#include <sound/control.h>
#include <sound/initval.h>
#include <linux/kmod.h>
-#include <linux/mutex.h>
+#include <linux/devfs_fs_kernel.h>
#define SNDRV_OS_MINORS 256
static int major = CONFIG_SND_MAJOR;
int snd_major;
-EXPORT_SYMBOL(snd_major);
-
static int cards_limit = 1;
+static int device_mode = S_IFCHR | S_IRUGO | S_IWUGO;
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Advanced Linux Sound Architecture driver for soundcards.");
MODULE_PARM_DESC(major, "Major # for sound driver.");
module_param(cards_limit, int, 0444);
MODULE_PARM_DESC(cards_limit, "Count of auto-loadable soundcards.");
+#ifdef CONFIG_DEVFS_FS
+module_param(device_mode, int, 0444);
+MODULE_PARM_DESC(device_mode, "Device file permission mask for devfs.");
+#endif
MODULE_ALIAS_CHARDEV_MAJOR(CONFIG_SND_MAJOR);
/* this one holds the actual max. card number currently available.
* modules are loaded manually, this limit number increases, too.
*/
int snd_ecards_limit;
-EXPORT_SYMBOL(snd_ecards_limit);
static struct snd_minor *snd_minors[SNDRV_OS_MINORS];
-static DEFINE_MUTEX(sound_mutex);
+static DECLARE_MUTEX(sound_mutex);
extern struct class *sound_class;
*/
void snd_request_card(int card)
{
+ int locked;
+
if (! current->fs->root)
return;
- if (snd_card_locked(card))
+ read_lock(&snd_card_rwlock);
+ locked = snd_cards_lock & (1 << card);
+ read_unlock(&snd_card_rwlock);
+ if (locked)
return;
if (card < 0 || card >= cards_limit)
return;
request_module("snd-card-%i", card);
}
-EXPORT_SYMBOL(snd_request_card);
-
static void snd_request_other(int minor)
{
char *str;
if (minor >= ARRAY_SIZE(snd_minors))
return NULL;
- mutex_lock(&sound_mutex);
+ down(&sound_mutex);
mreg = snd_minors[minor];
if (mreg && mreg->type == type)
private_data = mreg->private_data;
else
private_data = NULL;
- mutex_unlock(&sound_mutex);
+ up(&sound_mutex);
return private_data;
}
-EXPORT_SYMBOL(snd_lookup_minor_data);
-
static int snd_open(struct inode *inode, struct file *file)
{
unsigned int minor = iminor(inode);
struct snd_minor *mptr = NULL;
- const struct file_operations *old_fops;
+ struct file_operations *old_fops;
int err = 0;
if (minor >= ARRAY_SIZE(snd_minors))
* Retrurns zero if successful, or a negative error code on failure.
*/
int snd_register_device(int type, struct snd_card *card, int dev,
- const struct file_operations *f_ops, void *private_data,
+ struct file_operations *f_ops, void *private_data,
const char *name)
{
int minor;
struct device *device = NULL;
snd_assert(name, return -EINVAL);
- preg = kmalloc(sizeof *preg, GFP_KERNEL);
+ preg = kmalloc(sizeof(struct snd_minor) + strlen(name) + 1, GFP_KERNEL);
if (preg == NULL)
return -ENOMEM;
preg->type = type;
preg->device = dev;
preg->f_ops = f_ops;
preg->private_data = private_data;
- mutex_lock(&sound_mutex);
+ strcpy(preg->name, name);
+ down(&sound_mutex);
#ifdef CONFIG_SND_DYNAMIC_MINORS
minor = snd_find_free_minor();
#else
minor = -EBUSY;
#endif
if (minor < 0) {
- mutex_unlock(&sound_mutex);
+ up(&sound_mutex);
kfree(preg);
return minor;
}
snd_minors[minor] = preg;
+ if (type != SNDRV_DEVICE_TYPE_CONTROL || preg->card >= cards_limit)
+ devfs_mk_cdev(MKDEV(major, minor), S_IFCHR | device_mode, "snd/%s", name);
if (card)
device = card->dev;
class_device_create(sound_class, NULL, MKDEV(major, minor), device, "%s", name);
- mutex_unlock(&sound_mutex);
+ up(&sound_mutex);
return 0;
}
-EXPORT_SYMBOL(snd_register_device);
-
/**
* snd_unregister_device - unregister the device on the given card
* @type: the device type, SNDRV_DEVICE_TYPE_XXX
struct snd_minor *mptr;
cardnum = card ? card->number : -1;
- mutex_lock(&sound_mutex);
+ down(&sound_mutex);
for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor)
if ((mptr = snd_minors[minor]) != NULL &&
mptr->type == type &&
mptr->device == dev)
break;
if (minor == ARRAY_SIZE(snd_minors)) {
- mutex_unlock(&sound_mutex);
+ up(&sound_mutex);
return -EINVAL;
}
+ if (mptr->type != SNDRV_DEVICE_TYPE_CONTROL ||
+ mptr->card >= cards_limit) /* created in sound.c */
+ devfs_remove("snd/%s", mptr->name);
class_device_destroy(sound_class, MKDEV(major, minor));
snd_minors[minor] = NULL;
- mutex_unlock(&sound_mutex);
+ up(&sound_mutex);
kfree(mptr);
return 0;
}
-EXPORT_SYMBOL(snd_unregister_device);
-
#ifdef CONFIG_PROC_FS
/*
* INFO PART
*/
-static struct snd_info_entry *snd_minor_info_entry;
+static struct snd_info_entry *snd_minor_info_entry = NULL;
static const char *snd_device_type_name(int type)
{
int minor;
struct snd_minor *mptr;
- mutex_lock(&sound_mutex);
+ down(&sound_mutex);
for (minor = 0; minor < SNDRV_OS_MINORS; ++minor) {
if (!(mptr = snd_minors[minor]))
continue;
snd_iprintf(buffer, "%3i: : %s\n", minor,
snd_device_type_name(mptr->type));
}
- mutex_unlock(&sound_mutex);
+ up(&sound_mutex);
}
int __init snd_minor_info_init(void)
entry = snd_info_create_module_entry(THIS_MODULE, "devices", NULL);
if (entry) {
+ entry->c.text.read_size = PAGE_SIZE;
entry->c.text.read = snd_minor_info_read;
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
static int __init alsa_sound_init(void)
{
+ short controlnum;
+
snd_major = major;
snd_ecards_limit = cards_limit;
+ devfs_mk_dir("snd");
if (register_chrdev(major, "alsa", &snd_fops)) {
snd_printk(KERN_ERR "unable to register native major device number %d\n", major);
+ devfs_remove("snd");
return -EIO;
}
if (snd_info_init() < 0) {
unregister_chrdev(major, "alsa");
+ devfs_remove("snd");
return -ENOMEM;
}
snd_info_minor_register();
+ for (controlnum = 0; controlnum < cards_limit; controlnum++)
+ devfs_mk_cdev(MKDEV(major, controlnum<<5), S_IFCHR | device_mode, "snd/controlC%d", controlnum);
#ifndef MODULE
printk(KERN_INFO "Advanced Linux Sound Architecture Driver Version " CONFIG_SND_VERSION CONFIG_SND_DATE ".\n");
#endif
static void __exit alsa_sound_exit(void)
{
+ short controlnum;
+
+ for (controlnum = 0; controlnum < cards_limit; controlnum++)
+ devfs_remove("snd/controlC%d", controlnum);
+
snd_info_minor_unregister();
snd_info_done();
if (unregister_chrdev(major, "alsa") != 0)
snd_printk(KERN_ERR "unable to unregister major device number %d\n", major);
+ devfs_remove("snd");
}
module_init(alsa_sound_init)
module_exit(alsa_sound_exit)
+
+ /* sound.c */
+EXPORT_SYMBOL(snd_major);
+EXPORT_SYMBOL(snd_ecards_limit);
+#if defined(CONFIG_KMOD)
+EXPORT_SYMBOL(snd_request_card);
+#endif
+EXPORT_SYMBOL(snd_register_device);
+EXPORT_SYMBOL(snd_unregister_device);
+EXPORT_SYMBOL(snd_lookup_minor_data);
+#if defined(CONFIG_SND_OSSEMUL)
+EXPORT_SYMBOL(snd_register_oss_device);
+EXPORT_SYMBOL(snd_unregister_oss_device);
+EXPORT_SYMBOL(snd_lookup_oss_minor_data);
+#endif
+ /* memory.c */
+EXPORT_SYMBOL(copy_to_user_fromio);
+EXPORT_SYMBOL(copy_from_user_toio);
+ /* init.c */
+EXPORT_SYMBOL(snd_cards);
+#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
+EXPORT_SYMBOL(snd_mixer_oss_notify_callback);
+#endif
+EXPORT_SYMBOL(snd_card_new);
+EXPORT_SYMBOL(snd_card_disconnect);
+EXPORT_SYMBOL(snd_card_free);
+EXPORT_SYMBOL(snd_card_free_in_thread);
+EXPORT_SYMBOL(snd_card_register);
+EXPORT_SYMBOL(snd_component_add);
+EXPORT_SYMBOL(snd_card_file_add);
+EXPORT_SYMBOL(snd_card_file_remove);
+#ifdef CONFIG_PM
+EXPORT_SYMBOL(snd_power_wait);
+#endif
+ /* device.c */
+EXPORT_SYMBOL(snd_device_new);
+EXPORT_SYMBOL(snd_device_register);
+EXPORT_SYMBOL(snd_device_free);
+ /* isadma.c */
+#ifdef CONFIG_ISA_DMA_API
+EXPORT_SYMBOL(snd_dma_program);
+EXPORT_SYMBOL(snd_dma_disable);
+EXPORT_SYMBOL(snd_dma_pointer);
+#endif
+ /* info.c */
+#ifdef CONFIG_PROC_FS
+EXPORT_SYMBOL(snd_seq_root);
+EXPORT_SYMBOL(snd_iprintf);
+EXPORT_SYMBOL(snd_info_get_line);
+EXPORT_SYMBOL(snd_info_get_str);
+EXPORT_SYMBOL(snd_info_create_module_entry);
+EXPORT_SYMBOL(snd_info_create_card_entry);
+EXPORT_SYMBOL(snd_info_free_entry);
+EXPORT_SYMBOL(snd_info_register);
+EXPORT_SYMBOL(snd_info_unregister);
+EXPORT_SYMBOL(snd_card_proc_new);
+#endif
+ /* info_oss.c */
+#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
+EXPORT_SYMBOL(snd_oss_info_register);
+#endif
+ /* control.c */
+EXPORT_SYMBOL(snd_ctl_new);
+EXPORT_SYMBOL(snd_ctl_new1);
+EXPORT_SYMBOL(snd_ctl_free_one);
+EXPORT_SYMBOL(snd_ctl_add);
+EXPORT_SYMBOL(snd_ctl_remove);
+EXPORT_SYMBOL(snd_ctl_remove_id);
+EXPORT_SYMBOL(snd_ctl_rename_id);
+EXPORT_SYMBOL(snd_ctl_find_numid);
+EXPORT_SYMBOL(snd_ctl_find_id);
+EXPORT_SYMBOL(snd_ctl_notify);
+EXPORT_SYMBOL(snd_ctl_register_ioctl);
+EXPORT_SYMBOL(snd_ctl_unregister_ioctl);
+#ifdef CONFIG_COMPAT
+EXPORT_SYMBOL(snd_ctl_register_ioctl_compat);
+EXPORT_SYMBOL(snd_ctl_unregister_ioctl_compat);
+#endif
+EXPORT_SYMBOL(snd_ctl_elem_read);
+EXPORT_SYMBOL(snd_ctl_elem_write);
+ /* misc.c */
+EXPORT_SYMBOL(release_and_free_resource);
+#ifdef CONFIG_SND_VERBOSE_PRINTK
+EXPORT_SYMBOL(snd_verbose_printk);
+#endif
+#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
+EXPORT_SYMBOL(snd_verbose_printd);
+#endif
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