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