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/bits.h>
35 #include <linux/device.h>
36 #include <linux/hid.h>
37 #include <linux/module.h>
38 #include <linux/slab.h>
39 #include <linux/input/mt.h>
40 #include <linux/jiffies.h>
41 #include <linux/string.h>
42 #include <linux/timer.h>
43
44
45 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
46 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
47 MODULE_DESCRIPTION("HID multitouch panels");
48 MODULE_LICENSE("GPL");
49
50 #include "hid-ids.h"
51
52 #include "hid-haptic.h"
53
54 /* quirks to control the device */
55 #define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0)
56 #define MT_QUIRK_SLOT_IS_CONTACTID BIT(1)
57 #define MT_QUIRK_CYPRESS BIT(2)
58 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER BIT(3)
59 #define MT_QUIRK_ALWAYS_VALID BIT(4)
60 #define MT_QUIRK_VALID_IS_INRANGE BIT(5)
61 #define MT_QUIRK_VALID_IS_CONFIDENCE BIT(6)
62 #define MT_QUIRK_CONFIDENCE BIT(7)
63 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE BIT(8)
64 #define MT_QUIRK_NO_AREA BIT(9)
65 #define MT_QUIRK_IGNORE_DUPLICATES BIT(10)
66 #define MT_QUIRK_HOVERING BIT(11)
67 #define MT_QUIRK_CONTACT_CNT_ACCURATE BIT(12)
68 #define MT_QUIRK_FORCE_GET_FEATURE BIT(13)
69 #define MT_QUIRK_FIX_CONST_CONTACT_ID BIT(14)
70 #define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15)
71 #define MT_QUIRK_STICKY_FINGERS BIT(16)
72 #define MT_QUIRK_ASUS_CUSTOM_UP BIT(17)
73 #define MT_QUIRK_WIN8_PTP_BUTTONS BIT(18)
74 #define MT_QUIRK_SEPARATE_APP_REPORT BIT(19)
75 #define MT_QUIRK_FORCE_MULTI_INPUT BIT(20)
76 #define MT_QUIRK_DISABLE_WAKEUP BIT(21)
77 #define MT_QUIRK_ORIENTATION_INVERT BIT(22)
78 #define MT_QUIRK_APPLE_TOUCHBAR BIT(23)
79
80 #define MT_INPUTMODE_TOUCHSCREEN 0x02
81 #define MT_INPUTMODE_TOUCHPAD 0x03
82
83 #define MT_BUTTONTYPE_CLICKPAD 0
84
85 enum latency_mode {
86 HID_LATENCY_NORMAL = 0,
87 HID_LATENCY_HIGH = 1,
88 };
89
90 enum report_mode {
91 TOUCHPAD_REPORT_NONE = 0,
92 TOUCHPAD_REPORT_BUTTONS = BIT(0),
93 TOUCHPAD_REPORT_CONTACTS = BIT(1),
94 TOUCHPAD_REPORT_ALL = TOUCHPAD_REPORT_BUTTONS | TOUCHPAD_REPORT_CONTACTS,
95 };
96
97 #define MT_IO_FLAGS_RUNNING 0
98 #define MT_IO_FLAGS_ACTIVE_SLOTS 1
99 #define MT_IO_FLAGS_PENDING_SLOTS 2
100
101 static const bool mtrue = true; /* default for true */
102 static const bool mfalse; /* default for false */
103 static const __s32 mzero; /* default for 0 */
104
105 #define DEFAULT_TRUE ((void *)&mtrue)
106 #define DEFAULT_FALSE ((void *)&mfalse)
107 #define DEFAULT_ZERO ((void *)&mzero)
108
109 struct mt_usages {
110 struct list_head list;
111 __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
112 __s32 *contactid; /* the device ContactID assigned to this slot */
113 bool *tip_state; /* is the touch valid? */
114 bool *inrange_state; /* is the finger in proximity of the sensor? */
115 bool *confidence_state; /* is the touch made by a finger? */
116 };
117
118 struct mt_application {
119 struct list_head list;
120 unsigned int application;
121 unsigned int report_id;
122 struct list_head mt_usages; /* mt usages list */
123
124 __s32 quirks;
125
126 __s32 *scantime; /* scantime reported */
127 __s32 scantime_logical_max; /* max value for raw scantime */
128
129 __s32 *raw_cc; /* contact count in the report */
130 int left_button_state; /* left button state */
131 unsigned int mt_flags; /* flags to pass to input-mt */
132
133 unsigned long *pending_palm_slots; /* slots where we reported palm
134 * and need to release */
135
136 __u8 num_received; /* how many contacts we received */
137 __u8 num_expected; /* expected last contact index */
138 __u8 buttons_count; /* number of physical buttons per touchpad */
139 __u8 touches_by_report; /* how many touches are present in one report:
140 * 1 means we should use a serial protocol
141 * > 1 means hybrid (multitouch) protocol
142 */
143
144 unsigned long jiffies; /* the frame's jiffies */
145 int timestamp; /* the timestamp to be sent */
146 int prev_scantime; /* scantime reported previously */
147
148 bool have_contact_count;
149 };
150
151 struct mt_class {
152 __s32 name; /* MT_CLS */
153 __s32 quirks;
154 __s32 sn_move; /* Signal/noise ratio for move events */
155 __s32 sn_width; /* Signal/noise ratio for width events */
156 __s32 sn_height; /* Signal/noise ratio for height events */
157 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
158 __u8 maxcontacts;
159 bool is_indirect; /* true for touchpads */
160 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
161 };
162
163 struct mt_report_data {
164 struct list_head list;
165 struct hid_report *report;
166 struct mt_application *application;
167 bool is_mt_collection;
168 };
169
170 struct mt_device {
171 struct mt_class mtclass; /* our mt device class */
172 struct timer_list release_timer; /* to release sticky fingers */
173 struct hid_haptic_device *haptic; /* haptic related configuration */
174 struct hid_device *hdev; /* hid_device we're attached to */
175 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
176 __u8 inputmode_value; /* InputMode HID feature value */
177 __u8 maxcontacts;
178 bool is_buttonpad; /* is this device a button pad? */
179 bool is_haptic_touchpad; /* is this device a haptic touchpad? */
180 bool serial_maybe; /* need to check for serial protocol */
181
182 struct list_head applications;
183 struct list_head reports;
184 };
185
186 static void mt_post_parse_default_settings(struct mt_device *td,
187 struct mt_application *app);
188 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
189
190 /* classes of device behavior */
191 #define MT_CLS_DEFAULT 0x0001
192
193 #define MT_CLS_SERIAL 0x0002
194 #define MT_CLS_CONFIDENCE 0x0003
195 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
196 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
197 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
198 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
199 /* reserved 0x0008 */
200 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
201 #define MT_CLS_NSMU 0x000a
202 /* reserved 0x0010 */
203 /* reserved 0x0011 */
204 #define MT_CLS_WIN_8 0x0012
205 #define MT_CLS_EXPORT_ALL_INPUTS 0x0013
206 /* reserved 0x0014 */
207 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT 0x0015
208 #define MT_CLS_WIN_8_DISABLE_WAKEUP 0x0016
209 #define MT_CLS_WIN_8_NO_STICKY_FINGERS 0x0017
210 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU 0x0018
211
212 /* vendor specific classes */
213 #define MT_CLS_3M 0x0101
214 /* reserved 0x0102 */
215 #define MT_CLS_EGALAX 0x0103
216 #define MT_CLS_EGALAX_SERIAL 0x0104
217 #define MT_CLS_TOPSEED 0x0105
218 #define MT_CLS_PANASONIC 0x0106
219 #define MT_CLS_FLATFROG 0x0107
220 #define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
221 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
222 #define MT_CLS_LG 0x010a
223 #define MT_CLS_ASUS 0x010b
224 #define MT_CLS_VTL 0x0110
225 #define MT_CLS_GOOGLE 0x0111
226 #define MT_CLS_RAZER_BLADE_STEALTH 0x0112
227 #define MT_CLS_SMART_TECH 0x0113
228 #define MT_CLS_APPLE_TOUCHBAR 0x0114
229 #define MT_CLS_SIS 0x0457
230
231 #define MT_DEFAULT_MAXCONTACT 10
232 #define MT_MAX_MAXCONTACT 250
233
234 /*
235 * Resync device and local timestamps after that many microseconds without
236 * receiving data.
237 */
238 #define MAX_TIMESTAMP_INTERVAL 1000000
239
240 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
241 #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
242
243 /*
244 * these device-dependent functions determine what slot corresponds
245 * to a valid contact that was just read.
246 */
247
cypress_compute_slot(struct mt_application * application,struct mt_usages * slot)248 static int cypress_compute_slot(struct mt_application *application,
249 struct mt_usages *slot)
250 {
251 if (*slot->contactid != 0 || application->num_received == 0)
252 return *slot->contactid;
253 else
254 return -1;
255 }
256
257 static const struct mt_class mt_classes[] = {
258 { .name = MT_CLS_DEFAULT,
259 .quirks = MT_QUIRK_ALWAYS_VALID |
260 MT_QUIRK_CONTACT_CNT_ACCURATE },
261 { .name = MT_CLS_NSMU,
262 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
263 { .name = MT_CLS_SERIAL,
264 .quirks = MT_QUIRK_ALWAYS_VALID},
265 { .name = MT_CLS_CONFIDENCE,
266 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
267 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
268 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
269 MT_QUIRK_SLOT_IS_CONTACTID },
270 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
271 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
272 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
273 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
274 .quirks = MT_QUIRK_VALID_IS_INRANGE |
275 MT_QUIRK_SLOT_IS_CONTACTID,
276 .maxcontacts = 2 },
277 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
278 .quirks = MT_QUIRK_VALID_IS_INRANGE |
279 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
280 .maxcontacts = 2 },
281 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
282 .quirks = MT_QUIRK_VALID_IS_INRANGE |
283 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
284 { .name = MT_CLS_WIN_8,
285 .quirks = MT_QUIRK_ALWAYS_VALID |
286 MT_QUIRK_IGNORE_DUPLICATES |
287 MT_QUIRK_HOVERING |
288 MT_QUIRK_CONTACT_CNT_ACCURATE |
289 MT_QUIRK_STICKY_FINGERS |
290 MT_QUIRK_WIN8_PTP_BUTTONS,
291 .export_all_inputs = true },
292 { .name = MT_CLS_EXPORT_ALL_INPUTS,
293 .quirks = MT_QUIRK_ALWAYS_VALID |
294 MT_QUIRK_CONTACT_CNT_ACCURATE,
295 .export_all_inputs = true },
296 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
297 .quirks = MT_QUIRK_ALWAYS_VALID |
298 MT_QUIRK_IGNORE_DUPLICATES |
299 MT_QUIRK_HOVERING |
300 MT_QUIRK_CONTACT_CNT_ACCURATE |
301 MT_QUIRK_STICKY_FINGERS |
302 MT_QUIRK_WIN8_PTP_BUTTONS |
303 MT_QUIRK_FORCE_MULTI_INPUT,
304 .export_all_inputs = true },
305 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
306 .quirks = MT_QUIRK_IGNORE_DUPLICATES |
307 MT_QUIRK_HOVERING |
308 MT_QUIRK_CONTACT_CNT_ACCURATE |
309 MT_QUIRK_STICKY_FINGERS |
310 MT_QUIRK_WIN8_PTP_BUTTONS |
311 MT_QUIRK_FORCE_MULTI_INPUT |
312 MT_QUIRK_NOT_SEEN_MEANS_UP,
313 .export_all_inputs = true },
314 { .name = MT_CLS_WIN_8_DISABLE_WAKEUP,
315 .quirks = MT_QUIRK_ALWAYS_VALID |
316 MT_QUIRK_IGNORE_DUPLICATES |
317 MT_QUIRK_HOVERING |
318 MT_QUIRK_CONTACT_CNT_ACCURATE |
319 MT_QUIRK_STICKY_FINGERS |
320 MT_QUIRK_WIN8_PTP_BUTTONS |
321 MT_QUIRK_DISABLE_WAKEUP,
322 .export_all_inputs = true },
323 { .name = MT_CLS_WIN_8_NO_STICKY_FINGERS,
324 .quirks = MT_QUIRK_ALWAYS_VALID |
325 MT_QUIRK_IGNORE_DUPLICATES |
326 MT_QUIRK_HOVERING |
327 MT_QUIRK_CONTACT_CNT_ACCURATE |
328 MT_QUIRK_WIN8_PTP_BUTTONS,
329 .export_all_inputs = true },
330
331 /*
332 * vendor specific classes
333 */
334 { .name = MT_CLS_3M,
335 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
336 MT_QUIRK_SLOT_IS_CONTACTID |
337 MT_QUIRK_TOUCH_SIZE_SCALING,
338 .sn_move = 2048,
339 .sn_width = 128,
340 .sn_height = 128,
341 .maxcontacts = 60,
342 },
343 { .name = MT_CLS_EGALAX,
344 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
345 MT_QUIRK_VALID_IS_INRANGE,
346 .sn_move = 4096,
347 .sn_pressure = 32,
348 },
349 { .name = MT_CLS_EGALAX_SERIAL,
350 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
351 MT_QUIRK_ALWAYS_VALID,
352 .sn_move = 4096,
353 .sn_pressure = 32,
354 },
355 { .name = MT_CLS_TOPSEED,
356 .quirks = MT_QUIRK_ALWAYS_VALID,
357 .is_indirect = true,
358 .maxcontacts = 2,
359 },
360 { .name = MT_CLS_PANASONIC,
361 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
362 .maxcontacts = 4 },
363 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
364 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
365 MT_QUIRK_VALID_IS_INRANGE |
366 MT_QUIRK_SLOT_IS_CONTACTID,
367 .maxcontacts = 2
368 },
369 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
370 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
371 MT_QUIRK_SLOT_IS_CONTACTID
372 },
373
374 { .name = MT_CLS_FLATFROG,
375 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
376 MT_QUIRK_NO_AREA,
377 .sn_move = 2048,
378 .maxcontacts = 40,
379 },
380 { .name = MT_CLS_LG,
381 .quirks = MT_QUIRK_ALWAYS_VALID |
382 MT_QUIRK_FIX_CONST_CONTACT_ID |
383 MT_QUIRK_IGNORE_DUPLICATES |
384 MT_QUIRK_HOVERING |
385 MT_QUIRK_CONTACT_CNT_ACCURATE },
386 { .name = MT_CLS_ASUS,
387 .quirks = MT_QUIRK_ALWAYS_VALID |
388 MT_QUIRK_CONTACT_CNT_ACCURATE |
389 MT_QUIRK_ASUS_CUSTOM_UP },
390 { .name = MT_CLS_VTL,
391 .quirks = MT_QUIRK_ALWAYS_VALID |
392 MT_QUIRK_CONTACT_CNT_ACCURATE |
393 MT_QUIRK_FORCE_GET_FEATURE,
394 },
395 { .name = MT_CLS_GOOGLE,
396 .quirks = MT_QUIRK_ALWAYS_VALID |
397 MT_QUIRK_CONTACT_CNT_ACCURATE |
398 MT_QUIRK_SLOT_IS_CONTACTID |
399 MT_QUIRK_HOVERING
400 },
401 { .name = MT_CLS_RAZER_BLADE_STEALTH,
402 .quirks = MT_QUIRK_ALWAYS_VALID |
403 MT_QUIRK_IGNORE_DUPLICATES |
404 MT_QUIRK_HOVERING |
405 MT_QUIRK_CONTACT_CNT_ACCURATE |
406 MT_QUIRK_WIN8_PTP_BUTTONS,
407 },
408 { .name = MT_CLS_SMART_TECH,
409 .quirks = MT_QUIRK_ALWAYS_VALID |
410 MT_QUIRK_IGNORE_DUPLICATES |
411 MT_QUIRK_CONTACT_CNT_ACCURATE |
412 MT_QUIRK_SEPARATE_APP_REPORT,
413 },
414 { .name = MT_CLS_APPLE_TOUCHBAR,
415 .quirks = MT_QUIRK_HOVERING |
416 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE |
417 MT_QUIRK_APPLE_TOUCHBAR,
418 .maxcontacts = 11,
419 },
420 { .name = MT_CLS_SIS,
421 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
422 MT_QUIRK_ALWAYS_VALID |
423 MT_QUIRK_CONTACT_CNT_ACCURATE,
424 },
425 { }
426 };
427
mt_show_quirks(struct device * dev,struct device_attribute * attr,char * buf)428 static ssize_t mt_show_quirks(struct device *dev,
429 struct device_attribute *attr,
430 char *buf)
431 {
432 struct hid_device *hdev = to_hid_device(dev);
433 struct mt_device *td = hid_get_drvdata(hdev);
434
435 return sprintf(buf, "%u\n", td->mtclass.quirks);
436 }
437
mt_set_quirks(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)438 static ssize_t mt_set_quirks(struct device *dev,
439 struct device_attribute *attr,
440 const char *buf, size_t count)
441 {
442 struct hid_device *hdev = to_hid_device(dev);
443 struct mt_device *td = hid_get_drvdata(hdev);
444 struct mt_application *application;
445
446 unsigned long val;
447
448 if (kstrtoul(buf, 0, &val))
449 return -EINVAL;
450
451 td->mtclass.quirks = val;
452
453 list_for_each_entry(application, &td->applications, list) {
454 application->quirks = val;
455 if (!application->have_contact_count)
456 application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
457 }
458
459 return count;
460 }
461
462 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
463
464 static struct attribute *sysfs_attrs[] = {
465 &dev_attr_quirks.attr,
466 NULL
467 };
468
469 static const struct attribute_group mt_attribute_group = {
470 .attrs = sysfs_attrs
471 };
472
mt_get_feature(struct hid_device * hdev,struct hid_report * report)473 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
474 {
475 int ret;
476 u32 size = hid_report_len(report);
477 u8 *buf;
478
479 /*
480 * Do not fetch the feature report if the device has been explicitly
481 * marked as non-capable.
482 */
483 if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
484 return;
485
486 buf = hid_alloc_report_buf(report, GFP_KERNEL);
487 if (!buf)
488 return;
489
490 ret = hid_hw_raw_request(hdev, report->id, buf, size,
491 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
492 if (ret < 0) {
493 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
494 report->id);
495 } else {
496 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
497 size, 0);
498 if (ret)
499 dev_warn(&hdev->dev, "failed to report feature\n");
500 }
501
502 kfree(buf);
503 }
504
mt_feature_mapping(struct hid_device * hdev,struct hid_field * field,struct hid_usage * usage)505 static void mt_feature_mapping(struct hid_device *hdev,
506 struct hid_field *field, struct hid_usage *usage)
507 {
508 struct mt_device *td = hid_get_drvdata(hdev);
509
510 switch (usage->hid) {
511 case HID_DG_CONTACTMAX:
512 mt_get_feature(hdev, field->report);
513
514 td->maxcontacts = field->value[0];
515 if (!td->maxcontacts &&
516 field->logical_maximum <= MT_MAX_MAXCONTACT)
517 td->maxcontacts = field->logical_maximum;
518 if (td->mtclass.maxcontacts)
519 /* check if the maxcontacts is given by the class */
520 td->maxcontacts = td->mtclass.maxcontacts;
521
522 break;
523 case HID_DG_BUTTONTYPE:
524 if (usage->usage_index >= field->report_count) {
525 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
526 break;
527 }
528
529 mt_get_feature(hdev, field->report);
530 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
531 td->is_buttonpad = true;
532
533 break;
534 case 0xff0000c5:
535 /* Retrieve the Win8 blob once to enable some devices */
536 if (usage->usage_index == 0)
537 mt_get_feature(hdev, field->report);
538 break;
539 }
540
541 hid_haptic_feature_mapping(hdev, td->haptic, field, usage);
542 }
543
set_abs(struct input_dev * input,unsigned int code,struct hid_field * field,int snratio)544 static void set_abs(struct input_dev *input, unsigned int code,
545 struct hid_field *field, int snratio)
546 {
547 int fmin = field->logical_minimum;
548 int fmax = field->logical_maximum;
549 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
550 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
551 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
552 }
553
mt_allocate_usage(struct hid_device * hdev,struct mt_application * application)554 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
555 struct mt_application *application)
556 {
557 struct mt_usages *usage;
558
559 usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
560 if (!usage)
561 return NULL;
562
563 /* set some defaults so we do not need to check for null pointers */
564 usage->x = DEFAULT_ZERO;
565 usage->y = DEFAULT_ZERO;
566 usage->cx = DEFAULT_ZERO;
567 usage->cy = DEFAULT_ZERO;
568 usage->p = DEFAULT_ZERO;
569 usage->w = DEFAULT_ZERO;
570 usage->h = DEFAULT_ZERO;
571 usage->a = DEFAULT_ZERO;
572 usage->contactid = DEFAULT_ZERO;
573 usage->tip_state = DEFAULT_FALSE;
574 usage->inrange_state = DEFAULT_FALSE;
575 usage->confidence_state = DEFAULT_TRUE;
576
577 list_add_tail(&usage->list, &application->mt_usages);
578
579 return usage;
580 }
581
mt_allocate_application(struct mt_device * td,struct hid_report * report)582 static struct mt_application *mt_allocate_application(struct mt_device *td,
583 struct hid_report *report)
584 {
585 unsigned int application = report->application;
586 struct mt_application *mt_application;
587
588 mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
589 GFP_KERNEL);
590 if (!mt_application)
591 return NULL;
592
593 mt_application->application = application;
594 INIT_LIST_HEAD(&mt_application->mt_usages);
595
596 if (application == HID_DG_TOUCHSCREEN)
597 mt_application->mt_flags |= INPUT_MT_DIRECT;
598
599 /*
600 * Model touchscreens providing buttons as touchpads.
601 */
602 if (application == HID_DG_TOUCHPAD) {
603 mt_application->mt_flags |= INPUT_MT_POINTER;
604 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
605 }
606
607 mt_application->scantime = DEFAULT_ZERO;
608 mt_application->raw_cc = DEFAULT_ZERO;
609 mt_application->quirks = td->mtclass.quirks;
610 mt_application->report_id = report->id;
611
612 list_add_tail(&mt_application->list, &td->applications);
613
614 return mt_application;
615 }
616
mt_find_application(struct mt_device * td,struct hid_report * report)617 static struct mt_application *mt_find_application(struct mt_device *td,
618 struct hid_report *report)
619 {
620 unsigned int application = report->application;
621 struct mt_application *tmp, *mt_application = NULL;
622
623 list_for_each_entry(tmp, &td->applications, list) {
624 if (application == tmp->application) {
625 if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
626 tmp->report_id == report->id) {
627 mt_application = tmp;
628 break;
629 }
630 }
631 }
632
633 if (!mt_application)
634 mt_application = mt_allocate_application(td, report);
635
636 return mt_application;
637 }
638
mt_allocate_report_data(struct mt_device * td,struct hid_report * report)639 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
640 struct hid_report *report)
641 {
642 struct mt_class *cls = &td->mtclass;
643 struct mt_report_data *rdata;
644 struct hid_field *field;
645 int r, n;
646
647 rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
648 if (!rdata)
649 return NULL;
650
651 rdata->report = report;
652 rdata->application = mt_find_application(td, report);
653
654 if (!rdata->application) {
655 devm_kfree(&td->hdev->dev, rdata);
656 return NULL;
657 }
658
659 for (r = 0; r < report->maxfield; r++) {
660 field = report->field[r];
661
662 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
663 continue;
664
665 if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) {
666 for (n = 0; n < field->report_count; n++) {
667 unsigned int hid = field->usage[n].hid;
668
669 if (hid == HID_DG_CONTACTID ||
670 (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR &&
671 hid == HID_DG_TRANSDUCER_INDEX)) {
672 rdata->is_mt_collection = true;
673 break;
674 }
675 }
676 }
677 }
678
679 list_add_tail(&rdata->list, &td->reports);
680
681 return rdata;
682 }
683
mt_find_report_data(struct mt_device * td,struct hid_report * report)684 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
685 struct hid_report *report)
686 {
687 struct mt_report_data *tmp, *rdata = NULL;
688
689 list_for_each_entry(tmp, &td->reports, list) {
690 if (report == tmp->report) {
691 rdata = tmp;
692 break;
693 }
694 }
695
696 if (!rdata)
697 rdata = mt_allocate_report_data(td, report);
698
699 return rdata;
700 }
701
mt_store_field(struct hid_device * hdev,struct mt_application * application,__s32 * value,size_t offset)702 static void mt_store_field(struct hid_device *hdev,
703 struct mt_application *application,
704 __s32 *value,
705 size_t offset)
706 {
707 struct mt_usages *usage;
708 __s32 **target;
709
710 if (list_empty(&application->mt_usages))
711 usage = mt_allocate_usage(hdev, application);
712 else
713 usage = list_last_entry(&application->mt_usages,
714 struct mt_usages,
715 list);
716
717 if (!usage)
718 return;
719
720 target = (__s32 **)((char *)usage + offset);
721
722 /* the value has already been filled, create a new slot */
723 if (*target != DEFAULT_TRUE &&
724 *target != DEFAULT_FALSE &&
725 *target != DEFAULT_ZERO) {
726 if (usage->contactid == DEFAULT_ZERO ||
727 usage->x == DEFAULT_ZERO ||
728 usage->y == DEFAULT_ZERO) {
729 hid_dbg(hdev,
730 "ignoring duplicate usage on incomplete");
731 return;
732 }
733 usage = mt_allocate_usage(hdev, application);
734 if (!usage)
735 return;
736
737 target = (__s32 **)((char *)usage + offset);
738 }
739
740 *target = value;
741 }
742
743 #define MT_STORE_FIELD(__name) \
744 mt_store_field(hdev, app, \
745 &field->value[usage->usage_index], \
746 offsetof(struct mt_usages, __name))
747
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)748 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
749 struct hid_field *field, struct hid_usage *usage,
750 unsigned long **bit, int *max, struct mt_application *app)
751 {
752 struct mt_device *td = hid_get_drvdata(hdev);
753 struct mt_class *cls = &td->mtclass;
754 int code;
755 struct hid_usage *prev_usage = NULL;
756
757 /*
758 * Model touchscreens providing buttons as touchpads.
759 */
760 if (field->application == HID_DG_TOUCHSCREEN &&
761 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
762 app->mt_flags |= INPUT_MT_POINTER;
763 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
764 }
765
766 /* count the buttons on touchpads */
767 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
768 app->buttons_count++;
769
770 if (usage->usage_index)
771 prev_usage = &field->usage[usage->usage_index - 1];
772
773 switch (usage->hid & HID_USAGE_PAGE) {
774
775 case HID_UP_GENDESK:
776 switch (usage->hid) {
777 case HID_GD_X:
778 if (prev_usage && (prev_usage->hid == usage->hid)) {
779 code = ABS_MT_TOOL_X;
780 MT_STORE_FIELD(cx);
781 } else {
782 code = ABS_MT_POSITION_X;
783 MT_STORE_FIELD(x);
784 }
785
786 set_abs(hi->input, code, field, cls->sn_move);
787
788 /*
789 * A system multi-axis that exports X and Y has a high
790 * chance of being used directly on a surface
791 */
792 if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
793 __set_bit(INPUT_PROP_DIRECT,
794 hi->input->propbit);
795 input_set_abs_params(hi->input,
796 ABS_MT_TOOL_TYPE,
797 MT_TOOL_DIAL,
798 MT_TOOL_DIAL, 0, 0);
799 }
800
801 return 1;
802 case HID_GD_Y:
803 if (prev_usage && (prev_usage->hid == usage->hid)) {
804 code = ABS_MT_TOOL_Y;
805 MT_STORE_FIELD(cy);
806 } else {
807 code = ABS_MT_POSITION_Y;
808 MT_STORE_FIELD(y);
809 }
810
811 set_abs(hi->input, code, field, cls->sn_move);
812
813 return 1;
814 }
815 return 0;
816
817 case HID_UP_DIGITIZER:
818 switch (usage->hid) {
819 case HID_DG_INRANGE:
820 if (app->quirks & MT_QUIRK_HOVERING) {
821 input_set_abs_params(hi->input,
822 ABS_MT_DISTANCE, 0, 1, 0, 0);
823 }
824 MT_STORE_FIELD(inrange_state);
825 return 1;
826 case HID_DG_CONFIDENCE:
827 if ((cls->name == MT_CLS_WIN_8 ||
828 cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT ||
829 cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU ||
830 cls->name == MT_CLS_WIN_8_DISABLE_WAKEUP) &&
831 (field->application == HID_DG_TOUCHPAD ||
832 field->application == HID_DG_TOUCHSCREEN))
833 app->quirks |= MT_QUIRK_CONFIDENCE;
834
835 if (app->quirks & MT_QUIRK_CONFIDENCE)
836 input_set_abs_params(hi->input,
837 ABS_MT_TOOL_TYPE,
838 MT_TOOL_FINGER,
839 MT_TOOL_PALM, 0, 0);
840
841 MT_STORE_FIELD(confidence_state);
842 return 1;
843 case HID_DG_TOUCH:
844 /*
845 * Legacy devices use TIPSWITCH and not TOUCH.
846 * One special case here is of the Apple Touch Bars.
847 * In these devices, the tip state is contained in
848 * fields with the HID_DG_TOUCH usage.
849 * Let's just ignore this field for other devices.
850 */
851 if (!(cls->quirks & MT_QUIRK_APPLE_TOUCHBAR))
852 return -1;
853 fallthrough;
854 case HID_DG_TIPSWITCH:
855 if (field->application != HID_GD_SYSTEM_MULTIAXIS)
856 input_set_capability(hi->input,
857 EV_KEY, BTN_TOUCH);
858 MT_STORE_FIELD(tip_state);
859 return 1;
860 case HID_DG_TRANSDUCER_INDEX:
861 /*
862 * Contact ID in case of Apple Touch Bars is contained
863 * in fields with HID_DG_TRANSDUCER_INDEX usage.
864 */
865 if (!(cls->quirks & MT_QUIRK_APPLE_TOUCHBAR))
866 return 0;
867 fallthrough;
868 case HID_DG_CONTACTID:
869 MT_STORE_FIELD(contactid);
870 app->touches_by_report++;
871 return 1;
872 case HID_DG_WIDTH:
873 if (!(app->quirks & MT_QUIRK_NO_AREA))
874 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
875 cls->sn_width);
876 MT_STORE_FIELD(w);
877 return 1;
878 case HID_DG_HEIGHT:
879 if (!(app->quirks & MT_QUIRK_NO_AREA)) {
880 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
881 cls->sn_height);
882
883 /*
884 * Only set ABS_MT_ORIENTATION if it is not
885 * already set by the HID_DG_AZIMUTH usage.
886 */
887 if (!test_bit(ABS_MT_ORIENTATION,
888 hi->input->absbit))
889 input_set_abs_params(hi->input,
890 ABS_MT_ORIENTATION, 0, 1, 0, 0);
891 }
892 MT_STORE_FIELD(h);
893 return 1;
894 case HID_DG_TIPPRESSURE:
895 set_abs(hi->input, ABS_MT_PRESSURE, field,
896 cls->sn_pressure);
897 td->is_haptic_touchpad =
898 hid_haptic_check_pressure_unit(td->haptic,
899 hi, field);
900 MT_STORE_FIELD(p);
901 return 1;
902 case HID_DG_SCANTIME:
903 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
904 app->scantime = &field->value[usage->usage_index];
905 app->scantime_logical_max = field->logical_maximum;
906 return 1;
907 case HID_DG_CONTACTCOUNT:
908 app->have_contact_count = true;
909 app->raw_cc = &field->value[usage->usage_index];
910 return 1;
911 case HID_DG_AZIMUTH:
912 /*
913 * Azimuth has the range of [0, MAX) representing a full
914 * revolution. Set ABS_MT_ORIENTATION to a quarter of
915 * MAX according the definition of ABS_MT_ORIENTATION
916 */
917 input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
918 -field->logical_maximum / 4,
919 field->logical_maximum / 4,
920 cls->sn_move ?
921 field->logical_maximum / cls->sn_move : 0, 0);
922 MT_STORE_FIELD(a);
923 return 1;
924 case HID_DG_CONTACTMAX:
925 /* contact max are global to the report */
926 return -1;
927 }
928 /* let hid-input decide for the others */
929 return 0;
930
931 case HID_UP_BUTTON:
932 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
933 /*
934 * MS PTP spec says that external buttons left and right have
935 * usages 2 and 3.
936 */
937 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
938 field->application == HID_DG_TOUCHPAD &&
939 (usage->hid & HID_USAGE) > 1)
940 code--;
941
942 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
943 code = BTN_0 + ((usage->hid - 1) & HID_USAGE);
944
945 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
946 if (!*bit)
947 return -1;
948 input_set_capability(hi->input, EV_KEY, code);
949 return 1;
950
951 case 0xff000000:
952 /* we do not want to map these: no input-oriented meaning */
953 return -1;
954 }
955
956 return 0;
957 }
958
mt_compute_slot(struct mt_device * td,struct mt_application * app,struct mt_usages * slot,struct input_dev * input)959 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
960 struct mt_usages *slot,
961 struct input_dev *input)
962 {
963 __s32 quirks = app->quirks;
964
965 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
966 return *slot->contactid;
967
968 if (quirks & MT_QUIRK_CYPRESS)
969 return cypress_compute_slot(app, slot);
970
971 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
972 return app->num_received;
973
974 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
975 return *slot->contactid - 1;
976
977 return input_mt_get_slot_by_key(input, *slot->contactid);
978 }
979
mt_release_pending_palms(struct mt_device * td,struct mt_application * app,struct input_dev * input)980 static void mt_release_pending_palms(struct mt_device *td,
981 struct mt_application *app,
982 struct input_dev *input)
983 {
984 int slotnum;
985 bool need_sync = false;
986
987 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
988 clear_bit(slotnum, app->pending_palm_slots);
989
990 input_mt_slot(input, slotnum);
991 input_mt_report_slot_inactive(input);
992
993 need_sync = true;
994 }
995
996 if (need_sync) {
997 input_mt_sync_frame(input);
998 input_sync(input);
999 }
1000 }
1001
1002 /*
1003 * this function is called when a whole packet has been received and processed,
1004 * so that it can decide what to send to the input layer.
1005 */
mt_sync_frame(struct mt_device * td,struct mt_application * app,struct input_dev * input)1006 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
1007 struct input_dev *input)
1008 {
1009 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
1010 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
1011
1012 input_mt_sync_frame(input);
1013 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
1014 input_sync(input);
1015
1016 mt_release_pending_palms(td, app, input);
1017
1018 app->num_received = 0;
1019 app->left_button_state = 0;
1020 if (td->is_haptic_touchpad)
1021 hid_haptic_pressure_reset(td->haptic);
1022
1023 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
1024 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
1025 else
1026 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
1027 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1028 }
1029
mt_compute_timestamp(struct mt_application * app,__s32 value)1030 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
1031 {
1032 long delta = value - app->prev_scantime;
1033 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
1034
1035 app->jiffies = jiffies;
1036
1037 if (delta < 0)
1038 delta += app->scantime_logical_max;
1039
1040 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
1041 delta *= 100;
1042
1043 if (jdelta > MAX_TIMESTAMP_INTERVAL)
1044 /* No data received for a while, resync the timestamp. */
1045 return 0;
1046 else
1047 return app->timestamp + delta;
1048 }
1049
mt_touch_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1050 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
1051 struct hid_usage *usage, __s32 value)
1052 {
1053 /* we will handle the hidinput part later, now remains hiddev */
1054 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
1055 hid->hiddev_hid_event(hid, field, usage, value);
1056
1057 return 1;
1058 }
1059
mt_process_slot(struct mt_device * td,struct input_dev * input,struct mt_application * app,struct mt_usages * slot)1060 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
1061 struct mt_application *app,
1062 struct mt_usages *slot)
1063 {
1064 struct input_mt *mt = input->mt;
1065 struct hid_device *hdev = td->hdev;
1066 __s32 quirks = app->quirks;
1067 bool valid = true;
1068 bool confidence_state = true;
1069 bool inrange_state = false;
1070 int active;
1071 int slotnum;
1072 int tool = MT_TOOL_FINGER;
1073
1074 if (!slot)
1075 return -EINVAL;
1076
1077 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
1078 app->num_received >= app->num_expected)
1079 return -EAGAIN;
1080
1081 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
1082 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
1083 valid = *slot->inrange_state;
1084 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1085 valid = *slot->tip_state;
1086 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
1087 valid = *slot->confidence_state;
1088
1089 if (!valid)
1090 return 0;
1091 }
1092
1093 slotnum = mt_compute_slot(td, app, slot, input);
1094 if (slotnum < 0 || slotnum >= td->maxcontacts)
1095 return 0;
1096
1097 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1098 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1099
1100 if (input_mt_is_active(i_slot) &&
1101 input_mt_is_used(mt, i_slot))
1102 return -EAGAIN;
1103 }
1104
1105 if (quirks & MT_QUIRK_CONFIDENCE)
1106 confidence_state = *slot->confidence_state;
1107
1108 if (quirks & MT_QUIRK_HOVERING)
1109 inrange_state = *slot->inrange_state;
1110
1111 active = *slot->tip_state || inrange_state;
1112
1113 if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1114 tool = MT_TOOL_DIAL;
1115 else if (unlikely(!confidence_state)) {
1116 tool = MT_TOOL_PALM;
1117 if (!active && mt &&
1118 input_mt_is_active(&mt->slots[slotnum])) {
1119 /*
1120 * The non-confidence was reported for
1121 * previously valid contact that is also no
1122 * longer valid. We can't simply report
1123 * lift-off as userspace will not be aware
1124 * of non-confidence, so we need to split
1125 * it into 2 events: active MT_TOOL_PALM
1126 * and a separate liftoff.
1127 */
1128 active = true;
1129 set_bit(slotnum, app->pending_palm_slots);
1130 }
1131 }
1132
1133 input_mt_slot(input, slotnum);
1134 input_mt_report_slot_state(input, tool, active);
1135 if (active) {
1136 /* this finger is in proximity of the sensor */
1137 int wide = (*slot->w > *slot->h);
1138 int major = max(*slot->w, *slot->h);
1139 int minor = min(*slot->w, *slot->h);
1140 int orientation = wide;
1141 int max_azimuth;
1142 int azimuth;
1143 int x;
1144 int y;
1145 int cx;
1146 int cy;
1147
1148 if (slot->a != DEFAULT_ZERO) {
1149 /*
1150 * Azimuth is counter-clockwise and ranges from [0, MAX)
1151 * (a full revolution). Convert it to clockwise ranging
1152 * [-MAX/2, MAX/2].
1153 *
1154 * Note that ABS_MT_ORIENTATION require us to report
1155 * the limit of [-MAX/4, MAX/4], but the value can go
1156 * out of range to [-MAX/2, MAX/2] to report an upside
1157 * down ellipsis.
1158 */
1159 azimuth = *slot->a;
1160 max_azimuth = input_abs_get_max(input,
1161 ABS_MT_ORIENTATION);
1162 if (azimuth > max_azimuth * 2)
1163 azimuth -= max_azimuth * 4;
1164 orientation = -azimuth;
1165 if (quirks & MT_QUIRK_ORIENTATION_INVERT)
1166 orientation = -orientation;
1167
1168 }
1169
1170 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1171 /*
1172 * divided by two to match visual scale of touch
1173 * for devices with this quirk
1174 */
1175 major = major >> 1;
1176 minor = minor >> 1;
1177 }
1178
1179 if (td->is_haptic_touchpad)
1180 hid_haptic_pressure_increase(td->haptic, *slot->p);
1181
1182 x = hdev->quirks & HID_QUIRK_X_INVERT ?
1183 input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->x :
1184 *slot->x;
1185 y = hdev->quirks & HID_QUIRK_Y_INVERT ?
1186 input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->y :
1187 *slot->y;
1188 cx = hdev->quirks & HID_QUIRK_X_INVERT ?
1189 input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->cx :
1190 *slot->cx;
1191 cy = hdev->quirks & HID_QUIRK_Y_INVERT ?
1192 input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->cy :
1193 *slot->cy;
1194
1195 input_event(input, EV_ABS, ABS_MT_POSITION_X, x);
1196 input_event(input, EV_ABS, ABS_MT_POSITION_Y, y);
1197 input_event(input, EV_ABS, ABS_MT_TOOL_X, cx);
1198 input_event(input, EV_ABS, ABS_MT_TOOL_Y, cy);
1199 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1200 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1201 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1202 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1203 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1204
1205 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1206 }
1207
1208 return 0;
1209 }
1210
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)1211 static void mt_process_mt_event(struct hid_device *hid,
1212 struct mt_application *app,
1213 struct hid_field *field,
1214 struct hid_usage *usage,
1215 __s32 value,
1216 bool first_packet)
1217 {
1218 __s32 quirks = app->quirks;
1219 struct input_dev *input = field->hidinput->input;
1220
1221 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1222 return;
1223
1224 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1225
1226 /*
1227 * For Win8 PTP touchpads we should only look at
1228 * non finger/touch events in the first_packet of a
1229 * (possible) multi-packet frame.
1230 */
1231 if (!first_packet)
1232 return;
1233
1234 /*
1235 * For Win8 PTP touchpads we map both the clickpad click
1236 * and any "external" left buttons to BTN_LEFT if a
1237 * device claims to have both we need to report 1 for
1238 * BTN_LEFT if either is pressed, so we or all values
1239 * together and report the result in mt_sync_frame().
1240 */
1241 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1242 app->left_button_state |= value;
1243 return;
1244 }
1245 }
1246
1247 input_event(input, usage->type, usage->code, value);
1248 }
1249
mt_touch_report(struct hid_device * hid,struct mt_report_data * rdata)1250 static void mt_touch_report(struct hid_device *hid,
1251 struct mt_report_data *rdata)
1252 {
1253 struct mt_device *td = hid_get_drvdata(hid);
1254 struct hid_report *report = rdata->report;
1255 struct mt_application *app = rdata->application;
1256 struct hid_field *field;
1257 struct input_dev *input;
1258 struct mt_usages *slot;
1259 bool first_packet;
1260 unsigned count;
1261 int r, n;
1262 int scantime = 0;
1263 int contact_count = -1;
1264
1265 /* sticky fingers release in progress, abort */
1266 if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1267 return;
1268
1269 scantime = *app->scantime;
1270 app->timestamp = mt_compute_timestamp(app, scantime);
1271 if (app->raw_cc != DEFAULT_ZERO)
1272 contact_count = *app->raw_cc;
1273
1274 /*
1275 * Includes multi-packet support where subsequent
1276 * packets are sent with zero contactcount.
1277 */
1278 if (contact_count >= 0) {
1279 /*
1280 * For Win8 PTPs the first packet (td->num_received == 0) may
1281 * have a contactcount of 0 if there only is a button event.
1282 * We double check that this is not a continuation packet
1283 * of a possible multi-packet frame be checking that the
1284 * timestamp has changed.
1285 */
1286 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1287 app->num_received == 0 &&
1288 app->prev_scantime != scantime)
1289 app->num_expected = contact_count;
1290 /* A non 0 contact count always indicates a first packet */
1291 else if (contact_count)
1292 app->num_expected = contact_count;
1293 }
1294 app->prev_scantime = scantime;
1295
1296 first_packet = app->num_received == 0;
1297
1298 input = report->field[0]->hidinput->input;
1299
1300 list_for_each_entry(slot, &app->mt_usages, list) {
1301 if (!mt_process_slot(td, input, app, slot))
1302 app->num_received++;
1303 }
1304
1305 for (r = 0; r < report->maxfield; r++) {
1306 field = report->field[r];
1307 count = field->report_count;
1308
1309 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1310 continue;
1311
1312 for (n = 0; n < count; n++)
1313 mt_process_mt_event(hid, app, field,
1314 &field->usage[n], field->value[n],
1315 first_packet);
1316 }
1317
1318 if (app->num_received >= app->num_expected)
1319 mt_sync_frame(td, app, input);
1320
1321 /*
1322 * Windows 8 specs says 2 things:
1323 * - once a contact has been reported, it has to be reported in each
1324 * subsequent report
1325 * - the report rate when fingers are present has to be at least
1326 * the refresh rate of the screen, 60 or 120 Hz
1327 *
1328 * I interprete this that the specification forces a report rate of
1329 * at least 60 Hz for a touchscreen to be certified.
1330 * Which means that if we do not get a report whithin 16 ms, either
1331 * something wrong happens, either the touchscreen forgets to send
1332 * a release. Taking a reasonable margin allows to remove issues
1333 * with USB communication or the load of the machine.
1334 *
1335 * Given that Win 8 devices are forced to send a release, this will
1336 * only affect laggish machines and the ones that have a firmware
1337 * defect.
1338 */
1339 if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1340 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1341 mod_timer(&td->release_timer,
1342 jiffies + msecs_to_jiffies(100));
1343 else
1344 timer_delete(&td->release_timer);
1345 }
1346
1347 clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1348 }
1349
mt_touch_input_configured(struct hid_device * hdev,struct hid_input * hi,struct mt_application * app)1350 static int mt_touch_input_configured(struct hid_device *hdev,
1351 struct hid_input *hi,
1352 struct mt_application *app)
1353 {
1354 struct mt_device *td = hid_get_drvdata(hdev);
1355 struct mt_class *cls = &td->mtclass;
1356 struct input_dev *input = hi->input;
1357 int ret;
1358
1359 /*
1360 * HID_DG_CONTACTMAX field is not present on Apple Touch Bars,
1361 * but the maximum contact count is greater than the default.
1362 */
1363 if (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR && cls->maxcontacts)
1364 td->maxcontacts = cls->maxcontacts;
1365
1366 if (!td->maxcontacts)
1367 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1368
1369 mt_post_parse(td, app);
1370 if (td->serial_maybe)
1371 mt_post_parse_default_settings(td, app);
1372
1373 /*
1374 * The application for Apple Touch Bars is HID_DG_TOUCHPAD,
1375 * but these devices are direct.
1376 */
1377 if (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR)
1378 app->mt_flags |= INPUT_MT_DIRECT;
1379
1380 if (cls->is_indirect)
1381 app->mt_flags |= INPUT_MT_POINTER;
1382
1383 if (td->is_haptic_touchpad)
1384 app->mt_flags |= INPUT_MT_TOTAL_FORCE;
1385
1386 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1387 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1388
1389 /* check for clickpads */
1390 if ((app->mt_flags & INPUT_MT_POINTER) &&
1391 (app->buttons_count == 1))
1392 td->is_buttonpad = true;
1393
1394 if (td->is_buttonpad)
1395 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1396
1397 app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1398 BITS_TO_LONGS(td->maxcontacts),
1399 sizeof(long),
1400 GFP_KERNEL);
1401 if (!app->pending_palm_slots)
1402 return -ENOMEM;
1403
1404 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1405 if (ret)
1406 return ret;
1407
1408 app->mt_flags = 0;
1409 return 0;
1410 }
1411
1412 #define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1413 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)1414 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1415 struct hid_field *field, struct hid_usage *usage,
1416 unsigned long **bit, int *max)
1417 {
1418 struct mt_device *td = hid_get_drvdata(hdev);
1419 struct mt_application *application;
1420 struct mt_report_data *rdata;
1421 int ret;
1422
1423 rdata = mt_find_report_data(td, field->report);
1424 if (!rdata) {
1425 hid_err(hdev, "failed to allocate data for report\n");
1426 return 0;
1427 }
1428
1429 application = rdata->application;
1430
1431 /*
1432 * If mtclass.export_all_inputs is not set, only map fields from
1433 * TouchScreen or TouchPad collections. We need to ignore fields
1434 * that belong to other collections such as Mouse that might have
1435 * the same GenericDesktop usages.
1436 */
1437 if (!td->mtclass.export_all_inputs &&
1438 field->application != HID_DG_TOUCHSCREEN &&
1439 field->application != HID_DG_PEN &&
1440 field->application != HID_DG_TOUCHPAD &&
1441 field->application != HID_GD_KEYBOARD &&
1442 field->application != HID_GD_SYSTEM_CONTROL &&
1443 field->application != HID_CP_CONSUMER_CONTROL &&
1444 field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1445 field->application != HID_GD_SYSTEM_MULTIAXIS &&
1446 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1447 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1448 return -1;
1449
1450 /*
1451 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1452 * touchpad report descriptor. We need to treat these as an array to
1453 * map usages to input keys.
1454 */
1455 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1456 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1457 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1458 set_bit(EV_REP, hi->input->evbit);
1459 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1460 field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1461 switch (usage->hid & HID_USAGE) {
1462 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
1463 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
1464 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
1465 case 0x6b: mt_map_key_clear(KEY_F21); break;
1466 case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
1467 default:
1468 return -1;
1469 }
1470 return 1;
1471 }
1472
1473 if (rdata->is_mt_collection)
1474 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1475 application);
1476
1477 /*
1478 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1479 * for the stylus. Overwrite the hid_input application
1480 */
1481 if (field->physical == HID_DG_STYLUS)
1482 hi->application = HID_DG_STYLUS;
1483
1484 ret = hid_haptic_input_mapping(hdev, td->haptic, hi, field, usage, bit,
1485 max);
1486 if (ret != 0)
1487 return ret;
1488
1489 /* let hid-core decide for the others */
1490 return 0;
1491 }
1492
mt_input_mapped(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)1493 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1494 struct hid_field *field, struct hid_usage *usage,
1495 unsigned long **bit, int *max)
1496 {
1497 struct mt_device *td = hid_get_drvdata(hdev);
1498 struct mt_report_data *rdata;
1499
1500 rdata = mt_find_report_data(td, field->report);
1501 if (rdata && rdata->is_mt_collection) {
1502 /* We own these mappings, tell hid-input to ignore them */
1503 return -1;
1504 }
1505
1506 /* let hid-core decide for the others */
1507 return 0;
1508 }
1509
mt_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1510 static int mt_event(struct hid_device *hid, struct hid_field *field,
1511 struct hid_usage *usage, __s32 value)
1512 {
1513 struct mt_device *td = hid_get_drvdata(hid);
1514 struct mt_report_data *rdata;
1515
1516 rdata = mt_find_report_data(td, field->report);
1517 if (rdata && rdata->is_mt_collection)
1518 return mt_touch_event(hid, field, usage, value);
1519
1520 return 0;
1521 }
1522
mt_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * size)1523 static const __u8 *mt_report_fixup(struct hid_device *hdev, __u8 *rdesc,
1524 unsigned int *size)
1525 {
1526 if (hdev->vendor == I2C_VENDOR_ID_GOODIX &&
1527 (hdev->product == I2C_DEVICE_ID_GOODIX_01E8 ||
1528 hdev->product == I2C_DEVICE_ID_GOODIX_01E9)) {
1529 if (*size < 608) {
1530 dev_info(
1531 &hdev->dev,
1532 "GT7868Q fixup: report descriptor is only %u bytes, skipping\n",
1533 *size);
1534 return rdesc;
1535 }
1536
1537 if (rdesc[607] == 0x15) {
1538 rdesc[607] = 0x25;
1539 dev_info(
1540 &hdev->dev,
1541 "GT7868Q report descriptor fixup is applied.\n");
1542 } else {
1543 dev_info(
1544 &hdev->dev,
1545 "The byte is not expected for fixing the report descriptor. \
1546 It's possible that the touchpad firmware is not suitable for applying the fix. \
1547 got: %x\n",
1548 rdesc[607]);
1549 }
1550 }
1551
1552 return rdesc;
1553 }
1554
mt_report(struct hid_device * hid,struct hid_report * report)1555 static void mt_report(struct hid_device *hid, struct hid_report *report)
1556 {
1557 struct mt_device *td = hid_get_drvdata(hid);
1558 struct hid_field *field = report->field[0];
1559 struct mt_report_data *rdata;
1560
1561 if (!(hid->claimed & HID_CLAIMED_INPUT))
1562 return;
1563
1564 rdata = mt_find_report_data(td, report);
1565 if (rdata && rdata->is_mt_collection)
1566 return mt_touch_report(hid, rdata);
1567
1568 if (field && field->hidinput && field->hidinput->input)
1569 input_sync(field->hidinput->input);
1570 }
1571
mt_need_to_apply_feature(struct hid_device * hdev,struct hid_field * field,struct hid_usage * usage,enum latency_mode latency,enum report_mode report_mode,bool * inputmode_found)1572 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1573 struct hid_field *field,
1574 struct hid_usage *usage,
1575 enum latency_mode latency,
1576 enum report_mode report_mode,
1577 bool *inputmode_found)
1578 {
1579 struct mt_device *td = hid_get_drvdata(hdev);
1580 struct mt_class *cls = &td->mtclass;
1581 struct hid_report *report = field->report;
1582 unsigned int index = usage->usage_index;
1583 char *buf;
1584 u32 report_len;
1585 int max;
1586
1587 switch (usage->hid) {
1588 case HID_DG_INPUTMODE:
1589 /*
1590 * Some elan panels wrongly declare 2 input mode features,
1591 * and silently ignore when we set the value in the second
1592 * field. Skip the second feature and hope for the best.
1593 */
1594 if (*inputmode_found)
1595 return false;
1596
1597 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1598 report_len = hid_report_len(report);
1599 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1600 if (!buf) {
1601 hid_err(hdev,
1602 "failed to allocate buffer for report\n");
1603 return false;
1604 }
1605 hid_hw_raw_request(hdev, report->id, buf, report_len,
1606 HID_FEATURE_REPORT,
1607 HID_REQ_GET_REPORT);
1608 kfree(buf);
1609 }
1610
1611 field->value[index] = td->inputmode_value;
1612 *inputmode_found = true;
1613 return true;
1614
1615 case HID_DG_CONTACTMAX:
1616 if (cls->maxcontacts) {
1617 max = min_t(int, field->logical_maximum,
1618 cls->maxcontacts);
1619 if (field->value[index] != max) {
1620 field->value[index] = max;
1621 return true;
1622 }
1623 }
1624 break;
1625
1626 case HID_DG_LATENCYMODE:
1627 field->value[index] = latency;
1628 return true;
1629
1630 case HID_DG_SURFACESWITCH:
1631 field->value[index] = !!(report_mode & TOUCHPAD_REPORT_CONTACTS);
1632 return true;
1633
1634 case HID_DG_BUTTONSWITCH:
1635 field->value[index] = !!(report_mode & TOUCHPAD_REPORT_BUTTONS);
1636 return true;
1637 }
1638
1639 return false; /* no need to update the report */
1640 }
1641
mt_set_modes(struct hid_device * hdev,enum latency_mode latency,enum report_mode report_mode)1642 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1643 enum report_mode report_mode)
1644 {
1645 struct hid_report_enum *rep_enum;
1646 struct hid_report *rep;
1647 struct hid_usage *usage;
1648 int i, j;
1649 bool update_report;
1650 bool inputmode_found = false;
1651
1652 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1653 list_for_each_entry(rep, &rep_enum->report_list, list) {
1654 update_report = false;
1655
1656 for (i = 0; i < rep->maxfield; i++) {
1657 /* Ignore if report count is out of bounds. */
1658 if (rep->field[i]->report_count < 1)
1659 continue;
1660
1661 for (j = 0; j < rep->field[i]->maxusage; j++) {
1662 usage = &rep->field[i]->usage[j];
1663
1664 if (mt_need_to_apply_feature(hdev,
1665 rep->field[i],
1666 usage,
1667 latency,
1668 report_mode,
1669 &inputmode_found))
1670 update_report = true;
1671 }
1672 }
1673
1674 if (update_report)
1675 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1676 }
1677 }
1678
mt_post_parse_default_settings(struct mt_device * td,struct mt_application * app)1679 static void mt_post_parse_default_settings(struct mt_device *td,
1680 struct mt_application *app)
1681 {
1682 __s32 quirks = app->quirks;
1683
1684 /* unknown serial device needs special quirks */
1685 if (list_is_singular(&app->mt_usages)) {
1686 quirks |= MT_QUIRK_ALWAYS_VALID;
1687 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1688 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1689 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1690 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1691 }
1692
1693 app->quirks = quirks;
1694 }
1695
mt_post_parse(struct mt_device * td,struct mt_application * app)1696 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1697 {
1698 if (!app->have_contact_count)
1699 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1700 }
1701
mt_input_configured(struct hid_device * hdev,struct hid_input * hi)1702 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1703 {
1704 struct mt_device *td = hid_get_drvdata(hdev);
1705 const char *suffix = NULL;
1706 struct mt_report_data *rdata;
1707 struct mt_application *mt_application = NULL;
1708 struct hid_report *report;
1709 int ret;
1710
1711 if (td->is_haptic_touchpad && (td->mtclass.name == MT_CLS_WIN_8 ||
1712 td->mtclass.name == MT_CLS_WIN_8_FORCE_MULTI_INPUT)) {
1713 if (hid_haptic_input_configured(hdev, td->haptic, hi) == 0)
1714 td->is_haptic_touchpad = false;
1715 } else {
1716 td->is_haptic_touchpad = false;
1717 }
1718
1719 list_for_each_entry(report, &hi->reports, hidinput_list) {
1720 rdata = mt_find_report_data(td, report);
1721 if (!rdata) {
1722 hid_err(hdev, "failed to allocate data for report\n");
1723 return -ENOMEM;
1724 }
1725
1726 mt_application = rdata->application;
1727
1728 if (rdata->is_mt_collection) {
1729 ret = mt_touch_input_configured(hdev, hi,
1730 mt_application);
1731 if (ret)
1732 return ret;
1733 }
1734 }
1735
1736 switch (hi->application) {
1737 case HID_GD_KEYBOARD:
1738 case HID_GD_KEYPAD:
1739 case HID_GD_MOUSE:
1740 case HID_DG_TOUCHPAD:
1741 case HID_GD_SYSTEM_CONTROL:
1742 case HID_CP_CONSUMER_CONTROL:
1743 case HID_GD_WIRELESS_RADIO_CTLS:
1744 case HID_GD_SYSTEM_MULTIAXIS:
1745 /* already handled by hid core */
1746 break;
1747 case HID_DG_TOUCHSCREEN:
1748 /* we do not set suffix = "Touchscreen" */
1749 hi->input->name = hdev->name;
1750 break;
1751 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1752 suffix = "Custom Media Keys";
1753 break;
1754 case HID_DG_STYLUS:
1755 /* force BTN_STYLUS to allow tablet matching in udev */
1756 __set_bit(BTN_STYLUS, hi->input->keybit);
1757 break;
1758 default:
1759 suffix = "UNKNOWN";
1760 break;
1761 }
1762
1763 if (suffix) {
1764 hi->input->name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
1765 "%s %s", hdev->name, suffix);
1766 if (!hi->input->name)
1767 return -ENOMEM;
1768 }
1769
1770 return 0;
1771 }
1772
mt_fix_const_field(struct hid_field * field,unsigned int usage)1773 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1774 {
1775 if (field->usage[0].hid != usage ||
1776 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1777 return;
1778
1779 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1780 field->flags |= HID_MAIN_ITEM_VARIABLE;
1781 }
1782
mt_fix_const_fields(struct hid_device * hdev,unsigned int usage)1783 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1784 {
1785 struct hid_report *report;
1786 int i;
1787
1788 list_for_each_entry(report,
1789 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1790 list) {
1791
1792 if (!report->maxfield)
1793 continue;
1794
1795 for (i = 0; i < report->maxfield; i++)
1796 if (report->field[i]->maxusage >= 1)
1797 mt_fix_const_field(report->field[i], usage);
1798 }
1799 }
1800
mt_release_contacts(struct hid_device * hid)1801 static void mt_release_contacts(struct hid_device *hid)
1802 {
1803 struct hid_input *hidinput;
1804 struct mt_application *application;
1805 struct mt_device *td = hid_get_drvdata(hid);
1806
1807 list_for_each_entry(hidinput, &hid->inputs, list) {
1808 struct input_dev *input_dev = hidinput->input;
1809 struct input_mt *mt = input_dev->mt;
1810 int i;
1811
1812 if (mt) {
1813 for (i = 0; i < mt->num_slots; i++) {
1814 input_mt_slot(input_dev, i);
1815 input_mt_report_slot_inactive(input_dev);
1816 }
1817 input_mt_sync_frame(input_dev);
1818 input_sync(input_dev);
1819 }
1820 }
1821
1822 list_for_each_entry(application, &td->applications, list) {
1823 application->num_received = 0;
1824 }
1825 }
1826
mt_expired_timeout(struct timer_list * t)1827 static void mt_expired_timeout(struct timer_list *t)
1828 {
1829 struct mt_device *td = timer_container_of(td, t, release_timer);
1830 struct hid_device *hdev = td->hdev;
1831
1832 /*
1833 * An input report came in just before we release the sticky fingers,
1834 * it will take care of the sticky fingers.
1835 */
1836 if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1837 return;
1838 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1839 mt_release_contacts(hdev);
1840 clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1841 }
1842
mt_probe(struct hid_device * hdev,const struct hid_device_id * id)1843 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1844 {
1845 int ret, i;
1846 struct mt_device *td;
1847 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1848
1849 for (i = 0; mt_classes[i].name ; i++) {
1850 if (id->driver_data == mt_classes[i].name) {
1851 mtclass = &(mt_classes[i]);
1852 break;
1853 }
1854 }
1855
1856 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1857 if (!td) {
1858 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1859 return -ENOMEM;
1860 }
1861 td->haptic = devm_kzalloc(&hdev->dev, sizeof(*(td->haptic)), GFP_KERNEL);
1862 if (!td->haptic)
1863 return -ENOMEM;
1864
1865 td->haptic->hdev = hdev;
1866 td->hdev = hdev;
1867 td->mtclass = *mtclass;
1868 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1869 hid_set_drvdata(hdev, td);
1870
1871 INIT_LIST_HEAD(&td->applications);
1872 INIT_LIST_HEAD(&td->reports);
1873
1874 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1875 td->serial_maybe = true;
1876
1877
1878 /* Orientation is inverted if the X or Y axes are
1879 * flipped, but normalized if both are inverted.
1880 */
1881 if (hdev->quirks & (HID_QUIRK_X_INVERT | HID_QUIRK_Y_INVERT) &&
1882 !((hdev->quirks & HID_QUIRK_X_INVERT)
1883 && (hdev->quirks & HID_QUIRK_Y_INVERT)))
1884 td->mtclass.quirks = MT_QUIRK_ORIENTATION_INVERT;
1885
1886 /* This allows the driver to correctly support devices
1887 * that emit events over several HID messages.
1888 */
1889 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1890
1891 /*
1892 * This allows the driver to handle different input sensors
1893 * that emits events through different applications on the same HID
1894 * device.
1895 */
1896 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1897
1898 if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1899 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1900
1901 if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) {
1902 hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP;
1903 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1904 }
1905
1906 timer_setup(&td->release_timer, mt_expired_timeout, 0);
1907
1908 ret = hid_parse(hdev);
1909 if (ret != 0)
1910 return ret;
1911
1912 if (mtclass->name == MT_CLS_APPLE_TOUCHBAR &&
1913 !hid_find_field(hdev, HID_INPUT_REPORT,
1914 HID_DG_TOUCHPAD, HID_DG_TRANSDUCER_INDEX))
1915 return -ENODEV;
1916
1917 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1918 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1919
1920 if (hdev->vendor == USB_VENDOR_ID_SIS_TOUCH)
1921 hdev->quirks |= HID_QUIRK_NOGET;
1922
1923 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1924 if (ret)
1925 return ret;
1926
1927 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1928 if (ret)
1929 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1930 hdev->name);
1931
1932 mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1933
1934 if (td->is_haptic_touchpad) {
1935 if (hid_haptic_init(hdev, &td->haptic)) {
1936 dev_warn(&hdev->dev, "Cannot allocate haptic for %s\n",
1937 hdev->name);
1938 td->is_haptic_touchpad = false;
1939 devm_kfree(&hdev->dev, td->haptic);
1940 }
1941 } else {
1942 devm_kfree(&hdev->dev, td->haptic);
1943 }
1944
1945 return 0;
1946 }
1947
mt_suspend(struct hid_device * hdev,pm_message_t state)1948 static int mt_suspend(struct hid_device *hdev, pm_message_t state)
1949 {
1950 struct mt_device *td = hid_get_drvdata(hdev);
1951
1952 /* High latency is desirable for power savings during S3/S0ix */
1953 if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) ||
1954 !hid_hw_may_wakeup(hdev))
1955 mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_NONE);
1956 else
1957 mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_ALL);
1958
1959 return 0;
1960 }
1961
mt_reset_resume(struct hid_device * hdev)1962 static int mt_reset_resume(struct hid_device *hdev)
1963 {
1964 mt_release_contacts(hdev);
1965 mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1966 return 0;
1967 }
1968
mt_resume(struct hid_device * hdev)1969 static int mt_resume(struct hid_device *hdev)
1970 {
1971 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1972 * It should be safe to send it to other devices too.
1973 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1974
1975 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1976
1977 mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1978
1979 return 0;
1980 }
1981
mt_remove(struct hid_device * hdev)1982 static void mt_remove(struct hid_device *hdev)
1983 {
1984 struct mt_device *td = hid_get_drvdata(hdev);
1985
1986 timer_delete_sync(&td->release_timer);
1987
1988 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1989 hid_hw_stop(hdev);
1990 }
1991
mt_on_hid_hw_open(struct hid_device * hdev)1992 static void mt_on_hid_hw_open(struct hid_device *hdev)
1993 {
1994 mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1995 }
1996
mt_on_hid_hw_close(struct hid_device * hdev)1997 static void mt_on_hid_hw_close(struct hid_device *hdev)
1998 {
1999 mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_NONE);
2000 }
2001
2002 /*
2003 * This list contains only:
2004 * - VID/PID of products not working with the default multitouch handling
2005 * - 2 generic rules.
2006 * So there is no point in adding here any device with MT_CLS_DEFAULT.
2007 */
2008 static const struct hid_device_id mt_devices[] = {
2009
2010 /* 3M panels */
2011 { .driver_data = MT_CLS_3M,
2012 MT_USB_DEVICE(USB_VENDOR_ID_3M,
2013 USB_DEVICE_ID_3M1968) },
2014 { .driver_data = MT_CLS_3M,
2015 MT_USB_DEVICE(USB_VENDOR_ID_3M,
2016 USB_DEVICE_ID_3M2256) },
2017 { .driver_data = MT_CLS_3M,
2018 MT_USB_DEVICE(USB_VENDOR_ID_3M,
2019 USB_DEVICE_ID_3M3266) },
2020
2021 /* Anton devices */
2022 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
2023 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
2024 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
2025
2026 /* Asus T101HA */
2027 { .driver_data = MT_CLS_WIN_8_DISABLE_WAKEUP,
2028 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2029 USB_VENDOR_ID_ASUSTEK,
2030 USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD) },
2031
2032 /* Asus T304UA */
2033 { .driver_data = MT_CLS_ASUS,
2034 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2035 USB_VENDOR_ID_ASUSTEK,
2036 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
2037
2038 /* Atmel panels */
2039 { .driver_data = MT_CLS_SERIAL,
2040 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
2041 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
2042
2043 /* Baanto multitouch devices */
2044 { .driver_data = MT_CLS_NSMU,
2045 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
2046 USB_DEVICE_ID_BAANTO_MT_190W2) },
2047
2048 /* Cando panels */
2049 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
2050 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2051 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
2052 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
2053 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2054 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
2055
2056 /* Chunghwa Telecom touch panels */
2057 { .driver_data = MT_CLS_NSMU,
2058 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
2059 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
2060
2061 /* CJTouch panels */
2062 { .driver_data = MT_CLS_NSMU,
2063 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
2064 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
2065 { .driver_data = MT_CLS_NSMU,
2066 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
2067 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
2068
2069 /* CVTouch panels */
2070 { .driver_data = MT_CLS_NSMU,
2071 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
2072 USB_DEVICE_ID_CVTOUCH_SCREEN) },
2073
2074 /* eGalax devices (SAW) */
2075 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
2076 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2077 USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER) },
2078
2079 /* eGalax devices (resistive) */
2080 { .driver_data = MT_CLS_EGALAX,
2081 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2082 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
2083 { .driver_data = MT_CLS_EGALAX,
2084 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2085 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
2086
2087 /* eGalax devices (capacitive) */
2088 { .driver_data = MT_CLS_EGALAX_SERIAL,
2089 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2090 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
2091 { .driver_data = MT_CLS_EGALAX,
2092 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2093 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
2094 { .driver_data = MT_CLS_EGALAX_SERIAL,
2095 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2096 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
2097 { .driver_data = MT_CLS_EGALAX_SERIAL,
2098 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2099 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
2100 { .driver_data = MT_CLS_EGALAX_SERIAL,
2101 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2102 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
2103 { .driver_data = MT_CLS_EGALAX_SERIAL,
2104 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2105 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
2106 { .driver_data = MT_CLS_EGALAX,
2107 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2108 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
2109 { .driver_data = MT_CLS_EGALAX,
2110 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2111 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
2112 { .driver_data = MT_CLS_EGALAX_SERIAL,
2113 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2114 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
2115 { .driver_data = MT_CLS_EGALAX,
2116 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
2117 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
2118 { .driver_data = MT_CLS_EGALAX,
2119 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
2120 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
2121 { .driver_data = MT_CLS_EGALAX,
2122 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2123 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
2124 { .driver_data = MT_CLS_EGALAX,
2125 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2126 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
2127 { .driver_data = MT_CLS_EGALAX_SERIAL,
2128 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2129 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
2130 { .driver_data = MT_CLS_EGALAX_SERIAL,
2131 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2132 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
2133 { .driver_data = MT_CLS_EGALAX_SERIAL,
2134 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2135 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
2136 { .driver_data = MT_CLS_EGALAX,
2137 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2138 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
2139
2140 /* Elan devices */
2141 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2142 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2143 USB_VENDOR_ID_ELAN, 0x313a) },
2144
2145 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2146 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2147 USB_VENDOR_ID_ELAN, 0x3148) },
2148
2149 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2150 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2151 USB_VENDOR_ID_ELAN, 0x32ae) },
2152
2153 /* Elitegroup panel */
2154 { .driver_data = MT_CLS_SERIAL,
2155 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
2156 USB_DEVICE_ID_ELITEGROUP_05D8) },
2157
2158 /* Flatfrog Panels */
2159 { .driver_data = MT_CLS_FLATFROG,
2160 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
2161 USB_DEVICE_ID_MULTITOUCH_3200) },
2162
2163 /* FocalTech Panels */
2164 { .driver_data = MT_CLS_SERIAL,
2165 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
2166 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
2167
2168 /* GeneralTouch panel */
2169 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2170 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2171 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
2172 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2173 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2174 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
2175 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2176 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2177 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
2178 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2179 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2180 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
2181 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2182 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2183 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
2184 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2185 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2186 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
2187 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2188 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2189 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
2190
2191 /* Gametel game controller */
2192 { .driver_data = MT_CLS_NSMU,
2193 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
2194 USB_DEVICE_ID_GAMETEL_MT_MODE) },
2195
2196 /* Goodix GT7868Q devices */
2197 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2198 HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX,
2199 I2C_DEVICE_ID_GOODIX_01E8) },
2200 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2201 HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX,
2202 I2C_DEVICE_ID_GOODIX_01E9) },
2203
2204 /* GoodTouch panels */
2205 { .driver_data = MT_CLS_NSMU,
2206 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
2207 USB_DEVICE_ID_GOODTOUCH_000f) },
2208
2209 /* Hanvon panels */
2210 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2211 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
2212 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
2213
2214 /* HONOR GLO-GXXX panel */
2215 { .driver_data = MT_CLS_VTL,
2216 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2217 0x347d, 0x7853) },
2218
2219 /* HONOR MagicBook Art 14 touchpad */
2220 { .driver_data = MT_CLS_VTL,
2221 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2222 0x35cc, 0x0104) },
2223
2224 /* Ilitek dual touch panel */
2225 { .driver_data = MT_CLS_NSMU,
2226 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
2227 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
2228
2229 /* LG Melfas panel */
2230 { .driver_data = MT_CLS_LG,
2231 HID_USB_DEVICE(USB_VENDOR_ID_LG,
2232 USB_DEVICE_ID_LG_MELFAS_MT) },
2233 { .driver_data = MT_CLS_LG,
2234 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
2235 USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
2236
2237 /* Lenovo X1 TAB Gen 1 */
2238 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2239 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2240 USB_VENDOR_ID_LENOVO,
2241 USB_DEVICE_ID_LENOVO_X1_TAB) },
2242
2243 /* Lenovo X1 TAB Gen 2 */
2244 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2245 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2246 USB_VENDOR_ID_LENOVO,
2247 USB_DEVICE_ID_LENOVO_X1_TAB2) },
2248
2249 /* Lenovo X1 TAB Gen 3 */
2250 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2251 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2252 USB_VENDOR_ID_LENOVO,
2253 USB_DEVICE_ID_LENOVO_X1_TAB3) },
2254
2255 /* Lenovo X12 TAB Gen 1 */
2256 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2257 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2258 USB_VENDOR_ID_LENOVO,
2259 USB_DEVICE_ID_LENOVO_X12_TAB) },
2260
2261 /* Lenovo X12 TAB Gen 2 */
2262 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2263 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2264 USB_VENDOR_ID_LENOVO,
2265 USB_DEVICE_ID_LENOVO_X12_TAB2) },
2266
2267 /* Logitech devices */
2268 { .driver_data = MT_CLS_NSMU,
2269 HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH_WIN_8,
2270 USB_VENDOR_ID_LOGITECH,
2271 USB_DEVICE_ID_LOGITECH_CASA_TOUCHPAD) },
2272 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2273 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2274 USB_VENDOR_ID_LOGITECH,
2275 USB_DEVICE_ID_LOGITECH_BOLT_RECEIVER) },
2276
2277 /* MosArt panels */
2278 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2279 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2280 USB_DEVICE_ID_ASUS_T91MT)},
2281 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2282 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2283 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
2284 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2285 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
2286 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
2287
2288 /* Novatek Panel */
2289 { .driver_data = MT_CLS_NSMU,
2290 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2291 USB_DEVICE_ID_NOVATEK_PCT) },
2292
2293 /* Ntrig Panel */
2294 { .driver_data = MT_CLS_NSMU,
2295 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2296 USB_VENDOR_ID_NTRIG, 0x1b05) },
2297
2298 /* Panasonic panels */
2299 { .driver_data = MT_CLS_PANASONIC,
2300 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2301 USB_DEVICE_ID_PANABOARD_UBT780) },
2302 { .driver_data = MT_CLS_PANASONIC,
2303 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2304 USB_DEVICE_ID_PANABOARD_UBT880) },
2305
2306 /* PixArt optical touch screen */
2307 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2308 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2309 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2310 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2311 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2312 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2313 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2314 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2315 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2316
2317 /* PixCir-based panels */
2318 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2319 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2320 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2321
2322 /* Quanta-based panels */
2323 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2324 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2325 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2326
2327 /* Razer touchpads */
2328 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2329 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2330 USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2331
2332 /* Smart Tech panels */
2333 { .driver_data = MT_CLS_SMART_TECH,
2334 MT_USB_DEVICE(0x0b8c, 0x0092)},
2335
2336 /* Stantum panels */
2337 { .driver_data = MT_CLS_CONFIDENCE,
2338 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2339 USB_DEVICE_ID_MTP_STM)},
2340
2341 /* Synaptics devices */
2342 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2343 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2344 USB_VENDOR_ID_SYNAPTICS, 0xcd7e) },
2345
2346 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2347 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2348 USB_VENDOR_ID_SYNAPTICS, 0xcddc) },
2349
2350 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2351 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2352 USB_VENDOR_ID_SYNAPTICS, 0xce08) },
2353
2354 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2355 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2356 USB_VENDOR_ID_SYNAPTICS, 0xce09) },
2357
2358 /* TopSeed panels */
2359 { .driver_data = MT_CLS_TOPSEED,
2360 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2361 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2362
2363 /* Touch International panels */
2364 { .driver_data = MT_CLS_NSMU,
2365 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2366 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2367
2368 /* Unitec panels */
2369 { .driver_data = MT_CLS_NSMU,
2370 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2371 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2372 { .driver_data = MT_CLS_NSMU,
2373 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2374 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2375
2376 /* VTL panels */
2377 { .driver_data = MT_CLS_VTL,
2378 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2379 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2380
2381 /* Winbond Electronics Corp. */
2382 { .driver_data = MT_CLS_WIN_8_NO_STICKY_FINGERS,
2383 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2384 USB_VENDOR_ID_WINBOND, USB_DEVICE_ID_TSTP_MTOUCH) },
2385
2386 /* Wistron panels */
2387 { .driver_data = MT_CLS_NSMU,
2388 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2389 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2390
2391 /* XAT */
2392 { .driver_data = MT_CLS_NSMU,
2393 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2394 USB_DEVICE_ID_XAT_CSR) },
2395
2396 /* Xiroku */
2397 { .driver_data = MT_CLS_NSMU,
2398 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2399 USB_DEVICE_ID_XIROKU_SPX) },
2400 { .driver_data = MT_CLS_NSMU,
2401 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2402 USB_DEVICE_ID_XIROKU_MPX) },
2403 { .driver_data = MT_CLS_NSMU,
2404 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2405 USB_DEVICE_ID_XIROKU_CSR) },
2406 { .driver_data = MT_CLS_NSMU,
2407 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2408 USB_DEVICE_ID_XIROKU_SPX1) },
2409 { .driver_data = MT_CLS_NSMU,
2410 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2411 USB_DEVICE_ID_XIROKU_MPX1) },
2412 { .driver_data = MT_CLS_NSMU,
2413 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2414 USB_DEVICE_ID_XIROKU_CSR1) },
2415 { .driver_data = MT_CLS_NSMU,
2416 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2417 USB_DEVICE_ID_XIROKU_SPX2) },
2418 { .driver_data = MT_CLS_NSMU,
2419 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2420 USB_DEVICE_ID_XIROKU_MPX2) },
2421 { .driver_data = MT_CLS_NSMU,
2422 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2423 USB_DEVICE_ID_XIROKU_CSR2) },
2424
2425 /* Apple Touch Bar */
2426 { .driver_data = MT_CLS_APPLE_TOUCHBAR,
2427 HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
2428 USB_DEVICE_ID_APPLE_TOUCHBAR_DISPLAY) },
2429
2430 /* Google MT devices */
2431 { .driver_data = MT_CLS_GOOGLE,
2432 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2433 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2434 { .driver_data = MT_CLS_GOOGLE,
2435 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_GOOGLE,
2436 USB_DEVICE_ID_GOOGLE_WHISKERS) },
2437
2438 /* sis */
2439 { .driver_data = MT_CLS_SIS,
2440 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_SIS_TOUCH,
2441 HID_ANY_ID) },
2442
2443 /* Hantick */
2444 { .driver_data = MT_CLS_NSMU,
2445 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2446 I2C_VENDOR_ID_HANTICK, I2C_PRODUCT_ID_HANTICK_5288) },
2447
2448 /* Generic MT device */
2449 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2450
2451 /* Generic Win 8 certified MT device */
2452 { .driver_data = MT_CLS_WIN_8,
2453 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2454 HID_ANY_ID, HID_ANY_ID) },
2455 { }
2456 };
2457 MODULE_DEVICE_TABLE(hid, mt_devices);
2458
2459 static const struct hid_usage_id mt_grabbed_usages[] = {
2460 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2461 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2462 };
2463
2464 static struct hid_driver mt_driver = {
2465 .name = "hid-multitouch",
2466 .id_table = mt_devices,
2467 .probe = mt_probe,
2468 .remove = mt_remove,
2469 .input_mapping = mt_input_mapping,
2470 .input_mapped = mt_input_mapped,
2471 .input_configured = mt_input_configured,
2472 .feature_mapping = mt_feature_mapping,
2473 .usage_table = mt_grabbed_usages,
2474 .event = mt_event,
2475 .report_fixup = mt_report_fixup,
2476 .report = mt_report,
2477 .suspend = pm_ptr(mt_suspend),
2478 .reset_resume = pm_ptr(mt_reset_resume),
2479 .resume = pm_ptr(mt_resume),
2480 .on_hid_hw_open = mt_on_hid_hw_open,
2481 .on_hid_hw_close = mt_on_hid_hw_close,
2482 };
2483 module_hid_driver(mt_driver);
2484