/*      $NetBSD: ite_cl.c,v 1.11 2009/10/26 19:16:54 cegger Exp $ */

/*
 * Copyright (c) 1995 Ezra Story
 * Copyright (c) 1995 Kari Mettinen
 * Copyright (c) 1994 Markus Wild
 * Copyright (c) 1994 Lutz Vieweg
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Lutz Vieweg.
 * 4. 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.
 */

#include "opt_amigacons.h"

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ite_cl.c,v 1.11 2009/10/26 19:16:54 cegger Exp $");

#include "grfcl.h"
#if NGRFCL > 0

#include <sys/param.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/systm.h>
#include <dev/cons.h>
#include <machine/cpu.h>
#include <amiga/amiga/device.h>
#include <amiga/dev/grfioctl.h>
#include <amiga/dev/grfvar.h>
#include <amiga/dev/grf_clreg.h>
#include <amiga/dev/itevar.h>

#ifdef CL5426CONSOLE
int cl_console = 1;
#else
int cl_console = 0;
#endif

void cl_init(struct ite_softc *ip);
void cl_cursor(struct ite_softc *ip, int flag);
void cl_deinit(struct ite_softc *ip);
void cl_putc(struct ite_softc *ip, int c, int dy, int dx, int mode);
void cl_clear(struct ite_softc *ip, int sy, int sx, int h, int w);
void cl_scroll(struct ite_softc *ip, int sy, int sx, int count, int dir);


/*
 * Called to determine ite status.  Because the connection between the
 * console & ite in this driver is rather intimate, we return CN_DEAD
 * if the cl_console is not active.
 */
int
grfcl_cnprobe(void)
{
        static int done;
        int rv;

        if (cl_console && (done == 0))
                rv = CN_INTERNAL;
        else
                rv = CN_DEAD;

        done = 1;
        return(rv);
}

void
grfcl_iteinit(struct grf_softc *gp)
{
        gp->g_iteinit = cl_init;
        gp->g_itedeinit = cl_deinit;
        gp->g_iteclear = cl_clear;
        gp->g_iteputc = cl_putc;
        gp->g_itescroll = cl_scroll;
        gp->g_itecursor = cl_cursor;
}

void
cl_init(struct ite_softc *ip)
{
        struct grfcltext_mode *md;

        ip->priv = ip->grf->g_data;
        md = (struct grfcltext_mode *) ip->priv;

        ip->cols = md->cols;
        ip->rows = md->rows;
}


void
cl_cursor(struct ite_softc *ip, int flag)
{
        volatile u_char *ba = ip->grf->g_regkva;

        switch (flag) {
        case DRAW_CURSOR:
                /*WCrt(ba, CRT_ID_CURSOR_START, & ~0x20); */
        case MOVE_CURSOR:
                flag = ip->curx + ip->cury * ip->cols;
                WCrt(ba, CRT_ID_CURSOR_LOC_LOW, flag & 0xff);
                WCrt(ba, CRT_ID_CURSOR_LOC_HIGH, flag >> 8);
                ip->cursorx = ip->curx;
                ip->cursory = ip->cury;
                break;
        case ERASE_CURSOR:
                /*WCrt(ba, CRT_ID_CURSOR_START, | 0x20); */
        case START_CURSOROPT:
        case END_CURSOROPT:
        default:
                break;
        }
}


void
cl_deinit(struct ite_softc *ip)
{
        ip->flags &= ~ITE_INITED;
}


void
cl_putc(struct ite_softc *ip, int c, int dy, int dx, int mode)
{
        volatile unsigned char *ba = ip->grf->g_regkva;
        volatile unsigned char *fb = ip->grf->g_fbkva;
        unsigned char attr;
        volatile unsigned char *cp;

        if (ip->flags & ITE_INGRF)
                return;

        attr =(unsigned char) ((mode & ATTR_INV) ? (0x70) : (0x07));
        if (mode & ATTR_UL)     attr  = 0x01;   /* ???????? */
        if (mode & ATTR_BOLD)   attr |= 0x08;
        if (mode & ATTR_BLINK)  attr |= 0x80;

        cp = fb + ((dy * ip->cols) + dx);
        SetTextPlane(ba,0x00);
        *cp = (unsigned char) c;
        SetTextPlane(ba,0x01);
        *cp = (unsigned char) attr;
}

void
cl_clear(struct ite_softc *ip, int sy, int sx, int h, int w)
{
        /* cl_clear and cl_scroll both rely on ite passing arguments
         * which describe continuous regions.  For a VT200 terminal,
         * this is safe behavior.
         */
        unsigned char *src, *dst;
        volatile unsigned char *ba = ip->grf->g_regkva;
        int len;

        if (ip->flags & ITE_INGRF)
                return;

        dst = (unsigned char*)__UNVOLATILE(ip->grf->g_fbkva) +
                (sy * ip->cols) + sx;
        src = dst + (ip->rows*ip->cols);
        len = w*h;

        SetTextPlane(ba, 0x00);
        memcpy(dst, src, len);
        SetTextPlane(ba, 0x01);
        memcpy(dst, src, len);
}

void
cl_scroll(struct ite_softc *ip, int sy, int sx, int count, int dir)
{
        unsigned char *fb;
        volatile unsigned char *ba = ip->grf->g_regkva;

        if (ip->flags & ITE_INGRF)
                return;

        fb = (unsigned char*)__UNVOLATILE(ip->grf->g_fbkva) + sy * ip->cols;
        SetTextPlane(ba, 0x00);

        switch (dir) {
        case SCROLL_UP:
                memcpy(fb - (count * ip->cols), fb,
                    (ip->bottom_margin + 1 - sy) * ip->cols);
                break;
        case SCROLL_DOWN:
                memcpy(fb + (count * ip->cols), fb,
                    (ip->bottom_margin + 1 - (sy + count)) * ip->cols);
                break;
        case SCROLL_RIGHT:
                memcpy(fb+sx+count, fb+sx, ip->cols - (sx + count));
                break;
        case SCROLL_LEFT:
                memcpy(fb+sx-count, fb+sx, ip->cols - sx);
                break;
        }

        SetTextPlane(ba, 0x01);

        switch (dir) {
        case SCROLL_UP:
                memcpy(fb - (count * ip->cols), fb,
                    (ip->bottom_margin + 1 - sy) * ip->cols);
                break;
        case SCROLL_DOWN:
                memcpy(fb + (count * ip->cols), fb,
                    (ip->bottom_margin + 1 - (sy + count)) * ip->cols);
                break;
        case SCROLL_RIGHT:
                memcpy(fb+sx+count, fb+sx, ip->cols - (sx + count));
                break;
        case SCROLL_LEFT:
                memcpy(fb+sx-count, fb+sx, ip->cols - sx);
                break;
        }
}
#endif /* NGRFCL */