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; 223 224 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 } 261 262 wake_up_interruptible(&mousedev->wait); 263 } 264 265 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) 266 { 267 if (!value) { 268 if (mousedev->touch && 269 time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) { 270 /* 271 * Toggle left button to emulate tap. 272 * We rely on the fact that mousedev_mix always has 0 273 * motion packet so we won't mess current position. 274 */ 275 set_bit(0, &mousedev->packet.buttons); 276 set_bit(0, &mousedev_mix.packet.buttons); 277 mousedev_notify_readers(mousedev, &mousedev_mix.packet); 278 mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet); 279 clear_bit(0, &mousedev->packet.buttons); 280 clear_bit(0, &mousedev_mix.packet.buttons); 281 } 282 mousedev->touch = mousedev->pkt_count = 0; 283 mousedev->frac_dx = 0; 284 mousedev->frac_dy = 0; 285 } 286 else 287 if (!mousedev->touch) 288 mousedev->touch = jiffies; 289 } 290 291 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) 292 { 293 struct mousedev *mousedev = handle->private; 294 295 switch (type) { 296 case EV_ABS: 297 /* Ignore joysticks */ 298 if (test_bit(BTN_TRIGGER, handle->dev->keybit)) 299 return; 300 301 if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) 302 mousedev_touchpad_event(handle->dev, mousedev, code, value); 303 else 304 mousedev_abs_event(handle->dev, mousedev, code, value); 305 306 break; 307 308 case EV_REL: 309 mousedev_rel_event(mousedev, code, value); 310 break; 311 312 case EV_KEY: 313 if (value != 2) { 314 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) 315 mousedev_touchpad_touch(mousedev, value); 316 else 317 mousedev_key_event(mousedev, code, value); 318 } 319 break; 320 321 case EV_SYN: 322 if (code == SYN_REPORT) { 323 if (mousedev->touch) { 324 mousedev->pkt_count++; 325 /* Input system eats duplicate events, but we need all of them 326 * to do correct averaging so apply present one forward 327 */ 328 fx(0) = fx(1); 329 fy(0) = fy(1); 330 } 331 332 mousedev_notify_readers(mousedev, &mousedev->packet); 333 mousedev_notify_readers(&mousedev_mix, &mousedev->packet); 334 335 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0; 336 mousedev->packet.abs_event = 0; 337 } 338 break; 339 } 340 } 341 342 static int mousedev_fasync(int fd, struct file *file, int on) 343 { 344 int retval; 345 struct mousedev_list *list = file->private_data; 346 retval = fasync_helper(fd, file, on, &list->fasync); 347 return retval < 0 ? retval : 0; 348 } 349 350 static void mousedev_free(struct mousedev *mousedev) 351 { 352 mousedev_table[mousedev->minor] = NULL; 353 kfree(mousedev); 354 } 355 356 static int mixdev_release(void) 357 { 358 struct input_handle *handle; 359 360 list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { 361 struct mousedev *mousedev = handle->private; 362 363 if (!mousedev->open) { 364 if (mousedev->exist) 365 input_close_device(&mousedev->handle); 366 else 367 mousedev_free(mousedev); 368 } 369 } 370 371 return 0; 372 } 373 374 static int mousedev_release(struct inode * inode, struct file * file) 375 { 376 struct mousedev_list *list = file->private_data; 377 378 mousedev_fasync(-1, file, 0); 379 380 list_del(&list->node); 381 382 if (!--list->mousedev->open) { 383 if (list->mousedev->minor == MOUSEDEV_MIX) 384 return mixdev_release(); 385 386 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 = kmalloc(sizeof(struct mousedev_list), GFP_KERNEL))) 416 return -ENOMEM; 417 memset(list, 0, sizeof(struct mousedev_list)); 418 419 spin_lock_init(&list->packet_lock); 420 list->pos_x = xres / 2; 421 list->pos_y = yres / 2; 422 list->mousedev = mousedev_table[i]; 423 list_add_tail(&list->node, &mousedev_table[i]->list); 424 file->private_data = list; 425 426 if (!list->mousedev->open++) { 427 if (list->mousedev->minor == MOUSEDEV_MIX) { 428 list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { 429 mousedev = handle->private; 430 if (!mousedev->open && mousedev->exist) 431 input_open_device(handle); 432 } 433 } else 434 if (!mousedev_mix.open && list->mousedev->exist) 435 input_open_device(&list->mousedev->handle); 436 } 437 438 return 0; 439 } 440 441 static inline int mousedev_limit_delta(int delta, int limit) 442 { 443 return delta > limit ? limit : (delta < -limit ? -limit : delta); 444 } 445 446 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data) 447 { 448 struct mousedev_motion *p; 449 unsigned long flags; 450 451 spin_lock_irqsave(&list->packet_lock, flags); 452 p = &list->packets[list->tail]; 453 454 ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); 455 ps2_data[1] = mousedev_limit_delta(p->dx, 127); 456 ps2_data[2] = mousedev_limit_delta(p->dy, 127); 457 p->dx -= ps2_data[1]; 458 p->dy -= ps2_data[2]; 459 460 switch (list->mode) { 461 case MOUSEDEV_EMUL_EXPS: 462 ps2_data[3] = mousedev_limit_delta(p->dz, 7); 463 p->dz -= ps2_data[3]; 464 ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); 465 list->bufsiz = 4; 466 break; 467 468 case MOUSEDEV_EMUL_IMPS: 469 ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); 470 ps2_data[3] = mousedev_limit_delta(p->dz, 127); 471 p->dz -= ps2_data[3]; 472 list->bufsiz = 4; 473 break; 474 475 case MOUSEDEV_EMUL_PS2: 476 default: 477 ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); 478 p->dz = 0; 479 list->bufsiz = 3; 480 break; 481 } 482 483 if (!p->dx && !p->dy && !p->dz) { 484 if (list->tail == list->head) { 485 list->ready = 0; 486 list->last_buttons = p->buttons; 487 } else 488 list->tail = (list->tail + 1) % PACKET_QUEUE_LEN; 489 } 490 491 spin_unlock_irqrestore(&list->packet_lock, flags); 492 } 493 494 495 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos) 496 { 497 struct mousedev_list *list = file->private_data; 498 unsigned char c; 499 unsigned int i; 500 501 for (i = 0; i < count; i++) { 502 503 if (get_user(c, buffer + i)) 504 return -EFAULT; 505 506 if (c == mousedev_imex_seq[list->imexseq]) { 507 if (++list->imexseq == MOUSEDEV_SEQ_LEN) { 508 list->imexseq = 0; 509 list->mode = MOUSEDEV_EMUL_EXPS; 510 } 511 } else list->imexseq = 0; 512 513 if (c == mousedev_imps_seq[list->impsseq]) { 514 if (++list->impsseq == MOUSEDEV_SEQ_LEN) { 515 list->impsseq = 0; 516 list->mode = MOUSEDEV_EMUL_IMPS; 517 } 518 } else list->impsseq = 0; 519 520 list->ps2[0] = 0xfa; 521 522 switch (c) { 523 524 case 0xeb: /* Poll */ 525 mousedev_packet(list, &list->ps2[1]); 526 list->bufsiz++; /* account for leading ACK */ 527 break; 528 529 case 0xf2: /* Get ID */ 530 switch (list->mode) { 531 case MOUSEDEV_EMUL_PS2: list->ps2[1] = 0; break; 532 case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break; 533 case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break; 534 } 535 list->bufsiz = 2; 536 break; 537 538 case 0xe9: /* Get info */ 539 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200; 540 list->bufsiz = 4; 541 break; 542 543 case 0xff: /* Reset */ 544 list->impsseq = list->imexseq = 0; 545 list->mode = MOUSEDEV_EMUL_PS2; 546 list->ps2[1] = 0xaa; list->ps2[2] = 0x00; 547 list->bufsiz = 3; 548 break; 549 550 default: 551 list->bufsiz = 1; 552 break; 553 } 554 555 list->buffer = list->bufsiz; 556 } 557 558 kill_fasync(&list->fasync, SIGIO, POLL_IN); 559 560 wake_up_interruptible(&list->mousedev->wait); 561 562 return count; 563 } 564 565 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos) 566 { 567 struct mousedev_list *list = file->private_data; 568 int retval = 0; 569 570 if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK)) 571 return -EAGAIN; 572 573 retval = wait_event_interruptible(list->mousedev->wait, 574 !list->mousedev->exist || list->ready || list->buffer); 575 576 if (retval) 577 return retval; 578 579 if (!list->mousedev->exist) 580 return -ENODEV; 581 582 if (!list->buffer && list->ready) { 583 mousedev_packet(list, list->ps2); 584 list->buffer = list->bufsiz; 585 } 586 587 if (count > list->buffer) 588 count = list->buffer; 589 590 list->buffer -= count; 591 592 if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count)) 593 return -EFAULT; 594 595 return count; 596 } 597 598 /* No kernel lock - fine */ 599 static unsigned int mousedev_poll(struct file *file, poll_table *wait) 600 { 601 struct mousedev_list *list = file->private_data; 602 poll_wait(file, &list->mousedev->wait, wait); 603 return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) | 604 (list->mousedev->exist ? 0 : (POLLHUP | POLLERR)); 605 } 606 607 static struct file_operations mousedev_fops = { 608 .owner = THIS_MODULE, 609 .read = mousedev_read, 610 .write = mousedev_write, 611 .poll = mousedev_poll, 612 .open = mousedev_open, 613 .release = mousedev_release, 614 .fasync = mousedev_fasync, 615 }; 616 617 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id) 618 { 619 struct mousedev *mousedev; 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 = kmalloc(sizeof(struct mousedev), GFP_KERNEL))) 629 return NULL; 630 memset(mousedev, 0, sizeof(struct mousedev)); 631 632 INIT_LIST_HEAD(&mousedev->list); 633 init_waitqueue_head(&mousedev->wait); 634 635 mousedev->minor = minor; 636 mousedev->exist = 1; 637 mousedev->handle.dev = dev; 638 mousedev->handle.name = mousedev->name; 639 mousedev->handle.handler = handler; 640 mousedev->handle.private = mousedev; 641 sprintf(mousedev->name, "mouse%d", minor); 642 643 if (mousedev_mix.open) 644 input_open_device(&mousedev->handle); 645 646 mousedev_table[minor] = mousedev; 647 648 devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor), 649 S_IFCHR|S_IRUGO|S_IWUSR, "input/mouse%d", minor); 650 class_simple_device_add(input_class, 651 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor), 652 dev->dev, "mouse%d", minor); 653 654 return &mousedev->handle; 655 } 656 657 static void mousedev_disconnect(struct input_handle *handle) 658 { 659 struct mousedev *mousedev = handle->private; 660 struct mousedev_list *list; 661 662 class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor)); 663 devfs_remove("input/mouse%d", mousedev->minor); 664 mousedev->exist = 0; 665 666 if (mousedev->open) { 667 input_close_device(handle); 668 wake_up_interruptible(&mousedev->wait); 669 list_for_each_entry(list, &mousedev->list, node) 670 kill_fasync(&list->fasync, SIGIO, POLL_HUP); 671 } else { 672 if (mousedev_mix.open) 673 input_close_device(handle); 674 mousedev_free(mousedev); 675 } 676 } 677 678 static struct input_device_id mousedev_ids[] = { 679 { 680 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT, 681 .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, 682 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) }, 683 .relbit = { BIT(REL_X) | BIT(REL_Y) }, 684 }, /* A mouse like device, at least one button, two relative axes */ 685 { 686 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT, 687 .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, 688 .relbit = { BIT(REL_WHEEL) }, 689 }, /* A separate scrollwheel */ 690 { 691 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, 692 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, 693 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, 694 .absbit = { BIT(ABS_X) | BIT(ABS_Y) }, 695 }, /* A tablet like device, at least touch detection, two absolute axes */ 696 { 697 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, 698 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, 699 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) }, 700 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) }, 701 }, /* A touchpad */ 702 703 { }, /* Terminating entry */ 704 }; 705 706 MODULE_DEVICE_TABLE(input, mousedev_ids); 707 708 static struct input_handler mousedev_handler = { 709 .event = mousedev_event, 710 .connect = mousedev_connect, 711 .disconnect = mousedev_disconnect, 712 .fops = &mousedev_fops, 713 .minor = MOUSEDEV_MINOR_BASE, 714 .name = "mousedev", 715 .id_table = mousedev_ids, 716 }; 717 718 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 719 static struct miscdevice psaux_mouse = { 720 PSMOUSE_MINOR, "psaux", &mousedev_fops 721 }; 722 static int psaux_registered; 723 #endif 724 725 static int __init mousedev_init(void) 726 { 727 input_register_handler(&mousedev_handler); 728 729 memset(&mousedev_mix, 0, sizeof(struct mousedev)); 730 INIT_LIST_HEAD(&mousedev_mix.list); 731 init_waitqueue_head(&mousedev_mix.wait); 732 mousedev_table[MOUSEDEV_MIX] = &mousedev_mix; 733 mousedev_mix.exist = 1; 734 mousedev_mix.minor = MOUSEDEV_MIX; 735 736 devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), 737 S_IFCHR|S_IRUGO|S_IWUSR, "input/mice"); 738 class_simple_device_add(input_class, MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), 739 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 devfs_remove("input/mice"); 758 class_simple_device_remove(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