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