312 lines
7.5 KiB
C
312 lines
7.5 KiB
C
/* $NetBSD: bt478.c,v 1.13 2000/01/08 01:02:35 simonb Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. 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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* Ralph Campbell and Rick Macklem.
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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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* @(#)bt478.c 8.1 (Berkeley) 6/10/93
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*/
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/*
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* devGraphics.c --
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*
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* This file contains machine-dependent routines for the graphics device.
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*
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* Copyright (C) 1989 Digital Equipment Corporation.
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies.
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* Digital Equipment Corporation makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* from: Header: /sprite/src/kernel/dev/ds3100.md/RCS/devGraphics.c,
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* v 9.2 90/02/13 22:16:24 shirriff Exp SPRITE (DECWRL)";
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/bus.h> /* wbflush() */
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#include <mips/cpuregs.h>
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#include <machine/fbio.h>
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#include <machine/fbvar.h>
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#include <pmax/dev/bt478.h> /* chipset definitions */
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#include <pmax/dev/bt478var.h>
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#include <pmax/pmax/kn01.h>
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/*
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* Forward references.
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*/
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/* XXX qvss ioctl interface uses this */
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void bt478CursorColor __P((struct fbinfo *fi, unsigned int color[]));
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static u_char bg_RGB[3]; /* background color for the cursor */
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static u_char fg_RGB[3]; /* foreground color for the cursor */
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/* Initialize the VDAC. */
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int
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bt478init(fi)
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struct fbinfo *fi;
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{
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VDACRegs *vdac = (VDACRegs *)(fi -> fi_vdac);
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/*
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*
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* Initialize the VDAC
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*/
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vdac->overWA = 0x04; wbflush();
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vdac->over = 0x00; wbflush();
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vdac->over = 0x00; wbflush();
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vdac->over = 0x00; wbflush();
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vdac->overWA = 0x08; wbflush();
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vdac->over = 0x00; wbflush();
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vdac->over = 0x00; wbflush();
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vdac->over = 0x7f; wbflush();
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vdac->overWA = 0x0c; wbflush();
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vdac->over = 0xff; wbflush();
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vdac->over = 0xff; wbflush();
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vdac->over = 0xff; wbflush();
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/* Initialize the cursor position... */
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fi -> fi_cursor.width = 16;
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fi -> fi_cursor.height = 16;
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fi -> fi_cursor.x = 0;
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fi -> fi_cursor.y = 0;
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/*
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* Initialize the color map and the screen.
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*/
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bt478InitColorMap(fi);
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return (1);
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}
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/* restore the color of the cursor. */
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void
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bt478RestoreCursorColor(fi)
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struct fbinfo *fi;
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{
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VDACRegs *vdac = (VDACRegs *)(fi -> fi_vdac);
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int i;
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vdac->overWA = 0x04;
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wbflush();
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for (i = 0; i < 3; i++) {
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vdac->over = bg_RGB[i];
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wbflush();
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}
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vdac->overWA = 0x08;
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wbflush();
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vdac->over = 0x00;
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wbflush();
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vdac->over = 0x00;
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wbflush();
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vdac->over = 0x7f;
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wbflush();
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vdac->overWA = 0x0c;
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wbflush();
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for (i = 0; i < 3; i++) {
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vdac->over = fg_RGB[i];
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wbflush();
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}
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}
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/* Set the color of the cursor. */
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void
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bt478CursorColor (fi, color)
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struct fbinfo *fi;
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unsigned int color[];
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{
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int i, j;
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for (i = 0; i < 3; i++)
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bg_RGB[i] = (u_char)(color[i] >> 8);
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for (i = 3, j = 0; i < 6; i++, j++)
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fg_RGB[j] = (u_char)(color[i] >> 8);
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bt478RestoreCursorColor (fi);
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}
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/* Set the cursor foreground color to zero (used by pm.c
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for screen blanking). */
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void
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bt478BlankCursor(fi)
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struct fbinfo *fi;
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{
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VDACRegs *vdac = (VDACRegs *)(fi -> fi_vdac);
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int i;
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vdac->overWA = 0x0c;
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wbflush();
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for (i = 0; i < 3; i++) {
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vdac->over = 0;
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wbflush();
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}
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}
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/* Initialize the color map. */
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/*static*/
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void
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bt478InitColorMap (fi)
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struct fbinfo *fi;
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{
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VDACRegs *vdac = (VDACRegs *)(fi -> fi_vdac);
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int i;
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*(volatile char *)MIPS_PHYS_TO_KSEG1
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(KN01_PHYS_COLMASK_START) = 0xff; /* XXX */
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wbflush();
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if (fi -> fi_type.fb_depth == 1) {
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vdac->mapWA = 0; wbflush();
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for (i = 0; i < 256; i++) {
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((u_char *)(fi -> fi_cmap_bits)) [i * 3] = 0;
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((u_char *)(fi -> fi_cmap_bits)) [i * 3 + 1]
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= (i < 128) ? 0x00 : 0xff;
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((u_char *)(fi -> fi_cmap_bits)) [i * 3 + 2] = 0;
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vdac->map = 0;
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wbflush();
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vdac->map = (i < 128) ? 0x00 : 0xff;
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wbflush();
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vdac->map = 0;
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wbflush();
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}
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} else {
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vdac->mapWA = 0; wbflush();
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((u_char *)(fi -> fi_cmap_bits)) [0] = 0;
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((u_char *)(fi -> fi_cmap_bits)) [1] = 0;
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((u_char *)(fi -> fi_cmap_bits)) [2] = 0;
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vdac->map = 0;
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wbflush();
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vdac->map = 0;
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wbflush();
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vdac->map = 0;
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wbflush();
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for (i = 1; i < 256; i++) {
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((u_char *)(fi -> fi_cmap_bits)) [i * 3] = 0xff;
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((u_char *)(fi -> fi_cmap_bits)) [i * 3 + 1] = 0xff;
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((u_char *)(fi -> fi_cmap_bits)) [i * 3 + 2] = 0xff;
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vdac->map = 0xff;
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wbflush();
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vdac->map = 0xff;
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wbflush();
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vdac->map = 0xff;
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wbflush();
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}
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}
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for (i = 0; i < 3; i++) {
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bg_RGB[i] = 0x00;
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fg_RGB[i] = 0xff;
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}
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bt478RestoreCursorColor(fi);
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}
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/* Load the color map. */
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int
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bt478LoadColorMap(fi, bits, index, count)
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struct fbinfo *fi;
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const u_char *bits;
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int index, count;
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{
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VDACRegs *vdac = (VDACRegs *)(fi -> fi_vdac);
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u_char *cmap_bits;
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u_char *cmap;
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int i;
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if (index < 0 || count < 1 || index + count > 256)
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return EINVAL;
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cmap_bits = (u_char *)bits;
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cmap = (u_char *)(fi -> fi_cmap_bits) + index * 3;
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for (i = 0; i < count; i++) {
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vdac->mapWA = i + index; wbflush();
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cmap [i * 3] = cmap_bits [i * 3];
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vdac->map = cmap_bits [i * 3];
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wbflush();
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cmap [i * 3 + 1] = cmap_bits [i * 3 + 1];
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vdac->map = cmap_bits [i * 3 + 1];
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wbflush();
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cmap [i * 3 + 2] = cmap_bits [i * 3 + 2];
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vdac -> map = cmap_bits [i * 3 + 2];
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wbflush();
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}
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return 0;
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}
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/* Copy out count entries of the colormap starting at index into bits. */
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int
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bt478GetColorMap(fi, bits, index, count)
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struct fbinfo *fi;
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u_char *bits;
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int index, count;
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{
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u_char *cmap_bits;
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u_char *cmap;
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if (index > 256 || index < 0 || index + count > 256)
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return EINVAL;
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cmap_bits = (u_char *)bits;
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cmap = (u_char *)(fi -> fi_cmap_bits) + index * 3;
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bcopy (cmap, cmap_bits, count * 3);
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return 0;
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}
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