vidc20.c revision 1.7 
1/*	$NetBSD: vidc20.c,v 1.7 2002/10/01 03:10:16 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
84CFATTACH_DECL(vidc, sizeof (struct vidc20_softc),
85    vidcmatch, vidcattach, NULL, NULL)
86
87/*
88 * vidcmatch()
89 *
90 * VIDC20 is a write only device so we cannot probe it
91 * We must assume things are ok.
92 */
93static int
94vidcmatch(struct device *parent, struct cfdata *cf, void *aux)
95{
96
97	return(1);
98}
99
100/*
101 * vidcsearch()
102 *
103 * search routine used during the config of children
104 */
105
106static int
107vidcsearch(struct device *parent, struct cfdata *cf, void *aux)
108{
109
110	if (config_match(parent, cf, NULL) > 0)
111		config_attach(parent, cf, NULL, NULL);
112
113	return (0);
114}
115
116/*
117 * vidcattach()
118 *
119 * Configure all the child devices of the VIDC
120 */
121static void
122vidcattach(struct device *parent, struct device *self, void *aux)
123{
124	struct vidc20_softc *sc = (struct vidc20_softc *)self;
125	struct mainbus_attach_args *mb = aux;
126
127	sc->sc_iot = mb->mb_iot;
128
129	/*
130	 * Since the VIDC is write-only, infer the type of VIDC from the
131	 * type of IOMD.
132	 */
133	switch (IOMD_ID) {
134	case ARM7500_IOC_ID:
135		printf(": ARM7500 video and sound macrocell\n");
136		vidc_fref = 32000000;
137		break;
138	case ARM7500FE_IOC_ID:
139		printf(": ARM7500FE video and sound macrocell\n");
140		vidc_fref = 32000000;
141		break;
142	default:				/* XXX default? */
143	case RPC600_IOMD_ID:
144		printf(": VIDC20\n");
145		vidc_fref = 24000000;
146		break;
147	};
148
149	config_search(vidcsearch, self, NULL);
150}
151
152/* End of vidc20.c */
153