#include <linux/init.h>
#include <linux/slab.h>
+#include <linux/module.h>
#include <linux/time.h>
#include <linux/mutex.h>
+#include <linux/device.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/pcm.h>
static int snd_pcm_dev_register(struct snd_device *device);
static int snd_pcm_dev_disconnect(struct snd_device *device);
-static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
+static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
{
struct snd_pcm *pcm;
return NULL;
}
+static int snd_pcm_next(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->device;
+ else if (pcm->card->number > card->number)
+ return -1;
+ }
+ return -1;
+}
+
+static int snd_pcm_add(struct snd_pcm *newpcm)
+{
+ struct snd_pcm *pcm;
+
+ list_for_each_entry(pcm, &snd_pcm_devices, list) {
+ if (pcm->card == newpcm->card && pcm->device == newpcm->device)
+ return -EBUSY;
+ if (pcm->card->number > newpcm->card->number ||
+ (pcm->card == newpcm->card &&
+ pcm->device > newpcm->device)) {
+ list_add(&newpcm->list, pcm->list.prev);
+ return 0;
+ }
+ }
+ list_add_tail(&newpcm->list, &snd_pcm_devices);
+ return 0;
+}
+
static int snd_pcm_control_ioctl(struct snd_card *card,
struct snd_ctl_file *control,
unsigned int cmd, unsigned long arg)
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_search(card, device))
- break;
- device++;
- }
- if (device == SNDRV_PCM_DEVICES)
- device = -1;
+ device = snd_pcm_next(card, device);
mutex_unlock(®ister_mutex);
if (put_user(device, (int __user *)arg))
return -EFAULT;
if (get_user(subdevice, &info->subdevice))
return -EFAULT;
mutex_lock(®ister_mutex);
- pcm = snd_pcm_search(card, device);
+ pcm = snd_pcm_get(card, device);
if (pcm == NULL) {
err = -ENXIO;
goto _error;
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 XRUN(v) [SNDRV_PCM_XRUN_##v] = #v
-#define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v
-#define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v
-#define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v
-#define START(v) [SNDRV_PCM_START_##v] = #v
#define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v
-#define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v
static char *snd_pcm_format_names[] = {
FORMAT(S8),
FORMAT(S18_3BE),
FORMAT(U18_3LE),
FORMAT(U18_3BE),
+ FORMAT(G723_24),
+ FORMAT(G723_24_1B),
+ FORMAT(G723_40),
+ FORMAT(G723_40_1B),
};
-static const char *snd_pcm_format_name(snd_pcm_format_t format)
+const char *snd_pcm_format_name(snd_pcm_format_t format)
{
- return snd_pcm_format_names[format];
+ if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names))
+ return "Unknown";
+ return snd_pcm_format_names[(__force unsigned int)format];
}
+EXPORT_SYMBOL_GPL(snd_pcm_format_name);
+
+#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 XRUN(v) [SNDRV_PCM_XRUN_##v] = #v
+#define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v
+#define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v
+#define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v
+#define START(v) [SNDRV_PCM_START_##v] = #v
+#define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v
static char *snd_pcm_stream_names[] = {
STREAM(PLAYBACK),
static const char *snd_pcm_stream_name(int stream)
{
- snd_assert(stream <= SNDRV_PCM_STREAM_LAST, return NULL);
return snd_pcm_stream_names[stream];
}
static const char *snd_pcm_access_name(snd_pcm_access_t access)
{
- return snd_pcm_access_names[access];
+ return snd_pcm_access_names[(__force int)access];
}
static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat)
{
- return snd_pcm_subformat_names[subformat];
+ return snd_pcm_subformat_names[(__force int)subformat];
}
static const char *snd_pcm_tstamp_mode_name(int mode)
{
- snd_assert(mode <= SNDRV_PCM_TSTAMP_LAST, return NULL);
return snd_pcm_tstamp_mode_names[mode];
}
static const char *snd_pcm_state_name(snd_pcm_state_t state)
{
- return snd_pcm_state_names[state];
+ return snd_pcm_state_names[(__force int)state];
}
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
- snd_pcm_proc_info_read((struct snd_pcm_substream *)entry->private_data,
- buffer);
+ snd_pcm_proc_info_read(entry->private_data, buffer);
}
static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_pcm_substream *substream = entry->private_data;
- struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_pcm_runtime *runtime;
+
+ mutex_lock(&substream->pcm->open_mutex);
+ runtime = substream->runtime;
if (!runtime) {
snd_iprintf(buffer, "closed\n");
- return;
+ goto unlock;
}
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
snd_iprintf(buffer, "no setup\n");
- return;
+ goto unlock;
}
snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access));
snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format));
snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames);
}
#endif
+ unlock:
+ mutex_unlock(&substream->pcm->open_mutex);
}
static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_pcm_substream *substream = entry->private_data;
- struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_pcm_runtime *runtime;
+
+ mutex_lock(&substream->pcm->open_mutex);
+ runtime = substream->runtime;
if (!runtime) {
snd_iprintf(buffer, "closed\n");
- return;
+ goto unlock;
}
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
snd_iprintf(buffer, "no setup\n");
- return;
+ goto unlock;
}
snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode));
snd_iprintf(buffer, "period_step: %u\n", runtime->period_step);
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);
+ unlock:
+ mutex_unlock(&substream->pcm->open_mutex);
}
static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_pcm_substream *substream = entry->private_data;
- struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_pcm_runtime *runtime;
struct snd_pcm_status status;
int err;
+
+ mutex_lock(&substream->pcm->open_mutex);
+ runtime = substream->runtime;
if (!runtime) {
snd_iprintf(buffer, "closed\n");
- return;
+ goto unlock;
}
memset(&status, 0, sizeof(status));
err = snd_pcm_status(substream, &status);
if (err < 0) {
snd_iprintf(buffer, "error %d\n", err);
- return;
+ goto unlock;
}
snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state));
+ snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid));
snd_iprintf(buffer, "trigger_time: %ld.%09ld\n",
status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec);
snd_iprintf(buffer, "tstamp : %ld.%09ld\n",
snd_iprintf(buffer, "-----\n");
snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr);
snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr);
+ unlock:
+ mutex_unlock(&substream->pcm->open_mutex);
}
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
pstr->stream = stream;
pstr->pcm = pcm;
pstr->substream_count = substream_count;
- if (substream_count > 0) {
+ if (substream_count > 0 && !pcm->internal) {
err = snd_pcm_stream_proc_init(pstr);
if (err < 0) {
snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n");
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;
else
prev->next = 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;
+
+ if (!pcm->internal) {
+ 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;
+ }
}
substream->group = &substream->self_group;
spin_lock_init(&substream->self_group.lock);
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;
}
EXPORT_SYMBOL(snd_pcm_new_stream);
-/**
- * snd_pcm_new - create a new PCM instance
- * @card: the card instance
- * @id: the id string
- * @device: the device index (zero based)
- * @playback_count: the number of substreams for playback
- * @capture_count: the number of substreams for capture
- * @rpcm: the pointer to store the new pcm instance
- *
- * Creates a new PCM instance.
- *
- * The pcm operators have to be set afterwards to the new instance
- * via snd_pcm_set_ops().
- *
- * Returns zero if successful, or a negative error code on failure.
- */
-int snd_pcm_new(struct snd_card *card, char *id, int device,
- int playback_count, int capture_count,
- struct snd_pcm ** rpcm)
+static int _snd_pcm_new(struct snd_card *card, const char *id, int device,
+ int playback_count, int capture_count, bool internal,
+ struct snd_pcm **rpcm)
{
struct snd_pcm *pcm;
int err;
.dev_disconnect = snd_pcm_dev_disconnect,
};
- snd_assert(rpcm != NULL, return -EINVAL);
- *rpcm = NULL;
- snd_assert(card != NULL, return -ENXIO);
+ if (snd_BUG_ON(!card))
+ return -ENXIO;
+ if (rpcm)
+ *rpcm = NULL;
pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
if (pcm == NULL) {
snd_printk(KERN_ERR "Cannot allocate PCM\n");
}
pcm->card = card;
pcm->device = device;
+ pcm->internal = internal;
if (id)
strlcpy(pcm->id, id, sizeof(pcm->id));
if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) {
snd_pcm_free(pcm);
return err;
}
- *rpcm = pcm;
+ if (rpcm)
+ *rpcm = pcm;
return 0;
}
+/**
+ * snd_pcm_new - create a new PCM instance
+ * @card: the card instance
+ * @id: the id string
+ * @device: the device index (zero based)
+ * @playback_count: the number of substreams for playback
+ * @capture_count: the number of substreams for capture
+ * @rpcm: the pointer to store the new pcm instance
+ *
+ * Creates a new PCM instance.
+ *
+ * The pcm operators have to be set afterwards to the new instance
+ * via snd_pcm_set_ops().
+ *
+ * Returns zero if successful, or a negative error code on failure.
+ */
+int snd_pcm_new(struct snd_card *card, const char *id, int device,
+ int playback_count, int capture_count, struct snd_pcm **rpcm)
+{
+ return _snd_pcm_new(card, id, device, playback_count, capture_count,
+ false, rpcm);
+}
EXPORT_SYMBOL(snd_pcm_new);
+/**
+ * snd_pcm_new_internal - create a new internal PCM instance
+ * @card: the card instance
+ * @id: the id string
+ * @device: the device index (zero based - shared with normal PCMs)
+ * @playback_count: the number of substreams for playback
+ * @capture_count: the number of substreams for capture
+ * @rpcm: the pointer to store the new pcm instance
+ *
+ * Creates a new internal PCM instance with no userspace device or procfs
+ * entries. This is used by ASoC Back End PCMs in order to create a PCM that
+ * will only be used internally by kernel drivers. i.e. it cannot be opened
+ * by userspace. It provides existing ASoC components drivers with a substream
+ * and access to any private data.
+ *
+ * The pcm operators have to be set afterwards to the new instance
+ * via snd_pcm_set_ops().
+ *
+ * Returns zero if successful, or a negative error code on failure.
+ */
+int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
+ int playback_count, int capture_count,
+ struct snd_pcm **rpcm)
+{
+ return _snd_pcm_new(card, id, device, playback_count, capture_count,
+ true, rpcm);
+}
+EXPORT_SYMBOL(snd_pcm_new_internal);
+
static void snd_pcm_free_stream(struct snd_pcm_str * pstr)
{
struct snd_pcm_substream *substream, *substream_next;
{
struct snd_pcm_notify *notify;
- snd_assert(pcm != NULL, return -ENXIO);
+ if (!pcm)
+ return 0;
list_for_each_entry(notify, &snd_pcm_notify_list, list) {
notify->n_unregister(pcm);
}
int prefer_subdevice = -1;
size_t size;
- snd_assert(rsubstream != NULL, return -EINVAL);
+ if (snd_BUG_ON(!pcm || !rsubstream))
+ return -ENXIO;
*rsubstream = NULL;
- snd_assert(pcm != NULL, return -ENXIO);
pstr = &pcm->streams[stream];
if (pstr->substream == NULL || pstr->substream_count == 0)
return -ENODEV;
card = pcm->card;
read_lock(&card->ctl_files_rwlock);
list_for_each_entry(kctl, &card->ctl_files, list) {
- if (kctl->pid == current->pid) {
+ if (kctl->pid == task_pid(current)) {
prefer_subdevice = kctl->prefer_pcm_subdevice;
if (prefer_subdevice != -1)
break;
memset((void*)runtime->control, 0, size);
init_waitqueue_head(&runtime->sleep);
+ init_waitqueue_head(&runtime->tsleep);
runtime->status->state = SNDRV_PCM_STATE_OPEN;
substream->private_data = pcm->private_data;
substream->ref_count = 1;
substream->f_flags = file->f_flags;
+ substream->pid = get_pid(task_pid(current));
pstr->substream_opened++;
*rsubstream = substream;
return 0;
{
struct snd_pcm_runtime *runtime;
+ if (PCM_RUNTIME_CHECK(substream))
+ return;
runtime = substream->runtime;
- snd_assert(runtime != NULL, return);
if (runtime->private_free != NULL)
runtime->private_free(runtime);
snd_free_pages((void*)runtime->status,
snd_free_pages((void*)runtime->control,
PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)));
kfree(runtime->hw_constraints.rules);
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
+ if (runtime->hwptr_log)
+ kfree(runtime->hwptr_log);
+#endif
kfree(runtime);
substream->runtime = NULL;
+ put_pid(substream->pid);
+ substream->pid = NULL;
substream->pstr->substream_opened--;
}
struct snd_pcm_substream *substream;
struct snd_pcm_notify *notify;
char str[16];
- struct snd_pcm *pcm = device->device_data;
+ struct snd_pcm *pcm;
struct device *dev;
- snd_assert(pcm != NULL && device != NULL, return -ENXIO);
+ if (snd_BUG_ON(!device || !device->device_data))
+ return -ENXIO;
+ pcm = device->device_data;
mutex_lock(®ister_mutex);
- if (snd_pcm_search(pcm->card, pcm->device)) {
+ err = snd_pcm_add(pcm);
+ if (err) {
mutex_unlock(®ister_mutex);
- return -EBUSY;
+ return err;
}
- list_add_tail(&pcm->list, &snd_pcm_devices);
for (cidx = 0; cidx < 2; cidx++) {
int devtype = -1;
- if (pcm->streams[cidx].substream == NULL)
+ if (pcm->streams[cidx].substream == NULL || pcm->internal)
continue;
switch (cidx) {
case SNDRV_PCM_STREAM_PLAYBACK:
{
struct snd_pcm *pcm;
- snd_assert(notify != NULL &&
- notify->n_register != NULL &&
- notify->n_unregister != NULL &&
- notify->n_disconnect, return -EINVAL);
+ if (snd_BUG_ON(!notify ||
+ !notify->n_register ||
+ !notify->n_unregister ||
+ !notify->n_disconnect))
+ return -EINVAL;
mutex_lock(®ister_mutex);
if (nfree) {
list_del(¬ify->list);