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vidc20.c revision 1.14 
      1 /*	$NetBSD: vidc20.c,v 1.14 2006/03/08 23:46:23 lukem Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 Mark Brinicombe
      5  * Copyright (c) 1997 Causality Limited
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by Mark Brinicombe
     19  * 4. The name of the company nor the name of the author may be used to
     20  *    endorse or promote products derived from this software without specific
     21  *    prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     24  * OR IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     25  * WARRANTIES OF  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
     27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     33  * THE POSSIBILITY OF SUCH DAMAGE.
     34  *
     35  * RiscBSD kernel project
     36  *
     37  * vidc20.c
     38  *
     39  * VIDC20 driver
     40  *
     41  * Created      : 22/02/97
     42  */
     43 
     44 #include <sys/cdefs.h>
     45 __KERNEL_RCSID(0, "$NetBSD: vidc20.c,v 1.14 2006/03/08 23:46:23 lukem Exp $");
     46 
     47 #include <sys/types.h>
     48 #include <sys/param.h>
     49 #include <sys/systm.h>
     50 #include <sys/device.h>
     51 
     52 #include <machine/bus.h>
     53 #include <arm/iomd/vidc.h>
     54 #include <machine/io.h>
     55 #include <arm/iomd/iomdreg.h>
     56 #include <arm/iomd/iomdvar.h>
     57 #include <arm/mainbus/mainbus.h>
     58 
     59 #include "locators.h"
     60 
     61 struct vidc20_softc {
     62 	struct device	sc_dev;
     63 	bus_space_tag_t	sc_iot;
     64 };
     65 
     66 static int  vidcmatch(struct device *, struct cfdata *, void *);
     67 static void vidcattach(struct device *, struct device *, void *);
     68 static int  vidcsearch(struct device *, struct cfdata *,
     69 		       const int *, void *);
     70 
     71 /*
     72  * vidc_base gives the base of the VIDC chip in memory; this is for
     73  * the rest isnt busspaceified yet. Initialised with VIDC_BASE for
     74  * backwards compatibility.
     75  */
     76 int *vidc_base = (int *)VIDC_BASE;
     77 
     78 
     79 /*
     80  * vidc_fref is the reference frequency in MHz of the detected VIDC
     81  * (dependent on IOMD/IOC)
     82  * XXX default is RPC600 ?
     83  */
     84 int  vidc_fref = 24000000;
     85 
     86 
     87 CFATTACH_DECL(vidc, sizeof (struct vidc20_softc),
     88     vidcmatch, vidcattach, NULL, NULL);
     89 
     90 /*
     91  * vidcmatch()
     92  *
     93  * VIDC20 is a write only device so we cannot probe it
     94  * We must assume things are ok.
     95  */
     96 static int
     97 vidcmatch(struct device *parent, struct cfdata *cf, void *aux)
     98 {
     99 
    100 	return(1);
    101 }
    102 
    103 /*
    104  * vidcsearch()
    105  *
    106  * search routine used during the config of children
    107  */
    108 
    109 static int
    110 vidcsearch(struct device *parent, struct cfdata *cf,
    111 	   const int *ldesc, void *aux)
    112 {
    113 
    114 	if (config_match(parent, cf, NULL) > 0)
    115 		config_attach(parent, cf, NULL, NULL);
    116 
    117 	return (0);
    118 }
    119 
    120 /*
    121  * vidcattach()
    122  *
    123  * Configure all the child devices of the VIDC
    124  */
    125 static void
    126 vidcattach(struct device *parent, struct device *self, void *aux)
    127 {
    128 	struct vidc20_softc *sc = (struct vidc20_softc *)self;
    129 	struct mainbus_attach_args *mb = aux;
    130 
    131 	sc->sc_iot = mb->mb_iot;
    132 
    133 	/*
    134 	 * Since the VIDC is write-only, infer the type of VIDC from the
    135 	 * type of IOMD.
    136 	 */
    137 	switch (IOMD_ID) {
    138 	case ARM7500_IOC_ID:
    139 		printf(": ARM7500 video and sound macrocell\n");
    140 		vidc_fref = 32000000;
    141 		break;
    142 	case ARM7500FE_IOC_ID:
    143 		printf(": ARM7500FE video and sound macrocell\n");
    144 		vidc_fref = 32000000;
    145 		break;
    146 	default:				/* XXX default? */
    147 	case RPC600_IOMD_ID:
    148 		printf(": VIDC20\n");
    149 		vidc_fref = 24000000;
    150 		break;
    151 	};
    152 
    153 	config_search_ia(vidcsearch, self, "vidc", NULL);
    154 }
    155 
    156 /* End of vidc20.c */
    157