/*
* Initialization routines
- * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
*
* This program is free software; you can redistribute it and/or modify
*
*/
-#include <sound/driver.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/file.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/ctype.h>
-#include <linux/pci.h>
#include <linux/pm.h>
+
#include <sound/core.h>
#include <sound/control.h>
#include <sound/info.h>
-struct snd_shutdown_f_ops {
- struct file_operations f_ops;
- struct snd_shutdown_f_ops *next;
-};
+static DEFINE_SPINLOCK(shutdown_lock);
+static LIST_HEAD(shutdown_files);
+
+static const struct file_operations snd_shutdown_f_ops;
+
+static unsigned int snd_cards_lock; /* locked for registering/using */
+struct snd_card *snd_cards[SNDRV_CARDS];
+EXPORT_SYMBOL(snd_cards);
+
+static DEFINE_MUTEX(snd_card_mutex);
+
+static char *slots[SNDRV_CARDS];
+module_param_array(slots, charp, NULL, 0444);
+MODULE_PARM_DESC(slots, "Module names assigned to the slots.");
+
+/* return non-zero if the given index is reserved for the given
+ * module via slots option
+ */
+static int module_slot_match(struct module *module, int idx)
+{
+ int match = 1;
+#ifdef MODULE
+ const char *s1, *s2;
+
+ if (!module || !module->name || !slots[idx])
+ return 0;
-unsigned int snd_cards_lock = 0; /* locked for registering/using */
-snd_card_t *snd_cards[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = NULL};
-DEFINE_RWLOCK(snd_card_rwlock);
+ s1 = module->name;
+ s2 = slots[idx];
+ if (*s2 == '!') {
+ match = 0; /* negative match */
+ s2++;
+ }
+ /* compare module name strings
+ * hyphens are handled as equivalent with underscore
+ */
+ for (;;) {
+ char c1 = *s1++;
+ char c2 = *s2++;
+ if (c1 == '-')
+ c1 = '_';
+ if (c2 == '-')
+ c2 = '_';
+ if (c1 != c2)
+ return !match;
+ if (!c1)
+ break;
+ }
+#endif /* MODULE */
+ return match;
+}
#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
-int (*snd_mixer_oss_notify_callback)(snd_card_t *card, int free_flag);
+int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int free_flag);
+EXPORT_SYMBOL(snd_mixer_oss_notify_callback);
#endif
-static void snd_card_id_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
+#ifdef CONFIG_PROC_FS
+static void snd_card_id_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
{
snd_iprintf(buffer, "%s\n", entry->card->id);
}
-static void snd_card_free_thread(void * __card);
+static inline int init_info_for_card(struct snd_card *card)
+{
+ int err;
+ struct snd_info_entry *entry;
+
+ if ((err = snd_info_card_register(card)) < 0) {
+ snd_printd("unable to create card info\n");
+ return err;
+ }
+ if ((entry = snd_info_create_card_entry(card, "id", card->proc_root)) == NULL) {
+ snd_printd("unable to create card entry\n");
+ return err;
+ }
+ entry->c.text.read = snd_card_id_read;
+ if (snd_info_register(entry) < 0) {
+ snd_info_free_entry(entry);
+ entry = NULL;
+ }
+ card->proc_id = entry;
+ return 0;
+}
+#else /* !CONFIG_PROC_FS */
+#define init_info_for_card(card)
+#endif
/**
* snd_card_new - create and initialize a soundcard structure
*
* Creates and initializes a soundcard structure.
*
- * Returns kmallocated snd_card_t structure. Creates the ALSA control interface
+ * Returns kmallocated snd_card structure. Creates the ALSA control interface
* (which is blocked until snd_card_register function is called).
*/
-snd_card_t *snd_card_new(int idx, const char *xid,
+struct snd_card *snd_card_new(int idx, const char *xid,
struct module *module, int extra_size)
{
- snd_card_t *card;
- int err;
+ struct snd_card *card;
+ int err, idx2;
if (extra_size < 0)
extra_size = 0;
- card = kcalloc(1, sizeof(*card) + extra_size, GFP_KERNEL);
+ card = kzalloc(sizeof(*card) + extra_size, GFP_KERNEL);
if (card == NULL)
return NULL;
if (xid) {
strlcpy(card->id, xid, sizeof(card->id));
}
err = 0;
- write_lock(&snd_card_rwlock);
+ mutex_lock(&snd_card_mutex);
+ if (idx < 0) {
+ for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++)
+ /* idx == -1 == 0xffff means: take any free slot */
+ if (~snd_cards_lock & idx & 1<<idx2) {
+ if (module_slot_match(module, idx2)) {
+ idx = idx2;
+ break;
+ }
+ }
+ }
if (idx < 0) {
- int idx2;
for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++)
+ /* idx == -1 == 0xffff means: take any free slot */
if (~snd_cards_lock & idx & 1<<idx2) {
- idx = idx2;
- if (idx >= snd_ecards_limit)
- snd_ecards_limit = idx + 1;
- break;
+ if (!slots[idx2] || !*slots[idx2]) {
+ idx = idx2;
+ break;
+ }
}
- } else if (idx < snd_ecards_limit) {
+ }
+ if (idx < 0)
+ err = -ENODEV;
+ else if (idx < snd_ecards_limit) {
if (snd_cards_lock & (1 << idx))
- err = -ENODEV; /* invalid */
- } else if (idx < SNDRV_CARDS)
- snd_ecards_limit = idx + 1; /* increase the limit */
- else
+ err = -EBUSY; /* invalid */
+ } else if (idx >= SNDRV_CARDS)
err = -ENODEV;
- if (idx < 0 || err < 0) {
- write_unlock(&snd_card_rwlock);
- snd_printk(KERN_ERR "cannot find the slot for index %d (range 0-%i)\n", idx, snd_ecards_limit - 1);
+ if (err < 0) {
+ mutex_unlock(&snd_card_mutex);
+ snd_printk(KERN_ERR "cannot find the slot for index %d (range 0-%i), error: %d\n",
+ idx, snd_ecards_limit - 1, err);
goto __error;
}
snd_cards_lock |= 1 << idx; /* lock it */
- write_unlock(&snd_card_rwlock);
+ if (idx >= snd_ecards_limit)
+ snd_ecards_limit = idx + 1; /* increase the limit */
+ mutex_unlock(&snd_card_mutex);
card->number = idx;
card->module = module;
INIT_LIST_HEAD(&card->devices);
INIT_LIST_HEAD(&card->ctl_files);
spin_lock_init(&card->files_lock);
init_waitqueue_head(&card->shutdown_sleep);
- INIT_WORK(&card->free_workq, snd_card_free_thread, card);
#ifdef CONFIG_PM
- init_MUTEX(&card->power_lock);
+ mutex_init(&card->power_lock);
init_waitqueue_head(&card->power_sleep);
#endif
/* the control interface cannot be accessed from the user space until */
goto __error_ctl;
}
if (extra_size > 0)
- card->private_data = (char *)card + sizeof(snd_card_t);
+ card->private_data = (char *)card + sizeof(struct snd_card);
return card;
__error_ctl:
return NULL;
}
+EXPORT_SYMBOL(snd_card_new);
+
+/* return non-zero if a card is already locked */
+int snd_card_locked(int card)
+{
+ int locked;
+
+ mutex_lock(&snd_card_mutex);
+ locked = snd_cards_lock & (1 << card);
+ mutex_unlock(&snd_card_mutex);
+ return locked;
+}
+
+static loff_t snd_disconnect_llseek(struct file *file, loff_t offset, int orig)
+{
+ return -ENODEV;
+}
+
+static ssize_t snd_disconnect_read(struct file *file, char __user *buf,
+ size_t count, loff_t *offset)
+{
+ return -ENODEV;
+}
+
+static ssize_t snd_disconnect_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *offset)
+{
+ return -ENODEV;
+}
+
+static int snd_disconnect_release(struct inode *inode, struct file *file)
+{
+ struct snd_monitor_file *df = NULL, *_df;
+
+ spin_lock(&shutdown_lock);
+ list_for_each_entry(_df, &shutdown_files, shutdown_list) {
+ if (_df->file == file) {
+ df = _df;
+ break;
+ }
+ }
+ spin_unlock(&shutdown_lock);
+
+ if (likely(df)) {
+ if ((file->f_flags & FASYNC) && df->disconnected_f_op->fasync)
+ df->disconnected_f_op->fasync(-1, file, 0);
+ return df->disconnected_f_op->release(inode, file);
+ }
+
+ panic("%s(%p, %p) failed!", __func__, inode, file);
+}
+
static unsigned int snd_disconnect_poll(struct file * file, poll_table * wait)
{
return POLLERR | POLLNVAL;
}
+static long snd_disconnect_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ return -ENODEV;
+}
+
+static int snd_disconnect_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ return -ENODEV;
+}
+
+static int snd_disconnect_fasync(int fd, struct file *file, int on)
+{
+ return -ENODEV;
+}
+
+static const struct file_operations snd_shutdown_f_ops =
+{
+ .owner = THIS_MODULE,
+ .llseek = snd_disconnect_llseek,
+ .read = snd_disconnect_read,
+ .write = snd_disconnect_write,
+ .release = snd_disconnect_release,
+ .poll = snd_disconnect_poll,
+ .unlocked_ioctl = snd_disconnect_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = snd_disconnect_ioctl,
+#endif
+ .mmap = snd_disconnect_mmap,
+ .fasync = snd_disconnect_fasync
+};
+
/**
* snd_card_disconnect - disconnect all APIs from the file-operations (user space)
* @card: soundcard structure
* Note: The current implementation replaces all active file->f_op with special
* dummy file operations (they do nothing except release).
*/
-int snd_card_disconnect(snd_card_t * card)
+int snd_card_disconnect(struct snd_card *card)
{
struct snd_monitor_file *mfile;
struct file *file;
- struct snd_shutdown_f_ops *s_f_ops;
- struct file_operations *f_ops, *old_f_ops;
int err;
+ if (!card)
+ return -EINVAL;
+
spin_lock(&card->files_lock);
if (card->shutdown) {
spin_unlock(&card->files_lock);
spin_unlock(&card->files_lock);
/* phase 1: disable fops (user space) operations for ALSA API */
- write_lock(&snd_card_rwlock);
+ mutex_lock(&snd_card_mutex);
snd_cards[card->number] = NULL;
- write_unlock(&snd_card_rwlock);
+ snd_cards_lock &= ~(1 << card->number);
+ mutex_unlock(&snd_card_mutex);
/* phase 2: replace file->f_op with special dummy operations */
/* it's critical part, use endless loop */
/* we have no room to fail */
- s_f_ops = kmalloc(sizeof(struct snd_shutdown_f_ops), GFP_ATOMIC);
- if (s_f_ops == NULL)
- panic("Atomic allocation failed for snd_shutdown_f_ops!");
-
- f_ops = &s_f_ops->f_ops;
-
- memset(f_ops, 0, sizeof(*f_ops));
- f_ops->owner = file->f_op->owner;
- f_ops->release = file->f_op->release;
- f_ops->poll = snd_disconnect_poll;
+ mfile->disconnected_f_op = mfile->file->f_op;
- s_f_ops->next = card->s_f_ops;
- card->s_f_ops = s_f_ops;
-
- f_ops = fops_get(f_ops);
+ spin_lock(&shutdown_lock);
+ list_add(&mfile->shutdown_list, &shutdown_files);
+ spin_unlock(&shutdown_lock);
- old_f_ops = file->f_op;
- file->f_op = f_ops; /* must be atomic */
- fops_put(old_f_ops);
+ mfile->file->f_op = &snd_shutdown_f_ops;
+ fops_get(mfile->file->f_op);
mfile = mfile->next;
}
if (err < 0)
snd_printk(KERN_ERR "not all devices for card %i can be disconnected\n", card->number);
+ snd_info_card_disconnect(card);
+#ifndef CONFIG_SYSFS_DEPRECATED
+ if (card->card_dev) {
+ device_unregister(card->card_dev);
+ card->card_dev = NULL;
+ }
+#endif
+#ifdef CONFIG_PM
+ wake_up(&card->power_sleep);
+#endif
return 0;
}
-#ifdef CONFIG_SND_GENERIC_DRIVER
-static void snd_generic_device_unregister(snd_card_t *card);
-#else
-#define snd_generic_device_unregister(x) /*NOP*/
-#endif
+EXPORT_SYMBOL(snd_card_disconnect);
/**
* snd_card_free - frees given soundcard structure
* Returns zero. Frees all associated devices and frees the control
* interface associated to given soundcard.
*/
-int snd_card_free(snd_card_t * card)
+static int snd_card_do_free(struct snd_card *card)
{
- struct snd_shutdown_f_ops *s_f_ops;
-
- if (card == NULL)
- return -EINVAL;
- write_lock(&snd_card_rwlock);
- snd_cards[card->number] = NULL;
- write_unlock(&snd_card_rwlock);
-
-#ifdef CONFIG_PM
- wake_up(&card->power_sleep);
-#endif
- /* wait, until all devices are ready for the free operation */
- wait_event(card->shutdown_sleep, card->files == NULL);
-
#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
if (snd_mixer_oss_notify_callback)
snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_FREE);
}
if (card->private_free)
card->private_free(card);
- if (card->proc_id)
- snd_info_unregister(card->proc_id);
+ snd_info_free_entry(card->proc_id);
if (snd_info_card_free(card) < 0) {
snd_printk(KERN_WARNING "unable to free card info\n");
/* Not fatal error */
}
- snd_generic_device_unregister(card);
- while (card->s_f_ops) {
- s_f_ops = card->s_f_ops;
- card->s_f_ops = s_f_ops->next;
- kfree(s_f_ops);
- }
- write_lock(&snd_card_rwlock);
- snd_cards_lock &= ~(1 << card->number);
- write_unlock(&snd_card_rwlock);
kfree(card);
return 0;
}
-static void snd_card_free_thread(void * __card)
+int snd_card_free_when_closed(struct snd_card *card)
{
- snd_card_t *card = __card;
- struct module * module = card->module;
+ int free_now = 0;
+ int ret = snd_card_disconnect(card);
+ if (ret)
+ return ret;
- if (!try_module_get(module)) {
- snd_printk(KERN_ERR "unable to lock toplevel module for card %i in free thread\n", card->number);
- module = NULL;
- }
-
- snd_card_free(card);
+ spin_lock(&card->files_lock);
+ if (card->files == NULL)
+ free_now = 1;
+ else
+ card->free_on_last_close = 1;
+ spin_unlock(&card->files_lock);
- module_put(module);
+ if (free_now)
+ snd_card_do_free(card);
+ return 0;
}
-/**
- * snd_card_free_in_thread - call snd_card_free() in thread
- * @card: soundcard structure
- *
- * This function schedules the call of snd_card_free() function in a
- * work queue. When all devices are released (non-busy), the work
- * is woken up and calls snd_card_free().
- *
- * When a card can be disconnected at any time by hotplug service,
- * this function should be used in disconnect (or detach) callback
- * instead of calling snd_card_free() directly.
- *
- * Returns - zero otherwise a negative error code if the start of thread failed.
- */
-int snd_card_free_in_thread(snd_card_t * card)
-{
- if (card->files == NULL) {
- snd_card_free(card);
- return 0;
- }
+EXPORT_SYMBOL(snd_card_free_when_closed);
- if (schedule_work(&card->free_workq))
- return 0;
+int snd_card_free(struct snd_card *card)
+{
+ int ret = snd_card_disconnect(card);
+ if (ret)
+ return ret;
- snd_printk(KERN_ERR "schedule_work() failed in snd_card_free_in_thread for card %i\n", card->number);
- /* try to free the structure immediately */
- snd_card_free(card);
- return -EFAULT;
+ /* wait, until all devices are ready for the free operation */
+ wait_event(card->shutdown_sleep, card->files == NULL);
+ snd_card_do_free(card);
+ return 0;
}
-static void choose_default_id(snd_card_t * card)
+EXPORT_SYMBOL(snd_card_free);
+
+static void choose_default_id(struct snd_card *card)
{
- int i, len, idx_flag = 0, loops = 8;
+ int i, len, idx_flag = 0, loops = SNDRV_CARDS;
char *id, *spos;
id = spos = card->shortname;
__change:
len = strlen(id);
- if (idx_flag)
- id[len-1]++;
- else if ((size_t)len <= sizeof(card->id) - 3) {
+ if (idx_flag) {
+ if (id[len-1] != '9')
+ id[len-1]++;
+ else
+ id[len-1] = 'A';
+ } else if ((size_t)len <= sizeof(card->id) - 3) {
strcat(id, "_1");
idx_flag++;
} else {
}
}
+#ifndef CONFIG_SYSFS_DEPRECATED
+static ssize_t
+card_id_show_attr(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ return snprintf(buf, PAGE_SIZE, "%s\n", card ? card->id : "(null)");
+}
+
+static ssize_t
+card_id_store_attr(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ char buf1[sizeof(card->id)];
+ size_t copy = count > sizeof(card->id) - 1 ?
+ sizeof(card->id) - 1 : count;
+ size_t idx;
+ int c;
+
+ for (idx = 0; idx < copy; idx++) {
+ c = buf[idx];
+ if (!isalnum(c) && c != '_' && c != '-')
+ return -EINVAL;
+ }
+ memcpy(buf1, buf, copy);
+ buf1[copy] = '\0';
+ mutex_lock(&snd_card_mutex);
+ if (!snd_info_check_reserved_words(buf1)) {
+ __exist:
+ mutex_unlock(&snd_card_mutex);
+ return -EEXIST;
+ }
+ for (idx = 0; idx < snd_ecards_limit; idx++) {
+ if (snd_cards[idx] && !strcmp(snd_cards[idx]->id, buf1))
+ goto __exist;
+ }
+ strcpy(card->id, buf1);
+ snd_info_card_id_change(card);
+ mutex_unlock(&snd_card_mutex);
+
+ return count;
+}
+
+static struct device_attribute card_id_attrs =
+ __ATTR(id, S_IRUGO | S_IWUSR, card_id_show_attr, card_id_store_attr);
+
+static ssize_t
+card_number_show_attr(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ return snprintf(buf, PAGE_SIZE, "%i\n", card ? card->number : -1);
+}
+
+static struct device_attribute card_number_attrs =
+ __ATTR(number, S_IRUGO, card_number_show_attr, NULL);
+#endif /* CONFIG_SYSFS_DEPRECATED */
+
/**
* snd_card_register - register the soundcard
* @card: soundcard structure
*
* Returns zero otherwise a negative error code if the registrain failed.
*/
-int snd_card_register(snd_card_t * card)
+int snd_card_register(struct snd_card *card)
{
int err;
- snd_info_entry_t *entry;
- snd_runtime_check(card != NULL, return -EINVAL);
+ if (snd_BUG_ON(!card))
+ return -EINVAL;
+#ifndef CONFIG_SYSFS_DEPRECATED
+ if (!card->card_dev) {
+ card->card_dev = device_create(sound_class, card->dev,
+ MKDEV(0, 0), card,
+ "card%i", card->number);
+ if (IS_ERR(card->card_dev))
+ card->card_dev = NULL;
+ }
+#endif
if ((err = snd_device_register_all(card)) < 0)
return err;
- write_lock(&snd_card_rwlock);
+ mutex_lock(&snd_card_mutex);
if (snd_cards[card->number]) {
/* already registered */
- write_unlock(&snd_card_rwlock);
+ mutex_unlock(&snd_card_mutex);
return 0;
}
if (card->id[0] == '\0')
choose_default_id(card);
snd_cards[card->number] = card;
- write_unlock(&snd_card_rwlock);
- if ((err = snd_info_card_register(card)) < 0) {
- snd_printd("unable to create card info\n");
- goto __skip_info;
- }
- if ((entry = snd_info_create_card_entry(card, "id", card->proc_root)) == NULL) {
- snd_printd("unable to create card entry\n");
- goto __skip_info;
- }
- entry->c.text.read_size = PAGE_SIZE;
- entry->c.text.read = snd_card_id_read;
- if (snd_info_register(entry) < 0) {
- snd_info_free_entry(entry);
- entry = NULL;
- }
- card->proc_id = entry;
- __skip_info:
+ mutex_unlock(&snd_card_mutex);
+ init_info_for_card(card);
#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
if (snd_mixer_oss_notify_callback)
snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_REGISTER);
#endif
+#ifndef CONFIG_SYSFS_DEPRECATED
+ if (card->card_dev) {
+ err = device_create_file(card->card_dev, &card_id_attrs);
+ if (err < 0)
+ return err;
+ err = device_create_file(card->card_dev, &card_number_attrs);
+ if (err < 0)
+ return err;
+ }
+#endif
return 0;
}
-static snd_info_entry_t *snd_card_info_entry = NULL;
+EXPORT_SYMBOL(snd_card_register);
+
+#ifdef CONFIG_PROC_FS
+static struct snd_info_entry *snd_card_info_entry;
-static void snd_card_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
+static void snd_card_info_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
{
int idx, count;
- snd_card_t *card;
+ struct snd_card *card;
for (idx = count = 0; idx < SNDRV_CARDS; idx++) {
- read_lock(&snd_card_rwlock);
+ mutex_lock(&snd_card_mutex);
if ((card = snd_cards[idx]) != NULL) {
count++;
- snd_iprintf(buffer, "%i [%-15s]: %s - %s\n",
+ snd_iprintf(buffer, "%2i [%-15s]: %s - %s\n",
idx,
card->id,
card->driver,
card->shortname);
- snd_iprintf(buffer, " %s\n",
+ snd_iprintf(buffer, " %s\n",
card->longname);
}
- read_unlock(&snd_card_rwlock);
+ mutex_unlock(&snd_card_mutex);
}
if (!count)
snd_iprintf(buffer, "--- no soundcards ---\n");
}
-#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
+#ifdef CONFIG_SND_OSSEMUL
-void snd_card_info_read_oss(snd_info_buffer_t * buffer)
+void snd_card_info_read_oss(struct snd_info_buffer *buffer)
{
int idx, count;
- snd_card_t *card;
+ struct snd_card *card;
for (idx = count = 0; idx < SNDRV_CARDS; idx++) {
- read_lock(&snd_card_rwlock);
+ mutex_lock(&snd_card_mutex);
if ((card = snd_cards[idx]) != NULL) {
count++;
snd_iprintf(buffer, "%s\n", card->longname);
}
- read_unlock(&snd_card_rwlock);
+ mutex_unlock(&snd_card_mutex);
}
if (!count) {
snd_iprintf(buffer, "--- no soundcards ---\n");
#endif
#ifdef MODULE
-static snd_info_entry_t *snd_card_module_info_entry;
-static void snd_card_module_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
+static struct snd_info_entry *snd_card_module_info_entry;
+static void snd_card_module_info_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
{
int idx;
- snd_card_t *card;
+ struct snd_card *card;
for (idx = 0; idx < SNDRV_CARDS; idx++) {
- read_lock(&snd_card_rwlock);
+ mutex_lock(&snd_card_mutex);
if ((card = snd_cards[idx]) != NULL)
- snd_iprintf(buffer, "%i %s\n", idx, card->module->name);
- read_unlock(&snd_card_rwlock);
+ snd_iprintf(buffer, "%2i %s\n",
+ idx, card->module->name);
+ mutex_unlock(&snd_card_mutex);
}
}
#endif
int __init snd_card_info_init(void)
{
- snd_info_entry_t *entry;
+ struct snd_info_entry *entry;
entry = snd_info_create_module_entry(THIS_MODULE, "cards", NULL);
- snd_runtime_check(entry != NULL, return -ENOMEM);
- entry->c.text.read_size = PAGE_SIZE;
+ if (! entry)
+ return -ENOMEM;
entry->c.text.read = snd_card_info_read;
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
#ifdef MODULE
entry = snd_info_create_module_entry(THIS_MODULE, "modules", NULL);
if (entry) {
- entry->c.text.read_size = PAGE_SIZE;
entry->c.text.read = snd_card_module_info_read;
if (snd_info_register(entry) < 0)
snd_info_free_entry(entry);
int __exit snd_card_info_done(void)
{
- if (snd_card_info_entry)
- snd_info_unregister(snd_card_info_entry);
+ snd_info_free_entry(snd_card_info_entry);
#ifdef MODULE
- if (snd_card_module_info_entry)
- snd_info_unregister(snd_card_module_info_entry);
+ snd_info_free_entry(snd_card_module_info_entry);
#endif
return 0;
}
+#endif /* CONFIG_PROC_FS */
+
/**
* snd_component_add - add a component string
* @card: soundcard structure
* Returns zero otherwise a negative error code.
*/
-int snd_component_add(snd_card_t *card, const char *component)
+int snd_component_add(struct snd_card *card, const char *component)
{
char *ptr;
int len = strlen(component);
return 0;
}
+EXPORT_SYMBOL(snd_component_add);
+
/**
* snd_card_file_add - add the file to the file list of the card
* @card: soundcard structure
*
* Returns zero or a negative error code.
*/
-int snd_card_file_add(snd_card_t *card, struct file *file)
+int snd_card_file_add(struct snd_card *card, struct file *file)
{
struct snd_monitor_file *mfile;
if (mfile == NULL)
return -ENOMEM;
mfile->file = file;
+ mfile->disconnected_f_op = NULL;
mfile->next = NULL;
spin_lock(&card->files_lock);
if (card->shutdown) {
return 0;
}
+EXPORT_SYMBOL(snd_card_file_add);
+
/**
* snd_card_file_remove - remove the file from the file list
* @card: soundcard structure
*
* This function removes the file formerly added to the card via
* snd_card_file_add() function.
- * If all files are removed and the release of the card is
- * scheduled, it will wake up the the thread to call snd_card_free()
- * (see snd_card_free_in_thread() function).
+ * If all files are removed and snd_card_free_when_closed() was
+ * called beforehand, it processes the pending release of
+ * resources.
*
* Returns zero or a negative error code.
*/
-int snd_card_file_remove(snd_card_t *card, struct file *file)
+int snd_card_file_remove(struct snd_card *card, struct file *file)
{
struct snd_monitor_file *mfile, *pfile = NULL;
+ int last_close = 0;
spin_lock(&card->files_lock);
mfile = card->files;
pfile = mfile;
mfile = mfile->next;
}
- spin_unlock(&card->files_lock);
+ if (mfile && mfile->disconnected_f_op) {
+ fops_put(mfile->disconnected_f_op);
+ spin_lock(&shutdown_lock);
+ list_del(&mfile->shutdown_list);
+ spin_unlock(&shutdown_lock);
+ }
if (card->files == NULL)
+ last_close = 1;
+ spin_unlock(&card->files_lock);
+ if (last_close) {
wake_up(&card->shutdown_sleep);
+ if (card->free_on_last_close)
+ snd_card_do_free(card);
+ }
if (!mfile) {
snd_printk(KERN_ERR "ALSA card file remove problem (%p)\n", file);
return -ENOENT;
return 0;
}
-#ifdef CONFIG_SND_GENERIC_DRIVER
-/*
- * generic device without a proper bus using platform_device
- * (e.g. ISA)
- */
-struct snd_generic_device {
- struct platform_device pdev;
- snd_card_t *card;
-};
-
-#define get_snd_generic_card(dev) container_of(to_platform_device(dev), struct snd_generic_device, pdev)->card
-
-#define SND_GENERIC_NAME "snd_generic"
-
-#ifdef CONFIG_PM
-static int snd_generic_suspend(struct device *dev, pm_message_t state, u32 level);
-static int snd_generic_resume(struct device *dev, u32 level);
-#endif
-
-/* initialized in sound.c */
-struct device_driver snd_generic_driver = {
- .name = SND_GENERIC_NAME,
- .bus = &platform_bus_type,
-#ifdef CONFIG_PM
- .suspend = snd_generic_suspend,
- .resume = snd_generic_resume,
-#endif
-};
-
-void snd_generic_device_release(struct device *dev)
-{
-}
-
-static int snd_generic_device_register(snd_card_t *card)
-{
- struct snd_generic_device *dev;
- int err;
-
- if (card->generic_dev)
- return 0; /* already registered */
-
- dev = kcalloc(1, sizeof(*dev), GFP_KERNEL);
- if (! dev) {
- snd_printk(KERN_ERR "can't allocate generic_device\n");
- return -ENOMEM;
- }
-
- dev->pdev.name = SND_GENERIC_NAME;
- dev->pdev.id = card->number;
- dev->pdev.dev.release = snd_generic_device_release;
- dev->card = card;
- if ((err = platform_device_register(&dev->pdev)) < 0) {
- kfree(dev);
- return err;
- }
- card->generic_dev = dev;
- return 0;
-}
-
-static void snd_generic_device_unregister(snd_card_t *card)
-{
- struct snd_generic_device *dev = card->generic_dev;
- if (dev) {
- platform_device_unregister(&dev->pdev);
- kfree(dev);
- card->generic_dev = NULL;
- }
-}
-
-/**
- * snd_card_set_generic_dev - assign the generic device to the card
- * @card: soundcard structure
- *
- * Assigns a generic device to the card. This function is provided as the
- * last resort, for devices without any proper bus. Thus this won't override
- * the device already assigned to the card.
- *
- * Returns zero if successful, or a negative error code.
- */
-int snd_card_set_generic_dev(snd_card_t *card)
-{
- int err;
- if ((err = snd_generic_device_register(card)) < 0)
- return err;
- if (! card->dev)
- snd_card_set_dev(card, &card->generic_dev->pdev.dev);
- return 0;
-}
-#endif /* CONFIG_SND_GENERIC_DRIVER */
+EXPORT_SYMBOL(snd_card_file_remove);
#ifdef CONFIG_PM
/**
* snd_power_wait - wait until the power-state is changed.
* @card: soundcard structure
* @power_state: expected power state
- * @file: file structure for the O_NONBLOCK check (optional)
*
* Waits until the power-state is changed.
*
* Note: the power lock must be active before call.
*/
-int snd_power_wait(snd_card_t *card, unsigned int power_state, struct file *file)
+int snd_power_wait(struct snd_card *card, unsigned int power_state)
{
wait_queue_t wait;
int result = 0;
}
if (snd_power_get_state(card) == power_state)
break;
-#if 0 /* block all devices */
- if (file && (file->f_flags & O_NONBLOCK)) {
- result = -EAGAIN;
- break;
- }
-#endif
set_current_state(TASK_UNINTERRUPTIBLE);
snd_power_unlock(card);
schedule_timeout(30 * HZ);
return result;
}
-/**
- * snd_card_set_pm_callback - set the PCI power-management callbacks
- * @card: soundcard structure
- * @suspend: suspend callback function
- * @resume: resume callback function
- * @private_data: private data to pass to the callback functions
- *
- * Sets the power-management callback functions of the card.
- * These callbacks are called from ALSA's common PCI suspend/resume
- * handler and from the control API.
- */
-int snd_card_set_pm_callback(snd_card_t *card,
- int (*suspend)(snd_card_t *, pm_message_t),
- int (*resume)(snd_card_t *),
- void *private_data)
-{
- card->pm_suspend = suspend;
- card->pm_resume = resume;
- card->pm_private_data = private_data;
- return 0;
-}
-
-#ifdef CONFIG_SND_GENERIC_DRIVER
-/* suspend/resume callbacks for snd_generic platform device */
-static int snd_generic_suspend(struct device *dev, pm_message_t state, u32 level)
-{
- snd_card_t *card;
-
- if (level != SUSPEND_DISABLE)
- return 0;
-
- card = get_snd_generic_card(dev);
- if (card->power_state == SNDRV_CTL_POWER_D3hot)
- return 0;
- card->pm_suspend(card, PMSG_SUSPEND);
- snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
- return 0;
-}
-
-static int snd_generic_resume(struct device *dev, u32 level)
-{
- snd_card_t *card;
-
- if (level != RESUME_ENABLE)
- return 0;
-
- card = get_snd_generic_card(dev);
- if (card->power_state == SNDRV_CTL_POWER_D0)
- return 0;
- card->pm_resume(card);
- snd_power_change_state(card, SNDRV_CTL_POWER_D0);
- return 0;
-}
-
-/**
- * snd_card_set_generic_pm_callback - set the generic power-management callbacks
- * @card: soundcard structure
- * @suspend: suspend callback function
- * @resume: resume callback function
- * @private_data: private data to pass to the callback functions
- *
- * Registers the power-management and sets the lowlevel callbacks for
- * the given card. These callbacks are called from the ALSA's common
- * PM handler and from the control API.
- */
-int snd_card_set_generic_pm_callback(snd_card_t *card,
- int (*suspend)(snd_card_t *, pm_message_t),
- int (*resume)(snd_card_t *),
- void *private_data)
-{
- int err;
- if ((err = snd_generic_device_register(card)) < 0)
- return err;
- return snd_card_set_pm_callback(card, suspend, resume, private_data);
-}
-#endif /* CONFIG_SND_GENERIC_DRIVER */
-
-#ifdef CONFIG_PCI
-int snd_card_pci_suspend(struct pci_dev *dev, pm_message_t state)
-{
- snd_card_t *card = pci_get_drvdata(dev);
- int err;
- if (! card || ! card->pm_suspend)
- return 0;
- if (card->power_state == SNDRV_CTL_POWER_D3hot)
- return 0;
- err = card->pm_suspend(card, PMSG_SUSPEND);
- pci_save_state(dev);
- snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
- return err;
-}
-
-int snd_card_pci_resume(struct pci_dev *dev)
-{
- snd_card_t *card = pci_get_drvdata(dev);
- if (! card || ! card->pm_resume)
- return 0;
- if (card->power_state == SNDRV_CTL_POWER_D0)
- return 0;
- /* restore the PCI config space */
- pci_restore_state(dev);
- card->pm_resume(card);
- snd_power_change_state(card, SNDRV_CTL_POWER_D0);
- return 0;
-}
-#endif
-
+EXPORT_SYMBOL(snd_power_wait);
#endif /* CONFIG_PM */