drivers/staging/most/dim2/hal.h

Source file repositories/reference/linux-study-clean/drivers/staging/most/dim2/hal.h

File Facts

System
Linux kernel
Corpus path
drivers/staging/most/dim2/hal.h
Extension
.h
Size
2548 bytes
Lines
103
Domain
Driver Families
Bucket
drivers/staging
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 dim_ch_state {
	bool ready; /* Shows readiness to enqueue next buffer */
	u16 done_buffers; /* Number of completed buffers */
};

struct int_ch_state {
	/* changed only in interrupt context */
	volatile int request_counter;

	/* changed only in task context */
	volatile int service_counter;

	u8 idx1;
	u8 idx2;
	u8 level; /* [0..2], buffering level */
};

struct dim_channel {
	struct int_ch_state state;
	u8 addr;
	u16 dbr_addr;
	u16 dbr_size;
	u16 packet_length; /*< Isochronous packet length in bytes. */
	u16 bytes_per_frame; /*< Synchronous bytes per frame. */
	u16 done_sw_buffers_number; /*< Done software buffers number. */
};

u8 dim_startup(struct dim2_regs __iomem *dim_base_address, u32 mlb_clock,
	       u32 fcnt);

void dim_shutdown(void);

bool dim_get_lock_state(void);

u16 dim_norm_ctrl_async_buffer_size(u16 buf_size);

u16 dim_norm_isoc_buffer_size(u16 buf_size, u16 packet_length);

u16 dim_norm_sync_buffer_size(u16 buf_size, u16 bytes_per_frame);

u8 dim_init_control(struct dim_channel *ch, u8 is_tx, u16 ch_address,
		    u16 max_buffer_size);

u8 dim_init_async(struct dim_channel *ch, u8 is_tx, u16 ch_address,
		  u16 max_buffer_size);

u8 dim_init_isoc(struct dim_channel *ch, u8 is_tx, u16 ch_address,
		 u16 packet_length);

u8 dim_init_sync(struct dim_channel *ch, u8 is_tx, u16 ch_address,
		 u16 bytes_per_frame);

u8 dim_destroy_channel(struct dim_channel *ch);

void dim_service_mlb_int_irq(void);

void dim_service_ahb_int_irq(struct dim_channel *const *channels);

u8 dim_service_channel(struct dim_channel *ch);

struct dim_ch_state *dim_get_channel_state(struct dim_channel *ch,
					   struct dim_ch_state *state_ptr);

u16 dim_dbr_space(struct dim_channel *ch);

bool dim_enqueue_buffer(struct dim_channel *ch, u32 buffer_addr,
			u16 buffer_size);

bool dim_detach_buffers(struct dim_channel *ch, u16 buffers_number);

void dimcb_on_error(u8 error_id, const char *error_message);

#endif /* _DIM2_HAL_H */

Annotation

Implementation Notes