xref: /src/sys/arch/sun2/dev/bwtwo_any.c

/*	$NetBSD: bwtwo_any.c,v 1.18 2023/12/20 05:13:35 thorpej Exp $ */

/*-
 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe and Matthew Fredette.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * 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. 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.
 *
 *	@(#)bwtwo.c	8.1 (Berkeley) 6/11/93
 */

/*
 * black&white display (bwtwo) driver.
 *
 * Does not handle interrupts, even though they can occur.
 *
 * P4 and overlay plane support by Jason R. Thorpe <thorpej (at) NetBSD.org>.
 * Overlay plane handling hints and ideas provided by Brad Spencer.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bwtwo_any.c,v 1.18 2023/12/20 05:13:35 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/tty.h>
#include <sys/conf.h>

#include <machine/autoconf.h>
#include <sun2/sun2/control.h>

#include <dev/sun/fbio.h>
#include <dev/sun/fbvar.h>
#include <dev/sun/btreg.h>
#include <sun2/dev/bwtworeg.h>
#include <dev/sun/bwtwovar.h>

/* autoconfiguration driver */
static int	bwtwomatch_any(device_t, cfdata_t, void *);
static void	bwtwoattach_any(device_t, device_t, void *);

struct bwtwosun2_softc {
	struct bwtwo_softc sc;
	bus_space_handle_t bh;
};

CFATTACH_DECL_NEW(bwtwo_obio, sizeof(struct bwtwosun2_softc),
    bwtwomatch_any, bwtwoattach_any, NULL, NULL);

CFATTACH_DECL_NEW(bwtwo_obmem, sizeof(struct bwtwosun2_softc),
    bwtwomatch_any, bwtwoattach_any, NULL, NULL);

static int	bwtwo_get_video_sun2(struct bwtwo_softc *);
static void	bwtwo_set_video_sun2(struct bwtwo_softc *, int);

extern int fbnode;

static int
bwtwomatch_any(device_t parent, cfdata_t cf, void *aux)
{
	struct mainbus_attach_args *ma = aux;
	bus_space_handle_t bh;
	int matched;

	/* Make sure there is something there... */
	if (bus_space_map(ma->ma_bustag, ma->ma_paddr + BWREG_REG,
			  sizeof(struct bwtworeg), 0, &bh))
		return (0);
	matched = (bus_space_peek_1(ma->ma_bustag, bh, 0, NULL) == 0);
	bus_space_unmap(ma->ma_bustag, bh, sizeof(struct bwtworeg));
	return (matched);
}

static void
bwtwoattach_any(device_t parent, device_t self, void *aux)
{
	struct bwtwosun2_softc *scsun2 = device_private(self);
	struct bwtwo_softc *sc = &scsun2->sc;
	struct mainbus_attach_args *ma = aux;
	struct fbdevice *fb = &sc->sc_fb;
	bus_space_handle_t bh;
	int isconsole;
	const char *name;

	sc->sc_dev = self;

	/* Remember cookies for bwtwo_mmap() */
	sc->sc_bustag = ma->ma_bustag;
	sc->sc_paddr = ma->ma_paddr;

	fb->fb_flags = device_cfdata(self)->cf_flags;
	fb->fb_type.fb_depth = 1;
	fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900);

	isconsole = fb_is_console(0);

	/* A plain bwtwo */
	sc->sc_reg = NULL;
	fb->fb_pfour = NULL;
	name = "bwtwo";
	sc->sc_pixeloffset = BWREG_MEM;
	sc->sc_get_video = bwtwo_get_video_sun2;
	sc->sc_set_video = bwtwo_set_video_sun2;

	/* Map the registers. */
	if (bus_space_map(ma->ma_bustag, ma->ma_paddr + BWREG_REG,
			  sizeof(struct bwtworeg), 0, &scsun2->bh)) {
		printf("%s: cannot map regs\n", device_xname(self));
		return;
	}

	if (isconsole) {
		int ramsize = fb->fb_type.fb_height * fb->fb_linebytes;
		if (bus_space_map(ma->ma_bustag,
				  ma->ma_paddr + sc->sc_pixeloffset,
				  ramsize,
				  BUS_SPACE_MAP_LINEAR, &bh) != 0) {
			printf("%s: cannot map pixels\n", device_xname(self));
			return;
		}
		sc->sc_fb.fb_pixels = (char *)bh;
	}

	bwtwoattach(sc, name, isconsole);
}

static void
bwtwo_set_video_sun2(struct bwtwo_softc *sc, int enable)
{
	struct bwtwosun2_softc *scsun2 = (struct bwtwosun2_softc *)sc;
	unsigned char cr;

	cr = bus_space_read_1(sc->sc_bustag, scsun2->bh, 0);
	bus_space_write_1(sc->sc_bustag, scsun2->bh, 0,
			  (enable ?
			   (cr | BW2_CR_ENABLE_VIDEO) :
			   (cr & ~BW2_CR_ENABLE_VIDEO)));
	return;
}

static int
bwtwo_get_video_sun2(struct bwtwo_softc *sc)
{
	struct bwtwosun2_softc *scsun2 = (struct bwtwosun2_softc *)sc;

	return ((bus_space_read_1(sc->sc_bustag, scsun2->bh, 0) &
		 BW2_CR_ENABLE_VIDEO) != 0);
}