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 test suite in hid-tools[1].
32 * Please run these regression tests before patching this module so that
33 * your patch won't break existing known devices.
34 *
35 * [1] https://gitlab.freedesktop.org/libevdev/hid-tools
36 */
37
38 #include <linux/device.h>
39 #include <linux/hid.h>
40 #include <linux/module.h>
41 #include <linux/slab.h>
42 #include <linux/input/mt.h>
43 #include <linux/jiffies.h>
44 #include <linux/string.h>
45 #include <linux/timer.h>
46
47
48 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
49 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
50 MODULE_DESCRIPTION("HID multitouch panels");
51 MODULE_LICENSE("GPL");
52
53 #include "hid-ids.h"
54
55 /* quirks to control the device */
56 #define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0)
57 #define MT_QUIRK_SLOT_IS_CONTACTID BIT(1)
58 #define MT_QUIRK_CYPRESS BIT(2)
59 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER BIT(3)
60 #define MT_QUIRK_ALWAYS_VALID BIT(4)
61 #define MT_QUIRK_VALID_IS_INRANGE BIT(5)
62 #define MT_QUIRK_VALID_IS_CONFIDENCE BIT(6)
63 #define MT_QUIRK_CONFIDENCE BIT(7)
64 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE BIT(8)
65 #define MT_QUIRK_NO_AREA BIT(9)
66 #define MT_QUIRK_IGNORE_DUPLICATES BIT(10)
67 #define MT_QUIRK_HOVERING BIT(11)
68 #define MT_QUIRK_CONTACT_CNT_ACCURATE BIT(12)
69 #define MT_QUIRK_FORCE_GET_FEATURE BIT(13)
70 #define MT_QUIRK_FIX_CONST_CONTACT_ID BIT(14)
71 #define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15)
72 #define MT_QUIRK_STICKY_FINGERS BIT(16)
73 #define MT_QUIRK_ASUS_CUSTOM_UP BIT(17)
74 #define MT_QUIRK_WIN8_PTP_BUTTONS BIT(18)
75
76 #define MT_INPUTMODE_TOUCHSCREEN 0x02
77 #define MT_INPUTMODE_TOUCHPAD 0x03
78
79 #define MT_BUTTONTYPE_CLICKPAD 0
80
81 enum 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
90 static const bool mtrue = true; /* default for true */
91 static const bool mfalse; /* default for false */
92 static 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
98 struct 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
107 struct mt_application {
108 struct list_head list;
109 unsigned int application;
110 struct list_head mt_usages; /* mt usages list */
111
112 __s32 quirks;
113
114 __s32 *scantime; /* scantime reported */
115 __s32 scantime_logical_max; /* max value for raw scantime */
116
117 __s32 *raw_cc; /* contact count in the report */
118 int left_button_state; /* left button state */
119 unsigned int mt_flags; /* flags to pass to input-mt */
120
121 unsigned long *pending_palm_slots; /* slots where we reported palm
122 * and need to release */
123
124 __u8 num_received; /* how many contacts we received */
125 __u8 num_expected; /* expected last contact index */
126 __u8 buttons_count; /* number of physical buttons per touchpad */
127 __u8 touches_by_report; /* how many touches are present in one report:
128 * 1 means we should use a serial protocol
129 * > 1 means hybrid (multitouch) protocol
130 */
131
132 __s32 dev_time; /* the scan time provided by the device */
133 unsigned long jiffies; /* the frame's jiffies */
134 int timestamp; /* the timestamp to be sent */
135 int prev_scantime; /* scantime reported previously */
136
137 bool have_contact_count;
138 };
139
140 struct mt_class {
141 __s32 name; /* MT_CLS */
142 __s32 quirks;
143 __s32 sn_move; /* Signal/noise ratio for move events */
144 __s32 sn_width; /* Signal/noise ratio for width events */
145 __s32 sn_height; /* Signal/noise ratio for height events */
146 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
147 __u8 maxcontacts;
148 bool is_indirect; /* true for touchpads */
149 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
150 };
151
152 struct mt_report_data {
153 struct list_head list;
154 struct hid_report *report;
155 struct mt_application *application;
156 bool is_mt_collection;
157 };
158
159 struct mt_device {
160 struct mt_class mtclass; /* our mt device class */
161 struct timer_list release_timer; /* to release sticky fingers */
162 struct hid_device *hdev; /* hid_device we're attached to */
163 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
164 __u8 inputmode_value; /* InputMode HID feature value */
165 __u8 maxcontacts;
166 bool is_buttonpad; /* is this device a button pad? */
167 bool serial_maybe; /* need to check for serial protocol */
168
169 struct list_head applications;
170 struct list_head reports;
171 };
172
173 static void mt_post_parse_default_settings(struct mt_device *td,
174 struct mt_application *app);
175 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
176
177 /* classes of device behavior */
178 #define MT_CLS_DEFAULT 0x0001
179
180 #define MT_CLS_SERIAL 0x0002
181 #define MT_CLS_CONFIDENCE 0x0003
182 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
183 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
184 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
185 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
186 /* reserved 0x0008 */
187 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
188 #define MT_CLS_NSMU 0x000a
189 /* reserved 0x0010 */
190 /* reserved 0x0011 */
191 #define MT_CLS_WIN_8 0x0012
192 #define MT_CLS_EXPORT_ALL_INPUTS 0x0013
193 #define MT_CLS_WIN_8_DUAL 0x0014
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
211 #define MT_DEFAULT_MAXCONTACT 10
212 #define MT_MAX_MAXCONTACT 250
213
214 /*
215 * Resync device and local timestamps after that many microseconds without
216 * receiving data.
217 */
218 #define MAX_TIMESTAMP_INTERVAL 1000000
219
220 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
221 #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
222
223 /*
224 * these device-dependent functions determine what slot corresponds
225 * to a valid contact that was just read.
226 */
227
cypress_compute_slot(struct mt_application * application,struct mt_usages * slot)228 static int cypress_compute_slot(struct mt_application *application,
229 struct mt_usages *slot)
230 {
231 if (*slot->contactid != 0 || application->num_received == 0)
232 return *slot->contactid;
233 else
234 return -1;
235 }
236
237 static const struct mt_class mt_classes[] = {
238 { .name = MT_CLS_DEFAULT,
239 .quirks = MT_QUIRK_ALWAYS_VALID |
240 MT_QUIRK_CONTACT_CNT_ACCURATE },
241 { .name = MT_CLS_NSMU,
242 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
243 { .name = MT_CLS_SERIAL,
244 .quirks = MT_QUIRK_ALWAYS_VALID},
245 { .name = MT_CLS_CONFIDENCE,
246 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
247 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
248 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
249 MT_QUIRK_SLOT_IS_CONTACTID },
250 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
251 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
252 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
253 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
254 .quirks = MT_QUIRK_VALID_IS_INRANGE |
255 MT_QUIRK_SLOT_IS_CONTACTID,
256 .maxcontacts = 2 },
257 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
258 .quirks = MT_QUIRK_VALID_IS_INRANGE |
259 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
260 .maxcontacts = 2 },
261 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
262 .quirks = MT_QUIRK_VALID_IS_INRANGE |
263 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
264 { .name = MT_CLS_WIN_8,
265 .quirks = MT_QUIRK_ALWAYS_VALID |
266 MT_QUIRK_IGNORE_DUPLICATES |
267 MT_QUIRK_HOVERING |
268 MT_QUIRK_CONTACT_CNT_ACCURATE |
269 MT_QUIRK_STICKY_FINGERS |
270 MT_QUIRK_WIN8_PTP_BUTTONS },
271 { .name = MT_CLS_EXPORT_ALL_INPUTS,
272 .quirks = MT_QUIRK_ALWAYS_VALID |
273 MT_QUIRK_CONTACT_CNT_ACCURATE,
274 .export_all_inputs = true },
275 { .name = MT_CLS_WIN_8_DUAL,
276 .quirks = MT_QUIRK_ALWAYS_VALID |
277 MT_QUIRK_IGNORE_DUPLICATES |
278 MT_QUIRK_HOVERING |
279 MT_QUIRK_CONTACT_CNT_ACCURATE |
280 MT_QUIRK_WIN8_PTP_BUTTONS,
281 .export_all_inputs = true },
282
283 /*
284 * vendor specific classes
285 */
286 { .name = MT_CLS_3M,
287 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
288 MT_QUIRK_SLOT_IS_CONTACTID |
289 MT_QUIRK_TOUCH_SIZE_SCALING,
290 .sn_move = 2048,
291 .sn_width = 128,
292 .sn_height = 128,
293 .maxcontacts = 60,
294 },
295 { .name = MT_CLS_EGALAX,
296 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
297 MT_QUIRK_VALID_IS_INRANGE,
298 .sn_move = 4096,
299 .sn_pressure = 32,
300 },
301 { .name = MT_CLS_EGALAX_SERIAL,
302 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
303 MT_QUIRK_ALWAYS_VALID,
304 .sn_move = 4096,
305 .sn_pressure = 32,
306 },
307 { .name = MT_CLS_TOPSEED,
308 .quirks = MT_QUIRK_ALWAYS_VALID,
309 .is_indirect = true,
310 .maxcontacts = 2,
311 },
312 { .name = MT_CLS_PANASONIC,
313 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
314 .maxcontacts = 4 },
315 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
316 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
317 MT_QUIRK_VALID_IS_INRANGE |
318 MT_QUIRK_SLOT_IS_CONTACTID,
319 .maxcontacts = 2
320 },
321 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
322 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
323 MT_QUIRK_SLOT_IS_CONTACTID
324 },
325
326 { .name = MT_CLS_FLATFROG,
327 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
328 MT_QUIRK_NO_AREA,
329 .sn_move = 2048,
330 .maxcontacts = 40,
331 },
332 { .name = MT_CLS_LG,
333 .quirks = MT_QUIRK_ALWAYS_VALID |
334 MT_QUIRK_FIX_CONST_CONTACT_ID |
335 MT_QUIRK_IGNORE_DUPLICATES |
336 MT_QUIRK_HOVERING |
337 MT_QUIRK_CONTACT_CNT_ACCURATE },
338 { .name = MT_CLS_ASUS,
339 .quirks = MT_QUIRK_ALWAYS_VALID |
340 MT_QUIRK_CONTACT_CNT_ACCURATE |
341 MT_QUIRK_ASUS_CUSTOM_UP },
342 { .name = MT_CLS_VTL,
343 .quirks = MT_QUIRK_ALWAYS_VALID |
344 MT_QUIRK_CONTACT_CNT_ACCURATE |
345 MT_QUIRK_FORCE_GET_FEATURE,
346 },
347 { .name = MT_CLS_GOOGLE,
348 .quirks = MT_QUIRK_ALWAYS_VALID |
349 MT_QUIRK_CONTACT_CNT_ACCURATE |
350 MT_QUIRK_SLOT_IS_CONTACTID |
351 MT_QUIRK_HOVERING
352 },
353 { .name = MT_CLS_RAZER_BLADE_STEALTH,
354 .quirks = MT_QUIRK_ALWAYS_VALID |
355 MT_QUIRK_IGNORE_DUPLICATES |
356 MT_QUIRK_HOVERING |
357 MT_QUIRK_CONTACT_CNT_ACCURATE |
358 MT_QUIRK_WIN8_PTP_BUTTONS,
359 },
360 { }
361 };
362
mt_show_quirks(struct device * dev,struct device_attribute * attr,char * buf)363 static ssize_t mt_show_quirks(struct device *dev,
364 struct device_attribute *attr,
365 char *buf)
366 {
367 struct hid_device *hdev = to_hid_device(dev);
368 struct mt_device *td = hid_get_drvdata(hdev);
369
370 return sprintf(buf, "%u\n", td->mtclass.quirks);
371 }
372
mt_set_quirks(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)373 static ssize_t mt_set_quirks(struct device *dev,
374 struct device_attribute *attr,
375 const char *buf, size_t count)
376 {
377 struct hid_device *hdev = to_hid_device(dev);
378 struct mt_device *td = hid_get_drvdata(hdev);
379 struct mt_application *application;
380
381 unsigned long val;
382
383 if (kstrtoul(buf, 0, &val))
384 return -EINVAL;
385
386 td->mtclass.quirks = val;
387
388 list_for_each_entry(application, &td->applications, list) {
389 application->quirks = val;
390 if (!application->have_contact_count)
391 application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
392 }
393
394 return count;
395 }
396
397 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
398
399 static struct attribute *sysfs_attrs[] = {
400 &dev_attr_quirks.attr,
401 NULL
402 };
403
404 static const struct attribute_group mt_attribute_group = {
405 .attrs = sysfs_attrs
406 };
407
mt_get_feature(struct hid_device * hdev,struct hid_report * report)408 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
409 {
410 int ret;
411 u32 size = hid_report_len(report);
412 u8 *buf;
413
414 /*
415 * Do not fetch the feature report if the device has been explicitly
416 * marked as non-capable.
417 */
418 if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
419 return;
420
421 buf = hid_alloc_report_buf(report, GFP_KERNEL);
422 if (!buf)
423 return;
424
425 ret = hid_hw_raw_request(hdev, report->id, buf, size,
426 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
427 if (ret < 0) {
428 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
429 report->id);
430 } else {
431 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
432 size, 0);
433 if (ret)
434 dev_warn(&hdev->dev, "failed to report feature\n");
435 }
436
437 kfree(buf);
438 }
439
mt_feature_mapping(struct hid_device * hdev,struct hid_field * field,struct hid_usage * usage)440 static void mt_feature_mapping(struct hid_device *hdev,
441 struct hid_field *field, struct hid_usage *usage)
442 {
443 struct mt_device *td = hid_get_drvdata(hdev);
444
445 switch (usage->hid) {
446 case HID_DG_CONTACTMAX:
447 mt_get_feature(hdev, field->report);
448
449 td->maxcontacts = field->value[0];
450 if (!td->maxcontacts &&
451 field->logical_maximum <= MT_MAX_MAXCONTACT)
452 td->maxcontacts = field->logical_maximum;
453 if (td->mtclass.maxcontacts)
454 /* check if the maxcontacts is given by the class */
455 td->maxcontacts = td->mtclass.maxcontacts;
456
457 break;
458 case HID_DG_BUTTONTYPE:
459 if (usage->usage_index >= field->report_count) {
460 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
461 break;
462 }
463
464 mt_get_feature(hdev, field->report);
465 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
466 td->is_buttonpad = true;
467
468 break;
469 case 0xff0000c5:
470 /* Retrieve the Win8 blob once to enable some devices */
471 if (usage->usage_index == 0)
472 mt_get_feature(hdev, field->report);
473 break;
474 }
475 }
476
set_abs(struct input_dev * input,unsigned int code,struct hid_field * field,int snratio)477 static void set_abs(struct input_dev *input, unsigned int code,
478 struct hid_field *field, int snratio)
479 {
480 int fmin = field->logical_minimum;
481 int fmax = field->logical_maximum;
482 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
483 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
484 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
485 }
486
mt_allocate_usage(struct hid_device * hdev,struct mt_application * application)487 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
488 struct mt_application *application)
489 {
490 struct mt_usages *usage;
491
492 usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
493 if (!usage)
494 return NULL;
495
496 /* set some defaults so we do not need to check for null pointers */
497 usage->x = DEFAULT_ZERO;
498 usage->y = DEFAULT_ZERO;
499 usage->cx = DEFAULT_ZERO;
500 usage->cy = DEFAULT_ZERO;
501 usage->p = DEFAULT_ZERO;
502 usage->w = DEFAULT_ZERO;
503 usage->h = DEFAULT_ZERO;
504 usage->a = DEFAULT_ZERO;
505 usage->contactid = DEFAULT_ZERO;
506 usage->tip_state = DEFAULT_FALSE;
507 usage->inrange_state = DEFAULT_FALSE;
508 usage->confidence_state = DEFAULT_TRUE;
509
510 list_add_tail(&usage->list, &application->mt_usages);
511
512 return usage;
513 }
514
mt_allocate_application(struct mt_device * td,unsigned int application)515 static struct mt_application *mt_allocate_application(struct mt_device *td,
516 unsigned int application)
517 {
518 struct mt_application *mt_application;
519
520 mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
521 GFP_KERNEL);
522 if (!mt_application)
523 return NULL;
524
525 mt_application->application = application;
526 INIT_LIST_HEAD(&mt_application->mt_usages);
527
528 if (application == HID_DG_TOUCHSCREEN)
529 mt_application->mt_flags |= INPUT_MT_DIRECT;
530
531 /*
532 * Model touchscreens providing buttons as touchpads.
533 */
534 if (application == HID_DG_TOUCHPAD) {
535 mt_application->mt_flags |= INPUT_MT_POINTER;
536 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
537 }
538
539 mt_application->scantime = DEFAULT_ZERO;
540 mt_application->raw_cc = DEFAULT_ZERO;
541 mt_application->quirks = td->mtclass.quirks;
542
543 list_add_tail(&mt_application->list, &td->applications);
544
545 return mt_application;
546 }
547
mt_find_application(struct mt_device * td,unsigned int application)548 static struct mt_application *mt_find_application(struct mt_device *td,
549 unsigned int application)
550 {
551 struct mt_application *tmp, *mt_application = NULL;
552
553 list_for_each_entry(tmp, &td->applications, list) {
554 if (application == tmp->application) {
555 mt_application = tmp;
556 break;
557 }
558 }
559
560 if (!mt_application)
561 mt_application = mt_allocate_application(td, application);
562
563 return mt_application;
564 }
565
mt_allocate_report_data(struct mt_device * td,struct hid_report * report)566 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
567 struct hid_report *report)
568 {
569 struct mt_report_data *rdata;
570 struct hid_field *field;
571 int r, n;
572
573 rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
574 if (!rdata)
575 return NULL;
576
577 rdata->report = report;
578 rdata->application = mt_find_application(td, report->application);
579
580 if (!rdata->application) {
581 devm_kfree(&td->hdev->dev, rdata);
582 return NULL;
583 }
584
585 for (r = 0; r < report->maxfield; r++) {
586 field = report->field[r];
587
588 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
589 continue;
590
591 for (n = 0; n < field->report_count; n++) {
592 if (field->usage[n].hid == HID_DG_CONTACTID)
593 rdata->is_mt_collection = true;
594 }
595 }
596
597 list_add_tail(&rdata->list, &td->reports);
598
599 return rdata;
600 }
601
mt_find_report_data(struct mt_device * td,struct hid_report * report)602 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
603 struct hid_report *report)
604 {
605 struct mt_report_data *tmp, *rdata = NULL;
606
607 list_for_each_entry(tmp, &td->reports, list) {
608 if (report == tmp->report) {
609 rdata = tmp;
610 break;
611 }
612 }
613
614 if (!rdata)
615 rdata = mt_allocate_report_data(td, report);
616
617 return rdata;
618 }
619
mt_store_field(struct hid_device * hdev,struct mt_application * application,__s32 * value,size_t offset)620 static void mt_store_field(struct hid_device *hdev,
621 struct mt_application *application,
622 __s32 *value,
623 size_t offset)
624 {
625 struct mt_usages *usage;
626 __s32 **target;
627
628 if (list_empty(&application->mt_usages))
629 usage = mt_allocate_usage(hdev, application);
630 else
631 usage = list_last_entry(&application->mt_usages,
632 struct mt_usages,
633 list);
634
635 if (!usage)
636 return;
637
638 target = (__s32 **)((char *)usage + offset);
639
640 /* the value has already been filled, create a new slot */
641 if (*target != DEFAULT_TRUE &&
642 *target != DEFAULT_FALSE &&
643 *target != DEFAULT_ZERO) {
644 if (usage->contactid == DEFAULT_ZERO ||
645 usage->x == DEFAULT_ZERO ||
646 usage->y == DEFAULT_ZERO) {
647 hid_dbg(hdev,
648 "ignoring duplicate usage on incomplete");
649 return;
650 }
651 usage = mt_allocate_usage(hdev, application);
652 if (!usage)
653 return;
654
655 target = (__s32 **)((char *)usage + offset);
656 }
657
658 *target = value;
659 }
660
661 #define MT_STORE_FIELD(__name) \
662 mt_store_field(hdev, app, \
663 &field->value[usage->usage_index], \
664 offsetof(struct mt_usages, __name))
665
mt_touch_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max,struct mt_application * app)666 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
667 struct hid_field *field, struct hid_usage *usage,
668 unsigned long **bit, int *max, struct mt_application *app)
669 {
670 struct mt_device *td = hid_get_drvdata(hdev);
671 struct mt_class *cls = &td->mtclass;
672 int code;
673 struct hid_usage *prev_usage = NULL;
674
675 /*
676 * Model touchscreens providing buttons as touchpads.
677 */
678 if (field->application == HID_DG_TOUCHSCREEN &&
679 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
680 app->mt_flags |= INPUT_MT_POINTER;
681 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
682 }
683
684 /* count the buttons on touchpads */
685 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
686 app->buttons_count++;
687
688 if (usage->usage_index)
689 prev_usage = &field->usage[usage->usage_index - 1];
690
691 switch (usage->hid & HID_USAGE_PAGE) {
692
693 case HID_UP_GENDESK:
694 switch (usage->hid) {
695 case HID_GD_X:
696 if (prev_usage && (prev_usage->hid == usage->hid)) {
697 code = ABS_MT_TOOL_X;
698 MT_STORE_FIELD(cx);
699 } else {
700 code = ABS_MT_POSITION_X;
701 MT_STORE_FIELD(x);
702 }
703
704 set_abs(hi->input, code, field, cls->sn_move);
705
706 /*
707 * A system multi-axis that exports X and Y has a high
708 * chance of being used directly on a surface
709 */
710 if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
711 __set_bit(INPUT_PROP_DIRECT,
712 hi->input->propbit);
713 input_set_abs_params(hi->input,
714 ABS_MT_TOOL_TYPE,
715 MT_TOOL_DIAL,
716 MT_TOOL_DIAL, 0, 0);
717 }
718
719 return 1;
720 case HID_GD_Y:
721 if (prev_usage && (prev_usage->hid == usage->hid)) {
722 code = ABS_MT_TOOL_Y;
723 MT_STORE_FIELD(cy);
724 } else {
725 code = ABS_MT_POSITION_Y;
726 MT_STORE_FIELD(y);
727 }
728
729 set_abs(hi->input, code, field, cls->sn_move);
730
731 return 1;
732 }
733 return 0;
734
735 case HID_UP_DIGITIZER:
736 switch (usage->hid) {
737 case HID_DG_INRANGE:
738 if (app->quirks & MT_QUIRK_HOVERING) {
739 input_set_abs_params(hi->input,
740 ABS_MT_DISTANCE, 0, 1, 0, 0);
741 }
742 MT_STORE_FIELD(inrange_state);
743 return 1;
744 case HID_DG_CONFIDENCE:
745 if ((cls->name == MT_CLS_WIN_8 ||
746 cls->name == MT_CLS_WIN_8_DUAL) &&
747 (field->application == HID_DG_TOUCHPAD ||
748 field->application == HID_DG_TOUCHSCREEN))
749 app->quirks |= MT_QUIRK_CONFIDENCE;
750
751 if (app->quirks & MT_QUIRK_CONFIDENCE)
752 input_set_abs_params(hi->input,
753 ABS_MT_TOOL_TYPE,
754 MT_TOOL_FINGER,
755 MT_TOOL_PALM, 0, 0);
756
757 MT_STORE_FIELD(confidence_state);
758 return 1;
759 case HID_DG_TIPSWITCH:
760 if (field->application != HID_GD_SYSTEM_MULTIAXIS)
761 input_set_capability(hi->input,
762 EV_KEY, BTN_TOUCH);
763 MT_STORE_FIELD(tip_state);
764 return 1;
765 case HID_DG_CONTACTID:
766 MT_STORE_FIELD(contactid);
767 app->touches_by_report++;
768 return 1;
769 case HID_DG_WIDTH:
770 if (!(app->quirks & MT_QUIRK_NO_AREA))
771 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
772 cls->sn_width);
773 MT_STORE_FIELD(w);
774 return 1;
775 case HID_DG_HEIGHT:
776 if (!(app->quirks & MT_QUIRK_NO_AREA)) {
777 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
778 cls->sn_height);
779
780 /*
781 * Only set ABS_MT_ORIENTATION if it is not
782 * already set by the HID_DG_AZIMUTH usage.
783 */
784 if (!test_bit(ABS_MT_ORIENTATION,
785 hi->input->absbit))
786 input_set_abs_params(hi->input,
787 ABS_MT_ORIENTATION, 0, 1, 0, 0);
788 }
789 MT_STORE_FIELD(h);
790 return 1;
791 case HID_DG_TIPPRESSURE:
792 set_abs(hi->input, ABS_MT_PRESSURE, field,
793 cls->sn_pressure);
794 MT_STORE_FIELD(p);
795 return 1;
796 case HID_DG_SCANTIME:
797 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
798 app->scantime = &field->value[usage->usage_index];
799 app->scantime_logical_max = field->logical_maximum;
800 return 1;
801 case HID_DG_CONTACTCOUNT:
802 app->have_contact_count = true;
803 app->raw_cc = &field->value[usage->usage_index];
804 return 1;
805 case HID_DG_AZIMUTH:
806 /*
807 * Azimuth has the range of [0, MAX) representing a full
808 * revolution. Set ABS_MT_ORIENTATION to a quarter of
809 * MAX according the definition of ABS_MT_ORIENTATION
810 */
811 input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
812 -field->logical_maximum / 4,
813 field->logical_maximum / 4,
814 cls->sn_move ?
815 field->logical_maximum / cls->sn_move : 0, 0);
816 MT_STORE_FIELD(a);
817 return 1;
818 case HID_DG_CONTACTMAX:
819 /* contact max are global to the report */
820 return -1;
821 case HID_DG_TOUCH:
822 /* Legacy devices use TIPSWITCH and not TOUCH.
823 * Let's just ignore this field. */
824 return -1;
825 }
826 /* let hid-input decide for the others */
827 return 0;
828
829 case HID_UP_BUTTON:
830 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
831 /*
832 * MS PTP spec says that external buttons left and right have
833 * usages 2 and 3.
834 */
835 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
836 field->application == HID_DG_TOUCHPAD &&
837 (usage->hid & HID_USAGE) > 1)
838 code--;
839
840 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
841 code = BTN_0 + ((usage->hid - 1) & HID_USAGE);
842
843 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
844 if (!*bit)
845 return -1;
846 input_set_capability(hi->input, EV_KEY, code);
847 return 1;
848
849 case 0xff000000:
850 /* we do not want to map these: no input-oriented meaning */
851 return -1;
852 }
853
854 return 0;
855 }
856
mt_compute_slot(struct mt_device * td,struct mt_application * app,struct mt_usages * slot,struct input_dev * input)857 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
858 struct mt_usages *slot,
859 struct input_dev *input)
860 {
861 __s32 quirks = app->quirks;
862
863 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
864 return *slot->contactid;
865
866 if (quirks & MT_QUIRK_CYPRESS)
867 return cypress_compute_slot(app, slot);
868
869 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
870 return app->num_received;
871
872 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
873 return *slot->contactid - 1;
874
875 return input_mt_get_slot_by_key(input, *slot->contactid);
876 }
877
mt_release_pending_palms(struct mt_device * td,struct mt_application * app,struct input_dev * input)878 static void mt_release_pending_palms(struct mt_device *td,
879 struct mt_application *app,
880 struct input_dev *input)
881 {
882 int slotnum;
883 bool need_sync = false;
884
885 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
886 clear_bit(slotnum, app->pending_palm_slots);
887
888 input_mt_slot(input, slotnum);
889 input_mt_report_slot_state(input, MT_TOOL_PALM, false);
890
891 need_sync = true;
892 }
893
894 if (need_sync) {
895 input_mt_sync_frame(input);
896 input_sync(input);
897 }
898 }
899
900 /*
901 * this function is called when a whole packet has been received and processed,
902 * so that it can decide what to send to the input layer.
903 */
mt_sync_frame(struct mt_device * td,struct mt_application * app,struct input_dev * input)904 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
905 struct input_dev *input)
906 {
907 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
908 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
909
910 input_mt_sync_frame(input);
911 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
912 input_sync(input);
913
914 mt_release_pending_palms(td, app, input);
915
916 app->num_received = 0;
917 app->left_button_state = 0;
918
919 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
920 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
921 else
922 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
923 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
924 }
925
mt_compute_timestamp(struct mt_application * app,__s32 value)926 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
927 {
928 long delta = value - app->prev_scantime;
929 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
930
931 app->jiffies = jiffies;
932
933 if (delta < 0)
934 delta += app->scantime_logical_max;
935
936 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
937 delta *= 100;
938
939 if (jdelta > MAX_TIMESTAMP_INTERVAL)
940 /* No data received for a while, resync the timestamp. */
941 return 0;
942 else
943 return app->timestamp + delta;
944 }
945
mt_touch_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)946 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
947 struct hid_usage *usage, __s32 value)
948 {
949 /* we will handle the hidinput part later, now remains hiddev */
950 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
951 hid->hiddev_hid_event(hid, field, usage, value);
952
953 return 1;
954 }
955
mt_process_slot(struct mt_device * td,struct input_dev * input,struct mt_application * app,struct mt_usages * slot)956 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
957 struct mt_application *app,
958 struct mt_usages *slot)
959 {
960 struct input_mt *mt = input->mt;
961 __s32 quirks = app->quirks;
962 bool valid = true;
963 bool confidence_state = true;
964 bool inrange_state = false;
965 int active;
966 int slotnum;
967 int tool = MT_TOOL_FINGER;
968
969 if (!slot)
970 return -EINVAL;
971
972 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
973 app->num_received >= app->num_expected)
974 return -EAGAIN;
975
976 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
977 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
978 valid = *slot->inrange_state;
979 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
980 valid = *slot->tip_state;
981 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
982 valid = *slot->confidence_state;
983
984 if (!valid)
985 return 0;
986 }
987
988 slotnum = mt_compute_slot(td, app, slot, input);
989 if (slotnum < 0 || slotnum >= td->maxcontacts)
990 return 0;
991
992 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
993 struct input_mt_slot *i_slot = &mt->slots[slotnum];
994
995 if (input_mt_is_active(i_slot) &&
996 input_mt_is_used(mt, i_slot))
997 return -EAGAIN;
998 }
999
1000 if (quirks & MT_QUIRK_CONFIDENCE)
1001 confidence_state = *slot->confidence_state;
1002
1003 if (quirks & MT_QUIRK_HOVERING)
1004 inrange_state = *slot->inrange_state;
1005
1006 active = *slot->tip_state || inrange_state;
1007
1008 if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1009 tool = MT_TOOL_DIAL;
1010 else if (unlikely(!confidence_state)) {
1011 tool = MT_TOOL_PALM;
1012 if (!active && mt &&
1013 input_mt_is_active(&mt->slots[slotnum])) {
1014 /*
1015 * The non-confidence was reported for
1016 * previously valid contact that is also no
1017 * longer valid. We can't simply report
1018 * lift-off as userspace will not be aware
1019 * of non-confidence, so we need to split
1020 * it into 2 events: active MT_TOOL_PALM
1021 * and a separate liftoff.
1022 */
1023 active = true;
1024 set_bit(slotnum, app->pending_palm_slots);
1025 }
1026 }
1027
1028 input_mt_slot(input, slotnum);
1029 input_mt_report_slot_state(input, tool, active);
1030 if (active) {
1031 /* this finger is in proximity of the sensor */
1032 int wide = (*slot->w > *slot->h);
1033 int major = max(*slot->w, *slot->h);
1034 int minor = min(*slot->w, *slot->h);
1035 int orientation = wide;
1036 int max_azimuth;
1037 int azimuth;
1038
1039 if (slot->a != DEFAULT_ZERO) {
1040 /*
1041 * Azimuth is counter-clockwise and ranges from [0, MAX)
1042 * (a full revolution). Convert it to clockwise ranging
1043 * [-MAX/2, MAX/2].
1044 *
1045 * Note that ABS_MT_ORIENTATION require us to report
1046 * the limit of [-MAX/4, MAX/4], but the value can go
1047 * out of range to [-MAX/2, MAX/2] to report an upside
1048 * down ellipsis.
1049 */
1050 azimuth = *slot->a;
1051 max_azimuth = input_abs_get_max(input,
1052 ABS_MT_ORIENTATION);
1053 if (azimuth > max_azimuth * 2)
1054 azimuth -= max_azimuth * 4;
1055 orientation = -azimuth;
1056 }
1057
1058 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1059 /*
1060 * divided by two to match visual scale of touch
1061 * for devices with this quirk
1062 */
1063 major = major >> 1;
1064 minor = minor >> 1;
1065 }
1066
1067 input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
1068 input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
1069 input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
1070 input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy);
1071 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1072 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1073 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1074 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1075 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1076
1077 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1078 }
1079
1080 return 0;
1081 }
1082
mt_process_mt_event(struct hid_device * hid,struct mt_application * app,struct hid_field * field,struct hid_usage * usage,__s32 value,bool first_packet)1083 static void mt_process_mt_event(struct hid_device *hid,
1084 struct mt_application *app,
1085 struct hid_field *field,
1086 struct hid_usage *usage,
1087 __s32 value,
1088 bool first_packet)
1089 {
1090 __s32 quirks = app->quirks;
1091 struct input_dev *input = field->hidinput->input;
1092
1093 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1094 return;
1095
1096 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1097
1098 /*
1099 * For Win8 PTP touchpads we should only look at
1100 * non finger/touch events in the first_packet of a
1101 * (possible) multi-packet frame.
1102 */
1103 if (!first_packet)
1104 return;
1105
1106 /*
1107 * For Win8 PTP touchpads we map both the clickpad click
1108 * and any "external" left buttons to BTN_LEFT if a
1109 * device claims to have both we need to report 1 for
1110 * BTN_LEFT if either is pressed, so we or all values
1111 * together and report the result in mt_sync_frame().
1112 */
1113 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1114 app->left_button_state |= value;
1115 return;
1116 }
1117 }
1118
1119 input_event(input, usage->type, usage->code, value);
1120 }
1121
mt_touch_report(struct hid_device * hid,struct mt_report_data * rdata)1122 static void mt_touch_report(struct hid_device *hid,
1123 struct mt_report_data *rdata)
1124 {
1125 struct mt_device *td = hid_get_drvdata(hid);
1126 struct hid_report *report = rdata->report;
1127 struct mt_application *app = rdata->application;
1128 struct hid_field *field;
1129 struct input_dev *input;
1130 struct mt_usages *slot;
1131 bool first_packet;
1132 unsigned count;
1133 int r, n;
1134 int scantime = 0;
1135 int contact_count = -1;
1136
1137 /* sticky fingers release in progress, abort */
1138 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1139 return;
1140
1141 scantime = *app->scantime;
1142 app->timestamp = mt_compute_timestamp(app, scantime);
1143 if (app->raw_cc != DEFAULT_ZERO)
1144 contact_count = *app->raw_cc;
1145
1146 /*
1147 * Includes multi-packet support where subsequent
1148 * packets are sent with zero contactcount.
1149 */
1150 if (contact_count >= 0) {
1151 /*
1152 * For Win8 PTPs the first packet (td->num_received == 0) may
1153 * have a contactcount of 0 if there only is a button event.
1154 * We double check that this is not a continuation packet
1155 * of a possible multi-packet frame be checking that the
1156 * timestamp has changed.
1157 */
1158 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1159 app->num_received == 0 &&
1160 app->prev_scantime != scantime)
1161 app->num_expected = contact_count;
1162 /* A non 0 contact count always indicates a first packet */
1163 else if (contact_count)
1164 app->num_expected = contact_count;
1165 }
1166 app->prev_scantime = scantime;
1167
1168 first_packet = app->num_received == 0;
1169
1170 input = report->field[0]->hidinput->input;
1171
1172 list_for_each_entry(slot, &app->mt_usages, list) {
1173 if (!mt_process_slot(td, input, app, slot))
1174 app->num_received++;
1175 }
1176
1177 for (r = 0; r < report->maxfield; r++) {
1178 field = report->field[r];
1179 count = field->report_count;
1180
1181 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1182 continue;
1183
1184 for (n = 0; n < count; n++)
1185 mt_process_mt_event(hid, app, field,
1186 &field->usage[n], field->value[n],
1187 first_packet);
1188 }
1189
1190 if (app->num_received >= app->num_expected)
1191 mt_sync_frame(td, app, input);
1192
1193 /*
1194 * Windows 8 specs says 2 things:
1195 * - once a contact has been reported, it has to be reported in each
1196 * subsequent report
1197 * - the report rate when fingers are present has to be at least
1198 * the refresh rate of the screen, 60 or 120 Hz
1199 *
1200 * I interprete this that the specification forces a report rate of
1201 * at least 60 Hz for a touchscreen to be certified.
1202 * Which means that if we do not get a report whithin 16 ms, either
1203 * something wrong happens, either the touchscreen forgets to send
1204 * a release. Taking a reasonable margin allows to remove issues
1205 * with USB communication or the load of the machine.
1206 *
1207 * Given that Win 8 devices are forced to send a release, this will
1208 * only affect laggish machines and the ones that have a firmware
1209 * defect.
1210 */
1211 if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1212 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1213 mod_timer(&td->release_timer,
1214 jiffies + msecs_to_jiffies(100));
1215 else
1216 del_timer(&td->release_timer);
1217 }
1218
1219 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1220 }
1221
mt_touch_input_configured(struct hid_device * hdev,struct hid_input * hi,struct mt_application * app)1222 static int mt_touch_input_configured(struct hid_device *hdev,
1223 struct hid_input *hi,
1224 struct mt_application *app)
1225 {
1226 struct mt_device *td = hid_get_drvdata(hdev);
1227 struct mt_class *cls = &td->mtclass;
1228 struct input_dev *input = hi->input;
1229 int ret;
1230
1231 if (!td->maxcontacts)
1232 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1233
1234 mt_post_parse(td, app);
1235 if (td->serial_maybe)
1236 mt_post_parse_default_settings(td, app);
1237
1238 if (cls->is_indirect)
1239 app->mt_flags |= INPUT_MT_POINTER;
1240
1241 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1242 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1243
1244 /* check for clickpads */
1245 if ((app->mt_flags & INPUT_MT_POINTER) &&
1246 (app->buttons_count == 1))
1247 td->is_buttonpad = true;
1248
1249 if (td->is_buttonpad)
1250 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1251
1252 app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1253 BITS_TO_LONGS(td->maxcontacts),
1254 sizeof(long),
1255 GFP_KERNEL);
1256 if (!app->pending_palm_slots)
1257 return -ENOMEM;
1258
1259 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1260 if (ret)
1261 return ret;
1262
1263 app->mt_flags = 0;
1264 return 0;
1265 }
1266
1267 #define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1268 max, EV_KEY, (c))
mt_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)1269 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1270 struct hid_field *field, struct hid_usage *usage,
1271 unsigned long **bit, int *max)
1272 {
1273 struct mt_device *td = hid_get_drvdata(hdev);
1274 struct mt_application *application;
1275 struct mt_report_data *rdata;
1276
1277 rdata = mt_find_report_data(td, field->report);
1278 if (!rdata) {
1279 hid_err(hdev, "failed to allocate data for report\n");
1280 return 0;
1281 }
1282
1283 application = rdata->application;
1284
1285 /*
1286 * If mtclass.export_all_inputs is not set, only map fields from
1287 * TouchScreen or TouchPad collections. We need to ignore fields
1288 * that belong to other collections such as Mouse that might have
1289 * the same GenericDesktop usages.
1290 */
1291 if (!td->mtclass.export_all_inputs &&
1292 field->application != HID_DG_TOUCHSCREEN &&
1293 field->application != HID_DG_PEN &&
1294 field->application != HID_DG_TOUCHPAD &&
1295 field->application != HID_GD_KEYBOARD &&
1296 field->application != HID_GD_SYSTEM_CONTROL &&
1297 field->application != HID_CP_CONSUMER_CONTROL &&
1298 field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1299 field->application != HID_GD_SYSTEM_MULTIAXIS &&
1300 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1301 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1302 return -1;
1303
1304 /*
1305 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1306 * touchpad report descriptor. We need to treat these as an array to
1307 * map usages to input keys.
1308 */
1309 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1310 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1311 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1312 set_bit(EV_REP, hi->input->evbit);
1313 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1314 field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1315 switch (usage->hid & HID_USAGE) {
1316 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
1317 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
1318 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
1319 case 0x6b: mt_map_key_clear(KEY_F21); break;
1320 case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
1321 default:
1322 return -1;
1323 }
1324 return 1;
1325 }
1326
1327 if (rdata->is_mt_collection)
1328 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1329 application);
1330
1331 /* let hid-core decide for the others */
1332 return 0;
1333 }
1334
mt_input_mapped(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)1335 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1336 struct hid_field *field, struct hid_usage *usage,
1337 unsigned long **bit, int *max)
1338 {
1339 struct mt_device *td = hid_get_drvdata(hdev);
1340 struct mt_report_data *rdata;
1341
1342 rdata = mt_find_report_data(td, field->report);
1343 if (rdata && rdata->is_mt_collection) {
1344 /* We own these mappings, tell hid-input to ignore them */
1345 return -1;
1346 }
1347
1348 /* let hid-core decide for the others */
1349 return 0;
1350 }
1351
mt_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1352 static int mt_event(struct hid_device *hid, struct hid_field *field,
1353 struct hid_usage *usage, __s32 value)
1354 {
1355 struct mt_device *td = hid_get_drvdata(hid);
1356 struct mt_report_data *rdata;
1357
1358 rdata = mt_find_report_data(td, field->report);
1359 if (rdata && rdata->is_mt_collection)
1360 return mt_touch_event(hid, field, usage, value);
1361
1362 return 0;
1363 }
1364
mt_report(struct hid_device * hid,struct hid_report * report)1365 static void mt_report(struct hid_device *hid, struct hid_report *report)
1366 {
1367 struct mt_device *td = hid_get_drvdata(hid);
1368 struct hid_field *field = report->field[0];
1369 struct mt_report_data *rdata;
1370
1371 if (!(hid->claimed & HID_CLAIMED_INPUT))
1372 return;
1373
1374 rdata = mt_find_report_data(td, report);
1375 if (rdata && rdata->is_mt_collection)
1376 return mt_touch_report(hid, rdata);
1377
1378 if (field && field->hidinput && field->hidinput->input)
1379 input_sync(field->hidinput->input);
1380 }
1381
mt_need_to_apply_feature(struct hid_device * hdev,struct hid_field * field,struct hid_usage * usage,enum latency_mode latency,bool surface_switch,bool button_switch,bool * inputmode_found)1382 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1383 struct hid_field *field,
1384 struct hid_usage *usage,
1385 enum latency_mode latency,
1386 bool surface_switch,
1387 bool button_switch,
1388 bool *inputmode_found)
1389 {
1390 struct mt_device *td = hid_get_drvdata(hdev);
1391 struct mt_class *cls = &td->mtclass;
1392 struct hid_report *report = field->report;
1393 unsigned int index = usage->usage_index;
1394 char *buf;
1395 u32 report_len;
1396 int max;
1397
1398 switch (usage->hid) {
1399 case HID_DG_INPUTMODE:
1400 /*
1401 * Some elan panels wrongly declare 2 input mode features,
1402 * and silently ignore when we set the value in the second
1403 * field. Skip the second feature and hope for the best.
1404 */
1405 if (*inputmode_found)
1406 return false;
1407
1408 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1409 report_len = hid_report_len(report);
1410 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1411 if (!buf) {
1412 hid_err(hdev,
1413 "failed to allocate buffer for report\n");
1414 return false;
1415 }
1416 hid_hw_raw_request(hdev, report->id, buf, report_len,
1417 HID_FEATURE_REPORT,
1418 HID_REQ_GET_REPORT);
1419 kfree(buf);
1420 }
1421
1422 field->value[index] = td->inputmode_value;
1423 *inputmode_found = true;
1424 return true;
1425
1426 case HID_DG_CONTACTMAX:
1427 if (cls->maxcontacts) {
1428 max = min_t(int, field->logical_maximum,
1429 cls->maxcontacts);
1430 if (field->value[index] != max) {
1431 field->value[index] = max;
1432 return true;
1433 }
1434 }
1435 break;
1436
1437 case HID_DG_LATENCYMODE:
1438 field->value[index] = latency;
1439 return true;
1440
1441 case HID_DG_SURFACESWITCH:
1442 field->value[index] = surface_switch;
1443 return true;
1444
1445 case HID_DG_BUTTONSWITCH:
1446 field->value[index] = button_switch;
1447 return true;
1448 }
1449
1450 return false; /* no need to update the report */
1451 }
1452
mt_set_modes(struct hid_device * hdev,enum latency_mode latency,bool surface_switch,bool button_switch)1453 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1454 bool surface_switch, bool button_switch)
1455 {
1456 struct hid_report_enum *rep_enum;
1457 struct hid_report *rep;
1458 struct hid_usage *usage;
1459 int i, j;
1460 bool update_report;
1461 bool inputmode_found = false;
1462
1463 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1464 list_for_each_entry(rep, &rep_enum->report_list, list) {
1465 update_report = false;
1466
1467 for (i = 0; i < rep->maxfield; i++) {
1468 /* Ignore if report count is out of bounds. */
1469 if (rep->field[i]->report_count < 1)
1470 continue;
1471
1472 for (j = 0; j < rep->field[i]->maxusage; j++) {
1473 usage = &rep->field[i]->usage[j];
1474
1475 if (mt_need_to_apply_feature(hdev,
1476 rep->field[i],
1477 usage,
1478 latency,
1479 surface_switch,
1480 button_switch,
1481 &inputmode_found))
1482 update_report = true;
1483 }
1484 }
1485
1486 if (update_report)
1487 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1488 }
1489 }
1490
mt_post_parse_default_settings(struct mt_device * td,struct mt_application * app)1491 static void mt_post_parse_default_settings(struct mt_device *td,
1492 struct mt_application *app)
1493 {
1494 __s32 quirks = app->quirks;
1495
1496 /* unknown serial device needs special quirks */
1497 if (list_is_singular(&app->mt_usages)) {
1498 quirks |= MT_QUIRK_ALWAYS_VALID;
1499 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1500 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1501 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1502 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1503 }
1504
1505 app->quirks = quirks;
1506 }
1507
mt_post_parse(struct mt_device * td,struct mt_application * app)1508 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1509 {
1510 if (!app->have_contact_count)
1511 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1512 }
1513
mt_input_configured(struct hid_device * hdev,struct hid_input * hi)1514 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1515 {
1516 struct mt_device *td = hid_get_drvdata(hdev);
1517 char *name;
1518 const char *suffix = NULL;
1519 unsigned int application = 0;
1520 struct mt_report_data *rdata;
1521 struct mt_application *mt_application = NULL;
1522 struct hid_report *report;
1523 int ret;
1524
1525 list_for_each_entry(report, &hi->reports, hidinput_list) {
1526 application = report->application;
1527 rdata = mt_find_report_data(td, report);
1528 if (!rdata) {
1529 hid_err(hdev, "failed to allocate data for report\n");
1530 return -ENOMEM;
1531 }
1532
1533 mt_application = rdata->application;
1534
1535 if (rdata->is_mt_collection) {
1536 ret = mt_touch_input_configured(hdev, hi,
1537 mt_application);
1538 if (ret)
1539 return ret;
1540 }
1541
1542 /*
1543 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1544 * for the stylus. Check this first, and then rely on
1545 * the application field.
1546 */
1547 if (report->field[0]->physical == HID_DG_STYLUS) {
1548 suffix = "Pen";
1549 /* force BTN_STYLUS to allow tablet matching in udev */
1550 __set_bit(BTN_STYLUS, hi->input->keybit);
1551 }
1552 }
1553
1554 if (!suffix) {
1555 switch (application) {
1556 case HID_GD_KEYBOARD:
1557 case HID_GD_KEYPAD:
1558 case HID_GD_MOUSE:
1559 case HID_DG_TOUCHPAD:
1560 case HID_GD_SYSTEM_CONTROL:
1561 case HID_CP_CONSUMER_CONTROL:
1562 case HID_GD_WIRELESS_RADIO_CTLS:
1563 case HID_GD_SYSTEM_MULTIAXIS:
1564 /* already handled by hid core */
1565 break;
1566 case HID_DG_TOUCHSCREEN:
1567 /* we do not set suffix = "Touchscreen" */
1568 hi->input->name = hdev->name;
1569 break;
1570 case HID_DG_STYLUS:
1571 /* force BTN_STYLUS to allow tablet matching in udev */
1572 __set_bit(BTN_STYLUS, hi->input->keybit);
1573 break;
1574 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1575 suffix = "Custom Media Keys";
1576 break;
1577 default:
1578 suffix = "UNKNOWN";
1579 break;
1580 }
1581 }
1582
1583 if (suffix) {
1584 name = devm_kzalloc(&hi->input->dev,
1585 strlen(hdev->name) + strlen(suffix) + 2,
1586 GFP_KERNEL);
1587 if (name) {
1588 sprintf(name, "%s %s", hdev->name, suffix);
1589 hi->input->name = name;
1590 }
1591 }
1592
1593 return 0;
1594 }
1595
mt_fix_const_field(struct hid_field * field,unsigned int usage)1596 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1597 {
1598 if (field->usage[0].hid != usage ||
1599 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1600 return;
1601
1602 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1603 field->flags |= HID_MAIN_ITEM_VARIABLE;
1604 }
1605
mt_fix_const_fields(struct hid_device * hdev,unsigned int usage)1606 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1607 {
1608 struct hid_report *report;
1609 int i;
1610
1611 list_for_each_entry(report,
1612 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1613 list) {
1614
1615 if (!report->maxfield)
1616 continue;
1617
1618 for (i = 0; i < report->maxfield; i++)
1619 if (report->field[i]->maxusage >= 1)
1620 mt_fix_const_field(report->field[i], usage);
1621 }
1622 }
1623
mt_release_contacts(struct hid_device * hid)1624 static void mt_release_contacts(struct hid_device *hid)
1625 {
1626 struct hid_input *hidinput;
1627 struct mt_application *application;
1628 struct mt_device *td = hid_get_drvdata(hid);
1629
1630 list_for_each_entry(hidinput, &hid->inputs, list) {
1631 struct input_dev *input_dev = hidinput->input;
1632 struct input_mt *mt = input_dev->mt;
1633 int i;
1634
1635 if (mt) {
1636 for (i = 0; i < mt->num_slots; i++) {
1637 input_mt_slot(input_dev, i);
1638 input_mt_report_slot_state(input_dev,
1639 MT_TOOL_FINGER,
1640 false);
1641 }
1642 input_mt_sync_frame(input_dev);
1643 input_sync(input_dev);
1644 }
1645 }
1646
1647 list_for_each_entry(application, &td->applications, list) {
1648 application->num_received = 0;
1649 }
1650 }
1651
mt_expired_timeout(struct timer_list * t)1652 static void mt_expired_timeout(struct timer_list *t)
1653 {
1654 struct mt_device *td = from_timer(td, t, release_timer);
1655 struct hid_device *hdev = td->hdev;
1656
1657 /*
1658 * An input report came in just before we release the sticky fingers,
1659 * it will take care of the sticky fingers.
1660 */
1661 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1662 return;
1663 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1664 mt_release_contacts(hdev);
1665 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1666 }
1667
mt_probe(struct hid_device * hdev,const struct hid_device_id * id)1668 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1669 {
1670 int ret, i;
1671 struct mt_device *td;
1672 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1673
1674 for (i = 0; mt_classes[i].name ; i++) {
1675 if (id->driver_data == mt_classes[i].name) {
1676 mtclass = &(mt_classes[i]);
1677 break;
1678 }
1679 }
1680
1681 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1682 if (!td) {
1683 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1684 return -ENOMEM;
1685 }
1686 td->hdev = hdev;
1687 td->mtclass = *mtclass;
1688 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1689 hid_set_drvdata(hdev, td);
1690
1691 INIT_LIST_HEAD(&td->applications);
1692 INIT_LIST_HEAD(&td->reports);
1693
1694 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1695 td->serial_maybe = true;
1696
1697 /* This allows the driver to correctly support devices
1698 * that emit events over several HID messages.
1699 */
1700 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1701
1702 /*
1703 * This allows the driver to handle different input sensors
1704 * that emits events through different applications on the same HID
1705 * device.
1706 */
1707 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1708
1709 if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1710 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1711
1712 timer_setup(&td->release_timer, mt_expired_timeout, 0);
1713
1714 ret = hid_parse(hdev);
1715 if (ret != 0)
1716 return ret;
1717
1718 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1719 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1720
1721 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1722 if (ret)
1723 return ret;
1724
1725 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1726 if (ret)
1727 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1728 hdev->name);
1729
1730 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1731
1732 return 0;
1733 }
1734
1735 #ifdef CONFIG_PM
mt_reset_resume(struct hid_device * hdev)1736 static int mt_reset_resume(struct hid_device *hdev)
1737 {
1738 mt_release_contacts(hdev);
1739 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1740 return 0;
1741 }
1742
mt_resume(struct hid_device * hdev)1743 static int mt_resume(struct hid_device *hdev)
1744 {
1745 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1746 * It should be safe to send it to other devices too.
1747 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1748
1749 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1750
1751 return 0;
1752 }
1753 #endif
1754
mt_remove(struct hid_device * hdev)1755 static void mt_remove(struct hid_device *hdev)
1756 {
1757 struct mt_device *td = hid_get_drvdata(hdev);
1758
1759 del_timer_sync(&td->release_timer);
1760
1761 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1762 hid_hw_stop(hdev);
1763 }
1764
1765 /*
1766 * This list contains only:
1767 * - VID/PID of products not working with the default multitouch handling
1768 * - 2 generic rules.
1769 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1770 */
1771 static const struct hid_device_id mt_devices[] = {
1772
1773 /* 3M panels */
1774 { .driver_data = MT_CLS_3M,
1775 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1776 USB_DEVICE_ID_3M1968) },
1777 { .driver_data = MT_CLS_3M,
1778 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1779 USB_DEVICE_ID_3M2256) },
1780 { .driver_data = MT_CLS_3M,
1781 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1782 USB_DEVICE_ID_3M3266) },
1783
1784 /* Alps devices */
1785 { .driver_data = MT_CLS_WIN_8_DUAL,
1786 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1787 USB_VENDOR_ID_ALPS_JP,
1788 HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
1789 { .driver_data = MT_CLS_WIN_8_DUAL,
1790 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1791 USB_VENDOR_ID_ALPS_JP,
1792 HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
1793 { .driver_data = MT_CLS_WIN_8_DUAL,
1794 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1795 USB_VENDOR_ID_ALPS_JP,
1796 HID_DEVICE_ID_ALPS_1222) },
1797
1798 /* Lenovo X1 TAB Gen 2 */
1799 { .driver_data = MT_CLS_WIN_8_DUAL,
1800 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1801 USB_VENDOR_ID_LENOVO,
1802 USB_DEVICE_ID_LENOVO_X1_TAB) },
1803
1804 /* Anton devices */
1805 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1806 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1807 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1808
1809 /* Asus T304UA */
1810 { .driver_data = MT_CLS_ASUS,
1811 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1812 USB_VENDOR_ID_ASUSTEK,
1813 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1814
1815 /* Atmel panels */
1816 { .driver_data = MT_CLS_SERIAL,
1817 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1818 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1819
1820 /* Baanto multitouch devices */
1821 { .driver_data = MT_CLS_NSMU,
1822 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1823 USB_DEVICE_ID_BAANTO_MT_190W2) },
1824
1825 /* Cando panels */
1826 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1827 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1828 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1829 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1830 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1831 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1832
1833 /* Chunghwa Telecom touch panels */
1834 { .driver_data = MT_CLS_NSMU,
1835 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1836 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1837
1838 /* Cirque devices */
1839 { .driver_data = MT_CLS_WIN_8_DUAL,
1840 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1841 I2C_VENDOR_ID_CIRQUE,
1842 I2C_PRODUCT_ID_CIRQUE_121F) },
1843
1844 /* CJTouch panels */
1845 { .driver_data = MT_CLS_NSMU,
1846 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1847 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1848 { .driver_data = MT_CLS_NSMU,
1849 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1850 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1851
1852 /* CVTouch panels */
1853 { .driver_data = MT_CLS_NSMU,
1854 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1855 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1856
1857 /* eGalax devices (resistive) */
1858 { .driver_data = MT_CLS_EGALAX,
1859 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1860 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1861 { .driver_data = MT_CLS_EGALAX,
1862 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1863 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1864
1865 /* eGalax devices (capacitive) */
1866 { .driver_data = MT_CLS_EGALAX_SERIAL,
1867 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1868 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1869 { .driver_data = MT_CLS_EGALAX,
1870 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1871 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1872 { .driver_data = MT_CLS_EGALAX_SERIAL,
1873 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1874 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1875 { .driver_data = MT_CLS_EGALAX_SERIAL,
1876 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1877 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1878 { .driver_data = MT_CLS_EGALAX_SERIAL,
1879 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1880 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1881 { .driver_data = MT_CLS_EGALAX_SERIAL,
1882 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1883 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1884 { .driver_data = MT_CLS_EGALAX,
1885 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1886 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1887 { .driver_data = MT_CLS_EGALAX,
1888 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1889 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1890 { .driver_data = MT_CLS_EGALAX_SERIAL,
1891 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1892 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1893 { .driver_data = MT_CLS_EGALAX,
1894 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1895 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1896 { .driver_data = MT_CLS_EGALAX,
1897 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1898 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1899 { .driver_data = MT_CLS_EGALAX,
1900 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1901 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1902 { .driver_data = MT_CLS_EGALAX,
1903 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1904 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1905 { .driver_data = MT_CLS_EGALAX_SERIAL,
1906 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1907 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1908 { .driver_data = MT_CLS_EGALAX_SERIAL,
1909 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1910 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1911 { .driver_data = MT_CLS_EGALAX_SERIAL,
1912 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1913 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1914 { .driver_data = MT_CLS_EGALAX,
1915 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1916 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
1917
1918 /* Elitegroup panel */
1919 { .driver_data = MT_CLS_SERIAL,
1920 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1921 USB_DEVICE_ID_ELITEGROUP_05D8) },
1922
1923 /* Flatfrog Panels */
1924 { .driver_data = MT_CLS_FLATFROG,
1925 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1926 USB_DEVICE_ID_MULTITOUCH_3200) },
1927
1928 /* FocalTech Panels */
1929 { .driver_data = MT_CLS_SERIAL,
1930 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1931 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1932
1933 /* GeneralTouch panel */
1934 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1935 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1936 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1937 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1938 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1939 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1940 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1941 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1942 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1943 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1944 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1945 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1946 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1947 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1948 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1949 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1950 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1951 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1952 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1953 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1954 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1955
1956 /* Gametel game controller */
1957 { .driver_data = MT_CLS_NSMU,
1958 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1959 USB_DEVICE_ID_GAMETEL_MT_MODE) },
1960
1961 /* GoodTouch panels */
1962 { .driver_data = MT_CLS_NSMU,
1963 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1964 USB_DEVICE_ID_GOODTOUCH_000f) },
1965
1966 /* Hanvon panels */
1967 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1968 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1969 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1970
1971 /* Ilitek dual touch panel */
1972 { .driver_data = MT_CLS_NSMU,
1973 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1974 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1975
1976 /* LG Melfas panel */
1977 { .driver_data = MT_CLS_LG,
1978 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1979 USB_DEVICE_ID_LG_MELFAS_MT) },
1980 { .driver_data = MT_CLS_LG,
1981 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
1982 USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
1983
1984 /* MosArt panels */
1985 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1986 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1987 USB_DEVICE_ID_ASUS_T91MT)},
1988 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1989 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1990 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1991 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1992 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1993 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1994
1995 /* Novatek Panel */
1996 { .driver_data = MT_CLS_NSMU,
1997 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1998 USB_DEVICE_ID_NOVATEK_PCT) },
1999
2000 /* Ntrig Panel */
2001 { .driver_data = MT_CLS_NSMU,
2002 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2003 USB_VENDOR_ID_NTRIG, 0x1b05) },
2004
2005 /* Panasonic panels */
2006 { .driver_data = MT_CLS_PANASONIC,
2007 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2008 USB_DEVICE_ID_PANABOARD_UBT780) },
2009 { .driver_data = MT_CLS_PANASONIC,
2010 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2011 USB_DEVICE_ID_PANABOARD_UBT880) },
2012
2013 /* PixArt optical touch screen */
2014 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2015 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2016 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2017 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2018 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2019 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2020 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2021 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2022 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2023
2024 /* PixCir-based panels */
2025 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2026 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2027 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2028
2029 /* Quanta-based panels */
2030 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2031 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2032 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2033
2034 /* Razer touchpads */
2035 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2036 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2037 USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2038
2039 /* Stantum panels */
2040 { .driver_data = MT_CLS_CONFIDENCE,
2041 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2042 USB_DEVICE_ID_MTP_STM)},
2043
2044 /* TopSeed panels */
2045 { .driver_data = MT_CLS_TOPSEED,
2046 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2047 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2048
2049 /* Touch International panels */
2050 { .driver_data = MT_CLS_NSMU,
2051 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2052 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2053
2054 /* Unitec panels */
2055 { .driver_data = MT_CLS_NSMU,
2056 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2057 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2058 { .driver_data = MT_CLS_NSMU,
2059 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2060 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2061
2062 /* VTL panels */
2063 { .driver_data = MT_CLS_VTL,
2064 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2065 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2066
2067 /* Wistron panels */
2068 { .driver_data = MT_CLS_NSMU,
2069 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2070 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2071
2072 /* XAT */
2073 { .driver_data = MT_CLS_NSMU,
2074 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2075 USB_DEVICE_ID_XAT_CSR) },
2076
2077 /* Xiroku */
2078 { .driver_data = MT_CLS_NSMU,
2079 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2080 USB_DEVICE_ID_XIROKU_SPX) },
2081 { .driver_data = MT_CLS_NSMU,
2082 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2083 USB_DEVICE_ID_XIROKU_MPX) },
2084 { .driver_data = MT_CLS_NSMU,
2085 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2086 USB_DEVICE_ID_XIROKU_CSR) },
2087 { .driver_data = MT_CLS_NSMU,
2088 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2089 USB_DEVICE_ID_XIROKU_SPX1) },
2090 { .driver_data = MT_CLS_NSMU,
2091 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2092 USB_DEVICE_ID_XIROKU_MPX1) },
2093 { .driver_data = MT_CLS_NSMU,
2094 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2095 USB_DEVICE_ID_XIROKU_CSR1) },
2096 { .driver_data = MT_CLS_NSMU,
2097 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2098 USB_DEVICE_ID_XIROKU_SPX2) },
2099 { .driver_data = MT_CLS_NSMU,
2100 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2101 USB_DEVICE_ID_XIROKU_MPX2) },
2102 { .driver_data = MT_CLS_NSMU,
2103 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2104 USB_DEVICE_ID_XIROKU_CSR2) },
2105
2106 /* Google MT devices */
2107 { .driver_data = MT_CLS_GOOGLE,
2108 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2109 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2110
2111 /* Generic MT device */
2112 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2113
2114 /* Generic Win 8 certified MT device */
2115 { .driver_data = MT_CLS_WIN_8,
2116 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2117 HID_ANY_ID, HID_ANY_ID) },
2118 { }
2119 };
2120 MODULE_DEVICE_TABLE(hid, mt_devices);
2121
2122 static const struct hid_usage_id mt_grabbed_usages[] = {
2123 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2124 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2125 };
2126
2127 static struct hid_driver mt_driver = {
2128 .name = "hid-multitouch",
2129 .id_table = mt_devices,
2130 .probe = mt_probe,
2131 .remove = mt_remove,
2132 .input_mapping = mt_input_mapping,
2133 .input_mapped = mt_input_mapped,
2134 .input_configured = mt_input_configured,
2135 .feature_mapping = mt_feature_mapping,
2136 .usage_table = mt_grabbed_usages,
2137 .event = mt_event,
2138 .report = mt_report,
2139 #ifdef CONFIG_PM
2140 .reset_resume = mt_reset_resume,
2141 .resume = mt_resume,
2142 #endif
2143 };
2144 module_hid_driver(mt_driver);
2145