usr/src/sys/luna68k/dev/fb.c

/*-
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1992 OMRON Corporation.
 * Copyright (c) 1993, 19901992
 *      The Regents of the University of California.  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 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.
 *
 * from: hp/dev/grf.c           7.13 (Berkeley) 7/12/92
 *
 *      @(#)fb.c        8.1 (Berkeley) 6/10/93
 */

/*
 * fb.c -- frame-buffer device driver
 *      by A.Fujita, Dec-16-1992
 */

#include <sys/param.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <luna68k/dev/fbio.h>

extern  int hz;

int     fb_erase_screen();

volatile struct fb_rfc *rfcPtr = (struct fb_rfc *) 0xB1000000;
static   struct fb_rfc  rfcVal;

int
fbopen(dev, flags, mode, p)
        dev_t dev;
        int flags, mode;
        struct proc *p;
{
        fb_erase_screen();

        return(0);
}

int
fbclose(dev, flags, mode, p)
        dev_t dev;
        int flags, mode;
        struct proc *p;
{
        fb_adjust(7, -27);

        timeout(fb_erase_screen, (caddr_t)0, hz);

        return(0);
}

int
fbioctl(dev, cmd, data, flags, p)
        dev_t dev;
        int cmd;
        caddr_t data;
        int flags;
        struct proc *p;
{
        struct fb_rfc *rfcp;
        int error;

        error = 0;
        switch (cmd) {

        case FBIOSETRFCT:
                *rfcPtr = rfcVal = *((struct fb_rfc *) data);
                break;

        case FBIOGETRFCT:
                *(struct fb_rfc *)data = rfcVal;
                break;

        default:
                error = EINVAL;
                break;

        }
        return(error);
}

fb_adjust(hcnt, vcnt)
        int hcnt, vcnt;
{
        rfcVal.rfc_hcnt = hcnt;                 /* shift left   16 dot */
        rfcVal.rfc_vcnt = vcnt;                 /* shift down    1 dot */

        *rfcPtr = rfcVal;
}

#define PL_WIDTH        64                              /* Plane Width  (long) */

#define SB_HIGHT        1024                            /* Screen Hight  (Bit) */
#define SL_WIDTH        40                              /* Screen Width (Long) */

#define SKIP_NEXT_LINE(addr)                    ( addr += (PL_WIDTH - SL_WIDTH) )

fb_erase_screen()
{
        volatile register u_long *lp = (u_long *) 0xB1080008;

        register int i, j;

        for (i = 0; i < SB_HIGHT; i++) {
                for (j = 0; j < SL_WIDTH; j++)
                        *lp++ = 0;
                SKIP_NEXT_LINE(lp);
        }

        return;
}

int
fbselect(dev, rw)
        dev_t dev;
        int rw;
{
        return(0);
}

int
fbmap(dev, off, prot)
        dev_t dev;
        int off, prot;
{
        return(((u_int) 0xB10C0000 + off) >> PGSHIFT);
}