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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
29MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
30MODULE_DESCRIPTION("Joystick device interfaces");
31MODULE_SUPPORTED_DEVICE("input/js");
32MODULE_LICENSE("GPL");
33
34#define JOYDEV_MINOR_BASE 0
35#define JOYDEV_MINORS 16
36#define JOYDEV_BUFFER_SIZE 64
37
38struct 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 spinlock_t client_lock;
47 struct mutex mutex;
48 struct device dev;
49
50 struct js_corr corr[ABS_MAX + 1];
51 struct JS_DATA_SAVE_TYPE glue;
52 int nabs;
53 int nkey;
54 __u16 keymap[KEY_MAX - BTN_MISC + 1];
55 __u16 keypam[KEY_MAX - BTN_MISC + 1];
56 __u8 absmap[ABS_MAX + 1];
57 __u8 abspam[ABS_MAX + 1];
58 __s16 abs[ABS_MAX + 1];
59};
60
61struct joydev_client {
62 struct js_event buffer[JOYDEV_BUFFER_SIZE];
63 int head;
64 int tail;
65 int startup;
66 spinlock_t buffer_lock;
67 struct fasync_struct *fasync;
68 struct joydev *joydev;
69 struct list_head node;
70};
71
72static struct joydev *joydev_table[JOYDEV_MINORS];
73static DEFINE_MUTEX(joydev_table_mutex);
74
75static int joydev_correct(int value, struct js_corr *corr)
76{
77 switch (corr->type) {
78
79 case JS_CORR_NONE:
80 break;
81
82 case JS_CORR_BROKEN:
83 value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 :
84 ((corr->coef[3] * (value - corr->coef[1])) >> 14)) :
85 ((corr->coef[2] * (value - corr->coef[0])) >> 14);
86 break;
87
88 default:
89 return 0;
90 }
91
92 return value < -32767 ? -32767 : (value > 32767 ? 32767 : value);
93}
94
95static void joydev_pass_event(struct joydev_client *client,
96 struct js_event *event)
97{
98 struct joydev *joydev = client->joydev;
99
100
101
102
103 spin_lock(&client->buffer_lock);
104
105 client->buffer[client->head] = *event;
106
107 if (client->startup == joydev->nabs + joydev->nkey) {
108 client->head++;
109 client->head &= JOYDEV_BUFFER_SIZE - 1;
110 if (client->tail == client->head)
111 client->startup = 0;
112 }
113
114 spin_unlock(&client->buffer_lock);
115
116 kill_fasync(&client->fasync, SIGIO, POLL_IN);
117}
118
119static void joydev_event(struct input_handle *handle,
120 unsigned int type, unsigned int code, int value)
121{
122 struct joydev *joydev = handle->private;
123 struct joydev_client *client;
124 struct js_event event;
125
126 switch (type) {
127
128 case EV_KEY:
129 if (code < BTN_MISC || value == 2)
130 return;
131 event.type = JS_EVENT_BUTTON;
132 event.number = joydev->keymap[code - BTN_MISC];
133 event.value = value;
134 break;
135
136 case EV_ABS:
137 event.type = JS_EVENT_AXIS;
138 event.number = joydev->absmap[code];
139 event.value = joydev_correct(value,
140 &joydev->corr[event.number]);
141 if (event.value == joydev->abs[event.number])
142 return;
143 joydev->abs[event.number] = event.value;
144 break;
145
146 default:
147 return;
148 }
149
150 event.time = jiffies_to_msecs(jiffies);
151
152 rcu_read_lock();
153 list_for_each_entry_rcu(client, &joydev->client_list, node)
154 joydev_pass_event(client, &event);
155 rcu_read_unlock();
156
157 wake_up_interruptible(&joydev->wait);
158}
159
160static int joydev_fasync(int fd, struct file *file, int on)
161{
162 struct joydev_client *client = file->private_data;
163
164 return fasync_helper(fd, file, on, &client->fasync);
165}
166
167static void joydev_free(struct device *dev)
168{
169 struct joydev *joydev = container_of(dev, struct joydev, dev);
170
171 input_put_device(joydev->handle.dev);
172 kfree(joydev);
173}
174
175static void joydev_attach_client(struct joydev *joydev,
176 struct joydev_client *client)
177{
178 spin_lock(&joydev->client_lock);
179 list_add_tail_rcu(&client->node, &joydev->client_list);
180 spin_unlock(&joydev->client_lock);
181 synchronize_rcu();
182}
183
184static void joydev_detach_client(struct joydev *joydev,
185 struct joydev_client *client)
186{
187 spin_lock(&joydev->client_lock);
188 list_del_rcu(&client->node);
189 spin_unlock(&joydev->client_lock);
190 synchronize_rcu();
191}
192
193static int joydev_open_device(struct joydev *joydev)
194{
195 int retval;
196
197 retval = mutex_lock_interruptible(&joydev->mutex);
198 if (retval)
199 return retval;
200
201 if (!joydev->exist)
202 retval = -ENODEV;
203 else if (!joydev->open++) {
204 retval = input_open_device(&joydev->handle);
205 if (retval)
206 joydev->open--;
207 }
208
209 mutex_unlock(&joydev->mutex);
210 return retval;
211}
212
213static void joydev_close_device(struct joydev *joydev)
214{
215 mutex_lock(&joydev->mutex);
216
217 if (joydev->exist && !--joydev->open)
218 input_close_device(&joydev->handle);
219
220 mutex_unlock(&joydev->mutex);
221}
222
223
224
225
226
227static void joydev_hangup(struct joydev *joydev)
228{
229 struct joydev_client *client;
230
231 spin_lock(&joydev->client_lock);
232 list_for_each_entry(client, &joydev->client_list, node)
233 kill_fasync(&client->fasync, SIGIO, POLL_HUP);
234 spin_unlock(&joydev->client_lock);
235
236 wake_up_interruptible(&joydev->wait);
237}
238
239static int joydev_release(struct inode *inode, struct file *file)
240{
241 struct joydev_client *client = file->private_data;
242 struct joydev *joydev = client->joydev;
243
244 joydev_detach_client(joydev, client);
245 kfree(client);
246
247 joydev_close_device(joydev);
248 put_device(&joydev->dev);
249
250 return 0;
251}
252
253static int joydev_open(struct inode *inode, struct file *file)
254{
255 struct joydev_client *client;
256 struct joydev *joydev;
257 int i = iminor(inode) - JOYDEV_MINOR_BASE;
258 int error;
259
260 if (i >= JOYDEV_MINORS)
261 return -ENODEV;
262
263 error = mutex_lock_interruptible(&joydev_table_mutex);
264 if (error)
265 return error;
266 joydev = joydev_table[i];
267 if (joydev)
268 get_device(&joydev->dev);
269 mutex_unlock(&joydev_table_mutex);
270
271 if (!joydev)
272 return -ENODEV;
273
274 client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
275 if (!client) {
276 error = -ENOMEM;
277 goto err_put_joydev;
278 }
279
280 spin_lock_init(&client->buffer_lock);
281 client->joydev = joydev;
282 joydev_attach_client(joydev, client);
283
284 error = joydev_open_device(joydev);
285 if (error)
286 goto err_free_client;
287
288 file->private_data = client;
289 return 0;
290
291 err_free_client:
292 joydev_detach_client(joydev, client);
293 kfree(client);
294 err_put_joydev:
295 put_device(&joydev->dev);
296 return error;
297}
298
299static int joydev_generate_startup_event(struct joydev_client *client,
300 struct input_dev *input,
301 struct js_event *event)
302{
303 struct joydev *joydev = client->joydev;
304 int have_event;
305
306 spin_lock_irq(&client->buffer_lock);
307
308 have_event = client->startup < joydev->nabs + joydev->nkey;
309
310 if (have_event) {
311
312 event->time = jiffies_to_msecs(jiffies);
313 if (client->startup < joydev->nkey) {
314 event->type = JS_EVENT_BUTTON | JS_EVENT_INIT;
315 event->number = client->startup;
316 event->value = !!test_bit(joydev->keypam[event->number],
317 input->key);
318 } else {
319 event->type = JS_EVENT_AXIS | JS_EVENT_INIT;
320 event->number = client->startup - joydev->nkey;
321 event->value = joydev->abs[event->number];
322 }
323 client->startup++;
324 }
325
326 spin_unlock_irq(&client->buffer_lock);
327
328 return have_event;
329}
330
331static int joydev_fetch_next_event(struct joydev_client *client,
332 struct js_event *event)
333{
334 int have_event;
335
336 spin_lock_irq(&client->buffer_lock);
337
338 have_event = client->head != client->tail;
339 if (have_event) {
340 *event = client->buffer[client->tail++];
341 client->tail &= JOYDEV_BUFFER_SIZE - 1;
342 }
343
344 spin_unlock_irq(&client->buffer_lock);
345
346 return have_event;
347}
348
349
350
351
352static ssize_t joydev_0x_read(struct joydev_client *client,
353 struct input_dev *input,
354 char __user *buf)
355{
356 struct joydev *joydev = client->joydev;
357 struct JS_DATA_TYPE data;
358 int i;
359
360 spin_lock_irq(&input->event_lock);
361
362
363
364
365 for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
366 data.buttons |=
367 test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
368 data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
369 data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;
370
371
372
373
374 spin_lock(&client->buffer_lock);
375 client->startup = 0;
376 client->tail = client->head;
377 spin_unlock(&client->buffer_lock);
378
379 spin_unlock_irq(&input->event_lock);
380
381 if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
382 return -EFAULT;
383
384 return sizeof(struct JS_DATA_TYPE);
385}
386
387static inline int joydev_data_pending(struct joydev_client *client)
388{
389 struct joydev *joydev = client->joydev;
390
391 return client->startup < joydev->nabs + joydev->nkey ||
392 client->head != client->tail;
393}
394
395static ssize_t joydev_read(struct file *file, char __user *buf,
396 size_t count, loff_t *ppos)
397{
398 struct joydev_client *client = file->private_data;
399 struct joydev *joydev = client->joydev;
400 struct input_dev *input = joydev->handle.dev;
401 struct js_event event;
402 int retval;
403
404 if (!joydev->exist)
405 return -ENODEV;
406
407 if (count < sizeof(struct js_event))
408 return -EINVAL;
409
410 if (count == sizeof(struct JS_DATA_TYPE))
411 return joydev_0x_read(client, input, buf);
412
413 if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK))
414 return -EAGAIN;
415
416 retval = wait_event_interruptible(joydev->wait,
417 !joydev->exist || joydev_data_pending(client));
418 if (retval)
419 return retval;
420
421 if (!joydev->exist)
422 return -ENODEV;
423
424 while (retval + sizeof(struct js_event) <= count &&
425 joydev_generate_startup_event(client, input, &event)) {
426
427 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
428 return -EFAULT;
429
430 retval += sizeof(struct js_event);
431 }
432
433 while (retval + sizeof(struct js_event) <= count &&
434 joydev_fetch_next_event(client, &event)) {
435
436 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
437 return -EFAULT;
438
439 retval += sizeof(struct js_event);
440 }
441
442 return retval;
443}
444
445
446static unsigned int joydev_poll(struct file *file, poll_table *wait)
447{
448 struct joydev_client *client = file->private_data;
449 struct joydev *joydev = client->joydev;
450
451 poll_wait(file, &joydev->wait, wait);
452 return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) |
453 (joydev->exist ? 0 : (POLLHUP | POLLERR));
454}
455
456static int joydev_ioctl_common(struct joydev *joydev,
457 unsigned int cmd, void __user *argp)
458{
459 struct input_dev *dev = joydev->handle.dev;
460 int i, j;
461
462 switch (cmd) {
463
464 case JS_SET_CAL:
465 return copy_from_user(&joydev->glue.JS_CORR, argp,
466 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
467
468 case JS_GET_CAL:
469 return copy_to_user(argp, &joydev->glue.JS_CORR,
470 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
471
472 case JS_SET_TIMEOUT:
473 return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
474
475 case JS_GET_TIMEOUT:
476 return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
477
478 case JSIOCGVERSION:
479 return put_user(JS_VERSION, (__u32 __user *) argp);
480
481 case JSIOCGAXES:
482 return put_user(joydev->nabs, (__u8 __user *) argp);
483
484 case JSIOCGBUTTONS:
485 return put_user(joydev->nkey, (__u8 __user *) argp);
486
487 case JSIOCSCORR:
488 if (copy_from_user(joydev->corr, argp,
489 sizeof(joydev->corr[0]) * joydev->nabs))
490 return -EFAULT;
491
492 for (i = 0; i < joydev->nabs; i++) {
493 j = joydev->abspam[i];
494 joydev->abs[i] = joydev_correct(dev->abs[j],
495 &joydev->corr[i]);
496 }
497 return 0;
498
499 case JSIOCGCORR:
500 return copy_to_user(argp, joydev->corr,
501 sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
502
503 case JSIOCSAXMAP:
504 if (copy_from_user(joydev->abspam, argp,
505 sizeof(__u8) * (ABS_MAX + 1)))
506 return -EFAULT;
507
508 for (i = 0; i < joydev->nabs; i++) {
509 if (joydev->abspam[i] > ABS_MAX)
510 return -EINVAL;
511 joydev->absmap[joydev->abspam[i]] = i;
512 }
513 return 0;
514
515 case JSIOCGAXMAP:
516 return copy_to_user(argp, joydev->abspam,
517 sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0;
518
519 case JSIOCSBTNMAP:
520 if (copy_from_user(joydev->keypam, argp,
521 sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)))
522 return -EFAULT;
523
524 for (i = 0; i < joydev->nkey; i++) {
525 if (joydev->keypam[i] > KEY_MAX ||
526 joydev->keypam[i] < BTN_MISC)
527 return -EINVAL;
528 joydev->keymap[joydev->keypam[i] - BTN_MISC] = i;
529 }
530
531 return 0;
532
533 case JSIOCGBTNMAP:
534 return copy_to_user(argp, joydev->keypam,
535 sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0;
536
537 default:
538 if ((cmd & ~IOCSIZE_MASK) == JSIOCGNAME(0)) {
539 int len;
540 if (!dev->name)
541 return 0;
542 len = strlen(dev->name) + 1;
543 if (len > _IOC_SIZE(cmd))
544 len = _IOC_SIZE(cmd);
545 if (copy_to_user(argp, dev->name, len))
546 return -EFAULT;
547 return len;
548 }
549 }
550 return -EINVAL;
551}
552
553#ifdef CONFIG_COMPAT
554static long joydev_compat_ioctl(struct file *file,
555 unsigned int cmd, unsigned long arg)
556{
557 struct joydev_client *client = file->private_data;
558 struct joydev *joydev = client->joydev;
559 void __user *argp = (void __user *)arg;
560 s32 tmp32;
561 struct JS_DATA_SAVE_TYPE_32 ds32;
562 int retval;
563
564 retval = mutex_lock_interruptible(&joydev->mutex);
565 if (retval)
566 return retval;
567
568 if (!joydev->exist) {
569 retval = -ENODEV;
570 goto out;
571 }
572
573 switch (cmd) {
574
575 case JS_SET_TIMELIMIT:
576 retval = get_user(tmp32, (s32 __user *) arg);
577 if (retval == 0)
578 joydev->glue.JS_TIMELIMIT = tmp32;
579 break;
580
581 case JS_GET_TIMELIMIT:
582 tmp32 = joydev->glue.JS_TIMELIMIT;
583 retval = put_user(tmp32, (s32 __user *) arg);
584 break;
585
586 case JS_SET_ALL:
587 retval = copy_from_user(&ds32, argp,
588 sizeof(ds32)) ? -EFAULT : 0;
589 if (retval == 0) {
590 joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT;
591 joydev->glue.BUSY = ds32.BUSY;
592 joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
593 joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT;
594 joydev->glue.JS_SAVE = ds32.JS_SAVE;
595 joydev->glue.JS_CORR = ds32.JS_CORR;
596 }
597 break;
598
599 case JS_GET_ALL:
600 ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT;
601 ds32.BUSY = joydev->glue.BUSY;
602 ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
603 ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT;
604 ds32.JS_SAVE = joydev->glue.JS_SAVE;
605 ds32.JS_CORR = joydev->glue.JS_CORR;
606
607 retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
608 break;
609
610 default:
611 retval = joydev_ioctl_common(joydev, cmd, argp);
612 break;
613 }
614
615 out:
616 mutex_unlock(&joydev->mutex);
617 return retval;
618}
619#endif
620
621static long joydev_ioctl(struct file *file,
622 unsigned int cmd, unsigned long arg)
623{
624 struct joydev_client *client = file->private_data;
625 struct joydev *joydev = client->joydev;
626 void __user *argp = (void __user *)arg;
627 int retval;
628
629 retval = mutex_lock_interruptible(&joydev->mutex);
630 if (retval)
631 return retval;
632
633 if (!joydev->exist) {
634 retval = -ENODEV;
635 goto out;
636 }
637
638 switch (cmd) {
639
640 case JS_SET_TIMELIMIT:
641 retval = get_user(joydev->glue.JS_TIMELIMIT,
642 (long __user *) arg);
643 break;
644
645 case JS_GET_TIMELIMIT:
646 retval = put_user(joydev->glue.JS_TIMELIMIT,
647 (long __user *) arg);
648 break;
649
650 case JS_SET_ALL:
651 retval = copy_from_user(&joydev->glue, argp,
652 sizeof(joydev->glue)) ? -EFAULT: 0;
653 break;
654
655 case JS_GET_ALL:
656 retval = copy_to_user(argp, &joydev->glue,
657 sizeof(joydev->glue)) ? -EFAULT : 0;
658 break;
659
660 default:
661 retval = joydev_ioctl_common(joydev, cmd, argp);
662 break;
663 }
664 out:
665 mutex_unlock(&joydev->mutex);
666 return retval;
667}
668
669static const struct file_operations joydev_fops = {
670 .owner = THIS_MODULE,
671 .read = joydev_read,
672 .poll = joydev_poll,
673 .open = joydev_open,
674 .release = joydev_release,
675 .unlocked_ioctl = joydev_ioctl,
676#ifdef CONFIG_COMPAT
677 .compat_ioctl = joydev_compat_ioctl,
678#endif
679 .fasync = joydev_fasync,
680};
681
682static int joydev_install_chrdev(struct joydev *joydev)
683{
684 joydev_table[joydev->minor] = joydev;
685 return 0;
686}
687
688static void joydev_remove_chrdev(struct joydev *joydev)
689{
690 mutex_lock(&joydev_table_mutex);
691 joydev_table[joydev->minor] = NULL;
692 mutex_unlock(&joydev_table_mutex);
693}
694
695
696
697
698
699
700static void joydev_mark_dead(struct joydev *joydev)
701{
702 mutex_lock(&joydev->mutex);
703 joydev->exist = 0;
704 mutex_unlock(&joydev->mutex);
705}
706
707static void joydev_cleanup(struct joydev *joydev)
708{
709 struct input_handle *handle = &joydev->handle;
710
711 joydev_mark_dead(joydev);
712 joydev_hangup(joydev);
713 joydev_remove_chrdev(joydev);
714
715
716 if (joydev->open)
717 input_close_device(handle);
718}
719
720static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
721 const struct input_device_id *id)
722{
723 struct joydev *joydev;
724 int i, j, t, minor;
725 int error;
726
727 for (minor = 0; minor < JOYDEV_MINORS; minor++)
728 if (!joydev_table[minor])
729 break;
730
731 if (minor == JOYDEV_MINORS) {
732 printk(KERN_ERR "joydev: no more free joydev devices\n");
733 return -ENFILE;
734 }
735
736 joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
737 if (!joydev)
738 return -ENOMEM;
739
740 INIT_LIST_HEAD(&joydev->client_list);
741 spin_lock_init(&joydev->client_lock);
742 mutex_init(&joydev->mutex);
743 init_waitqueue_head(&joydev->wait);
744
745 snprintf(joydev->name, sizeof(joydev->name), "js%d", minor);
746 joydev->exist = 1;
747 joydev->minor = minor;
748
749 joydev->exist = 1;
750 joydev->handle.dev = input_get_device(dev);
751 joydev->handle.name = joydev->name;
752 joydev->handle.handler = handler;
753 joydev->handle.private = joydev;
754
755 for (i = 0; i < ABS_MAX + 1; i++)
756 if (test_bit(i, dev->absbit)) {
757 joydev->absmap[i] = joydev->nabs;
758 joydev->abspam[joydev->nabs] = i;
759 joydev->nabs++;
760 }
761
762 for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
763 if (test_bit(i + BTN_MISC, dev->keybit)) {
764 joydev->keymap[i] = joydev->nkey;
765 joydev->keypam[joydev->nkey] = i + BTN_MISC;
766 joydev->nkey++;
767 }
768
769 for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
770 if (test_bit(i + BTN_MISC, dev->keybit)) {
771 joydev->keymap[i] = joydev->nkey;
772 joydev->keypam[joydev->nkey] = i + BTN_MISC;
773 joydev->nkey++;
774 }
775
776 for (i = 0; i < joydev->nabs; i++) {
777 j = joydev->abspam[i];
778 if (dev->absmax[j] == dev->absmin[j]) {
779 joydev->corr[i].type = JS_CORR_NONE;
780 joydev->abs[i] = dev->abs[j];
781 continue;
782 }
783 joydev->corr[i].type = JS_CORR_BROKEN;
784 joydev->corr[i].prec = dev->absfuzz[j];
785 joydev->corr[i].coef[0] =
786 (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j];
787 joydev->corr[i].coef[1] =
788 (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j];
789
790 t = (dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j];
791 if (t) {
792 joydev->corr[i].coef[2] = (1 << 29) / t;
793 joydev->corr[i].coef[3] = (1 << 29) / t;
794
795 joydev->abs[i] = joydev_correct(dev->abs[j],
796 joydev->corr + i);
797 }
798 }
799
800 dev_set_name(&joydev->dev, joydev->name);
801 joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor);
802 joydev->dev.class = &input_class;
803 joydev->dev.parent = &dev->dev;
804 joydev->dev.release = joydev_free;
805 device_initialize(&joydev->dev);
806
807 error = input_register_handle(&joydev->handle);
808 if (error)
809 goto err_free_joydev;
810
811 error = joydev_install_chrdev(joydev);
812 if (error)
813 goto err_unregister_handle;
814
815 error = device_add(&joydev->dev);
816 if (error)
817 goto err_cleanup_joydev;
818
819 return 0;
820
821 err_cleanup_joydev:
822 joydev_cleanup(joydev);
823 err_unregister_handle:
824 input_unregister_handle(&joydev->handle);
825 err_free_joydev:
826 put_device(&joydev->dev);
827 return error;
828}
829
830static void joydev_disconnect(struct input_handle *handle)
831{
832 struct joydev *joydev = handle->private;
833
834 device_del(&joydev->dev);
835 joydev_cleanup(joydev);
836 input_unregister_handle(handle);
837 put_device(&joydev->dev);
838}
839
840static const struct input_device_id joydev_blacklist[] = {
841 {
842 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
843 INPUT_DEVICE_ID_MATCH_KEYBIT,
844 .evbit = { BIT_MASK(EV_KEY) },
845 .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
846 },
847 {
848 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
849 INPUT_DEVICE_ID_MATCH_KEYBIT,
850 .evbit = { BIT_MASK(EV_KEY) },
851 .keybit = { [BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_DIGI) },
852 },
853 { }
854};
855
856static const struct input_device_id joydev_ids[] = {
857 {
858 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
859 INPUT_DEVICE_ID_MATCH_ABSBIT,
860 .evbit = { BIT_MASK(EV_ABS) },
861 .absbit = { BIT_MASK(ABS_X) },
862 },
863 {
864 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
865 INPUT_DEVICE_ID_MATCH_ABSBIT,
866 .evbit = { BIT_MASK(EV_ABS) },
867 .absbit = { BIT_MASK(ABS_WHEEL) },
868 },
869 {
870 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
871 INPUT_DEVICE_ID_MATCH_ABSBIT,
872 .evbit = { BIT_MASK(EV_ABS) },
873 .absbit = { BIT_MASK(ABS_THROTTLE) },
874 },
875 { }
876};
877
878MODULE_DEVICE_TABLE(input, joydev_ids);
879
880static struct input_handler joydev_handler = {
881 .event = joydev_event,
882 .connect = joydev_connect,
883 .disconnect = joydev_disconnect,
884 .fops = &joydev_fops,
885 .minor = JOYDEV_MINOR_BASE,
886 .name = "joydev",
887 .id_table = joydev_ids,
888 .blacklist = joydev_blacklist,
889};
890
891static int __init joydev_init(void)
892{
893 return input_register_handler(&joydev_handler);
894}
895
896static void __exit joydev_exit(void)
897{
898 input_unregister_handler(&joydev_handler);
899}
900
901module_init(joydev_init);
902module_exit(joydev_exit);
903
