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sh_eth: R8A7740 supports packet shecksumming
[linux/fpc-iii.git] / drivers / hid / wacom_sys.c
blobb9779bcbd1403f00114f9565c543df79583baa38
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
20 #define WAC_CMD_WL_LED_CONTROL 0x03
21 #define WAC_CMD_LED_CONTROL 0x20
22 #define WAC_CMD_ICON_START 0x21
23 #define WAC_CMD_ICON_XFER 0x23
24 #define WAC_CMD_ICON_BT_XFER 0x26
25 #define WAC_CMD_RETRIES 10
26 #define WAC_CMD_DELETE_PAIRING 0x20
27 #define WAC_CMD_UNPAIR_ALL 0xFF
28
29 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
30 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
31 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
32
33 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
34 size_t size, unsigned int retries)
35 {
36 int retval;
37
38 do {
39 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
40 HID_REQ_GET_REPORT);
41 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
42
43 if (retval < 0)
44 hid_err(hdev, "wacom_get_report: ran out of retries "
45 "(last error = %d)\n", retval);
46
47 return retval;
48 }
49
50 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
51 size_t size, unsigned int retries)
52 {
53 int retval;
54
55 do {
56 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
57 HID_REQ_SET_REPORT);
58 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
59
60 if (retval < 0)
61 hid_err(hdev, "wacom_set_report: ran out of retries "
62 "(last error = %d)\n", retval);
63
64 return retval;
65 }
66
67 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
68 u8 *raw_data, int size)
69 {
70 struct wacom *wacom = hid_get_drvdata(hdev);
71
72 if (size > WACOM_PKGLEN_MAX)
73 return 1;
74
75 memcpy(wacom->wacom_wac.data, raw_data, size);
76
77 wacom_wac_irq(&wacom->wacom_wac, size);
78
79 return 0;
80 }
81
82 static int wacom_open(struct input_dev *dev)
83 {
84 struct wacom *wacom = input_get_drvdata(dev);
85
86 return hid_hw_open(wacom->hdev);
87 }
88
89 static void wacom_close(struct input_dev *dev)
90 {
91 struct wacom *wacom = input_get_drvdata(dev);
92
93 /*
94 * wacom->hdev should never be null, but surprisingly, I had the case
95 * once while unplugging the Wacom Wireless Receiver.
96 */
97 if (wacom->hdev)
98 hid_hw_close(wacom->hdev);
99 }
100
101 /*
102 * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
103 */
104 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
105 unsigned unit, int exponent)
106 {
107 struct hid_field field = {
108 .logical_maximum = logical_extents,
109 .physical_maximum = physical_extents,
110 .unit = unit,
111 .unit_exponent = exponent,
112 };
113
114 return hidinput_calc_abs_res(&field, ABS_X);
115 }
116
117 static void wacom_feature_mapping(struct hid_device *hdev,
118 struct hid_field *field, struct hid_usage *usage)
119 {
120 struct wacom *wacom = hid_get_drvdata(hdev);
121 struct wacom_features *features = &wacom->wacom_wac.features;
122 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
123 u8 *data;
124 int ret;
125 int n;
126
127 switch (usage->hid) {
128 case HID_DG_CONTACTMAX:
129 /* leave touch_max as is if predefined */
130 if (!features->touch_max) {
131 /* read manually */
132 data = kzalloc(2, GFP_KERNEL);
133 if (!data)
134 break;
135 data[0] = field->report->id;
136 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
137 data, 2, WAC_CMD_RETRIES);
138 if (ret == 2) {
139 features->touch_max = data[1];
140 } else {
141 features->touch_max = 16;
142 hid_warn(hdev, "wacom_feature_mapping: "
143 "could not get HID_DG_CONTACTMAX, "
144 "defaulting to %d\n",
145 features->touch_max);
146 }
147 kfree(data);
148 }
149 break;
150 case HID_DG_INPUTMODE:
151 /* Ignore if value index is out of bounds. */
152 if (usage->usage_index >= field->report_count) {
153 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
154 break;
155 }
156
157 hid_data->inputmode = field->report->id;
158 hid_data->inputmode_index = usage->usage_index;
159 break;
160
161 case HID_UP_DIGITIZER:
162 if (field->report->id == 0x0B &&
163 (field->application == WACOM_HID_G9_PEN ||
164 field->application == WACOM_HID_G11_PEN)) {
165 wacom->wacom_wac.mode_report = field->report->id;
166 wacom->wacom_wac.mode_value = 0;
167 }
168 break;
169
170 case WACOM_HID_WD_DATAMODE:
171 wacom->wacom_wac.mode_report = field->report->id;
172 wacom->wacom_wac.mode_value = 2;
173 break;
174
175 case WACOM_HID_UP_G9:
176 case WACOM_HID_UP_G11:
177 if (field->report->id == 0x03 &&
178 (field->application == WACOM_HID_G9_TOUCHSCREEN ||
179 field->application == WACOM_HID_G11_TOUCHSCREEN)) {
180 wacom->wacom_wac.mode_report = field->report->id;
181 wacom->wacom_wac.mode_value = 0;
182 }
183 break;
184 case WACOM_HID_WD_OFFSETLEFT:
185 case WACOM_HID_WD_OFFSETTOP:
186 case WACOM_HID_WD_OFFSETRIGHT:
187 case WACOM_HID_WD_OFFSETBOTTOM:
188 /* read manually */
189 n = hid_report_len(field->report);
190 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
191 if (!data)
192 break;
193 data[0] = field->report->id;
194 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
195 data, n, WAC_CMD_RETRIES);
196 if (ret == n) {
197 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
198 data, n, 0);
199 } else {
200 hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
201 __func__);
202 }
203 kfree(data);
204 break;
205 }
206 }
207
208 /*
209 * Interface Descriptor of wacom devices can be incomplete and
210 * inconsistent so wacom_features table is used to store stylus
211 * device's packet lengths, various maximum values, and tablet
212 * resolution based on product ID's.
213 *
214 * For devices that contain 2 interfaces, wacom_features table is
215 * inaccurate for the touch interface. Since the Interface Descriptor
216 * for touch interfaces has pretty complete data, this function exists
217 * to query tablet for this missing information instead of hard coding in
218 * an additional table.
219 *
220 * A typical Interface Descriptor for a stylus will contain a
221 * boot mouse application collection that is not of interest and this
222 * function will ignore it.
223 *
224 * It also contains a digitizer application collection that also is not
225 * of interest since any information it contains would be duplicate
226 * of what is in wacom_features. Usually it defines a report of an array
227 * of bytes that could be used as max length of the stylus packet returned.
228 * If it happens to define a Digitizer-Stylus Physical Collection then
229 * the X and Y logical values contain valid data but it is ignored.
230 *
231 * A typical Interface Descriptor for a touch interface will contain a
232 * Digitizer-Finger Physical Collection which will define both logical
233 * X/Y maximum as well as the physical size of tablet. Since touch
234 * interfaces haven't supported pressure or distance, this is enough
235 * information to override invalid values in the wacom_features table.
236 *
237 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
238 * data. We deal with them after returning from this function.
239 */
240 static void wacom_usage_mapping(struct hid_device *hdev,
241 struct hid_field *field, struct hid_usage *usage)
242 {
243 struct wacom *wacom = hid_get_drvdata(hdev);
244 struct wacom_features *features = &wacom->wacom_wac.features;
245 bool finger = WACOM_FINGER_FIELD(field);
246 bool pen = WACOM_PEN_FIELD(field);
247
248 /*
249 * Requiring Stylus Usage will ignore boot mouse
250 * X/Y values and some cases of invalid Digitizer X/Y
251 * values commonly reported.
252 */
253 if (pen)
254 features->device_type |= WACOM_DEVICETYPE_PEN;
255 else if (finger)
256 features->device_type |= WACOM_DEVICETYPE_TOUCH;
257 else
258 return;
259
260 /*
261 * Bamboo models do not support HID_DG_CONTACTMAX.
262 * And, Bamboo Pen only descriptor contains touch.
263 */
264 if (features->type > BAMBOO_PT) {
265 /* ISDv4 touch devices at least supports one touch point */
266 if (finger && !features->touch_max)
267 features->touch_max = 1;
268 }
269
270 /*
271 * ISDv4 devices which predate HID's adoption of the
272 * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
273 * position instead. We can accurately detect if a
274 * usage with that value should be HID_DG_BARRELSWITCH2
275 * based on the surrounding usages, which have remained
276 * constant across generations.
277 */
278 if (features->type == HID_GENERIC &&
279 usage->hid == 0x000D0000 &&
280 field->application == HID_DG_PEN &&
281 field->physical == HID_DG_STYLUS) {
282 int i = usage->usage_index;
283
284 if (i-4 >= 0 && i+1 < field->maxusage &&
285 field->usage[i-4].hid == HID_DG_TIPSWITCH &&
286 field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
287 field->usage[i-2].hid == HID_DG_ERASER &&
288 field->usage[i-1].hid == HID_DG_INVERT &&
289 field->usage[i+1].hid == HID_DG_INRANGE) {
290 usage->hid = HID_DG_BARRELSWITCH2;
291 }
292 }
293
294 switch (usage->hid) {
295 case HID_GD_X:
296 features->x_max = field->logical_maximum;
297 if (finger) {
298 features->x_phy = field->physical_maximum;
299 if ((features->type != BAMBOO_PT) &&
300 (features->type != BAMBOO_TOUCH)) {
301 features->unit = field->unit;
302 features->unitExpo = field->unit_exponent;
303 }
304 }
305 break;
306 case HID_GD_Y:
307 features->y_max = field->logical_maximum;
308 if (finger) {
309 features->y_phy = field->physical_maximum;
310 if ((features->type != BAMBOO_PT) &&
311 (features->type != BAMBOO_TOUCH)) {
312 features->unit = field->unit;
313 features->unitExpo = field->unit_exponent;
314 }
315 }
316 break;
317 case HID_DG_TIPPRESSURE:
318 if (pen)
319 features->pressure_max = field->logical_maximum;
320 break;
321 }
322
323 if (features->type == HID_GENERIC)
324 wacom_wac_usage_mapping(hdev, field, usage);
325 }
326
327 static void wacom_post_parse_hid(struct hid_device *hdev,
328 struct wacom_features *features)
329 {
330 struct wacom *wacom = hid_get_drvdata(hdev);
331 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
332
333 if (features->type == HID_GENERIC) {
334 /* Any last-minute generic device setup */
335 if (features->touch_max > 1) {
336 input_mt_init_slots(wacom_wac->touch_input, wacom_wac->features.touch_max,
337 INPUT_MT_DIRECT);
338 }
339 }
340 }
341
342 static void wacom_parse_hid(struct hid_device *hdev,
343 struct wacom_features *features)
344 {
345 struct hid_report_enum *rep_enum;
346 struct hid_report *hreport;
347 int i, j;
348
349 /* check features first */
350 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
351 list_for_each_entry(hreport, &rep_enum->report_list, list) {
352 for (i = 0; i < hreport->maxfield; i++) {
353 /* Ignore if report count is out of bounds. */
354 if (hreport->field[i]->report_count < 1)
355 continue;
356
357 for (j = 0; j < hreport->field[i]->maxusage; j++) {
358 wacom_feature_mapping(hdev, hreport->field[i],
359 hreport->field[i]->usage + j);
360 }
361 }
362 }
363
364 /* now check the input usages */
365 rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
366 list_for_each_entry(hreport, &rep_enum->report_list, list) {
367
368 if (!hreport->maxfield)
369 continue;
370
371 for (i = 0; i < hreport->maxfield; i++)
372 for (j = 0; j < hreport->field[i]->maxusage; j++)
373 wacom_usage_mapping(hdev, hreport->field[i],
374 hreport->field[i]->usage + j);
375 }
376
377 wacom_post_parse_hid(hdev, features);
378 }
379
380 static int wacom_hid_set_device_mode(struct hid_device *hdev)
381 {
382 struct wacom *wacom = hid_get_drvdata(hdev);
383 struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
384 struct hid_report *r;
385 struct hid_report_enum *re;
386
387 if (hid_data->inputmode < 0)
388 return 0;
389
390 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
391 r = re->report_id_hash[hid_data->inputmode];
392 if (r) {
393 r->field[0]->value[hid_data->inputmode_index] = 2;
394 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
395 }
396 return 0;
397 }
398
399 static int wacom_set_device_mode(struct hid_device *hdev,
400 struct wacom_wac *wacom_wac)
401 {
402 u8 *rep_data;
403 struct hid_report *r;
404 struct hid_report_enum *re;
405 int length;
406 int error = -ENOMEM, limit = 0;
407
408 if (wacom_wac->mode_report < 0)
409 return 0;
410
411 re = &(hdev->report_enum[HID_FEATURE_REPORT]);
412 r = re->report_id_hash[wacom_wac->mode_report];
413 if (!r)
414 return -EINVAL;
415
416 rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
417 if (!rep_data)
418 return -ENOMEM;
419
420 length = hid_report_len(r);
421
422 do {
423 rep_data[0] = wacom_wac->mode_report;
424 rep_data[1] = wacom_wac->mode_value;
425
426 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
427 length, 1);
428 if (error >= 0)
429 error = wacom_get_report(hdev, HID_FEATURE_REPORT,
430 rep_data, length, 1);
431 } while (error >= 0 &&
432 rep_data[1] != wacom_wac->mode_report &&
433 limit++ < WAC_MSG_RETRIES);
434
435 kfree(rep_data);
436
437 return error < 0 ? error : 0;
438 }
439
440 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
441 struct wacom_features *features)
442 {
443 struct wacom *wacom = hid_get_drvdata(hdev);
444 int ret;
445 u8 rep_data[2];
446
447 switch (features->type) {
448 case GRAPHIRE_BT:
449 rep_data[0] = 0x03;
450 rep_data[1] = 0x00;
451 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
452 3);
453
454 if (ret >= 0) {
455 rep_data[0] = speed == 0 ? 0x05 : 0x06;
456 rep_data[1] = 0x00;
457
458 ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
459 rep_data, 2, 3);
460
461 if (ret >= 0) {
462 wacom->wacom_wac.bt_high_speed = speed;
463 return 0;
464 }
465 }
466
467 /*
468 * Note that if the raw queries fail, it's not a hard failure
469 * and it is safe to continue
470 */
471 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
472 rep_data[0], ret);
473 break;
474 case INTUOS4WL:
475 if (speed == 1)
476 wacom->wacom_wac.bt_features &= ~0x20;
477 else
478 wacom->wacom_wac.bt_features |= 0x20;
479
480 rep_data[0] = 0x03;
481 rep_data[1] = wacom->wacom_wac.bt_features;
482
483 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
484 1);
485 if (ret >= 0)
486 wacom->wacom_wac.bt_high_speed = speed;
487 break;
488 }
489
490 return 0;
491 }
492
493 /*
494 * Switch the tablet into its most-capable mode. Wacom tablets are
495 * typically configured to power-up in a mode which sends mouse-like
496 * reports to the OS. To get absolute position, pressure data, etc.
497 * from the tablet, it is necessary to switch the tablet out of this
498 * mode and into one which sends the full range of tablet data.
499 */
500 static int wacom_query_tablet_data(struct hid_device *hdev,
501 struct wacom_features *features)
502 {
503 struct wacom *wacom = hid_get_drvdata(hdev);
504 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
505
506 if (hdev->bus == BUS_BLUETOOTH)
507 return wacom_bt_query_tablet_data(hdev, 1, features);
508
509 if (features->type != HID_GENERIC) {
510 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
511 if (features->type > TABLETPC) {
512 /* MT Tablet PC touch */
513 wacom_wac->mode_report = 3;
514 wacom_wac->mode_value = 4;
515 } else if (features->type == WACOM_24HDT) {
516 wacom_wac->mode_report = 18;
517 wacom_wac->mode_value = 2;
518 } else if (features->type == WACOM_27QHDT) {
519 wacom_wac->mode_report = 131;
520 wacom_wac->mode_value = 2;
521 } else if (features->type == BAMBOO_PAD) {
522 wacom_wac->mode_report = 2;
523 wacom_wac->mode_value = 2;
524 }
525 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
526 if (features->type <= BAMBOO_PT) {
527 wacom_wac->mode_report = 2;
528 wacom_wac->mode_value = 2;
529 }
530 }
531 }
532
533 wacom_set_device_mode(hdev, wacom_wac);
534
535 if (features->type == HID_GENERIC)
536 return wacom_hid_set_device_mode(hdev);
537
538 return 0;
539 }
540
541 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
542 struct wacom_features *features)
543 {
544 struct wacom *wacom = hid_get_drvdata(hdev);
545 struct usb_interface *intf = wacom->intf;
546
547 /* default features */
548 features->x_fuzz = 4;
549 features->y_fuzz = 4;
550 features->pressure_fuzz = 0;
551 features->distance_fuzz = 1;
552 features->tilt_fuzz = 1;
553
554 /*
555 * The wireless device HID is basic and layout conflicts with
556 * other tablets (monitor and touch interface can look like pen).
557 * Skip the query for this type and modify defaults based on
558 * interface number.
559 */
560 if (features->type == WIRELESS) {
561 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
562 features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
563 else
564 features->device_type = WACOM_DEVICETYPE_NONE;
565 return;
566 }
567
568 wacom_parse_hid(hdev, features);
569 }
570
571 struct wacom_hdev_data {
572 struct list_head list;
573 struct kref kref;
574 struct hid_device *dev;
575 struct wacom_shared shared;
576 };
577
578 static LIST_HEAD(wacom_udev_list);
579 static DEFINE_MUTEX(wacom_udev_list_lock);
580
581 static bool compare_device_paths(struct hid_device *hdev_a,
582 struct hid_device *hdev_b, char separator)
583 {
584 int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
585 int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
586
587 if (n1 != n2 || n1 <= 0 || n2 <= 0)
588 return false;
589
590 return !strncmp(hdev_a->phys, hdev_b->phys, n1);
591 }
592
593 static bool wacom_are_sibling(struct hid_device *hdev,
594 struct hid_device *sibling)
595 {
596 struct wacom *wacom = hid_get_drvdata(hdev);
597 struct wacom_features *features = &wacom->wacom_wac.features;
598 struct wacom *sibling_wacom = hid_get_drvdata(sibling);
599 struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
600 __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
601 __u32 oPid = features->oPid ? features->oPid : hdev->product;
602
603 /* The defined oVid/oPid must match that of the sibling */
604 if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
605 return false;
606 if (features->oPid != HID_ANY_ID && sibling->product != oPid)
607 return false;
608
609 /*
610 * Devices with the same VID/PID must share the same physical
611 * device path, while those with different VID/PID must share
612 * the same physical parent device path.
613 */
614 if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
615 if (!compare_device_paths(hdev, sibling, '/'))
616 return false;
617 } else {
618 if (!compare_device_paths(hdev, sibling, '.'))
619 return false;
620 }
621
622 /* Skip the remaining heuristics unless you are a HID_GENERIC device */
623 if (features->type != HID_GENERIC)
624 return true;
625
626 /*
627 * Direct-input devices may not be siblings of indirect-input
628 * devices.
629 */
630 if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
631 !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
632 return false;
633
634 /*
635 * Indirect-input devices may not be siblings of direct-input
636 * devices.
637 */
638 if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
639 (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
640 return false;
641
642 /* Pen devices may only be siblings of touch devices */
643 if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
644 !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
645 return false;
646
647 /* Touch devices may only be siblings of pen devices */
648 if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
649 !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
650 return false;
651
652 /*
653 * No reason could be found for these two devices to NOT be
654 * siblings, so there's a good chance they ARE siblings
655 */
656 return true;
657 }
658
659 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
660 {
661 struct wacom_hdev_data *data;
662
663 /* Try to find an already-probed interface from the same device */
664 list_for_each_entry(data, &wacom_udev_list, list) {
665 if (compare_device_paths(hdev, data->dev, '/'))
666 return data;
667 }
668
669 /* Fallback to finding devices that appear to be "siblings" */
670 list_for_each_entry(data, &wacom_udev_list, list) {
671 if (wacom_are_sibling(hdev, data->dev)) {
672 kref_get(&data->kref);
673 return data;
674 }
675 }
676
677 return NULL;
678 }
679
680 static void wacom_release_shared_data(struct kref *kref)
681 {
682 struct wacom_hdev_data *data =
683 container_of(kref, struct wacom_hdev_data, kref);
684
685 mutex_lock(&wacom_udev_list_lock);
686 list_del(&data->list);
687 mutex_unlock(&wacom_udev_list_lock);
688
689 kfree(data);
690 }
691
692 static void wacom_remove_shared_data(void *res)
693 {
694 struct wacom *wacom = res;
695 struct wacom_hdev_data *data;
696 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
697
698 if (wacom_wac->shared) {
699 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
700 shared);
701
702 if (wacom_wac->shared->touch == wacom->hdev)
703 wacom_wac->shared->touch = NULL;
704 else if (wacom_wac->shared->pen == wacom->hdev)
705 wacom_wac->shared->pen = NULL;
706
707 kref_put(&data->kref, wacom_release_shared_data);
708 wacom_wac->shared = NULL;
709 }
710 }
711
712 static int wacom_add_shared_data(struct hid_device *hdev)
713 {
714 struct wacom *wacom = hid_get_drvdata(hdev);
715 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
716 struct wacom_hdev_data *data;
717 int retval = 0;
718
719 mutex_lock(&wacom_udev_list_lock);
720
721 data = wacom_get_hdev_data(hdev);
722 if (!data) {
723 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
724 if (!data) {
725 retval = -ENOMEM;
726 goto out;
727 }
728
729 kref_init(&data->kref);
730 data->dev = hdev;
731 list_add_tail(&data->list, &wacom_udev_list);
732 }
733
734 wacom_wac->shared = &data->shared;
735
736 retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
737 if (retval) {
738 mutex_unlock(&wacom_udev_list_lock);
739 wacom_remove_shared_data(wacom);
740 return retval;
741 }
742
743 out:
744 mutex_unlock(&wacom_udev_list_lock);
745 return retval;
746 }
747
748 static int wacom_led_control(struct wacom *wacom)
749 {
750 unsigned char *buf;
751 int retval;
752 unsigned char report_id = WAC_CMD_LED_CONTROL;
753 int buf_size = 9;
754
755 if (!hid_get_drvdata(wacom->hdev))
756 return -ENODEV;
757
758 if (!wacom->led.groups)
759 return -ENOTSUPP;
760
761 if (wacom->wacom_wac.pid) { /* wireless connected */
762 report_id = WAC_CMD_WL_LED_CONTROL;
763 buf_size = 13;
764 }
765 buf = kzalloc(buf_size, GFP_KERNEL);
766 if (!buf)
767 return -ENOMEM;
768
769 if (wacom->wacom_wac.features.type >= INTUOS5S &&
770 wacom->wacom_wac.features.type <= INTUOSPL) {
771 /*
772 * Touch Ring and crop mark LED luminance may take on
773 * one of four values:
774 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
775 */
776 int ring_led = wacom->led.groups[0].select & 0x03;
777 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
778 int crop_lum = 0;
779 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
780
781 buf[0] = report_id;
782 if (wacom->wacom_wac.pid) {
783 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
784 buf, buf_size, WAC_CMD_RETRIES);
785 buf[0] = report_id;
786 buf[4] = led_bits;
787 } else
788 buf[1] = led_bits;
789 }
790 else {
791 int led = wacom->led.groups[0].select | 0x4;
792
793 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
794 wacom->wacom_wac.features.type == WACOM_24HD)
795 led |= (wacom->led.groups[1].select << 4) | 0x40;
796
797 buf[0] = report_id;
798 buf[1] = led;
799 buf[2] = wacom->led.llv;
800 buf[3] = wacom->led.hlv;
801 buf[4] = wacom->led.img_lum;
802 }
803
804 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
805 WAC_CMD_RETRIES);
806 kfree(buf);
807
808 return retval;
809 }
810
811 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
812 const unsigned len, const void *img)
813 {
814 unsigned char *buf;
815 int i, retval;
816 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
817
818 buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
819 if (!buf)
820 return -ENOMEM;
821
822 /* Send 'start' command */
823 buf[0] = WAC_CMD_ICON_START;
824 buf[1] = 1;
825 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
826 WAC_CMD_RETRIES);
827 if (retval < 0)
828 goto out;
829
830 buf[0] = xfer_id;
831 buf[1] = button_id & 0x07;
832 for (i = 0; i < 4; i++) {
833 buf[2] = i;
834 memcpy(buf + 3, img + i * chunk_len, chunk_len);
835
836 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
837 buf, chunk_len + 3, WAC_CMD_RETRIES);
838 if (retval < 0)
839 break;
840 }
841
842 /* Send 'stop' */
843 buf[0] = WAC_CMD_ICON_START;
844 buf[1] = 0;
845 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
846 WAC_CMD_RETRIES);
847
848 out:
849 kfree(buf);
850 return retval;
851 }
852
853 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
854 const char *buf, size_t count)
855 {
856 struct hid_device *hdev = to_hid_device(dev);
857 struct wacom *wacom = hid_get_drvdata(hdev);
858 unsigned int id;
859 int err;
860
861 err = kstrtouint(buf, 10, &id);
862 if (err)
863 return err;
864
865 mutex_lock(&wacom->lock);
866
867 wacom->led.groups[set_id].select = id & 0x3;
868 err = wacom_led_control(wacom);
869
870 mutex_unlock(&wacom->lock);
871
872 return err < 0 ? err : count;
873 }
874
875 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
876 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
877 struct device_attribute *attr, const char *buf, size_t count) \
878 { \
879 return wacom_led_select_store(dev, SET_ID, buf, count); \
880 } \
881 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
882 struct device_attribute *attr, char *buf) \
883 { \
884 struct hid_device *hdev = to_hid_device(dev);\
885 struct wacom *wacom = hid_get_drvdata(hdev); \
886 return scnprintf(buf, PAGE_SIZE, "%d\n", \
887 wacom->led.groups[SET_ID].select); \
888 } \
889 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \
890 wacom_led##SET_ID##_select_show, \
891 wacom_led##SET_ID##_select_store)
892
893 DEVICE_LED_SELECT_ATTR(0);
894 DEVICE_LED_SELECT_ATTR(1);
895
896 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
897 const char *buf, size_t count)
898 {
899 unsigned int value;
900 int err;
901
902 err = kstrtouint(buf, 10, &value);
903 if (err)
904 return err;
905
906 mutex_lock(&wacom->lock);
907
908 *dest = value & 0x7f;
909 err = wacom_led_control(wacom);
910
911 mutex_unlock(&wacom->lock);
912
913 return err < 0 ? err : count;
914 }
915
916 #define DEVICE_LUMINANCE_ATTR(name, field) \
917 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
918 struct device_attribute *attr, const char *buf, size_t count) \
919 { \
920 struct hid_device *hdev = to_hid_device(dev);\
921 struct wacom *wacom = hid_get_drvdata(hdev); \
922 \
923 return wacom_luminance_store(wacom, &wacom->led.field, \
924 buf, count); \
925 } \
926 static ssize_t wacom_##name##_luminance_show(struct device *dev, \
927 struct device_attribute *attr, char *buf) \
928 { \
929 struct wacom *wacom = dev_get_drvdata(dev); \
930 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \
931 } \
932 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \
933 wacom_##name##_luminance_show, \
934 wacom_##name##_luminance_store)
935
936 DEVICE_LUMINANCE_ATTR(status0, llv);
937 DEVICE_LUMINANCE_ATTR(status1, hlv);
938 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
939
940 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
941 const char *buf, size_t count)
942 {
943 struct hid_device *hdev = to_hid_device(dev);
944 struct wacom *wacom = hid_get_drvdata(hdev);
945 int err;
946 unsigned len;
947 u8 xfer_id;
948
949 if (hdev->bus == BUS_BLUETOOTH) {
950 len = 256;
951 xfer_id = WAC_CMD_ICON_BT_XFER;
952 } else {
953 len = 1024;
954 xfer_id = WAC_CMD_ICON_XFER;
955 }
956
957 if (count != len)
958 return -EINVAL;
959
960 mutex_lock(&wacom->lock);
961
962 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
963
964 mutex_unlock(&wacom->lock);
965
966 return err < 0 ? err : count;
967 }
968
969 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
970 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
971 struct device_attribute *attr, const char *buf, size_t count) \
972 { \
973 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
974 } \
975 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \
976 NULL, wacom_btnimg##BUTTON_ID##_store)
977
978 DEVICE_BTNIMG_ATTR(0);
979 DEVICE_BTNIMG_ATTR(1);
980 DEVICE_BTNIMG_ATTR(2);
981 DEVICE_BTNIMG_ATTR(3);
982 DEVICE_BTNIMG_ATTR(4);
983 DEVICE_BTNIMG_ATTR(5);
984 DEVICE_BTNIMG_ATTR(6);
985 DEVICE_BTNIMG_ATTR(7);
986
987 static struct attribute *cintiq_led_attrs[] = {
988 &dev_attr_status_led0_select.attr,
989 &dev_attr_status_led1_select.attr,
990 NULL
991 };
992
993 static struct attribute_group cintiq_led_attr_group = {
994 .name = "wacom_led",
995 .attrs = cintiq_led_attrs,
996 };
997
998 static struct attribute *intuos4_led_attrs[] = {
999 &dev_attr_status0_luminance.attr,
1000 &dev_attr_status1_luminance.attr,
1001 &dev_attr_status_led0_select.attr,
1002 &dev_attr_buttons_luminance.attr,
1003 &dev_attr_button0_rawimg.attr,
1004 &dev_attr_button1_rawimg.attr,
1005 &dev_attr_button2_rawimg.attr,
1006 &dev_attr_button3_rawimg.attr,
1007 &dev_attr_button4_rawimg.attr,
1008 &dev_attr_button5_rawimg.attr,
1009 &dev_attr_button6_rawimg.attr,
1010 &dev_attr_button7_rawimg.attr,
1011 NULL
1012 };
1013
1014 static struct attribute_group intuos4_led_attr_group = {
1015 .name = "wacom_led",
1016 .attrs = intuos4_led_attrs,
1017 };
1018
1019 static struct attribute *intuos5_led_attrs[] = {
1020 &dev_attr_status0_luminance.attr,
1021 &dev_attr_status_led0_select.attr,
1022 NULL
1023 };
1024
1025 static struct attribute_group intuos5_led_attr_group = {
1026 .name = "wacom_led",
1027 .attrs = intuos5_led_attrs,
1028 };
1029
1030 struct wacom_sysfs_group_devres {
1031 struct attribute_group *group;
1032 struct kobject *root;
1033 };
1034
1035 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1036 {
1037 struct wacom_sysfs_group_devres *devres = res;
1038 struct kobject *kobj = devres->root;
1039
1040 dev_dbg(dev, "%s: dropping reference to %s\n",
1041 __func__, devres->group->name);
1042 sysfs_remove_group(kobj, devres->group);
1043 }
1044
1045 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1046 struct kobject *root,
1047 struct attribute_group *group)
1048 {
1049 struct wacom_sysfs_group_devres *devres;
1050 int error;
1051
1052 devres = devres_alloc(wacom_devm_sysfs_group_release,
1053 sizeof(struct wacom_sysfs_group_devres),
1054 GFP_KERNEL);
1055 if (!devres)
1056 return -ENOMEM;
1057
1058 devres->group = group;
1059 devres->root = root;
1060
1061 error = sysfs_create_group(devres->root, group);
1062 if (error)
1063 return error;
1064
1065 devres_add(&wacom->hdev->dev, devres);
1066
1067 return 0;
1068 }
1069
1070 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1071 struct attribute_group *group)
1072 {
1073 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1074 group);
1075 }
1076
1077 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1078 {
1079 struct wacom *wacom = led->wacom;
1080
1081 if (wacom->led.max_hlv)
1082 return led->hlv * LED_FULL / wacom->led.max_hlv;
1083
1084 if (wacom->led.max_llv)
1085 return led->llv * LED_FULL / wacom->led.max_llv;
1086
1087 /* device doesn't support brightness tuning */
1088 return LED_FULL;
1089 }
1090
1091 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1092 {
1093 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1094 struct wacom *wacom = led->wacom;
1095
1096 if (wacom->led.groups[led->group].select != led->id)
1097 return LED_OFF;
1098
1099 return wacom_leds_brightness_get(led);
1100 }
1101
1102 static int wacom_led_brightness_set(struct led_classdev *cdev,
1103 enum led_brightness brightness)
1104 {
1105 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1106 struct wacom *wacom = led->wacom;
1107 int error;
1108
1109 mutex_lock(&wacom->lock);
1110
1111 if (!wacom->led.groups || (brightness == LED_OFF &&
1112 wacom->led.groups[led->group].select != led->id)) {
1113 error = 0;
1114 goto out;
1115 }
1116
1117 led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1118 led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1119
1120 wacom->led.groups[led->group].select = led->id;
1121
1122 error = wacom_led_control(wacom);
1123
1124 out:
1125 mutex_unlock(&wacom->lock);
1126
1127 return error;
1128 }
1129
1130 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1131 enum led_brightness brightness)
1132 {
1133 }
1134
1135 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1136 struct wacom_led *led, unsigned int group,
1137 unsigned int id, bool read_only)
1138 {
1139 int error;
1140 char *name;
1141
1142 name = devm_kasprintf(dev, GFP_KERNEL,
1143 "%s::wacom-%d.%d",
1144 dev_name(dev),
1145 group,
1146 id);
1147 if (!name)
1148 return -ENOMEM;
1149
1150 if (!read_only) {
1151 led->trigger.name = name;
1152 error = devm_led_trigger_register(dev, &led->trigger);
1153 if (error) {
1154 hid_err(wacom->hdev,
1155 "failed to register LED trigger %s: %d\n",
1156 led->cdev.name, error);
1157 return error;
1158 }
1159 }
1160
1161 led->group = group;
1162 led->id = id;
1163 led->wacom = wacom;
1164 led->llv = wacom->led.llv;
1165 led->hlv = wacom->led.hlv;
1166 led->cdev.name = name;
1167 led->cdev.max_brightness = LED_FULL;
1168 led->cdev.flags = LED_HW_PLUGGABLE;
1169 led->cdev.brightness_get = __wacom_led_brightness_get;
1170 if (!read_only) {
1171 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1172 led->cdev.default_trigger = led->cdev.name;
1173 } else {
1174 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1175 }
1176
1177 error = devm_led_classdev_register(dev, &led->cdev);
1178 if (error) {
1179 hid_err(wacom->hdev,
1180 "failed to register LED %s: %d\n",
1181 led->cdev.name, error);
1182 led->cdev.name = NULL;
1183 return error;
1184 }
1185
1186 return 0;
1187 }
1188
1189 static void wacom_led_groups_release_one(void *data)
1190 {
1191 struct wacom_group_leds *group = data;
1192
1193 devres_release_group(group->dev, group);
1194 }
1195
1196 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1197 struct wacom *wacom,
1198 int group_id, int count,
1199 bool read_only)
1200 {
1201 struct wacom_led *leds;
1202 int i, error;
1203
1204 if (group_id >= wacom->led.count || count <= 0)
1205 return -EINVAL;
1206
1207 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1208 return -ENOMEM;
1209
1210 leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL);
1211 if (!leds) {
1212 error = -ENOMEM;
1213 goto err;
1214 }
1215
1216 wacom->led.groups[group_id].leds = leds;
1217 wacom->led.groups[group_id].count = count;
1218
1219 for (i = 0; i < count; i++) {
1220 error = wacom_led_register_one(dev, wacom, &leds[i],
1221 group_id, i, read_only);
1222 if (error)
1223 goto err;
1224 }
1225
1226 wacom->led.groups[group_id].dev = dev;
1227
1228 devres_close_group(dev, &wacom->led.groups[group_id]);
1229
1230 /*
1231 * There is a bug (?) in devm_led_classdev_register() in which its
1232 * increments the refcount of the parent. If the parent is an input
1233 * device, that means the ref count never reaches 0 when
1234 * devm_input_device_release() gets called.
1235 * This means that the LEDs are still there after disconnect.
1236 * Manually force the release of the group so that the leds are released
1237 * once we are done using them.
1238 */
1239 error = devm_add_action_or_reset(&wacom->hdev->dev,
1240 wacom_led_groups_release_one,
1241 &wacom->led.groups[group_id]);
1242 if (error)
1243 return error;
1244
1245 return 0;
1246
1247 err:
1248 devres_release_group(dev, &wacom->led.groups[group_id]);
1249 return error;
1250 }
1251
1252 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1253 unsigned int id)
1254 {
1255 struct wacom_group_leds *group;
1256
1257 if (group_id >= wacom->led.count)
1258 return NULL;
1259
1260 group = &wacom->led.groups[group_id];
1261
1262 if (!group->leds)
1263 return NULL;
1264
1265 id %= group->count;
1266
1267 return &group->leds[id];
1268 }
1269
1270 /**
1271 * wacom_led_next: gives the next available led with a wacom trigger.
1272 *
1273 * returns the next available struct wacom_led which has its default trigger
1274 * or the current one if none is available.
1275 */
1276 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1277 {
1278 struct wacom_led *next_led;
1279 int group, next;
1280
1281 if (!wacom || !cur)
1282 return NULL;
1283
1284 group = cur->group;
1285 next = cur->id;
1286
1287 do {
1288 next_led = wacom_led_find(wacom, group, ++next);
1289 if (!next_led || next_led == cur)
1290 return next_led;
1291 } while (next_led->cdev.trigger != &next_led->trigger);
1292
1293 return next_led;
1294 }
1295
1296 static void wacom_led_groups_release(void *data)
1297 {
1298 struct wacom *wacom = data;
1299
1300 wacom->led.groups = NULL;
1301 wacom->led.count = 0;
1302 }
1303
1304 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1305 {
1306 struct device *dev = &wacom->hdev->dev;
1307 struct wacom_group_leds *groups;
1308 int error;
1309
1310 groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
1311 GFP_KERNEL);
1312 if (!groups)
1313 return -ENOMEM;
1314
1315 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1316 if (error)
1317 return error;
1318
1319 wacom->led.groups = groups;
1320 wacom->led.count = count;
1321
1322 return 0;
1323 }
1324
1325 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1326 int led_per_group, bool read_only)
1327 {
1328 struct device *dev;
1329 int i, error;
1330
1331 if (!wacom->wacom_wac.pad_input)
1332 return -EINVAL;
1333
1334 dev = &wacom->wacom_wac.pad_input->dev;
1335
1336 error = wacom_led_groups_allocate(wacom, group_count);
1337 if (error)
1338 return error;
1339
1340 for (i = 0; i < group_count; i++) {
1341 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1342 led_per_group,
1343 read_only);
1344 if (error)
1345 return error;
1346 }
1347
1348 return 0;
1349 }
1350
1351 static int wacom_initialize_leds(struct wacom *wacom)
1352 {
1353 int error;
1354
1355 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1356 return 0;
1357
1358 /* Initialize default values */
1359 switch (wacom->wacom_wac.features.type) {
1360 case INTUOS4S:
1361 case INTUOS4:
1362 case INTUOS4WL:
1363 case INTUOS4L:
1364 wacom->led.llv = 10;
1365 wacom->led.hlv = 20;
1366 wacom->led.max_llv = 127;
1367 wacom->led.max_hlv = 127;
1368 wacom->led.img_lum = 10;
1369
1370 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1371 if (error) {
1372 hid_err(wacom->hdev,
1373 "cannot create leds err: %d\n", error);
1374 return error;
1375 }
1376
1377 error = wacom_devm_sysfs_create_group(wacom,
1378 &intuos4_led_attr_group);
1379 break;
1380
1381 case WACOM_24HD:
1382 case WACOM_21UX2:
1383 wacom->led.llv = 0;
1384 wacom->led.hlv = 0;
1385 wacom->led.img_lum = 0;
1386
1387 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1388 if (error) {
1389 hid_err(wacom->hdev,
1390 "cannot create leds err: %d\n", error);
1391 return error;
1392 }
1393
1394 error = wacom_devm_sysfs_create_group(wacom,
1395 &cintiq_led_attr_group);
1396 break;
1397
1398 case INTUOS5S:
1399 case INTUOS5:
1400 case INTUOS5L:
1401 case INTUOSPS:
1402 case INTUOSPM:
1403 case INTUOSPL:
1404 wacom->led.llv = 32;
1405 wacom->led.max_llv = 96;
1406
1407 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1408 if (error) {
1409 hid_err(wacom->hdev,
1410 "cannot create leds err: %d\n", error);
1411 return error;
1412 }
1413
1414 error = wacom_devm_sysfs_create_group(wacom,
1415 &intuos5_led_attr_group);
1416 break;
1417
1418 case REMOTE:
1419 wacom->led.llv = 255;
1420 wacom->led.max_llv = 255;
1421 error = wacom_led_groups_allocate(wacom, 5);
1422 if (error) {
1423 hid_err(wacom->hdev,
1424 "cannot create leds err: %d\n", error);
1425 return error;
1426 }
1427 return 0;
1428
1429 default:
1430 return 0;
1431 }
1432
1433 if (error) {
1434 hid_err(wacom->hdev,
1435 "cannot create sysfs group err: %d\n", error);
1436 return error;
1437 }
1438 wacom_led_control(wacom);
1439
1440 return 0;
1441 }
1442
1443 static enum power_supply_property wacom_battery_props[] = {
1444 POWER_SUPPLY_PROP_MODEL_NAME,
1445 POWER_SUPPLY_PROP_PRESENT,
1446 POWER_SUPPLY_PROP_STATUS,
1447 POWER_SUPPLY_PROP_SCOPE,
1448 POWER_SUPPLY_PROP_CAPACITY
1449 };
1450
1451 static int wacom_battery_get_property(struct power_supply *psy,
1452 enum power_supply_property psp,
1453 union power_supply_propval *val)
1454 {
1455 struct wacom_battery *battery = power_supply_get_drvdata(psy);
1456 int ret = 0;
1457
1458 switch (psp) {
1459 case POWER_SUPPLY_PROP_MODEL_NAME:
1460 val->strval = battery->wacom->wacom_wac.name;
1461 break;
1462 case POWER_SUPPLY_PROP_PRESENT:
1463 val->intval = battery->bat_connected;
1464 break;
1465 case POWER_SUPPLY_PROP_SCOPE:
1466 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1467 break;
1468 case POWER_SUPPLY_PROP_CAPACITY:
1469 val->intval = battery->battery_capacity;
1470 break;
1471 case POWER_SUPPLY_PROP_STATUS:
1472 if (battery->bat_charging)
1473 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1474 else if (battery->battery_capacity == 100 &&
1475 battery->ps_connected)
1476 val->intval = POWER_SUPPLY_STATUS_FULL;
1477 else if (battery->ps_connected)
1478 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1479 else
1480 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1481 break;
1482 default:
1483 ret = -EINVAL;
1484 break;
1485 }
1486
1487 return ret;
1488 }
1489
1490 static int __wacom_initialize_battery(struct wacom *wacom,
1491 struct wacom_battery *battery)
1492 {
1493 static atomic_t battery_no = ATOMIC_INIT(0);
1494 struct device *dev = &wacom->hdev->dev;
1495 struct power_supply_config psy_cfg = { .drv_data = battery, };
1496 struct power_supply *ps_bat;
1497 struct power_supply_desc *bat_desc = &battery->bat_desc;
1498 unsigned long n;
1499 int error;
1500
1501 if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1502 return -ENOMEM;
1503
1504 battery->wacom = wacom;
1505
1506 n = atomic_inc_return(&battery_no) - 1;
1507
1508 bat_desc->properties = wacom_battery_props;
1509 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1510 bat_desc->get_property = wacom_battery_get_property;
1511 sprintf(battery->bat_name, "wacom_battery_%ld", n);
1512 bat_desc->name = battery->bat_name;
1513 bat_desc->type = POWER_SUPPLY_TYPE_USB;
1514 bat_desc->use_for_apm = 0;
1515
1516 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1517 if (IS_ERR(ps_bat)) {
1518 error = PTR_ERR(ps_bat);
1519 goto err;
1520 }
1521
1522 power_supply_powers(ps_bat, &wacom->hdev->dev);
1523
1524 battery->battery = ps_bat;
1525
1526 devres_close_group(dev, bat_desc);
1527 return 0;
1528
1529 err:
1530 devres_release_group(dev, bat_desc);
1531 return error;
1532 }
1533
1534 static int wacom_initialize_battery(struct wacom *wacom)
1535 {
1536 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1537 return __wacom_initialize_battery(wacom, &wacom->battery);
1538
1539 return 0;
1540 }
1541
1542 static void wacom_destroy_battery(struct wacom *wacom)
1543 {
1544 if (wacom->battery.battery) {
1545 devres_release_group(&wacom->hdev->dev,
1546 &wacom->battery.bat_desc);
1547 wacom->battery.battery = NULL;
1548 }
1549 }
1550
1551 static ssize_t wacom_show_speed(struct device *dev,
1552 struct device_attribute
1553 *attr, char *buf)
1554 {
1555 struct hid_device *hdev = to_hid_device(dev);
1556 struct wacom *wacom = hid_get_drvdata(hdev);
1557
1558 return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1559 }
1560
1561 static ssize_t wacom_store_speed(struct device *dev,
1562 struct device_attribute *attr,
1563 const char *buf, size_t count)
1564 {
1565 struct hid_device *hdev = to_hid_device(dev);
1566 struct wacom *wacom = hid_get_drvdata(hdev);
1567 u8 new_speed;
1568
1569 if (kstrtou8(buf, 0, &new_speed))
1570 return -EINVAL;
1571
1572 if (new_speed != 0 && new_speed != 1)
1573 return -EINVAL;
1574
1575 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1576
1577 return count;
1578 }
1579
1580 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1581 wacom_show_speed, wacom_store_speed);
1582
1583
1584 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1585 struct kobj_attribute *kattr,
1586 char *buf, int index)
1587 {
1588 struct device *dev = kobj_to_dev(kobj->parent);
1589 struct hid_device *hdev = to_hid_device(dev);
1590 struct wacom *wacom = hid_get_drvdata(hdev);
1591 u8 mode;
1592
1593 mode = wacom->led.groups[index].select;
1594 if (mode >= 0 && mode < 3)
1595 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
1596 else
1597 return snprintf(buf, PAGE_SIZE, "%d\n", -1);
1598 }
1599
1600 #define DEVICE_EKR_ATTR_GROUP(SET_ID) \
1601 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \
1602 struct kobj_attribute *kattr, char *buf) \
1603 { \
1604 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \
1605 } \
1606 static struct kobj_attribute remote##SET_ID##_mode_attr = { \
1607 .attr = {.name = "remote_mode", \
1608 .mode = DEV_ATTR_RO_PERM}, \
1609 .show = wacom_show_remote##SET_ID##_mode, \
1610 }; \
1611 static struct attribute *remote##SET_ID##_serial_attrs[] = { \
1612 &remote##SET_ID##_mode_attr.attr, \
1613 NULL \
1614 }; \
1615 static struct attribute_group remote##SET_ID##_serial_group = { \
1616 .name = NULL, \
1617 .attrs = remote##SET_ID##_serial_attrs, \
1618 }
1619
1620 DEVICE_EKR_ATTR_GROUP(0);
1621 DEVICE_EKR_ATTR_GROUP(1);
1622 DEVICE_EKR_ATTR_GROUP(2);
1623 DEVICE_EKR_ATTR_GROUP(3);
1624 DEVICE_EKR_ATTR_GROUP(4);
1625
1626 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1627 int index)
1628 {
1629 int error = 0;
1630 struct wacom_remote *remote = wacom->remote;
1631
1632 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1633 GFP_KERNEL,
1634 "%d", serial);
1635 if (!remote->remotes[index].group.name)
1636 return -ENOMEM;
1637
1638 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1639 &remote->remotes[index].group);
1640 if (error) {
1641 remote->remotes[index].group.name = NULL;
1642 hid_err(wacom->hdev,
1643 "cannot create sysfs group err: %d\n", error);
1644 return error;
1645 }
1646
1647 return 0;
1648 }
1649
1650 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1651 {
1652 const size_t buf_size = 2;
1653 unsigned char *buf;
1654 int retval;
1655
1656 buf = kzalloc(buf_size, GFP_KERNEL);
1657 if (!buf)
1658 return -ENOMEM;
1659
1660 buf[0] = WAC_CMD_DELETE_PAIRING;
1661 buf[1] = selector;
1662
1663 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1664 buf_size, WAC_CMD_RETRIES);
1665 kfree(buf);
1666
1667 return retval;
1668 }
1669
1670 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1671 struct kobj_attribute *attr,
1672 const char *buf, size_t count)
1673 {
1674 unsigned char selector = 0;
1675 struct device *dev = kobj_to_dev(kobj->parent);
1676 struct hid_device *hdev = to_hid_device(dev);
1677 struct wacom *wacom = hid_get_drvdata(hdev);
1678 int err;
1679
1680 if (!strncmp(buf, "*\n", 2)) {
1681 selector = WAC_CMD_UNPAIR_ALL;
1682 } else {
1683 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1684 buf);
1685 return -1;
1686 }
1687
1688 mutex_lock(&wacom->lock);
1689
1690 err = wacom_cmd_unpair_remote(wacom, selector);
1691 mutex_unlock(&wacom->lock);
1692
1693 return err < 0 ? err : count;
1694 }
1695
1696 static struct kobj_attribute unpair_remote_attr = {
1697 .attr = {.name = "unpair_remote", .mode = 0200},
1698 .store = wacom_store_unpair_remote,
1699 };
1700
1701 static const struct attribute *remote_unpair_attrs[] = {
1702 &unpair_remote_attr.attr,
1703 NULL
1704 };
1705
1706 static void wacom_remotes_destroy(void *data)
1707 {
1708 struct wacom *wacom = data;
1709 struct wacom_remote *remote = wacom->remote;
1710
1711 if (!remote)
1712 return;
1713
1714 kobject_put(remote->remote_dir);
1715 kfifo_free(&remote->remote_fifo);
1716 wacom->remote = NULL;
1717 }
1718
1719 static int wacom_initialize_remotes(struct wacom *wacom)
1720 {
1721 int error = 0;
1722 struct wacom_remote *remote;
1723 int i;
1724
1725 if (wacom->wacom_wac.features.type != REMOTE)
1726 return 0;
1727
1728 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1729 GFP_KERNEL);
1730 if (!remote)
1731 return -ENOMEM;
1732
1733 wacom->remote = remote;
1734
1735 spin_lock_init(&remote->remote_lock);
1736
1737 error = kfifo_alloc(&remote->remote_fifo,
1738 5 * sizeof(struct wacom_remote_data),
1739 GFP_KERNEL);
1740 if (error) {
1741 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1742 return -ENOMEM;
1743 }
1744
1745 remote->remotes[0].group = remote0_serial_group;
1746 remote->remotes[1].group = remote1_serial_group;
1747 remote->remotes[2].group = remote2_serial_group;
1748 remote->remotes[3].group = remote3_serial_group;
1749 remote->remotes[4].group = remote4_serial_group;
1750
1751 remote->remote_dir = kobject_create_and_add("wacom_remote",
1752 &wacom->hdev->dev.kobj);
1753 if (!remote->remote_dir)
1754 return -ENOMEM;
1755
1756 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1757
1758 if (error) {
1759 hid_err(wacom->hdev,
1760 "cannot create sysfs group err: %d\n", error);
1761 return error;
1762 }
1763
1764 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1765 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1766 remote->remotes[i].serial = 0;
1767 }
1768
1769 error = devm_add_action_or_reset(&wacom->hdev->dev,
1770 wacom_remotes_destroy, wacom);
1771 if (error)
1772 return error;
1773
1774 return 0;
1775 }
1776
1777 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1778 {
1779 struct input_dev *input_dev;
1780 struct hid_device *hdev = wacom->hdev;
1781 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1782
1783 input_dev = devm_input_allocate_device(&hdev->dev);
1784 if (!input_dev)
1785 return NULL;
1786
1787 input_dev->name = wacom_wac->features.name;
1788 input_dev->phys = hdev->phys;
1789 input_dev->dev.parent = &hdev->dev;
1790 input_dev->open = wacom_open;
1791 input_dev->close = wacom_close;
1792 input_dev->uniq = hdev->uniq;
1793 input_dev->id.bustype = hdev->bus;
1794 input_dev->id.vendor = hdev->vendor;
1795 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1796 input_dev->id.version = hdev->version;
1797 input_set_drvdata(input_dev, wacom);
1798
1799 return input_dev;
1800 }
1801
1802 static int wacom_allocate_inputs(struct wacom *wacom)
1803 {
1804 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1805
1806 wacom_wac->pen_input = wacom_allocate_input(wacom);
1807 wacom_wac->touch_input = wacom_allocate_input(wacom);
1808 wacom_wac->pad_input = wacom_allocate_input(wacom);
1809 if (!wacom_wac->pen_input ||
1810 !wacom_wac->touch_input ||
1811 !wacom_wac->pad_input)
1812 return -ENOMEM;
1813
1814 wacom_wac->pen_input->name = wacom_wac->pen_name;
1815 wacom_wac->touch_input->name = wacom_wac->touch_name;
1816 wacom_wac->pad_input->name = wacom_wac->pad_name;
1817
1818 return 0;
1819 }
1820
1821 static int wacom_register_inputs(struct wacom *wacom)
1822 {
1823 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1824 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1825 int error = 0;
1826
1827 pen_input_dev = wacom_wac->pen_input;
1828 touch_input_dev = wacom_wac->touch_input;
1829 pad_input_dev = wacom_wac->pad_input;
1830
1831 if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1832 return -EINVAL;
1833
1834 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1835 if (error) {
1836 /* no pen in use on this interface */
1837 input_free_device(pen_input_dev);
1838 wacom_wac->pen_input = NULL;
1839 pen_input_dev = NULL;
1840 } else {
1841 error = input_register_device(pen_input_dev);
1842 if (error)
1843 goto fail;
1844 }
1845
1846 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1847 if (error) {
1848 /* no touch in use on this interface */
1849 input_free_device(touch_input_dev);
1850 wacom_wac->touch_input = NULL;
1851 touch_input_dev = NULL;
1852 } else {
1853 error = input_register_device(touch_input_dev);
1854 if (error)
1855 goto fail;
1856 }
1857
1858 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1859 if (error) {
1860 /* no pad in use on this interface */
1861 input_free_device(pad_input_dev);
1862 wacom_wac->pad_input = NULL;
1863 pad_input_dev = NULL;
1864 } else {
1865 error = input_register_device(pad_input_dev);
1866 if (error)
1867 goto fail;
1868 }
1869
1870 return 0;
1871
1872 fail:
1873 wacom_wac->pad_input = NULL;
1874 wacom_wac->touch_input = NULL;
1875 wacom_wac->pen_input = NULL;
1876 return error;
1877 }
1878
1879 /*
1880 * Not all devices report physical dimensions from HID.
1881 * Compute the default from hardcoded logical dimension
1882 * and resolution before driver overwrites them.
1883 */
1884 static void wacom_set_default_phy(struct wacom_features *features)
1885 {
1886 if (features->x_resolution) {
1887 features->x_phy = (features->x_max * 100) /
1888 features->x_resolution;
1889 features->y_phy = (features->y_max * 100) /
1890 features->y_resolution;
1891 }
1892 }
1893
1894 static void wacom_calculate_res(struct wacom_features *features)
1895 {
1896 /* set unit to "100th of a mm" for devices not reported by HID */
1897 if (!features->unit) {
1898 features->unit = 0x11;
1899 features->unitExpo = -3;
1900 }
1901
1902 features->x_resolution = wacom_calc_hid_res(features->x_max,
1903 features->x_phy,
1904 features->unit,
1905 features->unitExpo);
1906 features->y_resolution = wacom_calc_hid_res(features->y_max,
1907 features->y_phy,
1908 features->unit,
1909 features->unitExpo);
1910 }
1911
1912 void wacom_battery_work(struct work_struct *work)
1913 {
1914 struct wacom *wacom = container_of(work, struct wacom, battery_work);
1915
1916 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1917 !wacom->battery.battery) {
1918 wacom_initialize_battery(wacom);
1919 }
1920 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1921 wacom->battery.battery) {
1922 wacom_destroy_battery(wacom);
1923 }
1924 }
1925
1926 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1927 {
1928 struct hid_report_enum *report_enum;
1929 struct hid_report *report;
1930 size_t size = 0;
1931
1932 report_enum = hdev->report_enum + HID_INPUT_REPORT;
1933
1934 list_for_each_entry(report, &report_enum->report_list, list) {
1935 size_t report_size = hid_report_len(report);
1936 if (report_size > size)
1937 size = report_size;
1938 }
1939
1940 return size;
1941 }
1942
1943 static void wacom_update_name(struct wacom *wacom, const char *suffix)
1944 {
1945 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1946 struct wacom_features *features = &wacom_wac->features;
1947 char name[WACOM_NAME_MAX];
1948
1949 /* Generic devices name unspecified */
1950 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
1951 if (strstr(wacom->hdev->name, "Wacom") ||
1952 strstr(wacom->hdev->name, "wacom") ||
1953 strstr(wacom->hdev->name, "WACOM")) {
1954 /* name is in HID descriptor, use it */
1955 strlcpy(name, wacom->hdev->name, sizeof(name));
1956
1957 /* strip out excess whitespaces */
1958 while (1) {
1959 char *gap = strstr(name, " ");
1960 if (gap == NULL)
1961 break;
1962 /* shift everything including the terminator */
1963 memmove(gap, gap+1, strlen(gap));
1964 }
1965
1966 /* strip off excessive prefixing */
1967 if (strstr(name, "Wacom Co.,Ltd. Wacom ") == name) {
1968 int n = strlen(name);
1969 int x = strlen("Wacom Co.,Ltd. ");
1970 memmove(name, name+x, n-x+1);
1971 }
1972 if (strstr(name, "Wacom Co., Ltd. Wacom ") == name) {
1973 int n = strlen(name);
1974 int x = strlen("Wacom Co., Ltd. ");
1975 memmove(name, name+x, n-x+1);
1976 }
1977
1978 /* get rid of trailing whitespace */
1979 if (name[strlen(name)-1] == ' ')
1980 name[strlen(name)-1] = '\0';
1981 } else {
1982 /* no meaningful name retrieved. use product ID */
1983 snprintf(name, sizeof(name),
1984 "%s %X", features->name, wacom->hdev->product);
1985 }
1986 } else {
1987 strlcpy(name, features->name, sizeof(name));
1988 }
1989
1990 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
1991 name, suffix);
1992
1993 /* Append the device type to the name */
1994 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
1995 "%s%s Pen", name, suffix);
1996 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
1997 "%s%s Finger", name, suffix);
1998 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1999 "%s%s Pad", name, suffix);
2000 }
2001
2002 static void wacom_release_resources(struct wacom *wacom)
2003 {
2004 struct hid_device *hdev = wacom->hdev;
2005
2006 if (!wacom->resources)
2007 return;
2008
2009 devres_release_group(&hdev->dev, wacom);
2010
2011 wacom->resources = false;
2012
2013 wacom->wacom_wac.pen_input = NULL;
2014 wacom->wacom_wac.touch_input = NULL;
2015 wacom->wacom_wac.pad_input = NULL;
2016 }
2017
2018 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2019 {
2020 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2021 struct wacom_features *features = &wacom_wac->features;
2022 struct hid_device *hdev = wacom->hdev;
2023 int error;
2024 unsigned int connect_mask = HID_CONNECT_HIDRAW;
2025
2026 features->pktlen = wacom_compute_pktlen(hdev);
2027 if (features->pktlen > WACOM_PKGLEN_MAX)
2028 return -EINVAL;
2029
2030 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2031 return -ENOMEM;
2032
2033 wacom->resources = true;
2034
2035 error = wacom_allocate_inputs(wacom);
2036 if (error)
2037 goto fail;
2038
2039 error = wacom_add_shared_data(hdev);
2040 if (error)
2041 goto fail;
2042
2043 /*
2044 * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2045 * into debug mode for the touch part.
2046 * We ignore the other interfaces.
2047 */
2048 if (features->type == BAMBOO_PAD) {
2049 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2050 features->type = HID_GENERIC;
2051 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2052 (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2053 error = -ENODEV;
2054 goto fail;
2055 }
2056 }
2057
2058 /* set the default size in case we do not get them from hid */
2059 wacom_set_default_phy(features);
2060
2061 /* Retrieve the physical and logical size for touch devices */
2062 wacom_retrieve_hid_descriptor(hdev, features);
2063 wacom_setup_device_quirks(wacom);
2064
2065 if (features->device_type == WACOM_DEVICETYPE_NONE &&
2066 features->type != WIRELESS) {
2067 error = features->type == HID_GENERIC ? -ENODEV : 0;
2068
2069 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2070 hdev->name,
2071 error ? "Ignoring" : "Assuming pen");
2072
2073 if (error)
2074 goto fail;
2075
2076 features->device_type |= WACOM_DEVICETYPE_PEN;
2077 }
2078
2079 wacom_calculate_res(features);
2080
2081 wacom_update_name(wacom, wireless ? " (WL)" : "");
2082
2083 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
2084 wacom_wac->shared->touch = hdev;
2085 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
2086 wacom_wac->shared->pen = hdev;
2087
2088 if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2089 (features->quirks & WACOM_QUIRK_BATTERY)) {
2090 error = wacom_initialize_battery(wacom);
2091 if (error)
2092 goto fail;
2093 }
2094
2095 error = wacom_register_inputs(wacom);
2096 if (error)
2097 goto fail;
2098
2099 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2100 error = wacom_initialize_leds(wacom);
2101 if (error)
2102 goto fail;
2103
2104 error = wacom_initialize_remotes(wacom);
2105 if (error)
2106 goto fail;
2107 }
2108
2109 if (features->type == HID_GENERIC)
2110 connect_mask |= HID_CONNECT_DRIVER;
2111
2112 /* Regular HID work starts now */
2113 error = hid_hw_start(hdev, connect_mask);
2114 if (error) {
2115 hid_err(hdev, "hw start failed\n");
2116 goto fail;
2117 }
2118
2119 if (!wireless) {
2120 /* Note that if query fails it is not a hard failure */
2121 wacom_query_tablet_data(hdev, features);
2122 }
2123
2124 /* touch only Bamboo doesn't support pen */
2125 if ((features->type == BAMBOO_TOUCH) &&
2126 (features->device_type & WACOM_DEVICETYPE_PEN)) {
2127 error = -ENODEV;
2128 goto fail_quirks;
2129 }
2130
2131 /* pen only Bamboo neither support touch nor pad */
2132 if ((features->type == BAMBOO_PEN) &&
2133 ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2134 (features->device_type & WACOM_DEVICETYPE_PAD))) {
2135 error = -ENODEV;
2136 goto fail_quirks;
2137 }
2138
2139 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2140 error = hid_hw_open(hdev);
2141
2142 if ((wacom_wac->features.type == INTUOSHT ||
2143 wacom_wac->features.type == INTUOSHT2) &&
2144 (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)) {
2145 wacom_wac->shared->type = wacom_wac->features.type;
2146 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2147 }
2148
2149 devres_close_group(&hdev->dev, wacom);
2150
2151 return 0;
2152
2153 fail_quirks:
2154 hid_hw_stop(hdev);
2155 fail:
2156 wacom_release_resources(wacom);
2157 return error;
2158 }
2159
2160 static void wacom_wireless_work(struct work_struct *work)
2161 {
2162 struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2163 struct usb_device *usbdev = wacom->usbdev;
2164 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2165 struct hid_device *hdev1, *hdev2;
2166 struct wacom *wacom1, *wacom2;
2167 struct wacom_wac *wacom_wac1, *wacom_wac2;
2168 int error;
2169
2170 /*
2171 * Regardless if this is a disconnect or a new tablet,
2172 * remove any existing input and battery devices.
2173 */
2174
2175 wacom_destroy_battery(wacom);
2176
2177 /* Stylus interface */
2178 hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2179 wacom1 = hid_get_drvdata(hdev1);
2180 wacom_wac1 = &(wacom1->wacom_wac);
2181 wacom_release_resources(wacom1);
2182
2183 /* Touch interface */
2184 hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2185 wacom2 = hid_get_drvdata(hdev2);
2186 wacom_wac2 = &(wacom2->wacom_wac);
2187 wacom_release_resources(wacom2);
2188
2189 if (wacom_wac->pid == 0) {
2190 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2191 } else {
2192 const struct hid_device_id *id = wacom_ids;
2193
2194 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2195 wacom_wac->pid);
2196
2197 while (id->bus) {
2198 if (id->vendor == USB_VENDOR_ID_WACOM &&
2199 id->product == wacom_wac->pid)
2200 break;
2201 id++;
2202 }
2203
2204 if (!id->bus) {
2205 hid_info(wacom->hdev, "ignoring unknown PID.\n");
2206 return;
2207 }
2208
2209 /* Stylus interface */
2210 wacom_wac1->features =
2211 *((struct wacom_features *)id->driver_data);
2212
2213 wacom_wac1->pid = wacom_wac->pid;
2214 hid_hw_stop(hdev1);
2215 error = wacom_parse_and_register(wacom1, true);
2216 if (error)
2217 goto fail;
2218
2219 /* Touch interface */
2220 if (wacom_wac1->features.touch_max ||
2221 (wacom_wac1->features.type >= INTUOSHT &&
2222 wacom_wac1->features.type <= BAMBOO_PT)) {
2223 wacom_wac2->features =
2224 *((struct wacom_features *)id->driver_data);
2225 wacom_wac2->pid = wacom_wac->pid;
2226 hid_hw_stop(hdev2);
2227 error = wacom_parse_and_register(wacom2, true);
2228 if (error)
2229 goto fail;
2230 }
2231
2232 strlcpy(wacom_wac->name, wacom_wac1->name,
2233 sizeof(wacom_wac->name));
2234 error = wacom_initialize_battery(wacom);
2235 if (error)
2236 goto fail;
2237 }
2238
2239 return;
2240
2241 fail:
2242 wacom_release_resources(wacom1);
2243 wacom_release_resources(wacom2);
2244 return;
2245 }
2246
2247 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2248 {
2249 struct wacom_remote *remote = wacom->remote;
2250 u32 serial = remote->remotes[index].serial;
2251 int i;
2252 unsigned long flags;
2253
2254 spin_lock_irqsave(&remote->remote_lock, flags);
2255 remote->remotes[index].registered = false;
2256 spin_unlock_irqrestore(&remote->remote_lock, flags);
2257
2258 if (remote->remotes[index].battery.battery)
2259 devres_release_group(&wacom->hdev->dev,
2260 &remote->remotes[index].battery.bat_desc);
2261
2262 if (remote->remotes[index].group.name)
2263 devres_release_group(&wacom->hdev->dev,
2264 &remote->remotes[index]);
2265
2266 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2267 if (remote->remotes[i].serial == serial) {
2268 remote->remotes[i].serial = 0;
2269 remote->remotes[i].group.name = NULL;
2270 remote->remotes[i].registered = false;
2271 remote->remotes[i].battery.battery = NULL;
2272 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2273 }
2274 }
2275 }
2276
2277 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2278 unsigned int index)
2279 {
2280 struct wacom_remote *remote = wacom->remote;
2281 struct device *dev = &wacom->hdev->dev;
2282 int error, k;
2283
2284 /* A remote can pair more than once with an EKR,
2285 * check to make sure this serial isn't already paired.
2286 */
2287 for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2288 if (remote->remotes[k].serial == serial)
2289 break;
2290 }
2291
2292 if (k < WACOM_MAX_REMOTES) {
2293 remote->remotes[index].serial = serial;
2294 return 0;
2295 }
2296
2297 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2298 return -ENOMEM;
2299
2300 error = wacom_remote_create_attr_group(wacom, serial, index);
2301 if (error)
2302 goto fail;
2303
2304 remote->remotes[index].input = wacom_allocate_input(wacom);
2305 if (!remote->remotes[index].input) {
2306 error = -ENOMEM;
2307 goto fail;
2308 }
2309 remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2310 remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2311
2312 if (!remote->remotes[index].input->name) {
2313 error = -EINVAL;
2314 goto fail;
2315 }
2316
2317 error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2318 &wacom->wacom_wac);
2319 if (error)
2320 goto fail;
2321
2322 remote->remotes[index].serial = serial;
2323
2324 error = input_register_device(remote->remotes[index].input);
2325 if (error)
2326 goto fail;
2327
2328 error = wacom_led_groups_alloc_and_register_one(
2329 &remote->remotes[index].input->dev,
2330 wacom, index, 3, true);
2331 if (error)
2332 goto fail;
2333
2334 remote->remotes[index].registered = true;
2335
2336 devres_close_group(dev, &remote->remotes[index]);
2337 return 0;
2338
2339 fail:
2340 devres_release_group(dev, &remote->remotes[index]);
2341 remote->remotes[index].serial = 0;
2342 return error;
2343 }
2344
2345 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2346 {
2347 struct wacom_remote *remote = wacom->remote;
2348 int error;
2349
2350 if (!remote->remotes[index].registered)
2351 return 0;
2352
2353 if (remote->remotes[index].battery.battery)
2354 return 0;
2355
2356 if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2357 return 0;
2358
2359 error = __wacom_initialize_battery(wacom,
2360 &wacom->remote->remotes[index].battery);
2361 if (error)
2362 return error;
2363
2364 return 0;
2365 }
2366
2367 static void wacom_remote_work(struct work_struct *work)
2368 {
2369 struct wacom *wacom = container_of(work, struct wacom, remote_work);
2370 struct wacom_remote *remote = wacom->remote;
2371 struct wacom_remote_data data;
2372 unsigned long flags;
2373 unsigned int count;
2374 u32 serial;
2375 int i;
2376
2377 spin_lock_irqsave(&remote->remote_lock, flags);
2378
2379 count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2380
2381 if (count != sizeof(data)) {
2382 hid_err(wacom->hdev,
2383 "workitem triggered without status available\n");
2384 spin_unlock_irqrestore(&remote->remote_lock, flags);
2385 return;
2386 }
2387
2388 if (!kfifo_is_empty(&remote->remote_fifo))
2389 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2390
2391 spin_unlock_irqrestore(&remote->remote_lock, flags);
2392
2393 for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2394 serial = data.remote[i].serial;
2395 if (data.remote[i].connected) {
2396
2397 if (remote->remotes[i].serial == serial) {
2398 wacom_remote_attach_battery(wacom, i);
2399 continue;
2400 }
2401
2402 if (remote->remotes[i].serial)
2403 wacom_remote_destroy_one(wacom, i);
2404
2405 wacom_remote_create_one(wacom, serial, i);
2406
2407 } else if (remote->remotes[i].serial) {
2408 wacom_remote_destroy_one(wacom, i);
2409 }
2410 }
2411 }
2412
2413 static int wacom_probe(struct hid_device *hdev,
2414 const struct hid_device_id *id)
2415 {
2416 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2417 struct usb_device *dev = interface_to_usbdev(intf);
2418 struct wacom *wacom;
2419 struct wacom_wac *wacom_wac;
2420 struct wacom_features *features;
2421 int error;
2422
2423 if (!id->driver_data)
2424 return -EINVAL;
2425
2426 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2427
2428 /* hid-core sets this quirk for the boot interface */
2429 hdev->quirks &= ~HID_QUIRK_NOGET;
2430
2431 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2432 if (!wacom)
2433 return -ENOMEM;
2434
2435 hid_set_drvdata(hdev, wacom);
2436 wacom->hdev = hdev;
2437
2438 wacom_wac = &wacom->wacom_wac;
2439 wacom_wac->features = *((struct wacom_features *)id->driver_data);
2440 features = &wacom_wac->features;
2441
2442 if (features->check_for_hid_type && features->hid_type != hdev->type) {
2443 error = -ENODEV;
2444 goto fail;
2445 }
2446
2447 wacom_wac->hid_data.inputmode = -1;
2448 wacom_wac->mode_report = -1;
2449
2450 wacom->usbdev = dev;
2451 wacom->intf = intf;
2452 mutex_init(&wacom->lock);
2453 INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2454 INIT_WORK(&wacom->battery_work, wacom_battery_work);
2455 INIT_WORK(&wacom->remote_work, wacom_remote_work);
2456
2457 /* ask for the report descriptor to be loaded by HID */
2458 error = hid_parse(hdev);
2459 if (error) {
2460 hid_err(hdev, "parse failed\n");
2461 goto fail;
2462 }
2463
2464 error = wacom_parse_and_register(wacom, false);
2465 if (error)
2466 goto fail;
2467
2468 if (hdev->bus == BUS_BLUETOOTH) {
2469 error = device_create_file(&hdev->dev, &dev_attr_speed);
2470 if (error)
2471 hid_warn(hdev,
2472 "can't create sysfs speed attribute err: %d\n",
2473 error);
2474 }
2475
2476 return 0;
2477
2478 fail:
2479 hid_set_drvdata(hdev, NULL);
2480 return error;
2481 }
2482
2483 static void wacom_remove(struct hid_device *hdev)
2484 {
2485 struct wacom *wacom = hid_get_drvdata(hdev);
2486 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2487 struct wacom_features *features = &wacom_wac->features;
2488
2489 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2490 hid_hw_close(hdev);
2491
2492 hid_hw_stop(hdev);
2493
2494 cancel_work_sync(&wacom->wireless_work);
2495 cancel_work_sync(&wacom->battery_work);
2496 cancel_work_sync(&wacom->remote_work);
2497 if (hdev->bus == BUS_BLUETOOTH)
2498 device_remove_file(&hdev->dev, &dev_attr_speed);
2499
2500 hid_set_drvdata(hdev, NULL);
2501 }
2502
2503 #ifdef CONFIG_PM
2504 static int wacom_resume(struct hid_device *hdev)
2505 {
2506 struct wacom *wacom = hid_get_drvdata(hdev);
2507 struct wacom_features *features = &wacom->wacom_wac.features;
2508
2509 mutex_lock(&wacom->lock);
2510
2511 /* switch to wacom mode first */
2512 wacom_query_tablet_data(hdev, features);
2513 wacom_led_control(wacom);
2514
2515 mutex_unlock(&wacom->lock);
2516
2517 return 0;
2518 }
2519
2520 static int wacom_reset_resume(struct hid_device *hdev)
2521 {
2522 return wacom_resume(hdev);
2523 }
2524 #endif /* CONFIG_PM */
2525
2526 static struct hid_driver wacom_driver = {
2527 .name = "wacom",
2528 .id_table = wacom_ids,
2529 .probe = wacom_probe,
2530 .remove = wacom_remove,
2531 .report = wacom_wac_report,
2532 #ifdef CONFIG_PM
2533 .resume = wacom_resume,
2534 .reset_resume = wacom_reset_resume,
2535 #endif
2536 .raw_event = wacom_raw_event,
2537 };
2538 module_hid_driver(wacom_driver);
2539
2540 MODULE_VERSION(DRIVER_VERSION);
2541 MODULE_AUTHOR(DRIVER_AUTHOR);
2542 MODULE_DESCRIPTION(DRIVER_DESC);
2543 MODULE_LICENSE(DRIVER_LICENSE);
Linux with added FPC-III support