drivers/media/pci/bt8xx/bt878.h

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/bt8xx/bt878.h

Extension

.h

Size

3222 bytes

Lines

138

Domain

Driver Families

Bucket

drivers/media

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

• linux/interrupt.h
• linux/pci.h
• linux/sched.h
• linux/spinlock.h
• linux/mutex.h
• linux/workqueue.h
• bt848.h
• bttv.h

Detected Declarations

• struct bt878

Annotated Snippet

struct bt878 {
	struct mutex gpio_lock;
	unsigned int nr;
	unsigned int bttv_nr;
	struct i2c_adapter *adapter;
	struct pci_dev *dev;
	unsigned int id;
	unsigned int TS_Size;
	unsigned char revision;
	unsigned int irq;
	unsigned long bt878_adr;
	volatile void __iomem *bt878_mem; /* function 1 */

	volatile u32 finished_block;
	volatile u32 last_block;
	u32 block_count;
	u32 block_bytes;
	u32 line_bytes;
	u32 line_count;

	u32 buf_size;
	u8 *buf_cpu;
	dma_addr_t buf_dma;

	u32 risc_size;
	__le32 *risc_cpu;
	dma_addr_t risc_dma;
	u32 risc_pos;

	struct work_struct bh_work;
	int shutdown;
};

extern struct bt878 bt878[BT878_MAX];

void bt878_start(struct bt878 *bt, u32 controlreg, u32 op_sync_orin,
		u32 irq_err_ignore);
void bt878_stop(struct bt878 *bt);

#define bmtwrite(dat,adr)  writel((dat), (adr))
#define bmtread(adr)       readl(adr)

#endif

Annotation

• Immediate include surface: `linux/interrupt.h`, `linux/pci.h`, `linux/sched.h`, `linux/spinlock.h`, `linux/mutex.h`, `linux/workqueue.h`, `bt848.h`, `bttv.h`.
• Detected declarations: `struct bt878`.
• Atlas domain: Driver Families / drivers/media.
• 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.