1 /* $NetBSD: ym2149reg.h,v 1.7 2009/10/20 19:10:11 snj Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Leo Weppelman. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef _YM2149REG_H 29 #define _YM2149REG_H 30 /* 31 * Yahama YM-2149 Programmable Sound Generator 32 */ 33 34 #define YM2149 ((struct ym2149 *)AD_SOUND) 35 36 struct ym2149 { 37 volatile u_char sdb[4]; /* use only the even bytes */ 38 }; 39 40 #define sd_selr sdb[0] /* select register */ 41 #define sd_rdat sdb[0] /* read register data */ 42 #define sd_wdat sdb[2] /* write register data */ 43 44 /* 45 * Accessing the YM-2149 registers is indirect through ST-specific 46 * circuitry by writing the register number into sd_selr. 47 */ 48 #define YM_PA0 0 /* Period Channel A, bits 0-7 */ 49 #define YM_PA1 1 /* Period Channel A, bits 8-11 */ 50 #define YM_PB0 2 /* Period Channel B, bits 0-7 */ 51 #define YM_PB1 3 /* Period Channel B, bits 8-11 */ 52 #define YM_PC0 4 /* Period Channel C, bits 0-7 */ 53 #define YM_PC1 5 /* Period Channel C, bits 8-11 */ 54 #define YM_PNG 6 /* Period Noise Generator, bits 0-4 */ 55 #define YM_MFR 7 /* Multi Function Register */ 56 #define YM_VA 8 /* Volume Channel A */ 57 #define YM_VB 9 /* Volume Channel B */ 58 #define YM_VC 10 /* Volume Channel C */ 59 #define YM_PE0 11 /* Period Envelope, bits 0-7 */ 60 #define YM_PE1 12 /* Period Envelope, bits 8-15 */ 61 #define YM_WFE 13 /* Wave Form Envelope */ 62 #define YM_IOA 14 /* I/O port A */ 63 #define YM_IOB 15 /* I/O port B */ 64 65 /* bits in MFR: */ 66 #define SA_OFF 0x01 /* Sound Channel A off */ 67 #define SB_OFF 0x02 /* Sound Channel B off */ 68 #define SC_OFF 0x04 /* Sound Channel C off */ 69 #define NA_OFF 0x08 /* Noise Channel A off */ 70 #define NB_OFF 0x10 /* Noise Channel B off */ 71 #define NC_OFF 0x20 /* Noise Channel C off */ 72 #define PA_OUT 0x40 /* Port A for Output */ 73 #define PB_OUT 0x80 /* Port B for Output */ 74 75 /* bits in Vx: */ 76 #define VOLUME 0x0F /* 16 steps */ 77 #define ENVELOP 0x10 /* volume steered by envelope */ 78 79 /* bits in WFE: */ 80 #define WF_HOLD 0x01 /* hold after one period */ 81 #define WF_ALTERNAT 0x02 /* up and down (no saw teeth) */ 82 #define WF_ATTACK 0x04 /* start up */ 83 #define WF_CONTINUE 0x08 /* multiple periods */ 84 85 /* names for bits in Port A (ST specific): */ 86 #define PA_SIDEB 0x01 /* select floppy head - if double sided */ 87 #define PA_FLOP0 0x02 /* Drive Select Floppy 0 */ 88 #define PA_FLOP1 0x04 /* Drive Select Floppy 1 */ 89 #define PA_FDSEL (PA_SIDEB|PA_FLOP0|PA_FLOP1) 90 #define PA_SRTS 0x08 /* Serial RTS */ 91 #define PA_SDTR 0x10 /* Serial DTR */ 92 #define PA_PSTROBE 0x20 /* Parallel Strobe */ 93 #define PA_USER 0x40 /* Free Pin on Monitor Connector */ 94 #define PA_SER2 0x80 /* Choose between LAN or Ser2 port */ 95 96 /* 97 * Access macro's for Port A 98 * Port A is defined as an output port. Reading the port does not work 99 * reliably so keeping a 'soft-copy' seems to be the only way to make 100 * things work. 101 */ 102 extern u_char ym2149_ioa; /* Soft-copy of port-A */ 103 104 #define ym2149_write_ioport(port, value) { \ 105 int _os = splhigh(); \ 106 \ 107 YM2149->sd_selr = port; \ 108 YM2149->sd_wdat = value; \ 109 splx(_os); \ 110 } 111 112 #define ym2149_write_ioport2(port, value) { \ 113 YM2149->sd_selr = port; \ 114 YM2149->sd_wdat = value; \ 115 } 116 117 #define ym2149_fd_select(select) { \ 118 int _s = splhigh(); \ 119 \ 120 ym2149_ioa = (ym2149_ioa & ~PA_FDSEL) | (select & PA_FDSEL); \ 121 ym2149_write_ioport(YM_IOA, ym2149_ioa); \ 122 splx(_s); \ 123 } 124 125 #define ym2149_rts(set) { \ 126 int _s = splhigh(); \ 127 \ 128 ym2149_ioa = set ? ym2149_ioa | PA_SRTS : ym2149_ioa & ~PA_SRTS;\ 129 ym2149_write_ioport(YM_IOA, ym2149_ioa); \ 130 splx(_s); \ 131 } 132 133 #define ym2149_dtr(set) { \ 134 int _s = splhigh(); \ 135 \ 136 ym2149_ioa = set ? ym2149_ioa | PA_SDTR : ym2149_ioa & ~PA_SDTR;\ 137 ym2149_write_ioport(YM_IOA, ym2149_ioa); \ 138 splx(_s); \ 139 } 140 141 #define ym2149_strobe(set) { \ 142 int _s = splhigh(); \ 143 \ 144 ym2149_ioa = set ? ym2149_ioa | PA_PSTROBE : ym2149_ioa & ~PA_PSTROBE;\ 145 ym2149_write_ioport(YM_IOA, ym2149_ioa); \ 146 splx(_s); \ 147 } 148 149 #define ym2149_ser2(set) { \ 150 int _s = splhigh(); \ 151 \ 152 ym2149_ioa = set ? ym2149_ioa | PA_SER2 : ym2149_ioa & ~PA_SER2;\ 153 ym2149_write_ioport(YM_IOA, ym2149_ioa); \ 154 splx(_s); \ 155 } 156 157 #undef ym2149_write_ioport2 158 159 #ifdef _KERNEL 160 /* 161 * Prototypes 162 */ 163 void ym2149_init(void); 164 #endif 165 166 #endif /* _YM2149REG_H */ 167