1 | #include "qemu/osdep.h" |
2 | |
3 | #include "hw/usb.h" |
4 | #include "desc.h" |
5 | #include "trace.h" |
6 | |
7 | /* ------------------------------------------------------------------ */ |
8 | |
9 | int usb_desc_device(const USBDescID *id, const USBDescDevice *dev, |
10 | bool msos, uint8_t *dest, size_t len) |
11 | { |
12 | uint8_t bLength = 0x12; |
13 | USBDescriptor *d = (void *)dest; |
14 | |
15 | if (len < bLength) { |
16 | return -1; |
17 | } |
18 | |
19 | d->bLength = bLength; |
20 | d->bDescriptorType = USB_DT_DEVICE; |
21 | |
22 | if (msos && dev->bcdUSB < 0x0200) { |
23 | /* |
24 | * Version 2.0+ required for microsoft os descriptors to work. |
25 | * Done this way so msos-desc compat property will handle both |
26 | * the version and the new descriptors being present. |
27 | */ |
28 | d->u.device.bcdUSB_lo = usb_lo(0x0200); |
29 | d->u.device.bcdUSB_hi = usb_hi(0x0200); |
30 | } else { |
31 | d->u.device.bcdUSB_lo = usb_lo(dev->bcdUSB); |
32 | d->u.device.bcdUSB_hi = usb_hi(dev->bcdUSB); |
33 | } |
34 | d->u.device.bDeviceClass = dev->bDeviceClass; |
35 | d->u.device.bDeviceSubClass = dev->bDeviceSubClass; |
36 | d->u.device.bDeviceProtocol = dev->bDeviceProtocol; |
37 | d->u.device.bMaxPacketSize0 = dev->bMaxPacketSize0; |
38 | |
39 | d->u.device.idVendor_lo = usb_lo(id->idVendor); |
40 | d->u.device.idVendor_hi = usb_hi(id->idVendor); |
41 | d->u.device.idProduct_lo = usb_lo(id->idProduct); |
42 | d->u.device.idProduct_hi = usb_hi(id->idProduct); |
43 | d->u.device.bcdDevice_lo = usb_lo(id->bcdDevice); |
44 | d->u.device.bcdDevice_hi = usb_hi(id->bcdDevice); |
45 | d->u.device.iManufacturer = id->iManufacturer; |
46 | d->u.device.iProduct = id->iProduct; |
47 | d->u.device.iSerialNumber = id->iSerialNumber; |
48 | |
49 | d->u.device.bNumConfigurations = dev->bNumConfigurations; |
50 | |
51 | return bLength; |
52 | } |
53 | |
54 | int usb_desc_device_qualifier(const USBDescDevice *dev, |
55 | uint8_t *dest, size_t len) |
56 | { |
57 | uint8_t bLength = 0x0a; |
58 | USBDescriptor *d = (void *)dest; |
59 | |
60 | if (len < bLength) { |
61 | return -1; |
62 | } |
63 | |
64 | d->bLength = bLength; |
65 | d->bDescriptorType = USB_DT_DEVICE_QUALIFIER; |
66 | |
67 | d->u.device_qualifier.bcdUSB_lo = usb_lo(dev->bcdUSB); |
68 | d->u.device_qualifier.bcdUSB_hi = usb_hi(dev->bcdUSB); |
69 | d->u.device_qualifier.bDeviceClass = dev->bDeviceClass; |
70 | d->u.device_qualifier.bDeviceSubClass = dev->bDeviceSubClass; |
71 | d->u.device_qualifier.bDeviceProtocol = dev->bDeviceProtocol; |
72 | d->u.device_qualifier.bMaxPacketSize0 = dev->bMaxPacketSize0; |
73 | d->u.device_qualifier.bNumConfigurations = dev->bNumConfigurations; |
74 | d->u.device_qualifier.bReserved = 0; |
75 | |
76 | return bLength; |
77 | } |
78 | |
79 | int usb_desc_config(const USBDescConfig *conf, int flags, |
80 | uint8_t *dest, size_t len) |
81 | { |
82 | uint8_t bLength = 0x09; |
83 | uint16_t wTotalLength = 0; |
84 | USBDescriptor *d = (void *)dest; |
85 | int i, rc; |
86 | |
87 | if (len < bLength) { |
88 | return -1; |
89 | } |
90 | |
91 | d->bLength = bLength; |
92 | d->bDescriptorType = USB_DT_CONFIG; |
93 | |
94 | d->u.config.bNumInterfaces = conf->bNumInterfaces; |
95 | d->u.config.bConfigurationValue = conf->bConfigurationValue; |
96 | d->u.config.iConfiguration = conf->iConfiguration; |
97 | d->u.config.bmAttributes = conf->bmAttributes; |
98 | d->u.config.bMaxPower = conf->bMaxPower; |
99 | wTotalLength += bLength; |
100 | |
101 | /* handle grouped interfaces if any */ |
102 | for (i = 0; i < conf->nif_groups; i++) { |
103 | rc = usb_desc_iface_group(&(conf->if_groups[i]), flags, |
104 | dest + wTotalLength, |
105 | len - wTotalLength); |
106 | if (rc < 0) { |
107 | return rc; |
108 | } |
109 | wTotalLength += rc; |
110 | } |
111 | |
112 | /* handle normal (ungrouped / no IAD) interfaces if any */ |
113 | for (i = 0; i < conf->nif; i++) { |
114 | rc = usb_desc_iface(conf->ifs + i, flags, |
115 | dest + wTotalLength, len - wTotalLength); |
116 | if (rc < 0) { |
117 | return rc; |
118 | } |
119 | wTotalLength += rc; |
120 | } |
121 | |
122 | d->u.config.wTotalLength_lo = usb_lo(wTotalLength); |
123 | d->u.config.wTotalLength_hi = usb_hi(wTotalLength); |
124 | return wTotalLength; |
125 | } |
126 | |
127 | int usb_desc_iface_group(const USBDescIfaceAssoc *iad, int flags, |
128 | uint8_t *dest, size_t len) |
129 | { |
130 | int pos = 0; |
131 | int i = 0; |
132 | |
133 | /* handle interface association descriptor */ |
134 | uint8_t bLength = 0x08; |
135 | |
136 | if (len < bLength) { |
137 | return -1; |
138 | } |
139 | |
140 | dest[0x00] = bLength; |
141 | dest[0x01] = USB_DT_INTERFACE_ASSOC; |
142 | dest[0x02] = iad->bFirstInterface; |
143 | dest[0x03] = iad->bInterfaceCount; |
144 | dest[0x04] = iad->bFunctionClass; |
145 | dest[0x05] = iad->bFunctionSubClass; |
146 | dest[0x06] = iad->bFunctionProtocol; |
147 | dest[0x07] = iad->iFunction; |
148 | pos += bLength; |
149 | |
150 | /* handle associated interfaces in this group */ |
151 | for (i = 0; i < iad->nif; i++) { |
152 | int rc = usb_desc_iface(&(iad->ifs[i]), flags, dest + pos, len - pos); |
153 | if (rc < 0) { |
154 | return rc; |
155 | } |
156 | pos += rc; |
157 | } |
158 | |
159 | return pos; |
160 | } |
161 | |
162 | int usb_desc_iface(const USBDescIface *iface, int flags, |
163 | uint8_t *dest, size_t len) |
164 | { |
165 | uint8_t bLength = 0x09; |
166 | int i, rc, pos = 0; |
167 | USBDescriptor *d = (void *)dest; |
168 | |
169 | if (len < bLength) { |
170 | return -1; |
171 | } |
172 | |
173 | d->bLength = bLength; |
174 | d->bDescriptorType = USB_DT_INTERFACE; |
175 | |
176 | d->u.interface.bInterfaceNumber = iface->bInterfaceNumber; |
177 | d->u.interface.bAlternateSetting = iface->bAlternateSetting; |
178 | d->u.interface.bNumEndpoints = iface->bNumEndpoints; |
179 | d->u.interface.bInterfaceClass = iface->bInterfaceClass; |
180 | d->u.interface.bInterfaceSubClass = iface->bInterfaceSubClass; |
181 | d->u.interface.bInterfaceProtocol = iface->bInterfaceProtocol; |
182 | d->u.interface.iInterface = iface->iInterface; |
183 | pos += bLength; |
184 | |
185 | for (i = 0; i < iface->ndesc; i++) { |
186 | rc = usb_desc_other(iface->descs + i, dest + pos, len - pos); |
187 | if (rc < 0) { |
188 | return rc; |
189 | } |
190 | pos += rc; |
191 | } |
192 | |
193 | for (i = 0; i < iface->bNumEndpoints; i++) { |
194 | rc = usb_desc_endpoint(iface->eps + i, flags, dest + pos, len - pos); |
195 | if (rc < 0) { |
196 | return rc; |
197 | } |
198 | pos += rc; |
199 | } |
200 | |
201 | return pos; |
202 | } |
203 | |
204 | int usb_desc_endpoint(const USBDescEndpoint *ep, int flags, |
205 | uint8_t *dest, size_t len) |
206 | { |
207 | uint8_t bLength = ep->is_audio ? 0x09 : 0x07; |
208 | uint8_t = ep->extra ? ep->extra[0] : 0; |
209 | uint8_t superlen = (flags & USB_DESC_FLAG_SUPER) ? 0x06 : 0; |
210 | USBDescriptor *d = (void *)dest; |
211 | |
212 | if (len < bLength + extralen + superlen) { |
213 | return -1; |
214 | } |
215 | |
216 | d->bLength = bLength; |
217 | d->bDescriptorType = USB_DT_ENDPOINT; |
218 | |
219 | d->u.endpoint.bEndpointAddress = ep->bEndpointAddress; |
220 | d->u.endpoint.bmAttributes = ep->bmAttributes; |
221 | d->u.endpoint.wMaxPacketSize_lo = usb_lo(ep->wMaxPacketSize); |
222 | d->u.endpoint.wMaxPacketSize_hi = usb_hi(ep->wMaxPacketSize); |
223 | d->u.endpoint.bInterval = ep->bInterval; |
224 | if (ep->is_audio) { |
225 | d->u.endpoint.bRefresh = ep->bRefresh; |
226 | d->u.endpoint.bSynchAddress = ep->bSynchAddress; |
227 | } |
228 | |
229 | if (superlen) { |
230 | USBDescriptor *d = (void *)(dest + bLength); |
231 | |
232 | d->bLength = 0x06; |
233 | d->bDescriptorType = USB_DT_ENDPOINT_COMPANION; |
234 | |
235 | d->u.super_endpoint.bMaxBurst = ep->bMaxBurst; |
236 | d->u.super_endpoint.bmAttributes = ep->bmAttributes_super; |
237 | d->u.super_endpoint.wBytesPerInterval_lo = |
238 | usb_lo(ep->wBytesPerInterval); |
239 | d->u.super_endpoint.wBytesPerInterval_hi = |
240 | usb_hi(ep->wBytesPerInterval); |
241 | } |
242 | |
243 | if (ep->extra) { |
244 | memcpy(dest + bLength + superlen, ep->extra, extralen); |
245 | } |
246 | |
247 | return bLength + extralen + superlen; |
248 | } |
249 | |
250 | int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len) |
251 | { |
252 | int bLength = desc->length ? desc->length : desc->data[0]; |
253 | |
254 | if (len < bLength) { |
255 | return -1; |
256 | } |
257 | |
258 | memcpy(dest, desc->data, bLength); |
259 | return bLength; |
260 | } |
261 | |
262 | static int usb_desc_cap_usb2_ext(const USBDesc *desc, uint8_t *dest, size_t len) |
263 | { |
264 | uint8_t bLength = 0x07; |
265 | USBDescriptor *d = (void *)dest; |
266 | |
267 | if (len < bLength) { |
268 | return -1; |
269 | } |
270 | |
271 | d->bLength = bLength; |
272 | d->bDescriptorType = USB_DT_DEVICE_CAPABILITY; |
273 | d->u.cap.bDevCapabilityType = USB_DEV_CAP_USB2_EXT; |
274 | |
275 | d->u.cap.u.usb2_ext.bmAttributes_1 = (1 << 1); /* LPM */ |
276 | d->u.cap.u.usb2_ext.bmAttributes_2 = 0; |
277 | d->u.cap.u.usb2_ext.bmAttributes_3 = 0; |
278 | d->u.cap.u.usb2_ext.bmAttributes_4 = 0; |
279 | |
280 | return bLength; |
281 | } |
282 | |
283 | static int usb_desc_cap_super(const USBDesc *desc, uint8_t *dest, size_t len) |
284 | { |
285 | uint8_t bLength = 0x0a; |
286 | USBDescriptor *d = (void *)dest; |
287 | |
288 | if (len < bLength) { |
289 | return -1; |
290 | } |
291 | |
292 | d->bLength = bLength; |
293 | d->bDescriptorType = USB_DT_DEVICE_CAPABILITY; |
294 | d->u.cap.bDevCapabilityType = USB_DEV_CAP_SUPERSPEED; |
295 | |
296 | d->u.cap.u.super.bmAttributes = 0; |
297 | d->u.cap.u.super.wSpeedsSupported_lo = 0; |
298 | d->u.cap.u.super.wSpeedsSupported_hi = 0; |
299 | d->u.cap.u.super.bFunctionalitySupport = 0; |
300 | d->u.cap.u.super.bU1DevExitLat = 0x0a; |
301 | d->u.cap.u.super.wU2DevExitLat_lo = 0x20; |
302 | d->u.cap.u.super.wU2DevExitLat_hi = 0; |
303 | |
304 | if (desc->full) { |
305 | d->u.cap.u.super.wSpeedsSupported_lo |= (1 << 1); |
306 | d->u.cap.u.super.bFunctionalitySupport = 1; |
307 | } |
308 | if (desc->high) { |
309 | d->u.cap.u.super.wSpeedsSupported_lo |= (1 << 2); |
310 | if (!d->u.cap.u.super.bFunctionalitySupport) { |
311 | d->u.cap.u.super.bFunctionalitySupport = 2; |
312 | } |
313 | } |
314 | if (desc->super) { |
315 | d->u.cap.u.super.wSpeedsSupported_lo |= (1 << 3); |
316 | if (!d->u.cap.u.super.bFunctionalitySupport) { |
317 | d->u.cap.u.super.bFunctionalitySupport = 3; |
318 | } |
319 | } |
320 | |
321 | return bLength; |
322 | } |
323 | |
324 | static int usb_desc_bos(const USBDesc *desc, uint8_t *dest, size_t len) |
325 | { |
326 | uint8_t bLength = 0x05; |
327 | uint16_t wTotalLength = 0; |
328 | uint8_t bNumDeviceCaps = 0; |
329 | USBDescriptor *d = (void *)dest; |
330 | int rc; |
331 | |
332 | if (len < bLength) { |
333 | return -1; |
334 | } |
335 | |
336 | d->bLength = bLength; |
337 | d->bDescriptorType = USB_DT_BOS; |
338 | |
339 | wTotalLength += bLength; |
340 | |
341 | if (desc->high != NULL) { |
342 | rc = usb_desc_cap_usb2_ext(desc, dest + wTotalLength, |
343 | len - wTotalLength); |
344 | if (rc < 0) { |
345 | return rc; |
346 | } |
347 | wTotalLength += rc; |
348 | bNumDeviceCaps++; |
349 | } |
350 | |
351 | if (desc->super != NULL) { |
352 | rc = usb_desc_cap_super(desc, dest + wTotalLength, |
353 | len - wTotalLength); |
354 | if (rc < 0) { |
355 | return rc; |
356 | } |
357 | wTotalLength += rc; |
358 | bNumDeviceCaps++; |
359 | } |
360 | |
361 | d->u.bos.wTotalLength_lo = usb_lo(wTotalLength); |
362 | d->u.bos.wTotalLength_hi = usb_hi(wTotalLength); |
363 | d->u.bos.bNumDeviceCaps = bNumDeviceCaps; |
364 | return wTotalLength; |
365 | } |
366 | |
367 | /* ------------------------------------------------------------------ */ |
368 | |
369 | static void usb_desc_ep_init(USBDevice *dev) |
370 | { |
371 | const USBDescIface *iface; |
372 | int i, e, pid, ep; |
373 | |
374 | usb_ep_init(dev); |
375 | for (i = 0; i < dev->ninterfaces; i++) { |
376 | iface = dev->ifaces[i]; |
377 | if (iface == NULL) { |
378 | continue; |
379 | } |
380 | for (e = 0; e < iface->bNumEndpoints; e++) { |
381 | pid = (iface->eps[e].bEndpointAddress & USB_DIR_IN) ? |
382 | USB_TOKEN_IN : USB_TOKEN_OUT; |
383 | ep = iface->eps[e].bEndpointAddress & 0x0f; |
384 | usb_ep_set_type(dev, pid, ep, iface->eps[e].bmAttributes & 0x03); |
385 | usb_ep_set_ifnum(dev, pid, ep, iface->bInterfaceNumber); |
386 | usb_ep_set_max_packet_size(dev, pid, ep, |
387 | iface->eps[e].wMaxPacketSize); |
388 | usb_ep_set_max_streams(dev, pid, ep, |
389 | iface->eps[e].bmAttributes_super); |
390 | } |
391 | } |
392 | } |
393 | |
394 | static const USBDescIface *usb_desc_find_interface(USBDevice *dev, |
395 | int nif, int alt) |
396 | { |
397 | const USBDescIface *iface; |
398 | int g, i; |
399 | |
400 | if (!dev->config) { |
401 | return NULL; |
402 | } |
403 | for (g = 0; g < dev->config->nif_groups; g++) { |
404 | for (i = 0; i < dev->config->if_groups[g].nif; i++) { |
405 | iface = &dev->config->if_groups[g].ifs[i]; |
406 | if (iface->bInterfaceNumber == nif && |
407 | iface->bAlternateSetting == alt) { |
408 | return iface; |
409 | } |
410 | } |
411 | } |
412 | for (i = 0; i < dev->config->nif; i++) { |
413 | iface = &dev->config->ifs[i]; |
414 | if (iface->bInterfaceNumber == nif && |
415 | iface->bAlternateSetting == alt) { |
416 | return iface; |
417 | } |
418 | } |
419 | return NULL; |
420 | } |
421 | |
422 | static int usb_desc_set_interface(USBDevice *dev, int index, int value) |
423 | { |
424 | const USBDescIface *iface; |
425 | int old; |
426 | |
427 | iface = usb_desc_find_interface(dev, index, value); |
428 | if (iface == NULL) { |
429 | return -1; |
430 | } |
431 | |
432 | old = dev->altsetting[index]; |
433 | dev->altsetting[index] = value; |
434 | dev->ifaces[index] = iface; |
435 | usb_desc_ep_init(dev); |
436 | |
437 | if (old != value) { |
438 | usb_device_set_interface(dev, index, old, value); |
439 | } |
440 | return 0; |
441 | } |
442 | |
443 | static int usb_desc_set_config(USBDevice *dev, int value) |
444 | { |
445 | int i; |
446 | |
447 | if (value == 0) { |
448 | dev->configuration = 0; |
449 | dev->ninterfaces = 0; |
450 | dev->config = NULL; |
451 | } else { |
452 | for (i = 0; i < dev->device->bNumConfigurations; i++) { |
453 | if (dev->device->confs[i].bConfigurationValue == value) { |
454 | dev->configuration = value; |
455 | dev->ninterfaces = dev->device->confs[i].bNumInterfaces; |
456 | dev->config = dev->device->confs + i; |
457 | assert(dev->ninterfaces <= USB_MAX_INTERFACES); |
458 | } |
459 | } |
460 | if (i < dev->device->bNumConfigurations) { |
461 | return -1; |
462 | } |
463 | } |
464 | |
465 | for (i = 0; i < dev->ninterfaces; i++) { |
466 | usb_desc_set_interface(dev, i, 0); |
467 | } |
468 | for (; i < USB_MAX_INTERFACES; i++) { |
469 | dev->altsetting[i] = 0; |
470 | dev->ifaces[i] = NULL; |
471 | } |
472 | |
473 | return 0; |
474 | } |
475 | |
476 | static void usb_desc_setdefaults(USBDevice *dev) |
477 | { |
478 | const USBDesc *desc = usb_device_get_usb_desc(dev); |
479 | |
480 | assert(desc != NULL); |
481 | switch (dev->speed) { |
482 | case USB_SPEED_LOW: |
483 | case USB_SPEED_FULL: |
484 | dev->device = desc->full; |
485 | break; |
486 | case USB_SPEED_HIGH: |
487 | dev->device = desc->high; |
488 | break; |
489 | case USB_SPEED_SUPER: |
490 | dev->device = desc->super; |
491 | break; |
492 | } |
493 | usb_desc_set_config(dev, 0); |
494 | } |
495 | |
496 | void usb_desc_init(USBDevice *dev) |
497 | { |
498 | const USBDesc *desc = usb_device_get_usb_desc(dev); |
499 | |
500 | assert(desc != NULL); |
501 | dev->speed = USB_SPEED_FULL; |
502 | dev->speedmask = 0; |
503 | if (desc->full) { |
504 | dev->speedmask |= USB_SPEED_MASK_FULL; |
505 | } |
506 | if (desc->high) { |
507 | dev->speedmask |= USB_SPEED_MASK_HIGH; |
508 | } |
509 | if (desc->super) { |
510 | dev->speedmask |= USB_SPEED_MASK_SUPER; |
511 | } |
512 | if (desc->msos && (dev->flags & (1 << USB_DEV_FLAG_MSOS_DESC_ENABLE))) { |
513 | dev->flags |= (1 << USB_DEV_FLAG_MSOS_DESC_IN_USE); |
514 | usb_desc_set_string(dev, 0xee, "MSFT100Q" ); |
515 | } |
516 | usb_desc_setdefaults(dev); |
517 | } |
518 | |
519 | void usb_desc_attach(USBDevice *dev) |
520 | { |
521 | usb_desc_setdefaults(dev); |
522 | } |
523 | |
524 | void usb_desc_set_string(USBDevice *dev, uint8_t index, const char *str) |
525 | { |
526 | USBDescString *s; |
527 | |
528 | QLIST_FOREACH(s, &dev->strings, next) { |
529 | if (s->index == index) { |
530 | break; |
531 | } |
532 | } |
533 | if (s == NULL) { |
534 | s = g_malloc0(sizeof(*s)); |
535 | s->index = index; |
536 | QLIST_INSERT_HEAD(&dev->strings, s, next); |
537 | } |
538 | g_free(s->str); |
539 | s->str = g_strdup(str); |
540 | } |
541 | |
542 | /* |
543 | * This function creates a serial number for a usb device. |
544 | * The serial number should: |
545 | * (a) Be unique within the virtual machine. |
546 | * (b) Be constant, so you don't get a new one each |
547 | * time the guest is started. |
548 | * So we are using the physical location to generate a serial number |
549 | * from it. It has three pieces: First a fixed, device-specific |
550 | * prefix. Second the device path of the host controller (which is |
551 | * the pci address in most cases). Third the physical port path. |
552 | * Results in serial numbers like this: "314159-0000:00:1d.7-3". |
553 | */ |
554 | void usb_desc_create_serial(USBDevice *dev) |
555 | { |
556 | DeviceState *hcd = dev->qdev.parent_bus->parent; |
557 | const USBDesc *desc = usb_device_get_usb_desc(dev); |
558 | int index = desc->id.iSerialNumber; |
559 | char *path, *serial; |
560 | |
561 | if (dev->serial) { |
562 | /* 'serial' usb bus property has priority if present */ |
563 | usb_desc_set_string(dev, index, dev->serial); |
564 | return; |
565 | } |
566 | |
567 | assert(index != 0 && desc->str[index] != NULL); |
568 | path = qdev_get_dev_path(hcd); |
569 | if (path) { |
570 | serial = g_strdup_printf("%s-%s-%s" , desc->str[index], |
571 | path, dev->port->path); |
572 | } else { |
573 | serial = g_strdup_printf("%s-%s" , desc->str[index], dev->port->path); |
574 | } |
575 | usb_desc_set_string(dev, index, serial); |
576 | g_free(path); |
577 | g_free(serial); |
578 | } |
579 | |
580 | const char *usb_desc_get_string(USBDevice *dev, uint8_t index) |
581 | { |
582 | USBDescString *s; |
583 | |
584 | QLIST_FOREACH(s, &dev->strings, next) { |
585 | if (s->index == index) { |
586 | return s->str; |
587 | } |
588 | } |
589 | return NULL; |
590 | } |
591 | |
592 | int usb_desc_string(USBDevice *dev, int index, uint8_t *dest, size_t len) |
593 | { |
594 | uint8_t bLength, pos, i; |
595 | const char *str; |
596 | |
597 | if (len < 4) { |
598 | return -1; |
599 | } |
600 | |
601 | if (index == 0) { |
602 | /* language ids */ |
603 | dest[0] = 4; |
604 | dest[1] = USB_DT_STRING; |
605 | dest[2] = 0x09; |
606 | dest[3] = 0x04; |
607 | return 4; |
608 | } |
609 | |
610 | str = usb_desc_get_string(dev, index); |
611 | if (str == NULL) { |
612 | str = usb_device_get_usb_desc(dev)->str[index]; |
613 | if (str == NULL) { |
614 | return 0; |
615 | } |
616 | } |
617 | |
618 | bLength = strlen(str) * 2 + 2; |
619 | dest[0] = bLength; |
620 | dest[1] = USB_DT_STRING; |
621 | i = 0; pos = 2; |
622 | while (pos+1 < bLength && pos+1 < len) { |
623 | dest[pos++] = str[i++]; |
624 | dest[pos++] = 0; |
625 | } |
626 | return pos; |
627 | } |
628 | |
629 | int usb_desc_get_descriptor(USBDevice *dev, USBPacket *p, |
630 | int value, uint8_t *dest, size_t len) |
631 | { |
632 | bool msos = (dev->flags & (1 << USB_DEV_FLAG_MSOS_DESC_IN_USE)); |
633 | const USBDesc *desc = usb_device_get_usb_desc(dev); |
634 | const USBDescDevice *other_dev; |
635 | uint8_t buf[256]; |
636 | uint8_t type = value >> 8; |
637 | uint8_t index = value & 0xff; |
638 | int flags, ret = -1; |
639 | |
640 | if (dev->speed == USB_SPEED_HIGH) { |
641 | other_dev = usb_device_get_usb_desc(dev)->full; |
642 | } else { |
643 | other_dev = usb_device_get_usb_desc(dev)->high; |
644 | } |
645 | |
646 | flags = 0; |
647 | if (dev->device->bcdUSB >= 0x0300) { |
648 | flags |= USB_DESC_FLAG_SUPER; |
649 | } |
650 | |
651 | switch(type) { |
652 | case USB_DT_DEVICE: |
653 | ret = usb_desc_device(&desc->id, dev->device, msos, buf, sizeof(buf)); |
654 | trace_usb_desc_device(dev->addr, len, ret); |
655 | break; |
656 | case USB_DT_CONFIG: |
657 | if (index < dev->device->bNumConfigurations) { |
658 | ret = usb_desc_config(dev->device->confs + index, flags, |
659 | buf, sizeof(buf)); |
660 | } |
661 | trace_usb_desc_config(dev->addr, index, len, ret); |
662 | break; |
663 | case USB_DT_STRING: |
664 | ret = usb_desc_string(dev, index, buf, sizeof(buf)); |
665 | trace_usb_desc_string(dev->addr, index, len, ret); |
666 | break; |
667 | case USB_DT_DEVICE_QUALIFIER: |
668 | if (other_dev != NULL) { |
669 | ret = usb_desc_device_qualifier(other_dev, buf, sizeof(buf)); |
670 | } |
671 | trace_usb_desc_device_qualifier(dev->addr, len, ret); |
672 | break; |
673 | case USB_DT_OTHER_SPEED_CONFIG: |
674 | if (other_dev != NULL && index < other_dev->bNumConfigurations) { |
675 | ret = usb_desc_config(other_dev->confs + index, flags, |
676 | buf, sizeof(buf)); |
677 | buf[0x01] = USB_DT_OTHER_SPEED_CONFIG; |
678 | } |
679 | trace_usb_desc_other_speed_config(dev->addr, index, len, ret); |
680 | break; |
681 | case USB_DT_BOS: |
682 | ret = usb_desc_bos(desc, buf, sizeof(buf)); |
683 | trace_usb_desc_bos(dev->addr, len, ret); |
684 | break; |
685 | |
686 | case USB_DT_DEBUG: |
687 | /* ignore silently */ |
688 | break; |
689 | |
690 | default: |
691 | fprintf(stderr, "%s: %d unknown type %d (len %zd)\n" , __func__, |
692 | dev->addr, type, len); |
693 | break; |
694 | } |
695 | |
696 | if (ret > 0) { |
697 | if (ret > len) { |
698 | ret = len; |
699 | } |
700 | memcpy(dest, buf, ret); |
701 | p->actual_length = ret; |
702 | ret = 0; |
703 | } |
704 | return ret; |
705 | } |
706 | |
707 | int usb_desc_handle_control(USBDevice *dev, USBPacket *p, |
708 | int request, int value, int index, int length, uint8_t *data) |
709 | { |
710 | bool msos = (dev->flags & (1 << USB_DEV_FLAG_MSOS_DESC_IN_USE)); |
711 | const USBDesc *desc = usb_device_get_usb_desc(dev); |
712 | int ret = -1; |
713 | |
714 | assert(desc != NULL); |
715 | switch(request) { |
716 | case DeviceOutRequest | USB_REQ_SET_ADDRESS: |
717 | dev->addr = value; |
718 | trace_usb_set_addr(dev->addr); |
719 | ret = 0; |
720 | break; |
721 | |
722 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
723 | ret = usb_desc_get_descriptor(dev, p, value, data, length); |
724 | break; |
725 | |
726 | case DeviceRequest | USB_REQ_GET_CONFIGURATION: |
727 | /* |
728 | * 9.4.2: 0 should be returned if the device is unconfigured, otherwise |
729 | * the non zero value of bConfigurationValue. |
730 | */ |
731 | data[0] = dev->config ? dev->config->bConfigurationValue : 0; |
732 | p->actual_length = 1; |
733 | ret = 0; |
734 | break; |
735 | case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: |
736 | ret = usb_desc_set_config(dev, value); |
737 | trace_usb_set_config(dev->addr, value, ret); |
738 | break; |
739 | |
740 | case DeviceRequest | USB_REQ_GET_STATUS: { |
741 | const USBDescConfig *config = dev->config ? |
742 | dev->config : &dev->device->confs[0]; |
743 | |
744 | data[0] = 0; |
745 | /* |
746 | * Default state: Device behavior when this request is received while |
747 | * the device is in the Default state is not specified. |
748 | * We return the same value that a configured device would return if |
749 | * it used the first configuration. |
750 | */ |
751 | if (config->bmAttributes & USB_CFG_ATT_SELFPOWER) { |
752 | data[0] |= 1 << USB_DEVICE_SELF_POWERED; |
753 | } |
754 | if (dev->remote_wakeup) { |
755 | data[0] |= 1 << USB_DEVICE_REMOTE_WAKEUP; |
756 | } |
757 | data[1] = 0x00; |
758 | p->actual_length = 2; |
759 | ret = 0; |
760 | break; |
761 | } |
762 | case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: |
763 | if (value == USB_DEVICE_REMOTE_WAKEUP) { |
764 | dev->remote_wakeup = 0; |
765 | ret = 0; |
766 | } |
767 | trace_usb_clear_device_feature(dev->addr, value, ret); |
768 | break; |
769 | case DeviceOutRequest | USB_REQ_SET_FEATURE: |
770 | if (value == USB_DEVICE_REMOTE_WAKEUP) { |
771 | dev->remote_wakeup = 1; |
772 | ret = 0; |
773 | } |
774 | trace_usb_set_device_feature(dev->addr, value, ret); |
775 | break; |
776 | |
777 | case DeviceOutRequest | USB_REQ_SET_SEL: |
778 | case DeviceOutRequest | USB_REQ_SET_ISOCH_DELAY: |
779 | if (dev->speed == USB_SPEED_SUPER) { |
780 | ret = 0; |
781 | } |
782 | break; |
783 | |
784 | case InterfaceRequest | USB_REQ_GET_INTERFACE: |
785 | if (index < 0 || index >= dev->ninterfaces) { |
786 | break; |
787 | } |
788 | data[0] = dev->altsetting[index]; |
789 | p->actual_length = 1; |
790 | ret = 0; |
791 | break; |
792 | case InterfaceOutRequest | USB_REQ_SET_INTERFACE: |
793 | ret = usb_desc_set_interface(dev, index, value); |
794 | trace_usb_set_interface(dev->addr, index, value, ret); |
795 | break; |
796 | |
797 | case VendorDeviceRequest | 'Q': |
798 | if (msos) { |
799 | ret = usb_desc_msos(desc, p, index, data, length); |
800 | trace_usb_desc_msos(dev->addr, index, length, ret); |
801 | } |
802 | break; |
803 | case VendorInterfaceRequest | 'Q': |
804 | if (msos) { |
805 | ret = usb_desc_msos(desc, p, index, data, length); |
806 | trace_usb_desc_msos(dev->addr, index, length, ret); |
807 | } |
808 | break; |
809 | |
810 | } |
811 | return ret; |
812 | } |
813 | |