/* $NetBSD: pcdisplayvar.h,v 1.20 2014/11/12 03:12:35 christos Exp $ */

/*
* Copyright (c) 1998
*      Matthias Drochner.  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.
*
* 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.
*
*/

#ifdef _KERNEL_OPT
#include "opt_pcdisplay.h"
#endif

struct pcdisplayscreen {
       struct pcdisplay_handle *hdl;

       const struct wsscreen_descr *type;

       int active;             /* currently displayed */
       u_int16_t *mem;         /* backing store for contents */

       int cursoron;           /* cursor displayed? */
#ifdef PCDISPLAY_SOFTCURSOR
       int cursortmp;          /* glyph & attribute behind software cursor */
#endif
       int cursorcol, cursorrow;       /* current cursor position */

       int dispoffset;         /* offset of displayed area in video mem */
       int visibleoffset;
};

struct pcdisplay_handle {
       bus_space_tag_t ph_iot, ph_memt;
       bus_space_handle_t ph_ioh_6845, ph_memh;
};

static __inline u_int8_t _pcdisplay_6845_read(struct pcdisplay_handle *, int);
static __inline void _pcdisplay_6845_write(struct pcdisplay_handle *, int,
                                        u_int8_t);

static __inline u_int8_t _pcdisplay_6845_read(struct pcdisplay_handle *ph, int reg)
{
       bus_space_write_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_INDEX, reg);
       return (bus_space_read_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_DATA));
}

static __inline void _pcdisplay_6845_write(struct pcdisplay_handle *ph,
                                       int reg, uint8_t val)
{
       bus_space_write_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_INDEX, reg);
       bus_space_write_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_DATA, val);
}

#define pcdisplay_6845_read(ph, reg) \
       _pcdisplay_6845_read(ph, offsetof(struct reg_mc6845, reg))
#define pcdisplay_6845_write(ph, reg, val) \
       _pcdisplay_6845_write(ph, offsetof(struct reg_mc6845, reg), val)

void    pcdisplay_cursor_init(struct pcdisplayscreen *, int);
void    pcdisplay_cursor(void *, int, int, int);
#if 0
unsigned int pcdisplay_mapchar_simple(void *, int);
#endif
int     pcdisplay_mapchar(void *, int, unsigned int *);
void    pcdisplay_putchar(void *, int, int, u_int, long);
void    pcdisplay_copycols(void *, int, int, int,int);
void    pcdisplay_erasecols(void *, int, int, int, long);
void    pcdisplay_copyrows(void *, int, int, int);
void    pcdisplay_eraserows(void *, int, int, long);
void    pcdisplay_replaceattr(void *, long, long);
struct wsdisplay_char;
int     pcdisplay_getwschar(struct pcdisplayscreen *, struct wsdisplay_char *);
int     pcdisplay_putwschar(struct pcdisplayscreen *, struct wsdisplay_char *);