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Diffstat (limited to 'sound/core/sound_oss.c')
-rw-r--r--sound/core/sound_oss.c138
1 files changed, 79 insertions, 59 deletions
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c
index e401c6703297..d0be32b517c1 100644
--- a/sound/core/sound_oss.c
+++ b/sound/core/sound_oss.c
@@ -35,26 +35,29 @@
#include <sound/info.h>
#include <linux/sound.h>
-#define SNDRV_OS_MINORS 256
-
-static struct list_head snd_oss_minors_hash[SNDRV_CARDS];
+#define SNDRV_OSS_MINORS 128
+static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS];
static DECLARE_MUTEX(sound_oss_mutex);
-static snd_minor_t *snd_oss_minor_search(int minor)
+void *snd_lookup_oss_minor_data(unsigned int minor, int type)
{
- struct list_head *list;
- snd_minor_t *mptr;
+ struct snd_minor *mreg;
+ void *private_data;
- 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;
+ if (minor > ARRAY_SIZE(snd_oss_minors))
+ return NULL;
+ down(&sound_oss_mutex);
+ mreg = snd_oss_minors[minor];
+ if (mreg && mreg->type == type)
+ private_data = mreg->private_data;
+ else
+ private_data = NULL;
+ up(&sound_oss_mutex);
+ return private_data;
}
-static int snd_oss_kernel_minor(int type, snd_card_t * card, int dev)
+static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
{
int minor;
@@ -86,30 +89,36 @@ static int snd_oss_kernel_minor(int type, snd_card_t * card, int dev)
default:
return -EINVAL;
}
- snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL);
+ snd_assert(minor >= 0 && minor < SNDRV_OSS_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 snd_register_oss_device(int type, struct snd_card *card, int dev,
+ struct file_operations *f_ops, void *private_data,
+ const char *name)
{
int minor = snd_oss_kernel_minor(type, card, dev);
int minor_unit;
- snd_minor_t *preg;
+ struct snd_minor *preg;
int cidx = SNDRV_MINOR_OSS_CARD(minor);
int track2 = -1;
int register1 = -1, register2 = -1;
struct device *carddev = NULL;
+ if (card && card->number >= 8)
+ return 0; /* ignore silently */
if (minor < 0)
return minor;
- preg = (snd_minor_t *)kmalloc(sizeof(snd_minor_t), GFP_KERNEL);
+ preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
if (preg == NULL)
return -ENOMEM;
- *preg = *reg;
- preg->number = minor;
+ preg->type = type;
+ preg->card = card ? card->number : -1;
preg->device = dev;
+ preg->f_ops = f_ops;
+ preg->private_data = private_data;
down(&sound_oss_mutex);
- list_add_tail(&preg->list, &snd_oss_minors_hash[cidx]);
+ snd_oss_minors[minor] = preg;
minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
switch (minor_unit) {
case SNDRV_MINOR_OSS_PCM:
@@ -124,13 +133,15 @@ int snd_register_oss_device(int type, snd_card_t * card, int dev, snd_minor_t *
}
if (card)
carddev = card->dev;
- register1 = register_sound_special_device(reg->f_ops, minor, carddev);
+ register1 = register_sound_special_device(f_ops, minor, carddev);
if (register1 != minor)
goto __end;
if (track2 >= 0) {
- register2 = register_sound_special_device(reg->f_ops, track2, carddev);
+ register2 = register_sound_special_device(f_ops, track2,
+ carddev);
if (register2 != track2)
goto __end;
+ snd_oss_minors[track2] = preg;
}
up(&sound_oss_mutex);
return 0;
@@ -140,23 +151,25 @@ int snd_register_oss_device(int type, snd_card_t * card, int dev, snd_minor_t *
unregister_sound_special(register2);
if (register1 >= 0)
unregister_sound_special(register1);
- list_del(&preg->list);
+ snd_oss_minors[minor] = NULL;
up(&sound_oss_mutex);
kfree(preg);
return -EBUSY;
}
-int snd_unregister_oss_device(int type, snd_card_t * card, int dev)
+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;
- snd_minor_t *mptr;
+ struct snd_minor *mptr;
+ if (card && card->number >= 8)
+ return 0;
if (minor < 0)
return minor;
down(&sound_oss_mutex);
- mptr = snd_oss_minor_search(minor);
+ mptr = snd_oss_minors[minor];
if (mptr == NULL) {
up(&sound_oss_mutex);
return -ENOENT;
@@ -173,9 +186,11 @@ int snd_unregister_oss_device(int type, snd_card_t * card, int dev)
track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
break;
}
- if (track2 >= 0)
+ if (track2 >= 0) {
unregister_sound_special(track2);
- list_del(&mptr->list);
+ snd_oss_minors[track2] = NULL;
+ }
+ snd_oss_minors[minor] = NULL;
up(&sound_oss_mutex);
kfree(mptr);
return 0;
@@ -187,36 +202,52 @@ int snd_unregister_oss_device(int type, snd_card_t * card, int dev)
#ifdef CONFIG_PROC_FS
-static snd_info_entry_t *snd_minor_info_oss_entry = NULL;
+static struct snd_info_entry *snd_minor_info_oss_entry = NULL;
+
+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(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
+static void snd_minor_info_oss_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
{
- int card, dev;
- struct list_head *list;
- snd_minor_t *mptr;
+ int minor;
+ struct snd_minor *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);
- }
+ 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));
}
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;
+ struct snd_info_entry *entry;
entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
if (entry) {
@@ -228,26 +259,15 @@ int __init snd_minor_info_oss_init(void)
}
}
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_PROC_FS */
#endif /* CONFIG_SND_OSSEMUL */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.