/* $NetBSD: lcdkp_subr.h,v 1.3 2011/05/14 02:58:27 rmind Exp $ */

/*
* Copyright (c) 2002 Dennis I. Chernoivanov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _DEV_IC_LCDKP_SUBR_H_
#define _DEV_IC_LCDKP_SUBR_H_

#ifdef _KERNEL

/* Key code translation */
struct lcdkp_xlate {
       u_int8_t x_keycode;
       u_int8_t x_outcode;
};

/* Keypad control structure */
struct lcdkp_chip {
       bus_space_tag_t sc_iot;
       bus_space_handle_t sc_ioh;      /* keypad i/o register */

#define LCDKP_HAS_BUF   0x1
       u_char sc_flags;
       u_int8_t sc_buf;                /* pending character */

       u_int8_t sc_knum;               /* number of buttons */
       struct lcdkp_xlate *sc_kpad;    /* recognized keycodes */

       u_int8_t (* sc_rread)(bus_space_tag_t, bus_space_handle_t);

       kmutex_t sc_lock;
};

#define lcdkp_dr_read(sc) \
       (sc)->sc_rread((sc)->sc_iot, (sc)->sc_ioh);

void lcdkp_attach_subr(struct lcdkp_chip *);
int  lcdkp_scankey(struct lcdkp_chip *);
int  lcdkp_readkey(struct lcdkp_chip *, u_int8_t *);

#endif /* _KERNEL */

#endif /* _DEV_IC_LCDKP_SUBR_H_ */