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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 struct mt_slot {
 72         __s32 x, y, cx, cy, p, w, h;
 73         __s32 contactid;        /* the device ContactID assigned to this slot */
 74         bool touch_state;       /* is the touch valid? */
 75         bool inrange_state;     /* is the finger in proximity of the sensor? */
 76 };
 77 
 78 struct mt_class {
 79         __s32 name;     /* MT_CLS */
 80         __s32 quirks;
 81         __s32 sn_move;  /* Signal/noise ratio for move events */
 82         __s32 sn_width; /* Signal/noise ratio for width events */
 83         __s32 sn_height;        /* Signal/noise ratio for height events */
 84         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
 85         __u8 maxcontacts;
 86         bool is_indirect;       /* true for touchpads */
 87 };
 88 
 89 struct mt_fields {
 90         unsigned usages[HID_MAX_FIELDS];
 91         unsigned int length;
 92 };
 93 
 94 struct mt_device {
 95         struct mt_slot curdata; /* placeholder of incoming data */
 96         struct mt_class mtclass;        /* our mt device class */
 97         struct mt_fields *fields;       /* temporary placeholder for storing the
 98                                            multitouch fields */
 99         int cc_index;   /* contact count field index in the report */
100         int cc_value_index;     /* contact count value index in the field */
101         unsigned last_slot_field;       /* the last field of a slot */
102         unsigned mt_report_id;  /* the report ID of the multitouch device */
103         unsigned pen_report_id; /* the report ID of the pen device */
104         __s16 inputmode;        /* InputMode HID feature, -1 if non-existent */
105         __s16 inputmode_index;  /* InputMode HID feature index in the report */
106         __s16 maxcontact_report_id;     /* Maximum Contact Number HID feature,
107                                    -1 if non-existent */
108         __u8 num_received;      /* how many contacts we received */
109         __u8 num_expected;      /* expected last contact index */
110         __u8 maxcontacts;
111         __u8 touches_by_report; /* how many touches are present in one report:
112                                 * 1 means we should use a serial protocol
113                                 * > 1 means hybrid (multitouch) protocol */
114         bool serial_maybe;      /* need to check for serial protocol */
115         bool curvalid;          /* is the current contact valid? */
116         unsigned mt_flags;      /* flags to pass to input-mt */
117 };
118 
119 static void mt_post_parse_default_settings(struct mt_device *td);
120 static void mt_post_parse(struct mt_device *td);
121 
122 /* classes of device behavior */
123 #define MT_CLS_DEFAULT                          0x0001
124 
125 #define MT_CLS_SERIAL                           0x0002
126 #define MT_CLS_CONFIDENCE                       0x0003
127 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
128 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
129 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
130 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
131 #define MT_CLS_DUAL_NSMU_CONTACTID              0x0008
132 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
133 #define MT_CLS_NSMU                             0x000a
134 #define MT_CLS_DUAL_CONTACT_NUMBER              0x0010
135 #define MT_CLS_DUAL_CONTACT_ID                  0x0011
136 #define MT_CLS_WIN_8                            0x0012
137 
138 /* vendor specific classes */
139 #define MT_CLS_3M                               0x0101
140 #define MT_CLS_CYPRESS                          0x0102
141 #define MT_CLS_EGALAX                           0x0103
142 #define MT_CLS_EGALAX_SERIAL                    0x0104
143 #define MT_CLS_TOPSEED                          0x0105
144 #define MT_CLS_PANASONIC                        0x0106
145 #define MT_CLS_FLATFROG                         0x0107
146 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
147 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
148 
149 #define MT_DEFAULT_MAXCONTACT   10
150 #define MT_MAX_MAXCONTACT       250
151 
152 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
153 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
154 
155 /*
156  * these device-dependent functions determine what slot corresponds
157  * to a valid contact that was just read.
158  */
159 
160 static int cypress_compute_slot(struct mt_device *td)
161 {
162         if (td->curdata.contactid != 0 || td->num_received == 0)
163                 return td->curdata.contactid;
164         else
165                 return -1;
166 }
167 
168 static struct mt_class mt_classes[] = {
169         { .name = MT_CLS_DEFAULT,
170                 .quirks = MT_QUIRK_ALWAYS_VALID |
171                         MT_QUIRK_CONTACT_CNT_ACCURATE },
172         { .name = MT_CLS_NSMU,
173                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
174         { .name = MT_CLS_SERIAL,
175                 .quirks = MT_QUIRK_ALWAYS_VALID},
176         { .name = MT_CLS_CONFIDENCE,
177                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
178         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
179                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
180                         MT_QUIRK_SLOT_IS_CONTACTID },
181         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
182                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
183                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
184         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
185                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
186                         MT_QUIRK_SLOT_IS_CONTACTID,
187                 .maxcontacts = 2 },
188         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
189                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
190                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
191                 .maxcontacts = 2 },
192         { .name = MT_CLS_DUAL_NSMU_CONTACTID,
193                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
194                         MT_QUIRK_SLOT_IS_CONTACTID,
195                 .maxcontacts = 2 },
196         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
197                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
198                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
199         { .name = MT_CLS_DUAL_CONTACT_NUMBER,
200                 .quirks = MT_QUIRK_ALWAYS_VALID |
201                         MT_QUIRK_CONTACT_CNT_ACCURATE |
202                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
203                 .maxcontacts = 2 },
204         { .name = MT_CLS_DUAL_CONTACT_ID,
205                 .quirks = MT_QUIRK_ALWAYS_VALID |
206                         MT_QUIRK_CONTACT_CNT_ACCURATE |
207                         MT_QUIRK_SLOT_IS_CONTACTID,
208                 .maxcontacts = 2 },
209         { .name = MT_CLS_WIN_8,
210                 .quirks = MT_QUIRK_ALWAYS_VALID |
211                         MT_QUIRK_IGNORE_DUPLICATES |
212                         MT_QUIRK_HOVERING |
213                         MT_QUIRK_CONTACT_CNT_ACCURATE },
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_CYPRESS,
227                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
228                         MT_QUIRK_CYPRESS,
229                 .maxcontacts = 10 },
230         { .name = MT_CLS_EGALAX,
231                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
232                         MT_QUIRK_VALID_IS_INRANGE,
233                 .sn_move = 4096,
234                 .sn_pressure = 32,
235         },
236         { .name = MT_CLS_EGALAX_SERIAL,
237                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
238                         MT_QUIRK_ALWAYS_VALID,
239                 .sn_move = 4096,
240                 .sn_pressure = 32,
241         },
242         { .name = MT_CLS_TOPSEED,
243                 .quirks = MT_QUIRK_ALWAYS_VALID,
244                 .is_indirect = true,
245                 .maxcontacts = 2,
246         },
247         { .name = MT_CLS_PANASONIC,
248                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
249                 .maxcontacts = 4 },
250         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
251                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
252                         MT_QUIRK_VALID_IS_INRANGE |
253                         MT_QUIRK_SLOT_IS_CONTACTID,
254                 .maxcontacts = 2
255         },
256         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
257                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
258                         MT_QUIRK_SLOT_IS_CONTACTID
259         },
260 
261         { .name = MT_CLS_FLATFROG,
262                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
263                         MT_QUIRK_NO_AREA,
264                 .sn_move = 2048,
265                 .maxcontacts = 40,
266         },
267         { }
268 };
269 
270 static ssize_t mt_show_quirks(struct device *dev,
271                            struct device_attribute *attr,
272                            char *buf)
273 {
274         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
275         struct mt_device *td = hid_get_drvdata(hdev);
276 
277         return sprintf(buf, "%u\n", td->mtclass.quirks);
278 }
279 
280 static ssize_t mt_set_quirks(struct device *dev,
281                           struct device_attribute *attr,
282                           const char *buf, size_t count)
283 {
284         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
285         struct mt_device *td = hid_get_drvdata(hdev);
286 
287         unsigned long val;
288 
289         if (kstrtoul(buf, 0, &val))
290                 return -EINVAL;
291 
292         td->mtclass.quirks = val;
293 
294         if (td->cc_index < 0)
295                 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
296 
297         return count;
298 }
299 
300 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
301 
302 static struct attribute *sysfs_attrs[] = {
303         &dev_attr_quirks.attr,
304         NULL
305 };
306 
307 static struct attribute_group mt_attribute_group = {
308         .attrs = sysfs_attrs
309 };
310 
311 static void mt_feature_mapping(struct hid_device *hdev,
312                 struct hid_field *field, struct hid_usage *usage)
313 {
314         struct mt_device *td = hid_get_drvdata(hdev);
315 
316         switch (usage->hid) {
317         case HID_DG_INPUTMODE:
318                 /* Ignore if value index is out of bounds. */
319                 if (usage->usage_index >= field->report_count) {
320                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
321                         break;
322                 }
323 
324                 td->inputmode = field->report->id;
325                 td->inputmode_index = usage->usage_index;
326 
327                 break;
328         case HID_DG_CONTACTMAX:
329                 td->maxcontact_report_id = field->report->id;
330                 td->maxcontacts = field->value[0];
331                 if (!td->maxcontacts &&
332                     field->logical_maximum <= MT_MAX_MAXCONTACT)
333                         td->maxcontacts = field->logical_maximum;
334                 if (td->mtclass.maxcontacts)
335                         /* check if the maxcontacts is given by the class */
336                         td->maxcontacts = td->mtclass.maxcontacts;
337 
338                 break;
339         }
340 }
341 
342 static void set_abs(struct input_dev *input, unsigned int code,
343                 struct hid_field *field, int snratio)
344 {
345         int fmin = field->logical_minimum;
346         int fmax = field->logical_maximum;
347         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
348         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
349         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
350 }
351 
352 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
353                 struct hid_input *hi)
354 {
355         struct mt_fields *f = td->fields;
356 
357         if (f->length >= HID_MAX_FIELDS)
358                 return;
359 
360         f->usages[f->length++] = usage->hid;
361 }
362 
363 static int mt_pen_input_mapping(struct hid_device *hdev, struct hid_input *hi,
364                 struct hid_field *field, struct hid_usage *usage,
365                 unsigned long **bit, int *max)
366 {
367         struct mt_device *td = hid_get_drvdata(hdev);
368 
369         td->pen_report_id = field->report->id;
370 
371         return 0;
372 }
373 
374 static int mt_pen_input_mapped(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         return 0;
379 }
380 
381 static int mt_pen_event(struct hid_device *hid, struct hid_field *field,
382                                 struct hid_usage *usage, __s32 value)
383 {
384         /* let hid-input handle it */
385         return 0;
386 }
387 
388 static void mt_pen_report(struct hid_device *hid, struct hid_report *report)
389 {
390         struct hid_field *field = report->field[0];
391 
392         input_sync(field->hidinput->input);
393 }
394 
395 static void mt_pen_input_configured(struct hid_device *hdev,
396                                         struct hid_input *hi)
397 {
398         /* force BTN_STYLUS to allow tablet matching in udev */
399         __set_bit(BTN_STYLUS, hi->input->keybit);
400 }
401 
402 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
403                 struct hid_field *field, struct hid_usage *usage,
404                 unsigned long **bit, int *max)
405 {
406         struct mt_device *td = hid_get_drvdata(hdev);
407         struct mt_class *cls = &td->mtclass;
408         int code;
409         struct hid_usage *prev_usage = NULL;
410 
411         if (field->application == HID_DG_TOUCHSCREEN)
412                 td->mt_flags |= INPUT_MT_DIRECT;
413 
414         /*
415          * Model touchscreens providing buttons as touchpads.
416          */
417         if (field->application == HID_DG_TOUCHPAD ||
418             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
419                 td->mt_flags |= INPUT_MT_POINTER;
420 
421         if (usage->usage_index)
422                 prev_usage = &field->usage[usage->usage_index - 1];
423 
424         switch (usage->hid & HID_USAGE_PAGE) {
425 
426         case HID_UP_GENDESK:
427                 switch (usage->hid) {
428                 case HID_GD_X:
429                         if (prev_usage && (prev_usage->hid == usage->hid)) {
430                                 hid_map_usage(hi, usage, bit, max,
431                                         EV_ABS, ABS_MT_TOOL_X);
432                                 set_abs(hi->input, ABS_MT_TOOL_X, field,
433                                         cls->sn_move);
434                         } else {
435                                 hid_map_usage(hi, usage, bit, max,
436                                         EV_ABS, ABS_MT_POSITION_X);
437                                 set_abs(hi->input, ABS_MT_POSITION_X, field,
438                                         cls->sn_move);
439                         }
440 
441                         mt_store_field(usage, td, hi);
442                         return 1;
443                 case HID_GD_Y:
444                         if (prev_usage && (prev_usage->hid == usage->hid)) {
445                                 hid_map_usage(hi, usage, bit, max,
446                                         EV_ABS, ABS_MT_TOOL_Y);
447                                 set_abs(hi->input, ABS_MT_TOOL_Y, field,
448                                         cls->sn_move);
449                         } else {
450                                 hid_map_usage(hi, usage, bit, max,
451                                         EV_ABS, ABS_MT_POSITION_Y);
452                                 set_abs(hi->input, ABS_MT_POSITION_Y, field,
453                                         cls->sn_move);
454                         }
455 
456                         mt_store_field(usage, td, hi);
457                         return 1;
458                 }
459                 return 0;
460 
461         case HID_UP_DIGITIZER:
462                 switch (usage->hid) {
463                 case HID_DG_INRANGE:
464                         if (cls->quirks & MT_QUIRK_HOVERING) {
465                                 hid_map_usage(hi, usage, bit, max,
466                                         EV_ABS, ABS_MT_DISTANCE);
467                                 input_set_abs_params(hi->input,
468                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
469                         }
470                         mt_store_field(usage, td, hi);
471                         return 1;
472                 case HID_DG_CONFIDENCE:
473                         mt_store_field(usage, td, hi);
474                         return 1;
475                 case HID_DG_TIPSWITCH:
476                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
477                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
478                         mt_store_field(usage, td, hi);
479                         return 1;
480                 case HID_DG_CONTACTID:
481                         mt_store_field(usage, td, hi);
482                         td->touches_by_report++;
483                         td->mt_report_id = field->report->id;
484                         return 1;
485                 case HID_DG_WIDTH:
486                         hid_map_usage(hi, usage, bit, max,
487                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
488                         if (!(cls->quirks & MT_QUIRK_NO_AREA))
489                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
490                                         cls->sn_width);
491                         mt_store_field(usage, td, hi);
492                         return 1;
493                 case HID_DG_HEIGHT:
494                         hid_map_usage(hi, usage, bit, max,
495                                         EV_ABS, ABS_MT_TOUCH_MINOR);
496                         if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
497                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
498                                         cls->sn_height);
499                                 input_set_abs_params(hi->input,
500                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
501                         }
502                         mt_store_field(usage, td, hi);
503                         return 1;
504                 case HID_DG_TIPPRESSURE:
505                         hid_map_usage(hi, usage, bit, max,
506                                         EV_ABS, ABS_MT_PRESSURE);
507                         set_abs(hi->input, ABS_MT_PRESSURE, field,
508                                 cls->sn_pressure);
509                         mt_store_field(usage, td, hi);
510                         return 1;
511                 case HID_DG_CONTACTCOUNT:
512                         /* Ignore if indexes are out of bounds. */
513                         if (field->index >= field->report->maxfield ||
514                             usage->usage_index >= field->report_count)
515                                 return 1;
516                         td->cc_index = field->index;
517                         td->cc_value_index = usage->usage_index;
518                         return 1;
519                 case HID_DG_CONTACTMAX:
520                         /* we don't set td->last_slot_field as contactcount and
521                          * contact max are global to the report */
522                         return -1;
523                 case HID_DG_TOUCH:
524                         /* Legacy devices use TIPSWITCH and not TOUCH.
525                          * Let's just ignore this field. */
526                         return -1;
527                 }
528                 /* let hid-input decide for the others */
529                 return 0;
530 
531         case HID_UP_BUTTON:
532                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
533                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
534                 input_set_capability(hi->input, EV_KEY, code);
535                 return 1;
536 
537         case 0xff000000:
538                 /* we do not want to map these: no input-oriented meaning */
539                 return -1;
540         }
541 
542         return 0;
543 }
544 
545 static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
546                 struct hid_field *field, struct hid_usage *usage,
547                 unsigned long **bit, int *max)
548 {
549         if (usage->type == EV_KEY || usage->type == EV_ABS)
550                 set_bit(usage->type, hi->input->evbit);
551 
552         return -1;
553 }
554 
555 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
556 {
557         __s32 quirks = td->mtclass.quirks;
558 
559         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
560                 return td->curdata.contactid;
561 
562         if (quirks & MT_QUIRK_CYPRESS)
563                 return cypress_compute_slot(td);
564 
565         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
566                 return td->num_received;
567 
568         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
569                 return td->curdata.contactid - 1;
570 
571         return input_mt_get_slot_by_key(input, td->curdata.contactid);
572 }
573 
574 /*
575  * this function is called when a whole contact has been processed,
576  * so that it can assign it to a slot and store the data there
577  */
578 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
579 {
580         if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
581             td->num_received >= td->num_expected)
582                 return;
583 
584         if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
585                 int slotnum = mt_compute_slot(td, input);
586                 struct mt_slot *s = &td->curdata;
587                 struct input_mt *mt = input->mt;
588 
589                 if (slotnum < 0 || slotnum >= td->maxcontacts)
590                         return;
591 
592                 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
593                         struct input_mt_slot *slot = &mt->slots[slotnum];
594                         if (input_mt_is_active(slot) &&
595                             input_mt_is_used(mt, slot))
596                                 return;
597                 }
598 
599                 input_mt_slot(input, slotnum);
600                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
601                         s->touch_state || s->inrange_state);
602                 if (s->touch_state || s->inrange_state) {
603                         /* this finger is in proximity of the sensor */
604                         int wide = (s->w > s->h);
605                         /* divided by two to match visual scale of touch */
606                         int major = max(s->w, s->h) >> 1;
607                         int minor = min(s->w, s->h) >> 1;
608 
609                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
610                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
611                         input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
612                         input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
613                         input_event(input, EV_ABS, ABS_MT_DISTANCE,
614                                 !s->touch_state);
615                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
616                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
617                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
618                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
619                 }
620         }
621 
622         td->num_received++;
623 }
624 
625 /*
626  * this function is called when a whole packet has been received and processed,
627  * so that it can decide what to send to the input layer.
628  */
629 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
630 {
631         input_mt_sync_frame(input);
632         input_sync(input);
633         td->num_received = 0;
634 }
635 
636 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
637                                 struct hid_usage *usage, __s32 value)
638 {
639         /* we will handle the hidinput part later, now remains hiddev */
640         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
641                 hid->hiddev_hid_event(hid, field, usage, value);
642 
643         return 1;
644 }
645 
646 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
647                                 struct hid_usage *usage, __s32 value)
648 {
649         struct mt_device *td = hid_get_drvdata(hid);
650         __s32 quirks = td->mtclass.quirks;
651         struct input_dev *input = field->hidinput->input;
652 
653         if (hid->claimed & HID_CLAIMED_INPUT) {
654                 switch (usage->hid) {
655                 case HID_DG_INRANGE:
656                         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
657                                 td->curvalid = value;
658                         if (quirks & MT_QUIRK_HOVERING)
659                                 td->curdata.inrange_state = value;
660                         break;
661                 case HID_DG_TIPSWITCH:
662                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
663                                 td->curvalid = value;
664                         td->curdata.touch_state = value;
665                         break;
666                 case HID_DG_CONFIDENCE:
667                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
668                                 td->curvalid = value;
669                         break;
670                 case HID_DG_CONTACTID:
671                         td->curdata.contactid = value;
672                         break;
673                 case HID_DG_TIPPRESSURE:
674                         td->curdata.p = value;
675                         break;
676                 case HID_GD_X:
677                         if (usage->code == ABS_MT_TOOL_X)
678                                 td->curdata.cx = value;
679                         else
680                                 td->curdata.x = value;
681                         break;
682                 case HID_GD_Y:
683                         if (usage->code == ABS_MT_TOOL_Y)
684                                 td->curdata.cy = value;
685                         else
686                                 td->curdata.y = value;
687                         break;
688                 case HID_DG_WIDTH:
689                         td->curdata.w = value;
690                         break;
691                 case HID_DG_HEIGHT:
692                         td->curdata.h = value;
693                         break;
694                 case HID_DG_CONTACTCOUNT:
695                         break;
696                 case HID_DG_TOUCH:
697                         /* do nothing */
698                         break;
699 
700                 default:
701                         if (usage->type)
702                                 input_event(input, usage->type, usage->code,
703                                                 value);
704                         return;
705                 }
706 
707                 if (usage->usage_index + 1 == field->report_count) {
708                         /* we only take into account the last report. */
709                         if (usage->hid == td->last_slot_field)
710                                 mt_complete_slot(td, field->hidinput->input);
711                 }
712 
713         }
714 }
715 
716 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
717 {
718         struct mt_device *td = hid_get_drvdata(hid);
719         struct hid_field *field;
720         unsigned count;
721         int r, n;
722 
723         /*
724          * Includes multi-packet support where subsequent
725          * packets are sent with zero contactcount.
726          */
727         if (td->cc_index >= 0) {
728                 struct hid_field *field = report->field[td->cc_index];
729                 int value = field->value[td->cc_value_index];
730                 if (value)
731                         td->num_expected = value;
732         }
733 
734         for (r = 0; r < report->maxfield; r++) {
735                 field = report->field[r];
736                 count = field->report_count;
737 
738                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
739                         continue;
740 
741                 for (n = 0; n < count; n++)
742                         mt_process_mt_event(hid, field, &field->usage[n],
743                                         field->value[n]);
744         }
745 
746         if (td->num_received >= td->num_expected)
747                 mt_sync_frame(td, report->field[0]->hidinput->input);
748 }
749 
750 static void mt_touch_input_configured(struct hid_device *hdev,
751                                         struct hid_input *hi)
752 {
753         struct mt_device *td = hid_get_drvdata(hdev);
754         struct mt_class *cls = &td->mtclass;
755         struct input_dev *input = hi->input;
756 
757         if (!td->maxcontacts)
758                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
759 
760         mt_post_parse(td);
761         if (td->serial_maybe)
762                 mt_post_parse_default_settings(td);
763 
764         if (cls->is_indirect)
765                 td->mt_flags |= INPUT_MT_POINTER;
766 
767         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
768                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
769 
770         input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
771 
772         td->mt_flags = 0;
773 }
774 
775 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
776                 struct hid_field *field, struct hid_usage *usage,
777                 unsigned long **bit, int *max)
778 {
779         /* Only map fields from TouchScreen or TouchPad collections.
780         * We need to ignore fields that belong to other collections
781         * such as Mouse that might have the same GenericDesktop usages. */
782         if (field->application != HID_DG_TOUCHSCREEN &&
783             field->application != HID_DG_PEN &&
784             field->application != HID_DG_TOUCHPAD)
785                 return -1;
786 
787         if (field->physical == HID_DG_STYLUS)
788                 return mt_pen_input_mapping(hdev, hi, field, usage, bit, max);
789 
790         return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
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         if (field->physical == HID_DG_STYLUS)
798                 return mt_pen_input_mapped(hdev, hi, field, usage, bit, max);
799 
800         return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
801 }
802 
803 static int mt_event(struct hid_device *hid, struct hid_field *field,
804                                 struct hid_usage *usage, __s32 value)
805 {
806         struct mt_device *td = hid_get_drvdata(hid);
807 
808         if (field->report->id == td->mt_report_id)
809                 return mt_touch_event(hid, field, usage, value);
810 
811         if (field->report->id == td->pen_report_id)
812                 return mt_pen_event(hid, field, usage, value);
813 
814         /* ignore other reports */
815         return 1;
816 }
817 
818 static void mt_report(struct hid_device *hid, struct hid_report *report)
819 {
820         struct mt_device *td = hid_get_drvdata(hid);
821 
822         if (!(hid->claimed & HID_CLAIMED_INPUT))
823                 return;
824 
825         if (report->id == td->mt_report_id)
826                 mt_touch_report(hid, report);
827 
828         if (report->id == td->pen_report_id)
829                 mt_pen_report(hid, report);
830 }
831 
832 static void mt_set_input_mode(struct hid_device *hdev)
833 {
834         struct mt_device *td = hid_get_drvdata(hdev);
835         struct hid_report *r;
836         struct hid_report_enum *re;
837 
838         if (td->inputmode < 0)
839                 return;
840 
841         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
842         r = re->report_id_hash[td->inputmode];
843         if (r) {
844                 r->field[0]->value[td->inputmode_index] = 0x02;
845                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
846         }
847 }
848 
849 static void mt_set_maxcontacts(struct hid_device *hdev)
850 {
851         struct mt_device *td = hid_get_drvdata(hdev);
852         struct hid_report *r;
853         struct hid_report_enum *re;
854         int fieldmax, max;
855 
856         if (td->maxcontact_report_id < 0)
857                 return;
858 
859         if (!td->mtclass.maxcontacts)
860                 return;
861 
862         re = &hdev->report_enum[HID_FEATURE_REPORT];
863         r = re->report_id_hash[td->maxcontact_report_id];
864         if (r) {
865                 max = td->mtclass.maxcontacts;
866                 fieldmax = r->field[0]->logical_maximum;
867                 max = min(fieldmax, max);
868                 if (r->field[0]->value[0] != max) {
869                         r->field[0]->value[0] = max;
870                         hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
871                 }
872         }
873 }
874 
875 static void mt_post_parse_default_settings(struct mt_device *td)
876 {
877         __s32 quirks = td->mtclass.quirks;
878 
879         /* unknown serial device needs special quirks */
880         if (td->touches_by_report == 1) {
881                 quirks |= MT_QUIRK_ALWAYS_VALID;
882                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
883                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
884                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
885                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
886         }
887 
888         td->mtclass.quirks = quirks;
889 }
890 
891 static void mt_post_parse(struct mt_device *td)
892 {
893         struct mt_fields *f = td->fields;
894         struct mt_class *cls = &td->mtclass;
895 
896         if (td->touches_by_report > 0) {
897                 int field_count_per_touch = f->length / td->touches_by_report;
898                 td->last_slot_field = f->usages[field_count_per_touch - 1];
899         }
900 
901         if (td->cc_index < 0)
902                 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
903 }
904 
905 static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
906 {
907         struct mt_device *td = hid_get_drvdata(hdev);
908         char *name;
909         const char *suffix = NULL;
910 
911         if (hi->report->id == td->mt_report_id)
912                 mt_touch_input_configured(hdev, hi);
913 
914         if (hi->report->field[0]->physical == HID_DG_STYLUS) {
915                 suffix = "Pen";
916                 mt_pen_input_configured(hdev, hi);
917         }
918 
919         if (suffix) {
920                 name = devm_kzalloc(&hi->input->dev,
921                                     strlen(hdev->name) + strlen(suffix) + 2,
922                                     GFP_KERNEL);
923                 if (name) {
924                         sprintf(name, "%s %s", hdev->name, suffix);
925                         hi->input->name = name;
926                 }
927         }
928 }
929 
930 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
931 {
932         int ret, i;
933         struct mt_device *td;
934         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
935 
936         for (i = 0; mt_classes[i].name ; i++) {
937                 if (id->driver_data == mt_classes[i].name) {
938                         mtclass = &(mt_classes[i]);
939                         break;
940                 }
941         }
942 
943         /* This allows the driver to correctly support devices
944          * that emit events over several HID messages.
945          */
946         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
947 
948         /*
949          * This allows the driver to handle different input sensors
950          * that emits events through different reports on the same HID
951          * device.
952          */
953         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
954         hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
955 
956         /*
957          * Handle special quirks for Windows 8 certified devices.
958          */
959         if (id->group == HID_GROUP_MULTITOUCH_WIN_8)
960                 /*
961                  * Some multitouch screens do not like to be polled for input
962                  * reports. Fortunately, the Win8 spec says that all touches
963                  * should be sent during each report, making the initialization
964                  * of input reports unnecessary.
965                  */
966                 hdev->quirks |= HID_QUIRK_NO_INIT_INPUT_REPORTS;
967 
968         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
969         if (!td) {
970                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
971                 return -ENOMEM;
972         }
973         td->mtclass = *mtclass;
974         td->inputmode = -1;
975         td->maxcontact_report_id = -1;
976         td->cc_index = -1;
977         td->mt_report_id = -1;
978         td->pen_report_id = -1;
979         hid_set_drvdata(hdev, td);
980 
981         td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
982                                   GFP_KERNEL);
983         if (!td->fields) {
984                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
985                 return -ENOMEM;
986         }
987 
988         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
989                 td->serial_maybe = true;
990 
991         ret = hid_parse(hdev);
992         if (ret != 0)
993                 return ret;
994 
995         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
996         if (ret)
997                 return ret;
998 
999         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1000 
1001         mt_set_maxcontacts(hdev);
1002         mt_set_input_mode(hdev);
1003 
1004         /* release .fields memory as it is not used anymore */
1005         devm_kfree(&hdev->dev, td->fields);
1006         td->fields = NULL;
1007 
1008         return 0;
1009 }
1010 
1011 #ifdef CONFIG_PM
1012 static int mt_reset_resume(struct hid_device *hdev)
1013 {
1014         mt_set_maxcontacts(hdev);
1015         mt_set_input_mode(hdev);
1016         return 0;
1017 }
1018 
1019 static int mt_resume(struct hid_device *hdev)
1020 {
1021         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1022          * It should be safe to send it to other devices too.
1023          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1024 
1025         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1026 
1027         return 0;
1028 }
1029 #endif
1030 
1031 static void mt_remove(struct hid_device *hdev)
1032 {
1033         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1034         hid_hw_stop(hdev);
1035 }
1036 
1037 static const struct hid_device_id mt_devices[] = {
1038 
1039         /* 3M panels */
1040         { .driver_data = MT_CLS_3M,
1041                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1042                         USB_DEVICE_ID_3M1968) },
1043         { .driver_data = MT_CLS_3M,
1044                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1045                         USB_DEVICE_ID_3M2256) },
1046         { .driver_data = MT_CLS_3M,
1047                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1048                         USB_DEVICE_ID_3M3266) },
1049 
1050         /* ActionStar panels */
1051         { .driver_data = MT_CLS_NSMU,
1052                 MT_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
1053                         USB_DEVICE_ID_ACTIONSTAR_1011) },
1054 
1055         /* Atmel panels */
1056         { .driver_data = MT_CLS_SERIAL,
1057                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1058                         USB_DEVICE_ID_ATMEL_MULTITOUCH) },
1059         { .driver_data = MT_CLS_SERIAL,
1060                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1061                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1062 
1063         /* Baanto multitouch devices */
1064         { .driver_data = MT_CLS_NSMU,
1065                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1066                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1067         /* Cando panels */
1068         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1069                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1070                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1071         { .driver_data = MT_CLS_DUAL_CONTACT_NUMBER,
1072                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1073                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
1074         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1075                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1076                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
1077         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1078                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1079                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1080 
1081         /* Chunghwa Telecom touch panels */
1082         {  .driver_data = MT_CLS_NSMU,
1083                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1084                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1085 
1086         /* CVTouch panels */
1087         { .driver_data = MT_CLS_NSMU,
1088                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1089                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1090 
1091         /* Cypress panel */
1092         { .driver_data = MT_CLS_CYPRESS,
1093                 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
1094                         USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
1095 
1096         /* Data Modul easyMaxTouch */
1097         { .driver_data = MT_CLS_DEFAULT,
1098                 MT_USB_DEVICE(USB_VENDOR_ID_DATA_MODUL,
1099                         USB_VENDOR_ID_DATA_MODUL_EASYMAXTOUCH) },
1100 
1101         /* eGalax devices (resistive) */
1102         { .driver_data = MT_CLS_EGALAX,
1103                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1104                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1105         { .driver_data = MT_CLS_EGALAX,
1106                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1107                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1108 
1109         /* eGalax devices (capacitive) */
1110         { .driver_data = MT_CLS_EGALAX_SERIAL,
1111                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1112                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1113         { .driver_data = MT_CLS_EGALAX,
1114                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1115                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1116         { .driver_data = MT_CLS_EGALAX_SERIAL,
1117                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1118                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1119         { .driver_data = MT_CLS_EGALAX_SERIAL,
1120                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1121                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1122         { .driver_data = MT_CLS_EGALAX_SERIAL,
1123                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1124                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1125         { .driver_data = MT_CLS_EGALAX_SERIAL,
1126                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1127                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1128         { .driver_data = MT_CLS_EGALAX,
1129                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1130                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1131         { .driver_data = MT_CLS_EGALAX,
1132                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1133                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1134         { .driver_data = MT_CLS_EGALAX_SERIAL,
1135                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1136                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1137         { .driver_data = MT_CLS_EGALAX,
1138                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1139                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1140         { .driver_data = MT_CLS_EGALAX,
1141                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1142                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1143         { .driver_data = MT_CLS_EGALAX,
1144                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1145                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1146         { .driver_data = MT_CLS_EGALAX,
1147                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1148                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1149         { .driver_data = MT_CLS_EGALAX_SERIAL,
1150                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1151                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1152         { .driver_data = MT_CLS_EGALAX_SERIAL,
1153                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1154                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1155         { .driver_data = MT_CLS_EGALAX_SERIAL,
1156                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1157                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1158 
1159         /* Elo TouchSystems IntelliTouch Plus panel */
1160         { .driver_data = MT_CLS_DUAL_CONTACT_ID,
1161                 MT_USB_DEVICE(USB_VENDOR_ID_ELO,
1162                         USB_DEVICE_ID_ELO_TS2515) },
1163 
1164         /* Flatfrog Panels */
1165         { .driver_data = MT_CLS_FLATFROG,
1166                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1167                         USB_DEVICE_ID_MULTITOUCH_3200) },
1168 
1169         /* FocalTech Panels */
1170         { .driver_data = MT_CLS_SERIAL,
1171                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1172                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1173 
1174         /* GeneralTouch panel */
1175         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1176                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1177                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1178         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1179                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1180                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1181         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1182                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1183                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1184         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1185                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1186                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1187         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1188                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1189                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1190         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1191                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1192                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1193         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1194                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1195                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1196 
1197         /* Gametel game controller */
1198         { .driver_data = MT_CLS_NSMU,
1199                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1200                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1201 
1202         /* GoodTouch panels */
1203         { .driver_data = MT_CLS_NSMU,
1204                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1205                         USB_DEVICE_ID_GOODTOUCH_000f) },
1206 
1207         /* Hanvon panels */
1208         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1209                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1210                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1211 
1212         /* Ideacom panel */
1213         { .driver_data = MT_CLS_SERIAL,
1214                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
1215                         USB_DEVICE_ID_IDEACOM_IDC6650) },
1216         { .driver_data = MT_CLS_SERIAL,
1217                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
1218                         USB_DEVICE_ID_IDEACOM_IDC6651) },
1219 
1220         /* Ilitek dual touch panel */
1221         {  .driver_data = MT_CLS_NSMU,
1222                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1223                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1224 
1225         /* IRTOUCH panels */
1226         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1227                 MT_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
1228                         USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
1229 
1230         /* LG Display panels */
1231         { .driver_data = MT_CLS_DEFAULT,
1232                 MT_USB_DEVICE(USB_VENDOR_ID_LG,
1233                         USB_DEVICE_ID_LG_MULTITOUCH) },
1234 
1235         /* Lumio panels */
1236         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1237                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
1238                         USB_DEVICE_ID_CRYSTALTOUCH) },
1239         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1240                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
1241                         USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
1242 
1243         /* MosArt panels */
1244         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1245                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1246                         USB_DEVICE_ID_ASUS_T91MT)},
1247         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1248                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1249                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1250         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1251                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1252                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1253 
1254         /* Nexio panels */
1255         { .driver_data = MT_CLS_DEFAULT,
1256                 MT_USB_DEVICE(USB_VENDOR_ID_NEXIO,
1257                         USB_DEVICE_ID_NEXIO_MULTITOUCH_420)},
1258 
1259         /* Panasonic panels */
1260         { .driver_data = MT_CLS_PANASONIC,
1261                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1262                         USB_DEVICE_ID_PANABOARD_UBT780) },
1263         { .driver_data = MT_CLS_PANASONIC,
1264                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1265                         USB_DEVICE_ID_PANABOARD_UBT880) },
1266 
1267         /* Novatek Panel */
1268         { .driver_data = MT_CLS_NSMU,
1269                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1270                         USB_DEVICE_ID_NOVATEK_PCT) },
1271 
1272         /* PenMount panels */
1273         { .driver_data = MT_CLS_CONFIDENCE,
1274                 MT_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
1275                         USB_DEVICE_ID_PENMOUNT_PCI) },
1276 
1277         /* PixArt optical touch screen */
1278         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1279                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1280                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1281         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1282                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1283                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1284         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1285                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1286                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1287 
1288         /* PixCir-based panels */
1289         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1290                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON,
1291                         USB_DEVICE_ID_HANVON_MULTITOUCH) },
1292         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1293                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1294                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1295 
1296         /* Quanta-based panels */
1297         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1298                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1299                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
1300         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1301                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1302                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1303         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1304                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1305                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
1306 
1307         /* SiS panels */
1308         { .driver_data = MT_CLS_DEFAULT,
1309                 HID_USB_DEVICE(USB_VENDOR_ID_SIS_TOUCH,
1310                 USB_DEVICE_ID_SIS9200_TOUCH) },
1311         { .driver_data = MT_CLS_DEFAULT,
1312                 HID_USB_DEVICE(USB_VENDOR_ID_SIS_TOUCH,
1313                 USB_DEVICE_ID_SIS817_TOUCH) },
1314         { .driver_data = MT_CLS_DEFAULT,
1315                 HID_USB_DEVICE(USB_VENDOR_ID_SIS_TOUCH,
1316                 USB_DEVICE_ID_SIS1030_TOUCH) },
1317 
1318         /* Stantum panels */
1319         { .driver_data = MT_CLS_CONFIDENCE,
1320                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM,
1321                         USB_DEVICE_ID_MTP)},
1322         { .driver_data = MT_CLS_CONFIDENCE,
1323                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1324                         USB_DEVICE_ID_MTP_STM)},
1325         { .driver_data = MT_CLS_DEFAULT,
1326                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
1327                         USB_DEVICE_ID_MTP_SITRONIX)},
1328 
1329         /* TopSeed panels */
1330         { .driver_data = MT_CLS_TOPSEED,
1331                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1332                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1333 
1334         /* Touch International panels */
1335         { .driver_data = MT_CLS_NSMU,
1336                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1337                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1338 
1339         /* Unitec panels */
1340         { .driver_data = MT_CLS_NSMU,
1341                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1342                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1343         { .driver_data = MT_CLS_NSMU,
1344                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1345                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1346 
1347         /* Wistron panels */
1348         { .driver_data = MT_CLS_NSMU,
1349                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1350                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1351 
1352         /* XAT */
1353         { .driver_data = MT_CLS_NSMU,
1354                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1355                         USB_DEVICE_ID_XAT_CSR) },
1356 
1357         /* Xiroku */
1358         { .driver_data = MT_CLS_NSMU,
1359                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1360                         USB_DEVICE_ID_XIROKU_SPX) },
1361         { .driver_data = MT_CLS_NSMU,
1362                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1363                         USB_DEVICE_ID_XIROKU_MPX) },
1364         { .driver_data = MT_CLS_NSMU,
1365                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1366                         USB_DEVICE_ID_XIROKU_CSR) },
1367         { .driver_data = MT_CLS_NSMU,
1368                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1369                         USB_DEVICE_ID_XIROKU_SPX1) },
1370         { .driver_data = MT_CLS_NSMU,
1371                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1372                         USB_DEVICE_ID_XIROKU_MPX1) },
1373         { .driver_data = MT_CLS_NSMU,
1374                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1375                         USB_DEVICE_ID_XIROKU_CSR1) },
1376         { .driver_data = MT_CLS_NSMU,
1377                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1378                         USB_DEVICE_ID_XIROKU_SPX2) },
1379         { .driver_data = MT_CLS_NSMU,
1380                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1381                         USB_DEVICE_ID_XIROKU_MPX2) },
1382         { .driver_data = MT_CLS_NSMU,
1383                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1384                         USB_DEVICE_ID_XIROKU_CSR2) },
1385 
1386         /* Zytronic panels */
1387         { .driver_data = MT_CLS_SERIAL,
1388                 MT_USB_DEVICE(USB_VENDOR_ID_ZYTRONIC,
1389                         USB_DEVICE_ID_ZYTRONIC_ZXY100) },
1390 
1391         /* Generic MT device */
1392         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1393 
1394         /* Generic Win 8 certified MT device */
1395         {  .driver_data = MT_CLS_WIN_8,
1396                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1397                         HID_ANY_ID, HID_ANY_ID) },
1398         { }
1399 };
1400 MODULE_DEVICE_TABLE(hid, mt_devices);
1401 
1402 static const struct hid_usage_id mt_grabbed_usages[] = {
1403         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1404         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1405 };
1406 
1407 static struct hid_driver mt_driver = {
1408         .name = "hid-multitouch",
1409         .id_table = mt_devices,
1410         .probe = mt_probe,
1411         .remove = mt_remove,
1412         .input_mapping = mt_input_mapping,
1413         .input_mapped = mt_input_mapped,
1414         .input_configured = mt_input_configured,
1415         .feature_mapping = mt_feature_mapping,
1416         .usage_table = mt_grabbed_usages,
1417         .event = mt_event,
1418         .report = mt_report,
1419 #ifdef CONFIG_PM
1420         .reset_resume = mt_reset_resume,
1421         .resume = mt_resume,
1422 #endif
1423 };
1424 module_hid_driver(mt_driver);
1425 

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