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serial: tegra: drop bogus NULL tty-port checks
[linux/fpc-iii.git] / drivers / hid / hid-multitouch.c
blob3f94b4954225b38ea6fa4bea9194bebb1ab8b383
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
44 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
45 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
46 MODULE_DESCRIPTION("HID multitouch panels");
47 MODULE_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
74 #define MT_INPUTMODE_TOUCHSCREEN 0x02
75 #define MT_INPUTMODE_TOUCHPAD 0x03
76
77 #define MT_BUTTONTYPE_CLICKPAD 0
78
79 enum latency_mode {
80 HID_LATENCY_NORMAL = 0,
81 HID_LATENCY_HIGH = 1,
82 };
83
84 #define MT_IO_FLAGS_RUNNING 0
85 #define MT_IO_FLAGS_ACTIVE_SLOTS 1
86 #define MT_IO_FLAGS_PENDING_SLOTS 2
87
88 static const bool mtrue = true; /* default for true */
89 static const bool mfalse; /* default for false */
90 static const __s32 mzero; /* default for 0 */
91
92 #define DEFAULT_TRUE ((void *)&mtrue)
93 #define DEFAULT_FALSE ((void *)&mfalse)
94 #define DEFAULT_ZERO ((void *)&mzero)
95
96 struct mt_usages {
97 struct list_head list;
98 __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
99 __s32 *contactid; /* the device ContactID assigned to this slot */
100 bool *tip_state; /* is the touch valid? */
101 bool *inrange_state; /* is the finger in proximity of the sensor? */
102 bool *confidence_state; /* is the touch made by a finger? */
103 };
104
105 struct mt_application {
106 struct list_head list;
107 unsigned int application;
108 unsigned int report_id;
109 struct list_head mt_usages; /* mt usages list */
110
111 __s32 quirks;
112
113 __s32 *scantime; /* scantime reported */
114 __s32 scantime_logical_max; /* max value for raw scantime */
115
116 __s32 *raw_cc; /* contact count in the report */
117 int left_button_state; /* left button state */
118 unsigned int mt_flags; /* flags to pass to input-mt */
119
120 unsigned long *pending_palm_slots; /* slots where we reported palm
121 * and need to release */
122
123 __u8 num_received; /* how many contacts we received */
124 __u8 num_expected; /* expected last contact index */
125 __u8 buttons_count; /* number of physical buttons per touchpad */
126 __u8 touches_by_report; /* how many touches are present in one report:
127 * 1 means we should use a serial protocol
128 * > 1 means hybrid (multitouch) protocol
129 */
130
131 __s32 dev_time; /* the scan time provided by the device */
132 unsigned long jiffies; /* the frame's jiffies */
133 int timestamp; /* the timestamp to be sent */
134 int prev_scantime; /* scantime reported previously */
135
136 bool have_contact_count;
137 };
138
139 struct mt_class {
140 __s32 name; /* MT_CLS */
141 __s32 quirks;
142 __s32 sn_move; /* Signal/noise ratio for move events */
143 __s32 sn_width; /* Signal/noise ratio for width events */
144 __s32 sn_height; /* Signal/noise ratio for height events */
145 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
146 __u8 maxcontacts;
147 bool is_indirect; /* true for touchpads */
148 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
149 };
150
151 struct mt_report_data {
152 struct list_head list;
153 struct hid_report *report;
154 struct mt_application *application;
155 bool is_mt_collection;
156 };
157
158 struct mt_device {
159 struct mt_class mtclass; /* our mt device class */
160 struct timer_list release_timer; /* to release sticky fingers */
161 struct hid_device *hdev; /* hid_device we're attached to */
162 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
163 __u8 inputmode_value; /* InputMode HID feature value */
164 __u8 maxcontacts;
165 bool is_buttonpad; /* is this device a button pad? */
166 bool serial_maybe; /* need to check for serial protocol */
167
168 struct list_head applications;
169 struct list_head reports;
170 };
171
172 static void mt_post_parse_default_settings(struct mt_device *td,
173 struct mt_application *app);
174 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
175
176 /* classes of device behavior */
177 #define MT_CLS_DEFAULT 0x0001
178
179 #define MT_CLS_SERIAL 0x0002
180 #define MT_CLS_CONFIDENCE 0x0003
181 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
182 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
183 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
184 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
185 /* reserved 0x0008 */
186 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
187 #define MT_CLS_NSMU 0x000a
188 /* reserved 0x0010 */
189 /* reserved 0x0011 */
190 #define MT_CLS_WIN_8 0x0012
191 #define MT_CLS_EXPORT_ALL_INPUTS 0x0013
192 /* reserved 0x0014 */
193 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT 0x0015
194
195 /* vendor specific classes */
196 #define MT_CLS_3M 0x0101
197 /* reserved 0x0102 */
198 #define MT_CLS_EGALAX 0x0103
199 #define MT_CLS_EGALAX_SERIAL 0x0104
200 #define MT_CLS_TOPSEED 0x0105
201 #define MT_CLS_PANASONIC 0x0106
202 #define MT_CLS_FLATFROG 0x0107
203 #define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
204 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
205 #define MT_CLS_LG 0x010a
206 #define MT_CLS_ASUS 0x010b
207 #define MT_CLS_VTL 0x0110
208 #define MT_CLS_GOOGLE 0x0111
209 #define MT_CLS_RAZER_BLADE_STEALTH 0x0112
210 #define MT_CLS_SMART_TECH 0x0113
211
212 #define MT_DEFAULT_MAXCONTACT 10
213 #define MT_MAX_MAXCONTACT 250
214
215 /*
216 * Resync device and local timestamps after that many microseconds without
217 * receiving data.
218 */
219 #define MAX_TIMESTAMP_INTERVAL 1000000
220
221 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
222 #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
223
224 /*
225 * these device-dependent functions determine what slot corresponds
226 * to a valid contact that was just read.
227 */
228
229 static int cypress_compute_slot(struct mt_application *application,
230 struct mt_usages *slot)
231 {
232 if (*slot->contactid != 0 || application->num_received == 0)
233 return *slot->contactid;
234 else
235 return -1;
236 }
237
238 static const struct mt_class mt_classes[] = {
239 { .name = MT_CLS_DEFAULT,
240 .quirks = MT_QUIRK_ALWAYS_VALID |
241 MT_QUIRK_CONTACT_CNT_ACCURATE },
242 { .name = MT_CLS_NSMU,
243 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
244 { .name = MT_CLS_SERIAL,
245 .quirks = MT_QUIRK_ALWAYS_VALID},
246 { .name = MT_CLS_CONFIDENCE,
247 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
248 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
249 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
250 MT_QUIRK_SLOT_IS_CONTACTID },
251 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
252 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
253 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
254 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
255 .quirks = MT_QUIRK_VALID_IS_INRANGE |
256 MT_QUIRK_SLOT_IS_CONTACTID,
257 .maxcontacts = 2 },
258 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
259 .quirks = MT_QUIRK_VALID_IS_INRANGE |
260 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
261 .maxcontacts = 2 },
262 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
263 .quirks = MT_QUIRK_VALID_IS_INRANGE |
264 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
265 { .name = MT_CLS_WIN_8,
266 .quirks = MT_QUIRK_ALWAYS_VALID |
267 MT_QUIRK_IGNORE_DUPLICATES |
268 MT_QUIRK_HOVERING |
269 MT_QUIRK_CONTACT_CNT_ACCURATE |
270 MT_QUIRK_STICKY_FINGERS |
271 MT_QUIRK_WIN8_PTP_BUTTONS,
272 .export_all_inputs = true },
273 { .name = MT_CLS_EXPORT_ALL_INPUTS,
274 .quirks = MT_QUIRK_ALWAYS_VALID |
275 MT_QUIRK_CONTACT_CNT_ACCURATE,
276 .export_all_inputs = true },
277 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
278 .quirks = MT_QUIRK_ALWAYS_VALID |
279 MT_QUIRK_IGNORE_DUPLICATES |
280 MT_QUIRK_HOVERING |
281 MT_QUIRK_CONTACT_CNT_ACCURATE |
282 MT_QUIRK_STICKY_FINGERS |
283 MT_QUIRK_WIN8_PTP_BUTTONS |
284 MT_QUIRK_FORCE_MULTI_INPUT,
285 .export_all_inputs = true },
286
287 /*
288 * vendor specific classes
289 */
290 { .name = MT_CLS_3M,
291 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
292 MT_QUIRK_SLOT_IS_CONTACTID |
293 MT_QUIRK_TOUCH_SIZE_SCALING,
294 .sn_move = 2048,
295 .sn_width = 128,
296 .sn_height = 128,
297 .maxcontacts = 60,
298 },
299 { .name = MT_CLS_EGALAX,
300 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
301 MT_QUIRK_VALID_IS_INRANGE,
302 .sn_move = 4096,
303 .sn_pressure = 32,
304 },
305 { .name = MT_CLS_EGALAX_SERIAL,
306 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
307 MT_QUIRK_ALWAYS_VALID,
308 .sn_move = 4096,
309 .sn_pressure = 32,
310 },
311 { .name = MT_CLS_TOPSEED,
312 .quirks = MT_QUIRK_ALWAYS_VALID,
313 .is_indirect = true,
314 .maxcontacts = 2,
315 },
316 { .name = MT_CLS_PANASONIC,
317 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
318 .maxcontacts = 4 },
319 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
320 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
321 MT_QUIRK_VALID_IS_INRANGE |
322 MT_QUIRK_SLOT_IS_CONTACTID,
323 .maxcontacts = 2
324 },
325 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
326 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
327 MT_QUIRK_SLOT_IS_CONTACTID
328 },
329
330 { .name = MT_CLS_FLATFROG,
331 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
332 MT_QUIRK_NO_AREA,
333 .sn_move = 2048,
334 .maxcontacts = 40,
335 },
336 { .name = MT_CLS_LG,
337 .quirks = MT_QUIRK_ALWAYS_VALID |
338 MT_QUIRK_FIX_CONST_CONTACT_ID |
339 MT_QUIRK_IGNORE_DUPLICATES |
340 MT_QUIRK_HOVERING |
341 MT_QUIRK_CONTACT_CNT_ACCURATE },
342 { .name = MT_CLS_ASUS,
343 .quirks = MT_QUIRK_ALWAYS_VALID |
344 MT_QUIRK_CONTACT_CNT_ACCURATE |
345 MT_QUIRK_ASUS_CUSTOM_UP },
346 { .name = MT_CLS_VTL,
347 .quirks = MT_QUIRK_ALWAYS_VALID |
348 MT_QUIRK_CONTACT_CNT_ACCURATE |
349 MT_QUIRK_FORCE_GET_FEATURE,
350 },
351 { .name = MT_CLS_GOOGLE,
352 .quirks = MT_QUIRK_ALWAYS_VALID |
353 MT_QUIRK_CONTACT_CNT_ACCURATE |
354 MT_QUIRK_SLOT_IS_CONTACTID |
355 MT_QUIRK_HOVERING
356 },
357 { .name = MT_CLS_RAZER_BLADE_STEALTH,
358 .quirks = MT_QUIRK_ALWAYS_VALID |
359 MT_QUIRK_IGNORE_DUPLICATES |
360 MT_QUIRK_HOVERING |
361 MT_QUIRK_CONTACT_CNT_ACCURATE |
362 MT_QUIRK_WIN8_PTP_BUTTONS,
363 },
364 { .name = MT_CLS_SMART_TECH,
365 .quirks = MT_QUIRK_ALWAYS_VALID |
366 MT_QUIRK_IGNORE_DUPLICATES |
367 MT_QUIRK_CONTACT_CNT_ACCURATE |
368 MT_QUIRK_SEPARATE_APP_REPORT,
369 },
370 { }
371 };
372
373 static ssize_t mt_show_quirks(struct device *dev,
374 struct device_attribute *attr,
375 char *buf)
376 {
377 struct hid_device *hdev = to_hid_device(dev);
378 struct mt_device *td = hid_get_drvdata(hdev);
379
380 return sprintf(buf, "%u\n", td->mtclass.quirks);
381 }
382
383 static ssize_t mt_set_quirks(struct device *dev,
384 struct device_attribute *attr,
385 const char *buf, size_t count)
386 {
387 struct hid_device *hdev = to_hid_device(dev);
388 struct mt_device *td = hid_get_drvdata(hdev);
389 struct mt_application *application;
390
391 unsigned long val;
392
393 if (kstrtoul(buf, 0, &val))
394 return -EINVAL;
395
396 td->mtclass.quirks = val;
397
398 list_for_each_entry(application, &td->applications, list) {
399 application->quirks = val;
400 if (!application->have_contact_count)
401 application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
402 }
403
404 return count;
405 }
406
407 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
408
409 static struct attribute *sysfs_attrs[] = {
410 &dev_attr_quirks.attr,
411 NULL
412 };
413
414 static const struct attribute_group mt_attribute_group = {
415 .attrs = sysfs_attrs
416 };
417
418 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
419 {
420 int ret;
421 u32 size = hid_report_len(report);
422 u8 *buf;
423
424 /*
425 * Do not fetch the feature report if the device has been explicitly
426 * marked as non-capable.
427 */
428 if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
429 return;
430
431 buf = hid_alloc_report_buf(report, GFP_KERNEL);
432 if (!buf)
433 return;
434
435 ret = hid_hw_raw_request(hdev, report->id, buf, size,
436 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
437 if (ret < 0) {
438 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
439 report->id);
440 } else {
441 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
442 size, 0);
443 if (ret)
444 dev_warn(&hdev->dev, "failed to report feature\n");
445 }
446
447 kfree(buf);
448 }
449
450 static void mt_feature_mapping(struct hid_device *hdev,
451 struct hid_field *field, struct hid_usage *usage)
452 {
453 struct mt_device *td = hid_get_drvdata(hdev);
454
455 switch (usage->hid) {
456 case HID_DG_CONTACTMAX:
457 mt_get_feature(hdev, field->report);
458
459 td->maxcontacts = field->value[0];
460 if (!td->maxcontacts &&
461 field->logical_maximum <= MT_MAX_MAXCONTACT)
462 td->maxcontacts = field->logical_maximum;
463 if (td->mtclass.maxcontacts)
464 /* check if the maxcontacts is given by the class */
465 td->maxcontacts = td->mtclass.maxcontacts;
466
467 break;
468 case HID_DG_BUTTONTYPE:
469 if (usage->usage_index >= field->report_count) {
470 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
471 break;
472 }
473
474 mt_get_feature(hdev, field->report);
475 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
476 td->is_buttonpad = true;
477
478 break;
479 case 0xff0000c5:
480 /* Retrieve the Win8 blob once to enable some devices */
481 if (usage->usage_index == 0)
482 mt_get_feature(hdev, field->report);
483 break;
484 }
485 }
486
487 static void set_abs(struct input_dev *input, unsigned int code,
488 struct hid_field *field, int snratio)
489 {
490 int fmin = field->logical_minimum;
491 int fmax = field->logical_maximum;
492 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
493 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
494 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
495 }
496
497 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
498 struct mt_application *application)
499 {
500 struct mt_usages *usage;
501
502 usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
503 if (!usage)
504 return NULL;
505
506 /* set some defaults so we do not need to check for null pointers */
507 usage->x = DEFAULT_ZERO;
508 usage->y = DEFAULT_ZERO;
509 usage->cx = DEFAULT_ZERO;
510 usage->cy = DEFAULT_ZERO;
511 usage->p = DEFAULT_ZERO;
512 usage->w = DEFAULT_ZERO;
513 usage->h = DEFAULT_ZERO;
514 usage->a = DEFAULT_ZERO;
515 usage->contactid = DEFAULT_ZERO;
516 usage->tip_state = DEFAULT_FALSE;
517 usage->inrange_state = DEFAULT_FALSE;
518 usage->confidence_state = DEFAULT_TRUE;
519
520 list_add_tail(&usage->list, &application->mt_usages);
521
522 return usage;
523 }
524
525 static struct mt_application *mt_allocate_application(struct mt_device *td,
526 struct hid_report *report)
527 {
528 unsigned int application = report->application;
529 struct mt_application *mt_application;
530
531 mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
532 GFP_KERNEL);
533 if (!mt_application)
534 return NULL;
535
536 mt_application->application = application;
537 INIT_LIST_HEAD(&mt_application->mt_usages);
538
539 if (application == HID_DG_TOUCHSCREEN)
540 mt_application->mt_flags |= INPUT_MT_DIRECT;
541
542 /*
543 * Model touchscreens providing buttons as touchpads.
544 */
545 if (application == HID_DG_TOUCHPAD) {
546 mt_application->mt_flags |= INPUT_MT_POINTER;
547 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
548 }
549
550 mt_application->scantime = DEFAULT_ZERO;
551 mt_application->raw_cc = DEFAULT_ZERO;
552 mt_application->quirks = td->mtclass.quirks;
553 mt_application->report_id = report->id;
554
555 list_add_tail(&mt_application->list, &td->applications);
556
557 return mt_application;
558 }
559
560 static struct mt_application *mt_find_application(struct mt_device *td,
561 struct hid_report *report)
562 {
563 unsigned int application = report->application;
564 struct mt_application *tmp, *mt_application = NULL;
565
566 list_for_each_entry(tmp, &td->applications, list) {
567 if (application == tmp->application) {
568 if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
569 tmp->report_id == report->id) {
570 mt_application = tmp;
571 break;
572 }
573 }
574 }
575
576 if (!mt_application)
577 mt_application = mt_allocate_application(td, report);
578
579 return mt_application;
580 }
581
582 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
583 struct hid_report *report)
584 {
585 struct mt_report_data *rdata;
586 struct hid_field *field;
587 int r, n;
588
589 rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
590 if (!rdata)
591 return NULL;
592
593 rdata->report = report;
594 rdata->application = mt_find_application(td, report);
595
596 if (!rdata->application) {
597 devm_kfree(&td->hdev->dev, rdata);
598 return NULL;
599 }
600
601 for (r = 0; r < report->maxfield; r++) {
602 field = report->field[r];
603
604 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
605 continue;
606
607 for (n = 0; n < field->report_count; n++) {
608 if (field->usage[n].hid == HID_DG_CONTACTID)
609 rdata->is_mt_collection = true;
610 }
611 }
612
613 list_add_tail(&rdata->list, &td->reports);
614
615 return rdata;
616 }
617
618 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
619 struct hid_report *report)
620 {
621 struct mt_report_data *tmp, *rdata = NULL;
622
623 list_for_each_entry(tmp, &td->reports, list) {
624 if (report == tmp->report) {
625 rdata = tmp;
626 break;
627 }
628 }
629
630 if (!rdata)
631 rdata = mt_allocate_report_data(td, report);
632
633 return rdata;
634 }
635
636 static void mt_store_field(struct hid_device *hdev,
637 struct mt_application *application,
638 __s32 *value,
639 size_t offset)
640 {
641 struct mt_usages *usage;
642 __s32 **target;
643
644 if (list_empty(&application->mt_usages))
645 usage = mt_allocate_usage(hdev, application);
646 else
647 usage = list_last_entry(&application->mt_usages,
648 struct mt_usages,
649 list);
650
651 if (!usage)
652 return;
653
654 target = (__s32 **)((char *)usage + offset);
655
656 /* the value has already been filled, create a new slot */
657 if (*target != DEFAULT_TRUE &&
658 *target != DEFAULT_FALSE &&
659 *target != DEFAULT_ZERO) {
660 if (usage->contactid == DEFAULT_ZERO ||
661 usage->x == DEFAULT_ZERO ||
662 usage->y == DEFAULT_ZERO) {
663 hid_dbg(hdev,
664 "ignoring duplicate usage on incomplete");
665 return;
666 }
667 usage = mt_allocate_usage(hdev, application);
668 if (!usage)
669 return;
670
671 target = (__s32 **)((char *)usage + offset);
672 }
673
674 *target = value;
675 }
676
677 #define MT_STORE_FIELD(__name) \
678 mt_store_field(hdev, app, \
679 &field->value[usage->usage_index], \
680 offsetof(struct mt_usages, __name))
681
682 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
683 struct hid_field *field, struct hid_usage *usage,
684 unsigned long **bit, int *max, struct mt_application *app)
685 {
686 struct mt_device *td = hid_get_drvdata(hdev);
687 struct mt_class *cls = &td->mtclass;
688 int code;
689 struct hid_usage *prev_usage = NULL;
690
691 /*
692 * Model touchscreens providing buttons as touchpads.
693 */
694 if (field->application == HID_DG_TOUCHSCREEN &&
695 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
696 app->mt_flags |= INPUT_MT_POINTER;
697 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
698 }
699
700 /* count the buttons on touchpads */
701 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
702 app->buttons_count++;
703
704 if (usage->usage_index)
705 prev_usage = &field->usage[usage->usage_index - 1];
706
707 switch (usage->hid & HID_USAGE_PAGE) {
708
709 case HID_UP_GENDESK:
710 switch (usage->hid) {
711 case HID_GD_X:
712 if (prev_usage && (prev_usage->hid == usage->hid)) {
713 code = ABS_MT_TOOL_X;
714 MT_STORE_FIELD(cx);
715 } else {
716 code = ABS_MT_POSITION_X;
717 MT_STORE_FIELD(x);
718 }
719
720 set_abs(hi->input, code, field, cls->sn_move);
721
722 /*
723 * A system multi-axis that exports X and Y has a high
724 * chance of being used directly on a surface
725 */
726 if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
727 __set_bit(INPUT_PROP_DIRECT,
728 hi->input->propbit);
729 input_set_abs_params(hi->input,
730 ABS_MT_TOOL_TYPE,
731 MT_TOOL_DIAL,
732 MT_TOOL_DIAL, 0, 0);
733 }
734
735 return 1;
736 case HID_GD_Y:
737 if (prev_usage && (prev_usage->hid == usage->hid)) {
738 code = ABS_MT_TOOL_Y;
739 MT_STORE_FIELD(cy);
740 } else {
741 code = ABS_MT_POSITION_Y;
742 MT_STORE_FIELD(y);
743 }
744
745 set_abs(hi->input, code, field, cls->sn_move);
746
747 return 1;
748 }
749 return 0;
750
751 case HID_UP_DIGITIZER:
752 switch (usage->hid) {
753 case HID_DG_INRANGE:
754 if (app->quirks & MT_QUIRK_HOVERING) {
755 input_set_abs_params(hi->input,
756 ABS_MT_DISTANCE, 0, 1, 0, 0);
757 }
758 MT_STORE_FIELD(inrange_state);
759 return 1;
760 case HID_DG_CONFIDENCE:
761 if (cls->name == MT_CLS_WIN_8 &&
762 (field->application == HID_DG_TOUCHPAD ||
763 field->application == HID_DG_TOUCHSCREEN))
764 app->quirks |= MT_QUIRK_CONFIDENCE;
765
766 if (app->quirks & MT_QUIRK_CONFIDENCE)
767 input_set_abs_params(hi->input,
768 ABS_MT_TOOL_TYPE,
769 MT_TOOL_FINGER,
770 MT_TOOL_PALM, 0, 0);
771
772 MT_STORE_FIELD(confidence_state);
773 return 1;
774 case HID_DG_TIPSWITCH:
775 if (field->application != HID_GD_SYSTEM_MULTIAXIS)
776 input_set_capability(hi->input,
777 EV_KEY, BTN_TOUCH);
778 MT_STORE_FIELD(tip_state);
779 return 1;
780 case HID_DG_CONTACTID:
781 MT_STORE_FIELD(contactid);
782 app->touches_by_report++;
783 return 1;
784 case HID_DG_WIDTH:
785 if (!(app->quirks & MT_QUIRK_NO_AREA))
786 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
787 cls->sn_width);
788 MT_STORE_FIELD(w);
789 return 1;
790 case HID_DG_HEIGHT:
791 if (!(app->quirks & MT_QUIRK_NO_AREA)) {
792 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
793 cls->sn_height);
794
795 /*
796 * Only set ABS_MT_ORIENTATION if it is not
797 * already set by the HID_DG_AZIMUTH usage.
798 */
799 if (!test_bit(ABS_MT_ORIENTATION,
800 hi->input->absbit))
801 input_set_abs_params(hi->input,
802 ABS_MT_ORIENTATION, 0, 1, 0, 0);
803 }
804 MT_STORE_FIELD(h);
805 return 1;
806 case HID_DG_TIPPRESSURE:
807 set_abs(hi->input, ABS_MT_PRESSURE, field,
808 cls->sn_pressure);
809 MT_STORE_FIELD(p);
810 return 1;
811 case HID_DG_SCANTIME:
812 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
813 app->scantime = &field->value[usage->usage_index];
814 app->scantime_logical_max = field->logical_maximum;
815 return 1;
816 case HID_DG_CONTACTCOUNT:
817 app->have_contact_count = true;
818 app->raw_cc = &field->value[usage->usage_index];
819 return 1;
820 case HID_DG_AZIMUTH:
821 /*
822 * Azimuth has the range of [0, MAX) representing a full
823 * revolution. Set ABS_MT_ORIENTATION to a quarter of
824 * MAX according the definition of ABS_MT_ORIENTATION
825 */
826 input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
827 -field->logical_maximum / 4,
828 field->logical_maximum / 4,
829 cls->sn_move ?
830 field->logical_maximum / cls->sn_move : 0, 0);
831 MT_STORE_FIELD(a);
832 return 1;
833 case HID_DG_CONTACTMAX:
834 /* contact max are global to the report */
835 return -1;
836 case HID_DG_TOUCH:
837 /* Legacy devices use TIPSWITCH and not TOUCH.
838 * Let's just ignore this field. */
839 return -1;
840 }
841 /* let hid-input decide for the others */
842 return 0;
843
844 case HID_UP_BUTTON:
845 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
846 /*
847 * MS PTP spec says that external buttons left and right have
848 * usages 2 and 3.
849 */
850 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
851 field->application == HID_DG_TOUCHPAD &&
852 (usage->hid & HID_USAGE) > 1)
853 code--;
854
855 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
856 code = BTN_0 + ((usage->hid - 1) & HID_USAGE);
857
858 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
859 input_set_capability(hi->input, EV_KEY, code);
860 return 1;
861
862 case 0xff000000:
863 /* we do not want to map these: no input-oriented meaning */
864 return -1;
865 }
866
867 return 0;
868 }
869
870 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
871 struct mt_usages *slot,
872 struct input_dev *input)
873 {
874 __s32 quirks = app->quirks;
875
876 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
877 return *slot->contactid;
878
879 if (quirks & MT_QUIRK_CYPRESS)
880 return cypress_compute_slot(app, slot);
881
882 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
883 return app->num_received;
884
885 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
886 return *slot->contactid - 1;
887
888 return input_mt_get_slot_by_key(input, *slot->contactid);
889 }
890
891 static void mt_release_pending_palms(struct mt_device *td,
892 struct mt_application *app,
893 struct input_dev *input)
894 {
895 int slotnum;
896 bool need_sync = false;
897
898 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
899 clear_bit(slotnum, app->pending_palm_slots);
900
901 input_mt_slot(input, slotnum);
902 input_mt_report_slot_inactive(input);
903
904 need_sync = true;
905 }
906
907 if (need_sync) {
908 input_mt_sync_frame(input);
909 input_sync(input);
910 }
911 }
912
913 /*
914 * this function is called when a whole packet has been received and processed,
915 * so that it can decide what to send to the input layer.
916 */
917 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
918 struct input_dev *input)
919 {
920 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
921 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
922
923 input_mt_sync_frame(input);
924 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
925 input_sync(input);
926
927 mt_release_pending_palms(td, app, input);
928
929 app->num_received = 0;
930 app->left_button_state = 0;
931
932 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
933 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
934 else
935 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
936 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
937 }
938
939 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
940 {
941 long delta = value - app->prev_scantime;
942 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
943
944 app->jiffies = jiffies;
945
946 if (delta < 0)
947 delta += app->scantime_logical_max;
948
949 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
950 delta *= 100;
951
952 if (jdelta > MAX_TIMESTAMP_INTERVAL)
953 /* No data received for a while, resync the timestamp. */
954 return 0;
955 else
956 return app->timestamp + delta;
957 }
958
959 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
960 struct hid_usage *usage, __s32 value)
961 {
962 /* we will handle the hidinput part later, now remains hiddev */
963 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
964 hid->hiddev_hid_event(hid, field, usage, value);
965
966 return 1;
967 }
968
969 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
970 struct mt_application *app,
971 struct mt_usages *slot)
972 {
973 struct input_mt *mt = input->mt;
974 __s32 quirks = app->quirks;
975 bool valid = true;
976 bool confidence_state = true;
977 bool inrange_state = false;
978 int active;
979 int slotnum;
980 int tool = MT_TOOL_FINGER;
981
982 if (!slot)
983 return -EINVAL;
984
985 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
986 app->num_received >= app->num_expected)
987 return -EAGAIN;
988
989 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
990 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
991 valid = *slot->inrange_state;
992 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
993 valid = *slot->tip_state;
994 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
995 valid = *slot->confidence_state;
996
997 if (!valid)
998 return 0;
999 }
1000
1001 slotnum = mt_compute_slot(td, app, slot, input);
1002 if (slotnum < 0 || slotnum >= td->maxcontacts)
1003 return 0;
1004
1005 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1006 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1007
1008 if (input_mt_is_active(i_slot) &&
1009 input_mt_is_used(mt, i_slot))
1010 return -EAGAIN;
1011 }
1012
1013 if (quirks & MT_QUIRK_CONFIDENCE)
1014 confidence_state = *slot->confidence_state;
1015
1016 if (quirks & MT_QUIRK_HOVERING)
1017 inrange_state = *slot->inrange_state;
1018
1019 active = *slot->tip_state || inrange_state;
1020
1021 if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1022 tool = MT_TOOL_DIAL;
1023 else if (unlikely(!confidence_state)) {
1024 tool = MT_TOOL_PALM;
1025 if (!active && mt &&
1026 input_mt_is_active(&mt->slots[slotnum])) {
1027 /*
1028 * The non-confidence was reported for
1029 * previously valid contact that is also no
1030 * longer valid. We can't simply report
1031 * lift-off as userspace will not be aware
1032 * of non-confidence, so we need to split
1033 * it into 2 events: active MT_TOOL_PALM
1034 * and a separate liftoff.
1035 */
1036 active = true;
1037 set_bit(slotnum, app->pending_palm_slots);
1038 }
1039 }
1040
1041 input_mt_slot(input, slotnum);
1042 input_mt_report_slot_state(input, tool, active);
1043 if (active) {
1044 /* this finger is in proximity of the sensor */
1045 int wide = (*slot->w > *slot->h);
1046 int major = max(*slot->w, *slot->h);
1047 int minor = min(*slot->w, *slot->h);
1048 int orientation = wide;
1049 int max_azimuth;
1050 int azimuth;
1051
1052 if (slot->a != DEFAULT_ZERO) {
1053 /*
1054 * Azimuth is counter-clockwise and ranges from [0, MAX)
1055 * (a full revolution). Convert it to clockwise ranging
1056 * [-MAX/2, MAX/2].
1057 *
1058 * Note that ABS_MT_ORIENTATION require us to report
1059 * the limit of [-MAX/4, MAX/4], but the value can go
1060 * out of range to [-MAX/2, MAX/2] to report an upside
1061 * down ellipsis.
1062 */
1063 azimuth = *slot->a;
1064 max_azimuth = input_abs_get_max(input,
1065 ABS_MT_ORIENTATION);
1066 if (azimuth > max_azimuth * 2)
1067 azimuth -= max_azimuth * 4;
1068 orientation = -azimuth;
1069 }
1070
1071 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1072 /*
1073 * divided by two to match visual scale of touch
1074 * for devices with this quirk
1075 */
1076 major = major >> 1;
1077 minor = minor >> 1;
1078 }
1079
1080 input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
1081 input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
1082 input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
1083 input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy);
1084 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1085 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1086 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1087 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1088 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1089
1090 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1091 }
1092
1093 return 0;
1094 }
1095
1096 static void mt_process_mt_event(struct hid_device *hid,
1097 struct mt_application *app,
1098 struct hid_field *field,
1099 struct hid_usage *usage,
1100 __s32 value,
1101 bool first_packet)
1102 {
1103 __s32 quirks = app->quirks;
1104 struct input_dev *input = field->hidinput->input;
1105
1106 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1107 return;
1108
1109 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1110
1111 /*
1112 * For Win8 PTP touchpads we should only look at
1113 * non finger/touch events in the first_packet of a
1114 * (possible) multi-packet frame.
1115 */
1116 if (!first_packet)
1117 return;
1118
1119 /*
1120 * For Win8 PTP touchpads we map both the clickpad click
1121 * and any "external" left buttons to BTN_LEFT if a
1122 * device claims to have both we need to report 1 for
1123 * BTN_LEFT if either is pressed, so we or all values
1124 * together and report the result in mt_sync_frame().
1125 */
1126 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1127 app->left_button_state |= value;
1128 return;
1129 }
1130 }
1131
1132 input_event(input, usage->type, usage->code, value);
1133 }
1134
1135 static void mt_touch_report(struct hid_device *hid,
1136 struct mt_report_data *rdata)
1137 {
1138 struct mt_device *td = hid_get_drvdata(hid);
1139 struct hid_report *report = rdata->report;
1140 struct mt_application *app = rdata->application;
1141 struct hid_field *field;
1142 struct input_dev *input;
1143 struct mt_usages *slot;
1144 bool first_packet;
1145 unsigned count;
1146 int r, n;
1147 int scantime = 0;
1148 int contact_count = -1;
1149
1150 /* sticky fingers release in progress, abort */
1151 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1152 return;
1153
1154 scantime = *app->scantime;
1155 app->timestamp = mt_compute_timestamp(app, scantime);
1156 if (app->raw_cc != DEFAULT_ZERO)
1157 contact_count = *app->raw_cc;
1158
1159 /*
1160 * Includes multi-packet support where subsequent
1161 * packets are sent with zero contactcount.
1162 */
1163 if (contact_count >= 0) {
1164 /*
1165 * For Win8 PTPs the first packet (td->num_received == 0) may
1166 * have a contactcount of 0 if there only is a button event.
1167 * We double check that this is not a continuation packet
1168 * of a possible multi-packet frame be checking that the
1169 * timestamp has changed.
1170 */
1171 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1172 app->num_received == 0 &&
1173 app->prev_scantime != scantime)
1174 app->num_expected = contact_count;
1175 /* A non 0 contact count always indicates a first packet */
1176 else if (contact_count)
1177 app->num_expected = contact_count;
1178 }
1179 app->prev_scantime = scantime;
1180
1181 first_packet = app->num_received == 0;
1182
1183 input = report->field[0]->hidinput->input;
1184
1185 list_for_each_entry(slot, &app->mt_usages, list) {
1186 if (!mt_process_slot(td, input, app, slot))
1187 app->num_received++;
1188 }
1189
1190 for (r = 0; r < report->maxfield; r++) {
1191 field = report->field[r];
1192 count = field->report_count;
1193
1194 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1195 continue;
1196
1197 for (n = 0; n < count; n++)
1198 mt_process_mt_event(hid, app, field,
1199 &field->usage[n], field->value[n],
1200 first_packet);
1201 }
1202
1203 if (app->num_received >= app->num_expected)
1204 mt_sync_frame(td, app, input);
1205
1206 /*
1207 * Windows 8 specs says 2 things:
1208 * - once a contact has been reported, it has to be reported in each
1209 * subsequent report
1210 * - the report rate when fingers are present has to be at least
1211 * the refresh rate of the screen, 60 or 120 Hz
1212 *
1213 * I interprete this that the specification forces a report rate of
1214 * at least 60 Hz for a touchscreen to be certified.
1215 * Which means that if we do not get a report whithin 16 ms, either
1216 * something wrong happens, either the touchscreen forgets to send
1217 * a release. Taking a reasonable margin allows to remove issues
1218 * with USB communication or the load of the machine.
1219 *
1220 * Given that Win 8 devices are forced to send a release, this will
1221 * only affect laggish machines and the ones that have a firmware
1222 * defect.
1223 */
1224 if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1225 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1226 mod_timer(&td->release_timer,
1227 jiffies + msecs_to_jiffies(100));
1228 else
1229 del_timer(&td->release_timer);
1230 }
1231
1232 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1233 }
1234
1235 static int mt_touch_input_configured(struct hid_device *hdev,
1236 struct hid_input *hi,
1237 struct mt_application *app)
1238 {
1239 struct mt_device *td = hid_get_drvdata(hdev);
1240 struct mt_class *cls = &td->mtclass;
1241 struct input_dev *input = hi->input;
1242 int ret;
1243
1244 if (!td->maxcontacts)
1245 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1246
1247 mt_post_parse(td, app);
1248 if (td->serial_maybe)
1249 mt_post_parse_default_settings(td, app);
1250
1251 if (cls->is_indirect)
1252 app->mt_flags |= INPUT_MT_POINTER;
1253
1254 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1255 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1256
1257 /* check for clickpads */
1258 if ((app->mt_flags & INPUT_MT_POINTER) &&
1259 (app->buttons_count == 1))
1260 td->is_buttonpad = true;
1261
1262 if (td->is_buttonpad)
1263 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1264
1265 app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1266 BITS_TO_LONGS(td->maxcontacts),
1267 sizeof(long),
1268 GFP_KERNEL);
1269 if (!app->pending_palm_slots)
1270 return -ENOMEM;
1271
1272 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1273 if (ret)
1274 return ret;
1275
1276 app->mt_flags = 0;
1277 return 0;
1278 }
1279
1280 #define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1281 max, EV_KEY, (c))
1282 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1283 struct hid_field *field, struct hid_usage *usage,
1284 unsigned long **bit, int *max)
1285 {
1286 struct mt_device *td = hid_get_drvdata(hdev);
1287 struct mt_application *application;
1288 struct mt_report_data *rdata;
1289
1290 rdata = mt_find_report_data(td, field->report);
1291 if (!rdata) {
1292 hid_err(hdev, "failed to allocate data for report\n");
1293 return 0;
1294 }
1295
1296 application = rdata->application;
1297
1298 /*
1299 * If mtclass.export_all_inputs is not set, only map fields from
1300 * TouchScreen or TouchPad collections. We need to ignore fields
1301 * that belong to other collections such as Mouse that might have
1302 * the same GenericDesktop usages.
1303 */
1304 if (!td->mtclass.export_all_inputs &&
1305 field->application != HID_DG_TOUCHSCREEN &&
1306 field->application != HID_DG_PEN &&
1307 field->application != HID_DG_TOUCHPAD &&
1308 field->application != HID_GD_KEYBOARD &&
1309 field->application != HID_GD_SYSTEM_CONTROL &&
1310 field->application != HID_CP_CONSUMER_CONTROL &&
1311 field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1312 field->application != HID_GD_SYSTEM_MULTIAXIS &&
1313 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1314 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1315 return -1;
1316
1317 /*
1318 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1319 * touchpad report descriptor. We need to treat these as an array to
1320 * map usages to input keys.
1321 */
1322 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1323 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1324 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1325 set_bit(EV_REP, hi->input->evbit);
1326 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1327 field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1328 switch (usage->hid & HID_USAGE) {
1329 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
1330 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
1331 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
1332 case 0x6b: mt_map_key_clear(KEY_F21); break;
1333 case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
1334 default:
1335 return -1;
1336 }
1337 return 1;
1338 }
1339
1340 if (rdata->is_mt_collection)
1341 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1342 application);
1343
1344 /*
1345 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1346 * for the stylus. Overwrite the hid_input application
1347 */
1348 if (field->physical == HID_DG_STYLUS)
1349 hi->application = HID_DG_STYLUS;
1350
1351 /* let hid-core decide for the others */
1352 return 0;
1353 }
1354
1355 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1356 struct hid_field *field, struct hid_usage *usage,
1357 unsigned long **bit, int *max)
1358 {
1359 struct mt_device *td = hid_get_drvdata(hdev);
1360 struct mt_report_data *rdata;
1361
1362 rdata = mt_find_report_data(td, field->report);
1363 if (rdata && rdata->is_mt_collection) {
1364 /* We own these mappings, tell hid-input to ignore them */
1365 return -1;
1366 }
1367
1368 /* let hid-core decide for the others */
1369 return 0;
1370 }
1371
1372 static int mt_event(struct hid_device *hid, struct hid_field *field,
1373 struct hid_usage *usage, __s32 value)
1374 {
1375 struct mt_device *td = hid_get_drvdata(hid);
1376 struct mt_report_data *rdata;
1377
1378 rdata = mt_find_report_data(td, field->report);
1379 if (rdata && rdata->is_mt_collection)
1380 return mt_touch_event(hid, field, usage, value);
1381
1382 return 0;
1383 }
1384
1385 static void mt_report(struct hid_device *hid, struct hid_report *report)
1386 {
1387 struct mt_device *td = hid_get_drvdata(hid);
1388 struct hid_field *field = report->field[0];
1389 struct mt_report_data *rdata;
1390
1391 if (!(hid->claimed & HID_CLAIMED_INPUT))
1392 return;
1393
1394 rdata = mt_find_report_data(td, report);
1395 if (rdata && rdata->is_mt_collection)
1396 return mt_touch_report(hid, rdata);
1397
1398 if (field && field->hidinput && field->hidinput->input)
1399 input_sync(field->hidinput->input);
1400 }
1401
1402 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1403 struct hid_field *field,
1404 struct hid_usage *usage,
1405 enum latency_mode latency,
1406 bool surface_switch,
1407 bool button_switch,
1408 bool *inputmode_found)
1409 {
1410 struct mt_device *td = hid_get_drvdata(hdev);
1411 struct mt_class *cls = &td->mtclass;
1412 struct hid_report *report = field->report;
1413 unsigned int index = usage->usage_index;
1414 char *buf;
1415 u32 report_len;
1416 int max;
1417
1418 switch (usage->hid) {
1419 case HID_DG_INPUTMODE:
1420 /*
1421 * Some elan panels wrongly declare 2 input mode features,
1422 * and silently ignore when we set the value in the second
1423 * field. Skip the second feature and hope for the best.
1424 */
1425 if (*inputmode_found)
1426 return false;
1427
1428 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1429 report_len = hid_report_len(report);
1430 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1431 if (!buf) {
1432 hid_err(hdev,
1433 "failed to allocate buffer for report\n");
1434 return false;
1435 }
1436 hid_hw_raw_request(hdev, report->id, buf, report_len,
1437 HID_FEATURE_REPORT,
1438 HID_REQ_GET_REPORT);
1439 kfree(buf);
1440 }
1441
1442 field->value[index] = td->inputmode_value;
1443 *inputmode_found = true;
1444 return true;
1445
1446 case HID_DG_CONTACTMAX:
1447 if (cls->maxcontacts) {
1448 max = min_t(int, field->logical_maximum,
1449 cls->maxcontacts);
1450 if (field->value[index] != max) {
1451 field->value[index] = max;
1452 return true;
1453 }
1454 }
1455 break;
1456
1457 case HID_DG_LATENCYMODE:
1458 field->value[index] = latency;
1459 return true;
1460
1461 case HID_DG_SURFACESWITCH:
1462 field->value[index] = surface_switch;
1463 return true;
1464
1465 case HID_DG_BUTTONSWITCH:
1466 field->value[index] = button_switch;
1467 return true;
1468 }
1469
1470 return false; /* no need to update the report */
1471 }
1472
1473 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1474 bool surface_switch, bool button_switch)
1475 {
1476 struct hid_report_enum *rep_enum;
1477 struct hid_report *rep;
1478 struct hid_usage *usage;
1479 int i, j;
1480 bool update_report;
1481 bool inputmode_found = false;
1482
1483 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1484 list_for_each_entry(rep, &rep_enum->report_list, list) {
1485 update_report = false;
1486
1487 for (i = 0; i < rep->maxfield; i++) {
1488 /* Ignore if report count is out of bounds. */
1489 if (rep->field[i]->report_count < 1)
1490 continue;
1491
1492 for (j = 0; j < rep->field[i]->maxusage; j++) {
1493 usage = &rep->field[i]->usage[j];
1494
1495 if (mt_need_to_apply_feature(hdev,
1496 rep->field[i],
1497 usage,
1498 latency,
1499 surface_switch,
1500 button_switch,
1501 &inputmode_found))
1502 update_report = true;
1503 }
1504 }
1505
1506 if (update_report)
1507 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1508 }
1509 }
1510
1511 static void mt_post_parse_default_settings(struct mt_device *td,
1512 struct mt_application *app)
1513 {
1514 __s32 quirks = app->quirks;
1515
1516 /* unknown serial device needs special quirks */
1517 if (list_is_singular(&app->mt_usages)) {
1518 quirks |= MT_QUIRK_ALWAYS_VALID;
1519 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1520 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1521 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1522 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1523 }
1524
1525 app->quirks = quirks;
1526 }
1527
1528 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1529 {
1530 if (!app->have_contact_count)
1531 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1532 }
1533
1534 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1535 {
1536 struct mt_device *td = hid_get_drvdata(hdev);
1537 char *name;
1538 const char *suffix = NULL;
1539 struct mt_report_data *rdata;
1540 struct mt_application *mt_application = NULL;
1541 struct hid_report *report;
1542 int ret;
1543
1544 list_for_each_entry(report, &hi->reports, hidinput_list) {
1545 rdata = mt_find_report_data(td, report);
1546 if (!rdata) {
1547 hid_err(hdev, "failed to allocate data for report\n");
1548 return -ENOMEM;
1549 }
1550
1551 mt_application = rdata->application;
1552
1553 if (rdata->is_mt_collection) {
1554 ret = mt_touch_input_configured(hdev, hi,
1555 mt_application);
1556 if (ret)
1557 return ret;
1558 }
1559 }
1560
1561 switch (hi->application) {
1562 case HID_GD_KEYBOARD:
1563 case HID_GD_KEYPAD:
1564 case HID_GD_MOUSE:
1565 case HID_DG_TOUCHPAD:
1566 case HID_GD_SYSTEM_CONTROL:
1567 case HID_CP_CONSUMER_CONTROL:
1568 case HID_GD_WIRELESS_RADIO_CTLS:
1569 case HID_GD_SYSTEM_MULTIAXIS:
1570 /* already handled by hid core */
1571 break;
1572 case HID_DG_TOUCHSCREEN:
1573 /* we do not set suffix = "Touchscreen" */
1574 hi->input->name = hdev->name;
1575 break;
1576 case HID_DG_STYLUS:
1577 /* force BTN_STYLUS to allow tablet matching in udev */
1578 __set_bit(BTN_STYLUS, hi->input->keybit);
1579 break;
1580 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1581 suffix = "Custom Media Keys";
1582 break;
1583 case HID_DG_PEN:
1584 suffix = "Stylus";
1585 break;
1586 default:
1587 suffix = "UNKNOWN";
1588 break;
1589 }
1590
1591 if (suffix) {
1592 name = devm_kzalloc(&hi->input->dev,
1593 strlen(hdev->name) + strlen(suffix) + 2,
1594 GFP_KERNEL);
1595 if (name) {
1596 sprintf(name, "%s %s", hdev->name, suffix);
1597 hi->input->name = name;
1598 }
1599 }
1600
1601 return 0;
1602 }
1603
1604 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1605 {
1606 if (field->usage[0].hid != usage ||
1607 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1608 return;
1609
1610 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1611 field->flags |= HID_MAIN_ITEM_VARIABLE;
1612 }
1613
1614 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1615 {
1616 struct hid_report *report;
1617 int i;
1618
1619 list_for_each_entry(report,
1620 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1621 list) {
1622
1623 if (!report->maxfield)
1624 continue;
1625
1626 for (i = 0; i < report->maxfield; i++)
1627 if (report->field[i]->maxusage >= 1)
1628 mt_fix_const_field(report->field[i], usage);
1629 }
1630 }
1631
1632 static void mt_release_contacts(struct hid_device *hid)
1633 {
1634 struct hid_input *hidinput;
1635 struct mt_application *application;
1636 struct mt_device *td = hid_get_drvdata(hid);
1637
1638 list_for_each_entry(hidinput, &hid->inputs, list) {
1639 struct input_dev *input_dev = hidinput->input;
1640 struct input_mt *mt = input_dev->mt;
1641 int i;
1642
1643 if (mt) {
1644 for (i = 0; i < mt->num_slots; i++) {
1645 input_mt_slot(input_dev, i);
1646 input_mt_report_slot_inactive(input_dev);
1647 }
1648 input_mt_sync_frame(input_dev);
1649 input_sync(input_dev);
1650 }
1651 }
1652
1653 list_for_each_entry(application, &td->applications, list) {
1654 application->num_received = 0;
1655 }
1656 }
1657
1658 static void mt_expired_timeout(struct timer_list *t)
1659 {
1660 struct mt_device *td = from_timer(td, t, release_timer);
1661 struct hid_device *hdev = td->hdev;
1662
1663 /*
1664 * An input report came in just before we release the sticky fingers,
1665 * it will take care of the sticky fingers.
1666 */
1667 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1668 return;
1669 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1670 mt_release_contacts(hdev);
1671 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1672 }
1673
1674 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1675 {
1676 int ret, i;
1677 struct mt_device *td;
1678 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1679
1680 for (i = 0; mt_classes[i].name ; i++) {
1681 if (id->driver_data == mt_classes[i].name) {
1682 mtclass = &(mt_classes[i]);
1683 break;
1684 }
1685 }
1686
1687 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1688 if (!td) {
1689 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1690 return -ENOMEM;
1691 }
1692 td->hdev = hdev;
1693 td->mtclass = *mtclass;
1694 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1695 hid_set_drvdata(hdev, td);
1696
1697 INIT_LIST_HEAD(&td->applications);
1698 INIT_LIST_HEAD(&td->reports);
1699
1700 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1701 td->serial_maybe = true;
1702
1703 /* This allows the driver to correctly support devices
1704 * that emit events over several HID messages.
1705 */
1706 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1707
1708 /*
1709 * This allows the driver to handle different input sensors
1710 * that emits events through different applications on the same HID
1711 * device.
1712 */
1713 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1714
1715 if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1716 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1717
1718 if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) {
1719 hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP;
1720 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1721 }
1722
1723 timer_setup(&td->release_timer, mt_expired_timeout, 0);
1724
1725 ret = hid_parse(hdev);
1726 if (ret != 0)
1727 return ret;
1728
1729 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1730 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1731
1732 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1733 if (ret)
1734 return ret;
1735
1736 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1737 if (ret)
1738 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1739 hdev->name);
1740
1741 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1742
1743 return 0;
1744 }
1745
1746 #ifdef CONFIG_PM
1747 static int mt_reset_resume(struct hid_device *hdev)
1748 {
1749 mt_release_contacts(hdev);
1750 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1751 return 0;
1752 }
1753
1754 static int mt_resume(struct hid_device *hdev)
1755 {
1756 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1757 * It should be safe to send it to other devices too.
1758 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1759
1760 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1761
1762 return 0;
1763 }
1764 #endif
1765
1766 static void mt_remove(struct hid_device *hdev)
1767 {
1768 struct mt_device *td = hid_get_drvdata(hdev);
1769
1770 del_timer_sync(&td->release_timer);
1771
1772 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1773 hid_hw_stop(hdev);
1774 }
1775
1776 /*
1777 * This list contains only:
1778 * - VID/PID of products not working with the default multitouch handling
1779 * - 2 generic rules.
1780 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1781 */
1782 static const struct hid_device_id mt_devices[] = {
1783
1784 /* 3M panels */
1785 { .driver_data = MT_CLS_3M,
1786 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1787 USB_DEVICE_ID_3M1968) },
1788 { .driver_data = MT_CLS_3M,
1789 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1790 USB_DEVICE_ID_3M2256) },
1791 { .driver_data = MT_CLS_3M,
1792 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1793 USB_DEVICE_ID_3M3266) },
1794
1795 /* Anton devices */
1796 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1797 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1798 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1799
1800 /* Asus T304UA */
1801 { .driver_data = MT_CLS_ASUS,
1802 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1803 USB_VENDOR_ID_ASUSTEK,
1804 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1805
1806 /* Atmel panels */
1807 { .driver_data = MT_CLS_SERIAL,
1808 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1809 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1810
1811 /* Baanto multitouch devices */
1812 { .driver_data = MT_CLS_NSMU,
1813 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1814 USB_DEVICE_ID_BAANTO_MT_190W2) },
1815
1816 /* Cando panels */
1817 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1818 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1819 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1820 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1821 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1822 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1823
1824 /* Chunghwa Telecom touch panels */
1825 { .driver_data = MT_CLS_NSMU,
1826 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1827 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1828
1829 /* CJTouch panels */
1830 { .driver_data = MT_CLS_NSMU,
1831 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1832 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1833 { .driver_data = MT_CLS_NSMU,
1834 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1835 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1836
1837 /* CVTouch panels */
1838 { .driver_data = MT_CLS_NSMU,
1839 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1840 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1841
1842 /* eGalax devices (resistive) */
1843 { .driver_data = MT_CLS_EGALAX,
1844 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1845 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1846 { .driver_data = MT_CLS_EGALAX,
1847 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1848 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1849
1850 /* eGalax devices (capacitive) */
1851 { .driver_data = MT_CLS_EGALAX_SERIAL,
1852 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1853 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1854 { .driver_data = MT_CLS_EGALAX,
1855 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1856 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1857 { .driver_data = MT_CLS_EGALAX_SERIAL,
1858 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1859 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1860 { .driver_data = MT_CLS_EGALAX_SERIAL,
1861 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1862 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1863 { .driver_data = MT_CLS_EGALAX_SERIAL,
1864 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1865 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1866 { .driver_data = MT_CLS_EGALAX_SERIAL,
1867 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1868 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1869 { .driver_data = MT_CLS_EGALAX,
1870 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1871 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1872 { .driver_data = MT_CLS_EGALAX,
1873 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1874 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1875 { .driver_data = MT_CLS_EGALAX_SERIAL,
1876 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1877 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1878 { .driver_data = MT_CLS_EGALAX,
1879 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1880 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1881 { .driver_data = MT_CLS_EGALAX,
1882 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1883 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1884 { .driver_data = MT_CLS_EGALAX,
1885 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1886 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1887 { .driver_data = MT_CLS_EGALAX,
1888 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1889 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1890 { .driver_data = MT_CLS_EGALAX_SERIAL,
1891 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1892 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1893 { .driver_data = MT_CLS_EGALAX_SERIAL,
1894 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1895 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1896 { .driver_data = MT_CLS_EGALAX_SERIAL,
1897 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1898 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1899 { .driver_data = MT_CLS_EGALAX,
1900 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1901 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
1902
1903 /* Elan devices */
1904 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1905 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1906 USB_VENDOR_ID_ELAN, 0x313a) },
1907
1908 /* Elitegroup panel */
1909 { .driver_data = MT_CLS_SERIAL,
1910 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1911 USB_DEVICE_ID_ELITEGROUP_05D8) },
1912
1913 /* Flatfrog Panels */
1914 { .driver_data = MT_CLS_FLATFROG,
1915 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1916 USB_DEVICE_ID_MULTITOUCH_3200) },
1917
1918 /* FocalTech Panels */
1919 { .driver_data = MT_CLS_SERIAL,
1920 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1921 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1922
1923 /* GeneralTouch panel */
1924 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1925 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1926 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1927 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1928 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1929 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1930 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1931 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1932 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1933 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1934 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1935 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1936 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1937 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1938 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1939 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1940 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1941 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1942 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1943 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1944 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1945
1946 /* Gametel game controller */
1947 { .driver_data = MT_CLS_NSMU,
1948 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1949 USB_DEVICE_ID_GAMETEL_MT_MODE) },
1950
1951 /* GoodTouch panels */
1952 { .driver_data = MT_CLS_NSMU,
1953 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1954 USB_DEVICE_ID_GOODTOUCH_000f) },
1955
1956 /* Hanvon panels */
1957 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1958 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1959 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1960
1961 /* Ilitek dual touch panel */
1962 { .driver_data = MT_CLS_NSMU,
1963 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1964 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1965
1966 /* LG Melfas panel */
1967 { .driver_data = MT_CLS_LG,
1968 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1969 USB_DEVICE_ID_LG_MELFAS_MT) },
1970 { .driver_data = MT_CLS_LG,
1971 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
1972 USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
1973
1974 /* MosArt panels */
1975 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1976 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1977 USB_DEVICE_ID_ASUS_T91MT)},
1978 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1979 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1980 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1981 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1982 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1983 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1984
1985 /* Novatek Panel */
1986 { .driver_data = MT_CLS_NSMU,
1987 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1988 USB_DEVICE_ID_NOVATEK_PCT) },
1989
1990 /* Ntrig Panel */
1991 { .driver_data = MT_CLS_NSMU,
1992 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1993 USB_VENDOR_ID_NTRIG, 0x1b05) },
1994
1995 /* Panasonic panels */
1996 { .driver_data = MT_CLS_PANASONIC,
1997 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1998 USB_DEVICE_ID_PANABOARD_UBT780) },
1999 { .driver_data = MT_CLS_PANASONIC,
2000 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2001 USB_DEVICE_ID_PANABOARD_UBT880) },
2002
2003 /* PixArt optical touch screen */
2004 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2005 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2006 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2007 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2008 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2009 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2010 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2011 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2012 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2013
2014 /* PixCir-based panels */
2015 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2016 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2017 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2018
2019 /* Quanta-based panels */
2020 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2021 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2022 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2023
2024 /* Razer touchpads */
2025 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2026 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2027 USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2028
2029 /* Smart Tech panels */
2030 { .driver_data = MT_CLS_SMART_TECH,
2031 MT_USB_DEVICE(0x0b8c, 0x0092)},
2032
2033 /* Stantum panels */
2034 { .driver_data = MT_CLS_CONFIDENCE,
2035 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2036 USB_DEVICE_ID_MTP_STM)},
2037
2038 /* Synaptics devices */
2039 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2040 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2041 USB_VENDOR_ID_SYNAPTICS, 0xce08) },
2042
2043 /* TopSeed panels */
2044 { .driver_data = MT_CLS_TOPSEED,
2045 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2046 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2047
2048 /* Touch International panels */
2049 { .driver_data = MT_CLS_NSMU,
2050 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2051 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2052
2053 /* Unitec panels */
2054 { .driver_data = MT_CLS_NSMU,
2055 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2056 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2057 { .driver_data = MT_CLS_NSMU,
2058 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2059 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2060
2061 /* VTL panels */
2062 { .driver_data = MT_CLS_VTL,
2063 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2064 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2065
2066 /* Wistron panels */
2067 { .driver_data = MT_CLS_NSMU,
2068 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2069 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2070
2071 /* XAT */
2072 { .driver_data = MT_CLS_NSMU,
2073 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2074 USB_DEVICE_ID_XAT_CSR) },
2075
2076 /* Xiroku */
2077 { .driver_data = MT_CLS_NSMU,
2078 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2079 USB_DEVICE_ID_XIROKU_SPX) },
2080 { .driver_data = MT_CLS_NSMU,
2081 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2082 USB_DEVICE_ID_XIROKU_MPX) },
2083 { .driver_data = MT_CLS_NSMU,
2084 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2085 USB_DEVICE_ID_XIROKU_CSR) },
2086 { .driver_data = MT_CLS_NSMU,
2087 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2088 USB_DEVICE_ID_XIROKU_SPX1) },
2089 { .driver_data = MT_CLS_NSMU,
2090 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2091 USB_DEVICE_ID_XIROKU_MPX1) },
2092 { .driver_data = MT_CLS_NSMU,
2093 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2094 USB_DEVICE_ID_XIROKU_CSR1) },
2095 { .driver_data = MT_CLS_NSMU,
2096 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2097 USB_DEVICE_ID_XIROKU_SPX2) },
2098 { .driver_data = MT_CLS_NSMU,
2099 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2100 USB_DEVICE_ID_XIROKU_MPX2) },
2101 { .driver_data = MT_CLS_NSMU,
2102 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2103 USB_DEVICE_ID_XIROKU_CSR2) },
2104
2105 /* Google MT devices */
2106 { .driver_data = MT_CLS_GOOGLE,
2107 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2108 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2109
2110 /* Generic MT device */
2111 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2112
2113 /* Generic Win 8 certified MT device */
2114 { .driver_data = MT_CLS_WIN_8,
2115 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2116 HID_ANY_ID, HID_ANY_ID) },
2117 { }
2118 };
2119 MODULE_DEVICE_TABLE(hid, mt_devices);
2120
2121 static const struct hid_usage_id mt_grabbed_usages[] = {
2122 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2123 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2124 };
2125
2126 static struct hid_driver mt_driver = {
2127 .name = "hid-multitouch",
2128 .id_table = mt_devices,
2129 .probe = mt_probe,
2130 .remove = mt_remove,
2131 .input_mapping = mt_input_mapping,
2132 .input_mapped = mt_input_mapped,
2133 .input_configured = mt_input_configured,
2134 .feature_mapping = mt_feature_mapping,
2135 .usage_table = mt_grabbed_usages,
2136 .event = mt_event,
2137 .report = mt_report,
2138 #ifdef CONFIG_PM
2139 .reset_resume = mt_reset_resume,
2140 .resume = mt_resume,
2141 #endif
2142 };
2143 module_hid_driver(mt_driver);
Linux with added FPC-III support