1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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
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.
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.
17 * There's also "Wireless USB", using low power short range radios for
18 * peripheral interconnection but otherwise building on the USB framework.
20 * Note all descriptors are declared '__attribute__((packed))' so that:
22 * [a] they never get padded, either internally (USB spec writers
23 * probably handled that) or externally;
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
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.
34 #ifndef _UAPI__LINUX_USB_CH9_H
35 #define _UAPI__LINUX_USB_CH9_H
37 #include <linux/types.h> /* __u8 etc */
38 #include <asm/byteorder.h> /* le16_to_cpu */
40 /*-------------------------------------------------------------------------*/
42 /* CONTROL REQUEST SUPPORT */
47 * This bit flag is used in endpoint descriptors' bEndpointAddress field.
48 * It's also one of three fields in control requests bRequestType.
50 #define USB_DIR_OUT 0 /* to device */
51 #define USB_DIR_IN 0x80 /* to host */
54 * USB types, the second of three bRequestType fields
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)
63 * USB recipients, the third of three bRequestType fields
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
75 * Standard requests, for the bRequest field of a SETUP packet.
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.
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
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
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
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 ...
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.
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) */
138 * Test Mode Selectors
139 * See USB 2.0 spec Table 9-7
143 #define TEST_SE0_NAK 3
144 #define TEST_PACKET 4
145 #define TEST_FORCE_EN 5
148 * New Feature Selectors as added by USB 3.0
149 * See USB 3.0 spec Table 9-7
151 #define USB_DEVICE_U1_ENABLE 48 /* dev may initiate U1 transition */
152 #define USB_DEVICE_U2_ENABLE 49 /* dev may initiate U2 transition */
153 #define USB_DEVICE_LTM_ENABLE 50 /* dev may send LTM */
154 #define USB_INTRF_FUNC_SUSPEND 0 /* function suspend */
156 #define USB_INTR_FUNC_SUSPEND_OPT_MASK 0xFF00
158 * Suspend Options, Table 9-8 USB 3.0 spec
160 #define USB_INTRF_FUNC_SUSPEND_LP (1 << (8 + 0))
161 #define USB_INTRF_FUNC_SUSPEND_RW (1 << (8 + 1))
164 * Interface status, Figure 9-5 USB 3.0 spec
166 #define USB_INTRF_STAT_FUNC_RW_CAP 1
167 #define USB_INTRF_STAT_FUNC_RW 2
169 #define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */
171 /* Bit array elements as returned by the USB_REQ_GET_STATUS request. */
172 #define USB_DEV_STAT_U1_ENABLED 2 /* transition into U1 state */
173 #define USB_DEV_STAT_U2_ENABLED 3 /* transition into U2 state */
174 #define USB_DEV_STAT_LTM_ENABLED 4 /* Latency tolerance messages */
177 * Feature selectors from Table 9-8 USB Power Delivery spec
179 #define USB_DEVICE_BATTERY_WAKE_MASK 40
180 #define USB_DEVICE_OS_IS_PD_AWARE 41
181 #define USB_DEVICE_POLICY_MODE 42
182 #define USB_PORT_PR_SWAP 43
183 #define USB_PORT_GOTO_MIN 44
184 #define USB_PORT_RETURN_POWER 45
185 #define USB_PORT_ACCEPT_PD_REQUEST 46
186 #define USB_PORT_REJECT_PD_REQUEST 47
187 #define USB_PORT_PORT_PD_RESET 48
188 #define USB_PORT_C_PORT_PD_CHANGE 49
189 #define USB_PORT_CABLE_PD_RESET 50
190 #define USB_DEVICE_CHARGING_POLICY 54
193 * struct usb_ctrlrequest - SETUP data for a USB device control request
194 * @bRequestType: matches the USB bmRequestType field
195 * @bRequest: matches the USB bRequest field
196 * @wValue: matches the USB wValue field (le16 byte order)
197 * @wIndex: matches the USB wIndex field (le16 byte order)
198 * @wLength: matches the USB wLength field (le16 byte order)
200 * This structure is used to send control requests to a USB device. It matches
201 * the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the
202 * USB spec for a fuller description of the different fields, and what they are
205 * Note that the driver for any interface can issue control requests.
206 * For most devices, interfaces don't coordinate with each other, so
207 * such requests may be made at any time.
209 struct usb_ctrlrequest {
215 } __attribute__ ((packed));
217 /*-------------------------------------------------------------------------*/
220 * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
221 * (rarely) accepted by SET_DESCRIPTOR.
223 * Note that all multi-byte values here are encoded in little endian
224 * byte order "on the wire". Within the kernel and when exposed
225 * through the Linux-USB APIs, they are not converted to cpu byte
226 * order; it is the responsibility of the client code to do this.
227 * The single exception is when device and configuration descriptors (but
228 * not other descriptors) are read from character devices
229 * (i.e. /dev/bus/usb/BBB/DDD);
230 * in this case the fields are converted to host endianness by the kernel.
234 * Descriptor types ... USB 2.0 spec table 9.5
236 #define USB_DT_DEVICE 0x01
237 #define USB_DT_CONFIG 0x02
238 #define USB_DT_STRING 0x03
239 #define USB_DT_INTERFACE 0x04
240 #define USB_DT_ENDPOINT 0x05
241 #define USB_DT_DEVICE_QUALIFIER 0x06
242 #define USB_DT_OTHER_SPEED_CONFIG 0x07
243 #define USB_DT_INTERFACE_POWER 0x08
244 /* these are from a minor usb 2.0 revision (ECN) */
245 #define USB_DT_OTG 0x09
246 #define USB_DT_DEBUG 0x0a
247 #define USB_DT_INTERFACE_ASSOCIATION 0x0b
248 /* these are from the Wireless USB spec */
249 #define USB_DT_SECURITY 0x0c
250 #define USB_DT_KEY 0x0d
251 #define USB_DT_ENCRYPTION_TYPE 0x0e
252 #define USB_DT_BOS 0x0f
253 #define USB_DT_DEVICE_CAPABILITY 0x10
254 #define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
255 #define USB_DT_WIRE_ADAPTER 0x21
256 #define USB_DT_RPIPE 0x22
257 #define USB_DT_CS_RADIO_CONTROL 0x23
258 /* From the T10 UAS specification */
259 #define USB_DT_PIPE_USAGE 0x24
260 /* From the USB 3.0 spec */
261 #define USB_DT_SS_ENDPOINT_COMP 0x30
262 /* From the USB 3.1 spec */
263 #define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
265 /* Conventional codes for class-specific descriptors. The convention is
266 * defined in the USB "Common Class" Spec (3.11). Individual class specs
267 * are authoritative for their usage, not the "common class" writeup.
269 #define USB_DT_CS_DEVICE (USB_TYPE_CLASS | USB_DT_DEVICE)
270 #define USB_DT_CS_CONFIG (USB_TYPE_CLASS | USB_DT_CONFIG)
271 #define USB_DT_CS_STRING (USB_TYPE_CLASS | USB_DT_STRING)
272 #define USB_DT_CS_INTERFACE (USB_TYPE_CLASS | USB_DT_INTERFACE)
273 #define USB_DT_CS_ENDPOINT (USB_TYPE_CLASS | USB_DT_ENDPOINT)
275 /* All standard descriptors have these 2 fields at the beginning */
276 struct usb_descriptor_header {
278 __u8 bDescriptorType;
279 } __attribute__ ((packed));
282 /*-------------------------------------------------------------------------*/
284 /* USB_DT_DEVICE: Device descriptor */
285 struct usb_device_descriptor {
287 __u8 bDescriptorType;
291 __u8 bDeviceSubClass;
292 __u8 bDeviceProtocol;
293 __u8 bMaxPacketSize0;
300 __u8 bNumConfigurations;
301 } __attribute__ ((packed));
303 #define USB_DT_DEVICE_SIZE 18
307 * Device and/or Interface Class codes
308 * as found in bDeviceClass or bInterfaceClass
309 * and defined by www.usb.org documents
311 #define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
312 #define USB_CLASS_AUDIO 1
313 #define USB_CLASS_COMM 2
314 #define USB_CLASS_HID 3
315 #define USB_CLASS_PHYSICAL 5
316 #define USB_CLASS_STILL_IMAGE 6
317 #define USB_CLASS_PRINTER 7
318 #define USB_CLASS_MASS_STORAGE 8
319 #define USB_CLASS_HUB 9
320 #define USB_CLASS_CDC_DATA 0x0a
321 #define USB_CLASS_CSCID 0x0b /* chip+ smart card */
322 #define USB_CLASS_CONTENT_SEC 0x0d /* content security */
323 #define USB_CLASS_VIDEO 0x0e
324 #define USB_CLASS_WIRELESS_CONTROLLER 0xe0
325 #define USB_CLASS_MISC 0xef
326 #define USB_CLASS_APP_SPEC 0xfe
327 #define USB_CLASS_VENDOR_SPEC 0xff
329 #define USB_SUBCLASS_VENDOR_SPEC 0xff
331 /*-------------------------------------------------------------------------*/
333 /* USB_DT_CONFIG: Configuration descriptor information.
335 * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
336 * descriptor type is different. Highspeed-capable devices can look
337 * different depending on what speed they're currently running. Only
338 * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
341 struct usb_config_descriptor {
343 __u8 bDescriptorType;
347 __u8 bConfigurationValue;
351 } __attribute__ ((packed));
353 #define USB_DT_CONFIG_SIZE 9
355 /* from config descriptor bmAttributes */
356 #define USB_CONFIG_ATT_ONE (1 << 7) /* must be set */
357 #define USB_CONFIG_ATT_SELFPOWER (1 << 6) /* self powered */
358 #define USB_CONFIG_ATT_WAKEUP (1 << 5) /* can wakeup */
359 #define USB_CONFIG_ATT_BATTERY (1 << 4) /* battery powered */
361 /*-------------------------------------------------------------------------*/
363 /* USB String descriptors can contain at most 126 characters. */
364 #define USB_MAX_STRING_LEN 126
366 /* USB_DT_STRING: String descriptor */
367 struct usb_string_descriptor {
369 __u8 bDescriptorType;
371 __le16 wData[1]; /* UTF-16LE encoded */
372 } __attribute__ ((packed));
374 /* note that "string" zero is special, it holds language codes that
375 * the device supports, not Unicode characters.
378 /*-------------------------------------------------------------------------*/
380 /* USB_DT_INTERFACE: Interface descriptor */
381 struct usb_interface_descriptor {
383 __u8 bDescriptorType;
385 __u8 bInterfaceNumber;
386 __u8 bAlternateSetting;
388 __u8 bInterfaceClass;
389 __u8 bInterfaceSubClass;
390 __u8 bInterfaceProtocol;
392 } __attribute__ ((packed));
394 #define USB_DT_INTERFACE_SIZE 9
396 /*-------------------------------------------------------------------------*/
398 /* USB_DT_ENDPOINT: Endpoint descriptor */
399 struct usb_endpoint_descriptor {
401 __u8 bDescriptorType;
403 __u8 bEndpointAddress;
405 __le16 wMaxPacketSize;
408 /* NOTE: these two are _only_ in audio endpoints. */
409 /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
412 } __attribute__ ((packed));
414 #define USB_DT_ENDPOINT_SIZE 7
415 #define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
421 #define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */
422 #define USB_ENDPOINT_DIR_MASK 0x80
424 #define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */
425 #define USB_ENDPOINT_XFER_CONTROL 0
426 #define USB_ENDPOINT_XFER_ISOC 1
427 #define USB_ENDPOINT_XFER_BULK 2
428 #define USB_ENDPOINT_XFER_INT 3
429 #define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
431 #define USB_ENDPOINT_MAXP_MASK 0x07ff
432 #define USB_EP_MAXP_MULT_SHIFT 11
433 #define USB_EP_MAXP_MULT_MASK (3 << USB_EP_MAXP_MULT_SHIFT)
434 #define USB_EP_MAXP_MULT(m) \
435 (((m) & USB_EP_MAXP_MULT_MASK) >> USB_EP_MAXP_MULT_SHIFT)
437 /* The USB 3.0 spec redefines bits 5:4 of bmAttributes as interrupt ep type. */
438 #define USB_ENDPOINT_INTRTYPE 0x30
439 #define USB_ENDPOINT_INTR_PERIODIC (0 << 4)
440 #define USB_ENDPOINT_INTR_NOTIFICATION (1 << 4)
442 #define USB_ENDPOINT_SYNCTYPE 0x0c
443 #define USB_ENDPOINT_SYNC_NONE (0 << 2)
444 #define USB_ENDPOINT_SYNC_ASYNC (1 << 2)
445 #define USB_ENDPOINT_SYNC_ADAPTIVE (2 << 2)
446 #define USB_ENDPOINT_SYNC_SYNC (3 << 2)
448 #define USB_ENDPOINT_USAGE_MASK 0x30
449 #define USB_ENDPOINT_USAGE_DATA 0x00
450 #define USB_ENDPOINT_USAGE_FEEDBACK 0x10
451 #define USB_ENDPOINT_USAGE_IMPLICIT_FB 0x20 /* Implicit feedback Data endpoint */
453 /*-------------------------------------------------------------------------*/
456 * usb_endpoint_num - get the endpoint's number
457 * @epd: endpoint to be checked
459 * Returns @epd's number: 0 to 15.
461 static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
463 return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
467 * usb_endpoint_type - get the endpoint's transfer type
468 * @epd: endpoint to be checked
470 * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
471 * to @epd's transfer type.
473 static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
475 return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
479 * usb_endpoint_dir_in - check if the endpoint has IN direction
480 * @epd: endpoint to be checked
482 * Returns true if the endpoint is of type IN, otherwise it returns false.
484 static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
486 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN);
490 * usb_endpoint_dir_out - check if the endpoint has OUT direction
491 * @epd: endpoint to be checked
493 * Returns true if the endpoint is of type OUT, otherwise it returns false.
495 static inline int usb_endpoint_dir_out(
496 const struct usb_endpoint_descriptor *epd)
498 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT);
502 * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type
503 * @epd: endpoint to be checked
505 * Returns true if the endpoint is of type bulk, otherwise it returns false.
507 static inline int usb_endpoint_xfer_bulk(
508 const struct usb_endpoint_descriptor *epd)
510 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
511 USB_ENDPOINT_XFER_BULK);
515 * usb_endpoint_xfer_control - check if the endpoint has control transfer type
516 * @epd: endpoint to be checked
518 * Returns true if the endpoint is of type control, otherwise it returns false.
520 static inline int usb_endpoint_xfer_control(
521 const struct usb_endpoint_descriptor *epd)
523 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
524 USB_ENDPOINT_XFER_CONTROL);
528 * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type
529 * @epd: endpoint to be checked
531 * Returns true if the endpoint is of type interrupt, otherwise it returns
534 static inline int usb_endpoint_xfer_int(
535 const struct usb_endpoint_descriptor *epd)
537 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
538 USB_ENDPOINT_XFER_INT);
542 * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type
543 * @epd: endpoint to be checked
545 * Returns true if the endpoint is of type isochronous, otherwise it returns
548 static inline int usb_endpoint_xfer_isoc(
549 const struct usb_endpoint_descriptor *epd)
551 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
552 USB_ENDPOINT_XFER_ISOC);
556 * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN
557 * @epd: endpoint to be checked
559 * Returns true if the endpoint has bulk transfer type and IN direction,
560 * otherwise it returns false.
562 static inline int usb_endpoint_is_bulk_in(
563 const struct usb_endpoint_descriptor *epd)
565 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd);
569 * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT
570 * @epd: endpoint to be checked
572 * Returns true if the endpoint has bulk transfer type and OUT direction,
573 * otherwise it returns false.
575 static inline int usb_endpoint_is_bulk_out(
576 const struct usb_endpoint_descriptor *epd)
578 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd);
582 * usb_endpoint_is_int_in - check if the endpoint is interrupt IN
583 * @epd: endpoint to be checked
585 * Returns true if the endpoint has interrupt transfer type and IN direction,
586 * otherwise it returns false.
588 static inline int usb_endpoint_is_int_in(
589 const struct usb_endpoint_descriptor *epd)
591 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd);
595 * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT
596 * @epd: endpoint to be checked
598 * Returns true if the endpoint has interrupt transfer type and OUT direction,
599 * otherwise it returns false.
601 static inline int usb_endpoint_is_int_out(
602 const struct usb_endpoint_descriptor *epd)
604 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd);
608 * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN
609 * @epd: endpoint to be checked
611 * Returns true if the endpoint has isochronous transfer type and IN direction,
612 * otherwise it returns false.
614 static inline int usb_endpoint_is_isoc_in(
615 const struct usb_endpoint_descriptor *epd)
617 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd);
621 * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT
622 * @epd: endpoint to be checked
624 * Returns true if the endpoint has isochronous transfer type and OUT direction,
625 * otherwise it returns false.
627 static inline int usb_endpoint_is_isoc_out(
628 const struct usb_endpoint_descriptor *epd)
630 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd);
634 * usb_endpoint_maxp - get endpoint's max packet size
635 * @epd: endpoint to be checked
637 * Returns @epd's max packet bits [10:0]
639 static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd)
641 return __le16_to_cpu(epd->wMaxPacketSize) & USB_ENDPOINT_MAXP_MASK;
645 * usb_endpoint_maxp_mult - get endpoint's transactional opportunities
646 * @epd: endpoint to be checked
648 * Return @epd's wMaxPacketSize[12:11] + 1
651 usb_endpoint_maxp_mult(const struct usb_endpoint_descriptor *epd)
653 int maxp = __le16_to_cpu(epd->wMaxPacketSize);
655 return USB_EP_MAXP_MULT(maxp) + 1;
658 static inline int usb_endpoint_interrupt_type(
659 const struct usb_endpoint_descriptor *epd)
661 return epd->bmAttributes & USB_ENDPOINT_INTRTYPE;
664 /*-------------------------------------------------------------------------*/
666 /* USB_DT_SSP_ISOC_ENDPOINT_COMP: SuperSpeedPlus Isochronous Endpoint Companion
669 struct usb_ssp_isoc_ep_comp_descriptor {
671 __u8 bDescriptorType;
673 __le32 dwBytesPerInterval;
674 } __attribute__ ((packed));
676 #define USB_DT_SSP_ISOC_EP_COMP_SIZE 8
678 /*-------------------------------------------------------------------------*/
680 /* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
681 struct usb_ss_ep_comp_descriptor {
683 __u8 bDescriptorType;
687 __le16 wBytesPerInterval;
688 } __attribute__ ((packed));
690 #define USB_DT_SS_EP_COMP_SIZE 6
692 /* Bits 4:0 of bmAttributes if this is a bulk endpoint */
694 usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp)
701 max_streams = comp->bmAttributes & 0x1f;
706 max_streams = 1 << max_streams;
711 /* Bits 1:0 of bmAttributes if this is an isoc endpoint */
712 #define USB_SS_MULT(p) (1 + ((p) & 0x3))
713 /* Bit 7 of bmAttributes if a SSP isoc endpoint companion descriptor exists */
714 #define USB_SS_SSP_ISOC_COMP(p) ((p) & (1 << 7))
716 /*-------------------------------------------------------------------------*/
718 /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
719 struct usb_qualifier_descriptor {
721 __u8 bDescriptorType;
725 __u8 bDeviceSubClass;
726 __u8 bDeviceProtocol;
727 __u8 bMaxPacketSize0;
728 __u8 bNumConfigurations;
730 } __attribute__ ((packed));
733 /*-------------------------------------------------------------------------*/
735 /* USB_DT_OTG (from OTG 1.0a supplement) */
736 struct usb_otg_descriptor {
738 __u8 bDescriptorType;
740 __u8 bmAttributes; /* support for HNP, SRP, etc */
741 } __attribute__ ((packed));
743 /* USB_DT_OTG (from OTG 2.0 supplement) */
744 struct usb_otg20_descriptor {
746 __u8 bDescriptorType;
748 __u8 bmAttributes; /* support for HNP, SRP and ADP, etc */
749 __le16 bcdOTG; /* OTG and EH supplement release number
750 * in binary-coded decimal(i.e. 2.0 is 0200H)
752 } __attribute__ ((packed));
754 /* from usb_otg_descriptor.bmAttributes */
755 #define USB_OTG_SRP (1 << 0)
756 #define USB_OTG_HNP (1 << 1) /* swap host/device roles */
757 #define USB_OTG_ADP (1 << 2) /* support ADP */
759 #define OTG_STS_SELECTOR 0xF000 /* OTG status selector */
760 /*-------------------------------------------------------------------------*/
762 /* USB_DT_DEBUG: for special highspeed devices, replacing serial console */
763 struct usb_debug_descriptor {
765 __u8 bDescriptorType;
767 /* bulk endpoints with 8 byte maxpacket */
768 __u8 bDebugInEndpoint;
769 __u8 bDebugOutEndpoint;
770 } __attribute__((packed));
772 /*-------------------------------------------------------------------------*/
774 /* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
775 struct usb_interface_assoc_descriptor {
777 __u8 bDescriptorType;
779 __u8 bFirstInterface;
780 __u8 bInterfaceCount;
782 __u8 bFunctionSubClass;
783 __u8 bFunctionProtocol;
785 } __attribute__ ((packed));
787 #define USB_DT_INTERFACE_ASSOCIATION_SIZE 8
789 /*-------------------------------------------------------------------------*/
791 /* USB_DT_SECURITY: group of wireless security descriptors, including
792 * encryption types available for setting up a CC/association.
794 struct usb_security_descriptor {
796 __u8 bDescriptorType;
799 __u8 bNumEncryptionTypes;
800 } __attribute__((packed));
802 /*-------------------------------------------------------------------------*/
804 /* USB_DT_KEY: used with {GET,SET}_SECURITY_DATA; only public keys
807 struct usb_key_descriptor {
809 __u8 bDescriptorType;
814 } __attribute__((packed));
816 /*-------------------------------------------------------------------------*/
818 /* USB_DT_ENCRYPTION_TYPE: bundled in DT_SECURITY groups */
819 struct usb_encryption_descriptor {
821 __u8 bDescriptorType;
823 __u8 bEncryptionType;
824 #define USB_ENC_TYPE_UNSECURE 0
825 #define USB_ENC_TYPE_WIRED 1 /* non-wireless mode */
826 #define USB_ENC_TYPE_CCM_1 2 /* aes128/cbc session */
827 #define USB_ENC_TYPE_RSA_1 3 /* rsa3072/sha1 auth */
828 __u8 bEncryptionValue; /* use in SET_ENCRYPTION */
830 } __attribute__((packed));
833 /*-------------------------------------------------------------------------*/
835 /* USB_DT_BOS: group of device-level capabilities */
836 struct usb_bos_descriptor {
838 __u8 bDescriptorType;
842 } __attribute__((packed));
844 #define USB_DT_BOS_SIZE 5
845 /*-------------------------------------------------------------------------*/
847 /* USB_DT_DEVICE_CAPABILITY: grouped with BOS */
848 struct usb_dev_cap_header {
850 __u8 bDescriptorType;
851 __u8 bDevCapabilityType;
852 } __attribute__((packed));
854 #define USB_CAP_TYPE_WIRELESS_USB 1
856 struct usb_wireless_cap_descriptor { /* Ultra Wide Band */
858 __u8 bDescriptorType;
859 __u8 bDevCapabilityType;
862 #define USB_WIRELESS_P2P_DRD (1 << 1)
863 #define USB_WIRELESS_BEACON_MASK (3 << 2)
864 #define USB_WIRELESS_BEACON_SELF (1 << 2)
865 #define USB_WIRELESS_BEACON_DIRECTED (2 << 2)
866 #define USB_WIRELESS_BEACON_NONE (3 << 2)
867 __le16 wPHYRates; /* bit rates, Mbps */
868 #define USB_WIRELESS_PHY_53 (1 << 0) /* always set */
869 #define USB_WIRELESS_PHY_80 (1 << 1)
870 #define USB_WIRELESS_PHY_107 (1 << 2) /* always set */
871 #define USB_WIRELESS_PHY_160 (1 << 3)
872 #define USB_WIRELESS_PHY_200 (1 << 4) /* always set */
873 #define USB_WIRELESS_PHY_320 (1 << 5)
874 #define USB_WIRELESS_PHY_400 (1 << 6)
875 #define USB_WIRELESS_PHY_480 (1 << 7)
876 __u8 bmTFITXPowerInfo; /* TFI power levels */
877 __u8 bmFFITXPowerInfo; /* FFI power levels */
880 } __attribute__((packed));
882 #define USB_DT_USB_WIRELESS_CAP_SIZE 11
884 /* USB 2.0 Extension descriptor */
885 #define USB_CAP_TYPE_EXT 2
887 struct usb_ext_cap_descriptor { /* Link Power Management */
889 __u8 bDescriptorType;
890 __u8 bDevCapabilityType;
892 #define USB_LPM_SUPPORT (1 << 1) /* supports LPM */
893 #define USB_BESL_SUPPORT (1 << 2) /* supports BESL */
894 #define USB_BESL_BASELINE_VALID (1 << 3) /* Baseline BESL valid*/
895 #define USB_BESL_DEEP_VALID (1 << 4) /* Deep BESL valid */
896 #define USB_GET_BESL_BASELINE(p) (((p) & (0xf << 8)) >> 8)
897 #define USB_GET_BESL_DEEP(p) (((p) & (0xf << 12)) >> 12)
898 } __attribute__((packed));
900 #define USB_DT_USB_EXT_CAP_SIZE 7
903 * SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB
904 * specific device level capabilities
906 #define USB_SS_CAP_TYPE 3
907 struct usb_ss_cap_descriptor { /* Link Power Management */
909 __u8 bDescriptorType;
910 __u8 bDevCapabilityType;
912 #define USB_LTM_SUPPORT (1 << 1) /* supports LTM */
913 __le16 wSpeedSupported;
914 #define USB_LOW_SPEED_OPERATION (1) /* Low speed operation */
915 #define USB_FULL_SPEED_OPERATION (1 << 1) /* Full speed operation */
916 #define USB_HIGH_SPEED_OPERATION (1 << 2) /* High speed operation */
917 #define USB_5GBPS_OPERATION (1 << 3) /* Operation at 5Gbps */
918 __u8 bFunctionalitySupport;
920 __le16 bU2DevExitLat;
921 } __attribute__((packed));
923 #define USB_DT_USB_SS_CAP_SIZE 10
926 * Container ID Capability descriptor: Defines the instance unique ID used to
927 * identify the instance across all operating modes
929 #define CONTAINER_ID_TYPE 4
930 struct usb_ss_container_id_descriptor {
932 __u8 bDescriptorType;
933 __u8 bDevCapabilityType;
935 __u8 ContainerID[16]; /* 128-bit number */
936 } __attribute__((packed));
938 #define USB_DT_USB_SS_CONTN_ID_SIZE 20
941 * SuperSpeed Plus USB Capability descriptor: Defines the set of
942 * SuperSpeed Plus USB specific device level capabilities
944 #define USB_SSP_CAP_TYPE 0xa
945 struct usb_ssp_cap_descriptor {
947 __u8 bDescriptorType;
948 __u8 bDevCapabilityType;
951 #define USB_SSP_SUBLINK_SPEED_ATTRIBS (0x1f << 0) /* sublink speed entries */
952 #define USB_SSP_SUBLINK_SPEED_IDS (0xf << 5) /* speed ID entries */
953 __le16 wFunctionalitySupport;
954 #define USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID (0xf)
955 #define USB_SSP_MIN_RX_LANE_COUNT (0xf << 8)
956 #define USB_SSP_MIN_TX_LANE_COUNT (0xf << 12)
958 __le32 bmSublinkSpeedAttr[1]; /* list of sublink speed attrib entries */
959 #define USB_SSP_SUBLINK_SPEED_SSID (0xf) /* sublink speed ID */
960 #define USB_SSP_SUBLINK_SPEED_LSE (0x3 << 4) /* Lanespeed exponent */
961 #define USB_SSP_SUBLINK_SPEED_ST (0x3 << 6) /* Sublink type */
962 #define USB_SSP_SUBLINK_SPEED_RSVD (0x3f << 8) /* Reserved */
963 #define USB_SSP_SUBLINK_SPEED_LP (0x3 << 14) /* Link protocol */
964 #define USB_SSP_SUBLINK_SPEED_LSM (0xff << 16) /* Lanespeed mantissa */
965 } __attribute__((packed));
968 * USB Power Delivery Capability Descriptor:
969 * Defines capabilities for PD
971 /* Defines the various PD Capabilities of this device */
972 #define USB_PD_POWER_DELIVERY_CAPABILITY 0x06
973 /* Provides information on each battery supported by the device */
974 #define USB_PD_BATTERY_INFO_CAPABILITY 0x07
975 /* The Consumer characteristics of a Port on the device */
976 #define USB_PD_PD_CONSUMER_PORT_CAPABILITY 0x08
977 /* The provider characteristics of a Port on the device */
978 #define USB_PD_PD_PROVIDER_PORT_CAPABILITY 0x09
980 struct usb_pd_cap_descriptor {
982 __u8 bDescriptorType;
983 __u8 bDevCapabilityType; /* set to USB_PD_POWER_DELIVERY_CAPABILITY */
986 #define USB_PD_CAP_BATTERY_CHARGING (1 << 1) /* supports Battery Charging specification */
987 #define USB_PD_CAP_USB_PD (1 << 2) /* supports USB Power Delivery specification */
988 #define USB_PD_CAP_PROVIDER (1 << 3) /* can provide power */
989 #define USB_PD_CAP_CONSUMER (1 << 4) /* can consume power */
990 #define USB_PD_CAP_CHARGING_POLICY (1 << 5) /* supports CHARGING_POLICY feature */
991 #define USB_PD_CAP_TYPE_C_CURRENT (1 << 6) /* supports power capabilities defined in the USB Type-C Specification */
993 #define USB_PD_CAP_PWR_AC (1 << 8)
994 #define USB_PD_CAP_PWR_BAT (1 << 9)
995 #define USB_PD_CAP_PWR_USE_V_BUS (1 << 14)
997 __le16 bmProviderPorts; /* Bit zero refers to the UFP of the device */
998 __le16 bmConsumerPorts;
1000 __le16 bcdPDVersion;
1001 __le16 bcdUSBTypeCVersion;
1002 } __attribute__((packed));
1004 struct usb_pd_cap_battery_info_descriptor {
1006 __u8 bDescriptorType;
1007 __u8 bDevCapabilityType;
1008 /* Index of string descriptor shall contain the user friendly name for this battery */
1010 /* Index of string descriptor shall contain the Serial Number String for this battery */
1013 __u8 bBatteryId; /* uniquely identifies this battery in status Messages */
1016 * Shall contain the Battery Charge value above which this
1017 * battery is considered to be fully charged but not necessarily
1020 __le32 dwChargedThreshold; /* in mWh */
1022 * Shall contain the minimum charge level of this battery such
1023 * that above this threshold, a device can be assured of being
1024 * able to power up successfully (see Battery Charging 1.2).
1026 __le32 dwWeakThreshold; /* in mWh */
1027 __le32 dwBatteryDesignCapacity; /* in mWh */
1028 __le32 dwBatteryLastFullchargeCapacity; /* in mWh */
1029 } __attribute__((packed));
1031 struct usb_pd_cap_consumer_port_descriptor {
1033 __u8 bDescriptorType;
1034 __u8 bDevCapabilityType;
1036 __u8 bmCapabilities;
1037 /* port will oerate under: */
1038 #define USB_PD_CAP_CONSUMER_BC (1 << 0) /* BC */
1039 #define USB_PD_CAP_CONSUMER_PD (1 << 1) /* PD */
1040 #define USB_PD_CAP_CONSUMER_TYPE_C (1 << 2) /* USB Type-C Current */
1041 __le16 wMinVoltage; /* in 50mV units */
1042 __le16 wMaxVoltage; /* in 50mV units */
1044 __le32 dwMaxOperatingPower; /* in 10 mW - operating at steady state */
1045 __le32 dwMaxPeakPower; /* in 10mW units - operating at peak power */
1046 __le32 dwMaxPeakPowerTime; /* in 100ms units - duration of peak */
1047 #define USB_PD_CAP_CONSUMER_UNKNOWN_PEAK_POWER_TIME 0xffff
1048 } __attribute__((packed));
1050 struct usb_pd_cap_provider_port_descriptor {
1052 __u8 bDescriptorType;
1053 __u8 bDevCapabilityType;
1055 __u8 bmCapabilities;
1056 /* port will oerate under: */
1057 #define USB_PD_CAP_PROVIDER_BC (1 << 0) /* BC */
1058 #define USB_PD_CAP_PROVIDER_PD (1 << 1) /* PD */
1059 #define USB_PD_CAP_PROVIDER_TYPE_C (1 << 2) /* USB Type-C Current */
1060 __u8 bNumOfPDObjects;
1062 __le32 wPowerDataObject[];
1063 } __attribute__((packed));
1066 * Precision time measurement capability descriptor: advertised by devices and
1067 * hubs that support PTM
1069 #define USB_PTM_CAP_TYPE 0xb
1070 struct usb_ptm_cap_descriptor {
1072 __u8 bDescriptorType;
1073 __u8 bDevCapabilityType;
1074 } __attribute__((packed));
1076 #define USB_DT_USB_PTM_ID_SIZE 3
1078 * The size of the descriptor for the Sublink Speed Attribute Count
1079 * (SSAC) specified in bmAttributes[4:0].
1081 #define USB_DT_USB_SSP_CAP_SIZE(ssac) (16 + ssac * 4)
1083 /*-------------------------------------------------------------------------*/
1085 /* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with
1086 * each endpoint descriptor for a wireless device
1088 struct usb_wireless_ep_comp_descriptor {
1090 __u8 bDescriptorType;
1094 __le16 wMaxStreamDelay;
1095 __le16 wOverTheAirPacketSize;
1096 __u8 bOverTheAirInterval;
1097 __u8 bmCompAttributes;
1098 #define USB_ENDPOINT_SWITCH_MASK 0x03 /* in bmCompAttributes */
1099 #define USB_ENDPOINT_SWITCH_NO 0
1100 #define USB_ENDPOINT_SWITCH_SWITCH 1
1101 #define USB_ENDPOINT_SWITCH_SCALE 2
1102 } __attribute__((packed));
1104 /*-------------------------------------------------------------------------*/
1106 /* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
1107 * host and a device for connection set up, mutual authentication, and
1108 * exchanging short lived session keys. The handshake depends on a CC.
1110 struct usb_handshake {
1111 __u8 bMessageNumber;
1118 } __attribute__((packed));
1120 /*-------------------------------------------------------------------------*/
1122 /* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
1123 * A CC may also be set up using non-wireless secure channels (including
1124 * wired USB!), and some devices may support CCs with multiple hosts.
1126 struct usb_connection_context {
1127 __u8 CHID[16]; /* persistent host id */
1128 __u8 CDID[16]; /* device id (unique w/in host context) */
1129 __u8 CK[16]; /* connection key */
1130 } __attribute__((packed));
1132 /*-------------------------------------------------------------------------*/
1134 /* USB 2.0 defines three speeds, here's how Linux identifies them */
1136 enum usb_device_speed {
1137 USB_SPEED_UNKNOWN = 0, /* enumerating */
1138 USB_SPEED_LOW, USB_SPEED_FULL, /* usb 1.1 */
1139 USB_SPEED_HIGH, /* usb 2.0 */
1140 USB_SPEED_WIRELESS, /* wireless (usb 2.5) */
1141 USB_SPEED_SUPER, /* usb 3.0 */
1142 USB_SPEED_SUPER_PLUS, /* usb 3.1 */
1146 enum usb_device_state {
1147 /* NOTATTACHED isn't in the USB spec, and this state acts
1148 * the same as ATTACHED ... but it's clearer this way.
1150 USB_STATE_NOTATTACHED = 0,
1152 /* chapter 9 and authentication (wireless) device states */
1154 USB_STATE_POWERED, /* wired */
1155 USB_STATE_RECONNECTING, /* auth */
1156 USB_STATE_UNAUTHENTICATED, /* auth */
1157 USB_STATE_DEFAULT, /* limited function */
1159 USB_STATE_CONFIGURED, /* most functions */
1163 /* NOTE: there are actually four different SUSPENDED
1164 * states, returning to POWERED, DEFAULT, ADDRESS, or
1165 * CONFIGURED respectively when SOF tokens flow again.
1166 * At this level there's no difference between L1 and L2
1167 * suspend states. (L2 being original USB 1.1 suspend.)
1171 enum usb3_link_state {
1179 * A U1 timeout of 0x0 means the parent hub will reject any transitions to U1.
1180 * 0xff means the parent hub will accept transitions to U1, but will not
1181 * initiate a transition.
1183 * A U1 timeout of 0x1 to 0x7F also causes the hub to initiate a transition to
1184 * U1 after that many microseconds. Timeouts of 0x80 to 0xFE are reserved
1187 * A U2 timeout of 0x0 means the parent hub will reject any transitions to U2.
1188 * 0xff means the parent hub will accept transitions to U2, but will not
1189 * initiate a transition.
1191 * A U2 timeout of 0x1 to 0xFE also causes the hub to initiate a transition to
1192 * U2 after N*256 microseconds. Therefore a U2 timeout value of 0x1 means a U2
1193 * idle timer of 256 microseconds, 0x2 means 512 microseconds, 0xFE means
1196 #define USB3_LPM_DISABLED 0x0
1197 #define USB3_LPM_U1_MAX_TIMEOUT 0x7F
1198 #define USB3_LPM_U2_MAX_TIMEOUT 0xFE
1199 #define USB3_LPM_DEVICE_INITIATED 0xFF
1201 struct usb_set_sel_req {
1206 } __attribute__ ((packed));
1209 * The Set System Exit Latency control transfer provides one byte each for
1210 * U1 SEL and U1 PEL, so the max exit latency is 0xFF. U2 SEL and U2 PEL each
1211 * are two bytes long.
1213 #define USB3_LPM_MAX_U1_SEL_PEL 0xFF
1214 #define USB3_LPM_MAX_U2_SEL_PEL 0xFFFF
1216 /*-------------------------------------------------------------------------*/
1219 * As per USB compliance update, a device that is actively drawing
1220 * more than 100mA from USB must report itself as bus-powered in
1221 * the GetStatus(DEVICE) call.
1222 * http://compliance.usb.org/index.asp?UpdateFile=Electrical&Format=Standard#34
1224 #define USB_SELF_POWER_VBUS_MAX_DRAW 100
1226 #endif /* _UAPI__LINUX_USB_CH9_H */