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  1. /*
  2.  * This file holds USB constants and structures that are needed for
  3.  * USB device APIs.  These are used by the USB device model, which is
  4.  * defined in chapter 9 of the USB 2.0 specification and in the
  5.  * Wireless USB 1.0 (spread around).  Linux has several APIs in C that
  6.  * need these:
  7.  *
  8.  * - the master/host side Linux-USB kernel driver API;
  9.  * - the "usbfs" user space API; and
  10.  * - the Linux "gadget" slave/device/peripheral side driver API.
  11.  *
  12.  * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
  13.  * act either as a USB master/host or as a USB slave/device.  That means
  14.  * the master and slave side APIs benefit from working well together.
  15.  *
  16.  * There's also "Wireless USB", using low power short range radios for
  17.  * peripheral interconnection but otherwise building on the USB framework.
  18.  *
  19.  * Note all descriptors are declared '__attribute__((packed))' so that:
  20.  *
  21.  * [a] they never get padded, either internally (USB spec writers
  22.  *     probably handled that) or externally;
  23.  *
  24.  * [b] so that accessing bigger-than-a-bytes fields will never
  25.  *     generate bus errors on any platform, even when the location of
  26.  *     its descriptor inside a bundle isn't "naturally aligned", and
  27.  *
  28.  * [c] for consistency, removing all doubt even when it appears to
  29.  *     someone that the two other points are non-issues for that
  30.  *     particular descriptor type.
  31.  */
  32.  
  33. #ifndef __LINUX_USB_CH9_H
  34. #define __LINUX_USB_CH9_H
  35.  
  36. #include <linux/types.h>        /* __u8 etc */
  37.  
  38. /*-------------------------------------------------------------------------*/
  39.  
  40. /* CONTROL REQUEST SUPPORT */
  41.  
  42. /*
  43.  * USB directions
  44.  *
  45.  * This bit flag is used in endpoint descriptors' bEndpointAddress field.
  46.  * It's also one of three fields in control requests bRequestType.
  47.  */
  48. #define USB_DIR_OUT                     0               /* to device */
  49. #define USB_DIR_IN                      0x80            /* to host */
  50.  
  51. /*
  52.  * USB types, the second of three bRequestType fields
  53.  */
  54. #define USB_TYPE_MASK                   (0x03 << 5)
  55. #define USB_TYPE_STANDARD               (0x00 << 5)
  56. #define USB_TYPE_CLASS                  (0x01 << 5)
  57. #define USB_TYPE_VENDOR                 (0x02 << 5)
  58. #define USB_TYPE_RESERVED               (0x03 << 5)
  59.  
  60. /*
  61.  * USB recipients, the third of three bRequestType fields
  62.  */
  63. #define USB_RECIP_MASK                  0x1f
  64. #define USB_RECIP_DEVICE                0x00
  65. #define USB_RECIP_INTERFACE             0x01
  66. #define USB_RECIP_ENDPOINT              0x02
  67. #define USB_RECIP_OTHER                 0x03
  68. /* From Wireless USB 1.0 */
  69. #define USB_RECIP_PORT                  0x04
  70. #define USB_RECIP_RPIPE                 0x05
  71.  
  72. /*
  73.  * Standard requests, for the bRequest field of a SETUP packet.
  74.  *
  75.  * These are qualified by the bRequestType field, so that for example
  76.  * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
  77.  * by a GET_STATUS request.
  78.  */
  79. #define USB_REQ_GET_STATUS              0x00
  80. #define USB_REQ_CLEAR_FEATURE           0x01
  81. #define USB_REQ_SET_FEATURE             0x03
  82. #define USB_REQ_SET_ADDRESS             0x05
  83. #define USB_REQ_GET_DESCRIPTOR          0x06
  84. #define USB_REQ_SET_DESCRIPTOR          0x07
  85. #define USB_REQ_GET_CONFIGURATION       0x08
  86. #define USB_REQ_SET_CONFIGURATION       0x09
  87. #define USB_REQ_GET_INTERFACE           0x0A
  88. #define USB_REQ_SET_INTERFACE           0x0B
  89. #define USB_REQ_SYNCH_FRAME             0x0C
  90.  
  91. #define USB_REQ_SET_ENCRYPTION          0x0D    /* Wireless USB */
  92. #define USB_REQ_GET_ENCRYPTION          0x0E
  93. #define USB_REQ_RPIPE_ABORT             0x0E
  94. #define USB_REQ_SET_HANDSHAKE           0x0F
  95. #define USB_REQ_RPIPE_RESET             0x0F
  96. #define USB_REQ_GET_HANDSHAKE           0x10
  97. #define USB_REQ_SET_CONNECTION          0x11
  98. #define USB_REQ_SET_SECURITY_DATA       0x12
  99. #define USB_REQ_GET_SECURITY_DATA       0x13
  100. #define USB_REQ_SET_WUSB_DATA           0x14
  101. #define USB_REQ_LOOPBACK_DATA_WRITE     0x15
  102. #define USB_REQ_LOOPBACK_DATA_READ      0x16
  103. #define USB_REQ_SET_INTERFACE_DS        0x17
  104.  
  105. /*
  106.  * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
  107.  * are read as a bit array returned by USB_REQ_GET_STATUS.  (So there
  108.  * are at most sixteen features of each type.)
  109.  */
  110. #define USB_DEVICE_SELF_POWERED         0       /* (read only) */
  111. #define USB_DEVICE_REMOTE_WAKEUP        1       /* dev may initiate wakeup */
  112. #define USB_DEVICE_TEST_MODE            2       /* (wired high speed only) */
  113. #define USB_DEVICE_BATTERY              2       /* (wireless) */
  114. #define USB_DEVICE_B_HNP_ENABLE         3       /* (otg) dev may initiate HNP */
  115. #define USB_DEVICE_WUSB_DEVICE          3       /* (wireless)*/
  116. #define USB_DEVICE_A_HNP_SUPPORT        4       /* (otg) RH port supports HNP */
  117. #define USB_DEVICE_A_ALT_HNP_SUPPORT    5       /* (otg) other RH port does */
  118. #define USB_DEVICE_DEBUG_MODE           6       /* (special devices only) */
  119.  
  120. #define USB_ENDPOINT_HALT               0       /* IN/OUT will STALL */
  121.  
  122.  
  123. /**
  124.  * struct usb_ctrlrequest - SETUP data for a USB device control request
  125.  * @bRequestType: matches the USB bmRequestType field
  126.  * @bRequest: matches the USB bRequest field
  127.  * @wValue: matches the USB wValue field (le16 byte order)
  128.  * @wIndex: matches the USB wIndex field (le16 byte order)
  129.  * @wLength: matches the USB wLength field (le16 byte order)
  130.  *
  131.  * This structure is used to send control requests to a USB device.  It matches
  132.  * the different fields of the USB 2.0 Spec section 9.3, table 9-2.  See the
  133.  * USB spec for a fuller description of the different fields, and what they are
  134.  * used for.
  135.  *
  136.  * Note that the driver for any interface can issue control requests.
  137.  * For most devices, interfaces don't coordinate with each other, so
  138.  * such requests may be made at any time.
  139.  */
  140. struct usb_ctrlrequest {
  141.         __u8 bRequestType;
  142.         __u8 bRequest;
  143.         __le16 wValue;
  144.         __le16 wIndex;
  145.         __le16 wLength;
  146. } __attribute__ ((packed));
  147.  
  148. /*-------------------------------------------------------------------------*/
  149.  
  150. /*
  151.  * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
  152.  * (rarely) accepted by SET_DESCRIPTOR.
  153.  *
  154.  * Note that all multi-byte values here are encoded in little endian
  155.  * byte order "on the wire".  But when exposed through Linux-USB APIs,
  156.  * they've been converted to cpu byte order.
  157.  */
  158.  
  159. /*
  160.  * Descriptor types ... USB 2.0 spec table 9.5
  161.  */
  162. #define USB_DT_DEVICE                   0x01
  163. #define USB_DT_CONFIG                   0x02
  164. #define USB_DT_STRING                   0x03
  165. #define USB_DT_INTERFACE                0x04
  166. #define USB_DT_ENDPOINT                 0x05
  167. #define USB_DT_DEVICE_QUALIFIER         0x06
  168. #define USB_DT_OTHER_SPEED_CONFIG       0x07
  169. #define USB_DT_INTERFACE_POWER          0x08
  170. /* these are from a minor usb 2.0 revision (ECN) */
  171. #define USB_DT_OTG                      0x09
  172. #define USB_DT_DEBUG                    0x0a
  173. #define USB_DT_INTERFACE_ASSOCIATION    0x0b
  174. /* these are from the Wireless USB spec */
  175. #define USB_DT_SECURITY                 0x0c
  176. #define USB_DT_KEY                      0x0d
  177. #define USB_DT_ENCRYPTION_TYPE          0x0e
  178. #define USB_DT_BOS                      0x0f
  179. #define USB_DT_DEVICE_CAPABILITY        0x10
  180. #define USB_DT_WIRELESS_ENDPOINT_COMP   0x11
  181. #define USB_DT_WIRE_ADAPTER             0x21
  182. #define USB_DT_RPIPE                    0x22
  183.  
  184. /* conventional codes for class-specific descriptors */
  185. #define USB_DT_CS_DEVICE                0x21
  186. #define USB_DT_CS_CONFIG                0x22
  187. #define USB_DT_CS_STRING                0x23
  188. #define USB_DT_CS_INTERFACE             0x24
  189. #define USB_DT_CS_ENDPOINT              0x25
  190.  
  191. /* All standard descriptors have these 2 fields at the beginning */
  192. struct usb_descriptor_header {
  193.         __u8  bLength;
  194.         __u8  bDescriptorType;
  195. } __attribute__ ((packed));
  196.  
  197.  
  198. /*-------------------------------------------------------------------------*/
  199.  
  200. /* USB_DT_DEVICE: Device descriptor */
  201. struct usb_device_descriptor {
  202.         __u8  bLength;
  203.         __u8  bDescriptorType;
  204.  
  205.         __le16 bcdUSB;
  206.         __u8  bDeviceClass;
  207.         __u8  bDeviceSubClass;
  208.         __u8  bDeviceProtocol;
  209.         __u8  bMaxPacketSize0;
  210.         __le16 idVendor;
  211.         __le16 idProduct;
  212.         __le16 bcdDevice;
  213.         __u8  iManufacturer;
  214.         __u8  iProduct;
  215.         __u8  iSerialNumber;
  216.         __u8  bNumConfigurations;
  217. } __attribute__ ((packed));
  218.  
  219. #define USB_DT_DEVICE_SIZE              18
  220.  
  221.  
  222. /*
  223.  * Device and/or Interface Class codes
  224.  * as found in bDeviceClass or bInterfaceClass
  225.  * and defined by www.usb.org documents
  226.  */
  227. #define USB_CLASS_PER_INTERFACE         0       /* for DeviceClass */
  228. #define USB_CLASS_AUDIO                 1
  229. #define USB_CLASS_COMM                  2
  230. #define USB_CLASS_HID                   3
  231. #define USB_CLASS_PHYSICAL              5
  232. #define USB_CLASS_STILL_IMAGE           6
  233. #define USB_CLASS_PRINTER               7
  234. #define USB_CLASS_MASS_STORAGE          8
  235. #define USB_CLASS_HUB                   9
  236. #define USB_CLASS_CDC_DATA              0x0a
  237. #define USB_CLASS_CSCID                 0x0b    /* chip+ smart card */
  238. #define USB_CLASS_CONTENT_SEC           0x0d    /* content security */
  239. #define USB_CLASS_VIDEO                 0x0e
  240. #define USB_CLASS_WIRELESS_CONTROLLER   0xe0
  241. #define USB_CLASS_MISC                  0xef
  242. #define USB_CLASS_APP_SPEC              0xfe
  243. #define USB_CLASS_VENDOR_SPEC           0xff
  244.  
  245. /*-------------------------------------------------------------------------*/
  246.  
  247. /* USB_DT_CONFIG: Configuration descriptor information.
  248.  *
  249.  * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
  250.  * descriptor type is different.  Highspeed-capable devices can look
  251.  * different depending on what speed they're currently running.  Only
  252.  * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
  253.  * descriptors.
  254.  */
  255. struct usb_config_descriptor {
  256.         __u8  bLength;
  257.         __u8  bDescriptorType;
  258.  
  259.         __le16 wTotalLength;
  260.         __u8  bNumInterfaces;
  261.         __u8  bConfigurationValue;
  262.         __u8  iConfiguration;
  263.         __u8  bmAttributes;
  264.         __u8  bMaxPower;
  265. } __attribute__ ((packed));
  266.  
  267. #define USB_DT_CONFIG_SIZE              9
  268.  
  269. /* from config descriptor bmAttributes */
  270. #define USB_CONFIG_ATT_ONE              (1 << 7)        /* must be set */
  271. #define USB_CONFIG_ATT_SELFPOWER        (1 << 6)        /* self powered */
  272. #define USB_CONFIG_ATT_WAKEUP           (1 << 5)        /* can wakeup */
  273. #define USB_CONFIG_ATT_BATTERY          (1 << 4)        /* battery powered */
  274.  
  275. /*-------------------------------------------------------------------------*/
  276.  
  277. /* USB_DT_STRING: String descriptor */
  278. struct usb_string_descriptor {
  279.         __u8  bLength;
  280.         __u8  bDescriptorType;
  281.  
  282.         __le16 wData[1];                /* UTF-16LE encoded */
  283. } __attribute__ ((packed));
  284.  
  285. /* note that "string" zero is special, it holds language codes that
  286.  * the device supports, not Unicode characters.
  287.  */
  288.  
  289. /*-------------------------------------------------------------------------*/
  290.  
  291. /* USB_DT_INTERFACE: Interface descriptor */
  292. struct usb_interface_descriptor {
  293.         __u8  bLength;
  294.         __u8  bDescriptorType;
  295.  
  296.         __u8  bInterfaceNumber;
  297.         __u8  bAlternateSetting;
  298.         __u8  bNumEndpoints;
  299.         __u8  bInterfaceClass;
  300.         __u8  bInterfaceSubClass;
  301.         __u8  bInterfaceProtocol;
  302.         __u8  iInterface;
  303. } __attribute__ ((packed));
  304.  
  305. #define USB_DT_INTERFACE_SIZE           9
  306.  
  307. /*-------------------------------------------------------------------------*/
  308.  
  309. /* USB_DT_ENDPOINT: Endpoint descriptor */
  310. struct usb_endpoint_descriptor {
  311.         __u8  bLength;
  312.         __u8  bDescriptorType;
  313.  
  314.         __u8  bEndpointAddress;
  315.         __u8  bmAttributes;
  316.         __le16 wMaxPacketSize;
  317.         __u8  bInterval;
  318.  
  319.         /* NOTE:  these two are _only_ in audio endpoints. */
  320.         /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
  321.         __u8  bRefresh;
  322.         __u8  bSynchAddress;
  323. } __attribute__ ((packed));
  324.  
  325. #define USB_DT_ENDPOINT_SIZE            7
  326. #define USB_DT_ENDPOINT_AUDIO_SIZE      9       /* Audio extension */
  327.  
  328.  
  329. /*
  330.  * Endpoints
  331.  */
  332. #define USB_ENDPOINT_NUMBER_MASK        0x0f    /* in bEndpointAddress */
  333. #define USB_ENDPOINT_DIR_MASK           0x80
  334.  
  335. #define USB_ENDPOINT_XFERTYPE_MASK      0x03    /* in bmAttributes */
  336. #define USB_ENDPOINT_XFER_CONTROL       0
  337. #define USB_ENDPOINT_XFER_ISOC          1
  338. #define USB_ENDPOINT_XFER_BULK          2
  339. #define USB_ENDPOINT_XFER_INT           3
  340. #define USB_ENDPOINT_MAX_ADJUSTABLE     0x80
  341.  
  342.  
  343. /*-------------------------------------------------------------------------*/
  344.  
  345. /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
  346. struct usb_qualifier_descriptor {
  347.         __u8  bLength;
  348.         __u8  bDescriptorType;
  349.  
  350.         __le16 bcdUSB;
  351.         __u8  bDeviceClass;
  352.         __u8  bDeviceSubClass;
  353.         __u8  bDeviceProtocol;
  354.         __u8  bMaxPacketSize0;
  355.         __u8  bNumConfigurations;
  356.         __u8  bRESERVED;
  357. } __attribute__ ((packed));
  358.  
  359.  
  360. /*-------------------------------------------------------------------------*/
  361.  
  362. /* USB_DT_OTG (from OTG 1.0a supplement) */
  363. struct usb_otg_descriptor {
  364.         __u8  bLength;
  365.         __u8  bDescriptorType;
  366.  
  367.         __u8  bmAttributes;     /* support for HNP, SRP, etc */
  368. } __attribute__ ((packed));
  369.  
  370. /* from usb_otg_descriptor.bmAttributes */
  371. #define USB_OTG_SRP             (1 << 0)
  372. #define USB_OTG_HNP             (1 << 1)        /* swap host/device roles */
  373.  
  374. /*-------------------------------------------------------------------------*/
  375.  
  376. /* USB_DT_DEBUG:  for special highspeed devices, replacing serial console */
  377. struct usb_debug_descriptor {
  378.         __u8  bLength;
  379.         __u8  bDescriptorType;
  380.  
  381.         /* bulk endpoints with 8 byte maxpacket */
  382.         __u8  bDebugInEndpoint;
  383.         __u8  bDebugOutEndpoint;
  384. } __attribute__((packed));
  385.  
  386. /*-------------------------------------------------------------------------*/
  387.  
  388. /* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
  389. struct usb_interface_assoc_descriptor {
  390.         __u8  bLength;
  391.         __u8  bDescriptorType;
  392.  
  393.         __u8  bFirstInterface;
  394.         __u8  bInterfaceCount;
  395.         __u8  bFunctionClass;
  396.         __u8  bFunctionSubClass;
  397.         __u8  bFunctionProtocol;
  398.         __u8  iFunction;
  399. } __attribute__ ((packed));
  400.  
  401.  
  402. /*-------------------------------------------------------------------------*/
  403.  
  404. /* USB_DT_SECURITY:  group of wireless security descriptors, including
  405.  * encryption types available for setting up a CC/association.
  406.  */
  407. struct usb_security_descriptor {
  408.         __u8  bLength;
  409.         __u8  bDescriptorType;
  410.  
  411.         __le16 wTotalLength;
  412.         __u8  bNumEncryptionTypes;
  413. } __attribute__((packed));
  414.  
  415. /*-------------------------------------------------------------------------*/
  416.  
  417. /* USB_DT_KEY:  used with {GET,SET}_SECURITY_DATA; only public keys
  418.  * may be retrieved.
  419.  */
  420. struct usb_key_descriptor {
  421.         __u8  bLength;
  422.         __u8  bDescriptorType;
  423.  
  424.         __u8  tTKID[3];
  425.         __u8  bReserved;
  426.         __u8  bKeyData[0];
  427. } __attribute__((packed));
  428.  
  429. /*-------------------------------------------------------------------------*/
  430.  
  431. /* USB_DT_ENCRYPTION_TYPE:  bundled in DT_SECURITY groups */
  432. struct usb_encryption_descriptor {
  433.         __u8  bLength;
  434.         __u8  bDescriptorType;
  435.  
  436.         __u8  bEncryptionType;
  437. #define USB_ENC_TYPE_UNSECURE           0
  438. #define USB_ENC_TYPE_WIRED              1       /* non-wireless mode */
  439. #define USB_ENC_TYPE_CCM_1              2       /* aes128/cbc session */
  440. #define USB_ENC_TYPE_RSA_1              3       /* rsa3072/sha1 auth */
  441.         __u8  bEncryptionValue;         /* use in SET_ENCRYPTION */
  442.         __u8  bAuthKeyIndex;
  443. } __attribute__((packed));
  444.  
  445.  
  446. /*-------------------------------------------------------------------------*/
  447.  
  448. /* USB_DT_BOS:  group of wireless capabilities */
  449. struct usb_bos_descriptor {
  450.         __u8  bLength;
  451.         __u8  bDescriptorType;
  452.  
  453.         __le16 wTotalLength;
  454.         __u8  bNumDeviceCaps;
  455. } __attribute__((packed));
  456.  
  457. /*-------------------------------------------------------------------------*/
  458.  
  459. /* USB_DT_DEVICE_CAPABILITY:  grouped with BOS */
  460. struct usb_dev_cap_header {
  461.         __u8  bLength;
  462.         __u8  bDescriptorType;
  463.         __u8  bDevCapabilityType;
  464. } __attribute__((packed));
  465.  
  466. #define USB_CAP_TYPE_WIRELESS_USB       1
  467.  
  468. struct usb_wireless_cap_descriptor {    /* Ultra Wide Band */
  469.         __u8  bLength;
  470.         __u8  bDescriptorType;
  471.         __u8  bDevCapabilityType;
  472.  
  473.         __u8  bmAttributes;
  474. #define USB_WIRELESS_P2P_DRD            (1 << 1)
  475. #define USB_WIRELESS_BEACON_MASK        (3 << 2)
  476. #define USB_WIRELESS_BEACON_SELF        (1 << 2)
  477. #define USB_WIRELESS_BEACON_DIRECTED    (2 << 2)
  478. #define USB_WIRELESS_BEACON_NONE        (3 << 2)
  479.         __le16 wPHYRates;       /* bit rates, Mbps */
  480. #define USB_WIRELESS_PHY_53             (1 << 0)        /* always set */
  481. #define USB_WIRELESS_PHY_80             (1 << 1)
  482. #define USB_WIRELESS_PHY_107            (1 << 2)        /* always set */
  483. #define USB_WIRELESS_PHY_160            (1 << 3)
  484. #define USB_WIRELESS_PHY_200            (1 << 4)        /* always set */
  485. #define USB_WIRELESS_PHY_320            (1 << 5)
  486. #define USB_WIRELESS_PHY_400            (1 << 6)
  487. #define USB_WIRELESS_PHY_480            (1 << 7)
  488.         __u8  bmTFITXPowerInfo; /* TFI power levels */
  489.         __u8  bmFFITXPowerInfo; /* FFI power levels */
  490.         __le16 bmBandGroup;
  491.         __u8  bReserved;
  492. } __attribute__((packed));
  493.  
  494. /*-------------------------------------------------------------------------*/
  495.  
  496. /* USB_DT_WIRELESS_ENDPOINT_COMP:  companion descriptor associated with
  497.  * each endpoint descriptor for a wireless device
  498.  */
  499. struct usb_wireless_ep_comp_descriptor {
  500.         __u8  bLength;
  501.         __u8  bDescriptorType;
  502.  
  503.         __u8  bMaxBurst;
  504.         __u8  bMaxSequence;
  505.         __le16 wMaxStreamDelay;
  506.         __le16 wOverTheAirPacketSize;
  507.         __u8  bOverTheAirInterval;
  508.         __u8  bmCompAttributes;
  509. #define USB_ENDPOINT_SWITCH_MASK        0x03    /* in bmCompAttributes */
  510. #define USB_ENDPOINT_SWITCH_NO          0
  511. #define USB_ENDPOINT_SWITCH_SWITCH      1
  512. #define USB_ENDPOINT_SWITCH_SCALE       2
  513. } __attribute__((packed));
  514.  
  515. /*-------------------------------------------------------------------------*/
  516.  
  517. /* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
  518.  * host and a device for connection set up, mutual authentication, and
  519.  * exchanging short lived session keys.  The handshake depends on a CC.
  520.  */
  521. struct usb_handshake {
  522.         __u8 bMessageNumber;
  523.         __u8 bStatus;
  524.         __u8 tTKID[3];
  525.         __u8 bReserved;
  526.         __u8 CDID[16];
  527.         __u8 nonce[16];
  528.         __u8 MIC[8];
  529. } __attribute__((packed));
  530.  
  531. /*-------------------------------------------------------------------------*/
  532.  
  533. /* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
  534.  * A CC may also be set up using non-wireless secure channels (including
  535.  * wired USB!), and some devices may support CCs with multiple hosts.
  536.  */
  537. struct usb_connection_context {
  538.         __u8 CHID[16];          /* persistent host id */
  539.         __u8 CDID[16];          /* device id (unique w/in host context) */
  540.         __u8 CK[16];            /* connection key */
  541. } __attribute__((packed));
  542.  
  543. /*-------------------------------------------------------------------------*/
  544.  
  545. /* USB 2.0 defines three speeds, here's how Linux identifies them */
  546.  
  547. enum usb_device_speed {
  548.         USB_SPEED_UNKNOWN = 0,                  /* enumerating */
  549.         USB_SPEED_LOW, USB_SPEED_FULL,          /* usb 1.1 */
  550.         USB_SPEED_HIGH,                         /* usb 2.0 */
  551.         USB_SPEED_VARIABLE,                     /* wireless (usb 2.5) */
  552. };
  553.  
  554. enum usb_device_state {
  555.         /* NOTATTACHED isn't in the USB spec, and this state acts
  556.          * the same as ATTACHED ... but it's clearer this way.
  557.          */
  558.         USB_STATE_NOTATTACHED = 0,
  559.  
  560.         /* chapter 9 and authentication (wireless) device states */
  561.         USB_STATE_ATTACHED,
  562.         USB_STATE_POWERED,                      /* wired */
  563.         USB_STATE_UNAUTHENTICATED,              /* auth */
  564.         USB_STATE_RECONNECTING,                 /* auth */
  565.         USB_STATE_DEFAULT,                      /* limited function */
  566.         USB_STATE_ADDRESS,
  567.         USB_STATE_CONFIGURED,                   /* most functions */
  568.  
  569.         USB_STATE_SUSPENDED
  570.  
  571.         /* NOTE:  there are actually four different SUSPENDED
  572.          * states, returning to POWERED, DEFAULT, ADDRESS, or
  573.          * CONFIGURED respectively when SOF tokens flow again.
  574.          */
  575. };
  576.  
  577. #endif  /* __LINUX_USB_CH9_H */
  578.