--- /dev/null
+/*
+ * 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/module.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);
+
+
+/*
+ * 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 struct snd_seq_driver seq_oss_synth_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .probe = snd_seq_oss_synth_probe,
+ .remove = snd_seq_oss_synth_remove,
+ },
+ .id = SNDRV_SEQ_DEV_ID_OSS,
+ .argsize = sizeof(struct snd_seq_oss_reg),
+};
+
+static int __init alsa_seq_oss_init(void)
+{
+ int rc;
+
+ 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;
+ }
+
+ rc = snd_seq_driver_register(&seq_oss_synth_driver);
+ if (rc < 0) {
+ snd_seq_oss_delete_client();
+ unregister_proc();
+ unregister_device();
+ goto error;
+ }
+
+ /* success */
+ snd_seq_oss_synth_init();
+
+ error:
+ return rc;
+}
+
+static void __exit alsa_seq_oss_exit(void)
+{
+ snd_seq_driver_unregister(&seq_oss_synth_driver);
+ 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)) < 0) {
+ pr_err("ALSA: seq_oss: 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)) < 0) {
+ pr_err("ALSA: seq_oss: can't register device music\n");
+ snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
+ mutex_unlock(®ister_mutex);
+ return rc;
+ }
+ mutex_unlock(®ister_mutex);
+ return 0;
+}
+
+static void
+unregister_device(void)
+{
+ mutex_lock(®ister_mutex);
+ if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
+ pr_err("ALSA: seq_oss: error unregister device music\n");
+ if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
+ pr_err("ALSA: seq_oss: 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 */
Code Review / kvmfornfv.git / blobdiff