OSCL-LXR linux-6.0.1/​include/​uapi/​linux/​usb/​ch9.h	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * This file holds USB constants and structures that are needed for
  * USB device APIs.  These are used by the USB device model, which is
  * defined in chapter 9 of the USB 2.0 specification and in the
  * Wireless USB 1.0 (spread around).  Linux has several APIs in C that
  * need these:
  *
  * - the master/host side Linux-USB kernel driver API;
  * - the "usbfs" user space API; and
  * - the Linux "gadget" slave/device/peripheral side driver API.
  *
  * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
  * act either as a USB master/host or as a USB slave/device.  That means
  * the master and slave side APIs benefit from working well together.
  *
  * There's also "Wireless USB", using low power short range radios for
  * peripheral interconnection but otherwise building on the USB framework.
  *
  * Note all descriptors are declared '__attribute__((packed))' so that:
  *
  * [a] they never get padded, either internally (USB spec writers
  *     probably handled that) or externally;
  *
  * [b] so that accessing bigger-than-a-bytes fields will never
  *     generate bus errors on any platform, even when the location of
  *     its descriptor inside a bundle isn't "naturally aligned", and
  *
  * [c] for consistency, removing all doubt even when it appears to
  *     someone that the two other points are non-issues for that
  *     particular descriptor type.
  */
 
 #ifndef _UAPI__LINUX_USB_CH9_H
 #define _UAPI__LINUX_USB_CH9_H
 
 #include <linux/types.h>    /* __u8 etc */
 #include <asm/byteorder.h>  /* le16_to_cpu */
 
 /*-------------------------------------------------------------------------*/
 
 /* CONTROL REQUEST SUPPORT */
 
 /*
  * USB directions
  *
  * This bit flag is used in endpoint descriptors' bEndpointAddress field.
  * It's also one of three fields in control requests bRequestType.
  */
 #define USB_DIR_OUT         0       /* to device */
 #define USB_DIR_IN          0x80        /* to host */
 
 /*
  * USB types, the second of three bRequestType fields
  */
 #define USB_TYPE_MASK           (0x03 << 5)
 #define USB_TYPE_STANDARD       (0x00 << 5)
 #define USB_TYPE_CLASS          (0x01 << 5)
 #define USB_TYPE_VENDOR         (0x02 << 5)
 #define USB_TYPE_RESERVED       (0x03 << 5)
 
 /*
  * USB recipients, the third of three bRequestType fields
  */
 #define USB_RECIP_MASK          0x1f
 #define USB_RECIP_DEVICE        0x00
 #define USB_RECIP_INTERFACE     0x01
 #define USB_RECIP_ENDPOINT      0x02
 #define USB_RECIP_OTHER         0x03
 /* From Wireless USB 1.0 */
 #define USB_RECIP_PORT          0x04
 #define USB_RECIP_RPIPE     0x05
 
 /*
  * Standard requests, for the bRequest field of a SETUP packet.
  *
  * These are qualified by the bRequestType field, so that for example
  * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
  * by a GET_STATUS request.
  */
 #define USB_REQ_GET_STATUS      0x00
 #define USB_REQ_CLEAR_FEATURE       0x01
 #define USB_REQ_SET_FEATURE     0x03
 #define USB_REQ_SET_ADDRESS     0x05
 #define USB_REQ_GET_DESCRIPTOR      0x06
 #define USB_REQ_SET_DESCRIPTOR      0x07
 #define USB_REQ_GET_CONFIGURATION   0x08
 #define USB_REQ_SET_CONFIGURATION   0x09
 #define USB_REQ_GET_INTERFACE       0x0A
 #define USB_REQ_SET_INTERFACE       0x0B
 #define USB_REQ_SYNCH_FRAME     0x0C
 #define USB_REQ_SET_SEL         0x30
 #define USB_REQ_SET_ISOCH_DELAY     0x31
 
 #define USB_REQ_SET_ENCRYPTION      0x0D    /* Wireless USB */
 #define USB_REQ_GET_ENCRYPTION      0x0E
 #define USB_REQ_RPIPE_ABORT     0x0E
 #define USB_REQ_SET_HANDSHAKE       0x0F
 #define USB_REQ_RPIPE_RESET     0x0F
 #define USB_REQ_GET_HANDSHAKE       0x10
 #define USB_REQ_SET_CONNECTION      0x11
 #define USB_REQ_SET_SECURITY_DATA   0x12
 #define USB_REQ_GET_SECURITY_DATA   0x13
 #define USB_REQ_SET_WUSB_DATA       0x14
 #define USB_REQ_LOOPBACK_DATA_WRITE 0x15
 #define USB_REQ_LOOPBACK_DATA_READ  0x16
 #define USB_REQ_SET_INTERFACE_DS    0x17
 
 /* specific requests for USB Power Delivery */
 #define USB_REQ_GET_PARTNER_PDO     20
 #define USB_REQ_GET_BATTERY_STATUS  21
 #define USB_REQ_SET_PDO         22
 #define USB_REQ_GET_VDM         23
 #define USB_REQ_SEND_VDM        24
 
 /* The Link Power Management (LPM) ECN defines USB_REQ_TEST_AND_SET command,
  * used by hubs to put ports into a new L1 suspend state, except that it
  * forgot to define its number ...
  */
 
 /*
  * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
  * are read as a bit array returned by USB_REQ_GET_STATUS.  (So there
  * are at most sixteen features of each type.)  Hubs may also support a
  * new USB_REQ_TEST_AND_SET_FEATURE to put ports into L1 suspend.
  */
 #define USB_DEVICE_SELF_POWERED     0   /* (read only) */
 #define USB_DEVICE_REMOTE_WAKEUP    1   /* dev may initiate wakeup */
 #define USB_DEVICE_TEST_MODE        2   /* (wired high speed only) */
 #define USB_DEVICE_BATTERY      2   /* (wireless) */
 #define USB_DEVICE_B_HNP_ENABLE     3   /* (otg) dev may initiate HNP */
 #define USB_DEVICE_WUSB_DEVICE      3   /* (wireless)*/
 #define USB_DEVICE_A_HNP_SUPPORT    4   /* (otg) RH port supports HNP */
 #define USB_DEVICE_A_ALT_HNP_SUPPORT    5   /* (otg) other RH port does */
 #define USB_DEVICE_DEBUG_MODE       6   /* (special devices only) */
 
 /*
  * Test Mode Selectors
  * See USB 2.0 spec Table 9-7
  */
 #define USB_TEST_J      1
 #define USB_TEST_K      2
 #define USB_TEST_SE0_NAK    3
 #define USB_TEST_PACKET     4
 #define USB_TEST_FORCE_ENABLE   5
 
 /* Status Type */
 #define USB_STATUS_TYPE_STANDARD    0
 #define USB_STATUS_TYPE_PTM     1
 
 /*
  * New Feature Selectors as added by USB 3.0
  * See USB 3.0 spec Table 9-7
  */
 #define USB_DEVICE_U1_ENABLE    48  /* dev may initiate U1 transition */
 #define USB_DEVICE_U2_ENABLE    49  /* dev may initiate U2 transition */
 #define USB_DEVICE_LTM_ENABLE   50  /* dev may send LTM */
 #define USB_INTRF_FUNC_SUSPEND  0   /* function suspend */
 
 #define USB_INTR_FUNC_SUSPEND_OPT_MASK  0xFF00
 /*
  * Suspend Options, Table 9-8 USB 3.0 spec
  */
 #define USB_INTRF_FUNC_SUSPEND_LP   (1 << (8 + 0))
 #define USB_INTRF_FUNC_SUSPEND_RW   (1 << (8 + 1))
 
 /*
  * Interface status, Figure 9-5 USB 3.0 spec
  */
 #define USB_INTRF_STAT_FUNC_RW_CAP     1
 #define USB_INTRF_STAT_FUNC_RW         2
 
 #define USB_ENDPOINT_HALT       0   /* IN/OUT will STALL */
 
 /* Bit array elements as returned by the USB_REQ_GET_STATUS request. */
 #define USB_DEV_STAT_U1_ENABLED     2   /* transition into U1 state */
 #define USB_DEV_STAT_U2_ENABLED     3   /* transition into U2 state */
 #define USB_DEV_STAT_LTM_ENABLED    4   /* Latency tolerance messages */
 
 /*
  * Feature selectors from Table 9-8 USB Power Delivery spec
  */
 #define USB_DEVICE_BATTERY_WAKE_MASK    40
 #define USB_DEVICE_OS_IS_PD_AWARE   41
 #define USB_DEVICE_POLICY_MODE      42
 #define USB_PORT_PR_SWAP        43
 #define USB_PORT_GOTO_MIN       44
 #define USB_PORT_RETURN_POWER       45
 #define USB_PORT_ACCEPT_PD_REQUEST  46
 #define USB_PORT_REJECT_PD_REQUEST  47
 #define USB_PORT_PORT_PD_RESET      48
 #define USB_PORT_C_PORT_PD_CHANGE   49
 #define USB_PORT_CABLE_PD_RESET     50
 #define USB_DEVICE_CHARGING_POLICY  54
 
 /**
  * struct usb_ctrlrequest - SETUP data for a USB device control request
  * @bRequestType: matches the USB bmRequestType field
  * @bRequest: matches the USB bRequest field
  * @wValue: matches the USB wValue field (le16 byte order)
  * @wIndex: matches the USB wIndex field (le16 byte order)
  * @wLength: matches the USB wLength field (le16 byte order)
  *
  * This structure is used to send control requests to a USB device.  It matches
  * the different fields of the USB 2.0 Spec section 9.3, table 9-2.  See the
  * USB spec for a fuller description of the different fields, and what they are
  * used for.
  *
  * Note that the driver for any interface can issue control requests.
  * For most devices, interfaces don't coordinate with each other, so
  * such requests may be made at any time.
  */
 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
 #define USB_DT_WIRE_ADAPTER     0x21
 #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;
     __u8  bMaxPacketSize0;
     __le16 idVendor;
     __le16 idProduct;
     __le16 bcdDevice;
     __u8  iManufacturer;
     __u8  iProduct;
     __u8  iSerialNumber;
     __u8  bNumConfigurations;
 } __attribute__ ((packed));
 
 #define USB_DT_DEVICE_SIZE      18
 
 
 /*
  * Device and/or Interface Class codes
  * as found in bDeviceClass or bInterfaceClass
  * and defined by www.usb.org documents
  */
 #define USB_CLASS_PER_INTERFACE     0   /* for DeviceClass */
 #define USB_CLASS_AUDIO         1
 #define USB_CLASS_COMM          2
 #define USB_CLASS_HID           3
 #define USB_CLASS_PHYSICAL      5
 #define USB_CLASS_STILL_IMAGE       6
 #define USB_CLASS_PRINTER       7
 #define USB_CLASS_MASS_STORAGE      8
 #define USB_CLASS_HUB           9
 #define USB_CLASS_CDC_DATA      0x0a
 #define USB_CLASS_CSCID         0x0b    /* chip+ smart card */
 #define USB_CLASS_CONTENT_SEC       0x0d    /* content security */
 #define USB_CLASS_VIDEO         0x0e
 #define USB_CLASS_WIRELESS_CONTROLLER   0xe0
 #define USB_CLASS_PERSONAL_HEALTHCARE   0x0f
 #define USB_CLASS_AUDIO_VIDEO       0x10
 #define USB_CLASS_BILLBOARD     0x11
 #define USB_CLASS_USB_TYPE_C_BRIDGE 0x12
 #define USB_CLASS_MISC          0xef
 #define USB_CLASS_APP_SPEC      0xfe
 #define USB_CLASS_VENDOR_SPEC       0xff
 
 #define USB_SUBCLASS_VENDOR_SPEC    0xff
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_CONFIG: Configuration descriptor information.
  *
  * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
  * descriptor type is different.  Highspeed-capable devices can look
  * different depending on what speed they're currently running.  Only
  * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
  * descriptors.
  */
 struct usb_config_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __le16 wTotalLength;
     __u8  bNumInterfaces;
     __u8  bConfigurationValue;
     __u8  iConfiguration;
     __u8  bmAttributes;
     __u8  bMaxPower;
 } __attribute__ ((packed));
 
 #define USB_DT_CONFIG_SIZE      9
 
 /* from config descriptor bmAttributes */
 #define USB_CONFIG_ATT_ONE      (1 << 7)    /* must be set */
 #define USB_CONFIG_ATT_SELFPOWER    (1 << 6)    /* self powered */
 #define USB_CONFIG_ATT_WAKEUP       (1 << 5)    /* can wakeup */
 #define USB_CONFIG_ATT_BATTERY      (1 << 4)    /* battery powered */
 
 /*-------------------------------------------------------------------------*/
 
 /* USB String descriptors can contain at most 126 characters. */
 #define USB_MAX_STRING_LEN  126
 
 /* USB_DT_STRING: String descriptor */
 struct usb_string_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __le16 wData[1];        /* UTF-16LE encoded */
 } __attribute__ ((packed));
 
 /* note that "string" zero is special, it holds language codes that
  * the device supports, not Unicode characters.
  */
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_INTERFACE: Interface descriptor */
 struct usb_interface_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __u8  bInterfaceNumber;
     __u8  bAlternateSetting;
     __u8  bNumEndpoints;
     __u8  bInterfaceClass;
     __u8  bInterfaceSubClass;
     __u8  bInterfaceProtocol;
     __u8  iInterface;
 } __attribute__ ((packed));
 
 #define USB_DT_INTERFACE_SIZE       9
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_ENDPOINT: Endpoint descriptor */
 struct usb_endpoint_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __u8  bEndpointAddress;
     __u8  bmAttributes;
     __le16 wMaxPacketSize;
     __u8  bInterval;
 
     /* NOTE:  these two are _only_ in audio endpoints. */
     /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
     __u8  bRefresh;
     __u8  bSynchAddress;
 } __attribute__ ((packed));
 
 #define USB_DT_ENDPOINT_SIZE        7
 #define USB_DT_ENDPOINT_AUDIO_SIZE  9   /* Audio extension */
 
 
 /*
  * Endpoints
  */
 #define USB_ENDPOINT_NUMBER_MASK    0x0f    /* in bEndpointAddress */
 #define USB_ENDPOINT_DIR_MASK       0x80
 
 #define USB_ENDPOINT_XFERTYPE_MASK  0x03    /* in bmAttributes */
 #define USB_ENDPOINT_XFER_CONTROL   0
 #define USB_ENDPOINT_XFER_ISOC      1
 #define USB_ENDPOINT_XFER_BULK      2
 #define USB_ENDPOINT_XFER_INT       3
 #define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
 
 #define USB_ENDPOINT_MAXP_MASK  0x07ff
 #define USB_EP_MAXP_MULT_SHIFT  11
 #define USB_EP_MAXP_MULT_MASK   (3 << USB_EP_MAXP_MULT_SHIFT)
 #define USB_EP_MAXP_MULT(m) \
     (((m) & USB_EP_MAXP_MULT_MASK) >> USB_EP_MAXP_MULT_SHIFT)
 
 /* The USB 3.0 spec redefines bits 5:4 of bmAttributes as interrupt ep type. */
 #define USB_ENDPOINT_INTRTYPE       0x30
 #define USB_ENDPOINT_INTR_PERIODIC  (0 << 4)
 #define USB_ENDPOINT_INTR_NOTIFICATION  (1 << 4)
 
 #define USB_ENDPOINT_SYNCTYPE       0x0c
 #define USB_ENDPOINT_SYNC_NONE      (0 << 2)
 #define USB_ENDPOINT_SYNC_ASYNC     (1 << 2)
 #define USB_ENDPOINT_SYNC_ADAPTIVE  (2 << 2)
 #define USB_ENDPOINT_SYNC_SYNC      (3 << 2)
 
 #define USB_ENDPOINT_USAGE_MASK     0x30
 #define USB_ENDPOINT_USAGE_DATA     0x00
 #define USB_ENDPOINT_USAGE_FEEDBACK 0x10
 #define USB_ENDPOINT_USAGE_IMPLICIT_FB  0x20    /* Implicit feedback Data endpoint */
 
 /*-------------------------------------------------------------------------*/
 
 /**
  * usb_endpoint_num - get the endpoint's number
  * @epd: endpoint to be checked
  *
  * Returns @epd's number: 0 to 15.
  */
 static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
 {
     return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 }
 
 /**
  * usb_endpoint_type - get the endpoint's transfer type
  * @epd: endpoint to be checked
  *
  * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
  * to @epd's transfer type.
  */
 static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
 {
     return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
 }
 
 /**
  * usb_endpoint_dir_in - check if the endpoint has IN direction
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint is of type IN, otherwise it returns false.
  */
 static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
 {
     return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN);
 }
 
 /**
  * usb_endpoint_dir_out - check if the endpoint has OUT direction
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint is of type OUT, otherwise it returns false.
  */
 static inline int usb_endpoint_dir_out(
                 const struct usb_endpoint_descriptor *epd)
 {
     return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT);
 }
 
 /**
  * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint is of type bulk, otherwise it returns false.
  */
 static inline int usb_endpoint_xfer_bulk(
                 const struct usb_endpoint_descriptor *epd)
 {
     return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
         USB_ENDPOINT_XFER_BULK);
 }
 
 /**
  * usb_endpoint_xfer_control - check if the endpoint has control transfer type
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint is of type control, otherwise it returns false.
  */
 static inline int usb_endpoint_xfer_control(
                 const struct usb_endpoint_descriptor *epd)
 {
     return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
         USB_ENDPOINT_XFER_CONTROL);
 }
 
 /**
  * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint is of type interrupt, otherwise it returns
  * false.
  */
 static inline int usb_endpoint_xfer_int(
                 const struct usb_endpoint_descriptor *epd)
 {
     return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
         USB_ENDPOINT_XFER_INT);
 }
 
 /**
  * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint is of type isochronous, otherwise it returns
  * false.
  */
 static inline int usb_endpoint_xfer_isoc(
                 const struct usb_endpoint_descriptor *epd)
 {
     return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
         USB_ENDPOINT_XFER_ISOC);
 }
 
 /**
  * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint has bulk transfer type and IN direction,
  * otherwise it returns false.
  */
 static inline int usb_endpoint_is_bulk_in(
                 const struct usb_endpoint_descriptor *epd)
 {
     return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd);
 }
 
 /**
  * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint has bulk transfer type and OUT direction,
  * otherwise it returns false.
  */
 static inline int usb_endpoint_is_bulk_out(
                 const struct usb_endpoint_descriptor *epd)
 {
     return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd);
 }
 
 /**
  * usb_endpoint_is_int_in - check if the endpoint is interrupt IN
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint has interrupt transfer type and IN direction,
  * otherwise it returns false.
  */
 static inline int usb_endpoint_is_int_in(
                 const struct usb_endpoint_descriptor *epd)
 {
     return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd);
 }
 
 /**
  * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint has interrupt transfer type and OUT direction,
  * otherwise it returns false.
  */
 static inline int usb_endpoint_is_int_out(
                 const struct usb_endpoint_descriptor *epd)
 {
     return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd);
 }
 
 /**
  * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint has isochronous transfer type and IN direction,
  * otherwise it returns false.
  */
 static inline int usb_endpoint_is_isoc_in(
                 const struct usb_endpoint_descriptor *epd)
 {
     return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd);
 }
 
 /**
  * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT
  * @epd: endpoint to be checked
  *
  * Returns true if the endpoint has isochronous transfer type and OUT direction,
  * otherwise it returns false.
  */
 static inline int usb_endpoint_is_isoc_out(
                 const struct usb_endpoint_descriptor *epd)
 {
     return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd);
 }
 
 /**
  * usb_endpoint_maxp - get endpoint's max packet size
  * @epd: endpoint to be checked
  *
  * Returns @epd's max packet bits [10:0]
  */
 static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd)
 {
     return __le16_to_cpu(epd->wMaxPacketSize) & USB_ENDPOINT_MAXP_MASK;
 }
 
 /**
  * usb_endpoint_maxp_mult - get endpoint's transactional opportunities
  * @epd: endpoint to be checked
  *
  * Return @epd's wMaxPacketSize[12:11] + 1
  */
 static inline int
 usb_endpoint_maxp_mult(const struct usb_endpoint_descriptor *epd)
 {
     int maxp = __le16_to_cpu(epd->wMaxPacketSize);
 
     return USB_EP_MAXP_MULT(maxp) + 1;
 }
 
 static inline int usb_endpoint_interrupt_type(
         const struct usb_endpoint_descriptor *epd)
 {
     return epd->bmAttributes & USB_ENDPOINT_INTRTYPE;
 }
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_SSP_ISOC_ENDPOINT_COMP: SuperSpeedPlus Isochronous Endpoint Companion
  * descriptor
  */
 struct usb_ssp_isoc_ep_comp_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
     __le16 wReseved;
     __le32 dwBytesPerInterval;
 } __attribute__ ((packed));
 
 #define USB_DT_SSP_ISOC_EP_COMP_SIZE        8
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
 struct usb_ss_ep_comp_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __u8  bMaxBurst;
     __u8  bmAttributes;
     __le16 wBytesPerInterval;
 } __attribute__ ((packed));
 
 #define USB_DT_SS_EP_COMP_SIZE      6
 
 /* Bits 4:0 of bmAttributes if this is a bulk endpoint */
 static inline int
 usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp)
 {
     int     max_streams;
 
     if (!comp)
         return 0;
 
     max_streams = comp->bmAttributes & 0x1f;
 
     if (!max_streams)
         return 0;
 
     max_streams = 1 << max_streams;
 
     return max_streams;
 }
 
 /* Bits 1:0 of bmAttributes if this is an isoc endpoint */
 #define USB_SS_MULT(p)          (1 + ((p) & 0x3))
 /* Bit 7 of bmAttributes if a SSP isoc endpoint companion descriptor exists */
 #define USB_SS_SSP_ISOC_COMP(p)     ((p) & (1 << 7))
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
 struct usb_qualifier_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __le16 bcdUSB;
     __u8  bDeviceClass;
     __u8  bDeviceSubClass;
     __u8  bDeviceProtocol;
     __u8  bMaxPacketSize0;
     __u8  bNumConfigurations;
     __u8  bRESERVED;
 } __attribute__ ((packed));
 
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_OTG (from OTG 1.0a supplement) */
 struct usb_otg_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __u8  bmAttributes; /* support for HNP, SRP, etc */
 } __attribute__ ((packed));
 
 /* USB_DT_OTG (from OTG 2.0 supplement) */
 struct usb_otg20_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __u8  bmAttributes; /* support for HNP, SRP and ADP, etc */
     __le16 bcdOTG;      /* OTG and EH supplement release number
                  * in binary-coded decimal(i.e. 2.0 is 0200H)
                  */
 } __attribute__ ((packed));
 
 /* from usb_otg_descriptor.bmAttributes */
 #define USB_OTG_SRP     (1 << 0)
 #define USB_OTG_HNP     (1 << 1)    /* swap host/device roles */
 #define USB_OTG_ADP     (1 << 2)    /* support ADP */
 
 #define OTG_STS_SELECTOR    0xF000      /* OTG status selector */
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_DEBUG:  for special highspeed devices, replacing serial console */
 struct usb_debug_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     /* bulk endpoints with 8 byte maxpacket */
     __u8  bDebugInEndpoint;
     __u8  bDebugOutEndpoint;
 } __attribute__((packed));
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
 struct usb_interface_assoc_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __u8  bFirstInterface;
     __u8  bInterfaceCount;
     __u8  bFunctionClass;
     __u8  bFunctionSubClass;
     __u8  bFunctionProtocol;
     __u8  iFunction;
 } __attribute__ ((packed));
 
 #define USB_DT_INTERFACE_ASSOCIATION_SIZE   8
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_SECURITY:  group of wireless security descriptors, including
  * encryption types available for setting up a CC/association.
  */
 struct usb_security_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __le16 wTotalLength;
     __u8  bNumEncryptionTypes;
 } __attribute__((packed));
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_KEY:  used with {GET,SET}_SECURITY_DATA; only public keys
  * may be retrieved.
  */
 struct usb_key_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __u8  tTKID[3];
     __u8  bReserved;
     __u8  bKeyData[];
 } __attribute__((packed));
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_ENCRYPTION_TYPE:  bundled in DT_SECURITY groups */
 struct usb_encryption_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __u8  bEncryptionType;
 #define USB_ENC_TYPE_UNSECURE       0
 #define USB_ENC_TYPE_WIRED      1   /* non-wireless mode */
 #define USB_ENC_TYPE_CCM_1      2   /* aes128/cbc session */
 #define USB_ENC_TYPE_RSA_1      3   /* rsa3072/sha1 auth */
     __u8  bEncryptionValue;     /* use in SET_ENCRYPTION */
     __u8  bAuthKeyIndex;
 } __attribute__((packed));
 
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_BOS:  group of device-level capabilities */
 struct usb_bos_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __le16 wTotalLength;
     __u8  bNumDeviceCaps;
 } __attribute__((packed));
 
 #define USB_DT_BOS_SIZE     5
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_DEVICE_CAPABILITY:  grouped with BOS */
 struct usb_dev_cap_header {
     __u8  bLength;
     __u8  bDescriptorType;
     __u8  bDevCapabilityType;
 } __attribute__((packed));
 
 #define USB_CAP_TYPE_WIRELESS_USB   1
 
 struct usb_wireless_cap_descriptor {    /* Ultra Wide Band */
     __u8  bLength;
     __u8  bDescriptorType;
     __u8  bDevCapabilityType;
 
     __u8  bmAttributes;
 #define USB_WIRELESS_P2P_DRD        (1 << 1)
 #define USB_WIRELESS_BEACON_MASK    (3 << 2)
 #define USB_WIRELESS_BEACON_SELF    (1 << 2)
 #define USB_WIRELESS_BEACON_DIRECTED    (2 << 2)
 #define USB_WIRELESS_BEACON_NONE    (3 << 2)
     __le16 wPHYRates;   /* bit rates, Mbps */
 #define USB_WIRELESS_PHY_53     (1 << 0)    /* always set */
 #define USB_WIRELESS_PHY_80     (1 << 1)
 #define USB_WIRELESS_PHY_107        (1 << 2)    /* always set */
 #define USB_WIRELESS_PHY_160        (1 << 3)
 #define USB_WIRELESS_PHY_200        (1 << 4)    /* always set */
 #define USB_WIRELESS_PHY_320        (1 << 5)
 #define USB_WIRELESS_PHY_400        (1 << 6)
 #define USB_WIRELESS_PHY_480        (1 << 7)
     __u8  bmTFITXPowerInfo; /* TFI power levels */
     __u8  bmFFITXPowerInfo; /* FFI power levels */
     __le16 bmBandGroup;
     __u8  bReserved;
 } __attribute__((packed));
 
 #define USB_DT_USB_WIRELESS_CAP_SIZE    11
 
 /* USB 2.0 Extension descriptor */
 #define USB_CAP_TYPE_EXT        2
 
 struct usb_ext_cap_descriptor {     /* Link Power Management */
     __u8  bLength;
     __u8  bDescriptorType;
     __u8  bDevCapabilityType;
     __le32 bmAttributes;
 #define USB_LPM_SUPPORT         (1 << 1)    /* supports LPM */
 #define USB_BESL_SUPPORT        (1 << 2)    /* supports BESL */
 #define USB_BESL_BASELINE_VALID     (1 << 3)    /* Baseline BESL valid*/
 #define USB_BESL_DEEP_VALID     (1 << 4)    /* Deep BESL valid */
 #define USB_SET_BESL_BASELINE(p)    (((p) & 0xf) << 8)
 #define USB_SET_BESL_DEEP(p)        (((p) & 0xf) << 12)
 #define USB_GET_BESL_BASELINE(p)    (((p) & (0xf << 8)) >> 8)
 #define USB_GET_BESL_DEEP(p)        (((p) & (0xf << 12)) >> 12)
 } __attribute__((packed));
 
 #define USB_DT_USB_EXT_CAP_SIZE 7
 
 /*
  * SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB
  * specific device level capabilities
  */
 #define     USB_SS_CAP_TYPE     3
 struct usb_ss_cap_descriptor {      /* Link Power Management */
     __u8  bLength;
     __u8  bDescriptorType;
     __u8  bDevCapabilityType;
     __u8  bmAttributes;
 #define USB_LTM_SUPPORT         (1 << 1) /* supports LTM */
     __le16 wSpeedSupported;
 #define USB_LOW_SPEED_OPERATION     (1)  /* Low speed operation */
 #define USB_FULL_SPEED_OPERATION    (1 << 1) /* Full speed operation */
 #define USB_HIGH_SPEED_OPERATION    (1 << 2) /* High speed operation */
 #define USB_5GBPS_OPERATION     (1 << 3) /* Operation at 5Gbps */
     __u8  bFunctionalitySupport;
     __u8  bU1devExitLat;
     __le16 bU2DevExitLat;
 } __attribute__((packed));
 
 #define USB_DT_USB_SS_CAP_SIZE  10
 
 /*
  * Container ID Capability descriptor: Defines the instance unique ID used to
  * identify the instance across all operating modes
  */
 #define CONTAINER_ID_TYPE   4
 struct usb_ss_container_id_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
     __u8  bDevCapabilityType;
     __u8  bReserved;
     __u8  ContainerID[16]; /* 128-bit number */
 } __attribute__((packed));
 
 #define USB_DT_USB_SS_CONTN_ID_SIZE 20
 
 /*
  * SuperSpeed Plus USB Capability descriptor: Defines the set of
  * SuperSpeed Plus USB specific device level capabilities
  */
 #define USB_SSP_CAP_TYPE    0xa
 struct usb_ssp_cap_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
     __u8  bDevCapabilityType;
     __u8  bReserved;
     __le32 bmAttributes;
 #define USB_SSP_SUBLINK_SPEED_ATTRIBS   (0x1f << 0) /* sublink speed entries */
 #define USB_SSP_SUBLINK_SPEED_IDS   (0xf << 5)  /* speed ID entries */
     __le16  wFunctionalitySupport;
 #define USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID  (0xf)
 #define USB_SSP_MIN_RX_LANE_COUNT       (0xf << 8)
 #define USB_SSP_MIN_TX_LANE_COUNT       (0xf << 12)
     __le16 wReserved;
     __le32 bmSublinkSpeedAttr[1]; /* list of sublink speed attrib entries */
 #define USB_SSP_SUBLINK_SPEED_SSID  (0xf)       /* sublink speed ID */
 #define USB_SSP_SUBLINK_SPEED_LSE   (0x3 << 4)  /* Lanespeed exponent */
 #define USB_SSP_SUBLINK_SPEED_LSE_BPS       0
 #define USB_SSP_SUBLINK_SPEED_LSE_KBPS      1
 #define USB_SSP_SUBLINK_SPEED_LSE_MBPS      2
 #define USB_SSP_SUBLINK_SPEED_LSE_GBPS      3
 
 #define USB_SSP_SUBLINK_SPEED_ST    (0x3 << 6)  /* Sublink type */
 #define USB_SSP_SUBLINK_SPEED_ST_SYM_RX     0
 #define USB_SSP_SUBLINK_SPEED_ST_ASYM_RX    1
 #define USB_SSP_SUBLINK_SPEED_ST_SYM_TX     2
 #define USB_SSP_SUBLINK_SPEED_ST_ASYM_TX    3
 
 #define USB_SSP_SUBLINK_SPEED_RSVD  (0x3f << 8) /* Reserved */
 #define USB_SSP_SUBLINK_SPEED_LP    (0x3 << 14) /* Link protocol */
 #define USB_SSP_SUBLINK_SPEED_LP_SS     0
 #define USB_SSP_SUBLINK_SPEED_LP_SSP        1
 
 #define USB_SSP_SUBLINK_SPEED_LSM   (0xff << 16)    /* Lanespeed mantissa */
 } __attribute__((packed));
 
 /*
  * USB Power Delivery Capability Descriptor:
  * Defines capabilities for PD
  */
 /* Defines the various PD Capabilities of this device */
 #define USB_PD_POWER_DELIVERY_CAPABILITY    0x06
 /* Provides information on each battery supported by the device */
 #define USB_PD_BATTERY_INFO_CAPABILITY      0x07
 /* The Consumer characteristics of a Port on the device */
 #define USB_PD_PD_CONSUMER_PORT_CAPABILITY  0x08
 /* The provider characteristics of a Port on the device */
 #define USB_PD_PD_PROVIDER_PORT_CAPABILITY  0x09
 
 struct usb_pd_cap_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
     __u8  bDevCapabilityType; /* set to USB_PD_POWER_DELIVERY_CAPABILITY */
     __u8  bReserved;
     __le32 bmAttributes;
 #define USB_PD_CAP_BATTERY_CHARGING (1 << 1) /* supports Battery Charging specification */
 #define USB_PD_CAP_USB_PD       (1 << 2) /* supports USB Power Delivery specification */
 #define USB_PD_CAP_PROVIDER     (1 << 3) /* can provide power */
 #define USB_PD_CAP_CONSUMER     (1 << 4) /* can consume power */
 #define USB_PD_CAP_CHARGING_POLICY  (1 << 5) /* supports CHARGING_POLICY feature */
 #define USB_PD_CAP_TYPE_C_CURRENT   (1 << 6) /* supports power capabilities defined in the USB Type-C Specification */
 
 #define USB_PD_CAP_PWR_AC       (1 << 8)
 #define USB_PD_CAP_PWR_BAT      (1 << 9)
 #define USB_PD_CAP_PWR_USE_V_BUS    (1 << 14)
 
     __le16 bmProviderPorts; /* Bit zero refers to the UFP of the device */
     __le16 bmConsumerPorts;
     __le16 bcdBCVersion;
     __le16 bcdPDVersion;
     __le16 bcdUSBTypeCVersion;
 } __attribute__((packed));
 
 struct usb_pd_cap_battery_info_descriptor {
     __u8 bLength;
     __u8 bDescriptorType;
     __u8 bDevCapabilityType;
     /* Index of string descriptor shall contain the user friendly name for this battery */
     __u8 iBattery;
     /* Index of string descriptor shall contain the Serial Number String for this battery */
     __u8 iSerial;
     __u8 iManufacturer;
     __u8 bBatteryId; /* uniquely identifies this battery in status Messages */
     __u8 bReserved;
     /*
      * Shall contain the Battery Charge value above which this
      * battery is considered to be fully charged but not necessarily
      * “topped off.”
      */
     __le32 dwChargedThreshold; /* in mWh */
     /*
      * Shall contain the minimum charge level of this battery such
      * that above this threshold, a device can be assured of being
      * able to power up successfully (see Battery Charging 1.2).
      */
     __le32 dwWeakThreshold; /* in mWh */
     __le32 dwBatteryDesignCapacity; /* in mWh */
     __le32 dwBatteryLastFullchargeCapacity; /* in mWh */
 } __attribute__((packed));
 
 struct usb_pd_cap_consumer_port_descriptor {
     __u8 bLength;
     __u8 bDescriptorType;
     __u8 bDevCapabilityType;
     __u8 bReserved;
     __u8 bmCapabilities;
 /* port will oerate under: */
 #define USB_PD_CAP_CONSUMER_BC      (1 << 0) /* BC */
 #define USB_PD_CAP_CONSUMER_PD      (1 << 1) /* PD */
 #define USB_PD_CAP_CONSUMER_TYPE_C  (1 << 2) /* USB Type-C Current */
     __le16 wMinVoltage; /* in 50mV units */
     __le16 wMaxVoltage; /* in 50mV units */
     __u16 wReserved;
     __le32 dwMaxOperatingPower; /* in 10 mW - operating at steady state */
     __le32 dwMaxPeakPower; /* in 10mW units - operating at peak power */
     __le32 dwMaxPeakPowerTime; /* in 100ms units - duration of peak */
 #define USB_PD_CAP_CONSUMER_UNKNOWN_PEAK_POWER_TIME 0xffff
 } __attribute__((packed));
 
 struct usb_pd_cap_provider_port_descriptor {
     __u8 bLength;
     __u8 bDescriptorType;
     __u8 bDevCapabilityType;
     __u8 bReserved1;
     __u8 bmCapabilities;
 /* port will oerate under: */
 #define USB_PD_CAP_PROVIDER_BC      (1 << 0) /* BC */
 #define USB_PD_CAP_PROVIDER_PD      (1 << 1) /* PD */
 #define USB_PD_CAP_PROVIDER_TYPE_C  (1 << 2) /* USB Type-C Current */
     __u8 bNumOfPDObjects;
     __u8 bReserved2;
     __le32 wPowerDataObject[];
 } __attribute__((packed));
 
 /*
  * Precision time measurement capability descriptor: advertised by devices and
  * hubs that support PTM
  */
 #define USB_PTM_CAP_TYPE    0xb
 struct usb_ptm_cap_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
     __u8  bDevCapabilityType;
 } __attribute__((packed));
 
 #define USB_DT_USB_PTM_ID_SIZE      3
 /*
  * The size of the descriptor for the Sublink Speed Attribute Count
  * (SSAC) specified in bmAttributes[4:0]. SSAC is zero-based
  */
 #define USB_DT_USB_SSP_CAP_SIZE(ssac)   (12 + (ssac + 1) * 4)
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_WIRELESS_ENDPOINT_COMP:  companion descriptor associated with
  * each endpoint descriptor for a wireless device
  */
 struct usb_wireless_ep_comp_descriptor {
     __u8  bLength;
     __u8  bDescriptorType;
 
     __u8  bMaxBurst;
     __u8  bMaxSequence;
     __le16 wMaxStreamDelay;
     __le16 wOverTheAirPacketSize;
     __u8  bOverTheAirInterval;
     __u8  bmCompAttributes;
 #define USB_ENDPOINT_SWITCH_MASK    0x03    /* in bmCompAttributes */
 #define USB_ENDPOINT_SWITCH_NO      0
 #define USB_ENDPOINT_SWITCH_SWITCH  1
 #define USB_ENDPOINT_SWITCH_SCALE   2
 } __attribute__((packed));
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
  * host and a device for connection set up, mutual authentication, and
  * exchanging short lived session keys.  The handshake depends on a CC.
  */
 struct usb_handshake {
     __u8 bMessageNumber;
     __u8 bStatus;
     __u8 tTKID[3];
     __u8 bReserved;
     __u8 CDID[16];
     __u8 nonce[16];
     __u8 MIC[8];
 } __attribute__((packed));
 
 /*-------------------------------------------------------------------------*/
 
 /* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
  * A CC may also be set up using non-wireless secure channels (including
  * wired USB!), and some devices may support CCs with multiple hosts.
  */
 struct usb_connection_context {
     __u8 CHID[16];      /* persistent host id */
     __u8 CDID[16];      /* device id (unique w/in host context) */
     __u8 CK[16];        /* connection key */
 } __attribute__((packed));
 
 /*-------------------------------------------------------------------------*/
 
 /* USB 2.0 defines three speeds, here's how Linux identifies them */
 
 enum usb_device_speed {
     USB_SPEED_UNKNOWN = 0,          /* enumerating */
     USB_SPEED_LOW, USB_SPEED_FULL,      /* usb 1.1 */
     USB_SPEED_HIGH,             /* usb 2.0 */
     USB_SPEED_WIRELESS,         /* wireless (usb 2.5) */
     USB_SPEED_SUPER,            /* usb 3.0 */
     USB_SPEED_SUPER_PLUS,           /* usb 3.1 */
 };
 
 
 enum usb_device_state {
     /* NOTATTACHED isn't in the USB spec, and this state acts
      * the same as ATTACHED ... but it's clearer this way.
      */
     USB_STATE_NOTATTACHED = 0,
 
     /* chapter 9 and authentication (wireless) device states */
     USB_STATE_ATTACHED,
     USB_STATE_POWERED,          /* wired */
     USB_STATE_RECONNECTING,         /* auth */
     USB_STATE_UNAUTHENTICATED,      /* auth */
     USB_STATE_DEFAULT,          /* limited function */
     USB_STATE_ADDRESS,
     USB_STATE_CONFIGURED,           /* most functions */
 
     USB_STATE_SUSPENDED
 
     /* NOTE:  there are actually four different SUSPENDED
      * states, returning to POWERED, DEFAULT, ADDRESS, or
      * CONFIGURED respectively when SOF tokens flow again.
      * At this level there's no difference between L1 and L2
      * suspend states.  (L2 being original USB 1.1 suspend.)
      */
 };
 
 enum usb3_link_state {
     USB3_LPM_U0 = 0,
     USB3_LPM_U1,
     USB3_LPM_U2,
     USB3_LPM_U3
 };
 
 /*
  * A U1 timeout of 0x0 means the parent hub will reject any transitions to U1.
  * 0xff means the parent hub will accept transitions to U1, but will not
  * initiate a transition.
  *
  * A U1 timeout of 0x1 to 0x7F also causes the hub to initiate a transition to
  * U1 after that many microseconds.  Timeouts of 0x80 to 0xFE are reserved
  * values.
  *
  * A U2 timeout of 0x0 means the parent hub will reject any transitions to U2.
  * 0xff means the parent hub will accept transitions to U2, but will not
  * initiate a transition.
  *
  * A U2 timeout of 0x1 to 0xFE also causes the hub to initiate a transition to
  * U2 after N*256 microseconds.  Therefore a U2 timeout value of 0x1 means a U2
  * idle timer of 256 microseconds, 0x2 means 512 microseconds, 0xFE means
  * 65.024ms.
  */
 #define USB3_LPM_DISABLED       0x0
 #define USB3_LPM_U1_MAX_TIMEOUT     0x7F
 #define USB3_LPM_U2_MAX_TIMEOUT     0xFE
 #define USB3_LPM_DEVICE_INITIATED   0xFF
 
 struct usb_set_sel_req {
     __u8    u1_sel;
     __u8    u1_pel;
     __le16  u2_sel;
     __le16  u2_pel;
 } __attribute__ ((packed));
 
 /*
  * The Set System Exit Latency control transfer provides one byte each for
  * U1 SEL and U1 PEL, so the max exit latency is 0xFF.  U2 SEL and U2 PEL each
  * are two bytes long.
  */
 #define USB3_LPM_MAX_U1_SEL_PEL     0xFF
 #define USB3_LPM_MAX_U2_SEL_PEL     0xFFFF
 
 /*-------------------------------------------------------------------------*/
 
 /*
  * As per USB compliance update, a device that is actively drawing
  * more than 100mA from USB must report itself as bus-powered in
  * the GetStatus(DEVICE) call.
  * https://compliance.usb.org/index.asp?UpdateFile=Electrical&Format=Standard#34
  */
 #define USB_SELF_POWER_VBUS_MAX_DRAW        100
 
 #endif /* _UAPI__LINUX_USB_CH9_H */

This page was automatically generated by the 2.1.0 LXR engine. The LXR team