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-rw-r--r--sound/core/sound_oss.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c
new file mode 100644
index 00000000..0c164e5e
--- /dev/null
+++ b/sound/core/sound_oss.c
@@ -0,0 +1,278 @@
+/*
+ * Advanced Linux Sound Architecture
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *
+ *
+ * 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
+ *
+ */
+
+#ifdef CONFIG_SND_OSSEMUL
+
+#if !defined(CONFIG_SOUND) && !(defined(MODULE) && defined(CONFIG_SOUND_MODULE))
+#error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel."
+#endif
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/minors.h>
+#include <sound/info.h>
+#include <linux/sound.h>
+#include <linux/mutex.h>
+
+#define SNDRV_OSS_MINORS 128
+
+static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS];
+static DEFINE_MUTEX(sound_oss_mutex);
+
+void *snd_lookup_oss_minor_data(unsigned int minor, int type)
+{
+ struct snd_minor *mreg;
+ void *private_data;
+
+ if (minor >= ARRAY_SIZE(snd_oss_minors))
+ return NULL;
+ mutex_lock(&sound_oss_mutex);
+ mreg = snd_oss_minors[minor];
+ if (mreg && mreg->type == type)
+ private_data = mreg->private_data;
+ else
+ private_data = NULL;
+ mutex_unlock(&sound_oss_mutex);
+ return private_data;
+}
+
+EXPORT_SYMBOL(snd_lookup_oss_minor_data);
+
+static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
+{
+ int minor;
+
+ switch (type) {
+ case SNDRV_OSS_DEVICE_TYPE_MIXER:
+ if (snd_BUG_ON(!card || dev < 0 || dev > 1))
+ return -EINVAL;
+ minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
+ break;
+ case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
+ minor = SNDRV_MINOR_OSS_SEQUENCER;
+ break;
+ case SNDRV_OSS_DEVICE_TYPE_MUSIC:
+ minor = SNDRV_MINOR_OSS_MUSIC;
+ break;
+ case SNDRV_OSS_DEVICE_TYPE_PCM:
+ if (snd_BUG_ON(!card || dev < 0 || dev > 1))
+ return -EINVAL;
+ minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
+ break;
+ case SNDRV_OSS_DEVICE_TYPE_MIDI:
+ if (snd_BUG_ON(!card || dev < 0 || dev > 1))
+ return -EINVAL;
+ minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
+ break;
+ case SNDRV_OSS_DEVICE_TYPE_DMFM:
+ minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM);
+ break;
+ case SNDRV_OSS_DEVICE_TYPE_SNDSTAT:
+ minor = SNDRV_MINOR_OSS_SNDSTAT;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (minor < 0 || minor >= SNDRV_OSS_MINORS)
+ return -EINVAL;
+ return minor;
+}
+
+int snd_register_oss_device(int type, struct snd_card *card, int dev,
+ const struct file_operations *f_ops, void *private_data,
+ const char *name)
+{
+ int minor = snd_oss_kernel_minor(type, card, dev);
+ int minor_unit;
+ struct snd_minor *preg;
+ int cidx = SNDRV_MINOR_OSS_CARD(minor);
+ int track2 = -1;
+ int register1 = -1, register2 = -1;
+ struct device *carddev = snd_card_get_device_link(card);
+
+ if (card && card->number >= 8)
+ return 0; /* ignore silently */
+ if (minor < 0)
+ return minor;
+ preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
+ if (preg == NULL)
+ return -ENOMEM;
+ preg->type = type;
+ preg->card = card ? card->number : -1;
+ preg->device = dev;
+ preg->f_ops = f_ops;
+ preg->private_data = private_data;
+ mutex_lock(&sound_oss_mutex);
+ snd_oss_minors[minor] = preg;
+ minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
+ switch (minor_unit) {
+ case SNDRV_MINOR_OSS_PCM:
+ track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
+ break;
+ case SNDRV_MINOR_OSS_MIDI:
+ track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
+ break;
+ case SNDRV_MINOR_OSS_MIDI1:
+ track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
+ break;
+ }
+ register1 = register_sound_special_device(f_ops, minor, carddev);
+ if (register1 != minor)
+ goto __end;
+ if (track2 >= 0) {
+ register2 = register_sound_special_device(f_ops, track2,
+ carddev);
+ if (register2 != track2)
+ goto __end;
+ snd_oss_minors[track2] = preg;
+ }
+ mutex_unlock(&sound_oss_mutex);
+ return 0;
+
+ __end:
+ if (register2 >= 0)
+ unregister_sound_special(register2);
+ if (register1 >= 0)
+ unregister_sound_special(register1);
+ snd_oss_minors[minor] = NULL;
+ mutex_unlock(&sound_oss_mutex);
+ kfree(preg);
+ return -EBUSY;
+}
+
+EXPORT_SYMBOL(snd_register_oss_device);
+
+int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
+{
+ int minor = snd_oss_kernel_minor(type, card, dev);
+ int cidx = SNDRV_MINOR_OSS_CARD(minor);
+ int track2 = -1;
+ struct snd_minor *mptr;
+
+ if (card && card->number >= 8)
+ return 0;
+ if (minor < 0)
+ return minor;
+ mutex_lock(&sound_oss_mutex);
+ mptr = snd_oss_minors[minor];
+ if (mptr == NULL) {
+ mutex_unlock(&sound_oss_mutex);
+ return -ENOENT;
+ }
+ unregister_sound_special(minor);
+ switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
+ case SNDRV_MINOR_OSS_PCM:
+ track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
+ break;
+ case SNDRV_MINOR_OSS_MIDI:
+ track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
+ break;
+ case SNDRV_MINOR_OSS_MIDI1:
+ track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
+ break;
+ }
+ if (track2 >= 0) {
+ unregister_sound_special(track2);
+ snd_oss_minors[track2] = NULL;
+ }
+ snd_oss_minors[minor] = NULL;
+ mutex_unlock(&sound_oss_mutex);
+ kfree(mptr);
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_unregister_oss_device);
+
+/*
+ * INFO PART
+ */
+
+#ifdef CONFIG_PROC_FS
+
+static struct snd_info_entry *snd_minor_info_oss_entry;
+
+static const char *snd_oss_device_type_name(int type)
+{
+ switch (type) {
+ case SNDRV_OSS_DEVICE_TYPE_MIXER:
+ return "mixer";
+ case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
+ case SNDRV_OSS_DEVICE_TYPE_MUSIC:
+ return "sequencer";
+ case SNDRV_OSS_DEVICE_TYPE_PCM:
+ return "digital audio";
+ case SNDRV_OSS_DEVICE_TYPE_MIDI:
+ return "raw midi";
+ case SNDRV_OSS_DEVICE_TYPE_DMFM:
+ return "hardware dependent";
+ default:
+ return "?";
+ }
+}
+
+static void snd_minor_info_oss_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ int minor;
+ struct snd_minor *mptr;
+
+ mutex_lock(&sound_oss_mutex);
+ for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) {
+ if (!(mptr = snd_oss_minors[minor]))
+ continue;
+ if (mptr->card >= 0)
+ snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor,
+ mptr->card, mptr->device,
+ snd_oss_device_type_name(mptr->type));
+ else
+ snd_iprintf(buffer, "%3i: : %s\n", minor,
+ snd_oss_device_type_name(mptr->type));
+ }
+ mutex_unlock(&sound_oss_mutex);
+}
+
+
+int __init snd_minor_info_oss_init(void)
+{
+ struct snd_info_entry *entry;
+
+ entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
+ if (entry) {
+ entry->c.text.read = snd_minor_info_oss_read;
+ if (snd_info_register(entry) < 0) {
+ snd_info_free_entry(entry);
+ entry = NULL;
+ }
+ }
+ snd_minor_info_oss_entry = entry;
+ return 0;
+}
+
+int __exit snd_minor_info_oss_done(void)
+{
+ snd_info_free_entry(snd_minor_info_oss_entry);
+ return 0;
+}
+#endif /* CONFIG_PROC_FS */
+
+#endif /* CONFIG_SND_OSSEMUL */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 03:25:26 +0000