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 /* The Link Power Management (LPM) ECN defines USB_REQ_TEST_AND_SET command,
 106  * used by hubs to put ports into a new L1 suspend state, except that it
 107  * forgot to define its number ...
 108  */
 109
 110 /*
 111  * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
 112  * are read as a bit array returned by USB_REQ_GET_STATUS.  (So there
 113  * are at most sixteen features of each type.)  Hubs may also support a
 114  * new USB_REQ_TEST_AND_SET_FEATURE to put ports into L1 suspend.
 115  */
 116 #define USB_DEVICE_SELF_POWERED         0       /* (read only) */
 117 #define USB_DEVICE_REMOTE_WAKEUP        1       /* dev may initiate wakeup */
 118 #define USB_DEVICE_TEST_MODE            2       /* (wired high speed only) */
 119 #define USB_DEVICE_BATTERY              2       /* (wireless) */
 120 #define USB_DEVICE_B_HNP_ENABLE         3       /* (otg) dev may initiate HNP */
 121 #define USB_DEVICE_WUSB_DEVICE          3       /* (wireless)*/
 122 #define USB_DEVICE_A_HNP_SUPPORT        4       /* (otg) RH port supports HNP */
 123 #define USB_DEVICE_A_ALT_HNP_SUPPORT    5       /* (otg) other RH port does */
 124 #define USB_DEVICE_DEBUG_MODE           6       /* (special devices only) */
 125
 126 #define USB_ENDPOINT_HALT               0       /* IN/OUT will STALL */
 127
 128
 129 /**
 130  * struct usb_ctrlrequest - SETUP data for a USB device control request
 131  * @bRequestType: matches the USB bmRequestType field
 132  * @bRequest: matches the USB bRequest field
 133  * @wValue: matches the USB wValue field (le16 byte order)
 134  * @wIndex: matches the USB wIndex field (le16 byte order)
 135  * @wLength: matches the USB wLength field (le16 byte order)
 136  *
 137  * This structure is used to send control requests to a USB device.  It matches
 138  * the different fields of the USB 2.0 Spec section 9.3, table 9-2.  See the
 139  * USB spec for a fuller description of the different fields, and what they are
 140  * used for.
 141  *
 142  * Note that the driver for any interface can issue control requests.
 143  * For most devices, interfaces don't coordinate with each other, so
 144  * such requests may be made at any time.
 145  */
 146 struct usb_ctrlrequest {
 147         __u8 bRequestType;
 148         __u8 bRequest;
 149         __le16 wValue;
 150         __le16 wIndex;
 151         __le16 wLength;
 152 } __attribute__ ((packed));
 153
 154 /*-------------------------------------------------------------------------*/
 155
 156 /*
 157  * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
 158  * (rarely) accepted by SET_DESCRIPTOR.
 159  *
 160  * Note that all multi-byte values here are encoded in little endian
 161  * byte order "on the wire".  Within the kernel and when exposed
 162  * through the Linux-USB APIs, they are not converted to cpu byte
 163  * order; it is the responsibility of the client code to do this.
 164  * The single exception is when device and configuration descriptors (but
 165  * not other descriptors) are read from usbfs (i.e. /proc/bus/usb/BBB/DDD);
 166  * in this case the fields are converted to host endianness by the kernel.
 167  */
 168
 169 /*
 170  * Descriptor types ... USB 2.0 spec table 9.5
 171  */
 172 #define USB_DT_DEVICE                   0x01
 173 #define USB_DT_CONFIG                   0x02
 174 #define USB_DT_STRING                   0x03
 175 #define USB_DT_INTERFACE                0x04
 176 #define USB_DT_ENDPOINT                 0x05
 177 #define USB_DT_DEVICE_QUALIFIER         0x06
 178 #define USB_DT_OTHER_SPEED_CONFIG       0x07
 179 #define USB_DT_INTERFACE_POWER          0x08
 180 /* these are from a minor usb 2.0 revision (ECN) */
 181 #define USB_DT_OTG                      0x09
 182 #define USB_DT_DEBUG                    0x0a
 183 #define USB_DT_INTERFACE_ASSOCIATION    0x0b
 184 /* these are from the Wireless USB spec */
 185 #define USB_DT_SECURITY                 0x0c
 186 #define USB_DT_KEY                      0x0d
 187 #define USB_DT_ENCRYPTION_TYPE          0x0e
 188 #define USB_DT_BOS                      0x0f
 189 #define USB_DT_DEVICE_CAPABILITY        0x10
 190 #define USB_DT_WIRELESS_ENDPOINT_COMP   0x11
 191 #define USB_DT_WIRE_ADAPTER             0x21
 192 #define USB_DT_RPIPE                    0x22
 193 #define USB_DT_CS_RADIO_CONTROL         0x23
 194 /* From the USB 3.0 spec */
 195 #define USB_DT_SS_ENDPOINT_COMP         0x30
 196
 197 /* Conventional codes for class-specific descriptors.  The convention is
 198  * defined in the USB "Common Class" Spec (3.11).  Individual class specs
 199  * are authoritative for their usage, not the "common class" writeup.
 200  */
 201 #define USB_DT_CS_DEVICE                (USB_TYPE_CLASS | USB_DT_DEVICE)
 202 #define USB_DT_CS_CONFIG                (USB_TYPE_CLASS | USB_DT_CONFIG)
 203 #define USB_DT_CS_STRING                (USB_TYPE_CLASS | USB_DT_STRING)
 204 #define USB_DT_CS_INTERFACE             (USB_TYPE_CLASS | USB_DT_INTERFACE)
 205 #define USB_DT_CS_ENDPOINT              (USB_TYPE_CLASS | USB_DT_ENDPOINT)
 206
 207 /* All standard descriptors have these 2 fields at the beginning */
 208 struct usb_descriptor_header {
 209         __u8  bLength;
 210         __u8  bDescriptorType;
 211 } __attribute__ ((packed));
 212
 213
 214 /*-------------------------------------------------------------------------*/
 215
 216 /* USB_DT_DEVICE: Device descriptor */
 217 struct usb_device_descriptor {
 218         __u8  bLength;
 219         __u8  bDescriptorType;
 220
 221         __le16 bcdUSB;
 222         __u8  bDeviceClass;
 223         __u8  bDeviceSubClass;
 224         __u8  bDeviceProtocol;
 225         __u8  bMaxPacketSize0;
 226         __le16 idVendor;
 227         __le16 idProduct;
 228         __le16 bcdDevice;
 229         __u8  iManufacturer;
 230         __u8  iProduct;
 231         __u8  iSerialNumber;
 232         __u8  bNumConfigurations;
 233 } __attribute__ ((packed));
 234
 235 #define USB_DT_DEVICE_SIZE              18
 236
 237
 238 /*
 239  * Device and/or Interface Class codes
 240  * as found in bDeviceClass or bInterfaceClass
 241  * and defined by www.usb.org documents
 242  */
 243 #define USB_CLASS_PER_INTERFACE         0       /* for DeviceClass */
 244 #define USB_CLASS_AUDIO                 1
 245 #define USB_CLASS_COMM                  2
 246 #define USB_CLASS_HID                   3
 247 #define USB_CLASS_PHYSICAL              5
 248 #define USB_CLASS_STILL_IMAGE           6
 249 #define USB_CLASS_PRINTER               7
 250 #define USB_CLASS_MASS_STORAGE          8
 251 #define USB_CLASS_HUB                   9
 252 #define USB_CLASS_CDC_DATA              0x0a
 253 #define USB_CLASS_CSCID                 0x0b    /* chip+ smart card */
 254 #define USB_CLASS_CONTENT_SEC           0x0d    /* content security */
 255 #define USB_CLASS_VIDEO                 0x0e
 256 #define USB_CLASS_WIRELESS_CONTROLLER   0xe0
 257 #define USB_CLASS_MISC                  0xef
 258 #define USB_CLASS_APP_SPEC              0xfe
 259 #define USB_CLASS_VENDOR_SPEC           0xff
 260
 261 #define USB_SUBCLASS_VENDOR_SPEC        0xff
 262
 263 /*-------------------------------------------------------------------------*/
 264
 265 /* USB_DT_CONFIG: Configuration descriptor information.
 266  *
 267  * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
 268  * descriptor type is different.  Highspeed-capable devices can look
 269  * different depending on what speed they're currently running.  Only
 270  * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
 271  * descriptors.
 272  */
 273 struct usb_config_descriptor {
 274         __u8  bLength;
 275         __u8  bDescriptorType;
 276
 277         __le16 wTotalLength;
 278         __u8  bNumInterfaces;
 279         __u8  bConfigurationValue;
 280         __u8  iConfiguration;
 281         __u8  bmAttributes;
 282         __u8  bMaxPower;
 283 } __attribute__ ((packed));
 284
 285 #define USB_DT_CONFIG_SIZE              9
 286
 287 /* from config descriptor bmAttributes */
 288 #define USB_CONFIG_ATT_ONE              (1 << 7)        /* must be set */
 289 #define USB_CONFIG_ATT_SELFPOWER        (1 << 6)        /* self powered */
 290 #define USB_CONFIG_ATT_WAKEUP           (1 << 5)        /* can wakeup */
 291 #define USB_CONFIG_ATT_BATTERY          (1 << 4)        /* battery powered */
 292
 293 /*-------------------------------------------------------------------------*/
 294
 295 /* USB_DT_STRING: String descriptor */
 296 struct usb_string_descriptor {
 297         __u8  bLength;
 298         __u8  bDescriptorType;
 299
 300         __le16 wData[1];                /* UTF-16LE encoded */
 301 } __attribute__ ((packed));
 302
 303 /* note that "string" zero is special, it holds language codes that
 304  * the device supports, not Unicode characters.
 305  */
 306
 307 /*-------------------------------------------------------------------------*/
 308
 309 /* USB_DT_INTERFACE: Interface descriptor */
 310 struct usb_interface_descriptor {
 311         __u8  bLength;
 312         __u8  bDescriptorType;
 313
 314         __u8  bInterfaceNumber;
 315         __u8  bAlternateSetting;
 316         __u8  bNumEndpoints;
 317         __u8  bInterfaceClass;
 318         __u8  bInterfaceSubClass;
 319         __u8  bInterfaceProtocol;
 320         __u8  iInterface;
 321 } __attribute__ ((packed));
 322
 323 #define USB_DT_INTERFACE_SIZE           9
 324
 325 /*-------------------------------------------------------------------------*/
 326
 327 /* USB_DT_ENDPOINT: Endpoint descriptor */
 328 struct usb_endpoint_descriptor {
 329         __u8  bLength;
 330         __u8  bDescriptorType;
 331
 332         __u8  bEndpointAddress;
 333         __u8  bmAttributes;
 334         __le16 wMaxPacketSize;
 335         __u8  bInterval;
 336
 337         /* NOTE:  these two are _only_ in audio endpoints. */
 338         /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
 339         __u8  bRefresh;
 340         __u8  bSynchAddress;
 341 } __attribute__ ((packed));
 342
 343 #define USB_DT_ENDPOINT_SIZE            7
 344 #define USB_DT_ENDPOINT_AUDIO_SIZE      9       /* Audio extension */
 345
 346
 347 /*
 348  * Endpoints
 349  */
 350 #define USB_ENDPOINT_NUMBER_MASK        0x0f    /* in bEndpointAddress */
 351 #define USB_ENDPOINT_DIR_MASK           0x80
 352
 353 #define USB_ENDPOINT_SYNCTYPE           0x0c
 354 #define USB_ENDPOINT_SYNC_NONE          (0 << 2)
 355 #define USB_ENDPOINT_SYNC_ASYNC         (1 << 2)
 356 #define USB_ENDPOINT_SYNC_ADAPTIVE      (2 << 2)
 357 #define USB_ENDPOINT_SYNC_SYNC          (3 << 2)
 358
 359 #define USB_ENDPOINT_XFERTYPE_MASK      0x03    /* in bmAttributes */
 360 #define USB_ENDPOINT_XFER_CONTROL       0
 361 #define USB_ENDPOINT_XFER_ISOC          1
 362 #define USB_ENDPOINT_XFER_BULK          2
 363 #define USB_ENDPOINT_XFER_INT           3
 364 #define USB_ENDPOINT_MAX_ADJUSTABLE     0x80
 365
 366 /*-------------------------------------------------------------------------*/
 367
 368 /**
 369  * usb_endpoint_num - get the endpoint's number
 370  * @epd: endpoint to be checked
 371  *
 372  * Returns @epd's number: 0 to 15.
 373  */
 374 static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
 375 {
 376         return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 377 }
 378
 379 /**
 380  * usb_endpoint_type - get the endpoint's transfer type
 381  * @epd: endpoint to be checked
 382  *
 383  * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
 384  * to @epd's transfer type.
 385  */
 386 static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
 387 {
 388         return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
 389 }
 390
 391 /**
 392  * usb_endpoint_dir_in - check if the endpoint has IN direction
 393  * @epd: endpoint to be checked
 394  *
 395  * Returns true if the endpoint is of type IN, otherwise it returns false.
 396  */
 397 static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
 398 {
 399         return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN);
 400 }
 401
 402 /**
 403  * usb_endpoint_dir_out - check if the endpoint has OUT direction
 404  * @epd: endpoint to be checked
 405  *
 406  * Returns true if the endpoint is of type OUT, otherwise it returns false.
 407  */
 408 static inline int usb_endpoint_dir_out(
 409                                 const struct usb_endpoint_descriptor *epd)
 410 {
 411         return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT);
 412 }
 413
 414 /**
 415  * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type
 416  * @epd: endpoint to be checked
 417  *
 418  * Returns true if the endpoint is of type bulk, otherwise it returns false.
 419  */
 420 static inline int usb_endpoint_xfer_bulk(
 421                                 const struct usb_endpoint_descriptor *epd)
 422 {
 423         return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 424                 USB_ENDPOINT_XFER_BULK);
 425 }
 426
 427 /**
 428  * usb_endpoint_xfer_control - check if the endpoint has control transfer type
 429  * @epd: endpoint to be checked
 430  *
 431  * Returns true if the endpoint is of type control, otherwise it returns false.
 432  */
 433 static inline int usb_endpoint_xfer_control(
 434                                 const struct usb_endpoint_descriptor *epd)
 435 {
 436         return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 437                 USB_ENDPOINT_XFER_CONTROL);
 438 }
 439
 440 /**
 441  * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type
 442  * @epd: endpoint to be checked
 443  *
 444  * Returns true if the endpoint is of type interrupt, otherwise it returns
 445  * false.
 446  */
 447 static inline int usb_endpoint_xfer_int(
 448                                 const struct usb_endpoint_descriptor *epd)
 449 {
 450         return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 451                 USB_ENDPOINT_XFER_INT);
 452 }
 453
 454 /**
 455  * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type
 456  * @epd: endpoint to be checked
 457  *
 458  * Returns true if the endpoint is of type isochronous, otherwise it returns
 459  * false.
 460  */
 461 static inline int usb_endpoint_xfer_isoc(
 462                                 const struct usb_endpoint_descriptor *epd)
 463 {
 464         return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 465                 USB_ENDPOINT_XFER_ISOC);
 466 }
 467
 468 /**
 469  * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN
 470  * @epd: endpoint to be checked
 471  *
 472  * Returns true if the endpoint has bulk transfer type and IN direction,
 473  * otherwise it returns false.
 474  */
 475 static inline int usb_endpoint_is_bulk_in(
 476                                 const struct usb_endpoint_descriptor *epd)
 477 {
 478         return (usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd));
 479 }
 480
 481 /**
 482  * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT
 483  * @epd: endpoint to be checked
 484  *
 485  * Returns true if the endpoint has bulk transfer type and OUT direction,
 486  * otherwise it returns false.
 487  */
 488 static inline int usb_endpoint_is_bulk_out(
 489                                 const struct usb_endpoint_descriptor *epd)
 490 {
 491         return (usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd));
 492 }
 493
 494 /**
 495  * usb_endpoint_is_int_in - check if the endpoint is interrupt IN
 496  * @epd: endpoint to be checked
 497  *
 498  * Returns true if the endpoint has interrupt transfer type and IN direction,
 499  * otherwise it returns false.
 500  */
 501 static inline int usb_endpoint_is_int_in(
 502                                 const struct usb_endpoint_descriptor *epd)
 503 {
 504         return (usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd));
 505 }
 506
 507 /**
 508  * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT
 509  * @epd: endpoint to be checked
 510  *
 511  * Returns true if the endpoint has interrupt transfer type and OUT direction,
 512  * otherwise it returns false.
 513  */
 514 static inline int usb_endpoint_is_int_out(
 515                                 const struct usb_endpoint_descriptor *epd)
 516 {
 517         return (usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd));
 518 }
 519
 520 /**
 521  * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN
 522  * @epd: endpoint to be checked
 523  *
 524  * Returns true if the endpoint has isochronous transfer type and IN direction,
 525  * otherwise it returns false.
 526  */
 527 static inline int usb_endpoint_is_isoc_in(
 528                                 const struct usb_endpoint_descriptor *epd)
 529 {
 530         return (usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd));
 531 }
 532
 533 /**
 534  * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT
 535  * @epd: endpoint to be checked
 536  *
 537  * Returns true if the endpoint has isochronous transfer type and OUT direction,
 538  * otherwise it returns false.
 539  */
 540 static inline int usb_endpoint_is_isoc_out(
 541                                 const struct usb_endpoint_descriptor *epd)
 542 {
 543         return (usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd));
 544 }
 545
 546 /*-------------------------------------------------------------------------*/
 547
 548 /* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
 549 struct usb_ss_ep_comp_descriptor {
 550         __u8  bLength;
 551         __u8  bDescriptorType;
 552
 553         __u8  bMaxBurst;
 554         __u8  bmAttributes;
 555         __u16 wBytesPerInterval;
 556 } __attribute__ ((packed));
 557
 558 #define USB_DT_SS_EP_COMP_SIZE          6
 559
 560 /*-------------------------------------------------------------------------*/
 561
 562 /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
 563 struct usb_qualifier_descriptor {
 564         __u8  bLength;
 565         __u8  bDescriptorType;
 566
 567         __le16 bcdUSB;
 568         __u8  bDeviceClass;
 569         __u8  bDeviceSubClass;
 570         __u8  bDeviceProtocol;
 571         __u8  bMaxPacketSize0;
 572         __u8  bNumConfigurations;
 573         __u8  bRESERVED;
 574 } __attribute__ ((packed));
 575
 576
 577 /*-------------------------------------------------------------------------*/
 578
 579 /* USB_DT_OTG (from OTG 1.0a supplement) */
 580 struct usb_otg_descriptor {
 581         __u8  bLength;
 582         __u8  bDescriptorType;
 583
 584         __u8  bmAttributes;     /* support for HNP, SRP, etc */
 585 } __attribute__ ((packed));
 586
 587 /* from usb_otg_descriptor.bmAttributes */
 588 #define USB_OTG_SRP             (1 << 0)
 589 #define USB_OTG_HNP             (1 << 1)        /* swap host/device roles */
 590
 591 /*-------------------------------------------------------------------------*/
 592
 593 /* USB_DT_DEBUG:  for special highspeed devices, replacing serial console */
 594 struct usb_debug_descriptor {
 595         __u8  bLength;
 596         __u8  bDescriptorType;
 597
 598         /* bulk endpoints with 8 byte maxpacket */
 599         __u8  bDebugInEndpoint;
 600         __u8  bDebugOutEndpoint;
 601 } __attribute__((packed));
 602
 603 /*-------------------------------------------------------------------------*/
 604
 605 /* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
 606 struct usb_interface_assoc_descriptor {
 607         __u8  bLength;
 608         __u8  bDescriptorType;
 609
 610         __u8  bFirstInterface;
 611         __u8  bInterfaceCount;
 612         __u8  bFunctionClass;
 613         __u8  bFunctionSubClass;
 614         __u8  bFunctionProtocol;
 615         __u8  iFunction;
 616 } __attribute__ ((packed));
 617
 618
 619 /*-------------------------------------------------------------------------*/
 620
 621 /* USB_DT_SECURITY:  group of wireless security descriptors, including
 622  * encryption types available for setting up a CC/association.
 623  */
 624 struct usb_security_descriptor {
 625         __u8  bLength;
 626         __u8  bDescriptorType;
 627
 628         __le16 wTotalLength;
 629         __u8  bNumEncryptionTypes;
 630 } __attribute__((packed));
 631
 632 /*-------------------------------------------------------------------------*/
 633
 634 /* USB_DT_KEY:  used with {GET,SET}_SECURITY_DATA; only public keys
 635  * may be retrieved.
 636  */
 637 struct usb_key_descriptor {
 638         __u8  bLength;
 639         __u8  bDescriptorType;
 640
 641         __u8  tTKID[3];
 642         __u8  bReserved;
 643         __u8  bKeyData[0];
 644 } __attribute__((packed));
 645
 646 /*-------------------------------------------------------------------------*/
 647
 648 /* USB_DT_ENCRYPTION_TYPE:  bundled in DT_SECURITY groups */
 649 struct usb_encryption_descriptor {
 650         __u8  bLength;
 651         __u8  bDescriptorType;
 652
 653         __u8  bEncryptionType;
 654 #define USB_ENC_TYPE_UNSECURE           0
 655 #define USB_ENC_TYPE_WIRED              1       /* non-wireless mode */
 656 #define USB_ENC_TYPE_CCM_1              2       /* aes128/cbc session */
 657 #define USB_ENC_TYPE_RSA_1              3       /* rsa3072/sha1 auth */
 658         __u8  bEncryptionValue;         /* use in SET_ENCRYPTION */
 659         __u8  bAuthKeyIndex;
 660 } __attribute__((packed));
 661
 662
 663 /*-------------------------------------------------------------------------*/
 664
 665 /* USB_DT_BOS:  group of device-level capabilities */
 666 struct usb_bos_descriptor {
 667         __u8  bLength;
 668         __u8  bDescriptorType;
 669
 670         __le16 wTotalLength;
 671         __u8  bNumDeviceCaps;
 672 } __attribute__((packed));
 673
 674 /*-------------------------------------------------------------------------*/
 675
 676 /* USB_DT_DEVICE_CAPABILITY:  grouped with BOS */
 677 struct usb_dev_cap_header {
 678         __u8  bLength;
 679         __u8  bDescriptorType;
 680         __u8  bDevCapabilityType;
 681 } __attribute__((packed));
 682
 683 #define USB_CAP_TYPE_WIRELESS_USB       1
 684
 685 struct usb_wireless_cap_descriptor {    /* Ultra Wide Band */
 686         __u8  bLength;
 687         __u8  bDescriptorType;
 688         __u8  bDevCapabilityType;
 689
 690         __u8  bmAttributes;
 691 #define USB_WIRELESS_P2P_DRD            (1 << 1)
 692 #define USB_WIRELESS_BEACON_MASK        (3 << 2)
 693 #define USB_WIRELESS_BEACON_SELF        (1 << 2)
 694 #define USB_WIRELESS_BEACON_DIRECTED    (2 << 2)
 695 #define USB_WIRELESS_BEACON_NONE        (3 << 2)
 696         __le16 wPHYRates;       /* bit rates, Mbps */
 697 #define USB_WIRELESS_PHY_53             (1 << 0)        /* always set */
 698 #define USB_WIRELESS_PHY_80             (1 << 1)
 699 #define USB_WIRELESS_PHY_107            (1 << 2)        /* always set */
 700 #define USB_WIRELESS_PHY_160            (1 << 3)
 701 #define USB_WIRELESS_PHY_200            (1 << 4)        /* always set */
 702 #define USB_WIRELESS_PHY_320            (1 << 5)
 703 #define USB_WIRELESS_PHY_400            (1 << 6)
 704 #define USB_WIRELESS_PHY_480            (1 << 7)
 705         __u8  bmTFITXPowerInfo; /* TFI power levels */
 706         __u8  bmFFITXPowerInfo; /* FFI power levels */
 707         __le16 bmBandGroup;
 708         __u8  bReserved;
 709 } __attribute__((packed));
 710
 711 #define USB_CAP_TYPE_EXT                2
 712
 713 struct usb_ext_cap_descriptor {         /* Link Power Management */
 714         __u8  bLength;
 715         __u8  bDescriptorType;
 716         __u8  bDevCapabilityType;
 717         __u8  bmAttributes;
 718 #define USB_LPM_SUPPORT                 (1 << 1)        /* supports LPM */
 719 } __attribute__((packed));
 720
 721 /*-------------------------------------------------------------------------*/
 722
 723 /* USB_DT_WIRELESS_ENDPOINT_COMP:  companion descriptor associated with
 724  * each endpoint descriptor for a wireless device
 725  */
 726 struct usb_wireless_ep_comp_descriptor {
 727         __u8  bLength;
 728         __u8  bDescriptorType;
 729
 730         __u8  bMaxBurst;
 731         __u8  bMaxSequence;
 732         __le16 wMaxStreamDelay;
 733         __le16 wOverTheAirPacketSize;
 734         __u8  bOverTheAirInterval;
 735         __u8  bmCompAttributes;
 736 #define USB_ENDPOINT_SWITCH_MASK        0x03    /* in bmCompAttributes */
 737 #define USB_ENDPOINT_SWITCH_NO          0
 738 #define USB_ENDPOINT_SWITCH_SWITCH      1
 739 #define USB_ENDPOINT_SWITCH_SCALE       2
 740 } __attribute__((packed));
 741
 742 /*-------------------------------------------------------------------------*/
 743
 744 /* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
 745  * host and a device for connection set up, mutual authentication, and
 746  * exchanging short lived session keys.  The handshake depends on a CC.
 747  */
 748 struct usb_handshake {
 749         __u8 bMessageNumber;
 750         __u8 bStatus;
 751         __u8 tTKID[3];
 752         __u8 bReserved;
 753         __u8 CDID[16];
 754         __u8 nonce[16];
 755         __u8 MIC[8];
 756 } __attribute__((packed));
 757
 758 /*-------------------------------------------------------------------------*/
 759
 760 /* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
 761  * A CC may also be set up using non-wireless secure channels (including
 762  * wired USB!), and some devices may support CCs with multiple hosts.
 763  */
 764 struct usb_connection_context {
 765         __u8 CHID[16];          /* persistent host id */
 766         __u8 CDID[16];          /* device id (unique w/in host context) */
 767         __u8 CK[16];            /* connection key */
 768 } __attribute__((packed));
 769
 770 /*-------------------------------------------------------------------------*/
 771
 772 /* USB 2.0 defines three speeds, here's how Linux identifies them */
 773
 774 enum usb_device_speed {
 775         USB_SPEED_UNKNOWN = 0,                  /* enumerating */
 776         USB_SPEED_LOW, USB_SPEED_FULL,          /* usb 1.1 */
 777         USB_SPEED_HIGH,                         /* usb 2.0 */
 778         USB_SPEED_VARIABLE,                     /* wireless (usb 2.5) */
 779         USB_SPEED_SUPER,                        /* usb 3.0 */
 780 };
 781
 782 enum usb_device_state {
 783         /* NOTATTACHED isn't in the USB spec, and this state acts
 784          * the same as ATTACHED ... but it's clearer this way.
 785          */
 786         USB_STATE_NOTATTACHED = 0,
 787
 788         /* chapter 9 and authentication (wireless) device states */
 789         USB_STATE_ATTACHED,
 790         USB_STATE_POWERED,                      /* wired */
 791         USB_STATE_RECONNECTING,                 /* auth */
 792         USB_STATE_UNAUTHENTICATED,              /* auth */
 793         USB_STATE_DEFAULT,                      /* limited function */
 794         USB_STATE_ADDRESS,
 795         USB_STATE_CONFIGURED,                   /* most functions */
 796
 797         USB_STATE_SUSPENDED
 798
 799         /* NOTE:  there are actually four different SUSPENDED
 800          * states, returning to POWERED, DEFAULT, ADDRESS, or
 801          * CONFIGURED respectively when SOF tokens flow again.
 802          * At this level there's no difference between L1 and L2
 803          * suspend states.  (L2 being original USB 1.1 suspend.)
 804          */
 805 };
 806
 807 #endif /* __LINUX_USB_CH9_H */