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/*

 * USB Communications Device Class (CDC) definitions

 *

 * CDC says how to talk to lots of different types of network adapters,

 * notably ethernet adapters and various modems.  It's used mostly with

 * firmware based USB peripherals.

 */

#define USB_CDC_SUBCLASS_ACM                    0x02

#define USB_CDC_SUBCLASS_ETHERNET               0x06

#define USB_CDC_SUBCLASS_WHCM                   0x08

#define USB_CDC_SUBCLASS_DMM                    0x09

#define USB_CDC_SUBCLASS_MDLM                   0x0a

#define USB_CDC_SUBCLASS_OBEX                   0x0b

#define USB_CDC_PROTO_NONE                      0

#define USB_CDC_ACM_PROTO_AT_V25TER             1

#define USB_CDC_ACM_PROTO_AT_PCCA101            2

#define USB_CDC_ACM_PROTO_AT_PCCA101_WAKE       3

#define USB_CDC_ACM_PROTO_AT_GSM                4

#define USB_CDC_ACM_PROTO_AT_3G                 5

#define USB_CDC_ACM_PROTO_AT_CDMA               6

#define USB_CDC_ACM_PROTO_VENDOR                0xff

/*-------------------------------------------------------------------------*/

/*

 * Class-Specific descriptors ... there are a couple dozen of them

 */

#define USB_CDC_HEADER_TYPE             0x00            /* header_desc */

#define USB_CDC_CALL_MANAGEMENT_TYPE    0x01            /* call_mgmt_descriptor */

#define USB_CDC_ACM_TYPE                0x02            /* acm_descriptor */

#define USB_CDC_UNION_TYPE              0x06            /* union_desc */

#define USB_CDC_COUNTRY_TYPE            0x07

#define USB_CDC_NETWORK_TERMINAL_TYPE   0x0a            /* network_terminal_desc */

#define USB_CDC_ETHERNET_TYPE           0x0f            /* ether_desc */

#define USB_CDC_WHCM_TYPE               0x11

#define USB_CDC_MDLM_TYPE               0x12            /* mdlm_desc */

#define USB_CDC_MDLM_DETAIL_TYPE        0x13            /* mdlm_detail_desc */

#define USB_CDC_DMM_TYPE                0x14

#define USB_CDC_OBEX_TYPE               0x15

/* "Header Functional Descriptor" from CDC spec  5.2.3.1 */

struct usb_cdc_header_desc {

        __u8    bLength;

        __u8    bDescriptorType;

        __u8    bDescriptorSubType;

        __le16  bcdCDC;

} __attribute__ ((packed));

/* "Call Management Descriptor" from CDC spec  5.2.3.2 */

struct usb_cdc_call_mgmt_descriptor {

        __u8    bLength;

        __u8    bDescriptorType;

        __u8    bDescriptorSubType;

        __u8    bmCapabilities;

#define USB_CDC_CALL_MGMT_CAP_CALL_MGMT         0x01

#define USB_CDC_CALL_MGMT_CAP_DATA_INTF         0x02

        __u8    bDataInterface;

} __attribute__ ((packed));

/* "Abstract Control Management Descriptor" from CDC spec  5.2.3.3 */

struct usb_cdc_acm_descriptor {

        __u8    bLength;

        __u8    bDescriptorType;

        __u8    bDescriptorSubType;

        __u8    bmCapabilities;

} __attribute__ ((packed));

/* capabilities from 5.2.3.3 */

#define USB_CDC_COMM_FEATURE    0x01

#define USB_CDC_CAP_LINE        0x02

#define USB_CDC_CAP_BRK 0x04

#define USB_CDC_CAP_NOTIFY      0x08

/* "Union Functional Descriptor" from CDC spec 5.2.3.8 */

struct usb_cdc_union_desc {

        __u8    bLength;

        __u8    bDescriptorType;

        __u8    bDescriptorSubType;

        __u8    bMasterInterface0;

        __u8    bSlaveInterface0;

        /* ... and there could be other slave interfaces */

} __attribute__ ((packed));

/* "Country Selection Functional Descriptor" from CDC spec 5.2.3.9 */

struct usb_cdc_country_functional_desc {

        __u8    bLength;

        __u8    bDescriptorType;

        __u8    bDescriptorSubType;

        __u8    iCountryCodeRelDate;

        __le16  wCountyCode0;

        /* ... and there can be a lot of country codes */

} __attribute__ ((packed));

/* "Network Channel Terminal Functional Descriptor" from CDC spec 5.2.3.11 */

struct usb_cdc_network_terminal_desc {

        __u8    bLength;

        __u8    bDescriptorType;

        __u8    bDescriptorSubType;

        __u8    bEntityId;

        __u8    iName;

        __u8    bChannelIndex;

        __u8    bPhysicalInterface;

} __attribute__ ((packed));

/* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */

struct usb_cdc_ether_desc {

        __u8    bLength;

        __u8    bDescriptorType;

        __u8    bDescriptorSubType;

        __u8    iMACAddress;

        __le32  bmEthernetStatistics;

        __le16  wMaxSegmentSize;

        __le16  wNumberMCFilters;

        __u8    bNumberPowerFilters;

} __attribute__ ((packed));

/* "MDLM Functional Descriptor" from CDC WMC spec 6.7.2.3 */

struct usb_cdc_mdlm_desc {

        __u8    bLength;

        __u8    bDescriptorType;

        __u8    bDescriptorSubType;

        __le16  bcdVersion;

        __u8    bGUID[16];

} __attribute__ ((packed));

/* "MDLM Detail Functional Descriptor" from CDC WMC spec 6.7.2.4 */

struct usb_cdc_mdlm_detail_desc {

        __u8    bLength;

        __u8    bDescriptorType;

        __u8    bDescriptorSubType;

        /* type is associated with mdlm_desc.bGUID */

        __u8    bGuidDescriptorType;

        __u8    bDetailData[0];

} __attribute__ ((packed));

/*-------------------------------------------------------------------------*/

/*

 * Class-Specific Control Requests (6.2)

 *

 * section 3.6.2.1 table 4 has the ACM profile, for modems.

 * section 3.8.2 table 10 has the ethernet profile.

 *

 * Microsoft's RNDIS stack for Ethernet is a vendor-specific CDC ACM variant,

 * heavily dependent on the encapsulated (proprietary) command mechanism.

 */

#define USB_CDC_SEND_ENCAPSULATED_COMMAND       0x00

#define USB_CDC_GET_ENCAPSULATED_RESPONSE       0x01

#define USB_CDC_REQ_SET_LINE_CODING             0x20

#define USB_CDC_REQ_GET_LINE_CODING             0x21

#define USB_CDC_REQ_SET_CONTROL_LINE_STATE      0x22

#define USB_CDC_REQ_SEND_BREAK                  0x23

#define USB_CDC_SET_ETHERNET_MULTICAST_FILTERS  0x40

#define USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER  0x41

#define USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER  0x42

#define USB_CDC_SET_ETHERNET_PACKET_FILTER      0x43

#define USB_CDC_GET_ETHERNET_STATISTIC          0x44

/* Line Coding Structure from CDC spec 6.2.13 */

struct usb_cdc_line_coding {

        __le32  dwDTERate;

        __u8    bCharFormat;

#define USB_CDC_1_STOP_BITS                     0

#define USB_CDC_1_5_STOP_BITS                   1

#define USB_CDC_2_STOP_BITS                     2

        __u8    bParityType;

#define USB_CDC_NO_PARITY                       0

#define USB_CDC_ODD_PARITY                      1

#define USB_CDC_EVEN_PARITY                     2

#define USB_CDC_MARK_PARITY                     3

#define USB_CDC_SPACE_PARITY                    4

        __u8    bDataBits;

} __attribute__ ((packed));

/* table 62; bits in multicast filter */

#define USB_CDC_PACKET_TYPE_PROMISCUOUS         (1 << 0)

#define USB_CDC_PACKET_TYPE_ALL_MULTICAST       (1 << 1) /* no filter */

#define USB_CDC_PACKET_TYPE_DIRECTED            (1 << 2)

#define USB_CDC_PACKET_TYPE_BROADCAST           (1 << 3)

#define USB_CDC_PACKET_TYPE_MULTICAST           (1 << 4) /* filtered */

/*-------------------------------------------------------------------------*/

/*

 * Class-Specific Notifications (6.3) sent by interrupt transfers

 *

 * section 3.8.2 table 11 of the CDC spec lists Ethernet notifications

 * section 3.6.2.1 table 5 specifies ACM notifications, accepted by RNDIS

 * RNDIS also defines its own bit-incompatible notifications

 */

#define USB_CDC_NOTIFY_NETWORK_CONNECTION       0x00

#define USB_CDC_NOTIFY_RESPONSE_AVAILABLE       0x01

#define USB_CDC_NOTIFY_SERIAL_STATE             0x20

#define USB_CDC_NOTIFY_SPEED_CHANGE             0x2a

struct usb_cdc_notification {

        __u8    bmRequestType;

        __u8    bNotificationType;

        __le16  wValue;

        __le16  wIndex;

        __le16  wLength;

} __attribute__ ((packed));