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 (input_abs_get_max(dev, cnt) <= input_abs_get_min(dev, cnt)) { 308 printk(KERN_DEBUG 309 "%s: invalid abs[%02x] min:%d max:%d\n", 310 UINPUT_NAME, cnt, 311 input_abs_get_min(dev, cnt), 312 input_abs_get_max(dev, cnt)); 313 retval = -EINVAL; 314 break; 315 } 316 317 if (input_abs_get_flat(dev, cnt) > 318 input_abs_get_max(dev, cnt) - input_abs_get_min(dev, cnt)) { 319 printk(KERN_DEBUG 320 "%s: abs_flat #%02x out of range: %d " 321 "(min:%d/max:%d)\n", 322 UINPUT_NAME, cnt, 323 input_abs_get_flat(dev, cnt), 324 input_abs_get_min(dev, cnt), 325 input_abs_get_max(dev, cnt)); 326 retval = -EINVAL; 327 break; 328 } 329 } 330 return retval; 331 } 332 333 static int uinput_allocate_device(struct uinput_device *udev) 334 { 335 udev->dev = input_allocate_device(); 336 if (!udev->dev) 337 return -ENOMEM; 338 339 udev->dev->event = uinput_dev_event; 340 input_set_drvdata(udev->dev, udev); 341 342 return 0; 343 } 344 345 static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) 346 { 347 struct uinput_user_dev *user_dev; 348 struct input_dev *dev; 349 char *name; 350 int i, size; 351 int retval; 352 353 if (count != sizeof(struct uinput_user_dev)) 354 return -EINVAL; 355 356 if (!udev->dev) { 357 retval = uinput_allocate_device(udev); 358 if (retval) 359 return retval; 360 } 361 362 dev = udev->dev; 363 364 user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL); 365 if (!user_dev) 366 return -ENOMEM; 367 368 if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) { 369 retval = -EFAULT; 370 goto exit; 371 } 372 373 udev->ff_effects_max = user_dev->ff_effects_max; 374 375 size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1; 376 if (!size) { 377 retval = -EINVAL; 378 goto exit; 379 } 380 381 kfree(dev->name); 382 dev->name = name = kmalloc(size, GFP_KERNEL); 383 if (!name) { 384 retval = -ENOMEM; 385 goto exit; 386 } 387 strlcpy(name, user_dev->name, size); 388 389 dev->id.bustype = user_dev->id.bustype; 390 dev->id.vendor = user_dev->id.vendor; 391 dev->id.product = user_dev->id.product; 392 dev->id.version = user_dev->id.version; 393 394 for (i = 0; i < ABS_CNT; i++) { 395 input_abs_set_max(dev, i, user_dev->absmax[i]); 396 input_abs_set_min(dev, i, user_dev->absmin[i]); 397 input_abs_set_fuzz(dev, i, user_dev->absfuzz[i]); 398 input_abs_set_flat(dev, i, user_dev->absflat[i]); 399 } 400 401 /* check if absmin/absmax/absfuzz/absflat are filled as 402 * told in Documentation/input/input-programming.txt */ 403 if (test_bit(EV_ABS, dev->evbit)) { 404 retval = uinput_validate_absbits(dev); 405 if (retval < 0) 406 goto exit; 407 } 408 409 udev->state = UIST_SETUP_COMPLETE; 410 retval = count; 411 412 exit: 413 kfree(user_dev); 414 return retval; 415 } 416 417 static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) 418 { 419 struct input_event ev; 420 421 if (count < input_event_size()) 422 return -EINVAL; 423 424 if (input_event_from_user(buffer, &ev)) 425 return -EFAULT; 426 427 input_event(udev->dev, ev.type, ev.code, ev.value); 428 429 return input_event_size(); 430 } 431 432 static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) 433 { 434 struct uinput_device *udev = file->private_data; 435 int retval; 436 437 retval = mutex_lock_interruptible(&udev->mutex); 438 if (retval) 439 return retval; 440 441 retval = udev->state == UIST_CREATED ? 442 uinput_inject_event(udev, buffer, count) : 443 uinput_setup_device(udev, buffer, count); 444 445 mutex_unlock(&udev->mutex); 446 447 return retval; 448 } 449 450 static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) 451 { 452 struct uinput_device *udev = file->private_data; 453 int retval = 0; 454 455 if (udev->state != UIST_CREATED) 456 return -ENODEV; 457 458 if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK)) 459 return -EAGAIN; 460 461 retval = wait_event_interruptible(udev->waitq, 462 udev->head != udev->tail || udev->state != UIST_CREATED); 463 if (retval) 464 return retval; 465 466 retval = mutex_lock_interruptible(&udev->mutex); 467 if (retval) 468 return retval; 469 470 if (udev->state != UIST_CREATED) { 471 retval = -ENODEV; 472 goto out; 473 } 474 475 while (udev->head != udev->tail && retval + input_event_size() <= count) { 476 if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) { 477 retval = -EFAULT; 478 goto out; 479 } 480 udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; 481 retval += input_event_size(); 482 } 483 484 out: 485 mutex_unlock(&udev->mutex); 486 487 return retval; 488 } 489 490 static unsigned int uinput_poll(struct file *file, poll_table *wait) 491 { 492 struct uinput_device *udev = file->private_data; 493 494 poll_wait(file, &udev->waitq, wait); 495 496 if (udev->head != udev->tail) 497 return POLLIN | POLLRDNORM; 498 499 return 0; 500 } 501 502 static int uinput_release(struct inode *inode, struct file *file) 503 { 504 struct uinput_device *udev = file->private_data; 505 506 uinput_destroy_device(udev); 507 kfree(udev); 508 509 return 0; 510 } 511 512 #ifdef CONFIG_COMPAT 513 struct uinput_ff_upload_compat { 514 int request_id; 515 int retval; 516 struct ff_effect_compat effect; 517 struct ff_effect_compat old; 518 }; 519 520 static int uinput_ff_upload_to_user(char __user *buffer, 521 const struct uinput_ff_upload *ff_up) 522 { 523 if (INPUT_COMPAT_TEST) { 524 struct uinput_ff_upload_compat ff_up_compat; 525 526 ff_up_compat.request_id = ff_up->request_id; 527 ff_up_compat.retval = ff_up->retval; 528 /* 529 * It so happens that the pointer that gives us the trouble 530 * is the last field in the structure. Since we don't support 531 * custom waveforms in uinput anyway we can just copy the whole 532 * thing (to the compat size) and ignore the pointer. 533 */ 534 memcpy(&ff_up_compat.effect, &ff_up->effect, 535 sizeof(struct ff_effect_compat)); 536 memcpy(&ff_up_compat.old, &ff_up->old, 537 sizeof(struct ff_effect_compat)); 538 539 if (copy_to_user(buffer, &ff_up_compat, 540 sizeof(struct uinput_ff_upload_compat))) 541 return -EFAULT; 542 } else { 543 if (copy_to_user(buffer, ff_up, 544 sizeof(struct uinput_ff_upload))) 545 return -EFAULT; 546 } 547 548 return 0; 549 } 550 551 static int uinput_ff_upload_from_user(const char __user *buffer, 552 struct uinput_ff_upload *ff_up) 553 { 554 if (INPUT_COMPAT_TEST) { 555 struct uinput_ff_upload_compat ff_up_compat; 556 557 if (copy_from_user(&ff_up_compat, buffer, 558 sizeof(struct uinput_ff_upload_compat))) 559 return -EFAULT; 560 561 ff_up->request_id = ff_up_compat.request_id; 562 ff_up->retval = ff_up_compat.retval; 563 memcpy(&ff_up->effect, &ff_up_compat.effect, 564 sizeof(struct ff_effect_compat)); 565 memcpy(&ff_up->old, &ff_up_compat.old, 566 sizeof(struct ff_effect_compat)); 567 568 } else { 569 if (copy_from_user(ff_up, buffer, 570 sizeof(struct uinput_ff_upload))) 571 return -EFAULT; 572 } 573 574 return 0; 575 } 576 577 #else 578 579 static int uinput_ff_upload_to_user(char __user *buffer, 580 const struct uinput_ff_upload *ff_up) 581 { 582 if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload))) 583 return -EFAULT; 584 585 return 0; 586 } 587 588 static int uinput_ff_upload_from_user(const char __user *buffer, 589 struct uinput_ff_upload *ff_up) 590 { 591 if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload))) 592 return -EFAULT; 593 594 return 0; 595 } 596 597 #endif 598 599 #define uinput_set_bit(_arg, _bit, _max) \ 600 ({ \ 601 int __ret = 0; \ 602 if (udev->state == UIST_CREATED) \ 603 __ret = -EINVAL; \ 604 else if ((_arg) > (_max)) \ 605 __ret = -EINVAL; \ 606 else set_bit((_arg), udev->dev->_bit); \ 607 __ret; \ 608 }) 609 610 static long uinput_ioctl_handler(struct file *file, unsigned int cmd, 611 unsigned long arg, void __user *p) 612 { 613 int retval; 614 struct uinput_device *udev = file->private_data; 615 struct uinput_ff_upload ff_up; 616 struct uinput_ff_erase ff_erase; 617 struct uinput_request *req; 618 int length; 619 char *phys; 620 621 retval = mutex_lock_interruptible(&udev->mutex); 622 if (retval) 623 return retval; 624 625 if (!udev->dev) { 626 retval = uinput_allocate_device(udev); 627 if (retval) 628 goto out; 629 } 630 631 switch (cmd) { 632 case UI_DEV_CREATE: 633 retval = uinput_create_device(udev); 634 break; 635 636 case UI_DEV_DESTROY: 637 uinput_destroy_device(udev); 638 break; 639 640 case UI_SET_EVBIT: 641 retval = uinput_set_bit(arg, evbit, EV_MAX); 642 break; 643 644 case UI_SET_KEYBIT: 645 retval = uinput_set_bit(arg, keybit, KEY_MAX); 646 break; 647 648 case UI_SET_RELBIT: 649 retval = uinput_set_bit(arg, relbit, REL_MAX); 650 break; 651 652 case UI_SET_ABSBIT: 653 retval = uinput_set_bit(arg, absbit, ABS_MAX); 654 break; 655 656 case UI_SET_MSCBIT: 657 retval = uinput_set_bit(arg, mscbit, MSC_MAX); 658 break; 659 660 case UI_SET_LEDBIT: 661 retval = uinput_set_bit(arg, ledbit, LED_MAX); 662 break; 663 664 case UI_SET_SNDBIT: 665 retval = uinput_set_bit(arg, sndbit, SND_MAX); 666 break; 667 668 case UI_SET_FFBIT: 669 retval = uinput_set_bit(arg, ffbit, FF_MAX); 670 break; 671 672 case UI_SET_SWBIT: 673 retval = uinput_set_bit(arg, swbit, SW_MAX); 674 break; 675 676 case UI_SET_PHYS: 677 if (udev->state == UIST_CREATED) { 678 retval = -EINVAL; 679 goto out; 680 } 681 length = strnlen_user(p, 1024); 682 if (length <= 0) { 683 retval = -EFAULT; 684 break; 685 } 686 kfree(udev->dev->phys); 687 udev->dev->phys = phys = kmalloc(length, GFP_KERNEL); 688 if (!phys) { 689 retval = -ENOMEM; 690 break; 691 } 692 if (copy_from_user(phys, p, length)) { 693 udev->dev->phys = NULL; 694 kfree(phys); 695 retval = -EFAULT; 696 break; 697 } 698 phys[length - 1] = '\0'; 699 break; 700 701 case UI_BEGIN_FF_UPLOAD: 702 retval = uinput_ff_upload_from_user(p, &ff_up); 703 if (retval) 704 break; 705 706 req = uinput_request_find(udev, ff_up.request_id); 707 if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) { 708 retval = -EINVAL; 709 break; 710 } 711 712 ff_up.retval = 0; 713 ff_up.effect = *req->u.upload.effect; 714 if (req->u.upload.old) 715 ff_up.old = *req->u.upload.old; 716 else 717 memset(&ff_up.old, 0, sizeof(struct ff_effect)); 718 719 retval = uinput_ff_upload_to_user(p, &ff_up); 720 break; 721 722 case UI_BEGIN_FF_ERASE: 723 if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { 724 retval = -EFAULT; 725 break; 726 } 727 728 req = uinput_request_find(udev, ff_erase.request_id); 729 if (!req || req->code != UI_FF_ERASE) { 730 retval = -EINVAL; 731 break; 732 } 733 734 ff_erase.retval = 0; 735 ff_erase.effect_id = req->u.effect_id; 736 if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) { 737 retval = -EFAULT; 738 break; 739 } 740 741 break; 742 743 case UI_END_FF_UPLOAD: 744 retval = uinput_ff_upload_from_user(p, &ff_up); 745 if (retval) 746 break; 747 748 req = uinput_request_find(udev, ff_up.request_id); 749 if (!req || req->code != UI_FF_UPLOAD || 750 !req->u.upload.effect) { 751 retval = -EINVAL; 752 break; 753 } 754 755 req->retval = ff_up.retval; 756 uinput_request_done(udev, req); 757 break; 758 759 case UI_END_FF_ERASE: 760 if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { 761 retval = -EFAULT; 762 break; 763 } 764 765 req = uinput_request_find(udev, ff_erase.request_id); 766 if (!req || req->code != UI_FF_ERASE) { 767 retval = -EINVAL; 768 break; 769 } 770 771 req->retval = ff_erase.retval; 772 uinput_request_done(udev, req); 773 break; 774 775 default: 776 retval = -EINVAL; 777 } 778 779 out: 780 mutex_unlock(&udev->mutex); 781 return retval; 782 } 783 784 static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 785 { 786 return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg); 787 } 788 789 #ifdef CONFIG_COMPAT 790 static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 791 { 792 return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg)); 793 } 794 #endif 795 796 static const struct file_operations uinput_fops = { 797 .owner = THIS_MODULE, 798 .open = uinput_open, 799 .release = uinput_release, 800 .read = uinput_read, 801 .write = uinput_write, 802 .poll = uinput_poll, 803 .unlocked_ioctl = uinput_ioctl, 804 #ifdef CONFIG_COMPAT 805 .compat_ioctl = uinput_compat_ioctl, 806 #endif 807 }; 808 809 static struct miscdevice uinput_misc = { 810 .fops = &uinput_fops, 811 .minor = UINPUT_MINOR, 812 .name = UINPUT_NAME, 813 }; 814 815 static int __init uinput_init(void) 816 { 817 return misc_register(&uinput_misc); 818 } 819 820 static void __exit uinput_exit(void) 821 { 822 misc_deregister(&uinput_misc); 823 } 824 825 MODULE_AUTHOR("Aristeu Sergio Rozanski Filho"); 826 MODULE_DESCRIPTION("User level driver support for input subsystem"); 827 MODULE_LICENSE("GPL"); 828 MODULE_VERSION("0.3"); 829 830 module_init(uinput_init); 831 module_exit(uinput_exit); 832 833