sound/ppc/snd_ps3.h

Source file repositories/reference/linux-study-clean/sound/ppc/snd_ps3.h

File Facts

System
Linux kernel
Corpus path
sound/ppc/snd_ps3.h
Extension
.h
Size
2976 bytes
Lines
125
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 snd_ps3_avsetting_info {
	uint32_t avs_audio_ch;     /* fixed */
	uint32_t avs_audio_rate;
	uint32_t avs_audio_width;
	uint32_t avs_audio_format; /* fixed */
	uint32_t avs_audio_source; /* fixed */
	unsigned char avs_cs_info[8];
};
/*
 * PS3 audio 'card' instance
 * there should be only ONE hardware.
 */
struct snd_ps3_card_info {
	struct ps3_system_bus_device *ps3_dev;
	struct snd_card *card;

	struct snd_pcm *pcm;
	struct snd_pcm_substream *substream;

	/* hvc info */
	u64 audio_lpar_addr;
	u64 audio_lpar_size;

	/* registers */
	void __iomem *mapped_mmio_vaddr;

	/* irq */
	u64 audio_irq_outlet;
	unsigned int irq_no;

	/* remember avsetting */
	struct snd_ps3_avsetting_info avs;

	/* dma buffer management */
	spinlock_t dma_lock;
		/* dma_lock start */
		void * dma_start_vaddr[2]; /* 0 for L, 1 for R */
		dma_addr_t dma_start_bus_addr[2];
		size_t dma_buffer_size;
		void * dma_last_transfer_vaddr[2];
		void * dma_next_transfer_vaddr[2];
		int    silent;
		/* dma_lock end */

	int running;

	/* null buffer */
	void *null_buffer_start_vaddr;
	dma_addr_t null_buffer_start_dma_addr;

	/* start delay */
	unsigned int start_delay;

};


/* PS3 audio DMAC block size in bytes */
#define PS3_AUDIO_DMAC_BLOCK_SIZE (128)
/* one stage (stereo)  of audio FIFO in bytes */
#define PS3_AUDIO_FIFO_STAGE_SIZE (256)
/* how many stages the fifo have */
#define PS3_AUDIO_FIFO_STAGE_COUNT (8)
/* fifo size 128 bytes * 8 stages * stereo (2ch) */
#define PS3_AUDIO_FIFO_SIZE \
	(PS3_AUDIO_FIFO_STAGE_SIZE * PS3_AUDIO_FIFO_STAGE_COUNT)

/* PS3 audio DMAC max block count in one dma shot = 128 (0x80) blocks*/
#define PS3_AUDIO_DMAC_MAX_BLOCKS  (PS3_AUDIO_DMASIZE_BLOCKS_MASK + 1)

#define PS3_AUDIO_NORMAL_DMA_START_CH (0)
#define PS3_AUDIO_NORMAL_DMA_COUNT    (8)
#define PS3_AUDIO_NULL_DMA_START_CH \
	(PS3_AUDIO_NORMAL_DMA_START_CH + PS3_AUDIO_NORMAL_DMA_COUNT)
#define PS3_AUDIO_NULL_DMA_COUNT      (2)

#define SND_PS3_MAX_VOL (0x0F)
#define SND_PS3_MIN_VOL (0x00)
#define SND_PS3_MIN_ATT SND_PS3_MIN_VOL
#define SND_PS3_MAX_ATT SND_PS3_MAX_VOL

#define SND_PS3_PCM_PREALLOC_SIZE \
	(PS3_AUDIO_DMAC_BLOCK_SIZE * PS3_AUDIO_DMAC_MAX_BLOCKS * 4)

#define SND_PS3_DMA_REGION_SIZE \
	(SND_PS3_PCM_PREALLOC_SIZE + PAGE_SIZE)

#define PS3_AUDIO_IOID       (1UL)

#endif /* _SND_PS3_H_ */

Annotation

Implementation Notes