vidc20.c revision 1.5
1/* $NetBSD: vidc20.c,v 1.5 2002/09/27 03:17:44 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#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 59struct vidc20_softc { 60 struct device sc_dev; 61 bus_space_tag_t sc_iot; 62}; 63 64static int vidcmatch(struct device *, struct cfdata *, void *); 65static void vidcattach(struct device *, struct device *, void *); 66static 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 */ 73int *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 */ 81int vidc_fref = 24000000; 82 83 84struct 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 */ 94static int 95vidcmatch(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 107static int 108vidcsearch(struct device *parent, struct cfdata *cf, void *aux) 109{ 110 111 if (config_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 */ 122static void 123vidcattach(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