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 #ifdef CONFIG_X86_64
 158 #  define COMPAT_TEST test_thread_flag(TIF_IA32)
 159 #elif defined(CONFIG_IA64)
 160 #  define COMPAT_TEST IS_IA32_PROCESS(ia64_task_regs(current))
 161 #elif defined(CONFIG_S390)
 162 #  define COMPAT_TEST test_thread_flag(TIF_31BIT)
 163 #elif defined(CONFIG_MIPS)
 164 #  define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR)
 165 #else
 166 #  define COMPAT_TEST test_thread_flag(TIF_32BIT)
 167 #endif
 168
 169 static inline size_t evdev_event_size(void)
 170 {
 171         return COMPAT_TEST ?
 172                 sizeof(struct input_event_compat) : sizeof(struct input_event);
 173 }
 174
 175 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
 176 {
 177         if (COMPAT_TEST) {
 178                 struct input_event_compat compat_event;
 179
 180                 if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat)))
 181                         return -EFAULT;
 182
 183                 event->time.tv_sec = compat_event.time.tv_sec;
 184                 event->time.tv_usec = compat_event.time.tv_usec;
 185                 event->type = compat_event.type;
 186                 event->code = compat_event.code;
 187                 event->value = compat_event.value;
 188
 189         } else {
 190                 if (copy_from_user(event, buffer, sizeof(struct input_event)))
 191                         return -EFAULT;
 192         }
 193
 194         return 0;
 195 }
 196
 197 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
 198 {
 199         if (COMPAT_TEST) {
 200                 struct input_event_compat compat_event;
 201
 202                 compat_event.time.tv_sec = event->time.tv_sec;
 203                 compat_event.time.tv_usec = event->time.tv_usec;
 204                 compat_event.type = event->type;
 205                 compat_event.code = event->code;
 206                 compat_event.value = event->value;
 207
 208                 if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat)))
 209                         return -EFAULT;
 210
 211         } else {
 212                 if (copy_to_user(buffer, event, sizeof(struct input_event)))
 213                         return -EFAULT;
 214         }
 215
 216         return 0;
 217 }
 218
 219 #else
 220
 221 static inline size_t evdev_event_size(void)
 222 {
 223         return sizeof(struct input_event);
 224 }
 225
 226 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
 227 {
 228         if (copy_from_user(event, buffer, sizeof(struct input_event)))
 229                 return -EFAULT;
 230
 231         return 0;
 232 }
 233
 234 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
 235 {
 236         if (copy_to_user(buffer, event, sizeof(struct input_event)))
 237                 return -EFAULT;
 238
 239         return 0;
 240 }
 241
 242 #endif /* CONFIG_COMPAT */
 243
 244 static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
 245 {
 246         struct evdev_list *list = file->private_data;
 247         struct input_event event;
 248         int retval = 0;
 249
 250         if (!list->evdev->exist)
 251                 return -ENODEV;
 252
 253         while (retval < count) {
 254
 255                 if (evdev_event_from_user(buffer + retval, &event))
 256                         return -EFAULT;
 257                 input_event(list->evdev->handle.dev, event.type, event.code, event.value);
 258                 retval += evdev_event_size();
 259         }
 260
 261         return retval;
 262 }
 263
 264 static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
 265 {
 266         struct evdev_list *list = file->private_data;
 267         int retval;
 268
 269         if (count < evdev_event_size())
 270                 return -EINVAL;
 271
 272         if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
 273                 return -EAGAIN;
 274
 275         retval = wait_event_interruptible(list->evdev->wait,
 276                 list->head != list->tail || (!list->evdev->exist));
 277
 278         if (retval)
 279                 return retval;
 280
 281         if (!list->evdev->exist)
 282                 return -ENODEV;
 283
 284         while (list->head != list->tail && retval + evdev_event_size() <= count) {
 285
 286                 struct input_event *event = (struct input_event *) list->buffer + list->tail;
 287
 288                 if (evdev_event_to_user(buffer + retval, event))
 289                         return -EFAULT;
 290
 291                 list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
 292                 retval += evdev_event_size();
 293         }
 294
 295         return retval;
 296 }
 297
 298 /* No kernel lock - fine */
 299 static unsigned int evdev_poll(struct file *file, poll_table *wait)
 300 {
 301         struct evdev_list *list = file->private_data;
 302         poll_wait(file, &list->evdev->wait, wait);
 303         return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) |
 304                 (list->evdev->exist ? 0 : (POLLHUP | POLLERR));
 305 }
 306
 307 #ifdef CONFIG_COMPAT
 308
 309 #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
 310 #define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
 311
 312 #ifdef __BIG_ENDIAN
 313 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 314                         unsigned int maxlen, void __user *p, int compat)
 315 {
 316         int len, i;
 317
 318         if (compat) {
 319                 len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t);
 320                 if (len < maxlen)
 321                         len = maxlen;
 322
 323                 for (i = 0; i < len / sizeof(compat_long_t); i++)
 324                         if (copy_to_user((compat_long_t __user *) p + i,
 325                                          (compat_long_t *) bits +
 326                                                 i + 1 - ((i % 2) << 1),
 327                                          sizeof(compat_long_t)))
 328                                 return -EFAULT;
 329         } else {
 330                 len = NBITS(maxbit) * sizeof(long);
 331                 if (len > maxlen)
 332                         len = maxlen;
 333
 334                 if (copy_to_user(p, bits, len))
 335                         return -EFAULT;
 336         }
 337
 338         return len;
 339 }
 340 #else
 341 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 342                         unsigned int maxlen, void __user *p, int compat)
 343 {
 344         int len = compat ?
 345                         NBITS_COMPAT(maxbit) * sizeof(compat_long_t) :
 346                         NBITS(maxbit) * sizeof(long);
 347
 348         if (len > maxlen)
 349                 len = maxlen;
 350
 351         return copy_to_user(p, bits, len) ? -EFAULT : len;
 352 }
 353 #endif /* __BIG_ENDIAN */
 354
 355 #else
 356
 357 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 358                         unsigned int maxlen, void __user *p, int compat)
 359 {
 360         int len = NBITS(maxbit) * sizeof(long);
 361
 362         if (len > maxlen)
 363                 len = maxlen;
 364
 365         return copy_to_user(p, bits, len) ? -EFAULT : len;
 366 }
 367
 368 #endif /* CONFIG_COMPAT */
 369
 370 static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
 371 {
 372         int len;
 373
 374         if (!str)
 375                 return -ENOENT;
 376
 377         len = strlen(str) + 1;
 378         if (len > maxlen)
 379                 len = maxlen;
 380
 381         return copy_to_user(p, str, len) ? -EFAULT : len;
 382 }
 383
 384 static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
 385                                 void __user *p, int compat_mode)
 386 {
 387         struct evdev_list *list = file->private_data;
 388         struct evdev *evdev = list->evdev;
 389         struct input_dev *dev = evdev->handle.dev;
 390         struct input_absinfo abs;
 391         int __user *ip = (int __user *)p;
 392         int i, t, u, v;
 393
 394         if (!evdev->exist)
 395                 return -ENODEV;
 396
 397         switch (cmd) {
 398
 399                 case EVIOCGVERSION:
 400                         return put_user(EV_VERSION, ip);
 401
 402                 case EVIOCGID:
 403                         if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
 404                                 return -EFAULT;
 405
 406                         return 0;
 407
 408                 case EVIOCGKEYCODE:
 409                         if (get_user(t, ip))
 410                                 return -EFAULT;
 411                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
 412                                 return -EINVAL;
 413                         if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
 414                                 return -EFAULT;
 415                         return 0;
 416
 417                 case EVIOCSKEYCODE:
 418                         if (get_user(t, ip))
 419                                 return -EFAULT;
 420                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
 421                                 return -EINVAL;
 422                         if (get_user(v, ip + 1))
 423                                 return -EFAULT;
 424                         if (v < 0 || v > KEY_MAX)
 425                                 return -EINVAL;
 426                         if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
 427                                 return -EINVAL;
 428
 429                         u = SET_INPUT_KEYCODE(dev, t, v);
 430                         clear_bit(u, dev->keybit);
 431                         set_bit(v, dev->keybit);
 432                         for (i = 0; i < dev->keycodemax; i++)
 433                                 if (INPUT_KEYCODE(dev, i) == u)
 434                                         set_bit(u, dev->keybit);
 435
 436                         return 0;
 437
 438                 case EVIOCSFF:
 439                         if (dev->upload_effect) {
 440                                 struct ff_effect effect;
 441                                 int err;
 442
 443                                 if (copy_from_user(&effect, p, sizeof(effect)))
 444                                         return -EFAULT;
 445                                 err = dev->upload_effect(dev, &effect);
 446                                 if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
 447                                         return -EFAULT;
 448                                 return err;
 449                         } else
 450                                 return -ENOSYS;
 451
 452                 case EVIOCRMFF:
 453                         if (!dev->erase_effect)
 454                                 return -ENOSYS;
 455
 456                         return dev->erase_effect(dev, (int)(unsigned long) p);
 457
 458                 case EVIOCGEFFECTS:
 459                         if (put_user(dev->ff_effects_max, ip))
 460                                 return -EFAULT;
 461                         return 0;
 462
 463                 case EVIOCGRAB:
 464                         if (p) {
 465                                 if (evdev->grab)
 466                                         return -EBUSY;
 467                                 if (input_grab_device(&evdev->handle))
 468                                         return -EBUSY;
 469                                 evdev->grab = list;
 470                                 return 0;
 471                         } else {
 472                                 if (evdev->grab != list)
 473                                         return -EINVAL;
 474                                 input_release_device(&evdev->handle);
 475                                 evdev->grab = NULL;
 476                                 return 0;
 477                         }
 478
 479                 default:
 480
 481                         if (_IOC_TYPE(cmd) != 'E')
 482                                 return -EINVAL;
 483
 484                         if (_IOC_DIR(cmd) == _IOC_READ) {
 485
 486                                 if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
 487
 488                                         long *bits;
 489                                         int len;
 490
 491                                         switch (_IOC_NR(cmd) & EV_MAX) {
 492                                                 case      0: bits = dev->evbit;  len = EV_MAX;  break;
 493                                                 case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
 494                                                 case EV_REL: bits = dev->relbit; len = REL_MAX; break;
 495                                                 case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
 496                                                 case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
 497                                                 case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
 498                                                 case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
 499                                                 case EV_FF:  bits = dev->ffbit;  len = FF_MAX;  break;
 500                                                 case EV_SW:  bits = dev->swbit;  len = SW_MAX;  break;
 501                                                 default: return -EINVAL;
 502                                         }
 503                                         return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode);
 504                                 }
 505
 506                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0)))
 507                                         return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd),
 508                                                             p, compat_mode);
 509
 510                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0)))
 511                                         return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd),
 512                                                             p, compat_mode);
 513
 514                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
 515                                         return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd),
 516                                                             p, compat_mode);
 517
 518                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
 519                                         return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd),
 520                                                             p, compat_mode);
 521
 522                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0)))
 523                                         return str_to_user(dev->name, _IOC_SIZE(cmd), p);
 524
 525                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0)))
 526                                         return str_to_user(dev->phys, _IOC_SIZE(cmd), p);
 527
 528                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0)))
 529                                         return str_to_user(dev->uniq, _IOC_SIZE(cmd), p);
 530
 531                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
 532
 533                                         int t = _IOC_NR(cmd) & ABS_MAX;
 534
 535                                         abs.value = dev->abs[t];
 536                                         abs.minimum = dev->absmin[t];
 537                                         abs.maximum = dev->absmax[t];
 538                                         abs.fuzz = dev->absfuzz[t];
 539                                         abs.flat = dev->absflat[t];
 540
 541                                         if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
 542                                                 return -EFAULT;
 543
 544                                         return 0;
 545                                 }
 546
 547                         }
 548
 549                         if (_IOC_DIR(cmd) == _IOC_WRITE) {
 550
 551                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
 552
 553                                         int t = _IOC_NR(cmd) & ABS_MAX;
 554
 555                                         if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
 556                                                 return -EFAULT;
 557
 558                                         dev->abs[t] = abs.value;
 559                                         dev->absmin[t] = abs.minimum;
 560                                         dev->absmax[t] = abs.maximum;
 561                                         dev->absfuzz[t] = abs.fuzz;
 562                                         dev->absflat[t] = abs.flat;
 563
 564                                         return 0;
 565                                 }
 566                         }
 567         }
 568         return -EINVAL;
 569 }
 570
 571 static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 572 {
 573         return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
 574 }
 575
 576 #ifdef CONFIG_COMPAT
 577 static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
 578 {
 579         return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
 580 }
 581 #endif
 582
 583 static struct file_operations evdev_fops = {
 584         .owner =        THIS_MODULE,
 585         .read =         evdev_read,
 586         .write =        evdev_write,
 587         .poll =         evdev_poll,
 588         .open =         evdev_open,
 589         .release =      evdev_release,
 590         .unlocked_ioctl = evdev_ioctl,
 591 #ifdef CONFIG_COMPAT
 592         .compat_ioctl = evdev_ioctl_compat,
 593 #endif
 594         .fasync =       evdev_fasync,
 595         .flush =        evdev_flush
 596 };
 597
 598 static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 599 {
 600         struct evdev *evdev;
 601         struct class_device *cdev;
 602         int minor;
 603
 604         for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
 605         if (minor == EVDEV_MINORS) {
 606                 printk(KERN_ERR "evdev: no more free evdev devices\n");
 607                 return NULL;
 608         }
 609
 610         if (!(evdev = kmalloc(sizeof(struct evdev), GFP_KERNEL)))
 611                 return NULL;
 612         memset(evdev, 0, sizeof(struct evdev));
 613
 614         INIT_LIST_HEAD(&evdev->list);
 615         init_waitqueue_head(&evdev->wait);
 616
 617         evdev->exist = 1;
 618         evdev->minor = minor;
 619         evdev->handle.dev = dev;
 620         evdev->handle.name = evdev->name;
 621         evdev->handle.handler = handler;
 622         evdev->handle.private = evdev;
 623         sprintf(evdev->name, "event%d", minor);
 624
 625         evdev_table[minor] = evdev;
 626
 627         cdev = class_device_create(&input_class, &dev->cdev,
 628                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
 629                         dev->cdev.dev, evdev->name);
 630
 631         /* temporary symlink to keep userspace happy */
 632         sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
 633                           evdev->name);
 634
 635         return &evdev->handle;
 636 }
 637
 638 static void evdev_disconnect(struct input_handle *handle)
 639 {
 640         struct evdev *evdev = handle->private;
 641         struct evdev_list *list;
 642
 643         sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
 644         class_device_destroy(&input_class,
 645                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
 646         evdev->exist = 0;
 647
 648         if (evdev->open) {
 649                 input_close_device(handle);
 650                 wake_up_interruptible(&evdev->wait);
 651                 list_for_each_entry(list, &evdev->list, node)
 652                         kill_fasync(&list->fasync, SIGIO, POLL_HUP);
 653         } else
 654                 evdev_free(evdev);
 655 }
 656
 657 static struct input_device_id evdev_ids[] = {
 658         { .driver_info = 1 },   /* Matches all devices */
 659         { },                    /* Terminating zero entry */
 660 };
 661
 662 MODULE_DEVICE_TABLE(input, evdev_ids);
 663
 664 static struct input_handler evdev_handler = {
 665         .event =        evdev_event,
 666         .connect =      evdev_connect,
 667         .disconnect =   evdev_disconnect,
 668         .fops =         &evdev_fops,
 669         .minor =        EVDEV_MINOR_BASE,
 670         .name =         "evdev",
 671         .id_table =     evdev_ids,
 672 };
 673
 674 static int __init evdev_init(void)
 675 {
 676         input_register_handler(&evdev_handler);
 677         return 0;
 678 }
 679
 680 static void __exit evdev_exit(void)
 681 {
 682         input_unregister_handler(&evdev_handler);
 683 }
 684
 685 module_init(evdev_init);
 686 module_exit(evdev_exit);
 687
 688 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 689 MODULE_DESCRIPTION("Input driver event char devices");
 690 MODULE_LICENSE("GPL");