1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD$ 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/kernel.h> 37 #include <sys/lock.h> 38 #include <sys/module.h> 39 #include <sys/mutex.h> 40 #include <sys/rman.h> 41 #include <sys/resource.h> 42 #include <machine/bus.h> 43 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/ofw_bus_subr.h> 46 47 #include "opt_snd.h" 48 #include <dev/sound/pcm/sound.h> 49 #include <dev/sound/fdt/audio_dai.h> 50 #include "audio_dai_if.h" 51 52 static struct ofw_compat_data compat_data[] = { 53 { "dummy-codec", 1}, 54 { NULL, 0 } 55 }; 56 57 struct dummy_codec_softc { 58 device_t dev; 59 }; 60 61 static int dummy_codec_probe(device_t dev); 62 static int dummy_codec_attach(device_t dev); 63 static int dummy_codec_detach(device_t dev); 64 65 static int 66 dummy_codec_probe(device_t dev) 67 { 68 if (!ofw_bus_status_okay(dev)) 69 return (ENXIO); 70 71 if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data) 72 return (ENXIO); 73 74 device_set_desc(dev, "Dummy Codec"); 75 return (BUS_PROBE_DEFAULT); 76 } 77 78 static int 79 dummy_codec_attach(device_t dev) 80 { 81 struct dummy_codec_softc *sc; 82 phandle_t node; 83 84 sc = device_get_softc(dev); 85 sc->dev = dev; 86 87 node = ofw_bus_get_node(dev); 88 OF_device_register_xref(OF_xref_from_node(node), dev); 89 90 return (0); 91 } 92 93 static int 94 dummy_codec_detach(device_t dev) 95 { 96 97 return (0); 98 } 99 100 static int 101 dummy_codec_dai_init(device_t dev, uint32_t format) 102 { 103 104 return (0); 105 } 106 107 static device_method_t dummy_codec_methods[] = { 108 /* Device interface */ 109 DEVMETHOD(device_probe, dummy_codec_probe), 110 DEVMETHOD(device_attach, dummy_codec_attach), 111 DEVMETHOD(device_detach, dummy_codec_detach), 112 113 DEVMETHOD(audio_dai_init, dummy_codec_dai_init), 114 115 DEVMETHOD_END 116 }; 117 118 static driver_t dummy_codec_driver = { 119 "dummycodec", 120 dummy_codec_methods, 121 sizeof(struct dummy_codec_softc), 122 }; 123 124 static devclass_t dummy_codec_devclass; 125 126 DRIVER_MODULE(dummy_codec, simplebus, dummy_codec_driver, dummy_codec_devclass, 0, 0); 127 SIMPLEBUS_PNP_INFO(compat_data); 128