1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/input/tablet/wacom_sys.c 4 * 5 * USB Wacom tablet support - system specific code 6 */ 7 8 /* 9 */ 10 11 #include "wacom_wac.h" 12 #include "wacom.h" 13 #include <linux/input/mt.h> 14 15 #define WAC_MSG_RETRIES 5 16 #define WAC_CMD_RETRIES 10 17 18 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP) 19 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP) 20 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP) 21 22 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf, 23 size_t size, unsigned int retries) 24 { 25 int retval; 26 27 do { 28 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type, 29 HID_REQ_GET_REPORT); 30 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries); 31 32 if (retval < 0) 33 hid_err(hdev, "wacom_get_report: ran out of retries " 34 "(last error = %d)\n", retval); 35 36 return retval; 37 } 38 39 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf, 40 size_t size, unsigned int retries) 41 { 42 int retval; 43 44 do { 45 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type, 46 HID_REQ_SET_REPORT); 47 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries); 48 49 if (retval < 0) 50 hid_err(hdev, "wacom_set_report: ran out of retries " 51 "(last error = %d)\n", retval); 52 53 return retval; 54 } 55 56 static void wacom_wac_queue_insert(struct hid_device *hdev, 57 struct kfifo_rec_ptr_2 *fifo, 58 u8 *raw_data, int size) 59 { 60 bool warned = false; 61 62 while (kfifo_avail(fifo) < size) { 63 if (!warned) 64 hid_warn(hdev, "%s: kfifo has filled, starting to drop events\n", __func__); 65 warned = true; 66 67 kfifo_skip(fifo); 68 } 69 70 kfifo_in(fifo, raw_data, size); 71 } 72 73 static void wacom_wac_queue_flush(struct hid_device *hdev, 74 struct kfifo_rec_ptr_2 *fifo) 75 { 76 while (!kfifo_is_empty(fifo)) { 77 u8 buf[WACOM_PKGLEN_MAX]; 78 int size; 79 int err; 80 81 size = kfifo_out(fifo, buf, sizeof(buf)); 82 err = hid_report_raw_event(hdev, HID_INPUT_REPORT, buf, size, false); 83 if (err) { 84 hid_warn(hdev, "%s: unable to flush event due to error %d\n", 85 __func__, err); 86 } 87 } 88 } 89 90 static int wacom_wac_pen_serial_enforce(struct hid_device *hdev, 91 struct hid_report *report, u8 *raw_data, int size) 92 { 93 struct wacom *wacom = hid_get_drvdata(hdev); 94 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 95 struct wacom_features *features = &wacom_wac->features; 96 bool flush = false; 97 bool insert = false; 98 int i, j; 99 100 if (wacom_wac->serial[0] || !(features->quirks & WACOM_QUIRK_TOOLSERIAL)) 101 return 0; 102 103 /* Queue events which have invalid tool type or serial number */ 104 for (i = 0; i < report->maxfield; i++) { 105 for (j = 0; j < report->field[i]->maxusage; j++) { 106 struct hid_field *field = report->field[i]; 107 struct hid_usage *usage = &field->usage[j]; 108 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid); 109 unsigned int offset; 110 unsigned int size; 111 unsigned int value; 112 113 if (equivalent_usage != HID_DG_INRANGE && 114 equivalent_usage != HID_DG_TOOLSERIALNUMBER && 115 equivalent_usage != WACOM_HID_WD_SERIALHI && 116 equivalent_usage != WACOM_HID_WD_TOOLTYPE) 117 continue; 118 119 offset = field->report_offset; 120 size = field->report_size; 121 value = hid_field_extract(hdev, raw_data+1, offset + j * size, size); 122 123 /* If we go out of range, we need to flush the queue ASAP */ 124 if (equivalent_usage == HID_DG_INRANGE) 125 value = !value; 126 127 if (value) { 128 flush = true; 129 switch (equivalent_usage) { 130 case HID_DG_TOOLSERIALNUMBER: 131 wacom_wac->serial[0] = value; 132 break; 133 134 case WACOM_HID_WD_SERIALHI: 135 wacom_wac->serial[0] |= ((__u64)value) << 32; 136 break; 137 138 case WACOM_HID_WD_TOOLTYPE: 139 wacom_wac->id[0] = value; 140 break; 141 } 142 } 143 else { 144 insert = true; 145 } 146 } 147 } 148 149 if (flush) 150 wacom_wac_queue_flush(hdev, &wacom_wac->pen_fifo); 151 else if (insert) 152 wacom_wac_queue_insert(hdev, &wacom_wac->pen_fifo, raw_data, size); 153 154 return insert && !flush; 155 } 156 157 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report, 158 u8 *raw_data, int size) 159 { 160 struct wacom *wacom = hid_get_drvdata(hdev); 161 162 if (size > WACOM_PKGLEN_MAX) 163 return 1; 164 165 if (wacom_wac_pen_serial_enforce(hdev, report, raw_data, size)) 166 return -1; 167 168 memcpy(wacom->wacom_wac.data, raw_data, size); 169 170 wacom_wac_irq(&wacom->wacom_wac, size); 171 172 return 0; 173 } 174 175 static int wacom_open(struct input_dev *dev) 176 { 177 struct wacom *wacom = input_get_drvdata(dev); 178 179 return hid_hw_open(wacom->hdev); 180 } 181 182 static void wacom_close(struct input_dev *dev) 183 { 184 struct wacom *wacom = input_get_drvdata(dev); 185 186 /* 187 * wacom->hdev should never be null, but surprisingly, I had the case 188 * once while unplugging the Wacom Wireless Receiver. 189 */ 190 if (wacom->hdev) 191 hid_hw_close(wacom->hdev); 192 } 193 194 /* 195 * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res. 196 */ 197 static int wacom_calc_hid_res(int logical_extents, int physical_extents, 198 unsigned unit, int exponent) 199 { 200 struct hid_field field = { 201 .logical_maximum = logical_extents, 202 .physical_maximum = physical_extents, 203 .unit = unit, 204 .unit_exponent = exponent, 205 }; 206 207 return hidinput_calc_abs_res(&field, ABS_X); 208 } 209 210 static void wacom_hid_usage_quirk(struct hid_device *hdev, 211 struct hid_field *field, struct hid_usage *usage) 212 { 213 struct wacom *wacom = hid_get_drvdata(hdev); 214 struct wacom_features *features = &wacom->wacom_wac.features; 215 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid); 216 217 /* 218 * The Dell Canvas 27 needs to be switched to its vendor-defined 219 * report to provide the best resolution. 220 */ 221 if (hdev->vendor == USB_VENDOR_ID_WACOM && 222 hdev->product == 0x4200 && 223 field->application == HID_UP_MSVENDOR) { 224 wacom->wacom_wac.mode_report = field->report->id; 225 wacom->wacom_wac.mode_value = 2; 226 } 227 228 /* 229 * ISDv4 devices which predate HID's adoption of the 230 * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its 231 * position instead. We can accurately detect if a 232 * usage with that value should be HID_DG_BARRELSWITCH2 233 * based on the surrounding usages, which have remained 234 * constant across generations. 235 */ 236 if (features->type == HID_GENERIC && 237 usage->hid == 0x000D0000 && 238 field->application == HID_DG_PEN && 239 field->physical == HID_DG_STYLUS) { 240 int i = usage->usage_index; 241 242 if (i-4 >= 0 && i+1 < field->maxusage && 243 field->usage[i-4].hid == HID_DG_TIPSWITCH && 244 field->usage[i-3].hid == HID_DG_BARRELSWITCH && 245 field->usage[i-2].hid == HID_DG_ERASER && 246 field->usage[i-1].hid == HID_DG_INVERT && 247 field->usage[i+1].hid == HID_DG_INRANGE) { 248 usage->hid = HID_DG_BARRELSWITCH2; 249 } 250 } 251 252 /* 253 * Wacom's AES devices use different vendor-defined usages to 254 * report serial number information compared to their branded 255 * hardware. The usages are also sometimes ill-defined and do 256 * not have the correct logical min/max values set. Lets patch 257 * the descriptor to use the branded usage convention and fix 258 * the errors. 259 */ 260 if (usage->hid == WACOM_HID_WT_SERIALNUMBER && 261 field->report_size == 16 && 262 field->index + 2 < field->report->maxfield) { 263 struct hid_field *a = field->report->field[field->index + 1]; 264 struct hid_field *b = field->report->field[field->index + 2]; 265 266 if (a->maxusage > 0 && 267 a->usage[0].hid == HID_DG_TOOLSERIALNUMBER && 268 a->report_size == 32 && 269 b->maxusage > 0 && 270 b->usage[0].hid == 0xFF000000 && 271 b->report_size == 8) { 272 features->quirks |= WACOM_QUIRK_AESPEN; 273 usage->hid = WACOM_HID_WD_TOOLTYPE; 274 field->logical_minimum = S16_MIN; 275 field->logical_maximum = S16_MAX; 276 a->logical_minimum = S32_MIN; 277 a->logical_maximum = S32_MAX; 278 b->usage[0].hid = WACOM_HID_WD_SERIALHI; 279 b->logical_minimum = 0; 280 b->logical_maximum = U8_MAX; 281 } 282 } 283 284 /* 2nd-generation Intuos Pro Large has incorrect Y maximum */ 285 if (hdev->vendor == USB_VENDOR_ID_WACOM && 286 hdev->product == 0x0358 && 287 WACOM_PEN_FIELD(field) && 288 equivalent_usage == HID_GD_Y) { 289 field->logical_maximum = 43200; 290 } 291 } 292 293 static void wacom_feature_mapping(struct hid_device *hdev, 294 struct hid_field *field, struct hid_usage *usage) 295 { 296 struct wacom *wacom = hid_get_drvdata(hdev); 297 struct wacom_features *features = &wacom->wacom_wac.features; 298 struct hid_data *hid_data = &wacom->wacom_wac.hid_data; 299 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid); 300 u8 *data; 301 int ret; 302 u32 n; 303 304 wacom_hid_usage_quirk(hdev, field, usage); 305 306 switch (equivalent_usage) { 307 case HID_DG_CONTACTMAX: 308 /* leave touch_max as is if predefined */ 309 if (!features->touch_max) { 310 /* read manually */ 311 data = kzalloc(2, GFP_KERNEL); 312 if (!data) 313 break; 314 data[0] = field->report->id; 315 ret = wacom_get_report(hdev, HID_FEATURE_REPORT, 316 data, 2, WAC_CMD_RETRIES); 317 if (ret == 2) { 318 features->touch_max = data[1]; 319 } else { 320 features->touch_max = 16; 321 hid_warn(hdev, "wacom_feature_mapping: " 322 "could not get HID_DG_CONTACTMAX, " 323 "defaulting to %d\n", 324 features->touch_max); 325 } 326 kfree(data); 327 } 328 break; 329 case HID_DG_INPUTMODE: 330 /* Ignore if value index is out of bounds. */ 331 if (usage->usage_index >= field->report_count) { 332 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n"); 333 break; 334 } 335 336 hid_data->inputmode = field->report->id; 337 hid_data->inputmode_index = usage->usage_index; 338 break; 339 340 case HID_UP_DIGITIZER: 341 if (field->report->id == 0x0B && 342 (field->application == WACOM_HID_G9_PEN || 343 field->application == WACOM_HID_G11_PEN)) { 344 wacom->wacom_wac.mode_report = field->report->id; 345 wacom->wacom_wac.mode_value = 0; 346 } 347 break; 348 349 case WACOM_HID_WD_DATAMODE: 350 wacom->wacom_wac.mode_report = field->report->id; 351 wacom->wacom_wac.mode_value = 2; 352 break; 353 354 case WACOM_HID_UP_G9: 355 case WACOM_HID_UP_G11: 356 if (field->report->id == 0x03 && 357 (field->application == WACOM_HID_G9_TOUCHSCREEN || 358 field->application == WACOM_HID_G11_TOUCHSCREEN)) { 359 wacom->wacom_wac.mode_report = field->report->id; 360 wacom->wacom_wac.mode_value = 0; 361 } 362 break; 363 case WACOM_HID_WD_OFFSETLEFT: 364 case WACOM_HID_WD_OFFSETTOP: 365 case WACOM_HID_WD_OFFSETRIGHT: 366 case WACOM_HID_WD_OFFSETBOTTOM: 367 /* read manually */ 368 n = hid_report_len(field->report); 369 data = hid_alloc_report_buf(field->report, GFP_KERNEL); 370 if (!data) 371 break; 372 data[0] = field->report->id; 373 ret = wacom_get_report(hdev, HID_FEATURE_REPORT, 374 data, n, WAC_CMD_RETRIES); 375 if (ret == n) { 376 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, 377 data, n, 0); 378 } else { 379 hid_warn(hdev, "%s: could not retrieve sensor offsets\n", 380 __func__); 381 } 382 kfree(data); 383 break; 384 } 385 } 386 387 /* 388 * Interface Descriptor of wacom devices can be incomplete and 389 * inconsistent so wacom_features table is used to store stylus 390 * device's packet lengths, various maximum values, and tablet 391 * resolution based on product ID's. 392 * 393 * For devices that contain 2 interfaces, wacom_features table is 394 * inaccurate for the touch interface. Since the Interface Descriptor 395 * for touch interfaces has pretty complete data, this function exists 396 * to query tablet for this missing information instead of hard coding in 397 * an additional table. 398 * 399 * A typical Interface Descriptor for a stylus will contain a 400 * boot mouse application collection that is not of interest and this 401 * function will ignore it. 402 * 403 * It also contains a digitizer application collection that also is not 404 * of interest since any information it contains would be duplicate 405 * of what is in wacom_features. Usually it defines a report of an array 406 * of bytes that could be used as max length of the stylus packet returned. 407 * If it happens to define a Digitizer-Stylus Physical Collection then 408 * the X and Y logical values contain valid data but it is ignored. 409 * 410 * A typical Interface Descriptor for a touch interface will contain a 411 * Digitizer-Finger Physical Collection which will define both logical 412 * X/Y maximum as well as the physical size of tablet. Since touch 413 * interfaces haven't supported pressure or distance, this is enough 414 * information to override invalid values in the wacom_features table. 415 * 416 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful 417 * data. We deal with them after returning from this function. 418 */ 419 static void wacom_usage_mapping(struct hid_device *hdev, 420 struct hid_field *field, struct hid_usage *usage) 421 { 422 struct wacom *wacom = hid_get_drvdata(hdev); 423 struct wacom_features *features = &wacom->wacom_wac.features; 424 bool finger = WACOM_FINGER_FIELD(field); 425 bool pen = WACOM_PEN_FIELD(field); 426 unsigned equivalent_usage = wacom_equivalent_usage(usage->hid); 427 428 /* 429 * Requiring Stylus Usage will ignore boot mouse 430 * X/Y values and some cases of invalid Digitizer X/Y 431 * values commonly reported. 432 */ 433 if (pen) 434 features->device_type |= WACOM_DEVICETYPE_PEN; 435 else if (finger) 436 features->device_type |= WACOM_DEVICETYPE_TOUCH; 437 else 438 return; 439 440 wacom_hid_usage_quirk(hdev, field, usage); 441 442 switch (equivalent_usage) { 443 case HID_GD_X: 444 features->x_max = field->logical_maximum; 445 if (finger) { 446 features->x_phy = field->physical_maximum; 447 if ((features->type != BAMBOO_PT) && 448 (features->type != BAMBOO_TOUCH)) { 449 features->unit = field->unit; 450 features->unitExpo = field->unit_exponent; 451 } 452 } 453 break; 454 case HID_GD_Y: 455 features->y_max = field->logical_maximum; 456 if (finger) { 457 features->y_phy = field->physical_maximum; 458 if ((features->type != BAMBOO_PT) && 459 (features->type != BAMBOO_TOUCH)) { 460 features->unit = field->unit; 461 features->unitExpo = field->unit_exponent; 462 } 463 } 464 break; 465 case HID_DG_TIPPRESSURE: 466 if (pen) 467 features->pressure_max = field->logical_maximum; 468 break; 469 } 470 471 if (features->type == HID_GENERIC) 472 wacom_wac_usage_mapping(hdev, field, usage); 473 } 474 475 static void wacom_post_parse_hid(struct hid_device *hdev, 476 struct wacom_features *features) 477 { 478 struct wacom *wacom = hid_get_drvdata(hdev); 479 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 480 481 if (features->type == HID_GENERIC) { 482 /* Any last-minute generic device setup */ 483 if (wacom_wac->has_mode_change) { 484 if (wacom_wac->is_direct_mode) 485 features->device_type |= WACOM_DEVICETYPE_DIRECT; 486 else 487 features->device_type &= ~WACOM_DEVICETYPE_DIRECT; 488 } 489 490 if (features->touch_max > 1) { 491 if (features->device_type & WACOM_DEVICETYPE_DIRECT) 492 input_mt_init_slots(wacom_wac->touch_input, 493 wacom_wac->features.touch_max, 494 INPUT_MT_DIRECT); 495 else 496 input_mt_init_slots(wacom_wac->touch_input, 497 wacom_wac->features.touch_max, 498 INPUT_MT_POINTER); 499 } 500 } 501 } 502 503 static void wacom_parse_hid(struct hid_device *hdev, 504 struct wacom_features *features) 505 { 506 struct hid_report_enum *rep_enum; 507 struct hid_report *hreport; 508 int i, j; 509 510 /* check features first */ 511 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT]; 512 list_for_each_entry(hreport, &rep_enum->report_list, list) { 513 for (i = 0; i < hreport->maxfield; i++) { 514 /* Ignore if report count is out of bounds. */ 515 if (hreport->field[i]->report_count < 1) 516 continue; 517 518 for (j = 0; j < hreport->field[i]->maxusage; j++) { 519 wacom_feature_mapping(hdev, hreport->field[i], 520 hreport->field[i]->usage + j); 521 } 522 } 523 } 524 525 /* now check the input usages */ 526 rep_enum = &hdev->report_enum[HID_INPUT_REPORT]; 527 list_for_each_entry(hreport, &rep_enum->report_list, list) { 528 529 if (!hreport->maxfield) 530 continue; 531 532 for (i = 0; i < hreport->maxfield; i++) 533 for (j = 0; j < hreport->field[i]->maxusage; j++) 534 wacom_usage_mapping(hdev, hreport->field[i], 535 hreport->field[i]->usage + j); 536 } 537 538 wacom_post_parse_hid(hdev, features); 539 } 540 541 static int wacom_hid_set_device_mode(struct hid_device *hdev) 542 { 543 struct wacom *wacom = hid_get_drvdata(hdev); 544 struct hid_data *hid_data = &wacom->wacom_wac.hid_data; 545 struct hid_report *r; 546 struct hid_report_enum *re; 547 548 if (hid_data->inputmode < 0) 549 return 0; 550 551 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 552 r = re->report_id_hash[hid_data->inputmode]; 553 if (r) { 554 r->field[0]->value[hid_data->inputmode_index] = 2; 555 hid_hw_request(hdev, r, HID_REQ_SET_REPORT); 556 } 557 return 0; 558 } 559 560 static int wacom_set_device_mode(struct hid_device *hdev, 561 struct wacom_wac *wacom_wac) 562 { 563 u8 *rep_data; 564 struct hid_report *r; 565 struct hid_report_enum *re; 566 u32 length; 567 int error = -ENOMEM, limit = 0; 568 569 if (wacom_wac->mode_report < 0) 570 return 0; 571 572 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 573 r = re->report_id_hash[wacom_wac->mode_report]; 574 if (!r) 575 return -EINVAL; 576 577 rep_data = hid_alloc_report_buf(r, GFP_KERNEL); 578 if (!rep_data) 579 return -ENOMEM; 580 581 length = hid_report_len(r); 582 583 do { 584 rep_data[0] = wacom_wac->mode_report; 585 rep_data[1] = wacom_wac->mode_value; 586 587 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 588 length, 1); 589 if (error >= 0) 590 error = wacom_get_report(hdev, HID_FEATURE_REPORT, 591 rep_data, length, 1); 592 } while (error >= 0 && 593 rep_data[1] != wacom_wac->mode_report && 594 limit++ < WAC_MSG_RETRIES); 595 596 kfree(rep_data); 597 598 return error < 0 ? error : 0; 599 } 600 601 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed, 602 struct wacom_features *features) 603 { 604 struct wacom *wacom = hid_get_drvdata(hdev); 605 int ret; 606 u8 rep_data[2]; 607 608 switch (features->type) { 609 case GRAPHIRE_BT: 610 rep_data[0] = 0x03; 611 rep_data[1] = 0x00; 612 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2, 613 3); 614 615 if (ret >= 0) { 616 rep_data[0] = speed == 0 ? 0x05 : 0x06; 617 rep_data[1] = 0x00; 618 619 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, 620 rep_data, 2, 3); 621 622 if (ret >= 0) { 623 wacom->wacom_wac.bt_high_speed = speed; 624 return 0; 625 } 626 } 627 628 /* 629 * Note that if the raw queries fail, it's not a hard failure 630 * and it is safe to continue 631 */ 632 hid_warn(hdev, "failed to poke device, command %d, err %d\n", 633 rep_data[0], ret); 634 break; 635 case INTUOS4WL: 636 if (speed == 1) 637 wacom->wacom_wac.bt_features &= ~0x20; 638 else 639 wacom->wacom_wac.bt_features |= 0x20; 640 641 rep_data[0] = 0x03; 642 rep_data[1] = wacom->wacom_wac.bt_features; 643 644 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2, 645 1); 646 if (ret >= 0) 647 wacom->wacom_wac.bt_high_speed = speed; 648 break; 649 } 650 651 return 0; 652 } 653 654 /* 655 * Switch the tablet into its most-capable mode. Wacom tablets are 656 * typically configured to power-up in a mode which sends mouse-like 657 * reports to the OS. To get absolute position, pressure data, etc. 658 * from the tablet, it is necessary to switch the tablet out of this 659 * mode and into one which sends the full range of tablet data. 660 */ 661 static int _wacom_query_tablet_data(struct wacom *wacom) 662 { 663 struct hid_device *hdev = wacom->hdev; 664 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 665 struct wacom_features *features = &wacom_wac->features; 666 667 if (hdev->bus == BUS_BLUETOOTH) 668 return wacom_bt_query_tablet_data(hdev, 1, features); 669 670 if (features->type != HID_GENERIC) { 671 if (features->device_type & WACOM_DEVICETYPE_TOUCH) { 672 if (features->type > TABLETPC) { 673 /* MT Tablet PC touch */ 674 wacom_wac->mode_report = 3; 675 wacom_wac->mode_value = 4; 676 } else if (features->type == WACOM_24HDT) { 677 wacom_wac->mode_report = 18; 678 wacom_wac->mode_value = 2; 679 } else if (features->type == WACOM_27QHDT) { 680 wacom_wac->mode_report = 131; 681 wacom_wac->mode_value = 2; 682 } else if (features->type == BAMBOO_PAD) { 683 wacom_wac->mode_report = 2; 684 wacom_wac->mode_value = 2; 685 } 686 } else if (features->device_type & WACOM_DEVICETYPE_PEN) { 687 if (features->type <= BAMBOO_PT) { 688 wacom_wac->mode_report = 2; 689 wacom_wac->mode_value = 2; 690 } 691 } 692 } 693 694 wacom_set_device_mode(hdev, wacom_wac); 695 696 if (features->type == HID_GENERIC) 697 return wacom_hid_set_device_mode(hdev); 698 699 return 0; 700 } 701 702 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev, 703 struct wacom_features *features) 704 { 705 struct wacom *wacom = hid_get_drvdata(hdev); 706 struct usb_interface *intf = wacom->intf; 707 708 /* default features */ 709 features->x_fuzz = 4; 710 features->y_fuzz = 4; 711 features->pressure_fuzz = 0; 712 features->distance_fuzz = 1; 713 features->tilt_fuzz = 1; 714 715 /* 716 * The wireless device HID is basic and layout conflicts with 717 * other tablets (monitor and touch interface can look like pen). 718 * Skip the query for this type and modify defaults based on 719 * interface number. 720 */ 721 if (features->type == WIRELESS) { 722 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) 723 features->device_type = WACOM_DEVICETYPE_WL_MONITOR; 724 else 725 features->device_type = WACOM_DEVICETYPE_NONE; 726 return; 727 } 728 729 wacom_parse_hid(hdev, features); 730 } 731 732 struct wacom_hdev_data { 733 struct list_head list; 734 struct kref kref; 735 struct hid_device *dev; 736 struct wacom_shared shared; 737 }; 738 739 static LIST_HEAD(wacom_udev_list); 740 static DEFINE_MUTEX(wacom_udev_list_lock); 741 742 static bool wacom_are_sibling(struct hid_device *hdev, 743 struct hid_device *sibling) 744 { 745 struct wacom *wacom = hid_get_drvdata(hdev); 746 struct wacom_features *features = &wacom->wacom_wac.features; 747 struct wacom *sibling_wacom = hid_get_drvdata(sibling); 748 struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features; 749 __u32 oVid = features->oVid ? features->oVid : hdev->vendor; 750 __u32 oPid = features->oPid ? features->oPid : hdev->product; 751 752 /* The defined oVid/oPid must match that of the sibling */ 753 if (features->oVid != HID_ANY_ID && sibling->vendor != oVid) 754 return false; 755 if (features->oPid != HID_ANY_ID && sibling->product != oPid) 756 return false; 757 758 /* 759 * Devices with the same VID/PID must share the same physical 760 * device path, while those with different VID/PID must share 761 * the same physical parent device path. 762 */ 763 if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) { 764 if (!hid_compare_device_paths(hdev, sibling, '/')) 765 return false; 766 } else { 767 if (!hid_compare_device_paths(hdev, sibling, '.')) 768 return false; 769 } 770 771 /* Skip the remaining heuristics unless you are a HID_GENERIC device */ 772 if (features->type != HID_GENERIC) 773 return true; 774 775 /* 776 * Direct-input devices may not be siblings of indirect-input 777 * devices. 778 */ 779 if ((features->device_type & WACOM_DEVICETYPE_DIRECT) && 780 !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT)) 781 return false; 782 783 /* 784 * Indirect-input devices may not be siblings of direct-input 785 * devices. 786 */ 787 if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) && 788 (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT)) 789 return false; 790 791 /* Pen devices may only be siblings of touch devices */ 792 if ((features->device_type & WACOM_DEVICETYPE_PEN) && 793 !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH)) 794 return false; 795 796 /* Touch devices may only be siblings of pen devices */ 797 if ((features->device_type & WACOM_DEVICETYPE_TOUCH) && 798 !(sibling_features->device_type & WACOM_DEVICETYPE_PEN)) 799 return false; 800 801 /* 802 * No reason could be found for these two devices to NOT be 803 * siblings, so there's a good chance they ARE siblings 804 */ 805 return true; 806 } 807 808 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev) 809 { 810 struct wacom_hdev_data *data; 811 812 /* Try to find an already-probed interface from the same device */ 813 list_for_each_entry(data, &wacom_udev_list, list) { 814 if (hid_compare_device_paths(hdev, data->dev, '/')) { 815 kref_get(&data->kref); 816 return data; 817 } 818 } 819 820 /* Fallback to finding devices that appear to be "siblings" */ 821 list_for_each_entry(data, &wacom_udev_list, list) { 822 if (wacom_are_sibling(hdev, data->dev)) { 823 kref_get(&data->kref); 824 return data; 825 } 826 } 827 828 return NULL; 829 } 830 831 static void wacom_release_shared_data(struct kref *kref) 832 { 833 struct wacom_hdev_data *data = 834 container_of(kref, struct wacom_hdev_data, kref); 835 836 mutex_lock(&wacom_udev_list_lock); 837 list_del(&data->list); 838 mutex_unlock(&wacom_udev_list_lock); 839 840 kfree(data); 841 } 842 843 static void wacom_remove_shared_data(void *res) 844 { 845 struct wacom *wacom = res; 846 struct wacom_hdev_data *data; 847 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 848 849 if (wacom_wac->shared) { 850 data = container_of(wacom_wac->shared, struct wacom_hdev_data, 851 shared); 852 853 if (wacom_wac->shared->touch == wacom->hdev) 854 wacom_wac->shared->touch = NULL; 855 else if (wacom_wac->shared->pen == wacom->hdev) 856 wacom_wac->shared->pen = NULL; 857 858 kref_put(&data->kref, wacom_release_shared_data); 859 wacom_wac->shared = NULL; 860 } 861 } 862 863 static int wacom_add_shared_data(struct hid_device *hdev) 864 { 865 struct wacom *wacom = hid_get_drvdata(hdev); 866 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 867 struct wacom_hdev_data *data; 868 int retval = 0; 869 870 mutex_lock(&wacom_udev_list_lock); 871 872 data = wacom_get_hdev_data(hdev); 873 if (!data) { 874 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL); 875 if (!data) { 876 retval = -ENOMEM; 877 goto out; 878 } 879 880 kref_init(&data->kref); 881 data->dev = hdev; 882 list_add_tail(&data->list, &wacom_udev_list); 883 } 884 885 wacom_wac->shared = &data->shared; 886 887 retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom); 888 if (retval) { 889 mutex_unlock(&wacom_udev_list_lock); 890 wacom_remove_shared_data(wacom); 891 return retval; 892 } 893 894 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) 895 wacom_wac->shared->touch = hdev; 896 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN) 897 wacom_wac->shared->pen = hdev; 898 899 out: 900 mutex_unlock(&wacom_udev_list_lock); 901 return retval; 902 } 903 904 static int wacom_led_control(struct wacom *wacom) 905 { 906 unsigned char *buf; 907 int retval; 908 unsigned char report_id = WAC_CMD_LED_CONTROL; 909 int buf_size = 9; 910 911 if (!wacom->led.groups) 912 return -ENOTSUPP; 913 914 if (wacom->wacom_wac.features.type == REMOTE) 915 return -ENOTSUPP; 916 917 if (wacom->wacom_wac.pid) { /* wireless connected */ 918 report_id = WAC_CMD_WL_LED_CONTROL; 919 buf_size = 13; 920 } 921 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) { 922 report_id = WAC_CMD_WL_INTUOSP2; 923 buf_size = 51; 924 } 925 buf = kzalloc(buf_size, GFP_KERNEL); 926 if (!buf) 927 return -ENOMEM; 928 929 if (wacom->wacom_wac.features.type == HID_GENERIC) { 930 buf[0] = WAC_CMD_LED_CONTROL_GENERIC; 931 buf[1] = wacom->led.llv; 932 buf[2] = wacom->led.groups[0].select & 0x03; 933 934 } else if ((wacom->wacom_wac.features.type >= INTUOS5S && 935 wacom->wacom_wac.features.type <= INTUOSPL)) { 936 /* 937 * Touch Ring and crop mark LED luminance may take on 938 * one of four values: 939 * 0 = Low; 1 = Medium; 2 = High; 3 = Off 940 */ 941 int ring_led = wacom->led.groups[0].select & 0x03; 942 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03; 943 int crop_lum = 0; 944 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led); 945 946 buf[0] = report_id; 947 if (wacom->wacom_wac.pid) { 948 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT, 949 buf, buf_size, WAC_CMD_RETRIES); 950 buf[0] = report_id; 951 buf[4] = led_bits; 952 } else 953 buf[1] = led_bits; 954 } 955 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) { 956 buf[0] = report_id; 957 buf[4] = 100; // Power Connection LED (ORANGE) 958 buf[5] = 100; // BT Connection LED (BLUE) 959 buf[6] = 100; // Paper Mode (RED?) 960 buf[7] = 100; // Paper Mode (GREEN?) 961 buf[8] = 100; // Paper Mode (BLUE?) 962 buf[9] = wacom->led.llv; 963 buf[10] = wacom->led.groups[0].select & 0x03; 964 } 965 else { 966 int led = wacom->led.groups[0].select | 0x4; 967 968 if (wacom->wacom_wac.features.type == WACOM_21UX2 || 969 wacom->wacom_wac.features.type == WACOM_24HD) 970 led |= (wacom->led.groups[1].select << 4) | 0x40; 971 972 buf[0] = report_id; 973 buf[1] = led; 974 buf[2] = wacom->led.llv; 975 buf[3] = wacom->led.hlv; 976 buf[4] = wacom->led.img_lum; 977 } 978 979 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size, 980 WAC_CMD_RETRIES); 981 kfree(buf); 982 983 return retval; 984 } 985 986 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id, 987 const unsigned len, const void *img) 988 { 989 unsigned char *buf; 990 int i, retval; 991 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */ 992 993 buf = kzalloc(chunk_len + 3 , GFP_KERNEL); 994 if (!buf) 995 return -ENOMEM; 996 997 /* Send 'start' command */ 998 buf[0] = WAC_CMD_ICON_START; 999 buf[1] = 1; 1000 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2, 1001 WAC_CMD_RETRIES); 1002 if (retval < 0) 1003 goto out; 1004 1005 buf[0] = xfer_id; 1006 buf[1] = button_id & 0x07; 1007 for (i = 0; i < 4; i++) { 1008 buf[2] = i; 1009 memcpy(buf + 3, img + i * chunk_len, chunk_len); 1010 1011 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, 1012 buf, chunk_len + 3, WAC_CMD_RETRIES); 1013 if (retval < 0) 1014 break; 1015 } 1016 1017 /* Send 'stop' */ 1018 buf[0] = WAC_CMD_ICON_START; 1019 buf[1] = 0; 1020 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2, 1021 WAC_CMD_RETRIES); 1022 1023 out: 1024 kfree(buf); 1025 return retval; 1026 } 1027 1028 static ssize_t wacom_led_select_store(struct device *dev, int set_id, 1029 const char *buf, size_t count) 1030 { 1031 struct hid_device *hdev = to_hid_device(dev); 1032 struct wacom *wacom = hid_get_drvdata(hdev); 1033 unsigned int id; 1034 int err; 1035 1036 err = kstrtouint(buf, 10, &id); 1037 if (err) 1038 return err; 1039 1040 mutex_lock(&wacom->lock); 1041 1042 wacom->led.groups[set_id].select = id & 0x3; 1043 err = wacom_led_control(wacom); 1044 1045 mutex_unlock(&wacom->lock); 1046 1047 return err < 0 ? err : count; 1048 } 1049 1050 #define DEVICE_LED_SELECT_ATTR(SET_ID) \ 1051 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \ 1052 struct device_attribute *attr, const char *buf, size_t count) \ 1053 { \ 1054 return wacom_led_select_store(dev, SET_ID, buf, count); \ 1055 } \ 1056 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \ 1057 struct device_attribute *attr, char *buf) \ 1058 { \ 1059 struct hid_device *hdev = to_hid_device(dev);\ 1060 struct wacom *wacom = hid_get_drvdata(hdev); \ 1061 return scnprintf(buf, PAGE_SIZE, "%d\n", \ 1062 wacom->led.groups[SET_ID].select); \ 1063 } \ 1064 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \ 1065 wacom_led##SET_ID##_select_show, \ 1066 wacom_led##SET_ID##_select_store) 1067 1068 DEVICE_LED_SELECT_ATTR(0); 1069 DEVICE_LED_SELECT_ATTR(1); 1070 1071 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest, 1072 const char *buf, size_t count) 1073 { 1074 unsigned int value; 1075 int err; 1076 1077 err = kstrtouint(buf, 10, &value); 1078 if (err) 1079 return err; 1080 1081 mutex_lock(&wacom->lock); 1082 1083 *dest = value & 0x7f; 1084 err = wacom_led_control(wacom); 1085 1086 mutex_unlock(&wacom->lock); 1087 1088 return err < 0 ? err : count; 1089 } 1090 1091 #define DEVICE_LUMINANCE_ATTR(name, field) \ 1092 static ssize_t wacom_##name##_luminance_store(struct device *dev, \ 1093 struct device_attribute *attr, const char *buf, size_t count) \ 1094 { \ 1095 struct hid_device *hdev = to_hid_device(dev);\ 1096 struct wacom *wacom = hid_get_drvdata(hdev); \ 1097 \ 1098 return wacom_luminance_store(wacom, &wacom->led.field, \ 1099 buf, count); \ 1100 } \ 1101 static ssize_t wacom_##name##_luminance_show(struct device *dev, \ 1102 struct device_attribute *attr, char *buf) \ 1103 { \ 1104 struct wacom *wacom = dev_get_drvdata(dev); \ 1105 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \ 1106 } \ 1107 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \ 1108 wacom_##name##_luminance_show, \ 1109 wacom_##name##_luminance_store) 1110 1111 DEVICE_LUMINANCE_ATTR(status0, llv); 1112 DEVICE_LUMINANCE_ATTR(status1, hlv); 1113 DEVICE_LUMINANCE_ATTR(buttons, img_lum); 1114 1115 static ssize_t wacom_button_image_store(struct device *dev, int button_id, 1116 const char *buf, size_t count) 1117 { 1118 struct hid_device *hdev = to_hid_device(dev); 1119 struct wacom *wacom = hid_get_drvdata(hdev); 1120 int err; 1121 unsigned len; 1122 u8 xfer_id; 1123 1124 if (hdev->bus == BUS_BLUETOOTH) { 1125 len = 256; 1126 xfer_id = WAC_CMD_ICON_BT_XFER; 1127 } else { 1128 len = 1024; 1129 xfer_id = WAC_CMD_ICON_XFER; 1130 } 1131 1132 if (count != len) 1133 return -EINVAL; 1134 1135 mutex_lock(&wacom->lock); 1136 1137 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf); 1138 1139 mutex_unlock(&wacom->lock); 1140 1141 return err < 0 ? err : count; 1142 } 1143 1144 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \ 1145 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \ 1146 struct device_attribute *attr, const char *buf, size_t count) \ 1147 { \ 1148 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \ 1149 } \ 1150 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \ 1151 NULL, wacom_btnimg##BUTTON_ID##_store) 1152 1153 DEVICE_BTNIMG_ATTR(0); 1154 DEVICE_BTNIMG_ATTR(1); 1155 DEVICE_BTNIMG_ATTR(2); 1156 DEVICE_BTNIMG_ATTR(3); 1157 DEVICE_BTNIMG_ATTR(4); 1158 DEVICE_BTNIMG_ATTR(5); 1159 DEVICE_BTNIMG_ATTR(6); 1160 DEVICE_BTNIMG_ATTR(7); 1161 1162 static struct attribute *cintiq_led_attrs[] = { 1163 &dev_attr_status_led0_select.attr, 1164 &dev_attr_status_led1_select.attr, 1165 NULL 1166 }; 1167 1168 static struct attribute_group cintiq_led_attr_group = { 1169 .name = "wacom_led", 1170 .attrs = cintiq_led_attrs, 1171 }; 1172 1173 static struct attribute *intuos4_led_attrs[] = { 1174 &dev_attr_status0_luminance.attr, 1175 &dev_attr_status1_luminance.attr, 1176 &dev_attr_status_led0_select.attr, 1177 &dev_attr_buttons_luminance.attr, 1178 &dev_attr_button0_rawimg.attr, 1179 &dev_attr_button1_rawimg.attr, 1180 &dev_attr_button2_rawimg.attr, 1181 &dev_attr_button3_rawimg.attr, 1182 &dev_attr_button4_rawimg.attr, 1183 &dev_attr_button5_rawimg.attr, 1184 &dev_attr_button6_rawimg.attr, 1185 &dev_attr_button7_rawimg.attr, 1186 NULL 1187 }; 1188 1189 static struct attribute_group intuos4_led_attr_group = { 1190 .name = "wacom_led", 1191 .attrs = intuos4_led_attrs, 1192 }; 1193 1194 static struct attribute *intuos5_led_attrs[] = { 1195 &dev_attr_status0_luminance.attr, 1196 &dev_attr_status_led0_select.attr, 1197 NULL 1198 }; 1199 1200 static struct attribute_group intuos5_led_attr_group = { 1201 .name = "wacom_led", 1202 .attrs = intuos5_led_attrs, 1203 }; 1204 1205 static struct attribute *generic_led_attrs[] = { 1206 &dev_attr_status0_luminance.attr, 1207 &dev_attr_status_led0_select.attr, 1208 NULL 1209 }; 1210 1211 static struct attribute_group generic_led_attr_group = { 1212 .name = "wacom_led", 1213 .attrs = generic_led_attrs, 1214 }; 1215 1216 struct wacom_sysfs_group_devres { 1217 struct attribute_group *group; 1218 struct kobject *root; 1219 }; 1220 1221 static void wacom_devm_sysfs_group_release(struct device *dev, void *res) 1222 { 1223 struct wacom_sysfs_group_devres *devres = res; 1224 struct kobject *kobj = devres->root; 1225 1226 dev_dbg(dev, "%s: dropping reference to %s\n", 1227 __func__, devres->group->name); 1228 sysfs_remove_group(kobj, devres->group); 1229 } 1230 1231 static int __wacom_devm_sysfs_create_group(struct wacom *wacom, 1232 struct kobject *root, 1233 struct attribute_group *group) 1234 { 1235 struct wacom_sysfs_group_devres *devres; 1236 int error; 1237 1238 devres = devres_alloc(wacom_devm_sysfs_group_release, 1239 sizeof(struct wacom_sysfs_group_devres), 1240 GFP_KERNEL); 1241 if (!devres) 1242 return -ENOMEM; 1243 1244 devres->group = group; 1245 devres->root = root; 1246 1247 error = sysfs_create_group(devres->root, group); 1248 if (error) { 1249 devres_free(devres); 1250 return error; 1251 } 1252 1253 devres_add(&wacom->hdev->dev, devres); 1254 1255 return 0; 1256 } 1257 1258 static int wacom_devm_sysfs_create_group(struct wacom *wacom, 1259 struct attribute_group *group) 1260 { 1261 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj, 1262 group); 1263 } 1264 1265 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led) 1266 { 1267 struct wacom *wacom = led->wacom; 1268 1269 if (wacom->led.max_hlv) 1270 return led->hlv * LED_FULL / wacom->led.max_hlv; 1271 1272 if (wacom->led.max_llv) 1273 return led->llv * LED_FULL / wacom->led.max_llv; 1274 1275 /* device doesn't support brightness tuning */ 1276 return LED_FULL; 1277 } 1278 1279 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev) 1280 { 1281 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev); 1282 struct wacom *wacom = led->wacom; 1283 1284 if (wacom->led.groups[led->group].select != led->id) 1285 return LED_OFF; 1286 1287 return wacom_leds_brightness_get(led); 1288 } 1289 1290 static int wacom_led_brightness_set(struct led_classdev *cdev, 1291 enum led_brightness brightness) 1292 { 1293 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev); 1294 struct wacom *wacom = led->wacom; 1295 int error; 1296 1297 mutex_lock(&wacom->lock); 1298 1299 if (!wacom->led.groups || (brightness == LED_OFF && 1300 wacom->led.groups[led->group].select != led->id)) { 1301 error = 0; 1302 goto out; 1303 } 1304 1305 led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL; 1306 led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL; 1307 1308 wacom->led.groups[led->group].select = led->id; 1309 1310 error = wacom_led_control(wacom); 1311 1312 out: 1313 mutex_unlock(&wacom->lock); 1314 1315 return error; 1316 } 1317 1318 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev, 1319 enum led_brightness brightness) 1320 { 1321 } 1322 1323 static int wacom_led_register_one(struct device *dev, struct wacom *wacom, 1324 struct wacom_led *led, unsigned int group, 1325 unsigned int id, bool read_only) 1326 { 1327 int error; 1328 char *name; 1329 1330 name = devm_kasprintf(dev, GFP_KERNEL, 1331 "%s::wacom-%d.%d", 1332 dev_name(dev), 1333 group, 1334 id); 1335 if (!name) 1336 return -ENOMEM; 1337 1338 if (!read_only) { 1339 led->trigger.name = name; 1340 error = devm_led_trigger_register(dev, &led->trigger); 1341 if (error) { 1342 hid_err(wacom->hdev, 1343 "failed to register LED trigger %s: %d\n", 1344 led->cdev.name, error); 1345 return error; 1346 } 1347 } 1348 1349 led->group = group; 1350 led->id = id; 1351 led->wacom = wacom; 1352 led->llv = wacom->led.llv; 1353 led->hlv = wacom->led.hlv; 1354 led->cdev.name = name; 1355 led->cdev.max_brightness = LED_FULL; 1356 led->cdev.flags = LED_HW_PLUGGABLE; 1357 led->cdev.brightness_get = __wacom_led_brightness_get; 1358 if (!read_only) { 1359 led->cdev.brightness_set_blocking = wacom_led_brightness_set; 1360 led->cdev.default_trigger = led->cdev.name; 1361 } else { 1362 led->cdev.brightness_set = wacom_led_readonly_brightness_set; 1363 } 1364 1365 error = devm_led_classdev_register(dev, &led->cdev); 1366 if (error) { 1367 hid_err(wacom->hdev, 1368 "failed to register LED %s: %d\n", 1369 led->cdev.name, error); 1370 led->cdev.name = NULL; 1371 return error; 1372 } 1373 1374 return 0; 1375 } 1376 1377 static void wacom_led_groups_release_one(void *data) 1378 { 1379 struct wacom_group_leds *group = data; 1380 1381 devres_release_group(group->dev, group); 1382 } 1383 1384 static int wacom_led_groups_alloc_and_register_one(struct device *dev, 1385 struct wacom *wacom, 1386 int group_id, int count, 1387 bool read_only) 1388 { 1389 struct wacom_led *leds; 1390 int i, error; 1391 1392 if (group_id >= wacom->led.count || count <= 0) 1393 return -EINVAL; 1394 1395 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL)) 1396 return -ENOMEM; 1397 1398 leds = devm_kcalloc(dev, count, sizeof(struct wacom_led), GFP_KERNEL); 1399 if (!leds) { 1400 error = -ENOMEM; 1401 goto err; 1402 } 1403 1404 wacom->led.groups[group_id].leds = leds; 1405 wacom->led.groups[group_id].count = count; 1406 1407 for (i = 0; i < count; i++) { 1408 error = wacom_led_register_one(dev, wacom, &leds[i], 1409 group_id, i, read_only); 1410 if (error) 1411 goto err; 1412 } 1413 1414 wacom->led.groups[group_id].dev = dev; 1415 1416 devres_close_group(dev, &wacom->led.groups[group_id]); 1417 1418 /* 1419 * There is a bug (?) in devm_led_classdev_register() in which its 1420 * increments the refcount of the parent. If the parent is an input 1421 * device, that means the ref count never reaches 0 when 1422 * devm_input_device_release() gets called. 1423 * This means that the LEDs are still there after disconnect. 1424 * Manually force the release of the group so that the leds are released 1425 * once we are done using them. 1426 */ 1427 error = devm_add_action_or_reset(&wacom->hdev->dev, 1428 wacom_led_groups_release_one, 1429 &wacom->led.groups[group_id]); 1430 if (error) 1431 return error; 1432 1433 return 0; 1434 1435 err: 1436 devres_release_group(dev, &wacom->led.groups[group_id]); 1437 return error; 1438 } 1439 1440 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id, 1441 unsigned int id) 1442 { 1443 struct wacom_group_leds *group; 1444 1445 if (group_id >= wacom->led.count) 1446 return NULL; 1447 1448 group = &wacom->led.groups[group_id]; 1449 1450 if (!group->leds) 1451 return NULL; 1452 1453 id %= group->count; 1454 1455 return &group->leds[id]; 1456 } 1457 1458 /** 1459 * wacom_led_next: gives the next available led with a wacom trigger. 1460 * 1461 * returns the next available struct wacom_led which has its default trigger 1462 * or the current one if none is available. 1463 */ 1464 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur) 1465 { 1466 struct wacom_led *next_led; 1467 int group, next; 1468 1469 if (!wacom || !cur) 1470 return NULL; 1471 1472 group = cur->group; 1473 next = cur->id; 1474 1475 do { 1476 next_led = wacom_led_find(wacom, group, ++next); 1477 if (!next_led || next_led == cur) 1478 return next_led; 1479 } while (next_led->cdev.trigger != &next_led->trigger); 1480 1481 return next_led; 1482 } 1483 1484 static void wacom_led_groups_release(void *data) 1485 { 1486 struct wacom *wacom = data; 1487 1488 wacom->led.groups = NULL; 1489 wacom->led.count = 0; 1490 } 1491 1492 static int wacom_led_groups_allocate(struct wacom *wacom, int count) 1493 { 1494 struct device *dev = &wacom->hdev->dev; 1495 struct wacom_group_leds *groups; 1496 int error; 1497 1498 groups = devm_kcalloc(dev, count, sizeof(struct wacom_group_leds), 1499 GFP_KERNEL); 1500 if (!groups) 1501 return -ENOMEM; 1502 1503 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom); 1504 if (error) 1505 return error; 1506 1507 wacom->led.groups = groups; 1508 wacom->led.count = count; 1509 1510 return 0; 1511 } 1512 1513 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count, 1514 int led_per_group, bool read_only) 1515 { 1516 struct device *dev; 1517 int i, error; 1518 1519 if (!wacom->wacom_wac.pad_input) 1520 return -EINVAL; 1521 1522 dev = &wacom->wacom_wac.pad_input->dev; 1523 1524 error = wacom_led_groups_allocate(wacom, group_count); 1525 if (error) 1526 return error; 1527 1528 for (i = 0; i < group_count; i++) { 1529 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i, 1530 led_per_group, 1531 read_only); 1532 if (error) 1533 return error; 1534 } 1535 1536 return 0; 1537 } 1538 1539 int wacom_initialize_leds(struct wacom *wacom) 1540 { 1541 int error; 1542 1543 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD)) 1544 return 0; 1545 1546 /* Initialize default values */ 1547 switch (wacom->wacom_wac.features.type) { 1548 case HID_GENERIC: 1549 if (!wacom->generic_has_leds) 1550 return 0; 1551 wacom->led.llv = 100; 1552 wacom->led.max_llv = 100; 1553 1554 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1555 if (error) { 1556 hid_err(wacom->hdev, 1557 "cannot create leds err: %d\n", error); 1558 return error; 1559 } 1560 1561 error = wacom_devm_sysfs_create_group(wacom, 1562 &generic_led_attr_group); 1563 break; 1564 1565 case INTUOS4S: 1566 case INTUOS4: 1567 case INTUOS4WL: 1568 case INTUOS4L: 1569 wacom->led.llv = 10; 1570 wacom->led.hlv = 20; 1571 wacom->led.max_llv = 127; 1572 wacom->led.max_hlv = 127; 1573 wacom->led.img_lum = 10; 1574 1575 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1576 if (error) { 1577 hid_err(wacom->hdev, 1578 "cannot create leds err: %d\n", error); 1579 return error; 1580 } 1581 1582 error = wacom_devm_sysfs_create_group(wacom, 1583 &intuos4_led_attr_group); 1584 break; 1585 1586 case WACOM_24HD: 1587 case WACOM_21UX2: 1588 wacom->led.llv = 0; 1589 wacom->led.hlv = 0; 1590 wacom->led.img_lum = 0; 1591 1592 error = wacom_leds_alloc_and_register(wacom, 2, 4, false); 1593 if (error) { 1594 hid_err(wacom->hdev, 1595 "cannot create leds err: %d\n", error); 1596 return error; 1597 } 1598 1599 error = wacom_devm_sysfs_create_group(wacom, 1600 &cintiq_led_attr_group); 1601 break; 1602 1603 case INTUOS5S: 1604 case INTUOS5: 1605 case INTUOS5L: 1606 case INTUOSPS: 1607 case INTUOSPM: 1608 case INTUOSPL: 1609 wacom->led.llv = 32; 1610 wacom->led.max_llv = 96; 1611 1612 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1613 if (error) { 1614 hid_err(wacom->hdev, 1615 "cannot create leds err: %d\n", error); 1616 return error; 1617 } 1618 1619 error = wacom_devm_sysfs_create_group(wacom, 1620 &intuos5_led_attr_group); 1621 break; 1622 1623 case INTUOSP2_BT: 1624 wacom->led.llv = 50; 1625 wacom->led.max_llv = 100; 1626 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1627 if (error) { 1628 hid_err(wacom->hdev, 1629 "cannot create leds err: %d\n", error); 1630 return error; 1631 } 1632 return 0; 1633 1634 case REMOTE: 1635 wacom->led.llv = 255; 1636 wacom->led.max_llv = 255; 1637 error = wacom_led_groups_allocate(wacom, 5); 1638 if (error) { 1639 hid_err(wacom->hdev, 1640 "cannot create leds err: %d\n", error); 1641 return error; 1642 } 1643 return 0; 1644 1645 default: 1646 return 0; 1647 } 1648 1649 if (error) { 1650 hid_err(wacom->hdev, 1651 "cannot create sysfs group err: %d\n", error); 1652 return error; 1653 } 1654 1655 return 0; 1656 } 1657 1658 static void wacom_init_work(struct work_struct *work) 1659 { 1660 struct wacom *wacom = container_of(work, struct wacom, init_work.work); 1661 1662 _wacom_query_tablet_data(wacom); 1663 wacom_led_control(wacom); 1664 } 1665 1666 static void wacom_query_tablet_data(struct wacom *wacom) 1667 { 1668 schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000)); 1669 } 1670 1671 static enum power_supply_property wacom_battery_props[] = { 1672 POWER_SUPPLY_PROP_MODEL_NAME, 1673 POWER_SUPPLY_PROP_PRESENT, 1674 POWER_SUPPLY_PROP_STATUS, 1675 POWER_SUPPLY_PROP_SCOPE, 1676 POWER_SUPPLY_PROP_CAPACITY 1677 }; 1678 1679 static int wacom_battery_get_property(struct power_supply *psy, 1680 enum power_supply_property psp, 1681 union power_supply_propval *val) 1682 { 1683 struct wacom_battery *battery = power_supply_get_drvdata(psy); 1684 int ret = 0; 1685 1686 switch (psp) { 1687 case POWER_SUPPLY_PROP_MODEL_NAME: 1688 val->strval = battery->wacom->wacom_wac.name; 1689 break; 1690 case POWER_SUPPLY_PROP_PRESENT: 1691 val->intval = battery->bat_connected; 1692 break; 1693 case POWER_SUPPLY_PROP_SCOPE: 1694 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 1695 break; 1696 case POWER_SUPPLY_PROP_CAPACITY: 1697 val->intval = battery->battery_capacity; 1698 break; 1699 case POWER_SUPPLY_PROP_STATUS: 1700 if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO) 1701 val->intval = battery->bat_status; 1702 else if (battery->bat_charging) 1703 val->intval = POWER_SUPPLY_STATUS_CHARGING; 1704 else if (battery->battery_capacity == 100 && 1705 battery->ps_connected) 1706 val->intval = POWER_SUPPLY_STATUS_FULL; 1707 else if (battery->ps_connected) 1708 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; 1709 else 1710 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 1711 break; 1712 default: 1713 ret = -EINVAL; 1714 break; 1715 } 1716 1717 return ret; 1718 } 1719 1720 static int __wacom_initialize_battery(struct wacom *wacom, 1721 struct wacom_battery *battery) 1722 { 1723 static atomic_t battery_no = ATOMIC_INIT(0); 1724 struct device *dev = &wacom->hdev->dev; 1725 struct power_supply_config psy_cfg = { .drv_data = battery, }; 1726 struct power_supply *ps_bat; 1727 struct power_supply_desc *bat_desc = &battery->bat_desc; 1728 unsigned long n; 1729 int error; 1730 1731 if (!devres_open_group(dev, bat_desc, GFP_KERNEL)) 1732 return -ENOMEM; 1733 1734 battery->wacom = wacom; 1735 1736 n = atomic_inc_return(&battery_no) - 1; 1737 1738 bat_desc->properties = wacom_battery_props; 1739 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props); 1740 bat_desc->get_property = wacom_battery_get_property; 1741 sprintf(battery->bat_name, "wacom_battery_%ld", n); 1742 bat_desc->name = battery->bat_name; 1743 bat_desc->type = POWER_SUPPLY_TYPE_USB; 1744 bat_desc->use_for_apm = 0; 1745 1746 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg); 1747 if (IS_ERR(ps_bat)) { 1748 error = PTR_ERR(ps_bat); 1749 goto err; 1750 } 1751 1752 power_supply_powers(ps_bat, &wacom->hdev->dev); 1753 1754 battery->battery = ps_bat; 1755 1756 devres_close_group(dev, bat_desc); 1757 return 0; 1758 1759 err: 1760 devres_release_group(dev, bat_desc); 1761 return error; 1762 } 1763 1764 static int wacom_initialize_battery(struct wacom *wacom) 1765 { 1766 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) 1767 return __wacom_initialize_battery(wacom, &wacom->battery); 1768 1769 return 0; 1770 } 1771 1772 static void wacom_destroy_battery(struct wacom *wacom) 1773 { 1774 if (wacom->battery.battery) { 1775 devres_release_group(&wacom->hdev->dev, 1776 &wacom->battery.bat_desc); 1777 wacom->battery.battery = NULL; 1778 } 1779 } 1780 1781 static ssize_t wacom_show_speed(struct device *dev, 1782 struct device_attribute 1783 *attr, char *buf) 1784 { 1785 struct hid_device *hdev = to_hid_device(dev); 1786 struct wacom *wacom = hid_get_drvdata(hdev); 1787 1788 return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed); 1789 } 1790 1791 static ssize_t wacom_store_speed(struct device *dev, 1792 struct device_attribute *attr, 1793 const char *buf, size_t count) 1794 { 1795 struct hid_device *hdev = to_hid_device(dev); 1796 struct wacom *wacom = hid_get_drvdata(hdev); 1797 u8 new_speed; 1798 1799 if (kstrtou8(buf, 0, &new_speed)) 1800 return -EINVAL; 1801 1802 if (new_speed != 0 && new_speed != 1) 1803 return -EINVAL; 1804 1805 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features); 1806 1807 return count; 1808 } 1809 1810 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM, 1811 wacom_show_speed, wacom_store_speed); 1812 1813 1814 static ssize_t wacom_show_remote_mode(struct kobject *kobj, 1815 struct kobj_attribute *kattr, 1816 char *buf, int index) 1817 { 1818 struct device *dev = kobj_to_dev(kobj->parent); 1819 struct hid_device *hdev = to_hid_device(dev); 1820 struct wacom *wacom = hid_get_drvdata(hdev); 1821 u8 mode; 1822 1823 mode = wacom->led.groups[index].select; 1824 return sprintf(buf, "%d\n", mode < 3 ? mode : -1); 1825 } 1826 1827 #define DEVICE_EKR_ATTR_GROUP(SET_ID) \ 1828 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \ 1829 struct kobj_attribute *kattr, char *buf) \ 1830 { \ 1831 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \ 1832 } \ 1833 static struct kobj_attribute remote##SET_ID##_mode_attr = { \ 1834 .attr = {.name = "remote_mode", \ 1835 .mode = DEV_ATTR_RO_PERM}, \ 1836 .show = wacom_show_remote##SET_ID##_mode, \ 1837 }; \ 1838 static struct attribute *remote##SET_ID##_serial_attrs[] = { \ 1839 &remote##SET_ID##_mode_attr.attr, \ 1840 NULL \ 1841 }; \ 1842 static struct attribute_group remote##SET_ID##_serial_group = { \ 1843 .name = NULL, \ 1844 .attrs = remote##SET_ID##_serial_attrs, \ 1845 } 1846 1847 DEVICE_EKR_ATTR_GROUP(0); 1848 DEVICE_EKR_ATTR_GROUP(1); 1849 DEVICE_EKR_ATTR_GROUP(2); 1850 DEVICE_EKR_ATTR_GROUP(3); 1851 DEVICE_EKR_ATTR_GROUP(4); 1852 1853 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial, 1854 int index) 1855 { 1856 int error = 0; 1857 struct wacom_remote *remote = wacom->remote; 1858 1859 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev, 1860 GFP_KERNEL, 1861 "%d", serial); 1862 if (!remote->remotes[index].group.name) 1863 return -ENOMEM; 1864 1865 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir, 1866 &remote->remotes[index].group); 1867 if (error) { 1868 remote->remotes[index].group.name = NULL; 1869 hid_err(wacom->hdev, 1870 "cannot create sysfs group err: %d\n", error); 1871 return error; 1872 } 1873 1874 return 0; 1875 } 1876 1877 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector) 1878 { 1879 const size_t buf_size = 2; 1880 unsigned char *buf; 1881 int retval; 1882 1883 buf = kzalloc(buf_size, GFP_KERNEL); 1884 if (!buf) 1885 return -ENOMEM; 1886 1887 buf[0] = WAC_CMD_DELETE_PAIRING; 1888 buf[1] = selector; 1889 1890 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf, 1891 buf_size, WAC_CMD_RETRIES); 1892 kfree(buf); 1893 1894 return retval; 1895 } 1896 1897 static ssize_t wacom_store_unpair_remote(struct kobject *kobj, 1898 struct kobj_attribute *attr, 1899 const char *buf, size_t count) 1900 { 1901 unsigned char selector = 0; 1902 struct device *dev = kobj_to_dev(kobj->parent); 1903 struct hid_device *hdev = to_hid_device(dev); 1904 struct wacom *wacom = hid_get_drvdata(hdev); 1905 int err; 1906 1907 if (!strncmp(buf, "*\n", 2)) { 1908 selector = WAC_CMD_UNPAIR_ALL; 1909 } else { 1910 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n", 1911 buf); 1912 return -1; 1913 } 1914 1915 mutex_lock(&wacom->lock); 1916 1917 err = wacom_cmd_unpair_remote(wacom, selector); 1918 mutex_unlock(&wacom->lock); 1919 1920 return err < 0 ? err : count; 1921 } 1922 1923 static struct kobj_attribute unpair_remote_attr = { 1924 .attr = {.name = "unpair_remote", .mode = 0200}, 1925 .store = wacom_store_unpair_remote, 1926 }; 1927 1928 static const struct attribute *remote_unpair_attrs[] = { 1929 &unpair_remote_attr.attr, 1930 NULL 1931 }; 1932 1933 static void wacom_remotes_destroy(void *data) 1934 { 1935 struct wacom *wacom = data; 1936 struct wacom_remote *remote = wacom->remote; 1937 1938 if (!remote) 1939 return; 1940 1941 kobject_put(remote->remote_dir); 1942 kfifo_free(&remote->remote_fifo); 1943 wacom->remote = NULL; 1944 } 1945 1946 static int wacom_initialize_remotes(struct wacom *wacom) 1947 { 1948 int error = 0; 1949 struct wacom_remote *remote; 1950 int i; 1951 1952 if (wacom->wacom_wac.features.type != REMOTE) 1953 return 0; 1954 1955 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote), 1956 GFP_KERNEL); 1957 if (!remote) 1958 return -ENOMEM; 1959 1960 wacom->remote = remote; 1961 1962 spin_lock_init(&remote->remote_lock); 1963 1964 error = kfifo_alloc(&remote->remote_fifo, 1965 5 * sizeof(struct wacom_remote_data), 1966 GFP_KERNEL); 1967 if (error) { 1968 hid_err(wacom->hdev, "failed allocating remote_fifo\n"); 1969 return -ENOMEM; 1970 } 1971 1972 remote->remotes[0].group = remote0_serial_group; 1973 remote->remotes[1].group = remote1_serial_group; 1974 remote->remotes[2].group = remote2_serial_group; 1975 remote->remotes[3].group = remote3_serial_group; 1976 remote->remotes[4].group = remote4_serial_group; 1977 1978 remote->remote_dir = kobject_create_and_add("wacom_remote", 1979 &wacom->hdev->dev.kobj); 1980 if (!remote->remote_dir) 1981 return -ENOMEM; 1982 1983 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs); 1984 1985 if (error) { 1986 hid_err(wacom->hdev, 1987 "cannot create sysfs group err: %d\n", error); 1988 return error; 1989 } 1990 1991 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 1992 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN; 1993 remote->remotes[i].serial = 0; 1994 } 1995 1996 error = devm_add_action_or_reset(&wacom->hdev->dev, 1997 wacom_remotes_destroy, wacom); 1998 if (error) 1999 return error; 2000 2001 return 0; 2002 } 2003 2004 static struct input_dev *wacom_allocate_input(struct wacom *wacom) 2005 { 2006 struct input_dev *input_dev; 2007 struct hid_device *hdev = wacom->hdev; 2008 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 2009 2010 input_dev = devm_input_allocate_device(&hdev->dev); 2011 if (!input_dev) 2012 return NULL; 2013 2014 input_dev->name = wacom_wac->features.name; 2015 input_dev->phys = hdev->phys; 2016 input_dev->dev.parent = &hdev->dev; 2017 input_dev->open = wacom_open; 2018 input_dev->close = wacom_close; 2019 input_dev->uniq = hdev->uniq; 2020 input_dev->id.bustype = hdev->bus; 2021 input_dev->id.vendor = hdev->vendor; 2022 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product; 2023 input_dev->id.version = hdev->version; 2024 input_set_drvdata(input_dev, wacom); 2025 2026 return input_dev; 2027 } 2028 2029 static int wacom_allocate_inputs(struct wacom *wacom) 2030 { 2031 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 2032 2033 wacom_wac->pen_input = wacom_allocate_input(wacom); 2034 wacom_wac->touch_input = wacom_allocate_input(wacom); 2035 wacom_wac->pad_input = wacom_allocate_input(wacom); 2036 if (!wacom_wac->pen_input || 2037 !wacom_wac->touch_input || 2038 !wacom_wac->pad_input) 2039 return -ENOMEM; 2040 2041 wacom_wac->pen_input->name = wacom_wac->pen_name; 2042 wacom_wac->touch_input->name = wacom_wac->touch_name; 2043 wacom_wac->pad_input->name = wacom_wac->pad_name; 2044 2045 return 0; 2046 } 2047 2048 static int wacom_register_inputs(struct wacom *wacom) 2049 { 2050 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev; 2051 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 2052 int error = 0; 2053 2054 pen_input_dev = wacom_wac->pen_input; 2055 touch_input_dev = wacom_wac->touch_input; 2056 pad_input_dev = wacom_wac->pad_input; 2057 2058 if (!pen_input_dev || !touch_input_dev || !pad_input_dev) 2059 return -EINVAL; 2060 2061 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac); 2062 if (error) { 2063 /* no pen in use on this interface */ 2064 input_free_device(pen_input_dev); 2065 wacom_wac->pen_input = NULL; 2066 pen_input_dev = NULL; 2067 } else { 2068 error = input_register_device(pen_input_dev); 2069 if (error) 2070 goto fail; 2071 } 2072 2073 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac); 2074 if (error) { 2075 /* no touch in use on this interface */ 2076 input_free_device(touch_input_dev); 2077 wacom_wac->touch_input = NULL; 2078 touch_input_dev = NULL; 2079 } else { 2080 error = input_register_device(touch_input_dev); 2081 if (error) 2082 goto fail; 2083 } 2084 2085 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac); 2086 if (error) { 2087 /* no pad in use on this interface */ 2088 input_free_device(pad_input_dev); 2089 wacom_wac->pad_input = NULL; 2090 pad_input_dev = NULL; 2091 } else { 2092 error = input_register_device(pad_input_dev); 2093 if (error) 2094 goto fail; 2095 } 2096 2097 return 0; 2098 2099 fail: 2100 wacom_wac->pad_input = NULL; 2101 wacom_wac->touch_input = NULL; 2102 wacom_wac->pen_input = NULL; 2103 return error; 2104 } 2105 2106 /* 2107 * Not all devices report physical dimensions from HID. 2108 * Compute the default from hardcoded logical dimension 2109 * and resolution before driver overwrites them. 2110 */ 2111 static void wacom_set_default_phy(struct wacom_features *features) 2112 { 2113 if (features->x_resolution) { 2114 features->x_phy = (features->x_max * 100) / 2115 features->x_resolution; 2116 features->y_phy = (features->y_max * 100) / 2117 features->y_resolution; 2118 } 2119 } 2120 2121 static void wacom_calculate_res(struct wacom_features *features) 2122 { 2123 /* set unit to "100th of a mm" for devices not reported by HID */ 2124 if (!features->unit) { 2125 features->unit = 0x11; 2126 features->unitExpo = -3; 2127 } 2128 2129 features->x_resolution = wacom_calc_hid_res(features->x_max, 2130 features->x_phy, 2131 features->unit, 2132 features->unitExpo); 2133 features->y_resolution = wacom_calc_hid_res(features->y_max, 2134 features->y_phy, 2135 features->unit, 2136 features->unitExpo); 2137 } 2138 2139 void wacom_battery_work(struct work_struct *work) 2140 { 2141 struct wacom *wacom = container_of(work, struct wacom, battery_work); 2142 2143 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && 2144 !wacom->battery.battery) { 2145 wacom_initialize_battery(wacom); 2146 } 2147 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && 2148 wacom->battery.battery) { 2149 wacom_destroy_battery(wacom); 2150 } 2151 } 2152 2153 static size_t wacom_compute_pktlen(struct hid_device *hdev) 2154 { 2155 struct hid_report_enum *report_enum; 2156 struct hid_report *report; 2157 size_t size = 0; 2158 2159 report_enum = hdev->report_enum + HID_INPUT_REPORT; 2160 2161 list_for_each_entry(report, &report_enum->report_list, list) { 2162 size_t report_size = hid_report_len(report); 2163 if (report_size > size) 2164 size = report_size; 2165 } 2166 2167 return size; 2168 } 2169 2170 static void wacom_update_name(struct wacom *wacom, const char *suffix) 2171 { 2172 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2173 struct wacom_features *features = &wacom_wac->features; 2174 char name[WACOM_NAME_MAX]; 2175 2176 /* Generic devices name unspecified */ 2177 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) { 2178 char *product_name = wacom->hdev->name; 2179 2180 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) { 2181 struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent); 2182 struct usb_device *dev = interface_to_usbdev(intf); 2183 product_name = dev->product; 2184 } 2185 2186 if (wacom->hdev->bus == BUS_I2C) { 2187 snprintf(name, sizeof(name), "%s %X", 2188 features->name, wacom->hdev->product); 2189 } else if (strstr(product_name, "Wacom") || 2190 strstr(product_name, "wacom") || 2191 strstr(product_name, "WACOM")) { 2192 strlcpy(name, product_name, sizeof(name)); 2193 } else { 2194 snprintf(name, sizeof(name), "Wacom %s", product_name); 2195 } 2196 2197 /* strip out excess whitespaces */ 2198 while (1) { 2199 char *gap = strstr(name, " "); 2200 if (gap == NULL) 2201 break; 2202 /* shift everything including the terminator */ 2203 memmove(gap, gap+1, strlen(gap)); 2204 } 2205 2206 /* get rid of trailing whitespace */ 2207 if (name[strlen(name)-1] == ' ') 2208 name[strlen(name)-1] = '\0'; 2209 } else { 2210 strlcpy(name, features->name, sizeof(name)); 2211 } 2212 2213 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s", 2214 name, suffix); 2215 2216 /* Append the device type to the name */ 2217 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name), 2218 "%s%s Pen", name, suffix); 2219 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name), 2220 "%s%s Finger", name, suffix); 2221 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name), 2222 "%s%s Pad", name, suffix); 2223 } 2224 2225 static void wacom_release_resources(struct wacom *wacom) 2226 { 2227 struct hid_device *hdev = wacom->hdev; 2228 2229 if (!wacom->resources) 2230 return; 2231 2232 devres_release_group(&hdev->dev, wacom); 2233 2234 wacom->resources = false; 2235 2236 wacom->wacom_wac.pen_input = NULL; 2237 wacom->wacom_wac.touch_input = NULL; 2238 wacom->wacom_wac.pad_input = NULL; 2239 } 2240 2241 static void wacom_set_shared_values(struct wacom_wac *wacom_wac) 2242 { 2243 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) { 2244 wacom_wac->shared->type = wacom_wac->features.type; 2245 wacom_wac->shared->touch_input = wacom_wac->touch_input; 2246 } 2247 2248 if (wacom_wac->has_mute_touch_switch) { 2249 wacom_wac->shared->has_mute_touch_switch = true; 2250 wacom_wac->shared->is_touch_on = true; 2251 } 2252 2253 if (wacom_wac->shared->has_mute_touch_switch && 2254 wacom_wac->shared->touch_input) { 2255 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit); 2256 input_set_capability(wacom_wac->shared->touch_input, EV_SW, 2257 SW_MUTE_DEVICE); 2258 } 2259 } 2260 2261 static int wacom_parse_and_register(struct wacom *wacom, bool wireless) 2262 { 2263 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2264 struct wacom_features *features = &wacom_wac->features; 2265 struct hid_device *hdev = wacom->hdev; 2266 int error; 2267 unsigned int connect_mask = HID_CONNECT_HIDRAW; 2268 2269 features->pktlen = wacom_compute_pktlen(hdev); 2270 if (features->pktlen > WACOM_PKGLEN_MAX) 2271 return -EINVAL; 2272 2273 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL)) 2274 return -ENOMEM; 2275 2276 wacom->resources = true; 2277 2278 error = wacom_allocate_inputs(wacom); 2279 if (error) 2280 goto fail; 2281 2282 /* 2283 * Bamboo Pad has a generic hid handling for the Pen, and we switch it 2284 * into debug mode for the touch part. 2285 * We ignore the other interfaces. 2286 */ 2287 if (features->type == BAMBOO_PAD) { 2288 if (features->pktlen == WACOM_PKGLEN_PENABLED) { 2289 features->type = HID_GENERIC; 2290 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) && 2291 (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) { 2292 error = -ENODEV; 2293 goto fail; 2294 } 2295 } 2296 2297 /* set the default size in case we do not get them from hid */ 2298 wacom_set_default_phy(features); 2299 2300 /* Retrieve the physical and logical size for touch devices */ 2301 wacom_retrieve_hid_descriptor(hdev, features); 2302 wacom_setup_device_quirks(wacom); 2303 2304 if (features->device_type == WACOM_DEVICETYPE_NONE && 2305 features->type != WIRELESS) { 2306 error = features->type == HID_GENERIC ? -ENODEV : 0; 2307 2308 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.", 2309 hdev->name, 2310 error ? "Ignoring" : "Assuming pen"); 2311 2312 if (error) 2313 goto fail; 2314 2315 features->device_type |= WACOM_DEVICETYPE_PEN; 2316 } 2317 2318 wacom_calculate_res(features); 2319 2320 wacom_update_name(wacom, wireless ? " (WL)" : ""); 2321 2322 /* pen only Bamboo neither support touch nor pad */ 2323 if ((features->type == BAMBOO_PEN) && 2324 ((features->device_type & WACOM_DEVICETYPE_TOUCH) || 2325 (features->device_type & WACOM_DEVICETYPE_PAD))) { 2326 error = -ENODEV; 2327 goto fail; 2328 } 2329 2330 error = wacom_add_shared_data(hdev); 2331 if (error) 2332 goto fail; 2333 2334 if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) && 2335 (features->quirks & WACOM_QUIRK_BATTERY)) { 2336 error = wacom_initialize_battery(wacom); 2337 if (error) 2338 goto fail; 2339 } 2340 2341 error = wacom_register_inputs(wacom); 2342 if (error) 2343 goto fail; 2344 2345 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) { 2346 error = wacom_initialize_leds(wacom); 2347 if (error) 2348 goto fail; 2349 2350 error = wacom_initialize_remotes(wacom); 2351 if (error) 2352 goto fail; 2353 } 2354 2355 if (features->type == HID_GENERIC) 2356 connect_mask |= HID_CONNECT_DRIVER; 2357 2358 /* Regular HID work starts now */ 2359 error = hid_hw_start(hdev, connect_mask); 2360 if (error) { 2361 hid_err(hdev, "hw start failed\n"); 2362 goto fail; 2363 } 2364 2365 if (!wireless) { 2366 /* Note that if query fails it is not a hard failure */ 2367 wacom_query_tablet_data(wacom); 2368 } 2369 2370 /* touch only Bamboo doesn't support pen */ 2371 if ((features->type == BAMBOO_TOUCH) && 2372 (features->device_type & WACOM_DEVICETYPE_PEN)) { 2373 cancel_delayed_work_sync(&wacom->init_work); 2374 _wacom_query_tablet_data(wacom); 2375 error = -ENODEV; 2376 goto fail_quirks; 2377 } 2378 2379 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) 2380 error = hid_hw_open(hdev); 2381 2382 wacom_set_shared_values(wacom_wac); 2383 devres_close_group(&hdev->dev, wacom); 2384 2385 return 0; 2386 2387 fail_quirks: 2388 hid_hw_stop(hdev); 2389 fail: 2390 wacom_release_resources(wacom); 2391 return error; 2392 } 2393 2394 static void wacom_wireless_work(struct work_struct *work) 2395 { 2396 struct wacom *wacom = container_of(work, struct wacom, wireless_work); 2397 struct usb_device *usbdev = wacom->usbdev; 2398 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2399 struct hid_device *hdev1, *hdev2; 2400 struct wacom *wacom1, *wacom2; 2401 struct wacom_wac *wacom_wac1, *wacom_wac2; 2402 int error; 2403 2404 /* 2405 * Regardless if this is a disconnect or a new tablet, 2406 * remove any existing input and battery devices. 2407 */ 2408 2409 wacom_destroy_battery(wacom); 2410 2411 /* Stylus interface */ 2412 hdev1 = usb_get_intfdata(usbdev->config->interface[1]); 2413 wacom1 = hid_get_drvdata(hdev1); 2414 wacom_wac1 = &(wacom1->wacom_wac); 2415 wacom_release_resources(wacom1); 2416 2417 /* Touch interface */ 2418 hdev2 = usb_get_intfdata(usbdev->config->interface[2]); 2419 wacom2 = hid_get_drvdata(hdev2); 2420 wacom_wac2 = &(wacom2->wacom_wac); 2421 wacom_release_resources(wacom2); 2422 2423 if (wacom_wac->pid == 0) { 2424 hid_info(wacom->hdev, "wireless tablet disconnected\n"); 2425 } else { 2426 const struct hid_device_id *id = wacom_ids; 2427 2428 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n", 2429 wacom_wac->pid); 2430 2431 while (id->bus) { 2432 if (id->vendor == USB_VENDOR_ID_WACOM && 2433 id->product == wacom_wac->pid) 2434 break; 2435 id++; 2436 } 2437 2438 if (!id->bus) { 2439 hid_info(wacom->hdev, "ignoring unknown PID.\n"); 2440 return; 2441 } 2442 2443 /* Stylus interface */ 2444 wacom_wac1->features = 2445 *((struct wacom_features *)id->driver_data); 2446 2447 wacom_wac1->pid = wacom_wac->pid; 2448 hid_hw_stop(hdev1); 2449 error = wacom_parse_and_register(wacom1, true); 2450 if (error) 2451 goto fail; 2452 2453 /* Touch interface */ 2454 if (wacom_wac1->features.touch_max || 2455 (wacom_wac1->features.type >= INTUOSHT && 2456 wacom_wac1->features.type <= BAMBOO_PT)) { 2457 wacom_wac2->features = 2458 *((struct wacom_features *)id->driver_data); 2459 wacom_wac2->pid = wacom_wac->pid; 2460 hid_hw_stop(hdev2); 2461 error = wacom_parse_and_register(wacom2, true); 2462 if (error) 2463 goto fail; 2464 } 2465 2466 strlcpy(wacom_wac->name, wacom_wac1->name, 2467 sizeof(wacom_wac->name)); 2468 error = wacom_initialize_battery(wacom); 2469 if (error) 2470 goto fail; 2471 } 2472 2473 return; 2474 2475 fail: 2476 wacom_release_resources(wacom1); 2477 wacom_release_resources(wacom2); 2478 return; 2479 } 2480 2481 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index) 2482 { 2483 struct wacom_remote *remote = wacom->remote; 2484 u32 serial = remote->remotes[index].serial; 2485 int i; 2486 unsigned long flags; 2487 2488 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 2489 if (remote->remotes[i].serial == serial) { 2490 2491 spin_lock_irqsave(&remote->remote_lock, flags); 2492 remote->remotes[i].registered = false; 2493 spin_unlock_irqrestore(&remote->remote_lock, flags); 2494 2495 if (remote->remotes[i].battery.battery) 2496 devres_release_group(&wacom->hdev->dev, 2497 &remote->remotes[i].battery.bat_desc); 2498 2499 if (remote->remotes[i].group.name) 2500 devres_release_group(&wacom->hdev->dev, 2501 &remote->remotes[i]); 2502 2503 remote->remotes[i].serial = 0; 2504 remote->remotes[i].group.name = NULL; 2505 remote->remotes[i].battery.battery = NULL; 2506 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN; 2507 } 2508 } 2509 } 2510 2511 static int wacom_remote_create_one(struct wacom *wacom, u32 serial, 2512 unsigned int index) 2513 { 2514 struct wacom_remote *remote = wacom->remote; 2515 struct device *dev = &wacom->hdev->dev; 2516 int error, k; 2517 2518 /* A remote can pair more than once with an EKR, 2519 * check to make sure this serial isn't already paired. 2520 */ 2521 for (k = 0; k < WACOM_MAX_REMOTES; k++) { 2522 if (remote->remotes[k].serial == serial) 2523 break; 2524 } 2525 2526 if (k < WACOM_MAX_REMOTES) { 2527 remote->remotes[index].serial = serial; 2528 return 0; 2529 } 2530 2531 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL)) 2532 return -ENOMEM; 2533 2534 error = wacom_remote_create_attr_group(wacom, serial, index); 2535 if (error) 2536 goto fail; 2537 2538 remote->remotes[index].input = wacom_allocate_input(wacom); 2539 if (!remote->remotes[index].input) { 2540 error = -ENOMEM; 2541 goto fail; 2542 } 2543 remote->remotes[index].input->uniq = remote->remotes[index].group.name; 2544 remote->remotes[index].input->name = wacom->wacom_wac.pad_name; 2545 2546 if (!remote->remotes[index].input->name) { 2547 error = -EINVAL; 2548 goto fail; 2549 } 2550 2551 error = wacom_setup_pad_input_capabilities(remote->remotes[index].input, 2552 &wacom->wacom_wac); 2553 if (error) 2554 goto fail; 2555 2556 remote->remotes[index].serial = serial; 2557 2558 error = input_register_device(remote->remotes[index].input); 2559 if (error) 2560 goto fail; 2561 2562 error = wacom_led_groups_alloc_and_register_one( 2563 &remote->remotes[index].input->dev, 2564 wacom, index, 3, true); 2565 if (error) 2566 goto fail; 2567 2568 remote->remotes[index].registered = true; 2569 2570 devres_close_group(dev, &remote->remotes[index]); 2571 return 0; 2572 2573 fail: 2574 devres_release_group(dev, &remote->remotes[index]); 2575 remote->remotes[index].serial = 0; 2576 return error; 2577 } 2578 2579 static int wacom_remote_attach_battery(struct wacom *wacom, int index) 2580 { 2581 struct wacom_remote *remote = wacom->remote; 2582 int error; 2583 2584 if (!remote->remotes[index].registered) 2585 return 0; 2586 2587 if (remote->remotes[index].battery.battery) 2588 return 0; 2589 2590 if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN) 2591 return 0; 2592 2593 error = __wacom_initialize_battery(wacom, 2594 &wacom->remote->remotes[index].battery); 2595 if (error) 2596 return error; 2597 2598 return 0; 2599 } 2600 2601 static void wacom_remote_work(struct work_struct *work) 2602 { 2603 struct wacom *wacom = container_of(work, struct wacom, remote_work); 2604 struct wacom_remote *remote = wacom->remote; 2605 struct wacom_remote_data data; 2606 unsigned long flags; 2607 unsigned int count; 2608 u32 serial; 2609 int i; 2610 2611 spin_lock_irqsave(&remote->remote_lock, flags); 2612 2613 count = kfifo_out(&remote->remote_fifo, &data, sizeof(data)); 2614 2615 if (count != sizeof(data)) { 2616 hid_err(wacom->hdev, 2617 "workitem triggered without status available\n"); 2618 spin_unlock_irqrestore(&remote->remote_lock, flags); 2619 return; 2620 } 2621 2622 if (!kfifo_is_empty(&remote->remote_fifo)) 2623 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE); 2624 2625 spin_unlock_irqrestore(&remote->remote_lock, flags); 2626 2627 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 2628 serial = data.remote[i].serial; 2629 if (data.remote[i].connected) { 2630 2631 if (remote->remotes[i].serial == serial) { 2632 wacom_remote_attach_battery(wacom, i); 2633 continue; 2634 } 2635 2636 if (remote->remotes[i].serial) 2637 wacom_remote_destroy_one(wacom, i); 2638 2639 wacom_remote_create_one(wacom, serial, i); 2640 2641 } else if (remote->remotes[i].serial) { 2642 wacom_remote_destroy_one(wacom, i); 2643 } 2644 } 2645 } 2646 2647 static void wacom_mode_change_work(struct work_struct *work) 2648 { 2649 struct wacom *wacom = container_of(work, struct wacom, mode_change_work); 2650 struct wacom_shared *shared = wacom->wacom_wac.shared; 2651 struct wacom *wacom1 = NULL; 2652 struct wacom *wacom2 = NULL; 2653 bool is_direct = wacom->wacom_wac.is_direct_mode; 2654 int error = 0; 2655 2656 if (shared->pen) { 2657 wacom1 = hid_get_drvdata(shared->pen); 2658 wacom_release_resources(wacom1); 2659 hid_hw_stop(wacom1->hdev); 2660 wacom1->wacom_wac.has_mode_change = true; 2661 wacom1->wacom_wac.is_direct_mode = is_direct; 2662 } 2663 2664 if (shared->touch) { 2665 wacom2 = hid_get_drvdata(shared->touch); 2666 wacom_release_resources(wacom2); 2667 hid_hw_stop(wacom2->hdev); 2668 wacom2->wacom_wac.has_mode_change = true; 2669 wacom2->wacom_wac.is_direct_mode = is_direct; 2670 } 2671 2672 if (wacom1) { 2673 error = wacom_parse_and_register(wacom1, false); 2674 if (error) 2675 return; 2676 } 2677 2678 if (wacom2) { 2679 error = wacom_parse_and_register(wacom2, false); 2680 if (error) 2681 return; 2682 } 2683 2684 return; 2685 } 2686 2687 static int wacom_probe(struct hid_device *hdev, 2688 const struct hid_device_id *id) 2689 { 2690 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 2691 struct usb_device *dev = interface_to_usbdev(intf); 2692 struct wacom *wacom; 2693 struct wacom_wac *wacom_wac; 2694 struct wacom_features *features; 2695 int error; 2696 2697 if (!id->driver_data) 2698 return -EINVAL; 2699 2700 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; 2701 2702 /* hid-core sets this quirk for the boot interface */ 2703 hdev->quirks &= ~HID_QUIRK_NOGET; 2704 2705 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL); 2706 if (!wacom) 2707 return -ENOMEM; 2708 2709 hid_set_drvdata(hdev, wacom); 2710 wacom->hdev = hdev; 2711 2712 wacom_wac = &wacom->wacom_wac; 2713 wacom_wac->features = *((struct wacom_features *)id->driver_data); 2714 features = &wacom_wac->features; 2715 2716 if (features->check_for_hid_type && features->hid_type != hdev->type) { 2717 error = -ENODEV; 2718 goto fail; 2719 } 2720 2721 error = kfifo_alloc(&wacom_wac->pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL); 2722 if (error) 2723 goto fail; 2724 2725 wacom_wac->hid_data.inputmode = -1; 2726 wacom_wac->mode_report = -1; 2727 2728 wacom->usbdev = dev; 2729 wacom->intf = intf; 2730 mutex_init(&wacom->lock); 2731 INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work); 2732 INIT_WORK(&wacom->wireless_work, wacom_wireless_work); 2733 INIT_WORK(&wacom->battery_work, wacom_battery_work); 2734 INIT_WORK(&wacom->remote_work, wacom_remote_work); 2735 INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work); 2736 2737 /* ask for the report descriptor to be loaded by HID */ 2738 error = hid_parse(hdev); 2739 if (error) { 2740 hid_err(hdev, "parse failed\n"); 2741 goto fail; 2742 } 2743 2744 error = wacom_parse_and_register(wacom, false); 2745 if (error) 2746 goto fail; 2747 2748 if (hdev->bus == BUS_BLUETOOTH) { 2749 error = device_create_file(&hdev->dev, &dev_attr_speed); 2750 if (error) 2751 hid_warn(hdev, 2752 "can't create sysfs speed attribute err: %d\n", 2753 error); 2754 } 2755 2756 return 0; 2757 2758 fail: 2759 hid_set_drvdata(hdev, NULL); 2760 return error; 2761 } 2762 2763 static void wacom_remove(struct hid_device *hdev) 2764 { 2765 struct wacom *wacom = hid_get_drvdata(hdev); 2766 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2767 struct wacom_features *features = &wacom_wac->features; 2768 2769 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) 2770 hid_hw_close(hdev); 2771 2772 hid_hw_stop(hdev); 2773 2774 cancel_delayed_work_sync(&wacom->init_work); 2775 cancel_work_sync(&wacom->wireless_work); 2776 cancel_work_sync(&wacom->battery_work); 2777 cancel_work_sync(&wacom->remote_work); 2778 cancel_work_sync(&wacom->mode_change_work); 2779 if (hdev->bus == BUS_BLUETOOTH) 2780 device_remove_file(&hdev->dev, &dev_attr_speed); 2781 2782 /* make sure we don't trigger the LEDs */ 2783 wacom_led_groups_release(wacom); 2784 2785 if (wacom->wacom_wac.features.type != REMOTE) 2786 wacom_release_resources(wacom); 2787 2788 kfifo_free(&wacom_wac->pen_fifo); 2789 2790 hid_set_drvdata(hdev, NULL); 2791 } 2792 2793 #ifdef CONFIG_PM 2794 static int wacom_resume(struct hid_device *hdev) 2795 { 2796 struct wacom *wacom = hid_get_drvdata(hdev); 2797 2798 mutex_lock(&wacom->lock); 2799 2800 /* switch to wacom mode first */ 2801 _wacom_query_tablet_data(wacom); 2802 wacom_led_control(wacom); 2803 2804 mutex_unlock(&wacom->lock); 2805 2806 return 0; 2807 } 2808 2809 static int wacom_reset_resume(struct hid_device *hdev) 2810 { 2811 return wacom_resume(hdev); 2812 } 2813 #endif /* CONFIG_PM */ 2814 2815 static struct hid_driver wacom_driver = { 2816 .name = "wacom", 2817 .id_table = wacom_ids, 2818 .probe = wacom_probe, 2819 .remove = wacom_remove, 2820 .report = wacom_wac_report, 2821 #ifdef CONFIG_PM 2822 .resume = wacom_resume, 2823 .reset_resume = wacom_reset_resume, 2824 #endif 2825 .raw_event = wacom_raw_event, 2826 }; 2827 module_hid_driver(wacom_driver); 2828 2829 MODULE_VERSION(DRIVER_VERSION); 2830 MODULE_AUTHOR(DRIVER_AUTHOR); 2831 MODULE_DESCRIPTION(DRIVER_DESC); 2832 MODULE_LICENSE("GPL"); 2833