Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
672027a3 IPG |
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 | |
6 | * need these: | |
1da177e4 LT |
7 | * |
8 | * - the master/host side Linux-USB kernel driver API; | |
9 | * - the "usbfs" user space API; and | |
5da0106f | 10 | * - the Linux "gadget" slave/device/peripheral side driver API. |
1da177e4 LT |
11 | * |
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 | |
5da0106f DB |
14 | * the master and slave side APIs benefit from working well together. |
15 | * | |
16 | * There's also "Wireless USB", using low power short range radios for | |
17 | * peripheral interconnection but otherwise building on the USB framework. | |
672027a3 IPG |
18 | * |
19 | * Note all descriptors are declared '__attribute__((packed))' so that: | |
20 | * | |
21 | * [a] they never get padded, either internally (USB spec writers | |
22 | * probably handled that) or externally; | |
23 | * | |
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 | |
27 | * | |
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. | |
1da177e4 LT |
31 | */ |
32 | ||
33 | #ifndef __LINUX_USB_CH9_H | |
34 | #define __LINUX_USB_CH9_H | |
35 | ||
4cceb4d1 | 36 | #include <linux/types.h> /* __u8 etc */ |
939f325f | 37 | #include <asm/byteorder.h> /* le16_to_cpu */ |
1da177e4 LT |
38 | |
39 | /*-------------------------------------------------------------------------*/ | |
40 | ||
41 | /* CONTROL REQUEST SUPPORT */ | |
42 | ||
43 | /* | |
44 | * USB directions | |
45 | * | |
46 | * This bit flag is used in endpoint descriptors' bEndpointAddress field. | |
47 | * It's also one of three fields in control requests bRequestType. | |
48 | */ | |
49 | #define USB_DIR_OUT 0 /* to device */ | |
50 | #define USB_DIR_IN 0x80 /* to host */ | |
51 | ||
52 | /* | |
53 | * USB types, the second of three bRequestType fields | |
54 | */ | |
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) | |
60 | ||
61 | /* | |
62 | * USB recipients, the third of three bRequestType fields | |
63 | */ | |
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 | |
5b5daf77 | 69 | /* From Wireless USB 1.0 */ |
dbe0dbb7 DB |
70 | #define USB_RECIP_PORT 0x04 |
71 | #define USB_RECIP_RPIPE 0x05 | |
1da177e4 LT |
72 | |
73 | /* | |
74 | * Standard requests, for the bRequest field of a SETUP packet. | |
75 | * | |
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. | |
79 | */ | |
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 | ||
5da0106f DB |
92 | #define USB_REQ_SET_ENCRYPTION 0x0D /* Wireless USB */ |
93 | #define USB_REQ_GET_ENCRYPTION 0x0E | |
5b5daf77 | 94 | #define USB_REQ_RPIPE_ABORT 0x0E |
5da0106f | 95 | #define USB_REQ_SET_HANDSHAKE 0x0F |
5b5daf77 | 96 | #define USB_REQ_RPIPE_RESET 0x0F |
5da0106f DB |
97 | #define USB_REQ_GET_HANDSHAKE 0x10 |
98 | #define USB_REQ_SET_CONNECTION 0x11 | |
99 | #define USB_REQ_SET_SECURITY_DATA 0x12 | |
100 | #define USB_REQ_GET_SECURITY_DATA 0x13 | |
101 | #define USB_REQ_SET_WUSB_DATA 0x14 | |
102 | #define USB_REQ_LOOPBACK_DATA_WRITE 0x15 | |
103 | #define USB_REQ_LOOPBACK_DATA_READ 0x16 | |
104 | #define USB_REQ_SET_INTERFACE_DS 0x17 | |
105 | ||
64a3a25f | 106 | /* The Link Power Management (LPM) ECN defines USB_REQ_TEST_AND_SET command, |
dbe0dbb7 DB |
107 | * used by hubs to put ports into a new L1 suspend state, except that it |
108 | * forgot to define its number ... | |
109 | */ | |
110 | ||
1da177e4 LT |
111 | /* |
112 | * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and | |
113 | * are read as a bit array returned by USB_REQ_GET_STATUS. (So there | |
dbe0dbb7 DB |
114 | * are at most sixteen features of each type.) Hubs may also support a |
115 | * new USB_REQ_TEST_AND_SET_FEATURE to put ports into L1 suspend. | |
1da177e4 LT |
116 | */ |
117 | #define USB_DEVICE_SELF_POWERED 0 /* (read only) */ | |
118 | #define USB_DEVICE_REMOTE_WAKEUP 1 /* dev may initiate wakeup */ | |
5da0106f DB |
119 | #define USB_DEVICE_TEST_MODE 2 /* (wired high speed only) */ |
120 | #define USB_DEVICE_BATTERY 2 /* (wireless) */ | |
121 | #define USB_DEVICE_B_HNP_ENABLE 3 /* (otg) dev may initiate HNP */ | |
122 | #define USB_DEVICE_WUSB_DEVICE 3 /* (wireless)*/ | |
123 | #define USB_DEVICE_A_HNP_SUPPORT 4 /* (otg) RH port supports HNP */ | |
124 | #define USB_DEVICE_A_ALT_HNP_SUPPORT 5 /* (otg) other RH port does */ | |
1da177e4 LT |
125 | #define USB_DEVICE_DEBUG_MODE 6 /* (special devices only) */ |
126 | ||
7fc56f0d LA |
127 | /* |
128 | * Test Mode Selectors | |
129 | * See USB 2.0 spec Table 9-7 | |
130 | */ | |
131 | #define TEST_J 1 | |
132 | #define TEST_K 2 | |
133 | #define TEST_SE0_NAK 3 | |
134 | #define TEST_PACKET 4 | |
135 | #define TEST_FORCE_EN 5 | |
136 | ||
562e7c71 TB |
137 | /* |
138 | * New Feature Selectors as added by USB 3.0 | |
139 | * See USB 3.0 spec Table 9-6 | |
140 | */ | |
141 | #define USB_DEVICE_U1_ENABLE 48 /* dev may initiate U1 transition */ | |
142 | #define USB_DEVICE_U2_ENABLE 49 /* dev may initiate U2 transition */ | |
143 | #define USB_DEVICE_LTM_ENABLE 50 /* dev may send LTM */ | |
144 | #define USB_INTRF_FUNC_SUSPEND 0 /* function suspend */ | |
145 | ||
146 | #define USB_INTR_FUNC_SUSPEND_OPT_MASK 0xFF00 | |
da6819db SAS |
147 | /* |
148 | * Suspend Options, Table 9-7 USB 3.0 spec | |
149 | */ | |
150 | #define USB_INTRF_FUNC_SUSPEND_LP (1 << (8 + 0)) | |
151 | #define USB_INTRF_FUNC_SUSPEND_RW (1 << (8 + 1)) | |
562e7c71 | 152 | |
1da177e4 LT |
153 | #define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */ |
154 | ||
562e7c71 TB |
155 | /* Bit array elements as returned by the USB_REQ_GET_STATUS request. */ |
156 | #define USB_DEV_STAT_U1_ENABLED 2 /* transition into U1 state */ | |
157 | #define USB_DEV_STAT_U2_ENABLED 3 /* transition into U2 state */ | |
158 | #define USB_DEV_STAT_LTM_ENABLED 4 /* Latency tolerance messages */ | |
1da177e4 LT |
159 | |
160 | /** | |
161 | * struct usb_ctrlrequest - SETUP data for a USB device control request | |
162 | * @bRequestType: matches the USB bmRequestType field | |
163 | * @bRequest: matches the USB bRequest field | |
164 | * @wValue: matches the USB wValue field (le16 byte order) | |
165 | * @wIndex: matches the USB wIndex field (le16 byte order) | |
166 | * @wLength: matches the USB wLength field (le16 byte order) | |
167 | * | |
168 | * This structure is used to send control requests to a USB device. It matches | |
169 | * the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the | |
170 | * USB spec for a fuller description of the different fields, and what they are | |
171 | * used for. | |
172 | * | |
173 | * Note that the driver for any interface can issue control requests. | |
174 | * For most devices, interfaces don't coordinate with each other, so | |
175 | * such requests may be made at any time. | |
176 | */ | |
177 | struct usb_ctrlrequest { | |
178 | __u8 bRequestType; | |
179 | __u8 bRequest; | |
180 | __le16 wValue; | |
181 | __le16 wIndex; | |
182 | __le16 wLength; | |
183 | } __attribute__ ((packed)); | |
184 | ||
185 | /*-------------------------------------------------------------------------*/ | |
186 | ||
187 | /* | |
188 | * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or | |
189 | * (rarely) accepted by SET_DESCRIPTOR. | |
190 | * | |
191 | * Note that all multi-byte values here are encoded in little endian | |
9a9fafb8 PE |
192 | * byte order "on the wire". Within the kernel and when exposed |
193 | * through the Linux-USB APIs, they are not converted to cpu byte | |
194 | * order; it is the responsibility of the client code to do this. | |
195 | * The single exception is when device and configuration descriptors (but | |
196 | * not other descriptors) are read from usbfs (i.e. /proc/bus/usb/BBB/DDD); | |
197 | * in this case the fields are converted to host endianness by the kernel. | |
1da177e4 LT |
198 | */ |
199 | ||
200 | /* | |
201 | * Descriptor types ... USB 2.0 spec table 9.5 | |
202 | */ | |
203 | #define USB_DT_DEVICE 0x01 | |
204 | #define USB_DT_CONFIG 0x02 | |
205 | #define USB_DT_STRING 0x03 | |
206 | #define USB_DT_INTERFACE 0x04 | |
207 | #define USB_DT_ENDPOINT 0x05 | |
208 | #define USB_DT_DEVICE_QUALIFIER 0x06 | |
209 | #define USB_DT_OTHER_SPEED_CONFIG 0x07 | |
210 | #define USB_DT_INTERFACE_POWER 0x08 | |
211 | /* these are from a minor usb 2.0 revision (ECN) */ | |
212 | #define USB_DT_OTG 0x09 | |
213 | #define USB_DT_DEBUG 0x0a | |
214 | #define USB_DT_INTERFACE_ASSOCIATION 0x0b | |
5da0106f DB |
215 | /* these are from the Wireless USB spec */ |
216 | #define USB_DT_SECURITY 0x0c | |
217 | #define USB_DT_KEY 0x0d | |
218 | #define USB_DT_ENCRYPTION_TYPE 0x0e | |
219 | #define USB_DT_BOS 0x0f | |
220 | #define USB_DT_DEVICE_CAPABILITY 0x10 | |
221 | #define USB_DT_WIRELESS_ENDPOINT_COMP 0x11 | |
5b5daf77 IPG |
222 | #define USB_DT_WIRE_ADAPTER 0x21 |
223 | #define USB_DT_RPIPE 0x22 | |
c27a4b71 | 224 | #define USB_DT_CS_RADIO_CONTROL 0x23 |
b18a2349 MW |
225 | /* From the T10 UAS specification */ |
226 | #define USB_DT_PIPE_USAGE 0x24 | |
663c30d0 SS |
227 | /* From the USB 3.0 spec */ |
228 | #define USB_DT_SS_ENDPOINT_COMP 0x30 | |
1da177e4 | 229 | |
aa2ce5ca DB |
230 | /* Conventional codes for class-specific descriptors. The convention is |
231 | * defined in the USB "Common Class" Spec (3.11). Individual class specs | |
232 | * are authoritative for their usage, not the "common class" writeup. | |
233 | */ | |
234 | #define USB_DT_CS_DEVICE (USB_TYPE_CLASS | USB_DT_DEVICE) | |
235 | #define USB_DT_CS_CONFIG (USB_TYPE_CLASS | USB_DT_CONFIG) | |
236 | #define USB_DT_CS_STRING (USB_TYPE_CLASS | USB_DT_STRING) | |
237 | #define USB_DT_CS_INTERFACE (USB_TYPE_CLASS | USB_DT_INTERFACE) | |
238 | #define USB_DT_CS_ENDPOINT (USB_TYPE_CLASS | USB_DT_ENDPOINT) | |
1da177e4 LT |
239 | |
240 | /* All standard descriptors have these 2 fields at the beginning */ | |
241 | struct usb_descriptor_header { | |
242 | __u8 bLength; | |
243 | __u8 bDescriptorType; | |
244 | } __attribute__ ((packed)); | |
245 | ||
246 | ||
247 | /*-------------------------------------------------------------------------*/ | |
248 | ||
249 | /* USB_DT_DEVICE: Device descriptor */ | |
250 | struct usb_device_descriptor { | |
251 | __u8 bLength; | |
252 | __u8 bDescriptorType; | |
253 | ||
254 | __le16 bcdUSB; | |
255 | __u8 bDeviceClass; | |
256 | __u8 bDeviceSubClass; | |
257 | __u8 bDeviceProtocol; | |
258 | __u8 bMaxPacketSize0; | |
259 | __le16 idVendor; | |
260 | __le16 idProduct; | |
261 | __le16 bcdDevice; | |
262 | __u8 iManufacturer; | |
263 | __u8 iProduct; | |
264 | __u8 iSerialNumber; | |
265 | __u8 bNumConfigurations; | |
266 | } __attribute__ ((packed)); | |
267 | ||
268 | #define USB_DT_DEVICE_SIZE 18 | |
269 | ||
270 | ||
271 | /* | |
272 | * Device and/or Interface Class codes | |
273 | * as found in bDeviceClass or bInterfaceClass | |
274 | * and defined by www.usb.org documents | |
275 | */ | |
276 | #define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */ | |
277 | #define USB_CLASS_AUDIO 1 | |
278 | #define USB_CLASS_COMM 2 | |
279 | #define USB_CLASS_HID 3 | |
280 | #define USB_CLASS_PHYSICAL 5 | |
281 | #define USB_CLASS_STILL_IMAGE 6 | |
282 | #define USB_CLASS_PRINTER 7 | |
283 | #define USB_CLASS_MASS_STORAGE 8 | |
284 | #define USB_CLASS_HUB 9 | |
285 | #define USB_CLASS_CDC_DATA 0x0a | |
286 | #define USB_CLASS_CSCID 0x0b /* chip+ smart card */ | |
287 | #define USB_CLASS_CONTENT_SEC 0x0d /* content security */ | |
288 | #define USB_CLASS_VIDEO 0x0e | |
5da0106f | 289 | #define USB_CLASS_WIRELESS_CONTROLLER 0xe0 |
e7d8712c | 290 | #define USB_CLASS_MISC 0xef |
1da177e4 LT |
291 | #define USB_CLASS_APP_SPEC 0xfe |
292 | #define USB_CLASS_VENDOR_SPEC 0xff | |
293 | ||
315ad302 LP |
294 | #define USB_SUBCLASS_VENDOR_SPEC 0xff |
295 | ||
1da177e4 LT |
296 | /*-------------------------------------------------------------------------*/ |
297 | ||
298 | /* USB_DT_CONFIG: Configuration descriptor information. | |
299 | * | |
300 | * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the | |
301 | * descriptor type is different. Highspeed-capable devices can look | |
302 | * different depending on what speed they're currently running. Only | |
303 | * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG | |
304 | * descriptors. | |
305 | */ | |
306 | struct usb_config_descriptor { | |
307 | __u8 bLength; | |
308 | __u8 bDescriptorType; | |
309 | ||
310 | __le16 wTotalLength; | |
311 | __u8 bNumInterfaces; | |
312 | __u8 bConfigurationValue; | |
313 | __u8 iConfiguration; | |
314 | __u8 bmAttributes; | |
315 | __u8 bMaxPower; | |
316 | } __attribute__ ((packed)); | |
317 | ||
318 | #define USB_DT_CONFIG_SIZE 9 | |
319 | ||
320 | /* from config descriptor bmAttributes */ | |
321 | #define USB_CONFIG_ATT_ONE (1 << 7) /* must be set */ | |
322 | #define USB_CONFIG_ATT_SELFPOWER (1 << 6) /* self powered */ | |
323 | #define USB_CONFIG_ATT_WAKEUP (1 << 5) /* can wakeup */ | |
5da0106f | 324 | #define USB_CONFIG_ATT_BATTERY (1 << 4) /* battery powered */ |
1da177e4 LT |
325 | |
326 | /*-------------------------------------------------------------------------*/ | |
327 | ||
328 | /* USB_DT_STRING: String descriptor */ | |
329 | struct usb_string_descriptor { | |
330 | __u8 bLength; | |
331 | __u8 bDescriptorType; | |
332 | ||
333 | __le16 wData[1]; /* UTF-16LE encoded */ | |
334 | } __attribute__ ((packed)); | |
335 | ||
336 | /* note that "string" zero is special, it holds language codes that | |
337 | * the device supports, not Unicode characters. | |
338 | */ | |
339 | ||
340 | /*-------------------------------------------------------------------------*/ | |
341 | ||
342 | /* USB_DT_INTERFACE: Interface descriptor */ | |
343 | struct usb_interface_descriptor { | |
344 | __u8 bLength; | |
345 | __u8 bDescriptorType; | |
346 | ||
347 | __u8 bInterfaceNumber; | |
348 | __u8 bAlternateSetting; | |
349 | __u8 bNumEndpoints; | |
350 | __u8 bInterfaceClass; | |
351 | __u8 bInterfaceSubClass; | |
352 | __u8 bInterfaceProtocol; | |
353 | __u8 iInterface; | |
354 | } __attribute__ ((packed)); | |
355 | ||
356 | #define USB_DT_INTERFACE_SIZE 9 | |
357 | ||
358 | /*-------------------------------------------------------------------------*/ | |
359 | ||
360 | /* USB_DT_ENDPOINT: Endpoint descriptor */ | |
361 | struct usb_endpoint_descriptor { | |
362 | __u8 bLength; | |
363 | __u8 bDescriptorType; | |
364 | ||
365 | __u8 bEndpointAddress; | |
366 | __u8 bmAttributes; | |
367 | __le16 wMaxPacketSize; | |
368 | __u8 bInterval; | |
369 | ||
4cceb4d1 GM |
370 | /* NOTE: these two are _only_ in audio endpoints. */ |
371 | /* use USB_DT_ENDPOINT*_SIZE in bLength, not sizeof. */ | |
1da177e4 LT |
372 | __u8 bRefresh; |
373 | __u8 bSynchAddress; | |
374 | } __attribute__ ((packed)); | |
375 | ||
376 | #define USB_DT_ENDPOINT_SIZE 7 | |
377 | #define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */ | |
378 | ||
379 | ||
380 | /* | |
381 | * Endpoints | |
382 | */ | |
383 | #define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */ | |
384 | #define USB_ENDPOINT_DIR_MASK 0x80 | |
385 | ||
386 | #define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */ | |
387 | #define USB_ENDPOINT_XFER_CONTROL 0 | |
388 | #define USB_ENDPOINT_XFER_ISOC 1 | |
389 | #define USB_ENDPOINT_XFER_BULK 2 | |
390 | #define USB_ENDPOINT_XFER_INT 3 | |
5da0106f | 391 | #define USB_ENDPOINT_MAX_ADJUSTABLE 0x80 |
1da177e4 | 392 | |
00137425 DM |
393 | #define USB_ENDPOINT_SYNCTYPE 0x0c |
394 | #define USB_ENDPOINT_SYNC_NONE (0 << 2) | |
395 | #define USB_ENDPOINT_SYNC_ASYNC (1 << 2) | |
396 | #define USB_ENDPOINT_SYNC_ADAPTIVE (2 << 2) | |
397 | #define USB_ENDPOINT_SYNC_SYNC (3 << 2) | |
398 | ||
399 | #define USB_ENDPOINT_USAGE_MASK 0x30 | |
400 | #define USB_ENDPOINT_USAGE_DATA 0x00 | |
401 | #define USB_ENDPOINT_USAGE_FEEDBACK 0x10 | |
402 | #define USB_ENDPOINT_USAGE_IMPLICIT_FB 0x20 /* Implicit feedback Data endpoint */ | |
403 | ||
4d6914b7 JL |
404 | /*-------------------------------------------------------------------------*/ |
405 | ||
406 | /** | |
407 | * usb_endpoint_num - get the endpoint's number | |
408 | * @epd: endpoint to be checked | |
409 | * | |
410 | * Returns @epd's number: 0 to 15. | |
411 | */ | |
412 | static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd) | |
413 | { | |
414 | return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; | |
415 | } | |
416 | ||
417 | /** | |
418 | * usb_endpoint_type - get the endpoint's transfer type | |
419 | * @epd: endpoint to be checked | |
420 | * | |
421 | * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according | |
422 | * to @epd's transfer type. | |
423 | */ | |
424 | static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd) | |
425 | { | |
426 | return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; | |
427 | } | |
428 | ||
429 | /** | |
430 | * usb_endpoint_dir_in - check if the endpoint has IN direction | |
431 | * @epd: endpoint to be checked | |
432 | * | |
433 | * Returns true if the endpoint is of type IN, otherwise it returns false. | |
434 | */ | |
435 | static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd) | |
436 | { | |
437 | return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN); | |
438 | } | |
439 | ||
440 | /** | |
441 | * usb_endpoint_dir_out - check if the endpoint has OUT direction | |
442 | * @epd: endpoint to be checked | |
443 | * | |
444 | * Returns true if the endpoint is of type OUT, otherwise it returns false. | |
445 | */ | |
446 | static inline int usb_endpoint_dir_out( | |
447 | const struct usb_endpoint_descriptor *epd) | |
448 | { | |
449 | return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT); | |
450 | } | |
451 | ||
452 | /** | |
453 | * usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type | |
454 | * @epd: endpoint to be checked | |
455 | * | |
456 | * Returns true if the endpoint is of type bulk, otherwise it returns false. | |
457 | */ | |
458 | static inline int usb_endpoint_xfer_bulk( | |
459 | const struct usb_endpoint_descriptor *epd) | |
460 | { | |
461 | return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
462 | USB_ENDPOINT_XFER_BULK); | |
463 | } | |
464 | ||
465 | /** | |
466 | * usb_endpoint_xfer_control - check if the endpoint has control transfer type | |
467 | * @epd: endpoint to be checked | |
468 | * | |
469 | * Returns true if the endpoint is of type control, otherwise it returns false. | |
470 | */ | |
471 | static inline int usb_endpoint_xfer_control( | |
472 | const struct usb_endpoint_descriptor *epd) | |
473 | { | |
474 | return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
475 | USB_ENDPOINT_XFER_CONTROL); | |
476 | } | |
477 | ||
478 | /** | |
479 | * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type | |
480 | * @epd: endpoint to be checked | |
481 | * | |
482 | * Returns true if the endpoint is of type interrupt, otherwise it returns | |
483 | * false. | |
484 | */ | |
485 | static inline int usb_endpoint_xfer_int( | |
486 | const struct usb_endpoint_descriptor *epd) | |
487 | { | |
488 | return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
489 | USB_ENDPOINT_XFER_INT); | |
490 | } | |
491 | ||
492 | /** | |
493 | * usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type | |
494 | * @epd: endpoint to be checked | |
495 | * | |
496 | * Returns true if the endpoint is of type isochronous, otherwise it returns | |
497 | * false. | |
498 | */ | |
499 | static inline int usb_endpoint_xfer_isoc( | |
500 | const struct usb_endpoint_descriptor *epd) | |
501 | { | |
502 | return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
503 | USB_ENDPOINT_XFER_ISOC); | |
504 | } | |
505 | ||
506 | /** | |
507 | * usb_endpoint_is_bulk_in - check if the endpoint is bulk IN | |
508 | * @epd: endpoint to be checked | |
509 | * | |
510 | * Returns true if the endpoint has bulk transfer type and IN direction, | |
511 | * otherwise it returns false. | |
512 | */ | |
513 | static inline int usb_endpoint_is_bulk_in( | |
514 | const struct usb_endpoint_descriptor *epd) | |
515 | { | |
0858a3a5 | 516 | return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd); |
4d6914b7 JL |
517 | } |
518 | ||
519 | /** | |
520 | * usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT | |
521 | * @epd: endpoint to be checked | |
522 | * | |
523 | * Returns true if the endpoint has bulk transfer type and OUT direction, | |
524 | * otherwise it returns false. | |
525 | */ | |
526 | static inline int usb_endpoint_is_bulk_out( | |
527 | const struct usb_endpoint_descriptor *epd) | |
528 | { | |
0858a3a5 | 529 | return usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd); |
4d6914b7 JL |
530 | } |
531 | ||
532 | /** | |
533 | * usb_endpoint_is_int_in - check if the endpoint is interrupt IN | |
534 | * @epd: endpoint to be checked | |
535 | * | |
536 | * Returns true if the endpoint has interrupt transfer type and IN direction, | |
537 | * otherwise it returns false. | |
538 | */ | |
539 | static inline int usb_endpoint_is_int_in( | |
540 | const struct usb_endpoint_descriptor *epd) | |
541 | { | |
0858a3a5 | 542 | return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd); |
4d6914b7 JL |
543 | } |
544 | ||
545 | /** | |
546 | * usb_endpoint_is_int_out - check if the endpoint is interrupt OUT | |
547 | * @epd: endpoint to be checked | |
548 | * | |
549 | * Returns true if the endpoint has interrupt transfer type and OUT direction, | |
550 | * otherwise it returns false. | |
551 | */ | |
552 | static inline int usb_endpoint_is_int_out( | |
553 | const struct usb_endpoint_descriptor *epd) | |
554 | { | |
0858a3a5 | 555 | return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd); |
4d6914b7 JL |
556 | } |
557 | ||
558 | /** | |
559 | * usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN | |
560 | * @epd: endpoint to be checked | |
561 | * | |
562 | * Returns true if the endpoint has isochronous transfer type and IN direction, | |
563 | * otherwise it returns false. | |
564 | */ | |
565 | static inline int usb_endpoint_is_isoc_in( | |
566 | const struct usb_endpoint_descriptor *epd) | |
567 | { | |
0858a3a5 | 568 | return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_in(epd); |
4d6914b7 JL |
569 | } |
570 | ||
571 | /** | |
572 | * usb_endpoint_is_isoc_out - check if the endpoint is isochronous OUT | |
573 | * @epd: endpoint to be checked | |
574 | * | |
575 | * Returns true if the endpoint has isochronous transfer type and OUT direction, | |
576 | * otherwise it returns false. | |
577 | */ | |
578 | static inline int usb_endpoint_is_isoc_out( | |
579 | const struct usb_endpoint_descriptor *epd) | |
580 | { | |
0858a3a5 | 581 | return usb_endpoint_xfer_isoc(epd) && usb_endpoint_dir_out(epd); |
4d6914b7 | 582 | } |
1da177e4 | 583 | |
939f325f | 584 | /** |
585 | * usb_endpoint_maxp - get endpoint's max packet size | |
586 | * @epd: endpoint to be checked | |
587 | * | |
588 | * Returns @epd's max packet | |
589 | */ | |
590 | static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd) | |
591 | { | |
504b6163 | 592 | return __le16_to_cpu(epd->wMaxPacketSize); |
939f325f | 593 | } |
594 | ||
1da177e4 LT |
595 | /*-------------------------------------------------------------------------*/ |
596 | ||
663c30d0 | 597 | /* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */ |
f0058c62 | 598 | struct usb_ss_ep_comp_descriptor { |
663c30d0 SS |
599 | __u8 bLength; |
600 | __u8 bDescriptorType; | |
601 | ||
602 | __u8 bMaxBurst; | |
603 | __u8 bmAttributes; | |
64b3c304 | 604 | __le16 wBytesPerInterval; |
663c30d0 SS |
605 | } __attribute__ ((packed)); |
606 | ||
f0058c62 | 607 | #define USB_DT_SS_EP_COMP_SIZE 6 |
18b7ede5 | 608 | |
22ad1e7f | 609 | /* Bits 4:0 of bmAttributes if this is a bulk endpoint */ |
18b7ede5 FB |
610 | static inline int |
611 | usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp) | |
612 | { | |
613 | int max_streams; | |
614 | ||
615 | if (!comp) | |
616 | return 0; | |
617 | ||
618 | max_streams = comp->bmAttributes & 0x1f; | |
619 | ||
620 | if (!max_streams) | |
621 | return 0; | |
622 | ||
623 | max_streams = 1 << max_streams; | |
624 | ||
625 | return max_streams; | |
626 | } | |
627 | ||
500132a0 PZ |
628 | /* Bits 1:0 of bmAttributes if this is an isoc endpoint */ |
629 | #define USB_SS_MULT(p) (1 + ((p) & 0x3)) | |
663c30d0 SS |
630 | |
631 | /*-------------------------------------------------------------------------*/ | |
632 | ||
1da177e4 LT |
633 | /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */ |
634 | struct usb_qualifier_descriptor { | |
635 | __u8 bLength; | |
636 | __u8 bDescriptorType; | |
637 | ||
638 | __le16 bcdUSB; | |
639 | __u8 bDeviceClass; | |
640 | __u8 bDeviceSubClass; | |
641 | __u8 bDeviceProtocol; | |
642 | __u8 bMaxPacketSize0; | |
643 | __u8 bNumConfigurations; | |
644 | __u8 bRESERVED; | |
645 | } __attribute__ ((packed)); | |
646 | ||
647 | ||
648 | /*-------------------------------------------------------------------------*/ | |
649 | ||
650 | /* USB_DT_OTG (from OTG 1.0a supplement) */ | |
651 | struct usb_otg_descriptor { | |
652 | __u8 bLength; | |
653 | __u8 bDescriptorType; | |
654 | ||
655 | __u8 bmAttributes; /* support for HNP, SRP, etc */ | |
656 | } __attribute__ ((packed)); | |
657 | ||
658 | /* from usb_otg_descriptor.bmAttributes */ | |
659 | #define USB_OTG_SRP (1 << 0) | |
660 | #define USB_OTG_HNP (1 << 1) /* swap host/device roles */ | |
661 | ||
662 | /*-------------------------------------------------------------------------*/ | |
663 | ||
664 | /* USB_DT_DEBUG: for special highspeed devices, replacing serial console */ | |
665 | struct usb_debug_descriptor { | |
666 | __u8 bLength; | |
667 | __u8 bDescriptorType; | |
668 | ||
669 | /* bulk endpoints with 8 byte maxpacket */ | |
670 | __u8 bDebugInEndpoint; | |
671 | __u8 bDebugOutEndpoint; | |
23004e24 | 672 | } __attribute__((packed)); |
1da177e4 LT |
673 | |
674 | /*-------------------------------------------------------------------------*/ | |
675 | ||
676 | /* USB_DT_INTERFACE_ASSOCIATION: groups interfaces */ | |
677 | struct usb_interface_assoc_descriptor { | |
678 | __u8 bLength; | |
679 | __u8 bDescriptorType; | |
680 | ||
681 | __u8 bFirstInterface; | |
682 | __u8 bInterfaceCount; | |
683 | __u8 bFunctionClass; | |
684 | __u8 bFunctionSubClass; | |
685 | __u8 bFunctionProtocol; | |
686 | __u8 iFunction; | |
687 | } __attribute__ ((packed)); | |
688 | ||
689 | ||
5da0106f DB |
690 | /*-------------------------------------------------------------------------*/ |
691 | ||
692 | /* USB_DT_SECURITY: group of wireless security descriptors, including | |
693 | * encryption types available for setting up a CC/association. | |
694 | */ | |
695 | struct usb_security_descriptor { | |
696 | __u8 bLength; | |
697 | __u8 bDescriptorType; | |
698 | ||
699 | __le16 wTotalLength; | |
700 | __u8 bNumEncryptionTypes; | |
23004e24 | 701 | } __attribute__((packed)); |
5da0106f DB |
702 | |
703 | /*-------------------------------------------------------------------------*/ | |
704 | ||
705 | /* USB_DT_KEY: used with {GET,SET}_SECURITY_DATA; only public keys | |
706 | * may be retrieved. | |
707 | */ | |
708 | struct usb_key_descriptor { | |
709 | __u8 bLength; | |
710 | __u8 bDescriptorType; | |
711 | ||
712 | __u8 tTKID[3]; | |
713 | __u8 bReserved; | |
714 | __u8 bKeyData[0]; | |
23004e24 | 715 | } __attribute__((packed)); |
5da0106f DB |
716 | |
717 | /*-------------------------------------------------------------------------*/ | |
718 | ||
719 | /* USB_DT_ENCRYPTION_TYPE: bundled in DT_SECURITY groups */ | |
720 | struct usb_encryption_descriptor { | |
721 | __u8 bLength; | |
722 | __u8 bDescriptorType; | |
723 | ||
724 | __u8 bEncryptionType; | |
725 | #define USB_ENC_TYPE_UNSECURE 0 | |
726 | #define USB_ENC_TYPE_WIRED 1 /* non-wireless mode */ | |
727 | #define USB_ENC_TYPE_CCM_1 2 /* aes128/cbc session */ | |
728 | #define USB_ENC_TYPE_RSA_1 3 /* rsa3072/sha1 auth */ | |
729 | __u8 bEncryptionValue; /* use in SET_ENCRYPTION */ | |
730 | __u8 bAuthKeyIndex; | |
23004e24 | 731 | } __attribute__((packed)); |
5da0106f DB |
732 | |
733 | ||
734 | /*-------------------------------------------------------------------------*/ | |
735 | ||
35e5437e | 736 | /* USB_DT_BOS: group of device-level capabilities */ |
5da0106f DB |
737 | struct usb_bos_descriptor { |
738 | __u8 bLength; | |
739 | __u8 bDescriptorType; | |
740 | ||
741 | __le16 wTotalLength; | |
742 | __u8 bNumDeviceCaps; | |
23004e24 | 743 | } __attribute__((packed)); |
5da0106f | 744 | |
562e7c71 | 745 | #define USB_DT_BOS_SIZE 5 |
5da0106f DB |
746 | /*-------------------------------------------------------------------------*/ |
747 | ||
748 | /* USB_DT_DEVICE_CAPABILITY: grouped with BOS */ | |
749 | struct usb_dev_cap_header { | |
750 | __u8 bLength; | |
751 | __u8 bDescriptorType; | |
752 | __u8 bDevCapabilityType; | |
23004e24 | 753 | } __attribute__((packed)); |
5da0106f DB |
754 | |
755 | #define USB_CAP_TYPE_WIRELESS_USB 1 | |
756 | ||
757 | struct usb_wireless_cap_descriptor { /* Ultra Wide Band */ | |
758 | __u8 bLength; | |
759 | __u8 bDescriptorType; | |
760 | __u8 bDevCapabilityType; | |
761 | ||
762 | __u8 bmAttributes; | |
763 | #define USB_WIRELESS_P2P_DRD (1 << 1) | |
764 | #define USB_WIRELESS_BEACON_MASK (3 << 2) | |
765 | #define USB_WIRELESS_BEACON_SELF (1 << 2) | |
766 | #define USB_WIRELESS_BEACON_DIRECTED (2 << 2) | |
767 | #define USB_WIRELESS_BEACON_NONE (3 << 2) | |
768 | __le16 wPHYRates; /* bit rates, Mbps */ | |
769 | #define USB_WIRELESS_PHY_53 (1 << 0) /* always set */ | |
770 | #define USB_WIRELESS_PHY_80 (1 << 1) | |
771 | #define USB_WIRELESS_PHY_107 (1 << 2) /* always set */ | |
772 | #define USB_WIRELESS_PHY_160 (1 << 3) | |
773 | #define USB_WIRELESS_PHY_200 (1 << 4) /* always set */ | |
774 | #define USB_WIRELESS_PHY_320 (1 << 5) | |
775 | #define USB_WIRELESS_PHY_400 (1 << 6) | |
776 | #define USB_WIRELESS_PHY_480 (1 << 7) | |
777 | __u8 bmTFITXPowerInfo; /* TFI power levels */ | |
778 | __u8 bmFFITXPowerInfo; /* FFI power levels */ | |
779 | __le16 bmBandGroup; | |
780 | __u8 bReserved; | |
23004e24 | 781 | } __attribute__((packed)); |
5da0106f | 782 | |
562e7c71 | 783 | /* USB 2.0 Extension descriptor */ |
35e5437e SS |
784 | #define USB_CAP_TYPE_EXT 2 |
785 | ||
786 | struct usb_ext_cap_descriptor { /* Link Power Management */ | |
787 | __u8 bLength; | |
788 | __u8 bDescriptorType; | |
789 | __u8 bDevCapabilityType; | |
562e7c71 | 790 | __le32 bmAttributes; |
35e5437e | 791 | #define USB_LPM_SUPPORT (1 << 1) /* supports LPM */ |
f99298bf AX |
792 | #define USB_BESL_SUPPORT (1 << 2) /* supports BESL */ |
793 | #define USB_BESL_BASELINE_VALID (1 << 3) /* Baseline BESL valid*/ | |
794 | #define USB_BESL_DEEP_VALID (1 << 4) /* Deep BESL valid */ | |
795 | #define USB_GET_BESL_BASELINE(p) (((p) & (0xf << 8)) >> 8) | |
796 | #define USB_GET_BESL_DEEP(p) (((p) & (0xf << 12)) >> 12) | |
35e5437e SS |
797 | } __attribute__((packed)); |
798 | ||
562e7c71 TB |
799 | #define USB_DT_USB_EXT_CAP_SIZE 7 |
800 | ||
801 | /* | |
802 | * SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB | |
803 | * specific device level capabilities | |
804 | */ | |
805 | #define USB_SS_CAP_TYPE 3 | |
806 | struct usb_ss_cap_descriptor { /* Link Power Management */ | |
807 | __u8 bLength; | |
808 | __u8 bDescriptorType; | |
809 | __u8 bDevCapabilityType; | |
810 | __u8 bmAttributes; | |
811 | #define USB_LTM_SUPPORT (1 << 1) /* supports LTM */ | |
812 | __le16 wSpeedSupported; | |
813 | #define USB_LOW_SPEED_OPERATION (1) /* Low speed operation */ | |
814 | #define USB_FULL_SPEED_OPERATION (1 << 1) /* Full speed operation */ | |
815 | #define USB_HIGH_SPEED_OPERATION (1 << 2) /* High speed operation */ | |
816 | #define USB_5GBPS_OPERATION (1 << 3) /* Operation at 5Gbps */ | |
817 | __u8 bFunctionalitySupport; | |
818 | __u8 bU1devExitLat; | |
819 | __le16 bU2DevExitLat; | |
820 | } __attribute__((packed)); | |
821 | ||
822 | #define USB_DT_USB_SS_CAP_SIZE 10 | |
823 | ||
824 | /* | |
825 | * Container ID Capability descriptor: Defines the instance unique ID used to | |
826 | * identify the instance across all operating modes | |
827 | */ | |
828 | #define CONTAINER_ID_TYPE 4 | |
829 | struct usb_ss_container_id_descriptor { | |
830 | __u8 bLength; | |
831 | __u8 bDescriptorType; | |
832 | __u8 bDevCapabilityType; | |
833 | __u8 bReserved; | |
834 | __u8 ContainerID[16]; /* 128-bit number */ | |
835 | } __attribute__((packed)); | |
836 | ||
837 | #define USB_DT_USB_SS_CONTN_ID_SIZE 20 | |
5da0106f DB |
838 | /*-------------------------------------------------------------------------*/ |
839 | ||
840 | /* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with | |
841 | * each endpoint descriptor for a wireless device | |
842 | */ | |
843 | struct usb_wireless_ep_comp_descriptor { | |
844 | __u8 bLength; | |
845 | __u8 bDescriptorType; | |
846 | ||
847 | __u8 bMaxBurst; | |
848 | __u8 bMaxSequence; | |
849 | __le16 wMaxStreamDelay; | |
850 | __le16 wOverTheAirPacketSize; | |
851 | __u8 bOverTheAirInterval; | |
852 | __u8 bmCompAttributes; | |
853 | #define USB_ENDPOINT_SWITCH_MASK 0x03 /* in bmCompAttributes */ | |
854 | #define USB_ENDPOINT_SWITCH_NO 0 | |
855 | #define USB_ENDPOINT_SWITCH_SWITCH 1 | |
856 | #define USB_ENDPOINT_SWITCH_SCALE 2 | |
23004e24 | 857 | } __attribute__((packed)); |
5da0106f DB |
858 | |
859 | /*-------------------------------------------------------------------------*/ | |
860 | ||
861 | /* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless | |
862 | * host and a device for connection set up, mutual authentication, and | |
863 | * exchanging short lived session keys. The handshake depends on a CC. | |
864 | */ | |
865 | struct usb_handshake { | |
866 | __u8 bMessageNumber; | |
867 | __u8 bStatus; | |
868 | __u8 tTKID[3]; | |
869 | __u8 bReserved; | |
870 | __u8 CDID[16]; | |
871 | __u8 nonce[16]; | |
872 | __u8 MIC[8]; | |
23004e24 | 873 | } __attribute__((packed)); |
5da0106f DB |
874 | |
875 | /*-------------------------------------------------------------------------*/ | |
876 | ||
877 | /* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC). | |
878 | * A CC may also be set up using non-wireless secure channels (including | |
879 | * wired USB!), and some devices may support CCs with multiple hosts. | |
880 | */ | |
881 | struct usb_connection_context { | |
882 | __u8 CHID[16]; /* persistent host id */ | |
883 | __u8 CDID[16]; /* device id (unique w/in host context) */ | |
884 | __u8 CK[16]; /* connection key */ | |
23004e24 | 885 | } __attribute__((packed)); |
5da0106f | 886 | |
1da177e4 LT |
887 | /*-------------------------------------------------------------------------*/ |
888 | ||
889 | /* USB 2.0 defines three speeds, here's how Linux identifies them */ | |
890 | ||
891 | enum usb_device_speed { | |
892 | USB_SPEED_UNKNOWN = 0, /* enumerating */ | |
893 | USB_SPEED_LOW, USB_SPEED_FULL, /* usb 1.1 */ | |
5da0106f | 894 | USB_SPEED_HIGH, /* usb 2.0 */ |
551cdbbe | 895 | USB_SPEED_WIRELESS, /* wireless (usb 2.5) */ |
6b403b02 | 896 | USB_SPEED_SUPER, /* usb 3.0 */ |
1da177e4 LT |
897 | }; |
898 | ||
e538dfda MN |
899 | #ifdef __KERNEL__ |
900 | ||
901 | /** | |
902 | * usb_speed_string() - Returns human readable-name of the speed. | |
903 | * @speed: The speed to return human-readable name for. If it's not | |
904 | * any of the speeds defined in usb_device_speed enum, string for | |
905 | * USB_SPEED_UNKNOWN will be returned. | |
906 | */ | |
907 | extern const char *usb_speed_string(enum usb_device_speed speed); | |
908 | ||
909 | #endif | |
910 | ||
1da177e4 LT |
911 | enum usb_device_state { |
912 | /* NOTATTACHED isn't in the USB spec, and this state acts | |
913 | * the same as ATTACHED ... but it's clearer this way. | |
914 | */ | |
915 | USB_STATE_NOTATTACHED = 0, | |
916 | ||
c02c4bb2 | 917 | /* chapter 9 and authentication (wireless) device states */ |
1da177e4 | 918 | USB_STATE_ATTACHED, |
c02c4bb2 | 919 | USB_STATE_POWERED, /* wired */ |
c02c4bb2 | 920 | USB_STATE_RECONNECTING, /* auth */ |
6da9c990 | 921 | USB_STATE_UNAUTHENTICATED, /* auth */ |
1da177e4 LT |
922 | USB_STATE_DEFAULT, /* limited function */ |
923 | USB_STATE_ADDRESS, | |
924 | USB_STATE_CONFIGURED, /* most functions */ | |
925 | ||
926 | USB_STATE_SUSPENDED | |
927 | ||
928 | /* NOTE: there are actually four different SUSPENDED | |
929 | * states, returning to POWERED, DEFAULT, ADDRESS, or | |
930 | * CONFIGURED respectively when SOF tokens flow again. | |
dbe0dbb7 DB |
931 | * At this level there's no difference between L1 and L2 |
932 | * suspend states. (L2 being original USB 1.1 suspend.) | |
1da177e4 LT |
933 | */ |
934 | }; | |
935 | ||
37b5801e PM |
936 | /*-------------------------------------------------------------------------*/ |
937 | ||
938 | /* | |
939 | * As per USB compliance update, a device that is actively drawing | |
940 | * more than 100mA from USB must report itself as bus-powered in | |
941 | * the GetStatus(DEVICE) call. | |
942 | * http://compliance.usb.org/index.asp?UpdateFile=Electrical&Format=Standard#34 | |
943 | */ | |
944 | #define USB_SELF_POWER_VBUS_MAX_DRAW 100 | |
945 | ||
dda43a0e | 946 | #endif /* __LINUX_USB_CH9_H */ |