sound/pci/pcxhr/pcxhr.h

Source file repositories/reference/linux-study-clean/sound/pci/pcxhr/pcxhr.h

File Facts

System
Linux kernel
Corpus path
sound/pci/pcxhr/pcxhr.h
Extension
.h
Size
6344 bytes
Lines
202
Domain
Driver Families
Bucket
sound/pci
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 pcxhr_mgr {
	unsigned int num_cards;
	struct snd_pcxhr *chip[PCXHR_MAX_CARDS];

	struct pci_dev *pci;

	int irq;

	int granularity;

	/* card access with 1 mem bar and 2 io bar's */
	unsigned long port[3];

	/* share the name */
	char name[40];			/* name of this soundcard */

	struct pcxhr_rmh *prmh;

	struct mutex lock;		/* interrupt lock */
	struct mutex msg_lock;		/* message lock */

	struct mutex setup_mutex;	/* mutex used in hw_params, open and close */
	struct mutex mixer_mutex;	/* mutex for mixer */

	/* hardware interface */
	unsigned int dsp_loaded;	/* bit flags of loaded dsp indices */
	unsigned int dsp_version;	/* read from embedded once firmware is loaded */
	int playback_chips;
	int capture_chips;
	int fw_file_set;
	int firmware_num;
	unsigned int is_hr_stereo:1;
	unsigned int board_has_aes1:1;	/* if 1 board has AES1 plug and SRC */
	unsigned int board_has_analog:1; /* if 0 the board is digital only */
	unsigned int board_has_mic:1; /* if 1 the board has microphone input */
	unsigned int board_aes_in_192k:1;/* if 1 the aes input plugs do support 192kHz */
	unsigned int mono_capture:1; /* if 1 the board does mono capture */
	unsigned int capture_ltc:1; /* if 1 the board captures LTC input */

	struct snd_dma_buffer hostport;

	enum pcxhr_clock_type use_clock_type;	/* clock type selected by mixer */
	enum pcxhr_clock_type cur_clock_type;	/* current clock type synced */
	int sample_rate;
	int ref_count_rate;
	int timer_toggle;		/* timer interrupt toggles between the two values 0x200 and 0x300 */
	int dsp_time_last;		/* the last dsp time (read by interrupt) */
	int dsp_time_err;		/* dsp time errors */
	unsigned int src_it_dsp;	/* dsp interrupt source */
	unsigned int io_num_reg_cont;	/* backup of IO_NUM_REG_CONT */
	unsigned int codec_speed;	/* speed mode of the codecs */
	unsigned int sample_rate_real;	/* current real sample rate */
	int last_reg_stat;
	int async_err_stream_xrun;
	int async_err_pipe_xrun;
	int async_err_other_last;

	unsigned char xlx_cfg;		/* copy of PCXHR_XLX_CFG register */
	unsigned char xlx_selmic;	/* copy of PCXHR_XLX_SELMIC register */
	unsigned char dsp_reset;	/* copy of PCXHR_DSP_RESET register */
};


enum pcxhr_stream_status {
	PCXHR_STREAM_STATUS_FREE,
	PCXHR_STREAM_STATUS_OPEN,
	PCXHR_STREAM_STATUS_SCHEDULE_RUN,
	PCXHR_STREAM_STATUS_STARTED,
	PCXHR_STREAM_STATUS_RUNNING,
	PCXHR_STREAM_STATUS_SCHEDULE_STOP,
	PCXHR_STREAM_STATUS_STOPPED,
	PCXHR_STREAM_STATUS_PAUSED
};

struct pcxhr_stream {
	struct snd_pcm_substream *substream;
	snd_pcm_format_t format;
	struct pcxhr_pipe *pipe;

	enum pcxhr_stream_status status;	/* free, open, running, draining, pause */

	u_int64_t timer_abs_periods;	/* timer: samples elapsed since TRIGGER_START (multiple of period_size) */
	u_int32_t timer_period_frag;	/* timer: samples elapsed since last call to snd_pcm_period_elapsed (0..period_size) */
	u_int32_t timer_buf_periods;	/* nb of periods in the buffer that have already elapsed */
	int timer_is_synced;		/* if(0) : timer needs to be resynced with real hardware pointer */

	int channels;
};

Annotation

Implementation Notes