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vidc20.c revision 1.4 
      1 /*	$NetBSD: vidc20.c,v 1.4 2002/06/16 13:25:02 bjh21 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 #include <sys/types.h>
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/device.h>
     49 
     50 #include <machine/bus.h>
     51 #include <arm/iomd/vidc.h>
     52 #include <machine/io.h>
     53 #include <arm/iomd/iomdreg.h>
     54 #include <arm/iomd/iomdvar.h>
     55 #include <arm/mainbus/mainbus.h>
     56 
     57 #include "locators.h"
     58 
     59 struct vidc20_softc {
     60 	struct device	sc_dev;
     61 	bus_space_tag_t	sc_iot;
     62 };
     63 
     64 static int  vidcmatch(struct device *, struct cfdata *, void *);
     65 static void vidcattach(struct device *, struct device *, void *);
     66 static int  vidcsearch(struct device *, struct cfdata *, void *);
     67 
     68 /*
     69  * vidc_base gives the base of the VIDC chip in memory; this is for
     70  * the rest isnt busspaceified yet. Initialised with VIDC_BASE for
     71  * backwards compatibility.
     72  */
     73 int *vidc_base = (int *)VIDC_BASE;
     74 
     75 
     76 /*
     77  * vidc_fref is the reference frequency in Mhz of the detected VIDC
     78  * (dependent on IOMD/IOC)
     79  * XXX default is RPC600 ?
     80  */
     81 int  vidc_fref = 24000000;
     82 
     83 
     84 struct cfattach vidc_ca = {
     85 	sizeof (struct vidc20_softc), vidcmatch, vidcattach
     86 };
     87 
     88 /*
     89  * vidcmatch()
     90  *
     91  * VIDC20 is a write only device so we cannot probe it
     92  * We must assume things are ok.
     93  */
     94 static int
     95 vidcmatch(struct device *parent, struct cfdata *cf, void *aux)
     96 {
     97 
     98 	return(1);
     99 }
    100 
    101 /*
    102  * vidcsearch()
    103  *
    104  * search routine used during the config of children
    105  */
    106 
    107 static int
    108 vidcsearch(struct device *parent, struct cfdata *cf, void *aux)
    109 {
    110 
    111 	if ((*cf->cf_attach->ca_match)(parent, cf, NULL) > 0)
    112 		config_attach(parent, cf, NULL, NULL);
    113 
    114 	return (0);
    115 }
    116 
    117 /*
    118  * vidcattach()
    119  *
    120  * Configure all the child devices of the VIDC
    121  */
    122 static void
    123 vidcattach(struct device *parent, struct device *self, void *aux)
    124 {
    125 	struct vidc20_softc *sc = (struct vidc20_softc *)self;
    126 	struct mainbus_attach_args *mb = aux;
    127 
    128 	sc->sc_iot = mb->mb_iot;
    129 
    130 	/*
    131 	 * Since the VIDC is write-only, infer the type of VIDC from the
    132 	 * type of IOMD.
    133 	 */
    134 	switch (IOMD_ID) {
    135 	case ARM7500_IOC_ID:
    136 		printf(": ARM7500 video and sound macrocell\n");
    137 		vidc_fref = 32000000;
    138 		break;
    139 	case ARM7500FE_IOC_ID:
    140 		printf(": ARM7500FE video and sound macrocell\n");
    141 		vidc_fref = 32000000;
    142 		break;
    143 	default:				/* XXX default? */
    144 	case RPC600_IOMD_ID:
    145 		printf(": VIDC20\n");
    146 		vidc_fref = 24000000;
    147 		break;
    148 	};
    149 
    150 	config_search(vidcsearch, self, NULL);
    151 }
    152 
    153 /* End of vidc20.c */
    154