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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/input/mt.h>
 46 #include <linux/string.h>
 47 
 48 
 49 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
 50 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
 51 MODULE_DESCRIPTION("HID multitouch panels");
 52 MODULE_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 
 76 struct 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 
 83 struct 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 
 95 struct mt_fields {
 96         unsigned usages[HID_MAX_FIELDS];
 97         unsigned int length;
 98 };
 99 
100 struct 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 
127 static void mt_post_parse_default_settings(struct mt_device *td);
128 static 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 
170 static 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 
178 static 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 
271 static ssize_t mt_show_quirks(struct device *dev,
272                            struct device_attribute *attr,
273                            char *buf)
274 {
275         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
276         struct mt_device *td = hid_get_drvdata(hdev);
277 
278         return sprintf(buf, "%u\n", td->mtclass.quirks);
279 }
280 
281 static 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 = container_of(dev, struct 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 
301 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
302 
303 static struct attribute *sysfs_attrs[] = {
304         &dev_attr_quirks.attr,
305         NULL
306 };
307 
308 static struct attribute_group mt_attribute_group = {
309         .attrs = sysfs_attrs
310 };
311 
312 static void mt_feature_mapping(struct hid_device *hdev,
313                 struct hid_field *field, struct hid_usage *usage)
314 {
315         struct mt_device *td = hid_get_drvdata(hdev);
316 
317         switch (usage->hid) {
318         case HID_DG_INPUTMODE:
319                 /* Ignore if value index is out of bounds. */
320                 if (usage->usage_index >= field->report_count) {
321                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
322                         break;
323                 }
324 
325                 td->inputmode = field->report->id;
326                 td->inputmode_index = usage->usage_index;
327 
328                 break;
329         case HID_DG_CONTACTMAX:
330                 td->maxcontact_report_id = field->report->id;
331                 td->maxcontacts = field->value[0];
332                 if (!td->maxcontacts &&
333                     field->logical_maximum <= MT_MAX_MAXCONTACT)
334                         td->maxcontacts = field->logical_maximum;
335                 if (td->mtclass.maxcontacts)
336                         /* check if the maxcontacts is given by the class */
337                         td->maxcontacts = td->mtclass.maxcontacts;
338 
339                 break;
340         case HID_DG_BUTTONTYPE:
341                 if (usage->usage_index >= field->report_count) {
342                         dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
343                         break;
344                 }
345 
346                 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
347                         td->is_buttonpad = true;
348 
349                 break;
350         }
351 }
352 
353 static void set_abs(struct input_dev *input, unsigned int code,
354                 struct hid_field *field, int snratio)
355 {
356         int fmin = field->logical_minimum;
357         int fmax = field->logical_maximum;
358         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
359         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
360         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
361 }
362 
363 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
364                 struct hid_input *hi)
365 {
366         struct mt_fields *f = td->fields;
367 
368         if (f->length >= HID_MAX_FIELDS)
369                 return;
370 
371         f->usages[f->length++] = usage->hid;
372 }
373 
374 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
375                 struct hid_field *field, struct hid_usage *usage,
376                 unsigned long **bit, int *max)
377 {
378         struct mt_device *td = hid_get_drvdata(hdev);
379         struct mt_class *cls = &td->mtclass;
380         int code;
381         struct hid_usage *prev_usage = NULL;
382 
383         if (field->application == HID_DG_TOUCHSCREEN)
384                 td->mt_flags |= INPUT_MT_DIRECT;
385 
386         /*
387          * Model touchscreens providing buttons as touchpads.
388          */
389         if (field->application == HID_DG_TOUCHPAD ||
390             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
391                 td->mt_flags |= INPUT_MT_POINTER;
392                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
393         }
394 
395         /* count the buttons on touchpads */
396         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
397                 td->buttons_count++;
398 
399         if (usage->usage_index)
400                 prev_usage = &field->usage[usage->usage_index - 1];
401 
402         switch (usage->hid & HID_USAGE_PAGE) {
403 
404         case HID_UP_GENDESK:
405                 switch (usage->hid) {
406                 case HID_GD_X:
407                         if (prev_usage && (prev_usage->hid == usage->hid)) {
408                                 hid_map_usage(hi, usage, bit, max,
409                                         EV_ABS, ABS_MT_TOOL_X);
410                                 set_abs(hi->input, ABS_MT_TOOL_X, field,
411                                         cls->sn_move);
412                         } else {
413                                 hid_map_usage(hi, usage, bit, max,
414                                         EV_ABS, ABS_MT_POSITION_X);
415                                 set_abs(hi->input, ABS_MT_POSITION_X, field,
416                                         cls->sn_move);
417                         }
418 
419                         mt_store_field(usage, td, hi);
420                         return 1;
421                 case HID_GD_Y:
422                         if (prev_usage && (prev_usage->hid == usage->hid)) {
423                                 hid_map_usage(hi, usage, bit, max,
424                                         EV_ABS, ABS_MT_TOOL_Y);
425                                 set_abs(hi->input, ABS_MT_TOOL_Y, field,
426                                         cls->sn_move);
427                         } else {
428                                 hid_map_usage(hi, usage, bit, max,
429                                         EV_ABS, ABS_MT_POSITION_Y);
430                                 set_abs(hi->input, ABS_MT_POSITION_Y, field,
431                                         cls->sn_move);
432                         }
433 
434                         mt_store_field(usage, td, hi);
435                         return 1;
436                 }
437                 return 0;
438 
439         case HID_UP_DIGITIZER:
440                 switch (usage->hid) {
441                 case HID_DG_INRANGE:
442                         if (cls->quirks & MT_QUIRK_HOVERING) {
443                                 hid_map_usage(hi, usage, bit, max,
444                                         EV_ABS, ABS_MT_DISTANCE);
445                                 input_set_abs_params(hi->input,
446                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
447                         }
448                         mt_store_field(usage, td, hi);
449                         return 1;
450                 case HID_DG_CONFIDENCE:
451                         mt_store_field(usage, td, hi);
452                         return 1;
453                 case HID_DG_TIPSWITCH:
454                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
455                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
456                         mt_store_field(usage, td, hi);
457                         return 1;
458                 case HID_DG_CONTACTID:
459                         mt_store_field(usage, td, hi);
460                         td->touches_by_report++;
461                         td->mt_report_id = field->report->id;
462                         return 1;
463                 case HID_DG_WIDTH:
464                         hid_map_usage(hi, usage, bit, max,
465                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
466                         if (!(cls->quirks & MT_QUIRK_NO_AREA))
467                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
468                                         cls->sn_width);
469                         mt_store_field(usage, td, hi);
470                         return 1;
471                 case HID_DG_HEIGHT:
472                         hid_map_usage(hi, usage, bit, max,
473                                         EV_ABS, ABS_MT_TOUCH_MINOR);
474                         if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
475                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
476                                         cls->sn_height);
477                                 input_set_abs_params(hi->input,
478                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
479                         }
480                         mt_store_field(usage, td, hi);
481                         return 1;
482                 case HID_DG_TIPPRESSURE:
483                         hid_map_usage(hi, usage, bit, max,
484                                         EV_ABS, ABS_MT_PRESSURE);
485                         set_abs(hi->input, ABS_MT_PRESSURE, field,
486                                 cls->sn_pressure);
487                         mt_store_field(usage, td, hi);
488                         return 1;
489                 case HID_DG_CONTACTCOUNT:
490                         /* Ignore if indexes are out of bounds. */
491                         if (field->index >= field->report->maxfield ||
492                             usage->usage_index >= field->report_count)
493                                 return 1;
494                         td->cc_index = field->index;
495                         td->cc_value_index = usage->usage_index;
496                         return 1;
497                 case HID_DG_CONTACTMAX:
498                         /* we don't set td->last_slot_field as contactcount and
499                          * contact max are global to the report */
500                         return -1;
501                 case HID_DG_TOUCH:
502                         /* Legacy devices use TIPSWITCH and not TOUCH.
503                          * Let's just ignore this field. */
504                         return -1;
505                 }
506                 /* let hid-input decide for the others */
507                 return 0;
508 
509         case HID_UP_BUTTON:
510                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
511                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
512                 input_set_capability(hi->input, EV_KEY, code);
513                 return 1;
514 
515         case 0xff000000:
516                 /* we do not want to map these: no input-oriented meaning */
517                 return -1;
518         }
519 
520         return 0;
521 }
522 
523 static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
524                 struct hid_field *field, struct hid_usage *usage,
525                 unsigned long **bit, int *max)
526 {
527         if (usage->type == EV_KEY || usage->type == EV_ABS)
528                 set_bit(usage->type, hi->input->evbit);
529 
530         return -1;
531 }
532 
533 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
534 {
535         __s32 quirks = td->mtclass.quirks;
536 
537         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
538                 return td->curdata.contactid;
539 
540         if (quirks & MT_QUIRK_CYPRESS)
541                 return cypress_compute_slot(td);
542 
543         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
544                 return td->num_received;
545 
546         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
547                 return td->curdata.contactid - 1;
548 
549         return input_mt_get_slot_by_key(input, td->curdata.contactid);
550 }
551 
552 /*
553  * this function is called when a whole contact has been processed,
554  * so that it can assign it to a slot and store the data there
555  */
556 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
557 {
558         if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
559             td->num_received >= td->num_expected)
560                 return;
561 
562         if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
563                 int slotnum = mt_compute_slot(td, input);
564                 struct mt_slot *s = &td->curdata;
565                 struct input_mt *mt = input->mt;
566 
567                 if (slotnum < 0 || slotnum >= td->maxcontacts)
568                         return;
569 
570                 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
571                         struct input_mt_slot *slot = &mt->slots[slotnum];
572                         if (input_mt_is_active(slot) &&
573                             input_mt_is_used(mt, slot))
574                                 return;
575                 }
576 
577                 input_mt_slot(input, slotnum);
578                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
579                         s->touch_state || s->inrange_state);
580                 if (s->touch_state || s->inrange_state) {
581                         /* this finger is in proximity of the sensor */
582                         int wide = (s->w > s->h);
583                         /* divided by two to match visual scale of touch */
584                         int major = max(s->w, s->h) >> 1;
585                         int minor = min(s->w, s->h) >> 1;
586 
587                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
588                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
589                         input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
590                         input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
591                         input_event(input, EV_ABS, ABS_MT_DISTANCE,
592                                 !s->touch_state);
593                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
594                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
595                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
596                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
597                 }
598         }
599 
600         td->num_received++;
601 }
602 
603 /*
604  * this function is called when a whole packet has been received and processed,
605  * so that it can decide what to send to the input layer.
606  */
607 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
608 {
609         input_mt_sync_frame(input);
610         input_sync(input);
611         td->num_received = 0;
612 }
613 
614 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
615                                 struct hid_usage *usage, __s32 value)
616 {
617         /* we will handle the hidinput part later, now remains hiddev */
618         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
619                 hid->hiddev_hid_event(hid, field, usage, value);
620 
621         return 1;
622 }
623 
624 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
625                                 struct hid_usage *usage, __s32 value)
626 {
627         struct mt_device *td = hid_get_drvdata(hid);
628         __s32 quirks = td->mtclass.quirks;
629         struct input_dev *input = field->hidinput->input;
630 
631         if (hid->claimed & HID_CLAIMED_INPUT) {
632                 switch (usage->hid) {
633                 case HID_DG_INRANGE:
634                         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
635                                 td->curvalid = value;
636                         if (quirks & MT_QUIRK_HOVERING)
637                                 td->curdata.inrange_state = value;
638                         break;
639                 case HID_DG_TIPSWITCH:
640                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
641                                 td->curvalid = value;
642                         td->curdata.touch_state = value;
643                         break;
644                 case HID_DG_CONFIDENCE:
645                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
646                                 td->curvalid = value;
647                         break;
648                 case HID_DG_CONTACTID:
649                         td->curdata.contactid = value;
650                         break;
651                 case HID_DG_TIPPRESSURE:
652                         td->curdata.p = value;
653                         break;
654                 case HID_GD_X:
655                         if (usage->code == ABS_MT_TOOL_X)
656                                 td->curdata.cx = value;
657                         else
658                                 td->curdata.x = value;
659                         break;
660                 case HID_GD_Y:
661                         if (usage->code == ABS_MT_TOOL_Y)
662                                 td->curdata.cy = value;
663                         else
664                                 td->curdata.y = value;
665                         break;
666                 case HID_DG_WIDTH:
667                         td->curdata.w = value;
668                         break;
669                 case HID_DG_HEIGHT:
670                         td->curdata.h = value;
671                         break;
672                 case HID_DG_CONTACTCOUNT:
673                         break;
674                 case HID_DG_TOUCH:
675                         /* do nothing */
676                         break;
677 
678                 default:
679                         if (usage->type)
680                                 input_event(input, usage->type, usage->code,
681                                                 value);
682                         return;
683                 }
684 
685                 if (usage->usage_index + 1 == field->report_count) {
686                         /* we only take into account the last report. */
687                         if (usage->hid == td->last_slot_field)
688                                 mt_complete_slot(td, field->hidinput->input);
689                 }
690 
691         }
692 }
693 
694 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
695 {
696         struct mt_device *td = hid_get_drvdata(hid);
697         struct hid_field *field;
698         unsigned count;
699         int r, n;
700 
701         /*
702          * Includes multi-packet support where subsequent
703          * packets are sent with zero contactcount.
704          */
705         if (td->cc_index >= 0) {
706                 struct hid_field *field = report->field[td->cc_index];
707                 int value = field->value[td->cc_value_index];
708                 if (value)
709                         td->num_expected = value;
710         }
711 
712         for (r = 0; r < report->maxfield; r++) {
713                 field = report->field[r];
714                 count = field->report_count;
715 
716                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
717                         continue;
718 
719                 for (n = 0; n < count; n++)
720                         mt_process_mt_event(hid, field, &field->usage[n],
721                                         field->value[n]);
722         }
723 
724         if (td->num_received >= td->num_expected)
725                 mt_sync_frame(td, report->field[0]->hidinput->input);
726 }
727 
728 static void mt_touch_input_configured(struct hid_device *hdev,
729                                         struct hid_input *hi)
730 {
731         struct mt_device *td = hid_get_drvdata(hdev);
732         struct mt_class *cls = &td->mtclass;
733         struct input_dev *input = hi->input;
734 
735         if (!td->maxcontacts)
736                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
737 
738         mt_post_parse(td);
739         if (td->serial_maybe)
740                 mt_post_parse_default_settings(td);
741 
742         if (cls->is_indirect)
743                 td->mt_flags |= INPUT_MT_POINTER;
744 
745         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
746                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
747 
748         /* check for clickpads */
749         if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
750                 td->is_buttonpad = true;
751 
752         if (td->is_buttonpad)
753                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
754 
755         input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
756 
757         td->mt_flags = 0;
758 }
759 
760 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
761                 struct hid_field *field, struct hid_usage *usage,
762                 unsigned long **bit, int *max)
763 {
764         struct mt_device *td = hid_get_drvdata(hdev);
765 
766         /*
767          * If mtclass.export_all_inputs is not set, only map fields from
768          * TouchScreen or TouchPad collections. We need to ignore fields
769          * that belong to other collections such as Mouse that might have
770          * the same GenericDesktop usages.
771          */
772         if (!td->mtclass.export_all_inputs &&
773             field->application != HID_DG_TOUCHSCREEN &&
774             field->application != HID_DG_PEN &&
775             field->application != HID_DG_TOUCHPAD)
776                 return -1;
777 
778         /*
779          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
780          * for the stylus.
781          */
782         if (field->physical == HID_DG_STYLUS)
783                 return 0;
784 
785         if (field->application == HID_DG_TOUCHSCREEN ||
786             field->application == HID_DG_TOUCHPAD)
787                 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
788 
789         /* let hid-core decide for the others */
790         return 0;
791 }
792 
793 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
794                 struct hid_field *field, struct hid_usage *usage,
795                 unsigned long **bit, int *max)
796 {
797         /*
798          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
799          * for the stylus.
800          */
801         if (field->physical == HID_DG_STYLUS)
802                 return 0;
803 
804         if (field->application == HID_DG_TOUCHSCREEN ||
805             field->application == HID_DG_TOUCHPAD)
806                 return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
807 
808         /* let hid-core decide for the others */
809         return 0;
810 }
811 
812 static int mt_event(struct hid_device *hid, struct hid_field *field,
813                                 struct hid_usage *usage, __s32 value)
814 {
815         struct mt_device *td = hid_get_drvdata(hid);
816 
817         if (field->report->id == td->mt_report_id)
818                 return mt_touch_event(hid, field, usage, value);
819 
820         return 0;
821 }
822 
823 static void mt_report(struct hid_device *hid, struct hid_report *report)
824 {
825         struct mt_device *td = hid_get_drvdata(hid);
826         struct hid_field *field = report->field[0];
827 
828         if (!(hid->claimed & HID_CLAIMED_INPUT))
829                 return;
830 
831         if (report->id == td->mt_report_id)
832                 return mt_touch_report(hid, report);
833 
834         if (field && field->hidinput && field->hidinput->input)
835                 input_sync(field->hidinput->input);
836 }
837 
838 static void mt_set_input_mode(struct hid_device *hdev)
839 {
840         struct mt_device *td = hid_get_drvdata(hdev);
841         struct hid_report *r;
842         struct hid_report_enum *re;
843         struct mt_class *cls = &td->mtclass;
844         char *buf;
845         int report_len;
846 
847         if (td->inputmode < 0)
848                 return;
849 
850         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
851         r = re->report_id_hash[td->inputmode];
852         if (r) {
853                 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
854                         report_len = hid_report_len(r);
855                         buf = hid_alloc_report_buf(r, GFP_KERNEL);
856                         if (!buf) {
857                                 hid_err(hdev, "failed to allocate buffer for report\n");
858                                 return;
859                         }
860                         hid_hw_raw_request(hdev, r->id, buf, report_len,
861                                            HID_FEATURE_REPORT,
862                                            HID_REQ_GET_REPORT);
863                         kfree(buf);
864                 }
865                 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
866                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
867         }
868 }
869 
870 static void mt_set_maxcontacts(struct hid_device *hdev)
871 {
872         struct mt_device *td = hid_get_drvdata(hdev);
873         struct hid_report *r;
874         struct hid_report_enum *re;
875         int fieldmax, max;
876 
877         if (td->maxcontact_report_id < 0)
878                 return;
879 
880         if (!td->mtclass.maxcontacts)
881                 return;
882 
883         re = &hdev->report_enum[HID_FEATURE_REPORT];
884         r = re->report_id_hash[td->maxcontact_report_id];
885         if (r) {
886                 max = td->mtclass.maxcontacts;
887                 fieldmax = r->field[0]->logical_maximum;
888                 max = min(fieldmax, max);
889                 if (r->field[0]->value[0] != max) {
890                         r->field[0]->value[0] = max;
891                         hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
892                 }
893         }
894 }
895 
896 static void mt_post_parse_default_settings(struct mt_device *td)
897 {
898         __s32 quirks = td->mtclass.quirks;
899 
900         /* unknown serial device needs special quirks */
901         if (td->touches_by_report == 1) {
902                 quirks |= MT_QUIRK_ALWAYS_VALID;
903                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
904                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
905                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
906                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
907         }
908 
909         td->mtclass.quirks = quirks;
910 }
911 
912 static void mt_post_parse(struct mt_device *td)
913 {
914         struct mt_fields *f = td->fields;
915         struct mt_class *cls = &td->mtclass;
916 
917         if (td->touches_by_report > 0) {
918                 int field_count_per_touch = f->length / td->touches_by_report;
919                 td->last_slot_field = f->usages[field_count_per_touch - 1];
920         }
921 
922         if (td->cc_index < 0)
923                 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
924 }
925 
926 static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
927 {
928         struct mt_device *td = hid_get_drvdata(hdev);
929         char *name;
930         const char *suffix = NULL;
931         struct hid_field *field = hi->report->field[0];
932 
933         if (hi->report->id == td->mt_report_id)
934                 mt_touch_input_configured(hdev, hi);
935 
936         /*
937          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
938          * for the stylus. Check this first, and then rely on the application
939          * field.
940          */
941         if (hi->report->field[0]->physical == HID_DG_STYLUS) {
942                 suffix = "Pen";
943                 /* force BTN_STYLUS to allow tablet matching in udev */
944                 __set_bit(BTN_STYLUS, hi->input->keybit);
945         } else {
946                 switch (field->application) {
947                 case HID_GD_KEYBOARD:
948                         suffix = "Keyboard";
949                         break;
950                 case HID_GD_KEYPAD:
951                         suffix = "Keypad";
952                         break;
953                 case HID_GD_MOUSE:
954                         suffix = "Mouse";
955                         break;
956                 case HID_DG_STYLUS:
957                         suffix = "Pen";
958                         /* force BTN_STYLUS to allow tablet matching in udev */
959                         __set_bit(BTN_STYLUS, hi->input->keybit);
960                         break;
961                 case HID_DG_TOUCHSCREEN:
962                         /* we do not set suffix = "Touchscreen" */
963                         break;
964                 case HID_GD_SYSTEM_CONTROL:
965                         suffix = "System Control";
966                         break;
967                 case HID_CP_CONSUMER_CONTROL:
968                         suffix = "Consumer Control";
969                         break;
970                 default:
971                         suffix = "UNKNOWN";
972                         break;
973                 }
974         }
975 
976         if (suffix) {
977                 name = devm_kzalloc(&hi->input->dev,
978                                     strlen(hdev->name) + strlen(suffix) + 2,
979                                     GFP_KERNEL);
980                 if (name) {
981                         sprintf(name, "%s %s", hdev->name, suffix);
982                         hi->input->name = name;
983                 }
984         }
985 }
986 
987 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
988 {
989         int ret, i;
990         struct mt_device *td;
991         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
992 
993         for (i = 0; mt_classes[i].name ; i++) {
994                 if (id->driver_data == mt_classes[i].name) {
995                         mtclass = &(mt_classes[i]);
996                         break;
997                 }
998         }
999 
1000         /* This allows the driver to correctly support devices
1001          * that emit events over several HID messages.
1002          */
1003         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1004 
1005         /*
1006          * This allows the driver to handle different input sensors
1007          * that emits events through different reports on the same HID
1008          * device.
1009          */
1010         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1011         hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
1012 
1013         /*
1014          * Handle special quirks for Windows 8 certified devices.
1015          */
1016         if (id->group == HID_GROUP_MULTITOUCH_WIN_8)
1017                 /*
1018                  * Some multitouch screens do not like to be polled for input
1019                  * reports. Fortunately, the Win8 spec says that all touches
1020                  * should be sent during each report, making the initialization
1021                  * of input reports unnecessary.
1022                  */
1023                 hdev->quirks |= HID_QUIRK_NO_INIT_INPUT_REPORTS;
1024 
1025         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1026         if (!td) {
1027                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1028                 return -ENOMEM;
1029         }
1030         td->mtclass = *mtclass;
1031         td->inputmode = -1;
1032         td->maxcontact_report_id = -1;
1033         td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1034         td->cc_index = -1;
1035         td->mt_report_id = -1;
1036         hid_set_drvdata(hdev, td);
1037 
1038         td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
1039                                   GFP_KERNEL);
1040         if (!td->fields) {
1041                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1042                 return -ENOMEM;
1043         }
1044 
1045         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1046                 td->serial_maybe = true;
1047 
1048         ret = hid_parse(hdev);
1049         if (ret != 0)
1050                 return ret;
1051 
1052         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1053         if (ret)
1054                 return ret;
1055 
1056         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1057 
1058         mt_set_maxcontacts(hdev);
1059         mt_set_input_mode(hdev);
1060 
1061         /* release .fields memory as it is not used anymore */
1062         devm_kfree(&hdev->dev, td->fields);
1063         td->fields = NULL;
1064 
1065         return 0;
1066 }
1067 
1068 #ifdef CONFIG_PM
1069 static int mt_reset_resume(struct hid_device *hdev)
1070 {
1071         mt_set_maxcontacts(hdev);
1072         mt_set_input_mode(hdev);
1073         return 0;
1074 }
1075 
1076 static int mt_resume(struct hid_device *hdev)
1077 {
1078         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1079          * It should be safe to send it to other devices too.
1080          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1081 
1082         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1083 
1084         return 0;
1085 }
1086 #endif
1087 
1088 static void mt_remove(struct hid_device *hdev)
1089 {
1090         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1091         hid_hw_stop(hdev);
1092 }
1093 
1094 /*
1095  * This list contains only:
1096  * - VID/PID of products not working with the default multitouch handling
1097  * - 2 generic rules.
1098  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1099  */
1100 static const struct hid_device_id mt_devices[] = {
1101 
1102         /* 3M panels */
1103         { .driver_data = MT_CLS_3M,
1104                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1105                         USB_DEVICE_ID_3M1968) },
1106         { .driver_data = MT_CLS_3M,
1107                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1108                         USB_DEVICE_ID_3M2256) },
1109         { .driver_data = MT_CLS_3M,
1110                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1111                         USB_DEVICE_ID_3M3266) },
1112 
1113         /* Anton devices */
1114         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1115                 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1116                         USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1117 
1118         /* Atmel panels */
1119         { .driver_data = MT_CLS_SERIAL,
1120                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1121                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1122 
1123         /* Baanto multitouch devices */
1124         { .driver_data = MT_CLS_NSMU,
1125                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1126                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1127 
1128         /* Cando panels */
1129         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1130                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1131                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1132         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1133                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1134                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1135 
1136         /* Chunghwa Telecom touch panels */
1137         {  .driver_data = MT_CLS_NSMU,
1138                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1139                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1140 
1141         /* CVTouch panels */
1142         { .driver_data = MT_CLS_NSMU,
1143                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1144                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1145 
1146         /* eGalax devices (resistive) */
1147         { .driver_data = MT_CLS_EGALAX,
1148                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1149                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1150         { .driver_data = MT_CLS_EGALAX,
1151                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1152                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1153 
1154         /* eGalax devices (capacitive) */
1155         { .driver_data = MT_CLS_EGALAX_SERIAL,
1156                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1157                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1158         { .driver_data = MT_CLS_EGALAX,
1159                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1160                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1161         { .driver_data = MT_CLS_EGALAX_SERIAL,
1162                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1163                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1164         { .driver_data = MT_CLS_EGALAX_SERIAL,
1165                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1166                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1167         { .driver_data = MT_CLS_EGALAX_SERIAL,
1168                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1169                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1170         { .driver_data = MT_CLS_EGALAX_SERIAL,
1171                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1172                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1173         { .driver_data = MT_CLS_EGALAX,
1174                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1175                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1176         { .driver_data = MT_CLS_EGALAX,
1177                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1178                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1179         { .driver_data = MT_CLS_EGALAX_SERIAL,
1180                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1181                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1182         { .driver_data = MT_CLS_EGALAX,
1183                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1184                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1185         { .driver_data = MT_CLS_EGALAX,
1186                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1187                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1188         { .driver_data = MT_CLS_EGALAX,
1189                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1190                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1191         { .driver_data = MT_CLS_EGALAX,
1192                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1193                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1194         { .driver_data = MT_CLS_EGALAX_SERIAL,
1195                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1196                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1197         { .driver_data = MT_CLS_EGALAX_SERIAL,
1198                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1199                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1200         { .driver_data = MT_CLS_EGALAX_SERIAL,
1201                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1202                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1203 
1204         /* Elitegroup panel */
1205         { .driver_data = MT_CLS_SERIAL,
1206                 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1207                         USB_DEVICE_ID_ELITEGROUP_05D8) },
1208 
1209         /* Flatfrog Panels */
1210         { .driver_data = MT_CLS_FLATFROG,
1211                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1212                         USB_DEVICE_ID_MULTITOUCH_3200) },
1213 
1214         /* FocalTech Panels */
1215         { .driver_data = MT_CLS_SERIAL,
1216                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1217                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1218 
1219         /* GeneralTouch panel */
1220         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1221                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1222                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1223         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1224                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1225                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1226         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1227                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1228                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1229         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1230                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1231                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1232         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1233                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1234                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1235         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1236                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1237                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1238         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1239                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1240                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1241 
1242         /* Gametel game controller */
1243         { .driver_data = MT_CLS_NSMU,
1244                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1245                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1246 
1247         /* GoodTouch panels */
1248         { .driver_data = MT_CLS_NSMU,
1249                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1250                         USB_DEVICE_ID_GOODTOUCH_000f) },
1251 
1252         /* Hanvon panels */
1253         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1254                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1255                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1256 
1257         /* Ilitek dual touch panel */
1258         {  .driver_data = MT_CLS_NSMU,
1259                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1260                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1261 
1262         /* MosArt panels */
1263         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1264                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1265                         USB_DEVICE_ID_ASUS_T91MT)},
1266         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1267                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1268                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1269         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1270                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1271                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1272 
1273         /* Panasonic panels */
1274         { .driver_data = MT_CLS_PANASONIC,
1275                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1276                         USB_DEVICE_ID_PANABOARD_UBT780) },
1277         { .driver_data = MT_CLS_PANASONIC,
1278                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1279                         USB_DEVICE_ID_PANABOARD_UBT880) },
1280 
1281         /* Novatek Panel */
1282         { .driver_data = MT_CLS_NSMU,
1283                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1284                         USB_DEVICE_ID_NOVATEK_PCT) },
1285 
1286         /* PixArt optical touch screen */
1287         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1288                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1289                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1290         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1291                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1292                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1293         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1294                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1295                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1296 
1297         /* PixCir-based panels */
1298         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1299                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1300                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1301 
1302         /* Quanta-based panels */
1303         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1304                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1305                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1306 
1307         /* Stantum panels */
1308         { .driver_data = MT_CLS_CONFIDENCE,
1309                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1310                         USB_DEVICE_ID_MTP_STM)},
1311 
1312         /* TopSeed panels */
1313         { .driver_data = MT_CLS_TOPSEED,
1314                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1315                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1316 
1317         /* Touch International panels */
1318         { .driver_data = MT_CLS_NSMU,
1319                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1320                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1321 
1322         /* Unitec panels */
1323         { .driver_data = MT_CLS_NSMU,
1324                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1325                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1326         { .driver_data = MT_CLS_NSMU,
1327                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1328                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1329 
1330         /* VTL panels */
1331         { .driver_data = MT_CLS_VTL,
1332                 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
1333                         USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
1334 
1335         /* Wistron panels */
1336         { .driver_data = MT_CLS_NSMU,
1337                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1338                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1339 
1340         /* XAT */
1341         { .driver_data = MT_CLS_NSMU,
1342                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1343                         USB_DEVICE_ID_XAT_CSR) },
1344 
1345         /* Xiroku */
1346         { .driver_data = MT_CLS_NSMU,
1347                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1348                         USB_DEVICE_ID_XIROKU_SPX) },
1349         { .driver_data = MT_CLS_NSMU,
1350                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1351                         USB_DEVICE_ID_XIROKU_MPX) },
1352         { .driver_data = MT_CLS_NSMU,
1353                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1354                         USB_DEVICE_ID_XIROKU_CSR) },
1355         { .driver_data = MT_CLS_NSMU,
1356                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1357                         USB_DEVICE_ID_XIROKU_SPX1) },
1358         { .driver_data = MT_CLS_NSMU,
1359                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1360                         USB_DEVICE_ID_XIROKU_MPX1) },
1361         { .driver_data = MT_CLS_NSMU,
1362                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1363                         USB_DEVICE_ID_XIROKU_CSR1) },
1364         { .driver_data = MT_CLS_NSMU,
1365                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1366                         USB_DEVICE_ID_XIROKU_SPX2) },
1367         { .driver_data = MT_CLS_NSMU,
1368                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1369                         USB_DEVICE_ID_XIROKU_MPX2) },
1370         { .driver_data = MT_CLS_NSMU,
1371                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1372                         USB_DEVICE_ID_XIROKU_CSR2) },
1373 
1374         /* Generic MT device */
1375         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1376 
1377         /* Generic Win 8 certified MT device */
1378         {  .driver_data = MT_CLS_WIN_8,
1379                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1380                         HID_ANY_ID, HID_ANY_ID) },
1381         { }
1382 };
1383 MODULE_DEVICE_TABLE(hid, mt_devices);
1384 
1385 static const struct hid_usage_id mt_grabbed_usages[] = {
1386         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1387         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1388 };
1389 
1390 static struct hid_driver mt_driver = {
1391         .name = "hid-multitouch",
1392         .id_table = mt_devices,
1393         .probe = mt_probe,
1394         .remove = mt_remove,
1395         .input_mapping = mt_input_mapping,
1396         .input_mapped = mt_input_mapped,
1397         .input_configured = mt_input_configured,
1398         .feature_mapping = mt_feature_mapping,
1399         .usage_table = mt_grabbed_usages,
1400         .event = mt_event,
1401         .report = mt_report,
1402 #ifdef CONFIG_PM
1403         .reset_resume = mt_reset_resume,
1404         .resume = mt_resume,
1405 #endif
1406 };
1407 module_hid_driver(mt_driver);
1408 

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