xref: /src/sys/arch/mac68k/nubus/grf_nubus.c

/*	$NetBSD: grf_nubus.c,v 1.5 1995/07/02 00:30:29 briggs Exp $	*/

/*
 * 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.
 */
/*
 * Device-specific routines for handling Nubus-based video cards.
 */

#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 <machine/grfioctl.h>
#include <machine/cpu.h>

#include "nubus.h"
#include "grfvar.h"

extern int	grfmv_probe __P((struct grf_softc *gp, nubus_slot *slot));
extern int	grfmv_init __P((struct grf_softc *gp));
extern int	grfmv_mode __P((struct grf_softc *gp, int cmd, void *arg));

static char zero = 0;

static void
load_image_data(data, image)
	caddr_t	data;
	struct	image_data *image;
{
	bcopy(data     , &image->size,       4);
	bcopy(data +  4, &image->offset,     4);
	bcopy(data +  8, &image->rowbytes,   2);
	bcopy(data + 10, &image->top,        2);
	bcopy(data + 12, &image->left,       2);
	bcopy(data + 14, &image->bottom,     2);
	bcopy(data + 16, &image->right,      2);
	bcopy(data + 18, &image->version,    2);
	bcopy(data + 20, &image->packType,   2);
	bcopy(data + 22, &image->packSize,   4);
	bcopy(data + 26, &image->hRes,       4);
	bcopy(data + 30, &image->vRes,       4);
	bcopy(data + 34, &image->pixelType,  2);
	bcopy(data + 36, &image->pixelSize,  2);
	bcopy(data + 38, &image->cmpCount,   2);
	bcopy(data + 40, &image->cmpSize,    2);
	bcopy(data + 42, &image->planeBytes, 4);
}

static void
grfmv_intr(sc, slot)
	struct	grf_softc *sc;
	int	slot;
{
	struct grf_softc *gp;
	caddr_t		 slotbase;

	slotbase = (caddr_t) NUBUS_SLOT_TO_BASE(slot);
	slotbase[0xa0000] = zero;
}

extern int
grfmv_probe(sc, slot)
	struct	grf_softc *sc;
	nubus_slot	*slot;
{
	nubus_dir	dir, *dirp, dir2, *dirp2;
	nubus_dirent	dirent, *direntp;
	nubus_type	slottype;

	dirp = &dir;
	direntp = &dirent;
	nubus_get_main_dir(slot, dirp);

	/*
	 * Unfortunately, I think we'll have to load this value from
	 * the macos.  The alternative is putting in enough hooks to
	 * be able to call the card's PrimaryInit routine which could
	 * call just about any part of the ROM, I think.
	 */
	if (nubus_find_rsrc(slot, dirp, 128, direntp) <= 0) {
		if (nubus_find_rsrc(slot, dirp, 129, direntp) <= 0) {
			return 0;
		}
	}

	dirp2 = (nubus_dir *) &sc->board_dir;
	nubus_get_dir_from_rsrc(slot, direntp, dirp2);

	if (nubus_find_rsrc(slot, dirp2, NUBUS_RSRC_TYPE, direntp) <= 0)
		/* Type is a required entry...  This should never happen. */
		return 0;

	if (nubus_get_ind_data(slot, direntp,
			(caddr_t) &slottype, sizeof(nubus_type)) <= 0)
		return 0;

	if (slottype.category != NUBUS_CATEGORY_DISPLAY)
		return 0;

	if (slottype.type != NUBUS_TYPE_VIDEO)
		return 0;

	if (slottype.drsw != NUBUS_DRSW_APPLE)
		return 0;

	/*
	 * If we've gotten this far, then we're dealing with a real-live
	 * Apple QuickDraw-compatible display card resource.  Now, how to
	 * determine that this is an active resource???  Dunno.  But we'll
	 * proceed like it is.
	 */

	sc->card_id = slottype.drhw;

	/* Need to load display info (and driver?), etc... */

	return 1;
}

extern int
grfmv_init(sc)
	struct grf_softc *sc;
{
	struct image_data image_store, image;
	nubus_dirent	dirent;
	nubus_dir	mode_dir;
	int		mode;
	u_long		base;

	mode = NUBUS_RSRC_FIRSTMODE;
	if (nubus_find_rsrc(&sc->sc_slot, &sc->board_dir, mode, &dirent) <= 0)
		return 0;

	nubus_get_dir_from_rsrc(&sc->sc_slot, &dirent, &mode_dir);

	if (nubus_find_rsrc(&sc->sc_slot, &mode_dir, VID_PARAMS, &dirent) <= 0)
		return 0;

	if (nubus_get_ind_data(&sc->sc_slot, &dirent, (caddr_t) &image_store,
				sizeof(struct image_data)) <= 0)
		return 0;

	load_image_data((caddr_t) &image_store, &image);

	base = NUBUS_SLOT_TO_BASE(sc->sc_slot.slot);

	sc->curr_mode.mode_id = mode;
	sc->curr_mode.fbbase = (caddr_t) (base + image.offset);
	sc->curr_mode.fboff = image.offset;
	sc->curr_mode.rowbytes = image.rowbytes;
	sc->curr_mode.width = image.right - image.left;
	sc->curr_mode.height = image.bottom - image.top;
	sc->curr_mode.fbsize = sc->curr_mode.height * sc->curr_mode.rowbytes;
	sc->curr_mode.hres = image.hRes;
	sc->curr_mode.vres = image.vRes;
	sc->curr_mode.ptype = image.pixelType;
	sc->curr_mode.psize = image.pixelSize;

	strncpy(sc->card_name, nubus_get_card_name(&sc->sc_slot),
		CARD_NAME_LEN);

	sc->card_name[CARD_NAME_LEN-1] = '\0';

	add_nubus_intr(sc->sc_slot.slot, grfmv_intr, sc);

	return 1;
}

extern int
grfmv_mode(gp, cmd, arg)
	struct grf_softc *gp;
	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;
}