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Commit | Line | Data |
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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 | ||
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> | |
1da177e4 | 21 | #include <linux/device.h> |
52658bb6 | 22 | #include <linux/compat.h> |
1da177e4 LT |
23 | |
24 | struct evdev { | |
25 | int exist; | |
26 | int open; | |
27 | int minor; | |
28 | char name[16]; | |
29 | struct input_handle handle; | |
30 | wait_queue_head_t wait; | |
d0ffb9be DT |
31 | struct evdev_client *grab; |
32 | struct list_head client_list; | |
9657d75c | 33 | struct device dev; |
1da177e4 LT |
34 | }; |
35 | ||
d0ffb9be | 36 | struct evdev_client { |
1da177e4 LT |
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; | |
d0ffb9be | 50 | struct evdev_client *client; |
1da177e4 LT |
51 | |
52 | if (evdev->grab) { | |
d0ffb9be | 53 | client = evdev->grab; |
1da177e4 | 54 | |
d0ffb9be DT |
55 | do_gettimeofday(&client->buffer[client->head].time); |
56 | client->buffer[client->head].type = type; | |
57 | client->buffer[client->head].code = code; | |
58 | client->buffer[client->head].value = value; | |
59 | client->head = (client->head + 1) & (EVDEV_BUFFER_SIZE - 1); | |
1da177e4 | 60 | |
d0ffb9be | 61 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
1da177e4 | 62 | } else |
d0ffb9be | 63 | list_for_each_entry(client, &evdev->client_list, node) { |
1da177e4 | 64 | |
d0ffb9be DT |
65 | do_gettimeofday(&client->buffer[client->head].time); |
66 | client->buffer[client->head].type = type; | |
67 | client->buffer[client->head].code = code; | |
68 | client->buffer[client->head].value = value; | |
69 | client->head = (client->head + 1) & (EVDEV_BUFFER_SIZE - 1); | |
1da177e4 | 70 | |
d0ffb9be | 71 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
1da177e4 LT |
72 | } |
73 | ||
74 | wake_up_interruptible(&evdev->wait); | |
75 | } | |
76 | ||
77 | static int evdev_fasync(int fd, struct file *file, int on) | |
78 | { | |
d0ffb9be | 79 | struct evdev_client *client = file->private_data; |
1da177e4 | 80 | int retval; |
1e0afb28 | 81 | |
d0ffb9be | 82 | retval = fasync_helper(fd, file, on, &client->fasync); |
1e0afb28 | 83 | |
1da177e4 LT |
84 | return retval < 0 ? retval : 0; |
85 | } | |
86 | ||
1e0afb28 | 87 | static int evdev_flush(struct file *file, fl_owner_t id) |
1da177e4 | 88 | { |
d0ffb9be DT |
89 | struct evdev_client *client = file->private_data; |
90 | struct evdev *evdev = client->evdev; | |
1e0afb28 | 91 | |
d0ffb9be | 92 | if (!evdev->exist) |
1e0afb28 DT |
93 | return -ENODEV; |
94 | ||
d0ffb9be | 95 | return input_flush_device(&evdev->handle, file); |
1da177e4 LT |
96 | } |
97 | ||
9657d75c | 98 | static void evdev_free(struct device *dev) |
1da177e4 | 99 | { |
9657d75c DT |
100 | struct evdev *evdev = container_of(dev, struct evdev, dev); |
101 | ||
1da177e4 LT |
102 | evdev_table[evdev->minor] = NULL; |
103 | kfree(evdev); | |
104 | } | |
105 | ||
d0ffb9be | 106 | static int evdev_release(struct inode *inode, struct file *file) |
1da177e4 | 107 | { |
d0ffb9be DT |
108 | struct evdev_client *client = file->private_data; |
109 | struct evdev *evdev = client->evdev; | |
1da177e4 | 110 | |
d0ffb9be DT |
111 | if (evdev->grab == client) { |
112 | input_release_device(&evdev->handle); | |
113 | evdev->grab = NULL; | |
1da177e4 LT |
114 | } |
115 | ||
116 | evdev_fasync(-1, file, 0); | |
d0ffb9be DT |
117 | list_del(&client->node); |
118 | kfree(client); | |
1da177e4 | 119 | |
9657d75c DT |
120 | if (!--evdev->open && evdev->exist) |
121 | input_close_device(&evdev->handle); | |
122 | ||
123 | put_device(&evdev->dev); | |
1da177e4 | 124 | |
1da177e4 LT |
125 | return 0; |
126 | } | |
127 | ||
d0ffb9be | 128 | static int evdev_open(struct inode *inode, struct file *file) |
1da177e4 | 129 | { |
d0ffb9be DT |
130 | struct evdev_client *client; |
131 | struct evdev *evdev; | |
1da177e4 | 132 | int i = iminor(inode) - EVDEV_MINOR_BASE; |
d542ed82 | 133 | int error; |
1da177e4 | 134 | |
d0ffb9be | 135 | if (i >= EVDEV_MINORS) |
1da177e4 LT |
136 | return -ENODEV; |
137 | ||
d0ffb9be DT |
138 | evdev = evdev_table[i]; |
139 | ||
140 | if (!evdev || !evdev->exist) | |
1da177e4 LT |
141 | return -ENODEV; |
142 | ||
9657d75c DT |
143 | get_device(&evdev->dev); |
144 | ||
d0ffb9be | 145 | client = kzalloc(sizeof(struct evdev_client), GFP_KERNEL); |
9657d75c DT |
146 | if (!client) { |
147 | error = -ENOMEM; | |
148 | goto err_put_evdev; | |
149 | } | |
1da177e4 | 150 | |
d0ffb9be DT |
151 | client->evdev = evdev; |
152 | list_add_tail(&client->node, &evdev->client_list); | |
1da177e4 | 153 | |
d542ed82 DT |
154 | if (!evdev->open++ && evdev->exist) { |
155 | error = input_open_device(&evdev->handle); | |
9657d75c DT |
156 | if (error) |
157 | goto err_free_client; | |
d542ed82 | 158 | } |
1da177e4 | 159 | |
d0ffb9be | 160 | file->private_data = client; |
1da177e4 | 161 | return 0; |
9657d75c DT |
162 | |
163 | err_free_client: | |
164 | list_del(&client->node); | |
165 | kfree(client); | |
166 | err_put_evdev: | |
167 | put_device(&evdev->dev); | |
168 | return error; | |
1da177e4 LT |
169 | } |
170 | ||
52658bb6 | 171 | #ifdef CONFIG_COMPAT |
3a51f7c4 | 172 | |
52658bb6 JK |
173 | struct input_event_compat { |
174 | struct compat_timeval time; | |
175 | __u16 type; | |
176 | __u16 code; | |
177 | __s32 value; | |
178 | }; | |
179 | ||
bf2fcc6f AK |
180 | /* Note to the author of this code: did it ever occur to |
181 | you why the ifdefs are needed? Think about it again. -AK */ | |
52658bb6 | 182 | #ifdef CONFIG_X86_64 |
bf2fcc6f | 183 | # define COMPAT_TEST is_compat_task() |
52658bb6 | 184 | #elif defined(CONFIG_IA64) |
6450578f | 185 | # define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current)) |
347a8dc3 | 186 | #elif defined(CONFIG_S390) |
52658bb6 | 187 | # define COMPAT_TEST test_thread_flag(TIF_31BIT) |
59df6bbf RB |
188 | #elif defined(CONFIG_MIPS) |
189 | # define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR) | |
52658bb6 JK |
190 | #else |
191 | # define COMPAT_TEST test_thread_flag(TIF_32BIT) | |
192 | #endif | |
193 | ||
3a51f7c4 | 194 | static inline size_t evdev_event_size(void) |
52658bb6 | 195 | { |
3a51f7c4 DT |
196 | return COMPAT_TEST ? |
197 | sizeof(struct input_event_compat) : sizeof(struct input_event); | |
198 | } | |
52658bb6 | 199 | |
3a51f7c4 DT |
200 | static int evdev_event_from_user(const char __user *buffer, struct input_event *event) |
201 | { | |
202 | if (COMPAT_TEST) { | |
203 | struct input_event_compat compat_event; | |
204 | ||
205 | if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat))) | |
206 | return -EFAULT; | |
207 | ||
208 | event->time.tv_sec = compat_event.time.tv_sec; | |
209 | event->time.tv_usec = compat_event.time.tv_usec; | |
210 | event->type = compat_event.type; | |
211 | event->code = compat_event.code; | |
212 | event->value = compat_event.value; | |
213 | ||
214 | } else { | |
215 | if (copy_from_user(event, buffer, sizeof(struct input_event))) | |
52658bb6 | 216 | return -EFAULT; |
52658bb6 JK |
217 | } |
218 | ||
3a51f7c4 | 219 | return 0; |
52658bb6 | 220 | } |
52658bb6 | 221 | |
3a51f7c4 | 222 | static int evdev_event_to_user(char __user *buffer, const struct input_event *event) |
1da177e4 | 223 | { |
3a51f7c4 DT |
224 | if (COMPAT_TEST) { |
225 | struct input_event_compat compat_event; | |
1da177e4 | 226 | |
3a51f7c4 DT |
227 | compat_event.time.tv_sec = event->time.tv_sec; |
228 | compat_event.time.tv_usec = event->time.tv_usec; | |
229 | compat_event.type = event->type; | |
230 | compat_event.code = event->code; | |
231 | compat_event.value = event->value; | |
52658bb6 | 232 | |
3a51f7c4 DT |
233 | if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat))) |
234 | return -EFAULT; | |
1da177e4 | 235 | |
3a51f7c4 DT |
236 | } else { |
237 | if (copy_to_user(buffer, event, sizeof(struct input_event))) | |
1da177e4 | 238 | return -EFAULT; |
1da177e4 LT |
239 | } |
240 | ||
3a51f7c4 | 241 | return 0; |
1da177e4 LT |
242 | } |
243 | ||
3a51f7c4 DT |
244 | #else |
245 | ||
246 | static inline size_t evdev_event_size(void) | |
52658bb6 | 247 | { |
3a51f7c4 DT |
248 | return sizeof(struct input_event); |
249 | } | |
52658bb6 | 250 | |
3a51f7c4 DT |
251 | static int evdev_event_from_user(const char __user *buffer, struct input_event *event) |
252 | { | |
253 | if (copy_from_user(event, buffer, sizeof(struct input_event))) | |
254 | return -EFAULT; | |
52658bb6 | 255 | |
3a51f7c4 DT |
256 | return 0; |
257 | } | |
52658bb6 | 258 | |
3a51f7c4 DT |
259 | static int evdev_event_to_user(char __user *buffer, const struct input_event *event) |
260 | { | |
261 | if (copy_to_user(buffer, event, sizeof(struct input_event))) | |
262 | return -EFAULT; | |
52658bb6 | 263 | |
3a51f7c4 DT |
264 | return 0; |
265 | } | |
266 | ||
267 | #endif /* CONFIG_COMPAT */ | |
268 | ||
d0ffb9be | 269 | static ssize_t evdev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
3a51f7c4 | 270 | { |
d0ffb9be DT |
271 | struct evdev_client *client = file->private_data; |
272 | struct evdev *evdev = client->evdev; | |
3a51f7c4 DT |
273 | struct input_event event; |
274 | int retval = 0; | |
52658bb6 | 275 | |
d0ffb9be | 276 | if (!evdev->exist) |
52658bb6 JK |
277 | return -ENODEV; |
278 | ||
3a51f7c4 DT |
279 | while (retval < count) { |
280 | ||
281 | if (evdev_event_from_user(buffer + retval, &event)) | |
282 | return -EFAULT; | |
d0ffb9be | 283 | input_inject_event(&evdev->handle, event.type, event.code, event.value); |
3a51f7c4 | 284 | retval += evdev_event_size(); |
52658bb6 JK |
285 | } |
286 | ||
287 | return retval; | |
288 | } | |
52658bb6 | 289 | |
d0ffb9be | 290 | static ssize_t evdev_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) |
1da177e4 | 291 | { |
d0ffb9be DT |
292 | struct evdev_client *client = file->private_data; |
293 | struct evdev *evdev = client->evdev; | |
1da177e4 LT |
294 | int retval; |
295 | ||
3a51f7c4 | 296 | if (count < evdev_event_size()) |
1da177e4 LT |
297 | return -EINVAL; |
298 | ||
d0ffb9be | 299 | if (client->head == client->tail && evdev->exist && (file->f_flags & O_NONBLOCK)) |
1da177e4 LT |
300 | return -EAGAIN; |
301 | ||
d0ffb9be DT |
302 | retval = wait_event_interruptible(evdev->wait, |
303 | client->head != client->tail || !evdev->exist); | |
1da177e4 LT |
304 | if (retval) |
305 | return retval; | |
306 | ||
d0ffb9be | 307 | if (!evdev->exist) |
1da177e4 LT |
308 | return -ENODEV; |
309 | ||
d0ffb9be | 310 | while (client->head != client->tail && retval + evdev_event_size() <= count) { |
3a51f7c4 | 311 | |
d0ffb9be | 312 | struct input_event *event = (struct input_event *) client->buffer + client->tail; |
3a51f7c4 DT |
313 | |
314 | if (evdev_event_to_user(buffer + retval, event)) | |
315 | return -EFAULT; | |
316 | ||
d0ffb9be | 317 | client->tail = (client->tail + 1) & (EVDEV_BUFFER_SIZE - 1); |
3a51f7c4 | 318 | retval += evdev_event_size(); |
1da177e4 LT |
319 | } |
320 | ||
321 | return retval; | |
322 | } | |
323 | ||
324 | /* No kernel lock - fine */ | |
325 | static unsigned int evdev_poll(struct file *file, poll_table *wait) | |
326 | { | |
d0ffb9be DT |
327 | struct evdev_client *client = file->private_data; |
328 | struct evdev *evdev = client->evdev; | |
1e0afb28 | 329 | |
d0ffb9be DT |
330 | poll_wait(file, &evdev->wait, wait); |
331 | return ((client->head == client->tail) ? 0 : (POLLIN | POLLRDNORM)) | | |
332 | (evdev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
333 | } |
334 | ||
3a51f7c4 DT |
335 | #ifdef CONFIG_COMPAT |
336 | ||
337 | #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8) | |
338 | #define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1) | |
339 | ||
340 | #ifdef __BIG_ENDIAN | |
341 | static int bits_to_user(unsigned long *bits, unsigned int maxbit, | |
342 | unsigned int maxlen, void __user *p, int compat) | |
343 | { | |
344 | int len, i; | |
345 | ||
346 | if (compat) { | |
347 | len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t); | |
bf61f8d3 | 348 | if (len > maxlen) |
3a51f7c4 DT |
349 | len = maxlen; |
350 | ||
351 | for (i = 0; i < len / sizeof(compat_long_t); i++) | |
352 | if (copy_to_user((compat_long_t __user *) p + i, | |
353 | (compat_long_t *) bits + | |
354 | i + 1 - ((i % 2) << 1), | |
355 | sizeof(compat_long_t))) | |
356 | return -EFAULT; | |
357 | } else { | |
358 | len = NBITS(maxbit) * sizeof(long); | |
359 | if (len > maxlen) | |
360 | len = maxlen; | |
361 | ||
362 | if (copy_to_user(p, bits, len)) | |
363 | return -EFAULT; | |
364 | } | |
365 | ||
366 | return len; | |
367 | } | |
368 | #else | |
369 | static int bits_to_user(unsigned long *bits, unsigned int maxbit, | |
370 | unsigned int maxlen, void __user *p, int compat) | |
371 | { | |
372 | int len = compat ? | |
373 | NBITS_COMPAT(maxbit) * sizeof(compat_long_t) : | |
374 | NBITS(maxbit) * sizeof(long); | |
375 | ||
376 | if (len > maxlen) | |
377 | len = maxlen; | |
378 | ||
379 | return copy_to_user(p, bits, len) ? -EFAULT : len; | |
380 | } | |
381 | #endif /* __BIG_ENDIAN */ | |
382 | ||
383 | #else | |
384 | ||
385 | static int bits_to_user(unsigned long *bits, unsigned int maxbit, | |
386 | unsigned int maxlen, void __user *p, int compat) | |
387 | { | |
388 | int len = NBITS(maxbit) * sizeof(long); | |
389 | ||
390 | if (len > maxlen) | |
391 | len = maxlen; | |
392 | ||
393 | return copy_to_user(p, bits, len) ? -EFAULT : len; | |
394 | } | |
395 | ||
396 | #endif /* CONFIG_COMPAT */ | |
397 | ||
398 | static int str_to_user(const char *str, unsigned int maxlen, void __user *p) | |
399 | { | |
400 | int len; | |
401 | ||
402 | if (!str) | |
403 | return -ENOENT; | |
404 | ||
405 | len = strlen(str) + 1; | |
406 | if (len > maxlen) | |
407 | len = maxlen; | |
408 | ||
409 | return copy_to_user(p, str, len) ? -EFAULT : len; | |
410 | } | |
411 | ||
412 | static long evdev_ioctl_handler(struct file *file, unsigned int cmd, | |
413 | void __user *p, int compat_mode) | |
1da177e4 | 414 | { |
d0ffb9be DT |
415 | struct evdev_client *client = file->private_data; |
416 | struct evdev *evdev = client->evdev; | |
1da177e4 LT |
417 | struct input_dev *dev = evdev->handle.dev; |
418 | struct input_absinfo abs; | |
509ca1a9 | 419 | struct ff_effect effect; |
3a51f7c4 | 420 | int __user *ip = (int __user *)p; |
1da177e4 | 421 | int i, t, u, v; |
509ca1a9 | 422 | int error; |
1da177e4 | 423 | |
3a51f7c4 DT |
424 | if (!evdev->exist) |
425 | return -ENODEV; | |
1da177e4 LT |
426 | |
427 | switch (cmd) { | |
428 | ||
429 | case EVIOCGVERSION: | |
430 | return put_user(EV_VERSION, ip); | |
431 | ||
432 | case EVIOCGID: | |
3a51f7c4 DT |
433 | if (copy_to_user(p, &dev->id, sizeof(struct input_id))) |
434 | return -EFAULT; | |
08791e5c DT |
435 | return 0; |
436 | ||
437 | case EVIOCGREP: | |
438 | if (!test_bit(EV_REP, dev->evbit)) | |
439 | return -ENOSYS; | |
440 | if (put_user(dev->rep[REP_DELAY], ip)) | |
441 | return -EFAULT; | |
442 | if (put_user(dev->rep[REP_PERIOD], ip + 1)) | |
443 | return -EFAULT; | |
444 | return 0; | |
445 | ||
446 | case EVIOCSREP: | |
447 | if (!test_bit(EV_REP, dev->evbit)) | |
448 | return -ENOSYS; | |
449 | if (get_user(u, ip)) | |
450 | return -EFAULT; | |
451 | if (get_user(v, ip + 1)) | |
452 | return -EFAULT; | |
453 | ||
0e739d28 DT |
454 | input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u); |
455 | input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v); | |
3a51f7c4 DT |
456 | |
457 | return 0; | |
1da177e4 LT |
458 | |
459 | case EVIOCGKEYCODE: | |
3a51f7c4 DT |
460 | if (get_user(t, ip)) |
461 | return -EFAULT; | |
c8e4c772 MR |
462 | |
463 | error = dev->getkeycode(dev, t, &v); | |
464 | if (error) | |
465 | return error; | |
466 | ||
467 | if (put_user(v, ip + 1)) | |
3a51f7c4 | 468 | return -EFAULT; |
c8e4c772 | 469 | |
1da177e4 LT |
470 | return 0; |
471 | ||
472 | case EVIOCSKEYCODE: | |
c8e4c772 | 473 | if (get_user(t, ip) || get_user(v, ip + 1)) |
3a51f7c4 | 474 | return -EFAULT; |
3a51f7c4 | 475 | |
c8e4c772 | 476 | return dev->setkeycode(dev, t, v); |
1da177e4 LT |
477 | |
478 | case EVIOCSFF: | |
509ca1a9 AH |
479 | if (copy_from_user(&effect, p, sizeof(effect))) |
480 | return -EFAULT; | |
1da177e4 | 481 | |
509ca1a9 | 482 | error = input_ff_upload(dev, &effect, file); |
3a51f7c4 | 483 | |
509ca1a9 AH |
484 | if (put_user(effect.id, &(((struct ff_effect __user *)p)->id))) |
485 | return -EFAULT; | |
486 | ||
487 | return error; | |
488 | ||
489 | case EVIOCRMFF: | |
490 | return input_ff_erase(dev, (int)(unsigned long) p, file); | |
1da177e4 LT |
491 | |
492 | case EVIOCGEFFECTS: | |
509ca1a9 AH |
493 | i = test_bit(EV_FF, dev->evbit) ? dev->ff->max_effects : 0; |
494 | if (put_user(i, ip)) | |
1da177e4 LT |
495 | return -EFAULT; |
496 | return 0; | |
497 | ||
498 | case EVIOCGRAB: | |
3a51f7c4 | 499 | if (p) { |
1da177e4 LT |
500 | if (evdev->grab) |
501 | return -EBUSY; | |
502 | if (input_grab_device(&evdev->handle)) | |
503 | return -EBUSY; | |
d0ffb9be | 504 | evdev->grab = client; |
1da177e4 LT |
505 | return 0; |
506 | } else { | |
d0ffb9be | 507 | if (evdev->grab != client) |
1da177e4 LT |
508 | return -EINVAL; |
509 | input_release_device(&evdev->handle); | |
510 | evdev->grab = NULL; | |
511 | return 0; | |
512 | } | |
513 | ||
514 | default: | |
515 | ||
41e979f8 | 516 | if (_IOC_TYPE(cmd) != 'E') |
1da177e4 LT |
517 | return -EINVAL; |
518 | ||
41e979f8 VP |
519 | if (_IOC_DIR(cmd) == _IOC_READ) { |
520 | ||
521 | if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) { | |
522 | ||
ce305b6a | 523 | unsigned long *bits; |
41e979f8 VP |
524 | int len; |
525 | ||
526 | switch (_IOC_NR(cmd) & EV_MAX) { | |
527 | case 0: bits = dev->evbit; len = EV_MAX; break; | |
528 | case EV_KEY: bits = dev->keybit; len = KEY_MAX; break; | |
529 | case EV_REL: bits = dev->relbit; len = REL_MAX; break; | |
530 | case EV_ABS: bits = dev->absbit; len = ABS_MAX; break; | |
531 | case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break; | |
532 | case EV_LED: bits = dev->ledbit; len = LED_MAX; break; | |
533 | case EV_SND: bits = dev->sndbit; len = SND_MAX; break; | |
534 | case EV_FF: bits = dev->ffbit; len = FF_MAX; break; | |
31581066 | 535 | case EV_SW: bits = dev->swbit; len = SW_MAX; break; |
41e979f8 VP |
536 | default: return -EINVAL; |
537 | } | |
3a51f7c4 | 538 | return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode); |
1da177e4 | 539 | } |
1da177e4 | 540 | |
3a51f7c4 DT |
541 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0))) |
542 | return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd), | |
543 | p, compat_mode); | |
1da177e4 | 544 | |
3a51f7c4 DT |
545 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0))) |
546 | return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd), | |
547 | p, compat_mode); | |
1da177e4 | 548 | |
3a51f7c4 DT |
549 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0))) |
550 | return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd), | |
551 | p, compat_mode); | |
1da177e4 | 552 | |
3a51f7c4 DT |
553 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0))) |
554 | return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd), | |
555 | p, compat_mode); | |
31581066 | 556 | |
3a51f7c4 DT |
557 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0))) |
558 | return str_to_user(dev->name, _IOC_SIZE(cmd), p); | |
1da177e4 | 559 | |
3a51f7c4 DT |
560 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0))) |
561 | return str_to_user(dev->phys, _IOC_SIZE(cmd), p); | |
1da177e4 | 562 | |
3a51f7c4 DT |
563 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0))) |
564 | return str_to_user(dev->uniq, _IOC_SIZE(cmd), p); | |
1da177e4 | 565 | |
41e979f8 | 566 | if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) { |
1da177e4 | 567 | |
ce305b6a | 568 | t = _IOC_NR(cmd) & ABS_MAX; |
1da177e4 | 569 | |
41e979f8 VP |
570 | abs.value = dev->abs[t]; |
571 | abs.minimum = dev->absmin[t]; | |
572 | abs.maximum = dev->absmax[t]; | |
573 | abs.fuzz = dev->absfuzz[t]; | |
574 | abs.flat = dev->absflat[t]; | |
1da177e4 | 575 | |
41e979f8 VP |
576 | if (copy_to_user(p, &abs, sizeof(struct input_absinfo))) |
577 | return -EFAULT; | |
578 | ||
579 | return 0; | |
580 | } | |
1da177e4 | 581 | |
1da177e4 LT |
582 | } |
583 | ||
41e979f8 | 584 | if (_IOC_DIR(cmd) == _IOC_WRITE) { |
1da177e4 | 585 | |
41e979f8 | 586 | if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) { |
1da177e4 | 587 | |
ce305b6a | 588 | t = _IOC_NR(cmd) & ABS_MAX; |
41e979f8 VP |
589 | |
590 | if (copy_from_user(&abs, p, sizeof(struct input_absinfo))) | |
591 | return -EFAULT; | |
1da177e4 | 592 | |
41e979f8 VP |
593 | dev->abs[t] = abs.value; |
594 | dev->absmin[t] = abs.minimum; | |
595 | dev->absmax[t] = abs.maximum; | |
596 | dev->absfuzz[t] = abs.fuzz; | |
597 | dev->absflat[t] = abs.flat; | |
1da177e4 | 598 | |
41e979f8 VP |
599 | return 0; |
600 | } | |
1da177e4 | 601 | } |
1da177e4 LT |
602 | } |
603 | return -EINVAL; | |
604 | } | |
1da177e4 | 605 | |
3a51f7c4 DT |
606 | static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
607 | { | |
608 | return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0); | |
609 | } | |
41e979f8 | 610 | |
3a51f7c4 | 611 | #ifdef CONFIG_COMPAT |
52658bb6 JK |
612 | static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) |
613 | { | |
3a51f7c4 | 614 | return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1); |
1da177e4 | 615 | } |
52658bb6 | 616 | #endif |
1da177e4 | 617 | |
66e66118 | 618 | static const struct file_operations evdev_fops = { |
1da177e4 LT |
619 | .owner = THIS_MODULE, |
620 | .read = evdev_read, | |
621 | .write = evdev_write, | |
622 | .poll = evdev_poll, | |
623 | .open = evdev_open, | |
624 | .release = evdev_release, | |
52658bb6 JK |
625 | .unlocked_ioctl = evdev_ioctl, |
626 | #ifdef CONFIG_COMPAT | |
627 | .compat_ioctl = evdev_ioctl_compat, | |
628 | #endif | |
1da177e4 LT |
629 | .fasync = evdev_fasync, |
630 | .flush = evdev_flush | |
631 | }; | |
632 | ||
5b2a0826 DT |
633 | static int evdev_connect(struct input_handler *handler, struct input_dev *dev, |
634 | const struct input_device_id *id) | |
1da177e4 LT |
635 | { |
636 | struct evdev *evdev; | |
637 | int minor; | |
5b2a0826 | 638 | int error; |
1da177e4 LT |
639 | |
640 | for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++); | |
641 | if (minor == EVDEV_MINORS) { | |
642 | printk(KERN_ERR "evdev: no more free evdev devices\n"); | |
5b2a0826 | 643 | return -ENFILE; |
1da177e4 LT |
644 | } |
645 | ||
5b2a0826 DT |
646 | evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL); |
647 | if (!evdev) | |
648 | return -ENOMEM; | |
1da177e4 | 649 | |
d0ffb9be | 650 | INIT_LIST_HEAD(&evdev->client_list); |
1da177e4 LT |
651 | init_waitqueue_head(&evdev->wait); |
652 | ||
653 | evdev->exist = 1; | |
654 | evdev->minor = minor; | |
655 | evdev->handle.dev = dev; | |
656 | evdev->handle.name = evdev->name; | |
657 | evdev->handle.handler = handler; | |
658 | evdev->handle.private = evdev; | |
9657d75c | 659 | snprintf(evdev->name, sizeof(evdev->name), "event%d", minor); |
1da177e4 | 660 | |
9657d75c DT |
661 | snprintf(evdev->dev.bus_id, sizeof(evdev->dev.bus_id), |
662 | "event%d", minor); | |
663 | evdev->dev.class = &input_class; | |
664 | evdev->dev.parent = &dev->dev; | |
665 | evdev->dev.devt = MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor); | |
666 | evdev->dev.release = evdev_free; | |
667 | device_initialize(&evdev->dev); | |
5b2a0826 | 668 | |
9657d75c | 669 | evdev_table[minor] = evdev; |
c9bcd582 | 670 | |
9657d75c | 671 | error = device_add(&evdev->dev); |
5b2a0826 | 672 | if (error) |
9657d75c | 673 | goto err_free_evdev; |
5b2a0826 DT |
674 | |
675 | error = input_register_handle(&evdev->handle); | |
676 | if (error) | |
9657d75c | 677 | goto err_delete_evdev; |
1da177e4 | 678 | |
5b2a0826 | 679 | return 0; |
1da177e4 | 680 | |
9657d75c DT |
681 | err_delete_evdev: |
682 | device_del(&evdev->dev); | |
5b2a0826 | 683 | err_free_evdev: |
9657d75c | 684 | put_device(&evdev->dev); |
5b2a0826 | 685 | return error; |
1da177e4 LT |
686 | } |
687 | ||
688 | static void evdev_disconnect(struct input_handle *handle) | |
689 | { | |
690 | struct evdev *evdev = handle->private; | |
d0ffb9be | 691 | struct evdev_client *client; |
1da177e4 | 692 | |
5b2a0826 | 693 | input_unregister_handle(handle); |
9657d75c | 694 | device_del(&evdev->dev); |
1da177e4 | 695 | |
1da177e4 LT |
696 | evdev->exist = 0; |
697 | ||
698 | if (evdev->open) { | |
509ca1a9 | 699 | input_flush_device(handle, NULL); |
1da177e4 | 700 | input_close_device(handle); |
d0ffb9be DT |
701 | list_for_each_entry(client, &evdev->client_list, node) |
702 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
1dfa2812 | 703 | wake_up_interruptible(&evdev->wait); |
9657d75c DT |
704 | } |
705 | ||
706 | put_device(&evdev->dev); | |
1da177e4 LT |
707 | } |
708 | ||
66e66118 | 709 | static const struct input_device_id evdev_ids[] = { |
1da177e4 LT |
710 | { .driver_info = 1 }, /* Matches all devices */ |
711 | { }, /* Terminating zero entry */ | |
712 | }; | |
713 | ||
714 | MODULE_DEVICE_TABLE(input, evdev_ids); | |
715 | ||
716 | static struct input_handler evdev_handler = { | |
717 | .event = evdev_event, | |
718 | .connect = evdev_connect, | |
719 | .disconnect = evdev_disconnect, | |
720 | .fops = &evdev_fops, | |
721 | .minor = EVDEV_MINOR_BASE, | |
722 | .name = "evdev", | |
723 | .id_table = evdev_ids, | |
724 | }; | |
725 | ||
726 | static int __init evdev_init(void) | |
727 | { | |
4263cf0f | 728 | return input_register_handler(&evdev_handler); |
1da177e4 LT |
729 | } |
730 | ||
731 | static void __exit evdev_exit(void) | |
732 | { | |
733 | input_unregister_handler(&evdev_handler); | |
734 | } | |
735 | ||
736 | module_init(evdev_init); | |
737 | module_exit(evdev_exit); | |
738 | ||
739 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
740 | MODULE_DESCRIPTION("Input driver event char devices"); | |
741 | MODULE_LICENSE("GPL"); |