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: | |
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> | |
47c78e89 | 40 | #include <linux/input/mt.h> |
2d56f3a3 | 41 | #include "../input-compat.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
44 | { | |
373f9713 | 45 | struct uinput_device *udev = input_get_drvdata(dev); |
1da177e4 LT |
46 | |
47 | udev->buff[udev->head].type = type; | |
48 | udev->buff[udev->head].code = code; | |
49 | udev->buff[udev->head].value = value; | |
50 | do_gettimeofday(&udev->buff[udev->head].time); | |
51 | udev->head = (udev->head + 1) % UINPUT_BUFFER_SIZE; | |
52 | ||
53 | wake_up_interruptible(&udev->waitq); | |
54 | ||
55 | return 0; | |
56 | } | |
57 | ||
05cebd38 | 58 | /* Atomically allocate an ID for the given request. Returns 0 on success. */ |
00ce756c DT |
59 | static bool uinput_request_alloc_id(struct uinput_device *udev, |
60 | struct uinput_request *request) | |
1da177e4 | 61 | { |
c5b3533a | 62 | unsigned int id; |
00ce756c | 63 | bool reserved = false; |
1da177e4 | 64 | |
0048e603 | 65 | spin_lock(&udev->requests_lock); |
152c12f5 | 66 | |
05cebd38 | 67 | for (id = 0; id < UINPUT_NUM_REQUESTS; id++) { |
1da177e4 | 68 | if (!udev->requests[id]) { |
1da177e4 | 69 | request->id = id; |
0048e603 | 70 | udev->requests[id] = request; |
00ce756c | 71 | reserved = true; |
152c12f5 | 72 | break; |
1da177e4 | 73 | } |
05cebd38 | 74 | } |
152c12f5 | 75 | |
0048e603 | 76 | spin_unlock(&udev->requests_lock); |
00ce756c | 77 | return reserved; |
1da177e4 LT |
78 | } |
79 | ||
c5b3533a DT |
80 | static struct uinput_request *uinput_request_find(struct uinput_device *udev, |
81 | unsigned int id) | |
1da177e4 LT |
82 | { |
83 | /* Find an input request, by ID. Returns NULL if the ID isn't valid. */ | |
c5b3533a | 84 | if (id >= UINPUT_NUM_REQUESTS) |
1da177e4 | 85 | return NULL; |
2d56f3a3 | 86 | |
1da177e4 LT |
87 | return udev->requests[id]; |
88 | } | |
89 | ||
00ce756c DT |
90 | static int uinput_request_reserve_slot(struct uinput_device *udev, |
91 | struct uinput_request *request) | |
1da177e4 | 92 | { |
0048e603 DT |
93 | /* Allocate slot. If none are available right away, wait. */ |
94 | return wait_event_interruptible(udev->requests_waitq, | |
00ce756c | 95 | uinput_request_alloc_id(udev, request)); |
0048e603 | 96 | } |
1da177e4 | 97 | |
0048e603 DT |
98 | static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request) |
99 | { | |
0048e603 DT |
100 | /* Mark slot as available */ |
101 | udev->requests[request->id] = NULL; | |
e597f0c8 | 102 | wake_up(&udev->requests_waitq); |
e7507ed9 DT |
103 | |
104 | complete(&request->done); | |
1da177e4 LT |
105 | } |
106 | ||
00ce756c DT |
107 | static int uinput_request_send(struct uinput_device *udev, |
108 | struct uinput_request *request) | |
1da177e4 | 109 | { |
05cebd38 ASRF |
110 | int retval; |
111 | ||
05cebd38 ASRF |
112 | retval = mutex_lock_interruptible(&udev->mutex); |
113 | if (retval) | |
114 | return retval; | |
115 | ||
116 | if (udev->state != UIST_CREATED) { | |
117 | retval = -ENODEV; | |
118 | goto out; | |
119 | } | |
120 | ||
00ce756c DT |
121 | init_completion(&request->done); |
122 | ||
123 | /* | |
124 | * Tell our userspace application about this new request | |
125 | * by queueing an input event. | |
126 | */ | |
05cebd38 ASRF |
127 | uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id); |
128 | ||
129 | out: | |
130 | mutex_unlock(&udev->mutex); | |
131 | return retval; | |
132 | } | |
133 | ||
00ce756c DT |
134 | static int uinput_request_submit(struct uinput_device *udev, |
135 | struct uinput_request *request) | |
136 | { | |
137 | int error; | |
138 | ||
139 | error = uinput_request_reserve_slot(udev, request); | |
140 | if (error) | |
141 | return error; | |
142 | ||
143 | error = uinput_request_send(udev, request); | |
144 | if (error) { | |
145 | uinput_request_done(udev, request); | |
146 | return error; | |
147 | } | |
148 | ||
149 | wait_for_completion(&request->done); | |
150 | return request->retval; | |
151 | } | |
152 | ||
05cebd38 ASRF |
153 | /* |
154 | * Fail all ouitstanding requests so handlers don't wait for the userspace | |
155 | * to finish processing them. | |
156 | */ | |
157 | static void uinput_flush_requests(struct uinput_device *udev) | |
158 | { | |
159 | struct uinput_request *request; | |
160 | int i; | |
1da177e4 | 161 | |
05cebd38 ASRF |
162 | spin_lock(&udev->requests_lock); |
163 | ||
164 | for (i = 0; i < UINPUT_NUM_REQUESTS; i++) { | |
165 | request = udev->requests[i]; | |
166 | if (request) { | |
167 | request->retval = -ENODEV; | |
168 | uinput_request_done(udev, request); | |
169 | } | |
170 | } | |
171 | ||
172 | spin_unlock(&udev->requests_lock); | |
1da177e4 LT |
173 | } |
174 | ||
ff462551 AH |
175 | static void uinput_dev_set_gain(struct input_dev *dev, u16 gain) |
176 | { | |
177 | uinput_dev_event(dev, EV_FF, FF_GAIN, gain); | |
178 | } | |
179 | ||
180 | static void uinput_dev_set_autocenter(struct input_dev *dev, u16 magnitude) | |
181 | { | |
182 | uinput_dev_event(dev, EV_FF, FF_AUTOCENTER, magnitude); | |
183 | } | |
184 | ||
185 | static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value) | |
186 | { | |
187 | return uinput_dev_event(dev, EV_FF, effect_id, value); | |
188 | } | |
189 | ||
190 | static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old) | |
1da177e4 | 191 | { |
05cebd38 | 192 | struct uinput_device *udev = input_get_drvdata(dev); |
1da177e4 LT |
193 | struct uinput_request request; |
194 | ||
2d56f3a3 PL |
195 | /* |
196 | * uinput driver does not currently support periodic effects with | |
197 | * custom waveform since it does not have a way to pass buffer of | |
198 | * samples (custom_data) to userspace. If ever there is a device | |
199 | * supporting custom waveforms we would need to define an additional | |
200 | * ioctl (UI_UPLOAD_SAMPLES) but for now we just bail out. | |
201 | */ | |
202 | if (effect->type == FF_PERIODIC && | |
203 | effect->u.periodic.waveform == FF_CUSTOM) | |
204 | return -EINVAL; | |
205 | ||
0048e603 | 206 | request.code = UI_FF_UPLOAD; |
ff462551 AH |
207 | request.u.upload.effect = effect; |
208 | request.u.upload.old = old; | |
0048e603 | 209 | |
00ce756c | 210 | return uinput_request_submit(udev, &request); |
1da177e4 LT |
211 | } |
212 | ||
213 | static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id) | |
214 | { | |
05cebd38 | 215 | struct uinput_device *udev = input_get_drvdata(dev); |
1da177e4 LT |
216 | struct uinput_request request; |
217 | ||
218 | if (!test_bit(EV_FF, dev->evbit)) | |
219 | return -ENOSYS; | |
220 | ||
0048e603 | 221 | request.code = UI_FF_ERASE; |
1da177e4 | 222 | request.u.effect_id = effect_id; |
0048e603 | 223 | |
00ce756c | 224 | return uinput_request_submit(udev, &request); |
1da177e4 LT |
225 | } |
226 | ||
29506415 | 227 | static void uinput_destroy_device(struct uinput_device *udev) |
1da177e4 | 228 | { |
29506415 | 229 | const char *name, *phys; |
05cebd38 ASRF |
230 | struct input_dev *dev = udev->dev; |
231 | enum uinput_state old_state = udev->state; | |
232 | ||
233 | udev->state = UIST_NEW_DEVICE; | |
29506415 | 234 | |
05cebd38 ASRF |
235 | if (dev) { |
236 | name = dev->name; | |
237 | phys = dev->phys; | |
238 | if (old_state == UIST_CREATED) { | |
239 | uinput_flush_requests(udev); | |
240 | input_unregister_device(dev); | |
241 | } else { | |
242 | input_free_device(dev); | |
243 | } | |
29506415 DT |
244 | kfree(name); |
245 | kfree(phys); | |
246 | udev->dev = NULL; | |
1da177e4 | 247 | } |
1da177e4 LT |
248 | } |
249 | ||
29506415 | 250 | static int uinput_create_device(struct uinput_device *udev) |
1da177e4 | 251 | { |
ff462551 | 252 | struct input_dev *dev = udev->dev; |
29506415 DT |
253 | int error; |
254 | ||
255 | if (udev->state != UIST_SETUP_COMPLETE) { | |
256 | printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME); | |
1da177e4 LT |
257 | return -EINVAL; |
258 | } | |
259 | ||
ff462551 AH |
260 | if (udev->ff_effects_max) { |
261 | error = input_ff_create(dev, udev->ff_effects_max); | |
262 | if (error) | |
263 | goto fail1; | |
264 | ||
265 | dev->ff->upload = uinput_dev_upload_effect; | |
266 | dev->ff->erase = uinput_dev_erase_effect; | |
267 | dev->ff->playback = uinput_dev_playback; | |
268 | dev->ff->set_gain = uinput_dev_set_gain; | |
269 | dev->ff->set_autocenter = uinput_dev_set_autocenter; | |
29506415 | 270 | } |
1da177e4 | 271 | |
ff462551 AH |
272 | error = input_register_device(udev->dev); |
273 | if (error) | |
274 | goto fail2; | |
275 | ||
29506415 | 276 | udev->state = UIST_CREATED; |
1da177e4 LT |
277 | |
278 | return 0; | |
ff462551 AH |
279 | |
280 | fail2: input_ff_destroy(dev); | |
281 | fail1: uinput_destroy_device(udev); | |
282 | return error; | |
1da177e4 LT |
283 | } |
284 | ||
285 | static int uinput_open(struct inode *inode, struct file *file) | |
286 | { | |
29506415 | 287 | struct uinput_device *newdev; |
1da177e4 | 288 | |
29506415 | 289 | newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL); |
1da177e4 | 290 | if (!newdev) |
29506415 DT |
291 | return -ENOMEM; |
292 | ||
221979aa | 293 | mutex_init(&newdev->mutex); |
0048e603 | 294 | spin_lock_init(&newdev->requests_lock); |
1da177e4 | 295 | init_waitqueue_head(&newdev->requests_waitq); |
29506415 DT |
296 | init_waitqueue_head(&newdev->waitq); |
297 | newdev->state = UIST_NEW_DEVICE; | |
1da177e4 LT |
298 | |
299 | file->private_data = newdev; | |
daf8a96b | 300 | nonseekable_open(inode, file); |
1da177e4 LT |
301 | |
302 | return 0; | |
1da177e4 LT |
303 | } |
304 | ||
305 | static int uinput_validate_absbits(struct input_dev *dev) | |
306 | { | |
307 | unsigned int cnt; | |
308 | int retval = 0; | |
309 | ||
81c2a3ba | 310 | for (cnt = 0; cnt < ABS_CNT; cnt++) { |
a718d79c | 311 | int min, max; |
1da177e4 LT |
312 | if (!test_bit(cnt, dev->absbit)) |
313 | continue; | |
314 | ||
a718d79c PH |
315 | min = input_abs_get_min(dev, cnt); |
316 | max = input_abs_get_max(dev, cnt); | |
317 | ||
318 | if ((min != 0 || max != 0) && max <= min) { | |
1da177e4 LT |
319 | printk(KERN_DEBUG |
320 | "%s: invalid abs[%02x] min:%d max:%d\n", | |
321 | UINPUT_NAME, cnt, | |
987a6c02 DM |
322 | input_abs_get_min(dev, cnt), |
323 | input_abs_get_max(dev, cnt)); | |
1da177e4 LT |
324 | retval = -EINVAL; |
325 | break; | |
326 | } | |
327 | ||
987a6c02 DM |
328 | if (input_abs_get_flat(dev, cnt) > |
329 | input_abs_get_max(dev, cnt) - input_abs_get_min(dev, cnt)) { | |
1da177e4 | 330 | printk(KERN_DEBUG |
987a6c02 | 331 | "%s: abs_flat #%02x out of range: %d " |
1da177e4 | 332 | "(min:%d/max:%d)\n", |
987a6c02 DM |
333 | UINPUT_NAME, cnt, |
334 | input_abs_get_flat(dev, cnt), | |
335 | input_abs_get_min(dev, cnt), | |
336 | input_abs_get_max(dev, cnt)); | |
1da177e4 LT |
337 | retval = -EINVAL; |
338 | break; | |
339 | } | |
340 | } | |
341 | return retval; | |
342 | } | |
343 | ||
29506415 DT |
344 | static int uinput_allocate_device(struct uinput_device *udev) |
345 | { | |
346 | udev->dev = input_allocate_device(); | |
347 | if (!udev->dev) | |
348 | return -ENOMEM; | |
349 | ||
350 | udev->dev->event = uinput_dev_event; | |
373f9713 | 351 | input_set_drvdata(udev->dev, udev); |
29506415 DT |
352 | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) | |
1da177e4 LT |
357 | { |
358 | struct uinput_user_dev *user_dev; | |
359 | struct input_dev *dev; | |
5d9d6e91 | 360 | int i; |
152c12f5 | 361 | int retval; |
1da177e4 | 362 | |
29506415 DT |
363 | if (count != sizeof(struct uinput_user_dev)) |
364 | return -EINVAL; | |
365 | ||
366 | if (!udev->dev) { | |
367 | retval = uinput_allocate_device(udev); | |
368 | if (retval) | |
369 | return retval; | |
370 | } | |
1da177e4 | 371 | |
1da177e4 LT |
372 | dev = udev->dev; |
373 | ||
4dfcc271 | 374 | user_dev = memdup_user(buffer, sizeof(struct uinput_user_dev)); |
163d2770 | 375 | if (IS_ERR(user_dev)) |
4dfcc271 | 376 | return PTR_ERR(user_dev); |
1da177e4 | 377 | |
ff462551 AH |
378 | udev->ff_effects_max = user_dev->ff_effects_max; |
379 | ||
5d9d6e91 DH |
380 | /* Ensure name is filled in */ |
381 | if (!user_dev->name[0]) { | |
29506415 DT |
382 | retval = -EINVAL; |
383 | goto exit; | |
384 | } | |
385 | ||
386 | kfree(dev->name); | |
5d9d6e91 DH |
387 | dev->name = kstrndup(user_dev->name, UINPUT_MAX_NAME_SIZE, |
388 | GFP_KERNEL); | |
389 | if (!dev->name) { | |
1da177e4 LT |
390 | retval = -ENOMEM; |
391 | goto exit; | |
392 | } | |
393 | ||
1da177e4 LT |
394 | dev->id.bustype = user_dev->id.bustype; |
395 | dev->id.vendor = user_dev->id.vendor; | |
396 | dev->id.product = user_dev->id.product; | |
397 | dev->id.version = user_dev->id.version; | |
1da177e4 | 398 | |
987a6c02 DM |
399 | for (i = 0; i < ABS_CNT; i++) { |
400 | input_abs_set_max(dev, i, user_dev->absmax[i]); | |
401 | input_abs_set_min(dev, i, user_dev->absmin[i]); | |
402 | input_abs_set_fuzz(dev, i, user_dev->absfuzz[i]); | |
403 | input_abs_set_flat(dev, i, user_dev->absflat[i]); | |
404 | } | |
1da177e4 LT |
405 | |
406 | /* check if absmin/absmax/absfuzz/absflat are filled as | |
407 | * told in Documentation/input/input-programming.txt */ | |
408 | if (test_bit(EV_ABS, dev->evbit)) { | |
29506415 DT |
409 | retval = uinput_validate_absbits(dev); |
410 | if (retval < 0) | |
411 | goto exit; | |
38e7afe9 HR |
412 | if (test_bit(ABS_MT_SLOT, dev->absbit)) { |
413 | int nslot = input_abs_get_max(dev, ABS_MT_SLOT) + 1; | |
8cde8100 | 414 | input_mt_init_slots(dev, nslot); |
38e7afe9 HR |
415 | } else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) { |
416 | input_set_events_per_packet(dev, 60); | |
417 | } | |
1da177e4 LT |
418 | } |
419 | ||
29506415 DT |
420 | udev->state = UIST_SETUP_COMPLETE; |
421 | retval = count; | |
422 | ||
423 | exit: | |
1da177e4 LT |
424 | kfree(user_dev); |
425 | return retval; | |
426 | } | |
427 | ||
29506415 DT |
428 | static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) |
429 | { | |
430 | struct input_event ev; | |
431 | ||
2d56f3a3 | 432 | if (count < input_event_size()) |
29506415 DT |
433 | return -EINVAL; |
434 | ||
2d56f3a3 | 435 | if (input_event_from_user(buffer, &ev)) |
29506415 DT |
436 | return -EFAULT; |
437 | ||
438 | input_event(udev->dev, ev.type, ev.code, ev.value); | |
439 | ||
2d56f3a3 | 440 | return input_event_size(); |
29506415 DT |
441 | } |
442 | ||
1da177e4 LT |
443 | static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
444 | { | |
445 | struct uinput_device *udev = file->private_data; | |
29506415 | 446 | int retval; |
1da177e4 | 447 | |
22ae19c6 DT |
448 | if (count == 0) |
449 | return 0; | |
450 | ||
221979aa | 451 | retval = mutex_lock_interruptible(&udev->mutex); |
29506415 DT |
452 | if (retval) |
453 | return retval; | |
454 | ||
455 | retval = udev->state == UIST_CREATED ? | |
456 | uinput_inject_event(udev, buffer, count) : | |
457 | uinput_setup_device(udev, buffer, count); | |
1da177e4 | 458 | |
221979aa | 459 | mutex_unlock(&udev->mutex); |
1da177e4 | 460 | |
29506415 | 461 | return retval; |
1da177e4 LT |
462 | } |
463 | ||
929d1af5 DT |
464 | static bool uinput_fetch_next_event(struct uinput_device *udev, |
465 | struct input_event *event) | |
466 | { | |
467 | bool have_event; | |
468 | ||
469 | spin_lock_irq(&udev->dev->event_lock); | |
470 | ||
471 | have_event = udev->head != udev->tail; | |
472 | if (have_event) { | |
473 | *event = udev->buff[udev->tail]; | |
474 | udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; | |
475 | } | |
476 | ||
477 | spin_unlock_irq(&udev->dev->event_lock); | |
478 | ||
479 | return have_event; | |
480 | } | |
481 | ||
22ae19c6 DT |
482 | static ssize_t uinput_events_to_user(struct uinput_device *udev, |
483 | char __user *buffer, size_t count) | |
1da177e4 | 484 | { |
929d1af5 | 485 | struct input_event event; |
22ae19c6 | 486 | size_t read = 0; |
1da177e4 | 487 | |
22ae19c6 DT |
488 | while (read + input_event_size() <= count && |
489 | uinput_fetch_next_event(udev, &event)) { | |
f40033ac | 490 | |
00ce756c DT |
491 | if (input_event_to_user(buffer + read, &event)) |
492 | return -EFAULT; | |
1da177e4 | 493 | |
22ae19c6 DT |
494 | read += input_event_size(); |
495 | } | |
1da177e4 | 496 | |
00ce756c | 497 | return read; |
22ae19c6 | 498 | } |
1da177e4 | 499 | |
22ae19c6 DT |
500 | static ssize_t uinput_read(struct file *file, char __user *buffer, |
501 | size_t count, loff_t *ppos) | |
502 | { | |
503 | struct uinput_device *udev = file->private_data; | |
504 | ssize_t retval; | |
29506415 | 505 | |
22ae19c6 DT |
506 | if (count != 0 && count < input_event_size()) |
507 | return -EINVAL; | |
1da177e4 | 508 | |
22ae19c6 DT |
509 | do { |
510 | retval = mutex_lock_interruptible(&udev->mutex); | |
511 | if (retval) | |
512 | return retval; | |
929d1af5 | 513 | |
22ae19c6 DT |
514 | if (udev->state != UIST_CREATED) |
515 | retval = -ENODEV; | |
516 | else if (udev->head == udev->tail && | |
517 | (file->f_flags & O_NONBLOCK)) | |
518 | retval = -EAGAIN; | |
519 | else | |
520 | retval = uinput_events_to_user(udev, buffer, count); | |
929d1af5 | 521 | |
22ae19c6 | 522 | mutex_unlock(&udev->mutex); |
1da177e4 | 523 | |
22ae19c6 DT |
524 | if (retval || count == 0) |
525 | break; | |
526 | ||
527 | if (!(file->f_flags & O_NONBLOCK)) | |
528 | retval = wait_event_interruptible(udev->waitq, | |
529 | udev->head != udev->tail || | |
530 | udev->state != UIST_CREATED); | |
531 | } while (retval == 0); | |
29506415 | 532 | |
1da177e4 LT |
533 | return retval; |
534 | } | |
535 | ||
536 | static unsigned int uinput_poll(struct file *file, poll_table *wait) | |
537 | { | |
538 | struct uinput_device *udev = file->private_data; | |
539 | ||
540 | poll_wait(file, &udev->waitq, wait); | |
541 | ||
542 | if (udev->head != udev->tail) | |
543 | return POLLIN | POLLRDNORM; | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
29506415 | 548 | static int uinput_release(struct inode *inode, struct file *file) |
1da177e4 | 549 | { |
29506415 | 550 | struct uinput_device *udev = file->private_data; |
1da177e4 | 551 | |
29506415 | 552 | uinput_destroy_device(udev); |
1da177e4 LT |
553 | kfree(udev); |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
2d56f3a3 PL |
558 | #ifdef CONFIG_COMPAT |
559 | struct uinput_ff_upload_compat { | |
c5b3533a DT |
560 | __u32 request_id; |
561 | __s32 retval; | |
2d56f3a3 PL |
562 | struct ff_effect_compat effect; |
563 | struct ff_effect_compat old; | |
564 | }; | |
565 | ||
566 | static int uinput_ff_upload_to_user(char __user *buffer, | |
567 | const struct uinput_ff_upload *ff_up) | |
568 | { | |
569 | if (INPUT_COMPAT_TEST) { | |
570 | struct uinput_ff_upload_compat ff_up_compat; | |
571 | ||
572 | ff_up_compat.request_id = ff_up->request_id; | |
573 | ff_up_compat.retval = ff_up->retval; | |
574 | /* | |
575 | * It so happens that the pointer that gives us the trouble | |
576 | * is the last field in the structure. Since we don't support | |
577 | * custom waveforms in uinput anyway we can just copy the whole | |
578 | * thing (to the compat size) and ignore the pointer. | |
579 | */ | |
580 | memcpy(&ff_up_compat.effect, &ff_up->effect, | |
581 | sizeof(struct ff_effect_compat)); | |
582 | memcpy(&ff_up_compat.old, &ff_up->old, | |
583 | sizeof(struct ff_effect_compat)); | |
584 | ||
585 | if (copy_to_user(buffer, &ff_up_compat, | |
586 | sizeof(struct uinput_ff_upload_compat))) | |
587 | return -EFAULT; | |
588 | } else { | |
589 | if (copy_to_user(buffer, ff_up, | |
590 | sizeof(struct uinput_ff_upload))) | |
591 | return -EFAULT; | |
592 | } | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | static int uinput_ff_upload_from_user(const char __user *buffer, | |
598 | struct uinput_ff_upload *ff_up) | |
599 | { | |
600 | if (INPUT_COMPAT_TEST) { | |
601 | struct uinput_ff_upload_compat ff_up_compat; | |
602 | ||
603 | if (copy_from_user(&ff_up_compat, buffer, | |
604 | sizeof(struct uinput_ff_upload_compat))) | |
605 | return -EFAULT; | |
606 | ||
607 | ff_up->request_id = ff_up_compat.request_id; | |
608 | ff_up->retval = ff_up_compat.retval; | |
609 | memcpy(&ff_up->effect, &ff_up_compat.effect, | |
610 | sizeof(struct ff_effect_compat)); | |
611 | memcpy(&ff_up->old, &ff_up_compat.old, | |
612 | sizeof(struct ff_effect_compat)); | |
613 | ||
614 | } else { | |
615 | if (copy_from_user(ff_up, buffer, | |
616 | sizeof(struct uinput_ff_upload))) | |
617 | return -EFAULT; | |
618 | } | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | #else | |
624 | ||
625 | static int uinput_ff_upload_to_user(char __user *buffer, | |
626 | const struct uinput_ff_upload *ff_up) | |
627 | { | |
628 | if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload))) | |
629 | return -EFAULT; | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
634 | static int uinput_ff_upload_from_user(const char __user *buffer, | |
635 | struct uinput_ff_upload *ff_up) | |
636 | { | |
637 | if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload))) | |
638 | return -EFAULT; | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
643 | #endif | |
644 | ||
29506415 DT |
645 | #define uinput_set_bit(_arg, _bit, _max) \ |
646 | ({ \ | |
647 | int __ret = 0; \ | |
648 | if (udev->state == UIST_CREATED) \ | |
649 | __ret = -EINVAL; \ | |
650 | else if ((_arg) > (_max)) \ | |
651 | __ret = -EINVAL; \ | |
652 | else set_bit((_arg), udev->dev->_bit); \ | |
653 | __ret; \ | |
654 | }) | |
655 | ||
2d56f3a3 PL |
656 | static long uinput_ioctl_handler(struct file *file, unsigned int cmd, |
657 | unsigned long arg, void __user *p) | |
1da177e4 | 658 | { |
29506415 | 659 | int retval; |
2d56f3a3 | 660 | struct uinput_device *udev = file->private_data; |
1da177e4 LT |
661 | struct uinput_ff_upload ff_up; |
662 | struct uinput_ff_erase ff_erase; | |
663 | struct uinput_request *req; | |
5b6271bd | 664 | char *phys; |
1da177e4 | 665 | |
221979aa | 666 | retval = mutex_lock_interruptible(&udev->mutex); |
29506415 DT |
667 | if (retval) |
668 | return retval; | |
669 | ||
670 | if (!udev->dev) { | |
671 | retval = uinput_allocate_device(udev); | |
672 | if (retval) | |
673 | goto out; | |
1da177e4 LT |
674 | } |
675 | ||
676 | switch (cmd) { | |
677 | case UI_DEV_CREATE: | |
678 | retval = uinput_create_device(udev); | |
679 | break; | |
680 | ||
681 | case UI_DEV_DESTROY: | |
29506415 | 682 | uinput_destroy_device(udev); |
1da177e4 LT |
683 | break; |
684 | ||
685 | case UI_SET_EVBIT: | |
29506415 | 686 | retval = uinput_set_bit(arg, evbit, EV_MAX); |
1da177e4 LT |
687 | break; |
688 | ||
689 | case UI_SET_KEYBIT: | |
29506415 | 690 | retval = uinput_set_bit(arg, keybit, KEY_MAX); |
1da177e4 LT |
691 | break; |
692 | ||
693 | case UI_SET_RELBIT: | |
29506415 | 694 | retval = uinput_set_bit(arg, relbit, REL_MAX); |
1da177e4 LT |
695 | break; |
696 | ||
697 | case UI_SET_ABSBIT: | |
29506415 | 698 | retval = uinput_set_bit(arg, absbit, ABS_MAX); |
1da177e4 LT |
699 | break; |
700 | ||
701 | case UI_SET_MSCBIT: | |
29506415 | 702 | retval = uinput_set_bit(arg, mscbit, MSC_MAX); |
1da177e4 LT |
703 | break; |
704 | ||
705 | case UI_SET_LEDBIT: | |
29506415 | 706 | retval = uinput_set_bit(arg, ledbit, LED_MAX); |
1da177e4 LT |
707 | break; |
708 | ||
709 | case UI_SET_SNDBIT: | |
29506415 | 710 | retval = uinput_set_bit(arg, sndbit, SND_MAX); |
1da177e4 LT |
711 | break; |
712 | ||
713 | case UI_SET_FFBIT: | |
29506415 | 714 | retval = uinput_set_bit(arg, ffbit, FF_MAX); |
1da177e4 LT |
715 | break; |
716 | ||
59c7c037 DT |
717 | case UI_SET_SWBIT: |
718 | retval = uinput_set_bit(arg, swbit, SW_MAX); | |
719 | break; | |
720 | ||
85b77200 HR |
721 | case UI_SET_PROPBIT: |
722 | retval = uinput_set_bit(arg, propbit, INPUT_PROP_MAX); | |
723 | break; | |
724 | ||
1da177e4 | 725 | case UI_SET_PHYS: |
29506415 DT |
726 | if (udev->state == UIST_CREATED) { |
727 | retval = -EINVAL; | |
728 | goto out; | |
729 | } | |
4dfcc271 DT |
730 | |
731 | phys = strndup_user(p, 1024); | |
732 | if (IS_ERR(phys)) { | |
733 | retval = PTR_ERR(phys); | |
734 | goto out; | |
1da177e4 | 735 | } |
4dfcc271 | 736 | |
5b6271bd | 737 | kfree(udev->dev->phys); |
4dfcc271 | 738 | udev->dev->phys = phys; |
1da177e4 LT |
739 | break; |
740 | ||
741 | case UI_BEGIN_FF_UPLOAD: | |
2d56f3a3 PL |
742 | retval = uinput_ff_upload_from_user(p, &ff_up); |
743 | if (retval) | |
1da177e4 | 744 | break; |
2d56f3a3 | 745 | |
1da177e4 | 746 | req = uinput_request_find(udev, ff_up.request_id); |
2d56f3a3 | 747 | if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) { |
1da177e4 LT |
748 | retval = -EINVAL; |
749 | break; | |
750 | } | |
2d56f3a3 | 751 | |
1da177e4 | 752 | ff_up.retval = 0; |
2d56f3a3 | 753 | ff_up.effect = *req->u.upload.effect; |
ff462551 | 754 | if (req->u.upload.old) |
2d56f3a3 | 755 | ff_up.old = *req->u.upload.old; |
ff462551 AH |
756 | else |
757 | memset(&ff_up.old, 0, sizeof(struct ff_effect)); | |
758 | ||
2d56f3a3 | 759 | retval = uinput_ff_upload_to_user(p, &ff_up); |
1da177e4 LT |
760 | break; |
761 | ||
762 | case UI_BEGIN_FF_ERASE: | |
763 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { | |
764 | retval = -EFAULT; | |
765 | break; | |
766 | } | |
2d56f3a3 | 767 | |
1da177e4 | 768 | req = uinput_request_find(udev, ff_erase.request_id); |
2d56f3a3 | 769 | if (!req || req->code != UI_FF_ERASE) { |
1da177e4 LT |
770 | retval = -EINVAL; |
771 | break; | |
772 | } | |
2d56f3a3 | 773 | |
1da177e4 LT |
774 | ff_erase.retval = 0; |
775 | ff_erase.effect_id = req->u.effect_id; | |
776 | if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) { | |
777 | retval = -EFAULT; | |
778 | break; | |
779 | } | |
2d56f3a3 | 780 | |
1da177e4 LT |
781 | break; |
782 | ||
783 | case UI_END_FF_UPLOAD: | |
2d56f3a3 PL |
784 | retval = uinput_ff_upload_from_user(p, &ff_up); |
785 | if (retval) | |
1da177e4 | 786 | break; |
2d56f3a3 | 787 | |
1da177e4 | 788 | req = uinput_request_find(udev, ff_up.request_id); |
2d56f3a3 PL |
789 | if (!req || req->code != UI_FF_UPLOAD || |
790 | !req->u.upload.effect) { | |
1da177e4 LT |
791 | retval = -EINVAL; |
792 | break; | |
793 | } | |
2d56f3a3 | 794 | |
1da177e4 | 795 | req->retval = ff_up.retval; |
0048e603 | 796 | uinput_request_done(udev, req); |
1da177e4 LT |
797 | break; |
798 | ||
799 | case UI_END_FF_ERASE: | |
800 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { | |
801 | retval = -EFAULT; | |
802 | break; | |
803 | } | |
2d56f3a3 | 804 | |
1da177e4 | 805 | req = uinput_request_find(udev, ff_erase.request_id); |
2d56f3a3 | 806 | if (!req || req->code != UI_FF_ERASE) { |
1da177e4 LT |
807 | retval = -EINVAL; |
808 | break; | |
809 | } | |
2d56f3a3 | 810 | |
1da177e4 | 811 | req->retval = ff_erase.retval; |
0048e603 | 812 | uinput_request_done(udev, req); |
1da177e4 LT |
813 | break; |
814 | ||
815 | default: | |
816 | retval = -EINVAL; | |
817 | } | |
29506415 DT |
818 | |
819 | out: | |
221979aa | 820 | mutex_unlock(&udev->mutex); |
1da177e4 LT |
821 | return retval; |
822 | } | |
823 | ||
2d56f3a3 PL |
824 | static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
825 | { | |
826 | return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg); | |
827 | } | |
828 | ||
829 | #ifdef CONFIG_COMPAT | |
830 | static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
831 | { | |
832 | return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg)); | |
833 | } | |
834 | #endif | |
835 | ||
2b8693c0 | 836 | static const struct file_operations uinput_fops = { |
29506415 DT |
837 | .owner = THIS_MODULE, |
838 | .open = uinput_open, | |
839 | .release = uinput_release, | |
840 | .read = uinput_read, | |
841 | .write = uinput_write, | |
842 | .poll = uinput_poll, | |
843 | .unlocked_ioctl = uinput_ioctl, | |
2d56f3a3 PL |
844 | #ifdef CONFIG_COMPAT |
845 | .compat_ioctl = uinput_compat_ioctl, | |
846 | #endif | |
6038f373 | 847 | .llseek = no_llseek, |
1da177e4 LT |
848 | }; |
849 | ||
850 | static struct miscdevice uinput_misc = { | |
29506415 DT |
851 | .fops = &uinput_fops, |
852 | .minor = UINPUT_MINOR, | |
853 | .name = UINPUT_NAME, | |
1da177e4 | 854 | }; |
8905aaaf KS |
855 | MODULE_ALIAS_MISCDEV(UINPUT_MINOR); |
856 | MODULE_ALIAS("devname:" UINPUT_NAME); | |
1da177e4 LT |
857 | |
858 | static int __init uinput_init(void) | |
859 | { | |
860 | return misc_register(&uinput_misc); | |
861 | } | |
862 | ||
863 | static void __exit uinput_exit(void) | |
864 | { | |
865 | misc_deregister(&uinput_misc); | |
866 | } | |
867 | ||
868 | MODULE_AUTHOR("Aristeu Sergio Rozanski Filho"); | |
869 | MODULE_DESCRIPTION("User level driver support for input subsystem"); | |
870 | MODULE_LICENSE("GPL"); | |
ff462551 | 871 | MODULE_VERSION("0.3"); |
1da177e4 LT |
872 | |
873 | module_init(uinput_init); | |
874 | module_exit(uinput_exit); | |
875 |