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 = kzalloc(sizeof(struct evdev_list), GFP_KERNEL)))
 134                 return -ENOMEM;
 135
 136         list->evdev = evdev_table[i];
 137         list_add_tail(&list->node, &evdev_table[i]->list);
 138         file->private_data = list;
 139
 140         if (!list->evdev->open++)
 141                 if (list->evdev->exist)
 142                         input_open_device(&list->evdev->handle);
 143
 144         return 0;
 145 }
 146
 147 #ifdef CONFIG_COMPAT
 148
 149 struct input_event_compat {
 150         struct compat_timeval time;
 151         __u16 type;
 152         __u16 code;
 153         __s32 value;
 154 };
 155
 156 /* Note to the author of this code: did it ever occur to
 157    you why the ifdefs are needed? Think about it again. -AK */
 158 #ifdef CONFIG_X86_64
 159 #  define COMPAT_TEST is_compat_task()
 160 #elif defined(CONFIG_IA64)
 161 #  define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
 162 #elif defined(CONFIG_S390)
 163 #  define COMPAT_TEST test_thread_flag(TIF_31BIT)
 164 #elif defined(CONFIG_MIPS)
 165 #  define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR)
 166 #else
 167 #  define COMPAT_TEST test_thread_flag(TIF_32BIT)
 168 #endif
 169
 170 static inline size_t evdev_event_size(void)
 171 {
 172         return COMPAT_TEST ?
 173                 sizeof(struct input_event_compat) : sizeof(struct input_event);
 174 }
 175
 176 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
 177 {
 178         if (COMPAT_TEST) {
 179                 struct input_event_compat compat_event;
 180
 181                 if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat)))
 182                         return -EFAULT;
 183
 184                 event->time.tv_sec = compat_event.time.tv_sec;
 185                 event->time.tv_usec = compat_event.time.tv_usec;
 186                 event->type = compat_event.type;
 187                 event->code = compat_event.code;
 188                 event->value = compat_event.value;
 189
 190         } else {
 191                 if (copy_from_user(event, buffer, sizeof(struct input_event)))
 192                         return -EFAULT;
 193         }
 194
 195         return 0;
 196 }
 197
 198 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
 199 {
 200         if (COMPAT_TEST) {
 201                 struct input_event_compat compat_event;
 202
 203                 compat_event.time.tv_sec = event->time.tv_sec;
 204                 compat_event.time.tv_usec = event->time.tv_usec;
 205                 compat_event.type = event->type;
 206                 compat_event.code = event->code;
 207                 compat_event.value = event->value;
 208
 209                 if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat)))
 210                         return -EFAULT;
 211
 212         } else {
 213                 if (copy_to_user(buffer, event, sizeof(struct input_event)))
 214                         return -EFAULT;
 215         }
 216
 217         return 0;
 218 }
 219
 220 #else
 221
 222 static inline size_t evdev_event_size(void)
 223 {
 224         return sizeof(struct input_event);
 225 }
 226
 227 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
 228 {
 229         if (copy_from_user(event, buffer, sizeof(struct input_event)))
 230                 return -EFAULT;
 231
 232         return 0;
 233 }
 234
 235 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
 236 {
 237         if (copy_to_user(buffer, event, sizeof(struct input_event)))
 238                 return -EFAULT;
 239
 240         return 0;
 241 }
 242
 243 #endif /* CONFIG_COMPAT */
 244
 245 static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
 246 {
 247         struct evdev_list *list = file->private_data;
 248         struct input_event event;
 249         int retval = 0;
 250
 251         if (!list->evdev->exist)
 252                 return -ENODEV;
 253
 254         while (retval < count) {
 255
 256                 if (evdev_event_from_user(buffer + retval, &event))
 257                         return -EFAULT;
 258                 input_event(list->evdev->handle.dev, event.type, event.code, event.value);
 259                 retval += evdev_event_size();
 260         }
 261
 262         return retval;
 263 }
 264
 265 static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
 266 {
 267         struct evdev_list *list = file->private_data;
 268         int retval;
 269
 270         if (count < evdev_event_size())
 271                 return -EINVAL;
 272
 273         if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
 274                 return -EAGAIN;
 275
 276         retval = wait_event_interruptible(list->evdev->wait,
 277                 list->head != list->tail || (!list->evdev->exist));
 278
 279         if (retval)
 280                 return retval;
 281
 282         if (!list->evdev->exist)
 283                 return -ENODEV;
 284
 285         while (list->head != list->tail && retval + evdev_event_size() <= count) {
 286
 287                 struct input_event *event = (struct input_event *) list->buffer + list->tail;
 288
 289                 if (evdev_event_to_user(buffer + retval, event))
 290                         return -EFAULT;
 291
 292                 list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
 293                 retval += evdev_event_size();
 294         }
 295
 296         return retval;
 297 }
 298
 299 /* No kernel lock - fine */
 300 static unsigned int evdev_poll(struct file *file, poll_table *wait)
 301 {
 302         struct evdev_list *list = file->private_data;
 303         poll_wait(file, &list->evdev->wait, wait);
 304         return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) |
 305                 (list->evdev->exist ? 0 : (POLLHUP | POLLERR));
 306 }
 307
 308 #ifdef CONFIG_COMPAT
 309
 310 #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
 311 #define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
 312
 313 #ifdef __BIG_ENDIAN
 314 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 315                         unsigned int maxlen, void __user *p, int compat)
 316 {
 317         int len, i;
 318
 319         if (compat) {
 320                 len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t);
 321                 if (len < maxlen)
 322                         len = maxlen;
 323
 324                 for (i = 0; i < len / sizeof(compat_long_t); i++)
 325                         if (copy_to_user((compat_long_t __user *) p + i,
 326                                          (compat_long_t *) bits +
 327                                                 i + 1 - ((i % 2) << 1),
 328                                          sizeof(compat_long_t)))
 329                                 return -EFAULT;
 330         } else {
 331                 len = NBITS(maxbit) * sizeof(long);
 332                 if (len > maxlen)
 333                         len = maxlen;
 334
 335                 if (copy_to_user(p, bits, len))
 336                         return -EFAULT;
 337         }
 338
 339         return len;
 340 }
 341 #else
 342 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 343                         unsigned int maxlen, void __user *p, int compat)
 344 {
 345         int len = compat ?
 346                         NBITS_COMPAT(maxbit) * sizeof(compat_long_t) :
 347                         NBITS(maxbit) * sizeof(long);
 348
 349         if (len > maxlen)
 350                 len = maxlen;
 351
 352         return copy_to_user(p, bits, len) ? -EFAULT : len;
 353 }
 354 #endif /* __BIG_ENDIAN */
 355
 356 #else
 357
 358 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 359                         unsigned int maxlen, void __user *p, int compat)
 360 {
 361         int len = NBITS(maxbit) * sizeof(long);
 362
 363         if (len > maxlen)
 364                 len = maxlen;
 365
 366         return copy_to_user(p, bits, len) ? -EFAULT : len;
 367 }
 368
 369 #endif /* CONFIG_COMPAT */
 370
 371 static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
 372 {
 373         int len;
 374
 375         if (!str)
 376                 return -ENOENT;
 377
 378         len = strlen(str) + 1;
 379         if (len > maxlen)
 380                 len = maxlen;
 381
 382         return copy_to_user(p, str, len) ? -EFAULT : len;
 383 }
 384
 385 static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
 386                                 void __user *p, int compat_mode)
 387 {
 388         struct evdev_list *list = file->private_data;
 389         struct evdev *evdev = list->evdev;
 390         struct input_dev *dev = evdev->handle.dev;
 391         struct input_absinfo abs;
 392         int __user *ip = (int __user *)p;
 393         int i, t, u, v;
 394
 395         if (!evdev->exist)
 396                 return -ENODEV;
 397
 398         switch (cmd) {
 399
 400                 case EVIOCGVERSION:
 401                         return put_user(EV_VERSION, ip);
 402
 403                 case EVIOCGID:
 404                         if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
 405                                 return -EFAULT;
 406                         return 0;
 407
 408                 case EVIOCGREP:
 409                         if (!test_bit(EV_REP, dev->evbit))
 410                                 return -ENOSYS;
 411                         if (put_user(dev->rep[REP_DELAY], ip))
 412                                 return -EFAULT;
 413                         if (put_user(dev->rep[REP_PERIOD], ip + 1))
 414                                 return -EFAULT;
 415                         return 0;
 416
 417                 case EVIOCSREP:
 418                         if (!test_bit(EV_REP, dev->evbit))
 419                                 return -ENOSYS;
 420                         if (get_user(u, ip))
 421                                 return -EFAULT;
 422                         if (get_user(v, ip + 1))
 423                                 return -EFAULT;
 424
 425                         input_event(dev, EV_REP, REP_DELAY, u);
 426                         input_event(dev, EV_REP, REP_PERIOD, v);
 427
 428                         return 0;
 429
 430                 case EVIOCGKEYCODE:
 431                         if (get_user(t, ip))
 432                                 return -EFAULT;
 433                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
 434                                 return -EINVAL;
 435                         if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
 436                                 return -EFAULT;
 437                         return 0;
 438
 439                 case EVIOCSKEYCODE:
 440                         if (get_user(t, ip))
 441                                 return -EFAULT;
 442                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
 443                                 return -EINVAL;
 444                         if (get_user(v, ip + 1))
 445                                 return -EFAULT;
 446                         if (v < 0 || v > KEY_MAX)
 447                                 return -EINVAL;
 448                         if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
 449                                 return -EINVAL;
 450
 451                         u = SET_INPUT_KEYCODE(dev, t, v);
 452                         clear_bit(u, dev->keybit);
 453                         set_bit(v, dev->keybit);
 454                         for (i = 0; i < dev->keycodemax; i++)
 455                                 if (INPUT_KEYCODE(dev, i) == u)
 456                                         set_bit(u, dev->keybit);
 457
 458                         return 0;
 459
 460                 case EVIOCSFF:
 461                         if (dev->upload_effect) {
 462                                 struct ff_effect effect;
 463                                 int err;
 464
 465                                 if (copy_from_user(&effect, p, sizeof(effect)))
 466                                         return -EFAULT;
 467                                 err = dev->upload_effect(dev, &effect);
 468                                 if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
 469                                         return -EFAULT;
 470                                 return err;
 471                         } else
 472                                 return -ENOSYS;
 473
 474                 case EVIOCRMFF:
 475                         if (!dev->erase_effect)
 476                                 return -ENOSYS;
 477
 478                         return dev->erase_effect(dev, (int)(unsigned long) p);
 479
 480                 case EVIOCGEFFECTS:
 481                         if (put_user(dev->ff_effects_max, ip))
 482                                 return -EFAULT;
 483                         return 0;
 484
 485                 case EVIOCGRAB:
 486                         if (p) {
 487                                 if (evdev->grab)
 488                                         return -EBUSY;
 489                                 if (input_grab_device(&evdev->handle))
 490                                         return -EBUSY;
 491                                 evdev->grab = list;
 492                                 return 0;
 493                         } else {
 494                                 if (evdev->grab != list)
 495                                         return -EINVAL;
 496                                 input_release_device(&evdev->handle);
 497                                 evdev->grab = NULL;
 498                                 return 0;
 499                         }
 500
 501                 default:
 502
 503                         if (_IOC_TYPE(cmd) != 'E')
 504                                 return -EINVAL;
 505
 506                         if (_IOC_DIR(cmd) == _IOC_READ) {
 507
 508                                 if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
 509
 510                                         long *bits;
 511                                         int len;
 512
 513                                         switch (_IOC_NR(cmd) & EV_MAX) {
 514                                                 case      0: bits = dev->evbit;  len = EV_MAX;  break;
 515                                                 case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
 516                                                 case EV_REL: bits = dev->relbit; len = REL_MAX; break;
 517                                                 case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
 518                                                 case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
 519                                                 case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
 520                                                 case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
 521                                                 case EV_FF:  bits = dev->ffbit;  len = FF_MAX;  break;
 522                                                 case EV_SW:  bits = dev->swbit;  len = SW_MAX;  break;
 523                                                 default: return -EINVAL;
 524                                         }
 525                                         return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode);
 526                                 }
 527
 528                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0)))
 529                                         return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd),
 530                                                             p, compat_mode);
 531
 532                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0)))
 533                                         return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd),
 534                                                             p, compat_mode);
 535
 536                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
 537                                         return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd),
 538                                                             p, compat_mode);
 539
 540                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
 541                                         return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd),
 542                                                             p, compat_mode);
 543
 544                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0)))
 545                                         return str_to_user(dev->name, _IOC_SIZE(cmd), p);
 546
 547                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0)))
 548                                         return str_to_user(dev->phys, _IOC_SIZE(cmd), p);
 549
 550                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0)))
 551                                         return str_to_user(dev->uniq, _IOC_SIZE(cmd), p);
 552
 553                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
 554
 555                                         int t = _IOC_NR(cmd) & ABS_MAX;
 556
 557                                         abs.value = dev->abs[t];
 558                                         abs.minimum = dev->absmin[t];
 559                                         abs.maximum = dev->absmax[t];
 560                                         abs.fuzz = dev->absfuzz[t];
 561                                         abs.flat = dev->absflat[t];
 562
 563                                         if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
 564                                                 return -EFAULT;
 565
 566                                         return 0;
 567                                 }
 568
 569                         }
 570
 571                         if (_IOC_DIR(cmd) == _IOC_WRITE) {
 572
 573                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
 574
 575                                         int t = _IOC_NR(cmd) & ABS_MAX;
 576
 577                                         if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
 578                                                 return -EFAULT;
 579
 580                                         dev->abs[t] = abs.value;
 581                                         dev->absmin[t] = abs.minimum;
 582                                         dev->absmax[t] = abs.maximum;
 583                                         dev->absfuzz[t] = abs.fuzz;
 584                                         dev->absflat[t] = abs.flat;
 585
 586                                         return 0;
 587                                 }
 588                         }
 589         }
 590         return -EINVAL;
 591 }
 592
 593 static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 594 {
 595         return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
 596 }
 597
 598 #ifdef CONFIG_COMPAT
 599 static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
 600 {
 601         return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
 602 }
 603 #endif
 604
 605 static struct file_operations evdev_fops = {
 606         .owner =        THIS_MODULE,
 607         .read =         evdev_read,
 608         .write =        evdev_write,
 609         .poll =         evdev_poll,
 610         .open =         evdev_open,
 611         .release =      evdev_release,
 612         .unlocked_ioctl = evdev_ioctl,
 613 #ifdef CONFIG_COMPAT
 614         .compat_ioctl = evdev_ioctl_compat,
 615 #endif
 616         .fasync =       evdev_fasync,
 617         .flush =        evdev_flush
 618 };
 619
 620 static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 621 {
 622         struct evdev *evdev;
 623         struct class_device *cdev;
 624         int minor;
 625
 626         for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
 627         if (minor == EVDEV_MINORS) {
 628                 printk(KERN_ERR "evdev: no more free evdev devices\n");
 629                 return NULL;
 630         }
 631
 632         if (!(evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL)))
 633                 return NULL;
 634
 635         INIT_LIST_HEAD(&evdev->list);
 636         init_waitqueue_head(&evdev->wait);
 637
 638         evdev->exist = 1;
 639         evdev->minor = minor;
 640         evdev->handle.dev = dev;
 641         evdev->handle.name = evdev->name;
 642         evdev->handle.handler = handler;
 643         evdev->handle.private = evdev;
 644         sprintf(evdev->name, "event%d", minor);
 645
 646         evdev_table[minor] = evdev;
 647
 648         cdev = class_device_create(&input_class, &dev->cdev,
 649                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
 650                         dev->cdev.dev, evdev->name);
 651
 652         /* temporary symlink to keep userspace happy */
 653         sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
 654                           evdev->name);
 655
 656         return &evdev->handle;
 657 }
 658
 659 static void evdev_disconnect(struct input_handle *handle)
 660 {
 661         struct evdev *evdev = handle->private;
 662         struct evdev_list *list;
 663
 664         sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
 665         class_device_destroy(&input_class,
 666                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
 667         evdev->exist = 0;
 668
 669         if (evdev->open) {
 670                 input_close_device(handle);
 671                 wake_up_interruptible(&evdev->wait);
 672                 list_for_each_entry(list, &evdev->list, node)
 673                         kill_fasync(&list->fasync, SIGIO, POLL_HUP);
 674         } else
 675                 evdev_free(evdev);
 676 }
 677
 678 static struct input_device_id evdev_ids[] = {
 679         { .driver_info = 1 },   /* Matches all devices */
 680         { },                    /* Terminating zero entry */
 681 };
 682
 683 MODULE_DEVICE_TABLE(input, evdev_ids);
 684
 685 static struct input_handler evdev_handler = {
 686         .event =        evdev_event,
 687         .connect =      evdev_connect,
 688         .disconnect =   evdev_disconnect,
 689         .fops =         &evdev_fops,
 690         .minor =        EVDEV_MINOR_BASE,
 691         .name =         "evdev",
 692         .id_table =     evdev_ids,
 693 };
 694
 695 static int __init evdev_init(void)
 696 {
 697         input_register_handler(&evdev_handler);
 698         return 0;
 699 }
 700
 701 static void __exit evdev_exit(void)
 702 {
 703         input_unregister_handler(&evdev_handler);
 704 }
 705
 706 module_init(evdev_init);
 707 module_exit(evdev_exit);
 708
 709 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 710 MODULE_DESCRIPTION("Input driver event char devices");
 711 MODULE_LICENSE("GPL");