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 #define USB_CDC_SUBCLASS_ACM 0x02 10 #define USB_CDC_SUBCLASS_ETHERNET 0x06 11 #define USB_CDC_SUBCLASS_WHCM 0x08 12 #define USB_CDC_SUBCLASS_DMM 0x09 13 #define USB_CDC_SUBCLASS_MDLM 0x0a 14 #define USB_CDC_SUBCLASS_OBEX 0x0b 15 16 #define USB_CDC_PROTO_NONE 0 17 18 #define USB_CDC_ACM_PROTO_AT_V25TER 1 19 #define USB_CDC_ACM_PROTO_AT_PCCA101 2 20 #define USB_CDC_ACM_PROTO_AT_PCCA101_WAKE 3 21 #define USB_CDC_ACM_PROTO_AT_GSM 4 22 #define USB_CDC_ACM_PROTO_AT_3G 5 23 #define USB_CDC_ACM_PROTO_AT_CDMA 6 24 #define USB_CDC_ACM_PROTO_VENDOR 0xff 25 26 /*-------------------------------------------------------------------------*/ 27 28 /* 29 * Class-Specific descriptors ... there are a couple dozen of them 30 */ 31 32 #define USB_CDC_HEADER_TYPE 0x00 /* header_desc */ 33 #define USB_CDC_CALL_MANAGEMENT_TYPE 0x01 /* call_mgmt_descriptor */ 34 #define USB_CDC_ACM_TYPE 0x02 /* acm_descriptor */ 35 #define USB_CDC_UNION_TYPE 0x06 /* union_desc */ 36 #define USB_CDC_COUNTRY_TYPE 0x07 37 #define USB_CDC_NETWORK_TERMINAL_TYPE 0x0a /* network_terminal_desc */ 38 #define USB_CDC_ETHERNET_TYPE 0x0f /* ether_desc */ 39 #define USB_CDC_WHCM_TYPE 0x11 40 #define USB_CDC_MDLM_TYPE 0x12 /* mdlm_desc */ 41 #define USB_CDC_MDLM_DETAIL_TYPE 0x13 /* mdlm_detail_desc */ 42 #define USB_CDC_DMM_TYPE 0x14 43 #define USB_CDC_OBEX_TYPE 0x15 44 45 /* "Header Functional Descriptor" from CDC spec 5.2.3.1 */ 46 struct usb_cdc_header_desc { 47 __u8 bLength; 48 __u8 bDescriptorType; 49 __u8 bDescriptorSubType; 50 51 __le16 bcdCDC; 52 } __attribute__ ((packed)); 53 54 /* "Call Management Descriptor" from CDC spec 5.2.3.2 */ 55 struct usb_cdc_call_mgmt_descriptor { 56 __u8 bLength; 57 __u8 bDescriptorType; 58 __u8 bDescriptorSubType; 59 60 __u8 bmCapabilities; 61 #define USB_CDC_CALL_MGMT_CAP_CALL_MGMT 0x01 62 #define USB_CDC_CALL_MGMT_CAP_DATA_INTF 0x02 63 64 __u8 bDataInterface; 65 } __attribute__ ((packed)); 66 67 /* "Abstract Control Management Descriptor" from CDC spec 5.2.3.3 */ 68 struct usb_cdc_acm_descriptor { 69 __u8 bLength; 70 __u8 bDescriptorType; 71 __u8 bDescriptorSubType; 72 73 __u8 bmCapabilities; 74 } __attribute__ ((packed)); 75 76 /* capabilities from 5.2.3.3 */ 77 78 #define USB_CDC_COMM_FEATURE 0x01 79 #define USB_CDC_CAP_LINE 0x02 80 #define USB_CDC_CAP_BRK 0x04 81 #define USB_CDC_CAP_NOTIFY 0x08 82 83 /* "Union Functional Descriptor" from CDC spec 5.2.3.8 */ 84 struct usb_cdc_union_desc { 85 __u8 bLength; 86 __u8 bDescriptorType; 87 __u8 bDescriptorSubType; 88 89 __u8 bMasterInterface0; 90 __u8 bSlaveInterface0; 91 /* ... and there could be other slave interfaces */ 92 } __attribute__ ((packed)); 93 94 /* "Network Channel Terminal Functional Descriptor" from CDC spec 5.2.3.11 */ 95 struct usb_cdc_network_terminal_desc { 96 __u8 bLength; 97 __u8 bDescriptorType; 98 __u8 bDescriptorSubType; 99 100 __u8 bEntityId; 101 __u8 iName; 102 __u8 bChannelIndex; 103 __u8 bPhysicalInterface; 104 } __attribute__ ((packed)); 105 106 /* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */ 107 struct usb_cdc_ether_desc { 108 __u8 bLength; 109 __u8 bDescriptorType; 110 __u8 bDescriptorSubType; 111 112 __u8 iMACAddress; 113 __le32 bmEthernetStatistics; 114 __le16 wMaxSegmentSize; 115 __le16 wNumberMCFilters; 116 __u8 bNumberPowerFilters; 117 } __attribute__ ((packed)); 118 119 /* "MDLM Functional Descriptor" from CDC WMC spec 6.7.2.3 */ 120 struct usb_cdc_mdlm_desc { 121 __u8 bLength; 122 __u8 bDescriptorType; 123 __u8 bDescriptorSubType; 124 125 __le16 bcdVersion; 126 __u8 bGUID[16]; 127 } __attribute__ ((packed)); 128 129 /* "MDLM Detail Functional Descriptor" from CDC WMC spec 6.7.2.4 */ 130 struct usb_cdc_mdlm_detail_desc { 131 __u8 bLength; 132 __u8 bDescriptorType; 133 __u8 bDescriptorSubType; 134 135 /* type is associated with mdlm_desc.bGUID */ 136 __u8 bGuidDescriptorType; 137 __u8 bDetailData[0]; 138 } __attribute__ ((packed)); 139 140 /*-------------------------------------------------------------------------*/ 141 142 /* 143 * Class-Specific Control Requests (6.2) 144 * 145 * section 3.6.2.1 table 4 has the ACM profile, for modems. 146 * section 3.8.2 table 10 has the ethernet profile. 147 * 148 * Microsoft's RNDIS stack for Ethernet is a vendor-specific CDC ACM variant, 149 * heavily dependent on the encapsulated (proprietary) command mechanism. 150 */ 151 152 #define USB_CDC_SEND_ENCAPSULATED_COMMAND 0x00 153 #define USB_CDC_GET_ENCAPSULATED_RESPONSE 0x01 154 #define USB_CDC_REQ_SET_LINE_CODING 0x20 155 #define USB_CDC_REQ_GET_LINE_CODING 0x21 156 #define USB_CDC_REQ_SET_CONTROL_LINE_STATE 0x22 157 #define USB_CDC_REQ_SEND_BREAK 0x23 158 #define USB_CDC_SET_ETHERNET_MULTICAST_FILTERS 0x40 159 #define USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER 0x41 160 #define USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER 0x42 161 #define USB_CDC_SET_ETHERNET_PACKET_FILTER 0x43 162 #define USB_CDC_GET_ETHERNET_STATISTIC 0x44 163 164 /* Line Coding Structure from CDC spec 6.2.13 */ 165 struct usb_cdc_line_coding { 166 __le32 dwDTERate; 167 __u8 bCharFormat; 168 #define USB_CDC_1_STOP_BITS 0 169 #define USB_CDC_1_5_STOP_BITS 1 170 #define USB_CDC_2_STOP_BITS 2 171 172 __u8 bParityType; 173 #define USB_CDC_NO_PARITY 0 174 #define USB_CDC_ODD_PARITY 1 175 #define USB_CDC_EVEN_PARITY 2 176 #define USB_CDC_MARK_PARITY 3 177 #define USB_CDC_SPACE_PARITY 4 178 179 __u8 bDataBits; 180 } __attribute__ ((packed)); 181 182 /* table 62; bits in multicast filter */ 183 #define USB_CDC_PACKET_TYPE_PROMISCUOUS (1 << 0) 184 #define USB_CDC_PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */ 185 #define USB_CDC_PACKET_TYPE_DIRECTED (1 << 2) 186 #define USB_CDC_PACKET_TYPE_BROADCAST (1 << 3) 187 #define USB_CDC_PACKET_TYPE_MULTICAST (1 << 4) /* filtered */ 188 189 190 /*-------------------------------------------------------------------------*/ 191 192 /* 193 * Class-Specific Notifications (6.3) sent by interrupt transfers 194 * 195 * section 3.8.2 table 11 of the CDC spec lists Ethernet notifications 196 * section 3.6.2.1 table 5 specifies ACM notifications, accepted by RNDIS 197 * RNDIS also defines its own bit-incompatible notifications 198 */ 199 200 #define USB_CDC_NOTIFY_NETWORK_CONNECTION 0x00 201 #define USB_CDC_NOTIFY_RESPONSE_AVAILABLE 0x01 202 #define USB_CDC_NOTIFY_SERIAL_STATE 0x20 203 #define USB_CDC_NOTIFY_SPEED_CHANGE 0x2a 204 205 struct usb_cdc_notification { 206 __u8 bmRequestType; 207 __u8 bNotificationType; 208 __le16 wValue; 209 __le16 wIndex; 210 __le16 wLength; 211 } __attribute__ ((packed)); 212 213