drivers/hid/hid-roccat-kone.c

   1 /*
   2  * Roccat Kone driver for Linux
   3  *
   4  * Copyright (c) 2010 Stefan Achatz <erazor_de@users.sourceforge.net>
   5  */
   6
   7 /*
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the Free
  10  * Software Foundation; either version 2 of the License, or (at your option)
  11  * any later version.
  12  */
  13
  14 /*
  15  * Roccat Kone is a gamer mouse which consists of a mouse part and a keyboard
  16  * part. The keyboard part enables the mouse to execute stored macros with mixed
  17  * key- and button-events.
  18  *
  19  * TODO implement on-the-fly polling-rate change
  20  *      The windows driver has the ability to change the polling rate of the
  21  *      device on the press of a mousebutton.
  22  *      Is it possible to remove and reinstall the urb in raw-event- or any
  23  *      other handler, or to defer this action to be executed somewhere else?
  24  *
  25  * TODO is it possible to overwrite group for sysfs attributes via udev?
  26  */
  27
  28 #include <linux/device.h>
  29 #include <linux/input.h>
  30 #include <linux/hid.h>
  31 #include <linux/module.h>
  32 #include <linux/slab.h>
  33 #include <linux/hid-roccat.h>
  34 #include "hid-ids.h"
  35 #include "hid-roccat-common.h"
  36 #include "hid-roccat-kone.h"
  37
  38 static uint profile_numbers[5] = {0, 1, 2, 3, 4};
  39
  40 static void kone_profile_activated(struct kone_device *kone, uint new_profile)
  41 {
  42         kone->actual_profile = new_profile;
  43         kone->actual_dpi = kone->profiles[new_profile - 1].startup_dpi;
  44 }
  45
  46 static void kone_profile_report(struct kone_device *kone, uint new_profile)
  47 {
  48         struct kone_roccat_report roccat_report;
  49         roccat_report.event = kone_mouse_event_switch_profile;
  50         roccat_report.value = new_profile;
  51         roccat_report.key = 0;
  52         roccat_report_event(kone->chrdev_minor, (uint8_t *)&roccat_report);
  53 }
  54
  55 static int kone_receive(struct usb_device *usb_dev, uint usb_command,
  56                 void *data, uint size)
  57 {
  58         char *buf;
  59         int len;
  60
  61         buf = kmalloc(size, GFP_KERNEL);
  62         if (buf == NULL)
  63                 return -ENOMEM;
  64
  65         len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
  66                         HID_REQ_GET_REPORT,
  67                         USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
  68                         usb_command, 0, buf, size, USB_CTRL_SET_TIMEOUT);
  69
  70         memcpy(data, buf, size);
  71         kfree(buf);
  72         return ((len < 0) ? len : ((len != size) ? -EIO : 0));
  73 }
  74
  75 static int kone_send(struct usb_device *usb_dev, uint usb_command,
  76                 void const *data, uint size)
  77 {
  78         char *buf;
  79         int len;
  80
  81         buf = kmemdup(data, size, GFP_KERNEL);
  82         if (buf == NULL)
  83                 return -ENOMEM;
  84
  85         len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
  86                         HID_REQ_SET_REPORT,
  87                         USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
  88                         usb_command, 0, buf, size, USB_CTRL_SET_TIMEOUT);
  89
  90         kfree(buf);
  91         return ((len < 0) ? len : ((len != size) ? -EIO : 0));
  92 }
  93
  94 /* kone_class is used for creating sysfs attributes via roccat char device */
  95 static struct class *kone_class;
  96
  97 static void kone_set_settings_checksum(struct kone_settings *settings)
  98 {
  99         uint16_t checksum = 0;
 100         unsigned char *address = (unsigned char *)settings;
 101         int i;
 102
 103         for (i = 0; i < sizeof(struct kone_settings) - 2; ++i, ++address)
 104                 checksum += *address;
 105         settings->checksum = cpu_to_le16(checksum);
 106 }
 107
 108 /*
 109  * Checks success after writing data to mouse
 110  * On success returns 0
 111  * On failure returns errno
 112  */
 113 static int kone_check_write(struct usb_device *usb_dev)
 114 {
 115         int retval;
 116         uint8_t data;
 117
 118         do {
 119                 /*
 120                  * Mouse needs 50 msecs until it says ok, but there are
 121                  * 30 more msecs needed for next write to work.
 122                  */
 123                 msleep(80);
 124
 125                 retval = kone_receive(usb_dev,
 126                                 kone_command_confirm_write, &data, 1);
 127                 if (retval)
 128                         return retval;
 129
 130                 /*
 131                  * value of 3 seems to mean something like
 132                  * "not finished yet, but it looks good"
 133                  * So check again after a moment.
 134                  */
 135         } while (data == 3);
 136
 137         if (data == 1) /* everything alright */
 138                 return 0;
 139
 140         /* unknown answer */
 141         dev_err(&usb_dev->dev, "got retval %d when checking write\n", data);
 142         return -EIO;
 143 }
 144
 145 /*
 146  * Reads settings from mouse and stores it in @buf
 147  * On success returns 0
 148  * On failure returns errno
 149  */
 150 static int kone_get_settings(struct usb_device *usb_dev,
 151                 struct kone_settings *buf)
 152 {
 153         return kone_receive(usb_dev, kone_command_settings, buf,
 154                         sizeof(struct kone_settings));
 155 }
 156
 157 /*
 158  * Writes settings from @buf to mouse
 159  * On success returns 0
 160  * On failure returns errno
 161  */
 162 static int kone_set_settings(struct usb_device *usb_dev,
 163                 struct kone_settings const *settings)
 164 {
 165         int retval;
 166         retval = kone_send(usb_dev, kone_command_settings,
 167                         settings, sizeof(struct kone_settings));
 168         if (retval)
 169                 return retval;
 170         return kone_check_write(usb_dev);
 171 }
 172
 173 /*
 174  * Reads profile data from mouse and stores it in @buf
 175  * @number: profile number to read
 176  * On success returns 0
 177  * On failure returns errno
 178  */
 179 static int kone_get_profile(struct usb_device *usb_dev,
 180                 struct kone_profile *buf, int number)
 181 {
 182         int len;
 183
 184         if (number < 1 || number > 5)
 185                 return -EINVAL;
 186
 187         len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 188                         USB_REQ_CLEAR_FEATURE,
 189                         USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 190                         kone_command_profile, number, buf,
 191                         sizeof(struct kone_profile), USB_CTRL_SET_TIMEOUT);
 192
 193         if (len != sizeof(struct kone_profile))
 194                 return -EIO;
 195
 196         return 0;
 197 }
 198
 199 /*
 200  * Writes profile data to mouse.
 201  * @number: profile number to write
 202  * On success returns 0
 203  * On failure returns errno
 204  */
 205 static int kone_set_profile(struct usb_device *usb_dev,
 206                 struct kone_profile const *profile, int number)
 207 {
 208         int len;
 209
 210         if (number < 1 || number > 5)
 211                 return -EINVAL;
 212
 213         len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 214                         USB_REQ_SET_CONFIGURATION,
 215                         USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
 216                         kone_command_profile, number, (void *)profile,
 217                         sizeof(struct kone_profile),
 218                         USB_CTRL_SET_TIMEOUT);
 219
 220         if (len != sizeof(struct kone_profile))
 221                 return len;
 222
 223         if (kone_check_write(usb_dev))
 224                 return -EIO;
 225
 226         return 0;
 227 }
 228
 229 /*
 230  * Reads value of "fast-clip-weight" and stores it in @result
 231  * On success returns 0
 232  * On failure returns errno
 233  */
 234 static int kone_get_weight(struct usb_device *usb_dev, int *result)
 235 {
 236         int retval;
 237         uint8_t data;
 238
 239         retval = kone_receive(usb_dev, kone_command_weight, &data, 1);
 240
 241         if (retval)
 242                 return retval;
 243
 244         *result = (int)data;
 245         return 0;
 246 }
 247
 248 /*
 249  * Reads firmware_version of mouse and stores it in @result
 250  * On success returns 0
 251  * On failure returns errno
 252  */
 253 static int kone_get_firmware_version(struct usb_device *usb_dev, int *result)
 254 {
 255         int retval;
 256         uint16_t data;
 257
 258         retval = kone_receive(usb_dev, kone_command_firmware_version,
 259                         &data, 2);
 260         if (retval)
 261                 return retval;
 262
 263         *result = le16_to_cpu(data);
 264         return 0;
 265 }
 266
 267 static ssize_t kone_sysfs_read_settings(struct file *fp, struct kobject *kobj,
 268                 struct bin_attribute *attr, char *buf,
 269                 loff_t off, size_t count) {
 270         struct device *dev =
 271                         container_of(kobj, struct device, kobj)->parent->parent;
 272         struct kone_device *kone = hid_get_drvdata(dev_get_drvdata(dev));
 273
 274         if (off >= sizeof(struct kone_settings))
 275                 return 0;
 276
 277         if (off + count > sizeof(struct kone_settings))
 278                 count = sizeof(struct kone_settings) - off;
 279
 280         mutex_lock(&kone->kone_lock);
 281         memcpy(buf, ((char const *)&kone->settings) + off, count);
 282         mutex_unlock(&kone->kone_lock);
 283
 284         return count;
 285 }
 286
 287 /*
 288  * Writing settings automatically activates startup_profile.
 289  * This function keeps values in kone_device up to date and assumes that in
 290  * case of error the old data is still valid
 291  */
 292 static ssize_t kone_sysfs_write_settings(struct file *fp, struct kobject *kobj,
 293                 struct bin_attribute *attr, char *buf,
 294                 loff_t off, size_t count) {
 295         struct device *dev =
 296                         container_of(kobj, struct device, kobj)->parent->parent;
 297         struct kone_device *kone = hid_get_drvdata(dev_get_drvdata(dev));
 298         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 299         int retval = 0, difference, old_profile;
 300
 301         /* I need to get my data in one piece */
 302         if (off != 0 || count != sizeof(struct kone_settings))
 303                 return -EINVAL;
 304
 305         mutex_lock(&kone->kone_lock);
 306         difference = memcmp(buf, &kone->settings, sizeof(struct kone_settings));
 307         if (difference) {
 308                 retval = kone_set_settings(usb_dev,
 309                                 (struct kone_settings const *)buf);
 310                 if (retval) {
 311                         mutex_unlock(&kone->kone_lock);
 312                         return retval;
 313                 }
 314
 315                 old_profile = kone->settings.startup_profile;
 316                 memcpy(&kone->settings, buf, sizeof(struct kone_settings));
 317
 318                 kone_profile_activated(kone, kone->settings.startup_profile);
 319
 320                 if (kone->settings.startup_profile != old_profile)
 321                         kone_profile_report(kone, kone->settings.startup_profile);
 322         }
 323         mutex_unlock(&kone->kone_lock);
 324
 325         return sizeof(struct kone_settings);
 326 }
 327
 328 static ssize_t kone_sysfs_read_profilex(struct file *fp,
 329                 struct kobject *kobj, struct bin_attribute *attr,
 330                 char *buf, loff_t off, size_t count) {
 331         struct device *dev =
 332                         container_of(kobj, struct device, kobj)->parent->parent;
 333         struct kone_device *kone = hid_get_drvdata(dev_get_drvdata(dev));
 334
 335         if (off >= sizeof(struct kone_profile))
 336                 return 0;
 337
 338         if (off + count > sizeof(struct kone_profile))
 339                 count = sizeof(struct kone_profile) - off;
 340
 341         mutex_lock(&kone->kone_lock);
 342         memcpy(buf, ((char const *)&kone->profiles[*(uint *)(attr->private)]) + off, count);
 343         mutex_unlock(&kone->kone_lock);
 344
 345         return count;
 346 }
 347
 348 /* Writes data only if different to stored data */
 349 static ssize_t kone_sysfs_write_profilex(struct file *fp,
 350                 struct kobject *kobj, struct bin_attribute *attr,
 351                 char *buf, loff_t off, size_t count) {
 352         struct device *dev =
 353                         container_of(kobj, struct device, kobj)->parent->parent;
 354         struct kone_device *kone = hid_get_drvdata(dev_get_drvdata(dev));
 355         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 356         struct kone_profile *profile;
 357         int retval = 0, difference;
 358
 359         /* I need to get my data in one piece */
 360         if (off != 0 || count != sizeof(struct kone_profile))
 361                 return -EINVAL;
 362
 363         profile = &kone->profiles[*(uint *)(attr->private)];
 364
 365         mutex_lock(&kone->kone_lock);
 366         difference = memcmp(buf, profile, sizeof(struct kone_profile));
 367         if (difference) {
 368                 retval = kone_set_profile(usb_dev,
 369                                 (struct kone_profile const *)buf,
 370                                 *(uint *)(attr->private) + 1);
 371                 if (!retval)
 372                         memcpy(profile, buf, sizeof(struct kone_profile));
 373         }
 374         mutex_unlock(&kone->kone_lock);
 375
 376         if (retval)
 377                 return retval;
 378
 379         return sizeof(struct kone_profile);
 380 }
 381
 382 static ssize_t kone_sysfs_show_actual_profile(struct device *dev,
 383                 struct device_attribute *attr, char *buf)
 384 {
 385         struct kone_device *kone =
 386                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 387         return snprintf(buf, PAGE_SIZE, "%d\n", kone->actual_profile);
 388 }
 389
 390 static ssize_t kone_sysfs_show_actual_dpi(struct device *dev,
 391                 struct device_attribute *attr, char *buf)
 392 {
 393         struct kone_device *kone =
 394                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 395         return snprintf(buf, PAGE_SIZE, "%d\n", kone->actual_dpi);
 396 }
 397
 398 /* weight is read each time, since we don't get informed when it's changed */
 399 static ssize_t kone_sysfs_show_weight(struct device *dev,
 400                 struct device_attribute *attr, char *buf)
 401 {
 402         struct kone_device *kone;
 403         struct usb_device *usb_dev;
 404         int weight = 0;
 405         int retval;
 406
 407         dev = dev->parent->parent;
 408         kone = hid_get_drvdata(dev_get_drvdata(dev));
 409         usb_dev = interface_to_usbdev(to_usb_interface(dev));
 410
 411         mutex_lock(&kone->kone_lock);
 412         retval = kone_get_weight(usb_dev, &weight);
 413         mutex_unlock(&kone->kone_lock);
 414
 415         if (retval)
 416                 return retval;
 417         return snprintf(buf, PAGE_SIZE, "%d\n", weight);
 418 }
 419
 420 static ssize_t kone_sysfs_show_firmware_version(struct device *dev,
 421                 struct device_attribute *attr, char *buf)
 422 {
 423         struct kone_device *kone =
 424                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 425         return snprintf(buf, PAGE_SIZE, "%d\n", kone->firmware_version);
 426 }
 427
 428 static ssize_t kone_sysfs_show_tcu(struct device *dev,
 429                 struct device_attribute *attr, char *buf)
 430 {
 431         struct kone_device *kone =
 432                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 433         return snprintf(buf, PAGE_SIZE, "%d\n", kone->settings.tcu);
 434 }
 435
 436 static int kone_tcu_command(struct usb_device *usb_dev, int number)
 437 {
 438         unsigned char value;
 439         value = number;
 440         return kone_send(usb_dev, kone_command_calibrate, &value, 1);
 441 }
 442
 443 /*
 444  * Calibrating the tcu is the only action that changes settings data inside the
 445  * mouse, so this data needs to be reread
 446  */
 447 static ssize_t kone_sysfs_set_tcu(struct device *dev,
 448                 struct device_attribute *attr, char const *buf, size_t size)
 449 {
 450         struct kone_device *kone;
 451         struct usb_device *usb_dev;
 452         int retval;
 453         unsigned long state;
 454
 455         dev = dev->parent->parent;
 456         kone = hid_get_drvdata(dev_get_drvdata(dev));
 457         usb_dev = interface_to_usbdev(to_usb_interface(dev));
 458
 459         retval = strict_strtoul(buf, 10, &state);
 460         if (retval)
 461                 return retval;
 462
 463         if (state != 0 && state != 1)
 464                 return -EINVAL;
 465
 466         mutex_lock(&kone->kone_lock);
 467
 468         if (state == 1) { /* state activate */
 469                 retval = kone_tcu_command(usb_dev, 1);
 470                 if (retval)
 471                         goto exit_unlock;
 472                 retval = kone_tcu_command(usb_dev, 2);
 473                 if (retval)
 474                         goto exit_unlock;
 475                 ssleep(5); /* tcu needs this time for calibration */
 476                 retval = kone_tcu_command(usb_dev, 3);
 477                 if (retval)
 478                         goto exit_unlock;
 479                 retval = kone_tcu_command(usb_dev, 0);
 480                 if (retval)
 481                         goto exit_unlock;
 482                 retval = kone_tcu_command(usb_dev, 4);
 483                 if (retval)
 484                         goto exit_unlock;
 485                 /*
 486                  * Kone needs this time to settle things.
 487                  * Reading settings too early will result in invalid data.
 488                  * Roccat's driver waits 1 sec, maybe this time could be
 489                  * shortened.
 490                  */
 491                 ssleep(1);
 492         }
 493
 494         /* calibration changes values in settings, so reread */
 495         retval = kone_get_settings(usb_dev, &kone->settings);
 496         if (retval)
 497                 goto exit_no_settings;
 498
 499         /* only write settings back if activation state is different */
 500         if (kone->settings.tcu != state) {
 501                 kone->settings.tcu = state;
 502                 kone_set_settings_checksum(&kone->settings);
 503
 504                 retval = kone_set_settings(usb_dev, &kone->settings);
 505                 if (retval) {
 506                         dev_err(&usb_dev->dev, "couldn't set tcu state\n");
 507                         /*
 508                          * try to reread valid settings into buffer overwriting
 509                          * first error code
 510                          */
 511                         retval = kone_get_settings(usb_dev, &kone->settings);
 512                         if (retval)
 513                                 goto exit_no_settings;
 514                         goto exit_unlock;
 515                 }
 516                 /* calibration resets profile */
 517                 kone_profile_activated(kone, kone->settings.startup_profile);
 518         }
 519
 520         retval = size;
 521 exit_no_settings:
 522         dev_err(&usb_dev->dev, "couldn't read settings\n");
 523 exit_unlock:
 524         mutex_unlock(&kone->kone_lock);
 525         return retval;
 526 }
 527
 528 static ssize_t kone_sysfs_show_startup_profile(struct device *dev,
 529                 struct device_attribute *attr, char *buf)
 530 {
 531         struct kone_device *kone =
 532                         hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
 533         return snprintf(buf, PAGE_SIZE, "%d\n", kone->settings.startup_profile);
 534 }
 535
 536 static ssize_t kone_sysfs_set_startup_profile(struct device *dev,
 537                 struct device_attribute *attr, char const *buf, size_t size)
 538 {
 539         struct kone_device *kone;
 540         struct usb_device *usb_dev;
 541         int retval;
 542         unsigned long new_startup_profile;
 543
 544         dev = dev->parent->parent;
 545         kone = hid_get_drvdata(dev_get_drvdata(dev));
 546         usb_dev = interface_to_usbdev(to_usb_interface(dev));
 547
 548         retval = strict_strtoul(buf, 10, &new_startup_profile);
 549         if (retval)
 550                 return retval;
 551
 552         if (new_startup_profile  < 1 || new_startup_profile > 5)
 553                 return -EINVAL;
 554
 555         mutex_lock(&kone->kone_lock);
 556
 557         kone->settings.startup_profile = new_startup_profile;
 558         kone_set_settings_checksum(&kone->settings);
 559
 560         retval = kone_set_settings(usb_dev, &kone->settings);
 561         if (retval) {
 562                 mutex_unlock(&kone->kone_lock);
 563                 return retval;
 564         }
 565
 566         /* changing the startup profile immediately activates this profile */
 567         kone_profile_activated(kone, new_startup_profile);
 568         kone_profile_report(kone, new_startup_profile);
 569
 570         mutex_unlock(&kone->kone_lock);
 571         return size;
 572 }
 573
 574 static struct device_attribute kone_attributes[] = {
 575         /*
 576          * Read actual dpi settings.
 577          * Returns raw value for further processing. Refer to enum
 578          * kone_polling_rates to get real value.
 579          */
 580         __ATTR(actual_dpi, 0440, kone_sysfs_show_actual_dpi, NULL),
 581         __ATTR(actual_profile, 0440, kone_sysfs_show_actual_profile, NULL),
 582
 583         /*
 584          * The mouse can be equipped with one of four supplied weights from 5
 585          * to 20 grams which are recognized and its value can be read out.
 586          * This returns the raw value reported by the mouse for easy evaluation
 587          * by software. Refer to enum kone_weights to get corresponding real
 588          * weight.
 589          */
 590         __ATTR(weight, 0440, kone_sysfs_show_weight, NULL),
 591
 592         /*
 593          * Prints firmware version stored in mouse as integer.
 594          * The raw value reported by the mouse is returned for easy evaluation,
 595          * to get the real version number the decimal point has to be shifted 2
 596          * positions to the left. E.g. a value of 138 means 1.38.
 597          */
 598         __ATTR(firmware_version, 0440,
 599                         kone_sysfs_show_firmware_version, NULL),
 600
 601         /*
 602          * Prints state of Tracking Control Unit as number where 0 = off and
 603          * 1 = on. Writing 0 deactivates tcu and writing 1 calibrates and
 604          * activates the tcu
 605          */
 606         __ATTR(tcu, 0660, kone_sysfs_show_tcu, kone_sysfs_set_tcu),
 607
 608         /* Prints and takes the number of the profile the mouse starts with */
 609         __ATTR(startup_profile, 0660,
 610                         kone_sysfs_show_startup_profile,
 611                         kone_sysfs_set_startup_profile),
 612         __ATTR_NULL
 613 };
 614
 615 static struct bin_attribute kone_bin_attributes[] = {
 616         {
 617                 .attr = { .name = "settings", .mode = 0660 },
 618                 .size = sizeof(struct kone_settings),
 619                 .read = kone_sysfs_read_settings,
 620                 .write = kone_sysfs_write_settings
 621         },
 622         {
 623                 .attr = { .name = "profile1", .mode = 0660 },
 624                 .size = sizeof(struct kone_profile),
 625                 .read = kone_sysfs_read_profilex,
 626                 .write = kone_sysfs_write_profilex,
 627                 .private = &profile_numbers[0]
 628         },
 629         {
 630                 .attr = { .name = "profile2", .mode = 0660 },
 631                 .size = sizeof(struct kone_profile),
 632                 .read = kone_sysfs_read_profilex,
 633                 .write = kone_sysfs_write_profilex,
 634                 .private = &profile_numbers[1]
 635         },
 636         {
 637                 .attr = { .name = "profile3", .mode = 0660 },
 638                 .size = sizeof(struct kone_profile),
 639                 .read = kone_sysfs_read_profilex,
 640                 .write = kone_sysfs_write_profilex,
 641                 .private = &profile_numbers[2]
 642         },
 643         {
 644                 .attr = { .name = "profile4", .mode = 0660 },
 645                 .size = sizeof(struct kone_profile),
 646                 .read = kone_sysfs_read_profilex,
 647                 .write = kone_sysfs_write_profilex,
 648                 .private = &profile_numbers[3]
 649         },
 650         {
 651                 .attr = { .name = "profile5", .mode = 0660 },
 652                 .size = sizeof(struct kone_profile),
 653                 .read = kone_sysfs_read_profilex,
 654                 .write = kone_sysfs_write_profilex,
 655                 .private = &profile_numbers[4]
 656         },
 657         __ATTR_NULL
 658 };
 659
 660 static int kone_init_kone_device_struct(struct usb_device *usb_dev,
 661                 struct kone_device *kone)
 662 {
 663         uint i;
 664         int retval;
 665
 666         mutex_init(&kone->kone_lock);
 667
 668         for (i = 0; i < 5; ++i) {
 669                 retval = kone_get_profile(usb_dev, &kone->profiles[i], i + 1);
 670                 if (retval)
 671                         return retval;
 672         }
 673
 674         retval = kone_get_settings(usb_dev, &kone->settings);
 675         if (retval)
 676                 return retval;
 677
 678         retval = kone_get_firmware_version(usb_dev, &kone->firmware_version);
 679         if (retval)
 680                 return retval;
 681
 682         kone_profile_activated(kone, kone->settings.startup_profile);
 683
 684         return 0;
 685 }
 686
 687 /*
 688  * Since IGNORE_MOUSE quirk moved to hid-apple, there is no way to bind only to
 689  * mousepart if usb_hid is compiled into the kernel and kone is compiled as
 690  * module.
 691  * Secial behaviour is bound only to mousepart since only mouseevents contain
 692  * additional notifications.
 693  */
 694 static int kone_init_specials(struct hid_device *hdev)
 695 {
 696         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 697         struct usb_device *usb_dev = interface_to_usbdev(intf);
 698         struct kone_device *kone;
 699         int retval;
 700
 701         if (intf->cur_altsetting->desc.bInterfaceProtocol
 702                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 703
 704                 kone = kzalloc(sizeof(*kone), GFP_KERNEL);
 705                 if (!kone) {
 706                         hid_err(hdev, "can't alloc device descriptor\n");
 707                         return -ENOMEM;
 708                 }
 709                 hid_set_drvdata(hdev, kone);
 710
 711                 retval = kone_init_kone_device_struct(usb_dev, kone);
 712                 if (retval) {
 713                         hid_err(hdev, "couldn't init struct kone_device\n");
 714                         goto exit_free;
 715                 }
 716
 717                 retval = roccat_connect(kone_class, hdev,
 718                                 sizeof(struct kone_roccat_report));
 719                 if (retval < 0) {
 720                         hid_err(hdev, "couldn't init char dev\n");
 721                         /* be tolerant about not getting chrdev */
 722                 } else {
 723                         kone->roccat_claimed = 1;
 724                         kone->chrdev_minor = retval;
 725                 }
 726         } else {
 727                 hid_set_drvdata(hdev, NULL);
 728         }
 729
 730         return 0;
 731 exit_free:
 732         kfree(kone);
 733         return retval;
 734 }
 735
 736 static void kone_remove_specials(struct hid_device *hdev)
 737 {
 738         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 739         struct kone_device *kone;
 740
 741         if (intf->cur_altsetting->desc.bInterfaceProtocol
 742                         == USB_INTERFACE_PROTOCOL_MOUSE) {
 743                 kone = hid_get_drvdata(hdev);
 744                 if (kone->roccat_claimed)
 745                         roccat_disconnect(kone->chrdev_minor);
 746                 kfree(hid_get_drvdata(hdev));
 747         }
 748 }
 749
 750 static int kone_probe(struct hid_device *hdev, const struct hid_device_id *id)
 751 {
 752         int retval;
 753
 754         retval = hid_parse(hdev);
 755         if (retval) {
 756                 hid_err(hdev, "parse failed\n");
 757                 goto exit;
 758         }
 759
 760         retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 761         if (retval) {
 762                 hid_err(hdev, "hw start failed\n");
 763                 goto exit;
 764         }
 765
 766         retval = kone_init_specials(hdev);
 767         if (retval) {
 768                 hid_err(hdev, "couldn't install mouse\n");
 769                 goto exit_stop;
 770         }
 771
 772         return 0;
 773
 774 exit_stop:
 775         hid_hw_stop(hdev);
 776 exit:
 777         return retval;
 778 }
 779
 780 static void kone_remove(struct hid_device *hdev)
 781 {
 782         kone_remove_specials(hdev);
 783         hid_hw_stop(hdev);
 784 }
 785
 786 /* handle special events and keep actual profile and dpi values up to date */
 787 static void kone_keep_values_up_to_date(struct kone_device *kone,
 788                 struct kone_mouse_event const *event)
 789 {
 790         switch (event->event) {
 791         case kone_mouse_event_switch_profile:
 792                 kone->actual_dpi = kone->profiles[event->value - 1].
 793                                 startup_dpi;
 794         case kone_mouse_event_osd_profile:
 795                 kone->actual_profile = event->value;
 796                 break;
 797         case kone_mouse_event_switch_dpi:
 798         case kone_mouse_event_osd_dpi:
 799                 kone->actual_dpi = event->value;
 800                 break;
 801         }
 802 }
 803
 804 static void kone_report_to_chrdev(struct kone_device const *kone,
 805                 struct kone_mouse_event const *event)
 806 {
 807         struct kone_roccat_report roccat_report;
 808
 809         switch (event->event) {
 810         case kone_mouse_event_switch_profile:
 811         case kone_mouse_event_switch_dpi:
 812         case kone_mouse_event_osd_profile:
 813         case kone_mouse_event_osd_dpi:
 814                 roccat_report.event = event->event;
 815                 roccat_report.value = event->value;
 816                 roccat_report.key = 0;
 817                 roccat_report_event(kone->chrdev_minor,
 818                                 (uint8_t *)&roccat_report);
 819                 break;
 820         case kone_mouse_event_call_overlong_macro:
 821         case kone_mouse_event_multimedia:
 822                 if (event->value == kone_keystroke_action_press) {
 823                         roccat_report.event = event->event;
 824                         roccat_report.value = kone->actual_profile;
 825                         roccat_report.key = event->macro_key;
 826                         roccat_report_event(kone->chrdev_minor,
 827                                         (uint8_t *)&roccat_report);
 828                 }
 829                 break;
 830         }
 831
 832 }
 833
 834 /*
 835  * Is called for keyboard- and mousepart.
 836  * Only mousepart gets informations about special events in its extended event
 837  * structure.
 838  */
 839 static int kone_raw_event(struct hid_device *hdev, struct hid_report *report,
 840                 u8 *data, int size)
 841 {
 842         struct kone_device *kone = hid_get_drvdata(hdev);
 843         struct kone_mouse_event *event = (struct kone_mouse_event *)data;
 844
 845         /* keyboard events are always processed by default handler */
 846         if (size != sizeof(struct kone_mouse_event))
 847                 return 0;
 848
 849         if (kone == NULL)
 850                 return 0;
 851
 852         /*
 853          * Firmware 1.38 introduced new behaviour for tilt and special buttons.
 854          * Pressed button is reported in each movement event.
 855          * Workaround sends only one event per press.
 856          */
 857         if (memcmp(&kone->last_mouse_event.tilt, &event->tilt, 5))
 858                 memcpy(&kone->last_mouse_event, event,
 859                                 sizeof(struct kone_mouse_event));
 860         else
 861                 memset(&event->tilt, 0, 5);
 862
 863         kone_keep_values_up_to_date(kone, event);
 864
 865         if (kone->roccat_claimed)
 866                 kone_report_to_chrdev(kone, event);
 867
 868         return 0; /* always do further processing */
 869 }
 870
 871 static const struct hid_device_id kone_devices[] = {
 872         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONE) },
 873         { }
 874 };
 875
 876 MODULE_DEVICE_TABLE(hid, kone_devices);
 877
 878 static struct hid_driver kone_driver = {
 879                 .name = "kone",
 880                 .id_table = kone_devices,
 881                 .probe = kone_probe,
 882                 .remove = kone_remove,
 883                 .raw_event = kone_raw_event
 884 };
 885
 886 static int __init kone_init(void)
 887 {
 888         int retval;
 889
 890         /* class name has to be same as driver name */
 891         kone_class = class_create(THIS_MODULE, "kone");
 892         if (IS_ERR(kone_class))
 893                 return PTR_ERR(kone_class);
 894         kone_class->dev_attrs = kone_attributes;
 895         kone_class->dev_bin_attrs = kone_bin_attributes;
 896
 897         retval = hid_register_driver(&kone_driver);
 898         if (retval)
 899                 class_destroy(kone_class);
 900         return retval;
 901 }
 902
 903 static void __exit kone_exit(void)
 904 {
 905         hid_unregister_driver(&kone_driver);
 906         class_destroy(kone_class);
 907 }
 908
 909 module_init(kone_init);
 910 module_exit(kone_exit);
 911
 912 MODULE_AUTHOR("Stefan Achatz");
 913 MODULE_DESCRIPTION("USB Roccat Kone driver");
 914 MODULE_LICENSE("GPL v2");