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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 = to_hid_device(dev);
276         struct mt_device *td = hid_get_drvdata(hdev);
277 
278         return sprintf(buf, "%u\n", td->mtclass.quirks);
279 }
280 
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 = to_hid_device(dev);
286         struct mt_device *td = hid_get_drvdata(hdev);
287 
288         unsigned long val;
289 
290         if (kstrtoul(buf, 0, &val))
291                 return -EINVAL;
292 
293         td->mtclass.quirks = val;
294 
295         if (td->cc_index < 0)
296                 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
297 
298         return count;
299 }
300 
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_get_feature(struct hid_device *hdev, struct hid_report *report)
313 {
314         struct mt_device *td = hid_get_drvdata(hdev);
315         int ret, size = hid_report_len(report);
316         u8 *buf;
317 
318         /*
319          * Only fetch the feature report if initial reports are not already
320          * been retrieved. Currently this is only done for Windows 8 touch
321          * devices.
322          */
323         if (!(hdev->quirks & HID_QUIRK_NO_INIT_REPORTS))
324                 return;
325         if (td->mtclass.name != MT_CLS_WIN_8)
326                 return;
327 
328         buf = hid_alloc_report_buf(report, GFP_KERNEL);
329         if (!buf)
330                 return;
331 
332         ret = hid_hw_raw_request(hdev, report->id, buf, size,
333                                  HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
334         if (ret < 0) {
335                 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
336                          report->id);
337         } else {
338                 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
339                                            size, 0);
340                 if (ret)
341                         dev_warn(&hdev->dev, "failed to report feature\n");
342         }
343 
344         kfree(buf);
345 }
346 
347 static void mt_feature_mapping(struct hid_device *hdev,
348                 struct hid_field *field, struct hid_usage *usage)
349 {
350         struct mt_device *td = hid_get_drvdata(hdev);
351 
352         switch (usage->hid) {
353         case HID_DG_INPUTMODE:
354                 /* Ignore if value index is out of bounds. */
355                 if (usage->usage_index >= field->report_count) {
356                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
357                         break;
358                 }
359 
360                 if (td->inputmode < 0) {
361                         td->inputmode = field->report->id;
362                         td->inputmode_index = usage->usage_index;
363                 } else {
364                         /*
365                          * Some elan panels wrongly declare 2 input mode
366                          * features, and silently ignore when we set the
367                          * value in the second field. Skip the second feature
368                          * and hope for the best.
369                          */
370                         dev_info(&hdev->dev,
371                                  "Ignoring the extra HID_DG_INPUTMODE\n");
372                 }
373 
374                 break;
375         case HID_DG_CONTACTMAX:
376                 mt_get_feature(hdev, field->report);
377 
378                 td->maxcontact_report_id = field->report->id;
379                 td->maxcontacts = field->value[0];
380                 if (!td->maxcontacts &&
381                     field->logical_maximum <= MT_MAX_MAXCONTACT)
382                         td->maxcontacts = field->logical_maximum;
383                 if (td->mtclass.maxcontacts)
384                         /* check if the maxcontacts is given by the class */
385                         td->maxcontacts = td->mtclass.maxcontacts;
386 
387                 break;
388         case HID_DG_BUTTONTYPE:
389                 if (usage->usage_index >= field->report_count) {
390                         dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
391                         break;
392                 }
393 
394                 mt_get_feature(hdev, field->report);
395                 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
396                         td->is_buttonpad = true;
397 
398                 break;
399         }
400 }
401 
402 static void set_abs(struct input_dev *input, unsigned int code,
403                 struct hid_field *field, int snratio)
404 {
405         int fmin = field->logical_minimum;
406         int fmax = field->logical_maximum;
407         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
408         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
409         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
410 }
411 
412 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
413                 struct hid_input *hi)
414 {
415         struct mt_fields *f = td->fields;
416 
417         if (f->length >= HID_MAX_FIELDS)
418                 return;
419 
420         f->usages[f->length++] = usage->hid;
421 }
422 
423 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
424                 struct hid_field *field, struct hid_usage *usage,
425                 unsigned long **bit, int *max)
426 {
427         struct mt_device *td = hid_get_drvdata(hdev);
428         struct mt_class *cls = &td->mtclass;
429         int code;
430         struct hid_usage *prev_usage = NULL;
431 
432         if (field->application == HID_DG_TOUCHSCREEN)
433                 td->mt_flags |= INPUT_MT_DIRECT;
434 
435         /*
436          * Model touchscreens providing buttons as touchpads.
437          */
438         if (field->application == HID_DG_TOUCHPAD ||
439             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
440                 td->mt_flags |= INPUT_MT_POINTER;
441                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
442         }
443 
444         /* count the buttons on touchpads */
445         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
446                 td->buttons_count++;
447 
448         if (usage->usage_index)
449                 prev_usage = &field->usage[usage->usage_index - 1];
450 
451         switch (usage->hid & HID_USAGE_PAGE) {
452 
453         case HID_UP_GENDESK:
454                 switch (usage->hid) {
455                 case HID_GD_X:
456                         if (prev_usage && (prev_usage->hid == usage->hid)) {
457                                 hid_map_usage(hi, usage, bit, max,
458                                         EV_ABS, ABS_MT_TOOL_X);
459                                 set_abs(hi->input, ABS_MT_TOOL_X, field,
460                                         cls->sn_move);
461                         } else {
462                                 hid_map_usage(hi, usage, bit, max,
463                                         EV_ABS, ABS_MT_POSITION_X);
464                                 set_abs(hi->input, ABS_MT_POSITION_X, field,
465                                         cls->sn_move);
466                         }
467 
468                         mt_store_field(usage, td, hi);
469                         return 1;
470                 case HID_GD_Y:
471                         if (prev_usage && (prev_usage->hid == usage->hid)) {
472                                 hid_map_usage(hi, usage, bit, max,
473                                         EV_ABS, ABS_MT_TOOL_Y);
474                                 set_abs(hi->input, ABS_MT_TOOL_Y, field,
475                                         cls->sn_move);
476                         } else {
477                                 hid_map_usage(hi, usage, bit, max,
478                                         EV_ABS, ABS_MT_POSITION_Y);
479                                 set_abs(hi->input, ABS_MT_POSITION_Y, field,
480                                         cls->sn_move);
481                         }
482 
483                         mt_store_field(usage, td, hi);
484                         return 1;
485                 }
486                 return 0;
487 
488         case HID_UP_DIGITIZER:
489                 switch (usage->hid) {
490                 case HID_DG_INRANGE:
491                         if (cls->quirks & MT_QUIRK_HOVERING) {
492                                 hid_map_usage(hi, usage, bit, max,
493                                         EV_ABS, ABS_MT_DISTANCE);
494                                 input_set_abs_params(hi->input,
495                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
496                         }
497                         mt_store_field(usage, td, hi);
498                         return 1;
499                 case HID_DG_CONFIDENCE:
500                         if (cls->name == MT_CLS_WIN_8 &&
501                                 field->application == HID_DG_TOUCHPAD) {
502                                 cls->quirks &= ~MT_QUIRK_ALWAYS_VALID;
503                                 cls->quirks |= MT_QUIRK_VALID_IS_CONFIDENCE;
504                         }
505                         mt_store_field(usage, td, hi);
506                         return 1;
507                 case HID_DG_TIPSWITCH:
508                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
509                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
510                         mt_store_field(usage, td, hi);
511                         return 1;
512                 case HID_DG_CONTACTID:
513                         mt_store_field(usage, td, hi);
514                         td->touches_by_report++;
515                         td->mt_report_id = field->report->id;
516                         return 1;
517                 case HID_DG_WIDTH:
518                         hid_map_usage(hi, usage, bit, max,
519                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
520                         if (!(cls->quirks & MT_QUIRK_NO_AREA))
521                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
522                                         cls->sn_width);
523                         mt_store_field(usage, td, hi);
524                         return 1;
525                 case HID_DG_HEIGHT:
526                         hid_map_usage(hi, usage, bit, max,
527                                         EV_ABS, ABS_MT_TOUCH_MINOR);
528                         if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
529                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
530                                         cls->sn_height);
531                                 input_set_abs_params(hi->input,
532                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
533                         }
534                         mt_store_field(usage, td, hi);
535                         return 1;
536                 case HID_DG_TIPPRESSURE:
537                         hid_map_usage(hi, usage, bit, max,
538                                         EV_ABS, ABS_MT_PRESSURE);
539                         set_abs(hi->input, ABS_MT_PRESSURE, field,
540                                 cls->sn_pressure);
541                         mt_store_field(usage, td, hi);
542                         return 1;
543                 case HID_DG_CONTACTCOUNT:
544                         /* Ignore if indexes are out of bounds. */
545                         if (field->index >= field->report->maxfield ||
546                             usage->usage_index >= field->report_count)
547                                 return 1;
548                         td->cc_index = field->index;
549                         td->cc_value_index = usage->usage_index;
550                         return 1;
551                 case HID_DG_CONTACTMAX:
552                         /* we don't set td->last_slot_field as contactcount and
553                          * contact max are global to the report */
554                         return -1;
555                 case HID_DG_TOUCH:
556                         /* Legacy devices use TIPSWITCH and not TOUCH.
557                          * Let's just ignore this field. */
558                         return -1;
559                 }
560                 /* let hid-input decide for the others */
561                 return 0;
562 
563         case HID_UP_BUTTON:
564                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
565                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
566                 input_set_capability(hi->input, EV_KEY, code);
567                 return 1;
568 
569         case 0xff000000:
570                 /* we do not want to map these: no input-oriented meaning */
571                 return -1;
572         }
573 
574         return 0;
575 }
576 
577 static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
578                 struct hid_field *field, struct hid_usage *usage,
579                 unsigned long **bit, int *max)
580 {
581         if (usage->type == EV_KEY || usage->type == EV_ABS)
582                 set_bit(usage->type, hi->input->evbit);
583 
584         return -1;
585 }
586 
587 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
588 {
589         __s32 quirks = td->mtclass.quirks;
590 
591         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
592                 return td->curdata.contactid;
593 
594         if (quirks & MT_QUIRK_CYPRESS)
595                 return cypress_compute_slot(td);
596 
597         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
598                 return td->num_received;
599 
600         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
601                 return td->curdata.contactid - 1;
602 
603         return input_mt_get_slot_by_key(input, td->curdata.contactid);
604 }
605 
606 /*
607  * this function is called when a whole contact has been processed,
608  * so that it can assign it to a slot and store the data there
609  */
610 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
611 {
612         if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
613             td->num_received >= td->num_expected)
614                 return;
615 
616         if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
617                 int slotnum = mt_compute_slot(td, input);
618                 struct mt_slot *s = &td->curdata;
619                 struct input_mt *mt = input->mt;
620 
621                 if (slotnum < 0 || slotnum >= td->maxcontacts)
622                         return;
623 
624                 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
625                         struct input_mt_slot *slot = &mt->slots[slotnum];
626                         if (input_mt_is_active(slot) &&
627                             input_mt_is_used(mt, slot))
628                                 return;
629                 }
630 
631                 input_mt_slot(input, slotnum);
632                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
633                         s->touch_state || s->inrange_state);
634                 if (s->touch_state || s->inrange_state) {
635                         /* this finger is in proximity of the sensor */
636                         int wide = (s->w > s->h);
637                         /* divided by two to match visual scale of touch */
638                         int major = max(s->w, s->h) >> 1;
639                         int minor = min(s->w, s->h) >> 1;
640 
641                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
642                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
643                         input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
644                         input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
645                         input_event(input, EV_ABS, ABS_MT_DISTANCE,
646                                 !s->touch_state);
647                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
648                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
649                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
650                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
651                 }
652         }
653 
654         td->num_received++;
655 }
656 
657 /*
658  * this function is called when a whole packet has been received and processed,
659  * so that it can decide what to send to the input layer.
660  */
661 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
662 {
663         input_mt_sync_frame(input);
664         input_sync(input);
665         td->num_received = 0;
666 }
667 
668 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
669                                 struct hid_usage *usage, __s32 value)
670 {
671         /* we will handle the hidinput part later, now remains hiddev */
672         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
673                 hid->hiddev_hid_event(hid, field, usage, value);
674 
675         return 1;
676 }
677 
678 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
679                                 struct hid_usage *usage, __s32 value)
680 {
681         struct mt_device *td = hid_get_drvdata(hid);
682         __s32 quirks = td->mtclass.quirks;
683         struct input_dev *input = field->hidinput->input;
684 
685         if (hid->claimed & HID_CLAIMED_INPUT) {
686                 switch (usage->hid) {
687                 case HID_DG_INRANGE:
688                         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
689                                 td->curvalid = value;
690                         if (quirks & MT_QUIRK_HOVERING)
691                                 td->curdata.inrange_state = value;
692                         break;
693                 case HID_DG_TIPSWITCH:
694                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
695                                 td->curvalid = value;
696                         td->curdata.touch_state = value;
697                         break;
698                 case HID_DG_CONFIDENCE:
699                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
700                                 td->curvalid = value;
701                         break;
702                 case HID_DG_CONTACTID:
703                         td->curdata.contactid = value;
704                         break;
705                 case HID_DG_TIPPRESSURE:
706                         td->curdata.p = value;
707                         break;
708                 case HID_GD_X:
709                         if (usage->code == ABS_MT_TOOL_X)
710                                 td->curdata.cx = value;
711                         else
712                                 td->curdata.x = value;
713                         break;
714                 case HID_GD_Y:
715                         if (usage->code == ABS_MT_TOOL_Y)
716                                 td->curdata.cy = value;
717                         else
718                                 td->curdata.y = value;
719                         break;
720                 case HID_DG_WIDTH:
721                         td->curdata.w = value;
722                         break;
723                 case HID_DG_HEIGHT:
724                         td->curdata.h = value;
725                         break;
726                 case HID_DG_CONTACTCOUNT:
727                         break;
728                 case HID_DG_TOUCH:
729                         /* do nothing */
730                         break;
731 
732                 default:
733                         if (usage->type)
734                                 input_event(input, usage->type, usage->code,
735                                                 value);
736                         return;
737                 }
738 
739                 if (usage->usage_index + 1 == field->report_count) {
740                         /* we only take into account the last report. */
741                         if (usage->hid == td->last_slot_field)
742                                 mt_complete_slot(td, field->hidinput->input);
743                 }
744 
745         }
746 }
747 
748 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
749 {
750         struct mt_device *td = hid_get_drvdata(hid);
751         struct hid_field *field;
752         unsigned count;
753         int r, n;
754 
755         /*
756          * Includes multi-packet support where subsequent
757          * packets are sent with zero contactcount.
758          */
759         if (td->cc_index >= 0) {
760                 struct hid_field *field = report->field[td->cc_index];
761                 int value = field->value[td->cc_value_index];
762                 if (value)
763                         td->num_expected = value;
764         }
765 
766         for (r = 0; r < report->maxfield; r++) {
767                 field = report->field[r];
768                 count = field->report_count;
769 
770                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
771                         continue;
772 
773                 for (n = 0; n < count; n++)
774                         mt_process_mt_event(hid, field, &field->usage[n],
775                                         field->value[n]);
776         }
777 
778         if (td->num_received >= td->num_expected)
779                 mt_sync_frame(td, report->field[0]->hidinput->input);
780 }
781 
782 static int mt_touch_input_configured(struct hid_device *hdev,
783                                         struct hid_input *hi)
784 {
785         struct mt_device *td = hid_get_drvdata(hdev);
786         struct mt_class *cls = &td->mtclass;
787         struct input_dev *input = hi->input;
788         int ret;
789 
790         if (!td->maxcontacts)
791                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
792 
793         mt_post_parse(td);
794         if (td->serial_maybe)
795                 mt_post_parse_default_settings(td);
796 
797         if (cls->is_indirect)
798                 td->mt_flags |= INPUT_MT_POINTER;
799 
800         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
801                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
802 
803         /* check for clickpads */
804         if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
805                 td->is_buttonpad = true;
806 
807         if (td->is_buttonpad)
808                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
809 
810         ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
811         if (ret)
812                 return ret;
813 
814         td->mt_flags = 0;
815         return 0;
816 }
817 
818 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
819                 struct hid_field *field, struct hid_usage *usage,
820                 unsigned long **bit, int *max)
821 {
822         struct mt_device *td = hid_get_drvdata(hdev);
823 
824         /*
825          * If mtclass.export_all_inputs is not set, only map fields from
826          * TouchScreen or TouchPad collections. We need to ignore fields
827          * that belong to other collections such as Mouse that might have
828          * the same GenericDesktop usages.
829          */
830         if (!td->mtclass.export_all_inputs &&
831             field->application != HID_DG_TOUCHSCREEN &&
832             field->application != HID_DG_PEN &&
833             field->application != HID_DG_TOUCHPAD)
834                 return -1;
835 
836         /*
837          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
838          * for the stylus.
839          * The check for mt_report_id ensures we don't process
840          * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
841          * collection, but within the report ID.
842          */
843         if (field->physical == HID_DG_STYLUS)
844                 return 0;
845         else if ((field->physical == 0) &&
846                  (field->report->id != td->mt_report_id) &&
847                  (td->mt_report_id != -1))
848                 return 0;
849 
850         if (field->application == HID_DG_TOUCHSCREEN ||
851             field->application == HID_DG_TOUCHPAD)
852                 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
853 
854         /* let hid-core decide for the others */
855         return 0;
856 }
857 
858 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
859                 struct hid_field *field, struct hid_usage *usage,
860                 unsigned long **bit, int *max)
861 {
862         /*
863          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
864          * for the stylus.
865          */
866         if (field->physical == HID_DG_STYLUS)
867                 return 0;
868 
869         if (field->application == HID_DG_TOUCHSCREEN ||
870             field->application == HID_DG_TOUCHPAD)
871                 return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
872 
873         /* let hid-core decide for the others */
874         return 0;
875 }
876 
877 static int mt_event(struct hid_device *hid, struct hid_field *field,
878                                 struct hid_usage *usage, __s32 value)
879 {
880         struct mt_device *td = hid_get_drvdata(hid);
881 
882         if (field->report->id == td->mt_report_id)
883                 return mt_touch_event(hid, field, usage, value);
884 
885         return 0;
886 }
887 
888 static void mt_report(struct hid_device *hid, struct hid_report *report)
889 {
890         struct mt_device *td = hid_get_drvdata(hid);
891         struct hid_field *field = report->field[0];
892 
893         if (!(hid->claimed & HID_CLAIMED_INPUT))
894                 return;
895 
896         if (report->id == td->mt_report_id)
897                 return mt_touch_report(hid, report);
898 
899         if (field && field->hidinput && field->hidinput->input)
900                 input_sync(field->hidinput->input);
901 }
902 
903 static void mt_set_input_mode(struct hid_device *hdev)
904 {
905         struct mt_device *td = hid_get_drvdata(hdev);
906         struct hid_report *r;
907         struct hid_report_enum *re;
908         struct mt_class *cls = &td->mtclass;
909         char *buf;
910         int report_len;
911 
912         if (td->inputmode < 0)
913                 return;
914 
915         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
916         r = re->report_id_hash[td->inputmode];
917         if (r) {
918                 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
919                         report_len = hid_report_len(r);
920                         buf = hid_alloc_report_buf(r, GFP_KERNEL);
921                         if (!buf) {
922                                 hid_err(hdev, "failed to allocate buffer for report\n");
923                                 return;
924                         }
925                         hid_hw_raw_request(hdev, r->id, buf, report_len,
926                                            HID_FEATURE_REPORT,
927                                            HID_REQ_GET_REPORT);
928                         kfree(buf);
929                 }
930                 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
931                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
932         }
933 }
934 
935 static void mt_set_maxcontacts(struct hid_device *hdev)
936 {
937         struct mt_device *td = hid_get_drvdata(hdev);
938         struct hid_report *r;
939         struct hid_report_enum *re;
940         int fieldmax, max;
941 
942         if (td->maxcontact_report_id < 0)
943                 return;
944 
945         if (!td->mtclass.maxcontacts)
946                 return;
947 
948         re = &hdev->report_enum[HID_FEATURE_REPORT];
949         r = re->report_id_hash[td->maxcontact_report_id];
950         if (r) {
951                 max = td->mtclass.maxcontacts;
952                 fieldmax = r->field[0]->logical_maximum;
953                 max = min(fieldmax, max);
954                 if (r->field[0]->value[0] != max) {
955                         r->field[0]->value[0] = max;
956                         hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
957                 }
958         }
959 }
960 
961 static void mt_post_parse_default_settings(struct mt_device *td)
962 {
963         __s32 quirks = td->mtclass.quirks;
964 
965         /* unknown serial device needs special quirks */
966         if (td->touches_by_report == 1) {
967                 quirks |= MT_QUIRK_ALWAYS_VALID;
968                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
969                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
970                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
971                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
972         }
973 
974         td->mtclass.quirks = quirks;
975 }
976 
977 static void mt_post_parse(struct mt_device *td)
978 {
979         struct mt_fields *f = td->fields;
980         struct mt_class *cls = &td->mtclass;
981 
982         if (td->touches_by_report > 0) {
983                 int field_count_per_touch = f->length / td->touches_by_report;
984                 td->last_slot_field = f->usages[field_count_per_touch - 1];
985         }
986 
987         if (td->cc_index < 0)
988                 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
989 }
990 
991 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
992 {
993         struct mt_device *td = hid_get_drvdata(hdev);
994         char *name;
995         const char *suffix = NULL;
996         struct hid_field *field = hi->report->field[0];
997         int ret;
998 
999         if (hi->report->id == td->mt_report_id) {
1000                 ret = mt_touch_input_configured(hdev, hi);
1001                 if (ret)
1002                         return ret;
1003         }
1004 
1005         /*
1006          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1007          * for the stylus. Check this first, and then rely on the application
1008          * field.
1009          */
1010         if (hi->report->field[0]->physical == HID_DG_STYLUS) {
1011                 suffix = "Pen";
1012                 /* force BTN_STYLUS to allow tablet matching in udev */
1013                 __set_bit(BTN_STYLUS, hi->input->keybit);
1014         } else {
1015                 switch (field->application) {
1016                 case HID_GD_KEYBOARD:
1017                         suffix = "Keyboard";
1018                         break;
1019                 case HID_GD_KEYPAD:
1020                         suffix = "Keypad";
1021                         break;
1022                 case HID_GD_MOUSE:
1023                         suffix = "Mouse";
1024                         break;
1025                 case HID_DG_STYLUS:
1026                         suffix = "Pen";
1027                         /* force BTN_STYLUS to allow tablet matching in udev */
1028                         __set_bit(BTN_STYLUS, hi->input->keybit);
1029                         break;
1030                 case HID_DG_TOUCHSCREEN:
1031                         /* we do not set suffix = "Touchscreen" */
1032                         break;
1033                 case HID_DG_TOUCHPAD:
1034                         suffix = "Touchpad";
1035                         break;
1036                 case HID_GD_SYSTEM_CONTROL:
1037                         suffix = "System Control";
1038                         break;
1039                 case HID_CP_CONSUMER_CONTROL:
1040                         suffix = "Consumer Control";
1041                         break;
1042                 default:
1043                         suffix = "UNKNOWN";
1044                         break;
1045                 }
1046         }
1047 
1048         if (suffix) {
1049                 name = devm_kzalloc(&hi->input->dev,
1050                                     strlen(hdev->name) + strlen(suffix) + 2,
1051                                     GFP_KERNEL);
1052                 if (name) {
1053                         sprintf(name, "%s %s", hdev->name, suffix);
1054                         hi->input->name = name;
1055                 }
1056         }
1057 
1058         return 0;
1059 }
1060 
1061 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1062 {
1063         int ret, i;
1064         struct mt_device *td;
1065         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1066 
1067         for (i = 0; mt_classes[i].name ; i++) {
1068                 if (id->driver_data == mt_classes[i].name) {
1069                         mtclass = &(mt_classes[i]);
1070                         break;
1071                 }
1072         }
1073 
1074         /* This allows the driver to correctly support devices
1075          * that emit events over several HID messages.
1076          */
1077         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1078 
1079         /*
1080          * This allows the driver to handle different input sensors
1081          * that emits events through different reports on the same HID
1082          * device.
1083          */
1084         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1085         hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
1086 
1087         /*
1088          * Handle special quirks for Windows 8 certified devices.
1089          */
1090         if (id->group == HID_GROUP_MULTITOUCH_WIN_8)
1091                 /*
1092                  * Some multitouch screens do not like to be polled for input
1093                  * reports. Fortunately, the Win8 spec says that all touches
1094                  * should be sent during each report, making the initialization
1095                  * of input reports unnecessary.
1096                  *
1097                  * In addition some touchpads do not behave well if we read
1098                  * all feature reports from them. Instead we prevent
1099                  * initial report fetching and then selectively fetch each
1100                  * report we are interested in.
1101                  */
1102                 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1103 
1104         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1105         if (!td) {
1106                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1107                 return -ENOMEM;
1108         }
1109         td->mtclass = *mtclass;
1110         td->inputmode = -1;
1111         td->maxcontact_report_id = -1;
1112         td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1113         td->cc_index = -1;
1114         td->mt_report_id = -1;
1115         hid_set_drvdata(hdev, td);
1116 
1117         td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
1118                                   GFP_KERNEL);
1119         if (!td->fields) {
1120                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1121                 return -ENOMEM;
1122         }
1123 
1124         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1125                 td->serial_maybe = true;
1126 
1127         ret = hid_parse(hdev);
1128         if (ret != 0)
1129                 return ret;
1130 
1131         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1132         if (ret)
1133                 return ret;
1134 
1135         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1136 
1137         mt_set_maxcontacts(hdev);
1138         mt_set_input_mode(hdev);
1139 
1140         /* release .fields memory as it is not used anymore */
1141         devm_kfree(&hdev->dev, td->fields);
1142         td->fields = NULL;
1143 
1144         return 0;
1145 }
1146 
1147 #ifdef CONFIG_PM
1148 static int mt_reset_resume(struct hid_device *hdev)
1149 {
1150         mt_set_maxcontacts(hdev);
1151         mt_set_input_mode(hdev);
1152         return 0;
1153 }
1154 
1155 static int mt_resume(struct hid_device *hdev)
1156 {
1157         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1158          * It should be safe to send it to other devices too.
1159          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1160 
1161         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1162 
1163         return 0;
1164 }
1165 #endif
1166 
1167 static void mt_remove(struct hid_device *hdev)
1168 {
1169         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1170         hid_hw_stop(hdev);
1171 }
1172 
1173 /*
1174  * This list contains only:
1175  * - VID/PID of products not working with the default multitouch handling
1176  * - 2 generic rules.
1177  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1178  */
1179 static const struct hid_device_id mt_devices[] = {
1180 
1181         /* 3M panels */
1182         { .driver_data = MT_CLS_3M,
1183                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1184                         USB_DEVICE_ID_3M1968) },
1185         { .driver_data = MT_CLS_3M,
1186                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1187                         USB_DEVICE_ID_3M2256) },
1188         { .driver_data = MT_CLS_3M,
1189                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1190                         USB_DEVICE_ID_3M3266) },
1191 
1192         /* Anton devices */
1193         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1194                 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1195                         USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1196 
1197         /* Atmel panels */
1198         { .driver_data = MT_CLS_SERIAL,
1199                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1200                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1201 
1202         /* Baanto multitouch devices */
1203         { .driver_data = MT_CLS_NSMU,
1204                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1205                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1206 
1207         /* Cando panels */
1208         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1209                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1210                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1211         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1212                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1213                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1214 
1215         /* Chunghwa Telecom touch panels */
1216         {  .driver_data = MT_CLS_NSMU,
1217                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1218                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1219 
1220         /* CJTouch panels */
1221         { .driver_data = MT_CLS_NSMU,
1222                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1223                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1224         { .driver_data = MT_CLS_NSMU,
1225                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1226                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1227 
1228         /* CVTouch panels */
1229         { .driver_data = MT_CLS_NSMU,
1230                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1231                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1232 
1233         /* eGalax devices (resistive) */
1234         { .driver_data = MT_CLS_EGALAX,
1235                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1236                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1237         { .driver_data = MT_CLS_EGALAX,
1238                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1239                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1240 
1241         /* eGalax devices (capacitive) */
1242         { .driver_data = MT_CLS_EGALAX_SERIAL,
1243                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1244                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1245         { .driver_data = MT_CLS_EGALAX,
1246                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1247                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1248         { .driver_data = MT_CLS_EGALAX_SERIAL,
1249                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1250                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1251         { .driver_data = MT_CLS_EGALAX_SERIAL,
1252                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1253                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1254         { .driver_data = MT_CLS_EGALAX_SERIAL,
1255                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1256                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1257         { .driver_data = MT_CLS_EGALAX_SERIAL,
1258                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1259                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1260         { .driver_data = MT_CLS_EGALAX,
1261                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1262                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1263         { .driver_data = MT_CLS_EGALAX,
1264                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1265                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1266         { .driver_data = MT_CLS_EGALAX_SERIAL,
1267                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1268                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1269         { .driver_data = MT_CLS_EGALAX,
1270                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1271                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1272         { .driver_data = MT_CLS_EGALAX,
1273                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1274                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1275         { .driver_data = MT_CLS_EGALAX,
1276                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1277                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1278         { .driver_data = MT_CLS_EGALAX,
1279                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1280                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1281         { .driver_data = MT_CLS_EGALAX_SERIAL,
1282                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1283                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1284         { .driver_data = MT_CLS_EGALAX_SERIAL,
1285                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1286                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1287         { .driver_data = MT_CLS_EGALAX_SERIAL,
1288                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1289                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1290 
1291         /* Elitegroup panel */
1292         { .driver_data = MT_CLS_SERIAL,
1293                 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1294                         USB_DEVICE_ID_ELITEGROUP_05D8) },
1295 
1296         /* Flatfrog Panels */
1297         { .driver_data = MT_CLS_FLATFROG,
1298                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1299                         USB_DEVICE_ID_MULTITOUCH_3200) },
1300 
1301         /* FocalTech Panels */
1302         { .driver_data = MT_CLS_SERIAL,
1303                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1304                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1305 
1306         /* GeneralTouch panel */
1307         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1308                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1309                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1310         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1311                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1312                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1313         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1314                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1315                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1316         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1317                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1318                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1319         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1320                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1321                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1322         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1323                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1324                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1325         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1326                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1327                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1328 
1329         /* Gametel game controller */
1330         { .driver_data = MT_CLS_NSMU,
1331                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1332                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1333 
1334         /* GoodTouch panels */
1335         { .driver_data = MT_CLS_NSMU,
1336                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1337                         USB_DEVICE_ID_GOODTOUCH_000f) },
1338 
1339         /* Hanvon panels */
1340         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1341                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1342                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1343 
1344         /* Ilitek dual touch panel */
1345         {  .driver_data = MT_CLS_NSMU,
1346                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1347                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1348 
1349         /* MosArt panels */
1350         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1351                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1352                         USB_DEVICE_ID_ASUS_T91MT)},
1353         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1354                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1355                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1356         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1357                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1358                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1359 
1360         /* Panasonic panels */
1361         { .driver_data = MT_CLS_PANASONIC,
1362                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1363                         USB_DEVICE_ID_PANABOARD_UBT780) },
1364         { .driver_data = MT_CLS_PANASONIC,
1365                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1366                         USB_DEVICE_ID_PANABOARD_UBT880) },
1367 
1368         /* Novatek Panel */
1369         { .driver_data = MT_CLS_NSMU,
1370                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1371                         USB_DEVICE_ID_NOVATEK_PCT) },
1372 
1373         /* PixArt optical touch screen */
1374         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1375                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1376                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1377         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1378                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1379                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1380         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1381                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1382                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1383 
1384         /* PixCir-based panels */
1385         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1386                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1387                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1388 
1389         /* Quanta-based panels */
1390         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1391                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1392                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1393 
1394         /* Stantum panels */
1395         { .driver_data = MT_CLS_CONFIDENCE,
1396                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1397                         USB_DEVICE_ID_MTP_STM)},
1398 
1399         /* TopSeed panels */
1400         { .driver_data = MT_CLS_TOPSEED,
1401                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1402                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1403 
1404         /* Touch International panels */
1405         { .driver_data = MT_CLS_NSMU,
1406                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1407                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1408 
1409         /* Unitec panels */
1410         { .driver_data = MT_CLS_NSMU,
1411                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1412                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1413         { .driver_data = MT_CLS_NSMU,
1414                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1415                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1416 
1417         /* VTL panels */
1418         { .driver_data = MT_CLS_VTL,
1419                 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
1420                         USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
1421 
1422         /* Wistron panels */
1423         { .driver_data = MT_CLS_NSMU,
1424                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1425                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1426 
1427         /* XAT */
1428         { .driver_data = MT_CLS_NSMU,
1429                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1430                         USB_DEVICE_ID_XAT_CSR) },
1431 
1432         /* Xiroku */
1433         { .driver_data = MT_CLS_NSMU,
1434                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1435                         USB_DEVICE_ID_XIROKU_SPX) },
1436         { .driver_data = MT_CLS_NSMU,
1437                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1438                         USB_DEVICE_ID_XIROKU_MPX) },
1439         { .driver_data = MT_CLS_NSMU,
1440                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1441                         USB_DEVICE_ID_XIROKU_CSR) },
1442         { .driver_data = MT_CLS_NSMU,
1443                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1444                         USB_DEVICE_ID_XIROKU_SPX1) },
1445         { .driver_data = MT_CLS_NSMU,
1446                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1447                         USB_DEVICE_ID_XIROKU_MPX1) },
1448         { .driver_data = MT_CLS_NSMU,
1449                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1450                         USB_DEVICE_ID_XIROKU_CSR1) },
1451         { .driver_data = MT_CLS_NSMU,
1452                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1453                         USB_DEVICE_ID_XIROKU_SPX2) },
1454         { .driver_data = MT_CLS_NSMU,
1455                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1456                         USB_DEVICE_ID_XIROKU_MPX2) },
1457         { .driver_data = MT_CLS_NSMU,
1458                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1459                         USB_DEVICE_ID_XIROKU_CSR2) },
1460 
1461         /* Generic MT device */
1462         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1463 
1464         /* Generic Win 8 certified MT device */
1465         {  .driver_data = MT_CLS_WIN_8,
1466                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1467                         HID_ANY_ID, HID_ANY_ID) },
1468         { }
1469 };
1470 MODULE_DEVICE_TABLE(hid, mt_devices);
1471 
1472 static const struct hid_usage_id mt_grabbed_usages[] = {
1473         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1474         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1475 };
1476 
1477 static struct hid_driver mt_driver = {
1478         .name = "hid-multitouch",
1479         .id_table = mt_devices,
1480         .probe = mt_probe,
1481         .remove = mt_remove,
1482         .input_mapping = mt_input_mapping,
1483         .input_mapped = mt_input_mapped,
1484         .input_configured = mt_input_configured,
1485         .feature_mapping = mt_feature_mapping,
1486         .usage_table = mt_grabbed_usages,
1487         .event = mt_event,
1488         .report = mt_report,
1489 #ifdef CONFIG_PM
1490         .reset_resume = mt_reset_resume,
1491         .resume = mt_resume,
1492 #endif
1493 };
1494 module_hid_driver(mt_driver);
1495 

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