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 * 0.3 09/04/2006 (Anssi Hannula <anssi.hannula@gmail.com>) 24 * - updated ff support for the changes in kernel interface 25 * - added MODULE_VERSION 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> 33 #include <linux/sched.h> 34 #include <linux/slab.h> 35 #include <linux/module.h> 36 #include <linux/init.h> 37 #include <linux/fs.h> 38 #include <linux/miscdevice.h> 39 #include <linux/uinput.h> 40 #include "../input-compat.h" 41 42 static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 43 { 44 struct uinput_device *udev = input_get_drvdata(dev); 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 57 /* Atomically allocate an ID for the given request. Returns 0 on success. */ 58 static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request) 59 { 60 int id; 61 int err = -1; 62 63 spin_lock(&udev->requests_lock); 64 65 for (id = 0; id < UINPUT_NUM_REQUESTS; id++) { 66 if (!udev->requests[id]) { 67 request->id = id; 68 udev->requests[id] = request; 69 err = 0; 70 break; 71 } 72 } 73 74 spin_unlock(&udev->requests_lock); 75 return err; 76 } 77 78 static struct uinput_request *uinput_request_find(struct uinput_device *udev, int id) 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; 83 84 return udev->requests[id]; 85 } 86 87 static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request) 88 { 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 } 93 94 static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request) 95 { 96 /* Mark slot as available */ 97 udev->requests[request->id] = NULL; 98 wake_up(&udev->requests_waitq); 99 100 complete(&request->done); 101 } 102 103 static int uinput_request_submit(struct uinput_device *udev, struct uinput_request *request) 104 { 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 } 119 120 /* Tell our userspace app about this new request by queueing an input event */ 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; 136 137 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); 148 } 149 150 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) 166 { 167 struct uinput_device *udev = input_get_drvdata(dev); 168 struct uinput_request request; 169 int retval; 170 171 /* 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; 181 182 request.id = -1; 183 init_completion(&request.done); 184 request.code = UI_FF_UPLOAD; 185 request.u.upload.effect = effect; 186 request.u.upload.old = old; 187 188 retval = uinput_request_submit(udev, &request); 189 if (!retval) { 190 wait_for_completion(&request.done); 191 retval = request.retval; 192 } 193 194 return retval; 195 } 196 197 static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id) 198 { 199 struct uinput_device *udev = input_get_drvdata(dev); 200 struct uinput_request request; 201 int retval; 202 203 if (!test_bit(EV_FF, dev->evbit)) 204 return -ENOSYS; 205 206 request.id = -1; 207 init_completion(&request.done); 208 request.code = UI_FF_ERASE; 209 request.u.effect_id = effect_id; 210 211 retval = uinput_request_submit(udev, &request); 212 if (!retval) { 213 wait_for_completion(&request.done); 214 retval = request.retval; 215 } 216 217 return retval; 218 } 219 220 static void uinput_destroy_device(struct uinput_device *udev) 221 { 222 const char *name, *phys; 223 struct input_dev *dev = udev->dev; 224 enum uinput_state old_state = udev->state; 225 226 udev->state = UIST_NEW_DEVICE; 227 228 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 } 237 kfree(name); 238 kfree(phys); 239 udev->dev = NULL; 240 } 241 } 242 243 static int uinput_create_device(struct uinput_device *udev) 244 { 245 struct input_dev *dev = udev->dev; 246 int error; 247 248 if (udev->state != UIST_SETUP_COMPLETE) { 249 printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME); 250 return -EINVAL; 251 } 252 253 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; 263 } 264 265 error = input_register_device(udev->dev); 266 if (error) 267 goto fail2; 268 269 udev->state = UIST_CREATED; 270 271 return 0; 272 273 fail2: input_ff_destroy(dev); 274 fail1: uinput_destroy_device(udev); 275 return error; 276 } 277 278 static int uinput_open(struct inode *inode, struct file *file) 279 { 280 struct uinput_device *newdev; 281 282 newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL); 283 if (!newdev) 284 return -ENOMEM; 285 286 mutex_init(&newdev->mutex); 287 spin_lock_init(&newdev->requests_lock); 288 init_waitqueue_head(&newdev->requests_waitq); 289 init_waitqueue_head(&newdev->waitq); 290 newdev->state = UIST_NEW_DEVICE; 291 292 file->private_data = newdev; 293 nonseekable_open(inode, file); 294 295 return 0; 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_CNT; 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 } 328 329 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; 336 input_set_drvdata(udev->dev, udev); 337 338 return 0; 339 } 340 341 static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) 342 { 343 struct uinput_user_dev *user_dev; 344 struct input_dev *dev; 345 char *name; 346 int size; 347 int retval; 348 349 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 } 357 358 dev = udev->dev; 359 360 user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL); 361 if (!user_dev) 362 return -ENOMEM; 363 364 if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) { 365 retval = -EFAULT; 366 goto exit; 367 } 368 369 udev->ff_effects_max = user_dev->ff_effects_max; 370 371 size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1; 372 if (!size) { 373 retval = -EINVAL; 374 goto exit; 375 } 376 377 kfree(dev->name); 378 dev->name = name = kmalloc(size, GFP_KERNEL); 379 if (!name) { 380 retval = -ENOMEM; 381 goto exit; 382 } 383 strlcpy(name, user_dev->name, size); 384 385 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; 389 390 size = sizeof(int) * ABS_CNT; 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)) { 399 retval = uinput_validate_absbits(dev); 400 if (retval < 0) 401 goto exit; 402 } 403 404 udev->state = UIST_SETUP_COMPLETE; 405 retval = count; 406 407 exit: 408 kfree(user_dev); 409 return retval; 410 } 411 412 static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) 413 { 414 struct input_event ev; 415 416 if (count < input_event_size()) 417 return -EINVAL; 418 419 if (input_event_from_user(buffer, &ev)) 420 return -EFAULT; 421 422 input_event(udev->dev, ev.type, ev.code, ev.value); 423 424 return input_event_size(); 425 } 426 427 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; 430 int retval; 431 432 retval = mutex_lock_interruptible(&udev->mutex); 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); 439 440 mutex_unlock(&udev->mutex); 441 442 return retval; 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; 449 450 if (udev->state != UIST_CREATED) 451 return -ENODEV; 452 453 if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK)) 454 return -EAGAIN; 455 456 retval = wait_event_interruptible(udev->waitq, 457 udev->head != udev->tail || udev->state != UIST_CREATED); 458 if (retval) 459 return retval; 460 461 retval = mutex_lock_interruptible(&udev->mutex); 462 if (retval) 463 return retval; 464 465 if (udev->state != UIST_CREATED) { 466 retval = -ENODEV; 467 goto out; 468 } 469 470 while (udev->head != udev->tail && retval + input_event_size() <= count) { 471 if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) { 472 retval = -EFAULT; 473 goto out; 474 } 475 udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; 476 retval += input_event_size(); 477 } 478 479 out: 480 mutex_unlock(&udev->mutex); 481 482 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 } 496 497 static int uinput_release(struct inode *inode, struct file *file) 498 { 499 struct uinput_device *udev = file->private_data; 500 501 uinput_destroy_device(udev); 502 kfree(udev); 503 504 return 0; 505 } 506 507 #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 593 594 #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 }) 604 605 static long uinput_ioctl_handler(struct file *file, unsigned int cmd, 606 unsigned long arg, void __user *p) 607 { 608 int retval; 609 struct uinput_device *udev = file->private_data; 610 struct uinput_ff_upload ff_up; 611 struct uinput_ff_erase ff_erase; 612 struct uinput_request *req; 613 int length; 614 char *phys; 615 616 retval = mutex_lock_interruptible(&udev->mutex); 617 if (retval) 618 return retval; 619 620 if (!udev->dev) { 621 retval = uinput_allocate_device(udev); 622 if (retval) 623 goto out; 624 } 625 626 switch (cmd) { 627 case UI_DEV_CREATE: 628 retval = uinput_create_device(udev); 629 break; 630 631 case UI_DEV_DESTROY: 632 uinput_destroy_device(udev); 633 break; 634 635 case UI_SET_EVBIT: 636 retval = uinput_set_bit(arg, evbit, EV_MAX); 637 break; 638 639 case UI_SET_KEYBIT: 640 retval = uinput_set_bit(arg, keybit, KEY_MAX); 641 break; 642 643 case UI_SET_RELBIT: 644 retval = uinput_set_bit(arg, relbit, REL_MAX); 645 break; 646 647 case UI_SET_ABSBIT: 648 retval = uinput_set_bit(arg, absbit, ABS_MAX); 649 break; 650 651 case UI_SET_MSCBIT: 652 retval = uinput_set_bit(arg, mscbit, MSC_MAX); 653 break; 654 655 case UI_SET_LEDBIT: 656 retval = uinput_set_bit(arg, ledbit, LED_MAX); 657 break; 658 659 case UI_SET_SNDBIT: 660 retval = uinput_set_bit(arg, sndbit, SND_MAX); 661 break; 662 663 case UI_SET_FFBIT: 664 retval = uinput_set_bit(arg, ffbit, FF_MAX); 665 break; 666 667 case UI_SET_SWBIT: 668 retval = uinput_set_bit(arg, swbit, SW_MAX); 669 break; 670 671 case UI_SET_PHYS: 672 if (udev->state == UIST_CREATED) { 673 retval = -EINVAL; 674 goto out; 675 } 676 length = strnlen_user(p, 1024); 677 if (length <= 0) { 678 retval = -EFAULT; 679 break; 680 } 681 kfree(udev->dev->phys); 682 udev->dev->phys = phys = kmalloc(length, GFP_KERNEL); 683 if (!phys) { 684 retval = -ENOMEM; 685 break; 686 } 687 if (copy_from_user(phys, p, length)) { 688 udev->dev->phys = NULL; 689 kfree(phys); 690 retval = -EFAULT; 691 break; 692 } 693 phys[length - 1] = '\0'; 694 break; 695 696 case UI_BEGIN_FF_UPLOAD: 697 retval = uinput_ff_upload_from_user(p, &ff_up); 698 if (retval) 699 break; 700 701 req = uinput_request_find(udev, ff_up.request_id); 702 if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) { 703 retval = -EINVAL; 704 break; 705 } 706 707 ff_up.retval = 0; 708 ff_up.effect = *req->u.upload.effect; 709 if (req->u.upload.old) 710 ff_up.old = *req->u.upload.old; 711 else 712 memset(&ff_up.old, 0, sizeof(struct ff_effect)); 713 714 retval = uinput_ff_upload_to_user(p, &ff_up); 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 } 722 723 req = uinput_request_find(udev, ff_erase.request_id); 724 if (!req || req->code != UI_FF_ERASE) { 725 retval = -EINVAL; 726 break; 727 } 728 729 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 } 735 736 break; 737 738 case UI_END_FF_UPLOAD: 739 retval = uinput_ff_upload_from_user(p, &ff_up); 740 if (retval) 741 break; 742 743 req = uinput_request_find(udev, ff_up.request_id); 744 if (!req || req->code != UI_FF_UPLOAD || 745 !req->u.upload.effect) { 746 retval = -EINVAL; 747 break; 748 } 749 750 req->retval = ff_up.retval; 751 uinput_request_done(udev, req); 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 } 759 760 req = uinput_request_find(udev, ff_erase.request_id); 761 if (!req || req->code != UI_FF_ERASE) { 762 retval = -EINVAL; 763 break; 764 } 765 766 req->retval = ff_erase.retval; 767 uinput_request_done(udev, req); 768 break; 769 770 default: 771 retval = -EINVAL; 772 } 773 774 out: 775 mutex_unlock(&udev->mutex); 776 return retval; 777 } 778 779 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 790 791 static const struct file_operations uinput_fops = { 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, 799 #ifdef CONFIG_COMPAT 800 .compat_ioctl = uinput_compat_ioctl, 801 #endif 802 }; 803 804 static struct miscdevice uinput_misc = { 805 .fops = &uinput_fops, 806 .minor = UINPUT_MINOR, 807 .name = UINPUT_NAME, 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"); 823 MODULE_VERSION("0.3"); 824 825 module_init(uinput_init); 826 module_exit(uinput_exit); 827 828