d6797535fff97217b477cf7c2009397dcce2d1ec
[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         u32 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         /* 2nd-generation Intuos Pro Large has incorrect Y maximum */
399         if (hdev->vendor == USB_VENDOR_ID_WACOM &&
400             hdev->product == 0x0358 &&
401             WACOM_PEN_FIELD(field) &&
402             wacom_equivalent_usage(usage->hid) == HID_GD_Y) {
403                 field->logical_maximum = 43200;
404         }
405
406         switch (usage->hid) {
407         case HID_GD_X:
408                 features->x_max = field->logical_maximum;
409                 if (finger) {
410                         features->x_phy = field->physical_maximum;
411                         if ((features->type != BAMBOO_PT) &&
412                             (features->type != BAMBOO_TOUCH)) {
413                                 features->unit = field->unit;
414                                 features->unitExpo = field->unit_exponent;
415                         }
416                 }
417                 break;
418         case HID_GD_Y:
419                 features->y_max = field->logical_maximum;
420                 if (finger) {
421                         features->y_phy = field->physical_maximum;
422                         if ((features->type != BAMBOO_PT) &&
423                             (features->type != BAMBOO_TOUCH)) {
424                                 features->unit = field->unit;
425                                 features->unitExpo = field->unit_exponent;
426                         }
427                 }
428                 break;
429         case HID_DG_TIPPRESSURE:
430                 if (pen)
431                         features->pressure_max = field->logical_maximum;
432                 break;
433         }
434
435         if (features->type == HID_GENERIC)
436                 wacom_wac_usage_mapping(hdev, field, usage);
437 }
438
439 static void wacom_post_parse_hid(struct hid_device *hdev,
440                                  struct wacom_features *features)
441 {
442         struct wacom *wacom = hid_get_drvdata(hdev);
443         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
444
445         if (features->type == HID_GENERIC) {
446                 /* Any last-minute generic device setup */
447                 if (wacom_wac->has_mode_change) {
448                         if (wacom_wac->is_direct_mode)
449                                 features->device_type |= WACOM_DEVICETYPE_DIRECT;
450                         else
451                                 features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
452                 }
453
454                 if (features->touch_max > 1) {
455                         if (features->device_type & WACOM_DEVICETYPE_DIRECT)
456                                 input_mt_init_slots(wacom_wac->touch_input,
457                                                     wacom_wac->features.touch_max,
458                                                     INPUT_MT_DIRECT);
459                         else
460                                 input_mt_init_slots(wacom_wac->touch_input,
461                                                     wacom_wac->features.touch_max,
462                                                     INPUT_MT_POINTER);
463                 }
464         }
465 }
466
467 static void wacom_parse_hid(struct hid_device *hdev,
468                            struct wacom_features *features)
469 {
470         struct hid_report_enum *rep_enum;
471         struct hid_report *hreport;
472         int i, j;
473
474         /* check features first */
475         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
476         list_for_each_entry(hreport, &rep_enum->report_list, list) {
477                 for (i = 0; i < hreport->maxfield; i++) {
478                         /* Ignore if report count is out of bounds. */
479                         if (hreport->field[i]->report_count < 1)
480                                 continue;
481
482                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
483                                 wacom_feature_mapping(hdev, hreport->field[i],
484                                                 hreport->field[i]->usage + j);
485                         }
486                 }
487         }
488
489         /* now check the input usages */
490         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
491         list_for_each_entry(hreport, &rep_enum->report_list, list) {
492
493                 if (!hreport->maxfield)
494                         continue;
495
496                 for (i = 0; i < hreport->maxfield; i++)
497                         for (j = 0; j < hreport->field[i]->maxusage; j++)
498                                 wacom_usage_mapping(hdev, hreport->field[i],
499                                                 hreport->field[i]->usage + j);
500         }
501
502         wacom_post_parse_hid(hdev, features);
503 }
504
505 static int wacom_hid_set_device_mode(struct hid_device *hdev)
506 {
507         struct wacom *wacom = hid_get_drvdata(hdev);
508         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
509         struct hid_report *r;
510         struct hid_report_enum *re;
511
512         if (hid_data->inputmode < 0)
513                 return 0;
514
515         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
516         r = re->report_id_hash[hid_data->inputmode];
517         if (r) {
518                 r->field[0]->value[hid_data->inputmode_index] = 2;
519                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
520         }
521         return 0;
522 }
523
524 static int wacom_set_device_mode(struct hid_device *hdev,
525                                  struct wacom_wac *wacom_wac)
526 {
527         u8 *rep_data;
528         struct hid_report *r;
529         struct hid_report_enum *re;
530         u32 length;
531         int error = -ENOMEM, limit = 0;
532
533         if (wacom_wac->mode_report < 0)
534                 return 0;
535
536         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
537         r = re->report_id_hash[wacom_wac->mode_report];
538         if (!r)
539                 return -EINVAL;
540
541         rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
542         if (!rep_data)
543                 return -ENOMEM;
544
545         length = hid_report_len(r);
546
547         do {
548                 rep_data[0] = wacom_wac->mode_report;
549                 rep_data[1] = wacom_wac->mode_value;
550
551                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
552                                          length, 1);
553                 if (error >= 0)
554                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
555                                                  rep_data, length, 1);
556         } while (error >= 0 &&
557                  rep_data[1] != wacom_wac->mode_report &&
558                  limit++ < WAC_MSG_RETRIES);
559
560         kfree(rep_data);
561
562         return error < 0 ? error : 0;
563 }
564
565 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
566                 struct wacom_features *features)
567 {
568         struct wacom *wacom = hid_get_drvdata(hdev);
569         int ret;
570         u8 rep_data[2];
571
572         switch (features->type) {
573         case GRAPHIRE_BT:
574                 rep_data[0] = 0x03;
575                 rep_data[1] = 0x00;
576                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
577                                         3);
578
579                 if (ret >= 0) {
580                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
581                         rep_data[1] = 0x00;
582
583                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
584                                                 rep_data, 2, 3);
585
586                         if (ret >= 0) {
587                                 wacom->wacom_wac.bt_high_speed = speed;
588                                 return 0;
589                         }
590                 }
591
592                 /*
593                  * Note that if the raw queries fail, it's not a hard failure
594                  * and it is safe to continue
595                  */
596                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
597                          rep_data[0], ret);
598                 break;
599         case INTUOS4WL:
600                 if (speed == 1)
601                         wacom->wacom_wac.bt_features &= ~0x20;
602                 else
603                         wacom->wacom_wac.bt_features |= 0x20;
604
605                 rep_data[0] = 0x03;
606                 rep_data[1] = wacom->wacom_wac.bt_features;
607
608                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
609                                         1);
610                 if (ret >= 0)
611                         wacom->wacom_wac.bt_high_speed = speed;
612                 break;
613         }
614
615         return 0;
616 }
617
618 /*
619  * Switch the tablet into its most-capable mode. Wacom tablets are
620  * typically configured to power-up in a mode which sends mouse-like
621  * reports to the OS. To get absolute position, pressure data, etc.
622  * from the tablet, it is necessary to switch the tablet out of this
623  * mode and into one which sends the full range of tablet data.
624  */
625 static int _wacom_query_tablet_data(struct wacom *wacom)
626 {
627         struct hid_device *hdev = wacom->hdev;
628         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
629         struct wacom_features *features = &wacom_wac->features;
630
631         if (hdev->bus == BUS_BLUETOOTH)
632                 return wacom_bt_query_tablet_data(hdev, 1, features);
633
634         if (features->type != HID_GENERIC) {
635                 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
636                         if (features->type > TABLETPC) {
637                                 /* MT Tablet PC touch */
638                                 wacom_wac->mode_report = 3;
639                                 wacom_wac->mode_value = 4;
640                         } else if (features->type == WACOM_24HDT) {
641                                 wacom_wac->mode_report = 18;
642                                 wacom_wac->mode_value = 2;
643                         } else if (features->type == WACOM_27QHDT) {
644                                 wacom_wac->mode_report = 131;
645                                 wacom_wac->mode_value = 2;
646                         } else if (features->type == BAMBOO_PAD) {
647                                 wacom_wac->mode_report = 2;
648                                 wacom_wac->mode_value = 2;
649                         }
650                 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
651                         if (features->type <= BAMBOO_PT) {
652                                 wacom_wac->mode_report = 2;
653                                 wacom_wac->mode_value = 2;
654                         }
655                 }
656         }
657
658         wacom_set_device_mode(hdev, wacom_wac);
659
660         if (features->type == HID_GENERIC)
661                 return wacom_hid_set_device_mode(hdev);
662
663         return 0;
664 }
665
666 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
667                                          struct wacom_features *features)
668 {
669         struct wacom *wacom = hid_get_drvdata(hdev);
670         struct usb_interface *intf = wacom->intf;
671
672         /* default features */
673         features->x_fuzz = 4;
674         features->y_fuzz = 4;
675         features->pressure_fuzz = 0;
676         features->distance_fuzz = 1;
677         features->tilt_fuzz = 1;
678
679         /*
680          * The wireless device HID is basic and layout conflicts with
681          * other tablets (monitor and touch interface can look like pen).
682          * Skip the query for this type and modify defaults based on
683          * interface number.
684          */
685         if (features->type == WIRELESS) {
686                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
687                         features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
688                 else
689                         features->device_type = WACOM_DEVICETYPE_NONE;
690                 return;
691         }
692
693         wacom_parse_hid(hdev, features);
694 }
695
696 struct wacom_hdev_data {
697         struct list_head list;
698         struct kref kref;
699         struct hid_device *dev;
700         struct wacom_shared shared;
701 };
702
703 static LIST_HEAD(wacom_udev_list);
704 static DEFINE_MUTEX(wacom_udev_list_lock);
705
706 static bool compare_device_paths(struct hid_device *hdev_a,
707                 struct hid_device *hdev_b, char separator)
708 {
709         int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
710         int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
711
712         if (n1 != n2 || n1 <= 0 || n2 <= 0)
713                 return false;
714
715         return !strncmp(hdev_a->phys, hdev_b->phys, n1);
716 }
717
718 static bool wacom_are_sibling(struct hid_device *hdev,
719                 struct hid_device *sibling)
720 {
721         struct wacom *wacom = hid_get_drvdata(hdev);
722         struct wacom_features *features = &wacom->wacom_wac.features;
723         struct wacom *sibling_wacom = hid_get_drvdata(sibling);
724         struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
725         __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
726         __u32 oPid = features->oPid ? features->oPid : hdev->product;
727
728         /* The defined oVid/oPid must match that of the sibling */
729         if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
730                 return false;
731         if (features->oPid != HID_ANY_ID && sibling->product != oPid)
732                 return false;
733
734         /*
735          * Devices with the same VID/PID must share the same physical
736          * device path, while those with different VID/PID must share
737          * the same physical parent device path.
738          */
739         if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
740                 if (!compare_device_paths(hdev, sibling, '/'))
741                         return false;
742         } else {
743                 if (!compare_device_paths(hdev, sibling, '.'))
744                         return false;
745         }
746
747         /* Skip the remaining heuristics unless you are a HID_GENERIC device */
748         if (features->type != HID_GENERIC)
749                 return true;
750
751         /*
752          * Direct-input devices may not be siblings of indirect-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         /*
760          * Indirect-input devices may not be siblings of direct-input
761          * devices.
762          */
763         if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
764             (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
765                 return false;
766
767         /* Pen devices may only be siblings of touch devices */
768         if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
769             !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
770                 return false;
771
772         /* Touch devices may only be siblings of pen devices */
773         if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
774             !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
775                 return false;
776
777         /*
778          * No reason could be found for these two devices to NOT be
779          * siblings, so there's a good chance they ARE siblings
780          */
781         return true;
782 }
783
784 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
785 {
786         struct wacom_hdev_data *data;
787
788         /* Try to find an already-probed interface from the same device */
789         list_for_each_entry(data, &wacom_udev_list, list) {
790                 if (compare_device_paths(hdev, data->dev, '/')) {
791                         kref_get(&data->kref);
792                         return data;
793                 }
794         }
795
796         /* Fallback to finding devices that appear to be "siblings" */
797         list_for_each_entry(data, &wacom_udev_list, list) {
798                 if (wacom_are_sibling(hdev, data->dev)) {
799                         kref_get(&data->kref);
800                         return data;
801                 }
802         }
803
804         return NULL;
805 }
806
807 static void wacom_release_shared_data(struct kref *kref)
808 {
809         struct wacom_hdev_data *data =
810                 container_of(kref, struct wacom_hdev_data, kref);
811
812         mutex_lock(&wacom_udev_list_lock);
813         list_del(&data->list);
814         mutex_unlock(&wacom_udev_list_lock);
815
816         kfree(data);
817 }
818
819 static void wacom_remove_shared_data(void *res)
820 {
821         struct wacom *wacom = res;
822         struct wacom_hdev_data *data;
823         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
824
825         if (wacom_wac->shared) {
826                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
827                                     shared);
828
829                 if (wacom_wac->shared->touch == wacom->hdev)
830                         wacom_wac->shared->touch = NULL;
831                 else if (wacom_wac->shared->pen == wacom->hdev)
832                         wacom_wac->shared->pen = NULL;
833
834                 kref_put(&data->kref, wacom_release_shared_data);
835                 wacom_wac->shared = NULL;
836         }
837 }
838
839 static int wacom_add_shared_data(struct hid_device *hdev)
840 {
841         struct wacom *wacom = hid_get_drvdata(hdev);
842         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
843         struct wacom_hdev_data *data;
844         int retval = 0;
845
846         mutex_lock(&wacom_udev_list_lock);
847
848         data = wacom_get_hdev_data(hdev);
849         if (!data) {
850                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
851                 if (!data) {
852                         retval = -ENOMEM;
853                         goto out;
854                 }
855
856                 kref_init(&data->kref);
857                 data->dev = hdev;
858                 list_add_tail(&data->list, &wacom_udev_list);
859         }
860
861         wacom_wac->shared = &data->shared;
862
863         retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
864         if (retval) {
865                 mutex_unlock(&wacom_udev_list_lock);
866                 wacom_remove_shared_data(wacom);
867                 return retval;
868         }
869
870         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
871                 wacom_wac->shared->touch = hdev;
872         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
873                 wacom_wac->shared->pen = hdev;
874
875 out:
876         mutex_unlock(&wacom_udev_list_lock);
877         return retval;
878 }
879
880 static int wacom_led_control(struct wacom *wacom)
881 {
882         unsigned char *buf;
883         int retval;
884         unsigned char report_id = WAC_CMD_LED_CONTROL;
885         int buf_size = 9;
886
887         if (!wacom->led.groups)
888                 return -ENOTSUPP;
889
890         if (wacom->wacom_wac.features.type == REMOTE)
891                 return -ENOTSUPP;
892
893         if (wacom->wacom_wac.pid) { /* wireless connected */
894                 report_id = WAC_CMD_WL_LED_CONTROL;
895                 buf_size = 13;
896         }
897         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
898                 report_id = WAC_CMD_WL_INTUOSP2;
899                 buf_size = 51;
900         }
901         buf = kzalloc(buf_size, GFP_KERNEL);
902         if (!buf)
903                 return -ENOMEM;
904
905         if (wacom->wacom_wac.features.type == HID_GENERIC) {
906                 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
907                 buf[1] = wacom->led.llv;
908                 buf[2] = wacom->led.groups[0].select & 0x03;
909
910         } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
911             wacom->wacom_wac.features.type <= INTUOSPL)) {
912                 /*
913                  * Touch Ring and crop mark LED luminance may take on
914                  * one of four values:
915                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
916                  */
917                 int ring_led = wacom->led.groups[0].select & 0x03;
918                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
919                 int crop_lum = 0;
920                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
921
922                 buf[0] = report_id;
923                 if (wacom->wacom_wac.pid) {
924                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
925                                          buf, buf_size, WAC_CMD_RETRIES);
926                         buf[0] = report_id;
927                         buf[4] = led_bits;
928                 } else
929                         buf[1] = led_bits;
930         }
931         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
932                 buf[0] = report_id;
933                 buf[4] = 100; // Power Connection LED (ORANGE)
934                 buf[5] = 100; // BT Connection LED (BLUE)
935                 buf[6] = 100; // Paper Mode (RED?)
936                 buf[7] = 100; // Paper Mode (GREEN?)
937                 buf[8] = 100; // Paper Mode (BLUE?)
938                 buf[9] = wacom->led.llv;
939                 buf[10] = wacom->led.groups[0].select & 0x03;
940         }
941         else {
942                 int led = wacom->led.groups[0].select | 0x4;
943
944                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
945                     wacom->wacom_wac.features.type == WACOM_24HD)
946                         led |= (wacom->led.groups[1].select << 4) | 0x40;
947
948                 buf[0] = report_id;
949                 buf[1] = led;
950                 buf[2] = wacom->led.llv;
951                 buf[3] = wacom->led.hlv;
952                 buf[4] = wacom->led.img_lum;
953         }
954
955         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
956                                   WAC_CMD_RETRIES);
957         kfree(buf);
958
959         return retval;
960 }
961
962 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
963                 const unsigned len, const void *img)
964 {
965         unsigned char *buf;
966         int i, retval;
967         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
968
969         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
970         if (!buf)
971                 return -ENOMEM;
972
973         /* Send 'start' command */
974         buf[0] = WAC_CMD_ICON_START;
975         buf[1] = 1;
976         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
977                                   WAC_CMD_RETRIES);
978         if (retval < 0)
979                 goto out;
980
981         buf[0] = xfer_id;
982         buf[1] = button_id & 0x07;
983         for (i = 0; i < 4; i++) {
984                 buf[2] = i;
985                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
986
987                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
988                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
989                 if (retval < 0)
990                         break;
991         }
992
993         /* Send 'stop' */
994         buf[0] = WAC_CMD_ICON_START;
995         buf[1] = 0;
996         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
997                          WAC_CMD_RETRIES);
998
999 out:
1000         kfree(buf);
1001         return retval;
1002 }
1003
1004 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
1005                                       const char *buf, size_t count)
1006 {
1007         struct hid_device *hdev = to_hid_device(dev);
1008         struct wacom *wacom = hid_get_drvdata(hdev);
1009         unsigned int id;
1010         int err;
1011
1012         err = kstrtouint(buf, 10, &id);
1013         if (err)
1014                 return err;
1015
1016         mutex_lock(&wacom->lock);
1017
1018         wacom->led.groups[set_id].select = id & 0x3;
1019         err = wacom_led_control(wacom);
1020
1021         mutex_unlock(&wacom->lock);
1022
1023         return err < 0 ? err : count;
1024 }
1025
1026 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
1027 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
1028         struct device_attribute *attr, const char *buf, size_t count)   \
1029 {                                                                       \
1030         return wacom_led_select_store(dev, SET_ID, buf, count);         \
1031 }                                                                       \
1032 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
1033         struct device_attribute *attr, char *buf)                       \
1034 {                                                                       \
1035         struct hid_device *hdev = to_hid_device(dev);\
1036         struct wacom *wacom = hid_get_drvdata(hdev);                    \
1037         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
1038                          wacom->led.groups[SET_ID].select);             \
1039 }                                                                       \
1040 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
1041                     wacom_led##SET_ID##_select_show,                    \
1042                     wacom_led##SET_ID##_select_store)
1043
1044 DEVICE_LED_SELECT_ATTR(0);
1045 DEVICE_LED_SELECT_ATTR(1);
1046
1047 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
1048                                      const char *buf, size_t count)
1049 {
1050         unsigned int value;
1051         int err;
1052
1053         err = kstrtouint(buf, 10, &value);
1054         if (err)
1055                 return err;
1056
1057         mutex_lock(&wacom->lock);
1058
1059         *dest = value & 0x7f;
1060         err = wacom_led_control(wacom);
1061
1062         mutex_unlock(&wacom->lock);
1063
1064         return err < 0 ? err : count;
1065 }
1066
1067 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
1068 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
1069         struct device_attribute *attr, const char *buf, size_t count)   \
1070 {                                                                       \
1071         struct hid_device *hdev = to_hid_device(dev);\
1072         struct wacom *wacom = hid_get_drvdata(hdev);                    \
1073                                                                         \
1074         return wacom_luminance_store(wacom, &wacom->led.field,          \
1075                                      buf, count);                       \
1076 }                                                                       \
1077 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
1078         struct device_attribute *attr, char *buf)                       \
1079 {                                                                       \
1080         struct wacom *wacom = dev_get_drvdata(dev);                     \
1081         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
1082 }                                                                       \
1083 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
1084                    wacom_##name##_luminance_show,                       \
1085                    wacom_##name##_luminance_store)
1086
1087 DEVICE_LUMINANCE_ATTR(status0, llv);
1088 DEVICE_LUMINANCE_ATTR(status1, hlv);
1089 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
1090
1091 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
1092                                         const char *buf, size_t count)
1093 {
1094         struct hid_device *hdev = to_hid_device(dev);
1095         struct wacom *wacom = hid_get_drvdata(hdev);
1096         int err;
1097         unsigned len;
1098         u8 xfer_id;
1099
1100         if (hdev->bus == BUS_BLUETOOTH) {
1101                 len = 256;
1102                 xfer_id = WAC_CMD_ICON_BT_XFER;
1103         } else {
1104                 len = 1024;
1105                 xfer_id = WAC_CMD_ICON_XFER;
1106         }
1107
1108         if (count != len)
1109                 return -EINVAL;
1110
1111         mutex_lock(&wacom->lock);
1112
1113         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
1114
1115         mutex_unlock(&wacom->lock);
1116
1117         return err < 0 ? err : count;
1118 }
1119
1120 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
1121 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
1122         struct device_attribute *attr, const char *buf, size_t count)   \
1123 {                                                                       \
1124         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
1125 }                                                                       \
1126 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
1127                    NULL, wacom_btnimg##BUTTON_ID##_store)
1128
1129 DEVICE_BTNIMG_ATTR(0);
1130 DEVICE_BTNIMG_ATTR(1);
1131 DEVICE_BTNIMG_ATTR(2);
1132 DEVICE_BTNIMG_ATTR(3);
1133 DEVICE_BTNIMG_ATTR(4);
1134 DEVICE_BTNIMG_ATTR(5);
1135 DEVICE_BTNIMG_ATTR(6);
1136 DEVICE_BTNIMG_ATTR(7);
1137
1138 static struct attribute *cintiq_led_attrs[] = {
1139         &dev_attr_status_led0_select.attr,
1140         &dev_attr_status_led1_select.attr,
1141         NULL
1142 };
1143
1144 static struct attribute_group cintiq_led_attr_group = {
1145         .name = "wacom_led",
1146         .attrs = cintiq_led_attrs,
1147 };
1148
1149 static struct attribute *intuos4_led_attrs[] = {
1150         &dev_attr_status0_luminance.attr,
1151         &dev_attr_status1_luminance.attr,
1152         &dev_attr_status_led0_select.attr,
1153         &dev_attr_buttons_luminance.attr,
1154         &dev_attr_button0_rawimg.attr,
1155         &dev_attr_button1_rawimg.attr,
1156         &dev_attr_button2_rawimg.attr,
1157         &dev_attr_button3_rawimg.attr,
1158         &dev_attr_button4_rawimg.attr,
1159         &dev_attr_button5_rawimg.attr,
1160         &dev_attr_button6_rawimg.attr,
1161         &dev_attr_button7_rawimg.attr,
1162         NULL
1163 };
1164
1165 static struct attribute_group intuos4_led_attr_group = {
1166         .name = "wacom_led",
1167         .attrs = intuos4_led_attrs,
1168 };
1169
1170 static struct attribute *intuos5_led_attrs[] = {
1171         &dev_attr_status0_luminance.attr,
1172         &dev_attr_status_led0_select.attr,
1173         NULL
1174 };
1175
1176 static struct attribute_group intuos5_led_attr_group = {
1177         .name = "wacom_led",
1178         .attrs = intuos5_led_attrs,
1179 };
1180
1181 static struct attribute *generic_led_attrs[] = {
1182         &dev_attr_status0_luminance.attr,
1183         &dev_attr_status_led0_select.attr,
1184         NULL
1185 };
1186
1187 static struct attribute_group generic_led_attr_group = {
1188         .name = "wacom_led",
1189         .attrs = generic_led_attrs,
1190 };
1191
1192 struct wacom_sysfs_group_devres {
1193         struct attribute_group *group;
1194         struct kobject *root;
1195 };
1196
1197 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1198 {
1199         struct wacom_sysfs_group_devres *devres = res;
1200         struct kobject *kobj = devres->root;
1201
1202         dev_dbg(dev, "%s: dropping reference to %s\n",
1203                 __func__, devres->group->name);
1204         sysfs_remove_group(kobj, devres->group);
1205 }
1206
1207 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1208                                            struct kobject *root,
1209                                            struct attribute_group *group)
1210 {
1211         struct wacom_sysfs_group_devres *devres;
1212         int error;
1213
1214         devres = devres_alloc(wacom_devm_sysfs_group_release,
1215                               sizeof(struct wacom_sysfs_group_devres),
1216                               GFP_KERNEL);
1217         if (!devres)
1218                 return -ENOMEM;
1219
1220         devres->group = group;
1221         devres->root = root;
1222
1223         error = sysfs_create_group(devres->root, group);
1224         if (error) {
1225                 devres_free(devres);
1226                 return error;
1227         }
1228
1229         devres_add(&wacom->hdev->dev, devres);
1230
1231         return 0;
1232 }
1233
1234 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1235                                          struct attribute_group *group)
1236 {
1237         return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1238                                                group);
1239 }
1240
1241 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1242 {
1243         struct wacom *wacom = led->wacom;
1244
1245         if (wacom->led.max_hlv)
1246                 return led->hlv * LED_FULL / wacom->led.max_hlv;
1247
1248         if (wacom->led.max_llv)
1249                 return led->llv * LED_FULL / wacom->led.max_llv;
1250
1251         /* device doesn't support brightness tuning */
1252         return LED_FULL;
1253 }
1254
1255 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1256 {
1257         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1258         struct wacom *wacom = led->wacom;
1259
1260         if (wacom->led.groups[led->group].select != led->id)
1261                 return LED_OFF;
1262
1263         return wacom_leds_brightness_get(led);
1264 }
1265
1266 static int wacom_led_brightness_set(struct led_classdev *cdev,
1267                                     enum led_brightness brightness)
1268 {
1269         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1270         struct wacom *wacom = led->wacom;
1271         int error;
1272
1273         mutex_lock(&wacom->lock);
1274
1275         if (!wacom->led.groups || (brightness == LED_OFF &&
1276             wacom->led.groups[led->group].select != led->id)) {
1277                 error = 0;
1278                 goto out;
1279         }
1280
1281         led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1282         led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1283
1284         wacom->led.groups[led->group].select = led->id;
1285
1286         error = wacom_led_control(wacom);
1287
1288 out:
1289         mutex_unlock(&wacom->lock);
1290
1291         return error;
1292 }
1293
1294 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1295                                                enum led_brightness brightness)
1296 {
1297 }
1298
1299 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1300                                   struct wacom_led *led, unsigned int group,
1301                                   unsigned int id, bool read_only)
1302 {
1303         int error;
1304         char *name;
1305
1306         name = devm_kasprintf(dev, GFP_KERNEL,
1307                               "%s::wacom-%d.%d",
1308                               dev_name(dev),
1309                               group,
1310                               id);
1311         if (!name)
1312                 return -ENOMEM;
1313
1314         if (!read_only) {
1315                 led->trigger.name = name;
1316                 error = devm_led_trigger_register(dev, &led->trigger);
1317                 if (error) {
1318                         hid_err(wacom->hdev,
1319                                 "failed to register LED trigger %s: %d\n",
1320                                 led->cdev.name, error);
1321                         return error;
1322                 }
1323         }
1324
1325         led->group = group;
1326         led->id = id;
1327         led->wacom = wacom;
1328         led->llv = wacom->led.llv;
1329         led->hlv = wacom->led.hlv;
1330         led->cdev.name = name;
1331         led->cdev.max_brightness = LED_FULL;
1332         led->cdev.flags = LED_HW_PLUGGABLE;
1333         led->cdev.brightness_get = __wacom_led_brightness_get;
1334         if (!read_only) {
1335                 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1336                 led->cdev.default_trigger = led->cdev.name;
1337         } else {
1338                 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1339         }
1340
1341         error = devm_led_classdev_register(dev, &led->cdev);
1342         if (error) {
1343                 hid_err(wacom->hdev,
1344                         "failed to register LED %s: %d\n",
1345                         led->cdev.name, error);
1346                 led->cdev.name = NULL;
1347                 return error;
1348         }
1349
1350         return 0;
1351 }
1352
1353 static void wacom_led_groups_release_one(void *data)
1354 {
1355         struct wacom_group_leds *group = data;
1356
1357         devres_release_group(group->dev, group);
1358 }
1359
1360 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1361                                                    struct wacom *wacom,
1362                                                    int group_id, int count,
1363                                                    bool read_only)
1364 {
1365         struct wacom_led *leds;
1366         int i, error;
1367
1368         if (group_id >= wacom->led.count || count <= 0)
1369                 return -EINVAL;
1370
1371         if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1372                 return -ENOMEM;
1373
1374         leds = devm_kcalloc(dev, count, sizeof(struct wacom_led), GFP_KERNEL);
1375         if (!leds) {
1376                 error = -ENOMEM;
1377                 goto err;
1378         }
1379
1380         wacom->led.groups[group_id].leds = leds;
1381         wacom->led.groups[group_id].count = count;
1382
1383         for (i = 0; i < count; i++) {
1384                 error = wacom_led_register_one(dev, wacom, &leds[i],
1385                                                group_id, i, read_only);
1386                 if (error)
1387                         goto err;
1388         }
1389
1390         wacom->led.groups[group_id].dev = dev;
1391
1392         devres_close_group(dev, &wacom->led.groups[group_id]);
1393
1394         /*
1395          * There is a bug (?) in devm_led_classdev_register() in which its
1396          * increments the refcount of the parent. If the parent is an input
1397          * device, that means the ref count never reaches 0 when
1398          * devm_input_device_release() gets called.
1399          * This means that the LEDs are still there after disconnect.
1400          * Manually force the release of the group so that the leds are released
1401          * once we are done using them.
1402          */
1403         error = devm_add_action_or_reset(&wacom->hdev->dev,
1404                                          wacom_led_groups_release_one,
1405                                          &wacom->led.groups[group_id]);
1406         if (error)
1407                 return error;
1408
1409         return 0;
1410
1411 err:
1412         devres_release_group(dev, &wacom->led.groups[group_id]);
1413         return error;
1414 }
1415
1416 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1417                                  unsigned int id)
1418 {
1419         struct wacom_group_leds *group;
1420
1421         if (group_id >= wacom->led.count)
1422                 return NULL;
1423
1424         group = &wacom->led.groups[group_id];
1425
1426         if (!group->leds)
1427                 return NULL;
1428
1429         id %= group->count;
1430
1431         return &group->leds[id];
1432 }
1433
1434 /**
1435  * wacom_led_next: gives the next available led with a wacom trigger.
1436  *
1437  * returns the next available struct wacom_led which has its default trigger
1438  * or the current one if none is available.
1439  */
1440 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1441 {
1442         struct wacom_led *next_led;
1443         int group, next;
1444
1445         if (!wacom || !cur)
1446                 return NULL;
1447
1448         group = cur->group;
1449         next = cur->id;
1450
1451         do {
1452                 next_led = wacom_led_find(wacom, group, ++next);
1453                 if (!next_led || next_led == cur)
1454                         return next_led;
1455         } while (next_led->cdev.trigger != &next_led->trigger);
1456
1457         return next_led;
1458 }
1459
1460 static void wacom_led_groups_release(void *data)
1461 {
1462         struct wacom *wacom = data;
1463
1464         wacom->led.groups = NULL;
1465         wacom->led.count = 0;
1466 }
1467
1468 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1469 {
1470         struct device *dev = &wacom->hdev->dev;
1471         struct wacom_group_leds *groups;
1472         int error;
1473
1474         groups = devm_kcalloc(dev, count, sizeof(struct wacom_group_leds),
1475                               GFP_KERNEL);
1476         if (!groups)
1477                 return -ENOMEM;
1478
1479         error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1480         if (error)
1481                 return error;
1482
1483         wacom->led.groups = groups;
1484         wacom->led.count = count;
1485
1486         return 0;
1487 }
1488
1489 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1490                                          int led_per_group, bool read_only)
1491 {
1492         struct device *dev;
1493         int i, error;
1494
1495         if (!wacom->wacom_wac.pad_input)
1496                 return -EINVAL;
1497
1498         dev = &wacom->wacom_wac.pad_input->dev;
1499
1500         error = wacom_led_groups_allocate(wacom, group_count);
1501         if (error)
1502                 return error;
1503
1504         for (i = 0; i < group_count; i++) {
1505                 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1506                                                                 led_per_group,
1507                                                                 read_only);
1508                 if (error)
1509                         return error;
1510         }
1511
1512         return 0;
1513 }
1514
1515 int wacom_initialize_leds(struct wacom *wacom)
1516 {
1517         int error;
1518
1519         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1520                 return 0;
1521
1522         /* Initialize default values */
1523         switch (wacom->wacom_wac.features.type) {
1524         case HID_GENERIC:
1525                 if (!wacom->generic_has_leds)
1526                         return 0;
1527                 wacom->led.llv = 100;
1528                 wacom->led.max_llv = 100;
1529
1530                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1531                 if (error) {
1532                         hid_err(wacom->hdev,
1533                                 "cannot create leds err: %d\n", error);
1534                         return error;
1535                 }
1536
1537                 error = wacom_devm_sysfs_create_group(wacom,
1538                                                       &generic_led_attr_group);
1539                 break;
1540
1541         case INTUOS4S:
1542         case INTUOS4:
1543         case INTUOS4WL:
1544         case INTUOS4L:
1545                 wacom->led.llv = 10;
1546                 wacom->led.hlv = 20;
1547                 wacom->led.max_llv = 127;
1548                 wacom->led.max_hlv = 127;
1549                 wacom->led.img_lum = 10;
1550
1551                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1552                 if (error) {
1553                         hid_err(wacom->hdev,
1554                                 "cannot create leds err: %d\n", error);
1555                         return error;
1556                 }
1557
1558                 error = wacom_devm_sysfs_create_group(wacom,
1559                                                       &intuos4_led_attr_group);
1560                 break;
1561
1562         case WACOM_24HD:
1563         case WACOM_21UX2:
1564                 wacom->led.llv = 0;
1565                 wacom->led.hlv = 0;
1566                 wacom->led.img_lum = 0;
1567
1568                 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1569                 if (error) {
1570                         hid_err(wacom->hdev,
1571                                 "cannot create leds err: %d\n", error);
1572                         return error;
1573                 }
1574
1575                 error = wacom_devm_sysfs_create_group(wacom,
1576                                                       &cintiq_led_attr_group);
1577                 break;
1578
1579         case INTUOS5S:
1580         case INTUOS5:
1581         case INTUOS5L:
1582         case INTUOSPS:
1583         case INTUOSPM:
1584         case INTUOSPL:
1585                 wacom->led.llv = 32;
1586                 wacom->led.max_llv = 96;
1587
1588                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1589                 if (error) {
1590                         hid_err(wacom->hdev,
1591                                 "cannot create leds err: %d\n", error);
1592                         return error;
1593                 }
1594
1595                 error = wacom_devm_sysfs_create_group(wacom,
1596                                                       &intuos5_led_attr_group);
1597                 break;
1598
1599         case INTUOSP2_BT:
1600                 wacom->led.llv = 50;
1601                 wacom->led.max_llv = 100;
1602                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1603                 if (error) {
1604                         hid_err(wacom->hdev,
1605                                 "cannot create leds err: %d\n", error);
1606                         return error;
1607                 }
1608                 return 0;
1609
1610         case REMOTE:
1611                 wacom->led.llv = 255;
1612                 wacom->led.max_llv = 255;
1613                 error = wacom_led_groups_allocate(wacom, 5);
1614                 if (error) {
1615                         hid_err(wacom->hdev,
1616                                 "cannot create leds err: %d\n", error);
1617                         return error;
1618                 }
1619                 return 0;
1620
1621         default:
1622                 return 0;
1623         }
1624
1625         if (error) {
1626                 hid_err(wacom->hdev,
1627                         "cannot create sysfs group err: %d\n", error);
1628                 return error;
1629         }
1630
1631         return 0;
1632 }
1633
1634 static void wacom_init_work(struct work_struct *work)
1635 {
1636         struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1637
1638         _wacom_query_tablet_data(wacom);
1639         wacom_led_control(wacom);
1640 }
1641
1642 static void wacom_query_tablet_data(struct wacom *wacom)
1643 {
1644         schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1645 }
1646
1647 static enum power_supply_property wacom_battery_props[] = {
1648         POWER_SUPPLY_PROP_MODEL_NAME,
1649         POWER_SUPPLY_PROP_PRESENT,
1650         POWER_SUPPLY_PROP_STATUS,
1651         POWER_SUPPLY_PROP_SCOPE,
1652         POWER_SUPPLY_PROP_CAPACITY
1653 };
1654
1655 static int wacom_battery_get_property(struct power_supply *psy,
1656                                       enum power_supply_property psp,
1657                                       union power_supply_propval *val)
1658 {
1659         struct wacom_battery *battery = power_supply_get_drvdata(psy);
1660         int ret = 0;
1661
1662         switch (psp) {
1663                 case POWER_SUPPLY_PROP_MODEL_NAME:
1664                         val->strval = battery->wacom->wacom_wac.name;
1665                         break;
1666                 case POWER_SUPPLY_PROP_PRESENT:
1667                         val->intval = battery->bat_connected;
1668                         break;
1669                 case POWER_SUPPLY_PROP_SCOPE:
1670                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1671                         break;
1672                 case POWER_SUPPLY_PROP_CAPACITY:
1673                         val->intval = battery->battery_capacity;
1674                         break;
1675                 case POWER_SUPPLY_PROP_STATUS:
1676                         if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
1677                                 val->intval = battery->bat_status;
1678                         else if (battery->bat_charging)
1679                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1680                         else if (battery->battery_capacity == 100 &&
1681                                     battery->ps_connected)
1682                                 val->intval = POWER_SUPPLY_STATUS_FULL;
1683                         else if (battery->ps_connected)
1684                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1685                         else
1686                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1687                         break;
1688                 default:
1689                         ret = -EINVAL;
1690                         break;
1691         }
1692
1693         return ret;
1694 }
1695
1696 static int __wacom_initialize_battery(struct wacom *wacom,
1697                                       struct wacom_battery *battery)
1698 {
1699         static atomic_t battery_no = ATOMIC_INIT(0);
1700         struct device *dev = &wacom->hdev->dev;
1701         struct power_supply_config psy_cfg = { .drv_data = battery, };
1702         struct power_supply *ps_bat;
1703         struct power_supply_desc *bat_desc = &battery->bat_desc;
1704         unsigned long n;
1705         int error;
1706
1707         if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1708                 return -ENOMEM;
1709
1710         battery->wacom = wacom;
1711
1712         n = atomic_inc_return(&battery_no) - 1;
1713
1714         bat_desc->properties = wacom_battery_props;
1715         bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1716         bat_desc->get_property = wacom_battery_get_property;
1717         sprintf(battery->bat_name, "wacom_battery_%ld", n);
1718         bat_desc->name = battery->bat_name;
1719         bat_desc->type = POWER_SUPPLY_TYPE_USB;
1720         bat_desc->use_for_apm = 0;
1721
1722         ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1723         if (IS_ERR(ps_bat)) {
1724                 error = PTR_ERR(ps_bat);
1725                 goto err;
1726         }
1727
1728         power_supply_powers(ps_bat, &wacom->hdev->dev);
1729
1730         battery->battery = ps_bat;
1731
1732         devres_close_group(dev, bat_desc);
1733         return 0;
1734
1735 err:
1736         devres_release_group(dev, bat_desc);
1737         return error;
1738 }
1739
1740 static int wacom_initialize_battery(struct wacom *wacom)
1741 {
1742         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1743                 return __wacom_initialize_battery(wacom, &wacom->battery);
1744
1745         return 0;
1746 }
1747
1748 static void wacom_destroy_battery(struct wacom *wacom)
1749 {
1750         if (wacom->battery.battery) {
1751                 devres_release_group(&wacom->hdev->dev,
1752                                      &wacom->battery.bat_desc);
1753                 wacom->battery.battery = NULL;
1754         }
1755 }
1756
1757 static ssize_t wacom_show_speed(struct device *dev,
1758                                 struct device_attribute
1759                                 *attr, char *buf)
1760 {
1761         struct hid_device *hdev = to_hid_device(dev);
1762         struct wacom *wacom = hid_get_drvdata(hdev);
1763
1764         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1765 }
1766
1767 static ssize_t wacom_store_speed(struct device *dev,
1768                                 struct device_attribute *attr,
1769                                 const char *buf, size_t count)
1770 {
1771         struct hid_device *hdev = to_hid_device(dev);
1772         struct wacom *wacom = hid_get_drvdata(hdev);
1773         u8 new_speed;
1774
1775         if (kstrtou8(buf, 0, &new_speed))
1776                 return -EINVAL;
1777
1778         if (new_speed != 0 && new_speed != 1)
1779                 return -EINVAL;
1780
1781         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1782
1783         return count;
1784 }
1785
1786 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1787                 wacom_show_speed, wacom_store_speed);
1788
1789
1790 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1791                                       struct kobj_attribute *kattr,
1792                                       char *buf, int index)
1793 {
1794         struct device *dev = kobj_to_dev(kobj->parent);
1795         struct hid_device *hdev = to_hid_device(dev);
1796         struct wacom *wacom = hid_get_drvdata(hdev);
1797         u8 mode;
1798
1799         mode = wacom->led.groups[index].select;
1800         return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
1801 }
1802
1803 #define DEVICE_EKR_ATTR_GROUP(SET_ID)                                   \
1804 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,   \
1805                                struct kobj_attribute *kattr, char *buf) \
1806 {                                                                       \
1807         return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);        \
1808 }                                                                       \
1809 static struct kobj_attribute remote##SET_ID##_mode_attr = {             \
1810         .attr = {.name = "remote_mode",                                 \
1811                 .mode = DEV_ATTR_RO_PERM},                              \
1812         .show = wacom_show_remote##SET_ID##_mode,                       \
1813 };                                                                      \
1814 static struct attribute *remote##SET_ID##_serial_attrs[] = {            \
1815         &remote##SET_ID##_mode_attr.attr,                               \
1816         NULL                                                            \
1817 };                                                                      \
1818 static struct attribute_group remote##SET_ID##_serial_group = {         \
1819         .name = NULL,                                                   \
1820         .attrs = remote##SET_ID##_serial_attrs,                         \
1821 }
1822
1823 DEVICE_EKR_ATTR_GROUP(0);
1824 DEVICE_EKR_ATTR_GROUP(1);
1825 DEVICE_EKR_ATTR_GROUP(2);
1826 DEVICE_EKR_ATTR_GROUP(3);
1827 DEVICE_EKR_ATTR_GROUP(4);
1828
1829 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1830                                           int index)
1831 {
1832         int error = 0;
1833         struct wacom_remote *remote = wacom->remote;
1834
1835         remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1836                                                           GFP_KERNEL,
1837                                                           "%d", serial);
1838         if (!remote->remotes[index].group.name)
1839                 return -ENOMEM;
1840
1841         error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1842                                                 &remote->remotes[index].group);
1843         if (error) {
1844                 remote->remotes[index].group.name = NULL;
1845                 hid_err(wacom->hdev,
1846                         "cannot create sysfs group err: %d\n", error);
1847                 return error;
1848         }
1849
1850         return 0;
1851 }
1852
1853 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1854 {
1855         const size_t buf_size = 2;
1856         unsigned char *buf;
1857         int retval;
1858
1859         buf = kzalloc(buf_size, GFP_KERNEL);
1860         if (!buf)
1861                 return -ENOMEM;
1862
1863         buf[0] = WAC_CMD_DELETE_PAIRING;
1864         buf[1] = selector;
1865
1866         retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1867                                   buf_size, WAC_CMD_RETRIES);
1868         kfree(buf);
1869
1870         return retval;
1871 }
1872
1873 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1874                                          struct kobj_attribute *attr,
1875                                          const char *buf, size_t count)
1876 {
1877         unsigned char selector = 0;
1878         struct device *dev = kobj_to_dev(kobj->parent);
1879         struct hid_device *hdev = to_hid_device(dev);
1880         struct wacom *wacom = hid_get_drvdata(hdev);
1881         int err;
1882
1883         if (!strncmp(buf, "*\n", 2)) {
1884                 selector = WAC_CMD_UNPAIR_ALL;
1885         } else {
1886                 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1887                          buf);
1888                 return -1;
1889         }
1890
1891         mutex_lock(&wacom->lock);
1892
1893         err = wacom_cmd_unpair_remote(wacom, selector);
1894         mutex_unlock(&wacom->lock);
1895
1896         return err < 0 ? err : count;
1897 }
1898
1899 static struct kobj_attribute unpair_remote_attr = {
1900         .attr = {.name = "unpair_remote", .mode = 0200},
1901         .store = wacom_store_unpair_remote,
1902 };
1903
1904 static const struct attribute *remote_unpair_attrs[] = {
1905         &unpair_remote_attr.attr,
1906         NULL
1907 };
1908
1909 static void wacom_remotes_destroy(void *data)
1910 {
1911         struct wacom *wacom = data;
1912         struct wacom_remote *remote = wacom->remote;
1913
1914         if (!remote)
1915                 return;
1916
1917         kobject_put(remote->remote_dir);
1918         kfifo_free(&remote->remote_fifo);
1919         wacom->remote = NULL;
1920 }
1921
1922 static int wacom_initialize_remotes(struct wacom *wacom)
1923 {
1924         int error = 0;
1925         struct wacom_remote *remote;
1926         int i;
1927
1928         if (wacom->wacom_wac.features.type != REMOTE)
1929                 return 0;
1930
1931         remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1932                               GFP_KERNEL);
1933         if (!remote)
1934                 return -ENOMEM;
1935
1936         wacom->remote = remote;
1937
1938         spin_lock_init(&remote->remote_lock);
1939
1940         error = kfifo_alloc(&remote->remote_fifo,
1941                         5 * sizeof(struct wacom_remote_data),
1942                         GFP_KERNEL);
1943         if (error) {
1944                 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1945                 return -ENOMEM;
1946         }
1947
1948         remote->remotes[0].group = remote0_serial_group;
1949         remote->remotes[1].group = remote1_serial_group;
1950         remote->remotes[2].group = remote2_serial_group;
1951         remote->remotes[3].group = remote3_serial_group;
1952         remote->remotes[4].group = remote4_serial_group;
1953
1954         remote->remote_dir = kobject_create_and_add("wacom_remote",
1955                                                     &wacom->hdev->dev.kobj);
1956         if (!remote->remote_dir)
1957                 return -ENOMEM;
1958
1959         error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1960
1961         if (error) {
1962                 hid_err(wacom->hdev,
1963                         "cannot create sysfs group err: %d\n", error);
1964                 return error;
1965         }
1966
1967         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1968                 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1969                 remote->remotes[i].serial = 0;
1970         }
1971
1972         error = devm_add_action_or_reset(&wacom->hdev->dev,
1973                                          wacom_remotes_destroy, wacom);
1974         if (error)
1975                 return error;
1976
1977         return 0;
1978 }
1979
1980 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1981 {
1982         struct input_dev *input_dev;
1983         struct hid_device *hdev = wacom->hdev;
1984         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1985
1986         input_dev = devm_input_allocate_device(&hdev->dev);
1987         if (!input_dev)
1988                 return NULL;
1989
1990         input_dev->name = wacom_wac->features.name;
1991         input_dev->phys = hdev->phys;
1992         input_dev->dev.parent = &hdev->dev;
1993         input_dev->open = wacom_open;
1994         input_dev->close = wacom_close;
1995         input_dev->uniq = hdev->uniq;
1996         input_dev->id.bustype = hdev->bus;
1997         input_dev->id.vendor  = hdev->vendor;
1998         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1999         input_dev->id.version = hdev->version;
2000         input_set_drvdata(input_dev, wacom);
2001
2002         return input_dev;
2003 }
2004
2005 static int wacom_allocate_inputs(struct wacom *wacom)
2006 {
2007         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2008
2009         wacom_wac->pen_input = wacom_allocate_input(wacom);
2010         wacom_wac->touch_input = wacom_allocate_input(wacom);
2011         wacom_wac->pad_input = wacom_allocate_input(wacom);
2012         if (!wacom_wac->pen_input ||
2013             !wacom_wac->touch_input ||
2014             !wacom_wac->pad_input)
2015                 return -ENOMEM;
2016
2017         wacom_wac->pen_input->name = wacom_wac->pen_name;
2018         wacom_wac->touch_input->name = wacom_wac->touch_name;
2019         wacom_wac->pad_input->name = wacom_wac->pad_name;
2020
2021         return 0;
2022 }
2023
2024 static int wacom_register_inputs(struct wacom *wacom)
2025 {
2026         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
2027         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2028         int error = 0;
2029
2030         pen_input_dev = wacom_wac->pen_input;
2031         touch_input_dev = wacom_wac->touch_input;
2032         pad_input_dev = wacom_wac->pad_input;
2033
2034         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
2035                 return -EINVAL;
2036
2037         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
2038         if (error) {
2039                 /* no pen in use on this interface */
2040                 input_free_device(pen_input_dev);
2041                 wacom_wac->pen_input = NULL;
2042                 pen_input_dev = NULL;
2043         } else {
2044                 error = input_register_device(pen_input_dev);
2045                 if (error)
2046                         goto fail;
2047         }
2048
2049         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
2050         if (error) {
2051                 /* no touch in use on this interface */
2052                 input_free_device(touch_input_dev);
2053                 wacom_wac->touch_input = NULL;
2054                 touch_input_dev = NULL;
2055         } else {
2056                 error = input_register_device(touch_input_dev);
2057                 if (error)
2058                         goto fail;
2059         }
2060
2061         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
2062         if (error) {
2063                 /* no pad in use on this interface */
2064                 input_free_device(pad_input_dev);
2065                 wacom_wac->pad_input = NULL;
2066                 pad_input_dev = NULL;
2067         } else {
2068                 error = input_register_device(pad_input_dev);
2069                 if (error)
2070                         goto fail;
2071         }
2072
2073         return 0;
2074
2075 fail:
2076         wacom_wac->pad_input = NULL;
2077         wacom_wac->touch_input = NULL;
2078         wacom_wac->pen_input = NULL;
2079         return error;
2080 }
2081
2082 /*
2083  * Not all devices report physical dimensions from HID.
2084  * Compute the default from hardcoded logical dimension
2085  * and resolution before driver overwrites them.
2086  */
2087 static void wacom_set_default_phy(struct wacom_features *features)
2088 {
2089         if (features->x_resolution) {
2090                 features->x_phy = (features->x_max * 100) /
2091                                         features->x_resolution;
2092                 features->y_phy = (features->y_max * 100) /
2093                                         features->y_resolution;
2094         }
2095 }
2096
2097 static void wacom_calculate_res(struct wacom_features *features)
2098 {
2099         /* set unit to "100th of a mm" for devices not reported by HID */
2100         if (!features->unit) {
2101                 features->unit = 0x11;
2102                 features->unitExpo = -3;
2103         }
2104
2105         features->x_resolution = wacom_calc_hid_res(features->x_max,
2106                                                     features->x_phy,
2107                                                     features->unit,
2108                                                     features->unitExpo);
2109         features->y_resolution = wacom_calc_hid_res(features->y_max,
2110                                                     features->y_phy,
2111                                                     features->unit,
2112                                                     features->unitExpo);
2113 }
2114
2115 void wacom_battery_work(struct work_struct *work)
2116 {
2117         struct wacom *wacom = container_of(work, struct wacom, battery_work);
2118
2119         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2120              !wacom->battery.battery) {
2121                 wacom_initialize_battery(wacom);
2122         }
2123         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2124                  wacom->battery.battery) {
2125                 wacom_destroy_battery(wacom);
2126         }
2127 }
2128
2129 static size_t wacom_compute_pktlen(struct hid_device *hdev)
2130 {
2131         struct hid_report_enum *report_enum;
2132         struct hid_report *report;
2133         size_t size = 0;
2134
2135         report_enum = hdev->report_enum + HID_INPUT_REPORT;
2136
2137         list_for_each_entry(report, &report_enum->report_list, list) {
2138                 size_t report_size = hid_report_len(report);
2139                 if (report_size > size)
2140                         size = report_size;
2141         }
2142
2143         return size;
2144 }
2145
2146 static void wacom_update_name(struct wacom *wacom, const char *suffix)
2147 {
2148         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2149         struct wacom_features *features = &wacom_wac->features;
2150         char name[WACOM_NAME_MAX];
2151
2152         /* Generic devices name unspecified */
2153         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2154                 char *product_name = wacom->hdev->name;
2155
2156                 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
2157                         struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
2158                         struct usb_device *dev = interface_to_usbdev(intf);
2159                         product_name = dev->product;
2160                 }
2161
2162                 if (wacom->hdev->bus == BUS_I2C) {
2163                         snprintf(name, sizeof(name), "%s %X",
2164                                  features->name, wacom->hdev->product);
2165                 } else if (strstr(product_name, "Wacom") ||
2166                            strstr(product_name, "wacom") ||
2167                            strstr(product_name, "WACOM")) {
2168                         strlcpy(name, product_name, sizeof(name));
2169                 } else {
2170                         snprintf(name, sizeof(name), "Wacom %s", product_name);
2171                 }
2172
2173                 /* strip out excess whitespaces */
2174                 while (1) {
2175                         char *gap = strstr(name, "  ");
2176                         if (gap == NULL)
2177                                 break;
2178                         /* shift everything including the terminator */
2179                         memmove(gap, gap+1, strlen(gap));
2180                 }
2181
2182                 /* get rid of trailing whitespace */
2183                 if (name[strlen(name)-1] == ' ')
2184                         name[strlen(name)-1] = '\0';
2185         } else {
2186                 strlcpy(name, features->name, sizeof(name));
2187         }
2188
2189         snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2190                  name, suffix);
2191
2192         /* Append the device type to the name */
2193         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
2194                 "%s%s Pen", name, suffix);
2195         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
2196                 "%s%s Finger", name, suffix);
2197         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
2198                 "%s%s Pad", name, suffix);
2199 }
2200
2201 static void wacom_release_resources(struct wacom *wacom)
2202 {
2203         struct hid_device *hdev = wacom->hdev;
2204
2205         if (!wacom->resources)
2206                 return;
2207
2208         devres_release_group(&hdev->dev, wacom);
2209
2210         wacom->resources = false;
2211
2212         wacom->wacom_wac.pen_input = NULL;
2213         wacom->wacom_wac.touch_input = NULL;
2214         wacom->wacom_wac.pad_input = NULL;
2215 }
2216
2217 static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
2218 {
2219         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
2220                 wacom_wac->shared->type = wacom_wac->features.type;
2221                 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2222         }
2223
2224         if (wacom_wac->has_mute_touch_switch) {
2225                 wacom_wac->shared->has_mute_touch_switch = true;
2226                 wacom_wac->shared->is_touch_on = true;
2227         }
2228
2229         if (wacom_wac->shared->has_mute_touch_switch &&
2230             wacom_wac->shared->touch_input) {
2231                 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
2232                 input_set_capability(wacom_wac->shared->touch_input, EV_SW,
2233                                      SW_MUTE_DEVICE);
2234         }
2235 }
2236
2237 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2238 {
2239         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2240         struct wacom_features *features = &wacom_wac->features;
2241         struct hid_device *hdev = wacom->hdev;
2242         int error;
2243         unsigned int connect_mask = HID_CONNECT_HIDRAW;
2244
2245         features->pktlen = wacom_compute_pktlen(hdev);
2246         if (features->pktlen > WACOM_PKGLEN_MAX)
2247                 return -EINVAL;
2248
2249         if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2250                 return -ENOMEM;
2251
2252         wacom->resources = true;
2253
2254         error = wacom_allocate_inputs(wacom);
2255         if (error)
2256                 goto fail;
2257
2258         /*
2259          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2260          * into debug mode for the touch part.
2261          * We ignore the other interfaces.
2262          */
2263         if (features->type == BAMBOO_PAD) {
2264                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2265                         features->type = HID_GENERIC;
2266                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2267                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2268                         error = -ENODEV;
2269                         goto fail;
2270                 }
2271         }
2272
2273         /* set the default size in case we do not get them from hid */
2274         wacom_set_default_phy(features);
2275
2276         /* Retrieve the physical and logical size for touch devices */
2277         wacom_retrieve_hid_descriptor(hdev, features);
2278         wacom_setup_device_quirks(wacom);
2279
2280         if (features->device_type == WACOM_DEVICETYPE_NONE &&
2281             features->type != WIRELESS) {
2282                 error = features->type == HID_GENERIC ? -ENODEV : 0;
2283
2284                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2285                          hdev->name,
2286                          error ? "Ignoring" : "Assuming pen");
2287
2288                 if (error)
2289                         goto fail;
2290
2291                 features->device_type |= WACOM_DEVICETYPE_PEN;
2292         }
2293
2294         wacom_calculate_res(features);
2295
2296         wacom_update_name(wacom, wireless ? " (WL)" : "");
2297
2298         /* pen only Bamboo neither support touch nor pad */
2299         if ((features->type == BAMBOO_PEN) &&
2300             ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2301             (features->device_type & WACOM_DEVICETYPE_PAD))) {
2302                 error = -ENODEV;
2303                 goto fail;
2304         }
2305
2306         error = wacom_add_shared_data(hdev);
2307         if (error)
2308                 goto fail;
2309
2310         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2311              (features->quirks & WACOM_QUIRK_BATTERY)) {
2312                 error = wacom_initialize_battery(wacom);
2313                 if (error)
2314                         goto fail;
2315         }
2316
2317         error = wacom_register_inputs(wacom);
2318         if (error)
2319                 goto fail;
2320
2321         if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2322                 error = wacom_initialize_leds(wacom);
2323                 if (error)
2324                         goto fail;
2325
2326                 error = wacom_initialize_remotes(wacom);
2327                 if (error)
2328                         goto fail;
2329         }
2330
2331         if (features->type == HID_GENERIC)
2332                 connect_mask |= HID_CONNECT_DRIVER;
2333
2334         /* Regular HID work starts now */
2335         error = hid_hw_start(hdev, connect_mask);
2336         if (error) {
2337                 hid_err(hdev, "hw start failed\n");
2338                 goto fail;
2339         }
2340
2341         if (!wireless) {
2342                 /* Note that if query fails it is not a hard failure */
2343                 wacom_query_tablet_data(wacom);
2344         }
2345
2346         /* touch only Bamboo doesn't support pen */
2347         if ((features->type == BAMBOO_TOUCH) &&
2348             (features->device_type & WACOM_DEVICETYPE_PEN)) {
2349                 cancel_delayed_work_sync(&wacom->init_work);
2350                 _wacom_query_tablet_data(wacom);
2351                 error = -ENODEV;
2352                 goto fail_quirks;
2353         }
2354
2355         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2356                 error = hid_hw_open(hdev);
2357
2358         wacom_set_shared_values(wacom_wac);
2359         devres_close_group(&hdev->dev, wacom);
2360
2361         return 0;
2362
2363 fail_quirks:
2364         hid_hw_stop(hdev);
2365 fail:
2366         wacom_release_resources(wacom);
2367         return error;
2368 }
2369
2370 static void wacom_wireless_work(struct work_struct *work)
2371 {
2372         struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2373         struct usb_device *usbdev = wacom->usbdev;
2374         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2375         struct hid_device *hdev1, *hdev2;
2376         struct wacom *wacom1, *wacom2;
2377         struct wacom_wac *wacom_wac1, *wacom_wac2;
2378         int error;
2379
2380         /*
2381          * Regardless if this is a disconnect or a new tablet,
2382          * remove any existing input and battery devices.
2383          */
2384
2385         wacom_destroy_battery(wacom);
2386
2387         /* Stylus interface */
2388         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2389         wacom1 = hid_get_drvdata(hdev1);
2390         wacom_wac1 = &(wacom1->wacom_wac);
2391         wacom_release_resources(wacom1);
2392
2393         /* Touch interface */
2394         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2395         wacom2 = hid_get_drvdata(hdev2);
2396         wacom_wac2 = &(wacom2->wacom_wac);
2397         wacom_release_resources(wacom2);
2398
2399         if (wacom_wac->pid == 0) {
2400                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2401         } else {
2402                 const struct hid_device_id *id = wacom_ids;
2403
2404                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2405                          wacom_wac->pid);
2406
2407                 while (id->bus) {
2408                         if (id->vendor == USB_VENDOR_ID_WACOM &&
2409                             id->product == wacom_wac->pid)
2410                                 break;
2411                         id++;
2412                 }
2413
2414                 if (!id->bus) {
2415                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
2416                         return;
2417                 }
2418
2419                 /* Stylus interface */
2420                 wacom_wac1->features =
2421                         *((struct wacom_features *)id->driver_data);
2422
2423                 wacom_wac1->pid = wacom_wac->pid;
2424                 hid_hw_stop(hdev1);
2425                 error = wacom_parse_and_register(wacom1, true);
2426                 if (error)
2427                         goto fail;
2428
2429                 /* Touch interface */
2430                 if (wacom_wac1->features.touch_max ||
2431                     (wacom_wac1->features.type >= INTUOSHT &&
2432                     wacom_wac1->features.type <= BAMBOO_PT)) {
2433                         wacom_wac2->features =
2434                                 *((struct wacom_features *)id->driver_data);
2435                         wacom_wac2->pid = wacom_wac->pid;
2436                         hid_hw_stop(hdev2);
2437                         error = wacom_parse_and_register(wacom2, true);
2438                         if (error)
2439                                 goto fail;
2440                 }
2441
2442                 strlcpy(wacom_wac->name, wacom_wac1->name,
2443                         sizeof(wacom_wac->name));
2444                 error = wacom_initialize_battery(wacom);
2445                 if (error)
2446                         goto fail;
2447         }
2448
2449         return;
2450
2451 fail:
2452         wacom_release_resources(wacom1);
2453         wacom_release_resources(wacom2);
2454         return;
2455 }
2456
2457 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2458 {
2459         struct wacom_remote *remote = wacom->remote;
2460         u32 serial = remote->remotes[index].serial;
2461         int i;
2462         unsigned long flags;
2463
2464         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2465                 if (remote->remotes[i].serial == serial) {
2466
2467                         spin_lock_irqsave(&remote->remote_lock, flags);
2468                         remote->remotes[i].registered = false;
2469                         spin_unlock_irqrestore(&remote->remote_lock, flags);
2470
2471                         if (remote->remotes[i].battery.battery)
2472                                 devres_release_group(&wacom->hdev->dev,
2473                                                      &remote->remotes[i].battery.bat_desc);
2474
2475                         if (remote->remotes[i].group.name)
2476                                 devres_release_group(&wacom->hdev->dev,
2477                                                      &remote->remotes[i]);
2478
2479                         remote->remotes[i].serial = 0;
2480                         remote->remotes[i].group.name = NULL;
2481                         remote->remotes[i].battery.battery = NULL;
2482                         wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2483                 }
2484         }
2485 }
2486
2487 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2488                                    unsigned int index)
2489 {
2490         struct wacom_remote *remote = wacom->remote;
2491         struct device *dev = &wacom->hdev->dev;
2492         int error, k;
2493
2494         /* A remote can pair more than once with an EKR,
2495          * check to make sure this serial isn't already paired.
2496          */
2497         for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2498                 if (remote->remotes[k].serial == serial)
2499                         break;
2500         }
2501
2502         if (k < WACOM_MAX_REMOTES) {
2503                 remote->remotes[index].serial = serial;
2504                 return 0;
2505         }
2506
2507         if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2508                 return -ENOMEM;
2509
2510         error = wacom_remote_create_attr_group(wacom, serial, index);
2511         if (error)
2512                 goto fail;
2513
2514         remote->remotes[index].input = wacom_allocate_input(wacom);
2515         if (!remote->remotes[index].input) {
2516                 error = -ENOMEM;
2517                 goto fail;
2518         }
2519         remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2520         remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2521
2522         if (!remote->remotes[index].input->name) {
2523                 error = -EINVAL;
2524                 goto fail;
2525         }
2526
2527         error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2528                                                    &wacom->wacom_wac);
2529         if (error)
2530                 goto fail;
2531
2532         remote->remotes[index].serial = serial;
2533
2534         error = input_register_device(remote->remotes[index].input);
2535         if (error)
2536                 goto fail;
2537
2538         error = wacom_led_groups_alloc_and_register_one(
2539                                         &remote->remotes[index].input->dev,
2540                                         wacom, index, 3, true);
2541         if (error)
2542                 goto fail;
2543
2544         remote->remotes[index].registered = true;
2545
2546         devres_close_group(dev, &remote->remotes[index]);
2547         return 0;
2548
2549 fail:
2550         devres_release_group(dev, &remote->remotes[index]);
2551         remote->remotes[index].serial = 0;
2552         return error;
2553 }
2554
2555 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2556 {
2557         struct wacom_remote *remote = wacom->remote;
2558         int error;
2559
2560         if (!remote->remotes[index].registered)
2561                 return 0;
2562
2563         if (remote->remotes[index].battery.battery)
2564                 return 0;
2565
2566         if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2567                 return 0;
2568
2569         error = __wacom_initialize_battery(wacom,
2570                                         &wacom->remote->remotes[index].battery);
2571         if (error)
2572                 return error;
2573
2574         return 0;
2575 }
2576
2577 static void wacom_remote_work(struct work_struct *work)
2578 {
2579         struct wacom *wacom = container_of(work, struct wacom, remote_work);
2580         struct wacom_remote *remote = wacom->remote;
2581         struct wacom_remote_data data;
2582         unsigned long flags;
2583         unsigned int count;
2584         u32 serial;
2585         int i;
2586
2587         spin_lock_irqsave(&remote->remote_lock, flags);
2588
2589         count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2590
2591         if (count != sizeof(data)) {
2592                 hid_err(wacom->hdev,
2593                         "workitem triggered without status available\n");
2594                 spin_unlock_irqrestore(&remote->remote_lock, flags);
2595                 return;
2596         }
2597
2598         if (!kfifo_is_empty(&remote->remote_fifo))
2599                 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2600
2601         spin_unlock_irqrestore(&remote->remote_lock, flags);
2602
2603         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2604                 serial = data.remote[i].serial;
2605                 if (data.remote[i].connected) {
2606
2607                         if (remote->remotes[i].serial == serial) {
2608                                 wacom_remote_attach_battery(wacom, i);
2609                                 continue;
2610                         }
2611
2612                         if (remote->remotes[i].serial)
2613                                 wacom_remote_destroy_one(wacom, i);
2614
2615                         wacom_remote_create_one(wacom, serial, i);
2616
2617                 } else if (remote->remotes[i].serial) {
2618                         wacom_remote_destroy_one(wacom, i);
2619                 }
2620         }
2621 }
2622
2623 static void wacom_mode_change_work(struct work_struct *work)
2624 {
2625         struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
2626         struct wacom_shared *shared = wacom->wacom_wac.shared;
2627         struct wacom *wacom1 = NULL;
2628         struct wacom *wacom2 = NULL;
2629         bool is_direct = wacom->wacom_wac.is_direct_mode;
2630         int error = 0;
2631
2632         if (shared->pen) {
2633                 wacom1 = hid_get_drvdata(shared->pen);
2634                 wacom_release_resources(wacom1);
2635                 hid_hw_stop(wacom1->hdev);
2636                 wacom1->wacom_wac.has_mode_change = true;
2637                 wacom1->wacom_wac.is_direct_mode = is_direct;
2638         }
2639
2640         if (shared->touch) {
2641                 wacom2 = hid_get_drvdata(shared->touch);
2642                 wacom_release_resources(wacom2);
2643                 hid_hw_stop(wacom2->hdev);
2644                 wacom2->wacom_wac.has_mode_change = true;
2645                 wacom2->wacom_wac.is_direct_mode = is_direct;
2646         }
2647
2648         if (wacom1) {
2649                 error = wacom_parse_and_register(wacom1, false);
2650                 if (error)
2651                         return;
2652         }
2653
2654         if (wacom2) {
2655                 error = wacom_parse_and_register(wacom2, false);
2656                 if (error)
2657                         return;
2658         }
2659
2660         return;
2661 }
2662
2663 static int wacom_probe(struct hid_device *hdev,
2664                 const struct hid_device_id *id)
2665 {
2666         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2667         struct usb_device *dev = interface_to_usbdev(intf);
2668         struct wacom *wacom;
2669         struct wacom_wac *wacom_wac;
2670         struct wacom_features *features;
2671         int error;
2672
2673         if (!id->driver_data)
2674                 return -EINVAL;
2675
2676         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2677
2678         /* hid-core sets this quirk for the boot interface */
2679         hdev->quirks &= ~HID_QUIRK_NOGET;
2680
2681         wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2682         if (!wacom)
2683                 return -ENOMEM;
2684
2685         hid_set_drvdata(hdev, wacom);
2686         wacom->hdev = hdev;
2687
2688         wacom_wac = &wacom->wacom_wac;
2689         wacom_wac->features = *((struct wacom_features *)id->driver_data);
2690         features = &wacom_wac->features;
2691
2692         if (features->check_for_hid_type && features->hid_type != hdev->type) {
2693                 error = -ENODEV;
2694                 goto fail;
2695         }
2696
2697         error = kfifo_alloc(&wacom_wac->pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL);
2698         if (error)
2699                 goto fail;
2700
2701         wacom_wac->hid_data.inputmode = -1;
2702         wacom_wac->mode_report = -1;
2703
2704         wacom->usbdev = dev;
2705         wacom->intf = intf;
2706         mutex_init(&wacom->lock);
2707         INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
2708         INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2709         INIT_WORK(&wacom->battery_work, wacom_battery_work);
2710         INIT_WORK(&wacom->remote_work, wacom_remote_work);
2711         INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
2712
2713         /* ask for the report descriptor to be loaded by HID */
2714         error = hid_parse(hdev);
2715         if (error) {
2716                 hid_err(hdev, "parse failed\n");
2717                 goto fail;
2718         }
2719
2720         error = wacom_parse_and_register(wacom, false);
2721         if (error)
2722                 goto fail;
2723
2724         if (hdev->bus == BUS_BLUETOOTH) {
2725                 error = device_create_file(&hdev->dev, &dev_attr_speed);
2726                 if (error)
2727                         hid_warn(hdev,
2728                                  "can't create sysfs speed attribute err: %d\n",
2729                                  error);
2730         }
2731
2732         return 0;
2733
2734 fail:
2735         hid_set_drvdata(hdev, NULL);
2736         return error;
2737 }
2738
2739 static void wacom_remove(struct hid_device *hdev)
2740 {
2741         struct wacom *wacom = hid_get_drvdata(hdev);
2742         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2743         struct wacom_features *features = &wacom_wac->features;
2744
2745         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2746                 hid_hw_close(hdev);
2747
2748         hid_hw_stop(hdev);
2749
2750         cancel_delayed_work_sync(&wacom->init_work);
2751         cancel_work_sync(&wacom->wireless_work);
2752         cancel_work_sync(&wacom->battery_work);
2753         cancel_work_sync(&wacom->remote_work);
2754         cancel_work_sync(&wacom->mode_change_work);
2755         if (hdev->bus == BUS_BLUETOOTH)
2756                 device_remove_file(&hdev->dev, &dev_attr_speed);
2757
2758         /* make sure we don't trigger the LEDs */
2759         wacom_led_groups_release(wacom);
2760
2761         if (wacom->wacom_wac.features.type != REMOTE)
2762                 wacom_release_resources(wacom);
2763
2764         kfifo_free(&wacom_wac->pen_fifo);
2765
2766         hid_set_drvdata(hdev, NULL);
2767 }
2768
2769 #ifdef CONFIG_PM
2770 static int wacom_resume(struct hid_device *hdev)
2771 {
2772         struct wacom *wacom = hid_get_drvdata(hdev);
2773
2774         mutex_lock(&wacom->lock);
2775
2776         /* switch to wacom mode first */
2777         _wacom_query_tablet_data(wacom);
2778         wacom_led_control(wacom);
2779
2780         mutex_unlock(&wacom->lock);
2781
2782         return 0;
2783 }
2784
2785 static int wacom_reset_resume(struct hid_device *hdev)
2786 {
2787         return wacom_resume(hdev);
2788 }
2789 #endif /* CONFIG_PM */
2790
2791 static struct hid_driver wacom_driver = {
2792         .name =         "wacom",
2793         .id_table =     wacom_ids,
2794         .probe =        wacom_probe,
2795         .remove =       wacom_remove,
2796         .report =       wacom_wac_report,
2797 #ifdef CONFIG_PM
2798         .resume =       wacom_resume,
2799         .reset_resume = wacom_reset_resume,
2800 #endif
2801         .raw_event =    wacom_raw_event,
2802 };
2803 module_hid_driver(wacom_driver);
2804
2805 MODULE_VERSION(DRIVER_VERSION);
2806 MODULE_AUTHOR(DRIVER_AUTHOR);
2807 MODULE_DESCRIPTION(DRIVER_DESC);
2808 MODULE_LICENSE("GPL");