include/uapi/linux/usb/ch9.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/usb/ch9.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/usb/ch9.h
Extension
.h
Size
41079 bytes
Lines
1307
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_ctrlrequest {
	__u8 bRequestType;
	__u8 bRequest;
	__le16 wValue;
	__le16 wIndex;
	__le16 wLength;
} __attribute__ ((packed));

/*-------------------------------------------------------------------------*/

/*
 * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
 * (rarely) accepted by SET_DESCRIPTOR.
 *
 * Note that all multi-byte values here are encoded in little endian
 * byte order "on the wire".  Within the kernel and when exposed
 * through the Linux-USB APIs, they are not converted to cpu byte
 * order; it is the responsibility of the client code to do this.
 * The single exception is when device and configuration descriptors (but
 * not other descriptors) are read from character devices
 * (i.e. /dev/bus/usb/BBB/DDD);
 * in this case the fields are converted to host endianness by the kernel.
 */

/*
 * Descriptor types ... USB 2.0 spec table 9.5
 */
#define USB_DT_DEVICE			0x01
#define USB_DT_CONFIG			0x02
#define USB_DT_STRING			0x03
#define USB_DT_INTERFACE		0x04
#define USB_DT_ENDPOINT			0x05
#define USB_DT_DEVICE_QUALIFIER		0x06
#define USB_DT_OTHER_SPEED_CONFIG	0x07
#define USB_DT_INTERFACE_POWER		0x08
/* these are from a minor usb 2.0 revision (ECN) */
#define USB_DT_OTG			0x09
#define USB_DT_DEBUG			0x0a
#define USB_DT_INTERFACE_ASSOCIATION	0x0b
/* these are from the Wireless USB spec */
#define USB_DT_SECURITY			0x0c
#define USB_DT_KEY			0x0d
#define USB_DT_ENCRYPTION_TYPE		0x0e
#define USB_DT_BOS			0x0f
#define USB_DT_DEVICE_CAPABILITY	0x10
#define USB_DT_WIRELESS_ENDPOINT_COMP	0x11
/* From the eUSB2 spec */
#define USB_DT_EUSB2_ISOC_ENDPOINT_COMP	0x12
/* From Wireless USB spec */
#define USB_DT_WIRE_ADAPTER		0x21
/* From USB Device Firmware Upgrade Specification, Revision 1.1 */
#define USB_DT_DFU_FUNCTIONAL		0x21
/* these are from the Wireless USB spec */
#define USB_DT_RPIPE			0x22
#define USB_DT_CS_RADIO_CONTROL		0x23
/* From the T10 UAS specification */
#define USB_DT_PIPE_USAGE		0x24
/* From the USB 3.0 spec */
#define	USB_DT_SS_ENDPOINT_COMP		0x30
/* From the USB 3.1 spec */
#define	USB_DT_SSP_ISOC_ENDPOINT_COMP	0x31

/* Conventional codes for class-specific descriptors.  The convention is
 * defined in the USB "Common Class" Spec (3.11).  Individual class specs
 * are authoritative for their usage, not the "common class" writeup.
 */
#define USB_DT_CS_DEVICE		(USB_TYPE_CLASS | USB_DT_DEVICE)
#define USB_DT_CS_CONFIG		(USB_TYPE_CLASS | USB_DT_CONFIG)
#define USB_DT_CS_STRING		(USB_TYPE_CLASS | USB_DT_STRING)
#define USB_DT_CS_INTERFACE		(USB_TYPE_CLASS | USB_DT_INTERFACE)
#define USB_DT_CS_ENDPOINT		(USB_TYPE_CLASS | USB_DT_ENDPOINT)

/* All standard descriptors have these 2 fields at the beginning */
struct usb_descriptor_header {
	__u8  bLength;
	__u8  bDescriptorType;
} __attribute__ ((packed));


/*-------------------------------------------------------------------------*/

/* USB_DT_DEVICE: Device descriptor */
struct usb_device_descriptor {
	__u8  bLength;
	__u8  bDescriptorType;

	__le16 bcdUSB;
	__u8  bDeviceClass;
	__u8  bDeviceSubClass;
	__u8  bDeviceProtocol;

Annotation

Implementation Notes