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         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);