/*      $NetBSD: cons.h,v 1.29 2022/10/03 19:12:29 riastradh Exp $      */

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* from: Utah $Hdr: cons.h 1.6 92/01/21$
*
*      @(#)cons.h      8.1 (Berkeley) 6/10/93
*/

#ifndef _SYS_DEV_CONS_H_
#define _SYS_DEV_CONS_H_

#include <sys/types.h>

struct consdev {
       void    (*cn_probe)     /* probe hardware and fill in consdev info */
                  (struct consdev *);
       void    (*cn_init)      /* turn on as console */
                  (struct consdev *);
       int     (*cn_getc)      /* kernel getchar interface */
                  (dev_t);
       void    (*cn_putc)      /* kernel putchar interface */
                  (dev_t, int);
       void    (*cn_pollc)     /* turn on and off polling */
                  (dev_t, int);
       void    (*cn_bell)      /* ring bell */
                  (dev_t, u_int, u_int, u_int);
       void    (*cn_halt)      /* stop device */
                  (dev_t);
       void    (*cn_flush)     /* flush output */
                  (dev_t);
       dev_t   cn_dev;         /* major/minor of device */
       int     cn_pri;         /* pecking order; the higher the better */
};

/* values for cn_pri - reflect our policy for console selection */
#define CN_DEAD         0       /* device doesn't exist */
#define CN_NULL         1       /* noop console */
#define CN_NORMAL       2       /* device exists but is nothing special */
#define CN_INTERNAL     3       /* "internal" bit-mapped display */
#define CN_REMOTE       4       /* serial interface with remote bit set */

#ifdef _KERNEL

extern  struct consdev constab[];
extern  struct consdev *cn_tab;

void    cn_set_tab(struct consdev *);

void    cninit(void);
int     cngetc(void);
int     cngetsn(char *, int);
void    cnputc(int);
void    cnpollc(int);
void    cnbell(u_int, u_int, u_int);
void    cnflush(void);
void    cnhalt(void);
void    cnrint(void);
void    nullcnprobe(struct consdev *);
void    nullcninit(struct consdev *);
void    nullcnpollc(dev_t, int);
void    nullconsattach(int);

/* console-specific types */
#define dev_type_cnprobe(n)     void n(struct consdev *)
#define dev_type_cninit(n)      void n(struct consdev *)
#define dev_type_cngetc(n)      int n(dev_t)
#define dev_type_cnputc(n)      void n(dev_t, int)
#define dev_type_cnpollc(n)     void n(dev_t, int)
#define dev_type_cnbell(n)      void n(dev_t, u_int, u_int, u_int)
#define dev_type_cnhalt(n)      void n(dev_t)
#define dev_type_cnflush(n)     void n(dev_t)

#define dev_decl(n,t)           __CONCAT(dev_type_,t)(__CONCAT(n,t))
#define dev_init(n,t)           __CONCAT(n,t)

#define cons_decl(n) \
       dev_decl(n,cnprobe); dev_decl(n,cninit); dev_decl(n,cngetc); \
       dev_decl(n,cnputc); dev_decl(n,cnpollc); dev_decl(n,cnbell); \
       dev_decl(n,cnflush); dev_decl(n,cnhalt);

#define cons_init(n) { \
       dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \
       dev_init(n,cnputc), dev_init(n,cnpollc), NULL, NULL, NULL, \
       0, 0 }

#define cons_init_bell(n) { \
       dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \
       dev_init(n,cnputc), dev_init(n,cnpollc), dev_init(n,cnbell) }

#define cons_init_halt(n) { \
       dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \
       dev_init(n,cnputc), dev_init(n,cnpollc), 0,                  \
       dev_init(n,cnhalt) }

#endif

#endif /* _SYS_DEV_CONS_H_ */

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