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 == -EAGAIN) && --retries);
  39
  40         if (retval < 0)
  41                 hid_err(hdev, "wacom_get_report: ran out of retries "
  42                         "(last error = %d)\n", retval);
  43
  44         return retval;
  45 }
  46
  47 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
  48                             size_t size, unsigned int retries)
  49 {
  50         int retval;
  51
  52         do {
  53                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  54                                 HID_REQ_SET_REPORT);
  55         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
  56
  57         if (retval < 0)
  58                 hid_err(hdev, "wacom_set_report: ran out of retries "
  59                         "(last error = %d)\n", retval);
  60
  61         return retval;
  62 }
  63
  64 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
  65                 u8 *raw_data, int size)
  66 {
  67         struct wacom *wacom = hid_get_drvdata(hdev);
  68
  69         if (size > WACOM_PKGLEN_MAX)
  70                 return 1;
  71
  72         memcpy(wacom->wacom_wac.data, raw_data, size);
  73
  74         wacom_wac_irq(&wacom->wacom_wac, size);
  75
  76         return 0;
  77 }
  78
  79 static int wacom_open(struct input_dev *dev)
  80 {
  81         struct wacom *wacom = input_get_drvdata(dev);
  82
  83         return hid_hw_open(wacom->hdev);
  84 }
  85
  86 static void wacom_close(struct input_dev *dev)
  87 {
  88         struct wacom *wacom = input_get_drvdata(dev);
  89
  90         hid_hw_close(wacom->hdev);
  91 }
  92
  93 /*
  94  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
  95  */
  96 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
  97                                unsigned unit, int exponent)
  98 {
  99         struct hid_field field = {
 100                 .logical_maximum = logical_extents,
 101                 .physical_maximum = physical_extents,
 102                 .unit = unit,
 103                 .unit_exponent = exponent,
 104         };
 105
 106         return hidinput_calc_abs_res(&field, ABS_X);
 107 }
 108
 109 static void wacom_feature_mapping(struct hid_device *hdev,
 110                 struct hid_field *field, struct hid_usage *usage)
 111 {
 112         struct wacom *wacom = hid_get_drvdata(hdev);
 113         struct wacom_features *features = &wacom->wacom_wac.features;
 114         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 115         u8 *data;
 116         int ret;
 117
 118         switch (usage->hid) {
 119         case HID_DG_CONTACTMAX:
 120                 /* leave touch_max as is if predefined */
 121                 if (!features->touch_max) {
 122                         /* read manually */
 123                         data = kzalloc(2, GFP_KERNEL);
 124                         if (!data)
 125                                 break;
 126                         data[0] = field->report->id;
 127                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 128                                                 data, 2, WAC_CMD_RETRIES);
 129                         if (ret == 2) {
 130                                 features->touch_max = data[1];
 131                         } else {
 132                                 features->touch_max = 16;
 133                                 hid_warn(hdev, "wacom_feature_mapping: "
 134                                          "could not get HID_DG_CONTACTMAX, "
 135                                          "defaulting to %d\n",
 136                                           features->touch_max);
 137                         }
 138                         kfree(data);
 139                 }
 140                 break;
 141         case HID_DG_INPUTMODE:
 142                 /* Ignore if value index is out of bounds. */
 143                 if (usage->usage_index >= field->report_count) {
 144                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 145                         break;
 146                 }
 147
 148                 hid_data->inputmode = field->report->id;
 149                 hid_data->inputmode_index = usage->usage_index;
 150                 break;
 151         }
 152 }
 153
 154 /*
 155  * Interface Descriptor of wacom devices can be incomplete and
 156  * inconsistent so wacom_features table is used to store stylus
 157  * device's packet lengths, various maximum values, and tablet
 158  * resolution based on product ID's.
 159  *
 160  * For devices that contain 2 interfaces, wacom_features table is
 161  * inaccurate for the touch interface.  Since the Interface Descriptor
 162  * for touch interfaces has pretty complete data, this function exists
 163  * to query tablet for this missing information instead of hard coding in
 164  * an additional table.
 165  *
 166  * A typical Interface Descriptor for a stylus will contain a
 167  * boot mouse application collection that is not of interest and this
 168  * function will ignore it.
 169  *
 170  * It also contains a digitizer application collection that also is not
 171  * of interest since any information it contains would be duplicate
 172  * of what is in wacom_features. Usually it defines a report of an array
 173  * of bytes that could be used as max length of the stylus packet returned.
 174  * If it happens to define a Digitizer-Stylus Physical Collection then
 175  * the X and Y logical values contain valid data but it is ignored.
 176  *
 177  * A typical Interface Descriptor for a touch interface will contain a
 178  * Digitizer-Finger Physical Collection which will define both logical
 179  * X/Y maximum as well as the physical size of tablet. Since touch
 180  * interfaces haven't supported pressure or distance, this is enough
 181  * information to override invalid values in the wacom_features table.
 182  *
 183  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 184  * data. We deal with them after returning from this function.
 185  */
 186 static void wacom_usage_mapping(struct hid_device *hdev,
 187                 struct hid_field *field, struct hid_usage *usage)
 188 {
 189         struct wacom *wacom = hid_get_drvdata(hdev);
 190         struct wacom_features *features = &wacom->wacom_wac.features;
 191         bool finger = WACOM_FINGER_FIELD(field);
 192         bool pen = WACOM_PEN_FIELD(field);
 193
 194         /*
 195         * Requiring Stylus Usage will ignore boot mouse
 196         * X/Y values and some cases of invalid Digitizer X/Y
 197         * values commonly reported.
 198         */
 199         if (pen)
 200                 features->device_type |= WACOM_DEVICETYPE_PEN;
 201         else if (finger)
 202                 features->device_type |= WACOM_DEVICETYPE_TOUCH;
 203         else
 204                 return;
 205
 206         /*
 207          * Bamboo models do not support HID_DG_CONTACTMAX.
 208          * And, Bamboo Pen only descriptor contains touch.
 209          */
 210         if (features->type != BAMBOO_PT) {
 211                 /* ISDv4 touch devices at least supports one touch point */
 212                 if (finger && !features->touch_max)
 213                         features->touch_max = 1;
 214         }
 215
 216         switch (usage->hid) {
 217         case HID_GD_X:
 218                 features->x_max = field->logical_maximum;
 219                 if (finger) {
 220                         features->x_phy = field->physical_maximum;
 221                         if (features->type != BAMBOO_PT) {
 222                                 features->unit = field->unit;
 223                                 features->unitExpo = field->unit_exponent;
 224                         }
 225                 }
 226                 break;
 227         case HID_GD_Y:
 228                 features->y_max = field->logical_maximum;
 229                 if (finger) {
 230                         features->y_phy = field->physical_maximum;
 231                         if (features->type != BAMBOO_PT) {
 232                                 features->unit = field->unit;
 233                                 features->unitExpo = field->unit_exponent;
 234                         }
 235                 }
 236                 break;
 237         case HID_DG_TIPPRESSURE:
 238                 if (pen)
 239                         features->pressure_max = field->logical_maximum;
 240                 break;
 241         }
 242
 243         if (features->type == HID_GENERIC)
 244                 wacom_wac_usage_mapping(hdev, field, usage);
 245 }
 246
 247 static void wacom_post_parse_hid(struct hid_device *hdev,
 248                                  struct wacom_features *features)
 249 {
 250         struct wacom *wacom = hid_get_drvdata(hdev);
 251         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 252
 253         if (features->type == HID_GENERIC) {
 254                 /* Any last-minute generic device setup */
 255                 if (features->touch_max > 1) {
 256                         input_mt_init_slots(wacom_wac->touch_input, wacom_wac->features.touch_max,
 257                                     INPUT_MT_DIRECT);
 258                 }
 259         }
 260 }
 261
 262 static void wacom_parse_hid(struct hid_device *hdev,
 263                            struct wacom_features *features)
 264 {
 265         struct hid_report_enum *rep_enum;
 266         struct hid_report *hreport;
 267         int i, j;
 268
 269         /* check features first */
 270         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 271         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 272                 for (i = 0; i < hreport->maxfield; i++) {
 273                         /* Ignore if report count is out of bounds. */
 274                         if (hreport->field[i]->report_count < 1)
 275                                 continue;
 276
 277                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 278                                 wacom_feature_mapping(hdev, hreport->field[i],
 279                                                 hreport->field[i]->usage + j);
 280                         }
 281                 }
 282         }
 283
 284         /* now check the input usages */
 285         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 286         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 287
 288                 if (!hreport->maxfield)
 289                         continue;
 290
 291                 for (i = 0; i < hreport->maxfield; i++)
 292                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 293                                 wacom_usage_mapping(hdev, hreport->field[i],
 294                                                 hreport->field[i]->usage + j);
 295         }
 296
 297         wacom_post_parse_hid(hdev, features);
 298 }
 299
 300 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 301 {
 302         struct wacom *wacom = hid_get_drvdata(hdev);
 303         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 304         struct hid_report *r;
 305         struct hid_report_enum *re;
 306
 307         if (hid_data->inputmode < 0)
 308                 return 0;
 309
 310         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 311         r = re->report_id_hash[hid_data->inputmode];
 312         if (r) {
 313                 r->field[0]->value[hid_data->inputmode_index] = 2;
 314                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 315         }
 316         return 0;
 317 }
 318
 319 static int wacom_set_device_mode(struct hid_device *hdev, int report_id,
 320                 int length, int mode)
 321 {
 322         unsigned char *rep_data;
 323         int error = -ENOMEM, limit = 0;
 324
 325         rep_data = kzalloc(length, GFP_KERNEL);
 326         if (!rep_data)
 327                 return error;
 328
 329         do {
 330                 rep_data[0] = report_id;
 331                 rep_data[1] = mode;
 332
 333                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 334                                          length, 1);
 335                 if (error >= 0)
 336                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 337                                                  rep_data, length, 1);
 338         } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
 339
 340         kfree(rep_data);
 341
 342         return error < 0 ? error : 0;
 343 }
 344
 345 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 346                 struct wacom_features *features)
 347 {
 348         struct wacom *wacom = hid_get_drvdata(hdev);
 349         int ret;
 350         u8 rep_data[2];
 351
 352         switch (features->type) {
 353         case GRAPHIRE_BT:
 354                 rep_data[0] = 0x03;
 355                 rep_data[1] = 0x00;
 356                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 357                                         3);
 358
 359                 if (ret >= 0) {
 360                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 361                         rep_data[1] = 0x00;
 362
 363                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 364                                                 rep_data, 2, 3);
 365
 366                         if (ret >= 0) {
 367                                 wacom->wacom_wac.bt_high_speed = speed;
 368                                 return 0;
 369                         }
 370                 }
 371
 372                 /*
 373                  * Note that if the raw queries fail, it's not a hard failure
 374                  * and it is safe to continue
 375                  */
 376                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 377                          rep_data[0], ret);
 378                 break;
 379         case INTUOS4WL:
 380                 if (speed == 1)
 381                         wacom->wacom_wac.bt_features &= ~0x20;
 382                 else
 383                         wacom->wacom_wac.bt_features |= 0x20;
 384
 385                 rep_data[0] = 0x03;
 386                 rep_data[1] = wacom->wacom_wac.bt_features;
 387
 388                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 389                                         1);
 390                 if (ret >= 0)
 391                         wacom->wacom_wac.bt_high_speed = speed;
 392                 break;
 393         }
 394
 395         return 0;
 396 }
 397
 398 /*
 399  * Switch the tablet into its most-capable mode. Wacom tablets are
 400  * typically configured to power-up in a mode which sends mouse-like
 401  * reports to the OS. To get absolute position, pressure data, etc.
 402  * from the tablet, it is necessary to switch the tablet out of this
 403  * mode and into one which sends the full range of tablet data.
 404  */
 405 static int wacom_query_tablet_data(struct hid_device *hdev,
 406                 struct wacom_features *features)
 407 {
 408         if (hdev->bus == BUS_BLUETOOTH)
 409                 return wacom_bt_query_tablet_data(hdev, 1, features);
 410
 411         if (features->type == HID_GENERIC)
 412                 return wacom_hid_set_device_mode(hdev);
 413
 414         if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
 415                 if (features->type > TABLETPC) {
 416                         /* MT Tablet PC touch */
 417                         return wacom_set_device_mode(hdev, 3, 4, 4);
 418                 }
 419                 else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
 420                         return wacom_set_device_mode(hdev, 18, 3, 2);
 421                 }
 422                 else if (features->type == WACOM_27QHDT) {
 423                         return wacom_set_device_mode(hdev, 131, 3, 2);
 424                 }
 425                 else if (features->type == BAMBOO_PAD) {
 426                         return wacom_set_device_mode(hdev, 2, 2, 2);
 427                 }
 428         } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
 429                 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
 430                         return wacom_set_device_mode(hdev, 2, 2, 2);
 431                 }
 432         }
 433
 434         return 0;
 435 }
 436
 437 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 438                                          struct wacom_features *features)
 439 {
 440         struct wacom *wacom = hid_get_drvdata(hdev);
 441         struct usb_interface *intf = wacom->intf;
 442
 443         /* default features */
 444         features->x_fuzz = 4;
 445         features->y_fuzz = 4;
 446         features->pressure_fuzz = 0;
 447         features->distance_fuzz = 0;
 448
 449         /*
 450          * The wireless device HID is basic and layout conflicts with
 451          * other tablets (monitor and touch interface can look like pen).
 452          * Skip the query for this type and modify defaults based on
 453          * interface number.
 454          */
 455         if (features->type == WIRELESS) {
 456                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
 457                         features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
 458                 else
 459                         features->device_type = WACOM_DEVICETYPE_NONE;
 460                 return;
 461         }
 462
 463         wacom_parse_hid(hdev, features);
 464 }
 465
 466 struct wacom_hdev_data {
 467         struct list_head list;
 468         struct kref kref;
 469         struct hid_device *dev;
 470         struct wacom_shared shared;
 471 };
 472
 473 static LIST_HEAD(wacom_udev_list);
 474 static DEFINE_MUTEX(wacom_udev_list_lock);
 475
 476 static bool wacom_are_sibling(struct hid_device *hdev,
 477                 struct hid_device *sibling)
 478 {
 479         struct wacom *wacom = hid_get_drvdata(hdev);
 480         struct wacom_features *features = &wacom->wacom_wac.features;
 481         int vid = features->oVid;
 482         int pid = features->oPid;
 483         int n1,n2;
 484
 485         if (vid == 0 && pid == 0) {
 486                 vid = hdev->vendor;
 487                 pid = hdev->product;
 488         }
 489
 490         if (vid != sibling->vendor || pid != sibling->product)
 491                 return false;
 492
 493         /* Compare the physical path. */
 494         n1 = strrchr(hdev->phys, '.') - hdev->phys;
 495         n2 = strrchr(sibling->phys, '.') - sibling->phys;
 496         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 497                 return false;
 498
 499         return !strncmp(hdev->phys, sibling->phys, n1);
 500 }
 501
 502 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 503 {
 504         struct wacom_hdev_data *data;
 505
 506         list_for_each_entry(data, &wacom_udev_list, list) {
 507                 if (wacom_are_sibling(hdev, data->dev)) {
 508                         kref_get(&data->kref);
 509                         return data;
 510                 }
 511         }
 512
 513         return NULL;
 514 }
 515
 516 static int wacom_add_shared_data(struct hid_device *hdev)
 517 {
 518         struct wacom *wacom = hid_get_drvdata(hdev);
 519         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 520         struct wacom_hdev_data *data;
 521         int retval = 0;
 522
 523         mutex_lock(&wacom_udev_list_lock);
 524
 525         data = wacom_get_hdev_data(hdev);
 526         if (!data) {
 527                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 528                 if (!data) {
 529                         retval = -ENOMEM;
 530                         goto out;
 531                 }
 532
 533                 kref_init(&data->kref);
 534                 data->dev = hdev;
 535                 list_add_tail(&data->list, &wacom_udev_list);
 536         }
 537
 538         wacom_wac->shared = &data->shared;
 539
 540         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
 541                 wacom_wac->shared->touch = hdev;
 542         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
 543                 wacom_wac->shared->pen = hdev;
 544
 545 out:
 546         mutex_unlock(&wacom_udev_list_lock);
 547         return retval;
 548 }
 549
 550 static void wacom_release_shared_data(struct kref *kref)
 551 {
 552         struct wacom_hdev_data *data =
 553                 container_of(kref, struct wacom_hdev_data, kref);
 554
 555         mutex_lock(&wacom_udev_list_lock);
 556         list_del(&data->list);
 557         mutex_unlock(&wacom_udev_list_lock);
 558
 559         kfree(data);
 560 }
 561
 562 static void wacom_remove_shared_data(struct wacom *wacom)
 563 {
 564         struct wacom_hdev_data *data;
 565         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 566
 567         if (wacom_wac->shared) {
 568                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
 569                                     shared);
 570
 571                 if (wacom_wac->shared->touch == wacom->hdev)
 572                         wacom_wac->shared->touch = NULL;
 573                 else if (wacom_wac->shared->pen == wacom->hdev)
 574                         wacom_wac->shared->pen = NULL;
 575
 576                 kref_put(&data->kref, wacom_release_shared_data);
 577                 wacom_wac->shared = NULL;
 578         }
 579 }
 580
 581 static int wacom_led_control(struct wacom *wacom)
 582 {
 583         unsigned char *buf;
 584         int retval;
 585         unsigned char report_id = WAC_CMD_LED_CONTROL;
 586         int buf_size = 9;
 587
 588         if (wacom->wacom_wac.pid) { /* wireless connected */
 589                 report_id = WAC_CMD_WL_LED_CONTROL;
 590                 buf_size = 13;
 591         }
 592         buf = kzalloc(buf_size, GFP_KERNEL);
 593         if (!buf)
 594                 return -ENOMEM;
 595
 596         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 597             wacom->wacom_wac.features.type <= INTUOSPL) {
 598                 /*
 599                  * Touch Ring and crop mark LED luminance may take on
 600                  * one of four values:
 601                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 602                  */
 603                 int ring_led = wacom->led.select[0] & 0x03;
 604                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 605                 int crop_lum = 0;
 606                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 607
 608                 buf[0] = report_id;
 609                 if (wacom->wacom_wac.pid) {
 610                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 611                                          buf, buf_size, WAC_CMD_RETRIES);
 612                         buf[0] = report_id;
 613                         buf[4] = led_bits;
 614                 } else
 615                         buf[1] = led_bits;
 616         }
 617         else {
 618                 int led = wacom->led.select[0] | 0x4;
 619
 620                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 621                     wacom->wacom_wac.features.type == WACOM_24HD)
 622                         led |= (wacom->led.select[1] << 4) | 0x40;
 623
 624                 buf[0] = report_id;
 625                 buf[1] = led;
 626                 buf[2] = wacom->led.llv;
 627                 buf[3] = wacom->led.hlv;
 628                 buf[4] = wacom->led.img_lum;
 629         }
 630
 631         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 632                                   WAC_CMD_RETRIES);
 633         kfree(buf);
 634
 635         return retval;
 636 }
 637
 638 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 639                 const unsigned len, const void *img)
 640 {
 641         unsigned char *buf;
 642         int i, retval;
 643         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 644
 645         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 646         if (!buf)
 647                 return -ENOMEM;
 648
 649         /* Send 'start' command */
 650         buf[0] = WAC_CMD_ICON_START;
 651         buf[1] = 1;
 652         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 653                                   WAC_CMD_RETRIES);
 654         if (retval < 0)
 655                 goto out;
 656
 657         buf[0] = xfer_id;
 658         buf[1] = button_id & 0x07;
 659         for (i = 0; i < 4; i++) {
 660                 buf[2] = i;
 661                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 662
 663                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 664                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 665                 if (retval < 0)
 666                         break;
 667         }
 668
 669         /* Send 'stop' */
 670         buf[0] = WAC_CMD_ICON_START;
 671         buf[1] = 0;
 672         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 673                          WAC_CMD_RETRIES);
 674
 675 out:
 676         kfree(buf);
 677         return retval;
 678 }
 679
 680 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 681                                       const char *buf, size_t count)
 682 {
 683         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 684         struct wacom *wacom = hid_get_drvdata(hdev);
 685         unsigned int id;
 686         int err;
 687
 688         err = kstrtouint(buf, 10, &id);
 689         if (err)
 690                 return err;
 691
 692         mutex_lock(&wacom->lock);
 693
 694         wacom->led.select[set_id] = id & 0x3;
 695         err = wacom_led_control(wacom);
 696
 697         mutex_unlock(&wacom->lock);
 698
 699         return err < 0 ? err : count;
 700 }
 701
 702 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 703 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 704         struct device_attribute *attr, const char *buf, size_t count)   \
 705 {                                                                       \
 706         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 707 }                                                                       \
 708 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 709         struct device_attribute *attr, char *buf)                       \
 710 {                                                                       \
 711         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 712         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 713         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 714                          wacom->led.select[SET_ID]);                    \
 715 }                                                                       \
 716 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 717                     wacom_led##SET_ID##_select_show,                    \
 718                     wacom_led##SET_ID##_select_store)
 719
 720 DEVICE_LED_SELECT_ATTR(0);
 721 DEVICE_LED_SELECT_ATTR(1);
 722
 723 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 724                                      const char *buf, size_t count)
 725 {
 726         unsigned int value;
 727         int err;
 728
 729         err = kstrtouint(buf, 10, &value);
 730         if (err)
 731                 return err;
 732
 733         mutex_lock(&wacom->lock);
 734
 735         *dest = value & 0x7f;
 736         err = wacom_led_control(wacom);
 737
 738         mutex_unlock(&wacom->lock);
 739
 740         return err < 0 ? err : count;
 741 }
 742
 743 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 744 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 745         struct device_attribute *attr, const char *buf, size_t count)   \
 746 {                                                                       \
 747         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 748         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 749                                                                         \
 750         return wacom_luminance_store(wacom, &wacom->led.field,          \
 751                                      buf, count);                       \
 752 }                                                                       \
 753 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 754         struct device_attribute *attr, char *buf)                       \
 755 {                                                                       \
 756         struct wacom *wacom = dev_get_drvdata(dev);                     \
 757         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 758 }                                                                       \
 759 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 760                    wacom_##name##_luminance_show,                       \
 761                    wacom_##name##_luminance_store)
 762
 763 DEVICE_LUMINANCE_ATTR(status0, llv);
 764 DEVICE_LUMINANCE_ATTR(status1, hlv);
 765 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 766
 767 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 768                                         const char *buf, size_t count)
 769 {
 770         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 771         struct wacom *wacom = hid_get_drvdata(hdev);
 772         int err;
 773         unsigned len;
 774         u8 xfer_id;
 775
 776         if (hdev->bus == BUS_BLUETOOTH) {
 777                 len = 256;
 778                 xfer_id = WAC_CMD_ICON_BT_XFER;
 779         } else {
 780                 len = 1024;
 781                 xfer_id = WAC_CMD_ICON_XFER;
 782         }
 783
 784         if (count != len)
 785                 return -EINVAL;
 786
 787         mutex_lock(&wacom->lock);
 788
 789         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
 790
 791         mutex_unlock(&wacom->lock);
 792
 793         return err < 0 ? err : count;
 794 }
 795
 796 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 797 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 798         struct device_attribute *attr, const char *buf, size_t count)   \
 799 {                                                                       \
 800         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 801 }                                                                       \
 802 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
 803                    NULL, wacom_btnimg##BUTTON_ID##_store)
 804
 805 DEVICE_BTNIMG_ATTR(0);
 806 DEVICE_BTNIMG_ATTR(1);
 807 DEVICE_BTNIMG_ATTR(2);
 808 DEVICE_BTNIMG_ATTR(3);
 809 DEVICE_BTNIMG_ATTR(4);
 810 DEVICE_BTNIMG_ATTR(5);
 811 DEVICE_BTNIMG_ATTR(6);
 812 DEVICE_BTNIMG_ATTR(7);
 813
 814 static struct attribute *cintiq_led_attrs[] = {
 815         &dev_attr_status_led0_select.attr,
 816         &dev_attr_status_led1_select.attr,
 817         NULL
 818 };
 819
 820 static struct attribute_group cintiq_led_attr_group = {
 821         .name = "wacom_led",
 822         .attrs = cintiq_led_attrs,
 823 };
 824
 825 static struct attribute *intuos4_led_attrs[] = {
 826         &dev_attr_status0_luminance.attr,
 827         &dev_attr_status1_luminance.attr,
 828         &dev_attr_status_led0_select.attr,
 829         &dev_attr_buttons_luminance.attr,
 830         &dev_attr_button0_rawimg.attr,
 831         &dev_attr_button1_rawimg.attr,
 832         &dev_attr_button2_rawimg.attr,
 833         &dev_attr_button3_rawimg.attr,
 834         &dev_attr_button4_rawimg.attr,
 835         &dev_attr_button5_rawimg.attr,
 836         &dev_attr_button6_rawimg.attr,
 837         &dev_attr_button7_rawimg.attr,
 838         NULL
 839 };
 840
 841 static struct attribute_group intuos4_led_attr_group = {
 842         .name = "wacom_led",
 843         .attrs = intuos4_led_attrs,
 844 };
 845
 846 static struct attribute *intuos5_led_attrs[] = {
 847         &dev_attr_status0_luminance.attr,
 848         &dev_attr_status_led0_select.attr,
 849         NULL
 850 };
 851
 852 static struct attribute_group intuos5_led_attr_group = {
 853         .name = "wacom_led",
 854         .attrs = intuos5_led_attrs,
 855 };
 856
 857 static int wacom_initialize_leds(struct wacom *wacom)
 858 {
 859         int error;
 860
 861         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
 862                 return 0;
 863
 864         /* Initialize default values */
 865         switch (wacom->wacom_wac.features.type) {
 866         case INTUOS4S:
 867         case INTUOS4:
 868         case INTUOS4WL:
 869         case INTUOS4L:
 870                 wacom->led.select[0] = 0;
 871                 wacom->led.select[1] = 0;
 872                 wacom->led.llv = 10;
 873                 wacom->led.hlv = 20;
 874                 wacom->led.img_lum = 10;
 875                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 876                                            &intuos4_led_attr_group);
 877                 break;
 878
 879         case WACOM_24HD:
 880         case WACOM_21UX2:
 881                 wacom->led.select[0] = 0;
 882                 wacom->led.select[1] = 0;
 883                 wacom->led.llv = 0;
 884                 wacom->led.hlv = 0;
 885                 wacom->led.img_lum = 0;
 886
 887                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 888                                            &cintiq_led_attr_group);
 889                 break;
 890
 891         case INTUOS5S:
 892         case INTUOS5:
 893         case INTUOS5L:
 894         case INTUOSPS:
 895         case INTUOSPM:
 896         case INTUOSPL:
 897                 wacom->led.select[0] = 0;
 898                 wacom->led.select[1] = 0;
 899                 wacom->led.llv = 32;
 900                 wacom->led.hlv = 0;
 901                 wacom->led.img_lum = 0;
 902
 903                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 904                                           &intuos5_led_attr_group);
 905                 break;
 906
 907         default:
 908                 return 0;
 909         }
 910
 911         if (error) {
 912                 hid_err(wacom->hdev,
 913                         "cannot create sysfs group err: %d\n", error);
 914                 return error;
 915         }
 916         wacom_led_control(wacom);
 917         wacom->led_initialized = true;
 918
 919         return 0;
 920 }
 921
 922 static void wacom_destroy_leds(struct wacom *wacom)
 923 {
 924         if (!wacom->led_initialized)
 925                 return;
 926
 927         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
 928                 return;
 929
 930         wacom->led_initialized = false;
 931
 932         switch (wacom->wacom_wac.features.type) {
 933         case INTUOS4S:
 934         case INTUOS4:
 935         case INTUOS4WL:
 936         case INTUOS4L:
 937                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 938                                    &intuos4_led_attr_group);
 939                 break;
 940
 941         case WACOM_24HD:
 942         case WACOM_21UX2:
 943                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 944                                    &cintiq_led_attr_group);
 945                 break;
 946
 947         case INTUOS5S:
 948         case INTUOS5:
 949         case INTUOS5L:
 950         case INTUOSPS:
 951         case INTUOSPM:
 952         case INTUOSPL:
 953                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 954                                    &intuos5_led_attr_group);
 955                 break;
 956         }
 957 }
 958
 959 static enum power_supply_property wacom_battery_props[] = {
 960         POWER_SUPPLY_PROP_PRESENT,
 961         POWER_SUPPLY_PROP_STATUS,
 962         POWER_SUPPLY_PROP_SCOPE,
 963         POWER_SUPPLY_PROP_CAPACITY
 964 };
 965
 966 static enum power_supply_property wacom_ac_props[] = {
 967         POWER_SUPPLY_PROP_PRESENT,
 968         POWER_SUPPLY_PROP_ONLINE,
 969         POWER_SUPPLY_PROP_SCOPE,
 970 };
 971
 972 static int wacom_battery_get_property(struct power_supply *psy,
 973                                       enum power_supply_property psp,
 974                                       union power_supply_propval *val)
 975 {
 976         struct wacom *wacom = power_supply_get_drvdata(psy);
 977         int ret = 0;
 978
 979         switch (psp) {
 980                 case POWER_SUPPLY_PROP_PRESENT:
 981                         val->intval = wacom->wacom_wac.bat_connected;
 982                         break;
 983                 case POWER_SUPPLY_PROP_SCOPE:
 984                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 985                         break;
 986                 case POWER_SUPPLY_PROP_CAPACITY:
 987                         val->intval =
 988                                 wacom->wacom_wac.battery_capacity;
 989                         break;
 990                 case POWER_SUPPLY_PROP_STATUS:
 991                         if (wacom->wacom_wac.bat_charging)
 992                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 993                         else if (wacom->wacom_wac.battery_capacity == 100 &&
 994                                     wacom->wacom_wac.ps_connected)
 995                                 val->intval = POWER_SUPPLY_STATUS_FULL;
 996                         else if (wacom->wacom_wac.ps_connected)
 997                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 998                         else
 999                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1000                         break;
1001                 default:
1002                         ret = -EINVAL;
1003                         break;
1004         }
1005
1006         return ret;
1007 }
1008
1009 static int wacom_ac_get_property(struct power_supply *psy,
1010                                 enum power_supply_property psp,
1011                                 union power_supply_propval *val)
1012 {
1013         struct wacom *wacom = power_supply_get_drvdata(psy);
1014         int ret = 0;
1015
1016         switch (psp) {
1017         case POWER_SUPPLY_PROP_PRESENT:
1018                 /* fall through */
1019         case POWER_SUPPLY_PROP_ONLINE:
1020                 val->intval = wacom->wacom_wac.ps_connected;
1021                 break;
1022         case POWER_SUPPLY_PROP_SCOPE:
1023                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1024                 break;
1025         default:
1026                 ret = -EINVAL;
1027                 break;
1028         }
1029         return ret;
1030 }
1031
1032 static int wacom_initialize_battery(struct wacom *wacom)
1033 {
1034         static atomic_t battery_no = ATOMIC_INIT(0);
1035         struct power_supply_config psy_cfg = { .drv_data = wacom, };
1036         unsigned long n;
1037
1038         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {
1039                 struct power_supply_desc *bat_desc = &wacom->battery_desc;
1040                 struct power_supply_desc *ac_desc = &wacom->ac_desc;
1041                 n = atomic_inc_return(&battery_no) - 1;
1042
1043                 bat_desc->properties = wacom_battery_props;
1044                 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1045                 bat_desc->get_property = wacom_battery_get_property;
1046                 sprintf(wacom->wacom_wac.bat_name, "wacom_battery_%ld", n);
1047                 bat_desc->name = wacom->wacom_wac.bat_name;
1048                 bat_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1049                 bat_desc->use_for_apm = 0;
1050
1051                 ac_desc->properties = wacom_ac_props;
1052                 ac_desc->num_properties = ARRAY_SIZE(wacom_ac_props);
1053                 ac_desc->get_property = wacom_ac_get_property;
1054                 sprintf(wacom->wacom_wac.ac_name, "wacom_ac_%ld", n);
1055                 ac_desc->name = wacom->wacom_wac.ac_name;
1056                 ac_desc->type = POWER_SUPPLY_TYPE_MAINS;
1057                 ac_desc->use_for_apm = 0;
1058
1059                 wacom->battery = power_supply_register(&wacom->hdev->dev,
1060                                               &wacom->battery_desc, &psy_cfg);
1061                 if (IS_ERR(wacom->battery))
1062                         return PTR_ERR(wacom->battery);
1063
1064                 power_supply_powers(wacom->battery, &wacom->hdev->dev);
1065
1066                 wacom->ac = power_supply_register(&wacom->hdev->dev,
1067                                                   &wacom->ac_desc,
1068                                                   &psy_cfg);
1069                 if (IS_ERR(wacom->ac)) {
1070                         power_supply_unregister(wacom->battery);
1071                         return PTR_ERR(wacom->ac);
1072                 }
1073
1074                 power_supply_powers(wacom->ac, &wacom->hdev->dev);
1075         }
1076
1077         return 0;
1078 }
1079
1080 static void wacom_destroy_battery(struct wacom *wacom)
1081 {
1082         if (wacom->battery) {
1083                 power_supply_unregister(wacom->battery);
1084                 wacom->battery = NULL;
1085                 power_supply_unregister(wacom->ac);
1086                 wacom->ac = NULL;
1087         }
1088 }
1089
1090 static ssize_t wacom_show_speed(struct device *dev,
1091                                 struct device_attribute
1092                                 *attr, char *buf)
1093 {
1094         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1095         struct wacom *wacom = hid_get_drvdata(hdev);
1096
1097         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1098 }
1099
1100 static ssize_t wacom_store_speed(struct device *dev,
1101                                 struct device_attribute *attr,
1102                                 const char *buf, size_t count)
1103 {
1104         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1105         struct wacom *wacom = hid_get_drvdata(hdev);
1106         u8 new_speed;
1107
1108         if (kstrtou8(buf, 0, &new_speed))
1109                 return -EINVAL;
1110
1111         if (new_speed != 0 && new_speed != 1)
1112                 return -EINVAL;
1113
1114         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1115
1116         return count;
1117 }
1118
1119 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1120                 wacom_show_speed, wacom_store_speed);
1121
1122 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1123 {
1124         struct input_dev *input_dev;
1125         struct hid_device *hdev = wacom->hdev;
1126         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1127
1128         input_dev = input_allocate_device();
1129         if (!input_dev)
1130                 return NULL;
1131
1132         input_dev->name = wacom_wac->features.name;
1133         input_dev->phys = hdev->phys;
1134         input_dev->dev.parent = &hdev->dev;
1135         input_dev->open = wacom_open;
1136         input_dev->close = wacom_close;
1137         input_dev->uniq = hdev->uniq;
1138         input_dev->id.bustype = hdev->bus;
1139         input_dev->id.vendor  = hdev->vendor;
1140         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1141         input_dev->id.version = hdev->version;
1142         input_set_drvdata(input_dev, wacom);
1143
1144         return input_dev;
1145 }
1146
1147 static void wacom_clean_inputs(struct wacom *wacom)
1148 {
1149         if (wacom->wacom_wac.pen_input) {
1150                 if (wacom->wacom_wac.pen_registered)
1151                         input_unregister_device(wacom->wacom_wac.pen_input);
1152                 else
1153                         input_free_device(wacom->wacom_wac.pen_input);
1154         }
1155         if (wacom->wacom_wac.touch_input) {
1156                 if (wacom->wacom_wac.touch_registered)
1157                         input_unregister_device(wacom->wacom_wac.touch_input);
1158                 else
1159                         input_free_device(wacom->wacom_wac.touch_input);
1160         }
1161         if (wacom->wacom_wac.pad_input) {
1162                 if (wacom->wacom_wac.pad_registered)
1163                         input_unregister_device(wacom->wacom_wac.pad_input);
1164                 else
1165                         input_free_device(wacom->wacom_wac.pad_input);
1166         }
1167         wacom->wacom_wac.pen_input = NULL;
1168         wacom->wacom_wac.touch_input = NULL;
1169         wacom->wacom_wac.pad_input = NULL;
1170         wacom_destroy_leds(wacom);
1171 }
1172
1173 static int wacom_allocate_inputs(struct wacom *wacom)
1174 {
1175         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1176
1177         wacom_wac->pen_input = wacom_allocate_input(wacom);
1178         wacom_wac->touch_input = wacom_allocate_input(wacom);
1179         wacom_wac->pad_input = wacom_allocate_input(wacom);
1180         if (!wacom_wac->pen_input || !wacom_wac->touch_input || !wacom_wac->pad_input) {
1181                 wacom_clean_inputs(wacom);
1182                 return -ENOMEM;
1183         }
1184
1185         wacom_wac->pen_input->name = wacom_wac->pen_name;
1186         wacom_wac->touch_input->name = wacom_wac->touch_name;
1187         wacom_wac->pad_input->name = wacom_wac->pad_name;
1188
1189         return 0;
1190 }
1191
1192 static int wacom_register_inputs(struct wacom *wacom)
1193 {
1194         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1195         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1196         int error = 0;
1197
1198         pen_input_dev = wacom_wac->pen_input;
1199         touch_input_dev = wacom_wac->touch_input;
1200         pad_input_dev = wacom_wac->pad_input;
1201
1202         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1203                 return -EINVAL;
1204
1205         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1206         if (error) {
1207                 /* no pen in use on this interface */
1208                 input_free_device(pen_input_dev);
1209                 wacom_wac->pen_input = NULL;
1210                 pen_input_dev = NULL;
1211         } else {
1212                 error = input_register_device(pen_input_dev);
1213                 if (error)
1214                         goto fail_register_pen_input;
1215                 wacom_wac->pen_registered = true;
1216         }
1217
1218         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1219         if (error) {
1220                 /* no touch in use on this interface */
1221                 input_free_device(touch_input_dev);
1222                 wacom_wac->touch_input = NULL;
1223                 touch_input_dev = NULL;
1224         } else {
1225                 error = input_register_device(touch_input_dev);
1226                 if (error)
1227                         goto fail_register_touch_input;
1228                 wacom_wac->touch_registered = true;
1229         }
1230
1231         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1232         if (error) {
1233                 /* no pad in use on this interface */
1234                 input_free_device(pad_input_dev);
1235                 wacom_wac->pad_input = NULL;
1236                 pad_input_dev = NULL;
1237         } else {
1238                 error = input_register_device(pad_input_dev);
1239                 if (error)
1240                         goto fail_register_pad_input;
1241                 wacom_wac->pad_registered = true;
1242
1243                 error = wacom_initialize_leds(wacom);
1244                 if (error)
1245                         goto fail_leds;
1246         }
1247
1248         return 0;
1249
1250 fail_leds:
1251         input_unregister_device(pad_input_dev);
1252         pad_input_dev = NULL;
1253         wacom_wac->pad_registered = false;
1254 fail_register_pad_input:
1255         input_unregister_device(touch_input_dev);
1256         wacom_wac->touch_input = NULL;
1257         wacom_wac->touch_registered = false;
1258 fail_register_touch_input:
1259         input_unregister_device(pen_input_dev);
1260         wacom_wac->pen_input = NULL;
1261         wacom_wac->pen_registered = false;
1262 fail_register_pen_input:
1263         return error;
1264 }
1265
1266 static void wacom_wireless_work(struct work_struct *work)
1267 {
1268         struct wacom *wacom = container_of(work, struct wacom, work);
1269         struct usb_device *usbdev = wacom->usbdev;
1270         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1271         struct hid_device *hdev1, *hdev2;
1272         struct wacom *wacom1, *wacom2;
1273         struct wacom_wac *wacom_wac1, *wacom_wac2;
1274         int error;
1275
1276         /*
1277          * Regardless if this is a disconnect or a new tablet,
1278          * remove any existing input and battery devices.
1279          */
1280
1281         wacom_destroy_battery(wacom);
1282
1283         /* Stylus interface */
1284         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
1285         wacom1 = hid_get_drvdata(hdev1);
1286         wacom_wac1 = &(wacom1->wacom_wac);
1287         wacom_clean_inputs(wacom1);
1288
1289         /* Touch interface */
1290         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
1291         wacom2 = hid_get_drvdata(hdev2);
1292         wacom_wac2 = &(wacom2->wacom_wac);
1293         wacom_clean_inputs(wacom2);
1294
1295         if (wacom_wac->pid == 0) {
1296                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
1297                 wacom_wac1->shared->type = 0;
1298         } else {
1299                 const struct hid_device_id *id = wacom_ids;
1300
1301                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
1302                          wacom_wac->pid);
1303
1304                 while (id->bus) {
1305                         if (id->vendor == USB_VENDOR_ID_WACOM &&
1306                             id->product == wacom_wac->pid)
1307                                 break;
1308                         id++;
1309                 }
1310
1311                 if (!id->bus) {
1312                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
1313                         return;
1314                 }
1315
1316                 /* Stylus interface */
1317                 wacom_wac1->features =
1318                         *((struct wacom_features *)id->driver_data);
1319                 wacom_wac1->features.device_type |= WACOM_DEVICETYPE_PEN;
1320                 if (wacom_wac1->features.type != INTUOSHT &&
1321                     wacom_wac1->features.type != BAMBOO_PT)
1322                         wacom_wac1->features.device_type |= WACOM_DEVICETYPE_PAD;
1323                 snprintf(wacom_wac1->pen_name, WACOM_NAME_MAX, "%s (WL) Pen",
1324                          wacom_wac1->features.name);
1325                 snprintf(wacom_wac1->pad_name, WACOM_NAME_MAX, "%s (WL) Pad",
1326                          wacom_wac1->features.name);
1327                 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1328                 wacom_wac1->shared->type = wacom_wac1->features.type;
1329                 wacom_wac1->pid = wacom_wac->pid;
1330                 error = wacom_allocate_inputs(wacom1) ||
1331                         wacom_register_inputs(wacom1);
1332                 if (error)
1333                         goto fail;
1334
1335                 /* Touch interface */
1336                 if (wacom_wac1->features.touch_max ||
1337                     wacom_wac1->features.type == INTUOSHT) {
1338                         wacom_wac2->features =
1339                                 *((struct wacom_features *)id->driver_data);
1340                         wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1341                         wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1342                         snprintf(wacom_wac2->touch_name, WACOM_NAME_MAX,
1343                                  "%s (WL) Finger",wacom_wac2->features.name);
1344                         snprintf(wacom_wac2->pad_name, WACOM_NAME_MAX,
1345                                  "%s (WL) Pad",wacom_wac2->features.name);
1346                         if (wacom_wac1->features.touch_max)
1347                                 wacom_wac2->features.device_type |= WACOM_DEVICETYPE_TOUCH;
1348                         if (wacom_wac1->features.type == INTUOSHT ||
1349                             wacom_wac1->features.type == BAMBOO_PT)
1350                                 wacom_wac2->features.device_type |= WACOM_DEVICETYPE_PAD;
1351                         wacom_wac2->pid = wacom_wac->pid;
1352                         error = wacom_allocate_inputs(wacom2) ||
1353                                 wacom_register_inputs(wacom2);
1354                         if (error)
1355                                 goto fail;
1356
1357                         if (wacom_wac1->features.type == INTUOSHT &&
1358                             wacom_wac1->features.touch_max)
1359                                 wacom_wac->shared->touch_input = wacom_wac2->touch_input;
1360                 }
1361
1362                 error = wacom_initialize_battery(wacom);
1363                 if (error)
1364                         goto fail;
1365         }
1366
1367         return;
1368
1369 fail:
1370         wacom_clean_inputs(wacom1);
1371         wacom_clean_inputs(wacom2);
1372         return;
1373 }
1374
1375 void wacom_battery_work(struct work_struct *work)
1376 {
1377         struct wacom *wacom = container_of(work, struct wacom, work);
1378
1379         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1380              !wacom->battery) {
1381                 wacom_initialize_battery(wacom);
1382         }
1383         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1384                  wacom->battery) {
1385                 wacom_destroy_battery(wacom);
1386         }
1387 }
1388
1389 /*
1390  * Not all devices report physical dimensions from HID.
1391  * Compute the default from hardcoded logical dimension
1392  * and resolution before driver overwrites them.
1393  */
1394 static void wacom_set_default_phy(struct wacom_features *features)
1395 {
1396         if (features->x_resolution) {
1397                 features->x_phy = (features->x_max * 100) /
1398                                         features->x_resolution;
1399                 features->y_phy = (features->y_max * 100) /
1400                                         features->y_resolution;
1401         }
1402 }
1403
1404 static void wacom_calculate_res(struct wacom_features *features)
1405 {
1406         /* set unit to "100th of a mm" for devices not reported by HID */
1407         if (!features->unit) {
1408                 features->unit = 0x11;
1409                 features->unitExpo = -3;
1410         }
1411
1412         features->x_resolution = wacom_calc_hid_res(features->x_max,
1413                                                     features->x_phy,
1414                                                     features->unit,
1415                                                     features->unitExpo);
1416         features->y_resolution = wacom_calc_hid_res(features->y_max,
1417                                                     features->y_phy,
1418                                                     features->unit,
1419                                                     features->unitExpo);
1420 }
1421
1422 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1423 {
1424         struct hid_report_enum *report_enum;
1425         struct hid_report *report;
1426         size_t size = 0;
1427
1428         report_enum = hdev->report_enum + HID_INPUT_REPORT;
1429
1430         list_for_each_entry(report, &report_enum->report_list, list) {
1431                 size_t report_size = hid_report_len(report);
1432                 if (report_size > size)
1433                         size = report_size;
1434         }
1435
1436         return size;
1437 }
1438
1439 static void wacom_update_name(struct wacom *wacom)
1440 {
1441         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1442         struct wacom_features *features = &wacom_wac->features;
1443         char name[WACOM_NAME_MAX];
1444
1445         /* Generic devices name unspecified */
1446         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
1447                 if (strstr(wacom->hdev->name, "Wacom") ||
1448                     strstr(wacom->hdev->name, "wacom") ||
1449                     strstr(wacom->hdev->name, "WACOM")) {
1450                         /* name is in HID descriptor, use it */
1451                         strlcpy(name, wacom->hdev->name, sizeof(name));
1452
1453                         /* strip out excess whitespaces */
1454                         while (1) {
1455                                 char *gap = strstr(name, "  ");
1456                                 if (gap == NULL)
1457                                         break;
1458                                 /* shift everything including the terminator */
1459                                 memmove(gap, gap+1, strlen(gap));
1460                         }
1461                         /* get rid of trailing whitespace */
1462                         if (name[strlen(name)-1] == ' ')
1463                                 name[strlen(name)-1] = '\0';
1464                 } else {
1465                         /* no meaningful name retrieved. use product ID */
1466                         snprintf(name, sizeof(name),
1467                                  "%s %X", features->name, wacom->hdev->product);
1468                 }
1469         } else {
1470                 strlcpy(name, features->name, sizeof(name));
1471         }
1472
1473         /* Append the device type to the name */
1474         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
1475                 "%s Pen", name);
1476         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
1477                 "%s Finger", name);
1478         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1479                 "%s Pad", name);
1480 }
1481
1482 static int wacom_probe(struct hid_device *hdev,
1483                 const struct hid_device_id *id)
1484 {
1485         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
1486         struct usb_device *dev = interface_to_usbdev(intf);
1487         struct wacom *wacom;
1488         struct wacom_wac *wacom_wac;
1489         struct wacom_features *features;
1490         int error;
1491         unsigned int connect_mask = HID_CONNECT_HIDRAW;
1492
1493         if (!id->driver_data)
1494                 return -EINVAL;
1495
1496         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1497
1498         /* hid-core sets this quirk for the boot interface */
1499         hdev->quirks &= ~HID_QUIRK_NOGET;
1500
1501         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1502         if (!wacom)
1503                 return -ENOMEM;
1504
1505         hid_set_drvdata(hdev, wacom);
1506         wacom->hdev = hdev;
1507
1508         /* ask for the report descriptor to be loaded by HID */
1509         error = hid_parse(hdev);
1510         if (error) {
1511                 hid_err(hdev, "parse failed\n");
1512                 goto fail_parse;
1513         }
1514
1515         wacom_wac = &wacom->wacom_wac;
1516         wacom_wac->features = *((struct wacom_features *)id->driver_data);
1517         features = &wacom_wac->features;
1518         features->pktlen = wacom_compute_pktlen(hdev);
1519         if (features->pktlen > WACOM_PKGLEN_MAX) {
1520                 error = -EINVAL;
1521                 goto fail_pktlen;
1522         }
1523
1524         if (features->check_for_hid_type && features->hid_type != hdev->type) {
1525                 error = -ENODEV;
1526                 goto fail_type;
1527         }
1528
1529         wacom->usbdev = dev;
1530         wacom->intf = intf;
1531         mutex_init(&wacom->lock);
1532         INIT_WORK(&wacom->work, wacom_wireless_work);
1533
1534         error = wacom_allocate_inputs(wacom);
1535         if (error)
1536                 goto fail_allocate_inputs;
1537
1538         /*
1539          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
1540          * into debug mode for the touch part.
1541          * We ignore the other interfaces.
1542          */
1543         if (features->type == BAMBOO_PAD) {
1544                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
1545                         features->type = HID_GENERIC;
1546                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
1547                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
1548                         error = -ENODEV;
1549                         goto fail_shared_data;
1550                 }
1551         }
1552
1553         /* set the default size in case we do not get them from hid */
1554         wacom_set_default_phy(features);
1555
1556         /* Retrieve the physical and logical size for touch devices */
1557         wacom_retrieve_hid_descriptor(hdev, features);
1558         wacom_setup_device_quirks(wacom);
1559
1560         if (features->device_type == WACOM_DEVICETYPE_NONE &&
1561             features->type != WIRELESS) {
1562                 error = features->type == HID_GENERIC ? -ENODEV : 0;
1563
1564                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
1565                          hdev->name,
1566                          error ? "Ignoring" : "Assuming pen");
1567
1568                 if (error)
1569                         goto fail_shared_data;
1570
1571                 features->device_type |= WACOM_DEVICETYPE_PEN;
1572         }
1573
1574         wacom_calculate_res(features);
1575
1576         wacom_update_name(wacom);
1577
1578         error = wacom_add_shared_data(hdev);
1579         if (error)
1580                 goto fail_shared_data;
1581
1582         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
1583              (features->quirks & WACOM_QUIRK_BATTERY)) {
1584                 error = wacom_initialize_battery(wacom);
1585                 if (error)
1586                         goto fail_battery;
1587         }
1588
1589         error = wacom_register_inputs(wacom);
1590         if (error)
1591                 goto fail_register_inputs;
1592
1593         if (hdev->bus == BUS_BLUETOOTH) {
1594                 error = device_create_file(&hdev->dev, &dev_attr_speed);
1595                 if (error)
1596                         hid_warn(hdev,
1597                                  "can't create sysfs speed attribute err: %d\n",
1598                                  error);
1599         }
1600
1601         if (features->type == HID_GENERIC)
1602                 connect_mask |= HID_CONNECT_DRIVER;
1603
1604         /* Regular HID work starts now */
1605         error = hid_hw_start(hdev, connect_mask);
1606         if (error) {
1607                 hid_err(hdev, "hw start failed\n");
1608                 goto fail_hw_start;
1609         }
1610
1611         /* Note that if query fails it is not a hard failure */
1612         wacom_query_tablet_data(hdev, features);
1613
1614         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
1615                 error = hid_hw_open(hdev);
1616
1617         if (wacom_wac->features.type == INTUOSHT &&
1618             wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
1619                         wacom_wac->shared->touch_input = wacom_wac->touch_input;
1620         }
1621
1622         return 0;
1623
1624 fail_hw_start:
1625         if (hdev->bus == BUS_BLUETOOTH)
1626                 device_remove_file(&hdev->dev, &dev_attr_speed);
1627 fail_register_inputs:
1628         wacom_clean_inputs(wacom);
1629         wacom_destroy_battery(wacom);
1630 fail_battery:
1631         wacom_remove_shared_data(wacom);
1632 fail_shared_data:
1633         wacom_clean_inputs(wacom);
1634 fail_allocate_inputs:
1635 fail_type:
1636 fail_pktlen:
1637 fail_parse:
1638         kfree(wacom);
1639         hid_set_drvdata(hdev, NULL);
1640         return error;
1641 }
1642
1643 static void wacom_remove(struct hid_device *hdev)
1644 {
1645         struct wacom *wacom = hid_get_drvdata(hdev);
1646
1647         hid_hw_stop(hdev);
1648
1649         cancel_work_sync(&wacom->work);
1650         wacom_clean_inputs(wacom);
1651         if (hdev->bus == BUS_BLUETOOTH)
1652                 device_remove_file(&hdev->dev, &dev_attr_speed);
1653         wacom_destroy_battery(wacom);
1654         wacom_remove_shared_data(wacom);
1655
1656         hid_set_drvdata(hdev, NULL);
1657         kfree(wacom);
1658 }
1659
1660 #ifdef CONFIG_PM
1661 static int wacom_resume(struct hid_device *hdev)
1662 {
1663         struct wacom *wacom = hid_get_drvdata(hdev);
1664         struct wacom_features *features = &wacom->wacom_wac.features;
1665
1666         mutex_lock(&wacom->lock);
1667
1668         /* switch to wacom mode first */
1669         wacom_query_tablet_data(hdev, features);
1670         wacom_led_control(wacom);
1671
1672         mutex_unlock(&wacom->lock);
1673
1674         return 0;
1675 }
1676
1677 static int wacom_reset_resume(struct hid_device *hdev)
1678 {
1679         return wacom_resume(hdev);
1680 }
1681 #endif /* CONFIG_PM */
1682
1683 static struct hid_driver wacom_driver = {
1684         .name =         "wacom",
1685         .id_table =     wacom_ids,
1686         .probe =        wacom_probe,
1687         .remove =       wacom_remove,
1688         .report =       wacom_wac_report,
1689 #ifdef CONFIG_PM
1690         .resume =       wacom_resume,
1691         .reset_resume = wacom_reset_resume,
1692 #endif
1693         .raw_event =    wacom_raw_event,
1694 };
1695 module_hid_driver(wacom_driver);
1696
1697 MODULE_VERSION(DRIVER_VERSION);
1698 MODULE_AUTHOR(DRIVER_AUTHOR);
1699 MODULE_DESCRIPTION(DRIVER_DESC);
1700 MODULE_LICENSE(DRIVER_LICENSE);