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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
48
49MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
50MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
51MODULE_DESCRIPTION("HID multitouch panels");
52MODULE_LICENSE("GPL");
53
54#include "hid-ids.h"
55
56/* quirks to control the device */
57#define MT_QUIRK_NOT_SEEN_MEANS_UP (1 << 0)
58#define MT_QUIRK_SLOT_IS_CONTACTID (1 << 1)
59#define MT_QUIRK_CYPRESS (1 << 2)
60#define MT_QUIRK_SLOT_IS_CONTACTNUMBER (1 << 3)
61#define MT_QUIRK_ALWAYS_VALID (1 << 4)
62#define MT_QUIRK_VALID_IS_INRANGE (1 << 5)
63#define MT_QUIRK_VALID_IS_CONFIDENCE (1 << 6)
64#define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE (1 << 8)
65#define MT_QUIRK_NO_AREA (1 << 9)
66#define MT_QUIRK_IGNORE_DUPLICATES (1 << 10)
67#define MT_QUIRK_HOVERING (1 << 11)
68#define MT_QUIRK_CONTACT_CNT_ACCURATE (1 << 12)
69#define MT_QUIRK_FORCE_GET_FEATURE (1 << 13)
70
71#define MT_INPUTMODE_TOUCHSCREEN 0x02
72#define MT_INPUTMODE_TOUCHPAD 0x03
73
74#define MT_BUTTONTYPE_CLICKPAD 0
75
76struct mt_slot {
77 __s32 x, y, cx, cy, p, w, h;
78 __s32 contactid; /* the device ContactID assigned to this slot */
79 bool touch_state; /* is the touch valid? */
80 bool inrange_state; /* is the finger in proximity of the sensor? */
81};
82
83struct mt_class {
84 __s32 name; /* MT_CLS */
85 __s32 quirks;
86 __s32 sn_move; /* Signal/noise ratio for move events */
87 __s32 sn_width; /* Signal/noise ratio for width events */
88 __s32 sn_height; /* Signal/noise ratio for height events */
89 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
90 __u8 maxcontacts;
91 bool is_indirect; /* true for touchpads */
92 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
93};
94
95struct mt_fields {
96 unsigned usages[HID_MAX_FIELDS];
97 unsigned int length;
98};
99
100struct mt_device {
101 struct mt_slot curdata; /* placeholder of incoming data */
102 struct mt_class mtclass; /* our mt device class */
103 struct mt_fields *fields; /* temporary placeholder for storing the
104 multitouch fields */
105 int cc_index; /* contact count field index in the report */
106 int cc_value_index; /* contact count value index in the field */
107 unsigned last_slot_field; /* the last field of a slot */
108 unsigned mt_report_id; /* the report ID of the multitouch device */
109 __s16 inputmode; /* InputMode HID feature, -1 if non-existent */
110 __s16 inputmode_index; /* InputMode HID feature index in the report */
111 __s16 maxcontact_report_id; /* Maximum Contact Number HID feature,
112 -1 if non-existent */
113 __u8 inputmode_value; /* InputMode HID feature value */
114 __u8 num_received; /* how many contacts we received */
115 __u8 num_expected; /* expected last contact index */
116 __u8 maxcontacts;
117 __u8 touches_by_report; /* how many touches are present in one report:
118 * 1 means we should use a serial protocol
119 * > 1 means hybrid (multitouch) protocol */
120 __u8 buttons_count; /* number of physical buttons per touchpad */
121 bool is_buttonpad; /* is this device a button pad? */
122 bool serial_maybe; /* need to check for serial protocol */
123 bool curvalid; /* is the current contact valid? */
124 unsigned mt_flags; /* flags to pass to input-mt */
125};
126
127static void mt_post_parse_default_settings(struct mt_device *td);
128static void mt_post_parse(struct mt_device *td);
129
130/* classes of device behavior */
131#define MT_CLS_DEFAULT 0x0001
132
133#define MT_CLS_SERIAL 0x0002
134#define MT_CLS_CONFIDENCE 0x0003
135#define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
136#define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
137#define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
138#define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
139/* reserved 0x0008 */
140#define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
141#define MT_CLS_NSMU 0x000a
142/* reserved 0x0010 */
143/* reserved 0x0011 */
144#define MT_CLS_WIN_8 0x0012
145#define MT_CLS_EXPORT_ALL_INPUTS 0x0013
146
147/* vendor specific classes */
148#define MT_CLS_3M 0x0101
149/* reserved 0x0102 */
150#define MT_CLS_EGALAX 0x0103
151#define MT_CLS_EGALAX_SERIAL 0x0104
152#define MT_CLS_TOPSEED 0x0105
153#define MT_CLS_PANASONIC 0x0106
154#define MT_CLS_FLATFROG 0x0107
155#define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
156#define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
157#define MT_CLS_VTL 0x0110
158
159#define MT_DEFAULT_MAXCONTACT 10
160#define MT_MAX_MAXCONTACT 250
161
162#define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
163#define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
164
165/*
166 * these device-dependent functions determine what slot corresponds
167 * to a valid contact that was just read.
168 */
169
170static int cypress_compute_slot(struct mt_device *td)
171{
172 if (td->curdata.contactid != 0 || td->num_received == 0)
173 return td->curdata.contactid;
174 else
175 return -1;
176}
177
178static struct mt_class mt_classes[] = {
179 { .name = MT_CLS_DEFAULT,
180 .quirks = MT_QUIRK_ALWAYS_VALID |
181 MT_QUIRK_CONTACT_CNT_ACCURATE },
182 { .name = MT_CLS_NSMU,
183 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
184 { .name = MT_CLS_SERIAL,
185 .quirks = MT_QUIRK_ALWAYS_VALID},
186 { .name = MT_CLS_CONFIDENCE,
187 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
188 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
189 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
190 MT_QUIRK_SLOT_IS_CONTACTID },
191 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
192 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
193 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
194 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
195 .quirks = MT_QUIRK_VALID_IS_INRANGE |
196 MT_QUIRK_SLOT_IS_CONTACTID,
197 .maxcontacts = 2 },
198 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
199 .quirks = MT_QUIRK_VALID_IS_INRANGE |
200 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
201 .maxcontacts = 2 },
202 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
203 .quirks = MT_QUIRK_VALID_IS_INRANGE |
204 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
205 { .name = MT_CLS_WIN_8,
206 .quirks = MT_QUIRK_ALWAYS_VALID |
207 MT_QUIRK_IGNORE_DUPLICATES |
208 MT_QUIRK_HOVERING |
209 MT_QUIRK_CONTACT_CNT_ACCURATE },
210 { .name = MT_CLS_EXPORT_ALL_INPUTS,
211 .quirks = MT_QUIRK_ALWAYS_VALID |
212 MT_QUIRK_CONTACT_CNT_ACCURATE,
213 .export_all_inputs = true },
214
215 /*
216 * vendor specific classes
217 */
218 { .name = MT_CLS_3M,
219 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
220 MT_QUIRK_SLOT_IS_CONTACTID,
221 .sn_move = 2048,
222 .sn_width = 128,
223 .sn_height = 128,
224 .maxcontacts = 60,
225 },
226 { .name = MT_CLS_EGALAX,
227 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
228 MT_QUIRK_VALID_IS_INRANGE,
229 .sn_move = 4096,
230 .sn_pressure = 32,
231 },
232 { .name = MT_CLS_EGALAX_SERIAL,
233 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
234 MT_QUIRK_ALWAYS_VALID,
235 .sn_move = 4096,
236 .sn_pressure = 32,
237 },
238 { .name = MT_CLS_TOPSEED,
239 .quirks = MT_QUIRK_ALWAYS_VALID,
240 .is_indirect = true,
241 .maxcontacts = 2,
242 },
243 { .name = MT_CLS_PANASONIC,
244 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
245 .maxcontacts = 4 },
246 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
247 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
248 MT_QUIRK_VALID_IS_INRANGE |
249 MT_QUIRK_SLOT_IS_CONTACTID,
250 .maxcontacts = 2
251 },
252 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
253 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
254 MT_QUIRK_SLOT_IS_CONTACTID
255 },
256
257 { .name = MT_CLS_FLATFROG,
258 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
259 MT_QUIRK_NO_AREA,
260 .sn_move = 2048,
261 .maxcontacts = 40,
262 },
263 { .name = MT_CLS_VTL,
264 .quirks = MT_QUIRK_ALWAYS_VALID |
265 MT_QUIRK_CONTACT_CNT_ACCURATE |
266 MT_QUIRK_FORCE_GET_FEATURE,
267 },
268 { }
269};
270
271static ssize_t mt_show_quirks(struct device *dev,
272 struct device_attribute *attr,
273 char *buf)
274{
275 struct hid_device *hdev = to_hid_device(dev);
276 struct mt_device *td = hid_get_drvdata(hdev);
277
278 return sprintf(buf, "%u\n", td->mtclass.quirks);
279}
280
281static ssize_t mt_set_quirks(struct device *dev,
282 struct device_attribute *attr,
283 const char *buf, size_t count)
284{
285 struct hid_device *hdev = to_hid_device(dev);
286 struct mt_device *td = hid_get_drvdata(hdev);
287
288 unsigned long val;
289
290 if (kstrtoul(buf, 0, &val))
291 return -EINVAL;
292
293 td->mtclass.quirks = val;
294
295 if (td->cc_index < 0)
296 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
297
298 return count;
299}
300
301static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
302
303static struct attribute *sysfs_attrs[] = {
304 &dev_attr_quirks.attr,
305 NULL
306};
307
308static struct attribute_group mt_attribute_group = {
309 .attrs = sysfs_attrs
310};
311
312static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
313{
314 struct mt_device *td = hid_get_drvdata(hdev);
315 int ret, size = hid_report_len(report);
316 u8 *buf;
317
318 /*
319 * Only fetch the feature report if initial reports are not already
320 * been retrieved. Currently this is only done for Windows 8 touch
321 * devices.
322 */
323 if (!(hdev->quirks & HID_QUIRK_NO_INIT_REPORTS))
324 return;
325 if (td->mtclass.name != MT_CLS_WIN_8)
326 return;
327
328 buf = hid_alloc_report_buf(report, GFP_KERNEL);
329 if (!buf)
330 return;
331
332 ret = hid_hw_raw_request(hdev, report->id, buf, size,
333 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
334 if (ret < 0) {
335 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
336 report->id);
337 } else {
338 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
339 size, 0);
340 if (ret)
341 dev_warn(&hdev->dev, "failed to report feature\n");
342 }
343
344 kfree(buf);
345}
346
347static void mt_feature_mapping(struct hid_device *hdev,
348 struct hid_field *field, struct hid_usage *usage)
349{
350 struct mt_device *td = hid_get_drvdata(hdev);
351
352 switch (usage->hid) {
353 case HID_DG_INPUTMODE:
354 /* Ignore if value index is out of bounds. */
355 if (usage->usage_index >= field->report_count) {
356 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
357 break;
358 }
359
360 if (td->inputmode < 0) {
361 td->inputmode = field->report->id;
362 td->inputmode_index = usage->usage_index;
363 } else {
364 /*
365 * Some elan panels wrongly declare 2 input mode
366 * features, and silently ignore when we set the
367 * value in the second field. Skip the second feature
368 * and hope for the best.
369 */
370 dev_info(&hdev->dev,
371 "Ignoring the extra HID_DG_INPUTMODE\n");
372 }
373
374 break;
375 case HID_DG_CONTACTMAX:
376 mt_get_feature(hdev, field->report);
377
378 td->maxcontact_report_id = field->report->id;
379 td->maxcontacts = field->value[0];
380 if (!td->maxcontacts &&
381 field->logical_maximum <= MT_MAX_MAXCONTACT)
382 td->maxcontacts = field->logical_maximum;
383 if (td->mtclass.maxcontacts)
384 /* check if the maxcontacts is given by the class */
385 td->maxcontacts = td->mtclass.maxcontacts;
386
387 break;
388 case HID_DG_BUTTONTYPE:
389 if (usage->usage_index >= field->report_count) {
390 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
391 break;
392 }
393
394 mt_get_feature(hdev, field->report);
395 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
396 td->is_buttonpad = true;
397
398 break;
399 case 0xff0000c5:
400 /* Retrieve the Win8 blob once to enable some devices */
401 if (usage->usage_index == 0)
402 mt_get_feature(hdev, field->report);
403 break;
404 }
405}
406
407static void set_abs(struct input_dev *input, unsigned int code,
408 struct hid_field *field, int snratio)
409{
410 int fmin = field->logical_minimum;
411 int fmax = field->logical_maximum;
412 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
413 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
414 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
415}
416
417static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
418 struct hid_input *hi)
419{
420 struct mt_fields *f = td->fields;
421
422 if (f->length >= HID_MAX_FIELDS)
423 return;
424
425 f->usages[f->length++] = usage->hid;
426}
427
428static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
429 struct hid_field *field, struct hid_usage *usage,
430 unsigned long **bit, int *max)
431{
432 struct mt_device *td = hid_get_drvdata(hdev);
433 struct mt_class *cls = &td->mtclass;
434 int code;
435 struct hid_usage *prev_usage = NULL;
436
437 if (field->application == HID_DG_TOUCHSCREEN)
438 td->mt_flags |= INPUT_MT_DIRECT;
439
440 /*
441 * Model touchscreens providing buttons as touchpads.
442 */
443 if (field->application == HID_DG_TOUCHPAD ||
444 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
445 td->mt_flags |= INPUT_MT_POINTER;
446 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
447 }
448
449 /* count the buttons on touchpads */
450 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
451 td->buttons_count++;
452
453 if (usage->usage_index)
454 prev_usage = &field->usage[usage->usage_index - 1];
455
456 switch (usage->hid & HID_USAGE_PAGE) {
457
458 case HID_UP_GENDESK:
459 switch (usage->hid) {
460 case HID_GD_X:
461 if (prev_usage && (prev_usage->hid == usage->hid)) {
462 hid_map_usage(hi, usage, bit, max,
463 EV_ABS, ABS_MT_TOOL_X);
464 set_abs(hi->input, ABS_MT_TOOL_X, field,
465 cls->sn_move);
466 } else {
467 hid_map_usage(hi, usage, bit, max,
468 EV_ABS, ABS_MT_POSITION_X);
469 set_abs(hi->input, ABS_MT_POSITION_X, field,
470 cls->sn_move);
471 }
472
473 mt_store_field(usage, td, hi);
474 return 1;
475 case HID_GD_Y:
476 if (prev_usage && (prev_usage->hid == usage->hid)) {
477 hid_map_usage(hi, usage, bit, max,
478 EV_ABS, ABS_MT_TOOL_Y);
479 set_abs(hi->input, ABS_MT_TOOL_Y, field,
480 cls->sn_move);
481 } else {
482 hid_map_usage(hi, usage, bit, max,
483 EV_ABS, ABS_MT_POSITION_Y);
484 set_abs(hi->input, ABS_MT_POSITION_Y, field,
485 cls->sn_move);
486 }
487
488 mt_store_field(usage, td, hi);
489 return 1;
490 }
491 return 0;
492
493 case HID_UP_DIGITIZER:
494 switch (usage->hid) {
495 case HID_DG_INRANGE:
496 if (cls->quirks & MT_QUIRK_HOVERING) {
497 hid_map_usage(hi, usage, bit, max,
498 EV_ABS, ABS_MT_DISTANCE);
499 input_set_abs_params(hi->input,
500 ABS_MT_DISTANCE, 0, 1, 0, 0);
501 }
502 mt_store_field(usage, td, hi);
503 return 1;
504 case HID_DG_CONFIDENCE:
505 if (cls->name == MT_CLS_WIN_8 &&
506 field->application == HID_DG_TOUCHPAD) {
507 cls->quirks &= ~MT_QUIRK_ALWAYS_VALID;
508 cls->quirks |= MT_QUIRK_VALID_IS_CONFIDENCE;
509 }
510 mt_store_field(usage, td, hi);
511 return 1;
512 case HID_DG_TIPSWITCH:
513 hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
514 input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
515 mt_store_field(usage, td, hi);
516 return 1;
517 case HID_DG_CONTACTID:
518 mt_store_field(usage, td, hi);
519 td->touches_by_report++;
520 td->mt_report_id = field->report->id;
521 return 1;
522 case HID_DG_WIDTH:
523 hid_map_usage(hi, usage, bit, max,
524 EV_ABS, ABS_MT_TOUCH_MAJOR);
525 if (!(cls->quirks & MT_QUIRK_NO_AREA))
526 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
527 cls->sn_width);
528 mt_store_field(usage, td, hi);
529 return 1;
530 case HID_DG_HEIGHT:
531 hid_map_usage(hi, usage, bit, max,
532 EV_ABS, ABS_MT_TOUCH_MINOR);
533 if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
534 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
535 cls->sn_height);
536 input_set_abs_params(hi->input,
537 ABS_MT_ORIENTATION, 0, 1, 0, 0);
538 }
539 mt_store_field(usage, td, hi);
540 return 1;
541 case HID_DG_TIPPRESSURE:
542 hid_map_usage(hi, usage, bit, max,
543 EV_ABS, ABS_MT_PRESSURE);
544 set_abs(hi->input, ABS_MT_PRESSURE, field,
545 cls->sn_pressure);
546 mt_store_field(usage, td, hi);
547 return 1;
548 case HID_DG_CONTACTCOUNT:
549 /* Ignore if indexes are out of bounds. */
550 if (field->index >= field->report->maxfield ||
551 usage->usage_index >= field->report_count)
552 return 1;
553 td->cc_index = field->index;
554 td->cc_value_index = usage->usage_index;
555 return 1;
556 case HID_DG_CONTACTMAX:
557 /* we don't set td->last_slot_field as contactcount and
558 * contact max are global to the report */
559 return -1;
560 case HID_DG_TOUCH:
561 /* Legacy devices use TIPSWITCH and not TOUCH.
562 * Let's just ignore this field. */
563 return -1;
564 }
565 /* let hid-input decide for the others */
566 return 0;
567
568 case HID_UP_BUTTON:
569 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
570 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
571 input_set_capability(hi->input, EV_KEY, code);
572 return 1;
573
574 case 0xff000000:
575 /* we do not want to map these: no input-oriented meaning */
576 return -1;
577 }
578
579 return 0;
580}
581
582static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
583 struct hid_field *field, struct hid_usage *usage,
584 unsigned long **bit, int *max)
585{
586 if (usage->type == EV_KEY || usage->type == EV_ABS)
587 set_bit(usage->type, hi->input->evbit);
588
589 return -1;
590}
591
592static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
593{
594 __s32 quirks = td->mtclass.quirks;
595
596 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
597 return td->curdata.contactid;
598
599 if (quirks & MT_QUIRK_CYPRESS)
600 return cypress_compute_slot(td);
601
602 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
603 return td->num_received;
604
605 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
606 return td->curdata.contactid - 1;
607
608 return input_mt_get_slot_by_key(input, td->curdata.contactid);
609}
610
611/*
612 * this function is called when a whole contact has been processed,
613 * so that it can assign it to a slot and store the data there
614 */
615static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
616{
617 if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
618 td->num_received >= td->num_expected)
619 return;
620
621 if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
622 int slotnum = mt_compute_slot(td, input);
623 struct mt_slot *s = &td->curdata;
624 struct input_mt *mt = input->mt;
625
626 if (slotnum < 0 || slotnum >= td->maxcontacts)
627 return;
628
629 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
630 struct input_mt_slot *slot = &mt->slots[slotnum];
631 if (input_mt_is_active(slot) &&
632 input_mt_is_used(mt, slot))
633 return;
634 }
635
636 input_mt_slot(input, slotnum);
637 input_mt_report_slot_state(input, MT_TOOL_FINGER,
638 s->touch_state || s->inrange_state);
639 if (s->touch_state || s->inrange_state) {
640 /* this finger is in proximity of the sensor */
641 int wide = (s->w > s->h);
642 /* divided by two to match visual scale of touch */
643 int major = max(s->w, s->h) >> 1;
644 int minor = min(s->w, s->h) >> 1;
645
646 input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
647 input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
648 input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
649 input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
650 input_event(input, EV_ABS, ABS_MT_DISTANCE,
651 !s->touch_state);
652 input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
653 input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
654 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
655 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
656 }
657 }
658
659 td->num_received++;
660}
661
662/*
663 * this function is called when a whole packet has been received and processed,
664 * so that it can decide what to send to the input layer.
665 */
666static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
667{
668 input_mt_sync_frame(input);
669 input_sync(input);
670 td->num_received = 0;
671}
672
673static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
674 struct hid_usage *usage, __s32 value)
675{
676 /* we will handle the hidinput part later, now remains hiddev */
677 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
678 hid->hiddev_hid_event(hid, field, usage, value);
679
680 return 1;
681}
682
683static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
684 struct hid_usage *usage, __s32 value)
685{
686 struct mt_device *td = hid_get_drvdata(hid);
687 __s32 quirks = td->mtclass.quirks;
688 struct input_dev *input = field->hidinput->input;
689
690 if (hid->claimed & HID_CLAIMED_INPUT) {
691 switch (usage->hid) {
692 case HID_DG_INRANGE:
693 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
694 td->curvalid = value;
695 if (quirks & MT_QUIRK_HOVERING)
696 td->curdata.inrange_state = value;
697 break;
698 case HID_DG_TIPSWITCH:
699 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
700 td->curvalid = value;
701 td->curdata.touch_state = value;
702 break;
703 case HID_DG_CONFIDENCE:
704 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
705 td->curvalid = value;
706 break;
707 case HID_DG_CONTACTID:
708 td->curdata.contactid = value;
709 break;
710 case HID_DG_TIPPRESSURE:
711 td->curdata.p = value;
712 break;
713 case HID_GD_X:
714 if (usage->code == ABS_MT_TOOL_X)
715 td->curdata.cx = value;
716 else
717 td->curdata.x = value;
718 break;
719 case HID_GD_Y:
720 if (usage->code == ABS_MT_TOOL_Y)
721 td->curdata.cy = value;
722 else
723 td->curdata.y = value;
724 break;
725 case HID_DG_WIDTH:
726 td->curdata.w = value;
727 break;
728 case HID_DG_HEIGHT:
729 td->curdata.h = value;
730 break;
731 case HID_DG_CONTACTCOUNT:
732 break;
733 case HID_DG_TOUCH:
734 /* do nothing */
735 break;
736
737 default:
738 if (usage->type)
739 input_event(input, usage->type, usage->code,
740 value);
741 return;
742 }
743
744 if (usage->usage_index + 1 == field->report_count) {
745 /* we only take into account the last report. */
746 if (usage->hid == td->last_slot_field)
747 mt_complete_slot(td, field->hidinput->input);
748 }
749
750 }
751}
752
753static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
754{
755 struct mt_device *td = hid_get_drvdata(hid);
756 struct hid_field *field;
757 unsigned count;
758 int r, n;
759
760 /*
761 * Includes multi-packet support where subsequent
762 * packets are sent with zero contactcount.
763 */
764 if (td->cc_index >= 0) {
765 struct hid_field *field = report->field[td->cc_index];
766 int value = field->value[td->cc_value_index];
767 if (value)
768 td->num_expected = value;
769 }
770
771 for (r = 0; r < report->maxfield; r++) {
772 field = report->field[r];
773 count = field->report_count;
774
775 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
776 continue;
777
778 for (n = 0; n < count; n++)
779 mt_process_mt_event(hid, field, &field->usage[n],
780 field->value[n]);
781 }
782
783 if (td->num_received >= td->num_expected)
784 mt_sync_frame(td, report->field[0]->hidinput->input);
785}
786
787static int mt_touch_input_configured(struct hid_device *hdev,
788 struct hid_input *hi)
789{
790 struct mt_device *td = hid_get_drvdata(hdev);
791 struct mt_class *cls = &td->mtclass;
792 struct input_dev *input = hi->input;
793 int ret;
794
795 if (!td->maxcontacts)
796 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
797
798 mt_post_parse(td);
799 if (td->serial_maybe)
800 mt_post_parse_default_settings(td);
801
802 if (cls->is_indirect)
803 td->mt_flags |= INPUT_MT_POINTER;
804
805 if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
806 td->mt_flags |= INPUT_MT_DROP_UNUSED;
807
808 /* check for clickpads */
809 if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
810 td->is_buttonpad = true;
811
812 if (td->is_buttonpad)
813 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
814
815 ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
816 if (ret)
817 return ret;
818
819 td->mt_flags = 0;
820 return 0;
821}
822
823static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
824 struct hid_field *field, struct hid_usage *usage,
825 unsigned long **bit, int *max)
826{
827 struct mt_device *td = hid_get_drvdata(hdev);
828
829 /*
830 * If mtclass.export_all_inputs is not set, only map fields from
831 * TouchScreen or TouchPad collections. We need to ignore fields
832 * that belong to other collections such as Mouse that might have
833 * the same GenericDesktop usages.
834 */
835 if (!td->mtclass.export_all_inputs &&
836 field->application != HID_DG_TOUCHSCREEN &&
837 field->application != HID_DG_PEN &&
838 field->application != HID_DG_TOUCHPAD)
839 return -1;
840
841 /*
842 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
843 * for the stylus.
844 * The check for mt_report_id ensures we don't process
845 * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
846 * collection, but within the report ID.
847 */
848 if (field->physical == HID_DG_STYLUS)
849 return 0;
850 else if ((field->physical == 0) &&
851 (field->report->id != td->mt_report_id) &&
852 (td->mt_report_id != -1))
853 return 0;
854
855 if (field->application == HID_DG_TOUCHSCREEN ||
856 field->application == HID_DG_TOUCHPAD)
857 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
858
859 /* let hid-core decide for the others */
860 return 0;
861}
862
863static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
864 struct hid_field *field, struct hid_usage *usage,
865 unsigned long **bit, int *max)
866{
867 /*
868 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
869 * for the stylus.
870 */
871 if (field->physical == HID_DG_STYLUS)
872 return 0;
873
874 if (field->application == HID_DG_TOUCHSCREEN ||
875 field->application == HID_DG_TOUCHPAD)
876 return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
877
878 /* let hid-core decide for the others */
879 return 0;
880}
881
882static int mt_event(struct hid_device *hid, struct hid_field *field,
883 struct hid_usage *usage, __s32 value)
884{
885 struct mt_device *td = hid_get_drvdata(hid);
886
887 if (field->report->id == td->mt_report_id)
888 return mt_touch_event(hid, field, usage, value);
889
890 return 0;
891}
892
893static void mt_report(struct hid_device *hid, struct hid_report *report)
894{
895 struct mt_device *td = hid_get_drvdata(hid);
896 struct hid_field *field = report->field[0];
897
898 if (!(hid->claimed & HID_CLAIMED_INPUT))
899 return;
900
901 if (report->id == td->mt_report_id)
902 return mt_touch_report(hid, report);
903
904 if (field && field->hidinput && field->hidinput->input)
905 input_sync(field->hidinput->input);
906}
907
908static void mt_set_input_mode(struct hid_device *hdev)
909{
910 struct mt_device *td = hid_get_drvdata(hdev);
911 struct hid_report *r;
912 struct hid_report_enum *re;
913 struct mt_class *cls = &td->mtclass;
914 char *buf;
915 int report_len;
916
917 if (td->inputmode < 0)
918 return;
919
920 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
921 r = re->report_id_hash[td->inputmode];
922 if (r) {
923 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
924 report_len = hid_report_len(r);
925 buf = hid_alloc_report_buf(r, GFP_KERNEL);
926 if (!buf) {
927 hid_err(hdev, "failed to allocate buffer for report\n");
928 return;
929 }
930 hid_hw_raw_request(hdev, r->id, buf, report_len,
931 HID_FEATURE_REPORT,
932 HID_REQ_GET_REPORT);
933 kfree(buf);
934 }
935 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
936 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
937 }
938}
939
940static void mt_set_maxcontacts(struct hid_device *hdev)
941{
942 struct mt_device *td = hid_get_drvdata(hdev);
943 struct hid_report *r;
944 struct hid_report_enum *re;
945 int fieldmax, max;
946
947 if (td->maxcontact_report_id < 0)
948 return;
949
950 if (!td->mtclass.maxcontacts)
951 return;
952
953 re = &hdev->report_enum[HID_FEATURE_REPORT];
954 r = re->report_id_hash[td->maxcontact_report_id];
955 if (r) {
956 max = td->mtclass.maxcontacts;
957 fieldmax = r->field[0]->logical_maximum;
958 max = min(fieldmax, max);
959 if (r->field[0]->value[0] != max) {
960 r->field[0]->value[0] = max;
961 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
962 }
963 }
964}
965
966static void mt_post_parse_default_settings(struct mt_device *td)
967{
968 __s32 quirks = td->mtclass.quirks;
969
970 /* unknown serial device needs special quirks */
971 if (td->touches_by_report == 1) {
972 quirks |= MT_QUIRK_ALWAYS_VALID;
973 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
974 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
975 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
976 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
977 }
978
979 td->mtclass.quirks = quirks;
980}
981
982static void mt_post_parse(struct mt_device *td)
983{
984 struct mt_fields *f = td->fields;
985 struct mt_class *cls = &td->mtclass;
986
987 if (td->touches_by_report > 0) {
988 int field_count_per_touch = f->length / td->touches_by_report;
989 td->last_slot_field = f->usages[field_count_per_touch - 1];
990 }
991
992 if (td->cc_index < 0)
993 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
994}
995
996static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
997{
998 struct mt_device *td = hid_get_drvdata(hdev);
999 char *name;
1000 const char *suffix = NULL;
1001 struct hid_field *field = hi->report->field[0];
1002 int ret;
1003
1004 if (hi->report->id == td->mt_report_id) {
1005 ret = mt_touch_input_configured(hdev, hi);
1006 if (ret)
1007 return ret;
1008 }
1009
1010 /*
1011 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1012 * for the stylus. Check this first, and then rely on the application
1013 * field.
1014 */
1015 if (hi->report->field[0]->physical == HID_DG_STYLUS) {
1016 suffix = "Pen";
1017 /* force BTN_STYLUS to allow tablet matching in udev */
1018 __set_bit(BTN_STYLUS, hi->input->keybit);
1019 } else {
1020 switch (field->application) {
1021 case HID_GD_KEYBOARD:
1022 suffix = "Keyboard";
1023 break;
1024 case HID_GD_KEYPAD:
1025 suffix = "Keypad";
1026 break;
1027 case HID_GD_MOUSE:
1028 suffix = "Mouse";
1029 break;
1030 case HID_DG_STYLUS:
1031 suffix = "Pen";
1032 /* force BTN_STYLUS to allow tablet matching in udev */
1033 __set_bit(BTN_STYLUS, hi->input->keybit);
1034 break;
1035 case HID_DG_TOUCHSCREEN:
1036 /* we do not set suffix = "Touchscreen" */
1037 break;
1038 case HID_DG_TOUCHPAD:
1039 suffix = "Touchpad";
1040 break;
1041 case HID_GD_SYSTEM_CONTROL:
1042 suffix = "System Control";
1043 break;
1044 case HID_CP_CONSUMER_CONTROL:
1045 suffix = "Consumer Control";
1046 break;
1047 default:
1048 suffix = "UNKNOWN";
1049 break;
1050 }
1051 }
1052
1053 if (suffix) {
1054 name = devm_kzalloc(&hi->input->dev,
1055 strlen(hdev->name) + strlen(suffix) + 2,
1056 GFP_KERNEL);
1057 if (name) {
1058 sprintf(name, "%s %s", hdev->name, suffix);
1059 hi->input->name = name;
1060 }
1061 }
1062
1063 return 0;
1064}
1065
1066static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1067{
1068 int ret, i;
1069 struct mt_device *td;
1070 struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1071
1072 for (i = 0; mt_classes[i].name ; i++) {
1073 if (id->driver_data == mt_classes[i].name) {
1074 mtclass = &(mt_classes[i]);
1075 break;
1076 }
1077 }
1078
1079 /* This allows the driver to correctly support devices
1080 * that emit events over several HID messages.
1081 */
1082 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1083
1084 /*
1085 * This allows the driver to handle different input sensors
1086 * that emits events through different reports on the same HID
1087 * device.
1088 */
1089 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1090 hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
1091
1092 /*
1093 * Handle special quirks for Windows 8 certified devices.
1094 */
1095 if (id->group == HID_GROUP_MULTITOUCH_WIN_8)
1096 /*
1097 * Some multitouch screens do not like to be polled for input
1098 * reports. Fortunately, the Win8 spec says that all touches
1099 * should be sent during each report, making the initialization
1100 * of input reports unnecessary.
1101 *
1102 * In addition some touchpads do not behave well if we read
1103 * all feature reports from them. Instead we prevent
1104 * initial report fetching and then selectively fetch each
1105 * report we are interested in.
1106 */
1107 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1108
1109 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1110 if (!td) {
1111 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1112 return -ENOMEM;
1113 }
1114 td->mtclass = *mtclass;
1115 td->inputmode = -1;
1116 td->maxcontact_report_id = -1;
1117 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1118 td->cc_index = -1;
1119 td->mt_report_id = -1;
1120 hid_set_drvdata(hdev, td);
1121
1122 td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
1123 GFP_KERNEL);
1124 if (!td->fields) {
1125 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1126 return -ENOMEM;
1127 }
1128
1129 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1130 td->serial_maybe = true;
1131
1132 ret = hid_parse(hdev);
1133 if (ret != 0)
1134 return ret;
1135
1136 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1137 if (ret)
1138 return ret;
1139
1140 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1141 if (ret)
1142 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1143 hdev->name);
1144
1145 mt_set_maxcontacts(hdev);
1146 mt_set_input_mode(hdev);
1147
1148 /* release .fields memory as it is not used anymore */
1149 devm_kfree(&hdev->dev, td->fields);
1150 td->fields = NULL;
1151
1152 return 0;
1153}
1154
1155#ifdef CONFIG_PM
1156static void mt_release_contacts(struct hid_device *hid)
1157{
1158 struct hid_input *hidinput;
1159
1160 list_for_each_entry(hidinput, &hid->inputs, list) {
1161 struct input_dev *input_dev = hidinput->input;
1162 struct input_mt *mt = input_dev->mt;
1163 int i;
1164
1165 if (mt) {
1166 for (i = 0; i < mt->num_slots; i++) {
1167 input_mt_slot(input_dev, i);
1168 input_mt_report_slot_state(input_dev,
1169 MT_TOOL_FINGER,
1170 false);
1171 }
1172 input_mt_sync_frame(input_dev);
1173 input_sync(input_dev);
1174 }
1175 }
1176}
1177
1178static int mt_reset_resume(struct hid_device *hdev)
1179{
1180 mt_release_contacts(hdev);
1181 mt_set_maxcontacts(hdev);
1182 mt_set_input_mode(hdev);
1183 return 0;
1184}
1185
1186static int mt_resume(struct hid_device *hdev)
1187{
1188 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1189 * It should be safe to send it to other devices too.
1190 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1191
1192 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1193
1194 return 0;
1195}
1196#endif
1197
1198static void mt_remove(struct hid_device *hdev)
1199{
1200 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1201 hid_hw_stop(hdev);
1202}
1203
1204/*
1205 * This list contains only:
1206 * - VID/PID of products not working with the default multitouch handling
1207 * - 2 generic rules.
1208 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1209 */
1210static const struct hid_device_id mt_devices[] = {
1211
1212 /* 3M panels */
1213 { .driver_data = MT_CLS_3M,
1214 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1215 USB_DEVICE_ID_3M1968) },
1216 { .driver_data = MT_CLS_3M,
1217 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1218 USB_DEVICE_ID_3M2256) },
1219 { .driver_data = MT_CLS_3M,
1220 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1221 USB_DEVICE_ID_3M3266) },
1222
1223 /* Anton devices */
1224 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1225 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1226 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1227
1228 /* Atmel panels */
1229 { .driver_data = MT_CLS_SERIAL,
1230 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1231 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1232
1233 /* Baanto multitouch devices */
1234 { .driver_data = MT_CLS_NSMU,
1235 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1236 USB_DEVICE_ID_BAANTO_MT_190W2) },
1237
1238 /* Cando panels */
1239 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1240 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1241 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1242 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1243 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1244 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1245
1246 /* Chunghwa Telecom touch panels */
1247 { .driver_data = MT_CLS_NSMU,
1248 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1249 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1250
1251 /* CJTouch panels */
1252 { .driver_data = MT_CLS_NSMU,
1253 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1254 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1255 { .driver_data = MT_CLS_NSMU,
1256 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1257 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1258
1259 /* CVTouch panels */
1260 { .driver_data = MT_CLS_NSMU,
1261 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1262 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1263
1264 /* eGalax devices (resistive) */
1265 { .driver_data = MT_CLS_EGALAX,
1266 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1267 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1268 { .driver_data = MT_CLS_EGALAX,
1269 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1270 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1271
1272 /* eGalax devices (capacitive) */
1273 { .driver_data = MT_CLS_EGALAX_SERIAL,
1274 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1275 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1276 { .driver_data = MT_CLS_EGALAX,
1277 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1278 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1279 { .driver_data = MT_CLS_EGALAX_SERIAL,
1280 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1281 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1282 { .driver_data = MT_CLS_EGALAX_SERIAL,
1283 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1284 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1285 { .driver_data = MT_CLS_EGALAX_SERIAL,
1286 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1287 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1288 { .driver_data = MT_CLS_EGALAX_SERIAL,
1289 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1290 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1291 { .driver_data = MT_CLS_EGALAX,
1292 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1293 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1294 { .driver_data = MT_CLS_EGALAX,
1295 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1296 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1297 { .driver_data = MT_CLS_EGALAX_SERIAL,
1298 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1299 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1300 { .driver_data = MT_CLS_EGALAX,
1301 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1302 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1303 { .driver_data = MT_CLS_EGALAX,
1304 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1305 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1306 { .driver_data = MT_CLS_EGALAX,
1307 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1308 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1309 { .driver_data = MT_CLS_EGALAX,
1310 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1311 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1312 { .driver_data = MT_CLS_EGALAX_SERIAL,
1313 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1314 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1315 { .driver_data = MT_CLS_EGALAX_SERIAL,
1316 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1317 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1318 { .driver_data = MT_CLS_EGALAX_SERIAL,
1319 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1320 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1321
1322 /* Elitegroup panel */
1323 { .driver_data = MT_CLS_SERIAL,
1324 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1325 USB_DEVICE_ID_ELITEGROUP_05D8) },
1326
1327 /* Flatfrog Panels */
1328 { .driver_data = MT_CLS_FLATFROG,
1329 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1330 USB_DEVICE_ID_MULTITOUCH_3200) },
1331
1332 /* FocalTech Panels */
1333 { .driver_data = MT_CLS_SERIAL,
1334 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1335 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1336
1337 /* GeneralTouch panel */
1338 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1339 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1340 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1341 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1342 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1343 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1344 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1345 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1346 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1347 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1348 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1349 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1350 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1351 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1352 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1353 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1354 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1355 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1356 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1357 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1358 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1359
1360 /* Gametel game controller */
1361 { .driver_data = MT_CLS_NSMU,
1362 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1363 USB_DEVICE_ID_GAMETEL_MT_MODE) },
1364
1365 /* GoodTouch panels */
1366 { .driver_data = MT_CLS_NSMU,
1367 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1368 USB_DEVICE_ID_GOODTOUCH_000f) },
1369
1370 /* Hanvon panels */
1371 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1372 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1373 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1374
1375 /* Ilitek dual touch panel */
1376 { .driver_data = MT_CLS_NSMU,
1377 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1378 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1379
1380 /* MosArt panels */
1381 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1382 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1383 USB_DEVICE_ID_ASUS_T91MT)},
1384 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1385 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1386 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1387 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1388 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1389 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1390
1391 /* Panasonic panels */
1392 { .driver_data = MT_CLS_PANASONIC,
1393 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1394 USB_DEVICE_ID_PANABOARD_UBT780) },
1395 { .driver_data = MT_CLS_PANASONIC,
1396 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1397 USB_DEVICE_ID_PANABOARD_UBT880) },
1398
1399 /* Novatek Panel */
1400 { .driver_data = MT_CLS_NSMU,
1401 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1402 USB_DEVICE_ID_NOVATEK_PCT) },
1403
1404 /* PixArt optical touch screen */
1405 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1406 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1407 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1408 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1409 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1410 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1411 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1412 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1413 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1414
1415 /* PixCir-based panels */
1416 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1417 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1418 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1419
1420 /* Quanta-based panels */
1421 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1422 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1423 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1424
1425 /* Stantum panels */
1426 { .driver_data = MT_CLS_CONFIDENCE,
1427 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1428 USB_DEVICE_ID_MTP_STM)},
1429
1430 /* TopSeed panels */
1431 { .driver_data = MT_CLS_TOPSEED,
1432 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1433 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1434
1435 /* Touch International panels */
1436 { .driver_data = MT_CLS_NSMU,
1437 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1438 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1439
1440 /* Unitec panels */
1441 { .driver_data = MT_CLS_NSMU,
1442 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1443 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1444 { .driver_data = MT_CLS_NSMU,
1445 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1446 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1447
1448 /* VTL panels */
1449 { .driver_data = MT_CLS_VTL,
1450 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
1451 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
1452
1453 /* Wistron panels */
1454 { .driver_data = MT_CLS_NSMU,
1455 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1456 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1457
1458 /* XAT */
1459 { .driver_data = MT_CLS_NSMU,
1460 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1461 USB_DEVICE_ID_XAT_CSR) },
1462
1463 /* Xiroku */
1464 { .driver_data = MT_CLS_NSMU,
1465 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1466 USB_DEVICE_ID_XIROKU_SPX) },
1467 { .driver_data = MT_CLS_NSMU,
1468 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1469 USB_DEVICE_ID_XIROKU_MPX) },
1470 { .driver_data = MT_CLS_NSMU,
1471 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1472 USB_DEVICE_ID_XIROKU_CSR) },
1473 { .driver_data = MT_CLS_NSMU,
1474 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1475 USB_DEVICE_ID_XIROKU_SPX1) },
1476 { .driver_data = MT_CLS_NSMU,
1477 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1478 USB_DEVICE_ID_XIROKU_MPX1) },
1479 { .driver_data = MT_CLS_NSMU,
1480 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1481 USB_DEVICE_ID_XIROKU_CSR1) },
1482 { .driver_data = MT_CLS_NSMU,
1483 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1484 USB_DEVICE_ID_XIROKU_SPX2) },
1485 { .driver_data = MT_CLS_NSMU,
1486 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1487 USB_DEVICE_ID_XIROKU_MPX2) },
1488 { .driver_data = MT_CLS_NSMU,
1489 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1490 USB_DEVICE_ID_XIROKU_CSR2) },
1491
1492 /* Generic MT device */
1493 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1494
1495 /* Generic Win 8 certified MT device */
1496 { .driver_data = MT_CLS_WIN_8,
1497 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1498 HID_ANY_ID, HID_ANY_ID) },
1499 { }
1500};
1501MODULE_DEVICE_TABLE(hid, mt_devices);
1502
1503static const struct hid_usage_id mt_grabbed_usages[] = {
1504 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1505 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1506};
1507
1508static struct hid_driver mt_driver = {
1509 .name = "hid-multitouch",
1510 .id_table = mt_devices,
1511 .probe = mt_probe,
1512 .remove = mt_remove,
1513 .input_mapping = mt_input_mapping,
1514 .input_mapped = mt_input_mapped,
1515 .input_configured = mt_input_configured,
1516 .feature_mapping = mt_feature_mapping,
1517 .usage_table = mt_grabbed_usages,
1518 .event = mt_event,
1519 .report = mt_report,
1520#ifdef CONFIG_PM
1521 .reset_resume = mt_reset_resume,
1522 .resume = mt_resume,
1523#endif
1524};
1525module_hid_driver(mt_driver);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * HID driver for multitouch panels
4 *
5 * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
6 * Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
7 * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
8 * Copyright (c) 2012-2013 Red Hat, Inc
9 *
10 * This code is partly based on hid-egalax.c:
11 *
12 * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
13 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
14 * Copyright (c) 2010 Canonical, Ltd.
15 *
16 * This code is partly based on hid-3m-pct.c:
17 *
18 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
19 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
20 * Copyright (c) 2010 Canonical, Ltd.
21 */
22
23/*
24 */
25
26/*
27 * This driver is regularly tested thanks to the test suite in hid-tools[1].
28 * Please run these regression tests before patching this module so that
29 * your patch won't break existing known devices.
30 *
31 * [1] https://gitlab.freedesktop.org/libevdev/hid-tools
32 */
33
34#include <linux/device.h>
35#include <linux/hid.h>
36#include <linux/module.h>
37#include <linux/slab.h>
38#include <linux/input/mt.h>
39#include <linux/jiffies.h>
40#include <linux/string.h>
41#include <linux/timer.h>
42
43
44MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
45MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
46MODULE_DESCRIPTION("HID multitouch panels");
47MODULE_LICENSE("GPL");
48
49#include "hid-ids.h"
50
51/* quirks to control the device */
52#define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0)
53#define MT_QUIRK_SLOT_IS_CONTACTID BIT(1)
54#define MT_QUIRK_CYPRESS BIT(2)
55#define MT_QUIRK_SLOT_IS_CONTACTNUMBER BIT(3)
56#define MT_QUIRK_ALWAYS_VALID BIT(4)
57#define MT_QUIRK_VALID_IS_INRANGE BIT(5)
58#define MT_QUIRK_VALID_IS_CONFIDENCE BIT(6)
59#define MT_QUIRK_CONFIDENCE BIT(7)
60#define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE BIT(8)
61#define MT_QUIRK_NO_AREA BIT(9)
62#define MT_QUIRK_IGNORE_DUPLICATES BIT(10)
63#define MT_QUIRK_HOVERING BIT(11)
64#define MT_QUIRK_CONTACT_CNT_ACCURATE BIT(12)
65#define MT_QUIRK_FORCE_GET_FEATURE BIT(13)
66#define MT_QUIRK_FIX_CONST_CONTACT_ID BIT(14)
67#define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15)
68#define MT_QUIRK_STICKY_FINGERS BIT(16)
69#define MT_QUIRK_ASUS_CUSTOM_UP BIT(17)
70#define MT_QUIRK_WIN8_PTP_BUTTONS BIT(18)
71#define MT_QUIRK_SEPARATE_APP_REPORT BIT(19)
72#define MT_QUIRK_FORCE_MULTI_INPUT BIT(20)
73#define MT_QUIRK_DISABLE_WAKEUP BIT(21)
74#define MT_QUIRK_ORIENTATION_INVERT BIT(22)
75
76#define MT_INPUTMODE_TOUCHSCREEN 0x02
77#define MT_INPUTMODE_TOUCHPAD 0x03
78
79#define MT_BUTTONTYPE_CLICKPAD 0
80
81enum latency_mode {
82 HID_LATENCY_NORMAL = 0,
83 HID_LATENCY_HIGH = 1,
84};
85
86#define MT_IO_FLAGS_RUNNING 0
87#define MT_IO_FLAGS_ACTIVE_SLOTS 1
88#define MT_IO_FLAGS_PENDING_SLOTS 2
89
90static const bool mtrue = true; /* default for true */
91static const bool mfalse; /* default for false */
92static const __s32 mzero; /* default for 0 */
93
94#define DEFAULT_TRUE ((void *)&mtrue)
95#define DEFAULT_FALSE ((void *)&mfalse)
96#define DEFAULT_ZERO ((void *)&mzero)
97
98struct mt_usages {
99 struct list_head list;
100 __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
101 __s32 *contactid; /* the device ContactID assigned to this slot */
102 bool *tip_state; /* is the touch valid? */
103 bool *inrange_state; /* is the finger in proximity of the sensor? */
104 bool *confidence_state; /* is the touch made by a finger? */
105};
106
107struct mt_application {
108 struct list_head list;
109 unsigned int application;
110 unsigned int report_id;
111 struct list_head mt_usages; /* mt usages list */
112
113 __s32 quirks;
114
115 __s32 *scantime; /* scantime reported */
116 __s32 scantime_logical_max; /* max value for raw scantime */
117
118 __s32 *raw_cc; /* contact count in the report */
119 int left_button_state; /* left button state */
120 unsigned int mt_flags; /* flags to pass to input-mt */
121
122 unsigned long *pending_palm_slots; /* slots where we reported palm
123 * and need to release */
124
125 __u8 num_received; /* how many contacts we received */
126 __u8 num_expected; /* expected last contact index */
127 __u8 buttons_count; /* number of physical buttons per touchpad */
128 __u8 touches_by_report; /* how many touches are present in one report:
129 * 1 means we should use a serial protocol
130 * > 1 means hybrid (multitouch) protocol
131 */
132
133 __s32 dev_time; /* the scan time provided by the device */
134 unsigned long jiffies; /* the frame's jiffies */
135 int timestamp; /* the timestamp to be sent */
136 int prev_scantime; /* scantime reported previously */
137
138 bool have_contact_count;
139};
140
141struct mt_class {
142 __s32 name; /* MT_CLS */
143 __s32 quirks;
144 __s32 sn_move; /* Signal/noise ratio for move events */
145 __s32 sn_width; /* Signal/noise ratio for width events */
146 __s32 sn_height; /* Signal/noise ratio for height events */
147 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
148 __u8 maxcontacts;
149 bool is_indirect; /* true for touchpads */
150 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
151};
152
153struct mt_report_data {
154 struct list_head list;
155 struct hid_report *report;
156 struct mt_application *application;
157 bool is_mt_collection;
158};
159
160struct mt_device {
161 struct mt_class mtclass; /* our mt device class */
162 struct timer_list release_timer; /* to release sticky fingers */
163 struct hid_device *hdev; /* hid_device we're attached to */
164 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
165 __u8 inputmode_value; /* InputMode HID feature value */
166 __u8 maxcontacts;
167 bool is_buttonpad; /* is this device a button pad? */
168 bool serial_maybe; /* need to check for serial protocol */
169
170 struct list_head applications;
171 struct list_head reports;
172};
173
174static void mt_post_parse_default_settings(struct mt_device *td,
175 struct mt_application *app);
176static void mt_post_parse(struct mt_device *td, struct mt_application *app);
177
178/* classes of device behavior */
179#define MT_CLS_DEFAULT 0x0001
180
181#define MT_CLS_SERIAL 0x0002
182#define MT_CLS_CONFIDENCE 0x0003
183#define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
184#define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
185#define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
186#define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
187/* reserved 0x0008 */
188#define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
189#define MT_CLS_NSMU 0x000a
190/* reserved 0x0010 */
191/* reserved 0x0011 */
192#define MT_CLS_WIN_8 0x0012
193#define MT_CLS_EXPORT_ALL_INPUTS 0x0013
194/* reserved 0x0014 */
195#define MT_CLS_WIN_8_FORCE_MULTI_INPUT 0x0015
196#define MT_CLS_WIN_8_DISABLE_WAKEUP 0x0016
197#define MT_CLS_WIN_8_NO_STICKY_FINGERS 0x0017
198#define MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU 0x0018
199
200/* vendor specific classes */
201#define MT_CLS_3M 0x0101
202/* reserved 0x0102 */
203#define MT_CLS_EGALAX 0x0103
204#define MT_CLS_EGALAX_SERIAL 0x0104
205#define MT_CLS_TOPSEED 0x0105
206#define MT_CLS_PANASONIC 0x0106
207#define MT_CLS_FLATFROG 0x0107
208#define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
209#define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
210#define MT_CLS_LG 0x010a
211#define MT_CLS_ASUS 0x010b
212#define MT_CLS_VTL 0x0110
213#define MT_CLS_GOOGLE 0x0111
214#define MT_CLS_RAZER_BLADE_STEALTH 0x0112
215#define MT_CLS_SMART_TECH 0x0113
216
217#define MT_DEFAULT_MAXCONTACT 10
218#define MT_MAX_MAXCONTACT 250
219
220/*
221 * Resync device and local timestamps after that many microseconds without
222 * receiving data.
223 */
224#define MAX_TIMESTAMP_INTERVAL 1000000
225
226#define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
227#define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
228
229/*
230 * these device-dependent functions determine what slot corresponds
231 * to a valid contact that was just read.
232 */
233
234static int cypress_compute_slot(struct mt_application *application,
235 struct mt_usages *slot)
236{
237 if (*slot->contactid != 0 || application->num_received == 0)
238 return *slot->contactid;
239 else
240 return -1;
241}
242
243static const struct mt_class mt_classes[] = {
244 { .name = MT_CLS_DEFAULT,
245 .quirks = MT_QUIRK_ALWAYS_VALID |
246 MT_QUIRK_CONTACT_CNT_ACCURATE },
247 { .name = MT_CLS_NSMU,
248 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
249 { .name = MT_CLS_SERIAL,
250 .quirks = MT_QUIRK_ALWAYS_VALID},
251 { .name = MT_CLS_CONFIDENCE,
252 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
253 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
254 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
255 MT_QUIRK_SLOT_IS_CONTACTID },
256 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
257 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
258 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
259 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
260 .quirks = MT_QUIRK_VALID_IS_INRANGE |
261 MT_QUIRK_SLOT_IS_CONTACTID,
262 .maxcontacts = 2 },
263 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
264 .quirks = MT_QUIRK_VALID_IS_INRANGE |
265 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
266 .maxcontacts = 2 },
267 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
268 .quirks = MT_QUIRK_VALID_IS_INRANGE |
269 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
270 { .name = MT_CLS_WIN_8,
271 .quirks = MT_QUIRK_ALWAYS_VALID |
272 MT_QUIRK_IGNORE_DUPLICATES |
273 MT_QUIRK_HOVERING |
274 MT_QUIRK_CONTACT_CNT_ACCURATE |
275 MT_QUIRK_STICKY_FINGERS |
276 MT_QUIRK_WIN8_PTP_BUTTONS,
277 .export_all_inputs = true },
278 { .name = MT_CLS_EXPORT_ALL_INPUTS,
279 .quirks = MT_QUIRK_ALWAYS_VALID |
280 MT_QUIRK_CONTACT_CNT_ACCURATE,
281 .export_all_inputs = true },
282 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
283 .quirks = MT_QUIRK_ALWAYS_VALID |
284 MT_QUIRK_IGNORE_DUPLICATES |
285 MT_QUIRK_HOVERING |
286 MT_QUIRK_CONTACT_CNT_ACCURATE |
287 MT_QUIRK_STICKY_FINGERS |
288 MT_QUIRK_WIN8_PTP_BUTTONS |
289 MT_QUIRK_FORCE_MULTI_INPUT,
290 .export_all_inputs = true },
291 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
292 .quirks = MT_QUIRK_IGNORE_DUPLICATES |
293 MT_QUIRK_HOVERING |
294 MT_QUIRK_CONTACT_CNT_ACCURATE |
295 MT_QUIRK_STICKY_FINGERS |
296 MT_QUIRK_WIN8_PTP_BUTTONS |
297 MT_QUIRK_FORCE_MULTI_INPUT |
298 MT_QUIRK_NOT_SEEN_MEANS_UP,
299 .export_all_inputs = true },
300 { .name = MT_CLS_WIN_8_DISABLE_WAKEUP,
301 .quirks = MT_QUIRK_ALWAYS_VALID |
302 MT_QUIRK_IGNORE_DUPLICATES |
303 MT_QUIRK_HOVERING |
304 MT_QUIRK_CONTACT_CNT_ACCURATE |
305 MT_QUIRK_STICKY_FINGERS |
306 MT_QUIRK_WIN8_PTP_BUTTONS |
307 MT_QUIRK_DISABLE_WAKEUP,
308 .export_all_inputs = true },
309 { .name = MT_CLS_WIN_8_NO_STICKY_FINGERS,
310 .quirks = MT_QUIRK_ALWAYS_VALID |
311 MT_QUIRK_IGNORE_DUPLICATES |
312 MT_QUIRK_HOVERING |
313 MT_QUIRK_CONTACT_CNT_ACCURATE |
314 MT_QUIRK_WIN8_PTP_BUTTONS,
315 .export_all_inputs = true },
316
317 /*
318 * vendor specific classes
319 */
320 { .name = MT_CLS_3M,
321 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
322 MT_QUIRK_SLOT_IS_CONTACTID |
323 MT_QUIRK_TOUCH_SIZE_SCALING,
324 .sn_move = 2048,
325 .sn_width = 128,
326 .sn_height = 128,
327 .maxcontacts = 60,
328 },
329 { .name = MT_CLS_EGALAX,
330 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
331 MT_QUIRK_VALID_IS_INRANGE,
332 .sn_move = 4096,
333 .sn_pressure = 32,
334 },
335 { .name = MT_CLS_EGALAX_SERIAL,
336 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
337 MT_QUIRK_ALWAYS_VALID,
338 .sn_move = 4096,
339 .sn_pressure = 32,
340 },
341 { .name = MT_CLS_TOPSEED,
342 .quirks = MT_QUIRK_ALWAYS_VALID,
343 .is_indirect = true,
344 .maxcontacts = 2,
345 },
346 { .name = MT_CLS_PANASONIC,
347 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
348 .maxcontacts = 4 },
349 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
350 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
351 MT_QUIRK_VALID_IS_INRANGE |
352 MT_QUIRK_SLOT_IS_CONTACTID,
353 .maxcontacts = 2
354 },
355 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
356 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
357 MT_QUIRK_SLOT_IS_CONTACTID
358 },
359
360 { .name = MT_CLS_FLATFROG,
361 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
362 MT_QUIRK_NO_AREA,
363 .sn_move = 2048,
364 .maxcontacts = 40,
365 },
366 { .name = MT_CLS_LG,
367 .quirks = MT_QUIRK_ALWAYS_VALID |
368 MT_QUIRK_FIX_CONST_CONTACT_ID |
369 MT_QUIRK_IGNORE_DUPLICATES |
370 MT_QUIRK_HOVERING |
371 MT_QUIRK_CONTACT_CNT_ACCURATE },
372 { .name = MT_CLS_ASUS,
373 .quirks = MT_QUIRK_ALWAYS_VALID |
374 MT_QUIRK_CONTACT_CNT_ACCURATE |
375 MT_QUIRK_ASUS_CUSTOM_UP },
376 { .name = MT_CLS_VTL,
377 .quirks = MT_QUIRK_ALWAYS_VALID |
378 MT_QUIRK_CONTACT_CNT_ACCURATE |
379 MT_QUIRK_FORCE_GET_FEATURE,
380 },
381 { .name = MT_CLS_GOOGLE,
382 .quirks = MT_QUIRK_ALWAYS_VALID |
383 MT_QUIRK_CONTACT_CNT_ACCURATE |
384 MT_QUIRK_SLOT_IS_CONTACTID |
385 MT_QUIRK_HOVERING
386 },
387 { .name = MT_CLS_RAZER_BLADE_STEALTH,
388 .quirks = MT_QUIRK_ALWAYS_VALID |
389 MT_QUIRK_IGNORE_DUPLICATES |
390 MT_QUIRK_HOVERING |
391 MT_QUIRK_CONTACT_CNT_ACCURATE |
392 MT_QUIRK_WIN8_PTP_BUTTONS,
393 },
394 { .name = MT_CLS_SMART_TECH,
395 .quirks = MT_QUIRK_ALWAYS_VALID |
396 MT_QUIRK_IGNORE_DUPLICATES |
397 MT_QUIRK_CONTACT_CNT_ACCURATE |
398 MT_QUIRK_SEPARATE_APP_REPORT,
399 },
400 { }
401};
402
403static ssize_t mt_show_quirks(struct device *dev,
404 struct device_attribute *attr,
405 char *buf)
406{
407 struct hid_device *hdev = to_hid_device(dev);
408 struct mt_device *td = hid_get_drvdata(hdev);
409
410 return sprintf(buf, "%u\n", td->mtclass.quirks);
411}
412
413static ssize_t mt_set_quirks(struct device *dev,
414 struct device_attribute *attr,
415 const char *buf, size_t count)
416{
417 struct hid_device *hdev = to_hid_device(dev);
418 struct mt_device *td = hid_get_drvdata(hdev);
419 struct mt_application *application;
420
421 unsigned long val;
422
423 if (kstrtoul(buf, 0, &val))
424 return -EINVAL;
425
426 td->mtclass.quirks = val;
427
428 list_for_each_entry(application, &td->applications, list) {
429 application->quirks = val;
430 if (!application->have_contact_count)
431 application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
432 }
433
434 return count;
435}
436
437static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
438
439static struct attribute *sysfs_attrs[] = {
440 &dev_attr_quirks.attr,
441 NULL
442};
443
444static const struct attribute_group mt_attribute_group = {
445 .attrs = sysfs_attrs
446};
447
448static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
449{
450 int ret;
451 u32 size = hid_report_len(report);
452 u8 *buf;
453
454 /*
455 * Do not fetch the feature report if the device has been explicitly
456 * marked as non-capable.
457 */
458 if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
459 return;
460
461 buf = hid_alloc_report_buf(report, GFP_KERNEL);
462 if (!buf)
463 return;
464
465 ret = hid_hw_raw_request(hdev, report->id, buf, size,
466 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
467 if (ret < 0) {
468 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
469 report->id);
470 } else {
471 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
472 size, 0);
473 if (ret)
474 dev_warn(&hdev->dev, "failed to report feature\n");
475 }
476
477 kfree(buf);
478}
479
480static void mt_feature_mapping(struct hid_device *hdev,
481 struct hid_field *field, struct hid_usage *usage)
482{
483 struct mt_device *td = hid_get_drvdata(hdev);
484
485 switch (usage->hid) {
486 case HID_DG_CONTACTMAX:
487 mt_get_feature(hdev, field->report);
488
489 td->maxcontacts = field->value[0];
490 if (!td->maxcontacts &&
491 field->logical_maximum <= MT_MAX_MAXCONTACT)
492 td->maxcontacts = field->logical_maximum;
493 if (td->mtclass.maxcontacts)
494 /* check if the maxcontacts is given by the class */
495 td->maxcontacts = td->mtclass.maxcontacts;
496
497 break;
498 case HID_DG_BUTTONTYPE:
499 if (usage->usage_index >= field->report_count) {
500 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
501 break;
502 }
503
504 mt_get_feature(hdev, field->report);
505 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
506 td->is_buttonpad = true;
507
508 break;
509 case 0xff0000c5:
510 /* Retrieve the Win8 blob once to enable some devices */
511 if (usage->usage_index == 0)
512 mt_get_feature(hdev, field->report);
513 break;
514 }
515}
516
517static void set_abs(struct input_dev *input, unsigned int code,
518 struct hid_field *field, int snratio)
519{
520 int fmin = field->logical_minimum;
521 int fmax = field->logical_maximum;
522 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
523 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
524 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
525}
526
527static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
528 struct mt_application *application)
529{
530 struct mt_usages *usage;
531
532 usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
533 if (!usage)
534 return NULL;
535
536 /* set some defaults so we do not need to check for null pointers */
537 usage->x = DEFAULT_ZERO;
538 usage->y = DEFAULT_ZERO;
539 usage->cx = DEFAULT_ZERO;
540 usage->cy = DEFAULT_ZERO;
541 usage->p = DEFAULT_ZERO;
542 usage->w = DEFAULT_ZERO;
543 usage->h = DEFAULT_ZERO;
544 usage->a = DEFAULT_ZERO;
545 usage->contactid = DEFAULT_ZERO;
546 usage->tip_state = DEFAULT_FALSE;
547 usage->inrange_state = DEFAULT_FALSE;
548 usage->confidence_state = DEFAULT_TRUE;
549
550 list_add_tail(&usage->list, &application->mt_usages);
551
552 return usage;
553}
554
555static struct mt_application *mt_allocate_application(struct mt_device *td,
556 struct hid_report *report)
557{
558 unsigned int application = report->application;
559 struct mt_application *mt_application;
560
561 mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
562 GFP_KERNEL);
563 if (!mt_application)
564 return NULL;
565
566 mt_application->application = application;
567 INIT_LIST_HEAD(&mt_application->mt_usages);
568
569 if (application == HID_DG_TOUCHSCREEN)
570 mt_application->mt_flags |= INPUT_MT_DIRECT;
571
572 /*
573 * Model touchscreens providing buttons as touchpads.
574 */
575 if (application == HID_DG_TOUCHPAD) {
576 mt_application->mt_flags |= INPUT_MT_POINTER;
577 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
578 }
579
580 mt_application->scantime = DEFAULT_ZERO;
581 mt_application->raw_cc = DEFAULT_ZERO;
582 mt_application->quirks = td->mtclass.quirks;
583 mt_application->report_id = report->id;
584
585 list_add_tail(&mt_application->list, &td->applications);
586
587 return mt_application;
588}
589
590static struct mt_application *mt_find_application(struct mt_device *td,
591 struct hid_report *report)
592{
593 unsigned int application = report->application;
594 struct mt_application *tmp, *mt_application = NULL;
595
596 list_for_each_entry(tmp, &td->applications, list) {
597 if (application == tmp->application) {
598 if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
599 tmp->report_id == report->id) {
600 mt_application = tmp;
601 break;
602 }
603 }
604 }
605
606 if (!mt_application)
607 mt_application = mt_allocate_application(td, report);
608
609 return mt_application;
610}
611
612static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
613 struct hid_report *report)
614{
615 struct mt_report_data *rdata;
616 struct hid_field *field;
617 int r, n;
618
619 rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
620 if (!rdata)
621 return NULL;
622
623 rdata->report = report;
624 rdata->application = mt_find_application(td, report);
625
626 if (!rdata->application) {
627 devm_kfree(&td->hdev->dev, rdata);
628 return NULL;
629 }
630
631 for (r = 0; r < report->maxfield; r++) {
632 field = report->field[r];
633
634 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
635 continue;
636
637 if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) {
638 for (n = 0; n < field->report_count; n++) {
639 if (field->usage[n].hid == HID_DG_CONTACTID) {
640 rdata->is_mt_collection = true;
641 break;
642 }
643 }
644 }
645 }
646
647 list_add_tail(&rdata->list, &td->reports);
648
649 return rdata;
650}
651
652static struct mt_report_data *mt_find_report_data(struct mt_device *td,
653 struct hid_report *report)
654{
655 struct mt_report_data *tmp, *rdata = NULL;
656
657 list_for_each_entry(tmp, &td->reports, list) {
658 if (report == tmp->report) {
659 rdata = tmp;
660 break;
661 }
662 }
663
664 if (!rdata)
665 rdata = mt_allocate_report_data(td, report);
666
667 return rdata;
668}
669
670static void mt_store_field(struct hid_device *hdev,
671 struct mt_application *application,
672 __s32 *value,
673 size_t offset)
674{
675 struct mt_usages *usage;
676 __s32 **target;
677
678 if (list_empty(&application->mt_usages))
679 usage = mt_allocate_usage(hdev, application);
680 else
681 usage = list_last_entry(&application->mt_usages,
682 struct mt_usages,
683 list);
684
685 if (!usage)
686 return;
687
688 target = (__s32 **)((char *)usage + offset);
689
690 /* the value has already been filled, create a new slot */
691 if (*target != DEFAULT_TRUE &&
692 *target != DEFAULT_FALSE &&
693 *target != DEFAULT_ZERO) {
694 if (usage->contactid == DEFAULT_ZERO ||
695 usage->x == DEFAULT_ZERO ||
696 usage->y == DEFAULT_ZERO) {
697 hid_dbg(hdev,
698 "ignoring duplicate usage on incomplete");
699 return;
700 }
701 usage = mt_allocate_usage(hdev, application);
702 if (!usage)
703 return;
704
705 target = (__s32 **)((char *)usage + offset);
706 }
707
708 *target = value;
709}
710
711#define MT_STORE_FIELD(__name) \
712 mt_store_field(hdev, app, \
713 &field->value[usage->usage_index], \
714 offsetof(struct mt_usages, __name))
715
716static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
717 struct hid_field *field, struct hid_usage *usage,
718 unsigned long **bit, int *max, struct mt_application *app)
719{
720 struct mt_device *td = hid_get_drvdata(hdev);
721 struct mt_class *cls = &td->mtclass;
722 int code;
723 struct hid_usage *prev_usage = NULL;
724
725 /*
726 * Model touchscreens providing buttons as touchpads.
727 */
728 if (field->application == HID_DG_TOUCHSCREEN &&
729 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
730 app->mt_flags |= INPUT_MT_POINTER;
731 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
732 }
733
734 /* count the buttons on touchpads */
735 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
736 app->buttons_count++;
737
738 if (usage->usage_index)
739 prev_usage = &field->usage[usage->usage_index - 1];
740
741 switch (usage->hid & HID_USAGE_PAGE) {
742
743 case HID_UP_GENDESK:
744 switch (usage->hid) {
745 case HID_GD_X:
746 if (prev_usage && (prev_usage->hid == usage->hid)) {
747 code = ABS_MT_TOOL_X;
748 MT_STORE_FIELD(cx);
749 } else {
750 code = ABS_MT_POSITION_X;
751 MT_STORE_FIELD(x);
752 }
753
754 set_abs(hi->input, code, field, cls->sn_move);
755
756 /*
757 * A system multi-axis that exports X and Y has a high
758 * chance of being used directly on a surface
759 */
760 if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
761 __set_bit(INPUT_PROP_DIRECT,
762 hi->input->propbit);
763 input_set_abs_params(hi->input,
764 ABS_MT_TOOL_TYPE,
765 MT_TOOL_DIAL,
766 MT_TOOL_DIAL, 0, 0);
767 }
768
769 return 1;
770 case HID_GD_Y:
771 if (prev_usage && (prev_usage->hid == usage->hid)) {
772 code = ABS_MT_TOOL_Y;
773 MT_STORE_FIELD(cy);
774 } else {
775 code = ABS_MT_POSITION_Y;
776 MT_STORE_FIELD(y);
777 }
778
779 set_abs(hi->input, code, field, cls->sn_move);
780
781 return 1;
782 }
783 return 0;
784
785 case HID_UP_DIGITIZER:
786 switch (usage->hid) {
787 case HID_DG_INRANGE:
788 if (app->quirks & MT_QUIRK_HOVERING) {
789 input_set_abs_params(hi->input,
790 ABS_MT_DISTANCE, 0, 1, 0, 0);
791 }
792 MT_STORE_FIELD(inrange_state);
793 return 1;
794 case HID_DG_CONFIDENCE:
795 if ((cls->name == MT_CLS_WIN_8 ||
796 cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT ||
797 cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU ||
798 cls->name == MT_CLS_WIN_8_DISABLE_WAKEUP) &&
799 (field->application == HID_DG_TOUCHPAD ||
800 field->application == HID_DG_TOUCHSCREEN))
801 app->quirks |= MT_QUIRK_CONFIDENCE;
802
803 if (app->quirks & MT_QUIRK_CONFIDENCE)
804 input_set_abs_params(hi->input,
805 ABS_MT_TOOL_TYPE,
806 MT_TOOL_FINGER,
807 MT_TOOL_PALM, 0, 0);
808
809 MT_STORE_FIELD(confidence_state);
810 return 1;
811 case HID_DG_TIPSWITCH:
812 if (field->application != HID_GD_SYSTEM_MULTIAXIS)
813 input_set_capability(hi->input,
814 EV_KEY, BTN_TOUCH);
815 MT_STORE_FIELD(tip_state);
816 return 1;
817 case HID_DG_CONTACTID:
818 MT_STORE_FIELD(contactid);
819 app->touches_by_report++;
820 return 1;
821 case HID_DG_WIDTH:
822 if (!(app->quirks & MT_QUIRK_NO_AREA))
823 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
824 cls->sn_width);
825 MT_STORE_FIELD(w);
826 return 1;
827 case HID_DG_HEIGHT:
828 if (!(app->quirks & MT_QUIRK_NO_AREA)) {
829 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
830 cls->sn_height);
831
832 /*
833 * Only set ABS_MT_ORIENTATION if it is not
834 * already set by the HID_DG_AZIMUTH usage.
835 */
836 if (!test_bit(ABS_MT_ORIENTATION,
837 hi->input->absbit))
838 input_set_abs_params(hi->input,
839 ABS_MT_ORIENTATION, 0, 1, 0, 0);
840 }
841 MT_STORE_FIELD(h);
842 return 1;
843 case HID_DG_TIPPRESSURE:
844 set_abs(hi->input, ABS_MT_PRESSURE, field,
845 cls->sn_pressure);
846 MT_STORE_FIELD(p);
847 return 1;
848 case HID_DG_SCANTIME:
849 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
850 app->scantime = &field->value[usage->usage_index];
851 app->scantime_logical_max = field->logical_maximum;
852 return 1;
853 case HID_DG_CONTACTCOUNT:
854 app->have_contact_count = true;
855 app->raw_cc = &field->value[usage->usage_index];
856 return 1;
857 case HID_DG_AZIMUTH:
858 /*
859 * Azimuth has the range of [0, MAX) representing a full
860 * revolution. Set ABS_MT_ORIENTATION to a quarter of
861 * MAX according the definition of ABS_MT_ORIENTATION
862 */
863 input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
864 -field->logical_maximum / 4,
865 field->logical_maximum / 4,
866 cls->sn_move ?
867 field->logical_maximum / cls->sn_move : 0, 0);
868 MT_STORE_FIELD(a);
869 return 1;
870 case HID_DG_CONTACTMAX:
871 /* contact max are global to the report */
872 return -1;
873 case HID_DG_TOUCH:
874 /* Legacy devices use TIPSWITCH and not TOUCH.
875 * Let's just ignore this field. */
876 return -1;
877 }
878 /* let hid-input decide for the others */
879 return 0;
880
881 case HID_UP_BUTTON:
882 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
883 /*
884 * MS PTP spec says that external buttons left and right have
885 * usages 2 and 3.
886 */
887 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
888 field->application == HID_DG_TOUCHPAD &&
889 (usage->hid & HID_USAGE) > 1)
890 code--;
891
892 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
893 code = BTN_0 + ((usage->hid - 1) & HID_USAGE);
894
895 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
896 if (!*bit)
897 return -1;
898 input_set_capability(hi->input, EV_KEY, code);
899 return 1;
900
901 case 0xff000000:
902 /* we do not want to map these: no input-oriented meaning */
903 return -1;
904 }
905
906 return 0;
907}
908
909static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
910 struct mt_usages *slot,
911 struct input_dev *input)
912{
913 __s32 quirks = app->quirks;
914
915 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
916 return *slot->contactid;
917
918 if (quirks & MT_QUIRK_CYPRESS)
919 return cypress_compute_slot(app, slot);
920
921 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
922 return app->num_received;
923
924 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
925 return *slot->contactid - 1;
926
927 return input_mt_get_slot_by_key(input, *slot->contactid);
928}
929
930static void mt_release_pending_palms(struct mt_device *td,
931 struct mt_application *app,
932 struct input_dev *input)
933{
934 int slotnum;
935 bool need_sync = false;
936
937 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
938 clear_bit(slotnum, app->pending_palm_slots);
939
940 input_mt_slot(input, slotnum);
941 input_mt_report_slot_inactive(input);
942
943 need_sync = true;
944 }
945
946 if (need_sync) {
947 input_mt_sync_frame(input);
948 input_sync(input);
949 }
950}
951
952/*
953 * this function is called when a whole packet has been received and processed,
954 * so that it can decide what to send to the input layer.
955 */
956static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
957 struct input_dev *input)
958{
959 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
960 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
961
962 input_mt_sync_frame(input);
963 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
964 input_sync(input);
965
966 mt_release_pending_palms(td, app, input);
967
968 app->num_received = 0;
969 app->left_button_state = 0;
970
971 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
972 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
973 else
974 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
975 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
976}
977
978static int mt_compute_timestamp(struct mt_application *app, __s32 value)
979{
980 long delta = value - app->prev_scantime;
981 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
982
983 app->jiffies = jiffies;
984
985 if (delta < 0)
986 delta += app->scantime_logical_max;
987
988 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
989 delta *= 100;
990
991 if (jdelta > MAX_TIMESTAMP_INTERVAL)
992 /* No data received for a while, resync the timestamp. */
993 return 0;
994 else
995 return app->timestamp + delta;
996}
997
998static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
999 struct hid_usage *usage, __s32 value)
1000{
1001 /* we will handle the hidinput part later, now remains hiddev */
1002 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
1003 hid->hiddev_hid_event(hid, field, usage, value);
1004
1005 return 1;
1006}
1007
1008static int mt_process_slot(struct mt_device *td, struct input_dev *input,
1009 struct mt_application *app,
1010 struct mt_usages *slot)
1011{
1012 struct input_mt *mt = input->mt;
1013 struct hid_device *hdev = td->hdev;
1014 __s32 quirks = app->quirks;
1015 bool valid = true;
1016 bool confidence_state = true;
1017 bool inrange_state = false;
1018 int active;
1019 int slotnum;
1020 int tool = MT_TOOL_FINGER;
1021
1022 if (!slot)
1023 return -EINVAL;
1024
1025 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
1026 app->num_received >= app->num_expected)
1027 return -EAGAIN;
1028
1029 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
1030 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
1031 valid = *slot->inrange_state;
1032 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1033 valid = *slot->tip_state;
1034 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
1035 valid = *slot->confidence_state;
1036
1037 if (!valid)
1038 return 0;
1039 }
1040
1041 slotnum = mt_compute_slot(td, app, slot, input);
1042 if (slotnum < 0 || slotnum >= td->maxcontacts)
1043 return 0;
1044
1045 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1046 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1047
1048 if (input_mt_is_active(i_slot) &&
1049 input_mt_is_used(mt, i_slot))
1050 return -EAGAIN;
1051 }
1052
1053 if (quirks & MT_QUIRK_CONFIDENCE)
1054 confidence_state = *slot->confidence_state;
1055
1056 if (quirks & MT_QUIRK_HOVERING)
1057 inrange_state = *slot->inrange_state;
1058
1059 active = *slot->tip_state || inrange_state;
1060
1061 if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1062 tool = MT_TOOL_DIAL;
1063 else if (unlikely(!confidence_state)) {
1064 tool = MT_TOOL_PALM;
1065 if (!active && mt &&
1066 input_mt_is_active(&mt->slots[slotnum])) {
1067 /*
1068 * The non-confidence was reported for
1069 * previously valid contact that is also no
1070 * longer valid. We can't simply report
1071 * lift-off as userspace will not be aware
1072 * of non-confidence, so we need to split
1073 * it into 2 events: active MT_TOOL_PALM
1074 * and a separate liftoff.
1075 */
1076 active = true;
1077 set_bit(slotnum, app->pending_palm_slots);
1078 }
1079 }
1080
1081 input_mt_slot(input, slotnum);
1082 input_mt_report_slot_state(input, tool, active);
1083 if (active) {
1084 /* this finger is in proximity of the sensor */
1085 int wide = (*slot->w > *slot->h);
1086 int major = max(*slot->w, *slot->h);
1087 int minor = min(*slot->w, *slot->h);
1088 int orientation = wide;
1089 int max_azimuth;
1090 int azimuth;
1091 int x;
1092 int y;
1093 int cx;
1094 int cy;
1095
1096 if (slot->a != DEFAULT_ZERO) {
1097 /*
1098 * Azimuth is counter-clockwise and ranges from [0, MAX)
1099 * (a full revolution). Convert it to clockwise ranging
1100 * [-MAX/2, MAX/2].
1101 *
1102 * Note that ABS_MT_ORIENTATION require us to report
1103 * the limit of [-MAX/4, MAX/4], but the value can go
1104 * out of range to [-MAX/2, MAX/2] to report an upside
1105 * down ellipsis.
1106 */
1107 azimuth = *slot->a;
1108 max_azimuth = input_abs_get_max(input,
1109 ABS_MT_ORIENTATION);
1110 if (azimuth > max_azimuth * 2)
1111 azimuth -= max_azimuth * 4;
1112 orientation = -azimuth;
1113 if (quirks & MT_QUIRK_ORIENTATION_INVERT)
1114 orientation = -orientation;
1115
1116 }
1117
1118 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1119 /*
1120 * divided by two to match visual scale of touch
1121 * for devices with this quirk
1122 */
1123 major = major >> 1;
1124 minor = minor >> 1;
1125 }
1126
1127 x = hdev->quirks & HID_QUIRK_X_INVERT ?
1128 input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->x :
1129 *slot->x;
1130 y = hdev->quirks & HID_QUIRK_Y_INVERT ?
1131 input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->y :
1132 *slot->y;
1133 cx = hdev->quirks & HID_QUIRK_X_INVERT ?
1134 input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->cx :
1135 *slot->cx;
1136 cy = hdev->quirks & HID_QUIRK_Y_INVERT ?
1137 input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->cy :
1138 *slot->cy;
1139
1140 input_event(input, EV_ABS, ABS_MT_POSITION_X, x);
1141 input_event(input, EV_ABS, ABS_MT_POSITION_Y, y);
1142 input_event(input, EV_ABS, ABS_MT_TOOL_X, cx);
1143 input_event(input, EV_ABS, ABS_MT_TOOL_Y, cy);
1144 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1145 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1146 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1147 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1148 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1149
1150 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1151 }
1152
1153 return 0;
1154}
1155
1156static void mt_process_mt_event(struct hid_device *hid,
1157 struct mt_application *app,
1158 struct hid_field *field,
1159 struct hid_usage *usage,
1160 __s32 value,
1161 bool first_packet)
1162{
1163 __s32 quirks = app->quirks;
1164 struct input_dev *input = field->hidinput->input;
1165
1166 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1167 return;
1168
1169 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1170
1171 /*
1172 * For Win8 PTP touchpads we should only look at
1173 * non finger/touch events in the first_packet of a
1174 * (possible) multi-packet frame.
1175 */
1176 if (!first_packet)
1177 return;
1178
1179 /*
1180 * For Win8 PTP touchpads we map both the clickpad click
1181 * and any "external" left buttons to BTN_LEFT if a
1182 * device claims to have both we need to report 1 for
1183 * BTN_LEFT if either is pressed, so we or all values
1184 * together and report the result in mt_sync_frame().
1185 */
1186 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1187 app->left_button_state |= value;
1188 return;
1189 }
1190 }
1191
1192 input_event(input, usage->type, usage->code, value);
1193}
1194
1195static void mt_touch_report(struct hid_device *hid,
1196 struct mt_report_data *rdata)
1197{
1198 struct mt_device *td = hid_get_drvdata(hid);
1199 struct hid_report *report = rdata->report;
1200 struct mt_application *app = rdata->application;
1201 struct hid_field *field;
1202 struct input_dev *input;
1203 struct mt_usages *slot;
1204 bool first_packet;
1205 unsigned count;
1206 int r, n;
1207 int scantime = 0;
1208 int contact_count = -1;
1209
1210 /* sticky fingers release in progress, abort */
1211 if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1212 return;
1213
1214 scantime = *app->scantime;
1215 app->timestamp = mt_compute_timestamp(app, scantime);
1216 if (app->raw_cc != DEFAULT_ZERO)
1217 contact_count = *app->raw_cc;
1218
1219 /*
1220 * Includes multi-packet support where subsequent
1221 * packets are sent with zero contactcount.
1222 */
1223 if (contact_count >= 0) {
1224 /*
1225 * For Win8 PTPs the first packet (td->num_received == 0) may
1226 * have a contactcount of 0 if there only is a button event.
1227 * We double check that this is not a continuation packet
1228 * of a possible multi-packet frame be checking that the
1229 * timestamp has changed.
1230 */
1231 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1232 app->num_received == 0 &&
1233 app->prev_scantime != scantime)
1234 app->num_expected = contact_count;
1235 /* A non 0 contact count always indicates a first packet */
1236 else if (contact_count)
1237 app->num_expected = contact_count;
1238 }
1239 app->prev_scantime = scantime;
1240
1241 first_packet = app->num_received == 0;
1242
1243 input = report->field[0]->hidinput->input;
1244
1245 list_for_each_entry(slot, &app->mt_usages, list) {
1246 if (!mt_process_slot(td, input, app, slot))
1247 app->num_received++;
1248 }
1249
1250 for (r = 0; r < report->maxfield; r++) {
1251 field = report->field[r];
1252 count = field->report_count;
1253
1254 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1255 continue;
1256
1257 for (n = 0; n < count; n++)
1258 mt_process_mt_event(hid, app, field,
1259 &field->usage[n], field->value[n],
1260 first_packet);
1261 }
1262
1263 if (app->num_received >= app->num_expected)
1264 mt_sync_frame(td, app, input);
1265
1266 /*
1267 * Windows 8 specs says 2 things:
1268 * - once a contact has been reported, it has to be reported in each
1269 * subsequent report
1270 * - the report rate when fingers are present has to be at least
1271 * the refresh rate of the screen, 60 or 120 Hz
1272 *
1273 * I interprete this that the specification forces a report rate of
1274 * at least 60 Hz for a touchscreen to be certified.
1275 * Which means that if we do not get a report whithin 16 ms, either
1276 * something wrong happens, either the touchscreen forgets to send
1277 * a release. Taking a reasonable margin allows to remove issues
1278 * with USB communication or the load of the machine.
1279 *
1280 * Given that Win 8 devices are forced to send a release, this will
1281 * only affect laggish machines and the ones that have a firmware
1282 * defect.
1283 */
1284 if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1285 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1286 mod_timer(&td->release_timer,
1287 jiffies + msecs_to_jiffies(100));
1288 else
1289 del_timer(&td->release_timer);
1290 }
1291
1292 clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1293}
1294
1295static int mt_touch_input_configured(struct hid_device *hdev,
1296 struct hid_input *hi,
1297 struct mt_application *app)
1298{
1299 struct mt_device *td = hid_get_drvdata(hdev);
1300 struct mt_class *cls = &td->mtclass;
1301 struct input_dev *input = hi->input;
1302 int ret;
1303
1304 if (!td->maxcontacts)
1305 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1306
1307 mt_post_parse(td, app);
1308 if (td->serial_maybe)
1309 mt_post_parse_default_settings(td, app);
1310
1311 if (cls->is_indirect)
1312 app->mt_flags |= INPUT_MT_POINTER;
1313
1314 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1315 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1316
1317 /* check for clickpads */
1318 if ((app->mt_flags & INPUT_MT_POINTER) &&
1319 (app->buttons_count == 1))
1320 td->is_buttonpad = true;
1321
1322 if (td->is_buttonpad)
1323 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1324
1325 app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1326 BITS_TO_LONGS(td->maxcontacts),
1327 sizeof(long),
1328 GFP_KERNEL);
1329 if (!app->pending_palm_slots)
1330 return -ENOMEM;
1331
1332 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1333 if (ret)
1334 return ret;
1335
1336 app->mt_flags = 0;
1337 return 0;
1338}
1339
1340#define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1341 max, EV_KEY, (c))
1342static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1343 struct hid_field *field, struct hid_usage *usage,
1344 unsigned long **bit, int *max)
1345{
1346 struct mt_device *td = hid_get_drvdata(hdev);
1347 struct mt_application *application;
1348 struct mt_report_data *rdata;
1349
1350 rdata = mt_find_report_data(td, field->report);
1351 if (!rdata) {
1352 hid_err(hdev, "failed to allocate data for report\n");
1353 return 0;
1354 }
1355
1356 application = rdata->application;
1357
1358 /*
1359 * If mtclass.export_all_inputs is not set, only map fields from
1360 * TouchScreen or TouchPad collections. We need to ignore fields
1361 * that belong to other collections such as Mouse that might have
1362 * the same GenericDesktop usages.
1363 */
1364 if (!td->mtclass.export_all_inputs &&
1365 field->application != HID_DG_TOUCHSCREEN &&
1366 field->application != HID_DG_PEN &&
1367 field->application != HID_DG_TOUCHPAD &&
1368 field->application != HID_GD_KEYBOARD &&
1369 field->application != HID_GD_SYSTEM_CONTROL &&
1370 field->application != HID_CP_CONSUMER_CONTROL &&
1371 field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1372 field->application != HID_GD_SYSTEM_MULTIAXIS &&
1373 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1374 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1375 return -1;
1376
1377 /*
1378 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1379 * touchpad report descriptor. We need to treat these as an array to
1380 * map usages to input keys.
1381 */
1382 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1383 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1384 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1385 set_bit(EV_REP, hi->input->evbit);
1386 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1387 field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1388 switch (usage->hid & HID_USAGE) {
1389 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
1390 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
1391 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
1392 case 0x6b: mt_map_key_clear(KEY_F21); break;
1393 case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
1394 default:
1395 return -1;
1396 }
1397 return 1;
1398 }
1399
1400 if (rdata->is_mt_collection)
1401 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1402 application);
1403
1404 /*
1405 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1406 * for the stylus. Overwrite the hid_input application
1407 */
1408 if (field->physical == HID_DG_STYLUS)
1409 hi->application = HID_DG_STYLUS;
1410
1411 /* let hid-core decide for the others */
1412 return 0;
1413}
1414
1415static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1416 struct hid_field *field, struct hid_usage *usage,
1417 unsigned long **bit, int *max)
1418{
1419 struct mt_device *td = hid_get_drvdata(hdev);
1420 struct mt_report_data *rdata;
1421
1422 rdata = mt_find_report_data(td, field->report);
1423 if (rdata && rdata->is_mt_collection) {
1424 /* We own these mappings, tell hid-input to ignore them */
1425 return -1;
1426 }
1427
1428 /* let hid-core decide for the others */
1429 return 0;
1430}
1431
1432static int mt_event(struct hid_device *hid, struct hid_field *field,
1433 struct hid_usage *usage, __s32 value)
1434{
1435 struct mt_device *td = hid_get_drvdata(hid);
1436 struct mt_report_data *rdata;
1437
1438 rdata = mt_find_report_data(td, field->report);
1439 if (rdata && rdata->is_mt_collection)
1440 return mt_touch_event(hid, field, usage, value);
1441
1442 return 0;
1443}
1444
1445static void mt_report(struct hid_device *hid, struct hid_report *report)
1446{
1447 struct mt_device *td = hid_get_drvdata(hid);
1448 struct hid_field *field = report->field[0];
1449 struct mt_report_data *rdata;
1450
1451 if (!(hid->claimed & HID_CLAIMED_INPUT))
1452 return;
1453
1454 rdata = mt_find_report_data(td, report);
1455 if (rdata && rdata->is_mt_collection)
1456 return mt_touch_report(hid, rdata);
1457
1458 if (field && field->hidinput && field->hidinput->input)
1459 input_sync(field->hidinput->input);
1460}
1461
1462static bool mt_need_to_apply_feature(struct hid_device *hdev,
1463 struct hid_field *field,
1464 struct hid_usage *usage,
1465 enum latency_mode latency,
1466 bool surface_switch,
1467 bool button_switch,
1468 bool *inputmode_found)
1469{
1470 struct mt_device *td = hid_get_drvdata(hdev);
1471 struct mt_class *cls = &td->mtclass;
1472 struct hid_report *report = field->report;
1473 unsigned int index = usage->usage_index;
1474 char *buf;
1475 u32 report_len;
1476 int max;
1477
1478 switch (usage->hid) {
1479 case HID_DG_INPUTMODE:
1480 /*
1481 * Some elan panels wrongly declare 2 input mode features,
1482 * and silently ignore when we set the value in the second
1483 * field. Skip the second feature and hope for the best.
1484 */
1485 if (*inputmode_found)
1486 return false;
1487
1488 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1489 report_len = hid_report_len(report);
1490 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1491 if (!buf) {
1492 hid_err(hdev,
1493 "failed to allocate buffer for report\n");
1494 return false;
1495 }
1496 hid_hw_raw_request(hdev, report->id, buf, report_len,
1497 HID_FEATURE_REPORT,
1498 HID_REQ_GET_REPORT);
1499 kfree(buf);
1500 }
1501
1502 field->value[index] = td->inputmode_value;
1503 *inputmode_found = true;
1504 return true;
1505
1506 case HID_DG_CONTACTMAX:
1507 if (cls->maxcontacts) {
1508 max = min_t(int, field->logical_maximum,
1509 cls->maxcontacts);
1510 if (field->value[index] != max) {
1511 field->value[index] = max;
1512 return true;
1513 }
1514 }
1515 break;
1516
1517 case HID_DG_LATENCYMODE:
1518 field->value[index] = latency;
1519 return true;
1520
1521 case HID_DG_SURFACESWITCH:
1522 field->value[index] = surface_switch;
1523 return true;
1524
1525 case HID_DG_BUTTONSWITCH:
1526 field->value[index] = button_switch;
1527 return true;
1528 }
1529
1530 return false; /* no need to update the report */
1531}
1532
1533static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1534 bool surface_switch, bool button_switch)
1535{
1536 struct hid_report_enum *rep_enum;
1537 struct hid_report *rep;
1538 struct hid_usage *usage;
1539 int i, j;
1540 bool update_report;
1541 bool inputmode_found = false;
1542
1543 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1544 list_for_each_entry(rep, &rep_enum->report_list, list) {
1545 update_report = false;
1546
1547 for (i = 0; i < rep->maxfield; i++) {
1548 /* Ignore if report count is out of bounds. */
1549 if (rep->field[i]->report_count < 1)
1550 continue;
1551
1552 for (j = 0; j < rep->field[i]->maxusage; j++) {
1553 usage = &rep->field[i]->usage[j];
1554
1555 if (mt_need_to_apply_feature(hdev,
1556 rep->field[i],
1557 usage,
1558 latency,
1559 surface_switch,
1560 button_switch,
1561 &inputmode_found))
1562 update_report = true;
1563 }
1564 }
1565
1566 if (update_report)
1567 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1568 }
1569}
1570
1571static void mt_post_parse_default_settings(struct mt_device *td,
1572 struct mt_application *app)
1573{
1574 __s32 quirks = app->quirks;
1575
1576 /* unknown serial device needs special quirks */
1577 if (list_is_singular(&app->mt_usages)) {
1578 quirks |= MT_QUIRK_ALWAYS_VALID;
1579 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1580 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1581 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1582 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1583 }
1584
1585 app->quirks = quirks;
1586}
1587
1588static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1589{
1590 if (!app->have_contact_count)
1591 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1592}
1593
1594static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1595{
1596 struct mt_device *td = hid_get_drvdata(hdev);
1597 const char *suffix = NULL;
1598 struct mt_report_data *rdata;
1599 struct mt_application *mt_application = NULL;
1600 struct hid_report *report;
1601 int ret;
1602
1603 list_for_each_entry(report, &hi->reports, hidinput_list) {
1604 rdata = mt_find_report_data(td, report);
1605 if (!rdata) {
1606 hid_err(hdev, "failed to allocate data for report\n");
1607 return -ENOMEM;
1608 }
1609
1610 mt_application = rdata->application;
1611
1612 if (rdata->is_mt_collection) {
1613 ret = mt_touch_input_configured(hdev, hi,
1614 mt_application);
1615 if (ret)
1616 return ret;
1617 }
1618 }
1619
1620 switch (hi->application) {
1621 case HID_GD_KEYBOARD:
1622 case HID_GD_KEYPAD:
1623 case HID_GD_MOUSE:
1624 case HID_DG_TOUCHPAD:
1625 case HID_GD_SYSTEM_CONTROL:
1626 case HID_CP_CONSUMER_CONTROL:
1627 case HID_GD_WIRELESS_RADIO_CTLS:
1628 case HID_GD_SYSTEM_MULTIAXIS:
1629 /* already handled by hid core */
1630 break;
1631 case HID_DG_TOUCHSCREEN:
1632 /* we do not set suffix = "Touchscreen" */
1633 hi->input->name = hdev->name;
1634 break;
1635 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1636 suffix = "Custom Media Keys";
1637 break;
1638 case HID_DG_STYLUS:
1639 /* force BTN_STYLUS to allow tablet matching in udev */
1640 __set_bit(BTN_STYLUS, hi->input->keybit);
1641 break;
1642 default:
1643 suffix = "UNKNOWN";
1644 break;
1645 }
1646
1647 if (suffix)
1648 hi->input->name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
1649 "%s %s", hdev->name, suffix);
1650
1651 return 0;
1652}
1653
1654static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1655{
1656 if (field->usage[0].hid != usage ||
1657 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1658 return;
1659
1660 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1661 field->flags |= HID_MAIN_ITEM_VARIABLE;
1662}
1663
1664static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1665{
1666 struct hid_report *report;
1667 int i;
1668
1669 list_for_each_entry(report,
1670 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1671 list) {
1672
1673 if (!report->maxfield)
1674 continue;
1675
1676 for (i = 0; i < report->maxfield; i++)
1677 if (report->field[i]->maxusage >= 1)
1678 mt_fix_const_field(report->field[i], usage);
1679 }
1680}
1681
1682static void mt_release_contacts(struct hid_device *hid)
1683{
1684 struct hid_input *hidinput;
1685 struct mt_application *application;
1686 struct mt_device *td = hid_get_drvdata(hid);
1687
1688 list_for_each_entry(hidinput, &hid->inputs, list) {
1689 struct input_dev *input_dev = hidinput->input;
1690 struct input_mt *mt = input_dev->mt;
1691 int i;
1692
1693 if (mt) {
1694 for (i = 0; i < mt->num_slots; i++) {
1695 input_mt_slot(input_dev, i);
1696 input_mt_report_slot_inactive(input_dev);
1697 }
1698 input_mt_sync_frame(input_dev);
1699 input_sync(input_dev);
1700 }
1701 }
1702
1703 list_for_each_entry(application, &td->applications, list) {
1704 application->num_received = 0;
1705 }
1706}
1707
1708static void mt_expired_timeout(struct timer_list *t)
1709{
1710 struct mt_device *td = from_timer(td, t, release_timer);
1711 struct hid_device *hdev = td->hdev;
1712
1713 /*
1714 * An input report came in just before we release the sticky fingers,
1715 * it will take care of the sticky fingers.
1716 */
1717 if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1718 return;
1719 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1720 mt_release_contacts(hdev);
1721 clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1722}
1723
1724static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1725{
1726 int ret, i;
1727 struct mt_device *td;
1728 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1729
1730 for (i = 0; mt_classes[i].name ; i++) {
1731 if (id->driver_data == mt_classes[i].name) {
1732 mtclass = &(mt_classes[i]);
1733 break;
1734 }
1735 }
1736
1737 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1738 if (!td) {
1739 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1740 return -ENOMEM;
1741 }
1742 td->hdev = hdev;
1743 td->mtclass = *mtclass;
1744 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1745 hid_set_drvdata(hdev, td);
1746
1747 INIT_LIST_HEAD(&td->applications);
1748 INIT_LIST_HEAD(&td->reports);
1749
1750 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1751 td->serial_maybe = true;
1752
1753
1754 /* Orientation is inverted if the X or Y axes are
1755 * flipped, but normalized if both are inverted.
1756 */
1757 if (hdev->quirks & (HID_QUIRK_X_INVERT | HID_QUIRK_Y_INVERT) &&
1758 !((hdev->quirks & HID_QUIRK_X_INVERT)
1759 && (hdev->quirks & HID_QUIRK_Y_INVERT)))
1760 td->mtclass.quirks = MT_QUIRK_ORIENTATION_INVERT;
1761
1762 /* This allows the driver to correctly support devices
1763 * that emit events over several HID messages.
1764 */
1765 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1766
1767 /*
1768 * This allows the driver to handle different input sensors
1769 * that emits events through different applications on the same HID
1770 * device.
1771 */
1772 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1773
1774 if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1775 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1776
1777 if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) {
1778 hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP;
1779 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1780 }
1781
1782 timer_setup(&td->release_timer, mt_expired_timeout, 0);
1783
1784 ret = hid_parse(hdev);
1785 if (ret != 0)
1786 return ret;
1787
1788 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1789 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1790
1791 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1792 if (ret)
1793 return ret;
1794
1795 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1796 if (ret)
1797 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1798 hdev->name);
1799
1800 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1801
1802 return 0;
1803}
1804
1805static int mt_suspend(struct hid_device *hdev, pm_message_t state)
1806{
1807 struct mt_device *td = hid_get_drvdata(hdev);
1808
1809 /* High latency is desirable for power savings during S3/S0ix */
1810 if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) ||
1811 !hid_hw_may_wakeup(hdev))
1812 mt_set_modes(hdev, HID_LATENCY_HIGH, false, false);
1813 else
1814 mt_set_modes(hdev, HID_LATENCY_HIGH, true, true);
1815
1816 return 0;
1817}
1818
1819static int mt_reset_resume(struct hid_device *hdev)
1820{
1821 mt_release_contacts(hdev);
1822 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1823 return 0;
1824}
1825
1826static int mt_resume(struct hid_device *hdev)
1827{
1828 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1829 * It should be safe to send it to other devices too.
1830 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1831
1832 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1833
1834 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1835
1836 return 0;
1837}
1838
1839static void mt_remove(struct hid_device *hdev)
1840{
1841 struct mt_device *td = hid_get_drvdata(hdev);
1842
1843 del_timer_sync(&td->release_timer);
1844
1845 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1846 hid_hw_stop(hdev);
1847}
1848
1849/*
1850 * This list contains only:
1851 * - VID/PID of products not working with the default multitouch handling
1852 * - 2 generic rules.
1853 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1854 */
1855static const struct hid_device_id mt_devices[] = {
1856
1857 /* 3M panels */
1858 { .driver_data = MT_CLS_3M,
1859 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1860 USB_DEVICE_ID_3M1968) },
1861 { .driver_data = MT_CLS_3M,
1862 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1863 USB_DEVICE_ID_3M2256) },
1864 { .driver_data = MT_CLS_3M,
1865 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1866 USB_DEVICE_ID_3M3266) },
1867
1868 /* Anton devices */
1869 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1870 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1871 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1872
1873 /* Asus T101HA */
1874 { .driver_data = MT_CLS_WIN_8_DISABLE_WAKEUP,
1875 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1876 USB_VENDOR_ID_ASUSTEK,
1877 USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD) },
1878
1879 /* Asus T304UA */
1880 { .driver_data = MT_CLS_ASUS,
1881 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1882 USB_VENDOR_ID_ASUSTEK,
1883 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1884
1885 /* Atmel panels */
1886 { .driver_data = MT_CLS_SERIAL,
1887 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1888 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1889
1890 /* Baanto multitouch devices */
1891 { .driver_data = MT_CLS_NSMU,
1892 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1893 USB_DEVICE_ID_BAANTO_MT_190W2) },
1894
1895 /* Cando panels */
1896 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1897 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1898 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1899 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1900 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1901 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1902
1903 /* Chunghwa Telecom touch panels */
1904 { .driver_data = MT_CLS_NSMU,
1905 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1906 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1907
1908 /* CJTouch panels */
1909 { .driver_data = MT_CLS_NSMU,
1910 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1911 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1912 { .driver_data = MT_CLS_NSMU,
1913 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1914 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1915
1916 /* CVTouch panels */
1917 { .driver_data = MT_CLS_NSMU,
1918 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1919 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1920
1921 /* eGalax devices (SAW) */
1922 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1923 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1924 USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER) },
1925
1926 /* eGalax devices (resistive) */
1927 { .driver_data = MT_CLS_EGALAX,
1928 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1929 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1930 { .driver_data = MT_CLS_EGALAX,
1931 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1932 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1933
1934 /* eGalax devices (capacitive) */
1935 { .driver_data = MT_CLS_EGALAX_SERIAL,
1936 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1937 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1938 { .driver_data = MT_CLS_EGALAX,
1939 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1940 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1941 { .driver_data = MT_CLS_EGALAX_SERIAL,
1942 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1943 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1944 { .driver_data = MT_CLS_EGALAX_SERIAL,
1945 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1946 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1947 { .driver_data = MT_CLS_EGALAX_SERIAL,
1948 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1949 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1950 { .driver_data = MT_CLS_EGALAX_SERIAL,
1951 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1952 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1953 { .driver_data = MT_CLS_EGALAX,
1954 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1955 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1956 { .driver_data = MT_CLS_EGALAX,
1957 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1958 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1959 { .driver_data = MT_CLS_EGALAX_SERIAL,
1960 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1961 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1962 { .driver_data = MT_CLS_EGALAX,
1963 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1964 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1965 { .driver_data = MT_CLS_EGALAX,
1966 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1967 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1968 { .driver_data = MT_CLS_EGALAX,
1969 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1970 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1971 { .driver_data = MT_CLS_EGALAX,
1972 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1973 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1974 { .driver_data = MT_CLS_EGALAX_SERIAL,
1975 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1976 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1977 { .driver_data = MT_CLS_EGALAX_SERIAL,
1978 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1979 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1980 { .driver_data = MT_CLS_EGALAX_SERIAL,
1981 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1982 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1983 { .driver_data = MT_CLS_EGALAX,
1984 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1985 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
1986
1987 /* Elan devices */
1988 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1989 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1990 USB_VENDOR_ID_ELAN, 0x313a) },
1991
1992 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1993 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1994 USB_VENDOR_ID_ELAN, 0x3148) },
1995
1996 /* Elitegroup panel */
1997 { .driver_data = MT_CLS_SERIAL,
1998 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1999 USB_DEVICE_ID_ELITEGROUP_05D8) },
2000
2001 /* Flatfrog Panels */
2002 { .driver_data = MT_CLS_FLATFROG,
2003 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
2004 USB_DEVICE_ID_MULTITOUCH_3200) },
2005
2006 /* FocalTech Panels */
2007 { .driver_data = MT_CLS_SERIAL,
2008 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
2009 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
2010
2011 /* GeneralTouch panel */
2012 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2013 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2014 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
2015 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2016 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2017 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
2018 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2019 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2020 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
2021 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2022 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2023 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
2024 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2025 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2026 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
2027 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2028 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2029 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
2030 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2031 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2032 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
2033
2034 /* Gametel game controller */
2035 { .driver_data = MT_CLS_NSMU,
2036 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
2037 USB_DEVICE_ID_GAMETEL_MT_MODE) },
2038
2039 /* GoodTouch panels */
2040 { .driver_data = MT_CLS_NSMU,
2041 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
2042 USB_DEVICE_ID_GOODTOUCH_000f) },
2043
2044 /* Hanvon panels */
2045 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2046 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
2047 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
2048
2049 /* HONOR GLO-GXXX panel */
2050 { .driver_data = MT_CLS_VTL,
2051 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2052 0x347d, 0x7853) },
2053
2054 /* Ilitek dual touch panel */
2055 { .driver_data = MT_CLS_NSMU,
2056 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
2057 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
2058
2059 /* LG Melfas panel */
2060 { .driver_data = MT_CLS_LG,
2061 HID_USB_DEVICE(USB_VENDOR_ID_LG,
2062 USB_DEVICE_ID_LG_MELFAS_MT) },
2063 { .driver_data = MT_CLS_LG,
2064 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
2065 USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
2066
2067 /* Lenovo X1 TAB Gen 2 */
2068 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2069 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2070 USB_VENDOR_ID_LENOVO,
2071 USB_DEVICE_ID_LENOVO_X1_TAB) },
2072
2073 /* Lenovo X1 TAB Gen 3 */
2074 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2075 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2076 USB_VENDOR_ID_LENOVO,
2077 USB_DEVICE_ID_LENOVO_X1_TAB3) },
2078
2079 /* Lenovo X12 TAB Gen 1 */
2080 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2081 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2082 USB_VENDOR_ID_LENOVO,
2083 USB_DEVICE_ID_LENOVO_X12_TAB) },
2084
2085 /* MosArt panels */
2086 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2087 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2088 USB_DEVICE_ID_ASUS_T91MT)},
2089 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2090 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2091 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
2092 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2093 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
2094 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
2095
2096 /* Novatek Panel */
2097 { .driver_data = MT_CLS_NSMU,
2098 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2099 USB_DEVICE_ID_NOVATEK_PCT) },
2100
2101 /* Ntrig Panel */
2102 { .driver_data = MT_CLS_NSMU,
2103 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2104 USB_VENDOR_ID_NTRIG, 0x1b05) },
2105
2106 /* Panasonic panels */
2107 { .driver_data = MT_CLS_PANASONIC,
2108 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2109 USB_DEVICE_ID_PANABOARD_UBT780) },
2110 { .driver_data = MT_CLS_PANASONIC,
2111 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2112 USB_DEVICE_ID_PANABOARD_UBT880) },
2113
2114 /* PixArt optical touch screen */
2115 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2116 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2117 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2118 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2119 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2120 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2121 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2122 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2123 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2124
2125 /* PixCir-based panels */
2126 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2127 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2128 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2129
2130 /* Quanta-based panels */
2131 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2132 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2133 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2134
2135 /* Razer touchpads */
2136 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2137 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2138 USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2139
2140 /* Smart Tech panels */
2141 { .driver_data = MT_CLS_SMART_TECH,
2142 MT_USB_DEVICE(0x0b8c, 0x0092)},
2143
2144 /* Stantum panels */
2145 { .driver_data = MT_CLS_CONFIDENCE,
2146 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2147 USB_DEVICE_ID_MTP_STM)},
2148
2149 /* Synaptics devices */
2150 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2151 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2152 USB_VENDOR_ID_SYNAPTICS, 0xcd7e) },
2153
2154 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2155 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2156 USB_VENDOR_ID_SYNAPTICS, 0xcddc) },
2157
2158 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2159 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2160 USB_VENDOR_ID_SYNAPTICS, 0xce08) },
2161
2162 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2163 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2164 USB_VENDOR_ID_SYNAPTICS, 0xce09) },
2165
2166 /* TopSeed panels */
2167 { .driver_data = MT_CLS_TOPSEED,
2168 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2169 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2170
2171 /* Touch International panels */
2172 { .driver_data = MT_CLS_NSMU,
2173 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2174 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2175
2176 /* Unitec panels */
2177 { .driver_data = MT_CLS_NSMU,
2178 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2179 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2180 { .driver_data = MT_CLS_NSMU,
2181 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2182 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2183
2184 /* VTL panels */
2185 { .driver_data = MT_CLS_VTL,
2186 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2187 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2188
2189 /* Winbond Electronics Corp. */
2190 { .driver_data = MT_CLS_WIN_8_NO_STICKY_FINGERS,
2191 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2192 USB_VENDOR_ID_WINBOND, USB_DEVICE_ID_TSTP_MTOUCH) },
2193
2194 /* Wistron panels */
2195 { .driver_data = MT_CLS_NSMU,
2196 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2197 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2198
2199 /* XAT */
2200 { .driver_data = MT_CLS_NSMU,
2201 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2202 USB_DEVICE_ID_XAT_CSR) },
2203
2204 /* Xiroku */
2205 { .driver_data = MT_CLS_NSMU,
2206 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2207 USB_DEVICE_ID_XIROKU_SPX) },
2208 { .driver_data = MT_CLS_NSMU,
2209 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2210 USB_DEVICE_ID_XIROKU_MPX) },
2211 { .driver_data = MT_CLS_NSMU,
2212 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2213 USB_DEVICE_ID_XIROKU_CSR) },
2214 { .driver_data = MT_CLS_NSMU,
2215 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2216 USB_DEVICE_ID_XIROKU_SPX1) },
2217 { .driver_data = MT_CLS_NSMU,
2218 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2219 USB_DEVICE_ID_XIROKU_MPX1) },
2220 { .driver_data = MT_CLS_NSMU,
2221 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2222 USB_DEVICE_ID_XIROKU_CSR1) },
2223 { .driver_data = MT_CLS_NSMU,
2224 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2225 USB_DEVICE_ID_XIROKU_SPX2) },
2226 { .driver_data = MT_CLS_NSMU,
2227 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2228 USB_DEVICE_ID_XIROKU_MPX2) },
2229 { .driver_data = MT_CLS_NSMU,
2230 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2231 USB_DEVICE_ID_XIROKU_CSR2) },
2232
2233 /* Google MT devices */
2234 { .driver_data = MT_CLS_GOOGLE,
2235 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2236 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2237 { .driver_data = MT_CLS_GOOGLE,
2238 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_GOOGLE,
2239 USB_DEVICE_ID_GOOGLE_WHISKERS) },
2240
2241 /* Generic MT device */
2242 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2243
2244 /* Generic Win 8 certified MT device */
2245 { .driver_data = MT_CLS_WIN_8,
2246 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2247 HID_ANY_ID, HID_ANY_ID) },
2248 { }
2249};
2250MODULE_DEVICE_TABLE(hid, mt_devices);
2251
2252static const struct hid_usage_id mt_grabbed_usages[] = {
2253 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2254 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2255};
2256
2257static struct hid_driver mt_driver = {
2258 .name = "hid-multitouch",
2259 .id_table = mt_devices,
2260 .probe = mt_probe,
2261 .remove = mt_remove,
2262 .input_mapping = mt_input_mapping,
2263 .input_mapped = mt_input_mapped,
2264 .input_configured = mt_input_configured,
2265 .feature_mapping = mt_feature_mapping,
2266 .usage_table = mt_grabbed_usages,
2267 .event = mt_event,
2268 .report = mt_report,
2269 .suspend = pm_ptr(mt_suspend),
2270 .reset_resume = pm_ptr(mt_reset_resume),
2271 .resume = pm_ptr(mt_resume),
2272};
2273module_hid_driver(mt_driver);