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/init.h>
7 #include <linux/slab.h>
8 #include <linux/device.h>
9 #include <asm/byteorder.h>
13 #define USB_MAXALTSETTING 128 /* Hard limit */
14 #define USB_MAXENDPOINTS 30 /* Hard limit */
16 #define USB_MAXCONFIG 8 /* Arbitrary limit */
19 static inline const char *plural(int n)
21 return (n == 1 ? "" : "s");
24 static int find_next_descriptor(unsigned char *buffer, int size,
25 int dt1, int dt2, int *num_skipped)
27 struct usb_descriptor_header *h;
29 unsigned char *buffer0 = buffer;
31 /* Find the next descriptor of type dt1 or dt2 */
33 h = (struct usb_descriptor_header *) buffer;
34 if (h->bDescriptorType == dt1 || h->bDescriptorType == dt2)
41 /* Store the number of descriptors skipped and return the
42 * number of bytes skipped */
45 return buffer - buffer0;
48 static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno,
49 int inum, int asnum, struct usb_host_endpoint *ep,
50 unsigned char *buffer, int size)
52 struct usb_ss_ep_comp_descriptor *desc;
55 /* The SuperSpeed endpoint companion descriptor is supposed to
56 * be the first thing immediately following the endpoint descriptor.
58 desc = (struct usb_ss_ep_comp_descriptor *) buffer;
59 if (desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP ||
60 size < USB_DT_SS_EP_COMP_SIZE) {
61 dev_warn(ddev, "No SuperSpeed endpoint companion for config %d "
62 " interface %d altsetting %d ep %d: "
63 "using minimum values\n",
64 cfgno, inum, asnum, ep->desc.bEndpointAddress);
66 /* Fill in some default values.
67 * Leave bmAttributes as zero, which will mean no streams for
68 * bulk, and isoc won't support multiple bursts of packets.
69 * With bursts of only one packet, and a Mult of 1, the max
70 * amount of data moved per endpoint service interval is one
73 ep->ss_ep_comp.bLength = USB_DT_SS_EP_COMP_SIZE;
74 ep->ss_ep_comp.bDescriptorType = USB_DT_SS_ENDPOINT_COMP;
75 if (usb_endpoint_xfer_isoc(&ep->desc) ||
76 usb_endpoint_xfer_int(&ep->desc))
77 ep->ss_ep_comp.wBytesPerInterval =
78 ep->desc.wMaxPacketSize;
82 memcpy(&ep->ss_ep_comp, desc, USB_DT_SS_EP_COMP_SIZE);
84 /* Check the various values */
85 if (usb_endpoint_xfer_control(&ep->desc) && desc->bMaxBurst != 0) {
86 dev_warn(ddev, "Control endpoint with bMaxBurst = %d in "
87 "config %d interface %d altsetting %d ep %d: "
88 "setting to zero\n", desc->bMaxBurst,
89 cfgno, inum, asnum, ep->desc.bEndpointAddress);
90 ep->ss_ep_comp.bMaxBurst = 0;
91 } else if (desc->bMaxBurst > 15) {
92 dev_warn(ddev, "Endpoint with bMaxBurst = %d in "
93 "config %d interface %d altsetting %d ep %d: "
94 "setting to 15\n", desc->bMaxBurst,
95 cfgno, inum, asnum, ep->desc.bEndpointAddress);
96 ep->ss_ep_comp.bMaxBurst = 15;
99 if ((usb_endpoint_xfer_control(&ep->desc) ||
100 usb_endpoint_xfer_int(&ep->desc)) &&
101 desc->bmAttributes != 0) {
102 dev_warn(ddev, "%s endpoint with bmAttributes = %d in "
103 "config %d interface %d altsetting %d ep %d: "
105 usb_endpoint_xfer_control(&ep->desc) ? "Control" : "Bulk",
107 cfgno, inum, asnum, ep->desc.bEndpointAddress);
108 ep->ss_ep_comp.bmAttributes = 0;
109 } else if (usb_endpoint_xfer_bulk(&ep->desc) &&
110 desc->bmAttributes > 16) {
111 dev_warn(ddev, "Bulk endpoint with more than 65536 streams in "
112 "config %d interface %d altsetting %d ep %d: "
114 cfgno, inum, asnum, ep->desc.bEndpointAddress);
115 ep->ss_ep_comp.bmAttributes = 16;
116 } else if (usb_endpoint_xfer_isoc(&ep->desc) &&
117 desc->bmAttributes > 2) {
118 dev_warn(ddev, "Isoc endpoint has Mult of %d in "
119 "config %d interface %d altsetting %d ep %d: "
120 "setting to 3\n", desc->bmAttributes + 1,
121 cfgno, inum, asnum, ep->desc.bEndpointAddress);
122 ep->ss_ep_comp.bmAttributes = 2;
125 if (usb_endpoint_xfer_isoc(&ep->desc))
126 max_tx = (desc->bMaxBurst + 1) * (desc->bmAttributes + 1) *
127 usb_endpoint_maxp(&ep->desc);
128 else if (usb_endpoint_xfer_int(&ep->desc))
129 max_tx = usb_endpoint_maxp(&ep->desc) *
130 (desc->bMaxBurst + 1);
133 if (le16_to_cpu(desc->wBytesPerInterval) > max_tx) {
134 dev_warn(ddev, "%s endpoint with wBytesPerInterval of %d in "
135 "config %d interface %d altsetting %d ep %d: "
137 usb_endpoint_xfer_isoc(&ep->desc) ? "Isoc" : "Int",
138 le16_to_cpu(desc->wBytesPerInterval),
139 cfgno, inum, asnum, ep->desc.bEndpointAddress,
141 ep->ss_ep_comp.wBytesPerInterval = cpu_to_le16(max_tx);
145 static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
146 int asnum, struct usb_host_interface *ifp, int num_ep,
147 unsigned char *buffer, int size)
149 unsigned char *buffer0 = buffer;
150 struct usb_endpoint_descriptor *d;
151 struct usb_host_endpoint *endpoint;
154 d = (struct usb_endpoint_descriptor *) buffer;
155 buffer += d->bLength;
158 if (d->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE)
159 n = USB_DT_ENDPOINT_AUDIO_SIZE;
160 else if (d->bLength >= USB_DT_ENDPOINT_SIZE)
161 n = USB_DT_ENDPOINT_SIZE;
163 dev_warn(ddev, "config %d interface %d altsetting %d has an "
164 "invalid endpoint descriptor of length %d, skipping\n",
165 cfgno, inum, asnum, d->bLength);
166 goto skip_to_next_endpoint_or_interface_descriptor;
169 i = d->bEndpointAddress & ~USB_ENDPOINT_DIR_MASK;
170 if (i >= 16 || i == 0) {
171 dev_warn(ddev, "config %d interface %d altsetting %d has an "
172 "invalid endpoint with address 0x%X, skipping\n",
173 cfgno, inum, asnum, d->bEndpointAddress);
174 goto skip_to_next_endpoint_or_interface_descriptor;
177 /* Only store as many endpoints as we have room for */
178 if (ifp->desc.bNumEndpoints >= num_ep)
179 goto skip_to_next_endpoint_or_interface_descriptor;
181 endpoint = &ifp->endpoint[ifp->desc.bNumEndpoints];
182 ++ifp->desc.bNumEndpoints;
184 memcpy(&endpoint->desc, d, n);
185 INIT_LIST_HEAD(&endpoint->urb_list);
187 /* Fix up bInterval values outside the legal range. Use 32 ms if no
188 * proper value can be guessed. */
189 i = 0; /* i = min, j = max, n = default */
191 if (usb_endpoint_xfer_int(d)) {
193 switch (to_usb_device(ddev)->speed) {
194 case USB_SPEED_SUPER:
196 /* Many device manufacturers are using full-speed
197 * bInterval values in high-speed interrupt endpoint
198 * descriptors. Try to fix those and fall back to a
199 * 32 ms default value otherwise. */
200 n = fls(d->bInterval*8);
202 n = 9; /* 32 ms = 2^(9-1) uframes */
205 default: /* USB_SPEED_FULL or _LOW */
206 /* For low-speed, 10 ms is the official minimum.
207 * But some "overclocked" devices might want faster
208 * polling so we'll allow it. */
212 } else if (usb_endpoint_xfer_isoc(d)) {
215 switch (to_usb_device(ddev)->speed) {
217 n = 9; /* 32 ms = 2^(9-1) uframes */
219 default: /* USB_SPEED_FULL */
220 n = 6; /* 32 ms = 2^(6-1) frames */
224 if (d->bInterval < i || d->bInterval > j) {
225 dev_warn(ddev, "config %d interface %d altsetting %d "
226 "endpoint 0x%X has an invalid bInterval %d, "
229 d->bEndpointAddress, d->bInterval, n);
230 endpoint->desc.bInterval = n;
233 /* Some buggy low-speed devices have Bulk endpoints, which is
234 * explicitly forbidden by the USB spec. In an attempt to make
235 * them usable, we will try treating them as Interrupt endpoints.
237 if (to_usb_device(ddev)->speed == USB_SPEED_LOW &&
238 usb_endpoint_xfer_bulk(d)) {
239 dev_warn(ddev, "config %d interface %d altsetting %d "
240 "endpoint 0x%X is Bulk; changing to Interrupt\n",
241 cfgno, inum, asnum, d->bEndpointAddress);
242 endpoint->desc.bmAttributes = USB_ENDPOINT_XFER_INT;
243 endpoint->desc.bInterval = 1;
244 if (usb_endpoint_maxp(&endpoint->desc) > 8)
245 endpoint->desc.wMaxPacketSize = cpu_to_le16(8);
249 * Some buggy high speed devices have bulk endpoints using
250 * maxpacket sizes other than 512. High speed HCDs may not
251 * be able to handle that particular bug, so let's warn...
253 if (to_usb_device(ddev)->speed == USB_SPEED_HIGH
254 && usb_endpoint_xfer_bulk(d)) {
257 maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff;
259 dev_warn(ddev, "config %d interface %d altsetting %d "
260 "bulk endpoint 0x%X has invalid maxpacket %d\n",
261 cfgno, inum, asnum, d->bEndpointAddress,
265 /* Parse a possible SuperSpeed endpoint companion descriptor */
266 if (to_usb_device(ddev)->speed == USB_SPEED_SUPER)
267 usb_parse_ss_endpoint_companion(ddev, cfgno,
268 inum, asnum, endpoint, buffer, size);
270 /* Skip over any Class Specific or Vendor Specific descriptors;
271 * find the next endpoint or interface descriptor */
272 endpoint->extra = buffer;
273 i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
274 USB_DT_INTERFACE, &n);
275 endpoint->extralen = i;
276 retval = buffer - buffer0 + i;
278 dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
279 n, plural(n), "endpoint");
282 skip_to_next_endpoint_or_interface_descriptor:
283 i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
284 USB_DT_INTERFACE, NULL);
285 return buffer - buffer0 + i;
288 void usb_release_interface_cache(struct kref *ref)
290 struct usb_interface_cache *intfc = ref_to_usb_interface_cache(ref);
293 for (j = 0; j < intfc->num_altsetting; j++) {
294 struct usb_host_interface *alt = &intfc->altsetting[j];
296 kfree(alt->endpoint);
302 static int usb_parse_interface(struct device *ddev, int cfgno,
303 struct usb_host_config *config, unsigned char *buffer, int size,
304 u8 inums[], u8 nalts[])
306 unsigned char *buffer0 = buffer;
307 struct usb_interface_descriptor *d;
309 struct usb_interface_cache *intfc;
310 struct usb_host_interface *alt;
313 int num_ep, num_ep_orig;
315 d = (struct usb_interface_descriptor *) buffer;
316 buffer += d->bLength;
319 if (d->bLength < USB_DT_INTERFACE_SIZE)
320 goto skip_to_next_interface_descriptor;
322 /* Which interface entry is this? */
324 inum = d->bInterfaceNumber;
325 for (i = 0; i < config->desc.bNumInterfaces; ++i) {
326 if (inums[i] == inum) {
327 intfc = config->intf_cache[i];
331 if (!intfc || intfc->num_altsetting >= nalts[i])
332 goto skip_to_next_interface_descriptor;
334 /* Check for duplicate altsetting entries */
335 asnum = d->bAlternateSetting;
336 for ((i = 0, alt = &intfc->altsetting[0]);
337 i < intfc->num_altsetting;
339 if (alt->desc.bAlternateSetting == asnum) {
340 dev_warn(ddev, "Duplicate descriptor for config %d "
341 "interface %d altsetting %d, skipping\n",
343 goto skip_to_next_interface_descriptor;
347 ++intfc->num_altsetting;
348 memcpy(&alt->desc, d, USB_DT_INTERFACE_SIZE);
350 /* Skip over any Class Specific or Vendor Specific descriptors;
351 * find the first endpoint or interface descriptor */
353 i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
354 USB_DT_INTERFACE, &n);
357 dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
358 n, plural(n), "interface");
362 /* Allocate space for the right(?) number of endpoints */
363 num_ep = num_ep_orig = alt->desc.bNumEndpoints;
364 alt->desc.bNumEndpoints = 0; /* Use as a counter */
365 if (num_ep > USB_MAXENDPOINTS) {
366 dev_warn(ddev, "too many endpoints for config %d interface %d "
367 "altsetting %d: %d, using maximum allowed: %d\n",
368 cfgno, inum, asnum, num_ep, USB_MAXENDPOINTS);
369 num_ep = USB_MAXENDPOINTS;
373 /* Can't allocate 0 bytes */
374 len = sizeof(struct usb_host_endpoint) * num_ep;
375 alt->endpoint = kzalloc(len, GFP_KERNEL);
380 /* Parse all the endpoint descriptors */
383 if (((struct usb_descriptor_header *) buffer)->bDescriptorType
386 retval = usb_parse_endpoint(ddev, cfgno, inum, asnum, alt,
387 num_ep, buffer, size);
396 if (n != num_ep_orig)
397 dev_warn(ddev, "config %d interface %d altsetting %d has %d "
398 "endpoint descriptor%s, different from the interface "
399 "descriptor's value: %d\n",
400 cfgno, inum, asnum, n, plural(n), num_ep_orig);
401 return buffer - buffer0;
403 skip_to_next_interface_descriptor:
404 i = find_next_descriptor(buffer, size, USB_DT_INTERFACE,
405 USB_DT_INTERFACE, NULL);
406 return buffer - buffer0 + i;
409 static int usb_parse_configuration(struct usb_device *dev, int cfgidx,
410 struct usb_host_config *config, unsigned char *buffer, int size)
412 struct device *ddev = &dev->dev;
413 unsigned char *buffer0 = buffer;
415 int nintf, nintf_orig;
417 struct usb_interface_cache *intfc;
418 unsigned char *buffer2;
420 struct usb_descriptor_header *header;
422 u8 inums[USB_MAXINTERFACES], nalts[USB_MAXINTERFACES];
423 unsigned iad_num = 0;
425 memcpy(&config->desc, buffer, USB_DT_CONFIG_SIZE);
426 if (config->desc.bDescriptorType != USB_DT_CONFIG ||
427 config->desc.bLength < USB_DT_CONFIG_SIZE ||
428 config->desc.bLength > size) {
429 dev_err(ddev, "invalid descriptor for config index %d: "
430 "type = 0x%X, length = %d\n", cfgidx,
431 config->desc.bDescriptorType, config->desc.bLength);
434 cfgno = config->desc.bConfigurationValue;
436 buffer += config->desc.bLength;
437 size -= config->desc.bLength;
439 nintf = nintf_orig = config->desc.bNumInterfaces;
440 if (nintf > USB_MAXINTERFACES) {
441 dev_warn(ddev, "config %d has too many interfaces: %d, "
442 "using maximum allowed: %d\n",
443 cfgno, nintf, USB_MAXINTERFACES);
444 nintf = USB_MAXINTERFACES;
447 /* Go through the descriptors, checking their length and counting the
448 * number of altsettings for each interface */
450 for ((buffer2 = buffer, size2 = size);
452 (buffer2 += header->bLength, size2 -= header->bLength)) {
454 if (size2 < sizeof(struct usb_descriptor_header)) {
455 dev_warn(ddev, "config %d descriptor has %d excess "
456 "byte%s, ignoring\n",
457 cfgno, size2, plural(size2));
461 header = (struct usb_descriptor_header *) buffer2;
462 if ((header->bLength > size2) || (header->bLength < 2)) {
463 dev_warn(ddev, "config %d has an invalid descriptor "
464 "of length %d, skipping remainder of the config\n",
465 cfgno, header->bLength);
469 if (header->bDescriptorType == USB_DT_INTERFACE) {
470 struct usb_interface_descriptor *d;
473 d = (struct usb_interface_descriptor *) header;
474 if (d->bLength < USB_DT_INTERFACE_SIZE) {
475 dev_warn(ddev, "config %d has an invalid "
476 "interface descriptor of length %d, "
477 "skipping\n", cfgno, d->bLength);
481 inum = d->bInterfaceNumber;
483 if ((dev->quirks & USB_QUIRK_HONOR_BNUMINTERFACES) &&
485 dev_warn(ddev, "config %d has more interface "
486 "descriptors, than it declares in "
487 "bNumInterfaces, ignoring interface "
488 "number: %d\n", cfgno, inum);
492 if (inum >= nintf_orig)
493 dev_warn(ddev, "config %d has an invalid "
494 "interface number: %d but max is %d\n",
495 cfgno, inum, nintf_orig - 1);
497 /* Have we already encountered this interface?
498 * Count its altsettings */
499 for (i = 0; i < n; ++i) {
500 if (inums[i] == inum)
506 } else if (n < USB_MAXINTERFACES) {
512 } else if (header->bDescriptorType ==
513 USB_DT_INTERFACE_ASSOCIATION) {
514 if (iad_num == USB_MAXIADS) {
515 dev_warn(ddev, "found more Interface "
516 "Association Descriptors "
517 "than allocated for in "
518 "configuration %d\n", cfgno);
520 config->intf_assoc[iad_num] =
521 (struct usb_interface_assoc_descriptor
526 } else if (header->bDescriptorType == USB_DT_DEVICE ||
527 header->bDescriptorType == USB_DT_CONFIG)
528 dev_warn(ddev, "config %d contains an unexpected "
529 "descriptor of type 0x%X, skipping\n",
530 cfgno, header->bDescriptorType);
532 } /* for ((buffer2 = buffer, size2 = size); ...) */
533 size = buffer2 - buffer;
534 config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0);
537 dev_warn(ddev, "config %d has %d interface%s, different from "
538 "the descriptor's value: %d\n",
539 cfgno, n, plural(n), nintf_orig);
541 dev_warn(ddev, "config %d has no interfaces?\n", cfgno);
542 config->desc.bNumInterfaces = nintf = n;
544 /* Check for missing interface numbers */
545 for (i = 0; i < nintf; ++i) {
546 for (j = 0; j < nintf; ++j) {
551 dev_warn(ddev, "config %d has no interface number "
555 /* Allocate the usb_interface_caches and altsetting arrays */
556 for (i = 0; i < nintf; ++i) {
558 if (j > USB_MAXALTSETTING) {
559 dev_warn(ddev, "too many alternate settings for "
560 "config %d interface %d: %d, "
561 "using maximum allowed: %d\n",
562 cfgno, inums[i], j, USB_MAXALTSETTING);
563 nalts[i] = j = USB_MAXALTSETTING;
566 len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j;
567 config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL);
570 kref_init(&intfc->ref);
573 /* FIXME: parse the BOS descriptor */
575 /* Skip over any Class Specific or Vendor Specific descriptors;
576 * find the first interface descriptor */
577 config->extra = buffer;
578 i = find_next_descriptor(buffer, size, USB_DT_INTERFACE,
579 USB_DT_INTERFACE, &n);
580 config->extralen = i;
582 dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
583 n, plural(n), "configuration");
587 /* Parse all the interface/altsetting descriptors */
589 retval = usb_parse_interface(ddev, cfgno, config,
590 buffer, size, inums, nalts);
598 /* Check for missing altsettings */
599 for (i = 0; i < nintf; ++i) {
600 intfc = config->intf_cache[i];
601 for (j = 0; j < intfc->num_altsetting; ++j) {
602 for (n = 0; n < intfc->num_altsetting; ++n) {
603 if (intfc->altsetting[n].desc.
604 bAlternateSetting == j)
607 if (n >= intfc->num_altsetting)
608 dev_warn(ddev, "config %d interface %d has no "
609 "altsetting %d\n", cfgno, inums[i], j);
616 /* hub-only!! ... and only exported for reset/reinit path.
617 * otherwise used internally on disconnect/destroy path
619 void usb_destroy_configuration(struct usb_device *dev)
626 if (dev->rawdescriptors) {
627 for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
628 kfree(dev->rawdescriptors[i]);
630 kfree(dev->rawdescriptors);
631 dev->rawdescriptors = NULL;
634 for (c = 0; c < dev->descriptor.bNumConfigurations; c++) {
635 struct usb_host_config *cf = &dev->config[c];
638 for (i = 0; i < cf->desc.bNumInterfaces; i++) {
639 if (cf->intf_cache[i])
640 kref_put(&cf->intf_cache[i]->ref,
641 usb_release_interface_cache);
650 * Get the USB config descriptors, cache and parse'em
652 * hub-only!! ... and only in reset path, or usb_new_device()
653 * (used by real hubs and virtual root hubs)
655 * NOTE: if this is a WUSB device and is not authorized, we skip the
656 * whole thing. A non-authorized USB device has no
659 int usb_get_configuration(struct usb_device *dev)
661 struct device *ddev = &dev->dev;
662 int ncfg = dev->descriptor.bNumConfigurations;
664 unsigned int cfgno, length;
665 unsigned char *bigbuffer;
666 struct usb_config_descriptor *desc;
669 if (dev->authorized == 0) /* Not really an error */
670 goto out_not_authorized;
672 if (ncfg > USB_MAXCONFIG) {
673 dev_warn(ddev, "too many configurations: %d, "
674 "using maximum allowed: %d\n", ncfg, USB_MAXCONFIG);
675 dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG;
679 dev_err(ddev, "no configurations\n");
683 length = ncfg * sizeof(struct usb_host_config);
684 dev->config = kzalloc(length, GFP_KERNEL);
688 length = ncfg * sizeof(char *);
689 dev->rawdescriptors = kzalloc(length, GFP_KERNEL);
690 if (!dev->rawdescriptors)
693 desc = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL);
698 for (; cfgno < ncfg; cfgno++) {
699 /* We grab just the first descriptor so we know how long
700 * the whole configuration is */
701 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
702 desc, USB_DT_CONFIG_SIZE);
704 dev_err(ddev, "unable to read config index %d "
705 "descriptor/%s: %d\n", cfgno, "start", result);
706 dev_err(ddev, "chopping to %d config(s)\n", cfgno);
707 dev->descriptor.bNumConfigurations = cfgno;
709 } else if (result < 4) {
710 dev_err(ddev, "config index %d descriptor too short "
711 "(expected %i, got %i)\n", cfgno,
712 USB_DT_CONFIG_SIZE, result);
716 length = max((int) le16_to_cpu(desc->wTotalLength),
719 /* Now that we know the length, get the whole thing */
720 bigbuffer = kmalloc(length, GFP_KERNEL);
726 if (dev->quirks & USB_QUIRK_DELAY_INIT)
729 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
732 dev_err(ddev, "unable to read config index %d "
733 "descriptor/%s\n", cfgno, "all");
737 if (result < length) {
738 dev_warn(ddev, "config index %d descriptor too short "
739 "(expected %i, got %i)\n", cfgno, length, result);
743 dev->rawdescriptors[cfgno] = bigbuffer;
745 result = usb_parse_configuration(dev, cfgno,
746 &dev->config[cfgno], bigbuffer, length);
757 dev->descriptor.bNumConfigurations = cfgno;
759 if (result == -ENOMEM)
760 dev_err(ddev, "out of memory\n");
764 void usb_release_bos_descriptor(struct usb_device *dev)
767 kfree(dev->bos->desc);
773 /* Get BOS descriptor set */
774 int usb_get_bos_descriptor(struct usb_device *dev)
776 struct device *ddev = &dev->dev;
777 struct usb_bos_descriptor *bos;
778 struct usb_dev_cap_header *cap;
779 unsigned char *buffer;
780 int length, total_len, num, i;
783 bos = kzalloc(sizeof(struct usb_bos_descriptor), GFP_KERNEL);
787 /* Get BOS descriptor */
788 ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE);
789 if (ret < USB_DT_BOS_SIZE) {
790 dev_err(ddev, "unable to get BOS descriptor\n");
797 length = bos->bLength;
798 total_len = le16_to_cpu(bos->wTotalLength);
799 num = bos->bNumDeviceCaps;
801 if (total_len < length)
804 dev->bos = kzalloc(sizeof(struct usb_host_bos), GFP_KERNEL);
808 /* Now let's get the whole BOS descriptor set */
809 buffer = kzalloc(total_len, GFP_KERNEL);
814 dev->bos->desc = (struct usb_bos_descriptor *)buffer;
816 ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len);
817 if (ret < total_len) {
818 dev_err(ddev, "unable to get BOS descriptor set\n");
825 for (i = 0; i < num; i++) {
827 cap = (struct usb_dev_cap_header *)buffer;
828 length = cap->bLength;
830 if (total_len < length)
834 if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) {
835 dev_warn(ddev, "descriptor type invalid, skip\n");
839 switch (cap->bDevCapabilityType) {
840 case USB_CAP_TYPE_WIRELESS_USB:
841 /* Wireless USB cap descriptor is handled by wusb */
843 case USB_CAP_TYPE_EXT:
845 (struct usb_ext_cap_descriptor *)buffer;
847 case USB_SS_CAP_TYPE:
849 (struct usb_ss_cap_descriptor *)buffer;
851 case CONTAINER_ID_TYPE:
853 (struct usb_ss_container_id_descriptor *)buffer;
863 usb_release_bos_descriptor(dev);