Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / drivers / input / misc / uinput.c
1 /*
2  *  User level driver support for input subsystem
3  *
4  * Heavily based on evdev.c by Vojtech Pavlik
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
21  *
22  * Changes/Revisions:
23  *      0.3     09/04/2006 (Anssi Hannula <anssi.hannula@gmail.com>)
24  *              - updated ff support for the changes in kernel interface
25  *              - added MODULE_VERSION
26  *      0.2     16/10/2004 (Micah Dowty <micah@navi.cx>)
27  *              - added force feedback support
28  *              - added UI_SET_PHYS
29  *      0.1     20/06/2002
30  *              - first public version
31  */
32 #include <linux/poll.h>
33 #include <linux/slab.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/smp_lock.h>
37 #include <linux/fs.h>
38 #include <linux/miscdevice.h>
39 #include <linux/uinput.h>
40 #include "../input-compat.h"
41
42 static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
43 {
44         struct uinput_device    *udev = input_get_drvdata(dev);
45
46         udev->buff[udev->head].type = type;
47         udev->buff[udev->head].code = code;
48         udev->buff[udev->head].value = value;
49         do_gettimeofday(&udev->buff[udev->head].time);
50         udev->head = (udev->head + 1) % UINPUT_BUFFER_SIZE;
51
52         wake_up_interruptible(&udev->waitq);
53
54         return 0;
55 }
56
57 static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request)
58 {
59         /* Atomically allocate an ID for the given request. Returns 0 on success. */
60         int id;
61         int err = -1;
62
63         spin_lock(&udev->requests_lock);
64
65         for (id = 0; id < UINPUT_NUM_REQUESTS; id++)
66                 if (!udev->requests[id]) {
67                         request->id = id;
68                         udev->requests[id] = request;
69                         err = 0;
70                         break;
71                 }
72
73         spin_unlock(&udev->requests_lock);
74         return err;
75 }
76
77 static struct uinput_request* uinput_request_find(struct uinput_device *udev, int id)
78 {
79         /* Find an input request, by ID. Returns NULL if the ID isn't valid. */
80         if (id >= UINPUT_NUM_REQUESTS || id < 0)
81                 return NULL;
82
83         return udev->requests[id];
84 }
85
86 static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request)
87 {
88         /* Allocate slot. If none are available right away, wait. */
89         return wait_event_interruptible(udev->requests_waitq,
90                                         !uinput_request_alloc_id(udev, request));
91 }
92
93 static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request)
94 {
95         /* Mark slot as available */
96         udev->requests[request->id] = NULL;
97         wake_up(&udev->requests_waitq);
98
99         complete(&request->done);
100 }
101
102 static int uinput_request_submit(struct input_dev *dev, struct uinput_request *request)
103 {
104         /* Tell our userspace app about this new request by queueing an input event */
105         uinput_dev_event(dev, EV_UINPUT, request->code, request->id);
106
107         /* Wait for the request to complete */
108         wait_for_completion(&request->done);
109         return request->retval;
110 }
111
112 static void uinput_dev_set_gain(struct input_dev *dev, u16 gain)
113 {
114         uinput_dev_event(dev, EV_FF, FF_GAIN, gain);
115 }
116
117 static void uinput_dev_set_autocenter(struct input_dev *dev, u16 magnitude)
118 {
119         uinput_dev_event(dev, EV_FF, FF_AUTOCENTER, magnitude);
120 }
121
122 static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value)
123 {
124         return uinput_dev_event(dev, EV_FF, effect_id, value);
125 }
126
127 static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old)
128 {
129         struct uinput_request request;
130         int retval;
131
132         /*
133          * uinput driver does not currently support periodic effects with
134          * custom waveform since it does not have a way to pass buffer of
135          * samples (custom_data) to userspace. If ever there is a device
136          * supporting custom waveforms we would need to define an additional
137          * ioctl (UI_UPLOAD_SAMPLES) but for now we just bail out.
138          */
139         if (effect->type == FF_PERIODIC &&
140                         effect->u.periodic.waveform == FF_CUSTOM)
141                 return -EINVAL;
142
143         request.id = -1;
144         init_completion(&request.done);
145         request.code = UI_FF_UPLOAD;
146         request.u.upload.effect = effect;
147         request.u.upload.old = old;
148
149         retval = uinput_request_reserve_slot(input_get_drvdata(dev), &request);
150         if (!retval)
151                 retval = uinput_request_submit(dev, &request);
152
153         return retval;
154 }
155
156 static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id)
157 {
158         struct uinput_request request;
159         int retval;
160
161         if (!test_bit(EV_FF, dev->evbit))
162                 return -ENOSYS;
163
164         request.id = -1;
165         init_completion(&request.done);
166         request.code = UI_FF_ERASE;
167         request.u.effect_id = effect_id;
168
169         retval = uinput_request_reserve_slot(input_get_drvdata(dev), &request);
170         if (!retval)
171                 retval = uinput_request_submit(dev, &request);
172
173         return retval;
174 }
175
176 static void uinput_destroy_device(struct uinput_device *udev)
177 {
178         const char *name, *phys;
179
180         if (udev->dev) {
181                 name = udev->dev->name;
182                 phys = udev->dev->phys;
183                 if (udev->state == UIST_CREATED)
184                         input_unregister_device(udev->dev);
185                 else
186                         input_free_device(udev->dev);
187                 kfree(name);
188                 kfree(phys);
189                 udev->dev = NULL;
190         }
191
192         udev->state = UIST_NEW_DEVICE;
193 }
194
195 static int uinput_create_device(struct uinput_device *udev)
196 {
197         struct input_dev *dev = udev->dev;
198         int error;
199
200         if (udev->state != UIST_SETUP_COMPLETE) {
201                 printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME);
202                 return -EINVAL;
203         }
204
205         if (udev->ff_effects_max) {
206                 error = input_ff_create(dev, udev->ff_effects_max);
207                 if (error)
208                         goto fail1;
209
210                 dev->ff->upload = uinput_dev_upload_effect;
211                 dev->ff->erase = uinput_dev_erase_effect;
212                 dev->ff->playback = uinput_dev_playback;
213                 dev->ff->set_gain = uinput_dev_set_gain;
214                 dev->ff->set_autocenter = uinput_dev_set_autocenter;
215         }
216
217         error = input_register_device(udev->dev);
218         if (error)
219                 goto fail2;
220
221         udev->state = UIST_CREATED;
222
223         return 0;
224
225  fail2: input_ff_destroy(dev);
226  fail1: uinput_destroy_device(udev);
227         return error;
228 }
229
230 static int uinput_open(struct inode *inode, struct file *file)
231 {
232         struct uinput_device *newdev;
233
234         newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL);
235         if (!newdev)
236                 return -ENOMEM;
237
238         lock_kernel();
239         mutex_init(&newdev->mutex);
240         spin_lock_init(&newdev->requests_lock);
241         init_waitqueue_head(&newdev->requests_waitq);
242         init_waitqueue_head(&newdev->waitq);
243         newdev->state = UIST_NEW_DEVICE;
244
245         file->private_data = newdev;
246         unlock_kernel();
247
248         return 0;
249 }
250
251 static int uinput_validate_absbits(struct input_dev *dev)
252 {
253         unsigned int cnt;
254         int retval = 0;
255
256         for (cnt = 0; cnt < ABS_MAX + 1; cnt++) {
257                 if (!test_bit(cnt, dev->absbit))
258                         continue;
259
260                 if ((dev->absmax[cnt] <= dev->absmin[cnt])) {
261                         printk(KERN_DEBUG
262                                 "%s: invalid abs[%02x] min:%d max:%d\n",
263                                 UINPUT_NAME, cnt,
264                                 dev->absmin[cnt], dev->absmax[cnt]);
265                         retval = -EINVAL;
266                         break;
267                 }
268
269                 if (dev->absflat[cnt] > (dev->absmax[cnt] - dev->absmin[cnt])) {
270                         printk(KERN_DEBUG
271                                 "%s: absflat[%02x] out of range: %d "
272                                 "(min:%d/max:%d)\n",
273                                 UINPUT_NAME, cnt, dev->absflat[cnt],
274                                 dev->absmin[cnt], dev->absmax[cnt]);
275                         retval = -EINVAL;
276                         break;
277                 }
278         }
279         return retval;
280 }
281
282 static int uinput_allocate_device(struct uinput_device *udev)
283 {
284         udev->dev = input_allocate_device();
285         if (!udev->dev)
286                 return -ENOMEM;
287
288         udev->dev->event = uinput_dev_event;
289         input_set_drvdata(udev->dev, udev);
290
291         return 0;
292 }
293
294 static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count)
295 {
296         struct uinput_user_dev  *user_dev;
297         struct input_dev        *dev;
298         char                    *name;
299         int                     size;
300         int                     retval;
301
302         if (count != sizeof(struct uinput_user_dev))
303                 return -EINVAL;
304
305         if (!udev->dev) {
306                 retval = uinput_allocate_device(udev);
307                 if (retval)
308                         return retval;
309         }
310
311         dev = udev->dev;
312
313         user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL);
314         if (!user_dev)
315                 return -ENOMEM;
316
317         if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) {
318                 retval = -EFAULT;
319                 goto exit;
320         }
321
322         udev->ff_effects_max = user_dev->ff_effects_max;
323
324         size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1;
325         if (!size) {
326                 retval = -EINVAL;
327                 goto exit;
328         }
329
330         kfree(dev->name);
331         dev->name = name = kmalloc(size, GFP_KERNEL);
332         if (!name) {
333                 retval = -ENOMEM;
334                 goto exit;
335         }
336         strlcpy(name, user_dev->name, size);
337
338         dev->id.bustype = user_dev->id.bustype;
339         dev->id.vendor  = user_dev->id.vendor;
340         dev->id.product = user_dev->id.product;
341         dev->id.version = user_dev->id.version;
342
343         size = sizeof(int) * (ABS_MAX + 1);
344         memcpy(dev->absmax, user_dev->absmax, size);
345         memcpy(dev->absmin, user_dev->absmin, size);
346         memcpy(dev->absfuzz, user_dev->absfuzz, size);
347         memcpy(dev->absflat, user_dev->absflat, size);
348
349         /* check if absmin/absmax/absfuzz/absflat are filled as
350          * told in Documentation/input/input-programming.txt */
351         if (test_bit(EV_ABS, dev->evbit)) {
352                 retval = uinput_validate_absbits(dev);
353                 if (retval < 0)
354                         goto exit;
355         }
356
357         udev->state = UIST_SETUP_COMPLETE;
358         retval = count;
359
360  exit:
361         kfree(user_dev);
362         return retval;
363 }
364
365 static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count)
366 {
367         struct input_event ev;
368
369         if (count < input_event_size())
370                 return -EINVAL;
371
372         if (input_event_from_user(buffer, &ev))
373                 return -EFAULT;
374
375         input_event(udev->dev, ev.type, ev.code, ev.value);
376
377         return input_event_size();
378 }
379
380 static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
381 {
382         struct uinput_device *udev = file->private_data;
383         int retval;
384
385         retval = mutex_lock_interruptible(&udev->mutex);
386         if (retval)
387                 return retval;
388
389         retval = udev->state == UIST_CREATED ?
390                         uinput_inject_event(udev, buffer, count) :
391                         uinput_setup_device(udev, buffer, count);
392
393         mutex_unlock(&udev->mutex);
394
395         return retval;
396 }
397
398 static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
399 {
400         struct uinput_device *udev = file->private_data;
401         int retval = 0;
402
403         if (udev->state != UIST_CREATED)
404                 return -ENODEV;
405
406         if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK))
407                 return -EAGAIN;
408
409         retval = wait_event_interruptible(udev->waitq,
410                         udev->head != udev->tail || udev->state != UIST_CREATED);
411         if (retval)
412                 return retval;
413
414         retval = mutex_lock_interruptible(&udev->mutex);
415         if (retval)
416                 return retval;
417
418         if (udev->state != UIST_CREATED) {
419                 retval = -ENODEV;
420                 goto out;
421         }
422
423         while (udev->head != udev->tail && retval + input_event_size() <= count) {
424                 if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) {
425                         retval = -EFAULT;
426                         goto out;
427                 }
428                 udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE;
429                 retval += input_event_size();
430         }
431
432  out:
433         mutex_unlock(&udev->mutex);
434
435         return retval;
436 }
437
438 static unsigned int uinput_poll(struct file *file, poll_table *wait)
439 {
440         struct uinput_device *udev = file->private_data;
441
442         poll_wait(file, &udev->waitq, wait);
443
444         if (udev->head != udev->tail)
445                 return POLLIN | POLLRDNORM;
446
447         return 0;
448 }
449
450 static int uinput_release(struct inode *inode, struct file *file)
451 {
452         struct uinput_device *udev = file->private_data;
453
454         uinput_destroy_device(udev);
455         kfree(udev);
456
457         return 0;
458 }
459
460 #ifdef CONFIG_COMPAT
461 struct uinput_ff_upload_compat {
462         int                     request_id;
463         int                     retval;
464         struct ff_effect_compat effect;
465         struct ff_effect_compat old;
466 };
467
468 static int uinput_ff_upload_to_user(char __user *buffer,
469                                     const struct uinput_ff_upload *ff_up)
470 {
471         if (INPUT_COMPAT_TEST) {
472                 struct uinput_ff_upload_compat ff_up_compat;
473
474                 ff_up_compat.request_id = ff_up->request_id;
475                 ff_up_compat.retval = ff_up->retval;
476                 /*
477                  * It so happens that the pointer that gives us the trouble
478                  * is the last field in the structure. Since we don't support
479                  * custom waveforms in uinput anyway we can just copy the whole
480                  * thing (to the compat size) and ignore the pointer.
481                  */
482                 memcpy(&ff_up_compat.effect, &ff_up->effect,
483                         sizeof(struct ff_effect_compat));
484                 memcpy(&ff_up_compat.old, &ff_up->old,
485                         sizeof(struct ff_effect_compat));
486
487                 if (copy_to_user(buffer, &ff_up_compat,
488                                  sizeof(struct uinput_ff_upload_compat)))
489                         return -EFAULT;
490         } else {
491                 if (copy_to_user(buffer, ff_up,
492                                  sizeof(struct uinput_ff_upload)))
493                         return -EFAULT;
494         }
495
496         return 0;
497 }
498
499 static int uinput_ff_upload_from_user(const char __user *buffer,
500                                       struct uinput_ff_upload *ff_up)
501 {
502         if (INPUT_COMPAT_TEST) {
503                 struct uinput_ff_upload_compat ff_up_compat;
504
505                 if (copy_from_user(&ff_up_compat, buffer,
506                                    sizeof(struct uinput_ff_upload_compat)))
507                         return -EFAULT;
508
509                 ff_up->request_id = ff_up_compat.request_id;
510                 ff_up->retval = ff_up_compat.retval;
511                 memcpy(&ff_up->effect, &ff_up_compat.effect,
512                         sizeof(struct ff_effect_compat));
513                 memcpy(&ff_up->old, &ff_up_compat.old,
514                         sizeof(struct ff_effect_compat));
515
516         } else {
517                 if (copy_from_user(ff_up, buffer,
518                                    sizeof(struct uinput_ff_upload)))
519                         return -EFAULT;
520         }
521
522         return 0;
523 }
524
525 #else
526
527 static int uinput_ff_upload_to_user(char __user *buffer,
528                                     const struct uinput_ff_upload *ff_up)
529 {
530         if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload)))
531                 return -EFAULT;
532
533         return 0;
534 }
535
536 static int uinput_ff_upload_from_user(const char __user *buffer,
537                                       struct uinput_ff_upload *ff_up)
538 {
539         if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload)))
540                 return -EFAULT;
541
542         return 0;
543 }
544
545 #endif
546
547 #define uinput_set_bit(_arg, _bit, _max)                \
548 ({                                                      \
549         int __ret = 0;                                  \
550         if (udev->state == UIST_CREATED)                \
551                 __ret =  -EINVAL;                       \
552         else if ((_arg) > (_max))                       \
553                 __ret = -EINVAL;                        \
554         else set_bit((_arg), udev->dev->_bit);          \
555         __ret;                                          \
556 })
557
558 static long uinput_ioctl_handler(struct file *file, unsigned int cmd,
559                                  unsigned long arg, void __user *p)
560 {
561         int                     retval;
562         struct uinput_device    *udev = file->private_data;
563         struct uinput_ff_upload ff_up;
564         struct uinput_ff_erase  ff_erase;
565         struct uinput_request   *req;
566         int                     length;
567         char                    *phys;
568
569         retval = mutex_lock_interruptible(&udev->mutex);
570         if (retval)
571                 return retval;
572
573         if (!udev->dev) {
574                 retval = uinput_allocate_device(udev);
575                 if (retval)
576                         goto out;
577         }
578
579         switch (cmd) {
580                 case UI_DEV_CREATE:
581                         retval = uinput_create_device(udev);
582                         break;
583
584                 case UI_DEV_DESTROY:
585                         uinput_destroy_device(udev);
586                         break;
587
588                 case UI_SET_EVBIT:
589                         retval = uinput_set_bit(arg, evbit, EV_MAX);
590                         break;
591
592                 case UI_SET_KEYBIT:
593                         retval = uinput_set_bit(arg, keybit, KEY_MAX);
594                         break;
595
596                 case UI_SET_RELBIT:
597                         retval = uinput_set_bit(arg, relbit, REL_MAX);
598                         break;
599
600                 case UI_SET_ABSBIT:
601                         retval = uinput_set_bit(arg, absbit, ABS_MAX);
602                         break;
603
604                 case UI_SET_MSCBIT:
605                         retval = uinput_set_bit(arg, mscbit, MSC_MAX);
606                         break;
607
608                 case UI_SET_LEDBIT:
609                         retval = uinput_set_bit(arg, ledbit, LED_MAX);
610                         break;
611
612                 case UI_SET_SNDBIT:
613                         retval = uinput_set_bit(arg, sndbit, SND_MAX);
614                         break;
615
616                 case UI_SET_FFBIT:
617                         retval = uinput_set_bit(arg, ffbit, FF_MAX);
618                         break;
619
620                 case UI_SET_SWBIT:
621                         retval = uinput_set_bit(arg, swbit, SW_MAX);
622                         break;
623
624                 case UI_SET_PHYS:
625                         if (udev->state == UIST_CREATED) {
626                                 retval = -EINVAL;
627                                 goto out;
628                         }
629                         length = strnlen_user(p, 1024);
630                         if (length <= 0) {
631                                 retval = -EFAULT;
632                                 break;
633                         }
634                         kfree(udev->dev->phys);
635                         udev->dev->phys = phys = kmalloc(length, GFP_KERNEL);
636                         if (!phys) {
637                                 retval = -ENOMEM;
638                                 break;
639                         }
640                         if (copy_from_user(phys, p, length)) {
641                                 udev->dev->phys = NULL;
642                                 kfree(phys);
643                                 retval = -EFAULT;
644                                 break;
645                         }
646                         phys[length - 1] = '\0';
647                         break;
648
649                 case UI_BEGIN_FF_UPLOAD:
650                         retval = uinput_ff_upload_from_user(p, &ff_up);
651                         if (retval)
652                                 break;
653
654                         req = uinput_request_find(udev, ff_up.request_id);
655                         if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) {
656                                 retval = -EINVAL;
657                                 break;
658                         }
659
660                         ff_up.retval = 0;
661                         ff_up.effect = *req->u.upload.effect;
662                         if (req->u.upload.old)
663                                 ff_up.old = *req->u.upload.old;
664                         else
665                                 memset(&ff_up.old, 0, sizeof(struct ff_effect));
666
667                         retval = uinput_ff_upload_to_user(p, &ff_up);
668                         break;
669
670                 case UI_BEGIN_FF_ERASE:
671                         if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) {
672                                 retval = -EFAULT;
673                                 break;
674                         }
675
676                         req = uinput_request_find(udev, ff_erase.request_id);
677                         if (!req || req->code != UI_FF_ERASE) {
678                                 retval = -EINVAL;
679                                 break;
680                         }
681
682                         ff_erase.retval = 0;
683                         ff_erase.effect_id = req->u.effect_id;
684                         if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) {
685                                 retval = -EFAULT;
686                                 break;
687                         }
688
689                         break;
690
691                 case UI_END_FF_UPLOAD:
692                         retval = uinput_ff_upload_from_user(p, &ff_up);
693                         if (retval)
694                                 break;
695
696                         req = uinput_request_find(udev, ff_up.request_id);
697                         if (!req || req->code != UI_FF_UPLOAD ||
698                             !req->u.upload.effect) {
699                                 retval = -EINVAL;
700                                 break;
701                         }
702
703                         req->retval = ff_up.retval;
704                         uinput_request_done(udev, req);
705                         break;
706
707                 case UI_END_FF_ERASE:
708                         if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) {
709                                 retval = -EFAULT;
710                                 break;
711                         }
712
713                         req = uinput_request_find(udev, ff_erase.request_id);
714                         if (!req || req->code != UI_FF_ERASE) {
715                                 retval = -EINVAL;
716                                 break;
717                         }
718
719                         req->retval = ff_erase.retval;
720                         uinput_request_done(udev, req);
721                         break;
722
723                 default:
724                         retval = -EINVAL;
725         }
726
727  out:
728         mutex_unlock(&udev->mutex);
729         return retval;
730 }
731
732 static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
733 {
734         return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg);
735 }
736
737 #ifdef CONFIG_COMPAT
738 static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
739 {
740         return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg));
741 }
742 #endif
743
744 static const struct file_operations uinput_fops = {
745         .owner          = THIS_MODULE,
746         .open           = uinput_open,
747         .release        = uinput_release,
748         .read           = uinput_read,
749         .write          = uinput_write,
750         .poll           = uinput_poll,
751         .unlocked_ioctl = uinput_ioctl,
752 #ifdef CONFIG_COMPAT
753         .compat_ioctl   = uinput_compat_ioctl,
754 #endif
755 };
756
757 static struct miscdevice uinput_misc = {
758         .fops           = &uinput_fops,
759         .minor          = UINPUT_MINOR,
760         .name           = UINPUT_NAME,
761 };
762
763 static int __init uinput_init(void)
764 {
765         return misc_register(&uinput_misc);
766 }
767
768 static void __exit uinput_exit(void)
769 {
770         misc_deregister(&uinput_misc);
771 }
772
773 MODULE_AUTHOR("Aristeu Sergio Rozanski Filho");
774 MODULE_DESCRIPTION("User level driver support for input subsystem");
775 MODULE_LICENSE("GPL");
776 MODULE_VERSION("0.3");
777
778 module_init(uinput_init);
779 module_exit(uinput_exit);
780