HID: multitouch: add support for 3M 32"
[linux-2.6.git] / drivers / hid / hid-multitouch.c
1 /*
2  *  HID driver for multitouch panels
3  *
4  *  Copyright (c) 2010-2011 Stephane Chatty <chatty@enac.fr>
5  *  Copyright (c) 2010-2011 Benjamin Tissoires <benjamin.tissoires@gmail.com>
6  *  Copyright (c) 2010-2011 Ecole Nationale de l'Aviation Civile, France
7  *
8  *  This code is partly based on hid-egalax.c:
9  *
10  *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
11  *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
12  *  Copyright (c) 2010 Canonical, Ltd.
13  *
14  *  This code is partly based on hid-3m-pct.c:
15  *
16  *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
17  *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
18  *  Copyright (c) 2010      Canonical, Ltd.
19  *
20  */
21
22 /*
23  * This program is free software; you can redistribute it and/or modify it
24  * under the terms of the GNU General Public License as published by the Free
25  * Software Foundation; either version 2 of the License, or (at your option)
26  * any later version.
27  */
28
29 #include <linux/device.h>
30 #include <linux/hid.h>
31 #include <linux/module.h>
32 #include <linux/slab.h>
33 #include <linux/usb.h>
34 #include <linux/input/mt.h>
35 #include "usbhid/usbhid.h"
36
37
38 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
39 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
40 MODULE_DESCRIPTION("HID multitouch panels");
41 MODULE_LICENSE("GPL");
42
43 #include "hid-ids.h"
44
45 /* quirks to control the device */
46 #define MT_QUIRK_NOT_SEEN_MEANS_UP      (1 << 0)
47 #define MT_QUIRK_SLOT_IS_CONTACTID      (1 << 1)
48 #define MT_QUIRK_CYPRESS                (1 << 2)
49 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  (1 << 3)
50 #define MT_QUIRK_ALWAYS_VALID           (1 << 4)
51 #define MT_QUIRK_VALID_IS_INRANGE       (1 << 5)
52 #define MT_QUIRK_VALID_IS_CONFIDENCE    (1 << 6)
53 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    (1 << 8)
54
55 struct mt_slot {
56         __s32 x, y, p, w, h;
57         __s32 contactid;        /* the device ContactID assigned to this slot */
58         bool touch_state;       /* is the touch valid? */
59         bool seen_in_this_frame;/* has this slot been updated */
60 };
61
62 struct mt_class {
63         __s32 name;     /* MT_CLS */
64         __s32 quirks;
65         __s32 sn_move;  /* Signal/noise ratio for move events */
66         __s32 sn_width; /* Signal/noise ratio for width events */
67         __s32 sn_height;        /* Signal/noise ratio for height events */
68         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
69         __u8 maxcontacts;
70 };
71
72 struct mt_device {
73         struct mt_slot curdata; /* placeholder of incoming data */
74         struct mt_class mtclass;        /* our mt device class */
75         unsigned last_field_index;      /* last field index of the report */
76         unsigned last_slot_field;       /* the last field of a slot */
77         int last_mt_collection; /* last known mt-related collection */
78         __s8 inputmode;         /* InputMode HID feature, -1 if non-existent */
79         __u8 num_received;      /* how many contacts we received */
80         __u8 num_expected;      /* expected last contact index */
81         __u8 maxcontacts;
82         bool curvalid;          /* is the current contact valid? */
83         struct mt_slot *slots;
84 };
85
86 /* classes of device behavior */
87 #define MT_CLS_DEFAULT                          0x0001
88
89 #define MT_CLS_SERIAL                           0x0002
90 #define MT_CLS_CONFIDENCE                       0x0003
91 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
92 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
93 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
94 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
95 #define MT_CLS_DUAL_NSMU_CONTACTID              0x0008
96 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
97
98 /* vendor specific classes */
99 #define MT_CLS_3M                               0x0101
100 #define MT_CLS_CYPRESS                          0x0102
101 #define MT_CLS_EGALAX                           0x0103
102 #define MT_CLS_EGALAX_SERIAL                    0x0104
103
104 #define MT_DEFAULT_MAXCONTACT   10
105
106 /*
107  * these device-dependent functions determine what slot corresponds
108  * to a valid contact that was just read.
109  */
110
111 static int cypress_compute_slot(struct mt_device *td)
112 {
113         if (td->curdata.contactid != 0 || td->num_received == 0)
114                 return td->curdata.contactid;
115         else
116                 return -1;
117 }
118
119 static int find_slot_from_contactid(struct mt_device *td)
120 {
121         int i;
122         for (i = 0; i < td->maxcontacts; ++i) {
123                 if (td->slots[i].contactid == td->curdata.contactid &&
124                         td->slots[i].touch_state)
125                         return i;
126         }
127         for (i = 0; i < td->maxcontacts; ++i) {
128                 if (!td->slots[i].seen_in_this_frame &&
129                         !td->slots[i].touch_state)
130                         return i;
131         }
132         /* should not occurs. If this happens that means
133          * that the device sent more touches that it says
134          * in the report descriptor. It is ignored then. */
135         return -1;
136 }
137
138 struct mt_class mt_classes[] = {
139         { .name = MT_CLS_DEFAULT,
140                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
141         { .name = MT_CLS_SERIAL,
142                 .quirks = MT_QUIRK_ALWAYS_VALID},
143         { .name = MT_CLS_CONFIDENCE,
144                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
145         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
146                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
147                         MT_QUIRK_SLOT_IS_CONTACTID },
148         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
149                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
150                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
151         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
152                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
153                         MT_QUIRK_SLOT_IS_CONTACTID,
154                 .maxcontacts = 2 },
155         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
156                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
157                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
158                 .maxcontacts = 2 },
159         { .name = MT_CLS_DUAL_NSMU_CONTACTID,
160                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
161                         MT_QUIRK_SLOT_IS_CONTACTID,
162                 .maxcontacts = 2 },
163         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
164                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
165                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
166
167         /*
168          * vendor specific classes
169          */
170         { .name = MT_CLS_3M,
171                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
172                         MT_QUIRK_SLOT_IS_CONTACTID,
173                 .sn_move = 2048,
174                 .sn_width = 128,
175                 .sn_height = 128 },
176         { .name = MT_CLS_CYPRESS,
177                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
178                         MT_QUIRK_CYPRESS,
179                 .maxcontacts = 10 },
180         { .name = MT_CLS_EGALAX,
181                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
182                         MT_QUIRK_VALID_IS_INRANGE,
183                 .sn_move = 4096,
184                 .sn_pressure = 32,
185         },
186         { .name = MT_CLS_EGALAX_SERIAL,
187                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
188                         MT_QUIRK_ALWAYS_VALID,
189                 .sn_move = 4096,
190                 .sn_pressure = 32,
191         },
192
193         { }
194 };
195
196 static ssize_t mt_show_quirks(struct device *dev,
197                            struct device_attribute *attr,
198                            char *buf)
199 {
200         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
201         struct mt_device *td = hid_get_drvdata(hdev);
202
203         return sprintf(buf, "%u\n", td->mtclass.quirks);
204 }
205
206 static ssize_t mt_set_quirks(struct device *dev,
207                           struct device_attribute *attr,
208                           const char *buf, size_t count)
209 {
210         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
211         struct mt_device *td = hid_get_drvdata(hdev);
212
213         unsigned long val;
214
215         if (kstrtoul(buf, 0, &val))
216                 return -EINVAL;
217
218         td->mtclass.quirks = val;
219
220         return count;
221 }
222
223 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
224
225 static struct attribute *sysfs_attrs[] = {
226         &dev_attr_quirks.attr,
227         NULL
228 };
229
230 static struct attribute_group mt_attribute_group = {
231         .attrs = sysfs_attrs
232 };
233
234 static void mt_feature_mapping(struct hid_device *hdev,
235                 struct hid_field *field, struct hid_usage *usage)
236 {
237         struct mt_device *td = hid_get_drvdata(hdev);
238
239         switch (usage->hid) {
240         case HID_DG_INPUTMODE:
241                 td->inputmode = field->report->id;
242                 break;
243         case HID_DG_CONTACTMAX:
244                 td->maxcontacts = field->value[0];
245                 if (td->mtclass.maxcontacts)
246                         /* check if the maxcontacts is given by the class */
247                         td->maxcontacts = td->mtclass.maxcontacts;
248
249                 break;
250         }
251 }
252
253 static void set_abs(struct input_dev *input, unsigned int code,
254                 struct hid_field *field, int snratio)
255 {
256         int fmin = field->logical_minimum;
257         int fmax = field->logical_maximum;
258         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
259         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
260 }
261
262 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
263                 struct hid_field *field, struct hid_usage *usage,
264                 unsigned long **bit, int *max)
265 {
266         struct mt_device *td = hid_get_drvdata(hdev);
267         struct mt_class *cls = &td->mtclass;
268
269         /* Only map fields from TouchScreen or TouchPad collections.
270          * We need to ignore fields that belong to other collections
271          * such as Mouse that might have the same GenericDesktop usages. */
272         if (field->application == HID_DG_TOUCHSCREEN)
273                 set_bit(INPUT_PROP_DIRECT, hi->input->propbit);
274         else if (field->application == HID_DG_TOUCHPAD)
275                 set_bit(INPUT_PROP_POINTER, hi->input->propbit);
276         else
277                 return 0;
278
279         /* eGalax devices provide a Digitizer.Stylus input which overrides
280          * the correct Digitizers.Finger X/Y ranges.
281          * Let's just ignore this input. */
282         if (field->physical == HID_DG_STYLUS)
283                 return -1;
284
285         switch (usage->hid & HID_USAGE_PAGE) {
286
287         case HID_UP_GENDESK:
288                 switch (usage->hid) {
289                 case HID_GD_X:
290                         hid_map_usage(hi, usage, bit, max,
291                                         EV_ABS, ABS_MT_POSITION_X);
292                         set_abs(hi->input, ABS_MT_POSITION_X, field,
293                                 cls->sn_move);
294                         /* touchscreen emulation */
295                         set_abs(hi->input, ABS_X, field, cls->sn_move);
296                         if (td->last_mt_collection == usage->collection_index) {
297                                 td->last_slot_field = usage->hid;
298                                 td->last_field_index = field->index;
299                         }
300                         return 1;
301                 case HID_GD_Y:
302                         hid_map_usage(hi, usage, bit, max,
303                                         EV_ABS, ABS_MT_POSITION_Y);
304                         set_abs(hi->input, ABS_MT_POSITION_Y, field,
305                                 cls->sn_move);
306                         /* touchscreen emulation */
307                         set_abs(hi->input, ABS_Y, field, cls->sn_move);
308                         if (td->last_mt_collection == usage->collection_index) {
309                                 td->last_slot_field = usage->hid;
310                                 td->last_field_index = field->index;
311                         }
312                         return 1;
313                 }
314                 return 0;
315
316         case HID_UP_DIGITIZER:
317                 switch (usage->hid) {
318                 case HID_DG_INRANGE:
319                         if (td->last_mt_collection == usage->collection_index) {
320                                 td->last_slot_field = usage->hid;
321                                 td->last_field_index = field->index;
322                         }
323                         return 1;
324                 case HID_DG_CONFIDENCE:
325                         if (td->last_mt_collection == usage->collection_index) {
326                                 td->last_slot_field = usage->hid;
327                                 td->last_field_index = field->index;
328                         }
329                         return 1;
330                 case HID_DG_TIPSWITCH:
331                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
332                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
333                         if (td->last_mt_collection == usage->collection_index) {
334                                 td->last_slot_field = usage->hid;
335                                 td->last_field_index = field->index;
336                         }
337                         return 1;
338                 case HID_DG_CONTACTID:
339                         if (!td->maxcontacts)
340                                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
341                         input_mt_init_slots(hi->input, td->maxcontacts);
342                         td->last_slot_field = usage->hid;
343                         td->last_field_index = field->index;
344                         td->last_mt_collection = usage->collection_index;
345                         return 1;
346                 case HID_DG_WIDTH:
347                         hid_map_usage(hi, usage, bit, max,
348                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
349                         set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
350                                 cls->sn_width);
351                         if (td->last_mt_collection == usage->collection_index) {
352                                 td->last_slot_field = usage->hid;
353                                 td->last_field_index = field->index;
354                         }
355                         return 1;
356                 case HID_DG_HEIGHT:
357                         hid_map_usage(hi, usage, bit, max,
358                                         EV_ABS, ABS_MT_TOUCH_MINOR);
359                         set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
360                                 cls->sn_height);
361                         input_set_abs_params(hi->input,
362                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
363                         if (td->last_mt_collection == usage->collection_index) {
364                                 td->last_slot_field = usage->hid;
365                                 td->last_field_index = field->index;
366                         }
367                         return 1;
368                 case HID_DG_TIPPRESSURE:
369                         hid_map_usage(hi, usage, bit, max,
370                                         EV_ABS, ABS_MT_PRESSURE);
371                         set_abs(hi->input, ABS_MT_PRESSURE, field,
372                                 cls->sn_pressure);
373                         /* touchscreen emulation */
374                         set_abs(hi->input, ABS_PRESSURE, field,
375                                 cls->sn_pressure);
376                         if (td->last_mt_collection == usage->collection_index) {
377                                 td->last_slot_field = usage->hid;
378                                 td->last_field_index = field->index;
379                         }
380                         return 1;
381                 case HID_DG_CONTACTCOUNT:
382                         if (td->last_mt_collection == usage->collection_index)
383                                 td->last_field_index = field->index;
384                         return 1;
385                 case HID_DG_CONTACTMAX:
386                         /* we don't set td->last_slot_field as contactcount and
387                          * contact max are global to the report */
388                         if (td->last_mt_collection == usage->collection_index)
389                                 td->last_field_index = field->index;
390                         return -1;
391                 }
392                 /* let hid-input decide for the others */
393                 return 0;
394
395         case 0xff000000:
396                 /* we do not want to map these: no input-oriented meaning */
397                 return -1;
398         }
399
400         return 0;
401 }
402
403 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
404                 struct hid_field *field, struct hid_usage *usage,
405                 unsigned long **bit, int *max)
406 {
407         if (usage->type == EV_KEY || usage->type == EV_ABS)
408                 set_bit(usage->type, hi->input->evbit);
409
410         return -1;
411 }
412
413 static int mt_compute_slot(struct mt_device *td)
414 {
415         __s32 quirks = td->mtclass.quirks;
416
417         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
418                 return td->curdata.contactid;
419
420         if (quirks & MT_QUIRK_CYPRESS)
421                 return cypress_compute_slot(td);
422
423         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
424                 return td->num_received;
425
426         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
427                 return td->curdata.contactid - 1;
428
429         return find_slot_from_contactid(td);
430 }
431
432 /*
433  * this function is called when a whole contact has been processed,
434  * so that it can assign it to a slot and store the data there
435  */
436 static void mt_complete_slot(struct mt_device *td)
437 {
438         td->curdata.seen_in_this_frame = true;
439         if (td->curvalid) {
440                 int slotnum = mt_compute_slot(td);
441
442                 if (slotnum >= 0 && slotnum < td->maxcontacts)
443                         td->slots[slotnum] = td->curdata;
444         }
445         td->num_received++;
446 }
447
448
449 /*
450  * this function is called when a whole packet has been received and processed,
451  * so that it can decide what to send to the input layer.
452  */
453 static void mt_emit_event(struct mt_device *td, struct input_dev *input)
454 {
455         int i;
456
457         for (i = 0; i < td->maxcontacts; ++i) {
458                 struct mt_slot *s = &(td->slots[i]);
459                 if ((td->mtclass.quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) &&
460                         !s->seen_in_this_frame) {
461                         s->touch_state = false;
462                 }
463
464                 input_mt_slot(input, i);
465                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
466                         s->touch_state);
467                 if (s->touch_state) {
468                         /* this finger is on the screen */
469                         int wide = (s->w > s->h);
470                         /* divided by two to match visual scale of touch */
471                         int major = max(s->w, s->h) >> 1;
472                         int minor = min(s->w, s->h) >> 1;
473
474                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
475                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
476                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
477                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
478                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
479                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
480                 }
481                 s->seen_in_this_frame = false;
482
483         }
484
485         input_mt_report_pointer_emulation(input, true);
486         input_sync(input);
487         td->num_received = 0;
488 }
489
490
491
492 static int mt_event(struct hid_device *hid, struct hid_field *field,
493                                 struct hid_usage *usage, __s32 value)
494 {
495         struct mt_device *td = hid_get_drvdata(hid);
496         __s32 quirks = td->mtclass.quirks;
497
498         if (hid->claimed & HID_CLAIMED_INPUT && td->slots) {
499                 switch (usage->hid) {
500                 case HID_DG_INRANGE:
501                         if (quirks & MT_QUIRK_ALWAYS_VALID)
502                                 td->curvalid = true;
503                         else if (quirks & MT_QUIRK_VALID_IS_INRANGE)
504                                 td->curvalid = value;
505                         break;
506                 case HID_DG_TIPSWITCH:
507                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
508                                 td->curvalid = value;
509                         td->curdata.touch_state = value;
510                         break;
511                 case HID_DG_CONFIDENCE:
512                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
513                                 td->curvalid = value;
514                         break;
515                 case HID_DG_CONTACTID:
516                         td->curdata.contactid = value;
517                         break;
518                 case HID_DG_TIPPRESSURE:
519                         td->curdata.p = value;
520                         break;
521                 case HID_GD_X:
522                         td->curdata.x = value;
523                         break;
524                 case HID_GD_Y:
525                         td->curdata.y = value;
526                         break;
527                 case HID_DG_WIDTH:
528                         td->curdata.w = value;
529                         break;
530                 case HID_DG_HEIGHT:
531                         td->curdata.h = value;
532                         break;
533                 case HID_DG_CONTACTCOUNT:
534                         /*
535                          * Includes multi-packet support where subsequent
536                          * packets are sent with zero contactcount.
537                          */
538                         if (value)
539                                 td->num_expected = value;
540                         break;
541
542                 default:
543                         /* fallback to the generic hidinput handling */
544                         return 0;
545                 }
546
547                 if (usage->hid == td->last_slot_field) {
548                         mt_complete_slot(td);
549                 }
550
551                 if (field->index == td->last_field_index
552                         && td->num_received >= td->num_expected)
553                         mt_emit_event(td, field->hidinput->input);
554
555         }
556
557         /* we have handled the hidinput part, now remains hiddev */
558         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
559                 hid->hiddev_hid_event(hid, field, usage, value);
560
561         return 1;
562 }
563
564 static void mt_set_input_mode(struct hid_device *hdev)
565 {
566         struct mt_device *td = hid_get_drvdata(hdev);
567         struct hid_report *r;
568         struct hid_report_enum *re;
569
570         if (td->inputmode < 0)
571                 return;
572
573         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
574         r = re->report_id_hash[td->inputmode];
575         if (r) {
576                 r->field[0]->value[0] = 0x02;
577                 usbhid_submit_report(hdev, r, USB_DIR_OUT);
578         }
579 }
580
581 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
582 {
583         int ret, i;
584         struct mt_device *td;
585         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
586
587         for (i = 0; mt_classes[i].name ; i++) {
588                 if (id->driver_data == mt_classes[i].name) {
589                         mtclass = &(mt_classes[i]);
590                         break;
591                 }
592         }
593
594         /* This allows the driver to correctly support devices
595          * that emit events over several HID messages.
596          */
597         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
598
599         td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
600         if (!td) {
601                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
602                 return -ENOMEM;
603         }
604         td->mtclass = *mtclass;
605         td->inputmode = -1;
606         td->last_mt_collection = -1;
607         hid_set_drvdata(hdev, td);
608
609         ret = hid_parse(hdev);
610         if (ret != 0)
611                 goto fail;
612
613         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
614         if (ret)
615                 goto fail;
616
617         td->slots = kzalloc(td->maxcontacts * sizeof(struct mt_slot),
618                                 GFP_KERNEL);
619         if (!td->slots) {
620                 dev_err(&hdev->dev, "cannot allocate multitouch slots\n");
621                 hid_hw_stop(hdev);
622                 ret = -ENOMEM;
623                 goto fail;
624         }
625
626         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
627
628         mt_set_input_mode(hdev);
629
630         return 0;
631
632 fail:
633         kfree(td);
634         return ret;
635 }
636
637 #ifdef CONFIG_PM
638 static int mt_reset_resume(struct hid_device *hdev)
639 {
640         mt_set_input_mode(hdev);
641         return 0;
642 }
643 #endif
644
645 static void mt_remove(struct hid_device *hdev)
646 {
647         struct mt_device *td = hid_get_drvdata(hdev);
648         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
649         hid_hw_stop(hdev);
650         kfree(td->slots);
651         kfree(td);
652         hid_set_drvdata(hdev, NULL);
653 }
654
655 static const struct hid_device_id mt_devices[] = {
656
657         /* 3M panels */
658         { .driver_data = MT_CLS_3M,
659                 HID_USB_DEVICE(USB_VENDOR_ID_3M,
660                         USB_DEVICE_ID_3M1968) },
661         { .driver_data = MT_CLS_3M,
662                 HID_USB_DEVICE(USB_VENDOR_ID_3M,
663                         USB_DEVICE_ID_3M2256) },
664         { .driver_data = MT_CLS_3M,
665                 HID_USB_DEVICE(USB_VENDOR_ID_3M,
666                         USB_DEVICE_ID_3M3266) },
667
668         /* ActionStar panels */
669         { .driver_data = MT_CLS_DEFAULT,
670                 HID_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
671                         USB_DEVICE_ID_ACTIONSTAR_1011) },
672
673         /* Atmel panels */
674         { .driver_data = MT_CLS_SERIAL,
675                 HID_USB_DEVICE(USB_VENDOR_ID_ATMEL,
676                         USB_DEVICE_ID_ATMEL_MULTITOUCH) },
677
678         /* Cando panels */
679         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
680                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
681                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
682         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
683                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
684                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
685         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
686                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
687                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
688         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
689                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
690                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
691
692         /* Chunghwa Telecom touch panels */
693         {  .driver_data = MT_CLS_DEFAULT,
694                 HID_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
695                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
696
697         /* CVTouch panels */
698         { .driver_data = MT_CLS_DEFAULT,
699                 HID_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
700                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
701
702         /* Cypress panel */
703         { .driver_data = MT_CLS_CYPRESS,
704                 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
705                         USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
706
707         /* eGalax devices (resistive) */
708         { .driver_data = MT_CLS_EGALAX,
709                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
710                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
711         { .driver_data = MT_CLS_EGALAX,
712                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
713                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
714
715         /* eGalax devices (capacitive) */
716         { .driver_data = MT_CLS_EGALAX,
717                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
718                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
719         { .driver_data = MT_CLS_EGALAX,
720                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
721                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
722         { .driver_data = MT_CLS_EGALAX,
723                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
724                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
725         { .driver_data = MT_CLS_EGALAX,
726                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
727                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
728         { .driver_data = MT_CLS_EGALAX,
729                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
730                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
731         { .driver_data = MT_CLS_EGALAX_SERIAL,
732                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
733                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
734
735         /* Elo TouchSystems IntelliTouch Plus panel */
736         { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID,
737                 HID_USB_DEVICE(USB_VENDOR_ID_ELO,
738                         USB_DEVICE_ID_ELO_TS2515) },
739
740         /* GeneralTouch panel */
741         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
742                 HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
743                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
744
745         /* GoodTouch panels */
746         { .driver_data = MT_CLS_DEFAULT,
747                 HID_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
748                         USB_DEVICE_ID_GOODTOUCH_000f) },
749
750         /* Hanvon panels */
751         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
752                 HID_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
753                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
754
755         /* Ideacom panel */
756         { .driver_data = MT_CLS_SERIAL,
757                 HID_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
758                         USB_DEVICE_ID_IDEACOM_IDC6650) },
759
760         /* Ilitek dual touch panel */
761         {  .driver_data = MT_CLS_DEFAULT,
762                 HID_USB_DEVICE(USB_VENDOR_ID_ILITEK,
763                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
764
765         /* IRTOUCH panels */
766         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
767                 HID_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
768                         USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
769
770         /* LG Display panels */
771         { .driver_data = MT_CLS_DEFAULT,
772                 HID_USB_DEVICE(USB_VENDOR_ID_LG,
773                         USB_DEVICE_ID_LG_MULTITOUCH) },
774
775         /* Lumio panels */
776         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
777                 HID_USB_DEVICE(USB_VENDOR_ID_LUMIO,
778                         USB_DEVICE_ID_CRYSTALTOUCH) },
779         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
780                 HID_USB_DEVICE(USB_VENDOR_ID_LUMIO,
781                         USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
782
783         /* MosArt panels */
784         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
785                 HID_USB_DEVICE(USB_VENDOR_ID_ASUS,
786                         USB_DEVICE_ID_ASUS_T91MT)},
787         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
788                 HID_USB_DEVICE(USB_VENDOR_ID_ASUS,
789                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
790         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
791                 HID_USB_DEVICE(USB_VENDOR_ID_TURBOX,
792                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
793
794         /* PenMount panels */
795         { .driver_data = MT_CLS_CONFIDENCE,
796                 HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
797                         USB_DEVICE_ID_PENMOUNT_PCI) },
798
799         /* PixArt optical touch screen */
800         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
801                 HID_USB_DEVICE(USB_VENDOR_ID_PIXART,
802                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
803         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
804                 HID_USB_DEVICE(USB_VENDOR_ID_PIXART,
805                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
806         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
807                 HID_USB_DEVICE(USB_VENDOR_ID_PIXART,
808                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
809
810         /* PixCir-based panels */
811         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
812                 HID_USB_DEVICE(USB_VENDOR_ID_HANVON,
813                         USB_DEVICE_ID_HANVON_MULTITOUCH) },
814         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
815                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
816                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
817
818         /* Quanta-based panels */
819         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
820                 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
821                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
822         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
823                 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
824                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
825         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
826                 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
827                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
828
829         /* Stantum panels */
830         { .driver_data = MT_CLS_CONFIDENCE,
831                 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM,
832                         USB_DEVICE_ID_MTP)},
833         { .driver_data = MT_CLS_CONFIDENCE,
834                 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
835                         USB_DEVICE_ID_MTP_STM)},
836         { .driver_data = MT_CLS_CONFIDENCE,
837                 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
838                         USB_DEVICE_ID_MTP_SITRONIX)},
839
840         /* Touch International panels */
841         { .driver_data = MT_CLS_DEFAULT,
842                 HID_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
843                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
844
845         /* Unitec panels */
846         { .driver_data = MT_CLS_DEFAULT,
847                 HID_USB_DEVICE(USB_VENDOR_ID_UNITEC,
848                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
849         { .driver_data = MT_CLS_DEFAULT,
850                 HID_USB_DEVICE(USB_VENDOR_ID_UNITEC,
851                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
852         /* XAT */
853         { .driver_data = MT_CLS_DEFAULT,
854                 HID_USB_DEVICE(USB_VENDOR_ID_XAT,
855                         USB_DEVICE_ID_XAT_CSR) },
856
857         { }
858 };
859 MODULE_DEVICE_TABLE(hid, mt_devices);
860
861 static const struct hid_usage_id mt_grabbed_usages[] = {
862         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
863         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
864 };
865
866 static struct hid_driver mt_driver = {
867         .name = "hid-multitouch",
868         .id_table = mt_devices,
869         .probe = mt_probe,
870         .remove = mt_remove,
871         .input_mapping = mt_input_mapping,
872         .input_mapped = mt_input_mapped,
873         .feature_mapping = mt_feature_mapping,
874         .usage_table = mt_grabbed_usages,
875         .event = mt_event,
876 #ifdef CONFIG_PM
877         .reset_resume = mt_reset_resume,
878 #endif
879 };
880
881 static int __init mt_init(void)
882 {
883         return hid_register_driver(&mt_driver);
884 }
885
886 static void __exit mt_exit(void)
887 {
888         hid_unregister_driver(&mt_driver);
889 }
890
891 module_init(mt_init);
892 module_exit(mt_exit);