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 #define MT_BUTTONTYPE_PRESSUREPAD 1
85
86 enum latency_mode {
87 HID_LATENCY_NORMAL = 0,
88 HID_LATENCY_HIGH = 1,
89 };
90
91 enum report_mode {
92 TOUCHPAD_REPORT_NONE = 0,
93 TOUCHPAD_REPORT_BUTTONS = BIT(0),
94 TOUCHPAD_REPORT_CONTACTS = BIT(1),
95 TOUCHPAD_REPORT_ALL = TOUCHPAD_REPORT_BUTTONS | TOUCHPAD_REPORT_CONTACTS,
96 };
97
98 #define MT_IO_SLOTS_MASK GENMASK(7, 0) /* reserve first 8 bits for slot tracking */
99 #define MT_IO_FLAGS_RUNNING 32
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_RUNNING)
176 * first 8 bits are reserved for keeping the slot
177 * states, this is fine because we only support up
178 * to 250 slots (MT_MAX_MAXCONTACT)
179 */
180 __u8 inputmode_value; /* InputMode HID feature value */
181 __u8 maxcontacts;
182 bool is_buttonpad; /* is this device a button pad? */
183 bool is_pressurepad; /* is this device a pressurepad? */
184 bool is_haptic_touchpad; /* is this device a haptic touchpad? */
185 bool serial_maybe; /* need to check for serial protocol */
186
187 struct list_head applications;
188 struct list_head reports;
189 };
190
191 static void mt_post_parse_default_settings(struct mt_device *td,
192 struct mt_application *app);
193 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
194
195 /* classes of device behavior */
196 #define MT_CLS_DEFAULT 0x0001
197
198 #define MT_CLS_SERIAL 0x0002
199 #define MT_CLS_CONFIDENCE 0x0003
200 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
201 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
202 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
203 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
204 /* reserved 0x0008 */
205 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
206 #define MT_CLS_NSMU 0x000a
207 /* reserved 0x0010 */
208 /* reserved 0x0011 */
209 #define MT_CLS_WIN_8 0x0012
210 #define MT_CLS_EXPORT_ALL_INPUTS 0x0013
211 /* reserved 0x0014 */
212 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT 0x0015
213 #define MT_CLS_WIN_8_DISABLE_WAKEUP 0x0016
214 #define MT_CLS_WIN_8_NO_STICKY_FINGERS 0x0017
215 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU 0x0018
216
217 /* vendor specific classes */
218 #define MT_CLS_3M 0x0101
219 /* reserved 0x0102 */
220 #define MT_CLS_EGALAX 0x0103
221 #define MT_CLS_EGALAX_SERIAL 0x0104
222 #define MT_CLS_TOPSEED 0x0105
223 #define MT_CLS_PANASONIC 0x0106
224 #define MT_CLS_FLATFROG 0x0107
225 #define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
226 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
227 #define MT_CLS_LG 0x010a
228 #define MT_CLS_ASUS 0x010b
229 #define MT_CLS_VTL 0x0110
230 #define MT_CLS_GOOGLE 0x0111
231 #define MT_CLS_RAZER_BLADE_STEALTH 0x0112
232 #define MT_CLS_SMART_TECH 0x0113
233 #define MT_CLS_APPLE_TOUCHBAR 0x0114
234 #define MT_CLS_SIS 0x0457
235
236 #define MT_DEFAULT_MAXCONTACT 10
237 #define MT_MAX_MAXCONTACT 250
238
239 /*
240 * Resync device and local timestamps after that many microseconds without
241 * receiving data.
242 */
243 #define MAX_TIMESTAMP_INTERVAL 1000000
244
245 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
246 #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
247
248 /*
249 * these device-dependent functions determine what slot corresponds
250 * to a valid contact that was just read.
251 */
252
cypress_compute_slot(struct mt_application * application,struct mt_usages * slot)253 static int cypress_compute_slot(struct mt_application *application,
254 struct mt_usages *slot)
255 {
256 if (*slot->contactid != 0 || application->num_received == 0)
257 return *slot->contactid;
258 else
259 return -1;
260 }
261
262 static const struct mt_class mt_classes[] = {
263 { .name = MT_CLS_DEFAULT,
264 .quirks = MT_QUIRK_ALWAYS_VALID |
265 MT_QUIRK_CONTACT_CNT_ACCURATE },
266 { .name = MT_CLS_NSMU,
267 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
268 { .name = MT_CLS_SERIAL,
269 .quirks = MT_QUIRK_ALWAYS_VALID},
270 { .name = MT_CLS_CONFIDENCE,
271 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
272 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
273 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
274 MT_QUIRK_SLOT_IS_CONTACTID },
275 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
276 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
277 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
278 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
279 .quirks = MT_QUIRK_VALID_IS_INRANGE |
280 MT_QUIRK_SLOT_IS_CONTACTID,
281 .maxcontacts = 2 },
282 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
283 .quirks = MT_QUIRK_VALID_IS_INRANGE |
284 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
285 .maxcontacts = 2 },
286 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
287 .quirks = MT_QUIRK_VALID_IS_INRANGE |
288 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
289 { .name = MT_CLS_WIN_8,
290 .quirks = MT_QUIRK_ALWAYS_VALID |
291 MT_QUIRK_IGNORE_DUPLICATES |
292 MT_QUIRK_HOVERING |
293 MT_QUIRK_CONTACT_CNT_ACCURATE |
294 MT_QUIRK_STICKY_FINGERS |
295 MT_QUIRK_WIN8_PTP_BUTTONS,
296 .export_all_inputs = true },
297 { .name = MT_CLS_EXPORT_ALL_INPUTS,
298 .quirks = MT_QUIRK_ALWAYS_VALID |
299 MT_QUIRK_CONTACT_CNT_ACCURATE,
300 .export_all_inputs = true },
301 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
302 .quirks = MT_QUIRK_ALWAYS_VALID |
303 MT_QUIRK_IGNORE_DUPLICATES |
304 MT_QUIRK_HOVERING |
305 MT_QUIRK_CONTACT_CNT_ACCURATE |
306 MT_QUIRK_STICKY_FINGERS |
307 MT_QUIRK_WIN8_PTP_BUTTONS |
308 MT_QUIRK_FORCE_MULTI_INPUT,
309 .export_all_inputs = true },
310 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
311 .quirks = MT_QUIRK_IGNORE_DUPLICATES |
312 MT_QUIRK_HOVERING |
313 MT_QUIRK_CONTACT_CNT_ACCURATE |
314 MT_QUIRK_STICKY_FINGERS |
315 MT_QUIRK_WIN8_PTP_BUTTONS |
316 MT_QUIRK_FORCE_MULTI_INPUT |
317 MT_QUIRK_NOT_SEEN_MEANS_UP,
318 .export_all_inputs = true },
319 { .name = MT_CLS_WIN_8_DISABLE_WAKEUP,
320 .quirks = MT_QUIRK_ALWAYS_VALID |
321 MT_QUIRK_IGNORE_DUPLICATES |
322 MT_QUIRK_HOVERING |
323 MT_QUIRK_CONTACT_CNT_ACCURATE |
324 MT_QUIRK_STICKY_FINGERS |
325 MT_QUIRK_WIN8_PTP_BUTTONS |
326 MT_QUIRK_DISABLE_WAKEUP,
327 .export_all_inputs = true },
328 { .name = MT_CLS_WIN_8_NO_STICKY_FINGERS,
329 .quirks = MT_QUIRK_ALWAYS_VALID |
330 MT_QUIRK_IGNORE_DUPLICATES |
331 MT_QUIRK_HOVERING |
332 MT_QUIRK_CONTACT_CNT_ACCURATE |
333 MT_QUIRK_WIN8_PTP_BUTTONS,
334 .export_all_inputs = true },
335
336 /*
337 * vendor specific classes
338 */
339 { .name = MT_CLS_3M,
340 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
341 MT_QUIRK_SLOT_IS_CONTACTID |
342 MT_QUIRK_TOUCH_SIZE_SCALING,
343 .sn_move = 2048,
344 .sn_width = 128,
345 .sn_height = 128,
346 .maxcontacts = 60,
347 },
348 { .name = MT_CLS_EGALAX,
349 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
350 MT_QUIRK_VALID_IS_INRANGE,
351 .sn_move = 4096,
352 .sn_pressure = 32,
353 },
354 { .name = MT_CLS_EGALAX_SERIAL,
355 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
356 MT_QUIRK_ALWAYS_VALID,
357 .sn_move = 4096,
358 .sn_pressure = 32,
359 },
360 { .name = MT_CLS_TOPSEED,
361 .quirks = MT_QUIRK_ALWAYS_VALID,
362 .is_indirect = true,
363 .maxcontacts = 2,
364 },
365 { .name = MT_CLS_PANASONIC,
366 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
367 .maxcontacts = 4 },
368 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
369 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
370 MT_QUIRK_VALID_IS_INRANGE |
371 MT_QUIRK_SLOT_IS_CONTACTID,
372 .maxcontacts = 2
373 },
374 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
375 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
376 MT_QUIRK_SLOT_IS_CONTACTID
377 },
378
379 { .name = MT_CLS_FLATFROG,
380 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
381 MT_QUIRK_NO_AREA,
382 .sn_move = 2048,
383 .maxcontacts = 40,
384 },
385 { .name = MT_CLS_LG,
386 .quirks = MT_QUIRK_ALWAYS_VALID |
387 MT_QUIRK_FIX_CONST_CONTACT_ID |
388 MT_QUIRK_IGNORE_DUPLICATES |
389 MT_QUIRK_HOVERING |
390 MT_QUIRK_CONTACT_CNT_ACCURATE },
391 { .name = MT_CLS_ASUS,
392 .quirks = MT_QUIRK_ALWAYS_VALID |
393 MT_QUIRK_CONTACT_CNT_ACCURATE |
394 MT_QUIRK_ASUS_CUSTOM_UP },
395 { .name = MT_CLS_VTL,
396 .quirks = MT_QUIRK_ALWAYS_VALID |
397 MT_QUIRK_CONTACT_CNT_ACCURATE |
398 MT_QUIRK_STICKY_FINGERS |
399 MT_QUIRK_FORCE_GET_FEATURE,
400 },
401 { .name = MT_CLS_GOOGLE,
402 .quirks = MT_QUIRK_ALWAYS_VALID |
403 MT_QUIRK_CONTACT_CNT_ACCURATE |
404 MT_QUIRK_SLOT_IS_CONTACTID |
405 MT_QUIRK_HOVERING
406 },
407 { .name = MT_CLS_RAZER_BLADE_STEALTH,
408 .quirks = MT_QUIRK_ALWAYS_VALID |
409 MT_QUIRK_IGNORE_DUPLICATES |
410 MT_QUIRK_HOVERING |
411 MT_QUIRK_CONTACT_CNT_ACCURATE |
412 MT_QUIRK_WIN8_PTP_BUTTONS,
413 },
414 { .name = MT_CLS_SMART_TECH,
415 .quirks = MT_QUIRK_ALWAYS_VALID |
416 MT_QUIRK_IGNORE_DUPLICATES |
417 MT_QUIRK_CONTACT_CNT_ACCURATE |
418 MT_QUIRK_SEPARATE_APP_REPORT,
419 },
420 { .name = MT_CLS_APPLE_TOUCHBAR,
421 .quirks = MT_QUIRK_HOVERING |
422 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE |
423 MT_QUIRK_APPLE_TOUCHBAR,
424 .maxcontacts = 11,
425 },
426 { .name = MT_CLS_SIS,
427 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
428 MT_QUIRK_ALWAYS_VALID |
429 MT_QUIRK_CONTACT_CNT_ACCURATE,
430 },
431 { }
432 };
433
mt_show_quirks(struct device * dev,struct device_attribute * attr,char * buf)434 static ssize_t mt_show_quirks(struct device *dev,
435 struct device_attribute *attr,
436 char *buf)
437 {
438 struct hid_device *hdev = to_hid_device(dev);
439 struct mt_device *td = hid_get_drvdata(hdev);
440
441 return sprintf(buf, "%u\n", td->mtclass.quirks);
442 }
443
mt_set_quirks(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)444 static ssize_t mt_set_quirks(struct device *dev,
445 struct device_attribute *attr,
446 const char *buf, size_t count)
447 {
448 struct hid_device *hdev = to_hid_device(dev);
449 struct mt_device *td = hid_get_drvdata(hdev);
450 struct mt_application *application;
451
452 unsigned long val;
453
454 if (kstrtoul(buf, 0, &val))
455 return -EINVAL;
456
457 td->mtclass.quirks = val;
458
459 list_for_each_entry(application, &td->applications, list) {
460 application->quirks = val;
461 if (!application->have_contact_count)
462 application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
463 }
464
465 return count;
466 }
467
468 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
469
470 static struct attribute *sysfs_attrs[] = {
471 &dev_attr_quirks.attr,
472 NULL
473 };
474
475 static const struct attribute_group mt_attribute_group = {
476 .attrs = sysfs_attrs
477 };
478
mt_get_feature(struct hid_device * hdev,struct hid_report * report)479 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
480 {
481 int ret;
482 u32 size = hid_report_len(report);
483 u8 *buf;
484
485 /*
486 * Do not fetch the feature report if the device has been explicitly
487 * marked as non-capable.
488 */
489 if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
490 return;
491
492 buf = hid_alloc_report_buf(report, GFP_KERNEL);
493 if (!buf)
494 return;
495
496 ret = hid_hw_raw_request(hdev, report->id, buf, size,
497 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
498 if (ret < 0) {
499 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
500 report->id);
501 } else {
502 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
503 size, 0);
504 if (ret)
505 dev_warn(&hdev->dev, "failed to report feature\n");
506 }
507
508 kfree(buf);
509 }
510
mt_feature_mapping(struct hid_device * hdev,struct hid_field * field,struct hid_usage * usage)511 static void mt_feature_mapping(struct hid_device *hdev,
512 struct hid_field *field, struct hid_usage *usage)
513 {
514 struct mt_device *td = hid_get_drvdata(hdev);
515
516 switch (usage->hid) {
517 case HID_DG_CONTACTMAX:
518 mt_get_feature(hdev, field->report);
519
520 td->maxcontacts = field->value[0];
521 if (!td->maxcontacts &&
522 field->logical_maximum <= MT_MAX_MAXCONTACT)
523 td->maxcontacts = field->logical_maximum;
524 if (td->mtclass.maxcontacts)
525 /* check if the maxcontacts is given by the class */
526 td->maxcontacts = td->mtclass.maxcontacts;
527
528 break;
529 case HID_DG_BUTTONTYPE:
530 if (usage->usage_index >= field->report_count) {
531 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
532 break;
533 }
534
535 mt_get_feature(hdev, field->report);
536 switch (field->value[usage->usage_index]) {
537 case MT_BUTTONTYPE_CLICKPAD:
538 td->is_buttonpad = true;
539 break;
540 case MT_BUTTONTYPE_PRESSUREPAD:
541 td->is_pressurepad = true;
542 break;
543 }
544
545 break;
546 case 0xff0000c5:
547 /* Retrieve the Win8 blob once to enable some devices */
548 if (usage->usage_index == 0)
549 mt_get_feature(hdev, field->report);
550 break;
551 }
552
553 hid_haptic_feature_mapping(hdev, td->haptic, field, usage);
554 }
555
set_abs(struct input_dev * input,unsigned int code,struct hid_field * field,int snratio)556 static void set_abs(struct input_dev *input, unsigned int code,
557 struct hid_field *field, int snratio)
558 {
559 int fmin = field->logical_minimum;
560 int fmax = field->logical_maximum;
561 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
562 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
563 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
564 }
565
mt_allocate_usage(struct hid_device * hdev,struct mt_application * application)566 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
567 struct mt_application *application)
568 {
569 struct mt_usages *usage;
570
571 usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
572 if (!usage)
573 return NULL;
574
575 /* set some defaults so we do not need to check for null pointers */
576 usage->x = DEFAULT_ZERO;
577 usage->y = DEFAULT_ZERO;
578 usage->cx = DEFAULT_ZERO;
579 usage->cy = DEFAULT_ZERO;
580 usage->p = DEFAULT_ZERO;
581 usage->w = DEFAULT_ZERO;
582 usage->h = DEFAULT_ZERO;
583 usage->a = DEFAULT_ZERO;
584 usage->contactid = DEFAULT_ZERO;
585 usage->tip_state = DEFAULT_FALSE;
586 usage->inrange_state = DEFAULT_FALSE;
587 usage->confidence_state = DEFAULT_TRUE;
588
589 list_add_tail(&usage->list, &application->mt_usages);
590
591 return usage;
592 }
593
mt_allocate_application(struct mt_device * td,struct hid_report * report)594 static struct mt_application *mt_allocate_application(struct mt_device *td,
595 struct hid_report *report)
596 {
597 unsigned int application = report->application;
598 struct mt_application *mt_application;
599
600 mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
601 GFP_KERNEL);
602 if (!mt_application)
603 return NULL;
604
605 mt_application->application = application;
606 INIT_LIST_HEAD(&mt_application->mt_usages);
607
608 if (application == HID_DG_TOUCHSCREEN)
609 mt_application->mt_flags |= INPUT_MT_DIRECT;
610
611 /*
612 * Model touchscreens providing buttons as touchpads.
613 */
614 if (application == HID_DG_TOUCHPAD) {
615 mt_application->mt_flags |= INPUT_MT_POINTER;
616 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
617 }
618
619 mt_application->scantime = DEFAULT_ZERO;
620 mt_application->raw_cc = DEFAULT_ZERO;
621 mt_application->quirks = td->mtclass.quirks;
622 mt_application->report_id = report->id;
623
624 list_add_tail(&mt_application->list, &td->applications);
625
626 return mt_application;
627 }
628
mt_find_application(struct mt_device * td,struct hid_report * report)629 static struct mt_application *mt_find_application(struct mt_device *td,
630 struct hid_report *report)
631 {
632 unsigned int application = report->application;
633 struct mt_application *tmp, *mt_application = NULL;
634
635 list_for_each_entry(tmp, &td->applications, list) {
636 if (application == tmp->application) {
637 if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
638 tmp->report_id == report->id) {
639 mt_application = tmp;
640 break;
641 }
642 }
643 }
644
645 if (!mt_application)
646 mt_application = mt_allocate_application(td, report);
647
648 return mt_application;
649 }
650
mt_allocate_report_data(struct mt_device * td,struct hid_report * report)651 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
652 struct hid_report *report)
653 {
654 struct mt_class *cls = &td->mtclass;
655 struct mt_report_data *rdata;
656 struct hid_field *field;
657 int r, n;
658
659 rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
660 if (!rdata)
661 return NULL;
662
663 rdata->report = report;
664 rdata->application = mt_find_application(td, report);
665
666 if (!rdata->application) {
667 devm_kfree(&td->hdev->dev, rdata);
668 return NULL;
669 }
670
671 for (r = 0; r < report->maxfield; r++) {
672 field = report->field[r];
673
674 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
675 continue;
676
677 if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) {
678 for (n = 0; n < field->report_count; n++) {
679 unsigned int hid = field->usage[n].hid;
680
681 if (hid == HID_DG_CONTACTID ||
682 (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR &&
683 hid == HID_DG_TRANSDUCER_INDEX)) {
684 rdata->is_mt_collection = true;
685 break;
686 }
687 }
688 }
689 }
690
691 list_add_tail(&rdata->list, &td->reports);
692
693 return rdata;
694 }
695
mt_find_report_data(struct mt_device * td,struct hid_report * report)696 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
697 struct hid_report *report)
698 {
699 struct mt_report_data *tmp, *rdata = NULL;
700
701 list_for_each_entry(tmp, &td->reports, list) {
702 if (report == tmp->report) {
703 rdata = tmp;
704 break;
705 }
706 }
707
708 if (!rdata)
709 rdata = mt_allocate_report_data(td, report);
710
711 return rdata;
712 }
713
mt_store_field(struct hid_device * hdev,struct mt_application * application,__s32 * value,size_t offset)714 static void mt_store_field(struct hid_device *hdev,
715 struct mt_application *application,
716 __s32 *value,
717 size_t offset)
718 {
719 struct mt_usages *usage;
720 __s32 **target;
721
722 if (list_empty(&application->mt_usages))
723 usage = mt_allocate_usage(hdev, application);
724 else
725 usage = list_last_entry(&application->mt_usages,
726 struct mt_usages,
727 list);
728
729 if (!usage)
730 return;
731
732 target = (__s32 **)((char *)usage + offset);
733
734 /* the value has already been filled, create a new slot */
735 if (*target != DEFAULT_TRUE &&
736 *target != DEFAULT_FALSE &&
737 *target != DEFAULT_ZERO) {
738 if (usage->contactid == DEFAULT_ZERO ||
739 usage->x == DEFAULT_ZERO ||
740 usage->y == DEFAULT_ZERO) {
741 hid_dbg(hdev,
742 "ignoring duplicate usage on incomplete");
743 return;
744 }
745 usage = mt_allocate_usage(hdev, application);
746 if (!usage)
747 return;
748
749 target = (__s32 **)((char *)usage + offset);
750 }
751
752 *target = value;
753 }
754
755 #define MT_STORE_FIELD(__name) \
756 mt_store_field(hdev, app, \
757 &field->value[usage->usage_index], \
758 offsetof(struct mt_usages, __name))
759
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)760 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
761 struct hid_field *field, struct hid_usage *usage,
762 unsigned long **bit, int *max, struct mt_application *app)
763 {
764 struct mt_device *td = hid_get_drvdata(hdev);
765 struct mt_class *cls = &td->mtclass;
766 int code;
767 struct hid_usage *prev_usage = NULL;
768
769 /*
770 * Model touchscreens providing buttons as touchpads.
771 */
772 if (field->application == HID_DG_TOUCHSCREEN &&
773 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
774 app->mt_flags |= INPUT_MT_POINTER;
775 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
776 }
777
778 /* count the buttons on touchpads */
779 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
780 app->buttons_count++;
781
782 if (usage->usage_index)
783 prev_usage = &field->usage[usage->usage_index - 1];
784
785 switch (usage->hid & HID_USAGE_PAGE) {
786
787 case HID_UP_GENDESK:
788 switch (usage->hid) {
789 case HID_GD_X:
790 if (prev_usage && (prev_usage->hid == usage->hid)) {
791 code = ABS_MT_TOOL_X;
792 MT_STORE_FIELD(cx);
793 } else {
794 code = ABS_MT_POSITION_X;
795 MT_STORE_FIELD(x);
796 }
797
798 set_abs(hi->input, code, field, cls->sn_move);
799
800 /*
801 * A system multi-axis that exports X and Y has a high
802 * chance of being used directly on a surface
803 */
804 if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
805 __set_bit(INPUT_PROP_DIRECT,
806 hi->input->propbit);
807 input_set_abs_params(hi->input,
808 ABS_MT_TOOL_TYPE,
809 MT_TOOL_DIAL,
810 MT_TOOL_DIAL, 0, 0);
811 }
812
813 return 1;
814 case HID_GD_Y:
815 if (prev_usage && (prev_usage->hid == usage->hid)) {
816 code = ABS_MT_TOOL_Y;
817 MT_STORE_FIELD(cy);
818 } else {
819 code = ABS_MT_POSITION_Y;
820 MT_STORE_FIELD(y);
821 }
822
823 set_abs(hi->input, code, field, cls->sn_move);
824
825 return 1;
826 }
827 return 0;
828
829 case HID_UP_DIGITIZER:
830 switch (usage->hid) {
831 case HID_DG_INRANGE:
832 if (app->quirks & MT_QUIRK_HOVERING) {
833 input_set_abs_params(hi->input,
834 ABS_MT_DISTANCE, 0, 1, 0, 0);
835 }
836 MT_STORE_FIELD(inrange_state);
837 return 1;
838 case HID_DG_CONFIDENCE:
839 if ((cls->name == MT_CLS_WIN_8 ||
840 cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT ||
841 cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU ||
842 cls->name == MT_CLS_WIN_8_DISABLE_WAKEUP) &&
843 (field->application == HID_DG_TOUCHPAD ||
844 field->application == HID_DG_TOUCHSCREEN))
845 app->quirks |= MT_QUIRK_CONFIDENCE;
846
847 if (app->quirks & MT_QUIRK_CONFIDENCE)
848 input_set_abs_params(hi->input,
849 ABS_MT_TOOL_TYPE,
850 MT_TOOL_FINGER,
851 MT_TOOL_PALM, 0, 0);
852
853 MT_STORE_FIELD(confidence_state);
854 return 1;
855 case HID_DG_TOUCH:
856 /*
857 * Legacy devices use TIPSWITCH and not TOUCH.
858 * One special case here is of the Apple Touch Bars.
859 * In these devices, the tip state is contained in
860 * fields with the HID_DG_TOUCH usage.
861 * Let's just ignore this field for other devices.
862 */
863 if (!(cls->quirks & MT_QUIRK_APPLE_TOUCHBAR))
864 return -1;
865 fallthrough;
866 case HID_DG_TIPSWITCH:
867 if (field->application != HID_GD_SYSTEM_MULTIAXIS)
868 input_set_capability(hi->input,
869 EV_KEY, BTN_TOUCH);
870 MT_STORE_FIELD(tip_state);
871 return 1;
872 case HID_DG_TRANSDUCER_INDEX:
873 /*
874 * Contact ID in case of Apple Touch Bars is contained
875 * in fields with HID_DG_TRANSDUCER_INDEX usage.
876 */
877 if (!(cls->quirks & MT_QUIRK_APPLE_TOUCHBAR))
878 return 0;
879 fallthrough;
880 case HID_DG_CONTACTID:
881 MT_STORE_FIELD(contactid);
882 app->touches_by_report++;
883 return 1;
884 case HID_DG_WIDTH:
885 if (!(app->quirks & MT_QUIRK_NO_AREA))
886 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
887 cls->sn_width);
888 MT_STORE_FIELD(w);
889 return 1;
890 case HID_DG_HEIGHT:
891 if (!(app->quirks & MT_QUIRK_NO_AREA)) {
892 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
893 cls->sn_height);
894
895 /*
896 * Only set ABS_MT_ORIENTATION if it is not
897 * already set by the HID_DG_AZIMUTH usage.
898 */
899 if (!test_bit(ABS_MT_ORIENTATION,
900 hi->input->absbit))
901 input_set_abs_params(hi->input,
902 ABS_MT_ORIENTATION, 0, 1, 0, 0);
903 }
904 MT_STORE_FIELD(h);
905 return 1;
906 case HID_DG_TIPPRESSURE:
907 set_abs(hi->input, ABS_MT_PRESSURE, field,
908 cls->sn_pressure);
909 td->is_haptic_touchpad =
910 hid_haptic_check_pressure_unit(td->haptic,
911 hi, field);
912 MT_STORE_FIELD(p);
913 return 1;
914 case HID_DG_SCANTIME:
915 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
916 app->scantime = &field->value[usage->usage_index];
917 app->scantime_logical_max = field->logical_maximum;
918 return 1;
919 case HID_DG_CONTACTCOUNT:
920 app->have_contact_count = true;
921 app->raw_cc = &field->value[usage->usage_index];
922 return 1;
923 case HID_DG_AZIMUTH:
924 /*
925 * Azimuth has the range of [0, MAX) representing a full
926 * revolution. Set ABS_MT_ORIENTATION to a quarter of
927 * MAX according the definition of ABS_MT_ORIENTATION
928 */
929 input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
930 -field->logical_maximum / 4,
931 field->logical_maximum / 4,
932 cls->sn_move ?
933 field->logical_maximum / cls->sn_move : 0, 0);
934 MT_STORE_FIELD(a);
935 return 1;
936 case HID_DG_CONTACTMAX:
937 /* contact max are global to the report */
938 return -1;
939 }
940 /* let hid-input decide for the others */
941 return 0;
942
943 case HID_UP_BUTTON:
944 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
945 /*
946 * MS PTP spec says that external buttons left and right have
947 * usages 2 and 3.
948 */
949 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
950 field->application == HID_DG_TOUCHPAD &&
951 (usage->hid & HID_USAGE) > 1)
952 code--;
953
954 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
955 code = BTN_0 + ((usage->hid - 1) & HID_USAGE);
956
957 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
958 if (!*bit)
959 return -1;
960 input_set_capability(hi->input, EV_KEY, code);
961 return 1;
962
963 case 0xff000000:
964 /* we do not want to map these: no input-oriented meaning */
965 return -1;
966 }
967
968 return 0;
969 }
970
mt_compute_slot(struct mt_device * td,struct mt_application * app,struct mt_usages * slot,struct input_dev * input)971 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
972 struct mt_usages *slot,
973 struct input_dev *input)
974 {
975 __s32 quirks = app->quirks;
976
977 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
978 return *slot->contactid;
979
980 if (quirks & MT_QUIRK_CYPRESS)
981 return cypress_compute_slot(app, slot);
982
983 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
984 return app->num_received;
985
986 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
987 return *slot->contactid - 1;
988
989 return input_mt_get_slot_by_key(input, *slot->contactid);
990 }
991
mt_release_pending_palms(struct mt_device * td,struct mt_application * app,struct input_dev * input)992 static void mt_release_pending_palms(struct mt_device *td,
993 struct mt_application *app,
994 struct input_dev *input)
995 {
996 int slotnum;
997 bool need_sync = false;
998
999 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
1000 clear_bit(slotnum, app->pending_palm_slots);
1001 clear_bit(slotnum, &td->mt_io_flags);
1002
1003 input_mt_slot(input, slotnum);
1004 input_mt_report_slot_inactive(input);
1005
1006 need_sync = true;
1007 }
1008
1009 if (need_sync) {
1010 input_mt_sync_frame(input);
1011 input_sync(input);
1012 }
1013 }
1014
1015 /*
1016 * this function is called when a whole packet has been received and processed,
1017 * so that it can decide what to send to the input layer.
1018 */
mt_sync_frame(struct mt_device * td,struct mt_application * app,struct input_dev * input)1019 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
1020 struct input_dev *input)
1021 {
1022 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
1023 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
1024
1025 input_mt_sync_frame(input);
1026 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
1027 input_sync(input);
1028
1029 mt_release_pending_palms(td, app, input);
1030
1031 app->num_received = 0;
1032 app->left_button_state = 0;
1033 if (td->is_haptic_touchpad)
1034 hid_haptic_pressure_reset(td->haptic);
1035 }
1036
mt_compute_timestamp(struct mt_application * app,__s32 value)1037 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
1038 {
1039 long delta = value - app->prev_scantime;
1040 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
1041
1042 app->jiffies = jiffies;
1043
1044 if (delta < 0)
1045 delta += app->scantime_logical_max;
1046
1047 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
1048 delta *= 100;
1049
1050 if (jdelta > MAX_TIMESTAMP_INTERVAL)
1051 /* No data received for a while, resync the timestamp. */
1052 return 0;
1053 else
1054 return app->timestamp + delta;
1055 }
1056
mt_touch_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1057 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
1058 struct hid_usage *usage, __s32 value)
1059 {
1060 /* we will handle the hidinput part later, now remains hiddev */
1061 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
1062 hid->hiddev_hid_event(hid, field, usage, value);
1063
1064 return 1;
1065 }
1066
mt_process_slot(struct mt_device * td,struct input_dev * input,struct mt_application * app,struct mt_usages * slot)1067 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
1068 struct mt_application *app,
1069 struct mt_usages *slot)
1070 {
1071 struct input_mt *mt = input->mt;
1072 struct hid_device *hdev = td->hdev;
1073 __s32 quirks = app->quirks;
1074 bool valid = true;
1075 bool confidence_state = true;
1076 bool inrange_state = false;
1077 int active;
1078 int slotnum;
1079 int tool = MT_TOOL_FINGER;
1080
1081 if (!slot)
1082 return -EINVAL;
1083
1084 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
1085 app->num_received >= app->num_expected)
1086 return -EAGAIN;
1087
1088 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
1089 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
1090 valid = *slot->inrange_state;
1091 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1092 valid = *slot->tip_state;
1093 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
1094 valid = *slot->confidence_state;
1095
1096 if (!valid)
1097 return 0;
1098 }
1099
1100 slotnum = mt_compute_slot(td, app, slot, input);
1101 if (slotnum < 0 || slotnum >= td->maxcontacts)
1102 return 0;
1103
1104 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1105 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1106
1107 if (input_mt_is_active(i_slot) &&
1108 input_mt_is_used(mt, i_slot))
1109 return -EAGAIN;
1110 }
1111
1112 if (quirks & MT_QUIRK_CONFIDENCE)
1113 confidence_state = *slot->confidence_state;
1114
1115 if (quirks & MT_QUIRK_HOVERING)
1116 inrange_state = *slot->inrange_state;
1117
1118 active = *slot->tip_state || inrange_state;
1119
1120 if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1121 tool = MT_TOOL_DIAL;
1122 else if (unlikely(!confidence_state)) {
1123 tool = MT_TOOL_PALM;
1124 if (!active && mt &&
1125 input_mt_is_active(&mt->slots[slotnum])) {
1126 /*
1127 * The non-confidence was reported for
1128 * previously valid contact that is also no
1129 * longer valid. We can't simply report
1130 * lift-off as userspace will not be aware
1131 * of non-confidence, so we need to split
1132 * it into 2 events: active MT_TOOL_PALM
1133 * and a separate liftoff.
1134 */
1135 active = true;
1136 set_bit(slotnum, app->pending_palm_slots);
1137 }
1138 }
1139
1140 input_mt_slot(input, slotnum);
1141 input_mt_report_slot_state(input, tool, active);
1142 if (active) {
1143 /* this finger is in proximity of the sensor */
1144 int wide = (*slot->w > *slot->h);
1145 int major = max(*slot->w, *slot->h);
1146 int minor = min(*slot->w, *slot->h);
1147 int orientation = wide;
1148 int max_azimuth;
1149 int azimuth;
1150 int x;
1151 int y;
1152 int cx;
1153 int cy;
1154
1155 if (slot->a != DEFAULT_ZERO) {
1156 /*
1157 * Azimuth is counter-clockwise and ranges from [0, MAX)
1158 * (a full revolution). Convert it to clockwise ranging
1159 * [-MAX/2, MAX/2].
1160 *
1161 * Note that ABS_MT_ORIENTATION require us to report
1162 * the limit of [-MAX/4, MAX/4], but the value can go
1163 * out of range to [-MAX/2, MAX/2] to report an upside
1164 * down ellipsis.
1165 */
1166 azimuth = *slot->a;
1167 max_azimuth = input_abs_get_max(input,
1168 ABS_MT_ORIENTATION);
1169 if (azimuth > max_azimuth * 2)
1170 azimuth -= max_azimuth * 4;
1171 orientation = -azimuth;
1172 if (quirks & MT_QUIRK_ORIENTATION_INVERT)
1173 orientation = -orientation;
1174
1175 }
1176
1177 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1178 /*
1179 * divided by two to match visual scale of touch
1180 * for devices with this quirk
1181 */
1182 major = major >> 1;
1183 minor = minor >> 1;
1184 }
1185
1186 if (td->is_haptic_touchpad)
1187 hid_haptic_pressure_increase(td->haptic, *slot->p);
1188
1189 x = hdev->quirks & HID_QUIRK_X_INVERT ?
1190 input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->x :
1191 *slot->x;
1192 y = hdev->quirks & HID_QUIRK_Y_INVERT ?
1193 input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->y :
1194 *slot->y;
1195 cx = hdev->quirks & HID_QUIRK_X_INVERT ?
1196 input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->cx :
1197 *slot->cx;
1198 cy = hdev->quirks & HID_QUIRK_Y_INVERT ?
1199 input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->cy :
1200 *slot->cy;
1201
1202 input_event(input, EV_ABS, ABS_MT_POSITION_X, x);
1203 input_event(input, EV_ABS, ABS_MT_POSITION_Y, y);
1204 input_event(input, EV_ABS, ABS_MT_TOOL_X, cx);
1205 input_event(input, EV_ABS, ABS_MT_TOOL_Y, cy);
1206 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1207 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1208 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1209 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1210 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1211
1212 set_bit(slotnum, &td->mt_io_flags);
1213 } else {
1214 clear_bit(slotnum, &td->mt_io_flags);
1215 }
1216
1217 return 0;
1218 }
1219
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)1220 static void mt_process_mt_event(struct hid_device *hid,
1221 struct mt_application *app,
1222 struct hid_field *field,
1223 struct hid_usage *usage,
1224 __s32 value,
1225 bool first_packet)
1226 {
1227 __s32 quirks = app->quirks;
1228 struct input_dev *input = field->hidinput->input;
1229
1230 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1231 return;
1232
1233 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1234
1235 /*
1236 * For Win8 PTP touchpads we should only look at
1237 * non finger/touch events in the first_packet of a
1238 * (possible) multi-packet frame.
1239 */
1240 if (!first_packet)
1241 return;
1242
1243 /*
1244 * For Win8 PTP touchpads we map both the clickpad click
1245 * and any "external" left buttons to BTN_LEFT if a
1246 * device claims to have both we need to report 1 for
1247 * BTN_LEFT if either is pressed, so we or all values
1248 * together and report the result in mt_sync_frame().
1249 */
1250 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1251 app->left_button_state |= value;
1252 return;
1253 }
1254 }
1255
1256 input_event(input, usage->type, usage->code, value);
1257 }
1258
mt_touch_report(struct hid_device * hid,struct mt_report_data * rdata)1259 static void mt_touch_report(struct hid_device *hid,
1260 struct mt_report_data *rdata)
1261 {
1262 struct mt_device *td = hid_get_drvdata(hid);
1263 struct hid_report *report = rdata->report;
1264 struct mt_application *app = rdata->application;
1265 struct hid_field *field;
1266 struct input_dev *input;
1267 struct mt_usages *slot;
1268 bool first_packet;
1269 unsigned count;
1270 int r, n;
1271 int scantime = 0;
1272 int contact_count = -1;
1273
1274 /* sticky fingers release in progress, abort */
1275 if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1276 return;
1277
1278 scantime = *app->scantime;
1279 app->timestamp = mt_compute_timestamp(app, scantime);
1280 if (app->raw_cc != DEFAULT_ZERO)
1281 contact_count = *app->raw_cc;
1282
1283 /*
1284 * Includes multi-packet support where subsequent
1285 * packets are sent with zero contactcount.
1286 */
1287 if (contact_count >= 0) {
1288 /*
1289 * For Win8 PTPs the first packet (td->num_received == 0) may
1290 * have a contactcount of 0 if there only is a button event.
1291 * We double check that this is not a continuation packet
1292 * of a possible multi-packet frame be checking that the
1293 * timestamp has changed.
1294 */
1295 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1296 app->num_received == 0 &&
1297 app->prev_scantime != scantime)
1298 app->num_expected = contact_count;
1299 /* A non 0 contact count always indicates a first packet */
1300 else if (contact_count)
1301 app->num_expected = contact_count;
1302 }
1303 app->prev_scantime = scantime;
1304
1305 first_packet = app->num_received == 0;
1306
1307 input = report->field[0]->hidinput->input;
1308
1309 list_for_each_entry(slot, &app->mt_usages, list) {
1310 if (!mt_process_slot(td, input, app, slot))
1311 app->num_received++;
1312 }
1313
1314 for (r = 0; r < report->maxfield; r++) {
1315 field = report->field[r];
1316 count = field->report_count;
1317
1318 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1319 continue;
1320
1321 for (n = 0; n < count; n++)
1322 mt_process_mt_event(hid, app, field,
1323 &field->usage[n], field->value[n],
1324 first_packet);
1325 }
1326
1327 if (app->num_received >= app->num_expected)
1328 mt_sync_frame(td, app, input);
1329
1330 /*
1331 * Windows 8 specs says 2 things:
1332 * - once a contact has been reported, it has to be reported in each
1333 * subsequent report
1334 * - the report rate when fingers are present has to be at least
1335 * the refresh rate of the screen, 60 or 120 Hz
1336 *
1337 * I interprete this that the specification forces a report rate of
1338 * at least 60 Hz for a touchscreen to be certified.
1339 * Which means that if we do not get a report whithin 16 ms, either
1340 * something wrong happens, either the touchscreen forgets to send
1341 * a release. Taking a reasonable margin allows to remove issues
1342 * with USB communication or the load of the machine.
1343 *
1344 * Given that Win 8 devices are forced to send a release, this will
1345 * only affect laggish machines and the ones that have a firmware
1346 * defect.
1347 */
1348 if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1349 if (td->mt_io_flags & MT_IO_SLOTS_MASK)
1350 mod_timer(&td->release_timer,
1351 jiffies + msecs_to_jiffies(100));
1352 else
1353 timer_delete(&td->release_timer);
1354 }
1355
1356 clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1357 }
1358
mt_touch_input_configured(struct hid_device * hdev,struct hid_input * hi,struct mt_application * app)1359 static int mt_touch_input_configured(struct hid_device *hdev,
1360 struct hid_input *hi,
1361 struct mt_application *app)
1362 {
1363 struct mt_device *td = hid_get_drvdata(hdev);
1364 struct mt_class *cls = &td->mtclass;
1365 struct input_dev *input = hi->input;
1366 int ret;
1367
1368 /*
1369 * HID_DG_CONTACTMAX field is not present on Apple Touch Bars,
1370 * but the maximum contact count is greater than the default.
1371 */
1372 if (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR && cls->maxcontacts)
1373 td->maxcontacts = cls->maxcontacts;
1374
1375 if (!td->maxcontacts)
1376 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1377
1378 mt_post_parse(td, app);
1379 if (td->serial_maybe)
1380 mt_post_parse_default_settings(td, app);
1381
1382 /*
1383 * The application for Apple Touch Bars is HID_DG_TOUCHPAD,
1384 * but these devices are direct.
1385 */
1386 if (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR)
1387 app->mt_flags |= INPUT_MT_DIRECT;
1388
1389 if (cls->is_indirect)
1390 app->mt_flags |= INPUT_MT_POINTER;
1391
1392 if (td->is_haptic_touchpad)
1393 app->mt_flags |= INPUT_MT_TOTAL_FORCE;
1394
1395 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1396 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1397
1398 /* check for clickpads */
1399 if ((app->mt_flags & INPUT_MT_POINTER) &&
1400 (app->buttons_count == 1))
1401 td->is_buttonpad = true;
1402
1403 if (td->is_buttonpad)
1404 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1405 if (td->is_pressurepad)
1406 __set_bit(INPUT_PROP_PRESSUREPAD, input->propbit);
1407
1408 app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1409 BITS_TO_LONGS(td->maxcontacts),
1410 sizeof(long),
1411 GFP_KERNEL);
1412 if (!app->pending_palm_slots)
1413 return -ENOMEM;
1414
1415 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1416 if (ret)
1417 return ret;
1418
1419 app->mt_flags = 0;
1420 return 0;
1421 }
1422
1423 #define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1424 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)1425 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1426 struct hid_field *field, struct hid_usage *usage,
1427 unsigned long **bit, int *max)
1428 {
1429 struct mt_device *td = hid_get_drvdata(hdev);
1430 struct mt_application *application;
1431 struct mt_report_data *rdata;
1432 int ret;
1433
1434 rdata = mt_find_report_data(td, field->report);
1435 if (!rdata) {
1436 hid_err(hdev, "failed to allocate data for report\n");
1437 return 0;
1438 }
1439
1440 application = rdata->application;
1441
1442 /*
1443 * If mtclass.export_all_inputs is not set, only map fields from
1444 * TouchScreen or TouchPad collections. We need to ignore fields
1445 * that belong to other collections such as Mouse that might have
1446 * the same GenericDesktop usages.
1447 */
1448 if (!td->mtclass.export_all_inputs &&
1449 field->application != HID_DG_TOUCHSCREEN &&
1450 field->application != HID_DG_PEN &&
1451 field->application != HID_DG_TOUCHPAD &&
1452 field->application != HID_GD_KEYBOARD &&
1453 field->application != HID_GD_SYSTEM_CONTROL &&
1454 field->application != HID_CP_CONSUMER_CONTROL &&
1455 field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1456 field->application != HID_GD_SYSTEM_MULTIAXIS &&
1457 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1458 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1459 return -1;
1460
1461 /*
1462 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1463 * touchpad report descriptor. We need to treat these as an array to
1464 * map usages to input keys.
1465 */
1466 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1467 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1468 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1469 set_bit(EV_REP, hi->input->evbit);
1470 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1471 field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1472 switch (usage->hid & HID_USAGE) {
1473 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
1474 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
1475 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
1476 case 0x6b: mt_map_key_clear(KEY_F21); break;
1477 case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
1478 default:
1479 return -1;
1480 }
1481 return 1;
1482 }
1483
1484 if (rdata->is_mt_collection)
1485 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1486 application);
1487
1488 /*
1489 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1490 * for the stylus. Overwrite the hid_input application
1491 */
1492 if (field->physical == HID_DG_STYLUS)
1493 hi->application = HID_DG_STYLUS;
1494
1495 ret = hid_haptic_input_mapping(hdev, td->haptic, hi, field, usage, bit,
1496 max);
1497 if (ret != 0)
1498 return ret;
1499
1500 /* let hid-core decide for the others */
1501 return 0;
1502 }
1503
mt_input_mapped(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)1504 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1505 struct hid_field *field, struct hid_usage *usage,
1506 unsigned long **bit, int *max)
1507 {
1508 struct mt_device *td = hid_get_drvdata(hdev);
1509 struct mt_report_data *rdata;
1510
1511 rdata = mt_find_report_data(td, field->report);
1512 if (rdata && rdata->is_mt_collection) {
1513 /* We own these mappings, tell hid-input to ignore them */
1514 return -1;
1515 }
1516
1517 /* let hid-core decide for the others */
1518 return 0;
1519 }
1520
mt_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1521 static int mt_event(struct hid_device *hid, struct hid_field *field,
1522 struct hid_usage *usage, __s32 value)
1523 {
1524 struct mt_device *td = hid_get_drvdata(hid);
1525 struct mt_report_data *rdata;
1526
1527 rdata = mt_find_report_data(td, field->report);
1528 if (rdata && rdata->is_mt_collection)
1529 return mt_touch_event(hid, field, usage, value);
1530
1531 return 0;
1532 }
1533
mt_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * size)1534 static const __u8 *mt_report_fixup(struct hid_device *hdev, __u8 *rdesc,
1535 unsigned int *size)
1536 {
1537 if (hdev->vendor == I2C_VENDOR_ID_GOODIX &&
1538 (hdev->product == I2C_DEVICE_ID_GOODIX_01E8 ||
1539 hdev->product == I2C_DEVICE_ID_GOODIX_01E9)) {
1540 if (*size < 608) {
1541 dev_info(
1542 &hdev->dev,
1543 "GT7868Q fixup: report descriptor is only %u bytes, skipping\n",
1544 *size);
1545 return rdesc;
1546 }
1547
1548 if (rdesc[607] == 0x15) {
1549 rdesc[607] = 0x25;
1550 dev_info(
1551 &hdev->dev,
1552 "GT7868Q report descriptor fixup is applied.\n");
1553 } else {
1554 dev_info(
1555 &hdev->dev,
1556 "The byte is not expected for fixing the report descriptor. \
1557 It's possible that the touchpad firmware is not suitable for applying the fix. \
1558 got: %x\n",
1559 rdesc[607]);
1560 }
1561 }
1562
1563 return rdesc;
1564 }
1565
mt_report(struct hid_device * hid,struct hid_report * report)1566 static void mt_report(struct hid_device *hid, struct hid_report *report)
1567 {
1568 struct mt_device *td = hid_get_drvdata(hid);
1569 struct hid_field *field = report->field[0];
1570 struct mt_report_data *rdata;
1571
1572 if (!(hid->claimed & HID_CLAIMED_INPUT))
1573 return;
1574
1575 rdata = mt_find_report_data(td, report);
1576 if (rdata && rdata->is_mt_collection)
1577 return mt_touch_report(hid, rdata);
1578
1579 if (field && field->hidinput && field->hidinput->input)
1580 input_sync(field->hidinput->input);
1581 }
1582
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)1583 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1584 struct hid_field *field,
1585 struct hid_usage *usage,
1586 enum latency_mode latency,
1587 enum report_mode report_mode,
1588 bool *inputmode_found)
1589 {
1590 struct mt_device *td = hid_get_drvdata(hdev);
1591 struct mt_class *cls = &td->mtclass;
1592 struct hid_report *report = field->report;
1593 unsigned int index = usage->usage_index;
1594 char *buf;
1595 u32 report_len;
1596 int max;
1597
1598 switch (usage->hid) {
1599 case HID_DG_INPUTMODE:
1600 /*
1601 * Some elan panels wrongly declare 2 input mode features,
1602 * and silently ignore when we set the value in the second
1603 * field. Skip the second feature and hope for the best.
1604 */
1605 if (*inputmode_found)
1606 return false;
1607
1608 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1609 report_len = hid_report_len(report);
1610 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1611 if (!buf) {
1612 hid_err(hdev,
1613 "failed to allocate buffer for report\n");
1614 return false;
1615 }
1616 hid_hw_raw_request(hdev, report->id, buf, report_len,
1617 HID_FEATURE_REPORT,
1618 HID_REQ_GET_REPORT);
1619 kfree(buf);
1620 }
1621
1622 field->value[index] = td->inputmode_value;
1623 *inputmode_found = true;
1624 return true;
1625
1626 case HID_DG_CONTACTMAX:
1627 if (cls->maxcontacts) {
1628 max = min_t(int, field->logical_maximum,
1629 cls->maxcontacts);
1630 if (field->value[index] != max) {
1631 field->value[index] = max;
1632 return true;
1633 }
1634 }
1635 break;
1636
1637 case HID_DG_LATENCYMODE:
1638 field->value[index] = latency;
1639 return true;
1640
1641 case HID_DG_SURFACESWITCH:
1642 field->value[index] = !!(report_mode & TOUCHPAD_REPORT_CONTACTS);
1643 return true;
1644
1645 case HID_DG_BUTTONSWITCH:
1646 field->value[index] = !!(report_mode & TOUCHPAD_REPORT_BUTTONS);
1647 return true;
1648 }
1649
1650 return false; /* no need to update the report */
1651 }
1652
mt_set_modes(struct hid_device * hdev,enum latency_mode latency,enum report_mode report_mode)1653 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1654 enum report_mode report_mode)
1655 {
1656 struct hid_report_enum *rep_enum;
1657 struct hid_report *rep;
1658 struct hid_usage *usage;
1659 int i, j;
1660 bool update_report;
1661 bool inputmode_found = false;
1662
1663 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1664 list_for_each_entry(rep, &rep_enum->report_list, list) {
1665 update_report = false;
1666
1667 for (i = 0; i < rep->maxfield; i++) {
1668 /* Ignore if report count is out of bounds. */
1669 if (rep->field[i]->report_count < 1)
1670 continue;
1671
1672 for (j = 0; j < rep->field[i]->maxusage; j++) {
1673 usage = &rep->field[i]->usage[j];
1674
1675 if (mt_need_to_apply_feature(hdev,
1676 rep->field[i],
1677 usage,
1678 latency,
1679 report_mode,
1680 &inputmode_found))
1681 update_report = true;
1682 }
1683 }
1684
1685 if (update_report)
1686 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1687 }
1688 }
1689
mt_post_parse_default_settings(struct mt_device * td,struct mt_application * app)1690 static void mt_post_parse_default_settings(struct mt_device *td,
1691 struct mt_application *app)
1692 {
1693 __s32 quirks = app->quirks;
1694
1695 /* unknown serial device needs special quirks */
1696 if (list_is_singular(&app->mt_usages)) {
1697 quirks |= MT_QUIRK_ALWAYS_VALID;
1698 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1699 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1700 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1701 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1702 }
1703
1704 app->quirks = quirks;
1705 }
1706
mt_post_parse(struct mt_device * td,struct mt_application * app)1707 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1708 {
1709 if (!app->have_contact_count)
1710 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1711 }
1712
mt_input_configured(struct hid_device * hdev,struct hid_input * hi)1713 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1714 {
1715 struct mt_device *td = hid_get_drvdata(hdev);
1716 const char *suffix = NULL;
1717 struct mt_report_data *rdata;
1718 struct mt_application *mt_application = NULL;
1719 struct hid_report *report;
1720 int ret;
1721
1722 if (td->is_haptic_touchpad && (td->mtclass.name == MT_CLS_WIN_8 ||
1723 td->mtclass.name == MT_CLS_WIN_8_FORCE_MULTI_INPUT)) {
1724 if (hid_haptic_input_configured(hdev, td->haptic, hi) == 0)
1725 td->is_haptic_touchpad = false;
1726 } else {
1727 td->is_haptic_touchpad = false;
1728 }
1729
1730 list_for_each_entry(report, &hi->reports, hidinput_list) {
1731 rdata = mt_find_report_data(td, report);
1732 if (!rdata) {
1733 hid_err(hdev, "failed to allocate data for report\n");
1734 return -ENOMEM;
1735 }
1736
1737 mt_application = rdata->application;
1738
1739 if (rdata->is_mt_collection) {
1740 ret = mt_touch_input_configured(hdev, hi,
1741 mt_application);
1742 if (ret)
1743 return ret;
1744 }
1745 }
1746
1747 switch (hi->application) {
1748 case HID_GD_KEYBOARD:
1749 case HID_GD_KEYPAD:
1750 case HID_GD_MOUSE:
1751 case HID_DG_TOUCHPAD:
1752 case HID_GD_SYSTEM_CONTROL:
1753 case HID_CP_CONSUMER_CONTROL:
1754 case HID_GD_WIRELESS_RADIO_CTLS:
1755 case HID_GD_SYSTEM_MULTIAXIS:
1756 case HID_DG_PEN:
1757 /* already handled by hid core */
1758 break;
1759 case HID_DG_TOUCHSCREEN:
1760 /* we do not set suffix = "Touchscreen" */
1761 hi->input->name = hdev->name;
1762 break;
1763 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1764 suffix = "Custom Media Keys";
1765 break;
1766 case HID_DG_STYLUS:
1767 /* force BTN_STYLUS to allow tablet matching in udev */
1768 __set_bit(BTN_STYLUS, hi->input->keybit);
1769 break;
1770 default:
1771 suffix = "UNKNOWN";
1772 break;
1773 }
1774
1775 if (suffix) {
1776 hi->input->name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
1777 "%s %s", hdev->name, suffix);
1778 if (!hi->input->name)
1779 return -ENOMEM;
1780 }
1781
1782 return 0;
1783 }
1784
mt_fix_const_field(struct hid_field * field,unsigned int usage)1785 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1786 {
1787 if (field->usage[0].hid != usage ||
1788 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1789 return;
1790
1791 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1792 field->flags |= HID_MAIN_ITEM_VARIABLE;
1793 }
1794
mt_fix_const_fields(struct hid_device * hdev,unsigned int usage)1795 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1796 {
1797 struct hid_report *report;
1798 int i;
1799
1800 list_for_each_entry(report,
1801 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1802 list) {
1803
1804 if (!report->maxfield)
1805 continue;
1806
1807 for (i = 0; i < report->maxfield; i++)
1808 if (report->field[i]->maxusage >= 1)
1809 mt_fix_const_field(report->field[i], usage);
1810 }
1811 }
1812
mt_release_contacts(struct hid_device * hid)1813 static void mt_release_contacts(struct hid_device *hid)
1814 {
1815 struct hid_input *hidinput;
1816 struct mt_application *application;
1817 struct mt_device *td = hid_get_drvdata(hid);
1818
1819 list_for_each_entry(hidinput, &hid->inputs, list) {
1820 struct input_dev *input_dev = hidinput->input;
1821 struct input_mt *mt = input_dev->mt;
1822 int i;
1823
1824 if (mt) {
1825 for (i = 0; i < mt->num_slots; i++) {
1826 input_mt_slot(input_dev, i);
1827 input_mt_report_slot_inactive(input_dev);
1828 clear_bit(i, &td->mt_io_flags);
1829 }
1830 input_mt_sync_frame(input_dev);
1831 input_sync(input_dev);
1832 }
1833 }
1834
1835 list_for_each_entry(application, &td->applications, list) {
1836 application->num_received = 0;
1837 }
1838 }
1839
mt_expired_timeout(struct timer_list * t)1840 static void mt_expired_timeout(struct timer_list *t)
1841 {
1842 struct mt_device *td = timer_container_of(td, t, release_timer);
1843 struct hid_device *hdev = td->hdev;
1844
1845 /*
1846 * An input report came in just before we release the sticky fingers,
1847 * it will take care of the sticky fingers.
1848 */
1849 if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1850 return;
1851 if (td->mt_io_flags & MT_IO_SLOTS_MASK)
1852 mt_release_contacts(hdev);
1853 clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1854 }
1855
mt_probe(struct hid_device * hdev,const struct hid_device_id * id)1856 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1857 {
1858 int ret, i;
1859 struct mt_device *td;
1860 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1861
1862 for (i = 0; mt_classes[i].name ; i++) {
1863 if (id->driver_data == mt_classes[i].name) {
1864 mtclass = &(mt_classes[i]);
1865 break;
1866 }
1867 }
1868
1869 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1870 if (!td) {
1871 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1872 return -ENOMEM;
1873 }
1874 td->haptic = devm_kzalloc(&hdev->dev, sizeof(*(td->haptic)), GFP_KERNEL);
1875 if (!td->haptic)
1876 return -ENOMEM;
1877
1878 td->haptic->hdev = hdev;
1879 td->hdev = hdev;
1880 td->mtclass = *mtclass;
1881 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1882 hid_set_drvdata(hdev, td);
1883
1884 INIT_LIST_HEAD(&td->applications);
1885 INIT_LIST_HEAD(&td->reports);
1886
1887 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1888 td->serial_maybe = true;
1889
1890
1891 /* Orientation is inverted if the X or Y axes are
1892 * flipped, but normalized if both are inverted.
1893 */
1894 if (hdev->quirks & (HID_QUIRK_X_INVERT | HID_QUIRK_Y_INVERT) &&
1895 !((hdev->quirks & HID_QUIRK_X_INVERT)
1896 && (hdev->quirks & HID_QUIRK_Y_INVERT)))
1897 td->mtclass.quirks = MT_QUIRK_ORIENTATION_INVERT;
1898
1899 /* This allows the driver to correctly support devices
1900 * that emit events over several HID messages.
1901 */
1902 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1903
1904 /*
1905 * This allows the driver to handle different input sensors
1906 * that emits events through different applications on the same HID
1907 * device.
1908 */
1909 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1910
1911 if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1912 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1913
1914 if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) {
1915 hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP;
1916 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1917 }
1918
1919 timer_setup(&td->release_timer, mt_expired_timeout, 0);
1920
1921 ret = hid_parse(hdev);
1922 if (ret != 0)
1923 return ret;
1924
1925 if (mtclass->name == MT_CLS_APPLE_TOUCHBAR &&
1926 !hid_find_field(hdev, HID_INPUT_REPORT,
1927 HID_DG_TOUCHPAD, HID_DG_TRANSDUCER_INDEX))
1928 return -ENODEV;
1929
1930 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1931 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1932
1933 if (hdev->vendor == USB_VENDOR_ID_SIS_TOUCH)
1934 hdev->quirks |= HID_QUIRK_NOGET;
1935
1936 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1937 if (ret)
1938 return ret;
1939
1940 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1941 if (ret)
1942 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1943 hdev->name);
1944
1945 mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1946
1947 if (td->is_haptic_touchpad) {
1948 if (hid_haptic_init(hdev, &td->haptic)) {
1949 dev_warn(&hdev->dev, "Cannot allocate haptic for %s\n",
1950 hdev->name);
1951 td->is_haptic_touchpad = false;
1952 devm_kfree(&hdev->dev, td->haptic);
1953 }
1954 } else {
1955 devm_kfree(&hdev->dev, td->haptic);
1956 }
1957
1958 return 0;
1959 }
1960
mt_suspend(struct hid_device * hdev,pm_message_t state)1961 static int mt_suspend(struct hid_device *hdev, pm_message_t state)
1962 {
1963 struct mt_device *td = hid_get_drvdata(hdev);
1964
1965 /* High latency is desirable for power savings during S3/S0ix */
1966 if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) ||
1967 !hid_hw_may_wakeup(hdev))
1968 mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_NONE);
1969 else
1970 mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_ALL);
1971
1972 return 0;
1973 }
1974
mt_reset_resume(struct hid_device * hdev)1975 static int mt_reset_resume(struct hid_device *hdev)
1976 {
1977 mt_release_contacts(hdev);
1978 mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1979 return 0;
1980 }
1981
mt_resume(struct hid_device * hdev)1982 static int mt_resume(struct hid_device *hdev)
1983 {
1984 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1985 * It should be safe to send it to other devices too.
1986 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1987
1988 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1989
1990 mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1991
1992 return 0;
1993 }
1994
mt_remove(struct hid_device * hdev)1995 static void mt_remove(struct hid_device *hdev)
1996 {
1997 struct mt_device *td = hid_get_drvdata(hdev);
1998
1999 timer_delete_sync(&td->release_timer);
2000
2001 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
2002 hid_hw_stop(hdev);
2003 }
2004
mt_on_hid_hw_open(struct hid_device * hdev)2005 static void mt_on_hid_hw_open(struct hid_device *hdev)
2006 {
2007 mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
2008 }
2009
mt_on_hid_hw_close(struct hid_device * hdev)2010 static void mt_on_hid_hw_close(struct hid_device *hdev)
2011 {
2012 mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_NONE);
2013 }
2014
2015 /*
2016 * This list contains only:
2017 * - VID/PID of products not working with the default multitouch handling
2018 * - 2 generic rules.
2019 * So there is no point in adding here any device with MT_CLS_DEFAULT.
2020 */
2021 static const struct hid_device_id mt_devices[] = {
2022
2023 /* 3M panels */
2024 { .driver_data = MT_CLS_3M,
2025 MT_USB_DEVICE(USB_VENDOR_ID_3M,
2026 USB_DEVICE_ID_3M1968) },
2027 { .driver_data = MT_CLS_3M,
2028 MT_USB_DEVICE(USB_VENDOR_ID_3M,
2029 USB_DEVICE_ID_3M2256) },
2030 { .driver_data = MT_CLS_3M,
2031 MT_USB_DEVICE(USB_VENDOR_ID_3M,
2032 USB_DEVICE_ID_3M3266) },
2033
2034 /* Anton devices */
2035 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
2036 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
2037 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
2038
2039 /* Asus T101HA */
2040 { .driver_data = MT_CLS_WIN_8_DISABLE_WAKEUP,
2041 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2042 USB_VENDOR_ID_ASUSTEK,
2043 USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD) },
2044
2045 /* Asus T304UA */
2046 { .driver_data = MT_CLS_ASUS,
2047 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2048 USB_VENDOR_ID_ASUSTEK,
2049 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
2050
2051 /* Atmel panels */
2052 { .driver_data = MT_CLS_SERIAL,
2053 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
2054 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
2055
2056 /* Baanto multitouch devices */
2057 { .driver_data = MT_CLS_NSMU,
2058 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
2059 USB_DEVICE_ID_BAANTO_MT_190W2) },
2060
2061 /* Cando panels */
2062 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
2063 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2064 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
2065 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
2066 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2067 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
2068
2069 /* Chunghwa Telecom touch panels */
2070 { .driver_data = MT_CLS_NSMU,
2071 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
2072 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
2073
2074 /* CJTouch panels */
2075 { .driver_data = MT_CLS_NSMU,
2076 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
2077 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
2078 { .driver_data = MT_CLS_NSMU,
2079 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
2080 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
2081
2082 /* CVTouch panels */
2083 { .driver_data = MT_CLS_NSMU,
2084 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
2085 USB_DEVICE_ID_CVTOUCH_SCREEN) },
2086
2087 /* eGalax devices (SAW) */
2088 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
2089 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2090 USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER) },
2091
2092 /* eGalax devices (resistive) */
2093 { .driver_data = MT_CLS_EGALAX,
2094 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2095 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
2096 { .driver_data = MT_CLS_EGALAX,
2097 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2098 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
2099
2100 /* eGalax devices (capacitive) */
2101 { .driver_data = MT_CLS_EGALAX_SERIAL,
2102 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2103 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
2104 { .driver_data = MT_CLS_EGALAX,
2105 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2106 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
2107 { .driver_data = MT_CLS_EGALAX_SERIAL,
2108 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2109 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
2110 { .driver_data = MT_CLS_EGALAX_SERIAL,
2111 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2112 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
2113 { .driver_data = MT_CLS_EGALAX_SERIAL,
2114 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2115 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
2116 { .driver_data = MT_CLS_EGALAX_SERIAL,
2117 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2118 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
2119 { .driver_data = MT_CLS_EGALAX,
2120 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2121 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
2122 { .driver_data = MT_CLS_EGALAX,
2123 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2124 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
2125 { .driver_data = MT_CLS_EGALAX_SERIAL,
2126 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2127 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
2128 { .driver_data = MT_CLS_EGALAX,
2129 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
2130 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
2131 { .driver_data = MT_CLS_EGALAX,
2132 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
2133 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
2134 { .driver_data = MT_CLS_EGALAX,
2135 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2136 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
2137 { .driver_data = MT_CLS_EGALAX,
2138 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2139 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
2140 { .driver_data = MT_CLS_EGALAX_SERIAL,
2141 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2142 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
2143 { .driver_data = MT_CLS_EGALAX_SERIAL,
2144 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2145 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
2146 { .driver_data = MT_CLS_EGALAX_SERIAL,
2147 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2148 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
2149 { .driver_data = MT_CLS_EGALAX,
2150 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2151 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
2152
2153 /* Elan devices */
2154 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2155 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2156 USB_VENDOR_ID_ELAN, 0x313a) },
2157
2158 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2159 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2160 USB_VENDOR_ID_ELAN, 0x3148) },
2161
2162 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2163 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2164 USB_VENDOR_ID_ELAN, 0x32ae) },
2165
2166 /* Elitegroup panel */
2167 { .driver_data = MT_CLS_SERIAL,
2168 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
2169 USB_DEVICE_ID_ELITEGROUP_05D8) },
2170
2171 /* Flatfrog Panels */
2172 { .driver_data = MT_CLS_FLATFROG,
2173 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
2174 USB_DEVICE_ID_MULTITOUCH_3200) },
2175
2176 /* FocalTech Panels */
2177 { .driver_data = MT_CLS_SERIAL,
2178 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
2179 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
2180
2181 /* GeneralTouch panel */
2182 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2183 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2184 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
2185 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2186 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2187 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
2188 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2189 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2190 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
2191 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2192 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2193 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
2194 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2195 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2196 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
2197 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2198 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2199 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
2200 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2201 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2202 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
2203
2204 /* Gametel game controller */
2205 { .driver_data = MT_CLS_NSMU,
2206 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
2207 USB_DEVICE_ID_GAMETEL_MT_MODE) },
2208
2209 /* Goodix GT7868Q devices */
2210 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2211 HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX,
2212 I2C_DEVICE_ID_GOODIX_01E8) },
2213 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2214 HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX,
2215 I2C_DEVICE_ID_GOODIX_01E9) },
2216
2217 /* GoodTouch panels */
2218 { .driver_data = MT_CLS_NSMU,
2219 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
2220 USB_DEVICE_ID_GOODTOUCH_000f) },
2221
2222 /* Hanvon panels */
2223 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2224 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
2225 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
2226
2227 /* HONOR GLO-GXXX panel */
2228 { .driver_data = MT_CLS_VTL,
2229 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2230 0x347d, 0x7853) },
2231
2232 /* HONOR MagicBook Art 14 touchpad */
2233 { .driver_data = MT_CLS_VTL,
2234 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2235 0x35cc, 0x0104) },
2236
2237 /* Ilitek dual touch panel */
2238 { .driver_data = MT_CLS_NSMU,
2239 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
2240 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
2241
2242 /* LG Melfas panel */
2243 { .driver_data = MT_CLS_LG,
2244 HID_USB_DEVICE(USB_VENDOR_ID_LG,
2245 USB_DEVICE_ID_LG_MELFAS_MT) },
2246 { .driver_data = MT_CLS_LG,
2247 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
2248 USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
2249
2250 /* Lenovo X1 TAB Gen 1 */
2251 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2252 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2253 USB_VENDOR_ID_LENOVO,
2254 USB_DEVICE_ID_LENOVO_X1_TAB) },
2255
2256 /* Lenovo X1 TAB Gen 2 */
2257 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2258 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2259 USB_VENDOR_ID_LENOVO,
2260 USB_DEVICE_ID_LENOVO_X1_TAB2) },
2261
2262 /* Lenovo X1 TAB Gen 3 */
2263 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2264 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2265 USB_VENDOR_ID_LENOVO,
2266 USB_DEVICE_ID_LENOVO_X1_TAB3) },
2267
2268 /* Lenovo X12 TAB Gen 1 */
2269 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2270 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2271 USB_VENDOR_ID_LENOVO,
2272 USB_DEVICE_ID_LENOVO_X12_TAB) },
2273
2274 /* Lenovo X12 TAB Gen 2 */
2275 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2276 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2277 USB_VENDOR_ID_LENOVO,
2278 USB_DEVICE_ID_LENOVO_X12_TAB2) },
2279
2280 /* Logitech devices */
2281 { .driver_data = MT_CLS_NSMU,
2282 HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH_WIN_8,
2283 USB_VENDOR_ID_LOGITECH,
2284 USB_DEVICE_ID_LOGITECH_CASA_TOUCHPAD) },
2285 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2286 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2287 USB_VENDOR_ID_LOGITECH,
2288 USB_DEVICE_ID_LOGITECH_BOLT_RECEIVER) },
2289
2290 /* MosArt panels */
2291 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2292 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2293 USB_DEVICE_ID_ASUS_T91MT)},
2294 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2295 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2296 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
2297 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2298 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
2299 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
2300
2301 /* Novatek Panel */
2302 { .driver_data = MT_CLS_NSMU,
2303 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2304 USB_DEVICE_ID_NOVATEK_PCT) },
2305
2306 /* Ntrig Panel */
2307 { .driver_data = MT_CLS_NSMU,
2308 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2309 USB_VENDOR_ID_NTRIG, 0x1b05) },
2310
2311 /* Panasonic panels */
2312 { .driver_data = MT_CLS_PANASONIC,
2313 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2314 USB_DEVICE_ID_PANABOARD_UBT780) },
2315 { .driver_data = MT_CLS_PANASONIC,
2316 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2317 USB_DEVICE_ID_PANABOARD_UBT880) },
2318
2319 /* PixArt optical touch screen */
2320 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2321 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2322 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2323 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2324 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2325 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2326 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2327 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2328 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2329
2330 /* PixCir-based panels */
2331 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2332 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2333 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2334
2335 /* Quanta-based panels */
2336 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2337 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2338 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2339
2340 /* Razer touchpads */
2341 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2342 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2343 USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2344
2345 /* Smart Tech panels */
2346 { .driver_data = MT_CLS_SMART_TECH,
2347 MT_USB_DEVICE(0x0b8c, 0x0092)},
2348
2349 /* Stantum panels */
2350 { .driver_data = MT_CLS_CONFIDENCE,
2351 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2352 USB_DEVICE_ID_MTP_STM)},
2353
2354 /* Synaptics devices */
2355 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2356 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2357 USB_VENDOR_ID_SYNAPTICS, 0xcd7e) },
2358
2359 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2360 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2361 USB_VENDOR_ID_SYNAPTICS, 0xcddc) },
2362
2363 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2364 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2365 USB_VENDOR_ID_SYNAPTICS, 0xce08) },
2366
2367 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2368 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2369 USB_VENDOR_ID_SYNAPTICS, 0xce09) },
2370
2371 /* TopSeed panels */
2372 { .driver_data = MT_CLS_TOPSEED,
2373 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2374 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2375
2376 /* Touch International panels */
2377 { .driver_data = MT_CLS_NSMU,
2378 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2379 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2380
2381 /* Unitec panels */
2382 { .driver_data = MT_CLS_NSMU,
2383 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2384 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2385 { .driver_data = MT_CLS_NSMU,
2386 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2387 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2388
2389 /* VTL panels */
2390 { .driver_data = MT_CLS_VTL,
2391 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2392 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2393
2394 /* Winbond Electronics Corp. */
2395 { .driver_data = MT_CLS_WIN_8_NO_STICKY_FINGERS,
2396 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2397 USB_VENDOR_ID_WINBOND, USB_DEVICE_ID_TSTP_MTOUCH) },
2398
2399 /* Wistron panels */
2400 { .driver_data = MT_CLS_NSMU,
2401 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2402 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2403
2404 /* XAT */
2405 { .driver_data = MT_CLS_NSMU,
2406 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2407 USB_DEVICE_ID_XAT_CSR) },
2408
2409 /* Xiroku */
2410 { .driver_data = MT_CLS_NSMU,
2411 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2412 USB_DEVICE_ID_XIROKU_SPX) },
2413 { .driver_data = MT_CLS_NSMU,
2414 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2415 USB_DEVICE_ID_XIROKU_MPX) },
2416 { .driver_data = MT_CLS_NSMU,
2417 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2418 USB_DEVICE_ID_XIROKU_CSR) },
2419 { .driver_data = MT_CLS_NSMU,
2420 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2421 USB_DEVICE_ID_XIROKU_SPX1) },
2422 { .driver_data = MT_CLS_NSMU,
2423 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2424 USB_DEVICE_ID_XIROKU_MPX1) },
2425 { .driver_data = MT_CLS_NSMU,
2426 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2427 USB_DEVICE_ID_XIROKU_CSR1) },
2428 { .driver_data = MT_CLS_NSMU,
2429 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2430 USB_DEVICE_ID_XIROKU_SPX2) },
2431 { .driver_data = MT_CLS_NSMU,
2432 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2433 USB_DEVICE_ID_XIROKU_MPX2) },
2434 { .driver_data = MT_CLS_NSMU,
2435 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2436 USB_DEVICE_ID_XIROKU_CSR2) },
2437
2438 /* Apple Touch Bar */
2439 { .driver_data = MT_CLS_APPLE_TOUCHBAR,
2440 HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
2441 USB_DEVICE_ID_APPLE_TOUCHBAR_DISPLAY) },
2442
2443 /* Google MT devices */
2444 { .driver_data = MT_CLS_GOOGLE,
2445 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2446 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2447 { .driver_data = MT_CLS_GOOGLE,
2448 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_GOOGLE,
2449 USB_DEVICE_ID_GOOGLE_WHISKERS) },
2450
2451 /* sis */
2452 { .driver_data = MT_CLS_SIS,
2453 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_SIS_TOUCH,
2454 HID_ANY_ID) },
2455
2456 /* Hantick */
2457 { .driver_data = MT_CLS_NSMU,
2458 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2459 I2C_VENDOR_ID_HANTICK, I2C_PRODUCT_ID_HANTICK_5288) },
2460
2461 /* Generic MT device */
2462 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2463
2464 /* Generic Win 8 certified MT device */
2465 { .driver_data = MT_CLS_WIN_8,
2466 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2467 HID_ANY_ID, HID_ANY_ID) },
2468 { }
2469 };
2470 MODULE_DEVICE_TABLE(hid, mt_devices);
2471
2472 static const struct hid_usage_id mt_grabbed_usages[] = {
2473 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2474 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2475 };
2476
2477 static struct hid_driver mt_driver = {
2478 .name = "hid-multitouch",
2479 .id_table = mt_devices,
2480 .probe = mt_probe,
2481 .remove = mt_remove,
2482 .input_mapping = mt_input_mapping,
2483 .input_mapped = mt_input_mapped,
2484 .input_configured = mt_input_configured,
2485 .feature_mapping = mt_feature_mapping,
2486 .usage_table = mt_grabbed_usages,
2487 .event = mt_event,
2488 .report_fixup = mt_report_fixup,
2489 .report = mt_report,
2490 .suspend = pm_ptr(mt_suspend),
2491 .reset_resume = pm_ptr(mt_reset_resume),
2492 .resume = pm_ptr(mt_resume),
2493 .on_hid_hw_open = mt_on_hid_hw_open,
2494 .on_hid_hw_close = mt_on_hid_hw_close,
2495 };
2496 module_hid_driver(mt_driver);
2497