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      1 /*	$NetBSD: vidc20.c,v 1.19 2021/08/07 16:18:44 thorpej 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 1.19 2021/08/07 16:18:44 thorpej 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 <sys/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 	device_t	sc_dev;
     63 	bus_space_tag_t	sc_iot;
     64 };
     65 
     66 static int  vidcmatch(device_t , cfdata_t , void *);
     67 static void vidcattach(device_t , device_t , void *);
     68 static int  vidcsearch(device_t , cfdata_t , const int *, void *);
     69 
     70 /*
     71  * vidc_base gives the base of the VIDC chip in memory; this is for
     72  * the rest isnt busspaceified yet. Initialised with VIDC_BASE for
     73  * backwards compatibility.
     74  */
     75 int *vidc_base = (int *)VIDC_BASE;
     76 
     77 
     78 /*
     79  * vidc_fref is the reference frequency in MHz of the detected VIDC
     80  * (dependent on IOMD/IOC)
     81  * XXX default is RPC600 ?
     82  */
     83 int  vidc_fref = 24000000;
     84 
     85 
     86 CFATTACH_DECL_NEW(vidc, sizeof (struct vidc20_softc),
     87     vidcmatch, vidcattach, NULL, NULL);
     88 
     89 /*
     90  * vidcmatch()
     91  *
     92  * VIDC20 is a write only device so we cannot probe it
     93  * We must assume things are ok.
     94  */
     95 static int
     96 vidcmatch(device_t parent, cfdata_t cf, void *aux)
     97 {
     98 
     99 	return 1;
    100 }
    101 
    102 /*
    103  * vidcsearch()
    104  *
    105  * search routine used during the config of children
    106  */
    107 
    108 static int
    109 vidcsearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
    110 {
    111 
    112 	if (config_probe(parent, cf, NULL))
    113 		config_attach(parent, cf, NULL, NULL, CFARGS_NONE);
    114 
    115 	return 0;
    116 }
    117 
    118 /*
    119  * vidcattach()
    120  *
    121  * Configure all the child devices of the VIDC
    122  */
    123 static void
    124 vidcattach(device_t parent, device_t self, void *aux)
    125 {
    126 	struct vidc20_softc *sc = device_private(self);
    127 	struct mainbus_attach_args *mb = aux;
    128 
    129 	sc->sc_dev = self;
    130 	sc->sc_iot = mb->mb_iot;
    131 
    132 	/*
    133 	 * Since the VIDC is write-only, infer the type of VIDC from the
    134 	 * type of IOMD.
    135 	 */
    136 	switch (IOMD_ID) {
    137 	case ARM7500_IOC_ID:
    138 		aprint_normal(": ARM7500 video and sound macrocell\n");
    139 		vidc_fref = 32000000;
    140 		break;
    141 	case ARM7500FE_IOC_ID:
    142 		aprint_normal(": ARM7500FE video and sound macrocell\n");
    143 		vidc_fref = 32000000;
    144 		break;
    145 	default:				/* XXX default? */
    146 	case RPC600_IOMD_ID:
    147 		aprint_normal(": VIDC20\n");
    148 		vidc_fref = 24000000;
    149 		break;
    150 	}
    151 
    152 	config_search(self, NULL,
    153 	    CFARGS(.search = vidcsearch));
    154 }
    155 
    156 /* End of vidc20.c */
    157