1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org> 5 * All rights reserved. 6 * 7 * Derived from the public domain Linux driver 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 THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHERIN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THEPOSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 #ifndef _NM256_H_ 34 #define _NM256_H_ 35 36 /* The BIOS signature. */ 37 #define NM_SIGNATURE 0x4e4d0000 38 /* Signature mask. */ 39 #define NM_SIG_MASK 0xffff0000 40 41 /* Size of the second memory area. */ 42 #define NM_PORT2_SIZE 4096 43 44 /* The base offset of the mixer in the second memory area. */ 45 #define NM_MIXER_OFFSET 0x600 46 47 /* The base offset for the AC97 test */ 48 #define NM_MIXER_PRESENCE 0xa06 49 #define NM_PRESENCE_MASK 0x050 50 #define NM_PRESENCE_VALUE 0x040 51 52 /* The maximum size of a coefficient entry. */ 53 #define NM_MAX_COEFFICIENT 0x5000 54 55 /* The interrupt register. */ 56 #define NM_INT_REG 0xa04 57 /* And its bits. */ 58 #define NM_PLAYBACK_INT 0x40 59 #define NM_RECORD_INT 0x100 60 #define NM_MISC_INT_1 0x4000 61 #define NM_MISC_INT_2 0x1 62 63 /* The AV's "mixer ready" status bit and location. */ 64 #define NM_MIXER_STATUS_OFFSET 0xa04 65 #define NM_MIXER_READY_MASK 0x0800 66 67 /* 68 * For the ZX. It uses the same interrupt register, but it holds 32 69 * bits instead of 16. 70 */ 71 #define NM2_PLAYBACK_INT 0x10000 72 #define NM2_RECORD_INT 0x80000 73 #define NM2_MISC_INT_1 0x8 74 #define NM2_MISC_INT_2 0x2 75 76 /* The ZX's "mixer ready" status bit and location. */ 77 #define NM2_MIXER_STATUS_OFFSET 0xa06 78 #define NM2_MIXER_READY_MASK 0x0800 79 80 /* The playback registers start from here. */ 81 #define NM_PLAYBACK_REG_OFFSET 0x0 82 /* The record registers start from here. */ 83 #define NM_RECORD_REG_OFFSET 0x200 84 85 /* The rate register is located 2 bytes from the start of the register area. */ 86 #define NM_RATE_REG_OFFSET 2 87 88 /* Mono/stereo flag, number of bits on playback, and rate mask. */ 89 #define NM_RATE_STEREO 1 90 #define NM_RATE_BITS_16 2 91 #define NM_RATE_MASK 0xf0 92 93 /* Playback enable register. */ 94 #define NM_PLAYBACK_ENABLE_REG (NM_PLAYBACK_REG_OFFSET + 0x1) 95 #define NM_PLAYBACK_ENABLE_FLAG 1 96 #define NM_PLAYBACK_ONESHOT 2 97 #define NM_PLAYBACK_FREERUN 4 98 99 /* Mutes the audio output. */ 100 #define NM_AUDIO_MUTE_REG (NM_PLAYBACK_REG_OFFSET + 0x18) 101 #define NM_AUDIO_MUTE_LEFT 0x8000 102 #define NM_AUDIO_MUTE_RIGHT 0x0080 103 #define NM_AUDIO_MUTE_BOTH 0x8080 104 105 /* Recording enable register. */ 106 #define NM_RECORD_ENABLE_REG (NM_RECORD_REG_OFFSET + 0) 107 #define NM_RECORD_ENABLE_FLAG 1 108 #define NM_RECORD_FREERUN 2 109 110 #define NM_RBUFFER_START (NM_RECORD_REG_OFFSET + 0x4) 111 #define NM_RBUFFER_END (NM_RECORD_REG_OFFSET + 0x10) 112 #define NM_RBUFFER_WMARK (NM_RECORD_REG_OFFSET + 0xc) 113 #define NM_RBUFFER_CURRP (NM_RECORD_REG_OFFSET + 0x8) 114 115 #define NM_PBUFFER_START (NM_PLAYBACK_REG_OFFSET + 0x4) 116 #define NM_PBUFFER_END (NM_PLAYBACK_REG_OFFSET + 0x14) 117 #define NM_PBUFFER_WMARK (NM_PLAYBACK_REG_OFFSET + 0xc) 118 #define NM_PBUFFER_CURRP (NM_PLAYBACK_REG_OFFSET + 0x8) 119 120 #endif 121