include/linux/input/sparse-keymap.h

   1 #ifndef _SPARSE_KEYMAP_H
   2 #define _SPARSE_KEYMAP_H
   3
   4 /*
   5  * Copyright (c) 2009 Dmitry Torokhov
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  */
  11
  12 #define KE_END          0       /* Indicates end of keymap */
  13 #define KE_KEY          1       /* Ordinary key/button */
  14 #define KE_SW           2       /* Switch (predetermined value) */
  15 #define KE_VSW          3       /* Switch (value supplied at runtime) */
  16 #define KE_IGNORE       4       /* Known entry that should be ignored */
  17 #define KE_LAST         KE_IGNORE
  18
  19 /**
  20  * struct key_entry - keymap entry for use in sparse keymap
  21  * @type: Type of the key entry (KE_KEY, KE_SW, KE_VSW, KE_END);
  22  *      drivers are allowed to extend the list with their own
  23  *      private definitions.
  24  * @code: Device-specific data identifying the button/switch
  25  * @keycode: KEY_* code assigned to a key/button
  26  * @sw.code: SW_* code assigned to a switch
  27  * @sw.value: Value that should be sent in an input even when KE_SW
  28  *      switch is toggled. KE_VSW switches ignore this field and
  29  *      expect driver to supply value for the event.
  30  *
  31  * This structure defines an entry in a sparse keymap used by some
  32  * input devices for which traditional table-based approach is not
  33  * suitable.
  34  */
  35 struct key_entry {
  36         int type;               /* See KE_* above */
  37         u32 code;
  38         union {
  39                 u16 keycode;            /* For KE_KEY */
  40                 struct {                /* For KE_SW, KE_VSW */
  41                         u8 code;
  42                         u8 value;       /* For KE_SW, ignored by KE_VSW */
  43                 } sw;
  44         };
  45 };
  46
  47 struct key_entry *sparse_keymap_entry_from_scancode(struct input_dev *dev,
  48                                                     unsigned int code);
  49 struct key_entry *sparse_keymap_entry_from_keycode(struct input_dev *dev,
  50                                                    unsigned int code);
  51 int sparse_keymap_setup(struct input_dev *dev,
  52                         const struct key_entry *keymap,
  53                         int (*setup)(struct input_dev *, struct key_entry *));
  54 void sparse_keymap_free(struct input_dev *dev);
  55
  56 void sparse_keymap_report_entry(struct input_dev *dev, const struct key_entry *ke,
  57                                 unsigned int value, bool autorelease);
  58
  59 bool sparse_keymap_report_event(struct input_dev *dev, unsigned int code,
  60                                 unsigned int value, bool autorelease);
  61
  62 #endif /* _SPARSE_KEYMAP_H */