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9f722c0978
This introduces a CDC Ethernet Emulation Model (EEM) host side driver to support USB EEM devices. EEM is different from the Ethernet Control Model (ECM) currently supported by the "CDC Ethernet" driver. One key difference is that it doesn't require of USB interface alternate settings to manage interface state; some maldesigned hardware can't handle that part of USB. It also avoids a separate USB interface for control and status updates. [ dbrownell@users.sourceforge.net: fix skb leaks, add rx packet checks, improve fault handling, EEM conformance updates, cleanup ] Signed-off-by: Omar Laazimani <omar.oberthur@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: David S. Miller <davem@davemloft.net>
251 lines
6.9 KiB
C
251 lines
6.9 KiB
C
/*
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* USB Communications Device Class (CDC) definitions
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*
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* CDC says how to talk to lots of different types of network adapters,
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* notably ethernet adapters and various modems. It's used mostly with
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* firmware based USB peripherals.
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*/
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#ifndef __LINUX_USB_CDC_H
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#define __LINUX_USB_CDC_H
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#include <linux/types.h>
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#define USB_CDC_SUBCLASS_ACM 0x02
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#define USB_CDC_SUBCLASS_ETHERNET 0x06
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#define USB_CDC_SUBCLASS_WHCM 0x08
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#define USB_CDC_SUBCLASS_DMM 0x09
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#define USB_CDC_SUBCLASS_MDLM 0x0a
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#define USB_CDC_SUBCLASS_OBEX 0x0b
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#define USB_CDC_SUBCLASS_EEM 0x0c
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#define USB_CDC_PROTO_NONE 0
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#define USB_CDC_ACM_PROTO_AT_V25TER 1
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#define USB_CDC_ACM_PROTO_AT_PCCA101 2
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#define USB_CDC_ACM_PROTO_AT_PCCA101_WAKE 3
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#define USB_CDC_ACM_PROTO_AT_GSM 4
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#define USB_CDC_ACM_PROTO_AT_3G 5
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#define USB_CDC_ACM_PROTO_AT_CDMA 6
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#define USB_CDC_ACM_PROTO_VENDOR 0xff
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#define USB_CDC_PROTO_EEM 7
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/*-------------------------------------------------------------------------*/
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/*
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* Class-Specific descriptors ... there are a couple dozen of them
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*/
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#define USB_CDC_HEADER_TYPE 0x00 /* header_desc */
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#define USB_CDC_CALL_MANAGEMENT_TYPE 0x01 /* call_mgmt_descriptor */
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#define USB_CDC_ACM_TYPE 0x02 /* acm_descriptor */
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#define USB_CDC_UNION_TYPE 0x06 /* union_desc */
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#define USB_CDC_COUNTRY_TYPE 0x07
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#define USB_CDC_NETWORK_TERMINAL_TYPE 0x0a /* network_terminal_desc */
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#define USB_CDC_ETHERNET_TYPE 0x0f /* ether_desc */
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#define USB_CDC_WHCM_TYPE 0x11
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#define USB_CDC_MDLM_TYPE 0x12 /* mdlm_desc */
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#define USB_CDC_MDLM_DETAIL_TYPE 0x13 /* mdlm_detail_desc */
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#define USB_CDC_DMM_TYPE 0x14
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#define USB_CDC_OBEX_TYPE 0x15
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/* "Header Functional Descriptor" from CDC spec 5.2.3.1 */
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struct usb_cdc_header_desc {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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__le16 bcdCDC;
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} __attribute__ ((packed));
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/* "Call Management Descriptor" from CDC spec 5.2.3.2 */
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struct usb_cdc_call_mgmt_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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__u8 bmCapabilities;
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#define USB_CDC_CALL_MGMT_CAP_CALL_MGMT 0x01
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#define USB_CDC_CALL_MGMT_CAP_DATA_INTF 0x02
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__u8 bDataInterface;
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} __attribute__ ((packed));
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/* "Abstract Control Management Descriptor" from CDC spec 5.2.3.3 */
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struct usb_cdc_acm_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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__u8 bmCapabilities;
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} __attribute__ ((packed));
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/* capabilities from 5.2.3.3 */
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#define USB_CDC_COMM_FEATURE 0x01
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#define USB_CDC_CAP_LINE 0x02
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#define USB_CDC_CAP_BRK 0x04
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#define USB_CDC_CAP_NOTIFY 0x08
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/* "Union Functional Descriptor" from CDC spec 5.2.3.8 */
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struct usb_cdc_union_desc {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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__u8 bMasterInterface0;
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__u8 bSlaveInterface0;
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/* ... and there could be other slave interfaces */
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} __attribute__ ((packed));
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/* "Country Selection Functional Descriptor" from CDC spec 5.2.3.9 */
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struct usb_cdc_country_functional_desc {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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__u8 iCountryCodeRelDate;
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__le16 wCountyCode0;
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/* ... and there can be a lot of country codes */
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} __attribute__ ((packed));
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/* "Network Channel Terminal Functional Descriptor" from CDC spec 5.2.3.11 */
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struct usb_cdc_network_terminal_desc {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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__u8 bEntityId;
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__u8 iName;
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__u8 bChannelIndex;
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__u8 bPhysicalInterface;
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} __attribute__ ((packed));
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/* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */
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struct usb_cdc_ether_desc {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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__u8 iMACAddress;
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__le32 bmEthernetStatistics;
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__le16 wMaxSegmentSize;
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__le16 wNumberMCFilters;
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__u8 bNumberPowerFilters;
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} __attribute__ ((packed));
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/* "Telephone Control Model Functional Descriptor" from CDC WMC spec 6.3..3 */
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struct usb_cdc_dmm_desc {
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__u8 bFunctionLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubtype;
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__u16 bcdVersion;
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__le16 wMaxCommand;
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} __attribute__ ((packed));
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/* "MDLM Functional Descriptor" from CDC WMC spec 6.7.2.3 */
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struct usb_cdc_mdlm_desc {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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__le16 bcdVersion;
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__u8 bGUID[16];
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} __attribute__ ((packed));
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/* "MDLM Detail Functional Descriptor" from CDC WMC spec 6.7.2.4 */
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struct usb_cdc_mdlm_detail_desc {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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/* type is associated with mdlm_desc.bGUID */
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__u8 bGuidDescriptorType;
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__u8 bDetailData[0];
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} __attribute__ ((packed));
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/* "OBEX Control Model Functional Descriptor" */
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struct usb_cdc_obex_desc {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubType;
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__le16 bcdVersion;
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} __attribute__ ((packed));
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/*-------------------------------------------------------------------------*/
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/*
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* Class-Specific Control Requests (6.2)
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*
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* section 3.6.2.1 table 4 has the ACM profile, for modems.
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* section 3.8.2 table 10 has the ethernet profile.
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*
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* Microsoft's RNDIS stack for Ethernet is a vendor-specific CDC ACM variant,
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* heavily dependent on the encapsulated (proprietary) command mechanism.
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*/
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#define USB_CDC_SEND_ENCAPSULATED_COMMAND 0x00
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#define USB_CDC_GET_ENCAPSULATED_RESPONSE 0x01
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#define USB_CDC_REQ_SET_LINE_CODING 0x20
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#define USB_CDC_REQ_GET_LINE_CODING 0x21
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#define USB_CDC_REQ_SET_CONTROL_LINE_STATE 0x22
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#define USB_CDC_REQ_SEND_BREAK 0x23
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#define USB_CDC_SET_ETHERNET_MULTICAST_FILTERS 0x40
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#define USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER 0x41
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#define USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER 0x42
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#define USB_CDC_SET_ETHERNET_PACKET_FILTER 0x43
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#define USB_CDC_GET_ETHERNET_STATISTIC 0x44
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/* Line Coding Structure from CDC spec 6.2.13 */
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struct usb_cdc_line_coding {
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__le32 dwDTERate;
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__u8 bCharFormat;
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#define USB_CDC_1_STOP_BITS 0
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#define USB_CDC_1_5_STOP_BITS 1
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#define USB_CDC_2_STOP_BITS 2
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__u8 bParityType;
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#define USB_CDC_NO_PARITY 0
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#define USB_CDC_ODD_PARITY 1
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#define USB_CDC_EVEN_PARITY 2
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#define USB_CDC_MARK_PARITY 3
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#define USB_CDC_SPACE_PARITY 4
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__u8 bDataBits;
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} __attribute__ ((packed));
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/* table 62; bits in multicast filter */
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#define USB_CDC_PACKET_TYPE_PROMISCUOUS (1 << 0)
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#define USB_CDC_PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */
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#define USB_CDC_PACKET_TYPE_DIRECTED (1 << 2)
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#define USB_CDC_PACKET_TYPE_BROADCAST (1 << 3)
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#define USB_CDC_PACKET_TYPE_MULTICAST (1 << 4) /* filtered */
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/*-------------------------------------------------------------------------*/
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/*
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* Class-Specific Notifications (6.3) sent by interrupt transfers
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*
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* section 3.8.2 table 11 of the CDC spec lists Ethernet notifications
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* section 3.6.2.1 table 5 specifies ACM notifications, accepted by RNDIS
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* RNDIS also defines its own bit-incompatible notifications
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*/
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#define USB_CDC_NOTIFY_NETWORK_CONNECTION 0x00
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#define USB_CDC_NOTIFY_RESPONSE_AVAILABLE 0x01
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#define USB_CDC_NOTIFY_SERIAL_STATE 0x20
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#define USB_CDC_NOTIFY_SPEED_CHANGE 0x2a
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struct usb_cdc_notification {
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__u8 bmRequestType;
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__u8 bNotificationType;
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__le16 wValue;
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__le16 wIndex;
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__le16 wLength;
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} __attribute__ ((packed));
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#endif /* __LINUX_USB_CDC_H */
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