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/smp_lock.h> 38 #include <linux/fs.h> 39 #include <linux/miscdevice.h> 40 #include <linux/uinput.h> 41 #include "../input-compat.h" 42 43 static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 44 { 45 struct uinput_device *udev = input_get_drvdata(dev); 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 58 /* Atomically allocate an ID for the given request. Returns 0 on success. */ 59 static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request) 60 { 61 int id; 62 int err = -1; 63 64 spin_lock(&udev->requests_lock); 65 66 for (id = 0; id < UINPUT_NUM_REQUESTS; id++) { 67 if (!udev->requests[id]) { 68 request->id = id; 69 udev->requests[id] = request; 70 err = 0; 71 break; 72 } 73 } 74 75 spin_unlock(&udev->requests_lock); 76 return err; 77 } 78 79 static struct uinput_request *uinput_request_find(struct uinput_device *udev, int id) 80 { 81 /* Find an input request, by ID. Returns NULL if the ID isn't valid. */ 82 if (id >= UINPUT_NUM_REQUESTS || id < 0) 83 return NULL; 84 85 return udev->requests[id]; 86 } 87 88 static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request) 89 { 90 /* Allocate slot. If none are available right away, wait. */ 91 return wait_event_interruptible(udev->requests_waitq, 92 !uinput_request_alloc_id(udev, request)); 93 } 94 95 static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request) 96 { 97 /* Mark slot as available */ 98 udev->requests[request->id] = NULL; 99 wake_up(&udev->requests_waitq); 100 101 complete(&request->done); 102 } 103 104 static int uinput_request_submit(struct uinput_device *udev, struct uinput_request *request) 105 { 106 int retval; 107 108 retval = uinput_request_reserve_slot(udev, request); 109 if (retval) 110 return retval; 111 112 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 } 120 121 /* Tell our userspace app about this new request by queueing an input event */ 122 uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id); 123 124 out: 125 mutex_unlock(&udev->mutex); 126 return retval; 127 } 128 129 /* 130 * Fail all ouitstanding requests so handlers don't wait for the userspace 131 * to finish processing them. 132 */ 133 static void uinput_flush_requests(struct uinput_device *udev) 134 { 135 struct uinput_request *request; 136 int i; 137 138 spin_lock(&udev->requests_lock); 139 140 for (i = 0; i < UINPUT_NUM_REQUESTS; i++) { 141 request = udev->requests[i]; 142 if (request) { 143 request->retval = -ENODEV; 144 uinput_request_done(udev, request); 145 } 146 } 147 148 spin_unlock(&udev->requests_lock); 149 } 150 151 static void uinput_dev_set_gain(struct input_dev *dev, u16 gain) 152 { 153 uinput_dev_event(dev, EV_FF, FF_GAIN, gain); 154 } 155 156 static void uinput_dev_set_autocenter(struct input_dev *dev, u16 magnitude) 157 { 158 uinput_dev_event(dev, EV_FF, FF_AUTOCENTER, magnitude); 159 } 160 161 static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value) 162 { 163 return uinput_dev_event(dev, EV_FF, effect_id, value); 164 } 165 166 static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old) 167 { 168 struct uinput_device *udev = input_get_drvdata(dev); 169 struct uinput_request request; 170 int retval; 171 172 /* 173 * uinput driver does not currently support periodic effects with 174 * custom waveform since it does not have a way to pass buffer of 175 * samples (custom_data) to userspace. If ever there is a device 176 * supporting custom waveforms we would need to define an additional 177 * ioctl (UI_UPLOAD_SAMPLES) but for now we just bail out. 178 */ 179 if (effect->type == FF_PERIODIC && 180 effect->u.periodic.waveform == FF_CUSTOM) 181 return -EINVAL; 182 183 request.id = -1; 184 init_completion(&request.done); 185 request.code = UI_FF_UPLOAD; 186 request.u.upload.effect = effect; 187 request.u.upload.old = old; 188 189 retval = uinput_request_submit(udev, &request); 190 if (!retval) { 191 wait_for_completion(&request.done); 192 retval = request.retval; 193 } 194 195 return retval; 196 } 197 198 static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id) 199 { 200 struct uinput_device *udev = input_get_drvdata(dev); 201 struct uinput_request request; 202 int retval; 203 204 if (!test_bit(EV_FF, dev->evbit)) 205 return -ENOSYS; 206 207 request.id = -1; 208 init_completion(&request.done); 209 request.code = UI_FF_ERASE; 210 request.u.effect_id = effect_id; 211 212 retval = uinput_request_submit(udev, &request); 213 if (!retval) { 214 wait_for_completion(&request.done); 215 retval = request.retval; 216 } 217 218 return retval; 219 } 220 221 static void uinput_destroy_device(struct uinput_device *udev) 222 { 223 const char *name, *phys; 224 struct input_dev *dev = udev->dev; 225 enum uinput_state old_state = udev->state; 226 227 udev->state = UIST_NEW_DEVICE; 228 229 if (dev) { 230 name = dev->name; 231 phys = dev->phys; 232 if (old_state == UIST_CREATED) { 233 uinput_flush_requests(udev); 234 input_unregister_device(dev); 235 } else { 236 input_free_device(dev); 237 } 238 kfree(name); 239 kfree(phys); 240 udev->dev = NULL; 241 } 242 } 243 244 static int uinput_create_device(struct uinput_device *udev) 245 { 246 struct input_dev *dev = udev->dev; 247 int error; 248 249 if (udev->state != UIST_SETUP_COMPLETE) { 250 printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME); 251 return -EINVAL; 252 } 253 254 if (udev->ff_effects_max) { 255 error = input_ff_create(dev, udev->ff_effects_max); 256 if (error) 257 goto fail1; 258 259 dev->ff->upload = uinput_dev_upload_effect; 260 dev->ff->erase = uinput_dev_erase_effect; 261 dev->ff->playback = uinput_dev_playback; 262 dev->ff->set_gain = uinput_dev_set_gain; 263 dev->ff->set_autocenter = uinput_dev_set_autocenter; 264 } 265 266 error = input_register_device(udev->dev); 267 if (error) 268 goto fail2; 269 270 udev->state = UIST_CREATED; 271 272 return 0; 273 274 fail2: input_ff_destroy(dev); 275 fail1: uinput_destroy_device(udev); 276 return error; 277 } 278 279 static int uinput_open(struct inode *inode, struct file *file) 280 { 281 struct uinput_device *newdev; 282 283 newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL); 284 if (!newdev) 285 return -ENOMEM; 286 287 lock_kernel(); 288 mutex_init(&newdev->mutex); 289 spin_lock_init(&newdev->requests_lock); 290 init_waitqueue_head(&newdev->requests_waitq); 291 init_waitqueue_head(&newdev->waitq); 292 newdev->state = UIST_NEW_DEVICE; 293 294 file->private_data = newdev; 295 unlock_kernel(); 296 297 return 0; 298 } 299 300 static int uinput_validate_absbits(struct input_dev *dev) 301 { 302 unsigned int cnt; 303 int retval = 0; 304 305 for (cnt = 0; cnt < ABS_MAX + 1; cnt++) { 306 if (!test_bit(cnt, dev->absbit)) 307 continue; 308 309 if ((dev->absmax[cnt] <= dev->absmin[cnt])) { 310 printk(KERN_DEBUG 311 "%s: invalid abs[%02x] min:%d max:%d\n", 312 UINPUT_NAME, cnt, 313 dev->absmin[cnt], dev->absmax[cnt]); 314 retval = -EINVAL; 315 break; 316 } 317 318 if (dev->absflat[cnt] > (dev->absmax[cnt] - dev->absmin[cnt])) { 319 printk(KERN_DEBUG 320 "%s: absflat[%02x] out of range: %d " 321 "(min:%d/max:%d)\n", 322 UINPUT_NAME, cnt, dev->absflat[cnt], 323 dev->absmin[cnt], dev->absmax[cnt]); 324 retval = -EINVAL; 325 break; 326 } 327 } 328 return retval; 329 } 330 331 static int uinput_allocate_device(struct uinput_device *udev) 332 { 333 udev->dev = input_allocate_device(); 334 if (!udev->dev) 335 return -ENOMEM; 336 337 udev->dev->event = uinput_dev_event; 338 input_set_drvdata(udev->dev, udev); 339 340 return 0; 341 } 342 343 static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) 344 { 345 struct uinput_user_dev *user_dev; 346 struct input_dev *dev; 347 char *name; 348 int size; 349 int retval; 350 351 if (count != sizeof(struct uinput_user_dev)) 352 return -EINVAL; 353 354 if (!udev->dev) { 355 retval = uinput_allocate_device(udev); 356 if (retval) 357 return retval; 358 } 359 360 dev = udev->dev; 361 362 user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL); 363 if (!user_dev) 364 return -ENOMEM; 365 366 if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) { 367 retval = -EFAULT; 368 goto exit; 369 } 370 371 udev->ff_effects_max = user_dev->ff_effects_max; 372 373 size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1; 374 if (!size) { 375 retval = -EINVAL; 376 goto exit; 377 } 378 379 kfree(dev->name); 380 dev->name = name = kmalloc(size, GFP_KERNEL); 381 if (!name) { 382 retval = -ENOMEM; 383 goto exit; 384 } 385 strlcpy(name, user_dev->name, size); 386 387 dev->id.bustype = user_dev->id.bustype; 388 dev->id.vendor = user_dev->id.vendor; 389 dev->id.product = user_dev->id.product; 390 dev->id.version = user_dev->id.version; 391 392 size = sizeof(int) * (ABS_MAX + 1); 393 memcpy(dev->absmax, user_dev->absmax, size); 394 memcpy(dev->absmin, user_dev->absmin, size); 395 memcpy(dev->absfuzz, user_dev->absfuzz, size); 396 memcpy(dev->absflat, user_dev->absflat, size); 397 398 /* check if absmin/absmax/absfuzz/absflat are filled as 399 * told in Documentation/input/input-programming.txt */ 400 if (test_bit(EV_ABS, dev->evbit)) { 401 retval = uinput_validate_absbits(dev); 402 if (retval < 0) 403 goto exit; 404 } 405 406 udev->state = UIST_SETUP_COMPLETE; 407 retval = count; 408 409 exit: 410 kfree(user_dev); 411 return retval; 412 } 413 414 static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) 415 { 416 struct input_event ev; 417 418 if (count < input_event_size()) 419 return -EINVAL; 420 421 if (input_event_from_user(buffer, &ev)) 422 return -EFAULT; 423 424 input_event(udev->dev, ev.type, ev.code, ev.value); 425 426 return input_event_size(); 427 } 428 429 static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) 430 { 431 struct uinput_device *udev = file->private_data; 432 int retval; 433 434 retval = mutex_lock_interruptible(&udev->mutex); 435 if (retval) 436 return retval; 437 438 retval = udev->state == UIST_CREATED ? 439 uinput_inject_event(udev, buffer, count) : 440 uinput_setup_device(udev, buffer, count); 441 442 mutex_unlock(&udev->mutex); 443 444 return retval; 445 } 446 447 static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) 448 { 449 struct uinput_device *udev = file->private_data; 450 int retval = 0; 451 452 if (udev->state != UIST_CREATED) 453 return -ENODEV; 454 455 if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK)) 456 return -EAGAIN; 457 458 retval = wait_event_interruptible(udev->waitq, 459 udev->head != udev->tail || udev->state != UIST_CREATED); 460 if (retval) 461 return retval; 462 463 retval = mutex_lock_interruptible(&udev->mutex); 464 if (retval) 465 return retval; 466 467 if (udev->state != UIST_CREATED) { 468 retval = -ENODEV; 469 goto out; 470 } 471 472 while (udev->head != udev->tail && retval + input_event_size() <= count) { 473 if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) { 474 retval = -EFAULT; 475 goto out; 476 } 477 udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; 478 retval += input_event_size(); 479 } 480 481 out: 482 mutex_unlock(&udev->mutex); 483 484 return retval; 485 } 486 487 static unsigned int uinput_poll(struct file *file, poll_table *wait) 488 { 489 struct uinput_device *udev = file->private_data; 490 491 poll_wait(file, &udev->waitq, wait); 492 493 if (udev->head != udev->tail) 494 return POLLIN | POLLRDNORM; 495 496 return 0; 497 } 498 499 static int uinput_release(struct inode *inode, struct file *file) 500 { 501 struct uinput_device *udev = file->private_data; 502 503 uinput_destroy_device(udev); 504 kfree(udev); 505 506 return 0; 507 } 508 509 #ifdef CONFIG_COMPAT 510 struct uinput_ff_upload_compat { 511 int request_id; 512 int retval; 513 struct ff_effect_compat effect; 514 struct ff_effect_compat old; 515 }; 516 517 static int uinput_ff_upload_to_user(char __user *buffer, 518 const struct uinput_ff_upload *ff_up) 519 { 520 if (INPUT_COMPAT_TEST) { 521 struct uinput_ff_upload_compat ff_up_compat; 522 523 ff_up_compat.request_id = ff_up->request_id; 524 ff_up_compat.retval = ff_up->retval; 525 /* 526 * It so happens that the pointer that gives us the trouble 527 * is the last field in the structure. Since we don't support 528 * custom waveforms in uinput anyway we can just copy the whole 529 * thing (to the compat size) and ignore the pointer. 530 */ 531 memcpy(&ff_up_compat.effect, &ff_up->effect, 532 sizeof(struct ff_effect_compat)); 533 memcpy(&ff_up_compat.old, &ff_up->old, 534 sizeof(struct ff_effect_compat)); 535 536 if (copy_to_user(buffer, &ff_up_compat, 537 sizeof(struct uinput_ff_upload_compat))) 538 return -EFAULT; 539 } else { 540 if (copy_to_user(buffer, ff_up, 541 sizeof(struct uinput_ff_upload))) 542 return -EFAULT; 543 } 544 545 return 0; 546 } 547 548 static int uinput_ff_upload_from_user(const char __user *buffer, 549 struct uinput_ff_upload *ff_up) 550 { 551 if (INPUT_COMPAT_TEST) { 552 struct uinput_ff_upload_compat ff_up_compat; 553 554 if (copy_from_user(&ff_up_compat, buffer, 555 sizeof(struct uinput_ff_upload_compat))) 556 return -EFAULT; 557 558 ff_up->request_id = ff_up_compat.request_id; 559 ff_up->retval = ff_up_compat.retval; 560 memcpy(&ff_up->effect, &ff_up_compat.effect, 561 sizeof(struct ff_effect_compat)); 562 memcpy(&ff_up->old, &ff_up_compat.old, 563 sizeof(struct ff_effect_compat)); 564 565 } else { 566 if (copy_from_user(ff_up, buffer, 567 sizeof(struct uinput_ff_upload))) 568 return -EFAULT; 569 } 570 571 return 0; 572 } 573 574 #else 575 576 static int uinput_ff_upload_to_user(char __user *buffer, 577 const struct uinput_ff_upload *ff_up) 578 { 579 if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload))) 580 return -EFAULT; 581 582 return 0; 583 } 584 585 static int uinput_ff_upload_from_user(const char __user *buffer, 586 struct uinput_ff_upload *ff_up) 587 { 588 if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload))) 589 return -EFAULT; 590 591 return 0; 592 } 593 594 #endif 595 596 #define uinput_set_bit(_arg, _bit, _max) \ 597 ({ \ 598 int __ret = 0; \ 599 if (udev->state == UIST_CREATED) \ 600 __ret = -EINVAL; \ 601 else if ((_arg) > (_max)) \ 602 __ret = -EINVAL; \ 603 else set_bit((_arg), udev->dev->_bit); \ 604 __ret; \ 605 }) 606 607 static long uinput_ioctl_handler(struct file *file, unsigned int cmd, 608 unsigned long arg, void __user *p) 609 { 610 int retval; 611 struct uinput_device *udev = file->private_data; 612 struct uinput_ff_upload ff_up; 613 struct uinput_ff_erase ff_erase; 614 struct uinput_request *req; 615 int length; 616 char *phys; 617 618 retval = mutex_lock_interruptible(&udev->mutex); 619 if (retval) 620 return retval; 621 622 if (!udev->dev) { 623 retval = uinput_allocate_device(udev); 624 if (retval) 625 goto out; 626 } 627 628 switch (cmd) { 629 case UI_DEV_CREATE: 630 retval = uinput_create_device(udev); 631 break; 632 633 case UI_DEV_DESTROY: 634 uinput_destroy_device(udev); 635 break; 636 637 case UI_SET_EVBIT: 638 retval = uinput_set_bit(arg, evbit, EV_MAX); 639 break; 640 641 case UI_SET_KEYBIT: 642 retval = uinput_set_bit(arg, keybit, KEY_MAX); 643 break; 644 645 case UI_SET_RELBIT: 646 retval = uinput_set_bit(arg, relbit, REL_MAX); 647 break; 648 649 case UI_SET_ABSBIT: 650 retval = uinput_set_bit(arg, absbit, ABS_MAX); 651 break; 652 653 case UI_SET_MSCBIT: 654 retval = uinput_set_bit(arg, mscbit, MSC_MAX); 655 break; 656 657 case UI_SET_LEDBIT: 658 retval = uinput_set_bit(arg, ledbit, LED_MAX); 659 break; 660 661 case UI_SET_SNDBIT: 662 retval = uinput_set_bit(arg, sndbit, SND_MAX); 663 break; 664 665 case UI_SET_FFBIT: 666 retval = uinput_set_bit(arg, ffbit, FF_MAX); 667 break; 668 669 case UI_SET_SWBIT: 670 retval = uinput_set_bit(arg, swbit, SW_MAX); 671 break; 672 673 case UI_SET_PHYS: 674 if (udev->state == UIST_CREATED) { 675 retval = -EINVAL; 676 goto out; 677 } 678 length = strnlen_user(p, 1024); 679 if (length <= 0) { 680 retval = -EFAULT; 681 break; 682 } 683 kfree(udev->dev->phys); 684 udev->dev->phys = phys = kmalloc(length, GFP_KERNEL); 685 if (!phys) { 686 retval = -ENOMEM; 687 break; 688 } 689 if (copy_from_user(phys, p, length)) { 690 udev->dev->phys = NULL; 691 kfree(phys); 692 retval = -EFAULT; 693 break; 694 } 695 phys[length - 1] = '\0'; 696 break; 697 698 case UI_BEGIN_FF_UPLOAD: 699 retval = uinput_ff_upload_from_user(p, &ff_up); 700 if (retval) 701 break; 702 703 req = uinput_request_find(udev, ff_up.request_id); 704 if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) { 705 retval = -EINVAL; 706 break; 707 } 708 709 ff_up.retval = 0; 710 ff_up.effect = *req->u.upload.effect; 711 if (req->u.upload.old) 712 ff_up.old = *req->u.upload.old; 713 else 714 memset(&ff_up.old, 0, sizeof(struct ff_effect)); 715 716 retval = uinput_ff_upload_to_user(p, &ff_up); 717 break; 718 719 case UI_BEGIN_FF_ERASE: 720 if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { 721 retval = -EFAULT; 722 break; 723 } 724 725 req = uinput_request_find(udev, ff_erase.request_id); 726 if (!req || req->code != UI_FF_ERASE) { 727 retval = -EINVAL; 728 break; 729 } 730 731 ff_erase.retval = 0; 732 ff_erase.effect_id = req->u.effect_id; 733 if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) { 734 retval = -EFAULT; 735 break; 736 } 737 738 break; 739 740 case UI_END_FF_UPLOAD: 741 retval = uinput_ff_upload_from_user(p, &ff_up); 742 if (retval) 743 break; 744 745 req = uinput_request_find(udev, ff_up.request_id); 746 if (!req || req->code != UI_FF_UPLOAD || 747 !req->u.upload.effect) { 748 retval = -EINVAL; 749 break; 750 } 751 752 req->retval = ff_up.retval; 753 uinput_request_done(udev, req); 754 break; 755 756 case UI_END_FF_ERASE: 757 if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { 758 retval = -EFAULT; 759 break; 760 } 761 762 req = uinput_request_find(udev, ff_erase.request_id); 763 if (!req || req->code != UI_FF_ERASE) { 764 retval = -EINVAL; 765 break; 766 } 767 768 req->retval = ff_erase.retval; 769 uinput_request_done(udev, req); 770 break; 771 772 default: 773 retval = -EINVAL; 774 } 775 776 out: 777 mutex_unlock(&udev->mutex); 778 return retval; 779 } 780 781 static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 782 { 783 return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg); 784 } 785 786 #ifdef CONFIG_COMPAT 787 static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 788 { 789 return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg)); 790 } 791 #endif 792 793 static const struct file_operations uinput_fops = { 794 .owner = THIS_MODULE, 795 .open = uinput_open, 796 .release = uinput_release, 797 .read = uinput_read, 798 .write = uinput_write, 799 .poll = uinput_poll, 800 .unlocked_ioctl = uinput_ioctl, 801 #ifdef CONFIG_COMPAT 802 .compat_ioctl = uinput_compat_ioctl, 803 #endif 804 }; 805 806 static struct miscdevice uinput_misc = { 807 .fops = &uinput_fops, 808 .minor = UINPUT_MINOR, 809 .name = UINPUT_NAME, 810 }; 811 812 static int __init uinput_init(void) 813 { 814 return misc_register(&uinput_misc); 815 } 816 817 static void __exit uinput_exit(void) 818 { 819 misc_deregister(&uinput_misc); 820 } 821 822 MODULE_AUTHOR("Aristeu Sergio Rozanski Filho"); 823 MODULE_DESCRIPTION("User level driver support for input subsystem"); 824 MODULE_LICENSE("GPL"); 825 MODULE_VERSION("0.3"); 826 827 module_init(uinput_init); 828 module_exit(uinput_exit); 829 830