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.). The meaning of open() is
94   *	to start providing events to the input core.
95   * @close: this method is called when the very last user calls
96   *	input_close_device(). The meaning of close() is to stop
97   *	providing events to the input core.
98   * @flush: purges the device. Most commonly used to get rid of force
99   *	feedback effects loaded into the device when disconnecting
100   *	from it
101   * @event: event handler for events sent _to_ the device, like EV_LED
102   *	or EV_SND. The device is expected to carry out the requested
103   *	action (turn on a LED, play sound, etc.) The call is protected
104   *	by @event_lock and must not sleep
105   * @grab: input handle that currently has the device grabbed (via
106   *	EVIOCGRAB ioctl). When a handle grabs a device it becomes sole
107   *	recipient for all input events coming from the device
108   * @event_lock: this spinlock is taken when input core receives
109   *	and processes a new event for the device (in input_event()).
110   *	Code that accesses and/or modifies parameters of a device
111   *	(such as keymap or absmin, absmax, absfuzz, etc.) after device
112   *	has been registered with input core must take this lock.
113   * @mutex: serializes calls to open(), close() and flush() methods
114   * @users: stores number of users (input handlers) that opened this
115   *	device. It is used by input_open_device() and input_close_device()
116   *	to make sure that dev->open() is only called when the first
117   *	user opens device and dev->close() is called when the very
118   *	last user closes the device
119   * @going_away: marks devices that are in a middle of unregistering and
120   *	causes input_open_device*() fail with -ENODEV.
121   * @dev: driver model's view of this device
122   * @h_list: list of input handles associated with the device. When
123   *	accessing the list dev->mutex must be held
124   * @node: used to place the device onto input_dev_list
125   * @num_vals: number of values queued in the current frame
126   * @max_vals: maximum number of values queued in a frame
127   * @vals: array of values queued in the current frame
128   * @devres_managed: indicates that devices is managed with devres framework
129   *	and needs not be explicitly unregistered or freed.
130   * @timestamp: storage for a timestamp set by input_set_timestamp called
131   *  by a driver
132   * @inhibited: indicates that the input device is inhibited. If that is
133   * the case then input core ignores any events generated by the device.
134   * Device's close() is called when it is being inhibited and its open()
135   * is called when it is being uninhibited.
136   */
137  struct input_dev {
138  	const char *name;
139  	const char *phys;
140  	const char *uniq;
141  	struct input_id id;
142  
143  	unsigned long propbit[BITS_TO_LONGS(INPUT_PROP_CNT)];
144  
145  	unsigned long evbit[BITS_TO_LONGS(EV_CNT)];
146  	unsigned long keybit[BITS_TO_LONGS(KEY_CNT)];
147  	unsigned long relbit[BITS_TO_LONGS(REL_CNT)];
148  	unsigned long absbit[BITS_TO_LONGS(ABS_CNT)];
149  	unsigned long mscbit[BITS_TO_LONGS(MSC_CNT)];
150  	unsigned long ledbit[BITS_TO_LONGS(LED_CNT)];
151  	unsigned long sndbit[BITS_TO_LONGS(SND_CNT)];
152  	unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
153  	unsigned long swbit[BITS_TO_LONGS(SW_CNT)];
154  
155  	unsigned int hint_events_per_packet;
156  
157  	unsigned int keycodemax;
158  	unsigned int keycodesize;
159  	void *keycode;
160  
161  	int (*setkeycode)(struct input_dev *dev,
162  			  const struct input_keymap_entry *ke,
163  			  unsigned int *old_keycode);
164  	int (*getkeycode)(struct input_dev *dev,
165  			  struct input_keymap_entry *ke);
166  
167  	struct ff_device *ff;
168  
169  	struct input_dev_poller *poller;
170  
171  	unsigned int repeat_key;
172  	struct timer_list timer;
173  
174  	int rep[REP_CNT];
175  
176  	struct input_mt *mt;
177  
178  	struct input_absinfo *absinfo;
179  
180  	unsigned long key[BITS_TO_LONGS(KEY_CNT)];
181  	unsigned long led[BITS_TO_LONGS(LED_CNT)];
182  	unsigned long snd[BITS_TO_LONGS(SND_CNT)];
183  	unsigned long sw[BITS_TO_LONGS(SW_CNT)];
184  
185  	int (*open)(struct input_dev *dev);
186  	void (*close)(struct input_dev *dev);
187  	int (*flush)(struct input_dev *dev, struct file *file);
188  	int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
189  
190  	struct input_handle __rcu *grab;
191  
192  	spinlock_t event_lock;
193  	struct mutex mutex;
194  
195  	unsigned int users;
196  	bool going_away;
197  
198  	struct device dev;
199  
200  	struct list_head	h_list;
201  	struct list_head	node;
202  
203  	unsigned int num_vals;
204  	unsigned int max_vals;
205  	struct input_value *vals;
206  
207  	bool devres_managed;
208  
209  	ktime_t timestamp[INPUT_CLK_MAX];
210  
211  	bool inhibited;
212  };
213  #define to_input_dev(d) container_of(d, struct input_dev, dev)
214  
215  /*
216   * Verify that we are in sync with input_device_id mod_devicetable.h #defines
217   */
218  
219  #if EV_MAX != INPUT_DEVICE_ID_EV_MAX
220  #error "EV_MAX and INPUT_DEVICE_ID_EV_MAX do not match"
221  #endif
222  
223  #if KEY_MIN_INTERESTING != INPUT_DEVICE_ID_KEY_MIN_INTERESTING
224  #error "KEY_MIN_INTERESTING and INPUT_DEVICE_ID_KEY_MIN_INTERESTING do not match"
225  #endif
226  
227  #if KEY_MAX != INPUT_DEVICE_ID_KEY_MAX
228  #error "KEY_MAX and INPUT_DEVICE_ID_KEY_MAX do not match"
229  #endif
230  
231  #if REL_MAX != INPUT_DEVICE_ID_REL_MAX
232  #error "REL_MAX and INPUT_DEVICE_ID_REL_MAX do not match"
233  #endif
234  
235  #if ABS_MAX != INPUT_DEVICE_ID_ABS_MAX
236  #error "ABS_MAX and INPUT_DEVICE_ID_ABS_MAX do not match"
237  #endif
238  
239  #if MSC_MAX != INPUT_DEVICE_ID_MSC_MAX
240  #error "MSC_MAX and INPUT_DEVICE_ID_MSC_MAX do not match"
241  #endif
242  
243  #if LED_MAX != INPUT_DEVICE_ID_LED_MAX
244  #error "LED_MAX and INPUT_DEVICE_ID_LED_MAX do not match"
245  #endif
246  
247  #if SND_MAX != INPUT_DEVICE_ID_SND_MAX
248  #error "SND_MAX and INPUT_DEVICE_ID_SND_MAX do not match"
249  #endif
250  
251  #if FF_MAX != INPUT_DEVICE_ID_FF_MAX
252  #error "FF_MAX and INPUT_DEVICE_ID_FF_MAX do not match"
253  #endif
254  
255  #if SW_MAX != INPUT_DEVICE_ID_SW_MAX
256  #error "SW_MAX and INPUT_DEVICE_ID_SW_MAX do not match"
257  #endif
258  
259  #if INPUT_PROP_MAX != INPUT_DEVICE_ID_PROP_MAX
260  #error "INPUT_PROP_MAX and INPUT_DEVICE_ID_PROP_MAX do not match"
261  #endif
262  
263  #define INPUT_DEVICE_ID_MATCH_DEVICE \
264  	(INPUT_DEVICE_ID_MATCH_BUS | INPUT_DEVICE_ID_MATCH_VENDOR | INPUT_DEVICE_ID_MATCH_PRODUCT)
265  #define INPUT_DEVICE_ID_MATCH_DEVICE_AND_VERSION \
266  	(INPUT_DEVICE_ID_MATCH_DEVICE | INPUT_DEVICE_ID_MATCH_VERSION)
267  
268  struct input_handle;
269  
270  /**
271   * struct input_handler - implements one of interfaces for input devices
272   * @private: driver-specific data
273   * @event: event handler. This method is being called by input core with
274   *	interrupts disabled and dev->event_lock spinlock held and so
275   *	it may not sleep
276   * @events: event sequence handler. This method is being called by
277   *	input core with interrupts disabled and dev->event_lock
278   *	spinlock held and so it may not sleep. The method must return
279   *	number of events passed to it.
280   * @filter: similar to @event; separates normal event handlers from
281   *	"filters".
282   * @match: called after comparing device's id with handler's id_table
283   *	to perform fine-grained matching between device and handler
284   * @connect: called when attaching a handler to an input device
285   * @disconnect: disconnects a handler from input device
286   * @start: starts handler for given handle. This function is called by
287   *	input core right after connect() method and also when a process
288   *	that "grabbed" a device releases it
289   * @legacy_minors: set to %true by drivers using legacy minor ranges
290   * @minor: beginning of range of 32 legacy minors for devices this driver
291   *	can provide
292   * @name: name of the handler, to be shown in /proc/bus/input/handlers
293   * @id_table: pointer to a table of input_device_ids this driver can
294   *	handle
295   * @h_list: list of input handles associated with the handler
296   * @node: for placing the driver onto input_handler_list
297   *
298   * Input handlers attach to input devices and create input handles. There
299   * are likely several handlers attached to any given input device at the
300   * same time. All of them will get their copy of input event generated by
301   * the device.
302   *
303   * The very same structure is used to implement input filters. Input core
304   * allows filters to run first and will not pass event to regular handlers
305   * if any of the filters indicate that the event should be filtered (by
306   * returning %true from their filter() method).
307   *
308   * Note that input core serializes calls to connect() and disconnect()
309   * methods.
310   */
311  struct input_handler {
312  
313  	void *private;
314  
315  	void (*event)(struct input_handle *handle, unsigned int type, unsigned int code, int value);
316  	unsigned int (*events)(struct input_handle *handle,
317  			       struct input_value *vals, unsigned int count);
318  	bool (*filter)(struct input_handle *handle, unsigned int type, unsigned int code, int value);
319  	bool (*match)(struct input_handler *handler, struct input_dev *dev);
320  	int (*connect)(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id);
321  	void (*disconnect)(struct input_handle *handle);
322  	void (*start)(struct input_handle *handle);
323  
324  	bool legacy_minors;
325  	int minor;
326  	const char *name;
327  
328  	const struct input_device_id *id_table;
329  
330  	struct list_head	h_list;
331  	struct list_head	node;
332  };
333  
334  /**
335   * struct input_handle - links input device with an input handler
336   * @private: handler-specific data
337   * @open: counter showing whether the handle is 'open', i.e. should deliver
338   *	events from its device
339   * @name: name given to the handle by handler that created it
340   * @dev: input device the handle is attached to
341   * @handler: handler that works with the device through this handle
342   * @handle_events: event sequence handler. It is set up by the input core
343   *	according to event handling method specified in the @handler. See
344   *	input_handle_setup_event_handler().
345   *	This method is being called by the input core with interrupts disabled
346   *	and dev->event_lock spinlock held and so it may not sleep.
347   * @d_node: used to put the handle on device's list of attached handles
348   * @h_node: used to put the handle on handler's list of handles from which
349   *	it gets events
350   */
351  struct input_handle {
352  	void *private;
353  
354  	int open;
355  	const char *name;
356  
357  	struct input_dev *dev;
358  	struct input_handler *handler;
359  
360  	unsigned int (*handle_events)(struct input_handle *handle,
361  				      struct input_value *vals,
362  				      unsigned int count);
363  
364  	struct list_head	d_node;
365  	struct list_head	h_node;
366  };
367  
368  struct input_dev __must_check *input_allocate_device(void);
369  struct input_dev __must_check *devm_input_allocate_device(struct device *);
370  void input_free_device(struct input_dev *dev);
371  
input_get_device(struct input_dev * dev)372  static inline struct input_dev *input_get_device(struct input_dev *dev)
373  {
374  	return dev ? to_input_dev(get_device(&dev->dev)) : NULL;
375  }
376  
input_put_device(struct input_dev * dev)377  static inline void input_put_device(struct input_dev *dev)
378  {
379  	if (dev)
380  		put_device(&dev->dev);
381  }
382  
input_get_drvdata(struct input_dev * dev)383  static inline void *input_get_drvdata(struct input_dev *dev)
384  {
385  	return dev_get_drvdata(&dev->dev);
386  }
387  
input_set_drvdata(struct input_dev * dev,void * data)388  static inline void input_set_drvdata(struct input_dev *dev, void *data)
389  {
390  	dev_set_drvdata(&dev->dev, data);
391  }
392  
393  int __must_check input_register_device(struct input_dev *);
394  void input_unregister_device(struct input_dev *);
395  
396  void input_reset_device(struct input_dev *);
397  
398  int input_setup_polling(struct input_dev *dev,
399  			void (*poll_fn)(struct input_dev *dev));
400  void input_set_poll_interval(struct input_dev *dev, unsigned int interval);
401  void input_set_min_poll_interval(struct input_dev *dev, unsigned int interval);
402  void input_set_max_poll_interval(struct input_dev *dev, unsigned int interval);
403  int input_get_poll_interval(struct input_dev *dev);
404  
405  int __must_check input_register_handler(struct input_handler *);
406  void input_unregister_handler(struct input_handler *);
407  
408  int __must_check input_get_new_minor(int legacy_base, unsigned int legacy_num,
409  				     bool allow_dynamic);
410  void input_free_minor(unsigned int minor);
411  
412  int input_handler_for_each_handle(struct input_handler *, void *data,
413  				  int (*fn)(struct input_handle *, void *));
414  
415  int input_register_handle(struct input_handle *);
416  void input_unregister_handle(struct input_handle *);
417  
418  int input_grab_device(struct input_handle *);
419  void input_release_device(struct input_handle *);
420  
421  int input_open_device(struct input_handle *);
422  void input_close_device(struct input_handle *);
423  
424  int input_flush_device(struct input_handle *handle, struct file *file);
425  
426  void input_set_timestamp(struct input_dev *dev, ktime_t timestamp);
427  ktime_t *input_get_timestamp(struct input_dev *dev);
428  
429  void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);
430  void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value);
431  
input_report_key(struct input_dev * dev,unsigned int code,int value)432  static inline void input_report_key(struct input_dev *dev, unsigned int code, int value)
433  {
434  	input_event(dev, EV_KEY, code, !!value);
435  }
436  
input_report_rel(struct input_dev * dev,unsigned int code,int value)437  static inline void input_report_rel(struct input_dev *dev, unsigned int code, int value)
438  {
439  	input_event(dev, EV_REL, code, value);
440  }
441  
input_report_abs(struct input_dev * dev,unsigned int code,int value)442  static inline void input_report_abs(struct input_dev *dev, unsigned int code, int value)
443  {
444  	input_event(dev, EV_ABS, code, value);
445  }
446  
input_report_ff_status(struct input_dev * dev,unsigned int code,int value)447  static inline void input_report_ff_status(struct input_dev *dev, unsigned int code, int value)
448  {
449  	input_event(dev, EV_FF_STATUS, code, value);
450  }
451  
input_report_switch(struct input_dev * dev,unsigned int code,int value)452  static inline void input_report_switch(struct input_dev *dev, unsigned int code, int value)
453  {
454  	input_event(dev, EV_SW, code, !!value);
455  }
456  
input_sync(struct input_dev * dev)457  static inline void input_sync(struct input_dev *dev)
458  {
459  	input_event(dev, EV_SYN, SYN_REPORT, 0);
460  }
461  
input_mt_sync(struct input_dev * dev)462  static inline void input_mt_sync(struct input_dev *dev)
463  {
464  	input_event(dev, EV_SYN, SYN_MT_REPORT, 0);
465  }
466  
467  void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code);
468  
469  /**
470   * input_set_events_per_packet - tell handlers about the driver event rate
471   * @dev: the input device used by the driver
472   * @n_events: the average number of events between calls to input_sync()
473   *
474   * If the event rate sent from a device is unusually large, use this
475   * function to set the expected event rate. This will allow handlers
476   * to set up an appropriate buffer size for the event stream, in order
477   * to minimize information loss.
478   */
input_set_events_per_packet(struct input_dev * dev,int n_events)479  static inline void input_set_events_per_packet(struct input_dev *dev, int n_events)
480  {
481  	dev->hint_events_per_packet = n_events;
482  }
483  
484  void input_alloc_absinfo(struct input_dev *dev);
485  void input_set_abs_params(struct input_dev *dev, unsigned int axis,
486  			  int min, int max, int fuzz, int flat);
487  void input_copy_abs(struct input_dev *dst, unsigned int dst_axis,
488  		    const struct input_dev *src, unsigned int src_axis);
489  
490  #define INPUT_GENERATE_ABS_ACCESSORS(_suffix, _item)			\
491  static inline int input_abs_get_##_suffix(struct input_dev *dev,	\
492  					  unsigned int axis)		\
493  {									\
494  	return dev->absinfo ? dev->absinfo[axis]._item : 0;		\
495  }									\
496  									\
497  static inline void input_abs_set_##_suffix(struct input_dev *dev,	\
498  					   unsigned int axis, int val)	\
499  {									\
500  	input_alloc_absinfo(dev);					\
501  	if (dev->absinfo)						\
502  		dev->absinfo[axis]._item = val;				\
503  }
504  
505  INPUT_GENERATE_ABS_ACCESSORS(val, value)
506  INPUT_GENERATE_ABS_ACCESSORS(min, minimum)
507  INPUT_GENERATE_ABS_ACCESSORS(max, maximum)
508  INPUT_GENERATE_ABS_ACCESSORS(fuzz, fuzz)
509  INPUT_GENERATE_ABS_ACCESSORS(flat, flat)
510  INPUT_GENERATE_ABS_ACCESSORS(res, resolution)
511  
512  int input_scancode_to_scalar(const struct input_keymap_entry *ke,
513  			     unsigned int *scancode);
514  
515  int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke);
516  int input_set_keycode(struct input_dev *dev,
517  		      const struct input_keymap_entry *ke);
518  
519  bool input_match_device_id(const struct input_dev *dev,
520  			   const struct input_device_id *id);
521  
522  void input_enable_softrepeat(struct input_dev *dev, int delay, int period);
523  
524  bool input_device_enabled(struct input_dev *dev);
525  
526  extern const struct class input_class;
527  
528  /**
529   * struct ff_device - force-feedback part of an input device
530   * @upload: Called to upload an new effect into device
531   * @erase: Called to erase an effect from device
532   * @playback: Called to request device to start playing specified effect
533   * @set_gain: Called to set specified gain
534   * @set_autocenter: Called to auto-center device
535   * @destroy: called by input core when parent input device is being
536   *	destroyed
537   * @private: driver-specific data, will be freed automatically
538   * @ffbit: bitmap of force feedback capabilities truly supported by
539   *	device (not emulated like ones in input_dev->ffbit)
540   * @mutex: mutex for serializing access to the device
541   * @max_effects: maximum number of effects supported by device
542   * @effects: pointer to an array of effects currently loaded into device
543   * @effect_owners: array of effect owners; when file handle owning
544   *	an effect gets closed the effect is automatically erased
545   *
546   * Every force-feedback device must implement upload() and playback()
547   * methods; erase() is optional. set_gain() and set_autocenter() need
548   * only be implemented if driver sets up FF_GAIN and FF_AUTOCENTER
549   * bits.
550   *
551   * Note that playback(), set_gain() and set_autocenter() are called with
552   * dev->event_lock spinlock held and interrupts off and thus may not
553   * sleep.
554   */
555  struct ff_device {
556  	int (*upload)(struct input_dev *dev, struct ff_effect *effect,
557  		      struct ff_effect *old);
558  	int (*erase)(struct input_dev *dev, int effect_id);
559  
560  	int (*playback)(struct input_dev *dev, int effect_id, int value);
561  	void (*set_gain)(struct input_dev *dev, u16 gain);
562  	void (*set_autocenter)(struct input_dev *dev, u16 magnitude);
563  
564  	void (*destroy)(struct ff_device *);
565  
566  	void *private;
567  
568  	unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
569  
570  	struct mutex mutex;
571  
572  	int max_effects;
573  	struct ff_effect *effects;
574  	struct file *effect_owners[] __counted_by(max_effects);
575  };
576  
577  int input_ff_create(struct input_dev *dev, unsigned int max_effects);
578  void input_ff_destroy(struct input_dev *dev);
579  
580  int input_ff_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);
581  
582  int input_ff_upload(struct input_dev *dev, struct ff_effect *effect, struct file *file);
583  int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file);
584  int input_ff_flush(struct input_dev *dev, struct file *file);
585  
586  int input_ff_create_memless(struct input_dev *dev, void *data,
587  		int (*play_effect)(struct input_dev *, void *, struct ff_effect *));
588  
589  #endif
590