1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2020 Oleksandr Tymoshenko <gonzo@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/bus.h>
31 #include <sys/kernel.h>
32 #include <sys/lock.h>
33 #include <sys/module.h>
34 #include <sys/mutex.h>
35 #include <sys/rman.h>
36 #include <sys/resource.h>
37 #include <machine/bus.h>
38
39 #include <dev/ofw/ofw_bus.h>
40 #include <dev/ofw/ofw_bus_subr.h>
41
42 #include "opt_snd.h"
43 #include <dev/sound/pcm/sound.h>
44 #include <dev/sound/fdt/audio_dai.h>
45 #include "audio_dai_if.h"
46
47 static struct ofw_compat_data compat_data[] = {
48 { "dummy-codec", 1},
49 { NULL, 0 }
50 };
51
52 struct dummy_codec_softc {
53 device_t dev;
54 };
55
56 static int dummy_codec_probe(device_t dev);
57 static int dummy_codec_attach(device_t dev);
58 static int dummy_codec_detach(device_t dev);
59
60 static int
dummy_codec_probe(device_t dev)61 dummy_codec_probe(device_t dev)
62 {
63 if (!ofw_bus_status_okay(dev))
64 return (ENXIO);
65
66 if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
67 return (ENXIO);
68
69 device_set_desc(dev, "Dummy Codec");
70 return (BUS_PROBE_DEFAULT);
71 }
72
73 static int
dummy_codec_attach(device_t dev)74 dummy_codec_attach(device_t dev)
75 {
76 struct dummy_codec_softc *sc;
77 phandle_t node;
78
79 sc = device_get_softc(dev);
80 sc->dev = dev;
81
82 node = ofw_bus_get_node(dev);
83 OF_device_register_xref(OF_xref_from_node(node), dev);
84
85 return (0);
86 }
87
88 static int
dummy_codec_detach(device_t dev)89 dummy_codec_detach(device_t dev)
90 {
91
92 return (0);
93 }
94
95 static int
dummy_codec_dai_init(device_t dev,uint32_t format)96 dummy_codec_dai_init(device_t dev, uint32_t format)
97 {
98
99 return (0);
100 }
101
102 static device_method_t dummy_codec_methods[] = {
103 /* Device interface */
104 DEVMETHOD(device_probe, dummy_codec_probe),
105 DEVMETHOD(device_attach, dummy_codec_attach),
106 DEVMETHOD(device_detach, dummy_codec_detach),
107
108 DEVMETHOD(audio_dai_init, dummy_codec_dai_init),
109
110 DEVMETHOD_END
111 };
112
113 static driver_t dummy_codec_driver = {
114 "dummycodec",
115 dummy_codec_methods,
116 sizeof(struct dummy_codec_softc),
117 };
118
119 DRIVER_MODULE(dummy_codec, simplebus, dummy_codec_driver, 0, 0);
120 SIMPLEBUS_PNP_INFO(compat_data);
121