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
vidcmatch(device_t parent,cfdata_t cf,void * aux)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
vidcsearch(device_t parent,cfdata_t cf,const int * ldesc,void * aux)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
vidcattach(device_t parent,device_t self,void * aux)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