305 lines
9.1 KiB
C
305 lines
9.1 KiB
C
/* $NetBSD: cfb.c,v 1.38 2000/02/03 04:09:13 nisimura 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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* from: @(#)sfb.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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/*
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* Mach Operating System
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* Copyright (c) 1991,1990,1989 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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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/fcntl.h>
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#include <sys/device.h>
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#include <dev/tc/tcvar.h>
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#include <machine/autoconf.h>
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#include <machine/pmioctl.h>
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#include <machine/fbio.h>
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#include <machine/fbvar.h>
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#include <pmax/dev/bt459.h>
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#include <pmax/dev/cfbvar.h>
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#include <pmax/dev/fbreg.h>
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/*
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* These need to be mapped into user space.
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*/
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static struct fbuaccess cfbu;
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static struct pmax_fbtty cfbfb;
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static struct fbinfo *cfb_fi;
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/*
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* Method table for standard framebuffer operations on a CFB.
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* The CFB uses a Brooktree bt479 ramdac.
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*/
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struct fbdriver cfb_driver = {
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bt459_video_on,
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bt459_video_off,
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bt459InitColorMap,
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bt459GetColorMap,
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bt459LoadColorMap,
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bt459PosCursor,
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bt459LoadCursor,
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bt459CursorColor
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};
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#define CFB_OFFSET_VRAM 0x0 /* from module's base */
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#define CFB_OFFSET_BT459 0x200000 /* Bt459 registers */
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#define CFB_OFFSET_IREQ 0x300000 /* Interrupt req. control */
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#define CFB_OFFSET_ROM 0x380000 /* Diagnostic ROM */
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#define CFB_OFFSET_RESET 0x3c0000 /* Bt459 resets on writes */
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#define CFB_FB_SIZE 0x100000 /* frame buffer size */
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/*
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* Autoconfiguration data for config.new.
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* Use static-sized softc until config.old and old autoconfig
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* code is completely gone.
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*/
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static int cfbmatch __P((struct device *, struct cfdata *, void *));
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static void cfbattach __P((struct device *, struct device *, void *));
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static int cfbinit __P((struct fbinfo *, caddr_t, int, int));
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static int cfb_intr __P((void *sc));
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struct cfattach cfb_ca = {
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sizeof(struct fbsoftc), cfbmatch, cfbattach
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};
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int
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cfb_cnattach(addr)
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paddr_t addr;
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{
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struct fbinfo *fi;
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fbcnalloc(&fi);
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cfbinit(fi, (caddr_t)addr, 0, 1);
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cfb_fi = fi;
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return (1);
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}
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static int
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cfbmatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct tc_attach_args *ta = aux;
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/* make sure that we're looking for this type of device. */
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if (!TC_BUS_MATCHNAME(ta, "PMAG-BA "))
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return (0);
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return (1);
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}
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/*
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* Attach a device. Hand off all the work to cfbinit(),
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* so console-config code can attach cfb devices very early in boot,
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* to use as system console.
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*/
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static void
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cfbattach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct tc_attach_args *ta = aux;
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caddr_t base = (caddr_t)(ta->ta_addr);
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int unit = self->dv_unit;
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struct fbinfo *fi;
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if (cfb_fi)
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fi = cfb_fi;
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else {
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/* Allocate a struct fbinfo and point the softc at it */
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if (fballoc(&fi) < 0 || cfbinit(fi, base, unit, 0) < 0)
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return; /* failed */
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}
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((struct fbsoftc *)self)->sc_fi = fi;
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printf(": %dx%dx%d%s",
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fi->fi_type.fb_width,
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fi->fi_type.fb_height,
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fi->fi_type.fb_depth,
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(cfb_fi) ? " console" : "");
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/*
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* 3MIN does not mask un-established TC option interrupts,
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* so establish a handler.
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* XXX Should store cmap updates in softc and apply in the
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* interrupt handler, which interrupts during vertical-retrace.
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*/
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tc_intr_establish(parent, ta->ta_cookie, TC_IPL_NONE, cfb_intr, fi);
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printf("\n");
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}
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/*
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* CFB initialization. This is divorced from cfbattch() so that
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* a console framebuffer can be initialized early during boot.
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*/
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static int
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cfbinit(fi, cfbaddr, unit, silent)
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struct fbinfo *fi;
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caddr_t cfbaddr;
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int unit;
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int silent;
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{
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/* check for no frame buffer */
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if (badaddr(cfbaddr, 4)) {
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printf("cfb: bad address 0x%p\n", cfbaddr);
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return (0);
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}
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/* Fill in main frame buffer info struct. */
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fi->fi_unit = unit;
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fi->fi_pixels = (caddr_t)(cfbaddr + CFB_OFFSET_VRAM);
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fi->fi_pixelsize = 1024 * 864;
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fi->fi_base = (caddr_t)(cfbaddr + CFB_OFFSET_VRAM);
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fi->fi_vdac = (caddr_t)(cfbaddr + CFB_OFFSET_BT459);
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fi->fi_size = (fi->fi_pixels + CFB_FB_SIZE) - fi->fi_base;
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fi->fi_linebytes = 1024;
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fi->fi_driver = &cfb_driver;
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fi->fi_blanked = 0;
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/* Fill in Frame Buffer Type struct. */
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fi->fi_type.fb_boardtype = PMAX_FBTYPE_CFB;
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fi->fi_type.fb_width = 1024;
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fi->fi_type.fb_height = 864;
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fi->fi_type.fb_depth = 8;
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fi->fi_type.fb_cmsize = 256;
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fi->fi_type.fb_size = CFB_FB_SIZE;
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/* Reset the chip */
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if (!bt459init(fi)) {
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printf("cfb%d: vdac init failed.\n", unit);
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return (0);
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}
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/*
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* qvss/pm-style mmap()ed event queue compatibility glue
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*/
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/*
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* Must be in Uncached space since the fbuaccess structure is
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* mapped into the user's address space uncached.
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*/
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fi->fi_fbu = (struct fbuaccess *)
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MIPS_PHYS_TO_KSEG1(MIPS_KSEG0_TO_PHYS(&cfbu));
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/* This is glass-tty state but it's in the shared structure. Ick. */
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fi->fi_fbu->scrInfo.max_row = 56;
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fi->fi_fbu->scrInfo.max_col = 80;
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init_pmaxfbu(fi);
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/* Initialize old-style pmax glass-tty screen info. */
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fi->fi_glasstty = &cfbfb;
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if (tb_kbdmouseconfig(fi))
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return (-1);
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fbconnect(fi);
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return (1);
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}
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/*
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* The original TURBOChannel cfb interrupts on every vertical
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* retrace, and we can't disable the board from requesting those
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* interrupts. The 4.4BSD kernel never enabled those interrupts;
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* but there's a kernel design bug on the 3MIN, where disabling
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* (or enabling) TC option interrupts has no effect the interrupts
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* are mapped to R3000 interrupts and always seem to be taken.
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* This function simply dismisses CFB interrupts, or the interrupt
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* request from the card will still be active.
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*/
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static int
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cfb_intr(sc)
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void *sc;
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{
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struct fbinfo *fi;
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caddr_t slot_addr;
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fi = (struct fbinfo *)sc;
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slot_addr = (((caddr_t)fi->fi_base) - CFB_OFFSET_VRAM);
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/* reset vertical-retrace interrupt by writing a dont-care */
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*(int*) (slot_addr + CFB_OFFSET_IREQ) = 0;
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return (0);
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}
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