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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/core/sound_oss.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'sound/core/sound_oss.c')
-rw-r--r--sound/core/sound_oss.c250
1 files changed, 250 insertions, 0 deletions
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c
new file mode 100644
index 000000000000..de39d212bc15
--- /dev/null
+++ b/sound/core/sound_oss.c
@@ -0,0 +1,250 @@
+/*
+ * Advanced Linux Sound Architecture
+ * Copyright (c) by Jaroslav Kysela <perex@suse.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
+ *
+ */
+
+#include <sound/driver.h>
+
+#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>
+
+#define SNDRV_OS_MINORS 256
+
+static struct list_head snd_oss_minors_hash[SNDRV_CARDS];
+
+static DECLARE_MUTEX(sound_oss_mutex);
+
+static snd_minor_t *snd_oss_minor_search(int minor)
+{
+ struct list_head *list;
+ snd_minor_t *mptr;
+
+ list_for_each(list, &snd_oss_minors_hash[SNDRV_MINOR_OSS_CARD(minor)]) {
+ mptr = list_entry(list, snd_minor_t, list);
+ if (mptr->number == minor)
+ return mptr;
+ }
+ return NULL;
+}
+
+static int snd_oss_kernel_minor(int type, snd_card_t * card, int dev)
+{
+ int minor;
+
+ switch (type) {
+ case SNDRV_OSS_DEVICE_TYPE_MIXER:
+ snd_assert(card != NULL && 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:
+ snd_assert(card != NULL && 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:
+ snd_assert(card != NULL && 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;
+ }
+ snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL);
+ return minor;
+}
+
+int snd_register_oss_device(int type, snd_card_t * card, int dev, snd_minor_t * reg, const char *name)
+{
+ int minor = snd_oss_kernel_minor(type, card, dev);
+ int minor_unit;
+ snd_minor_t *preg;
+ int cidx = SNDRV_MINOR_OSS_CARD(minor);
+ int track2 = -1;
+ int register1 = -1, register2 = -1;
+
+ if (minor < 0)
+ return minor;
+ preg = (snd_minor_t *)kmalloc(sizeof(snd_minor_t), GFP_KERNEL);
+ if (preg == NULL)
+ return -ENOMEM;
+ *preg = *reg;
+ preg->number = minor;
+ preg->device = dev;
+ down(&sound_oss_mutex);
+ list_add_tail(&preg->list, &snd_oss_minors_hash[cidx]);
+ 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(reg->f_ops, minor);
+ if (register1 != minor)
+ goto __end;
+ if (track2 >= 0) {
+ register2 = register_sound_special(reg->f_ops, track2);
+ if (register2 != track2)
+ goto __end;
+ }
+ up(&sound_oss_mutex);
+ return 0;
+
+ __end:
+ if (register2 >= 0)
+ unregister_sound_special(register2);
+ if (register1 >= 0)
+ unregister_sound_special(register1);
+ list_del(&preg->list);
+ up(&sound_oss_mutex);
+ kfree(preg);
+ return -EBUSY;
+}
+
+int snd_unregister_oss_device(int type, snd_card_t * card, int dev)
+{
+ int minor = snd_oss_kernel_minor(type, card, dev);
+ int cidx = SNDRV_MINOR_OSS_CARD(minor);
+ int track2 = -1;
+ snd_minor_t *mptr;
+
+ if (minor < 0)
+ return minor;
+ down(&sound_oss_mutex);
+ mptr = snd_oss_minor_search(minor);
+ if (mptr == NULL) {
+ up(&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);
+ list_del(&mptr->list);
+ up(&sound_oss_mutex);
+ kfree(mptr);
+ return 0;
+}
+
+/*
+ * INFO PART
+ */
+
+#ifdef CONFIG_PROC_FS
+
+static snd_info_entry_t *snd_minor_info_oss_entry = NULL;
+
+static void snd_minor_info_oss_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
+{
+ int card, dev;
+ struct list_head *list;
+ snd_minor_t *mptr;
+
+ down(&sound_oss_mutex);
+ for (card = 0; card < SNDRV_CARDS; card++) {
+ list_for_each(list, &snd_oss_minors_hash[card]) {
+ mptr = list_entry(list, snd_minor_t, list);
+ dev = SNDRV_MINOR_OSS_DEVICE(mptr->number);
+ if (dev != SNDRV_MINOR_OSS_SNDSTAT &&
+ dev != SNDRV_MINOR_OSS_SEQUENCER &&
+ dev != SNDRV_MINOR_OSS_MUSIC)
+ snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, dev, mptr->comment);
+ else
+ snd_iprintf(buffer, "%3i: : %s\n", mptr->number, mptr->comment);
+ }
+ }
+ up(&sound_oss_mutex);
+}
+
+#endif /* CONFIG_PROC_FS */
+
+int __init snd_minor_info_oss_init(void)
+{
+#ifdef CONFIG_PROC_FS
+ snd_info_entry_t *entry;
+
+ entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
+ if (entry) {
+ entry->c.text.read_size = PAGE_SIZE;
+ 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;
+#endif
+ return 0;
+}
+
+int __exit snd_minor_info_oss_done(void)
+{
+#ifdef CONFIG_PROC_FS
+ if (snd_minor_info_oss_entry)
+ snd_info_unregister(snd_minor_info_oss_entry);
+#endif
+ return 0;
+}
+
+int __init snd_oss_init_module(void)
+{
+ int card;
+
+ for (card = 0; card < SNDRV_CARDS; card++)
+ INIT_LIST_HEAD(&snd_oss_minors_hash[card]);
+ return 0;
+}
+
+#endif /* CONFIG_SND_OSSEMUL */