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WIP FPC-III support
[linux/fpc-iii.git] / drivers / hid / wacom_sys.c
blob045c464228d91f6a9bb8cba52fc5360ec7331013
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * drivers/input/tablet/wacom_sys.c
4 *
5 * USB Wacom tablet support - system specific code
6 */
7
8 /*
9 */
10
11 #include "wacom_wac.h"
12 #include "wacom.h"
13 #include <linux/input/mt.h>
14
15 #define WAC_MSG_RETRIES 5
16 #define WAC_CMD_RETRIES 10
17
18 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
19 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
20 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
21
22 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
23 size_t size, unsigned int retries)
24 {
25 int retval;
26
27 do {
28 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
29 HID_REQ_GET_REPORT);
30 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
31
32 if (retval < 0)
33 hid_err(hdev, "wacom_get_report: ran out of retries "
34 "(last error = %d)\n", retval);
35
36 return retval;
37 }
38
39 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
40 size_t size, unsigned int retries)
41 {
42 int retval;
43
44 do {
45 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
46 HID_REQ_SET_REPORT);
47 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
48
49 if (retval < 0)
50 hid_err(hdev, "wacom_set_report: ran out of retries "
51 "(last error = %d)\n", retval);
52
53 return retval;
54 }
55
56 static void wacom_wac_queue_insert(struct hid_device *hdev,
57 struct kfifo_rec_ptr_2 *fifo,
58 u8 *raw_data, int size)
59 {
60 bool warned = false;
61
62 while (kfifo_avail(fifo) < size) {
63 if (!warned)
64 hid_warn(hdev, "%s: kfifo has filled, starting to drop events\n", __func__);
65 warned = true;
66
67 kfifo_skip(fifo);
68 }
69
70 kfifo_in(fifo, raw_data, size);
71 }
72
73 static void wacom_wac_queue_flush(struct hid_device *hdev,
74 struct kfifo_rec_ptr_2 *fifo)
75 {
76 while (!kfifo_is_empty(fifo)) {
77 u8 buf[WACOM_PKGLEN_MAX];
78 int size;
79 int err;
80
81 size = kfifo_out(fifo, buf, sizeof(buf));
82 err = hid_report_raw_event(hdev, HID_INPUT_REPORT, buf, size, false);
83 if (err) {
84 hid_warn(hdev, "%s: unable to flush event due to error %d\n",
85 __func__, err);
86 }
87 }
88 }
89
90 static int wacom_wac_pen_serial_enforce(struct hid_device *hdev,
91 struct hid_report *report, u8 *raw_data, int report_size)
92 {
93 struct wacom *wacom = hid_get_drvdata(hdev);
94 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
95 struct wacom_features *features = &wacom_wac->features;
96 bool flush = false;
97 bool insert = false;
98 int i, j;
99
100 if (wacom_wac->serial[0] || !(features->quirks & WACOM_QUIRK_TOOLSERIAL))
101 return 0;
102
103 /* Queue events which have invalid tool type or serial number */
104 for (i = 0; i < report->maxfield; i++) {
105 for (j = 0; j < report->field[i]->maxusage; j++) {
106 struct hid_field *field = report->field[i];
107 struct hid_usage *usage = &field->usage[j];
108 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
109 unsigned int offset;
110 unsigned int size;
111 unsigned int value;
112
113 if (equivalent_usage != HID_DG_INRANGE &&
114 equivalent_usage != HID_DG_TOOLSERIALNUMBER &&
115 equivalent_usage != WACOM_HID_WD_SERIALHI &&
116 equivalent_usage != WACOM_HID_WD_TOOLTYPE)
117 continue;
118
119 offset = field->report_offset;
120 size = field->report_size;
121 value = hid_field_extract(hdev, raw_data+1, offset + j * size, size);
122
123 /* If we go out of range, we need to flush the queue ASAP */
124 if (equivalent_usage == HID_DG_INRANGE)
125 value = !value;
126
127 if (value) {
128 flush = true;
129 switch (equivalent_usage) {
130 case HID_DG_TOOLSERIALNUMBER:
131 wacom_wac->serial[0] = value;
132 break;
133
134 case WACOM_HID_WD_SERIALHI:
135 wacom_wac->serial[0] |= ((__u64)value) << 32;
136 break;
137
138 case WACOM_HID_WD_TOOLTYPE:
139 wacom_wac->id[0] = value;
140 break;
141 }
142 }
143 else {
144 insert = true;
145 }
146 }
147 }
148
149 if (flush)
150 wacom_wac_queue_flush(hdev, &wacom_wac->pen_fifo);
151 else if (insert)
152 wacom_wac_queue_insert(hdev, &wacom_wac->pen_fifo,
153 raw_data, report_size);
154
155 return insert && !flush;
156 }
157
158 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
159 u8 *raw_data, int size)
160 {
161 struct wacom *wacom = hid_get_drvdata(hdev);
162
163 if (size > WACOM_PKGLEN_MAX)
164 return 1;
165
166 if (wacom_wac_pen_serial_enforce(hdev, report, raw_data, size))
167 return -1;
168
169 memcpy(wacom->wacom_wac.data, raw_data, size);
170
171 wacom_wac_irq(&wacom->wacom_wac, size);
172
173 return 0;
174 }
175
176 static int wacom_open(struct input_dev *dev)
177 {
178 struct wacom *wacom = input_get_drvdata(dev);
179
180 return hid_hw_open(wacom->hdev);
181 }
182
183 static void wacom_close(struct input_dev *dev)
184 {
185 struct wacom *wacom = input_get_drvdata(dev);
186
187 /*
188 * wacom->hdev should never be null, but surprisingly, I had the case
189 * once while unplugging the Wacom Wireless Receiver.
190 */
191 if (wacom->hdev)
192 hid_hw_close(wacom->hdev);
193 }
194
195 /*
196 * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
197 */
198 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
199 unsigned unit, int exponent)
200 {
201 struct hid_field field = {
202 .logical_maximum = logical_extents,
203 .physical_maximum = physical_extents,
204 .unit = unit,
205 .unit_exponent = exponent,
206 };
207
208 return hidinput_calc_abs_res(&field, ABS_X);
209 }
210
211 static void wacom_hid_usage_quirk(struct hid_device *hdev,
212 struct hid_field *field, struct hid_usage *usage)
213 {
214 struct wacom *wacom = hid_get_drvdata(hdev);
215 struct wacom_features *features = &wacom->wacom_wac.features;
216 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
217
218 /*
219 * The Dell Canvas 27 needs to be switched to its vendor-defined
220 * report to provide the best resolution.
221 */
222 if (hdev->vendor == USB_VENDOR_ID_WACOM &&
223 hdev->product == 0x4200 &&
224 field->application == HID_UP_MSVENDOR) {
225 wacom->wacom_wac.mode_report = field->report->id;
226 wacom->wacom_wac.mode_value = 2;
227 }
228
229 /*
230 * ISDv4 devices which predate HID's adoption of the
231 * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
232 * position instead. We can accurately detect if a
233 * usage with that value should be HID_DG_BARRELSWITCH2
234 * based on the surrounding usages, which have remained
235 * constant across generations.
236 */
237 if (features->type == HID_GENERIC &&
238 usage->hid == 0x000D0000 &&
239 field->application == HID_DG_PEN &&
240 field->physical == HID_DG_STYLUS) {
241 int i = usage->usage_index;
242
243 if (i-4 >= 0 && i+1 < field->maxusage &&
244 field->usage[i-4].hid == HID_DG_TIPSWITCH &&
245 field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
246 field->usage[i-2].hid == HID_DG_ERASER &&
247 field->usage[i-1].hid == HID_DG_INVERT &&
248 field->usage[i+1].hid == HID_DG_INRANGE) {
249 usage->hid = HID_DG_BARRELSWITCH2;
250 }
251 }
252
253 /*
254 * Wacom's AES devices use different vendor-defined usages to
255 * report serial number information compared to their branded
256 * hardware. The usages are also sometimes ill-defined and do
257 * not have the correct logical min/max values set. Lets patch
258 * the descriptor to use the branded usage convention and fix
259 * the errors.
260 */
261 if (usage->hid == WACOM_HID_WT_SERIALNUMBER &&
262 field->report_size == 16 &&
263 field->index + 2 < field->report->maxfield) {
264 struct hid_field *a = field->report->field[field->index + 1];
265 struct hid_field *b = field->report->field[field->index + 2];
266
267 if (a->maxusage > 0 &&
268 a->usage[0].hid == HID_DG_TOOLSERIALNUMBER &&
269 a->report_size == 32 &&
270 b->maxusage > 0 &&
271 b->usage[0].hid == 0xFF000000 &&
272 b->report_size == 8) {
273 features->quirks |= WACOM_QUIRK_AESPEN;
274 usage->hid = WACOM_HID_WD_TOOLTYPE;
275 field->logical_minimum = S16_MIN;
276 field->logical_maximum = S16_MAX;
277 a->logical_minimum = S32_MIN;
278 a->logical_maximum = S32_MAX;
279 b->usage[0].hid = WACOM_HID_WD_SERIALHI;
280 b->logical_minimum = 0;
281 b->logical_maximum = U8_MAX;
282 }
283 }
284
285 /* 2nd-generation Intuos Pro Large has incorrect Y maximum */
286 if (hdev->vendor == USB_VENDOR_ID_WACOM &&
287 hdev->product == 0x0358 &&
288 WACOM_PEN_FIELD(field) &&
289 equivalent_usage == HID_GD_Y) {
290 field->logical_maximum = 43200;
291 }
292 }
293
294 static void wacom_feature_mapping(struct hid_device *hdev,
295 struct hid_field *field, struct hid_usage *usage)
296 {
297 struct wacom *wacom = hid_get_drvdata(hdev);
298 struct wacom_features *features = &wacom->wacom_wac.features;
299 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
300 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
301 u8 *data;
302 int ret;
303 u32 n;
304
305 wacom_hid_usage_quirk(hdev, field, usage);
306
307 switch (equivalent_usage) {
308 case WACOM_HID_WD_TOUCH_RING_SETTING:
309 wacom->generic_has_leds = true;
310 break;
311 case HID_DG_CONTACTMAX:
312 /* leave touch_max as is if predefined */
313 if (!features->touch_max) {
314 /* read manually */
315 n = hid_report_len(field->report);
316 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
317 if (!data)
318 break;
319 data[0] = field->report->id;
320 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
321 data, n, WAC_CMD_RETRIES);
322 if (ret == n && features->type == HID_GENERIC) {
323 ret = hid_report_raw_event(hdev,
324 HID_FEATURE_REPORT, data, n, 0);
325 } else if (ret == 2 && features->type != HID_GENERIC) {
326 features->touch_max = data[1];
327 } else {
328 features->touch_max = 16;
329 hid_warn(hdev, "wacom_feature_mapping: "
330 "could not get HID_DG_CONTACTMAX, "
331 "defaulting to %d\n",
332 features->touch_max);
333 }
334 kfree(data);
335 }
336 break;
337 case HID_DG_INPUTMODE:
338 /* Ignore if value index is out of bounds. */
339 if (usage->usage_index >= field->report_count) {
340 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
341 break;
342 }
343
344 hid_data->inputmode = field->report->id;
345 hid_data->inputmode_index = usage->usage_index;
346 break;
347
348 case HID_UP_DIGITIZER:
349 if (field->report->id == 0x0B &&
350 (field->application == WACOM_HID_G9_PEN ||
351 field->application == WACOM_HID_G11_PEN)) {
352 wacom->wacom_wac.mode_report = field->report->id;
353 wacom->wacom_wac.mode_value = 0;
354 }
355 break;
356
357 case WACOM_HID_WD_DATAMODE:
358 wacom->wacom_wac.mode_report = field->report->id;
359 wacom->wacom_wac.mode_value = 2;
360 break;
361
362 case WACOM_HID_UP_G9:
363 case WACOM_HID_UP_G11:
364 if (field->report->id == 0x03 &&
365 (field->application == WACOM_HID_G9_TOUCHSCREEN ||
366 field->application == WACOM_HID_G11_TOUCHSCREEN)) {
367 wacom->wacom_wac.mode_report = field->report->id;
368 wacom->wacom_wac.mode_value = 0;
369 }
370 break;
371 case WACOM_HID_WD_OFFSETLEFT:
372 case WACOM_HID_WD_OFFSETTOP:
373 case WACOM_HID_WD_OFFSETRIGHT:
374 case WACOM_HID_WD_OFFSETBOTTOM:
375 /* read manually */
376 n = hid_report_len(field->report);
377 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
378 if (!data)
379 break;
380 data[0] = field->report->id;
381 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
382 data, n, WAC_CMD_RETRIES);
383 if (ret == n) {
384 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
385 data, n, 0);
386 } else {
387 hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
388 __func__);
389 }
390 kfree(data);
391 break;
392 }
393 }
394
395 /*
396 * Interface Descriptor of wacom devices can be incomplete and
397 * inconsistent so wacom_features table is used to store stylus
398 * device's packet lengths, various maximum values, and tablet
399 * resolution based on product ID's.
400 *
401 * For devices that contain 2 interfaces, wacom_features table is
402 * inaccurate for the touch interface. Since the Interface Descriptor
403 * for touch interfaces has pretty complete data, this function exists
404 * to query tablet for this missing information instead of hard coding in
405 * an additional table.
406 *
407 * A typical Interface Descriptor for a stylus will contain a
408 * boot mouse application collection that is not of interest and this
409 * function will ignore it.
410 *
411 * It also contains a digitizer application collection that also is not
412 * of interest since any information it contains would be duplicate
413 * of what is in wacom_features. Usually it defines a report of an array
414 * of bytes that could be used as max length of the stylus packet returned.
415 * If it happens to define a Digitizer-Stylus Physical Collection then
416 * the X and Y logical values contain valid data but it is ignored.
417 *
418 * A typical Interface Descriptor for a touch interface will contain a
419 * Digitizer-Finger Physical Collection which will define both logical
420 * X/Y maximum as well as the physical size of tablet. Since touch
421 * interfaces haven't supported pressure or distance, this is enough
422 * information to override invalid values in the wacom_features table.
423 *
424 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
425 * data. We deal with them after returning from this function.
426 */
427 static void wacom_usage_mapping(struct hid_device *hdev,
428 struct hid_field *field, struct hid_usage *usage)
429 {
430 struct wacom *wacom = hid_get_drvdata(hdev);
431 struct wacom_features *features = &wacom->wacom_wac.features;
432 bool finger = WACOM_FINGER_FIELD(field);
433 bool pen = WACOM_PEN_FIELD(field);
434 unsigned equivalent_usage = wacom_equivalent_usage(usage->hid);
435
436 /*
437 * Requiring Stylus Usage will ignore boot mouse
438 * X/Y values and some cases of invalid Digitizer X/Y
439 * values commonly reported.
440 */
441 if (pen)
442 features->device_type |= WACOM_DEVICETYPE_PEN;
443 else if (finger)
444 features->device_type |= WACOM_DEVICETYPE_TOUCH;
445 else
446 return;
447
448 wacom_hid_usage_quirk(hdev, field, usage);
449
450 switch (equivalent_usage) {
451 case HID_GD_X:
452 features->x_max = field->logical_maximum;
453 if (finger) {
454 features->x_phy = field->physical_maximum;
455 if ((features->type != BAMBOO_PT) &&
456 (features->type != BAMBOO_TOUCH)) {
457 features->unit = field->unit;
458 features->unitExpo = field->unit_exponent;
459 }
460 }
461 break;
462 case HID_GD_Y:
463 features->y_max = field->logical_maximum;
464 if (finger) {
465 features->y_phy = field->physical_maximum;
466 if ((features->type != BAMBOO_PT) &&
467 (features->type != BAMBOO_TOUCH)) {
468 features->unit = field->unit;
469 features->unitExpo = field->unit_exponent;
470 }
471 }
472 break;
473 case HID_DG_TIPPRESSURE:
474 if (pen)
475 features->pressure_max = field->logical_maximum;
476 break;
477 }
478
479 if (features->type == HID_GENERIC)
480 wacom_wac_usage_mapping(hdev, field, usage);
481 }
482
483 static void wacom_post_parse_hid(struct hid_device *hdev,
484 struct wacom_features *features)
485 {
486 struct wacom *wacom = hid_get_drvdata(hdev);
487 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
488
489 if (features->type == HID_GENERIC) {
490 /* Any last-minute generic device setup */
491 if (wacom_wac->has_mode_change) {
492 if (wacom_wac->is_direct_mode)
493 features->device_type |= WACOM_DEVICETYPE_DIRECT;
494 else
495 features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
496 }
497
498 if (features->touch_max > 1) {
499 if (features->device_type & WACOM_DEVICETYPE_DIRECT)
500 input_mt_init_slots(wacom_wac->touch_input,
501 wacom_wac->features.touch_max,
502 INPUT_MT_DIRECT);
503 else
504 input_mt_init_slots(wacom_wac->touch_input,
505 wacom_wac->features.touch_max,
506 INPUT_MT_POINTER);
507 }
508 }
509 }
510
511 static void wacom_parse_hid(struct hid_device *hdev,
512 struct wacom_features *features)
513 {
514 struct hid_report_enum *rep_enum;
515 struct hid_report *hreport;
516 int i, j;
517
518 /* check features first */
519 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
520 list_for_each_entry(hreport, &rep_enum->report_list, list) {
521 for (i = 0; i < hreport->maxfield; i++) {
522 /* Ignore if report count is out of bounds. */
523 if (hreport->field[i]->report_count < 1)
524 continue;
525
526 for (j = 0; j < hreport->field[i]->maxusage; j++) {
527 wacom_feature_mapping(hdev, hreport->field[i],
528 hreport->field[i]->usage + j);
529 }
530 }
531 }
532
533 /* now check the input usages */
534 rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
535 list_for_each_entry(hreport, &rep_enum->report_list, list) {
536
537 if (!hreport->maxfield)
538 continue;
539
540 for (i = 0; i < hreport->maxfield; i++)
541 for (j = 0; j < hreport->field[i]->maxusage; j++)
542 wacom_usage_mapping(hdev, hreport->field[i],
543 hreport->field[i]->usage + j);
544 }
545
546 wacom_post_parse_hid(hdev, features);
547 }
548
549 static int wacom_hid_set_device_mode(struct hid_device *hdev)
550 {
551 struct wacom *wacom = hid_get_drvdata(hdev);
552 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
553 struct hid_report *r;
554 struct hid_report_enum *re;
555
556 if (hid_data->inputmode < 0)
557 return 0;
558
559 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
560 r = re->report_id_hash[hid_data->inputmode];
561 if (r) {
562 r->field[0]->value[hid_data->inputmode_index] = 2;
563 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
564 }
565 return 0;
566 }
567
568 static int wacom_set_device_mode(struct hid_device *hdev,
569 struct wacom_wac *wacom_wac)
570 {
571 u8 *rep_data;
572 struct hid_report *r;
573 struct hid_report_enum *re;
574 u32 length;
575 int error = -ENOMEM, limit = 0;
576
577 if (wacom_wac->mode_report < 0)
578 return 0;
579
580 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
581 r = re->report_id_hash[wacom_wac->mode_report];
582 if (!r)
583 return -EINVAL;
584
585 rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
586 if (!rep_data)
587 return -ENOMEM;
588
589 length = hid_report_len(r);
590
591 do {
592 rep_data[0] = wacom_wac->mode_report;
593 rep_data[1] = wacom_wac->mode_value;
594
595 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
596 length, 1);
597 if (error >= 0)
598 error = wacom_get_report(hdev, HID_FEATURE_REPORT,
599 rep_data, length, 1);
600 } while (error >= 0 &&
601 rep_data[1] != wacom_wac->mode_report &&
602 limit++ < WAC_MSG_RETRIES);
603
604 kfree(rep_data);
605
606 return error < 0 ? error : 0;
607 }
608
609 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
610 struct wacom_features *features)
611 {
612 struct wacom *wacom = hid_get_drvdata(hdev);
613 int ret;
614 u8 rep_data[2];
615
616 switch (features->type) {
617 case GRAPHIRE_BT:
618 rep_data[0] = 0x03;
619 rep_data[1] = 0x00;
620 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
621 3);
622
623 if (ret >= 0) {
624 rep_data[0] = speed == 0 ? 0x05 : 0x06;
625 rep_data[1] = 0x00;
626
627 ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
628 rep_data, 2, 3);
629
630 if (ret >= 0) {
631 wacom->wacom_wac.bt_high_speed = speed;
632 return 0;
633 }
634 }
635
636 /*
637 * Note that if the raw queries fail, it's not a hard failure
638 * and it is safe to continue
639 */
640 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
641 rep_data[0], ret);
642 break;
643 case INTUOS4WL:
644 if (speed == 1)
645 wacom->wacom_wac.bt_features &= ~0x20;
646 else
647 wacom->wacom_wac.bt_features |= 0x20;
648
649 rep_data[0] = 0x03;
650 rep_data[1] = wacom->wacom_wac.bt_features;
651
652 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
653 1);
654 if (ret >= 0)
655 wacom->wacom_wac.bt_high_speed = speed;
656 break;
657 }
658
659 return 0;
660 }
661
662 /*
663 * Switch the tablet into its most-capable mode. Wacom tablets are
664 * typically configured to power-up in a mode which sends mouse-like
665 * reports to the OS. To get absolute position, pressure data, etc.
666 * from the tablet, it is necessary to switch the tablet out of this
667 * mode and into one which sends the full range of tablet data.
668 */
669 static int _wacom_query_tablet_data(struct wacom *wacom)
670 {
671 struct hid_device *hdev = wacom->hdev;
672 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
673 struct wacom_features *features = &wacom_wac->features;
674
675 if (hdev->bus == BUS_BLUETOOTH)
676 return wacom_bt_query_tablet_data(hdev, 1, features);
677
678 if (features->type != HID_GENERIC) {
679 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
680 if (features->type > TABLETPC) {
681 /* MT Tablet PC touch */
682 wacom_wac->mode_report = 3;
683 wacom_wac->mode_value = 4;
684 } else if (features->type == WACOM_24HDT) {
685 wacom_wac->mode_report = 18;
686 wacom_wac->mode_value = 2;
687 } else if (features->type == WACOM_27QHDT) {
688 wacom_wac->mode_report = 131;
689 wacom_wac->mode_value = 2;
690 } else if (features->type == BAMBOO_PAD) {
691 wacom_wac->mode_report = 2;
692 wacom_wac->mode_value = 2;
693 }
694 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
695 if (features->type <= BAMBOO_PT) {
696 wacom_wac->mode_report = 2;
697 wacom_wac->mode_value = 2;
698 }
699 }
700 }
701
702 wacom_set_device_mode(hdev, wacom_wac);
703
704 if (features->type == HID_GENERIC)
705 return wacom_hid_set_device_mode(hdev);
706
707 return 0;
708 }
709
710 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
711 struct wacom_features *features)
712 {
713 struct wacom *wacom = hid_get_drvdata(hdev);
714 struct usb_interface *intf = wacom->intf;
715
716 /* default features */
717 features->x_fuzz = 4;
718 features->y_fuzz = 4;
719 features->pressure_fuzz = 0;
720 features->distance_fuzz = 1;
721 features->tilt_fuzz = 1;
722
723 /*
724 * The wireless device HID is basic and layout conflicts with
725 * other tablets (monitor and touch interface can look like pen).
726 * Skip the query for this type and modify defaults based on
727 * interface number.
728 */
729 if (features->type == WIRELESS) {
730 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
731 features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
732 else
733 features->device_type = WACOM_DEVICETYPE_NONE;
734 return;
735 }
736
737 wacom_parse_hid(hdev, features);
738 }
739
740 struct wacom_hdev_data {
741 struct list_head list;
742 struct kref kref;
743 struct hid_device *dev;
744 struct wacom_shared shared;
745 };
746
747 static LIST_HEAD(wacom_udev_list);
748 static DEFINE_MUTEX(wacom_udev_list_lock);
749
750 static bool wacom_are_sibling(struct hid_device *hdev,
751 struct hid_device *sibling)
752 {
753 struct wacom *wacom = hid_get_drvdata(hdev);
754 struct wacom_features *features = &wacom->wacom_wac.features;
755 struct wacom *sibling_wacom = hid_get_drvdata(sibling);
756 struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
757 __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
758 __u32 oPid = features->oPid ? features->oPid : hdev->product;
759
760 /* The defined oVid/oPid must match that of the sibling */
761 if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
762 return false;
763 if (features->oPid != HID_ANY_ID && sibling->product != oPid)
764 return false;
765
766 /*
767 * Devices with the same VID/PID must share the same physical
768 * device path, while those with different VID/PID must share
769 * the same physical parent device path.
770 */
771 if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
772 if (!hid_compare_device_paths(hdev, sibling, '/'))
773 return false;
774 } else {
775 if (!hid_compare_device_paths(hdev, sibling, '.'))
776 return false;
777 }
778
779 /* Skip the remaining heuristics unless you are a HID_GENERIC device */
780 if (features->type != HID_GENERIC)
781 return true;
782
783 /*
784 * Direct-input devices may not be siblings of indirect-input
785 * devices.
786 */
787 if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
788 !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
789 return false;
790
791 /*
792 * Indirect-input devices may not be siblings of direct-input
793 * devices.
794 */
795 if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
796 (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
797 return false;
798
799 /* Pen devices may only be siblings of touch devices */
800 if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
801 !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
802 return false;
803
804 /* Touch devices may only be siblings of pen devices */
805 if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
806 !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
807 return false;
808
809 /*
810 * No reason could be found for these two devices to NOT be
811 * siblings, so there's a good chance they ARE siblings
812 */
813 return true;
814 }
815
816 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
817 {
818 struct wacom_hdev_data *data;
819
820 /* Try to find an already-probed interface from the same device */
821 list_for_each_entry(data, &wacom_udev_list, list) {
822 if (hid_compare_device_paths(hdev, data->dev, '/')) {
823 kref_get(&data->kref);
824 return data;
825 }
826 }
827
828 /* Fallback to finding devices that appear to be "siblings" */
829 list_for_each_entry(data, &wacom_udev_list, list) {
830 if (wacom_are_sibling(hdev, data->dev)) {
831 kref_get(&data->kref);
832 return data;
833 }
834 }
835
836 return NULL;
837 }
838
839 static void wacom_release_shared_data(struct kref *kref)
840 {
841 struct wacom_hdev_data *data =
842 container_of(kref, struct wacom_hdev_data, kref);
843
844 mutex_lock(&wacom_udev_list_lock);
845 list_del(&data->list);
846 mutex_unlock(&wacom_udev_list_lock);
847
848 kfree(data);
849 }
850
851 static void wacom_remove_shared_data(void *res)
852 {
853 struct wacom *wacom = res;
854 struct wacom_hdev_data *data;
855 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
856
857 if (wacom_wac->shared) {
858 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
859 shared);
860
861 if (wacom_wac->shared->touch == wacom->hdev)
862 wacom_wac->shared->touch = NULL;
863 else if (wacom_wac->shared->pen == wacom->hdev)
864 wacom_wac->shared->pen = NULL;
865
866 kref_put(&data->kref, wacom_release_shared_data);
867 wacom_wac->shared = NULL;
868 }
869 }
870
871 static int wacom_add_shared_data(struct hid_device *hdev)
872 {
873 struct wacom *wacom = hid_get_drvdata(hdev);
874 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
875 struct wacom_hdev_data *data;
876 int retval = 0;
877
878 mutex_lock(&wacom_udev_list_lock);
879
880 data = wacom_get_hdev_data(hdev);
881 if (!data) {
882 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
883 if (!data) {
884 retval = -ENOMEM;
885 goto out;
886 }
887
888 kref_init(&data->kref);
889 data->dev = hdev;
890 list_add_tail(&data->list, &wacom_udev_list);
891 }
892
893 wacom_wac->shared = &data->shared;
894
895 retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
896 if (retval) {
897 mutex_unlock(&wacom_udev_list_lock);
898 wacom_remove_shared_data(wacom);
899 return retval;
900 }
901
902 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
903 wacom_wac->shared->touch = hdev;
904 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
905 wacom_wac->shared->pen = hdev;
906
907 out:
908 mutex_unlock(&wacom_udev_list_lock);
909 return retval;
910 }
911
912 static int wacom_led_control(struct wacom *wacom)
913 {
914 unsigned char *buf;
915 int retval;
916 unsigned char report_id = WAC_CMD_LED_CONTROL;
917 int buf_size = 9;
918
919 if (!wacom->led.groups)
920 return -ENOTSUPP;
921
922 if (wacom->wacom_wac.features.type == REMOTE)
923 return -ENOTSUPP;
924
925 if (wacom->wacom_wac.pid) { /* wireless connected */
926 report_id = WAC_CMD_WL_LED_CONTROL;
927 buf_size = 13;
928 }
929 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
930 report_id = WAC_CMD_WL_INTUOSP2;
931 buf_size = 51;
932 }
933 buf = kzalloc(buf_size, GFP_KERNEL);
934 if (!buf)
935 return -ENOMEM;
936
937 if (wacom->wacom_wac.features.type == HID_GENERIC) {
938 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
939 buf[1] = wacom->led.llv;
940 buf[2] = wacom->led.groups[0].select & 0x03;
941
942 } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
943 wacom->wacom_wac.features.type <= INTUOSPL)) {
944 /*
945 * Touch Ring and crop mark LED luminance may take on
946 * one of four values:
947 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
948 */
949 int ring_led = wacom->led.groups[0].select & 0x03;
950 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
951 int crop_lum = 0;
952 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
953
954 buf[0] = report_id;
955 if (wacom->wacom_wac.pid) {
956 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
957 buf, buf_size, WAC_CMD_RETRIES);
958 buf[0] = report_id;
959 buf[4] = led_bits;
960 } else
961 buf[1] = led_bits;
962 }
963 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
964 buf[0] = report_id;
965 buf[4] = 100; // Power Connection LED (ORANGE)
966 buf[5] = 100; // BT Connection LED (BLUE)
967 buf[6] = 100; // Paper Mode (RED?)
968 buf[7] = 100; // Paper Mode (GREEN?)
969 buf[8] = 100; // Paper Mode (BLUE?)
970 buf[9] = wacom->led.llv;
971 buf[10] = wacom->led.groups[0].select & 0x03;
972 }
973 else {
974 int led = wacom->led.groups[0].select | 0x4;
975
976 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
977 wacom->wacom_wac.features.type == WACOM_24HD)
978 led |= (wacom->led.groups[1].select << 4) | 0x40;
979
980 buf[0] = report_id;
981 buf[1] = led;
982 buf[2] = wacom->led.llv;
983 buf[3] = wacom->led.hlv;
984 buf[4] = wacom->led.img_lum;
985 }
986
987 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
988 WAC_CMD_RETRIES);
989 kfree(buf);
990
991 return retval;
992 }
993
994 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
995 const unsigned len, const void *img)
996 {
997 unsigned char *buf;
998 int i, retval;
999 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
1000
1001 buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
1002 if (!buf)
1003 return -ENOMEM;
1004
1005 /* Send 'start' command */
1006 buf[0] = WAC_CMD_ICON_START;
1007 buf[1] = 1;
1008 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
1009 WAC_CMD_RETRIES);
1010 if (retval < 0)
1011 goto out;
1012
1013 buf[0] = xfer_id;
1014 buf[1] = button_id & 0x07;
1015 for (i = 0; i < 4; i++) {
1016 buf[2] = i;
1017 memcpy(buf + 3, img + i * chunk_len, chunk_len);
1018
1019 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
1020 buf, chunk_len + 3, WAC_CMD_RETRIES);
1021 if (retval < 0)
1022 break;
1023 }
1024
1025 /* Send 'stop' */
1026 buf[0] = WAC_CMD_ICON_START;
1027 buf[1] = 0;
1028 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
1029 WAC_CMD_RETRIES);
1030
1031 out:
1032 kfree(buf);
1033 return retval;
1034 }
1035
1036 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
1037 const char *buf, size_t count)
1038 {
1039 struct hid_device *hdev = to_hid_device(dev);
1040 struct wacom *wacom = hid_get_drvdata(hdev);
1041 unsigned int id;
1042 int err;
1043
1044 err = kstrtouint(buf, 10, &id);
1045 if (err)
1046 return err;
1047
1048 mutex_lock(&wacom->lock);
1049
1050 wacom->led.groups[set_id].select = id & 0x3;
1051 err = wacom_led_control(wacom);
1052
1053 mutex_unlock(&wacom->lock);
1054
1055 return err < 0 ? err : count;
1056 }
1057
1058 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
1059 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
1060 struct device_attribute *attr, const char *buf, size_t count) \
1061 { \
1062 return wacom_led_select_store(dev, SET_ID, buf, count); \
1063 } \
1064 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
1065 struct device_attribute *attr, char *buf) \
1066 { \
1067 struct hid_device *hdev = to_hid_device(dev);\
1068 struct wacom *wacom = hid_get_drvdata(hdev); \
1069 return scnprintf(buf, PAGE_SIZE, "%d\n", \
1070 wacom->led.groups[SET_ID].select); \
1071 } \
1072 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \
1073 wacom_led##SET_ID##_select_show, \
1074 wacom_led##SET_ID##_select_store)
1075
1076 DEVICE_LED_SELECT_ATTR(0);
1077 DEVICE_LED_SELECT_ATTR(1);
1078
1079 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
1080 const char *buf, size_t count)
1081 {
1082 unsigned int value;
1083 int err;
1084
1085 err = kstrtouint(buf, 10, &value);
1086 if (err)
1087 return err;
1088
1089 mutex_lock(&wacom->lock);
1090
1091 *dest = value & 0x7f;
1092 err = wacom_led_control(wacom);
1093
1094 mutex_unlock(&wacom->lock);
1095
1096 return err < 0 ? err : count;
1097 }
1098
1099 #define DEVICE_LUMINANCE_ATTR(name, field) \
1100 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
1101 struct device_attribute *attr, const char *buf, size_t count) \
1102 { \
1103 struct hid_device *hdev = to_hid_device(dev);\
1104 struct wacom *wacom = hid_get_drvdata(hdev); \
1105 \
1106 return wacom_luminance_store(wacom, &wacom->led.field, \
1107 buf, count); \
1108 } \
1109 static ssize_t wacom_##name##_luminance_show(struct device *dev, \
1110 struct device_attribute *attr, char *buf) \
1111 { \
1112 struct wacom *wacom = dev_get_drvdata(dev); \
1113 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \
1114 } \
1115 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \
1116 wacom_##name##_luminance_show, \
1117 wacom_##name##_luminance_store)
1118
1119 DEVICE_LUMINANCE_ATTR(status0, llv);
1120 DEVICE_LUMINANCE_ATTR(status1, hlv);
1121 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
1122
1123 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
1124 const char *buf, size_t count)
1125 {
1126 struct hid_device *hdev = to_hid_device(dev);
1127 struct wacom *wacom = hid_get_drvdata(hdev);
1128 int err;
1129 unsigned len;
1130 u8 xfer_id;
1131
1132 if (hdev->bus == BUS_BLUETOOTH) {
1133 len = 256;
1134 xfer_id = WAC_CMD_ICON_BT_XFER;
1135 } else {
1136 len = 1024;
1137 xfer_id = WAC_CMD_ICON_XFER;
1138 }
1139
1140 if (count != len)
1141 return -EINVAL;
1142
1143 mutex_lock(&wacom->lock);
1144
1145 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
1146
1147 mutex_unlock(&wacom->lock);
1148
1149 return err < 0 ? err : count;
1150 }
1151
1152 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
1153 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
1154 struct device_attribute *attr, const char *buf, size_t count) \
1155 { \
1156 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
1157 } \
1158 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \
1159 NULL, wacom_btnimg##BUTTON_ID##_store)
1160
1161 DEVICE_BTNIMG_ATTR(0);
1162 DEVICE_BTNIMG_ATTR(1);
1163 DEVICE_BTNIMG_ATTR(2);
1164 DEVICE_BTNIMG_ATTR(3);
1165 DEVICE_BTNIMG_ATTR(4);
1166 DEVICE_BTNIMG_ATTR(5);
1167 DEVICE_BTNIMG_ATTR(6);
1168 DEVICE_BTNIMG_ATTR(7);
1169
1170 static struct attribute *cintiq_led_attrs[] = {
1171 &dev_attr_status_led0_select.attr,
1172 &dev_attr_status_led1_select.attr,
1173 NULL
1174 };
1175
1176 static const struct attribute_group cintiq_led_attr_group = {
1177 .name = "wacom_led",
1178 .attrs = cintiq_led_attrs,
1179 };
1180
1181 static struct attribute *intuos4_led_attrs[] = {
1182 &dev_attr_status0_luminance.attr,
1183 &dev_attr_status1_luminance.attr,
1184 &dev_attr_status_led0_select.attr,
1185 &dev_attr_buttons_luminance.attr,
1186 &dev_attr_button0_rawimg.attr,
1187 &dev_attr_button1_rawimg.attr,
1188 &dev_attr_button2_rawimg.attr,
1189 &dev_attr_button3_rawimg.attr,
1190 &dev_attr_button4_rawimg.attr,
1191 &dev_attr_button5_rawimg.attr,
1192 &dev_attr_button6_rawimg.attr,
1193 &dev_attr_button7_rawimg.attr,
1194 NULL
1195 };
1196
1197 static const struct attribute_group intuos4_led_attr_group = {
1198 .name = "wacom_led",
1199 .attrs = intuos4_led_attrs,
1200 };
1201
1202 static struct attribute *intuos5_led_attrs[] = {
1203 &dev_attr_status0_luminance.attr,
1204 &dev_attr_status_led0_select.attr,
1205 NULL
1206 };
1207
1208 static const struct attribute_group intuos5_led_attr_group = {
1209 .name = "wacom_led",
1210 .attrs = intuos5_led_attrs,
1211 };
1212
1213 static struct attribute *generic_led_attrs[] = {
1214 &dev_attr_status0_luminance.attr,
1215 &dev_attr_status_led0_select.attr,
1216 NULL
1217 };
1218
1219 static const struct attribute_group generic_led_attr_group = {
1220 .name = "wacom_led",
1221 .attrs = generic_led_attrs,
1222 };
1223
1224 struct wacom_sysfs_group_devres {
1225 const struct attribute_group *group;
1226 struct kobject *root;
1227 };
1228
1229 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1230 {
1231 struct wacom_sysfs_group_devres *devres = res;
1232 struct kobject *kobj = devres->root;
1233
1234 dev_dbg(dev, "%s: dropping reference to %s\n",
1235 __func__, devres->group->name);
1236 sysfs_remove_group(kobj, devres->group);
1237 }
1238
1239 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1240 struct kobject *root,
1241 const struct attribute_group *group)
1242 {
1243 struct wacom_sysfs_group_devres *devres;
1244 int error;
1245
1246 devres = devres_alloc(wacom_devm_sysfs_group_release,
1247 sizeof(struct wacom_sysfs_group_devres),
1248 GFP_KERNEL);
1249 if (!devres)
1250 return -ENOMEM;
1251
1252 devres->group = group;
1253 devres->root = root;
1254
1255 error = sysfs_create_group(devres->root, group);
1256 if (error) {
1257 devres_free(devres);
1258 return error;
1259 }
1260
1261 devres_add(&wacom->hdev->dev, devres);
1262
1263 return 0;
1264 }
1265
1266 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1267 const struct attribute_group *group)
1268 {
1269 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1270 group);
1271 }
1272
1273 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1274 {
1275 struct wacom *wacom = led->wacom;
1276
1277 if (wacom->led.max_hlv)
1278 return led->hlv * LED_FULL / wacom->led.max_hlv;
1279
1280 if (wacom->led.max_llv)
1281 return led->llv * LED_FULL / wacom->led.max_llv;
1282
1283 /* device doesn't support brightness tuning */
1284 return LED_FULL;
1285 }
1286
1287 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1288 {
1289 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1290 struct wacom *wacom = led->wacom;
1291
1292 if (wacom->led.groups[led->group].select != led->id)
1293 return LED_OFF;
1294
1295 return wacom_leds_brightness_get(led);
1296 }
1297
1298 static int wacom_led_brightness_set(struct led_classdev *cdev,
1299 enum led_brightness brightness)
1300 {
1301 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1302 struct wacom *wacom = led->wacom;
1303 int error;
1304
1305 mutex_lock(&wacom->lock);
1306
1307 if (!wacom->led.groups || (brightness == LED_OFF &&
1308 wacom->led.groups[led->group].select != led->id)) {
1309 error = 0;
1310 goto out;
1311 }
1312
1313 led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1314 led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1315
1316 wacom->led.groups[led->group].select = led->id;
1317
1318 error = wacom_led_control(wacom);
1319
1320 out:
1321 mutex_unlock(&wacom->lock);
1322
1323 return error;
1324 }
1325
1326 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1327 enum led_brightness brightness)
1328 {
1329 }
1330
1331 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1332 struct wacom_led *led, unsigned int group,
1333 unsigned int id, bool read_only)
1334 {
1335 int error;
1336 char *name;
1337
1338 name = devm_kasprintf(dev, GFP_KERNEL,
1339 "%s::wacom-%d.%d",
1340 dev_name(dev),
1341 group,
1342 id);
1343 if (!name)
1344 return -ENOMEM;
1345
1346 if (!read_only) {
1347 led->trigger.name = name;
1348 error = devm_led_trigger_register(dev, &led->trigger);
1349 if (error) {
1350 hid_err(wacom->hdev,
1351 "failed to register LED trigger %s: %d\n",
1352 led->cdev.name, error);
1353 return error;
1354 }
1355 }
1356
1357 led->group = group;
1358 led->id = id;
1359 led->wacom = wacom;
1360 led->llv = wacom->led.llv;
1361 led->hlv = wacom->led.hlv;
1362 led->cdev.name = name;
1363 led->cdev.max_brightness = LED_FULL;
1364 led->cdev.flags = LED_HW_PLUGGABLE;
1365 led->cdev.brightness_get = __wacom_led_brightness_get;
1366 if (!read_only) {
1367 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1368 led->cdev.default_trigger = led->cdev.name;
1369 } else {
1370 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1371 }
1372
1373 error = devm_led_classdev_register(dev, &led->cdev);
1374 if (error) {
1375 hid_err(wacom->hdev,
1376 "failed to register LED %s: %d\n",
1377 led->cdev.name, error);
1378 led->cdev.name = NULL;
1379 return error;
1380 }
1381
1382 return 0;
1383 }
1384
1385 static void wacom_led_groups_release_one(void *data)
1386 {
1387 struct wacom_group_leds *group = data;
1388
1389 devres_release_group(group->dev, group);
1390 }
1391
1392 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1393 struct wacom *wacom,
1394 int group_id, int count,
1395 bool read_only)
1396 {
1397 struct wacom_led *leds;
1398 int i, error;
1399
1400 if (group_id >= wacom->led.count || count <= 0)
1401 return -EINVAL;
1402
1403 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1404 return -ENOMEM;
1405
1406 leds = devm_kcalloc(dev, count, sizeof(struct wacom_led), GFP_KERNEL);
1407 if (!leds) {
1408 error = -ENOMEM;
1409 goto err;
1410 }
1411
1412 wacom->led.groups[group_id].leds = leds;
1413 wacom->led.groups[group_id].count = count;
1414
1415 for (i = 0; i < count; i++) {
1416 error = wacom_led_register_one(dev, wacom, &leds[i],
1417 group_id, i, read_only);
1418 if (error)
1419 goto err;
1420 }
1421
1422 wacom->led.groups[group_id].dev = dev;
1423
1424 devres_close_group(dev, &wacom->led.groups[group_id]);
1425
1426 /*
1427 * There is a bug (?) in devm_led_classdev_register() in which its
1428 * increments the refcount of the parent. If the parent is an input
1429 * device, that means the ref count never reaches 0 when
1430 * devm_input_device_release() gets called.
1431 * This means that the LEDs are still there after disconnect.
1432 * Manually force the release of the group so that the leds are released
1433 * once we are done using them.
1434 */
1435 error = devm_add_action_or_reset(&wacom->hdev->dev,
1436 wacom_led_groups_release_one,
1437 &wacom->led.groups[group_id]);
1438 if (error)
1439 return error;
1440
1441 return 0;
1442
1443 err:
1444 devres_release_group(dev, &wacom->led.groups[group_id]);
1445 return error;
1446 }
1447
1448 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1449 unsigned int id)
1450 {
1451 struct wacom_group_leds *group;
1452
1453 if (group_id >= wacom->led.count)
1454 return NULL;
1455
1456 group = &wacom->led.groups[group_id];
1457
1458 if (!group->leds)
1459 return NULL;
1460
1461 id %= group->count;
1462
1463 return &group->leds[id];
1464 }
1465
1466 /**
1467 * wacom_led_next: gives the next available led with a wacom trigger.
1468 *
1469 * returns the next available struct wacom_led which has its default trigger
1470 * or the current one if none is available.
1471 */
1472 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1473 {
1474 struct wacom_led *next_led;
1475 int group, next;
1476
1477 if (!wacom || !cur)
1478 return NULL;
1479
1480 group = cur->group;
1481 next = cur->id;
1482
1483 do {
1484 next_led = wacom_led_find(wacom, group, ++next);
1485 if (!next_led || next_led == cur)
1486 return next_led;
1487 } while (next_led->cdev.trigger != &next_led->trigger);
1488
1489 return next_led;
1490 }
1491
1492 static void wacom_led_groups_release(void *data)
1493 {
1494 struct wacom *wacom = data;
1495
1496 wacom->led.groups = NULL;
1497 wacom->led.count = 0;
1498 }
1499
1500 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1501 {
1502 struct device *dev = &wacom->hdev->dev;
1503 struct wacom_group_leds *groups;
1504 int error;
1505
1506 groups = devm_kcalloc(dev, count, sizeof(struct wacom_group_leds),
1507 GFP_KERNEL);
1508 if (!groups)
1509 return -ENOMEM;
1510
1511 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1512 if (error)
1513 return error;
1514
1515 wacom->led.groups = groups;
1516 wacom->led.count = count;
1517
1518 return 0;
1519 }
1520
1521 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1522 int led_per_group, bool read_only)
1523 {
1524 struct device *dev;
1525 int i, error;
1526
1527 if (!wacom->wacom_wac.pad_input)
1528 return -EINVAL;
1529
1530 dev = &wacom->wacom_wac.pad_input->dev;
1531
1532 error = wacom_led_groups_allocate(wacom, group_count);
1533 if (error)
1534 return error;
1535
1536 for (i = 0; i < group_count; i++) {
1537 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1538 led_per_group,
1539 read_only);
1540 if (error)
1541 return error;
1542 }
1543
1544 return 0;
1545 }
1546
1547 int wacom_initialize_leds(struct wacom *wacom)
1548 {
1549 int error;
1550
1551 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1552 return 0;
1553
1554 /* Initialize default values */
1555 switch (wacom->wacom_wac.features.type) {
1556 case HID_GENERIC:
1557 if (!wacom->generic_has_leds)
1558 return 0;
1559 wacom->led.llv = 100;
1560 wacom->led.max_llv = 100;
1561
1562 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1563 if (error) {
1564 hid_err(wacom->hdev,
1565 "cannot create leds err: %d\n", error);
1566 return error;
1567 }
1568
1569 error = wacom_devm_sysfs_create_group(wacom,
1570 &generic_led_attr_group);
1571 break;
1572
1573 case INTUOS4S:
1574 case INTUOS4:
1575 case INTUOS4WL:
1576 case INTUOS4L:
1577 wacom->led.llv = 10;
1578 wacom->led.hlv = 20;
1579 wacom->led.max_llv = 127;
1580 wacom->led.max_hlv = 127;
1581 wacom->led.img_lum = 10;
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 &intuos4_led_attr_group);
1592 break;
1593
1594 case WACOM_24HD:
1595 case WACOM_21UX2:
1596 wacom->led.llv = 0;
1597 wacom->led.hlv = 0;
1598 wacom->led.img_lum = 0;
1599
1600 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1601 if (error) {
1602 hid_err(wacom->hdev,
1603 "cannot create leds err: %d\n", error);
1604 return error;
1605 }
1606
1607 error = wacom_devm_sysfs_create_group(wacom,
1608 &cintiq_led_attr_group);
1609 break;
1610
1611 case INTUOS5S:
1612 case INTUOS5:
1613 case INTUOS5L:
1614 case INTUOSPS:
1615 case INTUOSPM:
1616 case INTUOSPL:
1617 wacom->led.llv = 32;
1618 wacom->led.max_llv = 96;
1619
1620 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1621 if (error) {
1622 hid_err(wacom->hdev,
1623 "cannot create leds err: %d\n", error);
1624 return error;
1625 }
1626
1627 error = wacom_devm_sysfs_create_group(wacom,
1628 &intuos5_led_attr_group);
1629 break;
1630
1631 case INTUOSP2_BT:
1632 wacom->led.llv = 50;
1633 wacom->led.max_llv = 100;
1634 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1635 if (error) {
1636 hid_err(wacom->hdev,
1637 "cannot create leds err: %d\n", error);
1638 return error;
1639 }
1640 return 0;
1641
1642 case REMOTE:
1643 wacom->led.llv = 255;
1644 wacom->led.max_llv = 255;
1645 error = wacom_led_groups_allocate(wacom, 5);
1646 if (error) {
1647 hid_err(wacom->hdev,
1648 "cannot create leds err: %d\n", error);
1649 return error;
1650 }
1651 return 0;
1652
1653 default:
1654 return 0;
1655 }
1656
1657 if (error) {
1658 hid_err(wacom->hdev,
1659 "cannot create sysfs group err: %d\n", error);
1660 return error;
1661 }
1662
1663 return 0;
1664 }
1665
1666 static void wacom_init_work(struct work_struct *work)
1667 {
1668 struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1669
1670 _wacom_query_tablet_data(wacom);
1671 wacom_led_control(wacom);
1672 }
1673
1674 static void wacom_query_tablet_data(struct wacom *wacom)
1675 {
1676 schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1677 }
1678
1679 static enum power_supply_property wacom_battery_props[] = {
1680 POWER_SUPPLY_PROP_MODEL_NAME,
1681 POWER_SUPPLY_PROP_PRESENT,
1682 POWER_SUPPLY_PROP_STATUS,
1683 POWER_SUPPLY_PROP_SCOPE,
1684 POWER_SUPPLY_PROP_CAPACITY
1685 };
1686
1687 static int wacom_battery_get_property(struct power_supply *psy,
1688 enum power_supply_property psp,
1689 union power_supply_propval *val)
1690 {
1691 struct wacom_battery *battery = power_supply_get_drvdata(psy);
1692 int ret = 0;
1693
1694 switch (psp) {
1695 case POWER_SUPPLY_PROP_MODEL_NAME:
1696 val->strval = battery->wacom->wacom_wac.name;
1697 break;
1698 case POWER_SUPPLY_PROP_PRESENT:
1699 val->intval = battery->bat_connected;
1700 break;
1701 case POWER_SUPPLY_PROP_SCOPE:
1702 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1703 break;
1704 case POWER_SUPPLY_PROP_CAPACITY:
1705 val->intval = battery->battery_capacity;
1706 break;
1707 case POWER_SUPPLY_PROP_STATUS:
1708 if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
1709 val->intval = battery->bat_status;
1710 else if (battery->bat_charging)
1711 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1712 else if (battery->battery_capacity == 100 &&
1713 battery->ps_connected)
1714 val->intval = POWER_SUPPLY_STATUS_FULL;
1715 else if (battery->ps_connected)
1716 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1717 else
1718 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1719 break;
1720 default:
1721 ret = -EINVAL;
1722 break;
1723 }
1724
1725 return ret;
1726 }
1727
1728 static int __wacom_initialize_battery(struct wacom *wacom,
1729 struct wacom_battery *battery)
1730 {
1731 static atomic_t battery_no = ATOMIC_INIT(0);
1732 struct device *dev = &wacom->hdev->dev;
1733 struct power_supply_config psy_cfg = { .drv_data = battery, };
1734 struct power_supply *ps_bat;
1735 struct power_supply_desc *bat_desc = &battery->bat_desc;
1736 unsigned long n;
1737 int error;
1738
1739 if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1740 return -ENOMEM;
1741
1742 battery->wacom = wacom;
1743
1744 n = atomic_inc_return(&battery_no) - 1;
1745
1746 bat_desc->properties = wacom_battery_props;
1747 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1748 bat_desc->get_property = wacom_battery_get_property;
1749 sprintf(battery->bat_name, "wacom_battery_%ld", n);
1750 bat_desc->name = battery->bat_name;
1751 bat_desc->type = POWER_SUPPLY_TYPE_USB;
1752 bat_desc->use_for_apm = 0;
1753
1754 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1755 if (IS_ERR(ps_bat)) {
1756 error = PTR_ERR(ps_bat);
1757 goto err;
1758 }
1759
1760 power_supply_powers(ps_bat, &wacom->hdev->dev);
1761
1762 battery->battery = ps_bat;
1763
1764 devres_close_group(dev, bat_desc);
1765 return 0;
1766
1767 err:
1768 devres_release_group(dev, bat_desc);
1769 return error;
1770 }
1771
1772 static int wacom_initialize_battery(struct wacom *wacom)
1773 {
1774 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1775 return __wacom_initialize_battery(wacom, &wacom->battery);
1776
1777 return 0;
1778 }
1779
1780 static void wacom_destroy_battery(struct wacom *wacom)
1781 {
1782 if (wacom->battery.battery) {
1783 devres_release_group(&wacom->hdev->dev,
1784 &wacom->battery.bat_desc);
1785 wacom->battery.battery = NULL;
1786 }
1787 }
1788
1789 static ssize_t wacom_show_speed(struct device *dev,
1790 struct device_attribute
1791 *attr, char *buf)
1792 {
1793 struct hid_device *hdev = to_hid_device(dev);
1794 struct wacom *wacom = hid_get_drvdata(hdev);
1795
1796 return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1797 }
1798
1799 static ssize_t wacom_store_speed(struct device *dev,
1800 struct device_attribute *attr,
1801 const char *buf, size_t count)
1802 {
1803 struct hid_device *hdev = to_hid_device(dev);
1804 struct wacom *wacom = hid_get_drvdata(hdev);
1805 u8 new_speed;
1806
1807 if (kstrtou8(buf, 0, &new_speed))
1808 return -EINVAL;
1809
1810 if (new_speed != 0 && new_speed != 1)
1811 return -EINVAL;
1812
1813 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1814
1815 return count;
1816 }
1817
1818 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1819 wacom_show_speed, wacom_store_speed);
1820
1821
1822 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1823 struct kobj_attribute *kattr,
1824 char *buf, int index)
1825 {
1826 struct device *dev = kobj_to_dev(kobj->parent);
1827 struct hid_device *hdev = to_hid_device(dev);
1828 struct wacom *wacom = hid_get_drvdata(hdev);
1829 u8 mode;
1830
1831 mode = wacom->led.groups[index].select;
1832 return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
1833 }
1834
1835 #define DEVICE_EKR_ATTR_GROUP(SET_ID) \
1836 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \
1837 struct kobj_attribute *kattr, char *buf) \
1838 { \
1839 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \
1840 } \
1841 static struct kobj_attribute remote##SET_ID##_mode_attr = { \
1842 .attr = {.name = "remote_mode", \
1843 .mode = DEV_ATTR_RO_PERM}, \
1844 .show = wacom_show_remote##SET_ID##_mode, \
1845 }; \
1846 static struct attribute *remote##SET_ID##_serial_attrs[] = { \
1847 &remote##SET_ID##_mode_attr.attr, \
1848 NULL \
1849 }; \
1850 static const struct attribute_group remote##SET_ID##_serial_group = { \
1851 .name = NULL, \
1852 .attrs = remote##SET_ID##_serial_attrs, \
1853 }
1854
1855 DEVICE_EKR_ATTR_GROUP(0);
1856 DEVICE_EKR_ATTR_GROUP(1);
1857 DEVICE_EKR_ATTR_GROUP(2);
1858 DEVICE_EKR_ATTR_GROUP(3);
1859 DEVICE_EKR_ATTR_GROUP(4);
1860
1861 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1862 int index)
1863 {
1864 int error = 0;
1865 struct wacom_remote *remote = wacom->remote;
1866
1867 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1868 GFP_KERNEL,
1869 "%d", serial);
1870 if (!remote->remotes[index].group.name)
1871 return -ENOMEM;
1872
1873 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1874 &remote->remotes[index].group);
1875 if (error) {
1876 remote->remotes[index].group.name = NULL;
1877 hid_err(wacom->hdev,
1878 "cannot create sysfs group err: %d\n", error);
1879 return error;
1880 }
1881
1882 return 0;
1883 }
1884
1885 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1886 {
1887 const size_t buf_size = 2;
1888 unsigned char *buf;
1889 int retval;
1890
1891 buf = kzalloc(buf_size, GFP_KERNEL);
1892 if (!buf)
1893 return -ENOMEM;
1894
1895 buf[0] = WAC_CMD_DELETE_PAIRING;
1896 buf[1] = selector;
1897
1898 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1899 buf_size, WAC_CMD_RETRIES);
1900 kfree(buf);
1901
1902 return retval;
1903 }
1904
1905 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1906 struct kobj_attribute *attr,
1907 const char *buf, size_t count)
1908 {
1909 unsigned char selector = 0;
1910 struct device *dev = kobj_to_dev(kobj->parent);
1911 struct hid_device *hdev = to_hid_device(dev);
1912 struct wacom *wacom = hid_get_drvdata(hdev);
1913 int err;
1914
1915 if (!strncmp(buf, "*\n", 2)) {
1916 selector = WAC_CMD_UNPAIR_ALL;
1917 } else {
1918 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1919 buf);
1920 return -1;
1921 }
1922
1923 mutex_lock(&wacom->lock);
1924
1925 err = wacom_cmd_unpair_remote(wacom, selector);
1926 mutex_unlock(&wacom->lock);
1927
1928 return err < 0 ? err : count;
1929 }
1930
1931 static struct kobj_attribute unpair_remote_attr = {
1932 .attr = {.name = "unpair_remote", .mode = 0200},
1933 .store = wacom_store_unpair_remote,
1934 };
1935
1936 static const struct attribute *remote_unpair_attrs[] = {
1937 &unpair_remote_attr.attr,
1938 NULL
1939 };
1940
1941 static void wacom_remotes_destroy(void *data)
1942 {
1943 struct wacom *wacom = data;
1944 struct wacom_remote *remote = wacom->remote;
1945
1946 if (!remote)
1947 return;
1948
1949 kobject_put(remote->remote_dir);
1950 kfifo_free(&remote->remote_fifo);
1951 wacom->remote = NULL;
1952 }
1953
1954 static int wacom_initialize_remotes(struct wacom *wacom)
1955 {
1956 int error = 0;
1957 struct wacom_remote *remote;
1958 int i;
1959
1960 if (wacom->wacom_wac.features.type != REMOTE)
1961 return 0;
1962
1963 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1964 GFP_KERNEL);
1965 if (!remote)
1966 return -ENOMEM;
1967
1968 wacom->remote = remote;
1969
1970 spin_lock_init(&remote->remote_lock);
1971
1972 error = kfifo_alloc(&remote->remote_fifo,
1973 5 * sizeof(struct wacom_remote_data),
1974 GFP_KERNEL);
1975 if (error) {
1976 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1977 return -ENOMEM;
1978 }
1979
1980 remote->remotes[0].group = remote0_serial_group;
1981 remote->remotes[1].group = remote1_serial_group;
1982 remote->remotes[2].group = remote2_serial_group;
1983 remote->remotes[3].group = remote3_serial_group;
1984 remote->remotes[4].group = remote4_serial_group;
1985
1986 remote->remote_dir = kobject_create_and_add("wacom_remote",
1987 &wacom->hdev->dev.kobj);
1988 if (!remote->remote_dir)
1989 return -ENOMEM;
1990
1991 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1992
1993 if (error) {
1994 hid_err(wacom->hdev,
1995 "cannot create sysfs group err: %d\n", error);
1996 return error;
1997 }
1998
1999 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2000 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2001 remote->remotes[i].serial = 0;
2002 }
2003
2004 error = devm_add_action_or_reset(&wacom->hdev->dev,
2005 wacom_remotes_destroy, wacom);
2006 if (error)
2007 return error;
2008
2009 return 0;
2010 }
2011
2012 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
2013 {
2014 struct input_dev *input_dev;
2015 struct hid_device *hdev = wacom->hdev;
2016 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2017
2018 input_dev = devm_input_allocate_device(&hdev->dev);
2019 if (!input_dev)
2020 return NULL;
2021
2022 input_dev->name = wacom_wac->features.name;
2023 input_dev->phys = hdev->phys;
2024 input_dev->dev.parent = &hdev->dev;
2025 input_dev->open = wacom_open;
2026 input_dev->close = wacom_close;
2027 input_dev->uniq = hdev->uniq;
2028 input_dev->id.bustype = hdev->bus;
2029 input_dev->id.vendor = hdev->vendor;
2030 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
2031 input_dev->id.version = hdev->version;
2032 input_set_drvdata(input_dev, wacom);
2033
2034 return input_dev;
2035 }
2036
2037 static int wacom_allocate_inputs(struct wacom *wacom)
2038 {
2039 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2040
2041 wacom_wac->pen_input = wacom_allocate_input(wacom);
2042 wacom_wac->touch_input = wacom_allocate_input(wacom);
2043 wacom_wac->pad_input = wacom_allocate_input(wacom);
2044 if (!wacom_wac->pen_input ||
2045 !wacom_wac->touch_input ||
2046 !wacom_wac->pad_input)
2047 return -ENOMEM;
2048
2049 wacom_wac->pen_input->name = wacom_wac->pen_name;
2050 wacom_wac->touch_input->name = wacom_wac->touch_name;
2051 wacom_wac->pad_input->name = wacom_wac->pad_name;
2052
2053 return 0;
2054 }
2055
2056 static int wacom_register_inputs(struct wacom *wacom)
2057 {
2058 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
2059 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2060 int error = 0;
2061
2062 pen_input_dev = wacom_wac->pen_input;
2063 touch_input_dev = wacom_wac->touch_input;
2064 pad_input_dev = wacom_wac->pad_input;
2065
2066 if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
2067 return -EINVAL;
2068
2069 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
2070 if (error) {
2071 /* no pen in use on this interface */
2072 input_free_device(pen_input_dev);
2073 wacom_wac->pen_input = NULL;
2074 pen_input_dev = NULL;
2075 } else {
2076 error = input_register_device(pen_input_dev);
2077 if (error)
2078 goto fail;
2079 }
2080
2081 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
2082 if (error) {
2083 /* no touch in use on this interface */
2084 input_free_device(touch_input_dev);
2085 wacom_wac->touch_input = NULL;
2086 touch_input_dev = NULL;
2087 } else {
2088 error = input_register_device(touch_input_dev);
2089 if (error)
2090 goto fail;
2091 }
2092
2093 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
2094 if (error) {
2095 /* no pad in use on this interface */
2096 input_free_device(pad_input_dev);
2097 wacom_wac->pad_input = NULL;
2098 pad_input_dev = NULL;
2099 } else {
2100 error = input_register_device(pad_input_dev);
2101 if (error)
2102 goto fail;
2103 }
2104
2105 return 0;
2106
2107 fail:
2108 wacom_wac->pad_input = NULL;
2109 wacom_wac->touch_input = NULL;
2110 wacom_wac->pen_input = NULL;
2111 return error;
2112 }
2113
2114 /*
2115 * Not all devices report physical dimensions from HID.
2116 * Compute the default from hardcoded logical dimension
2117 * and resolution before driver overwrites them.
2118 */
2119 static void wacom_set_default_phy(struct wacom_features *features)
2120 {
2121 if (features->x_resolution) {
2122 features->x_phy = (features->x_max * 100) /
2123 features->x_resolution;
2124 features->y_phy = (features->y_max * 100) /
2125 features->y_resolution;
2126 }
2127 }
2128
2129 static void wacom_calculate_res(struct wacom_features *features)
2130 {
2131 /* set unit to "100th of a mm" for devices not reported by HID */
2132 if (!features->unit) {
2133 features->unit = 0x11;
2134 features->unitExpo = -3;
2135 }
2136
2137 features->x_resolution = wacom_calc_hid_res(features->x_max,
2138 features->x_phy,
2139 features->unit,
2140 features->unitExpo);
2141 features->y_resolution = wacom_calc_hid_res(features->y_max,
2142 features->y_phy,
2143 features->unit,
2144 features->unitExpo);
2145 }
2146
2147 void wacom_battery_work(struct work_struct *work)
2148 {
2149 struct wacom *wacom = container_of(work, struct wacom, battery_work);
2150
2151 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2152 !wacom->battery.battery) {
2153 wacom_initialize_battery(wacom);
2154 }
2155 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2156 wacom->battery.battery) {
2157 wacom_destroy_battery(wacom);
2158 }
2159 }
2160
2161 static size_t wacom_compute_pktlen(struct hid_device *hdev)
2162 {
2163 struct hid_report_enum *report_enum;
2164 struct hid_report *report;
2165 size_t size = 0;
2166
2167 report_enum = hdev->report_enum + HID_INPUT_REPORT;
2168
2169 list_for_each_entry(report, &report_enum->report_list, list) {
2170 size_t report_size = hid_report_len(report);
2171 if (report_size > size)
2172 size = report_size;
2173 }
2174
2175 return size;
2176 }
2177
2178 static void wacom_update_name(struct wacom *wacom, const char *suffix)
2179 {
2180 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2181 struct wacom_features *features = &wacom_wac->features;
2182 char name[WACOM_NAME_MAX - 20]; /* Leave some room for suffixes */
2183
2184 /* Generic devices name unspecified */
2185 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2186 char *product_name = wacom->hdev->name;
2187
2188 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
2189 struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
2190 struct usb_device *dev = interface_to_usbdev(intf);
2191 product_name = dev->product;
2192 }
2193
2194 if (wacom->hdev->bus == BUS_I2C) {
2195 snprintf(name, sizeof(name), "%s %X",
2196 features->name, wacom->hdev->product);
2197 } else if (strstr(product_name, "Wacom") ||
2198 strstr(product_name, "wacom") ||
2199 strstr(product_name, "WACOM")) {
2200 strlcpy(name, product_name, sizeof(name));
2201 } else {
2202 snprintf(name, sizeof(name), "Wacom %s", product_name);
2203 }
2204
2205 /* strip out excess whitespaces */
2206 while (1) {
2207 char *gap = strstr(name, " ");
2208 if (gap == NULL)
2209 break;
2210 /* shift everything including the terminator */
2211 memmove(gap, gap+1, strlen(gap));
2212 }
2213
2214 /* get rid of trailing whitespace */
2215 if (name[strlen(name)-1] == ' ')
2216 name[strlen(name)-1] = '\0';
2217 } else {
2218 strlcpy(name, features->name, sizeof(name));
2219 }
2220
2221 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2222 name, suffix);
2223
2224 /* Append the device type to the name */
2225 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
2226 "%s%s Pen", name, suffix);
2227 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
2228 "%s%s Finger", name, suffix);
2229 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
2230 "%s%s Pad", name, suffix);
2231 }
2232
2233 static void wacom_release_resources(struct wacom *wacom)
2234 {
2235 struct hid_device *hdev = wacom->hdev;
2236
2237 if (!wacom->resources)
2238 return;
2239
2240 devres_release_group(&hdev->dev, wacom);
2241
2242 wacom->resources = false;
2243
2244 wacom->wacom_wac.pen_input = NULL;
2245 wacom->wacom_wac.touch_input = NULL;
2246 wacom->wacom_wac.pad_input = NULL;
2247 }
2248
2249 static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
2250 {
2251 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
2252 wacom_wac->shared->type = wacom_wac->features.type;
2253 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2254 }
2255
2256 if (wacom_wac->has_mute_touch_switch) {
2257 wacom_wac->shared->has_mute_touch_switch = true;
2258 wacom_wac->shared->is_touch_on = true;
2259 }
2260
2261 if (wacom_wac->shared->has_mute_touch_switch &&
2262 wacom_wac->shared->touch_input) {
2263 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
2264 input_set_capability(wacom_wac->shared->touch_input, EV_SW,
2265 SW_MUTE_DEVICE);
2266 }
2267 }
2268
2269 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2270 {
2271 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2272 struct wacom_features *features = &wacom_wac->features;
2273 struct hid_device *hdev = wacom->hdev;
2274 int error;
2275 unsigned int connect_mask = HID_CONNECT_HIDRAW;
2276
2277 features->pktlen = wacom_compute_pktlen(hdev);
2278 if (features->pktlen > WACOM_PKGLEN_MAX)
2279 return -EINVAL;
2280
2281 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2282 return -ENOMEM;
2283
2284 wacom->resources = true;
2285
2286 error = wacom_allocate_inputs(wacom);
2287 if (error)
2288 goto fail;
2289
2290 /*
2291 * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2292 * into debug mode for the touch part.
2293 * We ignore the other interfaces.
2294 */
2295 if (features->type == BAMBOO_PAD) {
2296 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2297 features->type = HID_GENERIC;
2298 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2299 (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2300 error = -ENODEV;
2301 goto fail;
2302 }
2303 }
2304
2305 /* set the default size in case we do not get them from hid */
2306 wacom_set_default_phy(features);
2307
2308 /* Retrieve the physical and logical size for touch devices */
2309 wacom_retrieve_hid_descriptor(hdev, features);
2310 wacom_setup_device_quirks(wacom);
2311
2312 if (features->device_type == WACOM_DEVICETYPE_NONE &&
2313 features->type != WIRELESS) {
2314 error = features->type == HID_GENERIC ? -ENODEV : 0;
2315
2316 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2317 hdev->name,
2318 error ? "Ignoring" : "Assuming pen");
2319
2320 if (error)
2321 goto fail;
2322
2323 features->device_type |= WACOM_DEVICETYPE_PEN;
2324 }
2325
2326 wacom_calculate_res(features);
2327
2328 wacom_update_name(wacom, wireless ? " (WL)" : "");
2329
2330 /* pen only Bamboo neither support touch nor pad */
2331 if ((features->type == BAMBOO_PEN) &&
2332 ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2333 (features->device_type & WACOM_DEVICETYPE_PAD))) {
2334 error = -ENODEV;
2335 goto fail;
2336 }
2337
2338 error = wacom_add_shared_data(hdev);
2339 if (error)
2340 goto fail;
2341
2342 if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2343 (features->quirks & WACOM_QUIRK_BATTERY)) {
2344 error = wacom_initialize_battery(wacom);
2345 if (error)
2346 goto fail;
2347 }
2348
2349 error = wacom_register_inputs(wacom);
2350 if (error)
2351 goto fail;
2352
2353 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2354 error = wacom_initialize_leds(wacom);
2355 if (error)
2356 goto fail;
2357
2358 error = wacom_initialize_remotes(wacom);
2359 if (error)
2360 goto fail;
2361 }
2362
2363 if (features->type == HID_GENERIC)
2364 connect_mask |= HID_CONNECT_DRIVER;
2365
2366 /* Regular HID work starts now */
2367 error = hid_hw_start(hdev, connect_mask);
2368 if (error) {
2369 hid_err(hdev, "hw start failed\n");
2370 goto fail;
2371 }
2372
2373 if (!wireless) {
2374 /* Note that if query fails it is not a hard failure */
2375 wacom_query_tablet_data(wacom);
2376 }
2377
2378 /* touch only Bamboo doesn't support pen */
2379 if ((features->type == BAMBOO_TOUCH) &&
2380 (features->device_type & WACOM_DEVICETYPE_PEN)) {
2381 cancel_delayed_work_sync(&wacom->init_work);
2382 _wacom_query_tablet_data(wacom);
2383 error = -ENODEV;
2384 goto fail_quirks;
2385 }
2386
2387 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2388 error = hid_hw_open(hdev);
2389
2390 wacom_set_shared_values(wacom_wac);
2391 devres_close_group(&hdev->dev, wacom);
2392
2393 return 0;
2394
2395 fail_quirks:
2396 hid_hw_stop(hdev);
2397 fail:
2398 wacom_release_resources(wacom);
2399 return error;
2400 }
2401
2402 static void wacom_wireless_work(struct work_struct *work)
2403 {
2404 struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2405 struct usb_device *usbdev = wacom->usbdev;
2406 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2407 struct hid_device *hdev1, *hdev2;
2408 struct wacom *wacom1, *wacom2;
2409 struct wacom_wac *wacom_wac1, *wacom_wac2;
2410 int error;
2411
2412 /*
2413 * Regardless if this is a disconnect or a new tablet,
2414 * remove any existing input and battery devices.
2415 */
2416
2417 wacom_destroy_battery(wacom);
2418
2419 /* Stylus interface */
2420 hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2421 wacom1 = hid_get_drvdata(hdev1);
2422 wacom_wac1 = &(wacom1->wacom_wac);
2423 wacom_release_resources(wacom1);
2424
2425 /* Touch interface */
2426 hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2427 wacom2 = hid_get_drvdata(hdev2);
2428 wacom_wac2 = &(wacom2->wacom_wac);
2429 wacom_release_resources(wacom2);
2430
2431 if (wacom_wac->pid == 0) {
2432 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2433 } else {
2434 const struct hid_device_id *id = wacom_ids;
2435
2436 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2437 wacom_wac->pid);
2438
2439 while (id->bus) {
2440 if (id->vendor == USB_VENDOR_ID_WACOM &&
2441 id->product == wacom_wac->pid)
2442 break;
2443 id++;
2444 }
2445
2446 if (!id->bus) {
2447 hid_info(wacom->hdev, "ignoring unknown PID.\n");
2448 return;
2449 }
2450
2451 /* Stylus interface */
2452 wacom_wac1->features =
2453 *((struct wacom_features *)id->driver_data);
2454
2455 wacom_wac1->pid = wacom_wac->pid;
2456 hid_hw_stop(hdev1);
2457 error = wacom_parse_and_register(wacom1, true);
2458 if (error)
2459 goto fail;
2460
2461 /* Touch interface */
2462 if (wacom_wac1->features.touch_max ||
2463 (wacom_wac1->features.type >= INTUOSHT &&
2464 wacom_wac1->features.type <= BAMBOO_PT)) {
2465 wacom_wac2->features =
2466 *((struct wacom_features *)id->driver_data);
2467 wacom_wac2->pid = wacom_wac->pid;
2468 hid_hw_stop(hdev2);
2469 error = wacom_parse_and_register(wacom2, true);
2470 if (error)
2471 goto fail;
2472 }
2473
2474 strlcpy(wacom_wac->name, wacom_wac1->name,
2475 sizeof(wacom_wac->name));
2476 error = wacom_initialize_battery(wacom);
2477 if (error)
2478 goto fail;
2479 }
2480
2481 return;
2482
2483 fail:
2484 wacom_release_resources(wacom1);
2485 wacom_release_resources(wacom2);
2486 return;
2487 }
2488
2489 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2490 {
2491 struct wacom_remote *remote = wacom->remote;
2492 u32 serial = remote->remotes[index].serial;
2493 int i;
2494 unsigned long flags;
2495
2496 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2497 if (remote->remotes[i].serial == serial) {
2498
2499 spin_lock_irqsave(&remote->remote_lock, flags);
2500 remote->remotes[i].registered = false;
2501 spin_unlock_irqrestore(&remote->remote_lock, flags);
2502
2503 if (remote->remotes[i].battery.battery)
2504 devres_release_group(&wacom->hdev->dev,
2505 &remote->remotes[i].battery.bat_desc);
2506
2507 if (remote->remotes[i].group.name)
2508 devres_release_group(&wacom->hdev->dev,
2509 &remote->remotes[i]);
2510
2511 remote->remotes[i].serial = 0;
2512 remote->remotes[i].group.name = NULL;
2513 remote->remotes[i].battery.battery = NULL;
2514 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2515 }
2516 }
2517 }
2518
2519 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2520 unsigned int index)
2521 {
2522 struct wacom_remote *remote = wacom->remote;
2523 struct device *dev = &wacom->hdev->dev;
2524 int error, k;
2525
2526 /* A remote can pair more than once with an EKR,
2527 * check to make sure this serial isn't already paired.
2528 */
2529 for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2530 if (remote->remotes[k].serial == serial)
2531 break;
2532 }
2533
2534 if (k < WACOM_MAX_REMOTES) {
2535 remote->remotes[index].serial = serial;
2536 return 0;
2537 }
2538
2539 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2540 return -ENOMEM;
2541
2542 error = wacom_remote_create_attr_group(wacom, serial, index);
2543 if (error)
2544 goto fail;
2545
2546 remote->remotes[index].input = wacom_allocate_input(wacom);
2547 if (!remote->remotes[index].input) {
2548 error = -ENOMEM;
2549 goto fail;
2550 }
2551 remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2552 remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2553
2554 if (!remote->remotes[index].input->name) {
2555 error = -EINVAL;
2556 goto fail;
2557 }
2558
2559 error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2560 &wacom->wacom_wac);
2561 if (error)
2562 goto fail;
2563
2564 remote->remotes[index].serial = serial;
2565
2566 error = input_register_device(remote->remotes[index].input);
2567 if (error)
2568 goto fail;
2569
2570 error = wacom_led_groups_alloc_and_register_one(
2571 &remote->remotes[index].input->dev,
2572 wacom, index, 3, true);
2573 if (error)
2574 goto fail;
2575
2576 remote->remotes[index].registered = true;
2577
2578 devres_close_group(dev, &remote->remotes[index]);
2579 return 0;
2580
2581 fail:
2582 devres_release_group(dev, &remote->remotes[index]);
2583 remote->remotes[index].serial = 0;
2584 return error;
2585 }
2586
2587 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2588 {
2589 struct wacom_remote *remote = wacom->remote;
2590 int error;
2591
2592 if (!remote->remotes[index].registered)
2593 return 0;
2594
2595 if (remote->remotes[index].battery.battery)
2596 return 0;
2597
2598 if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2599 return 0;
2600
2601 error = __wacom_initialize_battery(wacom,
2602 &wacom->remote->remotes[index].battery);
2603 if (error)
2604 return error;
2605
2606 return 0;
2607 }
2608
2609 static void wacom_remote_work(struct work_struct *work)
2610 {
2611 struct wacom *wacom = container_of(work, struct wacom, remote_work);
2612 struct wacom_remote *remote = wacom->remote;
2613 struct wacom_remote_data data;
2614 unsigned long flags;
2615 unsigned int count;
2616 u32 serial;
2617 int i;
2618
2619 spin_lock_irqsave(&remote->remote_lock, flags);
2620
2621 count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2622
2623 if (count != sizeof(data)) {
2624 hid_err(wacom->hdev,
2625 "workitem triggered without status available\n");
2626 spin_unlock_irqrestore(&remote->remote_lock, flags);
2627 return;
2628 }
2629
2630 if (!kfifo_is_empty(&remote->remote_fifo))
2631 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2632
2633 spin_unlock_irqrestore(&remote->remote_lock, flags);
2634
2635 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2636 serial = data.remote[i].serial;
2637 if (data.remote[i].connected) {
2638
2639 if (remote->remotes[i].serial == serial) {
2640 wacom_remote_attach_battery(wacom, i);
2641 continue;
2642 }
2643
2644 if (remote->remotes[i].serial)
2645 wacom_remote_destroy_one(wacom, i);
2646
2647 wacom_remote_create_one(wacom, serial, i);
2648
2649 } else if (remote->remotes[i].serial) {
2650 wacom_remote_destroy_one(wacom, i);
2651 }
2652 }
2653 }
2654
2655 static void wacom_mode_change_work(struct work_struct *work)
2656 {
2657 struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
2658 struct wacom_shared *shared = wacom->wacom_wac.shared;
2659 struct wacom *wacom1 = NULL;
2660 struct wacom *wacom2 = NULL;
2661 bool is_direct = wacom->wacom_wac.is_direct_mode;
2662 int error = 0;
2663
2664 if (shared->pen) {
2665 wacom1 = hid_get_drvdata(shared->pen);
2666 wacom_release_resources(wacom1);
2667 hid_hw_stop(wacom1->hdev);
2668 wacom1->wacom_wac.has_mode_change = true;
2669 wacom1->wacom_wac.is_direct_mode = is_direct;
2670 }
2671
2672 if (shared->touch) {
2673 wacom2 = hid_get_drvdata(shared->touch);
2674 wacom_release_resources(wacom2);
2675 hid_hw_stop(wacom2->hdev);
2676 wacom2->wacom_wac.has_mode_change = true;
2677 wacom2->wacom_wac.is_direct_mode = is_direct;
2678 }
2679
2680 if (wacom1) {
2681 error = wacom_parse_and_register(wacom1, false);
2682 if (error)
2683 return;
2684 }
2685
2686 if (wacom2) {
2687 error = wacom_parse_and_register(wacom2, false);
2688 if (error)
2689 return;
2690 }
2691
2692 return;
2693 }
2694
2695 static int wacom_probe(struct hid_device *hdev,
2696 const struct hid_device_id *id)
2697 {
2698 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2699 struct usb_device *dev = interface_to_usbdev(intf);
2700 struct wacom *wacom;
2701 struct wacom_wac *wacom_wac;
2702 struct wacom_features *features;
2703 int error;
2704
2705 if (!id->driver_data)
2706 return -EINVAL;
2707
2708 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2709
2710 /* hid-core sets this quirk for the boot interface */
2711 hdev->quirks &= ~HID_QUIRK_NOGET;
2712
2713 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2714 if (!wacom)
2715 return -ENOMEM;
2716
2717 hid_set_drvdata(hdev, wacom);
2718 wacom->hdev = hdev;
2719
2720 wacom_wac = &wacom->wacom_wac;
2721 wacom_wac->features = *((struct wacom_features *)id->driver_data);
2722 features = &wacom_wac->features;
2723
2724 if (features->check_for_hid_type && features->hid_type != hdev->type)
2725 return -ENODEV;
2726
2727 error = kfifo_alloc(&wacom_wac->pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL);
2728 if (error)
2729 return error;
2730
2731 wacom_wac->hid_data.inputmode = -1;
2732 wacom_wac->mode_report = -1;
2733
2734 wacom->usbdev = dev;
2735 wacom->intf = intf;
2736 mutex_init(&wacom->lock);
2737 INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
2738 INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2739 INIT_WORK(&wacom->battery_work, wacom_battery_work);
2740 INIT_WORK(&wacom->remote_work, wacom_remote_work);
2741 INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
2742
2743 /* ask for the report descriptor to be loaded by HID */
2744 error = hid_parse(hdev);
2745 if (error) {
2746 hid_err(hdev, "parse failed\n");
2747 return error;
2748 }
2749
2750 error = wacom_parse_and_register(wacom, false);
2751 if (error)
2752 return error;
2753
2754 if (hdev->bus == BUS_BLUETOOTH) {
2755 error = device_create_file(&hdev->dev, &dev_attr_speed);
2756 if (error)
2757 hid_warn(hdev,
2758 "can't create sysfs speed attribute err: %d\n",
2759 error);
2760 }
2761
2762 return 0;
2763 }
2764
2765 static void wacom_remove(struct hid_device *hdev)
2766 {
2767 struct wacom *wacom = hid_get_drvdata(hdev);
2768 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2769 struct wacom_features *features = &wacom_wac->features;
2770
2771 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2772 hid_hw_close(hdev);
2773
2774 hid_hw_stop(hdev);
2775
2776 cancel_delayed_work_sync(&wacom->init_work);
2777 cancel_work_sync(&wacom->wireless_work);
2778 cancel_work_sync(&wacom->battery_work);
2779 cancel_work_sync(&wacom->remote_work);
2780 cancel_work_sync(&wacom->mode_change_work);
2781 if (hdev->bus == BUS_BLUETOOTH)
2782 device_remove_file(&hdev->dev, &dev_attr_speed);
2783
2784 /* make sure we don't trigger the LEDs */
2785 wacom_led_groups_release(wacom);
2786
2787 if (wacom->wacom_wac.features.type != REMOTE)
2788 wacom_release_resources(wacom);
2789
2790 kfifo_free(&wacom_wac->pen_fifo);
2791 }
2792
2793 #ifdef CONFIG_PM
2794 static int wacom_resume(struct hid_device *hdev)
2795 {
2796 struct wacom *wacom = hid_get_drvdata(hdev);
2797
2798 mutex_lock(&wacom->lock);
2799
2800 /* switch to wacom mode first */
2801 _wacom_query_tablet_data(wacom);
2802 wacom_led_control(wacom);
2803
2804 mutex_unlock(&wacom->lock);
2805
2806 return 0;
2807 }
2808
2809 static int wacom_reset_resume(struct hid_device *hdev)
2810 {
2811 return wacom_resume(hdev);
2812 }
2813 #endif /* CONFIG_PM */
2814
2815 static struct hid_driver wacom_driver = {
2816 .name = "wacom",
2817 .id_table = wacom_ids,
2818 .probe = wacom_probe,
2819 .remove = wacom_remove,
2820 .report = wacom_wac_report,
2821 #ifdef CONFIG_PM
2822 .resume = wacom_resume,
2823 .reset_resume = wacom_reset_resume,
2824 #endif
2825 .raw_event = wacom_raw_event,
2826 };
2827 module_hid_driver(wacom_driver);
2828
2829 MODULE_VERSION(DRIVER_VERSION);
2830 MODULE_AUTHOR(DRIVER_AUTHOR);
2831 MODULE_DESCRIPTION(DRIVER_DESC);
2832 MODULE_LICENSE("GPL");
Linux with added FPC-III support