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      1 /* $NetBSD: lcdkp_subr.h,v 1.3 2011/05/14 02:58:27 rmind Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2002 Dennis I. Chernoivanov
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #ifndef _DEV_IC_LCDKP_SUBR_H_
     31 #define _DEV_IC_LCDKP_SUBR_H_
     32 
     33 #ifdef _KERNEL
     34 
     35 /* Key code translation */
     36 struct lcdkp_xlate {
     37 	u_int8_t x_keycode;
     38 	u_int8_t x_outcode;
     39 };
     40 
     41 /* Keypad control structure */
     42 struct lcdkp_chip {
     43 	bus_space_tag_t sc_iot;
     44 	bus_space_handle_t sc_ioh;	/* keypad i/o register */
     45 
     46 #define LCDKP_HAS_BUF	0x1
     47 	u_char sc_flags;
     48 	u_int8_t sc_buf;		/* pending character */
     49 
     50 	u_int8_t sc_knum;		/* number of buttons */
     51 	struct lcdkp_xlate *sc_kpad;	/* recognized keycodes */
     52 
     53 	u_int8_t (* sc_rread)(bus_space_tag_t, bus_space_handle_t);
     54 
     55 	kmutex_t sc_lock;
     56 };
     57 
     58 #define lcdkp_dr_read(sc) \
     59 	(sc)->sc_rread((sc)->sc_iot, (sc)->sc_ioh);
     60 
     61 void lcdkp_attach_subr(struct lcdkp_chip *);
     62 int  lcdkp_scankey(struct lcdkp_chip *);
     63 int  lcdkp_readkey(struct lcdkp_chip *, u_int8_t *);
     64 
     65 #endif /* _KERNEL */
     66 
     67 #endif /* _DEV_IC_LCDKP_SUBR_H_ */
     68