sound/soc/bcm/cygnus-ssp.h

Source file repositories/reference/linux-study-clean/sound/soc/bcm/cygnus-ssp.h

File Facts

System
Linux kernel
Corpus path
sound/soc/bcm/cygnus-ssp.h
Extension
.h
Size
2998 bytes
Lines
128
Domain
Driver Families
Bucket
sound/soc
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 ringbuf_regs {
	unsigned rdaddr;
	unsigned wraddr;
	unsigned baseaddr;
	unsigned endaddr;
	unsigned fmark;   /* freemark for play, fullmark for caputure */
	unsigned period_bytes;
	unsigned buf_size;
};

#define RINGBUF_REG_PLAYBACK(num) ((struct ringbuf_regs) { \
	.rdaddr = SRC_RBUF_ ##num## _RDADDR_OFFSET, \
	.wraddr = SRC_RBUF_ ##num## _WRADDR_OFFSET, \
	.baseaddr = SRC_RBUF_ ##num## _BASEADDR_OFFSET, \
	.endaddr = SRC_RBUF_ ##num## _ENDADDR_OFFSET, \
	.fmark = SRC_RBUF_ ##num## _FREE_MARK_OFFSET, \
	.period_bytes = 0, \
	.buf_size = 0, \
})

#define RINGBUF_REG_CAPTURE(num) ((struct ringbuf_regs)  { \
	.rdaddr = DST_RBUF_ ##num## _RDADDR_OFFSET, \
	.wraddr = DST_RBUF_ ##num## _WRADDR_OFFSET, \
	.baseaddr = DST_RBUF_ ##num## _BASEADDR_OFFSET, \
	.endaddr = DST_RBUF_ ##num## _ENDADDR_OFFSET, \
	.fmark = DST_RBUF_ ##num## _FULL_MARK_OFFSET, \
	.period_bytes = 0, \
	.buf_size = 0, \
})

enum cygnus_audio_port_type {
	PORT_TDM,
	PORT_SPDIF,
};

struct cygnus_ssp_regs {
	u32 i2s_stream_cfg;
	u32 i2s_cfg;
	u32 i2s_cap_stream_cfg;
	u32 i2s_cap_cfg;
	u32 i2s_mclk_cfg;

	u32 bf_destch_ctrl;
	u32 bf_destch_cfg;
	u32 bf_sourcech_ctrl;
	u32 bf_sourcech_cfg;
	u32 bf_sourcech_grp;
};

struct cygnus_track_clk {
	bool cap_en;
	bool play_en;
	bool cap_clk_en;
	bool play_clk_en;
};

struct cygnus_aio_port {
	int portnum;
	int mode;
	bool is_slave;
	int streams_on;   /* will be 0 if both capture and play are off */
	int fsync_width;
	int port_type;

	u32 mclk;
	u32 lrclk;
	u32 bit_per_frame;
	u32 pll_clk_num;

	struct cygnus_audio *cygaud;
	struct cygnus_ssp_regs regs;

	struct ringbuf_regs play_rb_regs;
	struct ringbuf_regs capture_rb_regs;

	struct snd_pcm_substream *play_stream;
	struct snd_pcm_substream *capture_stream;

	struct cygnus_track_clk clk_trace;
};


struct cygnus_audio {
	struct cygnus_aio_port  portinfo[CYGNUS_MAX_PORTS];

	int irq_num;
	void __iomem *audio;
	struct device *dev;
	void __iomem *i2s_in;

Annotation

Implementation Notes