10e3b7bc925fd7b68ca8e7bb418d39471caa776c
[linux-2.6.git] / 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/device.h>
28
29 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
30 MODULE_DESCRIPTION("Joystick device interfaces");
31 MODULE_SUPPORTED_DEVICE("input/js");
32 MODULE_LICENSE("GPL");
33
34 #define JOYDEV_MINOR_BASE       0
35 #define JOYDEV_MINORS           16
36 #define JOYDEV_BUFFER_SIZE      64
37
38 struct joydev {
39         int exist;
40         int open;
41         int minor;
42         char name[16];
43         struct input_handle handle;
44         wait_queue_head_t wait;
45         struct list_head client_list;
46         struct js_corr corr[ABS_MAX + 1];
47         struct JS_DATA_SAVE_TYPE glue;
48         int nabs;
49         int nkey;
50         __u16 keymap[KEY_MAX - BTN_MISC + 1];
51         __u16 keypam[KEY_MAX - BTN_MISC + 1];
52         __u8 absmap[ABS_MAX + 1];
53         __u8 abspam[ABS_MAX + 1];
54         __s16 abs[ABS_MAX + 1];
55 };
56
57 struct joydev_client {
58         struct js_event buffer[JOYDEV_BUFFER_SIZE];
59         int head;
60         int tail;
61         int startup;
62         struct fasync_struct *fasync;
63         struct joydev *joydev;
64         struct list_head node;
65 };
66
67 static struct joydev *joydev_table[JOYDEV_MINORS];
68
69 static int joydev_correct(int value, struct js_corr *corr)
70 {
71         switch (corr->type) {
72                 case JS_CORR_NONE:
73                         break;
74                 case JS_CORR_BROKEN:
75                         value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 :
76                                 ((corr->coef[3] * (value - corr->coef[1])) >> 14)) :
77                                 ((corr->coef[2] * (value - corr->coef[0])) >> 14);
78                         break;
79                 default:
80                         return 0;
81         }
82
83         return value < -32767 ? -32767 : (value > 32767 ? 32767 : value);
84 }
85
86 static void joydev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
87 {
88         struct joydev *joydev = handle->private;
89         struct joydev_client *client;
90         struct js_event event;
91
92         switch (type) {
93
94                 case EV_KEY:
95                         if (code < BTN_MISC || value == 2)
96                                 return;
97                         event.type = JS_EVENT_BUTTON;
98                         event.number = joydev->keymap[code - BTN_MISC];
99                         event.value = value;
100                         break;
101
102                 case EV_ABS:
103                         event.type = JS_EVENT_AXIS;
104                         event.number = joydev->absmap[code];
105                         event.value = joydev_correct(value, joydev->corr + event.number);
106                         if (event.value == joydev->abs[event.number])
107                                 return;
108                         joydev->abs[event.number] = event.value;
109                         break;
110
111                 default:
112                         return;
113         }
114
115         event.time = jiffies_to_msecs(jiffies);
116
117         list_for_each_entry(client, &joydev->client_list, node) {
118
119                 memcpy(client->buffer + client->head, &event, sizeof(struct js_event));
120
121                 if (client->startup == joydev->nabs + joydev->nkey)
122                         if (client->tail == (client->head = (client->head + 1) & (JOYDEV_BUFFER_SIZE - 1)))
123                                 client->startup = 0;
124
125                 kill_fasync(&client->fasync, SIGIO, POLL_IN);
126         }
127
128         wake_up_interruptible(&joydev->wait);
129 }
130
131 static int joydev_fasync(int fd, struct file *file, int on)
132 {
133         int retval;
134         struct joydev_client *client = file->private_data;
135
136         retval = fasync_helper(fd, file, on, &client->fasync);
137
138         return retval < 0 ? retval : 0;
139 }
140
141 static void joydev_free(struct joydev *joydev)
142 {
143         joydev_table[joydev->minor] = NULL;
144         kfree(joydev);
145 }
146
147 static int joydev_release(struct inode *inode, struct file *file)
148 {
149         struct joydev_client *client = file->private_data;
150         struct joydev *joydev = client->joydev;
151
152         joydev_fasync(-1, file, 0);
153
154         list_del(&client->node);
155         kfree(client);
156
157         if (!--joydev->open) {
158                 if (joydev->exist)
159                         input_close_device(&joydev->handle);
160                 else
161                         joydev_free(joydev);
162         }
163
164         return 0;
165 }
166
167 static int joydev_open(struct inode *inode, struct file *file)
168 {
169         struct joydev_client *client;
170         struct joydev *joydev;
171         int i = iminor(inode) - JOYDEV_MINOR_BASE;
172         int error;
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                 error = input_open_device(&joydev->handle);
190                 if (error) {
191                         list_del(&client->node);
192                         kfree(client);
193                         return error;
194                 }
195         }
196
197         file->private_data = client;
198         return 0;
199 }
200
201 static ssize_t joydev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
202 {
203         return -EINVAL;
204 }
205
206 static ssize_t joydev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
207 {
208         struct joydev_client *client = file->private_data;
209         struct joydev *joydev = client->joydev;
210         struct input_dev *input = joydev->handle.dev;
211         int retval = 0;
212
213         if (!joydev->exist)
214                 return -ENODEV;
215
216         if (count < sizeof(struct js_event))
217                 return -EINVAL;
218
219         if (count == sizeof(struct JS_DATA_TYPE)) {
220
221                 struct JS_DATA_TYPE data;
222                 int i;
223
224                 for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
225                         data.buttons |= test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
226                 data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
227                 data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;
228
229                 if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
230                         return -EFAULT;
231
232                 client->startup = 0;
233                 client->tail = client->head;
234
235                 return sizeof(struct JS_DATA_TYPE);
236         }
237
238         if (client->startup == joydev->nabs + joydev->nkey &&
239             client->head == client->tail && (file->f_flags & O_NONBLOCK))
240                 return -EAGAIN;
241
242         retval = wait_event_interruptible(joydev->wait,
243                                           !joydev->exist ||
244                                           client->startup < joydev->nabs + joydev->nkey ||
245                                           client->head != client->tail);
246         if (retval)
247                 return retval;
248
249         if (!joydev->exist)
250                 return -ENODEV;
251
252         while (client->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) {
253
254                 struct js_event event;
255
256                 event.time = jiffies_to_msecs(jiffies);
257
258                 if (client->startup < joydev->nkey) {
259                         event.type = JS_EVENT_BUTTON | JS_EVENT_INIT;
260                         event.number = client->startup;
261                         event.value = !!test_bit(joydev->keypam[event.number], input->key);
262                 } else {
263                         event.type = JS_EVENT_AXIS | JS_EVENT_INIT;
264                         event.number = client->startup - joydev->nkey;
265                         event.value = joydev->abs[event.number];
266                 }
267
268                 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
269                         return -EFAULT;
270
271                 client->startup++;
272                 retval += sizeof(struct js_event);
273         }
274
275         while (client->head != client->tail && retval + sizeof(struct js_event) <= count) {
276
277                 if (copy_to_user(buf + retval, client->buffer + client->tail, sizeof(struct js_event)))
278                         return -EFAULT;
279
280                 client->tail = (client->tail + 1) & (JOYDEV_BUFFER_SIZE - 1);
281                 retval += sizeof(struct js_event);
282         }
283
284         return retval;
285 }
286
287 /* No kernel lock - fine */
288 static unsigned int joydev_poll(struct file *file, poll_table *wait)
289 {
290         struct joydev_client *client = file->private_data;
291         struct joydev *joydev = client->joydev;
292
293         poll_wait(file, &joydev->wait, wait);
294         return ((client->head != client->tail || client->startup < joydev->nabs + joydev->nkey) ?
295                 (POLLIN | POLLRDNORM) : 0) | (joydev->exist ? 0 : (POLLHUP | POLLERR));
296 }
297
298 static int joydev_ioctl_common(struct joydev *joydev, unsigned int cmd, void __user *argp)
299 {
300         struct input_dev *dev = joydev->handle.dev;
301         int i, j;
302
303         switch (cmd) {
304
305                 case JS_SET_CAL:
306                         return copy_from_user(&joydev->glue.JS_CORR, argp,
307                                 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
308
309                 case JS_GET_CAL:
310                         return copy_to_user(argp, &joydev->glue.JS_CORR,
311                                 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
312
313                 case JS_SET_TIMEOUT:
314                         return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
315
316                 case JS_GET_TIMEOUT:
317                         return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
318
319                 case JSIOCGVERSION:
320                         return put_user(JS_VERSION, (__u32 __user *) argp);
321
322                 case JSIOCGAXES:
323                         return put_user(joydev->nabs, (__u8 __user *) argp);
324
325                 case JSIOCGBUTTONS:
326                         return put_user(joydev->nkey, (__u8 __user *) argp);
327
328                 case JSIOCSCORR:
329                         if (copy_from_user(joydev->corr, argp,
330                                       sizeof(joydev->corr[0]) * joydev->nabs))
331                             return -EFAULT;
332                         for (i = 0; i < joydev->nabs; i++) {
333                                 j = joydev->abspam[i];
334                                 joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
335                         }
336                         return 0;
337
338                 case JSIOCGCORR:
339                         return copy_to_user(argp, joydev->corr,
340                                                 sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
341
342                 case JSIOCSAXMAP:
343                         if (copy_from_user(joydev->abspam, argp, sizeof(__u8) * (ABS_MAX + 1)))
344                                 return -EFAULT;
345                         for (i = 0; i < joydev->nabs; i++) {
346                                 if (joydev->abspam[i] > ABS_MAX)
347                                         return -EINVAL;
348                                 joydev->absmap[joydev->abspam[i]] = i;
349                         }
350                         return 0;
351
352                 case JSIOCGAXMAP:
353                         return copy_to_user(argp, joydev->abspam,
354                                                 sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0;
355
356                 case JSIOCSBTNMAP:
357                         if (copy_from_user(joydev->keypam, argp, sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)))
358                                 return -EFAULT;
359                         for (i = 0; i < joydev->nkey; i++) {
360                                 if (joydev->keypam[i] > KEY_MAX || joydev->keypam[i] < BTN_MISC)
361                                         return -EINVAL;
362                                 joydev->keymap[joydev->keypam[i] - BTN_MISC] = i;
363                         }
364                         return 0;
365
366                 case JSIOCGBTNMAP:
367                         return copy_to_user(argp, joydev->keypam,
368                                                 sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0;
369
370                 default:
371                         if ((cmd & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) == JSIOCGNAME(0)) {
372                                 int len;
373                                 if (!dev->name)
374                                         return 0;
375                                 len = strlen(dev->name) + 1;
376                                 if (len > _IOC_SIZE(cmd))
377                                         len = _IOC_SIZE(cmd);
378                                 if (copy_to_user(argp, dev->name, len))
379                                         return -EFAULT;
380                                 return len;
381                         }
382         }
383         return -EINVAL;
384 }
385
386 #ifdef CONFIG_COMPAT
387 static long joydev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
388 {
389         struct joydev_client *client = file->private_data;
390         struct joydev *joydev = client->joydev;
391         void __user *argp = (void __user *)arg;
392         s32 tmp32;
393         struct JS_DATA_SAVE_TYPE_32 ds32;
394         int err;
395
396         if (!joydev->exist)
397                 return -ENODEV;
398
399         switch(cmd) {
400         case JS_SET_TIMELIMIT:
401                 err = get_user(tmp32, (s32 __user *) arg);
402                 if (err == 0)
403                         joydev->glue.JS_TIMELIMIT = tmp32;
404                 break;
405         case JS_GET_TIMELIMIT:
406                 tmp32 = joydev->glue.JS_TIMELIMIT;
407                 err = put_user(tmp32, (s32 __user *) arg);
408                 break;
409
410         case JS_SET_ALL:
411                 err = copy_from_user(&ds32, argp,
412                                      sizeof(ds32)) ? -EFAULT : 0;
413                 if (err == 0) {
414                         joydev->glue.JS_TIMEOUT    = ds32.JS_TIMEOUT;
415                         joydev->glue.BUSY          = ds32.BUSY;
416                         joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
417                         joydev->glue.JS_TIMELIMIT  = ds32.JS_TIMELIMIT;
418                         joydev->glue.JS_SAVE       = ds32.JS_SAVE;
419                         joydev->glue.JS_CORR       = ds32.JS_CORR;
420                 }
421                 break;
422
423         case JS_GET_ALL:
424                 ds32.JS_TIMEOUT    = joydev->glue.JS_TIMEOUT;
425                 ds32.BUSY          = joydev->glue.BUSY;
426                 ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
427                 ds32.JS_TIMELIMIT  = joydev->glue.JS_TIMELIMIT;
428                 ds32.JS_SAVE       = joydev->glue.JS_SAVE;
429                 ds32.JS_CORR       = joydev->glue.JS_CORR;
430
431                 err = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
432                 break;
433
434         default:
435                 err = joydev_ioctl_common(joydev, cmd, argp);
436         }
437         return err;
438 }
439 #endif /* CONFIG_COMPAT */
440
441 static int joydev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
442 {
443         struct joydev_client *client = file->private_data;
444         struct joydev *joydev = client->joydev;
445         void __user *argp = (void __user *)arg;
446
447         if (!joydev->exist)
448                 return -ENODEV;
449
450         switch(cmd) {
451                 case JS_SET_TIMELIMIT:
452                         return get_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
453                 case JS_GET_TIMELIMIT:
454                         return put_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
455                 case JS_SET_ALL:
456                         return copy_from_user(&joydev->glue, argp,
457                                                 sizeof(joydev->glue)) ? -EFAULT : 0;
458                 case JS_GET_ALL:
459                         return copy_to_user(argp, &joydev->glue,
460                                                 sizeof(joydev->glue)) ? -EFAULT : 0;
461                 default:
462                         return joydev_ioctl_common(joydev, cmd, argp);
463         }
464 }
465
466 static const struct file_operations joydev_fops = {
467         .owner =        THIS_MODULE,
468         .read =         joydev_read,
469         .write =        joydev_write,
470         .poll =         joydev_poll,
471         .open =         joydev_open,
472         .release =      joydev_release,
473         .ioctl =        joydev_ioctl,
474 #ifdef CONFIG_COMPAT
475         .compat_ioctl = joydev_compat_ioctl,
476 #endif
477         .fasync =       joydev_fasync,
478 };
479
480 static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
481                           const struct input_device_id *id)
482 {
483         struct joydev *joydev;
484         struct class_device *cdev;
485         dev_t devt;
486         int i, j, t, minor;
487         int error;
488
489         for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++);
490         if (minor == JOYDEV_MINORS) {
491                 printk(KERN_ERR "joydev: no more free joydev devices\n");
492                 return -ENFILE;
493         }
494
495         joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
496         if (!joydev)
497                 return -ENOMEM;
498
499         INIT_LIST_HEAD(&joydev->client_list);
500         init_waitqueue_head(&joydev->wait);
501
502         joydev->minor = minor;
503         joydev->exist = 1;
504         joydev->handle.dev = dev;
505         joydev->handle.name = joydev->name;
506         joydev->handle.handler = handler;
507         joydev->handle.private = joydev;
508         sprintf(joydev->name, "js%d", minor);
509
510         for (i = 0; i < ABS_MAX + 1; i++)
511                 if (test_bit(i, dev->absbit)) {
512                         joydev->absmap[i] = joydev->nabs;
513                         joydev->abspam[joydev->nabs] = i;
514                         joydev->nabs++;
515                 }
516
517         for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
518                 if (test_bit(i + BTN_MISC, dev->keybit)) {
519                         joydev->keymap[i] = joydev->nkey;
520                         joydev->keypam[joydev->nkey] = i + BTN_MISC;
521                         joydev->nkey++;
522                 }
523
524         for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
525                 if (test_bit(i + BTN_MISC, dev->keybit)) {
526                         joydev->keymap[i] = joydev->nkey;
527                         joydev->keypam[joydev->nkey] = i + BTN_MISC;
528                         joydev->nkey++;
529                 }
530
531         for (i = 0; i < joydev->nabs; i++) {
532                 j = joydev->abspam[i];
533                 if (dev->absmax[j] == dev->absmin[j]) {
534                         joydev->corr[i].type = JS_CORR_NONE;
535                         joydev->abs[i] = dev->abs[j];
536                         continue;
537                 }
538                 joydev->corr[i].type = JS_CORR_BROKEN;
539                 joydev->corr[i].prec = dev->absfuzz[j];
540                 joydev->corr[i].coef[0] = (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j];
541                 joydev->corr[i].coef[1] = (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j];
542                 if (!(t = ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j])))
543                         continue;
544                 joydev->corr[i].coef[2] = (1 << 29) / t;
545                 joydev->corr[i].coef[3] = (1 << 29) / t;
546
547                 joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
548         }
549
550         joydev_table[minor] = joydev;
551
552         devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor),
553
554         cdev = class_device_create(&input_class, &dev->cdev, devt,
555                                    dev->cdev.dev, joydev->name);
556         if (IS_ERR(cdev)) {
557                 error = PTR_ERR(cdev);
558                 goto err_free_joydev;
559         }
560
561         /* temporary symlink to keep userspace happy */
562         error = sysfs_create_link(&input_class.subsys.kobj,
563                                   &cdev->kobj, joydev->name);
564         if (error)
565                 goto err_cdev_destroy;
566
567         error = input_register_handle(&joydev->handle);
568         if (error)
569                 goto err_remove_link;
570
571         return 0;
572
573  err_remove_link:
574         sysfs_remove_link(&input_class.subsys.kobj, joydev->name);
575  err_cdev_destroy:
576         class_device_destroy(&input_class, devt);
577  err_free_joydev:
578         joydev_table[minor] = NULL;
579         kfree(joydev);
580         return error;
581 }
582
583
584 static void joydev_disconnect(struct input_handle *handle)
585 {
586         struct joydev *joydev = handle->private;
587         struct joydev_client *client;
588
589         input_unregister_handle(handle);
590
591         sysfs_remove_link(&input_class.subsys.kobj, joydev->name);
592         class_device_destroy(&input_class, MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + joydev->minor));
593         joydev->exist = 0;
594
595         if (joydev->open) {
596                 input_close_device(handle);
597                 list_for_each_entry(client, &joydev->client_list, node)
598                         kill_fasync(&client->fasync, SIGIO, POLL_HUP);
599                 wake_up_interruptible(&joydev->wait);
600         } else
601                 joydev_free(joydev);
602 }
603
604 static const struct input_device_id joydev_blacklist[] = {
605         {
606                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
607                 .evbit = { BIT(EV_KEY) },
608                 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
609         },      /* Avoid itouchpads, touchscreens and tablets */
610         { }     /* Terminating entry */
611 };
612
613 static const struct input_device_id joydev_ids[] = {
614         {
615                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
616                 .evbit = { BIT(EV_ABS) },
617                 .absbit = { BIT(ABS_X) },
618         },
619         {
620                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
621                 .evbit = { BIT(EV_ABS) },
622                 .absbit = { BIT(ABS_WHEEL) },
623         },
624         {
625                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
626                 .evbit = { BIT(EV_ABS) },
627                 .absbit = { BIT(ABS_THROTTLE) },
628         },
629         { }     /* Terminating entry */
630 };
631
632 MODULE_DEVICE_TABLE(input, joydev_ids);
633
634 static struct input_handler joydev_handler = {
635         .event =        joydev_event,
636         .connect =      joydev_connect,
637         .disconnect =   joydev_disconnect,
638         .fops =         &joydev_fops,
639         .minor =        JOYDEV_MINOR_BASE,
640         .name =         "joydev",
641         .id_table =     joydev_ids,
642         .blacklist =    joydev_blacklist,
643 };
644
645 static int __init joydev_init(void)
646 {
647         return input_register_handler(&joydev_handler);
648 }
649
650 static void __exit joydev_exit(void)
651 {
652         input_unregister_handler(&joydev_handler);
653 }
654
655 module_init(joydev_init);
656 module_exit(joydev_exit);