2 * Joystick device driver for the input driver suite.
4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 1999 Colin Van Dyke
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.
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/sched.h>
22 #include <linux/slab.h>
24 #include <linux/miscdevice.h>
25 #include <linux/module.h>
26 #include <linux/poll.h>
27 #include <linux/init.h>
28 #include <linux/device.h>
30 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
31 MODULE_DESCRIPTION("Joystick device interfaces");
32 MODULE_SUPPORTED_DEVICE("input/js");
33 MODULE_LICENSE("GPL");
35 #define JOYDEV_MINOR_BASE 0
36 #define JOYDEV_MINORS 16
37 #define JOYDEV_BUFFER_SIZE 64
42 struct input_handle handle;
43 wait_queue_head_t wait;
44 struct list_head client_list;
45 spinlock_t client_lock; /* protects client_list */
50 struct js_corr corr[ABS_CNT];
51 struct JS_DATA_SAVE_TYPE glue;
54 __u16 keymap[KEY_MAX - BTN_MISC + 1];
55 __u16 keypam[KEY_MAX - BTN_MISC + 1];
61 struct joydev_client {
62 struct js_event buffer[JOYDEV_BUFFER_SIZE];
66 spinlock_t buffer_lock; /* protects access to buffer, head and tail */
67 struct fasync_struct *fasync;
68 struct joydev *joydev;
69 struct list_head node;
72 static struct joydev *joydev_table[JOYDEV_MINORS];
73 static DEFINE_MUTEX(joydev_table_mutex);
75 static int joydev_correct(int value, struct js_corr *corr)
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);
92 return value < -32767 ? -32767 : (value > 32767 ? 32767 : value);
95 static void joydev_pass_event(struct joydev_client *client,
96 struct js_event *event)
98 struct joydev *joydev = client->joydev;
101 * IRQs already disabled, just acquire the lock
103 spin_lock(&client->buffer_lock);
105 client->buffer[client->head] = *event;
107 if (client->startup == joydev->nabs + joydev->nkey) {
109 client->head &= JOYDEV_BUFFER_SIZE - 1;
110 if (client->tail == client->head)
114 spin_unlock(&client->buffer_lock);
116 kill_fasync(&client->fasync, SIGIO, POLL_IN);
119 static void joydev_event(struct input_handle *handle,
120 unsigned int type, unsigned int code, int value)
122 struct joydev *joydev = handle->private;
123 struct joydev_client *client;
124 struct js_event event;
129 if (code < BTN_MISC || value == 2)
131 event.type = JS_EVENT_BUTTON;
132 event.number = joydev->keymap[code - BTN_MISC];
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])
143 joydev->abs[event.number] = event.value;
150 event.time = jiffies_to_msecs(jiffies);
153 list_for_each_entry_rcu(client, &joydev->client_list, node)
154 joydev_pass_event(client, &event);
157 wake_up_interruptible(&joydev->wait);
160 static int joydev_fasync(int fd, struct file *file, int on)
162 struct joydev_client *client = file->private_data;
164 return fasync_helper(fd, file, on, &client->fasync);
167 static void joydev_free(struct device *dev)
169 struct joydev *joydev = container_of(dev, struct joydev, dev);
171 input_put_device(joydev->handle.dev);
175 static void joydev_attach_client(struct joydev *joydev,
176 struct joydev_client *client)
178 spin_lock(&joydev->client_lock);
179 list_add_tail_rcu(&client->node, &joydev->client_list);
180 spin_unlock(&joydev->client_lock);
184 static void joydev_detach_client(struct joydev *joydev,
185 struct joydev_client *client)
187 spin_lock(&joydev->client_lock);
188 list_del_rcu(&client->node);
189 spin_unlock(&joydev->client_lock);
193 static int joydev_open_device(struct joydev *joydev)
197 retval = mutex_lock_interruptible(&joydev->mutex);
203 else if (!joydev->open++) {
204 retval = input_open_device(&joydev->handle);
209 mutex_unlock(&joydev->mutex);
213 static void joydev_close_device(struct joydev *joydev)
215 mutex_lock(&joydev->mutex);
217 if (joydev->exist && !--joydev->open)
218 input_close_device(&joydev->handle);
220 mutex_unlock(&joydev->mutex);
224 * Wake up users waiting for IO so they can disconnect from
227 static void joydev_hangup(struct joydev *joydev)
229 struct joydev_client *client;
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);
236 wake_up_interruptible(&joydev->wait);
239 static int joydev_release(struct inode *inode, struct file *file)
241 struct joydev_client *client = file->private_data;
242 struct joydev *joydev = client->joydev;
244 joydev_detach_client(joydev, client);
247 joydev_close_device(joydev);
248 put_device(&joydev->dev);
253 static int joydev_open(struct inode *inode, struct file *file)
255 struct joydev_client *client;
256 struct joydev *joydev;
257 int i = iminor(inode) - JOYDEV_MINOR_BASE;
260 if (i >= JOYDEV_MINORS)
263 error = mutex_lock_interruptible(&joydev_table_mutex);
266 joydev = joydev_table[i];
268 get_device(&joydev->dev);
269 mutex_unlock(&joydev_table_mutex);
274 client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
280 spin_lock_init(&client->buffer_lock);
281 client->joydev = joydev;
282 joydev_attach_client(joydev, client);
284 error = joydev_open_device(joydev);
286 goto err_free_client;
288 file->private_data = client;
289 nonseekable_open(inode, file);
294 joydev_detach_client(joydev, client);
297 put_device(&joydev->dev);
301 static int joydev_generate_startup_event(struct joydev_client *client,
302 struct input_dev *input,
303 struct js_event *event)
305 struct joydev *joydev = client->joydev;
308 spin_lock_irq(&client->buffer_lock);
310 have_event = client->startup < joydev->nabs + joydev->nkey;
314 event->time = jiffies_to_msecs(jiffies);
315 if (client->startup < joydev->nkey) {
316 event->type = JS_EVENT_BUTTON | JS_EVENT_INIT;
317 event->number = client->startup;
318 event->value = !!test_bit(joydev->keypam[event->number],
321 event->type = JS_EVENT_AXIS | JS_EVENT_INIT;
322 event->number = client->startup - joydev->nkey;
323 event->value = joydev->abs[event->number];
328 spin_unlock_irq(&client->buffer_lock);
333 static int joydev_fetch_next_event(struct joydev_client *client,
334 struct js_event *event)
338 spin_lock_irq(&client->buffer_lock);
340 have_event = client->head != client->tail;
342 *event = client->buffer[client->tail++];
343 client->tail &= JOYDEV_BUFFER_SIZE - 1;
346 spin_unlock_irq(&client->buffer_lock);
352 * Old joystick interface
354 static ssize_t joydev_0x_read(struct joydev_client *client,
355 struct input_dev *input,
358 struct joydev *joydev = client->joydev;
359 struct JS_DATA_TYPE data;
362 spin_lock_irq(&input->event_lock);
367 for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
369 test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
370 data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
371 data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;
374 * Reset reader's event queue
376 spin_lock(&client->buffer_lock);
378 client->tail = client->head;
379 spin_unlock(&client->buffer_lock);
381 spin_unlock_irq(&input->event_lock);
383 if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
386 return sizeof(struct JS_DATA_TYPE);
389 static inline int joydev_data_pending(struct joydev_client *client)
391 struct joydev *joydev = client->joydev;
393 return client->startup < joydev->nabs + joydev->nkey ||
394 client->head != client->tail;
397 static ssize_t joydev_read(struct file *file, char __user *buf,
398 size_t count, loff_t *ppos)
400 struct joydev_client *client = file->private_data;
401 struct joydev *joydev = client->joydev;
402 struct input_dev *input = joydev->handle.dev;
403 struct js_event event;
409 if (count < sizeof(struct js_event))
412 if (count == sizeof(struct JS_DATA_TYPE))
413 return joydev_0x_read(client, input, buf);
415 if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK))
418 retval = wait_event_interruptible(joydev->wait,
419 !joydev->exist || joydev_data_pending(client));
426 while (retval + sizeof(struct js_event) <= count &&
427 joydev_generate_startup_event(client, input, &event)) {
429 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
432 retval += sizeof(struct js_event);
435 while (retval + sizeof(struct js_event) <= count &&
436 joydev_fetch_next_event(client, &event)) {
438 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
441 retval += sizeof(struct js_event);
447 /* No kernel lock - fine */
448 static unsigned int joydev_poll(struct file *file, poll_table *wait)
450 struct joydev_client *client = file->private_data;
451 struct joydev *joydev = client->joydev;
453 poll_wait(file, &joydev->wait, wait);
454 return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) |
455 (joydev->exist ? 0 : (POLLHUP | POLLERR));
458 static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev,
459 void __user *argp, size_t len)
465 len = min(len, sizeof(joydev->abspam));
467 /* Validate the map. */
468 abspam = kmalloc(len, GFP_KERNEL);
472 if (copy_from_user(abspam, argp, len)) {
477 for (i = 0; i < joydev->nabs; i++) {
478 if (abspam[i] > ABS_MAX) {
484 memcpy(joydev->abspam, abspam, len);
491 static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev,
492 void __user *argp, size_t len)
498 len = min(len, sizeof(joydev->keypam));
500 /* Validate the map. */
501 keypam = kmalloc(len, GFP_KERNEL);
505 if (copy_from_user(keypam, argp, len)) {
510 for (i = 0; i < joydev->nkey; i++) {
511 if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) {
517 memcpy(joydev->keypam, keypam, len);
519 for (i = 0; i < joydev->nkey; i++)
520 joydev->keymap[keypam[i] - BTN_MISC] = i;
528 static int joydev_ioctl_common(struct joydev *joydev,
529 unsigned int cmd, void __user *argp)
531 struct input_dev *dev = joydev->handle.dev;
536 /* Process fixed-sized commands. */
540 return copy_from_user(&joydev->glue.JS_CORR, argp,
541 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
544 return copy_to_user(argp, &joydev->glue.JS_CORR,
545 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
548 return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
551 return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
554 return put_user(JS_VERSION, (__u32 __user *) argp);
557 return put_user(joydev->nabs, (__u8 __user *) argp);
560 return put_user(joydev->nkey, (__u8 __user *) argp);
563 if (copy_from_user(joydev->corr, argp,
564 sizeof(joydev->corr[0]) * joydev->nabs))
567 for (i = 0; i < joydev->nabs; i++) {
568 int val = input_abs_get_val(dev, joydev->abspam[i]);
569 joydev->abs[i] = joydev_correct(val, &joydev->corr[i]);
574 return copy_to_user(argp, joydev->corr,
575 sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
580 * Process variable-sized commands (the axis and button map commands
581 * are considered variable-sized to decouple them from the values of
582 * ABS_MAX and KEY_MAX).
584 switch (cmd & ~IOCSIZE_MASK) {
586 case (JSIOCSAXMAP & ~IOCSIZE_MASK):
587 return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd));
589 case (JSIOCGAXMAP & ~IOCSIZE_MASK):
590 len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam));
591 return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len;
593 case (JSIOCSBTNMAP & ~IOCSIZE_MASK):
594 return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd));
596 case (JSIOCGBTNMAP & ~IOCSIZE_MASK):
597 len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam));
598 return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len;
605 len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1);
606 return copy_to_user(argp, name, len) ? -EFAULT : len;
613 static long joydev_compat_ioctl(struct file *file,
614 unsigned int cmd, unsigned long arg)
616 struct joydev_client *client = file->private_data;
617 struct joydev *joydev = client->joydev;
618 void __user *argp = (void __user *)arg;
620 struct JS_DATA_SAVE_TYPE_32 ds32;
623 retval = mutex_lock_interruptible(&joydev->mutex);
627 if (!joydev->exist) {
634 case JS_SET_TIMELIMIT:
635 retval = get_user(tmp32, (s32 __user *) arg);
637 joydev->glue.JS_TIMELIMIT = tmp32;
640 case JS_GET_TIMELIMIT:
641 tmp32 = joydev->glue.JS_TIMELIMIT;
642 retval = put_user(tmp32, (s32 __user *) arg);
646 retval = copy_from_user(&ds32, argp,
647 sizeof(ds32)) ? -EFAULT : 0;
649 joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT;
650 joydev->glue.BUSY = ds32.BUSY;
651 joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
652 joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT;
653 joydev->glue.JS_SAVE = ds32.JS_SAVE;
654 joydev->glue.JS_CORR = ds32.JS_CORR;
659 ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT;
660 ds32.BUSY = joydev->glue.BUSY;
661 ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
662 ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT;
663 ds32.JS_SAVE = joydev->glue.JS_SAVE;
664 ds32.JS_CORR = joydev->glue.JS_CORR;
666 retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
670 retval = joydev_ioctl_common(joydev, cmd, argp);
675 mutex_unlock(&joydev->mutex);
678 #endif /* CONFIG_COMPAT */
680 static long joydev_ioctl(struct file *file,
681 unsigned int cmd, unsigned long arg)
683 struct joydev_client *client = file->private_data;
684 struct joydev *joydev = client->joydev;
685 void __user *argp = (void __user *)arg;
688 retval = mutex_lock_interruptible(&joydev->mutex);
692 if (!joydev->exist) {
699 case JS_SET_TIMELIMIT:
700 retval = get_user(joydev->glue.JS_TIMELIMIT,
701 (long __user *) arg);
704 case JS_GET_TIMELIMIT:
705 retval = put_user(joydev->glue.JS_TIMELIMIT,
706 (long __user *) arg);
710 retval = copy_from_user(&joydev->glue, argp,
711 sizeof(joydev->glue)) ? -EFAULT: 0;
715 retval = copy_to_user(argp, &joydev->glue,
716 sizeof(joydev->glue)) ? -EFAULT : 0;
720 retval = joydev_ioctl_common(joydev, cmd, argp);
724 mutex_unlock(&joydev->mutex);
728 static const struct file_operations joydev_fops = {
729 .owner = THIS_MODULE,
733 .release = joydev_release,
734 .unlocked_ioctl = joydev_ioctl,
736 .compat_ioctl = joydev_compat_ioctl,
738 .fasync = joydev_fasync,
741 static int joydev_install_chrdev(struct joydev *joydev)
743 joydev_table[joydev->minor] = joydev;
747 static void joydev_remove_chrdev(struct joydev *joydev)
749 mutex_lock(&joydev_table_mutex);
750 joydev_table[joydev->minor] = NULL;
751 mutex_unlock(&joydev_table_mutex);
755 * Mark device non-existant. This disables writes, ioctls and
756 * prevents new users from opening the device. Already posted
757 * blocking reads will stay, however new ones will fail.
759 static void joydev_mark_dead(struct joydev *joydev)
761 mutex_lock(&joydev->mutex);
762 joydev->exist = false;
763 mutex_unlock(&joydev->mutex);
766 static void joydev_cleanup(struct joydev *joydev)
768 struct input_handle *handle = &joydev->handle;
770 joydev_mark_dead(joydev);
771 joydev_hangup(joydev);
772 joydev_remove_chrdev(joydev);
774 /* joydev is marked dead so noone else accesses joydev->open */
776 input_close_device(handle);
780 static bool joydev_match(struct input_handler *handler, struct input_dev *dev)
782 /* Avoid touchpads and touchscreens */
783 if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit))
786 /* Avoid tablets, digitisers and similar devices */
787 if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit))
793 static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
794 const struct input_device_id *id)
796 struct joydev *joydev;
800 for (minor = 0; minor < JOYDEV_MINORS; minor++)
801 if (!joydev_table[minor])
804 if (minor == JOYDEV_MINORS) {
805 printk(KERN_ERR "joydev: no more free joydev devices\n");
809 joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
813 INIT_LIST_HEAD(&joydev->client_list);
814 spin_lock_init(&joydev->client_lock);
815 mutex_init(&joydev->mutex);
816 init_waitqueue_head(&joydev->wait);
818 dev_set_name(&joydev->dev, "js%d", minor);
819 joydev->exist = true;
820 joydev->minor = minor;
822 joydev->handle.dev = input_get_device(dev);
823 joydev->handle.name = dev_name(&joydev->dev);
824 joydev->handle.handler = handler;
825 joydev->handle.private = joydev;
827 for (i = 0; i < ABS_CNT; i++)
828 if (test_bit(i, dev->absbit)) {
829 joydev->absmap[i] = joydev->nabs;
830 joydev->abspam[joydev->nabs] = i;
834 for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
835 if (test_bit(i + BTN_MISC, dev->keybit)) {
836 joydev->keymap[i] = joydev->nkey;
837 joydev->keypam[joydev->nkey] = i + BTN_MISC;
841 for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
842 if (test_bit(i + BTN_MISC, dev->keybit)) {
843 joydev->keymap[i] = joydev->nkey;
844 joydev->keypam[joydev->nkey] = i + BTN_MISC;
848 for (i = 0; i < joydev->nabs; i++) {
849 j = joydev->abspam[i];
850 if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) {
851 joydev->corr[i].type = JS_CORR_NONE;
852 joydev->abs[i] = input_abs_get_val(dev, j);
855 joydev->corr[i].type = JS_CORR_BROKEN;
856 joydev->corr[i].prec = input_abs_get_fuzz(dev, j);
858 t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2;
859 joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j);
860 joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j);
862 t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2
863 - 2 * input_abs_get_flat(dev, j);
865 joydev->corr[i].coef[2] = (1 << 29) / t;
866 joydev->corr[i].coef[3] = (1 << 29) / t;
869 joydev_correct(input_abs_get_val(dev, j),
874 joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor);
875 joydev->dev.class = &input_class;
876 joydev->dev.parent = &dev->dev;
877 joydev->dev.release = joydev_free;
878 device_initialize(&joydev->dev);
880 error = input_register_handle(&joydev->handle);
882 goto err_free_joydev;
884 error = joydev_install_chrdev(joydev);
886 goto err_unregister_handle;
888 error = device_add(&joydev->dev);
890 goto err_cleanup_joydev;
895 joydev_cleanup(joydev);
896 err_unregister_handle:
897 input_unregister_handle(&joydev->handle);
899 put_device(&joydev->dev);
903 static void joydev_disconnect(struct input_handle *handle)
905 struct joydev *joydev = handle->private;
907 device_del(&joydev->dev);
908 joydev_cleanup(joydev);
909 input_unregister_handle(handle);
910 put_device(&joydev->dev);
913 static const struct input_device_id joydev_ids[] = {
915 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
916 INPUT_DEVICE_ID_MATCH_ABSBIT,
917 .evbit = { BIT_MASK(EV_ABS) },
918 .absbit = { BIT_MASK(ABS_X) },
921 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
922 INPUT_DEVICE_ID_MATCH_ABSBIT,
923 .evbit = { BIT_MASK(EV_ABS) },
924 .absbit = { BIT_MASK(ABS_WHEEL) },
927 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
928 INPUT_DEVICE_ID_MATCH_ABSBIT,
929 .evbit = { BIT_MASK(EV_ABS) },
930 .absbit = { BIT_MASK(ABS_THROTTLE) },
933 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
934 INPUT_DEVICE_ID_MATCH_KEYBIT,
935 .evbit = { BIT_MASK(EV_KEY) },
936 .keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) },
939 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
940 INPUT_DEVICE_ID_MATCH_KEYBIT,
941 .evbit = { BIT_MASK(EV_KEY) },
942 .keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) },
945 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
946 INPUT_DEVICE_ID_MATCH_KEYBIT,
947 .evbit = { BIT_MASK(EV_KEY) },
948 .keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) },
950 { } /* Terminating entry */
953 MODULE_DEVICE_TABLE(input, joydev_ids);
955 static struct input_handler joydev_handler = {
956 .event = joydev_event,
957 .match = joydev_match,
958 .connect = joydev_connect,
959 .disconnect = joydev_disconnect,
960 .fops = &joydev_fops,
961 .minor = JOYDEV_MINOR_BASE,
963 .id_table = joydev_ids,
966 static int __init joydev_init(void)
968 return input_register_handler(&joydev_handler);
971 static void __exit joydev_exit(void)
973 input_unregister_handler(&joydev_handler);
976 module_init(joydev_init);
977 module_exit(joydev_exit);