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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * This file holds USB constants and structures that are needed for
4 * USB device APIs. These are used by the USB device model, which is
5 * defined in chapter 9 of the USB 2.0 specification and in the
6 * Wireless USB 1.0 (spread around). Linux has several APIs in C that
7 * need these:
8 *
9 * - the master/host side Linux-USB kernel driver API;
10 * - the "usbfs" user space API; and
11 * - the Linux "gadget" slave/device/peripheral side driver API.
12 *
13 * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
14 * act either as a USB master/host or as a USB slave/device. That means
15 * the master and slave side APIs benefit from working well together.
16 *
17 * There's also "Wireless USB", using low power short range radios for
18 * peripheral interconnection but otherwise building on the USB framework.
19 *
20 * Note all descriptors are declared '__attribute__((packed))' so that:
21 *
22 * [a] they never get padded, either internally (USB spec writers
23 * probably handled that) or externally;
24 *
25 * [b] so that accessing bigger-than-a-bytes fields will never
26 * generate bus errors on any platform, even when the location of
27 * its descriptor inside a bundle isn't "naturally aligned", and
28 *
29 * [c] for consistency, removing all doubt even when it appears to
30 * someone that the two other points are non-issues for that
31 * particular descriptor type.
32 */
33
34#ifndef __LINUX_USB_CH9_H
35#define __LINUX_USB_CH9_H
36
37#include <linux/types.h> /* __u8 etc */
38#include <asm/byteorder.h> /* le16_to_cpu */
39
40/*-------------------------------------------------------------------------*/
41
42/* CONTROL REQUEST SUPPORT */
43
44/*
45 * USB directions
46 *
47 * This bit flag is used in endpoint descriptors' bEndpointAddress field.
48 * It's also one of three fields in control requests bRequestType.
49 */
50#define USB_DIR_OUT 0 /* to device */
51#define USB_DIR_IN 0x80 /* to host */
52
53/*
54 * USB types, the second of three bRequestType fields
55 */
56#define USB_TYPE_MASK (0x03 << 5)
57#define USB_TYPE_STANDARD (0x00 << 5)
58#define USB_TYPE_CLASS (0x01 << 5)
59#define USB_TYPE_VENDOR (0x02 << 5)
60#define USB_TYPE_RESERVED (0x03 << 5)
61
62/*
63 * USB recipients, the third of three bRequestType fields
64 */
65#define USB_RECIP_MASK 0x1f
66#define USB_RECIP_DEVICE 0x00
67#define USB_RECIP_INTERFACE 0x01
68#define USB_RECIP_ENDPOINT 0x02
69#define USB_RECIP_OTHER 0x03
70/* From Wireless USB 1.0 */
71#define USB_RECIP_PORT 0x04
72#define USB_RECIP_RPIPE 0x05
73
74/*
75 * Standard requests, for the bRequest field of a SETUP packet.
76 *
77 * These are qualified by the bRequestType field, so that for example
78 * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
79 * by a GET_STATUS request.
80 */
81#define USB_REQ_GET_STATUS 0x00
82#define USB_REQ_CLEAR_FEATURE 0x01
83#define USB_REQ_SET_FEATURE 0x03
84#define USB_REQ_SET_ADDRESS 0x05
85#define USB_REQ_GET_DESCRIPTOR 0x06
86#define USB_REQ_SET_DESCRIPTOR 0x07
87#define USB_REQ_GET_CONFIGURATION 0x08
88#define USB_REQ_SET_CONFIGURATION 0x09
89#define USB_REQ_GET_INTERFACE 0x0A
90#define USB_REQ_SET_INTERFACE 0x0B
91#define USB_REQ_SYNCH_FRAME 0x0C
92#define USB_REQ_SET_SEL 0x30
93#define USB_REQ_SET_ISOCH_DELAY 0x31
94
95#define USB_REQ_SET_ENCRYPTION 0x0D /* Wireless USB */
96#define USB_REQ_GET_ENCRYPTION 0x0E
97#define USB_REQ_RPIPE_ABORT 0x0E
98#define USB_REQ_SET_HANDSHAKE 0x0F
99#define USB_REQ_RPIPE_RESET 0x0F
100#define USB_REQ_GET_HANDSHAKE 0x10
101#define USB_REQ_SET_CONNECTION 0x11
102#define USB_REQ_SET_SECURITY_DATA 0x12
103#define USB_REQ_GET_SECURITY_DATA 0x13
104#define USB_REQ_SET_WUSB_DATA 0x14
105#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
106#define USB_REQ_LOOPBACK_DATA_READ 0x16
107#define USB_REQ_SET_INTERFACE_DS 0x17
108
109/* specific requests for USB Power Delivery */
110#define USB_REQ_GET_PARTNER_PDO 20
111#define USB_REQ_GET_BATTERY_STATUS 21
112#define USB_REQ_SET_PDO 22
113#define USB_REQ_GET_VDM 23
114#define USB_REQ_SEND_VDM 24
115
116/* The Link Power Management (LPM) ECN defines USB_REQ_TEST_AND_SET command,
117 * used by hubs to put ports into a new L1 suspend state, except that it
118 * forgot to define its number ...
119 */
120
121/*
122 * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
123 * are read as a bit array returned by USB_REQ_GET_STATUS. (So there
124 * are at most sixteen features of each type.) Hubs may also support a
125 * new USB_REQ_TEST_AND_SET_FEATURE to put ports into L1 suspend.
126 */
127#define USB_DEVICE_SELF_POWERED 0 /* (read only) */
128#define USB_DEVICE_REMOTE_WAKEUP 1 /* dev may initiate wakeup */
129#define USB_DEVICE_TEST_MODE 2 /* (wired high speed only) */
130#define USB_DEVICE_BATTERY 2 /* (wireless) */
131#define USB_DEVICE_B_HNP_ENABLE 3 /* (otg) dev may initiate HNP */
132#define USB_DEVICE_WUSB_DEVICE 3 /* (wireless)*/
133#define USB_DEVICE_A_HNP_SUPPORT 4 /* (otg) RH port supports HNP */
134#define USB_DEVICE_A_ALT_HNP_SUPPORT 5 /* (otg) other RH port does */
135#define USB_DEVICE_DEBUG_MODE 6 /* (special devices only) */
136
137/*
138 * Test Mode Selectors
139 * See USB 2.0 spec Table 9-7
140 */
141#define TEST_J 1
142#define TEST_K 2
143#define TEST_SE0_NAK 3
144#define TEST_PACKET 4
145#define TEST_FORCE_EN 5
146
147/* Status Type */
148#define USB_STATUS_TYPE_STANDARD 0
149#define USB_STATUS_TYPE_PTM 1
150
151/*
152 * New Feature Selectors as added by USB 3.0
153 * See USB 3.0 spec Table 9-7
154 */
155#define USB_DEVICE_U1_ENABLE 48 /* dev may initiate U1 transition */
156#define USB_DEVICE_U2_ENABLE 49 /* dev may initiate U2 transition */
157#define USB_DEVICE_LTM_ENABLE 50 /* dev may send LTM */
158#define USB_INTRF_FUNC_SUSPEND 0 /* function suspend */
159
160#define USB_INTR_FUNC_SUSPEND_OPT_MASK 0xFF00
161/*
162 * Suspend Options, Table 9-8 USB 3.0 spec
163 */
164#define USB_INTRF_FUNC_SUSPEND_LP (1 << (8 + 0))
165#define USB_INTRF_FUNC_SUSPEND_RW (1 << (8 + 1))
166
167/*
168 * Interface status, Figure 9-5 USB 3.0 spec
169 */
170#define USB_INTRF_STAT_FUNC_RW_CAP 1
171#define USB_INTRF_STAT_FUNC_RW 2
172
173#define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */
174
175/* Bit array elements as returned by the USB_REQ_GET_STATUS request. */
176#define USB_DEV_STAT_U1_ENABLED 2 /* transition into U1 state */
177#define USB_DEV_STAT_U2_ENABLED 3 /* transition into U2 state */
178#define USB_DEV_STAT_LTM_ENABLED 4 /* Latency tolerance messages */
179
180/*
181 * Feature selectors from Table 9-8 USB Power Delivery spec
182 */
183#define USB_DEVICE_BATTERY_WAKE_MASK 40
184#define USB_DEVICE_OS_IS_PD_AWARE 41
185#define USB_DEVICE_POLICY_MODE 42
186#define USB_PORT_PR_SWAP 43
187#define USB_PORT_GOTO_MIN 44
188#define USB_PORT_RETURN_POWER 45
189#define USB_PORT_ACCEPT_PD_REQUEST 46
190#define USB_PORT_REJECT_PD_REQUEST 47
191#define USB_PORT_PORT_PD_RESET 48
192#define USB_PORT_C_PORT_PD_CHANGE 49
193#define USB_PORT_CABLE_PD_RESET 50
194#define USB_DEVICE_CHARGING_POLICY 54
195
196/**
197 * struct usb_ctrlrequest - SETUP data for a USB device control request
198 * @bRequestType: matches the USB bmRequestType field
199 * @bRequest: matches the USB bRequest field
200 * @wValue: matches the USB wValue field (le16 byte order)
201 * @wIndex: matches the USB wIndex field (le16 byte order)
202 * @wLength: matches the USB wLength field (le16 byte order)
203 *
204 * This structure is used to send control requests to a USB device. It matches
205 * the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the
206 * USB spec for a fuller description of the different fields, and what they are
207 * used for.
208 *
209 * Note that the driver for any interface can issue control requests.
210 * For most devices, interfaces don't coordinate with each other, so
211 * such requests may be made at any time.
212 */
213struct usb_ctrlrequest {
214 __u8 bRequestType;
215 __u8 bRequest;
216 __le16 wValue;
217 __le16 wIndex;
218 __le16 wLength;
219} __attribute__ ((packed));
220
221/*-------------------------------------------------------------------------*/
222
223/*
224 * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
225 * (rarely) accepted by SET_DESCRIPTOR.
226 *
227 * Note that all multi-byte values here are encoded in little endian
228 * byte order "on the wire". Within the kernel and when exposed
229 * through the Linux-USB APIs, they are not converted to cpu byte
230 * order; it is the responsibility of the client code to do this.
231 * The single exception is when device and configuration descriptors (but
232 * not other descriptors) are read from character devices
233 * (i.e. /dev/bus/usb/BBB/DDD);
234 * in this case the fields are converted to host endianness by the kernel.
235 */
236
237/*
238 * Descriptor types ... USB 2.0 spec table 9.5
239 */
240#define USB_DT_DEVICE 0x01
241#define USB_DT_CONFIG 0x02
242#define USB_DT_STRING 0x03
243#define USB_DT_INTERFACE 0x04
244#define USB_DT_ENDPOINT 0x05
245#define USB_DT_DEVICE_QUALIFIER 0x06
246#define USB_DT_OTHER_SPEED_CONFIG 0x07
247#define USB_DT_INTERFACE_POWER 0x08
248/* these are from a minor usb 2.0 revision (ECN) */
249#define USB_DT_OTG 0x09
250#define USB_DT_DEBUG 0x0a
251#define USB_DT_INTERFACE_ASSOCIATION 0x0b
252/* these are from the Wireless USB spec */
253#define USB_DT_SECURITY 0x0c
254#define USB_DT_KEY 0x0d
255#define USB_DT_ENCRYPTION_TYPE 0x0e
256#define USB_DT_BOS 0x0f
257#define USB_DT_DEVICE_CAPABILITY 0x10
258#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
259#define USB_DT_WIRE_ADAPTER 0x21
260#define USB_DT_RPIPE 0x22
261#define USB_DT_CS_RADIO_CONTROL 0x23
262/* From the T10 UAS specification */
263#define USB_DT_PIPE_USAGE 0x24
264/* From the USB 3.0 spec */
265#define USB_DT_SS_ENDPOINT_COMP 0x30
266/* From the USB 3.1 spec */
267#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
268
269/* Conventional codes for class-specific descriptors. The convention is
270 * defined in the USB "Common Class" Spec (3.11). Individual class specs
271 * are authoritative for their usage, not the "common class" writeup.
272 */
273#define USB_DT_CS_DEVICE (USB_TYPE_CLASS | USB_DT_DEVICE)
274#define USB_DT_CS_CONFIG (USB_TYPE_CLASS | USB_DT_CONFIG)
275#define USB_DT_CS_STRING (USB_TYPE_CLASS | USB_DT_STRING)
276#define USB_DT_CS_INTERFACE (USB_TYPE_CLASS | USB_DT_INTERFACE)
277#define USB_DT_CS_ENDPOINT (USB_TYPE_CLASS | USB_DT_ENDPOINT)
278
279/* All standard descriptors have these 2 fields at the beginning */
280struct usb_descriptor_header {
281 __u8 bLength;
282 __u8 bDescriptorType;
283} __attribute__ ((packed));
284
285
286/*-------------------------------------------------------------------------*/
287
288/* USB_DT_DEVICE: Device descriptor */
289struct usb_device_descriptor {
290 __u8 bLength;
291 __u8 bDescriptorType;
292
293 __le16 bcdUSB;
294 __u8 bDeviceClass;
295 __u8 bDeviceSubClass;
296 __u8 bDeviceProtocol;
297 __u8 bMaxPacketSize0;
298 __le16 idVendor;
299 __le16 idProduct;
300 __le16 bcdDevice;
301 __u8 iManufacturer;
302 __u8 iProduct;
303 __u8 iSerialNumber;
304 __u8 bNumConfigurations;
305} __attribute__ ((packed));
306
307#define USB_DT_DEVICE_SIZE 18
308
309
310/*
311 * Device and/or Interface Class codes
312 * as found in bDeviceClass or bInterfaceClass
313 * and defined by www.usb.org documents
314 */
315#define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
316#define USB_CLASS_AUDIO 1
317#define USB_CLASS_COMM 2
318#define USB_CLASS_HID 3
319#define USB_CLASS_PHYSICAL 5
320#define USB_CLASS_STILL_IMAGE 6
321#define USB_CLASS_PRINTER 7
322#define USB_CLASS_MASS_STORAGE 8
323#define USB_CLASS_HUB 9
324#define USB_CLASS_CDC_DATA 0x0a
325#define USB_CLASS_CSCID 0x0b /* chip+ smart card */
326#define USB_CLASS_CONTENT_SEC 0x0d /* content security */
327#define USB_CLASS_VIDEO 0x0e
328#define USB_CLASS_WIRELESS_CONTROLLER 0xe0
329#define USB_CLASS_MISC 0xef
330#define USB_CLASS_APP_SPEC 0xfe
331#define USB_CLASS_VENDOR_SPEC 0xff
332
333#define USB_SUBCLASS_VENDOR_SPEC 0xff
334
335/*-------------------------------------------------------------------------*/
336
337/* USB_DT_CONFIG: Configuration descriptor information.
338 *
339 * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
340 * descriptor type is different. Highspeed-capable devices can look
341 * different depending on what speed they're currently running. Only
342 * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
343 * descriptors.
344 */
345struct usb_config_descriptor {
346 __u8 bLength;
347 __u8 bDescriptorType;
348
349 __le16 wTotalLength;
350 __u8 bNumInterfaces;
351 __u8 bConfigurationValue;
352 __u8 iConfiguration;
353 __u8 bmAttributes;
354 __u8 bMaxPower;
355} __attribute__ ((packed));
356
357#define USB_DT_CONFIG_SIZE 9
358
359/* from config descriptor bmAttributes */
360#define USB_CONFIG_ATT_ONE (1 << 7) /* must be set */
361#define USB_CONFIG_ATT_SELFPOWER (1 << 6) /* self powered */
362#define USB_CONFIG_ATT_WAKEUP (1 << 5) /* can wakeup */
363#define USB_CONFIG_ATT_BATTERY (1 << 4) /* battery powered */
364
365/*-------------------------------------------------------------------------*/
366
367/* USB_DT_STRING: String descriptor */
368struct usb_string_descriptor {
369 __u8 bLength;
370 __u8 bDescriptorType;
371
372 __le16 wData[1]; /* UTF-16LE encoded */
373} __attribute__ ((packed));
374
375/* note that "string" zero is special, it holds language codes that
376 * the device supports, not Unicode characters.
377 */
378
379/*-------------------------------------------------------------------------*/
380
381/* USB_DT_INTERFACE: Interface descriptor */
382struct usb_interface_descriptor {
383 __u8 bLength;
384 __u8 bDescriptorType;
385
386 __u8 bInterfaceNumber;
387 __u8 bAlternateSetting;
388 __u8 bNumEndpoints;
389 __u8 bInterfaceClass;
390 __u8 bInterfaceSubClass;
391 __u8 bInterfaceProtocol;
392 __u8 iInterface;
393} __attribute__ ((packed));
394
395#define USB_DT_INTERFACE_SIZE 9
396
397/*-------------------------------------------------------------------------*/
398
399/* USB_DT_ENDPOINT: Endpoint descriptor */
400struct usb_endpoint_descriptor {
401 __u8 bLength;
402 __u8 bDescriptorType;
403
404 __u8 bEndpointAddress;
405 __u8 bmAttributes;
406 __le16 wMaxPacketSize;
407 __u8 bInterval;
408
409 /* NOTE: these two are _only_ in audio endpoints. */
410 /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
411 __u8 bRefresh;
412 __u8 bSynchAddress;
413} __attribute__ ((packed));
414
415#define USB_DT_ENDPOINT_SIZE 7
416#define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
417
418
419/*
420 * Endpoints
421 */
422#define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */
423#define USB_ENDPOINT_DIR_MASK 0x80
424
425#define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */
426#define USB_ENDPOINT_XFER_CONTROL 0
427#define USB_ENDPOINT_XFER_ISOC 1
428#define USB_ENDPOINT_XFER_BULK 2
429#define USB_ENDPOINT_XFER_INT 3
430#define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
431
432#define USB_ENDPOINT_MAXP_MASK 0x07ff
433#define USB_EP_MAXP_MULT_SHIFT 11
434#define USB_EP_MAXP_MULT_MASK (3 << USB_EP_MAXP_MULT_SHIFT)
435#define USB_EP_MAXP_MULT(m) \
436 (((m) & USB_EP_MAXP_MULT_MASK) >> USB_EP_MAXP_MULT_SHIFT)
437
438/* The USB 3.0 spec redefines bits 5:4 of bmAttributes as interrupt ep type. */
439#define USB_ENDPOINT_INTRTYPE 0x30
440#define USB_ENDPOINT_INTR_PERIODIC (0 << 4)
441#define USB_ENDPOINT_INTR_NOTIFICATION (1 << 4)
442
443#define USB_ENDPOINT_SYNCTYPE 0x0c
444#define USB_ENDPOINT_SYNC_NONE (0 << 2)
445#define USB_ENDPOINT_SYNC_ASYNC (1 << 2)
446#define USB_ENDPOINT_SYNC_ADAPTIVE (2 << 2)
447#define USB_ENDPOINT_SYNC_SYNC (3 << 2)
448
449#define USB_ENDPOINT_USAGE_MASK 0x30
450#define USB_ENDPOINT_USAGE_DATA 0x00
451#define USB_ENDPOINT_USAGE_FEEDBACK 0x10
452#define USB_ENDPOINT_USAGE_IMPLICIT_FB 0x20 /* Implicit feedback Data endpoint */
453
454/*-------------------------------------------------------------------------*/
455
456/**
457 * usb_endpoint_num - get the endpoint's number
458 * @epd: endpoint to be checked
459 *
460 * Returns @epd's number: 0 to 15.
461 */
462static __inline__ int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
463{
464 return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
465}
466
467/**
468 * usb_endpoint_type - get the endpoint's transfer type
469 * @epd: endpoint to be checked
470 *
471 * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
472 * to @epd's transfer type.
473 */
474static __inline__ int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
475{
476 return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
477}
478
479/**
480 * usb_endpoint_dir_in - check if the endpoint has IN direction
481 * @epd: endpoint to be checked
482 *
483 * Returns true if the endpoint is of type IN, otherwise it returns false.
484 */
485static __inline__ int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
486{
487 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN);
488}
489
490/**
491 * usb_endpoint_dir_out - check if the endpoint has OUT direction
492 * @epd: endpoint to be checked
493 *
494 * Returns true if the endpoint is of type OUT, otherwise it returns false.
495 */
496static __inline__ int usb_endpoint_dir_out(
497 const struct usb_endpoint_descriptor *epd)
498{
499 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT);
500}
501
502/**
503 * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type
504 * @epd: endpoint to be checked
505 *
506 * Returns true if the endpoint is of type bulk, otherwise it returns false.
507 */
508static __inline__ int usb_endpoint_xfer_bulk(
509 const struct usb_endpoint_descriptor *epd)
510{
511 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
512 USB_ENDPOINT_XFER_BULK);
513}
514
515/**
516 * usb_endpoint_xfer_control - check if the endpoint has control transfer type
517 * @epd: endpoint to be checked
518 *
519 * Returns true if the endpoint is of type control, otherwise it returns false.
520 */
521static __inline__ int usb_endpoint_xfer_control(
522 const struct usb_endpoint_descriptor *epd)
523{
524 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
525 USB_ENDPOINT_XFER_CONTROL);
526}
527
528/**
529 * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type
530 * @epd: endpoint to be checked
531 *
532 * Returns true if the endpoint is of type interrupt, otherwise it returns
533 * false.
534 */
535static __inline__ int usb_endpoint_xfer_int(
536 const struct usb_endpoint_descriptor *epd)
537{
538 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
539 USB_ENDPOINT_XFER_INT);
540}
541
542/**
543 * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type
544 * @epd: endpoint to be checked
545 *
546 * Returns true if the endpoint is of type isochronous, otherwise it returns
547 * false.
548 */
549static __inline__ int usb_endpoint_xfer_isoc(
550 const struct usb_endpoint_descriptor *epd)
551{
552 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
553 USB_ENDPOINT_XFER_ISOC);
554}
555
556/**
557 * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN
558 * @epd: endpoint to be checked
559 *
560 * Returns true if the endpoint has bulk transfer type and IN direction,
561 * otherwise it returns false.
562 */
563static __inline__ int usb_endpoint_is_bulk_in(
564 const struct usb_endpoint_descriptor *epd)
565{
566 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd);
567}
568
569/**
570 * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT
571 * @epd: endpoint to be checked
572 *
573 * Returns true if the endpoint has bulk transfer type and OUT direction,
574 * otherwise it returns false.
575 */
576static __inline__ int usb_endpoint_is_bulk_out(
577 const struct usb_endpoint_descriptor *epd)
578{
579 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd);
580}
581
582/**
583 * usb_endpoint_is_int_in - check if the endpoint is interrupt IN
584 * @epd: endpoint to be checked
585 *
586 * Returns true if the endpoint has interrupt transfer type and IN direction,
587 * otherwise it returns false.
588 */
589static __inline__ int usb_endpoint_is_int_in(
590 const struct usb_endpoint_descriptor *epd)
591{
592 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd);
593}
594
595/**
596 * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT
597 * @epd: endpoint to be checked
598 *
599 * Returns true if the endpoint has interrupt transfer type and OUT direction,
600 * otherwise it returns false.
601 */
602static __inline__ int usb_endpoint_is_int_out(
603 const struct usb_endpoint_descriptor *epd)
604{
605 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd);
606}
607
608/**
609 * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN
610 * @epd: endpoint to be checked
611 *
612 * Returns true if the endpoint has isochronous transfer type and IN direction,
613 * otherwise it returns false.
614 */
615static __inline__ int usb_endpoint_is_isoc_in(
616 const struct usb_endpoint_descriptor *epd)
617{
618 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd);
619}
620
621/**
622 * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT
623 * @epd: endpoint to be checked
624 *
625 * Returns true if the endpoint has isochronous transfer type and OUT direction,
626 * otherwise it returns false.
627 */
628static __inline__ int usb_endpoint_is_isoc_out(
629 const struct usb_endpoint_descriptor *epd)
630{
631 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd);
632}
633
634/**
635 * usb_endpoint_maxp - get endpoint's max packet size
636 * @epd: endpoint to be checked
637 *
638 * Returns @epd's max packet bits [10:0]
639 */
640static __inline__ int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd)
641{
642 return __le16_to_cpu(epd->wMaxPacketSize) & USB_ENDPOINT_MAXP_MASK;
643}
644
645/**
646 * usb_endpoint_maxp_mult - get endpoint's transactional opportunities
647 * @epd: endpoint to be checked
648 *
649 * Return @epd's wMaxPacketSize[12:11] + 1
650 */
651static __inline__ int
652usb_endpoint_maxp_mult(const struct usb_endpoint_descriptor *epd)
653{
654 int maxp = __le16_to_cpu(epd->wMaxPacketSize);
655
656 return USB_EP_MAXP_MULT(maxp) + 1;
657}
658
659static __inline__ int usb_endpoint_interrupt_type(
660 const struct usb_endpoint_descriptor *epd)
661{
662 return epd->bmAttributes & USB_ENDPOINT_INTRTYPE;
663}
664
665/*-------------------------------------------------------------------------*/
666
667/* USB_DT_SSP_ISOC_ENDPOINT_COMP: SuperSpeedPlus Isochronous Endpoint Companion
668 * descriptor
669 */
670struct usb_ssp_isoc_ep_comp_descriptor {
671 __u8 bLength;
672 __u8 bDescriptorType;
673 __le16 wReseved;
674 __le32 dwBytesPerInterval;
675} __attribute__ ((packed));
676
677#define USB_DT_SSP_ISOC_EP_COMP_SIZE 8
678
679/*-------------------------------------------------------------------------*/
680
681/* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
682struct usb_ss_ep_comp_descriptor {
683 __u8 bLength;
684 __u8 bDescriptorType;
685
686 __u8 bMaxBurst;
687 __u8 bmAttributes;
688 __le16 wBytesPerInterval;
689} __attribute__ ((packed));
690
691#define USB_DT_SS_EP_COMP_SIZE 6
692
693/* Bits 4:0 of bmAttributes if this is a bulk endpoint */
694static __inline__ int
695usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp)
696{
697 int max_streams;
698
699 if (!comp)
700 return 0;
701
702 max_streams = comp->bmAttributes & 0x1f;
703
704 if (!max_streams)
705 return 0;
706
707 max_streams = 1 << max_streams;
708
709 return max_streams;
710}
711
712/* Bits 1:0 of bmAttributes if this is an isoc endpoint */
713#define USB_SS_MULT(p) (1 + ((p) & 0x3))
714/* Bit 7 of bmAttributes if a SSP isoc endpoint companion descriptor exists */
715#define USB_SS_SSP_ISOC_COMP(p) ((p) & (1 << 7))
716
717/*-------------------------------------------------------------------------*/
718
719/* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
720struct usb_qualifier_descriptor {
721 __u8 bLength;
722 __u8 bDescriptorType;
723
724 __le16 bcdUSB;
725 __u8 bDeviceClass;
726 __u8 bDeviceSubClass;
727 __u8 bDeviceProtocol;
728 __u8 bMaxPacketSize0;
729 __u8 bNumConfigurations;
730 __u8 bRESERVED;
731} __attribute__ ((packed));
732
733
734/*-------------------------------------------------------------------------*/
735
736/* USB_DT_OTG (from OTG 1.0a supplement) */
737struct usb_otg_descriptor {
738 __u8 bLength;
739 __u8 bDescriptorType;
740
741 __u8 bmAttributes; /* support for HNP, SRP, etc */
742} __attribute__ ((packed));
743
744/* USB_DT_OTG (from OTG 2.0 supplement) */
745struct usb_otg20_descriptor {
746 __u8 bLength;
747 __u8 bDescriptorType;
748
749 __u8 bmAttributes; /* support for HNP, SRP and ADP, etc */
750 __le16 bcdOTG; /* OTG and EH supplement release number
751 * in binary-coded decimal(i.e. 2.0 is 0200H)
752 */
753} __attribute__ ((packed));
754
755/* from usb_otg_descriptor.bmAttributes */
756#define USB_OTG_SRP (1 << 0)
757#define USB_OTG_HNP (1 << 1) /* swap host/device roles */
758#define USB_OTG_ADP (1 << 2) /* support ADP */
759
760#define OTG_STS_SELECTOR 0xF000 /* OTG status selector */
761/*-------------------------------------------------------------------------*/
762
763/* USB_DT_DEBUG: for special highspeed devices, replacing serial console */
764struct usb_debug_descriptor {
765 __u8 bLength;
766 __u8 bDescriptorType;
767
768 /* bulk endpoints with 8 byte maxpacket */
769 __u8 bDebugInEndpoint;
770 __u8 bDebugOutEndpoint;
771} __attribute__((packed));
772
773/*-------------------------------------------------------------------------*/
774
775/* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
776struct usb_interface_assoc_descriptor {
777 __u8 bLength;
778 __u8 bDescriptorType;
779
780 __u8 bFirstInterface;
781 __u8 bInterfaceCount;
782 __u8 bFunctionClass;
783 __u8 bFunctionSubClass;
784 __u8 bFunctionProtocol;
785 __u8 iFunction;
786} __attribute__ ((packed));
787
788#define USB_DT_INTERFACE_ASSOCIATION_SIZE 8
789
790/*-------------------------------------------------------------------------*/
791
792/* USB_DT_SECURITY: group of wireless security descriptors, including
793 * encryption types available for setting up a CC/association.
794 */
795struct usb_security_descriptor {
796 __u8 bLength;
797 __u8 bDescriptorType;
798
799 __le16 wTotalLength;
800 __u8 bNumEncryptionTypes;
801} __attribute__((packed));
802
803/*-------------------------------------------------------------------------*/
804
805/* USB_DT_KEY: used with {GET,SET}_SECURITY_DATA; only public keys
806 * may be retrieved.
807 */
808struct usb_key_descriptor {
809 __u8 bLength;
810 __u8 bDescriptorType;
811
812 __u8 tTKID[3];
813 __u8 bReserved;
814 __u8 bKeyData[0];
815} __attribute__((packed));
816
817/*-------------------------------------------------------------------------*/
818
819/* USB_DT_ENCRYPTION_TYPE: bundled in DT_SECURITY groups */
820struct usb_encryption_descriptor {
821 __u8 bLength;
822 __u8 bDescriptorType;
823
824 __u8 bEncryptionType;
825#define USB_ENC_TYPE_UNSECURE 0
826#define USB_ENC_TYPE_WIRED 1 /* non-wireless mode */
827#define USB_ENC_TYPE_CCM_1 2 /* aes128/cbc session */
828#define USB_ENC_TYPE_RSA_1 3 /* rsa3072/sha1 auth */
829 __u8 bEncryptionValue; /* use in SET_ENCRYPTION */
830 __u8 bAuthKeyIndex;
831} __attribute__((packed));
832
833
834/*-------------------------------------------------------------------------*/
835
836/* USB_DT_BOS: group of device-level capabilities */
837struct usb_bos_descriptor {
838 __u8 bLength;
839 __u8 bDescriptorType;
840
841 __le16 wTotalLength;
842 __u8 bNumDeviceCaps;
843} __attribute__((packed));
844
845#define USB_DT_BOS_SIZE 5
846/*-------------------------------------------------------------------------*/
847
848/* USB_DT_DEVICE_CAPABILITY: grouped with BOS */
849struct usb_dev_cap_header {
850 __u8 bLength;
851 __u8 bDescriptorType;
852 __u8 bDevCapabilityType;
853} __attribute__((packed));
854
855#define USB_CAP_TYPE_WIRELESS_USB 1
856
857struct usb_wireless_cap_descriptor { /* Ultra Wide Band */
858 __u8 bLength;
859 __u8 bDescriptorType;
860 __u8 bDevCapabilityType;
861
862 __u8 bmAttributes;
863#define USB_WIRELESS_P2P_DRD (1 << 1)
864#define USB_WIRELESS_BEACON_MASK (3 << 2)
865#define USB_WIRELESS_BEACON_SELF (1 << 2)
866#define USB_WIRELESS_BEACON_DIRECTED (2 << 2)
867#define USB_WIRELESS_BEACON_NONE (3 << 2)
868 __le16 wPHYRates; /* bit rates, Mbps */
869#define USB_WIRELESS_PHY_53 (1 << 0) /* always set */
870#define USB_WIRELESS_PHY_80 (1 << 1)
871#define USB_WIRELESS_PHY_107 (1 << 2) /* always set */
872#define USB_WIRELESS_PHY_160 (1 << 3)
873#define USB_WIRELESS_PHY_200 (1 << 4) /* always set */
874#define USB_WIRELESS_PHY_320 (1 << 5)
875#define USB_WIRELESS_PHY_400 (1 << 6)
876#define USB_WIRELESS_PHY_480 (1 << 7)
877 __u8 bmTFITXPowerInfo; /* TFI power levels */
878 __u8 bmFFITXPowerInfo; /* FFI power levels */
879 __le16 bmBandGroup;
880 __u8 bReserved;
881} __attribute__((packed));
882
883#define USB_DT_USB_WIRELESS_CAP_SIZE 11
884
885/* USB 2.0 Extension descriptor */
886#define USB_CAP_TYPE_EXT 2
887
888struct usb_ext_cap_descriptor { /* Link Power Management */
889 __u8 bLength;
890 __u8 bDescriptorType;
891 __u8 bDevCapabilityType;
892 __le32 bmAttributes;
893#define USB_LPM_SUPPORT (1 << 1) /* supports LPM */
894#define USB_BESL_SUPPORT (1 << 2) /* supports BESL */
895#define USB_BESL_BASELINE_VALID (1 << 3) /* Baseline BESL valid*/
896#define USB_BESL_DEEP_VALID (1 << 4) /* Deep BESL valid */
897#define USB_GET_BESL_BASELINE(p) (((p) & (0xf << 8)) >> 8)
898#define USB_GET_BESL_DEEP(p) (((p) & (0xf << 12)) >> 12)
899} __attribute__((packed));
900
901#define USB_DT_USB_EXT_CAP_SIZE 7
902
903/*
904 * SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB
905 * specific device level capabilities
906 */
907#define USB_SS_CAP_TYPE 3
908struct usb_ss_cap_descriptor { /* Link Power Management */
909 __u8 bLength;
910 __u8 bDescriptorType;
911 __u8 bDevCapabilityType;
912 __u8 bmAttributes;
913#define USB_LTM_SUPPORT (1 << 1) /* supports LTM */
914 __le16 wSpeedSupported;
915#define USB_LOW_SPEED_OPERATION (1) /* Low speed operation */
916#define USB_FULL_SPEED_OPERATION (1 << 1) /* Full speed operation */
917#define USB_HIGH_SPEED_OPERATION (1 << 2) /* High speed operation */
918#define USB_5GBPS_OPERATION (1 << 3) /* Operation at 5Gbps */
919 __u8 bFunctionalitySupport;
920 __u8 bU1devExitLat;
921 __le16 bU2DevExitLat;
922} __attribute__((packed));
923
924#define USB_DT_USB_SS_CAP_SIZE 10
925
926/*
927 * Container ID Capability descriptor: Defines the instance unique ID used to
928 * identify the instance across all operating modes
929 */
930#define CONTAINER_ID_TYPE 4
931struct usb_ss_container_id_descriptor {
932 __u8 bLength;
933 __u8 bDescriptorType;
934 __u8 bDevCapabilityType;
935 __u8 bReserved;
936 __u8 ContainerID[16]; /* 128-bit number */
937} __attribute__((packed));
938
939#define USB_DT_USB_SS_CONTN_ID_SIZE 20
940
941/*
942 * SuperSpeed Plus USB Capability descriptor: Defines the set of
943 * SuperSpeed Plus USB specific device level capabilities
944 */
945#define USB_SSP_CAP_TYPE 0xa
946struct usb_ssp_cap_descriptor {
947 __u8 bLength;
948 __u8 bDescriptorType;
949 __u8 bDevCapabilityType;
950 __u8 bReserved;
951 __le32 bmAttributes;
952#define USB_SSP_SUBLINK_SPEED_ATTRIBS (0x1f << 0) /* sublink speed entries */
953#define USB_SSP_SUBLINK_SPEED_IDS (0xf << 5) /* speed ID entries */
954 __le16 wFunctionalitySupport;
955#define USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID (0xf)
956#define USB_SSP_MIN_RX_LANE_COUNT (0xf << 8)
957#define USB_SSP_MIN_TX_LANE_COUNT (0xf << 12)
958 __le16 wReserved;
959 __le32 bmSublinkSpeedAttr[1]; /* list of sublink speed attrib entries */
960#define USB_SSP_SUBLINK_SPEED_SSID (0xf) /* sublink speed ID */
961#define USB_SSP_SUBLINK_SPEED_LSE (0x3 << 4) /* Lanespeed exponent */
962#define USB_SSP_SUBLINK_SPEED_ST (0x3 << 6) /* Sublink type */
963#define USB_SSP_SUBLINK_SPEED_RSVD (0x3f << 8) /* Reserved */
964#define USB_SSP_SUBLINK_SPEED_LP (0x3 << 14) /* Link protocol */
965#define USB_SSP_SUBLINK_SPEED_LSM (0xff << 16) /* Lanespeed mantissa */
966} __attribute__((packed));
967
968/*
969 * USB Power Delivery Capability Descriptor:
970 * Defines capabilities for PD
971 */
972/* Defines the various PD Capabilities of this device */
973#define USB_PD_POWER_DELIVERY_CAPABILITY 0x06
974/* Provides information on each battery supported by the device */
975#define USB_PD_BATTERY_INFO_CAPABILITY 0x07
976/* The Consumer characteristics of a Port on the device */
977#define USB_PD_PD_CONSUMER_PORT_CAPABILITY 0x08
978/* The provider characteristics of a Port on the device */
979#define USB_PD_PD_PROVIDER_PORT_CAPABILITY 0x09
980
981struct usb_pd_cap_descriptor {
982 __u8 bLength;
983 __u8 bDescriptorType;
984 __u8 bDevCapabilityType; /* set to USB_PD_POWER_DELIVERY_CAPABILITY */
985 __u8 bReserved;
986 __le32 bmAttributes;
987#define USB_PD_CAP_BATTERY_CHARGING (1 << 1) /* supports Battery Charging specification */
988#define USB_PD_CAP_USB_PD (1 << 2) /* supports USB Power Delivery specification */
989#define USB_PD_CAP_PROVIDER (1 << 3) /* can provide power */
990#define USB_PD_CAP_CONSUMER (1 << 4) /* can consume power */
991#define USB_PD_CAP_CHARGING_POLICY (1 << 5) /* supports CHARGING_POLICY feature */
992#define USB_PD_CAP_TYPE_C_CURRENT (1 << 6) /* supports power capabilities defined in the USB Type-C Specification */
993
994#define USB_PD_CAP_PWR_AC (1 << 8)
995#define USB_PD_CAP_PWR_BAT (1 << 9)
996#define USB_PD_CAP_PWR_USE_V_BUS (1 << 14)
997
998 __le16 bmProviderPorts; /* Bit zero refers to the UFP of the device */
999 __le16 bmConsumerPorts;
1000 __le16 bcdBCVersion;
1001 __le16 bcdPDVersion;
1002 __le16 bcdUSBTypeCVersion;
1003} __attribute__((packed));
1004
1005struct usb_pd_cap_battery_info_descriptor {
1006 __u8 bLength;
1007 __u8 bDescriptorType;
1008 __u8 bDevCapabilityType;
1009 /* Index of string descriptor shall contain the user friendly name for this battery */
1010 __u8 iBattery;
1011 /* Index of string descriptor shall contain the Serial Number String for this battery */
1012 __u8 iSerial;
1013 __u8 iManufacturer;
1014 __u8 bBatteryId; /* uniquely identifies this battery in status Messages */
1015 __u8 bReserved;
1016 /*
1017 * Shall contain the Battery Charge value above which this
1018 * battery is considered to be fully charged but not necessarily
1019 * “topped off.”
1020 */
1021 __le32 dwChargedThreshold; /* in mWh */
1022 /*
1023 * Shall contain the minimum charge level of this battery such
1024 * that above this threshold, a device can be assured of being
1025 * able to power up successfully (see Battery Charging 1.2).
1026 */
1027 __le32 dwWeakThreshold; /* in mWh */
1028 __le32 dwBatteryDesignCapacity; /* in mWh */
1029 __le32 dwBatteryLastFullchargeCapacity; /* in mWh */
1030} __attribute__((packed));
1031
1032struct usb_pd_cap_consumer_port_descriptor {
1033 __u8 bLength;
1034 __u8 bDescriptorType;
1035 __u8 bDevCapabilityType;
1036 __u8 bReserved;
1037 __u8 bmCapabilities;
1038/* port will oerate under: */
1039#define USB_PD_CAP_CONSUMER_BC (1 << 0) /* BC */
1040#define USB_PD_CAP_CONSUMER_PD (1 << 1) /* PD */
1041#define USB_PD_CAP_CONSUMER_TYPE_C (1 << 2) /* USB Type-C Current */
1042 __le16 wMinVoltage; /* in 50mV units */
1043 __le16 wMaxVoltage; /* in 50mV units */
1044 __u16 wReserved;
1045 __le32 dwMaxOperatingPower; /* in 10 mW - operating at steady state */
1046 __le32 dwMaxPeakPower; /* in 10mW units - operating at peak power */
1047 __le32 dwMaxPeakPowerTime; /* in 100ms units - duration of peak */
1048#define USB_PD_CAP_CONSUMER_UNKNOWN_PEAK_POWER_TIME 0xffff
1049} __attribute__((packed));
1050
1051struct usb_pd_cap_provider_port_descriptor {
1052 __u8 bLength;
1053 __u8 bDescriptorType;
1054 __u8 bDevCapabilityType;
1055 __u8 bReserved1;
1056 __u8 bmCapabilities;
1057/* port will oerate under: */
1058#define USB_PD_CAP_PROVIDER_BC (1 << 0) /* BC */
1059#define USB_PD_CAP_PROVIDER_PD (1 << 1) /* PD */
1060#define USB_PD_CAP_PROVIDER_TYPE_C (1 << 2) /* USB Type-C Current */
1061 __u8 bNumOfPDObjects;
1062 __u8 bReserved2;
1063 __le32 wPowerDataObject[];
1064} __attribute__((packed));
1065
1066/*
1067 * Precision time measurement capability descriptor: advertised by devices and
1068 * hubs that support PTM
1069 */
1070#define USB_PTM_CAP_TYPE 0xb
1071struct usb_ptm_cap_descriptor {
1072 __u8 bLength;
1073 __u8 bDescriptorType;
1074 __u8 bDevCapabilityType;
1075} __attribute__((packed));
1076
1077#define USB_DT_USB_PTM_ID_SIZE 3
1078/*
1079 * The size of the descriptor for the Sublink Speed Attribute Count
1080 * (SSAC) specified in bmAttributes[4:0]. SSAC is zero-based
1081 */
1082#define USB_DT_USB_SSP_CAP_SIZE(ssac) (12 + (ssac + 1) * 4)
1083
1084/*-------------------------------------------------------------------------*/
1085
1086/* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with
1087 * each endpoint descriptor for a wireless device
1088 */
1089struct usb_wireless_ep_comp_descriptor {
1090 __u8 bLength;
1091 __u8 bDescriptorType;
1092
1093 __u8 bMaxBurst;
1094 __u8 bMaxSequence;
1095 __le16 wMaxStreamDelay;
1096 __le16 wOverTheAirPacketSize;
1097 __u8 bOverTheAirInterval;
1098 __u8 bmCompAttributes;
1099#define USB_ENDPOINT_SWITCH_MASK 0x03 /* in bmCompAttributes */
1100#define USB_ENDPOINT_SWITCH_NO 0
1101#define USB_ENDPOINT_SWITCH_SWITCH 1
1102#define USB_ENDPOINT_SWITCH_SCALE 2
1103} __attribute__((packed));
1104
1105/*-------------------------------------------------------------------------*/
1106
1107/* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
1108 * host and a device for connection set up, mutual authentication, and
1109 * exchanging short lived session keys. The handshake depends on a CC.
1110 */
1111struct usb_handshake {
1112 __u8 bMessageNumber;
1113 __u8 bStatus;
1114 __u8 tTKID[3];
1115 __u8 bReserved;
1116 __u8 CDID[16];
1117 __u8 nonce[16];
1118 __u8 MIC[8];
1119} __attribute__((packed));
1120
1121/*-------------------------------------------------------------------------*/
1122
1123/* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
1124 * A CC may also be set up using non-wireless secure channels (including
1125 * wired USB!), and some devices may support CCs with multiple hosts.
1126 */
1127struct usb_connection_context {
1128 __u8 CHID[16]; /* persistent host id */
1129 __u8 CDID[16]; /* device id (unique w/in host context) */
1130 __u8 CK[16]; /* connection key */
1131} __attribute__((packed));
1132
1133/*-------------------------------------------------------------------------*/
1134
1135/* USB 2.0 defines three speeds, here's how Linux identifies them */
1136
1137enum usb_device_speed {
1138 USB_SPEED_UNKNOWN = 0, /* enumerating */
1139 USB_SPEED_LOW, USB_SPEED_FULL, /* usb 1.1 */
1140 USB_SPEED_HIGH, /* usb 2.0 */
1141 USB_SPEED_WIRELESS, /* wireless (usb 2.5) */
1142 USB_SPEED_SUPER, /* usb 3.0 */
1143 USB_SPEED_SUPER_PLUS, /* usb 3.1 */
1144};
1145
1146
1147enum usb_device_state {
1148 /* NOTATTACHED isn't in the USB spec, and this state acts
1149 * the same as ATTACHED ... but it's clearer this way.
1150 */
1151 USB_STATE_NOTATTACHED = 0,
1152
1153 /* chapter 9 and authentication (wireless) device states */
1154 USB_STATE_ATTACHED,
1155 USB_STATE_POWERED, /* wired */
1156 USB_STATE_RECONNECTING, /* auth */
1157 USB_STATE_UNAUTHENTICATED, /* auth */
1158 USB_STATE_DEFAULT, /* limited function */
1159 USB_STATE_ADDRESS,
1160 USB_STATE_CONFIGURED, /* most functions */
1161
1162 USB_STATE_SUSPENDED
1163
1164 /* NOTE: there are actually four different SUSPENDED
1165 * states, returning to POWERED, DEFAULT, ADDRESS, or
1166 * CONFIGURED respectively when SOF tokens flow again.
1167 * At this level there's no difference between L1 and L2
1168 * suspend states. (L2 being original USB 1.1 suspend.)
1169 */
1170};
1171
1172enum usb3_link_state {
1173 USB3_LPM_U0 = 0,
1174 USB3_LPM_U1,
1175 USB3_LPM_U2,
1176 USB3_LPM_U3
1177};
1178
1179/*
1180 * A U1 timeout of 0x0 means the parent hub will reject any transitions to U1.
1181 * 0xff means the parent hub will accept transitions to U1, but will not
1182 * initiate a transition.
1183 *
1184 * A U1 timeout of 0x1 to 0x7F also causes the hub to initiate a transition to
1185 * U1 after that many microseconds. Timeouts of 0x80 to 0xFE are reserved
1186 * values.
1187 *
1188 * A U2 timeout of 0x0 means the parent hub will reject any transitions to U2.
1189 * 0xff means the parent hub will accept transitions to U2, but will not
1190 * initiate a transition.
1191 *
1192 * A U2 timeout of 0x1 to 0xFE also causes the hub to initiate a transition to
1193 * U2 after N*256 microseconds. Therefore a U2 timeout value of 0x1 means a U2
1194 * idle timer of 256 microseconds, 0x2 means 512 microseconds, 0xFE means
1195 * 65.024ms.
1196 */
1197#define USB3_LPM_DISABLED 0x0
1198#define USB3_LPM_U1_MAX_TIMEOUT 0x7F
1199#define USB3_LPM_U2_MAX_TIMEOUT 0xFE
1200#define USB3_LPM_DEVICE_INITIATED 0xFF
1201
1202struct usb_set_sel_req {
1203 __u8 u1_sel;
1204 __u8 u1_pel;
1205 __le16 u2_sel;
1206 __le16 u2_pel;
1207} __attribute__ ((packed));
1208
1209/*
1210 * The Set System Exit Latency control transfer provides one byte each for
1211 * U1 SEL and U1 PEL, so the max exit latency is 0xFF. U2 SEL and U2 PEL each
1212 * are two bytes long.
1213 */
1214#define USB3_LPM_MAX_U1_SEL_PEL 0xFF
1215#define USB3_LPM_MAX_U2_SEL_PEL 0xFFFF
1216
1217/*-------------------------------------------------------------------------*/
1218
1219/*
1220 * As per USB compliance update, a device that is actively drawing
1221 * more than 100mA from USB must report itself as bus-powered in
1222 * the GetStatus(DEVICE) call.
1223 * http://compliance.usb.org/index.asp?UpdateFile=Electrical&Format=Standard#34
1224 */
1225#define USB_SELF_POWER_VBUS_MAX_DRAW 100
1226
1227#endif /* __LINUX_USB_CH9_H */
1228

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