355 lines
10 KiB
C
355 lines
10 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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* %W% (Berkeley) %G%
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*
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* from: Header: cgthree.c,v 1.8 93/10/31 05:09:24 torek Exp
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* $Id: cgthree.c,v 1.3 1993/11/11 03:36:55 deraadt Exp $
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*/
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/*
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* color display (cgthree) 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/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 <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/btreg.h>
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#include <sparc/sbus/btvar.h>
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#include <sparc/sbus/cgthreereg.h>
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#include <sparc/sbus/sbusvar.h>
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/* per-display variables */
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struct cgthree_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 bt_regs *sc_bt; /* Brooktree registers */
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caddr_t 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 cgthreeattach(struct device *, struct device *, void *);
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struct cfdriver cgthreecd =
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{ NULL, "cgthree", matchbyname, cgthreeattach,
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DV_DULL, sizeof(struct cgthree_softc) };
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/* frame buffer generic driver */
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static void cgthreeunblank(struct device *);
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static struct fbdriver cgthreefbdriver = { cgthreeunblank };
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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 cgthree_cnputc();
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static void cgthreeloadcmap __P((struct cgthree_softc *, int, int));
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#define CGTHREE_MAJOR 55 /* 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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cgthreeattach(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 cgthree_softc *sc = (struct cgthree_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, i;
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register volatile struct bt_regs *bt;
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register struct cgthree_all *p;
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int isconsole;
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sc->sc_fb.fb_major = CGTHREE_MAJOR; /* XXX to be removed */
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sc->sc_fb.fb_driver = &cgthreefbdriver;
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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_SUN3COLOR;
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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", 1152);
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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 = 8;
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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(": %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 cgthree 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 cgthree_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_bt = bt = (volatile struct bt_regs *)
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mapiodev((caddr_t)&p->ba_btreg, sizeof(p->ba_btreg));
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sc->sc_phys = p->ba_ram;
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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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/* make sure we are not blanked (see cgthreeunblank) */
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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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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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cgthreeopen(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 >= cgthreecd.cd_ndevs || cgthreecd.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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cgthreeclose(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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cgthreeioctl(dev, cmd, data, flags, p)
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dev_t dev;
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int 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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register struct cgthree_softc *sc = cgthreecd.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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cgthreeloadcmap(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 = sc->sc_blanked;
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break;
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case FBIOSVIDEO:
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if (*(int *)data)
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cgthreeunblank(&sc->sc_dev);
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else if (!sc->sc_blanked) {
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register volatile struct bt_regs *bt;
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bt = sc->sc_bt;
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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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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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/*
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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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cgthreeunblank(dev)
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struct device *dev;
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{
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struct cgthree_softc *sc = (struct cgthree_softc *)dev;
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register volatile struct bt_regs *bt;
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if (sc->sc_blanked) {
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sc->sc_blanked = 0;
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bt = sc->sc_bt;
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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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}
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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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cgthreeloadcmap(sc, start, ncolors)
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register struct cgthree_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_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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/*
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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 cg3 is mapped starting at 256KB, for pseudo-compatibility with
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* the cg4 (which had an overlay plane in the first 128K and an enable
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* plane in the next 128K). X11 uses only 256k+ region but tries to
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* map the whole thing, so we repeatedly map the first 256K to the
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* first page of the color screen. If someone tries to use the overlay
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* and enable regions, they will get a surprise....
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*/
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int
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cgthreemap(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 cgthree_softc *sc = cgthreecd.cd_devs[minor(dev)];
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#define START (128*1024 + 128*1024)
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if (off & PGOFSET)
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panic("cgthreemap");
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if ((unsigned)off < START)
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off = 0;
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else
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off -= START;
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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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