1 /* 2 * drivers/input/tablet/wacom_sys.c 3 * 4 * USB Wacom tablet support - system specific code 5 */ 6 7 /* 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 */ 13 14 #include "wacom_wac.h" 15 #include "wacom.h" 16 #include <linux/input/mt.h> 17 18 #define WAC_MSG_RETRIES 5 19 20 #define WAC_CMD_WL_LED_CONTROL 0x03 21 #define WAC_CMD_LED_CONTROL 0x20 22 #define WAC_CMD_ICON_START 0x21 23 #define WAC_CMD_ICON_XFER 0x23 24 #define WAC_CMD_ICON_BT_XFER 0x26 25 #define WAC_CMD_RETRIES 10 26 #define WAC_CMD_DELETE_PAIRING 0x20 27 #define WAC_CMD_UNPAIR_ALL 0xFF 28 29 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP) 30 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP) 31 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP) 32 33 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf, 34 size_t size, unsigned int retries) 35 { 36 int retval; 37 38 do { 39 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type, 40 HID_REQ_GET_REPORT); 41 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries); 42 43 if (retval < 0) 44 hid_err(hdev, "wacom_get_report: ran out of retries " 45 "(last error = %d)\n", retval); 46 47 return retval; 48 } 49 50 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf, 51 size_t size, unsigned int retries) 52 { 53 int retval; 54 55 do { 56 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type, 57 HID_REQ_SET_REPORT); 58 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries); 59 60 if (retval < 0) 61 hid_err(hdev, "wacom_set_report: ran out of retries " 62 "(last error = %d)\n", retval); 63 64 return retval; 65 } 66 67 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report, 68 u8 *raw_data, int size) 69 { 70 struct wacom *wacom = hid_get_drvdata(hdev); 71 72 if (size > WACOM_PKGLEN_MAX) 73 return 1; 74 75 memcpy(wacom->wacom_wac.data, raw_data, size); 76 77 wacom_wac_irq(&wacom->wacom_wac, size); 78 79 return 0; 80 } 81 82 static int wacom_open(struct input_dev *dev) 83 { 84 struct wacom *wacom = input_get_drvdata(dev); 85 86 return hid_hw_open(wacom->hdev); 87 } 88 89 static void wacom_close(struct input_dev *dev) 90 { 91 struct wacom *wacom = input_get_drvdata(dev); 92 93 /* 94 * wacom->hdev should never be null, but surprisingly, I had the case 95 * once while unplugging the Wacom Wireless Receiver. 96 */ 97 if (wacom->hdev) 98 hid_hw_close(wacom->hdev); 99 } 100 101 /* 102 * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res. 103 */ 104 static int wacom_calc_hid_res(int logical_extents, int physical_extents, 105 unsigned unit, int exponent) 106 { 107 struct hid_field field = { 108 .logical_maximum = logical_extents, 109 .physical_maximum = physical_extents, 110 .unit = unit, 111 .unit_exponent = exponent, 112 }; 113 114 return hidinput_calc_abs_res(&field, ABS_X); 115 } 116 117 static void wacom_feature_mapping(struct hid_device *hdev, 118 struct hid_field *field, struct hid_usage *usage) 119 { 120 struct wacom *wacom = hid_get_drvdata(hdev); 121 struct wacom_features *features = &wacom->wacom_wac.features; 122 struct hid_data *hid_data = &wacom->wacom_wac.hid_data; 123 u8 *data; 124 int ret; 125 int n; 126 127 switch (usage->hid) { 128 case HID_DG_CONTACTMAX: 129 /* leave touch_max as is if predefined */ 130 if (!features->touch_max) { 131 /* read manually */ 132 data = kzalloc(2, GFP_KERNEL); 133 if (!data) 134 break; 135 data[0] = field->report->id; 136 ret = wacom_get_report(hdev, HID_FEATURE_REPORT, 137 data, 2, WAC_CMD_RETRIES); 138 if (ret == 2) { 139 features->touch_max = data[1]; 140 } else { 141 features->touch_max = 16; 142 hid_warn(hdev, "wacom_feature_mapping: " 143 "could not get HID_DG_CONTACTMAX, " 144 "defaulting to %d\n", 145 features->touch_max); 146 } 147 kfree(data); 148 } 149 break; 150 case HID_DG_INPUTMODE: 151 /* Ignore if value index is out of bounds. */ 152 if (usage->usage_index >= field->report_count) { 153 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n"); 154 break; 155 } 156 157 hid_data->inputmode = field->report->id; 158 hid_data->inputmode_index = usage->usage_index; 159 break; 160 161 case HID_UP_DIGITIZER: 162 if (field->report->id == 0x0B && 163 (field->application == WACOM_HID_G9_PEN || 164 field->application == WACOM_HID_G11_PEN)) { 165 wacom->wacom_wac.mode_report = field->report->id; 166 wacom->wacom_wac.mode_value = 0; 167 } 168 break; 169 170 case WACOM_HID_WD_DATAMODE: 171 wacom->wacom_wac.mode_report = field->report->id; 172 wacom->wacom_wac.mode_value = 2; 173 break; 174 175 case WACOM_HID_UP_G9: 176 case WACOM_HID_UP_G11: 177 if (field->report->id == 0x03 && 178 (field->application == WACOM_HID_G9_TOUCHSCREEN || 179 field->application == WACOM_HID_G11_TOUCHSCREEN)) { 180 wacom->wacom_wac.mode_report = field->report->id; 181 wacom->wacom_wac.mode_value = 0; 182 } 183 break; 184 case WACOM_HID_WD_OFFSETLEFT: 185 case WACOM_HID_WD_OFFSETTOP: 186 case WACOM_HID_WD_OFFSETRIGHT: 187 case WACOM_HID_WD_OFFSETBOTTOM: 188 /* read manually */ 189 n = hid_report_len(field->report); 190 data = hid_alloc_report_buf(field->report, GFP_KERNEL); 191 if (!data) 192 break; 193 data[0] = field->report->id; 194 ret = wacom_get_report(hdev, HID_FEATURE_REPORT, 195 data, n, WAC_CMD_RETRIES); 196 if (ret == n) { 197 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, 198 data, n, 0); 199 } else { 200 hid_warn(hdev, "%s: could not retrieve sensor offsets\n", 201 __func__); 202 } 203 kfree(data); 204 break; 205 } 206 } 207 208 /* 209 * Interface Descriptor of wacom devices can be incomplete and 210 * inconsistent so wacom_features table is used to store stylus 211 * device's packet lengths, various maximum values, and tablet 212 * resolution based on product ID's. 213 * 214 * For devices that contain 2 interfaces, wacom_features table is 215 * inaccurate for the touch interface. Since the Interface Descriptor 216 * for touch interfaces has pretty complete data, this function exists 217 * to query tablet for this missing information instead of hard coding in 218 * an additional table. 219 * 220 * A typical Interface Descriptor for a stylus will contain a 221 * boot mouse application collection that is not of interest and this 222 * function will ignore it. 223 * 224 * It also contains a digitizer application collection that also is not 225 * of interest since any information it contains would be duplicate 226 * of what is in wacom_features. Usually it defines a report of an array 227 * of bytes that could be used as max length of the stylus packet returned. 228 * If it happens to define a Digitizer-Stylus Physical Collection then 229 * the X and Y logical values contain valid data but it is ignored. 230 * 231 * A typical Interface Descriptor for a touch interface will contain a 232 * Digitizer-Finger Physical Collection which will define both logical 233 * X/Y maximum as well as the physical size of tablet. Since touch 234 * interfaces haven't supported pressure or distance, this is enough 235 * information to override invalid values in the wacom_features table. 236 * 237 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful 238 * data. We deal with them after returning from this function. 239 */ 240 static void wacom_usage_mapping(struct hid_device *hdev, 241 struct hid_field *field, struct hid_usage *usage) 242 { 243 struct wacom *wacom = hid_get_drvdata(hdev); 244 struct wacom_features *features = &wacom->wacom_wac.features; 245 bool finger = WACOM_FINGER_FIELD(field); 246 bool pen = WACOM_PEN_FIELD(field); 247 248 /* 249 * Requiring Stylus Usage will ignore boot mouse 250 * X/Y values and some cases of invalid Digitizer X/Y 251 * values commonly reported. 252 */ 253 if (pen) 254 features->device_type |= WACOM_DEVICETYPE_PEN; 255 else if (finger) 256 features->device_type |= WACOM_DEVICETYPE_TOUCH; 257 else 258 return; 259 260 /* 261 * Bamboo models do not support HID_DG_CONTACTMAX. 262 * And, Bamboo Pen only descriptor contains touch. 263 */ 264 if (features->type > BAMBOO_PT) { 265 /* ISDv4 touch devices at least supports one touch point */ 266 if (finger && !features->touch_max) 267 features->touch_max = 1; 268 } 269 270 /* 271 * ISDv4 devices which predate HID's adoption of the 272 * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its 273 * position instead. We can accurately detect if a 274 * usage with that value should be HID_DG_BARRELSWITCH2 275 * based on the surrounding usages, which have remained 276 * constant across generations. 277 */ 278 if (features->type == HID_GENERIC && 279 usage->hid == 0x000D0000 && 280 field->application == HID_DG_PEN && 281 field->physical == HID_DG_STYLUS) { 282 int i = usage->usage_index; 283 284 if (i-4 >= 0 && i+1 < field->maxusage && 285 field->usage[i-4].hid == HID_DG_TIPSWITCH && 286 field->usage[i-3].hid == HID_DG_BARRELSWITCH && 287 field->usage[i-2].hid == HID_DG_ERASER && 288 field->usage[i-1].hid == HID_DG_INVERT && 289 field->usage[i+1].hid == HID_DG_INRANGE) { 290 usage->hid = HID_DG_BARRELSWITCH2; 291 } 292 } 293 294 switch (usage->hid) { 295 case HID_GD_X: 296 features->x_max = field->logical_maximum; 297 if (finger) { 298 features->x_phy = field->physical_maximum; 299 if ((features->type != BAMBOO_PT) && 300 (features->type != BAMBOO_TOUCH)) { 301 features->unit = field->unit; 302 features->unitExpo = field->unit_exponent; 303 } 304 } 305 break; 306 case HID_GD_Y: 307 features->y_max = field->logical_maximum; 308 if (finger) { 309 features->y_phy = field->physical_maximum; 310 if ((features->type != BAMBOO_PT) && 311 (features->type != BAMBOO_TOUCH)) { 312 features->unit = field->unit; 313 features->unitExpo = field->unit_exponent; 314 } 315 } 316 break; 317 case HID_DG_TIPPRESSURE: 318 if (pen) 319 features->pressure_max = field->logical_maximum; 320 break; 321 } 322 323 if (features->type == HID_GENERIC) 324 wacom_wac_usage_mapping(hdev, field, usage); 325 } 326 327 static void wacom_post_parse_hid(struct hid_device *hdev, 328 struct wacom_features *features) 329 { 330 struct wacom *wacom = hid_get_drvdata(hdev); 331 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 332 333 if (features->type == HID_GENERIC) { 334 /* Any last-minute generic device setup */ 335 if (features->touch_max > 1) { 336 input_mt_init_slots(wacom_wac->touch_input, wacom_wac->features.touch_max, 337 INPUT_MT_DIRECT); 338 } 339 } 340 } 341 342 static void wacom_parse_hid(struct hid_device *hdev, 343 struct wacom_features *features) 344 { 345 struct hid_report_enum *rep_enum; 346 struct hid_report *hreport; 347 int i, j; 348 349 /* check features first */ 350 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT]; 351 list_for_each_entry(hreport, &rep_enum->report_list, list) { 352 for (i = 0; i < hreport->maxfield; i++) { 353 /* Ignore if report count is out of bounds. */ 354 if (hreport->field[i]->report_count < 1) 355 continue; 356 357 for (j = 0; j < hreport->field[i]->maxusage; j++) { 358 wacom_feature_mapping(hdev, hreport->field[i], 359 hreport->field[i]->usage + j); 360 } 361 } 362 } 363 364 /* now check the input usages */ 365 rep_enum = &hdev->report_enum[HID_INPUT_REPORT]; 366 list_for_each_entry(hreport, &rep_enum->report_list, list) { 367 368 if (!hreport->maxfield) 369 continue; 370 371 for (i = 0; i < hreport->maxfield; i++) 372 for (j = 0; j < hreport->field[i]->maxusage; j++) 373 wacom_usage_mapping(hdev, hreport->field[i], 374 hreport->field[i]->usage + j); 375 } 376 377 wacom_post_parse_hid(hdev, features); 378 } 379 380 static int wacom_hid_set_device_mode(struct hid_device *hdev) 381 { 382 struct wacom *wacom = hid_get_drvdata(hdev); 383 struct hid_data *hid_data = &wacom->wacom_wac.hid_data; 384 struct hid_report *r; 385 struct hid_report_enum *re; 386 387 if (hid_data->inputmode < 0) 388 return 0; 389 390 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 391 r = re->report_id_hash[hid_data->inputmode]; 392 if (r) { 393 r->field[0]->value[hid_data->inputmode_index] = 2; 394 hid_hw_request(hdev, r, HID_REQ_SET_REPORT); 395 } 396 return 0; 397 } 398 399 static int wacom_set_device_mode(struct hid_device *hdev, 400 struct wacom_wac *wacom_wac) 401 { 402 u8 *rep_data; 403 struct hid_report *r; 404 struct hid_report_enum *re; 405 int length; 406 int error = -ENOMEM, limit = 0; 407 408 if (wacom_wac->mode_report < 0) 409 return 0; 410 411 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 412 r = re->report_id_hash[wacom_wac->mode_report]; 413 if (!r) 414 return -EINVAL; 415 416 rep_data = hid_alloc_report_buf(r, GFP_KERNEL); 417 if (!rep_data) 418 return -ENOMEM; 419 420 length = hid_report_len(r); 421 422 do { 423 rep_data[0] = wacom_wac->mode_report; 424 rep_data[1] = wacom_wac->mode_value; 425 426 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 427 length, 1); 428 if (error >= 0) 429 error = wacom_get_report(hdev, HID_FEATURE_REPORT, 430 rep_data, length, 1); 431 } while (error >= 0 && 432 rep_data[1] != wacom_wac->mode_report && 433 limit++ < WAC_MSG_RETRIES); 434 435 kfree(rep_data); 436 437 return error < 0 ? error : 0; 438 } 439 440 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed, 441 struct wacom_features *features) 442 { 443 struct wacom *wacom = hid_get_drvdata(hdev); 444 int ret; 445 u8 rep_data[2]; 446 447 switch (features->type) { 448 case GRAPHIRE_BT: 449 rep_data[0] = 0x03; 450 rep_data[1] = 0x00; 451 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2, 452 3); 453 454 if (ret >= 0) { 455 rep_data[0] = speed == 0 ? 0x05 : 0x06; 456 rep_data[1] = 0x00; 457 458 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, 459 rep_data, 2, 3); 460 461 if (ret >= 0) { 462 wacom->wacom_wac.bt_high_speed = speed; 463 return 0; 464 } 465 } 466 467 /* 468 * Note that if the raw queries fail, it's not a hard failure 469 * and it is safe to continue 470 */ 471 hid_warn(hdev, "failed to poke device, command %d, err %d\n", 472 rep_data[0], ret); 473 break; 474 case INTUOS4WL: 475 if (speed == 1) 476 wacom->wacom_wac.bt_features &= ~0x20; 477 else 478 wacom->wacom_wac.bt_features |= 0x20; 479 480 rep_data[0] = 0x03; 481 rep_data[1] = wacom->wacom_wac.bt_features; 482 483 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2, 484 1); 485 if (ret >= 0) 486 wacom->wacom_wac.bt_high_speed = speed; 487 break; 488 } 489 490 return 0; 491 } 492 493 /* 494 * Switch the tablet into its most-capable mode. Wacom tablets are 495 * typically configured to power-up in a mode which sends mouse-like 496 * reports to the OS. To get absolute position, pressure data, etc. 497 * from the tablet, it is necessary to switch the tablet out of this 498 * mode and into one which sends the full range of tablet data. 499 */ 500 static int wacom_query_tablet_data(struct hid_device *hdev, 501 struct wacom_features *features) 502 { 503 struct wacom *wacom = hid_get_drvdata(hdev); 504 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 505 506 if (hdev->bus == BUS_BLUETOOTH) 507 return wacom_bt_query_tablet_data(hdev, 1, features); 508 509 if (features->type != HID_GENERIC) { 510 if (features->device_type & WACOM_DEVICETYPE_TOUCH) { 511 if (features->type > TABLETPC) { 512 /* MT Tablet PC touch */ 513 wacom_wac->mode_report = 3; 514 wacom_wac->mode_value = 4; 515 } else if (features->type == WACOM_24HDT) { 516 wacom_wac->mode_report = 18; 517 wacom_wac->mode_value = 2; 518 } else if (features->type == WACOM_27QHDT) { 519 wacom_wac->mode_report = 131; 520 wacom_wac->mode_value = 2; 521 } else if (features->type == BAMBOO_PAD) { 522 wacom_wac->mode_report = 2; 523 wacom_wac->mode_value = 2; 524 } 525 } else if (features->device_type & WACOM_DEVICETYPE_PEN) { 526 if (features->type <= BAMBOO_PT) { 527 wacom_wac->mode_report = 2; 528 wacom_wac->mode_value = 2; 529 } 530 } 531 } 532 533 wacom_set_device_mode(hdev, wacom_wac); 534 535 if (features->type == HID_GENERIC) 536 return wacom_hid_set_device_mode(hdev); 537 538 return 0; 539 } 540 541 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev, 542 struct wacom_features *features) 543 { 544 struct wacom *wacom = hid_get_drvdata(hdev); 545 struct usb_interface *intf = wacom->intf; 546 547 /* default features */ 548 features->x_fuzz = 4; 549 features->y_fuzz = 4; 550 features->pressure_fuzz = 0; 551 features->distance_fuzz = 1; 552 features->tilt_fuzz = 1; 553 554 /* 555 * The wireless device HID is basic and layout conflicts with 556 * other tablets (monitor and touch interface can look like pen). 557 * Skip the query for this type and modify defaults based on 558 * interface number. 559 */ 560 if (features->type == WIRELESS) { 561 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) 562 features->device_type = WACOM_DEVICETYPE_WL_MONITOR; 563 else 564 features->device_type = WACOM_DEVICETYPE_NONE; 565 return; 566 } 567 568 wacom_parse_hid(hdev, features); 569 } 570 571 struct wacom_hdev_data { 572 struct list_head list; 573 struct kref kref; 574 struct hid_device *dev; 575 struct wacom_shared shared; 576 }; 577 578 static LIST_HEAD(wacom_udev_list); 579 static DEFINE_MUTEX(wacom_udev_list_lock); 580 581 static bool compare_device_paths(struct hid_device *hdev_a, 582 struct hid_device *hdev_b, char separator) 583 { 584 int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys; 585 int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys; 586 587 if (n1 != n2 || n1 <= 0 || n2 <= 0) 588 return false; 589 590 return !strncmp(hdev_a->phys, hdev_b->phys, n1); 591 } 592 593 static bool wacom_are_sibling(struct hid_device *hdev, 594 struct hid_device *sibling) 595 { 596 struct wacom *wacom = hid_get_drvdata(hdev); 597 struct wacom_features *features = &wacom->wacom_wac.features; 598 struct wacom *sibling_wacom = hid_get_drvdata(sibling); 599 struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features; 600 __u32 oVid = features->oVid ? features->oVid : hdev->vendor; 601 __u32 oPid = features->oPid ? features->oPid : hdev->product; 602 603 /* The defined oVid/oPid must match that of the sibling */ 604 if (features->oVid != HID_ANY_ID && sibling->vendor != oVid) 605 return false; 606 if (features->oPid != HID_ANY_ID && sibling->product != oPid) 607 return false; 608 609 /* 610 * Devices with the same VID/PID must share the same physical 611 * device path, while those with different VID/PID must share 612 * the same physical parent device path. 613 */ 614 if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) { 615 if (!compare_device_paths(hdev, sibling, '/')) 616 return false; 617 } else { 618 if (!compare_device_paths(hdev, sibling, '.')) 619 return false; 620 } 621 622 /* Skip the remaining heuristics unless you are a HID_GENERIC device */ 623 if (features->type != HID_GENERIC) 624 return true; 625 626 /* 627 * Direct-input devices may not be siblings of indirect-input 628 * devices. 629 */ 630 if ((features->device_type & WACOM_DEVICETYPE_DIRECT) && 631 !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT)) 632 return false; 633 634 /* 635 * Indirect-input devices may not be siblings of direct-input 636 * devices. 637 */ 638 if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) && 639 (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT)) 640 return false; 641 642 /* Pen devices may only be siblings of touch devices */ 643 if ((features->device_type & WACOM_DEVICETYPE_PEN) && 644 !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH)) 645 return false; 646 647 /* Touch devices may only be siblings of pen devices */ 648 if ((features->device_type & WACOM_DEVICETYPE_TOUCH) && 649 !(sibling_features->device_type & WACOM_DEVICETYPE_PEN)) 650 return false; 651 652 /* 653 * No reason could be found for these two devices to NOT be 654 * siblings, so there's a good chance they ARE siblings 655 */ 656 return true; 657 } 658 659 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev) 660 { 661 struct wacom_hdev_data *data; 662 663 /* Try to find an already-probed interface from the same device */ 664 list_for_each_entry(data, &wacom_udev_list, list) { 665 if (compare_device_paths(hdev, data->dev, '/')) 666 return data; 667 } 668 669 /* Fallback to finding devices that appear to be "siblings" */ 670 list_for_each_entry(data, &wacom_udev_list, list) { 671 if (wacom_are_sibling(hdev, data->dev)) { 672 kref_get(&data->kref); 673 return data; 674 } 675 } 676 677 return NULL; 678 } 679 680 static void wacom_release_shared_data(struct kref *kref) 681 { 682 struct wacom_hdev_data *data = 683 container_of(kref, struct wacom_hdev_data, kref); 684 685 mutex_lock(&wacom_udev_list_lock); 686 list_del(&data->list); 687 mutex_unlock(&wacom_udev_list_lock); 688 689 kfree(data); 690 } 691 692 static void wacom_remove_shared_data(void *res) 693 { 694 struct wacom *wacom = res; 695 struct wacom_hdev_data *data; 696 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 697 698 if (wacom_wac->shared) { 699 data = container_of(wacom_wac->shared, struct wacom_hdev_data, 700 shared); 701 702 if (wacom_wac->shared->touch == wacom->hdev) 703 wacom_wac->shared->touch = NULL; 704 else if (wacom_wac->shared->pen == wacom->hdev) 705 wacom_wac->shared->pen = NULL; 706 707 kref_put(&data->kref, wacom_release_shared_data); 708 wacom_wac->shared = NULL; 709 } 710 } 711 712 static int wacom_add_shared_data(struct hid_device *hdev) 713 { 714 struct wacom *wacom = hid_get_drvdata(hdev); 715 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 716 struct wacom_hdev_data *data; 717 int retval = 0; 718 719 mutex_lock(&wacom_udev_list_lock); 720 721 data = wacom_get_hdev_data(hdev); 722 if (!data) { 723 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL); 724 if (!data) { 725 retval = -ENOMEM; 726 goto out; 727 } 728 729 kref_init(&data->kref); 730 data->dev = hdev; 731 list_add_tail(&data->list, &wacom_udev_list); 732 } 733 734 wacom_wac->shared = &data->shared; 735 736 retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom); 737 if (retval) { 738 mutex_unlock(&wacom_udev_list_lock); 739 wacom_remove_shared_data(wacom); 740 return retval; 741 } 742 743 out: 744 mutex_unlock(&wacom_udev_list_lock); 745 return retval; 746 } 747 748 static int wacom_led_control(struct wacom *wacom) 749 { 750 unsigned char *buf; 751 int retval; 752 unsigned char report_id = WAC_CMD_LED_CONTROL; 753 int buf_size = 9; 754 755 if (!hid_get_drvdata(wacom->hdev)) 756 return -ENODEV; 757 758 if (!wacom->led.groups) 759 return -ENOTSUPP; 760 761 if (wacom->wacom_wac.pid) { /* wireless connected */ 762 report_id = WAC_CMD_WL_LED_CONTROL; 763 buf_size = 13; 764 } 765 buf = kzalloc(buf_size, GFP_KERNEL); 766 if (!buf) 767 return -ENOMEM; 768 769 if (wacom->wacom_wac.features.type >= INTUOS5S && 770 wacom->wacom_wac.features.type <= INTUOSPL) { 771 /* 772 * Touch Ring and crop mark LED luminance may take on 773 * one of four values: 774 * 0 = Low; 1 = Medium; 2 = High; 3 = Off 775 */ 776 int ring_led = wacom->led.groups[0].select & 0x03; 777 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03; 778 int crop_lum = 0; 779 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led); 780 781 buf[0] = report_id; 782 if (wacom->wacom_wac.pid) { 783 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT, 784 buf, buf_size, WAC_CMD_RETRIES); 785 buf[0] = report_id; 786 buf[4] = led_bits; 787 } else 788 buf[1] = led_bits; 789 } 790 else { 791 int led = wacom->led.groups[0].select | 0x4; 792 793 if (wacom->wacom_wac.features.type == WACOM_21UX2 || 794 wacom->wacom_wac.features.type == WACOM_24HD) 795 led |= (wacom->led.groups[1].select << 4) | 0x40; 796 797 buf[0] = report_id; 798 buf[1] = led; 799 buf[2] = wacom->led.llv; 800 buf[3] = wacom->led.hlv; 801 buf[4] = wacom->led.img_lum; 802 } 803 804 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size, 805 WAC_CMD_RETRIES); 806 kfree(buf); 807 808 return retval; 809 } 810 811 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id, 812 const unsigned len, const void *img) 813 { 814 unsigned char *buf; 815 int i, retval; 816 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */ 817 818 buf = kzalloc(chunk_len + 3 , GFP_KERNEL); 819 if (!buf) 820 return -ENOMEM; 821 822 /* Send 'start' command */ 823 buf[0] = WAC_CMD_ICON_START; 824 buf[1] = 1; 825 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2, 826 WAC_CMD_RETRIES); 827 if (retval < 0) 828 goto out; 829 830 buf[0] = xfer_id; 831 buf[1] = button_id & 0x07; 832 for (i = 0; i < 4; i++) { 833 buf[2] = i; 834 memcpy(buf + 3, img + i * chunk_len, chunk_len); 835 836 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, 837 buf, chunk_len + 3, WAC_CMD_RETRIES); 838 if (retval < 0) 839 break; 840 } 841 842 /* Send 'stop' */ 843 buf[0] = WAC_CMD_ICON_START; 844 buf[1] = 0; 845 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2, 846 WAC_CMD_RETRIES); 847 848 out: 849 kfree(buf); 850 return retval; 851 } 852 853 static ssize_t wacom_led_select_store(struct device *dev, int set_id, 854 const char *buf, size_t count) 855 { 856 struct hid_device *hdev = to_hid_device(dev); 857 struct wacom *wacom = hid_get_drvdata(hdev); 858 unsigned int id; 859 int err; 860 861 err = kstrtouint(buf, 10, &id); 862 if (err) 863 return err; 864 865 mutex_lock(&wacom->lock); 866 867 wacom->led.groups[set_id].select = id & 0x3; 868 err = wacom_led_control(wacom); 869 870 mutex_unlock(&wacom->lock); 871 872 return err < 0 ? err : count; 873 } 874 875 #define DEVICE_LED_SELECT_ATTR(SET_ID) \ 876 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \ 877 struct device_attribute *attr, const char *buf, size_t count) \ 878 { \ 879 return wacom_led_select_store(dev, SET_ID, buf, count); \ 880 } \ 881 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \ 882 struct device_attribute *attr, char *buf) \ 883 { \ 884 struct hid_device *hdev = to_hid_device(dev);\ 885 struct wacom *wacom = hid_get_drvdata(hdev); \ 886 return scnprintf(buf, PAGE_SIZE, "%d\n", \ 887 wacom->led.groups[SET_ID].select); \ 888 } \ 889 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \ 890 wacom_led##SET_ID##_select_show, \ 891 wacom_led##SET_ID##_select_store) 892 893 DEVICE_LED_SELECT_ATTR(0); 894 DEVICE_LED_SELECT_ATTR(1); 895 896 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest, 897 const char *buf, size_t count) 898 { 899 unsigned int value; 900 int err; 901 902 err = kstrtouint(buf, 10, &value); 903 if (err) 904 return err; 905 906 mutex_lock(&wacom->lock); 907 908 *dest = value & 0x7f; 909 err = wacom_led_control(wacom); 910 911 mutex_unlock(&wacom->lock); 912 913 return err < 0 ? err : count; 914 } 915 916 #define DEVICE_LUMINANCE_ATTR(name, field) \ 917 static ssize_t wacom_##name##_luminance_store(struct device *dev, \ 918 struct device_attribute *attr, const char *buf, size_t count) \ 919 { \ 920 struct hid_device *hdev = to_hid_device(dev);\ 921 struct wacom *wacom = hid_get_drvdata(hdev); \ 922 \ 923 return wacom_luminance_store(wacom, &wacom->led.field, \ 924 buf, count); \ 925 } \ 926 static ssize_t wacom_##name##_luminance_show(struct device *dev, \ 927 struct device_attribute *attr, char *buf) \ 928 { \ 929 struct wacom *wacom = dev_get_drvdata(dev); \ 930 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \ 931 } \ 932 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \ 933 wacom_##name##_luminance_show, \ 934 wacom_##name##_luminance_store) 935 936 DEVICE_LUMINANCE_ATTR(status0, llv); 937 DEVICE_LUMINANCE_ATTR(status1, hlv); 938 DEVICE_LUMINANCE_ATTR(buttons, img_lum); 939 940 static ssize_t wacom_button_image_store(struct device *dev, int button_id, 941 const char *buf, size_t count) 942 { 943 struct hid_device *hdev = to_hid_device(dev); 944 struct wacom *wacom = hid_get_drvdata(hdev); 945 int err; 946 unsigned len; 947 u8 xfer_id; 948 949 if (hdev->bus == BUS_BLUETOOTH) { 950 len = 256; 951 xfer_id = WAC_CMD_ICON_BT_XFER; 952 } else { 953 len = 1024; 954 xfer_id = WAC_CMD_ICON_XFER; 955 } 956 957 if (count != len) 958 return -EINVAL; 959 960 mutex_lock(&wacom->lock); 961 962 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf); 963 964 mutex_unlock(&wacom->lock); 965 966 return err < 0 ? err : count; 967 } 968 969 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \ 970 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \ 971 struct device_attribute *attr, const char *buf, size_t count) \ 972 { \ 973 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \ 974 } \ 975 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \ 976 NULL, wacom_btnimg##BUTTON_ID##_store) 977 978 DEVICE_BTNIMG_ATTR(0); 979 DEVICE_BTNIMG_ATTR(1); 980 DEVICE_BTNIMG_ATTR(2); 981 DEVICE_BTNIMG_ATTR(3); 982 DEVICE_BTNIMG_ATTR(4); 983 DEVICE_BTNIMG_ATTR(5); 984 DEVICE_BTNIMG_ATTR(6); 985 DEVICE_BTNIMG_ATTR(7); 986 987 static struct attribute *cintiq_led_attrs[] = { 988 &dev_attr_status_led0_select.attr, 989 &dev_attr_status_led1_select.attr, 990 NULL 991 }; 992 993 static struct attribute_group cintiq_led_attr_group = { 994 .name = "wacom_led", 995 .attrs = cintiq_led_attrs, 996 }; 997 998 static struct attribute *intuos4_led_attrs[] = { 999 &dev_attr_status0_luminance.attr, 1000 &dev_attr_status1_luminance.attr, 1001 &dev_attr_status_led0_select.attr, 1002 &dev_attr_buttons_luminance.attr, 1003 &dev_attr_button0_rawimg.attr, 1004 &dev_attr_button1_rawimg.attr, 1005 &dev_attr_button2_rawimg.attr, 1006 &dev_attr_button3_rawimg.attr, 1007 &dev_attr_button4_rawimg.attr, 1008 &dev_attr_button5_rawimg.attr, 1009 &dev_attr_button6_rawimg.attr, 1010 &dev_attr_button7_rawimg.attr, 1011 NULL 1012 }; 1013 1014 static struct attribute_group intuos4_led_attr_group = { 1015 .name = "wacom_led", 1016 .attrs = intuos4_led_attrs, 1017 }; 1018 1019 static struct attribute *intuos5_led_attrs[] = { 1020 &dev_attr_status0_luminance.attr, 1021 &dev_attr_status_led0_select.attr, 1022 NULL 1023 }; 1024 1025 static struct attribute_group intuos5_led_attr_group = { 1026 .name = "wacom_led", 1027 .attrs = intuos5_led_attrs, 1028 }; 1029 1030 struct wacom_sysfs_group_devres { 1031 struct attribute_group *group; 1032 struct kobject *root; 1033 }; 1034 1035 static void wacom_devm_sysfs_group_release(struct device *dev, void *res) 1036 { 1037 struct wacom_sysfs_group_devres *devres = res; 1038 struct kobject *kobj = devres->root; 1039 1040 dev_dbg(dev, "%s: dropping reference to %s\n", 1041 __func__, devres->group->name); 1042 sysfs_remove_group(kobj, devres->group); 1043 } 1044 1045 static int __wacom_devm_sysfs_create_group(struct wacom *wacom, 1046 struct kobject *root, 1047 struct attribute_group *group) 1048 { 1049 struct wacom_sysfs_group_devres *devres; 1050 int error; 1051 1052 devres = devres_alloc(wacom_devm_sysfs_group_release, 1053 sizeof(struct wacom_sysfs_group_devres), 1054 GFP_KERNEL); 1055 if (!devres) 1056 return -ENOMEM; 1057 1058 devres->group = group; 1059 devres->root = root; 1060 1061 error = sysfs_create_group(devres->root, group); 1062 if (error) 1063 return error; 1064 1065 devres_add(&wacom->hdev->dev, devres); 1066 1067 return 0; 1068 } 1069 1070 static int wacom_devm_sysfs_create_group(struct wacom *wacom, 1071 struct attribute_group *group) 1072 { 1073 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj, 1074 group); 1075 } 1076 1077 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led) 1078 { 1079 struct wacom *wacom = led->wacom; 1080 1081 if (wacom->led.max_hlv) 1082 return led->hlv * LED_FULL / wacom->led.max_hlv; 1083 1084 if (wacom->led.max_llv) 1085 return led->llv * LED_FULL / wacom->led.max_llv; 1086 1087 /* device doesn't support brightness tuning */ 1088 return LED_FULL; 1089 } 1090 1091 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev) 1092 { 1093 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev); 1094 struct wacom *wacom = led->wacom; 1095 1096 if (wacom->led.groups[led->group].select != led->id) 1097 return LED_OFF; 1098 1099 return wacom_leds_brightness_get(led); 1100 } 1101 1102 static int wacom_led_brightness_set(struct led_classdev *cdev, 1103 enum led_brightness brightness) 1104 { 1105 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev); 1106 struct wacom *wacom = led->wacom; 1107 int error; 1108 1109 mutex_lock(&wacom->lock); 1110 1111 if (!wacom->led.groups || (brightness == LED_OFF && 1112 wacom->led.groups[led->group].select != led->id)) { 1113 error = 0; 1114 goto out; 1115 } 1116 1117 led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL; 1118 led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL; 1119 1120 wacom->led.groups[led->group].select = led->id; 1121 1122 error = wacom_led_control(wacom); 1123 1124 out: 1125 mutex_unlock(&wacom->lock); 1126 1127 return error; 1128 } 1129 1130 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev, 1131 enum led_brightness brightness) 1132 { 1133 } 1134 1135 static int wacom_led_register_one(struct device *dev, struct wacom *wacom, 1136 struct wacom_led *led, unsigned int group, 1137 unsigned int id, bool read_only) 1138 { 1139 int error; 1140 char *name; 1141 1142 name = devm_kasprintf(dev, GFP_KERNEL, 1143 "%s::wacom-%d.%d", 1144 dev_name(dev), 1145 group, 1146 id); 1147 if (!name) 1148 return -ENOMEM; 1149 1150 if (!read_only) { 1151 led->trigger.name = name; 1152 error = devm_led_trigger_register(dev, &led->trigger); 1153 if (error) { 1154 hid_err(wacom->hdev, 1155 "failed to register LED trigger %s: %d\n", 1156 led->cdev.name, error); 1157 return error; 1158 } 1159 } 1160 1161 led->group = group; 1162 led->id = id; 1163 led->wacom = wacom; 1164 led->llv = wacom->led.llv; 1165 led->hlv = wacom->led.hlv; 1166 led->cdev.name = name; 1167 led->cdev.max_brightness = LED_FULL; 1168 led->cdev.flags = LED_HW_PLUGGABLE; 1169 led->cdev.brightness_get = __wacom_led_brightness_get; 1170 if (!read_only) { 1171 led->cdev.brightness_set_blocking = wacom_led_brightness_set; 1172 led->cdev.default_trigger = led->cdev.name; 1173 } else { 1174 led->cdev.brightness_set = wacom_led_readonly_brightness_set; 1175 } 1176 1177 error = devm_led_classdev_register(dev, &led->cdev); 1178 if (error) { 1179 hid_err(wacom->hdev, 1180 "failed to register LED %s: %d\n", 1181 led->cdev.name, error); 1182 led->cdev.name = NULL; 1183 return error; 1184 } 1185 1186 return 0; 1187 } 1188 1189 static void wacom_led_groups_release_one(void *data) 1190 { 1191 struct wacom_group_leds *group = data; 1192 1193 devres_release_group(group->dev, group); 1194 } 1195 1196 static int wacom_led_groups_alloc_and_register_one(struct device *dev, 1197 struct wacom *wacom, 1198 int group_id, int count, 1199 bool read_only) 1200 { 1201 struct wacom_led *leds; 1202 int i, error; 1203 1204 if (group_id >= wacom->led.count || count <= 0) 1205 return -EINVAL; 1206 1207 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL)) 1208 return -ENOMEM; 1209 1210 leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL); 1211 if (!leds) { 1212 error = -ENOMEM; 1213 goto err; 1214 } 1215 1216 wacom->led.groups[group_id].leds = leds; 1217 wacom->led.groups[group_id].count = count; 1218 1219 for (i = 0; i < count; i++) { 1220 error = wacom_led_register_one(dev, wacom, &leds[i], 1221 group_id, i, read_only); 1222 if (error) 1223 goto err; 1224 } 1225 1226 wacom->led.groups[group_id].dev = dev; 1227 1228 devres_close_group(dev, &wacom->led.groups[group_id]); 1229 1230 /* 1231 * There is a bug (?) in devm_led_classdev_register() in which its 1232 * increments the refcount of the parent. If the parent is an input 1233 * device, that means the ref count never reaches 0 when 1234 * devm_input_device_release() gets called. 1235 * This means that the LEDs are still there after disconnect. 1236 * Manually force the release of the group so that the leds are released 1237 * once we are done using them. 1238 */ 1239 error = devm_add_action_or_reset(&wacom->hdev->dev, 1240 wacom_led_groups_release_one, 1241 &wacom->led.groups[group_id]); 1242 if (error) 1243 return error; 1244 1245 return 0; 1246 1247 err: 1248 devres_release_group(dev, &wacom->led.groups[group_id]); 1249 return error; 1250 } 1251 1252 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id, 1253 unsigned int id) 1254 { 1255 struct wacom_group_leds *group; 1256 1257 if (group_id >= wacom->led.count) 1258 return NULL; 1259 1260 group = &wacom->led.groups[group_id]; 1261 1262 if (!group->leds) 1263 return NULL; 1264 1265 id %= group->count; 1266 1267 return &group->leds[id]; 1268 } 1269 1270 /** 1271 * wacom_led_next: gives the next available led with a wacom trigger. 1272 * 1273 * returns the next available struct wacom_led which has its default trigger 1274 * or the current one if none is available. 1275 */ 1276 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur) 1277 { 1278 struct wacom_led *next_led; 1279 int group, next; 1280 1281 if (!wacom || !cur) 1282 return NULL; 1283 1284 group = cur->group; 1285 next = cur->id; 1286 1287 do { 1288 next_led = wacom_led_find(wacom, group, ++next); 1289 if (!next_led || next_led == cur) 1290 return next_led; 1291 } while (next_led->cdev.trigger != &next_led->trigger); 1292 1293 return next_led; 1294 } 1295 1296 static void wacom_led_groups_release(void *data) 1297 { 1298 struct wacom *wacom = data; 1299 1300 wacom->led.groups = NULL; 1301 wacom->led.count = 0; 1302 } 1303 1304 static int wacom_led_groups_allocate(struct wacom *wacom, int count) 1305 { 1306 struct device *dev = &wacom->hdev->dev; 1307 struct wacom_group_leds *groups; 1308 int error; 1309 1310 groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count, 1311 GFP_KERNEL); 1312 if (!groups) 1313 return -ENOMEM; 1314 1315 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom); 1316 if (error) 1317 return error; 1318 1319 wacom->led.groups = groups; 1320 wacom->led.count = count; 1321 1322 return 0; 1323 } 1324 1325 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count, 1326 int led_per_group, bool read_only) 1327 { 1328 struct device *dev; 1329 int i, error; 1330 1331 if (!wacom->wacom_wac.pad_input) 1332 return -EINVAL; 1333 1334 dev = &wacom->wacom_wac.pad_input->dev; 1335 1336 error = wacom_led_groups_allocate(wacom, group_count); 1337 if (error) 1338 return error; 1339 1340 for (i = 0; i < group_count; i++) { 1341 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i, 1342 led_per_group, 1343 read_only); 1344 if (error) 1345 return error; 1346 } 1347 1348 return 0; 1349 } 1350 1351 static int wacom_initialize_leds(struct wacom *wacom) 1352 { 1353 int error; 1354 1355 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD)) 1356 return 0; 1357 1358 /* Initialize default values */ 1359 switch (wacom->wacom_wac.features.type) { 1360 case INTUOS4S: 1361 case INTUOS4: 1362 case INTUOS4WL: 1363 case INTUOS4L: 1364 wacom->led.llv = 10; 1365 wacom->led.hlv = 20; 1366 wacom->led.max_llv = 127; 1367 wacom->led.max_hlv = 127; 1368 wacom->led.img_lum = 10; 1369 1370 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1371 if (error) { 1372 hid_err(wacom->hdev, 1373 "cannot create leds err: %d\n", error); 1374 return error; 1375 } 1376 1377 error = wacom_devm_sysfs_create_group(wacom, 1378 &intuos4_led_attr_group); 1379 break; 1380 1381 case WACOM_24HD: 1382 case WACOM_21UX2: 1383 wacom->led.llv = 0; 1384 wacom->led.hlv = 0; 1385 wacom->led.img_lum = 0; 1386 1387 error = wacom_leds_alloc_and_register(wacom, 2, 4, false); 1388 if (error) { 1389 hid_err(wacom->hdev, 1390 "cannot create leds err: %d\n", error); 1391 return error; 1392 } 1393 1394 error = wacom_devm_sysfs_create_group(wacom, 1395 &cintiq_led_attr_group); 1396 break; 1397 1398 case INTUOS5S: 1399 case INTUOS5: 1400 case INTUOS5L: 1401 case INTUOSPS: 1402 case INTUOSPM: 1403 case INTUOSPL: 1404 wacom->led.llv = 32; 1405 wacom->led.max_llv = 96; 1406 1407 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1408 if (error) { 1409 hid_err(wacom->hdev, 1410 "cannot create leds err: %d\n", error); 1411 return error; 1412 } 1413 1414 error = wacom_devm_sysfs_create_group(wacom, 1415 &intuos5_led_attr_group); 1416 break; 1417 1418 case REMOTE: 1419 wacom->led.llv = 255; 1420 wacom->led.max_llv = 255; 1421 error = wacom_led_groups_allocate(wacom, 5); 1422 if (error) { 1423 hid_err(wacom->hdev, 1424 "cannot create leds err: %d\n", error); 1425 return error; 1426 } 1427 return 0; 1428 1429 default: 1430 return 0; 1431 } 1432 1433 if (error) { 1434 hid_err(wacom->hdev, 1435 "cannot create sysfs group err: %d\n", error); 1436 return error; 1437 } 1438 wacom_led_control(wacom); 1439 1440 return 0; 1441 } 1442 1443 static enum power_supply_property wacom_battery_props[] = { 1444 POWER_SUPPLY_PROP_MODEL_NAME, 1445 POWER_SUPPLY_PROP_PRESENT, 1446 POWER_SUPPLY_PROP_STATUS, 1447 POWER_SUPPLY_PROP_SCOPE, 1448 POWER_SUPPLY_PROP_CAPACITY 1449 }; 1450 1451 static int wacom_battery_get_property(struct power_supply *psy, 1452 enum power_supply_property psp, 1453 union power_supply_propval *val) 1454 { 1455 struct wacom_battery *battery = power_supply_get_drvdata(psy); 1456 int ret = 0; 1457 1458 switch (psp) { 1459 case POWER_SUPPLY_PROP_MODEL_NAME: 1460 val->strval = battery->wacom->wacom_wac.name; 1461 break; 1462 case POWER_SUPPLY_PROP_PRESENT: 1463 val->intval = battery->bat_connected; 1464 break; 1465 case POWER_SUPPLY_PROP_SCOPE: 1466 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 1467 break; 1468 case POWER_SUPPLY_PROP_CAPACITY: 1469 val->intval = battery->battery_capacity; 1470 break; 1471 case POWER_SUPPLY_PROP_STATUS: 1472 if (battery->bat_charging) 1473 val->intval = POWER_SUPPLY_STATUS_CHARGING; 1474 else if (battery->battery_capacity == 100 && 1475 battery->ps_connected) 1476 val->intval = POWER_SUPPLY_STATUS_FULL; 1477 else if (battery->ps_connected) 1478 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; 1479 else 1480 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 1481 break; 1482 default: 1483 ret = -EINVAL; 1484 break; 1485 } 1486 1487 return ret; 1488 } 1489 1490 static int __wacom_initialize_battery(struct wacom *wacom, 1491 struct wacom_battery *battery) 1492 { 1493 static atomic_t battery_no = ATOMIC_INIT(0); 1494 struct device *dev = &wacom->hdev->dev; 1495 struct power_supply_config psy_cfg = { .drv_data = battery, }; 1496 struct power_supply *ps_bat; 1497 struct power_supply_desc *bat_desc = &battery->bat_desc; 1498 unsigned long n; 1499 int error; 1500 1501 if (!devres_open_group(dev, bat_desc, GFP_KERNEL)) 1502 return -ENOMEM; 1503 1504 battery->wacom = wacom; 1505 1506 n = atomic_inc_return(&battery_no) - 1; 1507 1508 bat_desc->properties = wacom_battery_props; 1509 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props); 1510 bat_desc->get_property = wacom_battery_get_property; 1511 sprintf(battery->bat_name, "wacom_battery_%ld", n); 1512 bat_desc->name = battery->bat_name; 1513 bat_desc->type = POWER_SUPPLY_TYPE_USB; 1514 bat_desc->use_for_apm = 0; 1515 1516 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg); 1517 if (IS_ERR(ps_bat)) { 1518 error = PTR_ERR(ps_bat); 1519 goto err; 1520 } 1521 1522 power_supply_powers(ps_bat, &wacom->hdev->dev); 1523 1524 battery->battery = ps_bat; 1525 1526 devres_close_group(dev, bat_desc); 1527 return 0; 1528 1529 err: 1530 devres_release_group(dev, bat_desc); 1531 return error; 1532 } 1533 1534 static int wacom_initialize_battery(struct wacom *wacom) 1535 { 1536 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) 1537 return __wacom_initialize_battery(wacom, &wacom->battery); 1538 1539 return 0; 1540 } 1541 1542 static void wacom_destroy_battery(struct wacom *wacom) 1543 { 1544 if (wacom->battery.battery) { 1545 devres_release_group(&wacom->hdev->dev, 1546 &wacom->battery.bat_desc); 1547 wacom->battery.battery = NULL; 1548 } 1549 } 1550 1551 static ssize_t wacom_show_speed(struct device *dev, 1552 struct device_attribute 1553 *attr, char *buf) 1554 { 1555 struct hid_device *hdev = to_hid_device(dev); 1556 struct wacom *wacom = hid_get_drvdata(hdev); 1557 1558 return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed); 1559 } 1560 1561 static ssize_t wacom_store_speed(struct device *dev, 1562 struct device_attribute *attr, 1563 const char *buf, size_t count) 1564 { 1565 struct hid_device *hdev = to_hid_device(dev); 1566 struct wacom *wacom = hid_get_drvdata(hdev); 1567 u8 new_speed; 1568 1569 if (kstrtou8(buf, 0, &new_speed)) 1570 return -EINVAL; 1571 1572 if (new_speed != 0 && new_speed != 1) 1573 return -EINVAL; 1574 1575 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features); 1576 1577 return count; 1578 } 1579 1580 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM, 1581 wacom_show_speed, wacom_store_speed); 1582 1583 1584 static ssize_t wacom_show_remote_mode(struct kobject *kobj, 1585 struct kobj_attribute *kattr, 1586 char *buf, int index) 1587 { 1588 struct device *dev = kobj_to_dev(kobj->parent); 1589 struct hid_device *hdev = to_hid_device(dev); 1590 struct wacom *wacom = hid_get_drvdata(hdev); 1591 u8 mode; 1592 1593 mode = wacom->led.groups[index].select; 1594 if (mode >= 0 && mode < 3) 1595 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 1596 else 1597 return snprintf(buf, PAGE_SIZE, "%d\n", -1); 1598 } 1599 1600 #define DEVICE_EKR_ATTR_GROUP(SET_ID) \ 1601 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \ 1602 struct kobj_attribute *kattr, char *buf) \ 1603 { \ 1604 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \ 1605 } \ 1606 static struct kobj_attribute remote##SET_ID##_mode_attr = { \ 1607 .attr = {.name = "remote_mode", \ 1608 .mode = DEV_ATTR_RO_PERM}, \ 1609 .show = wacom_show_remote##SET_ID##_mode, \ 1610 }; \ 1611 static struct attribute *remote##SET_ID##_serial_attrs[] = { \ 1612 &remote##SET_ID##_mode_attr.attr, \ 1613 NULL \ 1614 }; \ 1615 static struct attribute_group remote##SET_ID##_serial_group = { \ 1616 .name = NULL, \ 1617 .attrs = remote##SET_ID##_serial_attrs, \ 1618 } 1619 1620 DEVICE_EKR_ATTR_GROUP(0); 1621 DEVICE_EKR_ATTR_GROUP(1); 1622 DEVICE_EKR_ATTR_GROUP(2); 1623 DEVICE_EKR_ATTR_GROUP(3); 1624 DEVICE_EKR_ATTR_GROUP(4); 1625 1626 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial, 1627 int index) 1628 { 1629 int error = 0; 1630 struct wacom_remote *remote = wacom->remote; 1631 1632 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev, 1633 GFP_KERNEL, 1634 "%d", serial); 1635 if (!remote->remotes[index].group.name) 1636 return -ENOMEM; 1637 1638 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir, 1639 &remote->remotes[index].group); 1640 if (error) { 1641 remote->remotes[index].group.name = NULL; 1642 hid_err(wacom->hdev, 1643 "cannot create sysfs group err: %d\n", error); 1644 return error; 1645 } 1646 1647 return 0; 1648 } 1649 1650 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector) 1651 { 1652 const size_t buf_size = 2; 1653 unsigned char *buf; 1654 int retval; 1655 1656 buf = kzalloc(buf_size, GFP_KERNEL); 1657 if (!buf) 1658 return -ENOMEM; 1659 1660 buf[0] = WAC_CMD_DELETE_PAIRING; 1661 buf[1] = selector; 1662 1663 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf, 1664 buf_size, WAC_CMD_RETRIES); 1665 kfree(buf); 1666 1667 return retval; 1668 } 1669 1670 static ssize_t wacom_store_unpair_remote(struct kobject *kobj, 1671 struct kobj_attribute *attr, 1672 const char *buf, size_t count) 1673 { 1674 unsigned char selector = 0; 1675 struct device *dev = kobj_to_dev(kobj->parent); 1676 struct hid_device *hdev = to_hid_device(dev); 1677 struct wacom *wacom = hid_get_drvdata(hdev); 1678 int err; 1679 1680 if (!strncmp(buf, "*\n", 2)) { 1681 selector = WAC_CMD_UNPAIR_ALL; 1682 } else { 1683 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n", 1684 buf); 1685 return -1; 1686 } 1687 1688 mutex_lock(&wacom->lock); 1689 1690 err = wacom_cmd_unpair_remote(wacom, selector); 1691 mutex_unlock(&wacom->lock); 1692 1693 return err < 0 ? err : count; 1694 } 1695 1696 static struct kobj_attribute unpair_remote_attr = { 1697 .attr = {.name = "unpair_remote", .mode = 0200}, 1698 .store = wacom_store_unpair_remote, 1699 }; 1700 1701 static const struct attribute *remote_unpair_attrs[] = { 1702 &unpair_remote_attr.attr, 1703 NULL 1704 }; 1705 1706 static void wacom_remotes_destroy(void *data) 1707 { 1708 struct wacom *wacom = data; 1709 struct wacom_remote *remote = wacom->remote; 1710 1711 if (!remote) 1712 return; 1713 1714 kobject_put(remote->remote_dir); 1715 kfifo_free(&remote->remote_fifo); 1716 wacom->remote = NULL; 1717 } 1718 1719 static int wacom_initialize_remotes(struct wacom *wacom) 1720 { 1721 int error = 0; 1722 struct wacom_remote *remote; 1723 int i; 1724 1725 if (wacom->wacom_wac.features.type != REMOTE) 1726 return 0; 1727 1728 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote), 1729 GFP_KERNEL); 1730 if (!remote) 1731 return -ENOMEM; 1732 1733 wacom->remote = remote; 1734 1735 spin_lock_init(&remote->remote_lock); 1736 1737 error = kfifo_alloc(&remote->remote_fifo, 1738 5 * sizeof(struct wacom_remote_data), 1739 GFP_KERNEL); 1740 if (error) { 1741 hid_err(wacom->hdev, "failed allocating remote_fifo\n"); 1742 return -ENOMEM; 1743 } 1744 1745 remote->remotes[0].group = remote0_serial_group; 1746 remote->remotes[1].group = remote1_serial_group; 1747 remote->remotes[2].group = remote2_serial_group; 1748 remote->remotes[3].group = remote3_serial_group; 1749 remote->remotes[4].group = remote4_serial_group; 1750 1751 remote->remote_dir = kobject_create_and_add("wacom_remote", 1752 &wacom->hdev->dev.kobj); 1753 if (!remote->remote_dir) 1754 return -ENOMEM; 1755 1756 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs); 1757 1758 if (error) { 1759 hid_err(wacom->hdev, 1760 "cannot create sysfs group err: %d\n", error); 1761 return error; 1762 } 1763 1764 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 1765 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN; 1766 remote->remotes[i].serial = 0; 1767 } 1768 1769 error = devm_add_action_or_reset(&wacom->hdev->dev, 1770 wacom_remotes_destroy, wacom); 1771 if (error) 1772 return error; 1773 1774 return 0; 1775 } 1776 1777 static struct input_dev *wacom_allocate_input(struct wacom *wacom) 1778 { 1779 struct input_dev *input_dev; 1780 struct hid_device *hdev = wacom->hdev; 1781 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 1782 1783 input_dev = devm_input_allocate_device(&hdev->dev); 1784 if (!input_dev) 1785 return NULL; 1786 1787 input_dev->name = wacom_wac->features.name; 1788 input_dev->phys = hdev->phys; 1789 input_dev->dev.parent = &hdev->dev; 1790 input_dev->open = wacom_open; 1791 input_dev->close = wacom_close; 1792 input_dev->uniq = hdev->uniq; 1793 input_dev->id.bustype = hdev->bus; 1794 input_dev->id.vendor = hdev->vendor; 1795 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product; 1796 input_dev->id.version = hdev->version; 1797 input_set_drvdata(input_dev, wacom); 1798 1799 return input_dev; 1800 } 1801 1802 static int wacom_allocate_inputs(struct wacom *wacom) 1803 { 1804 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 1805 1806 wacom_wac->pen_input = wacom_allocate_input(wacom); 1807 wacom_wac->touch_input = wacom_allocate_input(wacom); 1808 wacom_wac->pad_input = wacom_allocate_input(wacom); 1809 if (!wacom_wac->pen_input || 1810 !wacom_wac->touch_input || 1811 !wacom_wac->pad_input) 1812 return -ENOMEM; 1813 1814 wacom_wac->pen_input->name = wacom_wac->pen_name; 1815 wacom_wac->touch_input->name = wacom_wac->touch_name; 1816 wacom_wac->pad_input->name = wacom_wac->pad_name; 1817 1818 return 0; 1819 } 1820 1821 static int wacom_register_inputs(struct wacom *wacom) 1822 { 1823 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev; 1824 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 1825 int error = 0; 1826 1827 pen_input_dev = wacom_wac->pen_input; 1828 touch_input_dev = wacom_wac->touch_input; 1829 pad_input_dev = wacom_wac->pad_input; 1830 1831 if (!pen_input_dev || !touch_input_dev || !pad_input_dev) 1832 return -EINVAL; 1833 1834 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac); 1835 if (error) { 1836 /* no pen in use on this interface */ 1837 input_free_device(pen_input_dev); 1838 wacom_wac->pen_input = NULL; 1839 pen_input_dev = NULL; 1840 } else { 1841 error = input_register_device(pen_input_dev); 1842 if (error) 1843 goto fail; 1844 } 1845 1846 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac); 1847 if (error) { 1848 /* no touch in use on this interface */ 1849 input_free_device(touch_input_dev); 1850 wacom_wac->touch_input = NULL; 1851 touch_input_dev = NULL; 1852 } else { 1853 error = input_register_device(touch_input_dev); 1854 if (error) 1855 goto fail; 1856 } 1857 1858 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac); 1859 if (error) { 1860 /* no pad in use on this interface */ 1861 input_free_device(pad_input_dev); 1862 wacom_wac->pad_input = NULL; 1863 pad_input_dev = NULL; 1864 } else { 1865 error = input_register_device(pad_input_dev); 1866 if (error) 1867 goto fail; 1868 } 1869 1870 return 0; 1871 1872 fail: 1873 wacom_wac->pad_input = NULL; 1874 wacom_wac->touch_input = NULL; 1875 wacom_wac->pen_input = NULL; 1876 return error; 1877 } 1878 1879 /* 1880 * Not all devices report physical dimensions from HID. 1881 * Compute the default from hardcoded logical dimension 1882 * and resolution before driver overwrites them. 1883 */ 1884 static void wacom_set_default_phy(struct wacom_features *features) 1885 { 1886 if (features->x_resolution) { 1887 features->x_phy = (features->x_max * 100) / 1888 features->x_resolution; 1889 features->y_phy = (features->y_max * 100) / 1890 features->y_resolution; 1891 } 1892 } 1893 1894 static void wacom_calculate_res(struct wacom_features *features) 1895 { 1896 /* set unit to "100th of a mm" for devices not reported by HID */ 1897 if (!features->unit) { 1898 features->unit = 0x11; 1899 features->unitExpo = -3; 1900 } 1901 1902 features->x_resolution = wacom_calc_hid_res(features->x_max, 1903 features->x_phy, 1904 features->unit, 1905 features->unitExpo); 1906 features->y_resolution = wacom_calc_hid_res(features->y_max, 1907 features->y_phy, 1908 features->unit, 1909 features->unitExpo); 1910 } 1911 1912 void wacom_battery_work(struct work_struct *work) 1913 { 1914 struct wacom *wacom = container_of(work, struct wacom, battery_work); 1915 1916 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && 1917 !wacom->battery.battery) { 1918 wacom_initialize_battery(wacom); 1919 } 1920 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && 1921 wacom->battery.battery) { 1922 wacom_destroy_battery(wacom); 1923 } 1924 } 1925 1926 static size_t wacom_compute_pktlen(struct hid_device *hdev) 1927 { 1928 struct hid_report_enum *report_enum; 1929 struct hid_report *report; 1930 size_t size = 0; 1931 1932 report_enum = hdev->report_enum + HID_INPUT_REPORT; 1933 1934 list_for_each_entry(report, &report_enum->report_list, list) { 1935 size_t report_size = hid_report_len(report); 1936 if (report_size > size) 1937 size = report_size; 1938 } 1939 1940 return size; 1941 } 1942 1943 static void wacom_update_name(struct wacom *wacom, const char *suffix) 1944 { 1945 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 1946 struct wacom_features *features = &wacom_wac->features; 1947 char name[WACOM_NAME_MAX]; 1948 1949 /* Generic devices name unspecified */ 1950 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) { 1951 if (strstr(wacom->hdev->name, "Wacom") || 1952 strstr(wacom->hdev->name, "wacom") || 1953 strstr(wacom->hdev->name, "WACOM")) { 1954 /* name is in HID descriptor, use it */ 1955 strlcpy(name, wacom->hdev->name, sizeof(name)); 1956 1957 /* strip out excess whitespaces */ 1958 while (1) { 1959 char *gap = strstr(name, " "); 1960 if (gap == NULL) 1961 break; 1962 /* shift everything including the terminator */ 1963 memmove(gap, gap+1, strlen(gap)); 1964 } 1965 1966 /* strip off excessive prefixing */ 1967 if (strstr(name, "Wacom Co.,Ltd. Wacom ") == name) { 1968 int n = strlen(name); 1969 int x = strlen("Wacom Co.,Ltd. "); 1970 memmove(name, name+x, n-x+1); 1971 } 1972 if (strstr(name, "Wacom Co., Ltd. Wacom ") == name) { 1973 int n = strlen(name); 1974 int x = strlen("Wacom Co., Ltd. "); 1975 memmove(name, name+x, n-x+1); 1976 } 1977 1978 /* get rid of trailing whitespace */ 1979 if (name[strlen(name)-1] == ' ') 1980 name[strlen(name)-1] = '\0'; 1981 } else { 1982 /* no meaningful name retrieved. use product ID */ 1983 snprintf(name, sizeof(name), 1984 "%s %X", features->name, wacom->hdev->product); 1985 } 1986 } else { 1987 strlcpy(name, features->name, sizeof(name)); 1988 } 1989 1990 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s", 1991 name, suffix); 1992 1993 /* Append the device type to the name */ 1994 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name), 1995 "%s%s Pen", name, suffix); 1996 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name), 1997 "%s%s Finger", name, suffix); 1998 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name), 1999 "%s%s Pad", name, suffix); 2000 } 2001 2002 static void wacom_release_resources(struct wacom *wacom) 2003 { 2004 struct hid_device *hdev = wacom->hdev; 2005 2006 if (!wacom->resources) 2007 return; 2008 2009 devres_release_group(&hdev->dev, wacom); 2010 2011 wacom->resources = false; 2012 2013 wacom->wacom_wac.pen_input = NULL; 2014 wacom->wacom_wac.touch_input = NULL; 2015 wacom->wacom_wac.pad_input = NULL; 2016 } 2017 2018 static int wacom_parse_and_register(struct wacom *wacom, bool wireless) 2019 { 2020 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2021 struct wacom_features *features = &wacom_wac->features; 2022 struct hid_device *hdev = wacom->hdev; 2023 int error; 2024 unsigned int connect_mask = HID_CONNECT_HIDRAW; 2025 2026 features->pktlen = wacom_compute_pktlen(hdev); 2027 if (features->pktlen > WACOM_PKGLEN_MAX) 2028 return -EINVAL; 2029 2030 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL)) 2031 return -ENOMEM; 2032 2033 wacom->resources = true; 2034 2035 error = wacom_allocate_inputs(wacom); 2036 if (error) 2037 goto fail; 2038 2039 error = wacom_add_shared_data(hdev); 2040 if (error) 2041 goto fail; 2042 2043 /* 2044 * Bamboo Pad has a generic hid handling for the Pen, and we switch it 2045 * into debug mode for the touch part. 2046 * We ignore the other interfaces. 2047 */ 2048 if (features->type == BAMBOO_PAD) { 2049 if (features->pktlen == WACOM_PKGLEN_PENABLED) { 2050 features->type = HID_GENERIC; 2051 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) && 2052 (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) { 2053 error = -ENODEV; 2054 goto fail; 2055 } 2056 } 2057 2058 /* set the default size in case we do not get them from hid */ 2059 wacom_set_default_phy(features); 2060 2061 /* Retrieve the physical and logical size for touch devices */ 2062 wacom_retrieve_hid_descriptor(hdev, features); 2063 wacom_setup_device_quirks(wacom); 2064 2065 if (features->device_type == WACOM_DEVICETYPE_NONE && 2066 features->type != WIRELESS) { 2067 error = features->type == HID_GENERIC ? -ENODEV : 0; 2068 2069 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.", 2070 hdev->name, 2071 error ? "Ignoring" : "Assuming pen"); 2072 2073 if (error) 2074 goto fail; 2075 2076 features->device_type |= WACOM_DEVICETYPE_PEN; 2077 } 2078 2079 wacom_calculate_res(features); 2080 2081 wacom_update_name(wacom, wireless ? " (WL)" : ""); 2082 2083 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) 2084 wacom_wac->shared->touch = hdev; 2085 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN) 2086 wacom_wac->shared->pen = hdev; 2087 2088 if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) && 2089 (features->quirks & WACOM_QUIRK_BATTERY)) { 2090 error = wacom_initialize_battery(wacom); 2091 if (error) 2092 goto fail; 2093 } 2094 2095 error = wacom_register_inputs(wacom); 2096 if (error) 2097 goto fail; 2098 2099 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) { 2100 error = wacom_initialize_leds(wacom); 2101 if (error) 2102 goto fail; 2103 2104 error = wacom_initialize_remotes(wacom); 2105 if (error) 2106 goto fail; 2107 } 2108 2109 if (features->type == HID_GENERIC) 2110 connect_mask |= HID_CONNECT_DRIVER; 2111 2112 /* Regular HID work starts now */ 2113 error = hid_hw_start(hdev, connect_mask); 2114 if (error) { 2115 hid_err(hdev, "hw start failed\n"); 2116 goto fail; 2117 } 2118 2119 if (!wireless) { 2120 /* Note that if query fails it is not a hard failure */ 2121 wacom_query_tablet_data(hdev, features); 2122 } 2123 2124 /* touch only Bamboo doesn't support pen */ 2125 if ((features->type == BAMBOO_TOUCH) && 2126 (features->device_type & WACOM_DEVICETYPE_PEN)) { 2127 error = -ENODEV; 2128 goto fail_quirks; 2129 } 2130 2131 /* pen only Bamboo neither support touch nor pad */ 2132 if ((features->type == BAMBOO_PEN) && 2133 ((features->device_type & WACOM_DEVICETYPE_TOUCH) || 2134 (features->device_type & WACOM_DEVICETYPE_PAD))) { 2135 error = -ENODEV; 2136 goto fail_quirks; 2137 } 2138 2139 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) 2140 error = hid_hw_open(hdev); 2141 2142 if ((wacom_wac->features.type == INTUOSHT || 2143 wacom_wac->features.type == INTUOSHT2) && 2144 (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)) { 2145 wacom_wac->shared->type = wacom_wac->features.type; 2146 wacom_wac->shared->touch_input = wacom_wac->touch_input; 2147 } 2148 2149 devres_close_group(&hdev->dev, wacom); 2150 2151 return 0; 2152 2153 fail_quirks: 2154 hid_hw_stop(hdev); 2155 fail: 2156 wacom_release_resources(wacom); 2157 return error; 2158 } 2159 2160 static void wacom_wireless_work(struct work_struct *work) 2161 { 2162 struct wacom *wacom = container_of(work, struct wacom, wireless_work); 2163 struct usb_device *usbdev = wacom->usbdev; 2164 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2165 struct hid_device *hdev1, *hdev2; 2166 struct wacom *wacom1, *wacom2; 2167 struct wacom_wac *wacom_wac1, *wacom_wac2; 2168 int error; 2169 2170 /* 2171 * Regardless if this is a disconnect or a new tablet, 2172 * remove any existing input and battery devices. 2173 */ 2174 2175 wacom_destroy_battery(wacom); 2176 2177 /* Stylus interface */ 2178 hdev1 = usb_get_intfdata(usbdev->config->interface[1]); 2179 wacom1 = hid_get_drvdata(hdev1); 2180 wacom_wac1 = &(wacom1->wacom_wac); 2181 wacom_release_resources(wacom1); 2182 2183 /* Touch interface */ 2184 hdev2 = usb_get_intfdata(usbdev->config->interface[2]); 2185 wacom2 = hid_get_drvdata(hdev2); 2186 wacom_wac2 = &(wacom2->wacom_wac); 2187 wacom_release_resources(wacom2); 2188 2189 if (wacom_wac->pid == 0) { 2190 hid_info(wacom->hdev, "wireless tablet disconnected\n"); 2191 } else { 2192 const struct hid_device_id *id = wacom_ids; 2193 2194 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n", 2195 wacom_wac->pid); 2196 2197 while (id->bus) { 2198 if (id->vendor == USB_VENDOR_ID_WACOM && 2199 id->product == wacom_wac->pid) 2200 break; 2201 id++; 2202 } 2203 2204 if (!id->bus) { 2205 hid_info(wacom->hdev, "ignoring unknown PID.\n"); 2206 return; 2207 } 2208 2209 /* Stylus interface */ 2210 wacom_wac1->features = 2211 *((struct wacom_features *)id->driver_data); 2212 2213 wacom_wac1->pid = wacom_wac->pid; 2214 hid_hw_stop(hdev1); 2215 error = wacom_parse_and_register(wacom1, true); 2216 if (error) 2217 goto fail; 2218 2219 /* Touch interface */ 2220 if (wacom_wac1->features.touch_max || 2221 (wacom_wac1->features.type >= INTUOSHT && 2222 wacom_wac1->features.type <= BAMBOO_PT)) { 2223 wacom_wac2->features = 2224 *((struct wacom_features *)id->driver_data); 2225 wacom_wac2->pid = wacom_wac->pid; 2226 hid_hw_stop(hdev2); 2227 error = wacom_parse_and_register(wacom2, true); 2228 if (error) 2229 goto fail; 2230 } 2231 2232 strlcpy(wacom_wac->name, wacom_wac1->name, 2233 sizeof(wacom_wac->name)); 2234 error = wacom_initialize_battery(wacom); 2235 if (error) 2236 goto fail; 2237 } 2238 2239 return; 2240 2241 fail: 2242 wacom_release_resources(wacom1); 2243 wacom_release_resources(wacom2); 2244 return; 2245 } 2246 2247 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index) 2248 { 2249 struct wacom_remote *remote = wacom->remote; 2250 u32 serial = remote->remotes[index].serial; 2251 int i; 2252 unsigned long flags; 2253 2254 spin_lock_irqsave(&remote->remote_lock, flags); 2255 remote->remotes[index].registered = false; 2256 spin_unlock_irqrestore(&remote->remote_lock, flags); 2257 2258 if (remote->remotes[index].battery.battery) 2259 devres_release_group(&wacom->hdev->dev, 2260 &remote->remotes[index].battery.bat_desc); 2261 2262 if (remote->remotes[index].group.name) 2263 devres_release_group(&wacom->hdev->dev, 2264 &remote->remotes[index]); 2265 2266 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 2267 if (remote->remotes[i].serial == serial) { 2268 remote->remotes[i].serial = 0; 2269 remote->remotes[i].group.name = NULL; 2270 remote->remotes[i].registered = false; 2271 remote->remotes[i].battery.battery = NULL; 2272 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN; 2273 } 2274 } 2275 } 2276 2277 static int wacom_remote_create_one(struct wacom *wacom, u32 serial, 2278 unsigned int index) 2279 { 2280 struct wacom_remote *remote = wacom->remote; 2281 struct device *dev = &wacom->hdev->dev; 2282 int error, k; 2283 2284 /* A remote can pair more than once with an EKR, 2285 * check to make sure this serial isn't already paired. 2286 */ 2287 for (k = 0; k < WACOM_MAX_REMOTES; k++) { 2288 if (remote->remotes[k].serial == serial) 2289 break; 2290 } 2291 2292 if (k < WACOM_MAX_REMOTES) { 2293 remote->remotes[index].serial = serial; 2294 return 0; 2295 } 2296 2297 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL)) 2298 return -ENOMEM; 2299 2300 error = wacom_remote_create_attr_group(wacom, serial, index); 2301 if (error) 2302 goto fail; 2303 2304 remote->remotes[index].input = wacom_allocate_input(wacom); 2305 if (!remote->remotes[index].input) { 2306 error = -ENOMEM; 2307 goto fail; 2308 } 2309 remote->remotes[index].input->uniq = remote->remotes[index].group.name; 2310 remote->remotes[index].input->name = wacom->wacom_wac.pad_name; 2311 2312 if (!remote->remotes[index].input->name) { 2313 error = -EINVAL; 2314 goto fail; 2315 } 2316 2317 error = wacom_setup_pad_input_capabilities(remote->remotes[index].input, 2318 &wacom->wacom_wac); 2319 if (error) 2320 goto fail; 2321 2322 remote->remotes[index].serial = serial; 2323 2324 error = input_register_device(remote->remotes[index].input); 2325 if (error) 2326 goto fail; 2327 2328 error = wacom_led_groups_alloc_and_register_one( 2329 &remote->remotes[index].input->dev, 2330 wacom, index, 3, true); 2331 if (error) 2332 goto fail; 2333 2334 remote->remotes[index].registered = true; 2335 2336 devres_close_group(dev, &remote->remotes[index]); 2337 return 0; 2338 2339 fail: 2340 devres_release_group(dev, &remote->remotes[index]); 2341 remote->remotes[index].serial = 0; 2342 return error; 2343 } 2344 2345 static int wacom_remote_attach_battery(struct wacom *wacom, int index) 2346 { 2347 struct wacom_remote *remote = wacom->remote; 2348 int error; 2349 2350 if (!remote->remotes[index].registered) 2351 return 0; 2352 2353 if (remote->remotes[index].battery.battery) 2354 return 0; 2355 2356 if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN) 2357 return 0; 2358 2359 error = __wacom_initialize_battery(wacom, 2360 &wacom->remote->remotes[index].battery); 2361 if (error) 2362 return error; 2363 2364 return 0; 2365 } 2366 2367 static void wacom_remote_work(struct work_struct *work) 2368 { 2369 struct wacom *wacom = container_of(work, struct wacom, remote_work); 2370 struct wacom_remote *remote = wacom->remote; 2371 struct wacom_remote_data data; 2372 unsigned long flags; 2373 unsigned int count; 2374 u32 serial; 2375 int i; 2376 2377 spin_lock_irqsave(&remote->remote_lock, flags); 2378 2379 count = kfifo_out(&remote->remote_fifo, &data, sizeof(data)); 2380 2381 if (count != sizeof(data)) { 2382 hid_err(wacom->hdev, 2383 "workitem triggered without status available\n"); 2384 spin_unlock_irqrestore(&remote->remote_lock, flags); 2385 return; 2386 } 2387 2388 if (!kfifo_is_empty(&remote->remote_fifo)) 2389 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE); 2390 2391 spin_unlock_irqrestore(&remote->remote_lock, flags); 2392 2393 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 2394 serial = data.remote[i].serial; 2395 if (data.remote[i].connected) { 2396 2397 if (remote->remotes[i].serial == serial) { 2398 wacom_remote_attach_battery(wacom, i); 2399 continue; 2400 } 2401 2402 if (remote->remotes[i].serial) 2403 wacom_remote_destroy_one(wacom, i); 2404 2405 wacom_remote_create_one(wacom, serial, i); 2406 2407 } else if (remote->remotes[i].serial) { 2408 wacom_remote_destroy_one(wacom, i); 2409 } 2410 } 2411 } 2412 2413 static int wacom_probe(struct hid_device *hdev, 2414 const struct hid_device_id *id) 2415 { 2416 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 2417 struct usb_device *dev = interface_to_usbdev(intf); 2418 struct wacom *wacom; 2419 struct wacom_wac *wacom_wac; 2420 struct wacom_features *features; 2421 int error; 2422 2423 if (!id->driver_data) 2424 return -EINVAL; 2425 2426 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; 2427 2428 /* hid-core sets this quirk for the boot interface */ 2429 hdev->quirks &= ~HID_QUIRK_NOGET; 2430 2431 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL); 2432 if (!wacom) 2433 return -ENOMEM; 2434 2435 hid_set_drvdata(hdev, wacom); 2436 wacom->hdev = hdev; 2437 2438 wacom_wac = &wacom->wacom_wac; 2439 wacom_wac->features = *((struct wacom_features *)id->driver_data); 2440 features = &wacom_wac->features; 2441 2442 if (features->check_for_hid_type && features->hid_type != hdev->type) { 2443 error = -ENODEV; 2444 goto fail; 2445 } 2446 2447 wacom_wac->hid_data.inputmode = -1; 2448 wacom_wac->mode_report = -1; 2449 2450 wacom->usbdev = dev; 2451 wacom->intf = intf; 2452 mutex_init(&wacom->lock); 2453 INIT_WORK(&wacom->wireless_work, wacom_wireless_work); 2454 INIT_WORK(&wacom->battery_work, wacom_battery_work); 2455 INIT_WORK(&wacom->remote_work, wacom_remote_work); 2456 2457 /* ask for the report descriptor to be loaded by HID */ 2458 error = hid_parse(hdev); 2459 if (error) { 2460 hid_err(hdev, "parse failed\n"); 2461 goto fail; 2462 } 2463 2464 error = wacom_parse_and_register(wacom, false); 2465 if (error) 2466 goto fail; 2467 2468 if (hdev->bus == BUS_BLUETOOTH) { 2469 error = device_create_file(&hdev->dev, &dev_attr_speed); 2470 if (error) 2471 hid_warn(hdev, 2472 "can't create sysfs speed attribute err: %d\n", 2473 error); 2474 } 2475 2476 return 0; 2477 2478 fail: 2479 hid_set_drvdata(hdev, NULL); 2480 return error; 2481 } 2482 2483 static void wacom_remove(struct hid_device *hdev) 2484 { 2485 struct wacom *wacom = hid_get_drvdata(hdev); 2486 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2487 struct wacom_features *features = &wacom_wac->features; 2488 2489 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) 2490 hid_hw_close(hdev); 2491 2492 hid_hw_stop(hdev); 2493 2494 cancel_work_sync(&wacom->wireless_work); 2495 cancel_work_sync(&wacom->battery_work); 2496 cancel_work_sync(&wacom->remote_work); 2497 if (hdev->bus == BUS_BLUETOOTH) 2498 device_remove_file(&hdev->dev, &dev_attr_speed); 2499 2500 hid_set_drvdata(hdev, NULL); 2501 } 2502 2503 #ifdef CONFIG_PM 2504 static int wacom_resume(struct hid_device *hdev) 2505 { 2506 struct wacom *wacom = hid_get_drvdata(hdev); 2507 struct wacom_features *features = &wacom->wacom_wac.features; 2508 2509 mutex_lock(&wacom->lock); 2510 2511 /* switch to wacom mode first */ 2512 wacom_query_tablet_data(hdev, features); 2513 wacom_led_control(wacom); 2514 2515 mutex_unlock(&wacom->lock); 2516 2517 return 0; 2518 } 2519 2520 static int wacom_reset_resume(struct hid_device *hdev) 2521 { 2522 return wacom_resume(hdev); 2523 } 2524 #endif /* CONFIG_PM */ 2525 2526 static struct hid_driver wacom_driver = { 2527 .name = "wacom", 2528 .id_table = wacom_ids, 2529 .probe = wacom_probe, 2530 .remove = wacom_remove, 2531 .report = wacom_wac_report, 2532 #ifdef CONFIG_PM 2533 .resume = wacom_resume, 2534 .reset_resume = wacom_reset_resume, 2535 #endif 2536 .raw_event = wacom_raw_event, 2537 }; 2538 module_hid_driver(wacom_driver); 2539 2540 MODULE_VERSION(DRIVER_VERSION); 2541 MODULE_AUTHOR(DRIVER_AUTHOR); 2542 MODULE_DESCRIPTION(DRIVER_DESC); 2543 MODULE_LICENSE(DRIVER_LICENSE); 2544