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
  82         retval = fasync_helper(fd, file, on, &list->fasync);
  83
  84         return retval < 0 ? retval : 0;
  85 }
  86
  87 static int evdev_flush(struct file *file, fl_owner_t id)
  88 {
  89         struct evdev_list *list = file->private_data;
  90
  91         if (!list->evdev->exist)
  92                 return -ENODEV;
  93
  94         return input_flush_device(&list->evdev->handle, file);
  95 }
  96
  97 static void evdev_free(struct evdev *evdev)
  98 {
  99         evdev_table[evdev->minor] = NULL;
 100         kfree(evdev);
 101 }
 102
 103 static int evdev_release(struct inode * inode, struct file * file)
 104 {
 105         struct evdev_list *list = file->private_data;
 106
 107         if (list->evdev->grab == list) {
 108                 input_release_device(&list->evdev->handle);
 109                 list->evdev->grab = NULL;
 110         }
 111
 112         evdev_fasync(-1, file, 0);
 113         list_del(&list->node);
 114
 115         if (!--list->evdev->open) {
 116                 if (list->evdev->exist)
 117                         input_close_device(&list->evdev->handle);
 118                 else
 119                         evdev_free(list->evdev);
 120         }
 121
 122         kfree(list);
 123         return 0;
 124 }
 125
 126 static int evdev_open(struct inode * inode, struct file * file)
 127 {
 128         struct evdev_list *list;
 129         int i = iminor(inode) - EVDEV_MINOR_BASE;
 130         int accept_err;
 131
 132         if (i >= EVDEV_MINORS || !evdev_table[i] || !evdev_table[i]->exist)
 133                 return -ENODEV;
 134
 135         if ((accept_err = input_accept_process(&(evdev_table[i]->handle), file)))
 136                 return accept_err;
 137
 138         if (!(list = kzalloc(sizeof(struct evdev_list), GFP_KERNEL)))
 139                 return -ENOMEM;
 140
 141         list->evdev = evdev_table[i];
 142         list_add_tail(&list->node, &evdev_table[i]->list);
 143         file->private_data = list;
 144
 145         if (!list->evdev->open++)
 146                 if (list->evdev->exist)
 147                         input_open_device(&list->evdev->handle);
 148
 149         return 0;
 150 }
 151
 152 #ifdef CONFIG_COMPAT
 153
 154 struct input_event_compat {
 155         struct compat_timeval time;
 156         __u16 type;
 157         __u16 code;
 158         __s32 value;
 159 };
 160
 161 /* Note to the author of this code: did it ever occur to
 162    you why the ifdefs are needed? Think about it again. -AK */
 163 #ifdef CONFIG_X86_64
 164 #  define COMPAT_TEST is_compat_task()
 165 #elif defined(CONFIG_IA64)
 166 #  define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
 167 #elif defined(CONFIG_S390)
 168 #  define COMPAT_TEST test_thread_flag(TIF_31BIT)
 169 #elif defined(CONFIG_MIPS)
 170 #  define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR)
 171 #else
 172 #  define COMPAT_TEST test_thread_flag(TIF_32BIT)
 173 #endif
 174
 175 static inline size_t evdev_event_size(void)
 176 {
 177         return COMPAT_TEST ?
 178                 sizeof(struct input_event_compat) : sizeof(struct input_event);
 179 }
 180
 181 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
 182 {
 183         if (COMPAT_TEST) {
 184                 struct input_event_compat compat_event;
 185
 186                 if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat)))
 187                         return -EFAULT;
 188
 189                 event->time.tv_sec = compat_event.time.tv_sec;
 190                 event->time.tv_usec = compat_event.time.tv_usec;
 191                 event->type = compat_event.type;
 192                 event->code = compat_event.code;
 193                 event->value = compat_event.value;
 194
 195         } else {
 196                 if (copy_from_user(event, buffer, sizeof(struct input_event)))
 197                         return -EFAULT;
 198         }
 199
 200         return 0;
 201 }
 202
 203 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
 204 {
 205         if (COMPAT_TEST) {
 206                 struct input_event_compat compat_event;
 207
 208                 compat_event.time.tv_sec = event->time.tv_sec;
 209                 compat_event.time.tv_usec = event->time.tv_usec;
 210                 compat_event.type = event->type;
 211                 compat_event.code = event->code;
 212                 compat_event.value = event->value;
 213
 214                 if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat)))
 215                         return -EFAULT;
 216
 217         } else {
 218                 if (copy_to_user(buffer, event, sizeof(struct input_event)))
 219                         return -EFAULT;
 220         }
 221
 222         return 0;
 223 }
 224
 225 #else
 226
 227 static inline size_t evdev_event_size(void)
 228 {
 229         return sizeof(struct input_event);
 230 }
 231
 232 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
 233 {
 234         if (copy_from_user(event, buffer, sizeof(struct input_event)))
 235                 return -EFAULT;
 236
 237         return 0;
 238 }
 239
 240 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
 241 {
 242         if (copy_to_user(buffer, event, sizeof(struct input_event)))
 243                 return -EFAULT;
 244
 245         return 0;
 246 }
 247
 248 #endif /* CONFIG_COMPAT */
 249
 250 static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
 251 {
 252         struct evdev_list *list = file->private_data;
 253         struct input_event event;
 254         int retval = 0;
 255
 256         if (!list->evdev->exist)
 257                 return -ENODEV;
 258
 259         while (retval < count) {
 260
 261                 if (evdev_event_from_user(buffer + retval, &event))
 262                         return -EFAULT;
 263                 input_event(list->evdev->handle.dev, event.type, event.code, event.value);
 264                 retval += evdev_event_size();
 265         }
 266
 267         return retval;
 268 }
 269
 270 static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
 271 {
 272         struct evdev_list *list = file->private_data;
 273         int retval;
 274
 275         if (count < evdev_event_size())
 276                 return -EINVAL;
 277
 278         if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
 279                 return -EAGAIN;
 280
 281         retval = wait_event_interruptible(list->evdev->wait,
 282                 list->head != list->tail || (!list->evdev->exist));
 283
 284         if (retval)
 285                 return retval;
 286
 287         if (!list->evdev->exist)
 288                 return -ENODEV;
 289
 290         while (list->head != list->tail && retval + evdev_event_size() <= count) {
 291
 292                 struct input_event *event = (struct input_event *) list->buffer + list->tail;
 293
 294                 if (evdev_event_to_user(buffer + retval, event))
 295                         return -EFAULT;
 296
 297                 list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
 298                 retval += evdev_event_size();
 299         }
 300
 301         return retval;
 302 }
 303
 304 /* No kernel lock - fine */
 305 static unsigned int evdev_poll(struct file *file, poll_table *wait)
 306 {
 307         struct evdev_list *list = file->private_data;
 308
 309         poll_wait(file, &list->evdev->wait, wait);
 310         return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) |
 311                 (list->evdev->exist ? 0 : (POLLHUP | POLLERR));
 312 }
 313
 314 #ifdef CONFIG_COMPAT
 315
 316 #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
 317 #define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
 318
 319 #ifdef __BIG_ENDIAN
 320 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 321                         unsigned int maxlen, void __user *p, int compat)
 322 {
 323         int len, i;
 324
 325         if (compat) {
 326                 len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t);
 327                 if (len < maxlen)
 328                         len = maxlen;
 329
 330                 for (i = 0; i < len / sizeof(compat_long_t); i++)
 331                         if (copy_to_user((compat_long_t __user *) p + i,
 332                                          (compat_long_t *) bits +
 333                                                 i + 1 - ((i % 2) << 1),
 334                                          sizeof(compat_long_t)))
 335                                 return -EFAULT;
 336         } else {
 337                 len = NBITS(maxbit) * sizeof(long);
 338                 if (len > maxlen)
 339                         len = maxlen;
 340
 341                 if (copy_to_user(p, bits, len))
 342                         return -EFAULT;
 343         }
 344
 345         return len;
 346 }
 347 #else
 348 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 349                         unsigned int maxlen, void __user *p, int compat)
 350 {
 351         int len = compat ?
 352                         NBITS_COMPAT(maxbit) * sizeof(compat_long_t) :
 353                         NBITS(maxbit) * sizeof(long);
 354
 355         if (len > maxlen)
 356                 len = maxlen;
 357
 358         return copy_to_user(p, bits, len) ? -EFAULT : len;
 359 }
 360 #endif /* __BIG_ENDIAN */
 361
 362 #else
 363
 364 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
 365                         unsigned int maxlen, void __user *p, int compat)
 366 {
 367         int len = NBITS(maxbit) * sizeof(long);
 368
 369         if (len > maxlen)
 370                 len = maxlen;
 371
 372         return copy_to_user(p, bits, len) ? -EFAULT : len;
 373 }
 374
 375 #endif /* CONFIG_COMPAT */
 376
 377 static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
 378 {
 379         int len;
 380
 381         if (!str)
 382                 return -ENOENT;
 383
 384         len = strlen(str) + 1;
 385         if (len > maxlen)
 386                 len = maxlen;
 387
 388         return copy_to_user(p, str, len) ? -EFAULT : len;
 389 }
 390
 391 static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
 392                                 void __user *p, int compat_mode)
 393 {
 394         struct evdev_list *list = file->private_data;
 395         struct evdev *evdev = list->evdev;
 396         struct input_dev *dev = evdev->handle.dev;
 397         struct input_absinfo abs;
 398         int __user *ip = (int __user *)p;
 399         int i, t, u, v;
 400
 401         if (!evdev->exist)
 402                 return -ENODEV;
 403
 404         switch (cmd) {
 405
 406                 case EVIOCGVERSION:
 407                         return put_user(EV_VERSION, ip);
 408
 409                 case EVIOCGID:
 410                         if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
 411                                 return -EFAULT;
 412                         return 0;
 413
 414                 case EVIOCGREP:
 415                         if (!test_bit(EV_REP, dev->evbit))
 416                                 return -ENOSYS;
 417                         if (put_user(dev->rep[REP_DELAY], ip))
 418                                 return -EFAULT;
 419                         if (put_user(dev->rep[REP_PERIOD], ip + 1))
 420                                 return -EFAULT;
 421                         return 0;
 422
 423                 case EVIOCSREP:
 424                         if (!test_bit(EV_REP, dev->evbit))
 425                                 return -ENOSYS;
 426                         if (get_user(u, ip))
 427                                 return -EFAULT;
 428                         if (get_user(v, ip + 1))
 429                                 return -EFAULT;
 430
 431                         input_event(dev, EV_REP, REP_DELAY, u);
 432                         input_event(dev, EV_REP, REP_PERIOD, v);
 433
 434                         return 0;
 435
 436                 case EVIOCGKEYCODE:
 437                         if (get_user(t, ip))
 438                                 return -EFAULT;
 439                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
 440                                 return -EINVAL;
 441                         if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
 442                                 return -EFAULT;
 443                         return 0;
 444
 445                 case EVIOCSKEYCODE:
 446                         if (get_user(t, ip))
 447                                 return -EFAULT;
 448                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
 449                                 return -EINVAL;
 450                         if (get_user(v, ip + 1))
 451                                 return -EFAULT;
 452                         if (v < 0 || v > KEY_MAX)
 453                                 return -EINVAL;
 454                         if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
 455                                 return -EINVAL;
 456
 457                         u = SET_INPUT_KEYCODE(dev, t, v);
 458                         clear_bit(u, dev->keybit);
 459                         set_bit(v, dev->keybit);
 460                         for (i = 0; i < dev->keycodemax; i++)
 461                                 if (INPUT_KEYCODE(dev, i) == u)
 462                                         set_bit(u, dev->keybit);
 463
 464                         return 0;
 465
 466                 case EVIOCSFF:
 467                         if (dev->upload_effect) {
 468                                 struct ff_effect effect;
 469                                 int err;
 470
 471                                 if (copy_from_user(&effect, p, sizeof(effect)))
 472                                         return -EFAULT;
 473                                 err = dev->upload_effect(dev, &effect);
 474                                 if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
 475                                         return -EFAULT;
 476                                 return err;
 477                         } else
 478                                 return -ENOSYS;
 479
 480                 case EVIOCRMFF:
 481                         if (!dev->erase_effect)
 482                                 return -ENOSYS;
 483
 484                         return dev->erase_effect(dev, (int)(unsigned long) p);
 485
 486                 case EVIOCGEFFECTS:
 487                         if (put_user(dev->ff_effects_max, ip))
 488                                 return -EFAULT;
 489                         return 0;
 490
 491                 case EVIOCGRAB:
 492                         if (p) {
 493                                 if (evdev->grab)
 494                                         return -EBUSY;
 495                                 if (input_grab_device(&evdev->handle))
 496                                         return -EBUSY;
 497                                 evdev->grab = list;
 498                                 return 0;
 499                         } else {
 500                                 if (evdev->grab != list)
 501                                         return -EINVAL;
 502                                 input_release_device(&evdev->handle);
 503                                 evdev->grab = NULL;
 504                                 return 0;
 505                         }
 506
 507                 default:
 508
 509                         if (_IOC_TYPE(cmd) != 'E')
 510                                 return -EINVAL;
 511
 512                         if (_IOC_DIR(cmd) == _IOC_READ) {
 513
 514                                 if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
 515
 516                                         long *bits;
 517                                         int len;
 518
 519                                         switch (_IOC_NR(cmd) & EV_MAX) {
 520                                                 case      0: bits = dev->evbit;  len = EV_MAX;  break;
 521                                                 case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
 522                                                 case EV_REL: bits = dev->relbit; len = REL_MAX; break;
 523                                                 case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
 524                                                 case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
 525                                                 case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
 526                                                 case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
 527                                                 case EV_FF:  bits = dev->ffbit;  len = FF_MAX;  break;
 528                                                 case EV_SW:  bits = dev->swbit;  len = SW_MAX;  break;
 529                                                 default: return -EINVAL;
 530                                         }
 531                                         return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode);
 532                                 }
 533
 534                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0)))
 535                                         return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd),
 536                                                             p, compat_mode);
 537
 538                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0)))
 539                                         return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd),
 540                                                             p, compat_mode);
 541
 542                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
 543                                         return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd),
 544                                                             p, compat_mode);
 545
 546                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
 547                                         return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd),
 548                                                             p, compat_mode);
 549
 550                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0)))
 551                                         return str_to_user(dev->name, _IOC_SIZE(cmd), p);
 552
 553                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0)))
 554                                         return str_to_user(dev->phys, _IOC_SIZE(cmd), p);
 555
 556                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0)))
 557                                         return str_to_user(dev->uniq, _IOC_SIZE(cmd), p);
 558
 559                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
 560
 561                                         int t = _IOC_NR(cmd) & ABS_MAX;
 562
 563                                         abs.value = dev->abs[t];
 564                                         abs.minimum = dev->absmin[t];
 565                                         abs.maximum = dev->absmax[t];
 566                                         abs.fuzz = dev->absfuzz[t];
 567                                         abs.flat = dev->absflat[t];
 568
 569                                         if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
 570                                                 return -EFAULT;
 571
 572                                         return 0;
 573                                 }
 574
 575                         }
 576
 577                         if (_IOC_DIR(cmd) == _IOC_WRITE) {
 578
 579                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
 580
 581                                         int t = _IOC_NR(cmd) & ABS_MAX;
 582
 583                                         if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
 584                                                 return -EFAULT;
 585
 586                                         dev->abs[t] = abs.value;
 587                                         dev->absmin[t] = abs.minimum;
 588                                         dev->absmax[t] = abs.maximum;
 589                                         dev->absfuzz[t] = abs.fuzz;
 590                                         dev->absflat[t] = abs.flat;
 591
 592                                         return 0;
 593                                 }
 594                         }
 595         }
 596         return -EINVAL;
 597 }
 598
 599 static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 600 {
 601         return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
 602 }
 603
 604 #ifdef CONFIG_COMPAT
 605 static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
 606 {
 607         return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
 608 }
 609 #endif
 610
 611 static struct file_operations evdev_fops = {
 612         .owner =        THIS_MODULE,
 613         .read =         evdev_read,
 614         .write =        evdev_write,
 615         .poll =         evdev_poll,
 616         .open =         evdev_open,
 617         .release =      evdev_release,
 618         .unlocked_ioctl = evdev_ioctl,
 619 #ifdef CONFIG_COMPAT
 620         .compat_ioctl = evdev_ioctl_compat,
 621 #endif
 622         .fasync =       evdev_fasync,
 623         .flush =        evdev_flush
 624 };
 625
 626 static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 627 {
 628         struct evdev *evdev;
 629         struct class_device *cdev;
 630         int minor;
 631
 632         for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
 633         if (minor == EVDEV_MINORS) {
 634                 printk(KERN_ERR "evdev: no more free evdev devices\n");
 635                 return NULL;
 636         }
 637
 638         if (!(evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL)))
 639                 return NULL;
 640
 641         INIT_LIST_HEAD(&evdev->list);
 642         init_waitqueue_head(&evdev->wait);
 643
 644         evdev->exist = 1;
 645         evdev->minor = minor;
 646         evdev->handle.dev = dev;
 647         evdev->handle.name = evdev->name;
 648         evdev->handle.handler = handler;
 649         evdev->handle.private = evdev;
 650         sprintf(evdev->name, "event%d", minor);
 651
 652         evdev_table[minor] = evdev;
 653
 654         cdev = class_device_create(&input_class, &dev->cdev,
 655                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
 656                         dev->cdev.dev, evdev->name);
 657
 658         /* temporary symlink to keep userspace happy */
 659         sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
 660                           evdev->name);
 661
 662         return &evdev->handle;
 663 }
 664
 665 static void evdev_disconnect(struct input_handle *handle)
 666 {
 667         struct evdev *evdev = handle->private;
 668         struct evdev_list *list;
 669
 670         sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
 671         class_device_destroy(&input_class,
 672                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
 673         evdev->exist = 0;
 674
 675         if (evdev->open) {
 676                 input_close_device(handle);
 677                 wake_up_interruptible(&evdev->wait);
 678                 list_for_each_entry(list, &evdev->list, node)
 679                         kill_fasync(&list->fasync, SIGIO, POLL_HUP);
 680         } else
 681                 evdev_free(evdev);
 682 }
 683
 684 static struct input_device_id evdev_ids[] = {
 685         { .driver_info = 1 },   /* Matches all devices */
 686         { },                    /* Terminating zero entry */
 687 };
 688
 689 MODULE_DEVICE_TABLE(input, evdev_ids);
 690
 691 static struct input_handler evdev_handler = {
 692         .event =        evdev_event,
 693         .connect =      evdev_connect,
 694         .disconnect =   evdev_disconnect,
 695         .fops =         &evdev_fops,
 696         .minor =        EVDEV_MINOR_BASE,
 697         .name =         "evdev",
 698         .id_table =     evdev_ids,
 699 };
 700
 701 static int __init evdev_init(void)
 702 {
 703         input_register_handler(&evdev_handler);
 704         return 0;
 705 }
 706
 707 static void __exit evdev_exit(void)
 708 {
 709         input_unregister_handler(&evdev_handler);
 710 }
 711
 712 module_init(evdev_init);
 713 module_exit(evdev_exit);
 714
 715 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 716 MODULE_DESCRIPTION("Input driver event char devices");
 717 MODULE_LICENSE("GPL");