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- /*
- * 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 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: Utah $Hdr: grf_tc.c 1.18 91/04/02$
- *
- * @(#)grf_tc.c 7.4 (Berkeley) 5/7/91
- */
-
- #include "grf.h"
- #if NGRF > 0
-
- /*
- * Graphics routines for TOPCAT frame buffer
- */
- #include "sys/param.h"
- #include "sys/errno.h"
-
- #include "grfioctl.h"
- #include "grfvar.h"
- #include "grf_tcreg.h"
-
- #include "../include/cpu.h"
-
- /*
- * Initialize hardware.
- * Must fill in the grfinfo structure in g_softc.
- * Returns 0 if hardware not present, non-zero ow.
- */
- tc_init(gp, addr)
- struct grf_softc *gp;
- caddr_t addr;
- {
- register struct tcboxfb *tp = (struct tcboxfb *) addr;
- struct grfinfo *gi = &gp->g_display;
- volatile u_char *fbp;
- u_char save;
- int fboff;
- extern caddr_t sctopa(), iomap();
-
- if (ISIIOVA(addr))
- gi->gd_regaddr = (caddr_t) IIOP(addr);
- else
- gi->gd_regaddr = sctopa(vatosc(addr));
- gi->gd_regsize = 0x10000;
- gi->gd_fbwidth = (tp->fbwmsb << 8) | tp->fbwlsb;
- gi->gd_fbheight = (tp->fbhmsb << 8) | tp->fbhlsb;
- gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
- fboff = (tp->fbomsb << 8) | tp->fbolsb;
- gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16);
- if (gi->gd_regaddr >= (caddr_t)DIOIIBASE) {
- /*
- * For DIO II space the fbaddr just computed is the offset
- * from the select code base (regaddr) of the framebuffer.
- * Hence it is also implicitly the size of the register set.
- */
- gi->gd_regsize = (int) gi->gd_fbaddr;
- gi->gd_fbaddr += (int) gi->gd_regaddr;
- gp->g_regkva = addr;
- gp->g_fbkva = addr + gi->gd_regsize;
- } else {
- /*
- * For DIO space we need to map the seperate framebuffer.
- */
- gp->g_regkva = addr;
- gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize);
- }
- gi->gd_dwidth = (tp->dwmsb << 8) | tp->dwlsb;
- gi->gd_dheight = (tp->dhmsb << 8) | tp->dhlsb;
- gi->gd_planes = tp->num_planes;
- gi->gd_colors = 1 << gi->gd_planes;
- if (gi->gd_colors == 1) {
- fbp = (u_char *) gp->g_fbkva;
- tp->wen = ~0;
- tp->prr = 0x3;
- tp->fben = ~0;
- save = *fbp;
- *fbp = 0xFF;
- gi->gd_colors = *fbp + 1;
- *fbp = save;
- }
- 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.
- * Function may not be needed anymore.
- */
- /*ARGSUSED*/
- tc_mode(gp, cmd)
- struct grf_softc *gp;
- {
- int error = 0;
-
- switch (cmd) {
- case GM_GRFON:
- case GM_GRFOFF:
- break;
- default:
- error = EINVAL;
- break;
- }
- return(error);
- }
- #endif
-