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
15 #include <linux/input/mt.h>
29 #include "input-compat.h"
30 #include "input-core-private.h"
31 #include "input-poller.h"
34 MODULE_DESCRIPTION("Input core");
48 * input handlers.
71 static int input_defuzz_abs_event(int value, int old_val, int fuzz) in input_defuzz_abs_event() argument
74 if (value > old_val - fuzz / 2 && value < old_val + fuzz / 2) in input_defuzz_abs_event()
77 if (value > old_val - fuzz && value < old_val + fuzz) in input_defuzz_abs_event()
78 return (old_val * 3 + value) / 4; in input_defuzz_abs_event()
80 if (value > old_val - fuzz * 2 && value < old_val + fuzz * 2) in input_defuzz_abs_event()
81 return (old_val + value) / 2; in input_defuzz_abs_event()
84 return value; in input_defuzz_abs_event()
89 if (test_bit(EV_REP, dev->evbit) && in input_start_autorepeat()
90 dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && in input_start_autorepeat()
91 dev->timer.function) { in input_start_autorepeat()
92 dev->repeat_key = code; in input_start_autorepeat()
93 mod_timer(&dev->timer, in input_start_autorepeat()
94 jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); in input_start_autorepeat()
100 timer_delete(&dev->timer); in input_stop_autorepeat()
109 * This function is called with dev->event_lock held and interrupts disabled.
117 lockdep_assert_held(&dev->event_lock); in input_pass_values()
120 handle = rcu_dereference(dev->grab); in input_pass_values()
122 count = handle->handle_events(handle, vals, count); in input_pass_values()
126 list_for_each_entry_rcu(handle, &dev->h_list, d_node) { in input_pass_values()
127 if (handle->open) { in input_pass_values()
128 count = handle->handle_events(handle, vals, in input_pass_values()
137 if (test_bit(EV_REP, dev->evbit) && test_bit(EV_KEY, dev->evbit)) { in input_pass_values()
139 if (v->type == EV_KEY && v->value != 2) { in input_pass_values()
140 if (v->value) in input_pass_values()
141 input_start_autorepeat(dev, v->code); in input_pass_values()
159 struct input_mt *mt = dev->mt; in input_handle_abs_event()
169 if (mt && *pval >= 0 && *pval < mt->num_slots) in input_handle_abs_event()
170 mt->slot = *pval; in input_handle_abs_event()
178 pold = &dev->absinfo[code].value; in input_handle_abs_event()
180 pold = &mt->slots[mt->slot].abs[code - ABS_MT_FIRST]; in input_handle_abs_event()
181 is_new_slot = mt->slot != dev->absinfo[ABS_MT_SLOT].value; in input_handle_abs_event()
184 * Bypass filtering for multi-touch events when in input_handle_abs_event()
192 dev->absinfo[code].fuzz); in input_handle_abs_event()
201 dev->absinfo[ABS_MT_SLOT].value = mt->slot; in input_handle_abs_event()
212 int value = *pval; in input_get_disposition() local
214 /* filter-out events from inhibited devices */ in input_get_disposition()
215 if (dev->inhibited) in input_get_disposition()
236 if (is_event_supported(code, dev->keybit, KEY_MAX)) { in input_get_disposition()
238 /* auto-repeat bypasses state updates */ in input_get_disposition()
239 if (value == 2) { in input_get_disposition()
244 if (!!test_bit(code, dev->key) != !!value) { in input_get_disposition()
246 __change_bit(code, dev->key); in input_get_disposition()
253 if (is_event_supported(code, dev->swbit, SW_MAX) && in input_get_disposition()
254 !!test_bit(code, dev->sw) != !!value) { in input_get_disposition()
256 __change_bit(code, dev->sw); in input_get_disposition()
262 if (is_event_supported(code, dev->absbit, ABS_MAX)) in input_get_disposition()
263 disposition = input_handle_abs_event(dev, code, &value); in input_get_disposition()
268 if (is_event_supported(code, dev->relbit, REL_MAX) && value) in input_get_disposition()
274 if (is_event_supported(code, dev->mscbit, MSC_MAX)) in input_get_disposition()
280 if (is_event_supported(code, dev->ledbit, LED_MAX) && in input_get_disposition()
281 !!test_bit(code, dev->led) != !!value) { in input_get_disposition()
283 __change_bit(code, dev->led); in input_get_disposition()
289 if (is_event_supported(code, dev->sndbit, SND_MAX)) { in input_get_disposition()
291 if (!!test_bit(code, dev->snd) != !!value) in input_get_disposition()
292 __change_bit(code, dev->snd); in input_get_disposition()
298 if (code <= REP_MAX && value >= 0 && dev->rep[code] != value) { in input_get_disposition()
299 dev->rep[code] = value; in input_get_disposition()
305 if (value >= 0) in input_get_disposition()
314 *pval = value; in input_get_disposition()
319 unsigned int type, unsigned int code, int value) in input_event_dispose() argument
321 if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event && dev->ready) in input_event_dispose()
322 dev->event(dev, type, code, value); in input_event_dispose()
328 v = &dev->vals[dev->num_vals++]; in input_event_dispose()
329 v->type = EV_ABS; in input_event_dispose()
330 v->code = ABS_MT_SLOT; in input_event_dispose()
331 v->value = dev->mt->slot; in input_event_dispose()
334 v = &dev->vals[dev->num_vals++]; in input_event_dispose()
335 v->type = type; in input_event_dispose()
336 v->code = code; in input_event_dispose()
337 v->value = value; in input_event_dispose()
341 if (dev->num_vals >= 2) in input_event_dispose()
342 input_pass_values(dev, dev->vals, dev->num_vals); in input_event_dispose()
343 dev->num_vals = 0; in input_event_dispose()
350 dev->timestamp[INPUT_CLK_MONO] = ktime_set(0, 0); in input_event_dispose()
351 } else if (dev->num_vals >= dev->max_vals - 2) { in input_event_dispose()
352 dev->vals[dev->num_vals++] = input_value_sync; in input_event_dispose()
353 input_pass_values(dev, dev->vals, dev->num_vals); in input_event_dispose()
354 dev->num_vals = 0; in input_event_dispose()
359 unsigned int type, unsigned int code, int value) in input_handle_event() argument
363 lockdep_assert_held(&dev->event_lock); in input_handle_event()
365 disposition = input_get_disposition(dev, type, code, &value); in input_handle_event()
368 add_input_randomness(type, code, value); in input_handle_event()
370 input_event_dispose(dev, disposition, type, code, value); in input_handle_event()
375 * input_event() - report new input event
379 * @value: value of the event
381 * This function should be used by drivers implementing various input
382 * devices to report input events. See also input_inject_event().
384 * NOTE: input_event() may be safely used right after input device was
387 * input handlers. Such early invocation of input_event() may be used
392 unsigned int type, unsigned int code, int value) in input_event() argument
394 if (is_event_supported(type, dev->evbit, EV_MAX)) { in input_event()
395 guard(spinlock_irqsave)(&dev->event_lock); in input_event()
396 input_handle_event(dev, type, code, value); in input_event()
402 * input_inject_event() - send input event from input handler
403 * @handle: input handle to send event through
406 * @value: value of the event
413 unsigned int type, unsigned int code, int value) in input_inject_event() argument
415 struct input_dev *dev = handle->dev; in input_inject_event()
418 if (is_event_supported(type, dev->evbit, EV_MAX)) { in input_inject_event()
419 guard(spinlock_irqsave)(&dev->event_lock); in input_inject_event()
422 grab = rcu_dereference(dev->grab); in input_inject_event()
424 input_handle_event(dev, type, code, value); in input_inject_event()
431 * input_alloc_absinfo - allocates array of input_absinfo structs
432 * @dev: the input device emitting absolute events
439 if (dev->absinfo) in input_alloc_absinfo()
442 dev->absinfo = kzalloc_objs(*dev->absinfo, ABS_CNT); in input_alloc_absinfo()
443 if (!dev->absinfo) { in input_alloc_absinfo()
444 dev_err(dev->dev.parent ?: &dev->dev, in input_alloc_absinfo()
448 * input_register_device() when we refuse to register input in input_alloc_absinfo()
460 __set_bit(EV_ABS, dev->evbit); in input_set_abs_params()
461 __set_bit(axis, dev->absbit); in input_set_abs_params()
464 if (!dev->absinfo) in input_set_abs_params()
467 absinfo = &dev->absinfo[axis]; in input_set_abs_params()
468 absinfo->minimum = min; in input_set_abs_params()
469 absinfo->maximum = max; in input_set_abs_params()
470 absinfo->fuzz = fuzz; in input_set_abs_params()
471 absinfo->flat = flat; in input_set_abs_params()
476 * input_copy_abs - Copy absinfo from one input_dev to another
477 * @dst: Destination input device to copy the abs settings to
478 * @dst_axis: ABS_* value selecting the destination axis
479 * @src: Source input device to copy the abs settings from
480 * @src_axis: ABS_* value selecting the source axis
483 * the specified source input device's source axis.
484 * This is useful to e.g. setup a pen/stylus input-device for combined
492 if (WARN_ON(!(test_bit(EV_ABS, src->evbit) && in input_copy_abs()
493 test_bit(src_axis, src->absbit)))) in input_copy_abs()
498 * expected to catch this when registering the input devices, which may in input_copy_abs()
501 if (!src->absinfo) in input_copy_abs()
505 if (!dst->absinfo) in input_copy_abs()
508 dst->absinfo[dst_axis] = src->absinfo[src_axis]; in input_copy_abs()
513 * input_grab_device - grabs device for exclusive use
514 * @handle: input handle that wants to own the device
516 * When a device is grabbed by an input handle all events generated by
518 * by other input handles are ignored while device is grabbed.
522 struct input_dev *dev = handle->dev; in input_grab_device()
524 scoped_cond_guard(mutex_intr, return -EINTR, &dev->mutex) { in input_grab_device()
525 if (dev->grab) in input_grab_device()
526 return -EBUSY; in input_grab_device()
528 rcu_assign_pointer(dev->grab, handle); in input_grab_device()
537 struct input_dev *dev = handle->dev; in __input_release_device()
540 grabber = rcu_dereference_protected(dev->grab, in __input_release_device()
541 lockdep_is_held(&dev->mutex)); in __input_release_device()
543 rcu_assign_pointer(dev->grab, NULL); in __input_release_device()
547 list_for_each_entry(handle, &dev->h_list, d_node) in __input_release_device()
548 if (handle->open && handle->handler->start) in __input_release_device()
549 handle->handler->start(handle); in __input_release_device()
554 * input_release_device - release previously grabbed device
555 * @handle: input handle that owns the device
557 * Releases previously grabbed device so that other input handles can
558 * start receiving input events. Upon release all handlers attached
564 struct input_dev *dev = handle->dev; in input_release_device()
566 guard(mutex)(&dev->mutex); in input_release_device()
576 if (!test_bit(EV_##type, dev->evbit)) \
579 for_each_set_bit(i, dev->bits##bit, type##_CNT) { \
580 active = test_bit(i, dev->bits); \
584 dev->event(dev, EV_##type, i, on ? active : 0); \
589 * Iterate through the logical state of the input device (LEDs, sounds,
590 * auto-repeat) and explicitly push that state down to the hardware
591 * via dev->event() to match the current logical state (if activate is true),
595 * Primarily used as a state-replay mechanism after a device is opened
601 if (!dev->event || !dev->ready) in input_dev_toggle()
607 if (activate && test_bit(EV_REP, dev->evbit)) { in input_dev_toggle()
608 dev->event(dev, EV_REP, REP_PERIOD, dev->rep[REP_PERIOD]); in input_dev_toggle()
609 dev->event(dev, EV_REP, REP_DELAY, dev->rep[REP_DELAY]); in input_dev_toggle()
617 lockdep_assert_held(&dev->mutex); in input_start_device()
619 if (dev->users++ == 0 && !dev->inhibited) { in input_start_device()
620 if (dev->open) { in input_start_device()
621 error = dev->open(dev); in input_start_device()
623 dev->users--; in input_start_device()
628 scoped_guard(spinlock_irq, &dev->event_lock) { in input_start_device()
629 dev->ready = true; in input_start_device()
633 if (dev->poller) in input_start_device()
634 input_dev_poller_start(dev->poller); in input_start_device()
641 * input_open_device - open input device
644 * This function should be called by input handlers when they
645 * want to start receive events from given input device.
649 struct input_dev *dev = handle->dev; in input_open_device()
652 scoped_cond_guard(mutex_intr, return -EINTR, &dev->mutex) { in input_open_device()
653 if (dev->going_away) in input_open_device()
654 return -ENODEV; in input_open_device()
656 handle->open++; in input_open_device()
658 if (!handle->handler->passive_observer) { in input_open_device()
661 handle->open--; in input_open_device()
671 if (handle->open == 1 && handle->handler->start) in input_open_device()
672 handle->handler->start(handle); in input_open_device()
681 struct input_dev *dev = handle->dev; in input_flush_device()
683 scoped_cond_guard(mutex_intr, return -EINTR, &dev->mutex) { in input_flush_device()
684 if (dev->flush) in input_flush_device()
685 return dev->flush(dev, file); in input_flush_device()
693 * input_close_device - close input device
696 * This function should be called by input handlers when they
697 * want to stop receive events from given input device.
701 struct input_dev *dev = handle->dev; in input_close_device()
703 guard(mutex)(&dev->mutex); in input_close_device()
707 if (!handle->handler->passive_observer) { in input_close_device()
708 if (!--dev->users && !dev->inhibited) { in input_close_device()
709 if (dev->poller) in input_close_device()
710 input_dev_poller_stop(dev->poller); in input_close_device()
712 scoped_guard(spinlock_irq, &dev->event_lock) { in input_close_device()
714 dev->ready = false; in input_close_device()
717 if (dev->close) in input_close_device()
718 dev->close(dev); in input_close_device()
722 if (!--handle->open) { in input_close_device()
725 * completed and that no more input events are delivered in input_close_device()
735 * The function must be called with dev->event_lock held.
742 lockdep_assert_held(&dev->event_lock); in input_dev_release_keys()
744 if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) { in input_dev_release_keys()
745 for_each_set_bit(code, dev->key, KEY_CNT) { in input_dev_release_keys()
762 * Mark device as going away. Note that we take dev->mutex here in input_disconnect_device()
763 * not to protect access to dev->going_away but rather to ensure in input_disconnect_device()
766 scoped_guard(mutex, &dev->mutex) in input_disconnect_device()
767 dev->going_away = true; in input_disconnect_device()
769 guard(spinlock_irq)(&dev->event_lock); in input_disconnect_device()
780 list_for_each_entry(handle, &dev->h_list, d_node) in input_disconnect_device()
781 handle->open = 0; in input_disconnect_device()
785 * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry
797 switch (ke->len) { in input_scancode_to_scalar()
799 *scancode = *((u8 *)ke->scancode); in input_scancode_to_scalar()
803 *scancode = *((u16 *)ke->scancode); in input_scancode_to_scalar()
807 *scancode = *((u32 *)ke->scancode); in input_scancode_to_scalar()
811 return -EINVAL; in input_scancode_to_scalar()
826 switch (dev->keycodesize) { in input_fetch_keycode()
828 return ((u8 *)dev->keycode)[index]; in input_fetch_keycode()
831 return ((u16 *)dev->keycode)[index]; in input_fetch_keycode()
834 return ((u32 *)dev->keycode)[index]; in input_fetch_keycode()
844 if (!dev->keycodesize) in input_default_getkeycode()
845 return -EINVAL; in input_default_getkeycode()
847 if (ke->flags & INPUT_KEYMAP_BY_INDEX) in input_default_getkeycode()
848 index = ke->index; in input_default_getkeycode()
855 if (index >= dev->keycodemax) in input_default_getkeycode()
856 return -EINVAL; in input_default_getkeycode()
858 ke->keycode = input_fetch_keycode(dev, index); in input_default_getkeycode()
859 ke->index = index; in input_default_getkeycode()
860 ke->len = sizeof(index); in input_default_getkeycode()
861 memcpy(ke->scancode, &index, sizeof(index)); in input_default_getkeycode()
867 * input_default_setkeycode - default setkeycode method
868 * @dev: input device which keymap is being updated.
888 lockdep_assert_held(&dev->event_lock); in input_default_setkeycode()
890 if (!dev->keycodesize) in input_default_setkeycode()
891 return -EINVAL; in input_default_setkeycode()
893 if (ke->flags & INPUT_KEYMAP_BY_INDEX) { in input_default_setkeycode()
894 index = ke->index; in input_default_setkeycode()
901 if (index >= dev->keycodemax) in input_default_setkeycode()
902 return -EINVAL; in input_default_setkeycode()
904 if (dev->keycodesize < sizeof(ke->keycode) && in input_default_setkeycode()
905 (ke->keycode >> (dev->keycodesize * 8))) in input_default_setkeycode()
906 return -EINVAL; in input_default_setkeycode()
908 switch (dev->keycodesize) { in input_default_setkeycode()
910 u8 *k = (u8 *)dev->keycode; in input_default_setkeycode()
912 k[index] = ke->keycode; in input_default_setkeycode()
916 u16 *k = (u16 *)dev->keycode; in input_default_setkeycode()
918 k[index] = ke->keycode; in input_default_setkeycode()
922 u32 *k = (u32 *)dev->keycode; in input_default_setkeycode()
924 k[index] = ke->keycode; in input_default_setkeycode()
930 __clear_bit(*old_keycode, dev->keybit); in input_default_setkeycode()
931 for (i = 0; i < dev->keycodemax; i++) { in input_default_setkeycode()
933 __set_bit(*old_keycode, dev->keybit); in input_default_setkeycode()
940 __set_bit(ke->keycode, dev->keybit); in input_default_setkeycode()
946 * input_get_keycode - retrieve keycode currently mapped to a given scancode
947 * @dev: input device which keymap is being queried
955 guard(spinlock_irqsave)(&dev->event_lock); in input_get_keycode()
957 return dev->getkeycode(dev, ke); in input_get_keycode()
962 * input_set_keycode - attribute a keycode to a given scancode
963 * @dev: input device which keymap is being updated
975 if (ke->keycode > KEY_MAX) in input_set_keycode()
976 return -EINVAL; in input_set_keycode()
978 guard(spinlock_irqsave)(&dev->event_lock); in input_set_keycode()
980 error = dev->setkeycode(dev, ke, &old_keycode); in input_set_keycode()
985 __clear_bit(KEY_RESERVED, dev->keybit); in input_set_keycode()
992 dev_warn(dev->dev.parent ?: &dev->dev, in input_set_keycode()
995 } else if (test_bit(EV_KEY, dev->evbit) && in input_set_keycode()
996 !is_event_supported(old_keycode, dev->keybit, KEY_MAX) && in input_set_keycode()
997 __test_and_clear_bit(old_keycode, dev->key)) { in input_set_keycode()
1017 if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) in input_match_device_id()
1018 if (id->bustype != dev->id.bustype) in input_match_device_id()
1021 if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) in input_match_device_id()
1022 if (id->vendor != dev->id.vendor) in input_match_device_id()
1025 if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) in input_match_device_id()
1026 if (id->product != dev->id.product) in input_match_device_id()
1029 if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) in input_match_device_id()
1030 if (id->version != dev->id.version) in input_match_device_id()
1033 if (!bitmap_subset(id->evbit, dev->evbit, EV_MAX) || in input_match_device_id()
1034 !bitmap_subset(id->keybit, dev->keybit, KEY_MAX) || in input_match_device_id()
1035 !bitmap_subset(id->relbit, dev->relbit, REL_MAX) || in input_match_device_id()
1036 !bitmap_subset(id->absbit, dev->absbit, ABS_MAX) || in input_match_device_id()
1037 !bitmap_subset(id->mscbit, dev->mscbit, MSC_MAX) || in input_match_device_id()
1038 !bitmap_subset(id->ledbit, dev->ledbit, LED_MAX) || in input_match_device_id()
1039 !bitmap_subset(id->sndbit, dev->sndbit, SND_MAX) || in input_match_device_id()
1040 !bitmap_subset(id->ffbit, dev->ffbit, FF_MAX) || in input_match_device_id()
1041 !bitmap_subset(id->swbit, dev->swbit, SW_MAX) || in input_match_device_id()
1042 !bitmap_subset(id->propbit, dev->propbit, INPUT_PROP_MAX)) { in input_match_device_id()
1055 for (id = handler->id_table; id->flags; id++) { in input_match_device()
1057 (!handler->match || handler->match(handler, dev))) { in input_match_device()
1072 return -ENODEV; in input_attach_handler()
1074 error = handler->connect(handler, dev, id); in input_attach_handler()
1075 if (error && error != -ENODEV) in input_attach_handler()
1077 handler->name, kobject_name(&dev->dev.kobj), error); in input_attach_handler()
1102 struct seq_file *seq = file->private_data; in input_proc_devices_poll()
1103 struct input_seq_state *state = seq->private; in input_proc_devices_poll()
1106 if (state->input_devices_state != input_devices_state) { in input_proc_devices_poll()
1107 state->input_devices_state = input_devices_state; in input_proc_devices_poll()
1116 struct input_seq_state *state = seq->private; in input_devices_seq_start()
1121 state->mutex_acquired = false; in input_devices_seq_start()
1125 state->mutex_acquired = true; in input_devices_seq_start()
1137 struct input_seq_state *state = seq->private; in input_seq_stop()
1139 if (state->mutex_acquired) in input_seq_stop()
1152 for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { in input_seq_print_bitmap()
1172 const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); in input_devices_seq_show()
1176 dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); in input_devices_seq_show()
1178 seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); in input_devices_seq_show()
1179 seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); in input_devices_seq_show()
1181 seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : ""); in input_devices_seq_show()
1184 list_for_each_entry(handle, &dev->h_list, d_node) in input_devices_seq_show()
1185 seq_printf(seq, "%s ", handle->name); in input_devices_seq_show()
1188 input_seq_print_bitmap(seq, "PROP", dev->propbit, INPUT_PROP_MAX); in input_devices_seq_show()
1190 input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); in input_devices_seq_show()
1191 if (test_bit(EV_KEY, dev->evbit)) in input_devices_seq_show()
1192 input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); in input_devices_seq_show()
1193 if (test_bit(EV_REL, dev->evbit)) in input_devices_seq_show()
1194 input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); in input_devices_seq_show()
1195 if (test_bit(EV_ABS, dev->evbit)) in input_devices_seq_show()
1196 input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); in input_devices_seq_show()
1197 if (test_bit(EV_MSC, dev->evbit)) in input_devices_seq_show()
1198 input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); in input_devices_seq_show()
1199 if (test_bit(EV_LED, dev->evbit)) in input_devices_seq_show()
1200 input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); in input_devices_seq_show()
1201 if (test_bit(EV_SND, dev->evbit)) in input_devices_seq_show()
1202 input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); in input_devices_seq_show()
1203 if (test_bit(EV_FF, dev->evbit)) in input_devices_seq_show()
1204 input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); in input_devices_seq_show()
1205 if (test_bit(EV_SW, dev->evbit)) in input_devices_seq_show()
1206 input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); in input_devices_seq_show()
1237 struct input_seq_state *state = seq->private; in input_handlers_seq_start()
1242 state->mutex_acquired = false; in input_handlers_seq_start()
1246 state->mutex_acquired = true; in input_handlers_seq_start()
1247 state->pos = *pos; in input_handlers_seq_start()
1254 struct input_seq_state *state = seq->private; in input_handlers_seq_next()
1256 state->pos = *pos + 1; in input_handlers_seq_next()
1263 struct input_seq_state *state = seq->private; in input_handlers_seq_show()
1265 seq_printf(seq, "N: Number=%u Name=%s", state->pos, handler->name); in input_handlers_seq_show()
1266 if (handler->filter) in input_handlers_seq_show()
1268 if (handler->legacy_minors) in input_handlers_seq_show()
1269 seq_printf(seq, " Minor=%d", handler->minor); in input_handlers_seq_show()
1299 proc_bus_input_dir = proc_mkdir("bus/input", NULL); in input_proc_init()
1301 return -ENOMEM; in input_proc_init()
1316 fail1: remove_proc_entry("bus/input", NULL); in input_proc_init()
1317 return -ENOMEM; in input_proc_init()
1324 remove_proc_entry("bus/input", NULL); in input_proc_exit()
1341 input_dev->name ? input_dev->name : ""); \
1358 len += snprintf(buf + len, max(size - len, 0), "%X,", bit); in input_print_modalias_bits()
1368 "input:b%04Xv%04Xp%04Xe%04X-", in input_print_modalias_parts()
1369 id->id.bustype, id->id.vendor, in input_print_modalias_parts()
1370 id->id.product, id->id.version); in input_print_modalias_parts()
1372 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias_parts()
1373 'e', id->evbit, 0, EV_MAX); in input_print_modalias_parts()
1379 space = max(size - (len + 1), 0); in input_print_modalias_parts()
1381 klen = input_print_modalias_bits(buf + len, size - len, in input_print_modalias_parts()
1382 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); in input_print_modalias_parts()
1395 remainder = full_len - len; in input_print_modalias_parts()
1400 if (remainder <= space - 3) { in input_print_modalias_parts()
1406 for (int i = size - 1 - remainder - 3; i >= 0; i--) { in input_print_modalias_parts()
1416 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias_parts()
1417 'r', id->relbit, 0, REL_MAX); in input_print_modalias_parts()
1418 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias_parts()
1419 'a', id->absbit, 0, ABS_MAX); in input_print_modalias_parts()
1420 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias_parts()
1421 'm', id->mscbit, 0, MSC_MAX); in input_print_modalias_parts()
1422 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias_parts()
1423 'l', id->ledbit, 0, LED_MAX); in input_print_modalias_parts()
1424 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias_parts()
1425 's', id->sndbit, 0, SND_MAX); in input_print_modalias_parts()
1426 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias_parts()
1427 'f', id->ffbit, 0, FF_MAX); in input_print_modalias_parts()
1428 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias_parts()
1429 'w', id->swbit, 0, SW_MAX); in input_print_modalias_parts()
1458 if (len < PAGE_SIZE - 2) in input_dev_show_modalias()
1459 len += snprintf(buf + len, PAGE_SIZE - len, "\n"); in input_dev_show_modalias()
1473 int len = input_print_bitmap(buf, PAGE_SIZE, input_dev->propbit, in input_dev_show_properties()
1488 return sysfs_emit(buf, "%d\n", input_dev->inhibited); in inhibited_show()
1500 return -EINVAL; in inhibited_store()
1535 return sysfs_emit(buf, "%04x\n", input_dev->id.name); \
1564 for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { in input_print_bitmap()
1565 len += input_bits_to_string(buf + len, max(buf_size - len, 0), in input_print_bitmap()
1570 len += snprintf(buf + len, max(buf_size - len, 0), " "); in input_print_bitmap()
1581 len += snprintf(buf + len, max(buf_size - len, 0), "\n"); in input_print_bitmap()
1593 input_dev->bm##bit, ev##_MAX, \
1641 kfree(dev->poller); in input_dev_release()
1642 kfree(dev->absinfo); in input_dev_release()
1643 kfree(dev->vals); in input_dev_release()
1650 * Input uevent interface - loading event handlers based on
1659 return -ENOMEM; in input_add_uevent_bm_var()
1661 len = input_print_bitmap(&env->buf[env->buflen - 1], in input_add_uevent_bm_var()
1662 sizeof(env->buf) - env->buflen, in input_add_uevent_bm_var()
1664 if (len >= (sizeof(env->buf) - env->buflen)) in input_add_uevent_bm_var()
1665 return -ENOMEM; in input_add_uevent_bm_var()
1667 env->buflen += len; in input_add_uevent_bm_var()
1675 * avoid overflows/-ENOMEM elsewhere. To work around this let's artificially
1680 * SEQNUM=18446744073709551615 - (%llu - 28 bytes)
1684 * 68 bytes total. Allow extra buffer - 96 bytes
1694 return -ENOMEM; in input_add_uevent_modalias_var()
1696 len = input_print_modalias(&env->buf[env->buflen - 1], in input_add_uevent_modalias_var()
1697 (int)sizeof(env->buf) - env->buflen - in input_add_uevent_modalias_var()
1700 if (len >= ((int)sizeof(env->buf) - env->buflen - in input_add_uevent_modalias_var()
1702 return -ENOMEM; in input_add_uevent_modalias_var()
1704 env->buflen += len; in input_add_uevent_modalias_var()
1734 dev->id.bustype, dev->id.vendor, in input_dev_uevent()
1735 dev->id.product, dev->id.version); in input_dev_uevent()
1736 if (dev->name) in input_dev_uevent()
1737 INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); in input_dev_uevent()
1738 if (dev->phys) in input_dev_uevent()
1739 INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); in input_dev_uevent()
1740 if (dev->uniq) in input_dev_uevent()
1741 INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); in input_dev_uevent()
1743 INPUT_ADD_HOTPLUG_BM_VAR("PROP=", dev->propbit, INPUT_PROP_MAX); in input_dev_uevent()
1745 INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); in input_dev_uevent()
1746 if (test_bit(EV_KEY, dev->evbit)) in input_dev_uevent()
1747 INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); in input_dev_uevent()
1748 if (test_bit(EV_REL, dev->evbit)) in input_dev_uevent()
1749 INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); in input_dev_uevent()
1750 if (test_bit(EV_ABS, dev->evbit)) in input_dev_uevent()
1751 INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); in input_dev_uevent()
1752 if (test_bit(EV_MSC, dev->evbit)) in input_dev_uevent()
1753 INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); in input_dev_uevent()
1754 if (test_bit(EV_LED, dev->evbit)) in input_dev_uevent()
1755 INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); in input_dev_uevent()
1756 if (test_bit(EV_SND, dev->evbit)) in input_dev_uevent()
1757 INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); in input_dev_uevent()
1758 if (test_bit(EV_FF, dev->evbit)) in input_dev_uevent()
1759 INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); in input_dev_uevent()
1760 if (test_bit(EV_SW, dev->evbit)) in input_dev_uevent()
1761 INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); in input_dev_uevent()
1769 * input_reset_device() - reset/restore the state of input device
1770 * @dev: input device whose state needs to be reset
1772 * This function tries to reset the state of an opened input device and
1778 guard(mutex)(&dev->mutex); in input_reset_device()
1779 guard(spinlock_irqsave)(&dev->event_lock); in input_reset_device()
1789 guard(mutex)(&dev->mutex); in input_inhibit_device()
1791 if (dev->going_away) in input_inhibit_device()
1792 return -ENODEV; in input_inhibit_device()
1794 if (dev->inhibited) in input_inhibit_device()
1797 if (dev->users) { in input_inhibit_device()
1798 if (dev->poller) in input_inhibit_device()
1799 input_dev_poller_stop(dev->poller); in input_inhibit_device()
1801 scoped_guard(spinlock_irq, &dev->event_lock) { in input_inhibit_device()
1803 dev->ready = false; in input_inhibit_device()
1806 if (dev->close) in input_inhibit_device()
1807 dev->close(dev); in input_inhibit_device()
1810 scoped_guard(spinlock_irq, &dev->event_lock) { in input_inhibit_device()
1814 dev->inhibited = true; in input_inhibit_device()
1825 guard(mutex)(&dev->mutex); in input_uninhibit_device()
1827 if (dev->going_away) in input_uninhibit_device()
1828 return -ENODEV; in input_uninhibit_device()
1830 if (!dev->inhibited) in input_uninhibit_device()
1833 dev->inhibited = false; in input_uninhibit_device()
1835 if (dev->users) { in input_uninhibit_device()
1836 if (dev->open) { in input_uninhibit_device()
1837 error = dev->open(dev); in input_uninhibit_device()
1839 dev->inhibited = true; in input_uninhibit_device()
1843 scoped_guard(spinlock_irq, &dev->event_lock) in input_uninhibit_device()
1844 dev->ready = true; in input_uninhibit_device()
1847 scoped_guard(spinlock_irq, &dev->event_lock) in input_uninhibit_device()
1850 if (dev->users && dev->poller) in input_uninhibit_device()
1851 input_dev_poller_start(dev->poller); in input_uninhibit_device()
1853 list_for_each_entry(handle, &dev->h_list, d_node) { in input_uninhibit_device()
1854 if (handle->open && handle->handler->start) in input_uninhibit_device()
1855 handle->handler->start(handle); in input_uninhibit_device()
1865 guard(spinlock_irq)(&input_dev->event_lock); in input_dev_suspend()
1884 guard(spinlock_irq)(&input_dev->event_lock); in input_dev_resume()
1896 guard(spinlock_irq)(&input_dev->event_lock); in input_dev_freeze()
1912 guard(spinlock_irq)(&input_dev->event_lock); in input_dev_poweroff()
1937 return kasprintf(GFP_KERNEL, "input/%s", dev_name(dev)); in input_devnode()
1941 .name = "input",
1947 * input_allocate_device - allocate memory for new input device
1957 static atomic_t input_no = ATOMIC_INIT(-1); in input_allocate_device()
1969 dev->max_vals = 10; in input_allocate_device()
1970 dev->vals = kzalloc_objs(*dev->vals, dev->max_vals); in input_allocate_device()
1971 if (!dev->vals) { in input_allocate_device()
1976 mutex_init(&dev->mutex); in input_allocate_device()
1977 spin_lock_init(&dev->event_lock); in input_allocate_device()
1978 timer_setup(&dev->timer, NULL, 0); in input_allocate_device()
1979 INIT_LIST_HEAD(&dev->h_list); in input_allocate_device()
1980 INIT_LIST_HEAD(&dev->node); in input_allocate_device()
1982 dev->dev.type = &input_dev_type; in input_allocate_device()
1983 dev->dev.class = &input_class; in input_allocate_device()
1984 device_initialize(&dev->dev); in input_allocate_device()
1988 * resources associated with the input device. in input_allocate_device()
1991 dev_set_name(&dev->dev, "input%lu", in input_allocate_device()
2001 struct input_dev *input; member
2008 return devres->input == data; in devm_input_device_match()
2014 struct input_dev *input = devres->input; in devm_input_device_release() local
2017 __func__, dev_name(&input->dev)); in devm_input_device_release()
2018 input_put_device(input); in devm_input_device_release()
2022 * devm_input_allocate_device - allocate managed input device
2023 * @dev: device owning the input device being created
2027 * Managed input devices do not need to be explicitly unregistered or
2029 * its driver (or binding fails). Once managed input device is allocated,
2031 * input device. There are no special devm_input_device_[un]register()
2033 * should you need them. In most cases however, managed input device need
2036 * NOTE: the owner device is set up as parent of input device and users
2041 struct input_dev *input; in devm_input_allocate_device() local
2049 input = input_allocate_device(); in devm_input_allocate_device()
2050 if (!input) { in devm_input_allocate_device()
2055 input->dev.parent = dev; in devm_input_allocate_device()
2056 input->devres_managed = true; in devm_input_allocate_device()
2058 devres->input = input; in devm_input_allocate_device()
2061 return input; in devm_input_allocate_device()
2066 * input_free_device - free memory occupied by input_dev structure
2067 * @dev: input device to free
2076 * NOTE: If there are references to the input device then memory
2082 if (dev->devres_managed) in input_free_device()
2083 WARN_ON(devres_destroy(dev->dev.parent, in input_free_device()
2093 * input_set_timestamp - set timestamp for input events
2094 * @dev: input device to set timestamp for
2098 * This function is intended to provide to the input system a more
2108 dev->timestamp[INPUT_CLK_MONO] = timestamp; in input_set_timestamp()
2109 dev->timestamp[INPUT_CLK_REAL] = ktime_mono_to_real(timestamp); in input_set_timestamp()
2110 dev->timestamp[INPUT_CLK_BOOT] = ktime_mono_to_any(timestamp, in input_set_timestamp()
2116 * input_get_timestamp - get timestamp for input events
2117 * @dev: input device to get timestamp from
2119 * A valid timestamp is a timestamp of non-zero value.
2125 if (!ktime_compare(dev->timestamp[INPUT_CLK_MONO], invalid_timestamp)) in input_get_timestamp()
2128 return dev->timestamp; in input_get_timestamp()
2133 * input_set_capability - mark device as capable of a certain event
2139 * bitmap the function also adjusts dev->evbit.
2153 __set_bit(code, dev->keybit); in input_set_capability()
2157 __set_bit(code, dev->relbit); in input_set_capability()
2162 __set_bit(code, dev->absbit); in input_set_capability()
2166 __set_bit(code, dev->mscbit); in input_set_capability()
2170 __set_bit(code, dev->swbit); in input_set_capability()
2174 __set_bit(code, dev->ledbit); in input_set_capability()
2178 __set_bit(code, dev->sndbit); in input_set_capability()
2182 __set_bit(code, dev->ffbit); in input_set_capability()
2195 __set_bit(type, dev->evbit); in input_set_capability()
2205 if (dev->mt) { in input_estimate_events_per_packet()
2206 mt_slots = dev->mt->num_slots; in input_estimate_events_per_packet()
2207 } else if (test_bit(ABS_MT_TRACKING_ID, dev->absbit)) { in input_estimate_events_per_packet()
2208 mt_slots = dev->absinfo[ABS_MT_TRACKING_ID].maximum - in input_estimate_events_per_packet()
2209 dev->absinfo[ABS_MT_TRACKING_ID].minimum + 1; in input_estimate_events_per_packet()
2211 } else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) { in input_estimate_events_per_packet()
2219 if (test_bit(EV_ABS, dev->evbit)) in input_estimate_events_per_packet()
2220 for_each_set_bit(i, dev->absbit, ABS_CNT) in input_estimate_events_per_packet()
2223 if (test_bit(EV_REL, dev->evbit)) in input_estimate_events_per_packet()
2224 events += bitmap_weight(dev->relbit, REL_CNT); in input_estimate_events_per_packet()
2234 if (!test_bit(EV_##type, dev->evbit)) \
2235 memset(dev->bits##bit, 0, \
2236 sizeof(dev->bits##bit)); \
2258 list_for_each_entry_safe(handle, next, &dev->h_list, d_node) in __input_unregister_device()
2259 handle->handler->disconnect(handle); in __input_unregister_device()
2260 WARN_ON(!list_empty(&dev->h_list)); in __input_unregister_device()
2262 timer_delete_sync(&dev->timer); in __input_unregister_device()
2263 list_del_init(&dev->node); in __input_unregister_device()
2268 if (dev->ff && dev->ff->stop) in __input_unregister_device()
2269 dev->ff->stop(dev->ff); in __input_unregister_device()
2271 device_del(&dev->dev); in __input_unregister_device()
2277 struct input_dev *input = devres->input; in devm_input_device_unregister() local
2280 __func__, dev_name(&input->dev)); in devm_input_device_unregister()
2281 __input_unregister_device(input); in devm_input_device_unregister()
2286 * dev->event_lock here to avoid racing with input_event
2293 guard(spinlock_irqsave)(&dev->event_lock); in input_repeat_key()
2295 if (!dev->inhibited && in input_repeat_key()
2296 test_bit(dev->repeat_key, dev->key) && in input_repeat_key()
2297 is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) { in input_repeat_key()
2300 input_handle_event(dev, EV_KEY, dev->repeat_key, 2); in input_repeat_key()
2303 if (dev->rep[REP_PERIOD]) in input_repeat_key()
2304 mod_timer(&dev->timer, jiffies + in input_repeat_key()
2305 msecs_to_jiffies(dev->rep[REP_PERIOD])); in input_repeat_key()
2310 * input_enable_softrepeat - enable software autorepeat
2311 * @dev: input device
2315 * Enable software autorepeat on the input device.
2319 dev->timer.function = input_repeat_key; in input_enable_softrepeat()
2320 dev->rep[REP_DELAY] = delay; in input_enable_softrepeat()
2321 dev->rep[REP_PERIOD] = period; in input_enable_softrepeat()
2327 lockdep_assert_held(&dev->mutex); in input_device_enabled()
2329 return !dev->inhibited && dev->users > 0; in input_device_enabled()
2340 if (dev->hint_events_per_packet < packet_size) in input_device_tune_vals()
2341 dev->hint_events_per_packet = packet_size; in input_device_tune_vals()
2343 max_vals = dev->hint_events_per_packet + 2; in input_device_tune_vals()
2344 if (dev->max_vals >= max_vals) in input_device_tune_vals()
2349 return -ENOMEM; in input_device_tune_vals()
2351 scoped_guard(spinlock_irq, &dev->event_lock) { in input_device_tune_vals()
2352 dev->max_vals = max_vals; in input_device_tune_vals()
2353 swap(dev->vals, vals); in input_device_tune_vals()
2363 * input_register_device - register device with input core
2366 * This function registers device with input core. The device must be
2374 * Note that this function is also used to register managed input devices
2375 * (ones allocated with devm_input_allocate_device()). Such managed input
2378 * that tear down of managed input devices is internally a 2-step process:
2379 * registered managed input device is first unregistered, but stays in
2381 * not be delivered anywhere). The freeing of managed input device will
2392 if (test_bit(EV_ABS, dev->evbit) && !dev->absinfo) { in input_register_device()
2393 dev_err(&dev->dev, in input_register_device()
2394 "Absolute device without dev->absinfo, refusing to register\n"); in input_register_device()
2395 return -EINVAL; in input_register_device()
2398 if (dev->devres_managed) { in input_register_device()
2402 return -ENOMEM; in input_register_device()
2404 devres->input = dev; in input_register_device()
2407 /* Every input device generates EV_SYN/SYN_REPORT events. */ in input_register_device()
2408 __set_bit(EV_SYN, dev->evbit); in input_register_device()
2411 __clear_bit(KEY_RESERVED, dev->keybit); in input_register_device()
2413 /* Make sure that bitmasks not mentioned in dev->evbit are clean. */ in input_register_device()
2421 * If delay and period are pre-set by the driver, then autorepeating in input_register_device()
2422 * is handled by the driver itself and we don't do it in input.c. in input_register_device()
2424 if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) in input_register_device()
2427 if (!dev->getkeycode) in input_register_device()
2428 dev->getkeycode = input_default_getkeycode; in input_register_device()
2430 if (!dev->setkeycode) in input_register_device()
2431 dev->setkeycode = input_default_setkeycode; in input_register_device()
2433 if (dev->poller) in input_register_device()
2434 input_dev_poller_finalize(dev->poller); in input_register_device()
2436 error = device_add(&dev->dev); in input_register_device()
2440 path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); in input_register_device()
2442 dev->name ? dev->name : "Unspecified device", in input_register_device()
2446 error = -EINTR; in input_register_device()
2448 list_add_tail(&dev->node, &input_dev_list); in input_register_device()
2456 if (dev->devres_managed) { in input_register_device()
2457 dev_dbg(dev->dev.parent, "%s: registering %s with devres.\n", in input_register_device()
2458 __func__, dev_name(&dev->dev)); in input_register_device()
2459 devres_add(dev->dev.parent, devres); in input_register_device()
2464 device_del(&dev->dev); in input_register_device()
2472 * input_unregister_device - unregister previously registered device
2475 * This function unregisters an input device. Once device is unregistered
2480 if (dev->devres_managed) { in input_unregister_device()
2481 WARN_ON(devres_destroy(dev->dev.parent, in input_unregister_device()
2501 if (handler->filter) in input_handler_check_methods()
2503 if (handler->events) in input_handler_check_methods()
2505 if (handler->event) in input_handler_check_methods()
2510 __func__, handler->name); in input_handler_check_methods()
2511 return -EINVAL; in input_handler_check_methods()
2518 * input_register_handler - register a new input handler
2521 * This function registers a new input handler (interface) for input
2522 * devices in the system and attaches it to all input devices that
2534 scoped_cond_guard(mutex_intr, return -EINTR, &input_mutex) { in input_register_handler()
2535 INIT_LIST_HEAD(&handler->h_list); in input_register_handler()
2537 list_add_tail(&handler->node, &input_handler_list); in input_register_handler()
2550 * input_unregister_handler - unregisters an input handler
2553 * This function disconnects a handler from its input devices and
2562 list_for_each_entry_safe(handle, next, &handler->h_list, h_node) in input_unregister_handler()
2563 handler->disconnect(handle); in input_unregister_handler()
2564 WARN_ON(!list_empty(&handler->h_list)); in input_unregister_handler()
2566 list_del_init(&handler->node); in input_unregister_handler()
2573 * input_handler_for_each_handle - handle iterator
2574 * @handler: input handler to iterate
2579 * it @data and stop when @fn returns a non-zero value. The function is
2592 list_for_each_entry_rcu(handle, &handler->h_list, h_node) { in input_handler_for_each_handle()
2604 * invokes handler->event() method for each event one by one.
2610 struct input_handler *handler = handle->handler; in input_handle_events_default()
2614 handler->event(handle, v->type, v->code, v->value); in input_handle_events_default()
2621 * handler->filter() method for each event one by one and removes events
2628 struct input_handler *handler = handle->handler; in input_handle_events_filter()
2633 if (handler->filter(handle, v->type, v->code, v->value)) in input_handle_events_filter()
2640 return end - vals; in input_handle_events_filter()
2654 * Sets up appropriate handle->event_handler based on the input_handler
2659 struct input_handler *handler = handle->handler; in input_handle_setup_event_handler()
2661 if (handler->filter) in input_handle_setup_event_handler()
2662 handle->handle_events = input_handle_events_filter; in input_handle_setup_event_handler()
2663 else if (handler->event) in input_handle_setup_event_handler()
2664 handle->handle_events = input_handle_events_default; in input_handle_setup_event_handler()
2665 else if (handler->events) in input_handle_setup_event_handler()
2666 handle->handle_events = handler->events; in input_handle_setup_event_handler()
2668 handle->handle_events = input_handle_events_null; in input_handle_setup_event_handler()
2672 * input_register_handle - register a new input handle
2675 * This function puts a new input handle onto device's
2684 struct input_handler *handler = handle->handler; in input_register_handle()
2685 struct input_dev *dev = handle->dev; in input_register_handle()
2689 * We take dev->mutex here to prevent race with in input_register_handle()
2692 scoped_cond_guard(mutex_intr, return -EINTR, &dev->mutex) { in input_register_handle()
2697 if (handler->filter) in input_register_handle()
2698 list_add_rcu(&handle->d_node, &dev->h_list); in input_register_handle()
2700 list_add_tail_rcu(&handle->d_node, &dev->h_list); in input_register_handle()
2704 * Since we are supposed to be called from ->connect() in input_register_handle()
2705 * which is mutually exclusive with ->disconnect() in input_register_handle()
2709 list_add_tail_rcu(&handle->h_node, &handler->h_list); in input_register_handle()
2716 * input_unregister_handle - unregister an input handle
2719 * This function removes input handle from device's
2727 struct input_dev *dev = handle->dev; in input_unregister_handle()
2729 list_del_rcu(&handle->h_node); in input_unregister_handle()
2732 * Take dev->mutex to prevent race with input_release_device(). in input_unregister_handle()
2734 scoped_guard(mutex, &dev->mutex) in input_unregister_handle()
2735 list_del_rcu(&handle->d_node); in input_unregister_handle()
2742 * input_get_new_minor - allocates a new input minor number
2747 * This function allocates a new device minor for from input major namespace.
2756 * This function should be called from input handler's ->connect() in input_get_new_minor()
2762 legacy_base + legacy_num - 1, in input_get_new_minor()
2769 INPUT_MAX_CHAR_DEVICES - 1, GFP_KERNEL); in input_get_new_minor()
2774 * input_free_minor - release previously allocated minor
2777 * This function releases previously allocated input minor so that it can be
2801 INPUT_MAX_CHAR_DEVICES, "input"); in input_init()