xref: /src/sys/arch/mac68k/obio/grf_obio.c

/*	$NetBSD: grf_obio.c,v 1.38 1998/08/13 13:45:33 scottr Exp $	*/

/*
 * Copyright (C) 1998 Scott Reynolds
 * All rights reserved.
 *
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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) 1995 Allen Briggs.  All rights reserved.
 *
 * 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 Allen Briggs.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */
/*
 * Graphics display driver for the Macintosh internal video for machines
 * that don't map it into a fake nubus card.
 */

#include "opt_grf.h"

#include <sys/param.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/proc.h>
#include <sys/systm.h>

#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/grfioctl.h>
#include <machine/viareg.h>

#include <mac68k/nubus/nubus.h>
#include <mac68k/obio/obiovar.h>
#include <mac68k/dev/grfvar.h>

extern u_int32_t	mac68k_vidphys;
extern u_int32_t	mac68k_vidlen;
extern long		videoaddr;
extern long		videorowbytes;
extern long		videobitdepth;
extern u_long		videosize;

static int	grfiv_mode __P((struct grf_softc *gp, int cmd, void *arg));
static int	grfiv_match __P((struct device *, struct cfdata *, void *));
static void	grfiv_attach __P((struct device *, struct device *, void *));

struct cfattach intvid_ca = {
	sizeof(struct grfbus_softc), grfiv_match, grfiv_attach
};

#define	DAFB_BASE		0xf9000000
#define DAFB_CONTROL_BASE	0xf9800000
#define	CIVIC_BASE		0x50100000
#define CIVIC_CONTROL_BASE	0x50036000
#define	VALKYRIE_BASE		0xf9000000
#define VALKYRIE_CONTROL_BASE	0x50f2a000

static int
grfiv_match(parent, cf, aux)
	struct device *parent;
	struct cfdata *cf;
	void *aux;
{
	struct obio_attach_args *oa = (struct obio_attach_args *)aux;
	bus_space_handle_t bsh;
	int found;
	u_int base;

	found = 1;

	switch (current_mac_model->class) {
	case MACH_CLASSQ2:
		if (current_mac_model->machineid != MACH_MACLC575) {
			base = VALKYRIE_CONTROL_BASE;

			if (bus_space_map(oa->oa_tag, base, 0x40, 0, &bsh))
				return 0;

			/* Disable interrupts */
			bus_space_write_1(oa->oa_tag, bsh, 0x18, 0x1);
		}
		/*
		 * Note:  the only system in this class that does not have
		 * the Valkyrie chip -- at least, that we know of -- is
		 * the Performa/LC 57x series.  This system has a version
		 * of the DAFB controller, instead.
		 *
		 * If this assumption proves false, we'll have to be more
		 * intelligent here.
		 */
		/*FALLTHROUGH*/
	case MACH_CLASSQ:
		/*
		 * Assume DAFB for all of these, unless we can't
		 * access the memory.
		 */
		base = DAFB_CONTROL_BASE;

		if (bus_space_map(oa->oa_tag, base, 0x1000, 0, &bsh))
			return 0;

		if (mac68k_bus_space_probe(oa->oa_tag, bsh, 0x1c, 4) == 0) {
			bus_space_unmap(oa->oa_tag, bsh, 0x1000);
			return 0;
		}

		/* Set "Turbo SCSI" configuration to default */
		bus_space_write_4(oa->oa_tag, bsh, 0x24, 0x1d1); /* ch0 */
		bus_space_write_4(oa->oa_tag, bsh, 0x28, 0x1d1); /* ch1 */

		/* Disable interrupts */
		bus_space_write_4(oa->oa_tag, bsh, 0x104, 0);

		/* Clear any interrupts */
		bus_space_write_4(oa->oa_tag, bsh, 0x10C, 0);
		bus_space_write_4(oa->oa_tag, bsh, 0x110, 0);
		bus_space_write_4(oa->oa_tag, bsh, 0x114, 0);

		bus_space_unmap(oa->oa_tag, bsh, 0x1000);
		break;
	case MACH_CLASSAV:
		base = CIVIC_CONTROL_BASE;

		if (bus_space_map(oa->oa_tag, base, 0x1000, 0, &bsh))
			return 0;

		/* Disable interrupts */
		bus_space_write_1(oa->oa_tag, bsh, 0x120, 0);

		bus_space_unmap(oa->oa_tag, bsh, 0x1000);
		break;
	default:
		if (mac68k_vidlen == 0)
			found = 0;
		break;
	}

	return found;
}

static void
grfiv_attach(parent, self, aux)
	struct device *parent, *self;
	void   *aux;
{
	struct obio_attach_args *oa = (struct obio_attach_args *)aux;
	struct grfbus_softc *sc;
	struct grfmode *gm;
	u_long base, length;
	u_int32_t vbase1, vbase2;

	sc = (struct grfbus_softc *)self;

	sc->card_id = 0;

	switch (current_mac_model->class) {
	case MACH_CLASSQ2:
		if (current_mac_model->machineid == MACH_MACP580 ||
		    current_mac_model->machineid == MACH_MACQ630) {
			printf(": Valkyrie video subsystem\n");
			sc->sc_basepa = VALKYRIE_BASE;
			length = 0x00100000;		/* 1MB */

			if (sc->sc_basepa <= mac68k_vidphys &&
			    mac68k_vidphys < (sc->sc_basepa + length))
				sc->sc_fbofs = mac68k_vidphys - sc->sc_basepa;
			else
				sc->sc_fbofs = 0;

			printf(" @ %lx: Valkyrie video subsystem\n",
			    sc->sc_basepa + sc->sc_fbofs);
			break;
		}
		/* See note in grfiv_match() */
		/*FALLTHROUGH*/
	case MACH_CLASSQ:
		base = DAFB_CONTROL_BASE;
		sc->sc_tag = oa->oa_tag;
		if (bus_space_map(sc->sc_tag, base, 0x1000, 0, &sc->sc_regh)) {
			printf(": failed to map DAFB register space\n");
			return;
		}

		sc->sc_basepa = DAFB_BASE;
		length = 0x00100000;		/* 1MB */

		/* Compute the current frame buffer offset */
		vbase1 = bus_space_read_4(sc->sc_tag, sc->sc_regh, 0x0) & 0xfff;
		vbase2 = bus_space_read_4(sc->sc_tag, sc->sc_regh, 0x4) & 0xf;
		sc->sc_fbofs = (vbase1 << 9) | (vbase2 << 5);

#if 1
		/*
		 * XXX The following hack exists because the DAFB v7 in these
		 * systems doesn't compute fbofs correctly. (sar 19980813)
		 */
		switch (current_mac_model->machineid) {
		case MACH_MACLC475:
		case MACH_MACLC475_33:
		case MACH_MACLC575:
			sc->sc_fbofs = 0x1000;
			break;
		}
#endif

		printf(" @ %lx: DAFB video subsystem, monitor sense %x\n",
		    sc->sc_basepa + sc->sc_fbofs,
		    (bus_space_read_4(sc->sc_tag, sc->sc_regh, 0x1c) & 0x7));

		bus_space_unmap(sc->sc_tag, sc->sc_regh, 0x1000);
		break;
	case MACH_CLASSAV:
		sc->sc_basepa = CIVIC_BASE;
		length = 0x00200000;		/* 2MB */

		if (sc->sc_basepa <= mac68k_vidphys &&
		    mac68k_vidphys < (sc->sc_basepa + length))
			sc->sc_fbofs = mac68k_vidphys - sc->sc_basepa;
		else
			sc->sc_fbofs = 0;

		printf(" @ %lx: Civic video subsystem\n",
		    sc->sc_basepa + sc->sc_fbofs);
		break;
	default:
		sc->sc_basepa = m68k_trunc_page(mac68k_vidphys);
		sc->sc_fbofs = mac68k_vidphys & PGOFSET;
		length = mac68k_vidlen + sc->sc_fbofs;

		printf(" @ %lx: On-board video\n",
		    sc->sc_basepa + sc->sc_fbofs);
		break;
	}

	if (bus_space_map(sc->sc_tag, sc->sc_basepa, length, 0,
	    &sc->sc_handle)) {
		printf("%s: failed to map video RAM\n", sc->sc_dev.dv_xname);
		return;
	}

	if (sc->sc_basepa <= mac68k_vidphys &&
	    mac68k_vidphys < (sc->sc_basepa + length))
		videoaddr = sc->sc_handle + sc->sc_fbofs; /* XXX big ol' hack */

	gm = &(sc->curr_mode);
	gm->mode_id = 0;
	gm->psize = videobitdepth;
	gm->ptype = 0;
	gm->width = videosize & 0xffff;
	gm->height = (videosize >> 16) & 0xffff;
	gm->rowbytes = videorowbytes;
	gm->hres = 80;				/* XXX hack */
	gm->vres = 80;				/* XXX hack */
	gm->fbsize = gm->height * gm->rowbytes;
	gm->fbbase = (caddr_t)sc->sc_handle;	/* XXX yet another hack */
	gm->fboff = sc->sc_fbofs;

	/* Perform common video attachment. */
	grf_establish(sc, NULL, grfiv_mode);
}

static int
grfiv_mode(sc, cmd, arg)
	struct grf_softc *sc;
	int cmd;
	void *arg;
{
	switch (cmd) {
	case GM_GRFON:
	case GM_GRFOFF:
		return 0;
	case GM_CURRMODE:
		break;
	case GM_NEWMODE:
		break;
	case GM_LISTMODES:
		break;
	}
	return EINVAL;
}