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 input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
 119 {
 120         int size;
 121
 122         if (mousedev->touch) {
 123                 switch (code) {
 124                         case ABS_X:
 125                                 size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
 126                                 if (size == 0) size = xres;
 127                                 fx(0) = value;
 128                                 if (mousedev->pkt_count >= 2)
 129                                         mousedev->packet.dx = ((fx(0) - fx(1)) / 2 + (fx(1) - fx(2)) / 2) * xres / (size * 2);
 130                                 break;
 131
 132                         case ABS_Y:
 133                                 size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
 134                                 if (size == 0) size = yres;
 135                                 fy(0) = value;
 136                                 if (mousedev->pkt_count >= 2)
 137                                         mousedev->packet.dy = -((fy(0) - fy(1)) / 2 + (fy(1) - fy(2)) / 2) * yres / (size * 2);
 138                                 break;
 139                 }
 140         }
 141 }
 142
 143 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
 144 {
 145         int size;
 146
 147         switch (code) {
 148                 case ABS_X:
 149                         size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
 150                         if (size == 0) size = xres;
 151                         if (value > dev->absmax[ABS_X]) value = dev->absmax[ABS_X];
 152                         if (value < dev->absmin[ABS_X]) value = dev->absmin[ABS_X];
 153                         mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size;
 154                         mousedev->packet.abs_event = 1;
 155                         break;
 156
 157                 case ABS_Y:
 158                         size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
 159                         if (size == 0) size = yres;
 160                         if (value > dev->absmax[ABS_Y]) value = dev->absmax[ABS_Y];
 161                         if (value < dev->absmin[ABS_Y]) value = dev->absmin[ABS_Y];
 162                         mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size;
 163                         mousedev->packet.abs_event = 1;
 164                         break;
 165         }
 166 }
 167
 168 static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value)
 169 {
 170         switch (code) {
 171                 case REL_X:     mousedev->packet.dx += value; break;
 172                 case REL_Y:     mousedev->packet.dy -= value; break;
 173                 case REL_WHEEL: mousedev->packet.dz -= value; break;
 174         }
 175 }
 176
 177 static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value)
 178 {
 179         int index;
 180
 181         switch (code) {
 182                 case BTN_TOUCH:
 183                 case BTN_0:
 184                 case BTN_FORWARD:
 185                 case BTN_LEFT:          index = 0; break;
 186                 case BTN_STYLUS:
 187                 case BTN_1:
 188                 case BTN_RIGHT:         index = 1; break;
 189                 case BTN_2:
 190                 case BTN_STYLUS2:
 191                 case BTN_MIDDLE:        index = 2; break;
 192                 case BTN_3:
 193                 case BTN_BACK:
 194                 case BTN_SIDE:          index = 3; break;
 195                 case BTN_4:
 196                 case BTN_EXTRA:         index = 4; break;
 197                 default:                return;
 198         }
 199
 200         if (value) {
 201                 set_bit(index, &mousedev->packet.buttons);
 202                 set_bit(index, &mousedev_mix.packet.buttons);
 203         } else {
 204                 clear_bit(index, &mousedev->packet.buttons);
 205                 clear_bit(index, &mousedev_mix.packet.buttons);
 206         }
 207 }
 208
 209 static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet)
 210 {
 211         struct mousedev_list *list;
 212         struct mousedev_motion *p;
 213         unsigned long flags;
 214
 215         list_for_each_entry(list, &mousedev->list, node) {
 216                 spin_lock_irqsave(&list->packet_lock, flags);
 217
 218                 p = &list->packets[list->head];
 219                 if (list->ready && p->buttons != packet->buttons) {
 220                         unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN;
 221                         if (new_head != list->tail) {
 222                                 p = &list->packets[list->head = new_head];
 223                                 memset(p, 0, sizeof(struct mousedev_motion));
 224                         }
 225                 }
 226
 227                 if (packet->abs_event) {
 228                         p->dx += packet->x - list->pos_x;
 229                         p->dy += packet->y - list->pos_y;
 230                         list->pos_x = packet->x;
 231                         list->pos_y = packet->y;
 232                 }
 233
 234                 list->pos_x += packet->dx;
 235                 list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x);
 236                 list->pos_y += packet->dy;
 237                 list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y);
 238
 239                 p->dx += packet->dx;
 240                 p->dy += packet->dy;
 241                 p->dz += packet->dz;
 242                 p->buttons = mousedev->packet.buttons;
 243
 244                 list->ready = 1;
 245
 246                 spin_unlock_irqrestore(&list->packet_lock, flags);
 247                 kill_fasync(&list->fasync, SIGIO, POLL_IN);
 248         }
 249
 250         wake_up_interruptible(&mousedev->wait);
 251 }
 252
 253 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
 254 {
 255         if (!value) {
 256                 if (mousedev->touch &&
 257                     time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) {
 258                         /*
 259                          * Toggle left button to emulate tap.
 260                          * We rely on the fact that mousedev_mix always has 0
 261                          * motion packet so we won't mess current position.
 262                          */
 263                         set_bit(0, &mousedev->packet.buttons);
 264                         set_bit(0, &mousedev_mix.packet.buttons);
 265                         mousedev_notify_readers(mousedev, &mousedev_mix.packet);
 266                         mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet);
 267                         clear_bit(0, &mousedev->packet.buttons);
 268                         clear_bit(0, &mousedev_mix.packet.buttons);
 269                 }
 270                 mousedev->touch = mousedev->pkt_count = 0;
 271         }
 272         else
 273                 if (!mousedev->touch)
 274                         mousedev->touch = jiffies;
 275 }
 276
 277 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
 278 {
 279         struct mousedev *mousedev = handle->private;
 280
 281         switch (type) {
 282                 case EV_ABS:
 283                         /* Ignore joysticks */
 284                         if (test_bit(BTN_TRIGGER, handle->dev->keybit))
 285                                 return;
 286
 287                         if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
 288                                 mousedev_touchpad_event(handle->dev, mousedev, code, value);
 289                         else
 290                                 mousedev_abs_event(handle->dev, mousedev, code, value);
 291
 292                         break;
 293
 294                 case EV_REL:
 295                         mousedev_rel_event(mousedev, code, value);
 296                         break;
 297
 298                 case EV_KEY:
 299                         if (value != 2) {
 300                                 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
 301                                         mousedev_touchpad_touch(mousedev, value);
 302                                 else
 303                                         mousedev_key_event(mousedev, code, value);
 304                         }
 305                         break;
 306
 307                 case EV_SYN:
 308                         if (code == SYN_REPORT) {
 309                                 if (mousedev->touch) {
 310                                         mousedev->pkt_count++;
 311                                         /* Input system eats duplicate events, but we need all of them
 312                                          * to do correct averaging so apply present one forward
 313                                          */
 314                                         fx(0) = fx(1);
 315                                         fy(0) = fy(1);
 316                                 }
 317
 318                                 mousedev_notify_readers(mousedev, &mousedev->packet);
 319                                 mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
 320
 321                                 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0;
 322                                 mousedev->packet.abs_event = 0;
 323                         }
 324                         break;
 325         }
 326 }
 327
 328 static int mousedev_fasync(int fd, struct file *file, int on)
 329 {
 330         int retval;
 331         struct mousedev_list *list = file->private_data;
 332         retval = fasync_helper(fd, file, on, &list->fasync);
 333         return retval < 0 ? retval : 0;
 334 }
 335
 336 static void mousedev_free(struct mousedev *mousedev)
 337 {
 338         mousedev_table[mousedev->minor] = NULL;
 339         kfree(mousedev);
 340 }
 341
 342 static int mixdev_release(void)
 343 {
 344         struct input_handle *handle;
 345
 346         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
 347                 struct mousedev *mousedev = handle->private;
 348
 349                 if (!mousedev->open) {
 350                         if (mousedev->exist)
 351                                 input_close_device(&mousedev->handle);
 352                         else
 353                                 mousedev_free(mousedev);
 354                 }
 355         }
 356
 357         return 0;
 358 }
 359
 360 static int mousedev_release(struct inode * inode, struct file * file)
 361 {
 362         struct mousedev_list *list = file->private_data;
 363
 364         mousedev_fasync(-1, file, 0);
 365
 366         list_del(&list->node);
 367
 368         if (!--list->mousedev->open) {
 369                 if (list->mousedev->minor == MOUSEDEV_MIX)
 370                         return mixdev_release();
 371
 372                 if (!mousedev_mix.open) {
 373                         if (list->mousedev->exist)
 374                                 input_close_device(&list->mousedev->handle);
 375                         else
 376                                 mousedev_free(list->mousedev);
 377                 }
 378         }
 379
 380         kfree(list);
 381         return 0;
 382 }
 383
 384 static int mousedev_open(struct inode * inode, struct file * file)
 385 {
 386         struct mousedev_list *list;
 387         struct input_handle *handle;
 388         struct mousedev *mousedev;
 389         int i;
 390
 391 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 392         if (imajor(inode) == MISC_MAJOR)
 393                 i = MOUSEDEV_MIX;
 394         else
 395 #endif
 396                 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
 397
 398         if (i >= MOUSEDEV_MINORS || !mousedev_table[i])
 399                 return -ENODEV;
 400
 401         if (!(list = kmalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
 402                 return -ENOMEM;
 403         memset(list, 0, sizeof(struct mousedev_list));
 404
 405         spin_lock_init(&list->packet_lock);
 406         list->pos_x = xres / 2;
 407         list->pos_y = yres / 2;
 408         list->mousedev = mousedev_table[i];
 409         list_add_tail(&list->node, &mousedev_table[i]->list);
 410         file->private_data = list;
 411
 412         if (!list->mousedev->open++) {
 413                 if (list->mousedev->minor == MOUSEDEV_MIX) {
 414                         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
 415                                 mousedev = handle->private;
 416                                 if (!mousedev->open && mousedev->exist)
 417                                         input_open_device(handle);
 418                         }
 419                 } else
 420                         if (!mousedev_mix.open && list->mousedev->exist)
 421                                 input_open_device(&list->mousedev->handle);
 422         }
 423
 424         return 0;
 425 }
 426
 427 static inline int mousedev_limit_delta(int delta, int limit)
 428 {
 429         return delta > limit ? limit : (delta < -limit ? -limit : delta);
 430 }
 431
 432 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
 433 {
 434         struct mousedev_motion *p;
 435         unsigned long flags;
 436
 437         spin_lock_irqsave(&list->packet_lock, flags);
 438         p = &list->packets[list->tail];
 439
 440         ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
 441         ps2_data[1] = mousedev_limit_delta(p->dx, 127);
 442         ps2_data[2] = mousedev_limit_delta(p->dy, 127);
 443         p->dx -= ps2_data[1];
 444         p->dy -= ps2_data[2];
 445
 446         switch (list->mode) {
 447                 case MOUSEDEV_EMUL_EXPS:
 448                         ps2_data[3] = mousedev_limit_delta(p->dz, 127);
 449                         p->dz -= ps2_data[3];
 450                         ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
 451                         list->bufsiz = 4;
 452                         break;
 453
 454                 case MOUSEDEV_EMUL_IMPS:
 455                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
 456                         ps2_data[3] = mousedev_limit_delta(p->dz, 127);
 457                         p->dz -= ps2_data[3];
 458                         list->bufsiz = 4;
 459                         break;
 460
 461                 case MOUSEDEV_EMUL_PS2:
 462                 default:
 463                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
 464                         p->dz = 0;
 465                         list->bufsiz = 3;
 466                         break;
 467         }
 468
 469         if (!p->dx && !p->dy && !p->dz) {
 470                 if (list->tail == list->head)
 471                         list->ready = 0;
 472                 else
 473                         list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
 474         }
 475
 476         spin_unlock_irqrestore(&list->packet_lock, flags);
 477 }
 478
 479
 480 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
 481 {
 482         struct mousedev_list *list = file->private_data;
 483         unsigned char c;
 484         unsigned int i;
 485
 486         for (i = 0; i < count; i++) {
 487
 488                 if (get_user(c, buffer + i))
 489                         return -EFAULT;
 490
 491                 if (c == mousedev_imex_seq[list->imexseq]) {
 492                         if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
 493                                 list->imexseq = 0;
 494                                 list->mode = MOUSEDEV_EMUL_EXPS;
 495                         }
 496                 } else list->imexseq = 0;
 497
 498                 if (c == mousedev_imps_seq[list->impsseq]) {
 499                         if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
 500                                 list->impsseq = 0;
 501                                 list->mode = MOUSEDEV_EMUL_IMPS;
 502                         }
 503                 } else list->impsseq = 0;
 504
 505                 list->ps2[0] = 0xfa;
 506
 507                 switch (c) {
 508
 509                         case 0xeb: /* Poll */
 510                                 mousedev_packet(list, &list->ps2[1]);
 511                                 list->bufsiz++; /* account for leading ACK */
 512                                 break;
 513
 514                         case 0xf2: /* Get ID */
 515                                 switch (list->mode) {
 516                                         case MOUSEDEV_EMUL_PS2:  list->ps2[1] = 0; break;
 517                                         case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
 518                                         case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
 519                                 }
 520                                 list->bufsiz = 2;
 521                                 break;
 522
 523                         case 0xe9: /* Get info */
 524                                 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
 525                                 list->bufsiz = 4;
 526                                 break;
 527
 528                         case 0xff: /* Reset */
 529                                 list->impsseq = list->imexseq = 0;
 530                                 list->mode = MOUSEDEV_EMUL_PS2;
 531                                 list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
 532                                 list->bufsiz = 3;
 533                                 break;
 534
 535                         default:
 536                                 list->bufsiz = 1;
 537                                 break;
 538                 }
 539
 540                 list->buffer = list->bufsiz;
 541         }
 542
 543         kill_fasync(&list->fasync, SIGIO, POLL_IN);
 544
 545         wake_up_interruptible(&list->mousedev->wait);
 546
 547         return count;
 548 }
 549
 550 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
 551 {
 552         struct mousedev_list *list = file->private_data;
 553         int retval = 0;
 554
 555         if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
 556                 return -EAGAIN;
 557
 558         retval = wait_event_interruptible(list->mousedev->wait,
 559                                           !list->mousedev->exist || list->ready || list->buffer);
 560
 561         if (retval)
 562                 return retval;
 563
 564         if (!list->mousedev->exist)
 565                 return -ENODEV;
 566
 567         if (!list->buffer && list->ready) {
 568                 mousedev_packet(list, list->ps2);
 569                 list->buffer = list->bufsiz;
 570         }
 571
 572         if (count > list->buffer)
 573                 count = list->buffer;
 574
 575         list->buffer -= count;
 576
 577         if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
 578                 return -EFAULT;
 579
 580         return count;
 581 }
 582
 583 /* No kernel lock - fine */
 584 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
 585 {
 586         struct mousedev_list *list = file->private_data;
 587         poll_wait(file, &list->mousedev->wait, wait);
 588         if (list->ready || list->buffer)
 589                 return POLLIN | POLLRDNORM;
 590         return 0;
 591 }
 592
 593 struct file_operations mousedev_fops = {
 594         .owner =        THIS_MODULE,
 595         .read =         mousedev_read,
 596         .write =        mousedev_write,
 597         .poll =         mousedev_poll,
 598         .open =         mousedev_open,
 599         .release =      mousedev_release,
 600         .fasync =       mousedev_fasync,
 601 };
 602
 603 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 604 {
 605         struct mousedev *mousedev;
 606         int minor = 0;
 607
 608         for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
 609         if (minor == MOUSEDEV_MINORS) {
 610                 printk(KERN_ERR "mousedev: no more free mousedev devices\n");
 611                 return NULL;
 612         }
 613
 614         if (!(mousedev = kmalloc(sizeof(struct mousedev), GFP_KERNEL)))
 615                 return NULL;
 616         memset(mousedev, 0, sizeof(struct mousedev));
 617
 618         INIT_LIST_HEAD(&mousedev->list);
 619         init_waitqueue_head(&mousedev->wait);
 620
 621         mousedev->minor = minor;
 622         mousedev->exist = 1;
 623         mousedev->handle.dev = dev;
 624         mousedev->handle.name = mousedev->name;
 625         mousedev->handle.handler = handler;
 626         mousedev->handle.private = mousedev;
 627         sprintf(mousedev->name, "mouse%d", minor);
 628
 629         if (mousedev_mix.open)
 630                 input_open_device(&mousedev->handle);
 631
 632         mousedev_table[minor] = mousedev;
 633
 634         devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
 635                         S_IFCHR|S_IRUGO|S_IWUSR, "input/mouse%d", minor);
 636         class_simple_device_add(input_class,
 637                                 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
 638                                 dev->dev, "mouse%d", minor);
 639
 640         return &mousedev->handle;
 641 }
 642
 643 static void mousedev_disconnect(struct input_handle *handle)
 644 {
 645         struct mousedev *mousedev = handle->private;
 646
 647         class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor));
 648         devfs_remove("input/mouse%d", mousedev->minor);
 649         mousedev->exist = 0;
 650
 651         if (mousedev->open) {
 652                 input_close_device(handle);
 653         } else {
 654                 if (mousedev_mix.open)
 655                         input_close_device(handle);
 656                 mousedev_free(mousedev);
 657         }
 658 }
 659
 660 static struct input_device_id mousedev_ids[] = {
 661         {
 662                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
 663                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
 664                 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) },
 665                 .relbit = { BIT(REL_X) | BIT(REL_Y) },
 666         },      /* A mouse like device, at least one button, two relative axes */
 667         {
 668                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
 669                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
 670                 .relbit = { BIT(REL_WHEEL) },
 671         },      /* A separate scrollwheel */
 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_TOUCH)] = BIT(BTN_TOUCH) },
 676                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) },
 677         },      /* A tablet like device, at least touch detection, two absolute axes */
 678         {
 679                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
 680                 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
 681                 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) },
 682                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) },
 683         },      /* A touchpad */
 684
 685         { },    /* Terminating entry */
 686 };
 687
 688 MODULE_DEVICE_TABLE(input, mousedev_ids);
 689
 690 static struct input_handler mousedev_handler = {
 691         .event =        mousedev_event,
 692         .connect =      mousedev_connect,
 693         .disconnect =   mousedev_disconnect,
 694         .fops =         &mousedev_fops,
 695         .minor =        MOUSEDEV_MINOR_BASE,
 696         .name =         "mousedev",
 697         .id_table =     mousedev_ids,
 698 };
 699
 700 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 701 static struct miscdevice psaux_mouse = {
 702         PSMOUSE_MINOR, "psaux", &mousedev_fops
 703 };
 704 static int psaux_registered;
 705 #endif
 706
 707 static int __init mousedev_init(void)
 708 {
 709         input_register_handler(&mousedev_handler);
 710
 711         memset(&mousedev_mix, 0, sizeof(struct mousedev));
 712         INIT_LIST_HEAD(&mousedev_mix.list);
 713         init_waitqueue_head(&mousedev_mix.wait);
 714         mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
 715         mousedev_mix.exist = 1;
 716         mousedev_mix.minor = MOUSEDEV_MIX;
 717
 718         devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
 719                         S_IFCHR|S_IRUGO|S_IWUSR, "input/mice");
 720         class_simple_device_add(input_class, MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
 721                                 NULL, "mice");
 722
 723 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 724         if (!(psaux_registered = !misc_register(&psaux_mouse)))
 725                 printk(KERN_WARNING "mice: could not misc_register the device\n");
 726 #endif
 727
 728         printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
 729
 730         return 0;
 731 }
 732
 733 static void __exit mousedev_exit(void)
 734 {
 735 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 736         if (psaux_registered)
 737                 misc_deregister(&psaux_mouse);
 738 #endif
 739         devfs_remove("input/mice");
 740         class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX));
 741         input_unregister_handler(&mousedev_handler);
 742 }
 743
 744 module_init(mousedev_init);
 745 module_exit(mousedev_exit);