Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
da0c4901 JP |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
12 | ||
1da177e4 LT |
13 | #define EVDEV_MINOR_BASE 64 |
14 | #define EVDEV_MINORS 32 | |
63a6404d HR |
15 | #define EVDEV_MIN_BUFFER_SIZE 64U |
16 | #define EVDEV_BUF_PACKETS 8 | |
1da177e4 LT |
17 | |
18 | #include <linux/poll.h> | |
a99bbaf5 | 19 | #include <linux/sched.h> |
1da177e4 LT |
20 | #include <linux/slab.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
1cf0c6e6 | 23 | #include <linux/input/mt.h> |
1da177e4 | 24 | #include <linux/major.h> |
1da177e4 | 25 | #include <linux/device.h> |
7f8d4cad | 26 | #include <linux/cdev.h> |
2d56f3a3 | 27 | #include "input-compat.h" |
1da177e4 LT |
28 | |
29 | struct evdev { | |
1da177e4 | 30 | int open; |
1da177e4 LT |
31 | struct input_handle handle; |
32 | wait_queue_head_t wait; | |
2be85279 | 33 | struct evdev_client __rcu *grab; |
d0ffb9be | 34 | struct list_head client_list; |
6addb1d6 DT |
35 | spinlock_t client_lock; /* protects client_list */ |
36 | struct mutex mutex; | |
9657d75c | 37 | struct device dev; |
7f8d4cad | 38 | struct cdev cdev; |
20da92de | 39 | bool exist; |
1da177e4 LT |
40 | }; |
41 | ||
d0ffb9be | 42 | struct evdev_client { |
9fb0f14e JB |
43 | unsigned int head; |
44 | unsigned int tail; | |
cdda911c | 45 | unsigned int packet_head; /* [future] position of the first element of next packet */ |
6addb1d6 | 46 | spinlock_t buffer_lock; /* protects access to buffer, head and tail */ |
1da177e4 LT |
47 | struct fasync_struct *fasync; |
48 | struct evdev *evdev; | |
49 | struct list_head node; | |
a80b83b7 | 50 | int clkid; |
9fb0f14e | 51 | unsigned int bufsize; |
b58f7086 | 52 | struct input_event buffer[]; |
1da177e4 LT |
53 | }; |
54 | ||
a274ac15 HR |
55 | static void __pass_event(struct evdev_client *client, |
56 | const struct input_event *event) | |
6addb1d6 | 57 | { |
9fb0f14e JB |
58 | client->buffer[client->head++] = *event; |
59 | client->head &= client->bufsize - 1; | |
60 | ||
61 | if (unlikely(client->head == client->tail)) { | |
62 | /* | |
63 | * This effectively "drops" all unconsumed events, leaving | |
64 | * EV_SYN/SYN_DROPPED plus the newest event in the queue. | |
65 | */ | |
66 | client->tail = (client->head - 2) & (client->bufsize - 1); | |
67 | ||
68 | client->buffer[client->tail].time = event->time; | |
69 | client->buffer[client->tail].type = EV_SYN; | |
70 | client->buffer[client->tail].code = SYN_DROPPED; | |
71 | client->buffer[client->tail].value = 0; | |
9fb0f14e | 72 | |
cdda911c JB |
73 | client->packet_head = client->tail; |
74 | } | |
6addb1d6 | 75 | |
cdda911c JB |
76 | if (event->type == EV_SYN && event->code == SYN_REPORT) { |
77 | client->packet_head = client->head; | |
30a589fd | 78 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
cdda911c | 79 | } |
a274ac15 HR |
80 | } |
81 | ||
82 | static void evdev_pass_values(struct evdev_client *client, | |
83 | const struct input_value *vals, unsigned int count, | |
84 | ktime_t mono, ktime_t real) | |
85 | { | |
86 | struct evdev *evdev = client->evdev; | |
87 | const struct input_value *v; | |
88 | struct input_event event; | |
89 | bool wakeup = false; | |
90 | ||
91 | event.time = ktime_to_timeval(client->clkid == CLOCK_MONOTONIC ? | |
92 | mono : real); | |
93 | ||
94 | /* Interrupts are disabled, just acquire the lock. */ | |
95 | spin_lock(&client->buffer_lock); | |
96 | ||
97 | for (v = vals; v != vals + count; v++) { | |
98 | event.type = v->type; | |
99 | event.code = v->code; | |
100 | event.value = v->value; | |
101 | __pass_event(client, &event); | |
102 | if (v->type == EV_SYN && v->code == SYN_REPORT) | |
103 | wakeup = true; | |
104 | } | |
cdda911c JB |
105 | |
106 | spin_unlock(&client->buffer_lock); | |
a274ac15 HR |
107 | |
108 | if (wakeup) | |
109 | wake_up_interruptible(&evdev->wait); | |
6addb1d6 DT |
110 | } |
111 | ||
112 | /* | |
a274ac15 | 113 | * Pass incoming events to all connected clients. |
6addb1d6 | 114 | */ |
a274ac15 HR |
115 | static void evdev_events(struct input_handle *handle, |
116 | const struct input_value *vals, unsigned int count) | |
1da177e4 LT |
117 | { |
118 | struct evdev *evdev = handle->private; | |
d0ffb9be | 119 | struct evdev_client *client; |
a80b83b7 JS |
120 | ktime_t time_mono, time_real; |
121 | ||
122 | time_mono = ktime_get(); | |
123 | time_real = ktime_sub(time_mono, ktime_get_monotonic_offset()); | |
1da177e4 | 124 | |
82ba56c2 DT |
125 | rcu_read_lock(); |
126 | ||
6addb1d6 | 127 | client = rcu_dereference(evdev->grab); |
a80b83b7 | 128 | |
6addb1d6 | 129 | if (client) |
a274ac15 | 130 | evdev_pass_values(client, vals, count, time_mono, time_real); |
6addb1d6 DT |
131 | else |
132 | list_for_each_entry_rcu(client, &evdev->client_list, node) | |
a274ac15 HR |
133 | evdev_pass_values(client, vals, count, |
134 | time_mono, time_real); | |
1da177e4 | 135 | |
82ba56c2 | 136 | rcu_read_unlock(); |
a274ac15 | 137 | } |
82ba56c2 | 138 | |
a274ac15 HR |
139 | /* |
140 | * Pass incoming event to all connected clients. | |
141 | */ | |
142 | static void evdev_event(struct input_handle *handle, | |
143 | unsigned int type, unsigned int code, int value) | |
144 | { | |
145 | struct input_value vals[] = { { type, code, value } }; | |
146 | ||
147 | evdev_events(handle, vals, 1); | |
1da177e4 LT |
148 | } |
149 | ||
150 | static int evdev_fasync(int fd, struct file *file, int on) | |
151 | { | |
d0ffb9be | 152 | struct evdev_client *client = file->private_data; |
1e0afb28 | 153 | |
60aa4924 | 154 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
155 | } |
156 | ||
1e0afb28 | 157 | static int evdev_flush(struct file *file, fl_owner_t id) |
1da177e4 | 158 | { |
d0ffb9be DT |
159 | struct evdev_client *client = file->private_data; |
160 | struct evdev *evdev = client->evdev; | |
6addb1d6 DT |
161 | int retval; |
162 | ||
163 | retval = mutex_lock_interruptible(&evdev->mutex); | |
164 | if (retval) | |
165 | return retval; | |
1e0afb28 | 166 | |
d0ffb9be | 167 | if (!evdev->exist) |
6addb1d6 DT |
168 | retval = -ENODEV; |
169 | else | |
170 | retval = input_flush_device(&evdev->handle, file); | |
1e0afb28 | 171 | |
6addb1d6 DT |
172 | mutex_unlock(&evdev->mutex); |
173 | return retval; | |
1da177e4 LT |
174 | } |
175 | ||
9657d75c | 176 | static void evdev_free(struct device *dev) |
1da177e4 | 177 | { |
9657d75c DT |
178 | struct evdev *evdev = container_of(dev, struct evdev, dev); |
179 | ||
a7097ff8 | 180 | input_put_device(evdev->handle.dev); |
1da177e4 LT |
181 | kfree(evdev); |
182 | } | |
183 | ||
6addb1d6 DT |
184 | /* |
185 | * Grabs an event device (along with underlying input device). | |
186 | * This function is called with evdev->mutex taken. | |
187 | */ | |
188 | static int evdev_grab(struct evdev *evdev, struct evdev_client *client) | |
189 | { | |
190 | int error; | |
191 | ||
192 | if (evdev->grab) | |
193 | return -EBUSY; | |
194 | ||
195 | error = input_grab_device(&evdev->handle); | |
196 | if (error) | |
197 | return error; | |
198 | ||
199 | rcu_assign_pointer(evdev->grab, client); | |
6addb1d6 DT |
200 | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static int evdev_ungrab(struct evdev *evdev, struct evdev_client *client) | |
205 | { | |
dba42580 DT |
206 | struct evdev_client *grab = rcu_dereference_protected(evdev->grab, |
207 | lockdep_is_held(&evdev->mutex)); | |
208 | ||
209 | if (grab != client) | |
6addb1d6 DT |
210 | return -EINVAL; |
211 | ||
212 | rcu_assign_pointer(evdev->grab, NULL); | |
82ba56c2 | 213 | synchronize_rcu(); |
6addb1d6 DT |
214 | input_release_device(&evdev->handle); |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | static void evdev_attach_client(struct evdev *evdev, | |
220 | struct evdev_client *client) | |
221 | { | |
222 | spin_lock(&evdev->client_lock); | |
223 | list_add_tail_rcu(&client->node, &evdev->client_list); | |
224 | spin_unlock(&evdev->client_lock); | |
6addb1d6 DT |
225 | } |
226 | ||
227 | static void evdev_detach_client(struct evdev *evdev, | |
228 | struct evdev_client *client) | |
229 | { | |
230 | spin_lock(&evdev->client_lock); | |
231 | list_del_rcu(&client->node); | |
232 | spin_unlock(&evdev->client_lock); | |
82ba56c2 | 233 | synchronize_rcu(); |
6addb1d6 DT |
234 | } |
235 | ||
236 | static int evdev_open_device(struct evdev *evdev) | |
237 | { | |
238 | int retval; | |
239 | ||
240 | retval = mutex_lock_interruptible(&evdev->mutex); | |
241 | if (retval) | |
242 | return retval; | |
243 | ||
244 | if (!evdev->exist) | |
245 | retval = -ENODEV; | |
06445014 | 246 | else if (!evdev->open++) { |
6addb1d6 | 247 | retval = input_open_device(&evdev->handle); |
06445014 ON |
248 | if (retval) |
249 | evdev->open--; | |
250 | } | |
6addb1d6 DT |
251 | |
252 | mutex_unlock(&evdev->mutex); | |
253 | return retval; | |
254 | } | |
255 | ||
256 | static void evdev_close_device(struct evdev *evdev) | |
257 | { | |
258 | mutex_lock(&evdev->mutex); | |
259 | ||
260 | if (evdev->exist && !--evdev->open) | |
261 | input_close_device(&evdev->handle); | |
262 | ||
263 | mutex_unlock(&evdev->mutex); | |
264 | } | |
265 | ||
266 | /* | |
267 | * Wake up users waiting for IO so they can disconnect from | |
268 | * dead device. | |
269 | */ | |
270 | static void evdev_hangup(struct evdev *evdev) | |
271 | { | |
272 | struct evdev_client *client; | |
273 | ||
274 | spin_lock(&evdev->client_lock); | |
275 | list_for_each_entry(client, &evdev->client_list, node) | |
276 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
277 | spin_unlock(&evdev->client_lock); | |
278 | ||
279 | wake_up_interruptible(&evdev->wait); | |
280 | } | |
281 | ||
d0ffb9be | 282 | static int evdev_release(struct inode *inode, struct file *file) |
1da177e4 | 283 | { |
d0ffb9be DT |
284 | struct evdev_client *client = file->private_data; |
285 | struct evdev *evdev = client->evdev; | |
1da177e4 | 286 | |
6addb1d6 | 287 | mutex_lock(&evdev->mutex); |
dba42580 | 288 | evdev_ungrab(evdev, client); |
6addb1d6 | 289 | mutex_unlock(&evdev->mutex); |
1da177e4 | 290 | |
6addb1d6 | 291 | evdev_detach_client(evdev, client); |
d0ffb9be | 292 | kfree(client); |
1da177e4 | 293 | |
6addb1d6 | 294 | evdev_close_device(evdev); |
9657d75c | 295 | put_device(&evdev->dev); |
1da177e4 | 296 | |
1da177e4 LT |
297 | return 0; |
298 | } | |
299 | ||
b58f7086 HR |
300 | static unsigned int evdev_compute_buffer_size(struct input_dev *dev) |
301 | { | |
63a6404d HR |
302 | unsigned int n_events = |
303 | max(dev->hint_events_per_packet * EVDEV_BUF_PACKETS, | |
304 | EVDEV_MIN_BUFFER_SIZE); | |
305 | ||
306 | return roundup_pow_of_two(n_events); | |
b58f7086 HR |
307 | } |
308 | ||
d0ffb9be | 309 | static int evdev_open(struct inode *inode, struct file *file) |
1da177e4 | 310 | { |
7f8d4cad DT |
311 | struct evdev *evdev = container_of(inode->i_cdev, struct evdev, cdev); |
312 | unsigned int bufsize = evdev_compute_buffer_size(evdev->handle.dev); | |
6addb1d6 | 313 | struct evdev_client *client; |
d542ed82 | 314 | int error; |
1da177e4 | 315 | |
b58f7086 HR |
316 | client = kzalloc(sizeof(struct evdev_client) + |
317 | bufsize * sizeof(struct input_event), | |
318 | GFP_KERNEL); | |
7f8d4cad DT |
319 | if (!client) |
320 | return -ENOMEM; | |
1da177e4 | 321 | |
b58f7086 | 322 | client->bufsize = bufsize; |
6addb1d6 | 323 | spin_lock_init(&client->buffer_lock); |
d0ffb9be | 324 | client->evdev = evdev; |
6addb1d6 | 325 | evdev_attach_client(evdev, client); |
1da177e4 | 326 | |
6addb1d6 DT |
327 | error = evdev_open_device(evdev); |
328 | if (error) | |
329 | goto err_free_client; | |
1da177e4 | 330 | |
d0ffb9be | 331 | file->private_data = client; |
3d7bbd45 DT |
332 | nonseekable_open(inode, file); |
333 | ||
7f8d4cad | 334 | get_device(&evdev->dev); |
1da177e4 | 335 | return 0; |
9657d75c DT |
336 | |
337 | err_free_client: | |
6addb1d6 | 338 | evdev_detach_client(evdev, client); |
9657d75c | 339 | kfree(client); |
9657d75c | 340 | return error; |
1da177e4 LT |
341 | } |
342 | ||
6addb1d6 DT |
343 | static ssize_t evdev_write(struct file *file, const char __user *buffer, |
344 | size_t count, loff_t *ppos) | |
3a51f7c4 | 345 | { |
d0ffb9be DT |
346 | struct evdev_client *client = file->private_data; |
347 | struct evdev *evdev = client->evdev; | |
3a51f7c4 | 348 | struct input_event event; |
02dfc496 | 349 | int retval = 0; |
52658bb6 | 350 | |
2872a9b5 | 351 | if (count != 0 && count < input_event_size()) |
439581ec PK |
352 | return -EINVAL; |
353 | ||
6addb1d6 DT |
354 | retval = mutex_lock_interruptible(&evdev->mutex); |
355 | if (retval) | |
356 | return retval; | |
357 | ||
358 | if (!evdev->exist) { | |
359 | retval = -ENODEV; | |
360 | goto out; | |
361 | } | |
52658bb6 | 362 | |
2872a9b5 DT |
363 | while (retval + input_event_size() <= count) { |
364 | ||
2d56f3a3 | 365 | if (input_event_from_user(buffer + retval, &event)) { |
6addb1d6 DT |
366 | retval = -EFAULT; |
367 | goto out; | |
368 | } | |
439581ec | 369 | retval += input_event_size(); |
6addb1d6 DT |
370 | |
371 | input_inject_event(&evdev->handle, | |
372 | event.type, event.code, event.value); | |
2872a9b5 | 373 | } |
52658bb6 | 374 | |
6addb1d6 DT |
375 | out: |
376 | mutex_unlock(&evdev->mutex); | |
52658bb6 JK |
377 | return retval; |
378 | } | |
52658bb6 | 379 | |
6addb1d6 DT |
380 | static int evdev_fetch_next_event(struct evdev_client *client, |
381 | struct input_event *event) | |
382 | { | |
383 | int have_event; | |
384 | ||
385 | spin_lock_irq(&client->buffer_lock); | |
386 | ||
566cf5b6 | 387 | have_event = client->packet_head != client->tail; |
6addb1d6 DT |
388 | if (have_event) { |
389 | *event = client->buffer[client->tail++]; | |
b58f7086 | 390 | client->tail &= client->bufsize - 1; |
6addb1d6 DT |
391 | } |
392 | ||
393 | spin_unlock_irq(&client->buffer_lock); | |
394 | ||
395 | return have_event; | |
396 | } | |
397 | ||
398 | static ssize_t evdev_read(struct file *file, char __user *buffer, | |
399 | size_t count, loff_t *ppos) | |
1da177e4 | 400 | { |
d0ffb9be DT |
401 | struct evdev_client *client = file->private_data; |
402 | struct evdev *evdev = client->evdev; | |
6addb1d6 | 403 | struct input_event event; |
2872a9b5 DT |
404 | size_t read = 0; |
405 | int error; | |
1da177e4 | 406 | |
2872a9b5 | 407 | if (count != 0 && count < input_event_size()) |
1da177e4 LT |
408 | return -EINVAL; |
409 | ||
2872a9b5 DT |
410 | for (;;) { |
411 | if (!evdev->exist) | |
412 | return -ENODEV; | |
1da177e4 | 413 | |
2872a9b5 DT |
414 | if (client->packet_head == client->tail && |
415 | (file->f_flags & O_NONBLOCK)) | |
416 | return -EAGAIN; | |
417 | ||
418 | /* | |
419 | * count == 0 is special - no IO is done but we check | |
420 | * for error conditions (see above). | |
421 | */ | |
422 | if (count == 0) | |
423 | break; | |
1da177e4 | 424 | |
2872a9b5 DT |
425 | while (read + input_event_size() <= count && |
426 | evdev_fetch_next_event(client, &event)) { | |
3a51f7c4 | 427 | |
2872a9b5 DT |
428 | if (input_event_to_user(buffer + read, &event)) |
429 | return -EFAULT; | |
3a51f7c4 | 430 | |
2872a9b5 DT |
431 | read += input_event_size(); |
432 | } | |
1da177e4 | 433 | |
2872a9b5 DT |
434 | if (read) |
435 | break; | |
e90f869c | 436 | |
2872a9b5 DT |
437 | if (!(file->f_flags & O_NONBLOCK)) { |
438 | error = wait_event_interruptible(evdev->wait, | |
439 | client->packet_head != client->tail || | |
440 | !evdev->exist); | |
441 | if (error) | |
442 | return error; | |
443 | } | |
444 | } | |
445 | ||
446 | return read; | |
1da177e4 LT |
447 | } |
448 | ||
449 | /* No kernel lock - fine */ | |
450 | static unsigned int evdev_poll(struct file *file, poll_table *wait) | |
451 | { | |
d0ffb9be DT |
452 | struct evdev_client *client = file->private_data; |
453 | struct evdev *evdev = client->evdev; | |
c18fb139 | 454 | unsigned int mask; |
1e0afb28 | 455 | |
d0ffb9be | 456 | poll_wait(file, &evdev->wait, wait); |
c18fb139 DT |
457 | |
458 | mask = evdev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR; | |
cdda911c | 459 | if (client->packet_head != client->tail) |
c18fb139 DT |
460 | mask |= POLLIN | POLLRDNORM; |
461 | ||
462 | return mask; | |
1da177e4 LT |
463 | } |
464 | ||
3a51f7c4 DT |
465 | #ifdef CONFIG_COMPAT |
466 | ||
467 | #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8) | |
7b19ada2 | 468 | #define BITS_TO_LONGS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1) |
3a51f7c4 DT |
469 | |
470 | #ifdef __BIG_ENDIAN | |
471 | static int bits_to_user(unsigned long *bits, unsigned int maxbit, | |
472 | unsigned int maxlen, void __user *p, int compat) | |
473 | { | |
474 | int len, i; | |
475 | ||
476 | if (compat) { | |
7b19ada2 | 477 | len = BITS_TO_LONGS_COMPAT(maxbit) * sizeof(compat_long_t); |
bf61f8d3 | 478 | if (len > maxlen) |
3a51f7c4 DT |
479 | len = maxlen; |
480 | ||
481 | for (i = 0; i < len / sizeof(compat_long_t); i++) | |
482 | if (copy_to_user((compat_long_t __user *) p + i, | |
483 | (compat_long_t *) bits + | |
484 | i + 1 - ((i % 2) << 1), | |
485 | sizeof(compat_long_t))) | |
486 | return -EFAULT; | |
487 | } else { | |
7b19ada2 | 488 | len = BITS_TO_LONGS(maxbit) * sizeof(long); |
3a51f7c4 DT |
489 | if (len > maxlen) |
490 | len = maxlen; | |
491 | ||
492 | if (copy_to_user(p, bits, len)) | |
493 | return -EFAULT; | |
494 | } | |
495 | ||
496 | return len; | |
497 | } | |
498 | #else | |
499 | static int bits_to_user(unsigned long *bits, unsigned int maxbit, | |
500 | unsigned int maxlen, void __user *p, int compat) | |
501 | { | |
502 | int len = compat ? | |
7b19ada2 JS |
503 | BITS_TO_LONGS_COMPAT(maxbit) * sizeof(compat_long_t) : |
504 | BITS_TO_LONGS(maxbit) * sizeof(long); | |
3a51f7c4 DT |
505 | |
506 | if (len > maxlen) | |
507 | len = maxlen; | |
508 | ||
509 | return copy_to_user(p, bits, len) ? -EFAULT : len; | |
510 | } | |
511 | #endif /* __BIG_ENDIAN */ | |
512 | ||
513 | #else | |
514 | ||
515 | static int bits_to_user(unsigned long *bits, unsigned int maxbit, | |
516 | unsigned int maxlen, void __user *p, int compat) | |
517 | { | |
7b19ada2 | 518 | int len = BITS_TO_LONGS(maxbit) * sizeof(long); |
3a51f7c4 DT |
519 | |
520 | if (len > maxlen) | |
521 | len = maxlen; | |
522 | ||
523 | return copy_to_user(p, bits, len) ? -EFAULT : len; | |
524 | } | |
525 | ||
526 | #endif /* CONFIG_COMPAT */ | |
527 | ||
528 | static int str_to_user(const char *str, unsigned int maxlen, void __user *p) | |
529 | { | |
530 | int len; | |
531 | ||
532 | if (!str) | |
533 | return -ENOENT; | |
534 | ||
535 | len = strlen(str) + 1; | |
536 | if (len > maxlen) | |
537 | len = maxlen; | |
538 | ||
539 | return copy_to_user(p, str, len) ? -EFAULT : len; | |
540 | } | |
541 | ||
f2afa771 | 542 | #define OLD_KEY_MAX 0x1ff |
448cd166 DT |
543 | static int handle_eviocgbit(struct input_dev *dev, |
544 | unsigned int type, unsigned int size, | |
545 | void __user *p, int compat_mode) | |
5402a734 | 546 | { |
f2afa771 | 547 | static unsigned long keymax_warn_time; |
5402a734 LT |
548 | unsigned long *bits; |
549 | int len; | |
550 | ||
448cd166 | 551 | switch (type) { |
5402a734 LT |
552 | |
553 | case 0: bits = dev->evbit; len = EV_MAX; break; | |
554 | case EV_KEY: bits = dev->keybit; len = KEY_MAX; break; | |
555 | case EV_REL: bits = dev->relbit; len = REL_MAX; break; | |
556 | case EV_ABS: bits = dev->absbit; len = ABS_MAX; break; | |
557 | case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break; | |
558 | case EV_LED: bits = dev->ledbit; len = LED_MAX; break; | |
559 | case EV_SND: bits = dev->sndbit; len = SND_MAX; break; | |
560 | case EV_FF: bits = dev->ffbit; len = FF_MAX; break; | |
561 | case EV_SW: bits = dev->swbit; len = SW_MAX; break; | |
562 | default: return -EINVAL; | |
563 | } | |
f2afa771 DT |
564 | |
565 | /* | |
566 | * Work around bugs in userspace programs that like to do | |
567 | * EVIOCGBIT(EV_KEY, KEY_MAX) and not realize that 'len' | |
568 | * should be in bytes, not in bits. | |
569 | */ | |
448cd166 | 570 | if (type == EV_KEY && size == OLD_KEY_MAX) { |
f2afa771 DT |
571 | len = OLD_KEY_MAX; |
572 | if (printk_timed_ratelimit(&keymax_warn_time, 10 * 1000)) | |
da0c4901 JP |
573 | pr_warning("(EVIOCGBIT): Suspicious buffer size %u, " |
574 | "limiting output to %zu bytes. See " | |
575 | "http://userweb.kernel.org/~dtor/eviocgbit-bug.html\n", | |
576 | OLD_KEY_MAX, | |
577 | BITS_TO_LONGS(OLD_KEY_MAX) * sizeof(long)); | |
f2afa771 DT |
578 | } |
579 | ||
448cd166 | 580 | return bits_to_user(bits, len, size, p, compat_mode); |
5402a734 | 581 | } |
f2afa771 | 582 | #undef OLD_KEY_MAX |
5402a734 | 583 | |
ab4e0192 | 584 | static int evdev_handle_get_keycode(struct input_dev *dev, void __user *p) |
8613e4c2 | 585 | { |
ab4e0192 DT |
586 | struct input_keymap_entry ke = { |
587 | .len = sizeof(unsigned int), | |
588 | .flags = 0, | |
589 | }; | |
590 | int __user *ip = (int __user *)p; | |
8613e4c2 MCC |
591 | int error; |
592 | ||
ab4e0192 DT |
593 | /* legacy case */ |
594 | if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) | |
595 | return -EFAULT; | |
8613e4c2 | 596 | |
ab4e0192 DT |
597 | error = input_get_keycode(dev, &ke); |
598 | if (error) | |
599 | return error; | |
8613e4c2 | 600 | |
ab4e0192 DT |
601 | if (put_user(ke.keycode, ip + 1)) |
602 | return -EFAULT; | |
8613e4c2 | 603 | |
ab4e0192 DT |
604 | return 0; |
605 | } | |
8613e4c2 | 606 | |
ab4e0192 DT |
607 | static int evdev_handle_get_keycode_v2(struct input_dev *dev, void __user *p) |
608 | { | |
609 | struct input_keymap_entry ke; | |
610 | int error; | |
8613e4c2 | 611 | |
ab4e0192 DT |
612 | if (copy_from_user(&ke, p, sizeof(ke))) |
613 | return -EFAULT; | |
8613e4c2 | 614 | |
ab4e0192 DT |
615 | error = input_get_keycode(dev, &ke); |
616 | if (error) | |
617 | return error; | |
8613e4c2 | 618 | |
ab4e0192 DT |
619 | if (copy_to_user(p, &ke, sizeof(ke))) |
620 | return -EFAULT; | |
8613e4c2 | 621 | |
8613e4c2 MCC |
622 | return 0; |
623 | } | |
624 | ||
ab4e0192 | 625 | static int evdev_handle_set_keycode(struct input_dev *dev, void __user *p) |
8613e4c2 | 626 | { |
ab4e0192 DT |
627 | struct input_keymap_entry ke = { |
628 | .len = sizeof(unsigned int), | |
629 | .flags = 0, | |
630 | }; | |
631 | int __user *ip = (int __user *)p; | |
8613e4c2 | 632 | |
ab4e0192 DT |
633 | if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) |
634 | return -EFAULT; | |
8613e4c2 | 635 | |
ab4e0192 DT |
636 | if (get_user(ke.keycode, ip + 1)) |
637 | return -EFAULT; | |
8613e4c2 | 638 | |
ab4e0192 DT |
639 | return input_set_keycode(dev, &ke); |
640 | } | |
8613e4c2 | 641 | |
ab4e0192 DT |
642 | static int evdev_handle_set_keycode_v2(struct input_dev *dev, void __user *p) |
643 | { | |
644 | struct input_keymap_entry ke; | |
8613e4c2 | 645 | |
ab4e0192 DT |
646 | if (copy_from_user(&ke, p, sizeof(ke))) |
647 | return -EFAULT; | |
8613e4c2 | 648 | |
ab4e0192 DT |
649 | if (ke.len > sizeof(ke.scancode)) |
650 | return -EINVAL; | |
8613e4c2 MCC |
651 | |
652 | return input_set_keycode(dev, &ke); | |
653 | } | |
654 | ||
1cf0c6e6 HR |
655 | static int evdev_handle_mt_request(struct input_dev *dev, |
656 | unsigned int size, | |
657 | int __user *ip) | |
658 | { | |
8d18fba2 | 659 | const struct input_mt *mt = dev->mt; |
1cf0c6e6 HR |
660 | unsigned int code; |
661 | int max_slots; | |
662 | int i; | |
663 | ||
664 | if (get_user(code, &ip[0])) | |
665 | return -EFAULT; | |
8d18fba2 | 666 | if (!mt || !input_is_mt_value(code)) |
1cf0c6e6 HR |
667 | return -EINVAL; |
668 | ||
669 | max_slots = (size - sizeof(__u32)) / sizeof(__s32); | |
8d18fba2 HR |
670 | for (i = 0; i < mt->num_slots && i < max_slots; i++) { |
671 | int value = input_mt_get_value(&mt->slots[i], code); | |
672 | if (put_user(value, &ip[1 + i])) | |
1cf0c6e6 | 673 | return -EFAULT; |
8d18fba2 | 674 | } |
1cf0c6e6 HR |
675 | |
676 | return 0; | |
677 | } | |
678 | ||
6addb1d6 DT |
679 | static long evdev_do_ioctl(struct file *file, unsigned int cmd, |
680 | void __user *p, int compat_mode) | |
1da177e4 | 681 | { |
d0ffb9be DT |
682 | struct evdev_client *client = file->private_data; |
683 | struct evdev *evdev = client->evdev; | |
1da177e4 LT |
684 | struct input_dev *dev = evdev->handle.dev; |
685 | struct input_absinfo abs; | |
509ca1a9 | 686 | struct ff_effect effect; |
3a51f7c4 | 687 | int __user *ip = (int __user *)p; |
58b93995 | 688 | unsigned int i, t, u, v; |
448cd166 | 689 | unsigned int size; |
509ca1a9 | 690 | int error; |
1da177e4 | 691 | |
448cd166 | 692 | /* First we check for fixed-length commands */ |
1da177e4 LT |
693 | switch (cmd) { |
694 | ||
6addb1d6 DT |
695 | case EVIOCGVERSION: |
696 | return put_user(EV_VERSION, ip); | |
1da177e4 | 697 | |
6addb1d6 DT |
698 | case EVIOCGID: |
699 | if (copy_to_user(p, &dev->id, sizeof(struct input_id))) | |
700 | return -EFAULT; | |
701 | return 0; | |
08791e5c | 702 | |
6addb1d6 DT |
703 | case EVIOCGREP: |
704 | if (!test_bit(EV_REP, dev->evbit)) | |
705 | return -ENOSYS; | |
706 | if (put_user(dev->rep[REP_DELAY], ip)) | |
707 | return -EFAULT; | |
708 | if (put_user(dev->rep[REP_PERIOD], ip + 1)) | |
709 | return -EFAULT; | |
710 | return 0; | |
08791e5c | 711 | |
6addb1d6 DT |
712 | case EVIOCSREP: |
713 | if (!test_bit(EV_REP, dev->evbit)) | |
714 | return -ENOSYS; | |
715 | if (get_user(u, ip)) | |
716 | return -EFAULT; | |
717 | if (get_user(v, ip + 1)) | |
718 | return -EFAULT; | |
08791e5c | 719 | |
6addb1d6 DT |
720 | input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u); |
721 | input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v); | |
3a51f7c4 | 722 | |
6addb1d6 | 723 | return 0; |
1da177e4 | 724 | |
6addb1d6 DT |
725 | case EVIOCRMFF: |
726 | return input_ff_erase(dev, (int)(unsigned long) p, file); | |
1da177e4 | 727 | |
6addb1d6 DT |
728 | case EVIOCGEFFECTS: |
729 | i = test_bit(EV_FF, dev->evbit) ? | |
730 | dev->ff->max_effects : 0; | |
731 | if (put_user(i, ip)) | |
732 | return -EFAULT; | |
733 | return 0; | |
734 | ||
735 | case EVIOCGRAB: | |
736 | if (p) | |
737 | return evdev_grab(evdev, client); | |
738 | else | |
739 | return evdev_ungrab(evdev, client); | |
ab4e0192 | 740 | |
a80b83b7 JS |
741 | case EVIOCSCLOCKID: |
742 | if (copy_from_user(&i, p, sizeof(unsigned int))) | |
743 | return -EFAULT; | |
744 | if (i != CLOCK_MONOTONIC && i != CLOCK_REALTIME) | |
745 | return -EINVAL; | |
746 | client->clkid = i; | |
747 | return 0; | |
748 | ||
ab4e0192 DT |
749 | case EVIOCGKEYCODE: |
750 | return evdev_handle_get_keycode(dev, p); | |
751 | ||
752 | case EVIOCSKEYCODE: | |
753 | return evdev_handle_set_keycode(dev, p); | |
754 | ||
755 | case EVIOCGKEYCODE_V2: | |
756 | return evdev_handle_get_keycode_v2(dev, p); | |
757 | ||
758 | case EVIOCSKEYCODE_V2: | |
759 | return evdev_handle_set_keycode_v2(dev, p); | |
448cd166 | 760 | } |
1da177e4 | 761 | |
448cd166 | 762 | size = _IOC_SIZE(cmd); |
1da177e4 | 763 | |
448cd166 DT |
764 | /* Now check variable-length commands */ |
765 | #define EVIOC_MASK_SIZE(nr) ((nr) & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) | |
448cd166 | 766 | switch (EVIOC_MASK_SIZE(cmd)) { |
41e979f8 | 767 | |
85b77200 HR |
768 | case EVIOCGPROP(0): |
769 | return bits_to_user(dev->propbit, INPUT_PROP_MAX, | |
770 | size, p, compat_mode); | |
771 | ||
1cf0c6e6 HR |
772 | case EVIOCGMTSLOTS(0): |
773 | return evdev_handle_mt_request(dev, size, ip); | |
774 | ||
448cd166 DT |
775 | case EVIOCGKEY(0): |
776 | return bits_to_user(dev->key, KEY_MAX, size, p, compat_mode); | |
1da177e4 | 777 | |
448cd166 DT |
778 | case EVIOCGLED(0): |
779 | return bits_to_user(dev->led, LED_MAX, size, p, compat_mode); | |
1da177e4 | 780 | |
448cd166 DT |
781 | case EVIOCGSND(0): |
782 | return bits_to_user(dev->snd, SND_MAX, size, p, compat_mode); | |
1da177e4 | 783 | |
448cd166 DT |
784 | case EVIOCGSW(0): |
785 | return bits_to_user(dev->sw, SW_MAX, size, p, compat_mode); | |
31581066 | 786 | |
448cd166 DT |
787 | case EVIOCGNAME(0): |
788 | return str_to_user(dev->name, size, p); | |
1da177e4 | 789 | |
448cd166 DT |
790 | case EVIOCGPHYS(0): |
791 | return str_to_user(dev->phys, size, p); | |
1da177e4 | 792 | |
448cd166 DT |
793 | case EVIOCGUNIQ(0): |
794 | return str_to_user(dev->uniq, size, p); | |
1da177e4 | 795 | |
448cd166 DT |
796 | case EVIOC_MASK_SIZE(EVIOCSFF): |
797 | if (input_ff_effect_from_user(p, size, &effect)) | |
798 | return -EFAULT; | |
1da177e4 | 799 | |
448cd166 | 800 | error = input_ff_upload(dev, &effect, file); |
1da177e4 | 801 | |
448cd166 DT |
802 | if (put_user(effect.id, &(((struct ff_effect __user *)p)->id))) |
803 | return -EFAULT; | |
41e979f8 | 804 | |
448cd166 DT |
805 | return error; |
806 | } | |
1da177e4 | 807 | |
448cd166 DT |
808 | /* Multi-number variable-length handlers */ |
809 | if (_IOC_TYPE(cmd) != 'E') | |
810 | return -EINVAL; | |
1da177e4 | 811 | |
448cd166 | 812 | if (_IOC_DIR(cmd) == _IOC_READ) { |
6addb1d6 | 813 | |
448cd166 DT |
814 | if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0, 0))) |
815 | return handle_eviocgbit(dev, | |
816 | _IOC_NR(cmd) & EV_MAX, size, | |
817 | p, compat_mode); | |
1da177e4 | 818 | |
448cd166 | 819 | if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) { |
f2278f31 | 820 | |
0a74a1df DM |
821 | if (!dev->absinfo) |
822 | return -EINVAL; | |
823 | ||
448cd166 DT |
824 | t = _IOC_NR(cmd) & ABS_MAX; |
825 | abs = dev->absinfo[t]; | |
f2278f31 | 826 | |
448cd166 DT |
827 | if (copy_to_user(p, &abs, min_t(size_t, |
828 | size, sizeof(struct input_absinfo)))) | |
829 | return -EFAULT; | |
f2278f31 | 830 | |
448cd166 DT |
831 | return 0; |
832 | } | |
833 | } | |
f2278f31 | 834 | |
f9ce6eb5 | 835 | if (_IOC_DIR(cmd) == _IOC_WRITE) { |
f2278f31 | 836 | |
448cd166 | 837 | if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) { |
1da177e4 | 838 | |
0a74a1df DM |
839 | if (!dev->absinfo) |
840 | return -EINVAL; | |
841 | ||
448cd166 | 842 | t = _IOC_NR(cmd) & ABS_MAX; |
41e979f8 | 843 | |
448cd166 DT |
844 | if (copy_from_user(&abs, p, min_t(size_t, |
845 | size, sizeof(struct input_absinfo)))) | |
846 | return -EFAULT; | |
1da177e4 | 847 | |
448cd166 DT |
848 | if (size < sizeof(struct input_absinfo)) |
849 | abs.resolution = 0; | |
d31b2865 | 850 | |
448cd166 DT |
851 | /* We can't change number of reserved MT slots */ |
852 | if (t == ABS_MT_SLOT) | |
853 | return -EINVAL; | |
40d007e7 | 854 | |
448cd166 DT |
855 | /* |
856 | * Take event lock to ensure that we are not | |
857 | * changing device parameters in the middle | |
858 | * of event. | |
859 | */ | |
860 | spin_lock_irq(&dev->event_lock); | |
861 | dev->absinfo[t] = abs; | |
862 | spin_unlock_irq(&dev->event_lock); | |
6addb1d6 | 863 | |
448cd166 | 864 | return 0; |
6addb1d6 | 865 | } |
1da177e4 | 866 | } |
448cd166 | 867 | |
1da177e4 LT |
868 | return -EINVAL; |
869 | } | |
1da177e4 | 870 | |
6addb1d6 DT |
871 | static long evdev_ioctl_handler(struct file *file, unsigned int cmd, |
872 | void __user *p, int compat_mode) | |
873 | { | |
874 | struct evdev_client *client = file->private_data; | |
875 | struct evdev *evdev = client->evdev; | |
876 | int retval; | |
877 | ||
878 | retval = mutex_lock_interruptible(&evdev->mutex); | |
879 | if (retval) | |
880 | return retval; | |
881 | ||
882 | if (!evdev->exist) { | |
883 | retval = -ENODEV; | |
884 | goto out; | |
885 | } | |
886 | ||
887 | retval = evdev_do_ioctl(file, cmd, p, compat_mode); | |
888 | ||
889 | out: | |
890 | mutex_unlock(&evdev->mutex); | |
891 | return retval; | |
892 | } | |
893 | ||
3a51f7c4 DT |
894 | static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
895 | { | |
896 | return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0); | |
897 | } | |
41e979f8 | 898 | |
3a51f7c4 | 899 | #ifdef CONFIG_COMPAT |
6addb1d6 DT |
900 | static long evdev_ioctl_compat(struct file *file, |
901 | unsigned int cmd, unsigned long arg) | |
52658bb6 | 902 | { |
3a51f7c4 | 903 | return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1); |
1da177e4 | 904 | } |
52658bb6 | 905 | #endif |
1da177e4 | 906 | |
66e66118 | 907 | static const struct file_operations evdev_fops = { |
6addb1d6 DT |
908 | .owner = THIS_MODULE, |
909 | .read = evdev_read, | |
910 | .write = evdev_write, | |
911 | .poll = evdev_poll, | |
912 | .open = evdev_open, | |
913 | .release = evdev_release, | |
914 | .unlocked_ioctl = evdev_ioctl, | |
52658bb6 | 915 | #ifdef CONFIG_COMPAT |
6addb1d6 | 916 | .compat_ioctl = evdev_ioctl_compat, |
52658bb6 | 917 | #endif |
6addb1d6 | 918 | .fasync = evdev_fasync, |
6038f373 AB |
919 | .flush = evdev_flush, |
920 | .llseek = no_llseek, | |
1da177e4 LT |
921 | }; |
922 | ||
6addb1d6 DT |
923 | /* |
924 | * Mark device non-existent. This disables writes, ioctls and | |
925 | * prevents new users from opening the device. Already posted | |
926 | * blocking reads will stay, however new ones will fail. | |
927 | */ | |
928 | static void evdev_mark_dead(struct evdev *evdev) | |
929 | { | |
930 | mutex_lock(&evdev->mutex); | |
20da92de | 931 | evdev->exist = false; |
6addb1d6 DT |
932 | mutex_unlock(&evdev->mutex); |
933 | } | |
934 | ||
935 | static void evdev_cleanup(struct evdev *evdev) | |
936 | { | |
937 | struct input_handle *handle = &evdev->handle; | |
938 | ||
939 | evdev_mark_dead(evdev); | |
940 | evdev_hangup(evdev); | |
7f8d4cad DT |
941 | |
942 | cdev_del(&evdev->cdev); | |
6addb1d6 DT |
943 | |
944 | /* evdev is marked dead so no one else accesses evdev->open */ | |
945 | if (evdev->open) { | |
946 | input_flush_device(handle, NULL); | |
947 | input_close_device(handle); | |
948 | } | |
949 | } | |
950 | ||
951 | /* | |
952 | * Create new evdev device. Note that input core serializes calls | |
7f8d4cad | 953 | * to connect and disconnect. |
6addb1d6 | 954 | */ |
5b2a0826 DT |
955 | static int evdev_connect(struct input_handler *handler, struct input_dev *dev, |
956 | const struct input_device_id *id) | |
1da177e4 LT |
957 | { |
958 | struct evdev *evdev; | |
959 | int minor; | |
7f8d4cad | 960 | int dev_no; |
5b2a0826 | 961 | int error; |
1da177e4 | 962 | |
7f8d4cad DT |
963 | minor = input_get_new_minor(EVDEV_MINOR_BASE, EVDEV_MINORS, true); |
964 | if (minor < 0) { | |
965 | error = minor; | |
966 | pr_err("failed to reserve new minor: %d\n", error); | |
967 | return error; | |
1da177e4 LT |
968 | } |
969 | ||
5b2a0826 | 970 | evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL); |
7f8d4cad DT |
971 | if (!evdev) { |
972 | error = -ENOMEM; | |
973 | goto err_free_minor; | |
974 | } | |
1da177e4 | 975 | |
d0ffb9be | 976 | INIT_LIST_HEAD(&evdev->client_list); |
6addb1d6 DT |
977 | spin_lock_init(&evdev->client_lock); |
978 | mutex_init(&evdev->mutex); | |
1da177e4 | 979 | init_waitqueue_head(&evdev->wait); |
20da92de | 980 | evdev->exist = true; |
7f8d4cad DT |
981 | |
982 | dev_no = minor; | |
983 | /* Normalize device number if it falls into legacy range */ | |
984 | if (dev_no < EVDEV_MINOR_BASE + EVDEV_MINORS) | |
985 | dev_no -= EVDEV_MINOR_BASE; | |
986 | dev_set_name(&evdev->dev, "event%d", dev_no); | |
6addb1d6 | 987 | |
a7097ff8 | 988 | evdev->handle.dev = input_get_device(dev); |
3d5cb60e | 989 | evdev->handle.name = dev_name(&evdev->dev); |
1da177e4 LT |
990 | evdev->handle.handler = handler; |
991 | evdev->handle.private = evdev; | |
1da177e4 | 992 | |
7f8d4cad | 993 | evdev->dev.devt = MKDEV(INPUT_MAJOR, minor); |
9657d75c DT |
994 | evdev->dev.class = &input_class; |
995 | evdev->dev.parent = &dev->dev; | |
9657d75c DT |
996 | evdev->dev.release = evdev_free; |
997 | device_initialize(&evdev->dev); | |
5b2a0826 | 998 | |
6addb1d6 | 999 | error = input_register_handle(&evdev->handle); |
5b2a0826 | 1000 | if (error) |
9657d75c | 1001 | goto err_free_evdev; |
5b2a0826 | 1002 | |
7f8d4cad DT |
1003 | cdev_init(&evdev->cdev, &evdev_fops); |
1004 | error = cdev_add(&evdev->cdev, evdev->dev.devt, 1); | |
6addb1d6 DT |
1005 | if (error) |
1006 | goto err_unregister_handle; | |
1007 | ||
1008 | error = device_add(&evdev->dev); | |
5b2a0826 | 1009 | if (error) |
6addb1d6 | 1010 | goto err_cleanup_evdev; |
1da177e4 | 1011 | |
5b2a0826 | 1012 | return 0; |
1da177e4 | 1013 | |
6addb1d6 DT |
1014 | err_cleanup_evdev: |
1015 | evdev_cleanup(evdev); | |
1016 | err_unregister_handle: | |
1017 | input_unregister_handle(&evdev->handle); | |
5b2a0826 | 1018 | err_free_evdev: |
9657d75c | 1019 | put_device(&evdev->dev); |
7f8d4cad DT |
1020 | err_free_minor: |
1021 | input_free_minor(minor); | |
5b2a0826 | 1022 | return error; |
1da177e4 LT |
1023 | } |
1024 | ||
1025 | static void evdev_disconnect(struct input_handle *handle) | |
1026 | { | |
1027 | struct evdev *evdev = handle->private; | |
1da177e4 | 1028 | |
9657d75c | 1029 | device_del(&evdev->dev); |
6addb1d6 | 1030 | evdev_cleanup(evdev); |
7f8d4cad | 1031 | input_free_minor(MINOR(evdev->dev.devt)); |
6addb1d6 | 1032 | input_unregister_handle(handle); |
9657d75c | 1033 | put_device(&evdev->dev); |
1da177e4 LT |
1034 | } |
1035 | ||
66e66118 | 1036 | static const struct input_device_id evdev_ids[] = { |
1da177e4 LT |
1037 | { .driver_info = 1 }, /* Matches all devices */ |
1038 | { }, /* Terminating zero entry */ | |
1039 | }; | |
1040 | ||
1041 | MODULE_DEVICE_TABLE(input, evdev_ids); | |
1042 | ||
1043 | static struct input_handler evdev_handler = { | |
6addb1d6 | 1044 | .event = evdev_event, |
a274ac15 | 1045 | .events = evdev_events, |
6addb1d6 DT |
1046 | .connect = evdev_connect, |
1047 | .disconnect = evdev_disconnect, | |
7f8d4cad | 1048 | .legacy_minors = true, |
6addb1d6 DT |
1049 | .minor = EVDEV_MINOR_BASE, |
1050 | .name = "evdev", | |
1051 | .id_table = evdev_ids, | |
1da177e4 LT |
1052 | }; |
1053 | ||
1054 | static int __init evdev_init(void) | |
1055 | { | |
4263cf0f | 1056 | return input_register_handler(&evdev_handler); |
1da177e4 LT |
1057 | } |
1058 | ||
1059 | static void __exit evdev_exit(void) | |
1060 | { | |
1061 | input_unregister_handler(&evdev_handler); | |
1062 | } | |
1063 | ||
1064 | module_init(evdev_init); | |
1065 | module_exit(evdev_exit); | |
1066 | ||
1067 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
1068 | MODULE_DESCRIPTION("Input driver event char devices"); | |
1069 | MODULE_LICENSE("GPL"); |