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