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/slab.h> 34 #include <linux/module.h> 35 #include <linux/init.h> 36 #include <linux/smp_lock.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 lock_kernel(); 287 mutex_init(&newdev->mutex); 288 spin_lock_init(&newdev->requests_lock); 289 init_waitqueue_head(&newdev->requests_waitq); 290 init_waitqueue_head(&newdev->waitq); 291 newdev->state = UIST_NEW_DEVICE; 292 293 file->private_data = newdev; 294 unlock_kernel(); 295 296 return 0; 297 } 298 299 static int uinput_validate_absbits(struct input_dev *dev) 300 { 301 unsigned int cnt; 302 int retval = 0; 303 304 for (cnt = 0; cnt < ABS_MAX + 1; cnt++) { 305 if (!test_bit(cnt, dev->absbit)) 306 continue; 307 308 if ((dev->absmax[cnt] <= dev->absmin[cnt])) { 309 printk(KERN_DEBUG 310 "%s: invalid abs[%02x] min:%d max:%d\n", 311 UINPUT_NAME, cnt, 312 dev->absmin[cnt], dev->absmax[cnt]); 313 retval = -EINVAL; 314 break; 315 } 316 317 if (dev->absflat[cnt] > (dev->absmax[cnt] - dev->absmin[cnt])) { 318 printk(KERN_DEBUG 319 "%s: absflat[%02x] out of range: %d " 320 "(min:%d/max:%d)\n", 321 UINPUT_NAME, cnt, dev->absflat[cnt], 322 dev->absmin[cnt], dev->absmax[cnt]); 323 retval = -EINVAL; 324 break; 325 } 326 } 327 return retval; 328 } 329 330 static int uinput_allocate_device(struct uinput_device *udev) 331 { 332 udev->dev = input_allocate_device(); 333 if (!udev->dev) 334 return -ENOMEM; 335 336 udev->dev->event = uinput_dev_event; 337 input_set_drvdata(udev->dev, udev); 338 339 return 0; 340 } 341 342 static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) 343 { 344 struct uinput_user_dev *user_dev; 345 struct input_dev *dev; 346 char *name; 347 int size; 348 int retval; 349 350 if (count != sizeof(struct uinput_user_dev)) 351 return -EINVAL; 352 353 if (!udev->dev) { 354 retval = uinput_allocate_device(udev); 355 if (retval) 356 return retval; 357 } 358 359 dev = udev->dev; 360 361 user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL); 362 if (!user_dev) 363 return -ENOMEM; 364 365 if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) { 366 retval = -EFAULT; 367 goto exit; 368 } 369 370 udev->ff_effects_max = user_dev->ff_effects_max; 371 372 size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1; 373 if (!size) { 374 retval = -EINVAL; 375 goto exit; 376 } 377 378 kfree(dev->name); 379 dev->name = name = kmalloc(size, GFP_KERNEL); 380 if (!name) { 381 retval = -ENOMEM; 382 goto exit; 383 } 384 strlcpy(name, user_dev->name, size); 385 386 dev->id.bustype = user_dev->id.bustype; 387 dev->id.vendor = user_dev->id.vendor; 388 dev->id.product = user_dev->id.product; 389 dev->id.version = user_dev->id.version; 390 391 size = sizeof(int) * (ABS_MAX + 1); 392 memcpy(dev->absmax, user_dev->absmax, size); 393 memcpy(dev->absmin, user_dev->absmin, size); 394 memcpy(dev->absfuzz, user_dev->absfuzz, size); 395 memcpy(dev->absflat, user_dev->absflat, size); 396 397 /* check if absmin/absmax/absfuzz/absflat are filled as 398 * told in Documentation/input/input-programming.txt */ 399 if (test_bit(EV_ABS, dev->evbit)) { 400 retval = uinput_validate_absbits(dev); 401 if (retval < 0) 402 goto exit; 403 } 404 405 udev->state = UIST_SETUP_COMPLETE; 406 retval = count; 407 408 exit: 409 kfree(user_dev); 410 return retval; 411 } 412 413 static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) 414 { 415 struct input_event ev; 416 417 if (count < input_event_size()) 418 return -EINVAL; 419 420 if (input_event_from_user(buffer, &ev)) 421 return -EFAULT; 422 423 input_event(udev->dev, ev.type, ev.code, ev.value); 424 425 return input_event_size(); 426 } 427 428 static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) 429 { 430 struct uinput_device *udev = file->private_data; 431 int retval; 432 433 retval = mutex_lock_interruptible(&udev->mutex); 434 if (retval) 435 return retval; 436 437 retval = udev->state == UIST_CREATED ? 438 uinput_inject_event(udev, buffer, count) : 439 uinput_setup_device(udev, buffer, count); 440 441 mutex_unlock(&udev->mutex); 442 443 return retval; 444 } 445 446 static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) 447 { 448 struct uinput_device *udev = file->private_data; 449 int retval = 0; 450 451 if (udev->state != UIST_CREATED) 452 return -ENODEV; 453 454 if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK)) 455 return -EAGAIN; 456 457 retval = wait_event_interruptible(udev->waitq, 458 udev->head != udev->tail || udev->state != UIST_CREATED); 459 if (retval) 460 return retval; 461 462 retval = mutex_lock_interruptible(&udev->mutex); 463 if (retval) 464 return retval; 465 466 if (udev->state != UIST_CREATED) { 467 retval = -ENODEV; 468 goto out; 469 } 470 471 while (udev->head != udev->tail && retval + input_event_size() <= count) { 472 if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) { 473 retval = -EFAULT; 474 goto out; 475 } 476 udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; 477 retval += input_event_size(); 478 } 479 480 out: 481 mutex_unlock(&udev->mutex); 482 483 return retval; 484 } 485 486 static unsigned int uinput_poll(struct file *file, poll_table *wait) 487 { 488 struct uinput_device *udev = file->private_data; 489 490 poll_wait(file, &udev->waitq, wait); 491 492 if (udev->head != udev->tail) 493 return POLLIN | POLLRDNORM; 494 495 return 0; 496 } 497 498 static int uinput_release(struct inode *inode, struct file *file) 499 { 500 struct uinput_device *udev = file->private_data; 501 502 uinput_destroy_device(udev); 503 kfree(udev); 504 505 return 0; 506 } 507 508 #ifdef CONFIG_COMPAT 509 struct uinput_ff_upload_compat { 510 int request_id; 511 int retval; 512 struct ff_effect_compat effect; 513 struct ff_effect_compat old; 514 }; 515 516 static int uinput_ff_upload_to_user(char __user *buffer, 517 const struct uinput_ff_upload *ff_up) 518 { 519 if (INPUT_COMPAT_TEST) { 520 struct uinput_ff_upload_compat ff_up_compat; 521 522 ff_up_compat.request_id = ff_up->request_id; 523 ff_up_compat.retval = ff_up->retval; 524 /* 525 * It so happens that the pointer that gives us the trouble 526 * is the last field in the structure. Since we don't support 527 * custom waveforms in uinput anyway we can just copy the whole 528 * thing (to the compat size) and ignore the pointer. 529 */ 530 memcpy(&ff_up_compat.effect, &ff_up->effect, 531 sizeof(struct ff_effect_compat)); 532 memcpy(&ff_up_compat.old, &ff_up->old, 533 sizeof(struct ff_effect_compat)); 534 535 if (copy_to_user(buffer, &ff_up_compat, 536 sizeof(struct uinput_ff_upload_compat))) 537 return -EFAULT; 538 } else { 539 if (copy_to_user(buffer, ff_up, 540 sizeof(struct uinput_ff_upload))) 541 return -EFAULT; 542 } 543 544 return 0; 545 } 546 547 static int uinput_ff_upload_from_user(const char __user *buffer, 548 struct uinput_ff_upload *ff_up) 549 { 550 if (INPUT_COMPAT_TEST) { 551 struct uinput_ff_upload_compat ff_up_compat; 552 553 if (copy_from_user(&ff_up_compat, buffer, 554 sizeof(struct uinput_ff_upload_compat))) 555 return -EFAULT; 556 557 ff_up->request_id = ff_up_compat.request_id; 558 ff_up->retval = ff_up_compat.retval; 559 memcpy(&ff_up->effect, &ff_up_compat.effect, 560 sizeof(struct ff_effect_compat)); 561 memcpy(&ff_up->old, &ff_up_compat.old, 562 sizeof(struct ff_effect_compat)); 563 564 } else { 565 if (copy_from_user(ff_up, buffer, 566 sizeof(struct uinput_ff_upload))) 567 return -EFAULT; 568 } 569 570 return 0; 571 } 572 573 #else 574 575 static int uinput_ff_upload_to_user(char __user *buffer, 576 const struct uinput_ff_upload *ff_up) 577 { 578 if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload))) 579 return -EFAULT; 580 581 return 0; 582 } 583 584 static int uinput_ff_upload_from_user(const char __user *buffer, 585 struct uinput_ff_upload *ff_up) 586 { 587 if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload))) 588 return -EFAULT; 589 590 return 0; 591 } 592 593 #endif 594 595 #define uinput_set_bit(_arg, _bit, _max) \ 596 ({ \ 597 int __ret = 0; \ 598 if (udev->state == UIST_CREATED) \ 599 __ret = -EINVAL; \ 600 else if ((_arg) > (_max)) \ 601 __ret = -EINVAL; \ 602 else set_bit((_arg), udev->dev->_bit); \ 603 __ret; \ 604 }) 605 606 static long uinput_ioctl_handler(struct file *file, unsigned int cmd, 607 unsigned long arg, void __user *p) 608 { 609 int retval; 610 struct uinput_device *udev = file->private_data; 611 struct uinput_ff_upload ff_up; 612 struct uinput_ff_erase ff_erase; 613 struct uinput_request *req; 614 int length; 615 char *phys; 616 617 retval = mutex_lock_interruptible(&udev->mutex); 618 if (retval) 619 return retval; 620 621 if (!udev->dev) { 622 retval = uinput_allocate_device(udev); 623 if (retval) 624 goto out; 625 } 626 627 switch (cmd) { 628 case UI_DEV_CREATE: 629 retval = uinput_create_device(udev); 630 break; 631 632 case UI_DEV_DESTROY: 633 uinput_destroy_device(udev); 634 break; 635 636 case UI_SET_EVBIT: 637 retval = uinput_set_bit(arg, evbit, EV_MAX); 638 break; 639 640 case UI_SET_KEYBIT: 641 retval = uinput_set_bit(arg, keybit, KEY_MAX); 642 break; 643 644 case UI_SET_RELBIT: 645 retval = uinput_set_bit(arg, relbit, REL_MAX); 646 break; 647 648 case UI_SET_ABSBIT: 649 retval = uinput_set_bit(arg, absbit, ABS_MAX); 650 break; 651 652 case UI_SET_MSCBIT: 653 retval = uinput_set_bit(arg, mscbit, MSC_MAX); 654 break; 655 656 case UI_SET_LEDBIT: 657 retval = uinput_set_bit(arg, ledbit, LED_MAX); 658 break; 659 660 case UI_SET_SNDBIT: 661 retval = uinput_set_bit(arg, sndbit, SND_MAX); 662 break; 663 664 case UI_SET_FFBIT: 665 retval = uinput_set_bit(arg, ffbit, FF_MAX); 666 break; 667 668 case UI_SET_SWBIT: 669 retval = uinput_set_bit(arg, swbit, SW_MAX); 670 break; 671 672 case UI_SET_PHYS: 673 if (udev->state == UIST_CREATED) { 674 retval = -EINVAL; 675 goto out; 676 } 677 length = strnlen_user(p, 1024); 678 if (length <= 0) { 679 retval = -EFAULT; 680 break; 681 } 682 kfree(udev->dev->phys); 683 udev->dev->phys = phys = kmalloc(length, GFP_KERNEL); 684 if (!phys) { 685 retval = -ENOMEM; 686 break; 687 } 688 if (copy_from_user(phys, p, length)) { 689 udev->dev->phys = NULL; 690 kfree(phys); 691 retval = -EFAULT; 692 break; 693 } 694 phys[length - 1] = '\0'; 695 break; 696 697 case UI_BEGIN_FF_UPLOAD: 698 retval = uinput_ff_upload_from_user(p, &ff_up); 699 if (retval) 700 break; 701 702 req = uinput_request_find(udev, ff_up.request_id); 703 if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) { 704 retval = -EINVAL; 705 break; 706 } 707 708 ff_up.retval = 0; 709 ff_up.effect = *req->u.upload.effect; 710 if (req->u.upload.old) 711 ff_up.old = *req->u.upload.old; 712 else 713 memset(&ff_up.old, 0, sizeof(struct ff_effect)); 714 715 retval = uinput_ff_upload_to_user(p, &ff_up); 716 break; 717 718 case UI_BEGIN_FF_ERASE: 719 if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { 720 retval = -EFAULT; 721 break; 722 } 723 724 req = uinput_request_find(udev, ff_erase.request_id); 725 if (!req || req->code != UI_FF_ERASE) { 726 retval = -EINVAL; 727 break; 728 } 729 730 ff_erase.retval = 0; 731 ff_erase.effect_id = req->u.effect_id; 732 if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) { 733 retval = -EFAULT; 734 break; 735 } 736 737 break; 738 739 case UI_END_FF_UPLOAD: 740 retval = uinput_ff_upload_from_user(p, &ff_up); 741 if (retval) 742 break; 743 744 req = uinput_request_find(udev, ff_up.request_id); 745 if (!req || req->code != UI_FF_UPLOAD || 746 !req->u.upload.effect) { 747 retval = -EINVAL; 748 break; 749 } 750 751 req->retval = ff_up.retval; 752 uinput_request_done(udev, req); 753 break; 754 755 case UI_END_FF_ERASE: 756 if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { 757 retval = -EFAULT; 758 break; 759 } 760 761 req = uinput_request_find(udev, ff_erase.request_id); 762 if (!req || req->code != UI_FF_ERASE) { 763 retval = -EINVAL; 764 break; 765 } 766 767 req->retval = ff_erase.retval; 768 uinput_request_done(udev, req); 769 break; 770 771 default: 772 retval = -EINVAL; 773 } 774 775 out: 776 mutex_unlock(&udev->mutex); 777 return retval; 778 } 779 780 static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 781 { 782 return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg); 783 } 784 785 #ifdef CONFIG_COMPAT 786 static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 787 { 788 return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg)); 789 } 790 #endif 791 792 static const struct file_operations uinput_fops = { 793 .owner = THIS_MODULE, 794 .open = uinput_open, 795 .release = uinput_release, 796 .read = uinput_read, 797 .write = uinput_write, 798 .poll = uinput_poll, 799 .unlocked_ioctl = uinput_ioctl, 800 #ifdef CONFIG_COMPAT 801 .compat_ioctl = uinput_compat_ioctl, 802 #endif 803 }; 804 805 static struct miscdevice uinput_misc = { 806 .fops = &uinput_fops, 807 .minor = UINPUT_MINOR, 808 .name = UINPUT_NAME, 809 }; 810 811 static int __init uinput_init(void) 812 { 813 return misc_register(&uinput_misc); 814 } 815 816 static void __exit uinput_exit(void) 817 { 818 misc_deregister(&uinput_misc); 819 } 820 821 MODULE_AUTHOR("Aristeu Sergio Rozanski Filho"); 822 MODULE_DESCRIPTION("User level driver support for input subsystem"); 823 MODULE_LICENSE("GPL"); 824 MODULE_VERSION("0.3"); 825 826 module_init(uinput_init); 827 module_exit(uinput_exit); 828 829