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Linux/drivers/hid/hid-multitouch.c

  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/usb.h>
 46 #include <linux/input/mt.h>
 47 #include <linux/string.h>
 48 
 49 
 50 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
 51 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
 52 MODULE_DESCRIPTION("HID multitouch panels");
 53 MODULE_LICENSE("GPL");
 54 
 55 #include "hid-ids.h"
 56 
 57 /* quirks to control the device */
 58 #define MT_QUIRK_NOT_SEEN_MEANS_UP      (1 << 0)
 59 #define MT_QUIRK_SLOT_IS_CONTACTID      (1 << 1)
 60 #define MT_QUIRK_CYPRESS                (1 << 2)
 61 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  (1 << 3)
 62 #define MT_QUIRK_ALWAYS_VALID           (1 << 4)
 63 #define MT_QUIRK_VALID_IS_INRANGE       (1 << 5)
 64 #define MT_QUIRK_VALID_IS_CONFIDENCE    (1 << 6)
 65 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    (1 << 8)
 66 #define MT_QUIRK_NO_AREA                (1 << 9)
 67 #define MT_QUIRK_IGNORE_DUPLICATES      (1 << 10)
 68 #define MT_QUIRK_HOVERING               (1 << 11)
 69 #define MT_QUIRK_CONTACT_CNT_ACCURATE   (1 << 12)
 70 
 71 #define MT_INPUTMODE_TOUCHSCREEN        0x02
 72 #define MT_INPUTMODE_TOUCHPAD           0x03
 73 
 74 struct mt_slot {
 75         __s32 x, y, cx, cy, p, w, h;
 76         __s32 contactid;        /* the device ContactID assigned to this slot */
 77         bool touch_state;       /* is the touch valid? */
 78         bool inrange_state;     /* is the finger in proximity of the sensor? */
 79 };
 80 
 81 struct mt_class {
 82         __s32 name;     /* MT_CLS */
 83         __s32 quirks;
 84         __s32 sn_move;  /* Signal/noise ratio for move events */
 85         __s32 sn_width; /* Signal/noise ratio for width events */
 86         __s32 sn_height;        /* Signal/noise ratio for height events */
 87         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
 88         __u8 maxcontacts;
 89         bool is_indirect;       /* true for touchpads */
 90         bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
 91 };
 92 
 93 struct mt_fields {
 94         unsigned usages[HID_MAX_FIELDS];
 95         unsigned int length;
 96 };
 97 
 98 struct mt_device {
 99         struct mt_slot curdata; /* placeholder of incoming data */
100         struct mt_class mtclass;        /* our mt device class */
101         struct mt_fields *fields;       /* temporary placeholder for storing the
102                                            multitouch fields */
103         int cc_index;   /* contact count field index in the report */
104         int cc_value_index;     /* contact count value index in the field */
105         unsigned last_slot_field;       /* the last field of a slot */
106         unsigned mt_report_id;  /* the report ID of the multitouch device */
107         __s16 inputmode;        /* InputMode HID feature, -1 if non-existent */
108         __s16 inputmode_index;  /* InputMode HID feature index in the report */
109         __s16 maxcontact_report_id;     /* Maximum Contact Number HID feature,
110                                    -1 if non-existent */
111         __u8 inputmode_value;  /* InputMode HID feature value */
112         __u8 num_received;      /* how many contacts we received */
113         __u8 num_expected;      /* expected last contact index */
114         __u8 maxcontacts;
115         __u8 touches_by_report; /* how many touches are present in one report:
116                                 * 1 means we should use a serial protocol
117                                 * > 1 means hybrid (multitouch) protocol */
118         bool serial_maybe;      /* need to check for serial protocol */
119         bool curvalid;          /* is the current contact valid? */
120         unsigned mt_flags;      /* flags to pass to input-mt */
121 };
122 
123 static void mt_post_parse_default_settings(struct mt_device *td);
124 static void mt_post_parse(struct mt_device *td);
125 
126 /* classes of device behavior */
127 #define MT_CLS_DEFAULT                          0x0001
128 
129 #define MT_CLS_SERIAL                           0x0002
130 #define MT_CLS_CONFIDENCE                       0x0003
131 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
132 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
133 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
134 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
135 /* reserved                                     0x0008 */
136 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
137 #define MT_CLS_NSMU                             0x000a
138 /* reserved                                     0x0010 */
139 /* reserved                                     0x0011 */
140 #define MT_CLS_WIN_8                            0x0012
141 #define MT_CLS_EXPORT_ALL_INPUTS                0x0013
142 
143 /* vendor specific classes */
144 #define MT_CLS_3M                               0x0101
145 /* reserved                                     0x0102 */
146 #define MT_CLS_EGALAX                           0x0103
147 #define MT_CLS_EGALAX_SERIAL                    0x0104
148 #define MT_CLS_TOPSEED                          0x0105
149 #define MT_CLS_PANASONIC                        0x0106
150 #define MT_CLS_FLATFROG                         0x0107
151 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
152 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
153 
154 #define MT_DEFAULT_MAXCONTACT   10
155 #define MT_MAX_MAXCONTACT       250
156 
157 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
158 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
159 
160 /*
161  * these device-dependent functions determine what slot corresponds
162  * to a valid contact that was just read.
163  */
164 
165 static int cypress_compute_slot(struct mt_device *td)
166 {
167         if (td->curdata.contactid != 0 || td->num_received == 0)
168                 return td->curdata.contactid;
169         else
170                 return -1;
171 }
172 
173 static struct mt_class mt_classes[] = {
174         { .name = MT_CLS_DEFAULT,
175                 .quirks = MT_QUIRK_ALWAYS_VALID |
176                         MT_QUIRK_CONTACT_CNT_ACCURATE },
177         { .name = MT_CLS_NSMU,
178                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
179         { .name = MT_CLS_SERIAL,
180                 .quirks = MT_QUIRK_ALWAYS_VALID},
181         { .name = MT_CLS_CONFIDENCE,
182                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
183         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
184                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
185                         MT_QUIRK_SLOT_IS_CONTACTID },
186         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
187                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
188                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
189         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
190                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
191                         MT_QUIRK_SLOT_IS_CONTACTID,
192                 .maxcontacts = 2 },
193         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
194                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
195                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
196                 .maxcontacts = 2 },
197         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
198                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
199                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
200         { .name = MT_CLS_WIN_8,
201                 .quirks = MT_QUIRK_ALWAYS_VALID |
202                         MT_QUIRK_IGNORE_DUPLICATES |
203                         MT_QUIRK_HOVERING |
204                         MT_QUIRK_CONTACT_CNT_ACCURATE },
205         { .name = MT_CLS_EXPORT_ALL_INPUTS,
206                 .quirks = MT_QUIRK_ALWAYS_VALID |
207                         MT_QUIRK_CONTACT_CNT_ACCURATE,
208                 .export_all_inputs = true },
209 
210         /*
211          * vendor specific classes
212          */
213         { .name = MT_CLS_3M,
214                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
215                         MT_QUIRK_SLOT_IS_CONTACTID,
216                 .sn_move = 2048,
217                 .sn_width = 128,
218                 .sn_height = 128,
219                 .maxcontacts = 60,
220         },
221         { .name = MT_CLS_EGALAX,
222                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
223                         MT_QUIRK_VALID_IS_INRANGE,
224                 .sn_move = 4096,
225                 .sn_pressure = 32,
226         },
227         { .name = MT_CLS_EGALAX_SERIAL,
228                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
229                         MT_QUIRK_ALWAYS_VALID,
230                 .sn_move = 4096,
231                 .sn_pressure = 32,
232         },
233         { .name = MT_CLS_TOPSEED,
234                 .quirks = MT_QUIRK_ALWAYS_VALID,
235                 .is_indirect = true,
236                 .maxcontacts = 2,
237         },
238         { .name = MT_CLS_PANASONIC,
239                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
240                 .maxcontacts = 4 },
241         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
242                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
243                         MT_QUIRK_VALID_IS_INRANGE |
244                         MT_QUIRK_SLOT_IS_CONTACTID,
245                 .maxcontacts = 2
246         },
247         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
248                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
249                         MT_QUIRK_SLOT_IS_CONTACTID
250         },
251 
252         { .name = MT_CLS_FLATFROG,
253                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
254                         MT_QUIRK_NO_AREA,
255                 .sn_move = 2048,
256                 .maxcontacts = 40,
257         },
258         { }
259 };
260 
261 static ssize_t mt_show_quirks(struct device *dev,
262                            struct device_attribute *attr,
263                            char *buf)
264 {
265         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
266         struct mt_device *td = hid_get_drvdata(hdev);
267 
268         return sprintf(buf, "%u\n", td->mtclass.quirks);
269 }
270 
271 static ssize_t mt_set_quirks(struct device *dev,
272                           struct device_attribute *attr,
273                           const char *buf, size_t count)
274 {
275         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
276         struct mt_device *td = hid_get_drvdata(hdev);
277 
278         unsigned long val;
279 
280         if (kstrtoul(buf, 0, &val))
281                 return -EINVAL;
282 
283         td->mtclass.quirks = val;
284 
285         if (td->cc_index < 0)
286                 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
287 
288         return count;
289 }
290 
291 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
292 
293 static struct attribute *sysfs_attrs[] = {
294         &dev_attr_quirks.attr,
295         NULL
296 };
297 
298 static struct attribute_group mt_attribute_group = {
299         .attrs = sysfs_attrs
300 };
301 
302 static void mt_feature_mapping(struct hid_device *hdev,
303                 struct hid_field *field, struct hid_usage *usage)
304 {
305         struct mt_device *td = hid_get_drvdata(hdev);
306 
307         switch (usage->hid) {
308         case HID_DG_INPUTMODE:
309                 /* Ignore if value index is out of bounds. */
310                 if (usage->usage_index >= field->report_count) {
311                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
312                         break;
313                 }
314 
315                 td->inputmode = field->report->id;
316                 td->inputmode_index = usage->usage_index;
317 
318                 break;
319         case HID_DG_CONTACTMAX:
320                 td->maxcontact_report_id = field->report->id;
321                 td->maxcontacts = field->value[0];
322                 if (!td->maxcontacts &&
323                     field->logical_maximum <= MT_MAX_MAXCONTACT)
324                         td->maxcontacts = field->logical_maximum;
325                 if (td->mtclass.maxcontacts)
326                         /* check if the maxcontacts is given by the class */
327                         td->maxcontacts = td->mtclass.maxcontacts;
328 
329                 break;
330         }
331 }
332 
333 static void set_abs(struct input_dev *input, unsigned int code,
334                 struct hid_field *field, int snratio)
335 {
336         int fmin = field->logical_minimum;
337         int fmax = field->logical_maximum;
338         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
339         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
340         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
341 }
342 
343 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
344                 struct hid_input *hi)
345 {
346         struct mt_fields *f = td->fields;
347 
348         if (f->length >= HID_MAX_FIELDS)
349                 return;
350 
351         f->usages[f->length++] = usage->hid;
352 }
353 
354 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
355                 struct hid_field *field, struct hid_usage *usage,
356                 unsigned long **bit, int *max)
357 {
358         struct mt_device *td = hid_get_drvdata(hdev);
359         struct mt_class *cls = &td->mtclass;
360         int code;
361         struct hid_usage *prev_usage = NULL;
362 
363         if (field->application == HID_DG_TOUCHSCREEN)
364                 td->mt_flags |= INPUT_MT_DIRECT;
365 
366         /*
367          * Model touchscreens providing buttons as touchpads.
368          */
369         if (field->application == HID_DG_TOUCHPAD ||
370             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
371                 td->mt_flags |= INPUT_MT_POINTER;
372                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
373         }
374 
375         if (usage->usage_index)
376                 prev_usage = &field->usage[usage->usage_index - 1];
377 
378         switch (usage->hid & HID_USAGE_PAGE) {
379 
380         case HID_UP_GENDESK:
381                 switch (usage->hid) {
382                 case HID_GD_X:
383                         if (prev_usage && (prev_usage->hid == usage->hid)) {
384                                 hid_map_usage(hi, usage, bit, max,
385                                         EV_ABS, ABS_MT_TOOL_X);
386                                 set_abs(hi->input, ABS_MT_TOOL_X, field,
387                                         cls->sn_move);
388                         } else {
389                                 hid_map_usage(hi, usage, bit, max,
390                                         EV_ABS, ABS_MT_POSITION_X);
391                                 set_abs(hi->input, ABS_MT_POSITION_X, field,
392                                         cls->sn_move);
393                         }
394 
395                         mt_store_field(usage, td, hi);
396                         return 1;
397                 case HID_GD_Y:
398                         if (prev_usage && (prev_usage->hid == usage->hid)) {
399                                 hid_map_usage(hi, usage, bit, max,
400                                         EV_ABS, ABS_MT_TOOL_Y);
401                                 set_abs(hi->input, ABS_MT_TOOL_Y, field,
402                                         cls->sn_move);
403                         } else {
404                                 hid_map_usage(hi, usage, bit, max,
405                                         EV_ABS, ABS_MT_POSITION_Y);
406                                 set_abs(hi->input, ABS_MT_POSITION_Y, field,
407                                         cls->sn_move);
408                         }
409 
410                         mt_store_field(usage, td, hi);
411                         return 1;
412                 }
413                 return 0;
414 
415         case HID_UP_DIGITIZER:
416                 switch (usage->hid) {
417                 case HID_DG_INRANGE:
418                         if (cls->quirks & MT_QUIRK_HOVERING) {
419                                 hid_map_usage(hi, usage, bit, max,
420                                         EV_ABS, ABS_MT_DISTANCE);
421                                 input_set_abs_params(hi->input,
422                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
423                         }
424                         mt_store_field(usage, td, hi);
425                         return 1;
426                 case HID_DG_CONFIDENCE:
427                         mt_store_field(usage, td, hi);
428                         return 1;
429                 case HID_DG_TIPSWITCH:
430                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
431                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
432                         mt_store_field(usage, td, hi);
433                         return 1;
434                 case HID_DG_CONTACTID:
435                         mt_store_field(usage, td, hi);
436                         td->touches_by_report++;
437                         td->mt_report_id = field->report->id;
438                         return 1;
439                 case HID_DG_WIDTH:
440                         hid_map_usage(hi, usage, bit, max,
441                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
442                         if (!(cls->quirks & MT_QUIRK_NO_AREA))
443                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
444                                         cls->sn_width);
445                         mt_store_field(usage, td, hi);
446                         return 1;
447                 case HID_DG_HEIGHT:
448                         hid_map_usage(hi, usage, bit, max,
449                                         EV_ABS, ABS_MT_TOUCH_MINOR);
450                         if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
451                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
452                                         cls->sn_height);
453                                 input_set_abs_params(hi->input,
454                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
455                         }
456                         mt_store_field(usage, td, hi);
457                         return 1;
458                 case HID_DG_TIPPRESSURE:
459                         hid_map_usage(hi, usage, bit, max,
460                                         EV_ABS, ABS_MT_PRESSURE);
461                         set_abs(hi->input, ABS_MT_PRESSURE, field,
462                                 cls->sn_pressure);
463                         mt_store_field(usage, td, hi);
464                         return 1;
465                 case HID_DG_CONTACTCOUNT:
466                         /* Ignore if indexes are out of bounds. */
467                         if (field->index >= field->report->maxfield ||
468                             usage->usage_index >= field->report_count)
469                                 return 1;
470                         td->cc_index = field->index;
471                         td->cc_value_index = usage->usage_index;
472                         return 1;
473                 case HID_DG_CONTACTMAX:
474                         /* we don't set td->last_slot_field as contactcount and
475                          * contact max are global to the report */
476                         return -1;
477                 case HID_DG_TOUCH:
478                         /* Legacy devices use TIPSWITCH and not TOUCH.
479                          * Let's just ignore this field. */
480                         return -1;
481                 }
482                 /* let hid-input decide for the others */
483                 return 0;
484 
485         case HID_UP_BUTTON:
486                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
487                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
488                 input_set_capability(hi->input, EV_KEY, code);
489                 return 1;
490 
491         case 0xff000000:
492                 /* we do not want to map these: no input-oriented meaning */
493                 return -1;
494         }
495 
496         return 0;
497 }
498 
499 static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
500                 struct hid_field *field, struct hid_usage *usage,
501                 unsigned long **bit, int *max)
502 {
503         if (usage->type == EV_KEY || usage->type == EV_ABS)
504                 set_bit(usage->type, hi->input->evbit);
505 
506         return -1;
507 }
508 
509 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
510 {
511         __s32 quirks = td->mtclass.quirks;
512 
513         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
514                 return td->curdata.contactid;
515 
516         if (quirks & MT_QUIRK_CYPRESS)
517                 return cypress_compute_slot(td);
518 
519         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
520                 return td->num_received;
521 
522         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
523                 return td->curdata.contactid - 1;
524 
525         return input_mt_get_slot_by_key(input, td->curdata.contactid);
526 }
527 
528 /*
529  * this function is called when a whole contact has been processed,
530  * so that it can assign it to a slot and store the data there
531  */
532 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
533 {
534         if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
535             td->num_received >= td->num_expected)
536                 return;
537 
538         if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
539                 int slotnum = mt_compute_slot(td, input);
540                 struct mt_slot *s = &td->curdata;
541                 struct input_mt *mt = input->mt;
542 
543                 if (slotnum < 0 || slotnum >= td->maxcontacts)
544                         return;
545 
546                 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
547                         struct input_mt_slot *slot = &mt->slots[slotnum];
548                         if (input_mt_is_active(slot) &&
549                             input_mt_is_used(mt, slot))
550                                 return;
551                 }
552 
553                 input_mt_slot(input, slotnum);
554                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
555                         s->touch_state || s->inrange_state);
556                 if (s->touch_state || s->inrange_state) {
557                         /* this finger is in proximity of the sensor */
558                         int wide = (s->w > s->h);
559                         /* divided by two to match visual scale of touch */
560                         int major = max(s->w, s->h) >> 1;
561                         int minor = min(s->w, s->h) >> 1;
562 
563                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
564                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
565                         input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
566                         input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
567                         input_event(input, EV_ABS, ABS_MT_DISTANCE,
568                                 !s->touch_state);
569                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
570                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
571                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
572                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
573                 }
574         }
575 
576         td->num_received++;
577 }
578 
579 /*
580  * this function is called when a whole packet has been received and processed,
581  * so that it can decide what to send to the input layer.
582  */
583 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
584 {
585         input_mt_sync_frame(input);
586         input_sync(input);
587         td->num_received = 0;
588 }
589 
590 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
591                                 struct hid_usage *usage, __s32 value)
592 {
593         /* we will handle the hidinput part later, now remains hiddev */
594         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
595                 hid->hiddev_hid_event(hid, field, usage, value);
596 
597         return 1;
598 }
599 
600 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
601                                 struct hid_usage *usage, __s32 value)
602 {
603         struct mt_device *td = hid_get_drvdata(hid);
604         __s32 quirks = td->mtclass.quirks;
605         struct input_dev *input = field->hidinput->input;
606 
607         if (hid->claimed & HID_CLAIMED_INPUT) {
608                 switch (usage->hid) {
609                 case HID_DG_INRANGE:
610                         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
611                                 td->curvalid = value;
612                         if (quirks & MT_QUIRK_HOVERING)
613                                 td->curdata.inrange_state = value;
614                         break;
615                 case HID_DG_TIPSWITCH:
616                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
617                                 td->curvalid = value;
618                         td->curdata.touch_state = value;
619                         break;
620                 case HID_DG_CONFIDENCE:
621                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
622                                 td->curvalid = value;
623                         break;
624                 case HID_DG_CONTACTID:
625                         td->curdata.contactid = value;
626                         break;
627                 case HID_DG_TIPPRESSURE:
628                         td->curdata.p = value;
629                         break;
630                 case HID_GD_X:
631                         if (usage->code == ABS_MT_TOOL_X)
632                                 td->curdata.cx = value;
633                         else
634                                 td->curdata.x = value;
635                         break;
636                 case HID_GD_Y:
637                         if (usage->code == ABS_MT_TOOL_Y)
638                                 td->curdata.cy = value;
639                         else
640                                 td->curdata.y = value;
641                         break;
642                 case HID_DG_WIDTH:
643                         td->curdata.w = value;
644                         break;
645                 case HID_DG_HEIGHT:
646                         td->curdata.h = value;
647                         break;
648                 case HID_DG_CONTACTCOUNT:
649                         break;
650                 case HID_DG_TOUCH:
651                         /* do nothing */
652                         break;
653 
654                 default:
655                         if (usage->type)
656                                 input_event(input, usage->type, usage->code,
657                                                 value);
658                         return;
659                 }
660 
661                 if (usage->usage_index + 1 == field->report_count) {
662                         /* we only take into account the last report. */
663                         if (usage->hid == td->last_slot_field)
664                                 mt_complete_slot(td, field->hidinput->input);
665                 }
666 
667         }
668 }
669 
670 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
671 {
672         struct mt_device *td = hid_get_drvdata(hid);
673         struct hid_field *field;
674         unsigned count;
675         int r, n;
676 
677         /*
678          * Includes multi-packet support where subsequent
679          * packets are sent with zero contactcount.
680          */
681         if (td->cc_index >= 0) {
682                 struct hid_field *field = report->field[td->cc_index];
683                 int value = field->value[td->cc_value_index];
684                 if (value)
685                         td->num_expected = value;
686         }
687 
688         for (r = 0; r < report->maxfield; r++) {
689                 field = report->field[r];
690                 count = field->report_count;
691 
692                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
693                         continue;
694 
695                 for (n = 0; n < count; n++)
696                         mt_process_mt_event(hid, field, &field->usage[n],
697                                         field->value[n]);
698         }
699 
700         if (td->num_received >= td->num_expected)
701                 mt_sync_frame(td, report->field[0]->hidinput->input);
702 }
703 
704 static void mt_touch_input_configured(struct hid_device *hdev,
705                                         struct hid_input *hi)
706 {
707         struct mt_device *td = hid_get_drvdata(hdev);
708         struct mt_class *cls = &td->mtclass;
709         struct input_dev *input = hi->input;
710 
711         if (!td->maxcontacts)
712                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
713 
714         mt_post_parse(td);
715         if (td->serial_maybe)
716                 mt_post_parse_default_settings(td);
717 
718         if (cls->is_indirect)
719                 td->mt_flags |= INPUT_MT_POINTER;
720 
721         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
722                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
723 
724         input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
725 
726         td->mt_flags = 0;
727 }
728 
729 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
730                 struct hid_field *field, struct hid_usage *usage,
731                 unsigned long **bit, int *max)
732 {
733         struct mt_device *td = hid_get_drvdata(hdev);
734 
735         /*
736          * If mtclass.export_all_inputs is not set, only map fields from
737          * TouchScreen or TouchPad collections. We need to ignore fields
738          * that belong to other collections such as Mouse that might have
739          * the same GenericDesktop usages.
740          */
741         if (!td->mtclass.export_all_inputs &&
742             field->application != HID_DG_TOUCHSCREEN &&
743             field->application != HID_DG_PEN &&
744             field->application != HID_DG_TOUCHPAD)
745                 return -1;
746 
747         /*
748          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
749          * for the stylus.
750          */
751         if (field->physical == HID_DG_STYLUS)
752                 return 0;
753 
754         if (field->application == HID_DG_TOUCHSCREEN ||
755             field->application == HID_DG_TOUCHPAD)
756                 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
757 
758         /* let hid-core decide for the others */
759         return 0;
760 }
761 
762 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
763                 struct hid_field *field, struct hid_usage *usage,
764                 unsigned long **bit, int *max)
765 {
766         /*
767          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
768          * for the stylus.
769          */
770         if (field->physical == HID_DG_STYLUS)
771                 return 0;
772 
773         if (field->application == HID_DG_TOUCHSCREEN ||
774             field->application == HID_DG_TOUCHPAD)
775                 return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
776 
777         /* let hid-core decide for the others */
778         return 0;
779 }
780 
781 static int mt_event(struct hid_device *hid, struct hid_field *field,
782                                 struct hid_usage *usage, __s32 value)
783 {
784         struct mt_device *td = hid_get_drvdata(hid);
785 
786         if (field->report->id == td->mt_report_id)
787                 return mt_touch_event(hid, field, usage, value);
788 
789         return 0;
790 }
791 
792 static void mt_report(struct hid_device *hid, struct hid_report *report)
793 {
794         struct mt_device *td = hid_get_drvdata(hid);
795         struct hid_field *field = report->field[0];
796 
797         if (!(hid->claimed & HID_CLAIMED_INPUT))
798                 return;
799 
800         if (report->id == td->mt_report_id)
801                 return mt_touch_report(hid, report);
802 
803         if (field && field->hidinput && field->hidinput->input)
804                 input_sync(field->hidinput->input);
805 }
806 
807 static void mt_set_input_mode(struct hid_device *hdev)
808 {
809         struct mt_device *td = hid_get_drvdata(hdev);
810         struct hid_report *r;
811         struct hid_report_enum *re;
812 
813         if (td->inputmode < 0)
814                 return;
815 
816         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
817         r = re->report_id_hash[td->inputmode];
818         if (r) {
819                 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
820                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
821         }
822 }
823 
824 static void mt_set_maxcontacts(struct hid_device *hdev)
825 {
826         struct mt_device *td = hid_get_drvdata(hdev);
827         struct hid_report *r;
828         struct hid_report_enum *re;
829         int fieldmax, max;
830 
831         if (td->maxcontact_report_id < 0)
832                 return;
833 
834         if (!td->mtclass.maxcontacts)
835                 return;
836 
837         re = &hdev->report_enum[HID_FEATURE_REPORT];
838         r = re->report_id_hash[td->maxcontact_report_id];
839         if (r) {
840                 max = td->mtclass.maxcontacts;
841                 fieldmax = r->field[0]->logical_maximum;
842                 max = min(fieldmax, max);
843                 if (r->field[0]->value[0] != max) {
844                         r->field[0]->value[0] = max;
845                         hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
846                 }
847         }
848 }
849 
850 static void mt_post_parse_default_settings(struct mt_device *td)
851 {
852         __s32 quirks = td->mtclass.quirks;
853 
854         /* unknown serial device needs special quirks */
855         if (td->touches_by_report == 1) {
856                 quirks |= MT_QUIRK_ALWAYS_VALID;
857                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
858                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
859                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
860                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
861         }
862 
863         td->mtclass.quirks = quirks;
864 }
865 
866 static void mt_post_parse(struct mt_device *td)
867 {
868         struct mt_fields *f = td->fields;
869         struct mt_class *cls = &td->mtclass;
870 
871         if (td->touches_by_report > 0) {
872                 int field_count_per_touch = f->length / td->touches_by_report;
873                 td->last_slot_field = f->usages[field_count_per_touch - 1];
874         }
875 
876         if (td->cc_index < 0)
877                 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
878 }
879 
880 static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
881 {
882         struct mt_device *td = hid_get_drvdata(hdev);
883         char *name;
884         const char *suffix = NULL;
885         struct hid_field *field = hi->report->field[0];
886 
887         if (hi->report->id == td->mt_report_id)
888                 mt_touch_input_configured(hdev, hi);
889 
890         /*
891          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
892          * for the stylus. Check this first, and then rely on the application
893          * field.
894          */
895         if (hi->report->field[0]->physical == HID_DG_STYLUS) {
896                 suffix = "Pen";
897                 /* force BTN_STYLUS to allow tablet matching in udev */
898                 __set_bit(BTN_STYLUS, hi->input->keybit);
899         } else {
900                 switch (field->application) {
901                 case HID_GD_KEYBOARD:
902                         suffix = "Keyboard";
903                         break;
904                 case HID_GD_KEYPAD:
905                         suffix = "Keypad";
906                         break;
907                 case HID_GD_MOUSE:
908                         suffix = "Mouse";
909                         break;
910                 case HID_DG_STYLUS:
911                         suffix = "Pen";
912                         /* force BTN_STYLUS to allow tablet matching in udev */
913                         __set_bit(BTN_STYLUS, hi->input->keybit);
914                         break;
915                 case HID_DG_TOUCHSCREEN:
916                         /* we do not set suffix = "Touchscreen" */
917                         break;
918                 case HID_GD_SYSTEM_CONTROL:
919                         suffix = "System Control";
920                         break;
921                 case HID_CP_CONSUMER_CONTROL:
922                         suffix = "Consumer Control";
923                         break;
924                 default:
925                         suffix = "UNKNOWN";
926                         break;
927                 }
928         }
929 
930         if (suffix) {
931                 name = devm_kzalloc(&hi->input->dev,
932                                     strlen(hdev->name) + strlen(suffix) + 2,
933                                     GFP_KERNEL);
934                 if (name) {
935                         sprintf(name, "%s %s", hdev->name, suffix);
936                         hi->input->name = name;
937                 }
938         }
939 }
940 
941 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
942 {
943         int ret, i;
944         struct mt_device *td;
945         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
946 
947         for (i = 0; mt_classes[i].name ; i++) {
948                 if (id->driver_data == mt_classes[i].name) {
949                         mtclass = &(mt_classes[i]);
950                         break;
951                 }
952         }
953 
954         /* This allows the driver to correctly support devices
955          * that emit events over several HID messages.
956          */
957         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
958 
959         /*
960          * This allows the driver to handle different input sensors
961          * that emits events through different reports on the same HID
962          * device.
963          */
964         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
965         hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
966 
967         /*
968          * Handle special quirks for Windows 8 certified devices.
969          */
970         if (id->group == HID_GROUP_MULTITOUCH_WIN_8)
971                 /*
972                  * Some multitouch screens do not like to be polled for input
973                  * reports. Fortunately, the Win8 spec says that all touches
974                  * should be sent during each report, making the initialization
975                  * of input reports unnecessary.
976                  */
977                 hdev->quirks |= HID_QUIRK_NO_INIT_INPUT_REPORTS;
978 
979         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
980         if (!td) {
981                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
982                 return -ENOMEM;
983         }
984         td->mtclass = *mtclass;
985         td->inputmode = -1;
986         td->maxcontact_report_id = -1;
987         td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
988         td->cc_index = -1;
989         td->mt_report_id = -1;
990         hid_set_drvdata(hdev, td);
991 
992         td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
993                                   GFP_KERNEL);
994         if (!td->fields) {
995                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
996                 return -ENOMEM;
997         }
998 
999         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1000                 td->serial_maybe = true;
1001 
1002         ret = hid_parse(hdev);
1003         if (ret != 0)
1004                 return ret;
1005 
1006         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1007         if (ret)
1008                 return ret;
1009 
1010         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1011 
1012         mt_set_maxcontacts(hdev);
1013         mt_set_input_mode(hdev);
1014 
1015         /* release .fields memory as it is not used anymore */
1016         devm_kfree(&hdev->dev, td->fields);
1017         td->fields = NULL;
1018 
1019         return 0;
1020 }
1021 
1022 #ifdef CONFIG_PM
1023 static int mt_reset_resume(struct hid_device *hdev)
1024 {
1025         mt_set_maxcontacts(hdev);
1026         mt_set_input_mode(hdev);
1027         return 0;
1028 }
1029 
1030 static int mt_resume(struct hid_device *hdev)
1031 {
1032         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1033          * It should be safe to send it to other devices too.
1034          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1035 
1036         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1037 
1038         return 0;
1039 }
1040 #endif
1041 
1042 static void mt_remove(struct hid_device *hdev)
1043 {
1044         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1045         hid_hw_stop(hdev);
1046 }
1047 
1048 /*
1049  * This list contains only:
1050  * - VID/PID of products not working with the default multitouch handling
1051  * - 2 generic rules.
1052  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1053  */
1054 static const struct hid_device_id mt_devices[] = {
1055 
1056         /* 3M panels */
1057         { .driver_data = MT_CLS_3M,
1058                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1059                         USB_DEVICE_ID_3M1968) },
1060         { .driver_data = MT_CLS_3M,
1061                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1062                         USB_DEVICE_ID_3M2256) },
1063         { .driver_data = MT_CLS_3M,
1064                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1065                         USB_DEVICE_ID_3M3266) },
1066 
1067         /* Anton devices */
1068         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1069                 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1070                         USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1071 
1072         /* Atmel panels */
1073         { .driver_data = MT_CLS_SERIAL,
1074                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1075                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1076 
1077         /* Baanto multitouch devices */
1078         { .driver_data = MT_CLS_NSMU,
1079                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1080                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1081 
1082         /* Cando panels */
1083         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1084                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1085                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1086         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1087                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1088                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1089 
1090         /* Chunghwa Telecom touch panels */
1091         {  .driver_data = MT_CLS_NSMU,
1092                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1093                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1094 
1095         /* CVTouch panels */
1096         { .driver_data = MT_CLS_NSMU,
1097                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1098                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1099 
1100         /* eGalax devices (resistive) */
1101         { .driver_data = MT_CLS_EGALAX,
1102                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1103                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1104         { .driver_data = MT_CLS_EGALAX,
1105                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1106                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1107 
1108         /* eGalax devices (capacitive) */
1109         { .driver_data = MT_CLS_EGALAX_SERIAL,
1110                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1111                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1112         { .driver_data = MT_CLS_EGALAX,
1113                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1114                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1115         { .driver_data = MT_CLS_EGALAX_SERIAL,
1116                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1117                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1118         { .driver_data = MT_CLS_EGALAX_SERIAL,
1119                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1120                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1121         { .driver_data = MT_CLS_EGALAX_SERIAL,
1122                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1123                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1124         { .driver_data = MT_CLS_EGALAX_SERIAL,
1125                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1126                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1127         { .driver_data = MT_CLS_EGALAX,
1128                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1129                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1130         { .driver_data = MT_CLS_EGALAX,
1131                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1132                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1133         { .driver_data = MT_CLS_EGALAX_SERIAL,
1134                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1135                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1136         { .driver_data = MT_CLS_EGALAX,
1137                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1138                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1139         { .driver_data = MT_CLS_EGALAX,
1140                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1141                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1142         { .driver_data = MT_CLS_EGALAX,
1143                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1144                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1145         { .driver_data = MT_CLS_EGALAX,
1146                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1147                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1148         { .driver_data = MT_CLS_EGALAX_SERIAL,
1149                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1150                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1151         { .driver_data = MT_CLS_EGALAX_SERIAL,
1152                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1153                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1154         { .driver_data = MT_CLS_EGALAX_SERIAL,
1155                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1156                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1157 
1158         /* Elitegroup panel */
1159         { .driver_data = MT_CLS_SERIAL,
1160                 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1161                         USB_DEVICE_ID_ELITEGROUP_05D8) },
1162 
1163         /* Flatfrog Panels */
1164         { .driver_data = MT_CLS_FLATFROG,
1165                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1166                         USB_DEVICE_ID_MULTITOUCH_3200) },
1167 
1168         /* FocalTech Panels */
1169         { .driver_data = MT_CLS_SERIAL,
1170                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1171                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1172 
1173         /* GeneralTouch panel */
1174         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1175                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1176                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1177         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1178                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1179                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1180         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1181                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1182                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1183         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1184                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1185                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1186         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1187                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1188                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1189         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1190                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1191                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1192         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1193                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1194                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1195 
1196         /* Gametel game controller */
1197         { .driver_data = MT_CLS_NSMU,
1198                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1199                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1200 
1201         /* GoodTouch panels */
1202         { .driver_data = MT_CLS_NSMU,
1203                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1204                         USB_DEVICE_ID_GOODTOUCH_000f) },
1205 
1206         /* Hanvon panels */
1207         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1208                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1209                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1210 
1211         /* Ilitek dual touch panel */
1212         {  .driver_data = MT_CLS_NSMU,
1213                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1214                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1215 
1216         /* MosArt panels */
1217         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1218                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1219                         USB_DEVICE_ID_ASUS_T91MT)},
1220         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1221                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1222                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1223         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1224                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1225                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1226 
1227         /* Panasonic panels */
1228         { .driver_data = MT_CLS_PANASONIC,
1229                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1230                         USB_DEVICE_ID_PANABOARD_UBT780) },
1231         { .driver_data = MT_CLS_PANASONIC,
1232                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1233                         USB_DEVICE_ID_PANABOARD_UBT880) },
1234 
1235         /* Novatek Panel */
1236         { .driver_data = MT_CLS_NSMU,
1237                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1238                         USB_DEVICE_ID_NOVATEK_PCT) },
1239 
1240         /* PixArt optical touch screen */
1241         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1242                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1243                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1244         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1245                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1246                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1247         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1248                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1249                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1250 
1251         /* PixCir-based panels */
1252         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1253                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1254                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1255 
1256         /* Quanta-based panels */
1257         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1258                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1259                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1260 
1261         /* Stantum panels */
1262         { .driver_data = MT_CLS_CONFIDENCE,
1263                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1264                         USB_DEVICE_ID_MTP_STM)},
1265 
1266         /* TopSeed panels */
1267         { .driver_data = MT_CLS_TOPSEED,
1268                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1269                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1270 
1271         /* Touch International panels */
1272         { .driver_data = MT_CLS_NSMU,
1273                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1274                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1275 
1276         /* Unitec panels */
1277         { .driver_data = MT_CLS_NSMU,
1278                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1279                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1280         { .driver_data = MT_CLS_NSMU,
1281                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1282                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1283 
1284         /* Wistron panels */
1285         { .driver_data = MT_CLS_NSMU,
1286                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1287                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1288 
1289         /* XAT */
1290         { .driver_data = MT_CLS_NSMU,
1291                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1292                         USB_DEVICE_ID_XAT_CSR) },
1293 
1294         /* Xiroku */
1295         { .driver_data = MT_CLS_NSMU,
1296                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1297                         USB_DEVICE_ID_XIROKU_SPX) },
1298         { .driver_data = MT_CLS_NSMU,
1299                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1300                         USB_DEVICE_ID_XIROKU_MPX) },
1301         { .driver_data = MT_CLS_NSMU,
1302                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1303                         USB_DEVICE_ID_XIROKU_CSR) },
1304         { .driver_data = MT_CLS_NSMU,
1305                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1306                         USB_DEVICE_ID_XIROKU_SPX1) },
1307         { .driver_data = MT_CLS_NSMU,
1308                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1309                         USB_DEVICE_ID_XIROKU_MPX1) },
1310         { .driver_data = MT_CLS_NSMU,
1311                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1312                         USB_DEVICE_ID_XIROKU_CSR1) },
1313         { .driver_data = MT_CLS_NSMU,
1314                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1315                         USB_DEVICE_ID_XIROKU_SPX2) },
1316         { .driver_data = MT_CLS_NSMU,
1317                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1318                         USB_DEVICE_ID_XIROKU_MPX2) },
1319         { .driver_data = MT_CLS_NSMU,
1320                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1321                         USB_DEVICE_ID_XIROKU_CSR2) },
1322 
1323         /* Generic MT device */
1324         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1325 
1326         /* Generic Win 8 certified MT device */
1327         {  .driver_data = MT_CLS_WIN_8,
1328                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1329                         HID_ANY_ID, HID_ANY_ID) },
1330         { }
1331 };
1332 MODULE_DEVICE_TABLE(hid, mt_devices);
1333 
1334 static const struct hid_usage_id mt_grabbed_usages[] = {
1335         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1336         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1337 };
1338 
1339 static struct hid_driver mt_driver = {
1340         .name = "hid-multitouch",
1341         .id_table = mt_devices,
1342         .probe = mt_probe,
1343         .remove = mt_remove,
1344         .input_mapping = mt_input_mapping,
1345         .input_mapped = mt_input_mapped,
1346         .input_configured = mt_input_configured,
1347         .feature_mapping = mt_feature_mapping,
1348         .usage_table = mt_grabbed_usages,
1349         .event = mt_event,
1350         .report = mt_report,
1351 #ifdef CONFIG_PM
1352         .reset_resume = mt_reset_resume,
1353         .resume = mt_resume,
1354 #endif
1355 };
1356 module_hid_driver(mt_driver);
1357 

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