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-core-private.h"
28 #include "input-poller.h"
31 MODULE_DESCRIPTION("Input core");
45 * input handlers.
68 static int input_defuzz_abs_event(int value, int old_val, int fuzz) in input_defuzz_abs_event() argument
71 if (value > old_val - fuzz / 2 && value < old_val + fuzz / 2) in input_defuzz_abs_event()
74 if (value > old_val - fuzz && value < old_val + fuzz) in input_defuzz_abs_event()
75 return (old_val * 3 + value) / 4; in input_defuzz_abs_event()
77 if (value > old_val - fuzz * 2 && value < old_val + fuzz * 2) in input_defuzz_abs_event()
78 return (old_val + value) / 2; in input_defuzz_abs_event()
81 return value; in input_defuzz_abs_event()
86 if (test_bit(EV_REP, dev->evbit) && in input_start_autorepeat()
87 dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && in input_start_autorepeat()
88 dev->timer.function) { in input_start_autorepeat()
89 dev->repeat_key = code; in input_start_autorepeat()
90 mod_timer(&dev->timer, in input_start_autorepeat()
91 jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); in input_start_autorepeat()
97 del_timer(&dev->timer); in input_stop_autorepeat()
103 * dev->event_lock held and interrupts disabled.
108 struct input_handler *handler = handle->handler; in input_to_handler()
112 if (handler->filter) { in input_to_handler()
114 if (handler->filter(handle, v->type, v->code, v->value)) in input_to_handler()
120 count = end - vals; in input_to_handler()
126 if (handler->events) in input_to_handler()
127 handler->events(handle, vals, count); in input_to_handler()
128 else if (handler->event) in input_to_handler()
130 handler->event(handle, v->type, v->code, v->value); in input_to_handler()
138 * dev->event_lock held and interrupts disabled.
146 lockdep_assert_held(&dev->event_lock); in input_pass_values()
153 handle = rcu_dereference(dev->grab); in input_pass_values()
157 list_for_each_entry_rcu(handle, &dev->h_list, d_node) in input_pass_values()
158 if (handle->open) { in input_pass_values()
168 if (test_bit(EV_REP, dev->evbit) && test_bit(EV_KEY, dev->evbit)) { in input_pass_values()
170 if (v->type == EV_KEY && v->value != 2) { in input_pass_values()
171 if (v->value) in input_pass_values()
172 input_start_autorepeat(dev, v->code); in input_pass_values()
190 struct input_mt *mt = dev->mt; in input_handle_abs_event()
199 if (mt && *pval >= 0 && *pval < mt->num_slots) in input_handle_abs_event()
200 mt->slot = *pval; in input_handle_abs_event()
208 pold = &dev->absinfo[code].value; in input_handle_abs_event()
210 pold = &mt->slots[mt->slot].abs[code - ABS_MT_FIRST]; in input_handle_abs_event()
213 * Bypass filtering for multi-touch events when in input_handle_abs_event()
221 dev->absinfo[code].fuzz); in input_handle_abs_event()
229 if (is_mt_event && mt && mt->slot != input_abs_get_val(dev, ABS_MT_SLOT)) { in input_handle_abs_event()
230 input_abs_set_val(dev, ABS_MT_SLOT, mt->slot); in input_handle_abs_event()
241 int value = *pval; in input_get_disposition() local
243 /* filter-out events from inhibited devices */ in input_get_disposition()
244 if (dev->inhibited) in input_get_disposition()
265 if (is_event_supported(code, dev->keybit, KEY_MAX)) { in input_get_disposition()
267 /* auto-repeat bypasses state updates */ in input_get_disposition()
268 if (value == 2) { in input_get_disposition()
273 if (!!test_bit(code, dev->key) != !!value) { in input_get_disposition()
275 __change_bit(code, dev->key); in input_get_disposition()
282 if (is_event_supported(code, dev->swbit, SW_MAX) && in input_get_disposition()
283 !!test_bit(code, dev->sw) != !!value) { in input_get_disposition()
285 __change_bit(code, dev->sw); in input_get_disposition()
291 if (is_event_supported(code, dev->absbit, ABS_MAX)) in input_get_disposition()
292 disposition = input_handle_abs_event(dev, code, &value); in input_get_disposition()
297 if (is_event_supported(code, dev->relbit, REL_MAX) && value) in input_get_disposition()
303 if (is_event_supported(code, dev->mscbit, MSC_MAX)) in input_get_disposition()
309 if (is_event_supported(code, dev->ledbit, LED_MAX) && in input_get_disposition()
310 !!test_bit(code, dev->led) != !!value) { in input_get_disposition()
312 __change_bit(code, dev->led); in input_get_disposition()
318 if (is_event_supported(code, dev->sndbit, SND_MAX)) { in input_get_disposition()
320 if (!!test_bit(code, dev->snd) != !!value) in input_get_disposition()
321 __change_bit(code, dev->snd); in input_get_disposition()
327 if (code <= REP_MAX && value >= 0 && dev->rep[code] != value) { in input_get_disposition()
328 dev->rep[code] = value; in input_get_disposition()
334 if (value >= 0) in input_get_disposition()
343 *pval = value; in input_get_disposition()
348 unsigned int type, unsigned int code, int value) in input_event_dispose() argument
350 if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event) in input_event_dispose()
351 dev->event(dev, type, code, value); in input_event_dispose()
353 if (!dev->vals) in input_event_dispose()
360 v = &dev->vals[dev->num_vals++]; in input_event_dispose()
361 v->type = EV_ABS; in input_event_dispose()
362 v->code = ABS_MT_SLOT; in input_event_dispose()
363 v->value = dev->mt->slot; in input_event_dispose()
366 v = &dev->vals[dev->num_vals++]; in input_event_dispose()
367 v->type = type; in input_event_dispose()
368 v->code = code; in input_event_dispose()
369 v->value = value; in input_event_dispose()
373 if (dev->num_vals >= 2) in input_event_dispose()
374 input_pass_values(dev, dev->vals, dev->num_vals); in input_event_dispose()
375 dev->num_vals = 0; in input_event_dispose()
382 dev->timestamp[INPUT_CLK_MONO] = ktime_set(0, 0); in input_event_dispose()
383 } else if (dev->num_vals >= dev->max_vals - 2) { in input_event_dispose()
384 dev->vals[dev->num_vals++] = input_value_sync; in input_event_dispose()
385 input_pass_values(dev, dev->vals, dev->num_vals); in input_event_dispose()
386 dev->num_vals = 0; in input_event_dispose()
391 unsigned int type, unsigned int code, int value) in input_handle_event() argument
395 lockdep_assert_held(&dev->event_lock); in input_handle_event()
397 disposition = input_get_disposition(dev, type, code, &value); in input_handle_event()
400 add_input_randomness(type, code, value); in input_handle_event()
402 input_event_dispose(dev, disposition, type, code, value); in input_handle_event()
407 * input_event() - report new input event
411 * @value: value of the event
413 * This function should be used by drivers implementing various input
414 * devices to report input events. See also input_inject_event().
416 * NOTE: input_event() may be safely used right after input device was
419 * input handlers. Such early invocation of input_event() may be used
424 unsigned int type, unsigned int code, int value) in input_event() argument
428 if (is_event_supported(type, dev->evbit, EV_MAX)) { in input_event()
430 spin_lock_irqsave(&dev->event_lock, flags); in input_event()
431 input_handle_event(dev, type, code, value); in input_event()
432 spin_unlock_irqrestore(&dev->event_lock, flags); in input_event()
438 * input_inject_event() - send input event from input handler
439 * @handle: input handle to send event through
442 * @value: value of the event
449 unsigned int type, unsigned int code, int value) in input_inject_event() argument
451 struct input_dev *dev = handle->dev; in input_inject_event()
455 if (is_event_supported(type, dev->evbit, EV_MAX)) { in input_inject_event()
456 spin_lock_irqsave(&dev->event_lock, flags); in input_inject_event()
459 grab = rcu_dereference(dev->grab); in input_inject_event()
461 input_handle_event(dev, type, code, value); in input_inject_event()
464 spin_unlock_irqrestore(&dev->event_lock, flags); in input_inject_event()
470 * input_alloc_absinfo - allocates array of input_absinfo structs
471 * @dev: the input device emitting absolute events
478 if (dev->absinfo) in input_alloc_absinfo()
481 dev->absinfo = kcalloc(ABS_CNT, sizeof(*dev->absinfo), GFP_KERNEL); in input_alloc_absinfo()
482 if (!dev->absinfo) { in input_alloc_absinfo()
483 dev_err(dev->dev.parent ?: &dev->dev, in input_alloc_absinfo()
487 * input_register_device() when we refuse to register input in input_alloc_absinfo()
499 __set_bit(EV_ABS, dev->evbit); in input_set_abs_params()
500 __set_bit(axis, dev->absbit); in input_set_abs_params()
503 if (!dev->absinfo) in input_set_abs_params()
506 absinfo = &dev->absinfo[axis]; in input_set_abs_params()
507 absinfo->minimum = min; in input_set_abs_params()
508 absinfo->maximum = max; in input_set_abs_params()
509 absinfo->fuzz = fuzz; in input_set_abs_params()
510 absinfo->flat = flat; in input_set_abs_params()
515 * input_copy_abs - Copy absinfo from one input_dev to another
516 * @dst: Destination input device to copy the abs settings to
517 * @dst_axis: ABS_* value selecting the destination axis
518 * @src: Source input device to copy the abs settings from
519 * @src_axis: ABS_* value selecting the source axis
522 * the specified source input device's source axis.
523 * This is useful to e.g. setup a pen/stylus input-device for combined
531 if (WARN_ON(!(test_bit(EV_ABS, src->evbit) && in input_copy_abs()
532 test_bit(src_axis, src->absbit)))) in input_copy_abs()
537 * expected to catch this when registering the input devices, which may in input_copy_abs()
540 if (!src->absinfo) in input_copy_abs()
544 if (!dst->absinfo) in input_copy_abs()
547 dst->absinfo[dst_axis] = src->absinfo[src_axis]; in input_copy_abs()
552 * input_grab_device - grabs device for exclusive use
553 * @handle: input handle that wants to own the device
555 * When a device is grabbed by an input handle all events generated by
557 * by other input handles are ignored while device is grabbed.
561 struct input_dev *dev = handle->dev; in input_grab_device()
564 retval = mutex_lock_interruptible(&dev->mutex); in input_grab_device()
568 if (dev->grab) { in input_grab_device()
569 retval = -EBUSY; in input_grab_device()
573 rcu_assign_pointer(dev->grab, handle); in input_grab_device()
576 mutex_unlock(&dev->mutex); in input_grab_device()
583 struct input_dev *dev = handle->dev; in __input_release_device()
586 grabber = rcu_dereference_protected(dev->grab, in __input_release_device()
587 lockdep_is_held(&dev->mutex)); in __input_release_device()
589 rcu_assign_pointer(dev->grab, NULL); in __input_release_device()
593 list_for_each_entry(handle, &dev->h_list, d_node) in __input_release_device()
594 if (handle->open && handle->handler->start) in __input_release_device()
595 handle->handler->start(handle); in __input_release_device()
600 * input_release_device - release previously grabbed device
601 * @handle: input handle that owns the device
603 * Releases previously grabbed device so that other input handles can
604 * start receiving input events. Upon release all handlers attached
610 struct input_dev *dev = handle->dev; in input_release_device()
612 mutex_lock(&dev->mutex); in input_release_device()
614 mutex_unlock(&dev->mutex); in input_release_device()
619 * input_open_device - open input device
622 * This function should be called by input handlers when they
623 * want to start receive events from given input device.
627 struct input_dev *dev = handle->dev; in input_open_device()
630 retval = mutex_lock_interruptible(&dev->mutex); in input_open_device()
634 if (dev->going_away) { in input_open_device()
635 retval = -ENODEV; in input_open_device()
639 handle->open++; in input_open_device()
641 if (dev->users++ || dev->inhibited) { in input_open_device()
649 if (dev->open) { in input_open_device()
650 retval = dev->open(dev); in input_open_device()
652 dev->users--; in input_open_device()
653 handle->open--; in input_open_device()
663 if (dev->poller) in input_open_device()
664 input_dev_poller_start(dev->poller); in input_open_device()
667 mutex_unlock(&dev->mutex); in input_open_device()
674 struct input_dev *dev = handle->dev; in input_flush_device()
677 retval = mutex_lock_interruptible(&dev->mutex); in input_flush_device()
681 if (dev->flush) in input_flush_device()
682 retval = dev->flush(dev, file); in input_flush_device()
684 mutex_unlock(&dev->mutex); in input_flush_device()
690 * input_close_device - close input device
693 * This function should be called by input handlers when they
694 * want to stop receive events from given input device.
698 struct input_dev *dev = handle->dev; in input_close_device()
700 mutex_lock(&dev->mutex); in input_close_device()
704 if (!dev->inhibited && !--dev->users) { in input_close_device()
705 if (dev->poller) in input_close_device()
706 input_dev_poller_stop(dev->poller); in input_close_device()
707 if (dev->close) in input_close_device()
708 dev->close(dev); in input_close_device()
711 if (!--handle->open) { in input_close_device()
714 * completed and that no more input events are delivered in input_close_device()
720 mutex_unlock(&dev->mutex); in input_close_device()
726 * The function must be called with dev->event_lock held.
733 lockdep_assert_held(&dev->event_lock); in input_dev_release_keys()
735 if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) { in input_dev_release_keys()
736 for_each_set_bit(code, dev->key, KEY_CNT) { in input_dev_release_keys()
753 * Mark device as going away. Note that we take dev->mutex here in input_disconnect_device()
754 * not to protect access to dev->going_away but rather to ensure in input_disconnect_device()
757 mutex_lock(&dev->mutex); in input_disconnect_device()
758 dev->going_away = true; in input_disconnect_device()
759 mutex_unlock(&dev->mutex); in input_disconnect_device()
761 spin_lock_irq(&dev->event_lock); in input_disconnect_device()
772 list_for_each_entry(handle, &dev->h_list, d_node) in input_disconnect_device()
773 handle->open = 0; in input_disconnect_device()
775 spin_unlock_irq(&dev->event_lock); in input_disconnect_device()
779 * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry
791 switch (ke->len) { in input_scancode_to_scalar()
793 *scancode = *((u8 *)ke->scancode); in input_scancode_to_scalar()
797 *scancode = *((u16 *)ke->scancode); in input_scancode_to_scalar()
801 *scancode = *((u32 *)ke->scancode); in input_scancode_to_scalar()
805 return -EINVAL; in input_scancode_to_scalar()
820 switch (dev->keycodesize) { in input_fetch_keycode()
822 return ((u8 *)dev->keycode)[index]; in input_fetch_keycode()
825 return ((u16 *)dev->keycode)[index]; in input_fetch_keycode()
828 return ((u32 *)dev->keycode)[index]; in input_fetch_keycode()
838 if (!dev->keycodesize) in input_default_getkeycode()
839 return -EINVAL; in input_default_getkeycode()
841 if (ke->flags & INPUT_KEYMAP_BY_INDEX) in input_default_getkeycode()
842 index = ke->index; in input_default_getkeycode()
849 if (index >= dev->keycodemax) in input_default_getkeycode()
850 return -EINVAL; in input_default_getkeycode()
852 ke->keycode = input_fetch_keycode(dev, index); in input_default_getkeycode()
853 ke->index = index; in input_default_getkeycode()
854 ke->len = sizeof(index); in input_default_getkeycode()
855 memcpy(ke->scancode, &index, sizeof(index)); in input_default_getkeycode()
868 if (!dev->keycodesize) in input_default_setkeycode()
869 return -EINVAL; in input_default_setkeycode()
871 if (ke->flags & INPUT_KEYMAP_BY_INDEX) { in input_default_setkeycode()
872 index = ke->index; in input_default_setkeycode()
879 if (index >= dev->keycodemax) in input_default_setkeycode()
880 return -EINVAL; in input_default_setkeycode()
882 if (dev->keycodesize < sizeof(ke->keycode) && in input_default_setkeycode()
883 (ke->keycode >> (dev->keycodesize * 8))) in input_default_setkeycode()
884 return -EINVAL; in input_default_setkeycode()
886 switch (dev->keycodesize) { in input_default_setkeycode()
888 u8 *k = (u8 *)dev->keycode; in input_default_setkeycode()
890 k[index] = ke->keycode; in input_default_setkeycode()
894 u16 *k = (u16 *)dev->keycode; in input_default_setkeycode()
896 k[index] = ke->keycode; in input_default_setkeycode()
900 u32 *k = (u32 *)dev->keycode; in input_default_setkeycode()
902 k[index] = ke->keycode; in input_default_setkeycode()
908 __clear_bit(*old_keycode, dev->keybit); in input_default_setkeycode()
909 for (i = 0; i < dev->keycodemax; i++) { in input_default_setkeycode()
911 __set_bit(*old_keycode, dev->keybit); in input_default_setkeycode()
918 __set_bit(ke->keycode, dev->keybit); in input_default_setkeycode()
923 * input_get_keycode - retrieve keycode currently mapped to a given scancode
924 * @dev: input device which keymap is being queried
935 spin_lock_irqsave(&dev->event_lock, flags); in input_get_keycode()
936 retval = dev->getkeycode(dev, ke); in input_get_keycode()
937 spin_unlock_irqrestore(&dev->event_lock, flags); in input_get_keycode()
944 * input_set_keycode - attribute a keycode to a given scancode
945 * @dev: input device which keymap is being updated
958 if (ke->keycode > KEY_MAX) in input_set_keycode()
959 return -EINVAL; in input_set_keycode()
961 spin_lock_irqsave(&dev->event_lock, flags); in input_set_keycode()
963 retval = dev->setkeycode(dev, ke, &old_keycode); in input_set_keycode()
968 __clear_bit(KEY_RESERVED, dev->keybit); in input_set_keycode()
975 dev_warn(dev->dev.parent ?: &dev->dev, in input_set_keycode()
978 } else if (test_bit(EV_KEY, dev->evbit) && in input_set_keycode()
979 !is_event_supported(old_keycode, dev->keybit, KEY_MAX) && in input_set_keycode()
980 __test_and_clear_bit(old_keycode, dev->key)) { in input_set_keycode()
994 spin_unlock_irqrestore(&dev->event_lock, flags); in input_set_keycode()
1003 if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) in input_match_device_id()
1004 if (id->bustype != dev->id.bustype) in input_match_device_id()
1007 if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) in input_match_device_id()
1008 if (id->vendor != dev->id.vendor) in input_match_device_id()
1011 if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) in input_match_device_id()
1012 if (id->product != dev->id.product) in input_match_device_id()
1015 if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) in input_match_device_id()
1016 if (id->version != dev->id.version) in input_match_device_id()
1019 if (!bitmap_subset(id->evbit, dev->evbit, EV_MAX) || in input_match_device_id()
1020 !bitmap_subset(id->keybit, dev->keybit, KEY_MAX) || in input_match_device_id()
1021 !bitmap_subset(id->relbit, dev->relbit, REL_MAX) || in input_match_device_id()
1022 !bitmap_subset(id->absbit, dev->absbit, ABS_MAX) || in input_match_device_id()
1023 !bitmap_subset(id->mscbit, dev->mscbit, MSC_MAX) || in input_match_device_id()
1024 !bitmap_subset(id->ledbit, dev->ledbit, LED_MAX) || in input_match_device_id()
1025 !bitmap_subset(id->sndbit, dev->sndbit, SND_MAX) || in input_match_device_id()
1026 !bitmap_subset(id->ffbit, dev->ffbit, FF_MAX) || in input_match_device_id()
1027 !bitmap_subset(id->swbit, dev->swbit, SW_MAX) || in input_match_device_id()
1028 !bitmap_subset(id->propbit, dev->propbit, INPUT_PROP_MAX)) { in input_match_device_id()
1041 for (id = handler->id_table; id->flags || id->driver_info; id++) { in input_match_device()
1043 (!handler->match || handler->match(handler, dev))) { in input_match_device()
1058 return -ENODEV; in input_attach_handler()
1060 error = handler->connect(handler, dev, id); in input_attach_handler()
1061 if (error && error != -ENODEV) in input_attach_handler()
1063 handler->name, kobject_name(&dev->dev.kobj), error); in input_attach_handler()
1082 len += snprintf(buf + len, max(buf_size - len, 0), in input_bits_to_string()
1118 if (file->f_version != input_devices_state) { in input_proc_devices_poll()
1119 file->f_version = input_devices_state; in input_proc_devices_poll()
1136 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_devices_seq_start()
1139 /* We need to fit into seq->private pointer */ in input_devices_seq_start()
1140 BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); in input_devices_seq_start()
1144 state->mutex_acquired = false; in input_devices_seq_start()
1148 state->mutex_acquired = true; in input_devices_seq_start()
1160 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_seq_stop()
1162 if (state->mutex_acquired) in input_seq_stop()
1175 for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { in input_seq_print_bitmap()
1195 const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); in input_devices_seq_show()
1199 dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); in input_devices_seq_show()
1201 seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); in input_devices_seq_show()
1202 seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); in input_devices_seq_show()
1204 seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : ""); in input_devices_seq_show()
1207 list_for_each_entry(handle, &dev->h_list, d_node) in input_devices_seq_show()
1208 seq_printf(seq, "%s ", handle->name); in input_devices_seq_show()
1211 input_seq_print_bitmap(seq, "PROP", dev->propbit, INPUT_PROP_MAX); in input_devices_seq_show()
1213 input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); in input_devices_seq_show()
1214 if (test_bit(EV_KEY, dev->evbit)) in input_devices_seq_show()
1215 input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); in input_devices_seq_show()
1216 if (test_bit(EV_REL, dev->evbit)) in input_devices_seq_show()
1217 input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); in input_devices_seq_show()
1218 if (test_bit(EV_ABS, dev->evbit)) in input_devices_seq_show()
1219 input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); in input_devices_seq_show()
1220 if (test_bit(EV_MSC, dev->evbit)) in input_devices_seq_show()
1221 input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); in input_devices_seq_show()
1222 if (test_bit(EV_LED, dev->evbit)) in input_devices_seq_show()
1223 input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); in input_devices_seq_show()
1224 if (test_bit(EV_SND, dev->evbit)) in input_devices_seq_show()
1225 input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); in input_devices_seq_show()
1226 if (test_bit(EV_FF, dev->evbit)) in input_devices_seq_show()
1227 input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); in input_devices_seq_show()
1228 if (test_bit(EV_SW, dev->evbit)) in input_devices_seq_show()
1229 input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); in input_devices_seq_show()
1259 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_handlers_seq_start()
1262 /* We need to fit into seq->private pointer */ in input_handlers_seq_start()
1263 BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); in input_handlers_seq_start()
1267 state->mutex_acquired = false; in input_handlers_seq_start()
1271 state->mutex_acquired = true; in input_handlers_seq_start()
1272 state->pos = *pos; in input_handlers_seq_start()
1279 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_handlers_seq_next()
1281 state->pos = *pos + 1; in input_handlers_seq_next()
1288 union input_seq_state *state = (union input_seq_state *)&seq->private; in input_handlers_seq_show()
1290 seq_printf(seq, "N: Number=%u Name=%s", state->pos, handler->name); in input_handlers_seq_show()
1291 if (handler->filter) in input_handlers_seq_show()
1293 if (handler->legacy_minors) in input_handlers_seq_show()
1294 seq_printf(seq, " Minor=%d", handler->minor); in input_handlers_seq_show()
1323 proc_bus_input_dir = proc_mkdir("bus/input", NULL); in input_proc_init()
1325 return -ENOMEM; in input_proc_init()
1340 fail1: remove_proc_entry("bus/input", NULL); in input_proc_init()
1341 return -ENOMEM; in input_proc_init()
1348 remove_proc_entry("bus/input", NULL); in input_proc_exit()
1365 input_dev->name ? input_dev->name : ""); \
1382 len += snprintf(buf + len, max(size - len, 0), "%X,", i); in input_print_modalias_bits()
1392 "input:b%04Xv%04Xp%04Xe%04X-", in input_print_modalias()
1393 id->id.bustype, id->id.vendor, in input_print_modalias()
1394 id->id.product, id->id.version); in input_print_modalias()
1396 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1397 'e', id->evbit, 0, EV_MAX); in input_print_modalias()
1398 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1399 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); in input_print_modalias()
1400 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1401 'r', id->relbit, 0, REL_MAX); in input_print_modalias()
1402 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1403 'a', id->absbit, 0, ABS_MAX); in input_print_modalias()
1404 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1405 'm', id->mscbit, 0, MSC_MAX); in input_print_modalias()
1406 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1407 'l', id->ledbit, 0, LED_MAX); in input_print_modalias()
1408 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1409 's', id->sndbit, 0, SND_MAX); in input_print_modalias()
1410 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1411 'f', id->ffbit, 0, FF_MAX); in input_print_modalias()
1412 len += input_print_modalias_bits(buf + len, size - len, in input_print_modalias()
1413 'w', id->swbit, 0, SW_MAX); in input_print_modalias()
1416 len += snprintf(buf + len, max(size - len, 0), "\n"); in input_print_modalias()
1442 int len = input_print_bitmap(buf, PAGE_SIZE, input_dev->propbit, in input_dev_show_properties()
1457 return scnprintf(buf, PAGE_SIZE, "%d\n", input_dev->inhibited); in inhibited_show()
1469 return -EINVAL; in inhibited_store()
1504 return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \
1533 for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { in input_print_bitmap()
1534 len += input_bits_to_string(buf + len, max(buf_size - len, 0), in input_print_bitmap()
1539 len += snprintf(buf + len, max(buf_size - len, 0), " "); in input_print_bitmap()
1550 len += snprintf(buf + len, max(buf_size - len, 0), "\n"); in input_print_bitmap()
1562 input_dev->bm##bit, ev##_MAX, \
1610 kfree(dev->poller); in input_dev_release()
1611 kfree(dev->absinfo); in input_dev_release()
1612 kfree(dev->vals); in input_dev_release()
1619 * Input uevent interface - loading event handlers based on
1628 return -ENOMEM; in input_add_uevent_bm_var()
1630 len = input_print_bitmap(&env->buf[env->buflen - 1], in input_add_uevent_bm_var()
1631 sizeof(env->buf) - env->buflen, in input_add_uevent_bm_var()
1633 if (len >= (sizeof(env->buf) - env->buflen)) in input_add_uevent_bm_var()
1634 return -ENOMEM; in input_add_uevent_bm_var()
1636 env->buflen += len; in input_add_uevent_bm_var()
1646 return -ENOMEM; in input_add_uevent_modalias_var()
1648 len = input_print_modalias(&env->buf[env->buflen - 1], in input_add_uevent_modalias_var()
1649 sizeof(env->buf) - env->buflen, in input_add_uevent_modalias_var()
1651 if (len >= (sizeof(env->buf) - env->buflen)) in input_add_uevent_modalias_var()
1652 return -ENOMEM; in input_add_uevent_modalias_var()
1654 env->buflen += len; in input_add_uevent_modalias_var()
1684 dev->id.bustype, dev->id.vendor, in input_dev_uevent()
1685 dev->id.product, dev->id.version); in input_dev_uevent()
1686 if (dev->name) in input_dev_uevent()
1687 INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); in input_dev_uevent()
1688 if (dev->phys) in input_dev_uevent()
1689 INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); in input_dev_uevent()
1690 if (dev->uniq) in input_dev_uevent()
1691 INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); in input_dev_uevent()
1693 INPUT_ADD_HOTPLUG_BM_VAR("PROP=", dev->propbit, INPUT_PROP_MAX); in input_dev_uevent()
1695 INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); in input_dev_uevent()
1696 if (test_bit(EV_KEY, dev->evbit)) in input_dev_uevent()
1697 INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); in input_dev_uevent()
1698 if (test_bit(EV_REL, dev->evbit)) in input_dev_uevent()
1699 INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); in input_dev_uevent()
1700 if (test_bit(EV_ABS, dev->evbit)) in input_dev_uevent()
1701 INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); in input_dev_uevent()
1702 if (test_bit(EV_MSC, dev->evbit)) in input_dev_uevent()
1703 INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); in input_dev_uevent()
1704 if (test_bit(EV_LED, dev->evbit)) in input_dev_uevent()
1705 INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); in input_dev_uevent()
1706 if (test_bit(EV_SND, dev->evbit)) in input_dev_uevent()
1707 INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); in input_dev_uevent()
1708 if (test_bit(EV_FF, dev->evbit)) in input_dev_uevent()
1709 INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); in input_dev_uevent()
1710 if (test_bit(EV_SW, dev->evbit)) in input_dev_uevent()
1711 INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); in input_dev_uevent()
1723 if (!test_bit(EV_##type, dev->evbit)) \
1726 for_each_set_bit(i, dev->bits##bit, type##_CNT) { \
1727 active = test_bit(i, dev->bits); \
1731 dev->event(dev, EV_##type, i, on ? active : 0); \
1737 if (!dev->event) in input_dev_toggle()
1743 if (activate && test_bit(EV_REP, dev->evbit)) { in input_dev_toggle()
1744 dev->event(dev, EV_REP, REP_PERIOD, dev->rep[REP_PERIOD]); in input_dev_toggle()
1745 dev->event(dev, EV_REP, REP_DELAY, dev->rep[REP_DELAY]); in input_dev_toggle()
1750 * input_reset_device() - reset/restore the state of input device
1751 * @dev: input device whose state needs to be reset
1753 * This function tries to reset the state of an opened input device and
1761 mutex_lock(&dev->mutex); in input_reset_device()
1762 spin_lock_irqsave(&dev->event_lock, flags); in input_reset_device()
1768 spin_unlock_irqrestore(&dev->event_lock, flags); in input_reset_device()
1769 mutex_unlock(&dev->mutex); in input_reset_device()
1775 mutex_lock(&dev->mutex); in input_inhibit_device()
1777 if (dev->inhibited) in input_inhibit_device()
1780 if (dev->users) { in input_inhibit_device()
1781 if (dev->close) in input_inhibit_device()
1782 dev->close(dev); in input_inhibit_device()
1783 if (dev->poller) in input_inhibit_device()
1784 input_dev_poller_stop(dev->poller); in input_inhibit_device()
1787 spin_lock_irq(&dev->event_lock); in input_inhibit_device()
1792 spin_unlock_irq(&dev->event_lock); in input_inhibit_device()
1794 dev->inhibited = true; in input_inhibit_device()
1797 mutex_unlock(&dev->mutex); in input_inhibit_device()
1805 mutex_lock(&dev->mutex); in input_uninhibit_device()
1807 if (!dev->inhibited) in input_uninhibit_device()
1810 if (dev->users) { in input_uninhibit_device()
1811 if (dev->open) { in input_uninhibit_device()
1812 ret = dev->open(dev); in input_uninhibit_device()
1816 if (dev->poller) in input_uninhibit_device()
1817 input_dev_poller_start(dev->poller); in input_uninhibit_device()
1820 dev->inhibited = false; in input_uninhibit_device()
1821 spin_lock_irq(&dev->event_lock); in input_uninhibit_device()
1823 spin_unlock_irq(&dev->event_lock); in input_uninhibit_device()
1826 mutex_unlock(&dev->mutex); in input_uninhibit_device()
1835 spin_lock_irq(&input_dev->event_lock); in input_dev_suspend()
1847 spin_unlock_irq(&input_dev->event_lock); in input_dev_suspend()
1856 spin_lock_irq(&input_dev->event_lock); in input_dev_resume()
1861 spin_unlock_irq(&input_dev->event_lock); in input_dev_resume()
1870 spin_lock_irq(&input_dev->event_lock); in input_dev_freeze()
1879 spin_unlock_irq(&input_dev->event_lock); in input_dev_freeze()
1888 spin_lock_irq(&input_dev->event_lock); in input_dev_poweroff()
1893 spin_unlock_irq(&input_dev->event_lock); in input_dev_poweroff()
1918 return kasprintf(GFP_KERNEL, "input/%s", dev_name(dev)); in input_devnode()
1922 .name = "input",
1928 * input_allocate_device - allocate memory for new input device
1938 static atomic_t input_no = ATOMIC_INIT(-1); in input_allocate_device()
1943 dev->dev.type = &input_dev_type; in input_allocate_device()
1944 dev->dev.class = &input_class; in input_allocate_device()
1945 device_initialize(&dev->dev); in input_allocate_device()
1946 mutex_init(&dev->mutex); in input_allocate_device()
1947 spin_lock_init(&dev->event_lock); in input_allocate_device()
1948 timer_setup(&dev->timer, NULL, 0); in input_allocate_device()
1949 INIT_LIST_HEAD(&dev->h_list); in input_allocate_device()
1950 INIT_LIST_HEAD(&dev->node); in input_allocate_device()
1952 dev_set_name(&dev->dev, "input%lu", in input_allocate_device()
1963 struct input_dev *input; member
1970 return devres->input == data; in devm_input_device_match()
1976 struct input_dev *input = devres->input; in devm_input_device_release() local
1979 __func__, dev_name(&input->dev)); in devm_input_device_release()
1980 input_put_device(input); in devm_input_device_release()
1984 * devm_input_allocate_device - allocate managed input device
1985 * @dev: device owning the input device being created
1989 * Managed input devices do not need to be explicitly unregistered or
1991 * its driver (or binding fails). Once managed input device is allocated,
1993 * input device. There are no special devm_input_device_[un]register()
1995 * should you need them. In most cases however, managed input device need
1998 * NOTE: the owner device is set up as parent of input device and users
2003 struct input_dev *input; in devm_input_allocate_device() local
2011 input = input_allocate_device(); in devm_input_allocate_device()
2012 if (!input) { in devm_input_allocate_device()
2017 input->dev.parent = dev; in devm_input_allocate_device()
2018 input->devres_managed = true; in devm_input_allocate_device()
2020 devres->input = input; in devm_input_allocate_device()
2023 return input; in devm_input_allocate_device()
2028 * input_free_device - free memory occupied by input_dev structure
2029 * @dev: input device to free
2038 * NOTE: If there are references to the input device then memory
2044 if (dev->devres_managed) in input_free_device()
2045 WARN_ON(devres_destroy(dev->dev.parent, in input_free_device()
2055 * input_set_timestamp - set timestamp for input events
2056 * @dev: input device to set timestamp for
2060 * This function is intended to provide to the input system a more
2070 dev->timestamp[INPUT_CLK_MONO] = timestamp; in input_set_timestamp()
2071 dev->timestamp[INPUT_CLK_REAL] = ktime_mono_to_real(timestamp); in input_set_timestamp()
2072 dev->timestamp[INPUT_CLK_BOOT] = ktime_mono_to_any(timestamp, in input_set_timestamp()
2078 * input_get_timestamp - get timestamp for input events
2079 * @dev: input device to get timestamp from
2081 * A valid timestamp is a timestamp of non-zero value.
2087 if (!ktime_compare(dev->timestamp[INPUT_CLK_MONO], invalid_timestamp)) in input_get_timestamp()
2090 return dev->timestamp; in input_get_timestamp()
2095 * input_set_capability - mark device as capable of a certain event
2101 * bitmap the function also adjusts dev->evbit.
2115 __set_bit(code, dev->keybit); in input_set_capability()
2119 __set_bit(code, dev->relbit); in input_set_capability()
2124 __set_bit(code, dev->absbit); in input_set_capability()
2128 __set_bit(code, dev->mscbit); in input_set_capability()
2132 __set_bit(code, dev->swbit); in input_set_capability()
2136 __set_bit(code, dev->ledbit); in input_set_capability()
2140 __set_bit(code, dev->sndbit); in input_set_capability()
2144 __set_bit(code, dev->ffbit); in input_set_capability()
2157 __set_bit(type, dev->evbit); in input_set_capability()
2167 if (dev->mt) { in input_estimate_events_per_packet()
2168 mt_slots = dev->mt->num_slots; in input_estimate_events_per_packet()
2169 } else if (test_bit(ABS_MT_TRACKING_ID, dev->absbit)) { in input_estimate_events_per_packet()
2170 mt_slots = dev->absinfo[ABS_MT_TRACKING_ID].maximum - in input_estimate_events_per_packet()
2171 dev->absinfo[ABS_MT_TRACKING_ID].minimum + 1, in input_estimate_events_per_packet()
2173 } else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) { in input_estimate_events_per_packet()
2181 if (test_bit(EV_ABS, dev->evbit)) in input_estimate_events_per_packet()
2182 for_each_set_bit(i, dev->absbit, ABS_CNT) in input_estimate_events_per_packet()
2185 if (test_bit(EV_REL, dev->evbit)) in input_estimate_events_per_packet()
2186 events += bitmap_weight(dev->relbit, REL_CNT); in input_estimate_events_per_packet()
2196 if (!test_bit(EV_##type, dev->evbit)) \
2197 memset(dev->bits##bit, 0, \
2198 sizeof(dev->bits##bit)); \
2221 list_for_each_entry_safe(handle, next, &dev->h_list, d_node) in __input_unregister_device()
2222 handle->handler->disconnect(handle); in __input_unregister_device()
2223 WARN_ON(!list_empty(&dev->h_list)); in __input_unregister_device()
2225 del_timer_sync(&dev->timer); in __input_unregister_device()
2226 list_del_init(&dev->node); in __input_unregister_device()
2232 device_del(&dev->dev); in __input_unregister_device()
2238 struct input_dev *input = devres->input; in devm_input_device_unregister() local
2241 __func__, dev_name(&input->dev)); in devm_input_device_unregister()
2242 __input_unregister_device(input); in devm_input_device_unregister()
2247 * dev->event_lock here to avoid racing with input_event
2255 spin_lock_irqsave(&dev->event_lock, flags); in input_repeat_key()
2257 if (!dev->inhibited && in input_repeat_key()
2258 test_bit(dev->repeat_key, dev->key) && in input_repeat_key()
2259 is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) { in input_repeat_key()
2262 input_handle_event(dev, EV_KEY, dev->repeat_key, 2); in input_repeat_key()
2265 if (dev->rep[REP_PERIOD]) in input_repeat_key()
2266 mod_timer(&dev->timer, jiffies + in input_repeat_key()
2267 msecs_to_jiffies(dev->rep[REP_PERIOD])); in input_repeat_key()
2270 spin_unlock_irqrestore(&dev->event_lock, flags); in input_repeat_key()
2274 * input_enable_softrepeat - enable software autorepeat
2275 * @dev: input device
2279 * Enable software autorepeat on the input device.
2283 dev->timer.function = input_repeat_key; in input_enable_softrepeat()
2284 dev->rep[REP_DELAY] = delay; in input_enable_softrepeat()
2285 dev->rep[REP_PERIOD] = period; in input_enable_softrepeat()
2291 lockdep_assert_held(&dev->mutex); in input_device_enabled()
2293 return !dev->inhibited && dev->users > 0; in input_device_enabled()
2298 * input_register_device - register device with input core
2301 * This function registers device with input core. The device must be
2309 * Note that this function is also used to register managed input devices
2310 * (ones allocated with devm_input_allocate_device()). Such managed input
2313 * that tear down of managed input devices is internally a 2-step process:
2314 * registered managed input device is first unregistered, but stays in
2316 * not be delivered anywhere). The freeing of managed input device will
2328 if (test_bit(EV_ABS, dev->evbit) && !dev->absinfo) { in input_register_device()
2329 dev_err(&dev->dev, in input_register_device()
2330 "Absolute device without dev->absinfo, refusing to register\n"); in input_register_device()
2331 return -EINVAL; in input_register_device()
2334 if (dev->devres_managed) { in input_register_device()
2338 return -ENOMEM; in input_register_device()
2340 devres->input = dev; in input_register_device()
2343 /* Every input device generates EV_SYN/SYN_REPORT events. */ in input_register_device()
2344 __set_bit(EV_SYN, dev->evbit); in input_register_device()
2347 __clear_bit(KEY_RESERVED, dev->keybit); in input_register_device()
2349 /* Make sure that bitmasks not mentioned in dev->evbit are clean. */ in input_register_device()
2353 if (dev->hint_events_per_packet < packet_size) in input_register_device()
2354 dev->hint_events_per_packet = packet_size; in input_register_device()
2356 dev->max_vals = dev->hint_events_per_packet + 2; in input_register_device()
2357 dev->vals = kcalloc(dev->max_vals, sizeof(*dev->vals), GFP_KERNEL); in input_register_device()
2358 if (!dev->vals) { in input_register_device()
2359 error = -ENOMEM; in input_register_device()
2364 * If delay and period are pre-set by the driver, then autorepeating in input_register_device()
2365 * is handled by the driver itself and we don't do it in input.c. in input_register_device()
2367 if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) in input_register_device()
2370 if (!dev->getkeycode) in input_register_device()
2371 dev->getkeycode = input_default_getkeycode; in input_register_device()
2373 if (!dev->setkeycode) in input_register_device()
2374 dev->setkeycode = input_default_setkeycode; in input_register_device()
2376 if (dev->poller) in input_register_device()
2377 input_dev_poller_finalize(dev->poller); in input_register_device()
2379 error = device_add(&dev->dev); in input_register_device()
2383 path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); in input_register_device()
2385 dev->name ? dev->name : "Unspecified device", in input_register_device()
2393 list_add_tail(&dev->node, &input_dev_list); in input_register_device()
2402 if (dev->devres_managed) { in input_register_device()
2403 dev_dbg(dev->dev.parent, "%s: registering %s with devres.\n", in input_register_device()
2404 __func__, dev_name(&dev->dev)); in input_register_device()
2405 devres_add(dev->dev.parent, devres); in input_register_device()
2410 device_del(&dev->dev); in input_register_device()
2412 kfree(dev->vals); in input_register_device()
2413 dev->vals = NULL; in input_register_device()
2421 * input_unregister_device - unregister previously registered device
2424 * This function unregisters an input device. Once device is unregistered
2429 if (dev->devres_managed) { in input_unregister_device()
2430 WARN_ON(devres_destroy(dev->dev.parent, in input_unregister_device()
2447 * input_register_handler - register a new input handler
2450 * This function registers a new input handler (interface) for input
2451 * devices in the system and attaches it to all input devices that
2463 INIT_LIST_HEAD(&handler->h_list); in input_register_handler()
2465 list_add_tail(&handler->node, &input_handler_list); in input_register_handler()
2478 * input_unregister_handler - unregisters an input handler
2481 * This function disconnects a handler from its input devices and
2490 list_for_each_entry_safe(handle, next, &handler->h_list, h_node) in input_unregister_handler()
2491 handler->disconnect(handle); in input_unregister_handler()
2492 WARN_ON(!list_empty(&handler->h_list)); in input_unregister_handler()
2494 list_del_init(&handler->node); in input_unregister_handler()
2503 * input_handler_for_each_handle - handle iterator
2504 * @handler: input handler to iterate
2509 * it @data and stop when @fn returns a non-zero value. The function is
2522 list_for_each_entry_rcu(handle, &handler->h_list, h_node) { in input_handler_for_each_handle()
2535 * input_register_handle - register a new input handle
2538 * This function puts a new input handle onto device's
2547 struct input_handler *handler = handle->handler; in input_register_handle()
2548 struct input_dev *dev = handle->dev; in input_register_handle()
2552 * We take dev->mutex here to prevent race with in input_register_handle()
2555 error = mutex_lock_interruptible(&dev->mutex); in input_register_handle()
2563 if (handler->filter) in input_register_handle()
2564 list_add_rcu(&handle->d_node, &dev->h_list); in input_register_handle()
2566 list_add_tail_rcu(&handle->d_node, &dev->h_list); in input_register_handle()
2568 mutex_unlock(&dev->mutex); in input_register_handle()
2571 * Since we are supposed to be called from ->connect() in input_register_handle()
2572 * which is mutually exclusive with ->disconnect() in input_register_handle()
2576 list_add_tail_rcu(&handle->h_node, &handler->h_list); in input_register_handle()
2578 if (handler->start) in input_register_handle()
2579 handler->start(handle); in input_register_handle()
2586 * input_unregister_handle - unregister an input handle
2589 * This function removes input handle from device's
2597 struct input_dev *dev = handle->dev; in input_unregister_handle()
2599 list_del_rcu(&handle->h_node); in input_unregister_handle()
2602 * Take dev->mutex to prevent race with input_release_device(). in input_unregister_handle()
2604 mutex_lock(&dev->mutex); in input_unregister_handle()
2605 list_del_rcu(&handle->d_node); in input_unregister_handle()
2606 mutex_unlock(&dev->mutex); in input_unregister_handle()
2613 * input_get_new_minor - allocates a new input minor number
2618 * This function allocates a new device minor for from input major namespace.
2627 * This function should be called from input handler's ->connect() in input_get_new_minor()
2647 * input_free_minor - release previously allocated minor
2650 * This function releases previously allocated input minor so that it can be
2674 INPUT_MAX_CHAR_DEVICES, "input"); in input_init()