[deliverable/linux.git] / sound / core / seq / oss / seq_oss.c

/*
 * OSS compatible sequencer driver
 *
 * registration of device and proc
 *
 * Copyright (C) 1998,99 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 <sound/driver.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/initval.h>
#include "seq_oss_device.h"
#include "seq_oss_synth.h"

/*
 * module option
 */
MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("OSS-compatible sequencer module");
MODULE_LICENSE("GPL");
/* Takashi says this is really only for sound-service-0-, but this is OK. */
MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_SEQUENCER);
MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MUSIC);

#ifdef SNDRV_SEQ_OSS_DEBUG
module_param(seq_oss_debug, int, 0644);
MODULE_PARM_DESC(seq_oss_debug, "debug option");
int seq_oss_debug = 0;
#endif


/*
 * prototypes
 */
static int register_device(void);
static void unregister_device(void);
#ifdef CONFIG_PROC_FS
static int register_proc(void);
static void unregister_proc(void);
#else
static inline int register_proc(void) { return 0; }
static inline void unregister_proc(void) {}
#endif

static int odev_open(struct inode *inode, struct file *file);
static int odev_release(struct inode *inode, struct file *file);
static ssize_t odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset);
static ssize_t odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset);
static long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
static unsigned int odev_poll(struct file *file, poll_table * wait);


/*
 * module interface
 */

static int __init alsa_seq_oss_init(void)
{
	int rc;
	static struct snd_seq_dev_ops ops = {
		snd_seq_oss_synth_register,
		snd_seq_oss_synth_unregister,
	};

	snd_seq_autoload_lock();
	if ((rc = register_device()) < 0)
		goto error;
	if ((rc = register_proc()) < 0) {
		unregister_device();
		goto error;
	}
	if ((rc = snd_seq_oss_create_client()) < 0) {
		unregister_proc();
		unregister_device();
		goto error;
	}

	if ((rc = snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OSS, &ops,
						 sizeof(struct snd_seq_oss_reg))) < 0) {
		snd_seq_oss_delete_client();
		unregister_proc();
		unregister_device();
		goto error;
	}

	/* success */
	snd_seq_oss_synth_init();

 error:
	snd_seq_autoload_unlock();
	return rc;
}

static void __exit alsa_seq_oss_exit(void)
{
	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OSS);
	snd_seq_oss_delete_client();
	unregister_proc();
	unregister_device();
}

module_init(alsa_seq_oss_init)
module_exit(alsa_seq_oss_exit)

/*
 * ALSA minor device interface
 */

static DEFINE_MUTEX(register_mutex);

static int
odev_open(struct inode *inode, struct file *file)
{
	int level, rc;

	if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
		level = SNDRV_SEQ_OSS_MODE_MUSIC;
	else
		level = SNDRV_SEQ_OSS_MODE_SYNTH;

	mutex_lock(&register_mutex);
	rc = snd_seq_oss_open(file, level);
	mutex_unlock(&register_mutex);

	return rc;
}

static int
odev_release(struct inode *inode, struct file *file)
{
	struct seq_oss_devinfo *dp;

	if ((dp = file->private_data) == NULL)
		return 0;

	snd_seq_oss_drain_write(dp);

	mutex_lock(&register_mutex);
	snd_seq_oss_release(dp);
	mutex_unlock(&register_mutex);

	return 0;
}

static ssize_t
odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
{
	struct seq_oss_devinfo *dp;
	dp = file->private_data;
	snd_assert(dp != NULL, return -EIO);
	return snd_seq_oss_read(dp, buf, count);
}


static ssize_t
odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
{
	struct seq_oss_devinfo *dp;
	dp = file->private_data;
	snd_assert(dp != NULL, return -EIO);
	return snd_seq_oss_write(dp, buf, count, file);
}

static long
odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct seq_oss_devinfo *dp;
	dp = file->private_data;
	snd_assert(dp != NULL, return -EIO);
	return snd_seq_oss_ioctl(dp, cmd, arg);
}

#ifdef CONFIG_COMPAT
#define odev_ioctl_compat	odev_ioctl
#else
#define odev_ioctl_compat	NULL
#endif

static unsigned int
odev_poll(struct file *file, poll_table * wait)
{
	struct seq_oss_devinfo *dp;
	dp = file->private_data;
	snd_assert(dp != NULL, return 0);
	return snd_seq_oss_poll(dp, file, wait);
}

/*
 * registration of sequencer minor device
 */

static struct file_operations seq_oss_f_ops =
{
	.owner =	THIS_MODULE,
	.read =		odev_read,
	.write =	odev_write,
	.open =		odev_open,
	.release =	odev_release,
	.poll =		odev_poll,
	.unlocked_ioctl =	odev_ioctl,
	.compat_ioctl =	odev_ioctl_compat,
};

static int __init
register_device(void)
{
	int rc;

	mutex_lock(&register_mutex);
	if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
					  NULL, 0,
					  &seq_oss_f_ops, NULL,
					  SNDRV_SEQ_OSS_DEVNAME)) < 0) {
		snd_printk(KERN_ERR "can't register device seq\n");
		mutex_unlock(&register_mutex);
		return rc;
	}
	if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
					  NULL, 0,
					  &seq_oss_f_ops, NULL,
					  SNDRV_SEQ_OSS_DEVNAME)) < 0) {
		snd_printk(KERN_ERR "can't register device music\n");
		snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
		mutex_unlock(&register_mutex);
		return rc;
	}
	debug_printk(("device registered\n"));
	mutex_unlock(&register_mutex);
	return 0;
}

static void
unregister_device(void)
{
	mutex_lock(&register_mutex);
	debug_printk(("device unregistered\n"));
	if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)		
		snd_printk(KERN_ERR "error unregister device music\n");
	if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
		snd_printk(KERN_ERR "error unregister device seq\n");
	mutex_unlock(&register_mutex);
}

/*
 * /proc interface
 */

#ifdef CONFIG_PROC_FS

static struct snd_info_entry *info_entry;

static void
info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf)
{
	mutex_lock(&register_mutex);
	snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
	snd_seq_oss_system_info_read(buf);
	snd_seq_oss_synth_info_read(buf);
	snd_seq_oss_midi_info_read(buf);
	mutex_unlock(&register_mutex);
}


static int __init
register_proc(void)
{
	struct snd_info_entry *entry;

	entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
	if (entry == NULL)
		return -ENOMEM;

	entry->content = SNDRV_INFO_CONTENT_TEXT;
	entry->private_data = NULL;
	entry->c.text.read = info_read;
	if (snd_info_register(entry) < 0) {
		snd_info_free_entry(entry);
		return -ENOMEM;
	}
	info_entry = entry;
	return 0;
}

static void
unregister_proc(void)
{
	snd_info_free_entry(info_entry);
	info_entry = NULL;
}
#endif /* CONFIG_PROC_FS */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* OSS compatible sequencer driver
	3	*
	4	* registration of device and proc
	5	*
	6	* Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
	23	#include <sound/driver.h>
	24	#include <linux/init.h>
	25	#include <linux/smp_lock.h>
	26	#include <linux/moduleparam.h>
1a60d4c5	27	#include <linux/mutex.h>
1da177e4 LT	28	#include <sound/core.h>
	29	#include <sound/minors.h>
	30	#include <sound/initval.h>
	31	#include "seq_oss_device.h"
	32	#include "seq_oss_synth.h"
	33
	34	/*
	35	* module option
	36	*/
	37	MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
	38	MODULE_DESCRIPTION("OSS-compatible sequencer module");
	39	MODULE_LICENSE("GPL");
	40	/* Takashi says this is really only for sound-service-0-, but this is OK. */
	41	MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_SEQUENCER);
	42	MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MUSIC);
	43
	44	#ifdef SNDRV_SEQ_OSS_DEBUG
	45	module_param(seq_oss_debug, int, 0644);
	46	MODULE_PARM_DESC(seq_oss_debug, "debug option");
	47	int seq_oss_debug = 0;
	48	#endif
	49
	50
	51	/*
	52	* prototypes
	53	*/
	54	static int register_device(void);
	55	static void unregister_device(void);
04f141a8	56	#ifdef CONFIG_PROC_FS
1da177e4 LT	57	static int register_proc(void);
1da177e4 LT	58	static void unregister_proc(void);
04f141a8 TI	59	#else
	60	static inline int register_proc(void) { return 0; }
	61	static inline void unregister_proc(void) {}
	62	#endif
1da177e4 LT	63
	64	static int odev_open(struct inode inode, struct file file);
	65	static int odev_release(struct inode inode, struct file file);
	66	static ssize_t odev_read(struct file file, char __user buf, size_t count, loff_t *offset);
	67	static ssize_t odev_write(struct file file, const char __user buf, size_t count, loff_t *offset);
	68	static long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
	69	static unsigned int odev_poll(struct file file, poll_table wait);
1da177e4 LT	70
	71
	72	/*
	73	* module interface
	74	*/
	75
	76	static int __init alsa_seq_oss_init(void)
	77	{
	78	int rc;
080dece3	79	static struct snd_seq_dev_ops ops = {
1da177e4 LT	80	snd_seq_oss_synth_register,
	81	snd_seq_oss_synth_unregister,
	82	};
	83
	84	snd_seq_autoload_lock();
	85	if ((rc = register_device()) < 0)
	86	goto error;
	87	if ((rc = register_proc()) < 0) {
	88	unregister_device();
	89	goto error;
	90	}
	91	if ((rc = snd_seq_oss_create_client()) < 0) {
	92	unregister_proc();
	93	unregister_device();
	94	goto error;
	95	}
	96
	97	if ((rc = snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OSS, &ops,
080dece3	98	sizeof(struct snd_seq_oss_reg))) < 0) {
1da177e4 LT	99	snd_seq_oss_delete_client();
	100	unregister_proc();
	101	unregister_device();
	102	goto error;
	103	}
	104
	105	/* success */
	106	snd_seq_oss_synth_init();
	107
	108	error:
	109	snd_seq_autoload_unlock();
	110	return rc;
	111	}
	112
	113	static void __exit alsa_seq_oss_exit(void)
	114	{
	115	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OSS);
	116	snd_seq_oss_delete_client();
	117	unregister_proc();
	118	unregister_device();
	119	}
	120
	121	module_init(alsa_seq_oss_init)
	122	module_exit(alsa_seq_oss_exit)
	123
	124	/*
	125	* ALSA minor device interface
	126	*/
	127
1a60d4c5	128	static DEFINE_MUTEX(register_mutex);
1da177e4 LT	129
	130	static int
	131	odev_open(struct inode inode, struct file file)
	132	{
	133	int level, rc;
	134
	135	if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
	136	level = SNDRV_SEQ_OSS_MODE_MUSIC;
	137	else
	138	level = SNDRV_SEQ_OSS_MODE_SYNTH;
	139
1a60d4c5	140	mutex_lock(&register_mutex);
1da177e4	141	rc = snd_seq_oss_open(file, level);
1a60d4c5	142	mutex_unlock(&register_mutex);
1da177e4 LT	143
	144	return rc;
	145	}
	146
	147	static int
	148	odev_release(struct inode inode, struct file file)
	149	{
080dece3	150	struct seq_oss_devinfo *dp;
1da177e4 LT	151
	152	if ((dp = file->private_data) == NULL)
	153	return 0;
	154
	155	snd_seq_oss_drain_write(dp);
	156
1a60d4c5	157	mutex_lock(&register_mutex);
1da177e4	158	snd_seq_oss_release(dp);
1a60d4c5	159	mutex_unlock(&register_mutex);
1da177e4 LT	160
	161	return 0;
	162	}
	163
	164	static ssize_t
	165	odev_read(struct file file, char __user buf, size_t count, loff_t *offset)
	166	{
080dece3	167	struct seq_oss_devinfo *dp;
1da177e4 LT	168	dp = file->private_data;
	169	snd_assert(dp != NULL, return -EIO);
	170	return snd_seq_oss_read(dp, buf, count);
	171	}
	172
	173
	174	static ssize_t
	175	odev_write(struct file file, const char __user buf, size_t count, loff_t *offset)
	176	{
080dece3	177	struct seq_oss_devinfo *dp;
1da177e4 LT	178	dp = file->private_data;
	179	snd_assert(dp != NULL, return -EIO);
	180	return snd_seq_oss_write(dp, buf, count, file);
	181	}
	182
	183	static long
	184	odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	185	{
080dece3	186	struct seq_oss_devinfo *dp;
1da177e4 LT	187	dp = file->private_data;
	188	snd_assert(dp != NULL, return -EIO);
	189	return snd_seq_oss_ioctl(dp, cmd, arg);
	190	}
	191
	192	#ifdef CONFIG_COMPAT
	193	#define odev_ioctl_compat odev_ioctl
	194	#else
	195	#define odev_ioctl_compat NULL
	196	#endif
	197
	198	static unsigned int
	199	odev_poll(struct file file, poll_table wait)
	200	{
080dece3	201	struct seq_oss_devinfo *dp;
1da177e4 LT	202	dp = file->private_data;
	203	snd_assert(dp != NULL, return 0);
	204	return snd_seq_oss_poll(dp, file, wait);
	205	}
	206
	207	/*
	208	* registration of sequencer minor device
	209	*/
	210
	211	static struct file_operations seq_oss_f_ops =
	212	{
	213	.owner = THIS_MODULE,
	214	.read = odev_read,
	215	.write = odev_write,
	216	.open = odev_open,
	217	.release = odev_release,
	218	.poll = odev_poll,
	219	.unlocked_ioctl = odev_ioctl,
	220	.compat_ioctl = odev_ioctl_compat,
	221	};
	222
1da177e4 LT	223	static int __init
	224	register_device(void)
	225	{
	226	int rc;
	227
1a60d4c5	228	mutex_lock(&register_mutex);
1da177e4 LT	229	if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
1da177e4 LT	230	NULL, 0,
f87135f5	231	&seq_oss_f_ops, NULL,
1da177e4 LT	232	SNDRV_SEQ_OSS_DEVNAME)) < 0) {
1da177e4 LT	233	snd_printk(KERN_ERR "can't register device seq\n");
1a60d4c5	234	mutex_unlock(&register_mutex);
1da177e4 LT	235	return rc;
	236	}
	237	if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
	238	NULL, 0,
f87135f5	239	&seq_oss_f_ops, NULL,
1da177e4 LT	240	SNDRV_SEQ_OSS_DEVNAME)) < 0) {
	241	snd_printk(KERN_ERR "can't register device music\n");
	242	snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
1a60d4c5	243	mutex_unlock(&register_mutex);
1da177e4 LT	244	return rc;
	245	}
	246	debug_printk(("device registered\n"));
1a60d4c5	247	mutex_unlock(&register_mutex);
1da177e4 LT	248	return 0;
	249	}
	250
	251	static void
	252	unregister_device(void)
	253	{
1a60d4c5	254	mutex_lock(&register_mutex);
1da177e4 LT	255	debug_printk(("device unregistered\n"));
	256	if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
	257	snd_printk(KERN_ERR "error unregister device music\n");
	258	if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
	259	snd_printk(KERN_ERR "error unregister device seq\n");
1a60d4c5	260	mutex_unlock(&register_mutex);
1da177e4 LT	261	}
	262
	263	/*
	264	* /proc interface
	265	*/
	266
	267	#ifdef CONFIG_PROC_FS
	268
080dece3	269	static struct snd_info_entry *info_entry;
1da177e4 LT	270
1da177e4 LT	271	static void
080dece3	272	info_read(struct snd_info_entry entry, struct snd_info_buffer buf)
1da177e4	273	{
1a60d4c5	274	mutex_lock(&register_mutex);
1da177e4 LT	275	snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
	276	snd_seq_oss_system_info_read(buf);
	277	snd_seq_oss_synth_info_read(buf);
	278	snd_seq_oss_midi_info_read(buf);
1a60d4c5	279	mutex_unlock(&register_mutex);
1da177e4 LT	280	}
1da177e4 LT	281
1da177e4 LT	282
	283	static int __init
	284	register_proc(void)
	285	{
080dece3	286	struct snd_info_entry *entry;
1da177e4 LT	287
	288	entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
	289	if (entry == NULL)
	290	return -ENOMEM;
	291
	292	entry->content = SNDRV_INFO_CONTENT_TEXT;
	293	entry->private_data = NULL;
1da177e4 LT	294	entry->c.text.read = info_read;
	295	if (snd_info_register(entry) < 0) {
	296	snd_info_free_entry(entry);
	297	return -ENOMEM;
	298	}
	299	info_entry = entry;
1da177e4 LT	300	return 0;
	301	}
	302
	303	static void
	304	unregister_proc(void)
	305	{
746d4a02	306	snd_info_free_entry(info_entry);
1da177e4	307	info_entry = NULL;
1da177e4	308	}
04f141a8	309	#endif /* CONFIG_PROC_FS */