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 _UAPI__LINUX_USB_CH9_H
34 #define _UAPI__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 /* specific requests for USB Power Delivery */
109 #define USB_REQ_GET_PARTNER_PDO 20
110 #define USB_REQ_GET_BATTERY_STATUS 21
111 #define USB_REQ_SET_PDO 22
112 #define USB_REQ_GET_VDM 23
113 #define USB_REQ_SEND_VDM 24
115 /* The Link Power Management (LPM) ECN defines USB_REQ_TEST_AND_SET command,
116 * used by hubs to put ports into a new L1 suspend state, except that it
117 * forgot to define its number ...
121 * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
122 * are read as a bit array returned by USB_REQ_GET_STATUS. (So there
123 * are at most sixteen features of each type.) Hubs may also support a
124 * new USB_REQ_TEST_AND_SET_FEATURE to put ports into L1 suspend.
126 #define USB_DEVICE_SELF_POWERED 0 /* (read only) */
127 #define USB_DEVICE_REMOTE_WAKEUP 1 /* dev may initiate wakeup */
128 #define USB_DEVICE_TEST_MODE 2 /* (wired high speed only) */
129 #define USB_DEVICE_BATTERY 2 /* (wireless) */
130 #define USB_DEVICE_B_HNP_ENABLE 3 /* (otg) dev may initiate HNP */
131 #define USB_DEVICE_WUSB_DEVICE 3 /* (wireless)*/
132 #define USB_DEVICE_A_HNP_SUPPORT 4 /* (otg) RH port supports HNP */
133 #define USB_DEVICE_A_ALT_HNP_SUPPORT 5 /* (otg) other RH port does */
134 #define USB_DEVICE_DEBUG_MODE 6 /* (special devices only) */
137 * Test Mode Selectors
138 * See USB 2.0 spec Table 9-7
142 #define TEST_SE0_NAK 3
143 #define TEST_PACKET 4
144 #define TEST_FORCE_EN 5
147 * New Feature Selectors as added by USB 3.0
148 * See USB 3.0 spec Table 9-7
150 #define USB_DEVICE_U1_ENABLE 48 /* dev may initiate U1 transition */
151 #define USB_DEVICE_U2_ENABLE 49 /* dev may initiate U2 transition */
152 #define USB_DEVICE_LTM_ENABLE 50 /* dev may send LTM */
153 #define USB_INTRF_FUNC_SUSPEND 0 /* function suspend */
155 #define USB_INTR_FUNC_SUSPEND_OPT_MASK 0xFF00
157 * Suspend Options, Table 9-8 USB 3.0 spec
159 #define USB_INTRF_FUNC_SUSPEND_LP (1 << (8 + 0))
160 #define USB_INTRF_FUNC_SUSPEND_RW (1 << (8 + 1))
163 * Interface status, Figure 9-5 USB 3.0 spec
165 #define USB_INTRF_STAT_FUNC_RW_CAP 1
166 #define USB_INTRF_STAT_FUNC_RW 2
168 #define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */
170 /* Bit array elements as returned by the USB_REQ_GET_STATUS request. */
171 #define USB_DEV_STAT_U1_ENABLED 2 /* transition into U1 state */
172 #define USB_DEV_STAT_U2_ENABLED 3 /* transition into U2 state */
173 #define USB_DEV_STAT_LTM_ENABLED 4 /* Latency tolerance messages */
176 * Feature selectors from Table 9-8 USB Power Delivery spec
178 #define USB_DEVICE_BATTERY_WAKE_MASK 40
179 #define USB_DEVICE_OS_IS_PD_AWARE 41
180 #define USB_DEVICE_POLICY_MODE 42
181 #define USB_PORT_PR_SWAP 43
182 #define USB_PORT_GOTO_MIN 44
183 #define USB_PORT_RETURN_POWER 45
184 #define USB_PORT_ACCEPT_PD_REQUEST 46
185 #define USB_PORT_REJECT_PD_REQUEST 47
186 #define USB_PORT_PORT_PD_RESET 48
187 #define USB_PORT_C_PORT_PD_CHANGE 49
188 #define USB_PORT_CABLE_PD_RESET 50
189 #define USB_DEVICE_CHARGING_POLICY 54
192 * struct usb_ctrlrequest - SETUP data for a USB device control request
193 * @bRequestType: matches the USB bmRequestType field
194 * @bRequest: matches the USB bRequest field
195 * @wValue: matches the USB wValue field (le16 byte order)
196 * @wIndex: matches the USB wIndex field (le16 byte order)
197 * @wLength: matches the USB wLength field (le16 byte order)
199 * This structure is used to send control requests to a USB device. It matches
200 * the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the
201 * USB spec for a fuller description of the different fields, and what they are
204 * Note that the driver for any interface can issue control requests.
205 * For most devices, interfaces don't coordinate with each other, so
206 * such requests may be made at any time.
208 struct usb_ctrlrequest {
214 } __attribute__ ((packed));
216 /*-------------------------------------------------------------------------*/
219 * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
220 * (rarely) accepted by SET_DESCRIPTOR.
222 * Note that all multi-byte values here are encoded in little endian
223 * byte order "on the wire". Within the kernel and when exposed
224 * through the Linux-USB APIs, they are not converted to cpu byte
225 * order; it is the responsibility of the client code to do this.
226 * The single exception is when device and configuration descriptors (but
227 * not other descriptors) are read from usbfs (i.e. /proc/bus/usb/BBB/DDD);
228 * in this case the fields are converted to host endianness by the kernel.
232 * Descriptor types ... USB 2.0 spec table 9.5
234 #define USB_DT_DEVICE 0x01
235 #define USB_DT_CONFIG 0x02
236 #define USB_DT_STRING 0x03
237 #define USB_DT_INTERFACE 0x04
238 #define USB_DT_ENDPOINT 0x05
239 #define USB_DT_DEVICE_QUALIFIER 0x06
240 #define USB_DT_OTHER_SPEED_CONFIG 0x07
241 #define USB_DT_INTERFACE_POWER 0x08
242 /* these are from a minor usb 2.0 revision (ECN) */
243 #define USB_DT_OTG 0x09
244 #define USB_DT_DEBUG 0x0a
245 #define USB_DT_INTERFACE_ASSOCIATION 0x0b
246 /* these are from the Wireless USB spec */
247 #define USB_DT_SECURITY 0x0c
248 #define USB_DT_KEY 0x0d
249 #define USB_DT_ENCRYPTION_TYPE 0x0e
250 #define USB_DT_BOS 0x0f
251 #define USB_DT_DEVICE_CAPABILITY 0x10
252 #define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
253 #define USB_DT_WIRE_ADAPTER 0x21
254 #define USB_DT_RPIPE 0x22
255 #define USB_DT_CS_RADIO_CONTROL 0x23
256 /* From the T10 UAS specification */
257 #define USB_DT_PIPE_USAGE 0x24
258 /* From the USB 3.0 spec */
259 #define USB_DT_SS_ENDPOINT_COMP 0x30
260 /* From the USB 3.1 spec */
261 #define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
263 /* Conventional codes for class-specific descriptors. The convention is
264 * defined in the USB "Common Class" Spec (3.11). Individual class specs
265 * are authoritative for their usage, not the "common class" writeup.
267 #define USB_DT_CS_DEVICE (USB_TYPE_CLASS | USB_DT_DEVICE)
268 #define USB_DT_CS_CONFIG (USB_TYPE_CLASS | USB_DT_CONFIG)
269 #define USB_DT_CS_STRING (USB_TYPE_CLASS | USB_DT_STRING)
270 #define USB_DT_CS_INTERFACE (USB_TYPE_CLASS | USB_DT_INTERFACE)
271 #define USB_DT_CS_ENDPOINT (USB_TYPE_CLASS | USB_DT_ENDPOINT)
273 /* All standard descriptors have these 2 fields at the beginning */
274 struct usb_descriptor_header {
276 __u8 bDescriptorType;
277 } __attribute__ ((packed));
280 /*-------------------------------------------------------------------------*/
282 /* USB_DT_DEVICE: Device descriptor */
283 struct usb_device_descriptor {
285 __u8 bDescriptorType;
289 __u8 bDeviceSubClass;
290 __u8 bDeviceProtocol;
291 __u8 bMaxPacketSize0;
298 __u8 bNumConfigurations;
299 } __attribute__ ((packed));
301 #define USB_DT_DEVICE_SIZE 18
305 * Device and/or Interface Class codes
306 * as found in bDeviceClass or bInterfaceClass
307 * and defined by www.usb.org documents
309 #define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
310 #define USB_CLASS_AUDIO 1
311 #define USB_CLASS_COMM 2
312 #define USB_CLASS_HID 3
313 #define USB_CLASS_PHYSICAL 5
314 #define USB_CLASS_STILL_IMAGE 6
315 #define USB_CLASS_PRINTER 7
316 #define USB_CLASS_MASS_STORAGE 8
317 #define USB_CLASS_HUB 9
318 #define USB_CLASS_CDC_DATA 0x0a
319 #define USB_CLASS_CSCID 0x0b /* chip+ smart card */
320 #define USB_CLASS_CONTENT_SEC 0x0d /* content security */
321 #define USB_CLASS_VIDEO 0x0e
322 #define USB_CLASS_WIRELESS_CONTROLLER 0xe0
323 #define USB_CLASS_MISC 0xef
324 #define USB_CLASS_APP_SPEC 0xfe
325 #define USB_CLASS_VENDOR_SPEC 0xff
327 #define USB_SUBCLASS_VENDOR_SPEC 0xff
329 /*-------------------------------------------------------------------------*/
331 /* USB_DT_CONFIG: Configuration descriptor information.
333 * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
334 * descriptor type is different. Highspeed-capable devices can look
335 * different depending on what speed they're currently running. Only
336 * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
339 struct usb_config_descriptor {
341 __u8 bDescriptorType;
345 __u8 bConfigurationValue;
349 } __attribute__ ((packed));
351 #define USB_DT_CONFIG_SIZE 9
353 /* from config descriptor bmAttributes */
354 #define USB_CONFIG_ATT_ONE (1 << 7) /* must be set */
355 #define USB_CONFIG_ATT_SELFPOWER (1 << 6) /* self powered */
356 #define USB_CONFIG_ATT_WAKEUP (1 << 5) /* can wakeup */
357 #define USB_CONFIG_ATT_BATTERY (1 << 4) /* battery powered */
359 /*-------------------------------------------------------------------------*/
361 /* USB String descriptors can contain at most 126 characters. */
362 #define USB_MAX_STRING_LEN 126
364 /* USB_DT_STRING: String descriptor */
365 struct usb_string_descriptor {
367 __u8 bDescriptorType;
369 __le16 wData[1]; /* UTF-16LE encoded */
370 } __attribute__ ((packed));
372 /* note that "string" zero is special, it holds language codes that
373 * the device supports, not Unicode characters.
376 /*-------------------------------------------------------------------------*/
378 /* USB_DT_INTERFACE: Interface descriptor */
379 struct usb_interface_descriptor {
381 __u8 bDescriptorType;
383 __u8 bInterfaceNumber;
384 __u8 bAlternateSetting;
386 __u8 bInterfaceClass;
387 __u8 bInterfaceSubClass;
388 __u8 bInterfaceProtocol;
390 } __attribute__ ((packed));
392 #define USB_DT_INTERFACE_SIZE 9
394 /*-------------------------------------------------------------------------*/
396 /* USB_DT_ENDPOINT: Endpoint descriptor */
397 struct usb_endpoint_descriptor {
399 __u8 bDescriptorType;
401 __u8 bEndpointAddress;
403 __le16 wMaxPacketSize;
406 /* NOTE: these two are _only_ in audio endpoints. */
407 /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */
410 } __attribute__ ((packed));
412 #define USB_DT_ENDPOINT_SIZE 7
413 #define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
419 #define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */
420 #define USB_ENDPOINT_DIR_MASK 0x80
422 #define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */
423 #define USB_ENDPOINT_XFER_CONTROL 0
424 #define USB_ENDPOINT_XFER_ISOC 1
425 #define USB_ENDPOINT_XFER_BULK 2
426 #define USB_ENDPOINT_XFER_INT 3
427 #define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
429 #define USB_EP_MAXP_MULT_SHIFT 11
430 #define USB_EP_MAXP_MULT_MASK (3 << USB_EP_MAXP_MULT_SHIFT)
431 #define USB_EP_MAXP_MULT(m) \
432 (((m) & USB_EP_MAXP_MULT_MASK) >> USB_EP_MAXP_MULT_SHIFT)
434 /* The USB 3.0 spec redefines bits 5:4 of bmAttributes as interrupt ep type. */
435 #define USB_ENDPOINT_INTRTYPE 0x30
436 #define USB_ENDPOINT_INTR_PERIODIC (0 << 4)
437 #define USB_ENDPOINT_INTR_NOTIFICATION (1 << 4)
439 #define USB_ENDPOINT_SYNCTYPE 0x0c
440 #define USB_ENDPOINT_SYNC_NONE (0 << 2)
441 #define USB_ENDPOINT_SYNC_ASYNC (1 << 2)
442 #define USB_ENDPOINT_SYNC_ADAPTIVE (2 << 2)
443 #define USB_ENDPOINT_SYNC_SYNC (3 << 2)
445 #define USB_ENDPOINT_USAGE_MASK 0x30
446 #define USB_ENDPOINT_USAGE_DATA 0x00
447 #define USB_ENDPOINT_USAGE_FEEDBACK 0x10
448 #define USB_ENDPOINT_USAGE_IMPLICIT_FB 0x20 /* Implicit feedback Data endpoint */
450 /*-------------------------------------------------------------------------*/
453 * usb_endpoint_num - get the endpoint's number
454 * @epd: endpoint to be checked
456 * Returns @epd's number: 0 to 15.
458 static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
460 return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
464 * usb_endpoint_type - get the endpoint's transfer type
465 * @epd: endpoint to be checked
467 * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
468 * to @epd's transfer type.
470 static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
472 return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
476 * usb_endpoint_dir_in - check if the endpoint has IN direction
477 * @epd: endpoint to be checked
479 * Returns true if the endpoint is of type IN, otherwise it returns false.
481 static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
483 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN);
487 * usb_endpoint_dir_out - check if the endpoint has OUT direction
488 * @epd: endpoint to be checked
490 * Returns true if the endpoint is of type OUT, otherwise it returns false.
492 static inline int usb_endpoint_dir_out(
493 const struct usb_endpoint_descriptor *epd)
495 return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT);
499 * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type
500 * @epd: endpoint to be checked
502 * Returns true if the endpoint is of type bulk, otherwise it returns false.
504 static inline int usb_endpoint_xfer_bulk(
505 const struct usb_endpoint_descriptor *epd)
507 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
508 USB_ENDPOINT_XFER_BULK);
512 * usb_endpoint_xfer_control - check if the endpoint has control transfer type
513 * @epd: endpoint to be checked
515 * Returns true if the endpoint is of type control, otherwise it returns false.
517 static inline int usb_endpoint_xfer_control(
518 const struct usb_endpoint_descriptor *epd)
520 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
521 USB_ENDPOINT_XFER_CONTROL);
525 * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type
526 * @epd: endpoint to be checked
528 * Returns true if the endpoint is of type interrupt, otherwise it returns
531 static inline int usb_endpoint_xfer_int(
532 const struct usb_endpoint_descriptor *epd)
534 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
535 USB_ENDPOINT_XFER_INT);
539 * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type
540 * @epd: endpoint to be checked
542 * Returns true if the endpoint is of type isochronous, otherwise it returns
545 static inline int usb_endpoint_xfer_isoc(
546 const struct usb_endpoint_descriptor *epd)
548 return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
549 USB_ENDPOINT_XFER_ISOC);
553 * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN
554 * @epd: endpoint to be checked
556 * Returns true if the endpoint has bulk transfer type and IN direction,
557 * otherwise it returns false.
559 static inline int usb_endpoint_is_bulk_in(
560 const struct usb_endpoint_descriptor *epd)
562 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd);
566 * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT
567 * @epd: endpoint to be checked
569 * Returns true if the endpoint has bulk transfer type and OUT direction,
570 * otherwise it returns false.
572 static inline int usb_endpoint_is_bulk_out(
573 const struct usb_endpoint_descriptor *epd)
575 return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd);
579 * usb_endpoint_is_int_in - check if the endpoint is interrupt IN
580 * @epd: endpoint to be checked
582 * Returns true if the endpoint has interrupt transfer type and IN direction,
583 * otherwise it returns false.
585 static inline int usb_endpoint_is_int_in(
586 const struct usb_endpoint_descriptor *epd)
588 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd);
592 * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT
593 * @epd: endpoint to be checked
595 * Returns true if the endpoint has interrupt transfer type and OUT direction,
596 * otherwise it returns false.
598 static inline int usb_endpoint_is_int_out(
599 const struct usb_endpoint_descriptor *epd)
601 return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd);
605 * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN
606 * @epd: endpoint to be checked
608 * Returns true if the endpoint has isochronous transfer type and IN direction,
609 * otherwise it returns false.
611 static inline int usb_endpoint_is_isoc_in(
612 const struct usb_endpoint_descriptor *epd)
614 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd);
618 * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT
619 * @epd: endpoint to be checked
621 * Returns true if the endpoint has isochronous transfer type and OUT direction,
622 * otherwise it returns false.
624 static inline int usb_endpoint_is_isoc_out(
625 const struct usb_endpoint_descriptor *epd)
627 return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd);
631 * usb_endpoint_maxp - get endpoint's max packet size
632 * @epd: endpoint to be checked
634 * Returns @epd's max packet
636 static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd)
638 return __le16_to_cpu(epd->wMaxPacketSize);
642 * usb_endpoint_maxp_mult - get endpoint's transactional opportunities
643 * @epd: endpoint to be checked
645 * Return @epd's wMaxPacketSize[12:11] + 1
648 usb_endpoint_maxp_mult(const struct usb_endpoint_descriptor *epd)
650 int maxp = __le16_to_cpu(epd->wMaxPacketSize);
652 return USB_EP_MAXP_MULT(maxp) + 1;
655 static inline int usb_endpoint_interrupt_type(
656 const struct usb_endpoint_descriptor *epd)
658 return epd->bmAttributes & USB_ENDPOINT_INTRTYPE;
661 /*-------------------------------------------------------------------------*/
663 /* USB_DT_SSP_ISOC_ENDPOINT_COMP: SuperSpeedPlus Isochronous Endpoint Companion
666 struct usb_ssp_isoc_ep_comp_descriptor {
668 __u8 bDescriptorType;
670 __le32 dwBytesPerInterval;
671 } __attribute__ ((packed));
673 #define USB_DT_SSP_ISOC_EP_COMP_SIZE 8
675 /*-------------------------------------------------------------------------*/
677 /* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
678 struct usb_ss_ep_comp_descriptor {
680 __u8 bDescriptorType;
684 __le16 wBytesPerInterval;
685 } __attribute__ ((packed));
687 #define USB_DT_SS_EP_COMP_SIZE 6
689 /* Bits 4:0 of bmAttributes if this is a bulk endpoint */
691 usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp)
698 max_streams = comp->bmAttributes & 0x1f;
703 max_streams = 1 << max_streams;
708 /* Bits 1:0 of bmAttributes if this is an isoc endpoint */
709 #define USB_SS_MULT(p) (1 + ((p) & 0x3))
710 /* Bit 7 of bmAttributes if a SSP isoc endpoint companion descriptor exists */
711 #define USB_SS_SSP_ISOC_COMP(p) ((p) & (1 << 7))
713 /*-------------------------------------------------------------------------*/
715 /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
716 struct usb_qualifier_descriptor {
718 __u8 bDescriptorType;
722 __u8 bDeviceSubClass;
723 __u8 bDeviceProtocol;
724 __u8 bMaxPacketSize0;
725 __u8 bNumConfigurations;
727 } __attribute__ ((packed));
730 /*-------------------------------------------------------------------------*/
732 /* USB_DT_OTG (from OTG 1.0a supplement) */
733 struct usb_otg_descriptor {
735 __u8 bDescriptorType;
737 __u8 bmAttributes; /* support for HNP, SRP, etc */
738 } __attribute__ ((packed));
740 /* USB_DT_OTG (from OTG 2.0 supplement) */
741 struct usb_otg20_descriptor {
743 __u8 bDescriptorType;
745 __u8 bmAttributes; /* support for HNP, SRP and ADP, etc */
746 __le16 bcdOTG; /* OTG and EH supplement release number
747 * in binary-coded decimal(i.e. 2.0 is 0200H)
749 } __attribute__ ((packed));
751 /* from usb_otg_descriptor.bmAttributes */
752 #define USB_OTG_SRP (1 << 0)
753 #define USB_OTG_HNP (1 << 1) /* swap host/device roles */
754 #define USB_OTG_ADP (1 << 2) /* support ADP */
756 #define OTG_STS_SELECTOR 0xF000 /* OTG status selector */
757 /*-------------------------------------------------------------------------*/
759 /* USB_DT_DEBUG: for special highspeed devices, replacing serial console */
760 struct usb_debug_descriptor {
762 __u8 bDescriptorType;
764 /* bulk endpoints with 8 byte maxpacket */
765 __u8 bDebugInEndpoint;
766 __u8 bDebugOutEndpoint;
767 } __attribute__((packed));
769 /*-------------------------------------------------------------------------*/
771 /* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */
772 struct usb_interface_assoc_descriptor {
774 __u8 bDescriptorType;
776 __u8 bFirstInterface;
777 __u8 bInterfaceCount;
779 __u8 bFunctionSubClass;
780 __u8 bFunctionProtocol;
782 } __attribute__ ((packed));
784 #define USB_DT_INTERFACE_ASSOCIATION_SIZE 8
786 /*-------------------------------------------------------------------------*/
788 /* USB_DT_SECURITY: group of wireless security descriptors, including
789 * encryption types available for setting up a CC/association.
791 struct usb_security_descriptor {
793 __u8 bDescriptorType;
796 __u8 bNumEncryptionTypes;
797 } __attribute__((packed));
799 /*-------------------------------------------------------------------------*/
801 /* USB_DT_KEY: used with {GET,SET}_SECURITY_DATA; only public keys
804 struct usb_key_descriptor {
806 __u8 bDescriptorType;
811 } __attribute__((packed));
813 /*-------------------------------------------------------------------------*/
815 /* USB_DT_ENCRYPTION_TYPE: bundled in DT_SECURITY groups */
816 struct usb_encryption_descriptor {
818 __u8 bDescriptorType;
820 __u8 bEncryptionType;
821 #define USB_ENC_TYPE_UNSECURE 0
822 #define USB_ENC_TYPE_WIRED 1 /* non-wireless mode */
823 #define USB_ENC_TYPE_CCM_1 2 /* aes128/cbc session */
824 #define USB_ENC_TYPE_RSA_1 3 /* rsa3072/sha1 auth */
825 __u8 bEncryptionValue; /* use in SET_ENCRYPTION */
827 } __attribute__((packed));
830 /*-------------------------------------------------------------------------*/
832 /* USB_DT_BOS: group of device-level capabilities */
833 struct usb_bos_descriptor {
835 __u8 bDescriptorType;
839 } __attribute__((packed));
841 #define USB_DT_BOS_SIZE 5
842 /*-------------------------------------------------------------------------*/
844 /* USB_DT_DEVICE_CAPABILITY: grouped with BOS */
845 struct usb_dev_cap_header {
847 __u8 bDescriptorType;
848 __u8 bDevCapabilityType;
849 } __attribute__((packed));
851 #define USB_CAP_TYPE_WIRELESS_USB 1
853 struct usb_wireless_cap_descriptor { /* Ultra Wide Band */
855 __u8 bDescriptorType;
856 __u8 bDevCapabilityType;
859 #define USB_WIRELESS_P2P_DRD (1 << 1)
860 #define USB_WIRELESS_BEACON_MASK (3 << 2)
861 #define USB_WIRELESS_BEACON_SELF (1 << 2)
862 #define USB_WIRELESS_BEACON_DIRECTED (2 << 2)
863 #define USB_WIRELESS_BEACON_NONE (3 << 2)
864 __le16 wPHYRates; /* bit rates, Mbps */
865 #define USB_WIRELESS_PHY_53 (1 << 0) /* always set */
866 #define USB_WIRELESS_PHY_80 (1 << 1)
867 #define USB_WIRELESS_PHY_107 (1 << 2) /* always set */
868 #define USB_WIRELESS_PHY_160 (1 << 3)
869 #define USB_WIRELESS_PHY_200 (1 << 4) /* always set */
870 #define USB_WIRELESS_PHY_320 (1 << 5)
871 #define USB_WIRELESS_PHY_400 (1 << 6)
872 #define USB_WIRELESS_PHY_480 (1 << 7)
873 __u8 bmTFITXPowerInfo; /* TFI power levels */
874 __u8 bmFFITXPowerInfo; /* FFI power levels */
877 } __attribute__((packed));
879 #define USB_DT_USB_WIRELESS_CAP_SIZE 11
881 /* USB 2.0 Extension descriptor */
882 #define USB_CAP_TYPE_EXT 2
884 struct usb_ext_cap_descriptor { /* Link Power Management */
886 __u8 bDescriptorType;
887 __u8 bDevCapabilityType;
889 #define USB_LPM_SUPPORT (1 << 1) /* supports LPM */
890 #define USB_BESL_SUPPORT (1 << 2) /* supports BESL */
891 #define USB_BESL_BASELINE_VALID (1 << 3) /* Baseline BESL valid*/
892 #define USB_BESL_DEEP_VALID (1 << 4) /* Deep BESL valid */
893 #define USB_GET_BESL_BASELINE(p) (((p) & (0xf << 8)) >> 8)
894 #define USB_GET_BESL_DEEP(p) (((p) & (0xf << 12)) >> 12)
895 } __attribute__((packed));
897 #define USB_DT_USB_EXT_CAP_SIZE 7
900 * SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB
901 * specific device level capabilities
903 #define USB_SS_CAP_TYPE 3
904 struct usb_ss_cap_descriptor { /* Link Power Management */
906 __u8 bDescriptorType;
907 __u8 bDevCapabilityType;
909 #define USB_LTM_SUPPORT (1 << 1) /* supports LTM */
910 __le16 wSpeedSupported;
911 #define USB_LOW_SPEED_OPERATION (1) /* Low speed operation */
912 #define USB_FULL_SPEED_OPERATION (1 << 1) /* Full speed operation */
913 #define USB_HIGH_SPEED_OPERATION (1 << 2) /* High speed operation */
914 #define USB_5GBPS_OPERATION (1 << 3) /* Operation at 5Gbps */
915 __u8 bFunctionalitySupport;
917 __le16 bU2DevExitLat;
918 } __attribute__((packed));
920 #define USB_DT_USB_SS_CAP_SIZE 10
923 * Container ID Capability descriptor: Defines the instance unique ID used to
924 * identify the instance across all operating modes
926 #define CONTAINER_ID_TYPE 4
927 struct usb_ss_container_id_descriptor {
929 __u8 bDescriptorType;
930 __u8 bDevCapabilityType;
932 __u8 ContainerID[16]; /* 128-bit number */
933 } __attribute__((packed));
935 #define USB_DT_USB_SS_CONTN_ID_SIZE 20
938 * SuperSpeed Plus USB Capability descriptor: Defines the set of
939 * SuperSpeed Plus USB specific device level capabilities
941 #define USB_SSP_CAP_TYPE 0xa
942 struct usb_ssp_cap_descriptor {
944 __u8 bDescriptorType;
945 __u8 bDevCapabilityType;
948 #define USB_SSP_SUBLINK_SPEED_ATTRIBS (0x1f << 0) /* sublink speed entries */
949 #define USB_SSP_SUBLINK_SPEED_IDS (0xf << 5) /* speed ID entries */
950 __le16 wFunctionalitySupport;
951 #define USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID (0xf)
952 #define USB_SSP_MIN_RX_LANE_COUNT (0xf << 8)
953 #define USB_SSP_MIN_TX_LANE_COUNT (0xf << 12)
955 __le32 bmSublinkSpeedAttr[1]; /* list of sublink speed attrib entries */
956 #define USB_SSP_SUBLINK_SPEED_SSID (0xf) /* sublink speed ID */
957 #define USB_SSP_SUBLINK_SPEED_LSE (0x3 << 4) /* Lanespeed exponent */
958 #define USB_SSP_SUBLINK_SPEED_ST (0x3 << 6) /* Sublink type */
959 #define USB_SSP_SUBLINK_SPEED_RSVD (0x3f << 8) /* Reserved */
960 #define USB_SSP_SUBLINK_SPEED_LP (0x3 << 14) /* Link protocol */
961 #define USB_SSP_SUBLINK_SPEED_LSM (0xff << 16) /* Lanespeed mantissa */
962 } __attribute__((packed));
965 * USB Power Delivery Capability Descriptor:
966 * Defines capabilities for PD
968 /* Defines the various PD Capabilities of this device */
969 #define USB_PD_POWER_DELIVERY_CAPABILITY 0x06
970 /* Provides information on each battery supported by the device */
971 #define USB_PD_BATTERY_INFO_CAPABILITY 0x07
972 /* The Consumer characteristics of a Port on the device */
973 #define USB_PD_PD_CONSUMER_PORT_CAPABILITY 0x08
974 /* The provider characteristics of a Port on the device */
975 #define USB_PD_PD_PROVIDER_PORT_CAPABILITY 0x09
977 struct usb_pd_cap_descriptor {
979 __u8 bDescriptorType;
980 __u8 bDevCapabilityType; /* set to USB_PD_POWER_DELIVERY_CAPABILITY */
983 #define USB_PD_CAP_BATTERY_CHARGING (1 << 1) /* supports Battery Charging specification */
984 #define USB_PD_CAP_USB_PD (1 << 2) /* supports USB Power Delivery specification */
985 #define USB_PD_CAP_PROVIDER (1 << 3) /* can provide power */
986 #define USB_PD_CAP_CONSUMER (1 << 4) /* can consume power */
987 #define USB_PD_CAP_CHARGING_POLICY (1 << 5) /* supports CHARGING_POLICY feature */
988 #define USB_PD_CAP_TYPE_C_CURRENT (1 << 6) /* supports power capabilities defined in the USB Type-C Specification */
990 #define USB_PD_CAP_PWR_AC (1 << 8)
991 #define USB_PD_CAP_PWR_BAT (1 << 9)
992 #define USB_PD_CAP_PWR_USE_V_BUS (1 << 14)
994 __le16 bmProviderPorts; /* Bit zero refers to the UFP of the device */
995 __le16 bmConsumerPorts;
998 __le16 bcdUSBTypeCVersion;
999 } __attribute__((packed));
1001 struct usb_pd_cap_battery_info_descriptor {
1003 __u8 bDescriptorType;
1004 __u8 bDevCapabilityType;
1005 /* Index of string descriptor shall contain the user friendly name for this battery */
1007 /* Index of string descriptor shall contain the Serial Number String for this battery */
1010 __u8 bBatteryId; /* uniquely identifies this battery in status Messages */
1013 * Shall contain the Battery Charge value above which this
1014 * battery is considered to be fully charged but not necessarily
1017 __le32 dwChargedThreshold; /* in mWh */
1019 * Shall contain the minimum charge level of this battery such
1020 * that above this threshold, a device can be assured of being
1021 * able to power up successfully (see Battery Charging 1.2).
1023 __le32 dwWeakThreshold; /* in mWh */
1024 __le32 dwBatteryDesignCapacity; /* in mWh */
1025 __le32 dwBatteryLastFullchargeCapacity; /* in mWh */
1026 } __attribute__((packed));
1028 struct usb_pd_cap_consumer_port_descriptor {
1030 __u8 bDescriptorType;
1031 __u8 bDevCapabilityType;
1033 __u8 bmCapabilities;
1034 /* port will oerate under: */
1035 #define USB_PD_CAP_CONSUMER_BC (1 << 0) /* BC */
1036 #define USB_PD_CAP_CONSUMER_PD (1 << 1) /* PD */
1037 #define USB_PD_CAP_CONSUMER_TYPE_C (1 << 2) /* USB Type-C Current */
1038 __le16 wMinVoltage; /* in 50mV units */
1039 __le16 wMaxVoltage; /* in 50mV units */
1041 __le32 dwMaxOperatingPower; /* in 10 mW - operating at steady state */
1042 __le32 dwMaxPeakPower; /* in 10mW units - operating at peak power */
1043 __le32 dwMaxPeakPowerTime; /* in 100ms units - duration of peak */
1044 #define USB_PD_CAP_CONSUMER_UNKNOWN_PEAK_POWER_TIME 0xffff
1045 } __attribute__((packed));
1047 struct usb_pd_cap_provider_port_descriptor {
1049 __u8 bDescriptorType;
1050 __u8 bDevCapabilityType;
1052 __u8 bmCapabilities;
1053 /* port will oerate under: */
1054 #define USB_PD_CAP_PROVIDER_BC (1 << 0) /* BC */
1055 #define USB_PD_CAP_PROVIDER_PD (1 << 1) /* PD */
1056 #define USB_PD_CAP_PROVIDER_TYPE_C (1 << 2) /* USB Type-C Current */
1057 __u8 bNumOfPDObjects;
1059 __le32 wPowerDataObject[];
1060 } __attribute__((packed));
1063 * Precision time measurement capability descriptor: advertised by devices and
1064 * hubs that support PTM
1066 #define USB_PTM_CAP_TYPE 0xb
1067 struct usb_ptm_cap_descriptor {
1069 __u8 bDescriptorType;
1070 __u8 bDevCapabilityType;
1071 } __attribute__((packed));
1073 #define USB_DT_USB_PTM_ID_SIZE 3
1075 * The size of the descriptor for the Sublink Speed Attribute Count
1076 * (SSAC) specified in bmAttributes[4:0].
1078 #define USB_DT_USB_SSP_CAP_SIZE(ssac) (16 + ssac * 4)
1080 /*-------------------------------------------------------------------------*/
1082 /* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with
1083 * each endpoint descriptor for a wireless device
1085 struct usb_wireless_ep_comp_descriptor {
1087 __u8 bDescriptorType;
1091 __le16 wMaxStreamDelay;
1092 __le16 wOverTheAirPacketSize;
1093 __u8 bOverTheAirInterval;
1094 __u8 bmCompAttributes;
1095 #define USB_ENDPOINT_SWITCH_MASK 0x03 /* in bmCompAttributes */
1096 #define USB_ENDPOINT_SWITCH_NO 0
1097 #define USB_ENDPOINT_SWITCH_SWITCH 1
1098 #define USB_ENDPOINT_SWITCH_SCALE 2
1099 } __attribute__((packed));
1101 /*-------------------------------------------------------------------------*/
1103 /* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
1104 * host and a device for connection set up, mutual authentication, and
1105 * exchanging short lived session keys. The handshake depends on a CC.
1107 struct usb_handshake {
1108 __u8 bMessageNumber;
1115 } __attribute__((packed));
1117 /*-------------------------------------------------------------------------*/
1119 /* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
1120 * A CC may also be set up using non-wireless secure channels (including
1121 * wired USB!), and some devices may support CCs with multiple hosts.
1123 struct usb_connection_context {
1124 __u8 CHID[16]; /* persistent host id */
1125 __u8 CDID[16]; /* device id (unique w/in host context) */
1126 __u8 CK[16]; /* connection key */
1127 } __attribute__((packed));
1129 /*-------------------------------------------------------------------------*/
1131 /* USB 2.0 defines three speeds, here's how Linux identifies them */
1133 enum usb_device_speed {
1134 USB_SPEED_UNKNOWN = 0, /* enumerating */
1135 USB_SPEED_LOW, USB_SPEED_FULL, /* usb 1.1 */
1136 USB_SPEED_HIGH, /* usb 2.0 */
1137 USB_SPEED_WIRELESS, /* wireless (usb 2.5) */
1138 USB_SPEED_SUPER, /* usb 3.0 */
1139 USB_SPEED_SUPER_PLUS, /* usb 3.1 */
1143 enum usb_device_state {
1144 /* NOTATTACHED isn't in the USB spec, and this state acts
1145 * the same as ATTACHED ... but it's clearer this way.
1147 USB_STATE_NOTATTACHED = 0,
1149 /* chapter 9 and authentication (wireless) device states */
1151 USB_STATE_POWERED, /* wired */
1152 USB_STATE_RECONNECTING, /* auth */
1153 USB_STATE_UNAUTHENTICATED, /* auth */
1154 USB_STATE_DEFAULT, /* limited function */
1156 USB_STATE_CONFIGURED, /* most functions */
1160 /* NOTE: there are actually four different SUSPENDED
1161 * states, returning to POWERED, DEFAULT, ADDRESS, or
1162 * CONFIGURED respectively when SOF tokens flow again.
1163 * At this level there's no difference between L1 and L2
1164 * suspend states. (L2 being original USB 1.1 suspend.)
1168 enum usb3_link_state {
1176 * A U1 timeout of 0x0 means the parent hub will reject any transitions to U1.
1177 * 0xff means the parent hub will accept transitions to U1, but will not
1178 * initiate a transition.
1180 * A U1 timeout of 0x1 to 0x7F also causes the hub to initiate a transition to
1181 * U1 after that many microseconds. Timeouts of 0x80 to 0xFE are reserved
1184 * A U2 timeout of 0x0 means the parent hub will reject any transitions to U2.
1185 * 0xff means the parent hub will accept transitions to U2, but will not
1186 * initiate a transition.
1188 * A U2 timeout of 0x1 to 0xFE also causes the hub to initiate a transition to
1189 * U2 after N*256 microseconds. Therefore a U2 timeout value of 0x1 means a U2
1190 * idle timer of 256 microseconds, 0x2 means 512 microseconds, 0xFE means
1193 #define USB3_LPM_DISABLED 0x0
1194 #define USB3_LPM_U1_MAX_TIMEOUT 0x7F
1195 #define USB3_LPM_U2_MAX_TIMEOUT 0xFE
1196 #define USB3_LPM_DEVICE_INITIATED 0xFF
1198 struct usb_set_sel_req {
1203 } __attribute__ ((packed));
1206 * The Set System Exit Latency control transfer provides one byte each for
1207 * U1 SEL and U1 PEL, so the max exit latency is 0xFF. U2 SEL and U2 PEL each
1208 * are two bytes long.
1210 #define USB3_LPM_MAX_U1_SEL_PEL 0xFF
1211 #define USB3_LPM_MAX_U2_SEL_PEL 0xFFFF
1213 /*-------------------------------------------------------------------------*/
1216 * As per USB compliance update, a device that is actively drawing
1217 * more than 100mA from USB must report itself as bus-powered in
1218 * the GetStatus(DEVICE) call.
1219 * http://compliance.usb.org/index.asp?UpdateFile=Electrical&Format=Standard#34
1221 #define USB_SELF_POWER_VBUS_MAX_DRAW 100
1223 #endif /* _UAPI__LINUX_USB_CH9_H */