usr/src/sys/hpdev/grf_rb.c

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * Redistribution is only permitted until one year after the first shipment
 * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
 * binary forms are permitted provided that: (1) source distributions retain
 * this entire copyright notice and comment, and (2) distributions including
 * binaries display the following acknowledgement:  This product includes
 * software developed by the University of California, Berkeley and its
 * contributors'' in the documentation or other materials provided with the
 * distribution and in all advertising materials mentioning features or use
 * of this software.  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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * from: Utah $Hdr: grf_rb.c 1.10 89/04/11$
 *
 *      @(#)grf_rb.c    7.2 (Berkeley) 5/25/90
 */

#include "grf.h"
#if NGRF > 0

/*
 * Graphics routines for the Renaissance, HP98720 Graphics system.
 */
#include "param.h"
#include "errno.h"

#include "grfioctl.h"
#include "grfvar.h"
#include "grf_rbreg.h"

#include "machine/cpu.h"

/*
 * Initialize hardware.
 * Must point g_display at a grfinfo structure describing the hardware.
 * Returns 0 if hardware not present, non-zero ow.
 */
rb_init(gp, addr)
        struct grf_softc *gp;
        u_char *addr;
{
        register struct rboxfb *rbp;
        struct grfinfo *gi = &gp->g_display;
        int fboff;

        rbp = (struct rboxfb *) addr;
        gi->gd_regaddr = (caddr_t) UNIOV(addr);
        gi->gd_regsize = 0x20000;
        gi->gd_fbwidth = (rbp->fbwmsb << 8) | rbp->fbwlsb;
        gi->gd_fbheight = (rbp->fbhmsb << 8) | rbp->fbhlsb;
        fboff = (rbp->fbomsb << 8) | rbp->fbolsb;
        gi->gd_fbaddr = (caddr_t) (*(addr + fboff) << 16);
        gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
        gi->gd_dwidth = (rbp->dwmsb << 8) | rbp->dwlsb;
        gi->gd_dheight = (rbp->dwmsb << 8) | rbp->dwlsb;
        gi->gd_planes = 0;      /* ?? */
        gi->gd_colors = 256;
        return(1);
}

/*
 * Change the mode of the display.
 * Right now all we can do is grfon/grfoff.
 * Return a UNIX error number or 0 for success.
 */
rb_mode(gp, cmd)
        register struct grf_softc *gp;
{
        register struct rboxfb *rbp;
        int error = 0;

        rbp = (struct rboxfb *) IOV(gp->g_display.gd_regaddr);
        switch (cmd) {
        /*
         * The minimal register info here is from the Renaissance X driver.
         */
        case GM_GRFON:
        case GM_GRFOFF:
                break;
        case GM_GRFOVON:
                rbp->write_enable = 0;
                rbp->opwen = 0xF;
                rbp->drive = 0x10;
                break;
        case GM_GRFOVOFF:
                rbp->opwen = 0;
                rbp->write_enable = 0xffffffff;
                rbp->drive = 0x01;
                break;
        default:
                error = EINVAL;
                break;
        }
        return(error);
}

#endif