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