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[thirdparty/linux.git] / drivers / hid / hid-multitouch.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * HID driver for multitouch panels
4 *
5 * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
6 * Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
7 * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
8 * Copyright (c) 2012-2013 Red Hat, Inc
9 *
10 * This code is partly based on hid-egalax.c:
11 *
12 * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
13 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
14 * Copyright (c) 2010 Canonical, Ltd.
15 *
16 * This code is partly based on hid-3m-pct.c:
17 *
18 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
19 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
20 * Copyright (c) 2010 Canonical, Ltd.
21 */
22
23 /*
24 */
25
26 /*
27 * This driver is regularly tested thanks to the test suite in hid-tools[1].
28 * Please run these regression tests before patching this module so that
29 * your patch won't break existing known devices.
30 *
31 * [1] https://gitlab.freedesktop.org/libevdev/hid-tools
32 */
33
34 #include <linux/device.h>
35 #include <linux/hid.h>
36 #include <linux/module.h>
37 #include <linux/slab.h>
38 #include <linux/input/mt.h>
39 #include <linux/jiffies.h>
40 #include <linux/string.h>
41 #include <linux/timer.h>
42
43
44 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
45 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
46 MODULE_DESCRIPTION("HID multitouch panels");
47 MODULE_LICENSE("GPL");
48
49 #include "hid-ids.h"
50
51 /* quirks to control the device */
52 #define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0)
53 #define MT_QUIRK_SLOT_IS_CONTACTID BIT(1)
54 #define MT_QUIRK_CYPRESS BIT(2)
55 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER BIT(3)
56 #define MT_QUIRK_ALWAYS_VALID BIT(4)
57 #define MT_QUIRK_VALID_IS_INRANGE BIT(5)
58 #define MT_QUIRK_VALID_IS_CONFIDENCE BIT(6)
59 #define MT_QUIRK_CONFIDENCE BIT(7)
60 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE BIT(8)
61 #define MT_QUIRK_NO_AREA BIT(9)
62 #define MT_QUIRK_IGNORE_DUPLICATES BIT(10)
63 #define MT_QUIRK_HOVERING BIT(11)
64 #define MT_QUIRK_CONTACT_CNT_ACCURATE BIT(12)
65 #define MT_QUIRK_FORCE_GET_FEATURE BIT(13)
66 #define MT_QUIRK_FIX_CONST_CONTACT_ID BIT(14)
67 #define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15)
68 #define MT_QUIRK_STICKY_FINGERS BIT(16)
69 #define MT_QUIRK_ASUS_CUSTOM_UP BIT(17)
70 #define MT_QUIRK_WIN8_PTP_BUTTONS BIT(18)
71 #define MT_QUIRK_SEPARATE_APP_REPORT BIT(19)
72
73 #define MT_INPUTMODE_TOUCHSCREEN 0x02
74 #define MT_INPUTMODE_TOUCHPAD 0x03
75
76 #define MT_BUTTONTYPE_CLICKPAD 0
77
78 enum latency_mode {
79 HID_LATENCY_NORMAL = 0,
80 HID_LATENCY_HIGH = 1,
81 };
82
83 #define MT_IO_FLAGS_RUNNING 0
84 #define MT_IO_FLAGS_ACTIVE_SLOTS 1
85 #define MT_IO_FLAGS_PENDING_SLOTS 2
86
87 static const bool mtrue = true; /* default for true */
88 static const bool mfalse; /* default for false */
89 static const __s32 mzero; /* default for 0 */
90
91 #define DEFAULT_TRUE ((void *)&mtrue)
92 #define DEFAULT_FALSE ((void *)&mfalse)
93 #define DEFAULT_ZERO ((void *)&mzero)
94
95 struct mt_usages {
96 struct list_head list;
97 __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
98 __s32 *contactid; /* the device ContactID assigned to this slot */
99 bool *tip_state; /* is the touch valid? */
100 bool *inrange_state; /* is the finger in proximity of the sensor? */
101 bool *confidence_state; /* is the touch made by a finger? */
102 };
103
104 struct mt_application {
105 struct list_head list;
106 unsigned int application;
107 unsigned int report_id;
108 struct list_head mt_usages; /* mt usages list */
109
110 __s32 quirks;
111
112 __s32 *scantime; /* scantime reported */
113 __s32 scantime_logical_max; /* max value for raw scantime */
114
115 __s32 *raw_cc; /* contact count in the report */
116 int left_button_state; /* left button state */
117 unsigned int mt_flags; /* flags to pass to input-mt */
118
119 unsigned long *pending_palm_slots; /* slots where we reported palm
120 * and need to release */
121
122 __u8 num_received; /* how many contacts we received */
123 __u8 num_expected; /* expected last contact index */
124 __u8 buttons_count; /* number of physical buttons per touchpad */
125 __u8 touches_by_report; /* how many touches are present in one report:
126 * 1 means we should use a serial protocol
127 * > 1 means hybrid (multitouch) protocol
128 */
129
130 __s32 dev_time; /* the scan time provided by the device */
131 unsigned long jiffies; /* the frame's jiffies */
132 int timestamp; /* the timestamp to be sent */
133 int prev_scantime; /* scantime reported previously */
134
135 bool have_contact_count;
136 };
137
138 struct mt_class {
139 __s32 name; /* MT_CLS */
140 __s32 quirks;
141 __s32 sn_move; /* Signal/noise ratio for move events */
142 __s32 sn_width; /* Signal/noise ratio for width events */
143 __s32 sn_height; /* Signal/noise ratio for height events */
144 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
145 __u8 maxcontacts;
146 bool is_indirect; /* true for touchpads */
147 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
148 };
149
150 struct mt_report_data {
151 struct list_head list;
152 struct hid_report *report;
153 struct mt_application *application;
154 bool is_mt_collection;
155 };
156
157 struct mt_device {
158 struct mt_class mtclass; /* our mt device class */
159 struct timer_list release_timer; /* to release sticky fingers */
160 struct hid_device *hdev; /* hid_device we're attached to */
161 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
162 __u8 inputmode_value; /* InputMode HID feature value */
163 __u8 maxcontacts;
164 bool is_buttonpad; /* is this device a button pad? */
165 bool serial_maybe; /* need to check for serial protocol */
166
167 struct list_head applications;
168 struct list_head reports;
169 };
170
171 static void mt_post_parse_default_settings(struct mt_device *td,
172 struct mt_application *app);
173 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
174
175 /* classes of device behavior */
176 #define MT_CLS_DEFAULT 0x0001
177
178 #define MT_CLS_SERIAL 0x0002
179 #define MT_CLS_CONFIDENCE 0x0003
180 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
181 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
182 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
183 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
184 /* reserved 0x0008 */
185 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
186 #define MT_CLS_NSMU 0x000a
187 /* reserved 0x0010 */
188 /* reserved 0x0011 */
189 #define MT_CLS_WIN_8 0x0012
190 #define MT_CLS_EXPORT_ALL_INPUTS 0x0013
191 #define MT_CLS_WIN_8_DUAL 0x0014
192
193 /* vendor specific classes */
194 #define MT_CLS_3M 0x0101
195 /* reserved 0x0102 */
196 #define MT_CLS_EGALAX 0x0103
197 #define MT_CLS_EGALAX_SERIAL 0x0104
198 #define MT_CLS_TOPSEED 0x0105
199 #define MT_CLS_PANASONIC 0x0106
200 #define MT_CLS_FLATFROG 0x0107
201 #define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
202 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
203 #define MT_CLS_LG 0x010a
204 #define MT_CLS_ASUS 0x010b
205 #define MT_CLS_VTL 0x0110
206 #define MT_CLS_GOOGLE 0x0111
207 #define MT_CLS_RAZER_BLADE_STEALTH 0x0112
208 #define MT_CLS_SMART_TECH 0x0113
209
210 #define MT_DEFAULT_MAXCONTACT 10
211 #define MT_MAX_MAXCONTACT 250
212
213 /*
214 * Resync device and local timestamps after that many microseconds without
215 * receiving data.
216 */
217 #define MAX_TIMESTAMP_INTERVAL 1000000
218
219 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
220 #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
221
222 /*
223 * these device-dependent functions determine what slot corresponds
224 * to a valid contact that was just read.
225 */
226
227 static int cypress_compute_slot(struct mt_application *application,
228 struct mt_usages *slot)
229 {
230 if (*slot->contactid != 0 || application->num_received == 0)
231 return *slot->contactid;
232 else
233 return -1;
234 }
235
236 static const struct mt_class mt_classes[] = {
237 { .name = MT_CLS_DEFAULT,
238 .quirks = MT_QUIRK_ALWAYS_VALID |
239 MT_QUIRK_CONTACT_CNT_ACCURATE },
240 { .name = MT_CLS_NSMU,
241 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
242 { .name = MT_CLS_SERIAL,
243 .quirks = MT_QUIRK_ALWAYS_VALID},
244 { .name = MT_CLS_CONFIDENCE,
245 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
246 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
247 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
248 MT_QUIRK_SLOT_IS_CONTACTID },
249 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
250 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
251 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
252 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
253 .quirks = MT_QUIRK_VALID_IS_INRANGE |
254 MT_QUIRK_SLOT_IS_CONTACTID,
255 .maxcontacts = 2 },
256 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
257 .quirks = MT_QUIRK_VALID_IS_INRANGE |
258 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
259 .maxcontacts = 2 },
260 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
261 .quirks = MT_QUIRK_VALID_IS_INRANGE |
262 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
263 { .name = MT_CLS_WIN_8,
264 .quirks = MT_QUIRK_ALWAYS_VALID |
265 MT_QUIRK_IGNORE_DUPLICATES |
266 MT_QUIRK_HOVERING |
267 MT_QUIRK_CONTACT_CNT_ACCURATE |
268 MT_QUIRK_STICKY_FINGERS |
269 MT_QUIRK_WIN8_PTP_BUTTONS,
270 .export_all_inputs = true },
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 { .name = MT_CLS_SMART_TECH,
361 .quirks = MT_QUIRK_ALWAYS_VALID |
362 MT_QUIRK_IGNORE_DUPLICATES |
363 MT_QUIRK_CONTACT_CNT_ACCURATE |
364 MT_QUIRK_SEPARATE_APP_REPORT,
365 },
366 { }
367 };
368
369 static ssize_t mt_show_quirks(struct device *dev,
370 struct device_attribute *attr,
371 char *buf)
372 {
373 struct hid_device *hdev = to_hid_device(dev);
374 struct mt_device *td = hid_get_drvdata(hdev);
375
376 return sprintf(buf, "%u\n", td->mtclass.quirks);
377 }
378
379 static ssize_t mt_set_quirks(struct device *dev,
380 struct device_attribute *attr,
381 const char *buf, size_t count)
382 {
383 struct hid_device *hdev = to_hid_device(dev);
384 struct mt_device *td = hid_get_drvdata(hdev);
385 struct mt_application *application;
386
387 unsigned long val;
388
389 if (kstrtoul(buf, 0, &val))
390 return -EINVAL;
391
392 td->mtclass.quirks = val;
393
394 list_for_each_entry(application, &td->applications, list) {
395 application->quirks = val;
396 if (!application->have_contact_count)
397 application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
398 }
399
400 return count;
401 }
402
403 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
404
405 static struct attribute *sysfs_attrs[] = {
406 &dev_attr_quirks.attr,
407 NULL
408 };
409
410 static const struct attribute_group mt_attribute_group = {
411 .attrs = sysfs_attrs
412 };
413
414 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
415 {
416 int ret;
417 u32 size = hid_report_len(report);
418 u8 *buf;
419
420 /*
421 * Do not fetch the feature report if the device has been explicitly
422 * marked as non-capable.
423 */
424 if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
425 return;
426
427 buf = hid_alloc_report_buf(report, GFP_KERNEL);
428 if (!buf)
429 return;
430
431 ret = hid_hw_raw_request(hdev, report->id, buf, size,
432 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
433 if (ret < 0) {
434 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
435 report->id);
436 } else {
437 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
438 size, 0);
439 if (ret)
440 dev_warn(&hdev->dev, "failed to report feature\n");
441 }
442
443 kfree(buf);
444 }
445
446 static void mt_feature_mapping(struct hid_device *hdev,
447 struct hid_field *field, struct hid_usage *usage)
448 {
449 struct mt_device *td = hid_get_drvdata(hdev);
450
451 switch (usage->hid) {
452 case HID_DG_CONTACTMAX:
453 mt_get_feature(hdev, field->report);
454
455 td->maxcontacts = field->value[0];
456 if (!td->maxcontacts &&
457 field->logical_maximum <= MT_MAX_MAXCONTACT)
458 td->maxcontacts = field->logical_maximum;
459 if (td->mtclass.maxcontacts)
460 /* check if the maxcontacts is given by the class */
461 td->maxcontacts = td->mtclass.maxcontacts;
462
463 break;
464 case HID_DG_BUTTONTYPE:
465 if (usage->usage_index >= field->report_count) {
466 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
467 break;
468 }
469
470 mt_get_feature(hdev, field->report);
471 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
472 td->is_buttonpad = true;
473
474 break;
475 case 0xff0000c5:
476 /* Retrieve the Win8 blob once to enable some devices */
477 if (usage->usage_index == 0)
478 mt_get_feature(hdev, field->report);
479 break;
480 }
481 }
482
483 static void set_abs(struct input_dev *input, unsigned int code,
484 struct hid_field *field, int snratio)
485 {
486 int fmin = field->logical_minimum;
487 int fmax = field->logical_maximum;
488 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
489 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
490 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
491 }
492
493 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
494 struct mt_application *application)
495 {
496 struct mt_usages *usage;
497
498 usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
499 if (!usage)
500 return NULL;
501
502 /* set some defaults so we do not need to check for null pointers */
503 usage->x = DEFAULT_ZERO;
504 usage->y = DEFAULT_ZERO;
505 usage->cx = DEFAULT_ZERO;
506 usage->cy = DEFAULT_ZERO;
507 usage->p = DEFAULT_ZERO;
508 usage->w = DEFAULT_ZERO;
509 usage->h = DEFAULT_ZERO;
510 usage->a = DEFAULT_ZERO;
511 usage->contactid = DEFAULT_ZERO;
512 usage->tip_state = DEFAULT_FALSE;
513 usage->inrange_state = DEFAULT_FALSE;
514 usage->confidence_state = DEFAULT_TRUE;
515
516 list_add_tail(&usage->list, &application->mt_usages);
517
518 return usage;
519 }
520
521 static struct mt_application *mt_allocate_application(struct mt_device *td,
522 struct hid_report *report)
523 {
524 unsigned int application = report->application;
525 struct mt_application *mt_application;
526
527 mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
528 GFP_KERNEL);
529 if (!mt_application)
530 return NULL;
531
532 mt_application->application = application;
533 INIT_LIST_HEAD(&mt_application->mt_usages);
534
535 if (application == HID_DG_TOUCHSCREEN)
536 mt_application->mt_flags |= INPUT_MT_DIRECT;
537
538 /*
539 * Model touchscreens providing buttons as touchpads.
540 */
541 if (application == HID_DG_TOUCHPAD) {
542 mt_application->mt_flags |= INPUT_MT_POINTER;
543 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
544 }
545
546 mt_application->scantime = DEFAULT_ZERO;
547 mt_application->raw_cc = DEFAULT_ZERO;
548 mt_application->quirks = td->mtclass.quirks;
549 mt_application->report_id = report->id;
550
551 list_add_tail(&mt_application->list, &td->applications);
552
553 return mt_application;
554 }
555
556 static struct mt_application *mt_find_application(struct mt_device *td,
557 struct hid_report *report)
558 {
559 unsigned int application = report->application;
560 struct mt_application *tmp, *mt_application = NULL;
561
562 list_for_each_entry(tmp, &td->applications, list) {
563 if (application == tmp->application) {
564 if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
565 tmp->report_id == report->id) {
566 mt_application = tmp;
567 break;
568 }
569 }
570 }
571
572 if (!mt_application)
573 mt_application = mt_allocate_application(td, report);
574
575 return mt_application;
576 }
577
578 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
579 struct hid_report *report)
580 {
581 struct mt_report_data *rdata;
582 struct hid_field *field;
583 int r, n;
584
585 rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
586 if (!rdata)
587 return NULL;
588
589 rdata->report = report;
590 rdata->application = mt_find_application(td, report);
591
592 if (!rdata->application) {
593 devm_kfree(&td->hdev->dev, rdata);
594 return NULL;
595 }
596
597 for (r = 0; r < report->maxfield; r++) {
598 field = report->field[r];
599
600 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
601 continue;
602
603 for (n = 0; n < field->report_count; n++) {
604 if (field->usage[n].hid == HID_DG_CONTACTID)
605 rdata->is_mt_collection = true;
606 }
607 }
608
609 list_add_tail(&rdata->list, &td->reports);
610
611 return rdata;
612 }
613
614 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
615 struct hid_report *report)
616 {
617 struct mt_report_data *tmp, *rdata = NULL;
618
619 list_for_each_entry(tmp, &td->reports, list) {
620 if (report == tmp->report) {
621 rdata = tmp;
622 break;
623 }
624 }
625
626 if (!rdata)
627 rdata = mt_allocate_report_data(td, report);
628
629 return rdata;
630 }
631
632 static void mt_store_field(struct hid_device *hdev,
633 struct mt_application *application,
634 __s32 *value,
635 size_t offset)
636 {
637 struct mt_usages *usage;
638 __s32 **target;
639
640 if (list_empty(&application->mt_usages))
641 usage = mt_allocate_usage(hdev, application);
642 else
643 usage = list_last_entry(&application->mt_usages,
644 struct mt_usages,
645 list);
646
647 if (!usage)
648 return;
649
650 target = (__s32 **)((char *)usage + offset);
651
652 /* the value has already been filled, create a new slot */
653 if (*target != DEFAULT_TRUE &&
654 *target != DEFAULT_FALSE &&
655 *target != DEFAULT_ZERO) {
656 if (usage->contactid == DEFAULT_ZERO ||
657 usage->x == DEFAULT_ZERO ||
658 usage->y == DEFAULT_ZERO) {
659 hid_dbg(hdev,
660 "ignoring duplicate usage on incomplete");
661 return;
662 }
663 usage = mt_allocate_usage(hdev, application);
664 if (!usage)
665 return;
666
667 target = (__s32 **)((char *)usage + offset);
668 }
669
670 *target = value;
671 }
672
673 #define MT_STORE_FIELD(__name) \
674 mt_store_field(hdev, app, \
675 &field->value[usage->usage_index], \
676 offsetof(struct mt_usages, __name))
677
678 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
679 struct hid_field *field, struct hid_usage *usage,
680 unsigned long **bit, int *max, struct mt_application *app)
681 {
682 struct mt_device *td = hid_get_drvdata(hdev);
683 struct mt_class *cls = &td->mtclass;
684 int code;
685 struct hid_usage *prev_usage = NULL;
686
687 /*
688 * Model touchscreens providing buttons as touchpads.
689 */
690 if (field->application == HID_DG_TOUCHSCREEN &&
691 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
692 app->mt_flags |= INPUT_MT_POINTER;
693 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
694 }
695
696 /* count the buttons on touchpads */
697 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
698 app->buttons_count++;
699
700 if (usage->usage_index)
701 prev_usage = &field->usage[usage->usage_index - 1];
702
703 switch (usage->hid & HID_USAGE_PAGE) {
704
705 case HID_UP_GENDESK:
706 switch (usage->hid) {
707 case HID_GD_X:
708 if (prev_usage && (prev_usage->hid == usage->hid)) {
709 code = ABS_MT_TOOL_X;
710 MT_STORE_FIELD(cx);
711 } else {
712 code = ABS_MT_POSITION_X;
713 MT_STORE_FIELD(x);
714 }
715
716 set_abs(hi->input, code, field, cls->sn_move);
717
718 /*
719 * A system multi-axis that exports X and Y has a high
720 * chance of being used directly on a surface
721 */
722 if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
723 __set_bit(INPUT_PROP_DIRECT,
724 hi->input->propbit);
725 input_set_abs_params(hi->input,
726 ABS_MT_TOOL_TYPE,
727 MT_TOOL_DIAL,
728 MT_TOOL_DIAL, 0, 0);
729 }
730
731 return 1;
732 case HID_GD_Y:
733 if (prev_usage && (prev_usage->hid == usage->hid)) {
734 code = ABS_MT_TOOL_Y;
735 MT_STORE_FIELD(cy);
736 } else {
737 code = ABS_MT_POSITION_Y;
738 MT_STORE_FIELD(y);
739 }
740
741 set_abs(hi->input, code, field, cls->sn_move);
742
743 return 1;
744 }
745 return 0;
746
747 case HID_UP_DIGITIZER:
748 switch (usage->hid) {
749 case HID_DG_INRANGE:
750 if (app->quirks & MT_QUIRK_HOVERING) {
751 input_set_abs_params(hi->input,
752 ABS_MT_DISTANCE, 0, 1, 0, 0);
753 }
754 MT_STORE_FIELD(inrange_state);
755 return 1;
756 case HID_DG_CONFIDENCE:
757 if ((cls->name == MT_CLS_WIN_8 ||
758 cls->name == MT_CLS_WIN_8_DUAL) &&
759 (field->application == HID_DG_TOUCHPAD ||
760 field->application == HID_DG_TOUCHSCREEN))
761 app->quirks |= MT_QUIRK_CONFIDENCE;
762
763 if (app->quirks & MT_QUIRK_CONFIDENCE)
764 input_set_abs_params(hi->input,
765 ABS_MT_TOOL_TYPE,
766 MT_TOOL_FINGER,
767 MT_TOOL_PALM, 0, 0);
768
769 MT_STORE_FIELD(confidence_state);
770 return 1;
771 case HID_DG_TIPSWITCH:
772 if (field->application != HID_GD_SYSTEM_MULTIAXIS)
773 input_set_capability(hi->input,
774 EV_KEY, BTN_TOUCH);
775 MT_STORE_FIELD(tip_state);
776 return 1;
777 case HID_DG_CONTACTID:
778 MT_STORE_FIELD(contactid);
779 app->touches_by_report++;
780 return 1;
781 case HID_DG_WIDTH:
782 if (!(app->quirks & MT_QUIRK_NO_AREA))
783 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
784 cls->sn_width);
785 MT_STORE_FIELD(w);
786 return 1;
787 case HID_DG_HEIGHT:
788 if (!(app->quirks & MT_QUIRK_NO_AREA)) {
789 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
790 cls->sn_height);
791
792 /*
793 * Only set ABS_MT_ORIENTATION if it is not
794 * already set by the HID_DG_AZIMUTH usage.
795 */
796 if (!test_bit(ABS_MT_ORIENTATION,
797 hi->input->absbit))
798 input_set_abs_params(hi->input,
799 ABS_MT_ORIENTATION, 0, 1, 0, 0);
800 }
801 MT_STORE_FIELD(h);
802 return 1;
803 case HID_DG_TIPPRESSURE:
804 set_abs(hi->input, ABS_MT_PRESSURE, field,
805 cls->sn_pressure);
806 MT_STORE_FIELD(p);
807 return 1;
808 case HID_DG_SCANTIME:
809 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
810 app->scantime = &field->value[usage->usage_index];
811 app->scantime_logical_max = field->logical_maximum;
812 return 1;
813 case HID_DG_CONTACTCOUNT:
814 app->have_contact_count = true;
815 app->raw_cc = &field->value[usage->usage_index];
816 return 1;
817 case HID_DG_AZIMUTH:
818 /*
819 * Azimuth has the range of [0, MAX) representing a full
820 * revolution. Set ABS_MT_ORIENTATION to a quarter of
821 * MAX according the definition of ABS_MT_ORIENTATION
822 */
823 input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
824 -field->logical_maximum / 4,
825 field->logical_maximum / 4,
826 cls->sn_move ?
827 field->logical_maximum / cls->sn_move : 0, 0);
828 MT_STORE_FIELD(a);
829 return 1;
830 case HID_DG_CONTACTMAX:
831 /* contact max are global to the report */
832 return -1;
833 case HID_DG_TOUCH:
834 /* Legacy devices use TIPSWITCH and not TOUCH.
835 * Let's just ignore this field. */
836 return -1;
837 }
838 /* let hid-input decide for the others */
839 return 0;
840
841 case HID_UP_BUTTON:
842 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
843 /*
844 * MS PTP spec says that external buttons left and right have
845 * usages 2 and 3.
846 */
847 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
848 field->application == HID_DG_TOUCHPAD &&
849 (usage->hid & HID_USAGE) > 1)
850 code--;
851
852 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
853 code = BTN_0 + ((usage->hid - 1) & HID_USAGE);
854
855 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
856 input_set_capability(hi->input, EV_KEY, code);
857 return 1;
858
859 case 0xff000000:
860 /* we do not want to map these: no input-oriented meaning */
861 return -1;
862 }
863
864 return 0;
865 }
866
867 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
868 struct mt_usages *slot,
869 struct input_dev *input)
870 {
871 __s32 quirks = app->quirks;
872
873 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
874 return *slot->contactid;
875
876 if (quirks & MT_QUIRK_CYPRESS)
877 return cypress_compute_slot(app, slot);
878
879 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
880 return app->num_received;
881
882 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
883 return *slot->contactid - 1;
884
885 return input_mt_get_slot_by_key(input, *slot->contactid);
886 }
887
888 static void mt_release_pending_palms(struct mt_device *td,
889 struct mt_application *app,
890 struct input_dev *input)
891 {
892 int slotnum;
893 bool need_sync = false;
894
895 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
896 clear_bit(slotnum, app->pending_palm_slots);
897
898 input_mt_slot(input, slotnum);
899 input_mt_report_slot_state(input, MT_TOOL_PALM, false);
900
901 need_sync = true;
902 }
903
904 if (need_sync) {
905 input_mt_sync_frame(input);
906 input_sync(input);
907 }
908 }
909
910 /*
911 * this function is called when a whole packet has been received and processed,
912 * so that it can decide what to send to the input layer.
913 */
914 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
915 struct input_dev *input)
916 {
917 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
918 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
919
920 input_mt_sync_frame(input);
921 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
922 input_sync(input);
923
924 mt_release_pending_palms(td, app, input);
925
926 app->num_received = 0;
927 app->left_button_state = 0;
928
929 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
930 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
931 else
932 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
933 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
934 }
935
936 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
937 {
938 long delta = value - app->prev_scantime;
939 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
940
941 app->jiffies = jiffies;
942
943 if (delta < 0)
944 delta += app->scantime_logical_max;
945
946 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
947 delta *= 100;
948
949 if (jdelta > MAX_TIMESTAMP_INTERVAL)
950 /* No data received for a while, resync the timestamp. */
951 return 0;
952 else
953 return app->timestamp + delta;
954 }
955
956 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
957 struct hid_usage *usage, __s32 value)
958 {
959 /* we will handle the hidinput part later, now remains hiddev */
960 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
961 hid->hiddev_hid_event(hid, field, usage, value);
962
963 return 1;
964 }
965
966 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
967 struct mt_application *app,
968 struct mt_usages *slot)
969 {
970 struct input_mt *mt = input->mt;
971 __s32 quirks = app->quirks;
972 bool valid = true;
973 bool confidence_state = true;
974 bool inrange_state = false;
975 int active;
976 int slotnum;
977 int tool = MT_TOOL_FINGER;
978
979 if (!slot)
980 return -EINVAL;
981
982 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
983 app->num_received >= app->num_expected)
984 return -EAGAIN;
985
986 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
987 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
988 valid = *slot->inrange_state;
989 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
990 valid = *slot->tip_state;
991 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
992 valid = *slot->confidence_state;
993
994 if (!valid)
995 return 0;
996 }
997
998 slotnum = mt_compute_slot(td, app, slot, input);
999 if (slotnum < 0 || slotnum >= td->maxcontacts)
1000 return 0;
1001
1002 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1003 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1004
1005 if (input_mt_is_active(i_slot) &&
1006 input_mt_is_used(mt, i_slot))
1007 return -EAGAIN;
1008 }
1009
1010 if (quirks & MT_QUIRK_CONFIDENCE)
1011 confidence_state = *slot->confidence_state;
1012
1013 if (quirks & MT_QUIRK_HOVERING)
1014 inrange_state = *slot->inrange_state;
1015
1016 active = *slot->tip_state || inrange_state;
1017
1018 if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1019 tool = MT_TOOL_DIAL;
1020 else if (unlikely(!confidence_state)) {
1021 tool = MT_TOOL_PALM;
1022 if (!active && mt &&
1023 input_mt_is_active(&mt->slots[slotnum])) {
1024 /*
1025 * The non-confidence was reported for
1026 * previously valid contact that is also no
1027 * longer valid. We can't simply report
1028 * lift-off as userspace will not be aware
1029 * of non-confidence, so we need to split
1030 * it into 2 events: active MT_TOOL_PALM
1031 * and a separate liftoff.
1032 */
1033 active = true;
1034 set_bit(slotnum, app->pending_palm_slots);
1035 }
1036 }
1037
1038 input_mt_slot(input, slotnum);
1039 input_mt_report_slot_state(input, tool, active);
1040 if (active) {
1041 /* this finger is in proximity of the sensor */
1042 int wide = (*slot->w > *slot->h);
1043 int major = max(*slot->w, *slot->h);
1044 int minor = min(*slot->w, *slot->h);
1045 int orientation = wide;
1046 int max_azimuth;
1047 int azimuth;
1048
1049 if (slot->a != DEFAULT_ZERO) {
1050 /*
1051 * Azimuth is counter-clockwise and ranges from [0, MAX)
1052 * (a full revolution). Convert it to clockwise ranging
1053 * [-MAX/2, MAX/2].
1054 *
1055 * Note that ABS_MT_ORIENTATION require us to report
1056 * the limit of [-MAX/4, MAX/4], but the value can go
1057 * out of range to [-MAX/2, MAX/2] to report an upside
1058 * down ellipsis.
1059 */
1060 azimuth = *slot->a;
1061 max_azimuth = input_abs_get_max(input,
1062 ABS_MT_ORIENTATION);
1063 if (azimuth > max_azimuth * 2)
1064 azimuth -= max_azimuth * 4;
1065 orientation = -azimuth;
1066 }
1067
1068 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1069 /*
1070 * divided by two to match visual scale of touch
1071 * for devices with this quirk
1072 */
1073 major = major >> 1;
1074 minor = minor >> 1;
1075 }
1076
1077 input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
1078 input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
1079 input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
1080 input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy);
1081 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1082 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1083 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1084 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1085 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1086
1087 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1088 }
1089
1090 return 0;
1091 }
1092
1093 static void mt_process_mt_event(struct hid_device *hid,
1094 struct mt_application *app,
1095 struct hid_field *field,
1096 struct hid_usage *usage,
1097 __s32 value,
1098 bool first_packet)
1099 {
1100 __s32 quirks = app->quirks;
1101 struct input_dev *input = field->hidinput->input;
1102
1103 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1104 return;
1105
1106 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1107
1108 /*
1109 * For Win8 PTP touchpads we should only look at
1110 * non finger/touch events in the first_packet of a
1111 * (possible) multi-packet frame.
1112 */
1113 if (!first_packet)
1114 return;
1115
1116 /*
1117 * For Win8 PTP touchpads we map both the clickpad click
1118 * and any "external" left buttons to BTN_LEFT if a
1119 * device claims to have both we need to report 1 for
1120 * BTN_LEFT if either is pressed, so we or all values
1121 * together and report the result in mt_sync_frame().
1122 */
1123 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1124 app->left_button_state |= value;
1125 return;
1126 }
1127 }
1128
1129 input_event(input, usage->type, usage->code, value);
1130 }
1131
1132 static void mt_touch_report(struct hid_device *hid,
1133 struct mt_report_data *rdata)
1134 {
1135 struct mt_device *td = hid_get_drvdata(hid);
1136 struct hid_report *report = rdata->report;
1137 struct mt_application *app = rdata->application;
1138 struct hid_field *field;
1139 struct input_dev *input;
1140 struct mt_usages *slot;
1141 bool first_packet;
1142 unsigned count;
1143 int r, n;
1144 int scantime = 0;
1145 int contact_count = -1;
1146
1147 /* sticky fingers release in progress, abort */
1148 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1149 return;
1150
1151 scantime = *app->scantime;
1152 app->timestamp = mt_compute_timestamp(app, scantime);
1153 if (app->raw_cc != DEFAULT_ZERO)
1154 contact_count = *app->raw_cc;
1155
1156 /*
1157 * Includes multi-packet support where subsequent
1158 * packets are sent with zero contactcount.
1159 */
1160 if (contact_count >= 0) {
1161 /*
1162 * For Win8 PTPs the first packet (td->num_received == 0) may
1163 * have a contactcount of 0 if there only is a button event.
1164 * We double check that this is not a continuation packet
1165 * of a possible multi-packet frame be checking that the
1166 * timestamp has changed.
1167 */
1168 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1169 app->num_received == 0 &&
1170 app->prev_scantime != scantime)
1171 app->num_expected = contact_count;
1172 /* A non 0 contact count always indicates a first packet */
1173 else if (contact_count)
1174 app->num_expected = contact_count;
1175 }
1176 app->prev_scantime = scantime;
1177
1178 first_packet = app->num_received == 0;
1179
1180 input = report->field[0]->hidinput->input;
1181
1182 list_for_each_entry(slot, &app->mt_usages, list) {
1183 if (!mt_process_slot(td, input, app, slot))
1184 app->num_received++;
1185 }
1186
1187 for (r = 0; r < report->maxfield; r++) {
1188 field = report->field[r];
1189 count = field->report_count;
1190
1191 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1192 continue;
1193
1194 for (n = 0; n < count; n++)
1195 mt_process_mt_event(hid, app, field,
1196 &field->usage[n], field->value[n],
1197 first_packet);
1198 }
1199
1200 if (app->num_received >= app->num_expected)
1201 mt_sync_frame(td, app, input);
1202
1203 /*
1204 * Windows 8 specs says 2 things:
1205 * - once a contact has been reported, it has to be reported in each
1206 * subsequent report
1207 * - the report rate when fingers are present has to be at least
1208 * the refresh rate of the screen, 60 or 120 Hz
1209 *
1210 * I interprete this that the specification forces a report rate of
1211 * at least 60 Hz for a touchscreen to be certified.
1212 * Which means that if we do not get a report whithin 16 ms, either
1213 * something wrong happens, either the touchscreen forgets to send
1214 * a release. Taking a reasonable margin allows to remove issues
1215 * with USB communication or the load of the machine.
1216 *
1217 * Given that Win 8 devices are forced to send a release, this will
1218 * only affect laggish machines and the ones that have a firmware
1219 * defect.
1220 */
1221 if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1222 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1223 mod_timer(&td->release_timer,
1224 jiffies + msecs_to_jiffies(100));
1225 else
1226 del_timer(&td->release_timer);
1227 }
1228
1229 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1230 }
1231
1232 static int mt_touch_input_configured(struct hid_device *hdev,
1233 struct hid_input *hi,
1234 struct mt_application *app)
1235 {
1236 struct mt_device *td = hid_get_drvdata(hdev);
1237 struct mt_class *cls = &td->mtclass;
1238 struct input_dev *input = hi->input;
1239 int ret;
1240
1241 if (!td->maxcontacts)
1242 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1243
1244 mt_post_parse(td, app);
1245 if (td->serial_maybe)
1246 mt_post_parse_default_settings(td, app);
1247
1248 if (cls->is_indirect)
1249 app->mt_flags |= INPUT_MT_POINTER;
1250
1251 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1252 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1253
1254 /* check for clickpads */
1255 if ((app->mt_flags & INPUT_MT_POINTER) &&
1256 (app->buttons_count == 1))
1257 td->is_buttonpad = true;
1258
1259 if (td->is_buttonpad)
1260 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1261
1262 app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1263 BITS_TO_LONGS(td->maxcontacts),
1264 sizeof(long),
1265 GFP_KERNEL);
1266 if (!app->pending_palm_slots)
1267 return -ENOMEM;
1268
1269 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1270 if (ret)
1271 return ret;
1272
1273 app->mt_flags = 0;
1274 return 0;
1275 }
1276
1277 #define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1278 max, EV_KEY, (c))
1279 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1280 struct hid_field *field, struct hid_usage *usage,
1281 unsigned long **bit, int *max)
1282 {
1283 struct mt_device *td = hid_get_drvdata(hdev);
1284 struct mt_application *application;
1285 struct mt_report_data *rdata;
1286
1287 rdata = mt_find_report_data(td, field->report);
1288 if (!rdata) {
1289 hid_err(hdev, "failed to allocate data for report\n");
1290 return 0;
1291 }
1292
1293 application = rdata->application;
1294
1295 /*
1296 * If mtclass.export_all_inputs is not set, only map fields from
1297 * TouchScreen or TouchPad collections. We need to ignore fields
1298 * that belong to other collections such as Mouse that might have
1299 * the same GenericDesktop usages.
1300 */
1301 if (!td->mtclass.export_all_inputs &&
1302 field->application != HID_DG_TOUCHSCREEN &&
1303 field->application != HID_DG_PEN &&
1304 field->application != HID_DG_TOUCHPAD &&
1305 field->application != HID_GD_KEYBOARD &&
1306 field->application != HID_GD_SYSTEM_CONTROL &&
1307 field->application != HID_CP_CONSUMER_CONTROL &&
1308 field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1309 field->application != HID_GD_SYSTEM_MULTIAXIS &&
1310 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1311 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1312 return -1;
1313
1314 /*
1315 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1316 * touchpad report descriptor. We need to treat these as an array to
1317 * map usages to input keys.
1318 */
1319 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1320 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1321 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1322 set_bit(EV_REP, hi->input->evbit);
1323 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1324 field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1325 switch (usage->hid & HID_USAGE) {
1326 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
1327 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
1328 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
1329 case 0x6b: mt_map_key_clear(KEY_F21); break;
1330 case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
1331 default:
1332 return -1;
1333 }
1334 return 1;
1335 }
1336
1337 if (rdata->is_mt_collection)
1338 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1339 application);
1340
1341 /*
1342 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1343 * for the stylus. Overwrite the hid_input application
1344 */
1345 if (field->physical == HID_DG_STYLUS)
1346 hi->application = HID_DG_STYLUS;
1347
1348 /* let hid-core decide for the others */
1349 return 0;
1350 }
1351
1352 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1353 struct hid_field *field, struct hid_usage *usage,
1354 unsigned long **bit, int *max)
1355 {
1356 struct mt_device *td = hid_get_drvdata(hdev);
1357 struct mt_report_data *rdata;
1358
1359 rdata = mt_find_report_data(td, field->report);
1360 if (rdata && rdata->is_mt_collection) {
1361 /* We own these mappings, tell hid-input to ignore them */
1362 return -1;
1363 }
1364
1365 /* let hid-core decide for the others */
1366 return 0;
1367 }
1368
1369 static int mt_event(struct hid_device *hid, struct hid_field *field,
1370 struct hid_usage *usage, __s32 value)
1371 {
1372 struct mt_device *td = hid_get_drvdata(hid);
1373 struct mt_report_data *rdata;
1374
1375 rdata = mt_find_report_data(td, field->report);
1376 if (rdata && rdata->is_mt_collection)
1377 return mt_touch_event(hid, field, usage, value);
1378
1379 return 0;
1380 }
1381
1382 static void mt_report(struct hid_device *hid, struct hid_report *report)
1383 {
1384 struct mt_device *td = hid_get_drvdata(hid);
1385 struct hid_field *field = report->field[0];
1386 struct mt_report_data *rdata;
1387
1388 if (!(hid->claimed & HID_CLAIMED_INPUT))
1389 return;
1390
1391 rdata = mt_find_report_data(td, report);
1392 if (rdata && rdata->is_mt_collection)
1393 return mt_touch_report(hid, rdata);
1394
1395 if (field && field->hidinput && field->hidinput->input)
1396 input_sync(field->hidinput->input);
1397 }
1398
1399 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1400 struct hid_field *field,
1401 struct hid_usage *usage,
1402 enum latency_mode latency,
1403 bool surface_switch,
1404 bool button_switch,
1405 bool *inputmode_found)
1406 {
1407 struct mt_device *td = hid_get_drvdata(hdev);
1408 struct mt_class *cls = &td->mtclass;
1409 struct hid_report *report = field->report;
1410 unsigned int index = usage->usage_index;
1411 char *buf;
1412 u32 report_len;
1413 int max;
1414
1415 switch (usage->hid) {
1416 case HID_DG_INPUTMODE:
1417 /*
1418 * Some elan panels wrongly declare 2 input mode features,
1419 * and silently ignore when we set the value in the second
1420 * field. Skip the second feature and hope for the best.
1421 */
1422 if (*inputmode_found)
1423 return false;
1424
1425 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1426 report_len = hid_report_len(report);
1427 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1428 if (!buf) {
1429 hid_err(hdev,
1430 "failed to allocate buffer for report\n");
1431 return false;
1432 }
1433 hid_hw_raw_request(hdev, report->id, buf, report_len,
1434 HID_FEATURE_REPORT,
1435 HID_REQ_GET_REPORT);
1436 kfree(buf);
1437 }
1438
1439 field->value[index] = td->inputmode_value;
1440 *inputmode_found = true;
1441 return true;
1442
1443 case HID_DG_CONTACTMAX:
1444 if (cls->maxcontacts) {
1445 max = min_t(int, field->logical_maximum,
1446 cls->maxcontacts);
1447 if (field->value[index] != max) {
1448 field->value[index] = max;
1449 return true;
1450 }
1451 }
1452 break;
1453
1454 case HID_DG_LATENCYMODE:
1455 field->value[index] = latency;
1456 return true;
1457
1458 case HID_DG_SURFACESWITCH:
1459 field->value[index] = surface_switch;
1460 return true;
1461
1462 case HID_DG_BUTTONSWITCH:
1463 field->value[index] = button_switch;
1464 return true;
1465 }
1466
1467 return false; /* no need to update the report */
1468 }
1469
1470 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1471 bool surface_switch, bool button_switch)
1472 {
1473 struct hid_report_enum *rep_enum;
1474 struct hid_report *rep;
1475 struct hid_usage *usage;
1476 int i, j;
1477 bool update_report;
1478 bool inputmode_found = false;
1479
1480 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1481 list_for_each_entry(rep, &rep_enum->report_list, list) {
1482 update_report = false;
1483
1484 for (i = 0; i < rep->maxfield; i++) {
1485 /* Ignore if report count is out of bounds. */
1486 if (rep->field[i]->report_count < 1)
1487 continue;
1488
1489 for (j = 0; j < rep->field[i]->maxusage; j++) {
1490 usage = &rep->field[i]->usage[j];
1491
1492 if (mt_need_to_apply_feature(hdev,
1493 rep->field[i],
1494 usage,
1495 latency,
1496 surface_switch,
1497 button_switch,
1498 &inputmode_found))
1499 update_report = true;
1500 }
1501 }
1502
1503 if (update_report)
1504 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1505 }
1506 }
1507
1508 static void mt_post_parse_default_settings(struct mt_device *td,
1509 struct mt_application *app)
1510 {
1511 __s32 quirks = app->quirks;
1512
1513 /* unknown serial device needs special quirks */
1514 if (list_is_singular(&app->mt_usages)) {
1515 quirks |= MT_QUIRK_ALWAYS_VALID;
1516 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1517 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1518 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1519 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1520 }
1521
1522 app->quirks = quirks;
1523 }
1524
1525 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1526 {
1527 if (!app->have_contact_count)
1528 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1529 }
1530
1531 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1532 {
1533 struct mt_device *td = hid_get_drvdata(hdev);
1534 char *name;
1535 const char *suffix = NULL;
1536 struct mt_report_data *rdata;
1537 struct mt_application *mt_application = NULL;
1538 struct hid_report *report;
1539 int ret;
1540
1541 list_for_each_entry(report, &hi->reports, hidinput_list) {
1542 rdata = mt_find_report_data(td, report);
1543 if (!rdata) {
1544 hid_err(hdev, "failed to allocate data for report\n");
1545 return -ENOMEM;
1546 }
1547
1548 mt_application = rdata->application;
1549
1550 if (rdata->is_mt_collection) {
1551 ret = mt_touch_input_configured(hdev, hi,
1552 mt_application);
1553 if (ret)
1554 return ret;
1555 }
1556 }
1557
1558 switch (hi->application) {
1559 case HID_GD_KEYBOARD:
1560 case HID_GD_KEYPAD:
1561 case HID_GD_MOUSE:
1562 case HID_DG_TOUCHPAD:
1563 case HID_GD_SYSTEM_CONTROL:
1564 case HID_CP_CONSUMER_CONTROL:
1565 case HID_GD_WIRELESS_RADIO_CTLS:
1566 case HID_GD_SYSTEM_MULTIAXIS:
1567 /* already handled by hid core */
1568 break;
1569 case HID_DG_TOUCHSCREEN:
1570 /* we do not set suffix = "Touchscreen" */
1571 hi->input->name = hdev->name;
1572 break;
1573 case HID_DG_STYLUS:
1574 /* force BTN_STYLUS to allow tablet matching in udev */
1575 __set_bit(BTN_STYLUS, hi->input->keybit);
1576 break;
1577 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1578 suffix = "Custom Media Keys";
1579 break;
1580 case HID_DG_PEN:
1581 suffix = "Stylus";
1582 break;
1583 default:
1584 suffix = "UNKNOWN";
1585 break;
1586 }
1587
1588 if (suffix) {
1589 name = devm_kzalloc(&hi->input->dev,
1590 strlen(hdev->name) + strlen(suffix) + 2,
1591 GFP_KERNEL);
1592 if (name) {
1593 sprintf(name, "%s %s", hdev->name, suffix);
1594 hi->input->name = name;
1595 }
1596 }
1597
1598 return 0;
1599 }
1600
1601 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1602 {
1603 if (field->usage[0].hid != usage ||
1604 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1605 return;
1606
1607 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1608 field->flags |= HID_MAIN_ITEM_VARIABLE;
1609 }
1610
1611 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1612 {
1613 struct hid_report *report;
1614 int i;
1615
1616 list_for_each_entry(report,
1617 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1618 list) {
1619
1620 if (!report->maxfield)
1621 continue;
1622
1623 for (i = 0; i < report->maxfield; i++)
1624 if (report->field[i]->maxusage >= 1)
1625 mt_fix_const_field(report->field[i], usage);
1626 }
1627 }
1628
1629 static void mt_release_contacts(struct hid_device *hid)
1630 {
1631 struct hid_input *hidinput;
1632 struct mt_application *application;
1633 struct mt_device *td = hid_get_drvdata(hid);
1634
1635 list_for_each_entry(hidinput, &hid->inputs, list) {
1636 struct input_dev *input_dev = hidinput->input;
1637 struct input_mt *mt = input_dev->mt;
1638 int i;
1639
1640 if (mt) {
1641 for (i = 0; i < mt->num_slots; i++) {
1642 input_mt_slot(input_dev, i);
1643 input_mt_report_slot_state(input_dev,
1644 MT_TOOL_FINGER,
1645 false);
1646 }
1647 input_mt_sync_frame(input_dev);
1648 input_sync(input_dev);
1649 }
1650 }
1651
1652 list_for_each_entry(application, &td->applications, list) {
1653 application->num_received = 0;
1654 }
1655 }
1656
1657 static void mt_expired_timeout(struct timer_list *t)
1658 {
1659 struct mt_device *td = from_timer(td, t, release_timer);
1660 struct hid_device *hdev = td->hdev;
1661
1662 /*
1663 * An input report came in just before we release the sticky fingers,
1664 * it will take care of the sticky fingers.
1665 */
1666 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1667 return;
1668 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1669 mt_release_contacts(hdev);
1670 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1671 }
1672
1673 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1674 {
1675 int ret, i;
1676 struct mt_device *td;
1677 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1678
1679 for (i = 0; mt_classes[i].name ; i++) {
1680 if (id->driver_data == mt_classes[i].name) {
1681 mtclass = &(mt_classes[i]);
1682 break;
1683 }
1684 }
1685
1686 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1687 if (!td) {
1688 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1689 return -ENOMEM;
1690 }
1691 td->hdev = hdev;
1692 td->mtclass = *mtclass;
1693 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1694 hid_set_drvdata(hdev, td);
1695
1696 INIT_LIST_HEAD(&td->applications);
1697 INIT_LIST_HEAD(&td->reports);
1698
1699 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1700 td->serial_maybe = true;
1701
1702 /* This allows the driver to correctly support devices
1703 * that emit events over several HID messages.
1704 */
1705 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1706
1707 /*
1708 * This allows the driver to handle different input sensors
1709 * that emits events through different applications on the same HID
1710 * device.
1711 */
1712 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1713
1714 if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1715 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1716
1717 timer_setup(&td->release_timer, mt_expired_timeout, 0);
1718
1719 ret = hid_parse(hdev);
1720 if (ret != 0)
1721 return ret;
1722
1723 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1724 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1725
1726 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1727 if (ret)
1728 return ret;
1729
1730 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1731 if (ret)
1732 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1733 hdev->name);
1734
1735 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1736
1737 return 0;
1738 }
1739
1740 #ifdef CONFIG_PM
1741 static int mt_reset_resume(struct hid_device *hdev)
1742 {
1743 mt_release_contacts(hdev);
1744 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1745 return 0;
1746 }
1747
1748 static int mt_resume(struct hid_device *hdev)
1749 {
1750 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1751 * It should be safe to send it to other devices too.
1752 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1753
1754 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1755
1756 return 0;
1757 }
1758 #endif
1759
1760 static void mt_remove(struct hid_device *hdev)
1761 {
1762 struct mt_device *td = hid_get_drvdata(hdev);
1763
1764 del_timer_sync(&td->release_timer);
1765
1766 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1767 hid_hw_stop(hdev);
1768 }
1769
1770 /*
1771 * This list contains only:
1772 * - VID/PID of products not working with the default multitouch handling
1773 * - 2 generic rules.
1774 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1775 */
1776 static const struct hid_device_id mt_devices[] = {
1777
1778 /* 3M panels */
1779 { .driver_data = MT_CLS_3M,
1780 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1781 USB_DEVICE_ID_3M1968) },
1782 { .driver_data = MT_CLS_3M,
1783 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1784 USB_DEVICE_ID_3M2256) },
1785 { .driver_data = MT_CLS_3M,
1786 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1787 USB_DEVICE_ID_3M3266) },
1788
1789 /* Alps devices */
1790 { .driver_data = MT_CLS_WIN_8_DUAL,
1791 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1792 USB_VENDOR_ID_ALPS_JP,
1793 HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
1794 { .driver_data = MT_CLS_WIN_8_DUAL,
1795 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1796 USB_VENDOR_ID_ALPS_JP,
1797 HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
1798 { .driver_data = MT_CLS_WIN_8_DUAL,
1799 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1800 USB_VENDOR_ID_ALPS_JP,
1801 HID_DEVICE_ID_ALPS_1222) },
1802
1803 /* Lenovo X1 TAB Gen 2 */
1804 { .driver_data = MT_CLS_WIN_8_DUAL,
1805 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1806 USB_VENDOR_ID_LENOVO,
1807 USB_DEVICE_ID_LENOVO_X1_TAB) },
1808
1809 /* Lenovo X1 TAB Gen 3 */
1810 { .driver_data = MT_CLS_WIN_8_DUAL,
1811 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1812 USB_VENDOR_ID_LENOVO,
1813 USB_DEVICE_ID_LENOVO_X1_TAB3) },
1814
1815 /* Anton devices */
1816 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1817 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1818 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1819
1820 /* Asus T304UA */
1821 { .driver_data = MT_CLS_ASUS,
1822 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1823 USB_VENDOR_ID_ASUSTEK,
1824 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1825
1826 /* Atmel panels */
1827 { .driver_data = MT_CLS_SERIAL,
1828 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1829 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1830
1831 /* Baanto multitouch devices */
1832 { .driver_data = MT_CLS_NSMU,
1833 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1834 USB_DEVICE_ID_BAANTO_MT_190W2) },
1835
1836 /* Cando panels */
1837 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1838 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1839 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1840 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1841 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1842 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1843
1844 /* Chunghwa Telecom touch panels */
1845 { .driver_data = MT_CLS_NSMU,
1846 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1847 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1848
1849 /* Cirque devices */
1850 { .driver_data = MT_CLS_WIN_8_DUAL,
1851 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1852 I2C_VENDOR_ID_CIRQUE,
1853 I2C_PRODUCT_ID_CIRQUE_121F) },
1854
1855 /* CJTouch panels */
1856 { .driver_data = MT_CLS_NSMU,
1857 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1858 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1859 { .driver_data = MT_CLS_NSMU,
1860 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1861 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1862
1863 /* CVTouch panels */
1864 { .driver_data = MT_CLS_NSMU,
1865 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1866 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1867
1868 /* eGalax devices (resistive) */
1869 { .driver_data = MT_CLS_EGALAX,
1870 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1871 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1872 { .driver_data = MT_CLS_EGALAX,
1873 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1874 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1875
1876 /* eGalax devices (capacitive) */
1877 { .driver_data = MT_CLS_EGALAX_SERIAL,
1878 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1879 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1880 { .driver_data = MT_CLS_EGALAX,
1881 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1882 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1883 { .driver_data = MT_CLS_EGALAX_SERIAL,
1884 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1885 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1886 { .driver_data = MT_CLS_EGALAX_SERIAL,
1887 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1888 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1889 { .driver_data = MT_CLS_EGALAX_SERIAL,
1890 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1891 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1892 { .driver_data = MT_CLS_EGALAX_SERIAL,
1893 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1894 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1895 { .driver_data = MT_CLS_EGALAX,
1896 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1897 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1898 { .driver_data = MT_CLS_EGALAX,
1899 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1900 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1901 { .driver_data = MT_CLS_EGALAX_SERIAL,
1902 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1903 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1904 { .driver_data = MT_CLS_EGALAX,
1905 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1906 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1907 { .driver_data = MT_CLS_EGALAX,
1908 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1909 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1910 { .driver_data = MT_CLS_EGALAX,
1911 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1912 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1913 { .driver_data = MT_CLS_EGALAX,
1914 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1915 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1916 { .driver_data = MT_CLS_EGALAX_SERIAL,
1917 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1918 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1919 { .driver_data = MT_CLS_EGALAX_SERIAL,
1920 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1921 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1922 { .driver_data = MT_CLS_EGALAX_SERIAL,
1923 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1924 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1925
1926 /* Elitegroup panel */
1927 { .driver_data = MT_CLS_SERIAL,
1928 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1929 USB_DEVICE_ID_ELITEGROUP_05D8) },
1930
1931 /* Flatfrog Panels */
1932 { .driver_data = MT_CLS_FLATFROG,
1933 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1934 USB_DEVICE_ID_MULTITOUCH_3200) },
1935
1936 /* FocalTech Panels */
1937 { .driver_data = MT_CLS_SERIAL,
1938 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1939 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1940
1941 /* GeneralTouch panel */
1942 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1943 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1944 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1945 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1946 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1947 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1948 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1949 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1950 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1951 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1952 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1953 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1954 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1955 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1956 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1957 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1958 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1959 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1960 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1961 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1962 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1963
1964 /* Gametel game controller */
1965 { .driver_data = MT_CLS_NSMU,
1966 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1967 USB_DEVICE_ID_GAMETEL_MT_MODE) },
1968
1969 /* GoodTouch panels */
1970 { .driver_data = MT_CLS_NSMU,
1971 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1972 USB_DEVICE_ID_GOODTOUCH_000f) },
1973
1974 /* Hanvon panels */
1975 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1976 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1977 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1978
1979 /* Ilitek dual touch panel */
1980 { .driver_data = MT_CLS_NSMU,
1981 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1982 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1983
1984 /* LG Melfas panel */
1985 { .driver_data = MT_CLS_LG,
1986 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1987 USB_DEVICE_ID_LG_MELFAS_MT) },
1988 { .driver_data = MT_CLS_LG,
1989 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
1990 USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
1991
1992 /* MosArt panels */
1993 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1994 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1995 USB_DEVICE_ID_ASUS_T91MT)},
1996 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1997 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1998 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1999 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2000 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
2001 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
2002
2003 /* Novatek Panel */
2004 { .driver_data = MT_CLS_NSMU,
2005 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2006 USB_DEVICE_ID_NOVATEK_PCT) },
2007
2008 /* Ntrig Panel */
2009 { .driver_data = MT_CLS_NSMU,
2010 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2011 USB_VENDOR_ID_NTRIG, 0x1b05) },
2012
2013 /* Panasonic panels */
2014 { .driver_data = MT_CLS_PANASONIC,
2015 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2016 USB_DEVICE_ID_PANABOARD_UBT780) },
2017 { .driver_data = MT_CLS_PANASONIC,
2018 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2019 USB_DEVICE_ID_PANABOARD_UBT880) },
2020
2021 /* PixArt optical touch screen */
2022 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2023 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2024 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2025 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2026 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2027 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2028 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2029 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2030 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2031
2032 /* PixCir-based panels */
2033 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2034 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2035 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2036
2037 /* Quanta-based panels */
2038 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2039 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2040 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2041
2042 /* Razer touchpads */
2043 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2044 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2045 USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2046
2047 /* Smart Tech panels */
2048 { .driver_data = MT_CLS_SMART_TECH,
2049 MT_USB_DEVICE(0x0b8c, 0x0092)},
2050
2051 /* Stantum panels */
2052 { .driver_data = MT_CLS_CONFIDENCE,
2053 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2054 USB_DEVICE_ID_MTP_STM)},
2055
2056 /* TopSeed panels */
2057 { .driver_data = MT_CLS_TOPSEED,
2058 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2059 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2060
2061 /* Touch International panels */
2062 { .driver_data = MT_CLS_NSMU,
2063 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2064 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2065
2066 /* Unitec panels */
2067 { .driver_data = MT_CLS_NSMU,
2068 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2069 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2070 { .driver_data = MT_CLS_NSMU,
2071 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2072 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2073
2074 /* VTL panels */
2075 { .driver_data = MT_CLS_VTL,
2076 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2077 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2078
2079 /* Wistron panels */
2080 { .driver_data = MT_CLS_NSMU,
2081 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2082 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2083
2084 /* XAT */
2085 { .driver_data = MT_CLS_NSMU,
2086 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2087 USB_DEVICE_ID_XAT_CSR) },
2088
2089 /* Xiroku */
2090 { .driver_data = MT_CLS_NSMU,
2091 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2092 USB_DEVICE_ID_XIROKU_SPX) },
2093 { .driver_data = MT_CLS_NSMU,
2094 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2095 USB_DEVICE_ID_XIROKU_MPX) },
2096 { .driver_data = MT_CLS_NSMU,
2097 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2098 USB_DEVICE_ID_XIROKU_CSR) },
2099 { .driver_data = MT_CLS_NSMU,
2100 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2101 USB_DEVICE_ID_XIROKU_SPX1) },
2102 { .driver_data = MT_CLS_NSMU,
2103 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2104 USB_DEVICE_ID_XIROKU_MPX1) },
2105 { .driver_data = MT_CLS_NSMU,
2106 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2107 USB_DEVICE_ID_XIROKU_CSR1) },
2108 { .driver_data = MT_CLS_NSMU,
2109 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2110 USB_DEVICE_ID_XIROKU_SPX2) },
2111 { .driver_data = MT_CLS_NSMU,
2112 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2113 USB_DEVICE_ID_XIROKU_MPX2) },
2114 { .driver_data = MT_CLS_NSMU,
2115 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2116 USB_DEVICE_ID_XIROKU_CSR2) },
2117
2118 /* Google MT devices */
2119 { .driver_data = MT_CLS_GOOGLE,
2120 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2121 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2122
2123 /* Generic MT device */
2124 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2125
2126 /* Generic Win 8 certified MT device */
2127 { .driver_data = MT_CLS_WIN_8,
2128 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2129 HID_ANY_ID, HID_ANY_ID) },
2130 { }
2131 };
2132 MODULE_DEVICE_TABLE(hid, mt_devices);
2133
2134 static const struct hid_usage_id mt_grabbed_usages[] = {
2135 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2136 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2137 };
2138
2139 static struct hid_driver mt_driver = {
2140 .name = "hid-multitouch",
2141 .id_table = mt_devices,
2142 .probe = mt_probe,
2143 .remove = mt_remove,
2144 .input_mapping = mt_input_mapping,
2145 .input_mapped = mt_input_mapped,
2146 .input_configured = mt_input_configured,
2147 .feature_mapping = mt_feature_mapping,
2148 .usage_table = mt_grabbed_usages,
2149 .event = mt_event,
2150 .report = mt_report,
2151 #ifdef CONFIG_PM
2152 .reset_resume = mt_reset_resume,
2153 .resume = mt_resume,
2154 #endif
2155 };
2156 module_hid_driver(mt_driver);
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