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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * USB Wacom tablet support - system specific code
4 */
5
6#include "wacom_wac.h"
7#include "wacom.h"
8#include <linux/input/mt.h>
9
10#define WAC_MSG_RETRIES 5
11#define WAC_CMD_RETRIES 10
12
13#define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
14#define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
15#define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
16
17static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
18 size_t size, unsigned int retries)
19{
20 int retval;
21
22 do {
23 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
24 HID_REQ_GET_REPORT);
25 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
26
27 if (retval < 0)
28 hid_err(hdev, "wacom_get_report: ran out of retries "
29 "(last error = %d)\n", retval);
30
31 return retval;
32}
33
34static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
35 size_t size, unsigned int retries)
36{
37 int retval;
38
39 do {
40 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
41 HID_REQ_SET_REPORT);
42 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
43
44 if (retval < 0)
45 hid_err(hdev, "wacom_set_report: ran out of retries "
46 "(last error = %d)\n", retval);
47
48 return retval;
49}
50
51static void wacom_wac_queue_insert(struct hid_device *hdev,
52 struct kfifo_rec_ptr_2 *fifo,
53 u8 *raw_data, int size)
54{
55 bool warned = false;
56
57 while (kfifo_avail(fifo) < size && !kfifo_is_empty(fifo)) {
58 if (!warned)
59 hid_warn(hdev, "%s: kfifo has filled, starting to drop events\n", __func__);
60 warned = true;
61
62 kfifo_skip(fifo);
63 }
64
65 if (!kfifo_in(fifo, raw_data, size))
66 hid_warn_ratelimited(hdev, "%s: report is too large (%d)\n",
67 __func__, size);
68}
69
70static void wacom_wac_queue_flush(struct hid_device *hdev,
71 struct kfifo_rec_ptr_2 *fifo)
72{
73 while (!kfifo_is_empty(fifo)) {
74 int size = kfifo_peek_len(fifo);
75 u8 *buf __free(kfree) = kzalloc(size, GFP_ATOMIC);
76 unsigned int count;
77 int err;
78
79 if (!buf) {
80 kfifo_skip(fifo);
81 continue;
82 }
83
84 count = kfifo_out(fifo, buf, size);
85 if (count != size) {
86 // Hard to say what is the "right" action in this
87 // circumstance. Skipping the entry and continuing
88 // to flush seems reasonable enough, however.
89 hid_warn(hdev, "%s: removed fifo entry with unexpected size\n",
90 __func__);
91 continue;
92 }
93 err = hid_report_raw_event(hdev, HID_INPUT_REPORT, buf, size, size, false);
94 if (err) {
95 hid_warn(hdev, "%s: unable to flush event due to error %d\n",
96 __func__, err);
97 }
98 }
99}
100
101static int wacom_wac_pen_serial_enforce(struct hid_device *hdev,
102 struct hid_report *report, u8 *raw_data, int report_size)
103{
104 struct wacom *wacom = hid_get_drvdata(hdev);
105 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
106 struct wacom_features *features = &wacom_wac->features;
107 bool flush = false;
108 bool insert = false;
109 int i, j;
110
111 if (wacom_wac->serial[0] || !(features->quirks & WACOM_QUIRK_TOOLSERIAL))
112 return 0;
113
114 /* Queue events which have invalid tool type or serial number */
115 for (i = 0; i < report->maxfield; i++) {
116 struct hid_field *field = report->field[i];
117
118 for (j = 0; j < field->report_count; j++) {
119 struct hid_usage *usage = &field->usage[j];
120 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
121 unsigned int offset;
122 unsigned int size;
123 unsigned int value;
124
125 if (equivalent_usage != HID_DG_INRANGE &&
126 equivalent_usage != HID_DG_TOOLSERIALNUMBER &&
127 equivalent_usage != WACOM_HID_WD_SERIALHI &&
128 equivalent_usage != WACOM_HID_WD_TOOLTYPE)
129 continue;
130
131 offset = field->report_offset;
132 size = field->report_size;
133 value = hid_field_extract(hdev, raw_data+1, offset + j * size, size);
134
135 /* If we go out of range, we need to flush the queue ASAP */
136 if (equivalent_usage == HID_DG_INRANGE)
137 value = !value;
138
139 if (value) {
140 flush = true;
141 switch (equivalent_usage) {
142 case HID_DG_TOOLSERIALNUMBER:
143 wacom_wac->serial[0] = value;
144 break;
145
146 case WACOM_HID_WD_SERIALHI:
147 wacom_wac->serial[0] |= ((__u64)value) << 32;
148 break;
149
150 case WACOM_HID_WD_TOOLTYPE:
151 wacom_wac->id[0] = value;
152 break;
153 }
154 }
155 else {
156 insert = true;
157 }
158 }
159 }
160
161 if (flush)
162 wacom_wac_queue_flush(hdev, wacom_wac->pen_fifo);
163 else if (insert)
164 wacom_wac_queue_insert(hdev, wacom_wac->pen_fifo,
165 raw_data, report_size);
166
167 return insert && !flush;
168}
169
170static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
171 u8 *raw_data, int size)
172{
173 struct wacom *wacom = hid_get_drvdata(hdev);
174
175 if (wacom->wacom_wac.features.type == BOOTLOADER)
176 return 0;
177
178 if (wacom_wac_pen_serial_enforce(hdev, report, raw_data, size))
179 return -1;
180
181 wacom->wacom_wac.data = raw_data;
182
183 wacom_wac_irq(&wacom->wacom_wac, size);
184
185 return 0;
186}
187
188static int wacom_open(struct input_dev *dev)
189{
190 struct wacom *wacom = input_get_drvdata(dev);
191
192 return hid_hw_open(wacom->hdev);
193}
194
195static void wacom_close(struct input_dev *dev)
196{
197 struct wacom *wacom = input_get_drvdata(dev);
198
199 /*
200 * wacom->hdev should never be null, but surprisingly, I had the case
201 * once while unplugging the Wacom Wireless Receiver.
202 */
203 if (wacom->hdev)
204 hid_hw_close(wacom->hdev);
205}
206
207/*
208 * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
209 */
210static int wacom_calc_hid_res(int logical_extents, int physical_extents,
211 unsigned unit, int exponent)
212{
213 struct hid_field field = {
214 .logical_maximum = logical_extents,
215 .physical_maximum = physical_extents,
216 .unit = unit,
217 .unit_exponent = exponent,
218 };
219
220 return hidinput_calc_abs_res(&field, ABS_X);
221}
222
223static void wacom_hid_usage_quirk(struct hid_device *hdev,
224 struct hid_field *field, struct hid_usage *usage)
225{
226 struct wacom *wacom = hid_get_drvdata(hdev);
227 struct wacom_features *features = &wacom->wacom_wac.features;
228 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
229
230 /*
231 * The Dell Canvas 27 needs to be switched to its vendor-defined
232 * report to provide the best resolution.
233 */
234 if (hdev->vendor == USB_VENDOR_ID_WACOM &&
235 hdev->product == 0x4200 &&
236 field->application == HID_UP_MSVENDOR) {
237 wacom->wacom_wac.mode_report = field->report->id;
238 wacom->wacom_wac.mode_value = 2;
239 }
240
241 /*
242 * ISDv4 devices which predate HID's adoption of the
243 * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
244 * position instead. We can accurately detect if a
245 * usage with that value should be HID_DG_BARRELSWITCH2
246 * based on the surrounding usages, which have remained
247 * constant across generations.
248 */
249 if (features->type == HID_GENERIC &&
250 usage->hid == 0x000D0000 &&
251 field->application == HID_DG_PEN &&
252 field->physical == HID_DG_STYLUS) {
253 int i = usage->usage_index;
254
255 if (i-4 >= 0 && i+1 < field->maxusage &&
256 field->usage[i-4].hid == HID_DG_TIPSWITCH &&
257 field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
258 field->usage[i-2].hid == HID_DG_ERASER &&
259 field->usage[i-1].hid == HID_DG_INVERT &&
260 field->usage[i+1].hid == HID_DG_INRANGE) {
261 usage->hid = HID_DG_BARRELSWITCH2;
262 }
263 }
264
265 /*
266 * Wacom's AES devices use different vendor-defined usages to
267 * report serial number information compared to their branded
268 * hardware. The usages are also sometimes ill-defined and do
269 * not have the correct logical min/max values set. Lets patch
270 * the descriptor to use the branded usage convention and fix
271 * the errors.
272 */
273 if (usage->hid == WACOM_HID_WT_SERIALNUMBER &&
274 field->report_size == 16 &&
275 field->index + 2 < field->report->maxfield) {
276 struct hid_field *a = field->report->field[field->index + 1];
277 struct hid_field *b = field->report->field[field->index + 2];
278
279 if (a->maxusage > 0 &&
280 a->usage[0].hid == HID_DG_TOOLSERIALNUMBER &&
281 a->report_size == 32 &&
282 b->maxusage > 0 &&
283 b->usage[0].hid == 0xFF000000 &&
284 b->report_size == 8) {
285 features->quirks |= WACOM_QUIRK_AESPEN;
286 usage->hid = WACOM_HID_WD_TOOLTYPE;
287 field->logical_minimum = S16_MIN;
288 field->logical_maximum = S16_MAX;
289 a->logical_minimum = S32_MIN;
290 a->logical_maximum = S32_MAX;
291 b->usage[0].hid = WACOM_HID_WD_SERIALHI;
292 b->logical_minimum = 0;
293 b->logical_maximum = U8_MAX;
294 }
295 }
296
297 /* 2nd-generation Intuos Pro Large has incorrect Y maximum */
298 if (hdev->vendor == USB_VENDOR_ID_WACOM &&
299 hdev->product == 0x0358 &&
300 WACOM_PEN_FIELD(field) &&
301 equivalent_usage == HID_GD_Y) {
302 field->logical_maximum = 43200;
303 }
304}
305
306static void wacom_feature_mapping(struct hid_device *hdev,
307 struct hid_field *field, struct hid_usage *usage)
308{
309 struct wacom *wacom = hid_get_drvdata(hdev);
310 struct wacom_features *features = &wacom->wacom_wac.features;
311 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
312 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
313 u8 *data;
314 int ret;
315 u32 n;
316
317 wacom_hid_usage_quirk(hdev, field, usage);
318
319 switch (equivalent_usage) {
320 case WACOM_HID_WD_TOUCH_RING_SETTING:
321 wacom->generic_has_leds = true;
322 break;
323 case HID_DG_CONTACTMAX:
324 /* leave touch_max as is if predefined */
325 if (!features->touch_max) {
326 /* read manually */
327 n = hid_report_len(field->report);
328 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
329 if (!data)
330 break;
331 data[0] = field->report->id;
332 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
333 data, n, WAC_CMD_RETRIES);
334 if (ret == n && features->type == HID_GENERIC) {
335 ret = hid_report_raw_event(hdev,
336 HID_FEATURE_REPORT, data, n, n, 0);
337 } else if (ret == 2 && features->type != HID_GENERIC) {
338 features->touch_max = data[1];
339 } else {
340 features->touch_max = 16;
341 hid_warn(hdev, "wacom_feature_mapping: "
342 "could not get HID_DG_CONTACTMAX, "
343 "defaulting to %d\n",
344 features->touch_max);
345 }
346 kfree(data);
347 }
348 break;
349 case HID_DG_INPUTMODE:
350 /* Ignore if value index is out of bounds. */
351 if (usage->usage_index >= field->report_count) {
352 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
353 break;
354 }
355
356 hid_data->inputmode = field->report->id;
357 hid_data->inputmode_index = usage->usage_index;
358 hid_data->inputmode_field_index = field->index;
359 break;
360
361 case HID_UP_DIGITIZER:
362 if (field->report->id == 0x0B &&
363 (field->application == WACOM_HID_G9_PEN ||
364 field->application == WACOM_HID_G11_PEN)) {
365 wacom->wacom_wac.mode_report = field->report->id;
366 wacom->wacom_wac.mode_value = 0;
367 }
368 break;
369
370 case WACOM_HID_WD_DATAMODE:
371 wacom->wacom_wac.mode_report = field->report->id;
372 wacom->wacom_wac.mode_value = 2;
373 break;
374
375 case WACOM_HID_UP_G9:
376 case WACOM_HID_UP_G11:
377 if (field->report->id == 0x03 &&
378 (field->application == WACOM_HID_G9_TOUCHSCREEN ||
379 field->application == WACOM_HID_G11_TOUCHSCREEN)) {
380 wacom->wacom_wac.mode_report = field->report->id;
381 wacom->wacom_wac.mode_value = 0;
382 }
383 break;
384 case WACOM_HID_WD_OFFSETLEFT:
385 case WACOM_HID_WD_OFFSETTOP:
386 case WACOM_HID_WD_OFFSETRIGHT:
387 case WACOM_HID_WD_OFFSETBOTTOM:
388 /* read manually */
389 n = hid_report_len(field->report);
390 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
391 if (!data)
392 break;
393 data[0] = field->report->id;
394 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
395 data, n, WAC_CMD_RETRIES);
396 if (ret == n) {
397 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
398 data, n, n, 0);
399 } else {
400 hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
401 __func__);
402 }
403 kfree(data);
404 break;
405 }
406}
407
408/*
409 * Interface Descriptor of wacom devices can be incomplete and
410 * inconsistent so wacom_features table is used to store stylus
411 * device's packet lengths, various maximum values, and tablet
412 * resolution based on product ID's.
413 *
414 * For devices that contain 2 interfaces, wacom_features table is
415 * inaccurate for the touch interface. Since the Interface Descriptor
416 * for touch interfaces has pretty complete data, this function exists
417 * to query tablet for this missing information instead of hard coding in
418 * an additional table.
419 *
420 * A typical Interface Descriptor for a stylus will contain a
421 * boot mouse application collection that is not of interest and this
422 * function will ignore it.
423 *
424 * It also contains a digitizer application collection that also is not
425 * of interest since any information it contains would be duplicate
426 * of what is in wacom_features. Usually it defines a report of an array
427 * of bytes that could be used as max length of the stylus packet returned.
428 * If it happens to define a Digitizer-Stylus Physical Collection then
429 * the X and Y logical values contain valid data but it is ignored.
430 *
431 * A typical Interface Descriptor for a touch interface will contain a
432 * Digitizer-Finger Physical Collection which will define both logical
433 * X/Y maximum as well as the physical size of tablet. Since touch
434 * interfaces haven't supported pressure or distance, this is enough
435 * information to override invalid values in the wacom_features table.
436 *
437 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
438 * data. We deal with them after returning from this function.
439 */
440static void wacom_usage_mapping(struct hid_device *hdev,
441 struct hid_field *field, struct hid_usage *usage)
442{
443 struct wacom *wacom = hid_get_drvdata(hdev);
444 struct wacom_features *features = &wacom->wacom_wac.features;
445 bool finger = WACOM_FINGER_FIELD(field);
446 bool pen = WACOM_PEN_FIELD(field);
447 unsigned equivalent_usage = wacom_equivalent_usage(usage->hid);
448
449 /*
450 * Requiring Stylus Usage will ignore boot mouse
451 * X/Y values and some cases of invalid Digitizer X/Y
452 * values commonly reported.
453 */
454 if (pen)
455 features->device_type |= WACOM_DEVICETYPE_PEN;
456 else if (finger)
457 features->device_type |= WACOM_DEVICETYPE_TOUCH;
458 else
459 return;
460
461 wacom_hid_usage_quirk(hdev, field, usage);
462
463 switch (equivalent_usage) {
464 case HID_GD_X:
465 features->x_max = field->logical_maximum;
466 if (finger) {
467 features->x_phy = field->physical_maximum;
468 if ((features->type != BAMBOO_PT) &&
469 (features->type != BAMBOO_TOUCH)) {
470 features->unit = field->unit;
471 features->unitExpo = field->unit_exponent;
472 }
473 }
474 break;
475 case HID_GD_Y:
476 features->y_max = field->logical_maximum;
477 if (finger) {
478 features->y_phy = field->physical_maximum;
479 if ((features->type != BAMBOO_PT) &&
480 (features->type != BAMBOO_TOUCH)) {
481 features->unit = field->unit;
482 features->unitExpo = field->unit_exponent;
483 }
484 }
485 break;
486 case HID_DG_TIPPRESSURE:
487 if (pen)
488 features->pressure_max = field->logical_maximum;
489 break;
490 }
491
492 if (features->type == HID_GENERIC)
493 wacom_wac_usage_mapping(hdev, field, usage);
494}
495
496static void wacom_post_parse_hid(struct hid_device *hdev,
497 struct wacom_features *features)
498{
499 struct wacom *wacom = hid_get_drvdata(hdev);
500 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
501
502 if (features->type == HID_GENERIC) {
503 /* Any last-minute generic device setup */
504 if (wacom_wac->has_mode_change) {
505 if (wacom_wac->is_direct_mode)
506 features->device_type |= WACOM_DEVICETYPE_DIRECT;
507 else
508 features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
509 }
510
511 if (features->touch_max > 1) {
512 if (features->device_type & WACOM_DEVICETYPE_DIRECT)
513 input_mt_init_slots(wacom_wac->touch_input,
514 wacom_wac->features.touch_max,
515 INPUT_MT_DIRECT);
516 else
517 input_mt_init_slots(wacom_wac->touch_input,
518 wacom_wac->features.touch_max,
519 INPUT_MT_POINTER);
520 }
521 }
522}
523
524static void wacom_parse_hid(struct hid_device *hdev,
525 struct wacom_features *features)
526{
527 struct hid_report_enum *rep_enum;
528 struct hid_report *hreport;
529 int i, j;
530
531 /* check features first */
532 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
533 list_for_each_entry(hreport, &rep_enum->report_list, list) {
534 for (i = 0; i < hreport->maxfield; i++) {
535 /* Ignore if report count is out of bounds. */
536 if (hreport->field[i]->report_count < 1)
537 continue;
538
539 for (j = 0; j < hreport->field[i]->maxusage; j++) {
540 wacom_feature_mapping(hdev, hreport->field[i],
541 hreport->field[i]->usage + j);
542 }
543 }
544 }
545
546 /* now check the input usages */
547 rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
548 list_for_each_entry(hreport, &rep_enum->report_list, list) {
549
550 if (!hreport->maxfield)
551 continue;
552
553 for (i = 0; i < hreport->maxfield; i++)
554 for (j = 0; j < hreport->field[i]->maxusage; j++)
555 wacom_usage_mapping(hdev, hreport->field[i],
556 hreport->field[i]->usage + j);
557 }
558
559 wacom_post_parse_hid(hdev, features);
560}
561
562static int wacom_hid_set_device_mode(struct hid_device *hdev)
563{
564 struct wacom *wacom = hid_get_drvdata(hdev);
565 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
566 struct hid_report *r;
567 struct hid_report_enum *re;
568
569 if (hid_data->inputmode < 0)
570 return 0;
571
572 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
573 r = re->report_id_hash[hid_data->inputmode];
574 if (r && hid_data->inputmode_field_index >= 0 &&
575 hid_data->inputmode_field_index < r->maxfield) {
576 struct hid_field *field = r->field[hid_data->inputmode_field_index];
577
578 if (field && hid_data->inputmode_index < field->report_count) {
579 field->value[hid_data->inputmode_index] = 2;
580 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
581 }
582 }
583 return 0;
584}
585
586static int wacom_set_device_mode(struct hid_device *hdev,
587 struct wacom_wac *wacom_wac)
588{
589 u8 *rep_data;
590 struct hid_report *r;
591 struct hid_report_enum *re;
592 u32 length;
593 int error = -ENOMEM, limit = 0;
594
595 if (wacom_wac->mode_report < 0)
596 return 0;
597
598 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
599 r = re->report_id_hash[wacom_wac->mode_report];
600 if (!r)
601 return -EINVAL;
602
603 rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
604 if (!rep_data)
605 return -ENOMEM;
606
607 length = hid_report_len(r);
608
609 do {
610 rep_data[0] = wacom_wac->mode_report;
611 rep_data[1] = wacom_wac->mode_value;
612
613 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
614 length, 1);
615 if (error >= 0)
616 error = wacom_get_report(hdev, HID_FEATURE_REPORT,
617 rep_data, length, 1);
618 } while (error >= 0 &&
619 rep_data[1] != wacom_wac->mode_report &&
620 limit++ < WAC_MSG_RETRIES);
621
622 kfree(rep_data);
623
624 return error < 0 ? error : 0;
625}
626
627static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
628 struct wacom_features *features)
629{
630 struct wacom *wacom = hid_get_drvdata(hdev);
631 int ret;
632 u8 rep_data[2];
633
634 switch (features->type) {
635 case GRAPHIRE_BT:
636 rep_data[0] = 0x03;
637 rep_data[1] = 0x00;
638 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
639 3);
640
641 if (ret >= 0) {
642 rep_data[0] = speed == 0 ? 0x05 : 0x06;
643 rep_data[1] = 0x00;
644
645 ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
646 rep_data, 2, 3);
647
648 if (ret >= 0) {
649 wacom->wacom_wac.bt_high_speed = speed;
650 return 0;
651 }
652 }
653
654 /*
655 * Note that if the raw queries fail, it's not a hard failure
656 * and it is safe to continue
657 */
658 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
659 rep_data[0], ret);
660 break;
661 case INTUOS4WL:
662 if (speed == 1)
663 wacom->wacom_wac.bt_features &= ~0x20;
664 else
665 wacom->wacom_wac.bt_features |= 0x20;
666
667 rep_data[0] = 0x03;
668 rep_data[1] = wacom->wacom_wac.bt_features;
669
670 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
671 1);
672 if (ret >= 0)
673 wacom->wacom_wac.bt_high_speed = speed;
674 break;
675 }
676
677 return 0;
678}
679
680/*
681 * Switch the tablet into its most-capable mode. Wacom tablets are
682 * typically configured to power-up in a mode which sends mouse-like
683 * reports to the OS. To get absolute position, pressure data, etc.
684 * from the tablet, it is necessary to switch the tablet out of this
685 * mode and into one which sends the full range of tablet data.
686 */
687static int _wacom_query_tablet_data(struct wacom *wacom)
688{
689 struct hid_device *hdev = wacom->hdev;
690 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
691 struct wacom_features *features = &wacom_wac->features;
692
693 if (hdev->bus == BUS_BLUETOOTH)
694 return wacom_bt_query_tablet_data(hdev, 1, features);
695
696 if (features->type != HID_GENERIC) {
697 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
698 if (features->type > TABLETPC) {
699 /* MT Tablet PC touch */
700 wacom_wac->mode_report = 3;
701 wacom_wac->mode_value = 4;
702 } else if (features->type == WACOM_24HDT) {
703 wacom_wac->mode_report = 18;
704 wacom_wac->mode_value = 2;
705 } else if (features->type == WACOM_27QHDT) {
706 wacom_wac->mode_report = 131;
707 wacom_wac->mode_value = 2;
708 } else if (features->type == BAMBOO_PAD) {
709 wacom_wac->mode_report = 2;
710 wacom_wac->mode_value = 2;
711 }
712 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
713 if (features->type <= BAMBOO_PT) {
714 wacom_wac->mode_report = 2;
715 wacom_wac->mode_value = 2;
716 }
717 }
718 }
719
720 wacom_set_device_mode(hdev, wacom_wac);
721
722 if (features->type == HID_GENERIC)
723 return wacom_hid_set_device_mode(hdev);
724
725 return 0;
726}
727
728static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
729 struct wacom_features *features)
730{
731 struct wacom *wacom = hid_get_drvdata(hdev);
732 struct usb_interface *intf = wacom->intf;
733
734 /* default features */
735 features->x_fuzz = 4;
736 features->y_fuzz = 4;
737 features->pressure_fuzz = 0;
738 features->distance_fuzz = 1;
739 features->tilt_fuzz = 1;
740
741 /*
742 * The wireless device HID is basic and layout conflicts with
743 * other tablets (monitor and touch interface can look like pen).
744 * Skip the query for this type and modify defaults based on
745 * interface number.
746 */
747 if (features->type == WIRELESS && intf) {
748 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
749 features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
750 else
751 features->device_type = WACOM_DEVICETYPE_NONE;
752 return;
753 }
754
755 wacom_parse_hid(hdev, features);
756}
757
758struct wacom_hdev_data {
759 struct list_head list;
760 struct kref kref;
761 struct hid_device *dev;
762 struct wacom_shared shared;
763};
764
765static LIST_HEAD(wacom_udev_list);
766static DEFINE_MUTEX(wacom_udev_list_lock);
767
768static bool wacom_are_sibling(struct hid_device *hdev,
769 struct hid_device *sibling)
770{
771 struct wacom *wacom = hid_get_drvdata(hdev);
772 struct wacom_features *features = &wacom->wacom_wac.features;
773 struct wacom *sibling_wacom = hid_get_drvdata(sibling);
774 struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
775 __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
776 __u32 oPid = features->oPid ? features->oPid : hdev->product;
777
778 /* The defined oVid/oPid must match that of the sibling */
779 if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
780 return false;
781 if (features->oPid != HID_ANY_ID && sibling->product != oPid)
782 return false;
783
784 /*
785 * Devices with the same VID/PID must share the same physical
786 * device path, while those with different VID/PID must share
787 * the same physical parent device path.
788 */
789 if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
790 if (!hid_compare_device_paths(hdev, sibling, '/'))
791 return false;
792 } else {
793 if (!hid_compare_device_paths(hdev, sibling, '.'))
794 return false;
795 }
796
797 /* Skip the remaining heuristics unless you are a HID_GENERIC device */
798 if (features->type != HID_GENERIC)
799 return true;
800
801 /*
802 * Direct-input devices may not be siblings of indirect-input
803 * devices.
804 */
805 if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
806 !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
807 return false;
808
809 /*
810 * Indirect-input devices may not be siblings of direct-input
811 * devices.
812 */
813 if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
814 (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
815 return false;
816
817 /* Pen devices may only be siblings of touch devices */
818 if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
819 !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
820 return false;
821
822 /* Touch devices may only be siblings of pen devices */
823 if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
824 !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
825 return false;
826
827 /*
828 * No reason could be found for these two devices to NOT be
829 * siblings, so there's a good chance they ARE siblings
830 */
831 return true;
832}
833
834static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
835{
836 struct wacom_hdev_data *data;
837
838 /* Try to find an already-probed interface from the same device */
839 list_for_each_entry(data, &wacom_udev_list, list) {
840 if (hid_compare_device_paths(hdev, data->dev, '/')) {
841 kref_get(&data->kref);
842 return data;
843 }
844 }
845
846 /* Fallback to finding devices that appear to be "siblings" */
847 list_for_each_entry(data, &wacom_udev_list, list) {
848 if (wacom_are_sibling(hdev, data->dev)) {
849 kref_get(&data->kref);
850 return data;
851 }
852 }
853
854 return NULL;
855}
856
857static void wacom_release_shared_data(struct kref *kref)
858{
859 struct wacom_hdev_data *data =
860 container_of(kref, struct wacom_hdev_data, kref);
861
862 mutex_lock(&wacom_udev_list_lock);
863 list_del(&data->list);
864 mutex_unlock(&wacom_udev_list_lock);
865
866 kfree(data);
867}
868
869static void wacom_remove_shared_data(void *res)
870{
871 struct wacom *wacom = res;
872 struct wacom_hdev_data *data;
873 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
874
875 if (wacom_wac->shared) {
876 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
877 shared);
878
879 if (wacom_wac->shared->touch == wacom->hdev)
880 wacom_wac->shared->touch = NULL;
881 else if (wacom_wac->shared->pen == wacom->hdev)
882 wacom_wac->shared->pen = NULL;
883
884 kref_put(&data->kref, wacom_release_shared_data);
885 wacom_wac->shared = NULL;
886 }
887}
888
889static int wacom_add_shared_data(struct hid_device *hdev)
890{
891 struct wacom *wacom = hid_get_drvdata(hdev);
892 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
893 struct wacom_hdev_data *data;
894 int retval = 0;
895
896 mutex_lock(&wacom_udev_list_lock);
897
898 data = wacom_get_hdev_data(hdev);
899 if (!data) {
900 data = kzalloc_obj(struct wacom_hdev_data);
901 if (!data) {
902 mutex_unlock(&wacom_udev_list_lock);
903 return -ENOMEM;
904 }
905
906 kref_init(&data->kref);
907 data->dev = hdev;
908 list_add_tail(&data->list, &wacom_udev_list);
909 }
910
911 mutex_unlock(&wacom_udev_list_lock);
912
913 wacom_wac->shared = &data->shared;
914
915 retval = devm_add_action_or_reset(&hdev->dev, wacom_remove_shared_data, wacom);
916 if (retval)
917 return retval;
918
919 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
920 wacom_wac->shared->touch = hdev;
921 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
922 wacom_wac->shared->pen = hdev;
923
924 return retval;
925}
926
927static int wacom_led_control(struct wacom *wacom)
928{
929 unsigned char *buf;
930 int retval;
931 unsigned char report_id = WAC_CMD_LED_CONTROL;
932 int buf_size = 9;
933
934 if (!wacom->led.groups)
935 return -ENOTSUPP;
936
937 if (wacom->wacom_wac.features.type == REMOTE)
938 return -ENOTSUPP;
939
940 if (wacom->wacom_wac.pid) { /* wireless connected */
941 report_id = WAC_CMD_WL_LED_CONTROL;
942 buf_size = 13;
943 }
944 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
945 report_id = WAC_CMD_WL_INTUOSP2;
946 buf_size = 51;
947 }
948 buf = kzalloc(buf_size, GFP_KERNEL);
949 if (!buf)
950 return -ENOMEM;
951
952 if (wacom->wacom_wac.features.type == HID_GENERIC) {
953 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
954 buf[1] = wacom->led.llv;
955 buf[2] = wacom->led.groups[0].select & 0x03;
956
957 } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
958 wacom->wacom_wac.features.type <= INTUOSPL)) {
959 /*
960 * Touch Ring and crop mark LED luminance may take on
961 * one of four values:
962 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
963 */
964 int ring_led = wacom->led.groups[0].select & 0x03;
965 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
966 int crop_lum = 0;
967 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
968
969 buf[0] = report_id;
970 if (wacom->wacom_wac.pid) {
971 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
972 buf, buf_size, WAC_CMD_RETRIES);
973 buf[0] = report_id;
974 buf[4] = led_bits;
975 } else
976 buf[1] = led_bits;
977 }
978 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
979 buf[0] = report_id;
980 buf[4] = 100; // Power Connection LED (ORANGE)
981 buf[5] = 100; // BT Connection LED (BLUE)
982 buf[6] = 100; // Paper Mode (RED?)
983 buf[7] = 100; // Paper Mode (GREEN?)
984 buf[8] = 100; // Paper Mode (BLUE?)
985 buf[9] = wacom->led.llv;
986 buf[10] = wacom->led.groups[0].select & 0x03;
987 }
988 else {
989 int led = wacom->led.groups[0].select | 0x4;
990
991 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
992 wacom->wacom_wac.features.type == WACOM_24HD)
993 led |= (wacom->led.groups[1].select << 4) | 0x40;
994
995 buf[0] = report_id;
996 buf[1] = led;
997 buf[2] = wacom->led.llv;
998 buf[3] = wacom->led.hlv;
999 buf[4] = wacom->led.img_lum;
1000 }
1001
1002 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
1003 WAC_CMD_RETRIES);
1004 kfree(buf);
1005
1006 return retval;
1007}
1008
1009static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
1010 const unsigned len, const void *img)
1011{
1012 unsigned char *buf;
1013 int i, retval;
1014 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
1015
1016 buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
1017 if (!buf)
1018 return -ENOMEM;
1019
1020 /* Send 'start' command */
1021 buf[0] = WAC_CMD_ICON_START;
1022 buf[1] = 1;
1023 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
1024 WAC_CMD_RETRIES);
1025 if (retval < 0)
1026 goto out;
1027
1028 buf[0] = xfer_id;
1029 buf[1] = button_id & 0x07;
1030 for (i = 0; i < 4; i++) {
1031 buf[2] = i;
1032 memcpy(buf + 3, img + i * chunk_len, chunk_len);
1033
1034 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
1035 buf, chunk_len + 3, WAC_CMD_RETRIES);
1036 if (retval < 0)
1037 break;
1038 }
1039
1040 /* Send 'stop' */
1041 buf[0] = WAC_CMD_ICON_START;
1042 buf[1] = 0;
1043 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
1044 WAC_CMD_RETRIES);
1045
1046out:
1047 kfree(buf);
1048 return retval;
1049}
1050
1051static ssize_t wacom_led_select_store(struct device *dev, int set_id,
1052 const char *buf, size_t count)
1053{
1054 struct hid_device *hdev = to_hid_device(dev);
1055 struct wacom *wacom = hid_get_drvdata(hdev);
1056 unsigned int id;
1057 int err;
1058
1059 err = kstrtouint(buf, 10, &id);
1060 if (err)
1061 return err;
1062
1063 mutex_lock(&wacom->lock);
1064
1065 wacom->led.groups[set_id].select = id & 0x3;
1066 err = wacom_led_control(wacom);
1067
1068 mutex_unlock(&wacom->lock);
1069
1070 return err < 0 ? err : count;
1071}
1072
1073#define DEVICE_LED_SELECT_ATTR(SET_ID) \
1074static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
1075 struct device_attribute *attr, const char *buf, size_t count) \
1076{ \
1077 return wacom_led_select_store(dev, SET_ID, buf, count); \
1078} \
1079static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
1080 struct device_attribute *attr, char *buf) \
1081{ \
1082 struct hid_device *hdev = to_hid_device(dev);\
1083 struct wacom *wacom = hid_get_drvdata(hdev); \
1084 return scnprintf(buf, PAGE_SIZE, "%d\n", \
1085 wacom->led.groups[SET_ID].select); \
1086} \
1087static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \
1088 wacom_led##SET_ID##_select_show, \
1089 wacom_led##SET_ID##_select_store)
1090
1091DEVICE_LED_SELECT_ATTR(0);
1092DEVICE_LED_SELECT_ATTR(1);
1093
1094static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
1095 const char *buf, size_t count)
1096{
1097 unsigned int value;
1098 int err;
1099
1100 err = kstrtouint(buf, 10, &value);
1101 if (err)
1102 return err;
1103
1104 mutex_lock(&wacom->lock);
1105
1106 *dest = value & 0x7f;
1107 for (unsigned int i = 0; i < wacom->led.count; i++) {
1108 struct wacom_group_leds *group = &wacom->led.groups[i];
1109
1110 for (unsigned int j = 0; j < group->count; j++) {
1111 if (dest == &wacom->led.llv)
1112 group->leds[j].llv = *dest;
1113 else if (dest == &wacom->led.hlv)
1114 group->leds[j].hlv = *dest;
1115 }
1116 }
1117
1118 err = wacom_led_control(wacom);
1119
1120 mutex_unlock(&wacom->lock);
1121
1122 return err < 0 ? err : count;
1123}
1124
1125#define DEVICE_LUMINANCE_ATTR(name, field) \
1126static ssize_t wacom_##name##_luminance_store(struct device *dev, \
1127 struct device_attribute *attr, const char *buf, size_t count) \
1128{ \
1129 struct hid_device *hdev = to_hid_device(dev);\
1130 struct wacom *wacom = hid_get_drvdata(hdev); \
1131 \
1132 return wacom_luminance_store(wacom, &wacom->led.field, \
1133 buf, count); \
1134} \
1135static ssize_t wacom_##name##_luminance_show(struct device *dev, \
1136 struct device_attribute *attr, char *buf) \
1137{ \
1138 struct wacom *wacom = dev_get_drvdata(dev); \
1139 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \
1140} \
1141static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \
1142 wacom_##name##_luminance_show, \
1143 wacom_##name##_luminance_store)
1144
1145DEVICE_LUMINANCE_ATTR(status0, llv);
1146DEVICE_LUMINANCE_ATTR(status1, hlv);
1147DEVICE_LUMINANCE_ATTR(buttons, img_lum);
1148
1149static ssize_t wacom_button_image_store(struct device *dev, int button_id,
1150 const char *buf, size_t count)
1151{
1152 struct hid_device *hdev = to_hid_device(dev);
1153 struct wacom *wacom = hid_get_drvdata(hdev);
1154 int err;
1155 unsigned len;
1156 u8 xfer_id;
1157
1158 if (hdev->bus == BUS_BLUETOOTH) {
1159 len = 256;
1160 xfer_id = WAC_CMD_ICON_BT_XFER;
1161 } else {
1162 len = 1024;
1163 xfer_id = WAC_CMD_ICON_XFER;
1164 }
1165
1166 if (count != len)
1167 return -EINVAL;
1168
1169 mutex_lock(&wacom->lock);
1170
1171 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
1172
1173 mutex_unlock(&wacom->lock);
1174
1175 return err < 0 ? err : count;
1176}
1177
1178#define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
1179static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
1180 struct device_attribute *attr, const char *buf, size_t count) \
1181{ \
1182 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
1183} \
1184static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \
1185 NULL, wacom_btnimg##BUTTON_ID##_store)
1186
1187DEVICE_BTNIMG_ATTR(0);
1188DEVICE_BTNIMG_ATTR(1);
1189DEVICE_BTNIMG_ATTR(2);
1190DEVICE_BTNIMG_ATTR(3);
1191DEVICE_BTNIMG_ATTR(4);
1192DEVICE_BTNIMG_ATTR(5);
1193DEVICE_BTNIMG_ATTR(6);
1194DEVICE_BTNIMG_ATTR(7);
1195
1196static struct attribute *cintiq_led_attrs[] = {
1197 &dev_attr_status_led0_select.attr,
1198 &dev_attr_status_led1_select.attr,
1199 NULL
1200};
1201
1202static const struct attribute_group cintiq_led_attr_group = {
1203 .name = "wacom_led",
1204 .attrs = cintiq_led_attrs,
1205};
1206
1207static struct attribute *intuos4_led_attrs[] = {
1208 &dev_attr_status0_luminance.attr,
1209 &dev_attr_status1_luminance.attr,
1210 &dev_attr_status_led0_select.attr,
1211 &dev_attr_buttons_luminance.attr,
1212 &dev_attr_button0_rawimg.attr,
1213 &dev_attr_button1_rawimg.attr,
1214 &dev_attr_button2_rawimg.attr,
1215 &dev_attr_button3_rawimg.attr,
1216 &dev_attr_button4_rawimg.attr,
1217 &dev_attr_button5_rawimg.attr,
1218 &dev_attr_button6_rawimg.attr,
1219 &dev_attr_button7_rawimg.attr,
1220 NULL
1221};
1222
1223static const struct attribute_group intuos4_led_attr_group = {
1224 .name = "wacom_led",
1225 .attrs = intuos4_led_attrs,
1226};
1227
1228static struct attribute *intuos5_led_attrs[] = {
1229 &dev_attr_status0_luminance.attr,
1230 &dev_attr_status_led0_select.attr,
1231 NULL
1232};
1233
1234static const struct attribute_group intuos5_led_attr_group = {
1235 .name = "wacom_led",
1236 .attrs = intuos5_led_attrs,
1237};
1238
1239static struct attribute *generic_led_attrs[] = {
1240 &dev_attr_status0_luminance.attr,
1241 &dev_attr_status_led0_select.attr,
1242 NULL
1243};
1244
1245static const struct attribute_group generic_led_attr_group = {
1246 .name = "wacom_led",
1247 .attrs = generic_led_attrs,
1248};
1249
1250struct wacom_sysfs_group_devres {
1251 const struct attribute_group *group;
1252 struct kobject *root;
1253};
1254
1255static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1256{
1257 struct wacom_sysfs_group_devres *devres = res;
1258 struct kobject *kobj = devres->root;
1259
1260 dev_dbg(dev, "%s: dropping reference to %s\n",
1261 __func__, devres->group->name);
1262 sysfs_remove_group(kobj, devres->group);
1263}
1264
1265static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1266 struct kobject *root,
1267 const struct attribute_group *group)
1268{
1269 struct wacom_sysfs_group_devres *devres;
1270 int error;
1271
1272 devres = devres_alloc(wacom_devm_sysfs_group_release,
1273 sizeof(struct wacom_sysfs_group_devres),
1274 GFP_KERNEL);
1275 if (!devres)
1276 return -ENOMEM;
1277
1278 devres->group = group;
1279 devres->root = root;
1280
1281 error = sysfs_create_group(devres->root, group);
1282 if (error) {
1283 devres_free(devres);
1284 return error;
1285 }
1286
1287 devres_add(&wacom->hdev->dev, devres);
1288
1289 return 0;
1290}
1291
1292static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1293 const struct attribute_group *group)
1294{
1295 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1296 group);
1297}
1298
1299static void wacom_devm_kfifo_release(struct device *dev, void *res)
1300{
1301 struct kfifo_rec_ptr_2 *devres = res;
1302
1303 kfifo_free(devres);
1304}
1305
1306static int wacom_devm_kfifo_alloc(struct wacom *wacom)
1307{
1308 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1309 int fifo_size = min(PAGE_SIZE, 10 * wacom_wac->features.pktlen);
1310 struct kfifo_rec_ptr_2 *pen_fifo;
1311 int error;
1312
1313 pen_fifo = devres_alloc(wacom_devm_kfifo_release,
1314 sizeof(struct kfifo_rec_ptr_2),
1315 GFP_KERNEL);
1316
1317 if (!pen_fifo)
1318 return -ENOMEM;
1319
1320 error = kfifo_alloc(pen_fifo, fifo_size, GFP_KERNEL);
1321 if (error) {
1322 devres_free(pen_fifo);
1323 return error;
1324 }
1325
1326 devres_add(&wacom->hdev->dev, pen_fifo);
1327 wacom_wac->pen_fifo = pen_fifo;
1328
1329 return 0;
1330}
1331
1332enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1333{
1334 struct wacom *wacom = led->wacom;
1335
1336 if (wacom->led.max_hlv)
1337 return wacom_rescale(led->hlv, wacom->led.max_hlv, LED_FULL);
1338
1339 if (wacom->led.max_llv)
1340 return wacom_rescale(led->llv, wacom->led.max_llv, LED_FULL);
1341
1342 /* device doesn't support brightness tuning */
1343 return LED_FULL;
1344}
1345
1346static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1347{
1348 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1349 struct wacom *wacom = led->wacom;
1350
1351 if (wacom->led.groups[led->group].select != led->id)
1352 return LED_OFF;
1353
1354 return wacom_leds_brightness_get(led);
1355}
1356
1357static int wacom_led_brightness_set(struct led_classdev *cdev,
1358 enum led_brightness brightness)
1359{
1360 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1361 struct wacom *wacom = led->wacom;
1362 int error;
1363
1364 mutex_lock(&wacom->lock);
1365
1366 if (!wacom->led.groups || (brightness == LED_OFF &&
1367 wacom->led.groups[led->group].select != led->id)) {
1368 error = 0;
1369 goto out;
1370 }
1371
1372 led->llv = wacom->led.llv = wacom_rescale(brightness, LED_FULL, wacom->led.max_llv);
1373 led->hlv = wacom->led.hlv = wacom_rescale(brightness, LED_FULL, wacom->led.max_hlv);
1374
1375 wacom->led.groups[led->group].select = led->id;
1376
1377 error = wacom_led_control(wacom);
1378
1379out:
1380 mutex_unlock(&wacom->lock);
1381
1382 return error;
1383}
1384
1385static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1386 enum led_brightness brightness)
1387{
1388}
1389
1390static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1391 struct wacom_led *led, unsigned int group,
1392 unsigned int id, bool read_only)
1393{
1394 int error;
1395 char *name;
1396
1397 name = devm_kasprintf(dev, GFP_KERNEL,
1398 "%s::wacom-%d.%d",
1399 dev_name(dev),
1400 group,
1401 id);
1402 if (!name)
1403 return -ENOMEM;
1404
1405 led->group = group;
1406 led->id = id;
1407 led->wacom = wacom;
1408 led->llv = wacom->led.llv;
1409 led->hlv = wacom->led.hlv;
1410 led->cdev.name = name;
1411 led->cdev.max_brightness = LED_FULL;
1412 led->cdev.flags = LED_HW_PLUGGABLE;
1413 led->cdev.brightness_get = __wacom_led_brightness_get;
1414 if (!read_only) {
1415 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1416 led->cdev.default_trigger = led->cdev.name;
1417 } else {
1418 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1419 }
1420
1421 if (!read_only) {
1422 led->trigger.name = name;
1423 if (id == wacom->led.groups[group].select)
1424 led->trigger.brightness = wacom_leds_brightness_get(led);
1425 error = devm_led_trigger_register(dev, &led->trigger);
1426 if (error) {
1427 hid_err(wacom->hdev,
1428 "failed to register LED trigger %s: %d\n",
1429 led->cdev.name, error);
1430 return error;
1431 }
1432 }
1433
1434 error = devm_led_classdev_register(dev, &led->cdev);
1435 if (error) {
1436 hid_err(wacom->hdev,
1437 "failed to register LED %s: %d\n",
1438 led->cdev.name, error);
1439 led->cdev.name = NULL;
1440 return error;
1441 }
1442
1443 return 0;
1444}
1445
1446static void wacom_led_groups_release_one(void *data)
1447{
1448 struct wacom_group_leds *group = data;
1449
1450 devres_release_group(group->dev, group);
1451}
1452
1453static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1454 struct wacom *wacom,
1455 int group_id, int count,
1456 bool read_only)
1457{
1458 struct wacom_led *leds;
1459 int i, error;
1460
1461 if (group_id >= wacom->led.count || count <= 0)
1462 return -EINVAL;
1463
1464 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1465 return -ENOMEM;
1466
1467 leds = devm_kcalloc(dev, count, sizeof(struct wacom_led), GFP_KERNEL);
1468 if (!leds) {
1469 error = -ENOMEM;
1470 goto err;
1471 }
1472
1473 wacom->led.groups[group_id].leds = leds;
1474 wacom->led.groups[group_id].count = count;
1475
1476 for (i = 0; i < count; i++) {
1477 error = wacom_led_register_one(dev, wacom, &leds[i],
1478 group_id, i, read_only);
1479 if (error)
1480 goto err;
1481 }
1482
1483 wacom->led.groups[group_id].dev = dev;
1484
1485 devres_close_group(dev, &wacom->led.groups[group_id]);
1486
1487 /*
1488 * There is a bug (?) in devm_led_classdev_register() in which its
1489 * increments the refcount of the parent. If the parent is an input
1490 * device, that means the ref count never reaches 0 when
1491 * devm_input_device_release() gets called.
1492 * This means that the LEDs are still there after disconnect.
1493 * Manually force the release of the group so that the leds are released
1494 * once we are done using them.
1495 */
1496 error = devm_add_action_or_reset(&wacom->hdev->dev,
1497 wacom_led_groups_release_one,
1498 &wacom->led.groups[group_id]);
1499 if (error)
1500 return error;
1501
1502 return 0;
1503
1504err:
1505 devres_release_group(dev, &wacom->led.groups[group_id]);
1506 return error;
1507}
1508
1509struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1510 unsigned int id)
1511{
1512 struct wacom_group_leds *group;
1513
1514 if (group_id >= wacom->led.count)
1515 return NULL;
1516
1517 group = &wacom->led.groups[group_id];
1518
1519 if (!group->leds)
1520 return NULL;
1521
1522 id %= group->count;
1523
1524 return &group->leds[id];
1525}
1526
1527/*
1528 * wacom_led_next: gives the next available led with a wacom trigger.
1529 *
1530 * returns the next available struct wacom_led which has its default trigger
1531 * or the current one if none is available.
1532 */
1533struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1534{
1535 struct wacom_led *next_led;
1536 int group, next;
1537
1538 if (!wacom || !cur)
1539 return NULL;
1540
1541 group = cur->group;
1542 next = cur->id;
1543
1544 do {
1545 next_led = wacom_led_find(wacom, group, ++next);
1546 if (!next_led || next_led == cur)
1547 return next_led;
1548 } while (next_led->cdev.trigger != &next_led->trigger);
1549
1550 return next_led;
1551}
1552
1553static void wacom_led_groups_release(void *data)
1554{
1555 struct wacom *wacom = data;
1556
1557 wacom->led.groups = NULL;
1558 wacom->led.count = 0;
1559}
1560
1561static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1562{
1563 struct device *dev = &wacom->hdev->dev;
1564 struct wacom_group_leds *groups;
1565 int error;
1566
1567 groups = devm_kcalloc(dev, count, sizeof(struct wacom_group_leds),
1568 GFP_KERNEL);
1569 if (!groups)
1570 return -ENOMEM;
1571
1572 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1573 if (error)
1574 return error;
1575
1576 wacom->led.groups = groups;
1577 wacom->led.count = count;
1578
1579 return 0;
1580}
1581
1582static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1583 int led_per_group, bool read_only)
1584{
1585 struct device *dev;
1586 int i, error;
1587
1588 if (!wacom->wacom_wac.pad_input)
1589 return -EINVAL;
1590
1591 dev = &wacom->wacom_wac.pad_input->dev;
1592
1593 error = wacom_led_groups_allocate(wacom, group_count);
1594 if (error)
1595 return error;
1596
1597 for (i = 0; i < group_count; i++) {
1598 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1599 led_per_group,
1600 read_only);
1601 if (error)
1602 return error;
1603 }
1604
1605 return 0;
1606}
1607
1608int wacom_initialize_leds(struct wacom *wacom)
1609{
1610 int error;
1611
1612 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1613 return 0;
1614
1615 /* Initialize default values */
1616 switch (wacom->wacom_wac.features.type) {
1617 case HID_GENERIC:
1618 if (!wacom->generic_has_leds)
1619 return 0;
1620 wacom->led.llv = 100;
1621 wacom->led.max_llv = 100;
1622
1623 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1624 if (error) {
1625 hid_err(wacom->hdev,
1626 "cannot create leds err: %d\n", error);
1627 return error;
1628 }
1629
1630 error = wacom_devm_sysfs_create_group(wacom,
1631 &generic_led_attr_group);
1632 break;
1633
1634 case INTUOS4S:
1635 case INTUOS4:
1636 case INTUOS4WL:
1637 case INTUOS4L:
1638 wacom->led.llv = 10;
1639 wacom->led.hlv = 20;
1640 wacom->led.max_llv = 127;
1641 wacom->led.max_hlv = 127;
1642 wacom->led.img_lum = 10;
1643
1644 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1645 if (error) {
1646 hid_err(wacom->hdev,
1647 "cannot create leds err: %d\n", error);
1648 return error;
1649 }
1650
1651 error = wacom_devm_sysfs_create_group(wacom,
1652 &intuos4_led_attr_group);
1653 break;
1654
1655 case WACOM_24HD:
1656 case WACOM_21UX2:
1657 wacom->led.llv = 0;
1658 wacom->led.hlv = 0;
1659 wacom->led.img_lum = 0;
1660
1661 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1662 if (error) {
1663 hid_err(wacom->hdev,
1664 "cannot create leds err: %d\n", error);
1665 return error;
1666 }
1667
1668 error = wacom_devm_sysfs_create_group(wacom,
1669 &cintiq_led_attr_group);
1670 break;
1671
1672 case INTUOS5S:
1673 case INTUOS5:
1674 case INTUOS5L:
1675 case INTUOSPS:
1676 case INTUOSPM:
1677 case INTUOSPL:
1678 wacom->led.llv = 32;
1679 wacom->led.max_llv = 96;
1680
1681 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1682 if (error) {
1683 hid_err(wacom->hdev,
1684 "cannot create leds err: %d\n", error);
1685 return error;
1686 }
1687
1688 error = wacom_devm_sysfs_create_group(wacom,
1689 &intuos5_led_attr_group);
1690 break;
1691
1692 case INTUOSP2_BT:
1693 wacom->led.llv = 50;
1694 wacom->led.max_llv = 100;
1695 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1696 if (error) {
1697 hid_err(wacom->hdev,
1698 "cannot create leds err: %d\n", error);
1699 return error;
1700 }
1701 return 0;
1702
1703 case REMOTE:
1704 wacom->led.llv = 255;
1705 wacom->led.max_llv = 255;
1706 error = wacom_led_groups_allocate(wacom, 5);
1707 if (error) {
1708 hid_err(wacom->hdev,
1709 "cannot create leds err: %d\n", error);
1710 return error;
1711 }
1712 return 0;
1713
1714 default:
1715 return 0;
1716 }
1717
1718 if (error) {
1719 hid_err(wacom->hdev,
1720 "cannot create sysfs group err: %d\n", error);
1721 return error;
1722 }
1723
1724 return 0;
1725}
1726
1727static void wacom_init_work(struct work_struct *work)
1728{
1729 struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1730
1731 _wacom_query_tablet_data(wacom);
1732 wacom_led_control(wacom);
1733}
1734
1735static void wacom_query_tablet_data(struct wacom *wacom)
1736{
1737 schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1738}
1739
1740static enum power_supply_property wacom_battery_props[] = {
1741 POWER_SUPPLY_PROP_MODEL_NAME,
1742 POWER_SUPPLY_PROP_PRESENT,
1743 POWER_SUPPLY_PROP_STATUS,
1744 POWER_SUPPLY_PROP_SCOPE,
1745 POWER_SUPPLY_PROP_CAPACITY
1746};
1747
1748static int wacom_battery_get_property(struct power_supply *psy,
1749 enum power_supply_property psp,
1750 union power_supply_propval *val)
1751{
1752 struct wacom_battery *battery = power_supply_get_drvdata(psy);
1753 int ret = 0;
1754
1755 switch (psp) {
1756 case POWER_SUPPLY_PROP_MODEL_NAME:
1757 val->strval = battery->wacom->wacom_wac.name;
1758 break;
1759 case POWER_SUPPLY_PROP_PRESENT:
1760 val->intval = battery->bat_connected;
1761 break;
1762 case POWER_SUPPLY_PROP_SCOPE:
1763 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1764 break;
1765 case POWER_SUPPLY_PROP_CAPACITY:
1766 val->intval = battery->battery_capacity;
1767 break;
1768 case POWER_SUPPLY_PROP_STATUS:
1769 if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
1770 val->intval = battery->bat_status;
1771 else if (battery->bat_charging)
1772 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1773 else if (battery->battery_capacity == 100 &&
1774 battery->ps_connected)
1775 val->intval = POWER_SUPPLY_STATUS_FULL;
1776 else if (battery->ps_connected)
1777 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1778 else
1779 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1780 break;
1781 default:
1782 ret = -EINVAL;
1783 break;
1784 }
1785
1786 return ret;
1787}
1788
1789static int __wacom_initialize_battery(struct wacom *wacom,
1790 struct wacom_battery *battery)
1791{
1792 static atomic_t battery_no = ATOMIC_INIT(0);
1793 struct device *dev = &wacom->hdev->dev;
1794 struct power_supply_config psy_cfg = { .drv_data = battery, };
1795 struct power_supply *ps_bat;
1796 struct power_supply_desc *bat_desc = &battery->bat_desc;
1797 unsigned long n;
1798 int error;
1799
1800 if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1801 return -ENOMEM;
1802
1803 battery->wacom = wacom;
1804
1805 n = atomic_inc_return(&battery_no) - 1;
1806
1807 bat_desc->properties = wacom_battery_props;
1808 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1809 bat_desc->get_property = wacom_battery_get_property;
1810 sprintf(battery->bat_name, "wacom_battery_%ld", n);
1811 bat_desc->name = battery->bat_name;
1812 bat_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1813 bat_desc->use_for_apm = 0;
1814
1815 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1816 if (IS_ERR(ps_bat)) {
1817 error = PTR_ERR(ps_bat);
1818 goto err;
1819 }
1820
1821 power_supply_powers(ps_bat, &wacom->hdev->dev);
1822
1823 battery->battery = ps_bat;
1824
1825 devres_close_group(dev, bat_desc);
1826 return 0;
1827
1828err:
1829 devres_release_group(dev, bat_desc);
1830 return error;
1831}
1832
1833static int wacom_initialize_battery(struct wacom *wacom)
1834{
1835 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1836 return __wacom_initialize_battery(wacom, &wacom->battery);
1837
1838 return 0;
1839}
1840
1841static void wacom_destroy_battery(struct wacom *wacom)
1842{
1843 if (wacom->battery.battery) {
1844 devres_release_group(&wacom->hdev->dev,
1845 &wacom->battery.bat_desc);
1846 wacom->battery.battery = NULL;
1847 }
1848}
1849
1850static void wacom_aes_battery_handler(struct work_struct *work)
1851{
1852 struct wacom *wacom = container_of(work, struct wacom, aes_battery_work.work);
1853
1854 wacom_destroy_battery(wacom);
1855}
1856
1857static ssize_t wacom_show_speed(struct device *dev,
1858 struct device_attribute
1859 *attr, char *buf)
1860{
1861 struct hid_device *hdev = to_hid_device(dev);
1862 struct wacom *wacom = hid_get_drvdata(hdev);
1863
1864 return sysfs_emit(buf, "%i\n", wacom->wacom_wac.bt_high_speed);
1865}
1866
1867static ssize_t wacom_store_speed(struct device *dev,
1868 struct device_attribute *attr,
1869 const char *buf, size_t count)
1870{
1871 struct hid_device *hdev = to_hid_device(dev);
1872 struct wacom *wacom = hid_get_drvdata(hdev);
1873 u8 new_speed;
1874
1875 if (kstrtou8(buf, 0, &new_speed))
1876 return -EINVAL;
1877
1878 if (new_speed != 0 && new_speed != 1)
1879 return -EINVAL;
1880
1881 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1882
1883 return count;
1884}
1885
1886static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1887 wacom_show_speed, wacom_store_speed);
1888
1889
1890static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1891 struct kobj_attribute *kattr,
1892 char *buf, int index)
1893{
1894 struct device *dev = kobj_to_dev(kobj->parent);
1895 struct hid_device *hdev = to_hid_device(dev);
1896 struct wacom *wacom = hid_get_drvdata(hdev);
1897 u8 mode;
1898
1899 mode = wacom->led.groups[index].select;
1900 return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
1901}
1902
1903#define DEVICE_EKR_ATTR_GROUP(SET_ID) \
1904static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \
1905 struct kobj_attribute *kattr, char *buf) \
1906{ \
1907 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \
1908} \
1909static struct kobj_attribute remote##SET_ID##_mode_attr = { \
1910 .attr = {.name = "remote_mode", \
1911 .mode = DEV_ATTR_RO_PERM}, \
1912 .show = wacom_show_remote##SET_ID##_mode, \
1913}; \
1914static struct attribute *remote##SET_ID##_serial_attrs[] = { \
1915 &remote##SET_ID##_mode_attr.attr, \
1916 NULL \
1917}; \
1918static const struct attribute_group remote##SET_ID##_serial_group = { \
1919 .name = NULL, \
1920 .attrs = remote##SET_ID##_serial_attrs, \
1921}
1922
1923DEVICE_EKR_ATTR_GROUP(0);
1924DEVICE_EKR_ATTR_GROUP(1);
1925DEVICE_EKR_ATTR_GROUP(2);
1926DEVICE_EKR_ATTR_GROUP(3);
1927DEVICE_EKR_ATTR_GROUP(4);
1928
1929static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1930 int index)
1931{
1932 int error = 0;
1933 struct wacom_remote *remote = wacom->remote;
1934
1935 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1936 GFP_KERNEL,
1937 "%d", serial);
1938 if (!remote->remotes[index].group.name)
1939 return -ENOMEM;
1940
1941 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1942 &remote->remotes[index].group);
1943 if (error) {
1944 remote->remotes[index].group.name = NULL;
1945 hid_err(wacom->hdev,
1946 "cannot create sysfs group err: %d\n", error);
1947 return error;
1948 }
1949
1950 return 0;
1951}
1952
1953static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1954{
1955 const size_t buf_size = 2;
1956 unsigned char *buf;
1957 int retval;
1958
1959 buf = kzalloc(buf_size, GFP_KERNEL);
1960 if (!buf)
1961 return -ENOMEM;
1962
1963 buf[0] = WAC_CMD_DELETE_PAIRING;
1964 buf[1] = selector;
1965
1966 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1967 buf_size, WAC_CMD_RETRIES);
1968 kfree(buf);
1969
1970 return retval;
1971}
1972
1973static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1974 struct kobj_attribute *attr,
1975 const char *buf, size_t count)
1976{
1977 unsigned char selector = 0;
1978 struct device *dev = kobj_to_dev(kobj->parent);
1979 struct hid_device *hdev = to_hid_device(dev);
1980 struct wacom *wacom = hid_get_drvdata(hdev);
1981 int err;
1982
1983 if (!strncmp(buf, "*\n", 2)) {
1984 selector = WAC_CMD_UNPAIR_ALL;
1985 } else {
1986 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1987 buf);
1988 return -1;
1989 }
1990
1991 mutex_lock(&wacom->lock);
1992
1993 err = wacom_cmd_unpair_remote(wacom, selector);
1994 mutex_unlock(&wacom->lock);
1995
1996 return err < 0 ? err : count;
1997}
1998
1999static struct kobj_attribute unpair_remote_attr = {
2000 .attr = {.name = "unpair_remote", .mode = 0200},
2001 .store = wacom_store_unpair_remote,
2002};
2003
2004static const struct attribute *remote_unpair_attrs[] = {
2005 &unpair_remote_attr.attr,
2006 NULL
2007};
2008
2009static void wacom_remotes_destroy(void *data)
2010{
2011 struct wacom *wacom = data;
2012 struct wacom_remote *remote = wacom->remote;
2013
2014 if (!remote)
2015 return;
2016
2017 kobject_put(remote->remote_dir);
2018 kfifo_free(&remote->remote_fifo);
2019 wacom->remote = NULL;
2020}
2021
2022static int wacom_initialize_remotes(struct wacom *wacom)
2023{
2024 int error = 0;
2025 struct wacom_remote *remote;
2026 int i;
2027
2028 if (wacom->wacom_wac.features.type != REMOTE)
2029 return 0;
2030
2031 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
2032 GFP_KERNEL);
2033 if (!remote)
2034 return -ENOMEM;
2035
2036 wacom->remote = remote;
2037
2038 spin_lock_init(&remote->remote_lock);
2039
2040 error = kfifo_alloc(&remote->remote_fifo,
2041 5 * sizeof(struct wacom_remote_work_data),
2042 GFP_KERNEL);
2043 if (error) {
2044 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
2045 return -ENOMEM;
2046 }
2047
2048 remote->remotes[0].group = remote0_serial_group;
2049 remote->remotes[1].group = remote1_serial_group;
2050 remote->remotes[2].group = remote2_serial_group;
2051 remote->remotes[3].group = remote3_serial_group;
2052 remote->remotes[4].group = remote4_serial_group;
2053
2054 remote->remote_dir = kobject_create_and_add("wacom_remote",
2055 &wacom->hdev->dev.kobj);
2056 if (!remote->remote_dir) {
2057 kfifo_free(&remote->remote_fifo);
2058 return -ENOMEM;
2059 }
2060
2061 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
2062
2063 if (error) {
2064 hid_err(wacom->hdev,
2065 "cannot create sysfs group err: %d\n", error);
2066 kfifo_free(&remote->remote_fifo);
2067 kobject_put(remote->remote_dir);
2068 return error;
2069 }
2070
2071 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2072 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2073 remote->remotes[i].serial = 0;
2074 }
2075
2076 error = devm_add_action_or_reset(&wacom->hdev->dev,
2077 wacom_remotes_destroy, wacom);
2078 if (error)
2079 return error;
2080
2081 return 0;
2082}
2083
2084static struct input_dev *wacom_allocate_input(struct wacom *wacom)
2085{
2086 struct input_dev *input_dev;
2087 struct hid_device *hdev = wacom->hdev;
2088 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2089
2090 input_dev = devm_input_allocate_device(&hdev->dev);
2091 if (!input_dev)
2092 return NULL;
2093
2094 input_dev->name = wacom_wac->features.name;
2095 input_dev->phys = hdev->phys;
2096 input_dev->dev.parent = &hdev->dev;
2097 input_dev->open = wacom_open;
2098 input_dev->close = wacom_close;
2099 input_dev->uniq = hdev->uniq;
2100 input_dev->id.bustype = hdev->bus;
2101 input_dev->id.vendor = hdev->vendor;
2102 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
2103 input_dev->id.version = hdev->version;
2104 input_set_drvdata(input_dev, wacom);
2105
2106 return input_dev;
2107}
2108
2109static int wacom_allocate_inputs(struct wacom *wacom)
2110{
2111 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2112
2113 wacom_wac->pen_input = wacom_allocate_input(wacom);
2114 wacom_wac->touch_input = wacom_allocate_input(wacom);
2115 wacom_wac->pad_input = wacom_allocate_input(wacom);
2116 if (!wacom_wac->pen_input ||
2117 !wacom_wac->touch_input ||
2118 !wacom_wac->pad_input)
2119 return -ENOMEM;
2120
2121 wacom_wac->pen_input->name = wacom_wac->pen_name;
2122 wacom_wac->touch_input->name = wacom_wac->touch_name;
2123 wacom_wac->pad_input->name = wacom_wac->pad_name;
2124
2125 return 0;
2126}
2127
2128static int wacom_setup_inputs(struct wacom *wacom)
2129{
2130 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
2131 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2132 int error = 0;
2133
2134 pen_input_dev = wacom_wac->pen_input;
2135 touch_input_dev = wacom_wac->touch_input;
2136 pad_input_dev = wacom_wac->pad_input;
2137
2138 if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
2139 return -EINVAL;
2140
2141 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
2142 if (error) {
2143 /* no pen in use on this interface */
2144 input_free_device(pen_input_dev);
2145 wacom_wac->pen_input = NULL;
2146 pen_input_dev = NULL;
2147 }
2148
2149 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
2150 if (error) {
2151 /* no touch in use on this interface */
2152 input_free_device(touch_input_dev);
2153 wacom_wac->touch_input = NULL;
2154 touch_input_dev = NULL;
2155 }
2156
2157 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
2158 if (error) {
2159 /* no pad events using this interface */
2160 input_free_device(pad_input_dev);
2161 wacom_wac->pad_input = NULL;
2162 pad_input_dev = NULL;
2163 }
2164
2165 return 0;
2166}
2167
2168static int wacom_register_inputs(struct wacom *wacom)
2169{
2170 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
2171 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2172 int error = 0;
2173
2174 pen_input_dev = wacom_wac->pen_input;
2175 touch_input_dev = wacom_wac->touch_input;
2176 pad_input_dev = wacom_wac->pad_input;
2177
2178 if (pen_input_dev) {
2179 error = input_register_device(pen_input_dev);
2180 if (error)
2181 goto fail;
2182 }
2183
2184 if (touch_input_dev) {
2185 error = input_register_device(touch_input_dev);
2186 if (error)
2187 goto fail;
2188 }
2189
2190 if (pad_input_dev) {
2191 error = input_register_device(pad_input_dev);
2192 if (error)
2193 goto fail;
2194 }
2195
2196 return 0;
2197
2198fail:
2199 wacom_wac->pad_input = NULL;
2200 wacom_wac->touch_input = NULL;
2201 wacom_wac->pen_input = NULL;
2202 return error;
2203}
2204
2205/*
2206 * Not all devices report physical dimensions from HID.
2207 * Compute the default from hardcoded logical dimension
2208 * and resolution before driver overwrites them.
2209 */
2210static void wacom_set_default_phy(struct wacom_features *features)
2211{
2212 if (features->x_resolution) {
2213 features->x_phy = (features->x_max * 100) /
2214 features->x_resolution;
2215 features->y_phy = (features->y_max * 100) /
2216 features->y_resolution;
2217 }
2218}
2219
2220static void wacom_calculate_res(struct wacom_features *features)
2221{
2222 /* set unit to "100th of a mm" for devices not reported by HID */
2223 if (!features->unit) {
2224 features->unit = 0x11;
2225 features->unitExpo = -3;
2226 }
2227
2228 features->x_resolution = wacom_calc_hid_res(features->x_max,
2229 features->x_phy,
2230 features->unit,
2231 features->unitExpo);
2232 features->y_resolution = wacom_calc_hid_res(features->y_max,
2233 features->y_phy,
2234 features->unit,
2235 features->unitExpo);
2236}
2237
2238void wacom_battery_work(struct work_struct *work)
2239{
2240 struct wacom *wacom = container_of(work, struct wacom, battery_work);
2241
2242 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2243 !wacom->battery.battery) {
2244 wacom_initialize_battery(wacom);
2245 }
2246 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2247 wacom->battery.battery) {
2248 wacom_destroy_battery(wacom);
2249 }
2250}
2251
2252static size_t wacom_compute_pktlen(struct hid_device *hdev)
2253{
2254 struct hid_report_enum *report_enum;
2255 struct hid_report *report;
2256 size_t size = 0;
2257
2258 report_enum = hdev->report_enum + HID_INPUT_REPORT;
2259
2260 list_for_each_entry(report, &report_enum->report_list, list) {
2261 size_t report_size = hid_report_len(report);
2262 if (report_size > size)
2263 size = report_size;
2264 }
2265
2266 return size;
2267}
2268
2269static void wacom_update_name(struct wacom *wacom, const char *suffix)
2270{
2271 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2272 struct wacom_features *features = &wacom_wac->features;
2273 char name[WACOM_NAME_MAX - 20]; /* Leave some room for suffixes */
2274
2275 /* Generic devices name unspecified */
2276 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2277 char *product_name = wacom->hdev->name;
2278
2279 if (hid_is_usb(wacom->hdev)) {
2280 struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
2281 struct usb_device *dev = interface_to_usbdev(intf);
2282 if (dev->product != NULL)
2283 product_name = dev->product;
2284 }
2285
2286 if (wacom->hdev->bus == BUS_I2C) {
2287 snprintf(name, sizeof(name), "%s %X",
2288 features->name, wacom->hdev->product);
2289 } else if (strstr(product_name, "Wacom") ||
2290 strstr(product_name, "wacom") ||
2291 strstr(product_name, "WACOM")) {
2292 if (strscpy(name, product_name, sizeof(name)) < 0) {
2293 hid_warn(wacom->hdev, "String overflow while assembling device name");
2294 }
2295 } else {
2296 snprintf(name, sizeof(name), "Wacom %s", product_name);
2297 }
2298
2299 /* strip out excess whitespaces */
2300 while (1) {
2301 char *gap = strstr(name, " ");
2302 if (gap == NULL)
2303 break;
2304 /* shift everything including the terminator */
2305 memmove(gap, gap+1, strlen(gap));
2306 }
2307
2308 /* get rid of trailing whitespace */
2309 if (name[strlen(name)-1] == ' ')
2310 name[strlen(name)-1] = '\0';
2311 } else {
2312 if (strscpy(name, features->name, sizeof(name)) < 0) {
2313 hid_warn(wacom->hdev, "String overflow while assembling device name");
2314 }
2315 }
2316
2317 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2318 name, suffix);
2319
2320 /* Append the device type to the name */
2321 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
2322 "%s%s Pen", name, suffix);
2323 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
2324 "%s%s Finger", name, suffix);
2325 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
2326 "%s%s Pad", name, suffix);
2327}
2328
2329static void wacom_release_resources(struct wacom *wacom)
2330{
2331 struct hid_device *hdev = wacom->hdev;
2332
2333 if (!wacom->resources)
2334 return;
2335
2336 devres_release_group(&hdev->dev, wacom);
2337
2338 wacom->resources = false;
2339
2340 wacom->wacom_wac.pen_input = NULL;
2341 wacom->wacom_wac.touch_input = NULL;
2342 wacom->wacom_wac.pad_input = NULL;
2343}
2344
2345static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
2346{
2347 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
2348 wacom_wac->shared->type = wacom_wac->features.type;
2349 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2350 }
2351
2352 if (wacom_wac->has_mute_touch_switch) {
2353 wacom_wac->shared->has_mute_touch_switch = true;
2354 /* Hardware touch switch may be off. Wait until
2355 * we know the switch state to decide is_touch_on.
2356 * Softkey state should be initialized to "on" to
2357 * match historic default.
2358 */
2359 if (wacom_wac->is_soft_touch_switch)
2360 wacom_wac->shared->is_touch_on = true;
2361 }
2362
2363 if (wacom_wac->shared->has_mute_touch_switch &&
2364 wacom_wac->shared->touch_input) {
2365 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
2366 input_set_capability(wacom_wac->shared->touch_input, EV_SW,
2367 SW_MUTE_DEVICE);
2368 }
2369}
2370
2371static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2372{
2373 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2374 struct wacom_features *features = &wacom_wac->features;
2375 struct hid_device *hdev = wacom->hdev;
2376 int error;
2377 unsigned int connect_mask = HID_CONNECT_HIDRAW;
2378
2379 features->pktlen = wacom_compute_pktlen(hdev);
2380 if (!features->pktlen)
2381 return -ENODEV;
2382
2383 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2384 return -ENOMEM;
2385
2386 error = wacom_devm_kfifo_alloc(wacom);
2387 if (error)
2388 goto fail;
2389
2390 wacom->resources = true;
2391
2392 error = wacom_allocate_inputs(wacom);
2393 if (error)
2394 goto fail;
2395
2396 /*
2397 * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2398 * into debug mode for the touch part.
2399 * We ignore the other interfaces.
2400 */
2401 if (features->type == BAMBOO_PAD) {
2402 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2403 features->type = HID_GENERIC;
2404 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2405 (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2406 error = -ENODEV;
2407 goto fail;
2408 }
2409 }
2410
2411 /* set the default size in case we do not get them from hid */
2412 wacom_set_default_phy(features);
2413
2414 /* Retrieve the physical and logical size for touch devices */
2415 wacom_retrieve_hid_descriptor(hdev, features);
2416 wacom_setup_device_quirks(wacom);
2417
2418 if (features->device_type == WACOM_DEVICETYPE_NONE &&
2419 features->type != WIRELESS) {
2420 error = features->type == HID_GENERIC ? -ENODEV : 0;
2421
2422 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2423 hdev->name,
2424 error ? "Ignoring" : "Assuming pen");
2425
2426 if (error)
2427 goto fail;
2428
2429 features->device_type |= WACOM_DEVICETYPE_PEN;
2430 }
2431
2432 wacom_calculate_res(features);
2433
2434 wacom_update_name(wacom, wireless ? " (WL)" : "");
2435
2436 /* pen only Bamboo neither support touch nor pad */
2437 if ((features->type == BAMBOO_PEN) &&
2438 ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2439 (features->device_type & WACOM_DEVICETYPE_PAD))) {
2440 error = -ENODEV;
2441 goto fail;
2442 }
2443
2444 error = wacom_add_shared_data(hdev);
2445 if (error)
2446 goto fail;
2447
2448 error = wacom_setup_inputs(wacom);
2449 if (error)
2450 goto fail;
2451
2452 if (features->type == HID_GENERIC)
2453 connect_mask |= HID_CONNECT_DRIVER;
2454
2455 /* Regular HID work starts now */
2456 error = hid_hw_start(hdev, connect_mask);
2457 if (error) {
2458 hid_err(hdev, "hw start failed\n");
2459 goto fail;
2460 }
2461
2462 error = wacom_register_inputs(wacom);
2463 if (error)
2464 goto fail_hw_stop;
2465
2466 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2467 error = wacom_initialize_leds(wacom);
2468 if (error)
2469 goto fail_hw_stop;
2470
2471 error = wacom_initialize_remotes(wacom);
2472 if (error)
2473 goto fail_hw_stop;
2474 }
2475
2476 if (!wireless) {
2477 /* Note that if query fails it is not a hard failure */
2478 wacom_query_tablet_data(wacom);
2479 }
2480
2481 /* touch only Bamboo doesn't support pen */
2482 if ((features->type == BAMBOO_TOUCH) &&
2483 (features->device_type & WACOM_DEVICETYPE_PEN)) {
2484 cancel_delayed_work_sync(&wacom->init_work);
2485 _wacom_query_tablet_data(wacom);
2486 error = -ENODEV;
2487 goto fail_hw_stop;
2488 }
2489
2490 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) {
2491 error = hid_hw_open(hdev);
2492 if (error) {
2493 hid_err(hdev, "hw open failed\n");
2494 goto fail_hw_stop;
2495 }
2496 }
2497
2498 wacom_set_shared_values(wacom_wac);
2499 devres_close_group(&hdev->dev, wacom);
2500
2501 return 0;
2502
2503fail_hw_stop:
2504 hid_hw_stop(hdev);
2505fail:
2506 wacom_release_resources(wacom);
2507 return error;
2508}
2509
2510static void wacom_wireless_work(struct work_struct *work)
2511{
2512 struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2513 struct usb_device *usbdev = wacom->usbdev;
2514 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2515 struct hid_device *hdev1, *hdev2;
2516 struct wacom *wacom1, *wacom2;
2517 struct wacom_wac *wacom_wac1, *wacom_wac2;
2518 int error;
2519
2520 /*
2521 * Regardless if this is a disconnect or a new tablet,
2522 * remove any existing input and battery devices.
2523 */
2524
2525 wacom_destroy_battery(wacom);
2526
2527 if (!usbdev)
2528 return;
2529
2530 /* Stylus interface */
2531 hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2532 wacom1 = hid_get_drvdata(hdev1);
2533 wacom_wac1 = &(wacom1->wacom_wac);
2534 wacom_release_resources(wacom1);
2535
2536 /* Touch interface */
2537 hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2538 wacom2 = hid_get_drvdata(hdev2);
2539 wacom_wac2 = &(wacom2->wacom_wac);
2540 wacom_release_resources(wacom2);
2541
2542 if (wacom_wac->pid == 0) {
2543 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2544 } else {
2545 const struct hid_device_id *id = wacom_ids;
2546
2547 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2548 wacom_wac->pid);
2549
2550 while (id->bus) {
2551 if (id->vendor == USB_VENDOR_ID_WACOM &&
2552 id->product == wacom_wac->pid)
2553 break;
2554 id++;
2555 }
2556
2557 if (!id->bus) {
2558 hid_info(wacom->hdev, "ignoring unknown PID.\n");
2559 return;
2560 }
2561
2562 /* Stylus interface */
2563 wacom_wac1->features =
2564 *((struct wacom_features *)id->driver_data);
2565
2566 wacom_wac1->pid = wacom_wac->pid;
2567 hid_hw_stop(hdev1);
2568 error = wacom_parse_and_register(wacom1, true);
2569 if (error)
2570 goto fail;
2571
2572 /* Touch interface */
2573 if (wacom_wac1->features.touch_max ||
2574 (wacom_wac1->features.type >= INTUOSHT &&
2575 wacom_wac1->features.type <= BAMBOO_PT)) {
2576 wacom_wac2->features =
2577 *((struct wacom_features *)id->driver_data);
2578 wacom_wac2->pid = wacom_wac->pid;
2579 hid_hw_stop(hdev2);
2580 error = wacom_parse_and_register(wacom2, true);
2581 if (error)
2582 goto fail;
2583 }
2584
2585 if (strscpy(wacom_wac->name, wacom_wac1->name,
2586 sizeof(wacom_wac->name)) < 0) {
2587 hid_warn(wacom->hdev, "String overflow while assembling device name");
2588 }
2589 }
2590
2591 return;
2592
2593fail:
2594 wacom_release_resources(wacom1);
2595 wacom_release_resources(wacom2);
2596 return;
2597}
2598
2599static void wacom_remote_destroy_battery(struct wacom *wacom, int index)
2600{
2601 struct wacom_remote *remote = wacom->remote;
2602
2603 if (remote->remotes[index].battery.battery) {
2604 devres_release_group(&wacom->hdev->dev,
2605 &remote->remotes[index].battery.bat_desc);
2606 remote->remotes[index].battery.battery = NULL;
2607 remote->remotes[index].active_time = 0;
2608 }
2609}
2610
2611static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2612{
2613 struct wacom_remote *remote = wacom->remote;
2614 u32 serial = remote->remotes[index].serial;
2615 int i;
2616 unsigned long flags;
2617
2618 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2619 if (remote->remotes[i].serial == serial) {
2620
2621 spin_lock_irqsave(&remote->remote_lock, flags);
2622 remote->remotes[i].registered = false;
2623 spin_unlock_irqrestore(&remote->remote_lock, flags);
2624
2625 wacom_remote_destroy_battery(wacom, i);
2626
2627 if (remote->remotes[i].group.name)
2628 devres_release_group(&wacom->hdev->dev,
2629 &remote->remotes[i]);
2630
2631 remote->remotes[i].serial = 0;
2632 remote->remotes[i].group.name = NULL;
2633 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2634 }
2635 }
2636}
2637
2638static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2639 unsigned int index)
2640{
2641 struct wacom_remote *remote = wacom->remote;
2642 struct device *dev = &wacom->hdev->dev;
2643 int error, k;
2644
2645 /* A remote can pair more than once with an EKR,
2646 * check to make sure this serial isn't already paired.
2647 */
2648 for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2649 if (remote->remotes[k].serial == serial)
2650 break;
2651 }
2652
2653 if (k < WACOM_MAX_REMOTES) {
2654 remote->remotes[index].serial = serial;
2655 return 0;
2656 }
2657
2658 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2659 return -ENOMEM;
2660
2661 error = wacom_remote_create_attr_group(wacom, serial, index);
2662 if (error)
2663 goto fail;
2664
2665 remote->remotes[index].input = wacom_allocate_input(wacom);
2666 if (!remote->remotes[index].input) {
2667 error = -ENOMEM;
2668 goto fail;
2669 }
2670 remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2671 remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2672
2673 if (!remote->remotes[index].input->name) {
2674 error = -EINVAL;
2675 goto fail;
2676 }
2677
2678 error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2679 &wacom->wacom_wac);
2680 if (error)
2681 goto fail;
2682
2683 remote->remotes[index].serial = serial;
2684
2685 error = input_register_device(remote->remotes[index].input);
2686 if (error)
2687 goto fail;
2688
2689 error = wacom_led_groups_alloc_and_register_one(
2690 &remote->remotes[index].input->dev,
2691 wacom, index, 3, true);
2692 if (error)
2693 goto fail;
2694
2695 remote->remotes[index].registered = true;
2696
2697 devres_close_group(dev, &remote->remotes[index]);
2698 return 0;
2699
2700fail:
2701 devres_release_group(dev, &remote->remotes[index]);
2702 remote->remotes[index].serial = 0;
2703 return error;
2704}
2705
2706static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2707{
2708 struct wacom_remote *remote = wacom->remote;
2709 int error;
2710
2711 if (!remote->remotes[index].registered)
2712 return 0;
2713
2714 if (remote->remotes[index].battery.battery)
2715 return 0;
2716
2717 if (!remote->remotes[index].active_time)
2718 return 0;
2719
2720 if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2721 return 0;
2722
2723 error = __wacom_initialize_battery(wacom,
2724 &wacom->remote->remotes[index].battery);
2725 if (error)
2726 return error;
2727
2728 return 0;
2729}
2730
2731static void wacom_remote_work(struct work_struct *work)
2732{
2733 struct wacom *wacom = container_of(work, struct wacom, remote_work);
2734 struct wacom_remote *remote = wacom->remote;
2735 ktime_t kt = ktime_get();
2736 struct wacom_remote_work_data remote_work_data;
2737 unsigned long flags;
2738 unsigned int count;
2739 u32 work_serial;
2740 int i;
2741
2742 spin_lock_irqsave(&remote->remote_lock, flags);
2743
2744 count = kfifo_out(&remote->remote_fifo, &remote_work_data,
2745 sizeof(remote_work_data));
2746
2747 if (count != sizeof(remote_work_data)) {
2748 hid_err(wacom->hdev,
2749 "workitem triggered without status available\n");
2750 spin_unlock_irqrestore(&remote->remote_lock, flags);
2751 return;
2752 }
2753
2754 if (!kfifo_is_empty(&remote->remote_fifo))
2755 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2756
2757 spin_unlock_irqrestore(&remote->remote_lock, flags);
2758
2759 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2760 work_serial = remote_work_data.remote[i].serial;
2761 if (work_serial) {
2762
2763 if (kt - remote->remotes[i].active_time > WACOM_REMOTE_BATTERY_TIMEOUT
2764 && remote->remotes[i].active_time != 0)
2765 wacom_remote_destroy_battery(wacom, i);
2766
2767 if (remote->remotes[i].serial == work_serial) {
2768 wacom_remote_attach_battery(wacom, i);
2769 continue;
2770 }
2771
2772 if (remote->remotes[i].serial)
2773 wacom_remote_destroy_one(wacom, i);
2774
2775 wacom_remote_create_one(wacom, work_serial, i);
2776
2777 } else if (remote->remotes[i].serial) {
2778 wacom_remote_destroy_one(wacom, i);
2779 }
2780 }
2781}
2782
2783static void wacom_mode_change_work(struct work_struct *work)
2784{
2785 struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
2786 struct wacom_shared *shared = wacom->wacom_wac.shared;
2787 struct wacom *wacom1 = NULL;
2788 struct wacom *wacom2 = NULL;
2789 bool is_direct = wacom->wacom_wac.is_direct_mode;
2790 int error = 0;
2791
2792 if (shared->pen) {
2793 wacom1 = hid_get_drvdata(shared->pen);
2794 wacom_release_resources(wacom1);
2795 hid_hw_stop(wacom1->hdev);
2796 wacom1->wacom_wac.has_mode_change = true;
2797 wacom1->wacom_wac.is_direct_mode = is_direct;
2798 }
2799
2800 if (shared->touch) {
2801 wacom2 = hid_get_drvdata(shared->touch);
2802 wacom_release_resources(wacom2);
2803 hid_hw_stop(wacom2->hdev);
2804 wacom2->wacom_wac.has_mode_change = true;
2805 wacom2->wacom_wac.is_direct_mode = is_direct;
2806 }
2807
2808 if (wacom1) {
2809 error = wacom_parse_and_register(wacom1, false);
2810 if (error)
2811 return;
2812 }
2813
2814 if (wacom2) {
2815 error = wacom_parse_and_register(wacom2, false);
2816 if (error)
2817 return;
2818 }
2819
2820 return;
2821}
2822
2823static int wacom_probe(struct hid_device *hdev,
2824 const struct hid_device_id *id)
2825{
2826 struct wacom *wacom;
2827 struct wacom_wac *wacom_wac;
2828 struct wacom_features *features;
2829 int error;
2830
2831 if (!id->driver_data)
2832 return -EINVAL;
2833
2834 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2835
2836 /* hid-core sets this quirk for the boot interface */
2837 hdev->quirks &= ~HID_QUIRK_NOGET;
2838
2839 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2840 if (!wacom)
2841 return -ENOMEM;
2842
2843 hid_set_drvdata(hdev, wacom);
2844 wacom->hdev = hdev;
2845
2846 wacom_wac = &wacom->wacom_wac;
2847 wacom_wac->features = *((struct wacom_features *)id->driver_data);
2848 features = &wacom_wac->features;
2849
2850 if (features->check_for_hid_type && features->hid_type != hdev->type)
2851 return -ENODEV;
2852
2853 wacom_wac->hid_data.inputmode = -1;
2854 wacom_wac->hid_data.inputmode_field_index = -1;
2855 wacom_wac->mode_report = -1;
2856
2857 if (hid_is_usb(hdev)) {
2858 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2859 struct usb_device *dev = interface_to_usbdev(intf);
2860
2861 wacom->usbdev = dev;
2862 wacom->intf = intf;
2863 }
2864
2865 mutex_init(&wacom->lock);
2866 INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
2867 INIT_DELAYED_WORK(&wacom->aes_battery_work, wacom_aes_battery_handler);
2868 INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2869 INIT_WORK(&wacom->battery_work, wacom_battery_work);
2870 INIT_WORK(&wacom->remote_work, wacom_remote_work);
2871 INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
2872 timer_setup(&wacom->idleprox_timer, &wacom_idleprox_timeout, TIMER_DEFERRABLE);
2873
2874 /* ask for the report descriptor to be loaded by HID */
2875 error = hid_parse(hdev);
2876 if (error) {
2877 hid_err(hdev, "parse failed\n");
2878 return error;
2879 }
2880
2881 if (features->type == BOOTLOADER) {
2882 hid_warn(hdev, "Using device in hidraw-only mode");
2883 return hid_hw_start(hdev, HID_CONNECT_HIDRAW);
2884 }
2885
2886 error = wacom_parse_and_register(wacom, false);
2887 if (error)
2888 return error;
2889
2890 if (hdev->bus == BUS_BLUETOOTH) {
2891 error = device_create_file(&hdev->dev, &dev_attr_speed);
2892 if (error)
2893 hid_warn(hdev,
2894 "can't create sysfs speed attribute err: %d\n",
2895 error);
2896 }
2897
2898 wacom_wac->probe_complete = true;
2899 return 0;
2900}
2901
2902static void wacom_remove(struct hid_device *hdev)
2903{
2904 struct wacom *wacom = hid_get_drvdata(hdev);
2905 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2906 struct wacom_features *features = &wacom_wac->features;
2907
2908 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2909 hid_hw_close(hdev);
2910
2911 hid_hw_stop(hdev);
2912
2913 cancel_delayed_work_sync(&wacom->init_work);
2914 cancel_delayed_work_sync(&wacom->aes_battery_work);
2915 cancel_work_sync(&wacom->wireless_work);
2916 cancel_work_sync(&wacom->battery_work);
2917 cancel_work_sync(&wacom->remote_work);
2918 cancel_work_sync(&wacom->mode_change_work);
2919 timer_delete_sync(&wacom->idleprox_timer);
2920 if (hdev->bus == BUS_BLUETOOTH)
2921 device_remove_file(&hdev->dev, &dev_attr_speed);
2922
2923 /* make sure we don't trigger the LEDs */
2924 wacom_led_groups_release(wacom);
2925
2926 if (wacom->wacom_wac.features.type != REMOTE)
2927 wacom_release_resources(wacom);
2928}
2929
2930static int wacom_resume(struct hid_device *hdev)
2931{
2932 struct wacom *wacom = hid_get_drvdata(hdev);
2933
2934 mutex_lock(&wacom->lock);
2935
2936 /* switch to wacom mode first */
2937 _wacom_query_tablet_data(wacom);
2938 wacom_led_control(wacom);
2939
2940 mutex_unlock(&wacom->lock);
2941
2942 return 0;
2943}
2944
2945static int wacom_reset_resume(struct hid_device *hdev)
2946{
2947 return wacom_resume(hdev);
2948}
2949
2950static struct hid_driver wacom_driver = {
2951 .name = "wacom",
2952 .id_table = wacom_ids,
2953 .probe = wacom_probe,
2954 .remove = wacom_remove,
2955 .report = wacom_wac_report,
2956 .resume = pm_ptr(wacom_resume),
2957 .reset_resume = pm_ptr(wacom_reset_resume),
2958 .raw_event = wacom_raw_event,
2959};
2960module_hid_driver(wacom_driver);
2961
2962MODULE_VERSION(DRIVER_VERSION);
2963MODULE_AUTHOR(DRIVER_AUTHOR);
2964MODULE_DESCRIPTION(DRIVER_DESC);
2965MODULE_LICENSE("GPL");