diff options
Diffstat (limited to 'sound/core/seq/oss/seq_oss.c')
| -rw-r--r-- | sound/core/seq/oss/seq_oss.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/sound/core/seq/oss/seq_oss.c b/sound/core/seq/oss/seq_oss.c new file mode 100644 index 00000000..a1f1a2f0 --- /dev/null +++ b/sound/core/seq/oss/seq_oss.c @@ -0,0 +1,312 @@ +/* + * 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(®ister_mutex); + rc = snd_seq_oss_open(file, level); + mutex_unlock(®ister_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(®ister_mutex); + snd_seq_oss_release(dp); + mutex_unlock(®ister_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(®ister_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(®ister_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(®ister_mutex); + return rc; + } + debug_printk(("device registered\n")); + mutex_unlock(®ister_mutex); + return 0; +} + +static void +unregister_device(void) +{ + mutex_lock(®ister_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(®ister_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(®ister_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(®ister_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 */ |