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