1 files changed, 290 insertions, 0 deletions
diff --git a/sound/drivers/opl3/opl3_seq.c b/sound/drivers/opl3/opl3_seq.c
new file mode 100644
index 000000000..5f881c4cd
--- /dev/null
+++ b/sound/drivers/opl3/opl3_seq.c
@@ -0,0 +1,290 @@
+/*
+ *  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 <linux/module.h>
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
+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
+ */
+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);