drivers/hid/wacom_sys.c

   1 /*
   2  * drivers/input/tablet/wacom_sys.c
   3  *
   4  *  USB Wacom tablet support - system specific code
   5  */
   6
   7 /*
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include "wacom_wac.h"
  15 #include "wacom.h"
  16 #include <linux/input/mt.h>
  17
  18 #define WAC_MSG_RETRIES         5
  19
  20 #define WAC_CMD_WL_LED_CONTROL  0x03
  21 #define WAC_CMD_LED_CONTROL     0x20
  22 #define WAC_CMD_ICON_START      0x21
  23 #define WAC_CMD_ICON_XFER       0x23
  24 #define WAC_CMD_ICON_BT_XFER    0x26
  25 #define WAC_CMD_RETRIES         10
  26
  27 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
  28 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
  29
  30 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
  31                             size_t size, unsigned int retries)
  32 {
  33         int retval;
  34
  35         do {
  36                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  37                                 HID_REQ_GET_REPORT);
  38         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  39
  40         return retval;
  41 }
  42
  43 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
  44                             size_t size, unsigned int retries)
  45 {
  46         int retval;
  47
  48         do {
  49                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  50                                 HID_REQ_SET_REPORT);
  51         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  52
  53         return retval;
  54 }
  55
  56 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
  57                 u8 *raw_data, int size)
  58 {
  59         struct wacom *wacom = hid_get_drvdata(hdev);
  60
  61         if (size > WACOM_PKGLEN_MAX)
  62                 return 1;
  63
  64         memcpy(wacom->wacom_wac.data, raw_data, size);
  65
  66         wacom_wac_irq(&wacom->wacom_wac, size);
  67
  68         return 0;
  69 }
  70
  71 static int wacom_open(struct input_dev *dev)
  72 {
  73         struct wacom *wacom = input_get_drvdata(dev);
  74         int retval;
  75
  76         mutex_lock(&wacom->lock);
  77         retval = hid_hw_open(wacom->hdev);
  78         mutex_unlock(&wacom->lock);
  79
  80         return retval;
  81 }
  82
  83 static void wacom_close(struct input_dev *dev)
  84 {
  85         struct wacom *wacom = input_get_drvdata(dev);
  86
  87         mutex_lock(&wacom->lock);
  88         hid_hw_close(wacom->hdev);
  89         mutex_unlock(&wacom->lock);
  90 }
  91
  92 /*
  93  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
  94  */
  95 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
  96                                unsigned unit, int exponent)
  97 {
  98         struct hid_field field = {
  99                 .logical_maximum = logical_extents,
 100                 .physical_maximum = physical_extents,
 101                 .unit = unit,
 102                 .unit_exponent = exponent,
 103         };
 104
 105         return hidinput_calc_abs_res(&field, ABS_X);
 106 }
 107
 108 static void wacom_feature_mapping(struct hid_device *hdev,
 109                 struct hid_field *field, struct hid_usage *usage)
 110 {
 111         struct wacom *wacom = hid_get_drvdata(hdev);
 112         struct wacom_features *features = &wacom->wacom_wac.features;
 113         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 114         u8 *data;
 115         int ret;
 116
 117         switch (usage->hid) {
 118         case HID_DG_CONTACTMAX:
 119                 /* leave touch_max as is if predefined */
 120                 if (!features->touch_max) {
 121                         /* read manually */
 122                         data = kzalloc(2, GFP_KERNEL);
 123                         if (!data)
 124                                 break;
 125                         data[0] = field->report->id;
 126                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 127                                                 data, 2, 0);
 128                         if (ret == 2)
 129                                 features->touch_max = data[1];
 130                         kfree(data);
 131                 }
 132                 break;
 133         case HID_DG_INPUTMODE:
 134                 /* Ignore if value index is out of bounds. */
 135                 if (usage->usage_index >= field->report_count) {
 136                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 137                         break;
 138                 }
 139
 140                 hid_data->inputmode = field->report->id;
 141                 hid_data->inputmode_index = usage->usage_index;
 142                 break;
 143         }
 144 }
 145
 146 /*
 147  * Interface Descriptor of wacom devices can be incomplete and
 148  * inconsistent so wacom_features table is used to store stylus
 149  * device's packet lengths, various maximum values, and tablet
 150  * resolution based on product ID's.
 151  *
 152  * For devices that contain 2 interfaces, wacom_features table is
 153  * inaccurate for the touch interface.  Since the Interface Descriptor
 154  * for touch interfaces has pretty complete data, this function exists
 155  * to query tablet for this missing information instead of hard coding in
 156  * an additional table.
 157  *
 158  * A typical Interface Descriptor for a stylus will contain a
 159  * boot mouse application collection that is not of interest and this
 160  * function will ignore it.
 161  *
 162  * It also contains a digitizer application collection that also is not
 163  * of interest since any information it contains would be duplicate
 164  * of what is in wacom_features. Usually it defines a report of an array
 165  * of bytes that could be used as max length of the stylus packet returned.
 166  * If it happens to define a Digitizer-Stylus Physical Collection then
 167  * the X and Y logical values contain valid data but it is ignored.
 168  *
 169  * A typical Interface Descriptor for a touch interface will contain a
 170  * Digitizer-Finger Physical Collection which will define both logical
 171  * X/Y maximum as well as the physical size of tablet. Since touch
 172  * interfaces haven't supported pressure or distance, this is enough
 173  * information to override invalid values in the wacom_features table.
 174  *
 175  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 176  * data. We deal with them after returning from this function.
 177  */
 178 static void wacom_usage_mapping(struct hid_device *hdev,
 179                 struct hid_field *field, struct hid_usage *usage)
 180 {
 181         struct wacom *wacom = hid_get_drvdata(hdev);
 182         struct wacom_features *features = &wacom->wacom_wac.features;
 183         bool finger = (field->logical == HID_DG_FINGER) ||
 184                       (field->physical == HID_DG_FINGER);
 185         bool pen = (field->logical == HID_DG_STYLUS) ||
 186                    (field->physical == HID_DG_STYLUS);
 187
 188         /*
 189         * Requiring Stylus Usage will ignore boot mouse
 190         * X/Y values and some cases of invalid Digitizer X/Y
 191         * values commonly reported.
 192         */
 193         if (!pen && !finger)
 194                 return;
 195
 196         /*
 197          * Bamboo models do not support HID_DG_CONTACTMAX.
 198          * And, Bamboo Pen only descriptor contains touch.
 199          */
 200         if (features->type != BAMBOO_PT) {
 201                 /* ISDv4 touch devices at least supports one touch point */
 202                 if (finger && !features->touch_max)
 203                         features->touch_max = 1;
 204         }
 205
 206         switch (usage->hid) {
 207         case HID_GD_X:
 208                 features->x_max = field->logical_maximum;
 209                 if (finger) {
 210                         features->device_type = BTN_TOOL_FINGER;
 211                         features->x_phy = field->physical_maximum;
 212                         if (features->type != BAMBOO_PT) {
 213                                 features->unit = field->unit;
 214                                 features->unitExpo = field->unit_exponent;
 215                         }
 216                 } else {
 217                         features->device_type = BTN_TOOL_PEN;
 218                 }
 219                 break;
 220         case HID_GD_Y:
 221                 features->y_max = field->logical_maximum;
 222                 if (finger) {
 223                         features->y_phy = field->physical_maximum;
 224                         if (features->type != BAMBOO_PT) {
 225                                 features->unit = field->unit;
 226                                 features->unitExpo = field->unit_exponent;
 227                         }
 228                 }
 229                 break;
 230         case HID_DG_TIPPRESSURE:
 231                 if (pen)
 232                         features->pressure_max = field->logical_maximum;
 233                 break;
 234         }
 235
 236         if (features->type == HID_GENERIC)
 237                 wacom_wac_usage_mapping(hdev, field, usage);
 238 }
 239
 240 static void wacom_post_parse_hid(struct hid_device *hdev,
 241                                  struct wacom_features *features)
 242 {
 243         struct wacom *wacom = hid_get_drvdata(hdev);
 244         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 245
 246         if (features->type == HID_GENERIC) {
 247                 /* Any last-minute generic device setup */
 248                 if (features->touch_max > 1) {
 249                         input_mt_init_slots(wacom_wac->input, wacom_wac->features.touch_max,
 250                                     INPUT_MT_DIRECT);
 251                 }
 252         }
 253 }
 254
 255 static void wacom_parse_hid(struct hid_device *hdev,
 256                            struct wacom_features *features)
 257 {
 258         struct hid_report_enum *rep_enum;
 259         struct hid_report *hreport;
 260         int i, j;
 261
 262         /* check features first */
 263         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 264         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 265                 for (i = 0; i < hreport->maxfield; i++) {
 266                         /* Ignore if report count is out of bounds. */
 267                         if (hreport->field[i]->report_count < 1)
 268                                 continue;
 269
 270                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 271                                 wacom_feature_mapping(hdev, hreport->field[i],
 272                                                 hreport->field[i]->usage + j);
 273                         }
 274                 }
 275         }
 276
 277         /* now check the input usages */
 278         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 279         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 280
 281                 if (!hreport->maxfield)
 282                         continue;
 283
 284                 for (i = 0; i < hreport->maxfield; i++)
 285                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 286                                 wacom_usage_mapping(hdev, hreport->field[i],
 287                                                 hreport->field[i]->usage + j);
 288         }
 289
 290         wacom_post_parse_hid(hdev, features);
 291 }
 292
 293 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 294 {
 295         struct wacom *wacom = hid_get_drvdata(hdev);
 296         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 297         struct hid_report *r;
 298         struct hid_report_enum *re;
 299
 300         if (hid_data->inputmode < 0)
 301                 return 0;
 302
 303         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 304         r = re->report_id_hash[hid_data->inputmode];
 305         if (r) {
 306                 r->field[0]->value[hid_data->inputmode_index] = 2;
 307                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 308         }
 309         return 0;
 310 }
 311
 312 static int wacom_set_device_mode(struct hid_device *hdev, int report_id,
 313                 int length, int mode)
 314 {
 315         unsigned char *rep_data;
 316         int error = -ENOMEM, limit = 0;
 317
 318         rep_data = kzalloc(length, GFP_KERNEL);
 319         if (!rep_data)
 320                 return error;
 321
 322         do {
 323                 rep_data[0] = report_id;
 324                 rep_data[1] = mode;
 325
 326                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 327                                          length, 1);
 328                 if (error >= 0)
 329                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 330                                                  rep_data, length, 1);
 331         } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
 332
 333         kfree(rep_data);
 334
 335         return error < 0 ? error : 0;
 336 }
 337
 338 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 339                 struct wacom_features *features)
 340 {
 341         struct wacom *wacom = hid_get_drvdata(hdev);
 342         int ret;
 343         u8 rep_data[2];
 344
 345         switch (features->type) {
 346         case GRAPHIRE_BT:
 347                 rep_data[0] = 0x03;
 348                 rep_data[1] = 0x00;
 349                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 350                                         3);
 351
 352                 if (ret >= 0) {
 353                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 354                         rep_data[1] = 0x00;
 355
 356                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 357                                                 rep_data, 2, 3);
 358
 359                         if (ret >= 0) {
 360                                 wacom->wacom_wac.bt_high_speed = speed;
 361                                 return 0;
 362                         }
 363                 }
 364
 365                 /*
 366                  * Note that if the raw queries fail, it's not a hard failure
 367                  * and it is safe to continue
 368                  */
 369                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 370                          rep_data[0], ret);
 371                 break;
 372         case INTUOS4WL:
 373                 if (speed == 1)
 374                         wacom->wacom_wac.bt_features &= ~0x20;
 375                 else
 376                         wacom->wacom_wac.bt_features |= 0x20;
 377
 378                 rep_data[0] = 0x03;
 379                 rep_data[1] = wacom->wacom_wac.bt_features;
 380
 381                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 382                                         1);
 383                 if (ret >= 0)
 384                         wacom->wacom_wac.bt_high_speed = speed;
 385                 break;
 386         }
 387
 388         return 0;
 389 }
 390
 391 /*
 392  * Switch the tablet into its most-capable mode. Wacom tablets are
 393  * typically configured to power-up in a mode which sends mouse-like
 394  * reports to the OS. To get absolute position, pressure data, etc.
 395  * from the tablet, it is necessary to switch the tablet out of this
 396  * mode and into one which sends the full range of tablet data.
 397  */
 398 static int wacom_query_tablet_data(struct hid_device *hdev,
 399                 struct wacom_features *features)
 400 {
 401         if (hdev->bus == BUS_BLUETOOTH)
 402                 return wacom_bt_query_tablet_data(hdev, 1, features);
 403
 404         if (features->type == HID_GENERIC)
 405                 return wacom_hid_set_device_mode(hdev);
 406
 407         if (features->device_type == BTN_TOOL_FINGER) {
 408                 if (features->type > TABLETPC) {
 409                         /* MT Tablet PC touch */
 410                         return wacom_set_device_mode(hdev, 3, 4, 4);
 411                 }
 412                 else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
 413                         return wacom_set_device_mode(hdev, 18, 3, 2);
 414                 }
 415         } else if (features->device_type == BTN_TOOL_PEN) {
 416                 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
 417                         return wacom_set_device_mode(hdev, 2, 2, 2);
 418                 }
 419         }
 420
 421         return 0;
 422 }
 423
 424 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 425                                          struct wacom_features *features)
 426 {
 427         struct wacom *wacom = hid_get_drvdata(hdev);
 428         struct usb_interface *intf = wacom->intf;
 429
 430         /* default features */
 431         features->device_type = BTN_TOOL_PEN;
 432         features->x_fuzz = 4;
 433         features->y_fuzz = 4;
 434         features->pressure_fuzz = 0;
 435         features->distance_fuzz = 0;
 436
 437         /*
 438          * The wireless device HID is basic and layout conflicts with
 439          * other tablets (monitor and touch interface can look like pen).
 440          * Skip the query for this type and modify defaults based on
 441          * interface number.
 442          */
 443         if (features->type == WIRELESS) {
 444                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
 445                         features->device_type = 0;
 446                 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
 447                         features->device_type = BTN_TOOL_FINGER;
 448                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
 449                 }
 450         }
 451
 452         /* only devices that support touch need to retrieve the info */
 453         if (features->type < BAMBOO_PT)
 454                 return;
 455
 456         wacom_parse_hid(hdev, features);
 457 }
 458
 459 struct wacom_hdev_data {
 460         struct list_head list;
 461         struct kref kref;
 462         struct hid_device *dev;
 463         struct wacom_shared shared;
 464 };
 465
 466 static LIST_HEAD(wacom_udev_list);
 467 static DEFINE_MUTEX(wacom_udev_list_lock);
 468
 469 static bool wacom_are_sibling(struct hid_device *hdev,
 470                 struct hid_device *sibling)
 471 {
 472         struct wacom *wacom = hid_get_drvdata(hdev);
 473         struct wacom_features *features = &wacom->wacom_wac.features;
 474         int vid = features->oVid;
 475         int pid = features->oPid;
 476         int n1,n2;
 477
 478         if (vid == 0 && pid == 0) {
 479                 vid = hdev->vendor;
 480                 pid = hdev->product;
 481         }
 482
 483         if (vid != sibling->vendor || pid != sibling->product)
 484                 return false;
 485
 486         /* Compare the physical path. */
 487         n1 = strrchr(hdev->phys, '.') - hdev->phys;
 488         n2 = strrchr(sibling->phys, '.') - sibling->phys;
 489         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 490                 return false;
 491
 492         return !strncmp(hdev->phys, sibling->phys, n1);
 493 }
 494
 495 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 496 {
 497         struct wacom_hdev_data *data;
 498
 499         list_for_each_entry(data, &wacom_udev_list, list) {
 500                 if (wacom_are_sibling(hdev, data->dev)) {
 501                         kref_get(&data->kref);
 502                         return data;
 503                 }
 504         }
 505
 506         return NULL;
 507 }
 508
 509 static int wacom_add_shared_data(struct hid_device *hdev)
 510 {
 511         struct wacom *wacom = hid_get_drvdata(hdev);
 512         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 513         struct wacom_hdev_data *data;
 514         int retval = 0;
 515
 516         mutex_lock(&wacom_udev_list_lock);
 517
 518         data = wacom_get_hdev_data(hdev);
 519         if (!data) {
 520                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 521                 if (!data) {
 522                         retval = -ENOMEM;
 523                         goto out;
 524                 }
 525
 526                 kref_init(&data->kref);
 527                 data->dev = hdev;
 528                 list_add_tail(&data->list, &wacom_udev_list);
 529         }
 530
 531         wacom_wac->shared = &data->shared;
 532
 533 out:
 534         mutex_unlock(&wacom_udev_list_lock);
 535         return retval;
 536 }
 537
 538 static void wacom_release_shared_data(struct kref *kref)
 539 {
 540         struct wacom_hdev_data *data =
 541                 container_of(kref, struct wacom_hdev_data, kref);
 542
 543         mutex_lock(&wacom_udev_list_lock);
 544         list_del(&data->list);
 545         mutex_unlock(&wacom_udev_list_lock);
 546
 547         kfree(data);
 548 }
 549
 550 static void wacom_remove_shared_data(struct wacom_wac *wacom)
 551 {
 552         struct wacom_hdev_data *data;
 553
 554         if (wacom->shared) {
 555                 data = container_of(wacom->shared, struct wacom_hdev_data, shared);
 556                 kref_put(&data->kref, wacom_release_shared_data);
 557                 wacom->shared = NULL;
 558         }
 559 }
 560
 561 static int wacom_led_control(struct wacom *wacom)
 562 {
 563         unsigned char *buf;
 564         int retval;
 565         unsigned char report_id = WAC_CMD_LED_CONTROL;
 566         int buf_size = 9;
 567
 568         if (wacom->wacom_wac.pid) { /* wireless connected */
 569                 report_id = WAC_CMD_WL_LED_CONTROL;
 570                 buf_size = 13;
 571         }
 572         buf = kzalloc(buf_size, GFP_KERNEL);
 573         if (!buf)
 574                 return -ENOMEM;
 575
 576         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 577             wacom->wacom_wac.features.type <= INTUOSPL) {
 578                 /*
 579                  * Touch Ring and crop mark LED luminance may take on
 580                  * one of four values:
 581                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 582                  */
 583                 int ring_led = wacom->led.select[0] & 0x03;
 584                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 585                 int crop_lum = 0;
 586                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 587
 588                 buf[0] = report_id;
 589                 if (wacom->wacom_wac.pid) {
 590                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 591                                          buf, buf_size, WAC_CMD_RETRIES);
 592                         buf[0] = report_id;
 593                         buf[4] = led_bits;
 594                 } else
 595                         buf[1] = led_bits;
 596         }
 597         else {
 598                 int led = wacom->led.select[0] | 0x4;
 599
 600                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 601                     wacom->wacom_wac.features.type == WACOM_24HD)
 602                         led |= (wacom->led.select[1] << 4) | 0x40;
 603
 604                 buf[0] = report_id;
 605                 buf[1] = led;
 606                 buf[2] = wacom->led.llv;
 607                 buf[3] = wacom->led.hlv;
 608                 buf[4] = wacom->led.img_lum;
 609         }
 610
 611         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 612                                   WAC_CMD_RETRIES);
 613         kfree(buf);
 614
 615         return retval;
 616 }
 617
 618 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 619                 const unsigned len, const void *img)
 620 {
 621         unsigned char *buf;
 622         int i, retval;
 623         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 624
 625         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 626         if (!buf)
 627                 return -ENOMEM;
 628
 629         /* Send 'start' command */
 630         buf[0] = WAC_CMD_ICON_START;
 631         buf[1] = 1;
 632         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 633                                   WAC_CMD_RETRIES);
 634         if (retval < 0)
 635                 goto out;
 636
 637         buf[0] = xfer_id;
 638         buf[1] = button_id & 0x07;
 639         for (i = 0; i < 4; i++) {
 640                 buf[2] = i;
 641                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 642
 643                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 644                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 645                 if (retval < 0)
 646                         break;
 647         }
 648
 649         /* Send 'stop' */
 650         buf[0] = WAC_CMD_ICON_START;
 651         buf[1] = 0;
 652         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 653                          WAC_CMD_RETRIES);
 654
 655 out:
 656         kfree(buf);
 657         return retval;
 658 }
 659
 660 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 661                                       const char *buf, size_t count)
 662 {
 663         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 664         struct wacom *wacom = hid_get_drvdata(hdev);
 665         unsigned int id;
 666         int err;
 667
 668         err = kstrtouint(buf, 10, &id);
 669         if (err)
 670                 return err;
 671
 672         mutex_lock(&wacom->lock);
 673
 674         wacom->led.select[set_id] = id & 0x3;
 675         err = wacom_led_control(wacom);
 676
 677         mutex_unlock(&wacom->lock);
 678
 679         return err < 0 ? err : count;
 680 }
 681
 682 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 683 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 684         struct device_attribute *attr, const char *buf, size_t count)   \
 685 {                                                                       \
 686         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 687 }                                                                       \
 688 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 689         struct device_attribute *attr, char *buf)                       \
 690 {                                                                       \
 691         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 692         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 693         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 694                          wacom->led.select[SET_ID]);                    \
 695 }                                                                       \
 696 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 697                     wacom_led##SET_ID##_select_show,                    \
 698                     wacom_led##SET_ID##_select_store)
 699
 700 DEVICE_LED_SELECT_ATTR(0);
 701 DEVICE_LED_SELECT_ATTR(1);
 702
 703 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 704                                      const char *buf, size_t count)
 705 {
 706         unsigned int value;
 707         int err;
 708
 709         err = kstrtouint(buf, 10, &value);
 710         if (err)
 711                 return err;
 712
 713         mutex_lock(&wacom->lock);
 714
 715         *dest = value & 0x7f;
 716         err = wacom_led_control(wacom);
 717
 718         mutex_unlock(&wacom->lock);
 719
 720         return err < 0 ? err : count;
 721 }
 722
 723 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 724 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 725         struct device_attribute *attr, const char *buf, size_t count)   \
 726 {                                                                       \
 727         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 728         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 729                                                                         \
 730         return wacom_luminance_store(wacom, &wacom->led.field,          \
 731                                      buf, count);                       \
 732 }                                                                       \
 733 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 734         struct device_attribute *attr, char *buf)                       \
 735 {                                                                       \
 736         struct wacom *wacom = dev_get_drvdata(dev);                     \
 737         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 738 }                                                                       \
 739 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 740                    wacom_##name##_luminance_show,                       \
 741                    wacom_##name##_luminance_store)
 742
 743 DEVICE_LUMINANCE_ATTR(status0, llv);
 744 DEVICE_LUMINANCE_ATTR(status1, hlv);
 745 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 746
 747 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 748                                         const char *buf, size_t count)
 749 {
 750         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 751         struct wacom *wacom = hid_get_drvdata(hdev);
 752         int err;
 753         unsigned len;
 754         u8 xfer_id;
 755
 756         if (hdev->bus == BUS_BLUETOOTH) {
 757                 len = 256;
 758                 xfer_id = WAC_CMD_ICON_BT_XFER;
 759         } else {
 760                 len = 1024;
 761                 xfer_id = WAC_CMD_ICON_XFER;
 762         }
 763
 764         if (count != len)
 765                 return -EINVAL;
 766
 767         mutex_lock(&wacom->lock);
 768
 769         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
 770
 771         mutex_unlock(&wacom->lock);
 772
 773         return err < 0 ? err : count;
 774 }
 775
 776 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 777 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 778         struct device_attribute *attr, const char *buf, size_t count)   \
 779 {                                                                       \
 780         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 781 }                                                                       \
 782 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
 783                    NULL, wacom_btnimg##BUTTON_ID##_store)
 784
 785 DEVICE_BTNIMG_ATTR(0);
 786 DEVICE_BTNIMG_ATTR(1);
 787 DEVICE_BTNIMG_ATTR(2);
 788 DEVICE_BTNIMG_ATTR(3);
 789 DEVICE_BTNIMG_ATTR(4);
 790 DEVICE_BTNIMG_ATTR(5);
 791 DEVICE_BTNIMG_ATTR(6);
 792 DEVICE_BTNIMG_ATTR(7);
 793
 794 static struct attribute *cintiq_led_attrs[] = {
 795         &dev_attr_status_led0_select.attr,
 796         &dev_attr_status_led1_select.attr,
 797         NULL
 798 };
 799
 800 static struct attribute_group cintiq_led_attr_group = {
 801         .name = "wacom_led",
 802         .attrs = cintiq_led_attrs,
 803 };
 804
 805 static struct attribute *intuos4_led_attrs[] = {
 806         &dev_attr_status0_luminance.attr,
 807         &dev_attr_status1_luminance.attr,
 808         &dev_attr_status_led0_select.attr,
 809         &dev_attr_buttons_luminance.attr,
 810         &dev_attr_button0_rawimg.attr,
 811         &dev_attr_button1_rawimg.attr,
 812         &dev_attr_button2_rawimg.attr,
 813         &dev_attr_button3_rawimg.attr,
 814         &dev_attr_button4_rawimg.attr,
 815         &dev_attr_button5_rawimg.attr,
 816         &dev_attr_button6_rawimg.attr,
 817         &dev_attr_button7_rawimg.attr,
 818         NULL
 819 };
 820
 821 static struct attribute_group intuos4_led_attr_group = {
 822         .name = "wacom_led",
 823         .attrs = intuos4_led_attrs,
 824 };
 825
 826 static struct attribute *intuos5_led_attrs[] = {
 827         &dev_attr_status0_luminance.attr,
 828         &dev_attr_status_led0_select.attr,
 829         NULL
 830 };
 831
 832 static struct attribute_group intuos5_led_attr_group = {
 833         .name = "wacom_led",
 834         .attrs = intuos5_led_attrs,
 835 };
 836
 837 static int wacom_initialize_leds(struct wacom *wacom)
 838 {
 839         int error;
 840
 841         /* Initialize default values */
 842         switch (wacom->wacom_wac.features.type) {
 843         case INTUOS4S:
 844         case INTUOS4:
 845         case INTUOS4WL:
 846         case INTUOS4L:
 847                 wacom->led.select[0] = 0;
 848                 wacom->led.select[1] = 0;
 849                 wacom->led.llv = 10;
 850                 wacom->led.hlv = 20;
 851                 wacom->led.img_lum = 10;
 852                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 853                                            &intuos4_led_attr_group);
 854                 break;
 855
 856         case WACOM_24HD:
 857         case WACOM_21UX2:
 858                 wacom->led.select[0] = 0;
 859                 wacom->led.select[1] = 0;
 860                 wacom->led.llv = 0;
 861                 wacom->led.hlv = 0;
 862                 wacom->led.img_lum = 0;
 863
 864                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 865                                            &cintiq_led_attr_group);
 866                 break;
 867
 868         case INTUOS5S:
 869         case INTUOS5:
 870         case INTUOS5L:
 871         case INTUOSPS:
 872         case INTUOSPM:
 873         case INTUOSPL:
 874                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) {
 875                         wacom->led.select[0] = 0;
 876                         wacom->led.select[1] = 0;
 877                         wacom->led.llv = 32;
 878                         wacom->led.hlv = 0;
 879                         wacom->led.img_lum = 0;
 880
 881                         error = sysfs_create_group(&wacom->hdev->dev.kobj,
 882                                                   &intuos5_led_attr_group);
 883                 } else
 884                         return 0;
 885                 break;
 886
 887         default:
 888                 return 0;
 889         }
 890
 891         if (error) {
 892                 hid_err(wacom->hdev,
 893                         "cannot create sysfs group err: %d\n", error);
 894                 return error;
 895         }
 896         wacom_led_control(wacom);
 897         wacom->led_initialized = true;
 898
 899         return 0;
 900 }
 901
 902 static void wacom_destroy_leds(struct wacom *wacom)
 903 {
 904         if (!wacom->led_initialized)
 905                 return;
 906
 907         wacom->led_initialized = false;
 908
 909         switch (wacom->wacom_wac.features.type) {
 910         case INTUOS4S:
 911         case INTUOS4:
 912         case INTUOS4WL:
 913         case INTUOS4L:
 914                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 915                                    &intuos4_led_attr_group);
 916                 break;
 917
 918         case WACOM_24HD:
 919         case WACOM_21UX2:
 920                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 921                                    &cintiq_led_attr_group);
 922                 break;
 923
 924         case INTUOS5S:
 925         case INTUOS5:
 926         case INTUOS5L:
 927         case INTUOSPS:
 928         case INTUOSPM:
 929         case INTUOSPL:
 930                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN)
 931                         sysfs_remove_group(&wacom->hdev->dev.kobj,
 932                                            &intuos5_led_attr_group);
 933                 break;
 934         }
 935 }
 936
 937 static enum power_supply_property wacom_battery_props[] = {
 938         POWER_SUPPLY_PROP_STATUS,
 939         POWER_SUPPLY_PROP_SCOPE,
 940         POWER_SUPPLY_PROP_CAPACITY
 941 };
 942
 943 static enum power_supply_property wacom_ac_props[] = {
 944         POWER_SUPPLY_PROP_PRESENT,
 945         POWER_SUPPLY_PROP_ONLINE,
 946         POWER_SUPPLY_PROP_SCOPE,
 947 };
 948
 949 static int wacom_battery_get_property(struct power_supply *psy,
 950                                       enum power_supply_property psp,
 951                                       union power_supply_propval *val)
 952 {
 953         struct wacom *wacom = container_of(psy, struct wacom, battery);
 954         int ret = 0;
 955
 956         switch (psp) {
 957                 case POWER_SUPPLY_PROP_SCOPE:
 958                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 959                         break;
 960                 case POWER_SUPPLY_PROP_CAPACITY:
 961                         val->intval =
 962                                 wacom->wacom_wac.battery_capacity;
 963                         break;
 964                 case POWER_SUPPLY_PROP_STATUS:
 965                         if (wacom->wacom_wac.bat_charging)
 966                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 967                         else if (wacom->wacom_wac.battery_capacity == 100 &&
 968                                     wacom->wacom_wac.ps_connected)
 969                                 val->intval = POWER_SUPPLY_STATUS_FULL;
 970                         else
 971                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 972                         break;
 973                 default:
 974                         ret = -EINVAL;
 975                         break;
 976         }
 977
 978         return ret;
 979 }
 980
 981 static int wacom_ac_get_property(struct power_supply *psy,
 982                                 enum power_supply_property psp,
 983                                 union power_supply_propval *val)
 984 {
 985         struct wacom *wacom = container_of(psy, struct wacom, ac);
 986         int ret = 0;
 987
 988         switch (psp) {
 989         case POWER_SUPPLY_PROP_PRESENT:
 990                 /* fall through */
 991         case POWER_SUPPLY_PROP_ONLINE:
 992                 val->intval = wacom->wacom_wac.ps_connected;
 993                 break;
 994         case POWER_SUPPLY_PROP_SCOPE:
 995                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 996                 break;
 997         default:
 998                 ret = -EINVAL;
 999                 break;
1000         }
1001         return ret;
1002 }
1003
1004 static int wacom_initialize_battery(struct wacom *wacom)
1005 {
1006         static atomic_t battery_no = ATOMIC_INIT(0);
1007         int error;
1008         unsigned long n;
1009
1010         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {
1011                 n = atomic_inc_return(&battery_no) - 1;
1012
1013                 wacom->battery.properties = wacom_battery_props;
1014                 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
1015                 wacom->battery.get_property = wacom_battery_get_property;
1016                 sprintf(wacom->wacom_wac.bat_name, "wacom_battery_%ld", n);
1017                 wacom->battery.name = wacom->wacom_wac.bat_name;
1018                 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1019                 wacom->battery.use_for_apm = 0;
1020
1021                 wacom->ac.properties = wacom_ac_props;
1022                 wacom->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
1023                 wacom->ac.get_property = wacom_ac_get_property;
1024                 sprintf(wacom->wacom_wac.ac_name, "wacom_ac_%ld", n);
1025                 wacom->ac.name = wacom->wacom_wac.ac_name;
1026                 wacom->ac.type = POWER_SUPPLY_TYPE_MAINS;
1027                 wacom->ac.use_for_apm = 0;
1028
1029                 error = power_supply_register(&wacom->hdev->dev,
1030                                               &wacom->battery);
1031                 if (error)
1032                         return error;
1033
1034                 power_supply_powers(&wacom->battery, &wacom->hdev->dev);
1035
1036                 error = power_supply_register(&wacom->hdev->dev, &wacom->ac);
1037                 if (error) {
1038                         power_supply_unregister(&wacom->battery);
1039                         return error;
1040                 }
1041
1042                 power_supply_powers(&wacom->ac, &wacom->hdev->dev);
1043         }
1044
1045         return 0;
1046 }
1047
1048 static void wacom_destroy_battery(struct wacom *wacom)
1049 {
1050         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1051              wacom->battery.dev) {
1052                 power_supply_unregister(&wacom->battery);
1053                 wacom->battery.dev = NULL;
1054                 power_supply_unregister(&wacom->ac);
1055                 wacom->ac.dev = NULL;
1056         }
1057 }
1058
1059 static ssize_t wacom_show_speed(struct device *dev,
1060                                 struct device_attribute
1061                                 *attr, char *buf)
1062 {
1063         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1064         struct wacom *wacom = hid_get_drvdata(hdev);
1065
1066         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1067 }
1068
1069 static ssize_t wacom_store_speed(struct device *dev,
1070                                 struct device_attribute *attr,
1071                                 const char *buf, size_t count)
1072 {
1073         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1074         struct wacom *wacom = hid_get_drvdata(hdev);
1075         u8 new_speed;
1076
1077         if (kstrtou8(buf, 0, &new_speed))
1078                 return -EINVAL;
1079
1080         if (new_speed != 0 && new_speed != 1)
1081                 return -EINVAL;
1082
1083         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1084
1085         return count;
1086 }
1087
1088 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1089                 wacom_show_speed, wacom_store_speed);
1090
1091 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1092 {
1093         struct input_dev *input_dev;
1094         struct hid_device *hdev = wacom->hdev;
1095         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1096
1097         input_dev = input_allocate_device();
1098         if (!input_dev)
1099                 return NULL;
1100
1101         input_dev->name = wacom_wac->name;
1102         input_dev->phys = hdev->phys;
1103         input_dev->dev.parent = &hdev->dev;
1104         input_dev->open = wacom_open;
1105         input_dev->close = wacom_close;
1106         input_dev->uniq = hdev->uniq;
1107         input_dev->id.bustype = hdev->bus;
1108         input_dev->id.vendor  = hdev->vendor;
1109         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1110         input_dev->id.version = hdev->version;
1111         input_set_drvdata(input_dev, wacom);
1112
1113         return input_dev;
1114 }
1115
1116 static void wacom_free_inputs(struct wacom *wacom)
1117 {
1118         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1119
1120         if (wacom_wac->input)
1121                 input_free_device(wacom_wac->input);
1122         if (wacom_wac->pad_input)
1123                 input_free_device(wacom_wac->pad_input);
1124         wacom_wac->input = NULL;
1125         wacom_wac->pad_input = NULL;
1126 }
1127
1128 static int wacom_allocate_inputs(struct wacom *wacom)
1129 {
1130         struct input_dev *input_dev, *pad_input_dev;
1131         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1132
1133         input_dev = wacom_allocate_input(wacom);
1134         pad_input_dev = wacom_allocate_input(wacom);
1135         if (!input_dev || !pad_input_dev) {
1136                 wacom_free_inputs(wacom);
1137                 return -ENOMEM;
1138         }
1139
1140         wacom_wac->input = input_dev;
1141         wacom_wac->pad_input = pad_input_dev;
1142         wacom_wac->pad_input->name = wacom_wac->pad_name;
1143
1144         return 0;
1145 }
1146
1147 static void wacom_clean_inputs(struct wacom *wacom)
1148 {
1149         if (wacom->wacom_wac.input) {
1150                 if (wacom->wacom_wac.input_registered)
1151                         input_unregister_device(wacom->wacom_wac.input);
1152                 else
1153                         input_free_device(wacom->wacom_wac.input);
1154         }
1155         if (wacom->wacom_wac.pad_input) {
1156                 if (wacom->wacom_wac.pad_registered)
1157                         input_unregister_device(wacom->wacom_wac.pad_input);
1158                 else
1159                         input_free_device(wacom->wacom_wac.pad_input);
1160         }
1161         wacom->wacom_wac.input = NULL;
1162         wacom->wacom_wac.pad_input = NULL;
1163         wacom_destroy_leds(wacom);
1164 }
1165
1166 static int wacom_register_inputs(struct wacom *wacom)
1167 {
1168         struct input_dev *input_dev, *pad_input_dev;
1169         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1170         int error;
1171
1172         input_dev = wacom_wac->input;
1173         pad_input_dev = wacom_wac->pad_input;
1174
1175         if (!input_dev || !pad_input_dev)
1176                 return -EINVAL;
1177
1178         error = wacom_setup_pentouch_input_capabilities(input_dev, wacom_wac);
1179         if (!error) {
1180                 error = input_register_device(input_dev);
1181                 if (error)
1182                         return error;
1183                 wacom_wac->input_registered = true;
1184         }
1185
1186         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1187         if (error) {
1188                 /* no pad in use on this interface */
1189                 input_free_device(pad_input_dev);
1190                 wacom_wac->pad_input = NULL;
1191                 pad_input_dev = NULL;
1192         } else {
1193                 error = input_register_device(pad_input_dev);
1194                 if (error)
1195                         goto fail_register_pad_input;
1196                 wacom_wac->pad_registered = true;
1197
1198                 error = wacom_initialize_leds(wacom);
1199                 if (error)
1200                         goto fail_leds;
1201         }
1202
1203         return 0;
1204
1205 fail_leds:
1206         input_unregister_device(pad_input_dev);
1207         pad_input_dev = NULL;
1208         wacom_wac->pad_registered = false;
1209 fail_register_pad_input:
1210         input_unregister_device(input_dev);
1211         wacom_wac->input = NULL;
1212         wacom_wac->input_registered = false;
1213         return error;
1214 }
1215
1216 static void wacom_wireless_work(struct work_struct *work)
1217 {
1218         struct wacom *wacom = container_of(work, struct wacom, work);
1219         struct usb_device *usbdev = wacom->usbdev;
1220         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1221         struct hid_device *hdev1, *hdev2;
1222         struct wacom *wacom1, *wacom2;
1223         struct wacom_wac *wacom_wac1, *wacom_wac2;
1224         int error;
1225
1226         /*
1227          * Regardless if this is a disconnect or a new tablet,
1228          * remove any existing input and battery devices.
1229          */
1230
1231         wacom_destroy_battery(wacom);
1232
1233         /* Stylus interface */
1234         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
1235         wacom1 = hid_get_drvdata(hdev1);
1236         wacom_wac1 = &(wacom1->wacom_wac);
1237         wacom_clean_inputs(wacom1);
1238
1239         /* Touch interface */
1240         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
1241         wacom2 = hid_get_drvdata(hdev2);
1242         wacom_wac2 = &(wacom2->wacom_wac);
1243         wacom_clean_inputs(wacom2);
1244
1245         if (wacom_wac->pid == 0) {
1246                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
1247                 wacom_wac1->shared->type = 0;
1248         } else {
1249                 const struct hid_device_id *id = wacom_ids;
1250
1251                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
1252                          wacom_wac->pid);
1253
1254                 while (id->bus) {
1255                         if (id->vendor == USB_VENDOR_ID_WACOM &&
1256                             id->product == wacom_wac->pid)
1257                                 break;
1258                         id++;
1259                 }
1260
1261                 if (!id->bus) {
1262                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
1263                         return;
1264                 }
1265
1266                 /* Stylus interface */
1267                 wacom_wac1->features =
1268                         *((struct wacom_features *)id->driver_data);
1269                 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1270                 snprintf(wacom_wac1->name, WACOM_NAME_MAX, "%s (WL) Pen",
1271                          wacom_wac1->features.name);
1272                 snprintf(wacom_wac1->pad_name, WACOM_NAME_MAX, "%s (WL) Pad",
1273                          wacom_wac1->features.name);
1274                 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1275                 wacom_wac1->shared->type = wacom_wac1->features.type;
1276                 wacom_wac1->pid = wacom_wac->pid;
1277                 error = wacom_allocate_inputs(wacom1) ||
1278                         wacom_register_inputs(wacom1);
1279                 if (error)
1280                         goto fail;
1281
1282                 /* Touch interface */
1283                 if (wacom_wac1->features.touch_max ||
1284                     wacom_wac1->features.type == INTUOSHT) {
1285                         wacom_wac2->features =
1286                                 *((struct wacom_features *)id->driver_data);
1287                         wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1288                         wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1289                         wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1290                         if (wacom_wac2->features.touch_max)
1291                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1292                                          "%s (WL) Finger",wacom_wac2->features.name);
1293                         else
1294                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1295                                          "%s (WL) Pad",wacom_wac2->features.name);
1296                         snprintf(wacom_wac2->pad_name, WACOM_NAME_MAX,
1297                                  "%s (WL) Pad", wacom_wac2->features.name);
1298                         wacom_wac2->pid = wacom_wac->pid;
1299                         error = wacom_allocate_inputs(wacom2) ||
1300                                 wacom_register_inputs(wacom2);
1301                         if (error)
1302                                 goto fail;
1303
1304                         if (wacom_wac1->features.type == INTUOSHT &&
1305                             wacom_wac1->features.touch_max)
1306                                 wacom_wac->shared->touch_input = wacom_wac2->input;
1307                 }
1308
1309                 error = wacom_initialize_battery(wacom);
1310                 if (error)
1311                         goto fail;
1312         }
1313
1314         return;
1315
1316 fail:
1317         wacom_clean_inputs(wacom1);
1318         wacom_clean_inputs(wacom2);
1319         return;
1320 }
1321
1322 /*
1323  * Not all devices report physical dimensions from HID.
1324  * Compute the default from hardcoded logical dimension
1325  * and resolution before driver overwrites them.
1326  */
1327 static void wacom_set_default_phy(struct wacom_features *features)
1328 {
1329         if (features->x_resolution) {
1330                 features->x_phy = (features->x_max * 100) /
1331                                         features->x_resolution;
1332                 features->y_phy = (features->y_max * 100) /
1333                                         features->y_resolution;
1334         }
1335 }
1336
1337 static void wacom_calculate_res(struct wacom_features *features)
1338 {
1339         features->x_resolution = wacom_calc_hid_res(features->x_max,
1340                                                     features->x_phy,
1341                                                     features->unit,
1342                                                     features->unitExpo);
1343         features->y_resolution = wacom_calc_hid_res(features->y_max,
1344                                                     features->y_phy,
1345                                                     features->unit,
1346                                                     features->unitExpo);
1347 }
1348
1349 static int wacom_hid_report_len(struct hid_report *report)
1350 {
1351         /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
1352         return ((report->size - 1) >> 3) + 1 + (report->id > 0);
1353 }
1354
1355 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1356 {
1357         struct hid_report_enum *report_enum;
1358         struct hid_report *report;
1359         size_t size = 0;
1360
1361         report_enum = hdev->report_enum + HID_INPUT_REPORT;
1362
1363         list_for_each_entry(report, &report_enum->report_list, list) {
1364                 size_t report_size = wacom_hid_report_len(report);
1365                 if (report_size > size)
1366                         size = report_size;
1367         }
1368
1369         return size;
1370 }
1371
1372 static int wacom_probe(struct hid_device *hdev,
1373                 const struct hid_device_id *id)
1374 {
1375         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
1376         struct usb_device *dev = interface_to_usbdev(intf);
1377         struct wacom *wacom;
1378         struct wacom_wac *wacom_wac;
1379         struct wacom_features *features;
1380         int error;
1381         unsigned int connect_mask = HID_CONNECT_HIDRAW;
1382
1383         if (!id->driver_data)
1384                 return -EINVAL;
1385
1386         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1387
1388         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1389         if (!wacom)
1390                 return -ENOMEM;
1391
1392         hid_set_drvdata(hdev, wacom);
1393         wacom->hdev = hdev;
1394
1395         /* ask for the report descriptor to be loaded by HID */
1396         error = hid_parse(hdev);
1397         if (error) {
1398                 hid_err(hdev, "parse failed\n");
1399                 goto fail_parse;
1400         }
1401
1402         wacom_wac = &wacom->wacom_wac;
1403         wacom_wac->features = *((struct wacom_features *)id->driver_data);
1404         features = &wacom_wac->features;
1405         features->pktlen = wacom_compute_pktlen(hdev);
1406         if (features->pktlen > WACOM_PKGLEN_MAX) {
1407                 error = -EINVAL;
1408                 goto fail_pktlen;
1409         }
1410
1411         if (features->check_for_hid_type && features->hid_type != hdev->type) {
1412                 error = -ENODEV;
1413                 goto fail_type;
1414         }
1415
1416         wacom->usbdev = dev;
1417         wacom->intf = intf;
1418         mutex_init(&wacom->lock);
1419         INIT_WORK(&wacom->work, wacom_wireless_work);
1420
1421         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1422                 error = wacom_allocate_inputs(wacom);
1423                 if (error)
1424                         goto fail_allocate_inputs;
1425         }
1426
1427         /* set the default size in case we do not get them from hid */
1428         wacom_set_default_phy(features);
1429
1430         /* Retrieve the physical and logical size for touch devices */
1431         wacom_retrieve_hid_descriptor(hdev, features);
1432
1433         /*
1434          * Intuos5 has no useful data about its touch interface in its
1435          * HID descriptor. If this is the touch interface (PacketSize
1436          * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1437          */
1438         if (features->type >= INTUOS5S && features->type <= INTUOSHT) {
1439                 if (features->pktlen == WACOM_PKGLEN_BBTOUCH3) {
1440                         features->device_type = BTN_TOOL_FINGER;
1441
1442                         features->x_max = 4096;
1443                         features->y_max = 4096;
1444                 } else {
1445                         features->device_type = BTN_TOOL_PEN;
1446                 }
1447         }
1448
1449         /*
1450          * Same thing for Bamboo 3rd gen.
1451          */
1452         if ((features->type == BAMBOO_PT) &&
1453             (features->pktlen == WACOM_PKGLEN_BBTOUCH3) &&
1454             (features->device_type == BTN_TOOL_PEN)) {
1455                 features->device_type = BTN_TOOL_FINGER;
1456
1457                 features->x_max = 4096;
1458                 features->y_max = 4096;
1459         }
1460
1461         if (hdev->bus == BUS_BLUETOOTH)
1462                 features->quirks |= WACOM_QUIRK_BATTERY;
1463
1464         wacom_setup_device_quirks(features);
1465
1466         /* set unit to "100th of a mm" for devices not reported by HID */
1467         if (!features->unit) {
1468                 features->unit = 0x11;
1469                 features->unitExpo = -3;
1470         }
1471         wacom_calculate_res(features);
1472
1473         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1474         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1475                 "%s Pad", features->name);
1476
1477         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1478                 /* Append the device type to the name */
1479                 if (features->device_type != BTN_TOOL_FINGER)
1480                         strlcat(wacom_wac->name, " Pen", WACOM_NAME_MAX);
1481                 else if (features->touch_max)
1482                         strlcat(wacom_wac->name, " Finger", WACOM_NAME_MAX);
1483                 else
1484                         strlcat(wacom_wac->name, " Pad", WACOM_NAME_MAX);
1485
1486                 error = wacom_add_shared_data(hdev);
1487                 if (error)
1488                         goto fail_shared_data;
1489         }
1490
1491         if (!(features->quirks & WACOM_QUIRK_MONITOR) &&
1492              (features->quirks & WACOM_QUIRK_BATTERY)) {
1493                 error = wacom_initialize_battery(wacom);
1494                 if (error)
1495                         goto fail_battery;
1496         }
1497
1498         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1499                 error = wacom_register_inputs(wacom);
1500                 if (error)
1501                         goto fail_register_inputs;
1502         }
1503
1504         if (hdev->bus == BUS_BLUETOOTH) {
1505                 error = device_create_file(&hdev->dev, &dev_attr_speed);
1506                 if (error)
1507                         hid_warn(hdev,
1508                                  "can't create sysfs speed attribute err: %d\n",
1509                                  error);
1510         }
1511
1512         if (features->type == HID_GENERIC)
1513                 connect_mask |= HID_CONNECT_DRIVER;
1514
1515         /* Regular HID work starts now */
1516         error = hid_hw_start(hdev, connect_mask);
1517         if (error) {
1518                 hid_err(hdev, "hw start failed\n");
1519                 goto fail_hw_start;
1520         }
1521
1522         /* Note that if query fails it is not a hard failure */
1523         wacom_query_tablet_data(hdev, features);
1524
1525         if (features->quirks & WACOM_QUIRK_MONITOR)
1526                 error = hid_hw_open(hdev);
1527
1528         if (wacom_wac->features.type == INTUOSHT && wacom_wac->features.touch_max) {
1529                 if (wacom_wac->features.device_type == BTN_TOOL_FINGER)
1530                         wacom_wac->shared->touch_input = wacom_wac->input;
1531         }
1532
1533         return 0;
1534
1535 fail_hw_start:
1536         if (hdev->bus == BUS_BLUETOOTH)
1537                 device_remove_file(&hdev->dev, &dev_attr_speed);
1538 fail_register_inputs:
1539         wacom_clean_inputs(wacom);
1540         wacom_destroy_battery(wacom);
1541 fail_battery:
1542         wacom_remove_shared_data(wacom_wac);
1543 fail_shared_data:
1544         wacom_clean_inputs(wacom);
1545 fail_allocate_inputs:
1546 fail_type:
1547 fail_pktlen:
1548 fail_parse:
1549         kfree(wacom);
1550         hid_set_drvdata(hdev, NULL);
1551         return error;
1552 }
1553
1554 static void wacom_remove(struct hid_device *hdev)
1555 {
1556         struct wacom *wacom = hid_get_drvdata(hdev);
1557
1558         hid_hw_stop(hdev);
1559
1560         cancel_work_sync(&wacom->work);
1561         wacom_clean_inputs(wacom);
1562         if (hdev->bus == BUS_BLUETOOTH)
1563                 device_remove_file(&hdev->dev, &dev_attr_speed);
1564         wacom_destroy_battery(wacom);
1565         wacom_remove_shared_data(&wacom->wacom_wac);
1566
1567         hid_set_drvdata(hdev, NULL);
1568         kfree(wacom);
1569 }
1570
1571 #ifdef CONFIG_PM
1572 static int wacom_resume(struct hid_device *hdev)
1573 {
1574         struct wacom *wacom = hid_get_drvdata(hdev);
1575         struct wacom_features *features = &wacom->wacom_wac.features;
1576
1577         mutex_lock(&wacom->lock);
1578
1579         /* switch to wacom mode first */
1580         wacom_query_tablet_data(hdev, features);
1581         wacom_led_control(wacom);
1582
1583         mutex_unlock(&wacom->lock);
1584
1585         return 0;
1586 }
1587
1588 static int wacom_reset_resume(struct hid_device *hdev)
1589 {
1590         return wacom_resume(hdev);
1591 }
1592 #endif /* CONFIG_PM */
1593
1594 static struct hid_driver wacom_driver = {
1595         .name =         "wacom",
1596         .id_table =     wacom_ids,
1597         .probe =        wacom_probe,
1598         .remove =       wacom_remove,
1599         .event =        wacom_wac_event,
1600         .report =       wacom_wac_report,
1601 #ifdef CONFIG_PM
1602         .resume =       wacom_resume,
1603         .reset_resume = wacom_reset_resume,
1604 #endif
1605         .raw_event =    wacom_raw_event,
1606 };
1607 module_hid_driver(wacom_driver);
1608
1609 MODULE_VERSION(DRIVER_VERSION);
1610 MODULE_AUTHOR(DRIVER_AUTHOR);
1611 MODULE_DESCRIPTION(DRIVER_DESC);
1612 MODULE_LICENSE(DRIVER_LICENSE);