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/smp_lock.h> 23 #include <linux/random.h> 24 #include <linux/major.h> 25 #include <linux/device.h> 26 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 27 #include <linux/miscdevice.h> 28 #endif 29 30 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 31 MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); 32 MODULE_LICENSE("GPL"); 33 34 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X 35 #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024 36 #endif 37 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y 38 #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768 39 #endif 40 41 static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; 42 module_param(xres, uint, 0644); 43 MODULE_PARM_DESC(xres, "Horizontal screen resolution"); 44 45 static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; 46 module_param(yres, uint, 0644); 47 MODULE_PARM_DESC(yres, "Vertical screen resolution"); 48 49 static unsigned tap_time = 200; 50 module_param(tap_time, uint, 0644); 51 MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); 52 53 struct mousedev_hw_data { 54 int dx, dy, dz; 55 int x, y; 56 int abs_event; 57 unsigned long buttons; 58 }; 59 60 struct mousedev { 61 int exist; 62 int open; 63 int minor; 64 char name[16]; 65 wait_queue_head_t wait; 66 struct list_head list; 67 struct input_handle handle; 68 69 struct mousedev_hw_data packet; 70 unsigned int pkt_count; 71 int old_x[4], old_y[4]; 72 int frac_dx, frac_dy; 73 unsigned long touch; 74 }; 75 76 enum mousedev_emul { 77 MOUSEDEV_EMUL_PS2, 78 MOUSEDEV_EMUL_IMPS, 79 MOUSEDEV_EMUL_EXPS 80 }; 81 82 struct mousedev_motion { 83 int dx, dy, dz; 84 unsigned long buttons; 85 }; 86 87 #define PACKET_QUEUE_LEN 16 88 struct mousedev_list { 89 struct fasync_struct *fasync; 90 struct mousedev *mousedev; 91 struct list_head node; 92 93 struct mousedev_motion packets[PACKET_QUEUE_LEN]; 94 unsigned int head, tail; 95 spinlock_t packet_lock; 96 int pos_x, pos_y; 97 98 signed char ps2[6]; 99 unsigned char ready, buffer, bufsiz; 100 unsigned char imexseq, impsseq; 101 enum mousedev_emul mode; 102 unsigned long last_buttons; 103 }; 104 105 #define MOUSEDEV_SEQ_LEN 6 106 107 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; 108 static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; 109 110 static struct input_handler mousedev_handler; 111 112 static struct mousedev *mousedev_table[MOUSEDEV_MINORS]; 113 static struct mousedev mousedev_mix; 114 115 #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03]) 116 #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) 117 118 static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) 119 { 120 int size, tmp; 121 enum { FRACTION_DENOM = 128 }; 122 123 if (mousedev->touch) { 124 size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; 125 if (size == 0) 126 size = 256 * 2; 127 128 switch (code) { 129 case ABS_X: 130 fx(0) = value; 131 if (mousedev->pkt_count >= 2) { 132 tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size; 133 tmp += mousedev->frac_dx; 134 mousedev->packet.dx = tmp / FRACTION_DENOM; 135 mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM; 136 } 137 break; 138 139 case ABS_Y: 140 fy(0) = value; 141 if (mousedev->pkt_count >= 2) { 142 tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size; 143 tmp += mousedev->frac_dy; 144 mousedev->packet.dy = tmp / FRACTION_DENOM; 145 mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM; 146 } 147 break; 148 } 149 } 150 } 151 152 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) 153 { 154 int size; 155 156 switch (code) { 157 case ABS_X: 158 size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; 159 if (size == 0) 160 size = xres ? : 1; 161 if (value > dev->absmax[ABS_X]) 162 value = dev->absmax[ABS_X]; 163 if (value < dev->absmin[ABS_X]) 164 value = dev->absmin[ABS_X]; 165 mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size; 166 mousedev->packet.abs_event = 1; 167 break; 168 169 case ABS_Y: 170 size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y]; 171 if (size == 0) 172 size = yres ? : 1; 173 if (value > dev->absmax[ABS_Y]) 174 value = dev->absmax[ABS_Y]; 175 if (value < dev->absmin[ABS_Y]) 176 value = dev->absmin[ABS_Y]; 177 mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size; 178 mousedev->packet.abs_event = 1; 179 break; 180 } 181 } 182 183 static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value) 184 { 185 switch (code) { 186 case REL_X: mousedev->packet.dx += value; break; 187 case REL_Y: mousedev->packet.dy -= value; break; 188 case REL_WHEEL: mousedev->packet.dz -= value; break; 189 } 190 } 191 192 static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value) 193 { 194 int index; 195 196 switch (code) { 197 case BTN_TOUCH: 198 case BTN_0: 199 case BTN_LEFT: index = 0; break; 200 case BTN_STYLUS: 201 case BTN_1: 202 case BTN_RIGHT: index = 1; break; 203 case BTN_2: 204 case BTN_FORWARD: 205 case BTN_STYLUS2: 206 case BTN_MIDDLE: index = 2; break; 207 case BTN_3: 208 case BTN_BACK: 209 case BTN_SIDE: index = 3; break; 210 case BTN_4: 211 case BTN_EXTRA: index = 4; break; 212 default: return; 213 } 214 215 if (value) { 216 set_bit(index, &mousedev->packet.buttons); 217 set_bit(index, &mousedev_mix.packet.buttons); 218 } else { 219 clear_bit(index, &mousedev->packet.buttons); 220 clear_bit(index, &mousedev_mix.packet.buttons); 221 } 222 } 223 224 static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet) 225 { 226 struct mousedev_list *list; 227 struct mousedev_motion *p; 228 unsigned long flags; 229 int wake_readers = 0; 230 231 list_for_each_entry(list, &mousedev->list, node) { 232 spin_lock_irqsave(&list->packet_lock, flags); 233 234 p = &list->packets[list->head]; 235 if (list->ready && p->buttons != mousedev->packet.buttons) { 236 unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN; 237 if (new_head != list->tail) { 238 p = &list->packets[list->head = new_head]; 239 memset(p, 0, sizeof(struct mousedev_motion)); 240 } 241 } 242 243 if (packet->abs_event) { 244 p->dx += packet->x - list->pos_x; 245 p->dy += packet->y - list->pos_y; 246 list->pos_x = packet->x; 247 list->pos_y = packet->y; 248 } 249 250 list->pos_x += packet->dx; 251 list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x); 252 list->pos_y += packet->dy; 253 list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y); 254 255 p->dx += packet->dx; 256 p->dy += packet->dy; 257 p->dz += packet->dz; 258 p->buttons = mousedev->packet.buttons; 259 260 if (p->dx || p->dy || p->dz || p->buttons != list->last_buttons) 261 list->ready = 1; 262 263 spin_unlock_irqrestore(&list->packet_lock, flags); 264 265 if (list->ready) { 266 kill_fasync(&list->fasync, SIGIO, POLL_IN); 267 wake_readers = 1; 268 } 269 } 270 271 if (wake_readers) 272 wake_up_interruptible(&mousedev->wait); 273 } 274 275 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) 276 { 277 if (!value) { 278 if (mousedev->touch && 279 time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) { 280 /* 281 * Toggle left button to emulate tap. 282 * We rely on the fact that mousedev_mix always has 0 283 * motion packet so we won't mess current position. 284 */ 285 set_bit(0, &mousedev->packet.buttons); 286 set_bit(0, &mousedev_mix.packet.buttons); 287 mousedev_notify_readers(mousedev, &mousedev_mix.packet); 288 mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet); 289 clear_bit(0, &mousedev->packet.buttons); 290 clear_bit(0, &mousedev_mix.packet.buttons); 291 } 292 mousedev->touch = mousedev->pkt_count = 0; 293 mousedev->frac_dx = 0; 294 mousedev->frac_dy = 0; 295 296 } else if (!mousedev->touch) 297 mousedev->touch = jiffies; 298 } 299 300 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) 301 { 302 struct mousedev *mousedev = handle->private; 303 304 switch (type) { 305 case EV_ABS: 306 /* Ignore joysticks */ 307 if (test_bit(BTN_TRIGGER, handle->dev->keybit)) 308 return; 309 310 if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) 311 mousedev_touchpad_event(handle->dev, mousedev, code, value); 312 else 313 mousedev_abs_event(handle->dev, mousedev, code, value); 314 315 break; 316 317 case EV_REL: 318 mousedev_rel_event(mousedev, code, value); 319 break; 320 321 case EV_KEY: 322 if (value != 2) { 323 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) 324 mousedev_touchpad_touch(mousedev, value); 325 else 326 mousedev_key_event(mousedev, code, value); 327 } 328 break; 329 330 case EV_SYN: 331 if (code == SYN_REPORT) { 332 if (mousedev->touch) { 333 mousedev->pkt_count++; 334 /* Input system eats duplicate events, but we need all of them 335 * to do correct averaging so apply present one forward 336 */ 337 fx(0) = fx(1); 338 fy(0) = fy(1); 339 } 340 341 mousedev_notify_readers(mousedev, &mousedev->packet); 342 mousedev_notify_readers(&mousedev_mix, &mousedev->packet); 343 344 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0; 345 mousedev->packet.abs_event = 0; 346 } 347 break; 348 } 349 } 350 351 static int mousedev_fasync(int fd, struct file *file, int on) 352 { 353 int retval; 354 struct mousedev_list *list = file->private_data; 355 356 retval = fasync_helper(fd, file, on, &list->fasync); 357 358 return retval < 0 ? retval : 0; 359 } 360 361 static void mousedev_free(struct mousedev *mousedev) 362 { 363 mousedev_table[mousedev->minor] = NULL; 364 kfree(mousedev); 365 } 366 367 static void mixdev_release(void) 368 { 369 struct input_handle *handle; 370 371 list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { 372 struct mousedev *mousedev = handle->private; 373 374 if (!mousedev->open) { 375 if (mousedev->exist) 376 input_close_device(&mousedev->handle); 377 else 378 mousedev_free(mousedev); 379 } 380 } 381 } 382 383 static int mousedev_release(struct inode * inode, struct file * file) 384 { 385 struct mousedev_list *list = file->private_data; 386 387 mousedev_fasync(-1, file, 0); 388 389 list_del(&list->node); 390 391 if (!--list->mousedev->open) { 392 if (list->mousedev->minor == MOUSEDEV_MIX) 393 mixdev_release(); 394 else if (!mousedev_mix.open) { 395 if (list->mousedev->exist) 396 input_close_device(&list->mousedev->handle); 397 else 398 mousedev_free(list->mousedev); 399 } 400 } 401 402 kfree(list); 403 return 0; 404 } 405 406 static int mousedev_open(struct inode * inode, struct file * file) 407 { 408 struct mousedev_list *list; 409 struct input_handle *handle; 410 struct mousedev *mousedev; 411 int i; 412 413 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 414 if (imajor(inode) == MISC_MAJOR) 415 i = MOUSEDEV_MIX; 416 else 417 #endif 418 i = iminor(inode) - MOUSEDEV_MINOR_BASE; 419 420 if (i >= MOUSEDEV_MINORS || !mousedev_table[i]) 421 return -ENODEV; 422 423 if (!(list = kzalloc(sizeof(struct mousedev_list), GFP_KERNEL))) 424 return -ENOMEM; 425 426 spin_lock_init(&list->packet_lock); 427 list->pos_x = xres / 2; 428 list->pos_y = yres / 2; 429 list->mousedev = mousedev_table[i]; 430 list_add_tail(&list->node, &mousedev_table[i]->list); 431 file->private_data = list; 432 433 if (!list->mousedev->open++) { 434 if (list->mousedev->minor == MOUSEDEV_MIX) { 435 list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { 436 mousedev = handle->private; 437 if (!mousedev->open && mousedev->exist) 438 input_open_device(handle); 439 } 440 } else 441 if (!mousedev_mix.open && list->mousedev->exist) 442 input_open_device(&list->mousedev->handle); 443 } 444 445 return 0; 446 } 447 448 static inline int mousedev_limit_delta(int delta, int limit) 449 { 450 return delta > limit ? limit : (delta < -limit ? -limit : delta); 451 } 452 453 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data) 454 { 455 struct mousedev_motion *p; 456 unsigned long flags; 457 458 spin_lock_irqsave(&list->packet_lock, flags); 459 p = &list->packets[list->tail]; 460 461 ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); 462 ps2_data[1] = mousedev_limit_delta(p->dx, 127); 463 ps2_data[2] = mousedev_limit_delta(p->dy, 127); 464 p->dx -= ps2_data[1]; 465 p->dy -= ps2_data[2]; 466 467 switch (list->mode) { 468 case MOUSEDEV_EMUL_EXPS: 469 ps2_data[3] = mousedev_limit_delta(p->dz, 7); 470 p->dz -= ps2_data[3]; 471 ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); 472 list->bufsiz = 4; 473 break; 474 475 case MOUSEDEV_EMUL_IMPS: 476 ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); 477 ps2_data[3] = mousedev_limit_delta(p->dz, 127); 478 p->dz -= ps2_data[3]; 479 list->bufsiz = 4; 480 break; 481 482 case MOUSEDEV_EMUL_PS2: 483 default: 484 ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); 485 p->dz = 0; 486 list->bufsiz = 3; 487 break; 488 } 489 490 if (!p->dx && !p->dy && !p->dz) { 491 if (list->tail == list->head) { 492 list->ready = 0; 493 list->last_buttons = p->buttons; 494 } else 495 list->tail = (list->tail + 1) % PACKET_QUEUE_LEN; 496 } 497 498 spin_unlock_irqrestore(&list->packet_lock, flags); 499 } 500 501 502 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos) 503 { 504 struct mousedev_list *list = file->private_data; 505 unsigned char c; 506 unsigned int i; 507 508 for (i = 0; i < count; i++) { 509 510 if (get_user(c, buffer + i)) 511 return -EFAULT; 512 513 if (c == mousedev_imex_seq[list->imexseq]) { 514 if (++list->imexseq == MOUSEDEV_SEQ_LEN) { 515 list->imexseq = 0; 516 list->mode = MOUSEDEV_EMUL_EXPS; 517 } 518 } else 519 list->imexseq = 0; 520 521 if (c == mousedev_imps_seq[list->impsseq]) { 522 if (++list->impsseq == MOUSEDEV_SEQ_LEN) { 523 list->impsseq = 0; 524 list->mode = MOUSEDEV_EMUL_IMPS; 525 } 526 } else 527 list->impsseq = 0; 528 529 list->ps2[0] = 0xfa; 530 531 switch (c) { 532 533 case 0xeb: /* Poll */ 534 mousedev_packet(list, &list->ps2[1]); 535 list->bufsiz++; /* account for leading ACK */ 536 break; 537 538 case 0xf2: /* Get ID */ 539 switch (list->mode) { 540 case MOUSEDEV_EMUL_PS2: list->ps2[1] = 0; break; 541 case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break; 542 case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break; 543 } 544 list->bufsiz = 2; 545 break; 546 547 case 0xe9: /* Get info */ 548 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200; 549 list->bufsiz = 4; 550 break; 551 552 case 0xff: /* Reset */ 553 list->impsseq = list->imexseq = 0; 554 list->mode = MOUSEDEV_EMUL_PS2; 555 list->ps2[1] = 0xaa; list->ps2[2] = 0x00; 556 list->bufsiz = 3; 557 break; 558 559 default: 560 list->bufsiz = 1; 561 break; 562 } 563 564 list->buffer = list->bufsiz; 565 } 566 567 kill_fasync(&list->fasync, SIGIO, POLL_IN); 568 569 wake_up_interruptible(&list->mousedev->wait); 570 571 return count; 572 } 573 574 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos) 575 { 576 struct mousedev_list *list = file->private_data; 577 int retval = 0; 578 579 if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK)) 580 return -EAGAIN; 581 582 retval = wait_event_interruptible(list->mousedev->wait, 583 !list->mousedev->exist || list->ready || list->buffer); 584 585 if (retval) 586 return retval; 587 588 if (!list->mousedev->exist) 589 return -ENODEV; 590 591 if (!list->buffer && list->ready) { 592 mousedev_packet(list, list->ps2); 593 list->buffer = list->bufsiz; 594 } 595 596 if (count > list->buffer) 597 count = list->buffer; 598 599 list->buffer -= count; 600 601 if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count)) 602 return -EFAULT; 603 604 return count; 605 } 606 607 /* No kernel lock - fine */ 608 static unsigned int mousedev_poll(struct file *file, poll_table *wait) 609 { 610 struct mousedev_list *list = file->private_data; 611 612 poll_wait(file, &list->mousedev->wait, wait); 613 return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) | 614 (list->mousedev->exist ? 0 : (POLLHUP | POLLERR)); 615 } 616 617 static const struct file_operations mousedev_fops = { 618 .owner = THIS_MODULE, 619 .read = mousedev_read, 620 .write = mousedev_write, 621 .poll = mousedev_poll, 622 .open = mousedev_open, 623 .release = mousedev_release, 624 .fasync = mousedev_fasync, 625 }; 626 627 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, 628 const struct input_device_id *id) 629 { 630 struct mousedev *mousedev; 631 struct class_device *cdev; 632 int minor = 0; 633 634 for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++); 635 if (minor == MOUSEDEV_MINORS) { 636 printk(KERN_ERR "mousedev: no more free mousedev devices\n"); 637 return NULL; 638 } 639 640 if (!(mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL))) 641 return NULL; 642 643 INIT_LIST_HEAD(&mousedev->list); 644 init_waitqueue_head(&mousedev->wait); 645 646 mousedev->minor = minor; 647 mousedev->exist = 1; 648 mousedev->handle.dev = dev; 649 mousedev->handle.name = mousedev->name; 650 mousedev->handle.handler = handler; 651 mousedev->handle.private = mousedev; 652 sprintf(mousedev->name, "mouse%d", minor); 653 654 if (mousedev_mix.open) 655 input_open_device(&mousedev->handle); 656 657 mousedev_table[minor] = mousedev; 658 659 cdev = class_device_create(&input_class, &dev->cdev, 660 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor), 661 dev->cdev.dev, mousedev->name); 662 663 /* temporary symlink to keep userspace happy */ 664 sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj, 665 mousedev->name); 666 667 return &mousedev->handle; 668 } 669 670 static void mousedev_disconnect(struct input_handle *handle) 671 { 672 struct mousedev *mousedev = handle->private; 673 struct mousedev_list *list; 674 675 sysfs_remove_link(&input_class.subsys.kset.kobj, mousedev->name); 676 class_device_destroy(&input_class, 677 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor)); 678 mousedev->exist = 0; 679 680 if (mousedev->open) { 681 input_close_device(handle); 682 wake_up_interruptible(&mousedev->wait); 683 list_for_each_entry(list, &mousedev->list, node) 684 kill_fasync(&list->fasync, SIGIO, POLL_HUP); 685 } else { 686 if (mousedev_mix.open) 687 input_close_device(handle); 688 mousedev_free(mousedev); 689 } 690 } 691 692 static const struct input_device_id mousedev_ids[] = { 693 { 694 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT, 695 .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, 696 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) }, 697 .relbit = { BIT(REL_X) | BIT(REL_Y) }, 698 }, /* A mouse like device, at least one button, two relative axes */ 699 { 700 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT, 701 .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, 702 .relbit = { BIT(REL_WHEEL) }, 703 }, /* A separate scrollwheel */ 704 { 705 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, 706 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, 707 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, 708 .absbit = { BIT(ABS_X) | BIT(ABS_Y) }, 709 }, /* A tablet like device, at least touch detection, two absolute axes */ 710 { 711 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, 712 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, 713 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) }, 714 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) }, 715 }, /* A touchpad */ 716 717 { }, /* Terminating entry */ 718 }; 719 720 MODULE_DEVICE_TABLE(input, mousedev_ids); 721 722 static struct input_handler mousedev_handler = { 723 .event = mousedev_event, 724 .connect = mousedev_connect, 725 .disconnect = mousedev_disconnect, 726 .fops = &mousedev_fops, 727 .minor = MOUSEDEV_MINOR_BASE, 728 .name = "mousedev", 729 .id_table = mousedev_ids, 730 }; 731 732 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 733 static struct miscdevice psaux_mouse = { 734 PSMOUSE_MINOR, "psaux", &mousedev_fops 735 }; 736 static int psaux_registered; 737 #endif 738 739 static int __init mousedev_init(void) 740 { 741 struct class_device *cdev; 742 int error; 743 744 error = input_register_handler(&mousedev_handler); 745 if (error) 746 return error; 747 748 memset(&mousedev_mix, 0, sizeof(struct mousedev)); 749 INIT_LIST_HEAD(&mousedev_mix.list); 750 init_waitqueue_head(&mousedev_mix.wait); 751 mousedev_table[MOUSEDEV_MIX] = &mousedev_mix; 752 mousedev_mix.exist = 1; 753 mousedev_mix.minor = MOUSEDEV_MIX; 754 755 cdev = class_device_create(&input_class, NULL, 756 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), NULL, "mice"); 757 if (IS_ERR(cdev)) { 758 input_unregister_handler(&mousedev_handler); 759 return PTR_ERR(cdev); 760 } 761 762 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 763 error = misc_register(&psaux_mouse); 764 if (error) 765 printk(KERN_WARNING "mice: could not register psaux device, " 766 "error: %d\n", error); 767 else 768 psaux_registered = 1; 769 #endif 770 771 printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n"); 772 773 return 0; 774 } 775 776 static void __exit mousedev_exit(void) 777 { 778 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 779 if (psaux_registered) 780 misc_deregister(&psaux_mouse); 781 #endif 782 class_device_destroy(&input_class, 783 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX)); 784 input_unregister_handler(&mousedev_handler); 785 } 786 787 module_init(mousedev_init); 788 module_exit(mousedev_exit); 789