mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
276 lines
6.7 KiB
276 lines
6.7 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Copyright (c) by Uros Bizjak <[email protected]> |
|
* |
|
* Midi Sequencer interface routines for OPL2/OPL3/OPL4 FM |
|
* |
|
* OPL2/3 FM instrument loader: |
|
* alsa-tools/seq/sbiload/ |
|
*/ |
|
|
|
#include "opl3_voice.h" |
|
#include <linux/init.h> |
|
#include <linux/moduleparam.h> |
|
#include <linux/module.h> |
|
#include <sound/initval.h> |
|
|
|
MODULE_AUTHOR("Uros Bizjak <[email protected]>"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth"); |
|
|
|
bool use_internal_drums = 0; |
|
module_param(use_internal_drums, bool, 0444); |
|
MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums."); |
|
|
|
int snd_opl3_synth_use_inc(struct snd_opl3 * opl3) |
|
{ |
|
if (!try_module_get(opl3->card->module)) |
|
return -EFAULT; |
|
return 0; |
|
|
|
} |
|
|
|
void snd_opl3_synth_use_dec(struct snd_opl3 * opl3) |
|
{ |
|
module_put(opl3->card->module); |
|
} |
|
|
|
int snd_opl3_synth_setup(struct snd_opl3 * opl3) |
|
{ |
|
int idx; |
|
struct snd_hwdep *hwdep = opl3->hwdep; |
|
|
|
mutex_lock(&hwdep->open_mutex); |
|
if (hwdep->used) { |
|
mutex_unlock(&hwdep->open_mutex); |
|
return -EBUSY; |
|
} |
|
hwdep->used++; |
|
mutex_unlock(&hwdep->open_mutex); |
|
|
|
snd_opl3_reset(opl3); |
|
|
|
for (idx = 0; idx < MAX_OPL3_VOICES; idx++) { |
|
opl3->voices[idx].state = SNDRV_OPL3_ST_OFF; |
|
opl3->voices[idx].time = 0; |
|
opl3->voices[idx].keyon_reg = 0x00; |
|
} |
|
opl3->use_time = 0; |
|
opl3->connection_reg = 0x00; |
|
if (opl3->hardware >= OPL3_HW_OPL3) { |
|
/* Clear 4-op connections */ |
|
opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, |
|
opl3->connection_reg); |
|
opl3->max_voices = MAX_OPL3_VOICES; |
|
} |
|
return 0; |
|
} |
|
|
|
void snd_opl3_synth_cleanup(struct snd_opl3 * opl3) |
|
{ |
|
unsigned long flags; |
|
struct snd_hwdep *hwdep; |
|
|
|
/* Stop system timer */ |
|
spin_lock_irqsave(&opl3->sys_timer_lock, flags); |
|
if (opl3->sys_timer_status) { |
|
del_timer(&opl3->tlist); |
|
opl3->sys_timer_status = 0; |
|
} |
|
spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); |
|
|
|
snd_opl3_reset(opl3); |
|
hwdep = opl3->hwdep; |
|
mutex_lock(&hwdep->open_mutex); |
|
hwdep->used--; |
|
mutex_unlock(&hwdep->open_mutex); |
|
wake_up(&hwdep->open_wait); |
|
} |
|
|
|
static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info) |
|
{ |
|
struct snd_opl3 *opl3 = private_data; |
|
int err; |
|
|
|
if ((err = snd_opl3_synth_setup(opl3)) < 0) |
|
return err; |
|
|
|
if (use_internal_drums) { |
|
/* Percussion mode */ |
|
opl3->voices[6].state = opl3->voices[7].state = |
|
opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL; |
|
snd_opl3_load_drums(opl3); |
|
opl3->drum_reg = OPL3_PERCUSSION_ENABLE; |
|
opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg); |
|
} else { |
|
opl3->drum_reg = 0x00; |
|
} |
|
|
|
if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) { |
|
if ((err = snd_opl3_synth_use_inc(opl3)) < 0) |
|
return err; |
|
} |
|
opl3->synth_mode = SNDRV_OPL3_MODE_SEQ; |
|
return 0; |
|
} |
|
|
|
static int snd_opl3_synth_unuse(void *private_data, struct snd_seq_port_subscribe * info) |
|
{ |
|
struct snd_opl3 *opl3 = private_data; |
|
|
|
snd_opl3_synth_cleanup(opl3); |
|
|
|
if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) |
|
snd_opl3_synth_use_dec(opl3); |
|
return 0; |
|
} |
|
|
|
/* |
|
* MIDI emulation operators |
|
*/ |
|
const struct snd_midi_op opl3_ops = { |
|
.note_on = snd_opl3_note_on, |
|
.note_off = snd_opl3_note_off, |
|
.key_press = snd_opl3_key_press, |
|
.note_terminate = snd_opl3_terminate_note, |
|
.control = snd_opl3_control, |
|
.nrpn = snd_opl3_nrpn, |
|
.sysex = snd_opl3_sysex, |
|
}; |
|
|
|
static int snd_opl3_synth_event_input(struct snd_seq_event * ev, int direct, |
|
void *private_data, int atomic, int hop) |
|
{ |
|
struct snd_opl3 *opl3 = private_data; |
|
|
|
snd_midi_process_event(&opl3_ops, ev, opl3->chset); |
|
return 0; |
|
} |
|
|
|
/* ------------------------------ */ |
|
|
|
static void snd_opl3_synth_free_port(void *private_data) |
|
{ |
|
struct snd_opl3 *opl3 = private_data; |
|
|
|
snd_midi_channel_free_set(opl3->chset); |
|
} |
|
|
|
static int snd_opl3_synth_create_port(struct snd_opl3 * opl3) |
|
{ |
|
struct snd_seq_port_callback callbacks; |
|
char name[32]; |
|
int voices, opl_ver; |
|
|
|
voices = (opl3->hardware < OPL3_HW_OPL3) ? |
|
MAX_OPL2_VOICES : MAX_OPL3_VOICES; |
|
opl3->chset = snd_midi_channel_alloc_set(16); |
|
if (opl3->chset == NULL) |
|
return -ENOMEM; |
|
opl3->chset->private_data = opl3; |
|
|
|
memset(&callbacks, 0, sizeof(callbacks)); |
|
callbacks.owner = THIS_MODULE; |
|
callbacks.use = snd_opl3_synth_use; |
|
callbacks.unuse = snd_opl3_synth_unuse; |
|
callbacks.event_input = snd_opl3_synth_event_input; |
|
callbacks.private_free = snd_opl3_synth_free_port; |
|
callbacks.private_data = opl3; |
|
|
|
opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8; |
|
sprintf(name, "OPL%i FM Port", opl_ver); |
|
|
|
opl3->chset->client = opl3->seq_client; |
|
opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks, |
|
SNDRV_SEQ_PORT_CAP_WRITE | |
|
SNDRV_SEQ_PORT_CAP_SUBS_WRITE, |
|
SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | |
|
SNDRV_SEQ_PORT_TYPE_MIDI_GM | |
|
SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE | |
|
SNDRV_SEQ_PORT_TYPE_HARDWARE | |
|
SNDRV_SEQ_PORT_TYPE_SYNTHESIZER, |
|
16, voices, |
|
name); |
|
if (opl3->chset->port < 0) { |
|
int port; |
|
port = opl3->chset->port; |
|
snd_midi_channel_free_set(opl3->chset); |
|
return port; |
|
} |
|
return 0; |
|
} |
|
|
|
/* ------------------------------ */ |
|
|
|
static int snd_opl3_seq_probe(struct device *_dev) |
|
{ |
|
struct snd_seq_device *dev = to_seq_dev(_dev); |
|
struct snd_opl3 *opl3; |
|
int client, err; |
|
char name[32]; |
|
int opl_ver; |
|
|
|
opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev); |
|
if (opl3 == NULL) |
|
return -EINVAL; |
|
|
|
spin_lock_init(&opl3->voice_lock); |
|
|
|
opl3->seq_client = -1; |
|
|
|
/* allocate new client */ |
|
opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8; |
|
sprintf(name, "OPL%i FM synth", opl_ver); |
|
client = opl3->seq_client = |
|
snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num, |
|
name); |
|
if (client < 0) |
|
return client; |
|
|
|
if ((err = snd_opl3_synth_create_port(opl3)) < 0) { |
|
snd_seq_delete_kernel_client(client); |
|
opl3->seq_client = -1; |
|
return err; |
|
} |
|
|
|
/* setup system timer */ |
|
timer_setup(&opl3->tlist, snd_opl3_timer_func, 0); |
|
spin_lock_init(&opl3->sys_timer_lock); |
|
opl3->sys_timer_status = 0; |
|
|
|
#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS) |
|
snd_opl3_init_seq_oss(opl3, name); |
|
#endif |
|
return 0; |
|
} |
|
|
|
static int snd_opl3_seq_remove(struct device *_dev) |
|
{ |
|
struct snd_seq_device *dev = to_seq_dev(_dev); |
|
struct snd_opl3 *opl3; |
|
|
|
opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev); |
|
if (opl3 == NULL) |
|
return -EINVAL; |
|
|
|
#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS) |
|
snd_opl3_free_seq_oss(opl3); |
|
#endif |
|
if (opl3->seq_client >= 0) { |
|
snd_seq_delete_kernel_client(opl3->seq_client); |
|
opl3->seq_client = -1; |
|
} |
|
return 0; |
|
} |
|
|
|
static struct snd_seq_driver opl3_seq_driver = { |
|
.driver = { |
|
.name = KBUILD_MODNAME, |
|
.probe = snd_opl3_seq_probe, |
|
.remove = snd_opl3_seq_remove, |
|
}, |
|
.id = SNDRV_SEQ_DEV_ID_OPL3, |
|
.argsize = sizeof(struct snd_opl3 *), |
|
}; |
|
|
|
module_snd_seq_driver(opl3_seq_driver);
|
|
|