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ibmvnic: Fix cleanup of SKB's on driver close
[mirror_ubuntu-bionic-kernel.git] / drivers / hid / wacom_sys.c
CommitLineData
3bea733a 1/*
4104d13f 2 * drivers/input/tablet/wacom_sys.c
3bea733a 3 *
232f5693 4 * USB Wacom tablet support - system specific code
3bea733a
PC		 5 */
6
7/*
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
3bea733a 14#include "wacom_wac.h"
51269fe8 15#include "wacom.h"
b58ba1ba 16#include <linux/input/mt.h>
3bea733a 17
a417ea44 18#define WAC_MSG_RETRIES 5
5d7e7d47
EH		 19#define WAC_CMD_RETRIES 10
20
e0984bc3
PC		 21#define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
22#define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
72b236d6 23#define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
e0984bc3 24
c64d8834
PC		 25static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
26 size_t size, unsigned int retries)
3bea733a 27{
5d7e7d47
EH		 28 int retval;
29
30 do {
c64d8834 31 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
27b20a9d 32 HID_REQ_GET_REPORT);
aef3156d
JG		 33 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
34
35 if (retval < 0)
36 hid_err(hdev, "wacom_get_report: ran out of retries "
37 "(last error = %d)\n", retval);
5d7e7d47
EH		 38
39 return retval;
3bea733a
PC		 40}
41
296b7378
PF		 42static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
43 size_t size, unsigned int retries)
3bea733a 44{
5d7e7d47
EH		 45 int retval;
46
47 do {
296b7378 48 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
27b20a9d 49 HID_REQ_SET_REPORT);
aef3156d
JG		 50 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
51
52 if (retval < 0)
53 hid_err(hdev, "wacom_set_report: ran out of retries "
54 "(last error = %d)\n", retval);
5d7e7d47
EH		 55
56 return retval;
3bea733a
PC		 57}
58
29b47391
BT		 59static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
60 u8 *raw_data, int size)
3bea733a 61{
29b47391 62 struct wacom *wacom = hid_get_drvdata(hdev);
3bea733a 63
29b47391
BT		 64 if (size > WACOM_PKGLEN_MAX)
65 return 1;
3bea733a 66
29b47391 67 memcpy(wacom->wacom_wac.data, raw_data, size);
3bea733a 68
29b47391
BT		 69 wacom_wac_irq(&wacom->wacom_wac, size);
70
71 return 0;
3bea733a
PC		 72}
73
3bea733a
PC		 74static int wacom_open(struct input_dev *dev)
75{
7791bdae 76 struct wacom *wacom = input_get_drvdata(dev);
29b47391 77
dff67416 78 return hid_hw_open(wacom->hdev);
3bea733a
PC		 79}
80
81static void wacom_close(struct input_dev *dev)
82{
7791bdae 83 struct wacom *wacom = input_get_drvdata(dev);
3bea733a 84
3dad188e
BT		 85 /*
86 * wacom->hdev should never be null, but surprisingly, I had the case
87 * once while unplugging the Wacom Wireless Receiver.
88 */
89 if (wacom->hdev)
90 hid_hw_close(wacom->hdev);
3bea733a
PC		 91}
92
115d5e12 93/*
198fdee2 94 * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
115d5e12
JG		 95 */
96static int wacom_calc_hid_res(int logical_extents, int physical_extents,
c669fb2b 97 unsigned unit, int exponent)
115d5e12 98{
198fdee2
BT		 99 struct hid_field field = {
100 .logical_maximum = logical_extents,
101 .physical_maximum = physical_extents,
102 .unit = unit,
103 .unit_exponent = exponent,
104 };
105
106 return hidinput_calc_abs_res(&field, ABS_X);
115d5e12
JG		 107}
108
c669fb2b
BT		 109static void wacom_feature_mapping(struct hid_device *hdev,
110 struct hid_field *field, struct hid_usage *usage)
f393ee2b 111{
c669fb2b
BT		 112 struct wacom *wacom = hid_get_drvdata(hdev);
113 struct wacom_features *features = &wacom->wacom_wac.features;
5ae6e89f 114 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
ac2423c9 115 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
8ffffd52
BT		 116 u8 *data;
117 int ret;
345857bb 118 int n;
f393ee2b 119
ac2423c9 120 switch (equivalent_usage) {
c669fb2b
BT		 121 case HID_DG_CONTACTMAX:
122 /* leave touch_max as is if predefined */
8ffffd52
BT		 123 if (!features->touch_max) {
124 /* read manually */
125 data = kzalloc(2, GFP_KERNEL);
126 if (!data)
127 break;
128 data[0] = field->report->id;
129 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
05e8fd92
JG		 130 data, 2, WAC_CMD_RETRIES);
131 if (ret == 2) {
8ffffd52 132 features->touch_max = data[1];
05e8fd92
JG		 133 } else {
134 features->touch_max = 16;
135 hid_warn(hdev, "wacom_feature_mapping: "
136 "could not get HID_DG_CONTACTMAX, "
137 "defaulting to %d\n",
138 features->touch_max);
139 }
8ffffd52
BT		 140 kfree(data);
141 }
c669fb2b 142 break;
5ae6e89f
BT		 143 case HID_DG_INPUTMODE:
144 /* Ignore if value index is out of bounds. */
145 if (usage->usage_index >= field->report_count) {
146 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
147 break;
148 }
149
150 hid_data->inputmode = field->report->id;
151 hid_data->inputmode_index = usage->usage_index;
152 break;
326ea2a9
JG		 153
154 case HID_UP_DIGITIZER:
155 if (field->report->id == 0x0B &&
8de82280
JG		 156 (field->application == WACOM_HID_G9_PEN ||
157 field->application == WACOM_HID_G11_PEN)) {
326ea2a9
JG		 158 wacom->wacom_wac.mode_report = field->report->id;
159 wacom->wacom_wac.mode_value = 0;
160 }
161 break;
162
c9c09587
JG		 163 case WACOM_HID_WD_DATAMODE:
164 wacom->wacom_wac.mode_report = field->report->id;
165 wacom->wacom_wac.mode_value = 2;
166 break;
167
8de82280
JG		 168 case WACOM_HID_UP_G9:
169 case WACOM_HID_UP_G11:
326ea2a9 170 if (field->report->id == 0x03 &&
8de82280
JG		 171 (field->application == WACOM_HID_G9_TOUCHSCREEN ||
172 field->application == WACOM_HID_G11_TOUCHSCREEN)) {
326ea2a9
JG		 173 wacom->wacom_wac.mode_report = field->report->id;
174 wacom->wacom_wac.mode_value = 0;
175 }
176 break;
345857bb
JG		 177 case WACOM_HID_WD_OFFSETLEFT:
178 case WACOM_HID_WD_OFFSETTOP:
179 case WACOM_HID_WD_OFFSETRIGHT:
180 case WACOM_HID_WD_OFFSETBOTTOM:
181 /* read manually */
182 n = hid_report_len(field->report);
183 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
184 if (!data)
185 break;
186 data[0] = field->report->id;
187 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
188 data, n, WAC_CMD_RETRIES);
189 if (ret == n) {
190 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
191 data, n, 0);
192 } else {
193 hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
194 __func__);
195 }
196 kfree(data);
197 break;
f393ee2b
PC		 198 }
199}
200
428f8588
CB		 201/*
202 * Interface Descriptor of wacom devices can be incomplete and
203 * inconsistent so wacom_features table is used to store stylus
204 * device's packet lengths, various maximum values, and tablet
205 * resolution based on product ID's.
206 *
207 * For devices that contain 2 interfaces, wacom_features table is
208 * inaccurate for the touch interface. Since the Interface Descriptor
209 * for touch interfaces has pretty complete data, this function exists
210 * to query tablet for this missing information instead of hard coding in
211 * an additional table.
212 *
213 * A typical Interface Descriptor for a stylus will contain a
214 * boot mouse application collection that is not of interest and this
215 * function will ignore it.
216 *
217 * It also contains a digitizer application collection that also is not
218 * of interest since any information it contains would be duplicate
219 * of what is in wacom_features. Usually it defines a report of an array
220 * of bytes that could be used as max length of the stylus packet returned.
221 * If it happens to define a Digitizer-Stylus Physical Collection then
222 * the X and Y logical values contain valid data but it is ignored.
223 *
224 * A typical Interface Descriptor for a touch interface will contain a
225 * Digitizer-Finger Physical Collection which will define both logical
226 * X/Y maximum as well as the physical size of tablet. Since touch
227 * interfaces haven't supported pressure or distance, this is enough
228 * information to override invalid values in the wacom_features table.
4134361a 229 *
c669fb2b
BT		 230 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
231 * data. We deal with them after returning from this function.
428f8588 232 */
c669fb2b
BT		 233static void wacom_usage_mapping(struct hid_device *hdev,
234 struct hid_field *field, struct hid_usage *usage)
545f4e99 235{
c669fb2b
BT		 236 struct wacom *wacom = hid_get_drvdata(hdev);
237 struct wacom_features *features = &wacom->wacom_wac.features;
d97a5522
BT		 238 bool finger = WACOM_FINGER_FIELD(field);
239 bool pen = WACOM_PEN_FIELD(field);
e9fc413f 240
c669fb2b
BT		 241 /*
242 * Requiring Stylus Usage will ignore boot mouse
243 * X/Y values and some cases of invalid Digitizer X/Y
244 * values commonly reported.
245 */
042628ab 246 if (pen)
aa86b18c 247 features->device_type |= WACOM_DEVICETYPE_PEN;
042628ab 248 else if (finger)
aa86b18c 249 features->device_type |= WACOM_DEVICETYPE_TOUCH;
042628ab 250 else
c669fb2b
BT		 251 return;
252
30ebc1ae
PC		 253 /*
254 * Bamboo models do not support HID_DG_CONTACTMAX.
255 * And, Bamboo Pen only descriptor contains touch.
256 */
3b164a00 257 if (features->type > BAMBOO_PT) {
30ebc1ae
PC		 258 /* ISDv4 touch devices at least supports one touch point */
259 if (finger && !features->touch_max)
260 features->touch_max = 1;
261 }
c669fb2b 262
6005a13c
JG		 263 /*
264 * ISDv4 devices which predate HID's adoption of the
265 * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
266 * position instead. We can accurately detect if a
267 * usage with that value should be HID_DG_BARRELSWITCH2
268 * based on the surrounding usages, which have remained
269 * constant across generations.
270 */
271 if (features->type == HID_GENERIC &&
272 usage->hid == 0x000D0000 &&
273 field->application == HID_DG_PEN &&
274 field->physical == HID_DG_STYLUS) {
275 int i = usage->usage_index;
276
277 if (i-4 >= 0 && i+1 < field->maxusage &&
278 field->usage[i-4].hid == HID_DG_TIPSWITCH &&
279 field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
280 field->usage[i-2].hid == HID_DG_ERASER &&
281 field->usage[i-1].hid == HID_DG_INVERT &&
282 field->usage[i+1].hid == HID_DG_INRANGE) {
283 usage->hid = HID_DG_BARRELSWITCH2;
284 }
285 }
286
c669fb2b
BT		 287 switch (usage->hid) {
288 case HID_GD_X:
289 features->x_max = field->logical_maximum;
290 if (finger) {
c669fb2b 291 features->x_phy = field->physical_maximum;
3b164a00
PC		 292 if ((features->type != BAMBOO_PT) &&
293 (features->type != BAMBOO_TOUCH)) {
c669fb2b
BT		 294 features->unit = field->unit;
295 features->unitExpo = field->unit_exponent;
545f4e99 296 }
c669fb2b
BT		 297 }
298 break;
299 case HID_GD_Y:
300 features->y_max = field->logical_maximum;
301 if (finger) {
302 features->y_phy = field->physical_maximum;
3b164a00
PC		 303 if ((features->type != BAMBOO_PT) &&
304 (features->type != BAMBOO_TOUCH)) {
c669fb2b
BT		 305 features->unit = field->unit;
306 features->unitExpo = field->unit_exponent;
307 }
308 }
309 break;
310 case HID_DG_TIPPRESSURE:
311 if (pen)
312 features->pressure_max = field->logical_maximum;
313 break;
314 }
7704ac93
BT		 315
316 if (features->type == HID_GENERIC)
317 wacom_wac_usage_mapping(hdev, field, usage);
c669fb2b 318}
4134361a 319
b58ba1ba
JG		 320static void wacom_post_parse_hid(struct hid_device *hdev,
321 struct wacom_features *features)
322{
323 struct wacom *wacom = hid_get_drvdata(hdev);
324 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
325
326 if (features->type == HID_GENERIC) {
327 /* Any last-minute generic device setup */
4082da80
BT		 328 if (wacom_wac->has_mode_change) {
329 if (wacom_wac->is_direct_mode)
330 features->device_type |= WACOM_DEVICETYPE_DIRECT;
331 else
332 features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
333 }
334
b58ba1ba 335 if (features->touch_max > 1) {
ac2423c9
AAS		 336 if (features->device_type & WACOM_DEVICETYPE_DIRECT)
337 input_mt_init_slots(wacom_wac->touch_input,
338 wacom_wac->features.touch_max,
339 INPUT_MT_DIRECT);
340 else
341 input_mt_init_slots(wacom_wac->touch_input,
342 wacom_wac->features.touch_max,
343 INPUT_MT_POINTER);
b58ba1ba
JG		 344 }
345 }
346}
347
c669fb2b
BT		 348static void wacom_parse_hid(struct hid_device *hdev,
349 struct wacom_features *features)
350{
351 struct hid_report_enum *rep_enum;
352 struct hid_report *hreport;
353 int i, j;
354
355 /* check features first */
356 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
357 list_for_each_entry(hreport, &rep_enum->report_list, list) {
358 for (i = 0; i < hreport->maxfield; i++) {
359 /* Ignore if report count is out of bounds. */
360 if (hreport->field[i]->report_count < 1)
361 continue;
362
363 for (j = 0; j < hreport->field[i]->maxusage; j++) {
364 wacom_feature_mapping(hdev, hreport->field[i],
365 hreport->field[i]->usage + j);
4134361a 366 }
545f4e99
PC		 367 }
368 }
369
c669fb2b
BT		 370 /* now check the input usages */
371 rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
372 list_for_each_entry(hreport, &rep_enum->report_list, list) {
373
374 if (!hreport->maxfield)
375 continue;
376
377 for (i = 0; i < hreport->maxfield; i++)
378 for (j = 0; j < hreport->field[i]->maxusage; j++)
379 wacom_usage_mapping(hdev, hreport->field[i],
380 hreport->field[i]->usage + j);
381 }
b58ba1ba
JG		 382
383 wacom_post_parse_hid(hdev, features);
545f4e99
PC		 384}
385
5ae6e89f
BT		 386static int wacom_hid_set_device_mode(struct hid_device *hdev)
387{
388 struct wacom *wacom = hid_get_drvdata(hdev);
389 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
390 struct hid_report *r;
391 struct hid_report_enum *re;
392
393 if (hid_data->inputmode < 0)
394 return 0;
395
396 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
397 r = re->report_id_hash[hid_data->inputmode];
398 if (r) {
399 r->field[0]->value[hid_data->inputmode_index] = 2;
400 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
401 }
402 return 0;
403}
404
326ea2a9
JG		 405static int wacom_set_device_mode(struct hid_device *hdev,
406 struct wacom_wac *wacom_wac)
3b7307c2 407{
326ea2a9
JG		 408 u8 *rep_data;
409 struct hid_report *r;
410 struct hid_report_enum *re;
411 int length;
fe494bc2 412 int error = -ENOMEM, limit = 0;
3b7307c2 413
326ea2a9
JG		 414 if (wacom_wac->mode_report < 0)
415 return 0;
416
417 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
418 r = re->report_id_hash[wacom_wac->mode_report];
419 if (!r)
420 return -EINVAL;
421
422 rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
3b7307c2 423 if (!rep_data)
326ea2a9
JG		 424 return -ENOMEM;
425
426 length = hid_report_len(r);
ec67bbed 427
fe494bc2 428 do {
326ea2a9
JG		 429 rep_data[0] = wacom_wac->mode_report;
430 rep_data[1] = wacom_wac->mode_value;
9937c026 431
296b7378
PF		 432 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
433 length, 1);
3cb83157 434 if (error >= 0)
27b20a9d 435 error = wacom_get_report(hdev, HID_FEATURE_REPORT,
c64d8834 436 rep_data, length, 1);
326ea2a9
JG		 437 } while (error >= 0 &&
438 rep_data[1] != wacom_wac->mode_report &&
439 limit++ < WAC_MSG_RETRIES);
fe494bc2
JG		 440
441 kfree(rep_data);
442
443 return error < 0 ? error : 0;
444}
445
f81a1295
BT		 446static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
447 struct wacom_features *features)
448{
387142bb
BT		 449 struct wacom *wacom = hid_get_drvdata(hdev);
450 int ret;
451 u8 rep_data[2];
452
453 switch (features->type) {
454 case GRAPHIRE_BT:
455 rep_data[0] = 0x03;
456 rep_data[1] = 0x00;
296b7378
PF		 457 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
458 3);
387142bb
BT		 459
460 if (ret >= 0) {
461 rep_data[0] = speed == 0 ? 0x05 : 0x06;
462 rep_data[1] = 0x00;
463
464 ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
296b7378 465 rep_data, 2, 3);
387142bb
BT		 466
467 if (ret >= 0) {
468 wacom->wacom_wac.bt_high_speed = speed;
469 return 0;
470 }
471 }
472
473 /*
474 * Note that if the raw queries fail, it's not a hard failure
475 * and it is safe to continue
476 */
477 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
478 rep_data[0], ret);
479 break;
81af7e61
BT		 480 case INTUOS4WL:
481 if (speed == 1)
482 wacom->wacom_wac.bt_features &= ~0x20;
483 else
484 wacom->wacom_wac.bt_features |= 0x20;
485
486 rep_data[0] = 0x03;
487 rep_data[1] = wacom->wacom_wac.bt_features;
488
296b7378
PF		 489 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
490 1);
81af7e61
BT		 491 if (ret >= 0)
492 wacom->wacom_wac.bt_high_speed = speed;
493 break;
387142bb
BT		 494 }
495
f81a1295
BT		 496 return 0;
497}
498
fe494bc2
JG		 499/*
500 * Switch the tablet into its most-capable mode. Wacom tablets are
501 * typically configured to power-up in a mode which sends mouse-like
502 * reports to the OS. To get absolute position, pressure data, etc.
503 * from the tablet, it is necessary to switch the tablet out of this
504 * mode and into one which sends the full range of tablet data.
505 */
a544c619 506static int _wacom_query_tablet_data(struct wacom *wacom)
fe494bc2 507{
a544c619 508 struct hid_device *hdev = wacom->hdev;
326ea2a9 509 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
a544c619 510 struct wacom_features *features = &wacom_wac->features;
326ea2a9 511
f81a1295
BT		 512 if (hdev->bus == BUS_BLUETOOTH)
513 return wacom_bt_query_tablet_data(hdev, 1, features);
514
326ea2a9
JG		 515 if (features->type != HID_GENERIC) {
516 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
517 if (features->type > TABLETPC) {
518 /* MT Tablet PC touch */
519 wacom_wac->mode_report = 3;
520 wacom_wac->mode_value = 4;
521 } else if (features->type == WACOM_24HDT) {
522 wacom_wac->mode_report = 18;
523 wacom_wac->mode_value = 2;
524 } else if (features->type == WACOM_27QHDT) {
525 wacom_wac->mode_report = 131;
526 wacom_wac->mode_value = 2;
527 } else if (features->type == BAMBOO_PAD) {
528 wacom_wac->mode_report = 2;
529 wacom_wac->mode_value = 2;
530 }
531 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
532 if (features->type <= BAMBOO_PT) {
533 wacom_wac->mode_report = 2;
534 wacom_wac->mode_value = 2;
535 }
1963518b 536 }
ec67bbed 537 }
3b7307c2 538
326ea2a9
JG		 539 wacom_set_device_mode(hdev, wacom_wac);
540
541 if (features->type == HID_GENERIC)
542 return wacom_hid_set_device_mode(hdev);
543
fe494bc2 544 return 0;
3b7307c2
DT		 545}
546
c669fb2b 547static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
1963518b 548 struct wacom_features *features)
ec67bbed 549{
27b20a9d
BT		 550 struct wacom *wacom = hid_get_drvdata(hdev);
551 struct usb_interface *intf = wacom->intf;
ec67bbed 552
fed87e65 553 /* default features */
fed87e65
HR		 554 features->x_fuzz = 4;
555 features->y_fuzz = 4;
556 features->pressure_fuzz = 0;
bef7e200
JG		 557 features->distance_fuzz = 1;
558 features->tilt_fuzz = 1;
ec67bbed 559
d3825d51
CB		 560 /*
561 * The wireless device HID is basic and layout conflicts with
562 * other tablets (monitor and touch interface can look like pen).
563 * Skip the query for this type and modify defaults based on
564 * interface number.
565 */
566 if (features->type == WIRELESS) {
3f14a63a 567 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
ccad85cc 568 features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
3f14a63a 569 else
aa86b18c 570 features->device_type = WACOM_DEVICETYPE_NONE;
3f14a63a 571 return;
d3825d51
CB		 572 }
573
c669fb2b 574 wacom_parse_hid(hdev, features);
ec67bbed
PC		 575}
576
4451e088 577struct wacom_hdev_data {
4492efff
PC		 578 struct list_head list;
579 struct kref kref;
4451e088 580 struct hid_device *dev;
4492efff
PC		 581 struct wacom_shared shared;
582};
583
584static LIST_HEAD(wacom_udev_list);
585static DEFINE_MUTEX(wacom_udev_list_lock);
586
41372d5d
JG		 587static bool compare_device_paths(struct hid_device *hdev_a,
588 struct hid_device *hdev_b, char separator)
589{
590 int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
591 int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
592
593 if (n1 != n2 || n1 <= 0 || n2 <= 0)
594 return false;
595
596 return !strncmp(hdev_a->phys, hdev_b->phys, n1);
597}
598
4451e088
BT		 599static bool wacom_are_sibling(struct hid_device *hdev,
600 struct hid_device *sibling)
aea2bf6a 601{
4451e088
BT		 602 struct wacom *wacom = hid_get_drvdata(hdev);
603 struct wacom_features *features = &wacom->wacom_wac.features;
41372d5d
JG		 604 struct wacom *sibling_wacom = hid_get_drvdata(sibling);
605 struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
606 __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
607 __u32 oPid = features->oPid ? features->oPid : hdev->product;
4451e088 608
41372d5d
JG		 609 /* The defined oVid/oPid must match that of the sibling */
610 if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
611 return false;
612 if (features->oPid != HID_ANY_ID && sibling->product != oPid)
613 return false;
614
615 /*
616 * Devices with the same VID/PID must share the same physical
617 * device path, while those with different VID/PID must share
618 * the same physical parent device path.
619 */
620 if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
621 if (!compare_device_paths(hdev, sibling, '/'))
622 return false;
623 } else {
624 if (!compare_device_paths(hdev, sibling, '.'))
625 return false;
4451e088 626 }
aea2bf6a 627
41372d5d
JG		 628 /* Skip the remaining heuristics unless you are a HID_GENERIC device */
629 if (features->type != HID_GENERIC)
630 return true;
631
632 /*
633 * Direct-input devices may not be siblings of indirect-input
634 * devices.
635 */
636 if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
637 !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
4451e088 638 return false;
aea2bf6a 639
41372d5d
JG		 640 /*
641 * Indirect-input devices may not be siblings of direct-input
642 * devices.
643 */
644 if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
645 (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
4451e088 646 return false;
aea2bf6a 647
41372d5d
JG		 648 /* Pen devices may only be siblings of touch devices */
649 if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
650 !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
651 return false;
652
653 /* Touch devices may only be siblings of pen devices */
654 if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
655 !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
656 return false;
657
658 /*
659 * No reason could be found for these two devices to NOT be
660 * siblings, so there's a good chance they ARE siblings
661 */
662 return true;
aea2bf6a
JG		 663}
664
4451e088 665static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
4492efff 666{
4451e088 667 struct wacom_hdev_data *data;
4492efff 668
41372d5d
JG		 669 /* Try to find an already-probed interface from the same device */
670 list_for_each_entry(data, &wacom_udev_list, list) {
671 if (compare_device_paths(hdev, data->dev, '/'))
672 return data;
673 }
674
675 /* Fallback to finding devices that appear to be "siblings" */
4492efff 676 list_for_each_entry(data, &wacom_udev_list, list) {
4451e088 677 if (wacom_are_sibling(hdev, data->dev)) {
4492efff
PC		 678 kref_get(&data->kref);
679 return data;
680 }
681 }
682
683 return NULL;
684}
685
1c817c83
BT		 686static void wacom_release_shared_data(struct kref *kref)
687{
688 struct wacom_hdev_data *data =
689 container_of(kref, struct wacom_hdev_data, kref);
690
691 mutex_lock(&wacom_udev_list_lock);
692 list_del(&data->list);
693 mutex_unlock(&wacom_udev_list_lock);
694
695 kfree(data);
696}
697
698static void wacom_remove_shared_data(void *res)
699{
700 struct wacom *wacom = res;
701 struct wacom_hdev_data *data;
702 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
703
704 if (wacom_wac->shared) {
705 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
706 shared);
707
708 if (wacom_wac->shared->touch == wacom->hdev)
709 wacom_wac->shared->touch = NULL;
710 else if (wacom_wac->shared->pen == wacom->hdev)
711 wacom_wac->shared->pen = NULL;
712
713 kref_put(&data->kref, wacom_release_shared_data);
714 wacom_wac->shared = NULL;
715 }
716}
717
4451e088 718static int wacom_add_shared_data(struct hid_device *hdev)
4492efff 719{
4451e088
BT		 720 struct wacom *wacom = hid_get_drvdata(hdev);
721 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
722 struct wacom_hdev_data *data;
4492efff
PC		 723 int retval = 0;
724
725 mutex_lock(&wacom_udev_list_lock);
726
4451e088 727 data = wacom_get_hdev_data(hdev);
4492efff 728 if (!data) {
4451e088 729 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
4492efff
PC		 730 if (!data) {
731 retval = -ENOMEM;
732 goto out;
733 }
734
735 kref_init(&data->kref);
4451e088 736 data->dev = hdev;
4492efff
PC		 737 list_add_tail(&data->list, &wacom_udev_list);
738 }
739
4451e088 740 wacom_wac->shared = &data->shared;
4492efff 741
1c817c83
BT		 742 retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
743 if (retval) {
744 mutex_unlock(&wacom_udev_list_lock);
745 wacom_remove_shared_data(wacom);
746 return retval;
747 }
748
a9ce7856
JG		 749 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
750 wacom_wac->shared->touch = hdev;
751 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
752 wacom_wac->shared->pen = hdev;
753
4492efff
PC		 754out:
755 mutex_unlock(&wacom_udev_list_lock);
756 return retval;
757}
758
5d7e7d47
EH		 759static int wacom_led_control(struct wacom *wacom)
760{
761 unsigned char *buf;
9b5b95dd 762 int retval;
912ca216
PC		 763 unsigned char report_id = WAC_CMD_LED_CONTROL;
764 int buf_size = 9;
5d7e7d47 765
a50aac71
BT		 766 if (!wacom->led.groups)
767 return -ENOTSUPP;
768
912ca216
PC		 769 if (wacom->wacom_wac.pid) { /* wireless connected */
770 report_id = WAC_CMD_WL_LED_CONTROL;
771 buf_size = 13;
772 }
4922cd26
JG		 773 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
774 report_id = WAC_CMD_WL_INTUOSP2;
775 buf_size = 51;
776 }
912ca216 777 buf = kzalloc(buf_size, GFP_KERNEL);
5d7e7d47
EH		 778 if (!buf)
779 return -ENOMEM;
780
10c55cac
AAS		 781 if (wacom->wacom_wac.features.type == HID_GENERIC) {
782 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
783 buf[1] = wacom->led.llv;
784 buf[2] = wacom->led.groups[0].select & 0x03;
785
786 } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
787 wacom->wacom_wac.features.type <= INTUOSPL)) {
9b5b95dd
JG		 788 /*
789 * Touch Ring and crop mark LED luminance may take on
790 * one of four values:
791 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
792 */
a50aac71 793 int ring_led = wacom->led.groups[0].select & 0x03;
9b5b95dd
JG		 794 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
795 int crop_lum = 0;
912ca216
PC		 796 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
797
798 buf[0] = report_id;
799 if (wacom->wacom_wac.pid) {
800 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
801 buf, buf_size, WAC_CMD_RETRIES);
802 buf[0] = report_id;
803 buf[4] = led_bits;
804 } else
805 buf[1] = led_bits;
9b5b95dd 806 }
4922cd26
JG		 807 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
808 buf[0] = report_id;
809 buf[4] = 100; // Power Connection LED (ORANGE)
810 buf[5] = 100; // BT Connection LED (BLUE)
811 buf[6] = 100; // Paper Mode (RED?)
812 buf[7] = 100; // Paper Mode (GREEN?)
813 buf[8] = 100; // Paper Mode (BLUE?)
814 buf[9] = wacom->led.llv;
815 buf[10] = wacom->led.groups[0].select & 0x03;
816 }
9b5b95dd 817 else {
a50aac71 818 int led = wacom->led.groups[0].select | 0x4;
9b5b95dd
JG		 819
820 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
821 wacom->wacom_wac.features.type == WACOM_24HD)
a50aac71 822 led |= (wacom->led.groups[1].select << 4) | 0x40;
9b5b95dd 823
912ca216 824 buf[0] = report_id;
9b5b95dd
JG		 825 buf[1] = led;
826 buf[2] = wacom->led.llv;
827 buf[3] = wacom->led.hlv;
828 buf[4] = wacom->led.img_lum;
829 }
5d7e7d47 830
912ca216 831 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
296b7378 832 WAC_CMD_RETRIES);
5d7e7d47
EH		 833 kfree(buf);
834
835 return retval;
836}
837
849e2f06
BT		 838static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
839 const unsigned len, const void *img)
5d7e7d47
EH		 840{
841 unsigned char *buf;
842 int i, retval;
849e2f06 843 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
5d7e7d47 844
849e2f06 845 buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
5d7e7d47
EH		 846 if (!buf)
847 return -ENOMEM;
848
849 /* Send 'start' command */
850 buf[0] = WAC_CMD_ICON_START;
851 buf[1] = 1;
296b7378
PF		 852 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
853 WAC_CMD_RETRIES);
5d7e7d47
EH		 854 if (retval < 0)
855 goto out;
856
849e2f06 857 buf[0] = xfer_id;
5d7e7d47
EH		 858 buf[1] = button_id & 0x07;
859 for (i = 0; i < 4; i++) {
860 buf[2] = i;
849e2f06 861 memcpy(buf + 3, img + i * chunk_len, chunk_len);
5d7e7d47 862
27b20a9d 863 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
296b7378 864 buf, chunk_len + 3, WAC_CMD_RETRIES);
5d7e7d47
EH		 865 if (retval < 0)
866 break;
867 }
868
869 /* Send 'stop' */
870 buf[0] = WAC_CMD_ICON_START;
871 buf[1] = 0;
296b7378
PF		 872 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
873 WAC_CMD_RETRIES);
5d7e7d47
EH		 874
875out:
876 kfree(buf);
877 return retval;
878}
879
09e7d941 880static ssize_t wacom_led_select_store(struct device *dev, int set_id,
5d7e7d47
EH		 881 const char *buf, size_t count)
882{
ee79a8f8 883 struct hid_device *hdev = to_hid_device(dev);
29b47391 884 struct wacom *wacom = hid_get_drvdata(hdev);
5d7e7d47
EH		 885 unsigned int id;
886 int err;
887
888 err = kstrtouint(buf, 10, &id);
889 if (err)
890 return err;
891
892 mutex_lock(&wacom->lock);
893
a50aac71 894 wacom->led.groups[set_id].select = id & 0x3;
5d7e7d47
EH		 895 err = wacom_led_control(wacom);
896
897 mutex_unlock(&wacom->lock);
898
899 return err < 0 ? err : count;
900}
901
09e7d941
PC		 902#define DEVICE_LED_SELECT_ATTR(SET_ID) \
903static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
904 struct device_attribute *attr, const char *buf, size_t count) \
905{ \
906 return wacom_led_select_store(dev, SET_ID, buf, count); \
907} \
04c59abd
PC		 908static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
909 struct device_attribute *attr, char *buf) \
910{ \
ee79a8f8 911 struct hid_device *hdev = to_hid_device(dev);\
29b47391 912 struct wacom *wacom = hid_get_drvdata(hdev); \
37449adc 913 return scnprintf(buf, PAGE_SIZE, "%d\n", \
a50aac71 914 wacom->led.groups[SET_ID].select); \
04c59abd 915} \
e0984bc3 916static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \
04c59abd 917 wacom_led##SET_ID##_select_show, \
09e7d941
PC		 918 wacom_led##SET_ID##_select_store)
919
920DEVICE_LED_SELECT_ATTR(0);
921DEVICE_LED_SELECT_ATTR(1);
5d7e7d47
EH		 922
923static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
924 const char *buf, size_t count)
925{
926 unsigned int value;
927 int err;
928
929 err = kstrtouint(buf, 10, &value);
930 if (err)
931 return err;
932
933 mutex_lock(&wacom->lock);
934
935 *dest = value & 0x7f;
936 err = wacom_led_control(wacom);
937
938 mutex_unlock(&wacom->lock);
939
940 return err < 0 ? err : count;
941}
942
943#define DEVICE_LUMINANCE_ATTR(name, field) \
944static ssize_t wacom_##name##_luminance_store(struct device *dev, \
945 struct device_attribute *attr, const char *buf, size_t count) \
946{ \
ee79a8f8 947 struct hid_device *hdev = to_hid_device(dev);\
29b47391 948 struct wacom *wacom = hid_get_drvdata(hdev); \
5d7e7d47
EH		 949 \
950 return wacom_luminance_store(wacom, &wacom->led.field, \
951 buf, count); \
952} \
37449adc
PC		 953static ssize_t wacom_##name##_luminance_show(struct device *dev, \
954 struct device_attribute *attr, char *buf) \
955{ \
956 struct wacom *wacom = dev_get_drvdata(dev); \
957 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \
958} \
e0984bc3 959static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \
37449adc
PC		 960 wacom_##name##_luminance_show, \
961 wacom_##name##_luminance_store)
5d7e7d47
EH		 962
963DEVICE_LUMINANCE_ATTR(status0, llv);
964DEVICE_LUMINANCE_ATTR(status1, hlv);
965DEVICE_LUMINANCE_ATTR(buttons, img_lum);
966
967static ssize_t wacom_button_image_store(struct device *dev, int button_id,
968 const char *buf, size_t count)
969{
ee79a8f8 970 struct hid_device *hdev = to_hid_device(dev);
29b47391 971 struct wacom *wacom = hid_get_drvdata(hdev);
5d7e7d47 972 int err;
849e2f06
BT		 973 unsigned len;
974 u8 xfer_id;
975
976 if (hdev->bus == BUS_BLUETOOTH) {
977 len = 256;
978 xfer_id = WAC_CMD_ICON_BT_XFER;
979 } else {
980 len = 1024;
981 xfer_id = WAC_CMD_ICON_XFER;
982 }
5d7e7d47 983
849e2f06 984 if (count != len)
5d7e7d47
EH		 985 return -EINVAL;
986
987 mutex_lock(&wacom->lock);
988
849e2f06 989 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
5d7e7d47
EH		 990
991 mutex_unlock(&wacom->lock);
992
993 return err < 0 ? err : count;
994}
995
996#define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
997static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
998 struct device_attribute *attr, const char *buf, size_t count) \
999{ \
1000 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
1001} \
e0984bc3 1002static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \
5d7e7d47
EH		 1003 NULL, wacom_btnimg##BUTTON_ID##_store)
1004
1005DEVICE_BTNIMG_ATTR(0);
1006DEVICE_BTNIMG_ATTR(1);
1007DEVICE_BTNIMG_ATTR(2);
1008DEVICE_BTNIMG_ATTR(3);
1009DEVICE_BTNIMG_ATTR(4);
1010DEVICE_BTNIMG_ATTR(5);
1011DEVICE_BTNIMG_ATTR(6);
1012DEVICE_BTNIMG_ATTR(7);
1013
09e7d941
PC		 1014static struct attribute *cintiq_led_attrs[] = {
1015 &dev_attr_status_led0_select.attr,
1016 &dev_attr_status_led1_select.attr,
1017 NULL
1018};
1019
1020static struct attribute_group cintiq_led_attr_group = {
1021 .name = "wacom_led",
1022 .attrs = cintiq_led_attrs,
1023};
1024
1025static struct attribute *intuos4_led_attrs[] = {
5d7e7d47
EH		 1026 &dev_attr_status0_luminance.attr,
1027 &dev_attr_status1_luminance.attr,
09e7d941 1028 &dev_attr_status_led0_select.attr,
5d7e7d47
EH		 1029 &dev_attr_buttons_luminance.attr,
1030 &dev_attr_button0_rawimg.attr,
1031 &dev_attr_button1_rawimg.attr,
1032 &dev_attr_button2_rawimg.attr,
1033 &dev_attr_button3_rawimg.attr,
1034 &dev_attr_button4_rawimg.attr,
1035 &dev_attr_button5_rawimg.attr,
1036 &dev_attr_button6_rawimg.attr,
1037 &dev_attr_button7_rawimg.attr,
1038 NULL
1039};
1040
09e7d941 1041static struct attribute_group intuos4_led_attr_group = {
5d7e7d47 1042 .name = "wacom_led",
09e7d941 1043 .attrs = intuos4_led_attrs,
5d7e7d47
EH		 1044};
1045
9b5b95dd
JG		 1046static struct attribute *intuos5_led_attrs[] = {
1047 &dev_attr_status0_luminance.attr,
1048 &dev_attr_status_led0_select.attr,
1049 NULL
1050};
1051
1052static struct attribute_group intuos5_led_attr_group = {
1053 .name = "wacom_led",
1054 .attrs = intuos5_led_attrs,
1055};
1056
10c55cac
AAS		 1057static struct attribute *generic_led_attrs[] = {
1058 &dev_attr_status0_luminance.attr,
1059 &dev_attr_status_led0_select.attr,
1060 NULL
1061};
1062
1063static struct attribute_group generic_led_attr_group = {
1064 .name = "wacom_led",
1065 .attrs = generic_led_attrs,
1066};
1067
2df68a88
BT		 1068struct wacom_sysfs_group_devres {
1069 struct attribute_group *group;
1070 struct kobject *root;
1071};
1072
1073static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1074{
1075 struct wacom_sysfs_group_devres *devres = res;
1076 struct kobject *kobj = devres->root;
1077
1078 dev_dbg(dev, "%s: dropping reference to %s\n",
1079 __func__, devres->group->name);
1080 sysfs_remove_group(kobj, devres->group);
1081}
1082
f9036bd4
BT		 1083static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1084 struct kobject *root,
1085 struct attribute_group *group)
2df68a88
BT		 1086{
1087 struct wacom_sysfs_group_devres *devres;
1088 int error;
1089
1090 devres = devres_alloc(wacom_devm_sysfs_group_release,
1091 sizeof(struct wacom_sysfs_group_devres),
1092 GFP_KERNEL);
1093 if (!devres)
1094 return -ENOMEM;
1095
1096 devres->group = group;
f9036bd4 1097 devres->root = root;
2df68a88
BT		 1098
1099 error = sysfs_create_group(devres->root, group);
1100 if (error)
1101 return error;
1102
1103 devres_add(&wacom->hdev->dev, devres);
1104
1105 return 0;
1106}
1107
f9036bd4
BT		 1108static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1109 struct attribute_group *group)
1110{
1111 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1112 group);
1113}
1114
34736aa9 1115enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
97f5541f
BT		 1116{
1117 struct wacom *wacom = led->wacom;
1118
1119 if (wacom->led.max_hlv)
1120 return led->hlv * LED_FULL / wacom->led.max_hlv;
1121
1122 if (wacom->led.max_llv)
1123 return led->llv * LED_FULL / wacom->led.max_llv;
1124
1125 /* device doesn't support brightness tuning */
1126 return LED_FULL;
1127}
1128
1129static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1130{
1131 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1132 struct wacom *wacom = led->wacom;
1133
1134 if (wacom->led.groups[led->group].select != led->id)
1135 return LED_OFF;
1136
1137 return wacom_leds_brightness_get(led);
1138}
1139
1140static int wacom_led_brightness_set(struct led_classdev *cdev,
1141 enum led_brightness brightness)
1142{
1143 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1144 struct wacom *wacom = led->wacom;
1145 int error;
1146
1147 mutex_lock(&wacom->lock);
1148
1149 if (!wacom->led.groups || (brightness == LED_OFF &&
1150 wacom->led.groups[led->group].select != led->id)) {
1151 error = 0;
1152 goto out;
1153 }
1154
1155 led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1156 led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1157
1158 wacom->led.groups[led->group].select = led->id;
1159
1160 error = wacom_led_control(wacom);
1161
1162out:
1163 mutex_unlock(&wacom->lock);
1164
1165 return error;
1166}
1167
1168static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1169 enum led_brightness brightness)
1170{
1171}
1172
1173static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1174 struct wacom_led *led, unsigned int group,
1175 unsigned int id, bool read_only)
1176{
1177 int error;
1178 char *name;
1179
1180 name = devm_kasprintf(dev, GFP_KERNEL,
1181 "%s::wacom-%d.%d",
1182 dev_name(dev),
1183 group,
1184 id);
1185 if (!name)
1186 return -ENOMEM;
1187
34736aa9
BT		 1188 if (!read_only) {
1189 led->trigger.name = name;
1190 error = devm_led_trigger_register(dev, &led->trigger);
1191 if (error) {
1192 hid_err(wacom->hdev,
1193 "failed to register LED trigger %s: %d\n",
1194 led->cdev.name, error);
1195 return error;
1196 }
1197 }
1198
97f5541f
BT		 1199 led->group = group;
1200 led->id = id;
1201 led->wacom = wacom;
1202 led->llv = wacom->led.llv;
1203 led->hlv = wacom->led.hlv;
1204 led->cdev.name = name;
1205 led->cdev.max_brightness = LED_FULL;
1206 led->cdev.flags = LED_HW_PLUGGABLE;
1207 led->cdev.brightness_get = __wacom_led_brightness_get;
34736aa9 1208 if (!read_only) {
97f5541f 1209 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
34736aa9
BT		 1210 led->cdev.default_trigger = led->cdev.name;
1211 } else {
97f5541f 1212 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
34736aa9 1213 }
97f5541f
BT		 1214
1215 error = devm_led_classdev_register(dev, &led->cdev);
1216 if (error) {
1217 hid_err(wacom->hdev,
1218 "failed to register LED %s: %d\n",
1219 led->cdev.name, error);
1220 led->cdev.name = NULL;
1221 return error;
1222 }
1223
1224 return 0;
1225}
1226
589e5060
BT		 1227static void wacom_led_groups_release_one(void *data)
1228{
1229 struct wacom_group_leds *group = data;
1230
1231 devres_release_group(group->dev, group);
1232}
1233
97f5541f
BT		 1234static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1235 struct wacom *wacom,
1236 int group_id, int count,
1237 bool read_only)
1238{
1239 struct wacom_led *leds;
1240 int i, error;
1241
1242 if (group_id >= wacom->led.count || count <= 0)
1243 return -EINVAL;
1244
1245 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1246 return -ENOMEM;
1247
1248 leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL);
1249 if (!leds) {
1250 error = -ENOMEM;
1251 goto err;
1252 }
1253
1254 wacom->led.groups[group_id].leds = leds;
1255 wacom->led.groups[group_id].count = count;
1256
1257 for (i = 0; i < count; i++) {
1258 error = wacom_led_register_one(dev, wacom, &leds[i],
1259 group_id, i, read_only);
1260 if (error)
1261 goto err;
1262 }
1263
589e5060
BT		 1264 wacom->led.groups[group_id].dev = dev;
1265
1266 devres_close_group(dev, &wacom->led.groups[group_id]);
1267
1268 /*
1269 * There is a bug (?) in devm_led_classdev_register() in which its
1270 * increments the refcount of the parent. If the parent is an input
1271 * device, that means the ref count never reaches 0 when
1272 * devm_input_device_release() gets called.
1273 * This means that the LEDs are still there after disconnect.
1274 * Manually force the release of the group so that the leds are released
1275 * once we are done using them.
1276 */
1277 error = devm_add_action_or_reset(&wacom->hdev->dev,
1278 wacom_led_groups_release_one,
1279 &wacom->led.groups[group_id]);
1280 if (error)
1281 return error;
1282
97f5541f
BT		 1283 return 0;
1284
1285err:
1286 devres_release_group(dev, &wacom->led.groups[group_id]);
1287 return error;
1288}
1289
34736aa9
BT		 1290struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1291 unsigned int id)
1292{
1293 struct wacom_group_leds *group;
1294
1295 if (group_id >= wacom->led.count)
1296 return NULL;
1297
1298 group = &wacom->led.groups[group_id];
1299
1300 if (!group->leds)
1301 return NULL;
1302
1303 id %= group->count;
1304
1305 return &group->leds[id];
1306}
1307
1308/**
1309 * wacom_led_next: gives the next available led with a wacom trigger.
1310 *
1311 * returns the next available struct wacom_led which has its default trigger
1312 * or the current one if none is available.
1313 */
1314struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1315{
1316 struct wacom_led *next_led;
1317 int group, next;
1318
1319 if (!wacom || !cur)
1320 return NULL;
1321
1322 group = cur->group;
1323 next = cur->id;
1324
1325 do {
1326 next_led = wacom_led_find(wacom, group, ++next);
1327 if (!next_led || next_led == cur)
1328 return next_led;
1329 } while (next_led->cdev.trigger != &next_led->trigger);
1330
1331 return next_led;
1332}
1333
a50aac71
BT		 1334static void wacom_led_groups_release(void *data)
1335{
1336 struct wacom *wacom = data;
1337
1338 wacom->led.groups = NULL;
97f5541f 1339 wacom->led.count = 0;
a50aac71
BT		 1340}
1341
1342static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1343{
97f5541f 1344 struct device *dev = &wacom->hdev->dev;
a50aac71
BT		 1345 struct wacom_group_leds *groups;
1346 int error;
1347
97f5541f 1348 groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
a50aac71
BT		 1349 GFP_KERNEL);
1350 if (!groups)
1351 return -ENOMEM;
1352
97f5541f 1353 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
a50aac71
BT		 1354 if (error)
1355 return error;
1356
1357 wacom->led.groups = groups;
97f5541f
BT		 1358 wacom->led.count = count;
1359
1360 return 0;
1361}
1362
1363static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1364 int led_per_group, bool read_only)
1365{
1366 struct device *dev;
1367 int i, error;
1368
1369 if (!wacom->wacom_wac.pad_input)
1370 return -EINVAL;
1371
1372 dev = &wacom->wacom_wac.pad_input->dev;
1373
1374 error = wacom_led_groups_allocate(wacom, group_count);
1375 if (error)
1376 return error;
1377
1378 for (i = 0; i < group_count; i++) {
1379 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1380 led_per_group,
1381 read_only);
1382 if (error)
1383 return error;
1384 }
a50aac71
BT		 1385
1386 return 0;
1387}
1388
10c55cac 1389int wacom_initialize_leds(struct wacom *wacom)
5d7e7d47
EH		 1390{
1391 int error;
1392
862cf553
JG		 1393 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1394 return 0;
1395
09e7d941
PC		 1396 /* Initialize default values */
1397 switch (wacom->wacom_wac.features.type) {
10c55cac
AAS		 1398 case HID_GENERIC:
1399 if (!wacom->generic_has_leds)
1400 return 0;
1401 wacom->led.llv = 100;
1402 wacom->led.max_llv = 100;
1403
1404 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1405 if (error) {
1406 hid_err(wacom->hdev,
1407 "cannot create leds err: %d\n", error);
1408 return error;
1409 }
1410
1411 error = wacom_devm_sysfs_create_group(wacom,
1412 &generic_led_attr_group);
1413 break;
1414
a19fc986 1415 case INTUOS4S:
09e7d941 1416 case INTUOS4:
81af7e61 1417 case INTUOS4WL:
09e7d941 1418 case INTUOS4L:
f4fa9a6d 1419 wacom->led.llv = 10;
5d7e7d47 1420 wacom->led.hlv = 20;
97f5541f
BT		 1421 wacom->led.max_llv = 127;
1422 wacom->led.max_hlv = 127;
5d7e7d47 1423 wacom->led.img_lum = 10;
a50aac71 1424
97f5541f 1425 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
a50aac71
BT		 1426 if (error) {
1427 hid_err(wacom->hdev,
1428 "cannot create leds err: %d\n", error);
1429 return error;
1430 }
1431
2df68a88
BT		 1432 error = wacom_devm_sysfs_create_group(wacom,
1433 &intuos4_led_attr_group);
09e7d941
PC		 1434 break;
1435
246835fc 1436 case WACOM_24HD:
09e7d941 1437 case WACOM_21UX2:
09e7d941
PC		 1438 wacom->led.llv = 0;
1439 wacom->led.hlv = 0;
1440 wacom->led.img_lum = 0;
5d7e7d47 1441
97f5541f 1442 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
a50aac71
BT		 1443 if (error) {
1444 hid_err(wacom->hdev,
1445 "cannot create leds err: %d\n", error);
1446 return error;
1447 }
1448
2df68a88
BT		 1449 error = wacom_devm_sysfs_create_group(wacom,
1450 &cintiq_led_attr_group);
09e7d941
PC		 1451 break;
1452
9b5b95dd
JG		 1453 case INTUOS5S:
1454 case INTUOS5:
1455 case INTUOS5L:
9a35c411
PC		 1456 case INTUOSPS:
1457 case INTUOSPM:
1458 case INTUOSPL:
862cf553 1459 wacom->led.llv = 32;
97f5541f 1460 wacom->led.max_llv = 96;
862cf553 1461
97f5541f 1462 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
a50aac71
BT		 1463 if (error) {
1464 hid_err(wacom->hdev,
1465 "cannot create leds err: %d\n", error);
1466 return error;
1467 }
1468
2df68a88
BT		 1469 error = wacom_devm_sysfs_create_group(wacom,
1470 &intuos5_led_attr_group);
9b5b95dd
JG		 1471 break;
1472
4922cd26
JG		 1473 case INTUOSP2_BT:
1474 wacom->led.llv = 50;
1475 wacom->led.max_llv = 100;
1476 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1477 if (error) {
1478 hid_err(wacom->hdev,
1479 "cannot create leds err: %d\n", error);
1480 return error;
1481 }
1482 return 0;
1483
a50aac71 1484 case REMOTE:
97f5541f
BT		 1485 wacom->led.llv = 255;
1486 wacom->led.max_llv = 255;
a50aac71
BT		 1487 error = wacom_led_groups_allocate(wacom, 5);
1488 if (error) {
1489 hid_err(wacom->hdev,
1490 "cannot create leds err: %d\n", error);
1491 return error;
1492 }
1493 return 0;
1494
09e7d941
PC		 1495 default:
1496 return 0;
5d7e7d47
EH		 1497 }
1498
09e7d941 1499 if (error) {
c31a408f 1500 hid_err(wacom->hdev,
09e7d941
PC		 1501 "cannot create sysfs group err: %d\n", error);
1502 return error;
1503 }
09e7d941 1504
5d7e7d47
EH		 1505 return 0;
1506}
1507
a544c619
BT		 1508static void wacom_init_work(struct work_struct *work)
1509{
1510 struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1511
1512 _wacom_query_tablet_data(wacom);
1513 wacom_led_control(wacom);
1514}
1515
1516static void wacom_query_tablet_data(struct wacom *wacom)
1517{
1518 schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1519}
1520
a1d552cc 1521static enum power_supply_property wacom_battery_props[] = {
9956953e 1522 POWER_SUPPLY_PROP_MODEL_NAME,
71fa641e 1523 POWER_SUPPLY_PROP_PRESENT,
ac8d1010 1524 POWER_SUPPLY_PROP_STATUS,
6e2a6e80 1525 POWER_SUPPLY_PROP_SCOPE,
a1d552cc
CB		 1526 POWER_SUPPLY_PROP_CAPACITY
1527};
1528
1529static int wacom_battery_get_property(struct power_supply *psy,
1530 enum power_supply_property psp,
1531 union power_supply_propval *val)
1532{
59d69bc8 1533 struct wacom_battery *battery = power_supply_get_drvdata(psy);
a1d552cc
CB		 1534 int ret = 0;
1535
1536 switch (psp) {
9956953e
BT		 1537 case POWER_SUPPLY_PROP_MODEL_NAME:
1538 val->strval = battery->wacom->wacom_wac.name;
1539 break;
71fa641e 1540 case POWER_SUPPLY_PROP_PRESENT:
59d69bc8 1541 val->intval = battery->bat_connected;
71fa641e 1542 break;
6e2a6e80
BN		 1543 case POWER_SUPPLY_PROP_SCOPE:
1544 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1545 break;
a1d552cc 1546 case POWER_SUPPLY_PROP_CAPACITY:
59d69bc8 1547 val->intval = battery->battery_capacity;
ac8d1010
BT		 1548 break;
1549 case POWER_SUPPLY_PROP_STATUS:
59d69bc8 1550 if (battery->bat_charging)
ac8d1010 1551 val->intval = POWER_SUPPLY_STATUS_CHARGING;
59d69bc8
BT		 1552 else if (battery->battery_capacity == 100 &&
1553 battery->ps_connected)
ac8d1010 1554 val->intval = POWER_SUPPLY_STATUS_FULL;
59d69bc8 1555 else if (battery->ps_connected)
b0882cb7 1556 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
ac8d1010
BT		 1557 else
1558 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
a1d552cc
CB		 1559 break;
1560 default:
1561 ret = -EINVAL;
1562 break;
1563 }
1564
1565 return ret;
1566}
1567
59d69bc8
BT		 1568static int __wacom_initialize_battery(struct wacom *wacom,
1569 struct wacom_battery *battery)
a1d552cc 1570{
d70420b9 1571 static atomic_t battery_no = ATOMIC_INIT(0);
b189da90 1572 struct device *dev = &wacom->hdev->dev;
59d69bc8 1573 struct power_supply_config psy_cfg = { .drv_data = battery, };
136ae5e9 1574 struct power_supply *ps_bat;
59d69bc8 1575 struct power_supply_desc *bat_desc = &battery->bat_desc;
d70420b9 1576 unsigned long n;
b189da90
BT		 1577 int error;
1578
1579 if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1580 return -ENOMEM;
a1d552cc 1581
9956953e
BT		 1582 battery->wacom = wacom;
1583
59d69bc8
BT		 1584 n = atomic_inc_return(&battery_no) - 1;
1585
1586 bat_desc->properties = wacom_battery_props;
1587 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1588 bat_desc->get_property = wacom_battery_get_property;
1589 sprintf(battery->bat_name, "wacom_battery_%ld", n);
1590 bat_desc->name = battery->bat_name;
96983296 1591 bat_desc->type = POWER_SUPPLY_TYPE_USB;
59d69bc8
BT		 1592 bat_desc->use_for_apm = 0;
1593
59d69bc8
BT		 1594 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1595 if (IS_ERR(ps_bat)) {
1596 error = PTR_ERR(ps_bat);
1597 goto err;
1598 }
297d716f 1599
59d69bc8 1600 power_supply_powers(ps_bat, &wacom->hdev->dev);
7dbd229e 1601
59d69bc8 1602 battery->battery = ps_bat;
a1d552cc 1603
b189da90 1604 devres_close_group(dev, bat_desc);
7dbd229e 1605 return 0;
b189da90
BT		 1606
1607err:
1608 devres_release_group(dev, bat_desc);
1609 return error;
a1d552cc
CB		 1610}
1611
59d69bc8
BT		 1612static int wacom_initialize_battery(struct wacom *wacom)
1613{
1614 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1615 return __wacom_initialize_battery(wacom, &wacom->battery);
1616
1617 return 0;
1618}
1619
a1d552cc
CB		 1620static void wacom_destroy_battery(struct wacom *wacom)
1621{
59d69bc8
BT		 1622 if (wacom->battery.battery) {
1623 devres_release_group(&wacom->hdev->dev,
1624 &wacom->battery.bat_desc);
1625 wacom->battery.battery = NULL;
b7af2bb8 1626 }
a1d552cc
CB		 1627}
1628
f81a1295
BT		 1629static ssize_t wacom_show_speed(struct device *dev,
1630 struct device_attribute
1631 *attr, char *buf)
1632{
ee79a8f8 1633 struct hid_device *hdev = to_hid_device(dev);
f81a1295
BT		 1634 struct wacom *wacom = hid_get_drvdata(hdev);
1635
1636 return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1637}
1638
1639static ssize_t wacom_store_speed(struct device *dev,
1640 struct device_attribute *attr,
1641 const char *buf, size_t count)
1642{
ee79a8f8 1643 struct hid_device *hdev = to_hid_device(dev);
f81a1295
BT		 1644 struct wacom *wacom = hid_get_drvdata(hdev);
1645 u8 new_speed;
1646
1647 if (kstrtou8(buf, 0, &new_speed))
1648 return -EINVAL;
1649
1650 if (new_speed != 0 && new_speed != 1)
1651 return -EINVAL;
1652
1653 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1654
1655 return count;
1656}
1657
e0984bc3 1658static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
f81a1295
BT		 1659 wacom_show_speed, wacom_store_speed);
1660
72b236d6
AS		 1661
1662static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1663 struct kobj_attribute *kattr,
1664 char *buf, int index)
1665{
2cf83833 1666 struct device *dev = kobj_to_dev(kobj->parent);
ee79a8f8 1667 struct hid_device *hdev = to_hid_device(dev);
72b236d6
AS		 1668 struct wacom *wacom = hid_get_drvdata(hdev);
1669 u8 mode;
1670
a50aac71 1671 mode = wacom->led.groups[index].select;
72b236d6
AS		 1672 if (mode >= 0 && mode < 3)
1673 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
1674 else
1675 return snprintf(buf, PAGE_SIZE, "%d\n", -1);
1676}
1677
1678#define DEVICE_EKR_ATTR_GROUP(SET_ID) \
1679static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \
1680 struct kobj_attribute *kattr, char *buf) \
1681{ \
1682 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \
1683} \
1684static struct kobj_attribute remote##SET_ID##_mode_attr = { \
1685 .attr = {.name = "remote_mode", \
1686 .mode = DEV_ATTR_RO_PERM}, \
1687 .show = wacom_show_remote##SET_ID##_mode, \
1688}; \
1689static struct attribute *remote##SET_ID##_serial_attrs[] = { \
1690 &remote##SET_ID##_mode_attr.attr, \
1691 NULL \
1692}; \
1693static struct attribute_group remote##SET_ID##_serial_group = { \
1694 .name = NULL, \
1695 .attrs = remote##SET_ID##_serial_attrs, \
1696}
1697
1698DEVICE_EKR_ATTR_GROUP(0);
1699DEVICE_EKR_ATTR_GROUP(1);
1700DEVICE_EKR_ATTR_GROUP(2);
1701DEVICE_EKR_ATTR_GROUP(3);
1702DEVICE_EKR_ATTR_GROUP(4);
1703
e6f2813a
BT		 1704static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1705 int index)
72b236d6
AS		 1706{
1707 int error = 0;
83e6b40e 1708 struct wacom_remote *remote = wacom->remote;
72b236d6 1709
e7749f6e 1710 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
83e6b40e
BT		 1711 GFP_KERNEL,
1712 "%d", serial);
e7749f6e 1713 if (!remote->remotes[index].group.name)
72b236d6 1714 return -ENOMEM;
72b236d6 1715
f9036bd4 1716 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
e7749f6e 1717 &remote->remotes[index].group);
72b236d6 1718 if (error) {
e7749f6e 1719 remote->remotes[index].group.name = NULL;
72b236d6
AS		 1720 hid_err(wacom->hdev,
1721 "cannot create sysfs group err: %d\n", error);
72b236d6
AS		 1722 return error;
1723 }
1724
1725 return 0;
1726}
1727
72b236d6
AS		 1728static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1729{
1730 const size_t buf_size = 2;
1731 unsigned char *buf;
1732 int retval;
1733
1734 buf = kzalloc(buf_size, GFP_KERNEL);
1735 if (!buf)
1736 return -ENOMEM;
1737
1738 buf[0] = WAC_CMD_DELETE_PAIRING;
1739 buf[1] = selector;
1740
1741 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1742 buf_size, WAC_CMD_RETRIES);
1743 kfree(buf);
1744
1745 return retval;
1746}
1747
1748static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1749 struct kobj_attribute *attr,
1750 const char *buf, size_t count)
1751{
1752 unsigned char selector = 0;
2cf83833 1753 struct device *dev = kobj_to_dev(kobj->parent);
ee79a8f8 1754 struct hid_device *hdev = to_hid_device(dev);
72b236d6
AS		 1755 struct wacom *wacom = hid_get_drvdata(hdev);
1756 int err;
1757
1758 if (!strncmp(buf, "*\n", 2)) {
1759 selector = WAC_CMD_UNPAIR_ALL;
1760 } else {
1761 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1762 buf);
1763 return -1;
1764 }
1765
1766 mutex_lock(&wacom->lock);
1767
1768 err = wacom_cmd_unpair_remote(wacom, selector);
1769 mutex_unlock(&wacom->lock);
1770
1771 return err < 0 ? err : count;
1772}
1773
1774static struct kobj_attribute unpair_remote_attr = {
1775 .attr = {.name = "unpair_remote", .mode = 0200},
1776 .store = wacom_store_unpair_remote,
1777};
1778
1779static const struct attribute *remote_unpair_attrs[] = {
1780 &unpair_remote_attr.attr,
1781 NULL
1782};
1783
83e6b40e
BT		 1784static void wacom_remotes_destroy(void *data)
1785{
1786 struct wacom *wacom = data;
1787 struct wacom_remote *remote = wacom->remote;
1788
1789 if (!remote)
1790 return;
1791
1792 kobject_put(remote->remote_dir);
1793 kfifo_free(&remote->remote_fifo);
1794 wacom->remote = NULL;
1795}
1796
1797static int wacom_initialize_remotes(struct wacom *wacom)
72b236d6
AS		 1798{
1799 int error = 0;
83e6b40e 1800 struct wacom_remote *remote;
72b236d6
AS		 1801 int i;
1802
1803 if (wacom->wacom_wac.features.type != REMOTE)
1804 return 0;
1805
83e6b40e
BT		 1806 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1807 GFP_KERNEL);
1808 if (!remote)
1809 return -ENOMEM;
72b236d6 1810
83e6b40e
BT		 1811 wacom->remote = remote;
1812
1813 spin_lock_init(&remote->remote_lock);
1814
1815 error = kfifo_alloc(&remote->remote_fifo,
1816 5 * sizeof(struct wacom_remote_data),
1817 GFP_KERNEL);
1818 if (error) {
1819 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
72b236d6 1820 return -ENOMEM;
83e6b40e 1821 }
72b236d6 1822
e7749f6e
BT		 1823 remote->remotes[0].group = remote0_serial_group;
1824 remote->remotes[1].group = remote1_serial_group;
1825 remote->remotes[2].group = remote2_serial_group;
1826 remote->remotes[3].group = remote3_serial_group;
1827 remote->remotes[4].group = remote4_serial_group;
83e6b40e
BT		 1828
1829 remote->remote_dir = kobject_create_and_add("wacom_remote",
1830 &wacom->hdev->dev.kobj);
1831 if (!remote->remote_dir)
1832 return -ENOMEM;
1833
1834 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
72b236d6
AS		 1835
1836 if (error) {
1837 hid_err(wacom->hdev,
1838 "cannot create sysfs group err: %d\n", error);
1839 return error;
1840 }
1841
1842 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
a50aac71 1843 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
e7749f6e 1844 remote->remotes[i].serial = 0;
72b236d6
AS		 1845 }
1846
83e6b40e
BT		 1847 error = devm_add_action_or_reset(&wacom->hdev->dev,
1848 wacom_remotes_destroy, wacom);
1849 if (error)
1850 return error;
1851
72b236d6
AS		 1852 return 0;
1853}
1854
d2d13f18 1855static struct input_dev *wacom_allocate_input(struct wacom *wacom)
3aac0ef1
CB		 1856{
1857 struct input_dev *input_dev;
b6c79f2c 1858 struct hid_device *hdev = wacom->hdev;
3aac0ef1 1859 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
3aac0ef1 1860
3dad188e 1861 input_dev = devm_input_allocate_device(&hdev->dev);
d2d13f18
BT		 1862 if (!input_dev)
1863 return NULL;
3aac0ef1 1864
2bdd163c 1865 input_dev->name = wacom_wac->features.name;
b6c79f2c
BT		 1866 input_dev->phys = hdev->phys;
1867 input_dev->dev.parent = &hdev->dev;
3aac0ef1
CB		 1868 input_dev->open = wacom_open;
1869 input_dev->close = wacom_close;
b6c79f2c
BT		 1870 input_dev->uniq = hdev->uniq;
1871 input_dev->id.bustype = hdev->bus;
1872 input_dev->id.vendor = hdev->vendor;
12969e3b 1873 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
b6c79f2c 1874 input_dev->id.version = hdev->version;
3aac0ef1
CB		 1875 input_set_drvdata(input_dev, wacom);
1876
d2d13f18
BT		 1877 return input_dev;
1878}
1879
d9f2d203
JG		 1880static int wacom_allocate_inputs(struct wacom *wacom)
1881{
1882 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1883
1884 wacom_wac->pen_input = wacom_allocate_input(wacom);
1885 wacom_wac->touch_input = wacom_allocate_input(wacom);
1886 wacom_wac->pad_input = wacom_allocate_input(wacom);
3dad188e
BT		 1887 if (!wacom_wac->pen_input ||
1888 !wacom_wac->touch_input ||
1889 !wacom_wac->pad_input)
d9f2d203 1890 return -ENOMEM;
d9f2d203 1891
2bdd163c 1892 wacom_wac->pen_input->name = wacom_wac->pen_name;
d9f2d203
JG		 1893 wacom_wac->touch_input->name = wacom_wac->touch_name;
1894 wacom_wac->pad_input->name = wacom_wac->pad_name;
1895
1896 return 0;
1897}
1898
2546dacd
BT		 1899static int wacom_register_inputs(struct wacom *wacom)
1900{
2a6cdbdd 1901 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
2546dacd 1902 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2636a3f2 1903 int error = 0;
2546dacd 1904
2a6cdbdd
JG		 1905 pen_input_dev = wacom_wac->pen_input;
1906 touch_input_dev = wacom_wac->touch_input;
2546dacd
BT		 1907 pad_input_dev = wacom_wac->pad_input;
1908
2a6cdbdd 1909 if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
2546dacd
BT		 1910 return -EINVAL;
1911
2a6cdbdd
JG		 1912 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1913 if (error) {
1914 /* no pen in use on this interface */
1915 input_free_device(pen_input_dev);
1916 wacom_wac->pen_input = NULL;
1917 pen_input_dev = NULL;
1918 } else {
1919 error = input_register_device(pen_input_dev);
1920 if (error)
3dad188e 1921 goto fail;
2a6cdbdd
JG		 1922 }
1923
1924 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1925 if (error) {
1926 /* no touch in use on this interface */
1927 input_free_device(touch_input_dev);
1928 wacom_wac->touch_input = NULL;
1929 touch_input_dev = NULL;
1930 } else {
1931 error = input_register_device(touch_input_dev);
30ebc1ae 1932 if (error)
3dad188e 1933 goto fail;
30ebc1ae 1934 }
1963518b 1935
d2d13f18
BT		 1936 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1937 if (error) {
1938 /* no pad in use on this interface */
1939 input_free_device(pad_input_dev);
1940 wacom_wac->pad_input = NULL;
1941 pad_input_dev = NULL;
1942 } else {
1943 error = input_register_device(pad_input_dev);
1944 if (error)
3dad188e 1945 goto fail;
d2d13f18
BT		 1946 }
1947
1963518b 1948 return 0;
3aac0ef1 1949
3dad188e
BT		 1950fail:
1951 wacom_wac->pad_input = NULL;
2a6cdbdd 1952 wacom_wac->touch_input = NULL;
2a6cdbdd 1953 wacom_wac->pen_input = NULL;
3aac0ef1
CB		 1954 return error;
1955}
1956
0be01712
JG		 1957/*
1958 * Not all devices report physical dimensions from HID.
1959 * Compute the default from hardcoded logical dimension
1960 * and resolution before driver overwrites them.
1961 */
1962static void wacom_set_default_phy(struct wacom_features *features)
1963{
1964 if (features->x_resolution) {
1965 features->x_phy = (features->x_max * 100) /
1966 features->x_resolution;
1967 features->y_phy = (features->y_max * 100) /
1968 features->y_resolution;
1969 }
1970}
1971
1972static void wacom_calculate_res(struct wacom_features *features)
1973{
1974 /* set unit to "100th of a mm" for devices not reported by HID */
1975 if (!features->unit) {
1976 features->unit = 0x11;
1977 features->unitExpo = -3;
1978 }
1979
1980 features->x_resolution = wacom_calc_hid_res(features->x_max,
1981 features->x_phy,
1982 features->unit,
1983 features->unitExpo);
1984 features->y_resolution = wacom_calc_hid_res(features->y_max,
1985 features->y_phy,
1986 features->unit,
1987 features->unitExpo);
1988}
1989
fce9957d
JG		 1990void wacom_battery_work(struct work_struct *work)
1991{
d17d1f17 1992 struct wacom *wacom = container_of(work, struct wacom, battery_work);
fce9957d
JG		 1993
1994 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
59d69bc8 1995 !wacom->battery.battery) {
fce9957d
JG		 1996 wacom_initialize_battery(wacom);
1997 }
1998 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
59d69bc8 1999 wacom->battery.battery) {
fce9957d
JG		 2000 wacom_destroy_battery(wacom);
2001 }
2002}
2003
01c846f9
BT		 2004static size_t wacom_compute_pktlen(struct hid_device *hdev)
2005{
2006 struct hid_report_enum *report_enum;
2007 struct hid_report *report;
2008 size_t size = 0;
2009
2010 report_enum = hdev->report_enum + HID_INPUT_REPORT;
2011
2012 list_for_each_entry(report, &report_enum->report_list, list) {
dabb05c6 2013 size_t report_size = hid_report_len(report);
01c846f9
BT		 2014 if (report_size > size)
2015 size = report_size;
2016 }
2017
2018 return size;
2019}
2020
fd5f92b6 2021static void wacom_update_name(struct wacom *wacom, const char *suffix)
c24eab4e
PC		 2022{
2023 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2024 struct wacom_features *features = &wacom_wac->features;
44b5250b 2025 char name[WACOM_NAME_MAX];
c24eab4e
PC		 2026
2027 /* Generic devices name unspecified */
2028 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2029 if (strstr(wacom->hdev->name, "Wacom") ||
2030 strstr(wacom->hdev->name, "wacom") ||
2031 strstr(wacom->hdev->name, "WACOM")) {
2032 /* name is in HID descriptor, use it */
44b5250b 2033 strlcpy(name, wacom->hdev->name, sizeof(name));
c24eab4e
PC		 2034
2035 /* strip out excess whitespaces */
2036 while (1) {
44b5250b 2037 char *gap = strstr(name, " ");
c24eab4e
PC		 2038 if (gap == NULL)
2039 break;
2040 /* shift everything including the terminator */
2041 memmove(gap, gap+1, strlen(gap));
2042 }
f2209d4a
JG		 2043
2044 /* strip off excessive prefixing */
2045 if (strstr(name, "Wacom Co.,Ltd. Wacom ") == name) {
2046 int n = strlen(name);
2047 int x = strlen("Wacom Co.,Ltd. ");
2048 memmove(name, name+x, n-x+1);
2049 }
2050 if (strstr(name, "Wacom Co., Ltd. Wacom ") == name) {
2051 int n = strlen(name);
2052 int x = strlen("Wacom Co., Ltd. ");
2053 memmove(name, name+x, n-x+1);
2054 }
2055
c24eab4e 2056 /* get rid of trailing whitespace */
44b5250b
JG		 2057 if (name[strlen(name)-1] == ' ')
2058 name[strlen(name)-1] = '\0';
c24eab4e
PC		 2059 } else {
2060 /* no meaningful name retrieved. use product ID */
44b5250b 2061 snprintf(name, sizeof(name),
c24eab4e
PC		 2062 "%s %X", features->name, wacom->hdev->product);
2063 }
2064 } else {
44b5250b 2065 strlcpy(name, features->name, sizeof(name));
c24eab4e
PC		 2066 }
2067
9956953e
BT		 2068 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2069 name, suffix);
2070
c24eab4e 2071 /* Append the device type to the name */
2a6cdbdd 2072 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
fd5f92b6 2073 "%s%s Pen", name, suffix);
2a6cdbdd 2074 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
fd5f92b6 2075 "%s%s Finger", name, suffix);
c24eab4e 2076 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
fd5f92b6 2077 "%s%s Pad", name, suffix);
c24eab4e
PC		 2078}
2079
84dfbd7f
BT		 2080static void wacom_release_resources(struct wacom *wacom)
2081{
2082 struct hid_device *hdev = wacom->hdev;
2083
2084 if (!wacom->resources)
2085 return;
2086
2087 devres_release_group(&hdev->dev, wacom);
2088
2089 wacom->resources = false;
2090
2091 wacom->wacom_wac.pen_input = NULL;
2092 wacom->wacom_wac.touch_input = NULL;
2093 wacom->wacom_wac.pad_input = NULL;
2094}
2095
d2ec58ae
AAS		 2096static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
2097{
2098 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
2099 wacom_wac->shared->type = wacom_wac->features.type;
2100 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2101 }
2102
d793ff81 2103 if (wacom_wac->has_mute_touch_switch) {
d2ec58ae 2104 wacom_wac->shared->has_mute_touch_switch = true;
d793ff81
PC		 2105 wacom_wac->shared->is_touch_on = true;
2106 }
d2ec58ae
AAS		 2107
2108 if (wacom_wac->shared->has_mute_touch_switch &&
2109 wacom_wac->shared->touch_input) {
2110 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
2111 input_set_capability(wacom_wac->shared->touch_input, EV_SW,
2112 SW_MUTE_DEVICE);
2113 }
2114}
2115
fd5f92b6 2116static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
3bea733a 2117{
c58ac3a8
BT		 2118 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2119 struct wacom_features *features = &wacom_wac->features;
2120 struct hid_device *hdev = wacom->hdev;
e33da8a5 2121 int error;
7704ac93 2122 unsigned int connect_mask = HID_CONNECT_HIDRAW;
3bea733a 2123
01c846f9 2124 features->pktlen = wacom_compute_pktlen(hdev);
c58ac3a8
BT		 2125 if (features->pktlen > WACOM_PKGLEN_MAX)
2126 return -EINVAL;
3bea733a 2127
84dfbd7f
BT		 2128 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2129 return -ENOMEM;
2130
2131 wacom->resources = true;
2132
3f14a63a
JG		 2133 error = wacom_allocate_inputs(wacom);
2134 if (error)
3888b0d5 2135 goto fail;
494078b0 2136
8c97a765
BT		 2137 /*
2138 * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2139 * into debug mode for the touch part.
2140 * We ignore the other interfaces.
2141 */
2142 if (features->type == BAMBOO_PAD) {
2143 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2144 features->type = HID_GENERIC;
2145 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2146 (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2147 error = -ENODEV;
3888b0d5 2148 goto fail;
8c97a765
BT		 2149 }
2150 }
2151
401d7d10
PC		 2152 /* set the default size in case we do not get them from hid */
2153 wacom_set_default_phy(features);
2154
f393ee2b 2155 /* Retrieve the physical and logical size for touch devices */
c669fb2b 2156 wacom_retrieve_hid_descriptor(hdev, features);
42f4f272 2157 wacom_setup_device_quirks(wacom);
042628ab 2158
aa86b18c
JG		 2159 if (features->device_type == WACOM_DEVICETYPE_NONE &&
2160 features->type != WIRELESS) {
8e116d31
JG		 2161 error = features->type == HID_GENERIC ? -ENODEV : 0;
2162
042628ab 2163 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
8e116d31
JG		 2164 hdev->name,
2165 error ? "Ignoring" : "Assuming pen");
2166
2167 if (error)
3888b0d5 2168 goto fail;
042628ab 2169
aa86b18c 2170 features->device_type |= WACOM_DEVICETYPE_PEN;
042628ab
JG		 2171 }
2172
401d7d10
PC		 2173 wacom_calculate_res(features);
2174
fd5f92b6 2175 wacom_update_name(wacom, wireless ? " (WL)" : "");
4492efff 2176
8b407359
AAS		 2177 /* pen only Bamboo neither support touch nor pad */
2178 if ((features->type == BAMBOO_PEN) &&
2179 ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2180 (features->device_type & WACOM_DEVICETYPE_PAD))) {
2181 error = -ENODEV;
2182 goto fail;
2183 }
2184
a9ce7856
JG		 2185 error = wacom_add_shared_data(hdev);
2186 if (error)
2187 goto fail;
49b764ae 2188
ccad85cc 2189 if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
f81a1295
BT		 2190 (features->quirks & WACOM_QUIRK_BATTERY)) {
2191 error = wacom_initialize_battery(wacom);
2192 if (error)
3888b0d5 2193 goto fail;
f81a1295
BT		 2194 }
2195
3f14a63a
JG		 2196 error = wacom_register_inputs(wacom);
2197 if (error)
3888b0d5 2198 goto fail;
f81a1295 2199
b62f6465 2200 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
85d2c77b
BT		 2201 error = wacom_initialize_leds(wacom);
2202 if (error)
3888b0d5 2203 goto fail;
85d2c77b 2204
83e6b40e 2205 error = wacom_initialize_remotes(wacom);
b62f6465 2206 if (error)
3888b0d5 2207 goto fail;
b62f6465
BT		 2208 }
2209
7704ac93
BT		 2210 if (features->type == HID_GENERIC)
2211 connect_mask |= HID_CONNECT_DRIVER;
2212
29b47391 2213 /* Regular HID work starts now */
7704ac93 2214 error = hid_hw_start(hdev, connect_mask);
29b47391
BT		 2215 if (error) {
2216 hid_err(hdev, "hw start failed\n");
3888b0d5 2217 goto fail;
d3825d51 2218 }
961794a0 2219
fd5f92b6
BT		 2220 if (!wireless) {
2221 /* Note that if query fails it is not a hard failure */
a544c619 2222 wacom_query_tablet_data(wacom);
fd5f92b6 2223 }
86e88f0e
JG		 2224
2225 /* touch only Bamboo doesn't support pen */
2226 if ((features->type == BAMBOO_TOUCH) &&
2227 (features->device_type & WACOM_DEVICETYPE_PEN)) {
4d20c332
AAS		 2228 cancel_delayed_work_sync(&wacom->init_work);
2229 _wacom_query_tablet_data(wacom);
86e88f0e 2230 error = -ENODEV;
b62f6465 2231 goto fail_quirks;
86e88f0e
JG		 2232 }
2233
ccad85cc 2234 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
29b47391
BT		 2235 error = hid_hw_open(hdev);
2236
d2ec58ae 2237 wacom_set_shared_values(wacom_wac);
84dfbd7f
BT		 2238 devres_close_group(&hdev->dev, wacom);
2239
3bea733a
PC		 2240 return 0;
2241
b62f6465 2242fail_quirks:
c58ac3a8 2243 hid_hw_stop(hdev);
3888b0d5 2244fail:
84dfbd7f 2245 wacom_release_resources(wacom);
c58ac3a8
BT		 2246 return error;
2247}
2248
a2f091af
BT		 2249static void wacom_wireless_work(struct work_struct *work)
2250{
d17d1f17 2251 struct wacom *wacom = container_of(work, struct wacom, wireless_work);
a2f091af
BT		 2252 struct usb_device *usbdev = wacom->usbdev;
2253 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2254 struct hid_device *hdev1, *hdev2;
2255 struct wacom *wacom1, *wacom2;
2256 struct wacom_wac *wacom_wac1, *wacom_wac2;
2257 int error;
2258
2259 /*
2260 * Regardless if this is a disconnect or a new tablet,
2261 * remove any existing input and battery devices.
2262 */
2263
2264 wacom_destroy_battery(wacom);
2265
2266 /* Stylus interface */
2267 hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2268 wacom1 = hid_get_drvdata(hdev1);
2269 wacom_wac1 = &(wacom1->wacom_wac);
84dfbd7f 2270 wacom_release_resources(wacom1);
a2f091af
BT		 2271
2272 /* Touch interface */
2273 hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2274 wacom2 = hid_get_drvdata(hdev2);
2275 wacom_wac2 = &(wacom2->wacom_wac);
84dfbd7f 2276 wacom_release_resources(wacom2);
a2f091af
BT		 2277
2278 if (wacom_wac->pid == 0) {
2279 hid_info(wacom->hdev, "wireless tablet disconnected\n");
a2f091af
BT		 2280 } else {
2281 const struct hid_device_id *id = wacom_ids;
2282
2283 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2284 wacom_wac->pid);
2285
2286 while (id->bus) {
2287 if (id->vendor == USB_VENDOR_ID_WACOM &&
2288 id->product == wacom_wac->pid)
2289 break;
2290 id++;
2291 }
2292
2293 if (!id->bus) {
2294 hid_info(wacom->hdev, "ignoring unknown PID.\n");
2295 return;
2296 }
2297
2298 /* Stylus interface */
2299 wacom_wac1->features =
2300 *((struct wacom_features *)id->driver_data);
fd5f92b6 2301
a2f091af 2302 wacom_wac1->pid = wacom_wac->pid;
fd5f92b6
BT		 2303 hid_hw_stop(hdev1);
2304 error = wacom_parse_and_register(wacom1, true);
a2f091af
BT		 2305 if (error)
2306 goto fail;
2307
2308 /* Touch interface */
2309 if (wacom_wac1->features.touch_max ||
2310 (wacom_wac1->features.type >= INTUOSHT &&
2311 wacom_wac1->features.type <= BAMBOO_PT)) {
2312 wacom_wac2->features =
2313 *((struct wacom_features *)id->driver_data);
a2f091af 2314 wacom_wac2->pid = wacom_wac->pid;
fd5f92b6
BT		 2315 hid_hw_stop(hdev2);
2316 error = wacom_parse_and_register(wacom2, true);
a2f091af
BT		 2317 if (error)
2318 goto fail;
a2f091af
BT		 2319 }
2320
9956953e
BT		 2321 strlcpy(wacom_wac->name, wacom_wac1->name,
2322 sizeof(wacom_wac->name));
a2f091af
BT		 2323 error = wacom_initialize_battery(wacom);
2324 if (error)
2325 goto fail;
2326 }
2327
2328 return;
2329
2330fail:
84dfbd7f 2331 wacom_release_resources(wacom1);
84dfbd7f 2332 wacom_release_resources(wacom2);
a2f091af
BT		 2333 return;
2334}
2335
04bfa27b
BT		 2336static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2337{
2338 struct wacom_remote *remote = wacom->remote;
e7749f6e 2339 u32 serial = remote->remotes[index].serial;
04bfa27b 2340 int i;
7c35dc3c
BT		 2341 unsigned long flags;
2342
2343 spin_lock_irqsave(&remote->remote_lock, flags);
2344 remote->remotes[index].registered = false;
2345 spin_unlock_irqrestore(&remote->remote_lock, flags);
04bfa27b 2346
9f1015d4
BT		 2347 if (remote->remotes[index].battery.battery)
2348 devres_release_group(&wacom->hdev->dev,
2349 &remote->remotes[index].battery.bat_desc);
2350
e7749f6e
BT		 2351 if (remote->remotes[index].group.name)
2352 devres_release_group(&wacom->hdev->dev,
2353 &remote->remotes[index]);
04bfa27b
BT		 2354
2355 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
e7749f6e
BT		 2356 if (remote->remotes[i].serial == serial) {
2357 remote->remotes[i].serial = 0;
2358 remote->remotes[i].group.name = NULL;
7c35dc3c 2359 remote->remotes[i].registered = false;
9f1015d4 2360 remote->remotes[i].battery.battery = NULL;
04bfa27b
BT		 2361 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2362 }
2363 }
2364}
2365
2366static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2367 unsigned int index)
2368{
2369 struct wacom_remote *remote = wacom->remote;
f9036bd4 2370 struct device *dev = &wacom->hdev->dev;
04bfa27b
BT		 2371 int error, k;
2372
2373 /* A remote can pair more than once with an EKR,
2374 * check to make sure this serial isn't already paired.
2375 */
2376 for (k = 0; k < WACOM_MAX_REMOTES; k++) {
e7749f6e 2377 if (remote->remotes[k].serial == serial)
04bfa27b
BT		 2378 break;
2379 }
2380
2381 if (k < WACOM_MAX_REMOTES) {
e7749f6e 2382 remote->remotes[index].serial = serial;
04bfa27b
BT		 2383 return 0;
2384 }
2385
e7749f6e 2386 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
f9036bd4
BT		 2387 return -ENOMEM;
2388
04bfa27b
BT		 2389 error = wacom_remote_create_attr_group(wacom, serial, index);
2390 if (error)
f9036bd4 2391 goto fail;
04bfa27b 2392
7c35dc3c
BT		 2393 remote->remotes[index].input = wacom_allocate_input(wacom);
2394 if (!remote->remotes[index].input) {
2395 error = -ENOMEM;
2396 goto fail;
2397 }
2398 remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2399 remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2400
2401 if (!remote->remotes[index].input->name) {
2402 error = -EINVAL;
2403 goto fail;
2404 }
2405
2406 error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2407 &wacom->wacom_wac);
2408 if (error)
2409 goto fail;
2410
e7749f6e 2411 remote->remotes[index].serial = serial;
04bfa27b 2412
7c35dc3c
BT		 2413 error = input_register_device(remote->remotes[index].input);
2414 if (error)
2415 goto fail;
2416
97f5541f
BT		 2417 error = wacom_led_groups_alloc_and_register_one(
2418 &remote->remotes[index].input->dev,
2419 wacom, index, 3, true);
2420 if (error)
2421 goto fail;
2422
7c35dc3c
BT		 2423 remote->remotes[index].registered = true;
2424
e7749f6e 2425 devres_close_group(dev, &remote->remotes[index]);
04bfa27b 2426 return 0;
f9036bd4
BT		 2427
2428fail:
e7749f6e
BT		 2429 devres_release_group(dev, &remote->remotes[index]);
2430 remote->remotes[index].serial = 0;
f9036bd4 2431 return error;
04bfa27b
BT		 2432}
2433
9f1015d4
BT		 2434static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2435{
2436 struct wacom_remote *remote = wacom->remote;
2437 int error;
2438
2439 if (!remote->remotes[index].registered)
2440 return 0;
2441
2442 if (remote->remotes[index].battery.battery)
2443 return 0;
2444
2445 if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2446 return 0;
2447
2448 error = __wacom_initialize_battery(wacom,
2449 &wacom->remote->remotes[index].battery);
2450 if (error)
2451 return error;
2452
2453 return 0;
2454}
2455
e6f2813a
BT		 2456static void wacom_remote_work(struct work_struct *work)
2457{
2458 struct wacom *wacom = container_of(work, struct wacom, remote_work);
83e6b40e 2459 struct wacom_remote *remote = wacom->remote;
e6f2813a
BT		 2460 struct wacom_remote_data data;
2461 unsigned long flags;
2462 unsigned int count;
2463 u32 serial;
04bfa27b 2464 int i;
e6f2813a 2465
83e6b40e 2466 spin_lock_irqsave(&remote->remote_lock, flags);
e6f2813a 2467
83e6b40e 2468 count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
e6f2813a
BT		 2469
2470 if (count != sizeof(data)) {
2471 hid_err(wacom->hdev,
2472 "workitem triggered without status available\n");
83e6b40e 2473 spin_unlock_irqrestore(&remote->remote_lock, flags);
e6f2813a
BT		 2474 return;
2475 }
2476
83e6b40e 2477 if (!kfifo_is_empty(&remote->remote_fifo))
e6f2813a
BT		 2478 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2479
83e6b40e 2480 spin_unlock_irqrestore(&remote->remote_lock, flags);
e6f2813a
BT		 2481
2482 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2483 serial = data.remote[i].serial;
2484 if (data.remote[i].connected) {
2485
9f1015d4
BT		 2486 if (remote->remotes[i].serial == serial) {
2487 wacom_remote_attach_battery(wacom, i);
e6f2813a 2488 continue;
9f1015d4 2489 }
e6f2813a 2490
e7749f6e 2491 if (remote->remotes[i].serial)
04bfa27b 2492 wacom_remote_destroy_one(wacom, i);
e6f2813a 2493
04bfa27b 2494 wacom_remote_create_one(wacom, serial, i);
e6f2813a 2495
e7749f6e 2496 } else if (remote->remotes[i].serial) {
04bfa27b 2497 wacom_remote_destroy_one(wacom, i);
e6f2813a
BT		 2498 }
2499 }
2500}
2501
4082da80
BT		 2502static void wacom_mode_change_work(struct work_struct *work)
2503{
2504 struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
2505 struct wacom_shared *shared = wacom->wacom_wac.shared;
2506 struct wacom *wacom1 = NULL;
2507 struct wacom *wacom2 = NULL;
2508 bool is_direct = wacom->wacom_wac.is_direct_mode;
2509 int error = 0;
2510
2511 if (shared->pen) {
2512 wacom1 = hid_get_drvdata(shared->pen);
2513 wacom_release_resources(wacom1);
2514 hid_hw_stop(wacom1->hdev);
2515 wacom1->wacom_wac.has_mode_change = true;
2516 wacom1->wacom_wac.is_direct_mode = is_direct;
2517 }
2518
2519 if (shared->touch) {
2520 wacom2 = hid_get_drvdata(shared->touch);
2521 wacom_release_resources(wacom2);
2522 hid_hw_stop(wacom2->hdev);
2523 wacom2->wacom_wac.has_mode_change = true;
2524 wacom2->wacom_wac.is_direct_mode = is_direct;
2525 }
2526
2527 if (wacom1) {
2528 error = wacom_parse_and_register(wacom1, false);
2529 if (error)
2530 return;
2531 }
2532
2533 if (wacom2) {
2534 error = wacom_parse_and_register(wacom2, false);
2535 if (error)
2536 return;
2537 }
2538
a2f091af
BT		 2539 return;
2540}
2541
c58ac3a8
BT		 2542static int wacom_probe(struct hid_device *hdev,
2543 const struct hid_device_id *id)
2544{
2545 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2546 struct usb_device *dev = interface_to_usbdev(intf);
2547 struct wacom *wacom;
2548 struct wacom_wac *wacom_wac;
2549 struct wacom_features *features;
2550 int error;
2551
2552 if (!id->driver_data)
2553 return -EINVAL;
2554
2555 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2556
2557 /* hid-core sets this quirk for the boot interface */
2558 hdev->quirks &= ~HID_QUIRK_NOGET;
2559
19b64330 2560 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
c58ac3a8
BT		 2561 if (!wacom)
2562 return -ENOMEM;
2563
2564 hid_set_drvdata(hdev, wacom);
2565 wacom->hdev = hdev;
2566
2567 wacom_wac = &wacom->wacom_wac;
2568 wacom_wac->features = *((struct wacom_features *)id->driver_data);
2569 features = &wacom_wac->features;
2570
2571 if (features->check_for_hid_type && features->hid_type != hdev->type) {
2572 error = -ENODEV;
3888b0d5 2573 goto fail;
c58ac3a8
BT		 2574 }
2575
c6fa1aeb 2576 wacom_wac->hid_data.inputmode = -1;
326ea2a9 2577 wacom_wac->mode_report = -1;
c6fa1aeb 2578
c58ac3a8
BT		 2579 wacom->usbdev = dev;
2580 wacom->intf = intf;
2581 mutex_init(&wacom->lock);
a544c619 2582 INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
d17d1f17
BT		 2583 INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2584 INIT_WORK(&wacom->battery_work, wacom_battery_work);
e6f2813a 2585 INIT_WORK(&wacom->remote_work, wacom_remote_work);
4082da80 2586 INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
c58ac3a8
BT		 2587
2588 /* ask for the report descriptor to be loaded by HID */
2589 error = hid_parse(hdev);
2590 if (error) {
2591 hid_err(hdev, "parse failed\n");
3888b0d5 2592 goto fail;
c58ac3a8
BT		 2593 }
2594
fd5f92b6 2595 error = wacom_parse_and_register(wacom, false);
c58ac3a8 2596 if (error)
3888b0d5 2597 goto fail;
c58ac3a8
BT		 2598
2599 if (hdev->bus == BUS_BLUETOOTH) {
2600 error = device_create_file(&hdev->dev, &dev_attr_speed);
2601 if (error)
2602 hid_warn(hdev,
2603 "can't create sysfs speed attribute err: %d\n",
2604 error);
2605 }
2606
2607 return 0;
2608
3888b0d5 2609fail:
29b47391 2610 hid_set_drvdata(hdev, NULL);
5014186d 2611 return error;
3bea733a
PC		 2612}
2613
29b47391 2614static void wacom_remove(struct hid_device *hdev)
3bea733a 2615{
29b47391 2616 struct wacom *wacom = hid_get_drvdata(hdev);
f6205161
BT		 2617 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2618 struct wacom_features *features = &wacom_wac->features;
2619
2620 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2621 hid_hw_close(hdev);
3bea733a 2622
29b47391 2623 hid_hw_stop(hdev);
e7224094 2624
a544c619 2625 cancel_delayed_work_sync(&wacom->init_work);
d17d1f17
BT		 2626 cancel_work_sync(&wacom->wireless_work);
2627 cancel_work_sync(&wacom->battery_work);
e6f2813a 2628 cancel_work_sync(&wacom->remote_work);
4082da80 2629 cancel_work_sync(&wacom->mode_change_work);
f81a1295
BT		 2630 if (hdev->bus == BUS_BLUETOOTH)
2631 device_remove_file(&hdev->dev, &dev_attr_speed);
e7224094 2632
c0265a94
BT		 2633 /* make sure we don't trigger the LEDs */
2634 wacom_led_groups_release(wacom);
b6b1f19b
AAS		 2635
2636 if (wacom->wacom_wac.features.type != REMOTE)
2637 wacom_release_resources(wacom);
5b779fc5 2638
29b47391 2639 hid_set_drvdata(hdev, NULL);
e7224094
ON		 2640}
2641
41a74581 2642#ifdef CONFIG_PM
29b47391 2643static int wacom_resume(struct hid_device *hdev)
e7224094 2644{
29b47391 2645 struct wacom *wacom = hid_get_drvdata(hdev);
e7224094
ON		 2646
2647 mutex_lock(&wacom->lock);
38101475
PC		 2648
2649 /* switch to wacom mode first */
a544c619 2650 _wacom_query_tablet_data(wacom);
5d7e7d47 2651 wacom_led_control(wacom);
38101475 2652
e7224094
ON		 2653 mutex_unlock(&wacom->lock);
2654
29b47391 2655 return 0;
e7224094
ON		 2656}
2657
29b47391 2658static int wacom_reset_resume(struct hid_device *hdev)
e7224094 2659{
29b47391 2660 return wacom_resume(hdev);
3bea733a 2661}
41a74581 2662#endif /* CONFIG_PM */
3bea733a 2663
29b47391 2664static struct hid_driver wacom_driver = {
3bea733a 2665 .name = "wacom",
b036f6fb 2666 .id_table = wacom_ids,
3bea733a 2667 .probe = wacom_probe,
29b47391 2668 .remove = wacom_remove,
7704ac93 2669 .report = wacom_wac_report,
29b47391 2670#ifdef CONFIG_PM
e7224094
ON		 2671 .resume = wacom_resume,
2672 .reset_resume = wacom_reset_resume,
29b47391
BT		 2673#endif
2674 .raw_event = wacom_raw_event,
3bea733a 2675};
29b47391 2676module_hid_driver(wacom_driver);
f2e0a7d4
BT		 2677
2678MODULE_VERSION(DRIVER_VERSION);
2679MODULE_AUTHOR(DRIVER_AUTHOR);
2680MODULE_DESCRIPTION(DRIVER_DESC);
7021b600 2681MODULE_LICENSE("GPL");
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