[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 <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);
static int register_proc(void);
static void unregister_proc(void);

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);
#ifdef CONFIG_PROC_FS
static void info_read(snd_info_entry_t *entry, snd_info_buffer_t *buf);
#endif


/*
 * module interface
 */

static int __init alsa_seq_oss_init(void)
{
	int rc;
	static snd_seq_dev_ops_t 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(snd_seq_oss_reg_t))) < 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 DECLARE_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;

	down(&register_mutex);
	rc = snd_seq_oss_open(file, level);
	up(&register_mutex);

	return rc;
}

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

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

	snd_seq_oss_drain_write(dp);

	down(&register_mutex);
	snd_seq_oss_release(dp);
	up(&register_mutex);

	return 0;
}

static ssize_t
odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
{
	seq_oss_devinfo_t *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)
{
	seq_oss_devinfo_t *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)
{
	seq_oss_devinfo_t *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)
{
	seq_oss_devinfo_t *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 snd_minor_t seq_oss_reg = {
	.comment =	"sequencer",
	.f_ops =	&seq_oss_f_ops,
};

static int __init
register_device(void)
{
	int rc;

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

static void
unregister_device(void)
{
	down(&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");
	up(&register_mutex);
}

/*
 * /proc interface
 */

#ifdef CONFIG_PROC_FS

static snd_info_entry_t *info_entry;

static void
info_read(snd_info_entry_t *entry, snd_info_buffer_t *buf)
{
	down(&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);
	up(&register_mutex);
}

#endif /* CONFIG_PROC_FS */

static int __init
register_proc(void)
{
#ifdef CONFIG_PROC_FS
	snd_info_entry_t *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_size = 1024;
	entry->c.text.read = info_read;
	if (snd_info_register(entry) < 0) {
		snd_info_free_entry(entry);
		return -ENOMEM;
	}
	info_entry = entry;
#endif
	return 0;
}

static void
unregister_proc(void)
{
#ifdef CONFIG_PROC_FS
	if (info_entry)
		snd_info_unregister(info_entry);
	info_entry = NULL;
#endif
}
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>
	27	#include <sound/core.h>
	28	#include <sound/minors.h>
	29	#include <sound/initval.h>
	30	#include "seq_oss_device.h"
	31	#include "seq_oss_synth.h"
	32
	33	/*
	34	* module option
	35	*/
	36	MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
	37	MODULE_DESCRIPTION("OSS-compatible sequencer module");
	38	MODULE_LICENSE("GPL");
	39	/* Takashi says this is really only for sound-service-0-, but this is OK. */
	40	MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_SEQUENCER);
	41	MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MUSIC);
	42
	43	#ifdef SNDRV_SEQ_OSS_DEBUG
	44	module_param(seq_oss_debug, int, 0644);
	45	MODULE_PARM_DESC(seq_oss_debug, "debug option");
	46	int seq_oss_debug = 0;
	47	#endif
	48
	49
	50	/*
	51	* prototypes
	52	*/
	53	static int register_device(void);
	54	static void unregister_device(void);
	55	static int register_proc(void);
	56	static void unregister_proc(void);
	57
	58	static int odev_open(struct inode inode, struct file file);
	59	static int odev_release(struct inode inode, struct file file);
	60	static ssize_t odev_read(struct file file, char __user buf, size_t count, loff_t *offset);
	61	static ssize_t odev_write(struct file file, const char __user buf, size_t count, loff_t *offset);
	62	static long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
	63	static unsigned int odev_poll(struct file file, poll_table wait);
	64	#ifdef CONFIG_PROC_FS
65	static void info_read(snd_info_entry_t entry, snd_info_buffer_t buf);
66	#endif
67
68
69	/*
70	* module interface
71	*/
72
73	static int __init alsa_seq_oss_init(void)
74	{
75	int rc;
76	static snd_seq_dev_ops_t ops = {
77	snd_seq_oss_synth_register,
78	snd_seq_oss_synth_unregister,
79	};
80
81	snd_seq_autoload_lock();
82	if ((rc = register_device()) < 0)
83	goto error;
84	if ((rc = register_proc()) < 0) {
85	unregister_device();
86	goto error;
87	}
88	if ((rc = snd_seq_oss_create_client()) < 0) {
89	unregister_proc();
90	unregister_device();
91	goto error;
92	}
93
94	if ((rc = snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OSS, &ops,
95	sizeof(snd_seq_oss_reg_t))) < 0) {
96	snd_seq_oss_delete_client();
97	unregister_proc();
98	unregister_device();
99	goto error;
100	}
101
102	/* success */
103	snd_seq_oss_synth_init();
104
105	error:
106	snd_seq_autoload_unlock();
107	return rc;
108	}
109
110	static void __exit alsa_seq_oss_exit(void)
111	{
112	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OSS);
113	snd_seq_oss_delete_client();
114	unregister_proc();
115	unregister_device();
116	}
117
118	module_init(alsa_seq_oss_init)
119	module_exit(alsa_seq_oss_exit)
120
121	/*
122	* ALSA minor device interface
123	*/
124
125	static DECLARE_MUTEX(register_mutex);
126
127	static int
128	odev_open(struct inode inode, struct file file)
129	{
130	int level, rc;
131
132	if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
133	level = SNDRV_SEQ_OSS_MODE_MUSIC;
134	else
135	level = SNDRV_SEQ_OSS_MODE_SYNTH;
136
137	down(&register_mutex);
138	rc = snd_seq_oss_open(file, level);
139	up(&register_mutex);
140
141	return rc;
142	}
143
144	static int
145	odev_release(struct inode inode, struct file file)
146	{
147	seq_oss_devinfo_t *dp;
148
149	if ((dp = file->private_data) == NULL)
150	return 0;
151
152	snd_seq_oss_drain_write(dp);
153
154	down(&register_mutex);
155	snd_seq_oss_release(dp);
156	up(&register_mutex);
157
158	return 0;
159	}
160
161	static ssize_t
162	odev_read(struct file file, char __user buf, size_t count, loff_t *offset)
163	{
164	seq_oss_devinfo_t *dp;
165	dp = file->private_data;
166	snd_assert(dp != NULL, return -EIO);
167	return snd_seq_oss_read(dp, buf, count);
168	}
169
170
171	static ssize_t
172	odev_write(struct file file, const char __user buf, size_t count, loff_t *offset)
173	{
174	seq_oss_devinfo_t *dp;
175	dp = file->private_data;
176	snd_assert(dp != NULL, return -EIO);
177	return snd_seq_oss_write(dp, buf, count, file);
178	}
179
180	static long
181	odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
182	{
183	seq_oss_devinfo_t *dp;
184	dp = file->private_data;
185	snd_assert(dp != NULL, return -EIO);
186	return snd_seq_oss_ioctl(dp, cmd, arg);
187	}
188
189	#ifdef CONFIG_COMPAT
190	#define odev_ioctl_compat odev_ioctl
191	#else
192	#define odev_ioctl_compat NULL
193	#endif
194
195	static unsigned int
196	odev_poll(struct file file, poll_table wait)
197	{
198	seq_oss_devinfo_t *dp;
199	dp = file->private_data;
200	snd_assert(dp != NULL, return 0);
201	return snd_seq_oss_poll(dp, file, wait);
202	}
203
204	/*
205	* registration of sequencer minor device
206	*/
207
208	static struct file_operations seq_oss_f_ops =
209	{
210	.owner = THIS_MODULE,
211	.read = odev_read,
212	.write = odev_write,
213	.open = odev_open,
214	.release = odev_release,
215	.poll = odev_poll,
216	.unlocked_ioctl = odev_ioctl,
217	.compat_ioctl = odev_ioctl_compat,
218	};
219
220	static snd_minor_t seq_oss_reg = {
221	.comment = "sequencer",
222	.f_ops = &seq_oss_f_ops,
223	};
224
225	static int __init
226	register_device(void)
227	{
228	int rc;
229
230	down(&register_mutex);
231	if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
232	NULL, 0,
233	&seq_oss_reg,
234	SNDRV_SEQ_OSS_DEVNAME)) < 0) {
235	snd_printk(KERN_ERR "can't register device seq\n");
236	up(&register_mutex);
237	return rc;
238	}
239	if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
240	NULL, 0,
241	&seq_oss_reg,
242	SNDRV_SEQ_OSS_DEVNAME)) < 0) {
243	snd_printk(KERN_ERR "can't register device music\n");
244	snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
245	up(&register_mutex);
246	return rc;
247	}
248	debug_printk(("device registered\n"));
249	up(&register_mutex);
250	return 0;
251	}
252
253	static void
254	unregister_device(void)
255	{
256	down(&register_mutex);
257	debug_printk(("device unregistered\n"));
258	if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
259	snd_printk(KERN_ERR "error unregister device music\n");
260	if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
261	snd_printk(KERN_ERR "error unregister device seq\n");
262	up(&register_mutex);
263	}
264
265	/*
266	* /proc interface
267	*/
268
269	#ifdef CONFIG_PROC_FS
270
271	static snd_info_entry_t *info_entry;
272
273	static void
274	info_read(snd_info_entry_t entry, snd_info_buffer_t buf)
275	{
276	down(&register_mutex);
277	snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
278	snd_seq_oss_system_info_read(buf);
279	snd_seq_oss_synth_info_read(buf);
280	snd_seq_oss_midi_info_read(buf);
281	up(&register_mutex);
282	}
283
284	#endif /* CONFIG_PROC_FS */
285
286	static int __init
287	register_proc(void)
288	{
289	#ifdef CONFIG_PROC_FS
290	snd_info_entry_t *entry;
291
292	entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
293	if (entry == NULL)
294	return -ENOMEM;
295
296	entry->content = SNDRV_INFO_CONTENT_TEXT;
297	entry->private_data = NULL;
298	entry->c.text.read_size = 1024;
299	entry->c.text.read = info_read;
300	if (snd_info_register(entry) < 0) {
301	snd_info_free_entry(entry);
302	return -ENOMEM;
303	}
304	info_entry = entry;
305	#endif
306	return 0;
307	}
308
309	static void
310	unregister_proc(void)
311	{
312	#ifdef CONFIG_PROC_FS
313	if (info_entry)
314	snd_info_unregister(info_entry);
315	info_entry = NULL;
316	#endif
317	}