1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * HID driver for multitouch panels
4 *
5 * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
6 * Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
7 * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
8 * Copyright (c) 2012-2013 Red Hat, Inc
9 *
10 * This code is partly based on hid-egalax.c:
11 *
12 * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
13 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
14 * Copyright (c) 2010 Canonical, Ltd.
15 *
16 * This code is partly based on hid-3m-pct.c:
17 *
18 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
19 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
20 * Copyright (c) 2010 Canonical, Ltd.
21 */
22
23 /*
24 */
25
26 /*
27 * This driver is regularly tested thanks to the test suite in hid-tools[1].
28 * Please run these regression tests before patching this module so that
29 * your patch won't break existing known devices.
30 *
31 * [1] https://gitlab.freedesktop.org/libevdev/hid-tools
32 */
33
34 #include <linux/device.h>
35 #include <linux/hid.h>
36 #include <linux/module.h>
37 #include <linux/slab.h>
38 #include <linux/input/mt.h>
39 #include <linux/jiffies.h>
40 #include <linux/string.h>
41 #include <linux/timer.h>
42
43
44 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
45 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
46 MODULE_DESCRIPTION("HID multitouch panels");
47 MODULE_LICENSE("GPL");
48
49 #include "hid-ids.h"
50
51 /* quirks to control the device */
52 #define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0)
53 #define MT_QUIRK_SLOT_IS_CONTACTID BIT(1)
54 #define MT_QUIRK_CYPRESS BIT(2)
55 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER BIT(3)
56 #define MT_QUIRK_ALWAYS_VALID BIT(4)
57 #define MT_QUIRK_VALID_IS_INRANGE BIT(5)
58 #define MT_QUIRK_VALID_IS_CONFIDENCE BIT(6)
59 #define MT_QUIRK_CONFIDENCE BIT(7)
60 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE BIT(8)
61 #define MT_QUIRK_NO_AREA BIT(9)
62 #define MT_QUIRK_IGNORE_DUPLICATES BIT(10)
63 #define MT_QUIRK_HOVERING BIT(11)
64 #define MT_QUIRK_CONTACT_CNT_ACCURATE BIT(12)
65 #define MT_QUIRK_FORCE_GET_FEATURE BIT(13)
66 #define MT_QUIRK_FIX_CONST_CONTACT_ID BIT(14)
67 #define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15)
68 #define MT_QUIRK_STICKY_FINGERS BIT(16)
69 #define MT_QUIRK_ASUS_CUSTOM_UP BIT(17)
70 #define MT_QUIRK_WIN8_PTP_BUTTONS BIT(18)
71 #define MT_QUIRK_SEPARATE_APP_REPORT BIT(19)
72 #define MT_QUIRK_FORCE_MULTI_INPUT BIT(20)
73 #define MT_QUIRK_DISABLE_WAKEUP BIT(21)
74
75 #define MT_INPUTMODE_TOUCHSCREEN 0x02
76 #define MT_INPUTMODE_TOUCHPAD 0x03
77
78 #define MT_BUTTONTYPE_CLICKPAD 0
79
80 enum latency_mode {
81 HID_LATENCY_NORMAL = 0,
82 HID_LATENCY_HIGH = 1,
83 };
84
85 #define MT_IO_FLAGS_RUNNING 0
86 #define MT_IO_FLAGS_ACTIVE_SLOTS 1
87 #define MT_IO_FLAGS_PENDING_SLOTS 2
88
89 static const bool mtrue = true; /* default for true */
90 static const bool mfalse; /* default for false */
91 static const __s32 mzero; /* default for 0 */
92
93 #define DEFAULT_TRUE ((void *)&mtrue)
94 #define DEFAULT_FALSE ((void *)&mfalse)
95 #define DEFAULT_ZERO ((void *)&mzero)
96
97 struct mt_usages {
98 struct list_head list;
99 __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
100 __s32 *contactid; /* the device ContactID assigned to this slot */
101 bool *tip_state; /* is the touch valid? */
102 bool *inrange_state; /* is the finger in proximity of the sensor? */
103 bool *confidence_state; /* is the touch made by a finger? */
104 };
105
106 struct mt_application {
107 struct list_head list;
108 unsigned int application;
109 unsigned int report_id;
110 struct list_head mt_usages; /* mt usages list */
111
112 __s32 quirks;
113
114 __s32 *scantime; /* scantime reported */
115 __s32 scantime_logical_max; /* max value for raw scantime */
116
117 __s32 *raw_cc; /* contact count in the report */
118 int left_button_state; /* left button state */
119 unsigned int mt_flags; /* flags to pass to input-mt */
120
121 unsigned long *pending_palm_slots; /* slots where we reported palm
122 * and need to release */
123
124 __u8 num_received; /* how many contacts we received */
125 __u8 num_expected; /* expected last contact index */
126 __u8 buttons_count; /* number of physical buttons per touchpad */
127 __u8 touches_by_report; /* how many touches are present in one report:
128 * 1 means we should use a serial protocol
129 * > 1 means hybrid (multitouch) protocol
130 */
131
132 __s32 dev_time; /* the scan time provided by the device */
133 unsigned long jiffies; /* the frame's jiffies */
134 int timestamp; /* the timestamp to be sent */
135 int prev_scantime; /* scantime reported previously */
136
137 bool have_contact_count;
138 };
139
140 struct mt_class {
141 __s32 name; /* MT_CLS */
142 __s32 quirks;
143 __s32 sn_move; /* Signal/noise ratio for move events */
144 __s32 sn_width; /* Signal/noise ratio for width events */
145 __s32 sn_height; /* Signal/noise ratio for height events */
146 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
147 __u8 maxcontacts;
148 bool is_indirect; /* true for touchpads */
149 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
150 };
151
152 struct mt_report_data {
153 struct list_head list;
154 struct hid_report *report;
155 struct mt_application *application;
156 bool is_mt_collection;
157 };
158
159 struct mt_device {
160 struct mt_class mtclass; /* our mt device class */
161 struct timer_list release_timer; /* to release sticky fingers */
162 struct hid_device *hdev; /* hid_device we're attached to */
163 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
164 __u8 inputmode_value; /* InputMode HID feature value */
165 __u8 maxcontacts;
166 bool is_buttonpad; /* is this device a button pad? */
167 bool serial_maybe; /* need to check for serial protocol */
168
169 struct list_head applications;
170 struct list_head reports;
171 };
172
173 static void mt_post_parse_default_settings(struct mt_device *td,
174 struct mt_application *app);
175 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
176
177 /* classes of device behavior */
178 #define MT_CLS_DEFAULT 0x0001
179
180 #define MT_CLS_SERIAL 0x0002
181 #define MT_CLS_CONFIDENCE 0x0003
182 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
183 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
184 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
185 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
186 /* reserved 0x0008 */
187 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
188 #define MT_CLS_NSMU 0x000a
189 /* reserved 0x0010 */
190 /* reserved 0x0011 */
191 #define MT_CLS_WIN_8 0x0012
192 #define MT_CLS_EXPORT_ALL_INPUTS 0x0013
193 /* reserved 0x0014 */
194 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT 0x0015
195 #define MT_CLS_WIN_8_DISABLE_WAKEUP 0x0016
196 #define MT_CLS_WIN_8_NO_STICKY_FINGERS 0x0017
197 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU 0x0018
198
199 /* vendor specific classes */
200 #define MT_CLS_3M 0x0101
201 /* reserved 0x0102 */
202 #define MT_CLS_EGALAX 0x0103
203 #define MT_CLS_EGALAX_SERIAL 0x0104
204 #define MT_CLS_TOPSEED 0x0105
205 #define MT_CLS_PANASONIC 0x0106
206 #define MT_CLS_FLATFROG 0x0107
207 #define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
208 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
209 #define MT_CLS_LG 0x010a
210 #define MT_CLS_ASUS 0x010b
211 #define MT_CLS_VTL 0x0110
212 #define MT_CLS_GOOGLE 0x0111
213 #define MT_CLS_RAZER_BLADE_STEALTH 0x0112
214 #define MT_CLS_SMART_TECH 0x0113
215
216 #define MT_DEFAULT_MAXCONTACT 10
217 #define MT_MAX_MAXCONTACT 250
218
219 /*
220 * Resync device and local timestamps after that many microseconds without
221 * receiving data.
222 */
223 #define MAX_TIMESTAMP_INTERVAL 1000000
224
225 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
226 #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
227
228 /*
229 * these device-dependent functions determine what slot corresponds
230 * to a valid contact that was just read.
231 */
232
cypress_compute_slot(struct mt_application * application,struct mt_usages * slot)233 static int cypress_compute_slot(struct mt_application *application,
234 struct mt_usages *slot)
235 {
236 if (*slot->contactid != 0 || application->num_received == 0)
237 return *slot->contactid;
238 else
239 return -1;
240 }
241
242 static const struct mt_class mt_classes[] = {
243 { .name = MT_CLS_DEFAULT,
244 .quirks = MT_QUIRK_ALWAYS_VALID |
245 MT_QUIRK_CONTACT_CNT_ACCURATE },
246 { .name = MT_CLS_NSMU,
247 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
248 { .name = MT_CLS_SERIAL,
249 .quirks = MT_QUIRK_ALWAYS_VALID},
250 { .name = MT_CLS_CONFIDENCE,
251 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
252 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
253 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
254 MT_QUIRK_SLOT_IS_CONTACTID },
255 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
256 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
257 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
258 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
259 .quirks = MT_QUIRK_VALID_IS_INRANGE |
260 MT_QUIRK_SLOT_IS_CONTACTID,
261 .maxcontacts = 2 },
262 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
263 .quirks = MT_QUIRK_VALID_IS_INRANGE |
264 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
265 .maxcontacts = 2 },
266 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
267 .quirks = MT_QUIRK_VALID_IS_INRANGE |
268 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
269 { .name = MT_CLS_WIN_8,
270 .quirks = MT_QUIRK_ALWAYS_VALID |
271 MT_QUIRK_IGNORE_DUPLICATES |
272 MT_QUIRK_HOVERING |
273 MT_QUIRK_CONTACT_CNT_ACCURATE |
274 MT_QUIRK_STICKY_FINGERS |
275 MT_QUIRK_WIN8_PTP_BUTTONS,
276 .export_all_inputs = true },
277 { .name = MT_CLS_EXPORT_ALL_INPUTS,
278 .quirks = MT_QUIRK_ALWAYS_VALID |
279 MT_QUIRK_CONTACT_CNT_ACCURATE,
280 .export_all_inputs = true },
281 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
282 .quirks = MT_QUIRK_ALWAYS_VALID |
283 MT_QUIRK_IGNORE_DUPLICATES |
284 MT_QUIRK_HOVERING |
285 MT_QUIRK_CONTACT_CNT_ACCURATE |
286 MT_QUIRK_STICKY_FINGERS |
287 MT_QUIRK_WIN8_PTP_BUTTONS |
288 MT_QUIRK_FORCE_MULTI_INPUT,
289 .export_all_inputs = true },
290 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
291 .quirks = 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 MT_QUIRK_FORCE_MULTI_INPUT |
297 MT_QUIRK_NOT_SEEN_MEANS_UP,
298 .export_all_inputs = true },
299 { .name = MT_CLS_WIN_8_DISABLE_WAKEUP,
300 .quirks = MT_QUIRK_ALWAYS_VALID |
301 MT_QUIRK_IGNORE_DUPLICATES |
302 MT_QUIRK_HOVERING |
303 MT_QUIRK_CONTACT_CNT_ACCURATE |
304 MT_QUIRK_STICKY_FINGERS |
305 MT_QUIRK_WIN8_PTP_BUTTONS |
306 MT_QUIRK_DISABLE_WAKEUP,
307 .export_all_inputs = true },
308 { .name = MT_CLS_WIN_8_NO_STICKY_FINGERS,
309 .quirks = MT_QUIRK_ALWAYS_VALID |
310 MT_QUIRK_IGNORE_DUPLICATES |
311 MT_QUIRK_HOVERING |
312 MT_QUIRK_CONTACT_CNT_ACCURATE |
313 MT_QUIRK_WIN8_PTP_BUTTONS,
314 .export_all_inputs = true },
315
316 /*
317 * vendor specific classes
318 */
319 { .name = MT_CLS_3M,
320 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
321 MT_QUIRK_SLOT_IS_CONTACTID |
322 MT_QUIRK_TOUCH_SIZE_SCALING,
323 .sn_move = 2048,
324 .sn_width = 128,
325 .sn_height = 128,
326 .maxcontacts = 60,
327 },
328 { .name = MT_CLS_EGALAX,
329 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
330 MT_QUIRK_VALID_IS_INRANGE,
331 .sn_move = 4096,
332 .sn_pressure = 32,
333 },
334 { .name = MT_CLS_EGALAX_SERIAL,
335 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
336 MT_QUIRK_ALWAYS_VALID,
337 .sn_move = 4096,
338 .sn_pressure = 32,
339 },
340 { .name = MT_CLS_TOPSEED,
341 .quirks = MT_QUIRK_ALWAYS_VALID,
342 .is_indirect = true,
343 .maxcontacts = 2,
344 },
345 { .name = MT_CLS_PANASONIC,
346 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
347 .maxcontacts = 4 },
348 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
349 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
350 MT_QUIRK_VALID_IS_INRANGE |
351 MT_QUIRK_SLOT_IS_CONTACTID,
352 .maxcontacts = 2
353 },
354 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
355 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
356 MT_QUIRK_SLOT_IS_CONTACTID
357 },
358
359 { .name = MT_CLS_FLATFROG,
360 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
361 MT_QUIRK_NO_AREA,
362 .sn_move = 2048,
363 .maxcontacts = 40,
364 },
365 { .name = MT_CLS_LG,
366 .quirks = MT_QUIRK_ALWAYS_VALID |
367 MT_QUIRK_FIX_CONST_CONTACT_ID |
368 MT_QUIRK_IGNORE_DUPLICATES |
369 MT_QUIRK_HOVERING |
370 MT_QUIRK_CONTACT_CNT_ACCURATE },
371 { .name = MT_CLS_ASUS,
372 .quirks = MT_QUIRK_ALWAYS_VALID |
373 MT_QUIRK_CONTACT_CNT_ACCURATE |
374 MT_QUIRK_ASUS_CUSTOM_UP },
375 { .name = MT_CLS_VTL,
376 .quirks = MT_QUIRK_ALWAYS_VALID |
377 MT_QUIRK_CONTACT_CNT_ACCURATE |
378 MT_QUIRK_FORCE_GET_FEATURE,
379 },
380 { .name = MT_CLS_GOOGLE,
381 .quirks = MT_QUIRK_ALWAYS_VALID |
382 MT_QUIRK_CONTACT_CNT_ACCURATE |
383 MT_QUIRK_SLOT_IS_CONTACTID |
384 MT_QUIRK_HOVERING
385 },
386 { .name = MT_CLS_RAZER_BLADE_STEALTH,
387 .quirks = MT_QUIRK_ALWAYS_VALID |
388 MT_QUIRK_IGNORE_DUPLICATES |
389 MT_QUIRK_HOVERING |
390 MT_QUIRK_CONTACT_CNT_ACCURATE |
391 MT_QUIRK_WIN8_PTP_BUTTONS,
392 },
393 { .name = MT_CLS_SMART_TECH,
394 .quirks = MT_QUIRK_ALWAYS_VALID |
395 MT_QUIRK_IGNORE_DUPLICATES |
396 MT_QUIRK_CONTACT_CNT_ACCURATE |
397 MT_QUIRK_SEPARATE_APP_REPORT,
398 },
399 { }
400 };
401
mt_show_quirks(struct device * dev,struct device_attribute * attr,char * buf)402 static ssize_t mt_show_quirks(struct device *dev,
403 struct device_attribute *attr,
404 char *buf)
405 {
406 struct hid_device *hdev = to_hid_device(dev);
407 struct mt_device *td = hid_get_drvdata(hdev);
408
409 return sprintf(buf, "%u\n", td->mtclass.quirks);
410 }
411
mt_set_quirks(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)412 static ssize_t mt_set_quirks(struct device *dev,
413 struct device_attribute *attr,
414 const char *buf, size_t count)
415 {
416 struct hid_device *hdev = to_hid_device(dev);
417 struct mt_device *td = hid_get_drvdata(hdev);
418 struct mt_application *application;
419
420 unsigned long val;
421
422 if (kstrtoul(buf, 0, &val))
423 return -EINVAL;
424
425 td->mtclass.quirks = val;
426
427 list_for_each_entry(application, &td->applications, list) {
428 application->quirks = val;
429 if (!application->have_contact_count)
430 application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
431 }
432
433 return count;
434 }
435
436 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
437
438 static struct attribute *sysfs_attrs[] = {
439 &dev_attr_quirks.attr,
440 NULL
441 };
442
443 static const struct attribute_group mt_attribute_group = {
444 .attrs = sysfs_attrs
445 };
446
mt_get_feature(struct hid_device * hdev,struct hid_report * report)447 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
448 {
449 int ret;
450 u32 size = hid_report_len(report);
451 u8 *buf;
452
453 /*
454 * Do not fetch the feature report if the device has been explicitly
455 * marked as non-capable.
456 */
457 if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
458 return;
459
460 buf = hid_alloc_report_buf(report, GFP_KERNEL);
461 if (!buf)
462 return;
463
464 ret = hid_hw_raw_request(hdev, report->id, buf, size,
465 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
466 if (ret < 0) {
467 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
468 report->id);
469 } else {
470 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
471 size, 0);
472 if (ret)
473 dev_warn(&hdev->dev, "failed to report feature\n");
474 }
475
476 kfree(buf);
477 }
478
mt_feature_mapping(struct hid_device * hdev,struct hid_field * field,struct hid_usage * usage)479 static void mt_feature_mapping(struct hid_device *hdev,
480 struct hid_field *field, struct hid_usage *usage)
481 {
482 struct mt_device *td = hid_get_drvdata(hdev);
483
484 switch (usage->hid) {
485 case HID_DG_CONTACTMAX:
486 mt_get_feature(hdev, field->report);
487
488 td->maxcontacts = field->value[0];
489 if (!td->maxcontacts &&
490 field->logical_maximum <= MT_MAX_MAXCONTACT)
491 td->maxcontacts = field->logical_maximum;
492 if (td->mtclass.maxcontacts)
493 /* check if the maxcontacts is given by the class */
494 td->maxcontacts = td->mtclass.maxcontacts;
495
496 break;
497 case HID_DG_BUTTONTYPE:
498 if (usage->usage_index >= field->report_count) {
499 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
500 break;
501 }
502
503 mt_get_feature(hdev, field->report);
504 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
505 td->is_buttonpad = true;
506
507 break;
508 case 0xff0000c5:
509 /* Retrieve the Win8 blob once to enable some devices */
510 if (usage->usage_index == 0)
511 mt_get_feature(hdev, field->report);
512 break;
513 }
514 }
515
set_abs(struct input_dev * input,unsigned int code,struct hid_field * field,int snratio)516 static void set_abs(struct input_dev *input, unsigned int code,
517 struct hid_field *field, int snratio)
518 {
519 int fmin = field->logical_minimum;
520 int fmax = field->logical_maximum;
521 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
522 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
523 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
524 }
525
mt_allocate_usage(struct hid_device * hdev,struct mt_application * application)526 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
527 struct mt_application *application)
528 {
529 struct mt_usages *usage;
530
531 usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
532 if (!usage)
533 return NULL;
534
535 /* set some defaults so we do not need to check for null pointers */
536 usage->x = DEFAULT_ZERO;
537 usage->y = DEFAULT_ZERO;
538 usage->cx = DEFAULT_ZERO;
539 usage->cy = DEFAULT_ZERO;
540 usage->p = DEFAULT_ZERO;
541 usage->w = DEFAULT_ZERO;
542 usage->h = DEFAULT_ZERO;
543 usage->a = DEFAULT_ZERO;
544 usage->contactid = DEFAULT_ZERO;
545 usage->tip_state = DEFAULT_FALSE;
546 usage->inrange_state = DEFAULT_FALSE;
547 usage->confidence_state = DEFAULT_TRUE;
548
549 list_add_tail(&usage->list, &application->mt_usages);
550
551 return usage;
552 }
553
mt_allocate_application(struct mt_device * td,struct hid_report * report)554 static struct mt_application *mt_allocate_application(struct mt_device *td,
555 struct hid_report *report)
556 {
557 unsigned int application = report->application;
558 struct mt_application *mt_application;
559
560 mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
561 GFP_KERNEL);
562 if (!mt_application)
563 return NULL;
564
565 mt_application->application = application;
566 INIT_LIST_HEAD(&mt_application->mt_usages);
567
568 if (application == HID_DG_TOUCHSCREEN)
569 mt_application->mt_flags |= INPUT_MT_DIRECT;
570
571 /*
572 * Model touchscreens providing buttons as touchpads.
573 */
574 if (application == HID_DG_TOUCHPAD) {
575 mt_application->mt_flags |= INPUT_MT_POINTER;
576 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
577 }
578
579 mt_application->scantime = DEFAULT_ZERO;
580 mt_application->raw_cc = DEFAULT_ZERO;
581 mt_application->quirks = td->mtclass.quirks;
582 mt_application->report_id = report->id;
583
584 list_add_tail(&mt_application->list, &td->applications);
585
586 return mt_application;
587 }
588
mt_find_application(struct mt_device * td,struct hid_report * report)589 static struct mt_application *mt_find_application(struct mt_device *td,
590 struct hid_report *report)
591 {
592 unsigned int application = report->application;
593 struct mt_application *tmp, *mt_application = NULL;
594
595 list_for_each_entry(tmp, &td->applications, list) {
596 if (application == tmp->application) {
597 if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
598 tmp->report_id == report->id) {
599 mt_application = tmp;
600 break;
601 }
602 }
603 }
604
605 if (!mt_application)
606 mt_application = mt_allocate_application(td, report);
607
608 return mt_application;
609 }
610
mt_allocate_report_data(struct mt_device * td,struct hid_report * report)611 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
612 struct hid_report *report)
613 {
614 struct mt_report_data *rdata;
615 struct hid_field *field;
616 int r, n;
617
618 rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
619 if (!rdata)
620 return NULL;
621
622 rdata->report = report;
623 rdata->application = mt_find_application(td, report);
624
625 if (!rdata->application) {
626 devm_kfree(&td->hdev->dev, rdata);
627 return NULL;
628 }
629
630 for (r = 0; r < report->maxfield; r++) {
631 field = report->field[r];
632
633 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
634 continue;
635
636 if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) {
637 for (n = 0; n < field->report_count; n++) {
638 if (field->usage[n].hid == HID_DG_CONTACTID) {
639 rdata->is_mt_collection = true;
640 break;
641 }
642 }
643 }
644 }
645
646 list_add_tail(&rdata->list, &td->reports);
647
648 return rdata;
649 }
650
mt_find_report_data(struct mt_device * td,struct hid_report * report)651 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
652 struct hid_report *report)
653 {
654 struct mt_report_data *tmp, *rdata = NULL;
655
656 list_for_each_entry(tmp, &td->reports, list) {
657 if (report == tmp->report) {
658 rdata = tmp;
659 break;
660 }
661 }
662
663 if (!rdata)
664 rdata = mt_allocate_report_data(td, report);
665
666 return rdata;
667 }
668
mt_store_field(struct hid_device * hdev,struct mt_application * application,__s32 * value,size_t offset)669 static void mt_store_field(struct hid_device *hdev,
670 struct mt_application *application,
671 __s32 *value,
672 size_t offset)
673 {
674 struct mt_usages *usage;
675 __s32 **target;
676
677 if (list_empty(&application->mt_usages))
678 usage = mt_allocate_usage(hdev, application);
679 else
680 usage = list_last_entry(&application->mt_usages,
681 struct mt_usages,
682 list);
683
684 if (!usage)
685 return;
686
687 target = (__s32 **)((char *)usage + offset);
688
689 /* the value has already been filled, create a new slot */
690 if (*target != DEFAULT_TRUE &&
691 *target != DEFAULT_FALSE &&
692 *target != DEFAULT_ZERO) {
693 if (usage->contactid == DEFAULT_ZERO ||
694 usage->x == DEFAULT_ZERO ||
695 usage->y == DEFAULT_ZERO) {
696 hid_dbg(hdev,
697 "ignoring duplicate usage on incomplete");
698 return;
699 }
700 usage = mt_allocate_usage(hdev, application);
701 if (!usage)
702 return;
703
704 target = (__s32 **)((char *)usage + offset);
705 }
706
707 *target = value;
708 }
709
710 #define MT_STORE_FIELD(__name) \
711 mt_store_field(hdev, app, \
712 &field->value[usage->usage_index], \
713 offsetof(struct mt_usages, __name))
714
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)715 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
716 struct hid_field *field, struct hid_usage *usage,
717 unsigned long **bit, int *max, struct mt_application *app)
718 {
719 struct mt_device *td = hid_get_drvdata(hdev);
720 struct mt_class *cls = &td->mtclass;
721 int code;
722 struct hid_usage *prev_usage = NULL;
723
724 /*
725 * Model touchscreens providing buttons as touchpads.
726 */
727 if (field->application == HID_DG_TOUCHSCREEN &&
728 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
729 app->mt_flags |= INPUT_MT_POINTER;
730 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
731 }
732
733 /* count the buttons on touchpads */
734 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
735 app->buttons_count++;
736
737 if (usage->usage_index)
738 prev_usage = &field->usage[usage->usage_index - 1];
739
740 switch (usage->hid & HID_USAGE_PAGE) {
741
742 case HID_UP_GENDESK:
743 switch (usage->hid) {
744 case HID_GD_X:
745 if (prev_usage && (prev_usage->hid == usage->hid)) {
746 code = ABS_MT_TOOL_X;
747 MT_STORE_FIELD(cx);
748 } else {
749 code = ABS_MT_POSITION_X;
750 MT_STORE_FIELD(x);
751 }
752
753 set_abs(hi->input, code, field, cls->sn_move);
754
755 /*
756 * A system multi-axis that exports X and Y has a high
757 * chance of being used directly on a surface
758 */
759 if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
760 __set_bit(INPUT_PROP_DIRECT,
761 hi->input->propbit);
762 input_set_abs_params(hi->input,
763 ABS_MT_TOOL_TYPE,
764 MT_TOOL_DIAL,
765 MT_TOOL_DIAL, 0, 0);
766 }
767
768 return 1;
769 case HID_GD_Y:
770 if (prev_usage && (prev_usage->hid == usage->hid)) {
771 code = ABS_MT_TOOL_Y;
772 MT_STORE_FIELD(cy);
773 } else {
774 code = ABS_MT_POSITION_Y;
775 MT_STORE_FIELD(y);
776 }
777
778 set_abs(hi->input, code, field, cls->sn_move);
779
780 return 1;
781 }
782 return 0;
783
784 case HID_UP_DIGITIZER:
785 switch (usage->hid) {
786 case HID_DG_INRANGE:
787 if (app->quirks & MT_QUIRK_HOVERING) {
788 input_set_abs_params(hi->input,
789 ABS_MT_DISTANCE, 0, 1, 0, 0);
790 }
791 MT_STORE_FIELD(inrange_state);
792 return 1;
793 case HID_DG_CONFIDENCE:
794 if ((cls->name == MT_CLS_WIN_8 ||
795 cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT ||
796 cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU ||
797 cls->name == MT_CLS_WIN_8_DISABLE_WAKEUP) &&
798 (field->application == HID_DG_TOUCHPAD ||
799 field->application == HID_DG_TOUCHSCREEN))
800 app->quirks |= MT_QUIRK_CONFIDENCE;
801
802 if (app->quirks & MT_QUIRK_CONFIDENCE)
803 input_set_abs_params(hi->input,
804 ABS_MT_TOOL_TYPE,
805 MT_TOOL_FINGER,
806 MT_TOOL_PALM, 0, 0);
807
808 MT_STORE_FIELD(confidence_state);
809 return 1;
810 case HID_DG_TIPSWITCH:
811 if (field->application != HID_GD_SYSTEM_MULTIAXIS)
812 input_set_capability(hi->input,
813 EV_KEY, BTN_TOUCH);
814 MT_STORE_FIELD(tip_state);
815 return 1;
816 case HID_DG_CONTACTID:
817 MT_STORE_FIELD(contactid);
818 app->touches_by_report++;
819 return 1;
820 case HID_DG_WIDTH:
821 if (!(app->quirks & MT_QUIRK_NO_AREA))
822 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
823 cls->sn_width);
824 MT_STORE_FIELD(w);
825 return 1;
826 case HID_DG_HEIGHT:
827 if (!(app->quirks & MT_QUIRK_NO_AREA)) {
828 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
829 cls->sn_height);
830
831 /*
832 * Only set ABS_MT_ORIENTATION if it is not
833 * already set by the HID_DG_AZIMUTH usage.
834 */
835 if (!test_bit(ABS_MT_ORIENTATION,
836 hi->input->absbit))
837 input_set_abs_params(hi->input,
838 ABS_MT_ORIENTATION, 0, 1, 0, 0);
839 }
840 MT_STORE_FIELD(h);
841 return 1;
842 case HID_DG_TIPPRESSURE:
843 set_abs(hi->input, ABS_MT_PRESSURE, field,
844 cls->sn_pressure);
845 MT_STORE_FIELD(p);
846 return 1;
847 case HID_DG_SCANTIME:
848 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
849 app->scantime = &field->value[usage->usage_index];
850 app->scantime_logical_max = field->logical_maximum;
851 return 1;
852 case HID_DG_CONTACTCOUNT:
853 app->have_contact_count = true;
854 app->raw_cc = &field->value[usage->usage_index];
855 return 1;
856 case HID_DG_AZIMUTH:
857 /*
858 * Azimuth has the range of [0, MAX) representing a full
859 * revolution. Set ABS_MT_ORIENTATION to a quarter of
860 * MAX according the definition of ABS_MT_ORIENTATION
861 */
862 input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
863 -field->logical_maximum / 4,
864 field->logical_maximum / 4,
865 cls->sn_move ?
866 field->logical_maximum / cls->sn_move : 0, 0);
867 MT_STORE_FIELD(a);
868 return 1;
869 case HID_DG_CONTACTMAX:
870 /* contact max are global to the report */
871 return -1;
872 case HID_DG_TOUCH:
873 /* Legacy devices use TIPSWITCH and not TOUCH.
874 * Let's just ignore this field. */
875 return -1;
876 }
877 /* let hid-input decide for the others */
878 return 0;
879
880 case HID_UP_BUTTON:
881 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
882 /*
883 * MS PTP spec says that external buttons left and right have
884 * usages 2 and 3.
885 */
886 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
887 field->application == HID_DG_TOUCHPAD &&
888 (usage->hid & HID_USAGE) > 1)
889 code--;
890
891 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
892 code = BTN_0 + ((usage->hid - 1) & HID_USAGE);
893
894 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
895 if (!*bit)
896 return -1;
897 input_set_capability(hi->input, EV_KEY, code);
898 return 1;
899
900 case 0xff000000:
901 /* we do not want to map these: no input-oriented meaning */
902 return -1;
903 }
904
905 return 0;
906 }
907
mt_compute_slot(struct mt_device * td,struct mt_application * app,struct mt_usages * slot,struct input_dev * input)908 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
909 struct mt_usages *slot,
910 struct input_dev *input)
911 {
912 __s32 quirks = app->quirks;
913
914 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
915 return *slot->contactid;
916
917 if (quirks & MT_QUIRK_CYPRESS)
918 return cypress_compute_slot(app, slot);
919
920 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
921 return app->num_received;
922
923 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
924 return *slot->contactid - 1;
925
926 return input_mt_get_slot_by_key(input, *slot->contactid);
927 }
928
mt_release_pending_palms(struct mt_device * td,struct mt_application * app,struct input_dev * input)929 static void mt_release_pending_palms(struct mt_device *td,
930 struct mt_application *app,
931 struct input_dev *input)
932 {
933 int slotnum;
934 bool need_sync = false;
935
936 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
937 clear_bit(slotnum, app->pending_palm_slots);
938
939 input_mt_slot(input, slotnum);
940 input_mt_report_slot_inactive(input);
941
942 need_sync = true;
943 }
944
945 if (need_sync) {
946 input_mt_sync_frame(input);
947 input_sync(input);
948 }
949 }
950
951 /*
952 * this function is called when a whole packet has been received and processed,
953 * so that it can decide what to send to the input layer.
954 */
mt_sync_frame(struct mt_device * td,struct mt_application * app,struct input_dev * input)955 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
956 struct input_dev *input)
957 {
958 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
959 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
960
961 input_mt_sync_frame(input);
962 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
963 input_sync(input);
964
965 mt_release_pending_palms(td, app, input);
966
967 app->num_received = 0;
968 app->left_button_state = 0;
969
970 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
971 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
972 else
973 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
974 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
975 }
976
mt_compute_timestamp(struct mt_application * app,__s32 value)977 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
978 {
979 long delta = value - app->prev_scantime;
980 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
981
982 app->jiffies = jiffies;
983
984 if (delta < 0)
985 delta += app->scantime_logical_max;
986
987 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
988 delta *= 100;
989
990 if (jdelta > MAX_TIMESTAMP_INTERVAL)
991 /* No data received for a while, resync the timestamp. */
992 return 0;
993 else
994 return app->timestamp + delta;
995 }
996
mt_touch_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)997 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
998 struct hid_usage *usage, __s32 value)
999 {
1000 /* we will handle the hidinput part later, now remains hiddev */
1001 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
1002 hid->hiddev_hid_event(hid, field, usage, value);
1003
1004 return 1;
1005 }
1006
mt_process_slot(struct mt_device * td,struct input_dev * input,struct mt_application * app,struct mt_usages * slot)1007 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
1008 struct mt_application *app,
1009 struct mt_usages *slot)
1010 {
1011 struct input_mt *mt = input->mt;
1012 __s32 quirks = app->quirks;
1013 bool valid = true;
1014 bool confidence_state = true;
1015 bool inrange_state = false;
1016 int active;
1017 int slotnum;
1018 int tool = MT_TOOL_FINGER;
1019
1020 if (!slot)
1021 return -EINVAL;
1022
1023 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
1024 app->num_received >= app->num_expected)
1025 return -EAGAIN;
1026
1027 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
1028 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
1029 valid = *slot->inrange_state;
1030 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1031 valid = *slot->tip_state;
1032 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
1033 valid = *slot->confidence_state;
1034
1035 if (!valid)
1036 return 0;
1037 }
1038
1039 slotnum = mt_compute_slot(td, app, slot, input);
1040 if (slotnum < 0 || slotnum >= td->maxcontacts)
1041 return 0;
1042
1043 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1044 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1045
1046 if (input_mt_is_active(i_slot) &&
1047 input_mt_is_used(mt, i_slot))
1048 return -EAGAIN;
1049 }
1050
1051 if (quirks & MT_QUIRK_CONFIDENCE)
1052 confidence_state = *slot->confidence_state;
1053
1054 if (quirks & MT_QUIRK_HOVERING)
1055 inrange_state = *slot->inrange_state;
1056
1057 active = *slot->tip_state || inrange_state;
1058
1059 if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1060 tool = MT_TOOL_DIAL;
1061 else if (unlikely(!confidence_state)) {
1062 tool = MT_TOOL_PALM;
1063 if (!active && mt &&
1064 input_mt_is_active(&mt->slots[slotnum])) {
1065 /*
1066 * The non-confidence was reported for
1067 * previously valid contact that is also no
1068 * longer valid. We can't simply report
1069 * lift-off as userspace will not be aware
1070 * of non-confidence, so we need to split
1071 * it into 2 events: active MT_TOOL_PALM
1072 * and a separate liftoff.
1073 */
1074 active = true;
1075 set_bit(slotnum, app->pending_palm_slots);
1076 }
1077 }
1078
1079 input_mt_slot(input, slotnum);
1080 input_mt_report_slot_state(input, tool, active);
1081 if (active) {
1082 /* this finger is in proximity of the sensor */
1083 int wide = (*slot->w > *slot->h);
1084 int major = max(*slot->w, *slot->h);
1085 int minor = min(*slot->w, *slot->h);
1086 int orientation = wide;
1087 int max_azimuth;
1088 int azimuth;
1089
1090 if (slot->a != DEFAULT_ZERO) {
1091 /*
1092 * Azimuth is counter-clockwise and ranges from [0, MAX)
1093 * (a full revolution). Convert it to clockwise ranging
1094 * [-MAX/2, MAX/2].
1095 *
1096 * Note that ABS_MT_ORIENTATION require us to report
1097 * the limit of [-MAX/4, MAX/4], but the value can go
1098 * out of range to [-MAX/2, MAX/2] to report an upside
1099 * down ellipsis.
1100 */
1101 azimuth = *slot->a;
1102 max_azimuth = input_abs_get_max(input,
1103 ABS_MT_ORIENTATION);
1104 if (azimuth > max_azimuth * 2)
1105 azimuth -= max_azimuth * 4;
1106 orientation = -azimuth;
1107 }
1108
1109 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1110 /*
1111 * divided by two to match visual scale of touch
1112 * for devices with this quirk
1113 */
1114 major = major >> 1;
1115 minor = minor >> 1;
1116 }
1117
1118 input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
1119 input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
1120 input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
1121 input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy);
1122 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1123 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1124 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1125 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1126 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1127
1128 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1129 }
1130
1131 return 0;
1132 }
1133
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)1134 static void mt_process_mt_event(struct hid_device *hid,
1135 struct mt_application *app,
1136 struct hid_field *field,
1137 struct hid_usage *usage,
1138 __s32 value,
1139 bool first_packet)
1140 {
1141 __s32 quirks = app->quirks;
1142 struct input_dev *input = field->hidinput->input;
1143
1144 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1145 return;
1146
1147 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1148
1149 /*
1150 * For Win8 PTP touchpads we should only look at
1151 * non finger/touch events in the first_packet of a
1152 * (possible) multi-packet frame.
1153 */
1154 if (!first_packet)
1155 return;
1156
1157 /*
1158 * For Win8 PTP touchpads we map both the clickpad click
1159 * and any "external" left buttons to BTN_LEFT if a
1160 * device claims to have both we need to report 1 for
1161 * BTN_LEFT if either is pressed, so we or all values
1162 * together and report the result in mt_sync_frame().
1163 */
1164 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1165 app->left_button_state |= value;
1166 return;
1167 }
1168 }
1169
1170 input_event(input, usage->type, usage->code, value);
1171 }
1172
mt_touch_report(struct hid_device * hid,struct mt_report_data * rdata)1173 static void mt_touch_report(struct hid_device *hid,
1174 struct mt_report_data *rdata)
1175 {
1176 struct mt_device *td = hid_get_drvdata(hid);
1177 struct hid_report *report = rdata->report;
1178 struct mt_application *app = rdata->application;
1179 struct hid_field *field;
1180 struct input_dev *input;
1181 struct mt_usages *slot;
1182 bool first_packet;
1183 unsigned count;
1184 int r, n;
1185 int scantime = 0;
1186 int contact_count = -1;
1187
1188 /* sticky fingers release in progress, abort */
1189 if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1190 return;
1191
1192 scantime = *app->scantime;
1193 app->timestamp = mt_compute_timestamp(app, scantime);
1194 if (app->raw_cc != DEFAULT_ZERO)
1195 contact_count = *app->raw_cc;
1196
1197 /*
1198 * Includes multi-packet support where subsequent
1199 * packets are sent with zero contactcount.
1200 */
1201 if (contact_count >= 0) {
1202 /*
1203 * For Win8 PTPs the first packet (td->num_received == 0) may
1204 * have a contactcount of 0 if there only is a button event.
1205 * We double check that this is not a continuation packet
1206 * of a possible multi-packet frame be checking that the
1207 * timestamp has changed.
1208 */
1209 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1210 app->num_received == 0 &&
1211 app->prev_scantime != scantime)
1212 app->num_expected = contact_count;
1213 /* A non 0 contact count always indicates a first packet */
1214 else if (contact_count)
1215 app->num_expected = contact_count;
1216 }
1217 app->prev_scantime = scantime;
1218
1219 first_packet = app->num_received == 0;
1220
1221 input = report->field[0]->hidinput->input;
1222
1223 list_for_each_entry(slot, &app->mt_usages, list) {
1224 if (!mt_process_slot(td, input, app, slot))
1225 app->num_received++;
1226 }
1227
1228 for (r = 0; r < report->maxfield; r++) {
1229 field = report->field[r];
1230 count = field->report_count;
1231
1232 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1233 continue;
1234
1235 for (n = 0; n < count; n++)
1236 mt_process_mt_event(hid, app, field,
1237 &field->usage[n], field->value[n],
1238 first_packet);
1239 }
1240
1241 if (app->num_received >= app->num_expected)
1242 mt_sync_frame(td, app, input);
1243
1244 /*
1245 * Windows 8 specs says 2 things:
1246 * - once a contact has been reported, it has to be reported in each
1247 * subsequent report
1248 * - the report rate when fingers are present has to be at least
1249 * the refresh rate of the screen, 60 or 120 Hz
1250 *
1251 * I interprete this that the specification forces a report rate of
1252 * at least 60 Hz for a touchscreen to be certified.
1253 * Which means that if we do not get a report whithin 16 ms, either
1254 * something wrong happens, either the touchscreen forgets to send
1255 * a release. Taking a reasonable margin allows to remove issues
1256 * with USB communication or the load of the machine.
1257 *
1258 * Given that Win 8 devices are forced to send a release, this will
1259 * only affect laggish machines and the ones that have a firmware
1260 * defect.
1261 */
1262 if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1263 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1264 mod_timer(&td->release_timer,
1265 jiffies + msecs_to_jiffies(100));
1266 else
1267 del_timer(&td->release_timer);
1268 }
1269
1270 clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1271 }
1272
mt_touch_input_configured(struct hid_device * hdev,struct hid_input * hi,struct mt_application * app)1273 static int mt_touch_input_configured(struct hid_device *hdev,
1274 struct hid_input *hi,
1275 struct mt_application *app)
1276 {
1277 struct mt_device *td = hid_get_drvdata(hdev);
1278 struct mt_class *cls = &td->mtclass;
1279 struct input_dev *input = hi->input;
1280 int ret;
1281
1282 if (!td->maxcontacts)
1283 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1284
1285 mt_post_parse(td, app);
1286 if (td->serial_maybe)
1287 mt_post_parse_default_settings(td, app);
1288
1289 if (cls->is_indirect)
1290 app->mt_flags |= INPUT_MT_POINTER;
1291
1292 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1293 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1294
1295 /* check for clickpads */
1296 if ((app->mt_flags & INPUT_MT_POINTER) &&
1297 (app->buttons_count == 1))
1298 td->is_buttonpad = true;
1299
1300 if (td->is_buttonpad)
1301 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1302
1303 app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1304 BITS_TO_LONGS(td->maxcontacts),
1305 sizeof(long),
1306 GFP_KERNEL);
1307 if (!app->pending_palm_slots)
1308 return -ENOMEM;
1309
1310 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1311 if (ret)
1312 return ret;
1313
1314 app->mt_flags = 0;
1315 return 0;
1316 }
1317
1318 #define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1319 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)1320 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1321 struct hid_field *field, struct hid_usage *usage,
1322 unsigned long **bit, int *max)
1323 {
1324 struct mt_device *td = hid_get_drvdata(hdev);
1325 struct mt_application *application;
1326 struct mt_report_data *rdata;
1327
1328 rdata = mt_find_report_data(td, field->report);
1329 if (!rdata) {
1330 hid_err(hdev, "failed to allocate data for report\n");
1331 return 0;
1332 }
1333
1334 application = rdata->application;
1335
1336 /*
1337 * If mtclass.export_all_inputs is not set, only map fields from
1338 * TouchScreen or TouchPad collections. We need to ignore fields
1339 * that belong to other collections such as Mouse that might have
1340 * the same GenericDesktop usages.
1341 */
1342 if (!td->mtclass.export_all_inputs &&
1343 field->application != HID_DG_TOUCHSCREEN &&
1344 field->application != HID_DG_PEN &&
1345 field->application != HID_DG_TOUCHPAD &&
1346 field->application != HID_GD_KEYBOARD &&
1347 field->application != HID_GD_SYSTEM_CONTROL &&
1348 field->application != HID_CP_CONSUMER_CONTROL &&
1349 field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1350 field->application != HID_GD_SYSTEM_MULTIAXIS &&
1351 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1352 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1353 return -1;
1354
1355 /*
1356 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1357 * touchpad report descriptor. We need to treat these as an array to
1358 * map usages to input keys.
1359 */
1360 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1361 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1362 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1363 set_bit(EV_REP, hi->input->evbit);
1364 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1365 field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1366 switch (usage->hid & HID_USAGE) {
1367 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
1368 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
1369 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
1370 case 0x6b: mt_map_key_clear(KEY_F21); break;
1371 case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
1372 default:
1373 return -1;
1374 }
1375 return 1;
1376 }
1377
1378 if (rdata->is_mt_collection)
1379 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1380 application);
1381
1382 /*
1383 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1384 * for the stylus. Overwrite the hid_input application
1385 */
1386 if (field->physical == HID_DG_STYLUS)
1387 hi->application = HID_DG_STYLUS;
1388
1389 /* let hid-core decide for the others */
1390 return 0;
1391 }
1392
mt_input_mapped(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)1393 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1394 struct hid_field *field, struct hid_usage *usage,
1395 unsigned long **bit, int *max)
1396 {
1397 struct mt_device *td = hid_get_drvdata(hdev);
1398 struct mt_report_data *rdata;
1399
1400 rdata = mt_find_report_data(td, field->report);
1401 if (rdata && rdata->is_mt_collection) {
1402 /* We own these mappings, tell hid-input to ignore them */
1403 return -1;
1404 }
1405
1406 /* let hid-core decide for the others */
1407 return 0;
1408 }
1409
mt_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1410 static int mt_event(struct hid_device *hid, struct hid_field *field,
1411 struct hid_usage *usage, __s32 value)
1412 {
1413 struct mt_device *td = hid_get_drvdata(hid);
1414 struct mt_report_data *rdata;
1415
1416 rdata = mt_find_report_data(td, field->report);
1417 if (rdata && rdata->is_mt_collection)
1418 return mt_touch_event(hid, field, usage, value);
1419
1420 return 0;
1421 }
1422
mt_report(struct hid_device * hid,struct hid_report * report)1423 static void mt_report(struct hid_device *hid, struct hid_report *report)
1424 {
1425 struct mt_device *td = hid_get_drvdata(hid);
1426 struct hid_field *field = report->field[0];
1427 struct mt_report_data *rdata;
1428
1429 if (!(hid->claimed & HID_CLAIMED_INPUT))
1430 return;
1431
1432 rdata = mt_find_report_data(td, report);
1433 if (rdata && rdata->is_mt_collection)
1434 return mt_touch_report(hid, rdata);
1435
1436 if (field && field->hidinput && field->hidinput->input)
1437 input_sync(field->hidinput->input);
1438 }
1439
mt_need_to_apply_feature(struct hid_device * hdev,struct hid_field * field,struct hid_usage * usage,enum latency_mode latency,bool surface_switch,bool button_switch,bool * inputmode_found)1440 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1441 struct hid_field *field,
1442 struct hid_usage *usage,
1443 enum latency_mode latency,
1444 bool surface_switch,
1445 bool button_switch,
1446 bool *inputmode_found)
1447 {
1448 struct mt_device *td = hid_get_drvdata(hdev);
1449 struct mt_class *cls = &td->mtclass;
1450 struct hid_report *report = field->report;
1451 unsigned int index = usage->usage_index;
1452 char *buf;
1453 u32 report_len;
1454 int max;
1455
1456 switch (usage->hid) {
1457 case HID_DG_INPUTMODE:
1458 /*
1459 * Some elan panels wrongly declare 2 input mode features,
1460 * and silently ignore when we set the value in the second
1461 * field. Skip the second feature and hope for the best.
1462 */
1463 if (*inputmode_found)
1464 return false;
1465
1466 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1467 report_len = hid_report_len(report);
1468 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1469 if (!buf) {
1470 hid_err(hdev,
1471 "failed to allocate buffer for report\n");
1472 return false;
1473 }
1474 hid_hw_raw_request(hdev, report->id, buf, report_len,
1475 HID_FEATURE_REPORT,
1476 HID_REQ_GET_REPORT);
1477 kfree(buf);
1478 }
1479
1480 field->value[index] = td->inputmode_value;
1481 *inputmode_found = true;
1482 return true;
1483
1484 case HID_DG_CONTACTMAX:
1485 if (cls->maxcontacts) {
1486 max = min_t(int, field->logical_maximum,
1487 cls->maxcontacts);
1488 if (field->value[index] != max) {
1489 field->value[index] = max;
1490 return true;
1491 }
1492 }
1493 break;
1494
1495 case HID_DG_LATENCYMODE:
1496 field->value[index] = latency;
1497 return true;
1498
1499 case HID_DG_SURFACESWITCH:
1500 field->value[index] = surface_switch;
1501 return true;
1502
1503 case HID_DG_BUTTONSWITCH:
1504 field->value[index] = button_switch;
1505 return true;
1506 }
1507
1508 return false; /* no need to update the report */
1509 }
1510
mt_set_modes(struct hid_device * hdev,enum latency_mode latency,bool surface_switch,bool button_switch)1511 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1512 bool surface_switch, bool button_switch)
1513 {
1514 struct hid_report_enum *rep_enum;
1515 struct hid_report *rep;
1516 struct hid_usage *usage;
1517 int i, j;
1518 bool update_report;
1519 bool inputmode_found = false;
1520
1521 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1522 list_for_each_entry(rep, &rep_enum->report_list, list) {
1523 update_report = false;
1524
1525 for (i = 0; i < rep->maxfield; i++) {
1526 /* Ignore if report count is out of bounds. */
1527 if (rep->field[i]->report_count < 1)
1528 continue;
1529
1530 for (j = 0; j < rep->field[i]->maxusage; j++) {
1531 usage = &rep->field[i]->usage[j];
1532
1533 if (mt_need_to_apply_feature(hdev,
1534 rep->field[i],
1535 usage,
1536 latency,
1537 surface_switch,
1538 button_switch,
1539 &inputmode_found))
1540 update_report = true;
1541 }
1542 }
1543
1544 if (update_report)
1545 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1546 }
1547 }
1548
mt_post_parse_default_settings(struct mt_device * td,struct mt_application * app)1549 static void mt_post_parse_default_settings(struct mt_device *td,
1550 struct mt_application *app)
1551 {
1552 __s32 quirks = app->quirks;
1553
1554 /* unknown serial device needs special quirks */
1555 if (list_is_singular(&app->mt_usages)) {
1556 quirks |= MT_QUIRK_ALWAYS_VALID;
1557 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1558 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1559 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1560 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1561 }
1562
1563 app->quirks = quirks;
1564 }
1565
mt_post_parse(struct mt_device * td,struct mt_application * app)1566 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1567 {
1568 if (!app->have_contact_count)
1569 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1570 }
1571
mt_input_configured(struct hid_device * hdev,struct hid_input * hi)1572 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1573 {
1574 struct mt_device *td = hid_get_drvdata(hdev);
1575 char *name;
1576 const char *suffix = NULL;
1577 struct mt_report_data *rdata;
1578 struct mt_application *mt_application = NULL;
1579 struct hid_report *report;
1580 int ret;
1581
1582 list_for_each_entry(report, &hi->reports, hidinput_list) {
1583 rdata = mt_find_report_data(td, report);
1584 if (!rdata) {
1585 hid_err(hdev, "failed to allocate data for report\n");
1586 return -ENOMEM;
1587 }
1588
1589 mt_application = rdata->application;
1590
1591 if (rdata->is_mt_collection) {
1592 ret = mt_touch_input_configured(hdev, hi,
1593 mt_application);
1594 if (ret)
1595 return ret;
1596 }
1597 }
1598
1599 switch (hi->application) {
1600 case HID_GD_KEYBOARD:
1601 case HID_GD_KEYPAD:
1602 case HID_GD_MOUSE:
1603 case HID_DG_TOUCHPAD:
1604 case HID_GD_SYSTEM_CONTROL:
1605 case HID_CP_CONSUMER_CONTROL:
1606 case HID_GD_WIRELESS_RADIO_CTLS:
1607 case HID_GD_SYSTEM_MULTIAXIS:
1608 /* already handled by hid core */
1609 break;
1610 case HID_DG_TOUCHSCREEN:
1611 /* we do not set suffix = "Touchscreen" */
1612 hi->input->name = hdev->name;
1613 break;
1614 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1615 suffix = "Custom Media Keys";
1616 break;
1617 case HID_DG_STYLUS:
1618 /* force BTN_STYLUS to allow tablet matching in udev */
1619 __set_bit(BTN_STYLUS, hi->input->keybit);
1620 break;
1621 default:
1622 suffix = "UNKNOWN";
1623 break;
1624 }
1625
1626 if (suffix) {
1627 name = devm_kzalloc(&hi->input->dev,
1628 strlen(hdev->name) + strlen(suffix) + 2,
1629 GFP_KERNEL);
1630 if (name) {
1631 sprintf(name, "%s %s", hdev->name, suffix);
1632 hi->input->name = name;
1633 }
1634 }
1635
1636 return 0;
1637 }
1638
mt_fix_const_field(struct hid_field * field,unsigned int usage)1639 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1640 {
1641 if (field->usage[0].hid != usage ||
1642 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1643 return;
1644
1645 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1646 field->flags |= HID_MAIN_ITEM_VARIABLE;
1647 }
1648
mt_fix_const_fields(struct hid_device * hdev,unsigned int usage)1649 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1650 {
1651 struct hid_report *report;
1652 int i;
1653
1654 list_for_each_entry(report,
1655 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1656 list) {
1657
1658 if (!report->maxfield)
1659 continue;
1660
1661 for (i = 0; i < report->maxfield; i++)
1662 if (report->field[i]->maxusage >= 1)
1663 mt_fix_const_field(report->field[i], usage);
1664 }
1665 }
1666
mt_release_contacts(struct hid_device * hid)1667 static void mt_release_contacts(struct hid_device *hid)
1668 {
1669 struct hid_input *hidinput;
1670 struct mt_application *application;
1671 struct mt_device *td = hid_get_drvdata(hid);
1672
1673 list_for_each_entry(hidinput, &hid->inputs, list) {
1674 struct input_dev *input_dev = hidinput->input;
1675 struct input_mt *mt = input_dev->mt;
1676 int i;
1677
1678 if (mt) {
1679 for (i = 0; i < mt->num_slots; i++) {
1680 input_mt_slot(input_dev, i);
1681 input_mt_report_slot_inactive(input_dev);
1682 }
1683 input_mt_sync_frame(input_dev);
1684 input_sync(input_dev);
1685 }
1686 }
1687
1688 list_for_each_entry(application, &td->applications, list) {
1689 application->num_received = 0;
1690 }
1691 }
1692
mt_expired_timeout(struct timer_list * t)1693 static void mt_expired_timeout(struct timer_list *t)
1694 {
1695 struct mt_device *td = from_timer(td, t, release_timer);
1696 struct hid_device *hdev = td->hdev;
1697
1698 /*
1699 * An input report came in just before we release the sticky fingers,
1700 * it will take care of the sticky fingers.
1701 */
1702 if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1703 return;
1704 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1705 mt_release_contacts(hdev);
1706 clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1707 }
1708
mt_probe(struct hid_device * hdev,const struct hid_device_id * id)1709 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1710 {
1711 int ret, i;
1712 struct mt_device *td;
1713 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1714
1715 for (i = 0; mt_classes[i].name ; i++) {
1716 if (id->driver_data == mt_classes[i].name) {
1717 mtclass = &(mt_classes[i]);
1718 break;
1719 }
1720 }
1721
1722 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1723 if (!td) {
1724 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1725 return -ENOMEM;
1726 }
1727 td->hdev = hdev;
1728 td->mtclass = *mtclass;
1729 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1730 hid_set_drvdata(hdev, td);
1731
1732 INIT_LIST_HEAD(&td->applications);
1733 INIT_LIST_HEAD(&td->reports);
1734
1735 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1736 td->serial_maybe = true;
1737
1738 /* This allows the driver to correctly support devices
1739 * that emit events over several HID messages.
1740 */
1741 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1742
1743 /*
1744 * This allows the driver to handle different input sensors
1745 * that emits events through different applications on the same HID
1746 * device.
1747 */
1748 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1749
1750 if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1751 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1752
1753 if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) {
1754 hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP;
1755 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1756 }
1757
1758 timer_setup(&td->release_timer, mt_expired_timeout, 0);
1759
1760 ret = hid_parse(hdev);
1761 if (ret != 0)
1762 return ret;
1763
1764 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1765 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1766
1767 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1768 if (ret)
1769 return ret;
1770
1771 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1772 if (ret)
1773 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1774 hdev->name);
1775
1776 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1777
1778 return 0;
1779 }
1780
1781 #ifdef CONFIG_PM
mt_suspend(struct hid_device * hdev,pm_message_t state)1782 static int mt_suspend(struct hid_device *hdev, pm_message_t state)
1783 {
1784 struct mt_device *td = hid_get_drvdata(hdev);
1785
1786 /* High latency is desirable for power savings during S3/S0ix */
1787 if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) ||
1788 !hid_hw_may_wakeup(hdev))
1789 mt_set_modes(hdev, HID_LATENCY_HIGH, false, false);
1790 else
1791 mt_set_modes(hdev, HID_LATENCY_HIGH, true, true);
1792
1793 return 0;
1794 }
1795
mt_reset_resume(struct hid_device * hdev)1796 static int mt_reset_resume(struct hid_device *hdev)
1797 {
1798 mt_release_contacts(hdev);
1799 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1800 return 0;
1801 }
1802
mt_resume(struct hid_device * hdev)1803 static int mt_resume(struct hid_device *hdev)
1804 {
1805 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1806 * It should be safe to send it to other devices too.
1807 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1808
1809 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1810
1811 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1812
1813 return 0;
1814 }
1815 #endif
1816
mt_remove(struct hid_device * hdev)1817 static void mt_remove(struct hid_device *hdev)
1818 {
1819 struct mt_device *td = hid_get_drvdata(hdev);
1820
1821 del_timer_sync(&td->release_timer);
1822
1823 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1824 hid_hw_stop(hdev);
1825 }
1826
1827 /*
1828 * This list contains only:
1829 * - VID/PID of products not working with the default multitouch handling
1830 * - 2 generic rules.
1831 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1832 */
1833 static const struct hid_device_id mt_devices[] = {
1834
1835 /* 3M panels */
1836 { .driver_data = MT_CLS_3M,
1837 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1838 USB_DEVICE_ID_3M1968) },
1839 { .driver_data = MT_CLS_3M,
1840 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1841 USB_DEVICE_ID_3M2256) },
1842 { .driver_data = MT_CLS_3M,
1843 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1844 USB_DEVICE_ID_3M3266) },
1845
1846 /* Anton devices */
1847 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1848 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1849 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1850
1851 /* Asus T101HA */
1852 { .driver_data = MT_CLS_WIN_8_DISABLE_WAKEUP,
1853 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1854 USB_VENDOR_ID_ASUSTEK,
1855 USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD) },
1856
1857 /* Asus T304UA */
1858 { .driver_data = MT_CLS_ASUS,
1859 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1860 USB_VENDOR_ID_ASUSTEK,
1861 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1862
1863 /* Atmel panels */
1864 { .driver_data = MT_CLS_SERIAL,
1865 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1866 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1867
1868 /* Baanto multitouch devices */
1869 { .driver_data = MT_CLS_NSMU,
1870 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1871 USB_DEVICE_ID_BAANTO_MT_190W2) },
1872
1873 /* Cando panels */
1874 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1875 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1876 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1877 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1878 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1879 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1880
1881 /* Chunghwa Telecom touch panels */
1882 { .driver_data = MT_CLS_NSMU,
1883 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1884 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1885
1886 /* CJTouch panels */
1887 { .driver_data = MT_CLS_NSMU,
1888 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1889 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1890 { .driver_data = MT_CLS_NSMU,
1891 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1892 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1893
1894 /* CVTouch panels */
1895 { .driver_data = MT_CLS_NSMU,
1896 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1897 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1898
1899 /* eGalax devices (SAW) */
1900 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1901 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1902 USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER) },
1903
1904 /* eGalax devices (resistive) */
1905 { .driver_data = MT_CLS_EGALAX,
1906 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1907 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1908 { .driver_data = MT_CLS_EGALAX,
1909 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1910 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1911
1912 /* eGalax devices (capacitive) */
1913 { .driver_data = MT_CLS_EGALAX_SERIAL,
1914 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1915 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1916 { .driver_data = MT_CLS_EGALAX,
1917 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1918 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1919 { .driver_data = MT_CLS_EGALAX_SERIAL,
1920 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1921 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1922 { .driver_data = MT_CLS_EGALAX_SERIAL,
1923 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1924 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1925 { .driver_data = MT_CLS_EGALAX_SERIAL,
1926 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1927 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1928 { .driver_data = MT_CLS_EGALAX_SERIAL,
1929 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1930 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1931 { .driver_data = MT_CLS_EGALAX,
1932 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1933 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1934 { .driver_data = MT_CLS_EGALAX,
1935 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1936 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1937 { .driver_data = MT_CLS_EGALAX_SERIAL,
1938 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1939 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1940 { .driver_data = MT_CLS_EGALAX,
1941 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1942 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1943 { .driver_data = MT_CLS_EGALAX,
1944 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1945 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1946 { .driver_data = MT_CLS_EGALAX,
1947 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1948 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1949 { .driver_data = MT_CLS_EGALAX,
1950 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1951 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1952 { .driver_data = MT_CLS_EGALAX_SERIAL,
1953 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1954 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1955 { .driver_data = MT_CLS_EGALAX_SERIAL,
1956 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1957 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1958 { .driver_data = MT_CLS_EGALAX_SERIAL,
1959 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1960 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1961 { .driver_data = MT_CLS_EGALAX,
1962 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1963 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
1964
1965 /* Elan devices */
1966 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1967 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1968 USB_VENDOR_ID_ELAN, 0x313a) },
1969
1970 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1971 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1972 USB_VENDOR_ID_ELAN, 0x3148) },
1973
1974 /* Elitegroup panel */
1975 { .driver_data = MT_CLS_SERIAL,
1976 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1977 USB_DEVICE_ID_ELITEGROUP_05D8) },
1978
1979 /* Flatfrog Panels */
1980 { .driver_data = MT_CLS_FLATFROG,
1981 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1982 USB_DEVICE_ID_MULTITOUCH_3200) },
1983
1984 /* FocalTech Panels */
1985 { .driver_data = MT_CLS_SERIAL,
1986 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1987 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1988
1989 /* GeneralTouch panel */
1990 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1991 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1992 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1993 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1994 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1995 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1996 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1997 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1998 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1999 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2000 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2001 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
2002 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2003 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2004 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
2005 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2006 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2007 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
2008 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2009 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2010 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
2011
2012 /* Gametel game controller */
2013 { .driver_data = MT_CLS_NSMU,
2014 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
2015 USB_DEVICE_ID_GAMETEL_MT_MODE) },
2016
2017 /* GoodTouch panels */
2018 { .driver_data = MT_CLS_NSMU,
2019 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
2020 USB_DEVICE_ID_GOODTOUCH_000f) },
2021
2022 /* Hanvon panels */
2023 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2024 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
2025 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
2026
2027 /* Ilitek dual touch panel */
2028 { .driver_data = MT_CLS_NSMU,
2029 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
2030 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
2031
2032 /* LG Melfas panel */
2033 { .driver_data = MT_CLS_LG,
2034 HID_USB_DEVICE(USB_VENDOR_ID_LG,
2035 USB_DEVICE_ID_LG_MELFAS_MT) },
2036 { .driver_data = MT_CLS_LG,
2037 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
2038 USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
2039
2040 /* Lenovo X1 TAB Gen 2 */
2041 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2042 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2043 USB_VENDOR_ID_LENOVO,
2044 USB_DEVICE_ID_LENOVO_X1_TAB) },
2045
2046 /* Lenovo X1 TAB Gen 3 */
2047 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2048 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2049 USB_VENDOR_ID_LENOVO,
2050 USB_DEVICE_ID_LENOVO_X1_TAB3) },
2051
2052 /* Lenovo X12 TAB Gen 1 */
2053 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2054 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2055 USB_VENDOR_ID_LENOVO,
2056 USB_DEVICE_ID_LENOVO_X12_TAB) },
2057
2058 /* MosArt panels */
2059 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2060 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2061 USB_DEVICE_ID_ASUS_T91MT)},
2062 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2063 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2064 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
2065 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2066 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
2067 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
2068
2069 /* Novatek Panel */
2070 { .driver_data = MT_CLS_NSMU,
2071 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2072 USB_DEVICE_ID_NOVATEK_PCT) },
2073
2074 /* Ntrig Panel */
2075 { .driver_data = MT_CLS_NSMU,
2076 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2077 USB_VENDOR_ID_NTRIG, 0x1b05) },
2078
2079 /* Panasonic panels */
2080 { .driver_data = MT_CLS_PANASONIC,
2081 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2082 USB_DEVICE_ID_PANABOARD_UBT780) },
2083 { .driver_data = MT_CLS_PANASONIC,
2084 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2085 USB_DEVICE_ID_PANABOARD_UBT880) },
2086
2087 /* PixArt optical touch screen */
2088 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2089 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2090 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2091 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2092 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2093 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2094 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2095 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2096 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2097
2098 /* PixCir-based panels */
2099 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2100 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2101 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2102
2103 /* Quanta-based panels */
2104 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2105 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2106 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2107
2108 /* Razer touchpads */
2109 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2110 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2111 USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2112
2113 /* Smart Tech panels */
2114 { .driver_data = MT_CLS_SMART_TECH,
2115 MT_USB_DEVICE(0x0b8c, 0x0092)},
2116
2117 /* Stantum panels */
2118 { .driver_data = MT_CLS_CONFIDENCE,
2119 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2120 USB_DEVICE_ID_MTP_STM)},
2121
2122 /* Synaptics devices */
2123 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2124 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2125 USB_VENDOR_ID_SYNAPTICS, 0xce08) },
2126
2127 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2128 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2129 USB_VENDOR_ID_SYNAPTICS, 0xce09) },
2130
2131 /* TopSeed panels */
2132 { .driver_data = MT_CLS_TOPSEED,
2133 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2134 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2135
2136 /* Touch International panels */
2137 { .driver_data = MT_CLS_NSMU,
2138 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2139 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2140
2141 /* Unitec panels */
2142 { .driver_data = MT_CLS_NSMU,
2143 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2144 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2145 { .driver_data = MT_CLS_NSMU,
2146 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2147 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2148
2149 /* VTL panels */
2150 { .driver_data = MT_CLS_VTL,
2151 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2152 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2153
2154 /* Winbond Electronics Corp. */
2155 { .driver_data = MT_CLS_WIN_8_NO_STICKY_FINGERS,
2156 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2157 USB_VENDOR_ID_WINBOND, USB_DEVICE_ID_TSTP_MTOUCH) },
2158
2159 /* Wistron panels */
2160 { .driver_data = MT_CLS_NSMU,
2161 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2162 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2163
2164 /* XAT */
2165 { .driver_data = MT_CLS_NSMU,
2166 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2167 USB_DEVICE_ID_XAT_CSR) },
2168
2169 /* Xiroku */
2170 { .driver_data = MT_CLS_NSMU,
2171 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2172 USB_DEVICE_ID_XIROKU_SPX) },
2173 { .driver_data = MT_CLS_NSMU,
2174 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2175 USB_DEVICE_ID_XIROKU_MPX) },
2176 { .driver_data = MT_CLS_NSMU,
2177 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2178 USB_DEVICE_ID_XIROKU_CSR) },
2179 { .driver_data = MT_CLS_NSMU,
2180 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2181 USB_DEVICE_ID_XIROKU_SPX1) },
2182 { .driver_data = MT_CLS_NSMU,
2183 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2184 USB_DEVICE_ID_XIROKU_MPX1) },
2185 { .driver_data = MT_CLS_NSMU,
2186 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2187 USB_DEVICE_ID_XIROKU_CSR1) },
2188 { .driver_data = MT_CLS_NSMU,
2189 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2190 USB_DEVICE_ID_XIROKU_SPX2) },
2191 { .driver_data = MT_CLS_NSMU,
2192 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2193 USB_DEVICE_ID_XIROKU_MPX2) },
2194 { .driver_data = MT_CLS_NSMU,
2195 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2196 USB_DEVICE_ID_XIROKU_CSR2) },
2197
2198 /* Google MT devices */
2199 { .driver_data = MT_CLS_GOOGLE,
2200 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2201 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2202 { .driver_data = MT_CLS_GOOGLE,
2203 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_GOOGLE,
2204 USB_DEVICE_ID_GOOGLE_WHISKERS) },
2205
2206 /* Generic MT device */
2207 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2208
2209 /* Generic Win 8 certified MT device */
2210 { .driver_data = MT_CLS_WIN_8,
2211 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2212 HID_ANY_ID, HID_ANY_ID) },
2213 { }
2214 };
2215 MODULE_DEVICE_TABLE(hid, mt_devices);
2216
2217 static const struct hid_usage_id mt_grabbed_usages[] = {
2218 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2219 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2220 };
2221
2222 static struct hid_driver mt_driver = {
2223 .name = "hid-multitouch",
2224 .id_table = mt_devices,
2225 .probe = mt_probe,
2226 .remove = mt_remove,
2227 .input_mapping = mt_input_mapping,
2228 .input_mapped = mt_input_mapped,
2229 .input_configured = mt_input_configured,
2230 .feature_mapping = mt_feature_mapping,
2231 .usage_table = mt_grabbed_usages,
2232 .event = mt_event,
2233 .report = mt_report,
2234 #ifdef CONFIG_PM
2235 .suspend = mt_suspend,
2236 .reset_resume = mt_reset_resume,
2237 .resume = mt_resume,
2238 #endif
2239 };
2240 module_hid_driver(mt_driver);
2241