249 lines
7.1 KiB
C
249 lines
7.1 KiB
C
/*
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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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* from: Header: bwtwo.c,v 1.14 92/11/26 02:28:04 torek Exp
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* $Id: bwtwo.c,v 1.2 1993/10/11 02:45:49 deraadt Exp $
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*/
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/*
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* black&white display (bwtwo) 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/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/tty.h>
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#include <machine/fbio.h>
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#include <machine/autoconf.h>
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#include <machine/pmap.h>
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#include <machine/fbvar.h>
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#include <sparc/sbus/bwtworeg.h>
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#include <sparc/sbus/sbusvar.h>
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/* per-display variables */
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struct bwtwo_softc {
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struct device sc_dev; /* base device */
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struct sbusdev sc_sd; /* sbus device */
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struct fbdevice sc_fb; /* frame buffer device */
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volatile struct bwtworeg *sc_reg;/* control registers */
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caddr_t sc_phys; /* display RAM (phys addr) */
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};
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/* autoconfiguration driver */
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static void bwtwoattach(struct device *, struct device *, void *);
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struct cfdriver bwtwocd =
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{ NULL, "bwtwo", matchbyname, bwtwoattach,
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DV_DULL, sizeof(struct bwtwo_softc) };
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/* XXX we do not handle frame buffer interrupts (do not know how) */
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/* frame buffer generic driver */
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static void bwtwounblank(struct device *);
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static struct fbdriver bwtwofbdriver = { bwtwounblank };
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extern int fbnode;
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extern struct tty *fbconstty;
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extern int (*v_putc)();
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extern int nullop();
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static int bwtwo_cnputc();
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static struct bwtwo_softc *bwcons;
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#define BWTWO_MAJOR 27 /* XXX */
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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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void
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bwtwoattach(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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register struct bwtwo_softc *sc = (struct bwtwo_softc *)self;
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register struct sbus_attach_args *sa = args;
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register int node = sa->sa_ra.ra_node, ramsize;
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register struct bwtwo_all *p;
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int isconsole;
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sc->sc_fb.fb_major = BWTWO_MAJOR; /* XXX to be removed */
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sc->sc_fb.fb_driver = &bwtwofbdriver;
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sc->sc_fb.fb_device = &sc->sc_dev;
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/*
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* The defaults below match my screen, but are not guaranteed
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* to be correct as defaults go...
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*/
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sc->sc_fb.fb_type.fb_type = FBTYPE_SUN2BW;
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sc->sc_fb.fb_type.fb_width = getpropint(node, "width", 1152);
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sc->sc_fb.fb_type.fb_height = getpropint(node, "height", 900);
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sc->sc_fb.fb_linebytes = getpropint(node, "linebytes", 144);
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ramsize = sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes;
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sc->sc_fb.fb_type.fb_depth = 1;
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sc->sc_fb.fb_type.fb_cmsize = 0;
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sc->sc_fb.fb_type.fb_size = ramsize;
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printf(": %s, %d x %d", getpropstring(node, "model"),
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sc->sc_fb.fb_type.fb_width, sc->sc_fb.fb_type.fb_height);
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/*
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* When the ROM has mapped in a bwtwo display, the address
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* maps only the video RAM, so in any case we have to map the
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* registers ourselves. We only need the video RAM if we are
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* going to print characters via rconsole.
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*/
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isconsole = node == fbnode && fbconstty != NULL;
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p = (struct bwtwo_all *)sa->sa_ra.ra_paddr;
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if ((sc->sc_fb.fb_pixels = sa->sa_ra.ra_vaddr) == NULL && isconsole) {
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/* this probably cannot happen, but what the heck */
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sc->sc_fb.fb_pixels = mapiodev(p->ba_ram, ramsize);
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}
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sc->sc_reg = (volatile struct bwtworeg *)
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mapiodev((caddr_t)&p->ba_reg, sizeof(p->ba_reg));
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sc->sc_phys = p->ba_ram;
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/* Insure video is enabled */
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sc->sc_reg->bw_ctl |= CTL_VE;
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if (isconsole) {
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printf(" (console)\n");
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#ifdef RCONSOLE
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rcons_init(&sc->sc_fb);
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#endif
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} else
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printf("\n");
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sbus_establish(&sc->sc_sd, &sc->sc_dev);
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if (node == fbnode)
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fb_attach(&sc->sc_fb);
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}
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int
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bwtwoopen(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 >= bwtwocd.cd_ndevs || bwtwocd.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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bwtwoclose(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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bwtwoioctl(dev, cmd, data, flags, p)
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dev_t dev;
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int 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 bwtwo_softc *sc = bwtwocd.cd_devs[minor(dev)];
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switch (cmd) {
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case FBIOGTYPE:
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*(struct fbtype *)data = sc->sc_fb.fb_type;
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break;
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case FBIOGVIDEO:
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*(int *)data = (sc->sc_reg->bw_ctl & CTL_VE) != 0;
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break;
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case FBIOSVIDEO:
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if (*(int *)data)
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sc->sc_reg->bw_ctl |= CTL_VE;
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else
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sc->sc_reg->bw_ctl &= ~CTL_VE;
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break;
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default:
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return (ENOTTY);
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}
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return (0);
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}
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static void
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bwtwounblank(dev)
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struct device *dev;
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{
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struct bwtwo_softc *sc = (struct bwtwo_softc *)dev;
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sc->sc_reg->bw_ctl |= CTL_VE;
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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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bwtwomap(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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register struct bwtwo_softc *sc = bwtwocd.cd_devs[minor(dev)];
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if (off & PGOFSET)
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panic("bwtwomap");
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if ((unsigned)off >= sc->sc_fb.fb_type.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 ((int)sc->sc_phys + off + PMAP_OBIO + PMAP_NC);
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}
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