sound/ppc/awacs.h

Source file repositories/reference/linux-study-clean/sound/ppc/awacs.h

File Facts

System
Linux kernel
Corpus path
sound/ppc/awacs.h
Extension
.h
Size
7503 bytes
Lines
193
Domain
Driver Families
Bucket
sound/ppc
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 awacs_regs {
    unsigned	control;	/* Audio control register */
    unsigned	pad0[3];
    unsigned	codec_ctrl;	/* Codec control register */
    unsigned	pad1[3];
    unsigned	codec_stat;	/* Codec status register */
    unsigned	pad2[3];
    unsigned	clip_count;	/* Clipping count register */
    unsigned	pad3[3];
    unsigned	byteswap;	/* Data is little-endian if 1 */
};

/*******************/
/* Audio Bit Masks */
/*******************/

/* Audio Control Reg Bit Masks */
/* ----- ------- --- --- ----- */
#define MASK_ISFSEL	(0xf)		/* Input SubFrame Select */
#define MASK_OSFSEL	(0xf << 4)	/* Output SubFrame Select */
#define MASK_RATE	(0x7 << 8)	/* Sound Rate */
#define MASK_CNTLERR	(0x1 << 11)	/* Error */
#define MASK_PORTCHG	(0x1 << 12)	/* Port Change */
#define MASK_IEE	(0x1 << 13)	/* Enable Interrupt on Error */
#define MASK_IEPC	(0x1 << 14)	/* Enable Interrupt on Port Change */
#define MASK_SSFSEL	(0x3 << 15)	/* Status SubFrame Select */

/* Audio Codec Control Reg Bit Masks */
/* ----- ----- ------- --- --- ----- */
#define MASK_NEWECMD	(0x1 << 24)	/* Lock: don't write to reg when 1 */
#define MASK_EMODESEL	(0x3 << 22)	/* Send info out on which frame? */
#define MASK_EXMODEADDR	(0x3ff << 12)	/* Extended Mode Address -- 10 bits */
#define MASK_EXMODEDATA	(0xfff)		/* Extended Mode Data -- 12 bits */

/* Audio Codec Control Address Values / Masks */
/* ----- ----- ------- ------- ------ - ----- */
#define MASK_ADDR0	(0x0 << 12)	/* Expanded Data Mode Address 0 */
#define MASK_ADDR_MUX	MASK_ADDR0	/* Mux Control */
#define MASK_ADDR_GAIN	MASK_ADDR0

#define MASK_ADDR1	(0x1 << 12)	/* Expanded Data Mode Address 1 */
#define MASK_ADDR_MUTE	MASK_ADDR1
#define MASK_ADDR_RATE	MASK_ADDR1

#define MASK_ADDR2	(0x2 << 12)	/* Expanded Data Mode Address 2 */
#define MASK_ADDR_VOLA	MASK_ADDR2	/* Volume Control A -- Headphones */
#define MASK_ADDR_VOLHD MASK_ADDR2

#define MASK_ADDR4	(0x4 << 12)	/* Expanded Data Mode Address 4 */
#define MASK_ADDR_VOLC	MASK_ADDR4	/* Volume Control C -- Speaker */
#define MASK_ADDR_VOLSPK MASK_ADDR4

/* additional registers of screamer */
#define MASK_ADDR5	(0x5 << 12)	/* Expanded Data Mode Address 5 */
#define MASK_ADDR6	(0x6 << 12)	/* Expanded Data Mode Address 6 */
#define MASK_ADDR7	(0x7 << 12)	/* Expanded Data Mode Address 7 */

/* Address 0 Bit Masks & Macros */
/* ------- - --- ----- - ------ */
#define MASK_GAINRIGHT	(0xf)		/* Gain Right Mask */
#define MASK_GAINLEFT	(0xf << 4)	/* Gain Left Mask */
#define MASK_GAINLINE	(0x1 << 8)	/* Disable Mic preamp */
#define MASK_GAINMIC	(0x0 << 8)	/* Enable Mic preamp */
#define MASK_MUX_CD	(0x1 << 9)	/* Select CD in MUX */
#define MASK_MUX_MIC	(0x1 << 10)	/* Select Mic in MUX */
#define MASK_MUX_AUDIN	(0x1 << 11)	/* Select Audio In in MUX */
#define MASK_MUX_LINE	MASK_MUX_AUDIN
#define SHIFT_GAINLINE	8
#define SHIFT_MUX_CD	9
#define SHIFT_MUX_MIC	10
#define SHIFT_MUX_LINE	11

#define GAINRIGHT(x)	((x) & MASK_GAINRIGHT)
#define GAINLEFT(x)	(((x) << 4) & MASK_GAINLEFT)

/* Address 1 Bit Masks */
/* ------- - --- ----- */
#define MASK_ADDR1RES1	(0x3)		/* Reserved */
#define MASK_RECALIBRATE (0x1 << 2)	/* Recalibrate */
#define MASK_SAMPLERATE	(0x7 << 3)	/* Sample Rate: */
#define MASK_LOOPTHRU	(0x1 << 6)	/* Loopthrough Enable */
#define SHIFT_LOOPTHRU	6
#define MASK_CMUTE	(0x1 << 7)	/* Output C (Speaker) Mute when 1 */
#define MASK_SPKMUTE	MASK_CMUTE
#define SHIFT_SPKMUTE	7
#define MASK_ADDR1RES2	(0x1 << 8)	/* Reserved */
#define MASK_AMUTE	(0x1 << 9)	/* Output A (Headphone) Mute when 1 */
#define MASK_HDMUTE	MASK_AMUTE
#define SHIFT_HDMUTE	9
#define MASK_PAROUT	(0x3 << 10)	/* Parallel Out (???) */

Annotation

Implementation Notes