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/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
  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
  75         return hid_hw_open(wacom->hdev);
  76 }
  77
  78 static void wacom_close(struct input_dev *dev)
  79 {
  80         struct wacom *wacom = input_get_drvdata(dev);
  81
  82         hid_hw_close(wacom->hdev);
  83 }
  84
  85 /*
  86  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
  87  */
  88 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
  89                                unsigned unit, int exponent)
  90 {
  91         struct hid_field field = {
  92                 .logical_maximum = logical_extents,
  93                 .physical_maximum = physical_extents,
  94                 .unit = unit,
  95                 .unit_exponent = exponent,
  96         };
  97
  98         return hidinput_calc_abs_res(&field, ABS_X);
  99 }
 100
 101 static void wacom_feature_mapping(struct hid_device *hdev,
 102                 struct hid_field *field, struct hid_usage *usage)
 103 {
 104         struct wacom *wacom = hid_get_drvdata(hdev);
 105         struct wacom_features *features = &wacom->wacom_wac.features;
 106         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 107         u8 *data;
 108         int ret;
 109
 110         switch (usage->hid) {
 111         case HID_DG_CONTACTMAX:
 112                 /* leave touch_max as is if predefined */
 113                 if (!features->touch_max) {
 114                         /* read manually */
 115                         data = kzalloc(2, GFP_KERNEL);
 116                         if (!data)
 117                                 break;
 118                         data[0] = field->report->id;
 119                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 120                                                 data, 2, 0);
 121                         if (ret == 2)
 122                                 features->touch_max = data[1];
 123                         kfree(data);
 124                 }
 125                 break;
 126         case HID_DG_INPUTMODE:
 127                 /* Ignore if value index is out of bounds. */
 128                 if (usage->usage_index >= field->report_count) {
 129                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 130                         break;
 131                 }
 132
 133                 hid_data->inputmode = field->report->id;
 134                 hid_data->inputmode_index = usage->usage_index;
 135                 break;
 136         }
 137 }
 138
 139 /*
 140  * Interface Descriptor of wacom devices can be incomplete and
 141  * inconsistent so wacom_features table is used to store stylus
 142  * device's packet lengths, various maximum values, and tablet
 143  * resolution based on product ID's.
 144  *
 145  * For devices that contain 2 interfaces, wacom_features table is
 146  * inaccurate for the touch interface.  Since the Interface Descriptor
 147  * for touch interfaces has pretty complete data, this function exists
 148  * to query tablet for this missing information instead of hard coding in
 149  * an additional table.
 150  *
 151  * A typical Interface Descriptor for a stylus will contain a
 152  * boot mouse application collection that is not of interest and this
 153  * function will ignore it.
 154  *
 155  * It also contains a digitizer application collection that also is not
 156  * of interest since any information it contains would be duplicate
 157  * of what is in wacom_features. Usually it defines a report of an array
 158  * of bytes that could be used as max length of the stylus packet returned.
 159  * If it happens to define a Digitizer-Stylus Physical Collection then
 160  * the X and Y logical values contain valid data but it is ignored.
 161  *
 162  * A typical Interface Descriptor for a touch interface will contain a
 163  * Digitizer-Finger Physical Collection which will define both logical
 164  * X/Y maximum as well as the physical size of tablet. Since touch
 165  * interfaces haven't supported pressure or distance, this is enough
 166  * information to override invalid values in the wacom_features table.
 167  *
 168  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 169  * data. We deal with them after returning from this function.
 170  */
 171 static void wacom_usage_mapping(struct hid_device *hdev,
 172                 struct hid_field *field, struct hid_usage *usage)
 173 {
 174         struct wacom *wacom = hid_get_drvdata(hdev);
 175         struct wacom_features *features = &wacom->wacom_wac.features;
 176         bool finger = (field->logical == HID_DG_FINGER) ||
 177                       (field->physical == HID_DG_FINGER);
 178         bool pen = (field->logical == HID_DG_STYLUS) ||
 179                    (field->physical == HID_DG_STYLUS);
 180
 181         /*
 182         * Requiring Stylus Usage will ignore boot mouse
 183         * X/Y values and some cases of invalid Digitizer X/Y
 184         * values commonly reported.
 185         */
 186         if (!pen && !finger)
 187                 return;
 188
 189         /*
 190          * Bamboo models do not support HID_DG_CONTACTMAX.
 191          * And, Bamboo Pen only descriptor contains touch.
 192          */
 193         if (features->type != BAMBOO_PT) {
 194                 /* ISDv4 touch devices at least supports one touch point */
 195                 if (finger && !features->touch_max)
 196                         features->touch_max = 1;
 197         }
 198
 199         switch (usage->hid) {
 200         case HID_GD_X:
 201                 features->x_max = field->logical_maximum;
 202                 if (finger) {
 203                         features->device_type = BTN_TOOL_FINGER;
 204                         features->x_phy = field->physical_maximum;
 205                         if (features->type != BAMBOO_PT) {
 206                                 features->unit = field->unit;
 207                                 features->unitExpo = field->unit_exponent;
 208                         }
 209                 } else {
 210                         features->device_type = BTN_TOOL_PEN;
 211                 }
 212                 break;
 213         case HID_GD_Y:
 214                 features->y_max = field->logical_maximum;
 215                 if (finger) {
 216                         features->y_phy = field->physical_maximum;
 217                         if (features->type != BAMBOO_PT) {
 218                                 features->unit = field->unit;
 219                                 features->unitExpo = field->unit_exponent;
 220                         }
 221                 }
 222                 break;
 223         case HID_DG_TIPPRESSURE:
 224                 if (pen)
 225                         features->pressure_max = field->logical_maximum;
 226                 break;
 227         }
 228
 229         if (features->type == HID_GENERIC)
 230                 wacom_wac_usage_mapping(hdev, field, usage);
 231 }
 232
 233 static void wacom_post_parse_hid(struct hid_device *hdev,
 234                                  struct wacom_features *features)
 235 {
 236         struct wacom *wacom = hid_get_drvdata(hdev);
 237         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 238
 239         if (features->type == HID_GENERIC) {
 240                 /* Any last-minute generic device setup */
 241                 if (features->touch_max > 1) {
 242                         input_mt_init_slots(wacom_wac->input, wacom_wac->features.touch_max,
 243                                     INPUT_MT_DIRECT);
 244                 }
 245         }
 246 }
 247
 248 static void wacom_parse_hid(struct hid_device *hdev,
 249                            struct wacom_features *features)
 250 {
 251         struct hid_report_enum *rep_enum;
 252         struct hid_report *hreport;
 253         int i, j;
 254
 255         /* check features first */
 256         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 257         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 258                 for (i = 0; i < hreport->maxfield; i++) {
 259                         /* Ignore if report count is out of bounds. */
 260                         if (hreport->field[i]->report_count < 1)
 261                                 continue;
 262
 263                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 264                                 wacom_feature_mapping(hdev, hreport->field[i],
 265                                                 hreport->field[i]->usage + j);
 266                         }
 267                 }
 268         }
 269
 270         /* now check the input usages */
 271         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 272         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 273
 274                 if (!hreport->maxfield)
 275                         continue;
 276
 277                 for (i = 0; i < hreport->maxfield; i++)
 278                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 279                                 wacom_usage_mapping(hdev, hreport->field[i],
 280                                                 hreport->field[i]->usage + j);
 281         }
 282
 283         wacom_post_parse_hid(hdev, features);
 284 }
 285
 286 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 287 {
 288         struct wacom *wacom = hid_get_drvdata(hdev);
 289         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 290         struct hid_report *r;
 291         struct hid_report_enum *re;
 292
 293         if (hid_data->inputmode < 0)
 294                 return 0;
 295
 296         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 297         r = re->report_id_hash[hid_data->inputmode];
 298         if (r) {
 299                 r->field[0]->value[hid_data->inputmode_index] = 2;
 300                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 301         }
 302         return 0;
 303 }
 304
 305 static int wacom_set_device_mode(struct hid_device *hdev, int report_id,
 306                 int length, int mode)
 307 {
 308         unsigned char *rep_data;
 309         int error = -ENOMEM, limit = 0;
 310
 311         rep_data = kzalloc(length, GFP_KERNEL);
 312         if (!rep_data)
 313                 return error;
 314
 315         do {
 316                 rep_data[0] = report_id;
 317                 rep_data[1] = mode;
 318
 319                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 320                                          length, 1);
 321                 if (error >= 0)
 322                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 323                                                  rep_data, length, 1);
 324         } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
 325
 326         kfree(rep_data);
 327
 328         return error < 0 ? error : 0;
 329 }
 330
 331 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 332                 struct wacom_features *features)
 333 {
 334         struct wacom *wacom = hid_get_drvdata(hdev);
 335         int ret;
 336         u8 rep_data[2];
 337
 338         switch (features->type) {
 339         case GRAPHIRE_BT:
 340                 rep_data[0] = 0x03;
 341                 rep_data[1] = 0x00;
 342                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 343                                         3);
 344
 345                 if (ret >= 0) {
 346                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 347                         rep_data[1] = 0x00;
 348
 349                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 350                                                 rep_data, 2, 3);
 351
 352                         if (ret >= 0) {
 353                                 wacom->wacom_wac.bt_high_speed = speed;
 354                                 return 0;
 355                         }
 356                 }
 357
 358                 /*
 359                  * Note that if the raw queries fail, it's not a hard failure
 360                  * and it is safe to continue
 361                  */
 362                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 363                          rep_data[0], ret);
 364                 break;
 365         case INTUOS4WL:
 366                 if (speed == 1)
 367                         wacom->wacom_wac.bt_features &= ~0x20;
 368                 else
 369                         wacom->wacom_wac.bt_features |= 0x20;
 370
 371                 rep_data[0] = 0x03;
 372                 rep_data[1] = wacom->wacom_wac.bt_features;
 373
 374                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 375                                         1);
 376                 if (ret >= 0)
 377                         wacom->wacom_wac.bt_high_speed = speed;
 378                 break;
 379         }
 380
 381         return 0;
 382 }
 383
 384 /*
 385  * Switch the tablet into its most-capable mode. Wacom tablets are
 386  * typically configured to power-up in a mode which sends mouse-like
 387  * reports to the OS. To get absolute position, pressure data, etc.
 388  * from the tablet, it is necessary to switch the tablet out of this
 389  * mode and into one which sends the full range of tablet data.
 390  */
 391 static int wacom_query_tablet_data(struct hid_device *hdev,
 392                 struct wacom_features *features)
 393 {
 394         if (hdev->bus == BUS_BLUETOOTH)
 395                 return wacom_bt_query_tablet_data(hdev, 1, features);
 396
 397         if (features->type == HID_GENERIC)
 398                 return wacom_hid_set_device_mode(hdev);
 399
 400         if (features->device_type == BTN_TOOL_FINGER) {
 401                 if (features->type > TABLETPC) {
 402                         /* MT Tablet PC touch */
 403                         return wacom_set_device_mode(hdev, 3, 4, 4);
 404                 }
 405                 else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
 406                         return wacom_set_device_mode(hdev, 18, 3, 2);
 407                 }
 408         } else if (features->device_type == BTN_TOOL_PEN) {
 409                 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
 410                         return wacom_set_device_mode(hdev, 2, 2, 2);
 411                 }
 412         }
 413
 414         return 0;
 415 }
 416
 417 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 418                                          struct wacom_features *features)
 419 {
 420         struct wacom *wacom = hid_get_drvdata(hdev);
 421         struct usb_interface *intf = wacom->intf;
 422
 423         /* default features */
 424         features->device_type = BTN_TOOL_PEN;
 425         features->x_fuzz = 4;
 426         features->y_fuzz = 4;
 427         features->pressure_fuzz = 0;
 428         features->distance_fuzz = 0;
 429
 430         /*
 431          * The wireless device HID is basic and layout conflicts with
 432          * other tablets (monitor and touch interface can look like pen).
 433          * Skip the query for this type and modify defaults based on
 434          * interface number.
 435          */
 436         if (features->type == WIRELESS) {
 437                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
 438                         features->device_type = 0;
 439                 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
 440                         features->device_type = BTN_TOOL_FINGER;
 441                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
 442                 }
 443         }
 444
 445         /* only devices that support touch need to retrieve the info */
 446         if (features->type < BAMBOO_PT)
 447                 return;
 448
 449         wacom_parse_hid(hdev, features);
 450 }
 451
 452 struct wacom_hdev_data {
 453         struct list_head list;
 454         struct kref kref;
 455         struct hid_device *dev;
 456         struct wacom_shared shared;
 457 };
 458
 459 static LIST_HEAD(wacom_udev_list);
 460 static DEFINE_MUTEX(wacom_udev_list_lock);
 461
 462 static bool wacom_are_sibling(struct hid_device *hdev,
 463                 struct hid_device *sibling)
 464 {
 465         struct wacom *wacom = hid_get_drvdata(hdev);
 466         struct wacom_features *features = &wacom->wacom_wac.features;
 467         int vid = features->oVid;
 468         int pid = features->oPid;
 469         int n1,n2;
 470
 471         if (vid == 0 && pid == 0) {
 472                 vid = hdev->vendor;
 473                 pid = hdev->product;
 474         }
 475
 476         if (vid != sibling->vendor || pid != sibling->product)
 477                 return false;
 478
 479         /* Compare the physical path. */
 480         n1 = strrchr(hdev->phys, '.') - hdev->phys;
 481         n2 = strrchr(sibling->phys, '.') - sibling->phys;
 482         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 483                 return false;
 484
 485         return !strncmp(hdev->phys, sibling->phys, n1);
 486 }
 487
 488 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 489 {
 490         struct wacom_hdev_data *data;
 491
 492         list_for_each_entry(data, &wacom_udev_list, list) {
 493                 if (wacom_are_sibling(hdev, data->dev)) {
 494                         kref_get(&data->kref);
 495                         return data;
 496                 }
 497         }
 498
 499         return NULL;
 500 }
 501
 502 static int wacom_add_shared_data(struct hid_device *hdev)
 503 {
 504         struct wacom *wacom = hid_get_drvdata(hdev);
 505         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 506         struct wacom_hdev_data *data;
 507         int retval = 0;
 508
 509         mutex_lock(&wacom_udev_list_lock);
 510
 511         data = wacom_get_hdev_data(hdev);
 512         if (!data) {
 513                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 514                 if (!data) {
 515                         retval = -ENOMEM;
 516                         goto out;
 517                 }
 518
 519                 kref_init(&data->kref);
 520                 data->dev = hdev;
 521                 list_add_tail(&data->list, &wacom_udev_list);
 522         }
 523
 524         wacom_wac->shared = &data->shared;
 525
 526 out:
 527         mutex_unlock(&wacom_udev_list_lock);
 528         return retval;
 529 }
 530
 531 static void wacom_release_shared_data(struct kref *kref)
 532 {
 533         struct wacom_hdev_data *data =
 534                 container_of(kref, struct wacom_hdev_data, kref);
 535
 536         mutex_lock(&wacom_udev_list_lock);
 537         list_del(&data->list);
 538         mutex_unlock(&wacom_udev_list_lock);
 539
 540         kfree(data);
 541 }
 542
 543 static void wacom_remove_shared_data(struct wacom_wac *wacom)
 544 {
 545         struct wacom_hdev_data *data;
 546
 547         if (wacom->shared) {
 548                 data = container_of(wacom->shared, struct wacom_hdev_data, shared);
 549                 kref_put(&data->kref, wacom_release_shared_data);
 550                 wacom->shared = NULL;
 551         }
 552 }
 553
 554 static int wacom_led_control(struct wacom *wacom)
 555 {
 556         unsigned char *buf;
 557         int retval;
 558         unsigned char report_id = WAC_CMD_LED_CONTROL;
 559         int buf_size = 9;
 560
 561         if (wacom->wacom_wac.pid) { /* wireless connected */
 562                 report_id = WAC_CMD_WL_LED_CONTROL;
 563                 buf_size = 13;
 564         }
 565         buf = kzalloc(buf_size, GFP_KERNEL);
 566         if (!buf)
 567                 return -ENOMEM;
 568
 569         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 570             wacom->wacom_wac.features.type <= INTUOSPL) {
 571                 /*
 572                  * Touch Ring and crop mark LED luminance may take on
 573                  * one of four values:
 574                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 575                  */
 576                 int ring_led = wacom->led.select[0] & 0x03;
 577                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 578                 int crop_lum = 0;
 579                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 580
 581                 buf[0] = report_id;
 582                 if (wacom->wacom_wac.pid) {
 583                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 584                                          buf, buf_size, WAC_CMD_RETRIES);
 585                         buf[0] = report_id;
 586                         buf[4] = led_bits;
 587                 } else
 588                         buf[1] = led_bits;
 589         }
 590         else {
 591                 int led = wacom->led.select[0] | 0x4;
 592
 593                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 594                     wacom->wacom_wac.features.type == WACOM_24HD)
 595                         led |= (wacom->led.select[1] << 4) | 0x40;
 596
 597                 buf[0] = report_id;
 598                 buf[1] = led;
 599                 buf[2] = wacom->led.llv;
 600                 buf[3] = wacom->led.hlv;
 601                 buf[4] = wacom->led.img_lum;
 602         }
 603
 604         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 605                                   WAC_CMD_RETRIES);
 606         kfree(buf);
 607
 608         return retval;
 609 }
 610
 611 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 612                 const unsigned len, const void *img)
 613 {
 614         unsigned char *buf;
 615         int i, retval;
 616         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 617
 618         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 619         if (!buf)
 620                 return -ENOMEM;
 621
 622         /* Send 'start' command */
 623         buf[0] = WAC_CMD_ICON_START;
 624         buf[1] = 1;
 625         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 626                                   WAC_CMD_RETRIES);
 627         if (retval < 0)
 628                 goto out;
 629
 630         buf[0] = xfer_id;
 631         buf[1] = button_id & 0x07;
 632         for (i = 0; i < 4; i++) {
 633                 buf[2] = i;
 634                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 635
 636                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 637                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 638                 if (retval < 0)
 639                         break;
 640         }
 641
 642         /* Send 'stop' */
 643         buf[0] = WAC_CMD_ICON_START;
 644         buf[1] = 0;
 645         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 646                          WAC_CMD_RETRIES);
 647
 648 out:
 649         kfree(buf);
 650         return retval;
 651 }
 652
 653 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 654                                       const char *buf, size_t count)
 655 {
 656         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 657         struct wacom *wacom = hid_get_drvdata(hdev);
 658         unsigned int id;
 659         int err;
 660
 661         err = kstrtouint(buf, 10, &id);
 662         if (err)
 663                 return err;
 664
 665         mutex_lock(&wacom->lock);
 666
 667         wacom->led.select[set_id] = id & 0x3;
 668         err = wacom_led_control(wacom);
 669
 670         mutex_unlock(&wacom->lock);
 671
 672         return err < 0 ? err : count;
 673 }
 674
 675 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 676 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 677         struct device_attribute *attr, const char *buf, size_t count)   \
 678 {                                                                       \
 679         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 680 }                                                                       \
 681 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 682         struct device_attribute *attr, char *buf)                       \
 683 {                                                                       \
 684         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 685         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 686         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 687                          wacom->led.select[SET_ID]);                    \
 688 }                                                                       \
 689 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 690                     wacom_led##SET_ID##_select_show,                    \
 691                     wacom_led##SET_ID##_select_store)
 692
 693 DEVICE_LED_SELECT_ATTR(0);
 694 DEVICE_LED_SELECT_ATTR(1);
 695
 696 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 697                                      const char *buf, size_t count)
 698 {
 699         unsigned int value;
 700         int err;
 701
 702         err = kstrtouint(buf, 10, &value);
 703         if (err)
 704                 return err;
 705
 706         mutex_lock(&wacom->lock);
 707
 708         *dest = value & 0x7f;
 709         err = wacom_led_control(wacom);
 710
 711         mutex_unlock(&wacom->lock);
 712
 713         return err < 0 ? err : count;
 714 }
 715
 716 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 717 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 718         struct device_attribute *attr, const char *buf, size_t count)   \
 719 {                                                                       \
 720         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 721         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 722                                                                         \
 723         return wacom_luminance_store(wacom, &wacom->led.field,          \
 724                                      buf, count);                       \
 725 }                                                                       \
 726 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 727         struct device_attribute *attr, char *buf)                       \
 728 {                                                                       \
 729         struct wacom *wacom = dev_get_drvdata(dev);                     \
 730         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 731 }                                                                       \
 732 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 733                    wacom_##name##_luminance_show,                       \
 734                    wacom_##name##_luminance_store)
 735
 736 DEVICE_LUMINANCE_ATTR(status0, llv);
 737 DEVICE_LUMINANCE_ATTR(status1, hlv);
 738 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 739
 740 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 741                                         const char *buf, size_t count)
 742 {
 743         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 744         struct wacom *wacom = hid_get_drvdata(hdev);
 745         int err;
 746         unsigned len;
 747         u8 xfer_id;
 748
 749         if (hdev->bus == BUS_BLUETOOTH) {
 750                 len = 256;
 751                 xfer_id = WAC_CMD_ICON_BT_XFER;
 752         } else {
 753                 len = 1024;
 754                 xfer_id = WAC_CMD_ICON_XFER;
 755         }
 756
 757         if (count != len)
 758                 return -EINVAL;
 759
 760         mutex_lock(&wacom->lock);
 761
 762         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
 763
 764         mutex_unlock(&wacom->lock);
 765
 766         return err < 0 ? err : count;
 767 }
 768
 769 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 770 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 771         struct device_attribute *attr, const char *buf, size_t count)   \
 772 {                                                                       \
 773         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 774 }                                                                       \
 775 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
 776                    NULL, wacom_btnimg##BUTTON_ID##_store)
 777
 778 DEVICE_BTNIMG_ATTR(0);
 779 DEVICE_BTNIMG_ATTR(1);
 780 DEVICE_BTNIMG_ATTR(2);
 781 DEVICE_BTNIMG_ATTR(3);
 782 DEVICE_BTNIMG_ATTR(4);
 783 DEVICE_BTNIMG_ATTR(5);
 784 DEVICE_BTNIMG_ATTR(6);
 785 DEVICE_BTNIMG_ATTR(7);
 786
 787 static struct attribute *cintiq_led_attrs[] = {
 788         &dev_attr_status_led0_select.attr,
 789         &dev_attr_status_led1_select.attr,
 790         NULL
 791 };
 792
 793 static struct attribute_group cintiq_led_attr_group = {
 794         .name = "wacom_led",
 795         .attrs = cintiq_led_attrs,
 796 };
 797
 798 static struct attribute *intuos4_led_attrs[] = {
 799         &dev_attr_status0_luminance.attr,
 800         &dev_attr_status1_luminance.attr,
 801         &dev_attr_status_led0_select.attr,
 802         &dev_attr_buttons_luminance.attr,
 803         &dev_attr_button0_rawimg.attr,
 804         &dev_attr_button1_rawimg.attr,
 805         &dev_attr_button2_rawimg.attr,
 806         &dev_attr_button3_rawimg.attr,
 807         &dev_attr_button4_rawimg.attr,
 808         &dev_attr_button5_rawimg.attr,
 809         &dev_attr_button6_rawimg.attr,
 810         &dev_attr_button7_rawimg.attr,
 811         NULL
 812 };
 813
 814 static struct attribute_group intuos4_led_attr_group = {
 815         .name = "wacom_led",
 816         .attrs = intuos4_led_attrs,
 817 };
 818
 819 static struct attribute *intuos5_led_attrs[] = {
 820         &dev_attr_status0_luminance.attr,
 821         &dev_attr_status_led0_select.attr,
 822         NULL
 823 };
 824
 825 static struct attribute_group intuos5_led_attr_group = {
 826         .name = "wacom_led",
 827         .attrs = intuos5_led_attrs,
 828 };
 829
 830 static int wacom_initialize_leds(struct wacom *wacom)
 831 {
 832         int error;
 833
 834         /* Initialize default values */
 835         switch (wacom->wacom_wac.features.type) {
 836         case INTUOS4S:
 837         case INTUOS4:
 838         case INTUOS4WL:
 839         case INTUOS4L:
 840                 wacom->led.select[0] = 0;
 841                 wacom->led.select[1] = 0;
 842                 wacom->led.llv = 10;
 843                 wacom->led.hlv = 20;
 844                 wacom->led.img_lum = 10;
 845                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 846                                            &intuos4_led_attr_group);
 847                 break;
 848
 849         case WACOM_24HD:
 850         case WACOM_21UX2:
 851                 wacom->led.select[0] = 0;
 852                 wacom->led.select[1] = 0;
 853                 wacom->led.llv = 0;
 854                 wacom->led.hlv = 0;
 855                 wacom->led.img_lum = 0;
 856
 857                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 858                                            &cintiq_led_attr_group);
 859                 break;
 860
 861         case INTUOS5S:
 862         case INTUOS5:
 863         case INTUOS5L:
 864         case INTUOSPS:
 865         case INTUOSPM:
 866         case INTUOSPL:
 867                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) {
 868                         wacom->led.select[0] = 0;
 869                         wacom->led.select[1] = 0;
 870                         wacom->led.llv = 32;
 871                         wacom->led.hlv = 0;
 872                         wacom->led.img_lum = 0;
 873
 874                         error = sysfs_create_group(&wacom->hdev->dev.kobj,
 875                                                   &intuos5_led_attr_group);
 876                 } else
 877                         return 0;
 878                 break;
 879
 880         default:
 881                 return 0;
 882         }
 883
 884         if (error) {
 885                 hid_err(wacom->hdev,
 886                         "cannot create sysfs group err: %d\n", error);
 887                 return error;
 888         }
 889         wacom_led_control(wacom);
 890         wacom->led_initialized = true;
 891
 892         return 0;
 893 }
 894
 895 static void wacom_destroy_leds(struct wacom *wacom)
 896 {
 897         if (!wacom->led_initialized)
 898                 return;
 899
 900         wacom->led_initialized = false;
 901
 902         switch (wacom->wacom_wac.features.type) {
 903         case INTUOS4S:
 904         case INTUOS4:
 905         case INTUOS4WL:
 906         case INTUOS4L:
 907                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 908                                    &intuos4_led_attr_group);
 909                 break;
 910
 911         case WACOM_24HD:
 912         case WACOM_21UX2:
 913                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 914                                    &cintiq_led_attr_group);
 915                 break;
 916
 917         case INTUOS5S:
 918         case INTUOS5:
 919         case INTUOS5L:
 920         case INTUOSPS:
 921         case INTUOSPM:
 922         case INTUOSPL:
 923                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN)
 924                         sysfs_remove_group(&wacom->hdev->dev.kobj,
 925                                            &intuos5_led_attr_group);
 926                 break;
 927         }
 928 }
 929
 930 static enum power_supply_property wacom_battery_props[] = {
 931         POWER_SUPPLY_PROP_STATUS,
 932         POWER_SUPPLY_PROP_SCOPE,
 933         POWER_SUPPLY_PROP_CAPACITY
 934 };
 935
 936 static enum power_supply_property wacom_ac_props[] = {
 937         POWER_SUPPLY_PROP_PRESENT,
 938         POWER_SUPPLY_PROP_ONLINE,
 939         POWER_SUPPLY_PROP_SCOPE,
 940 };
 941
 942 static int wacom_battery_get_property(struct power_supply *psy,
 943                                       enum power_supply_property psp,
 944                                       union power_supply_propval *val)
 945 {
 946         struct wacom *wacom = container_of(psy, struct wacom, battery);
 947         int ret = 0;
 948
 949         switch (psp) {
 950                 case POWER_SUPPLY_PROP_SCOPE:
 951                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 952                         break;
 953                 case POWER_SUPPLY_PROP_CAPACITY:
 954                         val->intval =
 955                                 wacom->wacom_wac.battery_capacity;
 956                         break;
 957                 case POWER_SUPPLY_PROP_STATUS:
 958                         if (wacom->wacom_wac.bat_charging)
 959                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 960                         else if (wacom->wacom_wac.battery_capacity == 100 &&
 961                                     wacom->wacom_wac.ps_connected)
 962                                 val->intval = POWER_SUPPLY_STATUS_FULL;
 963                         else
 964                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 965                         break;
 966                 default:
 967                         ret = -EINVAL;
 968                         break;
 969         }
 970
 971         return ret;
 972 }
 973
 974 static int wacom_ac_get_property(struct power_supply *psy,
 975                                 enum power_supply_property psp,
 976                                 union power_supply_propval *val)
 977 {
 978         struct wacom *wacom = container_of(psy, struct wacom, ac);
 979         int ret = 0;
 980
 981         switch (psp) {
 982         case POWER_SUPPLY_PROP_PRESENT:
 983                 /* fall through */
 984         case POWER_SUPPLY_PROP_ONLINE:
 985                 val->intval = wacom->wacom_wac.ps_connected;
 986                 break;
 987         case POWER_SUPPLY_PROP_SCOPE:
 988                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 989                 break;
 990         default:
 991                 ret = -EINVAL;
 992                 break;
 993         }
 994         return ret;
 995 }
 996
 997 static int wacom_initialize_battery(struct wacom *wacom)
 998 {
 999         static atomic_t battery_no = ATOMIC_INIT(0);
1000         int error;
1001         unsigned long n;
1002
1003         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {
1004                 n = atomic_inc_return(&battery_no) - 1;
1005
1006                 wacom->battery.properties = wacom_battery_props;
1007                 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
1008                 wacom->battery.get_property = wacom_battery_get_property;
1009                 sprintf(wacom->wacom_wac.bat_name, "wacom_battery_%ld", n);
1010                 wacom->battery.name = wacom->wacom_wac.bat_name;
1011                 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1012                 wacom->battery.use_for_apm = 0;
1013
1014                 wacom->ac.properties = wacom_ac_props;
1015                 wacom->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
1016                 wacom->ac.get_property = wacom_ac_get_property;
1017                 sprintf(wacom->wacom_wac.ac_name, "wacom_ac_%ld", n);
1018                 wacom->ac.name = wacom->wacom_wac.ac_name;
1019                 wacom->ac.type = POWER_SUPPLY_TYPE_MAINS;
1020                 wacom->ac.use_for_apm = 0;
1021
1022                 error = power_supply_register(&wacom->hdev->dev,
1023                                               &wacom->battery);
1024                 if (error)
1025                         return error;
1026
1027                 power_supply_powers(&wacom->battery, &wacom->hdev->dev);
1028
1029                 error = power_supply_register(&wacom->hdev->dev, &wacom->ac);
1030                 if (error) {
1031                         power_supply_unregister(&wacom->battery);
1032                         return error;
1033                 }
1034
1035                 power_supply_powers(&wacom->ac, &wacom->hdev->dev);
1036         }
1037
1038         return 0;
1039 }
1040
1041 static void wacom_destroy_battery(struct wacom *wacom)
1042 {
1043         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1044              wacom->battery.dev) {
1045                 power_supply_unregister(&wacom->battery);
1046                 wacom->battery.dev = NULL;
1047                 power_supply_unregister(&wacom->ac);
1048                 wacom->ac.dev = NULL;
1049         }
1050 }
1051
1052 static ssize_t wacom_show_speed(struct device *dev,
1053                                 struct device_attribute
1054                                 *attr, char *buf)
1055 {
1056         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1057         struct wacom *wacom = hid_get_drvdata(hdev);
1058
1059         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1060 }
1061
1062 static ssize_t wacom_store_speed(struct device *dev,
1063                                 struct device_attribute *attr,
1064                                 const char *buf, size_t count)
1065 {
1066         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1067         struct wacom *wacom = hid_get_drvdata(hdev);
1068         u8 new_speed;
1069
1070         if (kstrtou8(buf, 0, &new_speed))
1071                 return -EINVAL;
1072
1073         if (new_speed != 0 && new_speed != 1)
1074                 return -EINVAL;
1075
1076         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1077
1078         return count;
1079 }
1080
1081 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1082                 wacom_show_speed, wacom_store_speed);
1083
1084 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1085 {
1086         struct input_dev *input_dev;
1087         struct hid_device *hdev = wacom->hdev;
1088         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1089
1090         input_dev = input_allocate_device();
1091         if (!input_dev)
1092                 return NULL;
1093
1094         input_dev->name = wacom_wac->name;
1095         input_dev->phys = hdev->phys;
1096         input_dev->dev.parent = &hdev->dev;
1097         input_dev->open = wacom_open;
1098         input_dev->close = wacom_close;
1099         input_dev->uniq = hdev->uniq;
1100         input_dev->id.bustype = hdev->bus;
1101         input_dev->id.vendor  = hdev->vendor;
1102         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1103         input_dev->id.version = hdev->version;
1104         input_set_drvdata(input_dev, wacom);
1105
1106         return input_dev;
1107 }
1108
1109 static void wacom_free_inputs(struct wacom *wacom)
1110 {
1111         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1112
1113         if (wacom_wac->input)
1114                 input_free_device(wacom_wac->input);
1115         if (wacom_wac->pad_input)
1116                 input_free_device(wacom_wac->pad_input);
1117         wacom_wac->input = NULL;
1118         wacom_wac->pad_input = NULL;
1119 }
1120
1121 static int wacom_allocate_inputs(struct wacom *wacom)
1122 {
1123         struct input_dev *input_dev, *pad_input_dev;
1124         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1125
1126         input_dev = wacom_allocate_input(wacom);
1127         pad_input_dev = wacom_allocate_input(wacom);
1128         if (!input_dev || !pad_input_dev) {
1129                 wacom_free_inputs(wacom);
1130                 return -ENOMEM;
1131         }
1132
1133         wacom_wac->input = input_dev;
1134         wacom_wac->pad_input = pad_input_dev;
1135         wacom_wac->pad_input->name = wacom_wac->pad_name;
1136
1137         return 0;
1138 }
1139
1140 static void wacom_clean_inputs(struct wacom *wacom)
1141 {
1142         if (wacom->wacom_wac.input) {
1143                 if (wacom->wacom_wac.input_registered)
1144                         input_unregister_device(wacom->wacom_wac.input);
1145                 else
1146                         input_free_device(wacom->wacom_wac.input);
1147         }
1148         if (wacom->wacom_wac.pad_input) {
1149                 if (wacom->wacom_wac.pad_registered)
1150                         input_unregister_device(wacom->wacom_wac.pad_input);
1151                 else
1152                         input_free_device(wacom->wacom_wac.pad_input);
1153         }
1154         wacom->wacom_wac.input = NULL;
1155         wacom->wacom_wac.pad_input = NULL;
1156         wacom_destroy_leds(wacom);
1157 }
1158
1159 static int wacom_register_inputs(struct wacom *wacom)
1160 {
1161         struct input_dev *input_dev, *pad_input_dev;
1162         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1163         int error;
1164
1165         input_dev = wacom_wac->input;
1166         pad_input_dev = wacom_wac->pad_input;
1167
1168         if (!input_dev || !pad_input_dev)
1169                 return -EINVAL;
1170
1171         error = wacom_setup_pentouch_input_capabilities(input_dev, wacom_wac);
1172         if (!error) {
1173                 error = input_register_device(input_dev);
1174                 if (error)
1175                         return error;
1176                 wacom_wac->input_registered = true;
1177         }
1178
1179         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1180         if (error) {
1181                 /* no pad in use on this interface */
1182                 input_free_device(pad_input_dev);
1183                 wacom_wac->pad_input = NULL;
1184                 pad_input_dev = NULL;
1185         } else {
1186                 error = input_register_device(pad_input_dev);
1187                 if (error)
1188                         goto fail_register_pad_input;
1189                 wacom_wac->pad_registered = true;
1190
1191                 error = wacom_initialize_leds(wacom);
1192                 if (error)
1193                         goto fail_leds;
1194         }
1195
1196         return 0;
1197
1198 fail_leds:
1199         input_unregister_device(pad_input_dev);
1200         pad_input_dev = NULL;
1201         wacom_wac->pad_registered = false;
1202 fail_register_pad_input:
1203         input_unregister_device(input_dev);
1204         wacom_wac->input = NULL;
1205         wacom_wac->input_registered = false;
1206         return error;
1207 }
1208
1209 static void wacom_wireless_work(struct work_struct *work)
1210 {
1211         struct wacom *wacom = container_of(work, struct wacom, work);
1212         struct usb_device *usbdev = wacom->usbdev;
1213         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1214         struct hid_device *hdev1, *hdev2;
1215         struct wacom *wacom1, *wacom2;
1216         struct wacom_wac *wacom_wac1, *wacom_wac2;
1217         int error;
1218
1219         /*
1220          * Regardless if this is a disconnect or a new tablet,
1221          * remove any existing input and battery devices.
1222          */
1223
1224         wacom_destroy_battery(wacom);
1225
1226         /* Stylus interface */
1227         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
1228         wacom1 = hid_get_drvdata(hdev1);
1229         wacom_wac1 = &(wacom1->wacom_wac);
1230         wacom_clean_inputs(wacom1);
1231
1232         /* Touch interface */
1233         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
1234         wacom2 = hid_get_drvdata(hdev2);
1235         wacom_wac2 = &(wacom2->wacom_wac);
1236         wacom_clean_inputs(wacom2);
1237
1238         if (wacom_wac->pid == 0) {
1239                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
1240                 wacom_wac1->shared->type = 0;
1241         } else {
1242                 const struct hid_device_id *id = wacom_ids;
1243
1244                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
1245                          wacom_wac->pid);
1246
1247                 while (id->bus) {
1248                         if (id->vendor == USB_VENDOR_ID_WACOM &&
1249                             id->product == wacom_wac->pid)
1250                                 break;
1251                         id++;
1252                 }
1253
1254                 if (!id->bus) {
1255                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
1256                         return;
1257                 }
1258
1259                 /* Stylus interface */
1260                 wacom_wac1->features =
1261                         *((struct wacom_features *)id->driver_data);
1262                 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1263                 snprintf(wacom_wac1->name, WACOM_NAME_MAX, "%s (WL) Pen",
1264                          wacom_wac1->features.name);
1265                 snprintf(wacom_wac1->pad_name, WACOM_NAME_MAX, "%s (WL) Pad",
1266                          wacom_wac1->features.name);
1267                 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1268                 wacom_wac1->shared->type = wacom_wac1->features.type;
1269                 wacom_wac1->pid = wacom_wac->pid;
1270                 error = wacom_allocate_inputs(wacom1) ||
1271                         wacom_register_inputs(wacom1);
1272                 if (error)
1273                         goto fail;
1274
1275                 /* Touch interface */
1276                 if (wacom_wac1->features.touch_max ||
1277                     wacom_wac1->features.type == INTUOSHT) {
1278                         wacom_wac2->features =
1279                                 *((struct wacom_features *)id->driver_data);
1280                         wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1281                         wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1282                         wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1283                         if (wacom_wac2->features.touch_max)
1284                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1285                                          "%s (WL) Finger",wacom_wac2->features.name);
1286                         else
1287                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1288                                          "%s (WL) Pad",wacom_wac2->features.name);
1289                         snprintf(wacom_wac2->pad_name, WACOM_NAME_MAX,
1290                                  "%s (WL) Pad", wacom_wac2->features.name);
1291                         wacom_wac2->pid = wacom_wac->pid;
1292                         error = wacom_allocate_inputs(wacom2) ||
1293                                 wacom_register_inputs(wacom2);
1294                         if (error)
1295                                 goto fail;
1296
1297                         if (wacom_wac1->features.type == INTUOSHT &&
1298                             wacom_wac1->features.touch_max)
1299                                 wacom_wac->shared->touch_input = wacom_wac2->input;
1300                 }
1301
1302                 error = wacom_initialize_battery(wacom);
1303                 if (error)
1304                         goto fail;
1305         }
1306
1307         return;
1308
1309 fail:
1310         wacom_clean_inputs(wacom1);
1311         wacom_clean_inputs(wacom2);
1312         return;
1313 }
1314
1315 /*
1316  * Not all devices report physical dimensions from HID.
1317  * Compute the default from hardcoded logical dimension
1318  * and resolution before driver overwrites them.
1319  */
1320 static void wacom_set_default_phy(struct wacom_features *features)
1321 {
1322         if (features->x_resolution) {
1323                 features->x_phy = (features->x_max * 100) /
1324                                         features->x_resolution;
1325                 features->y_phy = (features->y_max * 100) /
1326                                         features->y_resolution;
1327         }
1328 }
1329
1330 static void wacom_calculate_res(struct wacom_features *features)
1331 {
1332         features->x_resolution = wacom_calc_hid_res(features->x_max,
1333                                                     features->x_phy,
1334                                                     features->unit,
1335                                                     features->unitExpo);
1336         features->y_resolution = wacom_calc_hid_res(features->y_max,
1337                                                     features->y_phy,
1338                                                     features->unit,
1339                                                     features->unitExpo);
1340 }
1341
1342 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1343 {
1344         struct hid_report_enum *report_enum;
1345         struct hid_report *report;
1346         size_t size = 0;
1347
1348         report_enum = hdev->report_enum + HID_INPUT_REPORT;
1349
1350         list_for_each_entry(report, &report_enum->report_list, list) {
1351                 size_t report_size = hid_report_len(report);
1352                 if (report_size > size)
1353                         size = report_size;
1354         }
1355
1356         return size;
1357 }
1358
1359 static int wacom_probe(struct hid_device *hdev,
1360                 const struct hid_device_id *id)
1361 {
1362         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
1363         struct usb_device *dev = interface_to_usbdev(intf);
1364         struct wacom *wacom;
1365         struct wacom_wac *wacom_wac;
1366         struct wacom_features *features;
1367         int error;
1368         unsigned int connect_mask = HID_CONNECT_HIDRAW;
1369
1370         if (!id->driver_data)
1371                 return -EINVAL;
1372
1373         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1374
1375         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1376         if (!wacom)
1377                 return -ENOMEM;
1378
1379         hid_set_drvdata(hdev, wacom);
1380         wacom->hdev = hdev;
1381
1382         /* ask for the report descriptor to be loaded by HID */
1383         error = hid_parse(hdev);
1384         if (error) {
1385                 hid_err(hdev, "parse failed\n");
1386                 goto fail_parse;
1387         }
1388
1389         wacom_wac = &wacom->wacom_wac;
1390         wacom_wac->features = *((struct wacom_features *)id->driver_data);
1391         features = &wacom_wac->features;
1392         features->pktlen = wacom_compute_pktlen(hdev);
1393         if (features->pktlen > WACOM_PKGLEN_MAX) {
1394                 error = -EINVAL;
1395                 goto fail_pktlen;
1396         }
1397
1398         if (features->check_for_hid_type && features->hid_type != hdev->type) {
1399                 error = -ENODEV;
1400                 goto fail_type;
1401         }
1402
1403         wacom->usbdev = dev;
1404         wacom->intf = intf;
1405         mutex_init(&wacom->lock);
1406         INIT_WORK(&wacom->work, wacom_wireless_work);
1407
1408         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1409                 error = wacom_allocate_inputs(wacom);
1410                 if (error)
1411                         goto fail_allocate_inputs;
1412         }
1413
1414         /* set the default size in case we do not get them from hid */
1415         wacom_set_default_phy(features);
1416
1417         /* Retrieve the physical and logical size for touch devices */
1418         wacom_retrieve_hid_descriptor(hdev, features);
1419
1420         /*
1421          * Intuos5 has no useful data about its touch interface in its
1422          * HID descriptor. If this is the touch interface (PacketSize
1423          * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1424          */
1425         if (features->type >= INTUOS5S && features->type <= INTUOSHT) {
1426                 if (features->pktlen == WACOM_PKGLEN_BBTOUCH3) {
1427                         features->device_type = BTN_TOOL_FINGER;
1428
1429                         features->x_max = 4096;
1430                         features->y_max = 4096;
1431                 } else {
1432                         features->device_type = BTN_TOOL_PEN;
1433                 }
1434         }
1435
1436         /*
1437          * Same thing for Bamboo 3rd gen.
1438          */
1439         if ((features->type == BAMBOO_PT) &&
1440             (features->pktlen == WACOM_PKGLEN_BBTOUCH3) &&
1441             (features->device_type == BTN_TOOL_PEN)) {
1442                 features->device_type = BTN_TOOL_FINGER;
1443
1444                 features->x_max = 4096;
1445                 features->y_max = 4096;
1446         }
1447
1448         if (hdev->bus == BUS_BLUETOOTH)
1449                 features->quirks |= WACOM_QUIRK_BATTERY;
1450
1451         wacom_setup_device_quirks(features);
1452
1453         /* set unit to "100th of a mm" for devices not reported by HID */
1454         if (!features->unit) {
1455                 features->unit = 0x11;
1456                 features->unitExpo = -3;
1457         }
1458         wacom_calculate_res(features);
1459
1460         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1461         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1462                 "%s Pad", features->name);
1463
1464         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1465                 /* Append the device type to the name */
1466                 if (features->device_type != BTN_TOOL_FINGER)
1467                         strlcat(wacom_wac->name, " Pen", WACOM_NAME_MAX);
1468                 else if (features->touch_max)
1469                         strlcat(wacom_wac->name, " Finger", WACOM_NAME_MAX);
1470                 else
1471                         strlcat(wacom_wac->name, " Pad", WACOM_NAME_MAX);
1472
1473                 error = wacom_add_shared_data(hdev);
1474                 if (error)
1475                         goto fail_shared_data;
1476         }
1477
1478         if (!(features->quirks & WACOM_QUIRK_MONITOR) &&
1479              (features->quirks & WACOM_QUIRK_BATTERY)) {
1480                 error = wacom_initialize_battery(wacom);
1481                 if (error)
1482                         goto fail_battery;
1483         }
1484
1485         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1486                 error = wacom_register_inputs(wacom);
1487                 if (error)
1488                         goto fail_register_inputs;
1489         }
1490
1491         if (hdev->bus == BUS_BLUETOOTH) {
1492                 error = device_create_file(&hdev->dev, &dev_attr_speed);
1493                 if (error)
1494                         hid_warn(hdev,
1495                                  "can't create sysfs speed attribute err: %d\n",
1496                                  error);
1497         }
1498
1499         if (features->type == HID_GENERIC)
1500                 connect_mask |= HID_CONNECT_DRIVER;
1501
1502         /* Regular HID work starts now */
1503         error = hid_hw_start(hdev, connect_mask);
1504         if (error) {
1505                 hid_err(hdev, "hw start failed\n");
1506                 goto fail_hw_start;
1507         }
1508
1509         /* Note that if query fails it is not a hard failure */
1510         wacom_query_tablet_data(hdev, features);
1511
1512         if (features->quirks & WACOM_QUIRK_MONITOR)
1513                 error = hid_hw_open(hdev);
1514
1515         if (wacom_wac->features.type == INTUOSHT && wacom_wac->features.touch_max) {
1516                 if (wacom_wac->features.device_type == BTN_TOOL_FINGER)
1517                         wacom_wac->shared->touch_input = wacom_wac->input;
1518         }
1519
1520         return 0;
1521
1522 fail_hw_start:
1523         if (hdev->bus == BUS_BLUETOOTH)
1524                 device_remove_file(&hdev->dev, &dev_attr_speed);
1525 fail_register_inputs:
1526         wacom_clean_inputs(wacom);
1527         wacom_destroy_battery(wacom);
1528 fail_battery:
1529         wacom_remove_shared_data(wacom_wac);
1530 fail_shared_data:
1531         wacom_clean_inputs(wacom);
1532 fail_allocate_inputs:
1533 fail_type:
1534 fail_pktlen:
1535 fail_parse:
1536         kfree(wacom);
1537         hid_set_drvdata(hdev, NULL);
1538         return error;
1539 }
1540
1541 static void wacom_remove(struct hid_device *hdev)
1542 {
1543         struct wacom *wacom = hid_get_drvdata(hdev);
1544
1545         hid_hw_stop(hdev);
1546
1547         cancel_work_sync(&wacom->work);
1548         wacom_clean_inputs(wacom);
1549         if (hdev->bus == BUS_BLUETOOTH)
1550                 device_remove_file(&hdev->dev, &dev_attr_speed);
1551         wacom_destroy_battery(wacom);
1552         wacom_remove_shared_data(&wacom->wacom_wac);
1553
1554         hid_set_drvdata(hdev, NULL);
1555         kfree(wacom);
1556 }
1557
1558 #ifdef CONFIG_PM
1559 static int wacom_resume(struct hid_device *hdev)
1560 {
1561         struct wacom *wacom = hid_get_drvdata(hdev);
1562         struct wacom_features *features = &wacom->wacom_wac.features;
1563
1564         mutex_lock(&wacom->lock);
1565
1566         /* switch to wacom mode first */
1567         wacom_query_tablet_data(hdev, features);
1568         wacom_led_control(wacom);
1569
1570         mutex_unlock(&wacom->lock);
1571
1572         return 0;
1573 }
1574
1575 static int wacom_reset_resume(struct hid_device *hdev)
1576 {
1577         return wacom_resume(hdev);
1578 }
1579 #endif /* CONFIG_PM */
1580
1581 static struct hid_driver wacom_driver = {
1582         .name =         "wacom",
1583         .id_table =     wacom_ids,
1584         .probe =        wacom_probe,
1585         .remove =       wacom_remove,
1586         .event =        wacom_wac_event,
1587         .report =       wacom_wac_report,
1588 #ifdef CONFIG_PM
1589         .resume =       wacom_resume,
1590         .reset_resume = wacom_reset_resume,
1591 #endif
1592         .raw_event =    wacom_raw_event,
1593 };
1594 module_hid_driver(wacom_driver);
1595
1596 MODULE_VERSION(DRIVER_VERSION);
1597 MODULE_AUTHOR(DRIVER_AUTHOR);
1598 MODULE_DESCRIPTION(DRIVER_DESC);
1599 MODULE_LICENSE(DRIVER_LICENSE);