vidc20.c revision 1.12 
1/*	$NetBSD: vidc20.c,v 1.12 2005/08/26 13:19:34 drochner 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 1.12 2005/08/26 13:19:34 drochner 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 <machine/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	struct device	sc_dev;
63	bus_space_tag_t	sc_iot;
64};
65
66static int  vidcmatch(struct device *, struct cfdata *, void *);
67static void vidcattach(struct device *, struct device *, void *);
68static int  vidcsearch(struct device *, struct cfdata *,
69		       const int *, void *);
70
71/*
72 * vidc_base gives the base of the VIDC chip in memory; this is for
73 * the rest isnt busspaceified yet. Initialised with VIDC_BASE for
74 * backwards compatibility.
75 */
76int *vidc_base = (int *)VIDC_BASE;
77
78
79/*
80 * vidc_fref is the reference frequency in Mhz of the detected VIDC
81 * (dependent on IOMD/IOC)
82 * XXX default is RPC600 ?
83 */
84int  vidc_fref = 24000000;
85
86
87CFATTACH_DECL(vidc, sizeof (struct vidc20_softc),
88    vidcmatch, vidcattach, NULL, NULL);
89
90/*
91 * vidcmatch()
92 *
93 * VIDC20 is a write only device so we cannot probe it
94 * We must assume things are ok.
95 */
96static int
97vidcmatch(struct device *parent, struct cfdata *cf, void *aux)
98{
99
100	return(1);
101}
102
103/*
104 * vidcsearch()
105 *
106 * search routine used during the config of children
107 */
108
109static int
110vidcsearch(struct device *parent, struct cfdata *cf,
111	   const int *ldesc, void *aux)
112{
113
114	if (config_match(parent, cf, NULL) > 0)
115		config_attach(parent, cf, NULL, NULL);
116
117	return (0);
118}
119
120/*
121 * vidcattach()
122 *
123 * Configure all the child devices of the VIDC
124 */
125static void
126vidcattach(struct device *parent, struct device *self, void *aux)
127{
128	struct vidc20_softc *sc = (struct vidc20_softc *)self;
129	struct mainbus_attach_args *mb = aux;
130
131	sc->sc_iot = mb->mb_iot;
132
133	/*
134	 * Since the VIDC is write-only, infer the type of VIDC from the
135	 * type of IOMD.
136	 */
137	switch (IOMD_ID) {
138	case ARM7500_IOC_ID:
139		printf(": ARM7500 video and sound macrocell\n");
140		vidc_fref = 32000000;
141		break;
142	case ARM7500FE_IOC_ID:
143		printf(": ARM7500FE video and sound macrocell\n");
144		vidc_fref = 32000000;
145		break;
146	default:				/* XXX default? */
147	case RPC600_IOMD_ID:
148		printf(": VIDC20\n");
149		vidc_fref = 24000000;
150		break;
151	};
152
153	config_search_ia(vidcsearch, self, "vidc", NULL);
154}
155
156/* End of vidc20.c */
157