sound/pci/ctxfi/cthw20k2.c

Source file repositories/reference/linux-study-clean/sound/pci/ctxfi/cthw20k2.c

File Facts

System
Linux kernel
Corpus path
sound/pci/ctxfi/cthw20k2.c
Extension
.c
Size
53719 bytes
Lines
2390
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 hw20k2 {
	struct hw hw;
	/* for i2c */
	unsigned char dev_id;
	unsigned char addr_size;
	unsigned char data_size;

	int mic_source;
};

static u32 hw_read_20kx(struct hw *hw, u32 reg);
static void hw_write_20kx(struct hw *hw, u32 reg, u32 data);

/*
 * Type definition block.
 * The layout of control structures can be directly applied on 20k2 chip.
 */

/*
 * SRC control block definitions.
 */

/* SRC resource control block */
#define SRCCTL_STATE	0x00000007
#define SRCCTL_BM	0x00000008
#define SRCCTL_RSR	0x00000030
#define SRCCTL_SF	0x000001C0
#define SRCCTL_WR	0x00000200
#define SRCCTL_PM	0x00000400
#define SRCCTL_ROM	0x00001800
#define SRCCTL_VO	0x00002000
#define SRCCTL_ST	0x00004000
#define SRCCTL_IE	0x00008000
#define SRCCTL_ILSZ	0x000F0000
#define SRCCTL_BP	0x00100000

#define SRCCCR_CISZ	0x000007FF
#define SRCCCR_CWA	0x001FF800
#define SRCCCR_D	0x00200000
#define SRCCCR_RS	0x01C00000
#define SRCCCR_NAL	0x3E000000
#define SRCCCR_RA	0xC0000000

#define SRCCA_CA	0x0FFFFFFF
#define SRCCA_RS	0xE0000000

#define SRCSA_SA	0x0FFFFFFF

#define SRCLA_LA	0x0FFFFFFF

/* Mixer Parameter Ring ram Low and Hight register.
 * Fixed-point value in 8.24 format for parameter channel */
#define MPRLH_PITCH	0xFFFFFFFF

/* SRC resource register dirty flags */
union src_dirty {
	struct {
		u16 ctl:1;
		u16 ccr:1;
		u16 sa:1;
		u16 la:1;
		u16 ca:1;
		u16 mpr:1;
		u16 czbfs:1;	/* Clear Z-Buffers */
		u16 rsv:9;
	} bf;
	u16 data;
};

struct src_rsc_ctrl_blk {
	unsigned int	ctl;
	unsigned int 	ccr;
	unsigned int	ca;
	unsigned int	sa;
	unsigned int	la;
	unsigned int	mpr;
	union src_dirty	dirty;
};

/* SRC manager control block */
union src_mgr_dirty {
	struct {
		u16 enb0:1;
		u16 enb1:1;
		u16 enb2:1;
		u16 enb3:1;
		u16 enb4:1;
		u16 enb5:1;
		u16 enb6:1;
		u16 enb7:1;

Annotation

Implementation Notes