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 }; 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; 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; 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; 222 223 list_for_each_entry(list, &mousedev->list, node) { 224 spin_lock_irqsave(&list->packet_lock, flags); 225 226 p = &list->packets[list->head]; 227 if (list->ready && p->buttons != packet->buttons) { 228 unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN; 229 if (new_head != list->tail) { 230 p = &list->packets[list->head = new_head]; 231 memset(p, 0, sizeof(struct mousedev_motion)); 232 } 233 } 234 235 if (packet->abs_event) { 236 p->dx += packet->x - list->pos_x; 237 p->dy += packet->y - list->pos_y; 238 list->pos_x = packet->x; 239 list->pos_y = packet->y; 240 } 241 242 list->pos_x += packet->dx; 243 list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x); 244 list->pos_y += packet->dy; 245 list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y); 246 247 p->dx += packet->dx; 248 p->dy += packet->dy; 249 p->dz += packet->dz; 250 p->buttons = mousedev->packet.buttons; 251 252 list->ready = 1; 253 254 spin_unlock_irqrestore(&list->packet_lock, flags); 255 kill_fasync(&list->fasync, SIGIO, POLL_IN); 256 } 257 258 wake_up_interruptible(&mousedev->wait); 259 } 260 261 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) 262 { 263 if (!value) { 264 if (mousedev->touch && 265 time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) { 266 /* 267 * Toggle left button to emulate tap. 268 * We rely on the fact that mousedev_mix always has 0 269 * motion packet so we won't mess current position. 270 */ 271 set_bit(0, &mousedev->packet.buttons); 272 set_bit(0, &mousedev_mix.packet.buttons); 273 mousedev_notify_readers(mousedev, &mousedev_mix.packet); 274 mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet); 275 clear_bit(0, &mousedev->packet.buttons); 276 clear_bit(0, &mousedev_mix.packet.buttons); 277 } 278 mousedev->touch = mousedev->pkt_count = 0; 279 mousedev->frac_dx = 0; 280 mousedev->frac_dy = 0; 281 } 282 else 283 if (!mousedev->touch) 284 mousedev->touch = jiffies; 285 } 286 287 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) 288 { 289 struct mousedev *mousedev = handle->private; 290 291 switch (type) { 292 case EV_ABS: 293 /* Ignore joysticks */ 294 if (test_bit(BTN_TRIGGER, handle->dev->keybit)) 295 return; 296 297 if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) 298 mousedev_touchpad_event(handle->dev, mousedev, code, value); 299 else 300 mousedev_abs_event(handle->dev, mousedev, code, value); 301 302 break; 303 304 case EV_REL: 305 mousedev_rel_event(mousedev, code, value); 306 break; 307 308 case EV_KEY: 309 if (value != 2) { 310 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) 311 mousedev_touchpad_touch(mousedev, value); 312 else 313 mousedev_key_event(mousedev, code, value); 314 } 315 break; 316 317 case EV_SYN: 318 if (code == SYN_REPORT) { 319 if (mousedev->touch) { 320 mousedev->pkt_count++; 321 /* Input system eats duplicate events, but we need all of them 322 * to do correct averaging so apply present one forward 323 */ 324 fx(0) = fx(1); 325 fy(0) = fy(1); 326 } 327 328 mousedev_notify_readers(mousedev, &mousedev->packet); 329 mousedev_notify_readers(&mousedev_mix, &mousedev->packet); 330 331 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0; 332 mousedev->packet.abs_event = 0; 333 } 334 break; 335 } 336 } 337 338 static int mousedev_fasync(int fd, struct file *file, int on) 339 { 340 int retval; 341 struct mousedev_list *list = file->private_data; 342 retval = fasync_helper(fd, file, on, &list->fasync); 343 return retval < 0 ? retval : 0; 344 } 345 346 static void mousedev_free(struct mousedev *mousedev) 347 { 348 mousedev_table[mousedev->minor] = NULL; 349 kfree(mousedev); 350 } 351 352 static int mixdev_release(void) 353 { 354 struct input_handle *handle; 355 356 list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { 357 struct mousedev *mousedev = handle->private; 358 359 if (!mousedev->open) { 360 if (mousedev->exist) 361 input_close_device(&mousedev->handle); 362 else 363 mousedev_free(mousedev); 364 } 365 } 366 367 return 0; 368 } 369 370 static int mousedev_release(struct inode * inode, struct file * file) 371 { 372 struct mousedev_list *list = file->private_data; 373 374 mousedev_fasync(-1, file, 0); 375 376 list_del(&list->node); 377 378 if (!--list->mousedev->open) { 379 if (list->mousedev->minor == MOUSEDEV_MIX) 380 return mixdev_release(); 381 382 if (!mousedev_mix.open) { 383 if (list->mousedev->exist) 384 input_close_device(&list->mousedev->handle); 385 else 386 mousedev_free(list->mousedev); 387 } 388 } 389 390 kfree(list); 391 return 0; 392 } 393 394 static int mousedev_open(struct inode * inode, struct file * file) 395 { 396 struct mousedev_list *list; 397 struct input_handle *handle; 398 struct mousedev *mousedev; 399 int i; 400 401 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 402 if (imajor(inode) == MISC_MAJOR) 403 i = MOUSEDEV_MIX; 404 else 405 #endif 406 i = iminor(inode) - MOUSEDEV_MINOR_BASE; 407 408 if (i >= MOUSEDEV_MINORS || !mousedev_table[i]) 409 return -ENODEV; 410 411 if (!(list = kmalloc(sizeof(struct mousedev_list), GFP_KERNEL))) 412 return -ENOMEM; 413 memset(list, 0, sizeof(struct mousedev_list)); 414 415 spin_lock_init(&list->packet_lock); 416 list->pos_x = xres / 2; 417 list->pos_y = yres / 2; 418 list->mousedev = mousedev_table[i]; 419 list_add_tail(&list->node, &mousedev_table[i]->list); 420 file->private_data = list; 421 422 if (!list->mousedev->open++) { 423 if (list->mousedev->minor == MOUSEDEV_MIX) { 424 list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { 425 mousedev = handle->private; 426 if (!mousedev->open && mousedev->exist) 427 input_open_device(handle); 428 } 429 } else 430 if (!mousedev_mix.open && list->mousedev->exist) 431 input_open_device(&list->mousedev->handle); 432 } 433 434 return 0; 435 } 436 437 static inline int mousedev_limit_delta(int delta, int limit) 438 { 439 return delta > limit ? limit : (delta < -limit ? -limit : delta); 440 } 441 442 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data) 443 { 444 struct mousedev_motion *p; 445 unsigned long flags; 446 447 spin_lock_irqsave(&list->packet_lock, flags); 448 p = &list->packets[list->tail]; 449 450 ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); 451 ps2_data[1] = mousedev_limit_delta(p->dx, 127); 452 ps2_data[2] = mousedev_limit_delta(p->dy, 127); 453 p->dx -= ps2_data[1]; 454 p->dy -= ps2_data[2]; 455 456 switch (list->mode) { 457 case MOUSEDEV_EMUL_EXPS: 458 ps2_data[3] = mousedev_limit_delta(p->dz, 7); 459 p->dz -= ps2_data[3]; 460 ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); 461 list->bufsiz = 4; 462 break; 463 464 case MOUSEDEV_EMUL_IMPS: 465 ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); 466 ps2_data[3] = mousedev_limit_delta(p->dz, 127); 467 p->dz -= ps2_data[3]; 468 list->bufsiz = 4; 469 break; 470 471 case MOUSEDEV_EMUL_PS2: 472 default: 473 ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); 474 p->dz = 0; 475 list->bufsiz = 3; 476 break; 477 } 478 479 if (!p->dx && !p->dy && !p->dz) { 480 if (list->tail == list->head) 481 list->ready = 0; 482 else 483 list->tail = (list->tail + 1) % PACKET_QUEUE_LEN; 484 } 485 486 spin_unlock_irqrestore(&list->packet_lock, flags); 487 } 488 489 490 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos) 491 { 492 struct mousedev_list *list = file->private_data; 493 unsigned char c; 494 unsigned int i; 495 496 for (i = 0; i < count; i++) { 497 498 if (get_user(c, buffer + i)) 499 return -EFAULT; 500 501 if (c == mousedev_imex_seq[list->imexseq]) { 502 if (++list->imexseq == MOUSEDEV_SEQ_LEN) { 503 list->imexseq = 0; 504 list->mode = MOUSEDEV_EMUL_EXPS; 505 } 506 } else list->imexseq = 0; 507 508 if (c == mousedev_imps_seq[list->impsseq]) { 509 if (++list->impsseq == MOUSEDEV_SEQ_LEN) { 510 list->impsseq = 0; 511 list->mode = MOUSEDEV_EMUL_IMPS; 512 } 513 } else list->impsseq = 0; 514 515 list->ps2[0] = 0xfa; 516 517 switch (c) { 518 519 case 0xeb: /* Poll */ 520 mousedev_packet(list, &list->ps2[1]); 521 list->bufsiz++; /* account for leading ACK */ 522 break; 523 524 case 0xf2: /* Get ID */ 525 switch (list->mode) { 526 case MOUSEDEV_EMUL_PS2: list->ps2[1] = 0; break; 527 case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break; 528 case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break; 529 } 530 list->bufsiz = 2; 531 break; 532 533 case 0xe9: /* Get info */ 534 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200; 535 list->bufsiz = 4; 536 break; 537 538 case 0xff: /* Reset */ 539 list->impsseq = list->imexseq = 0; 540 list->mode = MOUSEDEV_EMUL_PS2; 541 list->ps2[1] = 0xaa; list->ps2[2] = 0x00; 542 list->bufsiz = 3; 543 break; 544 545 default: 546 list->bufsiz = 1; 547 break; 548 } 549 550 list->buffer = list->bufsiz; 551 } 552 553 kill_fasync(&list->fasync, SIGIO, POLL_IN); 554 555 wake_up_interruptible(&list->mousedev->wait); 556 557 return count; 558 } 559 560 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos) 561 { 562 struct mousedev_list *list = file->private_data; 563 int retval = 0; 564 565 if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK)) 566 return -EAGAIN; 567 568 retval = wait_event_interruptible(list->mousedev->wait, 569 !list->mousedev->exist || list->ready || list->buffer); 570 571 if (retval) 572 return retval; 573 574 if (!list->mousedev->exist) 575 return -ENODEV; 576 577 if (!list->buffer && list->ready) { 578 mousedev_packet(list, list->ps2); 579 list->buffer = list->bufsiz; 580 } 581 582 if (count > list->buffer) 583 count = list->buffer; 584 585 list->buffer -= count; 586 587 if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count)) 588 return -EFAULT; 589 590 return count; 591 } 592 593 /* No kernel lock - fine */ 594 static unsigned int mousedev_poll(struct file *file, poll_table *wait) 595 { 596 struct mousedev_list *list = file->private_data; 597 poll_wait(file, &list->mousedev->wait, wait); 598 return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) | 599 (list->mousedev->exist ? 0 : (POLLHUP | POLLERR)); 600 } 601 602 static struct file_operations mousedev_fops = { 603 .owner = THIS_MODULE, 604 .read = mousedev_read, 605 .write = mousedev_write, 606 .poll = mousedev_poll, 607 .open = mousedev_open, 608 .release = mousedev_release, 609 .fasync = mousedev_fasync, 610 }; 611 612 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id) 613 { 614 struct mousedev *mousedev; 615 int minor = 0; 616 617 for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++); 618 if (minor == MOUSEDEV_MINORS) { 619 printk(KERN_ERR "mousedev: no more free mousedev devices\n"); 620 return NULL; 621 } 622 623 if (!(mousedev = kmalloc(sizeof(struct mousedev), GFP_KERNEL))) 624 return NULL; 625 memset(mousedev, 0, sizeof(struct mousedev)); 626 627 INIT_LIST_HEAD(&mousedev->list); 628 init_waitqueue_head(&mousedev->wait); 629 630 mousedev->minor = minor; 631 mousedev->exist = 1; 632 mousedev->handle.dev = dev; 633 mousedev->handle.name = mousedev->name; 634 mousedev->handle.handler = handler; 635 mousedev->handle.private = mousedev; 636 sprintf(mousedev->name, "mouse%d", minor); 637 638 if (mousedev_mix.open) 639 input_open_device(&mousedev->handle); 640 641 mousedev_table[minor] = mousedev; 642 643 devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor), 644 S_IFCHR|S_IRUGO|S_IWUSR, "input/mouse%d", minor); 645 class_simple_device_add(input_class, 646 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor), 647 dev->dev, "mouse%d", minor); 648 649 return &mousedev->handle; 650 } 651 652 static void mousedev_disconnect(struct input_handle *handle) 653 { 654 struct mousedev *mousedev = handle->private; 655 struct mousedev_list *list; 656 657 class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor)); 658 devfs_remove("input/mouse%d", mousedev->minor); 659 mousedev->exist = 0; 660 661 if (mousedev->open) { 662 input_close_device(handle); 663 wake_up_interruptible(&mousedev->wait); 664 list_for_each_entry(list, &mousedev->list, node) 665 kill_fasync(&list->fasync, SIGIO, POLL_HUP); 666 } else { 667 if (mousedev_mix.open) 668 input_close_device(handle); 669 mousedev_free(mousedev); 670 } 671 } 672 673 static struct input_device_id mousedev_ids[] = { 674 { 675 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT, 676 .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, 677 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) }, 678 .relbit = { BIT(REL_X) | BIT(REL_Y) }, 679 }, /* A mouse like device, at least one button, two relative axes */ 680 { 681 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT, 682 .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, 683 .relbit = { BIT(REL_WHEEL) }, 684 }, /* A separate scrollwheel */ 685 { 686 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, 687 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, 688 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, 689 .absbit = { BIT(ABS_X) | BIT(ABS_Y) }, 690 }, /* A tablet like device, at least touch detection, two absolute axes */ 691 { 692 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, 693 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, 694 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) }, 695 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) }, 696 }, /* A touchpad */ 697 698 { }, /* Terminating entry */ 699 }; 700 701 MODULE_DEVICE_TABLE(input, mousedev_ids); 702 703 static struct input_handler mousedev_handler = { 704 .event = mousedev_event, 705 .connect = mousedev_connect, 706 .disconnect = mousedev_disconnect, 707 .fops = &mousedev_fops, 708 .minor = MOUSEDEV_MINOR_BASE, 709 .name = "mousedev", 710 .id_table = mousedev_ids, 711 }; 712 713 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 714 static struct miscdevice psaux_mouse = { 715 PSMOUSE_MINOR, "psaux", &mousedev_fops 716 }; 717 static int psaux_registered; 718 #endif 719 720 static int __init mousedev_init(void) 721 { 722 input_register_handler(&mousedev_handler); 723 724 memset(&mousedev_mix, 0, sizeof(struct mousedev)); 725 INIT_LIST_HEAD(&mousedev_mix.list); 726 init_waitqueue_head(&mousedev_mix.wait); 727 mousedev_table[MOUSEDEV_MIX] = &mousedev_mix; 728 mousedev_mix.exist = 1; 729 mousedev_mix.minor = MOUSEDEV_MIX; 730 731 devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), 732 S_IFCHR|S_IRUGO|S_IWUSR, "input/mice"); 733 class_simple_device_add(input_class, MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), 734 NULL, "mice"); 735 736 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 737 if (!(psaux_registered = !misc_register(&psaux_mouse))) 738 printk(KERN_WARNING "mice: could not misc_register the device\n"); 739 #endif 740 741 printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n"); 742 743 return 0; 744 } 745 746 static void __exit mousedev_exit(void) 747 { 748 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX 749 if (psaux_registered) 750 misc_deregister(&psaux_mouse); 751 #endif 752 devfs_remove("input/mice"); 753 class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX)); 754 input_unregister_handler(&mousedev_handler); 755 } 756 757 module_init(mousedev_init); 758 module_exit(mousedev_exit); 759