text: /*-
   * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
   * All rights reserved.
   *
   * Derived from the public domain Linux driver
   *
   * 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 THE AUTHOR 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, WHETHERIN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THEPOSSIBILITY OF
   * SUCH DAMAGE.
   *
   * $FreeBSD: releng/9.3/sys/dev/sound/pci/neomagic.h 139749 2005-01-06 01:43:34Z imp $
   */
  
  #ifndef _NM256_H_
  #define _NM256_H_
  
  /* The BIOS signature. */
  #define NM_SIGNATURE 0x4e4d0000
  /* Signature mask. */
  #define NM_SIG_MASK 0xffff0000
  
  /* Size of the second memory area. */
  #define NM_PORT2_SIZE 4096
  
  /* The base offset of the mixer in the second memory area. */
  #define NM_MIXER_OFFSET 0x600
  
  /* The base offset for the AC97 test */
  #define NM_MIXER_PRESENCE 0xa06
  #define NM_PRESENCE_MASK  0x050
  #define NM_PRESENCE_VALUE 0x040
  
  /* The maximum size of a coefficient entry. */
  #define NM_MAX_COEFFICIENT 0x5000
  
  /* The interrupt register. */
  #define NM_INT_REG 0xa04
  /* And its bits. */
  #define NM_PLAYBACK_INT 0x40
  #define NM_RECORD_INT 0x100
  #define NM_MISC_INT_1 0x4000
  #define NM_MISC_INT_2 0x1
  
  /* The AV's "mixer ready" status bit and location. */
  #define NM_MIXER_STATUS_OFFSET 0xa04
  #define NM_MIXER_READY_MASK 0x0800
  
  /*
   * For the ZX.  It uses the same interrupt register, but it holds 32
   * bits instead of 16.
   */
  #define NM2_PLAYBACK_INT 0x10000
  #define NM2_RECORD_INT 0x80000
  #define NM2_MISC_INT_1 0x8
  #define NM2_MISC_INT_2 0x2
  
  /* The ZX's "mixer ready" status bit and location. */
  #define NM2_MIXER_STATUS_OFFSET 0xa06
  #define NM2_MIXER_READY_MASK 0x0800
  
  /* The playback registers start from here. */
  #define NM_PLAYBACK_REG_OFFSET 0x0
  /* The record registers start from here. */
  #define NM_RECORD_REG_OFFSET 0x200
  
  /* The rate register is located 2 bytes from the start of the register area. */
  #define NM_RATE_REG_OFFSET 2
  
  /* Mono/stereo flag, number of bits on playback, and rate mask. */
  #define NM_RATE_STEREO 1
  #define NM_RATE_BITS_16 2
  #define NM_RATE_MASK 0xf0
  
  /* Playback enable register. */
  #define NM_PLAYBACK_ENABLE_REG (NM_PLAYBACK_REG_OFFSET + 0x1)
  #define NM_PLAYBACK_ENABLE_FLAG 1
  #define NM_PLAYBACK_ONESHOT 2
  #define NM_PLAYBACK_FREERUN 4
  
  /* Mutes the audio output. */
  #define NM_AUDIO_MUTE_REG (NM_PLAYBACK_REG_OFFSET + 0x18)
  #define NM_AUDIO_MUTE_LEFT 0x8000
  #define NM_AUDIO_MUTE_RIGHT 0x0080
  #define NM_AUDIO_MUTE_BOTH 0x8080
  
  /* Recording enable register. */
  #define NM_RECORD_ENABLE_REG (NM_RECORD_REG_OFFSET + 0)
  #define NM_RECORD_ENABLE_FLAG 1
  #define NM_RECORD_FREERUN 2
  
  #define NM_RBUFFER_START (NM_RECORD_REG_OFFSET + 0x4)
  #define NM_RBUFFER_END   (NM_RECORD_REG_OFFSET + 0x10)
  #define NM_RBUFFER_WMARK (NM_RECORD_REG_OFFSET + 0xc)
  #define NM_RBUFFER_CURRP (NM_RECORD_REG_OFFSET + 0x8)
  
  #define NM_PBUFFER_START (NM_PLAYBACK_REG_OFFSET + 0x4)
  #define NM_PBUFFER_END   (NM_PLAYBACK_REG_OFFSET + 0x14)
  #define NM_PBUFFER_WMARK (NM_PLAYBACK_REG_OFFSET + 0xc)
  #define NM_PBUFFER_CURRP (NM_PLAYBACK_REG_OFFSET + 0x8)
  
  
  #endif
  