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Merge tag 'upstream-4.13-rc1' of git://git.infradead.org/linux-ubifs
[mirror_ubuntu-bionic-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_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
624 struct hid_field *field, struct hid_usage *usage,
625 unsigned long **bit, int *max)
626 {
627 if (usage->type == EV_KEY || usage->type == EV_ABS)
628 set_bit(usage->type, hi->input->evbit);
629
630 return -1;
631 }
632
633 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
634 {
635 __s32 quirks = td->mtclass.quirks;
636
637 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
638 return td->curdata.contactid;
639
640 if (quirks & MT_QUIRK_CYPRESS)
641 return cypress_compute_slot(td);
642
643 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
644 return td->num_received;
645
646 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
647 return td->curdata.contactid - 1;
648
649 return input_mt_get_slot_by_key(input, td->curdata.contactid);
650 }
651
652 /*
653 * this function is called when a whole contact has been processed,
654 * so that it can assign it to a slot and store the data there
655 */
656 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
657 {
658 if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
659 td->num_received >= td->num_expected)
660 return;
661
662 if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
663 int active;
664 int slotnum = mt_compute_slot(td, input);
665 struct mt_slot *s = &td->curdata;
666 struct input_mt *mt = input->mt;
667
668 if (slotnum < 0 || slotnum >= td->maxcontacts)
669 return;
670
671 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
672 struct input_mt_slot *slot = &mt->slots[slotnum];
673 if (input_mt_is_active(slot) &&
674 input_mt_is_used(mt, slot))
675 return;
676 }
677
678 if (!(td->mtclass.quirks & MT_QUIRK_CONFIDENCE))
679 s->confidence_state = 1;
680 active = (s->touch_state || s->inrange_state) &&
681 s->confidence_state;
682
683 input_mt_slot(input, slotnum);
684 input_mt_report_slot_state(input, MT_TOOL_FINGER, active);
685 if (active) {
686 /* this finger is in proximity of the sensor */
687 int wide = (s->w > s->h);
688 int major = max(s->w, s->h);
689 int minor = min(s->w, s->h);
690
691 /*
692 * divided by two to match visual scale of touch
693 * for devices with this quirk
694 */
695 if (td->mtclass.quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
696 major = major >> 1;
697 minor = minor >> 1;
698 }
699
700 input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
701 input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
702 input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
703 input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
704 input_event(input, EV_ABS, ABS_MT_DISTANCE,
705 !s->touch_state);
706 input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
707 input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
708 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
709 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
710
711 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
712 }
713 }
714
715 td->num_received++;
716 }
717
718 /*
719 * this function is called when a whole packet has been received and processed,
720 * so that it can decide what to send to the input layer.
721 */
722 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
723 {
724 input_mt_sync_frame(input);
725 input_sync(input);
726 td->num_received = 0;
727 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
728 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
729 else
730 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
731 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
732 }
733
734 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
735 struct hid_usage *usage, __s32 value)
736 {
737 /* we will handle the hidinput part later, now remains hiddev */
738 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
739 hid->hiddev_hid_event(hid, field, usage, value);
740
741 return 1;
742 }
743
744 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
745 struct hid_usage *usage, __s32 value)
746 {
747 struct mt_device *td = hid_get_drvdata(hid);
748 __s32 quirks = td->mtclass.quirks;
749 struct input_dev *input = field->hidinput->input;
750
751 if (hid->claimed & HID_CLAIMED_INPUT) {
752 switch (usage->hid) {
753 case HID_DG_INRANGE:
754 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
755 td->curvalid = value;
756 if (quirks & MT_QUIRK_HOVERING)
757 td->curdata.inrange_state = value;
758 break;
759 case HID_DG_TIPSWITCH:
760 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
761 td->curvalid = value;
762 td->curdata.touch_state = value;
763 break;
764 case HID_DG_CONFIDENCE:
765 if (quirks & MT_QUIRK_CONFIDENCE)
766 td->curdata.confidence_state = value;
767 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
768 td->curvalid = value;
769 break;
770 case HID_DG_CONTACTID:
771 td->curdata.contactid = value;
772 break;
773 case HID_DG_TIPPRESSURE:
774 td->curdata.p = value;
775 break;
776 case HID_GD_X:
777 if (usage->code == ABS_MT_TOOL_X)
778 td->curdata.cx = value;
779 else
780 td->curdata.x = value;
781 break;
782 case HID_GD_Y:
783 if (usage->code == ABS_MT_TOOL_Y)
784 td->curdata.cy = value;
785 else
786 td->curdata.y = value;
787 break;
788 case HID_DG_WIDTH:
789 td->curdata.w = value;
790 break;
791 case HID_DG_HEIGHT:
792 td->curdata.h = value;
793 break;
794 case HID_DG_CONTACTCOUNT:
795 break;
796 case HID_DG_TOUCH:
797 /* do nothing */
798 break;
799
800 default:
801 if (usage->type)
802 input_event(input, usage->type, usage->code,
803 value);
804 return;
805 }
806
807 if (usage->usage_index + 1 == field->report_count) {
808 /* we only take into account the last report. */
809 if (usage->hid == td->last_slot_field)
810 mt_complete_slot(td, field->hidinput->input);
811 }
812
813 }
814 }
815
816 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
817 {
818 struct mt_device *td = hid_get_drvdata(hid);
819 struct hid_field *field;
820 unsigned count;
821 int r, n;
822
823 /* sticky fingers release in progress, abort */
824 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
825 return;
826
827 /*
828 * Includes multi-packet support where subsequent
829 * packets are sent with zero contactcount.
830 */
831 if (td->cc_index >= 0) {
832 struct hid_field *field = report->field[td->cc_index];
833 int value = field->value[td->cc_value_index];
834 if (value)
835 td->num_expected = value;
836 }
837
838 for (r = 0; r < report->maxfield; r++) {
839 field = report->field[r];
840 count = field->report_count;
841
842 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
843 continue;
844
845 for (n = 0; n < count; n++)
846 mt_process_mt_event(hid, field, &field->usage[n],
847 field->value[n]);
848 }
849
850 if (td->num_received >= td->num_expected)
851 mt_sync_frame(td, report->field[0]->hidinput->input);
852
853 /*
854 * Windows 8 specs says 2 things:
855 * - once a contact has been reported, it has to be reported in each
856 * subsequent report
857 * - the report rate when fingers are present has to be at least
858 * the refresh rate of the screen, 60 or 120 Hz
859 *
860 * I interprete this that the specification forces a report rate of
861 * at least 60 Hz for a touchscreen to be certified.
862 * Which means that if we do not get a report whithin 16 ms, either
863 * something wrong happens, either the touchscreen forgets to send
864 * a release. Taking a reasonable margin allows to remove issues
865 * with USB communication or the load of the machine.
866 *
867 * Given that Win 8 devices are forced to send a release, this will
868 * only affect laggish machines and the ones that have a firmware
869 * defect.
870 */
871 if (td->mtclass.quirks & MT_QUIRK_STICKY_FINGERS) {
872 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
873 mod_timer(&td->release_timer,
874 jiffies + msecs_to_jiffies(100));
875 else
876 del_timer(&td->release_timer);
877 }
878
879 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
880 }
881
882 static int mt_touch_input_configured(struct hid_device *hdev,
883 struct hid_input *hi)
884 {
885 struct mt_device *td = hid_get_drvdata(hdev);
886 struct mt_class *cls = &td->mtclass;
887 struct input_dev *input = hi->input;
888 int ret;
889
890 if (!td->maxcontacts)
891 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
892
893 mt_post_parse(td);
894 if (td->serial_maybe)
895 mt_post_parse_default_settings(td);
896
897 if (cls->is_indirect)
898 td->mt_flags |= INPUT_MT_POINTER;
899
900 if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
901 td->mt_flags |= INPUT_MT_DROP_UNUSED;
902
903 /* check for clickpads */
904 if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
905 td->is_buttonpad = true;
906
907 if (td->is_buttonpad)
908 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
909
910 ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
911 if (ret)
912 return ret;
913
914 td->mt_flags = 0;
915 return 0;
916 }
917
918 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
919 struct hid_field *field, struct hid_usage *usage,
920 unsigned long **bit, int *max)
921 {
922 struct mt_device *td = hid_get_drvdata(hdev);
923
924 /*
925 * If mtclass.export_all_inputs is not set, only map fields from
926 * TouchScreen or TouchPad collections. We need to ignore fields
927 * that belong to other collections such as Mouse that might have
928 * the same GenericDesktop usages.
929 */
930 if (!td->mtclass.export_all_inputs &&
931 field->application != HID_DG_TOUCHSCREEN &&
932 field->application != HID_DG_PEN &&
933 field->application != HID_DG_TOUCHPAD &&
934 field->application != HID_GD_KEYBOARD &&
935 field->application != HID_CP_CONSUMER_CONTROL)
936 return -1;
937
938 /*
939 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
940 * for the stylus.
941 * The check for mt_report_id ensures we don't process
942 * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
943 * collection, but within the report ID.
944 */
945 if (field->physical == HID_DG_STYLUS)
946 return 0;
947 else if ((field->physical == 0) &&
948 (field->report->id != td->mt_report_id) &&
949 (td->mt_report_id != -1))
950 return 0;
951
952 if (field->application == HID_DG_TOUCHSCREEN ||
953 field->application == HID_DG_TOUCHPAD)
954 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
955
956 /* let hid-core decide for the others */
957 return 0;
958 }
959
960 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
961 struct hid_field *field, struct hid_usage *usage,
962 unsigned long **bit, int *max)
963 {
964 /*
965 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
966 * for the stylus.
967 */
968 if (field->physical == HID_DG_STYLUS)
969 return 0;
970
971 if (field->application == HID_DG_TOUCHSCREEN ||
972 field->application == HID_DG_TOUCHPAD)
973 return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
974
975 /* let hid-core decide for the others */
976 return 0;
977 }
978
979 static int mt_event(struct hid_device *hid, struct hid_field *field,
980 struct hid_usage *usage, __s32 value)
981 {
982 struct mt_device *td = hid_get_drvdata(hid);
983
984 if (field->report->id == td->mt_report_id)
985 return mt_touch_event(hid, field, usage, value);
986
987 return 0;
988 }
989
990 static void mt_report(struct hid_device *hid, struct hid_report *report)
991 {
992 struct mt_device *td = hid_get_drvdata(hid);
993 struct hid_field *field = report->field[0];
994
995 if (!(hid->claimed & HID_CLAIMED_INPUT))
996 return;
997
998 if (report->id == td->mt_report_id)
999 return mt_touch_report(hid, report);
1000
1001 if (field && field->hidinput && field->hidinput->input)
1002 input_sync(field->hidinput->input);
1003 }
1004
1005 static void mt_set_input_mode(struct hid_device *hdev)
1006 {
1007 struct mt_device *td = hid_get_drvdata(hdev);
1008 struct hid_report *r;
1009 struct hid_report_enum *re;
1010 struct mt_class *cls = &td->mtclass;
1011 char *buf;
1012 int report_len;
1013
1014 if (td->inputmode < 0)
1015 return;
1016
1017 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
1018 r = re->report_id_hash[td->inputmode];
1019 if (r) {
1020 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1021 report_len = hid_report_len(r);
1022 buf = hid_alloc_report_buf(r, GFP_KERNEL);
1023 if (!buf) {
1024 hid_err(hdev, "failed to allocate buffer for report\n");
1025 return;
1026 }
1027 hid_hw_raw_request(hdev, r->id, buf, report_len,
1028 HID_FEATURE_REPORT,
1029 HID_REQ_GET_REPORT);
1030 kfree(buf);
1031 }
1032 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
1033 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
1034 }
1035 }
1036
1037 static void mt_set_maxcontacts(struct hid_device *hdev)
1038 {
1039 struct mt_device *td = hid_get_drvdata(hdev);
1040 struct hid_report *r;
1041 struct hid_report_enum *re;
1042 int fieldmax, max;
1043
1044 if (td->maxcontact_report_id < 0)
1045 return;
1046
1047 if (!td->mtclass.maxcontacts)
1048 return;
1049
1050 re = &hdev->report_enum[HID_FEATURE_REPORT];
1051 r = re->report_id_hash[td->maxcontact_report_id];
1052 if (r) {
1053 max = td->mtclass.maxcontacts;
1054 fieldmax = r->field[0]->logical_maximum;
1055 max = min(fieldmax, max);
1056 if (r->field[0]->value[0] != max) {
1057 r->field[0]->value[0] = max;
1058 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
1059 }
1060 }
1061 }
1062
1063 static void mt_post_parse_default_settings(struct mt_device *td)
1064 {
1065 __s32 quirks = td->mtclass.quirks;
1066
1067 /* unknown serial device needs special quirks */
1068 if (td->touches_by_report == 1) {
1069 quirks |= MT_QUIRK_ALWAYS_VALID;
1070 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1071 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1072 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1073 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1074 }
1075
1076 td->mtclass.quirks = quirks;
1077 }
1078
1079 static void mt_post_parse(struct mt_device *td)
1080 {
1081 struct mt_fields *f = td->fields;
1082 struct mt_class *cls = &td->mtclass;
1083
1084 if (td->touches_by_report > 0) {
1085 int field_count_per_touch = f->length / td->touches_by_report;
1086 td->last_slot_field = f->usages[field_count_per_touch - 1];
1087 }
1088
1089 if (td->cc_index < 0)
1090 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1091 }
1092
1093 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1094 {
1095 struct mt_device *td = hid_get_drvdata(hdev);
1096 char *name;
1097 const char *suffix = NULL;
1098 struct hid_field *field = hi->report->field[0];
1099 int ret;
1100
1101 if (hi->report->id == td->mt_report_id) {
1102 ret = mt_touch_input_configured(hdev, hi);
1103 if (ret)
1104 return ret;
1105 }
1106
1107 /*
1108 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1109 * for the stylus. Check this first, and then rely on the application
1110 * field.
1111 */
1112 if (hi->report->field[0]->physical == HID_DG_STYLUS) {
1113 suffix = "Pen";
1114 /* force BTN_STYLUS to allow tablet matching in udev */
1115 __set_bit(BTN_STYLUS, hi->input->keybit);
1116 } else {
1117 switch (field->application) {
1118 case HID_GD_KEYBOARD:
1119 suffix = "Keyboard";
1120 break;
1121 case HID_GD_KEYPAD:
1122 suffix = "Keypad";
1123 break;
1124 case HID_GD_MOUSE:
1125 suffix = "Mouse";
1126 break;
1127 case HID_DG_STYLUS:
1128 suffix = "Pen";
1129 /* force BTN_STYLUS to allow tablet matching in udev */
1130 __set_bit(BTN_STYLUS, hi->input->keybit);
1131 break;
1132 case HID_DG_TOUCHSCREEN:
1133 /* we do not set suffix = "Touchscreen" */
1134 break;
1135 case HID_DG_TOUCHPAD:
1136 suffix = "Touchpad";
1137 break;
1138 case HID_GD_SYSTEM_CONTROL:
1139 suffix = "System Control";
1140 break;
1141 case HID_CP_CONSUMER_CONTROL:
1142 suffix = "Consumer Control";
1143 break;
1144 default:
1145 suffix = "UNKNOWN";
1146 break;
1147 }
1148 }
1149
1150 if (suffix) {
1151 name = devm_kzalloc(&hi->input->dev,
1152 strlen(hdev->name) + strlen(suffix) + 2,
1153 GFP_KERNEL);
1154 if (name) {
1155 sprintf(name, "%s %s", hdev->name, suffix);
1156 hi->input->name = name;
1157 }
1158 }
1159
1160 return 0;
1161 }
1162
1163 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1164 {
1165 if (field->usage[0].hid != usage ||
1166 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1167 return;
1168
1169 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1170 field->flags |= HID_MAIN_ITEM_VARIABLE;
1171 }
1172
1173 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1174 {
1175 struct hid_report *report;
1176 int i;
1177
1178 list_for_each_entry(report,
1179 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1180 list) {
1181
1182 if (!report->maxfield)
1183 continue;
1184
1185 for (i = 0; i < report->maxfield; i++)
1186 if (report->field[i]->maxusage >= 1)
1187 mt_fix_const_field(report->field[i], usage);
1188 }
1189 }
1190
1191 static void mt_release_contacts(struct hid_device *hid)
1192 {
1193 struct hid_input *hidinput;
1194 struct mt_device *td = hid_get_drvdata(hid);
1195
1196 list_for_each_entry(hidinput, &hid->inputs, list) {
1197 struct input_dev *input_dev = hidinput->input;
1198 struct input_mt *mt = input_dev->mt;
1199 int i;
1200
1201 if (mt) {
1202 for (i = 0; i < mt->num_slots; i++) {
1203 input_mt_slot(input_dev, i);
1204 input_mt_report_slot_state(input_dev,
1205 MT_TOOL_FINGER,
1206 false);
1207 }
1208 input_mt_sync_frame(input_dev);
1209 input_sync(input_dev);
1210 }
1211 }
1212
1213 td->num_received = 0;
1214 }
1215
1216 static void mt_expired_timeout(unsigned long arg)
1217 {
1218 struct hid_device *hdev = (void *)arg;
1219 struct mt_device *td = hid_get_drvdata(hdev);
1220
1221 /*
1222 * An input report came in just before we release the sticky fingers,
1223 * it will take care of the sticky fingers.
1224 */
1225 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1226 return;
1227 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1228 mt_release_contacts(hdev);
1229 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1230 }
1231
1232 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1233 {
1234 int ret, i;
1235 struct mt_device *td;
1236 struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1237
1238 for (i = 0; mt_classes[i].name ; i++) {
1239 if (id->driver_data == mt_classes[i].name) {
1240 mtclass = &(mt_classes[i]);
1241 break;
1242 }
1243 }
1244
1245 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1246 if (!td) {
1247 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1248 return -ENOMEM;
1249 }
1250 td->mtclass = *mtclass;
1251 td->inputmode = -1;
1252 td->maxcontact_report_id = -1;
1253 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1254 td->cc_index = -1;
1255 td->mt_report_id = -1;
1256 hid_set_drvdata(hdev, td);
1257
1258 td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
1259 GFP_KERNEL);
1260 if (!td->fields) {
1261 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1262 return -ENOMEM;
1263 }
1264
1265 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1266 td->serial_maybe = true;
1267
1268 /*
1269 * Store the initial quirk state
1270 */
1271 td->initial_quirks = hdev->quirks;
1272
1273 /* This allows the driver to correctly support devices
1274 * that emit events over several HID messages.
1275 */
1276 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1277
1278 /*
1279 * This allows the driver to handle different input sensors
1280 * that emits events through different reports on the same HID
1281 * device.
1282 */
1283 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1284 hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
1285
1286 /*
1287 * Some multitouch screens do not like to be polled for input
1288 * reports. Fortunately, the Win8 spec says that all touches
1289 * should be sent during each report, making the initialization
1290 * of input reports unnecessary. For Win7 devices, well, let's hope
1291 * they will still be happy (this is only be a problem if a touch
1292 * was already there while probing the device).
1293 *
1294 * In addition some touchpads do not behave well if we read
1295 * all feature reports from them. Instead we prevent
1296 * initial report fetching and then selectively fetch each
1297 * report we are interested in.
1298 */
1299 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1300
1301 setup_timer(&td->release_timer, mt_expired_timeout, (long)hdev);
1302
1303 ret = hid_parse(hdev);
1304 if (ret != 0)
1305 return ret;
1306
1307 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1308 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1309
1310 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1311 if (ret)
1312 return ret;
1313
1314 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1315 if (ret)
1316 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1317 hdev->name);
1318
1319 mt_set_maxcontacts(hdev);
1320 mt_set_input_mode(hdev);
1321
1322 /* release .fields memory as it is not used anymore */
1323 devm_kfree(&hdev->dev, td->fields);
1324 td->fields = NULL;
1325
1326 return 0;
1327 }
1328
1329 #ifdef CONFIG_PM
1330 static int mt_reset_resume(struct hid_device *hdev)
1331 {
1332 mt_release_contacts(hdev);
1333 mt_set_maxcontacts(hdev);
1334 mt_set_input_mode(hdev);
1335 return 0;
1336 }
1337
1338 static int mt_resume(struct hid_device *hdev)
1339 {
1340 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1341 * It should be safe to send it to other devices too.
1342 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1343
1344 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1345
1346 return 0;
1347 }
1348 #endif
1349
1350 static void mt_remove(struct hid_device *hdev)
1351 {
1352 struct mt_device *td = hid_get_drvdata(hdev);
1353
1354 del_timer_sync(&td->release_timer);
1355
1356 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1357 hid_hw_stop(hdev);
1358 hdev->quirks = td->initial_quirks;
1359 }
1360
1361 /*
1362 * This list contains only:
1363 * - VID/PID of products not working with the default multitouch handling
1364 * - 2 generic rules.
1365 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1366 */
1367 static const struct hid_device_id mt_devices[] = {
1368
1369 /* 3M panels */
1370 { .driver_data = MT_CLS_3M,
1371 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1372 USB_DEVICE_ID_3M1968) },
1373 { .driver_data = MT_CLS_3M,
1374 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1375 USB_DEVICE_ID_3M2256) },
1376 { .driver_data = MT_CLS_3M,
1377 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1378 USB_DEVICE_ID_3M3266) },
1379
1380 /* Alps devices */
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_DUAL_PTP) },
1385 { .driver_data = MT_CLS_WIN_8_DUAL,
1386 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1387 USB_VENDOR_ID_ALPS_JP,
1388 HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
1389
1390 /* Anton devices */
1391 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1392 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1393 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1394
1395 /* Atmel panels */
1396 { .driver_data = MT_CLS_SERIAL,
1397 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1398 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1399
1400 /* Baanto multitouch devices */
1401 { .driver_data = MT_CLS_NSMU,
1402 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1403 USB_DEVICE_ID_BAANTO_MT_190W2) },
1404
1405 /* Cando panels */
1406 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1407 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1408 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1409 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1410 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1411 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1412
1413 /* Chunghwa Telecom touch panels */
1414 { .driver_data = MT_CLS_NSMU,
1415 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1416 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1417
1418 /* CJTouch panels */
1419 { .driver_data = MT_CLS_NSMU,
1420 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1421 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1422 { .driver_data = MT_CLS_NSMU,
1423 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1424 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1425
1426 /* CVTouch panels */
1427 { .driver_data = MT_CLS_NSMU,
1428 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1429 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1430
1431 /* eGalax devices (resistive) */
1432 { .driver_data = MT_CLS_EGALAX,
1433 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1434 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1435 { .driver_data = MT_CLS_EGALAX,
1436 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1437 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1438
1439 /* eGalax devices (capacitive) */
1440 { .driver_data = MT_CLS_EGALAX_SERIAL,
1441 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1442 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1443 { .driver_data = MT_CLS_EGALAX,
1444 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1445 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1446 { .driver_data = MT_CLS_EGALAX_SERIAL,
1447 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1448 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1449 { .driver_data = MT_CLS_EGALAX_SERIAL,
1450 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1451 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1452 { .driver_data = MT_CLS_EGALAX_SERIAL,
1453 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1454 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1455 { .driver_data = MT_CLS_EGALAX_SERIAL,
1456 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1457 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1458 { .driver_data = MT_CLS_EGALAX,
1459 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1460 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1461 { .driver_data = MT_CLS_EGALAX,
1462 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1463 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1464 { .driver_data = MT_CLS_EGALAX_SERIAL,
1465 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1466 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1467 { .driver_data = MT_CLS_EGALAX,
1468 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1469 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1470 { .driver_data = MT_CLS_EGALAX,
1471 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1472 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1473 { .driver_data = MT_CLS_EGALAX,
1474 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1475 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1476 { .driver_data = MT_CLS_EGALAX,
1477 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1478 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1479 { .driver_data = MT_CLS_EGALAX_SERIAL,
1480 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1481 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1482 { .driver_data = MT_CLS_EGALAX_SERIAL,
1483 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1484 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1485 { .driver_data = MT_CLS_EGALAX_SERIAL,
1486 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1487 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1488
1489 /* Elitegroup panel */
1490 { .driver_data = MT_CLS_SERIAL,
1491 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1492 USB_DEVICE_ID_ELITEGROUP_05D8) },
1493
1494 /* Flatfrog Panels */
1495 { .driver_data = MT_CLS_FLATFROG,
1496 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1497 USB_DEVICE_ID_MULTITOUCH_3200) },
1498
1499 /* FocalTech Panels */
1500 { .driver_data = MT_CLS_SERIAL,
1501 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1502 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1503
1504 /* GeneralTouch panel */
1505 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1506 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1507 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1508 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1509 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1510 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1511 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1512 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1513 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1514 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1515 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1516 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1517 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1518 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1519 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1520 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1521 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1522 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1523 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1524 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1525 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1526
1527 /* Gametel game controller */
1528 { .driver_data = MT_CLS_NSMU,
1529 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1530 USB_DEVICE_ID_GAMETEL_MT_MODE) },
1531
1532 /* GoodTouch panels */
1533 { .driver_data = MT_CLS_NSMU,
1534 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1535 USB_DEVICE_ID_GOODTOUCH_000f) },
1536
1537 /* Hanvon panels */
1538 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1539 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1540 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1541
1542 /* Ilitek dual touch panel */
1543 { .driver_data = MT_CLS_NSMU,
1544 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1545 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1546
1547 /* LG Melfas panel */
1548 { .driver_data = MT_CLS_LG,
1549 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1550 USB_DEVICE_ID_LG_MELFAS_MT) },
1551
1552 /* MosArt panels */
1553 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1554 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1555 USB_DEVICE_ID_ASUS_T91MT)},
1556 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1557 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1558 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1559 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1560 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1561 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1562
1563 /* Panasonic panels */
1564 { .driver_data = MT_CLS_PANASONIC,
1565 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1566 USB_DEVICE_ID_PANABOARD_UBT780) },
1567 { .driver_data = MT_CLS_PANASONIC,
1568 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1569 USB_DEVICE_ID_PANABOARD_UBT880) },
1570
1571 /* Novatek Panel */
1572 { .driver_data = MT_CLS_NSMU,
1573 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1574 USB_DEVICE_ID_NOVATEK_PCT) },
1575
1576 /* Ntrig Panel */
1577 { .driver_data = MT_CLS_NSMU,
1578 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1579 USB_VENDOR_ID_NTRIG, 0x1b05) },
1580
1581 /* PixArt optical touch screen */
1582 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1583 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1584 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1585 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1586 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1587 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1588 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1589 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1590 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1591
1592 /* PixCir-based panels */
1593 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1594 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1595 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1596
1597 /* Quanta-based panels */
1598 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1599 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1600 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1601
1602 /* Stantum panels */
1603 { .driver_data = MT_CLS_CONFIDENCE,
1604 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1605 USB_DEVICE_ID_MTP_STM)},
1606
1607 /* TopSeed panels */
1608 { .driver_data = MT_CLS_TOPSEED,
1609 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1610 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1611
1612 /* Touch International panels */
1613 { .driver_data = MT_CLS_NSMU,
1614 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1615 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1616
1617 /* Unitec panels */
1618 { .driver_data = MT_CLS_NSMU,
1619 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1620 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1621 { .driver_data = MT_CLS_NSMU,
1622 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1623 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1624
1625 /* VTL panels */
1626 { .driver_data = MT_CLS_VTL,
1627 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
1628 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
1629
1630 /* Wistron panels */
1631 { .driver_data = MT_CLS_NSMU,
1632 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1633 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1634
1635 /* XAT */
1636 { .driver_data = MT_CLS_NSMU,
1637 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1638 USB_DEVICE_ID_XAT_CSR) },
1639
1640 /* Xiroku */
1641 { .driver_data = MT_CLS_NSMU,
1642 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1643 USB_DEVICE_ID_XIROKU_SPX) },
1644 { .driver_data = MT_CLS_NSMU,
1645 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1646 USB_DEVICE_ID_XIROKU_MPX) },
1647 { .driver_data = MT_CLS_NSMU,
1648 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1649 USB_DEVICE_ID_XIROKU_CSR) },
1650 { .driver_data = MT_CLS_NSMU,
1651 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1652 USB_DEVICE_ID_XIROKU_SPX1) },
1653 { .driver_data = MT_CLS_NSMU,
1654 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1655 USB_DEVICE_ID_XIROKU_MPX1) },
1656 { .driver_data = MT_CLS_NSMU,
1657 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1658 USB_DEVICE_ID_XIROKU_CSR1) },
1659 { .driver_data = MT_CLS_NSMU,
1660 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1661 USB_DEVICE_ID_XIROKU_SPX2) },
1662 { .driver_data = MT_CLS_NSMU,
1663 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1664 USB_DEVICE_ID_XIROKU_MPX2) },
1665 { .driver_data = MT_CLS_NSMU,
1666 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1667 USB_DEVICE_ID_XIROKU_CSR2) },
1668
1669 /* Google MT devices */
1670 { .driver_data = MT_CLS_GOOGLE,
1671 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
1672 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
1673
1674 /* Generic MT device */
1675 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1676
1677 /* Generic Win 8 certified MT device */
1678 { .driver_data = MT_CLS_WIN_8,
1679 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1680 HID_ANY_ID, HID_ANY_ID) },
1681 { }
1682 };
1683 MODULE_DEVICE_TABLE(hid, mt_devices);
1684
1685 static const struct hid_usage_id mt_grabbed_usages[] = {
1686 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1687 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1688 };
1689
1690 static struct hid_driver mt_driver = {
1691 .name = "hid-multitouch",
1692 .id_table = mt_devices,
1693 .probe = mt_probe,
1694 .remove = mt_remove,
1695 .input_mapping = mt_input_mapping,
1696 .input_mapped = mt_input_mapped,
1697 .input_configured = mt_input_configured,
1698 .feature_mapping = mt_feature_mapping,
1699 .usage_table = mt_grabbed_usages,
1700 .event = mt_event,
1701 .report = mt_report,
1702 #ifdef CONFIG_PM
1703 .reset_resume = mt_reset_resume,
1704 .resume = mt_resume,
1705 #endif
1706 };
1707 module_hid_driver(mt_driver);
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