/*	$OpenBSD: bmd.c,v 1.6 2023/02/15 12:43:32 aoyama Exp $	*/
/*	$NetBSD: bmd.c,v 1.2 2013/01/20 13:35:43 tsutsui Exp $	*/

/*
 * Copyright (c) 1992 OMRON Corporation.
 *
 * This code is derived from software contributed to Berkeley by
 * OMRON Corporation.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 *
 *	@(#)bmd.c	8.2 (Berkeley) 8/15/93
 */
/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * OMRON Corporation.
 *
 * 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.
 *
 *	@(#)bmd.c	8.2 (Berkeley) 8/15/93
 */
/*

 * bmd.c --- Bitmap-Display raw-level driver routines
 *
 *	by A.Fujita, SEP-09-1992
 */


#include <sys/param.h>
#include <machine/board.h>
#include <luna88k/stand/boot/samachdep.h>

/*
 *  RFCNT register
 */

union bmd_rfcnt {
	struct {
		short	rfc_hcnt;
		short	rfc_vcnt;
	} p;
	uint32_t u;
};

#define isprint(c)      ((c) >= 0x20 && (c) < 0x7f)

/*
 *  Width & Height
 */

#define	PB_WIDTH	2048			/* Plane Width   (Bit) */
#define	PB_HEIGHT	1024			/* Plane Height  (Bit) */
#define PS_WIDTH	128			/* Plane Width   (Short) */
#define P_WIDTH		256			/* Plane Width   (Byte) */

#define SB_WIDTH	1280			/* Screen Width  (Bit) */
#define	SB_HEIGHT	1024			/* Screen Height (Bit) */
#define SS_WIDTH	80			/* Screen Width  (Short) */
#define S_WIDTH		160			/* Screen Width  (Byte) */

#define FB_WIDTH	12			/* Font Width    (Bit) */
#define FB_HEIGHT	20			/* Font Height   (Bit) */


#define NEXT_LINE(addr)			((addr) + (PS_WIDTH * FB_HEIGHT))
#define SKIP_NEXT_LINE(addr)		(addr) += (PS_WIDTH - SS_WIDTH)


void	bmd_draw_char(char *, char *, int, int, int);
void	bmd_reverse_char(char *, char *, int, int);
void	bmd_erase_char(char *, char *, int, int);
void	bmd_erase_screen(volatile u_short *);
void	bmd_scroll_screen(volatile u_short *, volatile u_short *,
	    int, int, int, int);


struct bmd_linec {
	struct bmd_linec *bl_next;
	struct bmd_linec *bl_prev;
	int	bl_col;
	int	bl_end;
	u_char	bl_line[128];
};

struct bmd_softc {
	int	bc_stat;
	char   *bc_raddr;
	char   *bc_waddr;
	int	bc_xmin;
	int	bc_xmax;
	int	bc_ymin;
	int	bc_ymax;
	int	bc_col;
	int	bc_row;
	struct bmd_linec *bc_bl;
	char	bc_escseq[8];
	char   *bc_esc;
	void  (*bc_escape)(int);
};

#define	STAT_NORMAL	0x0000
#define	STAT_ESCAPE	0x0001
#define	STAT_INSERT	0x0100

struct	bmd_softc bmd_softc;
struct	bmd_linec bmd_linec[52];

void	bmd_escape(int);
void	bmd_escape_0(int);
void	bmd_escape_1(int);


/*
 * Escape-Sequence
 */

void
bmd_escape(int c)
{
	struct bmd_softc *bp = &bmd_softc;

	switch (c) {

	case '[':
		bp->bc_escape = bmd_escape_0;
		break;

	default:
		bp->bc_stat &= ~STAT_ESCAPE;
		bp->bc_esc = &bp->bc_escseq[0];
		bp->bc_escape = bmd_escape;
		break;
	}
}

void
bmd_escape_0(int c)
{
	struct bmd_softc *bp = &bmd_softc;
	struct bmd_linec *bq = bp->bc_bl;

	switch (c) {

	case 'A':
		if (bp->bc_row > bp->bc_ymin) {
			bp->bc_row--;
		}
		break;

	case 'C':
		if (bq->bl_col < bp->bc_xmax - 1) {
			bq->bl_col++;
		}
		break;

	case 'K':
		if (bq->bl_col < bp->bc_xmax) {
			int col;
			for (col = bq->bl_col; col < bp->bc_xmax; col++)
				bmd_erase_char(bp->bc_raddr,
					       bp->bc_waddr,
					       col, bp->bc_row);
		}
		bq->bl_end = bq->bl_col;
		break;

	case 'H':
		bq->bl_col = bq->bl_end = bp->bc_xmin;
		bp->bc_row = bp->bc_ymin;
		break;

	default:
/*
		*bp->bc_esc++ = c;
		bp->bc_escape = bmd_escape_1;
		return;
 */
		break;
	}

	bp->bc_stat &= ~STAT_ESCAPE;
	bp->bc_esc = &bp->bc_escseq[0];
	bp->bc_escape = bmd_escape;
}

void
bmd_escape_1(int c)
{
	struct bmd_softc *bp = &bmd_softc;
	struct bmd_linec *bq = bp->bc_bl;
	int col = 0, row = 0;
	char *p;

	switch (c) {

	case 'J':
		bp->bc_stat &= ~STAT_ESCAPE;
		bp->bc_esc = &bp->bc_escseq[0];
		bp->bc_escape = bmd_escape;
		break;

	case 'H':
		for (p = &bp->bc_escseq[0]; *p != ';'; p++)
			row = (row * 10) + (*p - 0x30);
		p++;
		for (p = &bp->bc_escseq[0]; p != bp->bc_esc; p++)
			col = (col * 10) + (*p - 0x30);

		bq->bl_col = col + bp->bc_xmin;
		bp->bc_row = row + bp->bc_ymin;

		bp->bc_stat &= ~STAT_ESCAPE;
		bp->bc_esc = &bp->bc_escseq[0];
		bp->bc_escape = bmd_escape;
		break;

	default:
		*bp->bc_esc++ = c;
		break;
	}
}


/*
 * Entry Routine
 */

void
bmdinit(void)
{
	volatile uint32_t *bmd_rfcnt = (volatile uint32_t *)BMAP_RFCNT;
	volatile long *bmd_bmsel = (volatile long *)BMAP_BMSEL;
	struct bmd_softc *bp = &bmd_softc;
	struct bmd_linec *bq;
	int i;
	union bmd_rfcnt rfcnt;

	/*
	 *  adjust plane position
	 */

	bp->bc_raddr = (char *)(BMAP_BMAP0 + 8);	/* plane-0 hardware address */
	bp->bc_waddr = (char *)(BMAP_BMP + 8);		/* common bitmap hardware address */
	rfcnt.p.rfc_hcnt = 7;				/* shift left   16 dot */
	rfcnt.p.rfc_vcnt = -27;				/* shift down    1 dot */
	*bmd_rfcnt = rfcnt.u;

	bp->bc_stat  = STAT_NORMAL;

	bp->bc_xmin  = 12;
	bp->bc_xmax  = 92;
	bp->bc_ymin  = 2;
	bp->bc_ymax  = 48;

	bp->bc_row = bp->bc_ymin;

	for (i = bp->bc_ymin; i < bp->bc_ymax; i++) {
		bmd_linec[i].bl_next = &bmd_linec[i+1];
		bmd_linec[i].bl_prev = &bmd_linec[i-1];
	}
	bmd_linec[bp->bc_ymax-1].bl_next = &bmd_linec[bp->bc_ymin];
	bmd_linec[bp->bc_ymin].bl_prev = &bmd_linec[bp->bc_ymax-1];

	bq = bp->bc_bl = &bmd_linec[bp->bc_ymin];
	bq->bl_col = bq->bl_end = bp->bc_xmin;

	bp->bc_col = bp->bc_xmin;

	bp->bc_esc = &bp->bc_escseq[0];
	bp->bc_escape = bmd_escape;

	*bmd_bmsel = 0xff;				/* all planes */
	bmd_erase_screen((u_short *) bp->bc_waddr);	/* clear screen */
	*bmd_bmsel = 0x01;				/* 1 plane */

							/* turn on  cursole */
	bmd_reverse_char(bp->bc_raddr,
			 bp->bc_waddr,
			 bq->bl_col, bp->bc_row);
}

void
bmdadjust(short hcnt, short vcnt)
{
	volatile uint32_t *bmd_rfcnt = (volatile uint32_t *)BMAP_RFCNT;
	union bmd_rfcnt rfcnt;

	printf("bmdadjust: hcnt = %d, vcnt = %d\n", hcnt, vcnt);

	rfcnt.p.rfc_hcnt = hcnt;		/* shift left   16 dot */
	rfcnt.p.rfc_vcnt = vcnt;		/* shift down    1 dot */

	*bmd_rfcnt = rfcnt.u;
}

int
bmdputc(int c)
{
	struct bmd_softc *bp = &bmd_softc;
	struct bmd_linec *bq = bp->bc_bl;
	int i;

	c &= 0x7F;
							/* turn off cursole */
	bmd_reverse_char(bp->bc_raddr,
			 bp->bc_waddr,
			 bq->bl_col, bp->bc_row);
							/* do escape-sequence */
	if (bp->bc_stat & STAT_ESCAPE) {
		*bp->bc_esc++ = c;
		(*bp->bc_escape)(c);
		goto done;
	}

	if (isprint(c)) {
		bmd_draw_char(bp->bc_raddr, bp->bc_waddr,
			      bq->bl_col, bp->bc_row, c);
		bq->bl_col++;
		bq->bl_end++;
		if (bq->bl_col >= bp->bc_xmax) {
			bq->bl_col = bq->bl_end = bp->bc_xmin;
			bp->bc_row++;
			if (bp->bc_row >= bp->bc_ymax) {
				bmd_scroll_screen((u_short *) bp->bc_raddr,
						  (u_short *) bp->bc_waddr,
						  bp->bc_xmin, bp->bc_xmax,
						  bp->bc_ymin, bp->bc_ymax);

				bp->bc_row = bp->bc_ymax - 1;
			}
		}
	} else {
		switch (c) {
		case 0x08:				/* BS */
			if (bq->bl_col > bp->bc_xmin) {
				bq->bl_col--;
			}
			break;

		case 0x09:				/* HT */
		case 0x0B:				/* VT */
			i = ((bq->bl_col / 8) + 1) * 8;
			if (i < bp->bc_xmax) {
				bq->bl_col = bq->bl_end = i;
			}
			break;

		case 0x0A:				/* NL */
			bp->bc_row++;
			if (bp->bc_row >= bp->bc_ymax) {
				bmd_scroll_screen((u_short *) bp->bc_raddr,
						  (u_short *) bp->bc_waddr,
						  bp->bc_xmin, bp->bc_xmax,
						  bp->bc_ymin, bp->bc_ymax);

				bp->bc_row = bp->bc_ymax - 1;
			}
			break;

		case 0x0D:				/* CR */
			bq->bl_col = bp->bc_xmin;
			break;

		case 0x1b:				/* ESC */
			bp->bc_stat |= STAT_ESCAPE;
			*bp->bc_esc++ = 0x1b;
			break;

		case 0x7F:				/* DEL */
			if (bq->bl_col > bp->bc_xmin) {
				bq->bl_col--;
				bmd_erase_char(bp->bc_raddr,
					       bp->bc_waddr,
					       bq->bl_col, bp->bc_row);
			}
			break;

		default:
			break;
		}
	}

 done:
							/* turn on  cursole */
	bmd_reverse_char(bp->bc_raddr,
			 bp->bc_waddr,
			 bq->bl_col, bp->bc_row);

	return(c);
}

void
bmdclear(void)
{
	struct bmd_softc *bp = &bmd_softc;
	struct bmd_linec *bq = bp->bc_bl;

	bmd_erase_screen((u_short *) bp->bc_waddr);	/* clear screen */

	bq->bl_col = bq->bl_end = bp->bc_xmin;
	bp->bc_row = bp->bc_ymin;

	bmd_reverse_char(bp->bc_raddr,
			 bp->bc_waddr,
			 bq->bl_col, bp->bc_row);	/* turn on  cursole */
}


/*
 *  character operation routines
 */

void
bmd_draw_char(char *raddr, char *waddr, int col, int row, int c)
{
	volatile u_short *p, *q;
	const u_short *fp;
	int i;

	fp = &bmdfont[c][0];

	switch (col % 4) {

	case 0:
		p = (u_short *) ( raddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ));
		q = (u_short *) ( waddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ));
		for (i = 0; i < FB_HEIGHT; i++) {
			*q = (*p & 0x000F) | (*fp & 0xFFF0);
			p += 128;
			q += 128;
			fp++;
		}
		break;

	case 1:
		p = (u_short *) ( raddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ));
		q = (u_short *) ( waddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ));
		for (i = 0; i < FB_HEIGHT; i++) {
			q[0] = (p[0] & 0xFFF0) | ((*fp & 0xF000) >> 12);
			q[1] = (p[1] & 0x00FF) | ((*fp & 0x0FF0) << 4);
			p += 128;
			q += 128;
			fp++;
		}
		break;

	case 2:
		p = (u_short *) ( raddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ) + 2 );
		q = (u_short *) ( waddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ) + 2 );
		for (i = 0; i < FB_HEIGHT; i++) {
			q[0] = (p[0] & 0xFF00) | ((*fp & 0xFF00) >> 8);
			q[1] = (p[1] & 0x0FFF) | ((*fp & 0x00F0) << 8);
			p += 128;
			q += 128;
			fp++;
		}
		break;

	case 3:
		p = (u_short *) ( raddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ) + 4 );
		q = (u_short *) ( waddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ) + 4 );
		for (i = 0; i < FB_HEIGHT; i++) {
			*q = (*p & 0xF000) | ((*fp & 0xFFF0) >> 4);
			p += 128;
			q += 128;
			fp++;
		}
		break;

	default:
		break;
	}
}

void
bmd_reverse_char(char *raddr, char *waddr, int col, int row)
{
	volatile u_short *p, *q;
	int i;

	switch (col%4) {

	case 0:
		p = (u_short *) ( raddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ));
		q = (u_short *) ( waddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ));
		for (i = 0; i < FB_HEIGHT; i++) {
			*q = (*p & 0x000F) | (~(*p) & 0xFFF0);
			p += 128;
			q += 128;
		}
		break;

	case 1:
		p = (u_short *) ( raddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ));
		q = (u_short *) ( waddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ));
		for (i = 0; i < FB_HEIGHT; i++) {
			q[0] = (p[0] & 0xFFF0) | (~p[0] & 0x000F);
			q[1] = (p[1] & 0x00FF) | (~p[1] & 0xFF00);
			p += 128;
			q += 128;
		}
		break;

	case 2:
		p = (u_short *) ( raddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ) + 2 );
		q = (u_short *) ( waddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ) + 2 );
		for (i = 0; i < FB_HEIGHT; i++) {
			q[0] = (p[0] & 0xFF00) | (~p[0] & 0x00FF);
			q[1] = (p[1] & 0x0FFF) | (~p[1] & 0xF000);
			p += 128;
			q += 128;
		}
		break;

	case 3:
		p = (u_short *) ( raddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ) + 4 );
		q = (u_short *) ( waddr + (( row * FB_HEIGHT ) << 8 ) + (( col / 4 ) * 6 ) + 4 );
		for (i = 0; i < FB_HEIGHT; i++) {
			*q = (*p & 0xF000) | (~(*p) & 0x0FFF);
			p += 128;
			q += 128;
		}
		break;

	default:
		break;
	}
}

void
bmd_erase_char(char *raddr, char *waddr, int col, int row)
{
	bmd_draw_char(raddr, waddr, col, row, 0);

	return;
}


/*
 * screen operation routines
 */

void
bmd_erase_screen(volatile u_short *p)
{
	int i, j;

	for (i = 0; i < SB_HEIGHT; i++) {
		for (j = 0; j < SS_WIDTH; j++)
			*p++ = 0;
		SKIP_NEXT_LINE(p);
	}

	return;
}

void
bmd_scroll_screen(volatile u_short *p, volatile u_short *q,
    int xmin, int xmax, int ymin, int ymax)
{
	int i, j;

	p += ((PS_WIDTH * FB_HEIGHT) * (ymin + 1));
	q += ((PS_WIDTH * FB_HEIGHT) *  ymin);

	for (i = 0; i < ((ymax - ymin -1) * FB_HEIGHT); i++) {
		for (j = 0; j < SS_WIDTH; j++) {
			*q++ = *p++;
		}
		p += (PS_WIDTH - SS_WIDTH);
		q += (PS_WIDTH - SS_WIDTH);
	}

	for (i = 0; i < FB_HEIGHT; i++) {
		for (j = 0; j < SS_WIDTH; j++) {
			*q++ = 0;
		}
		q += (PS_WIDTH - SS_WIDTH);
	}

}