Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * User level driver support for input subsystem | |
3 | * | |
4 | * Heavily based on evdev.c by Vojtech Pavlik | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org> | |
21 | * | |
22 | * Changes/Revisions: | |
23 | * 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>) | |
24 | * - added force feedback support | |
25 | * - added UI_SET_PHYS | |
26 | * 0.1 20/06/2002 | |
27 | * - first public version | |
28 | */ | |
29 | #include <linux/poll.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/input.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/fs.h> | |
36 | #include <linux/miscdevice.h> | |
37 | #include <linux/uinput.h> | |
38 | ||
1da177e4 LT |
39 | static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
40 | { | |
41 | struct uinput_device *udev; | |
42 | ||
43 | udev = dev->private; | |
44 | ||
45 | udev->buff[udev->head].type = type; | |
46 | udev->buff[udev->head].code = code; | |
47 | udev->buff[udev->head].value = value; | |
48 | do_gettimeofday(&udev->buff[udev->head].time); | |
49 | udev->head = (udev->head + 1) % UINPUT_BUFFER_SIZE; | |
50 | ||
51 | wake_up_interruptible(&udev->waitq); | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
0048e603 | 56 | static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request) |
1da177e4 LT |
57 | { |
58 | /* Atomically allocate an ID for the given request. Returns 0 on success. */ | |
1da177e4 | 59 | int id; |
152c12f5 | 60 | int err = -1; |
1da177e4 | 61 | |
0048e603 | 62 | spin_lock(&udev->requests_lock); |
152c12f5 DT |
63 | |
64 | for (id = 0; id < UINPUT_NUM_REQUESTS; id++) | |
1da177e4 | 65 | if (!udev->requests[id]) { |
1da177e4 | 66 | request->id = id; |
0048e603 | 67 | udev->requests[id] = request; |
152c12f5 DT |
68 | err = 0; |
69 | break; | |
1da177e4 | 70 | } |
152c12f5 | 71 | |
0048e603 | 72 | spin_unlock(&udev->requests_lock); |
152c12f5 | 73 | return err; |
1da177e4 LT |
74 | } |
75 | ||
76 | static struct uinput_request* uinput_request_find(struct uinput_device *udev, int id) | |
77 | { | |
78 | /* Find an input request, by ID. Returns NULL if the ID isn't valid. */ | |
79 | if (id >= UINPUT_NUM_REQUESTS || id < 0) | |
80 | return NULL; | |
1da177e4 LT |
81 | return udev->requests[id]; |
82 | } | |
83 | ||
0048e603 | 84 | static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request) |
1da177e4 | 85 | { |
0048e603 DT |
86 | /* Allocate slot. If none are available right away, wait. */ |
87 | return wait_event_interruptible(udev->requests_waitq, | |
88 | !uinput_request_alloc_id(udev, request)); | |
89 | } | |
1da177e4 | 90 | |
0048e603 DT |
91 | static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request) |
92 | { | |
0048e603 DT |
93 | /* Mark slot as available */ |
94 | udev->requests[request->id] = NULL; | |
e597f0c8 | 95 | wake_up(&udev->requests_waitq); |
e7507ed9 DT |
96 | |
97 | complete(&request->done); | |
1da177e4 LT |
98 | } |
99 | ||
0048e603 | 100 | static int uinput_request_submit(struct input_dev *dev, struct uinput_request *request) |
1da177e4 | 101 | { |
1da177e4 LT |
102 | /* Tell our userspace app about this new request by queueing an input event */ |
103 | uinput_dev_event(dev, EV_UINPUT, request->code, request->id); | |
104 | ||
105 | /* Wait for the request to complete */ | |
e597f0c8 DT |
106 | wait_for_completion(&request->done); |
107 | return request->retval; | |
1da177e4 LT |
108 | } |
109 | ||
110 | static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect) | |
111 | { | |
112 | struct uinput_request request; | |
0048e603 | 113 | int retval; |
1da177e4 LT |
114 | |
115 | if (!test_bit(EV_FF, dev->evbit)) | |
116 | return -ENOSYS; | |
117 | ||
0048e603 DT |
118 | request.id = -1; |
119 | init_completion(&request.done); | |
120 | request.code = UI_FF_UPLOAD; | |
1da177e4 | 121 | request.u.effect = effect; |
0048e603 DT |
122 | |
123 | retval = uinput_request_reserve_slot(dev->private, &request); | |
124 | if (!retval) | |
125 | retval = uinput_request_submit(dev, &request); | |
126 | ||
127 | return retval; | |
1da177e4 LT |
128 | } |
129 | ||
130 | static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id) | |
131 | { | |
132 | struct uinput_request request; | |
0048e603 | 133 | int retval; |
1da177e4 LT |
134 | |
135 | if (!test_bit(EV_FF, dev->evbit)) | |
136 | return -ENOSYS; | |
137 | ||
0048e603 DT |
138 | request.id = -1; |
139 | init_completion(&request.done); | |
140 | request.code = UI_FF_ERASE; | |
1da177e4 | 141 | request.u.effect_id = effect_id; |
0048e603 DT |
142 | |
143 | retval = uinput_request_reserve_slot(dev->private, &request); | |
144 | if (!retval) | |
145 | retval = uinput_request_submit(dev, &request); | |
146 | ||
147 | return retval; | |
1da177e4 LT |
148 | } |
149 | ||
29506415 | 150 | static void uinput_destroy_device(struct uinput_device *udev) |
1da177e4 | 151 | { |
29506415 DT |
152 | const char *name, *phys; |
153 | ||
154 | if (udev->dev) { | |
155 | name = udev->dev->name; | |
156 | phys = udev->dev->phys; | |
157 | if (udev->state == UIST_CREATED) | |
158 | input_unregister_device(udev->dev); | |
159 | else | |
160 | input_free_device(udev->dev); | |
161 | kfree(name); | |
162 | kfree(phys); | |
163 | udev->dev = NULL; | |
1da177e4 LT |
164 | } |
165 | ||
29506415 | 166 | udev->state = UIST_NEW_DEVICE; |
1da177e4 LT |
167 | } |
168 | ||
29506415 | 169 | static int uinput_create_device(struct uinput_device *udev) |
1da177e4 | 170 | { |
29506415 DT |
171 | int error; |
172 | ||
173 | if (udev->state != UIST_SETUP_COMPLETE) { | |
174 | printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME); | |
1da177e4 LT |
175 | return -EINVAL; |
176 | } | |
177 | ||
29506415 DT |
178 | error = input_register_device(udev->dev); |
179 | if (error) { | |
180 | uinput_destroy_device(udev); | |
181 | return error; | |
182 | } | |
1da177e4 | 183 | |
29506415 | 184 | udev->state = UIST_CREATED; |
1da177e4 LT |
185 | |
186 | return 0; | |
187 | } | |
188 | ||
189 | static int uinput_open(struct inode *inode, struct file *file) | |
190 | { | |
29506415 | 191 | struct uinput_device *newdev; |
1da177e4 | 192 | |
29506415 | 193 | newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL); |
1da177e4 | 194 | if (!newdev) |
29506415 DT |
195 | return -ENOMEM; |
196 | ||
221979aa | 197 | mutex_init(&newdev->mutex); |
0048e603 | 198 | spin_lock_init(&newdev->requests_lock); |
1da177e4 | 199 | init_waitqueue_head(&newdev->requests_waitq); |
29506415 DT |
200 | init_waitqueue_head(&newdev->waitq); |
201 | newdev->state = UIST_NEW_DEVICE; | |
1da177e4 LT |
202 | |
203 | file->private_data = newdev; | |
204 | ||
205 | return 0; | |
1da177e4 LT |
206 | } |
207 | ||
208 | static int uinput_validate_absbits(struct input_dev *dev) | |
209 | { | |
210 | unsigned int cnt; | |
211 | int retval = 0; | |
212 | ||
213 | for (cnt = 0; cnt < ABS_MAX + 1; cnt++) { | |
214 | if (!test_bit(cnt, dev->absbit)) | |
215 | continue; | |
216 | ||
217 | if ((dev->absmax[cnt] <= dev->absmin[cnt])) { | |
218 | printk(KERN_DEBUG | |
219 | "%s: invalid abs[%02x] min:%d max:%d\n", | |
220 | UINPUT_NAME, cnt, | |
221 | dev->absmin[cnt], dev->absmax[cnt]); | |
222 | retval = -EINVAL; | |
223 | break; | |
224 | } | |
225 | ||
226 | if (dev->absflat[cnt] > (dev->absmax[cnt] - dev->absmin[cnt])) { | |
227 | printk(KERN_DEBUG | |
228 | "%s: absflat[%02x] out of range: %d " | |
229 | "(min:%d/max:%d)\n", | |
230 | UINPUT_NAME, cnt, dev->absflat[cnt], | |
231 | dev->absmin[cnt], dev->absmax[cnt]); | |
232 | retval = -EINVAL; | |
233 | break; | |
234 | } | |
235 | } | |
236 | return retval; | |
237 | } | |
238 | ||
29506415 DT |
239 | static int uinput_allocate_device(struct uinput_device *udev) |
240 | { | |
241 | udev->dev = input_allocate_device(); | |
242 | if (!udev->dev) | |
243 | return -ENOMEM; | |
244 | ||
245 | udev->dev->event = uinput_dev_event; | |
246 | udev->dev->upload_effect = uinput_dev_upload_effect; | |
247 | udev->dev->erase_effect = uinput_dev_erase_effect; | |
248 | udev->dev->private = udev; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) | |
1da177e4 LT |
254 | { |
255 | struct uinput_user_dev *user_dev; | |
256 | struct input_dev *dev; | |
5b6271bd | 257 | char *name; |
152c12f5 DT |
258 | int size; |
259 | int retval; | |
1da177e4 | 260 | |
29506415 DT |
261 | if (count != sizeof(struct uinput_user_dev)) |
262 | return -EINVAL; | |
263 | ||
264 | if (!udev->dev) { | |
265 | retval = uinput_allocate_device(udev); | |
266 | if (retval) | |
267 | return retval; | |
268 | } | |
1da177e4 | 269 | |
1da177e4 LT |
270 | dev = udev->dev; |
271 | ||
152c12f5 | 272 | user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL); |
29506415 DT |
273 | if (!user_dev) |
274 | return -ENOMEM; | |
1da177e4 LT |
275 | |
276 | if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) { | |
277 | retval = -EFAULT; | |
278 | goto exit; | |
279 | } | |
280 | ||
1da177e4 | 281 | size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1; |
29506415 DT |
282 | if (!size) { |
283 | retval = -EINVAL; | |
284 | goto exit; | |
285 | } | |
286 | ||
287 | kfree(dev->name); | |
5b6271bd DT |
288 | dev->name = name = kmalloc(size, GFP_KERNEL); |
289 | if (!name) { | |
1da177e4 LT |
290 | retval = -ENOMEM; |
291 | goto exit; | |
292 | } | |
5b6271bd | 293 | strlcpy(name, user_dev->name, size); |
1da177e4 | 294 | |
1da177e4 LT |
295 | dev->id.bustype = user_dev->id.bustype; |
296 | dev->id.vendor = user_dev->id.vendor; | |
297 | dev->id.product = user_dev->id.product; | |
298 | dev->id.version = user_dev->id.version; | |
299 | dev->ff_effects_max = user_dev->ff_effects_max; | |
300 | ||
301 | size = sizeof(int) * (ABS_MAX + 1); | |
302 | memcpy(dev->absmax, user_dev->absmax, size); | |
303 | memcpy(dev->absmin, user_dev->absmin, size); | |
304 | memcpy(dev->absfuzz, user_dev->absfuzz, size); | |
305 | memcpy(dev->absflat, user_dev->absflat, size); | |
306 | ||
307 | /* check if absmin/absmax/absfuzz/absflat are filled as | |
308 | * told in Documentation/input/input-programming.txt */ | |
309 | if (test_bit(EV_ABS, dev->evbit)) { | |
29506415 DT |
310 | retval = uinput_validate_absbits(dev); |
311 | if (retval < 0) | |
312 | goto exit; | |
1da177e4 LT |
313 | } |
314 | ||
29506415 DT |
315 | udev->state = UIST_SETUP_COMPLETE; |
316 | retval = count; | |
317 | ||
318 | exit: | |
1da177e4 LT |
319 | kfree(user_dev); |
320 | return retval; | |
321 | } | |
322 | ||
29506415 DT |
323 | static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) |
324 | { | |
325 | struct input_event ev; | |
326 | ||
327 | if (count != sizeof(struct input_event)) | |
328 | return -EINVAL; | |
329 | ||
330 | if (copy_from_user(&ev, buffer, sizeof(struct input_event))) | |
331 | return -EFAULT; | |
332 | ||
333 | input_event(udev->dev, ev.type, ev.code, ev.value); | |
334 | ||
335 | return sizeof(struct input_event); | |
336 | } | |
337 | ||
1da177e4 LT |
338 | static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
339 | { | |
340 | struct uinput_device *udev = file->private_data; | |
29506415 | 341 | int retval; |
1da177e4 | 342 | |
221979aa | 343 | retval = mutex_lock_interruptible(&udev->mutex); |
29506415 DT |
344 | if (retval) |
345 | return retval; | |
346 | ||
347 | retval = udev->state == UIST_CREATED ? | |
348 | uinput_inject_event(udev, buffer, count) : | |
349 | uinput_setup_device(udev, buffer, count); | |
1da177e4 | 350 | |
221979aa | 351 | mutex_unlock(&udev->mutex); |
1da177e4 | 352 | |
29506415 | 353 | return retval; |
1da177e4 LT |
354 | } |
355 | ||
356 | static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) | |
357 | { | |
358 | struct uinput_device *udev = file->private_data; | |
359 | int retval = 0; | |
360 | ||
29506415 | 361 | if (udev->state != UIST_CREATED) |
1da177e4 LT |
362 | return -ENODEV; |
363 | ||
152c12f5 | 364 | if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK)) |
1da177e4 LT |
365 | return -EAGAIN; |
366 | ||
367 | retval = wait_event_interruptible(udev->waitq, | |
29506415 | 368 | udev->head != udev->tail || udev->state != UIST_CREATED); |
1da177e4 LT |
369 | if (retval) |
370 | return retval; | |
371 | ||
221979aa | 372 | retval = mutex_lock_interruptible(&udev->mutex); |
29506415 DT |
373 | if (retval) |
374 | return retval; | |
375 | ||
376 | if (udev->state != UIST_CREATED) { | |
377 | retval = -ENODEV; | |
378 | goto out; | |
379 | } | |
1da177e4 | 380 | |
29506415 DT |
381 | while (udev->head != udev->tail && retval + sizeof(struct input_event) <= count) { |
382 | if (copy_to_user(buffer + retval, &udev->buff[udev->tail], sizeof(struct input_event))) { | |
383 | retval = -EFAULT; | |
384 | goto out; | |
385 | } | |
1da177e4 LT |
386 | udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; |
387 | retval += sizeof(struct input_event); | |
388 | } | |
389 | ||
29506415 | 390 | out: |
221979aa | 391 | mutex_unlock(&udev->mutex); |
29506415 | 392 | |
1da177e4 LT |
393 | return retval; |
394 | } | |
395 | ||
396 | static unsigned int uinput_poll(struct file *file, poll_table *wait) | |
397 | { | |
398 | struct uinput_device *udev = file->private_data; | |
399 | ||
400 | poll_wait(file, &udev->waitq, wait); | |
401 | ||
402 | if (udev->head != udev->tail) | |
403 | return POLLIN | POLLRDNORM; | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
29506415 | 408 | static int uinput_release(struct inode *inode, struct file *file) |
1da177e4 | 409 | { |
29506415 | 410 | struct uinput_device *udev = file->private_data; |
1da177e4 | 411 | |
29506415 | 412 | uinput_destroy_device(udev); |
1da177e4 LT |
413 | kfree(udev); |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
29506415 DT |
418 | #define uinput_set_bit(_arg, _bit, _max) \ |
419 | ({ \ | |
420 | int __ret = 0; \ | |
421 | if (udev->state == UIST_CREATED) \ | |
422 | __ret = -EINVAL; \ | |
423 | else if ((_arg) > (_max)) \ | |
424 | __ret = -EINVAL; \ | |
425 | else set_bit((_arg), udev->dev->_bit); \ | |
426 | __ret; \ | |
427 | }) | |
428 | ||
429 | static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1da177e4 | 430 | { |
29506415 | 431 | int retval; |
1da177e4 LT |
432 | struct uinput_device *udev; |
433 | void __user *p = (void __user *)arg; | |
434 | struct uinput_ff_upload ff_up; | |
435 | struct uinput_ff_erase ff_erase; | |
436 | struct uinput_request *req; | |
437 | int length; | |
5b6271bd | 438 | char *phys; |
1da177e4 LT |
439 | |
440 | udev = file->private_data; | |
441 | ||
221979aa | 442 | retval = mutex_lock_interruptible(&udev->mutex); |
29506415 DT |
443 | if (retval) |
444 | return retval; | |
445 | ||
446 | if (!udev->dev) { | |
447 | retval = uinput_allocate_device(udev); | |
448 | if (retval) | |
449 | goto out; | |
1da177e4 LT |
450 | } |
451 | ||
452 | switch (cmd) { | |
453 | case UI_DEV_CREATE: | |
454 | retval = uinput_create_device(udev); | |
455 | break; | |
456 | ||
457 | case UI_DEV_DESTROY: | |
29506415 | 458 | uinput_destroy_device(udev); |
1da177e4 LT |
459 | break; |
460 | ||
461 | case UI_SET_EVBIT: | |
29506415 | 462 | retval = uinput_set_bit(arg, evbit, EV_MAX); |
1da177e4 LT |
463 | break; |
464 | ||
465 | case UI_SET_KEYBIT: | |
29506415 | 466 | retval = uinput_set_bit(arg, keybit, KEY_MAX); |
1da177e4 LT |
467 | break; |
468 | ||
469 | case UI_SET_RELBIT: | |
29506415 | 470 | retval = uinput_set_bit(arg, relbit, REL_MAX); |
1da177e4 LT |
471 | break; |
472 | ||
473 | case UI_SET_ABSBIT: | |
29506415 | 474 | retval = uinput_set_bit(arg, absbit, ABS_MAX); |
1da177e4 LT |
475 | break; |
476 | ||
477 | case UI_SET_MSCBIT: | |
29506415 | 478 | retval = uinput_set_bit(arg, mscbit, MSC_MAX); |
1da177e4 LT |
479 | break; |
480 | ||
481 | case UI_SET_LEDBIT: | |
29506415 | 482 | retval = uinput_set_bit(arg, ledbit, LED_MAX); |
1da177e4 LT |
483 | break; |
484 | ||
485 | case UI_SET_SNDBIT: | |
29506415 | 486 | retval = uinput_set_bit(arg, sndbit, SND_MAX); |
1da177e4 LT |
487 | break; |
488 | ||
489 | case UI_SET_FFBIT: | |
29506415 | 490 | retval = uinput_set_bit(arg, ffbit, FF_MAX); |
1da177e4 LT |
491 | break; |
492 | ||
59c7c037 DT |
493 | case UI_SET_SWBIT: |
494 | retval = uinput_set_bit(arg, swbit, SW_MAX); | |
495 | break; | |
496 | ||
1da177e4 | 497 | case UI_SET_PHYS: |
29506415 DT |
498 | if (udev->state == UIST_CREATED) { |
499 | retval = -EINVAL; | |
500 | goto out; | |
501 | } | |
1da177e4 LT |
502 | length = strnlen_user(p, 1024); |
503 | if (length <= 0) { | |
504 | retval = -EFAULT; | |
505 | break; | |
506 | } | |
5b6271bd DT |
507 | kfree(udev->dev->phys); |
508 | udev->dev->phys = phys = kmalloc(length, GFP_KERNEL); | |
509 | if (!phys) { | |
1da177e4 LT |
510 | retval = -ENOMEM; |
511 | break; | |
512 | } | |
5b6271bd | 513 | if (copy_from_user(phys, p, length)) { |
1da177e4 | 514 | udev->dev->phys = NULL; |
5b6271bd DT |
515 | kfree(phys); |
516 | retval = -EFAULT; | |
1da177e4 LT |
517 | break; |
518 | } | |
5b6271bd | 519 | phys[length - 1] = '\0'; |
1da177e4 LT |
520 | break; |
521 | ||
522 | case UI_BEGIN_FF_UPLOAD: | |
523 | if (copy_from_user(&ff_up, p, sizeof(ff_up))) { | |
524 | retval = -EFAULT; | |
525 | break; | |
526 | } | |
527 | req = uinput_request_find(udev, ff_up.request_id); | |
152c12f5 | 528 | if (!(req && req->code == UI_FF_UPLOAD && req->u.effect)) { |
1da177e4 LT |
529 | retval = -EINVAL; |
530 | break; | |
531 | } | |
532 | ff_up.retval = 0; | |
533 | memcpy(&ff_up.effect, req->u.effect, sizeof(struct ff_effect)); | |
534 | if (copy_to_user(p, &ff_up, sizeof(ff_up))) { | |
535 | retval = -EFAULT; | |
536 | break; | |
537 | } | |
538 | break; | |
539 | ||
540 | case UI_BEGIN_FF_ERASE: | |
541 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { | |
542 | retval = -EFAULT; | |
543 | break; | |
544 | } | |
545 | req = uinput_request_find(udev, ff_erase.request_id); | |
152c12f5 | 546 | if (!(req && req->code == UI_FF_ERASE)) { |
1da177e4 LT |
547 | retval = -EINVAL; |
548 | break; | |
549 | } | |
550 | ff_erase.retval = 0; | |
551 | ff_erase.effect_id = req->u.effect_id; | |
552 | if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) { | |
553 | retval = -EFAULT; | |
554 | break; | |
555 | } | |
556 | break; | |
557 | ||
558 | case UI_END_FF_UPLOAD: | |
559 | if (copy_from_user(&ff_up, p, sizeof(ff_up))) { | |
560 | retval = -EFAULT; | |
561 | break; | |
562 | } | |
563 | req = uinput_request_find(udev, ff_up.request_id); | |
152c12f5 | 564 | if (!(req && req->code == UI_FF_UPLOAD && req->u.effect)) { |
1da177e4 LT |
565 | retval = -EINVAL; |
566 | break; | |
567 | } | |
568 | req->retval = ff_up.retval; | |
569 | memcpy(req->u.effect, &ff_up.effect, sizeof(struct ff_effect)); | |
0048e603 | 570 | uinput_request_done(udev, req); |
1da177e4 LT |
571 | break; |
572 | ||
573 | case UI_END_FF_ERASE: | |
574 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { | |
575 | retval = -EFAULT; | |
576 | break; | |
577 | } | |
578 | req = uinput_request_find(udev, ff_erase.request_id); | |
152c12f5 | 579 | if (!(req && req->code == UI_FF_ERASE)) { |
1da177e4 LT |
580 | retval = -EINVAL; |
581 | break; | |
582 | } | |
583 | req->retval = ff_erase.retval; | |
0048e603 | 584 | uinput_request_done(udev, req); |
1da177e4 LT |
585 | break; |
586 | ||
587 | default: | |
588 | retval = -EINVAL; | |
589 | } | |
29506415 DT |
590 | |
591 | out: | |
221979aa | 592 | mutex_unlock(&udev->mutex); |
1da177e4 LT |
593 | return retval; |
594 | } | |
595 | ||
596 | static struct file_operations uinput_fops = { | |
29506415 DT |
597 | .owner = THIS_MODULE, |
598 | .open = uinput_open, | |
599 | .release = uinput_release, | |
600 | .read = uinput_read, | |
601 | .write = uinput_write, | |
602 | .poll = uinput_poll, | |
603 | .unlocked_ioctl = uinput_ioctl, | |
1da177e4 LT |
604 | }; |
605 | ||
606 | static struct miscdevice uinput_misc = { | |
29506415 DT |
607 | .fops = &uinput_fops, |
608 | .minor = UINPUT_MINOR, | |
609 | .name = UINPUT_NAME, | |
1da177e4 LT |
610 | }; |
611 | ||
612 | static int __init uinput_init(void) | |
613 | { | |
614 | return misc_register(&uinput_misc); | |
615 | } | |
616 | ||
617 | static void __exit uinput_exit(void) | |
618 | { | |
619 | misc_deregister(&uinput_misc); | |
620 | } | |
621 | ||
622 | MODULE_AUTHOR("Aristeu Sergio Rozanski Filho"); | |
623 | MODULE_DESCRIPTION("User level driver support for input subsystem"); | |
624 | MODULE_LICENSE("GPL"); | |
625 | ||
626 | module_init(uinput_init); | |
627 | module_exit(uinput_exit); | |
628 |