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
  17 #define WAC_MSG_RETRIES         5
  18
  19 #define WAC_CMD_WL_LED_CONTROL  0x03
  20 #define WAC_CMD_LED_CONTROL     0x20
  21 #define WAC_CMD_ICON_START      0x21
  22 #define WAC_CMD_ICON_XFER       0x23
  23 #define WAC_CMD_ICON_BT_XFER    0x26
  24 #define WAC_CMD_RETRIES         10
  25
  26 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
  27 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
  28
  29 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
  30                             size_t size, unsigned int retries)
  31 {
  32         int retval;
  33
  34         do {
  35                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  36                                 HID_REQ_GET_REPORT);
  37         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  38
  39         return retval;
  40 }
  41
  42 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
  43                             size_t size, unsigned int retries)
  44 {
  45         int retval;
  46
  47         do {
  48                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  49                                 HID_REQ_SET_REPORT);
  50         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  51
  52         return retval;
  53 }
  54
  55 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
  56                 u8 *raw_data, int size)
  57 {
  58         struct wacom *wacom = hid_get_drvdata(hdev);
  59
  60         if (size > WACOM_PKGLEN_MAX)
  61                 return 1;
  62
  63         memcpy(wacom->wacom_wac.data, raw_data, size);
  64
  65         wacom_wac_irq(&wacom->wacom_wac, size);
  66
  67         return 0;
  68 }
  69
  70 static int wacom_open(struct input_dev *dev)
  71 {
  72         struct wacom *wacom = input_get_drvdata(dev);
  73         int retval;
  74
  75         mutex_lock(&wacom->lock);
  76         retval = hid_hw_open(wacom->hdev);
  77         mutex_unlock(&wacom->lock);
  78
  79         return retval;
  80 }
  81
  82 static void wacom_close(struct input_dev *dev)
  83 {
  84         struct wacom *wacom = input_get_drvdata(dev);
  85
  86         mutex_lock(&wacom->lock);
  87         hid_hw_close(wacom->hdev);
  88         mutex_unlock(&wacom->lock);
  89 }
  90
  91 /*
  92  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
  93  */
  94 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
  95                                unsigned unit, int exponent)
  96 {
  97         struct hid_field field = {
  98                 .logical_maximum = logical_extents,
  99                 .physical_maximum = physical_extents,
 100                 .unit = unit,
 101                 .unit_exponent = exponent,
 102         };
 103
 104         return hidinput_calc_abs_res(&field, ABS_X);
 105 }
 106
 107 static void wacom_feature_mapping(struct hid_device *hdev,
 108                 struct hid_field *field, struct hid_usage *usage)
 109 {
 110         struct wacom *wacom = hid_get_drvdata(hdev);
 111         struct wacom_features *features = &wacom->wacom_wac.features;
 112         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 113         u8 *data;
 114         int ret;
 115
 116         switch (usage->hid) {
 117         case HID_DG_CONTACTMAX:
 118                 /* leave touch_max as is if predefined */
 119                 if (!features->touch_max) {
 120                         /* read manually */
 121                         data = kzalloc(2, GFP_KERNEL);
 122                         if (!data)
 123                                 break;
 124                         data[0] = field->report->id;
 125                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 126                                                 data, 2, 0);
 127                         if (ret == 2)
 128                                 features->touch_max = data[1];
 129                         kfree(data);
 130                 }
 131                 break;
 132         case HID_DG_INPUTMODE:
 133                 /* Ignore if value index is out of bounds. */
 134                 if (usage->usage_index >= field->report_count) {
 135                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 136                         break;
 137                 }
 138
 139                 hid_data->inputmode = field->report->id;
 140                 hid_data->inputmode_index = usage->usage_index;
 141                 break;
 142         }
 143 }
 144
 145 /*
 146  * Interface Descriptor of wacom devices can be incomplete and
 147  * inconsistent so wacom_features table is used to store stylus
 148  * device's packet lengths, various maximum values, and tablet
 149  * resolution based on product ID's.
 150  *
 151  * For devices that contain 2 interfaces, wacom_features table is
 152  * inaccurate for the touch interface.  Since the Interface Descriptor
 153  * for touch interfaces has pretty complete data, this function exists
 154  * to query tablet for this missing information instead of hard coding in
 155  * an additional table.
 156  *
 157  * A typical Interface Descriptor for a stylus will contain a
 158  * boot mouse application collection that is not of interest and this
 159  * function will ignore it.
 160  *
 161  * It also contains a digitizer application collection that also is not
 162  * of interest since any information it contains would be duplicate
 163  * of what is in wacom_features. Usually it defines a report of an array
 164  * of bytes that could be used as max length of the stylus packet returned.
 165  * If it happens to define a Digitizer-Stylus Physical Collection then
 166  * the X and Y logical values contain valid data but it is ignored.
 167  *
 168  * A typical Interface Descriptor for a touch interface will contain a
 169  * Digitizer-Finger Physical Collection which will define both logical
 170  * X/Y maximum as well as the physical size of tablet. Since touch
 171  * interfaces haven't supported pressure or distance, this is enough
 172  * information to override invalid values in the wacom_features table.
 173  *
 174  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 175  * data. We deal with them after returning from this function.
 176  */
 177 static void wacom_usage_mapping(struct hid_device *hdev,
 178                 struct hid_field *field, struct hid_usage *usage)
 179 {
 180         struct wacom *wacom = hid_get_drvdata(hdev);
 181         struct wacom_features *features = &wacom->wacom_wac.features;
 182         bool finger = (field->logical == HID_DG_FINGER) ||
 183                       (field->physical == HID_DG_FINGER);
 184         bool pen = (field->logical == HID_DG_STYLUS) ||
 185                    (field->physical == HID_DG_STYLUS);
 186
 187         /*
 188         * Requiring Stylus Usage will ignore boot mouse
 189         * X/Y values and some cases of invalid Digitizer X/Y
 190         * values commonly reported.
 191         */
 192         if (!pen && !finger)
 193                 return;
 194
 195         /*
 196          * Bamboo models do not support HID_DG_CONTACTMAX.
 197          * And, Bamboo Pen only descriptor contains touch.
 198          */
 199         if (features->type != BAMBOO_PT) {
 200                 /* ISDv4 touch devices at least supports one touch point */
 201                 if (finger && !features->touch_max)
 202                         features->touch_max = 1;
 203         }
 204
 205         switch (usage->hid) {
 206         case HID_GD_X:
 207                 features->x_max = field->logical_maximum;
 208                 if (finger) {
 209                         features->device_type = BTN_TOOL_FINGER;
 210                         features->x_phy = field->physical_maximum;
 211                         if (features->type != BAMBOO_PT) {
 212                                 features->unit = field->unit;
 213                                 features->unitExpo = field->unit_exponent;
 214                         }
 215                 } else {
 216                         features->device_type = BTN_TOOL_PEN;
 217                 }
 218                 break;
 219         case HID_GD_Y:
 220                 features->y_max = field->logical_maximum;
 221                 if (finger) {
 222                         features->y_phy = field->physical_maximum;
 223                         if (features->type != BAMBOO_PT) {
 224                                 features->unit = field->unit;
 225                                 features->unitExpo = field->unit_exponent;
 226                         }
 227                 }
 228                 break;
 229         case HID_DG_TIPPRESSURE:
 230                 if (pen)
 231                         features->pressure_max = field->logical_maximum;
 232                 break;
 233         }
 234
 235         if (features->type == HID_GENERIC)
 236                 wacom_wac_usage_mapping(hdev, field, usage);
 237 }
 238
 239 static void wacom_parse_hid(struct hid_device *hdev,
 240                            struct wacom_features *features)
 241 {
 242         struct hid_report_enum *rep_enum;
 243         struct hid_report *hreport;
 244         int i, j;
 245
 246         /* check features first */
 247         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 248         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 249                 for (i = 0; i < hreport->maxfield; i++) {
 250                         /* Ignore if report count is out of bounds. */
 251                         if (hreport->field[i]->report_count < 1)
 252                                 continue;
 253
 254                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 255                                 wacom_feature_mapping(hdev, hreport->field[i],
 256                                                 hreport->field[i]->usage + j);
 257                         }
 258                 }
 259         }
 260
 261         /* now check the input usages */
 262         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 263         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 264
 265                 if (!hreport->maxfield)
 266                         continue;
 267
 268                 for (i = 0; i < hreport->maxfield; i++)
 269                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 270                                 wacom_usage_mapping(hdev, hreport->field[i],
 271                                                 hreport->field[i]->usage + j);
 272         }
 273 }
 274
 275 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 276 {
 277         struct wacom *wacom = hid_get_drvdata(hdev);
 278         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 279         struct hid_report *r;
 280         struct hid_report_enum *re;
 281
 282         if (hid_data->inputmode < 0)
 283                 return 0;
 284
 285         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 286         r = re->report_id_hash[hid_data->inputmode];
 287         if (r) {
 288                 r->field[0]->value[hid_data->inputmode_index] = 2;
 289                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 290         }
 291         return 0;
 292 }
 293
 294 static int wacom_set_device_mode(struct hid_device *hdev, int report_id,
 295                 int length, int mode)
 296 {
 297         unsigned char *rep_data;
 298         int error = -ENOMEM, limit = 0;
 299
 300         rep_data = kzalloc(length, GFP_KERNEL);
 301         if (!rep_data)
 302                 return error;
 303
 304         do {
 305                 rep_data[0] = report_id;
 306                 rep_data[1] = mode;
 307
 308                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 309                                          length, 1);
 310                 if (error >= 0)
 311                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 312                                                  rep_data, length, 1);
 313         } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
 314
 315         kfree(rep_data);
 316
 317         return error < 0 ? error : 0;
 318 }
 319
 320 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 321                 struct wacom_features *features)
 322 {
 323         struct wacom *wacom = hid_get_drvdata(hdev);
 324         int ret;
 325         u8 rep_data[2];
 326
 327         switch (features->type) {
 328         case GRAPHIRE_BT:
 329                 rep_data[0] = 0x03;
 330                 rep_data[1] = 0x00;
 331                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 332                                         3);
 333
 334                 if (ret >= 0) {
 335                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 336                         rep_data[1] = 0x00;
 337
 338                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 339                                                 rep_data, 2, 3);
 340
 341                         if (ret >= 0) {
 342                                 wacom->wacom_wac.bt_high_speed = speed;
 343                                 return 0;
 344                         }
 345                 }
 346
 347                 /*
 348                  * Note that if the raw queries fail, it's not a hard failure
 349                  * and it is safe to continue
 350                  */
 351                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 352                          rep_data[0], ret);
 353                 break;
 354         case INTUOS4WL:
 355                 if (speed == 1)
 356                         wacom->wacom_wac.bt_features &= ~0x20;
 357                 else
 358                         wacom->wacom_wac.bt_features |= 0x20;
 359
 360                 rep_data[0] = 0x03;
 361                 rep_data[1] = wacom->wacom_wac.bt_features;
 362
 363                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 364                                         1);
 365                 if (ret >= 0)
 366                         wacom->wacom_wac.bt_high_speed = speed;
 367                 break;
 368         }
 369
 370         return 0;
 371 }
 372
 373 /*
 374  * Switch the tablet into its most-capable mode. Wacom tablets are
 375  * typically configured to power-up in a mode which sends mouse-like
 376  * reports to the OS. To get absolute position, pressure data, etc.
 377  * from the tablet, it is necessary to switch the tablet out of this
 378  * mode and into one which sends the full range of tablet data.
 379  */
 380 static int wacom_query_tablet_data(struct hid_device *hdev,
 381                 struct wacom_features *features)
 382 {
 383         if (hdev->bus == BUS_BLUETOOTH)
 384                 return wacom_bt_query_tablet_data(hdev, 1, features);
 385
 386         if (features->type == HID_GENERIC)
 387                 return wacom_hid_set_device_mode(hdev);
 388
 389         if (features->device_type == BTN_TOOL_FINGER) {
 390                 if (features->type > TABLETPC) {
 391                         /* MT Tablet PC touch */
 392                         return wacom_set_device_mode(hdev, 3, 4, 4);
 393                 }
 394                 else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
 395                         return wacom_set_device_mode(hdev, 18, 3, 2);
 396                 }
 397         } else if (features->device_type == BTN_TOOL_PEN) {
 398                 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
 399                         return wacom_set_device_mode(hdev, 2, 2, 2);
 400                 }
 401         }
 402
 403         return 0;
 404 }
 405
 406 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 407                                          struct wacom_features *features)
 408 {
 409         struct wacom *wacom = hid_get_drvdata(hdev);
 410         struct usb_interface *intf = wacom->intf;
 411
 412         /* default features */
 413         features->device_type = BTN_TOOL_PEN;
 414         features->x_fuzz = 4;
 415         features->y_fuzz = 4;
 416         features->pressure_fuzz = 0;
 417         features->distance_fuzz = 0;
 418
 419         /*
 420          * The wireless device HID is basic and layout conflicts with
 421          * other tablets (monitor and touch interface can look like pen).
 422          * Skip the query for this type and modify defaults based on
 423          * interface number.
 424          */
 425         if (features->type == WIRELESS) {
 426                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
 427                         features->device_type = 0;
 428                 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
 429                         features->device_type = BTN_TOOL_FINGER;
 430                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
 431                 }
 432         }
 433
 434         /* only devices that support touch need to retrieve the info */
 435         if (features->type < BAMBOO_PT)
 436                 return;
 437
 438         wacom_parse_hid(hdev, features);
 439 }
 440
 441 struct wacom_hdev_data {
 442         struct list_head list;
 443         struct kref kref;
 444         struct hid_device *dev;
 445         struct wacom_shared shared;
 446 };
 447
 448 static LIST_HEAD(wacom_udev_list);
 449 static DEFINE_MUTEX(wacom_udev_list_lock);
 450
 451 static bool wacom_are_sibling(struct hid_device *hdev,
 452                 struct hid_device *sibling)
 453 {
 454         struct wacom *wacom = hid_get_drvdata(hdev);
 455         struct wacom_features *features = &wacom->wacom_wac.features;
 456         int vid = features->oVid;
 457         int pid = features->oPid;
 458         int n1,n2;
 459
 460         if (vid == 0 && pid == 0) {
 461                 vid = hdev->vendor;
 462                 pid = hdev->product;
 463         }
 464
 465         if (vid != sibling->vendor || pid != sibling->product)
 466                 return false;
 467
 468         /* Compare the physical path. */
 469         n1 = strrchr(hdev->phys, '.') - hdev->phys;
 470         n2 = strrchr(sibling->phys, '.') - sibling->phys;
 471         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 472                 return false;
 473
 474         return !strncmp(hdev->phys, sibling->phys, n1);
 475 }
 476
 477 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 478 {
 479         struct wacom_hdev_data *data;
 480
 481         list_for_each_entry(data, &wacom_udev_list, list) {
 482                 if (wacom_are_sibling(hdev, data->dev)) {
 483                         kref_get(&data->kref);
 484                         return data;
 485                 }
 486         }
 487
 488         return NULL;
 489 }
 490
 491 static int wacom_add_shared_data(struct hid_device *hdev)
 492 {
 493         struct wacom *wacom = hid_get_drvdata(hdev);
 494         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 495         struct wacom_hdev_data *data;
 496         int retval = 0;
 497
 498         mutex_lock(&wacom_udev_list_lock);
 499
 500         data = wacom_get_hdev_data(hdev);
 501         if (!data) {
 502                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 503                 if (!data) {
 504                         retval = -ENOMEM;
 505                         goto out;
 506                 }
 507
 508                 kref_init(&data->kref);
 509                 data->dev = hdev;
 510                 list_add_tail(&data->list, &wacom_udev_list);
 511         }
 512
 513         wacom_wac->shared = &data->shared;
 514
 515 out:
 516         mutex_unlock(&wacom_udev_list_lock);
 517         return retval;
 518 }
 519
 520 static void wacom_release_shared_data(struct kref *kref)
 521 {
 522         struct wacom_hdev_data *data =
 523                 container_of(kref, struct wacom_hdev_data, kref);
 524
 525         mutex_lock(&wacom_udev_list_lock);
 526         list_del(&data->list);
 527         mutex_unlock(&wacom_udev_list_lock);
 528
 529         kfree(data);
 530 }
 531
 532 static void wacom_remove_shared_data(struct wacom_wac *wacom)
 533 {
 534         struct wacom_hdev_data *data;
 535
 536         if (wacom->shared) {
 537                 data = container_of(wacom->shared, struct wacom_hdev_data, shared);
 538                 kref_put(&data->kref, wacom_release_shared_data);
 539                 wacom->shared = NULL;
 540         }
 541 }
 542
 543 static int wacom_led_control(struct wacom *wacom)
 544 {
 545         unsigned char *buf;
 546         int retval;
 547         unsigned char report_id = WAC_CMD_LED_CONTROL;
 548         int buf_size = 9;
 549
 550         if (wacom->wacom_wac.pid) { /* wireless connected */
 551                 report_id = WAC_CMD_WL_LED_CONTROL;
 552                 buf_size = 13;
 553         }
 554         buf = kzalloc(buf_size, GFP_KERNEL);
 555         if (!buf)
 556                 return -ENOMEM;
 557
 558         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 559             wacom->wacom_wac.features.type <= INTUOSPL) {
 560                 /*
 561                  * Touch Ring and crop mark LED luminance may take on
 562                  * one of four values:
 563                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 564                  */
 565                 int ring_led = wacom->led.select[0] & 0x03;
 566                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 567                 int crop_lum = 0;
 568                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 569
 570                 buf[0] = report_id;
 571                 if (wacom->wacom_wac.pid) {
 572                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 573                                          buf, buf_size, WAC_CMD_RETRIES);
 574                         buf[0] = report_id;
 575                         buf[4] = led_bits;
 576                 } else
 577                         buf[1] = led_bits;
 578         }
 579         else {
 580                 int led = wacom->led.select[0] | 0x4;
 581
 582                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 583                     wacom->wacom_wac.features.type == WACOM_24HD)
 584                         led |= (wacom->led.select[1] << 4) | 0x40;
 585
 586                 buf[0] = report_id;
 587                 buf[1] = led;
 588                 buf[2] = wacom->led.llv;
 589                 buf[3] = wacom->led.hlv;
 590                 buf[4] = wacom->led.img_lum;
 591         }
 592
 593         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 594                                   WAC_CMD_RETRIES);
 595         kfree(buf);
 596
 597         return retval;
 598 }
 599
 600 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 601                 const unsigned len, const void *img)
 602 {
 603         unsigned char *buf;
 604         int i, retval;
 605         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 606
 607         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 608         if (!buf)
 609                 return -ENOMEM;
 610
 611         /* Send 'start' command */
 612         buf[0] = WAC_CMD_ICON_START;
 613         buf[1] = 1;
 614         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 615                                   WAC_CMD_RETRIES);
 616         if (retval < 0)
 617                 goto out;
 618
 619         buf[0] = xfer_id;
 620         buf[1] = button_id & 0x07;
 621         for (i = 0; i < 4; i++) {
 622                 buf[2] = i;
 623                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 624
 625                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 626                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 627                 if (retval < 0)
 628                         break;
 629         }
 630
 631         /* Send 'stop' */
 632         buf[0] = WAC_CMD_ICON_START;
 633         buf[1] = 0;
 634         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 635                          WAC_CMD_RETRIES);
 636
 637 out:
 638         kfree(buf);
 639         return retval;
 640 }
 641
 642 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 643                                       const char *buf, size_t count)
 644 {
 645         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 646         struct wacom *wacom = hid_get_drvdata(hdev);
 647         unsigned int id;
 648         int err;
 649
 650         err = kstrtouint(buf, 10, &id);
 651         if (err)
 652                 return err;
 653
 654         mutex_lock(&wacom->lock);
 655
 656         wacom->led.select[set_id] = id & 0x3;
 657         err = wacom_led_control(wacom);
 658
 659         mutex_unlock(&wacom->lock);
 660
 661         return err < 0 ? err : count;
 662 }
 663
 664 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 665 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 666         struct device_attribute *attr, const char *buf, size_t count)   \
 667 {                                                                       \
 668         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 669 }                                                                       \
 670 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 671         struct device_attribute *attr, char *buf)                       \
 672 {                                                                       \
 673         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 674         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 675         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 676                          wacom->led.select[SET_ID]);                    \
 677 }                                                                       \
 678 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 679                     wacom_led##SET_ID##_select_show,                    \
 680                     wacom_led##SET_ID##_select_store)
 681
 682 DEVICE_LED_SELECT_ATTR(0);
 683 DEVICE_LED_SELECT_ATTR(1);
 684
 685 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 686                                      const char *buf, size_t count)
 687 {
 688         unsigned int value;
 689         int err;
 690
 691         err = kstrtouint(buf, 10, &value);
 692         if (err)
 693                 return err;
 694
 695         mutex_lock(&wacom->lock);
 696
 697         *dest = value & 0x7f;
 698         err = wacom_led_control(wacom);
 699
 700         mutex_unlock(&wacom->lock);
 701
 702         return err < 0 ? err : count;
 703 }
 704
 705 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 706 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 707         struct device_attribute *attr, const char *buf, size_t count)   \
 708 {                                                                       \
 709         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 710         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 711                                                                         \
 712         return wacom_luminance_store(wacom, &wacom->led.field,          \
 713                                      buf, count);                       \
 714 }                                                                       \
 715 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 716         struct device_attribute *attr, char *buf)                       \
 717 {                                                                       \
 718         struct wacom *wacom = dev_get_drvdata(dev);                     \
 719         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 720 }                                                                       \
 721 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 722                    wacom_##name##_luminance_show,                       \
 723                    wacom_##name##_luminance_store)
 724
 725 DEVICE_LUMINANCE_ATTR(status0, llv);
 726 DEVICE_LUMINANCE_ATTR(status1, hlv);
 727 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 728
 729 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 730                                         const char *buf, size_t count)
 731 {
 732         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 733         struct wacom *wacom = hid_get_drvdata(hdev);
 734         int err;
 735         unsigned len;
 736         u8 xfer_id;
 737
 738         if (hdev->bus == BUS_BLUETOOTH) {
 739                 len = 256;
 740                 xfer_id = WAC_CMD_ICON_BT_XFER;
 741         } else {
 742                 len = 1024;
 743                 xfer_id = WAC_CMD_ICON_XFER;
 744         }
 745
 746         if (count != len)
 747                 return -EINVAL;
 748
 749         mutex_lock(&wacom->lock);
 750
 751         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
 752
 753         mutex_unlock(&wacom->lock);
 754
 755         return err < 0 ? err : count;
 756 }
 757
 758 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 759 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 760         struct device_attribute *attr, const char *buf, size_t count)   \
 761 {                                                                       \
 762         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 763 }                                                                       \
 764 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
 765                    NULL, wacom_btnimg##BUTTON_ID##_store)
 766
 767 DEVICE_BTNIMG_ATTR(0);
 768 DEVICE_BTNIMG_ATTR(1);
 769 DEVICE_BTNIMG_ATTR(2);
 770 DEVICE_BTNIMG_ATTR(3);
 771 DEVICE_BTNIMG_ATTR(4);
 772 DEVICE_BTNIMG_ATTR(5);
 773 DEVICE_BTNIMG_ATTR(6);
 774 DEVICE_BTNIMG_ATTR(7);
 775
 776 static struct attribute *cintiq_led_attrs[] = {
 777         &dev_attr_status_led0_select.attr,
 778         &dev_attr_status_led1_select.attr,
 779         NULL
 780 };
 781
 782 static struct attribute_group cintiq_led_attr_group = {
 783         .name = "wacom_led",
 784         .attrs = cintiq_led_attrs,
 785 };
 786
 787 static struct attribute *intuos4_led_attrs[] = {
 788         &dev_attr_status0_luminance.attr,
 789         &dev_attr_status1_luminance.attr,
 790         &dev_attr_status_led0_select.attr,
 791         &dev_attr_buttons_luminance.attr,
 792         &dev_attr_button0_rawimg.attr,
 793         &dev_attr_button1_rawimg.attr,
 794         &dev_attr_button2_rawimg.attr,
 795         &dev_attr_button3_rawimg.attr,
 796         &dev_attr_button4_rawimg.attr,
 797         &dev_attr_button5_rawimg.attr,
 798         &dev_attr_button6_rawimg.attr,
 799         &dev_attr_button7_rawimg.attr,
 800         NULL
 801 };
 802
 803 static struct attribute_group intuos4_led_attr_group = {
 804         .name = "wacom_led",
 805         .attrs = intuos4_led_attrs,
 806 };
 807
 808 static struct attribute *intuos5_led_attrs[] = {
 809         &dev_attr_status0_luminance.attr,
 810         &dev_attr_status_led0_select.attr,
 811         NULL
 812 };
 813
 814 static struct attribute_group intuos5_led_attr_group = {
 815         .name = "wacom_led",
 816         .attrs = intuos5_led_attrs,
 817 };
 818
 819 static int wacom_initialize_leds(struct wacom *wacom)
 820 {
 821         int error;
 822
 823         /* Initialize default values */
 824         switch (wacom->wacom_wac.features.type) {
 825         case INTUOS4S:
 826         case INTUOS4:
 827         case INTUOS4WL:
 828         case INTUOS4L:
 829                 wacom->led.select[0] = 0;
 830                 wacom->led.select[1] = 0;
 831                 wacom->led.llv = 10;
 832                 wacom->led.hlv = 20;
 833                 wacom->led.img_lum = 10;
 834                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 835                                            &intuos4_led_attr_group);
 836                 break;
 837
 838         case WACOM_24HD:
 839         case WACOM_21UX2:
 840                 wacom->led.select[0] = 0;
 841                 wacom->led.select[1] = 0;
 842                 wacom->led.llv = 0;
 843                 wacom->led.hlv = 0;
 844                 wacom->led.img_lum = 0;
 845
 846                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 847                                            &cintiq_led_attr_group);
 848                 break;
 849
 850         case INTUOS5S:
 851         case INTUOS5:
 852         case INTUOS5L:
 853         case INTUOSPS:
 854         case INTUOSPM:
 855         case INTUOSPL:
 856                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) {
 857                         wacom->led.select[0] = 0;
 858                         wacom->led.select[1] = 0;
 859                         wacom->led.llv = 32;
 860                         wacom->led.hlv = 0;
 861                         wacom->led.img_lum = 0;
 862
 863                         error = sysfs_create_group(&wacom->hdev->dev.kobj,
 864                                                   &intuos5_led_attr_group);
 865                 } else
 866                         return 0;
 867                 break;
 868
 869         default:
 870                 return 0;
 871         }
 872
 873         if (error) {
 874                 hid_err(wacom->hdev,
 875                         "cannot create sysfs group err: %d\n", error);
 876                 return error;
 877         }
 878         wacom_led_control(wacom);
 879         wacom->led_initialized = true;
 880
 881         return 0;
 882 }
 883
 884 static void wacom_destroy_leds(struct wacom *wacom)
 885 {
 886         if (!wacom->led_initialized)
 887                 return;
 888
 889         wacom->led_initialized = false;
 890
 891         switch (wacom->wacom_wac.features.type) {
 892         case INTUOS4S:
 893         case INTUOS4:
 894         case INTUOS4WL:
 895         case INTUOS4L:
 896                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 897                                    &intuos4_led_attr_group);
 898                 break;
 899
 900         case WACOM_24HD:
 901         case WACOM_21UX2:
 902                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 903                                    &cintiq_led_attr_group);
 904                 break;
 905
 906         case INTUOS5S:
 907         case INTUOS5:
 908         case INTUOS5L:
 909         case INTUOSPS:
 910         case INTUOSPM:
 911         case INTUOSPL:
 912                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN)
 913                         sysfs_remove_group(&wacom->hdev->dev.kobj,
 914                                            &intuos5_led_attr_group);
 915                 break;
 916         }
 917 }
 918
 919 static enum power_supply_property wacom_battery_props[] = {
 920         POWER_SUPPLY_PROP_STATUS,
 921         POWER_SUPPLY_PROP_SCOPE,
 922         POWER_SUPPLY_PROP_CAPACITY
 923 };
 924
 925 static enum power_supply_property wacom_ac_props[] = {
 926         POWER_SUPPLY_PROP_PRESENT,
 927         POWER_SUPPLY_PROP_ONLINE,
 928         POWER_SUPPLY_PROP_SCOPE,
 929 };
 930
 931 static int wacom_battery_get_property(struct power_supply *psy,
 932                                       enum power_supply_property psp,
 933                                       union power_supply_propval *val)
 934 {
 935         struct wacom *wacom = container_of(psy, struct wacom, battery);
 936         int ret = 0;
 937
 938         switch (psp) {
 939                 case POWER_SUPPLY_PROP_SCOPE:
 940                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 941                         break;
 942                 case POWER_SUPPLY_PROP_CAPACITY:
 943                         val->intval =
 944                                 wacom->wacom_wac.battery_capacity;
 945                         break;
 946                 case POWER_SUPPLY_PROP_STATUS:
 947                         if (wacom->wacom_wac.bat_charging)
 948                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 949                         else if (wacom->wacom_wac.battery_capacity == 100 &&
 950                                     wacom->wacom_wac.ps_connected)
 951                                 val->intval = POWER_SUPPLY_STATUS_FULL;
 952                         else
 953                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 954                         break;
 955                 default:
 956                         ret = -EINVAL;
 957                         break;
 958         }
 959
 960         return ret;
 961 }
 962
 963 static int wacom_ac_get_property(struct power_supply *psy,
 964                                 enum power_supply_property psp,
 965                                 union power_supply_propval *val)
 966 {
 967         struct wacom *wacom = container_of(psy, struct wacom, ac);
 968         int ret = 0;
 969
 970         switch (psp) {
 971         case POWER_SUPPLY_PROP_PRESENT:
 972                 /* fall through */
 973         case POWER_SUPPLY_PROP_ONLINE:
 974                 val->intval = wacom->wacom_wac.ps_connected;
 975                 break;
 976         case POWER_SUPPLY_PROP_SCOPE:
 977                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 978                 break;
 979         default:
 980                 ret = -EINVAL;
 981                 break;
 982         }
 983         return ret;
 984 }
 985
 986 static int wacom_initialize_battery(struct wacom *wacom)
 987 {
 988         static atomic_t battery_no = ATOMIC_INIT(0);
 989         int error;
 990         unsigned long n;
 991
 992         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {
 993                 n = atomic_inc_return(&battery_no) - 1;
 994
 995                 wacom->battery.properties = wacom_battery_props;
 996                 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
 997                 wacom->battery.get_property = wacom_battery_get_property;
 998                 sprintf(wacom->wacom_wac.bat_name, "wacom_battery_%ld", n);
 999                 wacom->battery.name = wacom->wacom_wac.bat_name;
1000                 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1001                 wacom->battery.use_for_apm = 0;
1002
1003                 wacom->ac.properties = wacom_ac_props;
1004                 wacom->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
1005                 wacom->ac.get_property = wacom_ac_get_property;
1006                 sprintf(wacom->wacom_wac.ac_name, "wacom_ac_%ld", n);
1007                 wacom->ac.name = wacom->wacom_wac.ac_name;
1008                 wacom->ac.type = POWER_SUPPLY_TYPE_MAINS;
1009                 wacom->ac.use_for_apm = 0;
1010
1011                 error = power_supply_register(&wacom->hdev->dev,
1012                                               &wacom->battery);
1013                 if (error)
1014                         return error;
1015
1016                 power_supply_powers(&wacom->battery, &wacom->hdev->dev);
1017
1018                 error = power_supply_register(&wacom->hdev->dev, &wacom->ac);
1019                 if (error) {
1020                         power_supply_unregister(&wacom->battery);
1021                         return error;
1022                 }
1023
1024                 power_supply_powers(&wacom->ac, &wacom->hdev->dev);
1025         }
1026
1027         return 0;
1028 }
1029
1030 static void wacom_destroy_battery(struct wacom *wacom)
1031 {
1032         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1033              wacom->battery.dev) {
1034                 power_supply_unregister(&wacom->battery);
1035                 wacom->battery.dev = NULL;
1036                 power_supply_unregister(&wacom->ac);
1037                 wacom->ac.dev = NULL;
1038         }
1039 }
1040
1041 static ssize_t wacom_show_speed(struct device *dev,
1042                                 struct device_attribute
1043                                 *attr, char *buf)
1044 {
1045         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1046         struct wacom *wacom = hid_get_drvdata(hdev);
1047
1048         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1049 }
1050
1051 static ssize_t wacom_store_speed(struct device *dev,
1052                                 struct device_attribute *attr,
1053                                 const char *buf, size_t count)
1054 {
1055         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1056         struct wacom *wacom = hid_get_drvdata(hdev);
1057         u8 new_speed;
1058
1059         if (kstrtou8(buf, 0, &new_speed))
1060                 return -EINVAL;
1061
1062         if (new_speed != 0 && new_speed != 1)
1063                 return -EINVAL;
1064
1065         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1066
1067         return count;
1068 }
1069
1070 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1071                 wacom_show_speed, wacom_store_speed);
1072
1073 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1074 {
1075         struct input_dev *input_dev;
1076         struct hid_device *hdev = wacom->hdev;
1077         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1078
1079         input_dev = input_allocate_device();
1080         if (!input_dev)
1081                 return NULL;
1082
1083         input_dev->name = wacom_wac->name;
1084         input_dev->phys = hdev->phys;
1085         input_dev->dev.parent = &hdev->dev;
1086         input_dev->open = wacom_open;
1087         input_dev->close = wacom_close;
1088         input_dev->uniq = hdev->uniq;
1089         input_dev->id.bustype = hdev->bus;
1090         input_dev->id.vendor  = hdev->vendor;
1091         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1092         input_dev->id.version = hdev->version;
1093         input_set_drvdata(input_dev, wacom);
1094
1095         return input_dev;
1096 }
1097
1098 static void wacom_free_inputs(struct wacom *wacom)
1099 {
1100         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1101
1102         if (wacom_wac->input)
1103                 input_free_device(wacom_wac->input);
1104         if (wacom_wac->pad_input)
1105                 input_free_device(wacom_wac->pad_input);
1106         wacom_wac->input = NULL;
1107         wacom_wac->pad_input = NULL;
1108 }
1109
1110 static int wacom_allocate_inputs(struct wacom *wacom)
1111 {
1112         struct input_dev *input_dev, *pad_input_dev;
1113         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1114
1115         input_dev = wacom_allocate_input(wacom);
1116         pad_input_dev = wacom_allocate_input(wacom);
1117         if (!input_dev || !pad_input_dev) {
1118                 wacom_free_inputs(wacom);
1119                 return -ENOMEM;
1120         }
1121
1122         wacom_wac->input = input_dev;
1123         wacom_wac->pad_input = pad_input_dev;
1124         wacom_wac->pad_input->name = wacom_wac->pad_name;
1125
1126         return 0;
1127 }
1128
1129 static void wacom_clean_inputs(struct wacom *wacom)
1130 {
1131         if (wacom->wacom_wac.input) {
1132                 if (wacom->wacom_wac.input_registered)
1133                         input_unregister_device(wacom->wacom_wac.input);
1134                 else
1135                         input_free_device(wacom->wacom_wac.input);
1136         }
1137         if (wacom->wacom_wac.pad_input) {
1138                 if (wacom->wacom_wac.pad_registered)
1139                         input_unregister_device(wacom->wacom_wac.pad_input);
1140                 else
1141                         input_free_device(wacom->wacom_wac.pad_input);
1142         }
1143         wacom->wacom_wac.input = NULL;
1144         wacom->wacom_wac.pad_input = NULL;
1145         wacom_destroy_leds(wacom);
1146 }
1147
1148 static int wacom_register_inputs(struct wacom *wacom)
1149 {
1150         struct input_dev *input_dev, *pad_input_dev;
1151         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1152         int error;
1153
1154         input_dev = wacom_wac->input;
1155         pad_input_dev = wacom_wac->pad_input;
1156
1157         if (!input_dev || !pad_input_dev)
1158                 return -EINVAL;
1159
1160         error = wacom_setup_pentouch_input_capabilities(input_dev, wacom_wac);
1161         if (!error) {
1162                 error = input_register_device(input_dev);
1163                 if (error)
1164                         return error;
1165                 wacom_wac->input_registered = true;
1166         }
1167
1168         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1169         if (error) {
1170                 /* no pad in use on this interface */
1171                 input_free_device(pad_input_dev);
1172                 wacom_wac->pad_input = NULL;
1173                 pad_input_dev = NULL;
1174         } else {
1175                 error = input_register_device(pad_input_dev);
1176                 if (error)
1177                         goto fail_register_pad_input;
1178                 wacom_wac->pad_registered = true;
1179
1180                 error = wacom_initialize_leds(wacom);
1181                 if (error)
1182                         goto fail_leds;
1183         }
1184
1185         return 0;
1186
1187 fail_leds:
1188         input_unregister_device(pad_input_dev);
1189         pad_input_dev = NULL;
1190         wacom_wac->pad_registered = false;
1191 fail_register_pad_input:
1192         input_unregister_device(input_dev);
1193         wacom_wac->input = NULL;
1194         wacom_wac->input_registered = false;
1195         return error;
1196 }
1197
1198 static void wacom_wireless_work(struct work_struct *work)
1199 {
1200         struct wacom *wacom = container_of(work, struct wacom, work);
1201         struct usb_device *usbdev = wacom->usbdev;
1202         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1203         struct hid_device *hdev1, *hdev2;
1204         struct wacom *wacom1, *wacom2;
1205         struct wacom_wac *wacom_wac1, *wacom_wac2;
1206         int error;
1207
1208         /*
1209          * Regardless if this is a disconnect or a new tablet,
1210          * remove any existing input and battery devices.
1211          */
1212
1213         wacom_destroy_battery(wacom);
1214
1215         /* Stylus interface */
1216         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
1217         wacom1 = hid_get_drvdata(hdev1);
1218         wacom_wac1 = &(wacom1->wacom_wac);
1219         wacom_clean_inputs(wacom1);
1220
1221         /* Touch interface */
1222         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
1223         wacom2 = hid_get_drvdata(hdev2);
1224         wacom_wac2 = &(wacom2->wacom_wac);
1225         wacom_clean_inputs(wacom2);
1226
1227         if (wacom_wac->pid == 0) {
1228                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
1229                 wacom_wac1->shared->type = 0;
1230         } else {
1231                 const struct hid_device_id *id = wacom_ids;
1232
1233                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
1234                          wacom_wac->pid);
1235
1236                 while (id->bus) {
1237                         if (id->vendor == USB_VENDOR_ID_WACOM &&
1238                             id->product == wacom_wac->pid)
1239                                 break;
1240                         id++;
1241                 }
1242
1243                 if (!id->bus) {
1244                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
1245                         return;
1246                 }
1247
1248                 /* Stylus interface */
1249                 wacom_wac1->features =
1250                         *((struct wacom_features *)id->driver_data);
1251                 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1252                 snprintf(wacom_wac1->name, WACOM_NAME_MAX, "%s (WL) Pen",
1253                          wacom_wac1->features.name);
1254                 snprintf(wacom_wac1->pad_name, WACOM_NAME_MAX, "%s (WL) Pad",
1255                          wacom_wac1->features.name);
1256                 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1257                 wacom_wac1->shared->type = wacom_wac1->features.type;
1258                 wacom_wac1->pid = wacom_wac->pid;
1259                 error = wacom_allocate_inputs(wacom1) ||
1260                         wacom_register_inputs(wacom1);
1261                 if (error)
1262                         goto fail;
1263
1264                 /* Touch interface */
1265                 if (wacom_wac1->features.touch_max ||
1266                     wacom_wac1->features.type == INTUOSHT) {
1267                         wacom_wac2->features =
1268                                 *((struct wacom_features *)id->driver_data);
1269                         wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1270                         wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1271                         wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1272                         if (wacom_wac2->features.touch_max)
1273                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1274                                          "%s (WL) Finger",wacom_wac2->features.name);
1275                         else
1276                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1277                                          "%s (WL) Pad",wacom_wac2->features.name);
1278                         snprintf(wacom_wac2->pad_name, WACOM_NAME_MAX,
1279                                  "%s (WL) Pad", wacom_wac2->features.name);
1280                         wacom_wac2->pid = wacom_wac->pid;
1281                         error = wacom_allocate_inputs(wacom2) ||
1282                                 wacom_register_inputs(wacom2);
1283                         if (error)
1284                                 goto fail;
1285
1286                         if (wacom_wac1->features.type == INTUOSHT &&
1287                             wacom_wac1->features.touch_max)
1288                                 wacom_wac->shared->touch_input = wacom_wac2->input;
1289                 }
1290
1291                 error = wacom_initialize_battery(wacom);
1292                 if (error)
1293                         goto fail;
1294         }
1295
1296         return;
1297
1298 fail:
1299         wacom_clean_inputs(wacom1);
1300         wacom_clean_inputs(wacom2);
1301         return;
1302 }
1303
1304 /*
1305  * Not all devices report physical dimensions from HID.
1306  * Compute the default from hardcoded logical dimension
1307  * and resolution before driver overwrites them.
1308  */
1309 static void wacom_set_default_phy(struct wacom_features *features)
1310 {
1311         if (features->x_resolution) {
1312                 features->x_phy = (features->x_max * 100) /
1313                                         features->x_resolution;
1314                 features->y_phy = (features->y_max * 100) /
1315                                         features->y_resolution;
1316         }
1317 }
1318
1319 static void wacom_calculate_res(struct wacom_features *features)
1320 {
1321         features->x_resolution = wacom_calc_hid_res(features->x_max,
1322                                                     features->x_phy,
1323                                                     features->unit,
1324                                                     features->unitExpo);
1325         features->y_resolution = wacom_calc_hid_res(features->y_max,
1326                                                     features->y_phy,
1327                                                     features->unit,
1328                                                     features->unitExpo);
1329 }
1330
1331 static int wacom_hid_report_len(struct hid_report *report)
1332 {
1333         /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
1334         return ((report->size - 1) >> 3) + 1 + (report->id > 0);
1335 }
1336
1337 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1338 {
1339         struct hid_report_enum *report_enum;
1340         struct hid_report *report;
1341         size_t size = 0;
1342
1343         report_enum = hdev->report_enum + HID_INPUT_REPORT;
1344
1345         list_for_each_entry(report, &report_enum->report_list, list) {
1346                 size_t report_size = wacom_hid_report_len(report);
1347                 if (report_size > size)
1348                         size = report_size;
1349         }
1350
1351         return size;
1352 }
1353
1354 static int wacom_probe(struct hid_device *hdev,
1355                 const struct hid_device_id *id)
1356 {
1357         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
1358         struct usb_device *dev = interface_to_usbdev(intf);
1359         struct wacom *wacom;
1360         struct wacom_wac *wacom_wac;
1361         struct wacom_features *features;
1362         int error;
1363         unsigned int connect_mask = HID_CONNECT_HIDRAW;
1364
1365         if (!id->driver_data)
1366                 return -EINVAL;
1367
1368         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1369
1370         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1371         if (!wacom)
1372                 return -ENOMEM;
1373
1374         hid_set_drvdata(hdev, wacom);
1375         wacom->hdev = hdev;
1376
1377         /* ask for the report descriptor to be loaded by HID */
1378         error = hid_parse(hdev);
1379         if (error) {
1380                 hid_err(hdev, "parse failed\n");
1381                 goto fail_parse;
1382         }
1383
1384         wacom_wac = &wacom->wacom_wac;
1385         wacom_wac->features = *((struct wacom_features *)id->driver_data);
1386         features = &wacom_wac->features;
1387         features->pktlen = wacom_compute_pktlen(hdev);
1388         if (features->pktlen > WACOM_PKGLEN_MAX) {
1389                 error = -EINVAL;
1390                 goto fail_pktlen;
1391         }
1392
1393         if (features->check_for_hid_type && features->hid_type != hdev->type) {
1394                 error = -ENODEV;
1395                 goto fail_type;
1396         }
1397
1398         wacom->usbdev = dev;
1399         wacom->intf = intf;
1400         mutex_init(&wacom->lock);
1401         INIT_WORK(&wacom->work, wacom_wireless_work);
1402
1403         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1404                 error = wacom_allocate_inputs(wacom);
1405                 if (error)
1406                         goto fail_allocate_inputs;
1407         }
1408
1409         /* set the default size in case we do not get them from hid */
1410         wacom_set_default_phy(features);
1411
1412         /* Retrieve the physical and logical size for touch devices */
1413         wacom_retrieve_hid_descriptor(hdev, features);
1414
1415         /*
1416          * Intuos5 has no useful data about its touch interface in its
1417          * HID descriptor. If this is the touch interface (PacketSize
1418          * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1419          */
1420         if (features->type >= INTUOS5S && features->type <= INTUOSHT) {
1421                 if (features->pktlen == WACOM_PKGLEN_BBTOUCH3) {
1422                         features->device_type = BTN_TOOL_FINGER;
1423
1424                         features->x_max = 4096;
1425                         features->y_max = 4096;
1426                 } else {
1427                         features->device_type = BTN_TOOL_PEN;
1428                 }
1429         }
1430
1431         /*
1432          * Same thing for Bamboo 3rd gen.
1433          */
1434         if ((features->type == BAMBOO_PT) &&
1435             (features->pktlen == WACOM_PKGLEN_BBTOUCH3) &&
1436             (features->device_type == BTN_TOOL_PEN)) {
1437                 features->device_type = BTN_TOOL_FINGER;
1438
1439                 features->x_max = 4096;
1440                 features->y_max = 4096;
1441         }
1442
1443         if (hdev->bus == BUS_BLUETOOTH)
1444                 features->quirks |= WACOM_QUIRK_BATTERY;
1445
1446         wacom_setup_device_quirks(features);
1447
1448         /* set unit to "100th of a mm" for devices not reported by HID */
1449         if (!features->unit) {
1450                 features->unit = 0x11;
1451                 features->unitExpo = -3;
1452         }
1453         wacom_calculate_res(features);
1454
1455         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1456         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1457                 "%s Pad", features->name);
1458
1459         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1460                 /* Append the device type to the name */
1461                 if (features->device_type != BTN_TOOL_FINGER)
1462                         strlcat(wacom_wac->name, " Pen", WACOM_NAME_MAX);
1463                 else if (features->touch_max)
1464                         strlcat(wacom_wac->name, " Finger", WACOM_NAME_MAX);
1465                 else
1466                         strlcat(wacom_wac->name, " Pad", WACOM_NAME_MAX);
1467
1468                 error = wacom_add_shared_data(hdev);
1469                 if (error)
1470                         goto fail_shared_data;
1471         }
1472
1473         if (!(features->quirks & WACOM_QUIRK_MONITOR) &&
1474              (features->quirks & WACOM_QUIRK_BATTERY)) {
1475                 error = wacom_initialize_battery(wacom);
1476                 if (error)
1477                         goto fail_battery;
1478         }
1479
1480         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1481                 error = wacom_register_inputs(wacom);
1482                 if (error)
1483                         goto fail_register_inputs;
1484         }
1485
1486         if (hdev->bus == BUS_BLUETOOTH) {
1487                 error = device_create_file(&hdev->dev, &dev_attr_speed);
1488                 if (error)
1489                         hid_warn(hdev,
1490                                  "can't create sysfs speed attribute err: %d\n",
1491                                  error);
1492         }
1493
1494         if (features->type == HID_GENERIC)
1495                 connect_mask |= HID_CONNECT_DRIVER;
1496
1497         /* Regular HID work starts now */
1498         error = hid_hw_start(hdev, connect_mask);
1499         if (error) {
1500                 hid_err(hdev, "hw start failed\n");
1501                 goto fail_hw_start;
1502         }
1503
1504         /* Note that if query fails it is not a hard failure */
1505         wacom_query_tablet_data(hdev, features);
1506
1507         if (features->quirks & WACOM_QUIRK_MONITOR)
1508                 error = hid_hw_open(hdev);
1509
1510         if (wacom_wac->features.type == INTUOSHT && wacom_wac->features.touch_max) {
1511                 if (wacom_wac->features.device_type == BTN_TOOL_FINGER)
1512                         wacom_wac->shared->touch_input = wacom_wac->input;
1513         }
1514
1515         return 0;
1516
1517 fail_hw_start:
1518         if (hdev->bus == BUS_BLUETOOTH)
1519                 device_remove_file(&hdev->dev, &dev_attr_speed);
1520 fail_register_inputs:
1521         wacom_clean_inputs(wacom);
1522         wacom_destroy_battery(wacom);
1523 fail_battery:
1524         wacom_remove_shared_data(wacom_wac);
1525 fail_shared_data:
1526         wacom_clean_inputs(wacom);
1527 fail_allocate_inputs:
1528 fail_type:
1529 fail_pktlen:
1530 fail_parse:
1531         kfree(wacom);
1532         hid_set_drvdata(hdev, NULL);
1533         return error;
1534 }
1535
1536 static void wacom_remove(struct hid_device *hdev)
1537 {
1538         struct wacom *wacom = hid_get_drvdata(hdev);
1539
1540         hid_hw_stop(hdev);
1541
1542         cancel_work_sync(&wacom->work);
1543         wacom_clean_inputs(wacom);
1544         if (hdev->bus == BUS_BLUETOOTH)
1545                 device_remove_file(&hdev->dev, &dev_attr_speed);
1546         wacom_destroy_battery(wacom);
1547         wacom_remove_shared_data(&wacom->wacom_wac);
1548
1549         hid_set_drvdata(hdev, NULL);
1550         kfree(wacom);
1551 }
1552
1553 #ifdef CONFIG_PM
1554 static int wacom_resume(struct hid_device *hdev)
1555 {
1556         struct wacom *wacom = hid_get_drvdata(hdev);
1557         struct wacom_features *features = &wacom->wacom_wac.features;
1558
1559         mutex_lock(&wacom->lock);
1560
1561         /* switch to wacom mode first */
1562         wacom_query_tablet_data(hdev, features);
1563         wacom_led_control(wacom);
1564
1565         mutex_unlock(&wacom->lock);
1566
1567         return 0;
1568 }
1569
1570 static int wacom_reset_resume(struct hid_device *hdev)
1571 {
1572         return wacom_resume(hdev);
1573 }
1574 #endif /* CONFIG_PM */
1575
1576 static struct hid_driver wacom_driver = {
1577         .name =         "wacom",
1578         .id_table =     wacom_ids,
1579         .probe =        wacom_probe,
1580         .remove =       wacom_remove,
1581         .event =        wacom_wac_event,
1582         .report =       wacom_wac_report,
1583 #ifdef CONFIG_PM
1584         .resume =       wacom_resume,
1585         .reset_resume = wacom_reset_resume,
1586 #endif
1587         .raw_event =    wacom_raw_event,
1588 };
1589 module_hid_driver(wacom_driver);
1590
1591 MODULE_VERSION(DRIVER_VERSION);
1592 MODULE_AUTHOR(DRIVER_AUTHOR);
1593 MODULE_DESCRIPTION(DRIVER_DESC);
1594 MODULE_LICENSE(DRIVER_LICENSE);