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1/*
2 * This file holds USB constants and structures that are needed for
3 * USB device APIs. These are used by the USB device model, which is
4 * defined in chapter 9 of the USB 2.0 specification and in the
5 * Wireless USB 1.0 (spread around). Linux has several APIs in C that
6 * need these:
7 *
8 * - the master/host side Linux-USB kernel driver API;
9 * - the "usbfs" user space API; and
10 * - the Linux "gadget" slave/device/peripheral side driver API.
11 *
12 * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
13 * act either as a USB master/host or as a USB slave/device. That means
14 * the master and slave side APIs benefit from working well together.
15 *
16 * There's also "Wireless USB", using low power short range radios for
17 * peripheral interconnection but otherwise building on the USB framework.
18 *
19 * Note all descriptors are declared '__attribute__((packed))' so that:
20 *
21 * [a] they never get padded, either internally (USB spec writers
22 * probably handled that) or externally;
23 *
24 * [b] so that accessing bigger-than-a-bytes fields will never
25 * generate bus errors on any platform, even when the location of
26 * its descriptor inside a bundle isn't "naturally aligned", and
27 *
28 * [c] for consistency, removing all doubt even when it appears to
29 * someone that the two other points are non-issues for that
30 * particular descriptor type.
31 */
32
33#ifndef __LINUX_USB_CH9_H
34#define __LINUX_USB_CH9_H
35
36#include <linux/types.h> /* __u8 etc */
37
38/*-------------------------------------------------------------------------*/
39
40/* CONTROL REQUEST SUPPORT */
41
42/*
43 * USB directions
44 *
45 * This bit flag is used in endpoint descriptors' bEndpointAddress field.
46 * It's also one of three fields in control requests bRequestType.
47 */
48#define USB_DIR_OUT 0 /* to device */
49#define USB_DIR_IN 0x80 /* to host */
50
51/*
52 * USB types, the second of three bRequestType fields
53 */
54#define USB_TYPE_MASK (0x03 << 5)
55#define USB_TYPE_STANDARD (0x00 << 5)
56#define USB_TYPE_CLASS (0x01 << 5)
57#define USB_TYPE_VENDOR (0x02 << 5)
58#define USB_TYPE_RESERVED (0x03 << 5)
59
60/*
61 * USB recipients, the third of three bRequestType fields
62 */
63#define USB_RECIP_MASK 0x1f
64#define USB_RECIP_DEVICE 0x00
65#define USB_RECIP_INTERFACE 0x01
66#define USB_RECIP_ENDPOINT 0x02
67#define USB_RECIP_OTHER 0x03
68/* From Wireless USB 1.0 */
69#define USB_RECIP_PORT 0x04
70#define USB_RECIP_RPIPE 0x05
71
72/*
73 * Standard requests, for the bRequest field of a SETUP packet.
74 *
75 * These are qualified by the bRequestType field, so that for example
76 * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
77 * by a GET_STATUS request.
78 */
79#define USB_REQ_GET_STATUS 0x00
80#define USB_REQ_CLEAR_FEATURE 0x01
81#define USB_REQ_SET_FEATURE 0x03
82#define USB_REQ_SET_ADDRESS 0x05
83#define USB_REQ_GET_DESCRIPTOR 0x06
84#define USB_REQ_SET_DESCRIPTOR 0x07
85#define USB_REQ_GET_CONFIGURATION 0x08
86#define USB_REQ_SET_CONFIGURATION 0x09
87#define USB_REQ_GET_INTERFACE 0x0A
88#define USB_REQ_SET_INTERFACE 0x0B
89#define USB_REQ_SYNCH_FRAME 0x0C
90
91#define USB_REQ_SET_ENCRYPTION 0x0D /* Wireless USB */
92#define USB_REQ_GET_ENCRYPTION 0x0E
93#define USB_REQ_RPIPE_ABORT 0x0E
94#define USB_REQ_SET_HANDSHAKE 0x0F
95#define USB_REQ_RPIPE_RESET 0x0F
96#define USB_REQ_GET_HANDSHAKE 0x10
97#define USB_REQ_SET_CONNECTION 0x11
98#define USB_REQ_SET_SECURITY_DATA 0x12
99#define USB_REQ_GET_SECURITY_DATA 0x13
100#define USB_REQ_SET_WUSB_DATA 0x14
101#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
102#define USB_REQ_LOOPBACK_DATA_READ 0x16
103#define USB_REQ_SET_INTERFACE_DS 0x17
104
105/* The Link Power Mangement (LPM) ECN defines USB_REQ_TEST_AND_SET command,
106 * used by hubs to put ports into a new L1 suspend state, except that it
107 * forgot to define its number ...
108 */
109
110/*
111 * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
112 * are read as a bit array returned by USB_REQ_GET_STATUS. (So there
113 * are at most sixteen features of each type.) Hubs may also support a
114 * new USB_REQ_TEST_AND_SET_FEATURE to put ports into L1 suspend.
115 */
116#define USB_DEVICE_SELF_POWERED 0 /* (read only) */
117#define USB_DEVICE_REMOTE_WAKEUP 1 /* dev may initiate wakeup */
118#define USB_DEVICE_TEST_MODE 2 /* (wired high speed only) */
119#define USB_DEVICE_BATTERY 2 /* (wireless) */
120#define USB_DEVICE_B_HNP_ENABLE 3 /* (otg) dev may initiate HNP */
121#define USB_DEVICE_WUSB_DEVICE 3 /* (wireless)*/
122#define USB_DEVICE_A_HNP_SUPPORT 4 /* (otg) RH port supports HNP */
123#define USB_DEVICE_A_ALT_HNP_SUPPORT 5 /* (otg) other RH port does */
124#define USB_DEVICE_DEBUG_MODE 6 /* (special devices only) */
125
126#define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */
127
128
129/**
130 * struct usb_ctrlrequest - SETUP data for a USB device control request
131 * @bRequestType: matches the USB bmRequestType field
132 * @bRequest: matches the USB bRequest field
133 * @wValue: matches the USB wValue field (le16 byte order)
134 * @wIndex: matches the USB wIndex field (le16 byte order)
135 * @wLength: matches the USB wLength field (le16 byte order)
136 *
137 * This structure is used to send control requests to a USB device. It matches
138 * the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the
139 * USB spec for a fuller description of the different fields, and what they are
140 * used for.
141 *
142 * Note that the driver for any interface can issue control requests.
143 * For most devices, interfaces don't coordinate with each other, so
144 * such requests may be made at any time.
145 */
146struct usb_ctrlrequest {
147 __u8 bRequestType;
148 __u8 bRequest;
149 __le16 wValue;
150 __le16 wIndex;
151 __le16 wLength;
152} __attribute__ ((packed));
153
154/*-------------------------------------------------------------------------*/
155
156/*
157 * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
158 * (rarely) accepted by SET_DESCRIPTOR.
159 *
160 * Note that all multi-byte values here are encoded in little endian
161 * byte order "on the wire". Within the kernel and when exposed
162 * through the Linux-USB APIs, they are not converted to cpu byte
163 * order; it is the responsibility of the client code to do this.
164 * The single exception is when device and configuration descriptors (but
165 * not other descriptors) are read from usbfs (i.e. /proc/bus/usb/BBB/DDD);
166 * in this case the fields are converted to host endianness by the kernel.
167 */
168
169/*
170 * Descriptor types ... USB 2.0 spec table 9.5
171 */
172#define USB_DT_DEVICE 0x01
173#define USB_DT_CONFIG 0x02
174#define USB_DT_STRING 0x03
175#define USB_DT_INTERFACE 0x04
176#define USB_DT_ENDPOINT 0x05
177#define USB_DT_DEVICE_QUALIFIER 0x06
178#define USB_DT_OTHER_SPEED_CONFIG 0x07
179#define USB_DT_INTERFACE_POWER 0x08
180/* these are from a minor usb 2.0 revision (ECN) */
181#define USB_DT_OTG 0x09
182#define USB_DT_DEBUG 0x0a
183#define USB_DT_INTERFACE_ASSOCIATION 0x0b
184/* these are from the Wireless USB spec */
185#define USB_DT_SECURITY 0x0c
186#define USB_DT_KEY 0x0d
187#define USB_DT_ENCRYPTION_TYPE 0x0e
188#define USB_DT_BOS 0x0f
189#define USB_DT_DEVICE_CAPABILITY 0x10
190#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
191#define USB_DT_WIRE_ADAPTER 0x21
192#define USB_DT_RPIPE 0x22
193#define USB_DT_CS_RADIO_CONTROL 0x23
194
195/* Conventional codes for class-specific descriptors. The convention is
196 * defined in the USB "Common Class" Spec (3.11). Individual class specs
197 * are authoritative for their usage, not the "common class" writeup.
198 */
199#define USB_DT_CS_DEVICE (USB_TYPE_CLASS | USB_DT_DEVICE)
200#define USB_DT_CS_CONFIG (USB_TYPE_CLASS | USB_DT_CONFIG)
201#define USB_DT_CS_STRING (USB_TYPE_CLASS | USB_DT_STRING)
202#define USB_DT_CS_INTERFACE (USB_TYPE_CLASS | USB_DT_INTERFACE)
203#define USB_DT_CS_ENDPOINT (USB_TYPE_CLASS | USB_DT_ENDPOINT)
204
205/* All standard descriptors have these 2 fields at the beginning */
206struct usb_descriptor_header {
207 __u8 bLength;
208 __u8 bDescriptorType;
209} __attribute__ ((packed));
210
211
212/*-------------------------------------------------------------------------*/
213
214/* USB_DT_DEVICE: Device descriptor */
215struct usb_device_descriptor {
216 __u8 bLength;
217 __u8 bDescriptorType;
218
219 __le16 bcdUSB;
220 __u8 bDeviceClass;
221 __u8 bDeviceSubClass;
222 __u8 bDeviceProtocol;
223 __u8 bMaxPacketSize0;
224 __le16 idVendor;
225 __le16 idProduct;
226 __le16 bcdDevice;
227 __u8 iManufacturer;
228 __u8 iProduct;
229 __u8 iSerialNumber;
230 __u8 bNumConfigurations;
231} __attribute__ ((packed));
232
233#define USB_DT_DEVICE_SIZE 18
234
235
236/*
237 * Device and/or Interface Class codes
238 * as found in bDeviceClass or bInterfaceClass
239 * and defined by www.usb.org documents
240 */
241#define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
242#define USB_CLASS_AUDIO 1
243#define USB_CLASS_COMM 2
244#define USB_CLASS_HID 3
245#define USB_CLASS_PHYSICAL 5
246#define USB_CLASS_STILL_IMAGE 6
247#define USB_CLASS_PRINTER 7
248#define USB_CLASS_MASS_STORAGE 8
249#define USB_CLASS_HUB 9
250#define USB_CLASS_CDC_DATA 0x0a
251#define USB_CLASS_CSCID 0x0b /* chip+ smart card */
252#define USB_CLASS_CONTENT_SEC 0x0d /* content security */
253#define USB_CLASS_VIDEO 0x0e
254#define USB_CLASS_WIRELESS_CONTROLLER 0xe0
255#define USB_CLASS_MISC 0xef
256#define USB_CLASS_APP_SPEC 0xfe
257#define USB_CLASS_VENDOR_SPEC 0xff
258
259/*-------------------------------------------------------------------------*/
260
261/* USB_DT_CONFIG: Configuration descriptor information.
262 *
263 * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
264 * descriptor type is different. Highspeed-capable devices can look
265 * different depending on what speed they're currently running. Only
266 * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
267 * descriptors.
268 */
269struct usb_config_descriptor {
270 __u8 bLength;
271 __u8 bDescriptorType;
272
273 __le16 wTotalLength;
274 __u8 bNumInterfaces;
275 __u8 bConfigurationValue;
276 __u8 iConfiguration;
277 __u8 bmAttributes;
278 __u8 bMaxPower;
279} __attribute__ ((packed));
280
281#define USB_DT_CONFIG_SIZE 9
282
283/* from config descriptor bmAttributes */
284#define USB_CONFIG_ATT_ONE (1 << 7) /* must be set */
285#define USB_CONFIG_ATT_SELFPOWER (1 << 6) /* self powered */
286#define USB_CONFIG_ATT_WAKEUP (1 << 5) /* can wakeup */
287#define USB_CONFIG_ATT_BATTERY (1 << 4) /* battery powered */
288
289/*-------------------------------------------------------------------------*/
290
291/* USB_DT_STRING: String descriptor */
292struct usb_string_descriptor {
293 __u8 bLength;
294 __u8 bDescriptorType;
295
296 __le16 wData[1]; /* UTF-16LE encoded */
297} __attribute__ ((packed));
298
299/* note that "string" zero is special, it holds language codes that
300 * the device supports, not Unicode characters.
301 */
302
303/*-------------------------------------------------------------------------*/
304
305/* USB_DT_INTERFACE: Interface descriptor */
306struct usb_interface_descriptor {
307 __u8 bLength;
308 __u8 bDescriptorType;
309
310 __u8 bInterfaceNumber;
311 __u8 bAlternateSetting;
312 __u8 bNumEndpoints;
313 __u8 bInterfaceClass;
314 __u8 bInterfaceSubClass;
315 __u8 bInterfaceProtocol;
316 __u8 iInterface;
317} __attribute__ ((packed));
318
319#define USB_DT_INTERFACE_SIZE 9
320
321/*-------------------------------------------------------------------------*/
322
323/* USB_DT_ENDPOINT: Endpoint descriptor */
324struct usb_endpoint_descriptor {
325 __u8 bLength;
326 __u8 bDescriptorType;
327
328 __u8 bEndpointAddress;
329 __u8 bmAttributes;
330 __le16 wMaxPacketSize;
331 __u8 bInterval;
332
333 /* NOTE: these two are _only_ in audio endpoints. */
334 /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
335 __u8 bRefresh;
336 __u8 bSynchAddress;
337} __attribute__ ((packed));
338
339#define USB_DT_ENDPOINT_SIZE 7
340#define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
341
342
343/*
344 * Endpoints
345 */
346#define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */
347#define USB_ENDPOINT_DIR_MASK 0x80
348
349#define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */
350#define USB_ENDPOINT_XFER_CONTROL 0
351#define USB_ENDPOINT_XFER_ISOC 1
352#define USB_ENDPOINT_XFER_BULK 2
353#define USB_ENDPOINT_XFER_INT 3
354#define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
355
356
357/*-------------------------------------------------------------------------*/
358
359/* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
360struct usb_qualifier_descriptor {
361 __u8 bLength;
362 __u8 bDescriptorType;
363
364 __le16 bcdUSB;
365 __u8 bDeviceClass;
366 __u8 bDeviceSubClass;
367 __u8 bDeviceProtocol;
368 __u8 bMaxPacketSize0;
369 __u8 bNumConfigurations;
370 __u8 bRESERVED;
371} __attribute__ ((packed));
372
373
374/*-------------------------------------------------------------------------*/
375
376/* USB_DT_OTG (from OTG 1.0a supplement) */
377struct usb_otg_descriptor {
378 __u8 bLength;
379 __u8 bDescriptorType;
380
381 __u8 bmAttributes; /* support for HNP, SRP, etc */
382} __attribute__ ((packed));
383
384/* from usb_otg_descriptor.bmAttributes */
385#define USB_OTG_SRP (1 << 0)
386#define USB_OTG_HNP (1 << 1) /* swap host/device roles */
387
388/*-------------------------------------------------------------------------*/
389
390/* USB_DT_DEBUG: for special highspeed devices, replacing serial console */
391struct usb_debug_descriptor {
392 __u8 bLength;
393 __u8 bDescriptorType;
394
395 /* bulk endpoints with 8 byte maxpacket */
396 __u8 bDebugInEndpoint;
397 __u8 bDebugOutEndpoint;
398} __attribute__((packed));
399
400/*-------------------------------------------------------------------------*/
401
402/* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
403struct usb_interface_assoc_descriptor {
404 __u8 bLength;
405 __u8 bDescriptorType;
406
407 __u8 bFirstInterface;
408 __u8 bInterfaceCount;
409 __u8 bFunctionClass;
410 __u8 bFunctionSubClass;
411 __u8 bFunctionProtocol;
412 __u8 iFunction;
413} __attribute__ ((packed));
414
415
416/*-------------------------------------------------------------------------*/
417
418/* USB_DT_SECURITY: group of wireless security descriptors, including
419 * encryption types available for setting up a CC/association.
420 */
421struct usb_security_descriptor {
422 __u8 bLength;
423 __u8 bDescriptorType;
424
425 __le16 wTotalLength;
426 __u8 bNumEncryptionTypes;
427} __attribute__((packed));
428
429/*-------------------------------------------------------------------------*/
430
431/* USB_DT_KEY: used with {GET,SET}_SECURITY_DATA; only public keys
432 * may be retrieved.
433 */
434struct usb_key_descriptor {
435 __u8 bLength;
436 __u8 bDescriptorType;
437
438 __u8 tTKID[3];
439 __u8 bReserved;
440 __u8 bKeyData[0];
441} __attribute__((packed));
442
443/*-------------------------------------------------------------------------*/
444
445/* USB_DT_ENCRYPTION_TYPE: bundled in DT_SECURITY groups */
446struct usb_encryption_descriptor {
447 __u8 bLength;
448 __u8 bDescriptorType;
449
450 __u8 bEncryptionType;
451#define USB_ENC_TYPE_UNSECURE 0
452#define USB_ENC_TYPE_WIRED 1 /* non-wireless mode */
453#define USB_ENC_TYPE_CCM_1 2 /* aes128/cbc session */
454#define USB_ENC_TYPE_RSA_1 3 /* rsa3072/sha1 auth */
455 __u8 bEncryptionValue; /* use in SET_ENCRYPTION */
456 __u8 bAuthKeyIndex;
457} __attribute__((packed));
458
459
460/*-------------------------------------------------------------------------*/
461
462/* USB_DT_BOS: group of device-level capabilities */
463struct usb_bos_descriptor {
464 __u8 bLength;
465 __u8 bDescriptorType;
466
467 __le16 wTotalLength;
468 __u8 bNumDeviceCaps;
469} __attribute__((packed));
470
471/*-------------------------------------------------------------------------*/
472
473/* USB_DT_DEVICE_CAPABILITY: grouped with BOS */
474struct usb_dev_cap_header {
475 __u8 bLength;
476 __u8 bDescriptorType;
477 __u8 bDevCapabilityType;
478} __attribute__((packed));
479
480#define USB_CAP_TYPE_WIRELESS_USB 1
481
482struct usb_wireless_cap_descriptor { /* Ultra Wide Band */
483 __u8 bLength;
484 __u8 bDescriptorType;
485 __u8 bDevCapabilityType;
486
487 __u8 bmAttributes;
488#define USB_WIRELESS_P2P_DRD (1 << 1)
489#define USB_WIRELESS_BEACON_MASK (3 << 2)
490#define USB_WIRELESS_BEACON_SELF (1 << 2)
491#define USB_WIRELESS_BEACON_DIRECTED (2 << 2)
492#define USB_WIRELESS_BEACON_NONE (3 << 2)
493 __le16 wPHYRates; /* bit rates, Mbps */
494#define USB_WIRELESS_PHY_53 (1 << 0) /* always set */
495#define USB_WIRELESS_PHY_80 (1 << 1)
496#define USB_WIRELESS_PHY_107 (1 << 2) /* always set */
497#define USB_WIRELESS_PHY_160 (1 << 3)
498#define USB_WIRELESS_PHY_200 (1 << 4) /* always set */
499#define USB_WIRELESS_PHY_320 (1 << 5)
500#define USB_WIRELESS_PHY_400 (1 << 6)
501#define USB_WIRELESS_PHY_480 (1 << 7)
502 __u8 bmTFITXPowerInfo; /* TFI power levels */
503 __u8 bmFFITXPowerInfo; /* FFI power levels */
504 __le16 bmBandGroup;
505 __u8 bReserved;
506} __attribute__((packed));
507
508#define USB_CAP_TYPE_EXT 2
509
510struct usb_ext_cap_descriptor { /* Link Power Management */
511 __u8 bLength;
512 __u8 bDescriptorType;
513 __u8 bDevCapabilityType;
514 __u8 bmAttributes;
515#define USB_LPM_SUPPORT (1 << 1) /* supports LPM */
516} __attribute__((packed));
517
518/*-------------------------------------------------------------------------*/
519
520/* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with
521 * each endpoint descriptor for a wireless device
522 */
523struct usb_wireless_ep_comp_descriptor {
524 __u8 bLength;
525 __u8 bDescriptorType;
526
527 __u8 bMaxBurst;
528 __u8 bMaxSequence;
529 __le16 wMaxStreamDelay;
530 __le16 wOverTheAirPacketSize;
531 __u8 bOverTheAirInterval;
532 __u8 bmCompAttributes;
533#define USB_ENDPOINT_SWITCH_MASK 0x03 /* in bmCompAttributes */
534#define USB_ENDPOINT_SWITCH_NO 0
535#define USB_ENDPOINT_SWITCH_SWITCH 1
536#define USB_ENDPOINT_SWITCH_SCALE 2
537} __attribute__((packed));
538
539/*-------------------------------------------------------------------------*/
540
541/* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
542 * host and a device for connection set up, mutual authentication, and
543 * exchanging short lived session keys. The handshake depends on a CC.
544 */
545struct usb_handshake {
546 __u8 bMessageNumber;
547 __u8 bStatus;
548 __u8 tTKID[3];
549 __u8 bReserved;
550 __u8 CDID[16];
551 __u8 nonce[16];
552 __u8 MIC[8];
553} __attribute__((packed));
554
555/*-------------------------------------------------------------------------*/
556
557/* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
558 * A CC may also be set up using non-wireless secure channels (including
559 * wired USB!), and some devices may support CCs with multiple hosts.
560 */
561struct usb_connection_context {
562 __u8 CHID[16]; /* persistent host id */
563 __u8 CDID[16]; /* device id (unique w/in host context) */
564 __u8 CK[16]; /* connection key */
565} __attribute__((packed));
566
567/*-------------------------------------------------------------------------*/
568
569/* USB 2.0 defines three speeds, here's how Linux identifies them */
570
571enum usb_device_speed {
572 USB_SPEED_UNKNOWN = 0, /* enumerating */
573 USB_SPEED_LOW, USB_SPEED_FULL, /* usb 1.1 */
574 USB_SPEED_HIGH, /* usb 2.0 */
575 USB_SPEED_VARIABLE, /* wireless (usb 2.5) */
576};
577
578enum usb_device_state {
579 /* NOTATTACHED isn't in the USB spec, and this state acts
580 * the same as ATTACHED ... but it's clearer this way.
581 */
582 USB_STATE_NOTATTACHED = 0,
583
584 /* chapter 9 and authentication (wireless) device states */
585 USB_STATE_ATTACHED,
586 USB_STATE_POWERED, /* wired */
587 USB_STATE_UNAUTHENTICATED, /* auth */
588 USB_STATE_RECONNECTING, /* auth */
589 USB_STATE_DEFAULT, /* limited function */
590 USB_STATE_ADDRESS,
591 USB_STATE_CONFIGURED, /* most functions */
592
593 USB_STATE_SUSPENDED
594
595 /* NOTE: there are actually four different SUSPENDED
596 * states, returning to POWERED, DEFAULT, ADDRESS, or
597 * CONFIGURED respectively when SOF tokens flow again.
598 * At this level there's no difference between L1 and L2
599 * suspend states. (L2 being original USB 1.1 suspend.)
600 */
601};
602
603#endif /* __LINUX_USB_CH9_H */