419 lines
10 KiB
C
419 lines
10 KiB
C
/* $NetBSD: cg4.c,v 1.9 1996/10/11 00:46:33 christos 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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* from: @(#)cgthree.c 8.2 (Berkeley) 10/30/93
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*/
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/*
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* color display (cg4) 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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* XXX should defer colormap updates to vertical retrace interrupts
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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 <vm/vm.h>
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#include <machine/cpu.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 "fbvar.h"
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#include "btreg.h"
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#include "btvar.h"
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#include "cg4reg.h"
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extern unsigned char cpu_machine_id;
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/* per-display variables */
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struct cg4_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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volatile struct bt_regs *sc_bt; /* Brooktree registers */
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int sc_phys; /* display RAM (phys addr) */
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int sc_blanked; /* true if blanked */
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union bt_cmap sc_cmap; /* Brooktree color map */
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};
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/* autoconfiguration driver */
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static void cg4attach __P((struct device *, struct device *, void *));
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static int cg4match __P((struct device *, void *, void *));
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struct cfattach cgfour_ca = {
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sizeof(struct cg4_softc), cg4match, cg4attach
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};
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struct cfdriver cgfour_cd = {
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NULL, "cgfour", DV_DULL
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};
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/* frame buffer generic driver */
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int cg4open(), cg4close(), cg4mmap();
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static int cg4gattr __P((struct fbdevice *, struct fbgattr *));
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static int cg4gvideo __P((struct fbdevice *, int *));
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static int cg4svideo __P((struct fbdevice *, int *));
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static int cg4getcmap __P((struct fbdevice *, struct fbcmap *));
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static int cg4putcmap __P((struct fbdevice *, struct fbcmap *));
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static struct fbdriver cg4fbdriver = {
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cg4open, cg4close, cg4mmap, cg4gattr,
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cg4gvideo, cg4svideo,
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cg4getcmap, cg4putcmap };
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static void cg4loadcmap __P((struct cg4_softc *, int, int));
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/*
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* Match a cg4.
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*/
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static int
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cg4match(parent, vcf, args)
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struct device *parent;
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void *vcf, *args;
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{
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struct confargs *ca = args;
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int paddr, x;
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/* XXX - Huge hack due to lack of probe info... */
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switch (cpu_machine_id) {
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/* Machines that might have a cg4 (gag). */
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case SUN3_MACH_50:
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case SUN3_MACH_60:
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case SUN3_MACH_110:
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break;
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default:
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return (0);
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}
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if (ca->ca_paddr == -1)
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ca->ca_paddr = 0xFF200000;
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paddr = ca->ca_paddr;
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x = bus_peek(ca->ca_bustype, paddr, 1);
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if (x == -1)
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return (0);
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paddr += CG4REG_PIXMAP;
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x = bus_peek(ca->ca_bustype, paddr, 1);
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if (x == -1)
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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 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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cg4attach(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 cg4_softc *sc = (struct cg4_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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volatile struct bt_regs *bt;
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int i;
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fb->fb_driver = &cg4fbdriver;
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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_SUN4COLOR;
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fbt->fb_depth = 8;
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fbt->fb_cmsize = 256;
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fbt->fb_width = 1152;
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fbt->fb_height = 900;
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fbt->fb_size = CG4_MMAP_SIZE;
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sc->sc_phys = ca->ca_paddr;
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sc->sc_bt = bt = (volatile struct bt_regs *)
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bus_mapin(ca->ca_bustype, ca->ca_paddr,
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sizeof(struct bt_regs *));
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/* grab initial (current) color map */
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bt->bt_addr = 0;
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for (i = 0; i < (256 * 3 / 4); i++)
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sc->sc_cmap.cm_chip[i] = bt->bt_cmap;
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/*
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* BT458 chip initialization as described in Brooktree's
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* 1993 Graphics and Imaging Product Databook (DB004-1/93).
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*/
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bt->bt_addr = 0x04; /* select read mask register */
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bt->bt_ctrl = 0xff; /* all planes on */
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bt->bt_addr = 0x05; /* select blink mask register */
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bt->bt_ctrl = 0x00; /* all planes non-blinking */
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bt->bt_addr = 0x06; /* select command register */
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bt->bt_ctrl = 0x43; /* palette enabled, overlay planes enabled */
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bt->bt_addr = 0x07; /* select test register */
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bt->bt_ctrl = 0x00; /* set test mode */
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kprintf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height);
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fb_attach(fb, 4);
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}
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int
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cg4open(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 >= cgfour_cd.cd_ndevs || cgfour_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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cg4close(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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cg4ioctl(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 cg4_softc *sc = cgfour_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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* X11 expects its mmap'd region to look like this:
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* 128k overlay memory
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* 128k overlay-enable bitmap
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* 1024k color memory
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*
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* The hardware really looks like this (starting at ca_paddr)
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* 4 bytes Brooktree DAC registers
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* 2MB-4 gap
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* 128k overlay memory
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* 1920k gap
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* 128k overlay-enable bitmap
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* 1920k gap
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* 1024k color memory
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*/
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int
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cg4mmap(dev, off, prot)
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dev_t dev;
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register int off;
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int prot;
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{
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struct cg4_softc *sc = cgfour_cd.cd_devs[minor(dev)];
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register int physbase;
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if (off & PGOFSET)
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panic("cg4mmap");
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if ((unsigned)off >= CG4_MMAP_SIZE)
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return (-1);
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physbase = sc->sc_phys;
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if (off < 0x40000) {
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if (off < 0x20000) {
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/* overlay plane */
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physbase += CG4REG_OVERLAY;
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} else {
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/* enable plane */
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off -= 0x20000;
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physbase += CG4REG_ENABLE;
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}
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} else {
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/* pixel map */
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off -= 0x40000;
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physbase += CG4REG_PIXMAP;
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}
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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 ((physbase + off) | PMAP_NC);
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}
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/*
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* Internal ioctl functions.
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*/
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/* FBIOGATTR: */
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static int cg4gattr(fb, fba)
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struct fbdevice *fb;
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struct fbgattr *fba;
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{
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fba->real_type = fb->fb_fbtype.fb_type;
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fba->owner = 0; /* XXX - TIOCCONS stuff? */
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fba->fbtype = fb->fb_fbtype;
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fba->sattr.flags = 0;
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fba->sattr.emu_type = fb->fb_fbtype.fb_type;
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fba->sattr.dev_specific[0] = -1;
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fba->emu_types[0] = fb->fb_fbtype.fb_type;
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fba->emu_types[1] = -1;
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return (0);
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}
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/* FBIOGVIDEO: */
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static int cg4gvideo(fb, on)
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struct fbdevice *fb;
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int *on;
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{
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struct cg4_softc *sc = fb->fb_private;
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*on = !sc->sc_blanked;
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return (0);
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}
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/* FBIOSVIDEO: */
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static int cg4svideo(fb, on)
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struct fbdevice *fb;
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int *on;
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{
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struct cg4_softc *sc = fb->fb_private;
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register volatile struct bt_regs *bt = sc->sc_bt;
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if ((*on == 0) && (sc->sc_blanked == 0)) {
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/* Turn OFF video (blank it). */
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bt->bt_addr = 0x06; /* command reg */
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bt->bt_ctrl = 0x70; /* overlay plane */
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bt->bt_addr = 0x04; /* read mask */
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bt->bt_ctrl = 0x00; /* color planes */
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/*
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* Set color 0 to black -- note that this overwrites
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* R of color 1.
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*/
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bt->bt_addr = 0;
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bt->bt_cmap = 0;
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sc->sc_blanked = 1;
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}
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if ((*on != 0) && (sc->sc_blanked != 0)) {
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/* Turn video back ON (unblank). */
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sc->sc_blanked = 0;
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/* restore color 0 (and R of color 1) */
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bt->bt_addr = 0;
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bt->bt_cmap = sc->sc_cmap.cm_chip[0];
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/* restore read mask */
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bt->bt_addr = 0x06; /* command reg */
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bt->bt_ctrl = 0x73; /* overlay plane */
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bt->bt_addr = 0x04; /* read mask */
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bt->bt_ctrl = 0xff; /* color planes */
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}
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return (0);
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}
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/* FBIOGETCMAP: */
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static int cg4getcmap(fb, cmap)
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struct fbdevice *fb;
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struct fbcmap *cmap;
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{
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struct cg4_softc *sc = fb->fb_private;
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return (bt_getcmap(cmap, &sc->sc_cmap, 256));
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}
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/* FBIOPUTCMAP: */
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static int cg4putcmap(fb, cmap)
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struct fbdevice *fb;
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struct fbcmap *cmap;
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{
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struct cg4_softc *sc = fb->fb_private;
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int error;
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/* copy to software map */
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error = bt_putcmap(cmap, &sc->sc_cmap, 256);
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if (error == 0) {
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/* now blast them into the chip */
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/* XXX should use retrace interrupt */
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cg4loadcmap(sc, cmap->index, cmap->count);
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}
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return (error);
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}
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/*
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* Load a subset of the current (new) colormap into the Brooktree DAC.
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*/
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static void
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cg4loadcmap(sc, start, ncolors)
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struct cg4_softc *sc;
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int start, ncolors;
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{
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volatile struct bt_regs *bt;
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u_int *ip;
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int count;
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ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */
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count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
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bt = sc->sc_bt;
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bt->bt_addr = BT_D4M4(start);
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while (--count >= 0)
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bt->bt_cmap = *ip++;
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}
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