276 lines
6.7 KiB
C
276 lines
6.7 KiB
C
/* $NetBSD: bw2.c,v 1.9 1996/12/17 21:10:37 gwr 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 software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* 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, Lawrence Berkeley Laboratory.
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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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* @(#)bwtwo.c 8.1 (Berkeley) 6/11/93
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*/
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/*
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* black&white display (bw2) driver.
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*
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* Does not handle interrupts, even though they can occur.
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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/conf.h>
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#include <sys/device.h>
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#include <sys/ioctl.h>
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#include <sys/malloc.h>
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#include <sys/mman.h>
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#include <sys/proc.h>
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#include <sys/tty.h>
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#include <vm/vm.h>
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#include <machine/autoconf.h>
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#include <machine/control.h>
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#include <machine/cpu.h>
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#include <machine/fbio.h>
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#include <machine/idprom.h>
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#include <machine/pmap.h>
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#include "fbvar.h"
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#include "bw2reg.h"
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cdev_decl(bw2);
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/* per-display variables */
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struct bw2_softc {
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struct device sc_dev; /* base device */
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struct fbdevice sc_fb; /* frame buffer device */
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int sc_phys; /* display RAM (phys addr) */
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};
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/* autoconfiguration driver */
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static void bw2attach __P((struct device *, struct device *, void *));
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static int bw2match __P((struct device *, struct cfdata *, void *));
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struct cfattach bwtwo_ca = {
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sizeof(struct bw2_softc), bw2match, bw2attach
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};
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struct cfdriver bwtwo_cd = {
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NULL, "bwtwo", DV_DULL
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};
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/* XXX we do not handle frame buffer interrupts */
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static int bw2gvideo __P((struct fbdevice *, void *));
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static int bw2svideo __P((struct fbdevice *, void *));
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static struct fbdriver bw2fbdriver = {
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bw2open, bw2close, bw2mmap,
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fb_noioctl,
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bw2gvideo, bw2svideo,
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fb_noioctl, fb_noioctl, };
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static int
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bw2match(parent, cf, args)
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struct device *parent;
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struct cfdata *cf;
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void *args;
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{
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struct confargs *ca = args;
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int x;
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#if 0 /* XXX - Assume only one is in use anyway... */
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/*
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* This driver only supports one unit because the
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* system enable register is used for blanking.
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*/
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if (cf->cf_unit != 0)
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return (0);
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#endif
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if (ca->ca_paddr == -1) {
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if (cpu_machine_id == SUN3_MACH_50)
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ca->ca_paddr = BW2_50_PADDR;
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else
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ca->ca_paddr = BW2_FB_PADDR;
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}
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/* The peek returns -1 on bus error. */
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x = bus_peek(ca->ca_bustype, ca->ca_paddr, 1);
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return (x != -1);
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}
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/*
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* Attach a display. We need to notice if it is the console, too.
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*/
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static void
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bw2attach(parent, self, args)
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struct device *parent, *self;
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void *args;
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{
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struct bw2_softc *sc = (struct bw2_softc *)self;
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struct fbdevice *fb = &sc->sc_fb;
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struct confargs *ca = args;
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struct fbtype *fbt;
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sc->sc_phys = ca->ca_paddr;
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fb->fb_driver = &bw2fbdriver;
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fb->fb_private = sc;
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fb->fb_name = sc->sc_dev.dv_xname;
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fbt = &fb->fb_fbtype;
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fbt->fb_type = FBTYPE_SUN2BW;
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fbt->fb_depth = 1;
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fbt->fb_cmsize = 0;
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fbt->fb_width = 1152;
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fbt->fb_height = 900;
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fbt->fb_size = BW2_FBSIZE;
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/*
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* Only the model 60 can have hi-res.
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* XXX - Use PROM screen size values?
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*/
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if (cpu_machine_id == SUN3_MACH_60) {
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int tmp;
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tmp = bus_peek(BUS_OBMEM, BW2_CR_PADDR, 1);
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if ((tmp != -1) && (tmp & 0x80) == 0) {
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fbt->fb_width = 1600;
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fbt->fb_height = 1280;
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fbt->fb_size = BW2_FBSIZE_HIRES;
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}
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}
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printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height);
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fb_attach(fb, 1);
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}
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int
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bw2open(dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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int unit = minor(dev);
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if (unit >= bwtwo_cd.cd_ndevs || bwtwo_cd.cd_devs[unit] == NULL)
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return (ENXIO);
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return (0);
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}
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int
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bw2close(dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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return (0);
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}
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int
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bw2ioctl(dev, cmd, data, flags, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flags;
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struct proc *p;
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{
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struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)];
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return (fbioctlfb(&sc->sc_fb, cmd, data));
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}
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/*
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* Return the address that would map the given device at the given
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* offset, allowing for the given protection, or return -1 for error.
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*/
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int
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bw2mmap(dev, off, prot)
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dev_t dev;
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int off, prot;
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{
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struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)];
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if (off & PGOFSET)
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return (-1);
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if ((unsigned)off >= sc->sc_fb.fb_fbtype.fb_size)
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return (-1);
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/*
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* I turned on PMAP_NC here to disable the cache as I was
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* getting horribly broken behaviour with it on.
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*/
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return ((sc->sc_phys + off) | PMAP_NC);
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}
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/* FBIOGVIDEO: */
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static int bw2gvideo(fb, data)
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struct fbdevice *fb;
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void *data;
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{
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int *on = data;
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int s, ena;
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s = splhigh();
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ena = get_control_byte((char *)SYSTEM_ENAB);
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splx(s);
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*on = (ena & SYSTEM_ENAB_VIDEO) ? 1 : 0;
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return (0);
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}
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/* FBIOSVIDEO */
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static int bw2svideo(fb, data)
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struct fbdevice *fb;
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void *data;
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{
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int *on = data;
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int s, ena;
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s = splhigh();
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ena = get_control_byte((char *)SYSTEM_ENAB);
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if (*on) ena |= SYSTEM_ENAB_VIDEO;
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else ena &= ~SYSTEM_ENAB_VIDEO;
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set_control_byte((char *)SYSTEM_ENAB, ena);
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splx(s);
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return(0);
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}
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