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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.
*/
#ifndef __LINUX_USB_CDC_H
#define __LINUX_USB_CDC_H
#include <linux/types.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_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
/*-------------------------------------------------------------------------*/
/*
* 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));
/* "Telephone Control Model Functional Descriptor" from CDC WMC spec 6.3..3 */
struct usb_cdc_dmm_desc {
__u8 bFunctionLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u16 bcdVersion;
__le16 wMaxCommand;
} __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));
/* "OBEX Control Model Functional Descriptor" */
struct usb_cdc_obex_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubType;
__le16 bcdVersion;
} __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));
#endif /* __LINUX_USB_CDC_H */
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