348 lines
8.5 KiB
C
348 lines
8.5 KiB
C
/* $NetBSD: cgthree.c,v 1.2 2000/08/20 20:01:45 pk Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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/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 <machine/bus.h>
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#include <machine/autoconf.h>
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#include <dev/sun/fbio.h>
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#include <dev/sun/fbvar.h>
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#include <dev/sun/btreg.h>
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#include <dev/sun/btvar.h>
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#include <dev/sun/cgthreereg.h>
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#include <dev/sun/cgthreevar.h>
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#include <machine/conf.h>
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static void cgthreeunblank(struct device *);
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static void cgthreeloadcmap(struct cgthree_softc *, int, int);
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static void cgthree_set_video(struct cgthree_softc *, int);
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static int cgthree_get_video(struct cgthree_softc *);
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/* cdevsw prototypes */
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cdev_decl(cgthree);
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extern struct cfdriver cgthree_cd;
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/* frame buffer generic driver */
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static struct fbdriver cgthreefbdriver = {
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cgthreeunblank, cgthreeopen, cgthreeclose, cgthreeioctl, cgthreepoll,
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cgthreemmap
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};
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/* Video control parameters */
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struct cg3_videoctrl {
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unsigned char sense; /* Monitor sense value */
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unsigned char vctrl[12];
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} cg3_videoctrl[] = {
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/* Missing entries: sense 0x10, 0x30, 0x50 */
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{ 0x40, /* this happens to be my 19'' 1152x900 gray-scale monitor */
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{0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1}
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},
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{ 0x00, /* default? must be last */
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{0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1}
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}
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};
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void
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cgthreeattach(sc, name, isconsole)
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struct cgthree_softc *sc;
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char *name;
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int isconsole;
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{
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int i;
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struct fbdevice *fb = &sc->sc_fb;
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volatile struct fbcontrol *fbc = sc->sc_fbc;
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volatile struct bt_regs *bt = &fbc->fbc_dac;
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fb->fb_driver = &cgthreefbdriver;
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fb->fb_type.fb_cmsize = 256;
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fb->fb_type.fb_size = fb->fb_type.fb_height * fb->fb_linebytes;
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printf(": %s, %d x %d", name,
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fb->fb_type.fb_width, fb->fb_type.fb_height);
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/* Transfer video magic to board, if it's not running */
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if ((fbc->fbc_ctrl & FBC_TIMING) == 0) {
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int sense = (fbc->fbc_status & FBS_MSENSE);
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/* Search table for video timings fitting this monitor */
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for (i = 0; i < sizeof(cg3_videoctrl)/sizeof(cg3_videoctrl[0]);
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i++) {
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int j;
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if (sense != cg3_videoctrl[i].sense)
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continue;
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printf(" setting video ctrl");
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for (j = 0; j < 12; j++)
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fbc->fbc_vcontrol[j] =
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cg3_videoctrl[i].vctrl[j];
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fbc->fbc_ctrl |= FBC_TIMING;
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break;
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}
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}
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/* Initialize the default color map. */
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bt_initcmap(&sc->sc_cmap, 256);
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cgthreeloadcmap(sc, 0, 256);
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/* make sure we are not blanked */
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cgthree_set_video(sc, 1);
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BT_INIT(bt, 0);
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if (isconsole) {
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printf(" (console)\n");
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#ifdef RASTERCONSOLE
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fbrcons_init(fb);
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#endif
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} else
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printf("\n");
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fb_attach(fb, isconsole);
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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 >= cgthree_cd.cd_ndevs || cgthree_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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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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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 cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)];
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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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#define p ((struct fbcmap *)data)
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return (bt_getcmap(p, &sc->sc_cmap, 256, 1));
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case FBIOPUTCMAP:
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/* copy to software map */
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error = bt_putcmap(p, &sc->sc_cmap, 256, 1);
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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 = cgthree_get_video(sc);
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break;
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case FBIOSVIDEO:
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cgthree_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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return (0);
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}
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int
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cgthreepoll(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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* 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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cgthree_set_video((struct cgthree_softc *)dev, 1);
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}
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static void
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cgthree_set_video(sc, enable)
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struct cgthree_softc *sc;
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int enable;
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{
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if (enable)
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sc->sc_fbc->fbc_ctrl |= FBC_VENAB;
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else
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sc->sc_fbc->fbc_ctrl &= ~FBC_VENAB;
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}
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static int
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cgthree_get_video(sc)
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struct cgthree_softc *sc;
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{
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return ((sc->sc_fbc->fbc_ctrl & FBC_VENAB) != 0);
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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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struct cgthree_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_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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/*
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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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* As well, mapping at an offset of 0x04000000 causes the cg3 to be
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* mapped in flat mode without the cg4 emulation.
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*/
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paddr_t
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cgthreemmap(dev, off, prot)
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dev_t dev;
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off_t off;
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int prot;
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{
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struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)];
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bus_space_handle_t bh;
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#define START (128*1024 + 128*1024)
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#define NOOVERLAY (0x04000000)
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if (off & PGOFSET)
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panic("cgthreemmap");
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if (off < 0)
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return (-1);
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if ((u_int)off >= NOOVERLAY)
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off -= NOOVERLAY;
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else if ((u_int)off >= START)
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off -= START;
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else
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off = 0;
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if (off >= sc->sc_fb.fb_type.fb_size)
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return (-1);
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if (bus_space_mmap(sc->sc_bustag,
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sc->sc_btype,
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sc->sc_paddr + CG3REG_MEM + off,
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BUS_SPACE_MAP_LINEAR, &bh))
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return (-1);
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return ((paddr_t)bh);
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}
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