1 /* 2 * Input driver to ExplorerPS/2 device driver module. 3 * 4 * Copyright (c) 1999-2002 Vojtech Pavlik 5 * Copyright (c) 2004 Dmitry Torokhov 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as published by 9 * the Free Software Foundation. 10 */ 11 12 #define MOUSEDEV_MINOR_BASE 32 13 #define MOUSEDEV_MINORS 32 14 #define MOUSEDEV_MIX 31 15 16 #include <linux/slab.h> 17 #include <linux/poll.h> 18 #include <linux/module.h> 19 #include <linux/moduleparam.h> 20 #include <linux/init.h> 21 #include <linux/input.h> 22 #include <linux/config.h> 23 #include <linux/smp_lock.h> 24 #include <linux/random.h> 25 #include <linux/major.h> 26 #include <linux/device.h> 27 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 28 #include <linux/miscdevice.h> 29 #endif 30 31 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 32 MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); 33 MODULE_LICENSE("GPL"); 34 35 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X 36 #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024 37 #endif 38 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y 39 #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768 40 #endif 41 42 static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; 43 module_param(xres, uint, 0644); 44 MODULE_PARM_DESC(xres, "Horizontal screen resolution"); 45 46 static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; 47 module_param(yres, uint, 0644); 48 MODULE_PARM_DESC(yres, "Vertical screen resolution"); 49 50 static unsigned tap_time = 200; 51 module_param(tap_time, uint, 0644); 52 MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); 53 54 struct mousedev_hw_data { 55 int dx, dy, dz; 56 int x, y; 57 int abs_event; 58 unsigned long buttons; 59 }; 60 61 struct mousedev { 62 int exist; 63 int open; 64 int minor; 65 char name[16]; 66 wait_queue_head_t wait; 67 struct list_head list; 68 struct input_handle handle; 69 70 struct mousedev_hw_data packet; 71 unsigned int pkt_count; 72 int old_x[4], old_y[4]; 73 int frac_dx, frac_dy; 74 unsigned long touch; 75 }; 76 77 enum mousedev_emul { 78 MOUSEDEV_EMUL_PS2, 79 MOUSEDEV_EMUL_IMPS, 80 MOUSEDEV_EMUL_EXPS 81 }; 82 83 struct mousedev_motion { 84 int dx, dy, dz; 85 unsigned long buttons; 86 }; 87 88 #define PACKET_QUEUE_LEN 16 89 struct mousedev_list { 90 struct fasync_struct *fasync; 91 struct mousedev *mousedev; 92 struct list_head node; 93 94 struct mousedev_motion packets[PACKET_QUEUE_LEN]; 95 unsigned int head, tail; 96 spinlock_t packet_lock; 97 int pos_x, pos_y; 98 99 signed char ps2[6]; 100 unsigned char ready, buffer, bufsiz; 101 unsigned char imexseq, impsseq; 102 enum mousedev_emul mode; 103 unsigned long last_buttons; 104 }; 105 106 #define MOUSEDEV_SEQ_LEN 6 107 108 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; 109 static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; 110 111 static struct input_handler mousedev_handler; 112 113 static struct mousedev *mousedev_table[MOUSEDEV_MINORS]; 114 static struct mousedev mousedev_mix; 115 116 #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03]) 117 #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) 118 119 static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) 120 { 121 int size, tmp; 122 enum { FRACTION_DENOM = 128 }; 123 124 if (mousedev->touch) { 125 size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; 126 if (size == 0) size = 256 * 2; 127 switch (code) { 128 case ABS_X: 129 fx(0) = value; 130 if (mousedev->pkt_count >= 2) { 131 tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size; 132 tmp += mousedev->frac_dx; 133 mousedev->packet.dx = tmp / FRACTION_DENOM; 134 mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM; 135 } 136 break; 137 138 case ABS_Y: 139 fy(0) = value; 140 if (mousedev->pkt_count >= 2) { 141 tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size; 142 tmp += mousedev->frac_dy; 143 mousedev->packet.dy = tmp / FRACTION_DENOM; 144 mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM; 145 } 146 break; 147 } 148 } 149 } 150 151 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) 152 { 153 int size; 154 155 switch (code) { 156 case ABS_X: 157 size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; 158 if (size == 0) size = xres ? : 1; 159 if (value > dev->absmax[ABS_X]) value = dev->absmax[ABS_X]; 160 if (value < dev->absmin[ABS_X]) value = dev->absmin[ABS_X]; 161 mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size; 162 mousedev->packet.abs_event = 1; 163 break; 164 165 case ABS_Y: 166 size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y]; 167 if (size == 0) size = yres ? : 1; 168 if (value > dev->absmax[ABS_Y]) value = dev->absmax[ABS_Y]; 169 if (value < dev->absmin[ABS_Y]) value = dev->absmin[ABS_Y]; 170 mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size; 171 mousedev->packet.abs_event = 1; 172 break; 173 } 174 } 175 176 static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value) 177 { 178 switch (code) { 179 case REL_X: mousedev->packet.dx += value; break; 180 case REL_Y: mousedev->packet.dy -= value; break; 181 case REL_WHEEL: mousedev->packet.dz -= value; break; 182 } 183 } 184 185 static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value) 186 { 187 int index; 188 189 switch (code) { 190 case BTN_TOUCH: 191 case BTN_0: 192 case BTN_FORWARD: 193 case BTN_LEFT: index = 0; break; 194 case BTN_STYLUS: 195 case BTN_1: 196 case BTN_RIGHT: index = 1; break; 197 case BTN_2: 198 case BTN_STYLUS2: 199 case BTN_MIDDLE: index = 2; break; 200 case BTN_3: 201 case BTN_BACK: 202 case BTN_SIDE: index = 3; break; 203 case BTN_4: 204 case BTN_EXTRA: index = 4; break; 205 default: return; 206 } 207 208 if (value) { 209 set_bit(index, &mousedev->packet.buttons); 210 set_bit(index, &mousedev_mix.packet.buttons); 211 } else { 212 clear_bit(index, &mousedev->packet.buttons); 213 clear_bit(index, &mousedev_mix.packet.buttons); 214 } 215 } 216 217 static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet) 218 { 219 struct mousedev_list *list; 220 struct mousedev_motion *p; 221 unsigned long flags; 222 int wake_readers = 0; 223 224 list_for_each_entry(list, &mousedev->list, node) { 225 spin_lock_irqsave(&list->packet_lock, flags); 226 227 p = &list->packets[list->head]; 228 if (list->ready && p->buttons != mousedev->packet.buttons) { 229 unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN; 230 if (new_head != list->tail) { 231 p = &list->packets[list->head = new_head]; 232 memset(p, 0, sizeof(struct mousedev_motion)); 233 } 234 } 235 236 if (packet->abs_event) { 237 p->dx += packet->x - list->pos_x; 238 p->dy += packet->y - list->pos_y; 239 list->pos_x = packet->x; 240 list->pos_y = packet->y; 241 } 242 243 list->pos_x += packet->dx; 244 list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x); 245 list->pos_y += packet->dy; 246 list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y); 247 248 p->dx += packet->dx; 249 p->dy += packet->dy; 250 p->dz += packet->dz; 251 p->buttons = mousedev->packet.buttons; 252 253 if (p->dx || p->dy || p->dz || p->buttons != list->last_buttons) 254 list->ready = 1; 255 256 spin_unlock_irqrestore(&list->packet_lock, flags); 257 258 if (list->ready) { 259 kill_fasync(&list->fasync, SIGIO, POLL_IN); 260 wake_readers = 1; 261 } 262 } 263 264 if (wake_readers) 265 wake_up_interruptible(&mousedev->wait); 266 } 267 268 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) 269 { 270 if (!value) { 271 if (mousedev->touch && 272 time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) { 273 /* 274 * Toggle left button to emulate tap. 275 * We rely on the fact that mousedev_mix always has 0 276 * motion packet so we won't mess current position. 277 */ 278 set_bit(0, &mousedev->packet.buttons); 279 set_bit(0, &mousedev_mix.packet.buttons); 280 mousedev_notify_readers(mousedev, &mousedev_mix.packet); 281 mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet); 282 clear_bit(0, &mousedev->packet.buttons); 283 clear_bit(0, &mousedev_mix.packet.buttons); 284 } 285 mousedev->touch = mousedev->pkt_count = 0; 286 mousedev->frac_dx = 0; 287 mousedev->frac_dy = 0; 288 } 289 else 290 if (!mousedev->touch) 291 mousedev->touch = jiffies; 292 } 293 294 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) 295 { 296 struct mousedev *mousedev = handle->private; 297 298 switch (type) { 299 case EV_ABS: 300 /* Ignore joysticks */ 301 if (test_bit(BTN_TRIGGER, handle->dev->keybit)) 302 return; 303 304 if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) 305 mousedev_touchpad_event(handle->dev, mousedev, code, value); 306 else 307 mousedev_abs_event(handle->dev, mousedev, code, value); 308 309 break; 310 311 case EV_REL: 312 mousedev_rel_event(mousedev, code, value); 313 break; 314 315 case EV_KEY: 316 if (value != 2) { 317 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) 318 mousedev_touchpad_touch(mousedev, value); 319 else 320 mousedev_key_event(mousedev, code, value); 321 } 322 break; 323 324 case EV_SYN: 325 if (code == SYN_REPORT) { 326 if (mousedev->touch) { 327 mousedev->pkt_count++; 328 /* Input system eats duplicate events, but we need all of them 329 * to do correct averaging so apply present one forward 330 */ 331 fx(0) = fx(1); 332 fy(0) = fy(1); 333 } 334 335 mousedev_notify_readers(mousedev, &mousedev->packet); 336 mousedev_notify_readers(&mousedev_mix, &mousedev->packet); 337 338 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0; 339 mousedev->packet.abs_event = 0; 340 } 341 break; 342 } 343 } 344 345 static int mousedev_fasync(int fd, struct file *file, int on) 346 { 347 int retval; 348 struct mousedev_list *list = file->private_data; 349 retval = fasync_helper(fd, file, on, &list->fasync); 350 return retval < 0 ? retval : 0; 351 } 352 353 static void mousedev_free(struct mousedev *mousedev) 354 { 355 mousedev_table[mousedev->minor] = NULL; 356 kfree(mousedev); 357 } 358 359 static void mixdev_release(void) 360 { 361 struct input_handle *handle; 362 363 list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { 364 struct mousedev *mousedev = handle->private; 365 366 if (!mousedev->open) { 367 if (mousedev->exist) 368 input_close_device(&mousedev->handle); 369 else 370 mousedev_free(mousedev); 371 } 372 } 373 } 374 375 static int mousedev_release(struct inode * inode, struct file * file) 376 { 377 struct mousedev_list *list = file->private_data; 378 379 mousedev_fasync(-1, file, 0); 380 381 list_del(&list->node); 382 383 if (!--list->mousedev->open) { 384 if (list->mousedev->minor == MOUSEDEV_MIX) 385 mixdev_release(); 386 else if (!mousedev_mix.open) { 387 if (list->mousedev->exist) 388 input_close_device(&list->mousedev->handle); 389 else 390 mousedev_free(list->mousedev); 391 } 392 } 393 394 kfree(list); 395 return 0; 396 } 397 398 static int mousedev_open(struct inode * inode, struct file * file) 399 { 400 struct mousedev_list *list; 401 struct input_handle *handle; 402 struct mousedev *mousedev; 403 int i; 404 405 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 406 if (imajor(inode) == MISC_MAJOR) 407 i = MOUSEDEV_MIX; 408 else 409 #endif 410 i = iminor(inode) - MOUSEDEV_MINOR_BASE; 411 412 if (i >= MOUSEDEV_MINORS || !mousedev_table[i]) 413 return -ENODEV; 414 415 if (!(list = kzalloc(sizeof(struct mousedev_list), GFP_KERNEL))) 416 return -ENOMEM; 417 418 spin_lock_init(&list->packet_lock); 419 list->pos_x = xres / 2; 420 list->pos_y = yres / 2; 421 list->mousedev = mousedev_table[i]; 422 list_add_tail(&list->node, &mousedev_table[i]->list); 423 file->private_data = list; 424 425 if (!list->mousedev->open++) { 426 if (list->mousedev->minor == MOUSEDEV_MIX) { 427 list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { 428 mousedev = handle->private; 429 if (!mousedev->open && mousedev->exist) 430 input_open_device(handle); 431 } 432 } else 433 if (!mousedev_mix.open && list->mousedev->exist) 434 input_open_device(&list->mousedev->handle); 435 } 436 437 return 0; 438 } 439 440 static inline int mousedev_limit_delta(int delta, int limit) 441 { 442 return delta > limit ? limit : (delta < -limit ? -limit : delta); 443 } 444 445 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data) 446 { 447 struct mousedev_motion *p; 448 unsigned long flags; 449 450 spin_lock_irqsave(&list->packet_lock, flags); 451 p = &list->packets[list->tail]; 452 453 ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); 454 ps2_data[1] = mousedev_limit_delta(p->dx, 127); 455 ps2_data[2] = mousedev_limit_delta(p->dy, 127); 456 p->dx -= ps2_data[1]; 457 p->dy -= ps2_data[2]; 458 459 switch (list->mode) { 460 case MOUSEDEV_EMUL_EXPS: 461 ps2_data[3] = mousedev_limit_delta(p->dz, 7); 462 p->dz -= ps2_data[3]; 463 ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); 464 list->bufsiz = 4; 465 break; 466 467 case MOUSEDEV_EMUL_IMPS: 468 ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); 469 ps2_data[3] = mousedev_limit_delta(p->dz, 127); 470 p->dz -= ps2_data[3]; 471 list->bufsiz = 4; 472 break; 473 474 case MOUSEDEV_EMUL_PS2: 475 default: 476 ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); 477 p->dz = 0; 478 list->bufsiz = 3; 479 break; 480 } 481 482 if (!p->dx && !p->dy && !p->dz) { 483 if (list->tail == list->head) { 484 list->ready = 0; 485 list->last_buttons = p->buttons; 486 } else 487 list->tail = (list->tail + 1) % PACKET_QUEUE_LEN; 488 } 489 490 spin_unlock_irqrestore(&list->packet_lock, flags); 491 } 492 493 494 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos) 495 { 496 struct mousedev_list *list = file->private_data; 497 unsigned char c; 498 unsigned int i; 499 500 for (i = 0; i < count; i++) { 501 502 if (get_user(c, buffer + i)) 503 return -EFAULT; 504 505 if (c == mousedev_imex_seq[list->imexseq]) { 506 if (++list->imexseq == MOUSEDEV_SEQ_LEN) { 507 list->imexseq = 0; 508 list->mode = MOUSEDEV_EMUL_EXPS; 509 } 510 } else list->imexseq = 0; 511 512 if (c == mousedev_imps_seq[list->impsseq]) { 513 if (++list->impsseq == MOUSEDEV_SEQ_LEN) { 514 list->impsseq = 0; 515 list->mode = MOUSEDEV_EMUL_IMPS; 516 } 517 } else list->impsseq = 0; 518 519 list->ps2[0] = 0xfa; 520 521 switch (c) { 522 523 case 0xeb: /* Poll */ 524 mousedev_packet(list, &list->ps2[1]); 525 list->bufsiz++; /* account for leading ACK */ 526 break; 527 528 case 0xf2: /* Get ID */ 529 switch (list->mode) { 530 case MOUSEDEV_EMUL_PS2: list->ps2[1] = 0; break; 531 case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break; 532 case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break; 533 } 534 list->bufsiz = 2; 535 break; 536 537 case 0xe9: /* Get info */ 538 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200; 539 list->bufsiz = 4; 540 break; 541 542 case 0xff: /* Reset */ 543 list->impsseq = list->imexseq = 0; 544 list->mode = MOUSEDEV_EMUL_PS2; 545 list->ps2[1] = 0xaa; list->ps2[2] = 0x00; 546 list->bufsiz = 3; 547 break; 548 549 default: 550 list->bufsiz = 1; 551 break; 552 } 553 554 list->buffer = list->bufsiz; 555 } 556 557 kill_fasync(&list->fasync, SIGIO, POLL_IN); 558 559 wake_up_interruptible(&list->mousedev->wait); 560 561 return count; 562 } 563 564 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos) 565 { 566 struct mousedev_list *list = file->private_data; 567 int retval = 0; 568 569 if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK)) 570 return -EAGAIN; 571 572 retval = wait_event_interruptible(list->mousedev->wait, 573 !list->mousedev->exist || list->ready || list->buffer); 574 575 if (retval) 576 return retval; 577 578 if (!list->mousedev->exist) 579 return -ENODEV; 580 581 if (!list->buffer && list->ready) { 582 mousedev_packet(list, list->ps2); 583 list->buffer = list->bufsiz; 584 } 585 586 if (count > list->buffer) 587 count = list->buffer; 588 589 list->buffer -= count; 590 591 if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count)) 592 return -EFAULT; 593 594 return count; 595 } 596 597 /* No kernel lock - fine */ 598 static unsigned int mousedev_poll(struct file *file, poll_table *wait) 599 { 600 struct mousedev_list *list = file->private_data; 601 poll_wait(file, &list->mousedev->wait, wait); 602 return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) | 603 (list->mousedev->exist ? 0 : (POLLHUP | POLLERR)); 604 } 605 606 static struct file_operations mousedev_fops = { 607 .owner = THIS_MODULE, 608 .read = mousedev_read, 609 .write = mousedev_write, 610 .poll = mousedev_poll, 611 .open = mousedev_open, 612 .release = mousedev_release, 613 .fasync = mousedev_fasync, 614 }; 615 616 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id) 617 { 618 struct mousedev *mousedev; 619 struct class_device *cdev; 620 int minor = 0; 621 622 for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++); 623 if (minor == MOUSEDEV_MINORS) { 624 printk(KERN_ERR "mousedev: no more free mousedev devices\n"); 625 return NULL; 626 } 627 628 if (!(mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL))) 629 return NULL; 630 631 INIT_LIST_HEAD(&mousedev->list); 632 init_waitqueue_head(&mousedev->wait); 633 634 mousedev->minor = minor; 635 mousedev->exist = 1; 636 mousedev->handle.dev = dev; 637 mousedev->handle.name = mousedev->name; 638 mousedev->handle.handler = handler; 639 mousedev->handle.private = mousedev; 640 sprintf(mousedev->name, "mouse%d", minor); 641 642 if (mousedev_mix.open) 643 input_open_device(&mousedev->handle); 644 645 mousedev_table[minor] = mousedev; 646 647 cdev = class_device_create(&input_class, &dev->cdev, 648 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor), 649 dev->cdev.dev, mousedev->name); 650 651 /* temporary symlink to keep userspace happy */ 652 sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj, 653 mousedev->name); 654 655 return &mousedev->handle; 656 } 657 658 static void mousedev_disconnect(struct input_handle *handle) 659 { 660 struct mousedev *mousedev = handle->private; 661 struct mousedev_list *list; 662 663 sysfs_remove_link(&input_class.subsys.kset.kobj, mousedev->name); 664 class_device_destroy(&input_class, 665 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor)); 666 mousedev->exist = 0; 667 668 if (mousedev->open) { 669 input_close_device(handle); 670 wake_up_interruptible(&mousedev->wait); 671 list_for_each_entry(list, &mousedev->list, node) 672 kill_fasync(&list->fasync, SIGIO, POLL_HUP); 673 } else { 674 if (mousedev_mix.open) 675 input_close_device(handle); 676 mousedev_free(mousedev); 677 } 678 } 679 680 static struct input_device_id mousedev_ids[] = { 681 { 682 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT, 683 .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, 684 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) }, 685 .relbit = { BIT(REL_X) | BIT(REL_Y) }, 686 }, /* A mouse like device, at least one button, two relative axes */ 687 { 688 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT, 689 .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, 690 .relbit = { BIT(REL_WHEEL) }, 691 }, /* A separate scrollwheel */ 692 { 693 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, 694 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, 695 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, 696 .absbit = { BIT(ABS_X) | BIT(ABS_Y) }, 697 }, /* A tablet like device, at least touch detection, two absolute axes */ 698 { 699 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, 700 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, 701 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) }, 702 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) }, 703 }, /* A touchpad */ 704 705 { }, /* Terminating entry */ 706 }; 707 708 MODULE_DEVICE_TABLE(input, mousedev_ids); 709 710 static struct input_handler mousedev_handler = { 711 .event = mousedev_event, 712 .connect = mousedev_connect, 713 .disconnect = mousedev_disconnect, 714 .fops = &mousedev_fops, 715 .minor = MOUSEDEV_MINOR_BASE, 716 .name = "mousedev", 717 .id_table = mousedev_ids, 718 }; 719 720 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 721 static struct miscdevice psaux_mouse = { 722 PSMOUSE_MINOR, "psaux", &mousedev_fops 723 }; 724 static int psaux_registered; 725 #endif 726 727 static int __init mousedev_init(void) 728 { 729 input_register_handler(&mousedev_handler); 730 731 memset(&mousedev_mix, 0, sizeof(struct mousedev)); 732 INIT_LIST_HEAD(&mousedev_mix.list); 733 init_waitqueue_head(&mousedev_mix.wait); 734 mousedev_table[MOUSEDEV_MIX] = &mousedev_mix; 735 mousedev_mix.exist = 1; 736 mousedev_mix.minor = MOUSEDEV_MIX; 737 738 class_device_create(&input_class, NULL, 739 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), NULL, "mice"); 740 741 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 742 if (!(psaux_registered = !misc_register(&psaux_mouse))) 743 printk(KERN_WARNING "mice: could not misc_register the device\n"); 744 #endif 745 746 printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n"); 747 748 return 0; 749 } 750 751 static void __exit mousedev_exit(void) 752 { 753 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 754 if (psaux_registered) 755 misc_deregister(&psaux_mouse); 756 #endif 757 class_device_destroy(&input_class, 758 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX)); 759 input_unregister_handler(&mousedev_handler); 760 } 761 762 module_init(mousedev_init); 763 module_exit(mousedev_exit); 764