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ac97var.h revision 1.3.2.1 
      1 /*	$NetBSD: ac97var.h,v 1.3.2.1 2001/06/21 20:01:52 nathanw 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 struct ac97_codec_if;
     32 
     33 /*
     34  * This is the interface used to attach the AC97 compliant CODEC.
     35  */
     36 struct ac97_host_if {
     37 	void  *arg;
     38 
     39 	int (*attach)(void *arg, struct ac97_codec_if *codecif);
     40 	int (*read)(void *arg, u_int8_t reg, u_int16_t *val);
     41 	int (*write)(void *arg, u_int8_t reg, u_int16_t val);
     42 	void (*reset)(void *arg);
     43 
     44 	enum ac97_host_flags {
     45 		AC97_HOST_DONT_READ = 0x1,
     46 		AC97_HOST_SWAPPED_CHANNELS = 0x2	/* l/r is reversed */
     47 	};
     48 
     49 	enum ac97_host_flags (*flags)(void *arg);
     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 *addr, mixer_ctrl_t *cp);
     57 	int (*mixer_set_port)(struct ac97_codec_if *addr, mixer_ctrl_t *cp);
     58 	int (*query_devinfo)(struct ac97_codec_if *addr, mixer_devinfo_t *cp);
     59 	int (*get_portnum_by_name)(struct ac97_codec_if *addr,
     60 				      char *class, char *device,
     61 				      char *qualifier);
     62 	/*
     63 	 * The AC97 codec driver records the various port settings.  This
     64 	 * function can be used to restore the port settings, e.g. after
     65 	 * resume from a laptop suspend to disk.
     66 	 */
     67 	void (*restore_ports)(struct ac97_codec_if *addr);
     68 };
     69 
     70 struct ac97_codec_if {
     71 	struct ac97_codec_if_vtbl *vtbl;
     72 };
     73 
     74 int ac97_attach __P((struct ac97_host_if *));
     75