* Ilitek dual touch panel */
608 { .driver_data = MT_CLS_DEFAULT,
609 HID_USB_DEVICE(USB_VENDOR_ID_ILITEK,
610 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
613 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
614 HID_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
615 USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
618 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
619 HID_USB_DEVICE(USB_VENDOR_ID_LUMIO,
620 USB_DEVICE_ID_CRYSTALTOUCH) },
623 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
624 HID_USB_DEVICE(USB_VENDOR_ID_ASUS,
625 USB_DEVICE_ID_ASUS_T91MT)},
626 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
627 HID_USB_DEVICE(USB_VENDOR_ID_ASUS,
628 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
629 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
630 HID_USB_DEVICE(USB_VENDOR_ID_TURBOX,
631 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
633 /* PenMount panels */
634 { .driver_data = MT_CLS_CONFIDENCE,
635 HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
636 USB_DEVICE_ID_PENMOUNT_PCI) },
638 /* PixCir-based panels */
639 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
640 HID_USB_DEVICE(USB_VENDOR_ID_HANVON,
641 USB_DEVICE_ID_HANVON_MULTITOUCH) },
642 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
643 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
644 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
646 /* Resistive eGalax devices */
647 { .driver_data = MT_CLS_EGALAX,
648 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
649 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH) },
650 { .driver_data = MT_CLS_EGALAX,
651 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
652 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH3) },
654 /* Capacitive eGalax devices */
655 { .driver_data = MT_CLS_EGALAX,
656 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
657 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1) },
658 { .driver_data = MT_CLS_EGALAX,
659 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
660 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH2) },
661 { .driver_data = MT_CLS_EGALAX,
662 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
663 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH4) },
666 { .driver_data = MT_CLS_STANTUM,
667 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM,
669 { .driver_data = MT_CLS_STANTUM,
670 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM,
671 USB_DEVICE_ID_MTP_STM)},
672 { .driver_data = MT_CLS_STANTUM,
673 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM,
674 USB_DEVICE_ID_MTP_SITRONIX)},
678 MODULE_DEVICE_TABLE(hid, mt_devices);
680 static const struct hid_usage_id mt_grabbed_usages[] = {
681 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
682 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
685 static struct hid_driver mt_driver = {
686 .name = "hid-multitouch",
687 .id_table = mt_devices,
690 .input_mapping = mt_input_mapping,
691 .input_mapped = mt_input_mapped,
692 .feature_mapping = mt_feature_mapping,
693 .usage_table = mt_grabbed_usages,
696 .reset_resume = mt_reset_resume,
700 static int __init mt_init(void)
702 return hid_register_driver(&mt_driver);
705 static void __exit mt_exit(void)
707 hid_unregister_driver(&mt_driver);
710 module_init(mt_init);
711 module_exit(mt_exit);