/* $NetBSD: ym2149reg.h,v 1.7 2009/10/20 19:10:11 snj Exp $ */
/*
* Copyright (c) 1996 Leo Weppelman.
* All rights reserved.
*
* 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 ``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 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, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _YM2149REG_H
#define _YM2149REG_H
/*
* Yahama YM-2149 Programmable Sound Generator
*/
#define YM2149 ((struct ym2149 *)AD_SOUND)
struct ym2149 {
volatile u_char sdb[4]; /* use only the even bytes */
};
#define sd_selr sdb[0] /* select register */
#define sd_rdat sdb[0] /* read register data */
#define sd_wdat sdb[2] /* write register data */
/*
* Accessing the YM-2149 registers is indirect through ST-specific
* circuitry by writing the register number into sd_selr.
*/
#define YM_PA0 0 /* Period Channel A, bits 0-7 */
#define YM_PA1 1 /* Period Channel A, bits 8-11 */
#define YM_PB0 2 /* Period Channel B, bits 0-7 */
#define YM_PB1 3 /* Period Channel B, bits 8-11 */
#define YM_PC0 4 /* Period Channel C, bits 0-7 */
#define YM_PC1 5 /* Period Channel C, bits 8-11 */
#define YM_PNG 6 /* Period Noise Generator, bits 0-4 */
#define YM_MFR 7 /* Multi Function Register */
#define YM_VA 8 /* Volume Channel A */
#define YM_VB 9 /* Volume Channel B */
#define YM_VC 10 /* Volume Channel C */
#define YM_PE0 11 /* Period Envelope, bits 0-7 */
#define YM_PE1 12 /* Period Envelope, bits 8-15 */
#define YM_WFE 13 /* Wave Form Envelope */
#define YM_IOA 14 /* I/O port A */
#define YM_IOB 15 /* I/O port B */
/* bits in MFR: */
#define SA_OFF 0x01 /* Sound Channel A off */
#define SB_OFF 0x02 /* Sound Channel B off */
#define SC_OFF 0x04 /* Sound Channel C off */
#define NA_OFF 0x08 /* Noise Channel A off */
#define NB_OFF 0x10 /* Noise Channel B off */
#define NC_OFF 0x20 /* Noise Channel C off */
#define PA_OUT 0x40 /* Port A for Output */
#define PB_OUT 0x80 /* Port B for Output */
/* bits in Vx: */
#define VOLUME 0x0F /* 16 steps */
#define ENVELOP 0x10 /* volume steered by envelope */
/* bits in WFE: */
#define WF_HOLD 0x01 /* hold after one period */
#define WF_ALTERNAT 0x02 /* up and down (no saw teeth) */
#define WF_ATTACK 0x04 /* start up */
#define WF_CONTINUE 0x08 /* multiple periods */
/* names for bits in Port A (ST specific): */
#define PA_SIDEB 0x01 /* select floppy head - if double sided */
#define PA_FLOP0 0x02 /* Drive Select Floppy 0 */
#define PA_FLOP1 0x04 /* Drive Select Floppy 1 */
#define PA_FDSEL (PA_SIDEB|PA_FLOP0|PA_FLOP1)
#define PA_SRTS 0x08 /* Serial RTS */
#define PA_SDTR 0x10 /* Serial DTR */
#define PA_PSTROBE 0x20 /* Parallel Strobe */
#define PA_USER 0x40 /* Free Pin on Monitor Connector */
#define PA_SER2 0x80 /* Choose between LAN or Ser2 port */
/*
* Access macro's for Port A
* Port A is defined as an output port. Reading the port does not work
* reliably so keeping a 'soft-copy' seems to be the only way to make
* things work.
*/
extern u_char ym2149_ioa; /* Soft-copy of port-A */
#define ym2149_write_ioport(port, value) { \
int _os = splhigh(); \
\
YM2149->sd_selr = port; \
YM2149->sd_wdat = value; \
splx(_os); \
}
#define ym2149_write_ioport2(port, value) { \
YM2149->sd_selr = port; \
YM2149->sd_wdat = value; \
}
#define ym2149_fd_select(select) { \
int _s = splhigh(); \
\
ym2149_ioa = (ym2149_ioa & ~PA_FDSEL) | (select & PA_FDSEL); \
ym2149_write_ioport(YM_IOA, ym2149_ioa); \
splx(_s); \
}
#define ym2149_rts(set) { \
int _s = splhigh(); \
\
ym2149_ioa = set ? ym2149_ioa | PA_SRTS : ym2149_ioa & ~PA_SRTS;\
ym2149_write_ioport(YM_IOA, ym2149_ioa); \
splx(_s); \
}
#define ym2149_dtr(set) { \
int _s = splhigh(); \
\
ym2149_ioa = set ? ym2149_ioa | PA_SDTR : ym2149_ioa & ~PA_SDTR;\
ym2149_write_ioport(YM_IOA, ym2149_ioa); \
splx(_s); \
}
#define ym2149_strobe(set) { \
int _s = splhigh(); \
\
ym2149_ioa = set ? ym2149_ioa | PA_PSTROBE : ym2149_ioa & ~PA_PSTROBE;\
ym2149_write_ioport(YM_IOA, ym2149_ioa); \
splx(_s); \
}
#define ym2149_ser2(set) { \
int _s = splhigh(); \
\
ym2149_ioa = set ? ym2149_ioa | PA_SER2 : ym2149_ioa & ~PA_SER2;\
ym2149_write_ioport(YM_IOA, ym2149_ioa); \
splx(_s); \
}
#undef ym2149_write_ioport2
#ifdef _KERNEL
/*
* Prototypes
*/
void ym2149_init(void);
#endif
#endif /* _YM2149REG_H */