The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/ac97var.h

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    1 /*      $NetBSD: ac97var.h,v 1.8.2.1 2004/09/22 20:58:06 jmc Exp $      */
    2 /*      $OpenBSD: ac97.h,v 1.4 2000/07/19 09:01:35 csapuntz Exp $       */
    3 
    4 /*
    5  * Copyright (c) 1999 Constantine Sapuntzakis
    6  *
    7  * Author:        Constantine Sapuntzakis <csapuntz@stanford.edu>
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY CONSTANTINE SAPUNTZAKIS AND CONTRIBUTORS
   19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
   22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   28  * POSSIBILITY OF SUCH DAMAGE.
   29  */
   30 
   31 struct ac97_codec_if;
   32 
   33 /* 
   34  * This is the interface used to attach the AC97 compliant CODEC.
   35  */
   36 enum ac97_host_flags {
   37         AC97_HOST_DONT_READ = 0x1,
   38         AC97_HOST_SWAPPED_CHANNELS = 0x2        /* l/r is reversed */
   39 };
   40 
   41 struct ac97_host_if {
   42         void  *arg;
   43 
   44         int (*attach)(void *, struct ac97_codec_if *);
   45         int (*read)(void *, u_int8_t, u_int16_t *);
   46         int (*write)(void *, u_int8_t, u_int16_t);
   47         int (*reset)(void *);
   48 
   49         enum ac97_host_flags (*flags)(void *);
   50 };
   51 
   52 /*
   53  * This is the interface exported by the AC97 compliant CODEC
   54  */
   55 struct ac97_codec_if_vtbl {
   56         int (*mixer_get_port)(struct ac97_codec_if *, mixer_ctrl_t *);
   57         int (*mixer_set_port)(struct ac97_codec_if *, mixer_ctrl_t *);
   58         int (*query_devinfo)(struct ac97_codec_if *, mixer_devinfo_t *);
   59         int (*get_portnum_by_name)(struct ac97_codec_if *, const char *,
   60             const char *, const char *);
   61         /*
   62          * The AC97 codec driver records the various port settings.  This
   63          * function can be used to restore the port settings, e.g. after
   64          * resume from a laptop suspend to disk.
   65          */
   66         void (*restore_ports)(struct ac97_codec_if *);
   67 
   68         u_int16_t (*get_extcaps)(struct ac97_codec_if *);
   69         int (*set_rate)(struct ac97_codec_if *, int, u_long *);
   70         void (*set_clock)(struct ac97_codec_if *, unsigned int);
   71 };
   72 
   73 struct ac97_codec_if {
   74         struct ac97_codec_if_vtbl *vtbl;
   75 };
   76 
   77 int ac97_attach __P((struct ac97_host_if *));

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