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ac97var.h revision 1.12.2.1 
      1 /*	$NetBSD: ac97var.h,v 1.12.2.1 2005/01/02 16:12:37 kent 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 (at) 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 #ifndef _DEV_IC_AC97VAR_H_
     32 #define	_DEV_IC_AC97VAR_H_
     33 #include <sys/types.h>
     34 
     35 struct ac97_codec_if;
     36 
     37 /*
     38  * This is the interface used to attach the AC97 compliant CODEC.
     39  */
     40 enum ac97_host_flags {
     41 	AC97_HOST_DONT_READ = 0x1,
     42 	AC97_HOST_SWAPPED_CHANNELS = 0x2	/* l/r is reversed */
     43 };
     44 
     45 struct ac97_host_if {
     46 	void  *arg;
     47 
     48 	int (*attach)(void *, struct ac97_codec_if *);
     49 	int (*read)(void *, uint8_t, uint16_t *);
     50 	int (*write)(void *, uint8_t, uint16_t);
     51 	int (*reset)(void *);
     52 
     53 	enum ac97_host_flags (*flags)(void *);
     54 };
     55 
     56 /*
     57  * This is the interface exported by the AC97 compliant CODEC
     58  */
     59 struct ac97_codec_if_vtbl {
     60 	int (*mixer_get_port)(struct ac97_codec_if *, mixer_ctrl_t *);
     61 	int (*mixer_set_port)(struct ac97_codec_if *, mixer_ctrl_t *);
     62 	int (*query_devinfo)(struct ac97_codec_if *, mixer_devinfo_t *);
     63 	int (*get_portnum_by_name)(struct ac97_codec_if *, const char *,
     64 	    const char *, const char *);
     65 	/*
     66 	 * The AC97 codec driver records the various port settings.  This
     67 	 * function can be used to restore the port settings, e.g. after
     68 	 * resume from a laptop suspend to disk.
     69 	 */
     70 	void (*restore_ports)(struct ac97_codec_if *);
     71 
     72 	u_int16_t (*get_extcaps)(struct ac97_codec_if *);
     73 	int (*set_rate)(struct ac97_codec_if *, int, u_int *);
     74 	void (*set_clock)(struct ac97_codec_if *, unsigned int);
     75 	void (*detach)(struct ac97_codec_if *);
     76 };
     77 
     78 struct ac97_codec_if {
     79 	struct ac97_codec_if_vtbl *vtbl;
     80 };
     81 
     82 struct device;
     83 int ac97_attach(struct ac97_host_if *, struct device *);
     84 
     85 #define AC97_IS_FIXED_RATE(codec)	\
     86 	!((codec)->vtbl->get_extcaps(codec) & AC97_EXT_AUDIO_VRA)
     87 #define AC97_IS_4CH(codec)		\
     88 	((codec)->vtbl->get_extcaps(codec) & AC97_EXT_AUDIO_SDAC)
     89 #define AC97_IS_6CH(codec)		\
     90 	(((codec)->vtbl->get_extcaps(codec) \
     91 	& (AC97_EXT_AUDIO_SDAC | AC97_EXT_AUDIO_CDAC | AC97_EXT_AUDIO_LDAC)) \
     92 	== (AC97_EXT_AUDIO_SDAC | AC97_EXT_AUDIO_CDAC | AC97_EXT_AUDIO_LDAC))
     93 
     94 #endif /* _DEV_IC_AC97VAR_H_ */
     95