/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
* 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.
#ifndef __UAPI_LINUX_USB_CDC_H
#define __UAPI_LINUX_USB_CDC_H
#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_SUBCLASS_EEM 0x0c
#define USB_CDC_SUBCLASS_NCM 0x0d
#define USB_CDC_SUBCLASS_MBIM 0x0e
#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
#define USB_CDC_PROTO_EEM 7
#define USB_CDC_NCM_PROTO_NTB 1
#define USB_CDC_MBIM_PROTO_NTB 2
/*-------------------------------------------------------------------------*/
* 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
#define USB_CDC_NCM_TYPE 0x1a
#define USB_CDC_MBIM_TYPE 0x1b
#define USB_CDC_MBIM_EXTENDED_TYPE 0x1c
/* "Header Functional Descriptor" from CDC spec 5.2.3.1 */
struct usb_cdc_header_desc {
} __attribute__ ((packed));
/* "Call Management Descriptor" from CDC spec 5.2.3.2 */
struct usb_cdc_call_mgmt_descriptor {
#define USB_CDC_CALL_MGMT_CAP_CALL_MGMT 0x01
#define USB_CDC_CALL_MGMT_CAP_DATA_INTF 0x02
} __attribute__ ((packed));
/* "Abstract Control Management Descriptor" from CDC spec 5.2.3.3 */
struct usb_cdc_acm_descriptor {
} __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 {
/* ... 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 iCountryCodeRelDate;
/* ... 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 {
} __attribute__ ((packed));
/* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */
struct usb_cdc_ether_desc {
__le32 bmEthernetStatistics;
__u8 bNumberPowerFilters;
} __attribute__ ((packed));
/* "Telephone Control Model Functional Descriptor" from CDC WMC spec 6.3..3 */
struct usb_cdc_dmm_desc {
} __attribute__ ((packed));
/* "MDLM Functional Descriptor" from CDC WMC spec 6.7.2.3 */
struct usb_cdc_mdlm_desc {
} __attribute__ ((packed));
/* "MDLM Detail Functional Descriptor" from CDC WMC spec 6.7.2.4 */
struct usb_cdc_mdlm_detail_desc {
/* type is associated with mdlm_desc.bGUID */
__u8 bGuidDescriptorType;
} __attribute__ ((packed));
/* "OBEX Control Model Functional Descriptor" */
struct usb_cdc_obex_desc {
} __attribute__ ((packed));
/* "NCM Control Model Functional Descriptor" */
struct usb_cdc_ncm_desc {
__u8 bmNetworkCapabilities;
} __attribute__ ((packed));
/* "MBIM Control Model Functional Descriptor" */
struct usb_cdc_mbim_desc {
__le16 wMaxControlMessage;
__u8 bmNetworkCapabilities;
} __attribute__ ((packed));
/* "MBIM Extended Functional Descriptor" from CDC MBIM spec 1.0 errata-1 */
struct usb_cdc_mbim_extended_desc {
__le16 bcdMBIMExtendedVersion;
__u8 bMaxOutstandingCommandMessages;
} __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
#define USB_CDC_GET_NTB_PARAMETERS 0x80
#define USB_CDC_GET_NET_ADDRESS 0x81
#define USB_CDC_SET_NET_ADDRESS 0x82
#define USB_CDC_GET_NTB_FORMAT 0x83
#define USB_CDC_SET_NTB_FORMAT 0x84
#define USB_CDC_GET_NTB_INPUT_SIZE 0x85
#define USB_CDC_SET_NTB_INPUT_SIZE 0x86
#define USB_CDC_GET_MAX_DATAGRAM_SIZE 0x87
#define USB_CDC_SET_MAX_DATAGRAM_SIZE 0x88
#define USB_CDC_GET_CRC_MODE 0x89
#define USB_CDC_SET_CRC_MODE 0x8a
/* Line Coding Structure from CDC spec 6.2.13 */
struct usb_cdc_line_coding {
#define USB_CDC_1_STOP_BITS 0
#define USB_CDC_1_5_STOP_BITS 1
#define USB_CDC_2_STOP_BITS 2
#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
} __attribute__ ((packed));
/* Control Signal Bitmap Values from 6.2.14 SetControlLineState */
#define USB_CDC_CTRL_DTR (1 << 0)
#define USB_CDC_CTRL_RTS (1 << 1)
/* 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 {
} __attribute__ ((packed));
/* UART State Bitmap Values from 6.3.5 SerialState */
#define USB_CDC_SERIAL_STATE_DCD (1 << 0)
#define USB_CDC_SERIAL_STATE_DSR (1 << 1)
#define USB_CDC_SERIAL_STATE_BREAK (1 << 2)
#define USB_CDC_SERIAL_STATE_RING_SIGNAL (1 << 3)
#define USB_CDC_SERIAL_STATE_FRAMING (1 << 4)
#define USB_CDC_SERIAL_STATE_PARITY (1 << 5)
#define USB_CDC_SERIAL_STATE_OVERRUN (1 << 6)
struct usb_cdc_speed_change {
__le32 DLBitRRate; /* contains the downlink bit rate (IN pipe) */
__le32 ULBitRate; /* contains the uplink bit rate (OUT pipe) */
} __attribute__ ((packed));
/*-------------------------------------------------------------------------*/
* Class Specific structures and constants
* CDC NCM NTB parameters structure, CDC NCM subclass 6.2.1
struct usb_cdc_ncm_ntb_parameters {
__le16 bmNtbFormatsSupported;
__le16 wNdpInPayloadRemainder;
__le16 wNdpOutPayloadRemainder;
__le16 wNtbOutMaxDatagrams;
} __attribute__ ((packed));
* CDC NCM transfer headers, CDC NCM subclass 3.2
#define USB_CDC_NCM_NTH16_SIGN 0x484D434E /* NCMH */
#define USB_CDC_NCM_NTH32_SIGN 0x686D636E /* ncmh */
struct usb_cdc_ncm_nth16 {
} __attribute__ ((packed));
struct usb_cdc_ncm_nth32 {
} __attribute__ ((packed));
* CDC NCM datagram pointers, CDC NCM subclass 3.3
#define USB_CDC_NCM_NDP16_CRC_SIGN 0x314D434E /* NCM1 */
#define USB_CDC_NCM_NDP16_NOCRC_SIGN 0x304D434E /* NCM0 */
#define USB_CDC_NCM_NDP32_CRC_SIGN 0x316D636E /* ncm1 */
#define USB_CDC_NCM_NDP32_NOCRC_SIGN 0x306D636E /* ncm0 */
#define USB_CDC_MBIM_NDP16_IPS_SIGN 0x00535049 /* IPS<sessionID> : IPS0 for now */
#define USB_CDC_MBIM_NDP32_IPS_SIGN 0x00737069 /* ips<sessionID> : ips0 for now */
#define USB_CDC_MBIM_NDP16_DSS_SIGN 0x00535344 /* DSS<sessionID> */
#define USB_CDC_MBIM_NDP32_DSS_SIGN 0x00737364 /* dss<sessionID> */
/* 16-bit NCM Datagram Pointer Entry */
struct usb_cdc_ncm_dpe16 {
} __attribute__((__packed__));
/* 16-bit NCM Datagram Pointer Table */
struct usb_cdc_ncm_ndp16 {
struct usb_cdc_ncm_dpe16 dpe16[0];
} __attribute__ ((packed));
/* 32-bit NCM Datagram Pointer Entry */
struct usb_cdc_ncm_dpe32 {
} __attribute__((__packed__));
/* 32-bit NCM Datagram Pointer Table */
struct usb_cdc_ncm_ndp32 {
struct usb_cdc_ncm_dpe32 dpe32[0];
} __attribute__ ((packed));
/* CDC NCM subclass 3.2.1 and 3.2.2 */
#define USB_CDC_NCM_NDP16_INDEX_MIN 0x000C
#define USB_CDC_NCM_NDP32_INDEX_MIN 0x0010
/* CDC NCM subclass 3.3.3 Datagram Formatting */
#define USB_CDC_NCM_DATAGRAM_FORMAT_CRC 0x30
#define USB_CDC_NCM_DATAGRAM_FORMAT_NOCRC 0X31
/* CDC NCM subclass 4.2 NCM Communications Interface Protocol Code */
#define USB_CDC_NCM_PROTO_CODE_NO_ENCAP_COMMANDS 0x00
#define USB_CDC_NCM_PROTO_CODE_EXTERN_PROTO 0xFE
/* CDC NCM subclass 5.2.1 NCM Functional Descriptor, bmNetworkCapabilities */
#define USB_CDC_NCM_NCAP_ETH_FILTER (1 << 0)
#define USB_CDC_NCM_NCAP_NET_ADDRESS (1 << 1)
#define USB_CDC_NCM_NCAP_ENCAP_COMMAND (1 << 2)
#define USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE (1 << 3)
#define USB_CDC_NCM_NCAP_CRC_MODE (1 << 4)
#define USB_CDC_NCM_NCAP_NTB_INPUT_SIZE (1 << 5)
/* CDC NCM subclass Table 6-3: NTB Parameter Structure */
#define USB_CDC_NCM_NTB16_SUPPORTED (1 << 0)
#define USB_CDC_NCM_NTB32_SUPPORTED (1 << 1)
/* CDC NCM subclass Table 6-3: NTB Parameter Structure */
#define USB_CDC_NCM_NDP_ALIGN_MIN_SIZE 0x04
#define USB_CDC_NCM_NTB_MAX_LENGTH 0x1C
/* CDC NCM subclass 6.2.5 SetNtbFormat */
#define USB_CDC_NCM_NTB16_FORMAT 0x00
#define USB_CDC_NCM_NTB32_FORMAT 0x01
/* CDC NCM subclass 6.2.7 SetNtbInputSize */
#define USB_CDC_NCM_NTB_MIN_IN_SIZE 2048
#define USB_CDC_NCM_NTB_MIN_OUT_SIZE 2048
/* NTB Input Size Structure */
struct usb_cdc_ncm_ndp_input_size {
__le16 wNtbInMaxDatagrams;
} __attribute__ ((packed));
/* CDC NCM subclass 6.2.11 SetCrcMode */
#define USB_CDC_NCM_CRC_NOT_APPENDED 0x00
#define USB_CDC_NCM_CRC_APPENDED 0x01
#endif /* __UAPI_LINUX_USB_CDC_H */
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