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https://github.com/joel16/android_kernel_sony_msm8994.git
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ALSA: add/change some comments describing function return values
script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Yacine Belkadi
Takashi Iwai
parent
a817650ebb
commit
eb7c06e8e9
@ -189,7 +189,6 @@ int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
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*
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* Add a virtual slave control to the given master element created via
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* snd_ctl_create_virtual_master() beforehand.
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* Returns zero if successful or a negative error code.
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*
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* All slaves must be the same type (returning the same information
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* via info callback). The function doesn't check it, so it's your
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@ -199,6 +198,8 @@ int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
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* at most two channels,
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* logarithmic volume control (dB level) thus no linear volume,
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* master can only attenuate the volume without gain
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*
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* Return: Zero if successful or a negative error code.
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*/
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static inline int
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snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
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@ -219,6 +220,8 @@ snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
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* When the control peeks the hardware values directly and the value
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* can be changed by other means than the put callback of the element,
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* this function should be used to keep the value always up-to-date.
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*
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* Return: Zero if successful or a negative error code.
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*/
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static inline int
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snd_ctl_add_slave_uncached(struct snd_kcontrol *master,
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@ -229,7 +229,7 @@ int snd_register_device_for_dev(int type, struct snd_card *card,
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* This function uses the card's device pointer to link to the
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* correct &struct device.
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*
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* Returns zero if successful, or a negative error code on failure.
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* Return: Zero if successful, or a negative error code on failure.
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*/
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static inline int snd_register_device(int type, struct snd_card *card, int dev,
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const struct file_operations *f_ops,
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@ -659,7 +659,7 @@ static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime
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*
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* Checks whether enough free space is available on the playback buffer.
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*
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* Returns non-zero if available, or zero if not.
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* Return: Non-zero if available, or zero if not.
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*/
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static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
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{
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@ -673,7 +673,7 @@ static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
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*
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* Checks whether enough capture data is available on the capture buffer.
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*
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* Returns non-zero if available, or zero if not.
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* Return: Non-zero if available, or zero if not.
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*/
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static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
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{
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@ -685,10 +685,10 @@ static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
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* snd_pcm_playback_data - check whether any data exists on the playback buffer
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* @substream: the pcm substream instance
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*
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* Checks whether any data exists on the playback buffer. If stop_threshold
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* is bigger or equal to boundary, then this function returns always non-zero.
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* Checks whether any data exists on the playback buffer.
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*
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* Returns non-zero if exists, or zero if not.
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* Return: Non-zero if any data exists, or zero if not. If stop_threshold
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* is bigger or equal to boundary, then this function returns always non-zero.
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*/
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static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
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{
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@ -705,7 +705,7 @@ static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
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*
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* Checks whether the playback buffer is empty.
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*
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* Returns non-zero if empty, or zero if not.
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* Return: Non-zero if empty, or zero if not.
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*/
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static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
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{
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@ -719,7 +719,7 @@ static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
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*
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* Checks whether the capture buffer is empty.
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*
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* Returns non-zero if empty, or zero if not.
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* Return: Non-zero if empty, or zero if not.
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*/
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static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
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{
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@ -852,7 +852,7 @@ int snd_pcm_format_big_endian(snd_pcm_format_t format);
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* snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
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* @format: the format to check
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*
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* Returns 1 if the given PCM format is CPU-endian, 0 if
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* Return: 1 if the given PCM format is CPU-endian, 0 if
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* opposite, or a negative error code if endian not specified.
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*/
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int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
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@ -963,7 +963,7 @@ struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
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* contiguous in kernel virtual space, but not in physical memory. Use this
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* if the buffer is accessed by kernel code but not by device DMA.
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*
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* Returns 1 if the buffer was changed, 0 if not changed, or a negative error
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* Return: 1 if the buffer was changed, 0 if not changed, or a negative error
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* code.
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*/
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static int snd_pcm_lib_alloc_vmalloc_buffer
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@ -975,6 +975,9 @@ static int snd_pcm_lib_alloc_vmalloc_buffer
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*
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* This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
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* vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
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*
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* Return: 1 if the buffer was changed, 0 if not changed, or a negative error
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* code.
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*/
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static int snd_pcm_lib_alloc_vmalloc_32_buffer
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(struct snd_pcm_substream *substream, size_t size);
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@ -1070,6 +1073,8 @@ const char *snd_pcm_format_name(snd_pcm_format_t format);
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/**
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* snd_pcm_stream_str - Get a string naming the direction of a stream
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* @substream: the pcm substream instance
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*
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* Return: A string naming the direction of the stream.
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*/
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static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
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{
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@ -190,7 +190,7 @@ EXPORT_SYMBOL(snd_ctl_notify);
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* Allocates a new struct snd_kcontrol instance and copies the given template
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* to the new instance. It does not copy volatile data (access).
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*
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* Returns the pointer of the new instance, or NULL on failure.
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* Return: The pointer of the new instance, or %NULL on failure.
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*/
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static struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control,
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unsigned int access)
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@ -224,7 +224,7 @@ static struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control,
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* template. When the access field of ncontrol is 0, it's assumed as
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* READWRITE access. When the count field is 0, it's assumes as one.
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*
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* Returns the pointer of the newly generated instance, or NULL on failure.
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* Return: The pointer of the newly generated instance, or %NULL on failure.
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*/
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struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new *ncontrol,
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void *private_data)
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@ -322,9 +322,10 @@ static int snd_ctl_find_hole(struct snd_card *card, unsigned int count)
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* snd_ctl_new1() to the given card. Assigns also an unique
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* numid used for fast search.
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*
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* Returns zero if successful, or a negative error code on failure.
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*
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* It frees automatically the control which cannot be added.
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*
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* Return: Zero if successful, or a negative error code on failure.
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*
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*/
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int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
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{
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@ -380,9 +381,9 @@ EXPORT_SYMBOL(snd_ctl_add);
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* and the add_on_replace flag is set, the control is added. If the
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* control exists, it is destroyed first.
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*
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* Returns zero if successful, or a negative error code on failure.
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*
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* It frees automatically the control which cannot be added or replaced.
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*
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* Return: Zero if successful, or a negative error code on failure.
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*/
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int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol,
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bool add_on_replace)
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@ -442,8 +443,8 @@ EXPORT_SYMBOL(snd_ctl_replace);
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* Removes the control from the card and then releases the instance.
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* You don't need to call snd_ctl_free_one(). You must be in
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* the write lock - down_write(&card->controls_rwsem).
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*
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* Returns 0 if successful, or a negative error code on failure.
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*
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* Return: 0 if successful, or a negative error code on failure.
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*/
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int snd_ctl_remove(struct snd_card *card, struct snd_kcontrol *kcontrol)
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{
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@ -470,8 +471,8 @@ EXPORT_SYMBOL(snd_ctl_remove);
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*
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* Finds the control instance with the given id, removes it from the
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* card list and releases it.
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*
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* Returns 0 if successful, or a negative error code on failure.
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*
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* Return: 0 if successful, or a negative error code on failure.
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*/
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int snd_ctl_remove_id(struct snd_card *card, struct snd_ctl_elem_id *id)
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{
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@ -498,8 +499,8 @@ EXPORT_SYMBOL(snd_ctl_remove_id);
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*
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* Finds the control instance with the given id, removes it from the
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* card list and releases it.
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*
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* Returns 0 if successful, or a negative error code on failure.
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*
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* Return: 0 if successful, or a negative error code on failure.
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*/
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static int snd_ctl_remove_user_ctl(struct snd_ctl_file * file,
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struct snd_ctl_elem_id *id)
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@ -541,7 +542,7 @@ error:
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* Finds the control instance with the given id, and activate or
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* inactivate the control together with notification, if changed.
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*
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* Returns 0 if unchanged, 1 if changed, or a negative error code on failure.
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* Return: 0 if unchanged, 1 if changed, or a negative error code on failure.
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*/
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int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id,
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int active)
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@ -587,7 +588,7 @@ EXPORT_SYMBOL_GPL(snd_ctl_activate_id);
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* Finds the control with the old id from the card, and replaces the
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* id with the new one.
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*
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* Returns zero if successful, or a negative error code on failure.
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* Return: Zero if successful, or a negative error code on failure.
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*/
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int snd_ctl_rename_id(struct snd_card *card, struct snd_ctl_elem_id *src_id,
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struct snd_ctl_elem_id *dst_id)
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@ -616,10 +617,11 @@ EXPORT_SYMBOL(snd_ctl_rename_id);
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*
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* Finds the control instance with the given number-id from the card.
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*
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* Returns the pointer of the instance if found, or NULL if not.
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*
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* The caller must down card->controls_rwsem before calling this function
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* (if the race condition can happen).
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*
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* Return: The pointer of the instance if found, or %NULL if not.
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*
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*/
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struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numid)
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{
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@ -643,10 +645,11 @@ EXPORT_SYMBOL(snd_ctl_find_numid);
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*
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* Finds the control instance with the given id from the card.
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*
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* Returns the pointer of the instance if found, or NULL if not.
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*
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* The caller must down card->controls_rwsem before calling this function
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* (if the race condition can happen).
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*
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* Return: The pointer of the instance if found, or %NULL if not.
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*
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*/
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struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card,
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struct snd_ctl_elem_id *id)
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@ -1710,6 +1713,8 @@ EXPORT_SYMBOL(snd_ctl_boolean_stereo_info);
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* Sets all required fields in @info to their appropriate values.
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* If the control's accessibility is not the default (readable and writable),
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* the caller has to fill @info->access.
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*
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* Return: Zero.
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*/
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int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels,
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unsigned int items, const char *const names[])
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@ -39,7 +39,7 @@
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* The data pointer plays a role as the identifier, too, so the
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* pointer address must be unique and unchanged.
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*
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* Returns zero if successful, or a negative error code on failure.
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* Return: Zero if successful, or a negative error code on failure.
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*/
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int snd_device_new(struct snd_card *card, snd_device_type_t type,
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void *device_data, struct snd_device_ops *ops)
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@ -73,7 +73,7 @@ EXPORT_SYMBOL(snd_device_new);
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* callbacks, dev_disconnect and dev_free, corresponding to the state.
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* Then release the device.
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*
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* Returns zero if successful, or a negative error code on failure or if the
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* Return: Zero if successful, or a negative error code on failure or if the
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* device not found.
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*/
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int snd_device_free(struct snd_card *card, void *device_data)
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@ -116,7 +116,7 @@ EXPORT_SYMBOL(snd_device_free);
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*
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* Usually called from snd_card_disconnect().
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*
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* Returns zero if successful, or a negative error code on failure or if the
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* Return: Zero if successful, or a negative error code on failure or if the
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* device not found.
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*/
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int snd_device_disconnect(struct snd_card *card, void *device_data)
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@ -151,7 +151,7 @@ int snd_device_disconnect(struct snd_card *card, void *device_data)
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* but it can be called later if any new devices are created after
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* invocation of snd_card_register().
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*
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* Returns zero if successful, or a negative error code on failure or if the
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* Return: Zero if successful, or a negative error code on failure or if the
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* device not found.
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*/
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int snd_device_register(struct snd_card *card, void *device_data)
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@ -356,7 +356,7 @@ static const struct file_operations snd_hwdep_f_ops =
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* The callbacks (hwdep->ops) must be set on the returned instance
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* after this call manually by the caller.
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*
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* Returns zero if successful, or a negative error code on failure.
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* Return: Zero if successful, or a negative error code on failure.
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*/
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int snd_hwdep_new(struct snd_card *card, char *id, int device,
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struct snd_hwdep **rhwdep)
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@ -105,7 +105,7 @@ static int resize_info_buffer(struct snd_info_buffer *buffer,
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*
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* Outputs the string on the procfs buffer just like printf().
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*
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* Returns the size of output string.
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* Return: The size of output string, or a negative error code.
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*/
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int snd_iprintf(struct snd_info_buffer *buffer, const char *fmt, ...)
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{
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@ -694,7 +694,7 @@ int snd_info_card_free(struct snd_card *card)
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*
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* Reads one line from the buffer and stores the string.
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*
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* Returns zero if successful, or 1 if error or EOF.
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* Return: Zero if successful, or 1 if error or EOF.
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*/
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int snd_info_get_line(struct snd_info_buffer *buffer, char *line, int len)
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{
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@ -735,7 +735,7 @@ EXPORT_SYMBOL(snd_info_get_line);
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* Parses the original string and copy a token to the given
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* string buffer.
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*
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* Returns the updated pointer of the original string so that
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* Return: The updated pointer of the original string so that
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* it can be used for the next call.
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*/
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const char *snd_info_get_str(char *dest, const char *src, int len)
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@ -774,7 +774,7 @@ EXPORT_SYMBOL(snd_info_get_str);
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* Usually called from other functions such as
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* snd_info_create_card_entry().
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*
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* Returns the pointer of the new instance, or NULL on failure.
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* Return: The pointer of the new instance, or %NULL on failure.
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*/
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static struct snd_info_entry *snd_info_create_entry(const char *name)
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{
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@ -803,7 +803,7 @@ static struct snd_info_entry *snd_info_create_entry(const char *name)
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*
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* Creates a new info entry and assigns it to the given module.
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*
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* Returns the pointer of the new instance, or NULL on failure.
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* Return: The pointer of the new instance, or %NULL on failure.
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*/
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struct snd_info_entry *snd_info_create_module_entry(struct module * module,
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const char *name,
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@ -827,7 +827,7 @@ EXPORT_SYMBOL(snd_info_create_module_entry);
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*
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* Creates a new info entry and assigns it to the given card.
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*
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* Returns the pointer of the new instance, or NULL on failure.
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* Return: The pointer of the new instance, or %NULL on failure.
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*/
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struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card,
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const char *name,
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@ -893,7 +893,7 @@ static int snd_info_dev_register_entry(struct snd_device *device)
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* For releasing this entry, use snd_device_free() instead of
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* snd_info_free_entry().
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*
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* Returns zero if successful, or a negative error code on failure.
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* Return: Zero if successful, or a negative error code on failure.
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*/
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int snd_card_proc_new(struct snd_card *card, const char *name,
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struct snd_info_entry **entryp)
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@ -949,7 +949,7 @@ EXPORT_SYMBOL(snd_info_free_entry);
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*
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* Registers the proc info entry.
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*
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* Returns zero if successful, or a negative error code on failure.
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* Return: Zero if successful, or a negative error code on failure.
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*/
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int snd_info_register(struct snd_info_entry * entry)
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{
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@ -144,7 +144,7 @@ static inline int init_info_for_card(struct snd_card *card)
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* space for the driver to use freely. The allocated struct is stored
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* in the given card_ret pointer.
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*
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* Returns zero if successful or a negative error code.
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* Return: Zero if successful or a negative error code.
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*/
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int snd_card_create(int idx, const char *xid,
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struct module *module, int extra_size,
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@ -337,7 +337,7 @@ static const struct file_operations snd_shutdown_f_ops =
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*
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* Disconnects all APIs from the file-operations (user space).
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*
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* Returns zero, otherwise a negative error code.
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* Return: Zero, otherwise a negative error code.
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*
|
||||
* Note: The current implementation replaces all active file->f_op with special
|
||||
* dummy file operations (they do nothing except release).
|
||||
@ -415,7 +415,7 @@ EXPORT_SYMBOL(snd_card_disconnect);
|
||||
* devices automatically. That is, you don't have to release the devices
|
||||
* by yourself.
|
||||
*
|
||||
* Returns zero. Frees all associated devices and frees the control
|
||||
* Return: Zero. Frees all associated devices and frees the control
|
||||
* interface associated to given soundcard.
|
||||
*/
|
||||
static int snd_card_do_free(struct snd_card *card)
|
||||
@ -677,7 +677,7 @@ static struct device_attribute card_number_attrs =
|
||||
* external accesses. Thus, you should call this function at the end
|
||||
* of the initialization of the card.
|
||||
*
|
||||
* Returns zero otherwise a negative error code if the registration failed.
|
||||
* Return: Zero otherwise a negative error code if the registration failed.
|
||||
*/
|
||||
int snd_card_register(struct snd_card *card)
|
||||
{
|
||||
@ -849,7 +849,7 @@ int __exit snd_card_info_done(void)
|
||||
* This function adds the component id string to the supported list.
|
||||
* The component can be referred from the alsa-lib.
|
||||
*
|
||||
* Returns zero otherwise a negative error code.
|
||||
* Return: Zero otherwise a negative error code.
|
||||
*/
|
||||
|
||||
int snd_component_add(struct snd_card *card, const char *component)
|
||||
@ -883,7 +883,7 @@ EXPORT_SYMBOL(snd_component_add);
|
||||
* This linked-list is used to keep tracking the connection state,
|
||||
* and to avoid the release of busy resources by hotplug.
|
||||
*
|
||||
* Returns zero or a negative error code.
|
||||
* Return: zero or a negative error code.
|
||||
*/
|
||||
int snd_card_file_add(struct snd_card *card, struct file *file)
|
||||
{
|
||||
@ -920,7 +920,7 @@ EXPORT_SYMBOL(snd_card_file_add);
|
||||
* called beforehand, it processes the pending release of
|
||||
* resources.
|
||||
*
|
||||
* Returns zero or a negative error code.
|
||||
* Return: Zero or a negative error code.
|
||||
*/
|
||||
int snd_card_file_remove(struct snd_card *card, struct file *file)
|
||||
{
|
||||
@ -959,6 +959,8 @@ EXPORT_SYMBOL(snd_card_file_remove);
|
||||
*
|
||||
* Waits until the power-state is changed.
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code.
|
||||
*
|
||||
* Note: the power lock must be active before call.
|
||||
*/
|
||||
int snd_power_wait(struct snd_card *card, unsigned int power_state)
|
||||
|
||||
@ -81,7 +81,7 @@ EXPORT_SYMBOL(snd_dma_disable);
|
||||
* @dma: the dma number
|
||||
* @size: the dma transfer size
|
||||
*
|
||||
* Returns the current pointer in DMA tranfer buffer in bytes
|
||||
* Return: The current pointer in DMA transfer buffer in bytes.
|
||||
*/
|
||||
unsigned int snd_dma_pointer(unsigned long dma, unsigned int size)
|
||||
{
|
||||
|
||||
@ -98,8 +98,8 @@ static int snd_jack_dev_register(struct snd_device *device)
|
||||
*
|
||||
* Creates a new jack object.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* On success jjack will be initialised.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
* On success @jjack will be initialised.
|
||||
*/
|
||||
int snd_jack_new(struct snd_card *card, const char *id, int type,
|
||||
struct snd_jack **jjack)
|
||||
@ -189,6 +189,8 @@ EXPORT_SYMBOL(snd_jack_set_parent);
|
||||
* using this abstraction.
|
||||
*
|
||||
* This function may only be called prior to registration of the jack.
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_jack_set_key(struct snd_jack *jack, enum snd_jack_types type,
|
||||
int keytype)
|
||||
|
||||
@ -81,7 +81,7 @@ static inline void dec_snd_pages(int order)
|
||||
*
|
||||
* Allocates the physically contiguous pages with the given size.
|
||||
*
|
||||
* Returns the pointer of the buffer, or NULL if no enoguh memory.
|
||||
* Return: The pointer of the buffer, or %NULL if no enough memory.
|
||||
*/
|
||||
void *snd_malloc_pages(size_t size, gfp_t gfp_flags)
|
||||
{
|
||||
@ -175,9 +175,9 @@ static void snd_free_dev_pages(struct device *dev, size_t size, void *ptr,
|
||||
*
|
||||
* Calls the memory-allocator function for the corresponding
|
||||
* buffer type.
|
||||
*
|
||||
* Returns zero if the buffer with the given size is allocated successfully,
|
||||
* other a negative value at error.
|
||||
*
|
||||
* Return: Zero if the buffer with the given size is allocated successfully,
|
||||
* otherwise a negative value on error.
|
||||
*/
|
||||
int snd_dma_alloc_pages(int type, struct device *device, size_t size,
|
||||
struct snd_dma_buffer *dmab)
|
||||
@ -229,9 +229,9 @@ int snd_dma_alloc_pages(int type, struct device *device, size_t size,
|
||||
* buffer type. When no space is left, this function reduces the size and
|
||||
* tries to allocate again. The size actually allocated is stored in
|
||||
* res_size argument.
|
||||
*
|
||||
* Returns zero if the buffer with the given size is allocated successfully,
|
||||
* other a negative value at error.
|
||||
*
|
||||
* Return: Zero if the buffer with the given size is allocated successfully,
|
||||
* otherwise a negative value on error.
|
||||
*/
|
||||
int snd_dma_alloc_pages_fallback(int type, struct device *device, size_t size,
|
||||
struct snd_dma_buffer *dmab)
|
||||
@ -292,7 +292,7 @@ void snd_dma_free_pages(struct snd_dma_buffer *dmab)
|
||||
* Looks for the reserved-buffer list and re-uses if the same buffer
|
||||
* is found in the list. When the buffer is found, it's removed from the free list.
|
||||
*
|
||||
* Returns the size of buffer if the buffer is found, or zero if not found.
|
||||
* Return: The size of buffer if the buffer is found, or zero if not found.
|
||||
*/
|
||||
size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id)
|
||||
{
|
||||
@ -326,8 +326,8 @@ size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id)
|
||||
* @id: the buffer id
|
||||
*
|
||||
* Reserves the given buffer as a reserved buffer.
|
||||
*
|
||||
* Returns zero if successful, or a negative code at error.
|
||||
*
|
||||
* Return: Zero if successful, or a negative code on error.
|
||||
*/
|
||||
int snd_dma_reserve_buf(struct snd_dma_buffer *dmab, unsigned int id)
|
||||
{
|
||||
|
||||
@ -33,7 +33,7 @@
|
||||
*
|
||||
* Copies the data from mmio-space to user-space.
|
||||
*
|
||||
* Returns zero if successful, or non-zero on failure.
|
||||
* Return: Zero if successful, or non-zero on failure.
|
||||
*/
|
||||
int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count)
|
||||
{
|
||||
@ -66,7 +66,7 @@ EXPORT_SYMBOL(copy_to_user_fromio);
|
||||
*
|
||||
* Copies the data from user-space to mmio-space.
|
||||
*
|
||||
* Returns zero if successful, or non-zero on failure.
|
||||
* Return: Zero if successful, or non-zero on failure.
|
||||
*/
|
||||
int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count)
|
||||
{
|
||||
|
||||
@ -637,7 +637,7 @@ static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substrea
|
||||
* calling this, i.e. zero must be given to the argument of
|
||||
* snd_pcm_new().
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
|
||||
{
|
||||
@ -759,7 +759,7 @@ static int _snd_pcm_new(struct snd_card *card, const char *id, int device,
|
||||
* 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.
|
||||
* Return: 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)
|
||||
@ -787,7 +787,7 @@ EXPORT_SYMBOL(snd_pcm_new);
|
||||
* 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.
|
||||
* Return: 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,
|
||||
|
||||
@ -666,7 +666,8 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
|
||||
* The interval is changed to the range satisfying both intervals.
|
||||
* The interval status (min, max, integer, etc.) are evaluated.
|
||||
*
|
||||
* Returns non-zero if the value is changed, zero if not changed.
|
||||
* Return: Positive if the value is changed, zero if it's not changed, or a
|
||||
* negative error code.
|
||||
*/
|
||||
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v)
|
||||
{
|
||||
@ -865,7 +866,8 @@ void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
|
||||
* @nump: pointer to store the resultant numerator
|
||||
* @denp: pointer to store the resultant denominator
|
||||
*
|
||||
* Returns non-zero if the value is changed, zero if not changed.
|
||||
* Return: Positive if the value is changed, zero if it's not changed, or a
|
||||
* negative error code.
|
||||
*/
|
||||
int snd_interval_ratnum(struct snd_interval *i,
|
||||
unsigned int rats_count, struct snd_ratnum *rats,
|
||||
@ -983,7 +985,8 @@ EXPORT_SYMBOL(snd_interval_ratnum);
|
||||
* @nump: pointer to store the resultant numerator
|
||||
* @denp: pointer to store the resultant denominator
|
||||
*
|
||||
* Returns non-zero if the value is changed, zero if not changed.
|
||||
* Return: Positive if the value is changed, zero if it's not changed, or a
|
||||
* negative error code.
|
||||
*/
|
||||
static int snd_interval_ratden(struct snd_interval *i,
|
||||
unsigned int rats_count, struct snd_ratden *rats,
|
||||
@ -1082,7 +1085,8 @@ static int snd_interval_ratden(struct snd_interval *i,
|
||||
* When mask is non-zero, only the elements corresponding to bit 1 are
|
||||
* evaluated.
|
||||
*
|
||||
* Returns non-zero if the value is changed, zero if not changed.
|
||||
* Return: Positive if the value is changed, zero if it's not changed, or a
|
||||
* negative error code.
|
||||
*/
|
||||
int snd_interval_list(struct snd_interval *i, unsigned int count,
|
||||
const unsigned int *list, unsigned int mask)
|
||||
@ -1142,7 +1146,7 @@ static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned
|
||||
* @private: the private data pointer passed to function
|
||||
* @dep: the dependent variables
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
|
||||
int var,
|
||||
@ -1200,6 +1204,8 @@ EXPORT_SYMBOL(snd_pcm_hw_rule_add);
|
||||
* @mask: the bitmap mask
|
||||
*
|
||||
* Apply the constraint of the given bitmap mask to a 32-bit mask parameter.
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
||||
u_int32_t mask)
|
||||
@ -1220,6 +1226,8 @@ int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param
|
||||
* @mask: the 64bit bitmap mask
|
||||
*
|
||||
* Apply the constraint of the given bitmap mask to a 64-bit mask parameter.
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
||||
u_int64_t mask)
|
||||
@ -1240,6 +1248,9 @@ int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_par
|
||||
* @var: hw_params variable to apply the integer constraint
|
||||
*
|
||||
* Apply the constraint of integer to an interval parameter.
|
||||
*
|
||||
* Return: Positive if the value is changed, zero if it's not changed, or a
|
||||
* negative error code.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var)
|
||||
{
|
||||
@ -1257,6 +1268,9 @@ EXPORT_SYMBOL(snd_pcm_hw_constraint_integer);
|
||||
* @max: the maximal value
|
||||
*
|
||||
* Apply the min/max range constraint to an interval parameter.
|
||||
*
|
||||
* Return: Positive if the value is changed, zero if it's not changed, or a
|
||||
* negative error code.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
||||
unsigned int min, unsigned int max)
|
||||
@ -1288,6 +1302,8 @@ static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params,
|
||||
* @l: list
|
||||
*
|
||||
* Apply the list of constraints to an interval parameter.
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
|
||||
unsigned int cond,
|
||||
@ -1322,6 +1338,8 @@ static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params,
|
||||
* @cond: condition bits
|
||||
* @var: hw_params variable to apply the ratnums constraint
|
||||
* @r: struct snd_ratnums constriants
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
|
||||
unsigned int cond,
|
||||
@ -1355,6 +1373,8 @@ static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params,
|
||||
* @cond: condition bits
|
||||
* @var: hw_params variable to apply the ratdens constraint
|
||||
* @r: struct snd_ratdens constriants
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
|
||||
unsigned int cond,
|
||||
@ -1386,6 +1406,8 @@ static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params,
|
||||
* @cond: condition bits
|
||||
* @width: sample bits width
|
||||
* @msbits: msbits width
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
|
||||
unsigned int cond,
|
||||
@ -1414,6 +1436,8 @@ static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params,
|
||||
* @cond: condition bits
|
||||
* @var: hw_params variable to apply the step constraint
|
||||
* @step: step size
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
|
||||
unsigned int cond,
|
||||
@ -1444,6 +1468,8 @@ static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm
|
||||
* @runtime: PCM runtime instance
|
||||
* @cond: condition bits
|
||||
* @var: hw_params variable to apply the power-of-2 constraint
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
|
||||
unsigned int cond,
|
||||
@ -1470,6 +1496,8 @@ static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params,
|
||||
* snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling
|
||||
* @runtime: PCM runtime instance
|
||||
* @base_rate: the rate at which the hardware does not resample
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
|
||||
unsigned int base_rate)
|
||||
@ -1519,8 +1547,8 @@ EXPORT_SYMBOL(_snd_pcm_hw_params_any);
|
||||
* @var: parameter to retrieve
|
||||
* @dir: pointer to the direction (-1,0,1) or %NULL
|
||||
*
|
||||
* Return the value for field @var if it's fixed in configuration space
|
||||
* defined by @params. Return -%EINVAL otherwise.
|
||||
* Return: The value for field @var if it's fixed in configuration space
|
||||
* defined by @params. -%EINVAL otherwise.
|
||||
*/
|
||||
int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
|
||||
snd_pcm_hw_param_t var, int *dir)
|
||||
@ -1591,7 +1619,8 @@ static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params,
|
||||
*
|
||||
* Inside configuration space defined by @params remove from @var all
|
||||
* values > minimum. Reduce configuration space accordingly.
|
||||
* Return the minimum.
|
||||
*
|
||||
* Return: The minimum, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm,
|
||||
struct snd_pcm_hw_params *params,
|
||||
@ -1637,7 +1666,8 @@ static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params,
|
||||
*
|
||||
* Inside configuration space defined by @params remove from @var all
|
||||
* values < maximum. Reduce configuration space accordingly.
|
||||
* Return the maximum.
|
||||
*
|
||||
* Return: The maximum, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm,
|
||||
struct snd_pcm_hw_params *params,
|
||||
@ -1665,6 +1695,8 @@ EXPORT_SYMBOL(snd_pcm_hw_param_last);
|
||||
* The configuration chosen is that obtained fixing in this order:
|
||||
* first access, first format, first subformat, min channels,
|
||||
* min rate, min period time, max buffer size, min tick time
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
|
||||
struct snd_pcm_hw_params *params)
|
||||
@ -1771,7 +1803,7 @@ static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream,
|
||||
* Processes the generic ioctl commands for PCM.
|
||||
* Can be passed as the ioctl callback for PCM ops.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
|
||||
unsigned int cmd, void *arg)
|
||||
@ -2510,7 +2542,7 @@ static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol)
|
||||
* @info_ret: store struct snd_pcm_chmap instance if non-NULL
|
||||
*
|
||||
* Create channel-mapping control elements assigned to the given PCM stream(s).
|
||||
* Returns zero if succeed, or a negative error value.
|
||||
* Return: Zero if successful, or a negative error value.
|
||||
*/
|
||||
int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
|
||||
const struct snd_pcm_chmap_elem *chmap,
|
||||
|
||||
@ -95,7 +95,7 @@ static void snd_pcm_lib_preallocate_dma_free(struct snd_pcm_substream *substream
|
||||
*
|
||||
* Releases the pre-allocated buffer of the given substream.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream)
|
||||
{
|
||||
@ -115,7 +115,7 @@ int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream)
|
||||
*
|
||||
* Releases all the pre-allocated buffers on the given pcm.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm)
|
||||
{
|
||||
@ -265,7 +265,7 @@ static int snd_pcm_lib_preallocate_pages1(struct snd_pcm_substream *substream,
|
||||
* destruction time. The dma_buf_id must be unique for all systems
|
||||
* (in the same DMA buffer type) e.g. using snd_dma_pci_buf_id().
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
|
||||
int type, struct device *data,
|
||||
@ -289,7 +289,7 @@ EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages);
|
||||
* Do pre-allocation to all substreams of the given pcm for the
|
||||
* specified DMA type.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
|
||||
int type, void *data,
|
||||
@ -313,8 +313,9 @@ EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages_for_all);
|
||||
* @substream: the pcm substream instance
|
||||
* @offset: the buffer offset
|
||||
*
|
||||
* Returns the page struct at the given buffer offset.
|
||||
* Used as the page callback of PCM ops.
|
||||
*
|
||||
* Return: The page struct at the given buffer offset. %NULL on failure.
|
||||
*/
|
||||
struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset)
|
||||
{
|
||||
@ -337,7 +338,7 @@ EXPORT_SYMBOL(snd_pcm_sgbuf_ops_page);
|
||||
* Allocates the DMA buffer on the BUS type given earlier to
|
||||
* snd_pcm_lib_preallocate_xxx_pages().
|
||||
*
|
||||
* Returns 1 if the buffer is changed, 0 if not changed, or a negative
|
||||
* Return: 1 if the buffer is changed, 0 if not changed, or a negative
|
||||
* code on failure.
|
||||
*/
|
||||
int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size)
|
||||
@ -390,7 +391,7 @@ EXPORT_SYMBOL(snd_pcm_lib_malloc_pages);
|
||||
*
|
||||
* Releases the DMA buffer allocated via snd_pcm_lib_malloc_pages().
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream)
|
||||
{
|
||||
@ -437,6 +438,8 @@ EXPORT_SYMBOL(_snd_pcm_lib_alloc_vmalloc_buffer);
|
||||
* snd_pcm_lib_free_vmalloc_buffer - free vmalloc buffer
|
||||
* @substream: the substream with a buffer allocated by
|
||||
* snd_pcm_lib_alloc_vmalloc_buffer()
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream)
|
||||
{
|
||||
@ -458,6 +461,8 @@ EXPORT_SYMBOL(snd_pcm_lib_free_vmalloc_buffer);
|
||||
* @offset: offset in the buffer
|
||||
*
|
||||
* This function is to be used as the page callback in the PCM ops.
|
||||
*
|
||||
* Return: The page struct, or %NULL on failure.
|
||||
*/
|
||||
struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
|
||||
unsigned long offset)
|
||||
|
||||
@ -213,7 +213,7 @@ static struct pcm_format_data pcm_formats[(INT)SNDRV_PCM_FORMAT_LAST+1] = {
|
||||
* snd_pcm_format_signed - Check the PCM format is signed linear
|
||||
* @format: the format to check
|
||||
*
|
||||
* Returns 1 if the given PCM format is signed linear, 0 if unsigned
|
||||
* Return: 1 if the given PCM format is signed linear, 0 if unsigned
|
||||
* linear, and a negative error code for non-linear formats.
|
||||
*/
|
||||
int snd_pcm_format_signed(snd_pcm_format_t format)
|
||||
@ -232,7 +232,7 @@ EXPORT_SYMBOL(snd_pcm_format_signed);
|
||||
* snd_pcm_format_unsigned - Check the PCM format is unsigned linear
|
||||
* @format: the format to check
|
||||
*
|
||||
* Returns 1 if the given PCM format is unsigned linear, 0 if signed
|
||||
* Return: 1 if the given PCM format is unsigned linear, 0 if signed
|
||||
* linear, and a negative error code for non-linear formats.
|
||||
*/
|
||||
int snd_pcm_format_unsigned(snd_pcm_format_t format)
|
||||
@ -251,7 +251,7 @@ EXPORT_SYMBOL(snd_pcm_format_unsigned);
|
||||
* snd_pcm_format_linear - Check the PCM format is linear
|
||||
* @format: the format to check
|
||||
*
|
||||
* Returns 1 if the given PCM format is linear, 0 if not.
|
||||
* Return: 1 if the given PCM format is linear, 0 if not.
|
||||
*/
|
||||
int snd_pcm_format_linear(snd_pcm_format_t format)
|
||||
{
|
||||
@ -264,7 +264,7 @@ EXPORT_SYMBOL(snd_pcm_format_linear);
|
||||
* snd_pcm_format_little_endian - Check the PCM format is little-endian
|
||||
* @format: the format to check
|
||||
*
|
||||
* Returns 1 if the given PCM format is little-endian, 0 if
|
||||
* Return: 1 if the given PCM format is little-endian, 0 if
|
||||
* big-endian, or a negative error code if endian not specified.
|
||||
*/
|
||||
int snd_pcm_format_little_endian(snd_pcm_format_t format)
|
||||
@ -283,7 +283,7 @@ EXPORT_SYMBOL(snd_pcm_format_little_endian);
|
||||
* snd_pcm_format_big_endian - Check the PCM format is big-endian
|
||||
* @format: the format to check
|
||||
*
|
||||
* Returns 1 if the given PCM format is big-endian, 0 if
|
||||
* Return: 1 if the given PCM format is big-endian, 0 if
|
||||
* little-endian, or a negative error code if endian not specified.
|
||||
*/
|
||||
int snd_pcm_format_big_endian(snd_pcm_format_t format)
|
||||
@ -302,7 +302,7 @@ EXPORT_SYMBOL(snd_pcm_format_big_endian);
|
||||
* snd_pcm_format_width - return the bit-width of the format
|
||||
* @format: the format to check
|
||||
*
|
||||
* Returns the bit-width of the format, or a negative error code
|
||||
* Return: The bit-width of the format, or a negative error code
|
||||
* if unknown format.
|
||||
*/
|
||||
int snd_pcm_format_width(snd_pcm_format_t format)
|
||||
@ -321,7 +321,7 @@ EXPORT_SYMBOL(snd_pcm_format_width);
|
||||
* snd_pcm_format_physical_width - return the physical bit-width of the format
|
||||
* @format: the format to check
|
||||
*
|
||||
* Returns the physical bit-width of the format, or a negative error code
|
||||
* Return: The physical bit-width of the format, or a negative error code
|
||||
* if unknown format.
|
||||
*/
|
||||
int snd_pcm_format_physical_width(snd_pcm_format_t format)
|
||||
@ -341,7 +341,7 @@ EXPORT_SYMBOL(snd_pcm_format_physical_width);
|
||||
* @format: the format to check
|
||||
* @samples: sampling rate
|
||||
*
|
||||
* Returns the byte size of the given samples for the format, or a
|
||||
* Return: The byte size of the given samples for the format, or a
|
||||
* negative error code if unknown format.
|
||||
*/
|
||||
ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples)
|
||||
@ -358,7 +358,7 @@ EXPORT_SYMBOL(snd_pcm_format_size);
|
||||
* snd_pcm_format_silence_64 - return the silent data in 8 bytes array
|
||||
* @format: the format to check
|
||||
*
|
||||
* Returns the format pattern to fill or NULL if error.
|
||||
* Return: The format pattern to fill or %NULL if error.
|
||||
*/
|
||||
const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format)
|
||||
{
|
||||
@ -379,7 +379,7 @@ EXPORT_SYMBOL(snd_pcm_format_silence_64);
|
||||
*
|
||||
* Sets the silence data on the buffer for the given samples.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_pcm_format_set_silence(snd_pcm_format_t format, void *data, unsigned int samples)
|
||||
{
|
||||
@ -449,7 +449,7 @@ EXPORT_SYMBOL(snd_pcm_format_set_silence);
|
||||
* Determines the rate_min and rate_max fields from the rates bits of
|
||||
* the given runtime->hw.
|
||||
*
|
||||
* Returns zero if successful.
|
||||
* Return: Zero if successful.
|
||||
*/
|
||||
int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime)
|
||||
{
|
||||
@ -475,7 +475,7 @@ EXPORT_SYMBOL(snd_pcm_limit_hw_rates);
|
||||
* snd_pcm_rate_to_rate_bit - converts sample rate to SNDRV_PCM_RATE_xxx bit
|
||||
* @rate: the sample rate to convert
|
||||
*
|
||||
* Returns the SNDRV_PCM_RATE_xxx flag that corresponds to the given rate, or
|
||||
* Return: The SNDRV_PCM_RATE_xxx flag that corresponds to the given rate, or
|
||||
* SNDRV_PCM_RATE_KNOT for an unknown rate.
|
||||
*/
|
||||
unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate)
|
||||
@ -493,8 +493,8 @@ EXPORT_SYMBOL(snd_pcm_rate_to_rate_bit);
|
||||
* snd_pcm_rate_bit_to_rate - converts SNDRV_PCM_RATE_xxx bit to sample rate
|
||||
* @rate_bit: the rate bit to convert
|
||||
*
|
||||
* Returns the sample rate that corresponds to the given SNDRV_PCM_RATE_xxx flag
|
||||
* or 0 for an unknown rate bit
|
||||
* Return: The sample rate that corresponds to the given SNDRV_PCM_RATE_xxx flag
|
||||
* or 0 for an unknown rate bit.
|
||||
*/
|
||||
unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit)
|
||||
{
|
||||
|
||||
@ -898,6 +898,8 @@ static struct action_ops snd_pcm_action_start = {
|
||||
/**
|
||||
* snd_pcm_start - start all linked streams
|
||||
* @substream: the PCM substream instance
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code.
|
||||
*/
|
||||
int snd_pcm_start(struct snd_pcm_substream *substream)
|
||||
{
|
||||
@ -951,6 +953,8 @@ static struct action_ops snd_pcm_action_stop = {
|
||||
* @state: PCM state after stopping the stream
|
||||
*
|
||||
* The state of each stream is then changed to the given state unconditionally.
|
||||
*
|
||||
* Return: Zero if succesful, or a negative error code.
|
||||
*/
|
||||
int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
|
||||
{
|
||||
@ -965,6 +969,8 @@ EXPORT_SYMBOL(snd_pcm_stop);
|
||||
*
|
||||
* After stopping, the state is changed to SETUP.
|
||||
* Unlike snd_pcm_stop(), this affects only the given stream.
|
||||
*
|
||||
* Return: Zero if succesful, or a negative error code.
|
||||
*/
|
||||
int snd_pcm_drain_done(struct snd_pcm_substream *substream)
|
||||
{
|
||||
@ -1098,6 +1104,9 @@ static struct action_ops snd_pcm_action_suspend = {
|
||||
* @substream: the PCM substream
|
||||
*
|
||||
* After this call, all streams are changed to SUSPENDED state.
|
||||
*
|
||||
* Return: Zero if successful (or @substream is %NULL), or a negative error
|
||||
* code.
|
||||
*/
|
||||
int snd_pcm_suspend(struct snd_pcm_substream *substream)
|
||||
{
|
||||
@ -1120,6 +1129,8 @@ EXPORT_SYMBOL(snd_pcm_suspend);
|
||||
* @pcm: the PCM instance
|
||||
*
|
||||
* After this call, all streams are changed to SUSPENDED state.
|
||||
*
|
||||
* Return: Zero if successful (or @pcm is %NULL), or a negative error code.
|
||||
*/
|
||||
int snd_pcm_suspend_all(struct snd_pcm *pcm)
|
||||
{
|
||||
@ -1343,6 +1354,8 @@ static struct action_ops snd_pcm_action_prepare = {
|
||||
* snd_pcm_prepare - prepare the PCM substream to be triggerable
|
||||
* @substream: the PCM substream instance
|
||||
* @file: file to refer f_flags
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code.
|
||||
*/
|
||||
static int snd_pcm_prepare(struct snd_pcm_substream *substream,
|
||||
struct file *file)
|
||||
|
||||
@ -863,7 +863,7 @@ static int snd_rawmidi_control_ioctl(struct snd_card *card,
|
||||
*
|
||||
* Reads the data from the internal buffer.
|
||||
*
|
||||
* Returns the size of read data, or a negative error code on failure.
|
||||
* Return: The size of read data, or a negative error code on failure.
|
||||
*/
|
||||
int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
|
||||
const unsigned char *buffer, int count)
|
||||
@ -1024,8 +1024,8 @@ static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t coun
|
||||
/**
|
||||
* snd_rawmidi_transmit_empty - check whether the output buffer is empty
|
||||
* @substream: the rawmidi substream
|
||||
*
|
||||
* Returns 1 if the internal output buffer is empty, 0 if not.
|
||||
*
|
||||
* Return: 1 if the internal output buffer is empty, 0 if not.
|
||||
*/
|
||||
int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
|
||||
{
|
||||
@ -1055,7 +1055,7 @@ int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
|
||||
* and call snd_rawmidi_transmit_ack() after the transmission is
|
||||
* finished.
|
||||
*
|
||||
* Returns the size of copied data, or a negative error code on failure.
|
||||
* Return: The size of copied data, or a negative error code on failure.
|
||||
*/
|
||||
int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
|
||||
unsigned char *buffer, int count)
|
||||
@ -1107,7 +1107,7 @@ int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
|
||||
* the given size and updates the condition.
|
||||
* Call after the transmission is finished.
|
||||
*
|
||||
* Returns the advanced size if successful, or a negative error code on failure.
|
||||
* Return: The advanced size if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
|
||||
{
|
||||
@ -1140,7 +1140,7 @@ int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
|
||||
*
|
||||
* Copies data from the buffer to the device and advances the pointer.
|
||||
*
|
||||
* Returns the copied size if successful, or a negative error code on failure.
|
||||
* Return: The copied size if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
|
||||
unsigned char *buffer, int count)
|
||||
@ -1438,7 +1438,7 @@ static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
|
||||
* Creates a new rawmidi instance.
|
||||
* Use snd_rawmidi_set_ops() to set the operators to the new instance.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_rawmidi_new(struct snd_card *card, char *id, int device,
|
||||
int output_count, int input_count,
|
||||
|
||||
@ -102,6 +102,9 @@ static void snd_request_other(int minor)
|
||||
* This function increments the reference counter of the card instance
|
||||
* if an associated instance with the given minor number and type is found.
|
||||
* The caller must call snd_card_unref() appropriately later.
|
||||
*
|
||||
* Return: The user data pointer if the specified device is found. %NULL
|
||||
* otherwise.
|
||||
*/
|
||||
void *snd_lookup_minor_data(unsigned int minor, int type)
|
||||
{
|
||||
@ -261,7 +264,7 @@ static int snd_kernel_minor(int type, struct snd_card *card, int dev)
|
||||
* Registers an ALSA device file for the given card.
|
||||
* The operators have to be set in reg parameter.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_register_device_for_dev(int type, struct snd_card *card, int dev,
|
||||
const struct file_operations *f_ops,
|
||||
@ -339,7 +342,7 @@ static int find_snd_minor(int type, struct snd_card *card, int dev)
|
||||
* Unregisters the device file already registered via
|
||||
* snd_register_device().
|
||||
*
|
||||
* Returns zero if sucecessful, or a negative error code on failure
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_unregister_device(int type, struct snd_card *card, int dev)
|
||||
{
|
||||
|
||||
@ -362,8 +362,7 @@ static void master_free(struct snd_kcontrol *kcontrol)
|
||||
* @name: name string of the control element to create
|
||||
* @tlv: optional TLV int array for dB information
|
||||
*
|
||||
* Creates a virtual matster control with the given name string.
|
||||
* Returns the created control element, or NULL for errors (ENOMEM).
|
||||
* Creates a virtual master control with the given name string.
|
||||
*
|
||||
* After creating a vmaster element, you can add the slave controls
|
||||
* via snd_ctl_add_slave() or snd_ctl_add_slave_uncached().
|
||||
@ -372,6 +371,8 @@ static void master_free(struct snd_kcontrol *kcontrol)
|
||||
* for dB scale of the master control. It should be a single element
|
||||
* with #SNDRV_CTL_TLVT_DB_SCALE, #SNDRV_CTL_TLV_DB_MINMAX or
|
||||
* #SNDRV_CTL_TLVT_DB_MINMAX_MUTE type, and should be the max 0dB.
|
||||
*
|
||||
* Return: The created control element, or %NULL for errors (ENOMEM).
|
||||
*/
|
||||
struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
|
||||
const unsigned int *tlv)
|
||||
@ -423,6 +424,8 @@ EXPORT_SYMBOL(snd_ctl_make_virtual_master);
|
||||
*
|
||||
* Adds the given hook to the vmaster control element so that it's called
|
||||
* at each time when the value is changed.
|
||||
*
|
||||
* Return: Zero.
|
||||
*/
|
||||
int snd_ctl_add_vmaster_hook(struct snd_kcontrol *kcontrol,
|
||||
void (*hook)(void *private_data, int),
|
||||
|
||||
@ -129,6 +129,8 @@ static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu)
|
||||
* @dev_id: mpu401 instance
|
||||
*
|
||||
* Processes the interrupt for MPU401-UART i/o.
|
||||
*
|
||||
* Return: %IRQ_HANDLED if the interrupt was handled. %IRQ_NONE otherwise.
|
||||
*/
|
||||
irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id)
|
||||
{
|
||||
@ -148,6 +150,8 @@ EXPORT_SYMBOL(snd_mpu401_uart_interrupt);
|
||||
* @dev_id: mpu401 instance
|
||||
*
|
||||
* Processes the interrupt for MPU401-UART output.
|
||||
*
|
||||
* Return: %IRQ_HANDLED if the interrupt was handled. %IRQ_NONE otherwise.
|
||||
*/
|
||||
irqreturn_t snd_mpu401_uart_interrupt_tx(int irq, void *dev_id)
|
||||
{
|
||||
@ -519,7 +523,7 @@ static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi)
|
||||
* not the mpu401 instance itself. To access to the mpu401 instance,
|
||||
* cast from rawmidi->private_data (with struct snd_mpu401 magic-cast).
|
||||
*
|
||||
* Returns zero if successful, or a negative error code.
|
||||
* Return: Zero if successful, or a negative error code.
|
||||
*/
|
||||
int snd_mpu401_uart_new(struct snd_card *card, int device,
|
||||
unsigned short hardware,
|
||||
|
||||
@ -299,7 +299,7 @@ EXPORT_SYMBOL(snd_ac97_write);
|
||||
* Reads a value from the given register. This will invoke the read
|
||||
* callback directly after the register check.
|
||||
*
|
||||
* Returns the read value.
|
||||
* Return: The read value.
|
||||
*/
|
||||
unsigned short snd_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
|
||||
{
|
||||
@ -352,7 +352,7 @@ EXPORT_SYMBOL(snd_ac97_write_cache);
|
||||
* Compares the value with the register cache and updates the value
|
||||
* only when the value is changed.
|
||||
*
|
||||
* Returns 1 if the value is changed, 0 if no change, or a negative
|
||||
* Return: 1 if the value is changed, 0 if no change, or a negative
|
||||
* code on failure.
|
||||
*/
|
||||
int snd_ac97_update(struct snd_ac97 *ac97, unsigned short reg, unsigned short value)
|
||||
@ -384,7 +384,7 @@ EXPORT_SYMBOL(snd_ac97_update);
|
||||
* Updates the masked-bits on the given register only when the value
|
||||
* is changed.
|
||||
*
|
||||
* Returns 1 if the bits are changed, 0 if no change, or a negative
|
||||
* Return: 1 if the bits are changed, 0 if no change, or a negative
|
||||
* code on failure.
|
||||
*/
|
||||
int snd_ac97_update_bits(struct snd_ac97 *ac97, unsigned short reg, unsigned short mask, unsigned short value)
|
||||
@ -1836,7 +1836,7 @@ void snd_ac97_get_name(struct snd_ac97 *ac97, unsigned int id, char *name, int m
|
||||
* snd_ac97_get_short_name - retrieve codec name
|
||||
* @ac97: the codec instance
|
||||
*
|
||||
* Returns the short identifying name of the codec.
|
||||
* Return: The short identifying name of the codec.
|
||||
*/
|
||||
const char *snd_ac97_get_short_name(struct snd_ac97 *ac97)
|
||||
{
|
||||
@ -1910,7 +1910,7 @@ static int ac97_reset_wait(struct snd_ac97 *ac97, int timeout, int with_modem)
|
||||
* The AC97 bus instance is registered as a low-level device, so you don't
|
||||
* have to release it manually.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_ac97_bus(struct snd_card *card, int num, struct snd_ac97_bus_ops *ops,
|
||||
void *private_data, struct snd_ac97_bus **rbus)
|
||||
@ -2006,7 +2006,7 @@ static void do_update_power(struct work_struct *work)
|
||||
* The ac97 instance is registered as a low-level device, so you don't
|
||||
* have to release it manually.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_ac97_mixer(struct snd_ac97_bus *bus, struct snd_ac97_template *template, struct snd_ac97 **rac97)
|
||||
{
|
||||
@ -2373,6 +2373,8 @@ static struct ac97_power_reg power_regs[PWIDX_SIZE] = {
|
||||
* @powerup: non-zero when power up the part
|
||||
*
|
||||
* Update the AC97 powerdown register bits of the given part.
|
||||
*
|
||||
* Return: Zero.
|
||||
*/
|
||||
int snd_ac97_update_power(struct snd_ac97 *ac97, int reg, int powerup)
|
||||
{
|
||||
@ -2885,7 +2887,7 @@ static int apply_quirk_str(struct snd_ac97 *ac97, const char *typestr)
|
||||
* headphone (true line-out) control as "Master".
|
||||
* The quirk-list must be terminated with a zero-filled entry.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
|
||||
int snd_ac97_tune_hardware(struct snd_ac97 *ac97, struct ac97_quirk *quirk, const char *override)
|
||||
|
||||
@ -253,7 +253,7 @@ static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate)
|
||||
* AC97_SPDIF is accepted as a pseudo register to modify the SPDIF
|
||||
* status bits.
|
||||
*
|
||||
* Returns zero if successful, or a negative error code on failure.
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate)
|
||||
{
|
||||
@ -440,6 +440,8 @@ static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned
|
||||
* It assigns available AC97 slots for given PCMs. If none or only
|
||||
* some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members
|
||||
* are reduced and might be zero.
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_ac97_pcm_assign(struct snd_ac97_bus *bus,
|
||||
unsigned short pcms_count,
|
||||
@ -562,6 +564,8 @@ EXPORT_SYMBOL(snd_ac97_pcm_assign);
|
||||
* @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm
|
||||
*
|
||||
* It locks the specified slots and sets the given rate to AC97 registers.
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate,
|
||||
enum ac97_pcm_cfg cfg, unsigned short slots)
|
||||
@ -644,6 +648,8 @@ EXPORT_SYMBOL(snd_ac97_pcm_open);
|
||||
* @pcm: the ac97 pcm instance
|
||||
*
|
||||
* It frees the locked AC97 slots.
|
||||
*
|
||||
* Return: Zero.
|
||||
*/
|
||||
int snd_ac97_pcm_close(struct ac97_pcm *pcm)
|
||||
{
|
||||
@ -718,6 +724,8 @@ static int double_rate_hw_constraint_channels(struct snd_pcm_hw_params *params,
|
||||
*
|
||||
* Installs the hardware constraint rules to prevent using double rates and
|
||||
* more than two channels at the same time.
|
||||
*
|
||||
* Return: Zero if successful, or a negative error code on failure.
|
||||
*/
|
||||
int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime)
|
||||
{
|
||||
|
||||
@ -352,7 +352,9 @@ static struct sound_unit *chains[SOUND_STEP];
|
||||
* @dev: device pointer
|
||||
*
|
||||
* Allocate a special sound device by minor number from the sound
|
||||
* subsystem. The allocated number is returned on success. On failure
|
||||
* subsystem.
|
||||
*
|
||||
* Return: The allocated number is returned on success. On failure,
|
||||
* a negative error code is returned.
|
||||
*/
|
||||
|
||||
@ -436,8 +438,10 @@ EXPORT_SYMBOL(register_sound_special);
|
||||
* @dev: Unit number to allocate
|
||||
*
|
||||
* Allocate a mixer device. Unit is the number of the mixer requested.
|
||||
* Pass -1 to request the next free mixer unit. On success the allocated
|
||||
* number is returned, on failure a negative error code is returned.
|
||||
* Pass -1 to request the next free mixer unit.
|
||||
*
|
||||
* Return: On success, the allocated number is returned. On failure,
|
||||
* a negative error code is returned.
|
||||
*/
|
||||
|
||||
int register_sound_mixer(const struct file_operations *fops, int dev)
|
||||
@ -454,8 +458,10 @@ EXPORT_SYMBOL(register_sound_mixer);
|
||||
* @dev: Unit number to allocate
|
||||
*
|
||||
* Allocate a midi device. Unit is the number of the midi device requested.
|
||||
* Pass -1 to request the next free midi unit. On success the allocated
|
||||
* number is returned, on failure a negative error code is returned.
|
||||
* Pass -1 to request the next free midi unit.
|
||||
*
|
||||
* Return: On success, the allocated number is returned. On failure,
|
||||
* a negative error code is returned.
|
||||
*/
|
||||
|
||||
int register_sound_midi(const struct file_operations *fops, int dev)
|
||||
@ -477,11 +483,13 @@ EXPORT_SYMBOL(register_sound_midi);
|
||||
* @dev: Unit number to allocate
|
||||
*
|
||||
* Allocate a DSP device. Unit is the number of the DSP requested.
|
||||
* Pass -1 to request the next free DSP unit. On success the allocated
|
||||
* number is returned, on failure a negative error code is returned.
|
||||
* Pass -1 to request the next free DSP unit.
|
||||
*
|
||||
* This function allocates both the audio and dsp device entries together
|
||||
* and will always allocate them as a matching pair - eg dsp3/audio3
|
||||
*
|
||||
* Return: On success, the allocated number is returned. On failure,
|
||||
* a negative error code is returned.
|
||||
*/
|
||||
|
||||
int register_sound_dsp(const struct file_operations *fops, int dev)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user