sound/firewire/oxfw/oxfw.h

Source file repositories/reference/linux-study-clean/sound/firewire/oxfw/oxfw.h

File Facts

System
Linux kernel
Corpus path
sound/firewire/oxfw/oxfw.h
Extension
.h
Size
5688 bytes
Lines
167
Domain
Driver Families
Bucket
sound/firewire
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct snd_oxfw {
	struct snd_card *card;
	struct fw_unit *unit;
	struct mutex mutex;
	spinlock_t lock;

	// The combination of snd_oxfw_quirk enumeration-constants.
	unsigned int quirks;
	bool has_output;
	bool has_input;
	u8 *tx_stream_formats[SND_OXFW_STREAM_FORMAT_ENTRIES];
	u8 *rx_stream_formats[SND_OXFW_STREAM_FORMAT_ENTRIES];
	bool assumed;
	struct cmp_connection out_conn;
	struct cmp_connection in_conn;
	struct amdtp_stream tx_stream;
	struct amdtp_stream rx_stream;
	unsigned int substreams_count;

	unsigned int midi_input_ports;
	unsigned int midi_output_ports;

	int dev_lock_count;
	bool dev_lock_changed;
	wait_queue_head_t hwdep_wait;

	void *spec;

	struct amdtp_domain domain;
};

/*
 * AV/C Stream Format Information Specification 1.1 Working Draft
 * (Apr 2005, 1394TA)
 */
int avc_stream_set_format(struct fw_unit *unit, enum avc_general_plug_dir dir,
			  unsigned int pid, u8 *format, unsigned int len);
int avc_stream_get_format(struct fw_unit *unit,
			  enum avc_general_plug_dir dir, unsigned int pid,
			  u8 *buf, unsigned int *len, unsigned int eid);
static inline int
avc_stream_get_format_single(struct fw_unit *unit,
			     enum avc_general_plug_dir dir, unsigned int pid,
			     u8 *buf, unsigned int *len)
{
	return avc_stream_get_format(unit, dir, pid, buf, len, 0xff);
}
static inline int
avc_stream_get_format_list(struct fw_unit *unit,
			   enum avc_general_plug_dir dir, unsigned int pid,
			   u8 *buf, unsigned int *len,
			   unsigned int eid)
{
	return avc_stream_get_format(unit, dir, pid, buf, len, eid);
}

/*
 * AV/C Digital Interface Command Set General Specification 4.2
 * (Sep 2004, 1394TA)
 */
int avc_general_inquiry_sig_fmt(struct fw_unit *unit, unsigned int rate,
				enum avc_general_plug_dir dir,
				unsigned short pid);

int snd_oxfw_stream_init_duplex(struct snd_oxfw *oxfw);
int snd_oxfw_stream_reserve_duplex(struct snd_oxfw *oxfw,
				   struct amdtp_stream *stream,
				   unsigned int rate, unsigned int pcm_channels,
				   unsigned int frames_per_period,
				   unsigned int frames_per_buffer);
int snd_oxfw_stream_start_duplex(struct snd_oxfw *oxfw);
void snd_oxfw_stream_stop_duplex(struct snd_oxfw *oxfw);
void snd_oxfw_stream_destroy_duplex(struct snd_oxfw *oxfw);
void snd_oxfw_stream_update_duplex(struct snd_oxfw *oxfw);

struct snd_oxfw_stream_formation {
	unsigned int rate;
	unsigned int pcm;
	unsigned int midi;
};
int snd_oxfw_stream_parse_format(const u8 *format,
				 struct snd_oxfw_stream_formation *formation);
int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw,
				enum avc_general_plug_dir dir,
				struct snd_oxfw_stream_formation *formation);

int snd_oxfw_stream_discover(struct snd_oxfw *oxfw);

void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw);
int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw);

Annotation

Implementation Notes