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 /*
 127  * Test Mode Selectors
 128  * See USB 2.0 spec Table 9-7
 129  */
 130 #define TEST_J          1
 131 #define TEST_K          2
 132 #define TEST_SE0_NAK    3
 133 #define TEST_PACKET     4
 134 #define TEST_FORCE_EN   5
 135
 136 /*
 137  * New Feature Selectors as added by USB 3.0
 138  * See USB 3.0 spec Table 9-6
 139  */
 140 #define USB_DEVICE_U1_ENABLE    48      /* dev may initiate U1 transition */
 141 #define USB_DEVICE_U2_ENABLE    49      /* dev may initiate U2 transition */
 142 #define USB_DEVICE_LTM_ENABLE   50      /* dev may send LTM */
 143 #define USB_INTRF_FUNC_SUSPEND  0       /* function suspend */
 144
 145 #define USB_INTR_FUNC_SUSPEND_OPT_MASK  0xFF00
 146
 147 #define USB_ENDPOINT_HALT               0       /* IN/OUT will STALL */
 148
 149 /* Bit array elements as returned by the USB_REQ_GET_STATUS request. */
 150 #define USB_DEV_STAT_U1_ENABLED         2       /* transition into U1 state */
 151 #define USB_DEV_STAT_U2_ENABLED         3       /* transition into U2 state */
 152 #define USB_DEV_STAT_LTM_ENABLED        4       /* Latency tolerance messages */
 153
 154 /**
 155  * struct usb_ctrlrequest - SETUP data for a USB device control request
 156  * @bRequestType: matches the USB bmRequestType field
 157  * @bRequest: matches the USB bRequest field
 158  * @wValue: matches the USB wValue field (le16 byte order)
 159  * @wIndex: matches the USB wIndex field (le16 byte order)
 160  * @wLength: matches the USB wLength field (le16 byte order)
 161  *
 162  * This structure is used to send control requests to a USB device.  It matches
 163  * the different fields of the USB 2.0 Spec section 9.3, table 9-2.  See the
 164  * USB spec for a fuller description of the different fields, and what they are
 165  * used for.
 166  *
 167  * Note that the driver for any interface can issue control requests.
 168  * For most devices, interfaces don't coordinate with each other, so
 169  * such requests may be made at any time.
 170  */
 171 struct usb_ctrlrequest {
 172         __u8 bRequestType;
 173         __u8 bRequest;
 174         __le16 wValue;
 175         __le16 wIndex;
 176         __le16 wLength;
 177 } __attribute__ ((packed));
 178
 179 /*-------------------------------------------------------------------------*/
 180
 181 /*
 182  * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
 183  * (rarely) accepted by SET_DESCRIPTOR.
 184  *
 185  * Note that all multi-byte values here are encoded in little endian
 186  * byte order "on the wire".  Within the kernel and when exposed
 187  * through the Linux-USB APIs, they are not converted to cpu byte
 188  * order; it is the responsibility of the client code to do this.
 189  * The single exception is when device and configuration descriptors (but
 190  * not other descriptors) are read from usbfs (i.e. /proc/bus/usb/BBB/DDD);
 191  * in this case the fields are converted to host endianness by the kernel.
 192  */
 193
 194 /*
 195  * Descriptor types ... USB 2.0 spec table 9.5
 196  */
 197 #define USB_DT_DEVICE                   0x01
 198 #define USB_DT_CONFIG                   0x02
 199 #define USB_DT_STRING                   0x03
 200 #define USB_DT_INTERFACE                0x04
 201 #define USB_DT_ENDPOINT                 0x05
 202 #define USB_DT_DEVICE_QUALIFIER         0x06
 203 #define USB_DT_OTHER_SPEED_CONFIG       0x07
 204 #define USB_DT_INTERFACE_POWER          0x08
 205 /* these are from a minor usb 2.0 revision (ECN) */
 206 #define USB_DT_OTG                      0x09
 207 #define USB_DT_DEBUG                    0x0a
 208 #define USB_DT_INTERFACE_ASSOCIATION    0x0b
 209 /* these are from the Wireless USB spec */
 210 #define USB_DT_SECURITY                 0x0c
 211 #define USB_DT_KEY                      0x0d
 212 #define USB_DT_ENCRYPTION_TYPE          0x0e
 213 #define USB_DT_BOS                      0x0f
 214 #define USB_DT_DEVICE_CAPABILITY        0x10
 215 #define USB_DT_WIRELESS_ENDPOINT_COMP   0x11
 216 #define USB_DT_WIRE_ADAPTER             0x21
 217 #define USB_DT_RPIPE                    0x22
 218 #define USB_DT_CS_RADIO_CONTROL         0x23
 219 /* From the T10 UAS specification */
 220 #define USB_DT_PIPE_USAGE               0x24
 221 /* From the USB 3.0 spec */
 222 #define USB_DT_SS_ENDPOINT_COMP         0x30
 223
 224 /* Conventional codes for class-specific descriptors.  The convention is
 225  * defined in the USB "Common Class" Spec (3.11).  Individual class specs
 226  * are authoritative for their usage, not the "common class" writeup.
 227  */
 228 #define USB_DT_CS_DEVICE                (USB_TYPE_CLASS | USB_DT_DEVICE)
 229 #define USB_DT_CS_CONFIG                (USB_TYPE_CLASS | USB_DT_CONFIG)
 230 #define USB_DT_CS_STRING                (USB_TYPE_CLASS | USB_DT_STRING)
 231 #define USB_DT_CS_INTERFACE             (USB_TYPE_CLASS | USB_DT_INTERFACE)
 232 #define USB_DT_CS_ENDPOINT              (USB_TYPE_CLASS | USB_DT_ENDPOINT)
 233
 234 /* All standard descriptors have these 2 fields at the beginning */
 235 struct usb_descriptor_header {
 236         __u8  bLength;
 237         __u8  bDescriptorType;
 238 } __attribute__ ((packed));
 239
 240
 241 /*-------------------------------------------------------------------------*/
 242
 243 /* USB_DT_DEVICE: Device descriptor */
 244 struct usb_device_descriptor {
 245         __u8  bLength;
 246         __u8  bDescriptorType;
 247
 248         __le16 bcdUSB;
 249         __u8  bDeviceClass;
 250         __u8  bDeviceSubClass;
 251         __u8  bDeviceProtocol;
 252         __u8  bMaxPacketSize0;
 253         __le16 idVendor;
 254         __le16 idProduct;
 255         __le16 bcdDevice;
 256         __u8  iManufacturer;
 257         __u8  iProduct;
 258         __u8  iSerialNumber;
 259         __u8  bNumConfigurations;
 260 } __attribute__ ((packed));
 261
 262 #define USB_DT_DEVICE_SIZE              18
 263
 264
 265 /*
 266  * Device and/or Interface Class codes
 267  * as found in bDeviceClass or bInterfaceClass
 268  * and defined by www.usb.org documents
 269  */
 270 #define USB_CLASS_PER_INTERFACE         0       /* for DeviceClass */
 271 #define USB_CLASS_AUDIO                 1
 272 #define USB_CLASS_COMM                  2
 273 #define USB_CLASS_HID                   3
 274 #define USB_CLASS_PHYSICAL              5
 275 #define USB_CLASS_STILL_IMAGE           6
 276 #define USB_CLASS_PRINTER               7
 277 #define USB_CLASS_MASS_STORAGE          8
 278 #define USB_CLASS_HUB                   9
 279 #define USB_CLASS_CDC_DATA              0x0a
 280 #define USB_CLASS_CSCID                 0x0b    /* chip+ smart card */
 281 #define USB_CLASS_CONTENT_SEC           0x0d    /* content security */
 282 #define USB_CLASS_VIDEO                 0x0e
 283 #define USB_CLASS_WIRELESS_CONTROLLER   0xe0
 284 #define USB_CLASS_MISC                  0xef
 285 #define USB_CLASS_APP_SPEC              0xfe
 286 #define USB_CLASS_VENDOR_SPEC           0xff
 287
 288 #define USB_SUBCLASS_VENDOR_SPEC        0xff
 289
 290 /*-------------------------------------------------------------------------*/
 291
 292 /* USB_DT_CONFIG: Configuration descriptor information.
 293  *
 294  * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
 295  * descriptor type is different.  Highspeed-capable devices can look
 296  * different depending on what speed they're currently running.  Only
 297  * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
 298  * descriptors.
 299  */
 300 struct usb_config_descriptor {
 301         __u8  bLength;
 302         __u8  bDescriptorType;
 303
 304         __le16 wTotalLength;
 305         __u8  bNumInterfaces;
 306         __u8  bConfigurationValue;
 307         __u8  iConfiguration;
 308         __u8  bmAttributes;
 309         __u8  bMaxPower;
 310 } __attribute__ ((packed));
 311
 312 #define USB_DT_CONFIG_SIZE              9
 313
 314 /* from config descriptor bmAttributes */
 315 #define USB_CONFIG_ATT_ONE              (1 << 7)        /* must be set */
 316 #define USB_CONFIG_ATT_SELFPOWER        (1 << 6)        /* self powered */
 317 #define USB_CONFIG_ATT_WAKEUP           (1 << 5)        /* can wakeup */
 318 #define USB_CONFIG_ATT_BATTERY          (1 << 4)        /* battery powered */
 319
 320 /*-------------------------------------------------------------------------*/
 321
 322 /* USB_DT_STRING: String descriptor */
 323 struct usb_string_descriptor {
 324         __u8  bLength;
 325         __u8  bDescriptorType;
 326
 327         __le16 wData[1];                /* UTF-16LE encoded */
 328 } __attribute__ ((packed));
 329
 330 /* note that "string" zero is special, it holds language codes that
 331  * the device supports, not Unicode characters.
 332  */
 333
 334 /*-------------------------------------------------------------------------*/
 335
 336 /* USB_DT_INTERFACE: Interface descriptor */
 337 struct usb_interface_descriptor {
 338         __u8  bLength;
 339         __u8  bDescriptorType;
 340
 341         __u8  bInterfaceNumber;
 342         __u8  bAlternateSetting;
 343         __u8  bNumEndpoints;
 344         __u8  bInterfaceClass;
 345         __u8  bInterfaceSubClass;
 346         __u8  bInterfaceProtocol;
 347         __u8  iInterface;
 348 } __attribute__ ((packed));
 349
 350 #define USB_DT_INTERFACE_SIZE           9
 351
 352 /*-------------------------------------------------------------------------*/
 353
 354 /* USB_DT_ENDPOINT: Endpoint descriptor */
 355 struct usb_endpoint_descriptor {
 356         __u8  bLength;
 357         __u8  bDescriptorType;
 358
 359         __u8  bEndpointAddress;
 360         __u8  bmAttributes;
 361         __le16 wMaxPacketSize;
 362         __u8  bInterval;
 363
 364         /* NOTE:  these two are _only_ in audio endpoints. */
 365         /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
 366         __u8  bRefresh;
 367         __u8  bSynchAddress;
 368 } __attribute__ ((packed));
 369
 370 #define USB_DT_ENDPOINT_SIZE            7
 371 #define USB_DT_ENDPOINT_AUDIO_SIZE      9       /* Audio extension */
 372
 373
 374 /*
 375  * Endpoints
 376  */
 377 #define USB_ENDPOINT_NUMBER_MASK        0x0f    /* in bEndpointAddress */
 378 #define USB_ENDPOINT_DIR_MASK           0x80
 379
 380 #define USB_ENDPOINT_SYNCTYPE           0x0c
 381 #define USB_ENDPOINT_SYNC_NONE          (0 << 2)
 382 #define USB_ENDPOINT_SYNC_ASYNC         (1 << 2)
 383 #define USB_ENDPOINT_SYNC_ADAPTIVE      (2 << 2)
 384 #define USB_ENDPOINT_SYNC_SYNC          (3 << 2)
 385
 386 #define USB_ENDPOINT_XFERTYPE_MASK      0x03    /* in bmAttributes */
 387 #define USB_ENDPOINT_XFER_CONTROL       0
 388 #define USB_ENDPOINT_XFER_ISOC          1
 389 #define USB_ENDPOINT_XFER_BULK          2
 390 #define USB_ENDPOINT_XFER_INT           3
 391 #define USB_ENDPOINT_MAX_ADJUSTABLE     0x80
 392
 393 /*-------------------------------------------------------------------------*/
 394
 395 /**
 396  * usb_endpoint_num - get the endpoint's number
 397  * @epd: endpoint to be checked
 398  *
 399  * Returns @epd's number: 0 to 15.
 400  */
 401 static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
 402 {
 403         return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 404 }
 405
 406 /**
 407  * usb_endpoint_type - get the endpoint's transfer type
 408  * @epd: endpoint to be checked
 409  *
 410  * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
 411  * to @epd's transfer type.
 412  */
 413 static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
 414 {
 415         return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
 416 }
 417
 418 /**
 419  * usb_endpoint_dir_in - check if the endpoint has IN direction
 420  * @epd: endpoint to be checked
 421  *
 422  * Returns true if the endpoint is of type IN, otherwise it returns false.
 423  */
 424 static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
 425 {
 426         return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN);
 427 }
 428
 429 /**
 430  * usb_endpoint_dir_out - check if the endpoint has OUT direction
 431  * @epd: endpoint to be checked
 432  *
 433  * Returns true if the endpoint is of type OUT, otherwise it returns false.
 434  */
 435 static inline int usb_endpoint_dir_out(
 436                                 const struct usb_endpoint_descriptor *epd)
 437 {
 438         return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT);
 439 }
 440
 441 /**
 442  * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type
 443  * @epd: endpoint to be checked
 444  *
 445  * Returns true if the endpoint is of type bulk, otherwise it returns false.
 446  */
 447 static inline int usb_endpoint_xfer_bulk(
 448                                 const struct usb_endpoint_descriptor *epd)
 449 {
 450         return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 451                 USB_ENDPOINT_XFER_BULK);
 452 }
 453
 454 /**
 455  * usb_endpoint_xfer_control - check if the endpoint has control transfer type
 456  * @epd: endpoint to be checked
 457  *
 458  * Returns true if the endpoint is of type control, otherwise it returns false.
 459  */
 460 static inline int usb_endpoint_xfer_control(
 461                                 const struct usb_endpoint_descriptor *epd)
 462 {
 463         return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 464                 USB_ENDPOINT_XFER_CONTROL);
 465 }
 466
 467 /**
 468  * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type
 469  * @epd: endpoint to be checked
 470  *
 471  * Returns true if the endpoint is of type interrupt, otherwise it returns
 472  * false.
 473  */
 474 static inline int usb_endpoint_xfer_int(
 475                                 const struct usb_endpoint_descriptor *epd)
 476 {
 477         return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 478                 USB_ENDPOINT_XFER_INT);
 479 }
 480
 481 /**
 482  * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type
 483  * @epd: endpoint to be checked
 484  *
 485  * Returns true if the endpoint is of type isochronous, otherwise it returns
 486  * false.
 487  */
 488 static inline int usb_endpoint_xfer_isoc(
 489                                 const struct usb_endpoint_descriptor *epd)
 490 {
 491         return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 492                 USB_ENDPOINT_XFER_ISOC);
 493 }
 494
 495 /**
 496  * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN
 497  * @epd: endpoint to be checked
 498  *
 499  * Returns true if the endpoint has bulk transfer type and IN direction,
 500  * otherwise it returns false.
 501  */
 502 static inline int usb_endpoint_is_bulk_in(
 503                                 const struct usb_endpoint_descriptor *epd)
 504 {
 505         return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd);
 506 }
 507
 508 /**
 509  * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT
 510  * @epd: endpoint to be checked
 511  *
 512  * Returns true if the endpoint has bulk transfer type and OUT direction,
 513  * otherwise it returns false.
 514  */
 515 static inline int usb_endpoint_is_bulk_out(
 516                                 const struct usb_endpoint_descriptor *epd)
 517 {
 518         return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd);
 519 }
 520
 521 /**
 522  * usb_endpoint_is_int_in - check if the endpoint is interrupt IN
 523  * @epd: endpoint to be checked
 524  *
 525  * Returns true if the endpoint has interrupt transfer type and IN direction,
 526  * otherwise it returns false.
 527  */
 528 static inline int usb_endpoint_is_int_in(
 529                                 const struct usb_endpoint_descriptor *epd)
 530 {
 531         return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd);
 532 }
 533
 534 /**
 535  * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT
 536  * @epd: endpoint to be checked
 537  *
 538  * Returns true if the endpoint has interrupt transfer type and OUT direction,
 539  * otherwise it returns false.
 540  */
 541 static inline int usb_endpoint_is_int_out(
 542                                 const struct usb_endpoint_descriptor *epd)
 543 {
 544         return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd);
 545 }
 546
 547 /**
 548  * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN
 549  * @epd: endpoint to be checked
 550  *
 551  * Returns true if the endpoint has isochronous transfer type and IN direction,
 552  * otherwise it returns false.
 553  */
 554 static inline int usb_endpoint_is_isoc_in(
 555                                 const struct usb_endpoint_descriptor *epd)
 556 {
 557         return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd);
 558 }
 559
 560 /**
 561  * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT
 562  * @epd: endpoint to be checked
 563  *
 564  * Returns true if the endpoint has isochronous transfer type and OUT direction,
 565  * otherwise it returns false.
 566  */
 567 static inline int usb_endpoint_is_isoc_out(
 568                                 const struct usb_endpoint_descriptor *epd)
 569 {
 570         return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd);
 571 }
 572
 573 /*-------------------------------------------------------------------------*/
 574
 575 /* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
 576 struct usb_ss_ep_comp_descriptor {
 577         __u8  bLength;
 578         __u8  bDescriptorType;
 579
 580         __u8  bMaxBurst;
 581         __u8  bmAttributes;
 582         __u16 wBytesPerInterval;
 583 } __attribute__ ((packed));
 584
 585 #define USB_DT_SS_EP_COMP_SIZE          6
 586 /* Bits 4:0 of bmAttributes if this is a bulk endpoint */
 587 #define USB_SS_MAX_STREAMS(p)           (1 << (p & 0x1f))
 588
 589 /*-------------------------------------------------------------------------*/
 590
 591 /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
 592 struct usb_qualifier_descriptor {
 593         __u8  bLength;
 594         __u8  bDescriptorType;
 595
 596         __le16 bcdUSB;
 597         __u8  bDeviceClass;
 598         __u8  bDeviceSubClass;
 599         __u8  bDeviceProtocol;
 600         __u8  bMaxPacketSize0;
 601         __u8  bNumConfigurations;
 602         __u8  bRESERVED;
 603 } __attribute__ ((packed));
 604
 605
 606 /*-------------------------------------------------------------------------*/
 607
 608 /* USB_DT_OTG (from OTG 1.0a supplement) */
 609 struct usb_otg_descriptor {
 610         __u8  bLength;
 611         __u8  bDescriptorType;
 612
 613         __u8  bmAttributes;     /* support for HNP, SRP, etc */
 614 } __attribute__ ((packed));
 615
 616 /* from usb_otg_descriptor.bmAttributes */
 617 #define USB_OTG_SRP             (1 << 0)
 618 #define USB_OTG_HNP             (1 << 1)        /* swap host/device roles */
 619
 620 /*-------------------------------------------------------------------------*/
 621
 622 /* USB_DT_DEBUG:  for special highspeed devices, replacing serial console */
 623 struct usb_debug_descriptor {
 624         __u8  bLength;
 625         __u8  bDescriptorType;
 626
 627         /* bulk endpoints with 8 byte maxpacket */
 628         __u8  bDebugInEndpoint;
 629         __u8  bDebugOutEndpoint;
 630 } __attribute__((packed));
 631
 632 /*-------------------------------------------------------------------------*/
 633
 634 /* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
 635 struct usb_interface_assoc_descriptor {
 636         __u8  bLength;
 637         __u8  bDescriptorType;
 638
 639         __u8  bFirstInterface;
 640         __u8  bInterfaceCount;
 641         __u8  bFunctionClass;
 642         __u8  bFunctionSubClass;
 643         __u8  bFunctionProtocol;
 644         __u8  iFunction;
 645 } __attribute__ ((packed));
 646
 647
 648 /*-------------------------------------------------------------------------*/
 649
 650 /* USB_DT_SECURITY:  group of wireless security descriptors, including
 651  * encryption types available for setting up a CC/association.
 652  */
 653 struct usb_security_descriptor {
 654         __u8  bLength;
 655         __u8  bDescriptorType;
 656
 657         __le16 wTotalLength;
 658         __u8  bNumEncryptionTypes;
 659 } __attribute__((packed));
 660
 661 /*-------------------------------------------------------------------------*/
 662
 663 /* USB_DT_KEY:  used with {GET,SET}_SECURITY_DATA; only public keys
 664  * may be retrieved.
 665  */
 666 struct usb_key_descriptor {
 667         __u8  bLength;
 668         __u8  bDescriptorType;
 669
 670         __u8  tTKID[3];
 671         __u8  bReserved;
 672         __u8  bKeyData[0];
 673 } __attribute__((packed));
 674
 675 /*-------------------------------------------------------------------------*/
 676
 677 /* USB_DT_ENCRYPTION_TYPE:  bundled in DT_SECURITY groups */
 678 struct usb_encryption_descriptor {
 679         __u8  bLength;
 680         __u8  bDescriptorType;
 681
 682         __u8  bEncryptionType;
 683 #define USB_ENC_TYPE_UNSECURE           0
 684 #define USB_ENC_TYPE_WIRED              1       /* non-wireless mode */
 685 #define USB_ENC_TYPE_CCM_1              2       /* aes128/cbc session */
 686 #define USB_ENC_TYPE_RSA_1              3       /* rsa3072/sha1 auth */
 687         __u8  bEncryptionValue;         /* use in SET_ENCRYPTION */
 688         __u8  bAuthKeyIndex;
 689 } __attribute__((packed));
 690
 691
 692 /*-------------------------------------------------------------------------*/
 693
 694 /* USB_DT_BOS:  group of device-level capabilities */
 695 struct usb_bos_descriptor {
 696         __u8  bLength;
 697         __u8  bDescriptorType;
 698
 699         __le16 wTotalLength;
 700         __u8  bNumDeviceCaps;
 701 } __attribute__((packed));
 702
 703 #define USB_DT_BOS_SIZE         5
 704 /*-------------------------------------------------------------------------*/
 705
 706 /* USB_DT_DEVICE_CAPABILITY:  grouped with BOS */
 707 struct usb_dev_cap_header {
 708         __u8  bLength;
 709         __u8  bDescriptorType;
 710         __u8  bDevCapabilityType;
 711 } __attribute__((packed));
 712
 713 #define USB_CAP_TYPE_WIRELESS_USB       1
 714
 715 struct usb_wireless_cap_descriptor {    /* Ultra Wide Band */
 716         __u8  bLength;
 717         __u8  bDescriptorType;
 718         __u8  bDevCapabilityType;
 719
 720         __u8  bmAttributes;
 721 #define USB_WIRELESS_P2P_DRD            (1 << 1)
 722 #define USB_WIRELESS_BEACON_MASK        (3 << 2)
 723 #define USB_WIRELESS_BEACON_SELF        (1 << 2)
 724 #define USB_WIRELESS_BEACON_DIRECTED    (2 << 2)
 725 #define USB_WIRELESS_BEACON_NONE        (3 << 2)
 726         __le16 wPHYRates;       /* bit rates, Mbps */
 727 #define USB_WIRELESS_PHY_53             (1 << 0)        /* always set */
 728 #define USB_WIRELESS_PHY_80             (1 << 1)
 729 #define USB_WIRELESS_PHY_107            (1 << 2)        /* always set */
 730 #define USB_WIRELESS_PHY_160            (1 << 3)
 731 #define USB_WIRELESS_PHY_200            (1 << 4)        /* always set */
 732 #define USB_WIRELESS_PHY_320            (1 << 5)
 733 #define USB_WIRELESS_PHY_400            (1 << 6)
 734 #define USB_WIRELESS_PHY_480            (1 << 7)
 735         __u8  bmTFITXPowerInfo; /* TFI power levels */
 736         __u8  bmFFITXPowerInfo; /* FFI power levels */
 737         __le16 bmBandGroup;
 738         __u8  bReserved;
 739 } __attribute__((packed));
 740
 741 /* USB 2.0 Extension descriptor */
 742 #define USB_CAP_TYPE_EXT                2
 743
 744 struct usb_ext_cap_descriptor {         /* Link Power Management */
 745         __u8  bLength;
 746         __u8  bDescriptorType;
 747         __u8  bDevCapabilityType;
 748         __le32 bmAttributes;
 749 #define USB_LPM_SUPPORT                 (1 << 1)        /* supports LPM */
 750 } __attribute__((packed));
 751
 752 #define USB_DT_USB_EXT_CAP_SIZE 7
 753
 754 /*
 755  * SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB
 756  * specific device level capabilities
 757  */
 758 #define         USB_SS_CAP_TYPE         3
 759 struct usb_ss_cap_descriptor {          /* Link Power Management */
 760         __u8  bLength;
 761         __u8  bDescriptorType;
 762         __u8  bDevCapabilityType;
 763         __u8  bmAttributes;
 764 #define USB_LTM_SUPPORT                 (1 << 1) /* supports LTM */
 765         __le16 wSpeedSupported;
 766 #define USB_LOW_SPEED_OPERATION         (1)      /* Low speed operation */
 767 #define USB_FULL_SPEED_OPERATION        (1 << 1) /* Full speed operation */
 768 #define USB_HIGH_SPEED_OPERATION        (1 << 2) /* High speed operation */
 769 #define USB_5GBPS_OPERATION             (1 << 3) /* Operation at 5Gbps */
 770         __u8  bFunctionalitySupport;
 771         __u8  bU1devExitLat;
 772         __le16 bU2DevExitLat;
 773 } __attribute__((packed));
 774
 775 #define USB_DT_USB_SS_CAP_SIZE  10
 776
 777 /*
 778  * Container ID Capability descriptor: Defines the instance unique ID used to
 779  * identify the instance across all operating modes
 780  */
 781 #define CONTAINER_ID_TYPE       4
 782 struct usb_ss_container_id_descriptor {
 783         __u8  bLength;
 784         __u8  bDescriptorType;
 785         __u8  bDevCapabilityType;
 786         __u8  bReserved;
 787         __u8  ContainerID[16]; /* 128-bit number */
 788 } __attribute__((packed));
 789
 790 #define USB_DT_USB_SS_CONTN_ID_SIZE     20
 791 /*-------------------------------------------------------------------------*/
 792
 793 /* USB_DT_WIRELESS_ENDPOINT_COMP:  companion descriptor associated with
 794  * each endpoint descriptor for a wireless device
 795  */
 796 struct usb_wireless_ep_comp_descriptor {
 797         __u8  bLength;
 798         __u8  bDescriptorType;
 799
 800         __u8  bMaxBurst;
 801         __u8  bMaxSequence;
 802         __le16 wMaxStreamDelay;
 803         __le16 wOverTheAirPacketSize;
 804         __u8  bOverTheAirInterval;
 805         __u8  bmCompAttributes;
 806 #define USB_ENDPOINT_SWITCH_MASK        0x03    /* in bmCompAttributes */
 807 #define USB_ENDPOINT_SWITCH_NO          0
 808 #define USB_ENDPOINT_SWITCH_SWITCH      1
 809 #define USB_ENDPOINT_SWITCH_SCALE       2
 810 } __attribute__((packed));
 811
 812 /*-------------------------------------------------------------------------*/
 813
 814 /* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
 815  * host and a device for connection set up, mutual authentication, and
 816  * exchanging short lived session keys.  The handshake depends on a CC.
 817  */
 818 struct usb_handshake {
 819         __u8 bMessageNumber;
 820         __u8 bStatus;
 821         __u8 tTKID[3];
 822         __u8 bReserved;
 823         __u8 CDID[16];
 824         __u8 nonce[16];
 825         __u8 MIC[8];
 826 } __attribute__((packed));
 827
 828 /*-------------------------------------------------------------------------*/
 829
 830 /* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
 831  * A CC may also be set up using non-wireless secure channels (including
 832  * wired USB!), and some devices may support CCs with multiple hosts.
 833  */
 834 struct usb_connection_context {
 835         __u8 CHID[16];          /* persistent host id */
 836         __u8 CDID[16];          /* device id (unique w/in host context) */
 837         __u8 CK[16];            /* connection key */
 838 } __attribute__((packed));
 839
 840 /*-------------------------------------------------------------------------*/
 841
 842 /* USB 2.0 defines three speeds, here's how Linux identifies them */
 843
 844 enum usb_device_speed {
 845         USB_SPEED_UNKNOWN = 0,                  /* enumerating */
 846         USB_SPEED_LOW, USB_SPEED_FULL,          /* usb 1.1 */
 847         USB_SPEED_HIGH,                         /* usb 2.0 */
 848         USB_SPEED_WIRELESS,                     /* wireless (usb 2.5) */
 849         USB_SPEED_SUPER,                        /* usb 3.0 */
 850 };
 851
 852 enum usb_device_state {
 853         /* NOTATTACHED isn't in the USB spec, and this state acts
 854          * the same as ATTACHED ... but it's clearer this way.
 855          */
 856         USB_STATE_NOTATTACHED = 0,
 857
 858         /* chapter 9 and authentication (wireless) device states */
 859         USB_STATE_ATTACHED,
 860         USB_STATE_POWERED,                      /* wired */
 861         USB_STATE_RECONNECTING,                 /* auth */
 862         USB_STATE_UNAUTHENTICATED,              /* auth */
 863         USB_STATE_DEFAULT,                      /* limited function */
 864         USB_STATE_ADDRESS,
 865         USB_STATE_CONFIGURED,                   /* most functions */
 866
 867         USB_STATE_SUSPENDED
 868
 869         /* NOTE:  there are actually four different SUSPENDED
 870          * states, returning to POWERED, DEFAULT, ADDRESS, or
 871          * CONFIGURED respectively when SOF tokens flow again.
 872          * At this level there's no difference between L1 and L2
 873          * suspend states.  (L2 being original USB 1.1 suspend.)
 874          */
 875 };
 876
 877 /*-------------------------------------------------------------------------*/
 878
 879 /*
 880  * As per USB compliance update, a device that is actively drawing
 881  * more than 100mA from USB must report itself as bus-powered in
 882  * the GetStatus(DEVICE) call.
 883  * http://compliance.usb.org/index.asp?UpdateFile=Electrical&Format=Standard#34
 884  */
 885 #define USB_SELF_POWER_VBUS_MAX_DRAW            100
 886
 887 #endif /* __LINUX_USB_CH9_H */