#ifndef __SOUND_ASOUND_FM_H
#define __SOUND_ASOUND_FM_H

/*
* Advanced Linux Sound Architecture - ALSA
*
* Interface file between ALSA driver & user space
* Copyright (c) 1994-98 by Jaroslav Kysela <[email protected]>,
* 4Front Technologies
*
* Direct FM control
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/

#define SNDRV_DM_FM_MODE_OPL2 0x00
#define SNDRV_DM_FM_MODE_OPL3 0x01

struct snd_dm_fm_info {
unsigned char fm_mode; /* OPL mode, see SNDRV_DM_FM_MODE_XXX */
unsigned char rhythm; /* percussion mode flag */
};

/*
* Data structure composing an FM "note" or sound event.
*/

struct snd_dm_fm_voice {
unsigned char op; /* operator cell (0 or 1) */
unsigned char voice; /* FM voice (0 to 17) */

unsigned char am; /* amplitude modulation */
unsigned char vibrato; /* vibrato effect */
unsigned char do_sustain; /* sustain phase */
unsigned char kbd_scale; /* keyboard scaling */
unsigned char harmonic; /* 4 bits: harmonic and multiplier */
unsigned char scale_level; /* 2 bits: decrease output freq rises */
unsigned char volume; /* 6 bits: volume */

unsigned char attack; /* 4 bits: attack rate */
unsigned char decay; /* 4 bits: decay rate */
unsigned char sustain; /* 4 bits: sustain level */
unsigned char release; /* 4 bits: release rate */

unsigned char feedback; /* 3 bits: feedback for op0 */
unsigned char connection; /* 0 for serial, 1 for parallel */
unsigned char left; /* stereo left */
unsigned char right; /* stereo right */
unsigned char waveform; /* 3 bits: waveform shape */
};

/*
* This describes an FM note by its voice, octave, frequency number (10bit)
* and key on/off.
*/

struct snd_dm_fm_note {
unsigned char voice; /* 0-17 voice channel */
unsigned char octave; /* 3 bits: what octave to play */
unsigned int fnum; /* 10 bits: frequency number */
unsigned char key_on; /* set for active, clear for silent */
};

/*
* FM parameters that apply globally to all voices, and thus are not "notes"
*/

struct snd_dm_fm_params {
unsigned char am_depth; /* amplitude modulation depth (1=hi) */
unsigned char vib_depth; /* vibrato depth (1=hi) */
unsigned char kbd_split; /* keyboard split */
unsigned char rhythm; /* percussion mode select */

/* This block is the percussion instrument data */
unsigned char bass;
unsigned char snare;
unsigned char tomtom;
unsigned char cymbal;
unsigned char hihat;
};

/*
* FM mode ioctl settings
*/

#define SNDRV_DM_FM_IOCTL_INFO _IOR('H', 0x20, struct snd_dm_fm_info)
#define SNDRV_DM_FM_IOCTL_RESET _IO ('H', 0x21)
#define SNDRV_DM_FM_IOCTL_PLAY_NOTE _IOW('H', 0x22, struct snd_dm_fm_note)
#define SNDRV_DM_FM_IOCTL_SET_VOICE _IOW('H', 0x23, struct snd_dm_fm_voice)
#define SNDRV_DM_FM_IOCTL_SET_PARAMS _IOW('H', 0x24, struct snd_dm_fm_params)
#define SNDRV_DM_FM_IOCTL_SET_MODE _IOW('H', 0x25, int)
/* for OPL3 only */
#define SNDRV_DM_FM_IOCTL_SET_CONNECTION _IOW('H', 0x26, int)
/* SBI patch management */
#define SNDRV_DM_FM_IOCTL_CLEAR_PATCHES _IO ('H', 0x40)

#define SNDRV_DM_FM_OSS_IOCTL_RESET 0x20
#define SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE 0x21
#define SNDRV_DM_FM_OSS_IOCTL_SET_VOICE 0x22
#define SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS 0x23
#define SNDRV_DM_FM_OSS_IOCTL_SET_MODE 0x24
#define SNDRV_DM_FM_OSS_IOCTL_SET_OPL 0x25

/*
* Patch Record - fixed size for write
*/

#define FM_KEY_SBI "SBI\032"
#define FM_KEY_2OP "2OP\032"
#define FM_KEY_4OP "4OP\032"

struct sbi_patch {
unsigned char prog;
unsigned char bank;
char key[4];
char name[25];
char extension[7];
unsigned char data[32];
};

#endif /* __SOUND_ASOUND_FM_H */