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/sched.h>
15 #include <linux/smp_lock.h>
16 #include <linux/input.h>
17 #include <linux/module.h>
18 #include <linux/random.h>
19 #include <linux/major.h>
20 #include <linux/proc_fs.h>
21 #include <linux/seq_file.h>
22 #include <linux/interrupt.h>
23 #include <linux/poll.h>
24 #include <linux/device.h>
25 #include <linux/mutex.h>
27 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
28 MODULE_DESCRIPTION("Input core");
29 MODULE_LICENSE("GPL");
31 #define INPUT_DEVICES 256
33 static LIST_HEAD(input_dev_list
);
34 static LIST_HEAD(input_handler_list
);
36 static struct input_handler
*input_table
[8];
38 void input_event(struct input_dev
*dev
, unsigned int type
, unsigned int code
, int value
)
40 struct input_handle
*handle
;
42 if (type
> EV_MAX
|| !test_bit(type
, dev
->evbit
))
45 add_input_randomness(type
, code
, value
);
53 dev
->event(dev
, type
, code
, value
);
66 if (code
> KEY_MAX
|| !test_bit(code
, dev
->keybit
) || !!test_bit(code
, dev
->key
) == value
)
72 change_bit(code
, dev
->key
);
74 if (test_bit(EV_REP
, dev
->evbit
) && dev
->rep
[REP_PERIOD
] && dev
->rep
[REP_DELAY
] && dev
->timer
.data
&& value
) {
75 dev
->repeat_key
= code
;
76 mod_timer(&dev
->timer
, jiffies
+ msecs_to_jiffies(dev
->rep
[REP_DELAY
]));
83 if (code
> SW_MAX
|| !test_bit(code
, dev
->swbit
) || !!test_bit(code
, dev
->sw
) == value
)
86 change_bit(code
, dev
->sw
);
92 if (code
> ABS_MAX
|| !test_bit(code
, dev
->absbit
))
95 if (dev
->absfuzz
[code
]) {
96 if ((value
> dev
->abs
[code
] - (dev
->absfuzz
[code
] >> 1)) &&
97 (value
< dev
->abs
[code
] + (dev
->absfuzz
[code
] >> 1)))
100 if ((value
> dev
->abs
[code
] - dev
->absfuzz
[code
]) &&
101 (value
< dev
->abs
[code
] + dev
->absfuzz
[code
]))
102 value
= (dev
->abs
[code
] * 3 + value
) >> 2;
104 if ((value
> dev
->abs
[code
] - (dev
->absfuzz
[code
] << 1)) &&
105 (value
< dev
->abs
[code
] + (dev
->absfuzz
[code
] << 1)))
106 value
= (dev
->abs
[code
] + value
) >> 1;
109 if (dev
->abs
[code
] == value
)
112 dev
->abs
[code
] = value
;
117 if (code
> REL_MAX
|| !test_bit(code
, dev
->relbit
) || (value
== 0))
124 if (code
> MSC_MAX
|| !test_bit(code
, dev
->mscbit
))
128 dev
->event(dev
, type
, code
, value
);
134 if (code
> LED_MAX
|| !test_bit(code
, dev
->ledbit
) || !!test_bit(code
, dev
->led
) == value
)
137 change_bit(code
, dev
->led
);
140 dev
->event(dev
, type
, code
, value
);
146 if (code
> SND_MAX
|| !test_bit(code
, dev
->sndbit
))
149 if (!!test_bit(code
, dev
->snd
) != !!value
)
150 change_bit(code
, dev
->snd
);
153 dev
->event(dev
, type
, code
, value
);
159 if (code
> REP_MAX
|| value
< 0 || dev
->rep
[code
] == value
)
162 dev
->rep
[code
] = value
;
164 dev
->event(dev
, type
, code
, value
);
170 dev
->event(dev
, type
, code
, value
);
178 dev
->grab
->handler
->event(dev
->grab
, type
, code
, value
);
180 list_for_each_entry(handle
, &dev
->h_list
, d_node
)
182 handle
->handler
->event(handle
, type
, code
, value
);
184 EXPORT_SYMBOL(input_event
);
186 static void input_repeat_key(unsigned long data
)
188 struct input_dev
*dev
= (void *) data
;
190 if (!test_bit(dev
->repeat_key
, dev
->key
))
193 input_event(dev
, EV_KEY
, dev
->repeat_key
, 2);
196 if (dev
->rep
[REP_PERIOD
])
197 mod_timer(&dev
->timer
, jiffies
+ msecs_to_jiffies(dev
->rep
[REP_PERIOD
]));
200 int input_accept_process(struct input_handle
*handle
, struct file
*file
)
202 if (handle
->dev
->accept
)
203 return handle
->dev
->accept(handle
->dev
, file
);
207 EXPORT_SYMBOL(input_accept_process
);
209 int input_grab_device(struct input_handle
*handle
)
211 if (handle
->dev
->grab
)
214 handle
->dev
->grab
= handle
;
217 EXPORT_SYMBOL(input_grab_device
);
219 void input_release_device(struct input_handle
*handle
)
221 if (handle
->dev
->grab
== handle
)
222 handle
->dev
->grab
= NULL
;
224 EXPORT_SYMBOL(input_release_device
);
226 int input_open_device(struct input_handle
*handle
)
228 struct input_dev
*dev
= handle
->dev
;
231 err
= mutex_lock_interruptible(&dev
->mutex
);
237 if (!dev
->users
++ && dev
->open
)
238 err
= dev
->open(dev
);
243 mutex_unlock(&dev
->mutex
);
247 EXPORT_SYMBOL(input_open_device
);
249 int input_flush_device(struct input_handle
* handle
, struct file
* file
)
251 if (handle
->dev
->flush
)
252 return handle
->dev
->flush(handle
->dev
, file
);
256 EXPORT_SYMBOL(input_flush_device
);
258 void input_close_device(struct input_handle
*handle
)
260 struct input_dev
*dev
= handle
->dev
;
262 input_release_device(handle
);
264 mutex_lock(&dev
->mutex
);
266 if (!--dev
->users
&& dev
->close
)
270 mutex_unlock(&dev
->mutex
);
272 EXPORT_SYMBOL(input_close_device
);
274 static void input_link_handle(struct input_handle
*handle
)
276 list_add_tail(&handle
->d_node
, &handle
->dev
->h_list
);
277 list_add_tail(&handle
->h_node
, &handle
->handler
->h_list
);
280 #define MATCH_BIT(bit, max) \
281 for (i = 0; i < NBITS(max); i++) \
282 if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
284 if (i != NBITS(max)) \
287 static struct input_device_id
*input_match_device(struct input_device_id
*id
, struct input_dev
*dev
)
291 for (; id
->flags
|| id
->driver_info
; id
++) {
293 if (id
->flags
& INPUT_DEVICE_ID_MATCH_BUS
)
294 if (id
->bustype
!= dev
->id
.bustype
)
297 if (id
->flags
& INPUT_DEVICE_ID_MATCH_VENDOR
)
298 if (id
->vendor
!= dev
->id
.vendor
)
301 if (id
->flags
& INPUT_DEVICE_ID_MATCH_PRODUCT
)
302 if (id
->product
!= dev
->id
.product
)
305 if (id
->flags
& INPUT_DEVICE_ID_MATCH_VERSION
)
306 if (id
->version
!= dev
->id
.version
)
309 MATCH_BIT(evbit
, EV_MAX
);
310 MATCH_BIT(keybit
, KEY_MAX
);
311 MATCH_BIT(relbit
, REL_MAX
);
312 MATCH_BIT(absbit
, ABS_MAX
);
313 MATCH_BIT(mscbit
, MSC_MAX
);
314 MATCH_BIT(ledbit
, LED_MAX
);
315 MATCH_BIT(sndbit
, SND_MAX
);
316 MATCH_BIT(ffbit
, FF_MAX
);
317 MATCH_BIT(swbit
, SW_MAX
);
325 #ifdef CONFIG_PROC_FS
327 static struct proc_dir_entry
*proc_bus_input_dir
;
328 static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait
);
329 static int input_devices_state
;
331 static inline void input_wakeup_procfs_readers(void)
333 input_devices_state
++;
334 wake_up(&input_devices_poll_wait
);
337 static unsigned int input_proc_devices_poll(struct file
*file
, poll_table
*wait
)
339 int state
= input_devices_state
;
341 poll_wait(file
, &input_devices_poll_wait
, wait
);
342 if (state
!= input_devices_state
)
343 return POLLIN
| POLLRDNORM
;
348 static struct list_head
*list_get_nth_element(struct list_head
*list
, loff_t
*pos
)
350 struct list_head
*node
;
353 list_for_each(node
, list
)
360 static struct list_head
*list_get_next_element(struct list_head
*list
, struct list_head
*element
, loff_t
*pos
)
362 if (element
->next
== list
)
366 return element
->next
;
369 static void *input_devices_seq_start(struct seq_file
*seq
, loff_t
*pos
)
371 /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
373 return list_get_nth_element(&input_dev_list
, pos
);
376 static void *input_devices_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
378 return list_get_next_element(&input_dev_list
, v
, pos
);
381 static void input_devices_seq_stop(struct seq_file
*seq
, void *v
)
383 /* release lock here */
386 static void input_seq_print_bitmap(struct seq_file
*seq
, const char *name
,
387 unsigned long *bitmap
, int max
)
391 for (i
= NBITS(max
) - 1; i
> 0; i
--)
395 seq_printf(seq
, "B: %s=", name
);
397 seq_printf(seq
, "%lx%s", bitmap
[i
], i
> 0 ? " " : "");
401 static int input_devices_seq_show(struct seq_file
*seq
, void *v
)
403 struct input_dev
*dev
= container_of(v
, struct input_dev
, node
);
404 const char *path
= kobject_get_path(&dev
->cdev
.kobj
, GFP_KERNEL
);
405 struct input_handle
*handle
;
407 seq_printf(seq
, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
408 dev
->id
.bustype
, dev
->id
.vendor
, dev
->id
.product
, dev
->id
.version
);
410 seq_printf(seq
, "N: Name=\"%s\"\n", dev
->name
? dev
->name
: "");
411 seq_printf(seq
, "P: Phys=%s\n", dev
->phys
? dev
->phys
: "");
412 seq_printf(seq
, "S: Sysfs=%s\n", path
? path
: "");
413 seq_printf(seq
, "H: Handlers=");
415 list_for_each_entry(handle
, &dev
->h_list
, d_node
)
416 seq_printf(seq
, "%s ", handle
->name
);
419 input_seq_print_bitmap(seq
, "EV", dev
->evbit
, EV_MAX
);
420 if (test_bit(EV_KEY
, dev
->evbit
))
421 input_seq_print_bitmap(seq
, "KEY", dev
->keybit
, KEY_MAX
);
422 if (test_bit(EV_REL
, dev
->evbit
))
423 input_seq_print_bitmap(seq
, "REL", dev
->relbit
, REL_MAX
);
424 if (test_bit(EV_ABS
, dev
->evbit
))
425 input_seq_print_bitmap(seq
, "ABS", dev
->absbit
, ABS_MAX
);
426 if (test_bit(EV_MSC
, dev
->evbit
))
427 input_seq_print_bitmap(seq
, "MSC", dev
->mscbit
, MSC_MAX
);
428 if (test_bit(EV_LED
, dev
->evbit
))
429 input_seq_print_bitmap(seq
, "LED", dev
->ledbit
, LED_MAX
);
430 if (test_bit(EV_SND
, dev
->evbit
))
431 input_seq_print_bitmap(seq
, "SND", dev
->sndbit
, SND_MAX
);
432 if (test_bit(EV_FF
, dev
->evbit
))
433 input_seq_print_bitmap(seq
, "FF", dev
->ffbit
, FF_MAX
);
434 if (test_bit(EV_SW
, dev
->evbit
))
435 input_seq_print_bitmap(seq
, "SW", dev
->swbit
, SW_MAX
);
443 static struct seq_operations input_devices_seq_ops
= {
444 .start
= input_devices_seq_start
,
445 .next
= input_devices_seq_next
,
446 .stop
= input_devices_seq_stop
,
447 .show
= input_devices_seq_show
,
450 static int input_proc_devices_open(struct inode
*inode
, struct file
*file
)
452 return seq_open(file
, &input_devices_seq_ops
);
455 static struct file_operations input_devices_fileops
= {
456 .owner
= THIS_MODULE
,
457 .open
= input_proc_devices_open
,
458 .poll
= input_proc_devices_poll
,
461 .release
= seq_release
,
464 static void *input_handlers_seq_start(struct seq_file
*seq
, loff_t
*pos
)
466 /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
467 seq
->private = (void *)(unsigned long)*pos
;
468 return list_get_nth_element(&input_handler_list
, pos
);
471 static void *input_handlers_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
473 seq
->private = (void *)(unsigned long)(*pos
+ 1);
474 return list_get_next_element(&input_handler_list
, v
, pos
);
477 static void input_handlers_seq_stop(struct seq_file
*seq
, void *v
)
479 /* release lock here */
482 static int input_handlers_seq_show(struct seq_file
*seq
, void *v
)
484 struct input_handler
*handler
= container_of(v
, struct input_handler
, node
);
486 seq_printf(seq
, "N: Number=%ld Name=%s",
487 (unsigned long)seq
->private, handler
->name
);
489 seq_printf(seq
, " Minor=%d", handler
->minor
);
494 static struct seq_operations input_handlers_seq_ops
= {
495 .start
= input_handlers_seq_start
,
496 .next
= input_handlers_seq_next
,
497 .stop
= input_handlers_seq_stop
,
498 .show
= input_handlers_seq_show
,
501 static int input_proc_handlers_open(struct inode
*inode
, struct file
*file
)
503 return seq_open(file
, &input_handlers_seq_ops
);
506 static struct file_operations input_handlers_fileops
= {
507 .owner
= THIS_MODULE
,
508 .open
= input_proc_handlers_open
,
511 .release
= seq_release
,
514 static int __init
input_proc_init(void)
516 struct proc_dir_entry
*entry
;
518 proc_bus_input_dir
= proc_mkdir("input", proc_bus
);
519 if (!proc_bus_input_dir
)
522 proc_bus_input_dir
->owner
= THIS_MODULE
;
524 entry
= create_proc_entry("devices", 0, proc_bus_input_dir
);
528 entry
->owner
= THIS_MODULE
;
529 entry
->proc_fops
= &input_devices_fileops
;
531 entry
= create_proc_entry("handlers", 0, proc_bus_input_dir
);
535 entry
->owner
= THIS_MODULE
;
536 entry
->proc_fops
= &input_handlers_fileops
;
540 fail2
: remove_proc_entry("devices", proc_bus_input_dir
);
541 fail1
: remove_proc_entry("input", proc_bus
);
545 static void input_proc_exit(void)
547 remove_proc_entry("devices", proc_bus_input_dir
);
548 remove_proc_entry("handlers", proc_bus_input_dir
);
549 remove_proc_entry("input", proc_bus
);
552 #else /* !CONFIG_PROC_FS */
553 static inline void input_wakeup_procfs_readers(void) { }
554 static inline int input_proc_init(void) { return 0; }
555 static inline void input_proc_exit(void) { }
558 #define INPUT_DEV_STRING_ATTR_SHOW(name) \
559 static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \
561 struct input_dev *input_dev = to_input_dev(dev); \
564 retval = mutex_lock_interruptible(&input_dev->mutex); \
568 retval = scnprintf(buf, PAGE_SIZE, \
569 "%s\n", input_dev->name ? input_dev->name : ""); \
571 mutex_unlock(&input_dev->mutex); \
575 static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL);
577 INPUT_DEV_STRING_ATTR_SHOW(name
);
578 INPUT_DEV_STRING_ATTR_SHOW(phys
);
579 INPUT_DEV_STRING_ATTR_SHOW(uniq
);
581 static int input_print_modalias_bits(char *buf
, int size
,
582 char name
, unsigned long *bm
,
583 unsigned int min_bit
, unsigned int max_bit
)
587 len
+= snprintf(buf
, max(size
, 0), "%c", name
);
588 for (i
= min_bit
; i
< max_bit
; i
++)
589 if (bm
[LONG(i
)] & BIT(i
))
590 len
+= snprintf(buf
+ len
, max(size
- len
, 0), "%X,", i
);
594 static int input_print_modalias(char *buf
, int size
, struct input_dev
*id
,
599 len
= snprintf(buf
, max(size
, 0),
600 "input:b%04Xv%04Xp%04Xe%04X-",
601 id
->id
.bustype
, id
->id
.vendor
,
602 id
->id
.product
, id
->id
.version
);
604 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
605 'e', id
->evbit
, 0, EV_MAX
);
606 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
607 'k', id
->keybit
, KEY_MIN_INTERESTING
, KEY_MAX
);
608 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
609 'r', id
->relbit
, 0, REL_MAX
);
610 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
611 'a', id
->absbit
, 0, ABS_MAX
);
612 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
613 'm', id
->mscbit
, 0, MSC_MAX
);
614 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
615 'l', id
->ledbit
, 0, LED_MAX
);
616 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
617 's', id
->sndbit
, 0, SND_MAX
);
618 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
619 'f', id
->ffbit
, 0, FF_MAX
);
620 len
+= input_print_modalias_bits(buf
+ len
, size
- len
,
621 'w', id
->swbit
, 0, SW_MAX
);
624 len
+= snprintf(buf
+ len
, max(size
- len
, 0), "\n");
629 static ssize_t
input_dev_show_modalias(struct class_device
*dev
, char *buf
)
631 struct input_dev
*id
= to_input_dev(dev
);
634 len
= input_print_modalias(buf
, PAGE_SIZE
, id
, 1);
636 return min_t(int, len
, PAGE_SIZE
);
638 static CLASS_DEVICE_ATTR(modalias
, S_IRUGO
, input_dev_show_modalias
, NULL
);
640 static struct attribute
*input_dev_attrs
[] = {
641 &class_device_attr_name
.attr
,
642 &class_device_attr_phys
.attr
,
643 &class_device_attr_uniq
.attr
,
644 &class_device_attr_modalias
.attr
,
648 static struct attribute_group input_dev_attr_group
= {
649 .attrs
= input_dev_attrs
,
652 #define INPUT_DEV_ID_ATTR(name) \
653 static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \
655 struct input_dev *input_dev = to_input_dev(dev); \
656 return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \
658 static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL);
660 INPUT_DEV_ID_ATTR(bustype
);
661 INPUT_DEV_ID_ATTR(vendor
);
662 INPUT_DEV_ID_ATTR(product
);
663 INPUT_DEV_ID_ATTR(version
);
665 static struct attribute
*input_dev_id_attrs
[] = {
666 &class_device_attr_bustype
.attr
,
667 &class_device_attr_vendor
.attr
,
668 &class_device_attr_product
.attr
,
669 &class_device_attr_version
.attr
,
673 static struct attribute_group input_dev_id_attr_group
= {
675 .attrs
= input_dev_id_attrs
,
678 static int input_print_bitmap(char *buf
, int buf_size
, unsigned long *bitmap
,
684 for (i
= NBITS(max
) - 1; i
> 0; i
--)
689 len
+= snprintf(buf
+ len
, max(buf_size
- len
, 0),
690 "%lx%s", bitmap
[i
], i
> 0 ? " " : "");
693 len
+= snprintf(buf
+ len
, max(buf_size
- len
, 0), "\n");
698 #define INPUT_DEV_CAP_ATTR(ev, bm) \
699 static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \
701 struct input_dev *input_dev = to_input_dev(dev); \
702 int len = input_print_bitmap(buf, PAGE_SIZE, \
703 input_dev->bm##bit, ev##_MAX, 1); \
704 return min_t(int, len, PAGE_SIZE); \
706 static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL);
708 INPUT_DEV_CAP_ATTR(EV
, ev
);
709 INPUT_DEV_CAP_ATTR(KEY
, key
);
710 INPUT_DEV_CAP_ATTR(REL
, rel
);
711 INPUT_DEV_CAP_ATTR(ABS
, abs
);
712 INPUT_DEV_CAP_ATTR(MSC
, msc
);
713 INPUT_DEV_CAP_ATTR(LED
, led
);
714 INPUT_DEV_CAP_ATTR(SND
, snd
);
715 INPUT_DEV_CAP_ATTR(FF
, ff
);
716 INPUT_DEV_CAP_ATTR(SW
, sw
);
718 static struct attribute
*input_dev_caps_attrs
[] = {
719 &class_device_attr_ev
.attr
,
720 &class_device_attr_key
.attr
,
721 &class_device_attr_rel
.attr
,
722 &class_device_attr_abs
.attr
,
723 &class_device_attr_msc
.attr
,
724 &class_device_attr_led
.attr
,
725 &class_device_attr_snd
.attr
,
726 &class_device_attr_ff
.attr
,
727 &class_device_attr_sw
.attr
,
731 static struct attribute_group input_dev_caps_attr_group
= {
732 .name
= "capabilities",
733 .attrs
= input_dev_caps_attrs
,
736 static void input_dev_release(struct class_device
*class_dev
)
738 struct input_dev
*dev
= to_input_dev(class_dev
);
741 module_put(THIS_MODULE
);
745 * Input uevent interface - loading event handlers based on
748 static int input_add_uevent_bm_var(char **envp
, int num_envp
, int *cur_index
,
749 char *buffer
, int buffer_size
, int *cur_len
,
750 const char *name
, unsigned long *bitmap
, int max
)
752 if (*cur_index
>= num_envp
- 1)
755 envp
[*cur_index
] = buffer
+ *cur_len
;
757 *cur_len
+= snprintf(buffer
+ *cur_len
, max(buffer_size
- *cur_len
, 0), name
);
758 if (*cur_len
>= buffer_size
)
761 *cur_len
+= input_print_bitmap(buffer
+ *cur_len
,
762 max(buffer_size
- *cur_len
, 0),
764 if (*cur_len
> buffer_size
)
771 static int input_add_uevent_modalias_var(char **envp
, int num_envp
, int *cur_index
,
772 char *buffer
, int buffer_size
, int *cur_len
,
773 struct input_dev
*dev
)
775 if (*cur_index
>= num_envp
- 1)
778 envp
[*cur_index
] = buffer
+ *cur_len
;
780 *cur_len
+= snprintf(buffer
+ *cur_len
, max(buffer_size
- *cur_len
, 0),
782 if (*cur_len
>= buffer_size
)
785 *cur_len
+= input_print_modalias(buffer
+ *cur_len
,
786 max(buffer_size
- *cur_len
, 0),
788 if (*cur_len
> buffer_size
)
795 #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \
797 int err = add_uevent_var(envp, num_envp, &i, \
798 buffer, buffer_size, &len, \
804 #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \
806 int err = input_add_uevent_bm_var(envp, num_envp, &i, \
807 buffer, buffer_size, &len, \
813 #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \
815 int err = input_add_uevent_modalias_var(envp, \
817 buffer, buffer_size, &len, \
823 static int input_dev_uevent(struct class_device
*cdev
, char **envp
,
824 int num_envp
, char *buffer
, int buffer_size
)
826 struct input_dev
*dev
= to_input_dev(cdev
);
830 INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x",
831 dev
->id
.bustype
, dev
->id
.vendor
,
832 dev
->id
.product
, dev
->id
.version
);
834 INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev
->name
);
836 INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev
->phys
);
838 INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev
->uniq
);
840 INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev
->evbit
, EV_MAX
);
841 if (test_bit(EV_KEY
, dev
->evbit
))
842 INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev
->keybit
, KEY_MAX
);
843 if (test_bit(EV_REL
, dev
->evbit
))
844 INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev
->relbit
, REL_MAX
);
845 if (test_bit(EV_ABS
, dev
->evbit
))
846 INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev
->absbit
, ABS_MAX
);
847 if (test_bit(EV_MSC
, dev
->evbit
))
848 INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev
->mscbit
, MSC_MAX
);
849 if (test_bit(EV_LED
, dev
->evbit
))
850 INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev
->ledbit
, LED_MAX
);
851 if (test_bit(EV_SND
, dev
->evbit
))
852 INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev
->sndbit
, SND_MAX
);
853 if (test_bit(EV_FF
, dev
->evbit
))
854 INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev
->ffbit
, FF_MAX
);
855 if (test_bit(EV_SW
, dev
->evbit
))
856 INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev
->swbit
, SW_MAX
);
858 INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev
);
864 struct class input_class
= {
866 .release
= input_dev_release
,
867 .uevent
= input_dev_uevent
,
869 EXPORT_SYMBOL_GPL(input_class
);
871 struct input_dev
*input_allocate_device(void)
873 struct input_dev
*dev
;
875 dev
= kzalloc(sizeof(struct input_dev
), GFP_KERNEL
);
878 dev
->cdev
.class = &input_class
;
879 class_device_initialize(&dev
->cdev
);
880 mutex_init(&dev
->mutex
);
881 INIT_LIST_HEAD(&dev
->h_list
);
882 INIT_LIST_HEAD(&dev
->node
);
887 EXPORT_SYMBOL(input_allocate_device
);
889 void input_free_device(struct input_dev
*dev
)
893 mutex_lock(&dev
->mutex
);
894 dev
->name
= dev
->phys
= dev
->uniq
= NULL
;
895 mutex_unlock(&dev
->mutex
);
897 input_put_device(dev
);
900 EXPORT_SYMBOL(input_free_device
);
902 int input_register_device(struct input_dev
*dev
)
904 static atomic_t input_no
= ATOMIC_INIT(0);
905 struct input_handle
*handle
;
906 struct input_handler
*handler
;
907 struct input_device_id
*id
;
911 if (!dev
->dynalloc
) {
912 printk(KERN_WARNING
"input: device %s is statically allocated, will not register\n"
913 "Please convert to input_allocate_device() or contact dtor_core@ameritech.net\n",
914 dev
->name
? dev
->name
: "<Unknown>");
918 set_bit(EV_SYN
, dev
->evbit
);
921 * If delay and period are pre-set by the driver, then autorepeating
922 * is handled by the driver itself and we don't do it in input.c.
925 init_timer(&dev
->timer
);
926 if (!dev
->rep
[REP_DELAY
] && !dev
->rep
[REP_PERIOD
]) {
927 dev
->timer
.data
= (long) dev
;
928 dev
->timer
.function
= input_repeat_key
;
929 dev
->rep
[REP_DELAY
] = 250;
930 dev
->rep
[REP_PERIOD
] = 33;
933 INIT_LIST_HEAD(&dev
->h_list
);
934 list_add_tail(&dev
->node
, &input_dev_list
);
936 dev
->cdev
.class = &input_class
;
937 snprintf(dev
->cdev
.class_id
, sizeof(dev
->cdev
.class_id
),
938 "input%ld", (unsigned long) atomic_inc_return(&input_no
) - 1);
940 error
= class_device_add(&dev
->cdev
);
944 error
= sysfs_create_group(&dev
->cdev
.kobj
, &input_dev_attr_group
);
948 error
= sysfs_create_group(&dev
->cdev
.kobj
, &input_dev_id_attr_group
);
952 error
= sysfs_create_group(&dev
->cdev
.kobj
, &input_dev_caps_attr_group
);
956 __module_get(THIS_MODULE
);
958 path
= kobject_get_path(&dev
->cdev
.kobj
, GFP_KERNEL
);
959 printk(KERN_INFO
"input: %s as %s\n",
960 dev
->name
? dev
->name
: "Unspecified device", path
? path
: "N/A");
963 list_for_each_entry(handler
, &input_handler_list
, node
)
964 if (!handler
->blacklist
|| !input_match_device(handler
->blacklist
, dev
))
965 if ((id
= input_match_device(handler
->id_table
, dev
)))
966 if ((handle
= handler
->connect(handler
, dev
, id
)))
967 input_link_handle(handle
);
969 input_wakeup_procfs_readers();
973 fail3
: sysfs_remove_group(&dev
->cdev
.kobj
, &input_dev_id_attr_group
);
974 fail2
: sysfs_remove_group(&dev
->cdev
.kobj
, &input_dev_attr_group
);
975 fail1
: class_device_del(&dev
->cdev
);
978 EXPORT_SYMBOL(input_register_device
);
980 void input_unregister_device(struct input_dev
*dev
)
982 struct list_head
*node
, *next
;
987 del_timer_sync(&dev
->timer
);
989 list_for_each_safe(node
, next
, &dev
->h_list
) {
990 struct input_handle
* handle
= to_handle(node
);
991 list_del_init(&handle
->d_node
);
992 list_del_init(&handle
->h_node
);
993 handle
->handler
->disconnect(handle
);
996 list_del_init(&dev
->node
);
998 sysfs_remove_group(&dev
->cdev
.kobj
, &input_dev_caps_attr_group
);
999 sysfs_remove_group(&dev
->cdev
.kobj
, &input_dev_id_attr_group
);
1000 sysfs_remove_group(&dev
->cdev
.kobj
, &input_dev_attr_group
);
1002 mutex_lock(&dev
->mutex
);
1003 dev
->name
= dev
->phys
= dev
->uniq
= NULL
;
1004 mutex_unlock(&dev
->mutex
);
1006 class_device_unregister(&dev
->cdev
);
1008 input_wakeup_procfs_readers();
1010 EXPORT_SYMBOL(input_unregister_device
);
1012 void input_register_handler(struct input_handler
*handler
)
1014 struct input_dev
*dev
;
1015 struct input_handle
*handle
;
1016 struct input_device_id
*id
;
1021 INIT_LIST_HEAD(&handler
->h_list
);
1023 if (handler
->fops
!= NULL
)
1024 input_table
[handler
->minor
>> 5] = handler
;
1026 list_add_tail(&handler
->node
, &input_handler_list
);
1028 list_for_each_entry(dev
, &input_dev_list
, node
)
1029 if (!handler
->blacklist
|| !input_match_device(handler
->blacklist
, dev
))
1030 if ((id
= input_match_device(handler
->id_table
, dev
)))
1031 if ((handle
= handler
->connect(handler
, dev
, id
)))
1032 input_link_handle(handle
);
1034 input_wakeup_procfs_readers();
1036 EXPORT_SYMBOL(input_register_handler
);
1038 void input_unregister_handler(struct input_handler
*handler
)
1040 struct list_head
*node
, *next
;
1042 list_for_each_safe(node
, next
, &handler
->h_list
) {
1043 struct input_handle
* handle
= to_handle_h(node
);
1044 list_del_init(&handle
->h_node
);
1045 list_del_init(&handle
->d_node
);
1046 handler
->disconnect(handle
);
1049 list_del_init(&handler
->node
);
1051 if (handler
->fops
!= NULL
)
1052 input_table
[handler
->minor
>> 5] = NULL
;
1054 input_wakeup_procfs_readers();
1056 EXPORT_SYMBOL(input_unregister_handler
);
1058 static int input_open_file(struct inode
*inode
, struct file
*file
)
1060 struct input_handler
*handler
= input_table
[iminor(inode
) >> 5];
1061 const struct file_operations
*old_fops
, *new_fops
= NULL
;
1064 /* No load-on-demand here? */
1065 if (!handler
|| !(new_fops
= fops_get(handler
->fops
)))
1069 * That's _really_ odd. Usually NULL ->open means "nothing special",
1070 * not "no device". Oh, well...
1072 if (!new_fops
->open
) {
1076 old_fops
= file
->f_op
;
1077 file
->f_op
= new_fops
;
1079 err
= new_fops
->open(inode
, file
);
1082 fops_put(file
->f_op
);
1083 file
->f_op
= fops_get(old_fops
);
1089 static struct file_operations input_fops
= {
1090 .owner
= THIS_MODULE
,
1091 .open
= input_open_file
,
1094 static int __init
input_init(void)
1098 err
= class_register(&input_class
);
1100 printk(KERN_ERR
"input: unable to register input_dev class\n");
1104 err
= input_proc_init();
1108 err
= register_chrdev(INPUT_MAJOR
, "input", &input_fops
);
1110 printk(KERN_ERR
"input: unable to register char major %d", INPUT_MAJOR
);
1116 fail2
: input_proc_exit();
1117 fail1
: class_unregister(&input_class
);
1121 static void __exit
input_exit(void)
1124 unregister_chrdev(INPUT_MAJOR
, "input");
1125 class_unregister(&input_class
);
1128 subsys_initcall(input_init
);
1129 module_exit(input_exit
);