diff options
Diffstat (limited to 'include/sound/opl3.h')
| -rw-r--r-- | include/sound/opl3.h | 375 |
1 files changed, 375 insertions, 0 deletions
diff --git a/include/sound/opl3.h b/include/sound/opl3.h new file mode 100644 index 0000000000..ebf3852da9 --- /dev/null +++ b/include/sound/opl3.h @@ -0,0 +1,375 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __SOUND_OPL3_H +#define __SOUND_OPL3_H + +/* + * Definitions of the OPL-3 registers. + * + * Copyright (c) by Jaroslav Kysela <perex@perex.cz>, + * Hannu Savolainen 1993-1996 + * + * The OPL-3 mode is switched on by writing 0x01, to the offset 5 + * of the right side. + * + * Another special register at the right side is at offset 4. It contains + * a bit mask defining which voices are used as 4 OP voices. + * + * The percussive mode is implemented in the left side only. + * + * With the above exceptions the both sides can be operated independently. + * + * A 4 OP voice can be created by setting the corresponding + * bit at offset 4 of the right side. + * + * For example setting the rightmost bit (0x01) changes the + * first voice on the right side to the 4 OP mode. The fourth + * voice is made inaccessible. + * + * If a voice is set to the 2 OP mode, it works like 2 OP modes + * of the original YM3812 (AdLib). In addition the voice can + * be connected the left, right or both stereo channels. It can + * even be left unconnected. This works with 4 OP voices also. + * + * The stereo connection bits are located in the FEEDBACK_CONNECTION + * register of the voice (0xC0-0xC8). In 4 OP voices these bits are + * in the second half of the voice. + */ + +#include <sound/core.h> +#include <sound/hwdep.h> +#include <sound/timer.h> +#include <sound/seq_midi_emul.h> +#include <sound/seq_oss.h> +#include <sound/seq_oss_legacy.h> +#include <sound/seq_device.h> +#include <sound/asound_fm.h> + +/* + * Register numbers for the global registers + */ + +#define OPL3_REG_TEST 0x01 +#define OPL3_ENABLE_WAVE_SELECT 0x20 + +#define OPL3_REG_TIMER1 0x02 +#define OPL3_REG_TIMER2 0x03 +#define OPL3_REG_TIMER_CONTROL 0x04 /* Left side */ +#define OPL3_IRQ_RESET 0x80 +#define OPL3_TIMER1_MASK 0x40 +#define OPL3_TIMER2_MASK 0x20 +#define OPL3_TIMER1_START 0x01 +#define OPL3_TIMER2_START 0x02 + +#define OPL3_REG_CONNECTION_SELECT 0x04 /* Right side */ +#define OPL3_LEFT_4OP_0 0x01 +#define OPL3_LEFT_4OP_1 0x02 +#define OPL3_LEFT_4OP_2 0x04 +#define OPL3_RIGHT_4OP_0 0x08 +#define OPL3_RIGHT_4OP_1 0x10 +#define OPL3_RIGHT_4OP_2 0x20 + +#define OPL3_REG_MODE 0x05 /* Right side */ +#define OPL3_OPL3_ENABLE 0x01 /* OPL3 mode */ +#define OPL3_OPL4_ENABLE 0x02 /* OPL4 mode */ + +#define OPL3_REG_KBD_SPLIT 0x08 /* Left side */ +#define OPL3_COMPOSITE_SINE_WAVE_MODE 0x80 /* Don't use with OPL-3? */ +#define OPL3_KEYBOARD_SPLIT 0x40 + +#define OPL3_REG_PERCUSSION 0xbd /* Left side only */ +#define OPL3_TREMOLO_DEPTH 0x80 +#define OPL3_VIBRATO_DEPTH 0x40 +#define OPL3_PERCUSSION_ENABLE 0x20 +#define OPL3_BASSDRUM_ON 0x10 +#define OPL3_SNAREDRUM_ON 0x08 +#define OPL3_TOMTOM_ON 0x04 +#define OPL3_CYMBAL_ON 0x02 +#define OPL3_HIHAT_ON 0x01 + +/* + * Offsets to the register banks for operators. To get the + * register number just add the operator offset to the bank offset + * + * AM/VIB/EG/KSR/Multiple (0x20 to 0x35) + */ +#define OPL3_REG_AM_VIB 0x20 +#define OPL3_TREMOLO_ON 0x80 +#define OPL3_VIBRATO_ON 0x40 +#define OPL3_SUSTAIN_ON 0x20 +#define OPL3_KSR 0x10 /* Key scaling rate */ +#define OPL3_MULTIPLE_MASK 0x0f /* Frequency multiplier */ + + /* + * KSL/Total level (0x40 to 0x55) + */ +#define OPL3_REG_KSL_LEVEL 0x40 +#define OPL3_KSL_MASK 0xc0 /* Envelope scaling bits */ +#define OPL3_TOTAL_LEVEL_MASK 0x3f /* Strength (volume) of OP */ + +/* + * Attack / Decay rate (0x60 to 0x75) + */ +#define OPL3_REG_ATTACK_DECAY 0x60 +#define OPL3_ATTACK_MASK 0xf0 +#define OPL3_DECAY_MASK 0x0f + +/* + * Sustain level / Release rate (0x80 to 0x95) + */ +#define OPL3_REG_SUSTAIN_RELEASE 0x80 +#define OPL3_SUSTAIN_MASK 0xf0 +#define OPL3_RELEASE_MASK 0x0f + +/* + * Wave select (0xE0 to 0xF5) + */ +#define OPL3_REG_WAVE_SELECT 0xe0 +#define OPL3_WAVE_SELECT_MASK 0x07 + +/* + * Offsets to the register banks for voices. Just add to the + * voice number to get the register number. + * + * F-Number low bits (0xA0 to 0xA8). + */ +#define OPL3_REG_FNUM_LOW 0xa0 + +/* + * F-number high bits / Key on / Block (octave) (0xB0 to 0xB8) + */ +#define OPL3_REG_KEYON_BLOCK 0xb0 +#define OPL3_KEYON_BIT 0x20 +#define OPL3_BLOCKNUM_MASK 0x1c +#define OPL3_FNUM_HIGH_MASK 0x03 + +/* + * Feedback / Connection (0xc0 to 0xc8) + * + * These registers have two new bits when the OPL-3 mode + * is selected. These bits controls connecting the voice + * to the stereo channels. For 4 OP voices this bit is + * defined in the second half of the voice (add 3 to the + * register offset). + * + * For 4 OP voices the connection bit is used in the + * both halves (gives 4 ways to connect the operators). + */ +#define OPL3_REG_FEEDBACK_CONNECTION 0xc0 +#define OPL3_FEEDBACK_MASK 0x0e /* Valid just for 1st OP of a voice */ +#define OPL3_CONNECTION_BIT 0x01 +/* + * In the 4 OP mode there is four possible configurations how the + * operators can be connected together (in 2 OP modes there is just + * AM or FM). The 4 OP connection mode is defined by the rightmost + * bit of the FEEDBACK_CONNECTION (0xC0-0xC8) on the both halves. + * + * First half Second half Mode + * + * +---+ + * v | + * 0 0 >+-1-+--2--3--4--> + * + * + * + * +---+ + * | | + * 0 1 >+-1-+--2-+ + * |-> + * >--3----4-+ + * + * +---+ + * | | + * 1 0 >+-1-+-----+ + * |-> + * >--2--3--4-+ + * + * +---+ + * | | + * 1 1 >+-1-+--+ + * | + * >--2--3-+-> + * | + * >--4----+ + */ +#define OPL3_STEREO_BITS 0x30 /* OPL-3 only */ +#define OPL3_VOICE_TO_LEFT 0x10 +#define OPL3_VOICE_TO_RIGHT 0x20 + +/* + + */ + +#define OPL3_LEFT 0x0000 +#define OPL3_RIGHT 0x0100 + +#define OPL3_HW_AUTO 0x0000 +#define OPL3_HW_OPL2 0x0200 +#define OPL3_HW_OPL3 0x0300 +#define OPL3_HW_OPL3_SV 0x0301 /* S3 SonicVibes */ +#define OPL3_HW_OPL3_CS 0x0302 /* CS4232/CS4236+ */ +#define OPL3_HW_OPL3_FM801 0x0303 /* FM801 */ +#define OPL3_HW_OPL3_CS4281 0x0304 /* CS4281 */ +#define OPL3_HW_OPL4 0x0400 /* YMF278B/YMF295 */ +#define OPL3_HW_OPL4_ML 0x0401 /* YMF704/YMF721 */ +#define OPL3_HW_MASK 0xff00 + +#define MAX_OPL2_VOICES 9 +#define MAX_OPL3_VOICES 18 + +struct snd_opl3; + +/* + * Instrument record, aka "Patch" + */ + +/* FM operator */ +struct fm_operator { + unsigned char am_vib; + unsigned char ksl_level; + unsigned char attack_decay; + unsigned char sustain_release; + unsigned char wave_select; +} __attribute__((packed)); + +/* Instrument data */ +struct fm_instrument { + struct fm_operator op[4]; + unsigned char feedback_connection[2]; + unsigned char echo_delay; + unsigned char echo_atten; + unsigned char chorus_spread; + unsigned char trnsps; + unsigned char fix_dur; + unsigned char modes; + unsigned char fix_key; +}; + +/* type */ +#define FM_PATCH_OPL2 0x01 /* OPL2 2 operators FM instrument */ +#define FM_PATCH_OPL3 0x02 /* OPL3 4 operators FM instrument */ + +/* Instrument record */ +struct fm_patch { + unsigned char prog; + unsigned char bank; + unsigned char type; + struct fm_instrument inst; + char name[24]; + struct fm_patch *next; +}; + + +/* + * A structure to keep track of each hardware voice + */ +struct snd_opl3_voice { + int state; /* status */ +#define SNDRV_OPL3_ST_OFF 0 /* Not playing */ +#define SNDRV_OPL3_ST_ON_2OP 1 /* 2op voice is allocated */ +#define SNDRV_OPL3_ST_ON_4OP 2 /* 4op voice is allocated */ +#define SNDRV_OPL3_ST_NOT_AVAIL -1 /* voice is not available */ + + unsigned int time; /* An allocation time */ + unsigned char note; /* Note currently assigned to this voice */ + + unsigned long note_off; /* note-off time */ + int note_off_check; /* check note-off time */ + + unsigned char keyon_reg; /* KON register shadow */ + + struct snd_midi_channel *chan; /* Midi channel for this note */ +}; + +struct snd_opl3 { + unsigned long l_port; + unsigned long r_port; + struct resource *res_l_port; + struct resource *res_r_port; + unsigned short hardware; + /* hardware access */ + void (*command) (struct snd_opl3 * opl3, unsigned short cmd, unsigned char val); + unsigned short timer_enable; + int seq_dev_num; /* sequencer device number */ + struct snd_timer *timer1; + struct snd_timer *timer2; + spinlock_t timer_lock; + + void *private_data; + void (*private_free)(struct snd_opl3 *); + + struct snd_hwdep *hwdep; + spinlock_t reg_lock; + struct snd_card *card; /* The card that this belongs to */ + unsigned char fm_mode; /* OPL mode, see SNDRV_DM_FM_MODE_XXX */ + unsigned char rhythm; /* percussion mode flag */ + unsigned char max_voices; /* max number of voices */ +#if IS_ENABLED(CONFIG_SND_SEQUENCER) +#define SNDRV_OPL3_MODE_SYNTH 0 /* OSS - voices allocated by application */ +#define SNDRV_OPL3_MODE_SEQ 1 /* ALSA - driver handles voice allocation */ + int synth_mode; /* synth mode */ + int seq_client; + + struct snd_seq_device *seq_dev; /* sequencer device */ + struct snd_midi_channel_set * chset; + +#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS) + struct snd_seq_device *oss_seq_dev; /* OSS sequencer device */ + struct snd_midi_channel_set * oss_chset; +#endif + +#define OPL3_PATCH_HASH_SIZE 32 + struct fm_patch *patch_table[OPL3_PATCH_HASH_SIZE]; + + struct snd_opl3_voice voices[MAX_OPL3_VOICES]; /* Voices (OPL3 'channel') */ + int use_time; /* allocation counter */ + + unsigned short connection_reg; /* connection reg shadow */ + unsigned char drum_reg; /* percussion reg shadow */ + + spinlock_t voice_lock; /* Lock for voice access */ + + struct timer_list tlist; /* timer for note-offs and effects */ + int sys_timer_status; /* system timer run status */ + spinlock_t sys_timer_lock; /* Lock for system timer access */ +#endif +}; + +/* opl3.c */ +void snd_opl3_interrupt(struct snd_hwdep * hw); +int snd_opl3_new(struct snd_card *card, unsigned short hardware, + struct snd_opl3 **ropl3); +int snd_opl3_init(struct snd_opl3 *opl3); +int snd_opl3_create(struct snd_card *card, + unsigned long l_port, unsigned long r_port, + unsigned short hardware, + int integrated, + struct snd_opl3 ** opl3); +int snd_opl3_timer_new(struct snd_opl3 * opl3, int timer1_dev, int timer2_dev); +int snd_opl3_hwdep_new(struct snd_opl3 * opl3, int device, int seq_device, + struct snd_hwdep ** rhwdep); + +/* opl3_synth */ +int snd_opl3_open(struct snd_hwdep * hw, struct file *file); +int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file, + unsigned int cmd, unsigned long arg); +int snd_opl3_release(struct snd_hwdep * hw, struct file *file); + +void snd_opl3_reset(struct snd_opl3 * opl3); + +#if IS_ENABLED(CONFIG_SND_SEQUENCER) +long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count, + loff_t *offset); +int snd_opl3_load_patch(struct snd_opl3 *opl3, + int prog, int bank, int type, + const char *name, + const unsigned char *ext, + const unsigned char *data); +struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank, + int create_patch); +void snd_opl3_clear_patches(struct snd_opl3 *opl3); +#else +#define snd_opl3_write NULL +static inline void snd_opl3_clear_patches(struct snd_opl3 *opl3) {} +#endif + +#endif /* __SOUND_OPL3_H */ |