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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
1da177e4 LT |
2 | /* |
3 | * Copyright (c) 1999-2002 Vojtech Pavlik | |
1da177e4 | 4 | */ |
607ca46e DH |
5 | #ifndef _INPUT_H |
6 | #define _INPUT_H | |
1da177e4 | 7 | |
1da177e4 LT |
8 | #include <linux/time.h> |
9 | #include <linux/list.h> | |
607ca46e | 10 | #include <uapi/linux/input.h> |
40d007e7 HR |
11 | /* Implementation details, userspace should not care about these */ |
12 | #define ABS_MT_FIRST ABS_MT_TOUCH_MAJOR | |
cab7faca | 13 | #define ABS_MT_LAST ABS_MT_TOOL_Y |
1da177e4 LT |
14 | |
15 | /* | |
16 | * In-kernel definitions. | |
17 | */ | |
18 | ||
ddc5d341 | 19 | #include <linux/device.h> |
1da177e4 LT |
20 | #include <linux/fs.h> |
21 | #include <linux/timer.h> | |
ddc5d341 | 22 | #include <linux/mod_devicetable.h> |
1da177e4 | 23 | |
e95656ea DT |
24 | struct input_dev_poller; |
25 | ||
4369c64c HR |
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 | ||
3b51c44b AN |
38 | enum input_clock_type { |
39 | INPUT_CLK_REAL = 0, | |
40 | INPUT_CLK_MONO, | |
41 | INPUT_CLK_BOOT, | |
42 | INPUT_CLK_MAX | |
43 | }; | |
44 | ||
8006479c DT |
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) | |
85b77200 | 51 | * @propbit: bitmap of device properties and quirks |
8006479c DT |
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 | |
63a6404d HR |
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. | |
8006479c DT |
66 | * @keycodemax: size of keycode table |
67 | * @keycodesize: size of elements in keycode table | |
68 | * @keycode: map of scancodes to keycodes for this device | |
8613e4c2 | 69 | * @getkeycode: optional legacy method to retrieve current keymap. |
8006479c | 70 | * @setkeycode: optional method to alter current keymap, used to implement |
66d2a595 DT |
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 | |
8006479c DT |
74 | * @ff: force feedback structure associated with the device if device |
75 | * supports force feedback effects | |
e95656ea DT |
76 | * @poller: poller structure associated with the device if device is |
77 | * set up to use polling mode | |
8006479c DT |
78 | * @repeat_key: stores key code of the last key pressed; used to implement |
79 | * software autorepeat | |
80 | * @timer: timer for software autorepeat | |
8006479c | 81 | * @rep: current values for autorepeat parameters (delay, rate) |
8d18fba2 | 82 | * @mt: pointer to multitouch state |
86b17f76 | 83 | * @absinfo: array of &struct input_absinfo elements holding information |
d31b2865 DM |
84 | * about absolute axes (current value, min, max, flat, fuzz, |
85 | * resolution) | |
8006479c DT |
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 | |
8006479c DT |
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, | |
a1816164 PF |
93 | * request an IRQ, submit URB, etc.). The meaning of open() is |
94 | * to start providing events to the input core. | |
8006479c | 95 | * @close: this method is called when the very last user calls |
a1816164 PF |
96 | * input_close_device(). The meaning of close() is to stop |
97 | * providing events to the input core. | |
8006479c DT |
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 | |
83510e5f | 108 | * @event_lock: this spinlock is taken when input core receives |
8006479c DT |
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 | |
800963fd HR |
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 | |
2be975c6 DT |
128 | * @devres_managed: indicates that devices is managed with devres framework |
129 | * and needs not be explicitly unregistered or freed. | |
3b51c44b AN |
130 | * @timestamp: storage for a timestamp set by input_set_timestamp called |
131 | * by a driver | |
a1816164 PF |
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. | |
8006479c | 136 | */ |
1da177e4 | 137 | struct input_dev { |
5b6271bd DT |
138 | const char *name; |
139 | const char *phys; | |
140 | const char *uniq; | |
1da177e4 LT |
141 | struct input_id id; |
142 | ||
85b77200 HR |
143 | unsigned long propbit[BITS_TO_LONGS(INPUT_PROP_CNT)]; |
144 | ||
7b19ada2 JS |
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)]; | |
1da177e4 | 154 | |
63a6404d HR |
155 | unsigned int hint_events_per_packet; |
156 | ||
1da177e4 LT |
157 | unsigned int keycodemax; |
158 | unsigned int keycodesize; | |
159 | void *keycode; | |
8613e4c2 | 160 | |
58b93995 | 161 | int (*setkeycode)(struct input_dev *dev, |
aebd636b DT |
162 | const struct input_keymap_entry *ke, |
163 | unsigned int *old_keycode); | |
58b93995 | 164 | int (*getkeycode)(struct input_dev *dev, |
aebd636b | 165 | struct input_keymap_entry *ke); |
1da177e4 | 166 | |
509ca1a9 AH |
167 | struct ff_device *ff; |
168 | ||
e95656ea DT |
169 | struct input_dev_poller *poller; |
170 | ||
1da177e4 LT |
171 | unsigned int repeat_key; |
172 | struct timer_list timer; | |
173 | ||
d31b2865 | 174 | int rep[REP_CNT]; |
1da177e4 | 175 | |
8d18fba2 | 176 | struct input_mt *mt; |
40d007e7 | 177 | |
d31b2865 DM |
178 | struct input_absinfo *absinfo; |
179 | ||
7b19ada2 JS |
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)]; | |
1da177e4 | 184 | |
1da177e4 LT |
185 | int (*open)(struct input_dev *dev); |
186 | void (*close)(struct input_dev *dev); | |
1da177e4 LT |
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); | |
1da177e4 | 189 | |
2be85279 | 190 | struct input_handle __rcu *grab; |
0fbf87ca | 191 | |
8006479c DT |
192 | spinlock_t event_lock; |
193 | struct mutex mutex; | |
194 | ||
0fbf87ca | 195 | unsigned int users; |
ffd0db97 | 196 | bool going_away; |
0fbf87ca | 197 | |
9657d75c | 198 | struct device dev; |
1da177e4 LT |
199 | |
200 | struct list_head h_list; | |
201 | struct list_head node; | |
4369c64c HR |
202 | |
203 | unsigned int num_vals; | |
204 | unsigned int max_vals; | |
205 | struct input_value *vals; | |
2be975c6 DT |
206 | |
207 | bool devres_managed; | |
3b51c44b AN |
208 | |
209 | ktime_t timestamp[INPUT_CLK_MAX]; | |
a1816164 PF |
210 | |
211 | bool inhibited; | |
1da177e4 | 212 | }; |
9657d75c | 213 | #define to_input_dev(d) container_of(d, struct input_dev, dev) |
1da177e4 | 214 | |
ddc5d341 DT |
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 | ||
dc24f0e7 SR |
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 | ||
ddc5d341 DT |
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 | ||
8724ecb0 DT |
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 | ||
ddc5d341 | 263 | #define INPUT_DEVICE_ID_MATCH_DEVICE \ |
1da177e4 | 264 | (INPUT_DEVICE_ID_MATCH_BUS | INPUT_DEVICE_ID_MATCH_VENDOR | INPUT_DEVICE_ID_MATCH_PRODUCT) |
ddc5d341 | 265 | #define INPUT_DEVICE_ID_MATCH_DEVICE_AND_VERSION \ |
1da177e4 LT |
266 | (INPUT_DEVICE_ID_MATCH_DEVICE | INPUT_DEVICE_ID_MATCH_VERSION) |
267 | ||
1da177e4 LT |
268 | struct input_handle; |
269 | ||
c7e8dc6e DT |
270 | /** |
271 | * struct input_handler - implements one of interfaces for input devices | |
272 | * @private: driver-specific data | |
8006479c DT |
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 | |
4369c64c HR |
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 | |
ef7995f4 DT |
279 | * @filter: similar to @event; separates normal event handlers from |
280 | * "filters". | |
0b7024ac DT |
281 | * @match: called after comparing device's id with handler's id_table |
282 | * to perform fine-grained matching between device and handler | |
c7e8dc6e DT |
283 | * @connect: called when attaching a handler to an input device |
284 | * @disconnect: disconnects a handler from input device | |
285 | * @start: starts handler for given handle. This function is called by | |
286 | * input core right after connect() method and also when a process | |
287 | * that "grabbed" a device releases it | |
7f8d4cad DT |
288 | * @legacy_minors: set to %true by drivers using legacy minor ranges |
289 | * @minor: beginning of range of 32 legacy minors for devices this driver | |
c7e8dc6e DT |
290 | * can provide |
291 | * @name: name of the handler, to be shown in /proc/bus/input/handlers | |
292 | * @id_table: pointer to a table of input_device_ids this driver can | |
293 | * handle | |
c7e8dc6e DT |
294 | * @h_list: list of input handles associated with the handler |
295 | * @node: for placing the driver onto input_handler_list | |
8006479c DT |
296 | * |
297 | * Input handlers attach to input devices and create input handles. There | |
298 | * are likely several handlers attached to any given input device at the | |
299 | * same time. All of them will get their copy of input event generated by | |
300 | * the device. | |
301 | * | |
ef7995f4 DT |
302 | * The very same structure is used to implement input filters. Input core |
303 | * allows filters to run first and will not pass event to regular handlers | |
304 | * if any of the filters indicate that the event should be filtered (by | |
305 | * returning %true from their filter() method). | |
306 | * | |
8006479c DT |
307 | * Note that input core serializes calls to connect() and disconnect() |
308 | * methods. | |
c7e8dc6e | 309 | */ |
1da177e4 LT |
310 | struct input_handler { |
311 | ||
312 | void *private; | |
313 | ||
314 | void (*event)(struct input_handle *handle, unsigned int type, unsigned int code, int value); | |
4369c64c HR |
315 | void (*events)(struct input_handle *handle, |
316 | const struct input_value *vals, unsigned int count); | |
ef7995f4 | 317 | bool (*filter)(struct input_handle *handle, unsigned int type, unsigned int code, int value); |
0b7024ac | 318 | bool (*match)(struct input_handler *handler, struct input_dev *dev); |
5b2a0826 | 319 | int (*connect)(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id); |
1da177e4 | 320 | void (*disconnect)(struct input_handle *handle); |
c7e8dc6e | 321 | void (*start)(struct input_handle *handle); |
1da177e4 | 322 | |
7f8d4cad | 323 | bool legacy_minors; |
1da177e4 | 324 | int minor; |
66e66118 | 325 | const char *name; |
1da177e4 | 326 | |
66e66118 | 327 | const struct input_device_id *id_table; |
1da177e4 LT |
328 | |
329 | struct list_head h_list; | |
330 | struct list_head node; | |
331 | }; | |
332 | ||
8006479c DT |
333 | /** |
334 | * struct input_handle - links input device with an input handler | |
335 | * @private: handler-specific data | |
336 | * @open: counter showing whether the handle is 'open', i.e. should deliver | |
337 | * events from its device | |
338 | * @name: name given to the handle by handler that created it | |
339 | * @dev: input device the handle is attached to | |
340 | * @handler: handler that works with the device through this handle | |
341 | * @d_node: used to put the handle on device's list of attached handles | |
342 | * @h_node: used to put the handle on handler's list of handles from which | |
343 | * it gets events | |
344 | */ | |
1da177e4 LT |
345 | struct input_handle { |
346 | ||
347 | void *private; | |
348 | ||
349 | int open; | |
66e66118 | 350 | const char *name; |
1da177e4 LT |
351 | |
352 | struct input_dev *dev; | |
353 | struct input_handler *handler; | |
354 | ||
355 | struct list_head d_node; | |
356 | struct list_head h_node; | |
357 | }; | |
358 | ||
2be975c6 DT |
359 | struct input_dev __must_check *input_allocate_device(void); |
360 | struct input_dev __must_check *devm_input_allocate_device(struct device *); | |
f60d2b11 | 361 | void input_free_device(struct input_dev *dev); |
d19fbe8a | 362 | |
d19fbe8a DT |
363 | static inline struct input_dev *input_get_device(struct input_dev *dev) |
364 | { | |
a7097ff8 | 365 | return dev ? to_input_dev(get_device(&dev->dev)) : NULL; |
d19fbe8a DT |
366 | } |
367 | ||
368 | static inline void input_put_device(struct input_dev *dev) | |
369 | { | |
a7097ff8 DT |
370 | if (dev) |
371 | put_device(&dev->dev); | |
d19fbe8a DT |
372 | } |
373 | ||
3abccf36 DT |
374 | static inline void *input_get_drvdata(struct input_dev *dev) |
375 | { | |
3797fec1 | 376 | return dev_get_drvdata(&dev->dev); |
3abccf36 DT |
377 | } |
378 | ||
379 | static inline void input_set_drvdata(struct input_dev *dev, void *data) | |
380 | { | |
3797fec1 | 381 | dev_set_drvdata(&dev->dev, data); |
3abccf36 DT |
382 | } |
383 | ||
501cc54c | 384 | int __must_check input_register_device(struct input_dev *); |
1da177e4 LT |
385 | void input_unregister_device(struct input_dev *); |
386 | ||
b50b5216 DT |
387 | void input_reset_device(struct input_dev *); |
388 | ||
e95656ea DT |
389 | int input_setup_polling(struct input_dev *dev, |
390 | void (*poll_fn)(struct input_dev *dev)); | |
391 | void input_set_poll_interval(struct input_dev *dev, unsigned int interval); | |
392 | void input_set_min_poll_interval(struct input_dev *dev, unsigned int interval); | |
393 | void input_set_max_poll_interval(struct input_dev *dev, unsigned int interval); | |
894616f7 | 394 | int input_get_poll_interval(struct input_dev *dev); |
e95656ea | 395 | |
501cc54c | 396 | int __must_check input_register_handler(struct input_handler *); |
1da177e4 LT |
397 | void input_unregister_handler(struct input_handler *); |
398 | ||
7f8d4cad DT |
399 | int __must_check input_get_new_minor(int legacy_base, unsigned int legacy_num, |
400 | bool allow_dynamic); | |
401 | void input_free_minor(unsigned int minor); | |
402 | ||
66d2a595 DT |
403 | int input_handler_for_each_handle(struct input_handler *, void *data, |
404 | int (*fn)(struct input_handle *, void *)); | |
405 | ||
5b2a0826 DT |
406 | int input_register_handle(struct input_handle *); |
407 | void input_unregister_handle(struct input_handle *); | |
408 | ||
1da177e4 LT |
409 | int input_grab_device(struct input_handle *); |
410 | void input_release_device(struct input_handle *); | |
411 | ||
412 | int input_open_device(struct input_handle *); | |
413 | void input_close_device(struct input_handle *); | |
414 | ||
b50b5216 | 415 | int input_flush_device(struct input_handle *handle, struct file *file); |
1da177e4 | 416 | |
3b51c44b AN |
417 | void input_set_timestamp(struct input_dev *dev, ktime_t timestamp); |
418 | ktime_t *input_get_timestamp(struct input_dev *dev); | |
419 | ||
1da177e4 | 420 | void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value); |
0e739d28 | 421 | void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value); |
1da177e4 LT |
422 | |
423 | static inline void input_report_key(struct input_dev *dev, unsigned int code, int value) | |
424 | { | |
425 | input_event(dev, EV_KEY, code, !!value); | |
426 | } | |
427 | ||
428 | static inline void input_report_rel(struct input_dev *dev, unsigned int code, int value) | |
429 | { | |
430 | input_event(dev, EV_REL, code, value); | |
431 | } | |
432 | ||
433 | static inline void input_report_abs(struct input_dev *dev, unsigned int code, int value) | |
434 | { | |
435 | input_event(dev, EV_ABS, code, value); | |
436 | } | |
437 | ||
1da177e4 LT |
438 | static inline void input_report_ff_status(struct input_dev *dev, unsigned int code, int value) |
439 | { | |
440 | input_event(dev, EV_FF_STATUS, code, value); | |
441 | } | |
442 | ||
31581066 RP |
443 | static inline void input_report_switch(struct input_dev *dev, unsigned int code, int value) |
444 | { | |
445 | input_event(dev, EV_SW, code, !!value); | |
446 | } | |
447 | ||
1da177e4 LT |
448 | static inline void input_sync(struct input_dev *dev) |
449 | { | |
450 | input_event(dev, EV_SYN, SYN_REPORT, 0); | |
1da177e4 LT |
451 | } |
452 | ||
5e5ee686 HR |
453 | static inline void input_mt_sync(struct input_dev *dev) |
454 | { | |
455 | input_event(dev, EV_SYN, SYN_MT_REPORT, 0); | |
456 | } | |
457 | ||
534565f2 DT |
458 | void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code); |
459 | ||
63a6404d HR |
460 | /** |
461 | * input_set_events_per_packet - tell handlers about the driver event rate | |
462 | * @dev: the input device used by the driver | |
463 | * @n_events: the average number of events between calls to input_sync() | |
464 | * | |
465 | * If the event rate sent from a device is unusually large, use this | |
466 | * function to set the expected event rate. This will allow handlers | |
467 | * to set up an appropriate buffer size for the event stream, in order | |
468 | * to minimize information loss. | |
469 | */ | |
470 | static inline void input_set_events_per_packet(struct input_dev *dev, int n_events) | |
471 | { | |
472 | dev->hint_events_per_packet = n_events; | |
473 | } | |
474 | ||
d31b2865 DM |
475 | void input_alloc_absinfo(struct input_dev *dev); |
476 | void input_set_abs_params(struct input_dev *dev, unsigned int axis, | |
477 | int min, int max, int fuzz, int flat); | |
1da177e4 | 478 | |
7957e9c4 DM |
479 | #define INPUT_GENERATE_ABS_ACCESSORS(_suffix, _item) \ |
480 | static inline int input_abs_get_##_suffix(struct input_dev *dev, \ | |
481 | unsigned int axis) \ | |
482 | { \ | |
d31b2865 | 483 | return dev->absinfo ? dev->absinfo[axis]._item : 0; \ |
7957e9c4 DM |
484 | } \ |
485 | \ | |
486 | static inline void input_abs_set_##_suffix(struct input_dev *dev, \ | |
487 | unsigned int axis, int val) \ | |
488 | { \ | |
d31b2865 DM |
489 | input_alloc_absinfo(dev); \ |
490 | if (dev->absinfo) \ | |
491 | dev->absinfo[axis]._item = val; \ | |
7957e9c4 DM |
492 | } |
493 | ||
d31b2865 DM |
494 | INPUT_GENERATE_ABS_ACCESSORS(val, value) |
495 | INPUT_GENERATE_ABS_ACCESSORS(min, minimum) | |
496 | INPUT_GENERATE_ABS_ACCESSORS(max, maximum) | |
7957e9c4 DM |
497 | INPUT_GENERATE_ABS_ACCESSORS(fuzz, fuzz) |
498 | INPUT_GENERATE_ABS_ACCESSORS(flat, flat) | |
d31b2865 | 499 | INPUT_GENERATE_ABS_ACCESSORS(res, resolution) |
7957e9c4 | 500 | |
8613e4c2 MCC |
501 | int input_scancode_to_scalar(const struct input_keymap_entry *ke, |
502 | unsigned int *scancode); | |
503 | ||
504 | int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke); | |
58b93995 | 505 | int input_set_keycode(struct input_dev *dev, |
8613e4c2 | 506 | const struct input_keymap_entry *ke); |
f4f37c8e | 507 | |
55dfce87 DT |
508 | bool input_match_device_id(const struct input_dev *dev, |
509 | const struct input_device_id *id); | |
510 | ||
027c71bb PG |
511 | void input_enable_softrepeat(struct input_dev *dev, int delay, int period); |
512 | ||
39be39ce AP |
513 | bool input_device_enabled(struct input_dev *dev); |
514 | ||
ea9f240b | 515 | extern struct class input_class; |
1da177e4 | 516 | |
509ca1a9 AH |
517 | /** |
518 | * struct ff_device - force-feedback part of an input device | |
519 | * @upload: Called to upload an new effect into device | |
520 | * @erase: Called to erase an effect from device | |
521 | * @playback: Called to request device to start playing specified effect | |
522 | * @set_gain: Called to set specified gain | |
523 | * @set_autocenter: Called to auto-center device | |
524 | * @destroy: called by input core when parent input device is being | |
525 | * destroyed | |
526 | * @private: driver-specific data, will be freed automatically | |
527 | * @ffbit: bitmap of force feedback capabilities truly supported by | |
528 | * device (not emulated like ones in input_dev->ffbit) | |
529 | * @mutex: mutex for serializing access to the device | |
530 | * @max_effects: maximum number of effects supported by device | |
531 | * @effects: pointer to an array of effects currently loaded into device | |
532 | * @effect_owners: array of effect owners; when file handle owning | |
8006479c | 533 | * an effect gets closed the effect is automatically erased |
509ca1a9 AH |
534 | * |
535 | * Every force-feedback device must implement upload() and playback() | |
536 | * methods; erase() is optional. set_gain() and set_autocenter() need | |
537 | * only be implemented if driver sets up FF_GAIN and FF_AUTOCENTER | |
538 | * bits. | |
bf3204cb DT |
539 | * |
540 | * Note that playback(), set_gain() and set_autocenter() are called with | |
541 | * dev->event_lock spinlock held and interrupts off and thus may not | |
542 | * sleep. | |
509ca1a9 AH |
543 | */ |
544 | struct ff_device { | |
545 | int (*upload)(struct input_dev *dev, struct ff_effect *effect, | |
546 | struct ff_effect *old); | |
547 | int (*erase)(struct input_dev *dev, int effect_id); | |
548 | ||
549 | int (*playback)(struct input_dev *dev, int effect_id, int value); | |
550 | void (*set_gain)(struct input_dev *dev, u16 gain); | |
551 | void (*set_autocenter)(struct input_dev *dev, u16 magnitude); | |
552 | ||
553 | void (*destroy)(struct ff_device *); | |
554 | ||
555 | void *private; | |
556 | ||
7b19ada2 | 557 | unsigned long ffbit[BITS_TO_LONGS(FF_CNT)]; |
509ca1a9 AH |
558 | |
559 | struct mutex mutex; | |
560 | ||
561 | int max_effects; | |
562 | struct ff_effect *effects; | |
563 | struct file *effect_owners[]; | |
564 | }; | |
565 | ||
05be8b81 | 566 | int input_ff_create(struct input_dev *dev, unsigned int max_effects); |
509ca1a9 AH |
567 | void input_ff_destroy(struct input_dev *dev); |
568 | ||
569 | int input_ff_event(struct input_dev *dev, unsigned int type, unsigned int code, int value); | |
570 | ||
571 | int input_ff_upload(struct input_dev *dev, struct ff_effect *effect, struct file *file); | |
572 | int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file); | |
e8b95728 | 573 | int input_ff_flush(struct input_dev *dev, struct file *file); |
509ca1a9 | 574 | |
7d928a2b AH |
575 | int input_ff_create_memless(struct input_dev *dev, void *data, |
576 | int (*play_effect)(struct input_dev *, void *, struct ff_effect *)); | |
577 | ||
1da177e4 | 578 | #endif |