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_grab_device(struct input_handle *handle)
202 if (handle->dev->grab)
205 handle->dev->grab = handle;
208 EXPORT_SYMBOL(input_grab_device);
210 void input_release_device(struct input_handle *handle)
212 if (handle->dev->grab == handle) {
213 handle->dev->grab = NULL;
215 list_for_each_entry(handle, &handle->dev->h_list, d_node)
216 if (handle->handler->start)
217 handle->handler->start(handle);
220 EXPORT_SYMBOL(input_release_device);
222 int input_open_device(struct input_handle *handle)
224 struct input_dev *dev = handle->dev;
227 err = mutex_lock_interruptible(&dev->mutex);
233 if (!dev->users++ && dev->open)
234 err = dev->open(dev);
239 mutex_unlock(&dev->mutex);
243 EXPORT_SYMBOL(input_open_device);
245 int input_flush_device(struct input_handle* handle, struct file* file)
247 if (handle->dev->flush)
248 return handle->dev->flush(handle->dev, file);
252 EXPORT_SYMBOL(input_flush_device);
254 void input_close_device(struct input_handle *handle)
256 struct input_dev *dev = handle->dev;
258 input_release_device(handle);
260 mutex_lock(&dev->mutex);
262 if (!--dev->users && dev->close)
266 mutex_unlock(&dev->mutex);
268 EXPORT_SYMBOL(input_close_device);
270 static void input_link_handle(struct input_handle *handle)
272 list_add_tail(&handle->d_node, &handle->dev->h_list);
273 list_add_tail(&handle->h_node, &handle->handler->h_list);
276 #define MATCH_BIT(bit, max) \
277 for (i = 0; i < NBITS(max); i++) \
278 if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
280 if (i != NBITS(max)) \
283 static struct input_device_id *input_match_device(struct input_device_id *id, struct input_dev *dev)
287 for (; id->flags || id->driver_info; id++) {
289 if (id->flags & INPUT_DEVICE_ID_MATCH_BUS)
290 if (id->bustype != dev->id.bustype)
293 if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR)
294 if (id->vendor != dev->id.vendor)
297 if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT)
298 if (id->product != dev->id.product)
301 if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION)
302 if (id->version != dev->id.version)
305 MATCH_BIT(evbit, EV_MAX);
306 MATCH_BIT(keybit, KEY_MAX);
307 MATCH_BIT(relbit, REL_MAX);
308 MATCH_BIT(absbit, ABS_MAX);
309 MATCH_BIT(mscbit, MSC_MAX);
310 MATCH_BIT(ledbit, LED_MAX);
311 MATCH_BIT(sndbit, SND_MAX);
312 MATCH_BIT(ffbit, FF_MAX);
313 MATCH_BIT(swbit, SW_MAX);
321 #ifdef CONFIG_PROC_FS
323 static struct proc_dir_entry *proc_bus_input_dir;
324 static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait);
325 static int input_devices_state;
327 static inline void input_wakeup_procfs_readers(void)
329 input_devices_state++;
330 wake_up(&input_devices_poll_wait);
333 static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait)
335 int state = input_devices_state;
337 poll_wait(file, &input_devices_poll_wait, wait);
338 if (state != input_devices_state)
339 return POLLIN | POLLRDNORM;
344 static struct list_head *list_get_nth_element(struct list_head *list, loff_t *pos)
346 struct list_head *node;
349 list_for_each(node, list)
356 static struct list_head *list_get_next_element(struct list_head *list, struct list_head *element, loff_t *pos)
358 if (element->next == list)
362 return element->next;
365 static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos)
367 /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
369 return list_get_nth_element(&input_dev_list, pos);
372 static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos)
374 return list_get_next_element(&input_dev_list, v, pos);
377 static void input_devices_seq_stop(struct seq_file *seq, void *v)
379 /* release lock here */
382 static void input_seq_print_bitmap(struct seq_file *seq, const char *name,
383 unsigned long *bitmap, int max)
387 for (i = NBITS(max) - 1; i > 0; i--)
391 seq_printf(seq, "B: %s=", name);
393 seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : "");
397 static int input_devices_seq_show(struct seq_file *seq, void *v)
399 struct input_dev *dev = container_of(v, struct input_dev, node);
400 const char *path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
401 struct input_handle *handle;
403 seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
404 dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
406 seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
407 seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : "");
408 seq_printf(seq, "S: Sysfs=%s\n", path ? path : "");
409 seq_printf(seq, "H: Handlers=");
411 list_for_each_entry(handle, &dev->h_list, d_node)
412 seq_printf(seq, "%s ", handle->name);
415 input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX);
416 if (test_bit(EV_KEY, dev->evbit))
417 input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX);
418 if (test_bit(EV_REL, dev->evbit))
419 input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX);
420 if (test_bit(EV_ABS, dev->evbit))
421 input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX);
422 if (test_bit(EV_MSC, dev->evbit))
423 input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX);
424 if (test_bit(EV_LED, dev->evbit))
425 input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX);
426 if (test_bit(EV_SND, dev->evbit))
427 input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX);
428 if (test_bit(EV_FF, dev->evbit))
429 input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX);
430 if (test_bit(EV_SW, dev->evbit))
431 input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX);
439 static struct seq_operations input_devices_seq_ops = {
440 .start = input_devices_seq_start,
441 .next = input_devices_seq_next,
442 .stop = input_devices_seq_stop,
443 .show = input_devices_seq_show,
446 static int input_proc_devices_open(struct inode *inode, struct file *file)
448 return seq_open(file, &input_devices_seq_ops);
451 static struct file_operations input_devices_fileops = {
452 .owner = THIS_MODULE,
453 .open = input_proc_devices_open,
454 .poll = input_proc_devices_poll,
457 .release = seq_release,
460 static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos)
462 /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
463 seq->private = (void *)(unsigned long)*pos;
464 return list_get_nth_element(&input_handler_list, pos);
467 static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos)
469 seq->private = (void *)(unsigned long)(*pos + 1);
470 return list_get_next_element(&input_handler_list, v, pos);
473 static void input_handlers_seq_stop(struct seq_file *seq, void *v)
475 /* release lock here */
478 static int input_handlers_seq_show(struct seq_file *seq, void *v)
480 struct input_handler *handler = container_of(v, struct input_handler, node);
482 seq_printf(seq, "N: Number=%ld Name=%s",
483 (unsigned long)seq->private, handler->name);
485 seq_printf(seq, " Minor=%d", handler->minor);
490 static struct seq_operations input_handlers_seq_ops = {
491 .start = input_handlers_seq_start,
492 .next = input_handlers_seq_next,
493 .stop = input_handlers_seq_stop,
494 .show = input_handlers_seq_show,
497 static int input_proc_handlers_open(struct inode *inode, struct file *file)
499 return seq_open(file, &input_handlers_seq_ops);
502 static struct file_operations input_handlers_fileops = {
503 .owner = THIS_MODULE,
504 .open = input_proc_handlers_open,
507 .release = seq_release,
510 static int __init input_proc_init(void)
512 struct proc_dir_entry *entry;
514 proc_bus_input_dir = proc_mkdir("input", proc_bus);
515 if (!proc_bus_input_dir)
518 proc_bus_input_dir->owner = THIS_MODULE;
520 entry = create_proc_entry("devices", 0, proc_bus_input_dir);
524 entry->owner = THIS_MODULE;
525 entry->proc_fops = &input_devices_fileops;
527 entry = create_proc_entry("handlers", 0, proc_bus_input_dir);
531 entry->owner = THIS_MODULE;
532 entry->proc_fops = &input_handlers_fileops;
536 fail2: remove_proc_entry("devices", proc_bus_input_dir);
537 fail1: remove_proc_entry("input", proc_bus);
541 static void input_proc_exit(void)
543 remove_proc_entry("devices", proc_bus_input_dir);
544 remove_proc_entry("handlers", proc_bus_input_dir);
545 remove_proc_entry("input", proc_bus);
548 #else /* !CONFIG_PROC_FS */
549 static inline void input_wakeup_procfs_readers(void) { }
550 static inline int input_proc_init(void) { return 0; }
551 static inline void input_proc_exit(void) { }
554 #define INPUT_DEV_STRING_ATTR_SHOW(name) \
555 static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \
557 struct input_dev *input_dev = to_input_dev(dev); \
560 retval = mutex_lock_interruptible(&input_dev->mutex); \
564 retval = scnprintf(buf, PAGE_SIZE, \
565 "%s\n", input_dev->name ? input_dev->name : ""); \
567 mutex_unlock(&input_dev->mutex); \
571 static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL);
573 INPUT_DEV_STRING_ATTR_SHOW(name);
574 INPUT_DEV_STRING_ATTR_SHOW(phys);
575 INPUT_DEV_STRING_ATTR_SHOW(uniq);
577 static int input_print_modalias_bits(char *buf, int size,
578 char name, unsigned long *bm,
579 unsigned int min_bit, unsigned int max_bit)
583 len += snprintf(buf, max(size, 0), "%c", name);
584 for (i = min_bit; i < max_bit; i++)
585 if (bm[LONG(i)] & BIT(i))
586 len += snprintf(buf + len, max(size - len, 0), "%X,", i);
590 static int input_print_modalias(char *buf, int size, struct input_dev *id,
595 len = snprintf(buf, max(size, 0),
596 "input:b%04Xv%04Xp%04Xe%04X-",
597 id->id.bustype, id->id.vendor,
598 id->id.product, id->id.version);
600 len += input_print_modalias_bits(buf + len, size - len,
601 'e', id->evbit, 0, EV_MAX);
602 len += input_print_modalias_bits(buf + len, size - len,
603 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX);
604 len += input_print_modalias_bits(buf + len, size - len,
605 'r', id->relbit, 0, REL_MAX);
606 len += input_print_modalias_bits(buf + len, size - len,
607 'a', id->absbit, 0, ABS_MAX);
608 len += input_print_modalias_bits(buf + len, size - len,
609 'm', id->mscbit, 0, MSC_MAX);
610 len += input_print_modalias_bits(buf + len, size - len,
611 'l', id->ledbit, 0, LED_MAX);
612 len += input_print_modalias_bits(buf + len, size - len,
613 's', id->sndbit, 0, SND_MAX);
614 len += input_print_modalias_bits(buf + len, size - len,
615 'f', id->ffbit, 0, FF_MAX);
616 len += input_print_modalias_bits(buf + len, size - len,
617 'w', id->swbit, 0, SW_MAX);
620 len += snprintf(buf + len, max(size - len, 0), "\n");
625 static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf)
627 struct input_dev *id = to_input_dev(dev);
630 len = input_print_modalias(buf, PAGE_SIZE, id, 1);
632 return min_t(int, len, PAGE_SIZE);
634 static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL);
636 static struct attribute *input_dev_attrs[] = {
637 &class_device_attr_name.attr,
638 &class_device_attr_phys.attr,
639 &class_device_attr_uniq.attr,
640 &class_device_attr_modalias.attr,
644 static struct attribute_group input_dev_attr_group = {
645 .attrs = input_dev_attrs,
648 #define INPUT_DEV_ID_ATTR(name) \
649 static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \
651 struct input_dev *input_dev = to_input_dev(dev); \
652 return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \
654 static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL);
656 INPUT_DEV_ID_ATTR(bustype);
657 INPUT_DEV_ID_ATTR(vendor);
658 INPUT_DEV_ID_ATTR(product);
659 INPUT_DEV_ID_ATTR(version);
661 static struct attribute *input_dev_id_attrs[] = {
662 &class_device_attr_bustype.attr,
663 &class_device_attr_vendor.attr,
664 &class_device_attr_product.attr,
665 &class_device_attr_version.attr,
669 static struct attribute_group input_dev_id_attr_group = {
671 .attrs = input_dev_id_attrs,
674 static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
680 for (i = NBITS(max) - 1; i > 0; i--)
685 len += snprintf(buf + len, max(buf_size - len, 0),
686 "%lx%s", bitmap[i], i > 0 ? " " : "");
689 len += snprintf(buf + len, max(buf_size - len, 0), "\n");
694 #define INPUT_DEV_CAP_ATTR(ev, bm) \
695 static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \
697 struct input_dev *input_dev = to_input_dev(dev); \
698 int len = input_print_bitmap(buf, PAGE_SIZE, \
699 input_dev->bm##bit, ev##_MAX, 1); \
700 return min_t(int, len, PAGE_SIZE); \
702 static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL);
704 INPUT_DEV_CAP_ATTR(EV, ev);
705 INPUT_DEV_CAP_ATTR(KEY, key);
706 INPUT_DEV_CAP_ATTR(REL, rel);
707 INPUT_DEV_CAP_ATTR(ABS, abs);
708 INPUT_DEV_CAP_ATTR(MSC, msc);
709 INPUT_DEV_CAP_ATTR(LED, led);
710 INPUT_DEV_CAP_ATTR(SND, snd);
711 INPUT_DEV_CAP_ATTR(FF, ff);
712 INPUT_DEV_CAP_ATTR(SW, sw);
714 static struct attribute *input_dev_caps_attrs[] = {
715 &class_device_attr_ev.attr,
716 &class_device_attr_key.attr,
717 &class_device_attr_rel.attr,
718 &class_device_attr_abs.attr,
719 &class_device_attr_msc.attr,
720 &class_device_attr_led.attr,
721 &class_device_attr_snd.attr,
722 &class_device_attr_ff.attr,
723 &class_device_attr_sw.attr,
727 static struct attribute_group input_dev_caps_attr_group = {
728 .name = "capabilities",
729 .attrs = input_dev_caps_attrs,
732 static void input_dev_release(struct class_device *class_dev)
734 struct input_dev *dev = to_input_dev(class_dev);
737 module_put(THIS_MODULE);
741 * Input uevent interface - loading event handlers based on
744 static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index,
745 char *buffer, int buffer_size, int *cur_len,
746 const char *name, unsigned long *bitmap, int max)
748 if (*cur_index >= num_envp - 1)
751 envp[*cur_index] = buffer + *cur_len;
753 *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name);
754 if (*cur_len >= buffer_size)
757 *cur_len += input_print_bitmap(buffer + *cur_len,
758 max(buffer_size - *cur_len, 0),
760 if (*cur_len > buffer_size)
767 static int input_add_uevent_modalias_var(char **envp, int num_envp, int *cur_index,
768 char *buffer, int buffer_size, int *cur_len,
769 struct input_dev *dev)
771 if (*cur_index >= num_envp - 1)
774 envp[*cur_index] = buffer + *cur_len;
776 *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0),
778 if (*cur_len >= buffer_size)
781 *cur_len += input_print_modalias(buffer + *cur_len,
782 max(buffer_size - *cur_len, 0),
784 if (*cur_len > buffer_size)
791 #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \
793 int err = add_uevent_var(envp, num_envp, &i, \
794 buffer, buffer_size, &len, \
800 #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \
802 int err = input_add_uevent_bm_var(envp, num_envp, &i, \
803 buffer, buffer_size, &len, \
809 #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \
811 int err = input_add_uevent_modalias_var(envp, \
813 buffer, buffer_size, &len, \
819 static int input_dev_uevent(struct class_device *cdev, char **envp,
820 int num_envp, char *buffer, int buffer_size)
822 struct input_dev *dev = to_input_dev(cdev);
826 INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x",
827 dev->id.bustype, dev->id.vendor,
828 dev->id.product, dev->id.version);
830 INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name);
832 INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys);
834 INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq);
836 INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX);
837 if (test_bit(EV_KEY, dev->evbit))
838 INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX);
839 if (test_bit(EV_REL, dev->evbit))
840 INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX);
841 if (test_bit(EV_ABS, dev->evbit))
842 INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX);
843 if (test_bit(EV_MSC, dev->evbit))
844 INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX);
845 if (test_bit(EV_LED, dev->evbit))
846 INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX);
847 if (test_bit(EV_SND, dev->evbit))
848 INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX);
849 if (test_bit(EV_FF, dev->evbit))
850 INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX);
851 if (test_bit(EV_SW, dev->evbit))
852 INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX);
854 INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev);
860 struct class input_class = {
862 .release = input_dev_release,
863 .uevent = input_dev_uevent,
865 EXPORT_SYMBOL_GPL(input_class);
867 struct input_dev *input_allocate_device(void)
869 struct input_dev *dev;
871 dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL);
874 dev->cdev.class = &input_class;
875 class_device_initialize(&dev->cdev);
876 mutex_init(&dev->mutex);
877 INIT_LIST_HEAD(&dev->h_list);
878 INIT_LIST_HEAD(&dev->node);
883 EXPORT_SYMBOL(input_allocate_device);
885 void input_free_device(struct input_dev *dev)
889 mutex_lock(&dev->mutex);
890 dev->name = dev->phys = dev->uniq = NULL;
891 mutex_unlock(&dev->mutex);
893 input_put_device(dev);
896 EXPORT_SYMBOL(input_free_device);
898 int input_register_device(struct input_dev *dev)
900 static atomic_t input_no = ATOMIC_INIT(0);
901 struct input_handle *handle;
902 struct input_handler *handler;
903 struct input_device_id *id;
907 if (!dev->dynalloc) {
908 printk(KERN_WARNING "input: device %s is statically allocated, will not register\n"
909 "Please convert to input_allocate_device() or contact dtor_core@ameritech.net\n",
910 dev->name ? dev->name : "<Unknown>");
914 set_bit(EV_SYN, dev->evbit);
917 * If delay and period are pre-set by the driver, then autorepeating
918 * is handled by the driver itself and we don't do it in input.c.
921 init_timer(&dev->timer);
922 if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) {
923 dev->timer.data = (long) dev;
924 dev->timer.function = input_repeat_key;
925 dev->rep[REP_DELAY] = 250;
926 dev->rep[REP_PERIOD] = 33;
929 INIT_LIST_HEAD(&dev->h_list);
930 list_add_tail(&dev->node, &input_dev_list);
932 dev->cdev.class = &input_class;
933 snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id),
934 "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
936 error = class_device_add(&dev->cdev);
940 error = sysfs_create_group(&dev->cdev.kobj, &input_dev_attr_group);
944 error = sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group);
948 error = sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
952 __module_get(THIS_MODULE);
954 path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
955 printk(KERN_INFO "input: %s as %s\n",
956 dev->name ? dev->name : "Unspecified device", path ? path : "N/A");
959 list_for_each_entry(handler, &input_handler_list, node)
960 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
961 if ((id = input_match_device(handler->id_table, dev)))
962 if ((handle = handler->connect(handler, dev, id))) {
963 input_link_handle(handle);
965 handler->start(handle);
968 input_wakeup_procfs_readers();
972 fail3: sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
973 fail2: sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group);
974 fail1: class_device_del(&dev->cdev);
977 EXPORT_SYMBOL(input_register_device);
979 void input_unregister_device(struct input_dev *dev)
981 struct list_head *node, *next;
986 del_timer_sync(&dev->timer);
988 list_for_each_safe(node, next, &dev->h_list) {
989 struct input_handle * handle = to_handle(node);
990 list_del_init(&handle->d_node);
991 list_del_init(&handle->h_node);
992 handle->handler->disconnect(handle);
995 list_del_init(&dev->node);
997 sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
998 sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
999 sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group);
1001 mutex_lock(&dev->mutex);
1002 dev->name = dev->phys = dev->uniq = NULL;
1003 mutex_unlock(&dev->mutex);
1005 class_device_unregister(&dev->cdev);
1007 input_wakeup_procfs_readers();
1009 EXPORT_SYMBOL(input_unregister_device);
1011 void input_register_handler(struct input_handler *handler)
1013 struct input_dev *dev;
1014 struct input_handle *handle;
1015 struct input_device_id *id;
1020 INIT_LIST_HEAD(&handler->h_list);
1022 if (handler->fops != NULL)
1023 input_table[handler->minor >> 5] = handler;
1025 list_add_tail(&handler->node, &input_handler_list);
1027 list_for_each_entry(dev, &input_dev_list, node)
1028 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
1029 if ((id = input_match_device(handler->id_table, dev)))
1030 if ((handle = handler->connect(handler, dev, id)))
1031 input_link_handle(handle);
1033 input_wakeup_procfs_readers();
1035 EXPORT_SYMBOL(input_register_handler);
1037 void input_unregister_handler(struct input_handler *handler)
1039 struct list_head *node, *next;
1041 list_for_each_safe(node, next, &handler->h_list) {
1042 struct input_handle * handle = to_handle_h(node);
1043 list_del_init(&handle->h_node);
1044 list_del_init(&handle->d_node);
1045 handler->disconnect(handle);
1048 list_del_init(&handler->node);
1050 if (handler->fops != NULL)
1051 input_table[handler->minor >> 5] = NULL;
1053 input_wakeup_procfs_readers();
1055 EXPORT_SYMBOL(input_unregister_handler);
1057 static int input_open_file(struct inode *inode, struct file *file)
1059 struct input_handler *handler = input_table[iminor(inode) >> 5];
1060 const struct file_operations *old_fops, *new_fops = NULL;
1063 /* No load-on-demand here? */
1064 if (!handler || !(new_fops = fops_get(handler->fops)))
1068 * That's _really_ odd. Usually NULL ->open means "nothing special",
1069 * not "no device". Oh, well...
1071 if (!new_fops->open) {
1075 old_fops = file->f_op;
1076 file->f_op = new_fops;
1078 err = new_fops->open(inode, file);
1081 fops_put(file->f_op);
1082 file->f_op = fops_get(old_fops);
1088 static struct file_operations input_fops = {
1089 .owner = THIS_MODULE,
1090 .open = input_open_file,
1093 static int __init input_init(void)
1097 err = class_register(&input_class);
1099 printk(KERN_ERR "input: unable to register input_dev class\n");
1103 err = input_proc_init();
1107 err = register_chrdev(INPUT_MAJOR, "input", &input_fops);
1109 printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR);
1115 fail2: input_proc_exit();
1116 fail1: class_unregister(&input_class);
1120 static void __exit input_exit(void)
1123 unregister_chrdev(INPUT_MAJOR, "input");
1124 class_unregister(&input_class);
1127 subsys_initcall(input_init);
1128 module_exit(input_exit);