[mirror_ubuntu-bionic-kernel.git] / sound / synth / emux / emux_seq.c

/*
 *  Midi Sequencer interface routines.
 *
 *  Copyright (C) 1999 Steve Ratcliffe
 *  Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
 *
 *   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 "emux_voice.h"
#include <linux/slab.h>
#include <linux/module.h>

/* Prototypes for static functions */
static void free_port(void *private);
static void snd_emux_init_port(struct snd_emux_port *p);
static int snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info);
static int snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info);

/*
 * MIDI emulation operators
 */
static struct snd_midi_op emux_ops = {
	snd_emux_note_on,
	snd_emux_note_off,
	snd_emux_key_press,
	snd_emux_terminate_note,
	snd_emux_control,
	snd_emux_nrpn,
	snd_emux_sysex,
};


/*
 * number of MIDI channels
 */
#define MIDI_CHANNELS		16

/*
 * type flags for MIDI sequencer port
 */
#define DEFAULT_MIDI_TYPE	(SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |\
				 SNDRV_SEQ_PORT_TYPE_MIDI_GM |\
				 SNDRV_SEQ_PORT_TYPE_MIDI_GS |\
				 SNDRV_SEQ_PORT_TYPE_MIDI_XG |\
				 SNDRV_SEQ_PORT_TYPE_HARDWARE |\
				 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)

/*
 * Initialise the EMUX Synth by creating a client and registering
 * a series of ports.
 * Each of the ports will contain the 16 midi channels.  Applications
 * can connect to these ports to play midi data.
 */
int
snd_emux_init_seq(struct snd_emux *emu, struct snd_card *card, int index)
{
	int  i;
	struct snd_seq_port_callback pinfo;
	char tmpname[64];

	emu->client = snd_seq_create_kernel_client(card, index,
						   "%s WaveTable", emu->name);
	if (emu->client < 0) {
		snd_printk(KERN_ERR "can't create client\n");
		return -ENODEV;
	}

	if (emu->num_ports < 0) {
		snd_printk(KERN_WARNING "seqports must be greater than zero\n");
		emu->num_ports = 1;
	} else if (emu->num_ports >= SNDRV_EMUX_MAX_PORTS) {
		snd_printk(KERN_WARNING "too many ports."
			   "limited max. ports %d\n", SNDRV_EMUX_MAX_PORTS);
		emu->num_ports = SNDRV_EMUX_MAX_PORTS;
	}

	memset(&pinfo, 0, sizeof(pinfo));
	pinfo.owner = THIS_MODULE;
	pinfo.use = snd_emux_use;
	pinfo.unuse = snd_emux_unuse;
	pinfo.event_input = snd_emux_event_input;

	for (i = 0; i < emu->num_ports; i++) {
		struct snd_emux_port *p;

		sprintf(tmpname, "%s Port %d", emu->name, i);
		p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS,
					 0, &pinfo);
		if (p == NULL) {
			snd_printk(KERN_ERR "can't create port\n");
			return -ENOMEM;
		}

		p->port_mode =  SNDRV_EMUX_PORT_MODE_MIDI;
		snd_emux_init_port(p);
		emu->ports[i] = p->chset.port;
		emu->portptrs[i] = p;
	}

	return 0;
}


/*
 * Detach from the ports that were set up for this synthesizer and
 * destroy the kernel client.
 */
void
snd_emux_detach_seq(struct snd_emux *emu)
{
	if (emu->voices)
		snd_emux_terminate_all(emu);
		
	if (emu->client >= 0) {
		snd_seq_delete_kernel_client(emu->client);
		emu->client = -1;
	}
}


/*
 * create a sequencer port and channel_set
 */

struct snd_emux_port *
snd_emux_create_port(struct snd_emux *emu, char *name,
		     int max_channels, int oss_port,
		     struct snd_seq_port_callback *callback)
{
	struct snd_emux_port *p;
	int i, type, cap;

	/* Allocate structures for this channel */
	if ((p = kzalloc(sizeof(*p), GFP_KERNEL)) == NULL) {
		snd_printk(KERN_ERR "no memory\n");
		return NULL;
	}
	p->chset.channels = kcalloc(max_channels, sizeof(struct snd_midi_channel), GFP_KERNEL);
	if (p->chset.channels == NULL) {
		snd_printk(KERN_ERR "no memory\n");
		kfree(p);
		return NULL;
	}
	for (i = 0; i < max_channels; i++)
		p->chset.channels[i].number = i;
	p->chset.private_data = p;
	p->chset.max_channels = max_channels;
	p->emu = emu;
	p->chset.client = emu->client;
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
	snd_emux_create_effect(p);
#endif
	callback->private_free = free_port;
	callback->private_data = p;

	cap = SNDRV_SEQ_PORT_CAP_WRITE;
	if (oss_port) {
		type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
	} else {
		type = DEFAULT_MIDI_TYPE;
		cap |= SNDRV_SEQ_PORT_CAP_SUBS_WRITE;
	}

	p->chset.port = snd_seq_event_port_attach(emu->client, callback,
						  cap, type, max_channels,
						  emu->max_voices, name);

	return p;
}


/*
 * release memory block for port
 */
static void
free_port(void *private_data)
{
	struct snd_emux_port *p;

	p = private_data;
	if (p) {
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
		snd_emux_delete_effect(p);
#endif
		kfree(p->chset.channels);
		kfree(p);
	}
}


#define DEFAULT_DRUM_FLAGS	(1<<9)

/*
 * initialize the port specific parameters
 */
static void
snd_emux_init_port(struct snd_emux_port *p)
{
	p->drum_flags = DEFAULT_DRUM_FLAGS;
	p->volume_atten = 0;

	snd_emux_reset_port(p);
}


/*
 * reset port
 */
void
snd_emux_reset_port(struct snd_emux_port *port)
{
	int i;

	/* stop all sounds */
	snd_emux_sounds_off_all(port);

	snd_midi_channel_set_clear(&port->chset);

#ifdef SNDRV_EMUX_USE_RAW_EFFECT
	snd_emux_clear_effect(port);
#endif

	/* set port specific control parameters */
	port->ctrls[EMUX_MD_DEF_BANK] = 0;
	port->ctrls[EMUX_MD_DEF_DRUM] = 0;
	port->ctrls[EMUX_MD_REALTIME_PAN] = 1;

	for (i = 0; i < port->chset.max_channels; i++) {
		struct snd_midi_channel *chan = port->chset.channels + i;
		chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
	}
}


/*
 * input sequencer event
 */
int
snd_emux_event_input(struct snd_seq_event *ev, int direct, void *private_data,
		     int atomic, int hop)
{
	struct snd_emux_port *port;

	port = private_data;
	if (snd_BUG_ON(!port || !ev))
		return -EINVAL;

	snd_midi_process_event(&emux_ops, ev, &port->chset);

	return 0;
}


/*
 * increment usage count
 */
int
snd_emux_inc_count(struct snd_emux *emu)
{
	emu->used++;
	if (!try_module_get(emu->ops.owner))
		goto __error;
	if (!try_module_get(emu->card->module)) {
		module_put(emu->ops.owner);
	      __error:
		emu->used--;
		return 0;
	}
	return 1;
}


/*
 * decrease usage count
 */
void
snd_emux_dec_count(struct snd_emux *emu)
{
	module_put(emu->card->module);
	emu->used--;
	if (emu->used <= 0)
		snd_emux_terminate_all(emu);
	module_put(emu->ops.owner);
}


/*
 * Routine that is called upon a first use of a particular port
 */
static int
snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info)
{
	struct snd_emux_port *p;
	struct snd_emux *emu;

	p = private_data;
	if (snd_BUG_ON(!p))
		return -EINVAL;
	emu = p->emu;
	if (snd_BUG_ON(!emu))
		return -EINVAL;

	mutex_lock(&emu->register_mutex);
	snd_emux_init_port(p);
	snd_emux_inc_count(emu);
	mutex_unlock(&emu->register_mutex);
	return 0;
}

/*
 * Routine that is called upon the last unuse() of a particular port.
 */
static int
snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info)
{
	struct snd_emux_port *p;
	struct snd_emux *emu;

	p = private_data;
	if (snd_BUG_ON(!p))
		return -EINVAL;
	emu = p->emu;
	if (snd_BUG_ON(!emu))
		return -EINVAL;

	mutex_lock(&emu->register_mutex);
	snd_emux_sounds_off_all(p);
	snd_emux_dec_count(emu);
	mutex_unlock(&emu->register_mutex);
	return 0;
}


/*
 * attach virtual rawmidi devices
 */
int snd_emux_init_virmidi(struct snd_emux *emu, struct snd_card *card)
{
	int i;

	emu->vmidi = NULL;
	if (emu->midi_ports <= 0)
		return 0;

	emu->vmidi = kcalloc(emu->midi_ports, sizeof(struct snd_rawmidi *), GFP_KERNEL);
	if (emu->vmidi == NULL)
		return -ENOMEM;

	for (i = 0; i < emu->midi_ports; i++) {
		struct snd_rawmidi *rmidi;
		struct snd_virmidi_dev *rdev;
		if (snd_virmidi_new(card, emu->midi_devidx + i, &rmidi) < 0)
			goto __error;
		rdev = rmidi->private_data;
		sprintf(rmidi->name, "%s Synth MIDI", emu->name);
		rdev->seq_mode = SNDRV_VIRMIDI_SEQ_ATTACH;
		rdev->client = emu->client;
		rdev->port = emu->ports[i];
		if (snd_device_register(card, rmidi) < 0) {
			snd_device_free(card, rmidi);
			goto __error;
		}
		emu->vmidi[i] = rmidi;
		/* snd_printk(KERN_DEBUG "virmidi %d ok\n", i); */
	}
	return 0;

__error:
	/* snd_printk(KERN_DEBUG "error init..\n"); */
	snd_emux_delete_virmidi(emu);
	return -ENOMEM;
}

int snd_emux_delete_virmidi(struct snd_emux *emu)
{
	int i;

	if (emu->vmidi == NULL)
		return 0;

	for (i = 0; i < emu->midi_ports; i++) {
		if (emu->vmidi[i])
			snd_device_free(emu->card, emu->vmidi[i]);
	}
	kfree(emu->vmidi);
	emu->vmidi = NULL;
	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Midi Sequencer interface routines.
	3	*
	4	* Copyright (C) 1999 Steve Ratcliffe
	5	* Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include "emux_voice.h"
	23	#include <linux/slab.h>
da155d5b	24	#include <linux/module.h>
1da177e4 LT	25
	26	/* Prototypes for static functions */
	27	static void free_port(void *private);
03da312a TI	28	static void snd_emux_init_port(struct snd_emux_port *p);
	29	static int snd_emux_use(void private_data, struct snd_seq_port_subscribe info);
	30	static int snd_emux_unuse(void private_data, struct snd_seq_port_subscribe info);
1da177e4 LT	31
	32	/*
	33	* MIDI emulation operators
	34	*/
03da312a	35	static struct snd_midi_op emux_ops = {
1da177e4 LT	36	snd_emux_note_on,
	37	snd_emux_note_off,
	38	snd_emux_key_press,
	39	snd_emux_terminate_note,
	40	snd_emux_control,
	41	snd_emux_nrpn,
	42	snd_emux_sysex,
	43	};
	44
	45
	46	/*
	47	* number of MIDI channels
	48	*/
	49	#define MIDI_CHANNELS 16
	50
	51	/*
	52	* type flags for MIDI sequencer port
	53	*/
	54	#define DEFAULT_MIDI_TYPE (SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC \|\
	55	SNDRV_SEQ_PORT_TYPE_MIDI_GM \|\
	56	SNDRV_SEQ_PORT_TYPE_MIDI_GS \|\
450047a7 CL	57	SNDRV_SEQ_PORT_TYPE_MIDI_XG \|\
	58	SNDRV_SEQ_PORT_TYPE_HARDWARE \|\
	59	SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1da177e4 LT	60
	61	/*
	62	* Initialise the EMUX Synth by creating a client and registering
	63	* a series of ports.
	64	* Each of the ports will contain the 16 midi channels. Applications
	65	* can connect to these ports to play midi data.
	66	*/
	67	int
03da312a	68	snd_emux_init_seq(struct snd_emux emu, struct snd_card card, int index)
1da177e4 LT	69	{
1da177e4 LT	70	int i;
03da312a	71	struct snd_seq_port_callback pinfo;
1da177e4 LT	72	char tmpname[64];
1da177e4 LT	73
7b6d9245 CL	74	emu->client = snd_seq_create_kernel_client(card, index,
7b6d9245 CL	75	"%s WaveTable", emu->name);
1da177e4	76	if (emu->client < 0) {
42b0158b	77	snd_printk(KERN_ERR "can't create client\n");
1da177e4 LT	78	return -ENODEV;
	79	}
	80
	81	if (emu->num_ports < 0) {
42b0158b	82	snd_printk(KERN_WARNING "seqports must be greater than zero\n");
1da177e4 LT	83	emu->num_ports = 1;
1da177e4 LT	84	} else if (emu->num_ports >= SNDRV_EMUX_MAX_PORTS) {
42b0158b	85	snd_printk(KERN_WARNING "too many ports."
1da177e4 LT	86	"limited max. ports %d\n", SNDRV_EMUX_MAX_PORTS);
	87	emu->num_ports = SNDRV_EMUX_MAX_PORTS;
	88	}
	89
	90	memset(&pinfo, 0, sizeof(pinfo));
	91	pinfo.owner = THIS_MODULE;
	92	pinfo.use = snd_emux_use;
	93	pinfo.unuse = snd_emux_unuse;
	94	pinfo.event_input = snd_emux_event_input;
	95
	96	for (i = 0; i < emu->num_ports; i++) {
03da312a	97	struct snd_emux_port *p;
1da177e4 LT	98
	99	sprintf(tmpname, "%s Port %d", emu->name, i);
	100	p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS,
	101	0, &pinfo);
	102	if (p == NULL) {
42b0158b	103	snd_printk(KERN_ERR "can't create port\n");
1da177e4 LT	104	return -ENOMEM;
	105	}
	106
	107	p->port_mode = SNDRV_EMUX_PORT_MODE_MIDI;
	108	snd_emux_init_port(p);
	109	emu->ports[i] = p->chset.port;
	110	emu->portptrs[i] = p;
	111	}
	112
	113	return 0;
	114	}
	115
	116
	117	/*
	118	* Detach from the ports that were set up for this synthesizer and
	119	* destroy the kernel client.
	120	*/
	121	void
03da312a	122	snd_emux_detach_seq(struct snd_emux *emu)
1da177e4 LT	123	{
	124	if (emu->voices)
	125	snd_emux_terminate_all(emu);
	126
1da177e4 LT	127	if (emu->client >= 0) {
	128	snd_seq_delete_kernel_client(emu->client);
	129	emu->client = -1;
	130	}
1da177e4 LT	131	}
	132
	133
	134	/*
	135	* create a sequencer port and channel_set
	136	*/
	137
03da312a TI	138	struct snd_emux_port *
	139	snd_emux_create_port(struct snd_emux emu, char name,
	140	int max_channels, int oss_port,
	141	struct snd_seq_port_callback *callback)
1da177e4	142	{
03da312a	143	struct snd_emux_port *p;
1da177e4 LT	144	int i, type, cap;
	145
	146	/* Allocate structures for this channel */
561b220a	147	if ((p = kzalloc(sizeof(*p), GFP_KERNEL)) == NULL) {
42b0158b	148	snd_printk(KERN_ERR "no memory\n");
1da177e4 LT	149	return NULL;
1da177e4 LT	150	}
03da312a	151	p->chset.channels = kcalloc(max_channels, sizeof(struct snd_midi_channel), GFP_KERNEL);
1da177e4	152	if (p->chset.channels == NULL) {
42b0158b	153	snd_printk(KERN_ERR "no memory\n");
1da177e4 LT	154	kfree(p);
	155	return NULL;
	156	}
	157	for (i = 0; i < max_channels; i++)
	158	p->chset.channels[i].number = i;
	159	p->chset.private_data = p;
	160	p->chset.max_channels = max_channels;
	161	p->emu = emu;
	162	p->chset.client = emu->client;
	163	#ifdef SNDRV_EMUX_USE_RAW_EFFECT
	164	snd_emux_create_effect(p);
	165	#endif
	166	callback->private_free = free_port;
	167	callback->private_data = p;
	168
	169	cap = SNDRV_SEQ_PORT_CAP_WRITE;
	170	if (oss_port) {
	171	type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
	172	} else {
	173	type = DEFAULT_MIDI_TYPE;
	174	cap \|= SNDRV_SEQ_PORT_CAP_SUBS_WRITE;
	175	}
	176
	177	p->chset.port = snd_seq_event_port_attach(emu->client, callback,
	178	cap, type, max_channels,
	179	emu->max_voices, name);
	180
	181	return p;
	182	}
	183
	184
	185	/*
	186	* release memory block for port
	187	*/
	188	static void
	189	free_port(void *private_data)
	190	{
03da312a	191	struct snd_emux_port *p;
1da177e4 LT	192
	193	p = private_data;
	194	if (p) {
	195	#ifdef SNDRV_EMUX_USE_RAW_EFFECT
	196	snd_emux_delete_effect(p);
	197	#endif
	198	kfree(p->chset.channels);
	199	kfree(p);
	200	}
	201	}
	202
	203
	204	#define DEFAULT_DRUM_FLAGS (1<<9)
	205
	206	/*
	207	* initialize the port specific parameters
	208	*/
	209	static void
03da312a	210	snd_emux_init_port(struct snd_emux_port *p)
1da177e4 LT	211	{
	212	p->drum_flags = DEFAULT_DRUM_FLAGS;
	213	p->volume_atten = 0;
	214
	215	snd_emux_reset_port(p);
	216	}
	217
	218
	219	/*
	220	* reset port
	221	*/
	222	void
03da312a	223	snd_emux_reset_port(struct snd_emux_port *port)
1da177e4 LT	224	{
	225	int i;
	226
	227	/* stop all sounds */
	228	snd_emux_sounds_off_all(port);
	229
	230	snd_midi_channel_set_clear(&port->chset);
	231
	232	#ifdef SNDRV_EMUX_USE_RAW_EFFECT
	233	snd_emux_clear_effect(port);
	234	#endif
	235
	236	/* set port specific control parameters */
	237	port->ctrls[EMUX_MD_DEF_BANK] = 0;
	238	port->ctrls[EMUX_MD_DEF_DRUM] = 0;
	239	port->ctrls[EMUX_MD_REALTIME_PAN] = 1;
	240
	241	for (i = 0; i < port->chset.max_channels; i++) {
03da312a	242	struct snd_midi_channel *chan = port->chset.channels + i;
1da177e4 LT	243	chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
	244	}
	245	}
	246
	247
	248	/*
	249	* input sequencer event
	250	*/
	251	int
03da312a	252	snd_emux_event_input(struct snd_seq_event ev, int direct, void private_data,
1da177e4 LT	253	int atomic, int hop)
1da177e4 LT	254	{
03da312a	255	struct snd_emux_port *port;
1da177e4 LT	256
1da177e4 LT	257	port = private_data;
5e246b85 TI	258	if (snd_BUG_ON(!port \|\| !ev))
5e246b85 TI	259	return -EINVAL;
1da177e4 LT	260
	261	snd_midi_process_event(&emux_ops, ev, &port->chset);
	262
	263	return 0;
	264	}
	265
	266
	267	/*
	268	* increment usage count
	269	*/
	270	int
03da312a	271	snd_emux_inc_count(struct snd_emux *emu)
1da177e4 LT	272	{
	273	emu->used++;
	274	if (!try_module_get(emu->ops.owner))
	275	goto __error;
	276	if (!try_module_get(emu->card->module)) {
	277	module_put(emu->ops.owner);
	278	__error:
	279	emu->used--;
	280	return 0;
	281	}
	282	return 1;
	283	}
	284
	285
	286	/*
	287	* decrease usage count
	288	*/
	289	void
03da312a	290	snd_emux_dec_count(struct snd_emux *emu)
1da177e4 LT	291	{
	292	module_put(emu->card->module);
	293	emu->used--;
	294	if (emu->used <= 0)
	295	snd_emux_terminate_all(emu);
	296	module_put(emu->ops.owner);
	297	}
	298
	299
	300	/*
	301	* Routine that is called upon a first use of a particular port
	302	*/
	303	static int
03da312a	304	snd_emux_use(void private_data, struct snd_seq_port_subscribe info)
1da177e4	305	{
03da312a TI	306	struct snd_emux_port *p;
03da312a TI	307	struct snd_emux *emu;
1da177e4 LT	308
1da177e4 LT	309	p = private_data;
5e246b85 TI	310	if (snd_BUG_ON(!p))
5e246b85 TI	311	return -EINVAL;
1da177e4	312	emu = p->emu;
5e246b85 TI	313	if (snd_BUG_ON(!emu))
5e246b85 TI	314	return -EINVAL;
1da177e4	315
ef9f0a42	316	mutex_lock(&emu->register_mutex);
1da177e4 LT	317	snd_emux_init_port(p);
1da177e4 LT	318	snd_emux_inc_count(emu);
ef9f0a42	319	mutex_unlock(&emu->register_mutex);
1da177e4 LT	320	return 0;
	321	}
	322
	323	/*
	324	* Routine that is called upon the last unuse() of a particular port.
	325	*/
	326	static int
03da312a	327	snd_emux_unuse(void private_data, struct snd_seq_port_subscribe info)
1da177e4	328	{
03da312a TI	329	struct snd_emux_port *p;
03da312a TI	330	struct snd_emux *emu;
1da177e4 LT	331
1da177e4 LT	332	p = private_data;
5e246b85 TI	333	if (snd_BUG_ON(!p))
5e246b85 TI	334	return -EINVAL;
1da177e4	335	emu = p->emu;
5e246b85 TI	336	if (snd_BUG_ON(!emu))
5e246b85 TI	337	return -EINVAL;
1da177e4	338
ef9f0a42	339	mutex_lock(&emu->register_mutex);
1da177e4 LT	340	snd_emux_sounds_off_all(p);
1da177e4 LT	341	snd_emux_dec_count(emu);
ef9f0a42	342	mutex_unlock(&emu->register_mutex);
1da177e4 LT	343	return 0;
	344	}
	345
	346
1da177e4 LT	347	/*
	348	* attach virtual rawmidi devices
	349	*/
03da312a	350	int snd_emux_init_virmidi(struct snd_emux emu, struct snd_card card)
1da177e4 LT	351	{
	352	int i;
	353
	354	emu->vmidi = NULL;
	355	if (emu->midi_ports <= 0)
	356	return 0;
	357
03da312a	358	emu->vmidi = kcalloc(emu->midi_ports, sizeof(struct snd_rawmidi *), GFP_KERNEL);
1da177e4 LT	359	if (emu->vmidi == NULL)
	360	return -ENOMEM;
	361
	362	for (i = 0; i < emu->midi_ports; i++) {
03da312a TI	363	struct snd_rawmidi *rmidi;
03da312a TI	364	struct snd_virmidi_dev *rdev;
1da177e4 LT	365	if (snd_virmidi_new(card, emu->midi_devidx + i, &rmidi) < 0)
	366	goto __error;
	367	rdev = rmidi->private_data;
	368	sprintf(rmidi->name, "%s Synth MIDI", emu->name);
	369	rdev->seq_mode = SNDRV_VIRMIDI_SEQ_ATTACH;
	370	rdev->client = emu->client;
	371	rdev->port = emu->ports[i];
	372	if (snd_device_register(card, rmidi) < 0) {
	373	snd_device_free(card, rmidi);
	374	goto __error;
	375	}
	376	emu->vmidi[i] = rmidi;
42b0158b	377	/* snd_printk(KERN_DEBUG "virmidi %d ok\n", i); */
1da177e4 LT	378	}
	379	return 0;
	380
	381	__error:
42b0158b	382	/* snd_printk(KERN_DEBUG "error init..\n"); */
1da177e4 LT	383	snd_emux_delete_virmidi(emu);
	384	return -ENOMEM;
	385	}
	386
03da312a	387	int snd_emux_delete_virmidi(struct snd_emux *emu)
1da177e4 LT	388	{
	389	int i;
	390
	391	if (emu->vmidi == NULL)
	392	return 0;
	393
	394	for (i = 0; i < emu->midi_ports; i++) {
	395	if (emu->vmidi[i])
	396	snd_device_free(emu->card, emu->vmidi[i]);
	397	}
	398	kfree(emu->vmidi);
	399	emu->vmidi = NULL;
	400	return 0;
	401	}