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opl3.h
/* 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; } __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 */
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