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/slab.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>
29 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
30 MODULE_DESCRIPTION("Joystick device interfaces");
31 MODULE_SUPPORTED_DEVICE("input/js");
32 MODULE_LICENSE("GPL");
34 #define JOYDEV_MINOR_BASE 0
35 #define JOYDEV_MINORS 16
36 #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 */
49 struct js_corr corr
[ABS_MAX
+ 1];
50 struct JS_DATA_SAVE_TYPE glue
;
53 __u16 keymap
[KEY_MAX
- BTN_MISC
+ 1];
54 __u16 keypam
[KEY_MAX
- BTN_MISC
+ 1];
55 __u8 absmap
[ABS_MAX
+ 1];
56 __u8 abspam
[ABS_MAX
+ 1];
57 __s16 abs
[ABS_MAX
+ 1];
60 struct joydev_client
{
61 struct js_event buffer
[JOYDEV_BUFFER_SIZE
];
65 spinlock_t buffer_lock
; /* protects access to buffer, head and tail */
66 struct fasync_struct
*fasync
;
67 struct joydev
*joydev
;
68 struct list_head node
;
71 static struct joydev
*joydev_table
[JOYDEV_MINORS
];
72 static DEFINE_MUTEX(joydev_table_mutex
);
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
);
183 static void joydev_detach_client(struct joydev
*joydev
,
184 struct joydev_client
*client
)
186 spin_lock(&joydev
->client_lock
);
187 list_del_rcu(&client
->node
);
188 spin_unlock(&joydev
->client_lock
);
192 static int joydev_open_device(struct joydev
*joydev
)
196 retval
= mutex_lock_interruptible(&joydev
->mutex
);
202 else if (!joydev
->open
++) {
203 retval
= input_open_device(&joydev
->handle
);
208 mutex_unlock(&joydev
->mutex
);
212 static void joydev_close_device(struct joydev
*joydev
)
214 mutex_lock(&joydev
->mutex
);
216 if (joydev
->exist
&& !--joydev
->open
)
217 input_close_device(&joydev
->handle
);
219 mutex_unlock(&joydev
->mutex
);
223 * Wake up users waiting for IO so they can disconnect from
226 static void joydev_hangup(struct joydev
*joydev
)
228 struct joydev_client
*client
;
230 spin_lock(&joydev
->client_lock
);
231 list_for_each_entry(client
, &joydev
->client_list
, node
)
232 kill_fasync(&client
->fasync
, SIGIO
, POLL_HUP
);
233 spin_unlock(&joydev
->client_lock
);
235 wake_up_interruptible(&joydev
->wait
);
238 static int joydev_release(struct inode
*inode
, struct file
*file
)
240 struct joydev_client
*client
= file
->private_data
;
241 struct joydev
*joydev
= client
->joydev
;
243 joydev_detach_client(joydev
, client
);
246 joydev_close_device(joydev
);
247 put_device(&joydev
->dev
);
252 static int joydev_open(struct inode
*inode
, struct file
*file
)
254 struct joydev_client
*client
;
255 struct joydev
*joydev
;
256 int i
= iminor(inode
) - JOYDEV_MINOR_BASE
;
259 if (i
>= JOYDEV_MINORS
)
262 error
= mutex_lock_interruptible(&joydev_table_mutex
);
265 joydev
= joydev_table
[i
];
267 get_device(&joydev
->dev
);
268 mutex_unlock(&joydev_table_mutex
);
273 client
= kzalloc(sizeof(struct joydev_client
), GFP_KERNEL
);
279 spin_lock_init(&client
->buffer_lock
);
280 client
->joydev
= joydev
;
281 joydev_attach_client(joydev
, client
);
283 error
= joydev_open_device(joydev
);
285 goto err_free_client
;
287 file
->private_data
= client
;
291 joydev_detach_client(joydev
, client
);
294 put_device(&joydev
->dev
);
298 static int joydev_generate_startup_event(struct joydev_client
*client
,
299 struct input_dev
*input
,
300 struct js_event
*event
)
302 struct joydev
*joydev
= client
->joydev
;
305 spin_lock_irq(&client
->buffer_lock
);
307 have_event
= client
->startup
< joydev
->nabs
+ joydev
->nkey
;
311 event
->time
= jiffies_to_msecs(jiffies
);
312 if (client
->startup
< joydev
->nkey
) {
313 event
->type
= JS_EVENT_BUTTON
| JS_EVENT_INIT
;
314 event
->number
= client
->startup
;
315 event
->value
= !!test_bit(joydev
->keypam
[event
->number
],
318 event
->type
= JS_EVENT_AXIS
| JS_EVENT_INIT
;
319 event
->number
= client
->startup
- joydev
->nkey
;
320 event
->value
= joydev
->abs
[event
->number
];
325 spin_unlock_irq(&client
->buffer_lock
);
330 static int joydev_fetch_next_event(struct joydev_client
*client
,
331 struct js_event
*event
)
335 spin_lock_irq(&client
->buffer_lock
);
337 have_event
= client
->head
!= client
->tail
;
339 *event
= client
->buffer
[client
->tail
++];
340 client
->tail
&= JOYDEV_BUFFER_SIZE
- 1;
343 spin_unlock_irq(&client
->buffer_lock
);
349 * Old joystick interface
351 static ssize_t
joydev_0x_read(struct joydev_client
*client
,
352 struct input_dev
*input
,
355 struct joydev
*joydev
= client
->joydev
;
356 struct JS_DATA_TYPE data
;
359 spin_lock_irq(&input
->event_lock
);
364 for (data
.buttons
= i
= 0; i
< 32 && i
< joydev
->nkey
; i
++)
366 test_bit(joydev
->keypam
[i
], input
->key
) ? (1 << i
) : 0;
367 data
.x
= (joydev
->abs
[0] / 256 + 128) >> joydev
->glue
.JS_CORR
.x
;
368 data
.y
= (joydev
->abs
[1] / 256 + 128) >> joydev
->glue
.JS_CORR
.y
;
371 * Reset reader's event queue
373 spin_lock(&client
->buffer_lock
);
375 client
->tail
= client
->head
;
376 spin_unlock(&client
->buffer_lock
);
378 spin_unlock_irq(&input
->event_lock
);
380 if (copy_to_user(buf
, &data
, sizeof(struct JS_DATA_TYPE
)))
383 return sizeof(struct JS_DATA_TYPE
);
386 static inline int joydev_data_pending(struct joydev_client
*client
)
388 struct joydev
*joydev
= client
->joydev
;
390 return client
->startup
< joydev
->nabs
+ joydev
->nkey
||
391 client
->head
!= client
->tail
;
394 static ssize_t
joydev_read(struct file
*file
, char __user
*buf
,
395 size_t count
, loff_t
*ppos
)
397 struct joydev_client
*client
= file
->private_data
;
398 struct joydev
*joydev
= client
->joydev
;
399 struct input_dev
*input
= joydev
->handle
.dev
;
400 struct js_event event
;
406 if (count
< sizeof(struct js_event
))
409 if (count
== sizeof(struct JS_DATA_TYPE
))
410 return joydev_0x_read(client
, input
, buf
);
412 if (!joydev_data_pending(client
) && (file
->f_flags
& O_NONBLOCK
))
415 retval
= wait_event_interruptible(joydev
->wait
,
416 !joydev
->exist
|| joydev_data_pending(client
));
423 while (retval
+ sizeof(struct js_event
) <= count
&&
424 joydev_generate_startup_event(client
, input
, &event
)) {
426 if (copy_to_user(buf
+ retval
, &event
, sizeof(struct js_event
)))
429 retval
+= sizeof(struct js_event
);
432 while (retval
+ sizeof(struct js_event
) <= count
&&
433 joydev_fetch_next_event(client
, &event
)) {
435 if (copy_to_user(buf
+ retval
, &event
, sizeof(struct js_event
)))
438 retval
+= sizeof(struct js_event
);
444 /* No kernel lock - fine */
445 static unsigned int joydev_poll(struct file
*file
, poll_table
*wait
)
447 struct joydev_client
*client
= file
->private_data
;
448 struct joydev
*joydev
= client
->joydev
;
450 poll_wait(file
, &joydev
->wait
, wait
);
451 return (joydev_data_pending(client
) ? (POLLIN
| POLLRDNORM
) : 0) |
452 (joydev
->exist
? 0 : (POLLHUP
| POLLERR
));
455 static int joydev_ioctl_common(struct joydev
*joydev
,
456 unsigned int cmd
, void __user
*argp
)
458 struct input_dev
*dev
= joydev
->handle
.dev
;
464 return copy_from_user(&joydev
->glue
.JS_CORR
, argp
,
465 sizeof(joydev
->glue
.JS_CORR
)) ? -EFAULT
: 0;
468 return copy_to_user(argp
, &joydev
->glue
.JS_CORR
,
469 sizeof(joydev
->glue
.JS_CORR
)) ? -EFAULT
: 0;
472 return get_user(joydev
->glue
.JS_TIMEOUT
, (s32 __user
*) argp
);
475 return put_user(joydev
->glue
.JS_TIMEOUT
, (s32 __user
*) argp
);
478 return put_user(JS_VERSION
, (__u32 __user
*) argp
);
481 return put_user(joydev
->nabs
, (__u8 __user
*) argp
);
484 return put_user(joydev
->nkey
, (__u8 __user
*) argp
);
487 if (copy_from_user(joydev
->corr
, argp
,
488 sizeof(joydev
->corr
[0]) * joydev
->nabs
))
491 for (i
= 0; i
< joydev
->nabs
; i
++) {
492 j
= joydev
->abspam
[i
];
493 joydev
->abs
[i
] = joydev_correct(dev
->abs
[j
],
499 return copy_to_user(argp
, joydev
->corr
,
500 sizeof(joydev
->corr
[0]) * joydev
->nabs
) ? -EFAULT
: 0;
503 if (copy_from_user(joydev
->abspam
, argp
,
504 sizeof(__u8
) * (ABS_MAX
+ 1)))
507 for (i
= 0; i
< joydev
->nabs
; i
++) {
508 if (joydev
->abspam
[i
] > ABS_MAX
)
510 joydev
->absmap
[joydev
->abspam
[i
]] = i
;
515 return copy_to_user(argp
, joydev
->abspam
,
516 sizeof(__u8
) * (ABS_MAX
+ 1)) ? -EFAULT
: 0;
519 if (copy_from_user(joydev
->keypam
, argp
,
520 sizeof(__u16
) * (KEY_MAX
- BTN_MISC
+ 1)))
523 for (i
= 0; i
< joydev
->nkey
; i
++) {
524 if (joydev
->keypam
[i
] > KEY_MAX
||
525 joydev
->keypam
[i
] < BTN_MISC
)
527 joydev
->keymap
[joydev
->keypam
[i
] - BTN_MISC
] = i
;
533 return copy_to_user(argp
, joydev
->keypam
,
534 sizeof(__u16
) * (KEY_MAX
- BTN_MISC
+ 1)) ? -EFAULT
: 0;
537 if ((cmd
& ~IOCSIZE_MASK
) == JSIOCGNAME(0)) {
539 const char *name
= dev_name(&dev
->dev
);
543 len
= strlen(name
) + 1;
544 if (len
> _IOC_SIZE(cmd
))
545 len
= _IOC_SIZE(cmd
);
546 if (copy_to_user(argp
, name
, len
))
555 static long joydev_compat_ioctl(struct file
*file
,
556 unsigned int cmd
, unsigned long arg
)
558 struct joydev_client
*client
= file
->private_data
;
559 struct joydev
*joydev
= client
->joydev
;
560 void __user
*argp
= (void __user
*)arg
;
562 struct JS_DATA_SAVE_TYPE_32 ds32
;
565 retval
= mutex_lock_interruptible(&joydev
->mutex
);
569 if (!joydev
->exist
) {
576 case JS_SET_TIMELIMIT
:
577 retval
= get_user(tmp32
, (s32 __user
*) arg
);
579 joydev
->glue
.JS_TIMELIMIT
= tmp32
;
582 case JS_GET_TIMELIMIT
:
583 tmp32
= joydev
->glue
.JS_TIMELIMIT
;
584 retval
= put_user(tmp32
, (s32 __user
*) arg
);
588 retval
= copy_from_user(&ds32
, argp
,
589 sizeof(ds32
)) ? -EFAULT
: 0;
591 joydev
->glue
.JS_TIMEOUT
= ds32
.JS_TIMEOUT
;
592 joydev
->glue
.BUSY
= ds32
.BUSY
;
593 joydev
->glue
.JS_EXPIRETIME
= ds32
.JS_EXPIRETIME
;
594 joydev
->glue
.JS_TIMELIMIT
= ds32
.JS_TIMELIMIT
;
595 joydev
->glue
.JS_SAVE
= ds32
.JS_SAVE
;
596 joydev
->glue
.JS_CORR
= ds32
.JS_CORR
;
601 ds32
.JS_TIMEOUT
= joydev
->glue
.JS_TIMEOUT
;
602 ds32
.BUSY
= joydev
->glue
.BUSY
;
603 ds32
.JS_EXPIRETIME
= joydev
->glue
.JS_EXPIRETIME
;
604 ds32
.JS_TIMELIMIT
= joydev
->glue
.JS_TIMELIMIT
;
605 ds32
.JS_SAVE
= joydev
->glue
.JS_SAVE
;
606 ds32
.JS_CORR
= joydev
->glue
.JS_CORR
;
608 retval
= copy_to_user(argp
, &ds32
, sizeof(ds32
)) ? -EFAULT
: 0;
612 retval
= joydev_ioctl_common(joydev
, cmd
, argp
);
617 mutex_unlock(&joydev
->mutex
);
620 #endif /* CONFIG_COMPAT */
622 static long joydev_ioctl(struct file
*file
,
623 unsigned int cmd
, unsigned long arg
)
625 struct joydev_client
*client
= file
->private_data
;
626 struct joydev
*joydev
= client
->joydev
;
627 void __user
*argp
= (void __user
*)arg
;
630 retval
= mutex_lock_interruptible(&joydev
->mutex
);
634 if (!joydev
->exist
) {
641 case JS_SET_TIMELIMIT
:
642 retval
= get_user(joydev
->glue
.JS_TIMELIMIT
,
643 (long __user
*) arg
);
646 case JS_GET_TIMELIMIT
:
647 retval
= put_user(joydev
->glue
.JS_TIMELIMIT
,
648 (long __user
*) arg
);
652 retval
= copy_from_user(&joydev
->glue
, argp
,
653 sizeof(joydev
->glue
)) ? -EFAULT
: 0;
657 retval
= copy_to_user(argp
, &joydev
->glue
,
658 sizeof(joydev
->glue
)) ? -EFAULT
: 0;
662 retval
= joydev_ioctl_common(joydev
, cmd
, argp
);
666 mutex_unlock(&joydev
->mutex
);
670 static const struct file_operations joydev_fops
= {
671 .owner
= THIS_MODULE
,
675 .release
= joydev_release
,
676 .unlocked_ioctl
= joydev_ioctl
,
678 .compat_ioctl
= joydev_compat_ioctl
,
680 .fasync
= joydev_fasync
,
683 static int joydev_install_chrdev(struct joydev
*joydev
)
685 joydev_table
[joydev
->minor
] = joydev
;
689 static void joydev_remove_chrdev(struct joydev
*joydev
)
691 mutex_lock(&joydev_table_mutex
);
692 joydev_table
[joydev
->minor
] = NULL
;
693 mutex_unlock(&joydev_table_mutex
);
697 * Mark device non-existant. This disables writes, ioctls and
698 * prevents new users from opening the device. Already posted
699 * blocking reads will stay, however new ones will fail.
701 static void joydev_mark_dead(struct joydev
*joydev
)
703 mutex_lock(&joydev
->mutex
);
705 mutex_unlock(&joydev
->mutex
);
708 static void joydev_cleanup(struct joydev
*joydev
)
710 struct input_handle
*handle
= &joydev
->handle
;
712 joydev_mark_dead(joydev
);
713 joydev_hangup(joydev
);
714 joydev_remove_chrdev(joydev
);
716 /* joydev is marked dead so noone else accesses joydev->open */
718 input_close_device(handle
);
721 static int joydev_connect(struct input_handler
*handler
, struct input_dev
*dev
,
722 const struct input_device_id
*id
)
724 struct joydev
*joydev
;
728 for (minor
= 0; minor
< JOYDEV_MINORS
; minor
++)
729 if (!joydev_table
[minor
])
732 if (minor
== JOYDEV_MINORS
) {
733 printk(KERN_ERR
"joydev: no more free joydev devices\n");
737 joydev
= kzalloc(sizeof(struct joydev
), GFP_KERNEL
);
741 INIT_LIST_HEAD(&joydev
->client_list
);
742 spin_lock_init(&joydev
->client_lock
);
743 mutex_init(&joydev
->mutex
);
744 init_waitqueue_head(&joydev
->wait
);
746 dev_set_name(&joydev
->dev
, "js%d", minor
);
748 joydev
->minor
= minor
;
751 joydev
->handle
.dev
= input_get_device(dev
);
752 joydev
->handle
.name
= dev_name(&joydev
->dev
);
753 joydev
->handle
.handler
= handler
;
754 joydev
->handle
.private = joydev
;
756 for (i
= 0; i
< ABS_MAX
+ 1; i
++)
757 if (test_bit(i
, dev
->absbit
)) {
758 joydev
->absmap
[i
] = joydev
->nabs
;
759 joydev
->abspam
[joydev
->nabs
] = i
;
763 for (i
= BTN_JOYSTICK
- BTN_MISC
; i
< KEY_MAX
- BTN_MISC
+ 1; i
++)
764 if (test_bit(i
+ BTN_MISC
, dev
->keybit
)) {
765 joydev
->keymap
[i
] = joydev
->nkey
;
766 joydev
->keypam
[joydev
->nkey
] = i
+ BTN_MISC
;
770 for (i
= 0; i
< BTN_JOYSTICK
- BTN_MISC
; i
++)
771 if (test_bit(i
+ BTN_MISC
, dev
->keybit
)) {
772 joydev
->keymap
[i
] = joydev
->nkey
;
773 joydev
->keypam
[joydev
->nkey
] = i
+ BTN_MISC
;
777 for (i
= 0; i
< joydev
->nabs
; i
++) {
778 j
= joydev
->abspam
[i
];
779 if (dev
->absmax
[j
] == dev
->absmin
[j
]) {
780 joydev
->corr
[i
].type
= JS_CORR_NONE
;
781 joydev
->abs
[i
] = dev
->abs
[j
];
784 joydev
->corr
[i
].type
= JS_CORR_BROKEN
;
785 joydev
->corr
[i
].prec
= dev
->absfuzz
[j
];
786 joydev
->corr
[i
].coef
[0] =
787 (dev
->absmax
[j
] + dev
->absmin
[j
]) / 2 - dev
->absflat
[j
];
788 joydev
->corr
[i
].coef
[1] =
789 (dev
->absmax
[j
] + dev
->absmin
[j
]) / 2 + dev
->absflat
[j
];
791 t
= (dev
->absmax
[j
] - dev
->absmin
[j
]) / 2 - 2 * dev
->absflat
[j
];
793 joydev
->corr
[i
].coef
[2] = (1 << 29) / t
;
794 joydev
->corr
[i
].coef
[3] = (1 << 29) / t
;
796 joydev
->abs
[i
] = joydev_correct(dev
->abs
[j
],
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
);
807 error
= input_register_handle(&joydev
->handle
);
809 goto err_free_joydev
;
811 error
= joydev_install_chrdev(joydev
);
813 goto err_unregister_handle
;
815 error
= device_add(&joydev
->dev
);
817 goto err_cleanup_joydev
;
822 joydev_cleanup(joydev
);
823 err_unregister_handle
:
824 input_unregister_handle(&joydev
->handle
);
826 put_device(&joydev
->dev
);
830 static void joydev_disconnect(struct input_handle
*handle
)
832 struct joydev
*joydev
= handle
->private;
834 device_del(&joydev
->dev
);
835 joydev_cleanup(joydev
);
836 input_unregister_handle(handle
);
837 put_device(&joydev
->dev
);
840 static const struct input_device_id joydev_blacklist
[] = {
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 }, /* Avoid itouchpads and touchscreens */
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 }, /* Avoid tablets, digitisers and similar devices */
853 { } /* Terminating entry */
856 static const struct input_device_id joydev_ids
[] = {
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
) },
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
) },
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
) },
875 { } /* Terminating entry */
878 MODULE_DEVICE_TABLE(input
, joydev_ids
);
880 static 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
,
887 .id_table
= joydev_ids
,
888 .blacklist
= joydev_blacklist
,
891 static int __init
joydev_init(void)
893 return input_register_handler(&joydev_handler
);
896 static void __exit
joydev_exit(void)
898 input_unregister_handler(&joydev_handler
);
901 module_init(joydev_init
);
902 module_exit(joydev_exit
);