Lines Matching +full:input +full:- +full:value
1 // SPDX-License-Identifier: GPL-2.0-only
3 * The input core
5 * Copyright (c) 1999-2002 Vojtech Pavlik
14 #include <linux/input/mt.h>
26 #include "input-compat.h"
27 #include "input-poller.h"
30 MODULE_DESCRIPTION("Input core");
44 * input handlers.
56 static int input_defuzz_abs_event(int value, int old_val, int fuzz) in input_defuzz_abs_event() argument
59 if (value > (long)old_val - fuzz / 2 && in input_defuzz_abs_event()
60 value < (long)old_val + fuzz / 2) in input_defuzz_abs_event()
63 if (value > (long)old_val - fuzz && in input_defuzz_abs_event()
64 value < (long)old_val + fuzz) in input_defuzz_abs_event()
65 return ((long)old_val * 3 + value) / 4; in input_defuzz_abs_event()
67 if (value > (long)old_val - fuzz * 2 && in input_defuzz_abs_event()
68 value < (long)old_val + fuzz * 2) in input_defuzz_abs_event()
69 return ((long)old_val + value) / 2; in input_defuzz_abs_event()
72 return value; in input_defuzz_abs_event()
77 if (test_bit(EV_REP, dev->evbit) && in input_start_autorepeat()
78 dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && in input_start_autorepeat()
79 dev->timer.function) { in input_start_autorepeat()
80 dev->repeat_key = code; in input_start_autorepeat()
81 mod_timer(&dev->timer, in input_start_autorepeat()
82 jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); in input_start_autorepeat()
88 del_timer(&dev->timer); in input_stop_autorepeat()
94 * dev->event_lock held and interrupts disabled.
99 struct input_handler *handler = handle->handler; in input_to_handler()
103 if (handler->filter) { in input_to_handler()
105 if (handler->filter(handle, v->type, v->code, v->value)) in input_to_handler()
111 count = end - vals; in input_to_handler()
117 if (handler->events) in input_to_handler()
118 handler->events(handle, vals, count); in input_to_handler()
119 else if (handler->event) in input_to_handler()
121 handler->event(handle, v->type, v->code, v->value); in input_to_handler()
129 * dev->event_lock held and interrupts disabled.
142 handle = rcu_dereference(dev->grab); in input_pass_values()
146 list_for_each_entry_rcu(handle, &dev->h_list, d_node) in input_pass_values()
147 if (handle->open) { in input_pass_values()
157 if (test_bit(EV_REP, dev->evbit) && test_bit(EV_KEY, dev->evbit)) { in input_pass_values()
159 if (v->type == EV_KEY && v->value != 2) { in input_pass_values()
160 if (v->value) in input_pass_values()
161 input_start_autorepeat(dev, v->code); in input_pass_values()
170 unsigned int type, unsigned int code, int value) in input_pass_event() argument
172 struct input_value vals[] = { { type, code, value } }; in input_pass_event()
179 * dev->event_lock here to avoid racing with input_event
187 spin_lock_irqsave(&dev->event_lock, flags); in input_repeat_key()
189 if (test_bit(dev->repeat_key, dev->key) && in input_repeat_key()
190 is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) { in input_repeat_key()
192 { EV_KEY, dev->repeat_key, 2 }, in input_repeat_key()
199 if (dev->rep[REP_PERIOD]) in input_repeat_key()
200 mod_timer(&dev->timer, jiffies + in input_repeat_key()
201 msecs_to_jiffies(dev->rep[REP_PERIOD])); in input_repeat_key()
204 spin_unlock_irqrestore(&dev->event_lock, flags); in input_repeat_key()
217 struct input_mt *mt = dev->mt; in input_handle_abs_event()
226 if (mt && *pval >= 0 && *pval < mt->num_slots) in input_handle_abs_event()
227 mt->slot = *pval; in input_handle_abs_event()
235 pold = &dev->absinfo[code].value; in input_handle_abs_event()
237 pold = &mt->slots[mt->slot].abs[code - ABS_MT_FIRST]; in input_handle_abs_event()
240 * Bypass filtering for multi-touch events when in input_handle_abs_event()
248 dev->absinfo[code].fuzz); in input_handle_abs_event()
256 if (is_mt_event && mt && mt->slot != input_abs_get_val(dev, ABS_MT_SLOT)) { in input_handle_abs_event()
257 input_abs_set_val(dev, ABS_MT_SLOT, mt->slot); in input_handle_abs_event()
268 int value = *pval; in input_get_disposition() local
288 if (is_event_supported(code, dev->keybit, KEY_MAX)) { in input_get_disposition()
290 /* auto-repeat bypasses state updates */ in input_get_disposition()
291 if (value == 2) { in input_get_disposition()
296 if (!!test_bit(code, dev->key) != !!value) { in input_get_disposition()
298 __change_bit(code, dev->key); in input_get_disposition()
305 if (is_event_supported(code, dev->swbit, SW_MAX) && in input_get_disposition()
306 !!test_bit(code, dev->sw) != !!value) { in input_get_disposition()
308 __change_bit(code, dev->sw); in input_get_disposition()
314 if (is_event_supported(code, dev->absbit, ABS_MAX)) in input_get_disposition()
315 disposition = input_handle_abs_event(dev, code, &value); in input_get_disposition()
320 if (is_event_supported(code, dev->relbit, REL_MAX) && value) in input_get_disposition()
326 if (is_event_supported(code, dev->mscbit, MSC_MAX)) in input_get_disposition()
332 if (is_event_supported(code, dev->ledbit, LED_MAX) && in input_get_disposition()
333 !!test_bit(code, dev->led) != !!value) { in input_get_disposition()
335 __change_bit(code, dev->led); in input_get_disposition()
341 if (is_event_supported(code, dev->sndbit, SND_MAX)) { in input_get_disposition()
343 if (!!test_bit(code, dev->snd) != !!value) in input_get_disposition()
344 __change_bit(code, dev->snd); in input_get_disposition()
350 if (code <= REP_MAX && value >= 0 && dev->rep[code] != value) { in input_get_disposition()
351 dev->rep[code] = value; in input_get_disposition()
357 if (value >= 0) in input_get_disposition()
366 *pval = value; in input_get_disposition()
371 unsigned int type, unsigned int code, int value) in input_handle_event() argument
373 int disposition = input_get_disposition(dev, type, code, &value); in input_handle_event()
376 add_input_randomness(type, code, value); in input_handle_event()
378 if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event) in input_handle_event()
379 dev->event(dev, type, code, value); in input_handle_event()
381 if (!dev->vals) in input_handle_event()
388 v = &dev->vals[dev->num_vals++]; in input_handle_event()
389 v->type = EV_ABS; in input_handle_event()
390 v->code = ABS_MT_SLOT; in input_handle_event()
391 v->value = dev->mt->slot; in input_handle_event()
394 v = &dev->vals[dev->num_vals++]; in input_handle_event()
395 v->type = type; in input_handle_event()
396 v->code = code; in input_handle_event()
397 v->value = value; in input_handle_event()
401 if (dev->num_vals >= 2) in input_handle_event()
402 input_pass_values(dev, dev->vals, dev->num_vals); in input_handle_event()
403 dev->num_vals = 0; in input_handle_event()
410 dev->timestamp[INPUT_CLK_MONO] = ktime_set(0, 0); in input_handle_event()
411 } else if (dev->num_vals >= dev->max_vals - 2) { in input_handle_event()
412 dev->vals[dev->num_vals++] = input_value_sync; in input_handle_event()
413 input_pass_values(dev, dev->vals, dev->num_vals); in input_handle_event()
414 dev->num_vals = 0; in input_handle_event()
420 * input_event() - report new input event
424 * @value: value of the event
426 * This function should be used by drivers implementing various input
427 * devices to report input events. See also input_inject_event().
429 * NOTE: input_event() may be safely used right after input device was
432 * input handlers. Such early invocation of input_event() may be used
437 unsigned int type, unsigned int code, int value) in input_event() argument
441 if (is_event_supported(type, dev->evbit, EV_MAX)) { in input_event()
443 spin_lock_irqsave(&dev->event_lock, flags); in input_event()
444 input_handle_event(dev, type, code, value); in input_event()
445 spin_unlock_irqrestore(&dev->event_lock, flags); in input_event()
451 * input_inject_event() - send input event from input handler
452 * @handle: input handle to send event through
455 * @value: value of the event
462 unsigned int type, unsigned int code, int value) in input_inject_event() argument
464 struct input_dev *dev = handle->dev; in input_inject_event()
468 if (is_event_supported(type, dev->evbit, EV_MAX)) { in input_inject_event()
469 spin_lock_irqsave(&dev->event_lock, flags); in input_inject_event()
472 grab = rcu_dereference(dev->grab); in input_inject_event()
474 input_handle_event(dev, type, code, value); in input_inject_event()
477 spin_unlock_irqrestore(&dev->event_lock, flags); in input_inject_event()
483 * input_alloc_absinfo - allocates array of input_absinfo structs
484 * @dev: the input device emitting absolute events
491 if (dev->absinfo) in input_alloc_absinfo()
494 dev->absinfo = kcalloc(ABS_CNT, sizeof(*dev->absinfo), GFP_KERNEL); in input_alloc_absinfo()
495 if (!dev->absinfo) { in input_alloc_absinfo()
496 dev_err(dev->dev.parent ?: &dev->dev, in input_alloc_absinfo()
500 * input_register_device() when we refuse to register input in input_alloc_absinfo()
513 if (!dev->absinfo) in input_set_abs_params()
516 absinfo = &dev->absinfo[axis]; in input_set_abs_params()
517 absinfo->minimum = min; in input_set_abs_params()
518 absinfo->maximum = max; in input_set_abs_params()
519 absinfo->fuzz = fuzz; in input_set_abs_params()
520 absinfo->flat = flat; in input_set_abs_params()
522 __set_bit(EV_ABS, dev->evbit); in input_set_abs_params()
523 __set_bit(axis, dev->absbit); in input_set_abs_params()
529 * input_grab_device - grabs device for exclusive use
530 * @handle: input handle that wants to own the device
532 * When a device is grabbed by an input handle all events generated by
534 * by other input handles are ignored while device is grabbed.
538 struct input_dev *dev = handle->dev; in input_grab_device()
541 retval = mutex_lock_interruptible(&dev->mutex); in input_grab_device()
545 if (dev->grab) { in input_grab_device()
546 retval = -EBUSY; in input_grab_device()
550 rcu_assign_pointer(dev->grab, handle); in input_grab_device()
553 mutex_unlock(&dev->mutex); in input_grab_device()
560 struct input_dev *dev = handle->dev; in __input_release_device()
563 grabber = rcu_dereference_protected(dev->grab, in __input_release_device()
564 lockdep_is_held(&dev->mutex)); in __input_release_device()
566 rcu_assign_pointer(dev->grab, NULL); in __input_release_device()
570 list_for_each_entry(handle, &dev->h_list, d_node) in __input_release_device()
571 if (handle->open && handle->handler->start) in __input_release_device()
572 handle->handler->start(handle); in __input_release_device()
577 * input_release_device - release previously grabbed device
578 * @handle: input handle that owns the device
580 * Releases previously grabbed device so that other input handles can
581 * start receiving input events. Upon release all handlers attached
587 struct input_dev *dev = handle->dev; in input_release_device()
589 mutex_lock(&dev->mutex); in input_release_device()
591 mutex_unlock(&dev->mutex); in input_release_device()
596 * input_open_device - open input device
599 * This function should be called by input handlers when they
600 * want to start receive events from given input device.
604 struct input_dev *dev = handle->dev; in input_open_device()
607 retval = mutex_lock_interruptible(&dev->mutex); in input_open_device()
611 if (dev->going_away) { in input_open_device()
612 retval = -ENODEV; in input_open_device()
616 handle->open++; in input_open_device()
618 if (dev->users++) { in input_open_device()
626 if (dev->open) { in input_open_device()
627 retval = dev->open(dev); in input_open_device()
629 dev->users--; in input_open_device()
630 handle->open--; in input_open_device()
640 if (dev->poller) in input_open_device()
641 input_dev_poller_start(dev->poller); in input_open_device()
644 mutex_unlock(&dev->mutex); in input_open_device()
651 struct input_dev *dev = handle->dev; in input_flush_device()
654 retval = mutex_lock_interruptible(&dev->mutex); in input_flush_device()
658 if (dev->flush) in input_flush_device()
659 retval = dev->flush(dev, file); in input_flush_device()
661 mutex_unlock(&dev->mutex); in input_flush_device()
667 * input_close_device - close input device
670 * This function should be called by input handlers when they
671 * want to stop receive events from given input device.
675 struct input_dev *dev = handle->dev; in input_close_device()
677 mutex_lock(&dev->mutex); in input_close_device()
681 if (!--dev->users) { in input_close_device()
682 if (dev->poller) in input_close_device()
683 input_dev_poller_stop(dev->poller); in input_close_device()
685 if (dev->close) in input_close_device()
686 dev->close(dev); in input_close_device()
689 if (!--handle->open) { in input_close_device()
692 * completed and that no more input events are delivered in input_close_device()
698 mutex_unlock(&dev->mutex); in input_close_device()
704 * The function must be called with dev->event_lock held.
711 if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) { in input_dev_release_keys()
712 for_each_set_bit(code, dev->key, KEY_CNT) { in input_dev_release_keys()
720 memset(dev->key, 0, sizeof(dev->key)); in input_dev_release_keys()
732 * Mark device as going away. Note that we take dev->mutex here in input_disconnect_device()
733 * not to protect access to dev->going_away but rather to ensure in input_disconnect_device()
736 mutex_lock(&dev->mutex); in input_disconnect_device()
737 dev->going_away = true; in input_disconnect_device()
738 mutex_unlock(&dev->mutex); in input_disconnect_device()
740 spin_lock_irq(&dev->event_lock); in input_disconnect_device()
750 list_for_each_entry(handle, &dev->h_list, d_node) in input_disconnect_device()
751 handle->open = 0; in input_disconnect_device()
753 spin_unlock_irq(&dev->event_lock); in input_disconnect_device()
757 * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry
769 switch (ke->len) { in input_scancode_to_scalar()
771 *scancode = *((u8 *)ke->scancode); in input_scancode_to_scalar()
775 *scancode = *((u16 *)ke->scancode); in input_scancode_to_scalar()
779 *scancode = *((u32 *)ke->scancode); in input_scancode_to_scalar()
783 return -EINVAL; in input_scancode_to_scalar()
798 switch (dev->keycodesize) { in input_fetch_keycode()
800 return ((u8 *)dev->keycode)[index]; in input_fetch_keycode()
803 return ((u16 *)dev->keycode)[index]; in input_fetch_keycode()
806 return ((u32 *)dev->keycode)[index]; in input_fetch_keycode()
816 if (!dev->keycodesize) in input_default_getkeycode()
817 return -EINVAL; in input_default_getkeycode()
819 if (ke->flags & INPUT_KEYMAP_BY_INDEX) in input_default_getkeycode()
820 index = ke->index; in input_default_getkeycode()
827 if (index >= dev->keycodemax) in input_default_getkeycode()
828 return -EINVAL; in input_default_getkeycode()
830 ke->keycode = input_fetch_keycode(dev, index); in input_default_getkeycode()
831 ke->index = index; in input_default_getkeycode()
832 ke->len = sizeof(index); in input_default_getkeycode()
833 memcpy(ke->scancode, &index, sizeof(index)); in input_default_getkeycode()
846 if (!dev->keycodesize) in input_default_setkeycode()
847 return -EINVAL; in input_default_setkeycode()
849 if (ke->flags & INPUT_KEYMAP_BY_INDEX) { in input_default_setkeycode()
850 index = ke->index; in input_default_setkeycode()
857 if (index >= dev->keycodemax) in input_default_setkeycode()
858 return -EINVAL; in input_default_setkeycode()
860 if (dev->keycodesize < sizeof(ke->keycode) && in input_default_setkeycode()
861 (ke->keycode >> (dev->keycodesize * 8))) in input_default_setkeycode()
862 return -EINVAL; in input_default_setkeycode()
864 switch (dev->keycodesize) { in input_default_setkeycode()
866 u8 *k = (u8 *)dev->keycode; in input_default_setkeycode()
868 k[index] = ke->keycode; in input_default_setkeycode()
872 u16 *k = (u16 *)dev->keycode; in input_default_setkeycode()
874 k[index] = ke->keycode; in input_default_setkeycode()
878 u32 *k = (u32 *)dev->keycode; in input_default_setkeycode()
880 k[index] = ke->keycode; in input_default_setkeycode()
886 __clear_bit(*old_keycode, dev->keybit); in input_default_setkeycode()
887 for (i = 0; i < dev->keycodemax; i++) { in input_default_setkeycode()
889 __set_bit(*old_keycode, dev->keybit); in input_default_setkeycode()
896 __set_bit(ke->keycode, dev->keybit); in input_default_setkeycode()
901 * input_get_keycode - retrieve keycode currently mapped to a given scancode
902 * @dev: input device which keymap is being queried
913 spin_lock_irqsave(&dev->event_lock, flags); in input_get_keycode()
914 retval = dev->getkeycode(dev, ke); in input_get_keycode()
915 spin_unlock_irqrestore(&dev->event_lock, flags); in input_get_keycode()
922 * input_set_keycode - attribute a keycode to a given scancode
923 * @dev: input device which keymap is being updated
936 if (ke->keycode > KEY_MAX) in input_set_keycode()
937 return -EINVAL; in input_set_keycode()
939 spin_lock_irqsave(&dev->event_lock, flags); in input_set_keycode()
941 retval = dev->setkeycode(dev, ke, &old_keycode); in input_set_keycode()
946 __clear_bit(KEY_RESERVED, dev->keybit); in input_set_keycode()
953 dev_warn(dev->dev.parent ?: &dev->dev, in input_set_keycode()
956 } else if (test_bit(EV_KEY, dev->evbit) && in input_set_keycode()
957 !is_event_supported(old_keycode, dev->keybit, KEY_MAX) && in input_set_keycode()
958 __test_and_clear_bit(old_keycode, dev->key)) { in input_set_keycode()
968 spin_unlock_irqrestore(&dev->event_lock, flags); in input_set_keycode()
977 if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) in input_match_device_id()
978 if (id->bustype != dev->id.bustype) in input_match_device_id()
981 if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) in input_match_device_id()
982 if (id->vendor != dev->id.vendor) in input_match_device_id()
985 if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) in input_match_device_id()
986 if (id->product != dev->id.product) in input_match_device_id()
989 if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) in input_match_device_id()
990 if (id->version != dev->id.version) in input_match_device_id()
993 if (!bitmap_subset(id->evbit, dev->evbit, EV_MAX) || in input_match_device_id()
994 !bitmap_subset(id->keybit, dev->keybit, KEY_MAX) || in input_match_device_id()
995 !bitmap_subset(id->relbit, dev->relbit, REL_MAX) || in input_match_device_id()
996 !bitmap_subset(id->absbit, dev->absbit, ABS_MAX) || in input_match_device_id()
997 !bitmap_subset(id->mscbit, dev->mscbit, MSC_MAX) || in input_match_device_id()
998 !bitmap_subset(id->ledbit, dev->ledbit, LED_MAX) || in input_match_device_id()
999 !bitmap_subset(id->sndbit, dev->sndbit, SND_MAX) || in input_match_device_id()
1000 !bitmap_subset(id->ffbit, dev->ffbit, FF_MAX) || in input_match_device_id()
1001 !bitmap_subset(id->swbit, dev->swbit, SW_MAX) || in input_match_device_id()
1002 !bitmap_subset(id->propbit, dev->propbit, INPUT_PROP_MAX)) { in input_match_device_id()
1015 for (id = handler->id_table; id->flags || id->driver_info; id++) { in input_match_device()
1017 (!handler->match || handler->match(handler, dev))) { in input_match_device()
1032 return -ENODEV; in input_attach_handler()
1034 error = handler->connect(handler, dev, id); in input_attach_handler()
1035 if (error && error != -ENODEV) in input_attach_handler()
1037 handler->name, kobject_name(&dev->dev.kobj), error); in input_attach_handler()
1056 len += snprintf(buf + len, max(buf_size - len, 0), in input_bits_to_string()
1092 if (file->f_version != input_devices_state) { in input_proc_devices_poll()
1093 file->f_version = input_devices_state; in input_proc_devices_poll()
1110 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_devices_seq_start()
1113 /* We need to fit into seq->private pointer */ in input_devices_seq_start()
1114 BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); in input_devices_seq_start()
1118 state->mutex_acquired = false; in input_devices_seq_start()
1122 state->mutex_acquired = true; in input_devices_seq_start()
1134 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_seq_stop()
1136 if (state->mutex_acquired) in input_seq_stop()
1149 for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { in input_seq_print_bitmap()
1169 const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); in input_devices_seq_show()
1173 dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); in input_devices_seq_show()
1175 seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); in input_devices_seq_show()
1176 seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); in input_devices_seq_show()
1178 seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : ""); in input_devices_seq_show()
1181 list_for_each_entry(handle, &dev->h_list, d_node) in input_devices_seq_show()
1182 seq_printf(seq, "%s ", handle->name); in input_devices_seq_show()
1185 input_seq_print_bitmap(seq, "PROP", dev->propbit, INPUT_PROP_MAX); in input_devices_seq_show()
1187 input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); in input_devices_seq_show()
1188 if (test_bit(EV_KEY, dev->evbit)) in input_devices_seq_show()
1189 input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); in input_devices_seq_show()
1190 if (test_bit(EV_REL, dev->evbit)) in input_devices_seq_show()
1191 input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); in input_devices_seq_show()
1192 if (test_bit(EV_ABS, dev->evbit)) in input_devices_seq_show()
1193 input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); in input_devices_seq_show()
1194 if (test_bit(EV_MSC, dev->evbit)) in input_devices_seq_show()
1195 input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); in input_devices_seq_show()
1196 if (test_bit(EV_LED, dev->evbit)) in input_devices_seq_show()
1197 input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); in input_devices_seq_show()
1198 if (test_bit(EV_SND, dev->evbit)) in input_devices_seq_show()
1199 input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); in input_devices_seq_show()
1200 if (test_bit(EV_FF, dev->evbit)) in input_devices_seq_show()
1201 input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); in input_devices_seq_show()
1202 if (test_bit(EV_SW, dev->evbit)) in input_devices_seq_show()
1203 input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); in input_devices_seq_show()
1233 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_handlers_seq_start()
1236 /* We need to fit into seq->private pointer */ in input_handlers_seq_start()
1237 BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); in input_handlers_seq_start()
1241 state->mutex_acquired = false; in input_handlers_seq_start()
1245 state->mutex_acquired = true; in input_handlers_seq_start()
1246 state->pos = *pos; in input_handlers_seq_start()
1253 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_handlers_seq_next()
1255 state->pos = *pos + 1; in input_handlers_seq_next()
1262 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_handlers_seq_show()
1264 seq_printf(seq, "N: Number=%u Name=%s", state->pos, handler->name); in input_handlers_seq_show()
1265 if (handler->filter) in input_handlers_seq_show()
1267 if (handler->legacy_minors) in input_handlers_seq_show()
1268 seq_printf(seq, " Minor=%d", handler->minor); in input_handlers_seq_show()
1297 proc_bus_input_dir = proc_mkdir("bus/input", NULL); in input_proc_init()
1299 return -ENOMEM; in input_proc_init()
1314 fail1: remove_proc_entry("bus/input", NULL); in input_proc_init()
1315 return -ENOMEM; in input_proc_init()
1322 remove_proc_entry("bus/input", NULL); in input_proc_exit()
1339 input_dev->name ? input_dev->name : ""); \
1356 len += snprintf(buf + len, max(size - len, 0), "%X,", i); in input_print_modalias_bits()
1366 "input:b%04Xv%04Xp%04Xe%04X-", in input_print_modalias()
1367 id->id.bustype, id->id.vendor, in input_print_modalias()
1368 id->id.product, id->id.version); in input_print_modalias()
1370 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1371 'e', id->evbit, 0, EV_MAX); in input_print_modalias()
1372 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1373 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); in input_print_modalias()
1374 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1375 'r', id->relbit, 0, REL_MAX); in input_print_modalias()
1376 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1377 'a', id->absbit, 0, ABS_MAX); in input_print_modalias()
1378 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1379 'm', id->mscbit, 0, MSC_MAX); in input_print_modalias()
1380 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1381 'l', id->ledbit, 0, LED_MAX); in input_print_modalias()
1382 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1383 's', id->sndbit, 0, SND_MAX); in input_print_modalias()
1384 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1385 'f', id->ffbit, 0, FF_MAX); in input_print_modalias()
1386 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1387 'w', id->swbit, 0, SW_MAX); in input_print_modalias()
1390 len += snprintf(buf + len, max(size - len, 0), "\n"); in input_print_modalias()
1416 int len = input_print_bitmap(buf, PAGE_SIZE, input_dev->propbit, in input_dev_show_properties()
1441 return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \
1470 for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { in input_print_bitmap()
1471 len += input_bits_to_string(buf + len, max(buf_size - len, 0), in input_print_bitmap()
1476 len += snprintf(buf + len, max(buf_size - len, 0), " "); in input_print_bitmap()
1487 len += snprintf(buf + len, max(buf_size - len, 0), "\n"); in input_print_bitmap()
1499 input_dev->bm##bit, ev##_MAX, \
1547 kfree(dev->poller); in input_dev_release()
1548 kfree(dev->absinfo); in input_dev_release()
1549 kfree(dev->vals); in input_dev_release()
1556 * Input uevent interface - loading event handlers based on
1565 return -ENOMEM; in input_add_uevent_bm_var()
1567 len = input_print_bitmap(&env->buf[env->buflen - 1], in input_add_uevent_bm_var()
1568 sizeof(env->buf) - env->buflen, in input_add_uevent_bm_var()
1570 if (len >= (sizeof(env->buf) - env->buflen)) in input_add_uevent_bm_var()
1571 return -ENOMEM; in input_add_uevent_bm_var()
1573 env->buflen += len; in input_add_uevent_bm_var()
1583 return -ENOMEM; in input_add_uevent_modalias_var()
1585 len = input_print_modalias(&env->buf[env->buflen - 1], in input_add_uevent_modalias_var()
1586 sizeof(env->buf) - env->buflen, in input_add_uevent_modalias_var()
1588 if (len >= (sizeof(env->buf) - env->buflen)) in input_add_uevent_modalias_var()
1589 return -ENOMEM; in input_add_uevent_modalias_var()
1591 env->buflen += len; in input_add_uevent_modalias_var()
1621 dev->id.bustype, dev->id.vendor, in input_dev_uevent()
1622 dev->id.product, dev->id.version); in input_dev_uevent()
1623 if (dev->name) in input_dev_uevent()
1624 INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); in input_dev_uevent()
1625 if (dev->phys) in input_dev_uevent()
1626 INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); in input_dev_uevent()
1627 if (dev->uniq) in input_dev_uevent()
1628 INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); in input_dev_uevent()
1630 INPUT_ADD_HOTPLUG_BM_VAR("PROP=", dev->propbit, INPUT_PROP_MAX); in input_dev_uevent()
1632 INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); in input_dev_uevent()
1633 if (test_bit(EV_KEY, dev->evbit)) in input_dev_uevent()
1634 INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); in input_dev_uevent()
1635 if (test_bit(EV_REL, dev->evbit)) in input_dev_uevent()
1636 INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); in input_dev_uevent()
1637 if (test_bit(EV_ABS, dev->evbit)) in input_dev_uevent()
1638 INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); in input_dev_uevent()
1639 if (test_bit(EV_MSC, dev->evbit)) in input_dev_uevent()
1640 INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); in input_dev_uevent()
1641 if (test_bit(EV_LED, dev->evbit)) in input_dev_uevent()
1642 INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); in input_dev_uevent()
1643 if (test_bit(EV_SND, dev->evbit)) in input_dev_uevent()
1644 INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); in input_dev_uevent()
1645 if (test_bit(EV_FF, dev->evbit)) in input_dev_uevent()
1646 INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); in input_dev_uevent()
1647 if (test_bit(EV_SW, dev->evbit)) in input_dev_uevent()
1648 INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); in input_dev_uevent()
1660 if (!test_bit(EV_##type, dev->evbit)) \
1663 for_each_set_bit(i, dev->bits##bit, type##_CNT) { \
1664 active = test_bit(i, dev->bits); \
1668 dev->event(dev, EV_##type, i, on ? active : 0); \
1674 if (!dev->event) in input_dev_toggle()
1680 if (activate && test_bit(EV_REP, dev->evbit)) { in input_dev_toggle()
1681 dev->event(dev, EV_REP, REP_PERIOD, dev->rep[REP_PERIOD]); in input_dev_toggle()
1682 dev->event(dev, EV_REP, REP_DELAY, dev->rep[REP_DELAY]); in input_dev_toggle()
1687 * input_reset_device() - reset/restore the state of input device
1688 * @dev: input device whose state needs to be reset
1690 * This function tries to reset the state of an opened input device and
1698 mutex_lock(&dev->mutex); in input_reset_device()
1699 spin_lock_irqsave(&dev->event_lock, flags); in input_reset_device()
1704 spin_unlock_irqrestore(&dev->event_lock, flags); in input_reset_device()
1705 mutex_unlock(&dev->mutex); in input_reset_device()
1714 spin_lock_irq(&input_dev->event_lock); in input_dev_suspend()
1725 spin_unlock_irq(&input_dev->event_lock); in input_dev_suspend()
1734 spin_lock_irq(&input_dev->event_lock); in input_dev_resume()
1739 spin_unlock_irq(&input_dev->event_lock); in input_dev_resume()
1748 spin_lock_irq(&input_dev->event_lock); in input_dev_freeze()
1756 spin_unlock_irq(&input_dev->event_lock); in input_dev_freeze()
1765 spin_lock_irq(&input_dev->event_lock); in input_dev_poweroff()
1770 spin_unlock_irq(&input_dev->event_lock); in input_dev_poweroff()
1795 return kasprintf(GFP_KERNEL, "input/%s", dev_name(dev)); in input_devnode()
1799 .name = "input",
1805 * input_allocate_device - allocate memory for new input device
1815 static atomic_t input_no = ATOMIC_INIT(-1); in input_allocate_device()
1820 dev->dev.type = &input_dev_type; in input_allocate_device()
1821 dev->dev.class = &input_class; in input_allocate_device()
1822 device_initialize(&dev->dev); in input_allocate_device()
1823 mutex_init(&dev->mutex); in input_allocate_device()
1824 spin_lock_init(&dev->event_lock); in input_allocate_device()
1825 timer_setup(&dev->timer, NULL, 0); in input_allocate_device()
1826 INIT_LIST_HEAD(&dev->h_list); in input_allocate_device()
1827 INIT_LIST_HEAD(&dev->node); in input_allocate_device()
1829 dev_set_name(&dev->dev, "input%lu", in input_allocate_device()
1840 struct input_dev *input; member
1847 return devres->input == data; in devm_input_device_match()
1853 struct input_dev *input = devres->input; in devm_input_device_release() local
1856 __func__, dev_name(&input->dev)); in devm_input_device_release()
1857 input_put_device(input); in devm_input_device_release()
1861 * devm_input_allocate_device - allocate managed input device
1862 * @dev: device owning the input device being created
1866 * Managed input devices do not need to be explicitly unregistered or
1868 * its driver (or binding fails). Once managed input device is allocated,
1870 * input device. There are no special devm_input_device_[un]register()
1872 * should you need them. In most cases however, managed input device need
1875 * NOTE: the owner device is set up as parent of input device and users
1880 struct input_dev *input; in devm_input_allocate_device() local
1888 input = input_allocate_device(); in devm_input_allocate_device()
1889 if (!input) { in devm_input_allocate_device()
1894 input->dev.parent = dev; in devm_input_allocate_device()
1895 input->devres_managed = true; in devm_input_allocate_device()
1897 devres->input = input; in devm_input_allocate_device()
1900 return input; in devm_input_allocate_device()
1905 * input_free_device - free memory occupied by input_dev structure
1906 * @dev: input device to free
1915 * NOTE: If there are references to the input device then memory
1921 if (dev->devres_managed) in input_free_device()
1922 WARN_ON(devres_destroy(dev->dev.parent, in input_free_device()
1932 * input_set_timestamp - set timestamp for input events
1933 * @dev: input device to set timestamp for
1937 * This function is intended to provide to the input system a more
1947 dev->timestamp[INPUT_CLK_MONO] = timestamp; in input_set_timestamp()
1948 dev->timestamp[INPUT_CLK_REAL] = ktime_mono_to_real(timestamp); in input_set_timestamp()
1949 dev->timestamp[INPUT_CLK_BOOT] = ktime_mono_to_any(timestamp, in input_set_timestamp()
1955 * input_get_timestamp - get timestamp for input events
1956 * @dev: input device to get timestamp from
1958 * A valid timestamp is a timestamp of non-zero value.
1964 if (!ktime_compare(dev->timestamp[INPUT_CLK_MONO], invalid_timestamp)) in input_get_timestamp()
1967 return dev->timestamp; in input_get_timestamp()
1972 * input_set_capability - mark device as capable of a certain event
1978 * bitmap the function also adjusts dev->evbit.
1984 __set_bit(code, dev->keybit); in input_set_capability()
1988 __set_bit(code, dev->relbit); in input_set_capability()
1993 if (!dev->absinfo) in input_set_capability()
1996 __set_bit(code, dev->absbit); in input_set_capability()
2000 __set_bit(code, dev->mscbit); in input_set_capability()
2004 __set_bit(code, dev->swbit); in input_set_capability()
2008 __set_bit(code, dev->ledbit); in input_set_capability()
2012 __set_bit(code, dev->sndbit); in input_set_capability()
2016 __set_bit(code, dev->ffbit); in input_set_capability()
2029 __set_bit(type, dev->evbit); in input_set_capability()
2039 if (dev->mt) { in input_estimate_events_per_packet()
2040 mt_slots = dev->mt->num_slots; in input_estimate_events_per_packet()
2041 } else if (test_bit(ABS_MT_TRACKING_ID, dev->absbit)) { in input_estimate_events_per_packet()
2042 mt_slots = dev->absinfo[ABS_MT_TRACKING_ID].maximum - in input_estimate_events_per_packet()
2043 dev->absinfo[ABS_MT_TRACKING_ID].minimum + 1, in input_estimate_events_per_packet()
2045 } else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) { in input_estimate_events_per_packet()
2053 if (test_bit(EV_ABS, dev->evbit)) in input_estimate_events_per_packet()
2054 for_each_set_bit(i, dev->absbit, ABS_CNT) in input_estimate_events_per_packet()
2057 if (test_bit(EV_REL, dev->evbit)) in input_estimate_events_per_packet()
2058 events += bitmap_weight(dev->relbit, REL_CNT); in input_estimate_events_per_packet()
2068 if (!test_bit(EV_##type, dev->evbit)) \
2069 memset(dev->bits##bit, 0, \
2070 sizeof(dev->bits##bit)); \
2093 list_for_each_entry_safe(handle, next, &dev->h_list, d_node) in __input_unregister_device()
2094 handle->handler->disconnect(handle); in __input_unregister_device()
2095 WARN_ON(!list_empty(&dev->h_list)); in __input_unregister_device()
2097 del_timer_sync(&dev->timer); in __input_unregister_device()
2098 list_del_init(&dev->node); in __input_unregister_device()
2104 device_del(&dev->dev); in __input_unregister_device()
2110 struct input_dev *input = devres->input; in devm_input_device_unregister() local
2113 __func__, dev_name(&input->dev)); in devm_input_device_unregister()
2114 __input_unregister_device(input); in devm_input_device_unregister()
2118 * input_enable_softrepeat - enable software autorepeat
2119 * @dev: input device
2123 * Enable software autorepeat on the input device.
2127 dev->timer.function = input_repeat_key; in input_enable_softrepeat()
2128 dev->rep[REP_DELAY] = delay; in input_enable_softrepeat()
2129 dev->rep[REP_PERIOD] = period; in input_enable_softrepeat()
2134 * input_register_device - register device with input core
2137 * This function registers device with input core. The device must be
2145 * Note that this function is also used to register managed input devices
2146 * (ones allocated with devm_input_allocate_device()). Such managed input
2149 * that tear down of managed input devices is internally a 2-step process:
2150 * registered managed input device is first unregistered, but stays in
2152 * not be delivered anywhere). The freeing of managed input device will
2164 if (test_bit(EV_ABS, dev->evbit) && !dev->absinfo) { in input_register_device()
2165 dev_err(&dev->dev, in input_register_device()
2166 "Absolute device without dev->absinfo, refusing to register\n"); in input_register_device()
2167 return -EINVAL; in input_register_device()
2170 if (dev->devres_managed) { in input_register_device()
2174 return -ENOMEM; in input_register_device()
2176 devres->input = dev; in input_register_device()
2179 /* Every input device generates EV_SYN/SYN_REPORT events. */ in input_register_device()
2180 __set_bit(EV_SYN, dev->evbit); in input_register_device()
2183 __clear_bit(KEY_RESERVED, dev->keybit); in input_register_device()
2185 /* Make sure that bitmasks not mentioned in dev->evbit are clean. */ in input_register_device()
2189 if (dev->hint_events_per_packet < packet_size) in input_register_device()
2190 dev->hint_events_per_packet = packet_size; in input_register_device()
2192 dev->max_vals = dev->hint_events_per_packet + 2; in input_register_device()
2193 dev->vals = kcalloc(dev->max_vals, sizeof(*dev->vals), GFP_KERNEL); in input_register_device()
2194 if (!dev->vals) { in input_register_device()
2195 error = -ENOMEM; in input_register_device()
2200 * If delay and period are pre-set by the driver, then autorepeating in input_register_device()
2201 * is handled by the driver itself and we don't do it in input.c. in input_register_device()
2203 if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) in input_register_device()
2206 if (!dev->getkeycode) in input_register_device()
2207 dev->getkeycode = input_default_getkeycode; in input_register_device()
2209 if (!dev->setkeycode) in input_register_device()
2210 dev->setkeycode = input_default_setkeycode; in input_register_device()
2212 if (dev->poller) in input_register_device()
2213 input_dev_poller_finalize(dev->poller); in input_register_device()
2215 error = device_add(&dev->dev); in input_register_device()
2219 path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); in input_register_device()
2221 dev->name ? dev->name : "Unspecified device", in input_register_device()
2229 list_add_tail(&dev->node, &input_dev_list); in input_register_device()
2238 if (dev->devres_managed) { in input_register_device()
2239 dev_dbg(dev->dev.parent, "%s: registering %s with devres.\n", in input_register_device()
2240 __func__, dev_name(&dev->dev)); in input_register_device()
2241 devres_add(dev->dev.parent, devres); in input_register_device()
2246 device_del(&dev->dev); in input_register_device()
2248 kfree(dev->vals); in input_register_device()
2249 dev->vals = NULL; in input_register_device()
2257 * input_unregister_device - unregister previously registered device
2260 * This function unregisters an input device. Once device is unregistered
2265 if (dev->devres_managed) { in input_unregister_device()
2266 WARN_ON(devres_destroy(dev->dev.parent, in input_unregister_device()
2283 * input_register_handler - register a new input handler
2286 * This function registers a new input handler (interface) for input
2287 * devices in the system and attaches it to all input devices that
2299 INIT_LIST_HEAD(&handler->h_list); in input_register_handler()
2301 list_add_tail(&handler->node, &input_handler_list); in input_register_handler()
2314 * input_unregister_handler - unregisters an input handler
2317 * This function disconnects a handler from its input devices and
2326 list_for_each_entry_safe(handle, next, &handler->h_list, h_node) in input_unregister_handler()
2327 handler->disconnect(handle); in input_unregister_handler()
2328 WARN_ON(!list_empty(&handler->h_list)); in input_unregister_handler()
2330 list_del_init(&handler->node); in input_unregister_handler()
2339 * input_handler_for_each_handle - handle iterator
2340 * @handler: input handler to iterate
2345 * it @data and stop when @fn returns a non-zero value. The function is
2358 list_for_each_entry_rcu(handle, &handler->h_list, h_node) { in input_handler_for_each_handle()
2371 * input_register_handle - register a new input handle
2374 * This function puts a new input handle onto device's
2383 struct input_handler *handler = handle->handler; in input_register_handle()
2384 struct input_dev *dev = handle->dev; in input_register_handle()
2388 * We take dev->mutex here to prevent race with in input_register_handle()
2391 error = mutex_lock_interruptible(&dev->mutex); in input_register_handle()
2399 if (handler->filter) in input_register_handle()
2400 list_add_rcu(&handle->d_node, &dev->h_list); in input_register_handle()
2402 list_add_tail_rcu(&handle->d_node, &dev->h_list); in input_register_handle()
2404 mutex_unlock(&dev->mutex); in input_register_handle()
2407 * Since we are supposed to be called from ->connect() in input_register_handle()
2408 * which is mutually exclusive with ->disconnect() in input_register_handle()
2412 list_add_tail_rcu(&handle->h_node, &handler->h_list); in input_register_handle()
2414 if (handler->start) in input_register_handle()
2415 handler->start(handle); in input_register_handle()
2422 * input_unregister_handle - unregister an input handle
2425 * This function removes input handle from device's
2433 struct input_dev *dev = handle->dev; in input_unregister_handle()
2435 list_del_rcu(&handle->h_node); in input_unregister_handle()
2438 * Take dev->mutex to prevent race with input_release_device(). in input_unregister_handle()
2440 mutex_lock(&dev->mutex); in input_unregister_handle()
2441 list_del_rcu(&handle->d_node); in input_unregister_handle()
2442 mutex_unlock(&dev->mutex); in input_unregister_handle()
2449 * input_get_new_minor - allocates a new input minor number
2454 * This function allocates a new device minor for from input major namespace.
2463 * This function should be called from input handler's ->connect() in input_get_new_minor()
2483 * input_free_minor - release previously allocated minor
2486 * This function releases previously allocated input minor so that it can be
2510 INPUT_MAX_CHAR_DEVICES, "input"); in input_init()