/*      $NetBSD: ite_cv.c,v 1.8 2007/03/05 20:29:07 he Exp $ */

/*
 * Copyright (c) 1995 Michael Teske
 * 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 Christian E. Hopps,
 *      Ezra Story, Kari Mettinen, Markus Wild, Lutz Vieweg
 *      and Michael Teske.
 * 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.
 */

/*
 * This code is based on ite_cl.c and ite_rh.c by
 * Ezra Story, Kari Mettinen, Markus Wild, Lutz Vieweg.
 */

#include "opt_amigacons.h"

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ite_cv.c,v 1.8 2007/03/05 20:29:07 he Exp $");

#include "grfcv.h"
#if NGRFCV > 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 <sys/queue.h>
#include <sys/termios.h>
#include <sys/malloc.h>
#include <dev/cons.h>
#include <machine/cpu.h>
#include <amiga/dev/itevar.h>
#include <amiga/dev/iteioctl.h>
#include <amiga/amiga/device.h>
#include <amiga/dev/grfioctl.h>
#include <amiga/dev/grfvar.h>
#include <amiga/dev/grf_cvreg.h>

void cv_ite_init(struct ite_softc *);
void cv_ite_deinit(struct ite_softc *);
static void cv_cursor(struct ite_softc *, int);
static void cv_putc(struct ite_softc *, int, int, int, int);
static void cv_clear(struct ite_softc *, int, int, int, int);
static void cv_scroll(struct ite_softc *, int, int, int, int);

/*
 * called from grf_cv to return console priority
 */
int
grfcv_cnprobe(void)
{
        static int done;
        int rv;

        if (done == 0)
#ifdef CV64CONSOLE
                rv = CN_INTERNAL;
#else
                rv = CN_DEAD;
#endif
        else
#ifdef CV64CONSOLE
                rv = CN_NORMAL;
#else
                rv = CN_DEAD;
#endif
        done = 1;
        return(rv);
}


/*
 * called from grf_cv to init ite portion of
 * grf_softc struct
 */
void
grfcv_iteinit(struct grf_softc *gp)
{
        gp->g_itecursor = cv_cursor;
        gp->g_iteputc = cv_putc;
        gp->g_iteclear = cv_clear;
        gp->g_itescroll = cv_scroll;
        gp->g_iteinit = cv_ite_init;
        gp->g_itedeinit = cv_ite_deinit;
}


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


static unsigned short cv_rowc[MAXCOLS*(MAXROWS+1)];

/*
 * Console buffer to avoid the slow reading from gfx mem.
 */

static unsigned short *console_buffer;

void
cv_ite_init(register struct ite_softc *ip)
{
        struct grfcvtext_mode *md;
        int i;
        static char first = 1;
        volatile unsigned short *fb = (volatile unsigned short *)ip->grf->g_fbkva;
        unsigned short *buffer;


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

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

        /* alloc buffers */

#if 0  /* XXX malloc seems not to work in early init :( */
        if (cv_rowc)
                free(cv_rowc, M_DEVBUF);

        /* alloc all in one */
        cv_rowc = malloc(sizeof(short) * (ip->rows + 1) * (ip->cols + 2),
                M_DEVBUF, M_WAITOK);
        if (!cv_rowc)
                panic("No buffers for ite_cv!");
#endif

        console_buffer = cv_rowc + ip->rows + 1;


        for (i = 0; i < ip->rows; i++)
                cv_rowc[i] = i * ip->cols;

        if (first) {
                for (i = 0; i < ip->rows * ip->cols; i++)
                        console_buffer[i] = 0x2007;
                first = 0;
        } else { /* restore console */
                buffer = console_buffer;
                for (i = 0; i < ip->rows * ip->cols; i++) {
                        *fb++ = *buffer++;
                        *fb++;
                }
        }
}


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

        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 + ((cv_rowc[dy] + dx) << 2); /* *4 */
        *cp++ = (unsigned char) c;
        *cp = (unsigned char) attr;

        cp = (unsigned char *) &console_buffer[cv_rowc[dy]+dx];
        *cp++ = (unsigned char) c;
        *cp = (unsigned char) attr;
}


void
cv_clear(struct ite_softc *ip, int sy, int sx, int h, int w)
{
        /* cv_clear and cv_scroll both rely on ite passing arguments
         * which describe continuous regions.  For a VT200 terminal,
         * this is safe behavior.
         */
        volatile unsigned short  *dst;
        int len;

        dst = (volatile unsigned short *)
                ((volatile char*)ip->grf->g_fbkva +
                 (((sy * ip->cols) + sx) << 2));

        for (len = w * h; len > 0 ; len--) {
                *dst = 0x2007;
                dst +=2;
        }

        dst = &console_buffer[(sy * ip->cols) + sx];
        for (len = w * h; len > 0 ; len--) {
                *dst++ = 0x2007;
        }
}

void
cv_scroll(struct ite_softc *ip, int sy, int sx, int count, int dir)
{
        volatile unsigned short *src, *dst, *dst2;
        int i;
        int len;

        src = (volatile unsigned short *)
                ((volatile char*)ip->grf->g_fbkva + (cv_rowc[sy] << 2));

        switch (dir) {
            case SCROLL_UP:
                dst = src - ((cv_rowc[count])<<1);

                len = cv_rowc[(ip->bottom_margin + 1 - sy)];
                src = &console_buffer[cv_rowc[sy]];

                if (count > sy) { /* boundary checks */
                        dst2 = console_buffer;
                        dst = (volatile unsigned short *)(ip->grf->g_fbkva);
                        len -= cv_rowc[(count - sy)];
                        src += cv_rowc[(count - sy)];
                } else
                        dst2 = &console_buffer[cv_rowc[(sy-count)]];

                bcopy (__UNVOLATILE(src), __UNVOLATILE(dst2), len << 1);

                for (i = 0; i < len; i++) {
                        *dst++ = *dst2++;
                        dst++;
                }
                break;
            case SCROLL_DOWN:
                dst = src + ((cv_rowc[count]) << 1);

                len = cv_rowc[(ip->bottom_margin + 1 - (sy + count))];
                src = &console_buffer[cv_rowc[sy]];
                dst2 = &console_buffer[cv_rowc[(sy + count)]];

                if (len < 0)
                        return;  /* do some boundary check */

                bcopy (__UNVOLATILE(src), __UNVOLATILE(dst2), len << 1);

                for (i = 0; i < len; i++) {
                        *dst++ = *dst2++;
                        dst++;
                }
                break;
            case SCROLL_RIGHT:
                dst = src + ((sx+count)<<1);
                src = &console_buffer[cv_rowc[sy] + sx];
                len = ip->cols - (sx + count);
                dst2 = &console_buffer[cv_rowc[sy] + sx + count];
                bcopy (__UNVOLATILE(src), __UNVOLATILE(dst2), len << 1);

                for (i = 0; i < len; i++) {
                        *dst++ = *dst2++;
                        dst++;
                }
                break;
            case SCROLL_LEFT:
                dst = src + ((sx - count)<<1);
                src = &console_buffer[cv_rowc[sy] + sx];
                len = ip->cols - sx;
                dst2 = &console_buffer[cv_rowc[sy] + sx - count];
                bcopy (__UNVOLATILE(src), __UNVOLATILE(dst2), len << 1);

                for (i = 0; i < len; i++) {
                        *dst++ = *dst2++;
                        dst++;
                }
        }
}

#endif /* NGRFCV */