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1 : : /* SPDX-License-Identifier: GPL-2.0-only */
2 : : /*
3 : : * Copyright (c) 1999-2002 Vojtech Pavlik
4 : : */
5 : : #ifndef _INPUT_H
6 : : #define _INPUT_H
7 : :
8 : : #include <linux/time.h>
9 : : #include <linux/list.h>
10 : : #include <uapi/linux/input.h>
11 : : /* Implementation details, userspace should not care about these */
12 : : #define ABS_MT_FIRST ABS_MT_TOUCH_MAJOR
13 : : #define ABS_MT_LAST ABS_MT_TOOL_Y
14 : :
15 : : /*
16 : : * In-kernel definitions.
17 : : */
18 : :
19 : : #include <linux/device.h>
20 : : #include <linux/fs.h>
21 : : #include <linux/timer.h>
22 : : #include <linux/mod_devicetable.h>
23 : :
24 : : struct input_dev_poller;
25 : :
26 : : /**
27 : : * struct input_value - input value representation
28 : : * @type: type of value (EV_KEY, EV_ABS, etc)
29 : : * @code: the value code
30 : : * @value: the value
31 : : */
32 : : struct input_value {
33 : : __u16 type;
34 : : __u16 code;
35 : : __s32 value;
36 : : };
37 : :
38 : : enum input_clock_type {
39 : : INPUT_CLK_REAL = 0,
40 : : INPUT_CLK_MONO,
41 : : INPUT_CLK_BOOT,
42 : : INPUT_CLK_MAX
43 : : };
44 : :
45 : : /**
46 : : * struct input_dev - represents an input device
47 : : * @name: name of the device
48 : : * @phys: physical path to the device in the system hierarchy
49 : : * @uniq: unique identification code for the device (if device has it)
50 : : * @id: id of the device (struct input_id)
51 : : * @propbit: bitmap of device properties and quirks
52 : : * @evbit: bitmap of types of events supported by the device (EV_KEY,
53 : : * EV_REL, etc.)
54 : : * @keybit: bitmap of keys/buttons this device has
55 : : * @relbit: bitmap of relative axes for the device
56 : : * @absbit: bitmap of absolute axes for the device
57 : : * @mscbit: bitmap of miscellaneous events supported by the device
58 : : * @ledbit: bitmap of leds present on the device
59 : : * @sndbit: bitmap of sound effects supported by the device
60 : : * @ffbit: bitmap of force feedback effects supported by the device
61 : : * @swbit: bitmap of switches present on the device
62 : : * @hint_events_per_packet: average number of events generated by the
63 : : * device in a packet (between EV_SYN/SYN_REPORT events). Used by
64 : : * event handlers to estimate size of the buffer needed to hold
65 : : * events.
66 : : * @keycodemax: size of keycode table
67 : : * @keycodesize: size of elements in keycode table
68 : : * @keycode: map of scancodes to keycodes for this device
69 : : * @getkeycode: optional legacy method to retrieve current keymap.
70 : : * @setkeycode: optional method to alter current keymap, used to implement
71 : : * sparse keymaps. If not supplied default mechanism will be used.
72 : : * The method is being called while holding event_lock and thus must
73 : : * not sleep
74 : : * @ff: force feedback structure associated with the device if device
75 : : * supports force feedback effects
76 : : * @poller: poller structure associated with the device if device is
77 : : * set up to use polling mode
78 : : * @repeat_key: stores key code of the last key pressed; used to implement
79 : : * software autorepeat
80 : : * @timer: timer for software autorepeat
81 : : * @rep: current values for autorepeat parameters (delay, rate)
82 : : * @mt: pointer to multitouch state
83 : : * @absinfo: array of &struct input_absinfo elements holding information
84 : : * about absolute axes (current value, min, max, flat, fuzz,
85 : : * resolution)
86 : : * @key: reflects current state of device's keys/buttons
87 : : * @led: reflects current state of device's LEDs
88 : : * @snd: reflects current state of sound effects
89 : : * @sw: reflects current state of device's switches
90 : : * @open: this method is called when the very first user calls
91 : : * input_open_device(). The driver must prepare the device
92 : : * to start generating events (start polling thread,
93 : : * request an IRQ, submit URB, etc.)
94 : : * @close: this method is called when the very last user calls
95 : : * input_close_device().
96 : : * @flush: purges the device. Most commonly used to get rid of force
97 : : * feedback effects loaded into the device when disconnecting
98 : : * from it
99 : : * @event: event handler for events sent _to_ the device, like EV_LED
100 : : * or EV_SND. The device is expected to carry out the requested
101 : : * action (turn on a LED, play sound, etc.) The call is protected
102 : : * by @event_lock and must not sleep
103 : : * @grab: input handle that currently has the device grabbed (via
104 : : * EVIOCGRAB ioctl). When a handle grabs a device it becomes sole
105 : : * recipient for all input events coming from the device
106 : : * @event_lock: this spinlock is taken when input core receives
107 : : * and processes a new event for the device (in input_event()).
108 : : * Code that accesses and/or modifies parameters of a device
109 : : * (such as keymap or absmin, absmax, absfuzz, etc.) after device
110 : : * has been registered with input core must take this lock.
111 : : * @mutex: serializes calls to open(), close() and flush() methods
112 : : * @users: stores number of users (input handlers) that opened this
113 : : * device. It is used by input_open_device() and input_close_device()
114 : : * to make sure that dev->open() is only called when the first
115 : : * user opens device and dev->close() is called when the very
116 : : * last user closes the device
117 : : * @going_away: marks devices that are in a middle of unregistering and
118 : : * causes input_open_device*() fail with -ENODEV.
119 : : * @dev: driver model's view of this device
120 : : * @h_list: list of input handles associated with the device. When
121 : : * accessing the list dev->mutex must be held
122 : : * @node: used to place the device onto input_dev_list
123 : : * @num_vals: number of values queued in the current frame
124 : : * @max_vals: maximum number of values queued in a frame
125 : : * @vals: array of values queued in the current frame
126 : : * @devres_managed: indicates that devices is managed with devres framework
127 : : * and needs not be explicitly unregistered or freed.
128 : : * @timestamp: storage for a timestamp set by input_set_timestamp called
129 : : * by a driver
130 : : */
131 : : struct input_dev {
132 : : const char *name;
133 : : const char *phys;
134 : : const char *uniq;
135 : : struct input_id id;
136 : :
137 : : unsigned long propbit[BITS_TO_LONGS(INPUT_PROP_CNT)];
138 : :
139 : : unsigned long evbit[BITS_TO_LONGS(EV_CNT)];
140 : : unsigned long keybit[BITS_TO_LONGS(KEY_CNT)];
141 : : unsigned long relbit[BITS_TO_LONGS(REL_CNT)];
142 : : unsigned long absbit[BITS_TO_LONGS(ABS_CNT)];
143 : : unsigned long mscbit[BITS_TO_LONGS(MSC_CNT)];
144 : : unsigned long ledbit[BITS_TO_LONGS(LED_CNT)];
145 : : unsigned long sndbit[BITS_TO_LONGS(SND_CNT)];
146 : : unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
147 : : unsigned long swbit[BITS_TO_LONGS(SW_CNT)];
148 : :
149 : : unsigned int hint_events_per_packet;
150 : :
151 : : unsigned int keycodemax;
152 : : unsigned int keycodesize;
153 : : void *keycode;
154 : :
155 : : int (*setkeycode)(struct input_dev *dev,
156 : : const struct input_keymap_entry *ke,
157 : : unsigned int *old_keycode);
158 : : int (*getkeycode)(struct input_dev *dev,
159 : : struct input_keymap_entry *ke);
160 : :
161 : : struct ff_device *ff;
162 : :
163 : : struct input_dev_poller *poller;
164 : :
165 : : unsigned int repeat_key;
166 : : struct timer_list timer;
167 : :
168 : : int rep[REP_CNT];
169 : :
170 : : struct input_mt *mt;
171 : :
172 : : struct input_absinfo *absinfo;
173 : :
174 : : unsigned long key[BITS_TO_LONGS(KEY_CNT)];
175 : : unsigned long led[BITS_TO_LONGS(LED_CNT)];
176 : : unsigned long snd[BITS_TO_LONGS(SND_CNT)];
177 : : unsigned long sw[BITS_TO_LONGS(SW_CNT)];
178 : :
179 : : int (*open)(struct input_dev *dev);
180 : : void (*close)(struct input_dev *dev);
181 : : int (*flush)(struct input_dev *dev, struct file *file);
182 : : int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
183 : :
184 : : struct input_handle __rcu *grab;
185 : :
186 : : spinlock_t event_lock;
187 : : struct mutex mutex;
188 : :
189 : : unsigned int users;
190 : : bool going_away;
191 : :
192 : : struct device dev;
193 : :
194 : : struct list_head h_list;
195 : : struct list_head node;
196 : :
197 : : unsigned int num_vals;
198 : : unsigned int max_vals;
199 : : struct input_value *vals;
200 : :
201 : : bool devres_managed;
202 : :
203 : : ktime_t timestamp[INPUT_CLK_MAX];
204 : : };
205 : : #define to_input_dev(d) container_of(d, struct input_dev, dev)
206 : :
207 : : /*
208 : : * Verify that we are in sync with input_device_id mod_devicetable.h #defines
209 : : */
210 : :
211 : : #if EV_MAX != INPUT_DEVICE_ID_EV_MAX
212 : : #error "EV_MAX and INPUT_DEVICE_ID_EV_MAX do not match"
213 : : #endif
214 : :
215 : : #if KEY_MIN_INTERESTING != INPUT_DEVICE_ID_KEY_MIN_INTERESTING
216 : : #error "KEY_MIN_INTERESTING and INPUT_DEVICE_ID_KEY_MIN_INTERESTING do not match"
217 : : #endif
218 : :
219 : : #if KEY_MAX != INPUT_DEVICE_ID_KEY_MAX
220 : : #error "KEY_MAX and INPUT_DEVICE_ID_KEY_MAX do not match"
221 : : #endif
222 : :
223 : : #if REL_MAX != INPUT_DEVICE_ID_REL_MAX
224 : : #error "REL_MAX and INPUT_DEVICE_ID_REL_MAX do not match"
225 : : #endif
226 : :
227 : : #if ABS_MAX != INPUT_DEVICE_ID_ABS_MAX
228 : : #error "ABS_MAX and INPUT_DEVICE_ID_ABS_MAX do not match"
229 : : #endif
230 : :
231 : : #if MSC_MAX != INPUT_DEVICE_ID_MSC_MAX
232 : : #error "MSC_MAX and INPUT_DEVICE_ID_MSC_MAX do not match"
233 : : #endif
234 : :
235 : : #if LED_MAX != INPUT_DEVICE_ID_LED_MAX
236 : : #error "LED_MAX and INPUT_DEVICE_ID_LED_MAX do not match"
237 : : #endif
238 : :
239 : : #if SND_MAX != INPUT_DEVICE_ID_SND_MAX
240 : : #error "SND_MAX and INPUT_DEVICE_ID_SND_MAX do not match"
241 : : #endif
242 : :
243 : : #if FF_MAX != INPUT_DEVICE_ID_FF_MAX
244 : : #error "FF_MAX and INPUT_DEVICE_ID_FF_MAX do not match"
245 : : #endif
246 : :
247 : : #if SW_MAX != INPUT_DEVICE_ID_SW_MAX
248 : : #error "SW_MAX and INPUT_DEVICE_ID_SW_MAX do not match"
249 : : #endif
250 : :
251 : : #if INPUT_PROP_MAX != INPUT_DEVICE_ID_PROP_MAX
252 : : #error "INPUT_PROP_MAX and INPUT_DEVICE_ID_PROP_MAX do not match"
253 : : #endif
254 : :
255 : : #define INPUT_DEVICE_ID_MATCH_DEVICE \
256 : : (INPUT_DEVICE_ID_MATCH_BUS | INPUT_DEVICE_ID_MATCH_VENDOR | INPUT_DEVICE_ID_MATCH_PRODUCT)
257 : : #define INPUT_DEVICE_ID_MATCH_DEVICE_AND_VERSION \
258 : : (INPUT_DEVICE_ID_MATCH_DEVICE | INPUT_DEVICE_ID_MATCH_VERSION)
259 : :
260 : : struct input_handle;
261 : :
262 : : /**
263 : : * struct input_handler - implements one of interfaces for input devices
264 : : * @private: driver-specific data
265 : : * @event: event handler. This method is being called by input core with
266 : : * interrupts disabled and dev->event_lock spinlock held and so
267 : : * it may not sleep
268 : : * @events: event sequence handler. This method is being called by
269 : : * input core with interrupts disabled and dev->event_lock
270 : : * spinlock held and so it may not sleep
271 : : * @filter: similar to @event; separates normal event handlers from
272 : : * "filters".
273 : : * @match: called after comparing device's id with handler's id_table
274 : : * to perform fine-grained matching between device and handler
275 : : * @connect: called when attaching a handler to an input device
276 : : * @disconnect: disconnects a handler from input device
277 : : * @start: starts handler for given handle. This function is called by
278 : : * input core right after connect() method and also when a process
279 : : * that "grabbed" a device releases it
280 : : * @legacy_minors: set to %true by drivers using legacy minor ranges
281 : : * @minor: beginning of range of 32 legacy minors for devices this driver
282 : : * can provide
283 : : * @name: name of the handler, to be shown in /proc/bus/input/handlers
284 : : * @id_table: pointer to a table of input_device_ids this driver can
285 : : * handle
286 : : * @h_list: list of input handles associated with the handler
287 : : * @node: for placing the driver onto input_handler_list
288 : : *
289 : : * Input handlers attach to input devices and create input handles. There
290 : : * are likely several handlers attached to any given input device at the
291 : : * same time. All of them will get their copy of input event generated by
292 : : * the device.
293 : : *
294 : : * The very same structure is used to implement input filters. Input core
295 : : * allows filters to run first and will not pass event to regular handlers
296 : : * if any of the filters indicate that the event should be filtered (by
297 : : * returning %true from their filter() method).
298 : : *
299 : : * Note that input core serializes calls to connect() and disconnect()
300 : : * methods.
301 : : */
302 : : struct input_handler {
303 : :
304 : : void *private;
305 : :
306 : : void (*event)(struct input_handle *handle, unsigned int type, unsigned int code, int value);
307 : : void (*events)(struct input_handle *handle,
308 : : const struct input_value *vals, unsigned int count);
309 : : bool (*filter)(struct input_handle *handle, unsigned int type, unsigned int code, int value);
310 : : bool (*match)(struct input_handler *handler, struct input_dev *dev);
311 : : int (*connect)(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id);
312 : : void (*disconnect)(struct input_handle *handle);
313 : : void (*start)(struct input_handle *handle);
314 : :
315 : : bool legacy_minors;
316 : : int minor;
317 : : const char *name;
318 : :
319 : : const struct input_device_id *id_table;
320 : :
321 : : struct list_head h_list;
322 : : struct list_head node;
323 : : };
324 : :
325 : : /**
326 : : * struct input_handle - links input device with an input handler
327 : : * @private: handler-specific data
328 : : * @open: counter showing whether the handle is 'open', i.e. should deliver
329 : : * events from its device
330 : : * @name: name given to the handle by handler that created it
331 : : * @dev: input device the handle is attached to
332 : : * @handler: handler that works with the device through this handle
333 : : * @d_node: used to put the handle on device's list of attached handles
334 : : * @h_node: used to put the handle on handler's list of handles from which
335 : : * it gets events
336 : : */
337 : : struct input_handle {
338 : :
339 : : void *private;
340 : :
341 : : int open;
342 : : const char *name;
343 : :
344 : : struct input_dev *dev;
345 : : struct input_handler *handler;
346 : :
347 : : struct list_head d_node;
348 : : struct list_head h_node;
349 : : };
350 : :
351 : : struct input_dev __must_check *input_allocate_device(void);
352 : : struct input_dev __must_check *devm_input_allocate_device(struct device *);
353 : : void input_free_device(struct input_dev *dev);
354 : :
355 : 90 : static inline struct input_dev *input_get_device(struct input_dev *dev)
356 : : {
357 [ + - ]: 90 : return dev ? to_input_dev(get_device(&dev->dev)) : NULL;
358 : : }
359 : :
360 : 30 : static inline void input_put_device(struct input_dev *dev)
361 : : {
362 [ # # # # ]: 0 : if (dev)
363 : 30 : put_device(&dev->dev);
364 : 30 : }
365 : :
366 : 0 : static inline void *input_get_drvdata(struct input_dev *dev)
367 : : {
368 [ # # # # : 0 : return dev_get_drvdata(&dev->dev);
# # ]
369 : : }
370 : :
371 : 60 : static inline void input_set_drvdata(struct input_dev *dev, void *data)
372 : : {
373 [ + - ]: 60 : dev_set_drvdata(&dev->dev, data);
374 : : }
375 : :
376 : : int __must_check input_register_device(struct input_dev *);
377 : : void input_unregister_device(struct input_dev *);
378 : :
379 : : void input_reset_device(struct input_dev *);
380 : :
381 : : int input_setup_polling(struct input_dev *dev,
382 : : void (*poll_fn)(struct input_dev *dev));
383 : : void input_set_poll_interval(struct input_dev *dev, unsigned int interval);
384 : : void input_set_min_poll_interval(struct input_dev *dev, unsigned int interval);
385 : : void input_set_max_poll_interval(struct input_dev *dev, unsigned int interval);
386 : : int input_get_poll_interval(struct input_dev *dev);
387 : :
388 : : int __must_check input_register_handler(struct input_handler *);
389 : : void input_unregister_handler(struct input_handler *);
390 : :
391 : : int __must_check input_get_new_minor(int legacy_base, unsigned int legacy_num,
392 : : bool allow_dynamic);
393 : : void input_free_minor(unsigned int minor);
394 : :
395 : : int input_handler_for_each_handle(struct input_handler *, void *data,
396 : : int (*fn)(struct input_handle *, void *));
397 : :
398 : : int input_register_handle(struct input_handle *);
399 : : void input_unregister_handle(struct input_handle *);
400 : :
401 : : int input_grab_device(struct input_handle *);
402 : : void input_release_device(struct input_handle *);
403 : :
404 : : int input_open_device(struct input_handle *);
405 : : void input_close_device(struct input_handle *);
406 : :
407 : : int input_flush_device(struct input_handle *handle, struct file *file);
408 : :
409 : : void input_set_timestamp(struct input_dev *dev, ktime_t timestamp);
410 : : ktime_t *input_get_timestamp(struct input_dev *dev);
411 : :
412 : : void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);
413 : : void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value);
414 : :
415 : 90 : static inline void input_report_key(struct input_dev *dev, unsigned int code, int value)
416 : : {
417 : 30 : input_event(dev, EV_KEY, code, !!value);
418 : 0 : }
419 : :
420 : 60 : static inline void input_report_rel(struct input_dev *dev, unsigned int code, int value)
421 : : {
422 : 30 : input_event(dev, EV_REL, code, value);
423 : 0 : }
424 : :
425 : 0 : static inline void input_report_abs(struct input_dev *dev, unsigned int code, int value)
426 : : {
427 : 0 : input_event(dev, EV_ABS, code, value);
428 : 0 : }
429 : :
430 : : static inline void input_report_ff_status(struct input_dev *dev, unsigned int code, int value)
431 : : {
432 : : input_event(dev, EV_FF_STATUS, code, value);
433 : : }
434 : :
435 : 0 : static inline void input_report_switch(struct input_dev *dev, unsigned int code, int value)
436 : : {
437 : 0 : input_event(dev, EV_SW, code, !!value);
438 : 0 : }
439 : :
440 : 30 : static inline void input_sync(struct input_dev *dev)
441 : : {
442 : 30 : input_event(dev, EV_SYN, SYN_REPORT, 0);
443 : 0 : }
444 : :
445 : 0 : static inline void input_mt_sync(struct input_dev *dev)
446 : : {
447 : 0 : input_event(dev, EV_SYN, SYN_MT_REPORT, 0);
448 : 0 : }
449 : :
450 : : void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code);
451 : :
452 : : /**
453 : : * input_set_events_per_packet - tell handlers about the driver event rate
454 : : * @dev: the input device used by the driver
455 : : * @n_events: the average number of events between calls to input_sync()
456 : : *
457 : : * If the event rate sent from a device is unusually large, use this
458 : : * function to set the expected event rate. This will allow handlers
459 : : * to set up an appropriate buffer size for the event stream, in order
460 : : * to minimize information loss.
461 : : */
462 : 0 : static inline void input_set_events_per_packet(struct input_dev *dev, int n_events)
463 : : {
464 : 0 : dev->hint_events_per_packet = n_events;
465 : 0 : }
466 : :
467 : : void input_alloc_absinfo(struct input_dev *dev);
468 : : void input_set_abs_params(struct input_dev *dev, unsigned int axis,
469 : : int min, int max, int fuzz, int flat);
470 : :
471 : : #define INPUT_GENERATE_ABS_ACCESSORS(_suffix, _item) \
472 : : static inline int input_abs_get_##_suffix(struct input_dev *dev, \
473 : : unsigned int axis) \
474 : : { \
475 : : return dev->absinfo ? dev->absinfo[axis]._item : 0; \
476 : : } \
477 : : \
478 : : static inline void input_abs_set_##_suffix(struct input_dev *dev, \
479 : : unsigned int axis, int val) \
480 : : { \
481 : : input_alloc_absinfo(dev); \
482 : : if (dev->absinfo) \
483 : : dev->absinfo[axis]._item = val; \
484 : : }
485 : :
486 [ # # # # ]: 0 : INPUT_GENERATE_ABS_ACCESSORS(val, value)
487 [ # # ]: 0 : INPUT_GENERATE_ABS_ACCESSORS(min, minimum)
488 [ # # # # : 0 : INPUT_GENERATE_ABS_ACCESSORS(max, maximum)
# # # # #
# ]
489 [ # # # # : 0 : INPUT_GENERATE_ABS_ACCESSORS(fuzz, fuzz)
# # ]
490 : : INPUT_GENERATE_ABS_ACCESSORS(flat, flat)
491 [ # # # # : 0 : INPUT_GENERATE_ABS_ACCESSORS(res, resolution)
# # # # #
# # # # #
# # # # ]
492 : :
493 : : int input_scancode_to_scalar(const struct input_keymap_entry *ke,
494 : : unsigned int *scancode);
495 : :
496 : : int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke);
497 : : int input_set_keycode(struct input_dev *dev,
498 : : const struct input_keymap_entry *ke);
499 : :
500 : : bool input_match_device_id(const struct input_dev *dev,
501 : : const struct input_device_id *id);
502 : :
503 : : void input_enable_softrepeat(struct input_dev *dev, int delay, int period);
504 : :
505 : : extern struct class input_class;
506 : :
507 : : /**
508 : : * struct ff_device - force-feedback part of an input device
509 : : * @upload: Called to upload an new effect into device
510 : : * @erase: Called to erase an effect from device
511 : : * @playback: Called to request device to start playing specified effect
512 : : * @set_gain: Called to set specified gain
513 : : * @set_autocenter: Called to auto-center device
514 : : * @destroy: called by input core when parent input device is being
515 : : * destroyed
516 : : * @private: driver-specific data, will be freed automatically
517 : : * @ffbit: bitmap of force feedback capabilities truly supported by
518 : : * device (not emulated like ones in input_dev->ffbit)
519 : : * @mutex: mutex for serializing access to the device
520 : : * @max_effects: maximum number of effects supported by device
521 : : * @effects: pointer to an array of effects currently loaded into device
522 : : * @effect_owners: array of effect owners; when file handle owning
523 : : * an effect gets closed the effect is automatically erased
524 : : *
525 : : * Every force-feedback device must implement upload() and playback()
526 : : * methods; erase() is optional. set_gain() and set_autocenter() need
527 : : * only be implemented if driver sets up FF_GAIN and FF_AUTOCENTER
528 : : * bits.
529 : : *
530 : : * Note that playback(), set_gain() and set_autocenter() are called with
531 : : * dev->event_lock spinlock held and interrupts off and thus may not
532 : : * sleep.
533 : : */
534 : : struct ff_device {
535 : : int (*upload)(struct input_dev *dev, struct ff_effect *effect,
536 : : struct ff_effect *old);
537 : : int (*erase)(struct input_dev *dev, int effect_id);
538 : :
539 : : int (*playback)(struct input_dev *dev, int effect_id, int value);
540 : : void (*set_gain)(struct input_dev *dev, u16 gain);
541 : : void (*set_autocenter)(struct input_dev *dev, u16 magnitude);
542 : :
543 : : void (*destroy)(struct ff_device *);
544 : :
545 : : void *private;
546 : :
547 : : unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
548 : :
549 : : struct mutex mutex;
550 : :
551 : : int max_effects;
552 : : struct ff_effect *effects;
553 : : struct file *effect_owners[];
554 : : };
555 : :
556 : : int input_ff_create(struct input_dev *dev, unsigned int max_effects);
557 : : void input_ff_destroy(struct input_dev *dev);
558 : :
559 : : int input_ff_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);
560 : :
561 : : int input_ff_upload(struct input_dev *dev, struct ff_effect *effect, struct file *file);
562 : : int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file);
563 : : int input_ff_flush(struct input_dev *dev, struct file *file);
564 : :
565 : : int input_ff_create_memless(struct input_dev *dev, void *data,
566 : : int (*play_effect)(struct input_dev *, void *, struct ff_effect *));
567 : :
568 : : #endif
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