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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
44MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
45MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
46MODULE_DESCRIPTION("HID multitouch panels");
47MODULE_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
73#define MT_INPUTMODE_TOUCHSCREEN 0x02
74#define MT_INPUTMODE_TOUCHPAD 0x03
75
76#define MT_BUTTONTYPE_CLICKPAD 0
77
78enum latency_mode {
79 HID_LATENCY_NORMAL = 0,
80 HID_LATENCY_HIGH = 1,
81};
82
83#define MT_IO_FLAGS_RUNNING 0
84#define MT_IO_FLAGS_ACTIVE_SLOTS 1
85#define MT_IO_FLAGS_PENDING_SLOTS 2
86
87static const bool mtrue = true; /* default for true */
88static const bool mfalse; /* default for false */
89static const __s32 mzero; /* default for 0 */
90
91#define DEFAULT_TRUE ((void *)&mtrue)
92#define DEFAULT_FALSE ((void *)&mfalse)
93#define DEFAULT_ZERO ((void *)&mzero)
94
95struct mt_usages {
96 struct list_head list;
97 __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
98 __s32 *contactid; /* the device ContactID assigned to this slot */
99 bool *tip_state; /* is the touch valid? */
100 bool *inrange_state; /* is the finger in proximity of the sensor? */
101 bool *confidence_state; /* is the touch made by a finger? */
102};
103
104struct mt_application {
105 struct list_head list;
106 unsigned int application;
107 unsigned int report_id;
108 struct list_head mt_usages; /* mt usages list */
109
110 __s32 quirks;
111
112 __s32 *scantime; /* scantime reported */
113 __s32 scantime_logical_max; /* max value for raw scantime */
114
115 __s32 *raw_cc; /* contact count in the report */
116 int left_button_state; /* left button state */
117 unsigned int mt_flags; /* flags to pass to input-mt */
118
119 unsigned long *pending_palm_slots; /* slots where we reported palm
120 * and need to release */
121
122 __u8 num_received; /* how many contacts we received */
123 __u8 num_expected; /* expected last contact index */
124 __u8 buttons_count; /* number of physical buttons per touchpad */
125 __u8 touches_by_report; /* how many touches are present in one report:
126 * 1 means we should use a serial protocol
127 * > 1 means hybrid (multitouch) protocol
128 */
129
130 __s32 dev_time; /* the scan time provided by the device */
131 unsigned long jiffies; /* the frame's jiffies */
132 int timestamp; /* the timestamp to be sent */
133 int prev_scantime; /* scantime reported previously */
134
135 bool have_contact_count;
136};
137
138struct mt_class {
139 __s32 name; /* MT_CLS */
140 __s32 quirks;
141 __s32 sn_move; /* Signal/noise ratio for move events */
142 __s32 sn_width; /* Signal/noise ratio for width events */
143 __s32 sn_height; /* Signal/noise ratio for height events */
144 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
145 __u8 maxcontacts;
146 bool is_indirect; /* true for touchpads */
147 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
148};
149
150struct mt_report_data {
151 struct list_head list;
152 struct hid_report *report;
153 struct mt_application *application;
154 bool is_mt_collection;
155};
156
157struct mt_device {
158 struct mt_class mtclass; /* our mt device class */
159 struct timer_list release_timer; /* to release sticky fingers */
160 struct hid_device *hdev; /* hid_device we're attached to */
161 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
162 __u8 inputmode_value; /* InputMode HID feature value */
163 __u8 maxcontacts;
164 bool is_buttonpad; /* is this device a button pad? */
165 bool serial_maybe; /* need to check for serial protocol */
166
167 struct list_head applications;
168 struct list_head reports;
169};
170
171static void mt_post_parse_default_settings(struct mt_device *td,
172 struct mt_application *app);
173static void mt_post_parse(struct mt_device *td, struct mt_application *app);
174
175/* classes of device behavior */
176#define MT_CLS_DEFAULT 0x0001
177
178#define MT_CLS_SERIAL 0x0002
179#define MT_CLS_CONFIDENCE 0x0003
180#define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
181#define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
182#define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
183#define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
184/* reserved 0x0008 */
185#define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
186#define MT_CLS_NSMU 0x000a
187/* reserved 0x0010 */
188/* reserved 0x0011 */
189#define MT_CLS_WIN_8 0x0012
190#define MT_CLS_EXPORT_ALL_INPUTS 0x0013
191#define MT_CLS_WIN_8_DUAL 0x0014
192
193/* vendor specific classes */
194#define MT_CLS_3M 0x0101
195/* reserved 0x0102 */
196#define MT_CLS_EGALAX 0x0103
197#define MT_CLS_EGALAX_SERIAL 0x0104
198#define MT_CLS_TOPSEED 0x0105
199#define MT_CLS_PANASONIC 0x0106
200#define MT_CLS_FLATFROG 0x0107
201#define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
202#define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
203#define MT_CLS_LG 0x010a
204#define MT_CLS_ASUS 0x010b
205#define MT_CLS_VTL 0x0110
206#define MT_CLS_GOOGLE 0x0111
207#define MT_CLS_RAZER_BLADE_STEALTH 0x0112
208#define MT_CLS_SMART_TECH 0x0113
209
210#define MT_DEFAULT_MAXCONTACT 10
211#define MT_MAX_MAXCONTACT 250
212
213/*
214 * Resync device and local timestamps after that many microseconds without
215 * receiving data.
216 */
217#define MAX_TIMESTAMP_INTERVAL 1000000
218
219#define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
220#define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
221
222/*
223 * these device-dependent functions determine what slot corresponds
224 * to a valid contact that was just read.
225 */
226
227static int cypress_compute_slot(struct mt_application *application,
228 struct mt_usages *slot)
229{
230 if (*slot->contactid != 0 || application->num_received == 0)
231 return *slot->contactid;
232 else
233 return -1;
234}
235
236static const struct mt_class mt_classes[] = {
237 { .name = MT_CLS_DEFAULT,
238 .quirks = MT_QUIRK_ALWAYS_VALID |
239 MT_QUIRK_CONTACT_CNT_ACCURATE },
240 { .name = MT_CLS_NSMU,
241 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
242 { .name = MT_CLS_SERIAL,
243 .quirks = MT_QUIRK_ALWAYS_VALID},
244 { .name = MT_CLS_CONFIDENCE,
245 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
246 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
247 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
248 MT_QUIRK_SLOT_IS_CONTACTID },
249 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
250 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
251 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
252 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
253 .quirks = MT_QUIRK_VALID_IS_INRANGE |
254 MT_QUIRK_SLOT_IS_CONTACTID,
255 .maxcontacts = 2 },
256 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
257 .quirks = MT_QUIRK_VALID_IS_INRANGE |
258 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
259 .maxcontacts = 2 },
260 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
261 .quirks = MT_QUIRK_VALID_IS_INRANGE |
262 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
263 { .name = MT_CLS_WIN_8,
264 .quirks = MT_QUIRK_ALWAYS_VALID |
265 MT_QUIRK_IGNORE_DUPLICATES |
266 MT_QUIRK_HOVERING |
267 MT_QUIRK_CONTACT_CNT_ACCURATE |
268 MT_QUIRK_STICKY_FINGERS |
269 MT_QUIRK_WIN8_PTP_BUTTONS,
270 .export_all_inputs = true },
271 { .name = MT_CLS_EXPORT_ALL_INPUTS,
272 .quirks = MT_QUIRK_ALWAYS_VALID |
273 MT_QUIRK_CONTACT_CNT_ACCURATE,
274 .export_all_inputs = true },
275 { .name = MT_CLS_WIN_8_DUAL,
276 .quirks = MT_QUIRK_ALWAYS_VALID |
277 MT_QUIRK_IGNORE_DUPLICATES |
278 MT_QUIRK_HOVERING |
279 MT_QUIRK_CONTACT_CNT_ACCURATE |
280 MT_QUIRK_WIN8_PTP_BUTTONS,
281 .export_all_inputs = true },
282
283 /*
284 * vendor specific classes
285 */
286 { .name = MT_CLS_3M,
287 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
288 MT_QUIRK_SLOT_IS_CONTACTID |
289 MT_QUIRK_TOUCH_SIZE_SCALING,
290 .sn_move = 2048,
291 .sn_width = 128,
292 .sn_height = 128,
293 .maxcontacts = 60,
294 },
295 { .name = MT_CLS_EGALAX,
296 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
297 MT_QUIRK_VALID_IS_INRANGE,
298 .sn_move = 4096,
299 .sn_pressure = 32,
300 },
301 { .name = MT_CLS_EGALAX_SERIAL,
302 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
303 MT_QUIRK_ALWAYS_VALID,
304 .sn_move = 4096,
305 .sn_pressure = 32,
306 },
307 { .name = MT_CLS_TOPSEED,
308 .quirks = MT_QUIRK_ALWAYS_VALID,
309 .is_indirect = true,
310 .maxcontacts = 2,
311 },
312 { .name = MT_CLS_PANASONIC,
313 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
314 .maxcontacts = 4 },
315 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
316 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
317 MT_QUIRK_VALID_IS_INRANGE |
318 MT_QUIRK_SLOT_IS_CONTACTID,
319 .maxcontacts = 2
320 },
321 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
322 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
323 MT_QUIRK_SLOT_IS_CONTACTID
324 },
325
326 { .name = MT_CLS_FLATFROG,
327 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
328 MT_QUIRK_NO_AREA,
329 .sn_move = 2048,
330 .maxcontacts = 40,
331 },
332 { .name = MT_CLS_LG,
333 .quirks = MT_QUIRK_ALWAYS_VALID |
334 MT_QUIRK_FIX_CONST_CONTACT_ID |
335 MT_QUIRK_IGNORE_DUPLICATES |
336 MT_QUIRK_HOVERING |
337 MT_QUIRK_CONTACT_CNT_ACCURATE },
338 { .name = MT_CLS_ASUS,
339 .quirks = MT_QUIRK_ALWAYS_VALID |
340 MT_QUIRK_CONTACT_CNT_ACCURATE |
341 MT_QUIRK_ASUS_CUSTOM_UP },
342 { .name = MT_CLS_VTL,
343 .quirks = MT_QUIRK_ALWAYS_VALID |
344 MT_QUIRK_CONTACT_CNT_ACCURATE |
345 MT_QUIRK_FORCE_GET_FEATURE,
346 },
347 { .name = MT_CLS_GOOGLE,
348 .quirks = MT_QUIRK_ALWAYS_VALID |
349 MT_QUIRK_CONTACT_CNT_ACCURATE |
350 MT_QUIRK_SLOT_IS_CONTACTID |
351 MT_QUIRK_HOVERING
352 },
353 { .name = MT_CLS_RAZER_BLADE_STEALTH,
354 .quirks = MT_QUIRK_ALWAYS_VALID |
355 MT_QUIRK_IGNORE_DUPLICATES |
356 MT_QUIRK_HOVERING |
357 MT_QUIRK_CONTACT_CNT_ACCURATE |
358 MT_QUIRK_WIN8_PTP_BUTTONS,
359 },
360 { .name = MT_CLS_SMART_TECH,
361 .quirks = MT_QUIRK_ALWAYS_VALID |
362 MT_QUIRK_IGNORE_DUPLICATES |
363 MT_QUIRK_CONTACT_CNT_ACCURATE |
364 MT_QUIRK_SEPARATE_APP_REPORT,
365 },
366 { }
367};
368
369static ssize_t mt_show_quirks(struct device *dev,
370 struct device_attribute *attr,
371 char *buf)
372{
373 struct hid_device *hdev = to_hid_device(dev);
374 struct mt_device *td = hid_get_drvdata(hdev);
375
376 return sprintf(buf, "%u\n", td->mtclass.quirks);
377}
378
379static ssize_t mt_set_quirks(struct device *dev,
380 struct device_attribute *attr,
381 const char *buf, size_t count)
382{
383 struct hid_device *hdev = to_hid_device(dev);
384 struct mt_device *td = hid_get_drvdata(hdev);
385 struct mt_application *application;
386
387 unsigned long val;
388
389 if (kstrtoul(buf, 0, &val))
390 return -EINVAL;
391
392 td->mtclass.quirks = val;
393
394 list_for_each_entry(application, &td->applications, list) {
395 application->quirks = val;
396 if (!application->have_contact_count)
397 application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
398 }
399
400 return count;
401}
402
403static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
404
405static struct attribute *sysfs_attrs[] = {
406 &dev_attr_quirks.attr,
407 NULL
408};
409
410static const struct attribute_group mt_attribute_group = {
411 .attrs = sysfs_attrs
412};
413
414static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
415{
416 int ret;
417 u32 size = hid_report_len(report);
418 u8 *buf;
419
420 /*
421 * Do not fetch the feature report if the device has been explicitly
422 * marked as non-capable.
423 */
424 if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
425 return;
426
427 buf = hid_alloc_report_buf(report, GFP_KERNEL);
428 if (!buf)
429 return;
430
431 ret = hid_hw_raw_request(hdev, report->id, buf, size,
432 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
433 if (ret < 0) {
434 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
435 report->id);
436 } else {
437 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
438 size, 0);
439 if (ret)
440 dev_warn(&hdev->dev, "failed to report feature\n");
441 }
442
443 kfree(buf);
444}
445
446static void mt_feature_mapping(struct hid_device *hdev,
447 struct hid_field *field, struct hid_usage *usage)
448{
449 struct mt_device *td = hid_get_drvdata(hdev);
450
451 switch (usage->hid) {
452 case HID_DG_CONTACTMAX:
453 mt_get_feature(hdev, field->report);
454
455 td->maxcontacts = field->value[0];
456 if (!td->maxcontacts &&
457 field->logical_maximum <= MT_MAX_MAXCONTACT)
458 td->maxcontacts = field->logical_maximum;
459 if (td->mtclass.maxcontacts)
460 /* check if the maxcontacts is given by the class */
461 td->maxcontacts = td->mtclass.maxcontacts;
462
463 break;
464 case HID_DG_BUTTONTYPE:
465 if (usage->usage_index >= field->report_count) {
466 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
467 break;
468 }
469
470 mt_get_feature(hdev, field->report);
471 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
472 td->is_buttonpad = true;
473
474 break;
475 case 0xff0000c5:
476 /* Retrieve the Win8 blob once to enable some devices */
477 if (usage->usage_index == 0)
478 mt_get_feature(hdev, field->report);
479 break;
480 }
481}
482
483static void set_abs(struct input_dev *input, unsigned int code,
484 struct hid_field *field, int snratio)
485{
486 int fmin = field->logical_minimum;
487 int fmax = field->logical_maximum;
488 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
489 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
490 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
491}
492
493static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
494 struct mt_application *application)
495{
496 struct mt_usages *usage;
497
498 usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
499 if (!usage)
500 return NULL;
501
502 /* set some defaults so we do not need to check for null pointers */
503 usage->x = DEFAULT_ZERO;
504 usage->y = DEFAULT_ZERO;
505 usage->cx = DEFAULT_ZERO;
506 usage->cy = DEFAULT_ZERO;
507 usage->p = DEFAULT_ZERO;
508 usage->w = DEFAULT_ZERO;
509 usage->h = DEFAULT_ZERO;
510 usage->a = DEFAULT_ZERO;
511 usage->contactid = DEFAULT_ZERO;
512 usage->tip_state = DEFAULT_FALSE;
513 usage->inrange_state = DEFAULT_FALSE;
514 usage->confidence_state = DEFAULT_TRUE;
515
516 list_add_tail(&usage->list, &application->mt_usages);
517
518 return usage;
519}
520
521static struct mt_application *mt_allocate_application(struct mt_device *td,
522 struct hid_report *report)
523{
524 unsigned int application = report->application;
525 struct mt_application *mt_application;
526
527 mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
528 GFP_KERNEL);
529 if (!mt_application)
530 return NULL;
531
532 mt_application->application = application;
533 INIT_LIST_HEAD(&mt_application->mt_usages);
534
535 if (application == HID_DG_TOUCHSCREEN)
536 mt_application->mt_flags |= INPUT_MT_DIRECT;
537
538 /*
539 * Model touchscreens providing buttons as touchpads.
540 */
541 if (application == HID_DG_TOUCHPAD) {
542 mt_application->mt_flags |= INPUT_MT_POINTER;
543 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
544 }
545
546 mt_application->scantime = DEFAULT_ZERO;
547 mt_application->raw_cc = DEFAULT_ZERO;
548 mt_application->quirks = td->mtclass.quirks;
549 mt_application->report_id = report->id;
550
551 list_add_tail(&mt_application->list, &td->applications);
552
553 return mt_application;
554}
555
556static struct mt_application *mt_find_application(struct mt_device *td,
557 struct hid_report *report)
558{
559 unsigned int application = report->application;
560 struct mt_application *tmp, *mt_application = NULL;
561
562 list_for_each_entry(tmp, &td->applications, list) {
563 if (application == tmp->application) {
564 if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
565 tmp->report_id == report->id) {
566 mt_application = tmp;
567 break;
568 }
569 }
570 }
571
572 if (!mt_application)
573 mt_application = mt_allocate_application(td, report);
574
575 return mt_application;
576}
577
578static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
579 struct hid_report *report)
580{
581 struct mt_report_data *rdata;
582 struct hid_field *field;
583 int r, n;
584
585 rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
586 if (!rdata)
587 return NULL;
588
589 rdata->report = report;
590 rdata->application = mt_find_application(td, report);
591
592 if (!rdata->application) {
593 devm_kfree(&td->hdev->dev, rdata);
594 return NULL;
595 }
596
597 for (r = 0; r < report->maxfield; r++) {
598 field = report->field[r];
599
600 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
601 continue;
602
603 for (n = 0; n < field->report_count; n++) {
604 if (field->usage[n].hid == HID_DG_CONTACTID)
605 rdata->is_mt_collection = true;
606 }
607 }
608
609 list_add_tail(&rdata->list, &td->reports);
610
611 return rdata;
612}
613
614static struct mt_report_data *mt_find_report_data(struct mt_device *td,
615 struct hid_report *report)
616{
617 struct mt_report_data *tmp, *rdata = NULL;
618
619 list_for_each_entry(tmp, &td->reports, list) {
620 if (report == tmp->report) {
621 rdata = tmp;
622 break;
623 }
624 }
625
626 if (!rdata)
627 rdata = mt_allocate_report_data(td, report);
628
629 return rdata;
630}
631
632static void mt_store_field(struct hid_device *hdev,
633 struct mt_application *application,
634 __s32 *value,
635 size_t offset)
636{
637 struct mt_usages *usage;
638 __s32 **target;
639
640 if (list_empty(&application->mt_usages))
641 usage = mt_allocate_usage(hdev, application);
642 else
643 usage = list_last_entry(&application->mt_usages,
644 struct mt_usages,
645 list);
646
647 if (!usage)
648 return;
649
650 target = (__s32 **)((char *)usage + offset);
651
652 /* the value has already been filled, create a new slot */
653 if (*target != DEFAULT_TRUE &&
654 *target != DEFAULT_FALSE &&
655 *target != DEFAULT_ZERO) {
656 if (usage->contactid == DEFAULT_ZERO ||
657 usage->x == DEFAULT_ZERO ||
658 usage->y == DEFAULT_ZERO) {
659 hid_dbg(hdev,
660 "ignoring duplicate usage on incomplete");
661 return;
662 }
663 usage = mt_allocate_usage(hdev, application);
664 if (!usage)
665 return;
666
667 target = (__s32 **)((char *)usage + offset);
668 }
669
670 *target = value;
671}
672
673#define MT_STORE_FIELD(__name) \
674 mt_store_field(hdev, app, \
675 &field->value[usage->usage_index], \
676 offsetof(struct mt_usages, __name))
677
678static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
679 struct hid_field *field, struct hid_usage *usage,
680 unsigned long **bit, int *max, struct mt_application *app)
681{
682 struct mt_device *td = hid_get_drvdata(hdev);
683 struct mt_class *cls = &td->mtclass;
684 int code;
685 struct hid_usage *prev_usage = NULL;
686
687 /*
688 * Model touchscreens providing buttons as touchpads.
689 */
690 if (field->application == HID_DG_TOUCHSCREEN &&
691 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
692 app->mt_flags |= INPUT_MT_POINTER;
693 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
694 }
695
696 /* count the buttons on touchpads */
697 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
698 app->buttons_count++;
699
700 if (usage->usage_index)
701 prev_usage = &field->usage[usage->usage_index - 1];
702
703 switch (usage->hid & HID_USAGE_PAGE) {
704
705 case HID_UP_GENDESK:
706 switch (usage->hid) {
707 case HID_GD_X:
708 if (prev_usage && (prev_usage->hid == usage->hid)) {
709 code = ABS_MT_TOOL_X;
710 MT_STORE_FIELD(cx);
711 } else {
712 code = ABS_MT_POSITION_X;
713 MT_STORE_FIELD(x);
714 }
715
716 set_abs(hi->input, code, field, cls->sn_move);
717
718 /*
719 * A system multi-axis that exports X and Y has a high
720 * chance of being used directly on a surface
721 */
722 if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
723 __set_bit(INPUT_PROP_DIRECT,
724 hi->input->propbit);
725 input_set_abs_params(hi->input,
726 ABS_MT_TOOL_TYPE,
727 MT_TOOL_DIAL,
728 MT_TOOL_DIAL, 0, 0);
729 }
730
731 return 1;
732 case HID_GD_Y:
733 if (prev_usage && (prev_usage->hid == usage->hid)) {
734 code = ABS_MT_TOOL_Y;
735 MT_STORE_FIELD(cy);
736 } else {
737 code = ABS_MT_POSITION_Y;
738 MT_STORE_FIELD(y);
739 }
740
741 set_abs(hi->input, code, field, cls->sn_move);
742
743 return 1;
744 }
745 return 0;
746
747 case HID_UP_DIGITIZER:
748 switch (usage->hid) {
749 case HID_DG_INRANGE:
750 if (app->quirks & MT_QUIRK_HOVERING) {
751 input_set_abs_params(hi->input,
752 ABS_MT_DISTANCE, 0, 1, 0, 0);
753 }
754 MT_STORE_FIELD(inrange_state);
755 return 1;
756 case HID_DG_CONFIDENCE:
757 if ((cls->name == MT_CLS_WIN_8 ||
758 cls->name == MT_CLS_WIN_8_DUAL) &&
759 (field->application == HID_DG_TOUCHPAD ||
760 field->application == HID_DG_TOUCHSCREEN))
761 app->quirks |= MT_QUIRK_CONFIDENCE;
762
763 if (app->quirks & MT_QUIRK_CONFIDENCE)
764 input_set_abs_params(hi->input,
765 ABS_MT_TOOL_TYPE,
766 MT_TOOL_FINGER,
767 MT_TOOL_PALM, 0, 0);
768
769 MT_STORE_FIELD(confidence_state);
770 return 1;
771 case HID_DG_TIPSWITCH:
772 if (field->application != HID_GD_SYSTEM_MULTIAXIS)
773 input_set_capability(hi->input,
774 EV_KEY, BTN_TOUCH);
775 MT_STORE_FIELD(tip_state);
776 return 1;
777 case HID_DG_CONTACTID:
778 MT_STORE_FIELD(contactid);
779 app->touches_by_report++;
780 return 1;
781 case HID_DG_WIDTH:
782 if (!(app->quirks & MT_QUIRK_NO_AREA))
783 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
784 cls->sn_width);
785 MT_STORE_FIELD(w);
786 return 1;
787 case HID_DG_HEIGHT:
788 if (!(app->quirks & MT_QUIRK_NO_AREA)) {
789 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
790 cls->sn_height);
791
792 /*
793 * Only set ABS_MT_ORIENTATION if it is not
794 * already set by the HID_DG_AZIMUTH usage.
795 */
796 if (!test_bit(ABS_MT_ORIENTATION,
797 hi->input->absbit))
798 input_set_abs_params(hi->input,
799 ABS_MT_ORIENTATION, 0, 1, 0, 0);
800 }
801 MT_STORE_FIELD(h);
802 return 1;
803 case HID_DG_TIPPRESSURE:
804 set_abs(hi->input, ABS_MT_PRESSURE, field,
805 cls->sn_pressure);
806 MT_STORE_FIELD(p);
807 return 1;
808 case HID_DG_SCANTIME:
809 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
810 app->scantime = &field->value[usage->usage_index];
811 app->scantime_logical_max = field->logical_maximum;
812 return 1;
813 case HID_DG_CONTACTCOUNT:
814 app->have_contact_count = true;
815 app->raw_cc = &field->value[usage->usage_index];
816 return 1;
817 case HID_DG_AZIMUTH:
818 /*
819 * Azimuth has the range of [0, MAX) representing a full
820 * revolution. Set ABS_MT_ORIENTATION to a quarter of
821 * MAX according the definition of ABS_MT_ORIENTATION
822 */
823 input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
824 -field->logical_maximum / 4,
825 field->logical_maximum / 4,
826 cls->sn_move ?
827 field->logical_maximum / cls->sn_move : 0, 0);
828 MT_STORE_FIELD(a);
829 return 1;
830 case HID_DG_CONTACTMAX:
831 /* contact max are global to the report */
832 return -1;
833 case HID_DG_TOUCH:
834 /* Legacy devices use TIPSWITCH and not TOUCH.
835 * Let's just ignore this field. */
836 return -1;
837 }
838 /* let hid-input decide for the others */
839 return 0;
840
841 case HID_UP_BUTTON:
842 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
843 /*
844 * MS PTP spec says that external buttons left and right have
845 * usages 2 and 3.
846 */
847 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
848 field->application == HID_DG_TOUCHPAD &&
849 (usage->hid & HID_USAGE) > 1)
850 code--;
851
852 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
853 code = BTN_0 + ((usage->hid - 1) & HID_USAGE);
854
855 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
856 input_set_capability(hi->input, EV_KEY, code);
857 return 1;
858
859 case 0xff000000:
860 /* we do not want to map these: no input-oriented meaning */
861 return -1;
862 }
863
864 return 0;
865}
866
867static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
868 struct mt_usages *slot,
869 struct input_dev *input)
870{
871 __s32 quirks = app->quirks;
872
873 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
874 return *slot->contactid;
875
876 if (quirks & MT_QUIRK_CYPRESS)
877 return cypress_compute_slot(app, slot);
878
879 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
880 return app->num_received;
881
882 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
883 return *slot->contactid - 1;
884
885 return input_mt_get_slot_by_key(input, *slot->contactid);
886}
887
888static void mt_release_pending_palms(struct mt_device *td,
889 struct mt_application *app,
890 struct input_dev *input)
891{
892 int slotnum;
893 bool need_sync = false;
894
895 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
896 clear_bit(slotnum, app->pending_palm_slots);
897
898 input_mt_slot(input, slotnum);
899 input_mt_report_slot_state(input, MT_TOOL_PALM, false);
900
901 need_sync = true;
902 }
903
904 if (need_sync) {
905 input_mt_sync_frame(input);
906 input_sync(input);
907 }
908}
909
910/*
911 * this function is called when a whole packet has been received and processed,
912 * so that it can decide what to send to the input layer.
913 */
914static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
915 struct input_dev *input)
916{
917 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
918 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
919
920 input_mt_sync_frame(input);
921 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
922 input_sync(input);
923
924 mt_release_pending_palms(td, app, input);
925
926 app->num_received = 0;
927 app->left_button_state = 0;
928
929 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
930 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
931 else
932 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
933 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
934}
935
936static int mt_compute_timestamp(struct mt_application *app, __s32 value)
937{
938 long delta = value - app->prev_scantime;
939 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
940
941 app->jiffies = jiffies;
942
943 if (delta < 0)
944 delta += app->scantime_logical_max;
945
946 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
947 delta *= 100;
948
949 if (jdelta > MAX_TIMESTAMP_INTERVAL)
950 /* No data received for a while, resync the timestamp. */
951 return 0;
952 else
953 return app->timestamp + delta;
954}
955
956static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
957 struct hid_usage *usage, __s32 value)
958{
959 /* we will handle the hidinput part later, now remains hiddev */
960 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
961 hid->hiddev_hid_event(hid, field, usage, value);
962
963 return 1;
964}
965
966static int mt_process_slot(struct mt_device *td, struct input_dev *input,
967 struct mt_application *app,
968 struct mt_usages *slot)
969{
970 struct input_mt *mt = input->mt;
971 __s32 quirks = app->quirks;
972 bool valid = true;
973 bool confidence_state = true;
974 bool inrange_state = false;
975 int active;
976 int slotnum;
977 int tool = MT_TOOL_FINGER;
978
979 if (!slot)
980 return -EINVAL;
981
982 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
983 app->num_received >= app->num_expected)
984 return -EAGAIN;
985
986 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
987 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
988 valid = *slot->inrange_state;
989 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
990 valid = *slot->tip_state;
991 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
992 valid = *slot->confidence_state;
993
994 if (!valid)
995 return 0;
996 }
997
998 slotnum = mt_compute_slot(td, app, slot, input);
999 if (slotnum < 0 || slotnum >= td->maxcontacts)
1000 return 0;
1001
1002 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1003 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1004
1005 if (input_mt_is_active(i_slot) &&
1006 input_mt_is_used(mt, i_slot))
1007 return -EAGAIN;
1008 }
1009
1010 if (quirks & MT_QUIRK_CONFIDENCE)
1011 confidence_state = *slot->confidence_state;
1012
1013 if (quirks & MT_QUIRK_HOVERING)
1014 inrange_state = *slot->inrange_state;
1015
1016 active = *slot->tip_state || inrange_state;
1017
1018 if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1019 tool = MT_TOOL_DIAL;
1020 else if (unlikely(!confidence_state)) {
1021 tool = MT_TOOL_PALM;
1022 if (!active &&
1023 input_mt_is_active(&mt->slots[slotnum])) {
1024 /*
1025 * The non-confidence was reported for
1026 * previously valid contact that is also no
1027 * longer valid. We can't simply report
1028 * lift-off as userspace will not be aware
1029 * of non-confidence, so we need to split
1030 * it into 2 events: active MT_TOOL_PALM
1031 * and a separate liftoff.
1032 */
1033 active = true;
1034 set_bit(slotnum, app->pending_palm_slots);
1035 }
1036 }
1037
1038 input_mt_slot(input, slotnum);
1039 input_mt_report_slot_state(input, tool, active);
1040 if (active) {
1041 /* this finger is in proximity of the sensor */
1042 int wide = (*slot->w > *slot->h);
1043 int major = max(*slot->w, *slot->h);
1044 int minor = min(*slot->w, *slot->h);
1045 int orientation = wide;
1046 int max_azimuth;
1047 int azimuth;
1048
1049 if (slot->a != DEFAULT_ZERO) {
1050 /*
1051 * Azimuth is counter-clockwise and ranges from [0, MAX)
1052 * (a full revolution). Convert it to clockwise ranging
1053 * [-MAX/2, MAX/2].
1054 *
1055 * Note that ABS_MT_ORIENTATION require us to report
1056 * the limit of [-MAX/4, MAX/4], but the value can go
1057 * out of range to [-MAX/2, MAX/2] to report an upside
1058 * down ellipsis.
1059 */
1060 azimuth = *slot->a;
1061 max_azimuth = input_abs_get_max(input,
1062 ABS_MT_ORIENTATION);
1063 if (azimuth > max_azimuth * 2)
1064 azimuth -= max_azimuth * 4;
1065 orientation = -azimuth;
1066 }
1067
1068 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1069 /*
1070 * divided by two to match visual scale of touch
1071 * for devices with this quirk
1072 */
1073 major = major >> 1;
1074 minor = minor >> 1;
1075 }
1076
1077 input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
1078 input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
1079 input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
1080 input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy);
1081 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1082 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1083 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1084 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1085 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1086
1087 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1088 }
1089
1090 return 0;
1091}
1092
1093static void mt_process_mt_event(struct hid_device *hid,
1094 struct mt_application *app,
1095 struct hid_field *field,
1096 struct hid_usage *usage,
1097 __s32 value,
1098 bool first_packet)
1099{
1100 __s32 quirks = app->quirks;
1101 struct input_dev *input = field->hidinput->input;
1102
1103 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1104 return;
1105
1106 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1107
1108 /*
1109 * For Win8 PTP touchpads we should only look at
1110 * non finger/touch events in the first_packet of a
1111 * (possible) multi-packet frame.
1112 */
1113 if (!first_packet)
1114 return;
1115
1116 /*
1117 * For Win8 PTP touchpads we map both the clickpad click
1118 * and any "external" left buttons to BTN_LEFT if a
1119 * device claims to have both we need to report 1 for
1120 * BTN_LEFT if either is pressed, so we or all values
1121 * together and report the result in mt_sync_frame().
1122 */
1123 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1124 app->left_button_state |= value;
1125 return;
1126 }
1127 }
1128
1129 input_event(input, usage->type, usage->code, value);
1130}
1131
1132static void mt_touch_report(struct hid_device *hid,
1133 struct mt_report_data *rdata)
1134{
1135 struct mt_device *td = hid_get_drvdata(hid);
1136 struct hid_report *report = rdata->report;
1137 struct mt_application *app = rdata->application;
1138 struct hid_field *field;
1139 struct input_dev *input;
1140 struct mt_usages *slot;
1141 bool first_packet;
1142 unsigned count;
1143 int r, n;
1144 int scantime = 0;
1145 int contact_count = -1;
1146
1147 /* sticky fingers release in progress, abort */
1148 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1149 return;
1150
1151 scantime = *app->scantime;
1152 app->timestamp = mt_compute_timestamp(app, scantime);
1153 if (app->raw_cc != DEFAULT_ZERO)
1154 contact_count = *app->raw_cc;
1155
1156 /*
1157 * Includes multi-packet support where subsequent
1158 * packets are sent with zero contactcount.
1159 */
1160 if (contact_count >= 0) {
1161 /*
1162 * For Win8 PTPs the first packet (td->num_received == 0) may
1163 * have a contactcount of 0 if there only is a button event.
1164 * We double check that this is not a continuation packet
1165 * of a possible multi-packet frame be checking that the
1166 * timestamp has changed.
1167 */
1168 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1169 app->num_received == 0 &&
1170 app->prev_scantime != scantime)
1171 app->num_expected = contact_count;
1172 /* A non 0 contact count always indicates a first packet */
1173 else if (contact_count)
1174 app->num_expected = contact_count;
1175 }
1176 app->prev_scantime = scantime;
1177
1178 first_packet = app->num_received == 0;
1179
1180 input = report->field[0]->hidinput->input;
1181
1182 list_for_each_entry(slot, &app->mt_usages, list) {
1183 if (!mt_process_slot(td, input, app, slot))
1184 app->num_received++;
1185 }
1186
1187 for (r = 0; r < report->maxfield; r++) {
1188 field = report->field[r];
1189 count = field->report_count;
1190
1191 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1192 continue;
1193
1194 for (n = 0; n < count; n++)
1195 mt_process_mt_event(hid, app, field,
1196 &field->usage[n], field->value[n],
1197 first_packet);
1198 }
1199
1200 if (app->num_received >= app->num_expected)
1201 mt_sync_frame(td, app, input);
1202
1203 /*
1204 * Windows 8 specs says 2 things:
1205 * - once a contact has been reported, it has to be reported in each
1206 * subsequent report
1207 * - the report rate when fingers are present has to be at least
1208 * the refresh rate of the screen, 60 or 120 Hz
1209 *
1210 * I interprete this that the specification forces a report rate of
1211 * at least 60 Hz for a touchscreen to be certified.
1212 * Which means that if we do not get a report whithin 16 ms, either
1213 * something wrong happens, either the touchscreen forgets to send
1214 * a release. Taking a reasonable margin allows to remove issues
1215 * with USB communication or the load of the machine.
1216 *
1217 * Given that Win 8 devices are forced to send a release, this will
1218 * only affect laggish machines and the ones that have a firmware
1219 * defect.
1220 */
1221 if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1222 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1223 mod_timer(&td->release_timer,
1224 jiffies + msecs_to_jiffies(100));
1225 else
1226 del_timer(&td->release_timer);
1227 }
1228
1229 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1230}
1231
1232static int mt_touch_input_configured(struct hid_device *hdev,
1233 struct hid_input *hi,
1234 struct mt_application *app)
1235{
1236 struct mt_device *td = hid_get_drvdata(hdev);
1237 struct mt_class *cls = &td->mtclass;
1238 struct input_dev *input = hi->input;
1239 int ret;
1240
1241 if (!td->maxcontacts)
1242 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1243
1244 mt_post_parse(td, app);
1245 if (td->serial_maybe)
1246 mt_post_parse_default_settings(td, app);
1247
1248 if (cls->is_indirect)
1249 app->mt_flags |= INPUT_MT_POINTER;
1250
1251 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1252 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1253
1254 /* check for clickpads */
1255 if ((app->mt_flags & INPUT_MT_POINTER) &&
1256 (app->buttons_count == 1))
1257 td->is_buttonpad = true;
1258
1259 if (td->is_buttonpad)
1260 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1261
1262 app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1263 BITS_TO_LONGS(td->maxcontacts),
1264 sizeof(long),
1265 GFP_KERNEL);
1266 if (!app->pending_palm_slots)
1267 return -ENOMEM;
1268
1269 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1270 if (ret)
1271 return ret;
1272
1273 app->mt_flags = 0;
1274 return 0;
1275}
1276
1277#define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1278 max, EV_KEY, (c))
1279static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1280 struct hid_field *field, struct hid_usage *usage,
1281 unsigned long **bit, int *max)
1282{
1283 struct mt_device *td = hid_get_drvdata(hdev);
1284 struct mt_application *application;
1285 struct mt_report_data *rdata;
1286
1287 rdata = mt_find_report_data(td, field->report);
1288 if (!rdata) {
1289 hid_err(hdev, "failed to allocate data for report\n");
1290 return 0;
1291 }
1292
1293 application = rdata->application;
1294
1295 /*
1296 * If mtclass.export_all_inputs is not set, only map fields from
1297 * TouchScreen or TouchPad collections. We need to ignore fields
1298 * that belong to other collections such as Mouse that might have
1299 * the same GenericDesktop usages.
1300 */
1301 if (!td->mtclass.export_all_inputs &&
1302 field->application != HID_DG_TOUCHSCREEN &&
1303 field->application != HID_DG_PEN &&
1304 field->application != HID_DG_TOUCHPAD &&
1305 field->application != HID_GD_KEYBOARD &&
1306 field->application != HID_GD_SYSTEM_CONTROL &&
1307 field->application != HID_CP_CONSUMER_CONTROL &&
1308 field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1309 field->application != HID_GD_SYSTEM_MULTIAXIS &&
1310 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1311 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1312 return -1;
1313
1314 /*
1315 * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1316 * touchpad report descriptor. We need to treat these as an array to
1317 * map usages to input keys.
1318 */
1319 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1320 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1321 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1322 set_bit(EV_REP, hi->input->evbit);
1323 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1324 field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1325 switch (usage->hid & HID_USAGE) {
1326 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
1327 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
1328 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
1329 case 0x6b: mt_map_key_clear(KEY_F21); break;
1330 case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
1331 default:
1332 return -1;
1333 }
1334 return 1;
1335 }
1336
1337 if (rdata->is_mt_collection)
1338 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1339 application);
1340
1341 /*
1342 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1343 * for the stylus. Overwrite the hid_input application
1344 */
1345 if (field->physical == HID_DG_STYLUS)
1346 hi->application = HID_DG_STYLUS;
1347
1348 /* let hid-core decide for the others */
1349 return 0;
1350}
1351
1352static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1353 struct hid_field *field, struct hid_usage *usage,
1354 unsigned long **bit, int *max)
1355{
1356 struct mt_device *td = hid_get_drvdata(hdev);
1357 struct mt_report_data *rdata;
1358
1359 rdata = mt_find_report_data(td, field->report);
1360 if (rdata && rdata->is_mt_collection) {
1361 /* We own these mappings, tell hid-input to ignore them */
1362 return -1;
1363 }
1364
1365 /* let hid-core decide for the others */
1366 return 0;
1367}
1368
1369static int mt_event(struct hid_device *hid, struct hid_field *field,
1370 struct hid_usage *usage, __s32 value)
1371{
1372 struct mt_device *td = hid_get_drvdata(hid);
1373 struct mt_report_data *rdata;
1374
1375 rdata = mt_find_report_data(td, field->report);
1376 if (rdata && rdata->is_mt_collection)
1377 return mt_touch_event(hid, field, usage, value);
1378
1379 return 0;
1380}
1381
1382static void mt_report(struct hid_device *hid, struct hid_report *report)
1383{
1384 struct mt_device *td = hid_get_drvdata(hid);
1385 struct hid_field *field = report->field[0];
1386 struct mt_report_data *rdata;
1387
1388 if (!(hid->claimed & HID_CLAIMED_INPUT))
1389 return;
1390
1391 rdata = mt_find_report_data(td, report);
1392 if (rdata && rdata->is_mt_collection)
1393 return mt_touch_report(hid, rdata);
1394
1395 if (field && field->hidinput && field->hidinput->input)
1396 input_sync(field->hidinput->input);
1397}
1398
1399static bool mt_need_to_apply_feature(struct hid_device *hdev,
1400 struct hid_field *field,
1401 struct hid_usage *usage,
1402 enum latency_mode latency,
1403 bool surface_switch,
1404 bool button_switch,
1405 bool *inputmode_found)
1406{
1407 struct mt_device *td = hid_get_drvdata(hdev);
1408 struct mt_class *cls = &td->mtclass;
1409 struct hid_report *report = field->report;
1410 unsigned int index = usage->usage_index;
1411 char *buf;
1412 u32 report_len;
1413 int max;
1414
1415 switch (usage->hid) {
1416 case HID_DG_INPUTMODE:
1417 /*
1418 * Some elan panels wrongly declare 2 input mode features,
1419 * and silently ignore when we set the value in the second
1420 * field. Skip the second feature and hope for the best.
1421 */
1422 if (*inputmode_found)
1423 return false;
1424
1425 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1426 report_len = hid_report_len(report);
1427 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1428 if (!buf) {
1429 hid_err(hdev,
1430 "failed to allocate buffer for report\n");
1431 return false;
1432 }
1433 hid_hw_raw_request(hdev, report->id, buf, report_len,
1434 HID_FEATURE_REPORT,
1435 HID_REQ_GET_REPORT);
1436 kfree(buf);
1437 }
1438
1439 field->value[index] = td->inputmode_value;
1440 *inputmode_found = true;
1441 return true;
1442
1443 case HID_DG_CONTACTMAX:
1444 if (cls->maxcontacts) {
1445 max = min_t(int, field->logical_maximum,
1446 cls->maxcontacts);
1447 if (field->value[index] != max) {
1448 field->value[index] = max;
1449 return true;
1450 }
1451 }
1452 break;
1453
1454 case HID_DG_LATENCYMODE:
1455 field->value[index] = latency;
1456 return true;
1457
1458 case HID_DG_SURFACESWITCH:
1459 field->value[index] = surface_switch;
1460 return true;
1461
1462 case HID_DG_BUTTONSWITCH:
1463 field->value[index] = button_switch;
1464 return true;
1465 }
1466
1467 return false; /* no need to update the report */
1468}
1469
1470static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1471 bool surface_switch, bool button_switch)
1472{
1473 struct hid_report_enum *rep_enum;
1474 struct hid_report *rep;
1475 struct hid_usage *usage;
1476 int i, j;
1477 bool update_report;
1478 bool inputmode_found = false;
1479
1480 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1481 list_for_each_entry(rep, &rep_enum->report_list, list) {
1482 update_report = false;
1483
1484 for (i = 0; i < rep->maxfield; i++) {
1485 /* Ignore if report count is out of bounds. */
1486 if (rep->field[i]->report_count < 1)
1487 continue;
1488
1489 for (j = 0; j < rep->field[i]->maxusage; j++) {
1490 usage = &rep->field[i]->usage[j];
1491
1492 if (mt_need_to_apply_feature(hdev,
1493 rep->field[i],
1494 usage,
1495 latency,
1496 surface_switch,
1497 button_switch,
1498 &inputmode_found))
1499 update_report = true;
1500 }
1501 }
1502
1503 if (update_report)
1504 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1505 }
1506}
1507
1508static void mt_post_parse_default_settings(struct mt_device *td,
1509 struct mt_application *app)
1510{
1511 __s32 quirks = app->quirks;
1512
1513 /* unknown serial device needs special quirks */
1514 if (list_is_singular(&app->mt_usages)) {
1515 quirks |= MT_QUIRK_ALWAYS_VALID;
1516 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1517 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1518 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1519 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1520 }
1521
1522 app->quirks = quirks;
1523}
1524
1525static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1526{
1527 if (!app->have_contact_count)
1528 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1529}
1530
1531static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1532{
1533 struct mt_device *td = hid_get_drvdata(hdev);
1534 char *name;
1535 const char *suffix = NULL;
1536 struct mt_report_data *rdata;
1537 struct mt_application *mt_application = NULL;
1538 struct hid_report *report;
1539 int ret;
1540
1541 list_for_each_entry(report, &hi->reports, hidinput_list) {
1542 rdata = mt_find_report_data(td, report);
1543 if (!rdata) {
1544 hid_err(hdev, "failed to allocate data for report\n");
1545 return -ENOMEM;
1546 }
1547
1548 mt_application = rdata->application;
1549
1550 if (rdata->is_mt_collection) {
1551 ret = mt_touch_input_configured(hdev, hi,
1552 mt_application);
1553 if (ret)
1554 return ret;
1555 }
1556 }
1557
1558 switch (hi->application) {
1559 case HID_GD_KEYBOARD:
1560 case HID_GD_KEYPAD:
1561 case HID_GD_MOUSE:
1562 case HID_DG_TOUCHPAD:
1563 case HID_GD_SYSTEM_CONTROL:
1564 case HID_CP_CONSUMER_CONTROL:
1565 case HID_GD_WIRELESS_RADIO_CTLS:
1566 case HID_GD_SYSTEM_MULTIAXIS:
1567 /* already handled by hid core */
1568 break;
1569 case HID_DG_TOUCHSCREEN:
1570 /* we do not set suffix = "Touchscreen" */
1571 hi->input->name = hdev->name;
1572 break;
1573 case HID_DG_STYLUS:
1574 /* force BTN_STYLUS to allow tablet matching in udev */
1575 __set_bit(BTN_STYLUS, hi->input->keybit);
1576 break;
1577 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1578 suffix = "Custom Media Keys";
1579 break;
1580 case HID_DG_PEN:
1581 suffix = "Stylus";
1582 break;
1583 default:
1584 suffix = "UNKNOWN";
1585 break;
1586 }
1587
1588 if (suffix) {
1589 name = devm_kzalloc(&hi->input->dev,
1590 strlen(hdev->name) + strlen(suffix) + 2,
1591 GFP_KERNEL);
1592 if (name) {
1593 sprintf(name, "%s %s", hdev->name, suffix);
1594 hi->input->name = name;
1595 }
1596 }
1597
1598 return 0;
1599}
1600
1601static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1602{
1603 if (field->usage[0].hid != usage ||
1604 !(field->flags & HID_MAIN_ITEM_CONSTANT))
1605 return;
1606
1607 field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1608 field->flags |= HID_MAIN_ITEM_VARIABLE;
1609}
1610
1611static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1612{
1613 struct hid_report *report;
1614 int i;
1615
1616 list_for_each_entry(report,
1617 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1618 list) {
1619
1620 if (!report->maxfield)
1621 continue;
1622
1623 for (i = 0; i < report->maxfield; i++)
1624 if (report->field[i]->maxusage >= 1)
1625 mt_fix_const_field(report->field[i], usage);
1626 }
1627}
1628
1629static void mt_release_contacts(struct hid_device *hid)
1630{
1631 struct hid_input *hidinput;
1632 struct mt_application *application;
1633 struct mt_device *td = hid_get_drvdata(hid);
1634
1635 list_for_each_entry(hidinput, &hid->inputs, list) {
1636 struct input_dev *input_dev = hidinput->input;
1637 struct input_mt *mt = input_dev->mt;
1638 int i;
1639
1640 if (mt) {
1641 for (i = 0; i < mt->num_slots; i++) {
1642 input_mt_slot(input_dev, i);
1643 input_mt_report_slot_state(input_dev,
1644 MT_TOOL_FINGER,
1645 false);
1646 }
1647 input_mt_sync_frame(input_dev);
1648 input_sync(input_dev);
1649 }
1650 }
1651
1652 list_for_each_entry(application, &td->applications, list) {
1653 application->num_received = 0;
1654 }
1655}
1656
1657static void mt_expired_timeout(struct timer_list *t)
1658{
1659 struct mt_device *td = from_timer(td, t, release_timer);
1660 struct hid_device *hdev = td->hdev;
1661
1662 /*
1663 * An input report came in just before we release the sticky fingers,
1664 * it will take care of the sticky fingers.
1665 */
1666 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1667 return;
1668 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1669 mt_release_contacts(hdev);
1670 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1671}
1672
1673static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1674{
1675 int ret, i;
1676 struct mt_device *td;
1677 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1678
1679 for (i = 0; mt_classes[i].name ; i++) {
1680 if (id->driver_data == mt_classes[i].name) {
1681 mtclass = &(mt_classes[i]);
1682 break;
1683 }
1684 }
1685
1686 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1687 if (!td) {
1688 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1689 return -ENOMEM;
1690 }
1691 td->hdev = hdev;
1692 td->mtclass = *mtclass;
1693 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1694 hid_set_drvdata(hdev, td);
1695
1696 INIT_LIST_HEAD(&td->applications);
1697 INIT_LIST_HEAD(&td->reports);
1698
1699 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1700 td->serial_maybe = true;
1701
1702 /* This allows the driver to correctly support devices
1703 * that emit events over several HID messages.
1704 */
1705 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1706
1707 /*
1708 * This allows the driver to handle different input sensors
1709 * that emits events through different applications on the same HID
1710 * device.
1711 */
1712 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1713
1714 if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1715 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1716
1717 timer_setup(&td->release_timer, mt_expired_timeout, 0);
1718
1719 ret = hid_parse(hdev);
1720 if (ret != 0)
1721 return ret;
1722
1723 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1724 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1725
1726 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1727 if (ret)
1728 return ret;
1729
1730 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1731 if (ret)
1732 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1733 hdev->name);
1734
1735 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1736
1737 return 0;
1738}
1739
1740#ifdef CONFIG_PM
1741static int mt_reset_resume(struct hid_device *hdev)
1742{
1743 mt_release_contacts(hdev);
1744 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1745 return 0;
1746}
1747
1748static int mt_resume(struct hid_device *hdev)
1749{
1750 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1751 * It should be safe to send it to other devices too.
1752 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1753
1754 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1755
1756 return 0;
1757}
1758#endif
1759
1760static void mt_remove(struct hid_device *hdev)
1761{
1762 struct mt_device *td = hid_get_drvdata(hdev);
1763
1764 del_timer_sync(&td->release_timer);
1765
1766 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1767 hid_hw_stop(hdev);
1768}
1769
1770/*
1771 * This list contains only:
1772 * - VID/PID of products not working with the default multitouch handling
1773 * - 2 generic rules.
1774 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1775 */
1776static const struct hid_device_id mt_devices[] = {
1777
1778 /* 3M panels */
1779 { .driver_data = MT_CLS_3M,
1780 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1781 USB_DEVICE_ID_3M1968) },
1782 { .driver_data = MT_CLS_3M,
1783 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1784 USB_DEVICE_ID_3M2256) },
1785 { .driver_data = MT_CLS_3M,
1786 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1787 USB_DEVICE_ID_3M3266) },
1788
1789 /* Alps devices */
1790 { .driver_data = MT_CLS_WIN_8_DUAL,
1791 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1792 USB_VENDOR_ID_ALPS_JP,
1793 HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
1794 { .driver_data = MT_CLS_WIN_8_DUAL,
1795 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1796 USB_VENDOR_ID_ALPS_JP,
1797 HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
1798 { .driver_data = MT_CLS_WIN_8_DUAL,
1799 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1800 USB_VENDOR_ID_ALPS_JP,
1801 HID_DEVICE_ID_ALPS_1222) },
1802
1803 /* Lenovo X1 TAB Gen 2 */
1804 { .driver_data = MT_CLS_WIN_8_DUAL,
1805 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1806 USB_VENDOR_ID_LENOVO,
1807 USB_DEVICE_ID_LENOVO_X1_TAB) },
1808
1809 /* Lenovo X1 TAB Gen 3 */
1810 { .driver_data = MT_CLS_WIN_8_DUAL,
1811 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1812 USB_VENDOR_ID_LENOVO,
1813 USB_DEVICE_ID_LENOVO_X1_TAB3) },
1814
1815 /* Anton devices */
1816 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1817 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1818 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1819
1820 /* Asus T304UA */
1821 { .driver_data = MT_CLS_ASUS,
1822 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1823 USB_VENDOR_ID_ASUSTEK,
1824 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1825
1826 /* Atmel panels */
1827 { .driver_data = MT_CLS_SERIAL,
1828 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1829 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1830
1831 /* Baanto multitouch devices */
1832 { .driver_data = MT_CLS_NSMU,
1833 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1834 USB_DEVICE_ID_BAANTO_MT_190W2) },
1835
1836 /* Cando panels */
1837 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1838 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1839 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1840 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1841 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1842 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1843
1844 /* Chunghwa Telecom touch panels */
1845 { .driver_data = MT_CLS_NSMU,
1846 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1847 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1848
1849 /* Cirque devices */
1850 { .driver_data = MT_CLS_WIN_8_DUAL,
1851 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1852 I2C_VENDOR_ID_CIRQUE,
1853 I2C_PRODUCT_ID_CIRQUE_121F) },
1854
1855 /* CJTouch panels */
1856 { .driver_data = MT_CLS_NSMU,
1857 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1858 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1859 { .driver_data = MT_CLS_NSMU,
1860 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1861 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1862
1863 /* CVTouch panels */
1864 { .driver_data = MT_CLS_NSMU,
1865 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1866 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1867
1868 /* eGalax devices (resistive) */
1869 { .driver_data = MT_CLS_EGALAX,
1870 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1871 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1872 { .driver_data = MT_CLS_EGALAX,
1873 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1874 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1875
1876 /* eGalax devices (capacitive) */
1877 { .driver_data = MT_CLS_EGALAX_SERIAL,
1878 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1879 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1880 { .driver_data = MT_CLS_EGALAX,
1881 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1882 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1883 { .driver_data = MT_CLS_EGALAX_SERIAL,
1884 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1885 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1886 { .driver_data = MT_CLS_EGALAX_SERIAL,
1887 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1888 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1889 { .driver_data = MT_CLS_EGALAX_SERIAL,
1890 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1891 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1892 { .driver_data = MT_CLS_EGALAX_SERIAL,
1893 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1894 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1895 { .driver_data = MT_CLS_EGALAX,
1896 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1897 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1898 { .driver_data = MT_CLS_EGALAX,
1899 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1900 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1901 { .driver_data = MT_CLS_EGALAX_SERIAL,
1902 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1903 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1904 { .driver_data = MT_CLS_EGALAX,
1905 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1906 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1907 { .driver_data = MT_CLS_EGALAX,
1908 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1909 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1910 { .driver_data = MT_CLS_EGALAX,
1911 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1912 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1913 { .driver_data = MT_CLS_EGALAX,
1914 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1915 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1916 { .driver_data = MT_CLS_EGALAX_SERIAL,
1917 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1918 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1919 { .driver_data = MT_CLS_EGALAX_SERIAL,
1920 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1921 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1922 { .driver_data = MT_CLS_EGALAX_SERIAL,
1923 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1924 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1925
1926 /* Elitegroup panel */
1927 { .driver_data = MT_CLS_SERIAL,
1928 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1929 USB_DEVICE_ID_ELITEGROUP_05D8) },
1930
1931 /* Flatfrog Panels */
1932 { .driver_data = MT_CLS_FLATFROG,
1933 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1934 USB_DEVICE_ID_MULTITOUCH_3200) },
1935
1936 /* FocalTech Panels */
1937 { .driver_data = MT_CLS_SERIAL,
1938 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1939 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1940
1941 /* GeneralTouch panel */
1942 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1943 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1944 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1945 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1946 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1947 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1948 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1949 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1950 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1951 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1952 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1953 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1954 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1955 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1956 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1957 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1958 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1959 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1960 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1961 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1962 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1963
1964 /* Gametel game controller */
1965 { .driver_data = MT_CLS_NSMU,
1966 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1967 USB_DEVICE_ID_GAMETEL_MT_MODE) },
1968
1969 /* GoodTouch panels */
1970 { .driver_data = MT_CLS_NSMU,
1971 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1972 USB_DEVICE_ID_GOODTOUCH_000f) },
1973
1974 /* Hanvon panels */
1975 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1976 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1977 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1978
1979 /* Ilitek dual touch panel */
1980 { .driver_data = MT_CLS_NSMU,
1981 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1982 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1983
1984 /* LG Melfas panel */
1985 { .driver_data = MT_CLS_LG,
1986 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1987 USB_DEVICE_ID_LG_MELFAS_MT) },
1988
1989 /* MosArt panels */
1990 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1991 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1992 USB_DEVICE_ID_ASUS_T91MT)},
1993 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1994 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1995 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1996 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1997 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1998 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1999
2000 /* Novatek Panel */
2001 { .driver_data = MT_CLS_NSMU,
2002 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2003 USB_DEVICE_ID_NOVATEK_PCT) },
2004
2005 /* Ntrig Panel */
2006 { .driver_data = MT_CLS_NSMU,
2007 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2008 USB_VENDOR_ID_NTRIG, 0x1b05) },
2009
2010 /* Panasonic panels */
2011 { .driver_data = MT_CLS_PANASONIC,
2012 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2013 USB_DEVICE_ID_PANABOARD_UBT780) },
2014 { .driver_data = MT_CLS_PANASONIC,
2015 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2016 USB_DEVICE_ID_PANABOARD_UBT880) },
2017
2018 /* PixArt optical touch screen */
2019 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2020 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2021 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2022 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2023 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2024 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2025 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2026 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2027 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2028
2029 /* PixCir-based panels */
2030 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2031 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2032 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2033
2034 /* Quanta-based panels */
2035 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2036 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2037 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2038
2039 /* Razer touchpads */
2040 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2041 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2042 USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2043
2044 /* Smart Tech panels */
2045 { .driver_data = MT_CLS_SMART_TECH,
2046 MT_USB_DEVICE(0x0b8c, 0x0092)},
2047
2048 /* Stantum panels */
2049 { .driver_data = MT_CLS_CONFIDENCE,
2050 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2051 USB_DEVICE_ID_MTP_STM)},
2052
2053 /* TopSeed panels */
2054 { .driver_data = MT_CLS_TOPSEED,
2055 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2056 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2057
2058 /* Touch International panels */
2059 { .driver_data = MT_CLS_NSMU,
2060 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2061 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2062
2063 /* Unitec panels */
2064 { .driver_data = MT_CLS_NSMU,
2065 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2066 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2067 { .driver_data = MT_CLS_NSMU,
2068 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2069 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2070
2071 /* VTL panels */
2072 { .driver_data = MT_CLS_VTL,
2073 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2074 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2075
2076 /* Wistron panels */
2077 { .driver_data = MT_CLS_NSMU,
2078 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2079 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2080
2081 /* XAT */
2082 { .driver_data = MT_CLS_NSMU,
2083 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2084 USB_DEVICE_ID_XAT_CSR) },
2085
2086 /* Xiroku */
2087 { .driver_data = MT_CLS_NSMU,
2088 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2089 USB_DEVICE_ID_XIROKU_SPX) },
2090 { .driver_data = MT_CLS_NSMU,
2091 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2092 USB_DEVICE_ID_XIROKU_MPX) },
2093 { .driver_data = MT_CLS_NSMU,
2094 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2095 USB_DEVICE_ID_XIROKU_CSR) },
2096 { .driver_data = MT_CLS_NSMU,
2097 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2098 USB_DEVICE_ID_XIROKU_SPX1) },
2099 { .driver_data = MT_CLS_NSMU,
2100 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2101 USB_DEVICE_ID_XIROKU_MPX1) },
2102 { .driver_data = MT_CLS_NSMU,
2103 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2104 USB_DEVICE_ID_XIROKU_CSR1) },
2105 { .driver_data = MT_CLS_NSMU,
2106 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2107 USB_DEVICE_ID_XIROKU_SPX2) },
2108 { .driver_data = MT_CLS_NSMU,
2109 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2110 USB_DEVICE_ID_XIROKU_MPX2) },
2111 { .driver_data = MT_CLS_NSMU,
2112 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2113 USB_DEVICE_ID_XIROKU_CSR2) },
2114
2115 /* Google MT devices */
2116 { .driver_data = MT_CLS_GOOGLE,
2117 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2118 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2119
2120 /* Generic MT device */
2121 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2122
2123 /* Generic Win 8 certified MT device */
2124 { .driver_data = MT_CLS_WIN_8,
2125 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2126 HID_ANY_ID, HID_ANY_ID) },
2127 { }
2128};
2129MODULE_DEVICE_TABLE(hid, mt_devices);
2130
2131static const struct hid_usage_id mt_grabbed_usages[] = {
2132 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2133 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2134};
2135
2136static struct hid_driver mt_driver = {
2137 .name = "hid-multitouch",
2138 .id_table = mt_devices,
2139 .probe = mt_probe,
2140 .remove = mt_remove,
2141 .input_mapping = mt_input_mapping,
2142 .input_mapped = mt_input_mapped,
2143 .input_configured = mt_input_configured,
2144 .feature_mapping = mt_feature_mapping,
2145 .usage_table = mt_grabbed_usages,
2146 .event = mt_event,
2147 .report = mt_report,
2148#ifdef CONFIG_PM
2149 .reset_resume = mt_reset_resume,
2150 .resume = mt_resume,
2151#endif
2152};
2153module_hid_driver(mt_driver);
1/*
2 * HID driver for multitouch panels
3 *
4 * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
5 * Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
6 * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
7 * Copyright (c) 2012-2013 Red Hat, Inc
8 *
9 * This code is partly based on hid-egalax.c:
10 *
11 * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
12 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
13 * Copyright (c) 2010 Canonical, Ltd.
14 *
15 * This code is partly based on hid-3m-pct.c:
16 *
17 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
18 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
19 * Copyright (c) 2010 Canonical, Ltd.
20 *
21 */
22
23/*
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License as published by the Free
26 * Software Foundation; either version 2 of the License, or (at your option)
27 * any later version.
28 */
29
30/*
31 * This driver is regularly tested thanks to the tool hid-test[1].
32 * This tool relies on hid-replay[2] and a database of hid devices[3].
33 * Please run these regression tests before patching this module so that
34 * your patch won't break existing known devices.
35 *
36 * [1] https://github.com/bentiss/hid-test
37 * [2] https://github.com/bentiss/hid-replay
38 * [3] https://github.com/bentiss/hid-devices
39 */
40
41#include <linux/device.h>
42#include <linux/hid.h>
43#include <linux/module.h>
44#include <linux/slab.h>
45#include <linux/input/mt.h>
46#include <linux/string.h>
47
48
49MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
50MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
51MODULE_DESCRIPTION("HID multitouch panels");
52MODULE_LICENSE("GPL");
53
54#include "hid-ids.h"
55
56/* quirks to control the device */
57#define MT_QUIRK_NOT_SEEN_MEANS_UP (1 << 0)
58#define MT_QUIRK_SLOT_IS_CONTACTID (1 << 1)
59#define MT_QUIRK_CYPRESS (1 << 2)
60#define MT_QUIRK_SLOT_IS_CONTACTNUMBER (1 << 3)
61#define MT_QUIRK_ALWAYS_VALID (1 << 4)
62#define MT_QUIRK_VALID_IS_INRANGE (1 << 5)
63#define MT_QUIRK_VALID_IS_CONFIDENCE (1 << 6)
64#define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE (1 << 8)
65#define MT_QUIRK_NO_AREA (1 << 9)
66#define MT_QUIRK_IGNORE_DUPLICATES (1 << 10)
67#define MT_QUIRK_HOVERING (1 << 11)
68#define MT_QUIRK_CONTACT_CNT_ACCURATE (1 << 12)
69#define MT_QUIRK_FORCE_GET_FEATURE (1 << 13)
70
71#define MT_INPUTMODE_TOUCHSCREEN 0x02
72#define MT_INPUTMODE_TOUCHPAD 0x03
73
74#define MT_BUTTONTYPE_CLICKPAD 0
75
76struct mt_slot {
77 __s32 x, y, cx, cy, p, w, h;
78 __s32 contactid; /* the device ContactID assigned to this slot */
79 bool touch_state; /* is the touch valid? */
80 bool inrange_state; /* is the finger in proximity of the sensor? */
81};
82
83struct mt_class {
84 __s32 name; /* MT_CLS */
85 __s32 quirks;
86 __s32 sn_move; /* Signal/noise ratio for move events */
87 __s32 sn_width; /* Signal/noise ratio for width events */
88 __s32 sn_height; /* Signal/noise ratio for height events */
89 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
90 __u8 maxcontacts;
91 bool is_indirect; /* true for touchpads */
92 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
93};
94
95struct mt_fields {
96 unsigned usages[HID_MAX_FIELDS];
97 unsigned int length;
98};
99
100struct mt_device {
101 struct mt_slot curdata; /* placeholder of incoming data */
102 struct mt_class mtclass; /* our mt device class */
103 struct mt_fields *fields; /* temporary placeholder for storing the
104 multitouch fields */
105 int cc_index; /* contact count field index in the report */
106 int cc_value_index; /* contact count value index in the field */
107 unsigned last_slot_field; /* the last field of a slot */
108 unsigned mt_report_id; /* the report ID of the multitouch device */
109 __s16 inputmode; /* InputMode HID feature, -1 if non-existent */
110 __s16 inputmode_index; /* InputMode HID feature index in the report */
111 __s16 maxcontact_report_id; /* Maximum Contact Number HID feature,
112 -1 if non-existent */
113 __u8 inputmode_value; /* InputMode HID feature value */
114 __u8 num_received; /* how many contacts we received */
115 __u8 num_expected; /* expected last contact index */
116 __u8 maxcontacts;
117 __u8 touches_by_report; /* how many touches are present in one report:
118 * 1 means we should use a serial protocol
119 * > 1 means hybrid (multitouch) protocol */
120 __u8 buttons_count; /* number of physical buttons per touchpad */
121 bool is_buttonpad; /* is this device a button pad? */
122 bool serial_maybe; /* need to check for serial protocol */
123 bool curvalid; /* is the current contact valid? */
124 unsigned mt_flags; /* flags to pass to input-mt */
125};
126
127static void mt_post_parse_default_settings(struct mt_device *td);
128static void mt_post_parse(struct mt_device *td);
129
130/* classes of device behavior */
131#define MT_CLS_DEFAULT 0x0001
132
133#define MT_CLS_SERIAL 0x0002
134#define MT_CLS_CONFIDENCE 0x0003
135#define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
136#define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
137#define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
138#define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
139/* reserved 0x0008 */
140#define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
141#define MT_CLS_NSMU 0x000a
142/* reserved 0x0010 */
143/* reserved 0x0011 */
144#define MT_CLS_WIN_8 0x0012
145#define MT_CLS_EXPORT_ALL_INPUTS 0x0013
146
147/* vendor specific classes */
148#define MT_CLS_3M 0x0101
149/* reserved 0x0102 */
150#define MT_CLS_EGALAX 0x0103
151#define MT_CLS_EGALAX_SERIAL 0x0104
152#define MT_CLS_TOPSEED 0x0105
153#define MT_CLS_PANASONIC 0x0106
154#define MT_CLS_FLATFROG 0x0107
155#define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
156#define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
157#define MT_CLS_VTL 0x0110
158
159#define MT_DEFAULT_MAXCONTACT 10
160#define MT_MAX_MAXCONTACT 250
161
162#define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
163#define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
164
165/*
166 * these device-dependent functions determine what slot corresponds
167 * to a valid contact that was just read.
168 */
169
170static int cypress_compute_slot(struct mt_device *td)
171{
172 if (td->curdata.contactid != 0 || td->num_received == 0)
173 return td->curdata.contactid;
174 else
175 return -1;
176}
177
178static struct mt_class mt_classes[] = {
179 { .name = MT_CLS_DEFAULT,
180 .quirks = MT_QUIRK_ALWAYS_VALID |
181 MT_QUIRK_CONTACT_CNT_ACCURATE },
182 { .name = MT_CLS_NSMU,
183 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
184 { .name = MT_CLS_SERIAL,
185 .quirks = MT_QUIRK_ALWAYS_VALID},
186 { .name = MT_CLS_CONFIDENCE,
187 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
188 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
189 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
190 MT_QUIRK_SLOT_IS_CONTACTID },
191 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
192 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
193 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
194 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
195 .quirks = MT_QUIRK_VALID_IS_INRANGE |
196 MT_QUIRK_SLOT_IS_CONTACTID,
197 .maxcontacts = 2 },
198 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
199 .quirks = MT_QUIRK_VALID_IS_INRANGE |
200 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
201 .maxcontacts = 2 },
202 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
203 .quirks = MT_QUIRK_VALID_IS_INRANGE |
204 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
205 { .name = MT_CLS_WIN_8,
206 .quirks = MT_QUIRK_ALWAYS_VALID |
207 MT_QUIRK_IGNORE_DUPLICATES |
208 MT_QUIRK_HOVERING |
209 MT_QUIRK_CONTACT_CNT_ACCURATE },
210 { .name = MT_CLS_EXPORT_ALL_INPUTS,
211 .quirks = MT_QUIRK_ALWAYS_VALID |
212 MT_QUIRK_CONTACT_CNT_ACCURATE,
213 .export_all_inputs = true },
214
215 /*
216 * vendor specific classes
217 */
218 { .name = MT_CLS_3M,
219 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
220 MT_QUIRK_SLOT_IS_CONTACTID,
221 .sn_move = 2048,
222 .sn_width = 128,
223 .sn_height = 128,
224 .maxcontacts = 60,
225 },
226 { .name = MT_CLS_EGALAX,
227 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
228 MT_QUIRK_VALID_IS_INRANGE,
229 .sn_move = 4096,
230 .sn_pressure = 32,
231 },
232 { .name = MT_CLS_EGALAX_SERIAL,
233 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
234 MT_QUIRK_ALWAYS_VALID,
235 .sn_move = 4096,
236 .sn_pressure = 32,
237 },
238 { .name = MT_CLS_TOPSEED,
239 .quirks = MT_QUIRK_ALWAYS_VALID,
240 .is_indirect = true,
241 .maxcontacts = 2,
242 },
243 { .name = MT_CLS_PANASONIC,
244 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
245 .maxcontacts = 4 },
246 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
247 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
248 MT_QUIRK_VALID_IS_INRANGE |
249 MT_QUIRK_SLOT_IS_CONTACTID,
250 .maxcontacts = 2
251 },
252 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
253 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
254 MT_QUIRK_SLOT_IS_CONTACTID
255 },
256
257 { .name = MT_CLS_FLATFROG,
258 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
259 MT_QUIRK_NO_AREA,
260 .sn_move = 2048,
261 .maxcontacts = 40,
262 },
263 { .name = MT_CLS_VTL,
264 .quirks = MT_QUIRK_ALWAYS_VALID |
265 MT_QUIRK_CONTACT_CNT_ACCURATE |
266 MT_QUIRK_FORCE_GET_FEATURE,
267 },
268 { }
269};
270
271static ssize_t mt_show_quirks(struct device *dev,
272 struct device_attribute *attr,
273 char *buf)
274{
275 struct hid_device *hdev = to_hid_device(dev);
276 struct mt_device *td = hid_get_drvdata(hdev);
277
278 return sprintf(buf, "%u\n", td->mtclass.quirks);
279}
280
281static ssize_t mt_set_quirks(struct device *dev,
282 struct device_attribute *attr,
283 const char *buf, size_t count)
284{
285 struct hid_device *hdev = to_hid_device(dev);
286 struct mt_device *td = hid_get_drvdata(hdev);
287
288 unsigned long val;
289
290 if (kstrtoul(buf, 0, &val))
291 return -EINVAL;
292
293 td->mtclass.quirks = val;
294
295 if (td->cc_index < 0)
296 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
297
298 return count;
299}
300
301static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
302
303static struct attribute *sysfs_attrs[] = {
304 &dev_attr_quirks.attr,
305 NULL
306};
307
308static struct attribute_group mt_attribute_group = {
309 .attrs = sysfs_attrs
310};
311
312static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
313{
314 struct mt_device *td = hid_get_drvdata(hdev);
315 int ret, size = hid_report_len(report);
316 u8 *buf;
317
318 /*
319 * Only fetch the feature report if initial reports are not already
320 * been retrieved. Currently this is only done for Windows 8 touch
321 * devices.
322 */
323 if (!(hdev->quirks & HID_QUIRK_NO_INIT_REPORTS))
324 return;
325 if (td->mtclass.name != MT_CLS_WIN_8)
326 return;
327
328 buf = hid_alloc_report_buf(report, GFP_KERNEL);
329 if (!buf)
330 return;
331
332 ret = hid_hw_raw_request(hdev, report->id, buf, size,
333 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
334 if (ret < 0) {
335 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
336 report->id);
337 } else {
338 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
339 size, 0);
340 if (ret)
341 dev_warn(&hdev->dev, "failed to report feature\n");
342 }
343
344 kfree(buf);
345}
346
347static void mt_feature_mapping(struct hid_device *hdev,
348 struct hid_field *field, struct hid_usage *usage)
349{
350 struct mt_device *td = hid_get_drvdata(hdev);
351
352 switch (usage->hid) {
353 case HID_DG_INPUTMODE:
354 /* Ignore if value index is out of bounds. */
355 if (usage->usage_index >= field->report_count) {
356 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
357 break;
358 }
359
360 if (td->inputmode < 0) {
361 td->inputmode = field->report->id;
362 td->inputmode_index = usage->usage_index;
363 } else {
364 /*
365 * Some elan panels wrongly declare 2 input mode
366 * features, and silently ignore when we set the
367 * value in the second field. Skip the second feature
368 * and hope for the best.
369 */
370 dev_info(&hdev->dev,
371 "Ignoring the extra HID_DG_INPUTMODE\n");
372 }
373
374 break;
375 case HID_DG_CONTACTMAX:
376 mt_get_feature(hdev, field->report);
377
378 td->maxcontact_report_id = field->report->id;
379 td->maxcontacts = field->value[0];
380 if (!td->maxcontacts &&
381 field->logical_maximum <= MT_MAX_MAXCONTACT)
382 td->maxcontacts = field->logical_maximum;
383 if (td->mtclass.maxcontacts)
384 /* check if the maxcontacts is given by the class */
385 td->maxcontacts = td->mtclass.maxcontacts;
386
387 break;
388 case HID_DG_BUTTONTYPE:
389 if (usage->usage_index >= field->report_count) {
390 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
391 break;
392 }
393
394 mt_get_feature(hdev, field->report);
395 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
396 td->is_buttonpad = true;
397
398 break;
399 case 0xff0000c5:
400 /* Retrieve the Win8 blob once to enable some devices */
401 if (usage->usage_index == 0)
402 mt_get_feature(hdev, field->report);
403 break;
404 }
405}
406
407static void set_abs(struct input_dev *input, unsigned int code,
408 struct hid_field *field, int snratio)
409{
410 int fmin = field->logical_minimum;
411 int fmax = field->logical_maximum;
412 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
413 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
414 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
415}
416
417static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
418 struct hid_input *hi)
419{
420 struct mt_fields *f = td->fields;
421
422 if (f->length >= HID_MAX_FIELDS)
423 return;
424
425 f->usages[f->length++] = usage->hid;
426}
427
428static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
429 struct hid_field *field, struct hid_usage *usage,
430 unsigned long **bit, int *max)
431{
432 struct mt_device *td = hid_get_drvdata(hdev);
433 struct mt_class *cls = &td->mtclass;
434 int code;
435 struct hid_usage *prev_usage = NULL;
436
437 if (field->application == HID_DG_TOUCHSCREEN)
438 td->mt_flags |= INPUT_MT_DIRECT;
439
440 /*
441 * Model touchscreens providing buttons as touchpads.
442 */
443 if (field->application == HID_DG_TOUCHPAD ||
444 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
445 td->mt_flags |= INPUT_MT_POINTER;
446 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
447 }
448
449 /* count the buttons on touchpads */
450 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
451 td->buttons_count++;
452
453 if (usage->usage_index)
454 prev_usage = &field->usage[usage->usage_index - 1];
455
456 switch (usage->hid & HID_USAGE_PAGE) {
457
458 case HID_UP_GENDESK:
459 switch (usage->hid) {
460 case HID_GD_X:
461 if (prev_usage && (prev_usage->hid == usage->hid)) {
462 hid_map_usage(hi, usage, bit, max,
463 EV_ABS, ABS_MT_TOOL_X);
464 set_abs(hi->input, ABS_MT_TOOL_X, field,
465 cls->sn_move);
466 } else {
467 hid_map_usage(hi, usage, bit, max,
468 EV_ABS, ABS_MT_POSITION_X);
469 set_abs(hi->input, ABS_MT_POSITION_X, field,
470 cls->sn_move);
471 }
472
473 mt_store_field(usage, td, hi);
474 return 1;
475 case HID_GD_Y:
476 if (prev_usage && (prev_usage->hid == usage->hid)) {
477 hid_map_usage(hi, usage, bit, max,
478 EV_ABS, ABS_MT_TOOL_Y);
479 set_abs(hi->input, ABS_MT_TOOL_Y, field,
480 cls->sn_move);
481 } else {
482 hid_map_usage(hi, usage, bit, max,
483 EV_ABS, ABS_MT_POSITION_Y);
484 set_abs(hi->input, ABS_MT_POSITION_Y, field,
485 cls->sn_move);
486 }
487
488 mt_store_field(usage, td, hi);
489 return 1;
490 }
491 return 0;
492
493 case HID_UP_DIGITIZER:
494 switch (usage->hid) {
495 case HID_DG_INRANGE:
496 if (cls->quirks & MT_QUIRK_HOVERING) {
497 hid_map_usage(hi, usage, bit, max,
498 EV_ABS, ABS_MT_DISTANCE);
499 input_set_abs_params(hi->input,
500 ABS_MT_DISTANCE, 0, 1, 0, 0);
501 }
502 mt_store_field(usage, td, hi);
503 return 1;
504 case HID_DG_CONFIDENCE:
505 if (cls->name == MT_CLS_WIN_8 &&
506 field->application == HID_DG_TOUCHPAD) {
507 cls->quirks &= ~MT_QUIRK_ALWAYS_VALID;
508 cls->quirks |= MT_QUIRK_VALID_IS_CONFIDENCE;
509 }
510 mt_store_field(usage, td, hi);
511 return 1;
512 case HID_DG_TIPSWITCH:
513 hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
514 input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
515 mt_store_field(usage, td, hi);
516 return 1;
517 case HID_DG_CONTACTID:
518 mt_store_field(usage, td, hi);
519 td->touches_by_report++;
520 td->mt_report_id = field->report->id;
521 return 1;
522 case HID_DG_WIDTH:
523 hid_map_usage(hi, usage, bit, max,
524 EV_ABS, ABS_MT_TOUCH_MAJOR);
525 if (!(cls->quirks & MT_QUIRK_NO_AREA))
526 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
527 cls->sn_width);
528 mt_store_field(usage, td, hi);
529 return 1;
530 case HID_DG_HEIGHT:
531 hid_map_usage(hi, usage, bit, max,
532 EV_ABS, ABS_MT_TOUCH_MINOR);
533 if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
534 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
535 cls->sn_height);
536 input_set_abs_params(hi->input,
537 ABS_MT_ORIENTATION, 0, 1, 0, 0);
538 }
539 mt_store_field(usage, td, hi);
540 return 1;
541 case HID_DG_TIPPRESSURE:
542 hid_map_usage(hi, usage, bit, max,
543 EV_ABS, ABS_MT_PRESSURE);
544 set_abs(hi->input, ABS_MT_PRESSURE, field,
545 cls->sn_pressure);
546 mt_store_field(usage, td, hi);
547 return 1;
548 case HID_DG_CONTACTCOUNT:
549 /* Ignore if indexes are out of bounds. */
550 if (field->index >= field->report->maxfield ||
551 usage->usage_index >= field->report_count)
552 return 1;
553 td->cc_index = field->index;
554 td->cc_value_index = usage->usage_index;
555 return 1;
556 case HID_DG_CONTACTMAX:
557 /* we don't set td->last_slot_field as contactcount and
558 * contact max are global to the report */
559 return -1;
560 case HID_DG_TOUCH:
561 /* Legacy devices use TIPSWITCH and not TOUCH.
562 * Let's just ignore this field. */
563 return -1;
564 }
565 /* let hid-input decide for the others */
566 return 0;
567
568 case HID_UP_BUTTON:
569 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
570 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
571 input_set_capability(hi->input, EV_KEY, code);
572 return 1;
573
574 case 0xff000000:
575 /* we do not want to map these: no input-oriented meaning */
576 return -1;
577 }
578
579 return 0;
580}
581
582static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
583 struct hid_field *field, struct hid_usage *usage,
584 unsigned long **bit, int *max)
585{
586 if (usage->type == EV_KEY || usage->type == EV_ABS)
587 set_bit(usage->type, hi->input->evbit);
588
589 return -1;
590}
591
592static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
593{
594 __s32 quirks = td->mtclass.quirks;
595
596 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
597 return td->curdata.contactid;
598
599 if (quirks & MT_QUIRK_CYPRESS)
600 return cypress_compute_slot(td);
601
602 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
603 return td->num_received;
604
605 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
606 return td->curdata.contactid - 1;
607
608 return input_mt_get_slot_by_key(input, td->curdata.contactid);
609}
610
611/*
612 * this function is called when a whole contact has been processed,
613 * so that it can assign it to a slot and store the data there
614 */
615static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
616{
617 if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
618 td->num_received >= td->num_expected)
619 return;
620
621 if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
622 int slotnum = mt_compute_slot(td, input);
623 struct mt_slot *s = &td->curdata;
624 struct input_mt *mt = input->mt;
625
626 if (slotnum < 0 || slotnum >= td->maxcontacts)
627 return;
628
629 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
630 struct input_mt_slot *slot = &mt->slots[slotnum];
631 if (input_mt_is_active(slot) &&
632 input_mt_is_used(mt, slot))
633 return;
634 }
635
636 input_mt_slot(input, slotnum);
637 input_mt_report_slot_state(input, MT_TOOL_FINGER,
638 s->touch_state || s->inrange_state);
639 if (s->touch_state || s->inrange_state) {
640 /* this finger is in proximity of the sensor */
641 int wide = (s->w > s->h);
642 /* divided by two to match visual scale of touch */
643 int major = max(s->w, s->h) >> 1;
644 int minor = min(s->w, s->h) >> 1;
645
646 input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
647 input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
648 input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
649 input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
650 input_event(input, EV_ABS, ABS_MT_DISTANCE,
651 !s->touch_state);
652 input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
653 input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
654 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
655 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
656 }
657 }
658
659 td->num_received++;
660}
661
662/*
663 * this function is called when a whole packet has been received and processed,
664 * so that it can decide what to send to the input layer.
665 */
666static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
667{
668 input_mt_sync_frame(input);
669 input_sync(input);
670 td->num_received = 0;
671}
672
673static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
674 struct hid_usage *usage, __s32 value)
675{
676 /* we will handle the hidinput part later, now remains hiddev */
677 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
678 hid->hiddev_hid_event(hid, field, usage, value);
679
680 return 1;
681}
682
683static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
684 struct hid_usage *usage, __s32 value)
685{
686 struct mt_device *td = hid_get_drvdata(hid);
687 __s32 quirks = td->mtclass.quirks;
688 struct input_dev *input = field->hidinput->input;
689
690 if (hid->claimed & HID_CLAIMED_INPUT) {
691 switch (usage->hid) {
692 case HID_DG_INRANGE:
693 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
694 td->curvalid = value;
695 if (quirks & MT_QUIRK_HOVERING)
696 td->curdata.inrange_state = value;
697 break;
698 case HID_DG_TIPSWITCH:
699 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
700 td->curvalid = value;
701 td->curdata.touch_state = value;
702 break;
703 case HID_DG_CONFIDENCE:
704 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
705 td->curvalid = value;
706 break;
707 case HID_DG_CONTACTID:
708 td->curdata.contactid = value;
709 break;
710 case HID_DG_TIPPRESSURE:
711 td->curdata.p = value;
712 break;
713 case HID_GD_X:
714 if (usage->code == ABS_MT_TOOL_X)
715 td->curdata.cx = value;
716 else
717 td->curdata.x = value;
718 break;
719 case HID_GD_Y:
720 if (usage->code == ABS_MT_TOOL_Y)
721 td->curdata.cy = value;
722 else
723 td->curdata.y = value;
724 break;
725 case HID_DG_WIDTH:
726 td->curdata.w = value;
727 break;
728 case HID_DG_HEIGHT:
729 td->curdata.h = value;
730 break;
731 case HID_DG_CONTACTCOUNT:
732 break;
733 case HID_DG_TOUCH:
734 /* do nothing */
735 break;
736
737 default:
738 if (usage->type)
739 input_event(input, usage->type, usage->code,
740 value);
741 return;
742 }
743
744 if (usage->usage_index + 1 == field->report_count) {
745 /* we only take into account the last report. */
746 if (usage->hid == td->last_slot_field)
747 mt_complete_slot(td, field->hidinput->input);
748 }
749
750 }
751}
752
753static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
754{
755 struct mt_device *td = hid_get_drvdata(hid);
756 struct hid_field *field;
757 unsigned count;
758 int r, n;
759
760 /*
761 * Includes multi-packet support where subsequent
762 * packets are sent with zero contactcount.
763 */
764 if (td->cc_index >= 0) {
765 struct hid_field *field = report->field[td->cc_index];
766 int value = field->value[td->cc_value_index];
767 if (value)
768 td->num_expected = value;
769 }
770
771 for (r = 0; r < report->maxfield; r++) {
772 field = report->field[r];
773 count = field->report_count;
774
775 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
776 continue;
777
778 for (n = 0; n < count; n++)
779 mt_process_mt_event(hid, field, &field->usage[n],
780 field->value[n]);
781 }
782
783 if (td->num_received >= td->num_expected)
784 mt_sync_frame(td, report->field[0]->hidinput->input);
785}
786
787static int mt_touch_input_configured(struct hid_device *hdev,
788 struct hid_input *hi)
789{
790 struct mt_device *td = hid_get_drvdata(hdev);
791 struct mt_class *cls = &td->mtclass;
792 struct input_dev *input = hi->input;
793 int ret;
794
795 if (!td->maxcontacts)
796 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
797
798 mt_post_parse(td);
799 if (td->serial_maybe)
800 mt_post_parse_default_settings(td);
801
802 if (cls->is_indirect)
803 td->mt_flags |= INPUT_MT_POINTER;
804
805 if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
806 td->mt_flags |= INPUT_MT_DROP_UNUSED;
807
808 /* check for clickpads */
809 if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
810 td->is_buttonpad = true;
811
812 if (td->is_buttonpad)
813 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
814
815 ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
816 if (ret)
817 return ret;
818
819 td->mt_flags = 0;
820 return 0;
821}
822
823static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
824 struct hid_field *field, struct hid_usage *usage,
825 unsigned long **bit, int *max)
826{
827 struct mt_device *td = hid_get_drvdata(hdev);
828
829 /*
830 * If mtclass.export_all_inputs is not set, only map fields from
831 * TouchScreen or TouchPad collections. We need to ignore fields
832 * that belong to other collections such as Mouse that might have
833 * the same GenericDesktop usages.
834 */
835 if (!td->mtclass.export_all_inputs &&
836 field->application != HID_DG_TOUCHSCREEN &&
837 field->application != HID_DG_PEN &&
838 field->application != HID_DG_TOUCHPAD)
839 return -1;
840
841 /*
842 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
843 * for the stylus.
844 * The check for mt_report_id ensures we don't process
845 * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
846 * collection, but within the report ID.
847 */
848 if (field->physical == HID_DG_STYLUS)
849 return 0;
850 else if ((field->physical == 0) &&
851 (field->report->id != td->mt_report_id) &&
852 (td->mt_report_id != -1))
853 return 0;
854
855 if (field->application == HID_DG_TOUCHSCREEN ||
856 field->application == HID_DG_TOUCHPAD)
857 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
858
859 /* let hid-core decide for the others */
860 return 0;
861}
862
863static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
864 struct hid_field *field, struct hid_usage *usage,
865 unsigned long **bit, int *max)
866{
867 /*
868 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
869 * for the stylus.
870 */
871 if (field->physical == HID_DG_STYLUS)
872 return 0;
873
874 if (field->application == HID_DG_TOUCHSCREEN ||
875 field->application == HID_DG_TOUCHPAD)
876 return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
877
878 /* let hid-core decide for the others */
879 return 0;
880}
881
882static int mt_event(struct hid_device *hid, struct hid_field *field,
883 struct hid_usage *usage, __s32 value)
884{
885 struct mt_device *td = hid_get_drvdata(hid);
886
887 if (field->report->id == td->mt_report_id)
888 return mt_touch_event(hid, field, usage, value);
889
890 return 0;
891}
892
893static void mt_report(struct hid_device *hid, struct hid_report *report)
894{
895 struct mt_device *td = hid_get_drvdata(hid);
896 struct hid_field *field = report->field[0];
897
898 if (!(hid->claimed & HID_CLAIMED_INPUT))
899 return;
900
901 if (report->id == td->mt_report_id)
902 return mt_touch_report(hid, report);
903
904 if (field && field->hidinput && field->hidinput->input)
905 input_sync(field->hidinput->input);
906}
907
908static void mt_set_input_mode(struct hid_device *hdev)
909{
910 struct mt_device *td = hid_get_drvdata(hdev);
911 struct hid_report *r;
912 struct hid_report_enum *re;
913 struct mt_class *cls = &td->mtclass;
914 char *buf;
915 int report_len;
916
917 if (td->inputmode < 0)
918 return;
919
920 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
921 r = re->report_id_hash[td->inputmode];
922 if (r) {
923 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
924 report_len = hid_report_len(r);
925 buf = hid_alloc_report_buf(r, GFP_KERNEL);
926 if (!buf) {
927 hid_err(hdev, "failed to allocate buffer for report\n");
928 return;
929 }
930 hid_hw_raw_request(hdev, r->id, buf, report_len,
931 HID_FEATURE_REPORT,
932 HID_REQ_GET_REPORT);
933 kfree(buf);
934 }
935 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
936 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
937 }
938}
939
940static void mt_set_maxcontacts(struct hid_device *hdev)
941{
942 struct mt_device *td = hid_get_drvdata(hdev);
943 struct hid_report *r;
944 struct hid_report_enum *re;
945 int fieldmax, max;
946
947 if (td->maxcontact_report_id < 0)
948 return;
949
950 if (!td->mtclass.maxcontacts)
951 return;
952
953 re = &hdev->report_enum[HID_FEATURE_REPORT];
954 r = re->report_id_hash[td->maxcontact_report_id];
955 if (r) {
956 max = td->mtclass.maxcontacts;
957 fieldmax = r->field[0]->logical_maximum;
958 max = min(fieldmax, max);
959 if (r->field[0]->value[0] != max) {
960 r->field[0]->value[0] = max;
961 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
962 }
963 }
964}
965
966static void mt_post_parse_default_settings(struct mt_device *td)
967{
968 __s32 quirks = td->mtclass.quirks;
969
970 /* unknown serial device needs special quirks */
971 if (td->touches_by_report == 1) {
972 quirks |= MT_QUIRK_ALWAYS_VALID;
973 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
974 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
975 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
976 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
977 }
978
979 td->mtclass.quirks = quirks;
980}
981
982static void mt_post_parse(struct mt_device *td)
983{
984 struct mt_fields *f = td->fields;
985 struct mt_class *cls = &td->mtclass;
986
987 if (td->touches_by_report > 0) {
988 int field_count_per_touch = f->length / td->touches_by_report;
989 td->last_slot_field = f->usages[field_count_per_touch - 1];
990 }
991
992 if (td->cc_index < 0)
993 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
994}
995
996static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
997{
998 struct mt_device *td = hid_get_drvdata(hdev);
999 char *name;
1000 const char *suffix = NULL;
1001 struct hid_field *field = hi->report->field[0];
1002 int ret;
1003
1004 if (hi->report->id == td->mt_report_id) {
1005 ret = mt_touch_input_configured(hdev, hi);
1006 if (ret)
1007 return ret;
1008 }
1009
1010 /*
1011 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1012 * for the stylus. Check this first, and then rely on the application
1013 * field.
1014 */
1015 if (hi->report->field[0]->physical == HID_DG_STYLUS) {
1016 suffix = "Pen";
1017 /* force BTN_STYLUS to allow tablet matching in udev */
1018 __set_bit(BTN_STYLUS, hi->input->keybit);
1019 } else {
1020 switch (field->application) {
1021 case HID_GD_KEYBOARD:
1022 suffix = "Keyboard";
1023 break;
1024 case HID_GD_KEYPAD:
1025 suffix = "Keypad";
1026 break;
1027 case HID_GD_MOUSE:
1028 suffix = "Mouse";
1029 break;
1030 case HID_DG_STYLUS:
1031 suffix = "Pen";
1032 /* force BTN_STYLUS to allow tablet matching in udev */
1033 __set_bit(BTN_STYLUS, hi->input->keybit);
1034 break;
1035 case HID_DG_TOUCHSCREEN:
1036 /* we do not set suffix = "Touchscreen" */
1037 break;
1038 case HID_DG_TOUCHPAD:
1039 suffix = "Touchpad";
1040 break;
1041 case HID_GD_SYSTEM_CONTROL:
1042 suffix = "System Control";
1043 break;
1044 case HID_CP_CONSUMER_CONTROL:
1045 suffix = "Consumer Control";
1046 break;
1047 default:
1048 suffix = "UNKNOWN";
1049 break;
1050 }
1051 }
1052
1053 if (suffix) {
1054 name = devm_kzalloc(&hi->input->dev,
1055 strlen(hdev->name) + strlen(suffix) + 2,
1056 GFP_KERNEL);
1057 if (name) {
1058 sprintf(name, "%s %s", hdev->name, suffix);
1059 hi->input->name = name;
1060 }
1061 }
1062
1063 return 0;
1064}
1065
1066static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1067{
1068 int ret, i;
1069 struct mt_device *td;
1070 struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1071
1072 for (i = 0; mt_classes[i].name ; i++) {
1073 if (id->driver_data == mt_classes[i].name) {
1074 mtclass = &(mt_classes[i]);
1075 break;
1076 }
1077 }
1078
1079 /* This allows the driver to correctly support devices
1080 * that emit events over several HID messages.
1081 */
1082 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1083
1084 /*
1085 * This allows the driver to handle different input sensors
1086 * that emits events through different reports on the same HID
1087 * device.
1088 */
1089 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1090 hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
1091
1092 /*
1093 * Handle special quirks for Windows 8 certified devices.
1094 */
1095 if (id->group == HID_GROUP_MULTITOUCH_WIN_8)
1096 /*
1097 * Some multitouch screens do not like to be polled for input
1098 * reports. Fortunately, the Win8 spec says that all touches
1099 * should be sent during each report, making the initialization
1100 * of input reports unnecessary.
1101 *
1102 * In addition some touchpads do not behave well if we read
1103 * all feature reports from them. Instead we prevent
1104 * initial report fetching and then selectively fetch each
1105 * report we are interested in.
1106 */
1107 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1108
1109 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1110 if (!td) {
1111 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1112 return -ENOMEM;
1113 }
1114 td->mtclass = *mtclass;
1115 td->inputmode = -1;
1116 td->maxcontact_report_id = -1;
1117 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1118 td->cc_index = -1;
1119 td->mt_report_id = -1;
1120 hid_set_drvdata(hdev, td);
1121
1122 td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
1123 GFP_KERNEL);
1124 if (!td->fields) {
1125 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1126 return -ENOMEM;
1127 }
1128
1129 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1130 td->serial_maybe = true;
1131
1132 ret = hid_parse(hdev);
1133 if (ret != 0)
1134 return ret;
1135
1136 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1137 if (ret)
1138 return ret;
1139
1140 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1141 if (ret)
1142 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1143 hdev->name);
1144
1145 mt_set_maxcontacts(hdev);
1146 mt_set_input_mode(hdev);
1147
1148 /* release .fields memory as it is not used anymore */
1149 devm_kfree(&hdev->dev, td->fields);
1150 td->fields = NULL;
1151
1152 return 0;
1153}
1154
1155#ifdef CONFIG_PM
1156static void mt_release_contacts(struct hid_device *hid)
1157{
1158 struct hid_input *hidinput;
1159
1160 list_for_each_entry(hidinput, &hid->inputs, list) {
1161 struct input_dev *input_dev = hidinput->input;
1162 struct input_mt *mt = input_dev->mt;
1163 int i;
1164
1165 if (mt) {
1166 for (i = 0; i < mt->num_slots; i++) {
1167 input_mt_slot(input_dev, i);
1168 input_mt_report_slot_state(input_dev,
1169 MT_TOOL_FINGER,
1170 false);
1171 }
1172 input_mt_sync_frame(input_dev);
1173 input_sync(input_dev);
1174 }
1175 }
1176}
1177
1178static int mt_reset_resume(struct hid_device *hdev)
1179{
1180 mt_release_contacts(hdev);
1181 mt_set_maxcontacts(hdev);
1182 mt_set_input_mode(hdev);
1183 return 0;
1184}
1185
1186static int mt_resume(struct hid_device *hdev)
1187{
1188 /* Some Elan legacy devices require SET_IDLE to be set on resume.
1189 * It should be safe to send it to other devices too.
1190 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1191
1192 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1193
1194 return 0;
1195}
1196#endif
1197
1198static void mt_remove(struct hid_device *hdev)
1199{
1200 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1201 hid_hw_stop(hdev);
1202}
1203
1204/*
1205 * This list contains only:
1206 * - VID/PID of products not working with the default multitouch handling
1207 * - 2 generic rules.
1208 * So there is no point in adding here any device with MT_CLS_DEFAULT.
1209 */
1210static const struct hid_device_id mt_devices[] = {
1211
1212 /* 3M panels */
1213 { .driver_data = MT_CLS_3M,
1214 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1215 USB_DEVICE_ID_3M1968) },
1216 { .driver_data = MT_CLS_3M,
1217 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1218 USB_DEVICE_ID_3M2256) },
1219 { .driver_data = MT_CLS_3M,
1220 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1221 USB_DEVICE_ID_3M3266) },
1222
1223 /* Anton devices */
1224 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1225 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1226 USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1227
1228 /* Atmel panels */
1229 { .driver_data = MT_CLS_SERIAL,
1230 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1231 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1232
1233 /* Baanto multitouch devices */
1234 { .driver_data = MT_CLS_NSMU,
1235 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1236 USB_DEVICE_ID_BAANTO_MT_190W2) },
1237
1238 /* Cando panels */
1239 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1240 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1241 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1242 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1243 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1244 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1245
1246 /* Chunghwa Telecom touch panels */
1247 { .driver_data = MT_CLS_NSMU,
1248 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1249 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1250
1251 /* CJTouch panels */
1252 { .driver_data = MT_CLS_NSMU,
1253 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1254 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1255 { .driver_data = MT_CLS_NSMU,
1256 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1257 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1258
1259 /* CVTouch panels */
1260 { .driver_data = MT_CLS_NSMU,
1261 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1262 USB_DEVICE_ID_CVTOUCH_SCREEN) },
1263
1264 /* eGalax devices (resistive) */
1265 { .driver_data = MT_CLS_EGALAX,
1266 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1267 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1268 { .driver_data = MT_CLS_EGALAX,
1269 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1270 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1271
1272 /* eGalax devices (capacitive) */
1273 { .driver_data = MT_CLS_EGALAX_SERIAL,
1274 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1275 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1276 { .driver_data = MT_CLS_EGALAX,
1277 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1278 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1279 { .driver_data = MT_CLS_EGALAX_SERIAL,
1280 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1281 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1282 { .driver_data = MT_CLS_EGALAX_SERIAL,
1283 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1284 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1285 { .driver_data = MT_CLS_EGALAX_SERIAL,
1286 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1287 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1288 { .driver_data = MT_CLS_EGALAX_SERIAL,
1289 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1290 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1291 { .driver_data = MT_CLS_EGALAX,
1292 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1293 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1294 { .driver_data = MT_CLS_EGALAX,
1295 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1296 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1297 { .driver_data = MT_CLS_EGALAX_SERIAL,
1298 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1299 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1300 { .driver_data = MT_CLS_EGALAX,
1301 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1302 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1303 { .driver_data = MT_CLS_EGALAX,
1304 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1305 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1306 { .driver_data = MT_CLS_EGALAX,
1307 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1308 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1309 { .driver_data = MT_CLS_EGALAX,
1310 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1311 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1312 { .driver_data = MT_CLS_EGALAX_SERIAL,
1313 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1314 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1315 { .driver_data = MT_CLS_EGALAX_SERIAL,
1316 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1317 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1318 { .driver_data = MT_CLS_EGALAX_SERIAL,
1319 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1320 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1321
1322 /* Elitegroup panel */
1323 { .driver_data = MT_CLS_SERIAL,
1324 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1325 USB_DEVICE_ID_ELITEGROUP_05D8) },
1326
1327 /* Flatfrog Panels */
1328 { .driver_data = MT_CLS_FLATFROG,
1329 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1330 USB_DEVICE_ID_MULTITOUCH_3200) },
1331
1332 /* FocalTech Panels */
1333 { .driver_data = MT_CLS_SERIAL,
1334 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1335 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1336
1337 /* GeneralTouch panel */
1338 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1339 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1340 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1341 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1342 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1343 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1344 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1345 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1346 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1347 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1348 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1349 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1350 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1351 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1352 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1353 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1354 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1355 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1356 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1357 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1358 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1359
1360 /* Gametel game controller */
1361 { .driver_data = MT_CLS_NSMU,
1362 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1363 USB_DEVICE_ID_GAMETEL_MT_MODE) },
1364
1365 /* GoodTouch panels */
1366 { .driver_data = MT_CLS_NSMU,
1367 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1368 USB_DEVICE_ID_GOODTOUCH_000f) },
1369
1370 /* Hanvon panels */
1371 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1372 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1373 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1374
1375 /* Ilitek dual touch panel */
1376 { .driver_data = MT_CLS_NSMU,
1377 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1378 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1379
1380 /* MosArt panels */
1381 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1382 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1383 USB_DEVICE_ID_ASUS_T91MT)},
1384 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1385 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1386 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1387 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1388 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1389 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1390
1391 /* Panasonic panels */
1392 { .driver_data = MT_CLS_PANASONIC,
1393 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1394 USB_DEVICE_ID_PANABOARD_UBT780) },
1395 { .driver_data = MT_CLS_PANASONIC,
1396 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1397 USB_DEVICE_ID_PANABOARD_UBT880) },
1398
1399 /* Novatek Panel */
1400 { .driver_data = MT_CLS_NSMU,
1401 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1402 USB_DEVICE_ID_NOVATEK_PCT) },
1403
1404 /* PixArt optical touch screen */
1405 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1406 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1407 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1408 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1409 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1410 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1411 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1412 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1413 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1414
1415 /* PixCir-based panels */
1416 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1417 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1418 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1419
1420 /* Quanta-based panels */
1421 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1422 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1423 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1424
1425 /* Stantum panels */
1426 { .driver_data = MT_CLS_CONFIDENCE,
1427 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1428 USB_DEVICE_ID_MTP_STM)},
1429
1430 /* TopSeed panels */
1431 { .driver_data = MT_CLS_TOPSEED,
1432 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1433 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1434
1435 /* Touch International panels */
1436 { .driver_data = MT_CLS_NSMU,
1437 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1438 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1439
1440 /* Unitec panels */
1441 { .driver_data = MT_CLS_NSMU,
1442 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1443 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1444 { .driver_data = MT_CLS_NSMU,
1445 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1446 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1447
1448 /* VTL panels */
1449 { .driver_data = MT_CLS_VTL,
1450 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
1451 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
1452
1453 /* Wistron panels */
1454 { .driver_data = MT_CLS_NSMU,
1455 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1456 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1457
1458 /* XAT */
1459 { .driver_data = MT_CLS_NSMU,
1460 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1461 USB_DEVICE_ID_XAT_CSR) },
1462
1463 /* Xiroku */
1464 { .driver_data = MT_CLS_NSMU,
1465 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1466 USB_DEVICE_ID_XIROKU_SPX) },
1467 { .driver_data = MT_CLS_NSMU,
1468 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1469 USB_DEVICE_ID_XIROKU_MPX) },
1470 { .driver_data = MT_CLS_NSMU,
1471 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1472 USB_DEVICE_ID_XIROKU_CSR) },
1473 { .driver_data = MT_CLS_NSMU,
1474 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1475 USB_DEVICE_ID_XIROKU_SPX1) },
1476 { .driver_data = MT_CLS_NSMU,
1477 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1478 USB_DEVICE_ID_XIROKU_MPX1) },
1479 { .driver_data = MT_CLS_NSMU,
1480 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1481 USB_DEVICE_ID_XIROKU_CSR1) },
1482 { .driver_data = MT_CLS_NSMU,
1483 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1484 USB_DEVICE_ID_XIROKU_SPX2) },
1485 { .driver_data = MT_CLS_NSMU,
1486 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1487 USB_DEVICE_ID_XIROKU_MPX2) },
1488 { .driver_data = MT_CLS_NSMU,
1489 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1490 USB_DEVICE_ID_XIROKU_CSR2) },
1491
1492 /* Generic MT device */
1493 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1494
1495 /* Generic Win 8 certified MT device */
1496 { .driver_data = MT_CLS_WIN_8,
1497 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1498 HID_ANY_ID, HID_ANY_ID) },
1499 { }
1500};
1501MODULE_DEVICE_TABLE(hid, mt_devices);
1502
1503static const struct hid_usage_id mt_grabbed_usages[] = {
1504 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1505 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1506};
1507
1508static struct hid_driver mt_driver = {
1509 .name = "hid-multitouch",
1510 .id_table = mt_devices,
1511 .probe = mt_probe,
1512 .remove = mt_remove,
1513 .input_mapping = mt_input_mapping,
1514 .input_mapped = mt_input_mapped,
1515 .input_configured = mt_input_configured,
1516 .feature_mapping = mt_feature_mapping,
1517 .usage_table = mt_grabbed_usages,
1518 .event = mt_event,
1519 .report = mt_report,
1520#ifdef CONFIG_PM
1521 .reset_resume = mt_reset_resume,
1522 .resume = mt_resume,
1523#endif
1524};
1525module_hid_driver(mt_driver);