initial import of NetBSD tree

1 files changed, 404 insertions, 0 deletions

diff --git a/sys/arch/sparc/dev/cgthree.c b/sys/arch/sparc/dev/cgthree.c
new file mode 100644
index 00000000000..b3d4667c68b
--- /dev/null
+++ b/sys/arch/sparc/dev/cgthree.c
@@ -0,0 +1,404 @@
+/*	$NetBSD: cgthree.c,v 1.16 1995/10/08 01:39:18 pk Exp $ */
+
+/*
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Lawrence Berkeley Laboratory.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)cgthree.c	8.2 (Berkeley) 10/30/93
+ */
+
+/*
+ * color display (cgthree) driver.
+ *
+ * Does not handle interrupts, even though they can occur.
+ *
+ * XXX should defer colormap updates to vertical retrace interrupts
+ */
+
+#include <sys/param.h>
+#include <sys/buf.h>
+#include <sys/device.h>
+#include <sys/ioctl.h>
+#include <sys/malloc.h>
+#include <sys/mman.h>
+#include <sys/tty.h>
+
+#include <vm/vm.h>
+
+#include <machine/fbio.h>
+#include <machine/autoconf.h>
+#include <machine/pmap.h>
+#include <machine/fbvar.h>
+
+#include <sparc/dev/btreg.h>
+#include <sparc/dev/btvar.h>
+#include <sparc/dev/cgthreereg.h>
+#include <sparc/dev/sbusvar.h>
+
+/* per-display variables */
+struct cgthree_softc {
+	struct	device sc_dev;		/* base device */
+	struct	sbusdev sc_sd;		/* sbus device */
+	struct	fbdevice sc_fb;		/* frame buffer device */
+	volatile struct bt_regs *sc_bt;	/* Brooktree registers */
+	caddr_t	sc_phys;		/* display RAM (phys addr) */
+	int	sc_blanked;		/* true if blanked */
+	union	bt_cmap sc_cmap;	/* Brooktree color map */
+};
+
+/* autoconfiguration driver */
+static void	cgthreeattach(struct device *, struct device *, void *);
+static int	cgthreematch(struct device *, void *, void *);
+int		cgthreeopen __P((dev_t, int, int, struct proc *));
+int		cgthreeclose __P((dev_t, int, int, struct proc *));
+int		cgthreeioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
+int		cgthreemmap __P((dev_t, int, int));
+static void	cgthreeunblank(struct device *);
+
+struct cfdriver cgthreecd = {
+	NULL, "cgthree", cgthreematch, cgthreeattach,
+	DV_DULL, sizeof(struct cgthree_softc)
+};
+
+/* frame buffer generic driver */
+static struct fbdriver cgthreefbdriver = {
+	cgthreeunblank, cgthreeopen, cgthreeclose, cgthreeioctl, cgthreemmap
+};
+
+extern int fbnode;
+extern struct tty *fbconstty;
+extern int (*v_putc)();
+extern int nullop();
+static int cgthree_cnputc();
+
+static void cgthreeloadcmap __P((struct cgthree_softc *, int, int));
+
+/*
+ * Match a cgthree.
+ */
+int
+cgthreematch(parent, vcf, aux)
+	struct device *parent;
+	void *vcf, *aux;
+{
+	struct cfdata *cf = vcf;
+	struct confargs *ca = aux;
+	struct romaux *ra = &ca->ca_ra;
+
+	if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
+		return (0);
+	if (ca->ca_bustype == BUS_SBUS)
+		return(1);
+	ra->ra_len = NBPG;
+	return (probeget(ra->ra_vaddr, 4) != -1);
+}
+
+/*
+ * Attach a display.  We need to notice if it is the console, too.
+ */
+void
+cgthreeattach(parent, self, args)
+	struct device *parent, *self;
+	void *args;
+{
+	register struct cgthree_softc *sc = (struct cgthree_softc *)self;
+	register struct confargs *ca = args;
+	register int node, ramsize, i;
+	register volatile struct bt_regs *bt;
+	register struct cgthree_all *p;
+	int isconsole;
+	int sbus = 1;
+	char *nam;
+
+	sc->sc_fb.fb_driver = &cgthreefbdriver;
+	sc->sc_fb.fb_device = &sc->sc_dev;
+	/*
+	 * The defaults below match my screen, but are not guaranteed
+	 * to be correct as defaults go...
+	 */
+	sc->sc_fb.fb_type.fb_type = FBTYPE_SUN3COLOR;
+	switch (ca->ca_bustype) {
+	case BUS_OBIO:
+	case BUS_VME32:
+	case BUS_VME16:
+		sbus = node = 0;
+		nam = "cgthree";
+		break;
+
+	case BUS_SBUS:
+		node = ca->ca_ra.ra_node;
+		nam = getpropstring(node, "model");
+		break;
+	}
+
+	sc->sc_fb.fb_type.fb_depth = 8;
+	fb_setsize(&sc->sc_fb, sc->sc_fb.fb_type.fb_depth,
+	    1152, 900, node, ca->ca_bustype);
+
+	ramsize = roundup(sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes,
+		NBPG);
+	sc->sc_fb.fb_type.fb_cmsize = 256;
+	sc->sc_fb.fb_type.fb_size = ramsize;
+	printf(": %s, %d x %d", nam,
+	    sc->sc_fb.fb_type.fb_width, sc->sc_fb.fb_type.fb_height);
+
+	/*
+	 * When the ROM has mapped in a cgthree display, the address
+	 * maps only the video RAM, so in any case we have to map the
+	 * registers ourselves.  We only need the video RAM if we are
+	 * going to print characters via rconsole.
+	 */
+	isconsole = node == fbnode && fbconstty != NULL;
+	p = (struct cgthree_all *)ca->ca_ra.ra_paddr;
+	if ((sc->sc_fb.fb_pixels = ca->ca_ra.ra_vaddr) == NULL && isconsole) {
+		/* this probably cannot happen, but what the heck */
+		sc->sc_fb.fb_pixels = mapiodev(p->ba_ram, ramsize, ca->ca_bustype);
+	}
+	sc->sc_bt = bt = (volatile struct bt_regs *)
+	    mapiodev((caddr_t)&p->ba_btreg, sizeof(p->ba_btreg), ca->ca_bustype);
+	sc->sc_phys = p->ba_ram;
+
+	/* grab initial (current) color map */
+	bt->bt_addr = 0;
+	for (i = 0; i < 256 * 3 / 4; i++)
+		sc->sc_cmap.cm_chip[i] = bt->bt_cmap;
+	/* make sure we are not blanked (see cgthreeunblank) */
+	bt->bt_addr = 0x06;		/* command reg */
+	bt->bt_ctrl = 0x73;		/* overlay plane */
+	bt->bt_addr = 0x04;		/* read mask */
+	bt->bt_ctrl = 0xff;		/* color planes */
+
+	if (isconsole) {
+		printf(" (console)\n");
+#ifdef RASTERCONSOLE
+		fbrcons_init(&sc->sc_fb);
+#endif
+	} else
+		printf("\n");
+	if (sbus)
+		sbus_establish(&sc->sc_sd, &sc->sc_dev);
+	if (node == fbnode)
+		fb_attach(&sc->sc_fb);
+}
+
+int
+cgthreeopen(dev, flags, mode, p)
+	dev_t dev;
+	int flags, mode;
+	struct proc *p;
+{
+	int unit = minor(dev);
+
+	if (unit >= cgthreecd.cd_ndevs || cgthreecd.cd_devs[unit] == NULL)
+		return (ENXIO);
+	return (0);
+}
+
+int
+cgthreeclose(dev, flags, mode, p)
+	dev_t dev;
+	int flags, mode;
+	struct proc *p;
+{
+
+	return (0);
+}
+
+int
+cgthreeioctl(dev, cmd, data, flags, p)
+	dev_t dev;
+	u_long cmd;
+	register caddr_t data;
+	int flags;
+	struct proc *p;
+{
+	register struct cgthree_softc *sc = cgthreecd.cd_devs[minor(dev)];
+	register struct fbgattr *fba;
+	int error;
+
+	switch (cmd) {
+
+	case FBIOGTYPE:
+		*(struct fbtype *)data = sc->sc_fb.fb_type;
+		break;
+
+	case FBIOGATTR:
+		fba = (struct fbgattr *)data;
+		fba->real_type = sc->sc_fb.fb_type.fb_type;
+		fba->owner = 0;		/* XXX ??? */
+		fba->fbtype = sc->sc_fb.fb_type;
+		fba->sattr.flags = 0;
+		fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
+		fba->sattr.dev_specific[0] = -1;
+		fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
+		fba->emu_types[1] = -1;
+		break;
+
+	case FBIOGETCMAP:
+		return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256));
+
+	case FBIOPUTCMAP:
+		/* copy to software map */
+#define p ((struct fbcmap *)data)
+		error = bt_putcmap(p, &sc->sc_cmap, 256);
+		if (error)
+			return (error);
+		/* now blast them into the chip */
+		/* XXX should use retrace interrupt */
+		cgthreeloadcmap(sc, p->index, p->count);
+#undef p
+		break;
+
+	case FBIOGVIDEO:
+		*(int *)data = sc->sc_blanked;
+		break;
+
+	case FBIOSVIDEO:
+		if (*(int *)data)
+			cgthreeunblank(&sc->sc_dev);
+		else if (!sc->sc_blanked) {
+			register volatile struct bt_regs *bt;
+
+			bt = sc->sc_bt;
+			bt->bt_addr = 0x06;	/* command reg */
+			bt->bt_ctrl = 0x70;	/* overlay plane */
+			bt->bt_addr = 0x04;	/* read mask */
+			bt->bt_ctrl = 0x00;	/* color planes */
+			/*
+			 * Set color 0 to black -- note that this overwrites
+			 * R of color 1.
+			 */
+			bt->bt_addr = 0;
+			bt->bt_cmap = 0;
+
+			sc->sc_blanked = 1;
+		}
+		break;
+
+	default:
+		return (ENOTTY);
+	}
+	return (0);
+}
+
+/*
+ * Undo the effect of an FBIOSVIDEO that turns the video off.
+ */
+static void
+cgthreeunblank(dev)
+	struct device *dev;
+{
+	struct cgthree_softc *sc = (struct cgthree_softc *)dev;
+	register volatile struct bt_regs *bt;
+
+	if (sc->sc_blanked) {
+		sc->sc_blanked = 0;
+		bt = sc->sc_bt;
+		/* restore color 0 (and R of color 1) */
+		bt->bt_addr = 0;
+		bt->bt_cmap = sc->sc_cmap.cm_chip[0];
+
+		/* restore read mask */
+		bt->bt_addr = 0x06;	/* command reg */
+		bt->bt_ctrl = 0x73;	/* overlay plane */
+		bt->bt_addr = 0x04;	/* read mask */
+		bt->bt_ctrl = 0xff;	/* color planes */
+	}
+}
+
+/*
+ * Load a subset of the current (new) colormap into the Brooktree DAC.
+ */
+static void
+cgthreeloadcmap(sc, start, ncolors)
+	register struct cgthree_softc *sc;
+	register int start, ncolors;
+{
+	register volatile struct bt_regs *bt;
+	register u_int *ip;
+	register int count;
+
+	ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)];	/* start/4 * 3 */
+	count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
+	bt = sc->sc_bt;
+	bt->bt_addr = BT_D4M4(start);
+	while (--count >= 0)
+		bt->bt_cmap = *ip++;
+}
+
+/*
+ * Return the address that would map the given device at the given
+ * offset, allowing for the given protection, or return -1 for error.
+ *
+ * The cg3 is mapped starting at 256KB, for pseudo-compatibility with
+ * the cg4 (which had an overlay plane in the first 128K and an enable
+ * plane in the next 128K).  X11 uses only 256k+ region but tries to
+ * map the whole thing, so we repeatedly map the first 256K to the
+ * first page of the color screen.  If someone tries to use the overlay
+ * and enable regions, they will get a surprise....
+ * 
+ * As well, mapping at an offset of 0x04000000 causes the cg3 to be
+ * mapped in flat mode without the cg4 emulation.
+ */
+int
+cgthreemmap(dev, off, prot)
+	dev_t dev;
+	int off, prot;
+{
+	register struct cgthree_softc *sc = cgthreecd.cd_devs[minor(dev)];
+#define START		(128*1024 + 128*1024)
+#define NOOVERLAY	(0x04000000)
+
+	if (off & PGOFSET)
+		panic("cgthreemmap");
+	if ((u_int)off >= NOOVERLAY)
+		off -= NOOVERLAY;
+	else if ((u_int)off >= START)
+		off -= START;
+	else
+		off = 0;
+	if ((unsigned)off >= sc->sc_fb.fb_type.fb_size)
+		return (-1);
+	/*
+	 * I turned on PMAP_NC here to disable the cache as I was
+	 * getting horribly broken behaviour with it on.
+	 */
+	return ((int)sc->sc_phys + off + PMAP_OBIO + PMAP_NC);
+}