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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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c02c4bb205
Another hook needed for wireless USB: there are states associated with the device authentication protocol. Wireless devices must authenticate using the host system's keystore. Note that wired connections could also use this authentication protocol, if for no other reason than to support the most secure "simple" key exchange protocols for wireless devices. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
555 lines
16 KiB
C
555 lines
16 KiB
C
/*
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* This file holds USB constants and structures that are needed for USB
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* device APIs. These are used by the USB device model, which is defined
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* in chapter 9 of the USB 2.0 specification. Linux has several APIs in C
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* that need these:
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*
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* - the master/host side Linux-USB kernel driver API;
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* - the "usbfs" user space API; and
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* - the Linux "gadget" slave/device/peripheral side driver API.
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*
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* USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
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* act either as a USB master/host or as a USB slave/device. That means
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* the master and slave side APIs benefit from working well together.
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*
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* There's also "Wireless USB", using low power short range radios for
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* peripheral interconnection but otherwise building on the USB framework.
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*/
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#ifndef __LINUX_USB_CH9_H
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#define __LINUX_USB_CH9_H
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#include <linux/types.h> /* __u8 etc */
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/*-------------------------------------------------------------------------*/
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/* CONTROL REQUEST SUPPORT */
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/*
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* USB directions
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*
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* This bit flag is used in endpoint descriptors' bEndpointAddress field.
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* It's also one of three fields in control requests bRequestType.
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*/
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#define USB_DIR_OUT 0 /* to device */
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#define USB_DIR_IN 0x80 /* to host */
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/*
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* USB types, the second of three bRequestType fields
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*/
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#define USB_TYPE_MASK (0x03 << 5)
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#define USB_TYPE_STANDARD (0x00 << 5)
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#define USB_TYPE_CLASS (0x01 << 5)
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#define USB_TYPE_VENDOR (0x02 << 5)
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#define USB_TYPE_RESERVED (0x03 << 5)
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/*
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* USB recipients, the third of three bRequestType fields
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*/
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#define USB_RECIP_MASK 0x1f
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#define USB_RECIP_DEVICE 0x00
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#define USB_RECIP_INTERFACE 0x01
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#define USB_RECIP_ENDPOINT 0x02
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#define USB_RECIP_OTHER 0x03
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/*
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* Standard requests, for the bRequest field of a SETUP packet.
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*
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* These are qualified by the bRequestType field, so that for example
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* TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
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* by a GET_STATUS request.
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*/
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#define USB_REQ_GET_STATUS 0x00
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#define USB_REQ_CLEAR_FEATURE 0x01
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#define USB_REQ_SET_FEATURE 0x03
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#define USB_REQ_SET_ADDRESS 0x05
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#define USB_REQ_GET_DESCRIPTOR 0x06
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#define USB_REQ_SET_DESCRIPTOR 0x07
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#define USB_REQ_GET_CONFIGURATION 0x08
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#define USB_REQ_SET_CONFIGURATION 0x09
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#define USB_REQ_GET_INTERFACE 0x0A
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#define USB_REQ_SET_INTERFACE 0x0B
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#define USB_REQ_SYNCH_FRAME 0x0C
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#define USB_REQ_SET_ENCRYPTION 0x0D /* Wireless USB */
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#define USB_REQ_GET_ENCRYPTION 0x0E
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#define USB_REQ_SET_HANDSHAKE 0x0F
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#define USB_REQ_GET_HANDSHAKE 0x10
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#define USB_REQ_SET_CONNECTION 0x11
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#define USB_REQ_SET_SECURITY_DATA 0x12
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#define USB_REQ_GET_SECURITY_DATA 0x13
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#define USB_REQ_SET_WUSB_DATA 0x14
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#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
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#define USB_REQ_LOOPBACK_DATA_READ 0x16
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#define USB_REQ_SET_INTERFACE_DS 0x17
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/*
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* USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
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* are read as a bit array returned by USB_REQ_GET_STATUS. (So there
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* are at most sixteen features of each type.)
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*/
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#define USB_DEVICE_SELF_POWERED 0 /* (read only) */
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#define USB_DEVICE_REMOTE_WAKEUP 1 /* dev may initiate wakeup */
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#define USB_DEVICE_TEST_MODE 2 /* (wired high speed only) */
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#define USB_DEVICE_BATTERY 2 /* (wireless) */
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#define USB_DEVICE_B_HNP_ENABLE 3 /* (otg) dev may initiate HNP */
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#define USB_DEVICE_WUSB_DEVICE 3 /* (wireless)*/
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#define USB_DEVICE_A_HNP_SUPPORT 4 /* (otg) RH port supports HNP */
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#define USB_DEVICE_A_ALT_HNP_SUPPORT 5 /* (otg) other RH port does */
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#define USB_DEVICE_DEBUG_MODE 6 /* (special devices only) */
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#define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */
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/**
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* struct usb_ctrlrequest - SETUP data for a USB device control request
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* @bRequestType: matches the USB bmRequestType field
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* @bRequest: matches the USB bRequest field
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* @wValue: matches the USB wValue field (le16 byte order)
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* @wIndex: matches the USB wIndex field (le16 byte order)
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* @wLength: matches the USB wLength field (le16 byte order)
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*
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* This structure is used to send control requests to a USB device. It matches
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* the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the
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* USB spec for a fuller description of the different fields, and what they are
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* used for.
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*
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* Note that the driver for any interface can issue control requests.
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* For most devices, interfaces don't coordinate with each other, so
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* such requests may be made at any time.
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*/
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struct usb_ctrlrequest {
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__u8 bRequestType;
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__u8 bRequest;
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__le16 wValue;
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__le16 wIndex;
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__le16 wLength;
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} __attribute__ ((packed));
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/*-------------------------------------------------------------------------*/
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/*
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* STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
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* (rarely) accepted by SET_DESCRIPTOR.
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*
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* Note that all multi-byte values here are encoded in little endian
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* byte order "on the wire". But when exposed through Linux-USB APIs,
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* they've been converted to cpu byte order.
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*/
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/*
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* Descriptor types ... USB 2.0 spec table 9.5
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*/
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#define USB_DT_DEVICE 0x01
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#define USB_DT_CONFIG 0x02
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#define USB_DT_STRING 0x03
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#define USB_DT_INTERFACE 0x04
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#define USB_DT_ENDPOINT 0x05
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#define USB_DT_DEVICE_QUALIFIER 0x06
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#define USB_DT_OTHER_SPEED_CONFIG 0x07
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#define USB_DT_INTERFACE_POWER 0x08
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/* these are from a minor usb 2.0 revision (ECN) */
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#define USB_DT_OTG 0x09
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#define USB_DT_DEBUG 0x0a
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#define USB_DT_INTERFACE_ASSOCIATION 0x0b
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/* these are from the Wireless USB spec */
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#define USB_DT_SECURITY 0x0c
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#define USB_DT_KEY 0x0d
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#define USB_DT_ENCRYPTION_TYPE 0x0e
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#define USB_DT_BOS 0x0f
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#define USB_DT_DEVICE_CAPABILITY 0x10
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#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
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/* conventional codes for class-specific descriptors */
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#define USB_DT_CS_DEVICE 0x21
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#define USB_DT_CS_CONFIG 0x22
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#define USB_DT_CS_STRING 0x23
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#define USB_DT_CS_INTERFACE 0x24
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#define USB_DT_CS_ENDPOINT 0x25
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/* All standard descriptors have these 2 fields at the beginning */
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struct usb_descriptor_header {
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__u8 bLength;
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__u8 bDescriptorType;
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} __attribute__ ((packed));
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/*-------------------------------------------------------------------------*/
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/* USB_DT_DEVICE: Device descriptor */
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struct usb_device_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__le16 bcdUSB;
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__u8 bDeviceClass;
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__u8 bDeviceSubClass;
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__u8 bDeviceProtocol;
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__u8 bMaxPacketSize0;
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__le16 idVendor;
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__le16 idProduct;
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__le16 bcdDevice;
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__u8 iManufacturer;
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__u8 iProduct;
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__u8 iSerialNumber;
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__u8 bNumConfigurations;
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} __attribute__ ((packed));
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#define USB_DT_DEVICE_SIZE 18
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/*
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* Device and/or Interface Class codes
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* as found in bDeviceClass or bInterfaceClass
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* and defined by www.usb.org documents
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*/
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#define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
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#define USB_CLASS_AUDIO 1
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#define USB_CLASS_COMM 2
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#define USB_CLASS_HID 3
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#define USB_CLASS_PHYSICAL 5
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#define USB_CLASS_STILL_IMAGE 6
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#define USB_CLASS_PRINTER 7
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#define USB_CLASS_MASS_STORAGE 8
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#define USB_CLASS_HUB 9
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#define USB_CLASS_CDC_DATA 0x0a
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#define USB_CLASS_CSCID 0x0b /* chip+ smart card */
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#define USB_CLASS_CONTENT_SEC 0x0d /* content security */
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#define USB_CLASS_VIDEO 0x0e
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#define USB_CLASS_WIRELESS_CONTROLLER 0xe0
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#define USB_CLASS_APP_SPEC 0xfe
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#define USB_CLASS_VENDOR_SPEC 0xff
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/*-------------------------------------------------------------------------*/
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/* USB_DT_CONFIG: Configuration descriptor information.
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*
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* USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
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* descriptor type is different. Highspeed-capable devices can look
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* different depending on what speed they're currently running. Only
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* devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
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* descriptors.
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*/
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struct usb_config_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__le16 wTotalLength;
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__u8 bNumInterfaces;
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__u8 bConfigurationValue;
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__u8 iConfiguration;
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__u8 bmAttributes;
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__u8 bMaxPower;
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} __attribute__ ((packed));
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#define USB_DT_CONFIG_SIZE 9
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/* from config descriptor bmAttributes */
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#define USB_CONFIG_ATT_ONE (1 << 7) /* must be set */
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#define USB_CONFIG_ATT_SELFPOWER (1 << 6) /* self powered */
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#define USB_CONFIG_ATT_WAKEUP (1 << 5) /* can wakeup */
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#define USB_CONFIG_ATT_BATTERY (1 << 4) /* battery powered */
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/*-------------------------------------------------------------------------*/
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/* USB_DT_STRING: String descriptor */
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struct usb_string_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__le16 wData[1]; /* UTF-16LE encoded */
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} __attribute__ ((packed));
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/* note that "string" zero is special, it holds language codes that
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* the device supports, not Unicode characters.
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*/
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/*-------------------------------------------------------------------------*/
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/* USB_DT_INTERFACE: Interface descriptor */
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struct usb_interface_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bInterfaceNumber;
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__u8 bAlternateSetting;
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__u8 bNumEndpoints;
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__u8 bInterfaceClass;
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__u8 bInterfaceSubClass;
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__u8 bInterfaceProtocol;
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__u8 iInterface;
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} __attribute__ ((packed));
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#define USB_DT_INTERFACE_SIZE 9
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/*-------------------------------------------------------------------------*/
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/* USB_DT_ENDPOINT: Endpoint descriptor */
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struct usb_endpoint_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bEndpointAddress;
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__u8 bmAttributes;
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__le16 wMaxPacketSize;
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__u8 bInterval;
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/* NOTE: these two are _only_ in audio endpoints. */
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/* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
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__u8 bRefresh;
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__u8 bSynchAddress;
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} __attribute__ ((packed));
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#define USB_DT_ENDPOINT_SIZE 7
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#define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
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/*
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* Endpoints
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*/
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#define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */
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#define USB_ENDPOINT_DIR_MASK 0x80
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#define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */
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#define USB_ENDPOINT_XFER_CONTROL 0
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#define USB_ENDPOINT_XFER_ISOC 1
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#define USB_ENDPOINT_XFER_BULK 2
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#define USB_ENDPOINT_XFER_INT 3
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#define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
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/*-------------------------------------------------------------------------*/
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/* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
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struct usb_qualifier_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__le16 bcdUSB;
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__u8 bDeviceClass;
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__u8 bDeviceSubClass;
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__u8 bDeviceProtocol;
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__u8 bMaxPacketSize0;
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__u8 bNumConfigurations;
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__u8 bRESERVED;
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} __attribute__ ((packed));
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/*-------------------------------------------------------------------------*/
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/* USB_DT_OTG (from OTG 1.0a supplement) */
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struct usb_otg_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bmAttributes; /* support for HNP, SRP, etc */
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} __attribute__ ((packed));
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/* from usb_otg_descriptor.bmAttributes */
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#define USB_OTG_SRP (1 << 0)
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#define USB_OTG_HNP (1 << 1) /* swap host/device roles */
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/*-------------------------------------------------------------------------*/
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/* USB_DT_DEBUG: for special highspeed devices, replacing serial console */
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struct usb_debug_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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/* bulk endpoints with 8 byte maxpacket */
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__u8 bDebugInEndpoint;
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__u8 bDebugOutEndpoint;
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};
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/*-------------------------------------------------------------------------*/
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/* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
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struct usb_interface_assoc_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bFirstInterface;
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__u8 bInterfaceCount;
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__u8 bFunctionClass;
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__u8 bFunctionSubClass;
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__u8 bFunctionProtocol;
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__u8 iFunction;
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} __attribute__ ((packed));
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/*-------------------------------------------------------------------------*/
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/* USB_DT_SECURITY: group of wireless security descriptors, including
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* encryption types available for setting up a CC/association.
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*/
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struct usb_security_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__le16 wTotalLength;
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__u8 bNumEncryptionTypes;
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};
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/*-------------------------------------------------------------------------*/
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/* USB_DT_KEY: used with {GET,SET}_SECURITY_DATA; only public keys
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* may be retrieved.
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*/
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struct usb_key_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 tTKID[3];
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__u8 bReserved;
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__u8 bKeyData[0];
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};
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/*-------------------------------------------------------------------------*/
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/* USB_DT_ENCRYPTION_TYPE: bundled in DT_SECURITY groups */
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struct usb_encryption_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bEncryptionType;
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#define USB_ENC_TYPE_UNSECURE 0
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#define USB_ENC_TYPE_WIRED 1 /* non-wireless mode */
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#define USB_ENC_TYPE_CCM_1 2 /* aes128/cbc session */
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#define USB_ENC_TYPE_RSA_1 3 /* rsa3072/sha1 auth */
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__u8 bEncryptionValue; /* use in SET_ENCRYPTION */
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__u8 bAuthKeyIndex;
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};
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/*-------------------------------------------------------------------------*/
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/* USB_DT_BOS: group of wireless capabilities */
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struct usb_bos_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__le16 wTotalLength;
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__u8 bNumDeviceCaps;
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};
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/*-------------------------------------------------------------------------*/
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/* USB_DT_DEVICE_CAPABILITY: grouped with BOS */
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struct usb_dev_cap_header {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDevCapabilityType;
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};
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#define USB_CAP_TYPE_WIRELESS_USB 1
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struct usb_wireless_cap_descriptor { /* Ultra Wide Band */
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDevCapabilityType;
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__u8 bmAttributes;
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#define USB_WIRELESS_P2P_DRD (1 << 1)
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#define USB_WIRELESS_BEACON_MASK (3 << 2)
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#define USB_WIRELESS_BEACON_SELF (1 << 2)
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#define USB_WIRELESS_BEACON_DIRECTED (2 << 2)
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#define USB_WIRELESS_BEACON_NONE (3 << 2)
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__le16 wPHYRates; /* bit rates, Mbps */
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#define USB_WIRELESS_PHY_53 (1 << 0) /* always set */
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#define USB_WIRELESS_PHY_80 (1 << 1)
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#define USB_WIRELESS_PHY_107 (1 << 2) /* always set */
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#define USB_WIRELESS_PHY_160 (1 << 3)
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#define USB_WIRELESS_PHY_200 (1 << 4) /* always set */
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#define USB_WIRELESS_PHY_320 (1 << 5)
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#define USB_WIRELESS_PHY_400 (1 << 6)
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#define USB_WIRELESS_PHY_480 (1 << 7)
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__u8 bmTFITXPowerInfo; /* TFI power levels */
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__u8 bmFFITXPowerInfo; /* FFI power levels */
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__le16 bmBandGroup;
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__u8 bReserved;
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};
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/*-------------------------------------------------------------------------*/
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/* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with
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* each endpoint descriptor for a wireless device
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*/
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struct usb_wireless_ep_comp_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bMaxBurst;
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__u8 bMaxSequence;
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__le16 wMaxStreamDelay;
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__le16 wOverTheAirPacketSize;
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__u8 bOverTheAirInterval;
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__u8 bmCompAttributes;
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#define USB_ENDPOINT_SWITCH_MASK 0x03 /* in bmCompAttributes */
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#define USB_ENDPOINT_SWITCH_NO 0
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#define USB_ENDPOINT_SWITCH_SWITCH 1
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#define USB_ENDPOINT_SWITCH_SCALE 2
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};
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/*-------------------------------------------------------------------------*/
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/* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
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* 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];
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* 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 */
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* 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_VARIABLE, /* wireless (usb 2.5) */
|
|
};
|
|
|
|
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_UNAUTHENTICATED, /* auth */
|
|
USB_STATE_RECONNECTING, /* 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.
|
|
*/
|
|
};
|
|
|
|
#endif /* __LINUX_USB_CH9_H */
|