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 61struct vidc20_softc { 62 device_t sc_dev; 63 bus_space_tag_t sc_iot; 64}; 65 66static int vidcmatch(device_t , cfdata_t , void *); 67static void vidcattach(device_t , device_t , void *); 68static 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 */ 75int *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 */ 83int vidc_fref = 24000000; 84 85 86CFATTACH_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 */ 95static int 96vidcmatch(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 108static int 109vidcsearch(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 */ 123static void 124vidcattach(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