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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */

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#ifndef __SOUND_ASOUND_FM_H

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#define __SOUND_ASOUND_FM_H

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* Advanced Linux Sound Architecture - ALSA

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* Interface file between ALSA driver & user space

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* 4Front Technologies

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* Direct FM control

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#define SNDRV_DM_FM_MODE_OPL2 0x00

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#define SNDRV_DM_FM_MODE_OPL3 0x01

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struct snd_dm_fm_info {

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unsigned char fm_mode; /* OPL mode, see SNDRV_DM_FM_MODE_XXX */

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unsigned char rhythm; /* percussion mode flag */

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};

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

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struct snd_dm_fm_voice {

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unsigned char op; /* operator cell (0 or 1) */

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unsigned char voice; /* FM voice (0 to 17) */

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unsigned char am; /* amplitude modulation */

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unsigned char vibrato; /* vibrato effect */

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unsigned char do_sustain; /* sustain phase */

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unsigned char kbd_scale; /* keyboard scaling */

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unsigned char harmonic; /* 4 bits: harmonic and multiplier */

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unsigned char scale_level; /* 2 bits: decrease output freq rises */

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unsigned char volume; /* 6 bits: volume */

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unsigned char attack; /* 4 bits: attack rate */

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unsigned char decay; /* 4 bits: decay rate */

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unsigned char sustain; /* 4 bits: sustain level */

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unsigned char release; /* 4 bits: release rate */

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unsigned char feedback; /* 3 bits: feedback for op0 */

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unsigned char connection; /* 0 for serial, 1 for parallel */

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unsigned char left; /* stereo left */

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unsigned char right; /* stereo right */

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unsigned char waveform; /* 3 bits: waveform shape */

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};

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* This describes an FM note by its voice, octave, frequency number (10bit)

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* and key on/off.

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struct snd_dm_fm_note {

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unsigned char voice; /* 0-17 voice channel */

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unsigned char octave; /* 3 bits: what octave to play */

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unsigned int fnum; /* 10 bits: frequency number */

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unsigned char key_on; /* set for active, clear for silent */

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};

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

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struct snd_dm_fm_params {

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unsigned char am_depth; /* amplitude modulation depth (1=hi) */

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unsigned char vib_depth; /* vibrato depth (1=hi) */

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unsigned char kbd_split; /* keyboard split */

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unsigned char rhythm; /* percussion mode select */

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/* This block is the percussion instrument data */

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unsigned char bass;

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unsigned char snare;

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unsigned char tomtom;

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unsigned char cymbal;

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unsigned char hihat;

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};

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* FM mode ioctl settings

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#define SNDRV_DM_FM_IOCTL_INFO _IOR('H', 0x20, struct snd_dm_fm_info)

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#define SNDRV_DM_FM_IOCTL_RESET _IO ('H', 0x21)

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#define SNDRV_DM_FM_IOCTL_PLAY_NOTE _IOW('H', 0x22, struct snd_dm_fm_note)

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#define SNDRV_DM_FM_IOCTL_SET_VOICE _IOW('H', 0x23, struct snd_dm_fm_voice)

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#define SNDRV_DM_FM_IOCTL_SET_PARAMS _IOW('H', 0x24, struct snd_dm_fm_params)

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#define SNDRV_DM_FM_IOCTL_SET_MODE _IOW('H', 0x25, int)

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/* for OPL3 only */

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#define SNDRV_DM_FM_IOCTL_SET_CONNECTION _IOW('H', 0x26, int)

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/* SBI patch management */

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#define SNDRV_DM_FM_IOCTL_CLEAR_PATCHES _IO ('H', 0x40)

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#define SNDRV_DM_FM_OSS_IOCTL_RESET 0x20

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#define SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE 0x21

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#define SNDRV_DM_FM_OSS_IOCTL_SET_VOICE 0x22

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#define SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS 0x23

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#define SNDRV_DM_FM_OSS_IOCTL_SET_MODE 0x24

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#define SNDRV_DM_FM_OSS_IOCTL_SET_OPL 0x25

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* Patch Record - fixed size for write

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#define FM_KEY_SBI "SBI\032"

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#define FM_KEY_2OP "2OP\032"

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#define FM_KEY_4OP "4OP\032"

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struct sbi_patch {

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unsigned char prog;

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unsigned char bank;

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char key[4];

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char name[25];

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char extension[7];

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unsigned char data[32];

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};

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#endif /* __SOUND_ASOUND_FM_H */

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