include/linux/usb/ljca.h

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

File Facts

System
Linux kernel
Corpus path
include/linux/usb/ljca.h
Extension
.h
Size
4296 bytes
Lines
146
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 ljca_client {
	u8 type;
	u8 id;
	struct list_head link;
	struct auxiliary_device auxdev;
	struct ljca_adapter *adapter;

	void *context;
	ljca_event_cb_t event_cb;
	/* lock to protect event_cb */
	spinlock_t event_cb_lock;
};

/**
 * struct ljca_gpio_info - ljca gpio client device info
 *
 * @num: ljca gpio client device pin number
 * @valid_pin_map: ljca gpio client device valid pin mapping
 */
struct ljca_gpio_info {
	unsigned int num;
	DECLARE_BITMAP(valid_pin_map, LJCA_MAX_GPIO_NUM);
};

/**
 * struct ljca_i2c_info - ljca i2c client device info
 *
 * @id: ljca i2c client device identification number
 * @capacity: ljca i2c client device capacity
 * @intr_pin: ljca i2c client device interrupt pin number if exists
 */
struct ljca_i2c_info {
	u8 id;
	u8 capacity;
	u8 intr_pin;
};

/**
 * struct ljca_spi_info - ljca spi client device info
 *
 * @id: ljca spi client device identification number
 * @capacity: ljca spi client device capacity
 */
struct ljca_spi_info {
	u8 id;
	u8 capacity;
};

/**
 * ljca_register_event_cb - register a callback function to receive events
 *
 * @client: ljca client device
 * @event_cb: callback function
 * @context: execution context of event callback
 *
 * Return: 0 in case of success, negative value in case of error
 */
int ljca_register_event_cb(struct ljca_client *client, ljca_event_cb_t event_cb, void *context);

/**
 * ljca_unregister_event_cb - unregister the callback function for an event
 *
 * @client: ljca client device
 */
void ljca_unregister_event_cb(struct ljca_client *client);

/**
 * ljca_transfer - issue a LJCA command and wait for a response
 *
 * @client: ljca client device
 * @cmd: the command to be sent to the device
 * @obuf: the buffer to be sent to the device; it can be NULL if the user
 *	doesn't need to transmit data with this command
 * @obuf_len: the size of the buffer to be sent to the device; it should
 *	be 0 when obuf is NULL
 * @ibuf: any data associated with the response will be copied here; it can be
 *	NULL if the user doesn't need the response data
 * @ibuf_len: must be initialized to the input buffer size
 *
 * Return: the actual length of response data for success, negative value for errors
 */
int ljca_transfer(struct ljca_client *client, u8 cmd, const u8 *obuf,
		  u8 obuf_len, u8 *ibuf, u8 ibuf_len);

/**
 * ljca_transfer_noack - issue a LJCA command without a response
 *
 * @client: ljca client device
 * @cmd: the command to be sent to the device
 * @obuf: the buffer to be sent to the device; it can be NULL if the user

Annotation

Implementation Notes