1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * USB Communications Device Class (CDC) definitions
4 *
5 * CDC says how to talk to lots of different types of network adapters,
6 * notably ethernet adapters and various modems. It's used mostly with
7 * firmware based USB peripherals.
8 */
9
10#ifndef __UAPI_LINUX_USB_CDC_H
11#define __UAPI_LINUX_USB_CDC_H
12
13#include <linux/types.h>
14
15#define USB_CDC_SUBCLASS_ACM 0x02
16#define USB_CDC_SUBCLASS_ETHERNET 0x06
17#define USB_CDC_SUBCLASS_WHCM 0x08
18#define USB_CDC_SUBCLASS_DMM 0x09
19#define USB_CDC_SUBCLASS_MDLM 0x0a
20#define USB_CDC_SUBCLASS_OBEX 0x0b
21#define USB_CDC_SUBCLASS_EEM 0x0c
22#define USB_CDC_SUBCLASS_NCM 0x0d
23#define USB_CDC_SUBCLASS_MBIM 0x0e
24
25#define USB_CDC_PROTO_NONE 0
26
27#define USB_CDC_ACM_PROTO_AT_V25TER 1
28#define USB_CDC_ACM_PROTO_AT_PCCA101 2
29#define USB_CDC_ACM_PROTO_AT_PCCA101_WAKE 3
30#define USB_CDC_ACM_PROTO_AT_GSM 4
31#define USB_CDC_ACM_PROTO_AT_3G 5
32#define USB_CDC_ACM_PROTO_AT_CDMA 6
33#define USB_CDC_ACM_PROTO_VENDOR 0xff
34
35#define USB_CDC_PROTO_EEM 7
36
37#define USB_CDC_NCM_PROTO_NTB 1
38#define USB_CDC_MBIM_PROTO_NTB 2
39
40/*-------------------------------------------------------------------------*/
41
42/*
43 * Class-Specific descriptors ... there are a couple dozen of them
44 */
45
46#define USB_CDC_HEADER_TYPE 0x00 /* header_desc */
47#define USB_CDC_CALL_MANAGEMENT_TYPE 0x01 /* call_mgmt_descriptor */
48#define USB_CDC_ACM_TYPE 0x02 /* acm_descriptor */
49#define USB_CDC_UNION_TYPE 0x06 /* union_desc */
50#define USB_CDC_COUNTRY_TYPE 0x07
51#define USB_CDC_NETWORK_TERMINAL_TYPE 0x0a /* network_terminal_desc */
52#define USB_CDC_ETHERNET_TYPE 0x0f /* ether_desc */
53#define USB_CDC_WHCM_TYPE 0x11
54#define USB_CDC_MDLM_TYPE 0x12 /* mdlm_desc */
55#define USB_CDC_MDLM_DETAIL_TYPE 0x13 /* mdlm_detail_desc */
56#define USB_CDC_DMM_TYPE 0x14
57#define USB_CDC_OBEX_TYPE 0x15
58#define USB_CDC_NCM_TYPE 0x1a
59#define USB_CDC_MBIM_TYPE 0x1b
60#define USB_CDC_MBIM_EXTENDED_TYPE 0x1c
61
62/* "Header Functional Descriptor" from CDC spec 5.2.3.1 */
63struct usb_cdc_header_desc {
64 __u8 bLength;
65 __u8 bDescriptorType;
66 __u8 bDescriptorSubType;
67
68 __le16 bcdCDC;
69} __attribute__ ((packed));
70
71/* "Call Management Descriptor" from CDC spec 5.2.3.2 */
72struct usb_cdc_call_mgmt_descriptor {
73 __u8 bLength;
74 __u8 bDescriptorType;
75 __u8 bDescriptorSubType;
76
77 __u8 bmCapabilities;
78#define USB_CDC_CALL_MGMT_CAP_CALL_MGMT 0x01
79#define USB_CDC_CALL_MGMT_CAP_DATA_INTF 0x02
80
81 __u8 bDataInterface;
82} __attribute__ ((packed));
83
84/* "Abstract Control Management Descriptor" from CDC spec 5.2.3.3 */
85struct usb_cdc_acm_descriptor {
86 __u8 bLength;
87 __u8 bDescriptorType;
88 __u8 bDescriptorSubType;
89
90 __u8 bmCapabilities;
91} __attribute__ ((packed));
92
93/* capabilities from 5.2.3.3 */
94
95#define USB_CDC_COMM_FEATURE 0x01
96#define USB_CDC_CAP_LINE 0x02
97#define USB_CDC_CAP_BRK 0x04
98#define USB_CDC_CAP_NOTIFY 0x08
99
100/* "Union Functional Descriptor" from CDC spec 5.2.3.8 */
101struct usb_cdc_union_desc {
102 __u8 bLength;
103 __u8 bDescriptorType;
104 __u8 bDescriptorSubType;
105
106 __u8 bMasterInterface0;
107 __u8 bSlaveInterface0;
108 /* ... and there could be other slave interfaces */
109} __attribute__ ((packed));
110
111/* "Country Selection Functional Descriptor" from CDC spec 5.2.3.9 */
112struct usb_cdc_country_functional_desc {
113 __u8 bLength;
114 __u8 bDescriptorType;
115 __u8 bDescriptorSubType;
116
117 __u8 iCountryCodeRelDate;
118 __le16 wCountyCode0;
119 /* ... and there can be a lot of country codes */
120} __attribute__ ((packed));
121
122/* "Network Channel Terminal Functional Descriptor" from CDC spec 5.2.3.11 */
123struct usb_cdc_network_terminal_desc {
124 __u8 bLength;
125 __u8 bDescriptorType;
126 __u8 bDescriptorSubType;
127
128 __u8 bEntityId;
129 __u8 iName;
130 __u8 bChannelIndex;
131 __u8 bPhysicalInterface;
132} __attribute__ ((packed));
133
134/* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */
135struct usb_cdc_ether_desc {
136 __u8 bLength;
137 __u8 bDescriptorType;
138 __u8 bDescriptorSubType;
139
140 __u8 iMACAddress;
141 __le32 bmEthernetStatistics;
142 __le16 wMaxSegmentSize;
143 __le16 wNumberMCFilters;
144 __u8 bNumberPowerFilters;
145} __attribute__ ((packed));
146
147/* "Telephone Control Model Functional Descriptor" from CDC WMC spec 6.3..3 */
148struct usb_cdc_dmm_desc {
149 __u8 bFunctionLength;
150 __u8 bDescriptorType;
151 __u8 bDescriptorSubtype;
152 __u16 bcdVersion;
153 __le16 wMaxCommand;
154} __attribute__ ((packed));
155
156/* "MDLM Functional Descriptor" from CDC WMC spec 6.7.2.3 */
157struct usb_cdc_mdlm_desc {
158 __u8 bLength;
159 __u8 bDescriptorType;
160 __u8 bDescriptorSubType;
161
162 __le16 bcdVersion;
163 __u8 bGUID[16];
164} __attribute__ ((packed));
165
166/* "MDLM Detail Functional Descriptor" from CDC WMC spec 6.7.2.4 */
167struct usb_cdc_mdlm_detail_desc {
168 __u8 bLength;
169 __u8 bDescriptorType;
170 __u8 bDescriptorSubType;
171
172 /* type is associated with mdlm_desc.bGUID */
173 __u8 bGuidDescriptorType;
174 __u8 bDetailData[0];
175} __attribute__ ((packed));
176
177/* "OBEX Control Model Functional Descriptor" */
178struct usb_cdc_obex_desc {
179 __u8 bLength;
180 __u8 bDescriptorType;
181 __u8 bDescriptorSubType;
182
183 __le16 bcdVersion;
184} __attribute__ ((packed));
185
186/* "NCM Control Model Functional Descriptor" */
187struct usb_cdc_ncm_desc {
188 __u8 bLength;
189 __u8 bDescriptorType;
190 __u8 bDescriptorSubType;
191
192 __le16 bcdNcmVersion;
193 __u8 bmNetworkCapabilities;
194} __attribute__ ((packed));
195
196/* "MBIM Control Model Functional Descriptor" */
197struct usb_cdc_mbim_desc {
198 __u8 bLength;
199 __u8 bDescriptorType;
200 __u8 bDescriptorSubType;
201
202 __le16 bcdMBIMVersion;
203 __le16 wMaxControlMessage;
204 __u8 bNumberFilters;
205 __u8 bMaxFilterSize;
206 __le16 wMaxSegmentSize;
207 __u8 bmNetworkCapabilities;
208} __attribute__ ((packed));
209
210/* "MBIM Extended Functional Descriptor" from CDC MBIM spec 1.0 errata-1 */
211struct usb_cdc_mbim_extended_desc {
212 __u8 bLength;
213 __u8 bDescriptorType;
214 __u8 bDescriptorSubType;
215
216 __le16 bcdMBIMExtendedVersion;
217 __u8 bMaxOutstandingCommandMessages;
218 __le16 wMTU;
219} __attribute__ ((packed));
220
221/*-------------------------------------------------------------------------*/
222
223/*
224 * Class-Specific Control Requests (6.2)
225 *
226 * section 3.6.2.1 table 4 has the ACM profile, for modems.
227 * section 3.8.2 table 10 has the ethernet profile.
228 *
229 * Microsoft's RNDIS stack for Ethernet is a vendor-specific CDC ACM variant,
230 * heavily dependent on the encapsulated (proprietary) command mechanism.
231 */
232
233#define USB_CDC_SEND_ENCAPSULATED_COMMAND 0x00
234#define USB_CDC_GET_ENCAPSULATED_RESPONSE 0x01
235#define USB_CDC_REQ_SET_LINE_CODING 0x20
236#define USB_CDC_REQ_GET_LINE_CODING 0x21
237#define USB_CDC_REQ_SET_CONTROL_LINE_STATE 0x22
238#define USB_CDC_REQ_SEND_BREAK 0x23
239#define USB_CDC_SET_ETHERNET_MULTICAST_FILTERS 0x40
240#define USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER 0x41
241#define USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER 0x42
242#define USB_CDC_SET_ETHERNET_PACKET_FILTER 0x43
243#define USB_CDC_GET_ETHERNET_STATISTIC 0x44
244#define USB_CDC_GET_NTB_PARAMETERS 0x80
245#define USB_CDC_GET_NET_ADDRESS 0x81
246#define USB_CDC_SET_NET_ADDRESS 0x82
247#define USB_CDC_GET_NTB_FORMAT 0x83
248#define USB_CDC_SET_NTB_FORMAT 0x84
249#define USB_CDC_GET_NTB_INPUT_SIZE 0x85
250#define USB_CDC_SET_NTB_INPUT_SIZE 0x86
251#define USB_CDC_GET_MAX_DATAGRAM_SIZE 0x87
252#define USB_CDC_SET_MAX_DATAGRAM_SIZE 0x88
253#define USB_CDC_GET_CRC_MODE 0x89
254#define USB_CDC_SET_CRC_MODE 0x8a
255
256/* Line Coding Structure from CDC spec 6.2.13 */
257struct usb_cdc_line_coding {
258 __le32 dwDTERate;
259 __u8 bCharFormat;
260#define USB_CDC_1_STOP_BITS 0
261#define USB_CDC_1_5_STOP_BITS 1
262#define USB_CDC_2_STOP_BITS 2
263
264 __u8 bParityType;
265#define USB_CDC_NO_PARITY 0
266#define USB_CDC_ODD_PARITY 1
267#define USB_CDC_EVEN_PARITY 2
268#define USB_CDC_MARK_PARITY 3
269#define USB_CDC_SPACE_PARITY 4
270
271 __u8 bDataBits;
272} __attribute__ ((packed));
273
274/* table 62; bits in multicast filter */
275#define USB_CDC_PACKET_TYPE_PROMISCUOUS (1 << 0)
276#define USB_CDC_PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */
277#define USB_CDC_PACKET_TYPE_DIRECTED (1 << 2)
278#define USB_CDC_PACKET_TYPE_BROADCAST (1 << 3)
279#define USB_CDC_PACKET_TYPE_MULTICAST (1 << 4) /* filtered */
280
281
282/*-------------------------------------------------------------------------*/
283
284/*
285 * Class-Specific Notifications (6.3) sent by interrupt transfers
286 *
287 * section 3.8.2 table 11 of the CDC spec lists Ethernet notifications
288 * section 3.6.2.1 table 5 specifies ACM notifications, accepted by RNDIS
289 * RNDIS also defines its own bit-incompatible notifications
290 */
291
292#define USB_CDC_NOTIFY_NETWORK_CONNECTION 0x00
293#define USB_CDC_NOTIFY_RESPONSE_AVAILABLE 0x01
294#define USB_CDC_NOTIFY_SERIAL_STATE 0x20
295#define USB_CDC_NOTIFY_SPEED_CHANGE 0x2a
296
297struct usb_cdc_notification {
298 __u8 bmRequestType;
299 __u8 bNotificationType;
300 __le16 wValue;
301 __le16 wIndex;
302 __le16 wLength;
303} __attribute__ ((packed));
304
305struct usb_cdc_speed_change {
306 __le32 DLBitRRate; /* contains the downlink bit rate (IN pipe) */
307 __le32 ULBitRate; /* contains the uplink bit rate (OUT pipe) */
308} __attribute__ ((packed));
309
310/*-------------------------------------------------------------------------*/
311
312/*
313 * Class Specific structures and constants
314 *
315 * CDC NCM NTB parameters structure, CDC NCM subclass 6.2.1
316 *
317 */
318
319struct usb_cdc_ncm_ntb_parameters {
320 __le16 wLength;
321 __le16 bmNtbFormatsSupported;
322 __le32 dwNtbInMaxSize;
323 __le16 wNdpInDivisor;
324 __le16 wNdpInPayloadRemainder;
325 __le16 wNdpInAlignment;
326 __le16 wPadding1;
327 __le32 dwNtbOutMaxSize;
328 __le16 wNdpOutDivisor;
329 __le16 wNdpOutPayloadRemainder;
330 __le16 wNdpOutAlignment;
331 __le16 wNtbOutMaxDatagrams;
332} __attribute__ ((packed));
333
334/*
335 * CDC NCM transfer headers, CDC NCM subclass 3.2
336 */
337
338#define USB_CDC_NCM_NTH16_SIGN 0x484D434E /* NCMH */
339#define USB_CDC_NCM_NTH32_SIGN 0x686D636E /* ncmh */
340
341struct usb_cdc_ncm_nth16 {
342 __le32 dwSignature;
343 __le16 wHeaderLength;
344 __le16 wSequence;
345 __le16 wBlockLength;
346 __le16 wNdpIndex;
347} __attribute__ ((packed));
348
349struct usb_cdc_ncm_nth32 {
350 __le32 dwSignature;
351 __le16 wHeaderLength;
352 __le16 wSequence;
353 __le32 dwBlockLength;
354 __le32 dwNdpIndex;
355} __attribute__ ((packed));
356
357/*
358 * CDC NCM datagram pointers, CDC NCM subclass 3.3
359 */
360
361#define USB_CDC_NCM_NDP16_CRC_SIGN 0x314D434E /* NCM1 */
362#define USB_CDC_NCM_NDP16_NOCRC_SIGN 0x304D434E /* NCM0 */
363#define USB_CDC_NCM_NDP32_CRC_SIGN 0x316D636E /* ncm1 */
364#define USB_CDC_NCM_NDP32_NOCRC_SIGN 0x306D636E /* ncm0 */
365
366#define USB_CDC_MBIM_NDP16_IPS_SIGN 0x00535049 /* IPS<sessionID> : IPS0 for now */
367#define USB_CDC_MBIM_NDP32_IPS_SIGN 0x00737069 /* ips<sessionID> : ips0 for now */
368#define USB_CDC_MBIM_NDP16_DSS_SIGN 0x00535344 /* DSS<sessionID> */
369#define USB_CDC_MBIM_NDP32_DSS_SIGN 0x00737364 /* dss<sessionID> */
370
371/* 16-bit NCM Datagram Pointer Entry */
372struct usb_cdc_ncm_dpe16 {
373 __le16 wDatagramIndex;
374 __le16 wDatagramLength;
375} __attribute__((__packed__));
376
377/* 16-bit NCM Datagram Pointer Table */
378struct usb_cdc_ncm_ndp16 {
379 __le32 dwSignature;
380 __le16 wLength;
381 __le16 wNextNdpIndex;
382 struct usb_cdc_ncm_dpe16 dpe16[0];
383} __attribute__ ((packed));
384
385/* 32-bit NCM Datagram Pointer Entry */
386struct usb_cdc_ncm_dpe32 {
387 __le32 dwDatagramIndex;
388 __le32 dwDatagramLength;
389} __attribute__((__packed__));
390
391/* 32-bit NCM Datagram Pointer Table */
392struct usb_cdc_ncm_ndp32 {
393 __le32 dwSignature;
394 __le16 wLength;
395 __le16 wReserved6;
396 __le32 dwNextNdpIndex;
397 __le32 dwReserved12;
398 struct usb_cdc_ncm_dpe32 dpe32[0];
399} __attribute__ ((packed));
400
401/* CDC NCM subclass 3.2.1 and 3.2.2 */
402#define USB_CDC_NCM_NDP16_INDEX_MIN 0x000C
403#define USB_CDC_NCM_NDP32_INDEX_MIN 0x0010
404
405/* CDC NCM subclass 3.3.3 Datagram Formatting */
406#define USB_CDC_NCM_DATAGRAM_FORMAT_CRC 0x30
407#define USB_CDC_NCM_DATAGRAM_FORMAT_NOCRC 0X31
408
409/* CDC NCM subclass 4.2 NCM Communications Interface Protocol Code */
410#define USB_CDC_NCM_PROTO_CODE_NO_ENCAP_COMMANDS 0x00
411#define USB_CDC_NCM_PROTO_CODE_EXTERN_PROTO 0xFE
412
413/* CDC NCM subclass 5.2.1 NCM Functional Descriptor, bmNetworkCapabilities */
414#define USB_CDC_NCM_NCAP_ETH_FILTER (1 << 0)
415#define USB_CDC_NCM_NCAP_NET_ADDRESS (1 << 1)
416#define USB_CDC_NCM_NCAP_ENCAP_COMMAND (1 << 2)
417#define USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE (1 << 3)
418#define USB_CDC_NCM_NCAP_CRC_MODE (1 << 4)
419#define USB_CDC_NCM_NCAP_NTB_INPUT_SIZE (1 << 5)
420
421/* CDC NCM subclass Table 6-3: NTB Parameter Structure */
422#define USB_CDC_NCM_NTB16_SUPPORTED (1 << 0)
423#define USB_CDC_NCM_NTB32_SUPPORTED (1 << 1)
424
425/* CDC NCM subclass Table 6-3: NTB Parameter Structure */
426#define USB_CDC_NCM_NDP_ALIGN_MIN_SIZE 0x04
427#define USB_CDC_NCM_NTB_MAX_LENGTH 0x1C
428
429/* CDC NCM subclass 6.2.5 SetNtbFormat */
430#define USB_CDC_NCM_NTB16_FORMAT 0x00
431#define USB_CDC_NCM_NTB32_FORMAT 0x01
432
433/* CDC NCM subclass 6.2.7 SetNtbInputSize */
434#define USB_CDC_NCM_NTB_MIN_IN_SIZE 2048
435#define USB_CDC_NCM_NTB_MIN_OUT_SIZE 2048
436
437/* NTB Input Size Structure */
438struct usb_cdc_ncm_ndp_input_size {
439 __le32 dwNtbInMaxSize;
440 __le16 wNtbInMaxDatagrams;
441 __le16 wReserved;
442} __attribute__ ((packed));
443
444/* CDC NCM subclass 6.2.11 SetCrcMode */
445#define USB_CDC_NCM_CRC_NOT_APPENDED 0x00
446#define USB_CDC_NCM_CRC_APPENDED 0x01
447
448#endif /* __UAPI_LINUX_USB_CDC_H */
449