Merge branches 'for-4.16/upstream' and 'for-4.15/upstream-fixes' into for-linus
[muen/linux.git] / drivers / hid / wacom_sys.c
1 /*
2  * drivers/input/tablet/wacom_sys.c
3  *
4  *  USB Wacom tablet support - system specific code
5  */
6
7 /*
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  */
13
14 #include "wacom_wac.h"
15 #include "wacom.h"
16 #include <linux/input/mt.h>
17
18 #define WAC_MSG_RETRIES         5
19 #define WAC_CMD_RETRIES         10
20
21 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
22 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
23 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
24
25 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
26                             size_t size, unsigned int retries)
27 {
28         int retval;
29
30         do {
31                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
32                                 HID_REQ_GET_REPORT);
33         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
34
35         if (retval < 0)
36                 hid_err(hdev, "wacom_get_report: ran out of retries "
37                         "(last error = %d)\n", retval);
38
39         return retval;
40 }
41
42 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
43                             size_t size, unsigned int retries)
44 {
45         int retval;
46
47         do {
48                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
49                                 HID_REQ_SET_REPORT);
50         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
51
52         if (retval < 0)
53                 hid_err(hdev, "wacom_set_report: ran out of retries "
54                         "(last error = %d)\n", retval);
55
56         return retval;
57 }
58
59 static void wacom_wac_queue_insert(struct hid_device *hdev,
60                                    struct kfifo_rec_ptr_2 *fifo,
61                                    u8 *raw_data, int size)
62 {
63         bool warned = false;
64
65         while (kfifo_avail(fifo) < size) {
66                 if (!warned)
67                         hid_warn(hdev, "%s: kfifo has filled, starting to drop events\n", __func__);
68                 warned = true;
69
70                 kfifo_skip(fifo);
71         }
72
73         kfifo_in(fifo, raw_data, size);
74 }
75
76 static void wacom_wac_queue_flush(struct hid_device *hdev,
77                                   struct kfifo_rec_ptr_2 *fifo)
78 {
79         while (!kfifo_is_empty(fifo)) {
80                 u8 buf[WACOM_PKGLEN_MAX];
81                 int size;
82                 int err;
83
84                 size = kfifo_out(fifo, buf, sizeof(buf));
85                 err = hid_report_raw_event(hdev, HID_INPUT_REPORT, buf, size, false);
86                 if (err) {
87                         hid_warn(hdev, "%s: unable to flush event due to error %d\n",
88                                  __func__, err);
89                 }
90         }
91 }
92
93 static int wacom_wac_pen_serial_enforce(struct hid_device *hdev,
94                 struct hid_report *report, u8 *raw_data, int size)
95 {
96         struct wacom *wacom = hid_get_drvdata(hdev);
97         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
98         struct wacom_features *features = &wacom_wac->features;
99         bool flush = false;
100         bool insert = false;
101         int i, j;
102
103         if (wacom_wac->serial[0] || !(features->quirks & WACOM_QUIRK_TOOLSERIAL))
104                 return 0;
105
106         /* Queue events which have invalid tool type or serial number */
107         for (i = 0; i < report->maxfield; i++) {
108                 for (j = 0; j < report->field[i]->maxusage; j++) {
109                         struct hid_field *field = report->field[i];
110                         struct hid_usage *usage = &field->usage[j];
111                         unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
112                         unsigned int offset;
113                         unsigned int size;
114                         unsigned int value;
115
116                         if (equivalent_usage != HID_DG_INRANGE &&
117                             equivalent_usage != HID_DG_TOOLSERIALNUMBER &&
118                             equivalent_usage != WACOM_HID_WD_SERIALHI &&
119                             equivalent_usage != WACOM_HID_WD_TOOLTYPE)
120                                 continue;
121
122                         offset = field->report_offset;
123                         size = field->report_size;
124                         value = hid_field_extract(hdev, raw_data+1, offset + j * size, size);
125
126                         /* If we go out of range, we need to flush the queue ASAP */
127                         if (equivalent_usage == HID_DG_INRANGE)
128                                 value = !value;
129
130                         if (value) {
131                                 flush = true;
132                                 switch (equivalent_usage) {
133                                 case HID_DG_TOOLSERIALNUMBER:
134                                         wacom_wac->serial[0] = value;
135                                         break;
136
137                                 case WACOM_HID_WD_SERIALHI:
138                                         wacom_wac->serial[0] |= ((__u64)value) << 32;
139                                         break;
140
141                                 case WACOM_HID_WD_TOOLTYPE:
142                                         wacom_wac->id[0] = value;
143                                         break;
144                                 }
145                         }
146                         else {
147                                 insert = true;
148                         }
149                 }
150         }
151
152         if (flush)
153                 wacom_wac_queue_flush(hdev, &wacom_wac->pen_fifo);
154         else if (insert)
155                 wacom_wac_queue_insert(hdev, &wacom_wac->pen_fifo, raw_data, size);
156
157         return insert && !flush;
158 }
159
160 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
161                 u8 *raw_data, int size)
162 {
163         struct wacom *wacom = hid_get_drvdata(hdev);
164
165         if (size > WACOM_PKGLEN_MAX)
166                 return 1;
167
168         if (wacom_wac_pen_serial_enforce(hdev, report, raw_data, size))
169                 return -1;
170
171         memcpy(wacom->wacom_wac.data, raw_data, size);
172
173         wacom_wac_irq(&wacom->wacom_wac, size);
174
175         return 0;
176 }
177
178 static int wacom_open(struct input_dev *dev)
179 {
180         struct wacom *wacom = input_get_drvdata(dev);
181
182         return hid_hw_open(wacom->hdev);
183 }
184
185 static void wacom_close(struct input_dev *dev)
186 {
187         struct wacom *wacom = input_get_drvdata(dev);
188
189         /*
190          * wacom->hdev should never be null, but surprisingly, I had the case
191          * once while unplugging the Wacom Wireless Receiver.
192          */
193         if (wacom->hdev)
194                 hid_hw_close(wacom->hdev);
195 }
196
197 /*
198  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
199  */
200 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
201                                unsigned unit, int exponent)
202 {
203         struct hid_field field = {
204                 .logical_maximum = logical_extents,
205                 .physical_maximum = physical_extents,
206                 .unit = unit,
207                 .unit_exponent = exponent,
208         };
209
210         return hidinput_calc_abs_res(&field, ABS_X);
211 }
212
213 static void wacom_feature_mapping(struct hid_device *hdev,
214                 struct hid_field *field, struct hid_usage *usage)
215 {
216         struct wacom *wacom = hid_get_drvdata(hdev);
217         struct wacom_features *features = &wacom->wacom_wac.features;
218         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
219         unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
220         u8 *data;
221         int ret;
222         int n;
223
224         switch (equivalent_usage) {
225         case HID_DG_CONTACTMAX:
226                 /* leave touch_max as is if predefined */
227                 if (!features->touch_max) {
228                         /* read manually */
229                         data = kzalloc(2, GFP_KERNEL);
230                         if (!data)
231                                 break;
232                         data[0] = field->report->id;
233                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
234                                                 data, 2, WAC_CMD_RETRIES);
235                         if (ret == 2) {
236                                 features->touch_max = data[1];
237                         } else {
238                                 features->touch_max = 16;
239                                 hid_warn(hdev, "wacom_feature_mapping: "
240                                          "could not get HID_DG_CONTACTMAX, "
241                                          "defaulting to %d\n",
242                                           features->touch_max);
243                         }
244                         kfree(data);
245                 }
246                 break;
247         case HID_DG_INPUTMODE:
248                 /* Ignore if value index is out of bounds. */
249                 if (usage->usage_index >= field->report_count) {
250                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
251                         break;
252                 }
253
254                 hid_data->inputmode = field->report->id;
255                 hid_data->inputmode_index = usage->usage_index;
256                 break;
257
258         case HID_UP_DIGITIZER:
259                 if (field->report->id == 0x0B &&
260                     (field->application == WACOM_HID_G9_PEN ||
261                      field->application == WACOM_HID_G11_PEN)) {
262                         wacom->wacom_wac.mode_report = field->report->id;
263                         wacom->wacom_wac.mode_value = 0;
264                 }
265                 break;
266
267         case WACOM_HID_WD_DATAMODE:
268                 wacom->wacom_wac.mode_report = field->report->id;
269                 wacom->wacom_wac.mode_value = 2;
270                 break;
271
272         case WACOM_HID_UP_G9:
273         case WACOM_HID_UP_G11:
274                 if (field->report->id == 0x03 &&
275                     (field->application == WACOM_HID_G9_TOUCHSCREEN ||
276                      field->application == WACOM_HID_G11_TOUCHSCREEN)) {
277                         wacom->wacom_wac.mode_report = field->report->id;
278                         wacom->wacom_wac.mode_value = 0;
279                 }
280                 break;
281         case WACOM_HID_WD_OFFSETLEFT:
282         case WACOM_HID_WD_OFFSETTOP:
283         case WACOM_HID_WD_OFFSETRIGHT:
284         case WACOM_HID_WD_OFFSETBOTTOM:
285                 /* read manually */
286                 n = hid_report_len(field->report);
287                 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
288                 if (!data)
289                         break;
290                 data[0] = field->report->id;
291                 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
292                                         data, n, WAC_CMD_RETRIES);
293                 if (ret == n) {
294                         ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
295                                                    data, n, 0);
296                 } else {
297                         hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
298                                  __func__);
299                 }
300                 kfree(data);
301                 break;
302         }
303
304         if (hdev->vendor == USB_VENDOR_ID_WACOM &&
305             hdev->product == 0x4200 /* Dell Canvas 27 */ &&
306             field->application == HID_UP_MSVENDOR) {
307                 wacom->wacom_wac.mode_report = field->report->id;
308                 wacom->wacom_wac.mode_value = 2;
309         }
310 }
311
312 /*
313  * Interface Descriptor of wacom devices can be incomplete and
314  * inconsistent so wacom_features table is used to store stylus
315  * device's packet lengths, various maximum values, and tablet
316  * resolution based on product ID's.
317  *
318  * For devices that contain 2 interfaces, wacom_features table is
319  * inaccurate for the touch interface.  Since the Interface Descriptor
320  * for touch interfaces has pretty complete data, this function exists
321  * to query tablet for this missing information instead of hard coding in
322  * an additional table.
323  *
324  * A typical Interface Descriptor for a stylus will contain a
325  * boot mouse application collection that is not of interest and this
326  * function will ignore it.
327  *
328  * It also contains a digitizer application collection that also is not
329  * of interest since any information it contains would be duplicate
330  * of what is in wacom_features. Usually it defines a report of an array
331  * of bytes that could be used as max length of the stylus packet returned.
332  * If it happens to define a Digitizer-Stylus Physical Collection then
333  * the X and Y logical values contain valid data but it is ignored.
334  *
335  * A typical Interface Descriptor for a touch interface will contain a
336  * Digitizer-Finger Physical Collection which will define both logical
337  * X/Y maximum as well as the physical size of tablet. Since touch
338  * interfaces haven't supported pressure or distance, this is enough
339  * information to override invalid values in the wacom_features table.
340  *
341  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
342  * data. We deal with them after returning from this function.
343  */
344 static void wacom_usage_mapping(struct hid_device *hdev,
345                 struct hid_field *field, struct hid_usage *usage)
346 {
347         struct wacom *wacom = hid_get_drvdata(hdev);
348         struct wacom_features *features = &wacom->wacom_wac.features;
349         bool finger = WACOM_FINGER_FIELD(field);
350         bool pen = WACOM_PEN_FIELD(field);
351
352         /*
353         * Requiring Stylus Usage will ignore boot mouse
354         * X/Y values and some cases of invalid Digitizer X/Y
355         * values commonly reported.
356         */
357         if (pen)
358                 features->device_type |= WACOM_DEVICETYPE_PEN;
359         else if (finger)
360                 features->device_type |= WACOM_DEVICETYPE_TOUCH;
361         else
362                 return;
363
364         /*
365          * Bamboo models do not support HID_DG_CONTACTMAX.
366          * And, Bamboo Pen only descriptor contains touch.
367          */
368         if (features->type > BAMBOO_PT) {
369                 /* ISDv4 touch devices at least supports one touch point */
370                 if (finger && !features->touch_max)
371                         features->touch_max = 1;
372         }
373
374         /*
375          * ISDv4 devices which predate HID's adoption of the
376          * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
377          * position instead. We can accurately detect if a
378          * usage with that value should be HID_DG_BARRELSWITCH2
379          * based on the surrounding usages, which have remained
380          * constant across generations.
381          */
382         if (features->type == HID_GENERIC &&
383             usage->hid == 0x000D0000 &&
384             field->application == HID_DG_PEN &&
385             field->physical == HID_DG_STYLUS) {
386                 int i = usage->usage_index;
387
388                 if (i-4 >= 0 && i+1 < field->maxusage &&
389                     field->usage[i-4].hid == HID_DG_TIPSWITCH &&
390                     field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
391                     field->usage[i-2].hid == HID_DG_ERASER &&
392                     field->usage[i-1].hid == HID_DG_INVERT &&
393                     field->usage[i+1].hid == HID_DG_INRANGE) {
394                         usage->hid = HID_DG_BARRELSWITCH2;
395                 }
396         }
397
398         switch (usage->hid) {
399         case HID_GD_X:
400                 features->x_max = field->logical_maximum;
401                 if (finger) {
402                         features->x_phy = field->physical_maximum;
403                         if ((features->type != BAMBOO_PT) &&
404                             (features->type != BAMBOO_TOUCH)) {
405                                 features->unit = field->unit;
406                                 features->unitExpo = field->unit_exponent;
407                         }
408                 }
409                 break;
410         case HID_GD_Y:
411                 features->y_max = field->logical_maximum;
412                 if (finger) {
413                         features->y_phy = field->physical_maximum;
414                         if ((features->type != BAMBOO_PT) &&
415                             (features->type != BAMBOO_TOUCH)) {
416                                 features->unit = field->unit;
417                                 features->unitExpo = field->unit_exponent;
418                         }
419                 }
420                 break;
421         case HID_DG_TIPPRESSURE:
422                 if (pen)
423                         features->pressure_max = field->logical_maximum;
424                 break;
425         }
426
427         if (features->type == HID_GENERIC)
428                 wacom_wac_usage_mapping(hdev, field, usage);
429 }
430
431 static void wacom_post_parse_hid(struct hid_device *hdev,
432                                  struct wacom_features *features)
433 {
434         struct wacom *wacom = hid_get_drvdata(hdev);
435         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
436
437         if (features->type == HID_GENERIC) {
438                 /* Any last-minute generic device setup */
439                 if (wacom_wac->has_mode_change) {
440                         if (wacom_wac->is_direct_mode)
441                                 features->device_type |= WACOM_DEVICETYPE_DIRECT;
442                         else
443                                 features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
444                 }
445
446                 if (features->touch_max > 1) {
447                         if (features->device_type & WACOM_DEVICETYPE_DIRECT)
448                                 input_mt_init_slots(wacom_wac->touch_input,
449                                                     wacom_wac->features.touch_max,
450                                                     INPUT_MT_DIRECT);
451                         else
452                                 input_mt_init_slots(wacom_wac->touch_input,
453                                                     wacom_wac->features.touch_max,
454                                                     INPUT_MT_POINTER);
455                 }
456         }
457 }
458
459 static void wacom_parse_hid(struct hid_device *hdev,
460                            struct wacom_features *features)
461 {
462         struct hid_report_enum *rep_enum;
463         struct hid_report *hreport;
464         int i, j;
465
466         /* check features first */
467         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
468         list_for_each_entry(hreport, &rep_enum->report_list, list) {
469                 for (i = 0; i < hreport->maxfield; i++) {
470                         /* Ignore if report count is out of bounds. */
471                         if (hreport->field[i]->report_count < 1)
472                                 continue;
473
474                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
475                                 wacom_feature_mapping(hdev, hreport->field[i],
476                                                 hreport->field[i]->usage + j);
477                         }
478                 }
479         }
480
481         /* now check the input usages */
482         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
483         list_for_each_entry(hreport, &rep_enum->report_list, list) {
484
485                 if (!hreport->maxfield)
486                         continue;
487
488                 for (i = 0; i < hreport->maxfield; i++)
489                         for (j = 0; j < hreport->field[i]->maxusage; j++)
490                                 wacom_usage_mapping(hdev, hreport->field[i],
491                                                 hreport->field[i]->usage + j);
492         }
493
494         wacom_post_parse_hid(hdev, features);
495 }
496
497 static int wacom_hid_set_device_mode(struct hid_device *hdev)
498 {
499         struct wacom *wacom = hid_get_drvdata(hdev);
500         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
501         struct hid_report *r;
502         struct hid_report_enum *re;
503
504         if (hid_data->inputmode < 0)
505                 return 0;
506
507         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
508         r = re->report_id_hash[hid_data->inputmode];
509         if (r) {
510                 r->field[0]->value[hid_data->inputmode_index] = 2;
511                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
512         }
513         return 0;
514 }
515
516 static int wacom_set_device_mode(struct hid_device *hdev,
517                                  struct wacom_wac *wacom_wac)
518 {
519         u8 *rep_data;
520         struct hid_report *r;
521         struct hid_report_enum *re;
522         int length;
523         int error = -ENOMEM, limit = 0;
524
525         if (wacom_wac->mode_report < 0)
526                 return 0;
527
528         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
529         r = re->report_id_hash[wacom_wac->mode_report];
530         if (!r)
531                 return -EINVAL;
532
533         rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
534         if (!rep_data)
535                 return -ENOMEM;
536
537         length = hid_report_len(r);
538
539         do {
540                 rep_data[0] = wacom_wac->mode_report;
541                 rep_data[1] = wacom_wac->mode_value;
542
543                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
544                                          length, 1);
545                 if (error >= 0)
546                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
547                                                  rep_data, length, 1);
548         } while (error >= 0 &&
549                  rep_data[1] != wacom_wac->mode_report &&
550                  limit++ < WAC_MSG_RETRIES);
551
552         kfree(rep_data);
553
554         return error < 0 ? error : 0;
555 }
556
557 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
558                 struct wacom_features *features)
559 {
560         struct wacom *wacom = hid_get_drvdata(hdev);
561         int ret;
562         u8 rep_data[2];
563
564         switch (features->type) {
565         case GRAPHIRE_BT:
566                 rep_data[0] = 0x03;
567                 rep_data[1] = 0x00;
568                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
569                                         3);
570
571                 if (ret >= 0) {
572                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
573                         rep_data[1] = 0x00;
574
575                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
576                                                 rep_data, 2, 3);
577
578                         if (ret >= 0) {
579                                 wacom->wacom_wac.bt_high_speed = speed;
580                                 return 0;
581                         }
582                 }
583
584                 /*
585                  * Note that if the raw queries fail, it's not a hard failure
586                  * and it is safe to continue
587                  */
588                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
589                          rep_data[0], ret);
590                 break;
591         case INTUOS4WL:
592                 if (speed == 1)
593                         wacom->wacom_wac.bt_features &= ~0x20;
594                 else
595                         wacom->wacom_wac.bt_features |= 0x20;
596
597                 rep_data[0] = 0x03;
598                 rep_data[1] = wacom->wacom_wac.bt_features;
599
600                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
601                                         1);
602                 if (ret >= 0)
603                         wacom->wacom_wac.bt_high_speed = speed;
604                 break;
605         }
606
607         return 0;
608 }
609
610 /*
611  * Switch the tablet into its most-capable mode. Wacom tablets are
612  * typically configured to power-up in a mode which sends mouse-like
613  * reports to the OS. To get absolute position, pressure data, etc.
614  * from the tablet, it is necessary to switch the tablet out of this
615  * mode and into one which sends the full range of tablet data.
616  */
617 static int _wacom_query_tablet_data(struct wacom *wacom)
618 {
619         struct hid_device *hdev = wacom->hdev;
620         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
621         struct wacom_features *features = &wacom_wac->features;
622
623         if (hdev->bus == BUS_BLUETOOTH)
624                 return wacom_bt_query_tablet_data(hdev, 1, features);
625
626         if (features->type != HID_GENERIC) {
627                 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
628                         if (features->type > TABLETPC) {
629                                 /* MT Tablet PC touch */
630                                 wacom_wac->mode_report = 3;
631                                 wacom_wac->mode_value = 4;
632                         } else if (features->type == WACOM_24HDT) {
633                                 wacom_wac->mode_report = 18;
634                                 wacom_wac->mode_value = 2;
635                         } else if (features->type == WACOM_27QHDT) {
636                                 wacom_wac->mode_report = 131;
637                                 wacom_wac->mode_value = 2;
638                         } else if (features->type == BAMBOO_PAD) {
639                                 wacom_wac->mode_report = 2;
640                                 wacom_wac->mode_value = 2;
641                         }
642                 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
643                         if (features->type <= BAMBOO_PT) {
644                                 wacom_wac->mode_report = 2;
645                                 wacom_wac->mode_value = 2;
646                         }
647                 }
648         }
649
650         wacom_set_device_mode(hdev, wacom_wac);
651
652         if (features->type == HID_GENERIC)
653                 return wacom_hid_set_device_mode(hdev);
654
655         return 0;
656 }
657
658 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
659                                          struct wacom_features *features)
660 {
661         struct wacom *wacom = hid_get_drvdata(hdev);
662         struct usb_interface *intf = wacom->intf;
663
664         /* default features */
665         features->x_fuzz = 4;
666         features->y_fuzz = 4;
667         features->pressure_fuzz = 0;
668         features->distance_fuzz = 1;
669         features->tilt_fuzz = 1;
670
671         /*
672          * The wireless device HID is basic and layout conflicts with
673          * other tablets (monitor and touch interface can look like pen).
674          * Skip the query for this type and modify defaults based on
675          * interface number.
676          */
677         if (features->type == WIRELESS) {
678                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
679                         features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
680                 else
681                         features->device_type = WACOM_DEVICETYPE_NONE;
682                 return;
683         }
684
685         wacom_parse_hid(hdev, features);
686 }
687
688 struct wacom_hdev_data {
689         struct list_head list;
690         struct kref kref;
691         struct hid_device *dev;
692         struct wacom_shared shared;
693 };
694
695 static LIST_HEAD(wacom_udev_list);
696 static DEFINE_MUTEX(wacom_udev_list_lock);
697
698 static bool compare_device_paths(struct hid_device *hdev_a,
699                 struct hid_device *hdev_b, char separator)
700 {
701         int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
702         int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
703
704         if (n1 != n2 || n1 <= 0 || n2 <= 0)
705                 return false;
706
707         return !strncmp(hdev_a->phys, hdev_b->phys, n1);
708 }
709
710 static bool wacom_are_sibling(struct hid_device *hdev,
711                 struct hid_device *sibling)
712 {
713         struct wacom *wacom = hid_get_drvdata(hdev);
714         struct wacom_features *features = &wacom->wacom_wac.features;
715         struct wacom *sibling_wacom = hid_get_drvdata(sibling);
716         struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
717         __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
718         __u32 oPid = features->oPid ? features->oPid : hdev->product;
719
720         /* The defined oVid/oPid must match that of the sibling */
721         if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
722                 return false;
723         if (features->oPid != HID_ANY_ID && sibling->product != oPid)
724                 return false;
725
726         /*
727          * Devices with the same VID/PID must share the same physical
728          * device path, while those with different VID/PID must share
729          * the same physical parent device path.
730          */
731         if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
732                 if (!compare_device_paths(hdev, sibling, '/'))
733                         return false;
734         } else {
735                 if (!compare_device_paths(hdev, sibling, '.'))
736                         return false;
737         }
738
739         /* Skip the remaining heuristics unless you are a HID_GENERIC device */
740         if (features->type != HID_GENERIC)
741                 return true;
742
743         /*
744          * Direct-input devices may not be siblings of indirect-input
745          * devices.
746          */
747         if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
748             !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
749                 return false;
750
751         /*
752          * Indirect-input devices may not be siblings of direct-input
753          * devices.
754          */
755         if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
756             (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
757                 return false;
758
759         /* Pen devices may only be siblings of touch devices */
760         if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
761             !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
762                 return false;
763
764         /* Touch devices may only be siblings of pen devices */
765         if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
766             !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
767                 return false;
768
769         /*
770          * No reason could be found for these two devices to NOT be
771          * siblings, so there's a good chance they ARE siblings
772          */
773         return true;
774 }
775
776 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
777 {
778         struct wacom_hdev_data *data;
779
780         /* Try to find an already-probed interface from the same device */
781         list_for_each_entry(data, &wacom_udev_list, list) {
782                 if (compare_device_paths(hdev, data->dev, '/')) {
783                         kref_get(&data->kref);
784                         return data;
785                 }
786         }
787
788         /* Fallback to finding devices that appear to be "siblings" */
789         list_for_each_entry(data, &wacom_udev_list, list) {
790                 if (wacom_are_sibling(hdev, data->dev)) {
791                         kref_get(&data->kref);
792                         return data;
793                 }
794         }
795
796         return NULL;
797 }
798
799 static void wacom_release_shared_data(struct kref *kref)
800 {
801         struct wacom_hdev_data *data =
802                 container_of(kref, struct wacom_hdev_data, kref);
803
804         mutex_lock(&wacom_udev_list_lock);
805         list_del(&data->list);
806         mutex_unlock(&wacom_udev_list_lock);
807
808         kfree(data);
809 }
810
811 static void wacom_remove_shared_data(void *res)
812 {
813         struct wacom *wacom = res;
814         struct wacom_hdev_data *data;
815         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
816
817         if (wacom_wac->shared) {
818                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
819                                     shared);
820
821                 if (wacom_wac->shared->touch == wacom->hdev)
822                         wacom_wac->shared->touch = NULL;
823                 else if (wacom_wac->shared->pen == wacom->hdev)
824                         wacom_wac->shared->pen = NULL;
825
826                 kref_put(&data->kref, wacom_release_shared_data);
827                 wacom_wac->shared = NULL;
828         }
829 }
830
831 static int wacom_add_shared_data(struct hid_device *hdev)
832 {
833         struct wacom *wacom = hid_get_drvdata(hdev);
834         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
835         struct wacom_hdev_data *data;
836         int retval = 0;
837
838         mutex_lock(&wacom_udev_list_lock);
839
840         data = wacom_get_hdev_data(hdev);
841         if (!data) {
842                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
843                 if (!data) {
844                         retval = -ENOMEM;
845                         goto out;
846                 }
847
848                 kref_init(&data->kref);
849                 data->dev = hdev;
850                 list_add_tail(&data->list, &wacom_udev_list);
851         }
852
853         wacom_wac->shared = &data->shared;
854
855         retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
856         if (retval) {
857                 mutex_unlock(&wacom_udev_list_lock);
858                 wacom_remove_shared_data(wacom);
859                 return retval;
860         }
861
862         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
863                 wacom_wac->shared->touch = hdev;
864         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
865                 wacom_wac->shared->pen = hdev;
866
867 out:
868         mutex_unlock(&wacom_udev_list_lock);
869         return retval;
870 }
871
872 static int wacom_led_control(struct wacom *wacom)
873 {
874         unsigned char *buf;
875         int retval;
876         unsigned char report_id = WAC_CMD_LED_CONTROL;
877         int buf_size = 9;
878
879         if (!wacom->led.groups)
880                 return -ENOTSUPP;
881
882         if (wacom->wacom_wac.features.type == REMOTE)
883                 return -ENOTSUPP;
884
885         if (wacom->wacom_wac.pid) { /* wireless connected */
886                 report_id = WAC_CMD_WL_LED_CONTROL;
887                 buf_size = 13;
888         }
889         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
890                 report_id = WAC_CMD_WL_INTUOSP2;
891                 buf_size = 51;
892         }
893         buf = kzalloc(buf_size, GFP_KERNEL);
894         if (!buf)
895                 return -ENOMEM;
896
897         if (wacom->wacom_wac.features.type == HID_GENERIC) {
898                 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
899                 buf[1] = wacom->led.llv;
900                 buf[2] = wacom->led.groups[0].select & 0x03;
901
902         } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
903             wacom->wacom_wac.features.type <= INTUOSPL)) {
904                 /*
905                  * Touch Ring and crop mark LED luminance may take on
906                  * one of four values:
907                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
908                  */
909                 int ring_led = wacom->led.groups[0].select & 0x03;
910                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
911                 int crop_lum = 0;
912                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
913
914                 buf[0] = report_id;
915                 if (wacom->wacom_wac.pid) {
916                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
917                                          buf, buf_size, WAC_CMD_RETRIES);
918                         buf[0] = report_id;
919                         buf[4] = led_bits;
920                 } else
921                         buf[1] = led_bits;
922         }
923         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
924                 buf[0] = report_id;
925                 buf[4] = 100; // Power Connection LED (ORANGE)
926                 buf[5] = 100; // BT Connection LED (BLUE)
927                 buf[6] = 100; // Paper Mode (RED?)
928                 buf[7] = 100; // Paper Mode (GREEN?)
929                 buf[8] = 100; // Paper Mode (BLUE?)
930                 buf[9] = wacom->led.llv;
931                 buf[10] = wacom->led.groups[0].select & 0x03;
932         }
933         else {
934                 int led = wacom->led.groups[0].select | 0x4;
935
936                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
937                     wacom->wacom_wac.features.type == WACOM_24HD)
938                         led |= (wacom->led.groups[1].select << 4) | 0x40;
939
940                 buf[0] = report_id;
941                 buf[1] = led;
942                 buf[2] = wacom->led.llv;
943                 buf[3] = wacom->led.hlv;
944                 buf[4] = wacom->led.img_lum;
945         }
946
947         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
948                                   WAC_CMD_RETRIES);
949         kfree(buf);
950
951         return retval;
952 }
953
954 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
955                 const unsigned len, const void *img)
956 {
957         unsigned char *buf;
958         int i, retval;
959         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
960
961         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
962         if (!buf)
963                 return -ENOMEM;
964
965         /* Send 'start' command */
966         buf[0] = WAC_CMD_ICON_START;
967         buf[1] = 1;
968         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
969                                   WAC_CMD_RETRIES);
970         if (retval < 0)
971                 goto out;
972
973         buf[0] = xfer_id;
974         buf[1] = button_id & 0x07;
975         for (i = 0; i < 4; i++) {
976                 buf[2] = i;
977                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
978
979                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
980                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
981                 if (retval < 0)
982                         break;
983         }
984
985         /* Send 'stop' */
986         buf[0] = WAC_CMD_ICON_START;
987         buf[1] = 0;
988         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
989                          WAC_CMD_RETRIES);
990
991 out:
992         kfree(buf);
993         return retval;
994 }
995
996 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
997                                       const char *buf, size_t count)
998 {
999         struct hid_device *hdev = to_hid_device(dev);
1000         struct wacom *wacom = hid_get_drvdata(hdev);
1001         unsigned int id;
1002         int err;
1003
1004         err = kstrtouint(buf, 10, &id);
1005         if (err)
1006                 return err;
1007
1008         mutex_lock(&wacom->lock);
1009
1010         wacom->led.groups[set_id].select = id & 0x3;
1011         err = wacom_led_control(wacom);
1012
1013         mutex_unlock(&wacom->lock);
1014
1015         return err < 0 ? err : count;
1016 }
1017
1018 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
1019 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
1020         struct device_attribute *attr, const char *buf, size_t count)   \
1021 {                                                                       \
1022         return wacom_led_select_store(dev, SET_ID, buf, count);         \
1023 }                                                                       \
1024 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
1025         struct device_attribute *attr, char *buf)                       \
1026 {                                                                       \
1027         struct hid_device *hdev = to_hid_device(dev);\
1028         struct wacom *wacom = hid_get_drvdata(hdev);                    \
1029         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
1030                          wacom->led.groups[SET_ID].select);             \
1031 }                                                                       \
1032 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
1033                     wacom_led##SET_ID##_select_show,                    \
1034                     wacom_led##SET_ID##_select_store)
1035
1036 DEVICE_LED_SELECT_ATTR(0);
1037 DEVICE_LED_SELECT_ATTR(1);
1038
1039 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
1040                                      const char *buf, size_t count)
1041 {
1042         unsigned int value;
1043         int err;
1044
1045         err = kstrtouint(buf, 10, &value);
1046         if (err)
1047                 return err;
1048
1049         mutex_lock(&wacom->lock);
1050
1051         *dest = value & 0x7f;
1052         err = wacom_led_control(wacom);
1053
1054         mutex_unlock(&wacom->lock);
1055
1056         return err < 0 ? err : count;
1057 }
1058
1059 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
1060 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
1061         struct device_attribute *attr, const char *buf, size_t count)   \
1062 {                                                                       \
1063         struct hid_device *hdev = to_hid_device(dev);\
1064         struct wacom *wacom = hid_get_drvdata(hdev);                    \
1065                                                                         \
1066         return wacom_luminance_store(wacom, &wacom->led.field,          \
1067                                      buf, count);                       \
1068 }                                                                       \
1069 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
1070         struct device_attribute *attr, char *buf)                       \
1071 {                                                                       \
1072         struct wacom *wacom = dev_get_drvdata(dev);                     \
1073         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
1074 }                                                                       \
1075 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
1076                    wacom_##name##_luminance_show,                       \
1077                    wacom_##name##_luminance_store)
1078
1079 DEVICE_LUMINANCE_ATTR(status0, llv);
1080 DEVICE_LUMINANCE_ATTR(status1, hlv);
1081 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
1082
1083 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
1084                                         const char *buf, size_t count)
1085 {
1086         struct hid_device *hdev = to_hid_device(dev);
1087         struct wacom *wacom = hid_get_drvdata(hdev);
1088         int err;
1089         unsigned len;
1090         u8 xfer_id;
1091
1092         if (hdev->bus == BUS_BLUETOOTH) {
1093                 len = 256;
1094                 xfer_id = WAC_CMD_ICON_BT_XFER;
1095         } else {
1096                 len = 1024;
1097                 xfer_id = WAC_CMD_ICON_XFER;
1098         }
1099
1100         if (count != len)
1101                 return -EINVAL;
1102
1103         mutex_lock(&wacom->lock);
1104
1105         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
1106
1107         mutex_unlock(&wacom->lock);
1108
1109         return err < 0 ? err : count;
1110 }
1111
1112 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
1113 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
1114         struct device_attribute *attr, const char *buf, size_t count)   \
1115 {                                                                       \
1116         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
1117 }                                                                       \
1118 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
1119                    NULL, wacom_btnimg##BUTTON_ID##_store)
1120
1121 DEVICE_BTNIMG_ATTR(0);
1122 DEVICE_BTNIMG_ATTR(1);
1123 DEVICE_BTNIMG_ATTR(2);
1124 DEVICE_BTNIMG_ATTR(3);
1125 DEVICE_BTNIMG_ATTR(4);
1126 DEVICE_BTNIMG_ATTR(5);
1127 DEVICE_BTNIMG_ATTR(6);
1128 DEVICE_BTNIMG_ATTR(7);
1129
1130 static struct attribute *cintiq_led_attrs[] = {
1131         &dev_attr_status_led0_select.attr,
1132         &dev_attr_status_led1_select.attr,
1133         NULL
1134 };
1135
1136 static struct attribute_group cintiq_led_attr_group = {
1137         .name = "wacom_led",
1138         .attrs = cintiq_led_attrs,
1139 };
1140
1141 static struct attribute *intuos4_led_attrs[] = {
1142         &dev_attr_status0_luminance.attr,
1143         &dev_attr_status1_luminance.attr,
1144         &dev_attr_status_led0_select.attr,
1145         &dev_attr_buttons_luminance.attr,
1146         &dev_attr_button0_rawimg.attr,
1147         &dev_attr_button1_rawimg.attr,
1148         &dev_attr_button2_rawimg.attr,
1149         &dev_attr_button3_rawimg.attr,
1150         &dev_attr_button4_rawimg.attr,
1151         &dev_attr_button5_rawimg.attr,
1152         &dev_attr_button6_rawimg.attr,
1153         &dev_attr_button7_rawimg.attr,
1154         NULL
1155 };
1156
1157 static struct attribute_group intuos4_led_attr_group = {
1158         .name = "wacom_led",
1159         .attrs = intuos4_led_attrs,
1160 };
1161
1162 static struct attribute *intuos5_led_attrs[] = {
1163         &dev_attr_status0_luminance.attr,
1164         &dev_attr_status_led0_select.attr,
1165         NULL
1166 };
1167
1168 static struct attribute_group intuos5_led_attr_group = {
1169         .name = "wacom_led",
1170         .attrs = intuos5_led_attrs,
1171 };
1172
1173 static struct attribute *generic_led_attrs[] = {
1174         &dev_attr_status0_luminance.attr,
1175         &dev_attr_status_led0_select.attr,
1176         NULL
1177 };
1178
1179 static struct attribute_group generic_led_attr_group = {
1180         .name = "wacom_led",
1181         .attrs = generic_led_attrs,
1182 };
1183
1184 struct wacom_sysfs_group_devres {
1185         struct attribute_group *group;
1186         struct kobject *root;
1187 };
1188
1189 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1190 {
1191         struct wacom_sysfs_group_devres *devres = res;
1192         struct kobject *kobj = devres->root;
1193
1194         dev_dbg(dev, "%s: dropping reference to %s\n",
1195                 __func__, devres->group->name);
1196         sysfs_remove_group(kobj, devres->group);
1197 }
1198
1199 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1200                                            struct kobject *root,
1201                                            struct attribute_group *group)
1202 {
1203         struct wacom_sysfs_group_devres *devres;
1204         int error;
1205
1206         devres = devres_alloc(wacom_devm_sysfs_group_release,
1207                               sizeof(struct wacom_sysfs_group_devres),
1208                               GFP_KERNEL);
1209         if (!devres)
1210                 return -ENOMEM;
1211
1212         devres->group = group;
1213         devres->root = root;
1214
1215         error = sysfs_create_group(devres->root, group);
1216         if (error)
1217                 return error;
1218
1219         devres_add(&wacom->hdev->dev, devres);
1220
1221         return 0;
1222 }
1223
1224 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1225                                          struct attribute_group *group)
1226 {
1227         return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1228                                                group);
1229 }
1230
1231 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1232 {
1233         struct wacom *wacom = led->wacom;
1234
1235         if (wacom->led.max_hlv)
1236                 return led->hlv * LED_FULL / wacom->led.max_hlv;
1237
1238         if (wacom->led.max_llv)
1239                 return led->llv * LED_FULL / wacom->led.max_llv;
1240
1241         /* device doesn't support brightness tuning */
1242         return LED_FULL;
1243 }
1244
1245 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1246 {
1247         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1248         struct wacom *wacom = led->wacom;
1249
1250         if (wacom->led.groups[led->group].select != led->id)
1251                 return LED_OFF;
1252
1253         return wacom_leds_brightness_get(led);
1254 }
1255
1256 static int wacom_led_brightness_set(struct led_classdev *cdev,
1257                                     enum led_brightness brightness)
1258 {
1259         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1260         struct wacom *wacom = led->wacom;
1261         int error;
1262
1263         mutex_lock(&wacom->lock);
1264
1265         if (!wacom->led.groups || (brightness == LED_OFF &&
1266             wacom->led.groups[led->group].select != led->id)) {
1267                 error = 0;
1268                 goto out;
1269         }
1270
1271         led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1272         led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1273
1274         wacom->led.groups[led->group].select = led->id;
1275
1276         error = wacom_led_control(wacom);
1277
1278 out:
1279         mutex_unlock(&wacom->lock);
1280
1281         return error;
1282 }
1283
1284 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1285                                                enum led_brightness brightness)
1286 {
1287 }
1288
1289 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1290                                   struct wacom_led *led, unsigned int group,
1291                                   unsigned int id, bool read_only)
1292 {
1293         int error;
1294         char *name;
1295
1296         name = devm_kasprintf(dev, GFP_KERNEL,
1297                               "%s::wacom-%d.%d",
1298                               dev_name(dev),
1299                               group,
1300                               id);
1301         if (!name)
1302                 return -ENOMEM;
1303
1304         if (!read_only) {
1305                 led->trigger.name = name;
1306                 error = devm_led_trigger_register(dev, &led->trigger);
1307                 if (error) {
1308                         hid_err(wacom->hdev,
1309                                 "failed to register LED trigger %s: %d\n",
1310                                 led->cdev.name, error);
1311                         return error;
1312                 }
1313         }
1314
1315         led->group = group;
1316         led->id = id;
1317         led->wacom = wacom;
1318         led->llv = wacom->led.llv;
1319         led->hlv = wacom->led.hlv;
1320         led->cdev.name = name;
1321         led->cdev.max_brightness = LED_FULL;
1322         led->cdev.flags = LED_HW_PLUGGABLE;
1323         led->cdev.brightness_get = __wacom_led_brightness_get;
1324         if (!read_only) {
1325                 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1326                 led->cdev.default_trigger = led->cdev.name;
1327         } else {
1328                 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1329         }
1330
1331         error = devm_led_classdev_register(dev, &led->cdev);
1332         if (error) {
1333                 hid_err(wacom->hdev,
1334                         "failed to register LED %s: %d\n",
1335                         led->cdev.name, error);
1336                 led->cdev.name = NULL;
1337                 return error;
1338         }
1339
1340         return 0;
1341 }
1342
1343 static void wacom_led_groups_release_one(void *data)
1344 {
1345         struct wacom_group_leds *group = data;
1346
1347         devres_release_group(group->dev, group);
1348 }
1349
1350 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1351                                                    struct wacom *wacom,
1352                                                    int group_id, int count,
1353                                                    bool read_only)
1354 {
1355         struct wacom_led *leds;
1356         int i, error;
1357
1358         if (group_id >= wacom->led.count || count <= 0)
1359                 return -EINVAL;
1360
1361         if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1362                 return -ENOMEM;
1363
1364         leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL);
1365         if (!leds) {
1366                 error = -ENOMEM;
1367                 goto err;
1368         }
1369
1370         wacom->led.groups[group_id].leds = leds;
1371         wacom->led.groups[group_id].count = count;
1372
1373         for (i = 0; i < count; i++) {
1374                 error = wacom_led_register_one(dev, wacom, &leds[i],
1375                                                group_id, i, read_only);
1376                 if (error)
1377                         goto err;
1378         }
1379
1380         wacom->led.groups[group_id].dev = dev;
1381
1382         devres_close_group(dev, &wacom->led.groups[group_id]);
1383
1384         /*
1385          * There is a bug (?) in devm_led_classdev_register() in which its
1386          * increments the refcount of the parent. If the parent is an input
1387          * device, that means the ref count never reaches 0 when
1388          * devm_input_device_release() gets called.
1389          * This means that the LEDs are still there after disconnect.
1390          * Manually force the release of the group so that the leds are released
1391          * once we are done using them.
1392          */
1393         error = devm_add_action_or_reset(&wacom->hdev->dev,
1394                                          wacom_led_groups_release_one,
1395                                          &wacom->led.groups[group_id]);
1396         if (error)
1397                 return error;
1398
1399         return 0;
1400
1401 err:
1402         devres_release_group(dev, &wacom->led.groups[group_id]);
1403         return error;
1404 }
1405
1406 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1407                                  unsigned int id)
1408 {
1409         struct wacom_group_leds *group;
1410
1411         if (group_id >= wacom->led.count)
1412                 return NULL;
1413
1414         group = &wacom->led.groups[group_id];
1415
1416         if (!group->leds)
1417                 return NULL;
1418
1419         id %= group->count;
1420
1421         return &group->leds[id];
1422 }
1423
1424 /**
1425  * wacom_led_next: gives the next available led with a wacom trigger.
1426  *
1427  * returns the next available struct wacom_led which has its default trigger
1428  * or the current one if none is available.
1429  */
1430 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1431 {
1432         struct wacom_led *next_led;
1433         int group, next;
1434
1435         if (!wacom || !cur)
1436                 return NULL;
1437
1438         group = cur->group;
1439         next = cur->id;
1440
1441         do {
1442                 next_led = wacom_led_find(wacom, group, ++next);
1443                 if (!next_led || next_led == cur)
1444                         return next_led;
1445         } while (next_led->cdev.trigger != &next_led->trigger);
1446
1447         return next_led;
1448 }
1449
1450 static void wacom_led_groups_release(void *data)
1451 {
1452         struct wacom *wacom = data;
1453
1454         wacom->led.groups = NULL;
1455         wacom->led.count = 0;
1456 }
1457
1458 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1459 {
1460         struct device *dev = &wacom->hdev->dev;
1461         struct wacom_group_leds *groups;
1462         int error;
1463
1464         groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
1465                               GFP_KERNEL);
1466         if (!groups)
1467                 return -ENOMEM;
1468
1469         error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1470         if (error)
1471                 return error;
1472
1473         wacom->led.groups = groups;
1474         wacom->led.count = count;
1475
1476         return 0;
1477 }
1478
1479 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1480                                          int led_per_group, bool read_only)
1481 {
1482         struct device *dev;
1483         int i, error;
1484
1485         if (!wacom->wacom_wac.pad_input)
1486                 return -EINVAL;
1487
1488         dev = &wacom->wacom_wac.pad_input->dev;
1489
1490         error = wacom_led_groups_allocate(wacom, group_count);
1491         if (error)
1492                 return error;
1493
1494         for (i = 0; i < group_count; i++) {
1495                 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1496                                                                 led_per_group,
1497                                                                 read_only);
1498                 if (error)
1499                         return error;
1500         }
1501
1502         return 0;
1503 }
1504
1505 int wacom_initialize_leds(struct wacom *wacom)
1506 {
1507         int error;
1508
1509         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1510                 return 0;
1511
1512         /* Initialize default values */
1513         switch (wacom->wacom_wac.features.type) {
1514         case HID_GENERIC:
1515                 if (!wacom->generic_has_leds)
1516                         return 0;
1517                 wacom->led.llv = 100;
1518                 wacom->led.max_llv = 100;
1519
1520                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1521                 if (error) {
1522                         hid_err(wacom->hdev,
1523                                 "cannot create leds err: %d\n", error);
1524                         return error;
1525                 }
1526
1527                 error = wacom_devm_sysfs_create_group(wacom,
1528                                                       &generic_led_attr_group);
1529                 break;
1530
1531         case INTUOS4S:
1532         case INTUOS4:
1533         case INTUOS4WL:
1534         case INTUOS4L:
1535                 wacom->led.llv = 10;
1536                 wacom->led.hlv = 20;
1537                 wacom->led.max_llv = 127;
1538                 wacom->led.max_hlv = 127;
1539                 wacom->led.img_lum = 10;
1540
1541                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1542                 if (error) {
1543                         hid_err(wacom->hdev,
1544                                 "cannot create leds err: %d\n", error);
1545                         return error;
1546                 }
1547
1548                 error = wacom_devm_sysfs_create_group(wacom,
1549                                                       &intuos4_led_attr_group);
1550                 break;
1551
1552         case WACOM_24HD:
1553         case WACOM_21UX2:
1554                 wacom->led.llv = 0;
1555                 wacom->led.hlv = 0;
1556                 wacom->led.img_lum = 0;
1557
1558                 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1559                 if (error) {
1560                         hid_err(wacom->hdev,
1561                                 "cannot create leds err: %d\n", error);
1562                         return error;
1563                 }
1564
1565                 error = wacom_devm_sysfs_create_group(wacom,
1566                                                       &cintiq_led_attr_group);
1567                 break;
1568
1569         case INTUOS5S:
1570         case INTUOS5:
1571         case INTUOS5L:
1572         case INTUOSPS:
1573         case INTUOSPM:
1574         case INTUOSPL:
1575                 wacom->led.llv = 32;
1576                 wacom->led.max_llv = 96;
1577
1578                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1579                 if (error) {
1580                         hid_err(wacom->hdev,
1581                                 "cannot create leds err: %d\n", error);
1582                         return error;
1583                 }
1584
1585                 error = wacom_devm_sysfs_create_group(wacom,
1586                                                       &intuos5_led_attr_group);
1587                 break;
1588
1589         case INTUOSP2_BT:
1590                 wacom->led.llv = 50;
1591                 wacom->led.max_llv = 100;
1592                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1593                 if (error) {
1594                         hid_err(wacom->hdev,
1595                                 "cannot create leds err: %d\n", error);
1596                         return error;
1597                 }
1598                 return 0;
1599
1600         case REMOTE:
1601                 wacom->led.llv = 255;
1602                 wacom->led.max_llv = 255;
1603                 error = wacom_led_groups_allocate(wacom, 5);
1604                 if (error) {
1605                         hid_err(wacom->hdev,
1606                                 "cannot create leds err: %d\n", error);
1607                         return error;
1608                 }
1609                 return 0;
1610
1611         default:
1612                 return 0;
1613         }
1614
1615         if (error) {
1616                 hid_err(wacom->hdev,
1617                         "cannot create sysfs group err: %d\n", error);
1618                 return error;
1619         }
1620
1621         return 0;
1622 }
1623
1624 static void wacom_init_work(struct work_struct *work)
1625 {
1626         struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1627
1628         _wacom_query_tablet_data(wacom);
1629         wacom_led_control(wacom);
1630 }
1631
1632 static void wacom_query_tablet_data(struct wacom *wacom)
1633 {
1634         schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1635 }
1636
1637 static enum power_supply_property wacom_battery_props[] = {
1638         POWER_SUPPLY_PROP_MODEL_NAME,
1639         POWER_SUPPLY_PROP_PRESENT,
1640         POWER_SUPPLY_PROP_STATUS,
1641         POWER_SUPPLY_PROP_SCOPE,
1642         POWER_SUPPLY_PROP_CAPACITY
1643 };
1644
1645 static int wacom_battery_get_property(struct power_supply *psy,
1646                                       enum power_supply_property psp,
1647                                       union power_supply_propval *val)
1648 {
1649         struct wacom_battery *battery = power_supply_get_drvdata(psy);
1650         int ret = 0;
1651
1652         switch (psp) {
1653                 case POWER_SUPPLY_PROP_MODEL_NAME:
1654                         val->strval = battery->wacom->wacom_wac.name;
1655                         break;
1656                 case POWER_SUPPLY_PROP_PRESENT:
1657                         val->intval = battery->bat_connected;
1658                         break;
1659                 case POWER_SUPPLY_PROP_SCOPE:
1660                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1661                         break;
1662                 case POWER_SUPPLY_PROP_CAPACITY:
1663                         val->intval = battery->battery_capacity;
1664                         break;
1665                 case POWER_SUPPLY_PROP_STATUS:
1666                         if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
1667                                 val->intval = battery->bat_status;
1668                         else if (battery->bat_charging)
1669                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1670                         else if (battery->battery_capacity == 100 &&
1671                                     battery->ps_connected)
1672                                 val->intval = POWER_SUPPLY_STATUS_FULL;
1673                         else if (battery->ps_connected)
1674                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1675                         else
1676                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1677                         break;
1678                 default:
1679                         ret = -EINVAL;
1680                         break;
1681         }
1682
1683         return ret;
1684 }
1685
1686 static int __wacom_initialize_battery(struct wacom *wacom,
1687                                       struct wacom_battery *battery)
1688 {
1689         static atomic_t battery_no = ATOMIC_INIT(0);
1690         struct device *dev = &wacom->hdev->dev;
1691         struct power_supply_config psy_cfg = { .drv_data = battery, };
1692         struct power_supply *ps_bat;
1693         struct power_supply_desc *bat_desc = &battery->bat_desc;
1694         unsigned long n;
1695         int error;
1696
1697         if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1698                 return -ENOMEM;
1699
1700         battery->wacom = wacom;
1701
1702         n = atomic_inc_return(&battery_no) - 1;
1703
1704         bat_desc->properties = wacom_battery_props;
1705         bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1706         bat_desc->get_property = wacom_battery_get_property;
1707         sprintf(battery->bat_name, "wacom_battery_%ld", n);
1708         bat_desc->name = battery->bat_name;
1709         bat_desc->type = POWER_SUPPLY_TYPE_USB;
1710         bat_desc->use_for_apm = 0;
1711
1712         ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1713         if (IS_ERR(ps_bat)) {
1714                 error = PTR_ERR(ps_bat);
1715                 goto err;
1716         }
1717
1718         power_supply_powers(ps_bat, &wacom->hdev->dev);
1719
1720         battery->battery = ps_bat;
1721
1722         devres_close_group(dev, bat_desc);
1723         return 0;
1724
1725 err:
1726         devres_release_group(dev, bat_desc);
1727         return error;
1728 }
1729
1730 static int wacom_initialize_battery(struct wacom *wacom)
1731 {
1732         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1733                 return __wacom_initialize_battery(wacom, &wacom->battery);
1734
1735         return 0;
1736 }
1737
1738 static void wacom_destroy_battery(struct wacom *wacom)
1739 {
1740         if (wacom->battery.battery) {
1741                 devres_release_group(&wacom->hdev->dev,
1742                                      &wacom->battery.bat_desc);
1743                 wacom->battery.battery = NULL;
1744         }
1745 }
1746
1747 static ssize_t wacom_show_speed(struct device *dev,
1748                                 struct device_attribute
1749                                 *attr, char *buf)
1750 {
1751         struct hid_device *hdev = to_hid_device(dev);
1752         struct wacom *wacom = hid_get_drvdata(hdev);
1753
1754         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1755 }
1756
1757 static ssize_t wacom_store_speed(struct device *dev,
1758                                 struct device_attribute *attr,
1759                                 const char *buf, size_t count)
1760 {
1761         struct hid_device *hdev = to_hid_device(dev);
1762         struct wacom *wacom = hid_get_drvdata(hdev);
1763         u8 new_speed;
1764
1765         if (kstrtou8(buf, 0, &new_speed))
1766                 return -EINVAL;
1767
1768         if (new_speed != 0 && new_speed != 1)
1769                 return -EINVAL;
1770
1771         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1772
1773         return count;
1774 }
1775
1776 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1777                 wacom_show_speed, wacom_store_speed);
1778
1779
1780 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1781                                       struct kobj_attribute *kattr,
1782                                       char *buf, int index)
1783 {
1784         struct device *dev = kobj_to_dev(kobj->parent);
1785         struct hid_device *hdev = to_hid_device(dev);
1786         struct wacom *wacom = hid_get_drvdata(hdev);
1787         u8 mode;
1788
1789         mode = wacom->led.groups[index].select;
1790         return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
1791 }
1792
1793 #define DEVICE_EKR_ATTR_GROUP(SET_ID)                                   \
1794 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,   \
1795                                struct kobj_attribute *kattr, char *buf) \
1796 {                                                                       \
1797         return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);        \
1798 }                                                                       \
1799 static struct kobj_attribute remote##SET_ID##_mode_attr = {             \
1800         .attr = {.name = "remote_mode",                                 \
1801                 .mode = DEV_ATTR_RO_PERM},                              \
1802         .show = wacom_show_remote##SET_ID##_mode,                       \
1803 };                                                                      \
1804 static struct attribute *remote##SET_ID##_serial_attrs[] = {            \
1805         &remote##SET_ID##_mode_attr.attr,                               \
1806         NULL                                                            \
1807 };                                                                      \
1808 static struct attribute_group remote##SET_ID##_serial_group = {         \
1809         .name = NULL,                                                   \
1810         .attrs = remote##SET_ID##_serial_attrs,                         \
1811 }
1812
1813 DEVICE_EKR_ATTR_GROUP(0);
1814 DEVICE_EKR_ATTR_GROUP(1);
1815 DEVICE_EKR_ATTR_GROUP(2);
1816 DEVICE_EKR_ATTR_GROUP(3);
1817 DEVICE_EKR_ATTR_GROUP(4);
1818
1819 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1820                                           int index)
1821 {
1822         int error = 0;
1823         struct wacom_remote *remote = wacom->remote;
1824
1825         remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1826                                                           GFP_KERNEL,
1827                                                           "%d", serial);
1828         if (!remote->remotes[index].group.name)
1829                 return -ENOMEM;
1830
1831         error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1832                                                 &remote->remotes[index].group);
1833         if (error) {
1834                 remote->remotes[index].group.name = NULL;
1835                 hid_err(wacom->hdev,
1836                         "cannot create sysfs group err: %d\n", error);
1837                 return error;
1838         }
1839
1840         return 0;
1841 }
1842
1843 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1844 {
1845         const size_t buf_size = 2;
1846         unsigned char *buf;
1847         int retval;
1848
1849         buf = kzalloc(buf_size, GFP_KERNEL);
1850         if (!buf)
1851                 return -ENOMEM;
1852
1853         buf[0] = WAC_CMD_DELETE_PAIRING;
1854         buf[1] = selector;
1855
1856         retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1857                                   buf_size, WAC_CMD_RETRIES);
1858         kfree(buf);
1859
1860         return retval;
1861 }
1862
1863 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1864                                          struct kobj_attribute *attr,
1865                                          const char *buf, size_t count)
1866 {
1867         unsigned char selector = 0;
1868         struct device *dev = kobj_to_dev(kobj->parent);
1869         struct hid_device *hdev = to_hid_device(dev);
1870         struct wacom *wacom = hid_get_drvdata(hdev);
1871         int err;
1872
1873         if (!strncmp(buf, "*\n", 2)) {
1874                 selector = WAC_CMD_UNPAIR_ALL;
1875         } else {
1876                 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1877                          buf);
1878                 return -1;
1879         }
1880
1881         mutex_lock(&wacom->lock);
1882
1883         err = wacom_cmd_unpair_remote(wacom, selector);
1884         mutex_unlock(&wacom->lock);
1885
1886         return err < 0 ? err : count;
1887 }
1888
1889 static struct kobj_attribute unpair_remote_attr = {
1890         .attr = {.name = "unpair_remote", .mode = 0200},
1891         .store = wacom_store_unpair_remote,
1892 };
1893
1894 static const struct attribute *remote_unpair_attrs[] = {
1895         &unpair_remote_attr.attr,
1896         NULL
1897 };
1898
1899 static void wacom_remotes_destroy(void *data)
1900 {
1901         struct wacom *wacom = data;
1902         struct wacom_remote *remote = wacom->remote;
1903
1904         if (!remote)
1905                 return;
1906
1907         kobject_put(remote->remote_dir);
1908         kfifo_free(&remote->remote_fifo);
1909         wacom->remote = NULL;
1910 }
1911
1912 static int wacom_initialize_remotes(struct wacom *wacom)
1913 {
1914         int error = 0;
1915         struct wacom_remote *remote;
1916         int i;
1917
1918         if (wacom->wacom_wac.features.type != REMOTE)
1919                 return 0;
1920
1921         remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1922                               GFP_KERNEL);
1923         if (!remote)
1924                 return -ENOMEM;
1925
1926         wacom->remote = remote;
1927
1928         spin_lock_init(&remote->remote_lock);
1929
1930         error = kfifo_alloc(&remote->remote_fifo,
1931                         5 * sizeof(struct wacom_remote_data),
1932                         GFP_KERNEL);
1933         if (error) {
1934                 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1935                 return -ENOMEM;
1936         }
1937
1938         remote->remotes[0].group = remote0_serial_group;
1939         remote->remotes[1].group = remote1_serial_group;
1940         remote->remotes[2].group = remote2_serial_group;
1941         remote->remotes[3].group = remote3_serial_group;
1942         remote->remotes[4].group = remote4_serial_group;
1943
1944         remote->remote_dir = kobject_create_and_add("wacom_remote",
1945                                                     &wacom->hdev->dev.kobj);
1946         if (!remote->remote_dir)
1947                 return -ENOMEM;
1948
1949         error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1950
1951         if (error) {
1952                 hid_err(wacom->hdev,
1953                         "cannot create sysfs group err: %d\n", error);
1954                 return error;
1955         }
1956
1957         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1958                 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1959                 remote->remotes[i].serial = 0;
1960         }
1961
1962         error = devm_add_action_or_reset(&wacom->hdev->dev,
1963                                          wacom_remotes_destroy, wacom);
1964         if (error)
1965                 return error;
1966
1967         return 0;
1968 }
1969
1970 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1971 {
1972         struct input_dev *input_dev;
1973         struct hid_device *hdev = wacom->hdev;
1974         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1975
1976         input_dev = devm_input_allocate_device(&hdev->dev);
1977         if (!input_dev)
1978                 return NULL;
1979
1980         input_dev->name = wacom_wac->features.name;
1981         input_dev->phys = hdev->phys;
1982         input_dev->dev.parent = &hdev->dev;
1983         input_dev->open = wacom_open;
1984         input_dev->close = wacom_close;
1985         input_dev->uniq = hdev->uniq;
1986         input_dev->id.bustype = hdev->bus;
1987         input_dev->id.vendor  = hdev->vendor;
1988         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1989         input_dev->id.version = hdev->version;
1990         input_set_drvdata(input_dev, wacom);
1991
1992         return input_dev;
1993 }
1994
1995 static int wacom_allocate_inputs(struct wacom *wacom)
1996 {
1997         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1998
1999         wacom_wac->pen_input = wacom_allocate_input(wacom);
2000         wacom_wac->touch_input = wacom_allocate_input(wacom);
2001         wacom_wac->pad_input = wacom_allocate_input(wacom);
2002         if (!wacom_wac->pen_input ||
2003             !wacom_wac->touch_input ||
2004             !wacom_wac->pad_input)
2005                 return -ENOMEM;
2006
2007         wacom_wac->pen_input->name = wacom_wac->pen_name;
2008         wacom_wac->touch_input->name = wacom_wac->touch_name;
2009         wacom_wac->pad_input->name = wacom_wac->pad_name;
2010
2011         return 0;
2012 }
2013
2014 static int wacom_register_inputs(struct wacom *wacom)
2015 {
2016         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
2017         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2018         int error = 0;
2019
2020         pen_input_dev = wacom_wac->pen_input;
2021         touch_input_dev = wacom_wac->touch_input;
2022         pad_input_dev = wacom_wac->pad_input;
2023
2024         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
2025                 return -EINVAL;
2026
2027         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
2028         if (error) {
2029                 /* no pen in use on this interface */
2030                 input_free_device(pen_input_dev);
2031                 wacom_wac->pen_input = NULL;
2032                 pen_input_dev = NULL;
2033         } else {
2034                 error = input_register_device(pen_input_dev);
2035                 if (error)
2036                         goto fail;
2037         }
2038
2039         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
2040         if (error) {
2041                 /* no touch in use on this interface */
2042                 input_free_device(touch_input_dev);
2043                 wacom_wac->touch_input = NULL;
2044                 touch_input_dev = NULL;
2045         } else {
2046                 error = input_register_device(touch_input_dev);
2047                 if (error)
2048                         goto fail;
2049         }
2050
2051         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
2052         if (error) {
2053                 /* no pad in use on this interface */
2054                 input_free_device(pad_input_dev);
2055                 wacom_wac->pad_input = NULL;
2056                 pad_input_dev = NULL;
2057         } else {
2058                 error = input_register_device(pad_input_dev);
2059                 if (error)
2060                         goto fail;
2061         }
2062
2063         return 0;
2064
2065 fail:
2066         wacom_wac->pad_input = NULL;
2067         wacom_wac->touch_input = NULL;
2068         wacom_wac->pen_input = NULL;
2069         return error;
2070 }
2071
2072 /*
2073  * Not all devices report physical dimensions from HID.
2074  * Compute the default from hardcoded logical dimension
2075  * and resolution before driver overwrites them.
2076  */
2077 static void wacom_set_default_phy(struct wacom_features *features)
2078 {
2079         if (features->x_resolution) {
2080                 features->x_phy = (features->x_max * 100) /
2081                                         features->x_resolution;
2082                 features->y_phy = (features->y_max * 100) /
2083                                         features->y_resolution;
2084         }
2085 }
2086
2087 static void wacom_calculate_res(struct wacom_features *features)
2088 {
2089         /* set unit to "100th of a mm" for devices not reported by HID */
2090         if (!features->unit) {
2091                 features->unit = 0x11;
2092                 features->unitExpo = -3;
2093         }
2094
2095         features->x_resolution = wacom_calc_hid_res(features->x_max,
2096                                                     features->x_phy,
2097                                                     features->unit,
2098                                                     features->unitExpo);
2099         features->y_resolution = wacom_calc_hid_res(features->y_max,
2100                                                     features->y_phy,
2101                                                     features->unit,
2102                                                     features->unitExpo);
2103 }
2104
2105 void wacom_battery_work(struct work_struct *work)
2106 {
2107         struct wacom *wacom = container_of(work, struct wacom, battery_work);
2108
2109         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2110              !wacom->battery.battery) {
2111                 wacom_initialize_battery(wacom);
2112         }
2113         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2114                  wacom->battery.battery) {
2115                 wacom_destroy_battery(wacom);
2116         }
2117 }
2118
2119 static size_t wacom_compute_pktlen(struct hid_device *hdev)
2120 {
2121         struct hid_report_enum *report_enum;
2122         struct hid_report *report;
2123         size_t size = 0;
2124
2125         report_enum = hdev->report_enum + HID_INPUT_REPORT;
2126
2127         list_for_each_entry(report, &report_enum->report_list, list) {
2128                 size_t report_size = hid_report_len(report);
2129                 if (report_size > size)
2130                         size = report_size;
2131         }
2132
2133         return size;
2134 }
2135
2136 static void wacom_update_name(struct wacom *wacom, const char *suffix)
2137 {
2138         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2139         struct wacom_features *features = &wacom_wac->features;
2140         char name[WACOM_NAME_MAX];
2141
2142         /* Generic devices name unspecified */
2143         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2144                 char *product_name = wacom->hdev->name;
2145
2146                 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
2147                         struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
2148                         struct usb_device *dev = interface_to_usbdev(intf);
2149                         product_name = dev->product;
2150                 }
2151
2152                 if (wacom->hdev->bus == BUS_I2C) {
2153                         snprintf(name, sizeof(name), "%s %X",
2154                                  features->name, wacom->hdev->product);
2155                 } else if (strstr(product_name, "Wacom") ||
2156                            strstr(product_name, "wacom") ||
2157                            strstr(product_name, "WACOM")) {
2158                         strlcpy(name, product_name, sizeof(name));
2159                 } else {
2160                         snprintf(name, sizeof(name), "Wacom %s", product_name);
2161                 }
2162
2163                 /* strip out excess whitespaces */
2164                 while (1) {
2165                         char *gap = strstr(name, "  ");
2166                         if (gap == NULL)
2167                                 break;
2168                         /* shift everything including the terminator */
2169                         memmove(gap, gap+1, strlen(gap));
2170                 }
2171
2172                 /* get rid of trailing whitespace */
2173                 if (name[strlen(name)-1] == ' ')
2174                         name[strlen(name)-1] = '\0';
2175         } else {
2176                 strlcpy(name, features->name, sizeof(name));
2177         }
2178
2179         snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2180                  name, suffix);
2181
2182         /* Append the device type to the name */
2183         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
2184                 "%s%s Pen", name, suffix);
2185         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
2186                 "%s%s Finger", name, suffix);
2187         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
2188                 "%s%s Pad", name, suffix);
2189 }
2190
2191 static void wacom_release_resources(struct wacom *wacom)
2192 {
2193         struct hid_device *hdev = wacom->hdev;
2194
2195         if (!wacom->resources)
2196                 return;
2197
2198         devres_release_group(&hdev->dev, wacom);
2199
2200         wacom->resources = false;
2201
2202         wacom->wacom_wac.pen_input = NULL;
2203         wacom->wacom_wac.touch_input = NULL;
2204         wacom->wacom_wac.pad_input = NULL;
2205 }
2206
2207 static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
2208 {
2209         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
2210                 wacom_wac->shared->type = wacom_wac->features.type;
2211                 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2212         }
2213
2214         if (wacom_wac->has_mute_touch_switch) {
2215                 wacom_wac->shared->has_mute_touch_switch = true;
2216                 wacom_wac->shared->is_touch_on = true;
2217         }
2218
2219         if (wacom_wac->shared->has_mute_touch_switch &&
2220             wacom_wac->shared->touch_input) {
2221                 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
2222                 input_set_capability(wacom_wac->shared->touch_input, EV_SW,
2223                                      SW_MUTE_DEVICE);
2224         }
2225 }
2226
2227 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2228 {
2229         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2230         struct wacom_features *features = &wacom_wac->features;
2231         struct hid_device *hdev = wacom->hdev;
2232         int error;
2233         unsigned int connect_mask = HID_CONNECT_HIDRAW;
2234
2235         features->pktlen = wacom_compute_pktlen(hdev);
2236         if (features->pktlen > WACOM_PKGLEN_MAX)
2237                 return -EINVAL;
2238
2239         if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2240                 return -ENOMEM;
2241
2242         wacom->resources = true;
2243
2244         error = wacom_allocate_inputs(wacom);
2245         if (error)
2246                 goto fail;
2247
2248         /*
2249          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2250          * into debug mode for the touch part.
2251          * We ignore the other interfaces.
2252          */
2253         if (features->type == BAMBOO_PAD) {
2254                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2255                         features->type = HID_GENERIC;
2256                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2257                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2258                         error = -ENODEV;
2259                         goto fail;
2260                 }
2261         }
2262
2263         /* set the default size in case we do not get them from hid */
2264         wacom_set_default_phy(features);
2265
2266         /* Retrieve the physical and logical size for touch devices */
2267         wacom_retrieve_hid_descriptor(hdev, features);
2268         wacom_setup_device_quirks(wacom);
2269
2270         if (features->device_type == WACOM_DEVICETYPE_NONE &&
2271             features->type != WIRELESS) {
2272                 error = features->type == HID_GENERIC ? -ENODEV : 0;
2273
2274                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2275                          hdev->name,
2276                          error ? "Ignoring" : "Assuming pen");
2277
2278                 if (error)
2279                         goto fail;
2280
2281                 features->device_type |= WACOM_DEVICETYPE_PEN;
2282         }
2283
2284         wacom_calculate_res(features);
2285
2286         wacom_update_name(wacom, wireless ? " (WL)" : "");
2287
2288         /* pen only Bamboo neither support touch nor pad */
2289         if ((features->type == BAMBOO_PEN) &&
2290             ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2291             (features->device_type & WACOM_DEVICETYPE_PAD))) {
2292                 error = -ENODEV;
2293                 goto fail;
2294         }
2295
2296         error = wacom_add_shared_data(hdev);
2297         if (error)
2298                 goto fail;
2299
2300         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2301              (features->quirks & WACOM_QUIRK_BATTERY)) {
2302                 error = wacom_initialize_battery(wacom);
2303                 if (error)
2304                         goto fail;
2305         }
2306
2307         error = wacom_register_inputs(wacom);
2308         if (error)
2309                 goto fail;
2310
2311         if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2312                 error = wacom_initialize_leds(wacom);
2313                 if (error)
2314                         goto fail;
2315
2316                 error = wacom_initialize_remotes(wacom);
2317                 if (error)
2318                         goto fail;
2319         }
2320
2321         if (features->type == HID_GENERIC)
2322                 connect_mask |= HID_CONNECT_DRIVER;
2323
2324         /* Regular HID work starts now */
2325         error = hid_hw_start(hdev, connect_mask);
2326         if (error) {
2327                 hid_err(hdev, "hw start failed\n");
2328                 goto fail;
2329         }
2330
2331         if (!wireless) {
2332                 /* Note that if query fails it is not a hard failure */
2333                 wacom_query_tablet_data(wacom);
2334         }
2335
2336         /* touch only Bamboo doesn't support pen */
2337         if ((features->type == BAMBOO_TOUCH) &&
2338             (features->device_type & WACOM_DEVICETYPE_PEN)) {
2339                 cancel_delayed_work_sync(&wacom->init_work);
2340                 _wacom_query_tablet_data(wacom);
2341                 error = -ENODEV;
2342                 goto fail_quirks;
2343         }
2344
2345         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2346                 error = hid_hw_open(hdev);
2347
2348         wacom_set_shared_values(wacom_wac);
2349         devres_close_group(&hdev->dev, wacom);
2350
2351         return 0;
2352
2353 fail_quirks:
2354         hid_hw_stop(hdev);
2355 fail:
2356         wacom_release_resources(wacom);
2357         return error;
2358 }
2359
2360 static void wacom_wireless_work(struct work_struct *work)
2361 {
2362         struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2363         struct usb_device *usbdev = wacom->usbdev;
2364         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2365         struct hid_device *hdev1, *hdev2;
2366         struct wacom *wacom1, *wacom2;
2367         struct wacom_wac *wacom_wac1, *wacom_wac2;
2368         int error;
2369
2370         /*
2371          * Regardless if this is a disconnect or a new tablet,
2372          * remove any existing input and battery devices.
2373          */
2374
2375         wacom_destroy_battery(wacom);
2376
2377         /* Stylus interface */
2378         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2379         wacom1 = hid_get_drvdata(hdev1);
2380         wacom_wac1 = &(wacom1->wacom_wac);
2381         wacom_release_resources(wacom1);
2382
2383         /* Touch interface */
2384         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2385         wacom2 = hid_get_drvdata(hdev2);
2386         wacom_wac2 = &(wacom2->wacom_wac);
2387         wacom_release_resources(wacom2);
2388
2389         if (wacom_wac->pid == 0) {
2390                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2391         } else {
2392                 const struct hid_device_id *id = wacom_ids;
2393
2394                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2395                          wacom_wac->pid);
2396
2397                 while (id->bus) {
2398                         if (id->vendor == USB_VENDOR_ID_WACOM &&
2399                             id->product == wacom_wac->pid)
2400                                 break;
2401                         id++;
2402                 }
2403
2404                 if (!id->bus) {
2405                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
2406                         return;
2407                 }
2408
2409                 /* Stylus interface */
2410                 wacom_wac1->features =
2411                         *((struct wacom_features *)id->driver_data);
2412
2413                 wacom_wac1->pid = wacom_wac->pid;
2414                 hid_hw_stop(hdev1);
2415                 error = wacom_parse_and_register(wacom1, true);
2416                 if (error)
2417                         goto fail;
2418
2419                 /* Touch interface */
2420                 if (wacom_wac1->features.touch_max ||
2421                     (wacom_wac1->features.type >= INTUOSHT &&
2422                     wacom_wac1->features.type <= BAMBOO_PT)) {
2423                         wacom_wac2->features =
2424                                 *((struct wacom_features *)id->driver_data);
2425                         wacom_wac2->pid = wacom_wac->pid;
2426                         hid_hw_stop(hdev2);
2427                         error = wacom_parse_and_register(wacom2, true);
2428                         if (error)
2429                                 goto fail;
2430                 }
2431
2432                 strlcpy(wacom_wac->name, wacom_wac1->name,
2433                         sizeof(wacom_wac->name));
2434                 error = wacom_initialize_battery(wacom);
2435                 if (error)
2436                         goto fail;
2437         }
2438
2439         return;
2440
2441 fail:
2442         wacom_release_resources(wacom1);
2443         wacom_release_resources(wacom2);
2444         return;
2445 }
2446
2447 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2448 {
2449         struct wacom_remote *remote = wacom->remote;
2450         u32 serial = remote->remotes[index].serial;
2451         int i;
2452         unsigned long flags;
2453
2454         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2455                 if (remote->remotes[i].serial == serial) {
2456
2457                         spin_lock_irqsave(&remote->remote_lock, flags);
2458                         remote->remotes[i].registered = false;
2459                         spin_unlock_irqrestore(&remote->remote_lock, flags);
2460
2461                         if (remote->remotes[i].battery.battery)
2462                                 devres_release_group(&wacom->hdev->dev,
2463                                                      &remote->remotes[i].battery.bat_desc);
2464
2465                         if (remote->remotes[i].group.name)
2466                                 devres_release_group(&wacom->hdev->dev,
2467                                                      &remote->remotes[i]);
2468
2469                         remote->remotes[i].serial = 0;
2470                         remote->remotes[i].group.name = NULL;
2471                         remote->remotes[i].battery.battery = NULL;
2472                         wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2473                 }
2474         }
2475 }
2476
2477 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2478                                    unsigned int index)
2479 {
2480         struct wacom_remote *remote = wacom->remote;
2481         struct device *dev = &wacom->hdev->dev;
2482         int error, k;
2483
2484         /* A remote can pair more than once with an EKR,
2485          * check to make sure this serial isn't already paired.
2486          */
2487         for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2488                 if (remote->remotes[k].serial == serial)
2489                         break;
2490         }
2491
2492         if (k < WACOM_MAX_REMOTES) {
2493                 remote->remotes[index].serial = serial;
2494                 return 0;
2495         }
2496
2497         if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2498                 return -ENOMEM;
2499
2500         error = wacom_remote_create_attr_group(wacom, serial, index);
2501         if (error)
2502                 goto fail;
2503
2504         remote->remotes[index].input = wacom_allocate_input(wacom);
2505         if (!remote->remotes[index].input) {
2506                 error = -ENOMEM;
2507                 goto fail;
2508         }
2509         remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2510         remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2511
2512         if (!remote->remotes[index].input->name) {
2513                 error = -EINVAL;
2514                 goto fail;
2515         }
2516
2517         error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2518                                                    &wacom->wacom_wac);
2519         if (error)
2520                 goto fail;
2521
2522         remote->remotes[index].serial = serial;
2523
2524         error = input_register_device(remote->remotes[index].input);
2525         if (error)
2526                 goto fail;
2527
2528         error = wacom_led_groups_alloc_and_register_one(
2529                                         &remote->remotes[index].input->dev,
2530                                         wacom, index, 3, true);
2531         if (error)
2532                 goto fail;
2533
2534         remote->remotes[index].registered = true;
2535
2536         devres_close_group(dev, &remote->remotes[index]);
2537         return 0;
2538
2539 fail:
2540         devres_release_group(dev, &remote->remotes[index]);
2541         remote->remotes[index].serial = 0;
2542         return error;
2543 }
2544
2545 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2546 {
2547         struct wacom_remote *remote = wacom->remote;
2548         int error;
2549
2550         if (!remote->remotes[index].registered)
2551                 return 0;
2552
2553         if (remote->remotes[index].battery.battery)
2554                 return 0;
2555
2556         if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2557                 return 0;
2558
2559         error = __wacom_initialize_battery(wacom,
2560                                         &wacom->remote->remotes[index].battery);
2561         if (error)
2562                 return error;
2563
2564         return 0;
2565 }
2566
2567 static void wacom_remote_work(struct work_struct *work)
2568 {
2569         struct wacom *wacom = container_of(work, struct wacom, remote_work);
2570         struct wacom_remote *remote = wacom->remote;
2571         struct wacom_remote_data data;
2572         unsigned long flags;
2573         unsigned int count;
2574         u32 serial;
2575         int i;
2576
2577         spin_lock_irqsave(&remote->remote_lock, flags);
2578
2579         count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2580
2581         if (count != sizeof(data)) {
2582                 hid_err(wacom->hdev,
2583                         "workitem triggered without status available\n");
2584                 spin_unlock_irqrestore(&remote->remote_lock, flags);
2585                 return;
2586         }
2587
2588         if (!kfifo_is_empty(&remote->remote_fifo))
2589                 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2590
2591         spin_unlock_irqrestore(&remote->remote_lock, flags);
2592
2593         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2594                 serial = data.remote[i].serial;
2595                 if (data.remote[i].connected) {
2596
2597                         if (remote->remotes[i].serial == serial) {
2598                                 wacom_remote_attach_battery(wacom, i);
2599                                 continue;
2600                         }
2601
2602                         if (remote->remotes[i].serial)
2603                                 wacom_remote_destroy_one(wacom, i);
2604
2605                         wacom_remote_create_one(wacom, serial, i);
2606
2607                 } else if (remote->remotes[i].serial) {
2608                         wacom_remote_destroy_one(wacom, i);
2609                 }
2610         }
2611 }
2612
2613 static void wacom_mode_change_work(struct work_struct *work)
2614 {
2615         struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
2616         struct wacom_shared *shared = wacom->wacom_wac.shared;
2617         struct wacom *wacom1 = NULL;
2618         struct wacom *wacom2 = NULL;
2619         bool is_direct = wacom->wacom_wac.is_direct_mode;
2620         int error = 0;
2621
2622         if (shared->pen) {
2623                 wacom1 = hid_get_drvdata(shared->pen);
2624                 wacom_release_resources(wacom1);
2625                 hid_hw_stop(wacom1->hdev);
2626                 wacom1->wacom_wac.has_mode_change = true;
2627                 wacom1->wacom_wac.is_direct_mode = is_direct;
2628         }
2629
2630         if (shared->touch) {
2631                 wacom2 = hid_get_drvdata(shared->touch);
2632                 wacom_release_resources(wacom2);
2633                 hid_hw_stop(wacom2->hdev);
2634                 wacom2->wacom_wac.has_mode_change = true;
2635                 wacom2->wacom_wac.is_direct_mode = is_direct;
2636         }
2637
2638         if (wacom1) {
2639                 error = wacom_parse_and_register(wacom1, false);
2640                 if (error)
2641                         return;
2642         }
2643
2644         if (wacom2) {
2645                 error = wacom_parse_and_register(wacom2, false);
2646                 if (error)
2647                         return;
2648         }
2649
2650         return;
2651 }
2652
2653 static int wacom_probe(struct hid_device *hdev,
2654                 const struct hid_device_id *id)
2655 {
2656         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2657         struct usb_device *dev = interface_to_usbdev(intf);
2658         struct wacom *wacom;
2659         struct wacom_wac *wacom_wac;
2660         struct wacom_features *features;
2661         int error;
2662
2663         if (!id->driver_data)
2664                 return -EINVAL;
2665
2666         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2667
2668         /* hid-core sets this quirk for the boot interface */
2669         hdev->quirks &= ~HID_QUIRK_NOGET;
2670
2671         wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2672         if (!wacom)
2673                 return -ENOMEM;
2674
2675         hid_set_drvdata(hdev, wacom);
2676         wacom->hdev = hdev;
2677
2678         wacom_wac = &wacom->wacom_wac;
2679         wacom_wac->features = *((struct wacom_features *)id->driver_data);
2680         features = &wacom_wac->features;
2681
2682         if (features->check_for_hid_type && features->hid_type != hdev->type) {
2683                 error = -ENODEV;
2684                 goto fail;
2685         }
2686
2687         error = kfifo_alloc(&wacom_wac->pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL);
2688         if (error)
2689                 goto fail;
2690
2691         wacom_wac->hid_data.inputmode = -1;
2692         wacom_wac->mode_report = -1;
2693
2694         wacom->usbdev = dev;
2695         wacom->intf = intf;
2696         mutex_init(&wacom->lock);
2697         INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
2698         INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2699         INIT_WORK(&wacom->battery_work, wacom_battery_work);
2700         INIT_WORK(&wacom->remote_work, wacom_remote_work);
2701         INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
2702
2703         /* ask for the report descriptor to be loaded by HID */
2704         error = hid_parse(hdev);
2705         if (error) {
2706                 hid_err(hdev, "parse failed\n");
2707                 goto fail;
2708         }
2709
2710         error = wacom_parse_and_register(wacom, false);
2711         if (error)
2712                 goto fail;
2713
2714         if (hdev->bus == BUS_BLUETOOTH) {
2715                 error = device_create_file(&hdev->dev, &dev_attr_speed);
2716                 if (error)
2717                         hid_warn(hdev,
2718                                  "can't create sysfs speed attribute err: %d\n",
2719                                  error);
2720         }
2721
2722         return 0;
2723
2724 fail:
2725         hid_set_drvdata(hdev, NULL);
2726         return error;
2727 }
2728
2729 static void wacom_remove(struct hid_device *hdev)
2730 {
2731         struct wacom *wacom = hid_get_drvdata(hdev);
2732         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2733         struct wacom_features *features = &wacom_wac->features;
2734
2735         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2736                 hid_hw_close(hdev);
2737
2738         hid_hw_stop(hdev);
2739
2740         cancel_delayed_work_sync(&wacom->init_work);
2741         cancel_work_sync(&wacom->wireless_work);
2742         cancel_work_sync(&wacom->battery_work);
2743         cancel_work_sync(&wacom->remote_work);
2744         cancel_work_sync(&wacom->mode_change_work);
2745         if (hdev->bus == BUS_BLUETOOTH)
2746                 device_remove_file(&hdev->dev, &dev_attr_speed);
2747
2748         /* make sure we don't trigger the LEDs */
2749         wacom_led_groups_release(wacom);
2750
2751         if (wacom->wacom_wac.features.type != REMOTE)
2752                 wacom_release_resources(wacom);
2753
2754         kfifo_free(&wacom_wac->pen_fifo);
2755
2756         hid_set_drvdata(hdev, NULL);
2757 }
2758
2759 #ifdef CONFIG_PM
2760 static int wacom_resume(struct hid_device *hdev)
2761 {
2762         struct wacom *wacom = hid_get_drvdata(hdev);
2763
2764         mutex_lock(&wacom->lock);
2765
2766         /* switch to wacom mode first */
2767         _wacom_query_tablet_data(wacom);
2768         wacom_led_control(wacom);
2769
2770         mutex_unlock(&wacom->lock);
2771
2772         return 0;
2773 }
2774
2775 static int wacom_reset_resume(struct hid_device *hdev)
2776 {
2777         return wacom_resume(hdev);
2778 }
2779 #endif /* CONFIG_PM */
2780
2781 static struct hid_driver wacom_driver = {
2782         .name =         "wacom",
2783         .id_table =     wacom_ids,
2784         .probe =        wacom_probe,
2785         .remove =       wacom_remove,
2786         .report =       wacom_wac_report,
2787 #ifdef CONFIG_PM
2788         .resume =       wacom_resume,
2789         .reset_resume = wacom_reset_resume,
2790 #endif
2791         .raw_event =    wacom_raw_event,
2792 };
2793 module_hid_driver(wacom_driver);
2794
2795 MODULE_VERSION(DRIVER_VERSION);
2796 MODULE_AUTHOR(DRIVER_AUTHOR);
2797 MODULE_DESCRIPTION(DRIVER_DESC);
2798 MODULE_LICENSE("GPL");