[mirror_ubuntu-bionic-kernel.git] / sound / core / sound_oss.c

/*
 *  Advanced Linux Sound Architecture
 *  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>

#ifdef CONFIG_SND_OSSEMUL

#if !defined(CONFIG_SOUND) && !(defined(MODULE) && defined(CONFIG_SOUND_MODULE))
#error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel."
#endif

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/info.h>
#include <linux/sound.h>
#include <linux/mutex.h>

#define SNDRV_OSS_MINORS 128

static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS];
static DEFINE_MUTEX(sound_oss_mutex);

void *snd_lookup_oss_minor_data(unsigned int minor, int type)
{
	struct snd_minor *mreg;
	void *private_data;

	if (minor >= ARRAY_SIZE(snd_oss_minors))
		return NULL;
	mutex_lock(&sound_oss_mutex);
	mreg = snd_oss_minors[minor];
	if (mreg && mreg->type == type)
		private_data = mreg->private_data;
	else
		private_data = NULL;
	mutex_unlock(&sound_oss_mutex);
	return private_data;
}

EXPORT_SYMBOL(snd_lookup_oss_minor_data);

static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
{
	int minor;

	switch (type) {
	case SNDRV_OSS_DEVICE_TYPE_MIXER:
		snd_assert(card != NULL && dev <= 1, return -EINVAL);
		minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
		break;
	case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
		minor = SNDRV_MINOR_OSS_SEQUENCER;
		break;
	case SNDRV_OSS_DEVICE_TYPE_MUSIC:
		minor = SNDRV_MINOR_OSS_MUSIC;
		break;
	case SNDRV_OSS_DEVICE_TYPE_PCM:
		snd_assert(card != NULL && dev <= 1, return -EINVAL);
		minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
		break;
	case SNDRV_OSS_DEVICE_TYPE_MIDI:
		snd_assert(card != NULL && dev <= 1, return -EINVAL);
		minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
		break;
	case SNDRV_OSS_DEVICE_TYPE_DMFM:
		minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM);
		break;
	case SNDRV_OSS_DEVICE_TYPE_SNDSTAT:
		minor = SNDRV_MINOR_OSS_SNDSTAT;
		break;
	default:
		return -EINVAL;
	}
	snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL);
	return minor;
}

int snd_register_oss_device(int type, struct snd_card *card, int dev,
			    const struct file_operations *f_ops, void *private_data,
			    const char *name)
{
	int minor = snd_oss_kernel_minor(type, card, dev);
	int minor_unit;
	struct snd_minor *preg;
	int cidx = SNDRV_MINOR_OSS_CARD(minor);
	int track2 = -1;
	int register1 = -1, register2 = -1;
	struct device *carddev = NULL;

	if (card && card->number >= 8)
		return 0; /* ignore silently */
	if (minor < 0)
		return minor;
	preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
	if (preg == NULL)
		return -ENOMEM;
	preg->type = type;
	preg->card = card ? card->number : -1;
	preg->device = dev;
	preg->f_ops = f_ops;
	preg->private_data = private_data;
	mutex_lock(&sound_oss_mutex);
	snd_oss_minors[minor] = preg;
	minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
	switch (minor_unit) {
	case SNDRV_MINOR_OSS_PCM:
		track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
		break;
	case SNDRV_MINOR_OSS_MIDI:
		track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
		break;
	case SNDRV_MINOR_OSS_MIDI1:
		track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
		break;
	}
	if (card)
		carddev = card->dev;
	register1 = register_sound_special_device(f_ops, minor, carddev);
	if (register1 != minor)
		goto __end;
	if (track2 >= 0) {
		register2 = register_sound_special_device(f_ops, track2,
							  carddev);
		if (register2 != track2)
			goto __end;
		snd_oss_minors[track2] = preg;
	}
	mutex_unlock(&sound_oss_mutex);
	return 0;

      __end:
      	if (register2 >= 0)
      		unregister_sound_special(register2);
      	if (register1 >= 0)
      		unregister_sound_special(register1);
	snd_oss_minors[minor] = NULL;
	mutex_unlock(&sound_oss_mutex);
	kfree(preg);
      	return -EBUSY;
}

EXPORT_SYMBOL(snd_register_oss_device);

int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
{
	int minor = snd_oss_kernel_minor(type, card, dev);
	int cidx = SNDRV_MINOR_OSS_CARD(minor);
	int track2 = -1;
	struct snd_minor *mptr;

	if (card && card->number >= 8)
		return 0;
	if (minor < 0)
		return minor;
	mutex_lock(&sound_oss_mutex);
	mptr = snd_oss_minors[minor];
	if (mptr == NULL) {
		mutex_unlock(&sound_oss_mutex);
		return -ENOENT;
	}
	unregister_sound_special(minor);
	switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
	case SNDRV_MINOR_OSS_PCM:
		track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
		break;
	case SNDRV_MINOR_OSS_MIDI:
		track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
		break;
	case SNDRV_MINOR_OSS_MIDI1:
		track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
		break;
	}
	if (track2 >= 0) {
		unregister_sound_special(track2);
		snd_oss_minors[track2] = NULL;
	}
	snd_oss_minors[minor] = NULL;
	mutex_unlock(&sound_oss_mutex);
	kfree(mptr);
	return 0;
}

EXPORT_SYMBOL(snd_unregister_oss_device);

/*
 *  INFO PART
 */

#ifdef CONFIG_PROC_FS

static struct snd_info_entry *snd_minor_info_oss_entry;

static const char *snd_oss_device_type_name(int type)
{
	switch (type) {
	case SNDRV_OSS_DEVICE_TYPE_MIXER:
		return "mixer";
	case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
	case SNDRV_OSS_DEVICE_TYPE_MUSIC:
		return "sequencer";
	case SNDRV_OSS_DEVICE_TYPE_PCM:
		return "digital audio";
	case SNDRV_OSS_DEVICE_TYPE_MIDI:
		return "raw midi";
	case SNDRV_OSS_DEVICE_TYPE_DMFM:
		return "hardware dependent";
	default:
		return "?";
	}
}

static void snd_minor_info_oss_read(struct snd_info_entry *entry,
				    struct snd_info_buffer *buffer)
{
	int minor;
	struct snd_minor *mptr;

	mutex_lock(&sound_oss_mutex);
	for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) {
		if (!(mptr = snd_oss_minors[minor]))
			continue;
		if (mptr->card >= 0)
			snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor,
				    mptr->card, mptr->device,
				    snd_oss_device_type_name(mptr->type));
		else
			snd_iprintf(buffer, "%3i:       : %s\n", minor,
				    snd_oss_device_type_name(mptr->type));
	}
	mutex_unlock(&sound_oss_mutex);
}


int __init snd_minor_info_oss_init(void)
{
	struct snd_info_entry *entry;

	entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
	if (entry) {
		entry->c.text.read = snd_minor_info_oss_read;
		if (snd_info_register(entry) < 0) {
			snd_info_free_entry(entry);
			entry = NULL;
		}
	}
	snd_minor_info_oss_entry = entry;
	return 0;
}

int __exit snd_minor_info_oss_done(void)
{
	snd_info_free_entry(snd_minor_info_oss_entry);
	return 0;
}
#endif /* CONFIG_PROC_FS */

#endif /* CONFIG_SND_OSSEMUL */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Advanced Linux Sound Architecture
	3	* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
	4	*
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
	22	#include <sound/driver.h>
	23
	24	#ifdef CONFIG_SND_OSSEMUL
	25
	26	#if !defined(CONFIG_SOUND) && !(defined(MODULE) && defined(CONFIG_SOUND_MODULE))
	27	#error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel."
	28	#endif
	29
	30	#include <linux/init.h>
	31	#include <linux/slab.h>
	32	#include <linux/time.h>
	33	#include <sound/core.h>
	34	#include <sound/minors.h>
	35	#include <sound/info.h>
	36	#include <linux/sound.h>
1a60d4c5	37	#include <linux/mutex.h>
1da177e4	38
6983b724	39	#define SNDRV_OSS_MINORS 128
1da177e4	40
6983b724	41	static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS];
1a60d4c5	42	static DEFINE_MUTEX(sound_oss_mutex);
1da177e4	43
f87135f5 CL	44	void *snd_lookup_oss_minor_data(unsigned int minor, int type)
	45	{
	46	struct snd_minor *mreg;
	47	void *private_data;
	48
3a63e444	49	if (minor >= ARRAY_SIZE(snd_oss_minors))
f87135f5	50	return NULL;
1a60d4c5	51	mutex_lock(&sound_oss_mutex);
f87135f5 CL	52	mreg = snd_oss_minors[minor];
	53	if (mreg && mreg->type == type)
	54	private_data = mreg->private_data;
	55	else
	56	private_data = NULL;
1a60d4c5	57	mutex_unlock(&sound_oss_mutex);
f87135f5 CL	58	return private_data;
	59	}
	60
c0d3fb39 TI	61	EXPORT_SYMBOL(snd_lookup_oss_minor_data);
c0d3fb39 TI	62
174c1f65	63	static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
1da177e4 LT	64	{
	65	int minor;
	66
	67	switch (type) {
	68	case SNDRV_OSS_DEVICE_TYPE_MIXER:
	69	snd_assert(card != NULL && dev <= 1, return -EINVAL);
	70	minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
	71	break;
	72	case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
	73	minor = SNDRV_MINOR_OSS_SEQUENCER;
	74	break;
	75	case SNDRV_OSS_DEVICE_TYPE_MUSIC:
	76	minor = SNDRV_MINOR_OSS_MUSIC;
	77	break;
	78	case SNDRV_OSS_DEVICE_TYPE_PCM:
	79	snd_assert(card != NULL && dev <= 1, return -EINVAL);
	80	minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
	81	break;
	82	case SNDRV_OSS_DEVICE_TYPE_MIDI:
	83	snd_assert(card != NULL && dev <= 1, return -EINVAL);
	84	minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
	85	break;
	86	case SNDRV_OSS_DEVICE_TYPE_DMFM:
	87	minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM);
	88	break;
	89	case SNDRV_OSS_DEVICE_TYPE_SNDSTAT:
	90	minor = SNDRV_MINOR_OSS_SNDSTAT;
	91	break;
	92	default:
	93	return -EINVAL;
	94	}
6983b724	95	snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL);
1da177e4 LT	96	return minor;
	97	}
	98
174c1f65	99	int snd_register_oss_device(int type, struct snd_card *card, int dev,
99ac48f5	100	const struct file_operations f_ops, void private_data,
f87135f5	101	const char *name)
1da177e4 LT	102	{
	103	int minor = snd_oss_kernel_minor(type, card, dev);
	104	int minor_unit;
174c1f65	105	struct snd_minor *preg;
1da177e4 LT	106	int cidx = SNDRV_MINOR_OSS_CARD(minor);
	107	int track2 = -1;
	108	int register1 = -1, register2 = -1;
d568121c	109	struct device *carddev = NULL;
1da177e4	110
d001544d CL	111	if (card && card->number >= 8)
d001544d CL	112	return 0; /* ignore silently */
1da177e4 LT	113	if (minor < 0)
1da177e4 LT	114	return minor;
6983b724	115	preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
1da177e4 LT	116	if (preg == NULL)
1da177e4 LT	117	return -ENOMEM;
2af677fc	118	preg->type = type;
6983b724	119	preg->card = card ? card->number : -1;
1da177e4	120	preg->device = dev;
2af677fc	121	preg->f_ops = f_ops;
f87135f5	122	preg->private_data = private_data;
1a60d4c5	123	mutex_lock(&sound_oss_mutex);
6983b724	124	snd_oss_minors[minor] = preg;
1da177e4 LT	125	minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
	126	switch (minor_unit) {
	127	case SNDRV_MINOR_OSS_PCM:
	128	track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
	129	break;
	130	case SNDRV_MINOR_OSS_MIDI:
	131	track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
	132	break;
	133	case SNDRV_MINOR_OSS_MIDI1:
	134	track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
	135	break;
	136	}
d568121c TI	137	if (card)
d568121c TI	138	carddev = card->dev;
2af677fc	139	register1 = register_sound_special_device(f_ops, minor, carddev);
1da177e4 LT	140	if (register1 != minor)
	141	goto __end;
	142	if (track2 >= 0) {
2af677fc CL	143	register2 = register_sound_special_device(f_ops, track2,
2af677fc CL	144	carddev);
1da177e4 LT	145	if (register2 != track2)
1da177e4 LT	146	goto __end;
f87135f5	147	snd_oss_minors[track2] = preg;
1da177e4	148	}
1a60d4c5	149	mutex_unlock(&sound_oss_mutex);
1da177e4 LT	150	return 0;
	151
	152	__end:
	153	if (register2 >= 0)
	154	unregister_sound_special(register2);
	155	if (register1 >= 0)
	156	unregister_sound_special(register1);
6983b724	157	snd_oss_minors[minor] = NULL;
1a60d4c5	158	mutex_unlock(&sound_oss_mutex);
1da177e4 LT	159	kfree(preg);
	160	return -EBUSY;
	161	}
	162
c0d3fb39 TI	163	EXPORT_SYMBOL(snd_register_oss_device);
c0d3fb39 TI	164
174c1f65	165	int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
1da177e4 LT	166	{
	167	int minor = snd_oss_kernel_minor(type, card, dev);
	168	int cidx = SNDRV_MINOR_OSS_CARD(minor);
	169	int track2 = -1;
174c1f65	170	struct snd_minor *mptr;
1da177e4	171
d001544d CL	172	if (card && card->number >= 8)
d001544d CL	173	return 0;
1da177e4 LT	174	if (minor < 0)
1da177e4 LT	175	return minor;
1a60d4c5	176	mutex_lock(&sound_oss_mutex);
6983b724	177	mptr = snd_oss_minors[minor];
1da177e4	178	if (mptr == NULL) {
1a60d4c5	179	mutex_unlock(&sound_oss_mutex);
1da177e4 LT	180	return -ENOENT;
	181	}
	182	unregister_sound_special(minor);
	183	switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
	184	case SNDRV_MINOR_OSS_PCM:
	185	track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
	186	break;
	187	case SNDRV_MINOR_OSS_MIDI:
	188	track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
	189	break;
	190	case SNDRV_MINOR_OSS_MIDI1:
	191	track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
	192	break;
	193	}
f87135f5	194	if (track2 >= 0) {
1da177e4	195	unregister_sound_special(track2);
f87135f5 CL	196	snd_oss_minors[track2] = NULL;
f87135f5 CL	197	}
6983b724	198	snd_oss_minors[minor] = NULL;
1a60d4c5	199	mutex_unlock(&sound_oss_mutex);
1da177e4 LT	200	kfree(mptr);
	201	return 0;
	202	}
	203
c0d3fb39 TI	204	EXPORT_SYMBOL(snd_unregister_oss_device);
c0d3fb39 TI	205
1da177e4 LT	206	/*
	207	* INFO PART
	208	*/
	209
	210	#ifdef CONFIG_PROC_FS
	211
6581f4e7	212	static struct snd_info_entry *snd_minor_info_oss_entry;
1da177e4	213
2af677fc CL	214	static const char *snd_oss_device_type_name(int type)
	215	{
	216	switch (type) {
	217	case SNDRV_OSS_DEVICE_TYPE_MIXER:
	218	return "mixer";
	219	case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
	220	case SNDRV_OSS_DEVICE_TYPE_MUSIC:
	221	return "sequencer";
	222	case SNDRV_OSS_DEVICE_TYPE_PCM:
	223	return "digital audio";
	224	case SNDRV_OSS_DEVICE_TYPE_MIDI:
	225	return "raw midi";
	226	case SNDRV_OSS_DEVICE_TYPE_DMFM:
	227	return "hardware dependent";
	228	default:
	229	return "?";
	230	}
	231	}
	232
174c1f65 TI	233	static void snd_minor_info_oss_read(struct snd_info_entry *entry,
174c1f65 TI	234	struct snd_info_buffer *buffer)
1da177e4	235	{
6983b724	236	int minor;
174c1f65	237	struct snd_minor *mptr;
1da177e4	238
1a60d4c5	239	mutex_lock(&sound_oss_mutex);
6983b724 CL	240	for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) {
	241	if (!(mptr = snd_oss_minors[minor]))
	242	continue;
	243	if (mptr->card >= 0)
	244	snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor,
	245	mptr->card, mptr->device,
	246	snd_oss_device_type_name(mptr->type));
	247	else
	248	snd_iprintf(buffer, "%3i: : %s\n", minor,
	249	snd_oss_device_type_name(mptr->type));
1da177e4	250	}
1a60d4c5	251	mutex_unlock(&sound_oss_mutex);
1da177e4 LT	252	}
1da177e4 LT	253
1da177e4 LT	254
	255	int __init snd_minor_info_oss_init(void)
	256	{
174c1f65	257	struct snd_info_entry *entry;
1da177e4 LT	258
	259	entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
	260	if (entry) {
1da177e4 LT	261	entry->c.text.read = snd_minor_info_oss_read;
	262	if (snd_info_register(entry) < 0) {
	263	snd_info_free_entry(entry);
	264	entry = NULL;
	265	}
	266	}
	267	snd_minor_info_oss_entry = entry;
1da177e4 LT	268	return 0;
	269	}
	270
	271	int __exit snd_minor_info_oss_done(void)
	272	{
746d4a02	273	snd_info_free_entry(snd_minor_info_oss_entry);
1da177e4 LT	274	return 0;
1da177e4 LT	275	}
e28563cc	276	#endif /* CONFIG_PROC_FS */
1da177e4	277
1da177e4	278	#endif /* CONFIG_SND_OSSEMUL */