include/linux/usb/role.h

Source file repositories/reference/linux-study-clean/include/linux/usb/role.h

File Facts

System
Linux kernel
Corpus path
include/linux/usb/role.h
Extension
.h
Size
3663 bytes
Lines
127
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct usb_role_switch_desc {
	struct fwnode_handle *fwnode;
	struct device *usb2_port;
	struct device *usb3_port;
	struct device *udc;
	usb_role_switch_set_t set;
	usb_role_switch_get_t get;
	bool allow_userspace_control;
	void *driver_data;
	const char *name;
};


#if IS_ENABLED(CONFIG_USB_ROLE_SWITCH)
int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role);
enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw);
struct usb_role_switch *usb_role_switch_get(struct device *dev);
struct usb_role_switch *fwnode_usb_role_switch_get(struct fwnode_handle *node);
void usb_role_switch_put(struct usb_role_switch *sw);

struct usb_role_switch *
usb_role_switch_find_by_fwnode(const struct fwnode_handle *fwnode);

struct usb_role_switch *
usb_role_switch_register(struct device *parent,
			 const struct usb_role_switch_desc *desc);
void usb_role_switch_unregister(struct usb_role_switch *sw);

void usb_role_switch_set_drvdata(struct usb_role_switch *sw, void *data);
void *usb_role_switch_get_drvdata(struct usb_role_switch *sw);
const char *usb_role_string(enum usb_role role);
#else
static inline int usb_role_switch_set_role(struct usb_role_switch *sw,
		enum usb_role role)
{
	return 0;
}

static inline enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw)
{
	return USB_ROLE_NONE;
}

static inline struct usb_role_switch *usb_role_switch_get(struct device *dev)
{
	return ERR_PTR(-ENODEV);
}

static inline struct usb_role_switch *
fwnode_usb_role_switch_get(struct fwnode_handle *node)
{
	return ERR_PTR(-ENODEV);
}

static inline void usb_role_switch_put(struct usb_role_switch *sw) { }

static inline struct usb_role_switch *
usb_role_switch_find_by_fwnode(const struct fwnode_handle *fwnode)
{
	return NULL;
}

static inline struct usb_role_switch *
usb_role_switch_register(struct device *parent,
			 const struct usb_role_switch_desc *desc)
{
	return ERR_PTR(-ENODEV);
}

static inline void usb_role_switch_unregister(struct usb_role_switch *sw) { }

static inline void
usb_role_switch_set_drvdata(struct usb_role_switch *sw, void *data)
{
}

static inline void *usb_role_switch_get_drvdata(struct usb_role_switch *sw)
{
	return NULL;
}

static inline const char *usb_role_string(enum usb_role role)
{
	return "unknown";
}

#endif

#endif /* __LINUX_USB_ROLE_H */

Annotation

Implementation Notes