hda_codec.h

linux 内核源代码

/* Jack location (0x0-0x3f) */
/* common case */
enum {
	AC_JACK_LOC_NONE,
	AC_JACK_LOC_REAR,
	AC_JACK_LOC_FRONT,
	AC_JACK_LOC_LEFT,
	AC_JACK_LOC_RIGHT,
	AC_JACK_LOC_TOP,
	AC_JACK_LOC_BOTTOM,
};
/* bits 4-5 */
enum {
	AC_JACK_LOC_EXTERNAL = 0x00,
	AC_JACK_LOC_INTERNAL = 0x10,
	AC_JACK_LOC_SEPARATE = 0x20,
	AC_JACK_LOC_OTHER    = 0x30,
};
enum {
	/* external on primary chasis */
	AC_JACK_LOC_REAR_PANEL = 0x07,
	AC_JACK_LOC_DRIVE_BAY,
	/* internal */
	AC_JACK_LOC_RISER = 0x17,
	AC_JACK_LOC_HDMI,
	AC_JACK_LOC_ATAPI,
	/* others */
	AC_JACK_LOC_MOBILE_IN = 0x37,
	AC_JACK_LOC_MOBILE_OUT,
};

/* Port connectivity (0-3) */
enum {
	AC_JACK_PORT_COMPLEX,
	AC_JACK_PORT_NONE,
	AC_JACK_PORT_FIXED,
	AC_JACK_PORT_BOTH,
};

/* max. connections to a widget */
#define HDA_MAX_CONNECTIONS	32

/* max. codec address */
#define HDA_MAX_CODEC_ADDRESS	0x0f

/*
 * Structures
 */

struct hda_bus;
struct hda_codec;
struct hda_pcm;
struct hda_pcm_stream;
struct hda_bus_unsolicited;

/* NID type */
typedef u16 hda_nid_t;

/* bus operators */
struct hda_bus_ops {
	/* send a single command */
	int (*command)(struct hda_codec *codec, hda_nid_t nid, int direct,
		       unsigned int verb, unsigned int parm);
	/* get a response from the last command */
	unsigned int (*get_response)(struct hda_codec *codec);
	/* free the private data */
	void (*private_free)(struct hda_bus *);
#ifdef CONFIG_SND_HDA_POWER_SAVE
	/* notify power-up/down from codec to contoller */
	void (*pm_notify)(struct hda_codec *codec);
#endif
};

/* template to pass to the bus constructor */
struct hda_bus_template {
	void *private_data;
	struct pci_dev *pci;
	const char *modelname;
	struct hda_bus_ops ops;
};

/*
 * codec bus
 *
 * each controller needs to creata a hda_bus to assign the accessor.
 * A hda_bus contains several codecs in the list codec_list.
 */
struct hda_bus {
	struct snd_card *card;

	/* copied from template */
	void *private_data;
	struct pci_dev *pci;
	const char *modelname;
	struct hda_bus_ops ops;

	/* codec linked list */
	struct list_head codec_list;
	/* link caddr -> codec */
	struct hda_codec *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];

	struct mutex cmd_mutex;

	/* unsolicited event queue */
	struct hda_bus_unsolicited *unsol;

	struct snd_info_entry *proc;
};

/*
 * codec preset
 *
 * Known codecs have the patch to build and set up the controls/PCMs
 * better than the generic parser.
 */
struct hda_codec_preset {
	unsigned int id;
	unsigned int mask;
	unsigned int subs;
	unsigned int subs_mask;
	unsigned int rev;
	const char *name;
	int (*patch)(struct hda_codec *codec);
};
	
/* ops set by the preset patch */
struct hda_codec_ops {
	int (*build_controls)(struct hda_codec *codec);
	int (*build_pcms)(struct hda_codec *codec);
	int (*init)(struct hda_codec *codec);
	void (*free)(struct hda_codec *codec);
	void (*unsol_event)(struct hda_codec *codec, unsigned int res);
#ifdef SND_HDA_NEEDS_RESUME
	int (*suspend)(struct hda_codec *codec, pm_message_t state);
	int (*resume)(struct hda_codec *codec);
#endif
#ifdef CONFIG_SND_HDA_POWER_SAVE
	int (*check_power_status)(struct hda_codec *codec, hda_nid_t nid);
#endif
};

/* record for amp information cache */
struct hda_cache_head {
	u32 key;		/* hash key */
	u16 val;		/* assigned value */
	u16 next;		/* next link; -1 = terminal */
};

struct hda_amp_info {
	struct hda_cache_head head;
	u32 amp_caps;		/* amp capabilities */
	u16 vol[2];		/* current volume & mute */
};

struct hda_cache_rec {
	u16 hash[64];			/* hash table for index */
	unsigned int num_entries;	/* number of assigned entries */
	unsigned int size;		/* allocated size */
	unsigned int record_size;	/* record size (including header) */
	void *buffer;			/* hash table entries */
};

/* PCM callbacks */
struct hda_pcm_ops {
	int (*open)(struct hda_pcm_stream *info, struct hda_codec *codec,
		    struct snd_pcm_substream *substream);
	int (*close)(struct hda_pcm_stream *info, struct hda_codec *codec,
		     struct snd_pcm_substream *substream);
	int (*prepare)(struct hda_pcm_stream *info, struct hda_codec *codec,
		       unsigned int stream_tag, unsigned int format,
		       struct snd_pcm_substream *substream);
	int (*cleanup)(struct hda_pcm_stream *info, struct hda_codec *codec,
		       struct snd_pcm_substream *substream);
};

/* PCM information for each substream */
struct hda_pcm_stream {
	unsigned int substreams;	/* number of substreams, 0 = not exist*/
	unsigned int channels_min;	/* min. number of channels */
	unsigned int channels_max;	/* max. number of channels */
	hda_nid_t nid;	/* default NID to query rates/formats/bps, or set up */
	u32 rates;	/* supported rates */
	u64 formats;	/* supported formats (SNDRV_PCM_FMTBIT_) */
	unsigned int maxbps;	/* supported max. bit per sample */
	struct hda_pcm_ops ops;
};

/* for PCM creation */
struct hda_pcm {
	char *name;
	struct hda_pcm_stream stream[2];
	unsigned int is_modem;	/* modem codec? */
};

/* codec information */
struct hda_codec {
	struct hda_bus *bus;
	unsigned int addr;	/* codec addr*/
	struct list_head list;	/* list point */

	hda_nid_t afg;	/* AFG node id */
	hda_nid_t mfg;	/* MFG node id */

	/* ids */
	u32 vendor_id;
	u32 subsystem_id;
	u32 revision_id;

	/* detected preset */
	const struct hda_codec_preset *preset;

	/* set by patch */
	struct hda_codec_ops patch_ops;

	/* PCM to create, set by patch_ops.build_pcms callback */
	unsigned int num_pcms;
	struct hda_pcm *pcm_info;

	/* codec specific info */
	void *spec;

	/* widget capabilities cache */
	unsigned int num_nodes;
	hda_nid_t start_nid;
	u32 *wcaps;

	struct hda_cache_rec amp_cache;	/* cache for amp access */
	struct hda_cache_rec cmd_cache;	/* cache for other commands */

	struct mutex spdif_mutex;
	unsigned int spdif_status;	/* IEC958 status bits */
	unsigned short spdif_ctls;	/* SPDIF control bits */
	unsigned int spdif_in_enable;	/* SPDIF input enable? */

	struct snd_hwdep *hwdep;	/* assigned hwdep device */

#ifdef CONFIG_SND_HDA_POWER_SAVE
	unsigned int power_on :1;	/* current (global) power-state */
	unsigned int power_transition :1; /* power-state in transition */
	int power_count;	/* current (global) power refcount */
	struct delayed_work power_work; /* delayed task for powerdown */
#endif
};

/* direction */
enum {
	HDA_INPUT, HDA_OUTPUT
};


/*
 * constructors
 */
int snd_hda_bus_new(struct snd_card *card, const struct hda_bus_template *temp,
		    struct hda_bus **busp);
int snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
		      struct hda_codec **codecp);

/*
 * low level functions
 */
unsigned int snd_hda_codec_read(struct hda_codec *codec, hda_nid_t nid,
				int direct,
				unsigned int verb, unsigned int parm);
int snd_hda_codec_write(struct hda_codec *codec, hda_nid_t nid, int direct,
			unsigned int verb, unsigned int parm);
#define snd_hda_param_read(codec, nid, param) \
	snd_hda_codec_read(codec, nid, 0, AC_VERB_PARAMETERS, param)
int snd_hda_get_sub_nodes(struct hda_codec *codec, hda_nid_t nid,
			  hda_nid_t *start_id);
int snd_hda_get_connections(struct hda_codec *codec, hda_nid_t nid,
			    hda_nid_t *conn_list, int max_conns);

struct hda_verb {
	hda_nid_t nid;
	u32 verb;
	u32 param;
};

void snd_hda_sequence_write(struct hda_codec *codec,
			    const struct hda_verb *seq);

/* unsolicited event */
int snd_hda_queue_unsol_event(struct hda_bus *bus, u32 res, u32 res_ex);

/* cached write */
#ifdef SND_HDA_NEEDS_RESUME
int snd_hda_codec_write_cache(struct hda_codec *codec, hda_nid_t nid,
			      int direct, unsigned int verb, unsigned int parm);
void snd_hda_sequence_write_cache(struct hda_codec *codec,
				  const struct hda_verb *seq);
void snd_hda_codec_resume_cache(struct hda_codec *codec);
#else
#define snd_hda_codec_write_cache	snd_hda_codec_write
#define snd_hda_sequence_write_cache	snd_hda_sequence_write
#endif

/*
 * Mixer
 */
int snd_hda_build_controls(struct hda_bus *bus);

/*
 * PCM
 */
int snd_hda_build_pcms(struct hda_bus *bus);
void snd_hda_codec_setup_stream(struct hda_codec *codec, hda_nid_t nid,
				u32 stream_tag,
				int channel_id, int format);
unsigned int snd_hda_calc_stream_format(unsigned int rate,
					unsigned int channels,
					unsigned int format,
					unsigned int maxbps);
int snd_hda_query_supported_pcm(struct hda_codec *codec, hda_nid_t nid,
				u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
int snd_hda_is_supported_format(struct hda_codec *codec, hda_nid_t nid,
				unsigned int format);

/*
 * Misc
 */
void snd_hda_get_codec_name(struct hda_codec *codec, char *name, int namelen);

/*
 * power management
 */
#ifdef CONFIG_PM
int snd_hda_suspend(struct hda_bus *bus, pm_message_t state);
int snd_hda_resume(struct hda_bus *bus);
#endif

/*
 * power saving
 */
#ifdef CONFIG_SND_HDA_POWER_SAVE
void snd_hda_power_up(struct hda_codec *codec);
void snd_hda_power_down(struct hda_codec *codec);
#define snd_hda_codec_needs_resume(codec) codec->power_count
int snd_hda_codecs_inuse(struct hda_bus *bus);
#else
static inline void snd_hda_power_up(struct hda_codec *codec) {}
static inline void snd_hda_power_down(struct hda_codec *codec) {}
#define snd_hda_codec_needs_resume(codec) 1
#define snd_hda_codecs_inuse(bus) 1
#endif

#endif /* __SOUND_HDA_CODEC_H */