522 lines
13 KiB
C
522 lines
13 KiB
C
/* $NetBSD: cgeight.c,v 1.12 1996/12/10 22:54:48 pk Exp $ */
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/*
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* Copyright (c) 1996 Jason R. Thorpe. All rights reserved.
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* Copyright (c) 1995 Theo de Raadt
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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 (cgeight) 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/systm.h>
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#include <sys/buf.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 <sys/conf.h>
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#include <vm/vm.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 <machine/eeprom.h>
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#include <machine/conf.h>
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#include <sparc/dev/btreg.h>
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#include <sparc/dev/btvar.h>
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#include <sparc/dev/pfourreg.h>
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/* per-display variables */
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struct cgeight_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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struct rom_reg sc_phys; /* display RAM (phys addr) */
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volatile struct fbcontrol *sc_fbc; /* Brooktree registers */
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int sc_bustype; /* type of bus we live on */
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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 cgeightattach(struct device *, struct device *, void *);
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static int cgeightmatch(struct device *, struct cfdata *, void *);
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#if defined(SUN4)
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static void cgeightunblank __P((struct device *));
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#endif
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/* cdevsw prototypes */
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cdev_decl(cgeight);
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struct cfattach cgeight_ca = {
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sizeof(struct cgeight_softc), cgeightmatch, cgeightattach
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};
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struct cfdriver cgeight_cd = {
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NULL, "cgeight", DV_DULL
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};
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#if defined(SUN4)
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/* frame buffer generic driver */
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static struct fbdriver cgeightfbdriver = {
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cgeightunblank, cgeightopen, cgeightclose, cgeightioctl,
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cgeightpoll, cgeightmmap
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};
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extern int fbnode;
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extern struct tty *fbconstty;
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static void cgeightloadcmap __P((struct cgeight_softc *, int, int));
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static int cgeight_get_video __P((struct cgeight_softc *));
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static void cgeight_set_video __P((struct cgeight_softc *, int));
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#endif
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/*
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* Match a cgeight.
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*/
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int
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cgeightmatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct confargs *ca = aux;
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struct romaux *ra = &ca->ca_ra;
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if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
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return (0);
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/*
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* Mask out invalid flags from the user.
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*/
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cf->cf_flags &= FB_USERMASK;
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/*
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* Only exists on a sun4.
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*/
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if (!CPU_ISSUN4)
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return (0);
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/*
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* Only exists on obio.
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*/
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if (ca->ca_bustype != BUS_OBIO)
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return (0);
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/*
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* Make sure there's hardware there.
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*/
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if (probeget(ra->ra_vaddr, 4) == -1)
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return (0);
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#if defined(SUN4)
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/*
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* Check the pfour register.
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*/
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if (fb_pfour_id(ra->ra_vaddr) == PFOUR_ID_COLOR24) {
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cf->cf_flags |= FB_PFOUR;
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return (1);
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}
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#endif
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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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void
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cgeightattach(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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#if defined(SUN4)
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register struct cgeight_softc *sc = (struct cgeight_softc *)self;
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register struct confargs *ca = args;
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register int node = 0, ramsize, i;
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register volatile struct bt_regs *bt;
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struct fbdevice *fb = &sc->sc_fb;
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int isconsole;
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fb->fb_driver = &cgeightfbdriver;
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fb->fb_device = &sc->sc_dev;
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fb->fb_type.fb_type = FBTYPE_MEMCOLOR;
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fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags;
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/*
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* Only pfour cgfours, thank you...
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*/
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if ((ca->ca_bustype != BUS_OBIO) ||
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((fb->fb_flags & FB_PFOUR) == 0)) {
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printf("%s: ignoring; not a pfour\n", sc->sc_dev.dv_xname);
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return;
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}
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/* Map the pfour register. */
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fb->fb_pfour = (volatile u_int32_t *)mapiodev(ca->ca_ra.ra_reg, 0,
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sizeof(u_int32_t), ca->ca_bustype);
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ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY;
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fb->fb_type.fb_depth = 24;
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fb_setsize(fb, fb->fb_type.fb_depth, 1152, 900, node, ca->ca_bustype);
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sc->sc_fb.fb_type.fb_cmsize = 256;
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sc->sc_fb.fb_type.fb_size = ramsize;
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printf(": cgeight/p4, %d x %d", fb->fb_type.fb_width,
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fb->fb_type.fb_height);
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isconsole = 0;
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if (cputyp == CPU_SUN4) {
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struct eeprom *eep = (struct eeprom *)eeprom_va;
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/*
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* Assume this is the console if there's no eeprom info
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* to be found.
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*/
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if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT)
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isconsole = (fbconstty != NULL);
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}
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#if 0
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/*
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* We don't do any of the console handling here. Instead,
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* we let the bwtwo driver pick up the overlay plane and
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* use it instead. Rconsole should have better performance
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* with the 1-bit depth.
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* -- Jason R. Thorpe <thorpej@NetBSD.ORG>
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*/
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/*
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* When the ROM has mapped in a cgfour 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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if (isconsole) {
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/* XXX this is kind of a waste */
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fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg,
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PFOUR_COLOR_OFF_OVERLAY, ramsize, ca->ca_bustype);
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}
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#endif
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/* Map the Brooktree. */
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sc->sc_fbc = (volatile struct fbcontrol *)mapiodev(ca->ca_ra.ra_reg,
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PFOUR_COLOR_OFF_CMAP, sizeof(struct fbcontrol), ca->ca_bustype);
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sc->sc_phys = ca->ca_ra.ra_reg[0];
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sc->sc_bustype = ca->ca_bustype;
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#if 0 /* XXX thorpej ??? */
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/* tell the enable plane to look at the mono image */
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memset(ca->ca_ra.ra_vaddr, 0xff,
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sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8);
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#endif
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/* grab initial (current) color map */
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bt = &sc->sc_fbc->fbc_dac;
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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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BT_INIT(bt, 0);
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#if 0 /* see above */
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if (isconsole) {
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printf(" (console)\n");
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#if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */
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fbrcons_init(fb);
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#endif
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} else
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#endif /* 0 */
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printf("\n");
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/*
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* Even though we're not using rconsole, we'd still like
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* to notice if we're the console framebuffer.
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*/
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fb_attach(&sc->sc_fb, isconsole);
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#endif
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}
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int
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cgeightopen(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 >= cgeight_cd.cd_ndevs || cgeight_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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cgeightclose(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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cgeightioctl(dev, cmd, data, flags, p)
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dev_t dev;
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u_long cmd;
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register caddr_t data;
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int flags;
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struct proc *p;
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{
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#if defined(SUN4)
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register struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)];
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register struct fbgattr *fba;
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int error;
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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 FBIOGATTR:
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fba = (struct fbgattr *)data;
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fba->real_type = sc->sc_fb.fb_type.fb_type;
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fba->owner = 0; /* XXX ??? */
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fba->fbtype = sc->sc_fb.fb_type;
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fba->sattr.flags = 0;
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fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
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fba->sattr.dev_specific[0] = -1;
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fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
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fba->emu_types[1] = -1;
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break;
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case FBIOGETCMAP:
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return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256));
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case FBIOPUTCMAP:
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/* copy to software map */
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#define p ((struct fbcmap *)data)
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error = bt_putcmap(p, &sc->sc_cmap, 256);
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if (error)
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return (error);
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/* now blast them into the chip */
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/* XXX should use retrace interrupt */
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cgeightloadcmap(sc, p->index, p->count);
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#undef p
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break;
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case FBIOGVIDEO:
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*(int *)data = cgeight_get_video(sc);
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break;
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case FBIOSVIDEO:
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cgeight_set_video(sc, *(int *)data);
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break;
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default:
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return (ENOTTY);
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}
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#endif
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return (0);
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}
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int
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cgeightpoll(dev, events, p)
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dev_t dev;
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int events;
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struct proc *p;
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{
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return (seltrue(dev, events, p));
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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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* The cg8 maps it's overlay plane at 0 for 128K, followed by the
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* enable plane for 128K, followed by the colour for as long as it
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* goes. Starting at 8MB, it maps the ramdac for NBPG, then the p4
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* register for NBPG, then the bootrom for 0x40000.
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*/
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int
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cgeightmmap(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 cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)];
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int poff;
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#define START_ENABLE (128*1024)
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#define START_COLOR ((128*1024) + (128*1024))
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#define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \
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sc->sc_fb.fb_type.fb_height * 3)
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#define END_COLOR (START_COLOR + COLOR_SIZE)
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#define START_SPECIAL 0x800000
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#define PROMSIZE 0x40000
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#define NOOVERLAY (0x04000000)
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if (off & PGOFSET)
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panic("cgeightmap");
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if ((u_int)off >= NOOVERLAY) {
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off -= NOOVERLAY;
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/*
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* X11 maps a huge chunk of the frame buffer; far more than
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* there really is. We compensate by double-mapping the
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* first page for as many other pages as it wants
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*/
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while (off >= COLOR_SIZE)
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off -= COLOR_SIZE; /* XXX thorpej ??? */
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poff = off + PFOUR_COLOR_OFF_COLOR;
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} else if ((u_int)off < START_ENABLE) {
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/*
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* in overlay plane
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*/
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poff = PFOUR_COLOR_OFF_OVERLAY + off;
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} else if ((u_int)off < START_COLOR) {
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/*
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* in enable plane
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*/
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poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE;
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} else if ((u_int)off < sc->sc_fb.fb_type.fb_size) {
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/*
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* in colour plane
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*/
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poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR;
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} else if ((u_int)off < START_SPECIAL) {
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/*
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* hole
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*/
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poff = 0; /* XXX */
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} else if ((u_int)off == START_SPECIAL) {
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/*
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* colour map (Brooktree)
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*/
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poff = PFOUR_COLOR_OFF_CMAP;
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} else if ((u_int)off == START_SPECIAL + NBPG) {
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/*
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* p4 register
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*/
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poff = 0;
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} else if ((u_int)off > (START_SPECIAL + (NBPG * 2)) &&
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(u_int) off < (START_SPECIAL + (NBPG * 2) + PROMSIZE)) {
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/*
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* rom
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*/
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poff = 0x8000 + (off - (START_SPECIAL + (NBPG * 2)));
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} else
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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 (REG2PHYS(&sc->sc_phys, poff, sc->sc_bustype) | PMAP_NC);
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}
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#if defined(SUN4)
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/*
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* Undo the effect of an FBIOSVIDEO that turns the video off.
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*/
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static void
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cgeightunblank(dev)
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struct device *dev;
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{
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cgeight_set_video((struct cgeight_softc *)dev, 1);
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}
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static int
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cgeight_get_video(sc)
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struct cgeight_softc *sc;
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{
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return (fb_pfour_get_video(&sc->sc_fb));
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}
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static void
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cgeight_set_video(sc, enable)
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struct cgeight_softc *sc;
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int enable;
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{
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fb_pfour_set_video(&sc->sc_fb, enable);
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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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cgeightloadcmap(sc, start, ncolors)
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register struct cgeight_softc *sc;
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register int start, ncolors;
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{
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register volatile struct bt_regs *bt;
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register u_int *ip;
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register 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_fbc->fbc_dac;
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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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#endif
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