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
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.
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.
16 * There's also "Wireless USB", using low power short range radios for
17 * peripheral interconnection but otherwise building on the USB framework.
19 * Note all descriptors are declared '__attribute__((packed))' so that:
21 * [a] they never get padded, either internally (USB spec writers
22 * probably handled that) or externally;
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
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.
33 #ifndef __LINUX_USB_CH9_H
34 #define __LINUX_USB_CH9_H
36 #include <linux/types.h> /* __u8 etc */
37 #include <asm/byteorder.h> /* le16_to_cpu */
39 /*-------------------------------------------------------------------------*/
41 /* CONTROL REQUEST SUPPORT */
46 * This bit flag is used in endpoint descriptors' bEndpointAddress field.
47 * It's also one of three fields in control requests bRequestType.
49 #define USB_DIR_OUT 0 /* to device */
50 #define USB_DIR_IN 0x80 /* to host */
53 * USB types, the second of three bRequestType fields
55 #define USB_TYPE_MASK (0x03 << 5)
56 #define USB_TYPE_STANDARD (0x00 << 5)
57 #define USB_TYPE_CLASS (0x01 << 5)
58 #define USB_TYPE_VENDOR (0x02 << 5)
59 #define USB_TYPE_RESERVED (0x03 << 5)
62 * USB recipients, the third of three bRequestType fields
64 #define USB_RECIP_MASK 0x1f
65 #define USB_RECIP_DEVICE 0x00
66 #define USB_RECIP_INTERFACE 0x01
67 #define USB_RECIP_ENDPOINT 0x02
68 #define USB_RECIP_OTHER 0x03
69 /* From Wireless USB 1.0 */
70 #define USB_RECIP_PORT 0x04
71 #define USB_RECIP_RPIPE 0x05
74 * Standard requests, for the bRequest field of a SETUP packet.
76 * These are qualified by the bRequestType field, so that for example
77 * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
78 * by a GET_STATUS request.
80 #define USB_REQ_GET_STATUS 0x00
81 #define USB_REQ_CLEAR_FEATURE 0x01
82 #define USB_REQ_SET_FEATURE 0x03
83 #define USB_REQ_SET_ADDRESS 0x05
84 #define USB_REQ_GET_DESCRIPTOR 0x06
85 #define USB_REQ_SET_DESCRIPTOR 0x07
86 #define USB_REQ_GET_CONFIGURATION 0x08
87 #define USB_REQ_SET_CONFIGURATION 0x09
88 #define USB_REQ_GET_INTERFACE 0x0A
89 #define USB_REQ_SET_INTERFACE 0x0B
90 #define USB_REQ_SYNCH_FRAME 0x0C
91 #define USB_REQ_SET_SEL 0x30
92 #define USB_REQ_SET_ISOCH_DELAY 0x31
94 #define USB_REQ_SET_ENCRYPTION 0x0D /* Wireless USB */
95 #define USB_REQ_GET_ENCRYPTION 0x0E
96 #define USB_REQ_RPIPE_ABORT 0x0E
97 #define USB_REQ_SET_HANDSHAKE 0x0F
98 #define USB_REQ_RPIPE_RESET 0x0F
99 #define USB_REQ_GET_HANDSHAKE 0x10
100 #define USB_REQ_SET_CONNECTION 0x11
101 #define USB_REQ_SET_SECURITY_DATA 0x12
102 #define USB_REQ_GET_SECURITY_DATA 0x13
103 #define USB_REQ_SET_WUSB_DATA 0x14
104 #define USB_REQ_LOOPBACK_DATA_WRITE 0x15
105 #define USB_REQ_LOOPBACK_DATA_READ 0x16
106 #define USB_REQ_SET_INTERFACE_DS 0x17
108 /* The Link Power Management (LPM) ECN defines USB_REQ_TEST_AND_SET command,
109 * used by hubs to put ports into a new L1 suspend state, except that it
110 * forgot to define its number ...
114 * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
115 * are read as a bit array returned by USB_REQ_GET_STATUS. (So there
116 * are at most sixteen features of each type.) Hubs may also support a
117 * new USB_REQ_TEST_AND_SET_FEATURE to put ports into L1 suspend.
119 #define USB_DEVICE_SELF_POWERED 0 /* (read only) */
120 #define USB_DEVICE_REMOTE_WAKEUP 1 /* dev may initiate wakeup */
121 #define USB_DEVICE_TEST_MODE 2 /* (wired high speed only) */
122 #define USB_DEVICE_BATTERY 2 /* (wireless) */
123 #define USB_DEVICE_B_HNP_ENABLE 3 /* (otg) dev may initiate HNP */
124 #define USB_DEVICE_WUSB_DEVICE 3 /* (wireless)*/
125 #define USB_DEVICE_A_HNP_SUPPORT 4 /* (otg) RH port supports HNP */
126 #define USB_DEVICE_A_ALT_HNP_SUPPORT 5 /* (otg) other RH port does */
127 #define USB_DEVICE_DEBUG_MODE 6 /* (special devices only) */
130 * Test Mode Selectors
131 * See USB 2.0 spec Table 9-7
135 #define TEST_SE0_NAK 3
136 #define TEST_PACKET 4
137 #define TEST_FORCE_EN 5
140 * New Feature Selectors as added by USB 3.0
141 * See USB 3.0 spec Table 9-6
143 #define USB_DEVICE_U1_ENABLE 48 /* dev may initiate U1 transition */
144 #define USB_DEVICE_U2_ENABLE 49 /* dev may initiate U2 transition */
145 #define USB_DEVICE_LTM_ENABLE 50 /* dev may send LTM */
146 #define USB_INTRF_FUNC_SUSPEND 0 /* function suspend */
148 #define USB_INTR_FUNC_SUSPEND_OPT_MASK 0xFF00
150 * Suspend Options, Table 9-7 USB 3.0 spec
152 #define USB_INTRF_FUNC_SUSPEND_LP (1 << (8 + 0))
153 #define USB_INTRF_FUNC_SUSPEND_RW (1 << (8 + 1))
155 #define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */
157 /* Bit array elements as returned by the USB_REQ_GET_STATUS request. */
158 #define USB_DEV_STAT_U1_ENABLED 2 /* transition into U1 state */
159 #define USB_DEV_STAT_U2_ENABLED 3 /* transition into U2 state */
160 #define USB_DEV_STAT_LTM_ENABLED 4 /* Latency tolerance messages */
163 * struct usb_ctrlrequest - SETUP data for a USB device control request
164 * @bRequestType: matches the USB bmRequestType field
165 * @bRequest: matches the USB bRequest field
166 * @wValue: matches the USB wValue field (le16 byte order)
167 * @wIndex: matches the USB wIndex field (le16 byte order)
168 * @wLength: matches the USB wLength field (le16 byte order)
170 * This structure is used to send control requests to a USB device. It matches
171 * the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the
172 * USB spec for a fuller description of the different fields, and what they are
175 * Note that the driver for any interface can issue control requests.
176 * For most devices, interfaces don't coordinate with each other, so
177 * such requests may be made at any time.
179 struct usb_ctrlrequest {
185 } __attribute__ ((packed));
187 /*-------------------------------------------------------------------------*/
190 * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
191 * (rarely) accepted by SET_DESCRIPTOR.
193 * Note that all multi-byte values here are encoded in little endian
194 * byte order "on the wire". Within the kernel and when exposed
195 * through the Linux-USB APIs, they are not converted to cpu byte
196 * order; it is the responsibility of the client code to do this.
197 * The single exception is when device and configuration descriptors (but
198 * not other descriptors) are read from usbfs (i.e. /proc/bus/usb/BBB/DDD);
199 * in this case the fields are converted to host endianness by the kernel.
203 * Descriptor types ... USB 2.0 spec table 9.5
205 #define USB_DT_DEVICE 0x01
206 #define USB_DT_CONFIG 0x02
207 #define USB_DT_STRING 0x03
208 #define USB_DT_INTERFACE 0x04
209 #define USB_DT_ENDPOINT 0x05
210 #define USB_DT_DEVICE_QUALIFIER 0x06
211 #define USB_DT_OTHER_SPEED_CONFIG 0x07
212 #define USB_DT_INTERFACE_POWER 0x08
213 /* these are from a minor usb 2.0 revision (ECN) */
214 #define USB_DT_OTG 0x09
215 #define USB_DT_DEBUG 0x0a
216 #define USB_DT_INTERFACE_ASSOCIATION 0x0b
217 /* these are from the Wireless USB spec */
218 #define USB_DT_SECURITY 0x0c
219 #define USB_DT_KEY 0x0d
220 #define USB_DT_ENCRYPTION_TYPE 0x0e
221 #define USB_DT_BOS 0x0f
222 #define USB_DT_DEVICE_CAPABILITY 0x10
223 #define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
224 #define USB_DT_WIRE_ADAPTER 0x21
225 #define USB_DT_RPIPE 0x22
226 #define USB_DT_CS_RADIO_CONTROL 0x23
227 /* From the T10 UAS specification */
228 #define USB_DT_PIPE_USAGE 0x24
229 /* From the USB 3.0 spec */
230 #define USB_DT_SS_ENDPOINT_COMP 0x30
232 /* Conventional codes for class-specific descriptors. The convention is
233 * defined in the USB "Common Class" Spec (3.11). Individual class specs
234 * are authoritative for their usage, not the "common class" writeup.
236 #define USB_DT_CS_DEVICE (USB_TYPE_CLASS | USB_DT_DEVICE)
237 #define USB_DT_CS_CONFIG (USB_TYPE_CLASS | USB_DT_CONFIG)
238 #define USB_DT_CS_STRING (USB_TYPE_CLASS | USB_DT_STRING)
239 #define USB_DT_CS_INTERFACE (USB_TYPE_CLASS | USB_DT_INTERFACE)
240 #define USB_DT_CS_ENDPOINT (USB_TYPE_CLASS | USB_DT_ENDPOINT)
242 /* All standard descriptors have these 2 fields at the beginning */
243 struct usb_descriptor_header {
245 __u8 bDescriptorType;
246 } __attribute__ ((packed));
249 /*-------------------------------------------------------------------------*/
251 /* USB_DT_DEVICE: Device descriptor */
252 struct usb_device_descriptor {
254 __u8 bDescriptorType;
258 __u8 bDeviceSubClass;
259 __u8 bDeviceProtocol;
260 __u8 bMaxPacketSize0;
267 __u8 bNumConfigurations;
268 } __attribute__ ((packed));
270 #define USB_DT_DEVICE_SIZE 18
274 * Device and/or Interface Class codes
275 * as found in bDeviceClass or bInterfaceClass
276 * and defined by www.usb.org documents
278 #define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
279 #define USB_CLASS_AUDIO 1
280 #define USB_CLASS_COMM 2
281 #define USB_CLASS_HID 3
282 #define USB_CLASS_PHYSICAL 5
283 #define USB_CLASS_STILL_IMAGE 6
284 #define USB_CLASS_PRINTER 7
285 #define USB_CLASS_MASS_STORAGE 8
286 #define USB_CLASS_HUB 9
287 #define USB_CLASS_CDC_DATA 0x0a
288 #define USB_CLASS_CSCID 0x0b /* chip+ smart card */
289 #define USB_CLASS_CONTENT_SEC 0x0d /* content security */
290 #define USB_CLASS_VIDEO 0x0e
291 #define USB_CLASS_WIRELESS_CONTROLLER 0xe0
292 #define USB_CLASS_MISC 0xef
293 #define USB_CLASS_APP_SPEC 0xfe
294 #define USB_CLASS_VENDOR_SPEC 0xff
296 #define USB_SUBCLASS_VENDOR_SPEC 0xff
298 /*-------------------------------------------------------------------------*/
300 /* USB_DT_CONFIG: Configuration descriptor information.
302 * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
303 * descriptor type is different. Highspeed-capable devices can look
304 * different depending on what speed they're currently running. Only
305 * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
308 struct usb_config_descriptor {
310 __u8 bDescriptorType;
314 __u8 bConfigurationValue;
318 } __attribute__ ((packed));
320 #define USB_DT_CONFIG_SIZE 9
322 /* from config descriptor bmAttributes */
323 #define USB_CONFIG_ATT_ONE (1 << 7) /* must be set */
324 #define USB_CONFIG_ATT_SELFPOWER (1 << 6) /* self powered */
325 #define USB_CONFIG_ATT_WAKEUP (1 << 5) /* can wakeup */
326 #define USB_CONFIG_ATT_BATTERY (1 << 4) /* battery powered */
328 /*-------------------------------------------------------------------------*/
330 /* USB_DT_STRING: String descriptor */
331 struct usb_string_descriptor {
333 __u8 bDescriptorType;
335 __le16 wData[1]; /* UTF-16LE encoded */
336 } __attribute__ ((packed));
338 /* note that "string" zero is special, it holds language codes that
339 * the device supports, not Unicode characters.
342 /*-------------------------------------------------------------------------*/
344 /* USB_DT_INTERFACE: Interface descriptor */
345 struct usb_interface_descriptor {
347 __u8 bDescriptorType;
349 __u8 bInterfaceNumber;
350 __u8 bAlternateSetting;
352 __u8 bInterfaceClass;
353 __u8 bInterfaceSubClass;
354 __u8 bInterfaceProtocol;
356 } __attribute__ ((packed));
358 #define USB_DT_INTERFACE_SIZE 9
360 /*-------------------------------------------------------------------------*/
362 /* USB_DT_ENDPOINT: Endpoint descriptor */
363 struct usb_endpoint_descriptor {
365 __u8 bDescriptorType;
367 __u8 bEndpointAddress;
369 __le16 wMaxPacketSize;
372 /* NOTE: these two are _only_ in audio endpoints. */
373 /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
376 } __attribute__ ((packed));
378 #define USB_DT_ENDPOINT_SIZE 7
379 #define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
385 #define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */
386 #define USB_ENDPOINT_DIR_MASK 0x80
388 #define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */
389 #define USB_ENDPOINT_XFER_CONTROL 0
390 #define USB_ENDPOINT_XFER_ISOC 1
391 #define USB_ENDPOINT_XFER_BULK 2
392 #define USB_ENDPOINT_XFER_INT 3
393 #define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
395 /* The USB 3.0 spec redefines bits 5:4 of bmAttributes as interrupt ep type. */
396 #define USB_ENDPOINT_INTRTYPE 0x30
397 #define USB_ENDPOINT_INTR_PERIODIC (0 << 4)
398 #define USB_ENDPOINT_INTR_NOTIFICATION (1 << 4)
400 #define USB_ENDPOINT_SYNCTYPE 0x0c
401 #define USB_ENDPOINT_SYNC_NONE (0 << 2)
402 #define USB_ENDPOINT_SYNC_ASYNC (1 << 2)
403 #define USB_ENDPOINT_SYNC_ADAPTIVE (2 << 2)
404 #define USB_ENDPOINT_SYNC_SYNC (3 << 2)
406 #define USB_ENDPOINT_USAGE_MASK 0x30
407 #define USB_ENDPOINT_USAGE_DATA 0x00
408 #define USB_ENDPOINT_USAGE_FEEDBACK 0x10
409 #define USB_ENDPOINT_USAGE_IMPLICIT_FB 0x20 /* Implicit feedback Data endpoint */
411 /*-------------------------------------------------------------------------*/
414 * usb_endpoint_num - get the endpoint's number
415 * @epd: endpoint to be checked
417 * Returns @epd's number: 0 to 15.
419 static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
421 return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
425 * usb_endpoint_type - get the endpoint's transfer type
426 * @epd: endpoint to be checked
428 * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
429 * to @epd's transfer type.
431 static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
433 return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
437 * usb_endpoint_dir_in - check if the endpoint has IN direction
438 * @epd: endpoint to be checked
440 * Returns true if the endpoint is of type IN, otherwise it returns false.
442 static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
444 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN);
448 * usb_endpoint_dir_out - check if the endpoint has OUT direction
449 * @epd: endpoint to be checked
451 * Returns true if the endpoint is of type OUT, otherwise it returns false.
453 static inline int usb_endpoint_dir_out(
454 const struct usb_endpoint_descriptor *epd)
456 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT);
460 * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type
461 * @epd: endpoint to be checked
463 * Returns true if the endpoint is of type bulk, otherwise it returns false.
465 static inline int usb_endpoint_xfer_bulk(
466 const struct usb_endpoint_descriptor *epd)
468 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
469 USB_ENDPOINT_XFER_BULK);
473 * usb_endpoint_xfer_control - check if the endpoint has control transfer type
474 * @epd: endpoint to be checked
476 * Returns true if the endpoint is of type control, otherwise it returns false.
478 static inline int usb_endpoint_xfer_control(
479 const struct usb_endpoint_descriptor *epd)
481 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
482 USB_ENDPOINT_XFER_CONTROL);
486 * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type
487 * @epd: endpoint to be checked
489 * Returns true if the endpoint is of type interrupt, otherwise it returns
492 static inline int usb_endpoint_xfer_int(
493 const struct usb_endpoint_descriptor *epd)
495 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
496 USB_ENDPOINT_XFER_INT);
500 * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type
501 * @epd: endpoint to be checked
503 * Returns true if the endpoint is of type isochronous, otherwise it returns
506 static inline int usb_endpoint_xfer_isoc(
507 const struct usb_endpoint_descriptor *epd)
509 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
510 USB_ENDPOINT_XFER_ISOC);
514 * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN
515 * @epd: endpoint to be checked
517 * Returns true if the endpoint has bulk transfer type and IN direction,
518 * otherwise it returns false.
520 static inline int usb_endpoint_is_bulk_in(
521 const struct usb_endpoint_descriptor *epd)
523 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd);
527 * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT
528 * @epd: endpoint to be checked
530 * Returns true if the endpoint has bulk transfer type and OUT direction,
531 * otherwise it returns false.
533 static inline int usb_endpoint_is_bulk_out(
534 const struct usb_endpoint_descriptor *epd)
536 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd);
540 * usb_endpoint_is_int_in - check if the endpoint is interrupt IN
541 * @epd: endpoint to be checked
543 * Returns true if the endpoint has interrupt transfer type and IN direction,
544 * otherwise it returns false.
546 static inline int usb_endpoint_is_int_in(
547 const struct usb_endpoint_descriptor *epd)
549 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd);
553 * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT
554 * @epd: endpoint to be checked
556 * Returns true if the endpoint has interrupt transfer type and OUT direction,
557 * otherwise it returns false.
559 static inline int usb_endpoint_is_int_out(
560 const struct usb_endpoint_descriptor *epd)
562 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd);
566 * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN
567 * @epd: endpoint to be checked
569 * Returns true if the endpoint has isochronous transfer type and IN direction,
570 * otherwise it returns false.
572 static inline int usb_endpoint_is_isoc_in(
573 const struct usb_endpoint_descriptor *epd)
575 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd);
579 * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT
580 * @epd: endpoint to be checked
582 * Returns true if the endpoint has isochronous transfer type and OUT direction,
583 * otherwise it returns false.
585 static inline int usb_endpoint_is_isoc_out(
586 const struct usb_endpoint_descriptor *epd)
588 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd);
592 * usb_endpoint_maxp - get endpoint's max packet size
593 * @epd: endpoint to be checked
595 * Returns @epd's max packet
597 static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd)
599 return __le16_to_cpu(epd->wMaxPacketSize);
602 static inline int usb_endpoint_interrupt_type(
603 const struct usb_endpoint_descriptor *epd)
605 return epd->bmAttributes & USB_ENDPOINT_INTRTYPE;
608 /*-------------------------------------------------------------------------*/
610 /* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
611 struct usb_ss_ep_comp_descriptor {
613 __u8 bDescriptorType;
617 __le16 wBytesPerInterval;
618 } __attribute__ ((packed));
620 #define USB_DT_SS_EP_COMP_SIZE 6
622 /* Bits 4:0 of bmAttributes if this is a bulk endpoint */
624 usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp)
631 max_streams = comp->bmAttributes & 0x1f;
636 max_streams = 1 << max_streams;
641 /* Bits 1:0 of bmAttributes if this is an isoc endpoint */
642 #define USB_SS_MULT(p) (1 + ((p) & 0x3))
644 /*-------------------------------------------------------------------------*/
646 /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
647 struct usb_qualifier_descriptor {
649 __u8 bDescriptorType;
653 __u8 bDeviceSubClass;
654 __u8 bDeviceProtocol;
655 __u8 bMaxPacketSize0;
656 __u8 bNumConfigurations;
658 } __attribute__ ((packed));
661 /*-------------------------------------------------------------------------*/
663 /* USB_DT_OTG (from OTG 1.0a supplement) */
664 struct usb_otg_descriptor {
666 __u8 bDescriptorType;
668 __u8 bmAttributes; /* support for HNP, SRP, etc */
669 } __attribute__ ((packed));
671 /* from usb_otg_descriptor.bmAttributes */
672 #define USB_OTG_SRP (1 << 0)
673 #define USB_OTG_HNP (1 << 1) /* swap host/device roles */
675 /*-------------------------------------------------------------------------*/
677 /* USB_DT_DEBUG: for special highspeed devices, replacing serial console */
678 struct usb_debug_descriptor {
680 __u8 bDescriptorType;
682 /* bulk endpoints with 8 byte maxpacket */
683 __u8 bDebugInEndpoint;
684 __u8 bDebugOutEndpoint;
685 } __attribute__((packed));
687 /*-------------------------------------------------------------------------*/
689 /* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
690 struct usb_interface_assoc_descriptor {
692 __u8 bDescriptorType;
694 __u8 bFirstInterface;
695 __u8 bInterfaceCount;
697 __u8 bFunctionSubClass;
698 __u8 bFunctionProtocol;
700 } __attribute__ ((packed));
703 /*-------------------------------------------------------------------------*/
705 /* USB_DT_SECURITY: group of wireless security descriptors, including
706 * encryption types available for setting up a CC/association.
708 struct usb_security_descriptor {
710 __u8 bDescriptorType;
713 __u8 bNumEncryptionTypes;
714 } __attribute__((packed));
716 /*-------------------------------------------------------------------------*/
718 /* USB_DT_KEY: used with {GET,SET}_SECURITY_DATA; only public keys
721 struct usb_key_descriptor {
723 __u8 bDescriptorType;
728 } __attribute__((packed));
730 /*-------------------------------------------------------------------------*/
732 /* USB_DT_ENCRYPTION_TYPE: bundled in DT_SECURITY groups */
733 struct usb_encryption_descriptor {
735 __u8 bDescriptorType;
737 __u8 bEncryptionType;
738 #define USB_ENC_TYPE_UNSECURE 0
739 #define USB_ENC_TYPE_WIRED 1 /* non-wireless mode */
740 #define USB_ENC_TYPE_CCM_1 2 /* aes128/cbc session */
741 #define USB_ENC_TYPE_RSA_1 3 /* rsa3072/sha1 auth */
742 __u8 bEncryptionValue; /* use in SET_ENCRYPTION */
744 } __attribute__((packed));
747 /*-------------------------------------------------------------------------*/
749 /* USB_DT_BOS: group of device-level capabilities */
750 struct usb_bos_descriptor {
752 __u8 bDescriptorType;
756 } __attribute__((packed));
758 #define USB_DT_BOS_SIZE 5
759 /*-------------------------------------------------------------------------*/
761 /* USB_DT_DEVICE_CAPABILITY: grouped with BOS */
762 struct usb_dev_cap_header {
764 __u8 bDescriptorType;
765 __u8 bDevCapabilityType;
766 } __attribute__((packed));
768 #define USB_CAP_TYPE_WIRELESS_USB 1
770 struct usb_wireless_cap_descriptor { /* Ultra Wide Band */
772 __u8 bDescriptorType;
773 __u8 bDevCapabilityType;
776 #define USB_WIRELESS_P2P_DRD (1 << 1)
777 #define USB_WIRELESS_BEACON_MASK (3 << 2)
778 #define USB_WIRELESS_BEACON_SELF (1 << 2)
779 #define USB_WIRELESS_BEACON_DIRECTED (2 << 2)
780 #define USB_WIRELESS_BEACON_NONE (3 << 2)
781 __le16 wPHYRates; /* bit rates, Mbps */
782 #define USB_WIRELESS_PHY_53 (1 << 0) /* always set */
783 #define USB_WIRELESS_PHY_80 (1 << 1)
784 #define USB_WIRELESS_PHY_107 (1 << 2) /* always set */
785 #define USB_WIRELESS_PHY_160 (1 << 3)
786 #define USB_WIRELESS_PHY_200 (1 << 4) /* always set */
787 #define USB_WIRELESS_PHY_320 (1 << 5)
788 #define USB_WIRELESS_PHY_400 (1 << 6)
789 #define USB_WIRELESS_PHY_480 (1 << 7)
790 __u8 bmTFITXPowerInfo; /* TFI power levels */
791 __u8 bmFFITXPowerInfo; /* FFI power levels */
794 } __attribute__((packed));
796 /* USB 2.0 Extension descriptor */
797 #define USB_CAP_TYPE_EXT 2
799 struct usb_ext_cap_descriptor { /* Link Power Management */
801 __u8 bDescriptorType;
802 __u8 bDevCapabilityType;
804 #define USB_LPM_SUPPORT (1 << 1) /* supports LPM */
805 #define USB_BESL_SUPPORT (1 << 2) /* supports BESL */
806 #define USB_BESL_BASELINE_VALID (1 << 3) /* Baseline BESL valid*/
807 #define USB_BESL_DEEP_VALID (1 << 4) /* Deep BESL valid */
808 #define USB_GET_BESL_BASELINE(p) (((p) & (0xf << 8)) >> 8)
809 #define USB_GET_BESL_DEEP(p) (((p) & (0xf << 12)) >> 12)
810 } __attribute__((packed));
812 #define USB_DT_USB_EXT_CAP_SIZE 7
815 * SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB
816 * specific device level capabilities
818 #define USB_SS_CAP_TYPE 3
819 struct usb_ss_cap_descriptor { /* Link Power Management */
821 __u8 bDescriptorType;
822 __u8 bDevCapabilityType;
824 #define USB_LTM_SUPPORT (1 << 1) /* supports LTM */
825 __le16 wSpeedSupported;
826 #define USB_LOW_SPEED_OPERATION (1) /* Low speed operation */
827 #define USB_FULL_SPEED_OPERATION (1 << 1) /* Full speed operation */
828 #define USB_HIGH_SPEED_OPERATION (1 << 2) /* High speed operation */
829 #define USB_5GBPS_OPERATION (1 << 3) /* Operation at 5Gbps */
830 __u8 bFunctionalitySupport;
832 __le16 bU2DevExitLat;
833 } __attribute__((packed));
835 #define USB_DT_USB_SS_CAP_SIZE 10
838 * Container ID Capability descriptor: Defines the instance unique ID used to
839 * identify the instance across all operating modes
841 #define CONTAINER_ID_TYPE 4
842 struct usb_ss_container_id_descriptor {
844 __u8 bDescriptorType;
845 __u8 bDevCapabilityType;
847 __u8 ContainerID[16]; /* 128-bit number */
848 } __attribute__((packed));
850 #define USB_DT_USB_SS_CONTN_ID_SIZE 20
851 /*-------------------------------------------------------------------------*/
853 /* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with
854 * each endpoint descriptor for a wireless device
856 struct usb_wireless_ep_comp_descriptor {
858 __u8 bDescriptorType;
862 __le16 wMaxStreamDelay;
863 __le16 wOverTheAirPacketSize;
864 __u8 bOverTheAirInterval;
865 __u8 bmCompAttributes;
866 #define USB_ENDPOINT_SWITCH_MASK 0x03 /* in bmCompAttributes */
867 #define USB_ENDPOINT_SWITCH_NO 0
868 #define USB_ENDPOINT_SWITCH_SWITCH 1
869 #define USB_ENDPOINT_SWITCH_SCALE 2
870 } __attribute__((packed));
872 /*-------------------------------------------------------------------------*/
874 /* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
875 * host and a device for connection set up, mutual authentication, and
876 * exchanging short lived session keys. The handshake depends on a CC.
878 struct usb_handshake {
886 } __attribute__((packed));
888 /*-------------------------------------------------------------------------*/
890 /* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
891 * A CC may also be set up using non-wireless secure channels (including
892 * wired USB!), and some devices may support CCs with multiple hosts.
894 struct usb_connection_context {
895 __u8 CHID[16]; /* persistent host id */
896 __u8 CDID[16]; /* device id (unique w/in host context) */
897 __u8 CK[16]; /* connection key */
898 } __attribute__((packed));
900 /*-------------------------------------------------------------------------*/
902 /* USB 2.0 defines three speeds, here's how Linux identifies them */
904 enum usb_device_speed {
905 USB_SPEED_UNKNOWN = 0, /* enumerating */
906 USB_SPEED_LOW, USB_SPEED_FULL, /* usb 1.1 */
907 USB_SPEED_HIGH, /* usb 2.0 */
908 USB_SPEED_WIRELESS, /* wireless (usb 2.5) */
909 USB_SPEED_SUPER, /* usb 3.0 */
915 * usb_speed_string() - Returns human readable-name of the speed.
916 * @speed: The speed to return human-readable name for. If it's not
917 * any of the speeds defined in usb_device_speed enum, string for
918 * USB_SPEED_UNKNOWN will be returned.
920 extern const char *usb_speed_string(enum usb_device_speed speed);
924 enum usb_device_state {
925 /* NOTATTACHED isn't in the USB spec, and this state acts
926 * the same as ATTACHED ... but it's clearer this way.
928 USB_STATE_NOTATTACHED = 0,
930 /* chapter 9 and authentication (wireless) device states */
932 USB_STATE_POWERED, /* wired */
933 USB_STATE_RECONNECTING, /* auth */
934 USB_STATE_UNAUTHENTICATED, /* auth */
935 USB_STATE_DEFAULT, /* limited function */
937 USB_STATE_CONFIGURED, /* most functions */
941 /* NOTE: there are actually four different SUSPENDED
942 * states, returning to POWERED, DEFAULT, ADDRESS, or
943 * CONFIGURED respectively when SOF tokens flow again.
944 * At this level there's no difference between L1 and L2
945 * suspend states. (L2 being original USB 1.1 suspend.)
949 enum usb3_link_state {
957 * A U1 timeout of 0x0 means the parent hub will reject any transitions to U1.
958 * 0xff means the parent hub will accept transitions to U1, but will not
959 * initiate a transition.
961 * A U1 timeout of 0x1 to 0x7F also causes the hub to initiate a transition to
962 * U1 after that many microseconds. Timeouts of 0x80 to 0xFE are reserved
965 * A U2 timeout of 0x0 means the parent hub will reject any transitions to U2.
966 * 0xff means the parent hub will accept transitions to U2, but will not
967 * initiate a transition.
969 * A U2 timeout of 0x1 to 0xFE also causes the hub to initiate a transition to
970 * U2 after N*256 microseconds. Therefore a U2 timeout value of 0x1 means a U2
971 * idle timer of 256 microseconds, 0x2 means 512 microseconds, 0xFE means
974 #define USB3_LPM_DISABLED 0x0
975 #define USB3_LPM_U1_MAX_TIMEOUT 0x7F
976 #define USB3_LPM_U2_MAX_TIMEOUT 0xFE
977 #define USB3_LPM_DEVICE_INITIATED 0xFF
979 struct usb_set_sel_req {
984 } __attribute__ ((packed));
987 * The Set System Exit Latency control transfer provides one byte each for
988 * U1 SEL and U1 PEL, so the max exit latency is 0xFF. U2 SEL and U2 PEL each
989 * are two bytes long.
991 #define USB3_LPM_MAX_U1_SEL_PEL 0xFF
992 #define USB3_LPM_MAX_U2_SEL_PEL 0xFFFF
994 /*-------------------------------------------------------------------------*/
997 * As per USB compliance update, a device that is actively drawing
998 * more than 100mA from USB must report itself as bus-powered in
999 * the GetStatus(DEVICE) call.
1000 * http://compliance.usb.org/index.asp?UpdateFile=Electrical&Format=Standard#34
1002 #define USB_SELF_POWER_VBUS_MAX_DRAW 100
1004 #endif /* __LINUX_USB_CH9_H */