376 lines
9.0 KiB
C
376 lines
9.0 KiB
C
/* $NetBSD: bw2.c,v 1.25 2003/08/07 16:29:54 agc 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. 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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: bw2.c,v 1.25 2003/08/07 16:29:54 agc Exp $");
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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 <uvm/uvm_extern.h>
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#include <machine/autoconf.h>
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#include <machine/cpu.h>
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#include <dev/sun/fbio.h>
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#include <machine/idprom.h>
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#include <machine/pmap.h>
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#include <sun3/dev/fbvar.h>
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#include <sun3/dev/bw2reg.h>
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#include <sun3/dev/p4reg.h>
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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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/* If using overlay plane of something, it is... */
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int sc_ovtype; /* ... this type. */
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int sc_video_on;
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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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CFATTACH_DECL(bwtwo, sizeof(struct bw2_softc),
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bw2match, bw2attach, NULL, NULL);
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extern struct cfdriver bwtwo_cd;
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dev_type_open(bw2open);
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dev_type_ioctl(bw2ioctl);
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dev_type_mmap(bw2mmap);
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const struct cdevsw bwtwo_cdevsw = {
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bw2open, nullclose, noread, nowrite, bw2ioctl,
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nostop, notty, nopoll, bw2mmap, nokqfilter,
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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, nullclose, bw2mmap, nokqfilter,
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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 mid, p4id, peekval;
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void *p4reg;
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/* No default address support. */
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if (ca->ca_paddr == -1)
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return (0);
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/*
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* Slight hack here: The low four bits of the
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* config flags, if set, restrict the match to
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* that machine "implementation" only.
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*/
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mid = cf->cf_flags & IDM_IMPL_MASK;
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if (mid && (mid != (cpu_machine_id & IDM_IMPL_MASK)))
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return (0);
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/*
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* Make sure something is there, and if so,
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* see if it looks like a P4 register.
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*/
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p4reg = bus_tmapin(ca->ca_bustype, ca->ca_paddr);
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peekval = peek_long(p4reg);
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p4id = (peekval == -1) ?
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P4_NOTFOUND : fb_pfour_id(p4reg);
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bus_tmapout(p4reg);
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if (peekval == -1)
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return (0);
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/*
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* The config flag 0x40 if set means we should match
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* only on a CG? overlay plane. We can use only the
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* CG4 and CG8, which both have a P4 register.
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*/
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if (cf->cf_flags & 0x40) {
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switch (p4id) {
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case P4_ID_COLOR8P1:
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case P4_ID_COLOR24:
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return (1);
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case P4_NOTFOUND:
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default:
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return (0);
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}
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}
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/*
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* OK, we are expecting a plain old BW2, and
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* there may or may not be a P4 register.
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*/
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switch (p4id) {
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case P4_ID_BW:
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case P4_NOTFOUND:
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return (1);
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default:
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#ifdef DEBUG
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printf("bwtwo at 0x%x match p4id=0x%x fails\n",
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ca->ca_paddr, p4id & 0xFF);
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#endif
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break;
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}
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return (0);
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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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void *p4reg;
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int p4id, tmp;
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int pixeloffset; /* offset to framebuffer */
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fbt = &fb->fb_fbtype;
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fbt->fb_type = FBTYPE_SUN2BW;
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fbt->fb_width = 1152; /* default - see below */
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fbt->fb_height = 900; /* default - see below */
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fbt->fb_depth = 1;
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fbt->fb_cmsize = 0;
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fbt->fb_size = BW2_FBSIZE; /* default - see below */
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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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fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags;
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/* Set up default pixel offset. May be changed below. */
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pixeloffset = 0;
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/* Does it have a P4 register? */
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p4reg = bus_mapin(ca->ca_bustype, ca->ca_paddr, 4);
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p4id = fb_pfour_id(p4reg);
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if (p4id != P4_NOTFOUND)
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fb->fb_pfour = p4reg;
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else
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bus_mapout(p4reg, 4);
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switch (p4id) {
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case P4_NOTFOUND:
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pixeloffset = 0;
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break;
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case P4_ID_BW:
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pixeloffset = P4_BW_OFF;
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break;
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default:
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printf("%s: bad p4id=0x%x\n", fb->fb_name, p4id);
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/* Must be some kinda color... */
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/* fall through */
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case P4_ID_COLOR8P1:
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case P4_ID_COLOR24:
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sc->sc_ovtype = p4id;
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pixeloffset = P4_COLOR_OFF_OVERLAY;
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break;
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}
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sc->sc_phys = ca->ca_paddr + pixeloffset;
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/*
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* Determine width and height as follows:
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* If it has a P4 register, use that;
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* else if unit==0, use the EEPROM size,
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* else make our best guess.
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*/
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if (fb->fb_pfour)
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fb_pfour_setsize(fb);
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else if (sc->sc_dev.dv_unit == 0)
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fb_eeprom_setsize(fb);
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else {
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/* Guess based on machine ID. */
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switch (cpu_machine_id) {
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#ifdef _SUN3_
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case SUN3_MACH_60:
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/*
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* Only the model 60 can have hi-res.
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* Look at the "resolution" jumper.
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*/
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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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goto high_res;
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break;
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case SUN3_MACH_260:
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/* The Sun3/260 is ALWAYS high-resolution! */
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/* fall through */
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high_res:
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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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break;
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#endif /* SUN3 */
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default:
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/* Leave the defaults set above. */
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break;
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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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/* Make sure video is on. */
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tmp = 1;
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bw2svideo(fb, &tmp);
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/* Let /dev/fb know we are here. */
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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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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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paddr_t
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bw2mmap(dev, off, prot)
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dev_t dev;
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off_t off;
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int prot;
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{
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struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)];
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int size = sc->sc_fb.fb_fbtype.fb_size;
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if (off & PGOFSET)
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panic("bw2mmap");
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if ((off < 0) || (off >= 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 without it.
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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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struct bw2_softc *sc = fb->fb_private;
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int *on = data;
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*on = sc->sc_video_on;
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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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struct bw2_softc *sc = fb->fb_private;
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int *on = data;
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if (sc->sc_video_on == *on)
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return (0);
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sc->sc_video_on = *on;
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if (fb->fb_pfour)
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fb_pfour_set_video(fb, sc->sc_video_on);
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else
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enable_video(sc->sc_video_on);
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return(0);
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}
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