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 usage = mt_allocate_usage(hdev, application);
645 if (!usage)
646 return;
647
648 target = (__s32 **)((char *)usage + offset);
649 }
650
651 *target = value;
652 }
653
654 #define MT_STORE_FIELD(__name) \
655 mt_store_field(hdev, app, \
656 &field->value[usage->usage_index], \
657 offsetof(struct mt_usages, __name))
658
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)659 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
660 struct hid_field *field, struct hid_usage *usage,
661 unsigned long **bit, int *max, struct mt_application *app)
662 {
663 struct mt_device *td = hid_get_drvdata(hdev);
664 struct mt_class *cls = &td->mtclass;
665 int code;
666 struct hid_usage *prev_usage = NULL;
667
668 /*
669 * Model touchscreens providing buttons as touchpads.
670 */
671 if (field->application == HID_DG_TOUCHSCREEN &&
672 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
673 app->mt_flags |= INPUT_MT_POINTER;
674 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
675 }
676
677 /* count the buttons on touchpads */
678 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
679 app->buttons_count++;
680
681 if (usage->usage_index)
682 prev_usage = &field->usage[usage->usage_index - 1];
683
684 switch (usage->hid & HID_USAGE_PAGE) {
685
686 case HID_UP_GENDESK:
687 switch (usage->hid) {
688 case HID_GD_X:
689 if (prev_usage && (prev_usage->hid == usage->hid)) {
690 code = ABS_MT_TOOL_X;
691 MT_STORE_FIELD(cx);
692 } else {
693 code = ABS_MT_POSITION_X;
694 MT_STORE_FIELD(x);
695 }
696
697 set_abs(hi->input, code, field, cls->sn_move);
698
699 /*
700 * A system multi-axis that exports X and Y has a high
701 * chance of being used directly on a surface
702 */
703 if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
704 __set_bit(INPUT_PROP_DIRECT,
705 hi->input->propbit);
706 input_set_abs_params(hi->input,
707 ABS_MT_TOOL_TYPE,
708 MT_TOOL_DIAL,
709 MT_TOOL_DIAL, 0, 0);
710 }
711
712 return 1;
713 case HID_GD_Y:
714 if (prev_usage && (prev_usage->hid == usage->hid)) {
715 code = ABS_MT_TOOL_Y;
716 MT_STORE_FIELD(cy);
717 } else {
718 code = ABS_MT_POSITION_Y;
719 MT_STORE_FIELD(y);
720 }
721
722 set_abs(hi->input, code, field, cls->sn_move);
723
724 return 1;
725 }
726 return 0;
727
728 case HID_UP_DIGITIZER:
729 switch (usage->hid) {
730 case HID_DG_INRANGE:
731 if (app->quirks & MT_QUIRK_HOVERING) {
732 input_set_abs_params(hi->input,
733 ABS_MT_DISTANCE, 0, 1, 0, 0);
734 }
735 MT_STORE_FIELD(inrange_state);
736 return 1;
737 case HID_DG_CONFIDENCE:
738 if ((cls->name == MT_CLS_WIN_8 ||
739 cls->name == MT_CLS_WIN_8_DUAL) &&
740 (field->application == HID_DG_TOUCHPAD ||
741 field->application == HID_DG_TOUCHSCREEN))
742 app->quirks |= MT_QUIRK_CONFIDENCE;
743
744 if (app->quirks & MT_QUIRK_CONFIDENCE)
745 input_set_abs_params(hi->input,
746 ABS_MT_TOOL_TYPE,
747 MT_TOOL_FINGER,
748 MT_TOOL_PALM, 0, 0);
749
750 MT_STORE_FIELD(confidence_state);
751 return 1;
752 case HID_DG_TIPSWITCH:
753 if (field->application != HID_GD_SYSTEM_MULTIAXIS)
754 input_set_capability(hi->input,
755 EV_KEY, BTN_TOUCH);
756 MT_STORE_FIELD(tip_state);
757 return 1;
758 case HID_DG_CONTACTID:
759 MT_STORE_FIELD(contactid);
760 app->touches_by_report++;
761 return 1;
762 case HID_DG_WIDTH:
763 if (!(app->quirks & MT_QUIRK_NO_AREA))
764 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
765 cls->sn_width);
766 MT_STORE_FIELD(w);
767 return 1;
768 case HID_DG_HEIGHT:
769 if (!(app->quirks & MT_QUIRK_NO_AREA)) {
770 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
771 cls->sn_height);
772
773 /*
774 * Only set ABS_MT_ORIENTATION if it is not
775 * already set by the HID_DG_AZIMUTH usage.
776 */
777 if (!test_bit(ABS_MT_ORIENTATION,
778 hi->input->absbit))
779 input_set_abs_params(hi->input,
780 ABS_MT_ORIENTATION, 0, 1, 0, 0);
781 }
782 MT_STORE_FIELD(h);
783 return 1;
784 case HID_DG_TIPPRESSURE:
785 set_abs(hi->input, ABS_MT_PRESSURE, field,
786 cls->sn_pressure);
787 MT_STORE_FIELD(p);
788 return 1;
789 case HID_DG_SCANTIME:
790 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
791 app->scantime = &field->value[usage->usage_index];
792 app->scantime_logical_max = field->logical_maximum;
793 return 1;
794 case HID_DG_CONTACTCOUNT:
795 app->have_contact_count = true;
796 app->raw_cc = &field->value[usage->usage_index];
797 return 1;
798 case HID_DG_AZIMUTH:
799 /*
800 * Azimuth has the range of [0, MAX) representing a full
801 * revolution. Set ABS_MT_ORIENTATION to a quarter of
802 * MAX according the definition of ABS_MT_ORIENTATION
803 */
804 input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
805 -field->logical_maximum / 4,
806 field->logical_maximum / 4,
807 cls->sn_move ?
808 field->logical_maximum / cls->sn_move : 0, 0);
809 MT_STORE_FIELD(a);
810 return 1;
811 case HID_DG_CONTACTMAX:
812 /* contact max are global to the report */
813 return -1;
814 case HID_DG_TOUCH:
815 /* Legacy devices use TIPSWITCH and not TOUCH.
816 * Let's just ignore this field. */
817 return -1;
818 }
819 /* let hid-input decide for the others */
820 return 0;
821
822 case HID_UP_BUTTON:
823 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
824 /*
825 * MS PTP spec says that external buttons left and right have
826 * usages 2 and 3.
827 */
828 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
829 field->application == HID_DG_TOUCHPAD &&
830 (usage->hid & HID_USAGE) > 1)
831 code--;
832
833 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
834 code = BTN_0 + ((usage->hid - 1) & HID_USAGE);
835
836 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
837 input_set_capability(hi->input, EV_KEY, code);
838 return 1;
839
840 case 0xff000000:
841 /* we do not want to map these: no input-oriented meaning */
842 return -1;
843 }
844
845 return 0;
846 }
847
mt_compute_slot(struct mt_device * td,struct mt_application * app,struct mt_usages * slot,struct input_dev * input)848 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
849 struct mt_usages *slot,
850 struct input_dev *input)
851 {
852 __s32 quirks = app->quirks;
853
854 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
855 return *slot->contactid;
856
857 if (quirks & MT_QUIRK_CYPRESS)
858 return cypress_compute_slot(app, slot);
859
860 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
861 return app->num_received;
862
863 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
864 return *slot->contactid - 1;
865
866 return input_mt_get_slot_by_key(input, *slot->contactid);
867 }
868
mt_release_pending_palms(struct mt_device * td,struct mt_application * app,struct input_dev * input)869 static void mt_release_pending_palms(struct mt_device *td,
870 struct mt_application *app,
871 struct input_dev *input)
872 {
873 int slotnum;
874 bool need_sync = false;
875
876 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
877 clear_bit(slotnum, app->pending_palm_slots);
878
879 input_mt_slot(input, slotnum);
880 input_mt_report_slot_state(input, MT_TOOL_PALM, false);
881
882 need_sync = true;
883 }
884
885 if (need_sync) {
886 input_mt_sync_frame(input);
887 input_sync(input);
888 }
889 }
890
891 /*
892 * this function is called when a whole packet has been received and processed,
893 * so that it can decide what to send to the input layer.
894 */
mt_sync_frame(struct mt_device * td,struct mt_application * app,struct input_dev * input)895 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
896 struct input_dev *input)
897 {
898 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
899 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
900
901 input_mt_sync_frame(input);
902 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
903 input_sync(input);
904
905 mt_release_pending_palms(td, app, input);
906
907 app->num_received = 0;
908 app->left_button_state = 0;
909
910 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
911 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
912 else
913 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
914 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
915 }
916
mt_compute_timestamp(struct mt_application * app,__s32 value)917 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
918 {
919 long delta = value - app->prev_scantime;
920 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
921
922 app->jiffies = jiffies;
923
924 if (delta < 0)
925 delta += app->scantime_logical_max;
926
927 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
928 delta *= 100;
929
930 if (jdelta > MAX_TIMESTAMP_INTERVAL)
931 /* No data received for a while, resync the timestamp. */
932 return 0;
933 else
934 return app->timestamp + delta;
935 }
936
mt_touch_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)937 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
938 struct hid_usage *usage, __s32 value)
939 {
940 /* we will handle the hidinput part later, now remains hiddev */
941 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
942 hid->hiddev_hid_event(hid, field, usage, value);
943
944 return 1;
945 }
946
mt_process_slot(struct mt_device * td,struct input_dev * input,struct mt_application * app,struct mt_usages * slot)947 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
948 struct mt_application *app,
949 struct mt_usages *slot)
950 {
951 struct input_mt *mt = input->mt;
952 __s32 quirks = app->quirks;
953 bool valid = true;
954 bool confidence_state = true;
955 bool inrange_state = false;
956 int active;
957 int slotnum;
958 int tool = MT_TOOL_FINGER;
959
960 if (!slot)
961 return -EINVAL;
962
963 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
964 app->num_received >= app->num_expected)
965 return -EAGAIN;
966
967 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
968 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
969 valid = *slot->inrange_state;
970 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
971 valid = *slot->tip_state;
972 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
973 valid = *slot->confidence_state;
974
975 if (!valid)
976 return 0;
977 }
978
979 slotnum = mt_compute_slot(td, app, slot, input);
980 if (slotnum < 0 || slotnum >= td->maxcontacts)
981 return 0;
982
983 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
984 struct input_mt_slot *i_slot = &mt->slots[slotnum];
985
986 if (input_mt_is_active(i_slot) &&
987 input_mt_is_used(mt, i_slot))
988 return -EAGAIN;
989 }
990
991 if (quirks & MT_QUIRK_CONFIDENCE)
992 confidence_state = *slot->confidence_state;
993
994 if (quirks & MT_QUIRK_HOVERING)
995 inrange_state = *slot->inrange_state;
996
997 active = *slot->tip_state || inrange_state;
998
999 if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1000 tool = MT_TOOL_DIAL;
1001 else if (unlikely(!confidence_state)) {
1002 tool = MT_TOOL_PALM;
1003 if (!active &&
1004 input_mt_is_active(&mt->slots[slotnum])) {
1005 /*
1006 * The non-confidence was reported for
1007 * previously valid contact that is also no
1008 * longer valid. We can't simply report
1009 * lift-off as userspace will not be aware
1010 * of non-confidence, so we need to split
1011 * it into 2 events: active MT_TOOL_PALM
1012 * and a separate liftoff.
1013 */
1014 active = true;
1015 set_bit(slotnum, app->pending_palm_slots);
1016 }
1017 }
1018
1019 input_mt_slot(input, slotnum);
1020 input_mt_report_slot_state(input, tool, active);
1021 if (active) {
1022 /* this finger is in proximity of the sensor */
1023 int wide = (*slot->w > *slot->h);
1024 int major = max(*slot->w, *slot->h);
1025 int minor = min(*slot->w, *slot->h);
1026 int orientation = wide;
1027 int max_azimuth;
1028 int azimuth;
1029
1030 if (slot->a != DEFAULT_ZERO) {
1031 /*
1032 * Azimuth is counter-clockwise and ranges from [0, MAX)
1033 * (a full revolution). Convert it to clockwise ranging
1034 * [-MAX/2, MAX/2].
1035 *
1036 * Note that ABS_MT_ORIENTATION require us to report
1037 * the limit of [-MAX/4, MAX/4], but the value can go
1038 * out of range to [-MAX/2, MAX/2] to report an upside
1039 * down ellipsis.
1040 */
1041 azimuth = *slot->a;
1042 max_azimuth = input_abs_get_max(input,
1043 ABS_MT_ORIENTATION);
1044 if (azimuth > max_azimuth * 2)
1045 azimuth -= max_azimuth * 4;
1046 orientation = -azimuth;
1047 }
1048
1049 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1050 /*
1051 * divided by two to match visual scale of touch
1052 * for devices with this quirk
1053 */
1054 major = major >> 1;
1055 minor = minor >> 1;
1056 }
1057
1058 input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
1059 input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
1060 input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
1061 input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy);
1062 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1063 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1064 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1065 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1066 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1067
1068 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1069 }
1070
1071 return 0;
1072 }
1073
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)1074 static void mt_process_mt_event(struct hid_device *hid,
1075 struct mt_application *app,
1076 struct hid_field *field,
1077 struct hid_usage *usage,
1078 __s32 value,
1079 bool first_packet)
1080 {
1081 __s32 quirks = app->quirks;
1082 struct input_dev *input = field->hidinput->input;
1083
1084 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1085 return;
1086
1087 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1088
1089 /*
1090 * For Win8 PTP touchpads we should only look at
1091 * non finger/touch events in the first_packet of a
1092 * (possible) multi-packet frame.
1093 */
1094 if (!first_packet)
1095 return;
1096
1097 /*
1098 * For Win8 PTP touchpads we map both the clickpad click
1099 * and any "external" left buttons to BTN_LEFT if a
1100 * device claims to have both we need to report 1 for
1101 * BTN_LEFT if either is pressed, so we or all values
1102 * together and report the result in mt_sync_frame().
1103 */
1104 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1105 app->left_button_state |= value;
1106 return;
1107 }
1108 }
1109
1110 input_event(input, usage->type, usage->code, value);
1111 }
1112
mt_touch_report(struct hid_device * hid,struct mt_report_data * rdata)1113 static void mt_touch_report(struct hid_device *hid,
1114 struct mt_report_data *rdata)
1115 {
1116 struct mt_device *td = hid_get_drvdata(hid);
1117 struct hid_report *report = rdata->report;
1118 struct mt_application *app = rdata->application;
1119 struct hid_field *field;
1120 struct input_dev *input;
1121 struct mt_usages *slot;
1122 bool first_packet;
1123 unsigned count;
1124 int r, n;
1125 int scantime = 0;
1126 int contact_count = -1;
1127
1128 /* sticky fingers release in progress, abort */
1129 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1130 return;
1131
1132 scantime = *app->scantime;
1133 app->timestamp = mt_compute_timestamp(app, scantime);
1134 if (app->raw_cc != DEFAULT_ZERO)
1135 contact_count = *app->raw_cc;
1136
1137 /*
1138 * Includes multi-packet support where subsequent
1139 * packets are sent with zero contactcount.
1140 */
1141 if (contact_count >= 0) {
1142 /*
1143 * For Win8 PTPs the first packet (td->num_received == 0) may
1144 * have a contactcount of 0 if there only is a button event.
1145 * We double check that this is not a continuation packet
1146 * of a possible multi-packet frame be checking that the
1147 * timestamp has changed.
1148 */
1149 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1150 app->num_received == 0 &&
1151 app->prev_scantime != scantime)
1152 app->num_expected = contact_count;
1153 /* A non 0 contact count always indicates a first packet */
1154 else if (contact_count)
1155 app->num_expected = contact_count;
1156 }
1157 app->prev_scantime = scantime;
1158
1159 first_packet = app->num_received == 0;
1160
1161 input = report->field[0]->hidinput->input;
1162
1163 list_for_each_entry(slot, &app->mt_usages, list) {
1164 if (!mt_process_slot(td, input, app, slot))
1165 app->num_received++;
1166 }
1167
1168 for (r = 0; r < report->maxfield; r++) {
1169 field = report->field[r];
1170 count = field->report_count;
1171
1172 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1173 continue;
1174
1175 for (n = 0; n < count; n++)
1176 mt_process_mt_event(hid, app, field,
1177 &field->usage[n], field->value[n],
1178 first_packet);
1179 }
1180
1181 if (app->num_received >= app->num_expected)
1182 mt_sync_frame(td, app, input);
1183
1184 /*
1185 * Windows 8 specs says 2 things:
1186 * - once a contact has been reported, it has to be reported in each
1187 * subsequent report
1188 * - the report rate when fingers are present has to be at least
1189 * the refresh rate of the screen, 60 or 120 Hz
1190 *
1191 * I interprete this that the specification forces a report rate of
1192 * at least 60 Hz for a touchscreen to be certified.
1193 * Which means that if we do not get a report whithin 16 ms, either
1194 * something wrong happens, either the touchscreen forgets to send
1195 * a release. Taking a reasonable margin allows to remove issues
1196 * with USB communication or the load of the machine.
1197 *
1198 * Given that Win 8 devices are forced to send a release, this will
1199 * only affect laggish machines and the ones that have a firmware
1200 * defect.
1201 */
1202 if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1203 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1204 mod_timer(&td->release_timer,
1205 jiffies + msecs_to_jiffies(100));
1206 else
1207 del_timer(&td->release_timer);
1208 }
1209
1210 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1211 }
1212
mt_touch_input_configured(struct hid_device * hdev,struct hid_input * hi,struct mt_application * app)1213 static int mt_touch_input_configured(struct hid_device *hdev,
1214 struct hid_input *hi,
1215 struct mt_application *app)
1216 {
1217 struct mt_device *td = hid_get_drvdata(hdev);
1218 struct mt_class *cls = &td->mtclass;
1219 struct input_dev *input = hi->input;
1220 int ret;
1221
1222 if (!td->maxcontacts)
1223 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1224
1225 mt_post_parse(td, app);
1226 if (td->serial_maybe)
1227 mt_post_parse_default_settings(td, app);
1228
1229 if (cls->is_indirect)
1230 app->mt_flags |= INPUT_MT_POINTER;
1231
1232 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1233 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1234
1235 /* check for clickpads */
1236 if ((app->mt_flags & INPUT_MT_POINTER) &&
1237 (app->buttons_count == 1))
1238 td->is_buttonpad = true;
1239
1240 if (td->is_buttonpad)
1241 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1242
1243 app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1244 BITS_TO_LONGS(td->maxcontacts),
1245 sizeof(long),
1246 GFP_KERNEL);
1247 if (!app->pending_palm_slots)
1248 return -ENOMEM;
1249
1250 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1251 if (ret)
1252 return ret;
1253
1254 app->mt_flags = 0;
1255 return 0;
1256 }
1257
1258 #define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1259 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)1260 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1261 struct hid_field *field, struct hid_usage *usage,
1262 unsigned long **bit, int *max)
1263 {
1264 struct mt_device *td = hid_get_drvdata(hdev);
1265 struct mt_application *application;
1266 struct mt_report_data *rdata;
1267
1268 rdata = mt_find_report_data(td, field->report);
1269 if (!rdata) {
1270 hid_err(hdev, "failed to allocate data for report\n");
1271 return 0;
1272 }
1273
1274 application = rdata->application;
1275
1276 /*
1277 * If mtclass.export_all_inputs is not set, only map fields from
1278 * TouchScreen or TouchPad collections. We need to ignore fields
1279 * that belong to other collections such as Mouse that might have
1280 * the same GenericDesktop usages.
1281 */
1282 if (!td->mtclass.export_all_inputs &&
1283 field->application != HID_DG_TOUCHSCREEN &&
1284 field->application != HID_DG_PEN &&
1285 field->application != HID_DG_TOUCHPAD &&
1286 field->application != HID_GD_KEYBOARD &&
1287 field->application != HID_GD_SYSTEM_CONTROL &&
1288 field->application != HID_CP_CONSUMER_CONTROL &&
1289 field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1290 field->application != HID_GD_SYSTEM_MULTIAXIS &&
1291 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1292 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1293 return -1;
1294
1295 /*
1296 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1297 * touchpad report descriptor. We need to treat these as an array to
1298 * map usages to input keys.
1299 */
1300 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1301 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1302 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1303 set_bit(EV_REP, hi->input->evbit);
1304 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1305 field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1306 switch (usage->hid & HID_USAGE) {
1307 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
1308 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
1309 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
1310 case 0x6b: mt_map_key_clear(KEY_F21); break;
1311 case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
1312 default:
1313 return -1;
1314 }
1315 return 1;
1316 }
1317
1318 if (rdata->is_mt_collection)
1319 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1320 application);
1321
1322 /* let hid-core decide for the others */
1323 return 0;
1324 }
1325
mt_input_mapped(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)1326 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1327 struct hid_field *field, struct hid_usage *usage,
1328 unsigned long **bit, int *max)
1329 {
1330 struct mt_device *td = hid_get_drvdata(hdev);
1331 struct mt_report_data *rdata;
1332
1333 rdata = mt_find_report_data(td, field->report);
1334 if (rdata && rdata->is_mt_collection) {
1335 /* We own these mappings, tell hid-input to ignore them */
1336 return -1;
1337 }
1338
1339 /* let hid-core decide for the others */
1340 return 0;
1341 }
1342
mt_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1343 static int mt_event(struct hid_device *hid, struct hid_field *field,
1344 struct hid_usage *usage, __s32 value)
1345 {
1346 struct mt_device *td = hid_get_drvdata(hid);
1347 struct mt_report_data *rdata;
1348
1349 rdata = mt_find_report_data(td, field->report);
1350 if (rdata && rdata->is_mt_collection)
1351 return mt_touch_event(hid, field, usage, value);
1352
1353 return 0;
1354 }
1355
mt_report(struct hid_device * hid,struct hid_report * report)1356 static void mt_report(struct hid_device *hid, struct hid_report *report)
1357 {
1358 struct mt_device *td = hid_get_drvdata(hid);
1359 struct hid_field *field = report->field[0];
1360 struct mt_report_data *rdata;
1361
1362 if (!(hid->claimed & HID_CLAIMED_INPUT))
1363 return;
1364
1365 rdata = mt_find_report_data(td, report);
1366 if (rdata && rdata->is_mt_collection)
1367 return mt_touch_report(hid, rdata);
1368
1369 if (field && field->hidinput && field->hidinput->input)
1370 input_sync(field->hidinput->input);
1371 }
1372
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)1373 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1374 struct hid_field *field,
1375 struct hid_usage *usage,
1376 enum latency_mode latency,
1377 bool surface_switch,
1378 bool button_switch,
1379 bool *inputmode_found)
1380 {
1381 struct mt_device *td = hid_get_drvdata(hdev);
1382 struct mt_class *cls = &td->mtclass;
1383 struct hid_report *report = field->report;
1384 unsigned int index = usage->usage_index;
1385 char *buf;
1386 u32 report_len;
1387 int max;
1388
1389 switch (usage->hid) {
1390 case HID_DG_INPUTMODE:
1391 /*
1392 * Some elan panels wrongly declare 2 input mode features,
1393 * and silently ignore when we set the value in the second
1394 * field. Skip the second feature and hope for the best.
1395 */
1396 if (*inputmode_found)
1397 return false;
1398
1399 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1400 report_len = hid_report_len(report);
1401 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1402 if (!buf) {
1403 hid_err(hdev,
1404 "failed to allocate buffer for report\n");
1405 return false;
1406 }
1407 hid_hw_raw_request(hdev, report->id, buf, report_len,
1408 HID_FEATURE_REPORT,
1409 HID_REQ_GET_REPORT);
1410 kfree(buf);
1411 }
1412
1413 field->value[index] = td->inputmode_value;
1414 *inputmode_found = true;
1415 return true;
1416
1417 case HID_DG_CONTACTMAX:
1418 if (cls->maxcontacts) {
1419 max = min_t(int, field->logical_maximum,
1420 cls->maxcontacts);
1421 if (field->value[index] != max) {
1422 field->value[index] = max;
1423 return true;
1424 }
1425 }
1426 break;
1427
1428 case HID_DG_LATENCYMODE:
1429 field->value[index] = latency;
1430 return true;
1431
1432 case HID_DG_SURFACESWITCH:
1433 field->value[index] = surface_switch;
1434 return true;
1435
1436 case HID_DG_BUTTONSWITCH:
1437 field->value[index] = button_switch;
1438 return true;
1439 }
1440
1441 return false; /* no need to update the report */
1442 }
1443
mt_set_modes(struct hid_device * hdev,enum latency_mode latency,bool surface_switch,bool button_switch)1444 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1445 bool surface_switch, bool button_switch)
1446 {
1447 struct hid_report_enum *rep_enum;
1448 struct hid_report *rep;
1449 struct hid_usage *usage;
1450 int i, j;
1451 bool update_report;
1452 bool inputmode_found = false;
1453
1454 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1455 list_for_each_entry(rep, &rep_enum->report_list, list) {
1456 update_report = false;
1457
1458 for (i = 0; i < rep->maxfield; i++) {
1459 /* Ignore if report count is out of bounds. */
1460 if (rep->field[i]->report_count < 1)
1461 continue;
1462
1463 for (j = 0; j < rep->field[i]->maxusage; j++) {
1464 usage = &rep->field[i]->usage[j];
1465
1466 if (mt_need_to_apply_feature(hdev,
1467 rep->field[i],
1468 usage,
1469 latency,
1470 surface_switch,
1471 button_switch,
1472 &inputmode_found))
1473 update_report = true;
1474 }
1475 }
1476
1477 if (update_report)
1478 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1479 }
1480 }
1481
mt_post_parse_default_settings(struct mt_device * td,struct mt_application * app)1482 static void mt_post_parse_default_settings(struct mt_device *td,
1483 struct mt_application *app)
1484 {
1485 __s32 quirks = app->quirks;
1486
1487 /* unknown serial device needs special quirks */
1488 if (list_is_singular(&app->mt_usages)) {
1489 quirks |= MT_QUIRK_ALWAYS_VALID;
1490 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1491 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1492 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1493 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1494 }
1495
1496 app->quirks = quirks;
1497 }
1498
mt_post_parse(struct mt_device * td,struct mt_application * app)1499 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1500 {
1501 if (!app->have_contact_count)
1502 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1503 }
1504
mt_input_configured(struct hid_device * hdev,struct hid_input * hi)1505 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1506 {
1507 struct mt_device *td = hid_get_drvdata(hdev);
1508 char *name;
1509 const char *suffix = NULL;
1510 unsigned int application = 0;
1511 struct mt_report_data *rdata;
1512 struct mt_application *mt_application = NULL;
1513 struct hid_report *report;
1514 int ret;
1515
1516 list_for_each_entry(report, &hi->reports, hidinput_list) {
1517 application = report->application;
1518 rdata = mt_find_report_data(td, report);
1519 if (!rdata) {
1520 hid_err(hdev, "failed to allocate data for report\n");
1521 return -ENOMEM;
1522 }
1523
1524 mt_application = rdata->application;
1525
1526 if (rdata->is_mt_collection) {
1527 ret = mt_touch_input_configured(hdev, hi,
1528 mt_application);
1529 if (ret)
1530 return ret;
1531 }
1532
1533 /*
1534 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1535 * for the stylus. Check this first, and then rely on
1536 * the application field.
1537 */
1538 if (report->field[0]->physical == HID_DG_STYLUS) {
1539 suffix = "Pen";
1540 /* force BTN_STYLUS to allow tablet matching in udev */
1541 __set_bit(BTN_STYLUS, hi->input->keybit);
1542 }
1543 }
1544
1545 if (!suffix) {
1546 switch (application) {
1547 case HID_GD_KEYBOARD:
1548 case HID_GD_KEYPAD:
1549 case HID_GD_MOUSE:
1550 case HID_DG_TOUCHPAD:
1551 case HID_GD_SYSTEM_CONTROL:
1552 case HID_CP_CONSUMER_CONTROL:
1553 case HID_GD_WIRELESS_RADIO_CTLS:
1554 case HID_GD_SYSTEM_MULTIAXIS:
1555 /* already handled by hid core */
1556 break;
1557 case HID_DG_TOUCHSCREEN:
1558 /* we do not set suffix = "Touchscreen" */
1559 hi->input->name = hdev->name;
1560 break;
1561 case HID_DG_STYLUS:
1562 /* force BTN_STYLUS to allow tablet matching in udev */
1563 __set_bit(BTN_STYLUS, hi->input->keybit);
1564 break;
1565 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1566 suffix = "Custom Media Keys";
1567 break;
1568 default:
1569 suffix = "UNKNOWN";
1570 break;
1571 }
1572 }
1573
1574 if (suffix) {
1575 name = devm_kzalloc(&hi->input->dev,
1576 strlen(hdev->name) + strlen(suffix) + 2,
1577 GFP_KERNEL);
1578 if (name) {
1579 sprintf(name, "%s %s", hdev->name, suffix);
1580 hi->input->name = name;
1581 }
1582 }
1583
1584 return 0;
1585 }
1586
mt_fix_const_field(struct hid_field * field,unsigned int usage)1587 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1588 {
1589 if (field->usage[0].hid != usage ||
1590 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1591 return;
1592
1593 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1594 field->flags |= HID_MAIN_ITEM_VARIABLE;
1595 }
1596
mt_fix_const_fields(struct hid_device * hdev,unsigned int usage)1597 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1598 {
1599 struct hid_report *report;
1600 int i;
1601
1602 list_for_each_entry(report,
1603 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1604 list) {
1605
1606 if (!report->maxfield)
1607 continue;
1608
1609 for (i = 0; i < report->maxfield; i++)
1610 if (report->field[i]->maxusage >= 1)
1611 mt_fix_const_field(report->field[i], usage);
1612 }
1613 }
1614
mt_release_contacts(struct hid_device * hid)1615 static void mt_release_contacts(struct hid_device *hid)
1616 {
1617 struct hid_input *hidinput;
1618 struct mt_application *application;
1619 struct mt_device *td = hid_get_drvdata(hid);
1620
1621 list_for_each_entry(hidinput, &hid->inputs, list) {
1622 struct input_dev *input_dev = hidinput->input;
1623 struct input_mt *mt = input_dev->mt;
1624 int i;
1625
1626 if (mt) {
1627 for (i = 0; i < mt->num_slots; i++) {
1628 input_mt_slot(input_dev, i);
1629 input_mt_report_slot_state(input_dev,
1630 MT_TOOL_FINGER,
1631 false);
1632 }
1633 input_mt_sync_frame(input_dev);
1634 input_sync(input_dev);
1635 }
1636 }
1637
1638 list_for_each_entry(application, &td->applications, list) {
1639 application->num_received = 0;
1640 }
1641 }
1642
mt_expired_timeout(struct timer_list * t)1643 static void mt_expired_timeout(struct timer_list *t)
1644 {
1645 struct mt_device *td = from_timer(td, t, release_timer);
1646 struct hid_device *hdev = td->hdev;
1647
1648 /*
1649 * An input report came in just before we release the sticky fingers,
1650 * it will take care of the sticky fingers.
1651 */
1652 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1653 return;
1654 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1655 mt_release_contacts(hdev);
1656 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1657 }
1658
mt_probe(struct hid_device * hdev,const struct hid_device_id * id)1659 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1660 {
1661 int ret, i;
1662 struct mt_device *td;
1663 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1664
1665 for (i = 0; mt_classes[i].name ; i++) {
1666 if (id->driver_data == mt_classes[i].name) {
1667 mtclass = &(mt_classes[i]);
1668 break;
1669 }
1670 }
1671
1672 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1673 if (!td) {
1674 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1675 return -ENOMEM;
1676 }
1677 td->hdev = hdev;
1678 td->mtclass = *mtclass;
1679 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1680 hid_set_drvdata(hdev, td);
1681
1682 INIT_LIST_HEAD(&td->applications);
1683 INIT_LIST_HEAD(&td->reports);
1684
1685 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1686 td->serial_maybe = true;
1687
1688 /* This allows the driver to correctly support devices
1689 * that emit events over several HID messages.
1690 */
1691 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1692
1693 /*
1694 * This allows the driver to handle different input sensors
1695 * that emits events through different applications on the same HID
1696 * device.
1697 */
1698 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1699
1700 if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1701 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1702
1703 timer_setup(&td->release_timer, mt_expired_timeout, 0);
1704
1705 ret = hid_parse(hdev);
1706 if (ret != 0)
1707 return ret;
1708
1709 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1710 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1711
1712 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1713 if (ret)
1714 return ret;
1715
1716 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1717 if (ret)
1718 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1719 hdev->name);
1720
1721 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1722
1723 return 0;
1724 }
1725
1726 #ifdef CONFIG_PM
mt_reset_resume(struct hid_device * hdev)1727 static int mt_reset_resume(struct hid_device *hdev)
1728 {
1729 mt_release_contacts(hdev);
1730 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1731 return 0;
1732 }
1733
mt_resume(struct hid_device * hdev)1734 static int mt_resume(struct hid_device *hdev)
1735 {
1736 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1737 * It should be safe to send it to other devices too.
1738 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1739
1740 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1741
1742 return 0;
1743 }
1744 #endif
1745
mt_remove(struct hid_device * hdev)1746 static void mt_remove(struct hid_device *hdev)
1747 {
1748 struct mt_device *td = hid_get_drvdata(hdev);
1749
1750 del_timer_sync(&td->release_timer);
1751
1752 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1753 hid_hw_stop(hdev);
1754 }
1755
1756 /*
1757 * This list contains only:
1758 * - VID/PID of products not working with the default multitouch handling
1759 * - 2 generic rules.
1760 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1761 */
1762 static const struct hid_device_id mt_devices[] = {
1763
1764 /* 3M panels */
1765 { .driver_data = MT_CLS_3M,
1766 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1767 USB_DEVICE_ID_3M1968) },
1768 { .driver_data = MT_CLS_3M,
1769 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1770 USB_DEVICE_ID_3M2256) },
1771 { .driver_data = MT_CLS_3M,
1772 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1773 USB_DEVICE_ID_3M3266) },
1774
1775 /* Alps devices */
1776 { .driver_data = MT_CLS_WIN_8_DUAL,
1777 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1778 USB_VENDOR_ID_ALPS_JP,
1779 HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
1780 { .driver_data = MT_CLS_WIN_8_DUAL,
1781 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1782 USB_VENDOR_ID_ALPS_JP,
1783 HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
1784
1785 /* Lenovo X1 TAB Gen 2 */
1786 { .driver_data = MT_CLS_WIN_8_DUAL,
1787 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1788 USB_VENDOR_ID_LENOVO,
1789 USB_DEVICE_ID_LENOVO_X1_TAB) },
1790
1791 /* Anton devices */
1792 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1793 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1794 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1795
1796 /* Asus T304UA */
1797 { .driver_data = MT_CLS_ASUS,
1798 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1799 USB_VENDOR_ID_ASUSTEK,
1800 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1801
1802 /* Atmel panels */
1803 { .driver_data = MT_CLS_SERIAL,
1804 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1805 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1806
1807 /* Baanto multitouch devices */
1808 { .driver_data = MT_CLS_NSMU,
1809 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1810 USB_DEVICE_ID_BAANTO_MT_190W2) },
1811
1812 /* Cando panels */
1813 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1814 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1815 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1816 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1817 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1818 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1819
1820 /* Chunghwa Telecom touch panels */
1821 { .driver_data = MT_CLS_NSMU,
1822 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1823 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1824
1825 /* CJTouch panels */
1826 { .driver_data = MT_CLS_NSMU,
1827 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1828 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1829 { .driver_data = MT_CLS_NSMU,
1830 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1831 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1832
1833 /* CVTouch panels */
1834 { .driver_data = MT_CLS_NSMU,
1835 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1836 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1837
1838 /* eGalax devices (resistive) */
1839 { .driver_data = MT_CLS_EGALAX,
1840 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1841 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1842 { .driver_data = MT_CLS_EGALAX,
1843 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1844 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1845
1846 /* eGalax devices (capacitive) */
1847 { .driver_data = MT_CLS_EGALAX_SERIAL,
1848 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1849 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1850 { .driver_data = MT_CLS_EGALAX,
1851 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1852 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1853 { .driver_data = MT_CLS_EGALAX_SERIAL,
1854 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1855 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1856 { .driver_data = MT_CLS_EGALAX_SERIAL,
1857 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1858 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1859 { .driver_data = MT_CLS_EGALAX_SERIAL,
1860 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1861 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1862 { .driver_data = MT_CLS_EGALAX_SERIAL,
1863 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1864 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1865 { .driver_data = MT_CLS_EGALAX,
1866 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1867 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1868 { .driver_data = MT_CLS_EGALAX,
1869 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1870 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1871 { .driver_data = MT_CLS_EGALAX_SERIAL,
1872 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1873 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1874 { .driver_data = MT_CLS_EGALAX,
1875 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1876 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1877 { .driver_data = MT_CLS_EGALAX,
1878 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1879 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1880 { .driver_data = MT_CLS_EGALAX,
1881 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1882 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1883 { .driver_data = MT_CLS_EGALAX,
1884 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1885 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1886 { .driver_data = MT_CLS_EGALAX_SERIAL,
1887 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1888 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1889 { .driver_data = MT_CLS_EGALAX_SERIAL,
1890 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1891 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1892 { .driver_data = MT_CLS_EGALAX_SERIAL,
1893 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1894 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1895
1896 /* Elitegroup panel */
1897 { .driver_data = MT_CLS_SERIAL,
1898 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1899 USB_DEVICE_ID_ELITEGROUP_05D8) },
1900
1901 /* Flatfrog Panels */
1902 { .driver_data = MT_CLS_FLATFROG,
1903 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1904 USB_DEVICE_ID_MULTITOUCH_3200) },
1905
1906 /* FocalTech Panels */
1907 { .driver_data = MT_CLS_SERIAL,
1908 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1909 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1910
1911 /* GeneralTouch panel */
1912 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1913 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1914 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1915 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1916 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1917 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1918 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1919 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1920 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1921 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1922 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1923 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1924 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1925 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1926 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1927 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1928 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1929 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1930 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1931 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1932 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1933
1934 /* Gametel game controller */
1935 { .driver_data = MT_CLS_NSMU,
1936 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1937 USB_DEVICE_ID_GAMETEL_MT_MODE) },
1938
1939 /* GoodTouch panels */
1940 { .driver_data = MT_CLS_NSMU,
1941 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1942 USB_DEVICE_ID_GOODTOUCH_000f) },
1943
1944 /* Hanvon panels */
1945 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1946 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1947 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1948
1949 /* Ilitek dual touch panel */
1950 { .driver_data = MT_CLS_NSMU,
1951 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1952 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1953
1954 /* LG Melfas panel */
1955 { .driver_data = MT_CLS_LG,
1956 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1957 USB_DEVICE_ID_LG_MELFAS_MT) },
1958
1959 /* MosArt panels */
1960 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1961 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1962 USB_DEVICE_ID_ASUS_T91MT)},
1963 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1964 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1965 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1966 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1967 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1968 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1969
1970 /* Novatek Panel */
1971 { .driver_data = MT_CLS_NSMU,
1972 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1973 USB_DEVICE_ID_NOVATEK_PCT) },
1974
1975 /* Ntrig Panel */
1976 { .driver_data = MT_CLS_NSMU,
1977 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1978 USB_VENDOR_ID_NTRIG, 0x1b05) },
1979
1980 /* Panasonic panels */
1981 { .driver_data = MT_CLS_PANASONIC,
1982 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1983 USB_DEVICE_ID_PANABOARD_UBT780) },
1984 { .driver_data = MT_CLS_PANASONIC,
1985 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1986 USB_DEVICE_ID_PANABOARD_UBT880) },
1987
1988 /* PixArt optical touch screen */
1989 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1990 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1991 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1992 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1993 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1994 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1995 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1996 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1997 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1998
1999 /* PixCir-based panels */
2000 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2001 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2002 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2003
2004 /* Quanta-based panels */
2005 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2006 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2007 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2008
2009 /* Razer touchpads */
2010 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2011 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2012 USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2013
2014 /* Stantum panels */
2015 { .driver_data = MT_CLS_CONFIDENCE,
2016 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2017 USB_DEVICE_ID_MTP_STM)},
2018
2019 /* TopSeed panels */
2020 { .driver_data = MT_CLS_TOPSEED,
2021 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2022 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2023
2024 /* Touch International panels */
2025 { .driver_data = MT_CLS_NSMU,
2026 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2027 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2028
2029 /* Unitec panels */
2030 { .driver_data = MT_CLS_NSMU,
2031 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2032 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2033 { .driver_data = MT_CLS_NSMU,
2034 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2035 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2036
2037 /* VTL panels */
2038 { .driver_data = MT_CLS_VTL,
2039 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2040 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2041
2042 /* Wistron panels */
2043 { .driver_data = MT_CLS_NSMU,
2044 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2045 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2046
2047 /* XAT */
2048 { .driver_data = MT_CLS_NSMU,
2049 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2050 USB_DEVICE_ID_XAT_CSR) },
2051
2052 /* Xiroku */
2053 { .driver_data = MT_CLS_NSMU,
2054 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2055 USB_DEVICE_ID_XIROKU_SPX) },
2056 { .driver_data = MT_CLS_NSMU,
2057 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2058 USB_DEVICE_ID_XIROKU_MPX) },
2059 { .driver_data = MT_CLS_NSMU,
2060 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2061 USB_DEVICE_ID_XIROKU_CSR) },
2062 { .driver_data = MT_CLS_NSMU,
2063 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2064 USB_DEVICE_ID_XIROKU_SPX1) },
2065 { .driver_data = MT_CLS_NSMU,
2066 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2067 USB_DEVICE_ID_XIROKU_MPX1) },
2068 { .driver_data = MT_CLS_NSMU,
2069 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2070 USB_DEVICE_ID_XIROKU_CSR1) },
2071 { .driver_data = MT_CLS_NSMU,
2072 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2073 USB_DEVICE_ID_XIROKU_SPX2) },
2074 { .driver_data = MT_CLS_NSMU,
2075 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2076 USB_DEVICE_ID_XIROKU_MPX2) },
2077 { .driver_data = MT_CLS_NSMU,
2078 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2079 USB_DEVICE_ID_XIROKU_CSR2) },
2080
2081 /* Google MT devices */
2082 { .driver_data = MT_CLS_GOOGLE,
2083 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2084 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2085
2086 /* Generic MT device */
2087 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2088
2089 /* Generic Win 8 certified MT device */
2090 { .driver_data = MT_CLS_WIN_8,
2091 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2092 HID_ANY_ID, HID_ANY_ID) },
2093 { }
2094 };
2095 MODULE_DEVICE_TABLE(hid, mt_devices);
2096
2097 static const struct hid_usage_id mt_grabbed_usages[] = {
2098 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2099 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2100 };
2101
2102 static struct hid_driver mt_driver = {
2103 .name = "hid-multitouch",
2104 .id_table = mt_devices,
2105 .probe = mt_probe,
2106 .remove = mt_remove,
2107 .input_mapping = mt_input_mapping,
2108 .input_mapped = mt_input_mapped,
2109 .input_configured = mt_input_configured,
2110 .feature_mapping = mt_feature_mapping,
2111 .usage_table = mt_grabbed_usages,
2112 .event = mt_event,
2113 .report = mt_report,
2114 #ifdef CONFIG_PM
2115 .reset_resume = mt_reset_resume,
2116 .resume = mt_resume,
2117 #endif
2118 };
2119 module_hid_driver(mt_driver);
2120
