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

     /*      $NetBSD: ac97var.h,v 1.14 2005/01/10 22:01:37 kent Exp $        */
     /*      $OpenBSD: ac97.h,v 1.4 2000/07/19 09:01:35 csapuntz Exp $       */
     
     /*
      * Copyright (c) 1999 Constantine Sapuntzakis
      *
      * Author:        Constantine Sapuntzakis <csapuntz@stanford.edu>
      *
      * 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 CONSTANTINE SAPUNTZAKIS AND CONTRIBUTORS
     * ``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 OR CONTRIBUTORS
     * 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.
     */
    
    #ifndef _DEV_IC_AC97VAR_H_
    #define _DEV_IC_AC97VAR_H_
    #include <sys/types.h>
    
    struct ac97_codec_if;
    
    /*
     * This is the interface used to attach the AC97 compliant CODEC.
     */
    enum ac97_host_flags {
            AC97_HOST_DONT_READ = 0x1,
            AC97_HOST_SWAPPED_CHANNELS = 0x2        /* l/r is reversed */
    };
    
    struct ac97_host_if {
            void  *arg;
    
            int (*attach)(void *, struct ac97_codec_if *);
            int (*read)(void *, uint8_t, uint16_t *);
            int (*write)(void *, uint8_t, uint16_t);
            int (*reset)(void *);
    
            enum ac97_host_flags (*flags)(void *);
    };
    
    /*
     * This is the interface exported by the AC97 compliant CODEC
     */
    struct ac97_codec_if_vtbl {
            int (*mixer_get_port)(struct ac97_codec_if *, mixer_ctrl_t *);
            int (*mixer_set_port)(struct ac97_codec_if *, mixer_ctrl_t *);
            int (*query_devinfo)(struct ac97_codec_if *, mixer_devinfo_t *);
            int (*get_portnum_by_name)(struct ac97_codec_if *, const char *,
                const char *, const char *);
            /*
             * The AC97 codec driver records the various port settings.  This
             * function can be used to restore the port settings, e.g. after
             * resume from a laptop suspend to disk.
             */
            void (*restore_ports)(struct ac97_codec_if *);
    
            u_int16_t (*get_extcaps)(struct ac97_codec_if *);
            int (*set_rate)(struct ac97_codec_if *, int, u_int *);
            void (*set_clock)(struct ac97_codec_if *, unsigned int);
            void (*detach)(struct ac97_codec_if *);
    };
    
    struct ac97_codec_if {
            struct ac97_codec_if_vtbl *vtbl;
    };
    
    struct device;
    int ac97_attach(struct ac97_host_if *, struct device *);
    
    #define AC97_IS_FIXED_RATE(codec)       \
            !((codec)->vtbl->get_extcaps(codec) & AC97_EXT_AUDIO_VRA)
    #define AC97_IS_4CH(codec)              \
            ((codec)->vtbl->get_extcaps(codec) & AC97_EXT_AUDIO_SDAC)
    #define AC97_IS_6CH(codec)              \
            (((codec)->vtbl->get_extcaps(codec) \
            & (AC97_EXT_AUDIO_SDAC | AC97_EXT_AUDIO_CDAC | AC97_EXT_AUDIO_LDAC)) \
            == (AC97_EXT_AUDIO_SDAC | AC97_EXT_AUDIO_CDAC | AC97_EXT_AUDIO_LDAC))
    #define AC97_HAS_SPDIF(codec)           \
             ((codec)->vtbl->get_extcaps(codec) & AC97_EXT_AUDIO_SPDIF)
    #endif /* _DEV_IC_AC97VAR_H_ */

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