drivers/input/mousedev.c

   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 struct mousedev_motion {
  52         int dx, dy, dz;
  53 };
  54
  55 struct mousedev {
  56         int exist;
  57         int open;
  58         int minor;
  59         char name[16];
  60         wait_queue_head_t wait;
  61         struct list_head list;
  62         struct input_handle handle;
  63
  64         struct mousedev_motion packet;
  65         unsigned long buttons;
  66         unsigned int pkt_count;
  67         int old_x[4], old_y[4];
  68         unsigned int touch;
  69 };
  70
  71 struct mousedev_list {
  72         struct fasync_struct *fasync;
  73         struct mousedev *mousedev;
  74         struct list_head node;
  75         int dx, dy, dz;
  76         unsigned long buttons;
  77         signed char ps2[6];
  78         unsigned char ready, buffer, bufsiz;
  79         unsigned char mode, imexseq, impsseq;
  80 };
  81
  82 #define MOUSEDEV_SEQ_LEN        6
  83
  84 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };
  85 static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 };
  86
  87 static struct input_handler mousedev_handler;
  88
  89 static struct mousedev *mousedev_table[MOUSEDEV_MINORS];
  90 static struct mousedev mousedev_mix;
  91
  92 #define fx(i)  (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
  93 #define fy(i)  (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
  94
  95 static void mousedev_touchpad_event(struct mousedev *mousedev, unsigned int code, int value)
  96 {
  97         if (mousedev->touch) {
  98                 switch (code) {
  99                         case ABS_X:
 100                                 fx(0) = value;
 101                                 if (mousedev->pkt_count >= 2)
 102                                         mousedev->packet.dx = ((fx(0) - fx(1)) / 2 + (fx(1) - fx(2)) / 2) / 8;
 103                                 break;
 104
 105                         case ABS_Y:
 106                                 fy(0) = value;
 107                                 if (mousedev->pkt_count >= 2)
 108                                         mousedev->packet.dy = -((fy(0) - fy(1)) / 2 + (fy(1) - fy(2)) / 2) / 8;
 109                                 break;
 110                 }
 111         }
 112 }
 113
 114 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
 115 {
 116         int size;
 117
 118         switch (code) {
 119                 case ABS_X:
 120                         size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
 121                         if (size == 0) size = xres;
 122                         mousedev->packet.dx = (value * xres - mousedev->old_x[0]) / size;
 123                         mousedev->old_x[0] = mousedev->packet.dx * size;
 124                         break;
 125
 126                 case ABS_Y:
 127                         size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
 128                         if (size == 0) size = yres;
 129                         mousedev->packet.dy = (value * yres - mousedev->old_y[0]) / size;
 130                         mousedev->old_y[0] = mousedev->packet.dy * size;
 131                         break;
 132         }
 133 }
 134
 135 static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value)
 136 {
 137         switch (code) {
 138                 case REL_X:     mousedev->packet.dx += value; break;
 139                 case REL_Y:     mousedev->packet.dy -= value; break;
 140                 case REL_WHEEL: mousedev->packet.dz -= value; break;
 141         }
 142 }
 143
 144 static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value)
 145 {
 146         int index;
 147
 148         switch (code) {
 149                 case BTN_TOUCH:
 150                 case BTN_0:
 151                 case BTN_FORWARD:
 152                 case BTN_LEFT:          index = 0; break;
 153                 case BTN_STYLUS:
 154                 case BTN_1:
 155                 case BTN_RIGHT:         index = 1; break;
 156                 case BTN_2:
 157                 case BTN_STYLUS2:
 158                 case BTN_MIDDLE:        index = 2; break;
 159                 case BTN_3:
 160                 case BTN_BACK:
 161                 case BTN_SIDE:          index = 3; break;
 162                 case BTN_4:
 163                 case BTN_EXTRA:         index = 4; break;
 164                 default:                return;
 165         }
 166
 167         if (value) {
 168                 set_bit(index, &mousedev->buttons);
 169                 set_bit(index, &mousedev_mix.buttons);
 170         } else {
 171                 clear_bit(index, &mousedev->buttons);
 172                 clear_bit(index, &mousedev_mix.buttons);
 173         }
 174 }
 175
 176 static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_motion *packet)
 177 {
 178         struct mousedev_list *list;
 179
 180         list_for_each_entry(list, &mousedev->list, node) {
 181                 list->dx += packet->dx;
 182                 list->dy += packet->dy;
 183                 list->dz += packet->dz;
 184                 list->buttons = mousedev->buttons;
 185                 list->ready = 1;
 186                 kill_fasync(&list->fasync, SIGIO, POLL_IN);
 187         }
 188
 189         wake_up_interruptible(&mousedev->wait);
 190 }
 191
 192 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
 193 {
 194         struct mousedev *mousedev = handle->private;
 195
 196         switch (type) {
 197                 case EV_ABS:
 198                         /* Ignore joysticks */
 199                         if (test_bit(BTN_TRIGGER, handle->dev->keybit))
 200                                 return;
 201
 202                         if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
 203                                 mousedev_touchpad_event(mousedev, code, value);
 204                         else
 205                                 mousedev_abs_event(handle->dev, mousedev, code, value);
 206
 207                         break;
 208
 209                 case EV_REL:
 210                         mousedev_rel_event(mousedev, code, value);
 211                         break;
 212
 213                 case EV_KEY:
 214                         if (value != 2) {
 215                                 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) {
 216                                         /* Handle touchpad data */
 217                                         mousedev->touch = value;
 218                                         if (!mousedev->touch)
 219                                                 mousedev->pkt_count = 0;
 220                                 }
 221                                 else
 222                                         mousedev_key_event(mousedev, code, value);
 223                         }
 224                         break;
 225
 226                 case EV_SYN:
 227                         if (code == SYN_REPORT) {
 228                                 if (mousedev->touch) {
 229                                         mousedev->pkt_count++;
 230                                         /* Input system eats duplicate events, but we need all of them
 231                                          * to do correct averaging so apply present one forward
 232                                          */
 233                                         fx(0) = fx(1);
 234                                         fy(0) = fy(1);
 235                                 }
 236
 237                                 mousedev_notify_readers(mousedev, &mousedev->packet);
 238                                 mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
 239
 240                                 memset(&mousedev->packet, 0, sizeof(struct mousedev_motion));
 241                         }
 242                         break;
 243         }
 244 }
 245
 246 static int mousedev_fasync(int fd, struct file *file, int on)
 247 {
 248         int retval;
 249         struct mousedev_list *list = file->private_data;
 250         retval = fasync_helper(fd, file, on, &list->fasync);
 251         return retval < 0 ? retval : 0;
 252 }
 253
 254 static void mousedev_free(struct mousedev *mousedev)
 255 {
 256         devfs_remove("input/mouse%d", mousedev->minor);
 257         class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor));
 258         mousedev_table[mousedev->minor] = NULL;
 259         kfree(mousedev);
 260 }
 261
 262 static int mixdev_release(void)
 263 {
 264         struct input_handle *handle;
 265
 266         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
 267                 struct mousedev *mousedev = handle->private;
 268
 269                 if (!mousedev->open) {
 270                         if (mousedev->exist)
 271                                 input_close_device(&mousedev->handle);
 272                         else
 273                                 mousedev_free(mousedev);
 274                 }
 275         }
 276
 277         return 0;
 278 }
 279
 280 static int mousedev_release(struct inode * inode, struct file * file)
 281 {
 282         struct mousedev_list *list = file->private_data;
 283
 284         mousedev_fasync(-1, file, 0);
 285
 286         list_del(&list->node);
 287
 288         if (!--list->mousedev->open) {
 289                 if (list->mousedev->minor == MOUSEDEV_MIX)
 290                         return mixdev_release();
 291
 292                 if (!mousedev_mix.open) {
 293                         if (list->mousedev->exist)
 294                                 input_close_device(&list->mousedev->handle);
 295                         else
 296                                 mousedev_free(list->mousedev);
 297                 }
 298         }
 299
 300         kfree(list);
 301         return 0;
 302 }
 303
 304 static int mousedev_open(struct inode * inode, struct file * file)
 305 {
 306         struct mousedev_list *list;
 307         struct input_handle *handle;
 308         struct mousedev *mousedev;
 309         int i;
 310
 311 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 312         if (imajor(inode) == MISC_MAJOR)
 313                 i = MOUSEDEV_MIX;
 314         else
 315 #endif
 316                 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
 317
 318         if (i >= MOUSEDEV_MINORS || !mousedev_table[i])
 319                 return -ENODEV;
 320
 321         if (!(list = kmalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
 322                 return -ENOMEM;
 323         memset(list, 0, sizeof(struct mousedev_list));
 324
 325         list->mousedev = mousedev_table[i];
 326         list_add_tail(&list->node, &mousedev_table[i]->list);
 327         file->private_data = list;
 328
 329         if (!list->mousedev->open++) {
 330                 if (list->mousedev->minor == MOUSEDEV_MIX) {
 331                         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
 332                                 mousedev = handle->private;
 333                                 if (!mousedev->open && mousedev->exist)
 334                                         input_open_device(handle);
 335                         }
 336                 } else
 337                         if (!mousedev_mix.open && list->mousedev->exist)
 338                                 input_open_device(&list->mousedev->handle);
 339         }
 340
 341         return 0;
 342 }
 343
 344 static void mousedev_packet(struct mousedev_list *list, unsigned char off)
 345 {
 346         list->ps2[off] = 0x08 | ((list->dx < 0) << 4) | ((list->dy < 0) << 5) | (list->buttons & 0x07);
 347         list->ps2[off + 1] = (list->dx > 127 ? 127 : (list->dx < -127 ? -127 : list->dx));
 348         list->ps2[off + 2] = (list->dy > 127 ? 127 : (list->dy < -127 ? -127 : list->dy));
 349         list->dx -= list->ps2[off + 1];
 350         list->dy -= list->ps2[off + 2];
 351         list->bufsiz = off + 3;
 352
 353         if (list->mode == 2) {
 354                 list->ps2[off + 3] = (list->dz > 7 ? 7 : (list->dz < -7 ? -7 : list->dz));
 355                 list->dz -= list->ps2[off + 3];
 356                 list->ps2[off + 3] = (list->ps2[off + 3] & 0x0f) | ((list->buttons & 0x18) << 1);
 357                 list->bufsiz++;
 358         } else {
 359                 list->ps2[off] |= ((list->buttons & 0x10) >> 3) | ((list->buttons & 0x08) >> 1);
 360         }
 361
 362         if (list->mode == 1) {
 363                 list->ps2[off + 3] = (list->dz > 127 ? 127 : (list->dz < -127 ? -127 : list->dz));
 364                 list->dz -= list->ps2[off + 3];
 365                 list->bufsiz++;
 366         }
 367
 368         if (!list->dx && !list->dy && (!list->mode || !list->dz)) list->ready = 0;
 369         list->buffer = list->bufsiz;
 370 }
 371
 372
 373 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
 374 {
 375         struct mousedev_list *list = file->private_data;
 376         unsigned char c;
 377         unsigned int i;
 378
 379         for (i = 0; i < count; i++) {
 380
 381                 if (get_user(c, buffer + i))
 382                         return -EFAULT;
 383
 384                 if (c == mousedev_imex_seq[list->imexseq]) {
 385                         if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
 386                                 list->imexseq = 0;
 387                                 list->mode = 2;
 388                         }
 389                 } else list->imexseq = 0;
 390
 391                 if (c == mousedev_imps_seq[list->impsseq]) {
 392                         if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
 393                                 list->impsseq = 0;
 394                                 list->mode = 1;
 395                         }
 396                 } else list->impsseq = 0;
 397
 398                 list->ps2[0] = 0xfa;
 399                 list->bufsiz = 1;
 400
 401                 switch (c) {
 402
 403                         case 0xeb: /* Poll */
 404                                 mousedev_packet(list, 1);
 405                                 break;
 406
 407                         case 0xf2: /* Get ID */
 408                                 switch (list->mode) {
 409                                         case 0: list->ps2[1] = 0; break;
 410                                         case 1: list->ps2[1] = 3; break;
 411                                         case 2: list->ps2[1] = 4; break;
 412                                 }
 413                                 list->bufsiz = 2;
 414                                 break;
 415
 416                         case 0xe9: /* Get info */
 417                                 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
 418                                 list->bufsiz = 4;
 419                                 break;
 420
 421                         case 0xff: /* Reset */
 422                                 list->impsseq = 0;
 423                                 list->imexseq = 0;
 424                                 list->mode = 0;
 425                                 list->ps2[1] = 0xaa;
 426                                 list->ps2[2] = 0x00;
 427                                 list->bufsiz = 3;
 428                                 break;
 429                 }
 430
 431                 list->buffer = list->bufsiz;
 432         }
 433
 434         kill_fasync(&list->fasync, SIGIO, POLL_IN);
 435
 436         wake_up_interruptible(&list->mousedev->wait);
 437
 438         return count;
 439 }
 440
 441 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
 442 {
 443         struct mousedev_list *list = file->private_data;
 444         int retval = 0;
 445
 446         if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
 447                 return -EAGAIN;
 448
 449         retval = wait_event_interruptible(list->mousedev->wait, list->ready || list->buffer);
 450
 451         if (retval)
 452                 return retval;
 453
 454         if (!list->buffer && list->ready)
 455                 mousedev_packet(list, 0);
 456
 457         if (count > list->buffer)
 458                 count = list->buffer;
 459
 460         list->buffer -= count;
 461
 462         if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
 463                 return -EFAULT;
 464
 465         return count;
 466 }
 467
 468 /* No kernel lock - fine */
 469 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
 470 {
 471         struct mousedev_list *list = file->private_data;
 472         poll_wait(file, &list->mousedev->wait, wait);
 473         if (list->ready || list->buffer)
 474                 return POLLIN | POLLRDNORM;
 475         return 0;
 476 }
 477
 478 struct file_operations mousedev_fops = {
 479         .owner =        THIS_MODULE,
 480         .read =         mousedev_read,
 481         .write =        mousedev_write,
 482         .poll =         mousedev_poll,
 483         .open =         mousedev_open,
 484         .release =      mousedev_release,
 485         .fasync =       mousedev_fasync,
 486 };
 487
 488 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 489 {
 490         struct mousedev *mousedev;
 491         int minor = 0;
 492
 493         for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
 494         if (minor == MOUSEDEV_MINORS) {
 495                 printk(KERN_ERR "mousedev: no more free mousedev devices\n");
 496                 return NULL;
 497         }
 498
 499         if (!(mousedev = kmalloc(sizeof(struct mousedev), GFP_KERNEL)))
 500                 return NULL;
 501         memset(mousedev, 0, sizeof(struct mousedev));
 502
 503         INIT_LIST_HEAD(&mousedev->list);
 504         init_waitqueue_head(&mousedev->wait);
 505
 506         mousedev->minor = minor;
 507         mousedev->exist = 1;
 508         mousedev->handle.dev = dev;
 509         mousedev->handle.name = mousedev->name;
 510         mousedev->handle.handler = handler;
 511         mousedev->handle.private = mousedev;
 512         sprintf(mousedev->name, "mouse%d", minor);
 513
 514         if (mousedev_mix.open)
 515                 input_open_device(&mousedev->handle);
 516
 517         mousedev_table[minor] = mousedev;
 518
 519         devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
 520                         S_IFCHR|S_IRUGO|S_IWUSR, "input/mouse%d", minor);
 521         class_simple_device_add(input_class,
 522                                 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
 523                                 dev->dev, "mouse%d", minor);
 524
 525         return &mousedev->handle;
 526 }
 527
 528 static void mousedev_disconnect(struct input_handle *handle)
 529 {
 530         struct mousedev *mousedev = handle->private;
 531
 532         mousedev->exist = 0;
 533
 534         if (mousedev->open) {
 535                 input_close_device(handle);
 536         } else {
 537                 if (mousedev_mix.open)
 538                         input_close_device(handle);
 539                 mousedev_free(mousedev);
 540         }
 541 }
 542
 543 static struct input_device_id mousedev_ids[] = {
 544         {
 545                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
 546                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
 547                 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) },
 548                 .relbit = { BIT(REL_X) | BIT(REL_Y) },
 549         },      /* A mouse like device, at least one button, two relative axes */
 550         {
 551                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
 552                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
 553                 .relbit = { BIT(REL_WHEEL) },
 554         },      /* A separate scrollwheel */
 555         {
 556                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
 557                 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
 558                 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
 559                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) },
 560         },      /* A tablet like device, at least touch detection, two absolute axes */
 561         {
 562                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
 563                 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
 564                 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) },
 565                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) },
 566         },      /* A touchpad */
 567
 568         { },    /* Terminating entry */
 569 };
 570
 571 MODULE_DEVICE_TABLE(input, mousedev_ids);
 572
 573 static struct input_handler mousedev_handler = {
 574         .event =        mousedev_event,
 575         .connect =      mousedev_connect,
 576         .disconnect =   mousedev_disconnect,
 577         .fops =         &mousedev_fops,
 578         .minor =        MOUSEDEV_MINOR_BASE,
 579         .name =         "mousedev",
 580         .id_table =     mousedev_ids,
 581 };
 582
 583 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 584 static struct miscdevice psaux_mouse = {
 585         PSMOUSE_MINOR, "psaux", &mousedev_fops
 586 };
 587 static int psaux_registered;
 588 #endif
 589
 590 static int __init mousedev_init(void)
 591 {
 592         input_register_handler(&mousedev_handler);
 593
 594         memset(&mousedev_mix, 0, sizeof(struct mousedev));
 595         INIT_LIST_HEAD(&mousedev_mix.list);
 596         init_waitqueue_head(&mousedev_mix.wait);
 597         mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
 598         mousedev_mix.exist = 1;
 599         mousedev_mix.minor = MOUSEDEV_MIX;
 600
 601         devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
 602                         S_IFCHR|S_IRUGO|S_IWUSR, "input/mice");
 603         class_simple_device_add(input_class, MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
 604                                 NULL, "mice");
 605
 606 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 607         if (!(psaux_registered = !misc_register(&psaux_mouse)))
 608                 printk(KERN_WARNING "mice: could not misc_register the device\n");
 609 #endif
 610
 611         printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
 612
 613         return 0;
 614 }
 615
 616 static void __exit mousedev_exit(void)
 617 {
 618 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 619         if (psaux_registered)
 620                 misc_deregister(&psaux_mouse);
 621 #endif
 622         devfs_remove("input/mice");
 623         class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX));
 624         input_unregister_handler(&mousedev_handler);
 625 }
 626
 627 module_init(mousedev_init);
 628 module_exit(mousedev_exit);