306 строки
7.6 KiB
C
306 строки
7.6 KiB
C
/*
|
|
* Copyright (c) by Uros Bizjak <uros@kss-loka.si>
|
|
*
|
|
* Midi Sequencer interface routines for OPL2/OPL3/OPL4 FM
|
|
*
|
|
* OPL2/3 FM instrument loader:
|
|
* alsa-tools/seq/sbiload/
|
|
*
|
|
* 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
|
|
*
|
|
*/
|
|
|
|
#include "opl3_voice.h"
|
|
#include <linux/init.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <sound/initval.h>
|
|
|
|
MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth");
|
|
|
|
int 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;
|
|
|
|
down(&opl3->access_mutex);
|
|
if (opl3->used) {
|
|
up(&opl3->access_mutex);
|
|
return -EBUSY;
|
|
}
|
|
opl3->used++;
|
|
up(&opl3->access_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;
|
|
|
|
/* 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);
|
|
down(&opl3->access_mutex);
|
|
opl3->used--;
|
|
up(&opl3->access_mutex);
|
|
}
|
|
|
|
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
|
|
*/
|
|
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;
|
|
|
|
if (ev->type >= SNDRV_SEQ_EVENT_INSTR_BEGIN &&
|
|
ev->type <= SNDRV_SEQ_EVENT_INSTR_CHANGE) {
|
|
if (direct) {
|
|
snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, ev,
|
|
opl3->seq_client, atomic, hop);
|
|
}
|
|
} else {
|
|
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_SYNTH,
|
|
16, voices,
|
|
name);
|
|
if (opl3->chset->port < 0) {
|
|
snd_midi_channel_free_set(opl3->chset);
|
|
return opl3->chset->port;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* ------------------------------ */
|
|
|
|
static int snd_opl3_seq_new_device(struct snd_seq_device *dev)
|
|
{
|
|
struct snd_opl3 *opl3;
|
|
int client;
|
|
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;
|
|
|
|
snd_opl3_synth_create_port(opl3);
|
|
|
|
/* initialize instrument list */
|
|
opl3->ilist = snd_seq_instr_list_new();
|
|
if (opl3->ilist == NULL) {
|
|
snd_seq_delete_kernel_client(client);
|
|
opl3->seq_client = -1;
|
|
return -ENOMEM;
|
|
}
|
|
opl3->ilist->flags = SNDRV_SEQ_INSTR_FLG_DIRECT;
|
|
snd_seq_fm_init(&opl3->fm_ops, NULL);
|
|
|
|
/* setup system timer */
|
|
init_timer(&opl3->tlist);
|
|
opl3->tlist.function = snd_opl3_timer_func;
|
|
opl3->tlist.data = (unsigned long) opl3;
|
|
spin_lock_init(&opl3->sys_timer_lock);
|
|
opl3->sys_timer_status = 0;
|
|
|
|
#ifdef CONFIG_SND_SEQUENCER_OSS
|
|
snd_opl3_init_seq_oss(opl3, name);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int snd_opl3_seq_delete_device(struct snd_seq_device *dev)
|
|
{
|
|
struct snd_opl3 *opl3;
|
|
|
|
opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
|
|
if (opl3 == NULL)
|
|
return -EINVAL;
|
|
|
|
#ifdef 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;
|
|
}
|
|
if (opl3->ilist)
|
|
snd_seq_instr_list_free(&opl3->ilist);
|
|
return 0;
|
|
}
|
|
|
|
static int __init alsa_opl3_seq_init(void)
|
|
{
|
|
static struct snd_seq_dev_ops ops =
|
|
{
|
|
snd_opl3_seq_new_device,
|
|
snd_opl3_seq_delete_device
|
|
};
|
|
|
|
return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL3, &ops,
|
|
sizeof(struct snd_opl3 *));
|
|
}
|
|
|
|
static void __exit alsa_opl3_seq_exit(void)
|
|
{
|
|
snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL3);
|
|
}
|
|
|
|
module_init(alsa_opl3_seq_init)
|
|
module_exit(alsa_opl3_seq_exit)
|