2 #include <linux/usb/ch9.h>
3 #include <linux/usb/hcd.h>
4 #include <linux/usb/quirks.h>
5 #include <linux/module.h>
6 #include <linux/slab.h>
7 #include <linux/device.h>
8 #include <asm/byteorder.h>
12 #define USB_MAXALTSETTING 128 /* Hard limit */
14 #define USB_MAXCONFIG 8 /* Arbitrary limit */
17 static inline const char *plural(int n)
19 return (n == 1 ? "" : "s");
22 static int find_next_descriptor(unsigned char *buffer, int size,
23 int dt1, int dt2, int *num_skipped)
25 struct usb_descriptor_header *h;
27 unsigned char *buffer0 = buffer;
29 /* Find the next descriptor of type dt1 or dt2 */
31 h = (struct usb_descriptor_header *) buffer;
32 if (h->bDescriptorType == dt1 || h->bDescriptorType == dt2)
39 /* Store the number of descriptors skipped and return the
40 * number of bytes skipped */
43 return buffer - buffer0;
46 static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno,
47 int inum, int asnum, struct usb_host_endpoint *ep,
48 unsigned char *buffer, int size)
50 struct usb_ss_ep_comp_descriptor *desc;
53 /* The SuperSpeed endpoint companion descriptor is supposed to
54 * be the first thing immediately following the endpoint descriptor.
56 desc = (struct usb_ss_ep_comp_descriptor *) buffer;
57 if (desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP ||
58 size < USB_DT_SS_EP_COMP_SIZE) {
59 dev_warn(ddev, "No SuperSpeed endpoint companion for config %d "
60 " interface %d altsetting %d ep %d: "
61 "using minimum values\n",
62 cfgno, inum, asnum, ep->desc.bEndpointAddress);
64 /* Fill in some default values.
65 * Leave bmAttributes as zero, which will mean no streams for
66 * bulk, and isoc won't support multiple bursts of packets.
67 * With bursts of only one packet, and a Mult of 1, the max
68 * amount of data moved per endpoint service interval is one
71 ep->ss_ep_comp.bLength = USB_DT_SS_EP_COMP_SIZE;
72 ep->ss_ep_comp.bDescriptorType = USB_DT_SS_ENDPOINT_COMP;
73 if (usb_endpoint_xfer_isoc(&ep->desc) ||
74 usb_endpoint_xfer_int(&ep->desc))
75 ep->ss_ep_comp.wBytesPerInterval =
76 ep->desc.wMaxPacketSize;
80 memcpy(&ep->ss_ep_comp, desc, USB_DT_SS_EP_COMP_SIZE);
82 /* Check the various values */
83 if (usb_endpoint_xfer_control(&ep->desc) && desc->bMaxBurst != 0) {
84 dev_warn(ddev, "Control endpoint with bMaxBurst = %d in "
85 "config %d interface %d altsetting %d ep %d: "
86 "setting to zero\n", desc->bMaxBurst,
87 cfgno, inum, asnum, ep->desc.bEndpointAddress);
88 ep->ss_ep_comp.bMaxBurst = 0;
89 } else if (desc->bMaxBurst > 15) {
90 dev_warn(ddev, "Endpoint with bMaxBurst = %d in "
91 "config %d interface %d altsetting %d ep %d: "
92 "setting to 15\n", desc->bMaxBurst,
93 cfgno, inum, asnum, ep->desc.bEndpointAddress);
94 ep->ss_ep_comp.bMaxBurst = 15;
97 if ((usb_endpoint_xfer_control(&ep->desc) ||
98 usb_endpoint_xfer_int(&ep->desc)) &&
99 desc->bmAttributes != 0) {
100 dev_warn(ddev, "%s endpoint with bmAttributes = %d in "
101 "config %d interface %d altsetting %d ep %d: "
103 usb_endpoint_xfer_control(&ep->desc) ? "Control" : "Bulk",
105 cfgno, inum, asnum, ep->desc.bEndpointAddress);
106 ep->ss_ep_comp.bmAttributes = 0;
107 } else if (usb_endpoint_xfer_bulk(&ep->desc) &&
108 desc->bmAttributes > 16) {
109 dev_warn(ddev, "Bulk endpoint with more than 65536 streams in "
110 "config %d interface %d altsetting %d ep %d: "
112 cfgno, inum, asnum, ep->desc.bEndpointAddress);
113 ep->ss_ep_comp.bmAttributes = 16;
114 } else if (usb_endpoint_xfer_isoc(&ep->desc) &&
115 USB_SS_MULT(desc->bmAttributes) > 3) {
116 dev_warn(ddev, "Isoc endpoint has Mult of %d in "
117 "config %d interface %d altsetting %d ep %d: "
118 "setting to 3\n", desc->bmAttributes + 1,
119 cfgno, inum, asnum, ep->desc.bEndpointAddress);
120 ep->ss_ep_comp.bmAttributes = 2;
123 if (usb_endpoint_xfer_isoc(&ep->desc))
124 max_tx = (desc->bMaxBurst + 1) *
125 (USB_SS_MULT(desc->bmAttributes)) *
126 usb_endpoint_maxp(&ep->desc);
127 else if (usb_endpoint_xfer_int(&ep->desc))
128 max_tx = usb_endpoint_maxp(&ep->desc) *
129 (desc->bMaxBurst + 1);
132 if (le16_to_cpu(desc->wBytesPerInterval) > max_tx) {
133 dev_warn(ddev, "%s endpoint with wBytesPerInterval of %d in "
134 "config %d interface %d altsetting %d ep %d: "
136 usb_endpoint_xfer_isoc(&ep->desc) ? "Isoc" : "Int",
137 le16_to_cpu(desc->wBytesPerInterval),
138 cfgno, inum, asnum, ep->desc.bEndpointAddress,
140 ep->ss_ep_comp.wBytesPerInterval = cpu_to_le16(max_tx);
144 static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
145 int asnum, struct usb_host_interface *ifp, int num_ep,
146 unsigned char *buffer, int size)
148 unsigned char *buffer0 = buffer;
149 struct usb_endpoint_descriptor *d;
150 struct usb_host_endpoint *endpoint;
153 d = (struct usb_endpoint_descriptor *) buffer;
154 buffer += d->bLength;
157 if (d->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE)
158 n = USB_DT_ENDPOINT_AUDIO_SIZE;
159 else if (d->bLength >= USB_DT_ENDPOINT_SIZE)
160 n = USB_DT_ENDPOINT_SIZE;
162 dev_warn(ddev, "config %d interface %d altsetting %d has an "
163 "invalid endpoint descriptor of length %d, skipping\n",
164 cfgno, inum, asnum, d->bLength);
165 goto skip_to_next_endpoint_or_interface_descriptor;
168 i = d->bEndpointAddress & ~USB_ENDPOINT_DIR_MASK;
169 if (i >= 16 || i == 0) {
170 dev_warn(ddev, "config %d interface %d altsetting %d has an "
171 "invalid endpoint with address 0x%X, skipping\n",
172 cfgno, inum, asnum, d->bEndpointAddress);
173 goto skip_to_next_endpoint_or_interface_descriptor;
176 /* Only store as many endpoints as we have room for */
177 if (ifp->desc.bNumEndpoints >= num_ep)
178 goto skip_to_next_endpoint_or_interface_descriptor;
180 endpoint = &ifp->endpoint[ifp->desc.bNumEndpoints];
181 ++ifp->desc.bNumEndpoints;
183 memcpy(&endpoint->desc, d, n);
184 INIT_LIST_HEAD(&endpoint->urb_list);
186 /* Fix up bInterval values outside the legal range. Use 32 ms if no
187 * proper value can be guessed. */
188 i = 0; /* i = min, j = max, n = default */
190 if (usb_endpoint_xfer_int(d)) {
192 switch (to_usb_device(ddev)->speed) {
193 case USB_SPEED_SUPER:
195 /* Many device manufacturers are using full-speed
196 * bInterval values in high-speed interrupt endpoint
197 * descriptors. Try to fix those and fall back to a
198 * 32 ms default value otherwise. */
199 n = fls(d->bInterval*8);
201 n = 9; /* 32 ms = 2^(9-1) uframes */
205 * Adjust bInterval for quirked devices.
206 * This quirk fixes bIntervals reported in
207 * linear microframes.
209 if (to_usb_device(ddev)->quirks &
210 USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL) {
211 n = clamp(fls(d->bInterval), i, j);
215 default: /* USB_SPEED_FULL or _LOW */
216 /* For low-speed, 10 ms is the official minimum.
217 * But some "overclocked" devices might want faster
218 * polling so we'll allow it. */
222 } else if (usb_endpoint_xfer_isoc(d)) {
225 switch (to_usb_device(ddev)->speed) {
227 n = 9; /* 32 ms = 2^(9-1) uframes */
229 default: /* USB_SPEED_FULL */
230 n = 6; /* 32 ms = 2^(6-1) frames */
234 if (d->bInterval < i || d->bInterval > j) {
235 dev_warn(ddev, "config %d interface %d altsetting %d "
236 "endpoint 0x%X has an invalid bInterval %d, "
239 d->bEndpointAddress, d->bInterval, n);
240 endpoint->desc.bInterval = n;
243 /* Some buggy low-speed devices have Bulk endpoints, which is
244 * explicitly forbidden by the USB spec. In an attempt to make
245 * them usable, we will try treating them as Interrupt endpoints.
247 if (to_usb_device(ddev)->speed == USB_SPEED_LOW &&
248 usb_endpoint_xfer_bulk(d)) {
249 dev_warn(ddev, "config %d interface %d altsetting %d "
250 "endpoint 0x%X is Bulk; changing to Interrupt\n",
251 cfgno, inum, asnum, d->bEndpointAddress);
252 endpoint->desc.bmAttributes = USB_ENDPOINT_XFER_INT;
253 endpoint->desc.bInterval = 1;
254 if (usb_endpoint_maxp(&endpoint->desc) > 8)
255 endpoint->desc.wMaxPacketSize = cpu_to_le16(8);
259 * Some buggy high speed devices have bulk endpoints using
260 * maxpacket sizes other than 512. High speed HCDs may not
261 * be able to handle that particular bug, so let's warn...
263 if (to_usb_device(ddev)->speed == USB_SPEED_HIGH
264 && usb_endpoint_xfer_bulk(d)) {
267 maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff;
269 dev_warn(ddev, "config %d interface %d altsetting %d "
270 "bulk endpoint 0x%X has invalid maxpacket %d\n",
271 cfgno, inum, asnum, d->bEndpointAddress,
275 /* Parse a possible SuperSpeed endpoint companion descriptor */
276 if (to_usb_device(ddev)->speed == USB_SPEED_SUPER)
277 usb_parse_ss_endpoint_companion(ddev, cfgno,
278 inum, asnum, endpoint, buffer, size);
280 /* Skip over any Class Specific or Vendor Specific descriptors;
281 * find the next endpoint or interface descriptor */
282 endpoint->extra = buffer;
283 i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
284 USB_DT_INTERFACE, &n);
285 endpoint->extralen = i;
286 retval = buffer - buffer0 + i;
288 dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
289 n, plural(n), "endpoint");
292 skip_to_next_endpoint_or_interface_descriptor:
293 i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
294 USB_DT_INTERFACE, NULL);
295 return buffer - buffer0 + i;
298 void usb_release_interface_cache(struct kref *ref)
300 struct usb_interface_cache *intfc = ref_to_usb_interface_cache(ref);
303 for (j = 0; j < intfc->num_altsetting; j++) {
304 struct usb_host_interface *alt = &intfc->altsetting[j];
306 kfree(alt->endpoint);
312 static int usb_parse_interface(struct device *ddev, int cfgno,
313 struct usb_host_config *config, unsigned char *buffer, int size,
314 u8 inums[], u8 nalts[])
316 unsigned char *buffer0 = buffer;
317 struct usb_interface_descriptor *d;
319 struct usb_interface_cache *intfc;
320 struct usb_host_interface *alt;
323 int num_ep, num_ep_orig;
325 d = (struct usb_interface_descriptor *) buffer;
326 buffer += d->bLength;
329 if (d->bLength < USB_DT_INTERFACE_SIZE)
330 goto skip_to_next_interface_descriptor;
332 /* Which interface entry is this? */
334 inum = d->bInterfaceNumber;
335 for (i = 0; i < config->desc.bNumInterfaces; ++i) {
336 if (inums[i] == inum) {
337 intfc = config->intf_cache[i];
341 if (!intfc || intfc->num_altsetting >= nalts[i])
342 goto skip_to_next_interface_descriptor;
344 /* Check for duplicate altsetting entries */
345 asnum = d->bAlternateSetting;
346 for ((i = 0, alt = &intfc->altsetting[0]);
347 i < intfc->num_altsetting;
349 if (alt->desc.bAlternateSetting == asnum) {
350 dev_warn(ddev, "Duplicate descriptor for config %d "
351 "interface %d altsetting %d, skipping\n",
353 goto skip_to_next_interface_descriptor;
357 ++intfc->num_altsetting;
358 memcpy(&alt->desc, d, USB_DT_INTERFACE_SIZE);
360 /* Skip over any Class Specific or Vendor Specific descriptors;
361 * find the first endpoint or interface descriptor */
363 i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
364 USB_DT_INTERFACE, &n);
367 dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
368 n, plural(n), "interface");
372 /* Allocate space for the right(?) number of endpoints */
373 num_ep = num_ep_orig = alt->desc.bNumEndpoints;
374 alt->desc.bNumEndpoints = 0; /* Use as a counter */
375 if (num_ep > USB_MAXENDPOINTS) {
376 dev_warn(ddev, "too many endpoints for config %d interface %d "
377 "altsetting %d: %d, using maximum allowed: %d\n",
378 cfgno, inum, asnum, num_ep, USB_MAXENDPOINTS);
379 num_ep = USB_MAXENDPOINTS;
383 /* Can't allocate 0 bytes */
384 len = sizeof(struct usb_host_endpoint) * num_ep;
385 alt->endpoint = kzalloc(len, GFP_KERNEL);
390 /* Parse all the endpoint descriptors */
393 if (((struct usb_descriptor_header *) buffer)->bDescriptorType
396 retval = usb_parse_endpoint(ddev, cfgno, inum, asnum, alt,
397 num_ep, buffer, size);
406 if (n != num_ep_orig)
407 dev_warn(ddev, "config %d interface %d altsetting %d has %d "
408 "endpoint descriptor%s, different from the interface "
409 "descriptor's value: %d\n",
410 cfgno, inum, asnum, n, plural(n), num_ep_orig);
411 return buffer - buffer0;
413 skip_to_next_interface_descriptor:
414 i = find_next_descriptor(buffer, size, USB_DT_INTERFACE,
415 USB_DT_INTERFACE, NULL);
416 return buffer - buffer0 + i;
419 static int usb_parse_configuration(struct usb_device *dev, int cfgidx,
420 struct usb_host_config *config, unsigned char *buffer, int size)
422 struct device *ddev = &dev->dev;
423 unsigned char *buffer0 = buffer;
425 int nintf, nintf_orig;
427 struct usb_interface_cache *intfc;
428 unsigned char *buffer2;
430 struct usb_descriptor_header *header;
432 u8 inums[USB_MAXINTERFACES], nalts[USB_MAXINTERFACES];
433 unsigned iad_num = 0;
435 memcpy(&config->desc, buffer, USB_DT_CONFIG_SIZE);
436 if (config->desc.bDescriptorType != USB_DT_CONFIG ||
437 config->desc.bLength < USB_DT_CONFIG_SIZE ||
438 config->desc.bLength > size) {
439 dev_err(ddev, "invalid descriptor for config index %d: "
440 "type = 0x%X, length = %d\n", cfgidx,
441 config->desc.bDescriptorType, config->desc.bLength);
444 cfgno = config->desc.bConfigurationValue;
446 buffer += config->desc.bLength;
447 size -= config->desc.bLength;
449 nintf = nintf_orig = config->desc.bNumInterfaces;
450 if (nintf > USB_MAXINTERFACES) {
451 dev_warn(ddev, "config %d has too many interfaces: %d, "
452 "using maximum allowed: %d\n",
453 cfgno, nintf, USB_MAXINTERFACES);
454 nintf = USB_MAXINTERFACES;
457 /* Go through the descriptors, checking their length and counting the
458 * number of altsettings for each interface */
460 for ((buffer2 = buffer, size2 = size);
462 (buffer2 += header->bLength, size2 -= header->bLength)) {
464 if (size2 < sizeof(struct usb_descriptor_header)) {
465 dev_warn(ddev, "config %d descriptor has %d excess "
466 "byte%s, ignoring\n",
467 cfgno, size2, plural(size2));
471 header = (struct usb_descriptor_header *) buffer2;
472 if ((header->bLength > size2) || (header->bLength < 2)) {
473 dev_warn(ddev, "config %d has an invalid descriptor "
474 "of length %d, skipping remainder of the config\n",
475 cfgno, header->bLength);
479 if (header->bDescriptorType == USB_DT_INTERFACE) {
480 struct usb_interface_descriptor *d;
483 d = (struct usb_interface_descriptor *) header;
484 if (d->bLength < USB_DT_INTERFACE_SIZE) {
485 dev_warn(ddev, "config %d has an invalid "
486 "interface descriptor of length %d, "
487 "skipping\n", cfgno, d->bLength);
491 inum = d->bInterfaceNumber;
493 if ((dev->quirks & USB_QUIRK_HONOR_BNUMINTERFACES) &&
495 dev_warn(ddev, "config %d has more interface "
496 "descriptors, than it declares in "
497 "bNumInterfaces, ignoring interface "
498 "number: %d\n", cfgno, inum);
502 if (inum >= nintf_orig)
503 dev_warn(ddev, "config %d has an invalid "
504 "interface number: %d but max is %d\n",
505 cfgno, inum, nintf_orig - 1);
507 /* Have we already encountered this interface?
508 * Count its altsettings */
509 for (i = 0; i < n; ++i) {
510 if (inums[i] == inum)
516 } else if (n < USB_MAXINTERFACES) {
522 } else if (header->bDescriptorType ==
523 USB_DT_INTERFACE_ASSOCIATION) {
524 if (iad_num == USB_MAXIADS) {
525 dev_warn(ddev, "found more Interface "
526 "Association Descriptors "
527 "than allocated for in "
528 "configuration %d\n", cfgno);
530 config->intf_assoc[iad_num] =
531 (struct usb_interface_assoc_descriptor
536 } else if (header->bDescriptorType == USB_DT_DEVICE ||
537 header->bDescriptorType == USB_DT_CONFIG)
538 dev_warn(ddev, "config %d contains an unexpected "
539 "descriptor of type 0x%X, skipping\n",
540 cfgno, header->bDescriptorType);
542 } /* for ((buffer2 = buffer, size2 = size); ...) */
543 size = buffer2 - buffer;
544 config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0);
547 dev_warn(ddev, "config %d has %d interface%s, different from "
548 "the descriptor's value: %d\n",
549 cfgno, n, plural(n), nintf_orig);
551 dev_warn(ddev, "config %d has no interfaces?\n", cfgno);
552 config->desc.bNumInterfaces = nintf = n;
554 /* Check for missing interface numbers */
555 for (i = 0; i < nintf; ++i) {
556 for (j = 0; j < nintf; ++j) {
561 dev_warn(ddev, "config %d has no interface number "
565 /* Allocate the usb_interface_caches and altsetting arrays */
566 for (i = 0; i < nintf; ++i) {
568 if (j > USB_MAXALTSETTING) {
569 dev_warn(ddev, "too many alternate settings for "
570 "config %d interface %d: %d, "
571 "using maximum allowed: %d\n",
572 cfgno, inums[i], j, USB_MAXALTSETTING);
573 nalts[i] = j = USB_MAXALTSETTING;
576 len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j;
577 config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL);
580 kref_init(&intfc->ref);
583 /* FIXME: parse the BOS descriptor */
585 /* Skip over any Class Specific or Vendor Specific descriptors;
586 * find the first interface descriptor */
587 config->extra = buffer;
588 i = find_next_descriptor(buffer, size, USB_DT_INTERFACE,
589 USB_DT_INTERFACE, &n);
590 config->extralen = i;
592 dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
593 n, plural(n), "configuration");
597 /* Parse all the interface/altsetting descriptors */
599 retval = usb_parse_interface(ddev, cfgno, config,
600 buffer, size, inums, nalts);
608 /* Check for missing altsettings */
609 for (i = 0; i < nintf; ++i) {
610 intfc = config->intf_cache[i];
611 for (j = 0; j < intfc->num_altsetting; ++j) {
612 for (n = 0; n < intfc->num_altsetting; ++n) {
613 if (intfc->altsetting[n].desc.
614 bAlternateSetting == j)
617 if (n >= intfc->num_altsetting)
618 dev_warn(ddev, "config %d interface %d has no "
619 "altsetting %d\n", cfgno, inums[i], j);
626 /* hub-only!! ... and only exported for reset/reinit path.
627 * otherwise used internally on disconnect/destroy path
629 void usb_destroy_configuration(struct usb_device *dev)
636 if (dev->rawdescriptors) {
637 for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
638 kfree(dev->rawdescriptors[i]);
640 kfree(dev->rawdescriptors);
641 dev->rawdescriptors = NULL;
644 for (c = 0; c < dev->descriptor.bNumConfigurations; c++) {
645 struct usb_host_config *cf = &dev->config[c];
648 for (i = 0; i < cf->desc.bNumInterfaces; i++) {
649 if (cf->intf_cache[i])
650 kref_put(&cf->intf_cache[i]->ref,
651 usb_release_interface_cache);
660 * Get the USB config descriptors, cache and parse'em
662 * hub-only!! ... and only in reset path, or usb_new_device()
663 * (used by real hubs and virtual root hubs)
665 int usb_get_configuration(struct usb_device *dev)
667 struct device *ddev = &dev->dev;
668 int ncfg = dev->descriptor.bNumConfigurations;
670 unsigned int cfgno, length;
671 unsigned char *bigbuffer;
672 struct usb_config_descriptor *desc;
676 if (ncfg > USB_MAXCONFIG) {
677 dev_warn(ddev, "too many configurations: %d, "
678 "using maximum allowed: %d\n", ncfg, USB_MAXCONFIG);
679 dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG;
683 dev_err(ddev, "no configurations\n");
687 length = ncfg * sizeof(struct usb_host_config);
688 dev->config = kzalloc(length, GFP_KERNEL);
692 length = ncfg * sizeof(char *);
693 dev->rawdescriptors = kzalloc(length, GFP_KERNEL);
694 if (!dev->rawdescriptors)
697 desc = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL);
702 for (; cfgno < ncfg; cfgno++) {
703 /* We grab just the first descriptor so we know how long
704 * the whole configuration is */
705 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
706 desc, USB_DT_CONFIG_SIZE);
708 dev_err(ddev, "unable to read config index %d "
709 "descriptor/%s: %d\n", cfgno, "start", result);
710 if (result != -EPIPE)
712 dev_err(ddev, "chopping to %d config(s)\n", cfgno);
713 dev->descriptor.bNumConfigurations = cfgno;
715 } else if (result < 4) {
716 dev_err(ddev, "config index %d descriptor too short "
717 "(expected %i, got %i)\n", cfgno,
718 USB_DT_CONFIG_SIZE, result);
722 length = max((int) le16_to_cpu(desc->wTotalLength),
725 /* Now that we know the length, get the whole thing */
726 bigbuffer = kmalloc(length, GFP_KERNEL);
732 if (dev->quirks & USB_QUIRK_DELAY_INIT)
735 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
738 dev_err(ddev, "unable to read config index %d "
739 "descriptor/%s\n", cfgno, "all");
743 if (result < length) {
744 dev_warn(ddev, "config index %d descriptor too short "
745 "(expected %i, got %i)\n", cfgno, length, result);
749 dev->rawdescriptors[cfgno] = bigbuffer;
751 result = usb_parse_configuration(dev, cfgno,
752 &dev->config[cfgno], bigbuffer, length);
762 dev->descriptor.bNumConfigurations = cfgno;
764 if (result == -ENOMEM)
765 dev_err(ddev, "out of memory\n");
769 void usb_release_bos_descriptor(struct usb_device *dev)
772 kfree(dev->bos->desc);
778 /* Get BOS descriptor set */
779 int usb_get_bos_descriptor(struct usb_device *dev)
781 struct device *ddev = &dev->dev;
782 struct usb_bos_descriptor *bos;
783 struct usb_dev_cap_header *cap;
784 unsigned char *buffer;
785 int length, total_len, num, i;
788 bos = kzalloc(sizeof(struct usb_bos_descriptor), GFP_KERNEL);
792 /* Get BOS descriptor */
793 ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE);
794 if (ret < USB_DT_BOS_SIZE) {
795 dev_err(ddev, "unable to get BOS descriptor\n");
802 length = bos->bLength;
803 total_len = le16_to_cpu(bos->wTotalLength);
804 num = bos->bNumDeviceCaps;
806 if (total_len < length)
809 dev->bos = kzalloc(sizeof(struct usb_host_bos), GFP_KERNEL);
813 /* Now let's get the whole BOS descriptor set */
814 buffer = kzalloc(total_len, GFP_KERNEL);
819 dev->bos->desc = (struct usb_bos_descriptor *)buffer;
821 ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len);
822 if (ret < total_len) {
823 dev_err(ddev, "unable to get BOS descriptor set\n");
830 for (i = 0; i < num; i++) {
832 cap = (struct usb_dev_cap_header *)buffer;
833 length = cap->bLength;
835 if (total_len < length)
839 if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) {
840 dev_warn(ddev, "descriptor type invalid, skip\n");
844 switch (cap->bDevCapabilityType) {
845 case USB_CAP_TYPE_WIRELESS_USB:
846 /* Wireless USB cap descriptor is handled by wusb */
848 case USB_CAP_TYPE_EXT:
850 (struct usb_ext_cap_descriptor *)buffer;
852 case USB_SS_CAP_TYPE:
854 (struct usb_ss_cap_descriptor *)buffer;
856 case USB_SSP_CAP_TYPE:
858 (struct usb_ssp_cap_descriptor *)buffer;
860 case CONTAINER_ID_TYPE:
862 (struct usb_ss_container_id_descriptor *)buffer;
872 usb_release_bos_descriptor(dev);