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grf_obio.c revision 1.16 
      1 /*	$NetBSD: grf_obio.c,v 1.16 1996/12/16 16:17:06 scottr Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Allen Briggs.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Allen Briggs.
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 /*
     32  * Graphics display driver for the Macintosh internal video for machines
     33  * that don't map it into a fake nubus card.
     34  */
     35 
     36 #include <sys/param.h>
     37 
     38 #include <sys/device.h>
     39 #include <sys/ioctl.h>
     40 #include <sys/file.h>
     41 #include <sys/malloc.h>
     42 #include <sys/mman.h>
     43 #include <sys/proc.h>
     44 #include <sys/systm.h>
     45 
     46 #include <machine/grfioctl.h>
     47 #include <machine/cpu.h>
     48 
     49 #include "nubus.h"
     50 #include "grfvar.h"
     51 
     52 extern u_int32_t	mac68k_vidlog;
     53 extern u_int32_t	mac68k_vidphys;
     54 extern long		videorowbytes;
     55 extern long		videobitdepth;
     56 extern unsigned long	videosize;
     57 
     58 static int	grfiv_mode __P((struct grf_softc *gp, int cmd, void *arg));
     59 static caddr_t	grfiv_phys __P((struct grf_softc *gp, vm_offset_t addr));
     60 static int	grfiv_match __P((struct device *, struct cfdata *, void *));
     61 static void	grfiv_attach __P((struct device *, struct device *, void *));
     62 
     63 struct cfdriver intvid_cd = {
     64 	NULL, "intvid", DV_DULL
     65 };
     66 
     67 struct cfattach intvid_ca = {
     68 	sizeof(struct grfbus_softc), grfiv_match, grfiv_attach
     69 };
     70 
     71 static int
     72 grfiv_match(parent, cf, aux)
     73 	struct device *parent;
     74 	struct cfdata *cf;
     75 	void *aux;
     76 {
     77 	static int	internal_video_found = 0;
     78 
     79 	if (internal_video_found || (mac68k_vidlog == 0)) {
     80 		return 0;
     81 	}
     82 
     83 	return 1;
     84 }
     85 
     86 static void
     87 grfiv_attach(parent, self, aux)
     88 	struct device *parent, *self;
     89 	void   *aux;
     90 {
     91 	struct grfbus_softc	*sc;
     92 	struct grfmode		*gm;
     93 
     94 	sc = (struct grfbus_softc *) self;
     95 
     96 	sc->card_id = 0;
     97 
     98 	printf(": Internal Video\n");
     99 
    100 	gm = &(sc->curr_mode);
    101 	gm->mode_id = 0;
    102 	gm->psize = videobitdepth;
    103 	gm->ptype = 0;
    104 	gm->width = videosize & 0xffff;
    105 	gm->height = (videosize >> 16) & 0xffff;
    106 	gm->rowbytes = videorowbytes;
    107 	gm->hres = 80;		/* XXX Hack */
    108 	gm->vres = 80;		/* XXX Hack */
    109 	gm->fbsize = gm->rowbytes * gm->height;
    110 	gm->fbbase = (caddr_t) mac68k_vidlog;
    111 	gm->fboff = 0;
    112 
    113 	/* Perform common video attachment. */
    114 	grf_establish(sc, NULL, grfiv_mode, grfiv_phys);
    115 }
    116 
    117 static int
    118 grfiv_mode(sc, cmd, arg)
    119 	struct grf_softc *sc;
    120 	int cmd;
    121 	void *arg;
    122 {
    123 	switch (cmd) {
    124 	case GM_GRFON:
    125 	case GM_GRFOFF:
    126 		return 0;
    127 	case GM_CURRMODE:
    128 		break;
    129 	case GM_NEWMODE:
    130 		break;
    131 	case GM_LISTMODES:
    132 		break;
    133 	}
    134 	return EINVAL;
    135 }
    136 
    137 static caddr_t
    138 grfiv_phys(gp, addr)
    139 	struct grf_softc *gp;
    140 	vm_offset_t addr;
    141 {
    142 	/*
    143 	 * If we're using IIsi or similar, this will be 0.
    144 	 * If we're using IIvx or similar, this will be correct.
    145 	 */
    146 	return (caddr_t) mac68k_vidphys;
    147 }
    148