#include <linux/init.h>
#include <linux/slab.h>
#include <linux/time.h>
+#include <linux/mutex.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/pcm.h>
MODULE_DESCRIPTION("Midlevel PCM code for ALSA.");
MODULE_LICENSE("GPL");
-struct snd_pcm *snd_pcm_devices[SNDRV_CARDS * SNDRV_PCM_DEVICES];
+static LIST_HEAD(snd_pcm_devices);
static LIST_HEAD(snd_pcm_notify_list);
-static DECLARE_MUTEX(register_mutex);
+static DEFINE_MUTEX(register_mutex);
static int snd_pcm_free(struct snd_pcm *pcm);
static int snd_pcm_dev_free(struct snd_device *device);
static int snd_pcm_dev_register(struct snd_device *device);
static int snd_pcm_dev_disconnect(struct snd_device *device);
-static int snd_pcm_dev_unregister(struct snd_device *device);
+
+static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
+{
+ struct snd_pcm *pcm;
+
+ list_for_each_entry(pcm, &snd_pcm_devices, list) {
+ if (pcm->card == card && pcm->device == device)
+ return pcm;
+ }
+ return NULL;
+}
static int snd_pcm_control_ioctl(struct snd_card *card,
struct snd_ctl_file *control,
unsigned int cmd, unsigned long arg)
{
- unsigned int tmp;
-
- tmp = card->number * SNDRV_PCM_DEVICES;
switch (cmd) {
case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE:
{
if (get_user(device, (int __user *)arg))
return -EFAULT;
+ mutex_lock(®ister_mutex);
device = device < 0 ? 0 : device + 1;
while (device < SNDRV_PCM_DEVICES) {
- if (snd_pcm_devices[tmp + device])
+ if (snd_pcm_search(card, device))
break;
device++;
}
if (device == SNDRV_PCM_DEVICES)
device = -1;
+ mutex_unlock(®ister_mutex);
if (put_user(device, (int __user *)arg))
return -EFAULT;
return 0;
struct snd_pcm *pcm;
struct snd_pcm_str *pstr;
struct snd_pcm_substream *substream;
+ int err;
+
info = (struct snd_pcm_info __user *)arg;
if (get_user(device, &info->device))
return -EFAULT;
- if (device >= SNDRV_PCM_DEVICES)
- return -ENXIO;
- pcm = snd_pcm_devices[tmp + device];
- if (pcm == NULL)
- return -ENXIO;
if (get_user(stream, &info->stream))
return -EFAULT;
if (stream < 0 || stream > 1)
return -EINVAL;
- pstr = &pcm->streams[stream];
- if (pstr->substream_count == 0)
- return -ENOENT;
if (get_user(subdevice, &info->subdevice))
return -EFAULT;
- if (subdevice >= pstr->substream_count)
- return -ENXIO;
- for (substream = pstr->substream; substream; substream = substream->next)
+ mutex_lock(®ister_mutex);
+ pcm = snd_pcm_search(card, device);
+ if (pcm == NULL) {
+ err = -ENXIO;
+ goto _error;
+ }
+ pstr = &pcm->streams[stream];
+ if (pstr->substream_count == 0) {
+ err = -ENOENT;
+ goto _error;
+ }
+ if (subdevice >= pstr->substream_count) {
+ err = -ENXIO;
+ goto _error;
+ }
+ for (substream = pstr->substream; substream;
+ substream = substream->next)
if (substream->number == (int)subdevice)
break;
- if (substream == NULL)
- return -ENXIO;
- return snd_pcm_info_user(substream, info);
+ if (substream == NULL) {
+ err = -ENXIO;
+ goto _error;
+ }
+ err = snd_pcm_info_user(substream, info);
+ _error:
+ mutex_unlock(®ister_mutex);
+ return err;
}
case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE:
{
}
return -ENOIOCTLCMD;
}
+
+#ifdef CONFIG_SND_VERBOSE_PROCFS
+
#define STATE(v) [SNDRV_PCM_STATE_##v] = #v
#define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v
#define READY(v) [SNDRV_PCM_READY_##v] = #v
#define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v
#define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v
-static char *snd_pcm_stream_names[] = {
- STREAM(PLAYBACK),
- STREAM(CAPTURE),
-};
-
-static char *snd_pcm_state_names[] = {
- STATE(OPEN),
- STATE(SETUP),
- STATE(PREPARED),
- STATE(RUNNING),
- STATE(XRUN),
- STATE(DRAINING),
- STATE(PAUSED),
- STATE(SUSPENDED),
-};
-
-static char *snd_pcm_access_names[] = {
- ACCESS(MMAP_INTERLEAVED),
- ACCESS(MMAP_NONINTERLEAVED),
- ACCESS(MMAP_COMPLEX),
- ACCESS(RW_INTERLEAVED),
- ACCESS(RW_NONINTERLEAVED),
-};
-
static char *snd_pcm_format_names[] = {
FORMAT(S8),
FORMAT(U8),
FORMAT(U18_3BE),
};
+static const char *snd_pcm_format_name(snd_pcm_format_t format)
+{
+ return snd_pcm_format_names[format];
+}
+
+static char *snd_pcm_stream_names[] = {
+ STREAM(PLAYBACK),
+ STREAM(CAPTURE),
+};
+
+static char *snd_pcm_state_names[] = {
+ STATE(OPEN),
+ STATE(SETUP),
+ STATE(PREPARED),
+ STATE(RUNNING),
+ STATE(XRUN),
+ STATE(DRAINING),
+ STATE(PAUSED),
+ STATE(SUSPENDED),
+};
+
+static char *snd_pcm_access_names[] = {
+ ACCESS(MMAP_INTERLEAVED),
+ ACCESS(MMAP_NONINTERLEAVED),
+ ACCESS(MMAP_COMPLEX),
+ ACCESS(RW_INTERLEAVED),
+ ACCESS(RW_NONINTERLEAVED),
+};
+
static char *snd_pcm_subformat_names[] = {
SUBFORMAT(STD),
};
return snd_pcm_access_names[access];
}
-const char *snd_pcm_format_name(snd_pcm_format_t format)
-{
- return snd_pcm_format_names[format];
-}
-
static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat)
{
return snd_pcm_subformat_names[subformat];
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
#include <linux/soundcard.h>
+
static const char *snd_pcm_oss_format_name(int format)
{
switch (format) {
}
#endif
-#ifdef CONFIG_PROC_FS
static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream,
struct snd_info_buffer *buffer)
{
snd_iprintf(buffer, "closed\n");
return;
}
- snd_pcm_stream_lock_irq(substream);
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
snd_iprintf(buffer, "no setup\n");
- snd_pcm_stream_unlock_irq(substream);
return;
}
snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access));
snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames);
}
#endif
- snd_pcm_stream_unlock_irq(substream);
}
static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry,
snd_iprintf(buffer, "closed\n");
return;
}
- snd_pcm_stream_lock_irq(substream);
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
snd_iprintf(buffer, "no setup\n");
- snd_pcm_stream_unlock_irq(substream);
return;
}
snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode));
snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold);
snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size);
snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary);
- snd_pcm_stream_unlock_irq(substream);
}
static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr);
snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr);
}
-#endif
-#ifdef CONFIG_SND_DEBUG
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
pstr->proc_root = entry;
if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) {
- snd_info_set_text_ops(entry, pstr, 256, snd_pcm_stream_proc_info_read);
+ snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read);
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
entry = NULL;
}
pstr->proc_info_entry = entry;
-#ifdef CONFIG_SND_DEBUG
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug",
pstr->proc_root)) != NULL) {
- entry->c.text.read_size = 64;
entry->c.text.read = snd_pcm_xrun_debug_read;
- entry->c.text.write_size = 64;
entry->c.text.write = snd_pcm_xrun_debug_write;
entry->mode |= S_IWUSR;
entry->private_data = pstr;
static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr)
{
-#ifdef CONFIG_SND_DEBUG
- if (pstr->proc_xrun_debug_entry) {
- snd_info_unregister(pstr->proc_xrun_debug_entry);
- pstr->proc_xrun_debug_entry = NULL;
- }
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
+ snd_info_free_entry(pstr->proc_xrun_debug_entry);
+ pstr->proc_xrun_debug_entry = NULL;
#endif
- if (pstr->proc_info_entry) {
- snd_info_unregister(pstr->proc_info_entry);
- pstr->proc_info_entry = NULL;
- }
- if (pstr->proc_root) {
- snd_info_unregister(pstr->proc_root);
- pstr->proc_root = NULL;
- }
+ snd_info_free_entry(pstr->proc_info_entry);
+ pstr->proc_info_entry = NULL;
+ snd_info_free_entry(pstr->proc_root);
+ pstr->proc_root = NULL;
return 0;
}
substream->proc_root = entry;
if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) {
- snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_info_read);
+ snd_info_set_text_ops(entry, substream,
+ snd_pcm_substream_proc_info_read);
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
entry = NULL;
substream->proc_info_entry = entry;
if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) {
- snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_hw_params_read);
+ snd_info_set_text_ops(entry, substream,
+ snd_pcm_substream_proc_hw_params_read);
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
entry = NULL;
substream->proc_hw_params_entry = entry;
if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) {
- snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_sw_params_read);
+ snd_info_set_text_ops(entry, substream,
+ snd_pcm_substream_proc_sw_params_read);
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
entry = NULL;
substream->proc_sw_params_entry = entry;
if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) {
- snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_status_read);
+ snd_info_set_text_ops(entry, substream,
+ snd_pcm_substream_proc_status_read);
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
entry = NULL;
return 0;
}
-
+
static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream)
{
- if (substream->proc_info_entry) {
- snd_info_unregister(substream->proc_info_entry);
- substream->proc_info_entry = NULL;
- }
- if (substream->proc_hw_params_entry) {
- snd_info_unregister(substream->proc_hw_params_entry);
- substream->proc_hw_params_entry = NULL;
- }
- if (substream->proc_sw_params_entry) {
- snd_info_unregister(substream->proc_sw_params_entry);
- substream->proc_sw_params_entry = NULL;
- }
- if (substream->proc_status_entry) {
- snd_info_unregister(substream->proc_status_entry);
- substream->proc_status_entry = NULL;
- }
- if (substream->proc_root) {
- snd_info_unregister(substream->proc_root);
- substream->proc_root = NULL;
- }
+ snd_info_free_entry(substream->proc_info_entry);
+ substream->proc_info_entry = NULL;
+ snd_info_free_entry(substream->proc_hw_params_entry);
+ substream->proc_hw_params_entry = NULL;
+ snd_info_free_entry(substream->proc_sw_params_entry);
+ substream->proc_sw_params_entry = NULL;
+ snd_info_free_entry(substream->proc_status_entry);
+ substream->proc_status_entry = NULL;
+ snd_info_free_entry(substream->proc_root);
+ substream->proc_root = NULL;
return 0;
}
+#else /* !CONFIG_SND_VERBOSE_PROCFS */
+static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; }
+static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; }
+static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; }
+static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; }
+#endif /* CONFIG_SND_VERBOSE_PROCFS */
/**
* snd_pcm_new_stream - create a new PCM stream
struct snd_pcm_substream *substream, *prev;
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
- init_MUTEX(&pstr->oss.setup_mutex);
+ mutex_init(&pstr->oss.setup_mutex);
#endif
pstr->stream = stream;
pstr->pcm = pcm;
pstr->substream_count = substream_count;
- pstr->reg = &snd_pcm_reg[stream];
if (substream_count > 0) {
err = snd_pcm_stream_proc_init(pstr);
if (err < 0) {
substream->number = idx;
substream->stream = stream;
sprintf(substream->name, "subdevice #%i", idx);
+ snprintf(substream->latency_id, sizeof(substream->latency_id),
+ "ALSA-PCM%d-%d%c%d", pcm->card->number, pcm->device,
+ (stream ? 'c' : 'p'), idx);
substream->buffer_bytes_max = UINT_MAX;
if (prev == NULL)
pstr->substream = substream;
err = snd_pcm_substream_proc_init(substream);
if (err < 0) {
snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n");
+ if (prev == NULL)
+ pstr->substream = NULL;
+ else
+ prev->next = NULL;
kfree(substream);
return err;
}
INIT_LIST_HEAD(&substream->self_group.substreams);
list_add_tail(&substream->link_list, &substream->self_group.substreams);
spin_lock_init(&substream->timer_lock);
+ atomic_set(&substream->mmap_count, 0);
prev = substream;
}
return 0;
}
+EXPORT_SYMBOL(snd_pcm_new_stream);
+
/**
* snd_pcm_new - create a new PCM instance
* @card: the card instance
.dev_free = snd_pcm_dev_free,
.dev_register = snd_pcm_dev_register,
.dev_disconnect = snd_pcm_dev_disconnect,
- .dev_unregister = snd_pcm_dev_unregister
};
snd_assert(rpcm != NULL, return -EINVAL);
snd_pcm_free(pcm);
return err;
}
- init_MUTEX(&pcm->open_mutex);
+ mutex_init(&pcm->open_mutex);
init_waitqueue_head(&pcm->open_wait);
if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) {
snd_pcm_free(pcm);
return 0;
}
+EXPORT_SYMBOL(snd_pcm_new);
+
static void snd_pcm_free_stream(struct snd_pcm_str * pstr)
{
struct snd_pcm_substream *substream, *substream_next;
substream = pstr->substream;
while (substream) {
substream_next = substream->next;
+ snd_pcm_timer_done(substream);
snd_pcm_substream_proc_done(substream);
kfree(substream);
substream = substream_next;
static int snd_pcm_free(struct snd_pcm *pcm)
{
+ struct snd_pcm_notify *notify;
+
snd_assert(pcm != NULL, return -ENXIO);
+ list_for_each_entry(notify, &snd_pcm_notify_list, list) {
+ notify->n_unregister(pcm);
+ }
if (pcm->private_free)
pcm->private_free(pcm);
snd_pcm_lib_preallocate_free_for_all(pcm);
snd_pcm_tick_elapsed(substream);
}
-int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
- struct snd_pcm_substream **rsubstream)
+int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
+ struct file *file,
+ struct snd_pcm_substream **rsubstream)
{
struct snd_pcm_str * pstr;
struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
struct snd_ctl_file *kctl;
struct snd_card *card;
- struct list_head *list;
int prefer_subdevice = -1;
size_t size;
*rsubstream = NULL;
snd_assert(pcm != NULL, return -ENXIO);
pstr = &pcm->streams[stream];
- if (pstr->substream == NULL)
+ if (pstr->substream == NULL || pstr->substream_count == 0)
return -ENODEV;
card = pcm->card;
down_read(&card->controls_rwsem);
- list_for_each(list, &card->ctl_files) {
- kctl = snd_ctl_file(list);
+ list_for_each_entry(kctl, &card->ctl_files, list) {
if (kctl->pid == current->pid) {
prefer_subdevice = kctl->prefer_pcm_subdevice;
- break;
+ if (prefer_subdevice != -1)
+ break;
}
}
up_read(&card->controls_rwsem);
- if (pstr->substream_count == 0)
- return -ENODEV;
switch (stream) {
case SNDRV_PCM_STREAM_PLAYBACK:
if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) {
return -EINVAL;
}
+ if (file->f_flags & O_APPEND) {
+ if (prefer_subdevice < 0) {
+ if (pstr->substream_count > 1)
+ return -EINVAL; /* must be unique */
+ substream = pstr->substream;
+ } else {
+ for (substream = pstr->substream; substream;
+ substream = substream->next)
+ if (substream->number == prefer_subdevice)
+ break;
+ }
+ if (! substream)
+ return -ENODEV;
+ if (! SUBSTREAM_BUSY(substream))
+ return -EBADFD;
+ substream->ref_count++;
+ *rsubstream = substream;
+ return 0;
+ }
+
if (prefer_subdevice >= 0) {
for (substream = pstr->substream; substream; substream = substream->next)
if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice)
memset((void*)runtime->control, 0, size);
init_waitqueue_head(&runtime->sleep);
- atomic_set(&runtime->mmap_count, 0);
init_timer(&runtime->tick_timer);
runtime->tick_timer.function = snd_pcm_tick_timer_func;
runtime->tick_timer.data = (unsigned long) substream;
substream->runtime = runtime;
substream->private_data = pcm->private_data;
+ substream->ref_count = 1;
+ substream->f_flags = file->f_flags;
pstr->substream_opened++;
*rsubstream = substream;
return 0;
}
-void snd_pcm_release_substream(struct snd_pcm_substream *substream)
+void snd_pcm_detach_substream(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime;
- substream->file = NULL;
+
runtime = substream->runtime;
snd_assert(runtime != NULL, return);
if (runtime->private_free != NULL)
substream->pstr->substream_opened--;
}
+static ssize_t show_pcm_class(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct snd_pcm *pcm;
+ const char *str;
+ static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = {
+ [SNDRV_PCM_CLASS_GENERIC] = "generic",
+ [SNDRV_PCM_CLASS_MULTI] = "multi",
+ [SNDRV_PCM_CLASS_MODEM] = "modem",
+ [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer",
+ };
+
+ if (! (pcm = dev_get_drvdata(dev)) ||
+ pcm->dev_class > SNDRV_PCM_CLASS_LAST)
+ str = "none";
+ else
+ str = strs[pcm->dev_class];
+ return snprintf(buf, PAGE_SIZE, "%s\n", str);
+}
+
+static struct device_attribute pcm_attrs =
+ __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL);
+
static int snd_pcm_dev_register(struct snd_device *device)
{
- int idx, cidx, err;
- unsigned short minor;
+ int cidx, err;
struct snd_pcm_substream *substream;
- struct list_head *list;
+ struct snd_pcm_notify *notify;
char str[16];
struct snd_pcm *pcm = device->device_data;
+ struct device *dev;
snd_assert(pcm != NULL && device != NULL, return -ENXIO);
- down(®ister_mutex);
- idx = (pcm->card->number * SNDRV_PCM_DEVICES) + pcm->device;
- if (snd_pcm_devices[idx]) {
- up(®ister_mutex);
+ mutex_lock(®ister_mutex);
+ if (snd_pcm_search(pcm->card, pcm->device)) {
+ mutex_unlock(®ister_mutex);
return -EBUSY;
}
- snd_pcm_devices[idx] = pcm;
+ list_add_tail(&pcm->list, &snd_pcm_devices);
for (cidx = 0; cidx < 2; cidx++) {
int devtype = -1;
if (pcm->streams[cidx].substream == NULL)
switch (cidx) {
case SNDRV_PCM_STREAM_PLAYBACK:
sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device);
- minor = SNDRV_MINOR_PCM_PLAYBACK + idx;
devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK;
break;
case SNDRV_PCM_STREAM_CAPTURE:
sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device);
- minor = SNDRV_MINOR_PCM_CAPTURE + idx;
devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;
break;
}
- if ((err = snd_register_device(devtype, pcm->card, pcm->device, pcm->streams[cidx].reg, str)) < 0) {
- snd_pcm_devices[idx] = NULL;
- up(®ister_mutex);
+ /* device pointer to use, pcm->dev takes precedence if
+ * it is assigned, otherwise fall back to card's device
+ * if possible */
+ dev = pcm->dev;
+ if (!dev)
+ dev = snd_card_get_device_link(pcm->card);
+ /* register pcm */
+ err = snd_register_device_for_dev(devtype, pcm->card,
+ pcm->device,
+ &snd_pcm_f_ops[cidx],
+ pcm, str, dev);
+ if (err < 0) {
+ list_del(&pcm->list);
+ mutex_unlock(®ister_mutex);
return err;
}
+ snd_add_device_sysfs_file(devtype, pcm->card, pcm->device,
+ &pcm_attrs);
for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
snd_pcm_timer_init(substream);
}
- list_for_each(list, &snd_pcm_notify_list) {
- struct snd_pcm_notify *notify;
- notify = list_entry(list, struct snd_pcm_notify, list);
+
+ list_for_each_entry(notify, &snd_pcm_notify_list, list)
notify->n_register(pcm);
- }
- up(®ister_mutex);
+
+ mutex_unlock(®ister_mutex);
return 0;
}
static int snd_pcm_dev_disconnect(struct snd_device *device)
{
struct snd_pcm *pcm = device->device_data;
- struct list_head *list;
+ struct snd_pcm_notify *notify;
struct snd_pcm_substream *substream;
- int idx, cidx;
+ int cidx, devtype;
- down(®ister_mutex);
- idx = (pcm->card->number * SNDRV_PCM_DEVICES) + pcm->device;
- snd_pcm_devices[idx] = NULL;
+ mutex_lock(®ister_mutex);
+ if (list_empty(&pcm->list))
+ goto unlock;
+
+ list_del_init(&pcm->list);
for (cidx = 0; cidx < 2; cidx++)
for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
if (substream->runtime)
substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED;
- list_for_each(list, &snd_pcm_notify_list) {
- struct snd_pcm_notify *notify;
- notify = list_entry(list, struct snd_pcm_notify, list);
+ list_for_each_entry(notify, &snd_pcm_notify_list, list) {
notify->n_disconnect(pcm);
}
- up(®ister_mutex);
- return 0;
-}
-
-static int snd_pcm_dev_unregister(struct snd_device *device)
-{
- int idx, cidx, devtype;
- struct snd_pcm_substream *substream;
- struct list_head *list;
- struct snd_pcm *pcm = device->device_data;
-
- snd_assert(pcm != NULL, return -ENXIO);
- down(®ister_mutex);
- idx = (pcm->card->number * SNDRV_PCM_DEVICES) + pcm->device;
- snd_pcm_devices[idx] = NULL;
for (cidx = 0; cidx < 2; cidx++) {
devtype = -1;
switch (cidx) {
break;
}
snd_unregister_device(devtype, pcm->card, pcm->device);
- for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
- snd_pcm_timer_done(substream);
}
- list_for_each(list, &snd_pcm_notify_list) {
- struct snd_pcm_notify *notify;
- notify = list_entry(list, struct snd_pcm_notify, list);
- notify->n_unregister(pcm);
- }
- up(®ister_mutex);
- return snd_pcm_free(pcm);
+ unlock:
+ mutex_unlock(®ister_mutex);
+ return 0;
}
int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree)
{
- int idx;
+ struct snd_pcm *pcm;
- snd_assert(notify != NULL && notify->n_register != NULL && notify->n_unregister != NULL, return -EINVAL);
- down(®ister_mutex);
+ snd_assert(notify != NULL &&
+ notify->n_register != NULL &&
+ notify->n_unregister != NULL &&
+ notify->n_disconnect, return -EINVAL);
+ mutex_lock(®ister_mutex);
if (nfree) {
list_del(¬ify->list);
- for (idx = 0; idx < SNDRV_CARDS * SNDRV_PCM_DEVICES; idx++) {
- if (snd_pcm_devices[idx] == NULL)
- continue;
- notify->n_unregister(snd_pcm_devices[idx]);
- }
+ list_for_each_entry(pcm, &snd_pcm_devices, list)
+ notify->n_unregister(pcm);
} else {
list_add_tail(¬ify->list, &snd_pcm_notify_list);
- for (idx = 0; idx < SNDRV_CARDS * SNDRV_PCM_DEVICES; idx++) {
- if (snd_pcm_devices[idx] == NULL)
- continue;
- notify->n_register(snd_pcm_devices[idx]);
- }
+ list_for_each_entry(pcm, &snd_pcm_devices, list)
+ notify->n_register(pcm);
}
- up(®ister_mutex);
+ mutex_unlock(®ister_mutex);
return 0;
}
+EXPORT_SYMBOL(snd_pcm_notify);
+
+#ifdef CONFIG_PROC_FS
/*
* Info interface
*/
static void snd_pcm_proc_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
- int idx;
struct snd_pcm *pcm;
- down(®ister_mutex);
- for (idx = 0; idx < SNDRV_CARDS * SNDRV_PCM_DEVICES; idx++) {
- pcm = snd_pcm_devices[idx];
- if (pcm == NULL)
- continue;
- snd_iprintf(buffer, "%02i-%02i: %s : %s", idx / SNDRV_PCM_DEVICES,
- idx % SNDRV_PCM_DEVICES, pcm->id, pcm->name);
+ mutex_lock(®ister_mutex);
+ list_for_each_entry(pcm, &snd_pcm_devices, list) {
+ snd_iprintf(buffer, "%02i-%02i: %s : %s",
+ pcm->card->number, pcm->device, pcm->id, pcm->name);
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream)
snd_iprintf(buffer, " : playback %i",
pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count);
pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count);
snd_iprintf(buffer, "\n");
}
- up(®ister_mutex);
+ mutex_unlock(®ister_mutex);
}
-/*
- * ENTRY functions
- */
-
-static struct snd_info_entry *snd_pcm_proc_entry = NULL;
+static struct snd_info_entry *snd_pcm_proc_entry;
-static int __init alsa_pcm_init(void)
+static void snd_pcm_proc_init(void)
{
struct snd_info_entry *entry;
- snd_ctl_register_ioctl(snd_pcm_control_ioctl);
- snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl);
if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) {
- snd_info_set_text_ops(entry, NULL, SNDRV_CARDS * SNDRV_PCM_DEVICES * 128,
- snd_pcm_proc_read);
+ snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read);
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
entry = NULL;
}
}
snd_pcm_proc_entry = entry;
+}
+
+static void snd_pcm_proc_done(void)
+{
+ snd_info_free_entry(snd_pcm_proc_entry);
+}
+
+#else /* !CONFIG_PROC_FS */
+#define snd_pcm_proc_init()
+#define snd_pcm_proc_done()
+#endif /* CONFIG_PROC_FS */
+
+
+/*
+ * ENTRY functions
+ */
+
+static int __init alsa_pcm_init(void)
+{
+ snd_ctl_register_ioctl(snd_pcm_control_ioctl);
+ snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl);
+ snd_pcm_proc_init();
return 0;
}
{
snd_ctl_unregister_ioctl(snd_pcm_control_ioctl);
snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl);
- if (snd_pcm_proc_entry) {
- snd_info_unregister(snd_pcm_proc_entry);
- snd_pcm_proc_entry = NULL;
- }
+ snd_pcm_proc_done();
}
module_init(alsa_pcm_init)
module_exit(alsa_pcm_exit)
-
-EXPORT_SYMBOL(snd_pcm_devices);
-EXPORT_SYMBOL(snd_pcm_new);
-EXPORT_SYMBOL(snd_pcm_new_stream);
-EXPORT_SYMBOL(snd_pcm_notify);
-EXPORT_SYMBOL(snd_pcm_open_substream);
-EXPORT_SYMBOL(snd_pcm_release_substream);
-EXPORT_SYMBOL(snd_pcm_format_name);
- /* pcm_native.c */
-EXPORT_SYMBOL(snd_pcm_link_rwlock);
-#ifdef CONFIG_PM
-EXPORT_SYMBOL(snd_pcm_suspend);
-EXPORT_SYMBOL(snd_pcm_suspend_all);
-#endif
-EXPORT_SYMBOL(snd_pcm_kernel_playback_ioctl);
-EXPORT_SYMBOL(snd_pcm_kernel_capture_ioctl);
-EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
-EXPORT_SYMBOL(snd_pcm_mmap_data);
-#if SNDRV_PCM_INFO_MMAP_IOMEM
-EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
-#endif
- /* pcm_misc.c */
-EXPORT_SYMBOL(snd_pcm_format_signed);
-EXPORT_SYMBOL(snd_pcm_format_unsigned);
-EXPORT_SYMBOL(snd_pcm_format_linear);
-EXPORT_SYMBOL(snd_pcm_format_little_endian);
-EXPORT_SYMBOL(snd_pcm_format_big_endian);
-EXPORT_SYMBOL(snd_pcm_format_width);
-EXPORT_SYMBOL(snd_pcm_format_physical_width);
-EXPORT_SYMBOL(snd_pcm_format_size);
-EXPORT_SYMBOL(snd_pcm_format_silence_64);
-EXPORT_SYMBOL(snd_pcm_format_set_silence);
-EXPORT_SYMBOL(snd_pcm_build_linear_format);
-EXPORT_SYMBOL(snd_pcm_limit_hw_rates);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff