sound/soc/amd/raven/acp3x.h

Source file repositories/reference/linux-study-clean/sound/soc/amd/raven/acp3x.h

File Facts

System
Linux kernel
Corpus path
sound/soc/amd/raven/acp3x.h
Extension
.h
Size
4455 bytes
Lines
163
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 acp3x_platform_info {
	u16 play_i2s_instance;
	u16 cap_i2s_instance;
	u16 capture_channel;
};

struct i2s_dev_data {
	bool tdm_mode;
	int i2s_irq;
	u16 i2s_instance;
	u32 tdm_fmt;
	u32 substream_type;
	void __iomem *acp3x_base;
	struct snd_pcm_substream *play_stream;
	struct snd_pcm_substream *capture_stream;
	struct snd_pcm_substream *i2ssp_play_stream;
	struct snd_pcm_substream *i2ssp_capture_stream;
};

struct i2s_stream_instance {
	u16 num_pages;
	u16 i2s_instance;
	u16 capture_channel;
	u16 direction;
	u16 channels;
	u32 xfer_resolution;
	u32 val;
	dma_addr_t dma_addr;
	u64 bytescount;
	void __iomem *acp3x_base;
};

static inline u32 rv_readl(void __iomem *base_addr)
{
	return readl(base_addr - ACP3x_PHY_BASE_ADDRESS);
}

static inline void rv_writel(u32 val, void __iomem *base_addr)
{
	writel(val, base_addr - ACP3x_PHY_BASE_ADDRESS);
}

static inline u64 acp_get_byte_count(struct i2s_stream_instance *rtd,
							int direction)
{
	u64 byte_count;

	if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
		switch (rtd->i2s_instance) {
		case I2S_BT_INSTANCE:
			byte_count = rv_readl(rtd->acp3x_base +
					mmACP_BT_TX_LINEARPOSITIONCNTR_HIGH);
			byte_count |= rv_readl(rtd->acp3x_base +
					mmACP_BT_TX_LINEARPOSITIONCNTR_LOW);
			break;
		case I2S_SP_INSTANCE:
		default:
			byte_count = rv_readl(rtd->acp3x_base +
					mmACP_I2S_TX_LINEARPOSITIONCNTR_HIGH);
			byte_count |= rv_readl(rtd->acp3x_base +
					mmACP_I2S_TX_LINEARPOSITIONCNTR_LOW);
		}

	} else {
		switch (rtd->i2s_instance) {
		case I2S_BT_INSTANCE:
			byte_count = rv_readl(rtd->acp3x_base +
					mmACP_BT_RX_LINEARPOSITIONCNTR_HIGH);
			byte_count |= rv_readl(rtd->acp3x_base +
					mmACP_BT_RX_LINEARPOSITIONCNTR_LOW);
			break;
		case I2S_SP_INSTANCE:
		default:
			byte_count = rv_readl(rtd->acp3x_base +
					mmACP_I2S_RX_LINEARPOSITIONCNTR_HIGH);
			byte_count |= rv_readl(rtd->acp3x_base +
					mmACP_I2S_RX_LINEARPOSITIONCNTR_LOW);
		}
	}
	return byte_count;
}

Annotation

Implementation Notes