[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 = {
	.note_on = snd_emux_note_on,
	.note_off = snd_emux_note_off,
	.key_press = snd_emux_key_press,
	.note_terminate = snd_emux_terminate_note,
	.control = snd_emux_control,
	.nrpn = snd_emux_nrpn,
	.sysex = 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) {
			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 */
	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (!p) {
		snd_printk(KERN_ERR "no memory\n");
		return NULL;
	}
	p->chset.channels = kcalloc(max_channels, sizeof(*p->chset.channels),
				    GFP_KERNEL);
	if (!p->chset.channels) {
		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
 */
static 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;
}

int snd_emux_inc_count(struct snd_emux *emu)
{
	int ret;

	mutex_lock(&emu->register_mutex);
	ret = __snd_emux_inc_count(emu);
	mutex_unlock(&emu->register_mutex);
	return ret;
}

/*
 * decrease usage count
 */
static 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);
}

void snd_emux_dec_count(struct snd_emux *emu)
{
	mutex_lock(&emu->register_mutex);
	__snd_emux_dec_count(emu);
	mutex_unlock(&emu->register_mutex);
}

/*
 * 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(*emu->vmidi), GFP_KERNEL);
	if (!emu->vmidi)
		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)
		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 = {
f93a1c9e KC	36	.note_on = snd_emux_note_on,
	37	.note_off = snd_emux_note_off,
	38	.key_press = snd_emux_key_press,
	39	.note_terminate = snd_emux_terminate_note,
	40	.control = snd_emux_control,
	41	.nrpn = snd_emux_nrpn,
	42	.sysex = snd_emux_sysex,
1da177e4 LT	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);
fbc020b4	102	if (!p) {
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 */
c997aabb ME	147	p = kzalloc(sizeof(*p), GFP_KERNEL);
c997aabb ME	148	if (!p) {
42b0158b	149	snd_printk(KERN_ERR "no memory\n");
1da177e4 LT	150	return NULL;
1da177e4 LT	151	}
949a0c23 ME	152	p->chset.channels = kcalloc(max_channels, sizeof(*p->chset.channels),
949a0c23 ME	153	GFP_KERNEL);
fbc020b4	154	if (!p->chset.channels) {
42b0158b	155	snd_printk(KERN_ERR "no memory\n");
1da177e4 LT	156	kfree(p);
	157	return NULL;
	158	}
	159	for (i = 0; i < max_channels; i++)
	160	p->chset.channels[i].number = i;
	161	p->chset.private_data = p;
	162	p->chset.max_channels = max_channels;
	163	p->emu = emu;
	164	p->chset.client = emu->client;
	165	#ifdef SNDRV_EMUX_USE_RAW_EFFECT
	166	snd_emux_create_effect(p);
	167	#endif
	168	callback->private_free = free_port;
	169	callback->private_data = p;
	170
	171	cap = SNDRV_SEQ_PORT_CAP_WRITE;
	172	if (oss_port) {
	173	type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
	174	} else {
	175	type = DEFAULT_MIDI_TYPE;
	176	cap \|= SNDRV_SEQ_PORT_CAP_SUBS_WRITE;
	177	}
	178
	179	p->chset.port = snd_seq_event_port_attach(emu->client, callback,
	180	cap, type, max_channels,
	181	emu->max_voices, name);
	182
	183	return p;
	184	}
	185
	186
	187	/*
	188	* release memory block for port
	189	*/
	190	static void
	191	free_port(void *private_data)
	192	{
03da312a	193	struct snd_emux_port *p;
1da177e4 LT	194
	195	p = private_data;
	196	if (p) {
	197	#ifdef SNDRV_EMUX_USE_RAW_EFFECT
	198	snd_emux_delete_effect(p);
	199	#endif
	200	kfree(p->chset.channels);
	201	kfree(p);
	202	}
	203	}
	204
	205
	206	#define DEFAULT_DRUM_FLAGS (1<<9)
	207
	208	/*
	209	* initialize the port specific parameters
	210	*/
	211	static void
03da312a	212	snd_emux_init_port(struct snd_emux_port *p)
1da177e4 LT	213	{
	214	p->drum_flags = DEFAULT_DRUM_FLAGS;
	215	p->volume_atten = 0;
	216
	217	snd_emux_reset_port(p);
	218	}
	219
	220
	221	/*
	222	* reset port
	223	*/
	224	void
03da312a	225	snd_emux_reset_port(struct snd_emux_port *port)
1da177e4 LT	226	{
	227	int i;
	228
	229	/* stop all sounds */
	230	snd_emux_sounds_off_all(port);
	231
	232	snd_midi_channel_set_clear(&port->chset);
	233
	234	#ifdef SNDRV_EMUX_USE_RAW_EFFECT
	235	snd_emux_clear_effect(port);
	236	#endif
	237
	238	/* set port specific control parameters */
	239	port->ctrls[EMUX_MD_DEF_BANK] = 0;
	240	port->ctrls[EMUX_MD_DEF_DRUM] = 0;
	241	port->ctrls[EMUX_MD_REALTIME_PAN] = 1;
	242
	243	for (i = 0; i < port->chset.max_channels; i++) {
03da312a	244	struct snd_midi_channel *chan = port->chset.channels + i;
1da177e4 LT	245	chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
	246	}
	247	}
	248
	249
	250	/*
	251	* input sequencer event
	252	*/
	253	int
03da312a	254	snd_emux_event_input(struct snd_seq_event ev, int direct, void private_data,
1da177e4 LT	255	int atomic, int hop)
1da177e4 LT	256	{
03da312a	257	struct snd_emux_port *port;
1da177e4 LT	258
1da177e4 LT	259	port = private_data;
5e246b85 TI	260	if (snd_BUG_ON(!port \|\| !ev))
5e246b85 TI	261	return -EINVAL;
1da177e4 LT	262
	263	snd_midi_process_event(&emux_ops, ev, &port->chset);
	264
	265	return 0;
	266	}
	267
	268
	269	/*
	270	* increment usage count
	271	*/
1c94e65c TI	272	static int
1c94e65c TI	273	__snd_emux_inc_count(struct snd_emux *emu)
1da177e4 LT	274	{
	275	emu->used++;
	276	if (!try_module_get(emu->ops.owner))
	277	goto __error;
	278	if (!try_module_get(emu->card->module)) {
	279	module_put(emu->ops.owner);
	280	__error:
	281	emu->used--;
	282	return 0;
	283	}
	284	return 1;
	285	}
	286
1c94e65c TI	287	int snd_emux_inc_count(struct snd_emux *emu)
	288	{
	289	int ret;
	290
	291	mutex_lock(&emu->register_mutex);
	292	ret = __snd_emux_inc_count(emu);
	293	mutex_unlock(&emu->register_mutex);
	294	return ret;
	295	}
1da177e4 LT	296
	297	/*
	298	* decrease usage count
	299	*/
1c94e65c TI	300	static void
1c94e65c TI	301	__snd_emux_dec_count(struct snd_emux *emu)
1da177e4 LT	302	{
	303	module_put(emu->card->module);
	304	emu->used--;
	305	if (emu->used <= 0)
	306	snd_emux_terminate_all(emu);
	307	module_put(emu->ops.owner);
	308	}
	309
1c94e65c TI	310	void snd_emux_dec_count(struct snd_emux *emu)
	311	{
	312	mutex_lock(&emu->register_mutex);
	313	__snd_emux_dec_count(emu);
	314	mutex_unlock(&emu->register_mutex);
	315	}
1da177e4 LT	316
	317	/*
	318	* Routine that is called upon a first use of a particular port
	319	*/
	320	static int
03da312a	321	snd_emux_use(void private_data, struct snd_seq_port_subscribe info)
1da177e4	322	{
03da312a TI	323	struct snd_emux_port *p;
03da312a TI	324	struct snd_emux *emu;
1da177e4 LT	325
1da177e4 LT	326	p = private_data;
5e246b85 TI	327	if (snd_BUG_ON(!p))
5e246b85 TI	328	return -EINVAL;
1da177e4	329	emu = p->emu;
5e246b85 TI	330	if (snd_BUG_ON(!emu))
5e246b85 TI	331	return -EINVAL;
1da177e4	332
ef9f0a42	333	mutex_lock(&emu->register_mutex);
1da177e4	334	snd_emux_init_port(p);
1c94e65c	335	__snd_emux_inc_count(emu);
ef9f0a42	336	mutex_unlock(&emu->register_mutex);
1da177e4 LT	337	return 0;
	338	}
	339
	340	/*
	341	* Routine that is called upon the last unuse() of a particular port.
	342	*/
	343	static int
03da312a	344	snd_emux_unuse(void private_data, struct snd_seq_port_subscribe info)
1da177e4	345	{
03da312a TI	346	struct snd_emux_port *p;
03da312a TI	347	struct snd_emux *emu;
1da177e4 LT	348
1da177e4 LT	349	p = private_data;
5e246b85 TI	350	if (snd_BUG_ON(!p))
5e246b85 TI	351	return -EINVAL;
1da177e4	352	emu = p->emu;
5e246b85 TI	353	if (snd_BUG_ON(!emu))
5e246b85 TI	354	return -EINVAL;
1da177e4	355
ef9f0a42	356	mutex_lock(&emu->register_mutex);
1da177e4	357	snd_emux_sounds_off_all(p);
1c94e65c	358	__snd_emux_dec_count(emu);
ef9f0a42	359	mutex_unlock(&emu->register_mutex);
1da177e4 LT	360	return 0;
	361	}
	362
	363
1da177e4 LT	364	/*
	365	* attach virtual rawmidi devices
	366	*/
03da312a	367	int snd_emux_init_virmidi(struct snd_emux emu, struct snd_card card)
1da177e4 LT	368	{
	369	int i;
	370
	371	emu->vmidi = NULL;
	372	if (emu->midi_ports <= 0)
	373	return 0;
	374
949a0c23	375	emu->vmidi = kcalloc(emu->midi_ports, sizeof(*emu->vmidi), GFP_KERNEL);
fbc020b4	376	if (!emu->vmidi)
1da177e4 LT	377	return -ENOMEM;
	378
	379	for (i = 0; i < emu->midi_ports; i++) {
03da312a TI	380	struct snd_rawmidi *rmidi;
03da312a TI	381	struct snd_virmidi_dev *rdev;
1da177e4 LT	382	if (snd_virmidi_new(card, emu->midi_devidx + i, &rmidi) < 0)
	383	goto __error;
	384	rdev = rmidi->private_data;
	385	sprintf(rmidi->name, "%s Synth MIDI", emu->name);
	386	rdev->seq_mode = SNDRV_VIRMIDI_SEQ_ATTACH;
	387	rdev->client = emu->client;
	388	rdev->port = emu->ports[i];
	389	if (snd_device_register(card, rmidi) < 0) {
	390	snd_device_free(card, rmidi);
	391	goto __error;
	392	}
	393	emu->vmidi[i] = rmidi;
42b0158b	394	/* snd_printk(KERN_DEBUG "virmidi %d ok\n", i); */
1da177e4 LT	395	}
	396	return 0;
	397
	398	__error:
42b0158b	399	/* snd_printk(KERN_DEBUG "error init..\n"); */
1da177e4 LT	400	snd_emux_delete_virmidi(emu);
	401	return -ENOMEM;
	402	}
	403
03da312a	404	int snd_emux_delete_virmidi(struct snd_emux *emu)
1da177e4 LT	405	{
	406	int i;
	407
fbc020b4	408	if (!emu->vmidi)
1da177e4 LT	409	return 0;
	410
	411	for (i = 0; i < emu->midi_ports; i++) {
	412	if (emu->vmidi[i])
	413	snd_device_free(emu->card, emu->vmidi[i]);
	414	}
	415	kfree(emu->vmidi);
	416	emu->vmidi = NULL;
	417	return 0;
	418	}