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 /* Atomically allocate an ID for the given request. Returns 0 on success. */
58 static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request)
59 {
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
74 spin_unlock(&udev->requests_lock);
75 return err;
76 }
77
78 static struct uinput_request *uinput_request_find(struct uinput_device *udev, int id)
79 {
80 /* Find an input request, by ID. Returns NULL if the ID isn't valid. */
81 if (id >= UINPUT_NUM_REQUESTS || id < 0)
82 return NULL;
83
84 return udev->requests[id];
85 }
86
87 static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request)
88 {
89 /* Allocate slot. If none are available right away, wait. */
90 return wait_event_interruptible(udev->requests_waitq,
91 !uinput_request_alloc_id(udev, request));
92 }
93
94 static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request)
95 {
96 /* Mark slot as available */
97 udev->requests[request->id] = NULL;
98 wake_up(&udev->requests_waitq);
99
100 complete(&request->done);
101 }
102
103 static int uinput_request_submit(struct uinput_device *udev, struct uinput_request *request)
104 {
105 int retval;
106
107 retval = uinput_request_reserve_slot(udev, request);
108 if (retval)
109 return retval;
110
111 retval = mutex_lock_interruptible(&udev->mutex);
112 if (retval)
113 return retval;
114
115 if (udev->state != UIST_CREATED) {
116 retval = -ENODEV;
117 goto out;
118 }
119
120 /* Tell our userspace app about this new request by queueing an input event */
121 uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id);
122
123 out:
124 mutex_unlock(&udev->mutex);
125 return retval;
126 }
127
128 /*
129 * Fail all ouitstanding requests so handlers don't wait for the userspace
130 * to finish processing them.
131 */
132 static void uinput_flush_requests(struct uinput_device *udev)
133 {
134 struct uinput_request *request;
135 int i;
136
137 spin_lock(&udev->requests_lock);
138
139 for (i = 0; i < UINPUT_NUM_REQUESTS; i++) {
140 request = udev->requests[i];
141 if (request) {
142 request->retval = -ENODEV;
143 uinput_request_done(udev, request);
144 }
145 }
146
147 spin_unlock(&udev->requests_lock);
148 }
149
150 static void uinput_dev_set_gain(struct input_dev *dev, u16 gain)
151 {
152 uinput_dev_event(dev, EV_FF, FF_GAIN, gain);
153 }
154
155 static void uinput_dev_set_autocenter(struct input_dev *dev, u16 magnitude)
156 {
157 uinput_dev_event(dev, EV_FF, FF_AUTOCENTER, magnitude);
158 }
159
160 static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value)
161 {
162 return uinput_dev_event(dev, EV_FF, effect_id, value);
163 }
164
165 static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old)
166 {
167 struct uinput_device *udev = input_get_drvdata(dev);
168 struct uinput_request request;
169 int retval;
170
171 /*
172 * uinput driver does not currently support periodic effects with
173 * custom waveform since it does not have a way to pass buffer of
174 * samples (custom_data) to userspace. If ever there is a device
175 * supporting custom waveforms we would need to define an additional
176 * ioctl (UI_UPLOAD_SAMPLES) but for now we just bail out.
177 */
178 if (effect->type == FF_PERIODIC &&
179 effect->u.periodic.waveform == FF_CUSTOM)
180 return -EINVAL;
181
182 request.id = -1;
183 init_completion(&request.done);
184 request.code = UI_FF_UPLOAD;
185 request.u.upload.effect = effect;
186 request.u.upload.old = old;
187
188 retval = uinput_request_submit(udev, &request);
189 if (!retval) {
190 wait_for_completion(&request.done);
191 retval = request.retval;
192 }
193
194 return retval;
195 }
196
197 static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id)
198 {
199 struct uinput_device *udev = input_get_drvdata(dev);
200 struct uinput_request request;
201 int retval;
202
203 if (!test_bit(EV_FF, dev->evbit))
204 return -ENOSYS;
205
206 request.id = -1;
207 init_completion(&request.done);
208 request.code = UI_FF_ERASE;
209 request.u.effect_id = effect_id;
210
211 retval = uinput_request_submit(udev, &request);
212 if (!retval) {
213 wait_for_completion(&request.done);
214 retval = request.retval;
215 }
216
217 return retval;
218 }
219
220 static void uinput_destroy_device(struct uinput_device *udev)
221 {
222 const char *name, *phys;
223 struct input_dev *dev = udev->dev;
224 enum uinput_state old_state = udev->state;
225
226 udev->state = UIST_NEW_DEVICE;
227
228 if (dev) {
229 name = dev->name;
230 phys = dev->phys;
231 if (old_state == UIST_CREATED) {
232 uinput_flush_requests(udev);
233 input_unregister_device(dev);
234 } else {
235 input_free_device(dev);
236 }
237 kfree(name);
238 kfree(phys);
239 udev->dev = NULL;
240 }
241 }
242
243 static int uinput_create_device(struct uinput_device *udev)
244 {
245 struct input_dev *dev = udev->dev;
246 int error;
247
248 if (udev->state != UIST_SETUP_COMPLETE) {
249 printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME);
250 return -EINVAL;
251 }
252
253 if (udev->ff_effects_max) {
254 error = input_ff_create(dev, udev->ff_effects_max);
255 if (error)
256 goto fail1;
257
258 dev->ff->upload = uinput_dev_upload_effect;
259 dev->ff->erase = uinput_dev_erase_effect;
260 dev->ff->playback = uinput_dev_playback;
261 dev->ff->set_gain = uinput_dev_set_gain;
262 dev->ff->set_autocenter = uinput_dev_set_autocenter;
263 }
264
265 error = input_register_device(udev->dev);
266 if (error)
267 goto fail2;
268
269 udev->state = UIST_CREATED;
270
271 return 0;
272
273 fail2: input_ff_destroy(dev);
274 fail1: uinput_destroy_device(udev);
275 return error;
276 }
277
278 static int uinput_open(struct inode *inode, struct file *file)
279 {
280 struct uinput_device *newdev;
281
282 newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL);
283 if (!newdev)
284 return -ENOMEM;
285
286 lock_kernel();
287 mutex_init(&newdev->mutex);
288 spin_lock_init(&newdev->requests_lock);
289 init_waitqueue_head(&newdev->requests_waitq);
290 init_waitqueue_head(&newdev->waitq);
291 newdev->state = UIST_NEW_DEVICE;
292
293 file->private_data = newdev;
294 unlock_kernel();
295
296 return 0;
297 }
298
299 static int uinput_validate_absbits(struct input_dev *dev)
300 {
301 unsigned int cnt;
302 int retval = 0;
303
304 for (cnt = 0; cnt < ABS_MAX + 1; cnt++) {
305 if (!test_bit(cnt, dev->absbit))
306 continue;
307
308 if ((dev->absmax[cnt] <= dev->absmin[cnt])) {
309 printk(KERN_DEBUG
310 "%s: invalid abs[%02x] min:%d max:%d\n",
311 UINPUT_NAME, cnt,
312 dev->absmin[cnt], dev->absmax[cnt]);
313 retval = -EINVAL;
314 break;
315 }
316
317 if (dev->absflat[cnt] > (dev->absmax[cnt] - dev->absmin[cnt])) {
318 printk(KERN_DEBUG
319 "%s: absflat[%02x] out of range: %d "
320 "(min:%d/max:%d)\n",
321 UINPUT_NAME, cnt, dev->absflat[cnt],
322 dev->absmin[cnt], dev->absmax[cnt]);
323 retval = -EINVAL;
324 break;
325 }
326 }
327 return retval;
328 }
329
330 static int uinput_allocate_device(struct uinput_device *udev)
331 {
332 udev->dev = input_allocate_device();
333 if (!udev->dev)
334 return -ENOMEM;
335
336 udev->dev->event = uinput_dev_event;
337 input_set_drvdata(udev->dev, udev);
338
339 return 0;
340 }
341
342 static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count)
343 {
344 struct uinput_user_dev *user_dev;
345 struct input_dev *dev;
346 char *name;
347 int size;
348 int retval;
349
350 if (count != sizeof(struct uinput_user_dev))
351 return -EINVAL;
352
353 if (!udev->dev) {
354 retval = uinput_allocate_device(udev);
355 if (retval)
356 return retval;
357 }
358
359 dev = udev->dev;
360
361 user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL);
362 if (!user_dev)
363 return -ENOMEM;
364
365 if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) {
366 retval = -EFAULT;
367 goto exit;
368 }
369
370 udev->ff_effects_max = user_dev->ff_effects_max;
371
372 size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1;
373 if (!size) {
374 retval = -EINVAL;
375 goto exit;
376 }
377
378 kfree(dev->name);
379 dev->name = name = kmalloc(size, GFP_KERNEL);
380 if (!name) {
381 retval = -ENOMEM;
382 goto exit;
383 }
384 strlcpy(name, user_dev->name, size);
385
386 dev->id.bustype = user_dev->id.bustype;
387 dev->id.vendor = user_dev->id.vendor;
388 dev->id.product = user_dev->id.product;
389 dev->id.version = user_dev->id.version;
390
391 size = sizeof(int) * (ABS_MAX + 1);
392 memcpy(dev->absmax, user_dev->absmax, size);
393 memcpy(dev->absmin, user_dev->absmin, size);
394 memcpy(dev->absfuzz, user_dev->absfuzz, size);
395 memcpy(dev->absflat, user_dev->absflat, size);
396
397 /* check if absmin/absmax/absfuzz/absflat are filled as
398 * told in Documentation/input/input-programming.txt */
399 if (test_bit(EV_ABS, dev->evbit)) {
400 retval = uinput_validate_absbits(dev);
401 if (retval < 0)
402 goto exit;
403 }
404
405 udev->state = UIST_SETUP_COMPLETE;
406 retval = count;
407
408 exit:
409 kfree(user_dev);
410 return retval;
411 }
412
413 static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count)
414 {
415 struct input_event ev;
416
417 if (count < input_event_size())
418 return -EINVAL;
419
420 if (input_event_from_user(buffer, &ev))
421 return -EFAULT;
422
423 input_event(udev->dev, ev.type, ev.code, ev.value);
424
425 return input_event_size();
426 }
427
428 static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
429 {
430 struct uinput_device *udev = file->private_data;
431 int retval;
432
433 retval = mutex_lock_interruptible(&udev->mutex);
434 if (retval)
435 return retval;
436
437 retval = udev->state == UIST_CREATED ?
438 uinput_inject_event(udev, buffer, count) :
439 uinput_setup_device(udev, buffer, count);
440
441 mutex_unlock(&udev->mutex);
442
443 return retval;
444 }
445
446 static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
447 {
448 struct uinput_device *udev = file->private_data;
449 int retval = 0;
450
451 if (udev->state != UIST_CREATED)
452 return -ENODEV;
453
454 if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK))
455 return -EAGAIN;
456
457 retval = wait_event_interruptible(udev->waitq,
458 udev->head != udev->tail || udev->state != UIST_CREATED);
459 if (retval)
460 return retval;
461
462 retval = mutex_lock_interruptible(&udev->mutex);
463 if (retval)
464 return retval;
465
466 if (udev->state != UIST_CREATED) {
467 retval = -ENODEV;
468 goto out;
469 }
470
471 while (udev->head != udev->tail && retval + input_event_size() <= count) {
472 if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) {
473 retval = -EFAULT;
474 goto out;
475 }
476 udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE;
477 retval += input_event_size();
478 }
479
480 out:
481 mutex_unlock(&udev->mutex);
482
483 return retval;
484 }
485
486 static unsigned int uinput_poll(struct file *file, poll_table *wait)
487 {
488 struct uinput_device *udev = file->private_data;
489
490 poll_wait(file, &udev->waitq, wait);
491
492 if (udev->head != udev->tail)
493 return POLLIN | POLLRDNORM;
494
495 return 0;
496 }
497
498 static int uinput_release(struct inode *inode, struct file *file)
499 {
500 struct uinput_device *udev = file->private_data;
501
502 uinput_destroy_device(udev);
503 kfree(udev);
504
505 return 0;
506 }
507
508 #ifdef CONFIG_COMPAT
509 struct uinput_ff_upload_compat {
510 int request_id;
511 int retval;
512 struct ff_effect_compat effect;
513 struct ff_effect_compat old;
514 };
515
516 static int uinput_ff_upload_to_user(char __user *buffer,
517 const struct uinput_ff_upload *ff_up)
518 {
519 if (INPUT_COMPAT_TEST) {
520 struct uinput_ff_upload_compat ff_up_compat;
521
522 ff_up_compat.request_id = ff_up->request_id;
523 ff_up_compat.retval = ff_up->retval;
524 /*
525 * It so happens that the pointer that gives us the trouble
526 * is the last field in the structure. Since we don't support
527 * custom waveforms in uinput anyway we can just copy the whole
528 * thing (to the compat size) and ignore the pointer.
529 */
530 memcpy(&ff_up_compat.effect, &ff_up->effect,
531 sizeof(struct ff_effect_compat));
532 memcpy(&ff_up_compat.old, &ff_up->old,
533 sizeof(struct ff_effect_compat));
534
535 if (copy_to_user(buffer, &ff_up_compat,
536 sizeof(struct uinput_ff_upload_compat)))
537 return -EFAULT;
538 } else {
539 if (copy_to_user(buffer, ff_up,
540 sizeof(struct uinput_ff_upload)))
541 return -EFAULT;
542 }
543
544 return 0;
545 }
546
547 static int uinput_ff_upload_from_user(const char __user *buffer,
548 struct uinput_ff_upload *ff_up)
549 {
550 if (INPUT_COMPAT_TEST) {
551 struct uinput_ff_upload_compat ff_up_compat;
552
553 if (copy_from_user(&ff_up_compat, buffer,
554 sizeof(struct uinput_ff_upload_compat)))
555 return -EFAULT;
556
557 ff_up->request_id = ff_up_compat.request_id;
558 ff_up->retval = ff_up_compat.retval;
559 memcpy(&ff_up->effect, &ff_up_compat.effect,
560 sizeof(struct ff_effect_compat));
561 memcpy(&ff_up->old, &ff_up_compat.old,
562 sizeof(struct ff_effect_compat));
563
564 } else {
565 if (copy_from_user(ff_up, buffer,
566 sizeof(struct uinput_ff_upload)))
567 return -EFAULT;
568 }
569
570 return 0;
571 }
572
573 #else
574
575 static int uinput_ff_upload_to_user(char __user *buffer,
576 const struct uinput_ff_upload *ff_up)
577 {
578 if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload)))
579 return -EFAULT;
580
581 return 0;
582 }
583
584 static int uinput_ff_upload_from_user(const char __user *buffer,
585 struct uinput_ff_upload *ff_up)
586 {
587 if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload)))
588 return -EFAULT;
589
590 return 0;
591 }
592
593 #endif
594
595 #define uinput_set_bit(_arg, _bit, _max) \
596 ({ \
597 int __ret = 0; \
598 if (udev->state == UIST_CREATED) \
599 __ret = -EINVAL; \
600 else if ((_arg) > (_max)) \
601 __ret = -EINVAL; \
602 else set_bit((_arg), udev->dev->_bit); \
603 __ret; \
604 })
605
606 static long uinput_ioctl_handler(struct file *file, unsigned int cmd,
607 unsigned long arg, void __user *p)
608 {
609 int retval;
610 struct uinput_device *udev = file->private_data;
611 struct uinput_ff_upload ff_up;
612 struct uinput_ff_erase ff_erase;
613 struct uinput_request *req;
614 int length;
615 char *phys;
616
617 retval = mutex_lock_interruptible(&udev->mutex);
618 if (retval)
619 return retval;
620
621 if (!udev->dev) {
622 retval = uinput_allocate_device(udev);
623 if (retval)
624 goto out;
625 }
626
627 switch (cmd) {
628 case UI_DEV_CREATE:
629 retval = uinput_create_device(udev);
630 break;
631
632 case UI_DEV_DESTROY:
633 uinput_destroy_device(udev);
634 break;
635
636 case UI_SET_EVBIT:
637 retval = uinput_set_bit(arg, evbit, EV_MAX);
638 break;
639
640 case UI_SET_KEYBIT:
641 retval = uinput_set_bit(arg, keybit, KEY_MAX);
642 break;
643
644 case UI_SET_RELBIT:
645 retval = uinput_set_bit(arg, relbit, REL_MAX);
646 break;
647
648 case UI_SET_ABSBIT:
649 retval = uinput_set_bit(arg, absbit, ABS_MAX);
650 break;
651
652 case UI_SET_MSCBIT:
653 retval = uinput_set_bit(arg, mscbit, MSC_MAX);
654 break;
655
656 case UI_SET_LEDBIT:
657 retval = uinput_set_bit(arg, ledbit, LED_MAX);
658 break;
659
660 case UI_SET_SNDBIT:
661 retval = uinput_set_bit(arg, sndbit, SND_MAX);
662 break;
663
664 case UI_SET_FFBIT:
665 retval = uinput_set_bit(arg, ffbit, FF_MAX);
666 break;
667
668 case UI_SET_SWBIT:
669 retval = uinput_set_bit(arg, swbit, SW_MAX);
670 break;
671
672 case UI_SET_PHYS:
673 if (udev->state == UIST_CREATED) {
674 retval = -EINVAL;
675 goto out;
676 }
677 length = strnlen_user(p, 1024);
678 if (length <= 0) {
679 retval = -EFAULT;
680 break;
681 }
682 kfree(udev->dev->phys);
683 udev->dev->phys = phys = kmalloc(length, GFP_KERNEL);
684 if (!phys) {
685 retval = -ENOMEM;
686 break;
687 }
688 if (copy_from_user(phys, p, length)) {
689 udev->dev->phys = NULL;
690 kfree(phys);
691 retval = -EFAULT;
692 break;
693 }
694 phys[length - 1] = '\0';
695 break;
696
697 case UI_BEGIN_FF_UPLOAD:
698 retval = uinput_ff_upload_from_user(p, &ff_up);
699 if (retval)
700 break;
701
702 req = uinput_request_find(udev, ff_up.request_id);
703 if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) {
704 retval = -EINVAL;
705 break;
706 }
707
708 ff_up.retval = 0;
709 ff_up.effect = *req->u.upload.effect;
710 if (req->u.upload.old)
711 ff_up.old = *req->u.upload.old;
712 else
713 memset(&ff_up.old, 0, sizeof(struct ff_effect));
714
715 retval = uinput_ff_upload_to_user(p, &ff_up);
716 break;
717
718 case UI_BEGIN_FF_ERASE:
719 if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) {
720 retval = -EFAULT;
721 break;
722 }
723
724 req = uinput_request_find(udev, ff_erase.request_id);
725 if (!req || req->code != UI_FF_ERASE) {
726 retval = -EINVAL;
727 break;
728 }
729
730 ff_erase.retval = 0;
731 ff_erase.effect_id = req->u.effect_id;
732 if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) {
733 retval = -EFAULT;
734 break;
735 }
736
737 break;
738
739 case UI_END_FF_UPLOAD:
740 retval = uinput_ff_upload_from_user(p, &ff_up);
741 if (retval)
742 break;
743
744 req = uinput_request_find(udev, ff_up.request_id);
745 if (!req || req->code != UI_FF_UPLOAD ||
746 !req->u.upload.effect) {
747 retval = -EINVAL;
748 break;
749 }
750
751 req->retval = ff_up.retval;
752 uinput_request_done(udev, req);
753 break;
754
755 case UI_END_FF_ERASE:
756 if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) {
757 retval = -EFAULT;
758 break;
759 }
760
761 req = uinput_request_find(udev, ff_erase.request_id);
762 if (!req || req->code != UI_FF_ERASE) {
763 retval = -EINVAL;
764 break;
765 }
766
767 req->retval = ff_erase.retval;
768 uinput_request_done(udev, req);
769 break;
770
771 default:
772 retval = -EINVAL;
773 }
774
775 out:
776 mutex_unlock(&udev->mutex);
777 return retval;
778 }
779
780 static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
781 {
782 return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg);
783 }
784
785 #ifdef CONFIG_COMPAT
786 static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
787 {
788 return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg));
789 }
790 #endif
791
792 static const struct file_operations uinput_fops = {
793 .owner = THIS_MODULE,
794 .open = uinput_open,
795 .release = uinput_release,
796 .read = uinput_read,
797 .write = uinput_write,
798 .poll = uinput_poll,
799 .unlocked_ioctl = uinput_ioctl,
800 #ifdef CONFIG_COMPAT
801 .compat_ioctl = uinput_compat_ioctl,
802 #endif
803 };
804
805 static struct miscdevice uinput_misc = {
806 .fops = &uinput_fops,
807 .minor = UINPUT_MINOR,
808 .name = UINPUT_NAME,
809 };
810
811 static int __init uinput_init(void)
812 {
813 return misc_register(&uinput_misc);
814 }
815
816 static void __exit uinput_exit(void)
817 {
818 misc_deregister(&uinput_misc);
819 }
820
821 MODULE_AUTHOR("Aristeu Sergio Rozanski Filho");
822 MODULE_DESCRIPTION("User level driver support for input subsystem");
823 MODULE_LICENSE("GPL");
824 MODULE_VERSION("0.3");
825
826 module_init(uinput_init);
827 module_exit(uinput_exit);
828
829
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