Quelle ch9.h
Sprache: C
/* 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 spec ( now defunct ) . 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 .
*
* 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 0 x80 /* to host */
/*
* USB types , the second of three bRequestType fields
*/
#define USB_TYPE_MASK (0 x03 << 5 )
#define USB_TYPE_STANDARD (0 x00 << 5 )
#define USB_TYPE_CLASS (0 x01 << 5 )
#define USB_TYPE_VENDOR (0 x02 << 5 )
#define USB_TYPE_RESERVED (0 x03 << 5 )
/*
* USB recipients , the third of three bRequestType fields
*/
#define USB_RECIP_MASK 0 x1f
#define USB_RECIP_DEVICE 0 x00
#define USB_RECIP_INTERFACE 0 x01
#define USB_RECIP_ENDPOINT 0 x02
#define USB_RECIP_OTHER 0 x03
/* From Wireless USB 1.0 */
#define USB_RECIP_PORT 0 x04
#define USB_RECIP_RPIPE 0 x05
/*
* 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 0 x00
#define USB_REQ_CLEAR_FEATURE 0 x01
#define USB_REQ_SET_FEATURE 0 x03
#define USB_REQ_SET_ADDRESS 0 x05
#define USB_REQ_GET_DESCRIPTOR 0 x06
#define USB_REQ_SET_DESCRIPTOR 0 x07
#define USB_REQ_GET_CONFIGURATION 0 x08
#define USB_REQ_SET_CONFIGURATION 0 x09
#define USB_REQ_GET_INTERFACE 0 x0A
#define USB_REQ_SET_INTERFACE 0 x0B
#define USB_REQ_SYNCH_FRAME 0 x0C
#define USB_REQ_SET_SEL 0 x30
#define USB_REQ_SET_ISOCH_DELAY 0 x31
#define USB_REQ_SET_ENCRYPTION 0 x0D /* Wireless USB */
#define USB_REQ_GET_ENCRYPTION 0 x0E
#define USB_REQ_RPIPE_ABORT 0 x0E
#define USB_REQ_SET_HANDSHAKE 0 x0F
#define USB_REQ_RPIPE_RESET 0 x0F
#define USB_REQ_GET_HANDSHAKE 0 x10
#define USB_REQ_SET_CONNECTION 0 x11
#define USB_REQ_SET_SECURITY_DATA 0 x12
#define USB_REQ_GET_SECURITY_DATA 0 x13
#define USB_REQ_SET_WUSB_DATA 0 x14
#define USB_REQ_LOOPBACK_DATA_WRITE 0 x15
#define USB_REQ_LOOPBACK_DATA_READ 0 x16
#define USB_REQ_SET_INTERFACE_DS 0 x17
/* 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 0 xFF00
/*
* 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 0 x01
#define USB_DT_CONFIG 0 x02
#define USB_DT_STRING 0 x03
#define USB_DT_INTERFACE 0 x04
#define USB_DT_ENDPOINT 0 x05
#define USB_DT_DEVICE_QUALIFIER 0 x06
#define USB_DT_OTHER_SPEED_CONFIG 0 x07
#define USB_DT_INTERFACE_POWER 0 x08
/* these are from a minor usb 2.0 revision (ECN) */
#define USB_DT_OTG 0 x09
#define USB_DT_DEBUG 0 x0a
#define USB_DT_INTERFACE_ASSOCIATION 0 x0b
/* these are from the Wireless USB spec */
#define USB_DT_SECURITY 0 x0c
#define USB_DT_KEY 0 x0d
#define USB_DT_ENCRYPTION_TYPE 0 x0e
#define USB_DT_BOS 0 x0f
#define USB_DT_DEVICE_CAPABILITY 0 x10
#define USB_DT_WIRELESS_ENDPOINT_COMP 0 x11
/* From the eUSB2 spec */
#define USB_DT_EUSB2_ISOC_ENDPOINT_COMP 0 x12
/* From Wireless USB spec */
#define USB_DT_WIRE_ADAPTER 0 x21
/* From USB Device Firmware Upgrade Specification, Revision 1.1 */
#define USB_DT_DFU_FUNCTIONAL 0 x21
/* these are from the Wireless USB spec */
#define USB_DT_RPIPE 0 x22
#define USB_DT_CS_RADIO_CONTROL 0 x23
/* From the T10 UAS specification */
#define USB_DT_PIPE_USAGE 0 x24
/* From the USB 3.0 spec */
#define USB_DT_SS_ENDPOINT_COMP 0 x30
/* From the USB 3.1 spec */
#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0 x31
/* 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 0 x0a
#define USB_CLASS_CSCID 0 x0b /* chip+ smart card */
#define USB_CLASS_CONTENT_SEC 0 x0d /* content security */
#define USB_CLASS_VIDEO 0 x0e
#define USB_CLASS_WIRELESS_CONTROLLER 0 xe0
#define USB_CLASS_PERSONAL_HEALTHCARE 0 x0f
#define USB_CLASS_AUDIO_VIDEO 0 x10
#define USB_CLASS_BILLBOARD 0 x11
#define USB_CLASS_USB_TYPE_C_BRIDGE 0 x12
#define USB_CLASS_MCTP 0 x14
#define USB_CLASS_MISC 0 xef
#define USB_CLASS_APP_SPEC 0 xfe
#define USB_SUBCLASS_DFU 0 x01
#define USB_CLASS_VENDOR_SPEC 0 xff
#define USB_SUBCLASS_VENDOR_SPEC 0 xff
/*-------------------------------------------------------------------------*/
/* 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;
union {
__le16 legacy_padding;
__DECLARE_FLEX_ARRAY(__le16, wData); /* 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 0 x0f /* in bEndpointAddress */
#define USB_ENDPOINT_DIR_MASK 0 x80
#define USB_ENDPOINT_XFERTYPE_MASK 0 x03 /* 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 0 x80
#define USB_ENDPOINT_MAXP_MASK 0 x07ff
#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 0 x30
#define USB_ENDPOINT_INTR_PERIODIC (0 << 4 )
#define USB_ENDPOINT_INTR_NOTIFICATION (1 << 4 )
#define USB_ENDPOINT_SYNCTYPE 0 x0c
#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 0 x30
#define USB_ENDPOINT_USAGE_DATA 0 x00
#define USB_ENDPOINT_USAGE_FEEDBACK 0 x10
#define USB_ENDPOINT_USAGE_IMPLICIT_FB 0 x20 /* 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_EUSB2_ISOC_ENDPOINT_COMP: eUSB2 Isoch Endpoint Companion descriptor */
struct usb_eusb2_isoc_ep_comp_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__le16 wMaxPacketSize;
__le32 dwBytesPerInterval;
} __attribute__ ((packed));
#define USB_DT_EUSB2_ISOC_EP_COMP_SIZE 8
/*-------------------------------------------------------------------------*/
/* 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 & 0 x1f;
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) & 0 x3))
/* 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 0200 H )
*/
} __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 */
/* OTG 3.0 */
#define USB_OTG_RSP (1 << 3 ) /* support RSP */
#define OTG_STS_SELECTOR 0 xF000 /* 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) & 0 xf) << 8 )
#define USB_SET_BESL_DEEP(p) (((p) & 0 xf) << 12 )
#define USB_GET_BESL_BASELINE(p) (((p) & (0 xf << 8 )) >> 8 )
#define USB_GET_BESL_DEEP(p) (((p) & (0 xf << 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
/*
* Platform Device Capability descriptor : Defines platform specific device
* capabilities
*/
#define USB_PLAT_DEV_CAP_TYPE 5
struct usb_plat_dev_cap_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDevCapabilityType;
__u8 bReserved;
__u8 UUID[16 ];
__u8 CapabilityData[];
} __attribute__((packed));
#define USB_DT_USB_PLAT_DEV_CAP_SIZE(capability_data_size) (20 + capability_data_size)
/*
* SuperSpeed Plus USB Capability descriptor : Defines the set of
* SuperSpeed Plus USB specific device level capabilities
*/
#define USB_SSP_CAP_TYPE 0 xa
struct usb_ssp_cap_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDevCapabilityType;
__u8 bReserved;
__le32 bmAttributes;
#define USB_SSP_SUBLINK_SPEED_ATTRIBS (0 x1f << 0 ) /* sublink speed entries */
#define USB_SSP_SUBLINK_SPEED_IDS (0 xf << 5 ) /* speed ID entries */
__le16 wFunctionalitySupport;
#define USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID (0 xf)
#define USB_SSP_MIN_RX_LANE_COUNT (0 xf << 8 )
#define USB_SSP_MIN_TX_LANE_COUNT (0 xf << 12 )
__le16 wReserved;
union {
__le32 legacy_padding;
/* list of sublink speed attrib entries */
__DECLARE_FLEX_ARRAY(__le32, bmSublinkSpeedAttr);
};
#define USB_SSP_SUBLINK_SPEED_SSID (0 xf) /* sublink speed ID */
#define USB_SSP_SUBLINK_SPEED_LSE (0 x3 << 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 (0 x3 << 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 (0 x3f << 8 ) /* Reserved */
#define USB_SSP_SUBLINK_SPEED_LP (0 x3 << 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 (0 xff << 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 0 x06
/* Provides information on each battery supported by the device */
#define USB_PD_BATTERY_INFO_CAPABILITY 0 x07
/* The Consumer characteristics of a Port on the device */
#define USB_PD_PD_CONSUMER_PORT_CAPABILITY 0 x08
/* The provider characteristics of a Port on the device */
#define USB_PD_PD_PROVIDER_PORT_CAPABILITY 0 x09
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 0 xffff
} __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 0 xb
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 0 x03 /* 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 0 x0 means the parent hub will reject any transitions to U1 .
* 0 xff means the parent hub will accept transitions to U1 , but will not
* initiate a transition .
*
* A U1 timeout of 0 x1 to 0 x7F also causes the hub to initiate a transition to
* U1 after that many microseconds . Timeouts of 0 x80 to 0 xFE are reserved
* values .
*
* A U2 timeout of 0 x0 means the parent hub will reject any transitions to U2 .
* 0 xff means the parent hub will accept transitions to U2 , but will not
* initiate a transition .
*
* A U2 timeout of 0 x1 to 0 xFE also causes the hub to initiate a transition to
* U2 after N * 256 microseconds . Therefore a U2 timeout value of 0 x1 means a U2
* idle timer of 256 microseconds , 0 x2 means 512 microseconds , 0 xFE means
* 65 . 024 ms .
*/
#define USB3_LPM_DISABLED 0 x0
#define USB3_LPM_U1_MAX_TIMEOUT 0 x7F
#define USB3_LPM_U2_MAX_TIMEOUT 0 xFE
#define USB3_LPM_DEVICE_INITIATED 0 xFF
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 0 xFF . U2 SEL and U2 PEL each
* are two bytes long .
*/
#define USB3_LPM_MAX_U1_SEL_PEL 0 xFF
#define USB3_LPM_MAX_U2_SEL_PEL 0 xFFFF
/*-------------------------------------------------------------------------*/
/*
* As per USB compliance update , a device that is actively drawing
* more than 100 mA 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 */
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