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grf_obio.c revision 1.6 
      1 /*	$NetBSD: grf_obio.c,v 1.6 1995/07/28 01:34:58 briggs 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 
     45 #include <machine/grfioctl.h>
     46 #include <machine/cpu.h>
     47 
     48 #include "nubus.h"
     49 #include "grfvar.h"
     50 
     51 extern int	grfiv_probe __P((struct grf_softc *sc, nubus_slot *ignore));
     52 extern int	grfiv_init __P((struct grf_softc *sc));
     53 extern int	grfiv_mode __P((struct grf_softc *sc, int cmd, void *arg));
     54 
     55 extern u_int32_t	mac68k_vidlog;
     56 extern u_int32_t	mac68k_vidphys;
     57 
     58 extern int
     59 grfiv_probe(sc, slotinfo)
     60 	struct grf_softc *sc;
     61 	nubus_slot *slotinfo;
     62 {
     63 	extern u_long		int_video_start;
     64 
     65 	if (int_video_start == 0 && mac68k_vidlog == 0) {
     66 		return 0;
     67 	}
     68 	if (slotinfo->slot <= 0xe) {
     69 		if (NUBUS_SLOT_TO_BASE(slotinfo->slot) > int_video_start)
     70 			return 0;
     71 		if (NUBUS_SLOT_TO_BASE(slotinfo->slot + 1) <= int_video_start)
     72 			return 0;
     73 	}
     74 	return 1;
     75 }
     76 
     77 extern int
     78 grfiv_init(sc)
     79 	struct	grf_softc *sc;
     80 {
     81 	struct grfmode *gm;
     82 	int i, j;
     83 
     84 	sc->card_id = 0;
     85 
     86 	strcpy(sc->card_name, "Internal video");
     87 
     88 	gm = &(sc->curr_mode);
     89 	gm->mode_id = 0;
     90 	gm->psize = 1;
     91 	gm->ptype = 0;
     92 	gm->width = 640;	/* XXX */
     93 	gm->height = 480;	/* XXX */
     94 	gm->rowbytes = 80;	/* XXX Hack */
     95 	gm->hres = 80;		/* XXX Hack */
     96 	gm->vres = 80;		/* XXX Hack */
     97 	gm->fbsize = gm->width * gm->height;
     98 	gm->fbbase = (caddr_t) mac68k_vidlog;
     99 	gm->fboff = 0;
    100 
    101 	return 1;
    102 }
    103 
    104 extern int
    105 grfiv_mode(sc, cmd, arg)
    106 	struct grf_softc *sc;
    107 	int cmd;
    108 	void *arg;
    109 {
    110 	switch (cmd) {
    111 	case GM_GRFON:
    112 	case GM_GRFOFF:
    113 		return 0;
    114 	case GM_CURRMODE:
    115 		break;
    116 	case GM_NEWMODE:
    117 		break;
    118 	case GM_LISTMODES:
    119 		break;
    120 	}
    121 	return EINVAL;
    122 }
    123 
    124 extern caddr_t
    125 grfiv_phys(gp, addr)
    126 	struct grf_softc *gp;
    127 	vm_offset_t addr;
    128 {
    129 	/*
    130 	 * If we're using IIsi or similar, this will be 0.
    131 	 * If we're using IIvx or similar, this will be correct.
    132 	 */
    133 	return (caddr_t) mac68k_vidphys;
    134 }
    135