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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[linux/fpc-iii.git] / drivers / hid / wacom_sys.c
blob0bdd85d486feeb2fec33f7651f201df146c8cd71
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_hid_usage_quirk(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 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
219
220 /*
221 * The Dell Canvas 27 needs to be switched to its vendor-defined
222 * report to provide the best resolution.
223 */
224 if (hdev->vendor == USB_VENDOR_ID_WACOM &&
225 hdev->product == 0x4200 &&
226 field->application == HID_UP_MSVENDOR) {
227 wacom->wacom_wac.mode_report = field->report->id;
228 wacom->wacom_wac.mode_value = 2;
229 }
230
231 /*
232 * ISDv4 devices which predate HID's adoption of the
233 * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
234 * position instead. We can accurately detect if a
235 * usage with that value should be HID_DG_BARRELSWITCH2
236 * based on the surrounding usages, which have remained
237 * constant across generations.
238 */
239 if (features->type == HID_GENERIC &&
240 usage->hid == 0x000D0000 &&
241 field->application == HID_DG_PEN &&
242 field->physical == HID_DG_STYLUS) {
243 int i = usage->usage_index;
244
245 if (i-4 >= 0 && i+1 < field->maxusage &&
246 field->usage[i-4].hid == HID_DG_TIPSWITCH &&
247 field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
248 field->usage[i-2].hid == HID_DG_ERASER &&
249 field->usage[i-1].hid == HID_DG_INVERT &&
250 field->usage[i+1].hid == HID_DG_INRANGE) {
251 usage->hid = HID_DG_BARRELSWITCH2;
252 }
253 }
254
255 /* 2nd-generation Intuos Pro Large has incorrect Y maximum */
256 if (hdev->vendor == USB_VENDOR_ID_WACOM &&
257 hdev->product == 0x0358 &&
258 WACOM_PEN_FIELD(field) &&
259 equivalent_usage == HID_GD_Y) {
260 field->logical_maximum = 43200;
261 }
262 }
263
264 static void wacom_feature_mapping(struct hid_device *hdev,
265 struct hid_field *field, struct hid_usage *usage)
266 {
267 struct wacom *wacom = hid_get_drvdata(hdev);
268 struct wacom_features *features = &wacom->wacom_wac.features;
269 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
270 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
271 u8 *data;
272 int ret;
273 u32 n;
274
275 wacom_hid_usage_quirk(hdev, field, usage);
276
277 switch (equivalent_usage) {
278 case HID_DG_CONTACTMAX:
279 /* leave touch_max as is if predefined */
280 if (!features->touch_max) {
281 /* read manually */
282 data = kzalloc(2, GFP_KERNEL);
283 if (!data)
284 break;
285 data[0] = field->report->id;
286 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
287 data, 2, WAC_CMD_RETRIES);
288 if (ret == 2) {
289 features->touch_max = data[1];
290 } else {
291 features->touch_max = 16;
292 hid_warn(hdev, "wacom_feature_mapping: "
293 "could not get HID_DG_CONTACTMAX, "
294 "defaulting to %d\n",
295 features->touch_max);
296 }
297 kfree(data);
298 }
299 break;
300 case HID_DG_INPUTMODE:
301 /* Ignore if value index is out of bounds. */
302 if (usage->usage_index >= field->report_count) {
303 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
304 break;
305 }
306
307 hid_data->inputmode = field->report->id;
308 hid_data->inputmode_index = usage->usage_index;
309 break;
310
311 case HID_UP_DIGITIZER:
312 if (field->report->id == 0x0B &&
313 (field->application == WACOM_HID_G9_PEN ||
314 field->application == WACOM_HID_G11_PEN)) {
315 wacom->wacom_wac.mode_report = field->report->id;
316 wacom->wacom_wac.mode_value = 0;
317 }
318 break;
319
320 case WACOM_HID_WD_DATAMODE:
321 wacom->wacom_wac.mode_report = field->report->id;
322 wacom->wacom_wac.mode_value = 2;
323 break;
324
325 case WACOM_HID_UP_G9:
326 case WACOM_HID_UP_G11:
327 if (field->report->id == 0x03 &&
328 (field->application == WACOM_HID_G9_TOUCHSCREEN ||
329 field->application == WACOM_HID_G11_TOUCHSCREEN)) {
330 wacom->wacom_wac.mode_report = field->report->id;
331 wacom->wacom_wac.mode_value = 0;
332 }
333 break;
334 case WACOM_HID_WD_OFFSETLEFT:
335 case WACOM_HID_WD_OFFSETTOP:
336 case WACOM_HID_WD_OFFSETRIGHT:
337 case WACOM_HID_WD_OFFSETBOTTOM:
338 /* read manually */
339 n = hid_report_len(field->report);
340 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
341 if (!data)
342 break;
343 data[0] = field->report->id;
344 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
345 data, n, WAC_CMD_RETRIES);
346 if (ret == n) {
347 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
348 data, n, 0);
349 } else {
350 hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
351 __func__);
352 }
353 kfree(data);
354 break;
355 }
356 }
357
358 /*
359 * Interface Descriptor of wacom devices can be incomplete and
360 * inconsistent so wacom_features table is used to store stylus
361 * device's packet lengths, various maximum values, and tablet
362 * resolution based on product ID's.
363 *
364 * For devices that contain 2 interfaces, wacom_features table is
365 * inaccurate for the touch interface. Since the Interface Descriptor
366 * for touch interfaces has pretty complete data, this function exists
367 * to query tablet for this missing information instead of hard coding in
368 * an additional table.
369 *
370 * A typical Interface Descriptor for a stylus will contain a
371 * boot mouse application collection that is not of interest and this
372 * function will ignore it.
373 *
374 * It also contains a digitizer application collection that also is not
375 * of interest since any information it contains would be duplicate
376 * of what is in wacom_features. Usually it defines a report of an array
377 * of bytes that could be used as max length of the stylus packet returned.
378 * If it happens to define a Digitizer-Stylus Physical Collection then
379 * the X and Y logical values contain valid data but it is ignored.
380 *
381 * A typical Interface Descriptor for a touch interface will contain a
382 * Digitizer-Finger Physical Collection which will define both logical
383 * X/Y maximum as well as the physical size of tablet. Since touch
384 * interfaces haven't supported pressure or distance, this is enough
385 * information to override invalid values in the wacom_features table.
386 *
387 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
388 * data. We deal with them after returning from this function.
389 */
390 static void wacom_usage_mapping(struct hid_device *hdev,
391 struct hid_field *field, struct hid_usage *usage)
392 {
393 struct wacom *wacom = hid_get_drvdata(hdev);
394 struct wacom_features *features = &wacom->wacom_wac.features;
395 bool finger = WACOM_FINGER_FIELD(field);
396 bool pen = WACOM_PEN_FIELD(field);
397 unsigned equivalent_usage = wacom_equivalent_usage(usage->hid);
398
399 /*
400 * Requiring Stylus Usage will ignore boot mouse
401 * X/Y values and some cases of invalid Digitizer X/Y
402 * values commonly reported.
403 */
404 if (pen)
405 features->device_type |= WACOM_DEVICETYPE_PEN;
406 else if (finger)
407 features->device_type |= WACOM_DEVICETYPE_TOUCH;
408 else
409 return;
410
411 wacom_hid_usage_quirk(hdev, field, usage);
412
413 switch (equivalent_usage) {
414 case HID_GD_X:
415 features->x_max = field->logical_maximum;
416 if (finger) {
417 features->x_phy = field->physical_maximum;
418 if ((features->type != BAMBOO_PT) &&
419 (features->type != BAMBOO_TOUCH)) {
420 features->unit = field->unit;
421 features->unitExpo = field->unit_exponent;
422 }
423 }
424 break;
425 case HID_GD_Y:
426 features->y_max = field->logical_maximum;
427 if (finger) {
428 features->y_phy = field->physical_maximum;
429 if ((features->type != BAMBOO_PT) &&
430 (features->type != BAMBOO_TOUCH)) {
431 features->unit = field->unit;
432 features->unitExpo = field->unit_exponent;
433 }
434 }
435 break;
436 case HID_DG_TIPPRESSURE:
437 if (pen)
438 features->pressure_max = field->logical_maximum;
439 break;
440 }
441
442 if (features->type == HID_GENERIC)
443 wacom_wac_usage_mapping(hdev, field, usage);
444 }
445
446 static void wacom_post_parse_hid(struct hid_device *hdev,
447 struct wacom_features *features)
448 {
449 struct wacom *wacom = hid_get_drvdata(hdev);
450 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
451
452 if (features->type == HID_GENERIC) {
453 /* Any last-minute generic device setup */
454 if (wacom_wac->has_mode_change) {
455 if (wacom_wac->is_direct_mode)
456 features->device_type |= WACOM_DEVICETYPE_DIRECT;
457 else
458 features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
459 }
460
461 if (features->touch_max > 1) {
462 if (features->device_type & WACOM_DEVICETYPE_DIRECT)
463 input_mt_init_slots(wacom_wac->touch_input,
464 wacom_wac->features.touch_max,
465 INPUT_MT_DIRECT);
466 else
467 input_mt_init_slots(wacom_wac->touch_input,
468 wacom_wac->features.touch_max,
469 INPUT_MT_POINTER);
470 }
471 }
472 }
473
474 static void wacom_parse_hid(struct hid_device *hdev,
475 struct wacom_features *features)
476 {
477 struct hid_report_enum *rep_enum;
478 struct hid_report *hreport;
479 int i, j;
480
481 /* check features first */
482 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
483 list_for_each_entry(hreport, &rep_enum->report_list, list) {
484 for (i = 0; i < hreport->maxfield; i++) {
485 /* Ignore if report count is out of bounds. */
486 if (hreport->field[i]->report_count < 1)
487 continue;
488
489 for (j = 0; j < hreport->field[i]->maxusage; j++) {
490 wacom_feature_mapping(hdev, hreport->field[i],
491 hreport->field[i]->usage + j);
492 }
493 }
494 }
495
496 /* now check the input usages */
497 rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
498 list_for_each_entry(hreport, &rep_enum->report_list, list) {
499
500 if (!hreport->maxfield)
501 continue;
502
503 for (i = 0; i < hreport->maxfield; i++)
504 for (j = 0; j < hreport->field[i]->maxusage; j++)
505 wacom_usage_mapping(hdev, hreport->field[i],
506 hreport->field[i]->usage + j);
507 }
508
509 wacom_post_parse_hid(hdev, features);
510 }
511
512 static int wacom_hid_set_device_mode(struct hid_device *hdev)
513 {
514 struct wacom *wacom = hid_get_drvdata(hdev);
515 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
516 struct hid_report *r;
517 struct hid_report_enum *re;
518
519 if (hid_data->inputmode < 0)
520 return 0;
521
522 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
523 r = re->report_id_hash[hid_data->inputmode];
524 if (r) {
525 r->field[0]->value[hid_data->inputmode_index] = 2;
526 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
527 }
528 return 0;
529 }
530
531 static int wacom_set_device_mode(struct hid_device *hdev,
532 struct wacom_wac *wacom_wac)
533 {
534 u8 *rep_data;
535 struct hid_report *r;
536 struct hid_report_enum *re;
537 u32 length;
538 int error = -ENOMEM, limit = 0;
539
540 if (wacom_wac->mode_report < 0)
541 return 0;
542
543 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
544 r = re->report_id_hash[wacom_wac->mode_report];
545 if (!r)
546 return -EINVAL;
547
548 rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
549 if (!rep_data)
550 return -ENOMEM;
551
552 length = hid_report_len(r);
553
554 do {
555 rep_data[0] = wacom_wac->mode_report;
556 rep_data[1] = wacom_wac->mode_value;
557
558 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
559 length, 1);
560 if (error >= 0)
561 error = wacom_get_report(hdev, HID_FEATURE_REPORT,
562 rep_data, length, 1);
563 } while (error >= 0 &&
564 rep_data[1] != wacom_wac->mode_report &&
565 limit++ < WAC_MSG_RETRIES);
566
567 kfree(rep_data);
568
569 return error < 0 ? error : 0;
570 }
571
572 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
573 struct wacom_features *features)
574 {
575 struct wacom *wacom = hid_get_drvdata(hdev);
576 int ret;
577 u8 rep_data[2];
578
579 switch (features->type) {
580 case GRAPHIRE_BT:
581 rep_data[0] = 0x03;
582 rep_data[1] = 0x00;
583 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
584 3);
585
586 if (ret >= 0) {
587 rep_data[0] = speed == 0 ? 0x05 : 0x06;
588 rep_data[1] = 0x00;
589
590 ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
591 rep_data, 2, 3);
592
593 if (ret >= 0) {
594 wacom->wacom_wac.bt_high_speed = speed;
595 return 0;
596 }
597 }
598
599 /*
600 * Note that if the raw queries fail, it's not a hard failure
601 * and it is safe to continue
602 */
603 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
604 rep_data[0], ret);
605 break;
606 case INTUOS4WL:
607 if (speed == 1)
608 wacom->wacom_wac.bt_features &= ~0x20;
609 else
610 wacom->wacom_wac.bt_features |= 0x20;
611
612 rep_data[0] = 0x03;
613 rep_data[1] = wacom->wacom_wac.bt_features;
614
615 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
616 1);
617 if (ret >= 0)
618 wacom->wacom_wac.bt_high_speed = speed;
619 break;
620 }
621
622 return 0;
623 }
624
625 /*
626 * Switch the tablet into its most-capable mode. Wacom tablets are
627 * typically configured to power-up in a mode which sends mouse-like
628 * reports to the OS. To get absolute position, pressure data, etc.
629 * from the tablet, it is necessary to switch the tablet out of this
630 * mode and into one which sends the full range of tablet data.
631 */
632 static int _wacom_query_tablet_data(struct wacom *wacom)
633 {
634 struct hid_device *hdev = wacom->hdev;
635 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
636 struct wacom_features *features = &wacom_wac->features;
637
638 if (hdev->bus == BUS_BLUETOOTH)
639 return wacom_bt_query_tablet_data(hdev, 1, features);
640
641 if (features->type != HID_GENERIC) {
642 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
643 if (features->type > TABLETPC) {
644 /* MT Tablet PC touch */
645 wacom_wac->mode_report = 3;
646 wacom_wac->mode_value = 4;
647 } else if (features->type == WACOM_24HDT) {
648 wacom_wac->mode_report = 18;
649 wacom_wac->mode_value = 2;
650 } else if (features->type == WACOM_27QHDT) {
651 wacom_wac->mode_report = 131;
652 wacom_wac->mode_value = 2;
653 } else if (features->type == BAMBOO_PAD) {
654 wacom_wac->mode_report = 2;
655 wacom_wac->mode_value = 2;
656 }
657 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
658 if (features->type <= BAMBOO_PT) {
659 wacom_wac->mode_report = 2;
660 wacom_wac->mode_value = 2;
661 }
662 }
663 }
664
665 wacom_set_device_mode(hdev, wacom_wac);
666
667 if (features->type == HID_GENERIC)
668 return wacom_hid_set_device_mode(hdev);
669
670 return 0;
671 }
672
673 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
674 struct wacom_features *features)
675 {
676 struct wacom *wacom = hid_get_drvdata(hdev);
677 struct usb_interface *intf = wacom->intf;
678
679 /* default features */
680 features->x_fuzz = 4;
681 features->y_fuzz = 4;
682 features->pressure_fuzz = 0;
683 features->distance_fuzz = 1;
684 features->tilt_fuzz = 1;
685
686 /*
687 * The wireless device HID is basic and layout conflicts with
688 * other tablets (monitor and touch interface can look like pen).
689 * Skip the query for this type and modify defaults based on
690 * interface number.
691 */
692 if (features->type == WIRELESS) {
693 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
694 features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
695 else
696 features->device_type = WACOM_DEVICETYPE_NONE;
697 return;
698 }
699
700 wacom_parse_hid(hdev, features);
701 }
702
703 struct wacom_hdev_data {
704 struct list_head list;
705 struct kref kref;
706 struct hid_device *dev;
707 struct wacom_shared shared;
708 };
709
710 static LIST_HEAD(wacom_udev_list);
711 static DEFINE_MUTEX(wacom_udev_list_lock);
712
713 static bool wacom_are_sibling(struct hid_device *hdev,
714 struct hid_device *sibling)
715 {
716 struct wacom *wacom = hid_get_drvdata(hdev);
717 struct wacom_features *features = &wacom->wacom_wac.features;
718 struct wacom *sibling_wacom = hid_get_drvdata(sibling);
719 struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
720 __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
721 __u32 oPid = features->oPid ? features->oPid : hdev->product;
722
723 /* The defined oVid/oPid must match that of the sibling */
724 if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
725 return false;
726 if (features->oPid != HID_ANY_ID && sibling->product != oPid)
727 return false;
728
729 /*
730 * Devices with the same VID/PID must share the same physical
731 * device path, while those with different VID/PID must share
732 * the same physical parent device path.
733 */
734 if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
735 if (!hid_compare_device_paths(hdev, sibling, '/'))
736 return false;
737 } else {
738 if (!hid_compare_device_paths(hdev, sibling, '.'))
739 return false;
740 }
741
742 /* Skip the remaining heuristics unless you are a HID_GENERIC device */
743 if (features->type != HID_GENERIC)
744 return true;
745
746 /*
747 * Direct-input devices may not be siblings of indirect-input
748 * devices.
749 */
750 if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
751 !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
752 return false;
753
754 /*
755 * Indirect-input devices may not be siblings of direct-input
756 * devices.
757 */
758 if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
759 (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
760 return false;
761
762 /* Pen devices may only be siblings of touch devices */
763 if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
764 !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
765 return false;
766
767 /* Touch devices may only be siblings of pen devices */
768 if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
769 !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
770 return false;
771
772 /*
773 * No reason could be found for these two devices to NOT be
774 * siblings, so there's a good chance they ARE siblings
775 */
776 return true;
777 }
778
779 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
780 {
781 struct wacom_hdev_data *data;
782
783 /* Try to find an already-probed interface from the same device */
784 list_for_each_entry(data, &wacom_udev_list, list) {
785 if (hid_compare_device_paths(hdev, data->dev, '/')) {
786 kref_get(&data->kref);
787 return data;
788 }
789 }
790
791 /* Fallback to finding devices that appear to be "siblings" */
792 list_for_each_entry(data, &wacom_udev_list, list) {
793 if (wacom_are_sibling(hdev, data->dev)) {
794 kref_get(&data->kref);
795 return data;
796 }
797 }
798
799 return NULL;
800 }
801
802 static void wacom_release_shared_data(struct kref *kref)
803 {
804 struct wacom_hdev_data *data =
805 container_of(kref, struct wacom_hdev_data, kref);
806
807 mutex_lock(&wacom_udev_list_lock);
808 list_del(&data->list);
809 mutex_unlock(&wacom_udev_list_lock);
810
811 kfree(data);
812 }
813
814 static void wacom_remove_shared_data(void *res)
815 {
816 struct wacom *wacom = res;
817 struct wacom_hdev_data *data;
818 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
819
820 if (wacom_wac->shared) {
821 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
822 shared);
823
824 if (wacom_wac->shared->touch == wacom->hdev)
825 wacom_wac->shared->touch = NULL;
826 else if (wacom_wac->shared->pen == wacom->hdev)
827 wacom_wac->shared->pen = NULL;
828
829 kref_put(&data->kref, wacom_release_shared_data);
830 wacom_wac->shared = NULL;
831 }
832 }
833
834 static int wacom_add_shared_data(struct hid_device *hdev)
835 {
836 struct wacom *wacom = hid_get_drvdata(hdev);
837 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
838 struct wacom_hdev_data *data;
839 int retval = 0;
840
841 mutex_lock(&wacom_udev_list_lock);
842
843 data = wacom_get_hdev_data(hdev);
844 if (!data) {
845 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
846 if (!data) {
847 retval = -ENOMEM;
848 goto out;
849 }
850
851 kref_init(&data->kref);
852 data->dev = hdev;
853 list_add_tail(&data->list, &wacom_udev_list);
854 }
855
856 wacom_wac->shared = &data->shared;
857
858 retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
859 if (retval) {
860 mutex_unlock(&wacom_udev_list_lock);
861 wacom_remove_shared_data(wacom);
862 return retval;
863 }
864
865 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
866 wacom_wac->shared->touch = hdev;
867 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
868 wacom_wac->shared->pen = hdev;
869
870 out:
871 mutex_unlock(&wacom_udev_list_lock);
872 return retval;
873 }
874
875 static int wacom_led_control(struct wacom *wacom)
876 {
877 unsigned char *buf;
878 int retval;
879 unsigned char report_id = WAC_CMD_LED_CONTROL;
880 int buf_size = 9;
881
882 if (!wacom->led.groups)
883 return -ENOTSUPP;
884
885 if (wacom->wacom_wac.features.type == REMOTE)
886 return -ENOTSUPP;
887
888 if (wacom->wacom_wac.pid) { /* wireless connected */
889 report_id = WAC_CMD_WL_LED_CONTROL;
890 buf_size = 13;
891 }
892 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
893 report_id = WAC_CMD_WL_INTUOSP2;
894 buf_size = 51;
895 }
896 buf = kzalloc(buf_size, GFP_KERNEL);
897 if (!buf)
898 return -ENOMEM;
899
900 if (wacom->wacom_wac.features.type == HID_GENERIC) {
901 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
902 buf[1] = wacom->led.llv;
903 buf[2] = wacom->led.groups[0].select & 0x03;
904
905 } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
906 wacom->wacom_wac.features.type <= INTUOSPL)) {
907 /*
908 * Touch Ring and crop mark LED luminance may take on
909 * one of four values:
910 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
911 */
912 int ring_led = wacom->led.groups[0].select & 0x03;
913 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
914 int crop_lum = 0;
915 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
916
917 buf[0] = report_id;
918 if (wacom->wacom_wac.pid) {
919 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
920 buf, buf_size, WAC_CMD_RETRIES);
921 buf[0] = report_id;
922 buf[4] = led_bits;
923 } else
924 buf[1] = led_bits;
925 }
926 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
927 buf[0] = report_id;
928 buf[4] = 100; // Power Connection LED (ORANGE)
929 buf[5] = 100; // BT Connection LED (BLUE)
930 buf[6] = 100; // Paper Mode (RED?)
931 buf[7] = 100; // Paper Mode (GREEN?)
932 buf[8] = 100; // Paper Mode (BLUE?)
933 buf[9] = wacom->led.llv;
934 buf[10] = wacom->led.groups[0].select & 0x03;
935 }
936 else {
937 int led = wacom->led.groups[0].select | 0x4;
938
939 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
940 wacom->wacom_wac.features.type == WACOM_24HD)
941 led |= (wacom->led.groups[1].select << 4) | 0x40;
942
943 buf[0] = report_id;
944 buf[1] = led;
945 buf[2] = wacom->led.llv;
946 buf[3] = wacom->led.hlv;
947 buf[4] = wacom->led.img_lum;
948 }
949
950 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
951 WAC_CMD_RETRIES);
952 kfree(buf);
953
954 return retval;
955 }
956
957 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
958 const unsigned len, const void *img)
959 {
960 unsigned char *buf;
961 int i, retval;
962 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
963
964 buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
965 if (!buf)
966 return -ENOMEM;
967
968 /* Send 'start' command */
969 buf[0] = WAC_CMD_ICON_START;
970 buf[1] = 1;
971 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
972 WAC_CMD_RETRIES);
973 if (retval < 0)
974 goto out;
975
976 buf[0] = xfer_id;
977 buf[1] = button_id & 0x07;
978 for (i = 0; i < 4; i++) {
979 buf[2] = i;
980 memcpy(buf + 3, img + i * chunk_len, chunk_len);
981
982 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
983 buf, chunk_len + 3, WAC_CMD_RETRIES);
984 if (retval < 0)
985 break;
986 }
987
988 /* Send 'stop' */
989 buf[0] = WAC_CMD_ICON_START;
990 buf[1] = 0;
991 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
992 WAC_CMD_RETRIES);
993
994 out:
995 kfree(buf);
996 return retval;
997 }
998
999 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
1000 const char *buf, size_t count)
1001 {
1002 struct hid_device *hdev = to_hid_device(dev);
1003 struct wacom *wacom = hid_get_drvdata(hdev);
1004 unsigned int id;
1005 int err;
1006
1007 err = kstrtouint(buf, 10, &id);
1008 if (err)
1009 return err;
1010
1011 mutex_lock(&wacom->lock);
1012
1013 wacom->led.groups[set_id].select = id & 0x3;
1014 err = wacom_led_control(wacom);
1015
1016 mutex_unlock(&wacom->lock);
1017
1018 return err < 0 ? err : count;
1019 }
1020
1021 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
1022 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
1023 struct device_attribute *attr, const char *buf, size_t count) \
1024 { \
1025 return wacom_led_select_store(dev, SET_ID, buf, count); \
1026 } \
1027 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
1028 struct device_attribute *attr, char *buf) \
1029 { \
1030 struct hid_device *hdev = to_hid_device(dev);\
1031 struct wacom *wacom = hid_get_drvdata(hdev); \
1032 return scnprintf(buf, PAGE_SIZE, "%d\n", \
1033 wacom->led.groups[SET_ID].select); \
1034 } \
1035 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \
1036 wacom_led##SET_ID##_select_show, \
1037 wacom_led##SET_ID##_select_store)
1038
1039 DEVICE_LED_SELECT_ATTR(0);
1040 DEVICE_LED_SELECT_ATTR(1);
1041
1042 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
1043 const char *buf, size_t count)
1044 {
1045 unsigned int value;
1046 int err;
1047
1048 err = kstrtouint(buf, 10, &value);
1049 if (err)
1050 return err;
1051
1052 mutex_lock(&wacom->lock);
1053
1054 *dest = value & 0x7f;
1055 err = wacom_led_control(wacom);
1056
1057 mutex_unlock(&wacom->lock);
1058
1059 return err < 0 ? err : count;
1060 }
1061
1062 #define DEVICE_LUMINANCE_ATTR(name, field) \
1063 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
1064 struct device_attribute *attr, const char *buf, size_t count) \
1065 { \
1066 struct hid_device *hdev = to_hid_device(dev);\
1067 struct wacom *wacom = hid_get_drvdata(hdev); \
1068 \
1069 return wacom_luminance_store(wacom, &wacom->led.field, \
1070 buf, count); \
1071 } \
1072 static ssize_t wacom_##name##_luminance_show(struct device *dev, \
1073 struct device_attribute *attr, char *buf) \
1074 { \
1075 struct wacom *wacom = dev_get_drvdata(dev); \
1076 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \
1077 } \
1078 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \
1079 wacom_##name##_luminance_show, \
1080 wacom_##name##_luminance_store)
1081
1082 DEVICE_LUMINANCE_ATTR(status0, llv);
1083 DEVICE_LUMINANCE_ATTR(status1, hlv);
1084 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
1085
1086 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
1087 const char *buf, size_t count)
1088 {
1089 struct hid_device *hdev = to_hid_device(dev);
1090 struct wacom *wacom = hid_get_drvdata(hdev);
1091 int err;
1092 unsigned len;
1093 u8 xfer_id;
1094
1095 if (hdev->bus == BUS_BLUETOOTH) {
1096 len = 256;
1097 xfer_id = WAC_CMD_ICON_BT_XFER;
1098 } else {
1099 len = 1024;
1100 xfer_id = WAC_CMD_ICON_XFER;
1101 }
1102
1103 if (count != len)
1104 return -EINVAL;
1105
1106 mutex_lock(&wacom->lock);
1107
1108 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
1109
1110 mutex_unlock(&wacom->lock);
1111
1112 return err < 0 ? err : count;
1113 }
1114
1115 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
1116 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
1117 struct device_attribute *attr, const char *buf, size_t count) \
1118 { \
1119 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
1120 } \
1121 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \
1122 NULL, wacom_btnimg##BUTTON_ID##_store)
1123
1124 DEVICE_BTNIMG_ATTR(0);
1125 DEVICE_BTNIMG_ATTR(1);
1126 DEVICE_BTNIMG_ATTR(2);
1127 DEVICE_BTNIMG_ATTR(3);
1128 DEVICE_BTNIMG_ATTR(4);
1129 DEVICE_BTNIMG_ATTR(5);
1130 DEVICE_BTNIMG_ATTR(6);
1131 DEVICE_BTNIMG_ATTR(7);
1132
1133 static struct attribute *cintiq_led_attrs[] = {
1134 &dev_attr_status_led0_select.attr,
1135 &dev_attr_status_led1_select.attr,
1136 NULL
1137 };
1138
1139 static struct attribute_group cintiq_led_attr_group = {
1140 .name = "wacom_led",
1141 .attrs = cintiq_led_attrs,
1142 };
1143
1144 static struct attribute *intuos4_led_attrs[] = {
1145 &dev_attr_status0_luminance.attr,
1146 &dev_attr_status1_luminance.attr,
1147 &dev_attr_status_led0_select.attr,
1148 &dev_attr_buttons_luminance.attr,
1149 &dev_attr_button0_rawimg.attr,
1150 &dev_attr_button1_rawimg.attr,
1151 &dev_attr_button2_rawimg.attr,
1152 &dev_attr_button3_rawimg.attr,
1153 &dev_attr_button4_rawimg.attr,
1154 &dev_attr_button5_rawimg.attr,
1155 &dev_attr_button6_rawimg.attr,
1156 &dev_attr_button7_rawimg.attr,
1157 NULL
1158 };
1159
1160 static struct attribute_group intuos4_led_attr_group = {
1161 .name = "wacom_led",
1162 .attrs = intuos4_led_attrs,
1163 };
1164
1165 static struct attribute *intuos5_led_attrs[] = {
1166 &dev_attr_status0_luminance.attr,
1167 &dev_attr_status_led0_select.attr,
1168 NULL
1169 };
1170
1171 static struct attribute_group intuos5_led_attr_group = {
1172 .name = "wacom_led",
1173 .attrs = intuos5_led_attrs,
1174 };
1175
1176 static struct attribute *generic_led_attrs[] = {
1177 &dev_attr_status0_luminance.attr,
1178 &dev_attr_status_led0_select.attr,
1179 NULL
1180 };
1181
1182 static struct attribute_group generic_led_attr_group = {
1183 .name = "wacom_led",
1184 .attrs = generic_led_attrs,
1185 };
1186
1187 struct wacom_sysfs_group_devres {
1188 struct attribute_group *group;
1189 struct kobject *root;
1190 };
1191
1192 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1193 {
1194 struct wacom_sysfs_group_devres *devres = res;
1195 struct kobject *kobj = devres->root;
1196
1197 dev_dbg(dev, "%s: dropping reference to %s\n",
1198 __func__, devres->group->name);
1199 sysfs_remove_group(kobj, devres->group);
1200 }
1201
1202 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1203 struct kobject *root,
1204 struct attribute_group *group)
1205 {
1206 struct wacom_sysfs_group_devres *devres;
1207 int error;
1208
1209 devres = devres_alloc(wacom_devm_sysfs_group_release,
1210 sizeof(struct wacom_sysfs_group_devres),
1211 GFP_KERNEL);
1212 if (!devres)
1213 return -ENOMEM;
1214
1215 devres->group = group;
1216 devres->root = root;
1217
1218 error = sysfs_create_group(devres->root, group);
1219 if (error) {
1220 devres_free(devres);
1221 return error;
1222 }
1223
1224 devres_add(&wacom->hdev->dev, devres);
1225
1226 return 0;
1227 }
1228
1229 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1230 struct attribute_group *group)
1231 {
1232 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1233 group);
1234 }
1235
1236 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1237 {
1238 struct wacom *wacom = led->wacom;
1239
1240 if (wacom->led.max_hlv)
1241 return led->hlv * LED_FULL / wacom->led.max_hlv;
1242
1243 if (wacom->led.max_llv)
1244 return led->llv * LED_FULL / wacom->led.max_llv;
1245
1246 /* device doesn't support brightness tuning */
1247 return LED_FULL;
1248 }
1249
1250 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1251 {
1252 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1253 struct wacom *wacom = led->wacom;
1254
1255 if (wacom->led.groups[led->group].select != led->id)
1256 return LED_OFF;
1257
1258 return wacom_leds_brightness_get(led);
1259 }
1260
1261 static int wacom_led_brightness_set(struct led_classdev *cdev,
1262 enum led_brightness brightness)
1263 {
1264 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1265 struct wacom *wacom = led->wacom;
1266 int error;
1267
1268 mutex_lock(&wacom->lock);
1269
1270 if (!wacom->led.groups || (brightness == LED_OFF &&
1271 wacom->led.groups[led->group].select != led->id)) {
1272 error = 0;
1273 goto out;
1274 }
1275
1276 led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1277 led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1278
1279 wacom->led.groups[led->group].select = led->id;
1280
1281 error = wacom_led_control(wacom);
1282
1283 out:
1284 mutex_unlock(&wacom->lock);
1285
1286 return error;
1287 }
1288
1289 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1290 enum led_brightness brightness)
1291 {
1292 }
1293
1294 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1295 struct wacom_led *led, unsigned int group,
1296 unsigned int id, bool read_only)
1297 {
1298 int error;
1299 char *name;
1300
1301 name = devm_kasprintf(dev, GFP_KERNEL,
1302 "%s::wacom-%d.%d",
1303 dev_name(dev),
1304 group,
1305 id);
1306 if (!name)
1307 return -ENOMEM;
1308
1309 if (!read_only) {
1310 led->trigger.name = name;
1311 error = devm_led_trigger_register(dev, &led->trigger);
1312 if (error) {
1313 hid_err(wacom->hdev,
1314 "failed to register LED trigger %s: %d\n",
1315 led->cdev.name, error);
1316 return error;
1317 }
1318 }
1319
1320 led->group = group;
1321 led->id = id;
1322 led->wacom = wacom;
1323 led->llv = wacom->led.llv;
1324 led->hlv = wacom->led.hlv;
1325 led->cdev.name = name;
1326 led->cdev.max_brightness = LED_FULL;
1327 led->cdev.flags = LED_HW_PLUGGABLE;
1328 led->cdev.brightness_get = __wacom_led_brightness_get;
1329 if (!read_only) {
1330 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1331 led->cdev.default_trigger = led->cdev.name;
1332 } else {
1333 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1334 }
1335
1336 error = devm_led_classdev_register(dev, &led->cdev);
1337 if (error) {
1338 hid_err(wacom->hdev,
1339 "failed to register LED %s: %d\n",
1340 led->cdev.name, error);
1341 led->cdev.name = NULL;
1342 return error;
1343 }
1344
1345 return 0;
1346 }
1347
1348 static void wacom_led_groups_release_one(void *data)
1349 {
1350 struct wacom_group_leds *group = data;
1351
1352 devres_release_group(group->dev, group);
1353 }
1354
1355 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1356 struct wacom *wacom,
1357 int group_id, int count,
1358 bool read_only)
1359 {
1360 struct wacom_led *leds;
1361 int i, error;
1362
1363 if (group_id >= wacom->led.count || count <= 0)
1364 return -EINVAL;
1365
1366 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1367 return -ENOMEM;
1368
1369 leds = devm_kcalloc(dev, count, sizeof(struct wacom_led), GFP_KERNEL);
1370 if (!leds) {
1371 error = -ENOMEM;
1372 goto err;
1373 }
1374
1375 wacom->led.groups[group_id].leds = leds;
1376 wacom->led.groups[group_id].count = count;
1377
1378 for (i = 0; i < count; i++) {
1379 error = wacom_led_register_one(dev, wacom, &leds[i],
1380 group_id, i, read_only);
1381 if (error)
1382 goto err;
1383 }
1384
1385 wacom->led.groups[group_id].dev = dev;
1386
1387 devres_close_group(dev, &wacom->led.groups[group_id]);
1388
1389 /*
1390 * There is a bug (?) in devm_led_classdev_register() in which its
1391 * increments the refcount of the parent. If the parent is an input
1392 * device, that means the ref count never reaches 0 when
1393 * devm_input_device_release() gets called.
1394 * This means that the LEDs are still there after disconnect.
1395 * Manually force the release of the group so that the leds are released
1396 * once we are done using them.
1397 */
1398 error = devm_add_action_or_reset(&wacom->hdev->dev,
1399 wacom_led_groups_release_one,
1400 &wacom->led.groups[group_id]);
1401 if (error)
1402 return error;
1403
1404 return 0;
1405
1406 err:
1407 devres_release_group(dev, &wacom->led.groups[group_id]);
1408 return error;
1409 }
1410
1411 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1412 unsigned int id)
1413 {
1414 struct wacom_group_leds *group;
1415
1416 if (group_id >= wacom->led.count)
1417 return NULL;
1418
1419 group = &wacom->led.groups[group_id];
1420
1421 if (!group->leds)
1422 return NULL;
1423
1424 id %= group->count;
1425
1426 return &group->leds[id];
1427 }
1428
1429 /**
1430 * wacom_led_next: gives the next available led with a wacom trigger.
1431 *
1432 * returns the next available struct wacom_led which has its default trigger
1433 * or the current one if none is available.
1434 */
1435 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1436 {
1437 struct wacom_led *next_led;
1438 int group, next;
1439
1440 if (!wacom || !cur)
1441 return NULL;
1442
1443 group = cur->group;
1444 next = cur->id;
1445
1446 do {
1447 next_led = wacom_led_find(wacom, group, ++next);
1448 if (!next_led || next_led == cur)
1449 return next_led;
1450 } while (next_led->cdev.trigger != &next_led->trigger);
1451
1452 return next_led;
1453 }
1454
1455 static void wacom_led_groups_release(void *data)
1456 {
1457 struct wacom *wacom = data;
1458
1459 wacom->led.groups = NULL;
1460 wacom->led.count = 0;
1461 }
1462
1463 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1464 {
1465 struct device *dev = &wacom->hdev->dev;
1466 struct wacom_group_leds *groups;
1467 int error;
1468
1469 groups = devm_kcalloc(dev, count, sizeof(struct wacom_group_leds),
1470 GFP_KERNEL);
1471 if (!groups)
1472 return -ENOMEM;
1473
1474 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1475 if (error)
1476 return error;
1477
1478 wacom->led.groups = groups;
1479 wacom->led.count = count;
1480
1481 return 0;
1482 }
1483
1484 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1485 int led_per_group, bool read_only)
1486 {
1487 struct device *dev;
1488 int i, error;
1489
1490 if (!wacom->wacom_wac.pad_input)
1491 return -EINVAL;
1492
1493 dev = &wacom->wacom_wac.pad_input->dev;
1494
1495 error = wacom_led_groups_allocate(wacom, group_count);
1496 if (error)
1497 return error;
1498
1499 for (i = 0; i < group_count; i++) {
1500 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1501 led_per_group,
1502 read_only);
1503 if (error)
1504 return error;
1505 }
1506
1507 return 0;
1508 }
1509
1510 int wacom_initialize_leds(struct wacom *wacom)
1511 {
1512 int error;
1513
1514 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1515 return 0;
1516
1517 /* Initialize default values */
1518 switch (wacom->wacom_wac.features.type) {
1519 case HID_GENERIC:
1520 if (!wacom->generic_has_leds)
1521 return 0;
1522 wacom->led.llv = 100;
1523 wacom->led.max_llv = 100;
1524
1525 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1526 if (error) {
1527 hid_err(wacom->hdev,
1528 "cannot create leds err: %d\n", error);
1529 return error;
1530 }
1531
1532 error = wacom_devm_sysfs_create_group(wacom,
1533 &generic_led_attr_group);
1534 break;
1535
1536 case INTUOS4S:
1537 case INTUOS4:
1538 case INTUOS4WL:
1539 case INTUOS4L:
1540 wacom->led.llv = 10;
1541 wacom->led.hlv = 20;
1542 wacom->led.max_llv = 127;
1543 wacom->led.max_hlv = 127;
1544 wacom->led.img_lum = 10;
1545
1546 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1547 if (error) {
1548 hid_err(wacom->hdev,
1549 "cannot create leds err: %d\n", error);
1550 return error;
1551 }
1552
1553 error = wacom_devm_sysfs_create_group(wacom,
1554 &intuos4_led_attr_group);
1555 break;
1556
1557 case WACOM_24HD:
1558 case WACOM_21UX2:
1559 wacom->led.llv = 0;
1560 wacom->led.hlv = 0;
1561 wacom->led.img_lum = 0;
1562
1563 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1564 if (error) {
1565 hid_err(wacom->hdev,
1566 "cannot create leds err: %d\n", error);
1567 return error;
1568 }
1569
1570 error = wacom_devm_sysfs_create_group(wacom,
1571 &cintiq_led_attr_group);
1572 break;
1573
1574 case INTUOS5S:
1575 case INTUOS5:
1576 case INTUOS5L:
1577 case INTUOSPS:
1578 case INTUOSPM:
1579 case INTUOSPL:
1580 wacom->led.llv = 32;
1581 wacom->led.max_llv = 96;
1582
1583 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1584 if (error) {
1585 hid_err(wacom->hdev,
1586 "cannot create leds err: %d\n", error);
1587 return error;
1588 }
1589
1590 error = wacom_devm_sysfs_create_group(wacom,
1591 &intuos5_led_attr_group);
1592 break;
1593
1594 case INTUOSP2_BT:
1595 wacom->led.llv = 50;
1596 wacom->led.max_llv = 100;
1597 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1598 if (error) {
1599 hid_err(wacom->hdev,
1600 "cannot create leds err: %d\n", error);
1601 return error;
1602 }
1603 return 0;
1604
1605 case REMOTE:
1606 wacom->led.llv = 255;
1607 wacom->led.max_llv = 255;
1608 error = wacom_led_groups_allocate(wacom, 5);
1609 if (error) {
1610 hid_err(wacom->hdev,
1611 "cannot create leds err: %d\n", error);
1612 return error;
1613 }
1614 return 0;
1615
1616 default:
1617 return 0;
1618 }
1619
1620 if (error) {
1621 hid_err(wacom->hdev,
1622 "cannot create sysfs group err: %d\n", error);
1623 return error;
1624 }
1625
1626 return 0;
1627 }
1628
1629 static void wacom_init_work(struct work_struct *work)
1630 {
1631 struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1632
1633 _wacom_query_tablet_data(wacom);
1634 wacom_led_control(wacom);
1635 }
1636
1637 static void wacom_query_tablet_data(struct wacom *wacom)
1638 {
1639 schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1640 }
1641
1642 static enum power_supply_property wacom_battery_props[] = {
1643 POWER_SUPPLY_PROP_MODEL_NAME,
1644 POWER_SUPPLY_PROP_PRESENT,
1645 POWER_SUPPLY_PROP_STATUS,
1646 POWER_SUPPLY_PROP_SCOPE,
1647 POWER_SUPPLY_PROP_CAPACITY
1648 };
1649
1650 static int wacom_battery_get_property(struct power_supply *psy,
1651 enum power_supply_property psp,
1652 union power_supply_propval *val)
1653 {
1654 struct wacom_battery *battery = power_supply_get_drvdata(psy);
1655 int ret = 0;
1656
1657 switch (psp) {
1658 case POWER_SUPPLY_PROP_MODEL_NAME:
1659 val->strval = battery->wacom->wacom_wac.name;
1660 break;
1661 case POWER_SUPPLY_PROP_PRESENT:
1662 val->intval = battery->bat_connected;
1663 break;
1664 case POWER_SUPPLY_PROP_SCOPE:
1665 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1666 break;
1667 case POWER_SUPPLY_PROP_CAPACITY:
1668 val->intval = battery->battery_capacity;
1669 break;
1670 case POWER_SUPPLY_PROP_STATUS:
1671 if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
1672 val->intval = battery->bat_status;
1673 else if (battery->bat_charging)
1674 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1675 else if (battery->battery_capacity == 100 &&
1676 battery->ps_connected)
1677 val->intval = POWER_SUPPLY_STATUS_FULL;
1678 else if (battery->ps_connected)
1679 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1680 else
1681 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1682 break;
1683 default:
1684 ret = -EINVAL;
1685 break;
1686 }
1687
1688 return ret;
1689 }
1690
1691 static int __wacom_initialize_battery(struct wacom *wacom,
1692 struct wacom_battery *battery)
1693 {
1694 static atomic_t battery_no = ATOMIC_INIT(0);
1695 struct device *dev = &wacom->hdev->dev;
1696 struct power_supply_config psy_cfg = { .drv_data = battery, };
1697 struct power_supply *ps_bat;
1698 struct power_supply_desc *bat_desc = &battery->bat_desc;
1699 unsigned long n;
1700 int error;
1701
1702 if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1703 return -ENOMEM;
1704
1705 battery->wacom = wacom;
1706
1707 n = atomic_inc_return(&battery_no) - 1;
1708
1709 bat_desc->properties = wacom_battery_props;
1710 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1711 bat_desc->get_property = wacom_battery_get_property;
1712 sprintf(battery->bat_name, "wacom_battery_%ld", n);
1713 bat_desc->name = battery->bat_name;
1714 bat_desc->type = POWER_SUPPLY_TYPE_USB;
1715 bat_desc->use_for_apm = 0;
1716
1717 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1718 if (IS_ERR(ps_bat)) {
1719 error = PTR_ERR(ps_bat);
1720 goto err;
1721 }
1722
1723 power_supply_powers(ps_bat, &wacom->hdev->dev);
1724
1725 battery->battery = ps_bat;
1726
1727 devres_close_group(dev, bat_desc);
1728 return 0;
1729
1730 err:
1731 devres_release_group(dev, bat_desc);
1732 return error;
1733 }
1734
1735 static int wacom_initialize_battery(struct wacom *wacom)
1736 {
1737 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1738 return __wacom_initialize_battery(wacom, &wacom->battery);
1739
1740 return 0;
1741 }
1742
1743 static void wacom_destroy_battery(struct wacom *wacom)
1744 {
1745 if (wacom->battery.battery) {
1746 devres_release_group(&wacom->hdev->dev,
1747 &wacom->battery.bat_desc);
1748 wacom->battery.battery = NULL;
1749 }
1750 }
1751
1752 static ssize_t wacom_show_speed(struct device *dev,
1753 struct device_attribute
1754 *attr, char *buf)
1755 {
1756 struct hid_device *hdev = to_hid_device(dev);
1757 struct wacom *wacom = hid_get_drvdata(hdev);
1758
1759 return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1760 }
1761
1762 static ssize_t wacom_store_speed(struct device *dev,
1763 struct device_attribute *attr,
1764 const char *buf, size_t count)
1765 {
1766 struct hid_device *hdev = to_hid_device(dev);
1767 struct wacom *wacom = hid_get_drvdata(hdev);
1768 u8 new_speed;
1769
1770 if (kstrtou8(buf, 0, &new_speed))
1771 return -EINVAL;
1772
1773 if (new_speed != 0 && new_speed != 1)
1774 return -EINVAL;
1775
1776 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1777
1778 return count;
1779 }
1780
1781 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1782 wacom_show_speed, wacom_store_speed);
1783
1784
1785 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1786 struct kobj_attribute *kattr,
1787 char *buf, int index)
1788 {
1789 struct device *dev = kobj_to_dev(kobj->parent);
1790 struct hid_device *hdev = to_hid_device(dev);
1791 struct wacom *wacom = hid_get_drvdata(hdev);
1792 u8 mode;
1793
1794 mode = wacom->led.groups[index].select;
1795 return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
1796 }
1797
1798 #define DEVICE_EKR_ATTR_GROUP(SET_ID) \
1799 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \
1800 struct kobj_attribute *kattr, char *buf) \
1801 { \
1802 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \
1803 } \
1804 static struct kobj_attribute remote##SET_ID##_mode_attr = { \
1805 .attr = {.name = "remote_mode", \
1806 .mode = DEV_ATTR_RO_PERM}, \
1807 .show = wacom_show_remote##SET_ID##_mode, \
1808 }; \
1809 static struct attribute *remote##SET_ID##_serial_attrs[] = { \
1810 &remote##SET_ID##_mode_attr.attr, \
1811 NULL \
1812 }; \
1813 static struct attribute_group remote##SET_ID##_serial_group = { \
1814 .name = NULL, \
1815 .attrs = remote##SET_ID##_serial_attrs, \
1816 }
1817
1818 DEVICE_EKR_ATTR_GROUP(0);
1819 DEVICE_EKR_ATTR_GROUP(1);
1820 DEVICE_EKR_ATTR_GROUP(2);
1821 DEVICE_EKR_ATTR_GROUP(3);
1822 DEVICE_EKR_ATTR_GROUP(4);
1823
1824 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1825 int index)
1826 {
1827 int error = 0;
1828 struct wacom_remote *remote = wacom->remote;
1829
1830 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1831 GFP_KERNEL,
1832 "%d", serial);
1833 if (!remote->remotes[index].group.name)
1834 return -ENOMEM;
1835
1836 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1837 &remote->remotes[index].group);
1838 if (error) {
1839 remote->remotes[index].group.name = NULL;
1840 hid_err(wacom->hdev,
1841 "cannot create sysfs group err: %d\n", error);
1842 return error;
1843 }
1844
1845 return 0;
1846 }
1847
1848 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1849 {
1850 const size_t buf_size = 2;
1851 unsigned char *buf;
1852 int retval;
1853
1854 buf = kzalloc(buf_size, GFP_KERNEL);
1855 if (!buf)
1856 return -ENOMEM;
1857
1858 buf[0] = WAC_CMD_DELETE_PAIRING;
1859 buf[1] = selector;
1860
1861 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1862 buf_size, WAC_CMD_RETRIES);
1863 kfree(buf);
1864
1865 return retval;
1866 }
1867
1868 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1869 struct kobj_attribute *attr,
1870 const char *buf, size_t count)
1871 {
1872 unsigned char selector = 0;
1873 struct device *dev = kobj_to_dev(kobj->parent);
1874 struct hid_device *hdev = to_hid_device(dev);
1875 struct wacom *wacom = hid_get_drvdata(hdev);
1876 int err;
1877
1878 if (!strncmp(buf, "*\n", 2)) {
1879 selector = WAC_CMD_UNPAIR_ALL;
1880 } else {
1881 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1882 buf);
1883 return -1;
1884 }
1885
1886 mutex_lock(&wacom->lock);
1887
1888 err = wacom_cmd_unpair_remote(wacom, selector);
1889 mutex_unlock(&wacom->lock);
1890
1891 return err < 0 ? err : count;
1892 }
1893
1894 static struct kobj_attribute unpair_remote_attr = {
1895 .attr = {.name = "unpair_remote", .mode = 0200},
1896 .store = wacom_store_unpair_remote,
1897 };
1898
1899 static const struct attribute *remote_unpair_attrs[] = {
1900 &unpair_remote_attr.attr,
1901 NULL
1902 };
1903
1904 static void wacom_remotes_destroy(void *data)
1905 {
1906 struct wacom *wacom = data;
1907 struct wacom_remote *remote = wacom->remote;
1908
1909 if (!remote)
1910 return;
1911
1912 kobject_put(remote->remote_dir);
1913 kfifo_free(&remote->remote_fifo);
1914 wacom->remote = NULL;
1915 }
1916
1917 static int wacom_initialize_remotes(struct wacom *wacom)
1918 {
1919 int error = 0;
1920 struct wacom_remote *remote;
1921 int i;
1922
1923 if (wacom->wacom_wac.features.type != REMOTE)
1924 return 0;
1925
1926 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1927 GFP_KERNEL);
1928 if (!remote)
1929 return -ENOMEM;
1930
1931 wacom->remote = remote;
1932
1933 spin_lock_init(&remote->remote_lock);
1934
1935 error = kfifo_alloc(&remote->remote_fifo,
1936 5 * sizeof(struct wacom_remote_data),
1937 GFP_KERNEL);
1938 if (error) {
1939 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1940 return -ENOMEM;
1941 }
1942
1943 remote->remotes[0].group = remote0_serial_group;
1944 remote->remotes[1].group = remote1_serial_group;
1945 remote->remotes[2].group = remote2_serial_group;
1946 remote->remotes[3].group = remote3_serial_group;
1947 remote->remotes[4].group = remote4_serial_group;
1948
1949 remote->remote_dir = kobject_create_and_add("wacom_remote",
1950 &wacom->hdev->dev.kobj);
1951 if (!remote->remote_dir)
1952 return -ENOMEM;
1953
1954 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1955
1956 if (error) {
1957 hid_err(wacom->hdev,
1958 "cannot create sysfs group err: %d\n", error);
1959 return error;
1960 }
1961
1962 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1963 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1964 remote->remotes[i].serial = 0;
1965 }
1966
1967 error = devm_add_action_or_reset(&wacom->hdev->dev,
1968 wacom_remotes_destroy, wacom);
1969 if (error)
1970 return error;
1971
1972 return 0;
1973 }
1974
1975 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1976 {
1977 struct input_dev *input_dev;
1978 struct hid_device *hdev = wacom->hdev;
1979 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1980
1981 input_dev = devm_input_allocate_device(&hdev->dev);
1982 if (!input_dev)
1983 return NULL;
1984
1985 input_dev->name = wacom_wac->features.name;
1986 input_dev->phys = hdev->phys;
1987 input_dev->dev.parent = &hdev->dev;
1988 input_dev->open = wacom_open;
1989 input_dev->close = wacom_close;
1990 input_dev->uniq = hdev->uniq;
1991 input_dev->id.bustype = hdev->bus;
1992 input_dev->id.vendor = hdev->vendor;
1993 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1994 input_dev->id.version = hdev->version;
1995 input_set_drvdata(input_dev, wacom);
1996
1997 return input_dev;
1998 }
1999
2000 static int wacom_allocate_inputs(struct wacom *wacom)
2001 {
2002 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2003
2004 wacom_wac->pen_input = wacom_allocate_input(wacom);
2005 wacom_wac->touch_input = wacom_allocate_input(wacom);
2006 wacom_wac->pad_input = wacom_allocate_input(wacom);
2007 if (!wacom_wac->pen_input ||
2008 !wacom_wac->touch_input ||
2009 !wacom_wac->pad_input)
2010 return -ENOMEM;
2011
2012 wacom_wac->pen_input->name = wacom_wac->pen_name;
2013 wacom_wac->touch_input->name = wacom_wac->touch_name;
2014 wacom_wac->pad_input->name = wacom_wac->pad_name;
2015
2016 return 0;
2017 }
2018
2019 static int wacom_register_inputs(struct wacom *wacom)
2020 {
2021 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
2022 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2023 int error = 0;
2024
2025 pen_input_dev = wacom_wac->pen_input;
2026 touch_input_dev = wacom_wac->touch_input;
2027 pad_input_dev = wacom_wac->pad_input;
2028
2029 if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
2030 return -EINVAL;
2031
2032 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
2033 if (error) {
2034 /* no pen in use on this interface */
2035 input_free_device(pen_input_dev);
2036 wacom_wac->pen_input = NULL;
2037 pen_input_dev = NULL;
2038 } else {
2039 error = input_register_device(pen_input_dev);
2040 if (error)
2041 goto fail;
2042 }
2043
2044 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
2045 if (error) {
2046 /* no touch in use on this interface */
2047 input_free_device(touch_input_dev);
2048 wacom_wac->touch_input = NULL;
2049 touch_input_dev = NULL;
2050 } else {
2051 error = input_register_device(touch_input_dev);
2052 if (error)
2053 goto fail;
2054 }
2055
2056 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
2057 if (error) {
2058 /* no pad in use on this interface */
2059 input_free_device(pad_input_dev);
2060 wacom_wac->pad_input = NULL;
2061 pad_input_dev = NULL;
2062 } else {
2063 error = input_register_device(pad_input_dev);
2064 if (error)
2065 goto fail;
2066 }
2067
2068 return 0;
2069
2070 fail:
2071 wacom_wac->pad_input = NULL;
2072 wacom_wac->touch_input = NULL;
2073 wacom_wac->pen_input = NULL;
2074 return error;
2075 }
2076
2077 /*
2078 * Not all devices report physical dimensions from HID.
2079 * Compute the default from hardcoded logical dimension
2080 * and resolution before driver overwrites them.
2081 */
2082 static void wacom_set_default_phy(struct wacom_features *features)
2083 {
2084 if (features->x_resolution) {
2085 features->x_phy = (features->x_max * 100) /
2086 features->x_resolution;
2087 features->y_phy = (features->y_max * 100) /
2088 features->y_resolution;
2089 }
2090 }
2091
2092 static void wacom_calculate_res(struct wacom_features *features)
2093 {
2094 /* set unit to "100th of a mm" for devices not reported by HID */
2095 if (!features->unit) {
2096 features->unit = 0x11;
2097 features->unitExpo = -3;
2098 }
2099
2100 features->x_resolution = wacom_calc_hid_res(features->x_max,
2101 features->x_phy,
2102 features->unit,
2103 features->unitExpo);
2104 features->y_resolution = wacom_calc_hid_res(features->y_max,
2105 features->y_phy,
2106 features->unit,
2107 features->unitExpo);
2108 }
2109
2110 void wacom_battery_work(struct work_struct *work)
2111 {
2112 struct wacom *wacom = container_of(work, struct wacom, battery_work);
2113
2114 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2115 !wacom->battery.battery) {
2116 wacom_initialize_battery(wacom);
2117 }
2118 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2119 wacom->battery.battery) {
2120 wacom_destroy_battery(wacom);
2121 }
2122 }
2123
2124 static size_t wacom_compute_pktlen(struct hid_device *hdev)
2125 {
2126 struct hid_report_enum *report_enum;
2127 struct hid_report *report;
2128 size_t size = 0;
2129
2130 report_enum = hdev->report_enum + HID_INPUT_REPORT;
2131
2132 list_for_each_entry(report, &report_enum->report_list, list) {
2133 size_t report_size = hid_report_len(report);
2134 if (report_size > size)
2135 size = report_size;
2136 }
2137
2138 return size;
2139 }
2140
2141 static void wacom_update_name(struct wacom *wacom, const char *suffix)
2142 {
2143 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2144 struct wacom_features *features = &wacom_wac->features;
2145 char name[WACOM_NAME_MAX];
2146
2147 /* Generic devices name unspecified */
2148 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2149 char *product_name = wacom->hdev->name;
2150
2151 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
2152 struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
2153 struct usb_device *dev = interface_to_usbdev(intf);
2154 product_name = dev->product;
2155 }
2156
2157 if (wacom->hdev->bus == BUS_I2C) {
2158 snprintf(name, sizeof(name), "%s %X",
2159 features->name, wacom->hdev->product);
2160 } else if (strstr(product_name, "Wacom") ||
2161 strstr(product_name, "wacom") ||
2162 strstr(product_name, "WACOM")) {
2163 strlcpy(name, product_name, sizeof(name));
2164 } else {
2165 snprintf(name, sizeof(name), "Wacom %s", product_name);
2166 }
2167
2168 /* strip out excess whitespaces */
2169 while (1) {
2170 char *gap = strstr(name, " ");
2171 if (gap == NULL)
2172 break;
2173 /* shift everything including the terminator */
2174 memmove(gap, gap+1, strlen(gap));
2175 }
2176
2177 /* get rid of trailing whitespace */
2178 if (name[strlen(name)-1] == ' ')
2179 name[strlen(name)-1] = '\0';
2180 } else {
2181 strlcpy(name, features->name, sizeof(name));
2182 }
2183
2184 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2185 name, suffix);
2186
2187 /* Append the device type to the name */
2188 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
2189 "%s%s Pen", name, suffix);
2190 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
2191 "%s%s Finger", name, suffix);
2192 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
2193 "%s%s Pad", name, suffix);
2194 }
2195
2196 static void wacom_release_resources(struct wacom *wacom)
2197 {
2198 struct hid_device *hdev = wacom->hdev;
2199
2200 if (!wacom->resources)
2201 return;
2202
2203 devres_release_group(&hdev->dev, wacom);
2204
2205 wacom->resources = false;
2206
2207 wacom->wacom_wac.pen_input = NULL;
2208 wacom->wacom_wac.touch_input = NULL;
2209 wacom->wacom_wac.pad_input = NULL;
2210 }
2211
2212 static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
2213 {
2214 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
2215 wacom_wac->shared->type = wacom_wac->features.type;
2216 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2217 }
2218
2219 if (wacom_wac->has_mute_touch_switch) {
2220 wacom_wac->shared->has_mute_touch_switch = true;
2221 wacom_wac->shared->is_touch_on = true;
2222 }
2223
2224 if (wacom_wac->shared->has_mute_touch_switch &&
2225 wacom_wac->shared->touch_input) {
2226 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
2227 input_set_capability(wacom_wac->shared->touch_input, EV_SW,
2228 SW_MUTE_DEVICE);
2229 }
2230 }
2231
2232 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2233 {
2234 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2235 struct wacom_features *features = &wacom_wac->features;
2236 struct hid_device *hdev = wacom->hdev;
2237 int error;
2238 unsigned int connect_mask = HID_CONNECT_HIDRAW;
2239
2240 features->pktlen = wacom_compute_pktlen(hdev);
2241 if (features->pktlen > WACOM_PKGLEN_MAX)
2242 return -EINVAL;
2243
2244 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2245 return -ENOMEM;
2246
2247 wacom->resources = true;
2248
2249 error = wacom_allocate_inputs(wacom);
2250 if (error)
2251 goto fail;
2252
2253 /*
2254 * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2255 * into debug mode for the touch part.
2256 * We ignore the other interfaces.
2257 */
2258 if (features->type == BAMBOO_PAD) {
2259 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2260 features->type = HID_GENERIC;
2261 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2262 (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2263 error = -ENODEV;
2264 goto fail;
2265 }
2266 }
2267
2268 /* set the default size in case we do not get them from hid */
2269 wacom_set_default_phy(features);
2270
2271 /* Retrieve the physical and logical size for touch devices */
2272 wacom_retrieve_hid_descriptor(hdev, features);
2273 wacom_setup_device_quirks(wacom);
2274
2275 if (features->device_type == WACOM_DEVICETYPE_NONE &&
2276 features->type != WIRELESS) {
2277 error = features->type == HID_GENERIC ? -ENODEV : 0;
2278
2279 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2280 hdev->name,
2281 error ? "Ignoring" : "Assuming pen");
2282
2283 if (error)
2284 goto fail;
2285
2286 features->device_type |= WACOM_DEVICETYPE_PEN;
2287 }
2288
2289 wacom_calculate_res(features);
2290
2291 wacom_update_name(wacom, wireless ? " (WL)" : "");
2292
2293 /* pen only Bamboo neither support touch nor pad */
2294 if ((features->type == BAMBOO_PEN) &&
2295 ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2296 (features->device_type & WACOM_DEVICETYPE_PAD))) {
2297 error = -ENODEV;
2298 goto fail;
2299 }
2300
2301 error = wacom_add_shared_data(hdev);
2302 if (error)
2303 goto fail;
2304
2305 if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2306 (features->quirks & WACOM_QUIRK_BATTERY)) {
2307 error = wacom_initialize_battery(wacom);
2308 if (error)
2309 goto fail;
2310 }
2311
2312 error = wacom_register_inputs(wacom);
2313 if (error)
2314 goto fail;
2315
2316 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2317 error = wacom_initialize_leds(wacom);
2318 if (error)
2319 goto fail;
2320
2321 error = wacom_initialize_remotes(wacom);
2322 if (error)
2323 goto fail;
2324 }
2325
2326 if (features->type == HID_GENERIC)
2327 connect_mask |= HID_CONNECT_DRIVER;
2328
2329 /* Regular HID work starts now */
2330 error = hid_hw_start(hdev, connect_mask);
2331 if (error) {
2332 hid_err(hdev, "hw start failed\n");
2333 goto fail;
2334 }
2335
2336 if (!wireless) {
2337 /* Note that if query fails it is not a hard failure */
2338 wacom_query_tablet_data(wacom);
2339 }
2340
2341 /* touch only Bamboo doesn't support pen */
2342 if ((features->type == BAMBOO_TOUCH) &&
2343 (features->device_type & WACOM_DEVICETYPE_PEN)) {
2344 cancel_delayed_work_sync(&wacom->init_work);
2345 _wacom_query_tablet_data(wacom);
2346 error = -ENODEV;
2347 goto fail_quirks;
2348 }
2349
2350 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2351 error = hid_hw_open(hdev);
2352
2353 wacom_set_shared_values(wacom_wac);
2354 devres_close_group(&hdev->dev, wacom);
2355
2356 return 0;
2357
2358 fail_quirks:
2359 hid_hw_stop(hdev);
2360 fail:
2361 wacom_release_resources(wacom);
2362 return error;
2363 }
2364
2365 static void wacom_wireless_work(struct work_struct *work)
2366 {
2367 struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2368 struct usb_device *usbdev = wacom->usbdev;
2369 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2370 struct hid_device *hdev1, *hdev2;
2371 struct wacom *wacom1, *wacom2;
2372 struct wacom_wac *wacom_wac1, *wacom_wac2;
2373 int error;
2374
2375 /*
2376 * Regardless if this is a disconnect or a new tablet,
2377 * remove any existing input and battery devices.
2378 */
2379
2380 wacom_destroy_battery(wacom);
2381
2382 /* Stylus interface */
2383 hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2384 wacom1 = hid_get_drvdata(hdev1);
2385 wacom_wac1 = &(wacom1->wacom_wac);
2386 wacom_release_resources(wacom1);
2387
2388 /* Touch interface */
2389 hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2390 wacom2 = hid_get_drvdata(hdev2);
2391 wacom_wac2 = &(wacom2->wacom_wac);
2392 wacom_release_resources(wacom2);
2393
2394 if (wacom_wac->pid == 0) {
2395 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2396 } else {
2397 const struct hid_device_id *id = wacom_ids;
2398
2399 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2400 wacom_wac->pid);
2401
2402 while (id->bus) {
2403 if (id->vendor == USB_VENDOR_ID_WACOM &&
2404 id->product == wacom_wac->pid)
2405 break;
2406 id++;
2407 }
2408
2409 if (!id->bus) {
2410 hid_info(wacom->hdev, "ignoring unknown PID.\n");
2411 return;
2412 }
2413
2414 /* Stylus interface */
2415 wacom_wac1->features =
2416 *((struct wacom_features *)id->driver_data);
2417
2418 wacom_wac1->pid = wacom_wac->pid;
2419 hid_hw_stop(hdev1);
2420 error = wacom_parse_and_register(wacom1, true);
2421 if (error)
2422 goto fail;
2423
2424 /* Touch interface */
2425 if (wacom_wac1->features.touch_max ||
2426 (wacom_wac1->features.type >= INTUOSHT &&
2427 wacom_wac1->features.type <= BAMBOO_PT)) {
2428 wacom_wac2->features =
2429 *((struct wacom_features *)id->driver_data);
2430 wacom_wac2->pid = wacom_wac->pid;
2431 hid_hw_stop(hdev2);
2432 error = wacom_parse_and_register(wacom2, true);
2433 if (error)
2434 goto fail;
2435 }
2436
2437 strlcpy(wacom_wac->name, wacom_wac1->name,
2438 sizeof(wacom_wac->name));
2439 error = wacom_initialize_battery(wacom);
2440 if (error)
2441 goto fail;
2442 }
2443
2444 return;
2445
2446 fail:
2447 wacom_release_resources(wacom1);
2448 wacom_release_resources(wacom2);
2449 return;
2450 }
2451
2452 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2453 {
2454 struct wacom_remote *remote = wacom->remote;
2455 u32 serial = remote->remotes[index].serial;
2456 int i;
2457 unsigned long flags;
2458
2459 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2460 if (remote->remotes[i].serial == serial) {
2461
2462 spin_lock_irqsave(&remote->remote_lock, flags);
2463 remote->remotes[i].registered = false;
2464 spin_unlock_irqrestore(&remote->remote_lock, flags);
2465
2466 if (remote->remotes[i].battery.battery)
2467 devres_release_group(&wacom->hdev->dev,
2468 &remote->remotes[i].battery.bat_desc);
2469
2470 if (remote->remotes[i].group.name)
2471 devres_release_group(&wacom->hdev->dev,
2472 &remote->remotes[i]);
2473
2474 remote->remotes[i].serial = 0;
2475 remote->remotes[i].group.name = NULL;
2476 remote->remotes[i].battery.battery = NULL;
2477 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2478 }
2479 }
2480 }
2481
2482 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2483 unsigned int index)
2484 {
2485 struct wacom_remote *remote = wacom->remote;
2486 struct device *dev = &wacom->hdev->dev;
2487 int error, k;
2488
2489 /* A remote can pair more than once with an EKR,
2490 * check to make sure this serial isn't already paired.
2491 */
2492 for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2493 if (remote->remotes[k].serial == serial)
2494 break;
2495 }
2496
2497 if (k < WACOM_MAX_REMOTES) {
2498 remote->remotes[index].serial = serial;
2499 return 0;
2500 }
2501
2502 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2503 return -ENOMEM;
2504
2505 error = wacom_remote_create_attr_group(wacom, serial, index);
2506 if (error)
2507 goto fail;
2508
2509 remote->remotes[index].input = wacom_allocate_input(wacom);
2510 if (!remote->remotes[index].input) {
2511 error = -ENOMEM;
2512 goto fail;
2513 }
2514 remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2515 remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2516
2517 if (!remote->remotes[index].input->name) {
2518 error = -EINVAL;
2519 goto fail;
2520 }
2521
2522 error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2523 &wacom->wacom_wac);
2524 if (error)
2525 goto fail;
2526
2527 remote->remotes[index].serial = serial;
2528
2529 error = input_register_device(remote->remotes[index].input);
2530 if (error)
2531 goto fail;
2532
2533 error = wacom_led_groups_alloc_and_register_one(
2534 &remote->remotes[index].input->dev,
2535 wacom, index, 3, true);
2536 if (error)
2537 goto fail;
2538
2539 remote->remotes[index].registered = true;
2540
2541 devres_close_group(dev, &remote->remotes[index]);
2542 return 0;
2543
2544 fail:
2545 devres_release_group(dev, &remote->remotes[index]);
2546 remote->remotes[index].serial = 0;
2547 return error;
2548 }
2549
2550 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2551 {
2552 struct wacom_remote *remote = wacom->remote;
2553 int error;
2554
2555 if (!remote->remotes[index].registered)
2556 return 0;
2557
2558 if (remote->remotes[index].battery.battery)
2559 return 0;
2560
2561 if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2562 return 0;
2563
2564 error = __wacom_initialize_battery(wacom,
2565 &wacom->remote->remotes[index].battery);
2566 if (error)
2567 return error;
2568
2569 return 0;
2570 }
2571
2572 static void wacom_remote_work(struct work_struct *work)
2573 {
2574 struct wacom *wacom = container_of(work, struct wacom, remote_work);
2575 struct wacom_remote *remote = wacom->remote;
2576 struct wacom_remote_data data;
2577 unsigned long flags;
2578 unsigned int count;
2579 u32 serial;
2580 int i;
2581
2582 spin_lock_irqsave(&remote->remote_lock, flags);
2583
2584 count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2585
2586 if (count != sizeof(data)) {
2587 hid_err(wacom->hdev,
2588 "workitem triggered without status available\n");
2589 spin_unlock_irqrestore(&remote->remote_lock, flags);
2590 return;
2591 }
2592
2593 if (!kfifo_is_empty(&remote->remote_fifo))
2594 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2595
2596 spin_unlock_irqrestore(&remote->remote_lock, flags);
2597
2598 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2599 serial = data.remote[i].serial;
2600 if (data.remote[i].connected) {
2601
2602 if (remote->remotes[i].serial == serial) {
2603 wacom_remote_attach_battery(wacom, i);
2604 continue;
2605 }
2606
2607 if (remote->remotes[i].serial)
2608 wacom_remote_destroy_one(wacom, i);
2609
2610 wacom_remote_create_one(wacom, serial, i);
2611
2612 } else if (remote->remotes[i].serial) {
2613 wacom_remote_destroy_one(wacom, i);
2614 }
2615 }
2616 }
2617
2618 static void wacom_mode_change_work(struct work_struct *work)
2619 {
2620 struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
2621 struct wacom_shared *shared = wacom->wacom_wac.shared;
2622 struct wacom *wacom1 = NULL;
2623 struct wacom *wacom2 = NULL;
2624 bool is_direct = wacom->wacom_wac.is_direct_mode;
2625 int error = 0;
2626
2627 if (shared->pen) {
2628 wacom1 = hid_get_drvdata(shared->pen);
2629 wacom_release_resources(wacom1);
2630 hid_hw_stop(wacom1->hdev);
2631 wacom1->wacom_wac.has_mode_change = true;
2632 wacom1->wacom_wac.is_direct_mode = is_direct;
2633 }
2634
2635 if (shared->touch) {
2636 wacom2 = hid_get_drvdata(shared->touch);
2637 wacom_release_resources(wacom2);
2638 hid_hw_stop(wacom2->hdev);
2639 wacom2->wacom_wac.has_mode_change = true;
2640 wacom2->wacom_wac.is_direct_mode = is_direct;
2641 }
2642
2643 if (wacom1) {
2644 error = wacom_parse_and_register(wacom1, false);
2645 if (error)
2646 return;
2647 }
2648
2649 if (wacom2) {
2650 error = wacom_parse_and_register(wacom2, false);
2651 if (error)
2652 return;
2653 }
2654
2655 return;
2656 }
2657
2658 static int wacom_probe(struct hid_device *hdev,
2659 const struct hid_device_id *id)
2660 {
2661 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2662 struct usb_device *dev = interface_to_usbdev(intf);
2663 struct wacom *wacom;
2664 struct wacom_wac *wacom_wac;
2665 struct wacom_features *features;
2666 int error;
2667
2668 if (!id->driver_data)
2669 return -EINVAL;
2670
2671 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2672
2673 /* hid-core sets this quirk for the boot interface */
2674 hdev->quirks &= ~HID_QUIRK_NOGET;
2675
2676 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2677 if (!wacom)
2678 return -ENOMEM;
2679
2680 hid_set_drvdata(hdev, wacom);
2681 wacom->hdev = hdev;
2682
2683 wacom_wac = &wacom->wacom_wac;
2684 wacom_wac->features = *((struct wacom_features *)id->driver_data);
2685 features = &wacom_wac->features;
2686
2687 if (features->check_for_hid_type && features->hid_type != hdev->type) {
2688 error = -ENODEV;
2689 goto fail;
2690 }
2691
2692 error = kfifo_alloc(&wacom_wac->pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL);
2693 if (error)
2694 goto fail;
2695
2696 wacom_wac->hid_data.inputmode = -1;
2697 wacom_wac->mode_report = -1;
2698
2699 wacom->usbdev = dev;
2700 wacom->intf = intf;
2701 mutex_init(&wacom->lock);
2702 INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
2703 INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2704 INIT_WORK(&wacom->battery_work, wacom_battery_work);
2705 INIT_WORK(&wacom->remote_work, wacom_remote_work);
2706 INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
2707
2708 /* ask for the report descriptor to be loaded by HID */
2709 error = hid_parse(hdev);
2710 if (error) {
2711 hid_err(hdev, "parse failed\n");
2712 goto fail;
2713 }
2714
2715 error = wacom_parse_and_register(wacom, false);
2716 if (error)
2717 goto fail;
2718
2719 if (hdev->bus == BUS_BLUETOOTH) {
2720 error = device_create_file(&hdev->dev, &dev_attr_speed);
2721 if (error)
2722 hid_warn(hdev,
2723 "can't create sysfs speed attribute err: %d\n",
2724 error);
2725 }
2726
2727 return 0;
2728
2729 fail:
2730 hid_set_drvdata(hdev, NULL);
2731 return error;
2732 }
2733
2734 static void wacom_remove(struct hid_device *hdev)
2735 {
2736 struct wacom *wacom = hid_get_drvdata(hdev);
2737 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2738 struct wacom_features *features = &wacom_wac->features;
2739
2740 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2741 hid_hw_close(hdev);
2742
2743 hid_hw_stop(hdev);
2744
2745 cancel_delayed_work_sync(&wacom->init_work);
2746 cancel_work_sync(&wacom->wireless_work);
2747 cancel_work_sync(&wacom->battery_work);
2748 cancel_work_sync(&wacom->remote_work);
2749 cancel_work_sync(&wacom->mode_change_work);
2750 if (hdev->bus == BUS_BLUETOOTH)
2751 device_remove_file(&hdev->dev, &dev_attr_speed);
2752
2753 /* make sure we don't trigger the LEDs */
2754 wacom_led_groups_release(wacom);
2755
2756 if (wacom->wacom_wac.features.type != REMOTE)
2757 wacom_release_resources(wacom);
2758
2759 kfifo_free(&wacom_wac->pen_fifo);
2760
2761 hid_set_drvdata(hdev, NULL);
2762 }
2763
2764 #ifdef CONFIG_PM
2765 static int wacom_resume(struct hid_device *hdev)
2766 {
2767 struct wacom *wacom = hid_get_drvdata(hdev);
2768
2769 mutex_lock(&wacom->lock);
2770
2771 /* switch to wacom mode first */
2772 _wacom_query_tablet_data(wacom);
2773 wacom_led_control(wacom);
2774
2775 mutex_unlock(&wacom->lock);
2776
2777 return 0;
2778 }
2779
2780 static int wacom_reset_resume(struct hid_device *hdev)
2781 {
2782 return wacom_resume(hdev);
2783 }
2784 #endif /* CONFIG_PM */
2785
2786 static struct hid_driver wacom_driver = {
2787 .name = "wacom",
2788 .id_table = wacom_ids,
2789 .probe = wacom_probe,
2790 .remove = wacom_remove,
2791 .report = wacom_wac_report,
2792 #ifdef CONFIG_PM
2793 .resume = wacom_resume,
2794 .reset_resume = wacom_reset_resume,
2795 #endif
2796 .raw_event = wacom_raw_event,
2797 };
2798 module_hid_driver(wacom_driver);
2799
2800 MODULE_VERSION(DRIVER_VERSION);
2801 MODULE_AUTHOR(DRIVER_AUTHOR);
2802 MODULE_DESCRIPTION(DRIVER_DESC);
2803 MODULE_LICENSE("GPL");
Linux with added FPC-III support