sound/isa/gus/gus_synth.c - kernel/msm - Gitiles

 /*
  *  Routines for Gravis UltraSound soundcards - Synthesizer
  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
  *
  *
  *   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 <sound/driver.h>
 #include <linux/init.h>
 #include <linux/time.h>
 #include <sound/core.h>
 #include <sound/gus.h>
 #include <sound/seq_device.h>

 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
 MODULE_DESCRIPTION("Routines for Gravis UltraSound soundcards - Synthesizer");
 MODULE_LICENSE("GPL");

 /*
  *
  */

 static void snd_gus_synth_free_voices(snd_gus_card_t * gus, int client, int port)
 {
 	int idx;
 	snd_gus_voice_t * voice;

 	for (idx = 0; idx < 32; idx++) {
 		voice = &gus->gf1.voices[idx];
 		if (voice->use && voice->client == client && voice->port == port)
 			snd_gf1_free_voice(gus, voice);
 	}
 }

 static int snd_gus_synth_use(void *private_data, snd_seq_port_subscribe_t *info)
 {
 	snd_gus_port_t * port = (snd_gus_port_t *)private_data;
 	snd_gus_card_t * gus = port->gus;
 	snd_gus_voice_t * voice;
 	unsigned int idx;

 	if (info->voices > 32)
 		return -EINVAL;
 	down(&gus->register_mutex);
 	if (!snd_gus_use_inc(gus)) {
 		up(&gus->register_mutex);
 		return -EFAULT;
 	}
 	for (idx = 0; idx < info->voices; idx++) {
 		voice = snd_gf1_alloc_voice(gus, SNDRV_GF1_VOICE_TYPE_SYNTH, info->sender.client, info->sender.port);
 		if (voice == NULL) {
 			snd_gus_synth_free_voices(gus, info->sender.client, info->sender.port);
 			snd_gus_use_dec(gus);
 			up(&gus->register_mutex);
 			return -EBUSY;
 		}
 		voice->index = idx;
 	}
 	up(&gus->register_mutex);
 	return 0;
 }

 static int snd_gus_synth_unuse(void *private_data, snd_seq_port_subscribe_t *info)
 {
 	snd_gus_port_t * port = (snd_gus_port_t *)private_data;
 	snd_gus_card_t * gus = port->gus;

 	down(&gus->register_mutex);
 	snd_gus_synth_free_voices(gus, info->sender.client, info->sender.port);
 	snd_gus_use_dec(gus);
 	up(&gus->register_mutex);
 	return 0;
 }

 /*
  *
  */

 static void snd_gus_synth_free_private_instruments(snd_gus_port_t *p, int client)
 {
 	snd_seq_instr_header_t ifree;

 	memset(&ifree, 0, sizeof(ifree));
 	ifree.cmd = SNDRV_SEQ_INSTR_FREE_CMD_PRIVATE;
 	snd_seq_instr_list_free_cond(p->gus->gf1.ilist, &ifree, client, 0);
 }

 static int snd_gus_synth_event_input(snd_seq_event_t *ev, int direct,
 				     void *private_data, int atomic, int hop)
 {
 	snd_gus_port_t * p = (snd_gus_port_t *) private_data;

 	snd_assert(p != NULL, return -EINVAL);
 	if (ev->type >= SNDRV_SEQ_EVENT_SAMPLE &&
 	    ev->type <= SNDRV_SEQ_EVENT_SAMPLE_PRIVATE1) {
 		snd_gus_sample_event(ev, p);
 		return 0;
 	}
 	if (ev->source.client == SNDRV_SEQ_CLIENT_SYSTEM &&
 	    ev->source.port == SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE) {
 		if (ev->type == SNDRV_SEQ_EVENT_CLIENT_EXIT) {
 			snd_gus_synth_free_private_instruments(p, ev->data.addr.client);
 			return 0;
 		}
 	}
 	if (direct) {
 		if (ev->type >= SNDRV_SEQ_EVENT_INSTR_BEGIN) {
 			snd_seq_instr_event(&p->gus->gf1.iwffff_ops.kops,
 					    p->gus->gf1.ilist,
 					    ev,
 					    p->gus->gf1.seq_client,
 					    atomic, hop);
 			return 0;
 		}
 	}
 	return 0;
 }

 static void snd_gus_synth_instr_notify(void *private_data,
 				       snd_seq_kinstr_t *instr,
 				       int what)
 {
 	unsigned int idx;
 	snd_gus_card_t *gus = private_data;
 	snd_gus_voice_t *pvoice;
 	unsigned long flags;

 	spin_lock_irqsave(&gus->event_lock, flags);
 	for (idx = 0; idx < 32; idx++) {
 		pvoice = &gus->gf1.voices[idx];
 		if (pvoice->use && !memcmp(&pvoice->instr, &instr->instr, sizeof(pvoice->instr))) {
 			if (pvoice->sample_ops && pvoice->sample_ops->sample_stop) {
 				pvoice->sample_ops->sample_stop(gus, pvoice, SAMPLE_STOP_IMMEDIATELY);
 			} else {
 				snd_gf1_stop_voice(gus, pvoice->number);
 				pvoice->flags &= ~SNDRV_GF1_VFLG_RUNNING;
 			}
 		}
 	}
 	spin_unlock_irqrestore(&gus->event_lock, flags);
 }

 /*
  *
  */

 static void snd_gus_synth_free_port(void *private_data)
 {
 	snd_gus_port_t * p = (snd_gus_port_t *)private_data;

 	if (p)
 		snd_midi_channel_free_set(p->chset);
 }

 static int snd_gus_synth_create_port(snd_gus_card_t * gus, int idx)
 {
 	snd_gus_port_t * p;
 	snd_seq_port_callback_t callbacks;
 	char name[32];
 	int result;

 	p = &gus->gf1.seq_ports[idx];
 	p->chset = snd_midi_channel_alloc_set(16);
 	if (p->chset == NULL)
 		return -ENOMEM;
 	p->chset->private_data = p;
 	p->gus = gus;
 	p->client = gus->gf1.seq_client;

 	memset(&callbacks, 0, sizeof(callbacks));
 	callbacks.owner = THIS_MODULE;
 	callbacks.use = snd_gus_synth_use;
 	callbacks.unuse = snd_gus_synth_unuse;
 	callbacks.event_input = snd_gus_synth_event_input;
 	callbacks.private_free = snd_gus_synth_free_port;
 	callbacks.private_data = p;

 	sprintf(name, "%s port %i", gus->interwave ? "AMD InterWave" : "GF1", idx);
 	p->chset->port = snd_seq_event_port_attach(gus->gf1.seq_client,
 						   &callbacks,
 						   SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
 						   SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE |
 						   SNDRV_SEQ_PORT_TYPE_SYNTH,
 						   16, 0,
 						   name);
 	if (p->chset->port < 0) {
 		result = p->chset->port;
 		snd_gus_synth_free_port(p);
 		return result;
 	}
 	p->port = p->chset->port;
 	return 0;
 }

 /*
  *
  */

 static int snd_gus_synth_new_device(snd_seq_device_t *dev)
 {
 	snd_gus_card_t *gus;
 	int client, i;
 	snd_seq_client_callback_t callbacks;
 	snd_seq_client_info_t *cinfo;
 	snd_seq_port_subscribe_t sub;
 	snd_iwffff_ops_t *iwops;
 	snd_gf1_ops_t *gf1ops;
 	snd_simple_ops_t *simpleops;

 	gus = *(snd_gus_card_t**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 	if (gus == NULL)
 		return -EINVAL;

 	init_MUTEX(&gus->register_mutex);
 	gus->gf1.seq_client = -1;

 	cinfo = kmalloc(sizeof(*cinfo), GFP_KERNEL);
 	if (! cinfo)
 		return -ENOMEM;

 	/* allocate new client */
 	memset(&callbacks, 0, sizeof(callbacks));
 	callbacks.private_data = gus;
 	callbacks.allow_output = callbacks.allow_input = 1;
 	client = gus->gf1.seq_client =
 			snd_seq_create_kernel_client(gus->card, 1, &callbacks);
 	if (client < 0) {
 		kfree(cinfo);
 		return client;
 	}

 	/* change name of client */
 	memset(cinfo, 0, sizeof(*cinfo));
 	cinfo->client = client;
 	cinfo->type = KERNEL_CLIENT;
 	sprintf(cinfo->name, gus->interwave ? "AMD InterWave" : "GF1");
 	snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, cinfo);
 	kfree(cinfo);

 	for (i = 0; i < 4; i++)
 		snd_gus_synth_create_port(gus, i);

 	gus->gf1.ilist = snd_seq_instr_list_new();
 	if (gus->gf1.ilist == NULL) {
 		snd_seq_delete_kernel_client(client);
 		gus->gf1.seq_client = -1;
 		return -ENOMEM;
 	}
 	gus->gf1.ilist->flags = SNDRV_SEQ_INSTR_FLG_DIRECT;

 	simpleops = &gus->gf1.simple_ops;
 	snd_seq_simple_init(simpleops, gus, NULL);
 	simpleops->put_sample = snd_gus_simple_put_sample;
 	simpleops->get_sample = snd_gus_simple_get_sample;
 	simpleops->remove_sample = snd_gus_simple_remove_sample;
 	simpleops->notify = snd_gus_synth_instr_notify;

 	gf1ops = &gus->gf1.gf1_ops;
 	snd_seq_gf1_init(gf1ops, gus, &simpleops->kops);
 	gf1ops->put_sample = snd_gus_gf1_put_sample;
 	gf1ops->get_sample = snd_gus_gf1_get_sample;
 	gf1ops->remove_sample = snd_gus_gf1_remove_sample;
 	gf1ops->notify = snd_gus_synth_instr_notify;

 	iwops = &gus->gf1.iwffff_ops;
 	snd_seq_iwffff_init(iwops, gus, &gf1ops->kops);
 	iwops->put_sample = snd_gus_iwffff_put_sample;
 	iwops->get_sample = snd_gus_iwffff_get_sample;
 	iwops->remove_sample = snd_gus_iwffff_remove_sample;
 	iwops->notify = snd_gus_synth_instr_notify;

 	memset(&sub, 0, sizeof(sub));
 	sub.sender.client = SNDRV_SEQ_CLIENT_SYSTEM;
 	sub.sender.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
 	sub.dest.client = client;
 	sub.dest.port = 0;
 	snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &sub);

 	return 0;
 }

 static int snd_gus_synth_delete_device(snd_seq_device_t *dev)
 {
 	snd_gus_card_t *gus;

 	gus = *(snd_gus_card_t**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 	if (gus == NULL)
 		return -EINVAL;

 	if (gus->gf1.seq_client >= 0) {
 		snd_seq_delete_kernel_client(gus->gf1.seq_client);
 		gus->gf1.seq_client = -1;
 	}
 	if (gus->gf1.ilist)
 		snd_seq_instr_list_free(&gus->gf1.ilist);
 	return 0;
 }

 static int __init alsa_gus_synth_init(void)
 {
 	static snd_seq_dev_ops_t ops = {
 		snd_gus_synth_new_device,
 		snd_gus_synth_delete_device
 	};

 	return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_GUS, &ops,
 					      sizeof(snd_gus_card_t*));
 }

 static void __exit alsa_gus_synth_exit(void)
 {
 	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_GUS);
 }

 module_init(alsa_gus_synth_init)
 module_exit(alsa_gus_synth_exit)
	/*
	* Routines for Gravis UltraSound soundcards - Synthesizer
	* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
	*
	*
	* 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 <sound/driver.h>
	#include <linux/init.h>
	#include <linux/time.h>
	#include <sound/core.h>
	#include <sound/gus.h>
	#include <sound/seq_device.h>

	MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
	MODULE_DESCRIPTION("Routines for Gravis UltraSound soundcards - Synthesizer");
	MODULE_LICENSE("GPL");

	/*
	*
	*/

	static void snd_gus_synth_free_voices(snd_gus_card_t * gus, int client, int port)
	{
	int idx;
	snd_gus_voice_t * voice;

	for (idx = 0; idx < 32; idx++) {
	voice = &gus->gf1.voices[idx];
	if (voice->use && voice->client == client && voice->port == port)
	snd_gf1_free_voice(gus, voice);
	}
	}

	static int snd_gus_synth_use(void private_data, snd_seq_port_subscribe_t info)
	{
	snd_gus_port_t * port = (snd_gus_port_t *)private_data;
	snd_gus_card_t * gus = port->gus;
	snd_gus_voice_t * voice;
	unsigned int idx;

	if (info->voices > 32)
	return -EINVAL;
	down(&gus->register_mutex);
	if (!snd_gus_use_inc(gus)) {
	up(&gus->register_mutex);
	return -EFAULT;
	}
	for (idx = 0; idx < info->voices; idx++) {
	voice = snd_gf1_alloc_voice(gus, SNDRV_GF1_VOICE_TYPE_SYNTH, info->sender.client, info->sender.port);
	if (voice == NULL) {
	snd_gus_synth_free_voices(gus, info->sender.client, info->sender.port);
	snd_gus_use_dec(gus);
	up(&gus->register_mutex);
	return -EBUSY;
	}
	voice->index = idx;
	}
	up(&gus->register_mutex);
	return 0;
	}

	static int snd_gus_synth_unuse(void private_data, snd_seq_port_subscribe_t info)
	{
	snd_gus_port_t * port = (snd_gus_port_t *)private_data;
	snd_gus_card_t * gus = port->gus;

	down(&gus->register_mutex);
	snd_gus_synth_free_voices(gus, info->sender.client, info->sender.port);
	snd_gus_use_dec(gus);
	up(&gus->register_mutex);
	return 0;
	}

	/*
	*
	*/

	static void snd_gus_synth_free_private_instruments(snd_gus_port_t *p, int client)
	{
	snd_seq_instr_header_t ifree;

	memset(&ifree, 0, sizeof(ifree));
	ifree.cmd = SNDRV_SEQ_INSTR_FREE_CMD_PRIVATE;
	snd_seq_instr_list_free_cond(p->gus->gf1.ilist, &ifree, client, 0);
	}

	static int snd_gus_synth_event_input(snd_seq_event_t *ev, int direct,
	void *private_data, int atomic, int hop)
	{
	snd_gus_port_t * p = (snd_gus_port_t *) private_data;

	snd_assert(p != NULL, return -EINVAL);
	if (ev->type >= SNDRV_SEQ_EVENT_SAMPLE &&
	ev->type <= SNDRV_SEQ_EVENT_SAMPLE_PRIVATE1) {
	snd_gus_sample_event(ev, p);
	return 0;
	}
	if (ev->source.client == SNDRV_SEQ_CLIENT_SYSTEM &&
	ev->source.port == SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE) {
	if (ev->type == SNDRV_SEQ_EVENT_CLIENT_EXIT) {
	snd_gus_synth_free_private_instruments(p, ev->data.addr.client);
	return 0;
	}
	}
	if (direct) {
	if (ev->type >= SNDRV_SEQ_EVENT_INSTR_BEGIN) {
	snd_seq_instr_event(&p->gus->gf1.iwffff_ops.kops,
	p->gus->gf1.ilist,
	ev,
	p->gus->gf1.seq_client,
	atomic, hop);
	return 0;
	}
	}
	return 0;
	}

	static void snd_gus_synth_instr_notify(void *private_data,
	snd_seq_kinstr_t *instr,
	int what)
	{
	unsigned int idx;
	snd_gus_card_t *gus = private_data;
	snd_gus_voice_t *pvoice;
	unsigned long flags;

	spin_lock_irqsave(&gus->event_lock, flags);
	for (idx = 0; idx < 32; idx++) {
	pvoice = &gus->gf1.voices[idx];
	if (pvoice->use && !memcmp(&pvoice->instr, &instr->instr, sizeof(pvoice->instr))) {
	if (pvoice->sample_ops && pvoice->sample_ops->sample_stop) {
	pvoice->sample_ops->sample_stop(gus, pvoice, SAMPLE_STOP_IMMEDIATELY);
	} else {
	snd_gf1_stop_voice(gus, pvoice->number);
	pvoice->flags &= ~SNDRV_GF1_VFLG_RUNNING;
	}
	}
	}
	spin_unlock_irqrestore(&gus->event_lock, flags);
	}

	/*
	*
	*/

	static void snd_gus_synth_free_port(void *private_data)
	{
	snd_gus_port_t * p = (snd_gus_port_t *)private_data;

	if (p)
	snd_midi_channel_free_set(p->chset);
	}

	static int snd_gus_synth_create_port(snd_gus_card_t * gus, int idx)
	{
	snd_gus_port_t * p;
	snd_seq_port_callback_t callbacks;
	char name[32];
	int result;

	p = &gus->gf1.seq_ports[idx];
	p->chset = snd_midi_channel_alloc_set(16);
	if (p->chset == NULL)
	return -ENOMEM;
	p->chset->private_data = p;
	p->gus = gus;
	p->client = gus->gf1.seq_client;

	memset(&callbacks, 0, sizeof(callbacks));
	callbacks.owner = THIS_MODULE;
	callbacks.use = snd_gus_synth_use;
	callbacks.unuse = snd_gus_synth_unuse;
	callbacks.event_input = snd_gus_synth_event_input;
	callbacks.private_free = snd_gus_synth_free_port;
	callbacks.private_data = p;

	sprintf(name, "%s port %i", gus->interwave ? "AMD InterWave" : "GF1", idx);
	p->chset->port = snd_seq_event_port_attach(gus->gf1.seq_client,
	&callbacks,
	SNDRV_SEQ_PORT_CAP_WRITE \| SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
	SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE \|
	SNDRV_SEQ_PORT_TYPE_SYNTH,
	16, 0,
	name);
	if (p->chset->port < 0) {
	result = p->chset->port;
	snd_gus_synth_free_port(p);
	return result;
	}
	p->port = p->chset->port;
	return 0;
	}

	/*
	*
	*/

	static int snd_gus_synth_new_device(snd_seq_device_t *dev)
	{
	snd_gus_card_t *gus;
	int client, i;
	snd_seq_client_callback_t callbacks;
	snd_seq_client_info_t *cinfo;
	snd_seq_port_subscribe_t sub;
	snd_iwffff_ops_t *iwops;
	snd_gf1_ops_t *gf1ops;
	snd_simple_ops_t *simpleops;

	gus = (snd_gus_card_t*)SNDRV_SEQ_DEVICE_ARGPTR(dev);
	if (gus == NULL)
	return -EINVAL;

	init_MUTEX(&gus->register_mutex);
	gus->gf1.seq_client = -1;

	cinfo = kmalloc(sizeof(*cinfo), GFP_KERNEL);
	if (! cinfo)
	return -ENOMEM;

	/* allocate new client */
	memset(&callbacks, 0, sizeof(callbacks));
	callbacks.private_data = gus;
	callbacks.allow_output = callbacks.allow_input = 1;
	client = gus->gf1.seq_client =
	snd_seq_create_kernel_client(gus->card, 1, &callbacks);
	if (client < 0) {
	kfree(cinfo);
	return client;
	}

	/* change name of client */
	memset(cinfo, 0, sizeof(*cinfo));
	cinfo->client = client;
	cinfo->type = KERNEL_CLIENT;
	sprintf(cinfo->name, gus->interwave ? "AMD InterWave" : "GF1");
	snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, cinfo);
	kfree(cinfo);

	for (i = 0; i < 4; i++)
	snd_gus_synth_create_port(gus, i);

	gus->gf1.ilist = snd_seq_instr_list_new();
	if (gus->gf1.ilist == NULL) {
	snd_seq_delete_kernel_client(client);
	gus->gf1.seq_client = -1;
	return -ENOMEM;
	}
	gus->gf1.ilist->flags = SNDRV_SEQ_INSTR_FLG_DIRECT;

	simpleops = &gus->gf1.simple_ops;
	snd_seq_simple_init(simpleops, gus, NULL);
	simpleops->put_sample = snd_gus_simple_put_sample;
	simpleops->get_sample = snd_gus_simple_get_sample;
	simpleops->remove_sample = snd_gus_simple_remove_sample;
	simpleops->notify = snd_gus_synth_instr_notify;

	gf1ops = &gus->gf1.gf1_ops;
	snd_seq_gf1_init(gf1ops, gus, &simpleops->kops);
	gf1ops->put_sample = snd_gus_gf1_put_sample;
	gf1ops->get_sample = snd_gus_gf1_get_sample;
	gf1ops->remove_sample = snd_gus_gf1_remove_sample;
	gf1ops->notify = snd_gus_synth_instr_notify;

	iwops = &gus->gf1.iwffff_ops;
	snd_seq_iwffff_init(iwops, gus, &gf1ops->kops);
	iwops->put_sample = snd_gus_iwffff_put_sample;
	iwops->get_sample = snd_gus_iwffff_get_sample;
	iwops->remove_sample = snd_gus_iwffff_remove_sample;
	iwops->notify = snd_gus_synth_instr_notify;

	memset(&sub, 0, sizeof(sub));
	sub.sender.client = SNDRV_SEQ_CLIENT_SYSTEM;
	sub.sender.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
	sub.dest.client = client;
	sub.dest.port = 0;
	snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &sub);

	return 0;
	}

	static int snd_gus_synth_delete_device(snd_seq_device_t *dev)
	{
	snd_gus_card_t *gus;

	gus = (snd_gus_card_t*)SNDRV_SEQ_DEVICE_ARGPTR(dev);
	if (gus == NULL)
	return -EINVAL;

	if (gus->gf1.seq_client >= 0) {
	snd_seq_delete_kernel_client(gus->gf1.seq_client);
	gus->gf1.seq_client = -1;
	}
	if (gus->gf1.ilist)
	snd_seq_instr_list_free(&gus->gf1.ilist);
	return 0;
	}

	static int __init alsa_gus_synth_init(void)
	{
	static snd_seq_dev_ops_t ops = {
	snd_gus_synth_new_device,
	snd_gus_synth_delete_device
	};

	return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_GUS, &ops,
	sizeof(snd_gus_card_t*));
	}

	static void __exit alsa_gus_synth_exit(void)
	{
	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_GUS);
	}

	module_init(alsa_gus_synth_init)
	module_exit(alsa_gus_synth_exit)