sparse-keymap.h

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#ifndef _SPARSE_KEYMAP_H
#define _SPARSE_KEYMAP_H

/*
 * Copyright (c) 2009 Dmitry Torokhov
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#define KE_END      0   /* Indicates end of keymap */
#define KE_KEY      1   /* Ordinary key/button */
#define KE_SW       2   /* Switch (predetermined value) */
#define KE_VSW      3   /* Switch (value supplied at runtime) */
#define KE_IGNORE   4   /* Known entry that should be ignored */
#define KE_LAST     KE_IGNORE

struct key_entry {
    int type;       /* See KE_* above */
    u32 code;
    union {
        u16 keycode;        /* For KE_KEY */
        struct {        /* For KE_SW, KE_VSW */
            u8 code;
            u8 value;   /* For KE_SW, ignored by KE_VSW */
        } sw;
    };
};

struct key_entry *sparse_keymap_entry_from_scancode(struct input_dev *dev,
                            unsigned int code);
struct key_entry *sparse_keymap_entry_from_keycode(struct input_dev *dev,
                           unsigned int code);
int sparse_keymap_setup(struct input_dev *dev,
            const struct key_entry *keymap,
            int (*setup)(struct input_dev *, struct key_entry *));
void sparse_keymap_free(struct input_dev *dev);

void sparse_keymap_report_entry(struct input_dev *dev, const struct key_entry *ke,
                unsigned int value, bool autorelease);

bool sparse_keymap_report_event(struct input_dev *dev, unsigned int code,
                unsigned int value, bool autorelease);

#endif /* _SPARSE_KEYMAP_H */