drivers/hid/wacom_sys.c

   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/hid.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
  27 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
  28 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
  29
  30 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
  31                             size_t size, unsigned int retries)
  32 {
  33         int retval;
  34
  35         do {
  36                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  37                                 HID_REQ_GET_REPORT);
  38         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  39
  40         return retval;
  41 }
  42
  43 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
  44                             size_t size, unsigned int retries)
  45 {
  46         int retval;
  47
  48         do {
  49                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  50                                 HID_REQ_SET_REPORT);
  51         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  52
  53         return retval;
  54 }
  55
  56 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
  57                 u8 *raw_data, int size)
  58 {
  59         struct wacom *wacom = hid_get_drvdata(hdev);
  60
  61         if (size > WACOM_PKGLEN_MAX)
  62                 return 1;
  63
  64         memcpy(wacom->wacom_wac.data, raw_data, size);
  65
  66         wacom_wac_irq(&wacom->wacom_wac, size);
  67
  68         return 0;
  69 }
  70
  71 static int wacom_open(struct input_dev *dev)
  72 {
  73         struct wacom *wacom = input_get_drvdata(dev);
  74         int retval;
  75
  76         mutex_lock(&wacom->lock);
  77         retval = hid_hw_open(wacom->hdev);
  78         mutex_unlock(&wacom->lock);
  79
  80         return retval;
  81 }
  82
  83 static void wacom_close(struct input_dev *dev)
  84 {
  85         struct wacom *wacom = input_get_drvdata(dev);
  86
  87         mutex_lock(&wacom->lock);
  88         hid_hw_close(wacom->hdev);
  89         mutex_unlock(&wacom->lock);
  90 }
  91
  92 /*
  93  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
  94  */
  95 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
  96                                unsigned unit, int exponent)
  97 {
  98         struct hid_field field = {
  99                 .logical_maximum = logical_extents,
 100                 .physical_maximum = physical_extents,
 101                 .unit = unit,
 102                 .unit_exponent = exponent,
 103         };
 104
 105         return hidinput_calc_abs_res(&field, ABS_X);
 106 }
 107
 108 static void wacom_feature_mapping(struct hid_device *hdev,
 109                 struct hid_field *field, struct hid_usage *usage)
 110 {
 111         struct wacom *wacom = hid_get_drvdata(hdev);
 112         struct wacom_features *features = &wacom->wacom_wac.features;
 113         u8 *data;
 114         int ret;
 115
 116         switch (usage->hid) {
 117         case HID_DG_CONTACTMAX:
 118                 /* leave touch_max as is if predefined */
 119                 if (!features->touch_max) {
 120                         /* read manually */
 121                         data = kzalloc(2, GFP_KERNEL);
 122                         if (!data)
 123                                 break;
 124                         data[0] = field->report->id;
 125                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 126                                                 data, 2, 0);
 127                         if (ret == 2)
 128                                 features->touch_max = data[1];
 129                         kfree(data);
 130                 }
 131                 break;
 132         }
 133 }
 134
 135 /*
 136  * Interface Descriptor of wacom devices can be incomplete and
 137  * inconsistent so wacom_features table is used to store stylus
 138  * device's packet lengths, various maximum values, and tablet
 139  * resolution based on product ID's.
 140  *
 141  * For devices that contain 2 interfaces, wacom_features table is
 142  * inaccurate for the touch interface.  Since the Interface Descriptor
 143  * for touch interfaces has pretty complete data, this function exists
 144  * to query tablet for this missing information instead of hard coding in
 145  * an additional table.
 146  *
 147  * A typical Interface Descriptor for a stylus will contain a
 148  * boot mouse application collection that is not of interest and this
 149  * function will ignore it.
 150  *
 151  * It also contains a digitizer application collection that also is not
 152  * of interest since any information it contains would be duplicate
 153  * of what is in wacom_features. Usually it defines a report of an array
 154  * of bytes that could be used as max length of the stylus packet returned.
 155  * If it happens to define a Digitizer-Stylus Physical Collection then
 156  * the X and Y logical values contain valid data but it is ignored.
 157  *
 158  * A typical Interface Descriptor for a touch interface will contain a
 159  * Digitizer-Finger Physical Collection which will define both logical
 160  * X/Y maximum as well as the physical size of tablet. Since touch
 161  * interfaces haven't supported pressure or distance, this is enough
 162  * information to override invalid values in the wacom_features table.
 163  *
 164  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 165  * data. We deal with them after returning from this function.
 166  */
 167 static void wacom_usage_mapping(struct hid_device *hdev,
 168                 struct hid_field *field, struct hid_usage *usage)
 169 {
 170         struct wacom *wacom = hid_get_drvdata(hdev);
 171         struct wacom_features *features = &wacom->wacom_wac.features;
 172         bool finger = (field->logical == HID_DG_FINGER) ||
 173                       (field->physical == HID_DG_FINGER);
 174         bool pen = (field->logical == HID_DG_STYLUS) ||
 175                    (field->physical == HID_DG_STYLUS);
 176
 177         /*
 178         * Requiring Stylus Usage will ignore boot mouse
 179         * X/Y values and some cases of invalid Digitizer X/Y
 180         * values commonly reported.
 181         */
 182         if (!pen && !finger)
 183                 return;
 184
 185         if (finger && !features->touch_max)
 186                 /* touch device at least supports one touch point */
 187                 features->touch_max = 1;
 188
 189         switch (usage->hid) {
 190         case HID_GD_X:
 191                 features->x_max = field->logical_maximum;
 192                 if (finger) {
 193                         features->device_type = BTN_TOOL_FINGER;
 194                         features->x_phy = field->physical_maximum;
 195                         if (features->type != BAMBOO_PT) {
 196                                 features->unit = field->unit;
 197                                 features->unitExpo = field->unit_exponent;
 198                         }
 199                 } else {
 200                         features->device_type = BTN_TOOL_PEN;
 201                 }
 202                 break;
 203         case HID_GD_Y:
 204                 features->y_max = field->logical_maximum;
 205                 if (finger) {
 206                         features->y_phy = field->physical_maximum;
 207                         if (features->type != BAMBOO_PT) {
 208                                 features->unit = field->unit;
 209                                 features->unitExpo = field->unit_exponent;
 210                         }
 211                 }
 212                 break;
 213         case HID_DG_TIPPRESSURE:
 214                 if (pen)
 215                         features->pressure_max = field->logical_maximum;
 216                 break;
 217         }
 218 }
 219
 220 static void wacom_parse_hid(struct hid_device *hdev,
 221                            struct wacom_features *features)
 222 {
 223         struct hid_report_enum *rep_enum;
 224         struct hid_report *hreport;
 225         int i, j;
 226
 227         /* check features first */
 228         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 229         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 230                 for (i = 0; i < hreport->maxfield; i++) {
 231                         /* Ignore if report count is out of bounds. */
 232                         if (hreport->field[i]->report_count < 1)
 233                                 continue;
 234
 235                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 236                                 wacom_feature_mapping(hdev, hreport->field[i],
 237                                                 hreport->field[i]->usage + j);
 238                         }
 239                 }
 240         }
 241
 242         /* now check the input usages */
 243         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 244         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 245
 246                 if (!hreport->maxfield)
 247                         continue;
 248
 249                 for (i = 0; i < hreport->maxfield; i++)
 250                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 251                                 wacom_usage_mapping(hdev, hreport->field[i],
 252                                                 hreport->field[i]->usage + j);
 253         }
 254 }
 255
 256 static int wacom_set_device_mode(struct hid_device *hdev, int report_id,
 257                 int length, int mode)
 258 {
 259         unsigned char *rep_data;
 260         int error = -ENOMEM, limit = 0;
 261
 262         rep_data = kzalloc(length, GFP_KERNEL);
 263         if (!rep_data)
 264                 return error;
 265
 266         do {
 267                 rep_data[0] = report_id;
 268                 rep_data[1] = mode;
 269
 270                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 271                                          length, 1);
 272                 if (error >= 0)
 273                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 274                                                  rep_data, length, 1);
 275         } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
 276
 277         kfree(rep_data);
 278
 279         return error < 0 ? error : 0;
 280 }
 281
 282 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 283                 struct wacom_features *features)
 284 {
 285         struct wacom *wacom = hid_get_drvdata(hdev);
 286         int ret;
 287         u8 rep_data[2];
 288
 289         switch (features->type) {
 290         case GRAPHIRE_BT:
 291                 rep_data[0] = 0x03;
 292                 rep_data[1] = 0x00;
 293                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 294                                         3);
 295
 296                 if (ret >= 0) {
 297                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 298                         rep_data[1] = 0x00;
 299
 300                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 301                                                 rep_data, 2, 3);
 302
 303                         if (ret >= 0) {
 304                                 wacom->wacom_wac.bt_high_speed = speed;
 305                                 return 0;
 306                         }
 307                 }
 308
 309                 /*
 310                  * Note that if the raw queries fail, it's not a hard failure
 311                  * and it is safe to continue
 312                  */
 313                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 314                          rep_data[0], ret);
 315                 break;
 316         case INTUOS4WL:
 317                 if (speed == 1)
 318                         wacom->wacom_wac.bt_features &= ~0x20;
 319                 else
 320                         wacom->wacom_wac.bt_features |= 0x20;
 321
 322                 rep_data[0] = 0x03;
 323                 rep_data[1] = wacom->wacom_wac.bt_features;
 324
 325                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 326                                         1);
 327                 if (ret >= 0)
 328                         wacom->wacom_wac.bt_high_speed = speed;
 329                 break;
 330         }
 331
 332         return 0;
 333 }
 334
 335 /*
 336  * Switch the tablet into its most-capable mode. Wacom tablets are
 337  * typically configured to power-up in a mode which sends mouse-like
 338  * reports to the OS. To get absolute position, pressure data, etc.
 339  * from the tablet, it is necessary to switch the tablet out of this
 340  * mode and into one which sends the full range of tablet data.
 341  */
 342 static int wacom_query_tablet_data(struct hid_device *hdev,
 343                 struct wacom_features *features)
 344 {
 345         if (hdev->bus == BUS_BLUETOOTH)
 346                 return wacom_bt_query_tablet_data(hdev, 1, features);
 347
 348         if (features->device_type == BTN_TOOL_FINGER) {
 349                 if (features->type > TABLETPC) {
 350                         /* MT Tablet PC touch */
 351                         return wacom_set_device_mode(hdev, 3, 4, 4);
 352                 }
 353                 else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
 354                         return wacom_set_device_mode(hdev, 18, 3, 2);
 355                 }
 356         } else if (features->device_type == BTN_TOOL_PEN) {
 357                 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
 358                         return wacom_set_device_mode(hdev, 2, 2, 2);
 359                 }
 360         }
 361
 362         return 0;
 363 }
 364
 365 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 366                                          struct wacom_features *features)
 367 {
 368         struct wacom *wacom = hid_get_drvdata(hdev);
 369         struct usb_interface *intf = wacom->intf;
 370
 371         /* default features */
 372         features->device_type = BTN_TOOL_PEN;
 373         features->x_fuzz = 4;
 374         features->y_fuzz = 4;
 375         features->pressure_fuzz = 0;
 376         features->distance_fuzz = 0;
 377
 378         /*
 379          * The wireless device HID is basic and layout conflicts with
 380          * other tablets (monitor and touch interface can look like pen).
 381          * Skip the query for this type and modify defaults based on
 382          * interface number.
 383          */
 384         if (features->type == WIRELESS) {
 385                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
 386                         features->device_type = 0;
 387                 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
 388                         features->device_type = BTN_TOOL_FINGER;
 389                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
 390                 }
 391         }
 392
 393         /* only devices that support touch need to retrieve the info */
 394         if (features->type < BAMBOO_PT)
 395                 return;
 396
 397         wacom_parse_hid(hdev, features);
 398 }
 399
 400 struct wacom_hdev_data {
 401         struct list_head list;
 402         struct kref kref;
 403         struct hid_device *dev;
 404         struct wacom_shared shared;
 405 };
 406
 407 static LIST_HEAD(wacom_udev_list);
 408 static DEFINE_MUTEX(wacom_udev_list_lock);
 409
 410 static bool wacom_are_sibling(struct hid_device *hdev,
 411                 struct hid_device *sibling)
 412 {
 413         struct wacom *wacom = hid_get_drvdata(hdev);
 414         struct wacom_features *features = &wacom->wacom_wac.features;
 415         int vid = features->oVid;
 416         int pid = features->oPid;
 417         int n1,n2;
 418
 419         if (vid == 0 && pid == 0) {
 420                 vid = hdev->vendor;
 421                 pid = hdev->product;
 422         }
 423
 424         if (vid != sibling->vendor || pid != sibling->product)
 425                 return false;
 426
 427         /* Compare the physical path. */
 428         n1 = strrchr(hdev->phys, '.') - hdev->phys;
 429         n2 = strrchr(sibling->phys, '.') - sibling->phys;
 430         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 431                 return false;
 432
 433         return !strncmp(hdev->phys, sibling->phys, n1);
 434 }
 435
 436 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 437 {
 438         struct wacom_hdev_data *data;
 439
 440         list_for_each_entry(data, &wacom_udev_list, list) {
 441                 if (wacom_are_sibling(hdev, data->dev)) {
 442                         kref_get(&data->kref);
 443                         return data;
 444                 }
 445         }
 446
 447         return NULL;
 448 }
 449
 450 static int wacom_add_shared_data(struct hid_device *hdev)
 451 {
 452         struct wacom *wacom = hid_get_drvdata(hdev);
 453         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 454         struct wacom_hdev_data *data;
 455         int retval = 0;
 456
 457         mutex_lock(&wacom_udev_list_lock);
 458
 459         data = wacom_get_hdev_data(hdev);
 460         if (!data) {
 461                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 462                 if (!data) {
 463                         retval = -ENOMEM;
 464                         goto out;
 465                 }
 466
 467                 kref_init(&data->kref);
 468                 data->dev = hdev;
 469                 list_add_tail(&data->list, &wacom_udev_list);
 470         }
 471
 472         wacom_wac->shared = &data->shared;
 473
 474 out:
 475         mutex_unlock(&wacom_udev_list_lock);
 476         return retval;
 477 }
 478
 479 static void wacom_release_shared_data(struct kref *kref)
 480 {
 481         struct wacom_hdev_data *data =
 482                 container_of(kref, struct wacom_hdev_data, kref);
 483
 484         mutex_lock(&wacom_udev_list_lock);
 485         list_del(&data->list);
 486         mutex_unlock(&wacom_udev_list_lock);
 487
 488         kfree(data);
 489 }
 490
 491 static void wacom_remove_shared_data(struct wacom_wac *wacom)
 492 {
 493         struct wacom_hdev_data *data;
 494
 495         if (wacom->shared) {
 496                 data = container_of(wacom->shared, struct wacom_hdev_data, shared);
 497                 kref_put(&data->kref, wacom_release_shared_data);
 498                 wacom->shared = NULL;
 499         }
 500 }
 501
 502 static int wacom_led_control(struct wacom *wacom)
 503 {
 504         unsigned char *buf;
 505         int retval;
 506         unsigned char report_id = WAC_CMD_LED_CONTROL;
 507         int buf_size = 9;
 508
 509         if (wacom->wacom_wac.pid) { /* wireless connected */
 510                 report_id = WAC_CMD_WL_LED_CONTROL;
 511                 buf_size = 13;
 512         }
 513         buf = kzalloc(buf_size, GFP_KERNEL);
 514         if (!buf)
 515                 return -ENOMEM;
 516
 517         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 518             wacom->wacom_wac.features.type <= INTUOSPL) {
 519                 /*
 520                  * Touch Ring and crop mark LED luminance may take on
 521                  * one of four values:
 522                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 523                  */
 524                 int ring_led = wacom->led.select[0] & 0x03;
 525                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 526                 int crop_lum = 0;
 527                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 528
 529                 buf[0] = report_id;
 530                 if (wacom->wacom_wac.pid) {
 531                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 532                                          buf, buf_size, WAC_CMD_RETRIES);
 533                         buf[0] = report_id;
 534                         buf[4] = led_bits;
 535                 } else
 536                         buf[1] = led_bits;
 537         }
 538         else {
 539                 int led = wacom->led.select[0] | 0x4;
 540
 541                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 542                     wacom->wacom_wac.features.type == WACOM_24HD)
 543                         led |= (wacom->led.select[1] << 4) | 0x40;
 544
 545                 buf[0] = report_id;
 546                 buf[1] = led;
 547                 buf[2] = wacom->led.llv;
 548                 buf[3] = wacom->led.hlv;
 549                 buf[4] = wacom->led.img_lum;
 550         }
 551
 552         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 553                                   WAC_CMD_RETRIES);
 554         kfree(buf);
 555
 556         return retval;
 557 }
 558
 559 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 560                 const unsigned len, const void *img)
 561 {
 562         unsigned char *buf;
 563         int i, retval;
 564         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 565
 566         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 567         if (!buf)
 568                 return -ENOMEM;
 569
 570         /* Send 'start' command */
 571         buf[0] = WAC_CMD_ICON_START;
 572         buf[1] = 1;
 573         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 574                                   WAC_CMD_RETRIES);
 575         if (retval < 0)
 576                 goto out;
 577
 578         buf[0] = xfer_id;
 579         buf[1] = button_id & 0x07;
 580         for (i = 0; i < 4; i++) {
 581                 buf[2] = i;
 582                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 583
 584                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 585                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 586                 if (retval < 0)
 587                         break;
 588         }
 589
 590         /* Send 'stop' */
 591         buf[0] = WAC_CMD_ICON_START;
 592         buf[1] = 0;
 593         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 594                          WAC_CMD_RETRIES);
 595
 596 out:
 597         kfree(buf);
 598         return retval;
 599 }
 600
 601 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 602                                       const char *buf, size_t count)
 603 {
 604         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 605         struct wacom *wacom = hid_get_drvdata(hdev);
 606         unsigned int id;
 607         int err;
 608
 609         err = kstrtouint(buf, 10, &id);
 610         if (err)
 611                 return err;
 612
 613         mutex_lock(&wacom->lock);
 614
 615         wacom->led.select[set_id] = id & 0x3;
 616         err = wacom_led_control(wacom);
 617
 618         mutex_unlock(&wacom->lock);
 619
 620         return err < 0 ? err : count;
 621 }
 622
 623 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 624 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 625         struct device_attribute *attr, const char *buf, size_t count)   \
 626 {                                                                       \
 627         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 628 }                                                                       \
 629 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 630         struct device_attribute *attr, char *buf)                       \
 631 {                                                                       \
 632         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 633         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 634         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 635                          wacom->led.select[SET_ID]);                    \
 636 }                                                                       \
 637 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 638                     wacom_led##SET_ID##_select_show,                    \
 639                     wacom_led##SET_ID##_select_store)
 640
 641 DEVICE_LED_SELECT_ATTR(0);
 642 DEVICE_LED_SELECT_ATTR(1);
 643
 644 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 645                                      const char *buf, size_t count)
 646 {
 647         unsigned int value;
 648         int err;
 649
 650         err = kstrtouint(buf, 10, &value);
 651         if (err)
 652                 return err;
 653
 654         mutex_lock(&wacom->lock);
 655
 656         *dest = value & 0x7f;
 657         err = wacom_led_control(wacom);
 658
 659         mutex_unlock(&wacom->lock);
 660
 661         return err < 0 ? err : count;
 662 }
 663
 664 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 665 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 666         struct device_attribute *attr, const char *buf, size_t count)   \
 667 {                                                                       \
 668         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 669         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 670                                                                         \
 671         return wacom_luminance_store(wacom, &wacom->led.field,          \
 672                                      buf, count);                       \
 673 }                                                                       \
 674 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 675         struct device_attribute *attr, char *buf)                       \
 676 {                                                                       \
 677         struct wacom *wacom = dev_get_drvdata(dev);                     \
 678         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 679 }                                                                       \
 680 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 681                    wacom_##name##_luminance_show,                       \
 682                    wacom_##name##_luminance_store)
 683
 684 DEVICE_LUMINANCE_ATTR(status0, llv);
 685 DEVICE_LUMINANCE_ATTR(status1, hlv);
 686 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 687
 688 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 689                                         const char *buf, size_t count)
 690 {
 691         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 692         struct wacom *wacom = hid_get_drvdata(hdev);
 693         int err;
 694         unsigned len;
 695         u8 xfer_id;
 696
 697         if (hdev->bus == BUS_BLUETOOTH) {
 698                 len = 256;
 699                 xfer_id = WAC_CMD_ICON_BT_XFER;
 700         } else {
 701                 len = 1024;
 702                 xfer_id = WAC_CMD_ICON_XFER;
 703         }
 704
 705         if (count != len)
 706                 return -EINVAL;
 707
 708         mutex_lock(&wacom->lock);
 709
 710         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
 711
 712         mutex_unlock(&wacom->lock);
 713
 714         return err < 0 ? err : count;
 715 }
 716
 717 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 718 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 719         struct device_attribute *attr, const char *buf, size_t count)   \
 720 {                                                                       \
 721         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 722 }                                                                       \
 723 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
 724                    NULL, wacom_btnimg##BUTTON_ID##_store)
 725
 726 DEVICE_BTNIMG_ATTR(0);
 727 DEVICE_BTNIMG_ATTR(1);
 728 DEVICE_BTNIMG_ATTR(2);
 729 DEVICE_BTNIMG_ATTR(3);
 730 DEVICE_BTNIMG_ATTR(4);
 731 DEVICE_BTNIMG_ATTR(5);
 732 DEVICE_BTNIMG_ATTR(6);
 733 DEVICE_BTNIMG_ATTR(7);
 734
 735 static struct attribute *cintiq_led_attrs[] = {
 736         &dev_attr_status_led0_select.attr,
 737         &dev_attr_status_led1_select.attr,
 738         NULL
 739 };
 740
 741 static struct attribute_group cintiq_led_attr_group = {
 742         .name = "wacom_led",
 743         .attrs = cintiq_led_attrs,
 744 };
 745
 746 static struct attribute *intuos4_led_attrs[] = {
 747         &dev_attr_status0_luminance.attr,
 748         &dev_attr_status1_luminance.attr,
 749         &dev_attr_status_led0_select.attr,
 750         &dev_attr_buttons_luminance.attr,
 751         &dev_attr_button0_rawimg.attr,
 752         &dev_attr_button1_rawimg.attr,
 753         &dev_attr_button2_rawimg.attr,
 754         &dev_attr_button3_rawimg.attr,
 755         &dev_attr_button4_rawimg.attr,
 756         &dev_attr_button5_rawimg.attr,
 757         &dev_attr_button6_rawimg.attr,
 758         &dev_attr_button7_rawimg.attr,
 759         NULL
 760 };
 761
 762 static struct attribute_group intuos4_led_attr_group = {
 763         .name = "wacom_led",
 764         .attrs = intuos4_led_attrs,
 765 };
 766
 767 static struct attribute *intuos5_led_attrs[] = {
 768         &dev_attr_status0_luminance.attr,
 769         &dev_attr_status_led0_select.attr,
 770         NULL
 771 };
 772
 773 static struct attribute_group intuos5_led_attr_group = {
 774         .name = "wacom_led",
 775         .attrs = intuos5_led_attrs,
 776 };
 777
 778 static int wacom_initialize_leds(struct wacom *wacom)
 779 {
 780         int error;
 781
 782         /* Initialize default values */
 783         switch (wacom->wacom_wac.features.type) {
 784         case INTUOS4S:
 785         case INTUOS4:
 786         case INTUOS4WL:
 787         case INTUOS4L:
 788                 wacom->led.select[0] = 0;
 789                 wacom->led.select[1] = 0;
 790                 wacom->led.llv = 10;
 791                 wacom->led.hlv = 20;
 792                 wacom->led.img_lum = 10;
 793                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 794                                            &intuos4_led_attr_group);
 795                 break;
 796
 797         case WACOM_24HD:
 798         case WACOM_21UX2:
 799                 wacom->led.select[0] = 0;
 800                 wacom->led.select[1] = 0;
 801                 wacom->led.llv = 0;
 802                 wacom->led.hlv = 0;
 803                 wacom->led.img_lum = 0;
 804
 805                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 806                                            &cintiq_led_attr_group);
 807                 break;
 808
 809         case INTUOS5S:
 810         case INTUOS5:
 811         case INTUOS5L:
 812         case INTUOSPS:
 813         case INTUOSPM:
 814         case INTUOSPL:
 815                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) {
 816                         wacom->led.select[0] = 0;
 817                         wacom->led.select[1] = 0;
 818                         wacom->led.llv = 32;
 819                         wacom->led.hlv = 0;
 820                         wacom->led.img_lum = 0;
 821
 822                         error = sysfs_create_group(&wacom->hdev->dev.kobj,
 823                                                   &intuos5_led_attr_group);
 824                 } else
 825                         return 0;
 826                 break;
 827
 828         default:
 829                 return 0;
 830         }
 831
 832         if (error) {
 833                 hid_err(wacom->hdev,
 834                         "cannot create sysfs group err: %d\n", error);
 835                 return error;
 836         }
 837         wacom_led_control(wacom);
 838         wacom->led_initialized = true;
 839
 840         return 0;
 841 }
 842
 843 static void wacom_destroy_leds(struct wacom *wacom)
 844 {
 845         if (!wacom->led_initialized)
 846                 return;
 847
 848         wacom->led_initialized = false;
 849
 850         switch (wacom->wacom_wac.features.type) {
 851         case INTUOS4S:
 852         case INTUOS4:
 853         case INTUOS4WL:
 854         case INTUOS4L:
 855                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 856                                    &intuos4_led_attr_group);
 857                 break;
 858
 859         case WACOM_24HD:
 860         case WACOM_21UX2:
 861                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 862                                    &cintiq_led_attr_group);
 863                 break;
 864
 865         case INTUOS5S:
 866         case INTUOS5:
 867         case INTUOS5L:
 868         case INTUOSPS:
 869         case INTUOSPM:
 870         case INTUOSPL:
 871                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN)
 872                         sysfs_remove_group(&wacom->hdev->dev.kobj,
 873                                            &intuos5_led_attr_group);
 874                 break;
 875         }
 876 }
 877
 878 static enum power_supply_property wacom_battery_props[] = {
 879         POWER_SUPPLY_PROP_STATUS,
 880         POWER_SUPPLY_PROP_SCOPE,
 881         POWER_SUPPLY_PROP_CAPACITY
 882 };
 883
 884 static enum power_supply_property wacom_ac_props[] = {
 885         POWER_SUPPLY_PROP_PRESENT,
 886         POWER_SUPPLY_PROP_ONLINE,
 887         POWER_SUPPLY_PROP_SCOPE,
 888 };
 889
 890 static int wacom_battery_get_property(struct power_supply *psy,
 891                                       enum power_supply_property psp,
 892                                       union power_supply_propval *val)
 893 {
 894         struct wacom *wacom = container_of(psy, struct wacom, battery);
 895         int ret = 0;
 896
 897         switch (psp) {
 898                 case POWER_SUPPLY_PROP_SCOPE:
 899                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 900                         break;
 901                 case POWER_SUPPLY_PROP_CAPACITY:
 902                         val->intval =
 903                                 wacom->wacom_wac.battery_capacity;
 904                         break;
 905                 case POWER_SUPPLY_PROP_STATUS:
 906                         if (wacom->wacom_wac.bat_charging)
 907                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 908                         else if (wacom->wacom_wac.battery_capacity == 100 &&
 909                                     wacom->wacom_wac.ps_connected)
 910                                 val->intval = POWER_SUPPLY_STATUS_FULL;
 911                         else
 912                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 913                         break;
 914                 default:
 915                         ret = -EINVAL;
 916                         break;
 917         }
 918
 919         return ret;
 920 }
 921
 922 static int wacom_ac_get_property(struct power_supply *psy,
 923                                 enum power_supply_property psp,
 924                                 union power_supply_propval *val)
 925 {
 926         struct wacom *wacom = container_of(psy, struct wacom, ac);
 927         int ret = 0;
 928
 929         switch (psp) {
 930         case POWER_SUPPLY_PROP_PRESENT:
 931                 /* fall through */
 932         case POWER_SUPPLY_PROP_ONLINE:
 933                 val->intval = wacom->wacom_wac.ps_connected;
 934                 break;
 935         case POWER_SUPPLY_PROP_SCOPE:
 936                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 937                 break;
 938         default:
 939                 ret = -EINVAL;
 940                 break;
 941         }
 942         return ret;
 943 }
 944
 945 static int wacom_initialize_battery(struct wacom *wacom)
 946 {
 947         static atomic_t battery_no = ATOMIC_INIT(0);
 948         int error;
 949         unsigned long n;
 950
 951         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {
 952                 n = atomic_inc_return(&battery_no) - 1;
 953
 954                 wacom->battery.properties = wacom_battery_props;
 955                 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
 956                 wacom->battery.get_property = wacom_battery_get_property;
 957                 sprintf(wacom->wacom_wac.bat_name, "wacom_battery_%ld", n);
 958                 wacom->battery.name = wacom->wacom_wac.bat_name;
 959                 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
 960                 wacom->battery.use_for_apm = 0;
 961
 962                 wacom->ac.properties = wacom_ac_props;
 963                 wacom->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
 964                 wacom->ac.get_property = wacom_ac_get_property;
 965                 sprintf(wacom->wacom_wac.ac_name, "wacom_ac_%ld", n);
 966                 wacom->ac.name = wacom->wacom_wac.ac_name;
 967                 wacom->ac.type = POWER_SUPPLY_TYPE_MAINS;
 968                 wacom->ac.use_for_apm = 0;
 969
 970                 error = power_supply_register(&wacom->hdev->dev,
 971                                               &wacom->battery);
 972                 if (error)
 973                         return error;
 974
 975                 power_supply_powers(&wacom->battery, &wacom->hdev->dev);
 976
 977                 error = power_supply_register(&wacom->hdev->dev, &wacom->ac);
 978                 if (error) {
 979                         power_supply_unregister(&wacom->battery);
 980                         return error;
 981                 }
 982
 983                 power_supply_powers(&wacom->ac, &wacom->hdev->dev);
 984         }
 985
 986         return 0;
 987 }
 988
 989 static void wacom_destroy_battery(struct wacom *wacom)
 990 {
 991         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
 992              wacom->battery.dev) {
 993                 power_supply_unregister(&wacom->battery);
 994                 wacom->battery.dev = NULL;
 995                 power_supply_unregister(&wacom->ac);
 996                 wacom->ac.dev = NULL;
 997         }
 998 }
 999
1000 static ssize_t wacom_show_speed(struct device *dev,
1001                                 struct device_attribute
1002                                 *attr, char *buf)
1003 {
1004         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1005         struct wacom *wacom = hid_get_drvdata(hdev);
1006
1007         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1008 }
1009
1010 static ssize_t wacom_store_speed(struct device *dev,
1011                                 struct device_attribute *attr,
1012                                 const char *buf, size_t count)
1013 {
1014         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1015         struct wacom *wacom = hid_get_drvdata(hdev);
1016         u8 new_speed;
1017
1018         if (kstrtou8(buf, 0, &new_speed))
1019                 return -EINVAL;
1020
1021         if (new_speed != 0 && new_speed != 1)
1022                 return -EINVAL;
1023
1024         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1025
1026         return count;
1027 }
1028
1029 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1030                 wacom_show_speed, wacom_store_speed);
1031
1032 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1033 {
1034         struct input_dev *input_dev;
1035         struct hid_device *hdev = wacom->hdev;
1036         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1037
1038         input_dev = input_allocate_device();
1039         if (!input_dev)
1040                 return NULL;
1041
1042         input_dev->name = wacom_wac->name;
1043         input_dev->phys = hdev->phys;
1044         input_dev->dev.parent = &hdev->dev;
1045         input_dev->open = wacom_open;
1046         input_dev->close = wacom_close;
1047         input_dev->uniq = hdev->uniq;
1048         input_dev->id.bustype = hdev->bus;
1049         input_dev->id.vendor  = hdev->vendor;
1050         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1051         input_dev->id.version = hdev->version;
1052         input_set_drvdata(input_dev, wacom);
1053
1054         return input_dev;
1055 }
1056
1057 static void wacom_unregister_inputs(struct wacom *wacom)
1058 {
1059         if (wacom->wacom_wac.input)
1060                 input_unregister_device(wacom->wacom_wac.input);
1061         if (wacom->wacom_wac.pad_input)
1062                 input_unregister_device(wacom->wacom_wac.pad_input);
1063         wacom->wacom_wac.input = NULL;
1064         wacom->wacom_wac.pad_input = NULL;
1065         wacom_destroy_leds(wacom);
1066 }
1067
1068 static int wacom_register_inputs(struct wacom *wacom)
1069 {
1070         struct input_dev *input_dev, *pad_input_dev;
1071         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1072         int error;
1073
1074         input_dev = wacom_allocate_input(wacom);
1075         pad_input_dev = wacom_allocate_input(wacom);
1076         if (!input_dev || !pad_input_dev) {
1077                 error = -ENOMEM;
1078                 goto fail_allocate_input;
1079         }
1080
1081         wacom_wac->input = input_dev;
1082         wacom_wac->pad_input = pad_input_dev;
1083         wacom_wac->pad_input->name = wacom_wac->pad_name;
1084
1085         error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1086         if (error)
1087                 goto fail_input_cap;
1088
1089         error = input_register_device(input_dev);
1090         if (error)
1091                 goto fail_register_input;
1092
1093         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1094         if (error) {
1095                 /* no pad in use on this interface */
1096                 input_free_device(pad_input_dev);
1097                 wacom_wac->pad_input = NULL;
1098                 pad_input_dev = NULL;
1099         } else {
1100                 error = input_register_device(pad_input_dev);
1101                 if (error)
1102                         goto fail_register_pad_input;
1103
1104                 error = wacom_initialize_leds(wacom);
1105                 if (error)
1106                         goto fail_leds;
1107         }
1108
1109         return 0;
1110
1111 fail_leds:
1112         input_unregister_device(pad_input_dev);
1113         pad_input_dev = NULL;
1114 fail_register_pad_input:
1115         input_unregister_device(input_dev);
1116         input_dev = NULL;
1117 fail_register_input:
1118 fail_input_cap:
1119         wacom_wac->input = NULL;
1120         wacom_wac->pad_input = NULL;
1121 fail_allocate_input:
1122         if (input_dev)
1123                 input_free_device(input_dev);
1124         if (pad_input_dev)
1125                 input_free_device(pad_input_dev);
1126         return error;
1127 }
1128
1129 static void wacom_wireless_work(struct work_struct *work)
1130 {
1131         struct wacom *wacom = container_of(work, struct wacom, work);
1132         struct usb_device *usbdev = wacom->usbdev;
1133         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1134         struct hid_device *hdev1, *hdev2;
1135         struct wacom *wacom1, *wacom2;
1136         struct wacom_wac *wacom_wac1, *wacom_wac2;
1137         int error;
1138
1139         /*
1140          * Regardless if this is a disconnect or a new tablet,
1141          * remove any existing input and battery devices.
1142          */
1143
1144         wacom_destroy_battery(wacom);
1145
1146         /* Stylus interface */
1147         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
1148         wacom1 = hid_get_drvdata(hdev1);
1149         wacom_wac1 = &(wacom1->wacom_wac);
1150         wacom_unregister_inputs(wacom1);
1151
1152         /* Touch interface */
1153         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
1154         wacom2 = hid_get_drvdata(hdev2);
1155         wacom_wac2 = &(wacom2->wacom_wac);
1156         wacom_unregister_inputs(wacom2);
1157
1158         if (wacom_wac->pid == 0) {
1159                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
1160                 wacom_wac1->shared->type = 0;
1161         } else {
1162                 const struct hid_device_id *id = wacom_ids;
1163
1164                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
1165                          wacom_wac->pid);
1166
1167                 while (id->bus) {
1168                         if (id->vendor == USB_VENDOR_ID_WACOM &&
1169                             id->product == wacom_wac->pid)
1170                                 break;
1171                         id++;
1172                 }
1173
1174                 if (!id->bus) {
1175                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
1176                         return;
1177                 }
1178
1179                 /* Stylus interface */
1180                 wacom_wac1->features =
1181                         *((struct wacom_features *)id->driver_data);
1182                 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1183                 snprintf(wacom_wac1->name, WACOM_NAME_MAX, "%s (WL) Pen",
1184                          wacom_wac1->features.name);
1185                 snprintf(wacom_wac1->pad_name, WACOM_NAME_MAX, "%s (WL) Pad",
1186                          wacom_wac1->features.name);
1187                 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1188                 wacom_wac1->shared->type = wacom_wac1->features.type;
1189                 wacom_wac1->pid = wacom_wac->pid;
1190                 error = wacom_register_inputs(wacom1);
1191                 if (error)
1192                         goto fail;
1193
1194                 /* Touch interface */
1195                 if (wacom_wac1->features.touch_max ||
1196                     wacom_wac1->features.type == INTUOSHT) {
1197                         wacom_wac2->features =
1198                                 *((struct wacom_features *)id->driver_data);
1199                         wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1200                         wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1201                         wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1202                         if (wacom_wac2->features.touch_max)
1203                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1204                                          "%s (WL) Finger",wacom_wac2->features.name);
1205                         else
1206                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1207                                          "%s (WL) Pad",wacom_wac2->features.name);
1208                         snprintf(wacom_wac2->pad_name, WACOM_NAME_MAX,
1209                                  "%s (WL) Pad", wacom_wac2->features.name);
1210                         wacom_wac2->pid = wacom_wac->pid;
1211                         error = wacom_register_inputs(wacom2);
1212                         if (error)
1213                                 goto fail;
1214
1215                         if (wacom_wac1->features.type == INTUOSHT &&
1216                             wacom_wac1->features.touch_max)
1217                                 wacom_wac->shared->touch_input = wacom_wac2->input;
1218                 }
1219
1220                 error = wacom_initialize_battery(wacom);
1221                 if (error)
1222                         goto fail;
1223         }
1224
1225         return;
1226
1227 fail:
1228         wacom_unregister_inputs(wacom1);
1229         wacom_unregister_inputs(wacom2);
1230         return;
1231 }
1232
1233 /*
1234  * Not all devices report physical dimensions from HID.
1235  * Compute the default from hardcoded logical dimension
1236  * and resolution before driver overwrites them.
1237  */
1238 static void wacom_set_default_phy(struct wacom_features *features)
1239 {
1240         if (features->x_resolution) {
1241                 features->x_phy = (features->x_max * 100) /
1242                                         features->x_resolution;
1243                 features->y_phy = (features->y_max * 100) /
1244                                         features->y_resolution;
1245         }
1246 }
1247
1248 static void wacom_calculate_res(struct wacom_features *features)
1249 {
1250         features->x_resolution = wacom_calc_hid_res(features->x_max,
1251                                                     features->x_phy,
1252                                                     features->unit,
1253                                                     features->unitExpo);
1254         features->y_resolution = wacom_calc_hid_res(features->y_max,
1255                                                     features->y_phy,
1256                                                     features->unit,
1257                                                     features->unitExpo);
1258 }
1259
1260 static int wacom_hid_report_len(struct hid_report *report)
1261 {
1262         /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
1263         return ((report->size - 1) >> 3) + 1 + (report->id > 0);
1264 }
1265
1266 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1267 {
1268         struct hid_report_enum *report_enum;
1269         struct hid_report *report;
1270         size_t size = 0;
1271
1272         report_enum = hdev->report_enum + HID_INPUT_REPORT;
1273
1274         list_for_each_entry(report, &report_enum->report_list, list) {
1275                 size_t report_size = wacom_hid_report_len(report);
1276                 if (report_size > size)
1277                         size = report_size;
1278         }
1279
1280         return size;
1281 }
1282
1283 static int wacom_probe(struct hid_device *hdev,
1284                 const struct hid_device_id *id)
1285 {
1286         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
1287         struct usb_device *dev = interface_to_usbdev(intf);
1288         struct wacom *wacom;
1289         struct wacom_wac *wacom_wac;
1290         struct wacom_features *features;
1291         int error;
1292
1293         if (!id->driver_data)
1294                 return -EINVAL;
1295
1296         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1297
1298         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1299         if (!wacom)
1300                 return -ENOMEM;
1301
1302         hid_set_drvdata(hdev, wacom);
1303         wacom->hdev = hdev;
1304
1305         /* ask for the report descriptor to be loaded by HID */
1306         error = hid_parse(hdev);
1307         if (error) {
1308                 hid_err(hdev, "parse failed\n");
1309                 goto fail_parse;
1310         }
1311
1312         wacom_wac = &wacom->wacom_wac;
1313         wacom_wac->features = *((struct wacom_features *)id->driver_data);
1314         features = &wacom_wac->features;
1315         features->pktlen = wacom_compute_pktlen(hdev);
1316         if (features->pktlen > WACOM_PKGLEN_MAX) {
1317                 error = -EINVAL;
1318                 goto fail_pktlen;
1319         }
1320
1321         if (features->check_for_hid_type && features->hid_type != hdev->type) {
1322                 error = -ENODEV;
1323                 goto fail_type;
1324         }
1325
1326         wacom->usbdev = dev;
1327         wacom->intf = intf;
1328         mutex_init(&wacom->lock);
1329         INIT_WORK(&wacom->work, wacom_wireless_work);
1330
1331         /* set the default size in case we do not get them from hid */
1332         wacom_set_default_phy(features);
1333
1334         /* Retrieve the physical and logical size for touch devices */
1335         wacom_retrieve_hid_descriptor(hdev, features);
1336
1337         /*
1338          * Intuos5 has no useful data about its touch interface in its
1339          * HID descriptor. If this is the touch interface (PacketSize
1340          * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1341          */
1342         if (features->type >= INTUOS5S && features->type <= INTUOSHT) {
1343                 if (features->pktlen == WACOM_PKGLEN_BBTOUCH3) {
1344                         features->device_type = BTN_TOOL_FINGER;
1345
1346                         features->x_max = 4096;
1347                         features->y_max = 4096;
1348                 } else {
1349                         features->device_type = BTN_TOOL_PEN;
1350                 }
1351         }
1352
1353         /*
1354          * Same thing for Bamboo 3rd gen.
1355          */
1356         if ((features->type == BAMBOO_PT) &&
1357             (features->pktlen == WACOM_PKGLEN_BBTOUCH3) &&
1358             (features->device_type == BTN_TOOL_PEN)) {
1359                 features->device_type = BTN_TOOL_FINGER;
1360
1361                 features->x_max = 4096;
1362                 features->y_max = 4096;
1363         }
1364
1365         if (hdev->bus == BUS_BLUETOOTH)
1366                 features->quirks |= WACOM_QUIRK_BATTERY;
1367
1368         wacom_setup_device_quirks(features);
1369
1370         /* set unit to "100th of a mm" for devices not reported by HID */
1371         if (!features->unit) {
1372                 features->unit = 0x11;
1373                 features->unitExpo = -3;
1374         }
1375         wacom_calculate_res(features);
1376
1377         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1378         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1379                 "%s Pad", features->name);
1380
1381         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1382                 /* Append the device type to the name */
1383                 if (features->device_type != BTN_TOOL_FINGER)
1384                         strlcat(wacom_wac->name, " Pen", WACOM_NAME_MAX);
1385                 else if (features->touch_max)
1386                         strlcat(wacom_wac->name, " Finger", WACOM_NAME_MAX);
1387                 else
1388                         strlcat(wacom_wac->name, " Pad", WACOM_NAME_MAX);
1389
1390                 error = wacom_add_shared_data(hdev);
1391                 if (error)
1392                         goto fail_shared_data;
1393         }
1394
1395         if (!(features->quirks & WACOM_QUIRK_MONITOR) &&
1396              (features->quirks & WACOM_QUIRK_BATTERY)) {
1397                 error = wacom_initialize_battery(wacom);
1398                 if (error)
1399                         goto fail_battery;
1400         }
1401
1402         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1403                 error = wacom_register_inputs(wacom);
1404                 if (error)
1405                         goto fail_register_inputs;
1406         }
1407
1408         if (hdev->bus == BUS_BLUETOOTH) {
1409                 error = device_create_file(&hdev->dev, &dev_attr_speed);
1410                 if (error)
1411                         hid_warn(hdev,
1412                                  "can't create sysfs speed attribute err: %d\n",
1413                                  error);
1414         }
1415
1416         /* Note that if query fails it is not a hard failure */
1417         wacom_query_tablet_data(hdev, features);
1418
1419         /* Regular HID work starts now */
1420         error = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
1421         if (error) {
1422                 hid_err(hdev, "hw start failed\n");
1423                 goto fail_hw_start;
1424         }
1425
1426         if (features->quirks & WACOM_QUIRK_MONITOR)
1427                 error = hid_hw_open(hdev);
1428
1429         if (wacom_wac->features.type == INTUOSHT && wacom_wac->features.touch_max) {
1430                 if (wacom_wac->features.device_type == BTN_TOOL_FINGER)
1431                         wacom_wac->shared->touch_input = wacom_wac->input;
1432         }
1433
1434         return 0;
1435
1436 fail_hw_start:
1437         wacom_unregister_inputs(wacom);
1438         if (hdev->bus == BUS_BLUETOOTH)
1439                 device_remove_file(&hdev->dev, &dev_attr_speed);
1440 fail_register_inputs:
1441         wacom_unregister_inputs(wacom);
1442         wacom_destroy_battery(wacom);
1443 fail_battery:
1444         wacom_remove_shared_data(wacom_wac);
1445 fail_shared_data:
1446 fail_type:
1447 fail_pktlen:
1448 fail_parse:
1449         kfree(wacom);
1450         hid_set_drvdata(hdev, NULL);
1451         return error;
1452 }
1453
1454 static void wacom_remove(struct hid_device *hdev)
1455 {
1456         struct wacom *wacom = hid_get_drvdata(hdev);
1457
1458         hid_hw_stop(hdev);
1459
1460         cancel_work_sync(&wacom->work);
1461         wacom_unregister_inputs(wacom);
1462         if (hdev->bus == BUS_BLUETOOTH)
1463                 device_remove_file(&hdev->dev, &dev_attr_speed);
1464         wacom_destroy_battery(wacom);
1465         wacom_remove_shared_data(&wacom->wacom_wac);
1466
1467         hid_set_drvdata(hdev, NULL);
1468         kfree(wacom);
1469 }
1470
1471 #ifdef CONFIG_PM
1472 static int wacom_resume(struct hid_device *hdev)
1473 {
1474         struct wacom *wacom = hid_get_drvdata(hdev);
1475         struct wacom_features *features = &wacom->wacom_wac.features;
1476
1477         mutex_lock(&wacom->lock);
1478
1479         /* switch to wacom mode first */
1480         wacom_query_tablet_data(hdev, features);
1481         wacom_led_control(wacom);
1482
1483         mutex_unlock(&wacom->lock);
1484
1485         return 0;
1486 }
1487
1488 static int wacom_reset_resume(struct hid_device *hdev)
1489 {
1490         return wacom_resume(hdev);
1491 }
1492 #endif /* CONFIG_PM */
1493
1494 static struct hid_driver wacom_driver = {
1495         .name =         "wacom",
1496         .id_table =     wacom_ids,
1497         .probe =        wacom_probe,
1498         .remove =       wacom_remove,
1499 #ifdef CONFIG_PM
1500         .resume =       wacom_resume,
1501         .reset_resume = wacom_reset_resume,
1502 #endif
1503         .raw_event =    wacom_raw_event,
1504 };
1505 module_hid_driver(wacom_driver);
1506
1507 MODULE_VERSION(DRIVER_VERSION);
1508 MODULE_AUTHOR(DRIVER_AUTHOR);
1509 MODULE_DESCRIPTION(DRIVER_DESC);
1510 MODULE_LICENSE(DRIVER_LICENSE);