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 WACOM_HID_WD_TOUCH_RING_SETTING: 308 wacom->generic_has_leds = true; 309 break; 310 case HID_DG_CONTACTMAX: 311 /* leave touch_max as is if predefined */ 312 if (!features->touch_max) { 313 /* read manually */ 314 n = hid_report_len(field->report); 315 data = hid_alloc_report_buf(field->report, GFP_KERNEL); 316 if (!data) 317 break; 318 data[0] = field->report->id; 319 ret = wacom_get_report(hdev, HID_FEATURE_REPORT, 320 data, n, WAC_CMD_RETRIES); 321 if (ret == n) { 322 ret = hid_report_raw_event(hdev, 323 HID_FEATURE_REPORT, data, n, 0); 324 } else { 325 features->touch_max = 16; 326 hid_warn(hdev, "wacom_feature_mapping: " 327 "could not get HID_DG_CONTACTMAX, " 328 "defaulting to %d\n", 329 features->touch_max); 330 } 331 kfree(data); 332 } 333 break; 334 case HID_DG_INPUTMODE: 335 /* Ignore if value index is out of bounds. */ 336 if (usage->usage_index >= field->report_count) { 337 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n"); 338 break; 339 } 340 341 hid_data->inputmode = field->report->id; 342 hid_data->inputmode_index = usage->usage_index; 343 break; 344 345 case HID_UP_DIGITIZER: 346 if (field->report->id == 0x0B && 347 (field->application == WACOM_HID_G9_PEN || 348 field->application == WACOM_HID_G11_PEN)) { 349 wacom->wacom_wac.mode_report = field->report->id; 350 wacom->wacom_wac.mode_value = 0; 351 } 352 break; 353 354 case WACOM_HID_WD_DATAMODE: 355 wacom->wacom_wac.mode_report = field->report->id; 356 wacom->wacom_wac.mode_value = 2; 357 break; 358 359 case WACOM_HID_UP_G9: 360 case WACOM_HID_UP_G11: 361 if (field->report->id == 0x03 && 362 (field->application == WACOM_HID_G9_TOUCHSCREEN || 363 field->application == WACOM_HID_G11_TOUCHSCREEN)) { 364 wacom->wacom_wac.mode_report = field->report->id; 365 wacom->wacom_wac.mode_value = 0; 366 } 367 break; 368 case WACOM_HID_WD_OFFSETLEFT: 369 case WACOM_HID_WD_OFFSETTOP: 370 case WACOM_HID_WD_OFFSETRIGHT: 371 case WACOM_HID_WD_OFFSETBOTTOM: 372 /* read manually */ 373 n = hid_report_len(field->report); 374 data = hid_alloc_report_buf(field->report, GFP_KERNEL); 375 if (!data) 376 break; 377 data[0] = field->report->id; 378 ret = wacom_get_report(hdev, HID_FEATURE_REPORT, 379 data, n, WAC_CMD_RETRIES); 380 if (ret == n) { 381 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, 382 data, n, 0); 383 } else { 384 hid_warn(hdev, "%s: could not retrieve sensor offsets\n", 385 __func__); 386 } 387 kfree(data); 388 break; 389 } 390 } 391 392 /* 393 * Interface Descriptor of wacom devices can be incomplete and 394 * inconsistent so wacom_features table is used to store stylus 395 * device's packet lengths, various maximum values, and tablet 396 * resolution based on product ID's. 397 * 398 * For devices that contain 2 interfaces, wacom_features table is 399 * inaccurate for the touch interface. Since the Interface Descriptor 400 * for touch interfaces has pretty complete data, this function exists 401 * to query tablet for this missing information instead of hard coding in 402 * an additional table. 403 * 404 * A typical Interface Descriptor for a stylus will contain a 405 * boot mouse application collection that is not of interest and this 406 * function will ignore it. 407 * 408 * It also contains a digitizer application collection that also is not 409 * of interest since any information it contains would be duplicate 410 * of what is in wacom_features. Usually it defines a report of an array 411 * of bytes that could be used as max length of the stylus packet returned. 412 * If it happens to define a Digitizer-Stylus Physical Collection then 413 * the X and Y logical values contain valid data but it is ignored. 414 * 415 * A typical Interface Descriptor for a touch interface will contain a 416 * Digitizer-Finger Physical Collection which will define both logical 417 * X/Y maximum as well as the physical size of tablet. Since touch 418 * interfaces haven't supported pressure or distance, this is enough 419 * information to override invalid values in the wacom_features table. 420 * 421 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful 422 * data. We deal with them after returning from this function. 423 */ 424 static void wacom_usage_mapping(struct hid_device *hdev, 425 struct hid_field *field, struct hid_usage *usage) 426 { 427 struct wacom *wacom = hid_get_drvdata(hdev); 428 struct wacom_features *features = &wacom->wacom_wac.features; 429 bool finger = WACOM_FINGER_FIELD(field); 430 bool pen = WACOM_PEN_FIELD(field); 431 unsigned equivalent_usage = wacom_equivalent_usage(usage->hid); 432 433 /* 434 * Requiring Stylus Usage will ignore boot mouse 435 * X/Y values and some cases of invalid Digitizer X/Y 436 * values commonly reported. 437 */ 438 if (pen) 439 features->device_type |= WACOM_DEVICETYPE_PEN; 440 else if (finger) 441 features->device_type |= WACOM_DEVICETYPE_TOUCH; 442 else 443 return; 444 445 wacom_hid_usage_quirk(hdev, field, usage); 446 447 switch (equivalent_usage) { 448 case HID_GD_X: 449 features->x_max = field->logical_maximum; 450 if (finger) { 451 features->x_phy = field->physical_maximum; 452 if ((features->type != BAMBOO_PT) && 453 (features->type != BAMBOO_TOUCH)) { 454 features->unit = field->unit; 455 features->unitExpo = field->unit_exponent; 456 } 457 } 458 break; 459 case HID_GD_Y: 460 features->y_max = field->logical_maximum; 461 if (finger) { 462 features->y_phy = field->physical_maximum; 463 if ((features->type != BAMBOO_PT) && 464 (features->type != BAMBOO_TOUCH)) { 465 features->unit = field->unit; 466 features->unitExpo = field->unit_exponent; 467 } 468 } 469 break; 470 case HID_DG_TIPPRESSURE: 471 if (pen) 472 features->pressure_max = field->logical_maximum; 473 break; 474 } 475 476 if (features->type == HID_GENERIC) 477 wacom_wac_usage_mapping(hdev, field, usage); 478 } 479 480 static void wacom_post_parse_hid(struct hid_device *hdev, 481 struct wacom_features *features) 482 { 483 struct wacom *wacom = hid_get_drvdata(hdev); 484 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 485 486 if (features->type == HID_GENERIC) { 487 /* Any last-minute generic device setup */ 488 if (wacom_wac->has_mode_change) { 489 if (wacom_wac->is_direct_mode) 490 features->device_type |= WACOM_DEVICETYPE_DIRECT; 491 else 492 features->device_type &= ~WACOM_DEVICETYPE_DIRECT; 493 } 494 495 if (features->touch_max > 1) { 496 if (features->device_type & WACOM_DEVICETYPE_DIRECT) 497 input_mt_init_slots(wacom_wac->touch_input, 498 wacom_wac->features.touch_max, 499 INPUT_MT_DIRECT); 500 else 501 input_mt_init_slots(wacom_wac->touch_input, 502 wacom_wac->features.touch_max, 503 INPUT_MT_POINTER); 504 } 505 } 506 } 507 508 static void wacom_parse_hid(struct hid_device *hdev, 509 struct wacom_features *features) 510 { 511 struct hid_report_enum *rep_enum; 512 struct hid_report *hreport; 513 int i, j; 514 515 /* check features first */ 516 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT]; 517 list_for_each_entry(hreport, &rep_enum->report_list, list) { 518 for (i = 0; i < hreport->maxfield; i++) { 519 /* Ignore if report count is out of bounds. */ 520 if (hreport->field[i]->report_count < 1) 521 continue; 522 523 for (j = 0; j < hreport->field[i]->maxusage; j++) { 524 wacom_feature_mapping(hdev, hreport->field[i], 525 hreport->field[i]->usage + j); 526 } 527 } 528 } 529 530 /* now check the input usages */ 531 rep_enum = &hdev->report_enum[HID_INPUT_REPORT]; 532 list_for_each_entry(hreport, &rep_enum->report_list, list) { 533 534 if (!hreport->maxfield) 535 continue; 536 537 for (i = 0; i < hreport->maxfield; i++) 538 for (j = 0; j < hreport->field[i]->maxusage; j++) 539 wacom_usage_mapping(hdev, hreport->field[i], 540 hreport->field[i]->usage + j); 541 } 542 543 wacom_post_parse_hid(hdev, features); 544 } 545 546 static int wacom_hid_set_device_mode(struct hid_device *hdev) 547 { 548 struct wacom *wacom = hid_get_drvdata(hdev); 549 struct hid_data *hid_data = &wacom->wacom_wac.hid_data; 550 struct hid_report *r; 551 struct hid_report_enum *re; 552 553 if (hid_data->inputmode < 0) 554 return 0; 555 556 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 557 r = re->report_id_hash[hid_data->inputmode]; 558 if (r) { 559 r->field[0]->value[hid_data->inputmode_index] = 2; 560 hid_hw_request(hdev, r, HID_REQ_SET_REPORT); 561 } 562 return 0; 563 } 564 565 static int wacom_set_device_mode(struct hid_device *hdev, 566 struct wacom_wac *wacom_wac) 567 { 568 u8 *rep_data; 569 struct hid_report *r; 570 struct hid_report_enum *re; 571 u32 length; 572 int error = -ENOMEM, limit = 0; 573 574 if (wacom_wac->mode_report < 0) 575 return 0; 576 577 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 578 r = re->report_id_hash[wacom_wac->mode_report]; 579 if (!r) 580 return -EINVAL; 581 582 rep_data = hid_alloc_report_buf(r, GFP_KERNEL); 583 if (!rep_data) 584 return -ENOMEM; 585 586 length = hid_report_len(r); 587 588 do { 589 rep_data[0] = wacom_wac->mode_report; 590 rep_data[1] = wacom_wac->mode_value; 591 592 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 593 length, 1); 594 if (error >= 0) 595 error = wacom_get_report(hdev, HID_FEATURE_REPORT, 596 rep_data, length, 1); 597 } while (error >= 0 && 598 rep_data[1] != wacom_wac->mode_report && 599 limit++ < WAC_MSG_RETRIES); 600 601 kfree(rep_data); 602 603 return error < 0 ? error : 0; 604 } 605 606 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed, 607 struct wacom_features *features) 608 { 609 struct wacom *wacom = hid_get_drvdata(hdev); 610 int ret; 611 u8 rep_data[2]; 612 613 switch (features->type) { 614 case GRAPHIRE_BT: 615 rep_data[0] = 0x03; 616 rep_data[1] = 0x00; 617 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2, 618 3); 619 620 if (ret >= 0) { 621 rep_data[0] = speed == 0 ? 0x05 : 0x06; 622 rep_data[1] = 0x00; 623 624 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, 625 rep_data, 2, 3); 626 627 if (ret >= 0) { 628 wacom->wacom_wac.bt_high_speed = speed; 629 return 0; 630 } 631 } 632 633 /* 634 * Note that if the raw queries fail, it's not a hard failure 635 * and it is safe to continue 636 */ 637 hid_warn(hdev, "failed to poke device, command %d, err %d\n", 638 rep_data[0], ret); 639 break; 640 case INTUOS4WL: 641 if (speed == 1) 642 wacom->wacom_wac.bt_features &= ~0x20; 643 else 644 wacom->wacom_wac.bt_features |= 0x20; 645 646 rep_data[0] = 0x03; 647 rep_data[1] = wacom->wacom_wac.bt_features; 648 649 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2, 650 1); 651 if (ret >= 0) 652 wacom->wacom_wac.bt_high_speed = speed; 653 break; 654 } 655 656 return 0; 657 } 658 659 /* 660 * Switch the tablet into its most-capable mode. Wacom tablets are 661 * typically configured to power-up in a mode which sends mouse-like 662 * reports to the OS. To get absolute position, pressure data, etc. 663 * from the tablet, it is necessary to switch the tablet out of this 664 * mode and into one which sends the full range of tablet data. 665 */ 666 static int _wacom_query_tablet_data(struct wacom *wacom) 667 { 668 struct hid_device *hdev = wacom->hdev; 669 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 670 struct wacom_features *features = &wacom_wac->features; 671 672 if (hdev->bus == BUS_BLUETOOTH) 673 return wacom_bt_query_tablet_data(hdev, 1, features); 674 675 if (features->type != HID_GENERIC) { 676 if (features->device_type & WACOM_DEVICETYPE_TOUCH) { 677 if (features->type > TABLETPC) { 678 /* MT Tablet PC touch */ 679 wacom_wac->mode_report = 3; 680 wacom_wac->mode_value = 4; 681 } else if (features->type == WACOM_24HDT) { 682 wacom_wac->mode_report = 18; 683 wacom_wac->mode_value = 2; 684 } else if (features->type == WACOM_27QHDT) { 685 wacom_wac->mode_report = 131; 686 wacom_wac->mode_value = 2; 687 } else if (features->type == BAMBOO_PAD) { 688 wacom_wac->mode_report = 2; 689 wacom_wac->mode_value = 2; 690 } 691 } else if (features->device_type & WACOM_DEVICETYPE_PEN) { 692 if (features->type <= BAMBOO_PT) { 693 wacom_wac->mode_report = 2; 694 wacom_wac->mode_value = 2; 695 } 696 } 697 } 698 699 wacom_set_device_mode(hdev, wacom_wac); 700 701 if (features->type == HID_GENERIC) 702 return wacom_hid_set_device_mode(hdev); 703 704 return 0; 705 } 706 707 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev, 708 struct wacom_features *features) 709 { 710 struct wacom *wacom = hid_get_drvdata(hdev); 711 struct usb_interface *intf = wacom->intf; 712 713 /* default features */ 714 features->x_fuzz = 4; 715 features->y_fuzz = 4; 716 features->pressure_fuzz = 0; 717 features->distance_fuzz = 1; 718 features->tilt_fuzz = 1; 719 720 /* 721 * The wireless device HID is basic and layout conflicts with 722 * other tablets (monitor and touch interface can look like pen). 723 * Skip the query for this type and modify defaults based on 724 * interface number. 725 */ 726 if (features->type == WIRELESS) { 727 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) 728 features->device_type = WACOM_DEVICETYPE_WL_MONITOR; 729 else 730 features->device_type = WACOM_DEVICETYPE_NONE; 731 return; 732 } 733 734 wacom_parse_hid(hdev, features); 735 } 736 737 struct wacom_hdev_data { 738 struct list_head list; 739 struct kref kref; 740 struct hid_device *dev; 741 struct wacom_shared shared; 742 }; 743 744 static LIST_HEAD(wacom_udev_list); 745 static DEFINE_MUTEX(wacom_udev_list_lock); 746 747 static bool wacom_are_sibling(struct hid_device *hdev, 748 struct hid_device *sibling) 749 { 750 struct wacom *wacom = hid_get_drvdata(hdev); 751 struct wacom_features *features = &wacom->wacom_wac.features; 752 struct wacom *sibling_wacom = hid_get_drvdata(sibling); 753 struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features; 754 __u32 oVid = features->oVid ? features->oVid : hdev->vendor; 755 __u32 oPid = features->oPid ? features->oPid : hdev->product; 756 757 /* The defined oVid/oPid must match that of the sibling */ 758 if (features->oVid != HID_ANY_ID && sibling->vendor != oVid) 759 return false; 760 if (features->oPid != HID_ANY_ID && sibling->product != oPid) 761 return false; 762 763 /* 764 * Devices with the same VID/PID must share the same physical 765 * device path, while those with different VID/PID must share 766 * the same physical parent device path. 767 */ 768 if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) { 769 if (!hid_compare_device_paths(hdev, sibling, '/')) 770 return false; 771 } else { 772 if (!hid_compare_device_paths(hdev, sibling, '.')) 773 return false; 774 } 775 776 /* Skip the remaining heuristics unless you are a HID_GENERIC device */ 777 if (features->type != HID_GENERIC) 778 return true; 779 780 /* 781 * Direct-input devices may not be siblings of indirect-input 782 * devices. 783 */ 784 if ((features->device_type & WACOM_DEVICETYPE_DIRECT) && 785 !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT)) 786 return false; 787 788 /* 789 * Indirect-input devices may not be siblings of direct-input 790 * devices. 791 */ 792 if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) && 793 (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT)) 794 return false; 795 796 /* Pen devices may only be siblings of touch devices */ 797 if ((features->device_type & WACOM_DEVICETYPE_PEN) && 798 !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH)) 799 return false; 800 801 /* Touch devices may only be siblings of pen devices */ 802 if ((features->device_type & WACOM_DEVICETYPE_TOUCH) && 803 !(sibling_features->device_type & WACOM_DEVICETYPE_PEN)) 804 return false; 805 806 /* 807 * No reason could be found for these two devices to NOT be 808 * siblings, so there's a good chance they ARE siblings 809 */ 810 return true; 811 } 812 813 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev) 814 { 815 struct wacom_hdev_data *data; 816 817 /* Try to find an already-probed interface from the same device */ 818 list_for_each_entry(data, &wacom_udev_list, list) { 819 if (hid_compare_device_paths(hdev, data->dev, '/')) { 820 kref_get(&data->kref); 821 return data; 822 } 823 } 824 825 /* Fallback to finding devices that appear to be "siblings" */ 826 list_for_each_entry(data, &wacom_udev_list, list) { 827 if (wacom_are_sibling(hdev, data->dev)) { 828 kref_get(&data->kref); 829 return data; 830 } 831 } 832 833 return NULL; 834 } 835 836 static void wacom_release_shared_data(struct kref *kref) 837 { 838 struct wacom_hdev_data *data = 839 container_of(kref, struct wacom_hdev_data, kref); 840 841 mutex_lock(&wacom_udev_list_lock); 842 list_del(&data->list); 843 mutex_unlock(&wacom_udev_list_lock); 844 845 kfree(data); 846 } 847 848 static void wacom_remove_shared_data(void *res) 849 { 850 struct wacom *wacom = res; 851 struct wacom_hdev_data *data; 852 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 853 854 if (wacom_wac->shared) { 855 data = container_of(wacom_wac->shared, struct wacom_hdev_data, 856 shared); 857 858 if (wacom_wac->shared->touch == wacom->hdev) 859 wacom_wac->shared->touch = NULL; 860 else if (wacom_wac->shared->pen == wacom->hdev) 861 wacom_wac->shared->pen = NULL; 862 863 kref_put(&data->kref, wacom_release_shared_data); 864 wacom_wac->shared = NULL; 865 } 866 } 867 868 static int wacom_add_shared_data(struct hid_device *hdev) 869 { 870 struct wacom *wacom = hid_get_drvdata(hdev); 871 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 872 struct wacom_hdev_data *data; 873 int retval = 0; 874 875 mutex_lock(&wacom_udev_list_lock); 876 877 data = wacom_get_hdev_data(hdev); 878 if (!data) { 879 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL); 880 if (!data) { 881 retval = -ENOMEM; 882 goto out; 883 } 884 885 kref_init(&data->kref); 886 data->dev = hdev; 887 list_add_tail(&data->list, &wacom_udev_list); 888 } 889 890 wacom_wac->shared = &data->shared; 891 892 retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom); 893 if (retval) { 894 mutex_unlock(&wacom_udev_list_lock); 895 wacom_remove_shared_data(wacom); 896 return retval; 897 } 898 899 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) 900 wacom_wac->shared->touch = hdev; 901 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN) 902 wacom_wac->shared->pen = hdev; 903 904 out: 905 mutex_unlock(&wacom_udev_list_lock); 906 return retval; 907 } 908 909 static int wacom_led_control(struct wacom *wacom) 910 { 911 unsigned char *buf; 912 int retval; 913 unsigned char report_id = WAC_CMD_LED_CONTROL; 914 int buf_size = 9; 915 916 if (!wacom->led.groups) 917 return -ENOTSUPP; 918 919 if (wacom->wacom_wac.features.type == REMOTE) 920 return -ENOTSUPP; 921 922 if (wacom->wacom_wac.pid) { /* wireless connected */ 923 report_id = WAC_CMD_WL_LED_CONTROL; 924 buf_size = 13; 925 } 926 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) { 927 report_id = WAC_CMD_WL_INTUOSP2; 928 buf_size = 51; 929 } 930 buf = kzalloc(buf_size, GFP_KERNEL); 931 if (!buf) 932 return -ENOMEM; 933 934 if (wacom->wacom_wac.features.type == HID_GENERIC) { 935 buf[0] = WAC_CMD_LED_CONTROL_GENERIC; 936 buf[1] = wacom->led.llv; 937 buf[2] = wacom->led.groups[0].select & 0x03; 938 939 } else if ((wacom->wacom_wac.features.type >= INTUOS5S && 940 wacom->wacom_wac.features.type <= INTUOSPL)) { 941 /* 942 * Touch Ring and crop mark LED luminance may take on 943 * one of four values: 944 * 0 = Low; 1 = Medium; 2 = High; 3 = Off 945 */ 946 int ring_led = wacom->led.groups[0].select & 0x03; 947 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03; 948 int crop_lum = 0; 949 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led); 950 951 buf[0] = report_id; 952 if (wacom->wacom_wac.pid) { 953 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT, 954 buf, buf_size, WAC_CMD_RETRIES); 955 buf[0] = report_id; 956 buf[4] = led_bits; 957 } else 958 buf[1] = led_bits; 959 } 960 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) { 961 buf[0] = report_id; 962 buf[4] = 100; // Power Connection LED (ORANGE) 963 buf[5] = 100; // BT Connection LED (BLUE) 964 buf[6] = 100; // Paper Mode (RED?) 965 buf[7] = 100; // Paper Mode (GREEN?) 966 buf[8] = 100; // Paper Mode (BLUE?) 967 buf[9] = wacom->led.llv; 968 buf[10] = wacom->led.groups[0].select & 0x03; 969 } 970 else { 971 int led = wacom->led.groups[0].select | 0x4; 972 973 if (wacom->wacom_wac.features.type == WACOM_21UX2 || 974 wacom->wacom_wac.features.type == WACOM_24HD) 975 led |= (wacom->led.groups[1].select << 4) | 0x40; 976 977 buf[0] = report_id; 978 buf[1] = led; 979 buf[2] = wacom->led.llv; 980 buf[3] = wacom->led.hlv; 981 buf[4] = wacom->led.img_lum; 982 } 983 984 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size, 985 WAC_CMD_RETRIES); 986 kfree(buf); 987 988 return retval; 989 } 990 991 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id, 992 const unsigned len, const void *img) 993 { 994 unsigned char *buf; 995 int i, retval; 996 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */ 997 998 buf = kzalloc(chunk_len + 3 , GFP_KERNEL); 999 if (!buf) 1000 return -ENOMEM; 1001 1002 /* Send 'start' command */ 1003 buf[0] = WAC_CMD_ICON_START; 1004 buf[1] = 1; 1005 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2, 1006 WAC_CMD_RETRIES); 1007 if (retval < 0) 1008 goto out; 1009 1010 buf[0] = xfer_id; 1011 buf[1] = button_id & 0x07; 1012 for (i = 0; i < 4; i++) { 1013 buf[2] = i; 1014 memcpy(buf + 3, img + i * chunk_len, chunk_len); 1015 1016 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, 1017 buf, chunk_len + 3, WAC_CMD_RETRIES); 1018 if (retval < 0) 1019 break; 1020 } 1021 1022 /* Send 'stop' */ 1023 buf[0] = WAC_CMD_ICON_START; 1024 buf[1] = 0; 1025 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2, 1026 WAC_CMD_RETRIES); 1027 1028 out: 1029 kfree(buf); 1030 return retval; 1031 } 1032 1033 static ssize_t wacom_led_select_store(struct device *dev, int set_id, 1034 const char *buf, size_t count) 1035 { 1036 struct hid_device *hdev = to_hid_device(dev); 1037 struct wacom *wacom = hid_get_drvdata(hdev); 1038 unsigned int id; 1039 int err; 1040 1041 err = kstrtouint(buf, 10, &id); 1042 if (err) 1043 return err; 1044 1045 mutex_lock(&wacom->lock); 1046 1047 wacom->led.groups[set_id].select = id & 0x3; 1048 err = wacom_led_control(wacom); 1049 1050 mutex_unlock(&wacom->lock); 1051 1052 return err < 0 ? err : count; 1053 } 1054 1055 #define DEVICE_LED_SELECT_ATTR(SET_ID) \ 1056 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \ 1057 struct device_attribute *attr, const char *buf, size_t count) \ 1058 { \ 1059 return wacom_led_select_store(dev, SET_ID, buf, count); \ 1060 } \ 1061 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \ 1062 struct device_attribute *attr, char *buf) \ 1063 { \ 1064 struct hid_device *hdev = to_hid_device(dev);\ 1065 struct wacom *wacom = hid_get_drvdata(hdev); \ 1066 return scnprintf(buf, PAGE_SIZE, "%d\n", \ 1067 wacom->led.groups[SET_ID].select); \ 1068 } \ 1069 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \ 1070 wacom_led##SET_ID##_select_show, \ 1071 wacom_led##SET_ID##_select_store) 1072 1073 DEVICE_LED_SELECT_ATTR(0); 1074 DEVICE_LED_SELECT_ATTR(1); 1075 1076 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest, 1077 const char *buf, size_t count) 1078 { 1079 unsigned int value; 1080 int err; 1081 1082 err = kstrtouint(buf, 10, &value); 1083 if (err) 1084 return err; 1085 1086 mutex_lock(&wacom->lock); 1087 1088 *dest = value & 0x7f; 1089 err = wacom_led_control(wacom); 1090 1091 mutex_unlock(&wacom->lock); 1092 1093 return err < 0 ? err : count; 1094 } 1095 1096 #define DEVICE_LUMINANCE_ATTR(name, field) \ 1097 static ssize_t wacom_##name##_luminance_store(struct device *dev, \ 1098 struct device_attribute *attr, const char *buf, size_t count) \ 1099 { \ 1100 struct hid_device *hdev = to_hid_device(dev);\ 1101 struct wacom *wacom = hid_get_drvdata(hdev); \ 1102 \ 1103 return wacom_luminance_store(wacom, &wacom->led.field, \ 1104 buf, count); \ 1105 } \ 1106 static ssize_t wacom_##name##_luminance_show(struct device *dev, \ 1107 struct device_attribute *attr, char *buf) \ 1108 { \ 1109 struct wacom *wacom = dev_get_drvdata(dev); \ 1110 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \ 1111 } \ 1112 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \ 1113 wacom_##name##_luminance_show, \ 1114 wacom_##name##_luminance_store) 1115 1116 DEVICE_LUMINANCE_ATTR(status0, llv); 1117 DEVICE_LUMINANCE_ATTR(status1, hlv); 1118 DEVICE_LUMINANCE_ATTR(buttons, img_lum); 1119 1120 static ssize_t wacom_button_image_store(struct device *dev, int button_id, 1121 const char *buf, size_t count) 1122 { 1123 struct hid_device *hdev = to_hid_device(dev); 1124 struct wacom *wacom = hid_get_drvdata(hdev); 1125 int err; 1126 unsigned len; 1127 u8 xfer_id; 1128 1129 if (hdev->bus == BUS_BLUETOOTH) { 1130 len = 256; 1131 xfer_id = WAC_CMD_ICON_BT_XFER; 1132 } else { 1133 len = 1024; 1134 xfer_id = WAC_CMD_ICON_XFER; 1135 } 1136 1137 if (count != len) 1138 return -EINVAL; 1139 1140 mutex_lock(&wacom->lock); 1141 1142 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf); 1143 1144 mutex_unlock(&wacom->lock); 1145 1146 return err < 0 ? err : count; 1147 } 1148 1149 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \ 1150 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \ 1151 struct device_attribute *attr, const char *buf, size_t count) \ 1152 { \ 1153 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \ 1154 } \ 1155 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \ 1156 NULL, wacom_btnimg##BUTTON_ID##_store) 1157 1158 DEVICE_BTNIMG_ATTR(0); 1159 DEVICE_BTNIMG_ATTR(1); 1160 DEVICE_BTNIMG_ATTR(2); 1161 DEVICE_BTNIMG_ATTR(3); 1162 DEVICE_BTNIMG_ATTR(4); 1163 DEVICE_BTNIMG_ATTR(5); 1164 DEVICE_BTNIMG_ATTR(6); 1165 DEVICE_BTNIMG_ATTR(7); 1166 1167 static struct attribute *cintiq_led_attrs[] = { 1168 &dev_attr_status_led0_select.attr, 1169 &dev_attr_status_led1_select.attr, 1170 NULL 1171 }; 1172 1173 static struct attribute_group cintiq_led_attr_group = { 1174 .name = "wacom_led", 1175 .attrs = cintiq_led_attrs, 1176 }; 1177 1178 static struct attribute *intuos4_led_attrs[] = { 1179 &dev_attr_status0_luminance.attr, 1180 &dev_attr_status1_luminance.attr, 1181 &dev_attr_status_led0_select.attr, 1182 &dev_attr_buttons_luminance.attr, 1183 &dev_attr_button0_rawimg.attr, 1184 &dev_attr_button1_rawimg.attr, 1185 &dev_attr_button2_rawimg.attr, 1186 &dev_attr_button3_rawimg.attr, 1187 &dev_attr_button4_rawimg.attr, 1188 &dev_attr_button5_rawimg.attr, 1189 &dev_attr_button6_rawimg.attr, 1190 &dev_attr_button7_rawimg.attr, 1191 NULL 1192 }; 1193 1194 static struct attribute_group intuos4_led_attr_group = { 1195 .name = "wacom_led", 1196 .attrs = intuos4_led_attrs, 1197 }; 1198 1199 static struct attribute *intuos5_led_attrs[] = { 1200 &dev_attr_status0_luminance.attr, 1201 &dev_attr_status_led0_select.attr, 1202 NULL 1203 }; 1204 1205 static struct attribute_group intuos5_led_attr_group = { 1206 .name = "wacom_led", 1207 .attrs = intuos5_led_attrs, 1208 }; 1209 1210 static struct attribute *generic_led_attrs[] = { 1211 &dev_attr_status0_luminance.attr, 1212 &dev_attr_status_led0_select.attr, 1213 NULL 1214 }; 1215 1216 static struct attribute_group generic_led_attr_group = { 1217 .name = "wacom_led", 1218 .attrs = generic_led_attrs, 1219 }; 1220 1221 struct wacom_sysfs_group_devres { 1222 struct attribute_group *group; 1223 struct kobject *root; 1224 }; 1225 1226 static void wacom_devm_sysfs_group_release(struct device *dev, void *res) 1227 { 1228 struct wacom_sysfs_group_devres *devres = res; 1229 struct kobject *kobj = devres->root; 1230 1231 dev_dbg(dev, "%s: dropping reference to %s\n", 1232 __func__, devres->group->name); 1233 sysfs_remove_group(kobj, devres->group); 1234 } 1235 1236 static int __wacom_devm_sysfs_create_group(struct wacom *wacom, 1237 struct kobject *root, 1238 struct attribute_group *group) 1239 { 1240 struct wacom_sysfs_group_devres *devres; 1241 int error; 1242 1243 devres = devres_alloc(wacom_devm_sysfs_group_release, 1244 sizeof(struct wacom_sysfs_group_devres), 1245 GFP_KERNEL); 1246 if (!devres) 1247 return -ENOMEM; 1248 1249 devres->group = group; 1250 devres->root = root; 1251 1252 error = sysfs_create_group(devres->root, group); 1253 if (error) { 1254 devres_free(devres); 1255 return error; 1256 } 1257 1258 devres_add(&wacom->hdev->dev, devres); 1259 1260 return 0; 1261 } 1262 1263 static int wacom_devm_sysfs_create_group(struct wacom *wacom, 1264 struct attribute_group *group) 1265 { 1266 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj, 1267 group); 1268 } 1269 1270 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led) 1271 { 1272 struct wacom *wacom = led->wacom; 1273 1274 if (wacom->led.max_hlv) 1275 return led->hlv * LED_FULL / wacom->led.max_hlv; 1276 1277 if (wacom->led.max_llv) 1278 return led->llv * LED_FULL / wacom->led.max_llv; 1279 1280 /* device doesn't support brightness tuning */ 1281 return LED_FULL; 1282 } 1283 1284 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev) 1285 { 1286 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev); 1287 struct wacom *wacom = led->wacom; 1288 1289 if (wacom->led.groups[led->group].select != led->id) 1290 return LED_OFF; 1291 1292 return wacom_leds_brightness_get(led); 1293 } 1294 1295 static int wacom_led_brightness_set(struct led_classdev *cdev, 1296 enum led_brightness brightness) 1297 { 1298 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev); 1299 struct wacom *wacom = led->wacom; 1300 int error; 1301 1302 mutex_lock(&wacom->lock); 1303 1304 if (!wacom->led.groups || (brightness == LED_OFF && 1305 wacom->led.groups[led->group].select != led->id)) { 1306 error = 0; 1307 goto out; 1308 } 1309 1310 led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL; 1311 led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL; 1312 1313 wacom->led.groups[led->group].select = led->id; 1314 1315 error = wacom_led_control(wacom); 1316 1317 out: 1318 mutex_unlock(&wacom->lock); 1319 1320 return error; 1321 } 1322 1323 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev, 1324 enum led_brightness brightness) 1325 { 1326 } 1327 1328 static int wacom_led_register_one(struct device *dev, struct wacom *wacom, 1329 struct wacom_led *led, unsigned int group, 1330 unsigned int id, bool read_only) 1331 { 1332 int error; 1333 char *name; 1334 1335 name = devm_kasprintf(dev, GFP_KERNEL, 1336 "%s::wacom-%d.%d", 1337 dev_name(dev), 1338 group, 1339 id); 1340 if (!name) 1341 return -ENOMEM; 1342 1343 if (!read_only) { 1344 led->trigger.name = name; 1345 error = devm_led_trigger_register(dev, &led->trigger); 1346 if (error) { 1347 hid_err(wacom->hdev, 1348 "failed to register LED trigger %s: %d\n", 1349 led->cdev.name, error); 1350 return error; 1351 } 1352 } 1353 1354 led->group = group; 1355 led->id = id; 1356 led->wacom = wacom; 1357 led->llv = wacom->led.llv; 1358 led->hlv = wacom->led.hlv; 1359 led->cdev.name = name; 1360 led->cdev.max_brightness = LED_FULL; 1361 led->cdev.flags = LED_HW_PLUGGABLE; 1362 led->cdev.brightness_get = __wacom_led_brightness_get; 1363 if (!read_only) { 1364 led->cdev.brightness_set_blocking = wacom_led_brightness_set; 1365 led->cdev.default_trigger = led->cdev.name; 1366 } else { 1367 led->cdev.brightness_set = wacom_led_readonly_brightness_set; 1368 } 1369 1370 error = devm_led_classdev_register(dev, &led->cdev); 1371 if (error) { 1372 hid_err(wacom->hdev, 1373 "failed to register LED %s: %d\n", 1374 led->cdev.name, error); 1375 led->cdev.name = NULL; 1376 return error; 1377 } 1378 1379 return 0; 1380 } 1381 1382 static void wacom_led_groups_release_one(void *data) 1383 { 1384 struct wacom_group_leds *group = data; 1385 1386 devres_release_group(group->dev, group); 1387 } 1388 1389 static int wacom_led_groups_alloc_and_register_one(struct device *dev, 1390 struct wacom *wacom, 1391 int group_id, int count, 1392 bool read_only) 1393 { 1394 struct wacom_led *leds; 1395 int i, error; 1396 1397 if (group_id >= wacom->led.count || count <= 0) 1398 return -EINVAL; 1399 1400 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL)) 1401 return -ENOMEM; 1402 1403 leds = devm_kcalloc(dev, count, sizeof(struct wacom_led), GFP_KERNEL); 1404 if (!leds) { 1405 error = -ENOMEM; 1406 goto err; 1407 } 1408 1409 wacom->led.groups[group_id].leds = leds; 1410 wacom->led.groups[group_id].count = count; 1411 1412 for (i = 0; i < count; i++) { 1413 error = wacom_led_register_one(dev, wacom, &leds[i], 1414 group_id, i, read_only); 1415 if (error) 1416 goto err; 1417 } 1418 1419 wacom->led.groups[group_id].dev = dev; 1420 1421 devres_close_group(dev, &wacom->led.groups[group_id]); 1422 1423 /* 1424 * There is a bug (?) in devm_led_classdev_register() in which its 1425 * increments the refcount of the parent. If the parent is an input 1426 * device, that means the ref count never reaches 0 when 1427 * devm_input_device_release() gets called. 1428 * This means that the LEDs are still there after disconnect. 1429 * Manually force the release of the group so that the leds are released 1430 * once we are done using them. 1431 */ 1432 error = devm_add_action_or_reset(&wacom->hdev->dev, 1433 wacom_led_groups_release_one, 1434 &wacom->led.groups[group_id]); 1435 if (error) 1436 return error; 1437 1438 return 0; 1439 1440 err: 1441 devres_release_group(dev, &wacom->led.groups[group_id]); 1442 return error; 1443 } 1444 1445 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id, 1446 unsigned int id) 1447 { 1448 struct wacom_group_leds *group; 1449 1450 if (group_id >= wacom->led.count) 1451 return NULL; 1452 1453 group = &wacom->led.groups[group_id]; 1454 1455 if (!group->leds) 1456 return NULL; 1457 1458 id %= group->count; 1459 1460 return &group->leds[id]; 1461 } 1462 1463 /** 1464 * wacom_led_next: gives the next available led with a wacom trigger. 1465 * 1466 * returns the next available struct wacom_led which has its default trigger 1467 * or the current one if none is available. 1468 */ 1469 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur) 1470 { 1471 struct wacom_led *next_led; 1472 int group, next; 1473 1474 if (!wacom || !cur) 1475 return NULL; 1476 1477 group = cur->group; 1478 next = cur->id; 1479 1480 do { 1481 next_led = wacom_led_find(wacom, group, ++next); 1482 if (!next_led || next_led == cur) 1483 return next_led; 1484 } while (next_led->cdev.trigger != &next_led->trigger); 1485 1486 return next_led; 1487 } 1488 1489 static void wacom_led_groups_release(void *data) 1490 { 1491 struct wacom *wacom = data; 1492 1493 wacom->led.groups = NULL; 1494 wacom->led.count = 0; 1495 } 1496 1497 static int wacom_led_groups_allocate(struct wacom *wacom, int count) 1498 { 1499 struct device *dev = &wacom->hdev->dev; 1500 struct wacom_group_leds *groups; 1501 int error; 1502 1503 groups = devm_kcalloc(dev, count, sizeof(struct wacom_group_leds), 1504 GFP_KERNEL); 1505 if (!groups) 1506 return -ENOMEM; 1507 1508 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom); 1509 if (error) 1510 return error; 1511 1512 wacom->led.groups = groups; 1513 wacom->led.count = count; 1514 1515 return 0; 1516 } 1517 1518 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count, 1519 int led_per_group, bool read_only) 1520 { 1521 struct device *dev; 1522 int i, error; 1523 1524 if (!wacom->wacom_wac.pad_input) 1525 return -EINVAL; 1526 1527 dev = &wacom->wacom_wac.pad_input->dev; 1528 1529 error = wacom_led_groups_allocate(wacom, group_count); 1530 if (error) 1531 return error; 1532 1533 for (i = 0; i < group_count; i++) { 1534 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i, 1535 led_per_group, 1536 read_only); 1537 if (error) 1538 return error; 1539 } 1540 1541 return 0; 1542 } 1543 1544 int wacom_initialize_leds(struct wacom *wacom) 1545 { 1546 int error; 1547 1548 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD)) 1549 return 0; 1550 1551 /* Initialize default values */ 1552 switch (wacom->wacom_wac.features.type) { 1553 case HID_GENERIC: 1554 if (!wacom->generic_has_leds) 1555 return 0; 1556 wacom->led.llv = 100; 1557 wacom->led.max_llv = 100; 1558 1559 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1560 if (error) { 1561 hid_err(wacom->hdev, 1562 "cannot create leds err: %d\n", error); 1563 return error; 1564 } 1565 1566 error = wacom_devm_sysfs_create_group(wacom, 1567 &generic_led_attr_group); 1568 break; 1569 1570 case INTUOS4S: 1571 case INTUOS4: 1572 case INTUOS4WL: 1573 case INTUOS4L: 1574 wacom->led.llv = 10; 1575 wacom->led.hlv = 20; 1576 wacom->led.max_llv = 127; 1577 wacom->led.max_hlv = 127; 1578 wacom->led.img_lum = 10; 1579 1580 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1581 if (error) { 1582 hid_err(wacom->hdev, 1583 "cannot create leds err: %d\n", error); 1584 return error; 1585 } 1586 1587 error = wacom_devm_sysfs_create_group(wacom, 1588 &intuos4_led_attr_group); 1589 break; 1590 1591 case WACOM_24HD: 1592 case WACOM_21UX2: 1593 wacom->led.llv = 0; 1594 wacom->led.hlv = 0; 1595 wacom->led.img_lum = 0; 1596 1597 error = wacom_leds_alloc_and_register(wacom, 2, 4, false); 1598 if (error) { 1599 hid_err(wacom->hdev, 1600 "cannot create leds err: %d\n", error); 1601 return error; 1602 } 1603 1604 error = wacom_devm_sysfs_create_group(wacom, 1605 &cintiq_led_attr_group); 1606 break; 1607 1608 case INTUOS5S: 1609 case INTUOS5: 1610 case INTUOS5L: 1611 case INTUOSPS: 1612 case INTUOSPM: 1613 case INTUOSPL: 1614 wacom->led.llv = 32; 1615 wacom->led.max_llv = 96; 1616 1617 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1618 if (error) { 1619 hid_err(wacom->hdev, 1620 "cannot create leds err: %d\n", error); 1621 return error; 1622 } 1623 1624 error = wacom_devm_sysfs_create_group(wacom, 1625 &intuos5_led_attr_group); 1626 break; 1627 1628 case INTUOSP2_BT: 1629 wacom->led.llv = 50; 1630 wacom->led.max_llv = 100; 1631 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1632 if (error) { 1633 hid_err(wacom->hdev, 1634 "cannot create leds err: %d\n", error); 1635 return error; 1636 } 1637 return 0; 1638 1639 case REMOTE: 1640 wacom->led.llv = 255; 1641 wacom->led.max_llv = 255; 1642 error = wacom_led_groups_allocate(wacom, 5); 1643 if (error) { 1644 hid_err(wacom->hdev, 1645 "cannot create leds err: %d\n", error); 1646 return error; 1647 } 1648 return 0; 1649 1650 default: 1651 return 0; 1652 } 1653 1654 if (error) { 1655 hid_err(wacom->hdev, 1656 "cannot create sysfs group err: %d\n", error); 1657 return error; 1658 } 1659 1660 return 0; 1661 } 1662 1663 static void wacom_init_work(struct work_struct *work) 1664 { 1665 struct wacom *wacom = container_of(work, struct wacom, init_work.work); 1666 1667 _wacom_query_tablet_data(wacom); 1668 wacom_led_control(wacom); 1669 } 1670 1671 static void wacom_query_tablet_data(struct wacom *wacom) 1672 { 1673 schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000)); 1674 } 1675 1676 static enum power_supply_property wacom_battery_props[] = { 1677 POWER_SUPPLY_PROP_MODEL_NAME, 1678 POWER_SUPPLY_PROP_PRESENT, 1679 POWER_SUPPLY_PROP_STATUS, 1680 POWER_SUPPLY_PROP_SCOPE, 1681 POWER_SUPPLY_PROP_CAPACITY 1682 }; 1683 1684 static int wacom_battery_get_property(struct power_supply *psy, 1685 enum power_supply_property psp, 1686 union power_supply_propval *val) 1687 { 1688 struct wacom_battery *battery = power_supply_get_drvdata(psy); 1689 int ret = 0; 1690 1691 switch (psp) { 1692 case POWER_SUPPLY_PROP_MODEL_NAME: 1693 val->strval = battery->wacom->wacom_wac.name; 1694 break; 1695 case POWER_SUPPLY_PROP_PRESENT: 1696 val->intval = battery->bat_connected; 1697 break; 1698 case POWER_SUPPLY_PROP_SCOPE: 1699 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 1700 break; 1701 case POWER_SUPPLY_PROP_CAPACITY: 1702 val->intval = battery->battery_capacity; 1703 break; 1704 case POWER_SUPPLY_PROP_STATUS: 1705 if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO) 1706 val->intval = battery->bat_status; 1707 else if (battery->bat_charging) 1708 val->intval = POWER_SUPPLY_STATUS_CHARGING; 1709 else if (battery->battery_capacity == 100 && 1710 battery->ps_connected) 1711 val->intval = POWER_SUPPLY_STATUS_FULL; 1712 else if (battery->ps_connected) 1713 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; 1714 else 1715 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 1716 break; 1717 default: 1718 ret = -EINVAL; 1719 break; 1720 } 1721 1722 return ret; 1723 } 1724 1725 static int __wacom_initialize_battery(struct wacom *wacom, 1726 struct wacom_battery *battery) 1727 { 1728 static atomic_t battery_no = ATOMIC_INIT(0); 1729 struct device *dev = &wacom->hdev->dev; 1730 struct power_supply_config psy_cfg = { .drv_data = battery, }; 1731 struct power_supply *ps_bat; 1732 struct power_supply_desc *bat_desc = &battery->bat_desc; 1733 unsigned long n; 1734 int error; 1735 1736 if (!devres_open_group(dev, bat_desc, GFP_KERNEL)) 1737 return -ENOMEM; 1738 1739 battery->wacom = wacom; 1740 1741 n = atomic_inc_return(&battery_no) - 1; 1742 1743 bat_desc->properties = wacom_battery_props; 1744 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props); 1745 bat_desc->get_property = wacom_battery_get_property; 1746 sprintf(battery->bat_name, "wacom_battery_%ld", n); 1747 bat_desc->name = battery->bat_name; 1748 bat_desc->type = POWER_SUPPLY_TYPE_USB; 1749 bat_desc->use_for_apm = 0; 1750 1751 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg); 1752 if (IS_ERR(ps_bat)) { 1753 error = PTR_ERR(ps_bat); 1754 goto err; 1755 } 1756 1757 power_supply_powers(ps_bat, &wacom->hdev->dev); 1758 1759 battery->battery = ps_bat; 1760 1761 devres_close_group(dev, bat_desc); 1762 return 0; 1763 1764 err: 1765 devres_release_group(dev, bat_desc); 1766 return error; 1767 } 1768 1769 static int wacom_initialize_battery(struct wacom *wacom) 1770 { 1771 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) 1772 return __wacom_initialize_battery(wacom, &wacom->battery); 1773 1774 return 0; 1775 } 1776 1777 static void wacom_destroy_battery(struct wacom *wacom) 1778 { 1779 if (wacom->battery.battery) { 1780 devres_release_group(&wacom->hdev->dev, 1781 &wacom->battery.bat_desc); 1782 wacom->battery.battery = NULL; 1783 } 1784 } 1785 1786 static ssize_t wacom_show_speed(struct device *dev, 1787 struct device_attribute 1788 *attr, char *buf) 1789 { 1790 struct hid_device *hdev = to_hid_device(dev); 1791 struct wacom *wacom = hid_get_drvdata(hdev); 1792 1793 return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed); 1794 } 1795 1796 static ssize_t wacom_store_speed(struct device *dev, 1797 struct device_attribute *attr, 1798 const char *buf, size_t count) 1799 { 1800 struct hid_device *hdev = to_hid_device(dev); 1801 struct wacom *wacom = hid_get_drvdata(hdev); 1802 u8 new_speed; 1803 1804 if (kstrtou8(buf, 0, &new_speed)) 1805 return -EINVAL; 1806 1807 if (new_speed != 0 && new_speed != 1) 1808 return -EINVAL; 1809 1810 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features); 1811 1812 return count; 1813 } 1814 1815 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM, 1816 wacom_show_speed, wacom_store_speed); 1817 1818 1819 static ssize_t wacom_show_remote_mode(struct kobject *kobj, 1820 struct kobj_attribute *kattr, 1821 char *buf, int index) 1822 { 1823 struct device *dev = kobj_to_dev(kobj->parent); 1824 struct hid_device *hdev = to_hid_device(dev); 1825 struct wacom *wacom = hid_get_drvdata(hdev); 1826 u8 mode; 1827 1828 mode = wacom->led.groups[index].select; 1829 return sprintf(buf, "%d\n", mode < 3 ? mode : -1); 1830 } 1831 1832 #define DEVICE_EKR_ATTR_GROUP(SET_ID) \ 1833 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \ 1834 struct kobj_attribute *kattr, char *buf) \ 1835 { \ 1836 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \ 1837 } \ 1838 static struct kobj_attribute remote##SET_ID##_mode_attr = { \ 1839 .attr = {.name = "remote_mode", \ 1840 .mode = DEV_ATTR_RO_PERM}, \ 1841 .show = wacom_show_remote##SET_ID##_mode, \ 1842 }; \ 1843 static struct attribute *remote##SET_ID##_serial_attrs[] = { \ 1844 &remote##SET_ID##_mode_attr.attr, \ 1845 NULL \ 1846 }; \ 1847 static struct attribute_group remote##SET_ID##_serial_group = { \ 1848 .name = NULL, \ 1849 .attrs = remote##SET_ID##_serial_attrs, \ 1850 } 1851 1852 DEVICE_EKR_ATTR_GROUP(0); 1853 DEVICE_EKR_ATTR_GROUP(1); 1854 DEVICE_EKR_ATTR_GROUP(2); 1855 DEVICE_EKR_ATTR_GROUP(3); 1856 DEVICE_EKR_ATTR_GROUP(4); 1857 1858 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial, 1859 int index) 1860 { 1861 int error = 0; 1862 struct wacom_remote *remote = wacom->remote; 1863 1864 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev, 1865 GFP_KERNEL, 1866 "%d", serial); 1867 if (!remote->remotes[index].group.name) 1868 return -ENOMEM; 1869 1870 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir, 1871 &remote->remotes[index].group); 1872 if (error) { 1873 remote->remotes[index].group.name = NULL; 1874 hid_err(wacom->hdev, 1875 "cannot create sysfs group err: %d\n", error); 1876 return error; 1877 } 1878 1879 return 0; 1880 } 1881 1882 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector) 1883 { 1884 const size_t buf_size = 2; 1885 unsigned char *buf; 1886 int retval; 1887 1888 buf = kzalloc(buf_size, GFP_KERNEL); 1889 if (!buf) 1890 return -ENOMEM; 1891 1892 buf[0] = WAC_CMD_DELETE_PAIRING; 1893 buf[1] = selector; 1894 1895 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf, 1896 buf_size, WAC_CMD_RETRIES); 1897 kfree(buf); 1898 1899 return retval; 1900 } 1901 1902 static ssize_t wacom_store_unpair_remote(struct kobject *kobj, 1903 struct kobj_attribute *attr, 1904 const char *buf, size_t count) 1905 { 1906 unsigned char selector = 0; 1907 struct device *dev = kobj_to_dev(kobj->parent); 1908 struct hid_device *hdev = to_hid_device(dev); 1909 struct wacom *wacom = hid_get_drvdata(hdev); 1910 int err; 1911 1912 if (!strncmp(buf, "*\n", 2)) { 1913 selector = WAC_CMD_UNPAIR_ALL; 1914 } else { 1915 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n", 1916 buf); 1917 return -1; 1918 } 1919 1920 mutex_lock(&wacom->lock); 1921 1922 err = wacom_cmd_unpair_remote(wacom, selector); 1923 mutex_unlock(&wacom->lock); 1924 1925 return err < 0 ? err : count; 1926 } 1927 1928 static struct kobj_attribute unpair_remote_attr = { 1929 .attr = {.name = "unpair_remote", .mode = 0200}, 1930 .store = wacom_store_unpair_remote, 1931 }; 1932 1933 static const struct attribute *remote_unpair_attrs[] = { 1934 &unpair_remote_attr.attr, 1935 NULL 1936 }; 1937 1938 static void wacom_remotes_destroy(void *data) 1939 { 1940 struct wacom *wacom = data; 1941 struct wacom_remote *remote = wacom->remote; 1942 1943 if (!remote) 1944 return; 1945 1946 kobject_put(remote->remote_dir); 1947 kfifo_free(&remote->remote_fifo); 1948 wacom->remote = NULL; 1949 } 1950 1951 static int wacom_initialize_remotes(struct wacom *wacom) 1952 { 1953 int error = 0; 1954 struct wacom_remote *remote; 1955 int i; 1956 1957 if (wacom->wacom_wac.features.type != REMOTE) 1958 return 0; 1959 1960 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote), 1961 GFP_KERNEL); 1962 if (!remote) 1963 return -ENOMEM; 1964 1965 wacom->remote = remote; 1966 1967 spin_lock_init(&remote->remote_lock); 1968 1969 error = kfifo_alloc(&remote->remote_fifo, 1970 5 * sizeof(struct wacom_remote_data), 1971 GFP_KERNEL); 1972 if (error) { 1973 hid_err(wacom->hdev, "failed allocating remote_fifo\n"); 1974 return -ENOMEM; 1975 } 1976 1977 remote->remotes[0].group = remote0_serial_group; 1978 remote->remotes[1].group = remote1_serial_group; 1979 remote->remotes[2].group = remote2_serial_group; 1980 remote->remotes[3].group = remote3_serial_group; 1981 remote->remotes[4].group = remote4_serial_group; 1982 1983 remote->remote_dir = kobject_create_and_add("wacom_remote", 1984 &wacom->hdev->dev.kobj); 1985 if (!remote->remote_dir) 1986 return -ENOMEM; 1987 1988 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs); 1989 1990 if (error) { 1991 hid_err(wacom->hdev, 1992 "cannot create sysfs group err: %d\n", error); 1993 return error; 1994 } 1995 1996 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 1997 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN; 1998 remote->remotes[i].serial = 0; 1999 } 2000 2001 error = devm_add_action_or_reset(&wacom->hdev->dev, 2002 wacom_remotes_destroy, wacom); 2003 if (error) 2004 return error; 2005 2006 return 0; 2007 } 2008 2009 static struct input_dev *wacom_allocate_input(struct wacom *wacom) 2010 { 2011 struct input_dev *input_dev; 2012 struct hid_device *hdev = wacom->hdev; 2013 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 2014 2015 input_dev = devm_input_allocate_device(&hdev->dev); 2016 if (!input_dev) 2017 return NULL; 2018 2019 input_dev->name = wacom_wac->features.name; 2020 input_dev->phys = hdev->phys; 2021 input_dev->dev.parent = &hdev->dev; 2022 input_dev->open = wacom_open; 2023 input_dev->close = wacom_close; 2024 input_dev->uniq = hdev->uniq; 2025 input_dev->id.bustype = hdev->bus; 2026 input_dev->id.vendor = hdev->vendor; 2027 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product; 2028 input_dev->id.version = hdev->version; 2029 input_set_drvdata(input_dev, wacom); 2030 2031 return input_dev; 2032 } 2033 2034 static int wacom_allocate_inputs(struct wacom *wacom) 2035 { 2036 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 2037 2038 wacom_wac->pen_input = wacom_allocate_input(wacom); 2039 wacom_wac->touch_input = wacom_allocate_input(wacom); 2040 wacom_wac->pad_input = wacom_allocate_input(wacom); 2041 if (!wacom_wac->pen_input || 2042 !wacom_wac->touch_input || 2043 !wacom_wac->pad_input) 2044 return -ENOMEM; 2045 2046 wacom_wac->pen_input->name = wacom_wac->pen_name; 2047 wacom_wac->touch_input->name = wacom_wac->touch_name; 2048 wacom_wac->pad_input->name = wacom_wac->pad_name; 2049 2050 return 0; 2051 } 2052 2053 static int wacom_register_inputs(struct wacom *wacom) 2054 { 2055 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev; 2056 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 2057 int error = 0; 2058 2059 pen_input_dev = wacom_wac->pen_input; 2060 touch_input_dev = wacom_wac->touch_input; 2061 pad_input_dev = wacom_wac->pad_input; 2062 2063 if (!pen_input_dev || !touch_input_dev || !pad_input_dev) 2064 return -EINVAL; 2065 2066 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac); 2067 if (error) { 2068 /* no pen in use on this interface */ 2069 input_free_device(pen_input_dev); 2070 wacom_wac->pen_input = NULL; 2071 pen_input_dev = NULL; 2072 } else { 2073 error = input_register_device(pen_input_dev); 2074 if (error) 2075 goto fail; 2076 } 2077 2078 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac); 2079 if (error) { 2080 /* no touch in use on this interface */ 2081 input_free_device(touch_input_dev); 2082 wacom_wac->touch_input = NULL; 2083 touch_input_dev = NULL; 2084 } else { 2085 error = input_register_device(touch_input_dev); 2086 if (error) 2087 goto fail; 2088 } 2089 2090 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac); 2091 if (error) { 2092 /* no pad in use on this interface */ 2093 input_free_device(pad_input_dev); 2094 wacom_wac->pad_input = NULL; 2095 pad_input_dev = NULL; 2096 } else { 2097 error = input_register_device(pad_input_dev); 2098 if (error) 2099 goto fail; 2100 } 2101 2102 return 0; 2103 2104 fail: 2105 wacom_wac->pad_input = NULL; 2106 wacom_wac->touch_input = NULL; 2107 wacom_wac->pen_input = NULL; 2108 return error; 2109 } 2110 2111 /* 2112 * Not all devices report physical dimensions from HID. 2113 * Compute the default from hardcoded logical dimension 2114 * and resolution before driver overwrites them. 2115 */ 2116 static void wacom_set_default_phy(struct wacom_features *features) 2117 { 2118 if (features->x_resolution) { 2119 features->x_phy = (features->x_max * 100) / 2120 features->x_resolution; 2121 features->y_phy = (features->y_max * 100) / 2122 features->y_resolution; 2123 } 2124 } 2125 2126 static void wacom_calculate_res(struct wacom_features *features) 2127 { 2128 /* set unit to "100th of a mm" for devices not reported by HID */ 2129 if (!features->unit) { 2130 features->unit = 0x11; 2131 features->unitExpo = -3; 2132 } 2133 2134 features->x_resolution = wacom_calc_hid_res(features->x_max, 2135 features->x_phy, 2136 features->unit, 2137 features->unitExpo); 2138 features->y_resolution = wacom_calc_hid_res(features->y_max, 2139 features->y_phy, 2140 features->unit, 2141 features->unitExpo); 2142 } 2143 2144 void wacom_battery_work(struct work_struct *work) 2145 { 2146 struct wacom *wacom = container_of(work, struct wacom, battery_work); 2147 2148 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && 2149 !wacom->battery.battery) { 2150 wacom_initialize_battery(wacom); 2151 } 2152 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && 2153 wacom->battery.battery) { 2154 wacom_destroy_battery(wacom); 2155 } 2156 } 2157 2158 static size_t wacom_compute_pktlen(struct hid_device *hdev) 2159 { 2160 struct hid_report_enum *report_enum; 2161 struct hid_report *report; 2162 size_t size = 0; 2163 2164 report_enum = hdev->report_enum + HID_INPUT_REPORT; 2165 2166 list_for_each_entry(report, &report_enum->report_list, list) { 2167 size_t report_size = hid_report_len(report); 2168 if (report_size > size) 2169 size = report_size; 2170 } 2171 2172 return size; 2173 } 2174 2175 static void wacom_update_name(struct wacom *wacom, const char *suffix) 2176 { 2177 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2178 struct wacom_features *features = &wacom_wac->features; 2179 char name[WACOM_NAME_MAX]; 2180 2181 /* Generic devices name unspecified */ 2182 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) { 2183 char *product_name = wacom->hdev->name; 2184 2185 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) { 2186 struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent); 2187 struct usb_device *dev = interface_to_usbdev(intf); 2188 product_name = dev->product; 2189 } 2190 2191 if (wacom->hdev->bus == BUS_I2C) { 2192 snprintf(name, sizeof(name), "%s %X", 2193 features->name, wacom->hdev->product); 2194 } else if (strstr(product_name, "Wacom") || 2195 strstr(product_name, "wacom") || 2196 strstr(product_name, "WACOM")) { 2197 strlcpy(name, product_name, sizeof(name)); 2198 } else { 2199 snprintf(name, sizeof(name), "Wacom %s", product_name); 2200 } 2201 2202 /* strip out excess whitespaces */ 2203 while (1) { 2204 char *gap = strstr(name, " "); 2205 if (gap == NULL) 2206 break; 2207 /* shift everything including the terminator */ 2208 memmove(gap, gap+1, strlen(gap)); 2209 } 2210 2211 /* get rid of trailing whitespace */ 2212 if (name[strlen(name)-1] == ' ') 2213 name[strlen(name)-1] = '\0'; 2214 } else { 2215 strlcpy(name, features->name, sizeof(name)); 2216 } 2217 2218 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s", 2219 name, suffix); 2220 2221 /* Append the device type to the name */ 2222 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name), 2223 "%s%s Pen", name, suffix); 2224 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name), 2225 "%s%s Finger", name, suffix); 2226 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name), 2227 "%s%s Pad", name, suffix); 2228 } 2229 2230 static void wacom_release_resources(struct wacom *wacom) 2231 { 2232 struct hid_device *hdev = wacom->hdev; 2233 2234 if (!wacom->resources) 2235 return; 2236 2237 devres_release_group(&hdev->dev, wacom); 2238 2239 wacom->resources = false; 2240 2241 wacom->wacom_wac.pen_input = NULL; 2242 wacom->wacom_wac.touch_input = NULL; 2243 wacom->wacom_wac.pad_input = NULL; 2244 } 2245 2246 static void wacom_set_shared_values(struct wacom_wac *wacom_wac) 2247 { 2248 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) { 2249 wacom_wac->shared->type = wacom_wac->features.type; 2250 wacom_wac->shared->touch_input = wacom_wac->touch_input; 2251 } 2252 2253 if (wacom_wac->has_mute_touch_switch) { 2254 wacom_wac->shared->has_mute_touch_switch = true; 2255 wacom_wac->shared->is_touch_on = true; 2256 } 2257 2258 if (wacom_wac->shared->has_mute_touch_switch && 2259 wacom_wac->shared->touch_input) { 2260 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit); 2261 input_set_capability(wacom_wac->shared->touch_input, EV_SW, 2262 SW_MUTE_DEVICE); 2263 } 2264 } 2265 2266 static int wacom_parse_and_register(struct wacom *wacom, bool wireless) 2267 { 2268 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2269 struct wacom_features *features = &wacom_wac->features; 2270 struct hid_device *hdev = wacom->hdev; 2271 int error; 2272 unsigned int connect_mask = HID_CONNECT_HIDRAW; 2273 2274 features->pktlen = wacom_compute_pktlen(hdev); 2275 if (features->pktlen > WACOM_PKGLEN_MAX) 2276 return -EINVAL; 2277 2278 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL)) 2279 return -ENOMEM; 2280 2281 wacom->resources = true; 2282 2283 error = wacom_allocate_inputs(wacom); 2284 if (error) 2285 goto fail; 2286 2287 /* 2288 * Bamboo Pad has a generic hid handling for the Pen, and we switch it 2289 * into debug mode for the touch part. 2290 * We ignore the other interfaces. 2291 */ 2292 if (features->type == BAMBOO_PAD) { 2293 if (features->pktlen == WACOM_PKGLEN_PENABLED) { 2294 features->type = HID_GENERIC; 2295 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) && 2296 (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) { 2297 error = -ENODEV; 2298 goto fail; 2299 } 2300 } 2301 2302 /* set the default size in case we do not get them from hid */ 2303 wacom_set_default_phy(features); 2304 2305 /* Retrieve the physical and logical size for touch devices */ 2306 wacom_retrieve_hid_descriptor(hdev, features); 2307 wacom_setup_device_quirks(wacom); 2308 2309 if (features->device_type == WACOM_DEVICETYPE_NONE && 2310 features->type != WIRELESS) { 2311 error = features->type == HID_GENERIC ? -ENODEV : 0; 2312 2313 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.", 2314 hdev->name, 2315 error ? "Ignoring" : "Assuming pen"); 2316 2317 if (error) 2318 goto fail; 2319 2320 features->device_type |= WACOM_DEVICETYPE_PEN; 2321 } 2322 2323 wacom_calculate_res(features); 2324 2325 wacom_update_name(wacom, wireless ? " (WL)" : ""); 2326 2327 /* pen only Bamboo neither support touch nor pad */ 2328 if ((features->type == BAMBOO_PEN) && 2329 ((features->device_type & WACOM_DEVICETYPE_TOUCH) || 2330 (features->device_type & WACOM_DEVICETYPE_PAD))) { 2331 error = -ENODEV; 2332 goto fail; 2333 } 2334 2335 error = wacom_add_shared_data(hdev); 2336 if (error) 2337 goto fail; 2338 2339 if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) && 2340 (features->quirks & WACOM_QUIRK_BATTERY)) { 2341 error = wacom_initialize_battery(wacom); 2342 if (error) 2343 goto fail; 2344 } 2345 2346 error = wacom_register_inputs(wacom); 2347 if (error) 2348 goto fail; 2349 2350 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) { 2351 error = wacom_initialize_leds(wacom); 2352 if (error) 2353 goto fail; 2354 2355 error = wacom_initialize_remotes(wacom); 2356 if (error) 2357 goto fail; 2358 } 2359 2360 if (features->type == HID_GENERIC) 2361 connect_mask |= HID_CONNECT_DRIVER; 2362 2363 /* Regular HID work starts now */ 2364 error = hid_hw_start(hdev, connect_mask); 2365 if (error) { 2366 hid_err(hdev, "hw start failed\n"); 2367 goto fail; 2368 } 2369 2370 if (!wireless) { 2371 /* Note that if query fails it is not a hard failure */ 2372 wacom_query_tablet_data(wacom); 2373 } 2374 2375 /* touch only Bamboo doesn't support pen */ 2376 if ((features->type == BAMBOO_TOUCH) && 2377 (features->device_type & WACOM_DEVICETYPE_PEN)) { 2378 cancel_delayed_work_sync(&wacom->init_work); 2379 _wacom_query_tablet_data(wacom); 2380 error = -ENODEV; 2381 goto fail_quirks; 2382 } 2383 2384 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) 2385 error = hid_hw_open(hdev); 2386 2387 wacom_set_shared_values(wacom_wac); 2388 devres_close_group(&hdev->dev, wacom); 2389 2390 return 0; 2391 2392 fail_quirks: 2393 hid_hw_stop(hdev); 2394 fail: 2395 wacom_release_resources(wacom); 2396 return error; 2397 } 2398 2399 static void wacom_wireless_work(struct work_struct *work) 2400 { 2401 struct wacom *wacom = container_of(work, struct wacom, wireless_work); 2402 struct usb_device *usbdev = wacom->usbdev; 2403 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2404 struct hid_device *hdev1, *hdev2; 2405 struct wacom *wacom1, *wacom2; 2406 struct wacom_wac *wacom_wac1, *wacom_wac2; 2407 int error; 2408 2409 /* 2410 * Regardless if this is a disconnect or a new tablet, 2411 * remove any existing input and battery devices. 2412 */ 2413 2414 wacom_destroy_battery(wacom); 2415 2416 /* Stylus interface */ 2417 hdev1 = usb_get_intfdata(usbdev->config->interface[1]); 2418 wacom1 = hid_get_drvdata(hdev1); 2419 wacom_wac1 = &(wacom1->wacom_wac); 2420 wacom_release_resources(wacom1); 2421 2422 /* Touch interface */ 2423 hdev2 = usb_get_intfdata(usbdev->config->interface[2]); 2424 wacom2 = hid_get_drvdata(hdev2); 2425 wacom_wac2 = &(wacom2->wacom_wac); 2426 wacom_release_resources(wacom2); 2427 2428 if (wacom_wac->pid == 0) { 2429 hid_info(wacom->hdev, "wireless tablet disconnected\n"); 2430 } else { 2431 const struct hid_device_id *id = wacom_ids; 2432 2433 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n", 2434 wacom_wac->pid); 2435 2436 while (id->bus) { 2437 if (id->vendor == USB_VENDOR_ID_WACOM && 2438 id->product == wacom_wac->pid) 2439 break; 2440 id++; 2441 } 2442 2443 if (!id->bus) { 2444 hid_info(wacom->hdev, "ignoring unknown PID.\n"); 2445 return; 2446 } 2447 2448 /* Stylus interface */ 2449 wacom_wac1->features = 2450 *((struct wacom_features *)id->driver_data); 2451 2452 wacom_wac1->pid = wacom_wac->pid; 2453 hid_hw_stop(hdev1); 2454 error = wacom_parse_and_register(wacom1, true); 2455 if (error) 2456 goto fail; 2457 2458 /* Touch interface */ 2459 if (wacom_wac1->features.touch_max || 2460 (wacom_wac1->features.type >= INTUOSHT && 2461 wacom_wac1->features.type <= BAMBOO_PT)) { 2462 wacom_wac2->features = 2463 *((struct wacom_features *)id->driver_data); 2464 wacom_wac2->pid = wacom_wac->pid; 2465 hid_hw_stop(hdev2); 2466 error = wacom_parse_and_register(wacom2, true); 2467 if (error) 2468 goto fail; 2469 } 2470 2471 strlcpy(wacom_wac->name, wacom_wac1->name, 2472 sizeof(wacom_wac->name)); 2473 error = wacom_initialize_battery(wacom); 2474 if (error) 2475 goto fail; 2476 } 2477 2478 return; 2479 2480 fail: 2481 wacom_release_resources(wacom1); 2482 wacom_release_resources(wacom2); 2483 return; 2484 } 2485 2486 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index) 2487 { 2488 struct wacom_remote *remote = wacom->remote; 2489 u32 serial = remote->remotes[index].serial; 2490 int i; 2491 unsigned long flags; 2492 2493 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 2494 if (remote->remotes[i].serial == serial) { 2495 2496 spin_lock_irqsave(&remote->remote_lock, flags); 2497 remote->remotes[i].registered = false; 2498 spin_unlock_irqrestore(&remote->remote_lock, flags); 2499 2500 if (remote->remotes[i].battery.battery) 2501 devres_release_group(&wacom->hdev->dev, 2502 &remote->remotes[i].battery.bat_desc); 2503 2504 if (remote->remotes[i].group.name) 2505 devres_release_group(&wacom->hdev->dev, 2506 &remote->remotes[i]); 2507 2508 remote->remotes[i].serial = 0; 2509 remote->remotes[i].group.name = NULL; 2510 remote->remotes[i].battery.battery = NULL; 2511 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN; 2512 } 2513 } 2514 } 2515 2516 static int wacom_remote_create_one(struct wacom *wacom, u32 serial, 2517 unsigned int index) 2518 { 2519 struct wacom_remote *remote = wacom->remote; 2520 struct device *dev = &wacom->hdev->dev; 2521 int error, k; 2522 2523 /* A remote can pair more than once with an EKR, 2524 * check to make sure this serial isn't already paired. 2525 */ 2526 for (k = 0; k < WACOM_MAX_REMOTES; k++) { 2527 if (remote->remotes[k].serial == serial) 2528 break; 2529 } 2530 2531 if (k < WACOM_MAX_REMOTES) { 2532 remote->remotes[index].serial = serial; 2533 return 0; 2534 } 2535 2536 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL)) 2537 return -ENOMEM; 2538 2539 error = wacom_remote_create_attr_group(wacom, serial, index); 2540 if (error) 2541 goto fail; 2542 2543 remote->remotes[index].input = wacom_allocate_input(wacom); 2544 if (!remote->remotes[index].input) { 2545 error = -ENOMEM; 2546 goto fail; 2547 } 2548 remote->remotes[index].input->uniq = remote->remotes[index].group.name; 2549 remote->remotes[index].input->name = wacom->wacom_wac.pad_name; 2550 2551 if (!remote->remotes[index].input->name) { 2552 error = -EINVAL; 2553 goto fail; 2554 } 2555 2556 error = wacom_setup_pad_input_capabilities(remote->remotes[index].input, 2557 &wacom->wacom_wac); 2558 if (error) 2559 goto fail; 2560 2561 remote->remotes[index].serial = serial; 2562 2563 error = input_register_device(remote->remotes[index].input); 2564 if (error) 2565 goto fail; 2566 2567 error = wacom_led_groups_alloc_and_register_one( 2568 &remote->remotes[index].input->dev, 2569 wacom, index, 3, true); 2570 if (error) 2571 goto fail; 2572 2573 remote->remotes[index].registered = true; 2574 2575 devres_close_group(dev, &remote->remotes[index]); 2576 return 0; 2577 2578 fail: 2579 devres_release_group(dev, &remote->remotes[index]); 2580 remote->remotes[index].serial = 0; 2581 return error; 2582 } 2583 2584 static int wacom_remote_attach_battery(struct wacom *wacom, int index) 2585 { 2586 struct wacom_remote *remote = wacom->remote; 2587 int error; 2588 2589 if (!remote->remotes[index].registered) 2590 return 0; 2591 2592 if (remote->remotes[index].battery.battery) 2593 return 0; 2594 2595 if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN) 2596 return 0; 2597 2598 error = __wacom_initialize_battery(wacom, 2599 &wacom->remote->remotes[index].battery); 2600 if (error) 2601 return error; 2602 2603 return 0; 2604 } 2605 2606 static void wacom_remote_work(struct work_struct *work) 2607 { 2608 struct wacom *wacom = container_of(work, struct wacom, remote_work); 2609 struct wacom_remote *remote = wacom->remote; 2610 struct wacom_remote_data data; 2611 unsigned long flags; 2612 unsigned int count; 2613 u32 serial; 2614 int i; 2615 2616 spin_lock_irqsave(&remote->remote_lock, flags); 2617 2618 count = kfifo_out(&remote->remote_fifo, &data, sizeof(data)); 2619 2620 if (count != sizeof(data)) { 2621 hid_err(wacom->hdev, 2622 "workitem triggered without status available\n"); 2623 spin_unlock_irqrestore(&remote->remote_lock, flags); 2624 return; 2625 } 2626 2627 if (!kfifo_is_empty(&remote->remote_fifo)) 2628 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE); 2629 2630 spin_unlock_irqrestore(&remote->remote_lock, flags); 2631 2632 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 2633 serial = data.remote[i].serial; 2634 if (data.remote[i].connected) { 2635 2636 if (remote->remotes[i].serial == serial) { 2637 wacom_remote_attach_battery(wacom, i); 2638 continue; 2639 } 2640 2641 if (remote->remotes[i].serial) 2642 wacom_remote_destroy_one(wacom, i); 2643 2644 wacom_remote_create_one(wacom, serial, i); 2645 2646 } else if (remote->remotes[i].serial) { 2647 wacom_remote_destroy_one(wacom, i); 2648 } 2649 } 2650 } 2651 2652 static void wacom_mode_change_work(struct work_struct *work) 2653 { 2654 struct wacom *wacom = container_of(work, struct wacom, mode_change_work); 2655 struct wacom_shared *shared = wacom->wacom_wac.shared; 2656 struct wacom *wacom1 = NULL; 2657 struct wacom *wacom2 = NULL; 2658 bool is_direct = wacom->wacom_wac.is_direct_mode; 2659 int error = 0; 2660 2661 if (shared->pen) { 2662 wacom1 = hid_get_drvdata(shared->pen); 2663 wacom_release_resources(wacom1); 2664 hid_hw_stop(wacom1->hdev); 2665 wacom1->wacom_wac.has_mode_change = true; 2666 wacom1->wacom_wac.is_direct_mode = is_direct; 2667 } 2668 2669 if (shared->touch) { 2670 wacom2 = hid_get_drvdata(shared->touch); 2671 wacom_release_resources(wacom2); 2672 hid_hw_stop(wacom2->hdev); 2673 wacom2->wacom_wac.has_mode_change = true; 2674 wacom2->wacom_wac.is_direct_mode = is_direct; 2675 } 2676 2677 if (wacom1) { 2678 error = wacom_parse_and_register(wacom1, false); 2679 if (error) 2680 return; 2681 } 2682 2683 if (wacom2) { 2684 error = wacom_parse_and_register(wacom2, false); 2685 if (error) 2686 return; 2687 } 2688 2689 return; 2690 } 2691 2692 static int wacom_probe(struct hid_device *hdev, 2693 const struct hid_device_id *id) 2694 { 2695 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 2696 struct usb_device *dev = interface_to_usbdev(intf); 2697 struct wacom *wacom; 2698 struct wacom_wac *wacom_wac; 2699 struct wacom_features *features; 2700 int error; 2701 2702 if (!id->driver_data) 2703 return -EINVAL; 2704 2705 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; 2706 2707 /* hid-core sets this quirk for the boot interface */ 2708 hdev->quirks &= ~HID_QUIRK_NOGET; 2709 2710 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL); 2711 if (!wacom) 2712 return -ENOMEM; 2713 2714 hid_set_drvdata(hdev, wacom); 2715 wacom->hdev = hdev; 2716 2717 wacom_wac = &wacom->wacom_wac; 2718 wacom_wac->features = *((struct wacom_features *)id->driver_data); 2719 features = &wacom_wac->features; 2720 2721 if (features->check_for_hid_type && features->hid_type != hdev->type) { 2722 error = -ENODEV; 2723 goto fail; 2724 } 2725 2726 error = kfifo_alloc(&wacom_wac->pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL); 2727 if (error) 2728 goto fail; 2729 2730 wacom_wac->hid_data.inputmode = -1; 2731 wacom_wac->mode_report = -1; 2732 2733 wacom->usbdev = dev; 2734 wacom->intf = intf; 2735 mutex_init(&wacom->lock); 2736 INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work); 2737 INIT_WORK(&wacom->wireless_work, wacom_wireless_work); 2738 INIT_WORK(&wacom->battery_work, wacom_battery_work); 2739 INIT_WORK(&wacom->remote_work, wacom_remote_work); 2740 INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work); 2741 2742 /* ask for the report descriptor to be loaded by HID */ 2743 error = hid_parse(hdev); 2744 if (error) { 2745 hid_err(hdev, "parse failed\n"); 2746 goto fail; 2747 } 2748 2749 error = wacom_parse_and_register(wacom, false); 2750 if (error) 2751 goto fail; 2752 2753 if (hdev->bus == BUS_BLUETOOTH) { 2754 error = device_create_file(&hdev->dev, &dev_attr_speed); 2755 if (error) 2756 hid_warn(hdev, 2757 "can't create sysfs speed attribute err: %d\n", 2758 error); 2759 } 2760 2761 return 0; 2762 2763 fail: 2764 hid_set_drvdata(hdev, NULL); 2765 return error; 2766 } 2767 2768 static void wacom_remove(struct hid_device *hdev) 2769 { 2770 struct wacom *wacom = hid_get_drvdata(hdev); 2771 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2772 struct wacom_features *features = &wacom_wac->features; 2773 2774 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) 2775 hid_hw_close(hdev); 2776 2777 hid_hw_stop(hdev); 2778 2779 cancel_delayed_work_sync(&wacom->init_work); 2780 cancel_work_sync(&wacom->wireless_work); 2781 cancel_work_sync(&wacom->battery_work); 2782 cancel_work_sync(&wacom->remote_work); 2783 cancel_work_sync(&wacom->mode_change_work); 2784 if (hdev->bus == BUS_BLUETOOTH) 2785 device_remove_file(&hdev->dev, &dev_attr_speed); 2786 2787 /* make sure we don't trigger the LEDs */ 2788 wacom_led_groups_release(wacom); 2789 2790 if (wacom->wacom_wac.features.type != REMOTE) 2791 wacom_release_resources(wacom); 2792 2793 kfifo_free(&wacom_wac->pen_fifo); 2794 2795 hid_set_drvdata(hdev, NULL); 2796 } 2797 2798 #ifdef CONFIG_PM 2799 static int wacom_resume(struct hid_device *hdev) 2800 { 2801 struct wacom *wacom = hid_get_drvdata(hdev); 2802 2803 mutex_lock(&wacom->lock); 2804 2805 /* switch to wacom mode first */ 2806 _wacom_query_tablet_data(wacom); 2807 wacom_led_control(wacom); 2808 2809 mutex_unlock(&wacom->lock); 2810 2811 return 0; 2812 } 2813 2814 static int wacom_reset_resume(struct hid_device *hdev) 2815 { 2816 return wacom_resume(hdev); 2817 } 2818 #endif /* CONFIG_PM */ 2819 2820 static struct hid_driver wacom_driver = { 2821 .name = "wacom", 2822 .id_table = wacom_ids, 2823 .probe = wacom_probe, 2824 .remove = wacom_remove, 2825 .report = wacom_wac_report, 2826 #ifdef CONFIG_PM 2827 .resume = wacom_resume, 2828 .reset_resume = wacom_reset_resume, 2829 #endif 2830 .raw_event = wacom_raw_event, 2831 }; 2832 module_hid_driver(wacom_driver); 2833 2834 MODULE_VERSION(DRIVER_VERSION); 2835 MODULE_AUTHOR(DRIVER_AUTHOR); 2836 MODULE_DESCRIPTION(DRIVER_DESC); 2837 MODULE_LICENSE("GPL"); 2838