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.
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16 #include <linux/delay.h>
17 #include <linux/errno.h>
18 #include <linux/joystick.h>
19 #include <linux/input.h>
20 #include <linux/kernel.h>
21 #include <linux/major.h>
22 #include <linux/sched.h>
23 #include <linux/slab.h>
25 #include <linux/miscdevice.h>
26 #include <linux/module.h>
27 #include <linux/poll.h>
28 #include <linux/init.h>
29 #include <linux/device.h>
30 #include <linux/cdev.h>
32 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
33 MODULE_DESCRIPTION("Joystick device interfaces");
34 MODULE_SUPPORTED_DEVICE("input/js");
35 MODULE_LICENSE("GPL");
37 #define JOYDEV_MINOR_BASE 0
38 #define JOYDEV_MINORS 16
39 #define JOYDEV_BUFFER_SIZE 64
43 struct input_handle handle;
44 wait_queue_head_t wait;
45 struct list_head client_list;
46 spinlock_t client_lock; /* protects client_list */
52 struct js_corr corr[ABS_CNT];
53 struct JS_DATA_SAVE_TYPE glue;
56 __u16 keymap[KEY_MAX - BTN_MISC + 1];
57 __u16 keypam[KEY_MAX - BTN_MISC + 1];
63 struct joydev_client {
64 struct js_event buffer[JOYDEV_BUFFER_SIZE];
68 spinlock_t buffer_lock; /* protects access to buffer, head and tail */
69 struct fasync_struct *fasync;
70 struct joydev *joydev;
71 struct list_head node;
74 static int joydev_correct(int value, struct js_corr *corr)
82 value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 :
83 ((corr->coef[3] * (value - corr->coef[1])) >> 14)) :
84 ((corr->coef[2] * (value - corr->coef[0])) >> 14);
91 return value < -32767 ? -32767 : (value > 32767 ? 32767 : value);
94 static void joydev_pass_event(struct joydev_client *client,
95 struct js_event *event)
97 struct joydev *joydev = client->joydev;
100 * IRQs already disabled, just acquire the lock
102 spin_lock(&client->buffer_lock);
104 client->buffer[client->head] = *event;
106 if (client->startup == joydev->nabs + joydev->nkey) {
108 client->head &= JOYDEV_BUFFER_SIZE - 1;
109 if (client->tail == client->head)
113 spin_unlock(&client->buffer_lock);
115 kill_fasync(&client->fasync, SIGIO, POLL_IN);
118 static void joydev_event(struct input_handle *handle,
119 unsigned int type, unsigned int code, int value)
121 struct joydev *joydev = handle->private;
122 struct joydev_client *client;
123 struct js_event event;
128 if (code < BTN_MISC || value == 2)
130 event.type = JS_EVENT_BUTTON;
131 event.number = joydev->keymap[code - BTN_MISC];
136 event.type = JS_EVENT_AXIS;
137 event.number = joydev->absmap[code];
138 event.value = joydev_correct(value,
139 &joydev->corr[event.number]);
140 if (event.value == joydev->abs[event.number])
142 joydev->abs[event.number] = event.value;
149 event.time = jiffies_to_msecs(jiffies);
152 list_for_each_entry_rcu(client, &joydev->client_list, node)
153 joydev_pass_event(client, &event);
156 wake_up_interruptible(&joydev->wait);
159 static int joydev_fasync(int fd, struct file *file, int on)
161 struct joydev_client *client = file->private_data;
163 return fasync_helper(fd, file, on, &client->fasync);
166 static void joydev_free(struct device *dev)
168 struct joydev *joydev = container_of(dev, struct joydev, dev);
170 input_put_device(joydev->handle.dev);
174 static void joydev_attach_client(struct joydev *joydev,
175 struct joydev_client *client)
177 spin_lock(&joydev->client_lock);
178 list_add_tail_rcu(&client->node, &joydev->client_list);
179 spin_unlock(&joydev->client_lock);
182 static void joydev_detach_client(struct joydev *joydev,
183 struct joydev_client *client)
185 spin_lock(&joydev->client_lock);
186 list_del_rcu(&client->node);
187 spin_unlock(&joydev->client_lock);
191 static int joydev_open_device(struct joydev *joydev)
195 retval = mutex_lock_interruptible(&joydev->mutex);
201 else if (!joydev->open++) {
202 retval = input_open_device(&joydev->handle);
207 mutex_unlock(&joydev->mutex);
211 static void joydev_close_device(struct joydev *joydev)
213 mutex_lock(&joydev->mutex);
215 if (joydev->exist && !--joydev->open)
216 input_close_device(&joydev->handle);
218 mutex_unlock(&joydev->mutex);
222 * Wake up users waiting for IO so they can disconnect from
225 static void joydev_hangup(struct joydev *joydev)
227 struct joydev_client *client;
229 spin_lock(&joydev->client_lock);
230 list_for_each_entry(client, &joydev->client_list, node)
231 kill_fasync(&client->fasync, SIGIO, POLL_HUP);
232 spin_unlock(&joydev->client_lock);
234 wake_up_interruptible(&joydev->wait);
237 static int joydev_release(struct inode *inode, struct file *file)
239 struct joydev_client *client = file->private_data;
240 struct joydev *joydev = client->joydev;
242 joydev_detach_client(joydev, client);
245 joydev_close_device(joydev);
246 put_device(&joydev->dev);
251 static int joydev_open(struct inode *inode, struct file *file)
253 struct joydev *joydev =
254 container_of(inode->i_cdev, struct joydev, cdev);
255 struct joydev_client *client;
258 client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
262 spin_lock_init(&client->buffer_lock);
263 client->joydev = joydev;
264 joydev_attach_client(joydev, client);
266 error = joydev_open_device(joydev);
268 goto err_free_client;
270 file->private_data = client;
271 nonseekable_open(inode, file);
273 get_device(&joydev->dev);
277 joydev_detach_client(joydev, client);
282 static int joydev_generate_startup_event(struct joydev_client *client,
283 struct input_dev *input,
284 struct js_event *event)
286 struct joydev *joydev = client->joydev;
289 spin_lock_irq(&client->buffer_lock);
291 have_event = client->startup < joydev->nabs + joydev->nkey;
295 event->time = jiffies_to_msecs(jiffies);
296 if (client->startup < joydev->nkey) {
297 event->type = JS_EVENT_BUTTON | JS_EVENT_INIT;
298 event->number = client->startup;
299 event->value = !!test_bit(joydev->keypam[event->number],
302 event->type = JS_EVENT_AXIS | JS_EVENT_INIT;
303 event->number = client->startup - joydev->nkey;
304 event->value = joydev->abs[event->number];
309 spin_unlock_irq(&client->buffer_lock);
314 static int joydev_fetch_next_event(struct joydev_client *client,
315 struct js_event *event)
319 spin_lock_irq(&client->buffer_lock);
321 have_event = client->head != client->tail;
323 *event = client->buffer[client->tail++];
324 client->tail &= JOYDEV_BUFFER_SIZE - 1;
327 spin_unlock_irq(&client->buffer_lock);
333 * Old joystick interface
335 static ssize_t joydev_0x_read(struct joydev_client *client,
336 struct input_dev *input,
339 struct joydev *joydev = client->joydev;
340 struct JS_DATA_TYPE data;
343 spin_lock_irq(&input->event_lock);
348 for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
350 test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
351 data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
352 data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;
355 * Reset reader's event queue
357 spin_lock(&client->buffer_lock);
359 client->tail = client->head;
360 spin_unlock(&client->buffer_lock);
362 spin_unlock_irq(&input->event_lock);
364 if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
367 return sizeof(struct JS_DATA_TYPE);
370 static inline int joydev_data_pending(struct joydev_client *client)
372 struct joydev *joydev = client->joydev;
374 return client->startup < joydev->nabs + joydev->nkey ||
375 client->head != client->tail;
378 static ssize_t joydev_read(struct file *file, char __user *buf,
379 size_t count, loff_t *ppos)
381 struct joydev_client *client = file->private_data;
382 struct joydev *joydev = client->joydev;
383 struct input_dev *input = joydev->handle.dev;
384 struct js_event event;
390 if (count < sizeof(struct js_event))
393 if (count == sizeof(struct JS_DATA_TYPE))
394 return joydev_0x_read(client, input, buf);
396 if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK))
399 retval = wait_event_interruptible(joydev->wait,
400 !joydev->exist || joydev_data_pending(client));
407 while (retval + sizeof(struct js_event) <= count &&
408 joydev_generate_startup_event(client, input, &event)) {
410 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
413 retval += sizeof(struct js_event);
416 while (retval + sizeof(struct js_event) <= count &&
417 joydev_fetch_next_event(client, &event)) {
419 if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
422 retval += sizeof(struct js_event);
428 /* No kernel lock - fine */
429 static unsigned int joydev_poll(struct file *file, poll_table *wait)
431 struct joydev_client *client = file->private_data;
432 struct joydev *joydev = client->joydev;
434 poll_wait(file, &joydev->wait, wait);
435 return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) |
436 (joydev->exist ? 0 : (POLLHUP | POLLERR));
439 static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev,
440 void __user *argp, size_t len)
446 len = min(len, sizeof(joydev->abspam));
448 /* Validate the map. */
449 abspam = kmalloc(len, GFP_KERNEL);
453 if (copy_from_user(abspam, argp, len)) {
458 for (i = 0; i < joydev->nabs; i++) {
459 if (abspam[i] > ABS_MAX) {
465 memcpy(joydev->abspam, abspam, len);
467 for (i = 0; i < joydev->nabs; i++)
468 joydev->absmap[joydev->abspam[i]] = i;
475 static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev,
476 void __user *argp, size_t len)
482 len = min(len, sizeof(joydev->keypam));
484 /* Validate the map. */
485 keypam = kmalloc(len, GFP_KERNEL);
489 if (copy_from_user(keypam, argp, len)) {
494 for (i = 0; i < joydev->nkey; i++) {
495 if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) {
501 memcpy(joydev->keypam, keypam, len);
503 for (i = 0; i < joydev->nkey; i++)
504 joydev->keymap[keypam[i] - BTN_MISC] = i;
512 static int joydev_ioctl_common(struct joydev *joydev,
513 unsigned int cmd, void __user *argp)
515 struct input_dev *dev = joydev->handle.dev;
520 /* Process fixed-sized commands. */
524 return copy_from_user(&joydev->glue.JS_CORR, argp,
525 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
528 return copy_to_user(argp, &joydev->glue.JS_CORR,
529 sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
532 return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
535 return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
538 return put_user(JS_VERSION, (__u32 __user *) argp);
541 return put_user(joydev->nabs, (__u8 __user *) argp);
544 return put_user(joydev->nkey, (__u8 __user *) argp);
547 if (copy_from_user(joydev->corr, argp,
548 sizeof(joydev->corr[0]) * joydev->nabs))
551 for (i = 0; i < joydev->nabs; i++) {
552 int val = input_abs_get_val(dev, joydev->abspam[i]);
553 joydev->abs[i] = joydev_correct(val, &joydev->corr[i]);
558 return copy_to_user(argp, joydev->corr,
559 sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
564 * Process variable-sized commands (the axis and button map commands
565 * are considered variable-sized to decouple them from the values of
566 * ABS_MAX and KEY_MAX).
568 switch (cmd & ~IOCSIZE_MASK) {
570 case (JSIOCSAXMAP & ~IOCSIZE_MASK):
571 return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd));
573 case (JSIOCGAXMAP & ~IOCSIZE_MASK):
574 len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam));
575 return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len;
577 case (JSIOCSBTNMAP & ~IOCSIZE_MASK):
578 return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd));
580 case (JSIOCGBTNMAP & ~IOCSIZE_MASK):
581 len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam));
582 return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len;
589 len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1);
590 return copy_to_user(argp, name, len) ? -EFAULT : len;
597 static long joydev_compat_ioctl(struct file *file,
598 unsigned int cmd, unsigned long arg)
600 struct joydev_client *client = file->private_data;
601 struct joydev *joydev = client->joydev;
602 void __user *argp = (void __user *)arg;
604 struct JS_DATA_SAVE_TYPE_32 ds32;
607 retval = mutex_lock_interruptible(&joydev->mutex);
611 if (!joydev->exist) {
618 case JS_SET_TIMELIMIT:
619 retval = get_user(tmp32, (s32 __user *) arg);
621 joydev->glue.JS_TIMELIMIT = tmp32;
624 case JS_GET_TIMELIMIT:
625 tmp32 = joydev->glue.JS_TIMELIMIT;
626 retval = put_user(tmp32, (s32 __user *) arg);
630 retval = copy_from_user(&ds32, argp,
631 sizeof(ds32)) ? -EFAULT : 0;
633 joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT;
634 joydev->glue.BUSY = ds32.BUSY;
635 joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
636 joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT;
637 joydev->glue.JS_SAVE = ds32.JS_SAVE;
638 joydev->glue.JS_CORR = ds32.JS_CORR;
643 ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT;
644 ds32.BUSY = joydev->glue.BUSY;
645 ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
646 ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT;
647 ds32.JS_SAVE = joydev->glue.JS_SAVE;
648 ds32.JS_CORR = joydev->glue.JS_CORR;
650 retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
654 retval = joydev_ioctl_common(joydev, cmd, argp);
659 mutex_unlock(&joydev->mutex);
662 #endif /* CONFIG_COMPAT */
664 static long joydev_ioctl(struct file *file,
665 unsigned int cmd, unsigned long arg)
667 struct joydev_client *client = file->private_data;
668 struct joydev *joydev = client->joydev;
669 void __user *argp = (void __user *)arg;
672 retval = mutex_lock_interruptible(&joydev->mutex);
676 if (!joydev->exist) {
683 case JS_SET_TIMELIMIT:
684 retval = get_user(joydev->glue.JS_TIMELIMIT,
685 (long __user *) arg);
688 case JS_GET_TIMELIMIT:
689 retval = put_user(joydev->glue.JS_TIMELIMIT,
690 (long __user *) arg);
694 retval = copy_from_user(&joydev->glue, argp,
695 sizeof(joydev->glue)) ? -EFAULT : 0;
699 retval = copy_to_user(argp, &joydev->glue,
700 sizeof(joydev->glue)) ? -EFAULT : 0;
704 retval = joydev_ioctl_common(joydev, cmd, argp);
708 mutex_unlock(&joydev->mutex);
712 static const struct file_operations joydev_fops = {
713 .owner = THIS_MODULE,
717 .release = joydev_release,
718 .unlocked_ioctl = joydev_ioctl,
720 .compat_ioctl = joydev_compat_ioctl,
722 .fasync = joydev_fasync,
727 * Mark device non-existent. This disables writes, ioctls and
728 * prevents new users from opening the device. Already posted
729 * blocking reads will stay, however new ones will fail.
731 static void joydev_mark_dead(struct joydev *joydev)
733 mutex_lock(&joydev->mutex);
734 joydev->exist = false;
735 mutex_unlock(&joydev->mutex);
738 static void joydev_cleanup(struct joydev *joydev)
740 struct input_handle *handle = &joydev->handle;
742 joydev_mark_dead(joydev);
743 joydev_hangup(joydev);
745 cdev_del(&joydev->cdev);
747 /* joydev is marked dead so no one else accesses joydev->open */
749 input_close_device(handle);
753 static bool joydev_match(struct input_handler *handler, struct input_dev *dev)
755 /* Avoid touchpads and touchscreens */
756 if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit))
759 /* Avoid tablets, digitisers and similar devices */
760 if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit))
766 static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
767 const struct input_device_id *id)
769 struct joydev *joydev;
770 int i, j, t, minor, dev_no;
773 minor = input_get_new_minor(JOYDEV_MINOR_BASE, JOYDEV_MINORS, true);
776 pr_err("failed to reserve new minor: %d\n", error);
780 joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
786 INIT_LIST_HEAD(&joydev->client_list);
787 spin_lock_init(&joydev->client_lock);
788 mutex_init(&joydev->mutex);
789 init_waitqueue_head(&joydev->wait);
790 joydev->exist = true;
793 /* Normalize device number if it falls into legacy range */
794 if (dev_no < JOYDEV_MINOR_BASE + JOYDEV_MINORS)
795 dev_no -= JOYDEV_MINOR_BASE;
796 dev_set_name(&joydev->dev, "js%d", dev_no);
798 joydev->handle.dev = input_get_device(dev);
799 joydev->handle.name = dev_name(&joydev->dev);
800 joydev->handle.handler = handler;
801 joydev->handle.private = joydev;
803 for (i = 0; i < ABS_CNT; i++)
804 if (test_bit(i, dev->absbit)) {
805 joydev->absmap[i] = joydev->nabs;
806 joydev->abspam[joydev->nabs] = i;
810 for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
811 if (test_bit(i + BTN_MISC, dev->keybit)) {
812 joydev->keymap[i] = joydev->nkey;
813 joydev->keypam[joydev->nkey] = i + BTN_MISC;
817 for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
818 if (test_bit(i + BTN_MISC, dev->keybit)) {
819 joydev->keymap[i] = joydev->nkey;
820 joydev->keypam[joydev->nkey] = i + BTN_MISC;
824 for (i = 0; i < joydev->nabs; i++) {
825 j = joydev->abspam[i];
826 if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) {
827 joydev->corr[i].type = JS_CORR_NONE;
828 joydev->abs[i] = input_abs_get_val(dev, j);
831 joydev->corr[i].type = JS_CORR_BROKEN;
832 joydev->corr[i].prec = input_abs_get_fuzz(dev, j);
834 t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2;
835 joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j);
836 joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j);
838 t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2
839 - 2 * input_abs_get_flat(dev, j);
841 joydev->corr[i].coef[2] = (1 << 29) / t;
842 joydev->corr[i].coef[3] = (1 << 29) / t;
845 joydev_correct(input_abs_get_val(dev, j),
850 joydev->dev.devt = MKDEV(INPUT_MAJOR, minor);
851 joydev->dev.class = &input_class;
852 joydev->dev.parent = &dev->dev;
853 joydev->dev.release = joydev_free;
854 device_initialize(&joydev->dev);
856 error = input_register_handle(&joydev->handle);
858 goto err_free_joydev;
860 cdev_init(&joydev->cdev, &joydev_fops);
861 error = cdev_add(&joydev->cdev, joydev->dev.devt, 1);
863 goto err_unregister_handle;
865 error = device_add(&joydev->dev);
867 goto err_cleanup_joydev;
872 joydev_cleanup(joydev);
873 err_unregister_handle:
874 input_unregister_handle(&joydev->handle);
876 put_device(&joydev->dev);
878 input_free_minor(minor);
882 static void joydev_disconnect(struct input_handle *handle)
884 struct joydev *joydev = handle->private;
886 device_del(&joydev->dev);
887 joydev_cleanup(joydev);
888 input_free_minor(MINOR(joydev->dev.devt));
889 input_unregister_handle(handle);
890 put_device(&joydev->dev);
893 static const struct input_device_id joydev_ids[] = {
895 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
896 INPUT_DEVICE_ID_MATCH_ABSBIT,
897 .evbit = { BIT_MASK(EV_ABS) },
898 .absbit = { BIT_MASK(ABS_X) },
901 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
902 INPUT_DEVICE_ID_MATCH_ABSBIT,
903 .evbit = { BIT_MASK(EV_ABS) },
904 .absbit = { BIT_MASK(ABS_WHEEL) },
907 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
908 INPUT_DEVICE_ID_MATCH_ABSBIT,
909 .evbit = { BIT_MASK(EV_ABS) },
910 .absbit = { BIT_MASK(ABS_THROTTLE) },
913 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
914 INPUT_DEVICE_ID_MATCH_KEYBIT,
915 .evbit = { BIT_MASK(EV_KEY) },
916 .keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) },
919 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
920 INPUT_DEVICE_ID_MATCH_KEYBIT,
921 .evbit = { BIT_MASK(EV_KEY) },
922 .keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) },
925 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
926 INPUT_DEVICE_ID_MATCH_KEYBIT,
927 .evbit = { BIT_MASK(EV_KEY) },
928 .keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) },
930 { } /* Terminating entry */
933 MODULE_DEVICE_TABLE(input, joydev_ids);
935 static struct input_handler joydev_handler = {
936 .event = joydev_event,
937 .match = joydev_match,
938 .connect = joydev_connect,
939 .disconnect = joydev_disconnect,
940 .legacy_minors = true,
941 .minor = JOYDEV_MINOR_BASE,
943 .id_table = joydev_ids,
946 static int __init joydev_init(void)
948 return input_register_handler(&joydev_handler);
951 static void __exit joydev_exit(void)
953 input_unregister_handler(&joydev_handler);
956 module_init(joydev_init);
957 module_exit(joydev_exit);