aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/usb_cdc.h
blob: 1b68c122279a82826aea36f02c80edb2fed384b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
/*
 * 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_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));

/* "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));

/* "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[];
} __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));