[net-next-2.6.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 <linux/init.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;
	if (snd_BUG_ON(!dp))
		return -ENXIO;
	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;
	if (snd_BUG_ON(!dp))
		return -ENXIO;
	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;
	if (snd_BUG_ON(!dp))
		return -ENXIO;
	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;
	if (snd_BUG_ON(!dp))
		return -ENXIO;
	return snd_seq_oss_poll(dp, file, wait);
}

/*
 * registration of sequencer minor device
 */

static const 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,
	.llseek =	noop_llseek,
};

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
1da177e4	23	#include <linux/init.h>
1da177e4	24	#include <linux/moduleparam.h>
1a60d4c5	25	#include <linux/mutex.h>
1da177e4 LT	26	#include <sound/core.h>
	27	#include <sound/minors.h>
	28	#include <sound/initval.h>
	29	#include "seq_oss_device.h"
	30	#include "seq_oss_synth.h"
	31
	32	/*
	33	* module option
	34	*/
	35	MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
	36	MODULE_DESCRIPTION("OSS-compatible sequencer module");
	37	MODULE_LICENSE("GPL");
	38	/* Takashi says this is really only for sound-service-0-, but this is OK. */
	39	MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_SEQUENCER);
	40	MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MUSIC);
	41
	42	#ifdef SNDRV_SEQ_OSS_DEBUG
	43	module_param(seq_oss_debug, int, 0644);
	44	MODULE_PARM_DESC(seq_oss_debug, "debug option");
	45	int seq_oss_debug = 0;
	46	#endif
	47
	48
	49	/*
	50	* prototypes
	51	*/
	52	static int register_device(void);
	53	static void unregister_device(void);
04f141a8	54	#ifdef CONFIG_PROC_FS
1da177e4 LT	55	static int register_proc(void);
1da177e4 LT	56	static void unregister_proc(void);
04f141a8 TI	57	#else
	58	static inline int register_proc(void) { return 0; }
	59	static inline void unregister_proc(void) {}
	60	#endif
1da177e4 LT	61
	62	static int odev_open(struct inode inode, struct file file);
	63	static int odev_release(struct inode inode, struct file file);
	64	static ssize_t odev_read(struct file file, char __user buf, size_t count, loff_t *offset);
	65	static ssize_t odev_write(struct file file, const char __user buf, size_t count, loff_t *offset);
	66	static long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
	67	static unsigned int odev_poll(struct file file, poll_table wait);
1da177e4 LT	68
	69
	70	/*
	71	* module interface
	72	*/
	73
	74	static int __init alsa_seq_oss_init(void)
	75	{
	76	int rc;
080dece3	77	static struct snd_seq_dev_ops ops = {
1da177e4 LT	78	snd_seq_oss_synth_register,
	79	snd_seq_oss_synth_unregister,
	80	};
	81
	82	snd_seq_autoload_lock();
	83	if ((rc = register_device()) < 0)
	84	goto error;
	85	if ((rc = register_proc()) < 0) {
	86	unregister_device();
	87	goto error;
	88	}
	89	if ((rc = snd_seq_oss_create_client()) < 0) {
	90	unregister_proc();
	91	unregister_device();
	92	goto error;
	93	}
	94
	95	if ((rc = snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OSS, &ops,
080dece3	96	sizeof(struct snd_seq_oss_reg))) < 0) {
1da177e4 LT	97	snd_seq_oss_delete_client();
	98	unregister_proc();
	99	unregister_device();
	100	goto error;
	101	}
	102
	103	/* success */
	104	snd_seq_oss_synth_init();
	105
	106	error:
	107	snd_seq_autoload_unlock();
	108	return rc;
	109	}
	110
	111	static void __exit alsa_seq_oss_exit(void)
	112	{
	113	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OSS);
	114	snd_seq_oss_delete_client();
	115	unregister_proc();
	116	unregister_device();
	117	}
	118
	119	module_init(alsa_seq_oss_init)
	120	module_exit(alsa_seq_oss_exit)
	121
	122	/*
	123	* ALSA minor device interface
	124	*/
	125
1a60d4c5	126	static DEFINE_MUTEX(register_mutex);
1da177e4 LT	127
	128	static int
	129	odev_open(struct inode inode, struct file file)
	130	{
	131	int level, rc;
	132
	133	if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
	134	level = SNDRV_SEQ_OSS_MODE_MUSIC;
	135	else
	136	level = SNDRV_SEQ_OSS_MODE_SYNTH;
	137
1a60d4c5	138	mutex_lock(&register_mutex);
1da177e4	139	rc = snd_seq_oss_open(file, level);
1a60d4c5	140	mutex_unlock(&register_mutex);
1da177e4 LT	141
	142	return rc;
	143	}
	144
	145	static int
	146	odev_release(struct inode inode, struct file file)
	147	{
080dece3	148	struct seq_oss_devinfo *dp;
1da177e4 LT	149
	150	if ((dp = file->private_data) == NULL)
	151	return 0;
	152
	153	snd_seq_oss_drain_write(dp);
	154
1a60d4c5	155	mutex_lock(&register_mutex);
1da177e4	156	snd_seq_oss_release(dp);
1a60d4c5	157	mutex_unlock(&register_mutex);
1da177e4 LT	158
	159	return 0;
	160	}
	161
	162	static ssize_t
	163	odev_read(struct file file, char __user buf, size_t count, loff_t *offset)
	164	{
080dece3	165	struct seq_oss_devinfo *dp;
1da177e4	166	dp = file->private_data;
7eaa943c TI	167	if (snd_BUG_ON(!dp))
7eaa943c TI	168	return -ENXIO;
1da177e4 LT	169	return snd_seq_oss_read(dp, buf, count);
	170	}
	171
	172
	173	static ssize_t
	174	odev_write(struct file file, const char __user buf, size_t count, loff_t *offset)
	175	{
080dece3	176	struct seq_oss_devinfo *dp;
1da177e4	177	dp = file->private_data;
7eaa943c TI	178	if (snd_BUG_ON(!dp))
7eaa943c TI	179	return -ENXIO;
1da177e4 LT	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	187	dp = file->private_data;
7eaa943c TI	188	if (snd_BUG_ON(!dp))
7eaa943c TI	189	return -ENXIO;
1da177e4 LT	190	return snd_seq_oss_ioctl(dp, cmd, arg);
	191	}
	192
	193	#ifdef CONFIG_COMPAT
	194	#define odev_ioctl_compat odev_ioctl
	195	#else
	196	#define odev_ioctl_compat NULL
	197	#endif
	198
	199	static unsigned int
	200	odev_poll(struct file file, poll_table wait)
	201	{
080dece3	202	struct seq_oss_devinfo *dp;
1da177e4	203	dp = file->private_data;
7eaa943c TI	204	if (snd_BUG_ON(!dp))
7eaa943c TI	205	return -ENXIO;
1da177e4 LT	206	return snd_seq_oss_poll(dp, file, wait);
	207	}
	208
	209	/*
	210	* registration of sequencer minor device
	211	*/
	212
9c2e08c5	213	static const struct file_operations seq_oss_f_ops =
1da177e4 LT	214	{
	215	.owner = THIS_MODULE,
	216	.read = odev_read,
	217	.write = odev_write,
	218	.open = odev_open,
	219	.release = odev_release,
	220	.poll = odev_poll,
	221	.unlocked_ioctl = odev_ioctl,
	222	.compat_ioctl = odev_ioctl_compat,
6038f373	223	.llseek = noop_llseek,
1da177e4 LT	224	};
1da177e4 LT	225
1da177e4 LT	226	static int __init
	227	register_device(void)
	228	{
	229	int rc;
	230
1a60d4c5	231	mutex_lock(&register_mutex);
1da177e4 LT	232	if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
1da177e4 LT	233	NULL, 0,
f87135f5	234	&seq_oss_f_ops, NULL,
1da177e4 LT	235	SNDRV_SEQ_OSS_DEVNAME)) < 0) {
1da177e4 LT	236	snd_printk(KERN_ERR "can't register device seq\n");
1a60d4c5	237	mutex_unlock(&register_mutex);
1da177e4 LT	238	return rc;
	239	}
	240	if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
	241	NULL, 0,
f87135f5	242	&seq_oss_f_ops, NULL,
1da177e4 LT	243	SNDRV_SEQ_OSS_DEVNAME)) < 0) {
	244	snd_printk(KERN_ERR "can't register device music\n");
	245	snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
1a60d4c5	246	mutex_unlock(&register_mutex);
1da177e4 LT	247	return rc;
	248	}
	249	debug_printk(("device registered\n"));
1a60d4c5	250	mutex_unlock(&register_mutex);
1da177e4 LT	251	return 0;
	252	}
	253
	254	static void
	255	unregister_device(void)
	256	{
1a60d4c5	257	mutex_lock(&register_mutex);
1da177e4 LT	258	debug_printk(("device unregistered\n"));
	259	if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
	260	snd_printk(KERN_ERR "error unregister device music\n");
	261	if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
	262	snd_printk(KERN_ERR "error unregister device seq\n");
1a60d4c5	263	mutex_unlock(&register_mutex);
1da177e4 LT	264	}
	265
	266	/*
	267	* /proc interface
	268	*/
	269
	270	#ifdef CONFIG_PROC_FS
	271
080dece3	272	static struct snd_info_entry *info_entry;
1da177e4 LT	273
1da177e4 LT	274	static void
080dece3	275	info_read(struct snd_info_entry entry, struct snd_info_buffer buf)
1da177e4	276	{
1a60d4c5	277	mutex_lock(&register_mutex);
1da177e4 LT	278	snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
	279	snd_seq_oss_system_info_read(buf);
	280	snd_seq_oss_synth_info_read(buf);
	281	snd_seq_oss_midi_info_read(buf);
1a60d4c5	282	mutex_unlock(&register_mutex);
1da177e4 LT	283	}
1da177e4 LT	284
1da177e4 LT	285
	286	static int __init
	287	register_proc(void)
	288	{
080dece3	289	struct snd_info_entry *entry;
1da177e4 LT	290
	291	entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
	292	if (entry == NULL)
	293	return -ENOMEM;
	294
	295	entry->content = SNDRV_INFO_CONTENT_TEXT;
	296	entry->private_data = NULL;
1da177e4 LT	297	entry->c.text.read = info_read;
	298	if (snd_info_register(entry) < 0) {
	299	snd_info_free_entry(entry);
	300	return -ENOMEM;
	301	}
	302	info_entry = entry;
1da177e4 LT	303	return 0;
	304	}
	305
	306	static void
	307	unregister_proc(void)
	308	{
746d4a02	309	snd_info_free_entry(info_entry);
1da177e4	310	info_entry = NULL;
1da177e4	311	}
04f141a8	312	#endif /* CONFIG_PROC_FS */