141 lines
4.3 KiB
C
141 lines
4.3 KiB
C
/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah Hdr: grf_tc.c 1.18 91/04/02
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* from: @(#)grf_tc.c 7.4 (Berkeley) 5/7/91
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* $Id: grf_tc.c,v 1.2 1993/08/01 19:24:16 mycroft Exp $
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*/
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#include "grf.h"
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#if NGRF > 0
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/*
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* Graphics routines for TOPCAT frame buffer
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*/
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#include "sys/param.h"
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#include "sys/errno.h"
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#include "grfioctl.h"
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#include "grfvar.h"
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#include "grf_tcreg.h"
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#include "../include/cpu.h"
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/*
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* Initialize hardware.
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* Must fill in the grfinfo structure in g_softc.
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* Returns 0 if hardware not present, non-zero ow.
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*/
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tc_init(gp, addr)
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struct grf_softc *gp;
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caddr_t addr;
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{
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register struct tcboxfb *tp = (struct tcboxfb *) addr;
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struct grfinfo *gi = &gp->g_display;
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volatile u_char *fbp;
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u_char save;
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int fboff;
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extern caddr_t sctopa(), iomap();
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if (ISIIOVA(addr))
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gi->gd_regaddr = (caddr_t) IIOP(addr);
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else
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gi->gd_regaddr = sctopa(vatosc(addr));
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gi->gd_regsize = 0x10000;
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gi->gd_fbwidth = (tp->fbwmsb << 8) | tp->fbwlsb;
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gi->gd_fbheight = (tp->fbhmsb << 8) | tp->fbhlsb;
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gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
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fboff = (tp->fbomsb << 8) | tp->fbolsb;
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gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16);
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if (gi->gd_regaddr >= (caddr_t)DIOIIBASE) {
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/*
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* For DIO II space the fbaddr just computed is the offset
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* from the select code base (regaddr) of the framebuffer.
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* Hence it is also implicitly the size of the register set.
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*/
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gi->gd_regsize = (int) gi->gd_fbaddr;
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gi->gd_fbaddr += (int) gi->gd_regaddr;
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gp->g_regkva = addr;
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gp->g_fbkva = addr + gi->gd_regsize;
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} else {
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/*
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* For DIO space we need to map the seperate framebuffer.
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*/
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gp->g_regkva = addr;
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gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize);
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}
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gi->gd_dwidth = (tp->dwmsb << 8) | tp->dwlsb;
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gi->gd_dheight = (tp->dhmsb << 8) | tp->dhlsb;
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gi->gd_planes = tp->num_planes;
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gi->gd_colors = 1 << gi->gd_planes;
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if (gi->gd_colors == 1) {
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fbp = (u_char *) gp->g_fbkva;
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tp->wen = ~0;
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tp->prr = 0x3;
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tp->fben = ~0;
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save = *fbp;
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*fbp = 0xFF;
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gi->gd_colors = *fbp + 1;
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*fbp = save;
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}
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return(1);
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}
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/*
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* Change the mode of the display.
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* Right now all we can do is grfon/grfoff.
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* Return a UNIX error number or 0 for success.
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* Function may not be needed anymore.
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*/
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/*ARGSUSED*/
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tc_mode(gp, cmd)
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struct grf_softc *gp;
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{
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int error = 0;
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switch (cmd) {
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case GM_GRFON:
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case GM_GRFOFF:
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break;
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default:
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error = EINVAL;
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break;
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}
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return(error);
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}
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#endif
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