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x86/unwinder: Handle stack overflows more gracefully
[linux/fpc-iii.git] / drivers / hid / wacom_sys.c
blob906e654fb0ba42fe85b49e3813beebabe86d7b3e
1 /*
2 * drivers/input/tablet/wacom_sys.c
3 *
4 * USB Wacom tablet support - system specific code
5 */
6
7 /*
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include "wacom_wac.h"
15 #include "wacom.h"
16 #include <linux/input/mt.h>
17
18 #define WAC_MSG_RETRIES 5
19 #define WAC_CMD_RETRIES 10
20
21 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
22 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
23 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
24
25 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
26 size_t size, unsigned int retries)
27 {
28 int retval;
29
30 do {
31 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
32 HID_REQ_GET_REPORT);
33 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
34
35 if (retval < 0)
36 hid_err(hdev, "wacom_get_report: ran out of retries "
37 "(last error = %d)\n", retval);
38
39 return retval;
40 }
41
42 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
43 size_t size, unsigned int retries)
44 {
45 int retval;
46
47 do {
48 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
49 HID_REQ_SET_REPORT);
50 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
51
52 if (retval < 0)
53 hid_err(hdev, "wacom_set_report: ran out of retries "
54 "(last error = %d)\n", retval);
55
56 return retval;
57 }
58
59 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
60 u8 *raw_data, int size)
61 {
62 struct wacom *wacom = hid_get_drvdata(hdev);
63
64 if (size > WACOM_PKGLEN_MAX)
65 return 1;
66
67 memcpy(wacom->wacom_wac.data, raw_data, size);
68
69 wacom_wac_irq(&wacom->wacom_wac, size);
70
71 return 0;
72 }
73
74 static int wacom_open(struct input_dev *dev)
75 {
76 struct wacom *wacom = input_get_drvdata(dev);
77
78 return hid_hw_open(wacom->hdev);
79 }
80
81 static void wacom_close(struct input_dev *dev)
82 {
83 struct wacom *wacom = input_get_drvdata(dev);
84
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);
91 }
92
93 /*
94 * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
95 */
96 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
97 unsigned unit, int exponent)
98 {
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);
107 }
108
109 static void wacom_feature_mapping(struct hid_device *hdev,
110 struct hid_field *field, struct hid_usage *usage)
111 {
112 struct wacom *wacom = hid_get_drvdata(hdev);
113 struct wacom_features *features = &wacom->wacom_wac.features;
114 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
115 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
116 u8 *data;
117 int ret;
118 int n;
119
120 switch (equivalent_usage) {
121 case HID_DG_CONTACTMAX:
122 /* leave touch_max as is if predefined */
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,
130 data, 2, WAC_CMD_RETRIES);
131 if (ret == 2) {
132 features->touch_max = data[1];
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 }
140 kfree(data);
141 }
142 break;
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;
153
154 case HID_UP_DIGITIZER:
155 if (field->report->id == 0x0B &&
156 (field->application == WACOM_HID_G9_PEN ||
157 field->application == WACOM_HID_G11_PEN)) {
158 wacom->wacom_wac.mode_report = field->report->id;
159 wacom->wacom_wac.mode_value = 0;
160 }
161 break;
162
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
168 case WACOM_HID_UP_G9:
169 case WACOM_HID_UP_G11:
170 if (field->report->id == 0x03 &&
171 (field->application == WACOM_HID_G9_TOUCHSCREEN ||
172 field->application == WACOM_HID_G11_TOUCHSCREEN)) {
173 wacom->wacom_wac.mode_report = field->report->id;
174 wacom->wacom_wac.mode_value = 0;
175 }
176 break;
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;
198 }
199 }
200
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.
229 *
230 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
231 * data. We deal with them after returning from this function.
232 */
233 static void wacom_usage_mapping(struct hid_device *hdev,
234 struct hid_field *field, struct hid_usage *usage)
235 {
236 struct wacom *wacom = hid_get_drvdata(hdev);
237 struct wacom_features *features = &wacom->wacom_wac.features;
238 bool finger = WACOM_FINGER_FIELD(field);
239 bool pen = WACOM_PEN_FIELD(field);
240
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 */
246 if (pen)
247 features->device_type |= WACOM_DEVICETYPE_PEN;
248 else if (finger)
249 features->device_type |= WACOM_DEVICETYPE_TOUCH;
250 else
251 return;
252
253 /*
254 * Bamboo models do not support HID_DG_CONTACTMAX.
255 * And, Bamboo Pen only descriptor contains touch.
256 */
257 if (features->type > BAMBOO_PT) {
258 /* ISDv4 touch devices at least supports one touch point */
259 if (finger && !features->touch_max)
260 features->touch_max = 1;
261 }
262
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
287 switch (usage->hid) {
288 case HID_GD_X:
289 features->x_max = field->logical_maximum;
290 if (finger) {
291 features->x_phy = field->physical_maximum;
292 if ((features->type != BAMBOO_PT) &&
293 (features->type != BAMBOO_TOUCH)) {
294 features->unit = field->unit;
295 features->unitExpo = field->unit_exponent;
296 }
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;
303 if ((features->type != BAMBOO_PT) &&
304 (features->type != BAMBOO_TOUCH)) {
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 }
315
316 if (features->type == HID_GENERIC)
317 wacom_wac_usage_mapping(hdev, field, usage);
318 }
319
320 static 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 */
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
335 if (features->touch_max > 1) {
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);
344 }
345 }
346 }
347
348 static 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);
366 }
367 }
368 }
369
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 }
382
383 wacom_post_parse_hid(hdev, features);
384 }
385
386 static 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
405 static int wacom_set_device_mode(struct hid_device *hdev,
406 struct wacom_wac *wacom_wac)
407 {
408 u8 *rep_data;
409 struct hid_report *r;
410 struct hid_report_enum *re;
411 int length;
412 int error = -ENOMEM, limit = 0;
413
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);
423 if (!rep_data)
424 return -ENOMEM;
425
426 length = hid_report_len(r);
427
428 do {
429 rep_data[0] = wacom_wac->mode_report;
430 rep_data[1] = wacom_wac->mode_value;
431
432 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
433 length, 1);
434 if (error >= 0)
435 error = wacom_get_report(hdev, HID_FEATURE_REPORT,
436 rep_data, length, 1);
437 } while (error >= 0 &&
438 rep_data[1] != wacom_wac->mode_report &&
439 limit++ < WAC_MSG_RETRIES);
440
441 kfree(rep_data);
442
443 return error < 0 ? error : 0;
444 }
445
446 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
447 struct wacom_features *features)
448 {
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;
457 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
458 3);
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,
465 rep_data, 2, 3);
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;
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
489 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
490 1);
491 if (ret >= 0)
492 wacom->wacom_wac.bt_high_speed = speed;
493 break;
494 }
495
496 return 0;
497 }
498
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 */
506 static int _wacom_query_tablet_data(struct wacom *wacom)
507 {
508 struct hid_device *hdev = wacom->hdev;
509 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
510 struct wacom_features *features = &wacom_wac->features;
511
512 if (hdev->bus == BUS_BLUETOOTH)
513 return wacom_bt_query_tablet_data(hdev, 1, features);
514
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 }
536 }
537 }
538
539 wacom_set_device_mode(hdev, wacom_wac);
540
541 if (features->type == HID_GENERIC)
542 return wacom_hid_set_device_mode(hdev);
543
544 return 0;
545 }
546
547 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
548 struct wacom_features *features)
549 {
550 struct wacom *wacom = hid_get_drvdata(hdev);
551 struct usb_interface *intf = wacom->intf;
552
553 /* default features */
554 features->x_fuzz = 4;
555 features->y_fuzz = 4;
556 features->pressure_fuzz = 0;
557 features->distance_fuzz = 1;
558 features->tilt_fuzz = 1;
559
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) {
567 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
568 features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
569 else
570 features->device_type = WACOM_DEVICETYPE_NONE;
571 return;
572 }
573
574 wacom_parse_hid(hdev, features);
575 }
576
577 struct wacom_hdev_data {
578 struct list_head list;
579 struct kref kref;
580 struct hid_device *dev;
581 struct wacom_shared shared;
582 };
583
584 static LIST_HEAD(wacom_udev_list);
585 static DEFINE_MUTEX(wacom_udev_list_lock);
586
587 static 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
599 static bool wacom_are_sibling(struct hid_device *hdev,
600 struct hid_device *sibling)
601 {
602 struct wacom *wacom = hid_get_drvdata(hdev);
603 struct wacom_features *features = &wacom->wacom_wac.features;
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;
608
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;
626 }
627
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))
638 return false;
639
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))
646 return false;
647
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;
663 }
664
665 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
666 {
667 struct wacom_hdev_data *data;
668
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 kref_get(&data->kref);
673 return data;
674 }
675 }
676
677 /* Fallback to finding devices that appear to be "siblings" */
678 list_for_each_entry(data, &wacom_udev_list, list) {
679 if (wacom_are_sibling(hdev, data->dev)) {
680 kref_get(&data->kref);
681 return data;
682 }
683 }
684
685 return NULL;
686 }
687
688 static void wacom_release_shared_data(struct kref *kref)
689 {
690 struct wacom_hdev_data *data =
691 container_of(kref, struct wacom_hdev_data, kref);
692
693 mutex_lock(&wacom_udev_list_lock);
694 list_del(&data->list);
695 mutex_unlock(&wacom_udev_list_lock);
696
697 kfree(data);
698 }
699
700 static void wacom_remove_shared_data(void *res)
701 {
702 struct wacom *wacom = res;
703 struct wacom_hdev_data *data;
704 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
705
706 if (wacom_wac->shared) {
707 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
708 shared);
709
710 if (wacom_wac->shared->touch == wacom->hdev)
711 wacom_wac->shared->touch = NULL;
712 else if (wacom_wac->shared->pen == wacom->hdev)
713 wacom_wac->shared->pen = NULL;
714
715 kref_put(&data->kref, wacom_release_shared_data);
716 wacom_wac->shared = NULL;
717 }
718 }
719
720 static int wacom_add_shared_data(struct hid_device *hdev)
721 {
722 struct wacom *wacom = hid_get_drvdata(hdev);
723 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
724 struct wacom_hdev_data *data;
725 int retval = 0;
726
727 mutex_lock(&wacom_udev_list_lock);
728
729 data = wacom_get_hdev_data(hdev);
730 if (!data) {
731 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
732 if (!data) {
733 retval = -ENOMEM;
734 goto out;
735 }
736
737 kref_init(&data->kref);
738 data->dev = hdev;
739 list_add_tail(&data->list, &wacom_udev_list);
740 }
741
742 wacom_wac->shared = &data->shared;
743
744 retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
745 if (retval) {
746 mutex_unlock(&wacom_udev_list_lock);
747 wacom_remove_shared_data(wacom);
748 return retval;
749 }
750
751 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
752 wacom_wac->shared->touch = hdev;
753 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
754 wacom_wac->shared->pen = hdev;
755
756 out:
757 mutex_unlock(&wacom_udev_list_lock);
758 return retval;
759 }
760
761 static int wacom_led_control(struct wacom *wacom)
762 {
763 unsigned char *buf;
764 int retval;
765 unsigned char report_id = WAC_CMD_LED_CONTROL;
766 int buf_size = 9;
767
768 if (!wacom->led.groups)
769 return -ENOTSUPP;
770
771 if (wacom->wacom_wac.features.type == REMOTE)
772 return -ENOTSUPP;
773
774 if (wacom->wacom_wac.pid) { /* wireless connected */
775 report_id = WAC_CMD_WL_LED_CONTROL;
776 buf_size = 13;
777 }
778 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
779 report_id = WAC_CMD_WL_INTUOSP2;
780 buf_size = 51;
781 }
782 buf = kzalloc(buf_size, GFP_KERNEL);
783 if (!buf)
784 return -ENOMEM;
785
786 if (wacom->wacom_wac.features.type == HID_GENERIC) {
787 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
788 buf[1] = wacom->led.llv;
789 buf[2] = wacom->led.groups[0].select & 0x03;
790
791 } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
792 wacom->wacom_wac.features.type <= INTUOSPL)) {
793 /*
794 * Touch Ring and crop mark LED luminance may take on
795 * one of four values:
796 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
797 */
798 int ring_led = wacom->led.groups[0].select & 0x03;
799 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
800 int crop_lum = 0;
801 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
802
803 buf[0] = report_id;
804 if (wacom->wacom_wac.pid) {
805 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
806 buf, buf_size, WAC_CMD_RETRIES);
807 buf[0] = report_id;
808 buf[4] = led_bits;
809 } else
810 buf[1] = led_bits;
811 }
812 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
813 buf[0] = report_id;
814 buf[4] = 100; // Power Connection LED (ORANGE)
815 buf[5] = 100; // BT Connection LED (BLUE)
816 buf[6] = 100; // Paper Mode (RED?)
817 buf[7] = 100; // Paper Mode (GREEN?)
818 buf[8] = 100; // Paper Mode (BLUE?)
819 buf[9] = wacom->led.llv;
820 buf[10] = wacom->led.groups[0].select & 0x03;
821 }
822 else {
823 int led = wacom->led.groups[0].select | 0x4;
824
825 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
826 wacom->wacom_wac.features.type == WACOM_24HD)
827 led |= (wacom->led.groups[1].select << 4) | 0x40;
828
829 buf[0] = report_id;
830 buf[1] = led;
831 buf[2] = wacom->led.llv;
832 buf[3] = wacom->led.hlv;
833 buf[4] = wacom->led.img_lum;
834 }
835
836 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
837 WAC_CMD_RETRIES);
838 kfree(buf);
839
840 return retval;
841 }
842
843 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
844 const unsigned len, const void *img)
845 {
846 unsigned char *buf;
847 int i, retval;
848 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
849
850 buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
851 if (!buf)
852 return -ENOMEM;
853
854 /* Send 'start' command */
855 buf[0] = WAC_CMD_ICON_START;
856 buf[1] = 1;
857 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
858 WAC_CMD_RETRIES);
859 if (retval < 0)
860 goto out;
861
862 buf[0] = xfer_id;
863 buf[1] = button_id & 0x07;
864 for (i = 0; i < 4; i++) {
865 buf[2] = i;
866 memcpy(buf + 3, img + i * chunk_len, chunk_len);
867
868 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
869 buf, chunk_len + 3, WAC_CMD_RETRIES);
870 if (retval < 0)
871 break;
872 }
873
874 /* Send 'stop' */
875 buf[0] = WAC_CMD_ICON_START;
876 buf[1] = 0;
877 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
878 WAC_CMD_RETRIES);
879
880 out:
881 kfree(buf);
882 return retval;
883 }
884
885 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
886 const char *buf, size_t count)
887 {
888 struct hid_device *hdev = to_hid_device(dev);
889 struct wacom *wacom = hid_get_drvdata(hdev);
890 unsigned int id;
891 int err;
892
893 err = kstrtouint(buf, 10, &id);
894 if (err)
895 return err;
896
897 mutex_lock(&wacom->lock);
898
899 wacom->led.groups[set_id].select = id & 0x3;
900 err = wacom_led_control(wacom);
901
902 mutex_unlock(&wacom->lock);
903
904 return err < 0 ? err : count;
905 }
906
907 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
908 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
909 struct device_attribute *attr, const char *buf, size_t count) \
910 { \
911 return wacom_led_select_store(dev, SET_ID, buf, count); \
912 } \
913 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
914 struct device_attribute *attr, char *buf) \
915 { \
916 struct hid_device *hdev = to_hid_device(dev);\
917 struct wacom *wacom = hid_get_drvdata(hdev); \
918 return scnprintf(buf, PAGE_SIZE, "%d\n", \
919 wacom->led.groups[SET_ID].select); \
920 } \
921 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \
922 wacom_led##SET_ID##_select_show, \
923 wacom_led##SET_ID##_select_store)
924
925 DEVICE_LED_SELECT_ATTR(0);
926 DEVICE_LED_SELECT_ATTR(1);
927
928 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
929 const char *buf, size_t count)
930 {
931 unsigned int value;
932 int err;
933
934 err = kstrtouint(buf, 10, &value);
935 if (err)
936 return err;
937
938 mutex_lock(&wacom->lock);
939
940 *dest = value & 0x7f;
941 err = wacom_led_control(wacom);
942
943 mutex_unlock(&wacom->lock);
944
945 return err < 0 ? err : count;
946 }
947
948 #define DEVICE_LUMINANCE_ATTR(name, field) \
949 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
950 struct device_attribute *attr, const char *buf, size_t count) \
951 { \
952 struct hid_device *hdev = to_hid_device(dev);\
953 struct wacom *wacom = hid_get_drvdata(hdev); \
954 \
955 return wacom_luminance_store(wacom, &wacom->led.field, \
956 buf, count); \
957 } \
958 static ssize_t wacom_##name##_luminance_show(struct device *dev, \
959 struct device_attribute *attr, char *buf) \
960 { \
961 struct wacom *wacom = dev_get_drvdata(dev); \
962 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \
963 } \
964 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \
965 wacom_##name##_luminance_show, \
966 wacom_##name##_luminance_store)
967
968 DEVICE_LUMINANCE_ATTR(status0, llv);
969 DEVICE_LUMINANCE_ATTR(status1, hlv);
970 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
971
972 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
973 const char *buf, size_t count)
974 {
975 struct hid_device *hdev = to_hid_device(dev);
976 struct wacom *wacom = hid_get_drvdata(hdev);
977 int err;
978 unsigned len;
979 u8 xfer_id;
980
981 if (hdev->bus == BUS_BLUETOOTH) {
982 len = 256;
983 xfer_id = WAC_CMD_ICON_BT_XFER;
984 } else {
985 len = 1024;
986 xfer_id = WAC_CMD_ICON_XFER;
987 }
988
989 if (count != len)
990 return -EINVAL;
991
992 mutex_lock(&wacom->lock);
993
994 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
995
996 mutex_unlock(&wacom->lock);
997
998 return err < 0 ? err : count;
999 }
1000
1001 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
1002 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
1003 struct device_attribute *attr, const char *buf, size_t count) \
1004 { \
1005 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
1006 } \
1007 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \
1008 NULL, wacom_btnimg##BUTTON_ID##_store)
1009
1010 DEVICE_BTNIMG_ATTR(0);
1011 DEVICE_BTNIMG_ATTR(1);
1012 DEVICE_BTNIMG_ATTR(2);
1013 DEVICE_BTNIMG_ATTR(3);
1014 DEVICE_BTNIMG_ATTR(4);
1015 DEVICE_BTNIMG_ATTR(5);
1016 DEVICE_BTNIMG_ATTR(6);
1017 DEVICE_BTNIMG_ATTR(7);
1018
1019 static struct attribute *cintiq_led_attrs[] = {
1020 &dev_attr_status_led0_select.attr,
1021 &dev_attr_status_led1_select.attr,
1022 NULL
1023 };
1024
1025 static struct attribute_group cintiq_led_attr_group = {
1026 .name = "wacom_led",
1027 .attrs = cintiq_led_attrs,
1028 };
1029
1030 static struct attribute *intuos4_led_attrs[] = {
1031 &dev_attr_status0_luminance.attr,
1032 &dev_attr_status1_luminance.attr,
1033 &dev_attr_status_led0_select.attr,
1034 &dev_attr_buttons_luminance.attr,
1035 &dev_attr_button0_rawimg.attr,
1036 &dev_attr_button1_rawimg.attr,
1037 &dev_attr_button2_rawimg.attr,
1038 &dev_attr_button3_rawimg.attr,
1039 &dev_attr_button4_rawimg.attr,
1040 &dev_attr_button5_rawimg.attr,
1041 &dev_attr_button6_rawimg.attr,
1042 &dev_attr_button7_rawimg.attr,
1043 NULL
1044 };
1045
1046 static struct attribute_group intuos4_led_attr_group = {
1047 .name = "wacom_led",
1048 .attrs = intuos4_led_attrs,
1049 };
1050
1051 static struct attribute *intuos5_led_attrs[] = {
1052 &dev_attr_status0_luminance.attr,
1053 &dev_attr_status_led0_select.attr,
1054 NULL
1055 };
1056
1057 static struct attribute_group intuos5_led_attr_group = {
1058 .name = "wacom_led",
1059 .attrs = intuos5_led_attrs,
1060 };
1061
1062 static struct attribute *generic_led_attrs[] = {
1063 &dev_attr_status0_luminance.attr,
1064 &dev_attr_status_led0_select.attr,
1065 NULL
1066 };
1067
1068 static struct attribute_group generic_led_attr_group = {
1069 .name = "wacom_led",
1070 .attrs = generic_led_attrs,
1071 };
1072
1073 struct wacom_sysfs_group_devres {
1074 struct attribute_group *group;
1075 struct kobject *root;
1076 };
1077
1078 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1079 {
1080 struct wacom_sysfs_group_devres *devres = res;
1081 struct kobject *kobj = devres->root;
1082
1083 dev_dbg(dev, "%s: dropping reference to %s\n",
1084 __func__, devres->group->name);
1085 sysfs_remove_group(kobj, devres->group);
1086 }
1087
1088 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1089 struct kobject *root,
1090 struct attribute_group *group)
1091 {
1092 struct wacom_sysfs_group_devres *devres;
1093 int error;
1094
1095 devres = devres_alloc(wacom_devm_sysfs_group_release,
1096 sizeof(struct wacom_sysfs_group_devres),
1097 GFP_KERNEL);
1098 if (!devres)
1099 return -ENOMEM;
1100
1101 devres->group = group;
1102 devres->root = root;
1103
1104 error = sysfs_create_group(devres->root, group);
1105 if (error)
1106 return error;
1107
1108 devres_add(&wacom->hdev->dev, devres);
1109
1110 return 0;
1111 }
1112
1113 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1114 struct attribute_group *group)
1115 {
1116 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1117 group);
1118 }
1119
1120 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1121 {
1122 struct wacom *wacom = led->wacom;
1123
1124 if (wacom->led.max_hlv)
1125 return led->hlv * LED_FULL / wacom->led.max_hlv;
1126
1127 if (wacom->led.max_llv)
1128 return led->llv * LED_FULL / wacom->led.max_llv;
1129
1130 /* device doesn't support brightness tuning */
1131 return LED_FULL;
1132 }
1133
1134 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1135 {
1136 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1137 struct wacom *wacom = led->wacom;
1138
1139 if (wacom->led.groups[led->group].select != led->id)
1140 return LED_OFF;
1141
1142 return wacom_leds_brightness_get(led);
1143 }
1144
1145 static int wacom_led_brightness_set(struct led_classdev *cdev,
1146 enum led_brightness brightness)
1147 {
1148 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1149 struct wacom *wacom = led->wacom;
1150 int error;
1151
1152 mutex_lock(&wacom->lock);
1153
1154 if (!wacom->led.groups || (brightness == LED_OFF &&
1155 wacom->led.groups[led->group].select != led->id)) {
1156 error = 0;
1157 goto out;
1158 }
1159
1160 led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1161 led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1162
1163 wacom->led.groups[led->group].select = led->id;
1164
1165 error = wacom_led_control(wacom);
1166
1167 out:
1168 mutex_unlock(&wacom->lock);
1169
1170 return error;
1171 }
1172
1173 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1174 enum led_brightness brightness)
1175 {
1176 }
1177
1178 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1179 struct wacom_led *led, unsigned int group,
1180 unsigned int id, bool read_only)
1181 {
1182 int error;
1183 char *name;
1184
1185 name = devm_kasprintf(dev, GFP_KERNEL,
1186 "%s::wacom-%d.%d",
1187 dev_name(dev),
1188 group,
1189 id);
1190 if (!name)
1191 return -ENOMEM;
1192
1193 if (!read_only) {
1194 led->trigger.name = name;
1195 error = devm_led_trigger_register(dev, &led->trigger);
1196 if (error) {
1197 hid_err(wacom->hdev,
1198 "failed to register LED trigger %s: %d\n",
1199 led->cdev.name, error);
1200 return error;
1201 }
1202 }
1203
1204 led->group = group;
1205 led->id = id;
1206 led->wacom = wacom;
1207 led->llv = wacom->led.llv;
1208 led->hlv = wacom->led.hlv;
1209 led->cdev.name = name;
1210 led->cdev.max_brightness = LED_FULL;
1211 led->cdev.flags = LED_HW_PLUGGABLE;
1212 led->cdev.brightness_get = __wacom_led_brightness_get;
1213 if (!read_only) {
1214 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1215 led->cdev.default_trigger = led->cdev.name;
1216 } else {
1217 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1218 }
1219
1220 error = devm_led_classdev_register(dev, &led->cdev);
1221 if (error) {
1222 hid_err(wacom->hdev,
1223 "failed to register LED %s: %d\n",
1224 led->cdev.name, error);
1225 led->cdev.name = NULL;
1226 return error;
1227 }
1228
1229 return 0;
1230 }
1231
1232 static void wacom_led_groups_release_one(void *data)
1233 {
1234 struct wacom_group_leds *group = data;
1235
1236 devres_release_group(group->dev, group);
1237 }
1238
1239 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1240 struct wacom *wacom,
1241 int group_id, int count,
1242 bool read_only)
1243 {
1244 struct wacom_led *leds;
1245 int i, error;
1246
1247 if (group_id >= wacom->led.count || count <= 0)
1248 return -EINVAL;
1249
1250 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1251 return -ENOMEM;
1252
1253 leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL);
1254 if (!leds) {
1255 error = -ENOMEM;
1256 goto err;
1257 }
1258
1259 wacom->led.groups[group_id].leds = leds;
1260 wacom->led.groups[group_id].count = count;
1261
1262 for (i = 0; i < count; i++) {
1263 error = wacom_led_register_one(dev, wacom, &leds[i],
1264 group_id, i, read_only);
1265 if (error)
1266 goto err;
1267 }
1268
1269 wacom->led.groups[group_id].dev = dev;
1270
1271 devres_close_group(dev, &wacom->led.groups[group_id]);
1272
1273 /*
1274 * There is a bug (?) in devm_led_classdev_register() in which its
1275 * increments the refcount of the parent. If the parent is an input
1276 * device, that means the ref count never reaches 0 when
1277 * devm_input_device_release() gets called.
1278 * This means that the LEDs are still there after disconnect.
1279 * Manually force the release of the group so that the leds are released
1280 * once we are done using them.
1281 */
1282 error = devm_add_action_or_reset(&wacom->hdev->dev,
1283 wacom_led_groups_release_one,
1284 &wacom->led.groups[group_id]);
1285 if (error)
1286 return error;
1287
1288 return 0;
1289
1290 err:
1291 devres_release_group(dev, &wacom->led.groups[group_id]);
1292 return error;
1293 }
1294
1295 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1296 unsigned int id)
1297 {
1298 struct wacom_group_leds *group;
1299
1300 if (group_id >= wacom->led.count)
1301 return NULL;
1302
1303 group = &wacom->led.groups[group_id];
1304
1305 if (!group->leds)
1306 return NULL;
1307
1308 id %= group->count;
1309
1310 return &group->leds[id];
1311 }
1312
1313 /**
1314 * wacom_led_next: gives the next available led with a wacom trigger.
1315 *
1316 * returns the next available struct wacom_led which has its default trigger
1317 * or the current one if none is available.
1318 */
1319 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1320 {
1321 struct wacom_led *next_led;
1322 int group, next;
1323
1324 if (!wacom || !cur)
1325 return NULL;
1326
1327 group = cur->group;
1328 next = cur->id;
1329
1330 do {
1331 next_led = wacom_led_find(wacom, group, ++next);
1332 if (!next_led || next_led == cur)
1333 return next_led;
1334 } while (next_led->cdev.trigger != &next_led->trigger);
1335
1336 return next_led;
1337 }
1338
1339 static void wacom_led_groups_release(void *data)
1340 {
1341 struct wacom *wacom = data;
1342
1343 wacom->led.groups = NULL;
1344 wacom->led.count = 0;
1345 }
1346
1347 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1348 {
1349 struct device *dev = &wacom->hdev->dev;
1350 struct wacom_group_leds *groups;
1351 int error;
1352
1353 groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
1354 GFP_KERNEL);
1355 if (!groups)
1356 return -ENOMEM;
1357
1358 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1359 if (error)
1360 return error;
1361
1362 wacom->led.groups = groups;
1363 wacom->led.count = count;
1364
1365 return 0;
1366 }
1367
1368 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1369 int led_per_group, bool read_only)
1370 {
1371 struct device *dev;
1372 int i, error;
1373
1374 if (!wacom->wacom_wac.pad_input)
1375 return -EINVAL;
1376
1377 dev = &wacom->wacom_wac.pad_input->dev;
1378
1379 error = wacom_led_groups_allocate(wacom, group_count);
1380 if (error)
1381 return error;
1382
1383 for (i = 0; i < group_count; i++) {
1384 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1385 led_per_group,
1386 read_only);
1387 if (error)
1388 return error;
1389 }
1390
1391 return 0;
1392 }
1393
1394 int wacom_initialize_leds(struct wacom *wacom)
1395 {
1396 int error;
1397
1398 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1399 return 0;
1400
1401 /* Initialize default values */
1402 switch (wacom->wacom_wac.features.type) {
1403 case HID_GENERIC:
1404 if (!wacom->generic_has_leds)
1405 return 0;
1406 wacom->led.llv = 100;
1407 wacom->led.max_llv = 100;
1408
1409 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1410 if (error) {
1411 hid_err(wacom->hdev,
1412 "cannot create leds err: %d\n", error);
1413 return error;
1414 }
1415
1416 error = wacom_devm_sysfs_create_group(wacom,
1417 &generic_led_attr_group);
1418 break;
1419
1420 case INTUOS4S:
1421 case INTUOS4:
1422 case INTUOS4WL:
1423 case INTUOS4L:
1424 wacom->led.llv = 10;
1425 wacom->led.hlv = 20;
1426 wacom->led.max_llv = 127;
1427 wacom->led.max_hlv = 127;
1428 wacom->led.img_lum = 10;
1429
1430 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1431 if (error) {
1432 hid_err(wacom->hdev,
1433 "cannot create leds err: %d\n", error);
1434 return error;
1435 }
1436
1437 error = wacom_devm_sysfs_create_group(wacom,
1438 &intuos4_led_attr_group);
1439 break;
1440
1441 case WACOM_24HD:
1442 case WACOM_21UX2:
1443 wacom->led.llv = 0;
1444 wacom->led.hlv = 0;
1445 wacom->led.img_lum = 0;
1446
1447 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1448 if (error) {
1449 hid_err(wacom->hdev,
1450 "cannot create leds err: %d\n", error);
1451 return error;
1452 }
1453
1454 error = wacom_devm_sysfs_create_group(wacom,
1455 &cintiq_led_attr_group);
1456 break;
1457
1458 case INTUOS5S:
1459 case INTUOS5:
1460 case INTUOS5L:
1461 case INTUOSPS:
1462 case INTUOSPM:
1463 case INTUOSPL:
1464 wacom->led.llv = 32;
1465 wacom->led.max_llv = 96;
1466
1467 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1468 if (error) {
1469 hid_err(wacom->hdev,
1470 "cannot create leds err: %d\n", error);
1471 return error;
1472 }
1473
1474 error = wacom_devm_sysfs_create_group(wacom,
1475 &intuos5_led_attr_group);
1476 break;
1477
1478 case INTUOSP2_BT:
1479 wacom->led.llv = 50;
1480 wacom->led.max_llv = 100;
1481 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1482 if (error) {
1483 hid_err(wacom->hdev,
1484 "cannot create leds err: %d\n", error);
1485 return error;
1486 }
1487 return 0;
1488
1489 case REMOTE:
1490 wacom->led.llv = 255;
1491 wacom->led.max_llv = 255;
1492 error = wacom_led_groups_allocate(wacom, 5);
1493 if (error) {
1494 hid_err(wacom->hdev,
1495 "cannot create leds err: %d\n", error);
1496 return error;
1497 }
1498 return 0;
1499
1500 default:
1501 return 0;
1502 }
1503
1504 if (error) {
1505 hid_err(wacom->hdev,
1506 "cannot create sysfs group err: %d\n", error);
1507 return error;
1508 }
1509
1510 return 0;
1511 }
1512
1513 static void wacom_init_work(struct work_struct *work)
1514 {
1515 struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1516
1517 _wacom_query_tablet_data(wacom);
1518 wacom_led_control(wacom);
1519 }
1520
1521 static void wacom_query_tablet_data(struct wacom *wacom)
1522 {
1523 schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1524 }
1525
1526 static enum power_supply_property wacom_battery_props[] = {
1527 POWER_SUPPLY_PROP_MODEL_NAME,
1528 POWER_SUPPLY_PROP_PRESENT,
1529 POWER_SUPPLY_PROP_STATUS,
1530 POWER_SUPPLY_PROP_SCOPE,
1531 POWER_SUPPLY_PROP_CAPACITY
1532 };
1533
1534 static int wacom_battery_get_property(struct power_supply *psy,
1535 enum power_supply_property psp,
1536 union power_supply_propval *val)
1537 {
1538 struct wacom_battery *battery = power_supply_get_drvdata(psy);
1539 int ret = 0;
1540
1541 switch (psp) {
1542 case POWER_SUPPLY_PROP_MODEL_NAME:
1543 val->strval = battery->wacom->wacom_wac.name;
1544 break;
1545 case POWER_SUPPLY_PROP_PRESENT:
1546 val->intval = battery->bat_connected;
1547 break;
1548 case POWER_SUPPLY_PROP_SCOPE:
1549 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1550 break;
1551 case POWER_SUPPLY_PROP_CAPACITY:
1552 val->intval = battery->battery_capacity;
1553 break;
1554 case POWER_SUPPLY_PROP_STATUS:
1555 if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
1556 val->intval = battery->bat_status;
1557 else if (battery->bat_charging)
1558 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1559 else if (battery->battery_capacity == 100 &&
1560 battery->ps_connected)
1561 val->intval = POWER_SUPPLY_STATUS_FULL;
1562 else if (battery->ps_connected)
1563 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1564 else
1565 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1566 break;
1567 default:
1568 ret = -EINVAL;
1569 break;
1570 }
1571
1572 return ret;
1573 }
1574
1575 static int __wacom_initialize_battery(struct wacom *wacom,
1576 struct wacom_battery *battery)
1577 {
1578 static atomic_t battery_no = ATOMIC_INIT(0);
1579 struct device *dev = &wacom->hdev->dev;
1580 struct power_supply_config psy_cfg = { .drv_data = battery, };
1581 struct power_supply *ps_bat;
1582 struct power_supply_desc *bat_desc = &battery->bat_desc;
1583 unsigned long n;
1584 int error;
1585
1586 if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1587 return -ENOMEM;
1588
1589 battery->wacom = wacom;
1590
1591 n = atomic_inc_return(&battery_no) - 1;
1592
1593 bat_desc->properties = wacom_battery_props;
1594 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1595 bat_desc->get_property = wacom_battery_get_property;
1596 sprintf(battery->bat_name, "wacom_battery_%ld", n);
1597 bat_desc->name = battery->bat_name;
1598 bat_desc->type = POWER_SUPPLY_TYPE_USB;
1599 bat_desc->use_for_apm = 0;
1600
1601 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1602 if (IS_ERR(ps_bat)) {
1603 error = PTR_ERR(ps_bat);
1604 goto err;
1605 }
1606
1607 power_supply_powers(ps_bat, &wacom->hdev->dev);
1608
1609 battery->battery = ps_bat;
1610
1611 devres_close_group(dev, bat_desc);
1612 return 0;
1613
1614 err:
1615 devres_release_group(dev, bat_desc);
1616 return error;
1617 }
1618
1619 static int wacom_initialize_battery(struct wacom *wacom)
1620 {
1621 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1622 return __wacom_initialize_battery(wacom, &wacom->battery);
1623
1624 return 0;
1625 }
1626
1627 static void wacom_destroy_battery(struct wacom *wacom)
1628 {
1629 if (wacom->battery.battery) {
1630 devres_release_group(&wacom->hdev->dev,
1631 &wacom->battery.bat_desc);
1632 wacom->battery.battery = NULL;
1633 }
1634 }
1635
1636 static ssize_t wacom_show_speed(struct device *dev,
1637 struct device_attribute
1638 *attr, char *buf)
1639 {
1640 struct hid_device *hdev = to_hid_device(dev);
1641 struct wacom *wacom = hid_get_drvdata(hdev);
1642
1643 return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1644 }
1645
1646 static ssize_t wacom_store_speed(struct device *dev,
1647 struct device_attribute *attr,
1648 const char *buf, size_t count)
1649 {
1650 struct hid_device *hdev = to_hid_device(dev);
1651 struct wacom *wacom = hid_get_drvdata(hdev);
1652 u8 new_speed;
1653
1654 if (kstrtou8(buf, 0, &new_speed))
1655 return -EINVAL;
1656
1657 if (new_speed != 0 && new_speed != 1)
1658 return -EINVAL;
1659
1660 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1661
1662 return count;
1663 }
1664
1665 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1666 wacom_show_speed, wacom_store_speed);
1667
1668
1669 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1670 struct kobj_attribute *kattr,
1671 char *buf, int index)
1672 {
1673 struct device *dev = kobj_to_dev(kobj->parent);
1674 struct hid_device *hdev = to_hid_device(dev);
1675 struct wacom *wacom = hid_get_drvdata(hdev);
1676 u8 mode;
1677
1678 mode = wacom->led.groups[index].select;
1679 return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
1680 }
1681
1682 #define DEVICE_EKR_ATTR_GROUP(SET_ID) \
1683 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \
1684 struct kobj_attribute *kattr, char *buf) \
1685 { \
1686 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \
1687 } \
1688 static struct kobj_attribute remote##SET_ID##_mode_attr = { \
1689 .attr = {.name = "remote_mode", \
1690 .mode = DEV_ATTR_RO_PERM}, \
1691 .show = wacom_show_remote##SET_ID##_mode, \
1692 }; \
1693 static struct attribute *remote##SET_ID##_serial_attrs[] = { \
1694 &remote##SET_ID##_mode_attr.attr, \
1695 NULL \
1696 }; \
1697 static struct attribute_group remote##SET_ID##_serial_group = { \
1698 .name = NULL, \
1699 .attrs = remote##SET_ID##_serial_attrs, \
1700 }
1701
1702 DEVICE_EKR_ATTR_GROUP(0);
1703 DEVICE_EKR_ATTR_GROUP(1);
1704 DEVICE_EKR_ATTR_GROUP(2);
1705 DEVICE_EKR_ATTR_GROUP(3);
1706 DEVICE_EKR_ATTR_GROUP(4);
1707
1708 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1709 int index)
1710 {
1711 int error = 0;
1712 struct wacom_remote *remote = wacom->remote;
1713
1714 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1715 GFP_KERNEL,
1716 "%d", serial);
1717 if (!remote->remotes[index].group.name)
1718 return -ENOMEM;
1719
1720 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1721 &remote->remotes[index].group);
1722 if (error) {
1723 remote->remotes[index].group.name = NULL;
1724 hid_err(wacom->hdev,
1725 "cannot create sysfs group err: %d\n", error);
1726 return error;
1727 }
1728
1729 return 0;
1730 }
1731
1732 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1733 {
1734 const size_t buf_size = 2;
1735 unsigned char *buf;
1736 int retval;
1737
1738 buf = kzalloc(buf_size, GFP_KERNEL);
1739 if (!buf)
1740 return -ENOMEM;
1741
1742 buf[0] = WAC_CMD_DELETE_PAIRING;
1743 buf[1] = selector;
1744
1745 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1746 buf_size, WAC_CMD_RETRIES);
1747 kfree(buf);
1748
1749 return retval;
1750 }
1751
1752 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1753 struct kobj_attribute *attr,
1754 const char *buf, size_t count)
1755 {
1756 unsigned char selector = 0;
1757 struct device *dev = kobj_to_dev(kobj->parent);
1758 struct hid_device *hdev = to_hid_device(dev);
1759 struct wacom *wacom = hid_get_drvdata(hdev);
1760 int err;
1761
1762 if (!strncmp(buf, "*\n", 2)) {
1763 selector = WAC_CMD_UNPAIR_ALL;
1764 } else {
1765 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1766 buf);
1767 return -1;
1768 }
1769
1770 mutex_lock(&wacom->lock);
1771
1772 err = wacom_cmd_unpair_remote(wacom, selector);
1773 mutex_unlock(&wacom->lock);
1774
1775 return err < 0 ? err : count;
1776 }
1777
1778 static struct kobj_attribute unpair_remote_attr = {
1779 .attr = {.name = "unpair_remote", .mode = 0200},
1780 .store = wacom_store_unpair_remote,
1781 };
1782
1783 static const struct attribute *remote_unpair_attrs[] = {
1784 &unpair_remote_attr.attr,
1785 NULL
1786 };
1787
1788 static void wacom_remotes_destroy(void *data)
1789 {
1790 struct wacom *wacom = data;
1791 struct wacom_remote *remote = wacom->remote;
1792
1793 if (!remote)
1794 return;
1795
1796 kobject_put(remote->remote_dir);
1797 kfifo_free(&remote->remote_fifo);
1798 wacom->remote = NULL;
1799 }
1800
1801 static int wacom_initialize_remotes(struct wacom *wacom)
1802 {
1803 int error = 0;
1804 struct wacom_remote *remote;
1805 int i;
1806
1807 if (wacom->wacom_wac.features.type != REMOTE)
1808 return 0;
1809
1810 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1811 GFP_KERNEL);
1812 if (!remote)
1813 return -ENOMEM;
1814
1815 wacom->remote = remote;
1816
1817 spin_lock_init(&remote->remote_lock);
1818
1819 error = kfifo_alloc(&remote->remote_fifo,
1820 5 * sizeof(struct wacom_remote_data),
1821 GFP_KERNEL);
1822 if (error) {
1823 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1824 return -ENOMEM;
1825 }
1826
1827 remote->remotes[0].group = remote0_serial_group;
1828 remote->remotes[1].group = remote1_serial_group;
1829 remote->remotes[2].group = remote2_serial_group;
1830 remote->remotes[3].group = remote3_serial_group;
1831 remote->remotes[4].group = remote4_serial_group;
1832
1833 remote->remote_dir = kobject_create_and_add("wacom_remote",
1834 &wacom->hdev->dev.kobj);
1835 if (!remote->remote_dir)
1836 return -ENOMEM;
1837
1838 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1839
1840 if (error) {
1841 hid_err(wacom->hdev,
1842 "cannot create sysfs group err: %d\n", error);
1843 return error;
1844 }
1845
1846 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1847 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1848 remote->remotes[i].serial = 0;
1849 }
1850
1851 error = devm_add_action_or_reset(&wacom->hdev->dev,
1852 wacom_remotes_destroy, wacom);
1853 if (error)
1854 return error;
1855
1856 return 0;
1857 }
1858
1859 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1860 {
1861 struct input_dev *input_dev;
1862 struct hid_device *hdev = wacom->hdev;
1863 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1864
1865 input_dev = devm_input_allocate_device(&hdev->dev);
1866 if (!input_dev)
1867 return NULL;
1868
1869 input_dev->name = wacom_wac->features.name;
1870 input_dev->phys = hdev->phys;
1871 input_dev->dev.parent = &hdev->dev;
1872 input_dev->open = wacom_open;
1873 input_dev->close = wacom_close;
1874 input_dev->uniq = hdev->uniq;
1875 input_dev->id.bustype = hdev->bus;
1876 input_dev->id.vendor = hdev->vendor;
1877 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1878 input_dev->id.version = hdev->version;
1879 input_set_drvdata(input_dev, wacom);
1880
1881 return input_dev;
1882 }
1883
1884 static int wacom_allocate_inputs(struct wacom *wacom)
1885 {
1886 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1887
1888 wacom_wac->pen_input = wacom_allocate_input(wacom);
1889 wacom_wac->touch_input = wacom_allocate_input(wacom);
1890 wacom_wac->pad_input = wacom_allocate_input(wacom);
1891 if (!wacom_wac->pen_input ||
1892 !wacom_wac->touch_input ||
1893 !wacom_wac->pad_input)
1894 return -ENOMEM;
1895
1896 wacom_wac->pen_input->name = wacom_wac->pen_name;
1897 wacom_wac->touch_input->name = wacom_wac->touch_name;
1898 wacom_wac->pad_input->name = wacom_wac->pad_name;
1899
1900 return 0;
1901 }
1902
1903 static int wacom_register_inputs(struct wacom *wacom)
1904 {
1905 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1906 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1907 int error = 0;
1908
1909 pen_input_dev = wacom_wac->pen_input;
1910 touch_input_dev = wacom_wac->touch_input;
1911 pad_input_dev = wacom_wac->pad_input;
1912
1913 if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1914 return -EINVAL;
1915
1916 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1917 if (error) {
1918 /* no pen in use on this interface */
1919 input_free_device(pen_input_dev);
1920 wacom_wac->pen_input = NULL;
1921 pen_input_dev = NULL;
1922 } else {
1923 error = input_register_device(pen_input_dev);
1924 if (error)
1925 goto fail;
1926 }
1927
1928 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1929 if (error) {
1930 /* no touch in use on this interface */
1931 input_free_device(touch_input_dev);
1932 wacom_wac->touch_input = NULL;
1933 touch_input_dev = NULL;
1934 } else {
1935 error = input_register_device(touch_input_dev);
1936 if (error)
1937 goto fail;
1938 }
1939
1940 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1941 if (error) {
1942 /* no pad in use on this interface */
1943 input_free_device(pad_input_dev);
1944 wacom_wac->pad_input = NULL;
1945 pad_input_dev = NULL;
1946 } else {
1947 error = input_register_device(pad_input_dev);
1948 if (error)
1949 goto fail;
1950 }
1951
1952 return 0;
1953
1954 fail:
1955 wacom_wac->pad_input = NULL;
1956 wacom_wac->touch_input = NULL;
1957 wacom_wac->pen_input = NULL;
1958 return error;
1959 }
1960
1961 /*
1962 * Not all devices report physical dimensions from HID.
1963 * Compute the default from hardcoded logical dimension
1964 * and resolution before driver overwrites them.
1965 */
1966 static void wacom_set_default_phy(struct wacom_features *features)
1967 {
1968 if (features->x_resolution) {
1969 features->x_phy = (features->x_max * 100) /
1970 features->x_resolution;
1971 features->y_phy = (features->y_max * 100) /
1972 features->y_resolution;
1973 }
1974 }
1975
1976 static void wacom_calculate_res(struct wacom_features *features)
1977 {
1978 /* set unit to "100th of a mm" for devices not reported by HID */
1979 if (!features->unit) {
1980 features->unit = 0x11;
1981 features->unitExpo = -3;
1982 }
1983
1984 features->x_resolution = wacom_calc_hid_res(features->x_max,
1985 features->x_phy,
1986 features->unit,
1987 features->unitExpo);
1988 features->y_resolution = wacom_calc_hid_res(features->y_max,
1989 features->y_phy,
1990 features->unit,
1991 features->unitExpo);
1992 }
1993
1994 void wacom_battery_work(struct work_struct *work)
1995 {
1996 struct wacom *wacom = container_of(work, struct wacom, battery_work);
1997
1998 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1999 !wacom->battery.battery) {
2000 wacom_initialize_battery(wacom);
2001 }
2002 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2003 wacom->battery.battery) {
2004 wacom_destroy_battery(wacom);
2005 }
2006 }
2007
2008 static size_t wacom_compute_pktlen(struct hid_device *hdev)
2009 {
2010 struct hid_report_enum *report_enum;
2011 struct hid_report *report;
2012 size_t size = 0;
2013
2014 report_enum = hdev->report_enum + HID_INPUT_REPORT;
2015
2016 list_for_each_entry(report, &report_enum->report_list, list) {
2017 size_t report_size = hid_report_len(report);
2018 if (report_size > size)
2019 size = report_size;
2020 }
2021
2022 return size;
2023 }
2024
2025 static void wacom_update_name(struct wacom *wacom, const char *suffix)
2026 {
2027 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2028 struct wacom_features *features = &wacom_wac->features;
2029 char name[WACOM_NAME_MAX];
2030
2031 /* Generic devices name unspecified */
2032 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2033 char *product_name = wacom->hdev->name;
2034
2035 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
2036 struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
2037 struct usb_device *dev = interface_to_usbdev(intf);
2038 product_name = dev->product;
2039 }
2040
2041 if (wacom->hdev->bus == BUS_I2C) {
2042 snprintf(name, sizeof(name), "%s %X",
2043 features->name, wacom->hdev->product);
2044 } else if (strstr(product_name, "Wacom") ||
2045 strstr(product_name, "wacom") ||
2046 strstr(product_name, "WACOM")) {
2047 strlcpy(name, product_name, sizeof(name));
2048 } else {
2049 snprintf(name, sizeof(name), "Wacom %s", product_name);
2050 }
2051
2052 /* strip out excess whitespaces */
2053 while (1) {
2054 char *gap = strstr(name, " ");
2055 if (gap == NULL)
2056 break;
2057 /* shift everything including the terminator */
2058 memmove(gap, gap+1, strlen(gap));
2059 }
2060
2061 /* get rid of trailing whitespace */
2062 if (name[strlen(name)-1] == ' ')
2063 name[strlen(name)-1] = '\0';
2064 } else {
2065 strlcpy(name, features->name, sizeof(name));
2066 }
2067
2068 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2069 name, suffix);
2070
2071 /* Append the device type to the name */
2072 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
2073 "%s%s Pen", name, suffix);
2074 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
2075 "%s%s Finger", name, suffix);
2076 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
2077 "%s%s Pad", name, suffix);
2078 }
2079
2080 static 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
2096 static 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
2103 if (wacom_wac->has_mute_touch_switch) {
2104 wacom_wac->shared->has_mute_touch_switch = true;
2105 wacom_wac->shared->is_touch_on = true;
2106 }
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
2116 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2117 {
2118 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2119 struct wacom_features *features = &wacom_wac->features;
2120 struct hid_device *hdev = wacom->hdev;
2121 int error;
2122 unsigned int connect_mask = HID_CONNECT_HIDRAW;
2123
2124 features->pktlen = wacom_compute_pktlen(hdev);
2125 if (features->pktlen > WACOM_PKGLEN_MAX)
2126 return -EINVAL;
2127
2128 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2129 return -ENOMEM;
2130
2131 wacom->resources = true;
2132
2133 error = wacom_allocate_inputs(wacom);
2134 if (error)
2135 goto fail;
2136
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;
2148 goto fail;
2149 }
2150 }
2151
2152 /* set the default size in case we do not get them from hid */
2153 wacom_set_default_phy(features);
2154
2155 /* Retrieve the physical and logical size for touch devices */
2156 wacom_retrieve_hid_descriptor(hdev, features);
2157 wacom_setup_device_quirks(wacom);
2158
2159 if (features->device_type == WACOM_DEVICETYPE_NONE &&
2160 features->type != WIRELESS) {
2161 error = features->type == HID_GENERIC ? -ENODEV : 0;
2162
2163 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2164 hdev->name,
2165 error ? "Ignoring" : "Assuming pen");
2166
2167 if (error)
2168 goto fail;
2169
2170 features->device_type |= WACOM_DEVICETYPE_PEN;
2171 }
2172
2173 wacom_calculate_res(features);
2174
2175 wacom_update_name(wacom, wireless ? " (WL)" : "");
2176
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
2185 error = wacom_add_shared_data(hdev);
2186 if (error)
2187 goto fail;
2188
2189 if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2190 (features->quirks & WACOM_QUIRK_BATTERY)) {
2191 error = wacom_initialize_battery(wacom);
2192 if (error)
2193 goto fail;
2194 }
2195
2196 error = wacom_register_inputs(wacom);
2197 if (error)
2198 goto fail;
2199
2200 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2201 error = wacom_initialize_leds(wacom);
2202 if (error)
2203 goto fail;
2204
2205 error = wacom_initialize_remotes(wacom);
2206 if (error)
2207 goto fail;
2208 }
2209
2210 if (features->type == HID_GENERIC)
2211 connect_mask |= HID_CONNECT_DRIVER;
2212
2213 /* Regular HID work starts now */
2214 error = hid_hw_start(hdev, connect_mask);
2215 if (error) {
2216 hid_err(hdev, "hw start failed\n");
2217 goto fail;
2218 }
2219
2220 if (!wireless) {
2221 /* Note that if query fails it is not a hard failure */
2222 wacom_query_tablet_data(wacom);
2223 }
2224
2225 /* touch only Bamboo doesn't support pen */
2226 if ((features->type == BAMBOO_TOUCH) &&
2227 (features->device_type & WACOM_DEVICETYPE_PEN)) {
2228 cancel_delayed_work_sync(&wacom->init_work);
2229 _wacom_query_tablet_data(wacom);
2230 error = -ENODEV;
2231 goto fail_quirks;
2232 }
2233
2234 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2235 error = hid_hw_open(hdev);
2236
2237 wacom_set_shared_values(wacom_wac);
2238 devres_close_group(&hdev->dev, wacom);
2239
2240 return 0;
2241
2242 fail_quirks:
2243 hid_hw_stop(hdev);
2244 fail:
2245 wacom_release_resources(wacom);
2246 return error;
2247 }
2248
2249 static void wacom_wireless_work(struct work_struct *work)
2250 {
2251 struct wacom *wacom = container_of(work, struct wacom, wireless_work);
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);
2270 wacom_release_resources(wacom1);
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);
2276 wacom_release_resources(wacom2);
2277
2278 if (wacom_wac->pid == 0) {
2279 hid_info(wacom->hdev, "wireless tablet disconnected\n");
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);
2301
2302 wacom_wac1->pid = wacom_wac->pid;
2303 hid_hw_stop(hdev1);
2304 error = wacom_parse_and_register(wacom1, true);
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);
2314 wacom_wac2->pid = wacom_wac->pid;
2315 hid_hw_stop(hdev2);
2316 error = wacom_parse_and_register(wacom2, true);
2317 if (error)
2318 goto fail;
2319 }
2320
2321 strlcpy(wacom_wac->name, wacom_wac1->name,
2322 sizeof(wacom_wac->name));
2323 error = wacom_initialize_battery(wacom);
2324 if (error)
2325 goto fail;
2326 }
2327
2328 return;
2329
2330 fail:
2331 wacom_release_resources(wacom1);
2332 wacom_release_resources(wacom2);
2333 return;
2334 }
2335
2336 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2337 {
2338 struct wacom_remote *remote = wacom->remote;
2339 u32 serial = remote->remotes[index].serial;
2340 int i;
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);
2346
2347 if (remote->remotes[index].battery.battery)
2348 devres_release_group(&wacom->hdev->dev,
2349 &remote->remotes[index].battery.bat_desc);
2350
2351 if (remote->remotes[index].group.name)
2352 devres_release_group(&wacom->hdev->dev,
2353 &remote->remotes[index]);
2354
2355 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2356 if (remote->remotes[i].serial == serial) {
2357 remote->remotes[i].serial = 0;
2358 remote->remotes[i].group.name = NULL;
2359 remote->remotes[i].registered = false;
2360 remote->remotes[i].battery.battery = NULL;
2361 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2362 }
2363 }
2364 }
2365
2366 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2367 unsigned int index)
2368 {
2369 struct wacom_remote *remote = wacom->remote;
2370 struct device *dev = &wacom->hdev->dev;
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++) {
2377 if (remote->remotes[k].serial == serial)
2378 break;
2379 }
2380
2381 if (k < WACOM_MAX_REMOTES) {
2382 remote->remotes[index].serial = serial;
2383 return 0;
2384 }
2385
2386 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2387 return -ENOMEM;
2388
2389 error = wacom_remote_create_attr_group(wacom, serial, index);
2390 if (error)
2391 goto fail;
2392
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
2411 remote->remotes[index].serial = serial;
2412
2413 error = input_register_device(remote->remotes[index].input);
2414 if (error)
2415 goto fail;
2416
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
2423 remote->remotes[index].registered = true;
2424
2425 devres_close_group(dev, &remote->remotes[index]);
2426 return 0;
2427
2428 fail:
2429 devres_release_group(dev, &remote->remotes[index]);
2430 remote->remotes[index].serial = 0;
2431 return error;
2432 }
2433
2434 static 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
2456 static void wacom_remote_work(struct work_struct *work)
2457 {
2458 struct wacom *wacom = container_of(work, struct wacom, remote_work);
2459 struct wacom_remote *remote = wacom->remote;
2460 struct wacom_remote_data data;
2461 unsigned long flags;
2462 unsigned int count;
2463 u32 serial;
2464 int i;
2465
2466 spin_lock_irqsave(&remote->remote_lock, flags);
2467
2468 count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2469
2470 if (count != sizeof(data)) {
2471 hid_err(wacom->hdev,
2472 "workitem triggered without status available\n");
2473 spin_unlock_irqrestore(&remote->remote_lock, flags);
2474 return;
2475 }
2476
2477 if (!kfifo_is_empty(&remote->remote_fifo))
2478 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2479
2480 spin_unlock_irqrestore(&remote->remote_lock, flags);
2481
2482 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2483 serial = data.remote[i].serial;
2484 if (data.remote[i].connected) {
2485
2486 if (remote->remotes[i].serial == serial) {
2487 wacom_remote_attach_battery(wacom, i);
2488 continue;
2489 }
2490
2491 if (remote->remotes[i].serial)
2492 wacom_remote_destroy_one(wacom, i);
2493
2494 wacom_remote_create_one(wacom, serial, i);
2495
2496 } else if (remote->remotes[i].serial) {
2497 wacom_remote_destroy_one(wacom, i);
2498 }
2499 }
2500 }
2501
2502 static 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
2539 return;
2540 }
2541
2542 static 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
2560 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
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;
2573 goto fail;
2574 }
2575
2576 wacom_wac->hid_data.inputmode = -1;
2577 wacom_wac->mode_report = -1;
2578
2579 wacom->usbdev = dev;
2580 wacom->intf = intf;
2581 mutex_init(&wacom->lock);
2582 INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
2583 INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2584 INIT_WORK(&wacom->battery_work, wacom_battery_work);
2585 INIT_WORK(&wacom->remote_work, wacom_remote_work);
2586 INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
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");
2592 goto fail;
2593 }
2594
2595 error = wacom_parse_and_register(wacom, false);
2596 if (error)
2597 goto fail;
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
2609 fail:
2610 hid_set_drvdata(hdev, NULL);
2611 return error;
2612 }
2613
2614 static void wacom_remove(struct hid_device *hdev)
2615 {
2616 struct wacom *wacom = hid_get_drvdata(hdev);
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);
2622
2623 hid_hw_stop(hdev);
2624
2625 cancel_delayed_work_sync(&wacom->init_work);
2626 cancel_work_sync(&wacom->wireless_work);
2627 cancel_work_sync(&wacom->battery_work);
2628 cancel_work_sync(&wacom->remote_work);
2629 cancel_work_sync(&wacom->mode_change_work);
2630 if (hdev->bus == BUS_BLUETOOTH)
2631 device_remove_file(&hdev->dev, &dev_attr_speed);
2632
2633 /* make sure we don't trigger the LEDs */
2634 wacom_led_groups_release(wacom);
2635
2636 if (wacom->wacom_wac.features.type != REMOTE)
2637 wacom_release_resources(wacom);
2638
2639 hid_set_drvdata(hdev, NULL);
2640 }
2641
2642 #ifdef CONFIG_PM
2643 static int wacom_resume(struct hid_device *hdev)
2644 {
2645 struct wacom *wacom = hid_get_drvdata(hdev);
2646
2647 mutex_lock(&wacom->lock);
2648
2649 /* switch to wacom mode first */
2650 _wacom_query_tablet_data(wacom);
2651 wacom_led_control(wacom);
2652
2653 mutex_unlock(&wacom->lock);
2654
2655 return 0;
2656 }
2657
2658 static int wacom_reset_resume(struct hid_device *hdev)
2659 {
2660 return wacom_resume(hdev);
2661 }
2662 #endif /* CONFIG_PM */
2663
2664 static struct hid_driver wacom_driver = {
2665 .name = "wacom",
2666 .id_table = wacom_ids,
2667 .probe = wacom_probe,
2668 .remove = wacom_remove,
2669 .report = wacom_wac_report,
2670 #ifdef CONFIG_PM
2671 .resume = wacom_resume,
2672 .reset_resume = wacom_reset_resume,
2673 #endif
2674 .raw_event = wacom_raw_event,
2675 };
2676 module_hid_driver(wacom_driver);
2677
2678 MODULE_VERSION(DRIVER_VERSION);
2679 MODULE_AUTHOR(DRIVER_AUTHOR);
2680 MODULE_DESCRIPTION(DRIVER_DESC);
2681 MODULE_LICENSE("GPL");
Linux with added FPC-III support