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UBUNTU: Ubuntu-4.13.0-45.50
[mirror_ubuntu-artful-kernel.git] / drivers / hid / hid-multitouch.c
1 /*
2 * HID driver for multitouch panels
3 *
4 * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
5 * Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
6 * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
7 * Copyright (c) 2012-2013 Red Hat, Inc
8 *
9 * This code is partly based on hid-egalax.c:
10 *
11 * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
12 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
13 * Copyright (c) 2010 Canonical, Ltd.
14 *
15 * This code is partly based on hid-3m-pct.c:
16 *
17 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
18 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
19 * Copyright (c) 2010 Canonical, Ltd.
20 *
21 */
22
23 /*
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License as published by the Free
26 * Software Foundation; either version 2 of the License, or (at your option)
27 * any later version.
28 */
29
30 /*
31 * This driver is regularly tested thanks to the tool hid-test[1].
32 * This tool relies on hid-replay[2] and a database of hid devices[3].
33 * Please run these regression tests before patching this module so that
34 * your patch won't break existing known devices.
35 *
36 * [1] https://github.com/bentiss/hid-test
37 * [2] https://github.com/bentiss/hid-replay
38 * [3] https://github.com/bentiss/hid-devices
39 */
40
41 #include <linux/device.h>
42 #include <linux/hid.h>
43 #include <linux/module.h>
44 #include <linux/slab.h>
45 #include <linux/input/mt.h>
46 #include <linux/string.h>
47 #include <linux/timer.h>
48
49
50 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
51 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
52 MODULE_DESCRIPTION("HID multitouch panels");
53 MODULE_LICENSE("GPL");
54
55 #include "hid-ids.h"
56
57 /* quirks to control the device */
58 #define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0)
59 #define MT_QUIRK_SLOT_IS_CONTACTID BIT(1)
60 #define MT_QUIRK_CYPRESS BIT(2)
61 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER BIT(3)
62 #define MT_QUIRK_ALWAYS_VALID BIT(4)
63 #define MT_QUIRK_VALID_IS_INRANGE BIT(5)
64 #define MT_QUIRK_VALID_IS_CONFIDENCE BIT(6)
65 #define MT_QUIRK_CONFIDENCE BIT(7)
66 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE BIT(8)
67 #define MT_QUIRK_NO_AREA BIT(9)
68 #define MT_QUIRK_IGNORE_DUPLICATES BIT(10)
69 #define MT_QUIRK_HOVERING BIT(11)
70 #define MT_QUIRK_CONTACT_CNT_ACCURATE BIT(12)
71 #define MT_QUIRK_FORCE_GET_FEATURE BIT(13)
72 #define MT_QUIRK_FIX_CONST_CONTACT_ID BIT(14)
73 #define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15)
74 #define MT_QUIRK_STICKY_FINGERS BIT(16)
75
76 #define MT_INPUTMODE_TOUCHSCREEN 0x02
77 #define MT_INPUTMODE_TOUCHPAD 0x03
78
79 #define MT_BUTTONTYPE_CLICKPAD 0
80
81 #define MT_IO_FLAGS_RUNNING 0
82 #define MT_IO_FLAGS_ACTIVE_SLOTS 1
83 #define MT_IO_FLAGS_PENDING_SLOTS 2
84
85 struct mt_slot {
86 __s32 x, y, cx, cy, p, w, h;
87 __s32 contactid; /* the device ContactID assigned to this slot */
88 bool touch_state; /* is the touch valid? */
89 bool inrange_state; /* is the finger in proximity of the sensor? */
90 bool confidence_state; /* is the touch made by a finger? */
91 };
92
93 struct mt_class {
94 __s32 name; /* MT_CLS */
95 __s32 quirks;
96 __s32 sn_move; /* Signal/noise ratio for move events */
97 __s32 sn_width; /* Signal/noise ratio for width events */
98 __s32 sn_height; /* Signal/noise ratio for height events */
99 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
100 __u8 maxcontacts;
101 bool is_indirect; /* true for touchpads */
102 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
103 };
104
105 struct mt_fields {
106 unsigned usages[HID_MAX_FIELDS];
107 unsigned int length;
108 };
109
110 struct mt_device {
111 struct mt_slot curdata; /* placeholder of incoming data */
112 struct mt_class mtclass; /* our mt device class */
113 struct timer_list release_timer; /* to release sticky fingers */
114 struct mt_fields *fields; /* temporary placeholder for storing the
115 multitouch fields */
116 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
117 int cc_index; /* contact count field index in the report */
118 int cc_value_index; /* contact count value index in the field */
119 unsigned last_slot_field; /* the last field of a slot */
120 unsigned mt_report_id; /* the report ID of the multitouch device */
121 unsigned long initial_quirks; /* initial quirks state */
122 __s16 inputmode; /* InputMode HID feature, -1 if non-existent */
123 __s16 inputmode_index; /* InputMode HID feature index in the report */
124 __s16 maxcontact_report_id; /* Maximum Contact Number HID feature,
125 -1 if non-existent */
126 __u8 inputmode_value; /* InputMode HID feature value */
127 __u8 num_received; /* how many contacts we received */
128 __u8 num_expected; /* expected last contact index */
129 __u8 maxcontacts;
130 __u8 touches_by_report; /* how many touches are present in one report:
131 * 1 means we should use a serial protocol
132 * > 1 means hybrid (multitouch) protocol */
133 __u8 buttons_count; /* number of physical buttons per touchpad */
134 bool is_buttonpad; /* is this device a button pad? */
135 bool serial_maybe; /* need to check for serial protocol */
136 bool curvalid; /* is the current contact valid? */
137 unsigned mt_flags; /* flags to pass to input-mt */
138 };
139
140 static void mt_post_parse_default_settings(struct mt_device *td);
141 static void mt_post_parse(struct mt_device *td);
142
143 /* classes of device behavior */
144 #define MT_CLS_DEFAULT 0x0001
145
146 #define MT_CLS_SERIAL 0x0002
147 #define MT_CLS_CONFIDENCE 0x0003
148 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
149 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
150 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
151 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
152 /* reserved 0x0008 */
153 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
154 #define MT_CLS_NSMU 0x000a
155 /* reserved 0x0010 */
156 /* reserved 0x0011 */
157 #define MT_CLS_WIN_8 0x0012
158 #define MT_CLS_EXPORT_ALL_INPUTS 0x0013
159 #define MT_CLS_WIN_8_DUAL 0x0014
160
161 /* vendor specific classes */
162 #define MT_CLS_3M 0x0101
163 /* reserved 0x0102 */
164 #define MT_CLS_EGALAX 0x0103
165 #define MT_CLS_EGALAX_SERIAL 0x0104
166 #define MT_CLS_TOPSEED 0x0105
167 #define MT_CLS_PANASONIC 0x0106
168 #define MT_CLS_FLATFROG 0x0107
169 #define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
170 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
171 #define MT_CLS_LG 0x010a
172 #define MT_CLS_VTL 0x0110
173 #define MT_CLS_GOOGLE 0x0111
174
175 #define MT_DEFAULT_MAXCONTACT 10
176 #define MT_MAX_MAXCONTACT 250
177
178 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
179 #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
180
181 /*
182 * these device-dependent functions determine what slot corresponds
183 * to a valid contact that was just read.
184 */
185
186 static int cypress_compute_slot(struct mt_device *td)
187 {
188 if (td->curdata.contactid != 0 || td->num_received == 0)
189 return td->curdata.contactid;
190 else
191 return -1;
192 }
193
194 static struct mt_class mt_classes[] = {
195 { .name = MT_CLS_DEFAULT,
196 .quirks = MT_QUIRK_ALWAYS_VALID |
197 MT_QUIRK_CONTACT_CNT_ACCURATE },
198 { .name = MT_CLS_NSMU,
199 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
200 { .name = MT_CLS_SERIAL,
201 .quirks = MT_QUIRK_ALWAYS_VALID},
202 { .name = MT_CLS_CONFIDENCE,
203 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
204 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
205 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
206 MT_QUIRK_SLOT_IS_CONTACTID },
207 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
208 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
209 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
210 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
211 .quirks = MT_QUIRK_VALID_IS_INRANGE |
212 MT_QUIRK_SLOT_IS_CONTACTID,
213 .maxcontacts = 2 },
214 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
215 .quirks = MT_QUIRK_VALID_IS_INRANGE |
216 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
217 .maxcontacts = 2 },
218 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
219 .quirks = MT_QUIRK_VALID_IS_INRANGE |
220 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
221 { .name = MT_CLS_WIN_8,
222 .quirks = MT_QUIRK_ALWAYS_VALID |
223 MT_QUIRK_IGNORE_DUPLICATES |
224 MT_QUIRK_HOVERING |
225 MT_QUIRK_CONTACT_CNT_ACCURATE |
226 MT_QUIRK_STICKY_FINGERS },
227 { .name = MT_CLS_EXPORT_ALL_INPUTS,
228 .quirks = MT_QUIRK_ALWAYS_VALID |
229 MT_QUIRK_CONTACT_CNT_ACCURATE,
230 .export_all_inputs = true },
231 { .name = MT_CLS_WIN_8_DUAL,
232 .quirks = MT_QUIRK_ALWAYS_VALID |
233 MT_QUIRK_IGNORE_DUPLICATES |
234 MT_QUIRK_HOVERING |
235 MT_QUIRK_CONTACT_CNT_ACCURATE,
236 .export_all_inputs = true },
237
238 /*
239 * vendor specific classes
240 */
241 { .name = MT_CLS_3M,
242 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
243 MT_QUIRK_SLOT_IS_CONTACTID |
244 MT_QUIRK_TOUCH_SIZE_SCALING,
245 .sn_move = 2048,
246 .sn_width = 128,
247 .sn_height = 128,
248 .maxcontacts = 60,
249 },
250 { .name = MT_CLS_EGALAX,
251 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
252 MT_QUIRK_VALID_IS_INRANGE,
253 .sn_move = 4096,
254 .sn_pressure = 32,
255 },
256 { .name = MT_CLS_EGALAX_SERIAL,
257 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
258 MT_QUIRK_ALWAYS_VALID,
259 .sn_move = 4096,
260 .sn_pressure = 32,
261 },
262 { .name = MT_CLS_TOPSEED,
263 .quirks = MT_QUIRK_ALWAYS_VALID,
264 .is_indirect = true,
265 .maxcontacts = 2,
266 },
267 { .name = MT_CLS_PANASONIC,
268 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
269 .maxcontacts = 4 },
270 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
271 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
272 MT_QUIRK_VALID_IS_INRANGE |
273 MT_QUIRK_SLOT_IS_CONTACTID,
274 .maxcontacts = 2
275 },
276 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
277 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
278 MT_QUIRK_SLOT_IS_CONTACTID
279 },
280
281 { .name = MT_CLS_FLATFROG,
282 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
283 MT_QUIRK_NO_AREA,
284 .sn_move = 2048,
285 .maxcontacts = 40,
286 },
287 { .name = MT_CLS_LG,
288 .quirks = MT_QUIRK_ALWAYS_VALID |
289 MT_QUIRK_FIX_CONST_CONTACT_ID |
290 MT_QUIRK_IGNORE_DUPLICATES |
291 MT_QUIRK_HOVERING |
292 MT_QUIRK_CONTACT_CNT_ACCURATE },
293 { .name = MT_CLS_VTL,
294 .quirks = MT_QUIRK_ALWAYS_VALID |
295 MT_QUIRK_CONTACT_CNT_ACCURATE |
296 MT_QUIRK_FORCE_GET_FEATURE,
297 },
298 { .name = MT_CLS_GOOGLE,
299 .quirks = MT_QUIRK_ALWAYS_VALID |
300 MT_QUIRK_CONTACT_CNT_ACCURATE |
301 MT_QUIRK_SLOT_IS_CONTACTID |
302 MT_QUIRK_HOVERING
303 },
304 { }
305 };
306
307 static ssize_t mt_show_quirks(struct device *dev,
308 struct device_attribute *attr,
309 char *buf)
310 {
311 struct hid_device *hdev = to_hid_device(dev);
312 struct mt_device *td = hid_get_drvdata(hdev);
313
314 return sprintf(buf, "%u\n", td->mtclass.quirks);
315 }
316
317 static ssize_t mt_set_quirks(struct device *dev,
318 struct device_attribute *attr,
319 const char *buf, size_t count)
320 {
321 struct hid_device *hdev = to_hid_device(dev);
322 struct mt_device *td = hid_get_drvdata(hdev);
323
324 unsigned long val;
325
326 if (kstrtoul(buf, 0, &val))
327 return -EINVAL;
328
329 td->mtclass.quirks = val;
330
331 if (td->cc_index < 0)
332 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
333
334 return count;
335 }
336
337 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
338
339 static struct attribute *sysfs_attrs[] = {
340 &dev_attr_quirks.attr,
341 NULL
342 };
343
344 static struct attribute_group mt_attribute_group = {
345 .attrs = sysfs_attrs
346 };
347
348 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
349 {
350 struct mt_device *td = hid_get_drvdata(hdev);
351 int ret, size = hid_report_len(report);
352 u8 *buf;
353
354 /*
355 * Do not fetch the feature report if the device has been explicitly
356 * marked as non-capable.
357 */
358 if (td->initial_quirks & HID_QUIRK_NO_INIT_REPORTS)
359 return;
360
361 buf = hid_alloc_report_buf(report, GFP_KERNEL);
362 if (!buf)
363 return;
364
365 ret = hid_hw_raw_request(hdev, report->id, buf, size,
366 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
367 if (ret < 0) {
368 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
369 report->id);
370 } else {
371 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
372 size, 0);
373 if (ret)
374 dev_warn(&hdev->dev, "failed to report feature\n");
375 }
376
377 kfree(buf);
378 }
379
380 static void mt_feature_mapping(struct hid_device *hdev,
381 struct hid_field *field, struct hid_usage *usage)
382 {
383 struct mt_device *td = hid_get_drvdata(hdev);
384
385 switch (usage->hid) {
386 case HID_DG_INPUTMODE:
387 /* Ignore if value index is out of bounds. */
388 if (usage->usage_index >= field->report_count) {
389 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
390 break;
391 }
392
393 if (td->inputmode < 0) {
394 td->inputmode = field->report->id;
395 td->inputmode_index = usage->usage_index;
396 } else {
397 /*
398 * Some elan panels wrongly declare 2 input mode
399 * features, and silently ignore when we set the
400 * value in the second field. Skip the second feature
401 * and hope for the best.
402 */
403 dev_info(&hdev->dev,
404 "Ignoring the extra HID_DG_INPUTMODE\n");
405 }
406
407 break;
408 case HID_DG_CONTACTMAX:
409 mt_get_feature(hdev, field->report);
410
411 td->maxcontact_report_id = field->report->id;
412 td->maxcontacts = field->value[0];
413 if (!td->maxcontacts &&
414 field->logical_maximum <= MT_MAX_MAXCONTACT)
415 td->maxcontacts = field->logical_maximum;
416 if (td->mtclass.maxcontacts)
417 /* check if the maxcontacts is given by the class */
418 td->maxcontacts = td->mtclass.maxcontacts;
419
420 break;
421 case HID_DG_BUTTONTYPE:
422 if (usage->usage_index >= field->report_count) {
423 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
424 break;
425 }
426
427 mt_get_feature(hdev, field->report);
428 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
429 td->is_buttonpad = true;
430
431 break;
432 case 0xff0000c5:
433 /* Retrieve the Win8 blob once to enable some devices */
434 if (usage->usage_index == 0)
435 mt_get_feature(hdev, field->report);
436 break;
437 }
438 }
439
440 static void set_abs(struct input_dev *input, unsigned int code,
441 struct hid_field *field, int snratio)
442 {
443 int fmin = field->logical_minimum;
444 int fmax = field->logical_maximum;
445 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
446 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
447 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
448 }
449
450 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
451 struct hid_input *hi)
452 {
453 struct mt_fields *f = td->fields;
454
455 if (f->length >= HID_MAX_FIELDS)
456 return;
457
458 f->usages[f->length++] = usage->hid;
459 }
460
461 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
462 struct hid_field *field, struct hid_usage *usage,
463 unsigned long **bit, int *max)
464 {
465 struct mt_device *td = hid_get_drvdata(hdev);
466 struct mt_class *cls = &td->mtclass;
467 int code;
468 struct hid_usage *prev_usage = NULL;
469
470 if (field->application == HID_DG_TOUCHSCREEN)
471 td->mt_flags |= INPUT_MT_DIRECT;
472
473 /*
474 * Model touchscreens providing buttons as touchpads.
475 */
476 if (field->application == HID_DG_TOUCHPAD ||
477 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
478 td->mt_flags |= INPUT_MT_POINTER;
479 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
480 }
481
482 /* count the buttons on touchpads */
483 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
484 td->buttons_count++;
485
486 if (usage->usage_index)
487 prev_usage = &field->usage[usage->usage_index - 1];
488
489 switch (usage->hid & HID_USAGE_PAGE) {
490
491 case HID_UP_GENDESK:
492 switch (usage->hid) {
493 case HID_GD_X:
494 if (prev_usage && (prev_usage->hid == usage->hid)) {
495 hid_map_usage(hi, usage, bit, max,
496 EV_ABS, ABS_MT_TOOL_X);
497 set_abs(hi->input, ABS_MT_TOOL_X, field,
498 cls->sn_move);
499 } else {
500 hid_map_usage(hi, usage, bit, max,
501 EV_ABS, ABS_MT_POSITION_X);
502 set_abs(hi->input, ABS_MT_POSITION_X, field,
503 cls->sn_move);
504 }
505
506 mt_store_field(usage, td, hi);
507 return 1;
508 case HID_GD_Y:
509 if (prev_usage && (prev_usage->hid == usage->hid)) {
510 hid_map_usage(hi, usage, bit, max,
511 EV_ABS, ABS_MT_TOOL_Y);
512 set_abs(hi->input, ABS_MT_TOOL_Y, field,
513 cls->sn_move);
514 } else {
515 hid_map_usage(hi, usage, bit, max,
516 EV_ABS, ABS_MT_POSITION_Y);
517 set_abs(hi->input, ABS_MT_POSITION_Y, field,
518 cls->sn_move);
519 }
520
521 mt_store_field(usage, td, hi);
522 return 1;
523 }
524 return 0;
525
526 case HID_UP_DIGITIZER:
527 switch (usage->hid) {
528 case HID_DG_INRANGE:
529 if (cls->quirks & MT_QUIRK_HOVERING) {
530 hid_map_usage(hi, usage, bit, max,
531 EV_ABS, ABS_MT_DISTANCE);
532 input_set_abs_params(hi->input,
533 ABS_MT_DISTANCE, 0, 1, 0, 0);
534 }
535 mt_store_field(usage, td, hi);
536 return 1;
537 case HID_DG_CONFIDENCE:
538 if ((cls->name == MT_CLS_WIN_8 ||
539 cls->name == MT_CLS_WIN_8_DUAL) &&
540 field->application == HID_DG_TOUCHPAD)
541 cls->quirks |= MT_QUIRK_CONFIDENCE;
542 mt_store_field(usage, td, hi);
543 return 1;
544 case HID_DG_TIPSWITCH:
545 hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
546 input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
547 mt_store_field(usage, td, hi);
548 return 1;
549 case HID_DG_CONTACTID:
550 mt_store_field(usage, td, hi);
551 td->touches_by_report++;
552 td->mt_report_id = field->report->id;
553 return 1;
554 case HID_DG_WIDTH:
555 hid_map_usage(hi, usage, bit, max,
556 EV_ABS, ABS_MT_TOUCH_MAJOR);
557 if (!(cls->quirks & MT_QUIRK_NO_AREA))
558 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
559 cls->sn_width);
560 mt_store_field(usage, td, hi);
561 return 1;
562 case HID_DG_HEIGHT:
563 hid_map_usage(hi, usage, bit, max,
564 EV_ABS, ABS_MT_TOUCH_MINOR);
565 if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
566 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
567 cls->sn_height);
568 input_set_abs_params(hi->input,
569 ABS_MT_ORIENTATION, 0, 1, 0, 0);
570 }
571 mt_store_field(usage, td, hi);
572 return 1;
573 case HID_DG_TIPPRESSURE:
574 hid_map_usage(hi, usage, bit, max,
575 EV_ABS, ABS_MT_PRESSURE);
576 set_abs(hi->input, ABS_MT_PRESSURE, field,
577 cls->sn_pressure);
578 mt_store_field(usage, td, hi);
579 return 1;
580 case HID_DG_CONTACTCOUNT:
581 /* Ignore if indexes are out of bounds. */
582 if (field->index >= field->report->maxfield ||
583 usage->usage_index >= field->report_count)
584 return 1;
585 td->cc_index = field->index;
586 td->cc_value_index = usage->usage_index;
587 return 1;
588 case HID_DG_CONTACTMAX:
589 /* we don't set td->last_slot_field as contactcount and
590 * contact max are global to the report */
591 return -1;
592 case HID_DG_TOUCH:
593 /* Legacy devices use TIPSWITCH and not TOUCH.
594 * Let's just ignore this field. */
595 return -1;
596 }
597 /* let hid-input decide for the others */
598 return 0;
599
600 case HID_UP_BUTTON:
601 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
602 /*
603 * MS PTP spec says that external buttons left and right have
604 * usages 2 and 3.
605 */
606 if ((cls->name == MT_CLS_WIN_8 ||
607 cls->name == MT_CLS_WIN_8_DUAL) &&
608 field->application == HID_DG_TOUCHPAD &&
609 (usage->hid & HID_USAGE) > 1)
610 code--;
611 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
612 input_set_capability(hi->input, EV_KEY, code);
613 return 1;
614
615 case 0xff000000:
616 /* we do not want to map these: no input-oriented meaning */
617 return -1;
618 }
619
620 return 0;
621 }
622
623 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
624 {
625 __s32 quirks = td->mtclass.quirks;
626
627 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
628 return td->curdata.contactid;
629
630 if (quirks & MT_QUIRK_CYPRESS)
631 return cypress_compute_slot(td);
632
633 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
634 return td->num_received;
635
636 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
637 return td->curdata.contactid - 1;
638
639 return input_mt_get_slot_by_key(input, td->curdata.contactid);
640 }
641
642 /*
643 * this function is called when a whole contact has been processed,
644 * so that it can assign it to a slot and store the data there
645 */
646 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
647 {
648 if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
649 td->num_received >= td->num_expected)
650 return;
651
652 if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
653 int active;
654 int slotnum = mt_compute_slot(td, input);
655 struct mt_slot *s = &td->curdata;
656 struct input_mt *mt = input->mt;
657
658 if (slotnum < 0 || slotnum >= td->maxcontacts)
659 return;
660
661 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
662 struct input_mt_slot *slot = &mt->slots[slotnum];
663 if (input_mt_is_active(slot) &&
664 input_mt_is_used(mt, slot))
665 return;
666 }
667
668 if (!(td->mtclass.quirks & MT_QUIRK_CONFIDENCE))
669 s->confidence_state = 1;
670 active = (s->touch_state || s->inrange_state) &&
671 s->confidence_state;
672
673 input_mt_slot(input, slotnum);
674 input_mt_report_slot_state(input, MT_TOOL_FINGER, active);
675 if (active) {
676 /* this finger is in proximity of the sensor */
677 int wide = (s->w > s->h);
678 int major = max(s->w, s->h);
679 int minor = min(s->w, s->h);
680
681 /*
682 * divided by two to match visual scale of touch
683 * for devices with this quirk
684 */
685 if (td->mtclass.quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
686 major = major >> 1;
687 minor = minor >> 1;
688 }
689
690 input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
691 input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
692 input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
693 input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
694 input_event(input, EV_ABS, ABS_MT_DISTANCE,
695 !s->touch_state);
696 input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
697 input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
698 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
699 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
700
701 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
702 }
703 }
704
705 td->num_received++;
706 }
707
708 /*
709 * this function is called when a whole packet has been received and processed,
710 * so that it can decide what to send to the input layer.
711 */
712 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
713 {
714 input_mt_sync_frame(input);
715 input_sync(input);
716 td->num_received = 0;
717 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
718 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
719 else
720 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
721 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
722 }
723
724 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
725 struct hid_usage *usage, __s32 value)
726 {
727 /* we will handle the hidinput part later, now remains hiddev */
728 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
729 hid->hiddev_hid_event(hid, field, usage, value);
730
731 return 1;
732 }
733
734 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
735 struct hid_usage *usage, __s32 value)
736 {
737 struct mt_device *td = hid_get_drvdata(hid);
738 __s32 quirks = td->mtclass.quirks;
739 struct input_dev *input = field->hidinput->input;
740
741 if (hid->claimed & HID_CLAIMED_INPUT) {
742 switch (usage->hid) {
743 case HID_DG_INRANGE:
744 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
745 td->curvalid = value;
746 if (quirks & MT_QUIRK_HOVERING)
747 td->curdata.inrange_state = value;
748 break;
749 case HID_DG_TIPSWITCH:
750 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
751 td->curvalid = value;
752 td->curdata.touch_state = value;
753 break;
754 case HID_DG_CONFIDENCE:
755 if (quirks & MT_QUIRK_CONFIDENCE)
756 td->curdata.confidence_state = value;
757 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
758 td->curvalid = value;
759 break;
760 case HID_DG_CONTACTID:
761 td->curdata.contactid = value;
762 break;
763 case HID_DG_TIPPRESSURE:
764 td->curdata.p = value;
765 break;
766 case HID_GD_X:
767 if (usage->code == ABS_MT_TOOL_X)
768 td->curdata.cx = value;
769 else
770 td->curdata.x = value;
771 break;
772 case HID_GD_Y:
773 if (usage->code == ABS_MT_TOOL_Y)
774 td->curdata.cy = value;
775 else
776 td->curdata.y = value;
777 break;
778 case HID_DG_WIDTH:
779 td->curdata.w = value;
780 break;
781 case HID_DG_HEIGHT:
782 td->curdata.h = value;
783 break;
784 case HID_DG_CONTACTCOUNT:
785 break;
786 case HID_DG_TOUCH:
787 /* do nothing */
788 break;
789
790 default:
791 if (usage->type)
792 input_event(input, usage->type, usage->code,
793 value);
794 return;
795 }
796
797 if (usage->usage_index + 1 == field->report_count) {
798 /* we only take into account the last report. */
799 if (usage->hid == td->last_slot_field)
800 mt_complete_slot(td, field->hidinput->input);
801 }
802
803 }
804 }
805
806 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
807 {
808 struct mt_device *td = hid_get_drvdata(hid);
809 struct hid_field *field;
810 unsigned count;
811 int r, n;
812
813 /* sticky fingers release in progress, abort */
814 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
815 return;
816
817 /*
818 * Includes multi-packet support where subsequent
819 * packets are sent with zero contactcount.
820 */
821 if (td->cc_index >= 0) {
822 struct hid_field *field = report->field[td->cc_index];
823 int value = field->value[td->cc_value_index];
824 if (value)
825 td->num_expected = value;
826 }
827
828 for (r = 0; r < report->maxfield; r++) {
829 field = report->field[r];
830 count = field->report_count;
831
832 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
833 continue;
834
835 for (n = 0; n < count; n++)
836 mt_process_mt_event(hid, field, &field->usage[n],
837 field->value[n]);
838 }
839
840 if (td->num_received >= td->num_expected)
841 mt_sync_frame(td, report->field[0]->hidinput->input);
842
843 /*
844 * Windows 8 specs says 2 things:
845 * - once a contact has been reported, it has to be reported in each
846 * subsequent report
847 * - the report rate when fingers are present has to be at least
848 * the refresh rate of the screen, 60 or 120 Hz
849 *
850 * I interprete this that the specification forces a report rate of
851 * at least 60 Hz for a touchscreen to be certified.
852 * Which means that if we do not get a report whithin 16 ms, either
853 * something wrong happens, either the touchscreen forgets to send
854 * a release. Taking a reasonable margin allows to remove issues
855 * with USB communication or the load of the machine.
856 *
857 * Given that Win 8 devices are forced to send a release, this will
858 * only affect laggish machines and the ones that have a firmware
859 * defect.
860 */
861 if (td->mtclass.quirks & MT_QUIRK_STICKY_FINGERS) {
862 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
863 mod_timer(&td->release_timer,
864 jiffies + msecs_to_jiffies(100));
865 else
866 del_timer(&td->release_timer);
867 }
868
869 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
870 }
871
872 static int mt_touch_input_configured(struct hid_device *hdev,
873 struct hid_input *hi)
874 {
875 struct mt_device *td = hid_get_drvdata(hdev);
876 struct mt_class *cls = &td->mtclass;
877 struct input_dev *input = hi->input;
878 int ret;
879
880 if (!td->maxcontacts)
881 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
882
883 mt_post_parse(td);
884 if (td->serial_maybe)
885 mt_post_parse_default_settings(td);
886
887 if (cls->is_indirect)
888 td->mt_flags |= INPUT_MT_POINTER;
889
890 if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
891 td->mt_flags |= INPUT_MT_DROP_UNUSED;
892
893 /* check for clickpads */
894 if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
895 td->is_buttonpad = true;
896
897 if (td->is_buttonpad)
898 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
899
900 ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
901 if (ret)
902 return ret;
903
904 td->mt_flags = 0;
905 return 0;
906 }
907
908 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
909 struct hid_field *field, struct hid_usage *usage,
910 unsigned long **bit, int *max)
911 {
912 struct mt_device *td = hid_get_drvdata(hdev);
913
914 /*
915 * If mtclass.export_all_inputs is not set, only map fields from
916 * TouchScreen or TouchPad collections. We need to ignore fields
917 * that belong to other collections such as Mouse that might have
918 * the same GenericDesktop usages.
919 */
920 if (!td->mtclass.export_all_inputs &&
921 field->application != HID_DG_TOUCHSCREEN &&
922 field->application != HID_DG_PEN &&
923 field->application != HID_DG_TOUCHPAD &&
924 field->application != HID_GD_KEYBOARD &&
925 field->application != HID_CP_CONSUMER_CONTROL)
926 return -1;
927
928 /*
929 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
930 * for the stylus.
931 * The check for mt_report_id ensures we don't process
932 * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
933 * collection, but within the report ID.
934 */
935 if (field->physical == HID_DG_STYLUS)
936 return 0;
937 else if ((field->physical == 0) &&
938 (field->report->id != td->mt_report_id) &&
939 (td->mt_report_id != -1))
940 return 0;
941
942 if (field->application == HID_DG_TOUCHSCREEN ||
943 field->application == HID_DG_TOUCHPAD)
944 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
945
946 /* let hid-core decide for the others */
947 return 0;
948 }
949
950 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
951 struct hid_field *field, struct hid_usage *usage,
952 unsigned long **bit, int *max)
953 {
954 /*
955 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
956 * for the stylus.
957 */
958 if (field->physical == HID_DG_STYLUS)
959 return 0;
960
961 if (field->application == HID_DG_TOUCHSCREEN ||
962 field->application == HID_DG_TOUCHPAD) {
963 /* We own these mappings, tell hid-input to ignore them */
964 return -1;
965 }
966
967 /* let hid-core decide for the others */
968 return 0;
969 }
970
971 static int mt_event(struct hid_device *hid, struct hid_field *field,
972 struct hid_usage *usage, __s32 value)
973 {
974 struct mt_device *td = hid_get_drvdata(hid);
975
976 if (field->report->id == td->mt_report_id)
977 return mt_touch_event(hid, field, usage, value);
978
979 return 0;
980 }
981
982 static void mt_report(struct hid_device *hid, struct hid_report *report)
983 {
984 struct mt_device *td = hid_get_drvdata(hid);
985 struct hid_field *field = report->field[0];
986
987 if (!(hid->claimed & HID_CLAIMED_INPUT))
988 return;
989
990 if (report->id == td->mt_report_id)
991 return mt_touch_report(hid, report);
992
993 if (field && field->hidinput && field->hidinput->input)
994 input_sync(field->hidinput->input);
995 }
996
997 static void mt_set_input_mode(struct hid_device *hdev)
998 {
999 struct mt_device *td = hid_get_drvdata(hdev);
1000 struct hid_report *r;
1001 struct hid_report_enum *re;
1002 struct mt_class *cls = &td->mtclass;
1003 char *buf;
1004 int report_len;
1005
1006 if (td->inputmode < 0)
1007 return;
1008
1009 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
1010 r = re->report_id_hash[td->inputmode];
1011 if (r) {
1012 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1013 report_len = hid_report_len(r);
1014 buf = hid_alloc_report_buf(r, GFP_KERNEL);
1015 if (!buf) {
1016 hid_err(hdev, "failed to allocate buffer for report\n");
1017 return;
1018 }
1019 hid_hw_raw_request(hdev, r->id, buf, report_len,
1020 HID_FEATURE_REPORT,
1021 HID_REQ_GET_REPORT);
1022 kfree(buf);
1023 }
1024 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
1025 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
1026 }
1027 }
1028
1029 static void mt_set_maxcontacts(struct hid_device *hdev)
1030 {
1031 struct mt_device *td = hid_get_drvdata(hdev);
1032 struct hid_report *r;
1033 struct hid_report_enum *re;
1034 int fieldmax, max;
1035
1036 if (td->maxcontact_report_id < 0)
1037 return;
1038
1039 if (!td->mtclass.maxcontacts)
1040 return;
1041
1042 re = &hdev->report_enum[HID_FEATURE_REPORT];
1043 r = re->report_id_hash[td->maxcontact_report_id];
1044 if (r) {
1045 max = td->mtclass.maxcontacts;
1046 fieldmax = r->field[0]->logical_maximum;
1047 max = min(fieldmax, max);
1048 if (r->field[0]->value[0] != max) {
1049 r->field[0]->value[0] = max;
1050 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
1051 }
1052 }
1053 }
1054
1055 static void mt_post_parse_default_settings(struct mt_device *td)
1056 {
1057 __s32 quirks = td->mtclass.quirks;
1058
1059 /* unknown serial device needs special quirks */
1060 if (td->touches_by_report == 1) {
1061 quirks |= MT_QUIRK_ALWAYS_VALID;
1062 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1063 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1064 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1065 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1066 }
1067
1068 td->mtclass.quirks = quirks;
1069 }
1070
1071 static void mt_post_parse(struct mt_device *td)
1072 {
1073 struct mt_fields *f = td->fields;
1074 struct mt_class *cls = &td->mtclass;
1075
1076 if (td->touches_by_report > 0) {
1077 int field_count_per_touch = f->length / td->touches_by_report;
1078 td->last_slot_field = f->usages[field_count_per_touch - 1];
1079 }
1080
1081 if (td->cc_index < 0)
1082 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1083 }
1084
1085 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1086 {
1087 struct mt_device *td = hid_get_drvdata(hdev);
1088 char *name;
1089 const char *suffix = NULL;
1090 struct hid_field *field = hi->report->field[0];
1091 int ret;
1092
1093 if (hi->report->id == td->mt_report_id) {
1094 ret = mt_touch_input_configured(hdev, hi);
1095 if (ret)
1096 return ret;
1097 }
1098
1099 /*
1100 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1101 * for the stylus. Check this first, and then rely on the application
1102 * field.
1103 */
1104 if (hi->report->field[0]->physical == HID_DG_STYLUS) {
1105 suffix = "Pen";
1106 /* force BTN_STYLUS to allow tablet matching in udev */
1107 __set_bit(BTN_STYLUS, hi->input->keybit);
1108 } else {
1109 switch (field->application) {
1110 case HID_GD_KEYBOARD:
1111 suffix = "Keyboard";
1112 break;
1113 case HID_GD_KEYPAD:
1114 suffix = "Keypad";
1115 break;
1116 case HID_GD_MOUSE:
1117 suffix = "Mouse";
1118 break;
1119 case HID_DG_STYLUS:
1120 suffix = "Pen";
1121 /* force BTN_STYLUS to allow tablet matching in udev */
1122 __set_bit(BTN_STYLUS, hi->input->keybit);
1123 break;
1124 case HID_DG_TOUCHSCREEN:
1125 /* we do not set suffix = "Touchscreen" */
1126 break;
1127 case HID_DG_TOUCHPAD:
1128 suffix = "Touchpad";
1129 break;
1130 case HID_GD_SYSTEM_CONTROL:
1131 suffix = "System Control";
1132 break;
1133 case HID_CP_CONSUMER_CONTROL:
1134 suffix = "Consumer Control";
1135 break;
1136 default:
1137 suffix = "UNKNOWN";
1138 break;
1139 }
1140 }
1141
1142 if (suffix) {
1143 name = devm_kzalloc(&hi->input->dev,
1144 strlen(hdev->name) + strlen(suffix) + 2,
1145 GFP_KERNEL);
1146 if (name) {
1147 sprintf(name, "%s %s", hdev->name, suffix);
1148 hi->input->name = name;
1149 }
1150 }
1151
1152 return 0;
1153 }
1154
1155 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1156 {
1157 if (field->usage[0].hid != usage ||
1158 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1159 return;
1160
1161 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1162 field->flags |= HID_MAIN_ITEM_VARIABLE;
1163 }
1164
1165 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1166 {
1167 struct hid_report *report;
1168 int i;
1169
1170 list_for_each_entry(report,
1171 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1172 list) {
1173
1174 if (!report->maxfield)
1175 continue;
1176
1177 for (i = 0; i < report->maxfield; i++)
1178 if (report->field[i]->maxusage >= 1)
1179 mt_fix_const_field(report->field[i], usage);
1180 }
1181 }
1182
1183 static void mt_release_contacts(struct hid_device *hid)
1184 {
1185 struct hid_input *hidinput;
1186 struct mt_device *td = hid_get_drvdata(hid);
1187
1188 list_for_each_entry(hidinput, &hid->inputs, list) {
1189 struct input_dev *input_dev = hidinput->input;
1190 struct input_mt *mt = input_dev->mt;
1191 int i;
1192
1193 if (mt) {
1194 for (i = 0; i < mt->num_slots; i++) {
1195 input_mt_slot(input_dev, i);
1196 input_mt_report_slot_state(input_dev,
1197 MT_TOOL_FINGER,
1198 false);
1199 }
1200 input_mt_sync_frame(input_dev);
1201 input_sync(input_dev);
1202 }
1203 }
1204
1205 td->num_received = 0;
1206 }
1207
1208 static void mt_expired_timeout(unsigned long arg)
1209 {
1210 struct hid_device *hdev = (void *)arg;
1211 struct mt_device *td = hid_get_drvdata(hdev);
1212
1213 /*
1214 * An input report came in just before we release the sticky fingers,
1215 * it will take care of the sticky fingers.
1216 */
1217 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1218 return;
1219 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1220 mt_release_contacts(hdev);
1221 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1222 }
1223
1224 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1225 {
1226 int ret, i;
1227 struct mt_device *td;
1228 struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1229
1230 for (i = 0; mt_classes[i].name ; i++) {
1231 if (id->driver_data == mt_classes[i].name) {
1232 mtclass = &(mt_classes[i]);
1233 break;
1234 }
1235 }
1236
1237 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1238 if (!td) {
1239 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1240 return -ENOMEM;
1241 }
1242 td->mtclass = *mtclass;
1243 td->inputmode = -1;
1244 td->maxcontact_report_id = -1;
1245 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1246 td->cc_index = -1;
1247 td->mt_report_id = -1;
1248 hid_set_drvdata(hdev, td);
1249
1250 td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
1251 GFP_KERNEL);
1252 if (!td->fields) {
1253 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1254 return -ENOMEM;
1255 }
1256
1257 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1258 td->serial_maybe = true;
1259
1260 /*
1261 * Store the initial quirk state
1262 */
1263 td->initial_quirks = hdev->quirks;
1264
1265 /* This allows the driver to correctly support devices
1266 * that emit events over several HID messages.
1267 */
1268 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1269
1270 /*
1271 * This allows the driver to handle different input sensors
1272 * that emits events through different reports on the same HID
1273 * device.
1274 */
1275 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1276 hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
1277
1278 /*
1279 * Some multitouch screens do not like to be polled for input
1280 * reports. Fortunately, the Win8 spec says that all touches
1281 * should be sent during each report, making the initialization
1282 * of input reports unnecessary. For Win7 devices, well, let's hope
1283 * they will still be happy (this is only be a problem if a touch
1284 * was already there while probing the device).
1285 *
1286 * In addition some touchpads do not behave well if we read
1287 * all feature reports from them. Instead we prevent
1288 * initial report fetching and then selectively fetch each
1289 * report we are interested in.
1290 */
1291 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1292
1293 setup_timer(&td->release_timer, mt_expired_timeout, (long)hdev);
1294
1295 ret = hid_parse(hdev);
1296 if (ret != 0)
1297 return ret;
1298
1299 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1300 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1301
1302 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1303 if (ret)
1304 return ret;
1305
1306 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1307 if (ret)
1308 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1309 hdev->name);
1310
1311 mt_set_maxcontacts(hdev);
1312 mt_set_input_mode(hdev);
1313
1314 /* release .fields memory as it is not used anymore */
1315 devm_kfree(&hdev->dev, td->fields);
1316 td->fields = NULL;
1317
1318 return 0;
1319 }
1320
1321 #ifdef CONFIG_PM
1322 static int mt_reset_resume(struct hid_device *hdev)
1323 {
1324 mt_release_contacts(hdev);
1325 mt_set_maxcontacts(hdev);
1326 mt_set_input_mode(hdev);
1327 return 0;
1328 }
1329
1330 static int mt_resume(struct hid_device *hdev)
1331 {
1332 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1333 * It should be safe to send it to other devices too.
1334 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1335
1336 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1337
1338 return 0;
1339 }
1340 #endif
1341
1342 static void mt_remove(struct hid_device *hdev)
1343 {
1344 struct mt_device *td = hid_get_drvdata(hdev);
1345
1346 del_timer_sync(&td->release_timer);
1347
1348 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1349 hid_hw_stop(hdev);
1350 hdev->quirks = td->initial_quirks;
1351 }
1352
1353 /*
1354 * This list contains only:
1355 * - VID/PID of products not working with the default multitouch handling
1356 * - 2 generic rules.
1357 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1358 */
1359 static const struct hid_device_id mt_devices[] = {
1360
1361 /* 3M panels */
1362 { .driver_data = MT_CLS_3M,
1363 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1364 USB_DEVICE_ID_3M1968) },
1365 { .driver_data = MT_CLS_3M,
1366 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1367 USB_DEVICE_ID_3M2256) },
1368 { .driver_data = MT_CLS_3M,
1369 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1370 USB_DEVICE_ID_3M3266) },
1371
1372 /* Alps devices */
1373 { .driver_data = MT_CLS_WIN_8_DUAL,
1374 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1375 USB_VENDOR_ID_ALPS_JP,
1376 HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
1377 { .driver_data = MT_CLS_WIN_8_DUAL,
1378 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1379 USB_VENDOR_ID_ALPS_JP,
1380 HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
1381 { .driver_data = MT_CLS_WIN_8_DUAL,
1382 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1383 USB_VENDOR_ID_ALPS_JP,
1384 HID_DEVICE_ID_ALPS_U1_PTP_2) },
1385
1386 /* Anton devices */
1387 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1388 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1389 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1390
1391 /* Atmel panels */
1392 { .driver_data = MT_CLS_SERIAL,
1393 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1394 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1395
1396 /* Baanto multitouch devices */
1397 { .driver_data = MT_CLS_NSMU,
1398 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1399 USB_DEVICE_ID_BAANTO_MT_190W2) },
1400
1401 /* Cando panels */
1402 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1403 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1404 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1405 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1406 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1407 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1408
1409 /* Chunghwa Telecom touch panels */
1410 { .driver_data = MT_CLS_NSMU,
1411 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1412 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1413
1414 /* CJTouch panels */
1415 { .driver_data = MT_CLS_NSMU,
1416 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1417 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1418 { .driver_data = MT_CLS_NSMU,
1419 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1420 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1421
1422 /* CVTouch panels */
1423 { .driver_data = MT_CLS_NSMU,
1424 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1425 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1426
1427 /* eGalax devices (resistive) */
1428 { .driver_data = MT_CLS_EGALAX,
1429 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1430 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1431 { .driver_data = MT_CLS_EGALAX,
1432 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1433 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1434
1435 /* eGalax devices (capacitive) */
1436 { .driver_data = MT_CLS_EGALAX_SERIAL,
1437 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1438 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1439 { .driver_data = MT_CLS_EGALAX,
1440 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1441 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1442 { .driver_data = MT_CLS_EGALAX_SERIAL,
1443 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1444 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1445 { .driver_data = MT_CLS_EGALAX_SERIAL,
1446 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1447 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1448 { .driver_data = MT_CLS_EGALAX_SERIAL,
1449 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1450 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1451 { .driver_data = MT_CLS_EGALAX_SERIAL,
1452 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1453 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1454 { .driver_data = MT_CLS_EGALAX,
1455 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1456 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1457 { .driver_data = MT_CLS_EGALAX,
1458 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1459 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1460 { .driver_data = MT_CLS_EGALAX_SERIAL,
1461 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1462 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1463 { .driver_data = MT_CLS_EGALAX,
1464 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1465 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1466 { .driver_data = MT_CLS_EGALAX,
1467 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1468 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1469 { .driver_data = MT_CLS_EGALAX,
1470 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1471 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1472 { .driver_data = MT_CLS_EGALAX,
1473 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1474 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1475 { .driver_data = MT_CLS_EGALAX_SERIAL,
1476 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1477 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1478 { .driver_data = MT_CLS_EGALAX_SERIAL,
1479 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1480 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1481 { .driver_data = MT_CLS_EGALAX_SERIAL,
1482 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1483 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1484
1485 /* Elitegroup panel */
1486 { .driver_data = MT_CLS_SERIAL,
1487 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1488 USB_DEVICE_ID_ELITEGROUP_05D8) },
1489
1490 /* Flatfrog Panels */
1491 { .driver_data = MT_CLS_FLATFROG,
1492 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1493 USB_DEVICE_ID_MULTITOUCH_3200) },
1494
1495 /* FocalTech Panels */
1496 { .driver_data = MT_CLS_SERIAL,
1497 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1498 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1499
1500 /* GeneralTouch panel */
1501 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1502 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1503 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1504 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1505 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1506 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1507 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1508 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1509 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1510 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1511 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1512 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1513 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1514 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1515 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1516 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1517 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1518 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1519 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1520 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1521 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1522
1523 /* Gametel game controller */
1524 { .driver_data = MT_CLS_NSMU,
1525 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1526 USB_DEVICE_ID_GAMETEL_MT_MODE) },
1527
1528 /* GoodTouch panels */
1529 { .driver_data = MT_CLS_NSMU,
1530 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1531 USB_DEVICE_ID_GOODTOUCH_000f) },
1532
1533 /* Hanvon panels */
1534 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1535 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1536 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1537
1538 /* Ilitek dual touch panel */
1539 { .driver_data = MT_CLS_NSMU,
1540 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1541 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1542
1543 /* LG Melfas panel */
1544 { .driver_data = MT_CLS_LG,
1545 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1546 USB_DEVICE_ID_LG_MELFAS_MT) },
1547
1548 /* MosArt panels */
1549 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1550 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1551 USB_DEVICE_ID_ASUS_T91MT)},
1552 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1553 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1554 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1555 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1556 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1557 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1558
1559 /* Panasonic panels */
1560 { .driver_data = MT_CLS_PANASONIC,
1561 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1562 USB_DEVICE_ID_PANABOARD_UBT780) },
1563 { .driver_data = MT_CLS_PANASONIC,
1564 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1565 USB_DEVICE_ID_PANABOARD_UBT880) },
1566
1567 /* Novatek Panel */
1568 { .driver_data = MT_CLS_NSMU,
1569 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1570 USB_DEVICE_ID_NOVATEK_PCT) },
1571
1572 /* Ntrig Panel */
1573 { .driver_data = MT_CLS_NSMU,
1574 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1575 USB_VENDOR_ID_NTRIG, 0x1b05) },
1576
1577 /* PixArt optical touch screen */
1578 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1579 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1580 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1581 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1582 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1583 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1584 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1585 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1586 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1587
1588 /* PixCir-based panels */
1589 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1590 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1591 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1592
1593 /* Quanta-based panels */
1594 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1595 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1596 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1597
1598 /* Stantum panels */
1599 { .driver_data = MT_CLS_CONFIDENCE,
1600 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1601 USB_DEVICE_ID_MTP_STM)},
1602
1603 /* TopSeed panels */
1604 { .driver_data = MT_CLS_TOPSEED,
1605 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1606 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1607
1608 /* Touch International panels */
1609 { .driver_data = MT_CLS_NSMU,
1610 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1611 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1612
1613 /* Unitec panels */
1614 { .driver_data = MT_CLS_NSMU,
1615 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1616 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1617 { .driver_data = MT_CLS_NSMU,
1618 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1619 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1620
1621 /* VTL panels */
1622 { .driver_data = MT_CLS_VTL,
1623 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
1624 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
1625
1626 /* Wistron panels */
1627 { .driver_data = MT_CLS_NSMU,
1628 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1629 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1630
1631 /* XAT */
1632 { .driver_data = MT_CLS_NSMU,
1633 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1634 USB_DEVICE_ID_XAT_CSR) },
1635
1636 /* Xiroku */
1637 { .driver_data = MT_CLS_NSMU,
1638 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1639 USB_DEVICE_ID_XIROKU_SPX) },
1640 { .driver_data = MT_CLS_NSMU,
1641 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1642 USB_DEVICE_ID_XIROKU_MPX) },
1643 { .driver_data = MT_CLS_NSMU,
1644 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1645 USB_DEVICE_ID_XIROKU_CSR) },
1646 { .driver_data = MT_CLS_NSMU,
1647 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1648 USB_DEVICE_ID_XIROKU_SPX1) },
1649 { .driver_data = MT_CLS_NSMU,
1650 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1651 USB_DEVICE_ID_XIROKU_MPX1) },
1652 { .driver_data = MT_CLS_NSMU,
1653 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1654 USB_DEVICE_ID_XIROKU_CSR1) },
1655 { .driver_data = MT_CLS_NSMU,
1656 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1657 USB_DEVICE_ID_XIROKU_SPX2) },
1658 { .driver_data = MT_CLS_NSMU,
1659 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1660 USB_DEVICE_ID_XIROKU_MPX2) },
1661 { .driver_data = MT_CLS_NSMU,
1662 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1663 USB_DEVICE_ID_XIROKU_CSR2) },
1664
1665 /* Google MT devices */
1666 { .driver_data = MT_CLS_GOOGLE,
1667 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
1668 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
1669
1670 /* Generic MT device */
1671 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1672
1673 /* Generic Win 8 certified MT device */
1674 { .driver_data = MT_CLS_WIN_8,
1675 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1676 HID_ANY_ID, HID_ANY_ID) },
1677 { }
1678 };
1679 MODULE_DEVICE_TABLE(hid, mt_devices);
1680
1681 static const struct hid_usage_id mt_grabbed_usages[] = {
1682 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1683 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1684 };
1685
1686 static struct hid_driver mt_driver = {
1687 .name = "hid-multitouch",
1688 .id_table = mt_devices,
1689 .probe = mt_probe,
1690 .remove = mt_remove,
1691 .input_mapping = mt_input_mapping,
1692 .input_mapped = mt_input_mapped,
1693 .input_configured = mt_input_configured,
1694 .feature_mapping = mt_feature_mapping,
1695 .usage_table = mt_grabbed_usages,
1696 .event = mt_event,
1697 .report = mt_report,
1698 #ifdef CONFIG_PM
1699 .reset_resume = mt_reset_resume,
1700 .resume = mt_resume,
1701 #endif
1702 };
1703 module_hid_driver(mt_driver);
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