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 /*-------------------------------------------------------------------------*/ 36 37 /* 38 * Class-Specific descriptors ... there are a couple dozen of them 39 */ 40 41 #define USB_CDC_HEADER_TYPE 0x00 /* header_desc */ 42 #define USB_CDC_CALL_MANAGEMENT_TYPE 0x01 /* call_mgmt_descriptor */ 43 #define USB_CDC_ACM_TYPE 0x02 /* acm_descriptor */ 44 #define USB_CDC_UNION_TYPE 0x06 /* union_desc */ 45 #define USB_CDC_COUNTRY_TYPE 0x07 46 #define USB_CDC_NETWORK_TERMINAL_TYPE 0x0a /* network_terminal_desc */ 47 #define USB_CDC_ETHERNET_TYPE 0x0f /* ether_desc */ 48 #define USB_CDC_WHCM_TYPE 0x11 49 #define USB_CDC_MDLM_TYPE 0x12 /* mdlm_desc */ 50 #define USB_CDC_MDLM_DETAIL_TYPE 0x13 /* mdlm_detail_desc */ 51 #define USB_CDC_DMM_TYPE 0x14 52 #define USB_CDC_OBEX_TYPE 0x15 53 #define USB_CDC_NCM_TYPE 0x1a 54 55 /* "Header Functional Descriptor" from CDC spec 5.2.3.1 */ 56 struct usb_cdc_header_desc { 57 __u8 bLength; 58 __u8 bDescriptorType; 59 __u8 bDescriptorSubType; 60 61 __le16 bcdCDC; 62 } __attribute__ ((packed)); 63 64 /* "Call Management Descriptor" from CDC spec 5.2.3.2 */ 65 struct usb_cdc_call_mgmt_descriptor { 66 __u8 bLength; 67 __u8 bDescriptorType; 68 __u8 bDescriptorSubType; 69 70 __u8 bmCapabilities; 71 #define USB_CDC_CALL_MGMT_CAP_CALL_MGMT 0x01 72 #define USB_CDC_CALL_MGMT_CAP_DATA_INTF 0x02 73 74 __u8 bDataInterface; 75 } __attribute__ ((packed)); 76 77 /* "Abstract Control Management Descriptor" from CDC spec 5.2.3.3 */ 78 struct usb_cdc_acm_descriptor { 79 __u8 bLength; 80 __u8 bDescriptorType; 81 __u8 bDescriptorSubType; 82 83 __u8 bmCapabilities; 84 } __attribute__ ((packed)); 85 86 /* capabilities from 5.2.3.3 */ 87 88 #define USB_CDC_COMM_FEATURE 0x01 89 #define USB_CDC_CAP_LINE 0x02 90 #define USB_CDC_CAP_BRK 0x04 91 #define USB_CDC_CAP_NOTIFY 0x08 92 93 /* "Union Functional Descriptor" from CDC spec 5.2.3.8 */ 94 struct usb_cdc_union_desc { 95 __u8 bLength; 96 __u8 bDescriptorType; 97 __u8 bDescriptorSubType; 98 99 __u8 bMasterInterface0; 100 __u8 bSlaveInterface0; 101 /* ... and there could be other slave interfaces */ 102 } __attribute__ ((packed)); 103 104 /* "Country Selection Functional Descriptor" from CDC spec 5.2.3.9 */ 105 struct usb_cdc_country_functional_desc { 106 __u8 bLength; 107 __u8 bDescriptorType; 108 __u8 bDescriptorSubType; 109 110 __u8 iCountryCodeRelDate; 111 __le16 wCountyCode0; 112 /* ... and there can be a lot of country codes */ 113 } __attribute__ ((packed)); 114 115 /* "Network Channel Terminal Functional Descriptor" from CDC spec 5.2.3.11 */ 116 struct usb_cdc_network_terminal_desc { 117 __u8 bLength; 118 __u8 bDescriptorType; 119 __u8 bDescriptorSubType; 120 121 __u8 bEntityId; 122 __u8 iName; 123 __u8 bChannelIndex; 124 __u8 bPhysicalInterface; 125 } __attribute__ ((packed)); 126 127 /* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */ 128 struct usb_cdc_ether_desc { 129 __u8 bLength; 130 __u8 bDescriptorType; 131 __u8 bDescriptorSubType; 132 133 __u8 iMACAddress; 134 __le32 bmEthernetStatistics; 135 __le16 wMaxSegmentSize; 136 __le16 wNumberMCFilters; 137 __u8 bNumberPowerFilters; 138 } __attribute__ ((packed)); 139 140 /* "Telephone Control Model Functional Descriptor" from CDC WMC spec 6.3..3 */ 141 struct usb_cdc_dmm_desc { 142 __u8 bFunctionLength; 143 __u8 bDescriptorType; 144 __u8 bDescriptorSubtype; 145 __u16 bcdVersion; 146 __le16 wMaxCommand; 147 } __attribute__ ((packed)); 148 149 /* "MDLM Functional Descriptor" from CDC WMC spec 6.7.2.3 */ 150 struct usb_cdc_mdlm_desc { 151 __u8 bLength; 152 __u8 bDescriptorType; 153 __u8 bDescriptorSubType; 154 155 __le16 bcdVersion; 156 __u8 bGUID[16]; 157 } __attribute__ ((packed)); 158 159 /* "MDLM Detail Functional Descriptor" from CDC WMC spec 6.7.2.4 */ 160 struct usb_cdc_mdlm_detail_desc { 161 __u8 bLength; 162 __u8 bDescriptorType; 163 __u8 bDescriptorSubType; 164 165 /* type is associated with mdlm_desc.bGUID */ 166 __u8 bGuidDescriptorType; 167 __u8 bDetailData[0]; 168 } __attribute__ ((packed)); 169 170 /* "OBEX Control Model Functional Descriptor" */ 171 struct usb_cdc_obex_desc { 172 __u8 bLength; 173 __u8 bDescriptorType; 174 __u8 bDescriptorSubType; 175 176 __le16 bcdVersion; 177 } __attribute__ ((packed)); 178 179 /* "NCM Control Model Functional Descriptor" */ 180 struct usb_cdc_ncm_desc { 181 __u8 bLength; 182 __u8 bDescriptorType; 183 __u8 bDescriptorSubType; 184 185 __le16 bcdNcmVersion; 186 __u8 bmNetworkCapabilities; 187 } __attribute__ ((packed)); 188 /*-------------------------------------------------------------------------*/ 189 190 /* 191 * Class-Specific Control Requests (6.2) 192 * 193 * section 3.6.2.1 table 4 has the ACM profile, for modems. 194 * section 3.8.2 table 10 has the ethernet profile. 195 * 196 * Microsoft's RNDIS stack for Ethernet is a vendor-specific CDC ACM variant, 197 * heavily dependent on the encapsulated (proprietary) command mechanism. 198 */ 199 200 #define USB_CDC_SEND_ENCAPSULATED_COMMAND 0x00 201 #define USB_CDC_GET_ENCAPSULATED_RESPONSE 0x01 202 #define USB_CDC_REQ_SET_LINE_CODING 0x20 203 #define USB_CDC_REQ_GET_LINE_CODING 0x21 204 #define USB_CDC_REQ_SET_CONTROL_LINE_STATE 0x22 205 #define USB_CDC_REQ_SEND_BREAK 0x23 206 #define USB_CDC_SET_ETHERNET_MULTICAST_FILTERS 0x40 207 #define USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER 0x41 208 #define USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER 0x42 209 #define USB_CDC_SET_ETHERNET_PACKET_FILTER 0x43 210 #define USB_CDC_GET_ETHERNET_STATISTIC 0x44 211 #define USB_CDC_GET_NTB_PARAMETERS 0x80 212 #define USB_CDC_GET_NET_ADDRESS 0x81 213 #define USB_CDC_SET_NET_ADDRESS 0x82 214 #define USB_CDC_GET_NTB_FORMAT 0x83 215 #define USB_CDC_SET_NTB_FORMAT 0x84 216 #define USB_CDC_GET_NTB_INPUT_SIZE 0x85 217 #define USB_CDC_SET_NTB_INPUT_SIZE 0x86 218 #define USB_CDC_GET_MAX_DATAGRAM_SIZE 0x87 219 #define USB_CDC_SET_MAX_DATAGRAM_SIZE 0x88 220 #define USB_CDC_GET_CRC_MODE 0x89 221 #define USB_CDC_SET_CRC_MODE 0x8a 222 223 /* Line Coding Structure from CDC spec 6.2.13 */ 224 struct usb_cdc_line_coding { 225 __le32 dwDTERate; 226 __u8 bCharFormat; 227 #define USB_CDC_1_STOP_BITS 0 228 #define USB_CDC_1_5_STOP_BITS 1 229 #define USB_CDC_2_STOP_BITS 2 230 231 __u8 bParityType; 232 #define USB_CDC_NO_PARITY 0 233 #define USB_CDC_ODD_PARITY 1 234 #define USB_CDC_EVEN_PARITY 2 235 #define USB_CDC_MARK_PARITY 3 236 #define USB_CDC_SPACE_PARITY 4 237 238 __u8 bDataBits; 239 } __attribute__ ((packed)); 240 241 /* table 62; bits in multicast filter */ 242 #define USB_CDC_PACKET_TYPE_PROMISCUOUS (1 << 0) 243 #define USB_CDC_PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */ 244 #define USB_CDC_PACKET_TYPE_DIRECTED (1 << 2) 245 #define USB_CDC_PACKET_TYPE_BROADCAST (1 << 3) 246 #define USB_CDC_PACKET_TYPE_MULTICAST (1 << 4) /* filtered */ 247 248 249 /*-------------------------------------------------------------------------*/ 250 251 /* 252 * Class-Specific Notifications (6.3) sent by interrupt transfers 253 * 254 * section 3.8.2 table 11 of the CDC spec lists Ethernet notifications 255 * section 3.6.2.1 table 5 specifies ACM notifications, accepted by RNDIS 256 * RNDIS also defines its own bit-incompatible notifications 257 */ 258 259 #define USB_CDC_NOTIFY_NETWORK_CONNECTION 0x00 260 #define USB_CDC_NOTIFY_RESPONSE_AVAILABLE 0x01 261 #define USB_CDC_NOTIFY_SERIAL_STATE 0x20 262 #define USB_CDC_NOTIFY_SPEED_CHANGE 0x2a 263 264 struct usb_cdc_notification { 265 __u8 bmRequestType; 266 __u8 bNotificationType; 267 __le16 wValue; 268 __le16 wIndex; 269 __le16 wLength; 270 } __attribute__ ((packed)); 271 272 /*-------------------------------------------------------------------------*/ 273 274 /* 275 * Class Specific structures and constants 276 * 277 * CDC NCM parameter structure, CDC NCM subclass 6.2.1 278 * 279 */ 280 281 struct usb_cdc_ncm_ntb_parameter { 282 __le16 wLength; 283 __le16 bmNtbFormatSupported; 284 __le32 dwNtbInMaxSize; 285 __le16 wNdpInDivisor; 286 __le16 wNdpInPayloadRemainder; 287 __le16 wNdpInAlignment; 288 __le16 wPadding1; 289 __le32 dwNtbOutMaxSize; 290 __le16 wNdpOutDivisor; 291 __le16 wNdpOutPayloadRemainder; 292 __le16 wNdpOutAlignment; 293 __le16 wPadding2; 294 } __attribute__ ((packed)); 295 296 /* 297 * CDC NCM transfer headers, CDC NCM subclass 3.2 298 */ 299 300 #define NCM_NTH16_SIGN 0x484D434E /* NCMH */ 301 #define NCM_NTH32_SIGN 0x686D636E /* ncmh */ 302 303 struct usb_cdc_ncm_nth16 { 304 __le32 dwSignature; 305 __le16 wHeaderLength; 306 __le16 wSequence; 307 __le16 wBlockLength; 308 __le16 wFpIndex; 309 } __attribute__ ((packed)); 310 311 struct usb_cdc_ncm_nth32 { 312 __le32 dwSignature; 313 __le16 wHeaderLength; 314 __le16 wSequence; 315 __le32 dwBlockLength; 316 __le32 dwFpIndex; 317 } __attribute__ ((packed)); 318 319 /* 320 * CDC NCM datagram pointers, CDC NCM subclass 3.3 321 */ 322 323 #define NCM_NDP16_CRC_SIGN 0x314D434E /* NCM1 */ 324 #define NCM_NDP16_NOCRC_SIGN 0x304D434E /* NCM0 */ 325 #define NCM_NDP32_CRC_SIGN 0x316D636E /* ncm1 */ 326 #define NCM_NDP32_NOCRC_SIGN 0x306D636E /* ncm0 */ 327 328 struct usb_cdc_ncm_ndp16 { 329 __le32 dwSignature; 330 __le16 wLength; 331 __le16 wNextFpIndex; 332 __u8 data[0]; 333 } __attribute__ ((packed)); 334 335 struct usb_cdc_ncm_ndp32 { 336 __le32 dwSignature; 337 __le16 wLength; 338 __le16 wReserved6; 339 __le32 dwNextFpIndex; 340 __le32 dwReserved12; 341 __u8 data[0]; 342 } __attribute__ ((packed)); 343 344 #endif /* __LINUX_USB_CDC_H */ 345