150 lines
5.4 KiB
C
150 lines
5.4 KiB
C
/* $NetBSD: ym2149reg.h,v 1.1 1996/03/27 10:08:34 leo Exp $ */
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/*
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* Copyright (c) 1996 Leo Weppelman.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Leo Weppelman.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _YM2149REG_H
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#define _YM2149REG_H
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/*
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* Yahama YM-2149 Programmable Sound Generator
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*/
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#define YM2149 ((struct ym2149 *)AD_SOUND)
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struct ym2149 {
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volatile u_char sdb[4]; /* use only the even bytes */
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};
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#define sd_selr sdb[0] /* select register */
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#define sd_rdat sdb[0] /* read register data */
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#define sd_wdat sdb[2] /* write register data */
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/*
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* Accessing the YM-2149 registers is indirect through ST-specific
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* circuitry by writing the register number into sd_selr.
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*/
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#define YM_PA0 0 /* Period Channel A, bits 0-7 */
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#define YM_PA1 1 /* Period Channel A, bits 8-11 */
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#define YM_PB0 2 /* Period Channel B, bits 0-7 */
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#define YM_PB1 3 /* Period Channel B, bits 8-11 */
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#define YM_PC0 4 /* Period Channel C, bits 0-7 */
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#define YM_PC1 5 /* Period Channel C, bits 8-11 */
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#define YM_PNG 6 /* Period Noise Generator, bits 0-4 */
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#define YM_MFR 7 /* Multi Function Register */
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#define YM_VA 8 /* Volume Channel A */
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#define YM_VB 9 /* Volume Channel B */
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#define YM_VC 10 /* Volume Channel C */
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#define YM_PE0 11 /* Period Envelope, bits 0-7 */
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#define YM_PE1 12 /* Period Envelope, bits 8-15 */
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#define YM_WFE 13 /* Wave Form Envelope */
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#define YM_IOA 14 /* I/O port A */
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#define YM_IOB 15 /* I/O port B */
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/* bits in MFR: */
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#define SA_OFF 0x01 /* Sound Channel A off */
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#define SB_OFF 0x02 /* Sound Channel B off */
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#define SC_OFF 0x04 /* Sound Channel C off */
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#define NA_OFF 0x08 /* Noise Channel A off */
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#define NB_OFF 0x10 /* Noise Channel B off */
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#define NC_OFF 0x20 /* Noise Channel C off */
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#define PA_OUT 0x40 /* Port A for Output */
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#define PB_OUT 0x80 /* Port B for Output */
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/* bits in Vx: */
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#define VOLUME 0x0F /* 16 steps */
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#define ENVELOP 0x10 /* volume steered by envelope */
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/* bits in WFE: */
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#define WF_HOLD 0x01 /* hold after one period */
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#define WF_ALTERNAT 0x02 /* up and down (no saw teeth) */
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#define WF_ATTACK 0x04 /* start up */
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#define WF_CONTINUE 0x08 /* multiple periods */
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/* names for bits in Port A (ST specific): */
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#define PA_SIDEB 0x01 /* select floppy head - if double sided */
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#define PA_FLOP0 0x02 /* Drive Select Floppy 0 */
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#define PA_FLOP1 0x04 /* Drive Select Floppy 1 */
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#define PA_FDSEL (PA_SIDEB|PA_FLOP0|PA_FLOP1)
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#define PA_SRTS 0x08 /* Serial RTS */
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#define PA_SDTR 0x10 /* Serial DTR */
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#define PA_PSTROBE 0x20 /* Parallel Strobe */
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#define PA_USER 0x40 /* Free Pin on Monitor Connector */
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#define PA_SER2 0x80 /* Choose between LAN or Ser2 port */
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/*
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* Access macro's for Port A
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* Port A is defined as an output port. Reading the port does not work
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* reliably so keeping a 'soft-copy' seems to be the only way to make
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* things work.
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*/
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extern u_char ym2149_ioa; /* Soft-copy of port-A */
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#define ym2149_write_ioport(port, value) { \
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int s = splhigh(); \
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\
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YM2149->sd_selr = port; \
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YM2149->sd_wdat = value; \
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splx(s); \
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}
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#define ym2149_fd_select(select) { \
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ym2149_ioa = (ym2149_ioa & ~PA_FDSEL) | (select & PA_FDSEL); \
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ym2149_write_ioport(YM_IOA, ym2149_ioa); \
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}
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#define ym2149_rts(set) { \
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ym2149_ioa = set ? ym2149_ioa | PA_SRTS : ym2149_ioa & ~PA_SRTS;\
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ym2149_write_ioport(YM_IOA, ym2149_ioa); \
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}
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#define ym2149_dtr(set) { \
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ym2149_ioa = set ? ym2149_ioa | PA_SDTR : ym2149_ioa & ~PA_SDTR;\
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ym2149_write_ioport(YM_IOA, ym2149_ioa); \
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}
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#define ym2149_strobe(set) { \
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ym2149_ioa = set ? ym2149_ioa | PA_PSTROBE : ym2149_ioa & ~PA_PSTROBE;\
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ym2149_write_ioport(YM_IOA, ym2149_ioa); \
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}
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#define ym2149_ser2_select() { \
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ym2149_ioa |= PA_SER2; \
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ym2149_write_ioport(YM_IOA, ym2149_ioa); \
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}
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#ifdef _KERNEL
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/*
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* Prototypes
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*/
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void ym2149_init __P((void));
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#endif
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#endif /* _YM2149REG_H */
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