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 #define USB_CDC_SUBCLASS_ACM                    0x02
  13 #define USB_CDC_SUBCLASS_ETHERNET               0x06
  14 #define USB_CDC_SUBCLASS_WHCM                   0x08
  15 #define USB_CDC_SUBCLASS_DMM                    0x09
  16 #define USB_CDC_SUBCLASS_MDLM                   0x0a
  17 #define USB_CDC_SUBCLASS_OBEX                   0x0b
  18
  19 #define USB_CDC_PROTO_NONE                      0
  20
  21 #define USB_CDC_ACM_PROTO_AT_V25TER             1
  22 #define USB_CDC_ACM_PROTO_AT_PCCA101            2
  23 #define USB_CDC_ACM_PROTO_AT_PCCA101_WAKE       3
  24 #define USB_CDC_ACM_PROTO_AT_GSM                4
  25 #define USB_CDC_ACM_PROTO_AT_3G                 5
  26 #define USB_CDC_ACM_PROTO_AT_CDMA               6
  27 #define USB_CDC_ACM_PROTO_VENDOR                0xff
  28
  29 /*-------------------------------------------------------------------------*/
  30
  31 /*
  32  * Class-Specific descriptors ... there are a couple dozen of them
  33  */
  34
  35 #define USB_CDC_HEADER_TYPE             0x00    /* header_desc */
  36 #define USB_CDC_CALL_MANAGEMENT_TYPE    0x01    /* call_mgmt_descriptor */
  37 #define USB_CDC_ACM_TYPE                0x02    /* acm_descriptor */
  38 #define USB_CDC_UNION_TYPE              0x06    /* union_desc */
  39 #define USB_CDC_COUNTRY_TYPE            0x07
  40 #define USB_CDC_NETWORK_TERMINAL_TYPE   0x0a    /* network_terminal_desc */
  41 #define USB_CDC_ETHERNET_TYPE           0x0f    /* ether_desc */
  42 #define USB_CDC_WHCM_TYPE               0x11
  43 #define USB_CDC_MDLM_TYPE               0x12    /* mdlm_desc */
  44 #define USB_CDC_MDLM_DETAIL_TYPE        0x13    /* mdlm_detail_desc */
  45 #define USB_CDC_DMM_TYPE                0x14
  46 #define USB_CDC_OBEX_TYPE               0x15
  47
  48 /* "Header Functional Descriptor" from CDC spec  5.2.3.1 */
  49 struct usb_cdc_header_desc {
  50         __u8    bLength;
  51         __u8    bDescriptorType;
  52         __u8    bDescriptorSubType;
  53
  54         __le16  bcdCDC;
  55 } __attribute__ ((packed));
  56
  57 /* "Call Management Descriptor" from CDC spec  5.2.3.2 */
  58 struct usb_cdc_call_mgmt_descriptor {
  59         __u8    bLength;
  60         __u8    bDescriptorType;
  61         __u8    bDescriptorSubType;
  62
  63         __u8    bmCapabilities;
  64 #define USB_CDC_CALL_MGMT_CAP_CALL_MGMT         0x01
  65 #define USB_CDC_CALL_MGMT_CAP_DATA_INTF         0x02
  66
  67         __u8    bDataInterface;
  68 } __attribute__ ((packed));
  69
  70 /* "Abstract Control Management Descriptor" from CDC spec  5.2.3.3 */
  71 struct usb_cdc_acm_descriptor {
  72         __u8    bLength;
  73         __u8    bDescriptorType;
  74         __u8    bDescriptorSubType;
  75
  76         __u8    bmCapabilities;
  77 } __attribute__ ((packed));
  78
  79 /* capabilities from 5.2.3.3 */
  80
  81 #define USB_CDC_COMM_FEATURE    0x01
  82 #define USB_CDC_CAP_LINE        0x02
  83 #define USB_CDC_CAP_BRK 0x04
  84 #define USB_CDC_CAP_NOTIFY      0x08
  85
  86 /* "Union Functional Descriptor" from CDC spec 5.2.3.8 */
  87 struct usb_cdc_union_desc {
  88         __u8    bLength;
  89         __u8    bDescriptorType;
  90         __u8    bDescriptorSubType;
  91
  92         __u8    bMasterInterface0;
  93         __u8    bSlaveInterface0;
  94         /* ... and there could be other slave interfaces */
  95 } __attribute__ ((packed));
  96
  97 /* "Country Selection Functional Descriptor" from CDC spec 5.2.3.9 */
  98 struct usb_cdc_country_functional_desc {
  99         __u8    bLength;
 100         __u8    bDescriptorType;
 101         __u8    bDescriptorSubType;
 102
 103         __u8    iCountryCodeRelDate;
 104         __le16  wCountyCode0;
 105         /* ... and there can be a lot of country codes */
 106 } __attribute__ ((packed));
 107
 108 /* "Network Channel Terminal Functional Descriptor" from CDC spec 5.2.3.11 */
 109 struct usb_cdc_network_terminal_desc {
 110         __u8    bLength;
 111         __u8    bDescriptorType;
 112         __u8    bDescriptorSubType;
 113
 114         __u8    bEntityId;
 115         __u8    iName;
 116         __u8    bChannelIndex;
 117         __u8    bPhysicalInterface;
 118 } __attribute__ ((packed));
 119
 120 /* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */
 121 struct usb_cdc_ether_desc {
 122         __u8    bLength;
 123         __u8    bDescriptorType;
 124         __u8    bDescriptorSubType;
 125
 126         __u8    iMACAddress;
 127         __le32  bmEthernetStatistics;
 128         __le16  wMaxSegmentSize;
 129         __le16  wNumberMCFilters;
 130         __u8    bNumberPowerFilters;
 131 } __attribute__ ((packed));
 132
 133 /* "Telephone Control Model Functional Descriptor" from CDC WMC spec 6.3..3 */
 134 struct usb_cdc_dmm_desc {
 135         __u8    bFunctionLength;
 136         __u8    bDescriptorType;
 137         __u8    bDescriptorSubtype;
 138         __u16   bcdVersion;
 139         __le16  wMaxCommand;
 140 } __attribute__ ((packed));
 141
 142 /* "MDLM Functional Descriptor" from CDC WMC spec 6.7.2.3 */
 143 struct usb_cdc_mdlm_desc {
 144         __u8    bLength;
 145         __u8    bDescriptorType;
 146         __u8    bDescriptorSubType;
 147
 148         __le16  bcdVersion;
 149         __u8    bGUID[16];
 150 } __attribute__ ((packed));
 151
 152 /* "MDLM Detail Functional Descriptor" from CDC WMC spec 6.7.2.4 */
 153 struct usb_cdc_mdlm_detail_desc {
 154         __u8    bLength;
 155         __u8    bDescriptorType;
 156         __u8    bDescriptorSubType;
 157
 158         /* type is associated with mdlm_desc.bGUID */
 159         __u8    bGuidDescriptorType;
 160         __u8    bDetailData[0];
 161 } __attribute__ ((packed));
 162
 163 /*-------------------------------------------------------------------------*/
 164
 165 /*
 166  * Class-Specific Control Requests (6.2)
 167  *
 168  * section 3.6.2.1 table 4 has the ACM profile, for modems.
 169  * section 3.8.2 table 10 has the ethernet profile.
 170  *
 171  * Microsoft's RNDIS stack for Ethernet is a vendor-specific CDC ACM variant,
 172  * heavily dependent on the encapsulated (proprietary) command mechanism.
 173  */
 174
 175 #define USB_CDC_SEND_ENCAPSULATED_COMMAND       0x00
 176 #define USB_CDC_GET_ENCAPSULATED_RESPONSE       0x01
 177 #define USB_CDC_REQ_SET_LINE_CODING             0x20
 178 #define USB_CDC_REQ_GET_LINE_CODING             0x21
 179 #define USB_CDC_REQ_SET_CONTROL_LINE_STATE      0x22
 180 #define USB_CDC_REQ_SEND_BREAK                  0x23
 181 #define USB_CDC_SET_ETHERNET_MULTICAST_FILTERS  0x40
 182 #define USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER  0x41
 183 #define USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER  0x42
 184 #define USB_CDC_SET_ETHERNET_PACKET_FILTER      0x43
 185 #define USB_CDC_GET_ETHERNET_STATISTIC          0x44
 186
 187 /* Line Coding Structure from CDC spec 6.2.13 */
 188 struct usb_cdc_line_coding {
 189         __le32  dwDTERate;
 190         __u8    bCharFormat;
 191 #define USB_CDC_1_STOP_BITS                     0
 192 #define USB_CDC_1_5_STOP_BITS                   1
 193 #define USB_CDC_2_STOP_BITS                     2
 194
 195         __u8    bParityType;
 196 #define USB_CDC_NO_PARITY                       0
 197 #define USB_CDC_ODD_PARITY                      1
 198 #define USB_CDC_EVEN_PARITY                     2
 199 #define USB_CDC_MARK_PARITY                     3
 200 #define USB_CDC_SPACE_PARITY                    4
 201
 202         __u8    bDataBits;
 203 } __attribute__ ((packed));
 204
 205 /* table 62; bits in multicast filter */
 206 #define USB_CDC_PACKET_TYPE_PROMISCUOUS         (1 << 0)
 207 #define USB_CDC_PACKET_TYPE_ALL_MULTICAST       (1 << 1) /* no filter */
 208 #define USB_CDC_PACKET_TYPE_DIRECTED            (1 << 2)
 209 #define USB_CDC_PACKET_TYPE_BROADCAST           (1 << 3)
 210 #define USB_CDC_PACKET_TYPE_MULTICAST           (1 << 4) /* filtered */
 211
 212
 213 /*-------------------------------------------------------------------------*/
 214
 215 /*
 216  * Class-Specific Notifications (6.3) sent by interrupt transfers
 217  *
 218  * section 3.8.2 table 11 of the CDC spec lists Ethernet notifications
 219  * section 3.6.2.1 table 5 specifies ACM notifications, accepted by RNDIS
 220  * RNDIS also defines its own bit-incompatible notifications
 221  */
 222
 223 #define USB_CDC_NOTIFY_NETWORK_CONNECTION       0x00
 224 #define USB_CDC_NOTIFY_RESPONSE_AVAILABLE       0x01
 225 #define USB_CDC_NOTIFY_SERIAL_STATE             0x20
 226 #define USB_CDC_NOTIFY_SPEED_CHANGE             0x2a
 227
 228 struct usb_cdc_notification {
 229         __u8    bmRequestType;
 230         __u8    bNotificationType;
 231         __le16  wValue;
 232         __le16  wIndex;
 233         __le16  wLength;
 234 } __attribute__ ((packed));
 235
 236 #endif /* __LINUX_USB_CDC_H */