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Commit | Line | Data |
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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: | |
ff462551 AH |
23 | * 0.3 09/04/2006 (Anssi Hannula <anssi.hannula@gmail.com>) |
24 | * - updated ff support for the changes in kernel interface | |
25 | * - added MODULE_VERSION | |
1da177e4 LT |
26 | * 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>) |
27 | * - added force feedback support | |
28 | * - added UI_SET_PHYS | |
29 | * 0.1 20/06/2002 | |
30 | * - first public version | |
31 | */ | |
32 | #include <linux/poll.h> | |
a99bbaf5 | 33 | #include <linux/sched.h> |
1da177e4 LT |
34 | #include <linux/slab.h> |
35 | #include <linux/module.h> | |
36 | #include <linux/init.h> | |
1da177e4 LT |
37 | #include <linux/fs.h> |
38 | #include <linux/miscdevice.h> | |
39 | #include <linux/uinput.h> | |
2d56f3a3 | 40 | #include "../input-compat.h" |
1da177e4 | 41 | |
1da177e4 LT |
42 | static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
43 | { | |
373f9713 | 44 | struct uinput_device *udev = input_get_drvdata(dev); |
1da177e4 LT |
45 | |
46 | udev->buff[udev->head].type = type; | |
47 | udev->buff[udev->head].code = code; | |
48 | udev->buff[udev->head].value = value; | |
49 | do_gettimeofday(&udev->buff[udev->head].time); | |
50 | udev->head = (udev->head + 1) % UINPUT_BUFFER_SIZE; | |
51 | ||
52 | wake_up_interruptible(&udev->waitq); | |
53 | ||
54 | return 0; | |
55 | } | |
56 | ||
05cebd38 | 57 | /* Atomically allocate an ID for the given request. Returns 0 on success. */ |
0048e603 | 58 | static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request) |
1da177e4 | 59 | { |
1da177e4 | 60 | int id; |
152c12f5 | 61 | int err = -1; |
1da177e4 | 62 | |
0048e603 | 63 | spin_lock(&udev->requests_lock); |
152c12f5 | 64 | |
05cebd38 | 65 | for (id = 0; id < UINPUT_NUM_REQUESTS; id++) { |
1da177e4 | 66 | if (!udev->requests[id]) { |
1da177e4 | 67 | request->id = id; |
0048e603 | 68 | udev->requests[id] = request; |
152c12f5 DT |
69 | err = 0; |
70 | break; | |
1da177e4 | 71 | } |
05cebd38 | 72 | } |
152c12f5 | 73 | |
0048e603 | 74 | spin_unlock(&udev->requests_lock); |
152c12f5 | 75 | return err; |
1da177e4 LT |
76 | } |
77 | ||
05cebd38 | 78 | static struct uinput_request *uinput_request_find(struct uinput_device *udev, int id) |
1da177e4 LT |
79 | { |
80 | /* Find an input request, by ID. Returns NULL if the ID isn't valid. */ | |
81 | if (id >= UINPUT_NUM_REQUESTS || id < 0) | |
82 | return NULL; | |
2d56f3a3 | 83 | |
1da177e4 LT |
84 | return udev->requests[id]; |
85 | } | |
86 | ||
0048e603 | 87 | static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request) |
1da177e4 | 88 | { |
0048e603 DT |
89 | /* Allocate slot. If none are available right away, wait. */ |
90 | return wait_event_interruptible(udev->requests_waitq, | |
91 | !uinput_request_alloc_id(udev, request)); | |
92 | } | |
1da177e4 | 93 | |
0048e603 DT |
94 | static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request) |
95 | { | |
0048e603 DT |
96 | /* Mark slot as available */ |
97 | udev->requests[request->id] = NULL; | |
e597f0c8 | 98 | wake_up(&udev->requests_waitq); |
e7507ed9 DT |
99 | |
100 | complete(&request->done); | |
1da177e4 LT |
101 | } |
102 | ||
05cebd38 | 103 | static int uinput_request_submit(struct uinput_device *udev, struct uinput_request *request) |
1da177e4 | 104 | { |
05cebd38 ASRF |
105 | int retval; |
106 | ||
107 | retval = uinput_request_reserve_slot(udev, request); | |
108 | if (retval) | |
109 | return retval; | |
110 | ||
111 | retval = mutex_lock_interruptible(&udev->mutex); | |
112 | if (retval) | |
113 | return retval; | |
114 | ||
115 | if (udev->state != UIST_CREATED) { | |
116 | retval = -ENODEV; | |
117 | goto out; | |
118 | } | |
119 | ||
1da177e4 | 120 | /* Tell our userspace app about this new request by queueing an input event */ |
05cebd38 ASRF |
121 | uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id); |
122 | ||
123 | out: | |
124 | mutex_unlock(&udev->mutex); | |
125 | return retval; | |
126 | } | |
127 | ||
128 | /* | |
129 | * Fail all ouitstanding requests so handlers don't wait for the userspace | |
130 | * to finish processing them. | |
131 | */ | |
132 | static void uinput_flush_requests(struct uinput_device *udev) | |
133 | { | |
134 | struct uinput_request *request; | |
135 | int i; | |
1da177e4 | 136 | |
05cebd38 ASRF |
137 | spin_lock(&udev->requests_lock); |
138 | ||
139 | for (i = 0; i < UINPUT_NUM_REQUESTS; i++) { | |
140 | request = udev->requests[i]; | |
141 | if (request) { | |
142 | request->retval = -ENODEV; | |
143 | uinput_request_done(udev, request); | |
144 | } | |
145 | } | |
146 | ||
147 | spin_unlock(&udev->requests_lock); | |
1da177e4 LT |
148 | } |
149 | ||
ff462551 AH |
150 | static void uinput_dev_set_gain(struct input_dev *dev, u16 gain) |
151 | { | |
152 | uinput_dev_event(dev, EV_FF, FF_GAIN, gain); | |
153 | } | |
154 | ||
155 | static void uinput_dev_set_autocenter(struct input_dev *dev, u16 magnitude) | |
156 | { | |
157 | uinput_dev_event(dev, EV_FF, FF_AUTOCENTER, magnitude); | |
158 | } | |
159 | ||
160 | static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value) | |
161 | { | |
162 | return uinput_dev_event(dev, EV_FF, effect_id, value); | |
163 | } | |
164 | ||
165 | static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old) | |
1da177e4 | 166 | { |
05cebd38 | 167 | struct uinput_device *udev = input_get_drvdata(dev); |
1da177e4 | 168 | struct uinput_request request; |
0048e603 | 169 | int retval; |
1da177e4 | 170 | |
2d56f3a3 PL |
171 | /* |
172 | * uinput driver does not currently support periodic effects with | |
173 | * custom waveform since it does not have a way to pass buffer of | |
174 | * samples (custom_data) to userspace. If ever there is a device | |
175 | * supporting custom waveforms we would need to define an additional | |
176 | * ioctl (UI_UPLOAD_SAMPLES) but for now we just bail out. | |
177 | */ | |
178 | if (effect->type == FF_PERIODIC && | |
179 | effect->u.periodic.waveform == FF_CUSTOM) | |
180 | return -EINVAL; | |
181 | ||
0048e603 DT |
182 | request.id = -1; |
183 | init_completion(&request.done); | |
184 | request.code = UI_FF_UPLOAD; | |
ff462551 AH |
185 | request.u.upload.effect = effect; |
186 | request.u.upload.old = old; | |
0048e603 | 187 | |
05cebd38 ASRF |
188 | retval = uinput_request_submit(udev, &request); |
189 | if (!retval) { | |
190 | wait_for_completion(&request.done); | |
191 | retval = request.retval; | |
192 | } | |
0048e603 DT |
193 | |
194 | return retval; | |
1da177e4 LT |
195 | } |
196 | ||
197 | static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id) | |
198 | { | |
05cebd38 | 199 | struct uinput_device *udev = input_get_drvdata(dev); |
1da177e4 | 200 | struct uinput_request request; |
0048e603 | 201 | int retval; |
1da177e4 LT |
202 | |
203 | if (!test_bit(EV_FF, dev->evbit)) | |
204 | return -ENOSYS; | |
205 | ||
0048e603 DT |
206 | request.id = -1; |
207 | init_completion(&request.done); | |
208 | request.code = UI_FF_ERASE; | |
1da177e4 | 209 | request.u.effect_id = effect_id; |
0048e603 | 210 | |
05cebd38 ASRF |
211 | retval = uinput_request_submit(udev, &request); |
212 | if (!retval) { | |
213 | wait_for_completion(&request.done); | |
214 | retval = request.retval; | |
215 | } | |
0048e603 DT |
216 | |
217 | return retval; | |
1da177e4 LT |
218 | } |
219 | ||
29506415 | 220 | static void uinput_destroy_device(struct uinput_device *udev) |
1da177e4 | 221 | { |
29506415 | 222 | const char *name, *phys; |
05cebd38 ASRF |
223 | struct input_dev *dev = udev->dev; |
224 | enum uinput_state old_state = udev->state; | |
225 | ||
226 | udev->state = UIST_NEW_DEVICE; | |
29506415 | 227 | |
05cebd38 ASRF |
228 | if (dev) { |
229 | name = dev->name; | |
230 | phys = dev->phys; | |
231 | if (old_state == UIST_CREATED) { | |
232 | uinput_flush_requests(udev); | |
233 | input_unregister_device(dev); | |
234 | } else { | |
235 | input_free_device(dev); | |
236 | } | |
29506415 DT |
237 | kfree(name); |
238 | kfree(phys); | |
239 | udev->dev = NULL; | |
1da177e4 | 240 | } |
1da177e4 LT |
241 | } |
242 | ||
29506415 | 243 | static int uinput_create_device(struct uinput_device *udev) |
1da177e4 | 244 | { |
ff462551 | 245 | struct input_dev *dev = udev->dev; |
29506415 DT |
246 | int error; |
247 | ||
248 | if (udev->state != UIST_SETUP_COMPLETE) { | |
249 | printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME); | |
1da177e4 LT |
250 | return -EINVAL; |
251 | } | |
252 | ||
ff462551 AH |
253 | if (udev->ff_effects_max) { |
254 | error = input_ff_create(dev, udev->ff_effects_max); | |
255 | if (error) | |
256 | goto fail1; | |
257 | ||
258 | dev->ff->upload = uinput_dev_upload_effect; | |
259 | dev->ff->erase = uinput_dev_erase_effect; | |
260 | dev->ff->playback = uinput_dev_playback; | |
261 | dev->ff->set_gain = uinput_dev_set_gain; | |
262 | dev->ff->set_autocenter = uinput_dev_set_autocenter; | |
29506415 | 263 | } |
1da177e4 | 264 | |
ff462551 AH |
265 | error = input_register_device(udev->dev); |
266 | if (error) | |
267 | goto fail2; | |
268 | ||
29506415 | 269 | udev->state = UIST_CREATED; |
1da177e4 LT |
270 | |
271 | return 0; | |
ff462551 AH |
272 | |
273 | fail2: input_ff_destroy(dev); | |
274 | fail1: uinput_destroy_device(udev); | |
275 | return error; | |
1da177e4 LT |
276 | } |
277 | ||
278 | static int uinput_open(struct inode *inode, struct file *file) | |
279 | { | |
29506415 | 280 | struct uinput_device *newdev; |
1da177e4 | 281 | |
29506415 | 282 | newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL); |
1da177e4 | 283 | if (!newdev) |
29506415 DT |
284 | return -ENOMEM; |
285 | ||
221979aa | 286 | mutex_init(&newdev->mutex); |
0048e603 | 287 | spin_lock_init(&newdev->requests_lock); |
1da177e4 | 288 | init_waitqueue_head(&newdev->requests_waitq); |
29506415 DT |
289 | init_waitqueue_head(&newdev->waitq); |
290 | newdev->state = UIST_NEW_DEVICE; | |
1da177e4 LT |
291 | |
292 | file->private_data = newdev; | |
daf8a96b | 293 | nonseekable_open(inode, file); |
1da177e4 LT |
294 | |
295 | return 0; | |
1da177e4 LT |
296 | } |
297 | ||
298 | static int uinput_validate_absbits(struct input_dev *dev) | |
299 | { | |
300 | unsigned int cnt; | |
301 | int retval = 0; | |
302 | ||
303 | for (cnt = 0; cnt < ABS_MAX + 1; cnt++) { | |
304 | if (!test_bit(cnt, dev->absbit)) | |
305 | continue; | |
306 | ||
307 | if ((dev->absmax[cnt] <= dev->absmin[cnt])) { | |
308 | printk(KERN_DEBUG | |
309 | "%s: invalid abs[%02x] min:%d max:%d\n", | |
310 | UINPUT_NAME, cnt, | |
311 | dev->absmin[cnt], dev->absmax[cnt]); | |
312 | retval = -EINVAL; | |
313 | break; | |
314 | } | |
315 | ||
316 | if (dev->absflat[cnt] > (dev->absmax[cnt] - dev->absmin[cnt])) { | |
317 | printk(KERN_DEBUG | |
318 | "%s: absflat[%02x] out of range: %d " | |
319 | "(min:%d/max:%d)\n", | |
320 | UINPUT_NAME, cnt, dev->absflat[cnt], | |
321 | dev->absmin[cnt], dev->absmax[cnt]); | |
322 | retval = -EINVAL; | |
323 | break; | |
324 | } | |
325 | } | |
326 | return retval; | |
327 | } | |
328 | ||
29506415 DT |
329 | static int uinput_allocate_device(struct uinput_device *udev) |
330 | { | |
331 | udev->dev = input_allocate_device(); | |
332 | if (!udev->dev) | |
333 | return -ENOMEM; | |
334 | ||
335 | udev->dev->event = uinput_dev_event; | |
373f9713 | 336 | input_set_drvdata(udev->dev, udev); |
29506415 DT |
337 | |
338 | return 0; | |
339 | } | |
340 | ||
341 | static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) | |
1da177e4 LT |
342 | { |
343 | struct uinput_user_dev *user_dev; | |
344 | struct input_dev *dev; | |
5b6271bd | 345 | char *name; |
152c12f5 DT |
346 | int size; |
347 | int retval; | |
1da177e4 | 348 | |
29506415 DT |
349 | if (count != sizeof(struct uinput_user_dev)) |
350 | return -EINVAL; | |
351 | ||
352 | if (!udev->dev) { | |
353 | retval = uinput_allocate_device(udev); | |
354 | if (retval) | |
355 | return retval; | |
356 | } | |
1da177e4 | 357 | |
1da177e4 LT |
358 | dev = udev->dev; |
359 | ||
152c12f5 | 360 | user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL); |
29506415 DT |
361 | if (!user_dev) |
362 | return -ENOMEM; | |
1da177e4 LT |
363 | |
364 | if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) { | |
365 | retval = -EFAULT; | |
366 | goto exit; | |
367 | } | |
368 | ||
ff462551 AH |
369 | udev->ff_effects_max = user_dev->ff_effects_max; |
370 | ||
1da177e4 | 371 | size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1; |
29506415 DT |
372 | if (!size) { |
373 | retval = -EINVAL; | |
374 | goto exit; | |
375 | } | |
376 | ||
377 | kfree(dev->name); | |
5b6271bd DT |
378 | dev->name = name = kmalloc(size, GFP_KERNEL); |
379 | if (!name) { | |
1da177e4 LT |
380 | retval = -ENOMEM; |
381 | goto exit; | |
382 | } | |
5b6271bd | 383 | strlcpy(name, user_dev->name, size); |
1da177e4 | 384 | |
1da177e4 LT |
385 | dev->id.bustype = user_dev->id.bustype; |
386 | dev->id.vendor = user_dev->id.vendor; | |
387 | dev->id.product = user_dev->id.product; | |
388 | dev->id.version = user_dev->id.version; | |
1da177e4 LT |
389 | |
390 | size = sizeof(int) * (ABS_MAX + 1); | |
391 | memcpy(dev->absmax, user_dev->absmax, size); | |
392 | memcpy(dev->absmin, user_dev->absmin, size); | |
393 | memcpy(dev->absfuzz, user_dev->absfuzz, size); | |
394 | memcpy(dev->absflat, user_dev->absflat, size); | |
395 | ||
396 | /* check if absmin/absmax/absfuzz/absflat are filled as | |
397 | * told in Documentation/input/input-programming.txt */ | |
398 | if (test_bit(EV_ABS, dev->evbit)) { | |
29506415 DT |
399 | retval = uinput_validate_absbits(dev); |
400 | if (retval < 0) | |
401 | goto exit; | |
1da177e4 LT |
402 | } |
403 | ||
29506415 DT |
404 | udev->state = UIST_SETUP_COMPLETE; |
405 | retval = count; | |
406 | ||
407 | exit: | |
1da177e4 LT |
408 | kfree(user_dev); |
409 | return retval; | |
410 | } | |
411 | ||
29506415 DT |
412 | static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) |
413 | { | |
414 | struct input_event ev; | |
415 | ||
2d56f3a3 | 416 | if (count < input_event_size()) |
29506415 DT |
417 | return -EINVAL; |
418 | ||
2d56f3a3 | 419 | if (input_event_from_user(buffer, &ev)) |
29506415 DT |
420 | return -EFAULT; |
421 | ||
422 | input_event(udev->dev, ev.type, ev.code, ev.value); | |
423 | ||
2d56f3a3 | 424 | return input_event_size(); |
29506415 DT |
425 | } |
426 | ||
1da177e4 LT |
427 | static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
428 | { | |
429 | struct uinput_device *udev = file->private_data; | |
29506415 | 430 | int retval; |
1da177e4 | 431 | |
221979aa | 432 | retval = mutex_lock_interruptible(&udev->mutex); |
29506415 DT |
433 | if (retval) |
434 | return retval; | |
435 | ||
436 | retval = udev->state == UIST_CREATED ? | |
437 | uinput_inject_event(udev, buffer, count) : | |
438 | uinput_setup_device(udev, buffer, count); | |
1da177e4 | 439 | |
221979aa | 440 | mutex_unlock(&udev->mutex); |
1da177e4 | 441 | |
29506415 | 442 | return retval; |
1da177e4 LT |
443 | } |
444 | ||
445 | static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) | |
446 | { | |
447 | struct uinput_device *udev = file->private_data; | |
448 | int retval = 0; | |
449 | ||
29506415 | 450 | if (udev->state != UIST_CREATED) |
1da177e4 LT |
451 | return -ENODEV; |
452 | ||
152c12f5 | 453 | if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK)) |
1da177e4 LT |
454 | return -EAGAIN; |
455 | ||
456 | retval = wait_event_interruptible(udev->waitq, | |
29506415 | 457 | udev->head != udev->tail || udev->state != UIST_CREATED); |
1da177e4 LT |
458 | if (retval) |
459 | return retval; | |
460 | ||
221979aa | 461 | retval = mutex_lock_interruptible(&udev->mutex); |
29506415 DT |
462 | if (retval) |
463 | return retval; | |
464 | ||
465 | if (udev->state != UIST_CREATED) { | |
466 | retval = -ENODEV; | |
467 | goto out; | |
468 | } | |
1da177e4 | 469 | |
2d56f3a3 PL |
470 | while (udev->head != udev->tail && retval + input_event_size() <= count) { |
471 | if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) { | |
29506415 DT |
472 | retval = -EFAULT; |
473 | goto out; | |
474 | } | |
1da177e4 | 475 | udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; |
2d56f3a3 | 476 | retval += input_event_size(); |
1da177e4 LT |
477 | } |
478 | ||
29506415 | 479 | out: |
221979aa | 480 | mutex_unlock(&udev->mutex); |
29506415 | 481 | |
1da177e4 LT |
482 | return retval; |
483 | } | |
484 | ||
485 | static unsigned int uinput_poll(struct file *file, poll_table *wait) | |
486 | { | |
487 | struct uinput_device *udev = file->private_data; | |
488 | ||
489 | poll_wait(file, &udev->waitq, wait); | |
490 | ||
491 | if (udev->head != udev->tail) | |
492 | return POLLIN | POLLRDNORM; | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
29506415 | 497 | static int uinput_release(struct inode *inode, struct file *file) |
1da177e4 | 498 | { |
29506415 | 499 | struct uinput_device *udev = file->private_data; |
1da177e4 | 500 | |
29506415 | 501 | uinput_destroy_device(udev); |
1da177e4 LT |
502 | kfree(udev); |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
2d56f3a3 PL |
507 | #ifdef CONFIG_COMPAT |
508 | struct uinput_ff_upload_compat { | |
509 | int request_id; | |
510 | int retval; | |
511 | struct ff_effect_compat effect; | |
512 | struct ff_effect_compat old; | |
513 | }; | |
514 | ||
515 | static int uinput_ff_upload_to_user(char __user *buffer, | |
516 | const struct uinput_ff_upload *ff_up) | |
517 | { | |
518 | if (INPUT_COMPAT_TEST) { | |
519 | struct uinput_ff_upload_compat ff_up_compat; | |
520 | ||
521 | ff_up_compat.request_id = ff_up->request_id; | |
522 | ff_up_compat.retval = ff_up->retval; | |
523 | /* | |
524 | * It so happens that the pointer that gives us the trouble | |
525 | * is the last field in the structure. Since we don't support | |
526 | * custom waveforms in uinput anyway we can just copy the whole | |
527 | * thing (to the compat size) and ignore the pointer. | |
528 | */ | |
529 | memcpy(&ff_up_compat.effect, &ff_up->effect, | |
530 | sizeof(struct ff_effect_compat)); | |
531 | memcpy(&ff_up_compat.old, &ff_up->old, | |
532 | sizeof(struct ff_effect_compat)); | |
533 | ||
534 | if (copy_to_user(buffer, &ff_up_compat, | |
535 | sizeof(struct uinput_ff_upload_compat))) | |
536 | return -EFAULT; | |
537 | } else { | |
538 | if (copy_to_user(buffer, ff_up, | |
539 | sizeof(struct uinput_ff_upload))) | |
540 | return -EFAULT; | |
541 | } | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | static int uinput_ff_upload_from_user(const char __user *buffer, | |
547 | struct uinput_ff_upload *ff_up) | |
548 | { | |
549 | if (INPUT_COMPAT_TEST) { | |
550 | struct uinput_ff_upload_compat ff_up_compat; | |
551 | ||
552 | if (copy_from_user(&ff_up_compat, buffer, | |
553 | sizeof(struct uinput_ff_upload_compat))) | |
554 | return -EFAULT; | |
555 | ||
556 | ff_up->request_id = ff_up_compat.request_id; | |
557 | ff_up->retval = ff_up_compat.retval; | |
558 | memcpy(&ff_up->effect, &ff_up_compat.effect, | |
559 | sizeof(struct ff_effect_compat)); | |
560 | memcpy(&ff_up->old, &ff_up_compat.old, | |
561 | sizeof(struct ff_effect_compat)); | |
562 | ||
563 | } else { | |
564 | if (copy_from_user(ff_up, buffer, | |
565 | sizeof(struct uinput_ff_upload))) | |
566 | return -EFAULT; | |
567 | } | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | #else | |
573 | ||
574 | static int uinput_ff_upload_to_user(char __user *buffer, | |
575 | const struct uinput_ff_upload *ff_up) | |
576 | { | |
577 | if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload))) | |
578 | return -EFAULT; | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
583 | static int uinput_ff_upload_from_user(const char __user *buffer, | |
584 | struct uinput_ff_upload *ff_up) | |
585 | { | |
586 | if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload))) | |
587 | return -EFAULT; | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | #endif | |
593 | ||
29506415 DT |
594 | #define uinput_set_bit(_arg, _bit, _max) \ |
595 | ({ \ | |
596 | int __ret = 0; \ | |
597 | if (udev->state == UIST_CREATED) \ | |
598 | __ret = -EINVAL; \ | |
599 | else if ((_arg) > (_max)) \ | |
600 | __ret = -EINVAL; \ | |
601 | else set_bit((_arg), udev->dev->_bit); \ | |
602 | __ret; \ | |
603 | }) | |
604 | ||
2d56f3a3 PL |
605 | static long uinput_ioctl_handler(struct file *file, unsigned int cmd, |
606 | unsigned long arg, void __user *p) | |
1da177e4 | 607 | { |
29506415 | 608 | int retval; |
2d56f3a3 | 609 | struct uinput_device *udev = file->private_data; |
1da177e4 LT |
610 | struct uinput_ff_upload ff_up; |
611 | struct uinput_ff_erase ff_erase; | |
612 | struct uinput_request *req; | |
613 | int length; | |
5b6271bd | 614 | char *phys; |
1da177e4 | 615 | |
221979aa | 616 | retval = mutex_lock_interruptible(&udev->mutex); |
29506415 DT |
617 | if (retval) |
618 | return retval; | |
619 | ||
620 | if (!udev->dev) { | |
621 | retval = uinput_allocate_device(udev); | |
622 | if (retval) | |
623 | goto out; | |
1da177e4 LT |
624 | } |
625 | ||
626 | switch (cmd) { | |
627 | case UI_DEV_CREATE: | |
628 | retval = uinput_create_device(udev); | |
629 | break; | |
630 | ||
631 | case UI_DEV_DESTROY: | |
29506415 | 632 | uinput_destroy_device(udev); |
1da177e4 LT |
633 | break; |
634 | ||
635 | case UI_SET_EVBIT: | |
29506415 | 636 | retval = uinput_set_bit(arg, evbit, EV_MAX); |
1da177e4 LT |
637 | break; |
638 | ||
639 | case UI_SET_KEYBIT: | |
29506415 | 640 | retval = uinput_set_bit(arg, keybit, KEY_MAX); |
1da177e4 LT |
641 | break; |
642 | ||
643 | case UI_SET_RELBIT: | |
29506415 | 644 | retval = uinput_set_bit(arg, relbit, REL_MAX); |
1da177e4 LT |
645 | break; |
646 | ||
647 | case UI_SET_ABSBIT: | |
29506415 | 648 | retval = uinput_set_bit(arg, absbit, ABS_MAX); |
1da177e4 LT |
649 | break; |
650 | ||
651 | case UI_SET_MSCBIT: | |
29506415 | 652 | retval = uinput_set_bit(arg, mscbit, MSC_MAX); |
1da177e4 LT |
653 | break; |
654 | ||
655 | case UI_SET_LEDBIT: | |
29506415 | 656 | retval = uinput_set_bit(arg, ledbit, LED_MAX); |
1da177e4 LT |
657 | break; |
658 | ||
659 | case UI_SET_SNDBIT: | |
29506415 | 660 | retval = uinput_set_bit(arg, sndbit, SND_MAX); |
1da177e4 LT |
661 | break; |
662 | ||
663 | case UI_SET_FFBIT: | |
29506415 | 664 | retval = uinput_set_bit(arg, ffbit, FF_MAX); |
1da177e4 LT |
665 | break; |
666 | ||
59c7c037 DT |
667 | case UI_SET_SWBIT: |
668 | retval = uinput_set_bit(arg, swbit, SW_MAX); | |
669 | break; | |
670 | ||
1da177e4 | 671 | case UI_SET_PHYS: |
29506415 DT |
672 | if (udev->state == UIST_CREATED) { |
673 | retval = -EINVAL; | |
674 | goto out; | |
675 | } | |
1da177e4 LT |
676 | length = strnlen_user(p, 1024); |
677 | if (length <= 0) { | |
678 | retval = -EFAULT; | |
679 | break; | |
680 | } | |
5b6271bd DT |
681 | kfree(udev->dev->phys); |
682 | udev->dev->phys = phys = kmalloc(length, GFP_KERNEL); | |
683 | if (!phys) { | |
1da177e4 LT |
684 | retval = -ENOMEM; |
685 | break; | |
686 | } | |
5b6271bd | 687 | if (copy_from_user(phys, p, length)) { |
1da177e4 | 688 | udev->dev->phys = NULL; |
5b6271bd DT |
689 | kfree(phys); |
690 | retval = -EFAULT; | |
1da177e4 LT |
691 | break; |
692 | } | |
5b6271bd | 693 | phys[length - 1] = '\0'; |
1da177e4 LT |
694 | break; |
695 | ||
696 | case UI_BEGIN_FF_UPLOAD: | |
2d56f3a3 PL |
697 | retval = uinput_ff_upload_from_user(p, &ff_up); |
698 | if (retval) | |
1da177e4 | 699 | break; |
2d56f3a3 | 700 | |
1da177e4 | 701 | req = uinput_request_find(udev, ff_up.request_id); |
2d56f3a3 | 702 | if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) { |
1da177e4 LT |
703 | retval = -EINVAL; |
704 | break; | |
705 | } | |
2d56f3a3 | 706 | |
1da177e4 | 707 | ff_up.retval = 0; |
2d56f3a3 | 708 | ff_up.effect = *req->u.upload.effect; |
ff462551 | 709 | if (req->u.upload.old) |
2d56f3a3 | 710 | ff_up.old = *req->u.upload.old; |
ff462551 AH |
711 | else |
712 | memset(&ff_up.old, 0, sizeof(struct ff_effect)); | |
713 | ||
2d56f3a3 | 714 | retval = uinput_ff_upload_to_user(p, &ff_up); |
1da177e4 LT |
715 | break; |
716 | ||
717 | case UI_BEGIN_FF_ERASE: | |
718 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { | |
719 | retval = -EFAULT; | |
720 | break; | |
721 | } | |
2d56f3a3 | 722 | |
1da177e4 | 723 | req = uinput_request_find(udev, ff_erase.request_id); |
2d56f3a3 | 724 | if (!req || req->code != UI_FF_ERASE) { |
1da177e4 LT |
725 | retval = -EINVAL; |
726 | break; | |
727 | } | |
2d56f3a3 | 728 | |
1da177e4 LT |
729 | ff_erase.retval = 0; |
730 | ff_erase.effect_id = req->u.effect_id; | |
731 | if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) { | |
732 | retval = -EFAULT; | |
733 | break; | |
734 | } | |
2d56f3a3 | 735 | |
1da177e4 LT |
736 | break; |
737 | ||
738 | case UI_END_FF_UPLOAD: | |
2d56f3a3 PL |
739 | retval = uinput_ff_upload_from_user(p, &ff_up); |
740 | if (retval) | |
1da177e4 | 741 | break; |
2d56f3a3 | 742 | |
1da177e4 | 743 | req = uinput_request_find(udev, ff_up.request_id); |
2d56f3a3 PL |
744 | if (!req || req->code != UI_FF_UPLOAD || |
745 | !req->u.upload.effect) { | |
1da177e4 LT |
746 | retval = -EINVAL; |
747 | break; | |
748 | } | |
2d56f3a3 | 749 | |
1da177e4 | 750 | req->retval = ff_up.retval; |
0048e603 | 751 | uinput_request_done(udev, req); |
1da177e4 LT |
752 | break; |
753 | ||
754 | case UI_END_FF_ERASE: | |
755 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { | |
756 | retval = -EFAULT; | |
757 | break; | |
758 | } | |
2d56f3a3 | 759 | |
1da177e4 | 760 | req = uinput_request_find(udev, ff_erase.request_id); |
2d56f3a3 | 761 | if (!req || req->code != UI_FF_ERASE) { |
1da177e4 LT |
762 | retval = -EINVAL; |
763 | break; | |
764 | } | |
2d56f3a3 | 765 | |
1da177e4 | 766 | req->retval = ff_erase.retval; |
0048e603 | 767 | uinput_request_done(udev, req); |
1da177e4 LT |
768 | break; |
769 | ||
770 | default: | |
771 | retval = -EINVAL; | |
772 | } | |
29506415 DT |
773 | |
774 | out: | |
221979aa | 775 | mutex_unlock(&udev->mutex); |
1da177e4 LT |
776 | return retval; |
777 | } | |
778 | ||
2d56f3a3 PL |
779 | static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
780 | { | |
781 | return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg); | |
782 | } | |
783 | ||
784 | #ifdef CONFIG_COMPAT | |
785 | static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
786 | { | |
787 | return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg)); | |
788 | } | |
789 | #endif | |
790 | ||
2b8693c0 | 791 | static const struct file_operations uinput_fops = { |
29506415 DT |
792 | .owner = THIS_MODULE, |
793 | .open = uinput_open, | |
794 | .release = uinput_release, | |
795 | .read = uinput_read, | |
796 | .write = uinput_write, | |
797 | .poll = uinput_poll, | |
798 | .unlocked_ioctl = uinput_ioctl, | |
2d56f3a3 PL |
799 | #ifdef CONFIG_COMPAT |
800 | .compat_ioctl = uinput_compat_ioctl, | |
801 | #endif | |
1da177e4 LT |
802 | }; |
803 | ||
804 | static struct miscdevice uinput_misc = { | |
29506415 DT |
805 | .fops = &uinput_fops, |
806 | .minor = UINPUT_MINOR, | |
807 | .name = UINPUT_NAME, | |
1da177e4 LT |
808 | }; |
809 | ||
810 | static int __init uinput_init(void) | |
811 | { | |
812 | return misc_register(&uinput_misc); | |
813 | } | |
814 | ||
815 | static void __exit uinput_exit(void) | |
816 | { | |
817 | misc_deregister(&uinput_misc); | |
818 | } | |
819 | ||
820 | MODULE_AUTHOR("Aristeu Sergio Rozanski Filho"); | |
821 | MODULE_DESCRIPTION("User level driver support for input subsystem"); | |
822 | MODULE_LICENSE("GPL"); | |
ff462551 | 823 | MODULE_VERSION("0.3"); |
1da177e4 LT |
824 | |
825 | module_init(uinput_init); | |
826 | module_exit(uinput_exit); | |
827 |