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 _UAPI__LINUX_USB_CH9_H 34#define _UAPI__LINUX_USB_CH9_H 35 36#include <linux/types.h> /* __u8 etc */ 37#include <asm/byteorder.h> /* le16_to_cpu */ 38 39/*-------------------------------------------------------------------------*/ 40 41/* CONTROL REQUEST SUPPORT */ 42 43/* 44 * USB directions 45 * 46 * This bit flag is used in endpoint descriptors' bEndpointAddress field. 47 * It's also one of three fields in control requests bRequestType. 48 */ 49#define USB_DIR_OUT 0 /* to device */ 50#define USB_DIR_IN 0x80 /* to host */ 51 52/* 53 * USB types, the second of three bRequestType fields 54 */ 55#define USB_TYPE_MASK (0x03 << 5) 56#define USB_TYPE_STANDARD (0x00 << 5) 57#define USB_TYPE_CLASS (0x01 << 5) 58#define USB_TYPE_VENDOR (0x02 << 5) 59#define USB_TYPE_RESERVED (0x03 << 5) 60 61/* 62 * USB recipients, the third of three bRequestType fields 63 */ 64#define USB_RECIP_MASK 0x1f 65#define USB_RECIP_DEVICE 0x00 66#define USB_RECIP_INTERFACE 0x01 67#define USB_RECIP_ENDPOINT 0x02 68#define USB_RECIP_OTHER 0x03 69/* From Wireless USB 1.0 */ 70#define USB_RECIP_PORT 0x04 71#define USB_RECIP_RPIPE 0x05 72 73/* 74 * Standard requests, for the bRequest field of a SETUP packet. 75 * 76 * These are qualified by the bRequestType field, so that for example 77 * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved 78 * by a GET_STATUS request. 79 */ 80#define USB_REQ_GET_STATUS 0x00 81#define USB_REQ_CLEAR_FEATURE 0x01 82#define USB_REQ_SET_FEATURE 0x03 83#define USB_REQ_SET_ADDRESS 0x05 84#define USB_REQ_GET_DESCRIPTOR 0x06 85#define USB_REQ_SET_DESCRIPTOR 0x07 86#define USB_REQ_GET_CONFIGURATION 0x08 87#define USB_REQ_SET_CONFIGURATION 0x09 88#define USB_REQ_GET_INTERFACE 0x0A 89#define USB_REQ_SET_INTERFACE 0x0B 90#define USB_REQ_SYNCH_FRAME 0x0C 91#define USB_REQ_SET_SEL 0x30 92#define USB_REQ_SET_ISOCH_DELAY 0x31 93 94#define USB_REQ_SET_ENCRYPTION 0x0D /* Wireless USB */ 95#define USB_REQ_GET_ENCRYPTION 0x0E 96#define USB_REQ_RPIPE_ABORT 0x0E 97#define USB_REQ_SET_HANDSHAKE 0x0F 98#define USB_REQ_RPIPE_RESET 0x0F 99#define USB_REQ_GET_HANDSHAKE 0x10 100#define USB_REQ_SET_CONNECTION 0x11 101#define USB_REQ_SET_SECURITY_DATA 0x12 102#define USB_REQ_GET_SECURITY_DATA 0x13 103#define USB_REQ_SET_WUSB_DATA 0x14 104#define USB_REQ_LOOPBACK_DATA_WRITE 0x15 105#define USB_REQ_LOOPBACK_DATA_READ 0x16 106#define USB_REQ_SET_INTERFACE_DS 0x17 107 108/* The Link Power Management (LPM) ECN defines USB_REQ_TEST_AND_SET command, 109 * used by hubs to put ports into a new L1 suspend state, except that it 110 * forgot to define its number ... 111 */ 112 113/* 114 * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and 115 * are read as a bit array returned by USB_REQ_GET_STATUS. (So there 116 * are at most sixteen features of each type.) Hubs may also support a 117 * new USB_REQ_TEST_AND_SET_FEATURE to put ports into L1 suspend. 118 */ 119#define USB_DEVICE_SELF_POWERED 0 /* (read only) */ 120#define USB_DEVICE_REMOTE_WAKEUP 1 /* dev may initiate wakeup */ 121#define USB_DEVICE_TEST_MODE 2 /* (wired high speed only) */ 122#define USB_DEVICE_BATTERY 2 /* (wireless) */ 123#define USB_DEVICE_B_HNP_ENABLE 3 /* (otg) dev may initiate HNP */ 124#define USB_DEVICE_WUSB_DEVICE 3 /* (wireless)*/ 125#define USB_DEVICE_A_HNP_SUPPORT 4 /* (otg) RH port supports HNP */ 126#define USB_DEVICE_A_ALT_HNP_SUPPORT 5 /* (otg) other RH port does */ 127#define USB_DEVICE_DEBUG_MODE 6 /* (special devices only) */ 128 129/* 130 * Test Mode Selectors 131 * See USB 2.0 spec Table 9-7 132 */ 133#define TEST_J 1 134#define TEST_K 2 135#define TEST_SE0_NAK 3 136#define TEST_PACKET 4 137#define TEST_FORCE_EN 5 138 139/* 140 * New Feature Selectors as added by USB 3.0 141 * See USB 3.0 spec Table 9-7 142 */ 143#define USB_DEVICE_U1_ENABLE 48 /* dev may initiate U1 transition */ 144#define USB_DEVICE_U2_ENABLE 49 /* dev may initiate U2 transition */ 145#define USB_DEVICE_LTM_ENABLE 50 /* dev may send LTM */ 146#define USB_INTRF_FUNC_SUSPEND 0 /* function suspend */ 147 148#define USB_INTR_FUNC_SUSPEND_OPT_MASK 0xFF00 149/* 150 * Suspend Options, Table 9-8 USB 3.0 spec 151 */ 152#define USB_INTRF_FUNC_SUSPEND_LP (1 << (8 + 0)) 153#define USB_INTRF_FUNC_SUSPEND_RW (1 << (8 + 1)) 154 155/* 156 * Interface status, Figure 9-5 USB 3.0 spec 157 */ 158#define USB_INTRF_STAT_FUNC_RW_CAP 1 159#define USB_INTRF_STAT_FUNC_RW 2 160 161#define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */ 162 163/* Bit array elements as returned by the USB_REQ_GET_STATUS request. */ 164#define USB_DEV_STAT_U1_ENABLED 2 /* transition into U1 state */ 165#define USB_DEV_STAT_U2_ENABLED 3 /* transition into U2 state */ 166#define USB_DEV_STAT_LTM_ENABLED 4 /* Latency tolerance messages */ 167 168/** 169 * struct usb_ctrlrequest - SETUP data for a USB device control request 170 * @bRequestType: matches the USB bmRequestType field 171 * @bRequest: matches the USB bRequest field 172 * @wValue: matches the USB wValue field (le16 byte order) 173 * @wIndex: matches the USB wIndex field (le16 byte order) 174 * @wLength: matches the USB wLength field (le16 byte order) 175 * 176 * This structure is used to send control requests to a USB device. It matches 177 * the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the 178 * USB spec for a fuller description of the different fields, and what they are 179 * used for. 180 * 181 * Note that the driver for any interface can issue control requests. 182 * For most devices, interfaces don't coordinate with each other, so 183 * such requests may be made at any time. 184 */ 185struct usb_ctrlrequest { 186 __u8 bRequestType; 187 __u8 bRequest; 188 __le16 wValue; 189 __le16 wIndex; 190 __le16 wLength; 191} __attribute__ ((packed)); 192 193/*-------------------------------------------------------------------------*/ 194 195/* 196 * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or 197 * (rarely) accepted by SET_DESCRIPTOR. 198 * 199 * Note that all multi-byte values here are encoded in little endian 200 * byte order "on the wire". Within the kernel and when exposed 201 * through the Linux-USB APIs, they are not converted to cpu byte 202 * order; it is the responsibility of the client code to do this. 203 * The single exception is when device and configuration descriptors (but 204 * not other descriptors) are read from usbfs (i.e. /proc/bus/usb/BBB/DDD); 205 * in this case the fields are converted to host endianness by the kernel. 206 */ 207 208/* 209 * Descriptor types ... USB 2.0 spec table 9.5 210 */ 211#define USB_DT_DEVICE 0x01 212#define USB_DT_CONFIG 0x02 213#define USB_DT_STRING 0x03 214#define USB_DT_INTERFACE 0x04 215#define USB_DT_ENDPOINT 0x05 216#define USB_DT_DEVICE_QUALIFIER 0x06 217#define USB_DT_OTHER_SPEED_CONFIG 0x07 218#define USB_DT_INTERFACE_POWER 0x08 219/* these are from a minor usb 2.0 revision (ECN) */ 220#define USB_DT_OTG 0x09 221#define USB_DT_DEBUG 0x0a 222#define USB_DT_INTERFACE_ASSOCIATION 0x0b 223/* these are from the Wireless USB spec */ 224#define USB_DT_SECURITY 0x0c 225#define USB_DT_KEY 0x0d 226#define USB_DT_ENCRYPTION_TYPE 0x0e 227#define USB_DT_BOS 0x0f 228#define USB_DT_DEVICE_CAPABILITY 0x10 229#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11 230#define USB_DT_WIRE_ADAPTER 0x21 231#define USB_DT_RPIPE 0x22 232#define USB_DT_CS_RADIO_CONTROL 0x23 233/* From the T10 UAS specification */ 234#define USB_DT_PIPE_USAGE 0x24 235/* From the USB 3.0 spec */ 236#define USB_DT_SS_ENDPOINT_COMP 0x30 237 238/* Conventional codes for class-specific descriptors. The convention is 239 * defined in the USB "Common Class" Spec (3.11). Individual class specs 240 * are authoritative for their usage, not the "common class" writeup. 241 */ 242#define USB_DT_CS_DEVICE (USB_TYPE_CLASS | USB_DT_DEVICE) 243#define USB_DT_CS_CONFIG (USB_TYPE_CLASS | USB_DT_CONFIG) 244#define USB_DT_CS_STRING (USB_TYPE_CLASS | USB_DT_STRING) 245#define USB_DT_CS_INTERFACE (USB_TYPE_CLASS | USB_DT_INTERFACE) 246#define USB_DT_CS_ENDPOINT (USB_TYPE_CLASS | USB_DT_ENDPOINT) 247 248/* All standard descriptors have these 2 fields at the beginning */ 249struct usb_descriptor_header { 250 __u8 bLength; 251 __u8 bDescriptorType; 252} __attribute__ ((packed)); 253 254 255/*-------------------------------------------------------------------------*/ 256 257/* USB_DT_DEVICE: Device descriptor */ 258struct usb_device_descriptor { 259 __u8 bLength; 260 __u8 bDescriptorType; 261 262 __le16 bcdUSB; 263 __u8 bDeviceClass; 264 __u8 bDeviceSubClass; 265 __u8 bDeviceProtocol; 266 __u8 bMaxPacketSize0; 267 __le16 idVendor; 268 __le16 idProduct; 269 __le16 bcdDevice; 270 __u8 iManufacturer; 271 __u8 iProduct; 272 __u8 iSerialNumber; 273 __u8 bNumConfigurations; 274} __attribute__ ((packed)); 275 276#define USB_DT_DEVICE_SIZE 18 277 278 279/* 280 * Device and/or Interface Class codes 281 * as found in bDeviceClass or bInterfaceClass 282 * and defined by www.usb.org documents 283 */ 284#define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */ 285#define USB_CLASS_AUDIO 1 286#define USB_CLASS_COMM 2 287#define USB_CLASS_HID 3 288#define USB_CLASS_PHYSICAL 5 289#define USB_CLASS_STILL_IMAGE 6 290#define USB_CLASS_PRINTER 7 291#define USB_CLASS_MASS_STORAGE 8 292#define USB_CLASS_HUB 9 293#define USB_CLASS_CDC_DATA 0x0a 294#define USB_CLASS_CSCID 0x0b /* chip+ smart card */ 295#define USB_CLASS_CONTENT_SEC 0x0d /* content security */ 296#define USB_CLASS_VIDEO 0x0e 297#define USB_CLASS_WIRELESS_CONTROLLER 0xe0 298#define USB_CLASS_MISC 0xef 299#define USB_CLASS_APP_SPEC 0xfe 300#define USB_CLASS_VENDOR_SPEC 0xff 301 302#define USB_SUBCLASS_VENDOR_SPEC 0xff 303 304/*-------------------------------------------------------------------------*/ 305 306/* USB_DT_CONFIG: Configuration descriptor information. 307 * 308 * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the 309 * descriptor type is different. Highspeed-capable devices can look 310 * different depending on what speed they're currently running. Only 311 * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG 312 * descriptors. 313 */ 314struct usb_config_descriptor { 315 __u8 bLength; 316 __u8 bDescriptorType; 317 318 __le16 wTotalLength; 319 __u8 bNumInterfaces; 320 __u8 bConfigurationValue; 321 __u8 iConfiguration; 322 __u8 bmAttributes; 323 __u8 bMaxPower; 324} __attribute__ ((packed)); 325 326#define USB_DT_CONFIG_SIZE 9 327 328/* from config descriptor bmAttributes */ 329#define USB_CONFIG_ATT_ONE (1 << 7) /* must be set */ 330#define USB_CONFIG_ATT_SELFPOWER (1 << 6) /* self powered */ 331#define USB_CONFIG_ATT_WAKEUP (1 << 5) /* can wakeup */ 332#define USB_CONFIG_ATT_BATTERY (1 << 4) /* battery powered */ 333 334/*-------------------------------------------------------------------------*/ 335 336/* USB_DT_STRING: String descriptor */ 337struct usb_string_descriptor { 338 __u8 bLength; 339 __u8 bDescriptorType; 340 341 __le16 wData[1]; /* UTF-16LE encoded */ 342} __attribute__ ((packed)); 343 344/* note that "string" zero is special, it holds language codes that 345 * the device supports, not Unicode characters. 346 */ 347 348/*-------------------------------------------------------------------------*/ 349 350/* USB_DT_INTERFACE: Interface descriptor */ 351struct usb_interface_descriptor { 352 __u8 bLength; 353 __u8 bDescriptorType; 354 355 __u8 bInterfaceNumber; 356 __u8 bAlternateSetting; 357 __u8 bNumEndpoints; 358 __u8 bInterfaceClass; 359 __u8 bInterfaceSubClass; 360 __u8 bInterfaceProtocol; 361 __u8 iInterface; 362} __attribute__ ((packed)); 363 364#define USB_DT_INTERFACE_SIZE 9 365 366/*-------------------------------------------------------------------------*/ 367 368/* USB_DT_ENDPOINT: Endpoint descriptor */ 369struct usb_endpoint_descriptor { 370 __u8 bLength; 371 __u8 bDescriptorType; 372 373 __u8 bEndpointAddress; 374 __u8 bmAttributes; 375 __le16 wMaxPacketSize; 376 __u8 bInterval; 377 378 /* NOTE: these two are _only_ in audio endpoints. */ 379 /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */ 380 __u8 bRefresh; 381 __u8 bSynchAddress; 382} __attribute__ ((packed)); 383 384#define USB_DT_ENDPOINT_SIZE 7 385#define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */ 386 387 388/* 389 * Endpoints 390 */ 391#define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */ 392#define USB_ENDPOINT_DIR_MASK 0x80 393 394#define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */ 395#define USB_ENDPOINT_XFER_CONTROL 0 396#define USB_ENDPOINT_XFER_ISOC 1 397#define USB_ENDPOINT_XFER_BULK 2 398#define USB_ENDPOINT_XFER_INT 3 399#define USB_ENDPOINT_MAX_ADJUSTABLE 0x80 400 401/* The USB 3.0 spec redefines bits 5:4 of bmAttributes as interrupt ep type. */ 402#define USB_ENDPOINT_INTRTYPE 0x30 403#define USB_ENDPOINT_INTR_PERIODIC (0 << 4) 404#define USB_ENDPOINT_INTR_NOTIFICATION (1 << 4) 405 406#define USB_ENDPOINT_SYNCTYPE 0x0c 407#define USB_ENDPOINT_SYNC_NONE (0 << 2) 408#define USB_ENDPOINT_SYNC_ASYNC (1 << 2) 409#define USB_ENDPOINT_SYNC_ADAPTIVE (2 << 2) 410#define USB_ENDPOINT_SYNC_SYNC (3 << 2) 411 412#define USB_ENDPOINT_USAGE_MASK 0x30 413#define USB_ENDPOINT_USAGE_DATA 0x00 414#define USB_ENDPOINT_USAGE_FEEDBACK 0x10 415#define USB_ENDPOINT_USAGE_IMPLICIT_FB 0x20 /* Implicit feedback Data endpoint */ 416 417/*-------------------------------------------------------------------------*/ 418 419/** 420 * usb_endpoint_num - get the endpoint's number 421 * @epd: endpoint to be checked 422 * 423 * Returns @epd's number: 0 to 15. 424 */ 425static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd) 426{ 427 return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; 428} 429 430/** 431 * usb_endpoint_type - get the endpoint's transfer type 432 * @epd: endpoint to be checked 433 * 434 * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according 435 * to @epd's transfer type. 436 */ 437static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd) 438{ 439 return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; 440} 441 442/** 443 * usb_endpoint_dir_in - check if the endpoint has IN direction 444 * @epd: endpoint to be checked 445 * 446 * Returns true if the endpoint is of type IN, otherwise it returns false. 447 */ 448static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd) 449{ 450 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN); 451} 452 453/** 454 * usb_endpoint_dir_out - check if the endpoint has OUT direction 455 * @epd: endpoint to be checked 456 * 457 * Returns true if the endpoint is of type OUT, otherwise it returns false. 458 */ 459static inline int usb_endpoint_dir_out( 460 const struct usb_endpoint_descriptor *epd) 461{ 462 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT); 463} 464 465/** 466 * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type 467 * @epd: endpoint to be checked 468 * 469 * Returns true if the endpoint is of type bulk, otherwise it returns false. 470 */ 471static inline int usb_endpoint_xfer_bulk( 472 const struct usb_endpoint_descriptor *epd) 473{ 474 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == 475 USB_ENDPOINT_XFER_BULK); 476} 477 478/** 479 * usb_endpoint_xfer_control - check if the endpoint has control transfer type 480 * @epd: endpoint to be checked 481 * 482 * Returns true if the endpoint is of type control, otherwise it returns false. 483 */ 484static inline int usb_endpoint_xfer_control( 485 const struct usb_endpoint_descriptor *epd) 486{ 487 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == 488 USB_ENDPOINT_XFER_CONTROL); 489} 490 491/** 492 * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type 493 * @epd: endpoint to be checked 494 * 495 * Returns true if the endpoint is of type interrupt, otherwise it returns 496 * false. 497 */ 498static inline int usb_endpoint_xfer_int( 499 const struct usb_endpoint_descriptor *epd) 500{ 501 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == 502 USB_ENDPOINT_XFER_INT); 503} 504 505/** 506 * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type 507 * @epd: endpoint to be checked 508 * 509 * Returns true if the endpoint is of type isochronous, otherwise it returns 510 * false. 511 */ 512static inline int usb_endpoint_xfer_isoc( 513 const struct usb_endpoint_descriptor *epd) 514{ 515 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == 516 USB_ENDPOINT_XFER_ISOC); 517} 518 519/** 520 * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN 521 * @epd: endpoint to be checked 522 * 523 * Returns true if the endpoint has bulk transfer type and IN direction, 524 * otherwise it returns false. 525 */ 526static inline int usb_endpoint_is_bulk_in( 527 const struct usb_endpoint_descriptor *epd) 528{ 529 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd); 530} 531 532/** 533 * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT 534 * @epd: endpoint to be checked 535 * 536 * Returns true if the endpoint has bulk transfer type and OUT direction, 537 * otherwise it returns false. 538 */ 539static inline int usb_endpoint_is_bulk_out( 540 const struct usb_endpoint_descriptor *epd) 541{ 542 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd); 543} 544 545/** 546 * usb_endpoint_is_int_in - check if the endpoint is interrupt IN 547 * @epd: endpoint to be checked 548 * 549 * Returns true if the endpoint has interrupt transfer type and IN direction, 550 * otherwise it returns false. 551 */ 552static inline int usb_endpoint_is_int_in( 553 const struct usb_endpoint_descriptor *epd) 554{ 555 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd); 556} 557 558/** 559 * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT 560 * @epd: endpoint to be checked 561 * 562 * Returns true if the endpoint has interrupt transfer type and OUT direction, 563 * otherwise it returns false. 564 */ 565static inline int usb_endpoint_is_int_out( 566 const struct usb_endpoint_descriptor *epd) 567{ 568 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd); 569} 570 571/** 572 * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN 573 * @epd: endpoint to be checked 574 * 575 * Returns true if the endpoint has isochronous transfer type and IN direction, 576 * otherwise it returns false. 577 */ 578static inline int usb_endpoint_is_isoc_in( 579 const struct usb_endpoint_descriptor *epd) 580{ 581 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd); 582} 583 584/** 585 * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT 586 * @epd: endpoint to be checked 587 * 588 * Returns true if the endpoint has isochronous transfer type and OUT direction, 589 * otherwise it returns false. 590 */ 591static inline int usb_endpoint_is_isoc_out( 592 const struct usb_endpoint_descriptor *epd) 593{ 594 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd); 595} 596 597/** 598 * usb_endpoint_maxp - get endpoint's max packet size 599 * @epd: endpoint to be checked 600 * 601 * Returns @epd's max packet 602 */ 603static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd) 604{ 605 return __le16_to_cpu(epd->wMaxPacketSize); 606} 607 608static inline int usb_endpoint_interrupt_type( 609 const struct usb_endpoint_descriptor *epd) 610{ 611 return epd->bmAttributes & USB_ENDPOINT_INTRTYPE; 612} 613 614/*-------------------------------------------------------------------------*/ 615 616/* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */ 617struct usb_ss_ep_comp_descriptor { 618 __u8 bLength; 619 __u8 bDescriptorType; 620 621 __u8 bMaxBurst; 622 __u8 bmAttributes; 623 __le16 wBytesPerInterval; 624} __attribute__ ((packed)); 625 626#define USB_DT_SS_EP_COMP_SIZE 6 627 628/* Bits 4:0 of bmAttributes if this is a bulk endpoint */ 629static inline int 630usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp) 631{ 632 int max_streams; 633 634 if (!comp) 635 return 0; 636 637 max_streams = comp->bmAttributes & 0x1f; 638 639 if (!max_streams) 640 return 0; 641 642 max_streams = 1 << max_streams; 643 644 return max_streams; 645} 646 647/* Bits 1:0 of bmAttributes if this is an isoc endpoint */ 648#define USB_SS_MULT(p) (1 + ((p) & 0x3)) 649 650/*-------------------------------------------------------------------------*/ 651 652/* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */ 653struct usb_qualifier_descriptor { 654 __u8 bLength; 655 __u8 bDescriptorType; 656 657 __le16 bcdUSB; 658 __u8 bDeviceClass; 659 __u8 bDeviceSubClass; 660 __u8 bDeviceProtocol; 661 __u8 bMaxPacketSize0; 662 __u8 bNumConfigurations; 663 __u8 bRESERVED; 664} __attribute__ ((packed)); 665 666 667/*-------------------------------------------------------------------------*/ 668 669/* USB_DT_OTG (from OTG 1.0a supplement) */ 670struct usb_otg_descriptor { 671 __u8 bLength; 672 __u8 bDescriptorType; 673 674 __u8 bmAttributes; /* support for HNP, SRP, etc */ 675} __attribute__ ((packed)); 676 677/* from usb_otg_descriptor.bmAttributes */ 678#define USB_OTG_SRP (1 << 0) 679#define USB_OTG_HNP (1 << 1) /* swap host/device roles */ 680 681/*-------------------------------------------------------------------------*/ 682 683/* USB_DT_DEBUG: for special highspeed devices, replacing serial console */ 684struct usb_debug_descriptor { 685 __u8 bLength; 686 __u8 bDescriptorType; 687 688 /* bulk endpoints with 8 byte maxpacket */ 689 __u8 bDebugInEndpoint; 690 __u8 bDebugOutEndpoint; 691} __attribute__((packed)); 692 693/*-------------------------------------------------------------------------*/ 694 695/* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */ 696struct usb_interface_assoc_descriptor { 697 __u8 bLength; 698 __u8 bDescriptorType; 699 700 __u8 bFirstInterface; 701 __u8 bInterfaceCount; 702 __u8 bFunctionClass; 703 __u8 bFunctionSubClass; 704 __u8 bFunctionProtocol; 705 __u8 iFunction; 706} __attribute__ ((packed)); 707 708 709/*-------------------------------------------------------------------------*/ 710 711/* USB_DT_SECURITY: group of wireless security descriptors, including 712 * encryption types available for setting up a CC/association. 713 */ 714struct usb_security_descriptor { 715 __u8 bLength; 716 __u8 bDescriptorType; 717 718 __le16 wTotalLength; 719 __u8 bNumEncryptionTypes; 720} __attribute__((packed)); 721 722/*-------------------------------------------------------------------------*/ 723 724/* USB_DT_KEY: used with {GET,SET}_SECURITY_DATA; only public keys 725 * may be retrieved. 726 */ 727struct usb_key_descriptor { 728 __u8 bLength; 729 __u8 bDescriptorType; 730 731 __u8 tTKID[3]; 732 __u8 bReserved; 733 __u8 bKeyData[0]; 734} __attribute__((packed)); 735 736/*-------------------------------------------------------------------------*/ 737 738/* USB_DT_ENCRYPTION_TYPE: bundled in DT_SECURITY groups */ 739struct usb_encryption_descriptor { 740 __u8 bLength; 741 __u8 bDescriptorType; 742 743 __u8 bEncryptionType; 744#define USB_ENC_TYPE_UNSECURE 0 745#define USB_ENC_TYPE_WIRED 1 /* non-wireless mode */ 746#define USB_ENC_TYPE_CCM_1 2 /* aes128/cbc session */ 747#define USB_ENC_TYPE_RSA_1 3 /* rsa3072/sha1 auth */ 748 __u8 bEncryptionValue; /* use in SET_ENCRYPTION */ 749 __u8 bAuthKeyIndex; 750} __attribute__((packed)); 751 752 753/*-------------------------------------------------------------------------*/ 754 755/* USB_DT_BOS: group of device-level capabilities */ 756struct usb_bos_descriptor { 757 __u8 bLength; 758 __u8 bDescriptorType; 759 760 __le16 wTotalLength; 761 __u8 bNumDeviceCaps; 762} __attribute__((packed)); 763 764#define USB_DT_BOS_SIZE 5 765/*-------------------------------------------------------------------------*/ 766 767/* USB_DT_DEVICE_CAPABILITY: grouped with BOS */ 768struct usb_dev_cap_header { 769 __u8 bLength; 770 __u8 bDescriptorType; 771 __u8 bDevCapabilityType; 772} __attribute__((packed)); 773 774#define USB_CAP_TYPE_WIRELESS_USB 1 775 776struct usb_wireless_cap_descriptor { /* Ultra Wide Band */ 777 __u8 bLength; 778 __u8 bDescriptorType; 779 __u8 bDevCapabilityType; 780 781 __u8 bmAttributes; 782#define USB_WIRELESS_P2P_DRD (1 << 1) 783#define USB_WIRELESS_BEACON_MASK (3 << 2) 784#define USB_WIRELESS_BEACON_SELF (1 << 2) 785#define USB_WIRELESS_BEACON_DIRECTED (2 << 2) 786#define USB_WIRELESS_BEACON_NONE (3 << 2) 787 __le16 wPHYRates; /* bit rates, Mbps */ 788#define USB_WIRELESS_PHY_53 (1 << 0) /* always set */ 789#define USB_WIRELESS_PHY_80 (1 << 1) 790#define USB_WIRELESS_PHY_107 (1 << 2) /* always set */ 791#define USB_WIRELESS_PHY_160 (1 << 3) 792#define USB_WIRELESS_PHY_200 (1 << 4) /* always set */ 793#define USB_WIRELESS_PHY_320 (1 << 5) 794#define USB_WIRELESS_PHY_400 (1 << 6) 795#define USB_WIRELESS_PHY_480 (1 << 7) 796 __u8 bmTFITXPowerInfo; /* TFI power levels */ 797 __u8 bmFFITXPowerInfo; /* FFI power levels */ 798 __le16 bmBandGroup; 799 __u8 bReserved; 800} __attribute__((packed)); 801 802/* USB 2.0 Extension descriptor */ 803#define USB_CAP_TYPE_EXT 2 804 805struct usb_ext_cap_descriptor { /* Link Power Management */ 806 __u8 bLength; 807 __u8 bDescriptorType; 808 __u8 bDevCapabilityType; 809 __le32 bmAttributes; 810#define USB_LPM_SUPPORT (1 << 1) /* supports LPM */ 811#define USB_BESL_SUPPORT (1 << 2) /* supports BESL */ 812#define USB_BESL_BASELINE_VALID (1 << 3) /* Baseline BESL valid*/ 813#define USB_BESL_DEEP_VALID (1 << 4) /* Deep BESL valid */ 814#define USB_GET_BESL_BASELINE(p) (((p) & (0xf << 8)) >> 8) 815#define USB_GET_BESL_DEEP(p) (((p) & (0xf << 12)) >> 12) 816} __attribute__((packed)); 817 818#define USB_DT_USB_EXT_CAP_SIZE 7 819 820/* 821 * SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB 822 * specific device level capabilities 823 */ 824#define USB_SS_CAP_TYPE 3 825struct usb_ss_cap_descriptor { /* Link Power Management */ 826 __u8 bLength; 827 __u8 bDescriptorType; 828 __u8 bDevCapabilityType; 829 __u8 bmAttributes; 830#define USB_LTM_SUPPORT (1 << 1) /* supports LTM */ 831 __le16 wSpeedSupported; 832#define USB_LOW_SPEED_OPERATION (1) /* Low speed operation */ 833#define USB_FULL_SPEED_OPERATION (1 << 1) /* Full speed operation */ 834#define USB_HIGH_SPEED_OPERATION (1 << 2) /* High speed operation */ 835#define USB_5GBPS_OPERATION (1 << 3) /* Operation at 5Gbps */ 836 __u8 bFunctionalitySupport; 837 __u8 bU1devExitLat; 838 __le16 bU2DevExitLat; 839} __attribute__((packed)); 840 841#define USB_DT_USB_SS_CAP_SIZE 10 842 843/* 844 * Container ID Capability descriptor: Defines the instance unique ID used to 845 * identify the instance across all operating modes 846 */ 847#define CONTAINER_ID_TYPE 4 848struct usb_ss_container_id_descriptor { 849 __u8 bLength; 850 __u8 bDescriptorType; 851 __u8 bDevCapabilityType; 852 __u8 bReserved; 853 __u8 ContainerID[16]; /* 128-bit number */ 854} __attribute__((packed)); 855 856#define USB_DT_USB_SS_CONTN_ID_SIZE 20 857/*-------------------------------------------------------------------------*/ 858 859/* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with 860 * each endpoint descriptor for a wireless device 861 */ 862struct usb_wireless_ep_comp_descriptor { 863 __u8 bLength; 864 __u8 bDescriptorType; 865 866 __u8 bMaxBurst; 867 __u8 bMaxSequence; 868 __le16 wMaxStreamDelay; 869 __le16 wOverTheAirPacketSize; 870 __u8 bOverTheAirInterval; 871 __u8 bmCompAttributes; 872#define USB_ENDPOINT_SWITCH_MASK 0x03 /* in bmCompAttributes */ 873#define USB_ENDPOINT_SWITCH_NO 0 874#define USB_ENDPOINT_SWITCH_SWITCH 1 875#define USB_ENDPOINT_SWITCH_SCALE 2 876} __attribute__((packed)); 877 878/*-------------------------------------------------------------------------*/ 879 880/* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless 881 * host and a device for connection set up, mutual authentication, and 882 * exchanging short lived session keys. The handshake depends on a CC. 883 */ 884struct usb_handshake { 885 __u8 bMessageNumber; 886 __u8 bStatus; 887 __u8 tTKID[3]; 888 __u8 bReserved; 889 __u8 CDID[16]; 890 __u8 nonce[16]; 891 __u8 MIC[8]; 892} __attribute__((packed)); 893 894/*-------------------------------------------------------------------------*/ 895 896/* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC). 897 * A CC may also be set up using non-wireless secure channels (including 898 * wired USB!), and some devices may support CCs with multiple hosts. 899 */ 900struct usb_connection_context { 901 __u8 CHID[16]; /* persistent host id */ 902 __u8 CDID[16]; /* device id (unique w/in host context) */ 903 __u8 CK[16]; /* connection key */ 904} __attribute__((packed)); 905 906/*-------------------------------------------------------------------------*/ 907 908/* USB 2.0 defines three speeds, here's how Linux identifies them */ 909 910enum usb_device_speed { 911 USB_SPEED_UNKNOWN = 0, /* enumerating */ 912 USB_SPEED_LOW, USB_SPEED_FULL, /* usb 1.1 */ 913 USB_SPEED_HIGH, /* usb 2.0 */ 914 USB_SPEED_WIRELESS, /* wireless (usb 2.5) */ 915 USB_SPEED_SUPER, /* usb 3.0 */ 916}; 917 918 919enum usb_device_state { 920 /* NOTATTACHED isn't in the USB spec, and this state acts 921 * the same as ATTACHED ... but it's clearer this way. 922 */ 923 USB_STATE_NOTATTACHED = 0, 924 925 /* chapter 9 and authentication (wireless) device states */ 926 USB_STATE_ATTACHED, 927 USB_STATE_POWERED, /* wired */ 928 USB_STATE_RECONNECTING, /* auth */ 929 USB_STATE_UNAUTHENTICATED, /* auth */ 930 USB_STATE_DEFAULT, /* limited function */ 931 USB_STATE_ADDRESS, 932 USB_STATE_CONFIGURED, /* most functions */ 933 934 USB_STATE_SUSPENDED 935 936 /* NOTE: there are actually four different SUSPENDED 937 * states, returning to POWERED, DEFAULT, ADDRESS, or 938 * CONFIGURED respectively when SOF tokens flow again. 939 * At this level there's no difference between L1 and L2 940 * suspend states. (L2 being original USB 1.1 suspend.) 941 */ 942}; 943 944enum usb3_link_state { 945 USB3_LPM_U0 = 0, 946 USB3_LPM_U1, 947 USB3_LPM_U2, 948 USB3_LPM_U3 949}; 950 951/* 952 * A U1 timeout of 0x0 means the parent hub will reject any transitions to U1. 953 * 0xff means the parent hub will accept transitions to U1, but will not 954 * initiate a transition. 955 * 956 * A U1 timeout of 0x1 to 0x7F also causes the hub to initiate a transition to 957 * U1 after that many microseconds. Timeouts of 0x80 to 0xFE are reserved 958 * values. 959 * 960 * A U2 timeout of 0x0 means the parent hub will reject any transitions to U2. 961 * 0xff means the parent hub will accept transitions to U2, but will not 962 * initiate a transition. 963 * 964 * A U2 timeout of 0x1 to 0xFE also causes the hub to initiate a transition to 965 * U2 after N*256 microseconds. Therefore a U2 timeout value of 0x1 means a U2 966 * idle timer of 256 microseconds, 0x2 means 512 microseconds, 0xFE means 967 * 65.024ms. 968 */ 969#define USB3_LPM_DISABLED 0x0 970#define USB3_LPM_U1_MAX_TIMEOUT 0x7F 971#define USB3_LPM_U2_MAX_TIMEOUT 0xFE 972#define USB3_LPM_DEVICE_INITIATED 0xFF 973 974struct usb_set_sel_req { 975 __u8 u1_sel; 976 __u8 u1_pel; 977 __le16 u2_sel; 978 __le16 u2_pel; 979} __attribute__ ((packed)); 980 981/* 982 * The Set System Exit Latency control transfer provides one byte each for 983 * U1 SEL and U1 PEL, so the max exit latency is 0xFF. U2 SEL and U2 PEL each 984 * are two bytes long. 985 */ 986#define USB3_LPM_MAX_U1_SEL_PEL 0xFF 987#define USB3_LPM_MAX_U2_SEL_PEL 0xFFFF 988 989/*-------------------------------------------------------------------------*/ 990 991/* 992 * As per USB compliance update, a device that is actively drawing 993 * more than 100mA from USB must report itself as bus-powered in 994 * the GetStatus(DEVICE) call. 995 * http://compliance.usb.org/index.asp?UpdateFile=Electrical&Format=Standard#34 996 */ 997#define USB_SELF_POWER_VBUS_MAX_DRAW 100 998 999#endif /* _UAPI__LINUX_USB_CH9_H */ 1000