drivers/input/evdev.c

   1 /*
   2  * Event char devices, giving access to raw input device events.
   3  *
   4  * Copyright (c) 1999-2002 Vojtech Pavlik
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  */
  10
  11 #define EVDEV_MINOR_BASE        64
  12 #define EVDEV_MINORS            32
  13 #define EVDEV_BUFFER_SIZE       64
  14
  15 #include <linux/poll.h>
  16 #include <linux/slab.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/input.h>
  20 #include <linux/major.h>
  21 #include <linux/smp_lock.h>
  22 #include <linux/device.h>
  23 #include <linux/compat.h>
  24
  25 struct evdev {
  26         int exist;
  27         int open;
  28         int minor;
  29         char name[16];
  30         struct input_handle handle;
  31         wait_queue_head_t wait;
  32         struct evdev_list *grab;
  33         struct list_head list;
  34 };
  35
  36 struct evdev_list {
  37         struct input_event buffer[EVDEV_BUFFER_SIZE];
  38         int head;
  39         int tail;
  40         struct fasync_struct *fasync;
  41         struct evdev *evdev;
  42         struct list_head node;
  43 };
  44
  45 static struct evdev *evdev_table[EVDEV_MINORS];
  46
  47 static void evdev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
  48 {
  49         struct evdev *evdev = handle->private;
  50         struct evdev_list *list;
  51
  52         if (evdev->grab) {
  53                 list = evdev->grab;
  54
  55                 do_gettimeofday(&list->buffer[list->head].time);
  56                 list->buffer[list->head].type = type;
  57                 list->buffer[list->head].code = code;
  58                 list->buffer[list->head].value = value;
  59                 list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
  60
  61                 kill_fasync(&list->fasync, SIGIO, POLL_IN);
  62         } else
  63                 list_for_each_entry(list, &evdev->list, node) {
  64
  65                         do_gettimeofday(&list->buffer[list->head].time);
  66                         list->buffer[list->head].type = type;
  67                         list->buffer[list->head].code = code;
  68                         list->buffer[list->head].value = value;
  69                         list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
  70
  71                         kill_fasync(&list->fasync, SIGIO, POLL_IN);
  72                 }
  73
  74         wake_up_interruptible(&evdev->wait);
  75 }
  76
  77 static int evdev_fasync(int fd, struct file *file, int on)
  78 {
  79         int retval;
  80         struct evdev_list *list = file->private_data;
  81         retval = fasync_helper(fd, file, on, &list->fasync);
  82         return retval < 0 ? retval : 0;
  83 }
  84
  85 static int evdev_flush(struct file * file)
  86 {
  87         struct evdev_list *list = file->private_data;
  88         if (!list->evdev->exist) return -ENODEV;
  89         return input_flush_device(&list->evdev->handle, file);
  90 }
  91
  92 static void evdev_free(struct evdev *evdev)
  93 {
  94         evdev_table[evdev->minor] = NULL;
  95         kfree(evdev);
  96 }
  97
  98 static int evdev_release(struct inode * inode, struct file * file)
  99 {
 100         struct evdev_list *list = file->private_data;
 101
 102         if (list->evdev->grab == list) {
 103                 input_release_device(&list->evdev->handle);
 104                 list->evdev->grab = NULL;
 105         }
 106
 107         evdev_fasync(-1, file, 0);
 108         list_del(&list->node);
 109
 110         if (!--list->evdev->open) {
 111                 if (list->evdev->exist)
 112                         input_close_device(&list->evdev->handle);
 113                 else
 114                         evdev_free(list->evdev);
 115         }
 116
 117         kfree(list);
 118         return 0;
 119 }
 120
 121 static int evdev_open(struct inode * inode, struct file * file)
 122 {
 123         struct evdev_list *list;
 124         int i = iminor(inode) - EVDEV_MINOR_BASE;
 125         int accept_err;
 126
 127         if (i >= EVDEV_MINORS || !evdev_table[i] || !evdev_table[i]->exist)
 128                 return -ENODEV;
 129
 130         if ((accept_err = input_accept_process(&(evdev_table[i]->handle), file)))
 131                 return accept_err;
 132
 133         if (!(list = kmalloc(sizeof(struct evdev_list), GFP_KERNEL)))
 134                 return -ENOMEM;
 135         memset(list, 0, sizeof(struct evdev_list));
 136
 137         list->evdev = evdev_table[i];
 138         list_add_tail(&list->node, &evdev_table[i]->list);
 139         file->private_data = list;
 140
 141         if (!list->evdev->open++)
 142                 if (list->evdev->exist)
 143                         input_open_device(&list->evdev->handle);
 144
 145         return 0;
 146 }
 147
 148 #ifdef CONFIG_COMPAT
 149
 150 struct input_event_compat {
 151         struct compat_timeval time;
 152         __u16 type;
 153         __u16 code;
 154         __s32 value;
 155 };
 156
 157 /* Note to the author of this code: did it ever occur to
 158    you why the ifdefs are needed? Think about it again. -AK */
 159 #ifdef CONFIG_X86_64
 160 #  define COMPAT_TEST is_compat_task()
 161 #elif defined(CONFIG_IA64)
 162 #  define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
 163 #elif defined(CONFIG_S390)
 164 #  define COMPAT_TEST test_thread_flag(TIF_31BIT)
 165 #elif defined(CONFIG_MIPS)
 166 #  define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR)
 167 #else
 168 #  define COMPAT_TEST test_thread_flag(TIF_32BIT)
 169 #endif
 170
 171 static inline size_t evdev_event_size(void)
 172 {
 173         return COMPAT_TEST ?
 174                 sizeof(struct input_event_compat) : sizeof(struct input_event);
 175 }
 176
 177 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
 178 {
 179         if (COMPAT_TEST) {
 180                 struct input_event_compat compat_event;
 181
 182                 if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat)))
 183                         return -EFAULT;
 184
 185                 event->time.tv_sec = compat_event.time.tv_sec;
 186                 event->time.tv_usec = compat_event.time.tv_usec;
 187                 event->type = compat_event.type;
 188                 event->code = compat_event.code;
 189                 event->value = compat_event.value;
 190
 191         } else {
 192                 if (copy_from_user(event, buffer, sizeof(struct input_event)))
 193                         return -EFAULT;
 194         }
 195
 196         return 0;
 197 }
 198
 199 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
 200 {
 201         if (COMPAT_TEST) {
 202                 struct input_event_compat compat_event;
 203
 204                 compat_event.time.tv_sec = event->time.tv_sec;
 205                 compat_event.time.tv_usec = event->time.tv_usec;
 206                 compat_event.type = event->type;
 207                 compat_event.code = event->code;
 208                 compat_event.value = event->value;
 209
 210                 if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat)))
 211                         return -EFAULT;
 212
 213         } else {
 214                 if (copy_to_user(buffer, event, sizeof(struct input_event)))
 215                         return -EFAULT;
 216         }
 217
 218         return 0;
 219 }
 220
 221 #else
 222
 223 static inline size_t evdev_event_size(void)
 224 {
 225         return sizeof(struct input_event);
 226 }
 227
 228 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
 229 {
 230         if (copy_from_user(event, buffer, sizeof(struct input_event)))
 231                 return -EFAULT;
 232
 233         return 0;
 234 }
 235
 236 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
 237 {
 238         if (copy_to_user(buffer, event, sizeof(struct input_event)))
 239                 return -EFAULT;
 240
 241         return 0;
 242 }
 243
 244 #endif /* CONFIG_COMPAT */
 245
 246 static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
 247 {
 248         struct evdev_list *list = file->private_data;
 249         struct input_event event;
 250         int retval = 0;
 251
 252         if (!list->evdev->exist)
 253                 return -ENODEV;
 254
 255         while (retval < count) {
 256
 257                 if (evdev_event_from_user(buffer + retval, &event))
 258                         return -EFAULT;
 259                 input_event(list->evdev->handle.dev, event.type, event.code, event.value);
 260                 retval += evdev_event_size();
 261         }
 262
 263         return retval;
 264 }
 265
 266 static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
 267 {
 268         struct evdev_list *list = file->private_data;
 269         int retval;
 270
 271         if (count < evdev_event_size())
 272                 return -EINVAL;
 273
 274         if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
 275                 return -EAGAIN;
 276
 277         retval = wait_event_interruptible(list->evdev->wait,
 278                 list->head != list->tail || (!list->evdev->exist));
 279
 280         if (retval)
 281                 return retval;
 282
 283         if (!list->evdev->exist)
 284                 return -ENODEV;
 285
 286         while (list->head != list->tail && retval + evdev_event_size() <= count) {
 287
 288                 struct input_event *event = (struct input_event *) list->buffer + list->tail;
 289
 290                 if (evdev_event_to_user(buffer + retval, event))
 291                         return -EFAULT;
 292
 293                 list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
 294                 retval += evdev_event_size();
 295         }
 296
 297         return retval;
 298 }
 299
 300 /* No kernel lock - fine */
 301 static unsigned int evdev_poll(struct file *file, poll_table *wait)
 302 {
 303         struct evdev_list *list = file->private_data;
 304         poll_wait(file, &list->evdev->wait, wait);
 305         return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) |
 306                 (list->evdev->exist ? 0 : (POLLHUP | POLLERR));
 307 }
 308
 309 #ifdef CONFIG_COMPAT
 310
 311 #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
 312 #define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
 313
 314 #ifdef __BIG_ENDIAN
 315 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 316                         unsigned int maxlen, void __user *p, int compat)
 317 {
 318         int len, i;
 319
 320         if (compat) {
 321                 len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t);
 322                 if (len < maxlen)
 323                         len = maxlen;
 324
 325                 for (i = 0; i < len / sizeof(compat_long_t); i++)
 326                         if (copy_to_user((compat_long_t __user *) p + i,
 327                                          (compat_long_t *) bits +
 328                                                 i + 1 - ((i % 2) << 1),
 329                                          sizeof(compat_long_t)))
 330                                 return -EFAULT;
 331         } else {
 332                 len = NBITS(maxbit) * sizeof(long);
 333                 if (len > maxlen)
 334                         len = maxlen;
 335
 336                 if (copy_to_user(p, bits, len))
 337                         return -EFAULT;
 338         }
 339
 340         return len;
 341 }
 342 #else
 343 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 344                         unsigned int maxlen, void __user *p, int compat)
 345 {
 346         int len = compat ?
 347                         NBITS_COMPAT(maxbit) * sizeof(compat_long_t) :
 348                         NBITS(maxbit) * sizeof(long);
 349
 350         if (len > maxlen)
 351                 len = maxlen;
 352
 353         return copy_to_user(p, bits, len) ? -EFAULT : len;
 354 }
 355 #endif /* __BIG_ENDIAN */
 356
 357 #else
 358
 359 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 360                         unsigned int maxlen, void __user *p, int compat)
 361 {
 362         int len = NBITS(maxbit) * sizeof(long);
 363
 364         if (len > maxlen)
 365                 len = maxlen;
 366
 367         return copy_to_user(p, bits, len) ? -EFAULT : len;
 368 }
 369
 370 #endif /* CONFIG_COMPAT */
 371
 372 static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
 373 {
 374         int len;
 375
 376         if (!str)
 377                 return -ENOENT;
 378
 379         len = strlen(str) + 1;
 380         if (len > maxlen)
 381                 len = maxlen;
 382
 383         return copy_to_user(p, str, len) ? -EFAULT : len;
 384 }
 385
 386 static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
 387                                 void __user *p, int compat_mode)
 388 {
 389         struct evdev_list *list = file->private_data;
 390         struct evdev *evdev = list->evdev;
 391         struct input_dev *dev = evdev->handle.dev;
 392         struct input_absinfo abs;
 393         int __user *ip = (int __user *)p;
 394         int i, t, u, v;
 395
 396         if (!evdev->exist)
 397                 return -ENODEV;
 398
 399         switch (cmd) {
 400
 401                 case EVIOCGVERSION:
 402                         return put_user(EV_VERSION, ip);
 403
 404                 case EVIOCGID:
 405                         if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
 406                                 return -EFAULT;
 407
 408                         return 0;
 409
 410                 case EVIOCGKEYCODE:
 411                         if (get_user(t, ip))
 412                                 return -EFAULT;
 413                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
 414                                 return -EINVAL;
 415                         if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
 416                                 return -EFAULT;
 417                         return 0;
 418
 419                 case EVIOCSKEYCODE:
 420                         if (get_user(t, ip))
 421                                 return -EFAULT;
 422                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
 423                                 return -EINVAL;
 424                         if (get_user(v, ip + 1))
 425                                 return -EFAULT;
 426                         if (v < 0 || v > KEY_MAX)
 427                                 return -EINVAL;
 428                         if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
 429                                 return -EINVAL;
 430
 431                         u = SET_INPUT_KEYCODE(dev, t, v);
 432                         clear_bit(u, dev->keybit);
 433                         set_bit(v, dev->keybit);
 434                         for (i = 0; i < dev->keycodemax; i++)
 435                                 if (INPUT_KEYCODE(dev, i) == u)
 436                                         set_bit(u, dev->keybit);
 437
 438                         return 0;
 439
 440                 case EVIOCSFF:
 441                         if (dev->upload_effect) {
 442                                 struct ff_effect effect;
 443                                 int err;
 444
 445                                 if (copy_from_user(&effect, p, sizeof(effect)))
 446                                         return -EFAULT;
 447                                 err = dev->upload_effect(dev, &effect);
 448                                 if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
 449                                         return -EFAULT;
 450                                 return err;
 451                         } else
 452                                 return -ENOSYS;
 453
 454                 case EVIOCRMFF:
 455                         if (!dev->erase_effect)
 456                                 return -ENOSYS;
 457
 458                         return dev->erase_effect(dev, (int)(unsigned long) p);
 459
 460                 case EVIOCGEFFECTS:
 461                         if (put_user(dev->ff_effects_max, ip))
 462                                 return -EFAULT;
 463                         return 0;
 464
 465                 case EVIOCGRAB:
 466                         if (p) {
 467                                 if (evdev->grab)
 468                                         return -EBUSY;
 469                                 if (input_grab_device(&evdev->handle))
 470                                         return -EBUSY;
 471                                 evdev->grab = list;
 472                                 return 0;
 473                         } else {
 474                                 if (evdev->grab != list)
 475                                         return -EINVAL;
 476                                 input_release_device(&evdev->handle);
 477                                 evdev->grab = NULL;
 478                                 return 0;
 479                         }
 480
 481                 default:
 482
 483                         if (_IOC_TYPE(cmd) != 'E')
 484                                 return -EINVAL;
 485
 486                         if (_IOC_DIR(cmd) == _IOC_READ) {
 487
 488                                 if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
 489
 490                                         long *bits;
 491                                         int len;
 492
 493                                         switch (_IOC_NR(cmd) & EV_MAX) {
 494                                                 case      0: bits = dev->evbit;  len = EV_MAX;  break;
 495                                                 case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
 496                                                 case EV_REL: bits = dev->relbit; len = REL_MAX; break;
 497                                                 case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
 498                                                 case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
 499                                                 case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
 500                                                 case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
 501                                                 case EV_FF:  bits = dev->ffbit;  len = FF_MAX;  break;
 502                                                 case EV_SW:  bits = dev->swbit;  len = SW_MAX;  break;
 503                                                 default: return -EINVAL;
 504                                         }
 505                                         return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode);
 506                                 }
 507
 508                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0)))
 509                                         return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd),
 510                                                             p, compat_mode);
 511
 512                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0)))
 513                                         return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd),
 514                                                             p, compat_mode);
 515
 516                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
 517                                         return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd),
 518                                                             p, compat_mode);
 519
 520                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
 521                                         return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd),
 522                                                             p, compat_mode);
 523
 524                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0)))
 525                                         return str_to_user(dev->name, _IOC_SIZE(cmd), p);
 526
 527                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0)))
 528                                         return str_to_user(dev->phys, _IOC_SIZE(cmd), p);
 529
 530                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0)))
 531                                         return str_to_user(dev->uniq, _IOC_SIZE(cmd), p);
 532
 533                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
 534
 535                                         int t = _IOC_NR(cmd) & ABS_MAX;
 536
 537                                         abs.value = dev->abs[t];
 538                                         abs.minimum = dev->absmin[t];
 539                                         abs.maximum = dev->absmax[t];
 540                                         abs.fuzz = dev->absfuzz[t];
 541                                         abs.flat = dev->absflat[t];
 542
 543                                         if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
 544                                                 return -EFAULT;
 545
 546                                         return 0;
 547                                 }
 548
 549                         }
 550
 551                         if (_IOC_DIR(cmd) == _IOC_WRITE) {
 552
 553                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
 554
 555                                         int t = _IOC_NR(cmd) & ABS_MAX;
 556
 557                                         if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
 558                                                 return -EFAULT;
 559
 560                                         dev->abs[t] = abs.value;
 561                                         dev->absmin[t] = abs.minimum;
 562                                         dev->absmax[t] = abs.maximum;
 563                                         dev->absfuzz[t] = abs.fuzz;
 564                                         dev->absflat[t] = abs.flat;
 565
 566                                         return 0;
 567                                 }
 568                         }
 569         }
 570         return -EINVAL;
 571 }
 572
 573 static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 574 {
 575         return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
 576 }
 577
 578 #ifdef CONFIG_COMPAT
 579 static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
 580 {
 581         return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
 582 }
 583 #endif
 584
 585 static struct file_operations evdev_fops = {
 586         .owner =        THIS_MODULE,
 587         .read =         evdev_read,
 588         .write =        evdev_write,
 589         .poll =         evdev_poll,
 590         .open =         evdev_open,
 591         .release =      evdev_release,
 592         .unlocked_ioctl = evdev_ioctl,
 593 #ifdef CONFIG_COMPAT
 594         .compat_ioctl = evdev_ioctl_compat,
 595 #endif
 596         .fasync =       evdev_fasync,
 597         .flush =        evdev_flush
 598 };
 599
 600 static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 601 {
 602         struct evdev *evdev;
 603         struct class_device *cdev;
 604         int minor;
 605
 606         for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
 607         if (minor == EVDEV_MINORS) {
 608                 printk(KERN_ERR "evdev: no more free evdev devices\n");
 609                 return NULL;
 610         }
 611
 612         if (!(evdev = kmalloc(sizeof(struct evdev), GFP_KERNEL)))
 613                 return NULL;
 614         memset(evdev, 0, sizeof(struct evdev));
 615
 616         INIT_LIST_HEAD(&evdev->list);
 617         init_waitqueue_head(&evdev->wait);
 618
 619         evdev->exist = 1;
 620         evdev->minor = minor;
 621         evdev->handle.dev = dev;
 622         evdev->handle.name = evdev->name;
 623         evdev->handle.handler = handler;
 624         evdev->handle.private = evdev;
 625         sprintf(evdev->name, "event%d", minor);
 626
 627         evdev_table[minor] = evdev;
 628
 629         cdev = class_device_create(&input_class, &dev->cdev,
 630                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
 631                         dev->cdev.dev, evdev->name);
 632
 633         /* temporary symlink to keep userspace happy */
 634         sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
 635                           evdev->name);
 636
 637         return &evdev->handle;
 638 }
 639
 640 static void evdev_disconnect(struct input_handle *handle)
 641 {
 642         struct evdev *evdev = handle->private;
 643         struct evdev_list *list;
 644
 645         sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
 646         class_device_destroy(&input_class,
 647                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
 648         evdev->exist = 0;
 649
 650         if (evdev->open) {
 651                 input_close_device(handle);
 652                 wake_up_interruptible(&evdev->wait);
 653                 list_for_each_entry(list, &evdev->list, node)
 654                         kill_fasync(&list->fasync, SIGIO, POLL_HUP);
 655         } else
 656                 evdev_free(evdev);
 657 }
 658
 659 static struct input_device_id evdev_ids[] = {
 660         { .driver_info = 1 },   /* Matches all devices */
 661         { },                    /* Terminating zero entry */
 662 };
 663
 664 MODULE_DEVICE_TABLE(input, evdev_ids);
 665
 666 static struct input_handler evdev_handler = {
 667         .event =        evdev_event,
 668         .connect =      evdev_connect,
 669         .disconnect =   evdev_disconnect,
 670         .fops =         &evdev_fops,
 671         .minor =        EVDEV_MINOR_BASE,
 672         .name =         "evdev",
 673         .id_table =     evdev_ids,
 674 };
 675
 676 static int __init evdev_init(void)
 677 {
 678         input_register_handler(&evdev_handler);
 679         return 0;
 680 }
 681
 682 static void __exit evdev_exit(void)
 683 {
 684         input_unregister_handler(&evdev_handler);
 685 }
 686
 687 module_init(evdev_init);
 688 module_exit(evdev_exit);
 689
 690 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 691 MODULE_DESCRIPTION("Input driver event char devices");
 692 MODULE_LICENSE("GPL");