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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 spec (now defunct). 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 * Note all descriptors are declared '__attribute__((packed))' so that:
18 *
19 * [a] they never get padded, either internally (USB spec writers
20 * probably handled that) or externally;
21 *
22 * [b] so that accessing bigger-than-a-bytes fields will never
23 * generate bus errors on any platform, even when the location of
24 * its descriptor inside a bundle isn't "naturally aligned", and
25 *
26 * [c] for consistency, removing all doubt even when it appears to
27 * someone that the two other points are non-issues for that
28 * particular descriptor type.
29 */
30
31#ifndef __LINUX_USB_CH9_H
32#define __LINUX_USB_CH9_H
33
34#include <linux/types.h> /* __u8 etc */
35#include <asm/byteorder.h> /* le16_to_cpu */
36
37/*-------------------------------------------------------------------------*/
38
39/* CONTROL REQUEST SUPPORT */
40
41/*
42 * USB directions
43 *
44 * This bit flag is used in endpoint descriptors' bEndpointAddress field.
45 * It's also one of three fields in control requests bRequestType.
46 */
47#define USB_DIR_OUT 0 /* to device */
48#define USB_DIR_IN 0x80 /* to host */
49
50/*
51 * USB types, the second of three bRequestType fields
52 */
53#define USB_TYPE_MASK (0x03 << 5)
54#define USB_TYPE_STANDARD (0x00 << 5)
55#define USB_TYPE_CLASS (0x01 << 5)
56#define USB_TYPE_VENDOR (0x02 << 5)
57#define USB_TYPE_RESERVED (0x03 << 5)
58
59/*
60 * USB recipients, the third of three bRequestType fields
61 */
62#define USB_RECIP_MASK 0x1f
63#define USB_RECIP_DEVICE 0x00
64#define USB_RECIP_INTERFACE 0x01
65#define USB_RECIP_ENDPOINT 0x02
66#define USB_RECIP_OTHER 0x03
67/* From Wireless USB 1.0 */
68#define USB_RECIP_PORT 0x04
69#define USB_RECIP_RPIPE 0x05
70
71/*
72 * Standard requests, for the bRequest field of a SETUP packet.
73 *
74 * These are qualified by the bRequestType field, so that for example
75 * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
76 * by a GET_STATUS request.
77 */
78#define USB_REQ_GET_STATUS 0x00
79#define USB_REQ_CLEAR_FEATURE 0x01
80#define USB_REQ_SET_FEATURE 0x03
81#define USB_REQ_SET_ADDRESS 0x05
82#define USB_REQ_GET_DESCRIPTOR 0x06
83#define USB_REQ_SET_DESCRIPTOR 0x07
84#define USB_REQ_GET_CONFIGURATION 0x08
85#define USB_REQ_SET_CONFIGURATION 0x09
86#define USB_REQ_GET_INTERFACE 0x0A
87#define USB_REQ_SET_INTERFACE 0x0B
88#define USB_REQ_SYNCH_FRAME 0x0C
89#define USB_REQ_SET_SEL 0x30
90#define USB_REQ_SET_ISOCH_DELAY 0x31
91
92#define USB_REQ_SET_ENCRYPTION 0x0D /* Wireless USB */
93#define USB_REQ_GET_ENCRYPTION 0x0E
94#define USB_REQ_RPIPE_ABORT 0x0E
95#define USB_REQ_SET_HANDSHAKE 0x0F
96#define USB_REQ_RPIPE_RESET 0x0F
97#define USB_REQ_GET_HANDSHAKE 0x10
98#define USB_REQ_SET_CONNECTION 0x11
99#define USB_REQ_SET_SECURITY_DATA 0x12
100#define USB_REQ_GET_SECURITY_DATA 0x13
101#define USB_REQ_SET_WUSB_DATA 0x14
102#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
103#define USB_REQ_LOOPBACK_DATA_READ 0x16
104#define USB_REQ_SET_INTERFACE_DS 0x17
105
106/* specific requests for USB Power Delivery */
107#define USB_REQ_GET_PARTNER_PDO 20
108#define USB_REQ_GET_BATTERY_STATUS 21
109#define USB_REQ_SET_PDO 22
110#define USB_REQ_GET_VDM 23
111#define USB_REQ_SEND_VDM 24
112
113/* The Link Power Management (LPM) ECN defines USB_REQ_TEST_AND_SET command,
114 * used by hubs to put ports into a new L1 suspend state, except that it
115 * forgot to define its number ...
116 */
117
118/*
119 * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
120 * are read as a bit array returned by USB_REQ_GET_STATUS. (So there
121 * are at most sixteen features of each type.) Hubs may also support a
122 * new USB_REQ_TEST_AND_SET_FEATURE to put ports into L1 suspend.
123 */
124#define USB_DEVICE_SELF_POWERED 0 /* (read only) */
125#define USB_DEVICE_REMOTE_WAKEUP 1 /* dev may initiate wakeup */
126#define USB_DEVICE_TEST_MODE 2 /* (wired high speed only) */
127#define USB_DEVICE_BATTERY 2 /* (wireless) */
128#define USB_DEVICE_B_HNP_ENABLE 3 /* (otg) dev may initiate HNP */
129#define USB_DEVICE_WUSB_DEVICE 3 /* (wireless)*/
130#define USB_DEVICE_A_HNP_SUPPORT 4 /* (otg) RH port supports HNP */
131#define USB_DEVICE_A_ALT_HNP_SUPPORT 5 /* (otg) other RH port does */
132#define USB_DEVICE_DEBUG_MODE 6 /* (special devices only) */
133
134/*
135 * Test Mode Selectors
136 * See USB 2.0 spec Table 9-7
137 */
138#define USB_TEST_J 1
139#define USB_TEST_K 2
140#define USB_TEST_SE0_NAK 3
141#define USB_TEST_PACKET 4
142#define USB_TEST_FORCE_ENABLE 5
143
144/* Status Type */
145#define USB_STATUS_TYPE_STANDARD 0
146#define USB_STATUS_TYPE_PTM 1
147
148/*
149 * New Feature Selectors as added by USB 3.0
150 * See USB 3.0 spec Table 9-7
151 */
152#define USB_DEVICE_U1_ENABLE 48 /* dev may initiate U1 transition */
153#define USB_DEVICE_U2_ENABLE 49 /* dev may initiate U2 transition */
154#define USB_DEVICE_LTM_ENABLE 50 /* dev may send LTM */
155#define USB_INTRF_FUNC_SUSPEND 0 /* function suspend */
156
157#define USB_INTR_FUNC_SUSPEND_OPT_MASK 0xFF00
158/*
159 * Suspend Options, Table 9-8 USB 3.0 spec
160 */
161#define USB_INTRF_FUNC_SUSPEND_LP (1 << (8 + 0))
162#define USB_INTRF_FUNC_SUSPEND_RW (1 << (8 + 1))
163
164/*
165 * Interface status, Figure 9-5 USB 3.0 spec
166 */
167#define USB_INTRF_STAT_FUNC_RW_CAP 1
168#define USB_INTRF_STAT_FUNC_RW 2
169
170#define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */
171
172/* Bit array elements as returned by the USB_REQ_GET_STATUS request. */
173#define USB_DEV_STAT_U1_ENABLED 2 /* transition into U1 state */
174#define USB_DEV_STAT_U2_ENABLED 3 /* transition into U2 state */
175#define USB_DEV_STAT_LTM_ENABLED 4 /* Latency tolerance messages */
176
177/*
178 * Feature selectors from Table 9-8 USB Power Delivery spec
179 */
180#define USB_DEVICE_BATTERY_WAKE_MASK 40
181#define USB_DEVICE_OS_IS_PD_AWARE 41
182#define USB_DEVICE_POLICY_MODE 42
183#define USB_PORT_PR_SWAP 43
184#define USB_PORT_GOTO_MIN 44
185#define USB_PORT_RETURN_POWER 45
186#define USB_PORT_ACCEPT_PD_REQUEST 46
187#define USB_PORT_REJECT_PD_REQUEST 47
188#define USB_PORT_PORT_PD_RESET 48
189#define USB_PORT_C_PORT_PD_CHANGE 49
190#define USB_PORT_CABLE_PD_RESET 50
191#define USB_DEVICE_CHARGING_POLICY 54
192
193/**
194 * struct usb_ctrlrequest - SETUP data for a USB device control request
195 * @bRequestType: matches the USB bmRequestType field
196 * @bRequest: matches the USB bRequest field
197 * @wValue: matches the USB wValue field (le16 byte order)
198 * @wIndex: matches the USB wIndex field (le16 byte order)
199 * @wLength: matches the USB wLength field (le16 byte order)
200 *
201 * This structure is used to send control requests to a USB device. It matches
202 * the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the
203 * USB spec for a fuller description of the different fields, and what they are
204 * used for.
205 *
206 * Note that the driver for any interface can issue control requests.
207 * For most devices, interfaces don't coordinate with each other, so
208 * such requests may be made at any time.
209 */
210struct usb_ctrlrequest {
211 __u8 bRequestType;
212 __u8 bRequest;
213 __le16 wValue;
214 __le16 wIndex;
215 __le16 wLength;
216} __attribute__ ((packed));
217
218/*-------------------------------------------------------------------------*/
219
220/*
221 * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
222 * (rarely) accepted by SET_DESCRIPTOR.
223 *
224 * Note that all multi-byte values here are encoded in little endian
225 * byte order "on the wire". Within the kernel and when exposed
226 * through the Linux-USB APIs, they are not converted to cpu byte
227 * order; it is the responsibility of the client code to do this.
228 * The single exception is when device and configuration descriptors (but
229 * not other descriptors) are read from character devices
230 * (i.e. /dev/bus/usb/BBB/DDD);
231 * in this case the fields are converted to host endianness by the kernel.
232 */
233
234/*
235 * Descriptor types ... USB 2.0 spec table 9.5
236 */
237#define USB_DT_DEVICE 0x01
238#define USB_DT_CONFIG 0x02
239#define USB_DT_STRING 0x03
240#define USB_DT_INTERFACE 0x04
241#define USB_DT_ENDPOINT 0x05
242#define USB_DT_DEVICE_QUALIFIER 0x06
243#define USB_DT_OTHER_SPEED_CONFIG 0x07
244#define USB_DT_INTERFACE_POWER 0x08
245/* these are from a minor usb 2.0 revision (ECN) */
246#define USB_DT_OTG 0x09
247#define USB_DT_DEBUG 0x0a
248#define USB_DT_INTERFACE_ASSOCIATION 0x0b
249/* these are from the Wireless USB spec */
250#define USB_DT_SECURITY 0x0c
251#define USB_DT_KEY 0x0d
252#define USB_DT_ENCRYPTION_TYPE 0x0e
253#define USB_DT_BOS 0x0f
254#define USB_DT_DEVICE_CAPABILITY 0x10
255#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
256/* From the eUSB2 spec */
257#define USB_DT_EUSB2_ISOC_ENDPOINT_COMP 0x12
258/* From Wireless USB spec */
259#define USB_DT_WIRE_ADAPTER 0x21
260/* From USB Device Firmware Upgrade Specification, Revision 1.1 */
261#define USB_DT_DFU_FUNCTIONAL 0x21
262/* these are from the Wireless USB spec */
263#define USB_DT_RPIPE 0x22
264#define USB_DT_CS_RADIO_CONTROL 0x23
265/* From the T10 UAS specification */
266#define USB_DT_PIPE_USAGE 0x24
267/* From the USB 3.0 spec */
268#define USB_DT_SS_ENDPOINT_COMP 0x30
269/* From the USB 3.1 spec */
270#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
271
272/* Conventional codes for class-specific descriptors. The convention is
273 * defined in the USB "Common Class" Spec (3.11). Individual class specs
274 * are authoritative for their usage, not the "common class" writeup.
275 */
276#define USB_DT_CS_DEVICE (USB_TYPE_CLASS | USB_DT_DEVICE)
277#define USB_DT_CS_CONFIG (USB_TYPE_CLASS | USB_DT_CONFIG)
278#define USB_DT_CS_STRING (USB_TYPE_CLASS | USB_DT_STRING)
279#define USB_DT_CS_INTERFACE (USB_TYPE_CLASS | USB_DT_INTERFACE)
280#define USB_DT_CS_ENDPOINT (USB_TYPE_CLASS | USB_DT_ENDPOINT)
281
282/* All standard descriptors have these 2 fields at the beginning */
283struct usb_descriptor_header {
284 __u8 bLength;
285 __u8 bDescriptorType;
286} __attribute__ ((packed));
287
288
289/*-------------------------------------------------------------------------*/
290
291/* USB_DT_DEVICE: Device descriptor */
292struct usb_device_descriptor {
293 __u8 bLength;
294 __u8 bDescriptorType;
295
296 __le16 bcdUSB;
297 __u8 bDeviceClass;
298 __u8 bDeviceSubClass;
299 __u8 bDeviceProtocol;
300 __u8 bMaxPacketSize0;
301 __le16 idVendor;
302 __le16 idProduct;
303 __le16 bcdDevice;
304 __u8 iManufacturer;
305 __u8 iProduct;
306 __u8 iSerialNumber;
307 __u8 bNumConfigurations;
308} __attribute__ ((packed));
309
310#define USB_DT_DEVICE_SIZE 18
311
312
313/*
314 * Device and/or Interface Class codes
315 * as found in bDeviceClass or bInterfaceClass
316 * and defined by www.usb.org documents
317 */
318#define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
319#define USB_CLASS_AUDIO 1
320#define USB_CLASS_COMM 2
321#define USB_CLASS_HID 3
322#define USB_CLASS_PHYSICAL 5
323#define USB_CLASS_STILL_IMAGE 6
324#define USB_CLASS_PRINTER 7
325#define USB_CLASS_MASS_STORAGE 8
326#define USB_CLASS_HUB 9
327#define USB_CLASS_CDC_DATA 0x0a
328#define USB_CLASS_CSCID 0x0b /* chip+ smart card */
329#define USB_CLASS_CONTENT_SEC 0x0d /* content security */
330#define USB_CLASS_VIDEO 0x0e
331#define USB_CLASS_WIRELESS_CONTROLLER 0xe0
332#define USB_CLASS_PERSONAL_HEALTHCARE 0x0f
333#define USB_CLASS_AUDIO_VIDEO 0x10
334#define USB_CLASS_BILLBOARD 0x11
335#define USB_CLASS_USB_TYPE_C_BRIDGE 0x12
336#define USB_CLASS_MCTP 0x14
337#define USB_CLASS_MISC 0xef
338#define USB_CLASS_APP_SPEC 0xfe
339#define USB_SUBCLASS_DFU 0x01
340
341#define USB_CLASS_VENDOR_SPEC 0xff
342#define USB_SUBCLASS_VENDOR_SPEC 0xff
343
344/*-------------------------------------------------------------------------*/
345
346/* USB_DT_CONFIG: Configuration descriptor information.
347 *
348 * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
349 * descriptor type is different. Highspeed-capable devices can look
350 * different depending on what speed they're currently running. Only
351 * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
352 * descriptors.
353 */
354struct usb_config_descriptor {
355 __u8 bLength;
356 __u8 bDescriptorType;
357
358 __le16 wTotalLength;
359 __u8 bNumInterfaces;
360 __u8 bConfigurationValue;
361 __u8 iConfiguration;
362 __u8 bmAttributes;
363 __u8 bMaxPower;
364} __attribute__ ((packed));
365
366#define USB_DT_CONFIG_SIZE 9
367
368/* from config descriptor bmAttributes */
369#define USB_CONFIG_ATT_ONE (1 << 7) /* must be set */
370#define USB_CONFIG_ATT_SELFPOWER (1 << 6) /* self powered */
371#define USB_CONFIG_ATT_WAKEUP (1 << 5) /* can wakeup */
372#define USB_CONFIG_ATT_BATTERY (1 << 4) /* battery powered */
373
374/*-------------------------------------------------------------------------*/
375
376/* USB String descriptors can contain at most 126 characters. */
377#define USB_MAX_STRING_LEN 126
378
379/* USB_DT_STRING: String descriptor */
380struct usb_string_descriptor {
381 __u8 bLength;
382 __u8 bDescriptorType;
383
384 union {
385 __le16 legacy_padding;
386 __DECLARE_FLEX_ARRAY(__le16, wData); /* UTF-16LE encoded */
387 };
388} __attribute__ ((packed));
389
390/* note that "string" zero is special, it holds language codes that
391 * the device supports, not Unicode characters.
392 */
393
394/*-------------------------------------------------------------------------*/
395
396/* USB_DT_INTERFACE: Interface descriptor */
397struct usb_interface_descriptor {
398 __u8 bLength;
399 __u8 bDescriptorType;
400
401 __u8 bInterfaceNumber;
402 __u8 bAlternateSetting;
403 __u8 bNumEndpoints;
404 __u8 bInterfaceClass;
405 __u8 bInterfaceSubClass;
406 __u8 bInterfaceProtocol;
407 __u8 iInterface;
408} __attribute__ ((packed));
409
410#define USB_DT_INTERFACE_SIZE 9
411
412/*-------------------------------------------------------------------------*/
413
414/* USB_DT_ENDPOINT: Endpoint descriptor */
415struct usb_endpoint_descriptor {
416 __u8 bLength;
417 __u8 bDescriptorType;
418
419 __u8 bEndpointAddress;
420 __u8 bmAttributes;
421 __le16 wMaxPacketSize;
422 __u8 bInterval;
423
424 /* NOTE: these two are _only_ in audio endpoints. */
425 /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
426 __u8 bRefresh;
427 __u8 bSynchAddress;
428} __attribute__ ((packed));
429
430#define USB_DT_ENDPOINT_SIZE 7
431#define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
432
433
434/*
435 * Endpoints
436 */
437#define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */
438#define USB_ENDPOINT_DIR_MASK 0x80
439
440#define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */
441#define USB_ENDPOINT_XFER_CONTROL 0
442#define USB_ENDPOINT_XFER_ISOC 1
443#define USB_ENDPOINT_XFER_BULK 2
444#define USB_ENDPOINT_XFER_INT 3
445#define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
446
447#define USB_ENDPOINT_MAXP_MASK 0x07ff
448#define USB_EP_MAXP_MULT_SHIFT 11
449#define USB_EP_MAXP_MULT_MASK (3 << USB_EP_MAXP_MULT_SHIFT)
450#define USB_EP_MAXP_MULT(m) \
451 (((m) & USB_EP_MAXP_MULT_MASK) >> USB_EP_MAXP_MULT_SHIFT)
452
453/* The USB 3.0 spec redefines bits 5:4 of bmAttributes as interrupt ep type. */
454#define USB_ENDPOINT_INTRTYPE 0x30
455#define USB_ENDPOINT_INTR_PERIODIC (0 << 4)
456#define USB_ENDPOINT_INTR_NOTIFICATION (1 << 4)
457
458#define USB_ENDPOINT_SYNCTYPE 0x0c
459#define USB_ENDPOINT_SYNC_NONE (0 << 2)
460#define USB_ENDPOINT_SYNC_ASYNC (1 << 2)
461#define USB_ENDPOINT_SYNC_ADAPTIVE (2 << 2)
462#define USB_ENDPOINT_SYNC_SYNC (3 << 2)
463
464#define USB_ENDPOINT_USAGE_MASK 0x30
465#define USB_ENDPOINT_USAGE_DATA 0x00
466#define USB_ENDPOINT_USAGE_FEEDBACK 0x10
467#define USB_ENDPOINT_USAGE_IMPLICIT_FB 0x20 /* Implicit feedback Data endpoint */
468
469/*-------------------------------------------------------------------------*/
470
471/**
472 * usb_endpoint_num - get the endpoint's number
473 * @epd: endpoint to be checked
474 *
475 * Returns @epd's number: 0 to 15.
476 */
477static __inline__ int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
478{
479 return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
480}
481
482/**
483 * usb_endpoint_type - get the endpoint's transfer type
484 * @epd: endpoint to be checked
485 *
486 * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
487 * to @epd's transfer type.
488 */
489static __inline__ int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
490{
491 return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
492}
493
494/**
495 * usb_endpoint_dir_in - check if the endpoint has IN direction
496 * @epd: endpoint to be checked
497 *
498 * Returns true if the endpoint is of type IN, otherwise it returns false.
499 */
500static __inline__ int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
501{
502 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN);
503}
504
505/**
506 * usb_endpoint_dir_out - check if the endpoint has OUT direction
507 * @epd: endpoint to be checked
508 *
509 * Returns true if the endpoint is of type OUT, otherwise it returns false.
510 */
511static __inline__ int usb_endpoint_dir_out(
512 const struct usb_endpoint_descriptor *epd)
513{
514 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT);
515}
516
517/**
518 * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type
519 * @epd: endpoint to be checked
520 *
521 * Returns true if the endpoint is of type bulk, otherwise it returns false.
522 */
523static __inline__ int usb_endpoint_xfer_bulk(
524 const struct usb_endpoint_descriptor *epd)
525{
526 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
527 USB_ENDPOINT_XFER_BULK);
528}
529
530/**
531 * usb_endpoint_xfer_control - check if the endpoint has control transfer type
532 * @epd: endpoint to be checked
533 *
534 * Returns true if the endpoint is of type control, otherwise it returns false.
535 */
536static __inline__ int usb_endpoint_xfer_control(
537 const struct usb_endpoint_descriptor *epd)
538{
539 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
540 USB_ENDPOINT_XFER_CONTROL);
541}
542
543/**
544 * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type
545 * @epd: endpoint to be checked
546 *
547 * Returns true if the endpoint is of type interrupt, otherwise it returns
548 * false.
549 */
550static __inline__ int usb_endpoint_xfer_int(
551 const struct usb_endpoint_descriptor *epd)
552{
553 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
554 USB_ENDPOINT_XFER_INT);
555}
556
557/**
558 * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type
559 * @epd: endpoint to be checked
560 *
561 * Returns true if the endpoint is of type isochronous, otherwise it returns
562 * false.
563 */
564static __inline__ int usb_endpoint_xfer_isoc(
565 const struct usb_endpoint_descriptor *epd)
566{
567 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
568 USB_ENDPOINT_XFER_ISOC);
569}
570
571/**
572 * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN
573 * @epd: endpoint to be checked
574 *
575 * Returns true if the endpoint has bulk transfer type and IN direction,
576 * otherwise it returns false.
577 */
578static __inline__ int usb_endpoint_is_bulk_in(
579 const struct usb_endpoint_descriptor *epd)
580{
581 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd);
582}
583
584/**
585 * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT
586 * @epd: endpoint to be checked
587 *
588 * Returns true if the endpoint has bulk transfer type and OUT direction,
589 * otherwise it returns false.
590 */
591static __inline__ int usb_endpoint_is_bulk_out(
592 const struct usb_endpoint_descriptor *epd)
593{
594 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd);
595}
596
597/**
598 * usb_endpoint_is_int_in - check if the endpoint is interrupt IN
599 * @epd: endpoint to be checked
600 *
601 * Returns true if the endpoint has interrupt transfer type and IN direction,
602 * otherwise it returns false.
603 */
604static __inline__ int usb_endpoint_is_int_in(
605 const struct usb_endpoint_descriptor *epd)
606{
607 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd);
608}
609
610/**
611 * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT
612 * @epd: endpoint to be checked
613 *
614 * Returns true if the endpoint has interrupt transfer type and OUT direction,
615 * otherwise it returns false.
616 */
617static __inline__ int usb_endpoint_is_int_out(
618 const struct usb_endpoint_descriptor *epd)
619{
620 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd);
621}
622
623/**
624 * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN
625 * @epd: endpoint to be checked
626 *
627 * Returns true if the endpoint has isochronous transfer type and IN direction,
628 * otherwise it returns false.
629 */
630static __inline__ int usb_endpoint_is_isoc_in(
631 const struct usb_endpoint_descriptor *epd)
632{
633 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd);
634}
635
636/**
637 * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT
638 * @epd: endpoint to be checked
639 *
640 * Returns true if the endpoint has isochronous transfer type and OUT direction,
641 * otherwise it returns false.
642 */
643static __inline__ int usb_endpoint_is_isoc_out(
644 const struct usb_endpoint_descriptor *epd)
645{
646 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd);
647}
648
649/**
650 * usb_endpoint_maxp - get endpoint's max packet size
651 * @epd: endpoint to be checked
652 *
653 * Returns @epd's max packet bits [10:0]
654 */
655static __inline__ int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd)
656{
657 return __le16_to_cpu(epd->wMaxPacketSize) & USB_ENDPOINT_MAXP_MASK;
658}
659
660/**
661 * usb_endpoint_maxp_mult - get endpoint's transactional opportunities
662 * @epd: endpoint to be checked
663 *
664 * Return @epd's wMaxPacketSize[12:11] + 1
665 */
666static __inline__ int
667usb_endpoint_maxp_mult(const struct usb_endpoint_descriptor *epd)
668{
669 int maxp = __le16_to_cpu(epd->wMaxPacketSize);
670
671 return USB_EP_MAXP_MULT(maxp) + 1;
672}
673
674static __inline__ int usb_endpoint_interrupt_type(
675 const struct usb_endpoint_descriptor *epd)
676{
677 return epd->bmAttributes & USB_ENDPOINT_INTRTYPE;
678}
679
680/*-------------------------------------------------------------------------*/
681
682/* USB_DT_EUSB2_ISOC_ENDPOINT_COMP: eUSB2 Isoch Endpoint Companion descriptor */
683struct usb_eusb2_isoc_ep_comp_descriptor {
684 __u8 bLength;
685 __u8 bDescriptorType;
686 __le16 wMaxPacketSize;
687 __le32 dwBytesPerInterval;
688} __attribute__ ((packed));
689
690#define USB_DT_EUSB2_ISOC_EP_COMP_SIZE 8
691
692/*-------------------------------------------------------------------------*/
693
694/* USB_DT_SSP_ISOC_ENDPOINT_COMP: SuperSpeedPlus Isochronous Endpoint Companion
695 * descriptor
696 */
697struct usb_ssp_isoc_ep_comp_descriptor {
698 __u8 bLength;
699 __u8 bDescriptorType;
700 __le16 wReseved;
701 __le32 dwBytesPerInterval;
702} __attribute__ ((packed));
703
704#define USB_DT_SSP_ISOC_EP_COMP_SIZE 8
705
706/*-------------------------------------------------------------------------*/
707
708/* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
709struct usb_ss_ep_comp_descriptor {
710 __u8 bLength;
711 __u8 bDescriptorType;
712
713 __u8 bMaxBurst;
714 __u8 bmAttributes;
715 __le16 wBytesPerInterval;
716} __attribute__ ((packed));
717
718#define USB_DT_SS_EP_COMP_SIZE 6
719
720/* Bits 4:0 of bmAttributes if this is a bulk endpoint */
721static __inline__ int
722usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp)
723{
724 int max_streams;
725
726 if (!comp)
727 return 0;
728
729 max_streams = comp->bmAttributes & 0x1f;
730
731 if (!max_streams)
732 return 0;
733
734 max_streams = 1 << max_streams;
735
736 return max_streams;
737}
738
739/* Bits 1:0 of bmAttributes if this is an isoc endpoint */
740#define USB_SS_MULT(p) (1 + ((p) & 0x3))
741/* Bit 7 of bmAttributes if a SSP isoc endpoint companion descriptor exists */
742#define USB_SS_SSP_ISOC_COMP(p) ((p) & (1 << 7))
743
744/*-------------------------------------------------------------------------*/
745
746/* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
747struct usb_qualifier_descriptor {
748 __u8 bLength;
749 __u8 bDescriptorType;
750
751 __le16 bcdUSB;
752 __u8 bDeviceClass;
753 __u8 bDeviceSubClass;
754 __u8 bDeviceProtocol;
755 __u8 bMaxPacketSize0;
756 __u8 bNumConfigurations;
757 __u8 bRESERVED;
758} __attribute__ ((packed));
759
760
761/*-------------------------------------------------------------------------*/
762
763/* USB_DT_OTG (from OTG 1.0a supplement) */
764struct usb_otg_descriptor {
765 __u8 bLength;
766 __u8 bDescriptorType;
767
768 __u8 bmAttributes; /* support for HNP, SRP, etc */
769} __attribute__ ((packed));
770
771/* USB_DT_OTG (from OTG 2.0 supplement) */
772struct usb_otg20_descriptor {
773 __u8 bLength;
774 __u8 bDescriptorType;
775
776 __u8 bmAttributes; /* support for HNP, SRP and ADP, etc */
777 __le16 bcdOTG; /* OTG and EH supplement release number
778 * in binary-coded decimal(i.e. 2.0 is 0200H)
779 */
780} __attribute__ ((packed));
781
782/* from usb_otg_descriptor.bmAttributes */
783#define USB_OTG_SRP (1 << 0)
784#define USB_OTG_HNP (1 << 1) /* swap host/device roles */
785#define USB_OTG_ADP (1 << 2) /* support ADP */
786/* OTG 3.0 */
787#define USB_OTG_RSP (1 << 3) /* support RSP */
788
789#define OTG_STS_SELECTOR 0xF000 /* OTG status selector */
790/*-------------------------------------------------------------------------*/
791
792/* USB_DT_DEBUG: for special highspeed devices, replacing serial console */
793struct usb_debug_descriptor {
794 __u8 bLength;
795 __u8 bDescriptorType;
796
797 /* bulk endpoints with 8 byte maxpacket */
798 __u8 bDebugInEndpoint;
799 __u8 bDebugOutEndpoint;
800} __attribute__((packed));
801
802/*-------------------------------------------------------------------------*/
803
804/* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
805struct usb_interface_assoc_descriptor {
806 __u8 bLength;
807 __u8 bDescriptorType;
808
809 __u8 bFirstInterface;
810 __u8 bInterfaceCount;
811 __u8 bFunctionClass;
812 __u8 bFunctionSubClass;
813 __u8 bFunctionProtocol;
814 __u8 iFunction;
815} __attribute__ ((packed));
816
817#define USB_DT_INTERFACE_ASSOCIATION_SIZE 8
818
819/*-------------------------------------------------------------------------*/
820
821/* USB_DT_SECURITY: group of wireless security descriptors, including
822 * encryption types available for setting up a CC/association.
823 */
824struct usb_security_descriptor {
825 __u8 bLength;
826 __u8 bDescriptorType;
827
828 __le16 wTotalLength;
829 __u8 bNumEncryptionTypes;
830} __attribute__((packed));
831
832/*-------------------------------------------------------------------------*/
833
834/* USB_DT_KEY: used with {GET,SET}_SECURITY_DATA; only public keys
835 * may be retrieved.
836 */
837struct usb_key_descriptor {
838 __u8 bLength;
839 __u8 bDescriptorType;
840
841 __u8 tTKID[3];
842 __u8 bReserved;
843 __u8 bKeyData[];
844} __attribute__((packed));
845
846/*-------------------------------------------------------------------------*/
847
848/* USB_DT_ENCRYPTION_TYPE: bundled in DT_SECURITY groups */
849struct usb_encryption_descriptor {
850 __u8 bLength;
851 __u8 bDescriptorType;
852
853 __u8 bEncryptionType;
854#define USB_ENC_TYPE_UNSECURE 0
855#define USB_ENC_TYPE_WIRED 1 /* non-wireless mode */
856#define USB_ENC_TYPE_CCM_1 2 /* aes128/cbc session */
857#define USB_ENC_TYPE_RSA_1 3 /* rsa3072/sha1 auth */
858 __u8 bEncryptionValue; /* use in SET_ENCRYPTION */
859 __u8 bAuthKeyIndex;
860} __attribute__((packed));
861
862
863/*-------------------------------------------------------------------------*/
864
865/* USB_DT_BOS: group of device-level capabilities */
866struct usb_bos_descriptor {
867 __u8 bLength;
868 __u8 bDescriptorType;
869
870 __le16 wTotalLength;
871 __u8 bNumDeviceCaps;
872} __attribute__((packed));
873
874#define USB_DT_BOS_SIZE 5
875/*-------------------------------------------------------------------------*/
876
877/* USB_DT_DEVICE_CAPABILITY: grouped with BOS */
878struct usb_dev_cap_header {
879 __u8 bLength;
880 __u8 bDescriptorType;
881 __u8 bDevCapabilityType;
882} __attribute__((packed));
883
884#define USB_CAP_TYPE_WIRELESS_USB 1
885
886struct usb_wireless_cap_descriptor { /* Ultra Wide Band */
887 __u8 bLength;
888 __u8 bDescriptorType;
889 __u8 bDevCapabilityType;
890
891 __u8 bmAttributes;
892#define USB_WIRELESS_P2P_DRD (1 << 1)
893#define USB_WIRELESS_BEACON_MASK (3 << 2)
894#define USB_WIRELESS_BEACON_SELF (1 << 2)
895#define USB_WIRELESS_BEACON_DIRECTED (2 << 2)
896#define USB_WIRELESS_BEACON_NONE (3 << 2)
897 __le16 wPHYRates; /* bit rates, Mbps */
898#define USB_WIRELESS_PHY_53 (1 << 0) /* always set */
899#define USB_WIRELESS_PHY_80 (1 << 1)
900#define USB_WIRELESS_PHY_107 (1 << 2) /* always set */
901#define USB_WIRELESS_PHY_160 (1 << 3)
902#define USB_WIRELESS_PHY_200 (1 << 4) /* always set */
903#define USB_WIRELESS_PHY_320 (1 << 5)
904#define USB_WIRELESS_PHY_400 (1 << 6)
905#define USB_WIRELESS_PHY_480 (1 << 7)
906 __u8 bmTFITXPowerInfo; /* TFI power levels */
907 __u8 bmFFITXPowerInfo; /* FFI power levels */
908 __le16 bmBandGroup;
909 __u8 bReserved;
910} __attribute__((packed));
911
912#define USB_DT_USB_WIRELESS_CAP_SIZE 11
913
914/* USB 2.0 Extension descriptor */
915#define USB_CAP_TYPE_EXT 2
916
917struct usb_ext_cap_descriptor { /* Link Power Management */
918 __u8 bLength;
919 __u8 bDescriptorType;
920 __u8 bDevCapabilityType;
921 __le32 bmAttributes;
922#define USB_LPM_SUPPORT (1 << 1) /* supports LPM */
923#define USB_BESL_SUPPORT (1 << 2) /* supports BESL */
924#define USB_BESL_BASELINE_VALID (1 << 3) /* Baseline BESL valid*/
925#define USB_BESL_DEEP_VALID (1 << 4) /* Deep BESL valid */
926#define USB_SET_BESL_BASELINE(p) (((p) & 0xf) << 8)
927#define USB_SET_BESL_DEEP(p) (((p) & 0xf) << 12)
928#define USB_GET_BESL_BASELINE(p) (((p) & (0xf << 8)) >> 8)
929#define USB_GET_BESL_DEEP(p) (((p) & (0xf << 12)) >> 12)
930} __attribute__((packed));
931
932#define USB_DT_USB_EXT_CAP_SIZE 7
933
934/*
935 * SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB
936 * specific device level capabilities
937 */
938#define USB_SS_CAP_TYPE 3
939struct usb_ss_cap_descriptor { /* Link Power Management */
940 __u8 bLength;
941 __u8 bDescriptorType;
942 __u8 bDevCapabilityType;
943 __u8 bmAttributes;
944#define USB_LTM_SUPPORT (1 << 1) /* supports LTM */
945 __le16 wSpeedSupported;
946#define USB_LOW_SPEED_OPERATION (1) /* Low speed operation */
947#define USB_FULL_SPEED_OPERATION (1 << 1) /* Full speed operation */
948#define USB_HIGH_SPEED_OPERATION (1 << 2) /* High speed operation */
949#define USB_5GBPS_OPERATION (1 << 3) /* Operation at 5Gbps */
950 __u8 bFunctionalitySupport;
951 __u8 bU1devExitLat;
952 __le16 bU2DevExitLat;
953} __attribute__((packed));
954
955#define USB_DT_USB_SS_CAP_SIZE 10
956
957/*
958 * Container ID Capability descriptor: Defines the instance unique ID used to
959 * identify the instance across all operating modes
960 */
961#define CONTAINER_ID_TYPE 4
962struct usb_ss_container_id_descriptor {
963 __u8 bLength;
964 __u8 bDescriptorType;
965 __u8 bDevCapabilityType;
966 __u8 bReserved;
967 __u8 ContainerID[16]; /* 128-bit number */
968} __attribute__((packed));
969
970#define USB_DT_USB_SS_CONTN_ID_SIZE 20
971
972/*
973 * Platform Device Capability descriptor: Defines platform specific device
974 * capabilities
975 */
976#define USB_PLAT_DEV_CAP_TYPE 5
977struct usb_plat_dev_cap_descriptor {
978 __u8 bLength;
979 __u8 bDescriptorType;
980 __u8 bDevCapabilityType;
981 __u8 bReserved;
982 __u8 UUID[16];
983 __u8 CapabilityData[];
984} __attribute__((packed));
985
986#define USB_DT_USB_PLAT_DEV_CAP_SIZE(capability_data_size) (20 + capability_data_size)
987
988/*
989 * SuperSpeed Plus USB Capability descriptor: Defines the set of
990 * SuperSpeed Plus USB specific device level capabilities
991 */
992#define USB_SSP_CAP_TYPE 0xa
993struct usb_ssp_cap_descriptor {
994 __u8 bLength;
995 __u8 bDescriptorType;
996 __u8 bDevCapabilityType;
997 __u8 bReserved;
998 __le32 bmAttributes;
999#define USB_SSP_SUBLINK_SPEED_ATTRIBS (0x1f << 0) /* sublink speed entries */
1000#define USB_SSP_SUBLINK_SPEED_IDS (0xf << 5) /* speed ID entries */
1001 __le16 wFunctionalitySupport;
1002#define USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID (0xf)
1003#define USB_SSP_MIN_RX_LANE_COUNT (0xf << 8)
1004#define USB_SSP_MIN_TX_LANE_COUNT (0xf << 12)
1005 __le16 wReserved;
1006 union {
1007 __le32 legacy_padding;
1008 /* list of sublink speed attrib entries */
1009 __DECLARE_FLEX_ARRAY(__le32, bmSublinkSpeedAttr);
1010 };
1011#define USB_SSP_SUBLINK_SPEED_SSID (0xf) /* sublink speed ID */
1012#define USB_SSP_SUBLINK_SPEED_LSE (0x3 << 4) /* Lanespeed exponent */
1013#define USB_SSP_SUBLINK_SPEED_LSE_BPS 0
1014#define USB_SSP_SUBLINK_SPEED_LSE_KBPS 1
1015#define USB_SSP_SUBLINK_SPEED_LSE_MBPS 2
1016#define USB_SSP_SUBLINK_SPEED_LSE_GBPS 3
1017
1018#define USB_SSP_SUBLINK_SPEED_ST (0x3 << 6) /* Sublink type */
1019#define USB_SSP_SUBLINK_SPEED_ST_SYM_RX 0
1020#define USB_SSP_SUBLINK_SPEED_ST_ASYM_RX 1
1021#define USB_SSP_SUBLINK_SPEED_ST_SYM_TX 2
1022#define USB_SSP_SUBLINK_SPEED_ST_ASYM_TX 3
1023
1024#define USB_SSP_SUBLINK_SPEED_RSVD (0x3f << 8) /* Reserved */
1025#define USB_SSP_SUBLINK_SPEED_LP (0x3 << 14) /* Link protocol */
1026#define USB_SSP_SUBLINK_SPEED_LP_SS 0
1027#define USB_SSP_SUBLINK_SPEED_LP_SSP 1
1028
1029#define USB_SSP_SUBLINK_SPEED_LSM (0xff << 16) /* Lanespeed mantissa */
1030} __attribute__((packed));
1031
1032/*
1033 * USB Power Delivery Capability Descriptor:
1034 * Defines capabilities for PD
1035 */
1036/* Defines the various PD Capabilities of this device */
1037#define USB_PD_POWER_DELIVERY_CAPABILITY 0x06
1038/* Provides information on each battery supported by the device */
1039#define USB_PD_BATTERY_INFO_CAPABILITY 0x07
1040/* The Consumer characteristics of a Port on the device */
1041#define USB_PD_PD_CONSUMER_PORT_CAPABILITY 0x08
1042/* The provider characteristics of a Port on the device */
1043#define USB_PD_PD_PROVIDER_PORT_CAPABILITY 0x09
1044
1045struct usb_pd_cap_descriptor {
1046 __u8 bLength;
1047 __u8 bDescriptorType;
1048 __u8 bDevCapabilityType; /* set to USB_PD_POWER_DELIVERY_CAPABILITY */
1049 __u8 bReserved;
1050 __le32 bmAttributes;
1051#define USB_PD_CAP_BATTERY_CHARGING (1 << 1) /* supports Battery Charging specification */
1052#define USB_PD_CAP_USB_PD (1 << 2) /* supports USB Power Delivery specification */
1053#define USB_PD_CAP_PROVIDER (1 << 3) /* can provide power */
1054#define USB_PD_CAP_CONSUMER (1 << 4) /* can consume power */
1055#define USB_PD_CAP_CHARGING_POLICY (1 << 5) /* supports CHARGING_POLICY feature */
1056#define USB_PD_CAP_TYPE_C_CURRENT (1 << 6) /* supports power capabilities defined in the USB Type-C Specification */
1057
1058#define USB_PD_CAP_PWR_AC (1 << 8)
1059#define USB_PD_CAP_PWR_BAT (1 << 9)
1060#define USB_PD_CAP_PWR_USE_V_BUS (1 << 14)
1061
1062 __le16 bmProviderPorts; /* Bit zero refers to the UFP of the device */
1063 __le16 bmConsumerPorts;
1064 __le16 bcdBCVersion;
1065 __le16 bcdPDVersion;
1066 __le16 bcdUSBTypeCVersion;
1067} __attribute__((packed));
1068
1069struct usb_pd_cap_battery_info_descriptor {
1070 __u8 bLength;
1071 __u8 bDescriptorType;
1072 __u8 bDevCapabilityType;
1073 /* Index of string descriptor shall contain the user friendly name for this battery */
1074 __u8 iBattery;
1075 /* Index of string descriptor shall contain the Serial Number String for this battery */
1076 __u8 iSerial;
1077 __u8 iManufacturer;
1078 __u8 bBatteryId; /* uniquely identifies this battery in status Messages */
1079 __u8 bReserved;
1080 /*
1081 * Shall contain the Battery Charge value above which this
1082 * battery is considered to be fully charged but not necessarily
1083 * “topped off.”
1084 */
1085 __le32 dwChargedThreshold; /* in mWh */
1086 /*
1087 * Shall contain the minimum charge level of this battery such
1088 * that above this threshold, a device can be assured of being
1089 * able to power up successfully (see Battery Charging 1.2).
1090 */
1091 __le32 dwWeakThreshold; /* in mWh */
1092 __le32 dwBatteryDesignCapacity; /* in mWh */
1093 __le32 dwBatteryLastFullchargeCapacity; /* in mWh */
1094} __attribute__((packed));
1095
1096struct usb_pd_cap_consumer_port_descriptor {
1097 __u8 bLength;
1098 __u8 bDescriptorType;
1099 __u8 bDevCapabilityType;
1100 __u8 bReserved;
1101 __u8 bmCapabilities;
1102/* port will oerate under: */
1103#define USB_PD_CAP_CONSUMER_BC (1 << 0) /* BC */
1104#define USB_PD_CAP_CONSUMER_PD (1 << 1) /* PD */
1105#define USB_PD_CAP_CONSUMER_TYPE_C (1 << 2) /* USB Type-C Current */
1106 __le16 wMinVoltage; /* in 50mV units */
1107 __le16 wMaxVoltage; /* in 50mV units */
1108 __u16 wReserved;
1109 __le32 dwMaxOperatingPower; /* in 10 mW - operating at steady state */
1110 __le32 dwMaxPeakPower; /* in 10mW units - operating at peak power */
1111 __le32 dwMaxPeakPowerTime; /* in 100ms units - duration of peak */
1112#define USB_PD_CAP_CONSUMER_UNKNOWN_PEAK_POWER_TIME 0xffff
1113} __attribute__((packed));
1114
1115struct usb_pd_cap_provider_port_descriptor {
1116 __u8 bLength;
1117 __u8 bDescriptorType;
1118 __u8 bDevCapabilityType;
1119 __u8 bReserved1;
1120 __u8 bmCapabilities;
1121/* port will oerate under: */
1122#define USB_PD_CAP_PROVIDER_BC (1 << 0) /* BC */
1123#define USB_PD_CAP_PROVIDER_PD (1 << 1) /* PD */
1124#define USB_PD_CAP_PROVIDER_TYPE_C (1 << 2) /* USB Type-C Current */
1125 __u8 bNumOfPDObjects;
1126 __u8 bReserved2;
1127 __le32 wPowerDataObject[];
1128} __attribute__((packed));
1129
1130/*
1131 * Precision time measurement capability descriptor: advertised by devices and
1132 * hubs that support PTM
1133 */
1134#define USB_PTM_CAP_TYPE 0xb
1135struct usb_ptm_cap_descriptor {
1136 __u8 bLength;
1137 __u8 bDescriptorType;
1138 __u8 bDevCapabilityType;
1139} __attribute__((packed));
1140
1141#define USB_DT_USB_PTM_ID_SIZE 3
1142/*
1143 * The size of the descriptor for the Sublink Speed Attribute Count
1144 * (SSAC) specified in bmAttributes[4:0]. SSAC is zero-based
1145 */
1146#define USB_DT_USB_SSP_CAP_SIZE(ssac) (12 + (ssac + 1) * 4)
1147
1148/*-------------------------------------------------------------------------*/
1149
1150/* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with
1151 * each endpoint descriptor for a wireless device
1152 */
1153struct usb_wireless_ep_comp_descriptor {
1154 __u8 bLength;
1155 __u8 bDescriptorType;
1156
1157 __u8 bMaxBurst;
1158 __u8 bMaxSequence;
1159 __le16 wMaxStreamDelay;
1160 __le16 wOverTheAirPacketSize;
1161 __u8 bOverTheAirInterval;
1162 __u8 bmCompAttributes;
1163#define USB_ENDPOINT_SWITCH_MASK 0x03 /* in bmCompAttributes */
1164#define USB_ENDPOINT_SWITCH_NO 0
1165#define USB_ENDPOINT_SWITCH_SWITCH 1
1166#define USB_ENDPOINT_SWITCH_SCALE 2
1167} __attribute__((packed));
1168
1169/*-------------------------------------------------------------------------*/
1170
1171/* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
1172 * host and a device for connection set up, mutual authentication, and
1173 * exchanging short lived session keys. The handshake depends on a CC.
1174 */
1175struct usb_handshake {
1176 __u8 bMessageNumber;
1177 __u8 bStatus;
1178 __u8 tTKID[3];
1179 __u8 bReserved;
1180 __u8 CDID[16];
1181 __u8 nonce[16];
1182 __u8 MIC[8];
1183} __attribute__((packed));
1184
1185/*-------------------------------------------------------------------------*/
1186
1187/* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
1188 * A CC may also be set up using non-wireless secure channels (including
1189 * wired USB!), and some devices may support CCs with multiple hosts.
1190 */
1191struct usb_connection_context {
1192 __u8 CHID[16]; /* persistent host id */
1193 __u8 CDID[16]; /* device id (unique w/in host context) */
1194 __u8 CK[16]; /* connection key */
1195} __attribute__((packed));
1196
1197/*-------------------------------------------------------------------------*/
1198
1199/* USB 2.0 defines three speeds, here's how Linux identifies them */
1200
1201enum usb_device_speed {
1202 USB_SPEED_UNKNOWN = 0, /* enumerating */
1203 USB_SPEED_LOW, USB_SPEED_FULL, /* usb 1.1 */
1204 USB_SPEED_HIGH, /* usb 2.0 */
1205 USB_SPEED_WIRELESS, /* wireless (usb 2.5) */
1206 USB_SPEED_SUPER, /* usb 3.0 */
1207 USB_SPEED_SUPER_PLUS, /* usb 3.1 */
1208};
1209
1210
1211enum usb_device_state {
1212 /* NOTATTACHED isn't in the USB spec, and this state acts
1213 * the same as ATTACHED ... but it's clearer this way.
1214 */
1215 USB_STATE_NOTATTACHED = 0,
1216
1217 /* chapter 9 and authentication (wireless) device states */
1218 USB_STATE_ATTACHED,
1219 USB_STATE_POWERED, /* wired */
1220 USB_STATE_RECONNECTING, /* auth */
1221 USB_STATE_UNAUTHENTICATED, /* auth */
1222 USB_STATE_DEFAULT, /* limited function */
1223 USB_STATE_ADDRESS,
1224 USB_STATE_CONFIGURED, /* most functions */
1225
1226 USB_STATE_SUSPENDED
1227
1228 /* NOTE: there are actually four different SUSPENDED
1229 * states, returning to POWERED, DEFAULT, ADDRESS, or
1230 * CONFIGURED respectively when SOF tokens flow again.
1231 * At this level there's no difference between L1 and L2
1232 * suspend states. (L2 being original USB 1.1 suspend.)
1233 */
1234};
1235
1236enum usb3_link_state {
1237 USB3_LPM_U0 = 0,
1238 USB3_LPM_U1,
1239 USB3_LPM_U2,
1240 USB3_LPM_U3
1241};
1242
1243/*
1244 * A U1 timeout of 0x0 means the parent hub will reject any transitions to U1.
1245 * 0xff means the parent hub will accept transitions to U1, but will not
1246 * initiate a transition.
1247 *
1248 * A U1 timeout of 0x1 to 0x7F also causes the hub to initiate a transition to
1249 * U1 after that many microseconds. Timeouts of 0x80 to 0xFE are reserved
1250 * values.
1251 *
1252 * A U2 timeout of 0x0 means the parent hub will reject any transitions to U2.
1253 * 0xff means the parent hub will accept transitions to U2, but will not
1254 * initiate a transition.
1255 *
1256 * A U2 timeout of 0x1 to 0xFE also causes the hub to initiate a transition to
1257 * U2 after N*256 microseconds. Therefore a U2 timeout value of 0x1 means a U2
1258 * idle timer of 256 microseconds, 0x2 means 512 microseconds, 0xFE means
1259 * 65.024ms.
1260 */
1261#define USB3_LPM_DISABLED 0x0
1262#define USB3_LPM_U1_MAX_TIMEOUT 0x7F
1263#define USB3_LPM_U2_MAX_TIMEOUT 0xFE
1264#define USB3_LPM_DEVICE_INITIATED 0xFF
1265
1266struct usb_set_sel_req {
1267 __u8 u1_sel;
1268 __u8 u1_pel;
1269 __le16 u2_sel;
1270 __le16 u2_pel;
1271} __attribute__ ((packed));
1272
1273/*
1274 * The Set System Exit Latency control transfer provides one byte each for
1275 * U1 SEL and U1 PEL, so the max exit latency is 0xFF. U2 SEL and U2 PEL each
1276 * are two bytes long.
1277 */
1278#define USB3_LPM_MAX_U1_SEL_PEL 0xFF
1279#define USB3_LPM_MAX_U2_SEL_PEL 0xFFFF
1280
1281/*-------------------------------------------------------------------------*/
1282
1283/*
1284 * As per USB compliance update, a device that is actively drawing
1285 * more than 100mA from USB must report itself as bus-powered in
1286 * the GetStatus(DEVICE) call.
1287 * https://compliance.usb.org/index.asp?UpdateFile=Electrical&Format=Standard#34
1288 */
1289#define USB_SELF_POWER_VBUS_MAX_DRAW 100
1290
1291#endif /* __LINUX_USB_CH9_H */