drivers/usb/gadget/function/g_zero.h

Source file repositories/reference/linux-study-clean/drivers/usb/gadget/function/g_zero.h

File Facts

System
Linux kernel
Corpus path
drivers/usb/gadget/function/g_zero.h
Extension
.h
Size
1702 bytes
Lines
75
Domain
Driver Families
Bucket
drivers/usb
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 usb_zero_options {
	unsigned pattern;
	unsigned isoc_interval;
	unsigned isoc_maxpacket;
	unsigned isoc_mult;
	unsigned isoc_maxburst;
	unsigned bulk_buflen;
	unsigned qlen;
	unsigned ss_bulk_qlen;
	unsigned ss_iso_qlen;
};

struct f_ss_opts {
	struct usb_function_instance func_inst;
	unsigned pattern;
	unsigned isoc_interval;
	unsigned isoc_maxpacket;
	unsigned isoc_mult;
	unsigned isoc_maxburst;
	unsigned bulk_buflen;
	unsigned bulk_maxburst;
	unsigned bulk_qlen;
	unsigned iso_qlen;

	/*
	 * Read/write access to configfs attributes is handled by configfs.
	 *
	 * This is to protect the data from concurrent access by read/write
	 * and create symlink/remove symlink.
	 */
	struct mutex			lock;
	int				refcnt;
};

struct f_lb_opts {
	struct usb_function_instance func_inst;
	unsigned bulk_buflen;
	unsigned qlen;

	/*
	 * Read/write access to configfs attributes is handled by configfs.
	 *
	 * This is to protect the data from concurrent access by read/write
	 * and create symlink/remove symlink.
	 */
	struct mutex			lock;
	int				refcnt;
};

void lb_modexit(void);
int lb_modinit(void);

/* common utilities */
void disable_endpoints(struct usb_composite_dev *cdev,
		struct usb_ep *in, struct usb_ep *out,
		struct usb_ep *iso_in, struct usb_ep *iso_out);

#endif /* __G_ZERO_H */

Annotation

Implementation Notes