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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> | |
21 | #include <linux/smp_lock.h> | |
22 | #include <linux/device.h> | |
52658bb6 | 23 | #include <linux/compat.h> |
1da177e4 LT |
24 | |
25 | struct evdev { | |
26 | int exist; | |
27 | int open; | |
28 | int minor; | |
29 | char name[16]; | |
30 | struct input_handle handle; | |
31 | wait_queue_head_t wait; | |
32 | struct evdev_list *grab; | |
33 | struct list_head list; | |
34 | }; | |
35 | ||
36 | struct evdev_list { | |
37 | struct input_event buffer[EVDEV_BUFFER_SIZE]; | |
38 | int head; | |
39 | int tail; | |
40 | struct fasync_struct *fasync; | |
41 | struct evdev *evdev; | |
42 | struct list_head node; | |
43 | }; | |
44 | ||
45 | static struct evdev *evdev_table[EVDEV_MINORS]; | |
46 | ||
47 | static void evdev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) | |
48 | { | |
49 | struct evdev *evdev = handle->private; | |
50 | struct evdev_list *list; | |
51 | ||
52 | if (evdev->grab) { | |
53 | list = evdev->grab; | |
54 | ||
55 | do_gettimeofday(&list->buffer[list->head].time); | |
56 | list->buffer[list->head].type = type; | |
57 | list->buffer[list->head].code = code; | |
58 | list->buffer[list->head].value = value; | |
59 | list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1); | |
60 | ||
61 | kill_fasync(&list->fasync, SIGIO, POLL_IN); | |
62 | } else | |
63 | list_for_each_entry(list, &evdev->list, node) { | |
64 | ||
65 | do_gettimeofday(&list->buffer[list->head].time); | |
66 | list->buffer[list->head].type = type; | |
67 | list->buffer[list->head].code = code; | |
68 | list->buffer[list->head].value = value; | |
69 | list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1); | |
70 | ||
71 | kill_fasync(&list->fasync, SIGIO, POLL_IN); | |
72 | } | |
73 | ||
74 | wake_up_interruptible(&evdev->wait); | |
75 | } | |
76 | ||
77 | static int evdev_fasync(int fd, struct file *file, int on) | |
78 | { | |
79 | int retval; | |
80 | struct evdev_list *list = file->private_data; | |
81 | retval = fasync_helper(fd, file, on, &list->fasync); | |
82 | return retval < 0 ? retval : 0; | |
83 | } | |
84 | ||
85 | static int evdev_flush(struct file * file) | |
86 | { | |
87 | struct evdev_list *list = file->private_data; | |
88 | if (!list->evdev->exist) return -ENODEV; | |
89 | return input_flush_device(&list->evdev->handle, file); | |
90 | } | |
91 | ||
92 | static void evdev_free(struct evdev *evdev) | |
93 | { | |
94 | evdev_table[evdev->minor] = NULL; | |
95 | kfree(evdev); | |
96 | } | |
97 | ||
98 | static int evdev_release(struct inode * inode, struct file * file) | |
99 | { | |
100 | struct evdev_list *list = file->private_data; | |
101 | ||
102 | if (list->evdev->grab == list) { | |
103 | input_release_device(&list->evdev->handle); | |
104 | list->evdev->grab = NULL; | |
105 | } | |
106 | ||
107 | evdev_fasync(-1, file, 0); | |
108 | list_del(&list->node); | |
109 | ||
110 | if (!--list->evdev->open) { | |
111 | if (list->evdev->exist) | |
112 | input_close_device(&list->evdev->handle); | |
113 | else | |
114 | evdev_free(list->evdev); | |
115 | } | |
116 | ||
117 | kfree(list); | |
118 | return 0; | |
119 | } | |
120 | ||
121 | static int evdev_open(struct inode * inode, struct file * file) | |
122 | { | |
123 | struct evdev_list *list; | |
124 | int i = iminor(inode) - EVDEV_MINOR_BASE; | |
125 | int accept_err; | |
126 | ||
127 | if (i >= EVDEV_MINORS || !evdev_table[i] || !evdev_table[i]->exist) | |
128 | return -ENODEV; | |
129 | ||
130 | if ((accept_err = input_accept_process(&(evdev_table[i]->handle), file))) | |
131 | return accept_err; | |
132 | ||
133 | if (!(list = kmalloc(sizeof(struct evdev_list), GFP_KERNEL))) | |
134 | return -ENOMEM; | |
135 | memset(list, 0, sizeof(struct evdev_list)); | |
136 | ||
137 | list->evdev = evdev_table[i]; | |
138 | list_add_tail(&list->node, &evdev_table[i]->list); | |
139 | file->private_data = list; | |
140 | ||
141 | if (!list->evdev->open++) | |
142 | if (list->evdev->exist) | |
143 | input_open_device(&list->evdev->handle); | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
52658bb6 JK |
148 | #ifdef CONFIG_COMPAT |
149 | struct input_event_compat { | |
150 | struct compat_timeval time; | |
151 | __u16 type; | |
152 | __u16 code; | |
153 | __s32 value; | |
154 | }; | |
155 | ||
156 | #ifdef CONFIG_X86_64 | |
157 | # define COMPAT_TEST test_thread_flag(TIF_IA32) | |
158 | #elif defined(CONFIG_IA64) | |
159 | # define COMPAT_TEST IS_IA32_PROCESS(ia64_task_regs(current)) | |
160 | #elif defined(CONFIG_ARCH_S390) | |
161 | # define COMPAT_TEST test_thread_flag(TIF_31BIT) | |
59df6bbf RB |
162 | #elif defined(CONFIG_MIPS) |
163 | # define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR) | |
52658bb6 JK |
164 | #else |
165 | # define COMPAT_TEST test_thread_flag(TIF_32BIT) | |
166 | #endif | |
167 | ||
168 | static ssize_t evdev_write_compat(struct file * file, const char __user * buffer, size_t count, loff_t *ppos) | |
169 | { | |
170 | struct evdev_list *list = file->private_data; | |
171 | struct input_event_compat event; | |
172 | int retval = 0; | |
173 | ||
174 | while (retval < count) { | |
175 | if (copy_from_user(&event, buffer + retval, sizeof(struct input_event_compat))) | |
176 | return -EFAULT; | |
177 | input_event(list->evdev->handle.dev, event.type, event.code, event.value); | |
178 | retval += sizeof(struct input_event_compat); | |
179 | } | |
180 | ||
181 | return retval; | |
182 | } | |
183 | #endif | |
184 | ||
1da177e4 LT |
185 | static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos) |
186 | { | |
187 | struct evdev_list *list = file->private_data; | |
188 | struct input_event event; | |
189 | int retval = 0; | |
190 | ||
191 | if (!list->evdev->exist) return -ENODEV; | |
192 | ||
52658bb6 JK |
193 | #ifdef CONFIG_COMPAT |
194 | if (COMPAT_TEST) | |
195 | return evdev_write_compat(file, buffer, count, ppos); | |
196 | #endif | |
197 | ||
1da177e4 LT |
198 | while (retval < count) { |
199 | ||
200 | if (copy_from_user(&event, buffer + retval, sizeof(struct input_event))) | |
201 | return -EFAULT; | |
202 | input_event(list->evdev->handle.dev, event.type, event.code, event.value); | |
203 | retval += sizeof(struct input_event); | |
204 | } | |
205 | ||
206 | return retval; | |
207 | } | |
208 | ||
52658bb6 JK |
209 | #ifdef CONFIG_COMPAT |
210 | static ssize_t evdev_read_compat(struct file * file, char __user * buffer, size_t count, loff_t *ppos) | |
211 | { | |
212 | struct evdev_list *list = file->private_data; | |
213 | int retval; | |
214 | ||
215 | if (count < sizeof(struct input_event_compat)) | |
216 | return -EINVAL; | |
217 | ||
218 | if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK)) | |
219 | return -EAGAIN; | |
220 | ||
221 | retval = wait_event_interruptible(list->evdev->wait, | |
222 | list->head != list->tail || (!list->evdev->exist)); | |
223 | ||
224 | if (retval) | |
225 | return retval; | |
226 | ||
227 | if (!list->evdev->exist) | |
228 | return -ENODEV; | |
229 | ||
230 | while (list->head != list->tail && retval + sizeof(struct input_event_compat) <= count) { | |
231 | struct input_event *event = (struct input_event *) list->buffer + list->tail; | |
232 | struct input_event_compat event_compat; | |
233 | event_compat.time.tv_sec = event->time.tv_sec; | |
234 | event_compat.time.tv_usec = event->time.tv_usec; | |
235 | event_compat.type = event->type; | |
236 | event_compat.code = event->code; | |
237 | event_compat.value = event->value; | |
238 | ||
239 | if (copy_to_user(buffer + retval, &event_compat, | |
41e979f8 | 240 | sizeof(struct input_event_compat))) return -EFAULT; |
52658bb6 JK |
241 | list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1); |
242 | retval += sizeof(struct input_event_compat); | |
243 | } | |
244 | ||
245 | return retval; | |
246 | } | |
247 | #endif | |
248 | ||
1da177e4 LT |
249 | static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos) |
250 | { | |
251 | struct evdev_list *list = file->private_data; | |
252 | int retval; | |
253 | ||
52658bb6 JK |
254 | #ifdef CONFIG_COMPAT |
255 | if (COMPAT_TEST) | |
256 | return evdev_read_compat(file, buffer, count, ppos); | |
257 | #endif | |
258 | ||
1da177e4 LT |
259 | if (count < sizeof(struct input_event)) |
260 | return -EINVAL; | |
261 | ||
262 | if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK)) | |
263 | return -EAGAIN; | |
264 | ||
265 | retval = wait_event_interruptible(list->evdev->wait, | |
266 | list->head != list->tail || (!list->evdev->exist)); | |
267 | ||
268 | if (retval) | |
269 | return retval; | |
270 | ||
271 | if (!list->evdev->exist) | |
272 | return -ENODEV; | |
273 | ||
274 | while (list->head != list->tail && retval + sizeof(struct input_event) <= count) { | |
275 | if (copy_to_user(buffer + retval, list->buffer + list->tail, | |
41e979f8 | 276 | sizeof(struct input_event))) return -EFAULT; |
1da177e4 LT |
277 | list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1); |
278 | retval += sizeof(struct input_event); | |
279 | } | |
280 | ||
281 | return retval; | |
282 | } | |
283 | ||
284 | /* No kernel lock - fine */ | |
285 | static unsigned int evdev_poll(struct file *file, poll_table *wait) | |
286 | { | |
287 | struct evdev_list *list = file->private_data; | |
288 | poll_wait(file, &list->evdev->wait, wait); | |
289 | return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) | | |
290 | (list->evdev->exist ? 0 : (POLLHUP | POLLERR)); | |
291 | } | |
292 | ||
52658bb6 | 293 | static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
294 | { |
295 | struct evdev_list *list = file->private_data; | |
296 | struct evdev *evdev = list->evdev; | |
297 | struct input_dev *dev = evdev->handle.dev; | |
298 | struct input_absinfo abs; | |
299 | void __user *p = (void __user *)arg; | |
300 | int __user *ip = (int __user *)arg; | |
301 | int i, t, u, v; | |
302 | ||
303 | if (!evdev->exist) return -ENODEV; | |
304 | ||
305 | switch (cmd) { | |
306 | ||
307 | case EVIOCGVERSION: | |
308 | return put_user(EV_VERSION, ip); | |
309 | ||
310 | case EVIOCGID: | |
311 | return copy_to_user(p, &dev->id, sizeof(struct input_id)) ? -EFAULT : 0; | |
312 | ||
313 | case EVIOCGKEYCODE: | |
314 | if (get_user(t, ip)) return -EFAULT; | |
315 | if (t < 0 || t >= dev->keycodemax || !dev->keycodesize) return -EINVAL; | |
316 | if (put_user(INPUT_KEYCODE(dev, t), ip + 1)) return -EFAULT; | |
317 | return 0; | |
318 | ||
319 | case EVIOCSKEYCODE: | |
320 | if (get_user(t, ip)) return -EFAULT; | |
321 | if (t < 0 || t >= dev->keycodemax || !dev->keycodesize) return -EINVAL; | |
322 | if (get_user(v, ip + 1)) return -EFAULT; | |
323 | if (v < 0 || v > KEY_MAX) return -EINVAL; | |
4cee9956 | 324 | if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8))) return -EINVAL; |
1da177e4 LT |
325 | u = SET_INPUT_KEYCODE(dev, t, v); |
326 | clear_bit(u, dev->keybit); | |
327 | set_bit(v, dev->keybit); | |
328 | for (i = 0; i < dev->keycodemax; i++) | |
329 | if (INPUT_KEYCODE(dev,i) == u) | |
330 | set_bit(u, dev->keybit); | |
331 | return 0; | |
332 | ||
333 | case EVIOCSFF: | |
334 | if (dev->upload_effect) { | |
335 | struct ff_effect effect; | |
336 | int err; | |
337 | ||
338 | if (copy_from_user(&effect, p, sizeof(effect))) | |
339 | return -EFAULT; | |
340 | err = dev->upload_effect(dev, &effect); | |
341 | if (put_user(effect.id, &(((struct ff_effect __user *)arg)->id))) | |
342 | return -EFAULT; | |
343 | return err; | |
344 | } | |
345 | else return -ENOSYS; | |
346 | ||
347 | case EVIOCRMFF: | |
348 | if (dev->erase_effect) { | |
349 | return dev->erase_effect(dev, (int)arg); | |
350 | } | |
351 | else return -ENOSYS; | |
352 | ||
353 | case EVIOCGEFFECTS: | |
354 | if (put_user(dev->ff_effects_max, ip)) | |
355 | return -EFAULT; | |
356 | return 0; | |
357 | ||
358 | case EVIOCGRAB: | |
359 | if (arg) { | |
360 | if (evdev->grab) | |
361 | return -EBUSY; | |
362 | if (input_grab_device(&evdev->handle)) | |
363 | return -EBUSY; | |
364 | evdev->grab = list; | |
365 | return 0; | |
366 | } else { | |
367 | if (evdev->grab != list) | |
368 | return -EINVAL; | |
369 | input_release_device(&evdev->handle); | |
370 | evdev->grab = NULL; | |
371 | return 0; | |
372 | } | |
373 | ||
374 | default: | |
375 | ||
41e979f8 | 376 | if (_IOC_TYPE(cmd) != 'E') |
1da177e4 LT |
377 | return -EINVAL; |
378 | ||
41e979f8 VP |
379 | if (_IOC_DIR(cmd) == _IOC_READ) { |
380 | ||
381 | if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) { | |
382 | ||
383 | long *bits; | |
384 | int len; | |
385 | ||
386 | switch (_IOC_NR(cmd) & EV_MAX) { | |
387 | case 0: bits = dev->evbit; len = EV_MAX; break; | |
388 | case EV_KEY: bits = dev->keybit; len = KEY_MAX; break; | |
389 | case EV_REL: bits = dev->relbit; len = REL_MAX; break; | |
390 | case EV_ABS: bits = dev->absbit; len = ABS_MAX; break; | |
391 | case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break; | |
392 | case EV_LED: bits = dev->ledbit; len = LED_MAX; break; | |
393 | case EV_SND: bits = dev->sndbit; len = SND_MAX; break; | |
394 | case EV_FF: bits = dev->ffbit; len = FF_MAX; break; | |
31581066 | 395 | case EV_SW: bits = dev->swbit; len = SW_MAX; break; |
41e979f8 VP |
396 | default: return -EINVAL; |
397 | } | |
398 | len = NBITS(len) * sizeof(long); | |
399 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
400 | return copy_to_user(p, bits, len) ? -EFAULT : len; | |
1da177e4 | 401 | } |
1da177e4 | 402 | |
41e979f8 VP |
403 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0))) { |
404 | int len; | |
405 | len = NBITS(KEY_MAX) * sizeof(long); | |
406 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
407 | return copy_to_user(p, dev->key, len) ? -EFAULT : len; | |
408 | } | |
1da177e4 | 409 | |
41e979f8 VP |
410 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0))) { |
411 | int len; | |
412 | len = NBITS(LED_MAX) * sizeof(long); | |
413 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
414 | return copy_to_user(p, dev->led, len) ? -EFAULT : len; | |
415 | } | |
1da177e4 | 416 | |
41e979f8 VP |
417 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0))) { |
418 | int len; | |
419 | len = NBITS(SND_MAX) * sizeof(long); | |
420 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
421 | return copy_to_user(p, dev->snd, len) ? -EFAULT : len; | |
422 | } | |
1da177e4 | 423 | |
31581066 RP |
424 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0))) { |
425 | int len; | |
426 | len = NBITS(SW_MAX) * sizeof(long); | |
427 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
428 | return copy_to_user(p, dev->sw, len) ? -EFAULT : len; | |
429 | } | |
430 | ||
41e979f8 VP |
431 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0))) { |
432 | int len; | |
433 | if (!dev->name) return -ENOENT; | |
434 | len = strlen(dev->name) + 1; | |
435 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
436 | return copy_to_user(p, dev->name, len) ? -EFAULT : len; | |
437 | } | |
1da177e4 | 438 | |
41e979f8 VP |
439 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0))) { |
440 | int len; | |
441 | if (!dev->phys) return -ENOENT; | |
442 | len = strlen(dev->phys) + 1; | |
443 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
444 | return copy_to_user(p, dev->phys, len) ? -EFAULT : len; | |
445 | } | |
1da177e4 | 446 | |
41e979f8 VP |
447 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0))) { |
448 | int len; | |
449 | if (!dev->uniq) return -ENOENT; | |
450 | len = strlen(dev->uniq) + 1; | |
451 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
452 | return copy_to_user(p, dev->uniq, len) ? -EFAULT : len; | |
453 | } | |
1da177e4 | 454 | |
41e979f8 | 455 | if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) { |
1da177e4 | 456 | |
41e979f8 | 457 | int t = _IOC_NR(cmd) & ABS_MAX; |
1da177e4 | 458 | |
41e979f8 VP |
459 | abs.value = dev->abs[t]; |
460 | abs.minimum = dev->absmin[t]; | |
461 | abs.maximum = dev->absmax[t]; | |
462 | abs.fuzz = dev->absfuzz[t]; | |
463 | abs.flat = dev->absflat[t]; | |
1da177e4 | 464 | |
41e979f8 VP |
465 | if (copy_to_user(p, &abs, sizeof(struct input_absinfo))) |
466 | return -EFAULT; | |
467 | ||
468 | return 0; | |
469 | } | |
1da177e4 | 470 | |
1da177e4 LT |
471 | } |
472 | ||
41e979f8 | 473 | if (_IOC_DIR(cmd) == _IOC_WRITE) { |
1da177e4 | 474 | |
41e979f8 | 475 | if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) { |
1da177e4 | 476 | |
41e979f8 VP |
477 | int t = _IOC_NR(cmd) & ABS_MAX; |
478 | ||
479 | if (copy_from_user(&abs, p, sizeof(struct input_absinfo))) | |
480 | return -EFAULT; | |
1da177e4 | 481 | |
41e979f8 VP |
482 | dev->abs[t] = abs.value; |
483 | dev->absmin[t] = abs.minimum; | |
484 | dev->absmax[t] = abs.maximum; | |
485 | dev->absfuzz[t] = abs.fuzz; | |
486 | dev->absflat[t] = abs.flat; | |
1da177e4 | 487 | |
41e979f8 VP |
488 | return 0; |
489 | } | |
1da177e4 | 490 | } |
1da177e4 LT |
491 | } |
492 | return -EINVAL; | |
493 | } | |
1da177e4 | 494 | |
52658bb6 JK |
495 | #ifdef CONFIG_COMPAT |
496 | ||
497 | #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8) | |
498 | #define NBITS_COMPAT(x) ((((x)-1)/BITS_PER_LONG_COMPAT)+1) | |
499 | #define OFF_COMPAT(x) ((x)%BITS_PER_LONG_COMPAT) | |
500 | #define BIT_COMPAT(x) (1UL<<OFF_COMPAT(x)) | |
501 | #define LONG_COMPAT(x) ((x)/BITS_PER_LONG_COMPAT) | |
502 | #define test_bit_compat(bit, array) ((array[LONG_COMPAT(bit)] >> OFF_COMPAT(bit)) & 1) | |
503 | ||
41e979f8 VP |
504 | #ifdef __BIG_ENDIAN |
505 | #define bit_to_user(bit, max) \ | |
506 | do { \ | |
507 | int i; \ | |
508 | int len = NBITS_COMPAT((max)) * sizeof(compat_long_t); \ | |
509 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); \ | |
510 | for (i = 0; i < len / sizeof(compat_long_t); i++) \ | |
01703597 | 511 | if (copy_to_user((compat_long_t __user *) p + i, \ |
41e979f8 VP |
512 | (compat_long_t*) (bit) + i + 1 - ((i % 2) << 1), \ |
513 | sizeof(compat_long_t))) \ | |
514 | return -EFAULT; \ | |
515 | return len; \ | |
516 | } while (0) | |
517 | #else | |
518 | #define bit_to_user(bit, max) \ | |
519 | do { \ | |
520 | int len = NBITS_COMPAT((max)) * sizeof(compat_long_t); \ | |
521 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); \ | |
522 | return copy_to_user(p, (bit), len) ? -EFAULT : len; \ | |
523 | } while (0) | |
524 | #endif | |
525 | ||
52658bb6 JK |
526 | static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) |
527 | { | |
528 | struct evdev_list *list = file->private_data; | |
529 | struct evdev *evdev = list->evdev; | |
530 | struct input_dev *dev = evdev->handle.dev; | |
531 | struct input_absinfo abs; | |
532 | void __user *p = compat_ptr(arg); | |
1da177e4 | 533 | |
52658bb6 | 534 | if (!evdev->exist) return -ENODEV; |
1da177e4 | 535 | |
52658bb6 | 536 | switch (cmd) { |
1da177e4 | 537 | |
52658bb6 JK |
538 | case EVIOCGVERSION: |
539 | case EVIOCGID: | |
540 | case EVIOCGKEYCODE: | |
541 | case EVIOCSKEYCODE: | |
542 | case EVIOCSFF: | |
543 | case EVIOCRMFF: | |
544 | case EVIOCGEFFECTS: | |
545 | case EVIOCGRAB: | |
546 | return evdev_ioctl(file, cmd, (unsigned long) p); | |
1da177e4 | 547 | |
52658bb6 JK |
548 | default: |
549 | ||
41e979f8 | 550 | if (_IOC_TYPE(cmd) != 'E') |
52658bb6 JK |
551 | return -EINVAL; |
552 | ||
41e979f8 VP |
553 | if (_IOC_DIR(cmd) == _IOC_READ) { |
554 | ||
555 | if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) { | |
556 | long *bits; | |
557 | int max; | |
558 | ||
559 | switch (_IOC_NR(cmd) & EV_MAX) { | |
560 | case 0: bits = dev->evbit; max = EV_MAX; break; | |
561 | case EV_KEY: bits = dev->keybit; max = KEY_MAX; break; | |
562 | case EV_REL: bits = dev->relbit; max = REL_MAX; break; | |
563 | case EV_ABS: bits = dev->absbit; max = ABS_MAX; break; | |
564 | case EV_MSC: bits = dev->mscbit; max = MSC_MAX; break; | |
565 | case EV_LED: bits = dev->ledbit; max = LED_MAX; break; | |
566 | case EV_SND: bits = dev->sndbit; max = SND_MAX; break; | |
567 | case EV_FF: bits = dev->ffbit; max = FF_MAX; break; | |
e0be618d | 568 | case EV_SW: bits = dev->swbit; max = SW_MAX; break; |
41e979f8 VP |
569 | default: return -EINVAL; |
570 | } | |
571 | bit_to_user(bits, max); | |
52658bb6 | 572 | } |
52658bb6 | 573 | |
41e979f8 VP |
574 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0))) |
575 | bit_to_user(dev->key, KEY_MAX); | |
52658bb6 | 576 | |
41e979f8 VP |
577 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0))) |
578 | bit_to_user(dev->led, LED_MAX); | |
52658bb6 | 579 | |
41e979f8 VP |
580 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0))) |
581 | bit_to_user(dev->snd, SND_MAX); | |
52658bb6 | 582 | |
7972720a DT |
583 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0))) |
584 | bit_to_user(dev->sw, SW_MAX); | |
585 | ||
41e979f8 VP |
586 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0))) { |
587 | int len; | |
588 | if (!dev->name) return -ENOENT; | |
589 | len = strlen(dev->name) + 1; | |
590 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
591 | return copy_to_user(p, dev->name, len) ? -EFAULT : len; | |
592 | } | |
52658bb6 | 593 | |
41e979f8 VP |
594 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0))) { |
595 | int len; | |
596 | if (!dev->phys) return -ENOENT; | |
597 | len = strlen(dev->phys) + 1; | |
598 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
599 | return copy_to_user(p, dev->phys, len) ? -EFAULT : len; | |
600 | } | |
52658bb6 | 601 | |
41e979f8 VP |
602 | if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0))) { |
603 | int len; | |
604 | if (!dev->uniq) return -ENOENT; | |
605 | len = strlen(dev->uniq) + 1; | |
606 | if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); | |
607 | return copy_to_user(p, dev->uniq, len) ? -EFAULT : len; | |
608 | } | |
52658bb6 | 609 | |
41e979f8 | 610 | if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) { |
52658bb6 | 611 | |
41e979f8 | 612 | int t = _IOC_NR(cmd) & ABS_MAX; |
52658bb6 | 613 | |
41e979f8 VP |
614 | abs.value = dev->abs[t]; |
615 | abs.minimum = dev->absmin[t]; | |
616 | abs.maximum = dev->absmax[t]; | |
617 | abs.fuzz = dev->absfuzz[t]; | |
618 | abs.flat = dev->absflat[t]; | |
52658bb6 | 619 | |
41e979f8 VP |
620 | if (copy_to_user(p, &abs, sizeof(struct input_absinfo))) |
621 | return -EFAULT; | |
52658bb6 | 622 | |
41e979f8 VP |
623 | return 0; |
624 | } | |
1da177e4 LT |
625 | } |
626 | ||
41e979f8 | 627 | if (_IOC_DIR(cmd) == _IOC_WRITE) { |
1da177e4 | 628 | |
41e979f8 | 629 | if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) { |
1da177e4 | 630 | |
41e979f8 | 631 | int t = _IOC_NR(cmd) & ABS_MAX; |
1da177e4 | 632 | |
41e979f8 VP |
633 | if (copy_from_user(&abs, p, sizeof(struct input_absinfo))) |
634 | return -EFAULT; | |
1da177e4 | 635 | |
41e979f8 VP |
636 | dev->abs[t] = abs.value; |
637 | dev->absmin[t] = abs.minimum; | |
638 | dev->absmax[t] = abs.maximum; | |
639 | dev->absfuzz[t] = abs.fuzz; | |
640 | dev->absflat[t] = abs.flat; | |
641 | ||
642 | return 0; | |
643 | } | |
1da177e4 LT |
644 | } |
645 | } | |
646 | return -EINVAL; | |
647 | } | |
52658bb6 | 648 | #endif |
1da177e4 LT |
649 | |
650 | static struct file_operations evdev_fops = { | |
651 | .owner = THIS_MODULE, | |
652 | .read = evdev_read, | |
653 | .write = evdev_write, | |
654 | .poll = evdev_poll, | |
655 | .open = evdev_open, | |
656 | .release = evdev_release, | |
52658bb6 JK |
657 | .unlocked_ioctl = evdev_ioctl, |
658 | #ifdef CONFIG_COMPAT | |
659 | .compat_ioctl = evdev_ioctl_compat, | |
660 | #endif | |
1da177e4 LT |
661 | .fasync = evdev_fasync, |
662 | .flush = evdev_flush | |
663 | }; | |
664 | ||
665 | static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id) | |
666 | { | |
667 | struct evdev *evdev; | |
c9bcd582 | 668 | struct class_device *cdev; |
1da177e4 LT |
669 | int minor; |
670 | ||
671 | for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++); | |
672 | if (minor == EVDEV_MINORS) { | |
673 | printk(KERN_ERR "evdev: no more free evdev devices\n"); | |
674 | return NULL; | |
675 | } | |
676 | ||
677 | if (!(evdev = kmalloc(sizeof(struct evdev), GFP_KERNEL))) | |
678 | return NULL; | |
679 | memset(evdev, 0, sizeof(struct evdev)); | |
680 | ||
681 | INIT_LIST_HEAD(&evdev->list); | |
682 | init_waitqueue_head(&evdev->wait); | |
683 | ||
684 | evdev->exist = 1; | |
685 | evdev->minor = minor; | |
686 | evdev->handle.dev = dev; | |
687 | evdev->handle.name = evdev->name; | |
688 | evdev->handle.handler = handler; | |
689 | evdev->handle.private = evdev; | |
690 | sprintf(evdev->name, "event%d", minor); | |
691 | ||
692 | evdev_table[minor] = evdev; | |
693 | ||
c9bcd582 | 694 | cdev = class_device_create(&input_class, &dev->cdev, |
1235686f | 695 | MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor), |
c9bcd582 GKH |
696 | dev->cdev.dev, evdev->name); |
697 | ||
698 | /* temporary symlink to keep userspace happy */ | |
699 | sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj, | |
700 | evdev->name); | |
1da177e4 LT |
701 | |
702 | return &evdev->handle; | |
703 | } | |
704 | ||
705 | static void evdev_disconnect(struct input_handle *handle) | |
706 | { | |
707 | struct evdev *evdev = handle->private; | |
708 | struct evdev_list *list; | |
709 | ||
c9bcd582 | 710 | sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name); |
ea9f240b | 711 | class_device_destroy(&input_class, |
1235686f | 712 | MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor)); |
1da177e4 LT |
713 | evdev->exist = 0; |
714 | ||
715 | if (evdev->open) { | |
716 | input_close_device(handle); | |
717 | wake_up_interruptible(&evdev->wait); | |
718 | list_for_each_entry(list, &evdev->list, node) | |
719 | kill_fasync(&list->fasync, SIGIO, POLL_HUP); | |
720 | } else | |
721 | evdev_free(evdev); | |
722 | } | |
723 | ||
724 | static struct input_device_id evdev_ids[] = { | |
725 | { .driver_info = 1 }, /* Matches all devices */ | |
726 | { }, /* Terminating zero entry */ | |
727 | }; | |
728 | ||
729 | MODULE_DEVICE_TABLE(input, evdev_ids); | |
730 | ||
731 | static struct input_handler evdev_handler = { | |
732 | .event = evdev_event, | |
733 | .connect = evdev_connect, | |
734 | .disconnect = evdev_disconnect, | |
735 | .fops = &evdev_fops, | |
736 | .minor = EVDEV_MINOR_BASE, | |
737 | .name = "evdev", | |
738 | .id_table = evdev_ids, | |
739 | }; | |
740 | ||
741 | static int __init evdev_init(void) | |
742 | { | |
743 | input_register_handler(&evdev_handler); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | static void __exit evdev_exit(void) | |
748 | { | |
749 | input_unregister_handler(&evdev_handler); | |
750 | } | |
751 | ||
752 | module_init(evdev_init); | |
753 | module_exit(evdev_exit); | |
754 | ||
755 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
756 | MODULE_DESCRIPTION("Input driver event char devices"); | |
757 | MODULE_LICENSE("GPL"); |