FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/fdt/dummy_codec.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2020 Oleksandr Tymoshenko <gonzo@FreeBSD.org>
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/lock.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/rman.h>
    #include <sys/resource.h>
    #include <machine/bus.h>
    
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include "opt_snd.h"
    #include <dev/sound/pcm/sound.h>
    #include <dev/sound/fdt/audio_dai.h>
    #include "audio_dai_if.h"
    
    static struct ofw_compat_data compat_data[] = {
            { "dummy-codec",        1},
            { NULL,                 0 }
    };
    
    struct dummy_codec_softc {
            device_t        dev;
    };
    
    static int dummy_codec_probe(device_t dev);
    static int dummy_codec_attach(device_t dev);
    static int dummy_codec_detach(device_t dev);
    
    static int
    dummy_codec_probe(device_t dev)
    {
            if (!ofw_bus_status_okay(dev))
                    return (ENXIO);
    
            if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
                    return (ENXIO);
    
            device_set_desc(dev, "Dummy Codec");
            return (BUS_PROBE_DEFAULT);
    }
    
    static int
    dummy_codec_attach(device_t dev)
    {
            struct dummy_codec_softc *sc;
            phandle_t node;
    
            sc = device_get_softc(dev);
            sc->dev = dev;
    
            node = ofw_bus_get_node(dev);
            OF_device_register_xref(OF_xref_from_node(node), dev);
    
            return (0);
    }
    
    static int
    dummy_codec_detach(device_t dev)
    {
    
            return (0);
    }
    
   static int
   dummy_codec_dai_init(device_t dev, uint32_t format)
   {
   
           return (0);
   }
   
   static device_method_t dummy_codec_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe,         dummy_codec_probe),
           DEVMETHOD(device_attach,        dummy_codec_attach),
           DEVMETHOD(device_detach,        dummy_codec_detach),
   
           DEVMETHOD(audio_dai_init,       dummy_codec_dai_init),
   
           DEVMETHOD_END
   };
   
   static driver_t dummy_codec_driver = {
           "dummycodec",
           dummy_codec_methods,
           sizeof(struct dummy_codec_softc),
   };
   
   DRIVER_MODULE(dummy_codec, simplebus, dummy_codec_driver, 0, 0);
   SIMPLEBUS_PNP_INFO(compat_data);

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