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 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         unsigned long touch;
  75 };
  76
  77 enum mousedev_emul {
  78         MOUSEDEV_EMUL_PS2,
  79         MOUSEDEV_EMUL_IMPS,
  80         MOUSEDEV_EMUL_EXPS
  81 };
  82
  83 struct mousedev_motion {
  84         int dx, dy, dz;
  85         unsigned long buttons;
  86 };
  87
  88 #define PACKET_QUEUE_LEN        16
  89 struct mousedev_list {
  90         struct fasync_struct *fasync;
  91         struct mousedev *mousedev;
  92         struct list_head node;
  93
  94         struct mousedev_motion packets[PACKET_QUEUE_LEN];
  95         unsigned int head, tail;
  96         spinlock_t packet_lock;
  97         int pos_x, pos_y;
  98
  99         signed char ps2[6];
 100         unsigned char ready, buffer, bufsiz;
 101         unsigned char imexseq, impsseq;
 102         enum mousedev_emul mode;
 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 mousedev *mousedev, unsigned int code, int value)
 119 {
 120         if (mousedev->touch) {
 121                 switch (code) {
 122                         case ABS_X:
 123                                 fx(0) = value;
 124                                 if (mousedev->pkt_count >= 2)
 125                                         mousedev->packet.dx = ((fx(0) - fx(1)) / 2 + (fx(1) - fx(2)) / 2) / 8;
 126                                 break;
 127
 128                         case ABS_Y:
 129                                 fy(0) = value;
 130                                 if (mousedev->pkt_count >= 2)
 131                                         mousedev->packet.dy = -((fy(0) - fy(1)) / 2 + (fy(1) - fy(2)) / 2) / 8;
 132                                 break;
 133                 }
 134         }
 135 }
 136
 137 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
 138 {
 139         int size;
 140
 141         switch (code) {
 142                 case ABS_X:
 143                         size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
 144                         if (size == 0) size = xres;
 145                         if (value > dev->absmax[ABS_X]) value = dev->absmax[ABS_X];
 146                         if (value < dev->absmin[ABS_X]) value = dev->absmin[ABS_X];
 147                         mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size;
 148                         mousedev->packet.abs_event = 1;
 149                         break;
 150
 151                 case ABS_Y:
 152                         size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
 153                         if (size == 0) size = yres;
 154                         if (value > dev->absmax[ABS_Y]) value = dev->absmax[ABS_Y];
 155                         if (value < dev->absmin[ABS_Y]) value = dev->absmin[ABS_Y];
 156                         mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size;
 157                         mousedev->packet.abs_event = 1;
 158                         break;
 159         }
 160 }
 161
 162 static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value)
 163 {
 164         switch (code) {
 165                 case REL_X:     mousedev->packet.dx += value; break;
 166                 case REL_Y:     mousedev->packet.dy -= value; break;
 167                 case REL_WHEEL: mousedev->packet.dz -= value; break;
 168         }
 169 }
 170
 171 static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value)
 172 {
 173         int index;
 174
 175         switch (code) {
 176                 case BTN_TOUCH:
 177                 case BTN_0:
 178                 case BTN_FORWARD:
 179                 case BTN_LEFT:          index = 0; break;
 180                 case BTN_STYLUS:
 181                 case BTN_1:
 182                 case BTN_RIGHT:         index = 1; break;
 183                 case BTN_2:
 184                 case BTN_STYLUS2:
 185                 case BTN_MIDDLE:        index = 2; break;
 186                 case BTN_3:
 187                 case BTN_BACK:
 188                 case BTN_SIDE:          index = 3; break;
 189                 case BTN_4:
 190                 case BTN_EXTRA:         index = 4; break;
 191                 default:                return;
 192         }
 193
 194         if (value) {
 195                 set_bit(index, &mousedev->packet.buttons);
 196                 set_bit(index, &mousedev_mix.packet.buttons);
 197         } else {
 198                 clear_bit(index, &mousedev->packet.buttons);
 199                 clear_bit(index, &mousedev_mix.packet.buttons);
 200         }
 201 }
 202
 203 static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet)
 204 {
 205         struct mousedev_list *list;
 206         struct mousedev_motion *p;
 207         unsigned long flags;
 208
 209         list_for_each_entry(list, &mousedev->list, node) {
 210                 spin_lock_irqsave(&list->packet_lock, flags);
 211
 212                 p = &list->packets[list->head];
 213                 if (list->ready && p->buttons != packet->buttons) {
 214                         unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN;
 215                         if (new_head != list->tail) {
 216                                 p = &list->packets[list->head = new_head];
 217                                 memset(p, 0, sizeof(struct mousedev_motion));
 218                         }
 219                 }
 220
 221                 if (packet->abs_event) {
 222                         p->dx += packet->x - list->pos_x;
 223                         p->dy += packet->y - list->pos_y;
 224                         list->pos_x = packet->x;
 225                         list->pos_y = packet->y;
 226                 }
 227
 228                 list->pos_x += packet->dx;
 229                 list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x);
 230                 list->pos_y += packet->dy;
 231                 list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y);
 232
 233                 p->dx += packet->dx;
 234                 p->dy += packet->dy;
 235                 p->dz += packet->dz;
 236                 p->buttons = mousedev->packet.buttons;
 237
 238                 list->ready = 1;
 239
 240                 spin_unlock_irqrestore(&list->packet_lock, flags);
 241                 kill_fasync(&list->fasync, SIGIO, POLL_IN);
 242         }
 243
 244         wake_up_interruptible(&mousedev->wait);
 245 }
 246
 247 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
 248 {
 249         if (!value) {
 250                 if (mousedev->touch &&
 251                     time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) {
 252                         /*
 253                          * Toggle left button to emulate tap.
 254                          * We rely on the fact that mousedev_mix always has 0
 255                          * motion packet so we won't mess current position.
 256                          */
 257                         set_bit(0, &mousedev->packet.buttons);
 258                         set_bit(0, &mousedev_mix.packet.buttons);
 259                         mousedev_notify_readers(mousedev, &mousedev_mix.packet);
 260                         mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet);
 261                         clear_bit(0, &mousedev->packet.buttons);
 262                         clear_bit(0, &mousedev_mix.packet.buttons);
 263                 }
 264                 mousedev->touch = mousedev->pkt_count = 0;
 265         }
 266         else
 267                 if (!mousedev->touch)
 268                         mousedev->touch = jiffies;
 269 }
 270
 271 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
 272 {
 273         struct mousedev *mousedev = handle->private;
 274
 275         switch (type) {
 276                 case EV_ABS:
 277                         /* Ignore joysticks */
 278                         if (test_bit(BTN_TRIGGER, handle->dev->keybit))
 279                                 return;
 280
 281                         if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
 282                                 mousedev_touchpad_event(mousedev, code, value);
 283                         else
 284                                 mousedev_abs_event(handle->dev, mousedev, code, value);
 285
 286                         break;
 287
 288                 case EV_REL:
 289                         mousedev_rel_event(mousedev, code, value);
 290                         break;
 291
 292                 case EV_KEY:
 293                         if (value != 2) {
 294                                 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
 295                                         mousedev_touchpad_touch(mousedev, value);
 296                                 else
 297                                         mousedev_key_event(mousedev, code, value);
 298                         }
 299                         break;
 300
 301                 case EV_SYN:
 302                         if (code == SYN_REPORT) {
 303                                 if (mousedev->touch) {
 304                                         mousedev->pkt_count++;
 305                                         /* Input system eats duplicate events, but we need all of them
 306                                          * to do correct averaging so apply present one forward
 307                                          */
 308                                         fx(0) = fx(1);
 309                                         fy(0) = fy(1);
 310                                 }
 311
 312                                 mousedev_notify_readers(mousedev, &mousedev->packet);
 313                                 mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
 314
 315                                 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0;
 316                                 mousedev->packet.abs_event = 0;
 317                         }
 318                         break;
 319         }
 320 }
 321
 322 static int mousedev_fasync(int fd, struct file *file, int on)
 323 {
 324         int retval;
 325         struct mousedev_list *list = file->private_data;
 326         retval = fasync_helper(fd, file, on, &list->fasync);
 327         return retval < 0 ? retval : 0;
 328 }
 329
 330 static void mousedev_free(struct mousedev *mousedev)
 331 {
 332         mousedev_table[mousedev->minor] = NULL;
 333         kfree(mousedev);
 334 }
 335
 336 static int mixdev_release(void)
 337 {
 338         struct input_handle *handle;
 339
 340         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
 341                 struct mousedev *mousedev = handle->private;
 342
 343                 if (!mousedev->open) {
 344                         if (mousedev->exist)
 345                                 input_close_device(&mousedev->handle);
 346                         else
 347                                 mousedev_free(mousedev);
 348                 }
 349         }
 350
 351         return 0;
 352 }
 353
 354 static int mousedev_release(struct inode * inode, struct file * file)
 355 {
 356         struct mousedev_list *list = file->private_data;
 357
 358         mousedev_fasync(-1, file, 0);
 359
 360         list_del(&list->node);
 361
 362         if (!--list->mousedev->open) {
 363                 if (list->mousedev->minor == MOUSEDEV_MIX)
 364                         return mixdev_release();
 365
 366                 if (!mousedev_mix.open) {
 367                         if (list->mousedev->exist)
 368                                 input_close_device(&list->mousedev->handle);
 369                         else
 370                                 mousedev_free(list->mousedev);
 371                 }
 372         }
 373
 374         kfree(list);
 375         return 0;
 376 }
 377
 378 static int mousedev_open(struct inode * inode, struct file * file)
 379 {
 380         struct mousedev_list *list;
 381         struct input_handle *handle;
 382         struct mousedev *mousedev;
 383         int i;
 384
 385 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 386         if (imajor(inode) == MISC_MAJOR)
 387                 i = MOUSEDEV_MIX;
 388         else
 389 #endif
 390                 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
 391
 392         if (i >= MOUSEDEV_MINORS || !mousedev_table[i])
 393                 return -ENODEV;
 394
 395         if (!(list = kmalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
 396                 return -ENOMEM;
 397         memset(list, 0, sizeof(struct mousedev_list));
 398
 399         spin_lock_init(&list->packet_lock);
 400         list->pos_x = xres / 2;
 401         list->pos_y = yres / 2;
 402         list->mousedev = mousedev_table[i];
 403         list_add_tail(&list->node, &mousedev_table[i]->list);
 404         file->private_data = list;
 405
 406         if (!list->mousedev->open++) {
 407                 if (list->mousedev->minor == MOUSEDEV_MIX) {
 408                         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
 409                                 mousedev = handle->private;
 410                                 if (!mousedev->open && mousedev->exist)
 411                                         input_open_device(handle);
 412                         }
 413                 } else
 414                         if (!mousedev_mix.open && list->mousedev->exist)
 415                                 input_open_device(&list->mousedev->handle);
 416         }
 417
 418         return 0;
 419 }
 420
 421 static inline int mousedev_limit_delta(int delta, int limit)
 422 {
 423         return delta > limit ? limit : (delta < -limit ? -limit : delta);
 424 }
 425
 426 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
 427 {
 428         struct mousedev_motion *p;
 429         unsigned long flags;
 430
 431         spin_lock_irqsave(&list->packet_lock, flags);
 432         p = &list->packets[list->tail];
 433
 434         ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
 435         ps2_data[1] = mousedev_limit_delta(p->dx, 127);
 436         ps2_data[2] = mousedev_limit_delta(p->dy, 127);
 437         p->dx -= ps2_data[1];
 438         p->dy -= ps2_data[2];
 439
 440         switch (list->mode) {
 441                 case MOUSEDEV_EMUL_EXPS:
 442                         ps2_data[3] = mousedev_limit_delta(p->dz, 127);
 443                         p->dz -= ps2_data[3];
 444                         ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
 445                         list->bufsiz = 4;
 446                         break;
 447
 448                 case MOUSEDEV_EMUL_IMPS:
 449                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
 450                         ps2_data[3] = mousedev_limit_delta(p->dz, 127);
 451                         p->dz -= ps2_data[3];
 452                         list->bufsiz = 4;
 453                         break;
 454
 455                 case MOUSEDEV_EMUL_PS2:
 456                 default:
 457                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
 458                         p->dz = 0;
 459                         list->bufsiz = 3;
 460                         break;
 461         }
 462
 463         if (!p->dx && !p->dy && !p->dz) {
 464                 if (list->tail != list->head)
 465                         list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
 466                 if (list->tail == list->head)
 467                         list->ready = 0;
 468         }
 469
 470         spin_unlock_irqrestore(&list->packet_lock, flags);
 471 }
 472
 473
 474 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
 475 {
 476         struct mousedev_list *list = file->private_data;
 477         unsigned char c;
 478         unsigned int i;
 479
 480         for (i = 0; i < count; i++) {
 481
 482                 if (get_user(c, buffer + i))
 483                         return -EFAULT;
 484
 485                 if (c == mousedev_imex_seq[list->imexseq]) {
 486                         if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
 487                                 list->imexseq = 0;
 488                                 list->mode = MOUSEDEV_EMUL_EXPS;
 489                         }
 490                 } else list->imexseq = 0;
 491
 492                 if (c == mousedev_imps_seq[list->impsseq]) {
 493                         if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
 494                                 list->impsseq = 0;
 495                                 list->mode = MOUSEDEV_EMUL_IMPS;
 496                         }
 497                 } else list->impsseq = 0;
 498
 499                 list->ps2[0] = 0xfa;
 500
 501                 switch (c) {
 502
 503                         case 0xeb: /* Poll */
 504                                 mousedev_packet(list, &list->ps2[1]);
 505                                 list->bufsiz++; /* account for leading ACK */
 506                                 break;
 507
 508                         case 0xf2: /* Get ID */
 509                                 switch (list->mode) {
 510                                         case MOUSEDEV_EMUL_PS2:  list->ps2[1] = 0; break;
 511                                         case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
 512                                         case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
 513                                 }
 514                                 list->bufsiz = 2;
 515                                 break;
 516
 517                         case 0xe9: /* Get info */
 518                                 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
 519                                 list->bufsiz = 4;
 520                                 break;
 521
 522                         case 0xff: /* Reset */
 523                                 list->impsseq = list->imexseq = 0;
 524                                 list->mode = MOUSEDEV_EMUL_PS2;
 525                                 list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
 526                                 list->bufsiz = 3;
 527                                 break;
 528
 529                         default:
 530                                 list->bufsiz = 1;
 531                                 break;
 532                 }
 533
 534                 list->buffer = list->bufsiz;
 535         }
 536
 537         kill_fasync(&list->fasync, SIGIO, POLL_IN);
 538
 539         wake_up_interruptible(&list->mousedev->wait);
 540
 541         return count;
 542 }
 543
 544 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
 545 {
 546         struct mousedev_list *list = file->private_data;
 547         int retval = 0;
 548
 549         if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
 550                 return -EAGAIN;
 551
 552         retval = wait_event_interruptible(list->mousedev->wait,
 553                                           !list->mousedev->exist || list->ready || list->buffer);
 554
 555         if (retval)
 556                 return retval;
 557
 558         if (!list->mousedev->exist)
 559                 return -ENODEV;
 560
 561         if (!list->buffer && list->ready) {
 562                 mousedev_packet(list, list->ps2);
 563                 list->buffer = list->bufsiz;
 564         }
 565
 566         if (count > list->buffer)
 567                 count = list->buffer;
 568
 569         list->buffer -= count;
 570
 571         if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
 572                 return -EFAULT;
 573
 574         return count;
 575 }
 576
 577 /* No kernel lock - fine */
 578 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
 579 {
 580         struct mousedev_list *list = file->private_data;
 581         poll_wait(file, &list->mousedev->wait, wait);
 582         if (list->ready || list->buffer)
 583                 return POLLIN | POLLRDNORM;
 584         return 0;
 585 }
 586
 587 struct file_operations mousedev_fops = {
 588         .owner =        THIS_MODULE,
 589         .read =         mousedev_read,
 590         .write =        mousedev_write,
 591         .poll =         mousedev_poll,
 592         .open =         mousedev_open,
 593         .release =      mousedev_release,
 594         .fasync =       mousedev_fasync,
 595 };
 596
 597 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 598 {
 599         struct mousedev *mousedev;
 600         int minor = 0;
 601
 602         for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
 603         if (minor == MOUSEDEV_MINORS) {
 604                 printk(KERN_ERR "mousedev: no more free mousedev devices\n");
 605                 return NULL;
 606         }
 607
 608         if (!(mousedev = kmalloc(sizeof(struct mousedev), GFP_KERNEL)))
 609                 return NULL;
 610         memset(mousedev, 0, sizeof(struct mousedev));
 611
 612         INIT_LIST_HEAD(&mousedev->list);
 613         init_waitqueue_head(&mousedev->wait);
 614
 615         mousedev->minor = minor;
 616         mousedev->exist = 1;
 617         mousedev->handle.dev = dev;
 618         mousedev->handle.name = mousedev->name;
 619         mousedev->handle.handler = handler;
 620         mousedev->handle.private = mousedev;
 621         sprintf(mousedev->name, "mouse%d", minor);
 622
 623         if (mousedev_mix.open)
 624                 input_open_device(&mousedev->handle);
 625
 626         mousedev_table[minor] = mousedev;
 627
 628         devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
 629                         S_IFCHR|S_IRUGO|S_IWUSR, "input/mouse%d", minor);
 630         class_simple_device_add(input_class,
 631                                 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
 632                                 dev->dev, "mouse%d", minor);
 633
 634         return &mousedev->handle;
 635 }
 636
 637 static void mousedev_disconnect(struct input_handle *handle)
 638 {
 639         struct mousedev *mousedev = handle->private;
 640
 641         class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor));
 642         devfs_remove("input/mouse%d", mousedev->minor);
 643         mousedev->exist = 0;
 644
 645         if (mousedev->open) {
 646                 input_close_device(handle);
 647         } else {
 648                 if (mousedev_mix.open)
 649                         input_close_device(handle);
 650                 mousedev_free(mousedev);
 651         }
 652 }
 653
 654 static struct input_device_id mousedev_ids[] = {
 655         {
 656                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
 657                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
 658                 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) },
 659                 .relbit = { BIT(REL_X) | BIT(REL_Y) },
 660         },      /* A mouse like device, at least one button, two relative axes */
 661         {
 662                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
 663                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
 664                 .relbit = { BIT(REL_WHEEL) },
 665         },      /* A separate scrollwheel */
 666         {
 667                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
 668                 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
 669                 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
 670                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) },
 671         },      /* A tablet like device, at least touch detection, two absolute axes */
 672         {
 673                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
 674                 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
 675                 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) },
 676                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) },
 677         },      /* A touchpad */
 678
 679         { },    /* Terminating entry */
 680 };
 681
 682 MODULE_DEVICE_TABLE(input, mousedev_ids);
 683
 684 static struct input_handler mousedev_handler = {
 685         .event =        mousedev_event,
 686         .connect =      mousedev_connect,
 687         .disconnect =   mousedev_disconnect,
 688         .fops =         &mousedev_fops,
 689         .minor =        MOUSEDEV_MINOR_BASE,
 690         .name =         "mousedev",
 691         .id_table =     mousedev_ids,
 692 };
 693
 694 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 695 static struct miscdevice psaux_mouse = {
 696         PSMOUSE_MINOR, "psaux", &mousedev_fops
 697 };
 698 static int psaux_registered;
 699 #endif
 700
 701 static int __init mousedev_init(void)
 702 {
 703         input_register_handler(&mousedev_handler);
 704
 705         memset(&mousedev_mix, 0, sizeof(struct mousedev));
 706         INIT_LIST_HEAD(&mousedev_mix.list);
 707         init_waitqueue_head(&mousedev_mix.wait);
 708         mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
 709         mousedev_mix.exist = 1;
 710         mousedev_mix.minor = MOUSEDEV_MIX;
 711
 712         devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
 713                         S_IFCHR|S_IRUGO|S_IWUSR, "input/mice");
 714         class_simple_device_add(input_class, MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
 715                                 NULL, "mice");
 716
 717 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 718         if (!(psaux_registered = !misc_register(&psaux_mouse)))
 719                 printk(KERN_WARNING "mice: could not misc_register the device\n");
 720 #endif
 721
 722         printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
 723
 724         return 0;
 725 }
 726
 727 static void __exit mousedev_exit(void)
 728 {
 729 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 730         if (psaux_registered)
 731                 misc_deregister(&psaux_mouse);
 732 #endif
 733         devfs_remove("input/mice");
 734         class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX));
 735         input_unregister_handler(&mousedev_handler);
 736 }
 737
 738 module_init(mousedev_init);
 739 module_exit(mousedev_exit);