include/linux/usb/cdc.h

   1 /*
   2  * USB Communications Device Class (CDC) definitions
   3  *
   4  * CDC says how to talk to lots of different types of network adapters,
   5  * notably ethernet adapters and various modems.  It's used mostly with
   6  * firmware based USB peripherals.
   7  */
   8
   9 #ifndef __LINUX_USB_CDC_H
  10 #define __LINUX_USB_CDC_H
  11
  12 #include <linux/types.h>
  13
  14 #define USB_CDC_SUBCLASS_ACM                    0x02
  15 #define USB_CDC_SUBCLASS_ETHERNET               0x06
  16 #define USB_CDC_SUBCLASS_WHCM                   0x08
  17 #define USB_CDC_SUBCLASS_DMM                    0x09
  18 #define USB_CDC_SUBCLASS_MDLM                   0x0a
  19 #define USB_CDC_SUBCLASS_OBEX                   0x0b
  20 #define USB_CDC_SUBCLASS_EEM                    0x0c
  21 #define USB_CDC_SUBCLASS_NCM                    0x0d
  22
  23 #define USB_CDC_PROTO_NONE                      0
  24
  25 #define USB_CDC_ACM_PROTO_AT_V25TER             1
  26 #define USB_CDC_ACM_PROTO_AT_PCCA101            2
  27 #define USB_CDC_ACM_PROTO_AT_PCCA101_WAKE       3
  28 #define USB_CDC_ACM_PROTO_AT_GSM                4
  29 #define USB_CDC_ACM_PROTO_AT_3G                 5
  30 #define USB_CDC_ACM_PROTO_AT_CDMA               6
  31 #define USB_CDC_ACM_PROTO_VENDOR                0xff
  32
  33 #define USB_CDC_PROTO_EEM                       7
  34
  35 #define USB_CDC_NCM_PROTO_NTB                   1
  36
  37 /*-------------------------------------------------------------------------*/
  38
  39 /*
  40  * Class-Specific descriptors ... there are a couple dozen of them
  41  */
  42
  43 #define USB_CDC_HEADER_TYPE             0x00    /* header_desc */
  44 #define USB_CDC_CALL_MANAGEMENT_TYPE    0x01    /* call_mgmt_descriptor */
  45 #define USB_CDC_ACM_TYPE                0x02    /* acm_descriptor */
  46 #define USB_CDC_UNION_TYPE              0x06    /* union_desc */
  47 #define USB_CDC_COUNTRY_TYPE            0x07
  48 #define USB_CDC_NETWORK_TERMINAL_TYPE   0x0a    /* network_terminal_desc */
  49 #define USB_CDC_ETHERNET_TYPE           0x0f    /* ether_desc */
  50 #define USB_CDC_WHCM_TYPE               0x11
  51 #define USB_CDC_MDLM_TYPE               0x12    /* mdlm_desc */
  52 #define USB_CDC_MDLM_DETAIL_TYPE        0x13    /* mdlm_detail_desc */
  53 #define USB_CDC_DMM_TYPE                0x14
  54 #define USB_CDC_OBEX_TYPE               0x15
  55 #define USB_CDC_NCM_TYPE                0x1a
  56
  57 /* "Header Functional Descriptor" from CDC spec  5.2.3.1 */
  58 struct usb_cdc_header_desc {
  59         __u8    bLength;
  60         __u8    bDescriptorType;
  61         __u8    bDescriptorSubType;
  62
  63         __le16  bcdCDC;
  64 } __attribute__ ((packed));
  65
  66 /* "Call Management Descriptor" from CDC spec  5.2.3.2 */
  67 struct usb_cdc_call_mgmt_descriptor {
  68         __u8    bLength;
  69         __u8    bDescriptorType;
  70         __u8    bDescriptorSubType;
  71
  72         __u8    bmCapabilities;
  73 #define USB_CDC_CALL_MGMT_CAP_CALL_MGMT         0x01
  74 #define USB_CDC_CALL_MGMT_CAP_DATA_INTF         0x02
  75
  76         __u8    bDataInterface;
  77 } __attribute__ ((packed));
  78
  79 /* "Abstract Control Management Descriptor" from CDC spec  5.2.3.3 */
  80 struct usb_cdc_acm_descriptor {
  81         __u8    bLength;
  82         __u8    bDescriptorType;
  83         __u8    bDescriptorSubType;
  84
  85         __u8    bmCapabilities;
  86 } __attribute__ ((packed));
  87
  88 /* capabilities from 5.2.3.3 */
  89
  90 #define USB_CDC_COMM_FEATURE    0x01
  91 #define USB_CDC_CAP_LINE        0x02
  92 #define USB_CDC_CAP_BRK         0x04
  93 #define USB_CDC_CAP_NOTIFY      0x08
  94
  95 /* "Union Functional Descriptor" from CDC spec 5.2.3.8 */
  96 struct usb_cdc_union_desc {
  97         __u8    bLength;
  98         __u8    bDescriptorType;
  99         __u8    bDescriptorSubType;
 100
 101         __u8    bMasterInterface0;
 102         __u8    bSlaveInterface0;
 103         /* ... and there could be other slave interfaces */
 104 } __attribute__ ((packed));
 105
 106 /* "Country Selection Functional Descriptor" from CDC spec 5.2.3.9 */
 107 struct usb_cdc_country_functional_desc {
 108         __u8    bLength;
 109         __u8    bDescriptorType;
 110         __u8    bDescriptorSubType;
 111
 112         __u8    iCountryCodeRelDate;
 113         __le16  wCountyCode0;
 114         /* ... and there can be a lot of country codes */
 115 } __attribute__ ((packed));
 116
 117 /* "Network Channel Terminal Functional Descriptor" from CDC spec 5.2.3.11 */
 118 struct usb_cdc_network_terminal_desc {
 119         __u8    bLength;
 120         __u8    bDescriptorType;
 121         __u8    bDescriptorSubType;
 122
 123         __u8    bEntityId;
 124         __u8    iName;
 125         __u8    bChannelIndex;
 126         __u8    bPhysicalInterface;
 127 } __attribute__ ((packed));
 128
 129 /* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */
 130 struct usb_cdc_ether_desc {
 131         __u8    bLength;
 132         __u8    bDescriptorType;
 133         __u8    bDescriptorSubType;
 134
 135         __u8    iMACAddress;
 136         __le32  bmEthernetStatistics;
 137         __le16  wMaxSegmentSize;
 138         __le16  wNumberMCFilters;
 139         __u8    bNumberPowerFilters;
 140 } __attribute__ ((packed));
 141
 142 /* "Telephone Control Model Functional Descriptor" from CDC WMC spec 6.3..3 */
 143 struct usb_cdc_dmm_desc {
 144         __u8    bFunctionLength;
 145         __u8    bDescriptorType;
 146         __u8    bDescriptorSubtype;
 147         __u16   bcdVersion;
 148         __le16  wMaxCommand;
 149 } __attribute__ ((packed));
 150
 151 /* "MDLM Functional Descriptor" from CDC WMC spec 6.7.2.3 */
 152 struct usb_cdc_mdlm_desc {
 153         __u8    bLength;
 154         __u8    bDescriptorType;
 155         __u8    bDescriptorSubType;
 156
 157         __le16  bcdVersion;
 158         __u8    bGUID[16];
 159 } __attribute__ ((packed));
 160
 161 /* "MDLM Detail Functional Descriptor" from CDC WMC spec 6.7.2.4 */
 162 struct usb_cdc_mdlm_detail_desc {
 163         __u8    bLength;
 164         __u8    bDescriptorType;
 165         __u8    bDescriptorSubType;
 166
 167         /* type is associated with mdlm_desc.bGUID */
 168         __u8    bGuidDescriptorType;
 169         __u8    bDetailData[0];
 170 } __attribute__ ((packed));
 171
 172 /* "OBEX Control Model Functional Descriptor" */
 173 struct usb_cdc_obex_desc {
 174         __u8    bLength;
 175         __u8    bDescriptorType;
 176         __u8    bDescriptorSubType;
 177
 178         __le16  bcdVersion;
 179 } __attribute__ ((packed));
 180
 181 /* "NCM Control Model Functional Descriptor" */
 182 struct usb_cdc_ncm_desc {
 183         __u8    bLength;
 184         __u8    bDescriptorType;
 185         __u8    bDescriptorSubType;
 186
 187         __le16  bcdNcmVersion;
 188         __u8    bmNetworkCapabilities;
 189 } __attribute__ ((packed));
 190 /*-------------------------------------------------------------------------*/
 191
 192 /*
 193  * Class-Specific Control Requests (6.2)
 194  *
 195  * section 3.6.2.1 table 4 has the ACM profile, for modems.
 196  * section 3.8.2 table 10 has the ethernet profile.
 197  *
 198  * Microsoft's RNDIS stack for Ethernet is a vendor-specific CDC ACM variant,
 199  * heavily dependent on the encapsulated (proprietary) command mechanism.
 200  */
 201
 202 #define USB_CDC_SEND_ENCAPSULATED_COMMAND       0x00
 203 #define USB_CDC_GET_ENCAPSULATED_RESPONSE       0x01
 204 #define USB_CDC_REQ_SET_LINE_CODING             0x20
 205 #define USB_CDC_REQ_GET_LINE_CODING             0x21
 206 #define USB_CDC_REQ_SET_CONTROL_LINE_STATE      0x22
 207 #define USB_CDC_REQ_SEND_BREAK                  0x23
 208 #define USB_CDC_SET_ETHERNET_MULTICAST_FILTERS  0x40
 209 #define USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER  0x41
 210 #define USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER  0x42
 211 #define USB_CDC_SET_ETHERNET_PACKET_FILTER      0x43
 212 #define USB_CDC_GET_ETHERNET_STATISTIC          0x44
 213 #define USB_CDC_GET_NTB_PARAMETERS              0x80
 214 #define USB_CDC_GET_NET_ADDRESS                 0x81
 215 #define USB_CDC_SET_NET_ADDRESS                 0x82
 216 #define USB_CDC_GET_NTB_FORMAT                  0x83
 217 #define USB_CDC_SET_NTB_FORMAT                  0x84
 218 #define USB_CDC_GET_NTB_INPUT_SIZE              0x85
 219 #define USB_CDC_SET_NTB_INPUT_SIZE              0x86
 220 #define USB_CDC_GET_MAX_DATAGRAM_SIZE           0x87
 221 #define USB_CDC_SET_MAX_DATAGRAM_SIZE           0x88
 222 #define USB_CDC_GET_CRC_MODE                    0x89
 223 #define USB_CDC_SET_CRC_MODE                    0x8a
 224
 225 /* Line Coding Structure from CDC spec 6.2.13 */
 226 struct usb_cdc_line_coding {
 227         __le32  dwDTERate;
 228         __u8    bCharFormat;
 229 #define USB_CDC_1_STOP_BITS                     0
 230 #define USB_CDC_1_5_STOP_BITS                   1
 231 #define USB_CDC_2_STOP_BITS                     2
 232
 233         __u8    bParityType;
 234 #define USB_CDC_NO_PARITY                       0
 235 #define USB_CDC_ODD_PARITY                      1
 236 #define USB_CDC_EVEN_PARITY                     2
 237 #define USB_CDC_MARK_PARITY                     3
 238 #define USB_CDC_SPACE_PARITY                    4
 239
 240         __u8    bDataBits;
 241 } __attribute__ ((packed));
 242
 243 /* table 62; bits in multicast filter */
 244 #define USB_CDC_PACKET_TYPE_PROMISCUOUS         (1 << 0)
 245 #define USB_CDC_PACKET_TYPE_ALL_MULTICAST       (1 << 1) /* no filter */
 246 #define USB_CDC_PACKET_TYPE_DIRECTED            (1 << 2)
 247 #define USB_CDC_PACKET_TYPE_BROADCAST           (1 << 3)
 248 #define USB_CDC_PACKET_TYPE_MULTICAST           (1 << 4) /* filtered */
 249
 250
 251 /*-------------------------------------------------------------------------*/
 252
 253 /*
 254  * Class-Specific Notifications (6.3) sent by interrupt transfers
 255  *
 256  * section 3.8.2 table 11 of the CDC spec lists Ethernet notifications
 257  * section 3.6.2.1 table 5 specifies ACM notifications, accepted by RNDIS
 258  * RNDIS also defines its own bit-incompatible notifications
 259  */
 260
 261 #define USB_CDC_NOTIFY_NETWORK_CONNECTION       0x00
 262 #define USB_CDC_NOTIFY_RESPONSE_AVAILABLE       0x01
 263 #define USB_CDC_NOTIFY_SERIAL_STATE             0x20
 264 #define USB_CDC_NOTIFY_SPEED_CHANGE             0x2a
 265
 266 struct usb_cdc_notification {
 267         __u8    bmRequestType;
 268         __u8    bNotificationType;
 269         __le16  wValue;
 270         __le16  wIndex;
 271         __le16  wLength;
 272 } __attribute__ ((packed));
 273
 274 struct usb_cdc_speed_change {
 275         __le32  DLBitRRate;     /* contains the downlink bit rate (IN pipe) */
 276         __le32  ULBitRate;      /* contains the uplink bit rate (OUT pipe) */
 277 } __attribute__ ((packed));
 278
 279 /*-------------------------------------------------------------------------*/
 280
 281 /*
 282  * Class Specific structures and constants
 283  *
 284  * CDC NCM NTB parameters structure, CDC NCM subclass 6.2.1
 285  *
 286  */
 287
 288 struct usb_cdc_ncm_ntb_parameters {
 289         __le16  wLength;
 290         __le16  bmNtbFormatsSupported;
 291         __le32  dwNtbInMaxSize;
 292         __le16  wNdpInDivisor;
 293         __le16  wNdpInPayloadRemainder;
 294         __le16  wNdpInAlignment;
 295         __le16  wPadding1;
 296         __le32  dwNtbOutMaxSize;
 297         __le16  wNdpOutDivisor;
 298         __le16  wNdpOutPayloadRemainder;
 299         __le16  wNdpOutAlignment;
 300         __le16  wNtbOutMaxDatagrams;
 301 } __attribute__ ((packed));
 302
 303 /*
 304  * CDC NCM transfer headers, CDC NCM subclass 3.2
 305  */
 306
 307 #define USB_CDC_NCM_NTH16_SIGN          0x484D434E /* NCMH */
 308 #define USB_CDC_NCM_NTH32_SIGN          0x686D636E /* ncmh */
 309
 310 struct usb_cdc_ncm_nth16 {
 311         __le32  dwSignature;
 312         __le16  wHeaderLength;
 313         __le16  wSequence;
 314         __le16  wBlockLength;
 315         __le16  wNdpIndex;
 316 } __attribute__ ((packed));
 317
 318 struct usb_cdc_ncm_nth32 {
 319         __le32  dwSignature;
 320         __le16  wHeaderLength;
 321         __le16  wSequence;
 322         __le32  dwBlockLength;
 323         __le32  dwNdpIndex;
 324 } __attribute__ ((packed));
 325
 326 /*
 327  * CDC NCM datagram pointers, CDC NCM subclass 3.3
 328  */
 329
 330 #define USB_CDC_NCM_NDP16_CRC_SIGN      0x314D434E /* NCM1 */
 331 #define USB_CDC_NCM_NDP16_NOCRC_SIGN    0x304D434E /* NCM0 */
 332 #define USB_CDC_NCM_NDP32_CRC_SIGN      0x316D636E /* ncm1 */
 333 #define USB_CDC_NCM_NDP32_NOCRC_SIGN    0x306D636E /* ncm0 */
 334
 335 /* 16-bit NCM Datagram Pointer Entry */
 336 struct usb_cdc_ncm_dpe16 {
 337         __le16  wDatagramIndex;
 338         __le16  wDatagramLength;
 339 } __attribute__((__packed__));
 340
 341 /* 16-bit NCM Datagram Pointer Table */
 342 struct usb_cdc_ncm_ndp16 {
 343         __le32  dwSignature;
 344         __le16  wLength;
 345         __le16  wNextNdpIndex;
 346         struct  usb_cdc_ncm_dpe16 dpe16[0];
 347 } __attribute__ ((packed));
 348
 349 /* 32-bit NCM Datagram Pointer Entry */
 350 struct usb_cdc_ncm_dpe32 {
 351         __le32  dwDatagramIndex;
 352         __le32  dwDatagramLength;
 353 } __attribute__((__packed__));
 354
 355 /* 32-bit NCM Datagram Pointer Table */
 356 struct usb_cdc_ncm_ndp32 {
 357         __le32  dwSignature;
 358         __le16  wLength;
 359         __le16  wReserved6;
 360         __le32  dwNextNdpIndex;
 361         __le32  dwReserved12;
 362         struct  usb_cdc_ncm_dpe32 dpe32[0];
 363 } __attribute__ ((packed));
 364
 365 /* CDC NCM subclass 3.2.1 and 3.2.2 */
 366 #define USB_CDC_NCM_NDP16_INDEX_MIN                     0x000C
 367 #define USB_CDC_NCM_NDP32_INDEX_MIN                     0x0010
 368
 369 /* CDC NCM subclass 3.3.3 Datagram Formatting */
 370 #define USB_CDC_NCM_DATAGRAM_FORMAT_CRC                 0x30
 371 #define USB_CDC_NCM_DATAGRAM_FORMAT_NOCRC               0X31
 372
 373 /* CDC NCM subclass 4.2 NCM Communications Interface Protocol Code */
 374 #define USB_CDC_NCM_PROTO_CODE_NO_ENCAP_COMMANDS        0x00
 375 #define USB_CDC_NCM_PROTO_CODE_EXTERN_PROTO             0xFE
 376
 377 /* CDC NCM subclass 5.2.1 NCM Functional Descriptor, bmNetworkCapabilities */
 378 #define USB_CDC_NCM_NCAP_ETH_FILTER                     (1 << 0)
 379 #define USB_CDC_NCM_NCAP_NET_ADDRESS                    (1 << 1)
 380 #define USB_CDC_NCM_NCAP_ENCAP_COMMAND                  (1 << 2)
 381 #define USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE              (1 << 3)
 382 #define USB_CDC_NCM_NCAP_CRC_MODE                       (1 << 4)
 383 #define USB_CDC_NCM_NCAP_NTB_INPUT_SIZE                 (1 << 5)
 384
 385 /* CDC NCM subclass Table 6-3: NTB Parameter Structure */
 386 #define USB_CDC_NCM_NTB16_SUPPORTED                     (1 << 0)
 387 #define USB_CDC_NCM_NTB32_SUPPORTED                     (1 << 1)
 388
 389 /* CDC NCM subclass Table 6-3: NTB Parameter Structure */
 390 #define USB_CDC_NCM_NDP_ALIGN_MIN_SIZE                  0x04
 391 #define USB_CDC_NCM_NTB_MAX_LENGTH                      0x1C
 392
 393 /* CDC NCM subclass 6.2.5 SetNtbFormat */
 394 #define USB_CDC_NCM_NTB16_FORMAT                        0x00
 395 #define USB_CDC_NCM_NTB32_FORMAT                        0x01
 396
 397 /* CDC NCM subclass 6.2.7 SetNtbInputSize */
 398 #define USB_CDC_NCM_NTB_MIN_IN_SIZE                     2048
 399 #define USB_CDC_NCM_NTB_MIN_OUT_SIZE                    2048
 400
 401 /* NTB Input Size Structure */
 402 struct usb_cdc_ncm_ndp_input_size {
 403         __le32  dwNtbInMaxSize;
 404         __le16  wNtbInMaxDatagrams;
 405         __le16  wReserved;
 406 } __attribute__ ((packed));
 407
 408 /* CDC NCM subclass 6.2.11 SetCrcMode */
 409 #define USB_CDC_NCM_CRC_NOT_APPENDED                    0x00
 410 #define USB_CDC_NCM_CRC_APPENDED                        0x01
 411
 412 #endif /* __LINUX_USB_CDC_H */