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proc: fix mount -t proc -o AAA
[linux/fpc-iii.git] / drivers / hid / hid-multitouch.c
blob1d5b94167b521566268d91077b307c68a29d04cc
1 /*
2 * HID driver for multitouch panels
3 *
4 * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
5 * Copyright (c) 2010-2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
6 * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
7 *
8 * This code is partly based on hid-egalax.c:
9 *
10 * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
11 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
12 * Copyright (c) 2010 Canonical, Ltd.
13 *
14 * This code is partly based on hid-3m-pct.c:
15 *
16 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
17 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
18 * Copyright (c) 2010 Canonical, Ltd.
19 *
20 */
21
22 /*
23 * This program is free software; you can redistribute it and/or modify it
24 * under the terms of the GNU General Public License as published by the Free
25 * Software Foundation; either version 2 of the License, or (at your option)
26 * any later version.
27 */
28
29 #include <linux/device.h>
30 #include <linux/hid.h>
31 #include <linux/module.h>
32 #include <linux/slab.h>
33 #include <linux/usb.h>
34 #include <linux/input/mt.h>
35 #include "usbhid/usbhid.h"
36
37
38 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
39 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
40 MODULE_DESCRIPTION("HID multitouch panels");
41 MODULE_LICENSE("GPL");
42
43 #include "hid-ids.h"
44
45 /* quirks to control the device */
46 #define MT_QUIRK_NOT_SEEN_MEANS_UP (1 << 0)
47 #define MT_QUIRK_SLOT_IS_CONTACTID (1 << 1)
48 #define MT_QUIRK_CYPRESS (1 << 2)
49 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER (1 << 3)
50 #define MT_QUIRK_ALWAYS_VALID (1 << 4)
51 #define MT_QUIRK_VALID_IS_INRANGE (1 << 5)
52 #define MT_QUIRK_VALID_IS_CONFIDENCE (1 << 6)
53 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE (1 << 8)
54
55 struct mt_slot {
56 __s32 x, y, p, w, h;
57 __s32 contactid; /* the device ContactID assigned to this slot */
58 bool touch_state; /* is the touch valid? */
59 bool seen_in_this_frame;/* has this slot been updated */
60 };
61
62 struct mt_class {
63 __s32 name; /* MT_CLS */
64 __s32 quirks;
65 __s32 sn_move; /* Signal/noise ratio for move events */
66 __s32 sn_width; /* Signal/noise ratio for width events */
67 __s32 sn_height; /* Signal/noise ratio for height events */
68 __s32 sn_pressure; /* Signal/noise ratio for pressure events */
69 __u8 maxcontacts;
70 bool is_indirect; /* true for touchpads */
71 };
72
73 struct mt_device {
74 struct mt_slot curdata; /* placeholder of incoming data */
75 struct mt_class mtclass; /* our mt device class */
76 unsigned last_field_index; /* last field index of the report */
77 unsigned last_slot_field; /* the last field of a slot */
78 __s8 inputmode; /* InputMode HID feature, -1 if non-existent */
79 __s8 maxcontact_report_id; /* Maximum Contact Number HID feature,
80 -1 if non-existent */
81 __u8 num_received; /* how many contacts we received */
82 __u8 num_expected; /* expected last contact index */
83 __u8 maxcontacts;
84 __u8 touches_by_report; /* how many touches are present in one report:
85 * 1 means we should use a serial protocol
86 * > 1 means hybrid (multitouch) protocol */
87 bool curvalid; /* is the current contact valid? */
88 struct mt_slot *slots;
89 };
90
91 /* classes of device behavior */
92 #define MT_CLS_DEFAULT 0x0001
93
94 #define MT_CLS_SERIAL 0x0002
95 #define MT_CLS_CONFIDENCE 0x0003
96 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
97 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
98 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
99 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
100 #define MT_CLS_DUAL_NSMU_CONTACTID 0x0008
101 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
102
103 /* vendor specific classes */
104 #define MT_CLS_3M 0x0101
105 #define MT_CLS_CYPRESS 0x0102
106 #define MT_CLS_EGALAX 0x0103
107 #define MT_CLS_EGALAX_SERIAL 0x0104
108 #define MT_CLS_TOPSEED 0x0105
109 #define MT_CLS_PANASONIC 0x0106
110
111 #define MT_DEFAULT_MAXCONTACT 10
112
113 /*
114 * these device-dependent functions determine what slot corresponds
115 * to a valid contact that was just read.
116 */
117
118 static int cypress_compute_slot(struct mt_device *td)
119 {
120 if (td->curdata.contactid != 0 || td->num_received == 0)
121 return td->curdata.contactid;
122 else
123 return -1;
124 }
125
126 static int find_slot_from_contactid(struct mt_device *td)
127 {
128 int i;
129 for (i = 0; i < td->maxcontacts; ++i) {
130 if (td->slots[i].contactid == td->curdata.contactid &&
131 td->slots[i].touch_state)
132 return i;
133 }
134 for (i = 0; i < td->maxcontacts; ++i) {
135 if (!td->slots[i].seen_in_this_frame &&
136 !td->slots[i].touch_state)
137 return i;
138 }
139 /* should not occurs. If this happens that means
140 * that the device sent more touches that it says
141 * in the report descriptor. It is ignored then. */
142 return -1;
143 }
144
145 static struct mt_class mt_classes[] = {
146 { .name = MT_CLS_DEFAULT,
147 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
148 { .name = MT_CLS_SERIAL,
149 .quirks = MT_QUIRK_ALWAYS_VALID},
150 { .name = MT_CLS_CONFIDENCE,
151 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
152 { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
153 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
154 MT_QUIRK_SLOT_IS_CONTACTID },
155 { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
156 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
157 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
158 { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
159 .quirks = MT_QUIRK_VALID_IS_INRANGE |
160 MT_QUIRK_SLOT_IS_CONTACTID,
161 .maxcontacts = 2 },
162 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
163 .quirks = MT_QUIRK_VALID_IS_INRANGE |
164 MT_QUIRK_SLOT_IS_CONTACTNUMBER,
165 .maxcontacts = 2 },
166 { .name = MT_CLS_DUAL_NSMU_CONTACTID,
167 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
168 MT_QUIRK_SLOT_IS_CONTACTID,
169 .maxcontacts = 2 },
170 { .name = MT_CLS_INRANGE_CONTACTNUMBER,
171 .quirks = MT_QUIRK_VALID_IS_INRANGE |
172 MT_QUIRK_SLOT_IS_CONTACTNUMBER },
173
174 /*
175 * vendor specific classes
176 */
177 { .name = MT_CLS_3M,
178 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
179 MT_QUIRK_SLOT_IS_CONTACTID,
180 .sn_move = 2048,
181 .sn_width = 128,
182 .sn_height = 128 },
183 { .name = MT_CLS_CYPRESS,
184 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
185 MT_QUIRK_CYPRESS,
186 .maxcontacts = 10 },
187 { .name = MT_CLS_EGALAX,
188 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
189 MT_QUIRK_VALID_IS_INRANGE,
190 .sn_move = 4096,
191 .sn_pressure = 32,
192 },
193 { .name = MT_CLS_EGALAX_SERIAL,
194 .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
195 MT_QUIRK_ALWAYS_VALID,
196 .sn_move = 4096,
197 .sn_pressure = 32,
198 },
199 { .name = MT_CLS_TOPSEED,
200 .quirks = MT_QUIRK_ALWAYS_VALID,
201 .is_indirect = true,
202 .maxcontacts = 2,
203 },
204 { .name = MT_CLS_PANASONIC,
205 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
206 .maxcontacts = 4 },
207
208 { }
209 };
210
211 static ssize_t mt_show_quirks(struct device *dev,
212 struct device_attribute *attr,
213 char *buf)
214 {
215 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
216 struct mt_device *td = hid_get_drvdata(hdev);
217
218 return sprintf(buf, "%u\n", td->mtclass.quirks);
219 }
220
221 static ssize_t mt_set_quirks(struct device *dev,
222 struct device_attribute *attr,
223 const char *buf, size_t count)
224 {
225 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
226 struct mt_device *td = hid_get_drvdata(hdev);
227
228 unsigned long val;
229
230 if (kstrtoul(buf, 0, &val))
231 return -EINVAL;
232
233 td->mtclass.quirks = val;
234
235 return count;
236 }
237
238 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
239
240 static struct attribute *sysfs_attrs[] = {
241 &dev_attr_quirks.attr,
242 NULL
243 };
244
245 static struct attribute_group mt_attribute_group = {
246 .attrs = sysfs_attrs
247 };
248
249 static void mt_feature_mapping(struct hid_device *hdev,
250 struct hid_field *field, struct hid_usage *usage)
251 {
252 struct mt_device *td = hid_get_drvdata(hdev);
253
254 switch (usage->hid) {
255 case HID_DG_INPUTMODE:
256 td->inputmode = field->report->id;
257 break;
258 case HID_DG_CONTACTMAX:
259 td->maxcontact_report_id = field->report->id;
260 td->maxcontacts = field->value[0];
261 if (td->mtclass.maxcontacts)
262 /* check if the maxcontacts is given by the class */
263 td->maxcontacts = td->mtclass.maxcontacts;
264
265 break;
266 }
267 }
268
269 static void set_abs(struct input_dev *input, unsigned int code,
270 struct hid_field *field, int snratio)
271 {
272 int fmin = field->logical_minimum;
273 int fmax = field->logical_maximum;
274 int fuzz = snratio ? (fmax - fmin) / snratio : 0;
275 input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
276 }
277
278 static void set_last_slot_field(struct hid_usage *usage, struct mt_device *td,
279 struct hid_input *hi)
280 {
281 if (!test_bit(usage->hid, hi->input->absbit))
282 td->last_slot_field = usage->hid;
283 }
284
285 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
286 struct hid_field *field, struct hid_usage *usage,
287 unsigned long **bit, int *max)
288 {
289 struct mt_device *td = hid_get_drvdata(hdev);
290 struct mt_class *cls = &td->mtclass;
291 int code;
292
293 /* Only map fields from TouchScreen or TouchPad collections.
294 * We need to ignore fields that belong to other collections
295 * such as Mouse that might have the same GenericDesktop usages. */
296 if (field->application == HID_DG_TOUCHSCREEN)
297 set_bit(INPUT_PROP_DIRECT, hi->input->propbit);
298 else if (field->application != HID_DG_TOUCHPAD)
299 return 0;
300
301 /* In case of an indirect device (touchpad), we need to add
302 * specific BTN_TOOL_* to be handled by the synaptics xorg
303 * driver.
304 * We also consider that touchscreens providing buttons are touchpads.
305 */
306 if (field->application == HID_DG_TOUCHPAD ||
307 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON ||
308 cls->is_indirect) {
309 set_bit(INPUT_PROP_POINTER, hi->input->propbit);
310 set_bit(BTN_TOOL_FINGER, hi->input->keybit);
311 set_bit(BTN_TOOL_DOUBLETAP, hi->input->keybit);
312 set_bit(BTN_TOOL_TRIPLETAP, hi->input->keybit);
313 set_bit(BTN_TOOL_QUADTAP, hi->input->keybit);
314 }
315
316 /* eGalax devices provide a Digitizer.Stylus input which overrides
317 * the correct Digitizers.Finger X/Y ranges.
318 * Let's just ignore this input. */
319 if (field->physical == HID_DG_STYLUS)
320 return -1;
321
322 switch (usage->hid & HID_USAGE_PAGE) {
323
324 case HID_UP_GENDESK:
325 switch (usage->hid) {
326 case HID_GD_X:
327 hid_map_usage(hi, usage, bit, max,
328 EV_ABS, ABS_MT_POSITION_X);
329 set_abs(hi->input, ABS_MT_POSITION_X, field,
330 cls->sn_move);
331 /* touchscreen emulation */
332 set_abs(hi->input, ABS_X, field, cls->sn_move);
333 set_last_slot_field(usage, td, hi);
334 td->last_field_index = field->index;
335 return 1;
336 case HID_GD_Y:
337 hid_map_usage(hi, usage, bit, max,
338 EV_ABS, ABS_MT_POSITION_Y);
339 set_abs(hi->input, ABS_MT_POSITION_Y, field,
340 cls->sn_move);
341 /* touchscreen emulation */
342 set_abs(hi->input, ABS_Y, field, cls->sn_move);
343 set_last_slot_field(usage, td, hi);
344 td->last_field_index = field->index;
345 return 1;
346 }
347 return 0;
348
349 case HID_UP_DIGITIZER:
350 switch (usage->hid) {
351 case HID_DG_INRANGE:
352 set_last_slot_field(usage, td, hi);
353 td->last_field_index = field->index;
354 return 1;
355 case HID_DG_CONFIDENCE:
356 set_last_slot_field(usage, td, hi);
357 td->last_field_index = field->index;
358 return 1;
359 case HID_DG_TIPSWITCH:
360 hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
361 input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
362 set_last_slot_field(usage, td, hi);
363 td->last_field_index = field->index;
364 return 1;
365 case HID_DG_CONTACTID:
366 if (!td->maxcontacts)
367 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
368 input_mt_init_slots(hi->input, td->maxcontacts);
369 td->last_slot_field = usage->hid;
370 td->last_field_index = field->index;
371 td->touches_by_report++;
372 return 1;
373 case HID_DG_WIDTH:
374 hid_map_usage(hi, usage, bit, max,
375 EV_ABS, ABS_MT_TOUCH_MAJOR);
376 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
377 cls->sn_width);
378 set_last_slot_field(usage, td, hi);
379 td->last_field_index = field->index;
380 return 1;
381 case HID_DG_HEIGHT:
382 hid_map_usage(hi, usage, bit, max,
383 EV_ABS, ABS_MT_TOUCH_MINOR);
384 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
385 cls->sn_height);
386 input_set_abs_params(hi->input,
387 ABS_MT_ORIENTATION, 0, 1, 0, 0);
388 set_last_slot_field(usage, td, hi);
389 td->last_field_index = field->index;
390 return 1;
391 case HID_DG_TIPPRESSURE:
392 hid_map_usage(hi, usage, bit, max,
393 EV_ABS, ABS_MT_PRESSURE);
394 set_abs(hi->input, ABS_MT_PRESSURE, field,
395 cls->sn_pressure);
396 /* touchscreen emulation */
397 set_abs(hi->input, ABS_PRESSURE, field,
398 cls->sn_pressure);
399 set_last_slot_field(usage, td, hi);
400 td->last_field_index = field->index;
401 return 1;
402 case HID_DG_CONTACTCOUNT:
403 td->last_field_index = field->index;
404 return 1;
405 case HID_DG_CONTACTMAX:
406 /* we don't set td->last_slot_field as contactcount and
407 * contact max are global to the report */
408 td->last_field_index = field->index;
409 return -1;
410 }
411 case HID_DG_TOUCH:
412 /* Legacy devices use TIPSWITCH and not TOUCH.
413 * Let's just ignore this field. */
414 return -1;
415 /* let hid-input decide for the others */
416 return 0;
417
418 case HID_UP_BUTTON:
419 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
420 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
421 input_set_capability(hi->input, EV_KEY, code);
422 return 1;
423
424 case 0xff000000:
425 /* we do not want to map these: no input-oriented meaning */
426 return -1;
427 }
428
429 return 0;
430 }
431
432 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
433 struct hid_field *field, struct hid_usage *usage,
434 unsigned long **bit, int *max)
435 {
436 if (usage->type == EV_KEY || usage->type == EV_ABS)
437 set_bit(usage->type, hi->input->evbit);
438
439 return -1;
440 }
441
442 static int mt_compute_slot(struct mt_device *td)
443 {
444 __s32 quirks = td->mtclass.quirks;
445
446 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
447 return td->curdata.contactid;
448
449 if (quirks & MT_QUIRK_CYPRESS)
450 return cypress_compute_slot(td);
451
452 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
453 return td->num_received;
454
455 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
456 return td->curdata.contactid - 1;
457
458 return find_slot_from_contactid(td);
459 }
460
461 /*
462 * this function is called when a whole contact has been processed,
463 * so that it can assign it to a slot and store the data there
464 */
465 static void mt_complete_slot(struct mt_device *td)
466 {
467 td->curdata.seen_in_this_frame = true;
468 if (td->curvalid) {
469 int slotnum = mt_compute_slot(td);
470
471 if (slotnum >= 0 && slotnum < td->maxcontacts)
472 td->slots[slotnum] = td->curdata;
473 }
474 td->num_received++;
475 }
476
477
478 /*
479 * this function is called when a whole packet has been received and processed,
480 * so that it can decide what to send to the input layer.
481 */
482 static void mt_emit_event(struct mt_device *td, struct input_dev *input)
483 {
484 int i;
485
486 for (i = 0; i < td->maxcontacts; ++i) {
487 struct mt_slot *s = &(td->slots[i]);
488 if ((td->mtclass.quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) &&
489 !s->seen_in_this_frame) {
490 s->touch_state = false;
491 }
492
493 input_mt_slot(input, i);
494 input_mt_report_slot_state(input, MT_TOOL_FINGER,
495 s->touch_state);
496 if (s->touch_state) {
497 /* this finger is on the screen */
498 int wide = (s->w > s->h);
499 /* divided by two to match visual scale of touch */
500 int major = max(s->w, s->h) >> 1;
501 int minor = min(s->w, s->h) >> 1;
502
503 input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
504 input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
505 input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
506 input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
507 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
508 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
509 }
510 s->seen_in_this_frame = false;
511
512 }
513
514 input_mt_report_pointer_emulation(input, true);
515 input_sync(input);
516 td->num_received = 0;
517 }
518
519
520
521 static int mt_event(struct hid_device *hid, struct hid_field *field,
522 struct hid_usage *usage, __s32 value)
523 {
524 struct mt_device *td = hid_get_drvdata(hid);
525 __s32 quirks = td->mtclass.quirks;
526
527 if (hid->claimed & HID_CLAIMED_INPUT && td->slots) {
528 switch (usage->hid) {
529 case HID_DG_INRANGE:
530 if (quirks & MT_QUIRK_ALWAYS_VALID)
531 td->curvalid = true;
532 else if (quirks & MT_QUIRK_VALID_IS_INRANGE)
533 td->curvalid = value;
534 break;
535 case HID_DG_TIPSWITCH:
536 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
537 td->curvalid = value;
538 td->curdata.touch_state = value;
539 break;
540 case HID_DG_CONFIDENCE:
541 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
542 td->curvalid = value;
543 break;
544 case HID_DG_CONTACTID:
545 td->curdata.contactid = value;
546 break;
547 case HID_DG_TIPPRESSURE:
548 td->curdata.p = value;
549 break;
550 case HID_GD_X:
551 td->curdata.x = value;
552 break;
553 case HID_GD_Y:
554 td->curdata.y = value;
555 break;
556 case HID_DG_WIDTH:
557 td->curdata.w = value;
558 break;
559 case HID_DG_HEIGHT:
560 td->curdata.h = value;
561 break;
562 case HID_DG_CONTACTCOUNT:
563 /*
564 * Includes multi-packet support where subsequent
565 * packets are sent with zero contactcount.
566 */
567 if (value)
568 td->num_expected = value;
569 break;
570 case HID_DG_TOUCH:
571 /* do nothing */
572 break;
573
574 default:
575 /* fallback to the generic hidinput handling */
576 return 0;
577 }
578
579 if (usage->hid == td->last_slot_field)
580 mt_complete_slot(td);
581
582 if (field->index == td->last_field_index
583 && td->num_received >= td->num_expected)
584 mt_emit_event(td, field->hidinput->input);
585
586 }
587
588 /* we have handled the hidinput part, now remains hiddev */
589 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
590 hid->hiddev_hid_event(hid, field, usage, value);
591
592 return 1;
593 }
594
595 static void mt_set_input_mode(struct hid_device *hdev)
596 {
597 struct mt_device *td = hid_get_drvdata(hdev);
598 struct hid_report *r;
599 struct hid_report_enum *re;
600
601 if (td->inputmode < 0)
602 return;
603
604 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
605 r = re->report_id_hash[td->inputmode];
606 if (r) {
607 r->field[0]->value[0] = 0x02;
608 usbhid_submit_report(hdev, r, USB_DIR_OUT);
609 }
610 }
611
612 static void mt_set_maxcontacts(struct hid_device *hdev)
613 {
614 struct mt_device *td = hid_get_drvdata(hdev);
615 struct hid_report *r;
616 struct hid_report_enum *re;
617 int fieldmax, max;
618
619 if (td->maxcontact_report_id < 0)
620 return;
621
622 if (!td->mtclass.maxcontacts)
623 return;
624
625 re = &hdev->report_enum[HID_FEATURE_REPORT];
626 r = re->report_id_hash[td->maxcontact_report_id];
627 if (r) {
628 max = td->mtclass.maxcontacts;
629 fieldmax = r->field[0]->logical_maximum;
630 max = min(fieldmax, max);
631 if (r->field[0]->value[0] != max) {
632 r->field[0]->value[0] = max;
633 usbhid_submit_report(hdev, r, USB_DIR_OUT);
634 }
635 }
636 }
637
638 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
639 {
640 int ret, i;
641 struct mt_device *td;
642 struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
643
644 if (id) {
645 for (i = 0; mt_classes[i].name ; i++) {
646 if (id->driver_data == mt_classes[i].name) {
647 mtclass = &(mt_classes[i]);
648 break;
649 }
650 }
651 }
652
653 /* This allows the driver to correctly support devices
654 * that emit events over several HID messages.
655 */
656 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
657 hdev->quirks &= ~HID_QUIRK_MULTITOUCH;
658
659 td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
660 if (!td) {
661 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
662 return -ENOMEM;
663 }
664 td->mtclass = *mtclass;
665 td->inputmode = -1;
666 td->maxcontact_report_id = -1;
667 hid_set_drvdata(hdev, td);
668
669 ret = hid_parse(hdev);
670 if (ret != 0)
671 goto fail;
672
673 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
674 if (ret)
675 goto fail;
676
677 if (!id && td->touches_by_report == 1) {
678 /* the device has been sent by hid-generic */
679 mtclass = &td->mtclass;
680 mtclass->quirks |= MT_QUIRK_ALWAYS_VALID;
681 mtclass->quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
682 mtclass->quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
683 mtclass->quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
684 }
685
686 td->slots = kzalloc(td->maxcontacts * sizeof(struct mt_slot),
687 GFP_KERNEL);
688 if (!td->slots) {
689 dev_err(&hdev->dev, "cannot allocate multitouch slots\n");
690 hid_hw_stop(hdev);
691 ret = -ENOMEM;
692 goto fail;
693 }
694
695 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
696
697 mt_set_maxcontacts(hdev);
698 mt_set_input_mode(hdev);
699
700 return 0;
701
702 fail:
703 kfree(td);
704 return ret;
705 }
706
707 #ifdef CONFIG_PM
708 static int mt_reset_resume(struct hid_device *hdev)
709 {
710 mt_set_maxcontacts(hdev);
711 mt_set_input_mode(hdev);
712 return 0;
713 }
714 #endif
715
716 static void mt_remove(struct hid_device *hdev)
717 {
718 struct mt_device *td = hid_get_drvdata(hdev);
719 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
720 hid_hw_stop(hdev);
721 kfree(td->slots);
722 kfree(td);
723 hid_set_drvdata(hdev, NULL);
724 }
725
726 static const struct hid_device_id mt_devices[] = {
727
728 /* 3M panels */
729 { .driver_data = MT_CLS_3M,
730 HID_USB_DEVICE(USB_VENDOR_ID_3M,
731 USB_DEVICE_ID_3M1968) },
732 { .driver_data = MT_CLS_3M,
733 HID_USB_DEVICE(USB_VENDOR_ID_3M,
734 USB_DEVICE_ID_3M2256) },
735 { .driver_data = MT_CLS_3M,
736 HID_USB_DEVICE(USB_VENDOR_ID_3M,
737 USB_DEVICE_ID_3M3266) },
738
739 /* ActionStar panels */
740 { .driver_data = MT_CLS_DEFAULT,
741 HID_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
742 USB_DEVICE_ID_ACTIONSTAR_1011) },
743
744 /* Atmel panels */
745 { .driver_data = MT_CLS_SERIAL,
746 HID_USB_DEVICE(USB_VENDOR_ID_ATMEL,
747 USB_DEVICE_ID_ATMEL_MULTITOUCH) },
748 { .driver_data = MT_CLS_SERIAL,
749 HID_USB_DEVICE(USB_VENDOR_ID_ATMEL,
750 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
751
752 /* Cando panels */
753 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
754 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
755 USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
756 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
757 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
758 USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
759 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
760 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
761 USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
762 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
763 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
764 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
765
766 /* Chunghwa Telecom touch panels */
767 { .driver_data = MT_CLS_DEFAULT,
768 HID_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
769 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
770
771 /* CVTouch panels */
772 { .driver_data = MT_CLS_DEFAULT,
773 HID_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
774 USB_DEVICE_ID_CVTOUCH_SCREEN) },
775
776 /* Cypress panel */
777 { .driver_data = MT_CLS_CYPRESS,
778 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
779 USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
780
781 /* eGalax devices (resistive) */
782 { .driver_data = MT_CLS_EGALAX,
783 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
784 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
785 { .driver_data = MT_CLS_EGALAX,
786 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
787 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
788
789 /* eGalax devices (capacitive) */
790 { .driver_data = MT_CLS_EGALAX,
791 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
792 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
793 { .driver_data = MT_CLS_EGALAX_SERIAL,
794 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
795 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
796 { .driver_data = MT_CLS_EGALAX_SERIAL,
797 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
798 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
799 { .driver_data = MT_CLS_EGALAX_SERIAL,
800 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
801 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
802 { .driver_data = MT_CLS_EGALAX_SERIAL,
803 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
804 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
805 { .driver_data = MT_CLS_EGALAX,
806 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
807 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
808 { .driver_data = MT_CLS_EGALAX_SERIAL,
809 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
810 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
811 { .driver_data = MT_CLS_EGALAX,
812 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
813 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
814 { .driver_data = MT_CLS_EGALAX_SERIAL,
815 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
816 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
817 { .driver_data = MT_CLS_EGALAX,
818 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
819 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
820 { .driver_data = MT_CLS_EGALAX,
821 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
822 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
823 { .driver_data = MT_CLS_EGALAX_SERIAL,
824 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
825 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
826 { .driver_data = MT_CLS_EGALAX_SERIAL,
827 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
828 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
829
830 /* Elo TouchSystems IntelliTouch Plus panel */
831 { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID,
832 HID_USB_DEVICE(USB_VENDOR_ID_ELO,
833 USB_DEVICE_ID_ELO_TS2515) },
834
835 /* GeneralTouch panel */
836 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
837 HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
838 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
839
840 /* Gametel game controller */
841 { .driver_data = MT_CLS_DEFAULT,
842 HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_FRUCTEL,
843 USB_DEVICE_ID_GAMETEL_MT_MODE) },
844
845 /* GoodTouch panels */
846 { .driver_data = MT_CLS_DEFAULT,
847 HID_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
848 USB_DEVICE_ID_GOODTOUCH_000f) },
849
850 /* Hanvon panels */
851 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
852 HID_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
853 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
854
855 /* Ideacom panel */
856 { .driver_data = MT_CLS_SERIAL,
857 HID_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
858 USB_DEVICE_ID_IDEACOM_IDC6650) },
859 { .driver_data = MT_CLS_SERIAL,
860 HID_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
861 USB_DEVICE_ID_IDEACOM_IDC6651) },
862
863 /* Ilitek dual touch panel */
864 { .driver_data = MT_CLS_DEFAULT,
865 HID_USB_DEVICE(USB_VENDOR_ID_ILITEK,
866 USB_DEVICE_ID_ILITEK_MULTITOUCH) },
867
868 /* IRTOUCH panels */
869 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
870 HID_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
871 USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
872
873 /* LG Display panels */
874 { .driver_data = MT_CLS_DEFAULT,
875 HID_USB_DEVICE(USB_VENDOR_ID_LG,
876 USB_DEVICE_ID_LG_MULTITOUCH) },
877
878 /* Lumio panels */
879 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
880 HID_USB_DEVICE(USB_VENDOR_ID_LUMIO,
881 USB_DEVICE_ID_CRYSTALTOUCH) },
882 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
883 HID_USB_DEVICE(USB_VENDOR_ID_LUMIO,
884 USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
885
886 /* MosArt panels */
887 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
888 HID_USB_DEVICE(USB_VENDOR_ID_ASUS,
889 USB_DEVICE_ID_ASUS_T91MT)},
890 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
891 HID_USB_DEVICE(USB_VENDOR_ID_ASUS,
892 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
893 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
894 HID_USB_DEVICE(USB_VENDOR_ID_TURBOX,
895 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
896
897 /* Panasonic panels */
898 { .driver_data = MT_CLS_PANASONIC,
899 HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
900 USB_DEVICE_ID_PANABOARD_UBT780) },
901 { .driver_data = MT_CLS_PANASONIC,
902 HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
903 USB_DEVICE_ID_PANABOARD_UBT880) },
904
905 /* PenMount panels */
906 { .driver_data = MT_CLS_CONFIDENCE,
907 HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
908 USB_DEVICE_ID_PENMOUNT_PCI) },
909
910 /* PixArt optical touch screen */
911 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
912 HID_USB_DEVICE(USB_VENDOR_ID_PIXART,
913 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
914 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
915 HID_USB_DEVICE(USB_VENDOR_ID_PIXART,
916 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
917 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
918 HID_USB_DEVICE(USB_VENDOR_ID_PIXART,
919 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
920
921 /* PixCir-based panels */
922 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
923 HID_USB_DEVICE(USB_VENDOR_ID_HANVON,
924 USB_DEVICE_ID_HANVON_MULTITOUCH) },
925 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
926 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
927 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
928
929 /* Quanta-based panels */
930 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
931 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
932 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
933 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
934 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
935 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
936 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
937 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
938 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
939
940 /* Stantum panels */
941 { .driver_data = MT_CLS_CONFIDENCE,
942 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM,
943 USB_DEVICE_ID_MTP)},
944 { .driver_data = MT_CLS_CONFIDENCE,
945 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
946 USB_DEVICE_ID_MTP_STM)},
947 { .driver_data = MT_CLS_CONFIDENCE,
948 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
949 USB_DEVICE_ID_MTP_SITRONIX)},
950
951 /* TopSeed panels */
952 { .driver_data = MT_CLS_TOPSEED,
953 HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
954 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
955
956 /* Touch International panels */
957 { .driver_data = MT_CLS_DEFAULT,
958 HID_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
959 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
960
961 /* Unitec panels */
962 { .driver_data = MT_CLS_DEFAULT,
963 HID_USB_DEVICE(USB_VENDOR_ID_UNITEC,
964 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
965 { .driver_data = MT_CLS_DEFAULT,
966 HID_USB_DEVICE(USB_VENDOR_ID_UNITEC,
967 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
968 /* XAT */
969 { .driver_data = MT_CLS_DEFAULT,
970 HID_USB_DEVICE(USB_VENDOR_ID_XAT,
971 USB_DEVICE_ID_XAT_CSR) },
972
973 /* Xiroku */
974 { .driver_data = MT_CLS_DEFAULT,
975 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
976 USB_DEVICE_ID_XIROKU_SPX) },
977 { .driver_data = MT_CLS_DEFAULT,
978 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
979 USB_DEVICE_ID_XIROKU_MPX) },
980 { .driver_data = MT_CLS_DEFAULT,
981 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
982 USB_DEVICE_ID_XIROKU_CSR) },
983 { .driver_data = MT_CLS_DEFAULT,
984 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
985 USB_DEVICE_ID_XIROKU_SPX1) },
986 { .driver_data = MT_CLS_DEFAULT,
987 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
988 USB_DEVICE_ID_XIROKU_MPX1) },
989 { .driver_data = MT_CLS_DEFAULT,
990 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
991 USB_DEVICE_ID_XIROKU_CSR1) },
992 { .driver_data = MT_CLS_DEFAULT,
993 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
994 USB_DEVICE_ID_XIROKU_SPX2) },
995 { .driver_data = MT_CLS_DEFAULT,
996 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
997 USB_DEVICE_ID_XIROKU_MPX2) },
998 { .driver_data = MT_CLS_DEFAULT,
999 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1000 USB_DEVICE_ID_XIROKU_CSR2) },
1001
1002 { }
1003 };
1004 MODULE_DEVICE_TABLE(hid, mt_devices);
1005
1006 static const struct hid_usage_id mt_grabbed_usages[] = {
1007 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1008 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1009 };
1010
1011 static struct hid_driver mt_driver = {
1012 .name = "hid-multitouch",
1013 .id_table = mt_devices,
1014 .probe = mt_probe,
1015 .remove = mt_remove,
1016 .input_mapping = mt_input_mapping,
1017 .input_mapped = mt_input_mapped,
1018 .feature_mapping = mt_feature_mapping,
1019 .usage_table = mt_grabbed_usages,
1020 .event = mt_event,
1021 #ifdef CONFIG_PM
1022 .reset_resume = mt_reset_resume,
1023 #endif
1024 };
1025
1026 static int __init mt_init(void)
1027 {
1028 return hid_register_driver(&mt_driver);
1029 }
1030
1031 static void __exit mt_exit(void)
1032 {
1033 hid_unregister_driver(&mt_driver);
1034 }
1035
1036 module_init(mt_init);
1037 module_exit(mt_exit);
Linux with added FPC-III support