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