4 * Copyright (c) 1999-2002 Vojtech Pavlik
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
13 #include <linux/init.h>
14 #include <linux/input.h>
15 #include <linux/module.h>
16 #include <linux/random.h>
17 #include <linux/major.h>
18 #include <linux/proc_fs.h>
19 #include <linux/seq_file.h>
20 #include <linux/interrupt.h>
21 #include <linux/poll.h>
22 #include <linux/device.h>
23 #include <linux/mutex.h>
25 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
26 MODULE_DESCRIPTION("Input core");
27 MODULE_LICENSE("GPL");
29 #define INPUT_DEVICES 256
31 static LIST_HEAD(input_dev_list
);
32 static LIST_HEAD(input_handler_list
);
34 static struct input_handler
*input_table
[8];
37 * input_event() - report new input event
38 * @dev: device that generated the event
39 * @type: type of the event
41 * @value: value of the event
43 * This function should be used by drivers implementing various input devices
44 * See also input_inject_event()
46 void input_event(struct input_dev
*dev
, unsigned int type
, unsigned int code
, int value
)
48 struct input_handle
*handle
;
50 if (type
> EV_MAX
|| !test_bit(type
, dev
->evbit
))
53 add_input_randomness(type
, code
, value
);
61 dev
->event(dev
, type
, code
, value
);
74 if (code
> KEY_MAX
|| !test_bit(code
, dev
->keybit
) || !!test_bit(code
, dev
->key
) == value
)
80 change_bit(code
, dev
->key
);
82 if (test_bit(EV_REP
, dev
->evbit
) && dev
->rep
[REP_PERIOD
] && dev
->rep
[REP_DELAY
] && dev
->timer
.data
&& value
) {
83 dev
->repeat_key
= code
;
84 mod_timer(&dev
->timer
, jiffies
+ msecs_to_jiffies(dev
->rep
[REP_DELAY
]));
91 if (code
> SW_MAX
|| !test_bit(code
, dev
->swbit
) || !!test_bit(code
, dev
->sw
) == value
)
94 change_bit(code
, dev
->sw
);
100 if (code
> ABS_MAX
|| !test_bit(code
, dev
->absbit
))
103 if (dev
->absfuzz
[code
]) {
104 if ((value
> dev
->abs
[code
] - (dev
->absfuzz
[code
] >> 1)) &&
105 (value
< dev
->abs
[code
] + (dev
->absfuzz
[code
] >> 1)))
108 if ((value
> dev
->abs
[code
] - dev
->absfuzz
[code
]) &&
109 (value
< dev
->abs
[code
] + dev
->absfuzz
[code
]))
110 value
= (dev
->abs
[code
] * 3 + value
) >> 2;
112 if ((value
> dev
->abs
[code
] - (dev
->absfuzz
[code
] << 1)) &&
113 (value
< dev
->abs
[code
] + (dev
->absfuzz
[code
] << 1)))
114 value
= (dev
->abs
[code
] + value
) >> 1;
117 if (dev
->abs
[code
] == value
)
120 dev
->abs
[code
] = value
;
125 if (code
> REL_MAX
|| !test_bit(code
, dev
->relbit
) || (value
== 0))
132 if (code
> MSC_MAX
|| !test_bit(code
, dev
->mscbit
))
136 dev
->event(dev
, type
, code
, value
);
142 if (code
> LED_MAX
|| !test_bit(code
, dev
->ledbit
) || !!test_bit(code
, dev
->led
) == value
)
145 change_bit(code
, dev
->led
);
148 dev
->event(dev
, type
, code
, value
);
154 if (code
> SND_MAX
|| !test_bit(code
, dev
->sndbit
))
157 if (!!test_bit(code
, dev
->snd
) != !!value
)
158 change_bit(code
, dev
->snd
);
161 dev
->event(dev
, type
, code
, value
);
167 if (code
> REP_MAX
|| value
< 0 || dev
->rep
[code
] == value
)
170 dev
->rep
[code
] = value
;
172 dev
->event(dev
, type
, code
, value
);
182 dev
->event(dev
, type
, code
, value
);
190 dev
->grab
->handler
->event(dev
->grab
, type
, code
, value
);
192 list_for_each_entry(handle
, &dev
->h_list
, d_node
)
194 handle
->handler
->event(handle
, type
, code
, value
);
196 EXPORT_SYMBOL(input_event
);
199 * input_inject_event() - send input event from input handler
200 * @handle: input handle to send event through
201 * @type: type of the event
203 * @value: value of the event
205 * Similar to input_event() but will ignore event if device is "grabbed" and handle
206 * injecting event is not the one that owns the device.
208 void input_inject_event(struct input_handle
*handle
, unsigned int type
, unsigned int code
, int value
)
210 if (!handle
->dev
->grab
|| handle
->dev
->grab
== handle
)
211 input_event(handle
->dev
, type
, code
, value
);
213 EXPORT_SYMBOL(input_inject_event
);
215 static void input_repeat_key(unsigned long data
)
217 struct input_dev
*dev
= (void *) data
;
219 if (!test_bit(dev
->repeat_key
, dev
->key
))
222 input_event(dev
, EV_KEY
, dev
->repeat_key
, 2);
225 if (dev
->rep
[REP_PERIOD
])
226 mod_timer(&dev
->timer
, jiffies
+ msecs_to_jiffies(dev
->rep
[REP_PERIOD
]));
229 int input_grab_device(struct input_handle
*handle
)
231 if (handle
->dev
->grab
)
234 handle
->dev
->grab
= handle
;
237 EXPORT_SYMBOL(input_grab_device
);
239 void input_release_device(struct input_handle
*handle
)
241 struct input_dev
*dev
= handle
->dev
;
243 if (dev
->grab
== handle
) {
246 list_for_each_entry(handle
, &dev
->h_list
, d_node
)
247 if (handle
->handler
->start
)
248 handle
->handler
->start(handle
);
251 EXPORT_SYMBOL(input_release_device
);
253 int input_open_device(struct input_handle
*handle
)
255 struct input_dev
*dev
= handle
->dev
;
258 err
= mutex_lock_interruptible(&dev
->mutex
);
264 if (!dev
->users
++ && dev
->open
)
265 err
= dev
->open(dev
);
270 mutex_unlock(&dev
->mutex
);
274 EXPORT_SYMBOL(input_open_device
);
276 int input_flush_device(struct input_handle
* handle
, struct file
* file
)
278 if (handle
->dev
->flush
)
279 return handle
->dev
->flush(handle
->dev
, file
);
283 EXPORT_SYMBOL(input_flush_device
);
285 void input_close_device(struct input_handle
*handle
)
287 struct input_dev
*dev
= handle
->dev
;
289 input_release_device(handle
);
291 mutex_lock(&dev
->mutex
);
293 if (!--dev
->users
&& dev
->close
)
297 mutex_unlock(&dev
->mutex
);
299 EXPORT_SYMBOL(input_close_device
);
301 static int input_fetch_keycode(struct input_dev
*dev
, int scancode
)
303 switch (dev
->keycodesize
) {
305 return ((u8
*)dev
->keycode
)[scancode
];
308 return ((u16
*)dev
->keycode
)[scancode
];
311 return ((u32
*)dev
->keycode
)[scancode
];
315 static int input_default_getkeycode(struct input_dev
*dev
,
316 int scancode
, int *keycode
)
318 if (!dev
->keycodesize
)
321 if (scancode
< 0 || scancode
>= dev
->keycodemax
)
324 *keycode
= input_fetch_keycode(dev
, scancode
);
329 static int input_default_setkeycode(struct input_dev
*dev
,
330 int scancode
, int keycode
)
335 if (scancode
< 0 || scancode
>= dev
->keycodemax
)
338 if (keycode
< 0 || keycode
> KEY_MAX
)
341 if (!dev
->keycodesize
)
344 if (dev
->keycodesize
< sizeof(keycode
) && (keycode
>> (dev
->keycodesize
* 8)))
347 switch (dev
->keycodesize
) {
349 u8
*k
= (u8
*)dev
->keycode
;
350 old_keycode
= k
[scancode
];
351 k
[scancode
] = keycode
;
355 u16
*k
= (u16
*)dev
->keycode
;
356 old_keycode
= k
[scancode
];
357 k
[scancode
] = keycode
;
361 u32
*k
= (u32
*)dev
->keycode
;
362 old_keycode
= k
[scancode
];
363 k
[scancode
] = keycode
;
368 clear_bit(old_keycode
, dev
->keybit
);
369 set_bit(keycode
, dev
->keybit
);
371 for (i
= 0; i
< dev
->keycodemax
; i
++) {
372 if (input_fetch_keycode(dev
, i
) == old_keycode
) {
373 set_bit(old_keycode
, dev
->keybit
);
374 break; /* Setting the bit twice is useless, so break */
382 #define MATCH_BIT(bit, max) \
383 for (i = 0; i < NBITS(max); i++) \
384 if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
386 if (i != NBITS(max)) \
389 static const struct input_device_id
*input_match_device(const struct input_device_id
*id
,
390 struct input_dev
*dev
)
394 for (; id
->flags
|| id
->driver_info
; id
++) {
396 if (id
->flags
& INPUT_DEVICE_ID_MATCH_BUS
)
397 if (id
->bustype
!= dev
->id
.bustype
)
400 if (id
->flags
& INPUT_DEVICE_ID_MATCH_VENDOR
)
401 if (id
->vendor
!= dev
->id
.vendor
)
404 if (id
->flags
& INPUT_DEVICE_ID_MATCH_PRODUCT
)
405 if (id
->product
!= dev
->id
.product
)
408 if (id
->flags
& INPUT_DEVICE_ID_MATCH_VERSION
)
409 if (id
->version
!= dev
->id
.version
)
412 MATCH_BIT(evbit
, EV_MAX
);
413 MATCH_BIT(keybit
, KEY_MAX
);
414 MATCH_BIT(relbit
, REL_MAX
);
415 MATCH_BIT(absbit
, ABS_MAX
);
416 MATCH_BIT(mscbit
, MSC_MAX
);
417 MATCH_BIT(ledbit
, LED_MAX
);
418 MATCH_BIT(sndbit
, SND_MAX
);
419 MATCH_BIT(ffbit
, FF_MAX
);
420 MATCH_BIT(swbit
, SW_MAX
);
428 static int input_attach_handler(struct input_dev
*dev
, struct input_handler
*handler
)
430 const struct input_device_id
*id
;
433 if (handler
->blacklist
&& input_match_device(handler
->blacklist
, dev
))
436 id
= input_match_device(handler
->id_table
, dev
);
440 error
= handler
->connect(handler
, dev
, id
);
441 if (error
&& error
!= -ENODEV
)
443 "input: failed to attach handler %s to device %s, "
445 handler
->name
, kobject_name(&dev
->dev
.kobj
), error
);
451 #ifdef CONFIG_PROC_FS
453 static struct proc_dir_entry
*proc_bus_input_dir
;
454 static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait
);
455 static int input_devices_state
;
457 static inline void input_wakeup_procfs_readers(void)
459 input_devices_state
++;
460 wake_up(&input_devices_poll_wait
);
463 static unsigned int input_proc_devices_poll(struct file
*file
, poll_table
*wait
)
465 int state
= input_devices_state
;
467 poll_wait(file
, &input_devices_poll_wait
, wait
);
468 if (state
!= input_devices_state
)
469 return POLLIN
| POLLRDNORM
;
474 static void *input_devices_seq_start(struct seq_file
*seq
, loff_t
*pos
)
476 /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
478 return seq_list_start(&input_dev_list
, *pos
);
481 static void *input_devices_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
483 return seq_list_next(v
, &input_dev_list
, pos
);
486 static void input_devices_seq_stop(struct seq_file
*seq
, void *v
)
488 /* release lock here */
491 static void input_seq_print_bitmap(struct seq_file
*seq
, const char *name
,
492 unsigned long *bitmap
, int max
)
496 for (i
= NBITS(max
) - 1; i
> 0; i
--)
500 seq_printf(seq
, "B: %s=", name
);
502 seq_printf(seq
, "%lx%s", bitmap
[i
], i
> 0 ? " " : "");
506 static int input_devices_seq_show(struct seq_file
*seq
, void *v
)
508 struct input_dev
*dev
= container_of(v
, struct input_dev
, node
);
509 const char *path
= kobject_get_path(&dev
->dev
.kobj
, GFP_KERNEL
);
510 struct input_handle
*handle
;
512 seq_printf(seq
, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
513 dev
->id
.bustype
, dev
->id
.vendor
, dev
->id
.product
, dev
->id
.version
);
515 seq_printf(seq
, "N: Name=\"%s\"\n", dev
->name
? dev
->name
: "");
516 seq_printf(seq
, "P: Phys=%s\n", dev
->phys
? dev
->phys
: "");
517 seq_printf(seq
, "S: Sysfs=%s\n", path
? path
: "");
518 seq_printf(seq
, "U: Uniq=%s\n", dev
->uniq
? dev
->uniq
: "");
519 seq_printf(seq
, "H: Handlers=");
521 list_for_each_entry(handle
, &dev
->h_list
, d_node
)
522 seq_printf(seq
, "%s ", handle
->name
);
525 input_seq_print_bitmap(seq
, "EV", dev
->evbit
, EV_MAX
);
526 if (test_bit(EV_KEY
, dev
->evbit
))
527 input_seq_print_bitmap(seq
, "KEY", dev
->keybit
, KEY_MAX
);
528 if (test_bit(EV_REL
, dev
->evbit
))
529 input_seq_print_bitmap(seq
, "REL", dev
->relbit
, REL_MAX
);
530 if (test_bit(EV_ABS
, dev
->evbit
))
531 input_seq_print_bitmap(seq
, "ABS", dev
->absbit
, ABS_MAX
);
532 if (test_bit(EV_MSC
, dev
->evbit
))
533 input_seq_print_bitmap(seq
, "MSC", dev
->mscbit
, MSC_MAX
);
534 if (test_bit(EV_LED
, dev
->evbit
))
535 input_seq_print_bitmap(seq
, "LED", dev
->ledbit
, LED_MAX
);
536 if (test_bit(EV_SND
, dev
->evbit
))
537 input_seq_print_bitmap(seq
, "SND", dev
->sndbit
, SND_MAX
);
538 if (test_bit(EV_FF
, dev
->evbit
))
539 input_seq_print_bitmap(seq
, "FF", dev
->ffbit
, FF_MAX
);
540 if (test_bit(EV_SW
, dev
->evbit
))
541 input_seq_print_bitmap(seq
, "SW", dev
->swbit
, SW_MAX
);
549 static struct seq_operations input_devices_seq_ops
= {
550 .start
= input_devices_seq_start
,
551 .next
= input_devices_seq_next
,
552 .stop
= input_devices_seq_stop
,
553 .show
= input_devices_seq_show
,
556 static int input_proc_devices_open(struct inode
*inode
, struct file
*file
)
558 return seq_open(file
, &input_devices_seq_ops
);
561 static const struct file_operations input_devices_fileops
= {
562 .owner
= THIS_MODULE
,
563 .open
= input_proc_devices_open
,
564 .poll
= input_proc_devices_poll
,
567 .release
= seq_release
,
570 static void *input_handlers_seq_start(struct seq_file
*seq
, loff_t
*pos
)
572 /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
573 seq
->private = (void *)(unsigned long)*pos
;
574 return seq_list_start(&input_handler_list
, *pos
);
577 static void *input_handlers_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
579 seq
->private = (void *)(unsigned long)(*pos
+ 1);
580 return seq_list_next(v
, &input_handler_list
, pos
);
583 static void input_handlers_seq_stop(struct seq_file
*seq
, void *v
)
585 /* release lock here */
588 static int input_handlers_seq_show(struct seq_file
*seq
, void *v
)
590 struct input_handler
*handler
= container_of(v
, struct input_handler
, node
);
592 seq_printf(seq
, "N: Number=%ld Name=%s",
593 (unsigned long)seq
->private, handler
->name
);
595 seq_printf(seq
, " Minor=%d", handler
->minor
);
600 static struct seq_operations input_handlers_seq_ops
= {
601 .start
= input_handlers_seq_start
,
602 .next
= input_handlers_seq_next
,
603 .stop
= input_handlers_seq_stop
,
604 .show
= input_handlers_seq_show
,
607 static int input_proc_handlers_open(struct inode
*inode
, struct file
*file
)
609 return seq_open(file
, &input_handlers_seq_ops
);
612 static const struct file_operations input_handlers_fileops
= {
613 .owner
= THIS_MODULE
,
614 .open
= input_proc_handlers_open
,
617 .release
= seq_release
,
620 static int __init
input_proc_init(void)
622 struct proc_dir_entry
*entry
;
624 proc_bus_input_dir
= proc_mkdir("input", proc_bus
);
625 if (!proc_bus_input_dir
)
628 proc_bus_input_dir
->owner
= THIS_MODULE
;
630 entry
= create_proc_entry("devices", 0, proc_bus_input_dir
);
634 entry
->owner
= THIS_MODULE
;
635 entry
->proc_fops
= &input_devices_fileops
;
637 entry
= create_proc_entry("handlers", 0, proc_bus_input_dir
);
641 entry
->owner
= THIS_MODULE
;
642 entry
->proc_fops
= &input_handlers_fileops
;
646 fail2
: remove_proc_entry("devices", proc_bus_input_dir
);
647 fail1
: remove_proc_entry("input", proc_bus
);
651 static void input_proc_exit(void)
653 remove_proc_entry("devices", proc_bus_input_dir
);
654 remove_proc_entry("handlers", proc_bus_input_dir
);
655 remove_proc_entry("input", proc_bus
);
658 #else /* !CONFIG_PROC_FS */
659 static inline void input_wakeup_procfs_readers(void) { }
660 static inline int input_proc_init(void) { return 0; }
661 static inline void input_proc_exit(void) { }
664 #define INPUT_DEV_STRING_ATTR_SHOW(name) \
665 static ssize_t input_dev_show_##name(struct device *dev, \
666 struct device_attribute *attr, \
669 struct input_dev *input_dev = to_input_dev(dev); \
671 return scnprintf(buf, PAGE_SIZE, "%s\n", \
672 input_dev->name ? input_dev->name : ""); \
674 static DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL)
676 INPUT_DEV_STRING_ATTR_SHOW(name
);
677 INPUT_DEV_STRING_ATTR_SHOW(phys
);
678 INPUT_DEV_STRING_ATTR_SHOW(uniq
);
680 static int input_print_modalias_bits(char *buf
, int size
,
681 char name
, unsigned long *bm
,
682 unsigned int min_bit
, unsigned int max_bit
)
686 len
+= snprintf(buf
, max(size
, 0), "%c", name
);
687 for (i
= min_bit
; i
< max_bit
; i
++)
688 if (bm
[LONG(i
)] & BIT(i
))
689 len
+= snprintf(buf
+ len
, max(size
- len
, 0), "%X,", i
);
693 static int input_print_modalias(char *buf
, int size
, struct input_dev
*id
,
698 len
= snprintf(buf
, max(size
, 0),
699 "input:b%04Xv%04Xp%04Xe%04X-",
700 id
->id
.bustype
, id
->id
.vendor
,
701 id
->id
.product
, id
->id
.version
);
703 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
704 'e', id
->evbit
, 0, EV_MAX
);
705 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
706 'k', id
->keybit
, KEY_MIN_INTERESTING
, KEY_MAX
);
707 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
708 'r', id
->relbit
, 0, REL_MAX
);
709 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
710 'a', id
->absbit
, 0, ABS_MAX
);
711 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
712 'm', id
->mscbit
, 0, MSC_MAX
);
713 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
714 'l', id
->ledbit
, 0, LED_MAX
);
715 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
716 's', id
->sndbit
, 0, SND_MAX
);
717 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
718 'f', id
->ffbit
, 0, FF_MAX
);
719 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
720 'w', id
->swbit
, 0, SW_MAX
);
723 len
+= snprintf(buf
+ len
, max(size
- len
, 0), "\n");
728 static ssize_t
input_dev_show_modalias(struct device
*dev
,
729 struct device_attribute
*attr
,
732 struct input_dev
*id
= to_input_dev(dev
);
735 len
= input_print_modalias(buf
, PAGE_SIZE
, id
, 1);
737 return min_t(int, len
, PAGE_SIZE
);
739 static DEVICE_ATTR(modalias
, S_IRUGO
, input_dev_show_modalias
, NULL
);
741 static struct attribute
*input_dev_attrs
[] = {
745 &dev_attr_modalias
.attr
,
749 static struct attribute_group input_dev_attr_group
= {
750 .attrs
= input_dev_attrs
,
753 #define INPUT_DEV_ID_ATTR(name) \
754 static ssize_t input_dev_show_id_##name(struct device *dev, \
755 struct device_attribute *attr, \
758 struct input_dev *input_dev = to_input_dev(dev); \
759 return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \
761 static DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL)
763 INPUT_DEV_ID_ATTR(bustype
);
764 INPUT_DEV_ID_ATTR(vendor
);
765 INPUT_DEV_ID_ATTR(product
);
766 INPUT_DEV_ID_ATTR(version
);
768 static struct attribute
*input_dev_id_attrs
[] = {
769 &dev_attr_bustype
.attr
,
770 &dev_attr_vendor
.attr
,
771 &dev_attr_product
.attr
,
772 &dev_attr_version
.attr
,
776 static struct attribute_group input_dev_id_attr_group
= {
778 .attrs
= input_dev_id_attrs
,
781 static int input_print_bitmap(char *buf
, int buf_size
, unsigned long *bitmap
,
787 for (i
= NBITS(max
) - 1; i
> 0; i
--)
792 len
+= snprintf(buf
+ len
, max(buf_size
- len
, 0),
793 "%lx%s", bitmap
[i
], i
> 0 ? " " : "");
796 len
+= snprintf(buf
+ len
, max(buf_size
- len
, 0), "\n");
801 #define INPUT_DEV_CAP_ATTR(ev, bm) \
802 static ssize_t input_dev_show_cap_##bm(struct device *dev, \
803 struct device_attribute *attr, \
806 struct input_dev *input_dev = to_input_dev(dev); \
807 int len = input_print_bitmap(buf, PAGE_SIZE, \
808 input_dev->bm##bit, ev##_MAX, 1); \
809 return min_t(int, len, PAGE_SIZE); \
811 static DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL)
813 INPUT_DEV_CAP_ATTR(EV
, ev
);
814 INPUT_DEV_CAP_ATTR(KEY
, key
);
815 INPUT_DEV_CAP_ATTR(REL
, rel
);
816 INPUT_DEV_CAP_ATTR(ABS
, abs
);
817 INPUT_DEV_CAP_ATTR(MSC
, msc
);
818 INPUT_DEV_CAP_ATTR(LED
, led
);
819 INPUT_DEV_CAP_ATTR(SND
, snd
);
820 INPUT_DEV_CAP_ATTR(FF
, ff
);
821 INPUT_DEV_CAP_ATTR(SW
, sw
);
823 static struct attribute
*input_dev_caps_attrs
[] = {
836 static struct attribute_group input_dev_caps_attr_group
= {
837 .name
= "capabilities",
838 .attrs
= input_dev_caps_attrs
,
841 static struct attribute_group
*input_dev_attr_groups
[] = {
842 &input_dev_attr_group
,
843 &input_dev_id_attr_group
,
844 &input_dev_caps_attr_group
,
848 static void input_dev_release(struct device
*device
)
850 struct input_dev
*dev
= to_input_dev(device
);
852 input_ff_destroy(dev
);
855 module_put(THIS_MODULE
);
859 * Input uevent interface - loading event handlers based on
862 static int input_add_uevent_bm_var(char **envp
, int num_envp
, int *cur_index
,
863 char *buffer
, int buffer_size
, int *cur_len
,
864 const char *name
, unsigned long *bitmap
, int max
)
866 if (*cur_index
>= num_envp
- 1)
869 envp
[*cur_index
] = buffer
+ *cur_len
;
871 *cur_len
+= snprintf(buffer
+ *cur_len
, max(buffer_size
- *cur_len
, 0), name
);
872 if (*cur_len
>= buffer_size
)
875 *cur_len
+= input_print_bitmap(buffer
+ *cur_len
,
876 max(buffer_size
- *cur_len
, 0),
878 if (*cur_len
> buffer_size
)
885 static int input_add_uevent_modalias_var(char **envp
, int num_envp
, int *cur_index
,
886 char *buffer
, int buffer_size
, int *cur_len
,
887 struct input_dev
*dev
)
889 if (*cur_index
>= num_envp
- 1)
892 envp
[*cur_index
] = buffer
+ *cur_len
;
894 *cur_len
+= snprintf(buffer
+ *cur_len
, max(buffer_size
- *cur_len
, 0),
896 if (*cur_len
>= buffer_size
)
899 *cur_len
+= input_print_modalias(buffer
+ *cur_len
,
900 max(buffer_size
- *cur_len
, 0),
902 if (*cur_len
> buffer_size
)
909 #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \
911 int err = add_uevent_var(envp, num_envp, &i, \
912 buffer, buffer_size, &len, \
918 #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \
920 int err = input_add_uevent_bm_var(envp, num_envp, &i, \
921 buffer, buffer_size, &len, \
927 #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \
929 int err = input_add_uevent_modalias_var(envp, \
931 buffer, buffer_size, &len, \
937 static int input_dev_uevent(struct device
*device
, char **envp
,
938 int num_envp
, char *buffer
, int buffer_size
)
940 struct input_dev
*dev
= to_input_dev(device
);
944 INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x",
945 dev
->id
.bustype
, dev
->id
.vendor
,
946 dev
->id
.product
, dev
->id
.version
);
948 INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev
->name
);
950 INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev
->phys
);
952 INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev
->uniq
);
954 INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev
->evbit
, EV_MAX
);
955 if (test_bit(EV_KEY
, dev
->evbit
))
956 INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev
->keybit
, KEY_MAX
);
957 if (test_bit(EV_REL
, dev
->evbit
))
958 INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev
->relbit
, REL_MAX
);
959 if (test_bit(EV_ABS
, dev
->evbit
))
960 INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev
->absbit
, ABS_MAX
);
961 if (test_bit(EV_MSC
, dev
->evbit
))
962 INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev
->mscbit
, MSC_MAX
);
963 if (test_bit(EV_LED
, dev
->evbit
))
964 INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev
->ledbit
, LED_MAX
);
965 if (test_bit(EV_SND
, dev
->evbit
))
966 INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev
->sndbit
, SND_MAX
);
967 if (test_bit(EV_FF
, dev
->evbit
))
968 INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev
->ffbit
, FF_MAX
);
969 if (test_bit(EV_SW
, dev
->evbit
))
970 INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev
->swbit
, SW_MAX
);
972 INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev
);
978 static struct device_type input_dev_type
= {
979 .groups
= input_dev_attr_groups
,
980 .release
= input_dev_release
,
981 .uevent
= input_dev_uevent
,
984 struct class input_class
= {
987 EXPORT_SYMBOL_GPL(input_class
);
990 * input_allocate_device - allocate memory for new input device
992 * Returns prepared struct input_dev or NULL.
994 * NOTE: Use input_free_device() to free devices that have not been
995 * registered; input_unregister_device() should be used for already
996 * registered devices.
998 struct input_dev
*input_allocate_device(void)
1000 struct input_dev
*dev
;
1002 dev
= kzalloc(sizeof(struct input_dev
), GFP_KERNEL
);
1004 dev
->dev
.type
= &input_dev_type
;
1005 dev
->dev
.class = &input_class
;
1006 device_initialize(&dev
->dev
);
1007 mutex_init(&dev
->mutex
);
1008 INIT_LIST_HEAD(&dev
->h_list
);
1009 INIT_LIST_HEAD(&dev
->node
);
1011 __module_get(THIS_MODULE
);
1016 EXPORT_SYMBOL(input_allocate_device
);
1019 * input_free_device - free memory occupied by input_dev structure
1020 * @dev: input device to free
1022 * This function should only be used if input_register_device()
1023 * was not called yet or if it failed. Once device was registered
1024 * use input_unregister_device() and memory will be freed once last
1025 * refrence to the device is dropped.
1027 * Device should be allocated by input_allocate_device().
1029 * NOTE: If there are references to the input device then memory
1030 * will not be freed until last reference is dropped.
1032 void input_free_device(struct input_dev
*dev
)
1035 input_put_device(dev
);
1037 EXPORT_SYMBOL(input_free_device
);
1040 * input_set_capability - mark device as capable of a certain event
1041 * @dev: device that is capable of emitting or accepting event
1042 * @type: type of the event (EV_KEY, EV_REL, etc...)
1045 * In addition to setting up corresponding bit in appropriate capability
1046 * bitmap the function also adjusts dev->evbit.
1048 void input_set_capability(struct input_dev
*dev
, unsigned int type
, unsigned int code
)
1052 __set_bit(code
, dev
->keybit
);
1056 __set_bit(code
, dev
->relbit
);
1060 __set_bit(code
, dev
->absbit
);
1064 __set_bit(code
, dev
->mscbit
);
1068 __set_bit(code
, dev
->swbit
);
1072 __set_bit(code
, dev
->ledbit
);
1076 __set_bit(code
, dev
->sndbit
);
1080 __set_bit(code
, dev
->ffbit
);
1085 "input_set_capability: unknown type %u (code %u)\n",
1091 __set_bit(type
, dev
->evbit
);
1093 EXPORT_SYMBOL(input_set_capability
);
1095 int input_register_device(struct input_dev
*dev
)
1097 static atomic_t input_no
= ATOMIC_INIT(0);
1098 struct input_handler
*handler
;
1102 set_bit(EV_SYN
, dev
->evbit
);
1105 * If delay and period are pre-set by the driver, then autorepeating
1106 * is handled by the driver itself and we don't do it in input.c.
1109 init_timer(&dev
->timer
);
1110 if (!dev
->rep
[REP_DELAY
] && !dev
->rep
[REP_PERIOD
]) {
1111 dev
->timer
.data
= (long) dev
;
1112 dev
->timer
.function
= input_repeat_key
;
1113 dev
->rep
[REP_DELAY
] = 250;
1114 dev
->rep
[REP_PERIOD
] = 33;
1117 if (!dev
->getkeycode
)
1118 dev
->getkeycode
= input_default_getkeycode
;
1120 if (!dev
->setkeycode
)
1121 dev
->setkeycode
= input_default_setkeycode
;
1123 list_add_tail(&dev
->node
, &input_dev_list
);
1125 snprintf(dev
->dev
.bus_id
, sizeof(dev
->dev
.bus_id
),
1126 "input%ld", (unsigned long) atomic_inc_return(&input_no
) - 1);
1129 dev
->dev
.parent
= dev
->cdev
.dev
;
1131 error
= device_add(&dev
->dev
);
1135 path
= kobject_get_path(&dev
->dev
.kobj
, GFP_KERNEL
);
1136 printk(KERN_INFO
"input: %s as %s\n",
1137 dev
->name
? dev
->name
: "Unspecified device", path
? path
: "N/A");
1140 list_for_each_entry(handler
, &input_handler_list
, node
)
1141 input_attach_handler(dev
, handler
);
1143 input_wakeup_procfs_readers();
1147 EXPORT_SYMBOL(input_register_device
);
1149 void input_unregister_device(struct input_dev
*dev
)
1151 struct input_handle
*handle
, *next
;
1154 for (code
= 0; code
<= KEY_MAX
; code
++)
1155 if (test_bit(code
, dev
->key
))
1156 input_report_key(dev
, code
, 0);
1159 del_timer_sync(&dev
->timer
);
1161 list_for_each_entry_safe(handle
, next
, &dev
->h_list
, d_node
)
1162 handle
->handler
->disconnect(handle
);
1163 WARN_ON(!list_empty(&dev
->h_list
));
1165 list_del_init(&dev
->node
);
1167 device_unregister(&dev
->dev
);
1169 input_wakeup_procfs_readers();
1171 EXPORT_SYMBOL(input_unregister_device
);
1173 int input_register_handler(struct input_handler
*handler
)
1175 struct input_dev
*dev
;
1177 INIT_LIST_HEAD(&handler
->h_list
);
1179 if (handler
->fops
!= NULL
) {
1180 if (input_table
[handler
->minor
>> 5])
1183 input_table
[handler
->minor
>> 5] = handler
;
1186 list_add_tail(&handler
->node
, &input_handler_list
);
1188 list_for_each_entry(dev
, &input_dev_list
, node
)
1189 input_attach_handler(dev
, handler
);
1191 input_wakeup_procfs_readers();
1194 EXPORT_SYMBOL(input_register_handler
);
1196 void input_unregister_handler(struct input_handler
*handler
)
1198 struct input_handle
*handle
, *next
;
1200 list_for_each_entry_safe(handle
, next
, &handler
->h_list
, h_node
)
1201 handler
->disconnect(handle
);
1202 WARN_ON(!list_empty(&handler
->h_list
));
1204 list_del_init(&handler
->node
);
1206 if (handler
->fops
!= NULL
)
1207 input_table
[handler
->minor
>> 5] = NULL
;
1209 input_wakeup_procfs_readers();
1211 EXPORT_SYMBOL(input_unregister_handler
);
1213 int input_register_handle(struct input_handle
*handle
)
1215 struct input_handler
*handler
= handle
->handler
;
1217 list_add_tail(&handle
->d_node
, &handle
->dev
->h_list
);
1218 list_add_tail(&handle
->h_node
, &handler
->h_list
);
1221 handler
->start(handle
);
1225 EXPORT_SYMBOL(input_register_handle
);
1227 void input_unregister_handle(struct input_handle
*handle
)
1229 list_del_init(&handle
->h_node
);
1230 list_del_init(&handle
->d_node
);
1232 EXPORT_SYMBOL(input_unregister_handle
);
1234 static int input_open_file(struct inode
*inode
, struct file
*file
)
1236 struct input_handler
*handler
= input_table
[iminor(inode
) >> 5];
1237 const struct file_operations
*old_fops
, *new_fops
= NULL
;
1240 /* No load-on-demand here? */
1241 if (!handler
|| !(new_fops
= fops_get(handler
->fops
)))
1245 * That's _really_ odd. Usually NULL ->open means "nothing special",
1246 * not "no device". Oh, well...
1248 if (!new_fops
->open
) {
1252 old_fops
= file
->f_op
;
1253 file
->f_op
= new_fops
;
1255 err
= new_fops
->open(inode
, file
);
1258 fops_put(file
->f_op
);
1259 file
->f_op
= fops_get(old_fops
);
1265 static const struct file_operations input_fops
= {
1266 .owner
= THIS_MODULE
,
1267 .open
= input_open_file
,
1270 static int __init
input_init(void)
1274 err
= class_register(&input_class
);
1276 printk(KERN_ERR
"input: unable to register input_dev class\n");
1280 err
= input_proc_init();
1284 err
= register_chrdev(INPUT_MAJOR
, "input", &input_fops
);
1286 printk(KERN_ERR
"input: unable to register char major %d", INPUT_MAJOR
);
1292 fail2
: input_proc_exit();
1293 fail1
: class_unregister(&input_class
);
1297 static void __exit
input_exit(void)
1300 unregister_chrdev(INPUT_MAJOR
, "input");
1301 class_unregister(&input_class
);
1304 subsys_initcall(input_init
);
1305 module_exit(input_exit
);