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      1 /* $NetBSD: ics2101reg.h,v 1.7 2008/04/28 20:23:50 martin Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Ken Hornstein and John Kohl.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Register defs for Integrated Circuit Systems, Inc. ICS-2101 mixer
     34  * chip, used on Gravis UltraSound cards.
     35  *
     36  * Block diagram:
     37  *                                  port #
     38  *				       	0 +----+
     39  *   Mic in (Right/Left)	-->--->---|    |
     40  *					1 |    |	  amp --->---- amp out
     41  *   Line in (Right/Left)	-->--->---|    |	   |
     42  *					2 |    |	   |
     43  *   CD in (Right/Left)		-->--->---|    |--->---+---+----->---- line out
     44  *					3 |    |       |
     45  *   GF1 Out (Right/Left)	-->--->---|    |       |
     46  *					4 |    |       |
     47  *   Unused (Right/Left)	-->--->---|    |       |
     48  *					  +----+       v
     49  *					ICS 2101       |
     50  *						       |
     51  *	        To GF1 Sample Input ---<---------------+
     52  *
     53  *  Master output volume: mixer channel #5
     54  */
     55 
     56 /*
     57  * ICS Mixer registers
     58  */
     59 
     60 #define ICSMIX_CTRL_LEFT	0x00		/* Control left channel */
     61 #define ICSMIX_CTRL_RIGHT	0x01		/* Control right channel */
     62 #define ICSMIX_ATTN_LEFT	0x02		/* Attenuate left channel */
     63 #define ICSMIX_ATTN_RIGHT	0x03		/* Attenutate right channel */
     64 #define ICSMIX_PAEN		0x04		/* Panning control */
     65 #define ICSMIX_CHAN_0		0		/* Values for mixer channels */
     66 #define ICSMIX_CHAN_1		1
     67 #define ICSMIX_CHAN_2		2
     68 #define ICSMIX_CHAN_3		3
     69 #define ICSMIX_CHAN_4		4
     70 #define ICSMIX_CHAN_5		5
     71 
     72 #define	ICSMIX_MIN_ATTN		0x7f
     73 #define	ICSMIX_MAX_ATTN		0x00
     74 /*
     75  * The ICS mixer is write-only--it cannot be queried for current settings.
     76  * Drivers must keep track of current values themselves.
     77  */
     78