sound/soc/pxa/pxa2xx-lib.h

File Facts

System

Linux kernel

Corpus path

sound/soc/pxa/pxa2xx-lib.h

Extension

.h

Size

1545 bytes

Lines

46

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.

• 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• uapi/sound/asound.h
• linux/platform_device.h

Detected Declarations

• struct snd_pcm_substream
• struct snd_pcm_hw_params
• struct snd_soc_pcm_runtime
• struct snd_pcm
• struct snd_soc_component

Annotated Snippet

#ifndef __PXA2XX_LIB_H
#define __PXA2XX_LIB_H

#include <uapi/sound/asound.h>
#include <linux/platform_device.h>

/* PCM */
struct snd_pcm_substream;
struct snd_pcm_hw_params;
struct snd_soc_pcm_runtime;
struct snd_pcm;
struct snd_soc_component;

int pxa2xx_soc_pcm_new(struct snd_soc_component *component,
		       struct snd_soc_pcm_runtime *rtd);
int pxa2xx_soc_pcm_open(struct snd_soc_component *component,
		        struct snd_pcm_substream *substream);
int pxa2xx_soc_pcm_close(struct snd_soc_component *component,
			 struct snd_pcm_substream *substream);
int pxa2xx_soc_pcm_hw_params(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params);
int pxa2xx_soc_pcm_prepare(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream);
int pxa2xx_soc_pcm_trigger(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream, int cmd);
snd_pcm_uframes_t pxa2xx_soc_pcm_pointer(struct snd_soc_component *component,
					 struct snd_pcm_substream *substream);

/* AC97 */
int pxa2xx_ac97_read(int slot, unsigned short reg);
int pxa2xx_ac97_write(int slot, unsigned short reg, unsigned short val);

bool pxa2xx_ac97_try_warm_reset(void);
bool pxa2xx_ac97_try_cold_reset(void);
void pxa2xx_ac97_finish_reset(void);

int pxa2xx_ac97_hw_suspend(void);
int pxa2xx_ac97_hw_resume(void);

int pxa2xx_ac97_hw_probe(struct platform_device *dev);
void pxa2xx_ac97_hw_remove(struct platform_device *dev);

#endif

Annotation

• Immediate include surface: `uapi/sound/asound.h`, `linux/platform_device.h`.
• Detected declarations: `struct snd_pcm_substream`, `struct snd_pcm_hw_params`, `struct snd_soc_pcm_runtime`, `struct snd_pcm`, `struct snd_soc_component`.
• Atlas domain: Driver Families / sound/soc.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.