SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/input/joydev.c

   1 /*
   2  * Joystick device driver for the input driver suite.
   3  *
   4  * Copyright (c) 1999-2002 Vojtech Pavlik
   5  * Copyright (c) 1999 Colin Van Dyke
   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 as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  */
  12
  13 #include <asm/io.h>
  14 #include <asm/system.h>
  15 #include <linux/delay.h>
  16 #include <linux/errno.h>
  17 #include <linux/joystick.h>
  18 #include <linux/input.h>
  19 #include <linux/kernel.h>
  20 #include <linux/major.h>
  21 #include <linux/slab.h>
  22 #include <linux/mm.h>
  23 #include <linux/miscdevice.h>
  24 #include <linux/module.h>
  25 #include <linux/poll.h>
  26 #include <linux/init.h>
  27 #include <linux/smp_lock.h>
  28 #include <linux/device.h>
  29
  30 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  31 MODULE_DESCRIPTION("Joystick device interfaces");
  32 MODULE_SUPPORTED_DEVICE("input/js");
  33 MODULE_LICENSE("GPL");
  34
  35 #define JOYDEV_MINOR_BASE       0
  36 #define JOYDEV_MINORS           16
  37 #define JOYDEV_BUFFER_SIZE      64
  38
  39 struct joydev {
  40         int exist;
  41         int open;
  42         int minor;
  43         char name[16];
  44         struct input_handle handle;
  45         wait_queue_head_t wait;
  46         struct list_head client_list;
  47         struct js_corr corr[ABS_MAX + 1];
  48         struct JS_DATA_SAVE_TYPE glue;
  49         int nabs;
  50         int nkey;
  51         __u16 keymap[KEY_MAX - BTN_MISC + 1];
  52         __u16 keypam[KEY_MAX - BTN_MISC + 1];
  53         __u8 absmap[ABS_MAX + 1];
  54         __u8 abspam[ABS_MAX + 1];
  55         __s16 abs[ABS_MAX + 1];
  56 };
  57
  58 struct joydev_client {
  59         struct js_event buffer[JOYDEV_BUFFER_SIZE];
  60         int head;
  61         int tail;
  62         int startup;
  63         struct fasync_struct *fasync;
  64         struct joydev *joydev;
  65         struct list_head node;
  66 };
  67
  68 static struct joydev *joydev_table[JOYDEV_MINORS];
  69
  70 static int joydev_correct(int value, struct js_corr *corr)
  71 {
  72         switch (corr->type) {
  73                 case JS_CORR_NONE:
  74                         break;
  75                 case JS_CORR_BROKEN:
  76                         value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 :
  77                                 ((corr->coef[3] * (value - corr->coef[1])) >> 14)) :
  78                                 ((corr->coef[2] * (value - corr->coef[0])) >> 14);
  79                         break;
  80                 default:
  81                         return 0;
  82         }
  83
  84         return value < -32767 ? -32767 : (value > 32767 ? 32767 : value);
  85 }
  86
  87 static void joydev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
  88 {
  89         struct joydev *joydev = handle->private;
  90         struct joydev_client *client;
  91         struct js_event event;
  92
  93         switch (type) {
  94
  95                 case EV_KEY:
  96                         if (code < BTN_MISC || value == 2)
  97                                 return;
  98                         event.type = JS_EVENT_BUTTON;
  99                         event.number = joydev->keymap[code - BTN_MISC];
 100                         event.value = value;
 101                         break;
 102
 103                 case EV_ABS:
 104                         event.type = JS_EVENT_AXIS;
 105                         event.number = joydev->absmap[code];
 106                         event.value = joydev_correct(value, joydev->corr + event.number);
 107                         if (event.value == joydev->abs[event.number])
 108                                 return;
 109                         joydev->abs[event.number] = event.value;
 110                         break;
 111
 112                 default:
 113                         return;
 114         }
 115
 116         event.time = jiffies_to_msecs(jiffies);
 117
 118         list_for_each_entry(client, &joydev->client_list, node) {
 119
 120                 memcpy(client->buffer + client->head, &event, sizeof(struct js_event));
 121
 122                 if (client->startup == joydev->nabs + joydev->nkey)
 123                         if (client->tail == (client->head = (client->head + 1) & (JOYDEV_BUFFER_SIZE - 1)))
 124                                 client->startup = 0;
 125
 126                 kill_fasync(&client->fasync, SIGIO, POLL_IN);
 127         }
 128
 129         wake_up_interruptible(&joydev->wait);
 130 }
 131
 132 static int joydev_fasync(int fd, struct file *file, int on)
 133 {
 134         int retval;
 135         struct joydev_client *client = file->private_data;
 136
 137         retval = fasync_helper(fd, file, on, &client->fasync);
 138
 139         return retval < 0 ? retval : 0;
 140 }
 141
 142 static void joydev_free(struct joydev *joydev)
 143 {
 144         joydev_table[joydev->minor] = NULL;
 145         kfree(joydev);
 146 }
 147
 148 static int joydev_release(struct inode *inode, struct file *file)
 149 {
 150         struct joydev_client *client = file->private_data;
 151         struct joydev *joydev = client->joydev;
 152
 153         joydev_fasync(-1, file, 0);
 154
 155         list_del(&client->node);
 156         kfree(client);
 157
 158         if (!--joydev->open) {
 159                 if (joydev->exist)
 160                         input_close_device(&joydev->handle);
 161                 else
 162                         joydev_free(joydev);
 163         }
 164
 165         return 0;
 166 }
 167
 168 static int joydev_open(struct inode *inode, struct file *file)
 169 {
 170         struct joydev_client *client;
 171         struct joydev *joydev;
 172         int i = iminor(inode) - JOYDEV_MINOR_BASE;
 173
 174         if (i >= JOYDEV_MINORS)
 175                 return -ENODEV;
 176
 177         joydev = joydev_table[i];
 178         if (!joydev || !joydev->exist)
 179                 return -ENODEV;
 180
 181         client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
 182         if (!client)
 183                 return -ENOMEM;
 184
 185         client->joydev = joydev;
 186         list_add_tail(&client->node, &joydev->client_list);
 187
 188         if (!joydev->open++ && joydev->exist)
 189                 input_open_device(&joydev->handle);
 190
 191         file->private_data = client;
 192         return 0;
 193 }
 194
 195 static ssize_t joydev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
 196 {
 197         return -EINVAL;
 198 }
 199
 200 static ssize_t joydev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 201 {
 202         struct joydev_client *client = file->private_data;
 203         struct joydev *joydev = client->joydev;
 204         struct input_dev *input = joydev->handle.dev;
 205         int retval = 0;
 206
 207         if (!joydev->exist)
 208                 return -ENODEV;
 209
 210         if (count < sizeof(struct js_event))
 211                 return -EINVAL;
 212
 213         if (count == sizeof(struct JS_DATA_TYPE)) {
 214
 215                 struct JS_DATA_TYPE data;
 216                 int i;
 217
 218                 for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
 219                         data.buttons |= test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
 220                 data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
 221                 data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;
 222
 223                 if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
 224                         return -EFAULT;
 225
 226                 client->startup = 0;
 227                 client->tail = client->head;
 228
 229                 return sizeof(struct JS_DATA_TYPE);
 230         }
 231
 232         if (client->startup == joydev->nabs + joydev->nkey &&
 233             client->head == client->tail && (file->f_flags & O_NONBLOCK))
 234                 return -EAGAIN;
 235
 236         retval = wait_event_interruptible(joydev->wait,
 237                                           !joydev->exist ||
 238                                           client->startup < joydev->nabs + joydev->nkey ||
 239                                           client->head != client->tail);
 240         if (retval)
 241                 return retval;
 242
 243         if (!joydev->exist)
 244                 return -ENODEV;
 245
 246         while (client->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) {
 247
 248                 struct js_event event;
 249
 250                 event.time = jiffies_to_msecs(jiffies);
 251
 252                 if (client->startup < joydev->nkey) {
 253                         event.type = JS_EVENT_BUTTON | JS_EVENT_INIT;
 254                         event.number = client->startup;
 255                         event.value = !!test_bit(joydev->keypam[event.number], input->key);
 256                 } else {
 257                         event.type = JS_EVENT_AXIS | JS_EVENT_INIT;
 258                         event.number = client->startup - joydev->nkey;
 259                         event.value = joydev->abs[event.number];
 260                 }
 261
 262                 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
 263                         return -EFAULT;
 264
 265                 client->startup++;
 266                 retval += sizeof(struct js_event);
 267         }
 268
 269         while (client->head != client->tail && retval + sizeof(struct js_event) <= count) {
 270
 271                 if (copy_to_user(buf + retval, client->buffer + client->tail, sizeof(struct js_event)))
 272                         return -EFAULT;
 273
 274                 client->tail = (client->tail + 1) & (JOYDEV_BUFFER_SIZE - 1);
 275                 retval += sizeof(struct js_event);
 276         }
 277
 278         return retval;
 279 }
 280
 281 /* No kernel lock - fine */
 282 static unsigned int joydev_poll(struct file *file, poll_table *wait)
 283 {
 284         struct joydev_client *client = file->private_data;
 285         struct joydev *joydev = client->joydev;
 286
 287         poll_wait(file, &joydev->wait, wait);
 288         return ((client->head != client->tail || client->startup < joydev->nabs + joydev->nkey) ?
 289                 (POLLIN | POLLRDNORM) : 0) | (joydev->exist ? 0 : (POLLHUP | POLLERR));
 290 }
 291
 292 static int joydev_ioctl_common(struct joydev *joydev, unsigned int cmd, void __user *argp)
 293 {
 294         struct input_dev *dev = joydev->handle.dev;
 295         int i, j;
 296
 297         switch (cmd) {
 298
 299                 case JS_SET_CAL:
 300                         return copy_from_user(&joydev->glue.JS_CORR, argp,
 301                                 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
 302
 303                 case JS_GET_CAL:
 304                         return copy_to_user(argp, &joydev->glue.JS_CORR,
 305                                 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
 306
 307                 case JS_SET_TIMEOUT:
 308                         return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
 309
 310                 case JS_GET_TIMEOUT:
 311                         return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
 312
 313                 case JSIOCGVERSION:
 314                         return put_user(JS_VERSION, (__u32 __user *) argp);
 315
 316                 case JSIOCGAXES:
 317                         return put_user(joydev->nabs, (__u8 __user *) argp);
 318
 319                 case JSIOCGBUTTONS:
 320                         return put_user(joydev->nkey, (__u8 __user *) argp);
 321
 322                 case JSIOCSCORR:
 323                         if (copy_from_user(joydev->corr, argp,
 324                                       sizeof(joydev->corr[0]) * joydev->nabs))
 325                             return -EFAULT;
 326                         for (i = 0; i < joydev->nabs; i++) {
 327                                 j = joydev->abspam[i];
 328                                 joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
 329                         }
 330                         return 0;
 331
 332                 case JSIOCGCORR:
 333                         return copy_to_user(argp, joydev->corr,
 334                                                 sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
 335
 336                 case JSIOCSAXMAP:
 337                         if (copy_from_user(joydev->abspam, argp, sizeof(__u8) * (ABS_MAX + 1)))
 338                                 return -EFAULT;
 339                         for (i = 0; i < joydev->nabs; i++) {
 340                                 if (joydev->abspam[i] > ABS_MAX)
 341                                         return -EINVAL;
 342                                 joydev->absmap[joydev->abspam[i]] = i;
 343                         }
 344                         return 0;
 345
 346                 case JSIOCGAXMAP:
 347                         return copy_to_user(argp, joydev->abspam,
 348                                                 sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0;
 349
 350                 case JSIOCSBTNMAP:
 351                         if (copy_from_user(joydev->keypam, argp, sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)))
 352                                 return -EFAULT;
 353                         for (i = 0; i < joydev->nkey; i++) {
 354                                 if (joydev->keypam[i] > KEY_MAX || joydev->keypam[i] < BTN_MISC)
 355                                         return -EINVAL;
 356                                 joydev->keymap[joydev->keypam[i] - BTN_MISC] = i;
 357                         }
 358                         return 0;
 359
 360                 case JSIOCGBTNMAP:
 361                         return copy_to_user(argp, joydev->keypam,
 362                                                 sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0;
 363
 364                 default:
 365                         if ((cmd & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) == JSIOCGNAME(0)) {
 366                                 int len;
 367                                 if (!dev->name)
 368                                         return 0;
 369                                 len = strlen(dev->name) + 1;
 370                                 if (len > _IOC_SIZE(cmd))
 371                                         len = _IOC_SIZE(cmd);
 372                                 if (copy_to_user(argp, dev->name, len))
 373                                         return -EFAULT;
 374                                 return len;
 375                         }
 376         }
 377         return -EINVAL;
 378 }
 379
 380 #ifdef CONFIG_COMPAT
 381 static long joydev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 382 {
 383         struct joydev_client *client = file->private_data;
 384         struct joydev *joydev = client->joydev;
 385         void __user *argp = (void __user *)arg;
 386         s32 tmp32;
 387         struct JS_DATA_SAVE_TYPE_32 ds32;
 388         int err;
 389
 390         if (!joydev->exist)
 391                 return -ENODEV;
 392
 393         switch(cmd) {
 394         case JS_SET_TIMELIMIT:
 395                 err = get_user(tmp32, (s32 __user *) arg);
 396                 if (err == 0)
 397                         joydev->glue.JS_TIMELIMIT = tmp32;
 398                 break;
 399         case JS_GET_TIMELIMIT:
 400                 tmp32 = joydev->glue.JS_TIMELIMIT;
 401                 err = put_user(tmp32, (s32 __user *) arg);
 402                 break;
 403
 404         case JS_SET_ALL:
 405                 err = copy_from_user(&ds32, argp,
 406                                      sizeof(ds32)) ? -EFAULT : 0;
 407                 if (err == 0) {
 408                         joydev->glue.JS_TIMEOUT    = ds32.JS_TIMEOUT;
 409                         joydev->glue.BUSY          = ds32.BUSY;
 410                         joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
 411                         joydev->glue.JS_TIMELIMIT  = ds32.JS_TIMELIMIT;
 412                         joydev->glue.JS_SAVE       = ds32.JS_SAVE;
 413                         joydev->glue.JS_CORR       = ds32.JS_CORR;
 414                 }
 415                 break;
 416
 417         case JS_GET_ALL:
 418                 ds32.JS_TIMEOUT    = joydev->glue.JS_TIMEOUT;
 419                 ds32.BUSY          = joydev->glue.BUSY;
 420                 ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
 421                 ds32.JS_TIMELIMIT  = joydev->glue.JS_TIMELIMIT;
 422                 ds32.JS_SAVE       = joydev->glue.JS_SAVE;
 423                 ds32.JS_CORR       = joydev->glue.JS_CORR;
 424
 425                 err = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
 426                 break;
 427
 428         default:
 429                 err = joydev_ioctl_common(joydev, cmd, argp);
 430         }
 431         return err;
 432 }
 433 #endif /* CONFIG_COMPAT */
 434
 435 static int joydev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 436 {
 437         struct joydev_client *client = file->private_data;
 438         struct joydev *joydev = client->joydev;
 439         void __user *argp = (void __user *)arg;
 440
 441         if (!joydev->exist)
 442                 return -ENODEV;
 443
 444         switch(cmd) {
 445                 case JS_SET_TIMELIMIT:
 446                         return get_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
 447                 case JS_GET_TIMELIMIT:
 448                         return put_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
 449                 case JS_SET_ALL:
 450                         return copy_from_user(&joydev->glue, argp,
 451                                                 sizeof(joydev->glue)) ? -EFAULT : 0;
 452                 case JS_GET_ALL:
 453                         return copy_to_user(argp, &joydev->glue,
 454                                                 sizeof(joydev->glue)) ? -EFAULT : 0;
 455                 default:
 456                         return joydev_ioctl_common(joydev, cmd, argp);
 457         }
 458 }
 459
 460 static const struct file_operations joydev_fops = {
 461         .owner =        THIS_MODULE,
 462         .read =         joydev_read,
 463         .write =        joydev_write,
 464         .poll =         joydev_poll,
 465         .open =         joydev_open,
 466         .release =      joydev_release,
 467         .ioctl =        joydev_ioctl,
 468 #ifdef CONFIG_COMPAT
 469         .compat_ioctl = joydev_compat_ioctl,
 470 #endif
 471         .fasync =       joydev_fasync,
 472 };
 473
 474 static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
 475                           const struct input_device_id *id)
 476 {
 477         struct joydev *joydev;
 478         struct class_device *cdev;
 479         dev_t devt;
 480         int i, j, t, minor;
 481         int error;
 482
 483         for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++);
 484         if (minor == JOYDEV_MINORS) {
 485                 printk(KERN_ERR "joydev: no more free joydev devices\n");
 486                 return -ENFILE;
 487         }
 488
 489         joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
 490         if (!joydev)
 491                 return -ENOMEM;
 492
 493         INIT_LIST_HEAD(&joydev->client_list);
 494         init_waitqueue_head(&joydev->wait);
 495
 496         joydev->minor = minor;
 497         joydev->exist = 1;
 498         joydev->handle.dev = dev;
 499         joydev->handle.name = joydev->name;
 500         joydev->handle.handler = handler;
 501         joydev->handle.private = joydev;
 502         sprintf(joydev->name, "js%d", minor);
 503
 504         for (i = 0; i < ABS_MAX + 1; i++)
 505                 if (test_bit(i, dev->absbit)) {
 506                         joydev->absmap[i] = joydev->nabs;
 507                         joydev->abspam[joydev->nabs] = i;
 508                         joydev->nabs++;
 509                 }
 510
 511         for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
 512                 if (test_bit(i + BTN_MISC, dev->keybit)) {
 513                         joydev->keymap[i] = joydev->nkey;
 514                         joydev->keypam[joydev->nkey] = i + BTN_MISC;
 515                         joydev->nkey++;
 516                 }
 517
 518         for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
 519                 if (test_bit(i + BTN_MISC, dev->keybit)) {
 520                         joydev->keymap[i] = joydev->nkey;
 521                         joydev->keypam[joydev->nkey] = i + BTN_MISC;
 522                         joydev->nkey++;
 523                 }
 524
 525         for (i = 0; i < joydev->nabs; i++) {
 526                 j = joydev->abspam[i];
 527                 if (dev->absmax[j] == dev->absmin[j]) {
 528                         joydev->corr[i].type = JS_CORR_NONE;
 529                         joydev->abs[i] = dev->abs[j];
 530                         continue;
 531                 }
 532                 joydev->corr[i].type = JS_CORR_BROKEN;
 533                 joydev->corr[i].prec = dev->absfuzz[j];
 534                 joydev->corr[i].coef[0] = (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j];
 535                 joydev->corr[i].coef[1] = (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j];
 536                 if (!(t = ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j])))
 537                         continue;
 538                 joydev->corr[i].coef[2] = (1 << 29) / t;
 539                 joydev->corr[i].coef[3] = (1 << 29) / t;
 540
 541                 joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
 542         }
 543
 544         joydev_table[minor] = joydev;
 545
 546         devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor),
 547
 548         cdev = class_device_create(&input_class, &dev->cdev, devt,
 549                                    dev->cdev.dev, joydev->name);
 550         if (IS_ERR(cdev)) {
 551                 error = PTR_ERR(cdev);
 552                 goto err_free_joydev;
 553         }
 554
 555         /* temporary symlink to keep userspace happy */
 556         error = sysfs_create_link(&input_class.subsys.kset.kobj,
 557                                   &cdev->kobj, joydev->name);
 558         if (error)
 559                 goto err_cdev_destroy;
 560
 561         error = input_register_handle(&joydev->handle);
 562         if (error)
 563                 goto err_remove_link;
 564
 565         return 0;
 566
 567  err_remove_link:
 568         sysfs_remove_link(&input_class.subsys.kset.kobj, joydev->name);
 569  err_cdev_destroy:
 570         class_device_destroy(&input_class, devt);
 571  err_free_joydev:
 572         joydev_table[minor] = NULL;
 573         kfree(joydev);
 574         return error;
 575 }
 576
 577
 578 static void joydev_disconnect(struct input_handle *handle)
 579 {
 580         struct joydev *joydev = handle->private;
 581         struct joydev_client *client;
 582
 583         input_unregister_handle(handle);
 584
 585         sysfs_remove_link(&input_class.subsys.kset.kobj, joydev->name);
 586         class_device_destroy(&input_class, MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + joydev->minor));
 587         joydev->exist = 0;
 588
 589         if (joydev->open) {
 590                 input_close_device(handle);
 591                 wake_up_interruptible(&joydev->wait);
 592                 list_for_each_entry(client, &joydev->client_list, node)
 593                         kill_fasync(&client->fasync, SIGIO, POLL_HUP);
 594         } else
 595                 joydev_free(joydev);
 596 }
 597
 598 static const struct input_device_id joydev_blacklist[] = {
 599         {
 600                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
 601                 .evbit = { BIT(EV_KEY) },
 602                 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
 603         },      /* Avoid itouchpads, touchscreens and tablets */
 604         { }     /* Terminating entry */
 605 };
 606
 607 static const struct input_device_id joydev_ids[] = {
 608         {
 609                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
 610                 .evbit = { BIT(EV_ABS) },
 611                 .absbit = { BIT(ABS_X) },
 612         },
 613         {
 614                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
 615                 .evbit = { BIT(EV_ABS) },
 616                 .absbit = { BIT(ABS_WHEEL) },
 617         },
 618         {
 619                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
 620                 .evbit = { BIT(EV_ABS) },
 621                 .absbit = { BIT(ABS_THROTTLE) },
 622         },
 623         { }     /* Terminating entry */
 624 };
 625
 626 MODULE_DEVICE_TABLE(input, joydev_ids);
 627
 628 static struct input_handler joydev_handler = {
 629         .event =        joydev_event,
 630         .connect =      joydev_connect,
 631         .disconnect =   joydev_disconnect,
 632         .fops =         &joydev_fops,
 633         .minor =        JOYDEV_MINOR_BASE,
 634         .name =         "joydev",
 635         .id_table =     joydev_ids,
 636         .blacklist =    joydev_blacklist,
 637 };
 638
 639 static int __init joydev_init(void)
 640 {
 641         return input_register_handler(&joydev_handler);
 642 }
 643
 644 static void __exit joydev_exit(void)
 645 {
 646         input_unregister_handler(&joydev_handler);
 647 }
 648
 649 module_init(joydev_init);
 650 module_exit(joydev_exit);