release/src-rt-6.x/linux/linux-2.6/include/linux/usb/ch9.h

   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.  The convention is
 185  * defined in the USB "Common Class" Spec (3.11).  Individual class specs
 186  * are authoritative for their usage, not the "common class" writeup.
 187  */
 188 #define USB_DT_CS_DEVICE                (USB_TYPE_CLASS | USB_DT_DEVICE)
 189 #define USB_DT_CS_CONFIG                (USB_TYPE_CLASS | USB_DT_CONFIG)
 190 #define USB_DT_CS_STRING                (USB_TYPE_CLASS | USB_DT_STRING)
 191 #define USB_DT_CS_INTERFACE             (USB_TYPE_CLASS | USB_DT_INTERFACE)
 192 #define USB_DT_CS_ENDPOINT              (USB_TYPE_CLASS | USB_DT_ENDPOINT)
 193
 194 /* All standard descriptors have these 2 fields at the beginning */
 195 struct usb_descriptor_header {
 196         __u8  bLength;
 197         __u8  bDescriptorType;
 198 } __attribute__ ((packed));
 199
 200
 201 /*-------------------------------------------------------------------------*/
 202
 203 /* USB_DT_DEVICE: Device descriptor */
 204 struct usb_device_descriptor {
 205         __u8  bLength;
 206         __u8  bDescriptorType;
 207
 208         __le16 bcdUSB;
 209         __u8  bDeviceClass;
 210         __u8  bDeviceSubClass;
 211         __u8  bDeviceProtocol;
 212         __u8  bMaxPacketSize0;
 213         __le16 idVendor;
 214         __le16 idProduct;
 215         __le16 bcdDevice;
 216         __u8  iManufacturer;
 217         __u8  iProduct;
 218         __u8  iSerialNumber;
 219         __u8  bNumConfigurations;
 220 } __attribute__ ((packed));
 221
 222 #define USB_DT_DEVICE_SIZE              18
 223
 224
 225 /*
 226  * Device and/or Interface Class codes
 227  * as found in bDeviceClass or bInterfaceClass
 228  * and defined by www.usb.org documents
 229  */
 230 #define USB_CLASS_PER_INTERFACE         0       /* for DeviceClass */
 231 #define USB_CLASS_AUDIO                 1
 232 #define USB_CLASS_COMM                  2
 233 #define USB_CLASS_HID                   3
 234 #define USB_CLASS_PHYSICAL              5
 235 #define USB_CLASS_STILL_IMAGE           6
 236 #define USB_CLASS_PRINTER               7
 237 #define USB_CLASS_MASS_STORAGE          8
 238 #define USB_CLASS_HUB                   9
 239 #define USB_CLASS_CDC_DATA              0x0a
 240 #define USB_CLASS_CSCID                 0x0b    /* chip+ smart card */
 241 #define USB_CLASS_CONTENT_SEC           0x0d    /* content security */
 242 #define USB_CLASS_VIDEO                 0x0e
 243 #define USB_CLASS_WIRELESS_CONTROLLER   0xe0
 244 #define USB_CLASS_MISC                  0xef
 245 #define USB_CLASS_APP_SPEC              0xfe
 246 #define USB_CLASS_VENDOR_SPEC           0xff
 247
 248 /*-------------------------------------------------------------------------*/
 249
 250 /* USB_DT_CONFIG: Configuration descriptor information.
 251  *
 252  * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
 253  * descriptor type is different.  Highspeed-capable devices can look
 254  * different depending on what speed they're currently running.  Only
 255  * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
 256  * descriptors.
 257  */
 258 struct usb_config_descriptor {
 259         __u8  bLength;
 260         __u8  bDescriptorType;
 261
 262         __le16 wTotalLength;
 263         __u8  bNumInterfaces;
 264         __u8  bConfigurationValue;
 265         __u8  iConfiguration;
 266         __u8  bmAttributes;
 267         __u8  bMaxPower;
 268 } __attribute__ ((packed));
 269
 270 #define USB_DT_CONFIG_SIZE              9
 271
 272 /* from config descriptor bmAttributes */
 273 #define USB_CONFIG_ATT_ONE              (1 << 7)        /* must be set */
 274 #define USB_CONFIG_ATT_SELFPOWER        (1 << 6)        /* self powered */
 275 #define USB_CONFIG_ATT_WAKEUP           (1 << 5)        /* can wakeup */
 276 #define USB_CONFIG_ATT_BATTERY          (1 << 4)        /* battery powered */
 277
 278 /*-------------------------------------------------------------------------*/
 279
 280 /* USB_DT_STRING: String descriptor */
 281 struct usb_string_descriptor {
 282         __u8  bLength;
 283         __u8  bDescriptorType;
 284
 285         __le16 wData[1];                /* UTF-16LE encoded */
 286 } __attribute__ ((packed));
 287
 288 /* note that "string" zero is special, it holds language codes that
 289  * the device supports, not Unicode characters.
 290  */
 291
 292 /*-------------------------------------------------------------------------*/
 293
 294 /* USB_DT_INTERFACE: Interface descriptor */
 295 struct usb_interface_descriptor {
 296         __u8  bLength;
 297         __u8  bDescriptorType;
 298
 299         __u8  bInterfaceNumber;
 300         __u8  bAlternateSetting;
 301         __u8  bNumEndpoints;
 302         __u8  bInterfaceClass;
 303         __u8  bInterfaceSubClass;
 304         __u8  bInterfaceProtocol;
 305         __u8  iInterface;
 306 } __attribute__ ((packed));
 307
 308 #define USB_DT_INTERFACE_SIZE           9
 309
 310 /*-------------------------------------------------------------------------*/
 311
 312 /* USB_DT_ENDPOINT: Endpoint descriptor */
 313 struct usb_endpoint_descriptor {
 314         __u8  bLength;
 315         __u8  bDescriptorType;
 316
 317         __u8  bEndpointAddress;
 318         __u8  bmAttributes;
 319         __le16 wMaxPacketSize;
 320         __u8  bInterval;
 321
 322         /* NOTE:  these two are _only_ in audio endpoints. */
 323         /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
 324         __u8  bRefresh;
 325         __u8  bSynchAddress;
 326 } __attribute__ ((packed));
 327
 328 #define USB_DT_ENDPOINT_SIZE            7
 329 #define USB_DT_ENDPOINT_AUDIO_SIZE      9       /* Audio extension */
 330
 331
 332 /*
 333  * Endpoints
 334  */
 335 #define USB_ENDPOINT_NUMBER_MASK        0x0f    /* in bEndpointAddress */
 336 #define USB_ENDPOINT_DIR_MASK           0x80
 337
 338 #define USB_ENDPOINT_XFERTYPE_MASK      0x03    /* in bmAttributes */
 339 #define USB_ENDPOINT_XFER_CONTROL       0
 340 #define USB_ENDPOINT_XFER_ISOC          1
 341 #define USB_ENDPOINT_XFER_BULK          2
 342 #define USB_ENDPOINT_XFER_INT           3
 343 #define USB_ENDPOINT_MAX_ADJUSTABLE     0x80
 344
 345
 346 /*-------------------------------------------------------------------------*/
 347
 348 /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
 349 struct usb_qualifier_descriptor {
 350         __u8  bLength;
 351         __u8  bDescriptorType;
 352
 353         __le16 bcdUSB;
 354         __u8  bDeviceClass;
 355         __u8  bDeviceSubClass;
 356         __u8  bDeviceProtocol;
 357         __u8  bMaxPacketSize0;
 358         __u8  bNumConfigurations;
 359         __u8  bRESERVED;
 360 } __attribute__ ((packed));
 361
 362
 363 /*-------------------------------------------------------------------------*/
 364
 365 /* USB_DT_OTG (from OTG 1.0a supplement) */
 366 struct usb_otg_descriptor {
 367         __u8  bLength;
 368         __u8  bDescriptorType;
 369
 370         __u8  bmAttributes;     /* support for HNP, SRP, etc */
 371 } __attribute__ ((packed));
 372
 373 /* from usb_otg_descriptor.bmAttributes */
 374 #define USB_OTG_SRP             (1 << 0)
 375 #define USB_OTG_HNP             (1 << 1)        /* swap host/device roles */
 376
 377 /*-------------------------------------------------------------------------*/
 378
 379 /* USB_DT_DEBUG:  for special highspeed devices, replacing serial console */
 380 struct usb_debug_descriptor {
 381         __u8  bLength;
 382         __u8  bDescriptorType;
 383
 384         /* bulk endpoints with 8 byte maxpacket */
 385         __u8  bDebugInEndpoint;
 386         __u8  bDebugOutEndpoint;
 387 } __attribute__((packed));
 388
 389 /*-------------------------------------------------------------------------*/
 390
 391 /* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
 392 struct usb_interface_assoc_descriptor {
 393         __u8  bLength;
 394         __u8  bDescriptorType;
 395
 396         __u8  bFirstInterface;
 397         __u8  bInterfaceCount;
 398         __u8  bFunctionClass;
 399         __u8  bFunctionSubClass;
 400         __u8  bFunctionProtocol;
 401         __u8  iFunction;
 402 } __attribute__ ((packed));
 403
 404
 405 /*-------------------------------------------------------------------------*/
 406
 407 /* USB_DT_SECURITY:  group of wireless security descriptors, including
 408  * encryption types available for setting up a CC/association.
 409  */
 410 struct usb_security_descriptor {
 411         __u8  bLength;
 412         __u8  bDescriptorType;
 413
 414         __le16 wTotalLength;
 415         __u8  bNumEncryptionTypes;
 416 } __attribute__((packed));
 417
 418 /*-------------------------------------------------------------------------*/
 419
 420 /* USB_DT_KEY:  used with {GET,SET}_SECURITY_DATA; only public keys
 421  * may be retrieved.
 422  */
 423 struct usb_key_descriptor {
 424         __u8  bLength;
 425         __u8  bDescriptorType;
 426
 427         __u8  tTKID[3];
 428         __u8  bReserved;
 429         __u8  bKeyData[0];
 430 } __attribute__((packed));
 431
 432 /*-------------------------------------------------------------------------*/
 433
 434 /* USB_DT_ENCRYPTION_TYPE:  bundled in DT_SECURITY groups */
 435 struct usb_encryption_descriptor {
 436         __u8  bLength;
 437         __u8  bDescriptorType;
 438
 439         __u8  bEncryptionType;
 440 #define USB_ENC_TYPE_UNSECURE           0
 441 #define USB_ENC_TYPE_WIRED              1       /* non-wireless mode */
 442 #define USB_ENC_TYPE_CCM_1              2       /* aes128/cbc session */
 443 #define USB_ENC_TYPE_RSA_1              3       /* rsa3072/sha1 auth */
 444         __u8  bEncryptionValue;         /* use in SET_ENCRYPTION */
 445         __u8  bAuthKeyIndex;
 446 } __attribute__((packed));
 447
 448
 449 /*-------------------------------------------------------------------------*/
 450
 451 /* USB_DT_BOS:  group of wireless capabilities */
 452 struct usb_bos_descriptor {
 453         __u8  bLength;
 454         __u8  bDescriptorType;
 455
 456         __le16 wTotalLength;
 457         __u8  bNumDeviceCaps;
 458 } __attribute__((packed));
 459
 460 /*-------------------------------------------------------------------------*/
 461
 462 /* USB_DT_DEVICE_CAPABILITY:  grouped with BOS */
 463 struct usb_dev_cap_header {
 464         __u8  bLength;
 465         __u8  bDescriptorType;
 466         __u8  bDevCapabilityType;
 467 } __attribute__((packed));
 468
 469 #define USB_CAP_TYPE_WIRELESS_USB       1
 470
 471 struct usb_wireless_cap_descriptor {    /* Ultra Wide Band */
 472         __u8  bLength;
 473         __u8  bDescriptorType;
 474         __u8  bDevCapabilityType;
 475
 476         __u8  bmAttributes;
 477 #define USB_WIRELESS_P2P_DRD            (1 << 1)
 478 #define USB_WIRELESS_BEACON_MASK        (3 << 2)
 479 #define USB_WIRELESS_BEACON_SELF        (1 << 2)
 480 #define USB_WIRELESS_BEACON_DIRECTED    (2 << 2)
 481 #define USB_WIRELESS_BEACON_NONE        (3 << 2)
 482         __le16 wPHYRates;       /* bit rates, Mbps */
 483 #define USB_WIRELESS_PHY_53             (1 << 0)        /* always set */
 484 #define USB_WIRELESS_PHY_80             (1 << 1)
 485 #define USB_WIRELESS_PHY_107            (1 << 2)        /* always set */
 486 #define USB_WIRELESS_PHY_160            (1 << 3)
 487 #define USB_WIRELESS_PHY_200            (1 << 4)        /* always set */
 488 #define USB_WIRELESS_PHY_320            (1 << 5)
 489 #define USB_WIRELESS_PHY_400            (1 << 6)
 490 #define USB_WIRELESS_PHY_480            (1 << 7)
 491         __u8  bmTFITXPowerInfo; /* TFI power levels */
 492         __u8  bmFFITXPowerInfo; /* FFI power levels */
 493         __le16 bmBandGroup;
 494         __u8  bReserved;
 495 } __attribute__((packed));
 496
 497 /*-------------------------------------------------------------------------*/
 498
 499 /* USB_DT_WIRELESS_ENDPOINT_COMP:  companion descriptor associated with
 500  * each endpoint descriptor for a wireless device
 501  */
 502 struct usb_wireless_ep_comp_descriptor {
 503         __u8  bLength;
 504         __u8  bDescriptorType;
 505
 506         __u8  bMaxBurst;
 507         __u8  bMaxSequence;
 508         __le16 wMaxStreamDelay;
 509         __le16 wOverTheAirPacketSize;
 510         __u8  bOverTheAirInterval;
 511         __u8  bmCompAttributes;
 512 #define USB_ENDPOINT_SWITCH_MASK        0x03    /* in bmCompAttributes */
 513 #define USB_ENDPOINT_SWITCH_NO          0
 514 #define USB_ENDPOINT_SWITCH_SWITCH      1
 515 #define USB_ENDPOINT_SWITCH_SCALE       2
 516 } __attribute__((packed));
 517
 518 /*-------------------------------------------------------------------------*/
 519
 520 /* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
 521  * host and a device for connection set up, mutual authentication, and
 522  * exchanging short lived session keys.  The handshake depends on a CC.
 523  */
 524 struct usb_handshake {
 525         __u8 bMessageNumber;
 526         __u8 bStatus;
 527         __u8 tTKID[3];
 528         __u8 bReserved;
 529         __u8 CDID[16];
 530         __u8 nonce[16];
 531         __u8 MIC[8];
 532 } __attribute__((packed));
 533
 534 /*-------------------------------------------------------------------------*/
 535
 536 /* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
 537  * A CC may also be set up using non-wireless secure channels (including
 538  * wired USB!), and some devices may support CCs with multiple hosts.
 539  */
 540 struct usb_connection_context {
 541         __u8 CHID[16];          /* persistent host id */
 542         __u8 CDID[16];          /* device id (unique w/in host context) */
 543         __u8 CK[16];            /* connection key */
 544 } __attribute__((packed));
 545
 546 /*-------------------------------------------------------------------------*/
 547
 548 /* USB 2.0 defines three speeds, here's how Linux identifies them */
 549
 550 enum usb_device_speed {
 551         USB_SPEED_UNKNOWN = 0,                  /* enumerating */
 552         USB_SPEED_LOW, USB_SPEED_FULL,          /* usb 1.1 */
 553         USB_SPEED_HIGH,                         /* usb 2.0 */
 554         USB_SPEED_VARIABLE,                     /* wireless (usb 2.5) */
 555 };
 556
 557 enum usb_device_state {
 558         /* NOTATTACHED isn't in the USB spec, and this state acts
 559          * the same as ATTACHED ... but it's clearer this way.
 560          */
 561         USB_STATE_NOTATTACHED = 0,
 562
 563         /* chapter 9 and authentication (wireless) device states */
 564         USB_STATE_ATTACHED,
 565         USB_STATE_POWERED,                      /* wired */
 566         USB_STATE_UNAUTHENTICATED,              /* auth */
 567         USB_STATE_RECONNECTING,                 /* auth */
 568         USB_STATE_DEFAULT,                      /* limited function */
 569         USB_STATE_ADDRESS,
 570         USB_STATE_CONFIGURED,                   /* most functions */
 571
 572         USB_STATE_SUSPENDED
 573
 574         /* NOTE:  there are actually four different SUSPENDED
 575          * states, returning to POWERED, DEFAULT, ADDRESS, or
 576          * CONFIGURED respectively when SOF tokens flow again.
 577          */
 578 };
 579
 580 #endif  /* __LINUX_USB_CH9_H */